Merge branch 'c' of https://106.52.207.92:9103/limingjie/OmniSocketGo into c

This reverts commit 2f2c2008e7.

.claude/settings.local.json

@@ -11,7 +11,8 @@
       "Bash(git pull:*)",
       "Bash(wc:*)",
       "Bash(python3 -c \"import dis, marshal, types; f = open\\(''''C:/Users/64187/Desktop/Workspace/OmniSocketGo/__pycache__/omnisocket_video_sender.cpython-312.pyc'''',''''rb''''\\); f.read\\(16\\); code=marshal.load\\(f\\); dis.dis\\(code\\)\")",
-      "Bash(gh pr:*)"
+      "Bash(gh pr:*)",
+      "Bash(python3 -c ':*)"
     ]
   }
 }

.gitignore

@@ -17,4 +17,12 @@ c/bin
 /python/build
 /python/omnisocket.egg-info
 
-*.so*
+*.so*
+
+/.venv
+
+**/build/
+
+ros-control-py/install
+ros-control-py/log
+scripts/boot/modem_network_info.json

AGENT.md

@@ -0,0 +1,54 @@
+# 通信场景说明
+
+## 系统拓扑
+- 系统中有 `A/B/C/D` 四个终端。
+- `A` 与 `C` 在同一侧，`B` 与 `D` 在同一侧。
+- 实际运行时不是一条端到端 KCP，而是两条独立 KCP 链路：
+  - `B <-> D`
+  - `D <-> A`
+- `C` 只负责 UDP 端口转发。
+- 整体目标是让 `A` 与 `B` 双向通信：
+  - `A -> B` 发送控制命令
+  - `B -> A` 发送视频和其他反馈数据
+
+## 网络情况
+- 主要瓶颈在 `B` 侧 5G 链路，`A` 侧是有线网络，不是主要约束。
+- `B <-> D` 的时延抖动较大：
+  - 常见约 `15-60 ms`
+  - 最差约 `80-90 ms`
+- 带宽是明显非对称的：
+  - `B -> D` 约 `8 Mbps`，偏低且不稳定
+  - `D -> B` 约 `27-50 Mbps`，更高但也有波动
+- 工程含义：
+  - 控制流必须优先保障
+  - 视频流必须限速并具备自适应能力
+  - 不能默认把所有流合成一个共享传输就一定更优
+
+## 三个项目的角色
+- `OmniSocketGo`
+  - 底层传输项目
+  - 使用 C 编写
+  - 提供 OmniSocket/KCP 传输能力，以及视频发送等原生传输程序
+- `robot-command-center`
+  - A 侧上层应用
+  - 主要负责接收视频帧，并提供监控/展示能力
+  - 当前通过本机 `A-side OmniDaemon` 使用传输能力
+- `tienkung-szu`
+  - 上层控制项目
+  - 同时包含 A 侧控制发送和 B 侧控制执行逻辑
+  - A 侧典型入口是键盘/Xbox sender
+  - B 侧典型入口是 `rl_control_node.py` / `rl_control_node_sim.py`，负责接收控制并驱动机器人行为
+
+## 当前架构方向
+- `A` 侧通过 `A-side OmniDaemon` 统一管理本机的控制发送和视频接收。
+- `B` 侧通过 `B-side OmniDaemon` 统一管理本机的控制接收和视频发送。
+- 核心原则：
+  - 控制流与视频流逻辑分离
+  - 每台主机通过本地 daemon 统一持有传输会话
+  - 后续围绕真实网络瓶颈做 telemetry、调度和速率自适应
+
+## 代码原则
+- 一定要精简，不能写过于复杂和冗余的代码，因为必须确保各个环节可控，在低延迟的要求下，需要细化各个环节的消耗
+
+## SSH原则
+- 如果你需要SSH到某个远程端执行操作，一定要确保不做删除文件操作，确保留有记录

CLAUDE.md

@@ -0,0 +1,54 @@
+# 通信场景说明
+
+## 系统拓扑
+- 系统中有 `A/B/C/D` 四个终端。
+- `A` 与 `C` 在同一侧，`B` 与 `D` 在同一侧。
+- 实际运行时不是一条端到端 KCP，而是两条独立 KCP 链路：
+  - `B <-> D`
+  - `D <-> A`
+- `C` 只负责 UDP 端口转发。
+- 整体目标是让 `A` 与 `B` 双向通信：
+  - `A -> B` 发送控制命令
+  - `B -> A` 发送视频和其他反馈数据
+
+## 网络情况
+- 主要瓶颈在 `B` 侧 5G 链路，`A` 侧是有线网络，不是主要约束。
+- `B <-> D` 的时延抖动较大：
+  - 常见约 `15-60 ms`
+  - 最差约 `80-90 ms`
+- 带宽是明显非对称的：
+  - `B -> D` 约 `8 Mbps`，偏低且不稳定
+  - `D -> B` 约 `27-50 Mbps`，更高但也有波动
+- 工程含义：
+  - 控制流必须优先保障
+  - 视频流必须限速并具备自适应能力
+  - 不能默认把所有流合成一个共享传输就一定更优
+
+## 三个项目的角色
+- `OmniSocketGo`
+  - 底层传输项目
+  - 使用 C 编写
+  - 提供 OmniSocket/KCP 传输能力，以及视频发送等原生传输程序
+- `robot-command-center`
+  - A 侧上层应用
+  - 主要负责接收视频帧，并提供监控/展示能力
+  - 当前通过本机 `A-side OmniDaemon` 使用传输能力
+- `tienkung-szu`
+  - 上层控制项目
+  - 同时包含 A 侧控制发送和 B 侧控制执行逻辑
+  - A 侧典型入口是键盘/Xbox sender
+  - B 侧典型入口是 `rl_control_node.py` / `rl_control_node_sim.py`，负责接收控制并驱动机器人行为
+
+## 当前架构方向
+- `A` 侧通过 `A-side OmniDaemon` 统一管理本机的控制发送和视频接收。
+- `B` 侧通过 `B-side OmniDaemon` 统一管理本机的控制接收和视频发送。
+- 核心原则：
+  - 控制流与视频流逻辑分离
+  - 每台主机通过本地 daemon 统一持有传输会话
+  - 后续围绕真实网络瓶颈做 telemetry、调度和速率自适应
+
+## 代码原则
+- 一定要精简，不能写过于复杂和冗余的代码，因为必须确保各个环节可控，在低延迟的要求下，需要细化各个环节的消耗
+
+## SSH原则
+- 如果你需要SSH到某个远程端执行操作，一定要确保不做删除文件操作，确保留有记录

Makefile

@@ -4,6 +4,10 @@ CPPFLAGS ?= -Iinclude -Ithird_party/cjson -Ithird_party/kcp
 LDFLAGS ?= -pthread
 PYTHON ?= python3
 
+ifeq ($(QUIET_FFMPEG_LOGS),1)
+CFLAGS += -DQUIET_FFMPEG_LOGS
+endif
+
 BIN_DIR := bin
 SRC_DIR := src
 CMD_DIR := cmd
@@ -37,8 +41,9 @@ TARGETS := \
 	$(BIN_DIR)/kcpping
 
 CAMERA_VIDEO_SENDER := $(BIN_DIR)/camera_video_sender
-CAMERA_VIDEO_SENDER_SRCS := \
-	$(CMD_DIR)/v1_camera_pipeline_ifdef.c \
+FFMPEG_PIPELINE_COMMON_SRCS := \
+	$(SRC_DIR)/video_pipeline.c \
+	$(SRC_DIR)/gps_buffer.c \
 	$(SRC_DIR)/omni_common.c \
 	$(SRC_DIR)/protocol.c \
 	$(SRC_DIR)/latencylog.c \
@@ -50,19 +55,14 @@ CAMERA_VIDEO_SENDER_SRCS := \
 	third_party/cjson/cJSON.c \
 	third_party/kcp/ikcp.c
 
-B_SIDE_VIDEO_SENDER := $(BIN_DIR)/b_side_video_sender
-B_SIDE_VIDEO_SENDER_SRCS := \
-	$(CMD_DIR)/b_side_video_sender.c \
-	$(SRC_DIR)/omni_common.c \
-	$(SRC_DIR)/protocol.c \
-	$(SRC_DIR)/latencylog.c \
-	$(SRC_DIR)/kcp_packet_debug.c \
-	$(SRC_DIR)/kcp_session_stats.c \
-	$(SRC_DIR)/linux_timestamping.c \
-	$(SRC_DIR)/transport_kcp.c \
-	$(SRC_DIR)/peer_kcp_client.c \
-	third_party/cjson/cJSON.c \
-	third_party/kcp/ikcp.c
+CAMERA_VIDEO_SENDER_SRCS := \
+	$(CMD_DIR)/v1_camera_pipeline_ifdef.c \
+	$(FFMPEG_PIPELINE_COMMON_SRCS)
+
+B_SIDE_OMNID := $(BIN_DIR)/b_side_omnid
+B_SIDE_OMNID_SRCS := \
+	$(CMD_DIR)/b_side_omnid.c \
+	$(FFMPEG_PIPELINE_COMMON_SRCS)
 
 all: $(TARGETS)
 
@@ -91,14 +91,14 @@ $(BIN_DIR)/kcpping: $(CMD_DIR)/kcpping.c $(COMMON_SRCS) | $(BIN_DIR)
 	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ $^ $(LDFLAGS)
 
 $(CAMERA_VIDEO_SENDER): $(CAMERA_VIDEO_SENDER_SRCS) | $(BIN_DIR)
-	$(CC) $(CFLAGS) $(CPPFLAGS) $$(pkg-config --cflags libavformat libavcodec libavutil libswscale) -o $@ $^ $(LDFLAGS) $$(pkg-config --libs libavformat libavcodec libavutil libswscale)
+	$(CC) $(CFLAGS) $(CPPFLAGS) $$(pkg-config --cflags libavformat libavcodec libavutil libswscale) -o $@ $^ $(LDFLAGS) $$(pkg-config --libs libavformat libavcodec libavutil libswscale) -lm
 
 camera_video_sender: $(CAMERA_VIDEO_SENDER)
 
-$(B_SIDE_VIDEO_SENDER): $(B_SIDE_VIDEO_SENDER_SRCS) | $(BIN_DIR)
-	$(CC) $(CFLAGS) $(CPPFLAGS) $$(pkg-config --cflags libavformat libavcodec libavutil libswscale) -o $@ $^ $(LDFLAGS) $$(pkg-config --libs libavformat libavcodec libavutil libswscale)
+$(B_SIDE_OMNID): $(B_SIDE_OMNID_SRCS) | $(BIN_DIR)
+	$(CC) $(CFLAGS) $(CPPFLAGS) $$(pkg-config --cflags libavformat libavcodec libavutil libswscale) -o $@ $^ $(LDFLAGS) $$(pkg-config --libs libavformat libavcodec libavutil libswscale) -lm
 
-b_side_video_sender: $(B_SIDE_VIDEO_SENDER)
+b_side_omnid: $(B_SIDE_OMNID)
 
 clean:
 	rm -rf $(BIN_DIR)
@@ -109,4 +109,4 @@ python-ext:
 python-install:
 	cd python && $(PYTHON) -m pip install -e .
 
-.PHONY: all clean python-ext python-install camera_video_sender b_side_video_sender
+.PHONY: all clean python-ext python-install camera_video_sender b_side_omnid

README.md

@@ -27,40 +27,20 @@ make python-ext
 make python-install
 ```
 
-## A-Side OmniDaemon
-
-The A-side daemon is configured from `config/a_side_omnidaemon.yaml` in this repo. The safest way to start it is to pass that file explicitly, because the installed Python package does not bundle the YAML config.
-
-Run from a source checkout:
-
-```bash
-python -m omnisocket_a_side.daemon --config "$(pwd)/config/a_side_omnidaemon.yaml"
-```
-
-Or, if you installed the console script:
-
-```bash
-OMNIDAEMON_CONFIG="$(pwd)/config/a_side_omnidaemon.yaml" \
-omnisocket-a-side-daemon
-```
-
-Optional overrides:
-
-- `OMNIDAEMON_SOCKET=/tmp/omnisocket-a-side.sock` selects the local UDS path.
-- `OMNIDAEMON_CONFIG=/abs/path/to/a_side_omnidaemon.yaml` overrides `--config`.
-
-For `robot-command-center` and the A-side senders, keep the daemon and its clients on the same Linux machine so they can share the Unix-domain socket.
-
 ## Run On Different Machines
 
 Server `D` runs the KCP hub on `0.0.0.0:10909`:
 
 ```bash
 ./bin/kcpserver -listen 0.0.0.0:10909 \
-  -kcp-ts-debug-log logs/d-kcp-ts.jsonl \
-  -kcp-session-stats-log logs/d-kcp-stats.jsonl
+  -telemetry-peer peer-a-telemetry \
+  -telemetry-interval 1000ms \
+  -kcp-session-stats-log logs/d-kcp-stats.jsonl \
+  -kcp-session-stats-interval 1000ms
 ```
 
+For multi-hour runs, keep `-latency-log` and `-kcp-ts-debug-log` off unless you are collecting a short repro trace.
+
 Relay `C` runs a raw UDP forwarder to `D`:
 
 ```bash

cmd/b_side_omnid.c

@@ -0,0 +1,895 @@
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdatomic.h>
+#include <stdint.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "cJSON.h"
+#include "control_protocol.h"
+#include "protocol.h"
+#include "video_pipeline.h"
+
+#define CONTROL_DEFAULT_PEER_ID "peer-b-ctrl"
+#define CONTROL_DEFAULT_EXPECTED_SENDER "peer-a-ctrl"
+#define CONTROL_DEFAULT_UNIX_SOCKET "/tmp/omnisocket-b-side-cmd.sock"
+#define CONTROL_DEFAULT_SERVER_IDLE_RECONNECT_MS 3000
+#define DEFAULT_RUNTIME_DIR "/run/blitz-robot"
+#define DEFAULT_STATUS_FILE_NAME "b-side-omnid.status.json"
+#define DEFAULT_VIDEO_THREAD_FAULT_FILE "fault-injection-bside-video-thread-stall"
+#define DEFAULT_CONTROL_THREAD_FAULT_FILE "fault-injection-bside-control-thread-stall"
+#define DEFAULT_THREAD_HEARTBEAT_TIMEOUT_SEC 15
+#define EXIT_CODE_VIDEO_THREAD_STALLED 101
+#define EXIT_CODE_CONTROL_THREAD_STALLED 102
+
+typedef struct unix_dgram_client {
+    int fd;
+    char bind_path[108];
+    char dest_path[108];
+    struct sockaddr_un dest_addr;
+    socklen_t dest_len;
+} unix_dgram_client_t;
+
+typedef struct control_bridge_stats {
+    pthread_mutex_t mutex;
+    uint64_t packets_forwarded;
+    uint64_t invalid_packets;
+    uint64_t unix_send_errors;
+    uint64_t reconnect_count;
+    uint32_t server_idle_ms;
+    int ever_connected;
+    int registered;
+    char last_error[256];
+    char last_reconnect_reason[256];
+    kcp_runtime_stats_t transport;
+} control_bridge_stats_t;
+
+typedef struct daemon_state {
+    volatile sig_atomic_t *stop_requested;
+    video_pipeline_config_t video_config;
+    video_pipeline_stats_t video_stats;
+    const char *control_server_addr;
+    const char *control_relay_via;
+    const char *control_bind_ip;
+    const char *control_bind_device;
+    const char *control_peer_id;
+    const char *control_expected_sender;
+    const char *control_unix_socket;
+    int control_server_idle_reconnect_ms;
+    const char *runtime_dir;
+    int heartbeat_timeout_sec;
+    char status_file_path[512];
+    char video_thread_fault_file[512];
+    char control_thread_fault_file[512];
+    atomic_long video_thread_heartbeat_epoch_sec;
+    atomic_long control_thread_heartbeat_epoch_sec;
+    unix_dgram_client_t unix_client;
+    control_bridge_stats_t control_stats;
+} daemon_state_t;
+
+static volatile sig_atomic_t g_stop_requested = 0;
+
+static void handle_signal(int signum) {
+    (void) signum;
+    g_stop_requested = 1;
+}
+
+static int install_signal_handler(int signum) {
+    struct sigaction action;
+
+    memset(&action, 0, sizeof(action));
+    action.sa_handler = handle_signal;
+    action.sa_flags = SA_RESTART;
+    if (sigemptyset(&action.sa_mask) != 0) {
+        return -1;
+    }
+    return sigaction(signum, &action, NULL);
+}
+
+static const char *env_or_default(const char *name, const char *fallback) {
+    const char *value = getenv(name);
+    if (value != NULL && value[0] != '\0') {
+        return value;
+    }
+    return fallback;
+}
+
+static const char *env_first_nonempty(const char *first, const char *second, const char *fallback) {
+    const char *value = getenv(first);
+    if (value != NULL && value[0] != '\0') {
+        return value;
+    }
+    value = getenv(second);
+    if (value != NULL && value[0] != '\0') {
+        return value;
+    }
+    return fallback;
+}
+
+static int env_int_or_default(const char *name, int fallback) {
+    const char *value = getenv(name);
+    int parsed;
+
+    if (value == NULL || value[0] == '\0') {
+        return fallback;
+    }
+    parsed = atoi(value);
+    if (parsed <= 0) {
+        return fallback;
+    }
+    return parsed;
+}
+
+static int64_t realtime_epoch_ms(void) {
+    struct timespec ts;
+
+    clock_gettime(CLOCK_REALTIME, &ts);
+    return (int64_t) ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
+}
+
+static long realtime_epoch_sec(void) {
+    return (long) time(NULL);
+}
+
+static void update_thread_heartbeat(atomic_long *heartbeat) {
+    if (heartbeat == NULL) {
+        return;
+    }
+    atomic_store(heartbeat, realtime_epoch_sec());
+}
+
+static void video_pipeline_heartbeat_progress(void *context) {
+    update_thread_heartbeat((atomic_long *) context);
+}
+
+static int ensure_runtime_dir(const char *runtime_dir) {
+    struct stat st;
+
+    if (runtime_dir == NULL || runtime_dir[0] == '\0') {
+        errno = EINVAL;
+        return -1;
+    }
+    if (stat(runtime_dir, &st) == 0) {
+        if (S_ISDIR(st.st_mode)) {
+            return 0;
+        }
+        errno = ENOTDIR;
+        return -1;
+    }
+    if (errno != ENOENT) {
+        return -1;
+    }
+    if (mkdir(runtime_dir, 0775) != 0 && errno != EEXIST) {
+        return -1;
+    }
+    return 0;
+}
+
+static int path_exists(const char *path) {
+    return path != NULL && path[0] != '\0' && access(path, F_OK) == 0;
+}
+
+static int consume_fault_flag(const char *path) {
+    if (!path_exists(path)) {
+        return 0;
+    }
+    unlink(path);
+    return 1;
+}
+
+static void maybe_inject_thread_stall(daemon_state_t *state, const char *fault_path, const char *thread_name) {
+    if (state == NULL || fault_path == NULL || thread_name == NULL) {
+        return;
+    }
+    if (!consume_fault_flag(fault_path)) {
+        return;
+    }
+    fprintf(
+        stderr,
+        "[b_side_omnid] fault injection requested for %s thread, sleeping past %d second heartbeat timeout\n",
+        thread_name,
+        state->heartbeat_timeout_sec
+    );
+    sleep((unsigned int) state->heartbeat_timeout_sec + 2U);
+}
+
+static int control_bridge_stats_init(control_bridge_stats_t *stats) {
+    int rc;
+    if (stats == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+    memset(stats, 0, sizeof(*stats));
+    rc = pthread_mutex_init(&stats->mutex, NULL);
+    if (rc != 0) {
+        errno = rc;
+        return -1;
+    }
+    return 0;
+}
+
+static void control_bridge_stats_destroy(control_bridge_stats_t *stats) {
+    if (stats == NULL) {
+        return;
+    }
+    pthread_mutex_destroy(&stats->mutex);
+}
+
+static void unix_dgram_client_close(unix_dgram_client_t *client);
+static void control_bridge_stats_snapshot(control_bridge_stats_t *stats, control_bridge_stats_t *out_stats);
+
+static int write_status_json_atomic(const char *path, cJSON *root) {
+    char *json;
+    char temp_path[640];
+    FILE *file;
+    size_t json_len;
+
+    if (path == NULL || root == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    json = cJSON_PrintUnformatted(root);
+    if (json == NULL) {
+        errno = ENOMEM;
+        return -1;
+    }
+
+    snprintf(temp_path, sizeof(temp_path), "%s.tmp.%ld", path, (long) getpid());
+    file = fopen(temp_path, "wb");
+    if (file == NULL) {
+        cJSON_free(json);
+        return -1;
+    }
+
+    json_len = strlen(json);
+    if (fwrite(json, 1, json_len, file) != json_len || fflush(file) != 0) {
+        int saved_errno = errno;
+
+        fclose(file);
+        unlink(temp_path);
+        cJSON_free(json);
+        errno = saved_errno;
+        return -1;
+    }
+    if (fclose(file) != 0) {
+        int saved_errno = errno;
+
+        unlink(temp_path);
+        cJSON_free(json);
+        errno = saved_errno;
+        return -1;
+    }
+    if (rename(temp_path, path) != 0) {
+        int saved_errno = errno;
+
+        unlink(temp_path);
+        cJSON_free(json);
+        errno = saved_errno;
+        return -1;
+    }
+
+    cJSON_free(json);
+    return 0;
+}
+
+static int write_daemon_status_file(daemon_state_t *state) {
+    cJSON *root;
+    video_pipeline_stats_t video_stats;
+    control_bridge_stats_t control_stats;
+    int rc;
+
+    if (state == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+    if (ensure_runtime_dir(state->runtime_dir) != 0) {
+        return -1;
+    }
+
+    memset(&video_stats, 0, sizeof(video_stats));
+    memset(&control_stats, 0, sizeof(control_stats));
+    video_pipeline_stats_snapshot(&state->video_stats, &video_stats);
+    control_bridge_stats_snapshot(&state->control_stats, &control_stats);
+
+    root = cJSON_CreateObject();
+    if (root == NULL) {
+        errno = ENOMEM;
+        return -1;
+    }
+
+    cJSON_AddNumberToObject(root, "updated_at_epoch_ms", (double) realtime_epoch_ms());
+    cJSON_AddNumberToObject(root, "pid", (double) getpid());
+    cJSON_AddNumberToObject(root, "video_thread_heartbeat_epoch_ms", (double) atomic_load(&state->video_thread_heartbeat_epoch_sec) * 1000.0);
+    cJSON_AddNumberToObject(root, "control_thread_heartbeat_epoch_ms", (double) atomic_load(&state->control_thread_heartbeat_epoch_sec) * 1000.0);
+    cJSON_AddBoolToObject(root, "video_connected", video_stats.connected != 0);
+    cJSON_AddNumberToObject(root, "video_frames_sent", (double) video_stats.frames_sent);
+    cJSON_AddNumberToObject(root, "video_send_errors", (double) video_stats.send_errors);
+    cJSON_AddNumberToObject(root, "video_backlog_resets", (double) video_stats.backlog_resets);
+    cJSON_AddStringToObject(root, "video_last_error", video_stats.last_error);
+    cJSON_AddBoolToObject(root, "control_registered", control_stats.registered != 0);
+    cJSON_AddNumberToObject(root, "control_reconnect_count", (double) control_stats.reconnect_count);
+    cJSON_AddNumberToObject(root, "control_unix_send_errors", (double) control_stats.unix_send_errors);
+    cJSON_AddStringToObject(root, "control_last_error", control_stats.last_error);
+
+    rc = write_status_json_atomic(state->status_file_path, root);
+    cJSON_Delete(root);
+    return rc;
+}
+
+static int thread_heartbeat_expired(atomic_long *heartbeat, int timeout_sec, long now_sec) {
+    long heartbeat_sec;
+
+    if (heartbeat == NULL || timeout_sec <= 0) {
+        return 0;
+    }
+    heartbeat_sec = atomic_load(heartbeat);
+    if (heartbeat_sec <= 0) {
+        return 0;
+    }
+    return now_sec - heartbeat_sec > timeout_sec;
+}
+
+static void exit_if_thread_stalled(daemon_state_t *state) {
+    long now_sec;
+
+    if (state == NULL || state->heartbeat_timeout_sec <= 0) {
+        return;
+    }
+    now_sec = realtime_epoch_sec();
+    if (thread_heartbeat_expired(&state->video_thread_heartbeat_epoch_sec, state->heartbeat_timeout_sec, now_sec)) {
+        fprintf(stderr, "[b_side_omnid] video thread heartbeat stalled for more than %d seconds\n", state->heartbeat_timeout_sec);
+        fflush(stderr);
+        exit(EXIT_CODE_VIDEO_THREAD_STALLED);
+    }
+    if (thread_heartbeat_expired(&state->control_thread_heartbeat_epoch_sec, state->heartbeat_timeout_sec, now_sec)) {
+        fprintf(stderr, "[b_side_omnid] control thread heartbeat stalled for more than %d seconds\n", state->heartbeat_timeout_sec);
+        fflush(stderr);
+        exit(EXIT_CODE_CONTROL_THREAD_STALLED);
+    }
+}
+
+static void control_bridge_set_error(control_bridge_stats_t *stats, const char *message) {
+    if (stats == NULL) {
+        return;
+    }
+    pthread_mutex_lock(&stats->mutex);
+    snprintf(stats->last_error, sizeof(stats->last_error), "%s", message == NULL ? "" : message);
+    pthread_mutex_unlock(&stats->mutex);
+}
+
+static void control_bridge_set_reconnect_reason(control_bridge_stats_t *stats, const char *message) {
+    if (stats == NULL) {
+        return;
+    }
+    pthread_mutex_lock(&stats->mutex);
+    snprintf(stats->last_reconnect_reason, sizeof(stats->last_reconnect_reason), "%s", message == NULL ? "" : message);
+    pthread_mutex_unlock(&stats->mutex);
+}
+
+static void control_bridge_set_errno_error(control_bridge_stats_t *stats, const char *prefix) {
+    char buffer[256];
+    int saved_errno = errno;
+
+    snprintf(
+        buffer,
+        sizeof(buffer),
+        "%s: %s (errno=%d)",
+        prefix == NULL ? "control bridge error" : prefix,
+        saved_errno != 0 ? strerror(saved_errno) : "unknown error",
+        saved_errno
+    );
+    control_bridge_set_error(stats, buffer);
+}
+
+static void control_bridge_stats_snapshot(control_bridge_stats_t *stats, control_bridge_stats_t *out_stats) {
+    if (stats == NULL || out_stats == NULL) {
+        return;
+    }
+    memset(out_stats, 0, sizeof(*out_stats));
+    pthread_mutex_lock(&stats->mutex);
+    out_stats->packets_forwarded = stats->packets_forwarded;
+    out_stats->invalid_packets = stats->invalid_packets;
+    out_stats->unix_send_errors = stats->unix_send_errors;
+    out_stats->reconnect_count = stats->reconnect_count;
+    out_stats->server_idle_ms = stats->server_idle_ms;
+    out_stats->registered = stats->registered;
+    snprintf(out_stats->last_error, sizeof(out_stats->last_error), "%s", stats->last_error);
+    snprintf(out_stats->last_reconnect_reason, sizeof(out_stats->last_reconnect_reason), "%s", stats->last_reconnect_reason);
+    out_stats->transport = stats->transport;
+    pthread_mutex_unlock(&stats->mutex);
+}
+
+static int control_server_error_requires_reconnect(const char *message) {
+    if (message == NULL || message[0] == '\0') {
+        return 0;
+    }
+    return strstr(message, "not registered") != NULL
+        || strstr(message, "first message must be register") != NULL
+        || strstr(message, "peer replaced") != NULL
+        || strstr(message, "timed out waiting for server_register_ok") != NULL;
+}
+
+static void control_message_body_to_cstr(const message_t *msg, char *buffer, size_t buffer_len) {
+    size_t copy_len;
+
+    if (buffer == NULL || buffer_len == 0) {
+        return;
+    }
+    buffer[0] = '\0';
+    if (msg == NULL || msg->body == NULL || msg->body_len == 0) {
+        return;
+    }
+    copy_len = msg->body_len < (buffer_len - 1U) ? msg->body_len : (buffer_len - 1U);
+    memcpy(buffer, msg->body, copy_len);
+    buffer[copy_len] = '\0';
+}
+
+static int unix_dgram_client_init(unix_dgram_client_t *client, const char *dest_path) {
+    struct sockaddr_un bind_addr;
+    pid_t pid;
+
+    if (client == NULL || dest_path == NULL || dest_path[0] == '\0') {
+        errno = EINVAL;
+        return -1;
+    }
+
+    memset(client, 0, sizeof(*client));
+    client->fd = socket(AF_UNIX, SOCK_DGRAM, 0);
+    if (client->fd < 0) {
+        return -1;
+    }
+
+    memset(&bind_addr, 0, sizeof(bind_addr));
+    bind_addr.sun_family = AF_UNIX;
+    pid = getpid();
+    snprintf(client->bind_path, sizeof(client->bind_path), "/tmp/omnisocket-b-side-cmd-client-%ld.sock", (long) pid);
+    unlink(client->bind_path);
+    snprintf(bind_addr.sun_path, sizeof(bind_addr.sun_path), "%s", client->bind_path);
+    if (bind(client->fd, (const struct sockaddr *) &bind_addr, sizeof(bind_addr)) != 0) {
+        close(client->fd);
+        unlink(client->bind_path);
+        client->fd = -1;
+        return -1;
+    }
+
+    memset(&client->dest_addr, 0, sizeof(client->dest_addr));
+    client->dest_addr.sun_family = AF_UNIX;
+    snprintf(client->dest_path, sizeof(client->dest_path), "%s", dest_path);
+    snprintf(client->dest_addr.sun_path, sizeof(client->dest_addr.sun_path), "%s", dest_path);
+    client->dest_len = (socklen_t) sizeof(client->dest_addr);
+    return 0;
+}
+
+static int unix_dgram_client_send(unix_dgram_client_t *client, const void *data, size_t len) {
+    ssize_t written;
+    if (client == NULL || client->fd < 0 || (data == NULL && len > 0)) {
+        errno = EINVAL;
+        return -1;
+    }
+    written = sendto(client->fd, data, len, 0, (const struct sockaddr *) &client->dest_addr, client->dest_len);
+    if (written < 0 || (size_t) written != len) {
+        if (written >= 0) {
+            errno = EIO;
+        }
+        return -1;
+    }
+    return 0;
+}
+
+static int unix_dgram_client_reopen(unix_dgram_client_t *client) {
+    char dest_path[sizeof(client->dest_path)];
+
+    if (client == NULL || client->dest_path[0] == '\0') {
+        errno = EINVAL;
+        return -1;
+    }
+    snprintf(dest_path, sizeof(dest_path), "%s", client->dest_path);
+    unix_dgram_client_close(client);
+    return unix_dgram_client_init(client, dest_path);
+}
+
+static int unix_dgram_client_should_reopen(int error_code) {
+    return error_code == ENOENT || error_code == ECONNREFUSED || error_code == EBADF || error_code == ENOTCONN;
+}
+
+static void unix_dgram_client_close(unix_dgram_client_t *client) {
+    if (client == NULL) {
+        return;
+    }
+    if (client->fd >= 0) {
+        close(client->fd);
+        client->fd = -1;
+    }
+    if (client->bind_path[0] != '\0') {
+        unlink(client->bind_path);
+        client->bind_path[0] = '\0';
+    }
+}
+
+static void *video_thread_main(void *arg) {
+    daemon_state_t *state = (daemon_state_t *) arg;
+
+    while (!*state->stop_requested) {
+        update_thread_heartbeat(&state->video_thread_heartbeat_epoch_sec);
+        maybe_inject_thread_stall(state, state->video_thread_fault_file, "video");
+        int video_rc = video_pipeline_run(&state->video_config, &state->video_stats, state->stop_requested);
+        update_thread_heartbeat(&state->video_thread_heartbeat_epoch_sec);
+
+        if (video_rc == 0) {
+            break;
+        }
+        if (video_rc == VIDEO_PIPELINE_RUN_RETRY_IMMEDIATE) {
+            continue;
+        }
+        if (!*state->stop_requested) {
+            sleep(1);
+        }
+    }
+    return NULL;
+}
+
+static void *control_thread_main(void *arg) {
+    daemon_state_t *state = (daemon_state_t *) arg;
+
+    while (!*state->stop_requested) {
+        kcp_conn_options_t options;
+        kcp_client_t *client = NULL;
+        int reconnect_immediately = 0;
+
+        update_thread_heartbeat(&state->control_thread_heartbeat_epoch_sec);
+        maybe_inject_thread_stall(state, state->control_thread_fault_file, "control");
+        kcp_conn_options_set_control_defaults(&options);
+        client = kcp_client_dial_with_options(
+            state->control_server_addr,
+            state->control_relay_via,
+            state->control_peer_id,
+            state->control_bind_ip,
+            state->control_bind_device,
+            &options,
+            NULL,
+            NULL,
+            NULL,
+            KCP_DEFAULT_STATS_INTERVAL_MS
+        );
+        if (client == NULL) {
+            control_bridge_set_errno_error(&state->control_stats, "failed to connect control session");
+            sleep(1);
+            continue;
+        }
+
+        {
+            kcp_client_state_t client_state;
+
+            memset(&client_state, 0, sizeof(client_state));
+            kcp_client_state_snapshot(client, &client_state);
+            pthread_mutex_lock(&state->control_stats.mutex);
+            if (state->control_stats.ever_connected) {
+                state->control_stats.reconnect_count += 1;
+            } else {
+                state->control_stats.ever_connected = 1;
+            }
+            state->control_stats.registered = client_state.registered;
+            state->control_stats.server_idle_ms = client_state.server_idle_ms;
+            state->control_stats.last_reconnect_reason[0] = '\0';
+            snprintf(state->control_stats.last_error, sizeof(state->control_stats.last_error), "%s", client_state.last_server_error);
+            kcp_client_runtime_stats_snapshot(client, &state->control_stats.transport);
+            pthread_mutex_unlock(&state->control_stats.mutex);
+        }
+
+        while (!*state->stop_requested) {
+            message_t msg;
+            int rc;
+            kcp_client_state_t client_state;
+
+            update_thread_heartbeat(&state->control_thread_heartbeat_epoch_sec);
+            protocol_message_init(&msg);
+            rc = kcp_client_receive_timed(client, &msg, 100);
+            update_thread_heartbeat(&state->control_thread_heartbeat_epoch_sec);
+            if (rc == 1) {
+                char reconnect_reason[256];
+
+                protocol_message_clear(&msg);
+                memset(&client_state, 0, sizeof(client_state));
+                kcp_client_state_snapshot(client, &client_state);
+                pthread_mutex_lock(&state->control_stats.mutex);
+                state->control_stats.registered = client_state.registered;
+                state->control_stats.server_idle_ms = client_state.server_idle_ms;
+                snprintf(state->control_stats.last_error, sizeof(state->control_stats.last_error), "%s", client_state.last_server_error);
+                kcp_client_runtime_stats_snapshot(client, &state->control_stats.transport);
+                pthread_mutex_unlock(&state->control_stats.mutex);
+                if (!client_state.registered) {
+                    snprintf(reconnect_reason, sizeof(reconnect_reason), "control session stale: server reported unregistered");
+                } else if (
+                    state->control_server_idle_reconnect_ms > 0
+                    && client_state.server_idle_ms >= (uint32_t) state->control_server_idle_reconnect_ms
+                ) {
+                    snprintf(
+                        reconnect_reason,
+                        sizeof(reconnect_reason),
+                        "control session stale: server idle timeout (%u ms >= %d ms)",
+                        client_state.server_idle_ms,
+                        state->control_server_idle_reconnect_ms
+                    );
+                } else if (control_server_error_requires_reconnect(client_state.last_server_error)) {
+                    snprintf(
+                        reconnect_reason,
+                        sizeof(reconnect_reason),
+                        "control session stale: server error %.180s",
+                        client_state.last_server_error
+                    );
+                } else {
+                    reconnect_reason[0] = '\0';
+                }
+                if (reconnect_reason[0] != '\0') {
+                    control_bridge_set_error(&state->control_stats, reconnect_reason);
+                    control_bridge_set_reconnect_reason(&state->control_stats, reconnect_reason);
+                    fprintf(stderr, "[b_side_omnid] %s\n", reconnect_reason);
+                    reconnect_immediately = 1;
+                    break;
+                }
+                continue;
+            }
+            if (rc != 0) {
+                memset(&client_state, 0, sizeof(client_state));
+                kcp_client_state_snapshot(client, &client_state);
+                pthread_mutex_lock(&state->control_stats.mutex);
+                state->control_stats.registered = client_state.registered;
+                state->control_stats.server_idle_ms = client_state.server_idle_ms;
+                kcp_client_runtime_stats_snapshot(client, &state->control_stats.transport);
+                pthread_mutex_unlock(&state->control_stats.mutex);
+                if (client_state.last_server_error[0] != '\0') {
+                    control_bridge_set_error(&state->control_stats, client_state.last_server_error);
+                    if (control_server_error_requires_reconnect(client_state.last_server_error)) {
+                        control_bridge_set_reconnect_reason(&state->control_stats, client_state.last_server_error);
+                        reconnect_immediately = 1;
+                    }
+                } else {
+                    control_bridge_set_errno_error(&state->control_stats, "control receive loop stopped");
+                }
+                protocol_message_clear(&msg);
+                break;
+            }
+
+            if (msg.type == MSG_TYPE_ERROR && strcmp(msg.from, SERVER_PEER_ID) == 0) {
+                char server_error[256];
+
+                control_message_body_to_cstr(&msg, server_error, sizeof(server_error));
+                control_bridge_set_error(&state->control_stats, server_error);
+                if (control_server_error_requires_reconnect(server_error)) {
+                    char reconnect_reason[256];
+
+                    snprintf(reconnect_reason, sizeof(reconnect_reason), "control session stale: server error %.180s", server_error);
+                    control_bridge_set_reconnect_reason(&state->control_stats, reconnect_reason);
+                    fprintf(stderr, "[b_side_omnid] %s\n", reconnect_reason);
+                    reconnect_immediately = 1;
+                    protocol_message_clear(&msg);
+                    break;
+                }
+                protocol_message_clear(&msg);
+                continue;
+            }
+            if (state->control_expected_sender[0] != '\0' && strcmp(msg.from, state->control_expected_sender) != 0) {
+                pthread_mutex_lock(&state->control_stats.mutex);
+                state->control_stats.invalid_packets += 1;
+                pthread_mutex_unlock(&state->control_stats.mutex);
+                protocol_message_clear(&msg);
+                continue;
+            }
+
+            if (msg.type != MSG_TYPE_BINARY || msg.body_len != OMNI_CONTROL_PACKET_SIZE) {
+                pthread_mutex_lock(&state->control_stats.mutex);
+                state->control_stats.invalid_packets += 1;
+                pthread_mutex_unlock(&state->control_stats.mutex);
+                protocol_message_clear(&msg);
+                continue;
+            }
+
+            if (unix_dgram_client_send(&state->unix_client, msg.body, msg.body_len) != 0) {
+                int send_errno = errno;
+                int recovered = 0;
+
+                if (unix_dgram_client_should_reopen(send_errno) && unix_dgram_client_reopen(&state->unix_client) == 0) {
+                    recovered = unix_dgram_client_send(&state->unix_client, msg.body, msg.body_len) == 0;
+                }
+                if (recovered) {
+                    memset(&client_state, 0, sizeof(client_state));
+                    kcp_client_state_snapshot(client, &client_state);
+                    pthread_mutex_lock(&state->control_stats.mutex);
+                    state->control_stats.packets_forwarded += 1;
+                    state->control_stats.registered = client_state.registered;
+                    state->control_stats.server_idle_ms = client_state.server_idle_ms;
+                    kcp_client_runtime_stats_snapshot(client, &state->control_stats.transport);
+                    pthread_mutex_unlock(&state->control_stats.mutex);
+                    protocol_message_clear(&msg);
+                    continue;
+                }
+                errno = send_errno;
+                pthread_mutex_lock(&state->control_stats.mutex);
+                state->control_stats.unix_send_errors += 1;
+                pthread_mutex_unlock(&state->control_stats.mutex);
+                control_bridge_set_errno_error(&state->control_stats, "failed to forward command to unix socket");
+                protocol_message_clear(&msg);
+                continue;
+            }
+
+            memset(&client_state, 0, sizeof(client_state));
+            kcp_client_state_snapshot(client, &client_state);
+            pthread_mutex_lock(&state->control_stats.mutex);
+            state->control_stats.packets_forwarded += 1;
+            state->control_stats.registered = client_state.registered;
+            state->control_stats.server_idle_ms = client_state.server_idle_ms;
+            kcp_client_runtime_stats_snapshot(client, &state->control_stats.transport);
+            pthread_mutex_unlock(&state->control_stats.mutex);
+            protocol_message_clear(&msg);
+        }
+
+        pthread_mutex_lock(&state->control_stats.mutex);
+        state->control_stats.registered = 0;
+        state->control_stats.server_idle_ms = 0;
+        pthread_mutex_unlock(&state->control_stats.mutex);
+        kcp_client_close(client);
+        kcp_client_free(client);
+        if (!*state->stop_requested && !reconnect_immediately) {
+            sleep(1);
+        }
+    }
+
+    return NULL;
+}
+
+static void print_stats(daemon_state_t *state) {
+    video_pipeline_stats_t video_stats;
+    control_bridge_stats_t control_stats;
+
+    memset(&video_stats, 0, sizeof(video_stats));
+    memset(&control_stats, 0, sizeof(control_stats));
+    video_pipeline_stats_snapshot(&state->video_stats, &video_stats);
+    control_bridge_stats_snapshot(&state->control_stats, &control_stats);
+
+    fprintf(
+        stderr,
+        "[b_side_omnid] video registered=%d frames=%llu bytes=%llu drops=%llu resets=%llu backlog=%u reason=%s srtt=%dms | control registered=%d idle=%ums reconnects=%llu forwarded=%llu invalid=%llu unix_err=%llu srtt=%dms last_reconnect=%s\n",
+        video_stats.connected,
+        (unsigned long long) video_stats.frames_sent,
+        (unsigned long long) video_stats.bytes_sent,
+        (unsigned long long) video_stats.backpressure_drops,
+        (unsigned long long) video_stats.backlog_resets,
+        video_stats.last_backlog_segments,
+        video_stats.last_backlog_reason[0] == '\0' ? "-" : video_stats.last_backlog_reason,
+        video_stats.transport.srtt_ms,
+        control_stats.registered,
+        control_stats.server_idle_ms,
+        (unsigned long long) control_stats.reconnect_count,
+        (unsigned long long) control_stats.packets_forwarded,
+        (unsigned long long) control_stats.invalid_packets,
+        (unsigned long long) control_stats.unix_send_errors,
+        control_stats.transport.srtt_ms,
+        control_stats.last_reconnect_reason[0] == '\0' ? "-" : control_stats.last_reconnect_reason
+    );
+}
+
+int main(void) {
+    daemon_state_t state;
+    pthread_t video_thread;
+    pthread_t control_thread;
+    long initial_heartbeat;
+
+    memset(&state, 0, sizeof(state));
+    state.stop_requested = &g_stop_requested;
+
+    video_pipeline_config_init(&state.video_config);
+    video_pipeline_config_load_env(&state.video_config);
+    state.control_server_addr = env_first_nonempty("OMNI_CONTROL_SERVER_ADDR", "OMNISOCKET_SERVER_ADDR", "");
+    state.control_relay_via = env_first_nonempty("OMNI_CONTROL_RELAY_VIA", "OMNISOCKET_RELAY_VIA", "");
+    state.control_bind_ip = env_first_nonempty("OMNI_CONTROL_BIND_IP", "OMNISOCKET_BIND_IP", "");
+    state.control_bind_device = env_first_nonempty("OMNI_CONTROL_BIND_DEVICE", "OMNISOCKET_BIND_DEVICE", "");
+    state.control_peer_id = env_or_default("OMNI_CONTROL_PEER_ID", CONTROL_DEFAULT_PEER_ID);
+    state.control_expected_sender = env_or_default("OMNI_CONTROL_EXPECTED_SENDER", CONTROL_DEFAULT_EXPECTED_SENDER);
+    state.control_unix_socket = env_or_default("OMNI_CONTROL_UNIX_SOCKET_PATH", CONTROL_DEFAULT_UNIX_SOCKET);
+    state.runtime_dir = env_or_default("BLITZ_RUNTIME_DIR", DEFAULT_RUNTIME_DIR);
+    state.heartbeat_timeout_sec = env_int_or_default(
+        "BLITZ_OMNID_THREAD_HEARTBEAT_TIMEOUT_SEC",
+        DEFAULT_THREAD_HEARTBEAT_TIMEOUT_SEC
+    );
+    state.video_config.progress_callback = video_pipeline_heartbeat_progress;
+    state.video_config.progress_context = &state.video_thread_heartbeat_epoch_sec;
+    state.control_server_idle_reconnect_ms = env_int_or_default(
+        "OMNI_CONTROL_SERVER_IDLE_RECONNECT_MS",
+        CONTROL_DEFAULT_SERVER_IDLE_RECONNECT_MS
+    );
+    snprintf(state.status_file_path, sizeof(state.status_file_path), "%s/%s", state.runtime_dir, DEFAULT_STATUS_FILE_NAME);
+    snprintf(
+        state.video_thread_fault_file,
+        sizeof(state.video_thread_fault_file),
+        "%s/%s",
+        state.runtime_dir,
+        DEFAULT_VIDEO_THREAD_FAULT_FILE
+    );
+    snprintf(
+        state.control_thread_fault_file,
+        sizeof(state.control_thread_fault_file),
+        "%s/%s",
+        state.runtime_dir,
+        DEFAULT_CONTROL_THREAD_FAULT_FILE
+    );
+    initial_heartbeat = realtime_epoch_sec();
+    atomic_init(&state.video_thread_heartbeat_epoch_sec, initial_heartbeat);
+    atomic_init(&state.control_thread_heartbeat_epoch_sec, initial_heartbeat);
+
+    if (state.video_config.server_addr == NULL || state.video_config.server_addr[0] == '\0' ||
+        state.control_server_addr == NULL || state.control_server_addr[0] == '\0') {
+        fprintf(stderr, "OMNISOCKET_SERVER_ADDR (or session-specific overrides) is required\n");
+        return 1;
+    }
+
+    if (video_pipeline_stats_init(&state.video_stats) != 0) {
+        perror("video_pipeline_stats_init");
+        return 1;
+    }
+    if (control_bridge_stats_init(&state.control_stats) != 0) {
+        perror("control_bridge_stats_init");
+        video_pipeline_stats_destroy(&state.video_stats);
+        return 1;
+    }
+    if (unix_dgram_client_init(&state.unix_client, state.control_unix_socket) != 0) {
+        perror("unix_dgram_client_init");
+        control_bridge_stats_destroy(&state.control_stats);
+        video_pipeline_stats_destroy(&state.video_stats);
+        return 1;
+    }
+
+    fprintf(
+        stderr,
+        "[b_side_omnid] control forwarding target is unix_dgram://%s\n",
+        state.control_unix_socket
+    );
+
+    if (install_signal_handler(SIGINT) != 0 || install_signal_handler(SIGTERM) != 0) {
+        perror("install_signal_handler");
+        unix_dgram_client_close(&state.unix_client);
+        control_bridge_stats_destroy(&state.control_stats);
+        video_pipeline_stats_destroy(&state.video_stats);
+        return 1;
+    }
+
+    if (pthread_create(&video_thread, NULL, video_thread_main, &state) != 0) {
+        perror("pthread_create(video_thread)");
+        unix_dgram_client_close(&state.unix_client);
+        control_bridge_stats_destroy(&state.control_stats);
+        video_pipeline_stats_destroy(&state.video_stats);
+        return 1;
+    }
+    if (pthread_create(&control_thread, NULL, control_thread_main, &state) != 0) {
+        perror("pthread_create(control_thread)");
+        g_stop_requested = 1;
+        pthread_join(video_thread, NULL);
+        unix_dgram_client_close(&state.unix_client);
+        control_bridge_stats_destroy(&state.control_stats);
+        video_pipeline_stats_destroy(&state.video_stats);
+        return 1;
+    }
+
+    while (!g_stop_requested) {
+        sleep(1);
+        print_stats(&state);
+        if (write_daemon_status_file(&state) != 0) {
+            fprintf(stderr, "[b_side_omnid] failed to write status file %s: %s\n", state.status_file_path, strerror(errno));
+        }
+        exit_if_thread_stalled(&state);
+    }
+
+    pthread_join(video_thread, NULL);
+    pthread_join(control_thread, NULL);
+    unix_dgram_client_close(&state.unix_client);
+    control_bridge_stats_destroy(&state.control_stats);
+    video_pipeline_stats_destroy(&state.video_stats);
+    return 0;
+}

cmd/b_side_video_sender.c

@@ -1,860 +0,0 @@
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <linux/videodev2.h>
-#include <pthread.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/select.h>
-#include <time.h>
-#include <unistd.h>
-
-#include <libavcodec/avcodec.h>
-#include <libavutil/avutil.h>
-#include <libavutil/imgutils.h>
-#include <libavutil/opt.h>
-#include <libswscale/swscale.h>
-
-#include "cJSON.h"
-#include "peer_kcp_client.h"
-
-#define WORKER_CONTROL_FD 3
-#define WORKER_TELEMETRY_FD 4
-#define NUM_BUFFERS 4
-#define CLEAR(x) memset(&(x), 0, sizeof(x))
-
-#define VIDEO_SERVER_ADDR_ENV "OMNI_VIDEO_SERVER_ADDR"
-#define VIDEO_RELAY_ADDR_ENV "OMNI_VIDEO_RELAY_VIA"
-#define VIDEO_BIND_IP_ENV "OMNI_VIDEO_BIND_IP"
-#define VIDEO_BIND_DEVICE_ENV "OMNI_VIDEO_BIND_DEVICE"
-#define VIDEO_PEER_ID_ENV "OMNI_VIDEO_PEER_ID"
-#define VIDEO_TARGET_PEER_ENV "OMNI_VIDEO_TARGET_PEER"
-#define VIDEO_DEVICE_ENV "OMNI_VIDEO_DEVICE"
-#define VIDEO_CAPTURE_WIDTH_ENV "OMNI_VIDEO_CAPTURE_WIDTH"
-#define VIDEO_CAPTURE_HEIGHT_ENV "OMNI_VIDEO_CAPTURE_HEIGHT"
-#define VIDEO_OUTPUT_WIDTH_ENV "OMNI_VIDEO_OUTPUT_WIDTH"
-#define VIDEO_OUTPUT_HEIGHT_ENV "OMNI_VIDEO_OUTPUT_HEIGHT"
-#define VIDEO_FPS_ENV "OMNI_VIDEO_FPS"
-#define VIDEO_JPEG_QSCALE_ENV "OMNI_VIDEO_JPEG_QSCALE"
-#define VIDEO_MAX_FRAME_BYTES_ENV "OMNI_VIDEO_MAX_FRAME_BYTES"
-#define VIDEO_STATS_INTERVAL_ENV "OMNI_VIDEO_STATS_INTERVAL_MS"
-
-typedef struct {
-    void *start;
-    size_t length;
-} Buffer;
-
-typedef struct {
-    char server_addr[OMNI_MAX_ADDR_TEXT];
-    char relay_addr[OMNI_MAX_ADDR_TEXT];
-    char bind_ip[OMNI_MAX_ADDR_TEXT];
-    char bind_device[128];
-    char peer_id[OMNI_MAX_PEER_ID];
-    char target_peer[OMNI_MAX_PEER_ID];
-    char video_device[256];
-    int capture_width;
-    int capture_height;
-    int output_width;
-    int output_height;
-    int initial_fps;
-    int initial_qscale;
-    int initial_max_frame_bytes;
-    int stats_interval_ms;
-} worker_config_t;
-
-typedef struct {
-    pthread_mutex_t lock;
-    pthread_mutex_t telemetry_lock;
-    FILE *telemetry_stream;
-    int target_fps;
-    int jpeg_quality_qscale;
-    int max_frame_bytes;
-    bool shutdown_requested;
-} runtime_state_t;
-
-typedef struct {
-    kcp_client_t *client;
-    char target_peer[OMNI_MAX_PEER_ID];
-} video_sender_t;
-
-typedef struct {
-    FILE *control_stream;
-    runtime_state_t *runtime;
-} control_thread_args_t;
-
-static volatile sig_atomic_t g_signal_stop = 0;
-
-static double monotonic_ms(void) {
-    struct timespec ts;
-    clock_gettime(CLOCK_MONOTONIC, &ts);
-    return (double) ts.tv_sec * 1000.0 + (double) ts.tv_nsec / 1000000.0;
-}
-
-static int64_t realtime_ms(void) {
-    struct timespec ts;
-    clock_gettime(CLOCK_REALTIME, &ts);
-    return (int64_t) ts.tv_sec * 1000 + (int64_t) ts.tv_nsec / 1000000;
-}
-
-static int env_as_int(const char *name, int fallback) {
-    const char *raw = getenv(name);
-    char *endptr = NULL;
-    long value;
-
-    if (raw == NULL || raw[0] == '\0') {
-        return fallback;
-    }
-    errno = 0;
-    value = strtol(raw, &endptr, 10);
-    if (errno != 0 || endptr == raw || (endptr != NULL && *endptr != '\0')) {
-        return fallback;
-    }
-    return (int) value;
-}
-
-static const char *env_or_default(const char *name, const char *fallback) {
-    const char *value = getenv(name);
-    if (value != NULL && value[0] != '\0') {
-        return value;
-    }
-    return fallback;
-}
-
-static void handle_signal(int signum) {
-    (void) signum;
-    g_signal_stop = 1;
-}
-
-static void runtime_set_shutdown(runtime_state_t *runtime, bool shutdown_requested) {
-    pthread_mutex_lock(&runtime->lock);
-    runtime->shutdown_requested = shutdown_requested;
-    pthread_mutex_unlock(&runtime->lock);
-}
-
-static bool runtime_should_stop(runtime_state_t *runtime) {
-    bool shutdown_requested;
-
-    pthread_mutex_lock(&runtime->lock);
-    shutdown_requested = runtime->shutdown_requested;
-    pthread_mutex_unlock(&runtime->lock);
-    return g_signal_stop != 0 || shutdown_requested;
-}
-
-static void runtime_get_profile(runtime_state_t *runtime, int *fps, int *qscale, int *max_frame_bytes) {
-    pthread_mutex_lock(&runtime->lock);
-    *fps = runtime->target_fps;
-    *qscale = runtime->jpeg_quality_qscale;
-    *max_frame_bytes = runtime->max_frame_bytes;
-    pthread_mutex_unlock(&runtime->lock);
-}
-
-static void runtime_set_profile(runtime_state_t *runtime, int fps, int qscale, int max_frame_bytes) {
-    pthread_mutex_lock(&runtime->lock);
-    if (fps > 0) {
-        runtime->target_fps = fps;
-    }
-    if (qscale > 0) {
-        runtime->jpeg_quality_qscale = qscale;
-    }
-    if (max_frame_bytes > 0) {
-        runtime->max_frame_bytes = max_frame_bytes;
-    }
-    pthread_mutex_unlock(&runtime->lock);
-}
-
-static void telemetry_write_line(runtime_state_t *runtime, const char *line) {
-    pthread_mutex_lock(&runtime->telemetry_lock);
-    if (runtime->telemetry_stream != NULL) {
-        fputs(line, runtime->telemetry_stream);
-        fputc('\n', runtime->telemetry_stream);
-        fflush(runtime->telemetry_stream);
-    }
-    pthread_mutex_unlock(&runtime->telemetry_lock);
-}
-
-static void telemetry_write_frame_stat(
-    runtime_state_t *runtime,
-    int frame_bytes,
-    int encode_us,
-    bool sent,
-    const char *drop_reason
-) {
-    char line[512];
-    int written;
-
-    written = snprintf(
-        line,
-        sizeof(line),
-        "{\"type\":\"frame_stat\",\"frame_bytes\":%d,\"encode_us\":%d,"
-        "\"sent\":%s,\"drop_reason\":\"%s\",\"ts_unix_ms\":%" PRId64 "}",
-        frame_bytes,
-        encode_us,
-        sent ? "true" : "false",
-        drop_reason != NULL ? drop_reason : "",
-        realtime_ms());
-    if (written > 0 && written < (int) sizeof(line)) {
-        telemetry_write_line(runtime, line);
-    }
-}
-
-static void telemetry_write_kcp_metrics(runtime_state_t *runtime, const kcp_conn_metrics_t *metrics) {
-    char line[1024];
-    int written;
-
-    written = snprintf(
-        line,
-        sizeof(line),
-        "{\"type\":\"kcp_metrics\",\"connected\":%d,\"srtt_ms\":%d,\"srttvar_ms\":%d,"
-        "\"rto_ms\":%u,\"bytes_sent\":%" PRIu64 ",\"bytes_received\":%" PRIu64 ","
-        "\"out_pkts\":%" PRIu64 ",\"out_segs\":%" PRIu64 ",\"retrans_segs\":%" PRIu64 ","
-        "\"fast_retrans_segs\":%" PRIu64 ",\"early_retrans_segs\":%" PRIu64 ","
-        "\"lost_segs\":%" PRIu64 ",\"ring_buffer_snd_queue\":%" PRIu64 ","
-        "\"ring_buffer_snd_buffer\":%" PRIu64 ",\"ts_unix_ms\":%" PRId64 "}",
-        metrics->connected,
-        metrics->srtt_ms,
-        metrics->srttvar_ms,
-        metrics->rto_ms,
-        metrics->bytes_sent,
-        metrics->bytes_received,
-        metrics->out_pkts,
-        metrics->out_segs,
-        metrics->retrans_segs,
-        metrics->fast_retrans_segs,
-        metrics->early_retrans_segs,
-        metrics->lost_segs,
-        metrics->ring_buffer_snd_queue,
-        metrics->ring_buffer_snd_buffer,
-        realtime_ms());
-    if (written > 0 && written < (int) sizeof(line)) {
-        telemetry_write_line(runtime, line);
-    }
-}
-
-static int load_worker_config(worker_config_t *cfg) {
-    const char *server_addr = getenv(VIDEO_SERVER_ADDR_ENV);
-
-    if (cfg == NULL) {
-        errno = EINVAL;
-        return -1;
-    }
-    if (server_addr == NULL || server_addr[0] == '\0') {
-        fprintf(stderr, "%s is required\n", VIDEO_SERVER_ADDR_ENV);
-        errno = EINVAL;
-        return -1;
-    }
-
-    CLEAR(*cfg);
-    snprintf(cfg->server_addr, sizeof(cfg->server_addr), "%s", server_addr);
-    snprintf(cfg->relay_addr, sizeof(cfg->relay_addr), "%s", env_or_default(VIDEO_RELAY_ADDR_ENV, ""));
-    snprintf(cfg->bind_ip, sizeof(cfg->bind_ip), "%s", env_or_default(VIDEO_BIND_IP_ENV, ""));
-    snprintf(cfg->bind_device, sizeof(cfg->bind_device), "%s", env_or_default(VIDEO_BIND_DEVICE_ENV, ""));
-    snprintf(cfg->peer_id, sizeof(cfg->peer_id), "%s", env_or_default(VIDEO_PEER_ID_ENV, "peer-b-video"));
-    snprintf(cfg->target_peer, sizeof(cfg->target_peer), "%s", env_or_default(VIDEO_TARGET_PEER_ENV, "peer-a-video"));
-    snprintf(cfg->video_device, sizeof(cfg->video_device), "%s", env_or_default(VIDEO_DEVICE_ENV, "/dev/video0"));
-
-    cfg->capture_width = env_as_int(VIDEO_CAPTURE_WIDTH_ENV, 1280);
-    cfg->capture_height = env_as_int(VIDEO_CAPTURE_HEIGHT_ENV, 720);
-    cfg->output_width = env_as_int(VIDEO_OUTPUT_WIDTH_ENV, 640);
-    cfg->output_height = env_as_int(VIDEO_OUTPUT_HEIGHT_ENV, 360);
-    cfg->initial_fps = env_as_int(VIDEO_FPS_ENV, 10);
-    cfg->initial_qscale = env_as_int(VIDEO_JPEG_QSCALE_ENV, 8);
-    cfg->initial_max_frame_bytes = env_as_int(VIDEO_MAX_FRAME_BYTES_ENV, 40960);
-    cfg->stats_interval_ms = env_as_int(VIDEO_STATS_INTERVAL_ENV, 100);
-    return 0;
-}
-
-static int open_v4l2_device(const char *device) {
-    int fd = open(device, O_RDWR | O_NONBLOCK);
-    if (fd < 0) {
-        perror("open device");
-    }
-    return fd;
-}
-
-static int init_v4l2_device(int fd, const worker_config_t *cfg) {
-    struct v4l2_format fmt;
-
-    CLEAR(fmt);
-    fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-    fmt.fmt.pix.width = cfg->capture_width;
-    fmt.fmt.pix.height = cfg->capture_height;
-    fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_MJPEG;
-    fmt.fmt.pix.field = V4L2_FIELD_NONE;
-
-    if (ioctl(fd, VIDIOC_S_FMT, &fmt) < 0) {
-        perror("VIDIOC_S_FMT");
-        return -1;
-    }
-    return 0;
-}
-
-static int init_mmap(int fd, Buffer **buffers, int *num_buffers) {
-    struct v4l2_requestbuffers req;
-    int index;
-
-    CLEAR(req);
-    req.count = NUM_BUFFERS;
-    req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-    req.memory = V4L2_MEMORY_MMAP;
-
-    if (ioctl(fd, VIDIOC_REQBUFS, &req) < 0) {
-        perror("VIDIOC_REQBUFS");
-        return -1;
-    }
-
-    *num_buffers = (int) req.count;
-    *buffers = (Buffer *) calloc(req.count, sizeof(Buffer));
-    if (*buffers == NULL) {
-        return -1;
-    }
-
-    for (index = 0; index < (int) req.count; ++index) {
-        struct v4l2_buffer buf;
-        CLEAR(buf);
-        buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-        buf.memory = V4L2_MEMORY_MMAP;
-        buf.index = (unsigned int) index;
-
-        if (ioctl(fd, VIDIOC_QUERYBUF, &buf) < 0) {
-            perror("VIDIOC_QUERYBUF");
-            return -1;
-        }
-
-        (*buffers)[index].length = buf.length;
-        (*buffers)[index].start = mmap(NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, buf.m.offset);
-        if ((*buffers)[index].start == MAP_FAILED) {
-            perror("mmap");
-            return -1;
-        }
-    }
-
-    return 0;
-}
-
-static int queue_all_buffers(int fd, int num_buffers) {
-    int index;
-    for (index = 0; index < num_buffers; ++index) {
-        struct v4l2_buffer buf;
-        CLEAR(buf);
-        buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-        buf.memory = V4L2_MEMORY_MMAP;
-        buf.index = (unsigned int) index;
-        if (ioctl(fd, VIDIOC_QBUF, &buf) < 0) {
-            perror("VIDIOC_QBUF");
-            return -1;
-        }
-    }
-    return 0;
-}
-
-static AVCodecContext *create_mjpeg_decoder(const worker_config_t *cfg) {
-    const AVCodec *decoder = avcodec_find_decoder(AV_CODEC_ID_MJPEG);
-    AVCodecContext *ctx;
-
-    if (decoder == NULL) {
-        fprintf(stderr, "MJPEG decoder not found\n");
-        return NULL;
-    }
-    ctx = avcodec_alloc_context3(decoder);
-    if (ctx == NULL) {
-        return NULL;
-    }
-
-    ctx->width = cfg->capture_width;
-    ctx->height = cfg->capture_height;
-    ctx->pix_fmt = AV_PIX_FMT_YUVJ420P;
-    ctx->color_range = AVCOL_RANGE_JPEG;
-    ctx->thread_count = 1;
-    if (avcodec_open2(ctx, decoder, NULL) < 0) {
-        avcodec_free_context(&ctx);
-        return NULL;
-    }
-    return ctx;
-}
-
-static AVCodecContext *create_mjpeg_encoder(const worker_config_t *cfg) {
-    const AVCodec *encoder = avcodec_find_encoder(AV_CODEC_ID_MJPEG);
-    AVCodecContext *ctx;
-
-    if (encoder == NULL) {
-        fprintf(stderr, "MJPEG encoder not found\n");
-        return NULL;
-    }
-    ctx = avcodec_alloc_context3(encoder);
-    if (ctx == NULL) {
-        return NULL;
-    }
-
-    ctx->width = cfg->output_width;
-    ctx->height = cfg->output_height;
-    ctx->pix_fmt = AV_PIX_FMT_YUVJ420P;
-    ctx->time_base = (AVRational) {1, cfg->initial_fps > 0 ? cfg->initial_fps : 10};
-    ctx->qmin = 1;
-    ctx->qmax = 31;
-    ctx->flags |= AV_CODEC_FLAG_QSCALE;
-    ctx->global_quality = FF_QP2LAMBDA * cfg->initial_qscale;
-    if (avcodec_open2(ctx, encoder, NULL) < 0) {
-        avcodec_free_context(&ctx);
-        return NULL;
-    }
-    return ctx;
-}
-
-static int decode_mjpeg_frame(AVCodecContext *decoder, const uint8_t *data, int size, AVFrame **frame) {
-    AVPacket *pkt;
-    int ret;
-
-    *frame = NULL;
-    pkt = av_packet_alloc();
-    if (pkt == NULL) {
-        return -1;
-    }
-
-    pkt->data = (uint8_t *) data;
-    pkt->size = size;
-    ret = avcodec_send_packet(decoder, pkt);
-    if (ret < 0) {
-        av_packet_free(&pkt);
-        return -1;
-    }
-
-    *frame = av_frame_alloc();
-    if (*frame == NULL) {
-        av_packet_free(&pkt);
-        return -1;
-    }
-    ret = avcodec_receive_frame(decoder, *frame);
-    av_packet_free(&pkt);
-    if (ret < 0) {
-        av_frame_free(frame);
-        return -1;
-    }
-    return 0;
-}
-
-static struct SwsContext *create_scaler(AVFrame *src, const worker_config_t *cfg) {
-    return sws_getContext(
-        src->width,
-        src->height,
-        src->format,
-        cfg->output_width,
-        cfg->output_height,
-        AV_PIX_FMT_YUVJ420P,
-        SWS_BILINEAR,
-        NULL,
-        NULL,
-        NULL);
-}
-
-static int scale_frame(struct SwsContext *sws_ctx, const worker_config_t *cfg, AVFrame *src, AVFrame **dst) {
-    int ret;
-
-    if (sws_ctx == NULL) {
-        return -1;
-    }
-
-    *dst = av_frame_alloc();
-    if (*dst == NULL) {
-        return -1;
-    }
-
-    (*dst)->width = cfg->output_width;
-    (*dst)->height = cfg->output_height;
-    (*dst)->format = AV_PIX_FMT_YUVJ420P;
-    if (av_frame_get_buffer(*dst, 0) < 0) {
-        av_frame_free(dst);
-        return -1;
-    }
-
-    ret = sws_scale(
-        sws_ctx,
-        (const uint8_t *const *) src->data,
-        src->linesize,
-        0,
-        src->height,
-        (*dst)->data,
-        (*dst)->linesize);
-    if (ret < 0) {
-        av_frame_free(dst);
-        return -1;
-    }
-    return 0;
-}
-
-static int encode_frame(AVCodecContext *encoder, AVFrame *frame, int qscale, AVPacket **pkt) {
-    int ret;
-
-    *pkt = av_packet_alloc();
-    if (*pkt == NULL) {
-        return -1;
-    }
-
-    encoder->global_quality = FF_QP2LAMBDA * qscale;
-    frame->quality = encoder->global_quality;
-    ret = avcodec_send_frame(encoder, frame);
-    if (ret < 0) {
-        av_packet_free(pkt);
-        return -1;
-    }
-    ret = avcodec_receive_packet(encoder, *pkt);
-    if (ret < 0) {
-        av_packet_free(pkt);
-        return -1;
-    }
-    return 0;
-}
-
-static int video_sender_init(video_sender_t *sender, const worker_config_t *cfg) {
-    kcp_conn_options_t options;
-
-    if (sender == NULL) {
-        errno = EINVAL;
-        return -1;
-    }
-
-    CLEAR(*sender);
-    snprintf(sender->target_peer, sizeof(sender->target_peer), "%s", cfg->target_peer);
-    kcp_conn_options_set_video_defaults(&options);
-    sender->client = kcp_client_dial_with_options(
-        cfg->server_addr,
-        cfg->relay_addr,
-        cfg->peer_id,
-        cfg->bind_ip,
-        cfg->bind_device,
-        &options,
-        NULL,
-        NULL,
-        NULL,
-        cfg->stats_interval_ms);
-    if (sender->client == NULL) {
-        return -1;
-    }
-
-    fprintf(stderr, "B-side video worker connected as %s -> %s\n", kcp_client_id(sender->client), sender->target_peer);
-    return 0;
-}
-
-static int video_sender_send_packet(video_sender_t *sender, const AVPacket *encoded_pkt) {
-    if (sender == NULL || sender->client == NULL || encoded_pkt == NULL) {
-        errno = EINVAL;
-        return -1;
-    }
-    return kcp_client_send_binary(sender->client, sender->target_peer, encoded_pkt->data, (size_t) encoded_pkt->size);
-}
-
-static void video_sender_close(video_sender_t *sender) {
-    if (sender == NULL || sender->client == NULL) {
-        return;
-    }
-    kcp_client_close(sender->client);
-    kcp_client_free(sender->client);
-    sender->client = NULL;
-}
-
-static void *control_thread_main(void *opaque) {
-    control_thread_args_t *args = (control_thread_args_t *) opaque;
-    char line[512];
-
-    while (fgets(line, sizeof(line), args->control_stream) != NULL) {
-        cJSON *root = cJSON_Parse(line);
-        cJSON *type_item;
-
-        if (root == NULL) {
-            continue;
-        }
-        type_item = cJSON_GetObjectItemCaseSensitive(root, "type");
-        if (!cJSON_IsString(type_item) || type_item->valuestring == NULL) {
-            cJSON_Delete(root);
-            continue;
-        }
-
-        if (strcmp(type_item->valuestring, "shutdown") == 0) {
-            runtime_set_shutdown(args->runtime, true);
-            cJSON_Delete(root);
-            return NULL;
-        }
-        if (strcmp(type_item->valuestring, "set_profile") == 0) {
-            cJSON *fps = cJSON_GetObjectItemCaseSensitive(root, "fps");
-            cJSON *qscale = cJSON_GetObjectItemCaseSensitive(root, "jpeg_quality_qscale");
-            cJSON *max_frame_bytes = cJSON_GetObjectItemCaseSensitive(root, "max_frame_bytes");
-            runtime_set_profile(
-                args->runtime,
-                cJSON_IsNumber(fps) ? fps->valueint : -1,
-                cJSON_IsNumber(qscale) ? qscale->valueint : -1,
-                cJSON_IsNumber(max_frame_bytes) ? max_frame_bytes->valueint : -1);
-        }
-        cJSON_Delete(root);
-    }
-
-    runtime_set_shutdown(args->runtime, true);
-    return NULL;
-}
-
-int main(void) {
-    worker_config_t cfg;
-    runtime_state_t runtime;
-    video_sender_t sender;
-    control_thread_args_t control_args;
-    pthread_t control_thread;
-    FILE *control_stream = NULL;
-    FILE *telemetry_stream = NULL;
-    Buffer *buffers = NULL;
-    int num_buffers = 0;
-    int camera_fd = -1;
-    enum v4l2_buf_type stream_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-    AVCodecContext *decoder = NULL;
-    AVCodecContext *encoder = NULL;
-    struct SwsContext *sws_ctx = NULL;
-    double next_deadline_ms = 0.0;
-    double next_metrics_ms = 0.0;
-    int exit_code = 1;
-    int index;
-    int sws_src_width = 0;
-    int sws_src_height = 0;
-    int sws_src_format = -1;
-    bool control_thread_started = false;
-
-    av_log_set_level(AV_LOG_ERROR);
-    signal(SIGINT, handle_signal);
-    signal(SIGTERM, handle_signal);
-    CLEAR(sender);
-
-    if (load_worker_config(&cfg) != 0) {
-        return 1;
-    }
-
-    CLEAR(runtime);
-    pthread_mutex_init(&runtime.lock, NULL);
-    pthread_mutex_init(&runtime.telemetry_lock, NULL);
-    runtime.target_fps = cfg.initial_fps;
-    runtime.jpeg_quality_qscale = cfg.initial_qscale;
-    runtime.max_frame_bytes = cfg.initial_max_frame_bytes;
-
-    control_stream = fdopen(WORKER_CONTROL_FD, "r");
-    telemetry_stream = fdopen(WORKER_TELEMETRY_FD, "w");
-    if (control_stream == NULL || telemetry_stream == NULL) {
-        perror("fdopen worker control/telemetry");
-        goto cleanup;
-    }
-    setvbuf(telemetry_stream, NULL, _IOLBF, 0);
-    runtime.telemetry_stream = telemetry_stream;
-
-    control_args.control_stream = control_stream;
-    control_args.runtime = &runtime;
-    if (pthread_create(&control_thread, NULL, control_thread_main, &control_args) != 0) {
-        perror("pthread_create");
-        goto cleanup;
-    }
-    control_thread_started = true;
-
-    camera_fd = open_v4l2_device(cfg.video_device);
-    if (camera_fd < 0) {
-        goto cleanup_join_thread;
-    }
-    if (init_v4l2_device(camera_fd, &cfg) != 0) {
-        goto cleanup_join_thread;
-    }
-    if (init_mmap(camera_fd, &buffers, &num_buffers) != 0) {
-        goto cleanup_join_thread;
-    }
-    if (queue_all_buffers(camera_fd, num_buffers) != 0) {
-        goto cleanup_join_thread;
-    }
-    if (ioctl(camera_fd, VIDIOC_STREAMON, &stream_type) < 0) {
-        perror("VIDIOC_STREAMON");
-        goto cleanup_join_thread;
-    }
-
-    decoder = create_mjpeg_decoder(&cfg);
-    encoder = create_mjpeg_encoder(&cfg);
-    if (decoder == NULL || encoder == NULL) {
-        fprintf(stderr, "failed to create codecs\n");
-        goto cleanup_join_thread;
-    }
-    if (video_sender_init(&sender, &cfg) != 0) {
-        perror("video_sender_init");
-        goto cleanup_join_thread;
-    }
-
-    next_deadline_ms = monotonic_ms();
-    next_metrics_ms = next_deadline_ms + 100.0;
-
-    while (!runtime_should_stop(&runtime)) {
-        AVFrame *decoded_frame = NULL;
-        AVFrame *scaled_frame = NULL;
-        AVPacket *encoded_pkt = NULL;
-        struct v4l2_buffer buf;
-        fd_set fds;
-        struct timeval tv;
-        int select_result;
-        int fps;
-        int qscale;
-        int max_frame_bytes;
-        int encode_us = 0;
-        bool sent = false;
-        const char *drop_reason = "";
-        double now_ms = monotonic_ms();
-        double encode_start_ms;
-        double encode_end_ms;
-
-        runtime_get_profile(&runtime, &fps, &qscale, &max_frame_bytes);
-        if (fps < 1) {
-            fps = 1;
-        }
-        if (next_deadline_ms > now_ms) {
-            usleep((useconds_t) ((next_deadline_ms - now_ms) * 1000.0));
-        }
-        next_deadline_ms = monotonic_ms() + (1000.0 / (double) fps);
-
-        FD_ZERO(&fds);
-        FD_SET(camera_fd, &fds);
-        tv.tv_sec = 2;
-        tv.tv_usec = 0;
-        select_result = select(camera_fd + 1, &fds, NULL, NULL, &tv);
-        if (select_result <= 0) {
-            if (select_result < 0 && errno == EINTR) {
-                continue;
-            }
-            fprintf(stderr, "select timeout/error on camera\n");
-            continue;
-        }
-
-        CLEAR(buf);
-        buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-        buf.memory = V4L2_MEMORY_MMAP;
-        if (ioctl(camera_fd, VIDIOC_DQBUF, &buf) < 0) {
-            if (errno == EAGAIN) {
-                continue;
-            }
-            perror("VIDIOC_DQBUF");
-            break;
-        }
-
-        if (decode_mjpeg_frame(decoder, (uint8_t *) buffers[buf.index].start, (int) buf.bytesused, &decoded_frame) != 0) {
-            drop_reason = "decode_failed";
-            goto requeue_and_report;
-        }
-
-        if (
-            sws_ctx == NULL
-            || sws_src_width != decoded_frame->width
-            || sws_src_height != decoded_frame->height
-            || sws_src_format != decoded_frame->format
-        ) {
-            sws_freeContext(sws_ctx);
-            sws_ctx = create_scaler(decoded_frame, &cfg);
-            sws_src_width = decoded_frame->width;
-            sws_src_height = decoded_frame->height;
-            sws_src_format = decoded_frame->format;
-        }
-        if (scale_frame(sws_ctx, &cfg, decoded_frame, &scaled_frame) != 0) {
-            drop_reason = "scale_failed";
-            goto requeue_and_report;
-        }
-
-        encode_start_ms = monotonic_ms();
-        if (encode_frame(encoder, scaled_frame, qscale, &encoded_pkt) != 0) {
-            drop_reason = "encode_failed";
-            goto requeue_and_report;
-        }
-        encode_end_ms = monotonic_ms();
-        encode_us = (int) ((encode_end_ms - encode_start_ms) * 1000.0);
-
-        if (encoded_pkt->size > max_frame_bytes) {
-            drop_reason = "frame_too_large";
-            goto requeue_and_report;
-        }
-        if (video_sender_send_packet(&sender, encoded_pkt) != 0) {
-            perror("video_sender_send_packet");
-            drop_reason = "send_failed";
-            goto requeue_and_report;
-        }
-        sent = true;
-
-requeue_and_report:
-        telemetry_write_frame_stat(
-            &runtime,
-            encoded_pkt != NULL ? encoded_pkt->size : 0,
-            encode_us,
-            sent,
-            drop_reason);
-
-        if (ioctl(camera_fd, VIDIOC_QBUF, &buf) < 0) {
-            perror("VIDIOC_QBUF");
-            av_frame_free(&decoded_frame);
-            av_frame_free(&scaled_frame);
-            if (encoded_pkt != NULL) {
-                av_packet_free(&encoded_pkt);
-            }
-            break;
-        }
-
-        av_frame_free(&decoded_frame);
-        av_frame_free(&scaled_frame);
-        if (encoded_pkt != NULL) {
-            av_packet_free(&encoded_pkt);
-        }
-
-        now_ms = monotonic_ms();
-        if (sender.client != NULL && now_ms >= next_metrics_ms) {
-            kcp_conn_metrics_t metrics;
-            if (kcp_client_metrics_snapshot(sender.client, &metrics) == 0) {
-                telemetry_write_kcp_metrics(&runtime, &metrics);
-            }
-            next_metrics_ms = now_ms + 100.0;
-        }
-    }
-
-    exit_code = 0;
-
-cleanup_join_thread:
-    runtime_set_shutdown(&runtime, true);
-    if (control_stream != NULL) {
-        fclose(control_stream);
-        control_stream = NULL;
-    }
-    if (control_thread_started) {
-        pthread_join(control_thread, NULL);
-    }
-
-cleanup:
-    if (control_stream != NULL) {
-        fclose(control_stream);
-        control_stream = NULL;
-    }
-    if (camera_fd >= 0) {
-        ioctl(camera_fd, VIDIOC_STREAMOFF, &stream_type);
-    }
-    if (buffers != NULL) {
-        for (index = 0; index < num_buffers; ++index) {
-            if (buffers[index].start != NULL && buffers[index].start != MAP_FAILED) {
-                munmap(buffers[index].start, buffers[index].length);
-            }
-        }
-        free(buffers);
-    }
-    video_sender_close(&sender);
-    if (encoder != NULL) {
-        avcodec_free_context(&encoder);
-    }
-    if (decoder != NULL) {
-        avcodec_free_context(&decoder);
-    }
-    sws_freeContext(sws_ctx);
-    if (camera_fd >= 0) {
-        close(camera_fd);
-    }
-    if (telemetry_stream != NULL) {
-        fclose(telemetry_stream);
-        telemetry_stream = NULL;
-    }
-    pthread_mutex_destroy(&runtime.lock);
-    pthread_mutex_destroy(&runtime.telemetry_lock);
-    return exit_code;
-}

cmd/kcppeer.c

@@ -262,9 +262,9 @@ int main(int argc, char **argv) {
         goto cleanup;
     }
     if (relay_via[0] != '\0') {
-        fprintf(stderr, "opened KCP session as %s; logical server=%s, actual dial target=%s via relay; register not yet confirmed\n", kcp_client_id(client), server_addr, actual_dial_target);
+        fprintf(stderr, "opened KCP session as %s; logical server=%s, actual dial target=%s via relay; registration confirmed\n", kcp_client_id(client), server_addr, actual_dial_target);
     } else {
-        fprintf(stderr, "opened KCP session as %s; logical server=%s, actual dial target=%s; register not yet confirmed\n", kcp_client_id(client), server_addr, actual_dial_target);
+        fprintf(stderr, "opened KCP session as %s; logical server=%s, actual dial target=%s; registration confirmed\n", kcp_client_id(client), server_addr, actual_dial_target);
     }
 
     receive_ctx.client = client;

cmd/kcpserver.c

@@ -6,6 +6,7 @@ static void kcpserver_usage(FILE *out) {
     fprintf(out, "usage: kcpserver [-mode hub|relay] [-listen addr] [-bind-device dev]\n");
     fprintf(out, "                 [-latency-log path] [-kcp-ts-debug-log path]\n");
     fprintf(out, "                 [-kcp-session-stats-log path] [-kcp-session-stats-interval 100ms]\n");
+    fprintf(out, "                 [-telemetry-peer peer-id] [-telemetry-interval 500ms]\n");
     fprintf(out, "                 [-relay-remote addr] [-relay-listen addr] [-relay-peer addr]\n");
 }
 
@@ -17,10 +18,13 @@ int main(int argc, char **argv) {
     const char *packet_log_path = "";
     const char *stats_log_path = "";
     const char *stats_interval_raw = "";
+    const char *telemetry_peer_id = "";
+    const char *telemetry_interval_raw = "";
     const char *relay_listen_alias = "";
     const char *relay_remote_addr = "";
     const char *relay_peer_alias = "";
     int stats_interval_ms = KCP_DEFAULT_STATS_INTERVAL_MS;
+    int telemetry_interval_ms = 500;
     int i;
     int rc = 1;
 
@@ -84,6 +88,20 @@ int main(int argc, char **argv) {
             stats_interval_raw = value;
             continue;
         }
+        if ((handled = cli_parse_value_flag(argc, argv, &i, argv[i], "-telemetry-peer", &value)) < 0) {
+            fprintf(stderr, "kcpserver: flag -telemetry-peer requires a value\n");
+            return 1;
+        } else if (handled) {
+            telemetry_peer_id = value;
+            continue;
+        }
+        if ((handled = cli_parse_value_flag(argc, argv, &i, argv[i], "-telemetry-interval", &value)) < 0) {
+            fprintf(stderr, "kcpserver: flag -telemetry-interval requires a value\n");
+            return 1;
+        } else if (handled) {
+            telemetry_interval_raw = value;
+            continue;
+        }
         if ((handled = cli_parse_value_flag(argc, argv, &i, argv[i], "-relay-listen", &value)) < 0) {
             fprintf(stderr, "kcpserver: flag -relay-listen requires a value\n");
             return 1;
@@ -118,6 +136,10 @@ int main(int argc, char **argv) {
         fprintf(stderr, "kcpserver: invalid -kcp-session-stats-interval value %s\n", stats_interval_raw);
         return 1;
     }
+    if (omni_parse_duration_ms(telemetry_interval_raw, 500, &telemetry_interval_ms) != 0) {
+        fprintf(stderr, "kcpserver: invalid -telemetry-interval value %s\n", telemetry_interval_raw);
+        return 1;
+    }
 
     if (relay_peer_alias[0] != '\0' && relay_remote_addr[0] != '\0' && strcmp(relay_peer_alias, relay_remote_addr) != 0) {
         fprintf(stderr, "kcpserver: flags -relay-remote and -relay-peer must match when both are set\n");
@@ -178,6 +200,10 @@ int main(int argc, char **argv) {
             fprintf(stderr, "kcpserver: create hub failed\n");
             goto cleanup;
         }
+        if (telemetry_peer_id[0] != '\0' && kcp_hub_set_telemetry(hub, telemetry_peer_id, telemetry_interval_ms) != 0) {
+            fprintf(stderr, "kcpserver: configure telemetry peer %s failed\n", telemetry_peer_id);
+            goto cleanup;
+        }
         fprintf(stderr, "kcp hub listening on %s\n", listen_addr);
         if (kcp_hub_serve_listener(hub, listener) != 0) {
             fprintf(stderr, "kcpserver: serve listener failed\n");
@@ -188,6 +214,10 @@ int main(int argc, char **argv) {
     }
 
     if (strcmp(mode, "relay") == 0) {
+        if (telemetry_peer_id[0] != '\0') {
+            fprintf(stderr, "kcpserver: flag -telemetry-peer may only be used in hub mode\n");
+            return 1;
+        }
         if (bind_device[0] != '\0') {
             fprintf(stderr, "kcpserver: flag -bind-device is not supported in relay mode\n");
             return 1;

cmd/v1_camera_pipeline_ifdef.c

@@ -1,652 +1,35 @@
-// camera_pipeline_ifdef_fixed.c
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/time.h>
-#include <linux/videodev2.h>
-#include <time.h>
 
-// FFmpeg头文件 - 使用纯C包含
-#include <libavcodec/avcodec.h>
-#include <libavformat/avformat.h>
-#include <libavutil/avutil.h>
-#include <libavutil/imgutils.h>
-#include <libavutil/opt.h>
-#include <libswscale/swscale.h>
+#include "video_pipeline.h"
 
-#include "peer_kcp_client.h"
+int main(void) {
+    video_pipeline_config_t config;
+    video_pipeline_stats_t stats;
 
-// ==========================================
-// 1. 配置区域：在这里开启或关闭时间打印
-// ==========================================
-#define DEBUG_TIMING // 注释掉这一行，所有时间打印和计算都会消失
-
-// 定义打印宏
-#ifdef DEBUG_TIMING
-#define PRINT_TIME(fmt, ...) printf(fmt, ##__VA_ARGS__)
-#else
-#define PRINT_TIME(fmt, ...) // 什么都不做，编译器会优化掉
-#endif
-
-#define WIDTH 1280
-#define HEIGHT 720
-#define OUTPUT_WIDTH 640
-#define OUTPUT_HEIGHT 360
-#define NUM_BUFFERS 4
-#define CLEAR(x) memset(&(x), 0, sizeof(x))
-
-#define VIDEO_SERVER_ADDR_ENV "OMNI_VIDEO_SERVER_ADDR"
-#define VIDEO_RELAY_ADDR_ENV "OMNI_VIDEO_RELAY_VIA"
-#define VIDEO_BIND_IP_ENV "OMNI_VIDEO_BIND_IP"
-#define VIDEO_BIND_DEVICE_ENV "OMNI_VIDEO_BIND_DEVICE"
-#define VIDEO_PEER_ID_ENV "OMNI_VIDEO_PEER_ID"
-#define VIDEO_TARGET_PEER_ENV "OMNI_VIDEO_TARGET_PEER"
-#define VIDEO_DEFAULT_PEER_ID "peer-b-video"
-#define VIDEO_DEFAULT_TARGET_PEER "peer-a-video"
-
-typedef struct
-{
-    kcp_client_t *client;
-    char target_peer[OMNI_MAX_PEER_ID];
-} VideoSender;
-
-static int video_sender_init(VideoSender *sender);
-static int video_sender_send_packet(VideoSender *sender, const AVPacket *encoded_pkt);
-static void video_sender_close(VideoSender *sender);
-
-typedef struct
-{
-    void *start;
-    size_t length;
-} Buffer;
-
-double get_time_ms()
-{
-    struct timespec ts;
-    clock_gettime(CLOCK_MONOTONIC, &ts);
-    return ts.tv_sec * 1000.0 + ts.tv_nsec / 1000000.0;
-}
-
-static const char *env_or_default(const char *name, const char *fallback)
-{
-    const char *value = getenv(name);
-
-    if (value != NULL && value[0] != '\0')
-        return value;
-    return fallback;
-}
-
-static int video_sender_init(VideoSender *sender)
-{
-    const char *server_addr = getenv(VIDEO_SERVER_ADDR_ENV);
-    const char *relay_addr = env_or_default(VIDEO_RELAY_ADDR_ENV, "");
-    const char *bind_ip = env_or_default(VIDEO_BIND_IP_ENV, "");
-    const char *bind_device = env_or_default(VIDEO_BIND_DEVICE_ENV, "");
-    const char *peer_id = env_or_default(VIDEO_PEER_ID_ENV, VIDEO_DEFAULT_PEER_ID);
-    const char *target_peer = env_or_default(VIDEO_TARGET_PEER_ENV, VIDEO_DEFAULT_TARGET_PEER);
-    kcp_conn_options_t options;
-
-    if (sender == NULL)
-    {
-        errno = EINVAL;
-        return -1;
+    video_pipeline_config_init(&config);
+    video_pipeline_config_load_env(&config);
+    if (getenv("OMNI_VIDEO_DEBUG_TIMING") == NULL) {
+        config.enable_timing_logs = 1;
     }
-    if (server_addr == NULL || server_addr[0] == '\0')
-    {
-        errno = EINVAL;
-        fprintf(stderr, "%s is required\n", VIDEO_SERVER_ADDR_ENV);
-        return -1;
+    if (video_pipeline_stats_init(&stats) != 0) {
+        perror("video_pipeline_stats_init");
+        return 1;
     }
 
-    memset(sender, 0, sizeof(*sender));
-    snprintf(sender->target_peer, sizeof(sender->target_peer), "%s", target_peer);
+    for (;;) {
+        int rc = video_pipeline_run(&config, &stats, NULL);
 
-    kcp_conn_options_set_video_defaults(&options);
-    sender->client = kcp_client_dial_with_options(
-        server_addr,
-        relay_addr,
-        peer_id,
-        bind_ip,
-        bind_device,
-        &options,
-        NULL,
-        NULL,
-        NULL,
-        KCP_DEFAULT_STATS_INTERVAL_MS);
-    if (sender->client == NULL)
-        return -1;
-
-    fprintf(stderr, "Video sender connected as %s -> %s\n",
-            kcp_client_id(sender->client), sender->target_peer);
-
-    return 0;
-}
-
-static int video_sender_send_packet(VideoSender *sender, const AVPacket *encoded_pkt)
-{
-    if (sender == NULL || sender->client == NULL || encoded_pkt == NULL)
-    {
-        errno = EINVAL;
-        return -1;
-    }
-    return kcp_client_send_binary(
-        sender->client,
-        sender->target_peer,
-        encoded_pkt->data,
-        (size_t)encoded_pkt->size);
-}
-
-static void video_sender_close(VideoSender *sender)
-{
-    if (sender == NULL || sender->client == NULL)
-        return;
-
-    kcp_client_close(sender->client);
-    kcp_client_free(sender->client);
-    sender->client = NULL;
-}
-
-int open_v4l2_device(const char *device)
-{
-    int fd = open(device, O_RDWR | O_NONBLOCK);
-    if (fd < 0)
-    {
-        perror("open device");
-        return -1;
-    }
-    return fd;
-}
-
-int init_v4l2_device(int fd)
-{
-    struct v4l2_format fmt = {0};
-    fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-    fmt.fmt.pix.width = WIDTH;
-    fmt.fmt.pix.height = HEIGHT;
-    fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_MJPEG;
-    fmt.fmt.pix.field = V4L2_FIELD_NONE;
-
-    if (ioctl(fd, VIDIOC_S_FMT, &fmt) < 0)
-    {
-        perror("VIDIOC_S_FMT");
-        return -1;
-    }
-
-    PRINT_TIME("Set format: %dx%d MJPEG\n", WIDTH, HEIGHT);
-    return 0;
-}
-
-int init_mmap(int fd, Buffer **buffers, int *num_buffers)
-{
-    struct v4l2_requestbuffers req = {0};
-    req.count = NUM_BUFFERS;
-    req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-    req.memory = V4L2_MEMORY_MMAP;
-
-    if (ioctl(fd, VIDIOC_REQBUFS, &req) < 0)
-    {
-        perror("VIDIOC_REQBUFS");
-        return -1;
-    }
-
-    *num_buffers = req.count;
-    *buffers = (Buffer *)calloc(req.count, sizeof(Buffer));
-
-    for (int i = 0; i < req.count; i++)
-    {
-        struct v4l2_buffer buf = {0};
-        buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-        buf.memory = V4L2_MEMORY_MMAP;
-        buf.index = i;
-
-        if (ioctl(fd, VIDIOC_QUERYBUF, &buf) < 0)
-        {
-            perror("VIDIOC_QUERYBUF");
-            return -1;
+        if (rc == 0) {
+            break;
         }
-
-        (*buffers)[i].length = buf.length;
-        (*buffers)[i].start = mmap(NULL, buf.length,
-                                   PROT_READ | PROT_WRITE,
-                                   MAP_SHARED, fd, buf.m.offset);
-
-        if ((*buffers)[i].start == MAP_FAILED)
-        {
-            perror("mmap");
-            return -1;
-        }
-    }
-
-    return 0;
-}
-
-AVCodecContext *create_mjpeg_decoder()
-{
-    const AVCodec *decoder = avcodec_find_decoder(AV_CODEC_ID_MJPEG);
-    if (!decoder)
-    {
-        fprintf(stderr, "MJPEG decoder not found\n");
-        return NULL;
-    }
-
-    AVCodecContext *ctx = avcodec_alloc_context3(decoder);
-    ctx->width = WIDTH;
-    ctx->height = HEIGHT;
-    ctx->pix_fmt = AV_PIX_FMT_YUVJ420P;  // 使用YUVJ420P
-    ctx->color_range = AVCOL_RANGE_JPEG; // JPEG范围
-    ctx->thread_count = 1;
-
-    AVDictionary *opts = NULL;
-    av_dict_set(&opts, "flags2", "+fast", 0);
-
-    if (avcodec_open2(ctx, decoder, &opts) < 0)
-    {
-        avcodec_free_context(&ctx);
-        av_dict_free(&opts);
-        return NULL;
-    }
-
-    av_dict_free(&opts);
-    printf("Decoder created with format: YUVJ420P\n");
-    return ctx;
-}
-
-AVCodecContext *create_mjpeg_encoder()
-{
-    const AVCodec *encoder = avcodec_find_encoder(AV_CODEC_ID_MJPEG);
-    if (!encoder)
-    {
-        fprintf(stderr, "MJPEG encoder not found\n");
-        return NULL;
-    }
-
-    AVCodecContext *ctx = avcodec_alloc_context3(encoder);
-    ctx->width = OUTPUT_WIDTH;
-    ctx->height = OUTPUT_HEIGHT;
-    ctx->pix_fmt = AV_PIX_FMT_YUVJ420P; // 使用YUVJ420P
-    ctx->time_base = (AVRational){1, 30};
-    ctx->qmin = 8;
-    ctx->qmax = 31;
-    ctx->flags |= AV_CODEC_FLAG_QSCALE;
-    ctx->global_quality = FF_QP2LAMBDA * 5;
-
-    AVDictionary *opts = NULL;
-    av_dict_set(&opts, "huffman", "default", 0);
-
-    if (avcodec_open2(ctx, encoder, &opts) < 0)
-    {
-        avcodec_free_context(&ctx);
-        av_dict_free(&opts);
-        return NULL;
-    }
-
-    av_dict_free(&opts);
-    printf("Encoder created with format: YUVJ420P\n");
-    return ctx;
-}
-
-int decode_mjpeg_frame(AVCodecContext *decoder, const uint8_t *data, int size, AVFrame **frame)
-{
-    if (frame == NULL)
-        return -1;
-
-    *frame = NULL;
-    AVPacket *pkt = av_packet_alloc();
-    if (!pkt)
-        return -1;
-
-    pkt->data = (uint8_t *)data;
-    pkt->size = size;
-
-    int ret = avcodec_send_packet(decoder, pkt);
-    if (ret < 0)
-    {
-        av_packet_free(&pkt);
-        return -1;
-    }
-
-    *frame = av_frame_alloc();
-    if (!*frame)
-    {
-        av_packet_free(&pkt);
-        return -1;
-    }
-    ret = avcodec_receive_frame(decoder, *frame);
-
-    av_packet_free(&pkt);
-    if (ret < 0)
-        av_frame_free(frame);
-    return ret;
-}
-
-int scale_frame(AVFrame *src, AVFrame **dst)
-{
-    // 简单缩放，不设置复杂的色彩空间参数
-    struct SwsContext *sws_ctx = sws_getContext(
-        src->width, src->height, src->format,
-        OUTPUT_WIDTH, OUTPUT_HEIGHT, AV_PIX_FMT_YUVJ420P,
-        SWS_BILINEAR, NULL, NULL, NULL);
-
-    if (!sws_ctx)
-    {
-        fprintf(stderr, "Failed to create sws context\n");
-        return -1;
-    }
-
-    *dst = av_frame_alloc();
-    if (!*dst)
-    {
-        sws_freeContext(sws_ctx);
-        return -1;
-    }
-
-    (*dst)->width = OUTPUT_WIDTH;
-    (*dst)->height = OUTPUT_HEIGHT;
-    (*dst)->format = AV_PIX_FMT_YUVJ420P;
-
-    if (av_frame_get_buffer(*dst, 0) < 0)
-    {
-        fprintf(stderr, "Failed to allocate frame buffer\n");
-        av_frame_free(dst);
-        sws_freeContext(sws_ctx);
-        return -1;
-    }
-
-    int ret = sws_scale(sws_ctx, (const uint8_t *const *)src->data, src->linesize,
-                        0, src->height, (*dst)->data, (*dst)->linesize);
-
-    sws_freeContext(sws_ctx);
-
-    if (ret < 0)
-    {
-        fprintf(stderr, "sws_scale failed\n");
-        av_frame_free(dst);
-        return -1;
-    }
-
-    return 0;
-}
-
-int encode_frame(AVCodecContext *encoder, AVFrame *frame, AVPacket **pkt)
-{
-    if (pkt == NULL)
-        return -1;
-
-    *pkt = NULL;
-    *pkt = av_packet_alloc();
-    if (!*pkt)
-        return -1;
-
-    int ret = avcodec_send_frame(encoder, frame);
-    if (ret < 0)
-    {
-        av_packet_free(pkt);
-        return -1;
-    }
-
-    ret = avcodec_receive_packet(encoder, *pkt);
-    if (ret < 0)
-        av_packet_free(pkt);
-    return ret;
-}
-
-int main()
-{
-    VideoSender sender;
-
-    memset(&sender, 0, sizeof(sender));
-
-    PRINT_TIME("=== V4L2 Direct Capture + FFmpeg Processing ===\n");
-
-    // 1. Open V4L2 device
-    int fd = open_v4l2_device("/dev/video0");
-    if (fd < 0)
-    {
-        fprintf(stderr, "Failed to open camera device\n");
-        return 1;
-    }
-
-    // 2. Initialize V4L2
-    if (init_v4l2_device(fd) < 0)
-    {
-        close(fd);
-        return 1;
-    }
-
-    // 3. Setup MMAP buffers
-    Buffer *buffers = NULL;
-    int num_buffers = 0;
-    if (init_mmap(fd, &buffers, &num_buffers) < 0)
-    {
-        close(fd);
-        return 1;
-    }
-
-    // 4. Create FFmpeg codecs
-    AVCodecContext *decoder = create_mjpeg_decoder();
-    AVCodecContext *encoder = create_mjpeg_encoder();
-    if (!decoder || !encoder)
-    {
-        fprintf(stderr, "Failed to create codecs\n");
-        close(fd);
-        return 1;
-    }
-
-    if (video_sender_init(&sender) < 0)
-    {
-        perror("video_sender_init");
-        video_sender_close(&sender);
-        avcodec_free_context(&encoder);
-        avcodec_free_context(&decoder);
-        close(fd);
-        return 1;
-    }
-
-    // 5. Queue buffers
-    for (int i = 0; i < num_buffers; i++)
-    {
-        struct v4l2_buffer buf = {0};
-        buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-        buf.memory = V4L2_MEMORY_MMAP;
-        buf.index = i;
-
-        if (ioctl(fd, VIDIOC_QBUF, &buf) < 0)
-        {
-            perror("VIDIOC_QBUF");
-            close(fd);
+        if (rc != VIDEO_PIPELINE_RUN_RETRY_IMMEDIATE) {
+            perror("video_pipeline_run");
+            video_pipeline_stats_destroy(&stats);
             return 1;
         }
     }
 
-    // 6. Start streaming
-    enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-    if (ioctl(fd, VIDIOC_STREAMON, &type) < 0)
-    {
-        perror("VIDIOC_STREAMON");
-        close(fd);
-        return 1;
-    }
-
-    // 7. Benchmark
-    // 使用宏控制打印表头
-    PRINT_TIME("\nRunning benchmark (100 frames)...\n");
-    PRINT_TIME("Frame | Capture | Decode | Scale | Encode | Total | Size | Marker\n");
-    PRINT_TIME("------|---------|--------|-------|--------|-------|------|--------\n");
-
-    for (int i = 0; i < 100; i++)
-    {
-// 只有在开启 DEBUG_TIMING 时才声明这些时间变量
-#ifdef DEBUG_TIMING
-        double total_start = get_time_ms();
-        double capture_start, capture_end;
-        double decode_start, decode_end;
-        double scale_start, scale_end;
-        double encode_start, encode_end;
-#endif
-
-        // Wait for frame
-        fd_set fds;
-        FD_ZERO(&fds);
-        FD_SET(fd, &fds);
-
-        struct timeval tv = {2, 0};
-        int r = select(fd + 1, &fds, NULL, NULL, &tv);
-        if (r <= 0)
-        {
-            PRINT_TIME("Timeout waiting for frame\n");
-            break;
-        }
-
-#ifdef DEBUG_TIMING
-        capture_start = get_time_ms();
-#endif
-
-        // Dequeue buffer
-        struct v4l2_buffer buf = {0};
-        buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-        buf.memory = V4L2_MEMORY_MMAP;
-
-        if (ioctl(fd, VIDIOC_DQBUF, &buf) < 0)
-        {
-            perror("VIDIOC_DQBUF");
-            break;
-        }
-
-#ifdef DEBUG_TIMING
-        capture_end = get_time_ms();
-#endif
-
-// Decode
-#ifdef DEBUG_TIMING
-        decode_start = get_time_ms();
-#endif
-
-        AVFrame *decoded_frame = NULL;
-        int ret = decode_mjpeg_frame(decoder,
-                                     (uint8_t *)buffers[buf.index].start, buf.bytesused, &decoded_frame);
-
-#ifdef DEBUG_TIMING
-        decode_end = get_time_ms();
-#endif
-
-        if (ret < 0 || !decoded_frame)
-        {
-            PRINT_TIME("Frame %d: Decode failed\n", i + 1);
-            ioctl(fd, VIDIOC_QBUF, &buf);
-            continue;
-        }
-
-// Scale
-#ifdef DEBUG_TIMING
-        scale_start = get_time_ms();
-#endif
-
-        AVFrame *scaled_frame = NULL;
-        if (scale_frame(decoded_frame, &scaled_frame) < 0)
-        {
-            PRINT_TIME("Frame %d: Scale failed\n", i + 1);
-            av_frame_free(&decoded_frame);
-            ioctl(fd, VIDIOC_QBUF, &buf);
-            continue;
-        }
-
-#ifdef DEBUG_TIMING
-        scale_end = get_time_ms();
-#endif
-
-// Encode
-#ifdef DEBUG_TIMING
-        encode_start = get_time_ms();
-#endif
-
-        AVPacket *encoded_pkt = NULL;
-        if (encode_frame(encoder, scaled_frame, &encoded_pkt) < 0)
-        {
-            PRINT_TIME("Frame %d: Encode failed\n", i + 1);
-        }
-#ifdef DEBUG_TIMING
-        if (encoded_pkt && i % 50 == 0)
-        {
-            char filename[100];
-            sprintf(filename, "frame_%04d.jpg", i + 1);
-
-            FILE *f = fopen(filename, "wb");
-            if (f)
-            {
-                fwrite(encoded_pkt->data, 1, encoded_pkt->size, f);
-                fclose(f);
-                PRINT_TIME("Saved as %s\n", filename);
-            }
-        }
-#endif
-
-#ifdef DEBUG_TIMING
-        encode_end = get_time_ms();
-        double total_end = get_time_ms();
-#endif
-
-// 打印结果
-#ifdef DEBUG_TIMING
-        PRINT_TIME("%5d | %7.1f | %6.1f | %5.1f | %6.1f | %5.1f | %4d KB  | 0x%02x\n",
-                   i + 1,
-                   capture_end - capture_start,
-                   decode_end - decode_start,
-                   scale_end - scale_start,
-                   encode_end - encode_start,
-                   total_end - total_start,
-                   encoded_pkt ? encoded_pkt->size / 1024 : 0,
-                   encoded_pkt && encoded_pkt->size > 1 ? encoded_pkt->data[1] : 0);
-#else
-        // 如果不开启宏，也打印一些基本信息
-        printf("Frame %d processed\n", i + 1);
-#endif
-
-        if (encoded_pkt && video_sender_send_packet(&sender, encoded_pkt) != 0)
-        {
-            perror("video_sender_send_packet");
-            av_frame_free(&decoded_frame);
-            av_frame_free(&scaled_frame);
-            av_packet_free(&encoded_pkt);
-            ioctl(fd, VIDIOC_QBUF, &buf);
-            break;
-        }
-
-        // Cleanup
-        av_frame_free(&decoded_frame);
-        av_frame_free(&scaled_frame);
-        if (encoded_pkt)
-            av_packet_free(&encoded_pkt);
-
-        // Requeue buffer
-        if (ioctl(fd, VIDIOC_QBUF, &buf) < 0)
-        {
-            perror("VIDIOC_QBUF");
-            break;
-        }
-    }
-
-    // 8. Stop streaming
-    ioctl(fd, VIDIOC_STREAMOFF, &type);
-
-    // 9. Cleanup
-    for (int i = 0; i < num_buffers; i++)
-    {
-        if (buffers[i].start != MAP_FAILED)
-        {
-            munmap(buffers[i].start, buffers[i].length);
-        }
-    }
-    free(buffers);
-    video_sender_close(&sender);
-    avcodec_free_context(&encoder);
-    avcodec_free_context(&decoder);
-    close(fd);
-
+    video_pipeline_stats_destroy(&stats);
     return 0;
 }
-// gcc -o v1_camera_pipeline_ifdef v1_camera_pipeline_ifdef.c $(pkg-config --cflags --libs libavformat libavcodec libavutil libswscale)

config/a_side_omnidaemon.yaml

@@ -1,51 +0,0 @@
-transport:
-  server_addr: "81.70.156.140:10909"
-  relay_via: "106.55.173.235:10909"
-  bind_ip: ""
-  bind_device: ""
-
-control_sender:
-  peer_id: "peer-a-ctrl"
-  target_peer: "peer-b-ctrl"
-  nodelay: 1
-  interval_ms: 5
-  resend: 2
-  nc: 1
-  sndwnd: 32
-  rcvwnd: 32
-  mtu: 1400
-  stats_interval_ms: 100
-
-video_receiver:
-  peer_id: "peer-a-video"
-  buffer_bytes: 1048576
-  nodelay: 1
-  interval_ms: 10
-  resend: 2
-  nc: 1
-  sndwnd: 256
-  rcvwnd: 256
-  mtu: 1400
-  stats_interval_ms: 100
-
-daemon:
-  socket_path: "/tmp/omnisocket-a-side.sock"
-  reconnect_delay_ms: 2000
-  telemetry_interval_ms: 100
-  analog_send_hz: 100
-  frame_stale_ms: 500
-
-policy:
-  health_window_ms: 2000
-  green_srtt_ms: 35
-  yellow_srtt_ms: 60
-  retrans_red_threshold: 10
-  profile_green:
-    fps: 15
-    max_frame_kb: 60
-  profile_yellow:
-    fps: 10
-    max_frame_kb: 40
-  profile_red:
-    fps: 5
-    max_frame_kb: 20

config/b_side_omnidaemon.yaml

@@ -1,58 +0,0 @@
-transport:
-  server_addr: "81.70.156.140:10909"
-  relay_via: "106.55.173.235:10909"
-  bind_ip: ""
-  bind_device: ""
-
-control_receiver:
-  peer_id: "peer-b-ctrl"
-  nodelay: 1
-  interval_ms: 5
-  resend: 2
-  nc: 1
-  sndwnd: 32
-  rcvwnd: 32
-  mtu: 1400
-  stats_interval_ms: 100
-  queue_capacity: 256
-
-video_sender:
-  enabled: false
-  peer_id: "peer-b-video"
-  target_peer: "peer-a-video"
-  binary_path: "bin/b_side_video_sender"
-  device: "/dev/video0"
-  capture_width: 1280
-  capture_height: 720
-  output_width: 640
-  output_height: 360
-  fps: 10
-  jpeg_quality_qscale: 8
-  max_frame_bytes: 40960
-  stats_interval_ms: 100
-
-daemon:
-  socket_path: "/tmp/omnisocket-b-side.sock"
-  ctrl_socket_path: "/tmp/omnisocket-b-ctrl.sock"
-  reconnect_delay_ms: 2000
-  telemetry_interval_ms: 100
-  worker_restart_delay_ms: 2000
-
-policy:
-  mode: "auto"
-  health_window_ms: 2000
-  green_srtt_ms: 30
-  yellow_srtt_ms: 55
-  retrans_red_threshold: 8
-  profile_green:
-    fps: 10
-    jpeg_quality_qscale: 8
-    max_frame_bytes: 40960
-  profile_yellow:
-    fps: 7
-    jpeg_quality_qscale: 12
-    max_frame_bytes: 28672
-  profile_red:
-    fps: 5
-    jpeg_quality_qscale: 16
-    max_frame_bytes: 20480

include/control_protocol.h

@@ -0,0 +1,7 @@
+#ifndef OMNI_CONTROL_PROTOCOL_H
+#define OMNI_CONTROL_PROTOCOL_H
+
+#define OMNI_CONTROL_PACKET_FLOATS 6
+#define OMNI_CONTROL_PACKET_SIZE (OMNI_CONTROL_PACKET_FLOATS * sizeof(float))
+
+#endif

include/gps_buffer.h

@@ -0,0 +1,16 @@
+#ifndef GPS_BUFFER_H
+#define GPS_BUFFER_H
+
+#include <stdint.h>
+
+typedef struct gps_video_sample {
+    double latitude;
+    double longitude;
+} gps_video_sample_t;
+
+gps_video_sample_t get_latest_gps_for_video(void);
+
+
+int gps_buffer_init(const char* host);
+void gps_buffer_cleanup(void);
+#endif

include/kcp_session_stats.h

@@ -26,6 +26,16 @@ typedef struct kcp_session_stats_record {
     int32_t srtt_ms;
     int has_srttvar_ms;
     int32_t srttvar_ms;
+    int has_snd_wnd;
+    uint32_t snd_wnd;
+    int has_rmt_wnd;
+    uint32_t rmt_wnd;
+    int has_inflight;
+    uint32_t inflight;
+    int has_window_limit;
+    uint32_t window_limit;
+    int has_window_pressure_pct;
+    double window_pressure_pct;
     int has_bytes_sent;
     uint64_t bytes_sent;
     int has_bytes_received;

include/peer_kcp_client.h

@@ -16,6 +16,12 @@ typedef struct kcp_client_recv_meta {
     char file_name[OMNI_MAX_FILE_NAME];
     size_t body_len;
 } kcp_client_recv_meta_t;
+typedef struct kcp_client_state {
+    int connected;
+    int registered;
+    uint32_t server_idle_ms;
+    char last_server_error[256];
+} kcp_client_state_t;
 
 kcp_client_t *kcp_client_dial_with_options(const char *server_addr, const char *dial_addr, const char *peer_id, const char *bind_ip, const char *bind_device, const kcp_conn_options_t *options, latency_logger_t *logger, kcp_packet_debug_logger_t *packet_logger, kcp_session_stats_logger_t *stats_logger, int stats_interval_ms);
 kcp_client_t *kcp_client_dial(const char *server_addr, const char *dial_addr, const char *peer_id, const char *bind_ip, const char *bind_device, latency_logger_t *logger, kcp_packet_debug_logger_t *packet_logger, kcp_session_stats_logger_t *stats_logger, int stats_interval_ms);
@@ -27,7 +33,8 @@ int kcp_client_receive_timed(kcp_client_t *client, message_t *out_msg, int timeo
 int kcp_client_receive(kcp_client_t *client, message_t *out_msg);
 int kcp_client_receive_binary_into(kcp_client_t *client, void *buffer, size_t buffer_len, kcp_client_recv_meta_t *out_meta, int timeout_ms);
 int kcp_client_persist_message(kcp_client_t *client, const message_t *msg, const char *inbox_dir, char *out_path, size_t out_path_len);
-int kcp_client_metrics_snapshot(kcp_client_t *client, kcp_conn_metrics_t *out_metrics);
+void kcp_client_state_snapshot(kcp_client_t *client, kcp_client_state_t *out_state);
+void kcp_client_runtime_stats_snapshot(kcp_client_t *client, kcp_runtime_stats_t *out_stats);
 int kcp_client_close(kcp_client_t *client);
 void kcp_client_free(kcp_client_t *client);
 

include/peer_udp_client.h

@@ -8,12 +8,24 @@ extern "C" {
 #endif
 
 typedef struct udp_client udp_client_t;
+typedef struct udp_client_recv_meta {
+    message_type_t type;
+    uint64_t id;
+    char from[OMNI_MAX_PEER_ID];
+    char to[OMNI_MAX_PEER_ID];
+    char file_name[OMNI_MAX_FILE_NAME];
+    size_t body_len;
+} udp_client_recv_meta_t;
 
+udp_client_t *udp_client_dial_with_options(const char *server_addr, const char *peer_id, const char *bind_ip, const char *bind_device, latency_logger_t *logger, tx_timestamp_debug_logger_t *debug_logger, int enable_timestamping);
 udp_client_t *udp_client_dial(const char *server_addr, const char *peer_id, const char *bind_ip, latency_logger_t *logger, tx_timestamp_debug_logger_t *debug_logger, int enable_timestamping);
 const char *udp_client_id(const udp_client_t *client);
 int udp_client_send_text(udp_client_t *client, const char *to, const char *text);
+int udp_client_send_binary(udp_client_t *client, const char *to, const void *data, size_t data_len);
 int udp_client_send_file_path(udp_client_t *client, const char *to, const char *path);
+int udp_client_receive_timed(udp_client_t *client, message_t *out_msg, int timeout_ms);
 int udp_client_receive(udp_client_t *client, message_t *out_msg);
+int udp_client_receive_into(udp_client_t *client, void *buffer, size_t buffer_len, udp_client_recv_meta_t *out_meta, int timeout_ms);
 int udp_client_persist_message(udp_client_t *client, const message_t *msg, const char *inbox_dir, char *out_path, size_t out_path_len);
 int udp_client_close(udp_client_t *client);
 void udp_client_free(udp_client_t *client);

include/server_kcp_hub.h

@@ -14,6 +14,7 @@ int kcp_hub_serve_listener(kcp_hub_t *hub, kcp_listener_t *listener);
 int kcp_hub_serve_session(kcp_hub_t *hub, kcp_conn_t *conn);
 
 int kcp_hub_set_relay(kcp_hub_t *hub, int relay_fd, const struct sockaddr *peer_addr, socklen_t peer_addr_len, int learn_peer);
+int kcp_hub_set_telemetry(kcp_hub_t *hub, const char *peer_id, int interval_ms);
 int kcp_hub_serve_relay(kcp_hub_t *hub);
 
 int kcp_hub_close(kcp_hub_t *hub);

include/transport_kcp.h

@@ -34,6 +34,14 @@ extern "C" {
 #define KCP_VIDEO_RCV_WND 256
 #define KCP_VIDEO_MTU 1400
 
+#define KCP_TELEMETRY_NODELAY 0
+#define KCP_TELEMETRY_INTERVAL_MS 50
+#define KCP_TELEMETRY_RESEND 0
+#define KCP_TELEMETRY_NC 0
+#define KCP_TELEMETRY_SND_WND 64
+#define KCP_TELEMETRY_RCV_WND 64
+#define KCP_TELEMETRY_MTU 1400
+
 #define KCP_NODELAY KCP_DEFAULT_NODELAY
 #define KCP_INTERVAL KCP_DEFAULT_INTERVAL_MS
 #define KCP_RESEND KCP_DEFAULT_RESEND
@@ -43,32 +51,27 @@ extern "C" {
 
 typedef struct kcp_conn kcp_conn_t;
 typedef struct kcp_listener kcp_listener_t;
-typedef struct kcp_conn_metrics {
+typedef struct kcp_runtime_stats {
     int connected;
-    int has_conv;
     uint32_t conv;
-    char local_addr[OMNI_MAX_ADDR_TEXT];
-    char remote_addr[OMNI_MAX_ADDR_TEXT];
     uint32_t rto_ms;
     int32_t srtt_ms;
     int32_t srttvar_ms;
-    uint64_t bytes_sent;
-    uint64_t bytes_received;
-    uint64_t in_pkts;
-    uint64_t out_pkts;
-    uint64_t in_segs;
-    uint64_t out_segs;
-    uint64_t retrans_segs;
-    uint64_t fast_retrans_segs;
-    uint64_t early_retrans_segs;
-    uint64_t lost_segs;
-    uint64_t repeat_segs;
-    uint64_t in_errs;
-    uint64_t kcp_in_errs;
-    uint64_t ring_buffer_snd_queue;
-    uint64_t ring_buffer_rcv_queue;
-    uint64_t ring_buffer_snd_buffer;
-} kcp_conn_metrics_t;
+    uint32_t snd_wnd;
+    uint32_t rmt_wnd;
+    uint32_t inflight;
+    uint32_t window_limit;
+    double window_pressure_pct;
+    uint32_t snd_queue;
+    uint32_t rcv_queue;
+    uint32_t snd_buffer;
+    uint64_t out_segs_total;
+    uint64_t retrans_total;
+    uint64_t fast_retrans_total;
+    uint64_t lost_total;
+    uint64_t repeat_total;
+    uint32_t xmit_total;
+} kcp_runtime_stats_t;
 typedef struct kcp_conn_options {
     int nodelay;
     int interval_ms;
@@ -82,6 +85,7 @@ typedef struct kcp_conn_options {
 void kcp_conn_options_init(kcp_conn_options_t *options);
 void kcp_conn_options_set_control_defaults(kcp_conn_options_t *options);
 void kcp_conn_options_set_video_defaults(kcp_conn_options_t *options);
+void kcp_conn_options_set_telemetry_defaults(kcp_conn_options_t *options);
 
 kcp_conn_t *kcp_conn_dial_with_options(const char *server_addr, const char *bind_ip, const char *bind_device, const kcp_conn_options_t *options, kcp_packet_debug_logger_t *packet_logger, latency_logger_t *logger, const char *node_role, const char *node_id, kcp_session_stats_logger_t *stats_logger, int stats_interval_ms);
 kcp_conn_t *kcp_conn_dial(const char *server_addr, const char *bind_ip, const char *bind_device, kcp_packet_debug_logger_t *packet_logger, latency_logger_t *logger, const char *node_role, const char *node_id, kcp_session_stats_logger_t *stats_logger, int stats_interval_ms);
@@ -94,7 +98,8 @@ int kcp_conn_close(kcp_conn_t *conn);
 void kcp_conn_free(kcp_conn_t *conn);
 uint32_t kcp_conn_conv(const kcp_conn_t *conn);
 int kcp_conn_local_addr(const kcp_conn_t *conn, struct sockaddr_storage *addr, socklen_t *addr_len);
-int kcp_conn_metrics_snapshot(kcp_conn_t *conn, kcp_conn_metrics_t *out_metrics);
+int kcp_conn_remote_addr(const kcp_conn_t *conn, struct sockaddr_storage *addr, socklen_t *addr_len);
+void kcp_conn_runtime_stats_snapshot(kcp_conn_t *conn, kcp_runtime_stats_t *out_stats);
 
 kcp_listener_t *kcp_listener_listen(const char *listen_addr, const char *bind_device, kcp_packet_debug_logger_t *packet_logger, const char *node_role, const char *node_id);
 kcp_conn_t *kcp_listener_accept(kcp_listener_t *listener);

include/video_pipeline.h

@@ -0,0 +1,76 @@
+#ifndef OMNI_VIDEO_PIPELINE_H
+#define OMNI_VIDEO_PIPELINE_H
+
+#include <pthread.h>
+#include <signal.h>
+#include <stdint.h>
+
+#include "gps_buffer.h"
+#include "peer_kcp_client.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct video_pipeline_packet_metadata {
+    uint64_t timestamp_ms;
+    double latitude;
+    double longitude;
+} video_pipeline_packet_metadata_t;
+
+typedef void (*video_pipeline_progress_fn)(void *context);
+
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+_Static_assert(sizeof(video_pipeline_packet_metadata_t) == 24, "video trailer metadata must be 24 bytes");
+#endif
+
+typedef struct video_pipeline_config {
+    const char *camera_device;
+    const char *server_addr;
+    const char *relay_via;
+    const char *bind_ip;
+    const char *bind_device;
+    const char *peer_id;
+    const char *target_peer;
+    int capture_width;
+    int capture_height;
+    int output_width;
+    int output_height;
+    int max_frames;
+    int enable_timing_logs;
+    int soft_backpressure_segments;
+    int hard_backpressure_segments;
+    int hard_backpressure_hold_ms;
+    video_pipeline_progress_fn progress_callback;
+    void *progress_context;
+} video_pipeline_config_t;
+
+typedef struct video_pipeline_stats {
+    pthread_mutex_t mutex;
+    uint64_t frames_sent;
+    uint64_t bytes_sent;
+    uint64_t send_errors;
+    uint64_t backpressure_drops;
+    uint64_t backlog_resets;
+    uint64_t last_frame_bytes;
+    uint32_t last_backlog_segments;
+    int connected;
+    char last_error[256];
+    char last_backlog_reason[128];
+    kcp_runtime_stats_t transport;
+} video_pipeline_stats_t;
+
+#define VIDEO_PIPELINE_RUN_RETRY_IMMEDIATE 2
+
+void video_pipeline_config_init(video_pipeline_config_t *config);
+void video_pipeline_config_load_env(video_pipeline_config_t *config);
+int video_pipeline_stats_init(video_pipeline_stats_t *stats);
+void video_pipeline_stats_destroy(video_pipeline_stats_t *stats);
+void video_pipeline_stats_snapshot(video_pipeline_stats_t *stats, video_pipeline_stats_t *out_stats);
+int video_pipeline_run(const video_pipeline_config_t *config, video_pipeline_stats_t *stats, volatile sig_atomic_t *stop_requested);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

python/omnisocket/__init__.py

@@ -6,6 +6,7 @@ try:
         MSG_TYPE_REGISTER,
         MSG_TYPE_TEXT,
         Session,
+        UdpSession,
     )
 except ImportError as exc:
     raise ImportError(
@@ -32,8 +33,19 @@ VIDEO_DEFAULTS = {
     "mtu": 1400,
 }
 
+TELEMETRY_DEFAULTS = {
+    "nodelay": 0,
+    "interval_ms": 50,
+    "resend": 0,
+    "nc": 0,
+    "sndwnd": 64,
+    "rcvwnd": 64,
+    "mtu": 1400,
+}
+
 __all__ = [
     "CONTROL_DEFAULTS",
+    "TELEMETRY_DEFAULTS",
     "VIDEO_DEFAULTS",
     "MSG_TYPE_BINARY",
     "MSG_TYPE_ERROR",
@@ -41,4 +53,5 @@ __all__ = [
     "MSG_TYPE_REGISTER",
     "MSG_TYPE_TEXT",
     "Session",
+    "UdpSession",
 ]

python/omnisocket/_omnisocket.c

@@ -8,6 +8,11 @@ typedef struct PyOmniSession {
     omnisocket_session_t session;
 } PyOmniSession;
 
+typedef struct PyOmniUdpSession {
+    PyObject_HEAD
+    omnisocket_udp_session_t session;
+} PyOmniUdpSession;
+
 PyDoc_STRVAR(
     PyOmniSession_recv_doc,
     "recv(timeout_ms=-1) -> (from_peer, msg_type, payload) | None"
@@ -22,12 +27,118 @@ PyDoc_STRVAR(
     "current frame has already been consumed and is lost."
 );
 
-PyDoc_STRVAR(
-    PyOmniSession_kcp_metrics_doc,
-    "kcp_metrics() -> dict\n"
-    "\n"
-    "Return a snapshot of low-level KCP metrics for the current session."
-);
+static PyObject *build_recv_result(const message_t *msg) {
+    PyObject *body = NULL;
+    PyObject *result = NULL;
+
+    body = PyBytes_FromStringAndSize((const char *) msg->body, (Py_ssize_t) msg->body_len);
+    if (body == NULL) {
+        return NULL;
+    }
+    result = Py_BuildValue("(siO)", msg->from, (int) msg->type, body);
+    Py_DECREF(body);
+    return result;
+}
+
+static PyObject *build_recv_meta_dict(
+    const char *from_peer,
+    const char *to_peer,
+    const char *file_name,
+    int msg_type,
+    unsigned long long message_id,
+    unsigned long long body_len
+) {
+    return Py_BuildValue(
+        "{s:s,s:s,s:s,s:i,s:K,s:K}",
+        "from",
+        from_peer,
+        "to",
+        to_peer,
+        "file_name",
+        file_name,
+        "msg_type",
+        msg_type,
+        "message_id",
+        message_id,
+        "body_len",
+        body_len
+    );
+}
+
+static PyObject *build_stats_dict(const omnisocket_session_stats_t *stats) {
+    return Py_BuildValue(
+        "{s:K,s:K,s:K,s:K,s:K,s:K,s:K,s:i,s:i,s:s}",
+        "send_calls",
+        (unsigned long long) stats->send_calls,
+        "send_bytes",
+        (unsigned long long) stats->send_bytes,
+        "send_errors",
+        (unsigned long long) stats->send_errors,
+        "recv_calls",
+        (unsigned long long) stats->recv_calls,
+        "recv_bytes",
+        (unsigned long long) stats->recv_bytes,
+        "recv_timeouts",
+        (unsigned long long) stats->recv_timeouts,
+        "recv_errors",
+        (unsigned long long) stats->recv_errors,
+        "connected",
+        stats->connected,
+        "registered",
+        stats->registered,
+        "last_server_error",
+        stats->last_server_error
+    );
+}
+
+static PyObject *build_kcp_stats_dict(const omnisocket_session_kcp_stats_t *stats) {
+    PyObject *dict = PyDict_New();
+    PyObject *value = NULL;
+
+    if (dict == NULL) {
+        return NULL;
+    }
+
+#define SET_KCP_STAT(key, expr)                      \
+    do {                                            \
+        value = (expr);                             \
+        if (value == NULL) {                        \
+            Py_DECREF(dict);                        \
+            return NULL;                            \
+        }                                           \
+        if (PyDict_SetItemString(dict, (key), value) != 0) { \
+            Py_DECREF(value);                       \
+            Py_DECREF(dict);                        \
+            return NULL;                            \
+        }                                           \
+        Py_DECREF(value);                           \
+        value = NULL;                               \
+    } while (0)
+
+    SET_KCP_STAT("connected", PyLong_FromLong(stats->connected));
+    SET_KCP_STAT("conv", PyLong_FromUnsignedLong(stats->conv));
+    SET_KCP_STAT("rto_ms", PyLong_FromUnsignedLong(stats->rto_ms));
+    SET_KCP_STAT("srtt_ms", PyLong_FromLong(stats->srtt_ms));
+    SET_KCP_STAT("srttvar_ms", PyLong_FromLong(stats->srttvar_ms));
+    SET_KCP_STAT("snd_wnd", PyLong_FromUnsignedLong(stats->snd_wnd));
+    SET_KCP_STAT("rmt_wnd", PyLong_FromUnsignedLong(stats->rmt_wnd));
+    SET_KCP_STAT("inflight", PyLong_FromUnsignedLong(stats->inflight));
+    SET_KCP_STAT("window_limit", PyLong_FromUnsignedLong(stats->window_limit));
+    SET_KCP_STAT("window_pressure_pct", PyFloat_FromDouble(stats->window_pressure_pct));
+    SET_KCP_STAT("snd_queue", PyLong_FromUnsignedLong(stats->snd_queue));
+    SET_KCP_STAT("rcv_queue", PyLong_FromUnsignedLong(stats->rcv_queue));
+    SET_KCP_STAT("snd_buffer", PyLong_FromUnsignedLong(stats->snd_buffer));
+    SET_KCP_STAT("out_segs_total", PyLong_FromUnsignedLongLong((unsigned long long) stats->out_segs_total));
+    SET_KCP_STAT("retrans_total", PyLong_FromUnsignedLongLong((unsigned long long) stats->retrans_total));
+    SET_KCP_STAT("fast_retrans_total", PyLong_FromUnsignedLongLong((unsigned long long) stats->fast_retrans_total));
+    SET_KCP_STAT("lost_total", PyLong_FromUnsignedLongLong((unsigned long long) stats->lost_total));
+    SET_KCP_STAT("repeat_total", PyLong_FromUnsignedLongLong((unsigned long long) stats->repeat_total));
+    SET_KCP_STAT("xmit_total", PyLong_FromUnsignedLong(stats->xmit_total));
+
+#undef SET_KCP_STAT
+
+    return dict;
+}
 
 static PyObject *PyOmniSession_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) {
     PyOmniSession *self;
@@ -172,7 +283,6 @@ static PyObject *PyOmniSession_recv(PyOmniSession *self, PyObject *args, PyObjec
     int timeout_ms = -1;
     int rc;
     message_t msg;
-    PyObject *body = NULL;
     PyObject *result = NULL;
     static char *kwlist[] = {"timeout_ms", NULL};
 
@@ -194,13 +304,7 @@ static PyObject *PyOmniSession_recv(PyOmniSession *self, PyObject *args, PyObjec
         return PyErr_SetFromErrno(PyExc_OSError);
     }
 
-    body = PyBytes_FromStringAndSize((const char *) msg.body, (Py_ssize_t) msg.body_len);
-    if (body == NULL) {
-        protocol_message_clear(&msg);
-        return NULL;
-    }
-    result = Py_BuildValue("(siO)", msg.from, (int) msg.type, body);
-    Py_DECREF(body);
+    result = build_recv_result(&msg);
     protocol_message_clear(&msg);
     return result;
 }
@@ -244,19 +348,12 @@ static PyObject *PyOmniSession_recv_into(PyOmniSession *self, PyObject *args, Py
         return PyErr_SetFromErrno(PyExc_OSError);
     }
 
-    result = Py_BuildValue(
-        "{s:s,s:s,s:s,s:i,s:K,s:K}",
-        "from",
+    result = build_recv_meta_dict(
         meta.from,
-        "to",
         meta.to,
-        "file_name",
         meta.file_name,
-        "msg_type",
         (int) meta.type,
-        "message_id",
         (unsigned long long) meta.id,
-        "body_len",
         (unsigned long long) meta.body_len
     );
     return result;
@@ -267,86 +364,15 @@ static PyObject *PyOmniSession_stats(PyOmniSession *self, PyObject *Py_UNUSED(ig
 
     memset(&stats, 0, sizeof(stats));
     omnisocket_session_stats_snapshot(&self->session, &stats);
-    return Py_BuildValue(
-        "{s:K,s:K,s:K,s:K,s:K,s:K,s:K,s:i}",
-        "send_calls",
-        (unsigned long long) stats.send_calls,
-        "send_bytes",
-        (unsigned long long) stats.send_bytes,
-        "send_errors",
-        (unsigned long long) stats.send_errors,
-        "recv_calls",
-        (unsigned long long) stats.recv_calls,
-        "recv_bytes",
-        (unsigned long long) stats.recv_bytes,
-        "recv_timeouts",
-        (unsigned long long) stats.recv_timeouts,
-        "recv_errors",
-        (unsigned long long) stats.recv_errors,
-        "connected",
-        stats.connected
-    );
+    return build_stats_dict(&stats);
 }
 
-static PyObject *PyOmniSession_kcp_metrics(PyOmniSession *self, PyObject *Py_UNUSED(ignored)) {
-    omnisocket_session_kcp_metrics_t metrics;
+static PyObject *PyOmniSession_kcp_stats(PyOmniSession *self, PyObject *Py_UNUSED(ignored)) {
+    omnisocket_session_kcp_stats_t stats;
 
-    memset(&metrics, 0, sizeof(metrics));
-    if (omnisocket_session_kcp_metrics_snapshot(&self->session, &metrics) != 0) {
-        return PyErr_SetFromErrno(PyExc_OSError);
-    }
-
-    return Py_BuildValue(
-        "{s:i,s:i,s:I,s:s,s:s,s:I,s:i,s:i,s:K,s:K,s:K,s:K,s:K,s:K,s:K,s:K,s:K,s:K,s:K,s:K,s:K,s:K,s:K}",
-        "connected",
-        metrics.connected,
-        "has_conv",
-        metrics.has_conv,
-        "conv",
-        metrics.conv,
-        "local_addr",
-        metrics.local_addr,
-        "remote_addr",
-        metrics.remote_addr,
-        "rto_ms",
-        metrics.rto_ms,
-        "srtt_ms",
-        metrics.srtt_ms,
-        "srttvar_ms",
-        metrics.srttvar_ms,
-        "bytes_sent",
-        (unsigned long long) metrics.bytes_sent,
-        "bytes_received",
-        (unsigned long long) metrics.bytes_received,
-        "in_pkts",
-        (unsigned long long) metrics.in_pkts,
-        "out_pkts",
-        (unsigned long long) metrics.out_pkts,
-        "in_segs",
-        (unsigned long long) metrics.in_segs,
-        "out_segs",
-        (unsigned long long) metrics.out_segs,
-        "retrans_segs",
-        (unsigned long long) metrics.retrans_segs,
-        "fast_retrans_segs",
-        (unsigned long long) metrics.fast_retrans_segs,
-        "early_retrans_segs",
-        (unsigned long long) metrics.early_retrans_segs,
-        "lost_segs",
-        (unsigned long long) metrics.lost_segs,
-        "repeat_segs",
-        (unsigned long long) metrics.repeat_segs,
-        "in_errs",
-        (unsigned long long) metrics.in_errs,
-        "kcp_in_errs",
-        (unsigned long long) metrics.kcp_in_errs,
-        "ring_buffer_snd_queue",
-        (unsigned long long) metrics.ring_buffer_snd_queue,
-        "ring_buffer_rcv_queue",
-        (unsigned long long) metrics.ring_buffer_rcv_queue,
-        "ring_buffer_snd_buffer",
-        (unsigned long long) metrics.ring_buffer_snd_buffer
-    );
+    memset(&stats, 0, sizeof(stats));
+    omnisocket_session_kcp_stats_snapshot(&self->session, &stats);
+    return build_kcp_stats_dict(&stats);
 }
 
 static PyMethodDef PyOmniSession_methods[] = {
@@ -356,7 +382,7 @@ static PyMethodDef PyOmniSession_methods[] = {
     {"recv", (PyCFunction) PyOmniSession_recv, METH_VARARGS | METH_KEYWORDS, PyOmniSession_recv_doc},
     {"recv_into", (PyCFunction) PyOmniSession_recv_into, METH_VARARGS | METH_KEYWORDS, PyOmniSession_recv_into_doc},
     {"stats", (PyCFunction) PyOmniSession_stats, METH_NOARGS, NULL},
-    {"kcp_metrics", (PyCFunction) PyOmniSession_kcp_metrics, METH_NOARGS, PyOmniSession_kcp_metrics_doc},
+    {"kcp_stats", (PyCFunction) PyOmniSession_kcp_stats, METH_NOARGS, NULL},
     {NULL, NULL, 0, NULL}
 };
 
@@ -364,6 +390,211 @@ static PyTypeObject PyOmniSessionType = {
     PyVarObject_HEAD_INIT(NULL, 0)
 };
 
+static PyObject *PyOmniUdpSession_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+    PyOmniUdpSession *self;
+    (void) args;
+    (void) kwargs;
+
+    self = (PyOmniUdpSession *) type->tp_alloc(type, 0);
+    if (self == NULL) {
+        return NULL;
+    }
+    if (omnisocket_udp_session_init(&self->session) != 0) {
+        type->tp_free((PyObject *) self);
+        return PyErr_SetFromErrno(PyExc_OSError);
+    }
+    return (PyObject *) self;
+}
+
+static void PyOmniUdpSession_dealloc(PyOmniUdpSession *self) {
+    omnisocket_udp_session_destroy(&self->session);
+    Py_TYPE(self)->tp_free((PyObject *) self);
+}
+
+static PyObject *PyOmniUdpSession_connect(PyOmniUdpSession *self, PyObject *args, PyObject *kwargs) {
+    const char *server_addr;
+    const char *peer_id;
+    const char *bind_ip = "";
+    const char *bind_device = "";
+    int enable_timestamping = 0;
+    int rc;
+
+    static char *kwlist[] = {
+        "server_addr",
+        "peer_id",
+        "bind_ip",
+        "bind_device",
+        "enable_timestamping",
+        NULL
+    };
+
+    if (!PyArg_ParseTupleAndKeywords(
+            args,
+            kwargs,
+            "ss|ssi",
+            kwlist,
+            &server_addr,
+            &peer_id,
+            &bind_ip,
+            &bind_device,
+            &enable_timestamping)) {
+        return NULL;
+    }
+
+    Py_BEGIN_ALLOW_THREADS
+    rc = omnisocket_udp_session_connect(
+        &self->session,
+        server_addr,
+        peer_id,
+        bind_ip,
+        bind_device,
+        enable_timestamping
+    );
+    Py_END_ALLOW_THREADS
+
+    if (rc != 0) {
+        return PyErr_SetFromErrno(PyExc_OSError);
+    }
+    Py_RETURN_NONE;
+}
+
+static PyObject *PyOmniUdpSession_close(PyOmniUdpSession *self, PyObject *Py_UNUSED(ignored)) {
+    int rc;
+
+    Py_BEGIN_ALLOW_THREADS
+    rc = omnisocket_udp_session_close(&self->session);
+    Py_END_ALLOW_THREADS
+
+    if (rc != 0) {
+        return PyErr_SetFromErrno(PyExc_OSError);
+    }
+    Py_RETURN_NONE;
+}
+
+static PyObject *PyOmniUdpSession_send(PyOmniUdpSession *self, PyObject *args, PyObject *kwargs) {
+    const char *to;
+    Py_buffer payload;
+    int rc;
+    static char *kwlist[] = {"to", "data", NULL};
+
+    memset(&payload, 0, sizeof(payload));
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sy*", kwlist, &to, &payload)) {
+        return NULL;
+    }
+
+    Py_BEGIN_ALLOW_THREADS
+    rc = omnisocket_udp_session_send(&self->session, to, payload.buf, (size_t) payload.len);
+    Py_END_ALLOW_THREADS
+
+    PyBuffer_Release(&payload);
+    if (rc != 0) {
+        return PyErr_SetFromErrno(PyExc_OSError);
+    }
+    Py_RETURN_NONE;
+}
+
+static PyObject *PyOmniUdpSession_recv(PyOmniUdpSession *self, PyObject *args, PyObject *kwargs) {
+    int timeout_ms = -1;
+    int rc;
+    message_t msg;
+    PyObject *result = NULL;
+    static char *kwlist[] = {"timeout_ms", NULL};
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|i", kwlist, &timeout_ms)) {
+        return NULL;
+    }
+
+    protocol_message_init(&msg);
+    Py_BEGIN_ALLOW_THREADS
+    rc = omnisocket_udp_session_recv(&self->session, &msg, timeout_ms);
+    Py_END_ALLOW_THREADS
+
+    if (rc == 1) {
+        protocol_message_clear(&msg);
+        Py_RETURN_NONE;
+    }
+    if (rc != 0) {
+        protocol_message_clear(&msg);
+        return PyErr_SetFromErrno(PyExc_OSError);
+    }
+
+    result = build_recv_result(&msg);
+    protocol_message_clear(&msg);
+    return result;
+}
+
+static PyObject *PyOmniUdpSession_recv_into(PyOmniUdpSession *self, PyObject *args, PyObject *kwargs) {
+    PyObject *buffer_obj;
+    Py_buffer view;
+    int timeout_ms = -1;
+    int rc;
+    udp_client_recv_meta_t meta;
+    PyObject *result = NULL;
+    static char *kwlist[] = {"buffer", "timeout_ms", NULL};
+
+    memset(&view, 0, sizeof(view));
+    memset(&meta, 0, sizeof(meta));
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|i", kwlist, &buffer_obj, &timeout_ms)) {
+        return NULL;
+    }
+    if (PyObject_GetBuffer(buffer_obj, &view, PyBUF_WRITABLE) != 0) {
+        return NULL;
+    }
+
+    Py_BEGIN_ALLOW_THREADS
+    rc = omnisocket_udp_session_recv_into(&self->session, view.buf, (size_t) view.len, &meta, timeout_ms);
+    Py_END_ALLOW_THREADS
+
+    PyBuffer_Release(&view);
+    if (rc == 1) {
+        Py_RETURN_NONE;
+    }
+    if (rc == 2) {
+        PyErr_Format(
+            PyExc_BufferError,
+            "buffer too small: need %zu bytes; current frame was already consumed and dropped",
+            meta.body_len
+        );
+        return NULL;
+    }
+    if (rc != 0) {
+        return PyErr_SetFromErrno(PyExc_OSError);
+    }
+
+    result = build_recv_meta_dict(
+        meta.from,
+        meta.to,
+        meta.file_name,
+        (int) meta.type,
+        (unsigned long long) meta.id,
+        (unsigned long long) meta.body_len
+    );
+    return result;
+}
+
+static PyObject *PyOmniUdpSession_stats(PyOmniUdpSession *self, PyObject *Py_UNUSED(ignored)) {
+    omnisocket_session_stats_t stats;
+
+    memset(&stats, 0, sizeof(stats));
+    omnisocket_udp_session_stats_snapshot(&self->session, &stats);
+    return build_stats_dict(&stats);
+}
+
+static PyMethodDef PyOmniUdpSession_methods[] = {
+    {"connect", (PyCFunction) PyOmniUdpSession_connect, METH_VARARGS | METH_KEYWORDS, NULL},
+    {"close", (PyCFunction) PyOmniUdpSession_close, METH_NOARGS, NULL},
+    {"send", (PyCFunction) PyOmniUdpSession_send, METH_VARARGS | METH_KEYWORDS, NULL},
+    {"recv", (PyCFunction) PyOmniUdpSession_recv, METH_VARARGS | METH_KEYWORDS, PyOmniSession_recv_doc},
+    {"recv_into", (PyCFunction) PyOmniUdpSession_recv_into, METH_VARARGS | METH_KEYWORDS, PyOmniSession_recv_into_doc},
+    {"stats", (PyCFunction) PyOmniUdpSession_stats, METH_NOARGS, NULL},
+    {NULL, NULL, 0, NULL}
+};
+
+static PyTypeObject PyOmniUdpSessionType = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+};
+
 static PyModuleDef omnisocket_module = {
     PyModuleDef_HEAD_INIT,
     .m_name = "_omnisocket",
@@ -384,6 +615,17 @@ PyMODINIT_FUNC PyInit__omnisocket(void) {
         return NULL;
     }
 
+    PyOmniUdpSessionType.tp_name = "omnisocket.UdpSession";
+    PyOmniUdpSessionType.tp_basicsize = sizeof(PyOmniUdpSession);
+    PyOmniUdpSessionType.tp_flags = Py_TPFLAGS_DEFAULT;
+    PyOmniUdpSessionType.tp_new = PyOmniUdpSession_new;
+    PyOmniUdpSessionType.tp_dealloc = (destructor) PyOmniUdpSession_dealloc;
+    PyOmniUdpSessionType.tp_methods = PyOmniUdpSession_methods;
+
+    if (PyType_Ready(&PyOmniUdpSessionType) < 0) {
+        return NULL;
+    }
+
     module = PyModule_Create(&omnisocket_module);
     if (module == NULL) {
         return NULL;
@@ -396,6 +638,13 @@ PyMODINIT_FUNC PyInit__omnisocket(void) {
         return NULL;
     }
 
+    Py_INCREF(&PyOmniUdpSessionType);
+    if (PyModule_AddObject(module, "UdpSession", (PyObject *) &PyOmniUdpSessionType) != 0) {
+        Py_DECREF(&PyOmniUdpSessionType);
+        Py_DECREF(module);
+        return NULL;
+    }
+
     if (PyModule_AddIntConstant(module, "MSG_TYPE_TEXT", MSG_TYPE_TEXT) != 0 ||
         PyModule_AddIntConstant(module, "MSG_TYPE_FILE", MSG_TYPE_FILE) != 0 ||
         PyModule_AddIntConstant(module, "MSG_TYPE_REGISTER", MSG_TYPE_REGISTER) != 0 ||

python/omnisocket/omnisocket_client.c

@@ -1,5 +1,33 @@
 #include "omnisocket_client.h"
 
+static void omnisocket_session_sync_client_state_locked(omnisocket_session_t *session, kcp_client_t *client) {
+    kcp_client_state_t client_state;
+
+    if (session == NULL) {
+        return;
+    }
+    memset(&client_state, 0, sizeof(client_state));
+    if (client != NULL) {
+        kcp_client_state_snapshot(client, &client_state);
+    }
+    session->stats.connected = client_state.connected;
+    session->stats.registered = client_state.registered;
+    snprintf(
+        session->stats.last_server_error,
+        sizeof(session->stats.last_server_error),
+        "%s",
+        client_state.last_server_error
+    );
+}
+
+static void omnisocket_session_mark_disconnected_locked(omnisocket_session_t *session) {
+    if (session == NULL) {
+        return;
+    }
+    session->stats.connected = 0;
+    session->stats.registered = 0;
+}
+
 int omnisocket_session_init(omnisocket_session_t *session) {
     int rc;
 
@@ -97,7 +125,7 @@ int omnisocket_session_connect(
         return -1;
     }
     session->client = client;
-    session->stats.connected = 1;
+    omnisocket_session_sync_client_state_locked(session, client);
     pthread_mutex_unlock(&session->mutex);
     return 0;
 }
@@ -119,7 +147,7 @@ int omnisocket_session_close(omnisocket_session_t *session) {
         session->closing = 1;
         session->client = NULL;
     }
-    session->stats.connected = 0;
+    omnisocket_session_mark_disconnected_locked(session);
     pthread_mutex_unlock(&session->mutex);
 
     if (client != NULL) {
@@ -158,6 +186,7 @@ int omnisocket_session_send(omnisocket_session_t *session, const char *to, const
     } else {
         session->stats.send_errors += 1;
     }
+    omnisocket_session_sync_client_state_locked(session, client);
     if (session->active_ops > 0) {
         session->active_ops -= 1;
     }
@@ -190,6 +219,7 @@ int omnisocket_session_recv(omnisocket_session_t *session, message_t *out_msg, i
     } else {
         session->stats.recv_errors += 1;
     }
+    omnisocket_session_sync_client_state_locked(session, client);
     if (session->active_ops > 0) {
         session->active_ops -= 1;
     }
@@ -228,6 +258,7 @@ int omnisocket_session_recv_into(
     } else {
         session->stats.recv_errors += 1;
     }
+    omnisocket_session_sync_client_state_locked(session, client);
     if (session->active_ops > 0) {
         session->active_ops -= 1;
     }
@@ -247,36 +278,198 @@ void omnisocket_session_stats_snapshot(omnisocket_session_t *session, omnisocket
     pthread_mutex_unlock(&session->mutex);
 }
 
-int omnisocket_session_kcp_metrics_snapshot(
-    omnisocket_session_t *session,
-    omnisocket_session_kcp_metrics_t *out_metrics
-) {
-    kcp_client_t *client = NULL;
-    kcp_conn_metrics_t metrics;
-    int rc = 0;
+void omnisocket_session_kcp_stats_snapshot(omnisocket_session_t *session, omnisocket_session_kcp_stats_t *out_stats) {
+    kcp_runtime_stats_t runtime_stats;
 
-    if (session == NULL || out_metrics == NULL) {
+    if (session == NULL || out_stats == NULL) {
+        return;
+    }
+
+    memset(&runtime_stats, 0, sizeof(runtime_stats));
+    pthread_mutex_lock(&session->mutex);
+    if (session->client != NULL) {
+        kcp_client_runtime_stats_snapshot(session->client, &runtime_stats);
+    }
+    pthread_mutex_unlock(&session->mutex);
+
+    memset(out_stats, 0, sizeof(*out_stats));
+    out_stats->connected = runtime_stats.connected;
+    out_stats->conv = runtime_stats.conv;
+    out_stats->rto_ms = runtime_stats.rto_ms;
+    out_stats->srtt_ms = runtime_stats.srtt_ms;
+    out_stats->srttvar_ms = runtime_stats.srttvar_ms;
+    out_stats->snd_wnd = runtime_stats.snd_wnd;
+    out_stats->rmt_wnd = runtime_stats.rmt_wnd;
+    out_stats->inflight = runtime_stats.inflight;
+    out_stats->window_limit = runtime_stats.window_limit;
+    out_stats->window_pressure_pct = runtime_stats.window_pressure_pct;
+    out_stats->snd_queue = runtime_stats.snd_queue;
+    out_stats->rcv_queue = runtime_stats.rcv_queue;
+    out_stats->snd_buffer = runtime_stats.snd_buffer;
+    out_stats->out_segs_total = runtime_stats.out_segs_total;
+    out_stats->retrans_total = runtime_stats.retrans_total;
+    out_stats->fast_retrans_total = runtime_stats.fast_retrans_total;
+    out_stats->lost_total = runtime_stats.lost_total;
+    out_stats->repeat_total = runtime_stats.repeat_total;
+    out_stats->xmit_total = runtime_stats.xmit_total;
+}
+
+int omnisocket_udp_session_init(omnisocket_udp_session_t *session) {
+    int rc;
+
+    if (session == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+    memset(session, 0, sizeof(*session));
+    rc = pthread_mutex_init(&session->mutex, NULL);
+    if (rc != 0) {
+        errno = rc;
+        return -1;
+    }
+    rc = pthread_cond_init(&session->idle_cond, NULL);
+    if (rc != 0) {
+        pthread_mutex_destroy(&session->mutex);
+        errno = rc;
+        return -1;
+    }
+    return 0;
+}
+
+void omnisocket_udp_session_destroy(omnisocket_udp_session_t *session) {
+    if (session == NULL) {
+        return;
+    }
+    (void) omnisocket_udp_session_close(session);
+    pthread_cond_destroy(&session->idle_cond);
+    pthread_mutex_destroy(&session->mutex);
+}
+
+static int omnisocket_udp_session_begin_client_op(omnisocket_udp_session_t *session, udp_client_t **out_client) {
+    if (session == NULL || out_client == NULL) {
         errno = EINVAL;
         return -1;
     }
 
-    memset(out_metrics, 0, sizeof(*out_metrics));
+    pthread_mutex_lock(&session->mutex);
+    if (session->closing) {
+        pthread_mutex_unlock(&session->mutex);
+        errno = ECANCELED;
+        return -1;
+    }
+    if (session->client == NULL) {
+        pthread_mutex_unlock(&session->mutex);
+        errno = ENOTCONN;
+        return -1;
+    }
+    *out_client = session->client;
+    session->active_ops += 1;
+    pthread_mutex_unlock(&session->mutex);
+    return 0;
+}
+
+int omnisocket_udp_session_connect(
+    omnisocket_udp_session_t *session,
+    const char *server_addr,
+    const char *peer_id,
+    const char *bind_ip,
+    const char *bind_device,
+    int enable_timestamping
+) {
+    udp_client_t *client;
+
+    if (session == NULL || server_addr == NULL || peer_id == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
 
     pthread_mutex_lock(&session->mutex);
-    if (session->client != NULL && !session->closing) {
-        client = session->client;
-        session->active_ops += 1;
+    while (session->closing) {
+        pthread_cond_wait(&session->idle_cond, &session->mutex);
     }
+    if (session->client != NULL) {
+        pthread_mutex_unlock(&session->mutex);
+        errno = EISCONN;
+        return -1;
+    }
+    client = udp_client_dial_with_options(
+        server_addr,
+        peer_id,
+        bind_ip,
+        bind_device,
+        NULL,
+        NULL,
+        enable_timestamping
+    );
+    if (client == NULL) {
+        pthread_mutex_unlock(&session->mutex);
+        return -1;
+    }
+    session->client = client;
+    session->stats.connected = 1;
+    session->stats.registered = 1;
+    session->stats.last_server_error[0] = '\0';
+    pthread_mutex_unlock(&session->mutex);
+    return 0;
+}
+
+int omnisocket_udp_session_close(omnisocket_udp_session_t *session) {
+    udp_client_t *client;
+
+    if (session == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    pthread_mutex_lock(&session->mutex);
+    while (session->closing) {
+        pthread_cond_wait(&session->idle_cond, &session->mutex);
+    }
+    client = session->client;
+    if (client != NULL) {
+        session->closing = 1;
+        session->client = NULL;
+    }
+    session->stats.connected = 0;
+    session->stats.registered = 0;
     pthread_mutex_unlock(&session->mutex);
 
-    if (client == NULL) {
-        return 0;
+    if (client != NULL) {
+        udp_client_close(client);
+        pthread_mutex_lock(&session->mutex);
+        while (session->active_ops > 0) {
+            pthread_cond_wait(&session->idle_cond, &session->mutex);
+        }
+        pthread_mutex_unlock(&session->mutex);
+        udp_client_free(client);
+        pthread_mutex_lock(&session->mutex);
+        session->closing = 0;
+        pthread_cond_broadcast(&session->idle_cond);
+        pthread_mutex_unlock(&session->mutex);
+    }
+    return 0;
+}
+
+int omnisocket_udp_session_send(omnisocket_udp_session_t *session, const char *to, const void *data, size_t data_len) {
+    udp_client_t *client;
+    int rc;
+
+    if (session == NULL || to == NULL || (data == NULL && data_len > 0)) {
+        errno = EINVAL;
+        return -1;
     }
 
-    memset(&metrics, 0, sizeof(metrics));
-    rc = kcp_client_metrics_snapshot(client, &metrics);
-
+    if (omnisocket_udp_session_begin_client_op(session, &client) != 0) {
+        return -1;
+    }
+    rc = udp_client_send_binary(client, to, data, data_len);
     pthread_mutex_lock(&session->mutex);
+    if (rc == 0) {
+        session->stats.send_calls += 1;
+        session->stats.send_bytes += (uint64_t) data_len;
+    } else {
+        session->stats.send_errors += 1;
+    }
     if (session->active_ops > 0) {
         session->active_ops -= 1;
     }
@@ -284,34 +477,84 @@ int omnisocket_session_kcp_metrics_snapshot(
         pthread_cond_broadcast(&session->idle_cond);
     }
     pthread_mutex_unlock(&session->mutex);
+    return rc;
+}
 
-    if (rc != 0) {
-        return rc;
+int omnisocket_udp_session_recv(omnisocket_udp_session_t *session, message_t *out_msg, int timeout_ms) {
+    udp_client_t *client;
+    int rc;
+
+    if (session == NULL || out_msg == NULL) {
+        errno = EINVAL;
+        return -1;
     }
 
-    out_metrics->connected = metrics.connected;
-    out_metrics->has_conv = metrics.has_conv;
-    out_metrics->conv = metrics.conv;
-    snprintf(out_metrics->local_addr, sizeof(out_metrics->local_addr), "%s", metrics.local_addr);
-    snprintf(out_metrics->remote_addr, sizeof(out_metrics->remote_addr), "%s", metrics.remote_addr);
-    out_metrics->rto_ms = metrics.rto_ms;
-    out_metrics->srtt_ms = metrics.srtt_ms;
-    out_metrics->srttvar_ms = metrics.srttvar_ms;
-    out_metrics->bytes_sent = metrics.bytes_sent;
-    out_metrics->bytes_received = metrics.bytes_received;
-    out_metrics->in_pkts = metrics.in_pkts;
-    out_metrics->out_pkts = metrics.out_pkts;
-    out_metrics->in_segs = metrics.in_segs;
-    out_metrics->out_segs = metrics.out_segs;
-    out_metrics->retrans_segs = metrics.retrans_segs;
-    out_metrics->fast_retrans_segs = metrics.fast_retrans_segs;
-    out_metrics->early_retrans_segs = metrics.early_retrans_segs;
-    out_metrics->lost_segs = metrics.lost_segs;
-    out_metrics->repeat_segs = metrics.repeat_segs;
-    out_metrics->in_errs = metrics.in_errs;
-    out_metrics->kcp_in_errs = metrics.kcp_in_errs;
-    out_metrics->ring_buffer_snd_queue = metrics.ring_buffer_snd_queue;
-    out_metrics->ring_buffer_rcv_queue = metrics.ring_buffer_rcv_queue;
-    out_metrics->ring_buffer_snd_buffer = metrics.ring_buffer_snd_buffer;
-    return 0;
+    if (omnisocket_udp_session_begin_client_op(session, &client) != 0) {
+        return -1;
+    }
+    rc = udp_client_receive_timed(client, out_msg, timeout_ms);
+    pthread_mutex_lock(&session->mutex);
+    if (rc == 0) {
+        session->stats.recv_calls += 1;
+        session->stats.recv_bytes += (uint64_t) out_msg->body_len;
+    } else if (rc == 1) {
+        session->stats.recv_timeouts += 1;
+    } else {
+        session->stats.recv_errors += 1;
+    }
+    if (session->active_ops > 0) {
+        session->active_ops -= 1;
+    }
+    if (session->closing && session->active_ops == 0) {
+        pthread_cond_broadcast(&session->idle_cond);
+    }
+    pthread_mutex_unlock(&session->mutex);
+    return rc;
+}
+
+int omnisocket_udp_session_recv_into(
+    omnisocket_udp_session_t *session,
+    void *buffer,
+    size_t buffer_len,
+    udp_client_recv_meta_t *out_meta,
+    int timeout_ms
+) {
+    udp_client_t *client;
+    int rc;
+
+    if (session == NULL || out_meta == NULL || (buffer == NULL && buffer_len > 0)) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    if (omnisocket_udp_session_begin_client_op(session, &client) != 0) {
+        return -1;
+    }
+    rc = udp_client_receive_into(client, buffer, buffer_len, out_meta, timeout_ms);
+    pthread_mutex_lock(&session->mutex);
+    if (rc == 0) {
+        session->stats.recv_calls += 1;
+        session->stats.recv_bytes += (uint64_t) out_meta->body_len;
+    } else if (rc == 1) {
+        session->stats.recv_timeouts += 1;
+    } else {
+        session->stats.recv_errors += 1;
+    }
+    if (session->active_ops > 0) {
+        session->active_ops -= 1;
+    }
+    if (session->closing && session->active_ops == 0) {
+        pthread_cond_broadcast(&session->idle_cond);
+    }
+    pthread_mutex_unlock(&session->mutex);
+    return rc;
+}
+
+void omnisocket_udp_session_stats_snapshot(omnisocket_udp_session_t *session, omnisocket_session_stats_t *out_stats) {
+    if (session == NULL || out_stats == NULL) {
+        return;
+    }
+    pthread_mutex_lock(&session->mutex);
+    *out_stats = session->stats;
+    pthread_mutex_unlock(&session->mutex);
 }

python/omnisocket/omnisocket_client.h

@@ -2,6 +2,7 @@
 #define OMNISOCKET_PY_CLIENT_H
 
 #include "peer_kcp_client.h"
+#include "peer_udp_client.h"
 
 typedef struct omnisocket_session_stats {
     uint64_t send_calls;
@@ -12,34 +13,31 @@ typedef struct omnisocket_session_stats {
     uint64_t recv_timeouts;
     uint64_t recv_errors;
     int connected;
+    int registered;
+    char last_server_error[256];
 } omnisocket_session_stats_t;
 
-typedef struct omnisocket_session_kcp_metrics {
+typedef struct omnisocket_session_kcp_stats {
     int connected;
-    int has_conv;
     uint32_t conv;
-    char local_addr[OMNI_MAX_ADDR_TEXT];
-    char remote_addr[OMNI_MAX_ADDR_TEXT];
     uint32_t rto_ms;
     int32_t srtt_ms;
     int32_t srttvar_ms;
-    uint64_t bytes_sent;
-    uint64_t bytes_received;
-    uint64_t in_pkts;
-    uint64_t out_pkts;
-    uint64_t in_segs;
-    uint64_t out_segs;
-    uint64_t retrans_segs;
-    uint64_t fast_retrans_segs;
-    uint64_t early_retrans_segs;
-    uint64_t lost_segs;
-    uint64_t repeat_segs;
-    uint64_t in_errs;
-    uint64_t kcp_in_errs;
-    uint64_t ring_buffer_snd_queue;
-    uint64_t ring_buffer_rcv_queue;
-    uint64_t ring_buffer_snd_buffer;
-} omnisocket_session_kcp_metrics_t;
+    uint32_t snd_wnd;
+    uint32_t rmt_wnd;
+    uint32_t inflight;
+    uint32_t window_limit;
+    double window_pressure_pct;
+    uint32_t snd_queue;
+    uint32_t rcv_queue;
+    uint32_t snd_buffer;
+    uint64_t out_segs_total;
+    uint64_t retrans_total;
+    uint64_t fast_retrans_total;
+    uint64_t lost_total;
+    uint64_t repeat_total;
+    uint32_t xmit_total;
+} omnisocket_session_kcp_stats_t;
 
 typedef struct omnisocket_session {
     pthread_mutex_t mutex;
@@ -50,6 +48,15 @@ typedef struct omnisocket_session {
     omnisocket_session_stats_t stats;
 } omnisocket_session_t;
 
+typedef struct omnisocket_udp_session {
+    pthread_mutex_t mutex;
+    pthread_cond_t idle_cond;
+    udp_client_t *client;
+    size_t active_ops;
+    int closing;
+    omnisocket_session_stats_t stats;
+} omnisocket_udp_session_t;
+
 int omnisocket_session_init(omnisocket_session_t *session);
 void omnisocket_session_destroy(omnisocket_session_t *session);
 
@@ -74,9 +81,29 @@ int omnisocket_session_recv_into(
     int timeout_ms
 );
 void omnisocket_session_stats_snapshot(omnisocket_session_t *session, omnisocket_session_stats_t *out_stats);
-int omnisocket_session_kcp_metrics_snapshot(
-    omnisocket_session_t *session,
-    omnisocket_session_kcp_metrics_t *out_metrics
+void omnisocket_session_kcp_stats_snapshot(omnisocket_session_t *session, omnisocket_session_kcp_stats_t *out_stats);
+
+int omnisocket_udp_session_init(omnisocket_udp_session_t *session);
+void omnisocket_udp_session_destroy(omnisocket_udp_session_t *session);
+
+int omnisocket_udp_session_connect(
+    omnisocket_udp_session_t *session,
+    const char *server_addr,
+    const char *peer_id,
+    const char *bind_ip,
+    const char *bind_device,
+    int enable_timestamping
 );
+int omnisocket_udp_session_close(omnisocket_udp_session_t *session);
+int omnisocket_udp_session_send(omnisocket_udp_session_t *session, const char *to, const void *data, size_t data_len);
+int omnisocket_udp_session_recv(omnisocket_udp_session_t *session, message_t *out_msg, int timeout_ms);
+int omnisocket_udp_session_recv_into(
+    omnisocket_udp_session_t *session,
+    void *buffer,
+    size_t buffer_len,
+    udp_client_recv_meta_t *out_meta,
+    int timeout_ms
+);
+void omnisocket_udp_session_stats_snapshot(omnisocket_udp_session_t *session, omnisocket_session_stats_t *out_stats);
 
 #endif

python/omnisocket_a_side/__init__.py

@@ -1,9 +0,0 @@
-from pathlib import Path
-
-
-PACKAGE_ROOT = Path(__file__).resolve().parent
-PYTHON_ROOT = PACKAGE_ROOT.parent
-REPO_ROOT = PYTHON_ROOT.parent
-DEFAULT_SOCKET_PATH = "/tmp/omnisocket-a-side.sock"
-DEFAULT_CONFIG_PATH = REPO_ROOT / "config" / "a_side_omnidaemon.yaml"
-VERSION = "0.1.0"

python/omnisocket_a_side/__main__.py

@@ -1,5 +0,0 @@
-from .daemon import main
-
-
-if __name__ == "__main__":
-    main()

python/omnisocket_a_side/client.py

@@ -1,149 +0,0 @@
-"""Local Unix-domain HTTP client for the A-side OmniDaemon."""
-
-from __future__ import annotations
-
-import http.client
-import json
-import os
-import socket
-import threading
-from typing import Any
-
-from . import DEFAULT_SOCKET_PATH
-
-
-class OmniDaemonError(RuntimeError):
-    def __init__(self, message: str, status_code: int | None = None) -> None:
-        super().__init__(message)
-        self.status_code = status_code
-
-
-class UnixHTTPConnection(http.client.HTTPConnection):
-    def __init__(self, socket_path: str, timeout: float = 2.0) -> None:
-        super().__init__("localhost", timeout=timeout)
-        self.socket_path = socket_path
-
-    def connect(self) -> None:  # pragma: no cover - runtime depends on Linux socket support
-        if not hasattr(socket, "AF_UNIX"):
-            raise OSError("AF_UNIX sockets are not available on this platform")
-        self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
-        self.sock.settimeout(self.timeout)
-        self.sock.connect(self.socket_path)
-
-
-class OmniDaemonClient:
-    def __init__(self, socket_path: str | None = None, timeout: float = 2.0) -> None:
-        self.socket_path = socket_path or os.getenv("OMNIDAEMON_SOCKET", DEFAULT_SOCKET_PATH)
-        self.timeout = timeout
-        self._local = threading.local()
-
-    def get_health(self) -> dict[str, Any]:
-        return self._request_json("GET", "/v1/health")
-
-    def get_state(self) -> dict[str, Any]:
-        return self._request_json("GET", "/v1/state")
-
-    def get_video_frame(self) -> bytes:
-        return self._request_bytes("GET", "/v1/video/frame")
-
-    def get_control_status(self) -> dict[str, Any]:
-        return self._request_json("GET", "/v1/control/status")
-
-    def send_control_event(
-        self,
-        *,
-        source: str,
-        event_code: str,
-        drive_value: float = 1.0,
-        client_time_ms: int | None = None,
-    ) -> dict[str, Any]:
-        payload = {
-            "source": source,
-            "event_code": event_code,
-            "drive_value": float(drive_value),
-            "client_time_ms": client_time_ms,
-        }
-        return self._request_json("POST", "/v1/control/event", payload)
-
-    def close(self) -> None:
-        self._reset_connection()
-
-    def _request_json(
-        self,
-        method: str,
-        path: str,
-        payload: dict[str, Any] | None = None,
-    ) -> dict[str, Any]:
-        raw = self._request_bytes(method, path, payload)
-        if not raw:
-            return {}
-        try:
-            return json.loads(raw.decode("utf-8"))
-        except json.JSONDecodeError as error:
-            raise OmniDaemonError(f"invalid daemon JSON response: {error}") from error
-
-    def _request_bytes(
-        self,
-        method: str,
-        path: str,
-        payload: dict[str, Any] | None = None,
-    ) -> bytes:
-        body = b""
-        headers: dict[str, str] = {}
-        if payload is not None:
-            body = json.dumps(payload).encode("utf-8")
-            headers["Content-Type"] = "application/json"
-            headers["Content-Length"] = str(len(body))
-        headers.setdefault("Connection", "keep-alive")
-
-        for attempt in range(2):
-            connection = self._get_connection()
-            try:
-                connection.request(method, path, body=body, headers=headers)
-                response = connection.getresponse()
-                raw = response.read()
-            except FileNotFoundError as error:
-                self._reset_connection()
-                raise OmniDaemonError(
-                    f"daemon socket not found: {self.socket_path}"
-                ) from error
-            except (OSError, http.client.HTTPException) as error:
-                self._reset_connection()
-                if attempt == 0:
-                    continue
-                raise OmniDaemonError(
-                    f"daemon request failed via {self.socket_path}: {error}"
-                ) from error
-
-            if getattr(response, "will_close", False):
-                self._reset_connection()
-
-            if response.status >= 400:
-                message = raw.decode("utf-8", errors="replace").strip() or response.reason
-                try:
-                    parsed = json.loads(message)
-                    if isinstance(parsed, dict) and "error" in parsed:
-                        message = str(parsed["error"])
-                except json.JSONDecodeError:
-                    pass
-                raise OmniDaemonError(message, status_code=response.status)
-            return raw
-
-        raise OmniDaemonError(f"daemon request failed via {self.socket_path}: retry exhausted")
-
-    def _get_connection(self) -> UnixHTTPConnection:
-        connection = getattr(self._local, "connection", None)
-        if connection is None:
-            connection = UnixHTTPConnection(self.socket_path, timeout=self.timeout)
-            self._local.connection = connection
-        return connection
-
-    def _reset_connection(self) -> None:
-        connection = getattr(self._local, "connection", None)
-        if connection is None:
-            return
-        try:
-            connection.close()
-        except OSError:
-            pass
-        self._local.connection = None

python/omnisocket_a_side/control_codec.py

@@ -1,90 +0,0 @@
-"""Binary control packet codec shared by the daemon and local clients."""
-
-from __future__ import annotations
-
-from dataclasses import dataclass
-import struct
-import time
-
-
-CONTROL_PACKET_VERSION = 1
-CONTROL_PACKET_STRUCT = struct.Struct("!BBHIfQ")
-
-EVENT_NAME_TO_ID = {
-    "pose_home": 1,
-    "pose_hold": 2,
-    "mode_stride": 3,
-    "surge_up": 6,
-    "surge_down": 7,
-    "sway_left": 8,
-    "sway_right": 9,
-    "spin_left": 10,
-    "spin_right": 11,
-    "set_surge": 12,
-    "set_sway": 13,
-    "set_spin": 14,
-    "set_lift": 15,
-    "lift_up": 16,
-    "lift_down": 17,
-    "trim_reset": 18,
-    "session_quit": 19,
-}
-EVENT_ID_TO_NAME = {value: key for key, value in EVENT_NAME_TO_ID.items()}
-ANALOG_EVENT_CODES = {"set_surge", "set_sway", "set_spin"}
-
-
-@dataclass(slots=True)
-class ControlPacket:
-    seq_id: int
-    event_id: int
-    drive_value: float = 1.0
-    sent_at_ns: int = 0
-
-    @property
-    def event_name(self) -> str:
-        return EVENT_ID_TO_NAME.get(self.event_id, f"unknown_{self.event_id}")
-
-    def encode(self) -> bytes:
-        sent_at_ns = self.sent_at_ns or time.time_ns()
-        return CONTROL_PACKET_STRUCT.pack(
-            CONTROL_PACKET_VERSION,
-            self.event_id,
-            0,
-            int(self.seq_id),
-            float(self.drive_value),
-            int(sent_at_ns),
-        )
-
-    @classmethod
-    def decode(cls, payload: bytes) -> "ControlPacket":
-        if len(payload) != CONTROL_PACKET_STRUCT.size:
-            raise ValueError(
-                f"invalid control packet length {len(payload)}; "
-                f"want {CONTROL_PACKET_STRUCT.size}"
-            )
-        version, event_id, _reserved, seq_id, drive_value, sent_at_ns = (
-            CONTROL_PACKET_STRUCT.unpack(payload)
-        )
-        if version != CONTROL_PACKET_VERSION:
-            raise ValueError(f"unsupported control packet version {version}")
-        return cls(
-            seq_id=int(seq_id),
-            event_id=int(event_id),
-            drive_value=float(drive_value),
-            sent_at_ns=int(sent_at_ns),
-        )
-
-
-def make_control_packet(
-    seq_id: int,
-    event_name: str,
-    drive_value: float = 1.0,
-    sent_at_ns: int | None = None,
-) -> ControlPacket:
-    event_id = EVENT_NAME_TO_ID[event_name]
-    return ControlPacket(
-        seq_id=seq_id,
-        event_id=event_id,
-        drive_value=drive_value,
-        sent_at_ns=time.time_ns() if sent_at_ns is None else sent_at_ns,
-    )

python/omnisocket_b_side/__init__.py

@@ -1,10 +0,0 @@
-from pathlib import Path
-
-
-PACKAGE_ROOT = Path(__file__).resolve().parent
-PYTHON_ROOT = PACKAGE_ROOT.parent
-REPO_ROOT = PYTHON_ROOT.parent
-DEFAULT_SOCKET_PATH = "/tmp/omnisocket-b-side.sock"
-DEFAULT_CTRL_SOCKET_PATH = "/tmp/omnisocket-b-ctrl.sock"
-DEFAULT_CONFIG_PATH = REPO_ROOT / "config" / "b_side_omnidaemon.yaml"
-VERSION = "0.1.0"

python/omnisocket_b_side/__main__.py

@@ -1,5 +0,0 @@
-from .daemon import main
-
-
-if __name__ == "__main__":
-    main()

python/omnisocket_b_side/client.py

@@ -1,54 +0,0 @@
-"""Local AF_UNIX SOCK_SEQPACKET client for B-side control delivery."""
-
-from __future__ import annotations
-
-import os
-import socket
-
-from omnisocket_a_side.control_codec import CONTROL_PACKET_STRUCT
-
-from . import DEFAULT_CTRL_SOCKET_PATH
-
-
-class BSideControlClient:
-    def __init__(self, socket_path: str | None = None) -> None:
-        self.socket_path = socket_path or os.getenv(
-            "OMNIBDAEMON_CTRL_SOCKET",
-            DEFAULT_CTRL_SOCKET_PATH,
-        )
-        self._sock: socket.socket | None = None
-
-    def connect(self) -> None:
-        if not hasattr(socket, "AF_UNIX"):
-            raise OSError("AF_UNIX sockets are not available on this platform")
-        if not hasattr(socket, "SOCK_SEQPACKET"):
-            raise OSError("SOCK_SEQPACKET is not available on this platform")
-        sock = socket.socket(socket.AF_UNIX, socket.SOCK_SEQPACKET)
-        sock.connect(self.socket_path)
-        self._sock = sock
-
-    def recv_control_packet(self, timeout_ms: int = 100) -> bytes | None:
-        if self._sock is None:
-            raise RuntimeError("B-side control client is not connected")
-
-        self._sock.settimeout(max(0.001, timeout_ms / 1000.0))
-        try:
-            payload = self._sock.recv(CONTROL_PACKET_STRUCT.size)
-        except socket.timeout:
-            return None
-        except BlockingIOError:
-            return None
-
-        if payload == b"":
-            raise ConnectionResetError("daemon control socket closed")
-        if len(payload) != CONTROL_PACKET_STRUCT.size:
-            return None
-        return payload
-
-    def close(self) -> None:
-        if self._sock is None:
-            return
-        try:
-            self._sock.close()
-        finally:
-            self._sock = None

python/setup.py

@@ -35,13 +35,7 @@ COMMON_SOURCES = [
 setup(
     name="omnisocket",
     version="0.1.0",
-    packages=["omnisocket", "omnisocket_a_side", "omnisocket_b_side"],
-    entry_points={
-        "console_scripts": [
-            "omnisocket-a-side-daemon=omnisocket_a_side.daemon:main",
-            "omnisocket-b-side-daemon=omnisocket_b_side.daemon:main",
-        ]
-    },
+    packages=["omnisocket"],
     ext_modules=[
         Extension(
             "omnisocket._omnisocket",

python/tests/test_sessions.py

@@ -0,0 +1,318 @@
+from __future__ import annotations
+
+from contextlib import contextmanager
+from pathlib import Path
+import socket
+import subprocess
+import sys
+import threading
+import time
+
+import pytest
+
+
+pytestmark = pytest.mark.skipif(sys.platform != 'linux', reason='Linux-only OmniSocket extension')
+
+ROOT = Path(__file__).resolve().parents[2]
+PYTHON_ROOT = ROOT / 'python'
+if str(PYTHON_ROOT) not in sys.path:
+    sys.path.insert(0, str(PYTHON_ROOT))
+
+omnisocket = pytest.importorskip('omnisocket')
+
+CONTROL_DEFAULTS = omnisocket.CONTROL_DEFAULTS
+MSG_TYPE_BINARY = omnisocket.MSG_TYPE_BINARY
+Session = omnisocket.Session
+UdpSession = omnisocket.UdpSession
+
+
+def _reserve_port() -> int:
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
+        sock.bind(('127.0.0.1', 0))
+        return int(sock.getsockname()[1])
+
+
+@contextmanager
+def _run_server(binary_name: str, listen_addr: str):
+    binary = ROOT / 'bin' / binary_name
+    if not binary.exists():
+        pytest.skip(f'{binary} is not built')
+
+    process = subprocess.Popen(
+        [str(binary), '-listen', listen_addr],
+        cwd=str(ROOT),
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+    )
+    try:
+        time.sleep(0.2)
+        yield process
+    finally:
+        process.terminate()
+        try:
+            process.wait(timeout=2.0)
+        except subprocess.TimeoutExpired:
+            process.kill()
+            process.wait(timeout=2.0)
+
+
+@contextmanager
+def _run_relay(listen_addr: str, remote_addr: str):
+    binary = ROOT / 'bin' / 'kcpserver'
+    if not binary.exists():
+        pytest.skip(f'{binary} is not built')
+
+    process = subprocess.Popen(
+        [str(binary), '-mode', 'relay', '-listen', listen_addr, '-relay-remote', remote_addr],
+        cwd=str(ROOT),
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+    )
+    try:
+        time.sleep(0.2)
+        yield process
+    finally:
+        process.terminate()
+        try:
+            process.wait(timeout=2.0)
+        except subprocess.TimeoutExpired:
+            process.kill()
+            process.wait(timeout=2.0)
+
+
+def _connect_with_retry(session_cls, *, transport: str, server_addr: str, peer_id: str, relay_via: str = ''):
+    deadline = time.monotonic() + 3.0
+    last_error: Exception | None = None
+
+    while time.monotonic() < deadline:
+        session = session_cls()
+        try:
+            kwargs: dict[str, object] = {
+                'server_addr': server_addr,
+                'peer_id': peer_id,
+            }
+            if transport == 'kcp':
+                kwargs.update(CONTROL_DEFAULTS)
+                if relay_via:
+                    kwargs['relay_via'] = relay_via
+            else:
+                kwargs['enable_timestamping'] = False
+            session.connect(**kwargs)
+            return session
+        except OSError as exc:
+            last_error = exc
+            time.sleep(0.1)
+
+    raise AssertionError(f'failed to connect {peer_id} to {server_addr}: {last_error}')
+
+
+@pytest.mark.parametrize(
+    ('transport', 'binary_name', 'session_cls'),
+    [
+        ('udp', 'udpserver', UdpSession),
+        ('kcp', 'kcpserver', Session),
+    ],
+)
+def test_control_sessions_smoke(transport: str, binary_name: str, session_cls) -> None:
+    port = _reserve_port()
+    listen_addr = f'127.0.0.1:{port}'
+    sender_id = f'pytest-{transport}-sender'
+    receiver_id = f'pytest-{transport}-receiver'
+
+    with _run_server(binary_name, listen_addr):
+        sender = _connect_with_retry(session_cls, transport=transport, server_addr=listen_addr, peer_id=sender_id)
+        receiver = _connect_with_retry(session_cls, transport=transport, server_addr=listen_addr, peer_id=receiver_id)
+
+        try:
+            assert receiver.recv(timeout_ms=20) is None
+
+            payload = b'control-packet-1'
+            sender.send(to=receiver_id, data=payload)
+            from_peer, msg_type, recv_payload = receiver.recv(timeout_ms=1000)
+            assert from_peer == sender_id
+            assert msg_type == MSG_TYPE_BINARY
+            assert recv_payload == payload
+
+            payload2 = b'control-packet-2'
+            sender.send(to=receiver_id, data=payload2)
+            recv_buffer = bytearray(128)
+            meta = receiver.recv_into(buffer=recv_buffer, timeout_ms=1000)
+            assert meta is not None
+            assert meta['from'] == sender_id
+            assert meta['msg_type'] == MSG_TYPE_BINARY
+            assert meta['body_len'] == len(payload2)
+            assert bytes(recv_buffer[: meta['body_len']]) == payload2
+
+            sender_stats = sender.stats()
+            receiver_stats = receiver.stats()
+            assert sender_stats['connected'] == 1
+            assert receiver_stats['connected'] == 1
+            assert sender_stats['registered'] == 1
+            assert receiver_stats['registered'] == 1
+            assert sender_stats['send_calls'] >= 2
+            assert receiver_stats['recv_calls'] >= 2
+            if transport == 'kcp':
+                sender_kcp_stats = sender.kcp_stats()
+                receiver_kcp_stats = receiver.kcp_stats()
+                assert sender_kcp_stats['connected'] == 1
+                assert receiver_kcp_stats['connected'] == 1
+                assert 'srtt_ms' in sender_kcp_stats
+                assert 'snd_queue' in receiver_kcp_stats
+        finally:
+            sender.close()
+            receiver.close()
+
+
+def test_kcp_duplicate_peer_new_instance_wins() -> None:
+    port = _reserve_port()
+    listen_addr = f'127.0.0.1:{port}'
+    shared_peer_id = 'pytest-kcp-shared-peer'
+    sender_id = 'pytest-kcp-unique-sender'
+
+    with _run_server('kcpserver', listen_addr):
+        original = _connect_with_retry(Session, transport='kcp', server_addr=listen_addr, peer_id=shared_peer_id)
+        sender = _connect_with_retry(Session, transport='kcp', server_addr=listen_addr, peer_id=sender_id)
+        replacement = None
+
+        try:
+            replacement = _connect_with_retry(Session, transport='kcp', server_addr=listen_addr, peer_id=shared_peer_id)
+            replacement_stats = replacement.stats()
+            assert replacement_stats['connected'] == 1
+            assert replacement_stats['registered'] == 1
+
+            with pytest.raises(OSError):
+                original.recv(timeout_ms=1000)
+
+            payload = b'registered-replacement'
+            sender.send(to=shared_peer_id, data=payload)
+            from_peer, msg_type, recv_payload = replacement.recv(timeout_ms=1000)
+            assert from_peer == sender_id
+            assert msg_type == MSG_TYPE_BINARY
+            assert recv_payload == payload
+        finally:
+            original.close()
+            sender.close()
+            if replacement is not None:
+                replacement.close()
+
+
+def test_kcp_idle_video_peers_survive_without_receive_loop() -> None:
+    port = _reserve_port()
+    listen_addr = f'127.0.0.1:{port}'
+    sender_id = 'peer-b-video'
+    receiver_id = 'pytest-kcp-video-idle-receiver'
+
+    with _run_server('kcpserver', listen_addr):
+        sender = _connect_with_retry(Session, transport='kcp', server_addr=listen_addr, peer_id=sender_id)
+        receiver = _connect_with_retry(Session, transport='kcp', server_addr=listen_addr, peer_id=receiver_id)
+
+        try:
+            time.sleep(5.0)
+
+            payload = b'idle-video-session-still-alive'
+            sender.send(to=receiver_id, data=payload)
+            from_peer, msg_type, recv_payload = receiver.recv(timeout_ms=1000)
+            assert from_peer == sender_id
+            assert msg_type == MSG_TYPE_BINARY
+            assert recv_payload == payload
+        finally:
+            sender.close()
+            receiver.close()
+
+
+def test_kcp_peer_a_video_stale_receiver_is_evicted() -> None:
+    port = _reserve_port()
+    listen_addr = f'127.0.0.1:{port}'
+    receiver_id = 'peer-a-video'
+
+    with _run_server('kcpserver', listen_addr):
+        receiver = _connect_with_retry(Session, transport='kcp', server_addr=listen_addr, peer_id=receiver_id)
+
+        try:
+            time.sleep(5.0)
+            with pytest.raises(OSError):
+                receiver.recv(timeout_ms=1000)
+        finally:
+            receiver.close()
+
+
+def test_kcp_relay_routes_multiple_sessions_by_conv() -> None:
+    hub_port = _reserve_port()
+    relay_port = _reserve_port()
+    hub_addr = f'127.0.0.1:{hub_port}'
+    relay_addr = f'127.0.0.1:{relay_port}'
+
+    with _run_server('kcpserver', hub_addr):
+        with _run_relay(relay_addr, hub_addr):
+            sender = _connect_with_retry(Session, transport='kcp', server_addr=hub_addr, peer_id='pytest-relay-sender', relay_via=relay_addr)
+            receiver = _connect_with_retry(Session, transport='kcp', server_addr=hub_addr, peer_id='pytest-relay-receiver', relay_via=relay_addr)
+            chatter = _connect_with_retry(Session, transport='kcp', server_addr=hub_addr, peer_id='pytest-relay-chatter', relay_via=relay_addr)
+
+            try:
+                chatter.send(to='pytest-relay-sender', data=b'chatter-primes-last-client')
+                from_peer, msg_type, recv_payload = sender.recv(timeout_ms=1000)
+                assert from_peer == 'pytest-relay-chatter'
+                assert msg_type == MSG_TYPE_BINARY
+                assert recv_payload == b'chatter-primes-last-client'
+
+                sender.send(to='pytest-relay-receiver', data=b'relay-video-frame')
+                from_peer, msg_type, recv_payload = receiver.recv(timeout_ms=1000)
+                assert from_peer == 'pytest-relay-sender'
+                assert msg_type == MSG_TYPE_BINARY
+                assert recv_payload == b'relay-video-frame'
+            finally:
+                sender.close()
+                receiver.close()
+                chatter.close()
+
+
+def test_udp_session_close_interrupts_blocking_recv() -> None:
+    port = _reserve_port()
+    listen_addr = f'127.0.0.1:{port}'
+    receiver_id = 'pytest-udp-blocking-recv'
+
+    with _run_server('udpserver', listen_addr):
+        receiver = _connect_with_retry(
+            UdpSession,
+            transport='udp',
+            server_addr=listen_addr,
+            peer_id=receiver_id,
+        )
+
+        recv_error: list[BaseException] = []
+        close_error: list[BaseException] = []
+        recv_started = threading.Event()
+        recv_done = threading.Event()
+        close_done = threading.Event()
+
+        def recv_worker() -> None:
+            recv_started.set()
+            try:
+                receiver.recv()
+            except BaseException as exc:  # pragma: no cover - assertion is on thread completion
+                recv_error.append(exc)
+            finally:
+                recv_done.set()
+
+        def close_worker() -> None:
+            try:
+                receiver.close()
+            except BaseException as exc:  # pragma: no cover - assertion is on thread completion
+                close_error.append(exc)
+            finally:
+                close_done.set()
+
+        recv_thread = threading.Thread(target=recv_worker, daemon=True)
+        recv_thread.start()
+        assert recv_started.wait(timeout=1.0)
+        time.sleep(0.05)
+
+        close_thread = threading.Thread(target=close_worker, daemon=True)
+        close_thread.start()
+
+        assert close_done.wait(timeout=1.0), 'UdpSession.close() blocked while recv() was waiting'
+        assert recv_done.wait(timeout=1.0), 'UdpSession.recv() stayed blocked after close()'
+        assert not close_thread.is_alive()
+        assert not recv_thread.is_alive()
+        assert not close_error
+        assert not recv_error or isinstance(recv_error[0], OSError)

ros-control-c/Makefile

@@ -0,0 +1,34 @@
+CC      = gcc
+CFLAGS  = -std=c11 -Wall -Wextra -O2 -pthread -D_GNU_SOURCE -I../include -I../third_party/cjson -I../third_party/kcp -I./common
+LDFLAGS = -pthread -lm
+
+OMNI_SRCS = \
+	../src/omni_common.c \
+	../src/protocol.c \
+	../src/latencylog.c \
+	../src/kcp_packet_debug.c \
+	../src/kcp_session_stats.c \
+	../src/linux_timestamping.c \
+	../src/transport_kcp.c \
+	../src/peer_kcp_client.c \
+	../third_party/cjson/cJSON.c \
+	../third_party/kcp/ikcp.c
+
+BUILDDIR = build
+
+TARGETS = $(BUILDDIR)/keyboard_controller $(BUILDDIR)/gamepad_controller
+
+.PHONY: all clean
+
+all: $(TARGETS)
+
+$(BUILDDIR)/keyboard_controller: remote/keyboard_controller.c common/protocol.h common/teleop_transport.h common/teleop_transport.c $(OMNI_SRCS)
+	@mkdir -p $(BUILDDIR)
+	$(CC) $(CFLAGS) -o $@ remote/keyboard_controller.c common/teleop_transport.c $(OMNI_SRCS) $(LDFLAGS)
+
+$(BUILDDIR)/gamepad_controller: remote/gamepad_controller.c common/protocol.h common/teleop_transport.h common/teleop_transport.c $(OMNI_SRCS)
+	@mkdir -p $(BUILDDIR)
+	$(CC) $(CFLAGS) -o $@ remote/gamepad_controller.c common/teleop_transport.c $(OMNI_SRCS) $(LDFLAGS)
+
+clean:
+	rm -rf $(BUILDDIR)

ros-control-c/README.md

@@ -0,0 +1,76 @@
+# ros-control-c
+
+`ros-control-c` keeps the original 24-byte `twist_cmd_t` control payload and now supports two runtime transports:
+
+- `udp` (default): unchanged from the original implementation
+- `kcp`: sent through OmniSocket using `MSG_TYPE_BINARY`
+
+Note:
+
+- This README documents the `ros-control-c` path only.
+- `ros-control-py` now uses OmniSocket for both `transport:=udp` and `transport:=kcp`; its `udp` mode is no longer raw socket UDP.
+
+## Build
+
+On Linux:
+
+```bash
+make -C ros-control-c
+```
+
+If the robot-side Python bridge will use KCP, build and install the OmniSocket Python extension from the repo root first:
+
+```bash
+make python-ext
+make python-install
+```
+
+## UDP Mode
+
+Sender:
+
+```bash
+./ros-control-c/build/keyboard_controller -i 192.168.1.100 -p 9870
+./ros-control-c/build/gamepad_controller -i 192.168.1.100 -p 9870
+```
+
+Robot bridge:
+
+```bash
+python3 ros-control-c/robot/udp_ros_bridge.py
+```
+
+## KCP Mode
+
+Start the existing OmniSocket KCP hub from the repo root:
+
+```bash
+./bin/kcpserver -listen :9002 -telemetry-peer peer-a-telemetry
+```
+
+Sender:
+
+```bash
+./ros-control-c/build/keyboard_controller -t kcp -s 192.168.1.50:9002 -I ros-keyboard-ctrl -T ros-bridge-ctrl
+./ros-control-c/build/gamepad_controller -t kcp -s 192.168.1.50:9002 -I ros-gamepad-ctrl -T ros-bridge-ctrl
+```
+
+If a relay is needed, add `-r <relay_addr>` to the controller command.
+
+Robot bridge:
+
+```bash
+python3 ros-control-c/robot/udp_ros_bridge.py --ros-args \
+  -p transport:=kcp \
+  -p kcp_server:=192.168.1.50:9002 \
+  -p peer_id:=ros-bridge-ctrl
+```
+
+Optional sender filtering:
+
+```bash
+python3 ros-control-c/robot/udp_ros_bridge.py --ros-args \
+  -p transport:=kcp \
+  -p peer_id:=ros-bridge-ctrl \
+  -p expected_sender:=ros-keyboard-ctrl
+```

ros-control-c/Robot Remote Control via UDP - Implementation Plan.md

@@ -0,0 +1,221 @@
+Robot Remote Control via UDP — Implementation Plan
+
+ Context
+
+ The robot subscribes to /hric/robot/cmd_vel with geometry_msgs/msg/TwistStamped (frame_id: pelvis). Standard ROS2 teleop tools (teleop_twist_keyboard, teleop_twist_joy) publish   
+ plain Twist, not TwistStamped, so they won't work directly. We build custom keyboard and gamepad controllers in C (zero external dependencies, Linux-only) communicating over UDP  
+ to a robot-side ROS2 bridge.
+
+ How to Make the Robot Move
+
+ Publish TwistStamped to /hric/robot/cmd_vel continuously (~20 Hz):
+
+ ┌─────────────────────┬─────────────────┐
+ │        Field        │     Effect      │
+ ├─────────────────────┼─────────────────┤
+ │ twist.linear.x > 0  │ Walk forward    │
+ ├─────────────────────┼─────────────────┤
+ │ twist.linear.x < 0  │ Walk backward   │
+ ├─────────────────────┼─────────────────┤
+ │ twist.linear.y > 0  │ Strafe left     │
+ ├─────────────────────┼─────────────────┤
+ │ twist.linear.y < 0  │ Strafe right    │
+ ├─────────────────────┼─────────────────┤
+ │ twist.angular.z > 0 │ Turn left (CCW) │
+ ├─────────────────────┼─────────────────┤
+ │ twist.angular.z < 0 │ Turn right (CW) │
+ ├─────────────────────┼─────────────────┤
+ │ All zeros           │ Stop            │
+ └─────────────────────┴─────────────────┘
+
+ Header must have frame_id = "pelvis" and current ROS timestamp.
+
+ ---
+ Architecture
+
+ [PC: Keyboard/Gamepad (C)] --UDP binary struct--> [Robot: Bridge (Python/rclpy)] --> /hric/robot/cmd_vel
+
+ ---
+ Project Structure
+
+ ros-control/
+ ├── topic_example.yaml              # (existing)
+ ├── Makefile                         # Build both C programs
+ ├── common/
+ │   └── protocol.h                   # Shared UDP protocol (binary struct)
+ ├── remote/
+ │   ├── keyboard_controller.c        # Keyboard teleop (C, termios)
+ │   └── gamepad_controller.c         # Gamepad teleop (C, Linux joystick API)
+ └── robot/
+     └── udp_ros_bridge.py            # UDP → ROS2 TwistStamped (Python/rclpy)
+
+ ---
+ UDP Protocol (common/protocol.h)
+
+ Binary packed struct — 24 bytes, no parsing overhead:
+
+ #pragma pack(push, 1)
+ typedef struct {
+     float lx, ly, lz;   // linear velocity (m/s)
+     float ax, ay, az;    // angular velocity (rad/s)
+ } twist_cmd_t;
+ #pragma pack(pop)
+
+ #define DEFAULT_PORT 9870
+ #define DEFAULT_IP   "127.0.0.1"
+
+ On Python side, decode with struct.unpack('<6f', data).
+
+ ---
+ Program 1: Keyboard Controller (remote/keyboard_controller.c)
+
+ Dependencies: None (POSIX + termios only)
+
+ Technical approach:
+ - termios.h: Set terminal to raw mode (~ICANON, ~ECHO, VMIN=0, VTIME=1)
+ - select() with 50ms timeout for non-blocking key detection
+ - Arrow keys: detect ESC sequence (\x1B[A/B/C/D)
+ - UDP send via standard socket() / sendto()
+
+ Key mapping:
+
+ ┌────────┬───────────────────────────────────┐
+ │  Key   │              Action               │
+ ├────────┼───────────────────────────────────┤
+ │ W / ↑  │ Forward (+linear.x)               │
+ ├────────┼───────────────────────────────────┤
+ │ S / ↓  │ Backward (-linear.x)              │
+ ├────────┼───────────────────────────────────┤
+ │ A / ←  │ Turn left (+angular.z)            │
+ ├────────┼───────────────────────────────────┤
+ │ D / →  │ Turn right (-angular.z)           │
+ ├────────┼───────────────────────────────────┤
+ │ Q      │ Strafe left (+linear.y)           │
+ ├────────┼───────────────────────────────────┤
+ │ E      │ Strafe right (-linear.y)          │
+ ├────────┼───────────────────────────────────┤
+ │ Space  │ Emergency stop (all zeros)        │
+ ├────────┼───────────────────────────────────┤
+ │ [ / ]  │ Decrease / increase linear speed  │
+ ├────────┼───────────────────────────────────┤
+ │ - / =  │ Decrease / increase angular speed │
+ ├────────┼───────────────────────────────────┤
+ │ Ctrl+C │ Quit (restore terminal)           │
+ └────────┴───────────────────────────────────┘
+
+ Behavior:
+ - 20 Hz send loop in main thread
+ - On key press: set velocity to ±max_speed
+ - On no key (select timeout): gradually decay velocity to zero OR send zero immediately (configurable)
+ - Print current velocity and speed settings to terminal (refresh in-place with \r)
+ - signal(SIGINT) handler to restore terminal settings before exit
+ - CLI args: -i <ip>, -p <port>, -l <max_linear>, -a <max_angular>
+
+ ---
+ Program 2: Gamepad Controller (remote/gamepad_controller.c)
+
+ Dependencies: None (Linux joystick API only: linux/joystick.h)
+
+ Technical approach:
+ - Open /dev/input/js0 (configurable) with O_RDONLY | O_NONBLOCK
+ - Read struct js_event (8 bytes: __u32 time, __s16 value, __u8 type, __u8 number)
+ - Event types: JS_EVENT_AXIS (0x02), JS_EVENT_BUTTON (0x01)
+ - select() for multiplexing joystick read + periodic UDP send
+
+ Xbox controller axis mapping (xpad driver):
+
+ ┌────────┬───────────────┬───────────────────────────────────┐
+ │ Axis # │   Physical    │              Mapping              │
+ ├────────┼───────────────┼───────────────────────────────────┤
+ │ 0      │ Left stick X  │ linear.y (strafe)                 │
+ ├────────┼───────────────┼───────────────────────────────────┤
+ │ 1      │ Left stick Y  │ linear.x (forward/back, inverted) │
+ ├────────┼───────────────┼───────────────────────────────────┤
+ │ 3      │ Right stick X │ angular.z (turn)                  │
+ └────────┴───────────────┴───────────────────────────────────┘
+
+ Button mapping:
+
+ ┌──────────┬──────────┬────────────────┐
+ │ Button # │ Physical │     Action     │
+ ├──────────┼──────────┼────────────────┤
+ │ 0        │ A        │ Emergency stop │
+ ├──────────┼──────────┼────────────────┤
+ │ 1        │ B        │ Quit           │
+ └──────────┴──────────┴────────────────┘
+
+ Behavior:
+ - Axis values: raw range [-32767, 32767] → normalized to [-1.0, 1.0] → scaled by max_speed
+ - Deadzone: |normalized| < 0.1 → treat as 0 (configurable)
+ - 20 Hz UDP send loop
+ - Print gamepad name (via JSIOCGNAME ioctl), axes, and current velocities
+ - Auto-detect controller disconnect / reconnect
+ - CLI args: -i <ip>, -p <port>, -d <device>, -l <max_linear>, -a <max_angular>, -z <deadzone>
+
+ ---
+ Program 3: UDP-to-ROS2 Bridge (robot/udp_ros_bridge.py)
+
+ Dependencies: rclpy, geometry_msgs (standard ROS2)
+
+ Behavior:
+ - ROS2 node: udp_teleop_bridge
+ - Bind UDP on 0.0.0.0:9870
+ - Receive 24-byte struct → struct.unpack('<6f', data) → build TwistStamped
+ - Set header.stamp = current ROS time, header.frame_id = 'pelvis'
+ - Publish to /hric/robot/cmd_vel at received rate
+ - Watchdog: if no packet for 0.5s, publish zero velocity (safety stop)
+ - UDP recv in separate threading.Thread, ROS2 spin() in main thread
+ - ROS2 parameters: udp_port (int), topic (string), frame_id (string), timeout (float)
+
+ ---
+ Build System (Makefile)
+
+ CC = gcc
+ CFLAGS = -Wall -Wextra -O2 -I./common
+ LDFLAGS = -lm
+
+ all: build/keyboard_controller build/gamepad_controller
+
+ build/keyboard_controller: remote/keyboard_controller.c common/protocol.h
+        @mkdir -p build
+        $(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+
+ build/gamepad_controller: remote/gamepad_controller.c common/protocol.h
+        @mkdir -p build
+        $(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+
+ clean:
+        rm -rf build
+
+ ---
+ Files to Create (5 total)
+
+ ┌─────┬──────────────────────────────┬────────┬───────────────────────────────────┐
+ │  #  │             File             │  Lang  │              Purpose              │
+ ├─────┼──────────────────────────────┼────────┼───────────────────────────────────┤
+ │ 1   │ common/protocol.h            │ C      │ UDP protocol: struct + constants  │
+ ├─────┼──────────────────────────────┼────────┼───────────────────────────────────┤
+ │ 2   │ remote/keyboard_controller.c │ C      │ Keyboard → UDP (termios, select)  │
+ ├─────┼──────────────────────────────┼────────┼───────────────────────────────────┤
+ │ 3   │ remote/gamepad_controller.c  │ C      │ Gamepad → UDP (linux/joystick.h)  │
+ ├─────┼──────────────────────────────┼────────┼───────────────────────────────────┤
+ │ 4   │ robot/udp_ros_bridge.py      │ Python │ UDP → ROS2 TwistStamped publisher │
+ ├─────┼──────────────────────────────┼────────┼───────────────────────────────────┤
+ │ 5   │ Makefile                     │ Make   │ Build system                      │
+ └─────┴──────────────────────────────┴────────┴───────────────────────────────────┘
+
+ ---
+ Verification
+
+ 1. Build: make — should compile without warnings
+ 2. Keyboard test: Run build/keyboard_controller -i 127.0.0.1, use a simple Python UDP listener to verify packets:
+ import socket, struct
+ s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+ s.bind(('0.0.0.0', 9870))
+ while True:
+     data, _ = s.recvfrom(24)
+     print(struct.unpack('<6f', data))
+ 3. Gamepad test: Connect Xbox controller, run build/gamepad_controller, verify stick input produces correct UDP packets
+ 4. Bridge test: Run udp_ros_bridge.py, then ros2 topic echo /hric/robot/cmd_vel to verify TwistStamped messages
+ 5. Safety: Stop controller, confirm bridge sends zero velocity after 0.5s timeout
+ 6. End-to-end: Controller → Bridge → robot moves

ros-control-c/common/protocol.h

@@ -0,0 +1,26 @@
+#ifndef PROTOCOL_H
+#define PROTOCOL_H
+
+#include <stdint.h>
+
+#define DEFAULT_PORT    9870
+#define DEFAULT_IP      "127.0.0.1"
+#define SEND_RATE_HZ    20
+#define SEND_INTERVAL_US (1000000 / SEND_RATE_HZ)
+
+#pragma pack(push, 1)
+typedef struct {
+    float lx, ly, lz;  /* linear  velocity (m/s)   */
+    float ax, ay, az;   /* angular velocity (rad/s) */
+} twist_cmd_t;
+#pragma pack(pop)
+
+#define TWIST_CMD_SIZE sizeof(twist_cmd_t)  /* 24 bytes */
+
+static inline void twist_cmd_zero(twist_cmd_t *cmd)
+{
+    cmd->lx = cmd->ly = cmd->lz = 0.0f;
+    cmd->ax = cmd->ay = cmd->az = 0.0f;
+}
+
+#endif /* PROTOCOL_H */

ros-control-c/common/teleop_transport.c

@@ -0,0 +1,300 @@
+#include "teleop_transport.h"
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+static void teleop_transport_clear(teleop_transport_t *transport)
+{
+    if (transport == NULL) {
+        return;
+    }
+    memset(transport, 0, sizeof(*transport));
+    transport->mode = TELEOP_TRANSPORT_MODE_UDP;
+    transport->udp_fd = -1;
+}
+
+int teleop_transport_parse_mode(const char *raw, teleop_transport_mode_t *out_mode)
+{
+    if (raw == NULL || out_mode == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+    if (strcmp(raw, "udp") == 0) {
+        *out_mode = TELEOP_TRANSPORT_MODE_UDP;
+        return 0;
+    }
+    if (strcmp(raw, "kcp") == 0) {
+        *out_mode = TELEOP_TRANSPORT_MODE_KCP;
+        return 0;
+    }
+    errno = EINVAL;
+    return -1;
+}
+
+const char *teleop_transport_mode_name(teleop_transport_mode_t mode)
+{
+    return mode == TELEOP_TRANSPORT_MODE_KCP ? "kcp" : "udp";
+}
+
+static void teleop_transport_log_incoming(const message_t *msg)
+{
+    if (msg == NULL) {
+        return;
+    }
+
+    switch (msg->type) {
+    case MSG_TYPE_ERROR:
+        fprintf(stderr,
+                "teleop transport: server error from %s to %s: %.*s\n",
+                msg->from,
+                msg->to,
+                (int)msg->body_len,
+                msg->body == NULL ? "" : (const char *)msg->body);
+        break;
+    case MSG_TYPE_TEXT:
+        fprintf(stderr,
+                "teleop transport: dropped unexpected text from %s to %s: %.*s\n",
+                msg->from,
+                msg->to,
+                (int)msg->body_len,
+                msg->body == NULL ? "" : (const char *)msg->body);
+        break;
+    case MSG_TYPE_BINARY:
+        fprintf(stderr,
+                "teleop transport: dropped unexpected binary payload from %s to %s (%lu bytes)\n",
+                msg->from,
+                msg->to,
+                (unsigned long)msg->body_len);
+        break;
+    case MSG_TYPE_FILE:
+        fprintf(stderr,
+                "teleop transport: dropped unexpected file from %s to %s: %s (%lu bytes)\n",
+                msg->from,
+                msg->to,
+                msg->file_name,
+                (unsigned long)msg->body_len);
+        break;
+    case MSG_TYPE_REGISTER:
+        fprintf(stderr,
+                "teleop transport: dropped unexpected register message from %s to %s\n",
+                msg->from,
+                msg->to);
+        break;
+    default:
+        fprintf(stderr,
+                "teleop transport: dropped unexpected message type %s from %s\n",
+                protocol_message_type_name(msg->type),
+                msg->from);
+        break;
+    }
+}
+
+static void *teleop_transport_kcp_recv_thread_main(void *arg)
+{
+    teleop_transport_t *transport = (teleop_transport_t *)arg;
+
+    for (;;) {
+        message_t msg;
+        int rc;
+
+        if (transport->stop_requested) {
+            return NULL;
+        }
+
+        protocol_message_init(&msg);
+        rc = kcp_client_receive_timed(transport->kcp_client, &msg, 100);
+        if (rc == 1) {
+            protocol_message_clear(&msg);
+            continue;
+        }
+        if (rc != 0) {
+            protocol_message_clear(&msg);
+            if (!transport->stop_requested) {
+                int saved_errno = errno;
+                fprintf(stderr,
+                        "teleop transport: KCP receive loop stopped: %s (errno=%d)\n",
+                        saved_errno != 0 ? strerror(saved_errno) : "unknown error",
+                        saved_errno);
+            }
+            return NULL;
+        }
+
+        teleop_transport_log_incoming(&msg);
+        protocol_message_clear(&msg);
+    }
+}
+
+static int teleop_transport_open_udp(teleop_transport_t *transport, const teleop_transport_config_t *config)
+{
+    int sockfd;
+
+    if (transport == NULL || config == NULL || config->udp_ip == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+    if (sockfd < 0) {
+        perror("socket");
+        return -1;
+    }
+
+    memset(&transport->udp_dest, 0, sizeof(transport->udp_dest));
+    transport->udp_dest.sin_family = AF_INET;
+    transport->udp_dest.sin_port = htons(config->udp_port);
+    if (inet_pton(AF_INET, config->udp_ip, &transport->udp_dest.sin_addr) <= 0) {
+        fprintf(stderr, "Invalid IP: %s\n", config->udp_ip);
+        close(sockfd);
+        errno = EINVAL;
+        return -1;
+    }
+
+    transport->udp_fd = sockfd;
+    return 0;
+}
+
+static int teleop_transport_open_kcp(teleop_transport_t *transport, const teleop_transport_config_t *config)
+{
+    kcp_conn_options_t options;
+    const char *relay_via;
+
+    if (transport == NULL || config == NULL ||
+        config->server_addr == NULL || config->peer_id == NULL || config->target_peer == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    kcp_conn_options_set_control_defaults(&options);
+    relay_via = (config->relay_via != NULL && config->relay_via[0] != '\0') ? config->relay_via : NULL;
+    transport->kcp_client = kcp_client_dial_with_options(
+        config->server_addr,
+        relay_via,
+        config->peer_id,
+        "",
+        "",
+        &options,
+        NULL,
+        NULL,
+        NULL,
+        KCP_DEFAULT_STATS_INTERVAL_MS
+    );
+    if (transport->kcp_client == NULL) {
+        int saved_errno = errno;
+        fprintf(stderr,
+                "teleop transport: failed to open KCP session as %s via %s%s%s: %s (errno=%d)\n",
+                config->peer_id,
+                config->server_addr,
+                relay_via != NULL ? ", relay=" : "",
+                relay_via != NULL ? relay_via : "",
+                saved_errno != 0 ? strerror(saved_errno) : "unknown error",
+                saved_errno);
+        errno = saved_errno;
+        return -1;
+    }
+
+    {
+        int thread_rc = pthread_create(&transport->recv_thread, NULL, teleop_transport_kcp_recv_thread_main, transport);
+        if (thread_rc != 0) {
+            fprintf(stderr,
+                    "teleop transport: failed to start KCP receive thread: %s (errno=%d)\n",
+                    strerror(thread_rc),
+                    thread_rc);
+            kcp_client_close(transport->kcp_client);
+            kcp_client_free(transport->kcp_client);
+            transport->kcp_client = NULL;
+            errno = thread_rc;
+            return -1;
+        }
+    }
+    transport->recv_thread_started = 1;
+    return 0;
+}
+
+int teleop_transport_open(teleop_transport_t *transport, const teleop_transport_config_t *config)
+{
+    if (transport == NULL || config == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    teleop_transport_clear(transport);
+    transport->mode = config->mode;
+    snprintf(transport->server_addr, sizeof(transport->server_addr), "%s",
+             config->server_addr == NULL ? "" : config->server_addr);
+    snprintf(transport->relay_via, sizeof(transport->relay_via), "%s",
+             config->relay_via == NULL ? "" : config->relay_via);
+    snprintf(transport->peer_id, sizeof(transport->peer_id), "%s",
+             config->peer_id == NULL ? "" : config->peer_id);
+    snprintf(transport->target_peer, sizeof(transport->target_peer), "%s",
+             config->target_peer == NULL ? "" : config->target_peer);
+
+    if (config->mode == TELEOP_TRANSPORT_MODE_KCP) {
+        return teleop_transport_open_kcp(transport, config);
+    }
+    return teleop_transport_open_udp(transport, config);
+}
+
+int teleop_transport_send_twist(teleop_transport_t *transport, const twist_cmd_t *cmd)
+{
+    if (transport == NULL || cmd == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    if (transport->mode == TELEOP_TRANSPORT_MODE_KCP) {
+        if (kcp_client_send_binary(transport->kcp_client, transport->target_peer, cmd, TWIST_CMD_SIZE) != 0) {
+            int saved_errno = errno;
+            fprintf(stderr,
+                    "teleop transport: failed to send KCP payload to %s: %s (errno=%d)\n",
+                    transport->target_peer,
+                    saved_errno != 0 ? strerror(saved_errno) : "unknown error",
+                    saved_errno);
+            errno = saved_errno;
+            return -1;
+        }
+        return 0;
+    }
+
+    {
+        ssize_t sent = sendto(transport->udp_fd, cmd, TWIST_CMD_SIZE, 0,
+                              (const struct sockaddr *)&transport->udp_dest, sizeof(transport->udp_dest));
+        if (sent < 0) {
+            perror("sendto");
+            return -1;
+        }
+        if ((size_t)sent != TWIST_CMD_SIZE) {
+            fprintf(stderr, "sendto: short send (%zd/%zu)\n", sent, (size_t)TWIST_CMD_SIZE);
+            errno = EIO;
+            return -1;
+        }
+    }
+    return 0;
+}
+
+void teleop_transport_close(teleop_transport_t *transport)
+{
+    if (transport == NULL) {
+        return;
+    }
+
+    transport->stop_requested = 1;
+    if (transport->kcp_client != NULL) {
+        kcp_client_close(transport->kcp_client);
+    }
+    if (transport->recv_thread_started) {
+        pthread_join(transport->recv_thread, NULL);
+        transport->recv_thread_started = 0;
+    }
+    if (transport->kcp_client != NULL) {
+        kcp_client_free(transport->kcp_client);
+        transport->kcp_client = NULL;
+    }
+    if (transport->udp_fd >= 0) {
+        close(transport->udp_fd);
+        transport->udp_fd = -1;
+    }
+}

ros-control-c/common/teleop_transport.h

@@ -0,0 +1,59 @@
+#ifndef TELEOP_TRANSPORT_H
+#define TELEOP_TRANSPORT_H
+
+#include <netinet/in.h>
+#include <pthread.h>
+
+#include "protocol.h"
+#include "peer_kcp_client.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define DEFAULT_KCP_SERVER_ADDR "127.0.0.1:9002"
+#define DEFAULT_KCP_KEYBOARD_PEER_ID "ros-keyboard-ctrl"
+#define DEFAULT_KCP_GAMEPAD_PEER_ID "ros-gamepad-ctrl"
+#define DEFAULT_KCP_TARGET_PEER_ID "ros-bridge-ctrl"
+
+typedef enum teleop_transport_mode {
+    TELEOP_TRANSPORT_MODE_UDP = 0,
+    TELEOP_TRANSPORT_MODE_KCP = 1
+} teleop_transport_mode_t;
+
+typedef struct teleop_transport_config {
+    teleop_transport_mode_t mode;
+    const char *udp_ip;
+    int udp_port;
+    const char *server_addr;
+    const char *relay_via;
+    const char *peer_id;
+    const char *target_peer;
+} teleop_transport_config_t;
+
+typedef struct teleop_transport {
+    teleop_transport_mode_t mode;
+    int udp_fd;
+    struct sockaddr_in udp_dest;
+    kcp_client_t *kcp_client;
+    pthread_t recv_thread;
+    int recv_thread_started;
+    volatile int stop_requested;
+    char server_addr[OMNI_MAX_ADDR_TEXT];
+    char relay_via[OMNI_MAX_ADDR_TEXT];
+    char peer_id[OMNI_MAX_PEER_ID];
+    char target_peer[OMNI_MAX_PEER_ID];
+} teleop_transport_t;
+
+int teleop_transport_parse_mode(const char *raw, teleop_transport_mode_t *out_mode);
+const char *teleop_transport_mode_name(teleop_transport_mode_t mode);
+
+int teleop_transport_open(teleop_transport_t *transport, const teleop_transport_config_t *config);
+int teleop_transport_send_twist(teleop_transport_t *transport, const twist_cmd_t *cmd);
+void teleop_transport_close(teleop_transport_t *transport);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* TELEOP_TRANSPORT_H */

ros-control-c/remote/gamepad_controller.c

@@ -0,0 +1,293 @@
+/*
+ * gamepad_controller.c — Gamepad/joystick teleop over UDP or KCP
+ *
+ * Uses the Linux joystick API (/dev/input/js*).
+ * Zero external dependencies.
+ *
+ * Xbox controller mapping (xpad driver):
+ *   Left stick Y  (axis 1) → linear.x  (forward/back, inverted)
+ *   Left stick X  (axis 0) → linear.y  (strafe)
+ *   Right stick X (axis 3) → angular.z (turn)
+ *   Button A (0) → emergency stop
+ *   Button B (1) → quit
+ *
+ * Build:  gcc -Wall -O2 -I../common -o gamepad_controller gamepad_controller.c -lm
+ * Usage:  ./gamepad_controller [-i IP] [-p PORT] [-d /dev/input/js0]
+ *                              [-l MAX_LIN] [-a MAX_ANG] [-z DEADZONE]
+ *                              [-t udp|kcp] [-s SERVER] [-r RELAY]
+ *                              [-I PEER_ID] [-T TARGET_PEER]
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <math.h>
+#include <errno.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <getopt.h>
+#include <linux/joystick.h>
+
+#include "../common/protocol.h"
+#include "../common/teleop_transport.h"
+
+/* ── config ─────────────────────────────────────────────────────────── */
+#define MAX_AXES    16
+#define MAX_BUTTONS 16
+#define JS_AXIS_MAX 32767.0f
+
+/* Xbox mapping indices */
+#define AXIS_LX  0      /* left stick X  → strafe  */
+#define AXIS_LY  1      /* left stick Y  → fwd/back (inverted) */
+#define AXIS_RX  3      /* right stick X → turn     */
+
+#define BTN_STOP 0      /* A → emergency stop */
+#define BTN_QUIT 1      /* B → quit */
+
+static volatile sig_atomic_t g_running = 1;
+
+static void sigint_handler(int sig) { (void)sig; g_running = 0; }
+
+static int parse_port(const char *text, int *port_out)
+{
+    char *end = NULL;
+    long value = strtol(text, &end, 10);
+
+    if (end == text || *end != '\0' || value < 1 || value > 65535)
+        return -1;
+
+    *port_out = (int)value;
+    return 0;
+}
+
+/* ── apply deadzone ─────────────────────────────────────────────────── */
+static float apply_deadzone(float v, float dz)
+{
+    if (fabsf(v) < dz) return 0.0f;
+    /* rescale so the output starts from 0 just outside the deadzone */
+    float sign = (v > 0) ? 1.0f : -1.0f;
+    return sign * (fabsf(v) - dz) / (1.0f - dz);
+}
+
+/* ── usage ──────────────────────────────────────────────────────────── */
+static void usage(const char *prog)
+{
+    fprintf(stderr,
+        "Usage: %s [options]\n"
+        "  -i IP       target IP       (default %s)\n"
+        "  -p PORT     target port     (default %d)\n"
+        "  -d DEVICE   joystick device (default /dev/input/js0)\n"
+        "  -l SPEED    max linear  m/s (default 0.5)\n"
+        "  -a SPEED    max angular rad/s (default 0.5)\n"
+        "  -z DZ       deadzone 0<=DZ<1 (default 0.1)\n"
+        "  -t MODE     transport mode udp|kcp (default udp)\n"
+        "  -s ADDR     KCP server addr        (default %s)\n"
+        "  -r ADDR     KCP relay addr         (default none)\n"
+        "  -I ID       local KCP peer id      (default %s)\n"
+        "  -T ID       target KCP peer id     (default %s)\n"
+        "  -h          show help\n",
+        prog, DEFAULT_IP, DEFAULT_PORT,
+        DEFAULT_KCP_SERVER_ADDR,
+        DEFAULT_KCP_GAMEPAD_PEER_ID,
+        DEFAULT_KCP_TARGET_PEER_ID);
+}
+
+/* ──────────────────────────────────────────────────────────────────── */
+int main(int argc, char *argv[])
+{
+    char  ip[64]     = DEFAULT_IP;
+    int   port       = DEFAULT_PORT;
+    char  device[128] = "/dev/input/js0";
+    char  kcp_server[OMNI_MAX_ADDR_TEXT] = DEFAULT_KCP_SERVER_ADDR;
+    char  kcp_relay[OMNI_MAX_ADDR_TEXT] = "";
+    char  peer_id[OMNI_MAX_PEER_ID] = DEFAULT_KCP_GAMEPAD_PEER_ID;
+    char  target_peer[OMNI_MAX_PEER_ID] = DEFAULT_KCP_TARGET_PEER_ID;
+    float max_lin    = 0.5f;
+    float max_ang    = 0.5f;
+    float deadzone   = 0.1f;
+    teleop_transport_mode_t transport_mode = TELEOP_TRANSPORT_MODE_UDP;
+    teleop_transport_t transport;
+    teleop_transport_config_t transport_config;
+
+    int opt;
+    while ((opt = getopt(argc, argv, "i:p:d:l:a:z:t:s:r:I:T:h")) != -1) {
+        switch (opt) {
+        case 'i': strncpy(ip, optarg, sizeof(ip)-1); ip[sizeof(ip)-1] = '\0'; break;
+        case 'p':
+            if (parse_port(optarg, &port) != 0) {
+                fprintf(stderr, "Invalid port: %s (expected 1-65535)\n", optarg);
+                return 1;
+            }
+            break;
+        case 'd': strncpy(device, optarg, sizeof(device)-1); device[sizeof(device)-1] = '\0'; break;
+        case 'l': max_lin  = strtof(optarg, NULL);        break;
+        case 'a': max_ang  = strtof(optarg, NULL);        break;
+        case 'z': deadzone = strtof(optarg, NULL);        break;
+        case 't':
+            if (teleop_transport_parse_mode(optarg, &transport_mode) != 0) {
+                fprintf(stderr, "Invalid transport mode: %s (expected udp or kcp)\n", optarg);
+                return 1;
+            }
+            break;
+        case 's': strncpy(kcp_server, optarg, sizeof(kcp_server)-1); kcp_server[sizeof(kcp_server)-1] = '\0'; break;
+        case 'r': strncpy(kcp_relay, optarg, sizeof(kcp_relay)-1); kcp_relay[sizeof(kcp_relay)-1] = '\0'; break;
+        case 'I': strncpy(peer_id, optarg, sizeof(peer_id)-1); peer_id[sizeof(peer_id)-1] = '\0'; break;
+        case 'T': strncpy(target_peer, optarg, sizeof(target_peer)-1); target_peer[sizeof(target_peer)-1] = '\0'; break;
+        default:  usage(argv[0]); return (opt == 'h') ? 0 : 1;
+        }
+    }
+
+    if (deadzone < 0.0f || deadzone >= 1.0f) {
+        fprintf(stderr, "Invalid deadzone %.3f: expected 0 <= dz < 1\n", deadzone);
+        return 1;
+    }
+
+    signal(SIGINT, sigint_handler);
+
+    /* ── open joystick ───────────────────────────────────────────── */
+    int jsfd = open(device, O_RDONLY | O_NONBLOCK);
+    if (jsfd < 0) {
+        fprintf(stderr, "Cannot open %s: %s\n"
+                "  Hint: connect Xbox controller, check 'ls /dev/input/js*'\n",
+                device, strerror(errno));
+        return 1;
+    }
+
+    char js_name[128] = "Unknown";
+    ioctl(jsfd, JSIOCGNAME(sizeof(js_name)), js_name);
+
+    int num_axes = 0, num_buttons = 0;
+    ioctl(jsfd, JSIOCGAXES, &num_axes);
+    ioctl(jsfd, JSIOCGBUTTONS, &num_buttons);
+
+    printf("========================================\n");
+    printf("  Gamepad Teleop Controller\n");
+    printf("========================================\n");
+    printf("  Device : %s\n", device);
+    printf("  Name   : %s\n", js_name);
+    printf("  Axes   : %d   Buttons: %d\n", num_axes, num_buttons);
+    printf("  Transport: %s\n", teleop_transport_mode_name(transport_mode));
+    if (transport_mode == TELEOP_TRANSPORT_MODE_KCP) {
+        printf("  KCP server: %s\n", kcp_server);
+        if (kcp_relay[0] != '\0')
+            printf("  Relay via : %s\n", kcp_relay);
+        printf("  Peer ID   : %s -> %s\n", peer_id, target_peer);
+    } else {
+        printf("  Target : %s:%d\n", ip, port);
+    }
+    printf("  Linear : %.2f m/s   Angular: %.2f rad/s\n", max_lin, max_ang);
+    printf("  Deadzone: %.2f\n", deadzone);
+    printf("----------------------------------------\n");
+    printf("  Left stick  → forward/back + strafe\n");
+    printf("  Right stick → turn\n");
+    printf("  A button    → emergency stop\n");
+    printf("  B button    → quit\n");
+    printf("========================================\n\n");
+
+    memset(&transport_config, 0, sizeof(transport_config));
+    transport_config.mode = transport_mode;
+    transport_config.udp_ip = ip;
+    transport_config.udp_port = port;
+    transport_config.server_addr = kcp_server;
+    transport_config.relay_via = kcp_relay;
+    transport_config.peer_id = peer_id;
+    transport_config.target_peer = target_peer;
+
+    if (teleop_transport_open(&transport, &transport_config) != 0) {
+        close(jsfd);
+        return 1;
+    }
+
+    /* ── state ───────────────────────────────────────────────────── */
+    float axes[MAX_AXES];
+    int   buttons[MAX_BUTTONS];
+    memset(axes, 0, sizeof(axes));
+    memset(buttons, 0, sizeof(buttons));
+
+    twist_cmd_t cmd;
+    twist_cmd_zero(&cmd);
+
+    struct timeval last_send;
+    gettimeofday(&last_send, NULL);
+
+    int e_stop = 0;
+
+    /* ── main loop ───────────────────────────────────────────────── */
+    while (g_running) {
+        /* read all pending joystick events */
+        struct js_event ev;
+        while (read(jsfd, &ev, sizeof(ev)) == sizeof(ev)) {
+            ev.type &= ~JS_EVENT_INIT;   /* strip init flag */
+            if (ev.type == JS_EVENT_AXIS && ev.number < MAX_AXES) {
+                axes[ev.number] = (float)ev.value / JS_AXIS_MAX;
+            } else if (ev.type == JS_EVENT_BUTTON && ev.number < MAX_BUTTONS) {
+                buttons[ev.number] = ev.value;
+                if (ev.number == BTN_QUIT && ev.value) {
+                    g_running = 0;
+                    break;
+                }
+                if (ev.number == BTN_STOP && ev.value) {
+                    e_stop = !e_stop;
+                    if (e_stop)
+                        printf("\r  ** EMERGENCY STOP **                   ");
+                    else
+                        printf("\r  ** E-STOP released **                  ");
+                    fflush(stdout);
+                }
+            }
+        }
+        /* EAGAIN is expected in non-blocking mode */
+        if (errno != EAGAIN && errno != 0) {
+            perror("read joystick");
+            break;
+        }
+        errno = 0;
+
+        /* map axes → twist (skip if e-stopped) */
+        if (e_stop) {
+            twist_cmd_zero(&cmd);
+        } else {
+            float lx_raw = apply_deadzone(-axes[AXIS_LY], deadzone); /* Y inverted */
+            float ly_raw = apply_deadzone(-axes[AXIS_LX], deadzone);
+            float az_raw = apply_deadzone(-axes[AXIS_RX], deadzone);
+
+            cmd.lx = lx_raw * max_lin;
+            cmd.ly = ly_raw * max_lin;
+            cmd.lz = 0.0f;
+            cmd.ax = 0.0f;
+            cmd.ay = 0.0f;
+            cmd.az = az_raw * max_ang;
+        }
+
+        /* rate-limit sending */
+        struct timeval now;
+        gettimeofday(&now, NULL);
+        long elapsed = (now.tv_sec - last_send.tv_sec) * 1000000
+                     + (now.tv_usec - last_send.tv_usec);
+        if (elapsed < SEND_INTERVAL_US) {
+            usleep(5000);   /* 5 ms sleep to avoid busy-spin */
+            continue;
+        }
+        last_send = now;
+
+        teleop_transport_send_twist(&transport, &cmd);
+
+        printf("\r  cmd: lx=%+.2f ly=%+.2f az=%+.2f  |  raw: LY=%+.2f LX=%+.2f RX=%+.2f   ",
+               cmd.lx, cmd.ly, cmd.az,
+               axes[AXIS_LY], axes[AXIS_LX], axes[AXIS_RX]);
+        fflush(stdout);
+    }
+
+    /* send final stop */
+    twist_cmd_zero(&cmd);
+    teleop_transport_send_twist(&transport, &cmd);
+
+    close(jsfd);
+    teleop_transport_close(&transport);
+    printf("\nStopped.\n");
+    return 0;
+}

ros-control-c/remote/keyboard_controller.c

@@ -0,0 +1,361 @@
+/*
+ * keyboard_controller.c - Keyboard teleop over UDP or KCP
+ *
+ * Keys:
+ *   W/Up    forward      S/Down  backward
+ *   A/Left  turn left    D/Right turn right
+ *   Q       strafe left  E       strafe right
+ *   Space   stop
+ *   [ / ]   linear speed down/up
+ *   - / =   angular speed down/up
+ *   Ctrl-C  quit
+ *
+ * Build:  gcc -Wall -O2 -I../common -o keyboard_controller keyboard_controller.c
+ * Usage:  ./keyboard_controller [-i IP] [-p PORT] [-l MAX_LIN] [-a MAX_ANG]
+ *                              [-t udp|kcp] [-s SERVER] [-r RELAY]
+ *                              [-I PEER_ID] [-T TARGET_PEER]
+ */
+
+#include <getopt.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "../common/protocol.h"
+#include "../common/teleop_transport.h"
+
+/*
+ * Terminals do not provide key-release events, so keep the last motion command
+ * alive briefly to bridge the initial auto-repeat delay while a key is held.
+ */
+#define KEY_HOLD_TIMEOUT_US 500000L
+
+static struct termios g_orig_termios;
+static volatile sig_atomic_t g_running = 1;
+
+static long elapsed_us(const struct timeval *start, const struct timeval *end)
+{
+    return (end->tv_sec - start->tv_sec) * 1000000L
+         + (end->tv_usec - start->tv_usec);
+}
+
+static int parse_port(const char *text, int *port_out)
+{
+    char *end = NULL;
+    long value = strtol(text, &end, 10);
+
+    if (end == text || *end != '\0' || value < 1 || value > 65535)
+        return -1;
+
+    *port_out = (int)value;
+    return 0;
+}
+
+static void restore_terminal(void)
+{
+    tcsetattr(STDIN_FILENO, TCSANOW, &g_orig_termios);
+    printf("\n\033[?25h");
+    fflush(stdout);
+}
+
+static void sigint_handler(int sig)
+{
+    (void)sig;
+    g_running = 0;
+}
+
+static void set_raw_mode(void)
+{
+    struct termios raw;
+    tcgetattr(STDIN_FILENO, &g_orig_termios);
+    atexit(restore_terminal);
+    raw = g_orig_termios;
+    raw.c_lflag &= ~(ICANON | ECHO | ISIG);
+    raw.c_cc[VMIN] = 0;
+    raw.c_cc[VTIME] = 0;
+    tcsetattr(STDIN_FILENO, TCSANOW, &raw);
+}
+
+static int read_key(long timeout_us)
+{
+    fd_set fds;
+    struct timeval tv;
+    unsigned char c;
+
+    FD_ZERO(&fds);
+    FD_SET(STDIN_FILENO, &fds);
+    tv.tv_sec = timeout_us / 1000000L;
+    tv.tv_usec = timeout_us % 1000000L;
+
+    if (select(STDIN_FILENO + 1, &fds, NULL, NULL, &tv) <= 0)
+        return -1;
+    if (read(STDIN_FILENO, &c, 1) != 1)
+        return -1;
+
+    if (c == 0x1B) {
+        unsigned char seq[2];
+
+        tv.tv_sec = 0;
+        tv.tv_usec = 20000;
+        FD_ZERO(&fds);
+        FD_SET(STDIN_FILENO, &fds);
+        if (select(STDIN_FILENO + 1, &fds, NULL, NULL, &tv) <= 0)
+            return 0x1B;
+        if (read(STDIN_FILENO, &seq[0], 1) != 1)
+            return 0x1B;
+
+        FD_ZERO(&fds);
+        FD_SET(STDIN_FILENO, &fds);
+        tv.tv_sec = 0;
+        tv.tv_usec = 20000;
+        if (select(STDIN_FILENO + 1, &fds, NULL, NULL, &tv) <= 0)
+            return 0x1B;
+        if (read(STDIN_FILENO, &seq[1], 1) != 1)
+            return 0x1B;
+
+        if (seq[0] == '[') {
+            switch (seq[1]) {
+            case 'A': return 'W';
+            case 'B': return 'S';
+            case 'D': return 'A';
+            case 'C': return 'D';
+            default: break;
+            }
+        }
+        return 0x1B;
+    }
+
+    if (c >= 'a' && c <= 'z')
+        c = (unsigned char)(c - ('a' - 'A'));
+    return c;
+}
+
+static void print_banner(void)
+{
+    printf("\033[2J\033[H");
+    printf("========================================\n");
+    printf("  Keyboard Teleop Controller\n");
+    printf("========================================\n");
+    printf("  W/Up    : forward      S/Down : back\n");
+    printf("  A/Left  : turn left    D/Right: turn right\n");
+    printf("  Q       : strafe left  E      : strafe right\n");
+    printf("  Space   : stop\n");
+    printf("  [ / ]   : linear speed  -/+\n");
+    printf("  - / =   : angular speed -/+\n");
+    printf("  Ctrl-C  : quit\n");
+    printf("========================================\n\n");
+}
+
+static void usage(const char *prog)
+{
+    fprintf(stderr,
+            "Usage: %s [options]\n"
+            "  -i IP       target IP   (default %s)\n"
+            "  -p PORT     target port (default %d)\n"
+            "  -l SPEED    max linear  speed m/s   (default 0.5)\n"
+            "  -a SPEED    max angular speed rad/s (default 0.5)\n"
+            "  -t MODE     transport mode udp|kcp  (default udp)\n"
+            "  -s ADDR     KCP server addr         (default %s)\n"
+            "  -r ADDR     KCP relay addr          (default none)\n"
+            "  -I ID       local KCP peer id       (default %s)\n"
+            "  -T ID       target KCP peer id      (default %s)\n"
+            "  -h          show help\n",
+            prog, DEFAULT_IP, DEFAULT_PORT,
+            DEFAULT_KCP_SERVER_ADDR,
+            DEFAULT_KCP_KEYBOARD_PEER_ID,
+            DEFAULT_KCP_TARGET_PEER_ID);
+}
+
+int main(int argc, char *argv[])
+{
+    char ip[64] = DEFAULT_IP;
+    int port = DEFAULT_PORT;
+    char kcp_server[OMNI_MAX_ADDR_TEXT] = DEFAULT_KCP_SERVER_ADDR;
+    char kcp_relay[OMNI_MAX_ADDR_TEXT] = "";
+    char peer_id[OMNI_MAX_PEER_ID] = DEFAULT_KCP_KEYBOARD_PEER_ID;
+    char target_peer[OMNI_MAX_PEER_ID] = DEFAULT_KCP_TARGET_PEER_ID;
+    float max_lin = 0.5f;
+    float max_ang = 0.5f;
+    const float speed_step = 0.1f;
+    teleop_transport_mode_t transport_mode = TELEOP_TRANSPORT_MODE_UDP;
+    teleop_transport_t transport;
+    teleop_transport_config_t transport_config;
+
+    int opt;
+    while ((opt = getopt(argc, argv, "i:p:l:a:t:s:r:I:T:h")) != -1) {
+        switch (opt) {
+        case 'i':
+            strncpy(ip, optarg, sizeof(ip) - 1);
+            ip[sizeof(ip) - 1] = '\0';
+            break;
+        case 'p':
+            if (parse_port(optarg, &port) != 0) {
+                fprintf(stderr, "Invalid port: %s (expected 1-65535)\n", optarg);
+                return 1;
+            }
+            break;
+        case 'l':
+            max_lin = strtof(optarg, NULL);
+            break;
+        case 'a':
+            max_ang = strtof(optarg, NULL);
+            break;
+        case 't':
+            if (teleop_transport_parse_mode(optarg, &transport_mode) != 0) {
+                fprintf(stderr, "Invalid transport mode: %s (expected udp or kcp)\n", optarg);
+                return 1;
+            }
+            break;
+        case 's':
+            strncpy(kcp_server, optarg, sizeof(kcp_server) - 1);
+            kcp_server[sizeof(kcp_server) - 1] = '\0';
+            break;
+        case 'r':
+            strncpy(kcp_relay, optarg, sizeof(kcp_relay) - 1);
+            kcp_relay[sizeof(kcp_relay) - 1] = '\0';
+            break;
+        case 'I':
+            strncpy(peer_id, optarg, sizeof(peer_id) - 1);
+            peer_id[sizeof(peer_id) - 1] = '\0';
+            break;
+        case 'T':
+            strncpy(target_peer, optarg, sizeof(target_peer) - 1);
+            target_peer[sizeof(target_peer) - 1] = '\0';
+            break;
+        default:
+            usage(argv[0]);
+            return (opt == 'h') ? 0 : 1;
+        }
+    }
+
+    memset(&transport_config, 0, sizeof(transport_config));
+    transport_config.mode = transport_mode;
+    transport_config.udp_ip = ip;
+    transport_config.udp_port = port;
+    transport_config.server_addr = kcp_server;
+    transport_config.relay_via = kcp_relay;
+    transport_config.peer_id = peer_id;
+    transport_config.target_peer = target_peer;
+
+    if (teleop_transport_open(&transport, &transport_config) != 0) {
+        return 1;
+    }
+
+    set_raw_mode();
+    signal(SIGINT, sigint_handler);
+    print_banner();
+    printf("  Transport: %s\n", teleop_transport_mode_name(transport_mode));
+    if (transport_mode == TELEOP_TRANSPORT_MODE_KCP) {
+        printf("  KCP server: %s\n", kcp_server);
+        if (kcp_relay[0] != '\0')
+            printf("  Relay via : %s\n", kcp_relay);
+        printf("  Peer ID   : %s -> %s\n", peer_id, target_peer);
+    } else {
+        printf("  Target: %s:%d\n", ip, port);
+    }
+    printf("  Linear: %.2f m/s   Angular: %.2f rad/s\n\n", max_lin, max_ang);
+    printf("\033[?25l");
+
+    twist_cmd_t cmd;
+    twist_cmd_zero(&cmd);
+
+    struct timeval last_send;
+    struct timeval last_motion_key;
+    gettimeofday(&last_send, NULL);
+    last_motion_key = last_send;
+
+    while (g_running) {
+        int key = read_key(SEND_INTERVAL_US);
+
+        if (key >= 0) {
+            twist_cmd_zero(&cmd);
+            switch (key) {
+            case 'W':
+                cmd.lx = max_lin;
+                gettimeofday(&last_motion_key, NULL);
+                break;
+            case 'S':
+                cmd.lx = -max_lin;
+                gettimeofday(&last_motion_key, NULL);
+                break;
+            case 'A':
+                cmd.az = max_ang;
+                gettimeofday(&last_motion_key, NULL);
+                break;
+            case 'D':
+                cmd.az = -max_ang;
+                gettimeofday(&last_motion_key, NULL);
+                break;
+            case 'Q':
+                cmd.ly = max_lin;
+                gettimeofday(&last_motion_key, NULL);
+                break;
+            case 'E':
+                cmd.ly = -max_lin;
+                gettimeofday(&last_motion_key, NULL);
+                break;
+            case ' ':
+                break;
+            case ']':
+                max_lin += speed_step;
+                printf("\r  Linear speed: %.2f m/s       ", max_lin);
+                fflush(stdout);
+                continue;
+            case '[':
+                max_lin = (max_lin > speed_step) ? max_lin - speed_step : speed_step;
+                printf("\r  Linear speed: %.2f m/s       ", max_lin);
+                fflush(stdout);
+                continue;
+            case '=':
+                max_ang += speed_step;
+                printf("\r  Angular speed: %.2f rad/s    ", max_ang);
+                fflush(stdout);
+                continue;
+            case '-':
+                max_ang = (max_ang > speed_step) ? max_ang - speed_step : speed_step;
+                printf("\r  Angular speed: %.2f rad/s    ", max_ang);
+                fflush(stdout);
+                continue;
+            case 0x03:
+                g_running = 0;
+                continue;
+            default:
+                continue;
+            }
+        } else {
+            struct timeval now;
+            gettimeofday(&now, NULL);
+            if (elapsed_us(&last_motion_key, &now) > KEY_HOLD_TIMEOUT_US)
+                twist_cmd_zero(&cmd);
+        }
+
+        {
+            struct timeval now;
+            long elapsed;
+
+            gettimeofday(&now, NULL);
+            elapsed = elapsed_us(&last_send, &now);
+            if (elapsed < SEND_INTERVAL_US)
+                continue;
+            last_send = now;
+        }
+
+        teleop_transport_send_twist(&transport, &cmd);
+
+        printf("\r  cmd: lx=%+.2f ly=%+.2f az=%+.2f  |  lin=%.2f ang=%.2f   ",
+               cmd.lx, cmd.ly, cmd.az, max_lin, max_ang);
+        fflush(stdout);
+    }
+
+    twist_cmd_zero(&cmd);
+    teleop_transport_send_twist(&transport, &cmd);
+
+    teleop_transport_close(&transport);
+    printf("\nStopped.\n");
+    return 0;
+}

ros-control-c/robot/udp_ros_bridge.py

@@ -0,0 +1,247 @@
+#!/usr/bin/env python3
+"""
+udp_ros_bridge.py — UDP/KCP → ROS2 TwistStamped bridge
+
+Receives 24-byte binary twist commands from keyboard/gamepad controllers
+via UDP or OmniSocket/KCP and publishes geometry_msgs/msg/TwistStamped to
+/hric/robot/cmd_vel.
+
+Usage:
+    ros2 run <your_pkg> udp_ros_bridge      (if installed as a ROS2 package)
+    python3 udp_ros_bridge.py               (standalone)
+
+ROS2 parameters:
+    transport  (string) — udp or kcp           (default udp)
+    udp_port   (int)    — UDP listen port         (default 9870)
+    kcp_server (string) — KCP hub addr            (default 127.0.0.1:9002)
+    kcp_relay_via (string) — optional relay addr  (default "")
+    peer_id    (string) — local KCP peer id       (default ros-bridge-ctrl)
+    expected_sender (string) — optional sender filter (default "")
+    topic      (string) — publish topic            (default /hric/robot/cmd_vel)
+    frame_id   (string) — TwistStamped frame_id    (default pelvis)
+    timeout    (float)  — watchdog timeout seconds  (default 0.5)
+"""
+
+from pathlib import Path
+import struct
+import socket
+import sys
+import threading
+import time
+
+import rclpy
+from rclpy.node import Node
+from geometry_msgs.msg import TwistStamped
+
+TWIST_CMD_FMT = '<6f'           # 6 little-endian floats, 24 bytes
+TWIST_CMD_SIZE = struct.calcsize(TWIST_CMD_FMT)
+
+
+def _load_omnisocket():
+    try:
+        from omnisocket import CONTROL_DEFAULTS, MSG_TYPE_BINARY, MSG_TYPE_ERROR, Session
+        return CONTROL_DEFAULTS, MSG_TYPE_BINARY, MSG_TYPE_ERROR, Session
+    except ImportError:
+        root = Path(__file__).resolve().parents[2]
+        python_dir = root / 'python'
+        if str(python_dir) not in sys.path:
+            sys.path.insert(0, str(python_dir))
+        from omnisocket import CONTROL_DEFAULTS, MSG_TYPE_BINARY, MSG_TYPE_ERROR, Session
+        return CONTROL_DEFAULTS, MSG_TYPE_BINARY, MSG_TYPE_ERROR, Session
+
+
+class UdpTeleopBridge(Node):
+
+    def __init__(self):
+        super().__init__('udp_teleop_bridge')
+
+        # declare parameters
+        self.declare_parameter('transport', 'udp')
+        self.declare_parameter('udp_port', 9870)
+        self.declare_parameter('kcp_server', '127.0.0.1:9002')
+        self.declare_parameter('kcp_relay_via', '')
+        self.declare_parameter('peer_id', 'ros-bridge-ctrl')
+        self.declare_parameter('expected_sender', '')
+        self.declare_parameter('topic', '/hric/robot/cmd_vel')
+        self.declare_parameter('frame_id', 'pelvis')
+        self.declare_parameter('timeout', 0.5)
+
+        self._transport = str(self.get_parameter('transport').value).strip().lower()
+        self._port     = self.get_parameter('udp_port').value
+        self._kcp_server = str(self.get_parameter('kcp_server').value)
+        self._kcp_relay_via = str(self.get_parameter('kcp_relay_via').value)
+        self._peer_id = str(self.get_parameter('peer_id').value)
+        self._expected_sender = str(self.get_parameter('expected_sender').value)
+        self._topic    = self.get_parameter('topic').value
+        self._frame_id = self.get_parameter('frame_id').value
+        self._timeout  = self.get_parameter('timeout').value
+
+        if self._transport not in ('udp', 'kcp'):
+            raise ValueError(f"Unsupported transport '{self._transport}', expected 'udp' or 'kcp'")
+
+        # publisher
+        self._pub = self.create_publisher(TwistStamped, self._topic, 10)
+
+        # watchdog timer
+        self._last_recv = time.monotonic()
+        self._lock = threading.Lock()
+        self._latest_cmd = (0.0, 0.0, 0.0, 0.0, 0.0, 0.0)
+        self._timer = self.create_timer(1.0 / 20.0, self._timer_cb)
+        self._sock = None
+        self._session = None
+        self._msg_type_binary = None
+        self._msg_type_error = None
+        self._closing = False
+
+        if self._transport == 'kcp':
+            control_defaults, self._msg_type_binary, self._msg_type_error, session_cls = _load_omnisocket()
+            self._session = session_cls()
+            self._session.connect(
+                server_addr=self._kcp_server,
+                peer_id=self._peer_id,
+                relay_via=self._kcp_relay_via,
+                **control_defaults,
+            )
+        else:
+            self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+            self._sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+            self._sock.bind(('0.0.0.0', self._port))
+            self._sock.settimeout(0.1)
+
+        # receive thread
+        recv_target = self._recv_loop_kcp if self._transport == 'kcp' else self._recv_loop_udp
+        self._recv_thread = threading.Thread(target=recv_target, daemon=True)
+        self._recv_thread.start()
+
+        if self._transport == 'kcp':
+            self.get_logger().info(
+                f'Bridge ready — KCP {self._kcp_server} as {self._peer_id} → {self._topic} '
+                f'(frame_id={self._frame_id}, timeout={self._timeout}s)'
+            )
+        else:
+            self.get_logger().info(
+                f'Bridge ready — UDP 0.0.0.0:{self._port} → {self._topic} '
+                f'(frame_id={self._frame_id}, timeout={self._timeout}s)'
+            )
+
+    def _recv_loop_udp(self):
+        """Background thread: receive UDP packets and update latest command."""
+        while rclpy.ok():
+            try:
+                data, addr = self._sock.recvfrom(TWIST_CMD_SIZE + 64)
+            except socket.timeout:
+                continue
+            except OSError:
+                break
+
+            if len(data) != TWIST_CMD_SIZE:
+                self.get_logger().warn(
+                    f'Packet has invalid size {len(data)} bytes from {addr}, '
+                    f'expected {TWIST_CMD_SIZE}'
+                )
+                continue
+
+            values = struct.unpack(TWIST_CMD_FMT, data)
+            with self._lock:
+                self._latest_cmd = values
+                self._last_recv = time.monotonic()
+
+    def _recv_loop_kcp(self):
+        """Background thread: receive KCP packets and update latest command."""
+        while rclpy.ok():
+            try:
+                result = self._session.recv(timeout_ms=100)
+            except OSError as exc:
+                if not self._closing:
+                    self.get_logger().error(f'KCP receive failed: {exc}')
+                break
+
+            if result is None:
+                continue
+
+            from_peer, msg_type, payload = result
+
+            if msg_type == self._msg_type_error:
+                self.get_logger().error(
+                    f'KCP server error from {from_peer}: {payload.decode("utf-8", errors="replace")}'
+                )
+                continue
+
+            if self._expected_sender and from_peer != self._expected_sender:
+                self.get_logger().warn(
+                    f'Ignoring KCP packet from unexpected sender {from_peer}, '
+                    f'expected {self._expected_sender}'
+                )
+                continue
+
+            if msg_type != self._msg_type_binary:
+                self.get_logger().warn(
+                    f'Ignoring non-binary KCP message type {msg_type} from {from_peer}'
+                )
+                continue
+
+            if len(payload) != TWIST_CMD_SIZE:
+                self.get_logger().warn(
+                    f'KCP payload has invalid size {len(payload)} bytes from {from_peer}, '
+                    f'expected {TWIST_CMD_SIZE}'
+                )
+                continue
+
+            values = struct.unpack(TWIST_CMD_FMT, payload)
+            with self._lock:
+                self._latest_cmd = values
+                self._last_recv = time.monotonic()
+
+    def _timer_cb(self):
+        """20 Hz: publish TwistStamped from latest received command."""
+        with self._lock:
+            elapsed = time.monotonic() - self._last_recv
+            if elapsed > self._timeout:
+                lx, ly, lz, ax, ay, az = 0.0, 0.0, 0.0, 0.0, 0.0, 0.0
+            else:
+                lx, ly, lz, ax, ay, az = self._latest_cmd
+
+        msg = TwistStamped()
+        msg.header.stamp = self.get_clock().now().to_msg()
+        msg.header.frame_id = self._frame_id
+        msg.twist.linear.x  = float(lx)
+        msg.twist.linear.y  = float(ly)
+        msg.twist.linear.z  = float(lz)
+        msg.twist.angular.x = float(ax)
+        msg.twist.angular.y = float(ay)
+        msg.twist.angular.z = float(az)
+
+        self._pub.publish(msg)
+
+    def destroy_node(self):
+        self._closing = True
+        if self._sock is not None:
+            self._sock.close()
+            self._sock = None
+        if self._session is not None:
+            try:
+                self._session.close()
+            except OSError as exc:
+                self.get_logger().warn(f'Closing KCP session failed: {exc}')
+            self._session = None
+        if hasattr(self, '_recv_thread') and self._recv_thread.is_alive():
+            self._recv_thread.join(timeout=0.2)
+        super().destroy_node()
+
+
+def main(args=None):
+    rclpy.init(args=args)
+    node = None
+    try:
+        node = UdpTeleopBridge()
+        rclpy.spin(node)
+    except KeyboardInterrupt:
+        pass
+    finally:
+        if node is not None:
+            node.destroy_node()
+        rclpy.shutdown()
+
+
+if __name__ == '__main__':
+    main()

ros-control-py/README.md

@@ -0,0 +1,257 @@
+# ROS2 Teleop over OmniSocket UDP/KCP
+
+`ros-control-py/udp_teleop_bridge` 现在把 teleop 控制流统一接到 OmniSocket peer 传输上。
+
+- `transport:=udp` 表示 OmniSocket UDP，经 `udpserver/udppeer` 的消息协议传输
+- `transport:=kcp` 表示 OmniSocket KCP，经 `kcpserver/kcppeer` 的消息协议传输
+- 不再使用原来的裸 `socket.sendto()/recvfrom()` UDP 路径
+
+机器人最终接收的话题保持不变:
+
+- topic: `/hric/robot/cmd_vel`
+- type: `geometry_msgs/msg/TwistStamped`
+- frame_id: `pelvis`
+
+控制负载也保持不变:
+
+- fixed payload: 24-byte little-endian `<6f>`
+- order: `lx, ly, lz, ax, ay, az`
+
+## 目录
+
+- `udp_teleop_bridge/udp_teleop_bridge/cmd_vel_udp_sender.py`: 订阅 `TwistStamped`，经 OmniSocket 发送 24 字节控制包
+- `udp_teleop_bridge/udp_teleop_bridge/udp_cmd_vel_receiver.py`: 从 OmniSocket 接收控制包，补时间戳并发布到机器人 ROS2 topic
+- `udp_teleop_bridge/udp_teleop_bridge/omni_transport.py`: 统一封装 OmniSocket UDP/KCP session
+- `udp_teleop_bridge/config/xbox_twist_joy.yaml`: Xbox 手柄映射
+- `udp_teleop_bridge/launch/*.launch.py`: Linux 启动入口
+
+## Linux 构建
+
+先安装 ROS 2 官方 teleop 依赖:
+
+```bash
+sudo apt install ros-${ROS_DISTRO}-joy ros-${ROS_DISTRO}-teleop-twist-joy ros-${ROS_DISTRO}-teleop-twist-keyboard
+```
+
+再构建并安装 OmniSocket Python 扩展:
+
+```bash
+make python-ext
+make python-install
+```
+
+最后构建 ROS 包:
+
+```bash
+colcon build --packages-select udp_teleop_bridge
+source install/setup.bash
+```
+
+如果 `omnisocket` 没有安装到当前 ROS Python 环境，sender/receiver 会直接报错退出。
+
+## 先验证机器人控制语义
+
+在机器人本机先直接低速发布 `/hric/robot/cmd_vel`，确认 `linear.x`、`linear.y`、`angular.z` 的物理方向符合预期:
+
+```bash
+ros2 topic pub /hric/robot/cmd_vel geometry_msgs/msg/TwistStamped \
+  "{header: {frame_id: pelvis}, twist: {linear: {x: 0.10, y: 0.0, z: 0.0}, angular: {x: 0.0, y: 0.0, z: 0.0}}}" \
+  -r 20
+```
+
+```bash
+ros2 topic pub /hric/robot/cmd_vel geometry_msgs/msg/TwistStamped \
+  "{header: {frame_id: pelvis}, twist: {linear: {x: 0.0, y: 0.10, z: 0.0}, angular: {x: 0.0, y: 0.0, z: 0.0}}}" \
+  -r 20
+```
+
+```bash
+ros2 topic pub /hric/robot/cmd_vel geometry_msgs/msg/TwistStamped \
+  "{header: {frame_id: pelvis}, twist: {linear: {x: 0.0, y: 0.0, z: 0.0}, angular: {x: 0.0, y: 0.0, z: 0.30}}}" \
+  -r 20
+```
+
+停止:
+
+```bash
+ros2 topic pub --once /hric/robot/cmd_vel geometry_msgs/msg/TwistStamped \
+  "{header: {frame_id: pelvis}, twist: {linear: {x: 0.0, y: 0.0, z: 0.0}, angular: {x: 0.0, y: 0.0, z: 0.0}}}"
+```
+
+## 启动 OmniSocket Hub
+
+OmniSocket UDP:
+
+```bash
+./bin/udpserver -listen :9001
+```
+
+OmniSocket KCP:
+
+```bash
+./bin/kcpserver -listen :9002 -telemetry-peer peer-a-telemetry
+```
+
+`server_addr` 不传时，节点会按 `transport` 自动选择默认值:
+
+- `udp` -> `127.0.0.1:9001`
+- `kcp` -> `127.0.0.1:9002`
+
+`relay_via` 只在 `transport:=kcp` 时生效。
+
+## 机器人端运行
+
+UDP:
+
+```bash
+ros2 launch udp_teleop_bridge robot_udp_receiver.launch.py \
+  transport:=udp \
+  server_addr:=127.0.0.1:9001 \
+  peer_id:=ros-bridge-ctrl \
+  output_topic:=/hric/robot/cmd_vel \
+  frame_id:=pelvis \
+  watchdog_timeout:=0.5
+```
+
+KCP:
+
+```bash
+ros2 launch udp_teleop_bridge robot_udp_receiver.launch.py \
+  transport:=kcp \
+  server_addr:=127.0.0.1:9002 \
+  peer_id:=ros-bridge-ctrl \
+  output_topic:=/hric/robot/cmd_vel \
+  frame_id:=pelvis \
+  watchdog_timeout:=0.5
+```
+
+如果只允许某个 sender 控制，可以加:
+
+```bash
+expected_sender:=ros-keyboard-ctrl
+```
+
+Local daemon handoff via Unix datagram:
+
+```bash
+ros2 launch udp_teleop_bridge robot_udp_receiver.launch.py \
+  transport:=unix_dgram \
+  local_socket_path:=/tmp/omnisocket-b-side-cmd.sock \
+  output_topic:=/hric/robot/cmd_vel \
+  frame_id:=pelvis \
+  watchdog_timeout:=0.5
+```
+
+## 控制端键盘运行
+
+终端 A，启动 sender:
+
+```bash
+ros2 launch udp_teleop_bridge keyboard_sender.launch.py \
+  transport:=udp \
+  server_addr:=127.0.0.1:9001 \
+  peer_id:=ros-keyboard-ctrl \
+  target_peer:=ros-bridge-ctrl
+```
+
+如果走 KCP:
+
+```bash
+ros2 launch udp_teleop_bridge keyboard_sender.launch.py \
+  transport:=kcp \
+  server_addr:=127.0.0.1:9002 \
+  peer_id:=ros-keyboard-ctrl \
+  target_peer:=ros-bridge-ctrl
+```
+
+终端 B，启动官方键盘 teleop:
+
+```bash
+ros2 run teleop_twist_keyboard teleop_twist_keyboard --ros-args \
+  --remap cmd_vel:=/teleop/cmd_vel \
+  -p stamped:=true \
+  -p frame_id:=pelvis \
+  -p speed:=0.20 \
+  -p turn:=0.60
+```
+
+键盘默认键位（`teleop_twist_keyboard`，建议使用 US 键盘布局）:
+
+- `i`: 前进（`linear.x > 0`）
+- `,`: 后退（`linear.x < 0`）
+- `j`: 左转（`angular.z > 0`）
+- `l`: 右转（`angular.z < 0`）
+- `Shift + J`: 左平移（`linear.y > 0`）
+- `Shift + L`: 右平移（`linear.y < 0`）
+- `u` / `o` / `m` / `.`: 组合前进或后退加转向
+- `k` 或其他未映射按键: 停止
+- `q` / `z`: 整体速度增加 / 降低 10%
+- `w` / `x`: 仅线速度增加 / 降低 10%
+- `e` / `c`: 仅角速度增加 / 降低 10%
+- `Ctrl-C`: 退出键盘 teleop
+
+## 控制端 Xbox 手柄运行
+
+UDP:
+
+```bash
+ros2 launch udp_teleop_bridge xbox_to_udp.launch.py \
+  transport:=udp \
+  server_addr:=127.0.0.1:9001 \
+  peer_id:=ros-gamepad-ctrl \
+  target_peer:=ros-bridge-ctrl \
+  joy_dev:=/dev/input/js0 \
+  frame_id:=pelvis
+```
+
+KCP:
+
+```bash
+ros2 launch udp_teleop_bridge xbox_to_udp.launch.py \
+  transport:=kcp \
+  server_addr:=127.0.0.1:9002 \
+  peer_id:=ros-gamepad-ctrl \
+  target_peer:=ros-bridge-ctrl \
+  joy_dev:=/dev/input/js0 \
+  frame_id:=pelvis
+```
+
+当前默认手柄映射:
+
+- 左摇杆上下 -> `linear.x`
+- 左摇杆左右 -> `linear.y`
+- 右摇杆左右 -> `angular.z`
+- `RB` 按住才允许运动
+- `LB` 为 turbo
+
+手柄实际操控含义（基于 `config/xbox_twist_joy.yaml` 的 Xbox 默认映射）:
+
+- 左摇杆向前 / 向后: 前进 / 后退
+- 左摇杆向左 / 向右: 左平移 / 右平移
+- 右摇杆向左 / 向右: 左转 / 右转
+- 按住 `RB`: 以常速启用运动输出
+- 同时按住 `LB` + `RB`: 启用 turbo，更高的线速度和角速度
+- 松开 `RB` 或将摇杆回中: 输出回到零速
+
+## 数据流
+
+键盘链路:
+
+```text
+teleop_twist_keyboard -> /teleop/cmd_vel (TwistStamped) -> cmd_vel_udp_sender -> OmniSocket UDP/KCP -> udp_cmd_vel_receiver -> /hric/robot/cmd_vel
+```
+
+手柄链路:
+
+```text
+joy_node -> teleop_twist_joy -> /teleop/cmd_vel (TwistStamped) -> cmd_vel_udp_sender -> OmniSocket UDP/KCP -> udp_cmd_vel_receiver -> /hric/robot/cmd_vel
+```
+
+## 安全行为
+
+- sender 默认按 20 Hz 重发最新命令
+- sender 输入超时后会改发零速
+- sender 退出时会主动发送数个零速控制包
+- receiver 超时后会在 ROS 主线程发布零速 stop
+- receiver 只接受 `MSG_TYPE_BINARY` 且长度为 24 字节的负载
+- 非预期 sender、非 binary 消息、错误长度消息都会被丢弃并记录日志

ros-control-py/ROS2 Teleop over UDP.md

@@ -0,0 +1,153 @@
+## ROS2 Teleop over OmniSocket UDP/KCP
+
+这个文档对应 `ros-control-py/udp_teleop_bridge` 的当前实现。
+
+核心变化:
+
+- `transport:=udp` 现在表示 OmniSocket UDP
+- `transport:=kcp` 表示 OmniSocket KCP
+- 不再使用原来的裸 `socket` UDP 实现
+
+控制接口保持不变:
+
+- topic: `/hric/robot/cmd_vel`
+- type: `geometry_msgs/msg/TwistStamped`
+- frame_id: `pelvis`
+- payload: fixed 24-byte little-endian `<6f>`
+
+负载顺序:
+
+`lx, ly, lz, ax, ay, az`
+
+### 构建顺序
+
+```bash
+make python-ext
+make python-install
+```
+
+```bash
+colcon build --packages-select udp_teleop_bridge
+source install/setup.bash
+```
+
+### 启动 Hub
+
+OmniSocket UDP:
+
+```bash
+./bin/udpserver -listen :9001
+```
+
+OmniSocket KCP:
+
+```bash
+./bin/kcpserver -listen :9002 -telemetry-peer peer-a-telemetry
+```
+
+### 机器人端 Receiver
+
+```bash
+ros2 launch udp_teleop_bridge robot_udp_receiver.launch.py \
+  transport:=udp \
+  server_addr:=127.0.0.1:9001 \
+  peer_id:=ros-bridge-ctrl \
+  output_topic:=/hric/robot/cmd_vel \
+  frame_id:=pelvis \
+  watchdog_timeout:=0.5
+```
+
+KCP 只需把 `transport` 和 `server_addr` 改成:
+
+```bash
+transport:=kcp server_addr:=127.0.0.1:9002
+```
+
+如果控制命令来自本机 `b_side_omnid`，可以改为:
+
+```bash
+transport:=unix_dgram local_socket_path:=/tmp/omnisocket-b-side-cmd.sock
+```
+
+只接受指定 sender:
+
+```bash
+expected_sender:=ros-keyboard-ctrl
+```
+
+### 键盘 Sender
+
+```bash
+ros2 launch udp_teleop_bridge keyboard_sender.launch.py \
+  transport:=udp \
+  server_addr:=127.0.0.1:9001 \
+  peer_id:=ros-keyboard-ctrl \
+  target_peer:=ros-bridge-ctrl
+```
+
+```bash
+ros2 run teleop_twist_keyboard teleop_twist_keyboard --ros-args \
+  --remap cmd_vel:=/teleop/cmd_vel \
+  -p stamped:=true \
+  -p frame_id:=pelvis \
+  -p speed:=0.20 \
+  -p turn:=0.60
+```
+
+### Xbox Sender
+
+```bash
+ros2 launch udp_teleop_bridge xbox_to_udp.launch.py \
+  transport:=udp \
+  server_addr:=127.0.0.1:9001 \
+  peer_id:=ros-gamepad-ctrl \
+  target_peer:=ros-bridge-ctrl \
+  joy_dev:=/dev/input/js0 \
+  frame_id:=pelvis
+```
+
+### 参数语义
+
+- sender:
+  - `transport`
+  - `server_addr`
+  - `relay_via`
+  - `peer_id`
+  - `target_peer`
+  - `input_topic`
+  - `send_rate_hz`
+  - `input_timeout`
+- receiver:
+  - `transport`
+  - `server_addr`
+  - `relay_via`
+  - `peer_id`
+  - `expected_sender`
+  - `output_topic`
+  - `frame_id`
+  - `watchdog_timeout`
+  - `publish_rate_hz`
+
+`server_addr` 省略时，会按 transport 自动选择:
+
+- `udp` -> `127.0.0.1:9001`
+- `kcp` -> `127.0.0.1:9002`
+
+### 数据流
+
+```text
+teleop_twist_keyboard / teleop_twist_joy
+  -> /teleop/cmd_vel (TwistStamped)
+  -> cmd_vel_udp_sender
+  -> OmniSocket UDP/KCP binary message
+  -> udp_cmd_vel_receiver
+  -> /hric/robot/cmd_vel
+```
+
+### 安全与约束
+
+- sender 默认 20 Hz 重发
+- sender 输入超时后改发零速
+- receiver watchdog 超时后发零速 stop
+- receiver 只接受 24 字节 binary 负载
+- `relay_via` 只在 KCP 模式有效

ros-control-py/udp_teleop_bridge/config/xbox_twist_joy.yaml

@@ -0,0 +1,32 @@
+/**:
+  ros__parameters:
+    require_enable_button: true
+    enable_button: 5
+    enable_turbo_button: 4
+    axis_linear:
+      x: 1
+      y: 0
+      z: -1
+    scale_linear:
+      x: -0.30
+      y: -0.25
+      z: 0.0
+    scale_linear_turbo:
+      x: -0.60
+      y: -0.45
+      z: 0.0
+    axis_angular:
+      yaw: 3
+      pitch: -1
+      roll: -1
+    scale_angular:
+      yaw: -0.80
+      pitch: 0.0
+      roll: 0.0
+    scale_angular_turbo:
+      yaw: -1.20
+      pitch: 0.0
+      roll: 0.0
+    inverted_reverse: false
+    publish_stamped_twist: true
+    frame: pelvis

ros-control-py/udp_teleop_bridge/launch/keyboard_sender.launch.py

@@ -0,0 +1,34 @@
+from launch import LaunchDescription
+from launch.actions import DeclareLaunchArgument
+from launch.substitutions import LaunchConfiguration
+from launch_ros.actions import Node
+from launch_ros.parameter_descriptions import ParameterValue
+
+
+def generate_launch_description() -> LaunchDescription:
+    return LaunchDescription([
+        DeclareLaunchArgument('transport', default_value='udp'),
+        DeclareLaunchArgument('server_addr', default_value=''),
+        DeclareLaunchArgument('relay_via', default_value=''),
+        DeclareLaunchArgument('peer_id', default_value='ros-keyboard-ctrl'),
+        DeclareLaunchArgument('target_peer', default_value='ros-bridge-ctrl'),
+        DeclareLaunchArgument('input_topic', default_value='/teleop/cmd_vel'),
+        DeclareLaunchArgument('send_rate_hz', default_value='20.0'),
+        DeclareLaunchArgument('input_timeout', default_value='0.75'),
+        Node(
+            package='udp_teleop_bridge',
+            executable='cmd_vel_udp_sender',
+            name='cmd_vel_udp_sender',
+            output='screen',
+            parameters=[{
+                'transport': LaunchConfiguration('transport'),
+                'server_addr': LaunchConfiguration('server_addr'),
+                'relay_via': LaunchConfiguration('relay_via'),
+                'peer_id': LaunchConfiguration('peer_id'),
+                'target_peer': LaunchConfiguration('target_peer'),
+                'input_topic': LaunchConfiguration('input_topic'),
+                'send_rate_hz': ParameterValue(LaunchConfiguration('send_rate_hz'), value_type=float),
+                'input_timeout': ParameterValue(LaunchConfiguration('input_timeout'), value_type=float),
+            }],
+        ),
+    ])

ros-control-py/udp_teleop_bridge/launch/robot_udp_receiver.launch.py

@@ -0,0 +1,38 @@
+from launch import LaunchDescription
+from launch.actions import DeclareLaunchArgument
+from launch.substitutions import LaunchConfiguration
+from launch_ros.actions import Node
+from launch_ros.parameter_descriptions import ParameterValue
+
+
+def generate_launch_description() -> LaunchDescription:
+    return LaunchDescription([
+        DeclareLaunchArgument('transport', default_value='udp'),
+        DeclareLaunchArgument('server_addr', default_value=''),
+        DeclareLaunchArgument('relay_via', default_value=''),
+        DeclareLaunchArgument('peer_id', default_value='ros-bridge-ctrl'),
+        DeclareLaunchArgument('expected_sender', default_value=''),
+        DeclareLaunchArgument('local_socket_path', default_value='/tmp/omnisocket-b-side-cmd.sock'),
+        DeclareLaunchArgument('output_topic', default_value='/hric/robot/cmd_vel'),
+        DeclareLaunchArgument('frame_id', default_value='pelvis'),
+        DeclareLaunchArgument('watchdog_timeout', default_value='0.5'),
+        DeclareLaunchArgument('publish_rate_hz', default_value='100.0'),
+        Node(
+            package='udp_teleop_bridge',
+            executable='udp_cmd_vel_receiver',
+            name='udp_cmd_vel_receiver',
+            output='screen',
+            parameters=[{
+                'transport': LaunchConfiguration('transport'),
+                'server_addr': LaunchConfiguration('server_addr'),
+                'relay_via': LaunchConfiguration('relay_via'),
+                'peer_id': LaunchConfiguration('peer_id'),
+                'expected_sender': LaunchConfiguration('expected_sender'),
+                'local_socket_path': LaunchConfiguration('local_socket_path'),
+                'output_topic': LaunchConfiguration('output_topic'),
+                'frame_id': LaunchConfiguration('frame_id'),
+                'watchdog_timeout': ParameterValue(LaunchConfiguration('watchdog_timeout'), value_type=float),
+                'publish_rate_hz': ParameterValue(LaunchConfiguration('publish_rate_hz'), value_type=float),
+            }],
+        ),
+    ])

ros-control-py/udp_teleop_bridge/launch/xbox_to_udp.launch.py

@@ -0,0 +1,74 @@
+from launch import LaunchDescription
+from launch.actions import DeclareLaunchArgument
+from launch.substitutions import LaunchConfiguration, PathJoinSubstitution
+from launch_ros.actions import Node
+from launch_ros.parameter_descriptions import ParameterValue
+from launch_ros.substitutions import FindPackageShare
+
+
+def generate_launch_description() -> LaunchDescription:
+    teleop_config = PathJoinSubstitution([
+        FindPackageShare('udp_teleop_bridge'),
+        'config',
+        'xbox_twist_joy.yaml',
+    ])
+
+    teleop_topic = LaunchConfiguration('teleop_topic')
+
+    return LaunchDescription([
+        DeclareLaunchArgument('transport', default_value='udp'),
+        DeclareLaunchArgument('server_addr', default_value=''),
+        DeclareLaunchArgument('relay_via', default_value=''),
+        DeclareLaunchArgument('peer_id', default_value='ros-gamepad-ctrl'),
+        DeclareLaunchArgument('target_peer', default_value='ros-bridge-ctrl'),
+        DeclareLaunchArgument('joy_dev', default_value='/dev/input/js0'),
+        DeclareLaunchArgument('deadzone', default_value='0.10'),
+        DeclareLaunchArgument('autorepeat_rate', default_value='20.0'),
+        DeclareLaunchArgument('frame_id', default_value='pelvis'),
+        DeclareLaunchArgument('teleop_topic', default_value='/teleop/cmd_vel'),
+        DeclareLaunchArgument('send_rate_hz', default_value='20.0'),
+        DeclareLaunchArgument('input_timeout', default_value='0.30'),
+        Node(
+            package='joy',
+            executable='joy_node',
+            name='joy_node',
+            output='screen',
+            parameters=[{
+                'dev': LaunchConfiguration('joy_dev'),
+                'deadzone': ParameterValue(LaunchConfiguration('deadzone'), value_type=float),
+                'autorepeat_rate': ParameterValue(LaunchConfiguration('autorepeat_rate'), value_type=float),
+            }],
+        ),
+        Node(
+            package='teleop_twist_joy',
+            executable='teleop_node',
+            name='teleop_twist_joy',
+            output='screen',
+            parameters=[
+                teleop_config,
+                {
+                    'publish_stamped_twist': True,
+                    'frame': LaunchConfiguration('frame_id'),
+                },
+            ],
+            remappings=[
+                ('cmd_vel', teleop_topic),
+            ],
+        ),
+        Node(
+            package='udp_teleop_bridge',
+            executable='cmd_vel_udp_sender',
+            name='cmd_vel_udp_sender',
+            output='screen',
+            parameters=[{
+                'transport': LaunchConfiguration('transport'),
+                'server_addr': LaunchConfiguration('server_addr'),
+                'relay_via': LaunchConfiguration('relay_via'),
+                'peer_id': LaunchConfiguration('peer_id'),
+                'target_peer': LaunchConfiguration('target_peer'),
+                'input_topic': teleop_topic,
+                'send_rate_hz': ParameterValue(LaunchConfiguration('send_rate_hz'), value_type=float),
+                'input_timeout': ParameterValue(LaunchConfiguration('input_timeout'), value_type=float),
+            }],
+        ),
+    ])

ros-control-py/udp_teleop_bridge/package.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0"?>
+<package format="3">
+  <name>udp_teleop_bridge</name>
+  <version>0.1.0</version>
+  <description>ROS 2 OmniSocket UDP/KCP bridge for teleop TwistStamped commands.</description>
+
+  <maintainer email="codex@example.com">Codex</maintainer>
+  <license>MIT</license>
+
+  <buildtool_depend>ament_python</buildtool_depend>
+
+  <exec_depend>ament_index_python</exec_depend>
+  <exec_depend>geometry_msgs</exec_depend>
+  <exec_depend>joy</exec_depend>
+  <exec_depend>launch</exec_depend>
+  <exec_depend>launch_ros</exec_depend>
+  <exec_depend>rclpy</exec_depend>
+  <exec_depend>rosidl_runtime_py</exec_depend>
+  <exec_depend>teleop_twist_joy</exec_depend>
+  <exec_depend>teleop_twist_keyboard</exec_depend>
+
+  <export>
+    <build_type>ament_python</build_type>
+  </export>
+</package>

ros-control-py/udp_teleop_bridge/resource/udp_teleop_bridge

@@ -0,0 +1 @@
+udp_teleop_bridge

ros-control-py/udp_teleop_bridge/setup.cfg

@@ -0,0 +1,5 @@
+[develop]
+script_dir=$base/lib/udp_teleop_bridge
+
+[install]
+install_scripts=$base/lib/udp_teleop_bridge

ros-control-py/udp_teleop_bridge/setup.py

@@ -0,0 +1,35 @@
+from setuptools import find_packages, setup
+
+
+package_name = 'udp_teleop_bridge'
+
+
+setup(
+    name=package_name,
+    version='0.1.0',
+    packages=find_packages(exclude=['test']),
+    data_files=[
+        ('share/ament_index/resource_index/packages', [f'resource/{package_name}']),
+        (f'share/{package_name}', ['package.xml']),
+        (f'share/{package_name}/launch', [
+            'launch/keyboard_sender.launch.py',
+            'launch/robot_udp_receiver.launch.py',
+            'launch/xbox_to_udp.launch.py',
+        ]),
+        (f'share/{package_name}/config', ['config/xbox_twist_joy.yaml']),
+    ],
+    install_requires=['setuptools'],
+    zip_safe=True,
+    maintainer='Codex',
+    maintainer_email='codex@example.com',
+    description='ROS 2 OmniSocket UDP/KCP bridge for teleop TwistStamped commands.',
+    license='MIT',
+    tests_require=['pytest'],
+    entry_points={
+        'console_scripts': [
+            'cmd_vel_udp_sender = udp_teleop_bridge.cmd_vel_udp_sender:main',
+            'udp_cmd_vel_receiver = udp_teleop_bridge.udp_cmd_vel_receiver:main',
+            'topic_status_reader = udp_teleop_bridge.topic_status_reader:main',
+        ],
+    },
+)

ros-control-py/udp_teleop_bridge/test/test_protocol.py

@@ -0,0 +1,54 @@
+from pathlib import Path
+import sys
+
+import pytest
+
+
+ROOT = Path(__file__).resolve().parents[1]
+if str(ROOT) not in sys.path:
+    sys.path.insert(0, str(ROOT))
+
+from udp_teleop_bridge.protocol import (  # noqa: E402
+    PACKET_SIZE,
+    default_server_addr_for_transport,
+    normalize_command,
+    normalize_transport,
+    pack_command,
+    unpack_command,
+)
+
+
+def test_pack_unpack_round_trip() -> None:
+    command = (0.1, -0.2, 0.3, -0.4, 0.5, -0.6)
+
+    payload = pack_command(command)
+
+    assert len(payload) == PACKET_SIZE
+    assert unpack_command(payload) == pytest.approx(command)
+
+
+@pytest.mark.parametrize('value', [float('nan'), float('inf'), float('-inf')])
+def test_normalize_command_rejects_non_finite_values(value: float) -> None:
+    with pytest.raises(ValueError, match='non-finite'):
+        normalize_command((0.0, 0.0, value, 0.0, 0.0, 0.0))
+
+
+def test_unpack_command_rejects_wrong_length() -> None:
+    with pytest.raises(ValueError, match='Expected'):
+        unpack_command(b'\x00' * (PACKET_SIZE - 1))
+
+
+@pytest.mark.parametrize(
+    ('transport', 'expected'),
+    [
+        ('udp', '127.0.0.1:9001'),
+        ('kcp', '127.0.0.1:9002'),
+    ],
+)
+def test_default_server_addr_for_transport(transport: str, expected: str) -> None:
+    assert default_server_addr_for_transport(transport) == expected
+
+
+def test_normalize_transport_rejects_unknown_value() -> None:
+    with pytest.raises(ValueError, match='Unsupported transport'):
+        normalize_transport('sctp')

ros-control-py/udp_teleop_bridge/udp_teleop_bridge/__init__.py

@@ -0,0 +1 @@
+"""OmniSocket teleop bridge package."""

ros-control-py/udp_teleop_bridge/udp_teleop_bridge/cmd_vel_udp_sender.py

@@ -0,0 +1,207 @@
+"""ROS 2 node that forwards TwistStamped teleop commands over OmniSocket."""
+
+from __future__ import annotations
+
+import threading
+import time
+from typing import Dict, Optional, Tuple
+
+import rclpy
+from geometry_msgs.msg import TwistStamped
+from rclpy.node import Node
+
+from .omni_transport import MSG_TYPE_ERROR, OmniTransport
+from .protocol import (
+    DEFAULT_EXIT_ZERO_PACKETS,
+    DEFAULT_INPUT_TIMEOUT,
+    DEFAULT_INPUT_TOPIC,
+    DEFAULT_KEYBOARD_PEER_ID,
+    DEFAULT_QUEUE_DEPTH,
+    DEFAULT_SEND_RATE_HZ,
+    DEFAULT_TARGET_PEER,
+    DEFAULT_TRANSPORT,
+    ZERO_COMMAND,
+    pack_command,
+)
+
+
+CommandTuple = Tuple[float, float, float, float, float, float]
+
+
+class CmdVelUdpSender(Node):
+    """Forward TwistStamped messages to a remote OmniSocket peer."""
+
+    def __init__(self) -> None:
+        super().__init__('cmd_vel_udp_sender')
+
+        self.declare_parameter('transport', DEFAULT_TRANSPORT)
+        self.declare_parameter('server_addr', '')
+        self.declare_parameter('relay_via', '')
+        self.declare_parameter('peer_id', DEFAULT_KEYBOARD_PEER_ID)
+        self.declare_parameter('target_peer', DEFAULT_TARGET_PEER)
+        self.declare_parameter('input_topic', DEFAULT_INPUT_TOPIC)
+        self.declare_parameter('send_rate_hz', DEFAULT_SEND_RATE_HZ)
+        self.declare_parameter('input_timeout', DEFAULT_INPUT_TIMEOUT)
+        self.declare_parameter('queue_depth', DEFAULT_QUEUE_DEPTH)
+        self.declare_parameter('exit_zero_packets', DEFAULT_EXIT_ZERO_PACKETS)
+
+        self._transport_name = str(self.get_parameter('transport').value)
+        self._server_addr = str(self.get_parameter('server_addr').value)
+        self._relay_via = str(self.get_parameter('relay_via').value)
+        self._peer_id = str(self.get_parameter('peer_id').value)
+        self._target_peer = str(self.get_parameter('target_peer').value).strip()
+        self._input_topic = str(self.get_parameter('input_topic').value)
+        self._send_rate_hz = float(self.get_parameter('send_rate_hz').value)
+        self._input_timeout = float(self.get_parameter('input_timeout').value)
+        self._queue_depth = int(self.get_parameter('queue_depth').value)
+        self._exit_zero_packets = int(self.get_parameter('exit_zero_packets').value)
+
+        if self._send_rate_hz <= 0.0:
+            raise ValueError('send_rate_hz must be > 0')
+        if self._input_timeout < 0.0:
+            raise ValueError('input_timeout must be >= 0')
+        if self._queue_depth <= 0:
+            raise ValueError('queue_depth must be > 0')
+        if not self._target_peer:
+            raise ValueError('target_peer must not be empty')
+
+        self._transport = OmniTransport(
+            transport=self._transport_name,
+            server_addr=self._server_addr,
+            relay_via=self._relay_via,
+            peer_id=self._peer_id,
+        )
+        self._last_log_times: Dict[str, float] = {}
+        self._latest_command: CommandTuple = ZERO_COMMAND
+        self._last_input_monotonic: Optional[float] = None
+        self._last_sent_command: Optional[CommandTuple] = None
+        self._closing = threading.Event()
+
+        self.create_subscription(
+            TwistStamped,
+            self._input_topic,
+            self._handle_twist,
+            self._queue_depth,
+        )
+        self.create_timer(1.0 / self._send_rate_hz, self._send_latest_command)
+
+        self._drain_thread = threading.Thread(target=self._drain_incoming, daemon=True)
+        self._drain_thread.start()
+
+        self.get_logger().info(
+            'Forwarding TwistStamped from %s via %s://%s as %s -> %s at %.1f Hz '
+            '(input timeout %.2f s)'
+            % (
+                self._input_topic,
+                self._transport.transport,
+                self._transport.server_addr,
+                self._peer_id,
+                self._target_peer,
+                self._send_rate_hz,
+                self._input_timeout,
+            )
+        )
+
+    def _should_log(self, key: str, throttle_sec: float) -> bool:
+        now = time.monotonic()
+        previous = self._last_log_times.get(key)
+        if previous is None or (now - previous) >= throttle_sec:
+            self._last_log_times[key] = now
+            return True
+        return False
+
+    def _handle_twist(self, msg: TwistStamped) -> None:
+        self._latest_command = (
+            float(msg.twist.linear.x),
+            float(msg.twist.linear.y),
+            float(msg.twist.linear.z),
+            float(msg.twist.angular.x),
+            float(msg.twist.angular.y),
+            float(msg.twist.angular.z),
+        )
+        self._last_input_monotonic = time.monotonic()
+
+    def _command_for_current_tick(self) -> CommandTuple:
+        if self._last_input_monotonic is None:
+            return ZERO_COMMAND
+        if self._input_timeout == 0.0:
+            return self._latest_command
+        age = time.monotonic() - self._last_input_monotonic
+        if age > self._input_timeout:
+            return ZERO_COMMAND
+        return self._latest_command
+
+    def _send_command(self, command: CommandTuple) -> None:
+        payload = pack_command(command)
+        try:
+            self._transport.send(to=self._target_peer, data=payload)
+            self._last_sent_command = command
+        except OSError as exc:
+            if self._should_log('send_error', 2.0):
+                self.get_logger().error(f'OmniSocket send failed: {exc}')
+
+    def _send_latest_command(self) -> None:
+        self._send_command(self._command_for_current_tick())
+
+    def _log_inbound_message(self, from_peer: str, msg_type: int, payload: bytes) -> None:
+        if msg_type == MSG_TYPE_ERROR:
+            if self._should_log('server_error', 1.0):
+                text = payload.decode('utf-8', errors='replace')
+                self.get_logger().error(f'OmniSocket server error from {from_peer}: {text}')
+            return
+
+        if self._should_log('unexpected_inbound', 2.0):
+            self.get_logger().warning(
+                'Ignoring unexpected inbound message type %d from %s (%d bytes)'
+                % (msg_type, from_peer, len(payload))
+            )
+
+    def _drain_incoming(self) -> None:
+        while not self._closing.is_set() and rclpy.ok():
+            try:
+                result = self._transport.recv(timeout_ms=100)
+            except OSError as exc:
+                if not self._closing.is_set() and self._should_log('drain_error', 2.0):
+                    self.get_logger().error(f'OmniSocket receive loop stopped: {exc}')
+                return
+
+            if result is None:
+                continue
+
+            from_peer, msg_type, payload = result
+            self._log_inbound_message(from_peer, msg_type, payload)
+
+    def send_zero_burst(self) -> None:
+        """Best-effort stop command sent during shutdown."""
+        for _ in range(max(1, self._exit_zero_packets)):
+            self._send_command(ZERO_COMMAND)
+            time.sleep(0.02)
+
+    def close(self) -> None:
+        self._closing.set()
+        if hasattr(self, '_transport') and self._transport is not None:
+            try:
+                self._transport.close()
+            except OSError as exc:
+                if self._should_log('close_error', 2.0):
+                    self.get_logger().warning(f'Closing OmniSocket transport failed: {exc}')
+            self._transport = None
+        if hasattr(self, '_drain_thread') and self._drain_thread.is_alive():
+            self._drain_thread.join(timeout=0.5)
+
+    def destroy_node(self) -> bool:
+        self.close()
+        return super().destroy_node()
+
+
+def main(args: Optional[list[str]] = None) -> None:
+    rclpy.init(args=args)
+    node = CmdVelUdpSender()
+    try:
+        rclpy.spin(node)
+    except KeyboardInterrupt:
+        pass
+    finally:
+        node.send_zero_burst()
+        node.destroy_node()
+        rclpy.shutdown()

ros-control-py/udp_teleop_bridge/udp_teleop_bridge/omni_transport.py

@@ -0,0 +1,95 @@
+"""Helpers for working with OmniSocket transport sessions."""
+
+from __future__ import annotations
+
+from .protocol import default_server_addr_for_transport, normalize_transport
+
+
+try:
+    from omnisocket import (
+        CONTROL_DEFAULTS,
+        MSG_TYPE_BINARY,
+        MSG_TYPE_ERROR,
+        Session,
+        UdpSession,
+    )
+except ImportError as exc:  # pragma: no cover - depends on external build/install
+    raise RuntimeError(
+        'omnisocket is not installed for this Python environment; run '
+        '`make python-ext && make python-install` on a Linux host first'
+    ) from exc
+
+
+def _normalize_optional(value: object) -> str:
+    return str(value).strip()
+
+
+class OmniTransport:
+    """Small wrapper that normalizes OmniSocket UDP/KCP session setup."""
+
+    def __init__(
+        self,
+        *,
+        transport: object,
+        server_addr: object,
+        peer_id: object,
+        relay_via: object = '',
+        bind_ip: object = '',
+        bind_device: object = '',
+        enable_timestamping: bool = False,
+    ) -> None:
+        self.transport = normalize_transport(transport)
+        self.server_addr = _normalize_optional(server_addr) or default_server_addr_for_transport(self.transport)
+        self.peer_id = _normalize_optional(peer_id)
+        self.relay_via = _normalize_optional(relay_via)
+        self.bind_ip = _normalize_optional(bind_ip)
+        self.bind_device = _normalize_optional(bind_device)
+
+        if not self.peer_id:
+            raise ValueError('peer_id must not be empty')
+
+        session_cls = Session if self.transport == 'kcp' else UdpSession
+        self._session = session_cls()
+
+        connect_kwargs: dict[str, object] = {
+            'server_addr': self.server_addr,
+            'peer_id': self.peer_id,
+        }
+        if self.bind_ip:
+            connect_kwargs['bind_ip'] = self.bind_ip
+        if self.bind_device:
+            connect_kwargs['bind_device'] = self.bind_device
+
+        if self.transport == 'kcp':
+            if self.relay_via:
+                connect_kwargs['relay_via'] = self.relay_via
+            connect_kwargs.update(CONTROL_DEFAULTS)
+        else:
+            connect_kwargs['enable_timestamping'] = bool(enable_timestamping)
+
+        self._session.connect(**connect_kwargs)
+
+    def send(self, *, to: str, data: bytes) -> None:
+        self._session.send(to=to, data=data)
+
+    def recv(self, *, timeout_ms: int = -1):
+        return self._session.recv(timeout_ms=timeout_ms)
+
+    def recv_into(self, *, buffer, timeout_ms: int = -1):
+        return self._session.recv_into(buffer=buffer, timeout_ms=timeout_ms)
+
+    def close(self) -> None:
+        self._session.close()
+
+    def stats(self) -> dict[str, int]:
+        return self._session.stats()
+
+
+__all__ = [
+    'CONTROL_DEFAULTS',
+    'MSG_TYPE_BINARY',
+    'MSG_TYPE_ERROR',
+    'OmniTransport',
+    'Session',
+    'UdpSession',
+]

ros-control-py/udp_teleop_bridge/udp_teleop_bridge/protocol.py

@@ -0,0 +1,74 @@
+"""Shared teleop protocol helpers and transport defaults."""
+
+from __future__ import annotations
+
+import math
+import struct
+from typing import Iterable, Tuple
+
+
+COMMAND_STRUCT = struct.Struct('<6f')
+PACKET_SIZE = COMMAND_STRUCT.size
+
+SUPPORTED_TRANSPORTS = ('udp', 'kcp')
+DEFAULT_TRANSPORT = 'udp'
+
+DEFAULT_OMNI_UDP_SERVER_ADDR = '127.0.0.1:9001'
+DEFAULT_OMNI_KCP_SERVER_ADDR = '127.0.0.1:9002'
+
+DEFAULT_KEYBOARD_PEER_ID = 'ros-keyboard-ctrl'
+DEFAULT_GAMEPAD_PEER_ID = 'ros-gamepad-ctrl'
+DEFAULT_BRIDGE_PEER_ID = 'ros-bridge-ctrl'
+DEFAULT_TARGET_PEER = DEFAULT_BRIDGE_PEER_ID
+
+DEFAULT_FRAME_ID = 'pelvis'
+DEFAULT_INPUT_TOPIC = '/teleop/cmd_vel'
+DEFAULT_OUTPUT_TOPIC = '/hric/robot/cmd_vel'
+DEFAULT_SEND_RATE_HZ = 20.0
+DEFAULT_INPUT_TIMEOUT = 0.75
+DEFAULT_WATCHDOG_TIMEOUT = 0.5
+DEFAULT_PUBLISH_RATE_HZ = 100.0
+DEFAULT_QUEUE_DEPTH = 10
+DEFAULT_EXIT_ZERO_PACKETS = 3
+DEFAULT_RECV_BUFFER_BYTES = 2048
+
+ZERO_COMMAND = (0.0, 0.0, 0.0, 0.0, 0.0, 0.0)
+
+
+def normalize_transport(value: object) -> str:
+    """Return a supported transport name."""
+    transport = str(value).strip().lower()
+    if transport not in SUPPORTED_TRANSPORTS:
+        supported = ', '.join(SUPPORTED_TRANSPORTS)
+        raise ValueError(f"Unsupported transport '{transport}', expected one of: {supported}")
+    return transport
+
+
+def default_server_addr_for_transport(transport: str) -> str:
+    """Return the default OmniSocket server for the chosen transport."""
+    transport = normalize_transport(transport)
+    if transport == 'udp':
+        return DEFAULT_OMNI_UDP_SERVER_ADDR
+    return DEFAULT_OMNI_KCP_SERVER_ADDR
+
+
+def normalize_command(values: Iterable[float]) -> Tuple[float, float, float, float, float, float]:
+    """Return a finite six-float command tuple."""
+    command = tuple(float(value) for value in values)
+    if len(command) != 6:
+        raise ValueError(f'Expected 6 command values, got {len(command)}')
+    if any(not math.isfinite(value) for value in command):
+        raise ValueError('Command contains a non-finite value')
+    return command
+
+
+def pack_command(values: Iterable[float]) -> bytes:
+    """Pack six floats into the wire format."""
+    return COMMAND_STRUCT.pack(*normalize_command(values))
+
+
+def unpack_command(payload: bytes) -> Tuple[float, float, float, float, float, float]:
+    """Decode a control packet into a six-float command tuple."""
+    if len(payload) != PACKET_SIZE:
+        raise ValueError(f'Expected {PACKET_SIZE} bytes, got {len(payload)}')
+    return normalize_command(COMMAND_STRUCT.unpack(payload))

ros-control-py/udp_teleop_bridge/udp_teleop_bridge/topic_status_reader.py

@@ -0,0 +1,122 @@
+"""Subscribe to a ROS 2 topic with runtime type discovery and print messages."""
+
+from __future__ import annotations
+
+import json
+import time
+from typing import Any
+
+import rclpy
+from rclpy.node import Node
+from rosidl_runtime_py.convert import message_to_ordereddict
+from rosidl_runtime_py.utilities import get_message
+
+
+WAIT_LOG_INTERVAL_SEC = 5.0
+
+
+class TopicStatusReader(Node):
+    """Wait for a topic to appear, subscribe to it, and print each message."""
+
+    def __init__(self) -> None:
+        super().__init__('topic_status_reader')
+
+        self.declare_parameter('topic', '/hric/robot/cmd_vel_status')
+        self.declare_parameter('qos_depth', 10)
+        self.declare_parameter('poll_interval_sec', 0.5)
+
+        self._topic = str(self.get_parameter('topic').value).strip()
+        self._qos_depth = int(self.get_parameter('qos_depth').value)
+        self._poll_interval_sec = float(self.get_parameter('poll_interval_sec').value)
+
+        if not self._topic:
+            raise ValueError('topic must not be empty')
+        if self._qos_depth <= 0:
+            raise ValueError('qos_depth must be > 0')
+        if self._poll_interval_sec <= 0.0:
+            raise ValueError('poll_interval_sec must be > 0')
+
+        self._topic_type: str | None = None
+        self._subscription = None
+        self._message_count = 0
+        self._last_wait_log_monotonic = 0.0
+
+        self._poll_timer = self.create_timer(self._poll_interval_sec, self._ensure_subscription)
+        self._ensure_subscription()
+
+    def _discover_topic_types(self) -> list[str]:
+        for topic_name, topic_types in self.get_topic_names_and_types():
+            if topic_name == self._topic:
+                return list(topic_types)
+        return []
+
+    def _log_waiting(self) -> None:
+        now = time.monotonic()
+        if (now - self._last_wait_log_monotonic) < WAIT_LOG_INTERVAL_SEC:
+            return
+        self._last_wait_log_monotonic = now
+        self.get_logger().info(f'Waiting for topic {self._topic} to appear...')
+
+    def _ensure_subscription(self) -> None:
+        if self._subscription is not None:
+            return
+
+        topic_types = self._discover_topic_types()
+        if not topic_types:
+            self._log_waiting()
+            return
+
+        if len(topic_types) > 1:
+            joined = ', '.join(topic_types)
+            self.get_logger().warning(
+                f'Topic {self._topic} reports multiple types ({joined}); using {topic_types[0]}'
+            )
+
+        self._topic_type = topic_types[0]
+        try:
+            message_type = get_message(self._topic_type)
+        except Exception as exc:
+            self.get_logger().error(
+                f'Failed to import message type {self._topic_type} for {self._topic}: {exc}'
+            )
+            return
+
+        self._subscription = self.create_subscription(
+            message_type,
+            self._topic,
+            self._handle_message,
+            self._qos_depth,
+        )
+        self._poll_timer.cancel()
+        self.get_logger().info(
+            f'Subscribed to {self._topic} with type {self._topic_type} (qos_depth={self._qos_depth})'
+        )
+
+    def _format_message(self, msg: Any) -> str:
+        try:
+            payload = message_to_ordereddict(msg)
+        except Exception:
+            return str(msg)
+        return json.dumps(payload, ensure_ascii=False, indent=2)
+
+    def _handle_message(self, msg: Any) -> None:
+        self._message_count += 1
+        received_at = time.strftime('%Y-%m-%d %H:%M:%S')
+        topic_type = self._topic_type or type(msg).__name__
+        rendered = self._format_message(msg)
+        print(
+            f'[{received_at}] #{self._message_count} {self._topic} ({topic_type})\n{rendered}\n',
+            flush=True,
+        )
+
+
+def main(args: list[str] | None = None) -> None:
+    rclpy.init(args=args)
+    node = TopicStatusReader()
+    try:
+        rclpy.spin(node)
+    except KeyboardInterrupt:
+        pass
+    finally:
+        node.destroy_node()
+        rclpy.shutdown()

ros-control-py/udp_teleop_bridge/udp_teleop_bridge/udp_cmd_vel_receiver.py

@@ -0,0 +1,480 @@
+"""ROS 2 node that receives OmniSocket teleop packets and republishes TwistStamped."""
+
+from __future__ import annotations
+
+import json
+import os
+import socket
+import threading
+import time
+from typing import Dict, Optional, Tuple
+
+import rclpy
+from geometry_msgs.msg import TwistStamped
+from rclpy.node import Node
+
+from .protocol import (
+    DEFAULT_BRIDGE_PEER_ID,
+    DEFAULT_FRAME_ID,
+    DEFAULT_OUTPUT_TOPIC,
+    DEFAULT_PUBLISH_RATE_HZ,
+    DEFAULT_QUEUE_DEPTH,
+    DEFAULT_RECV_BUFFER_BYTES,
+    DEFAULT_TRANSPORT,
+    DEFAULT_WATCHDOG_TIMEOUT,
+    PACKET_SIZE,
+    ZERO_COMMAND,
+    unpack_command,
+)
+
+
+CommandTuple = Tuple[float, float, float, float, float, float]
+
+
+class UdpCmdVelReceiver(Node):
+    """Publish TwistStamped commands from the OmniSocket control wire format."""
+
+    def __init__(self) -> None:
+        super().__init__('udp_cmd_vel_receiver')
+
+        self.declare_parameter('transport', DEFAULT_TRANSPORT)
+        self.declare_parameter('server_addr', '')
+        self.declare_parameter('relay_via', '')
+        self.declare_parameter('peer_id', DEFAULT_BRIDGE_PEER_ID)
+        self.declare_parameter('expected_sender', '')
+        self.declare_parameter('local_socket_path', '/tmp/omnisocket-b-side-cmd.sock')
+        self.declare_parameter('output_topic', DEFAULT_OUTPUT_TOPIC)
+        self.declare_parameter('frame_id', DEFAULT_FRAME_ID)
+        self.declare_parameter('watchdog_timeout', DEFAULT_WATCHDOG_TIMEOUT)
+        self.declare_parameter('publish_rate_hz', DEFAULT_PUBLISH_RATE_HZ)
+        self.declare_parameter('queue_depth', DEFAULT_QUEUE_DEPTH)
+
+        self._transport_name = str(self.get_parameter('transport').value)
+        self._server_addr = str(self.get_parameter('server_addr').value)
+        self._relay_via = str(self.get_parameter('relay_via').value)
+        self._peer_id = str(self.get_parameter('peer_id').value)
+        self._expected_sender = str(self.get_parameter('expected_sender').value).strip()
+        self._local_socket_path = str(self.get_parameter('local_socket_path').value).strip()
+        self._output_topic = str(self.get_parameter('output_topic').value)
+        self._frame_id = str(self.get_parameter('frame_id').value)
+        self._watchdog_timeout = float(self.get_parameter('watchdog_timeout').value)
+        self._publish_rate_hz = float(self.get_parameter('publish_rate_hz').value)
+        self._queue_depth = int(self.get_parameter('queue_depth').value)
+
+        if self._transport_name not in ('udp', 'kcp', 'unix_dgram'):
+            raise ValueError("transport must be one of: udp, kcp, unix_dgram")
+        if self._watchdog_timeout <= 0.0:
+            raise ValueError('watchdog_timeout must be > 0')
+        if self._publish_rate_hz <= 0.0:
+            raise ValueError('publish_rate_hz must be > 0')
+        if self._queue_depth <= 0:
+            raise ValueError('queue_depth must be > 0')
+
+        self._publisher = self.create_publisher(TwistStamped, self._output_topic, self._queue_depth)
+        self._transport = None
+        self._unix_socket: socket.socket | None = None
+        self._msg_type_binary = 0
+        self._msg_type_error = 0
+        if self._transport_name == 'unix_dgram':
+            self._setup_unix_socket()
+        else:
+            from .omni_transport import MSG_TYPE_BINARY, MSG_TYPE_ERROR, OmniTransport
+
+            self._msg_type_binary = MSG_TYPE_BINARY
+            self._msg_type_error = MSG_TYPE_ERROR
+            self._transport = self._create_transport()
+
+        self._lock = threading.Lock()
+        self._last_log_times: Dict[str, float] = {}
+        self._latest_command: CommandTuple = ZERO_COMMAND
+        self._last_packet_monotonic: Optional[float] = None
+        self._last_published_command: CommandTuple = ZERO_COMMAND
+        self._closing = threading.Event()
+        self._recv_buffer = bytearray(DEFAULT_RECV_BUFFER_BYTES)
+        self._runtime_dir = os.getenv('BLITZ_RUNTIME_DIR', '/run/blitz-robot').strip() or '/run/blitz-robot'
+        self._status_path = os.path.join(self._runtime_dir, 'ros-receiver.status.json')
+        self._transport_reconnect_count = 0
+        self._recv_thread_heartbeat_epoch_ms = self._now_epoch_ms()
+        self._runtime_last_error = ''
+
+        self.create_timer(1.0 / self._publish_rate_hz, self._publish_tick)
+        self.create_timer(1.0, self._write_status_tick)
+
+        recv_target = self._recv_loop_unix_dgram if self._transport_name == 'unix_dgram' else self._recv_loop
+        self._recv_thread = threading.Thread(target=recv_target, daemon=True)
+        self._recv_thread.start()
+
+        if self._transport_name == 'unix_dgram':
+            self.get_logger().info(
+                'Receiving teleop commands via unix_dgram://%s and publishing TwistStamped to %s '
+                'at %.1f Hz (frame_id=%s, watchdog %.2f s)'
+                % (
+                    self._local_socket_path,
+                    self._output_topic,
+                    self._publish_rate_hz,
+                    self._frame_id,
+                    self._watchdog_timeout,
+                )
+            )
+        else:
+            assert self._transport is not None
+            self.get_logger().info(
+                'Receiving teleop commands via %s://%s as %s and publishing TwistStamped to %s '
+                'at %.1f Hz (frame_id=%s, watchdog %.2f s)'
+                % (
+                    self._transport.transport,
+                    self._transport.server_addr,
+                    self._peer_id,
+                    self._output_topic,
+                    self._publish_rate_hz,
+                    self._frame_id,
+                    self._watchdog_timeout,
+                )
+            )
+
+    def _setup_unix_socket(self) -> None:
+        if not self._local_socket_path:
+            raise ValueError('local_socket_path must not be empty for unix_dgram transport')
+
+        socket_dir = os.path.dirname(self._local_socket_path)
+        if socket_dir:
+            os.makedirs(socket_dir, exist_ok=True)
+        if os.path.exists(self._local_socket_path):
+            self.get_logger().warning(
+                'Removing existing unix datagram socket path before bind: %s'
+                % self._local_socket_path
+            )
+        try:
+            os.unlink(self._local_socket_path)
+        except FileNotFoundError:
+            pass
+
+        self._unix_socket = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
+        self._unix_socket.bind(self._local_socket_path)
+        self._unix_socket.settimeout(0.1)
+
+    def _close_unix_socket(self) -> None:
+        if self._unix_socket is not None:
+            try:
+                self._unix_socket.close()
+            except OSError:
+                pass
+            self._unix_socket = None
+
+    def _create_transport(self):
+        from .omni_transport import OmniTransport
+
+        return OmniTransport(
+            transport=self._transport_name,
+            server_addr=self._server_addr,
+            relay_via=self._relay_via,
+            peer_id=self._peer_id,
+        )
+
+    def _reconnect_transport(self) -> bool:
+        while not self._closing.is_set() and rclpy.ok():
+            current_transport = self._transport
+            if current_transport is not None:
+                try:
+                    current_transport.close()
+                except OSError:
+                    pass
+            try:
+                self._transport = self._create_transport()
+                self._transport_reconnect_count += 1
+                self._set_runtime_last_error('')
+                if self._should_log('transport_reconnected', 1.0):
+                    self.get_logger().info(
+                        'Reconnected OmniSocket transport %s://%s as %s'
+                        % (self._transport_name, self._server_addr, self._peer_id)
+                    )
+                return True
+            except OSError as exc:
+                self._transport = None
+                self._set_runtime_last_error(str(exc))
+                if self._should_log('transport_reconnect_error', 2.0):
+                    self.get_logger().error(f'Failed to reconnect OmniSocket transport: {exc}')
+                time.sleep(0.5)
+        return False
+
+    def _rebind_unix_socket(self) -> bool:
+        while not self._closing.is_set() and rclpy.ok():
+            self._close_unix_socket()
+            try:
+                self._setup_unix_socket()
+                self._transport_reconnect_count += 1
+                self._set_runtime_last_error('')
+                if self._should_log('unix_rebound', 1.0):
+                    self.get_logger().info(f'Rebound unix datagram socket at {self._local_socket_path}')
+                return True
+            except OSError as exc:
+                self._set_runtime_last_error(str(exc))
+                if self._should_log('unix_rebind_error', 2.0):
+                    self.get_logger().error(f'Failed to rebind unix datagram socket: {exc}')
+                time.sleep(0.5)
+        return False
+
+    def _should_log(self, key: str, throttle_sec: float) -> bool:
+        now = time.monotonic()
+        previous = self._last_log_times.get(key)
+        if previous is None or (now - previous) >= throttle_sec:
+            self._last_log_times[key] = now
+            return True
+        return False
+
+    def _now_epoch_ms(self) -> int:
+        return time.time_ns() // 1_000_000
+
+    def _update_recv_heartbeat(self) -> None:
+        with self._lock:
+            self._recv_thread_heartbeat_epoch_ms = self._now_epoch_ms()
+
+    def _last_packet_age_ms(self) -> int | None:
+        with self._lock:
+            last_packet_monotonic = self._last_packet_monotonic
+        if last_packet_monotonic is None:
+            return None
+        return max(0, int((time.monotonic() - last_packet_monotonic) * 1000.0))
+
+    def _socket_bound(self) -> bool:
+        if self._transport_name == 'unix_dgram':
+            return self._unix_socket is not None and os.path.exists(self._local_socket_path)
+        return self._transport is not None
+
+    def _set_runtime_last_error(self, message: str) -> None:
+        self._runtime_last_error = message
+
+    def _status_payload(self) -> dict[str, object]:
+        with self._lock:
+            recv_thread_heartbeat_epoch_ms = self._recv_thread_heartbeat_epoch_ms
+        return {
+            'updated_at_epoch_ms': self._now_epoch_ms(),
+            'pid': os.getpid(),
+            'recv_thread_heartbeat_epoch_ms': recv_thread_heartbeat_epoch_ms,
+            'transport': self._transport_name,
+            'local_socket_path': self._local_socket_path,
+            'socket_bound': self._socket_bound(),
+            'transport_reconnect_count': self._transport_reconnect_count,
+            'last_packet_age_ms': self._last_packet_age_ms(),
+            'last_error': self._runtime_last_error,
+        }
+
+    def _write_status_tick(self) -> None:
+        payload = self._status_payload()
+        if self._transport_name == 'unix_dgram':
+            if self._unix_socket is None:
+                payload['last_error'] = self._runtime_last_error or 'unix datagram socket is not bound'
+        else:
+            if self._transport is None:
+                payload['last_error'] = self._runtime_last_error or 'OmniSocket transport is not connected'
+        try:
+            os.makedirs(self._runtime_dir, exist_ok=True)
+            temp_path = f'{self._status_path}.tmp.{os.getpid()}'
+            with open(temp_path, 'w', encoding='utf-8') as handle:
+                json.dump(payload, handle, ensure_ascii=True, separators=(',', ':'))
+            os.replace(temp_path, self._status_path)
+        except OSError as exc:
+            if self._should_log('status_write_error', 5.0):
+                self.get_logger().warning(f'Failed to write receiver status file: {exc}')
+
+    def _publish_command(self, command: CommandTuple) -> None:
+        msg = TwistStamped()
+        msg.header.stamp = self.get_clock().now().to_msg()
+        msg.header.frame_id = self._frame_id
+        msg.twist.linear.x = command[0]
+        msg.twist.linear.y = command[1]
+        msg.twist.linear.z = command[2]
+        msg.twist.angular.x = command[3]
+        msg.twist.angular.y = command[4]
+        msg.twist.angular.z = command[5]
+        self._publisher.publish(msg)
+        self._last_published_command = command
+
+    def _handle_error_message(self, from_peer: str, body_len: int) -> None:
+        if self._should_log('server_error', 1.0):
+            text = bytes(self._recv_buffer[:body_len]).decode('utf-8', errors='replace')
+            self.get_logger().error(f'OmniSocket server error from {from_peer}: {text}')
+
+    def _recv_loop(self) -> None:
+        while not self._closing.is_set() and rclpy.ok():
+            self._update_recv_heartbeat()
+            try:
+                assert self._transport is not None
+                meta = self._transport.recv_into(buffer=self._recv_buffer, timeout_ms=100)
+            except BufferError as exc:
+                self._set_runtime_last_error(str(exc))
+                if self._should_log('buffer_error', 2.0):
+                    self.get_logger().warning(f'Dropped oversized OmniSocket frame: {exc}')
+                continue
+            except OSError as exc:
+                self._set_runtime_last_error(str(exc))
+                if not self._closing.is_set() and self._should_log('recv_error', 2.0):
+                    self.get_logger().error(f'OmniSocket receive loop stopped: {exc}')
+                if not self._reconnect_transport():
+                    return
+                continue
+
+            self._update_recv_heartbeat()
+            if meta is None:
+                continue
+            self._set_runtime_last_error('')
+
+            from_peer = str(meta['from'])
+            msg_type = int(meta['msg_type'])
+            body_len = int(meta['body_len'])
+
+            if msg_type == self._msg_type_error:
+                self._set_runtime_last_error(f'server error message from {from_peer}')
+                self._handle_error_message(from_peer, body_len)
+                continue
+
+            if self._expected_sender and from_peer != self._expected_sender:
+                self._set_runtime_last_error(f'unexpected sender {from_peer}')
+                if self._should_log('unexpected_sender', 2.0):
+                    self.get_logger().warning(
+                        'Ignoring message from unexpected sender %s (expected %s)'
+                        % (from_peer, self._expected_sender)
+                    )
+                continue
+
+            if msg_type != self._msg_type_binary:
+                self._set_runtime_last_error(f'unexpected message type {msg_type}')
+                if self._should_log('unexpected_type', 2.0):
+                    self.get_logger().warning(
+                        'Ignoring unexpected message type %d from %s (%d bytes)'
+                        % (msg_type, from_peer, body_len)
+                    )
+                continue
+
+            if body_len != PACKET_SIZE:
+                self._set_runtime_last_error(f'invalid payload size {body_len}')
+                if self._should_log('packet_size', 2.0):
+                    self.get_logger().warning(
+                        'Dropped binary payload from %s with invalid size %d (expected %d)'
+                        % (from_peer, body_len, PACKET_SIZE)
+                    )
+                continue
+
+            try:
+                command = unpack_command(self._recv_buffer[:PACKET_SIZE])
+            except ValueError as exc:
+                self._set_runtime_last_error(str(exc))
+                if self._should_log('decode_error', 2.0):
+                    self.get_logger().warning(f'Dropped malformed command payload: {exc}')
+                continue
+
+            with self._lock:
+                self._latest_command = command
+                self._last_packet_monotonic = time.monotonic()
+            self._set_runtime_last_error('')
+
+    def _recv_loop_unix_dgram(self) -> None:
+        assert self._unix_socket is not None
+
+        while not self._closing.is_set() and rclpy.ok():
+            self._update_recv_heartbeat()
+            try:
+                payload = self._unix_socket.recv(DEFAULT_RECV_BUFFER_BYTES)
+            except socket.timeout:
+                if not os.path.exists(self._local_socket_path):
+                    self._set_runtime_last_error('unix datagram socket path disappeared')
+                    if self._should_log('unix_socket_missing', 2.0):
+                        self.get_logger().warning(
+                            f'Unix datagram socket path disappeared, rebinding {self._local_socket_path}'
+                        )
+                    if not self._rebind_unix_socket():
+                        return
+                continue
+            except OSError as exc:
+                self._set_runtime_last_error(str(exc))
+                if not self._closing.is_set() and self._should_log('unix_recv_error', 2.0):
+                    self.get_logger().error(f'Unix datagram receive loop stopped: {exc}')
+                if not self._rebind_unix_socket():
+                    return
+                continue
+
+            self._update_recv_heartbeat()
+            if len(payload) != PACKET_SIZE:
+                self._set_runtime_last_error(f'invalid unix datagram payload size {len(payload)}')
+                if self._should_log('unix_packet_size', 2.0):
+                    self.get_logger().warning(
+                        'Dropped unix datagram payload with invalid size %d (expected %d)'
+                        % (len(payload), PACKET_SIZE)
+                    )
+                continue
+
+            try:
+                command = unpack_command(payload)
+            except ValueError as exc:
+                self._set_runtime_last_error(str(exc))
+                if self._should_log('unix_decode_error', 2.0):
+                    self.get_logger().warning(f'Dropped malformed unix datagram payload: {exc}')
+                continue
+
+            with self._lock:
+                self._latest_command = command
+                self._last_packet_monotonic = time.monotonic()
+            self._set_runtime_last_error('')
+
+    def _command_for_publish_tick(self) -> tuple[CommandTuple, Optional[float], bool]:
+        with self._lock:
+            latest_command = self._latest_command
+            last_packet_monotonic = self._last_packet_monotonic
+
+        if last_packet_monotonic is None:
+            return ZERO_COMMAND, None, False
+
+        age = time.monotonic() - last_packet_monotonic
+        if age > self._watchdog_timeout:
+            return ZERO_COMMAND, age, True
+        return latest_command, age, False
+
+    def _publish_tick(self) -> None:
+        publish_command, age, timed_out = self._command_for_publish_tick()
+
+        if timed_out and self._last_published_command != ZERO_COMMAND:
+            if self._should_log('watchdog_stop', 2.0):
+                self.get_logger().warning(
+                    'Command stream timed out after %.2f s, publishing zero velocity stop'
+                    % age
+                )
+
+        self._publish_command(publish_command)
+
+    def close(self) -> None:
+        self._closing.set()
+        if hasattr(self, '_transport') and self._transport is not None:
+            try:
+                self._transport.close()
+            except OSError as exc:
+                if self._should_log('close_error', 2.0):
+                    self.get_logger().warning(f'Closing OmniSocket transport failed: {exc}')
+            self._transport = None
+        if self._unix_socket is not None:
+            try:
+                self._close_unix_socket()
+            except OSError as exc:
+                if self._should_log('unix_close_error', 2.0):
+                    self.get_logger().warning(f'Closing unix socket failed: {exc}')
+            try:
+                os.unlink(self._local_socket_path)
+            except FileNotFoundError:
+                pass
+        if hasattr(self, '_recv_thread') and self._recv_thread.is_alive():
+            self._recv_thread.join(timeout=0.5)
+
+    def destroy_node(self) -> bool:
+        self.close()
+        return super().destroy_node()
+
+
+def main(args: Optional[list[str]] = None) -> None:
+    rclpy.init(args=args)
+    node = UdpCmdVelReceiver()
+    try:
+        rclpy.spin(node)
+    except KeyboardInterrupt:
+        pass
+    finally:
+        node.destroy_node()
+        rclpy.shutdown()

scripts/BACDauto_test.sh

@@ -56,6 +56,7 @@ if [ ! -x ./bin/kcpserver ]; then
   exit 1
 fi
 setsid ./bin/kcpserver -listen 0.0.0.0:10909 \
+  -telemetry-peer peer-a-telemetry \
   -kcp-ts-debug-log logs/d-kcp-ts.jsonl \
   -kcp-session-stats-log logs/d-kcp-stats.jsonl > server_console.log 2>&1 </dev/null &
 echo "server D launched (pid=$!)"
@@ -193,9 +194,9 @@ done
 
 # 50 轮发送
 for i in $(seq 1 50); do
-  echo "file peer-a /tmp/test30k.bin" >&3
+  echo "file peer-a /home/boll/test30.bin" >&3
   sleep 1
-  echo "file peer-a /tmp/test5.bin" >&3
+  echo "file peer-a /home/boll/test5.bin" >&3
   sleep 1
 done
 

scripts/BDAanto_test.sh

@@ -56,6 +56,7 @@ if [ ! -x ./bin/kcpserver ]; then
   exit 1
 fi
 setsid ./bin/kcpserver -listen 0.0.0.0:10909 \
+  -telemetry-peer peer-a-telemetry \
   -kcp-ts-debug-log logs/d-kcp-ts.jsonl \
   -kcp-session-stats-log logs/d-kcp-stats.jsonl > server_console.log 2>&1 </dev/null &
 echo "server D launched (pid=$!)"
@@ -155,9 +156,9 @@ done
 
 # 50 轮发送
 for i in $(seq 1 50); do
-  echo "file peer-a /tmp/test30k.bin" >&3
+  echo "file peer-a /home/boll/test30.bin" >&3
   sleep 1
-  echo "file peer-a /tmp/test5.bin" >&3
+  echo "file peer-a /home/boll/test5.bin" >&3
   sleep 1
 done
 

scripts/boot/5g-dial.sh

@@ -0,0 +1,180 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+STEP="5g-dial"
+
+append_route_targets() {
+  local raw_list="$1"
+  local target
+
+  if [[ -z "${raw_list}" ]]; then
+    return 0
+  fi
+
+  for target in ${raw_list//,/ }; do
+    if [[ -z "${target}" ]]; then
+      continue
+    fi
+    dial_cmd+=(--route-target "${target}")
+  done
+}
+
+read_detected_interface() {
+  local info_json="$1"
+
+  if [[ ! -f "${info_json}" ]]; then
+    return 1
+  fi
+
+  python3 -c 'import json, sys; print((json.load(open(sys.argv[1], encoding="utf-8")).get("interface") or "").strip())' "${info_json}"
+}
+
+disable_interfaces() {
+  local raw_list="$1"
+  local iface
+  local nmcli_available=0
+
+  if [[ -z "${raw_list}" ]]; then
+    return 0
+  fi
+  if command -v nmcli >/dev/null 2>&1; then
+    nmcli_available=1
+  fi
+
+  for iface in ${raw_list//,/ }; do
+    if [[ -z "${iface}" ]]; then
+      continue
+    fi
+    blitz_log "${STEP}" "disable-interface" "start" "iface=${iface}" 0
+    if [[ "${nmcli_available}" -eq 1 ]]; then
+      nmcli device disconnect "${iface}" >/dev/null 2>&1 || true
+    fi
+    if ip link show dev "${iface}" >/dev/null 2>&1; then
+      if ip link set dev "${iface}" down; then
+        blitz_log "${STEP}" "disable-interface" "success" "iface=${iface}" 0
+      else
+        rc=$?
+        blitz_log "${STEP}" "disable-interface" "failure" "iface=${iface}" "${rc}"
+        return "${rc}"
+      fi
+    else
+      blitz_log "${STEP}" "disable-interface" "success" "iface=${iface} not present, skipping" 0
+    fi
+  done
+}
+
+wait_for_serial() {
+  local serial_port="$1"
+  local timeout_sec="$2"
+  local waited=0
+
+  while (( waited < timeout_sec )); do
+    if [[ -e "${serial_port}" ]]; then
+      blitz_log "${STEP}" "wait-serial" "success" "serial_port=${serial_port} waited_sec=${waited}" 0
+      return 0
+    fi
+    if (( waited == 0 || waited % 5 == 0 )); then
+      blitz_log "${STEP}" "wait-serial" "waiting" "serial_port=${serial_port} waited_sec=${waited}" 0
+    fi
+    sleep 1
+    waited=$(( waited + 1 ))
+  done
+
+  blitz_log "${STEP}" "wait-serial" "failure" "serial_port=${serial_port} timeout_sec=${timeout_sec}" 1
+  return 1
+}
+
+wait_for_route() {
+  local target_ip="$1"
+  local timeout_sec="$2"
+  local expected_interface="${3:-}"
+  local waited=0
+  local route_output
+
+  while (( waited < timeout_sec )); do
+    route_output="$(blitz_route_ready "${target_ip}" "${expected_interface}" || true)"
+    if [[ -n "${route_output}" ]]; then
+      blitz_log "${STEP}" "route-check" "success" "target_ip=${target_ip} interface=${expected_interface:-auto} route=${route_output}" 0
+      return 0
+    fi
+    if (( waited == 0 || waited % 5 == 0 )); then
+      blitz_log "${STEP}" "route-check" "waiting" "target_ip=${target_ip} interface=${expected_interface:-auto} waited_sec=${waited}" 0
+    fi
+    sleep 1
+    waited=$(( waited + 1 ))
+  done
+
+  blitz_log "${STEP}" "route-check" "failure" "target_ip=${target_ip} interface=${expected_interface:-auto} timeout_sec=${timeout_sec}" 1
+  return 1
+}
+
+blitz_load_boot_env
+blitz_require_root "${STEP}"
+blitz_require_command ip "${STEP}"
+blitz_require_command python3 "${STEP}"
+blitz_require_file "${BLITZ_5G_DIAL_DIR}/rndis_dial.py" "${STEP}"
+
+if [[ -z "${BLITZ_TIME_SERVER_IP}" ]]; then
+  blitz_log "${STEP}" "precheck" "failure" "BLITZ_TIME_SERVER_IP is empty and no fallback could be derived" 1
+  exit 1
+fi
+
+disable_interfaces "${BLITZ_5G_DISABLE_INTERFACES:-}"
+
+if [[ -n "${BLITZ_5G_INTERFACE:-}" ]]; then
+  route_output="$(blitz_route_ready "${BLITZ_TIME_SERVER_IP}" "${BLITZ_5G_INTERFACE}" || true)"
+  if [[ -n "${route_output}" ]]; then
+    blitz_log "${STEP}" "dial" "already_up" "target_ip=${BLITZ_TIME_SERVER_IP} interface=${BLITZ_5G_INTERFACE} route=${route_output}" 0
+    exit 0
+  fi
+else
+  blitz_log "${STEP}" "route-check" "info" "BLITZ_5G_INTERFACE is empty, skipping pre-dial route shortcut and using auto-detect mode" 0
+fi
+
+wait_for_serial "${BLITZ_5G_SERIAL_PORT}" "${BLITZ_5G_SERIAL_WAIT_SEC}"
+
+dial_cmd=(
+  python3
+  rndis_dial.py
+  --serial-port "${BLITZ_5G_SERIAL_PORT}"
+  --modem-subnet "${BLITZ_5G_MODEM_SUBNET}"
+)
+if [[ -n "${BLITZ_5G_INTERFACE:-}" ]]; then
+  dial_cmd+=(--interface "${BLITZ_5G_INTERFACE}")
+fi
+case "${BLITZ_5G_SKIP_DHCP:-0}" in
+  1|true|TRUE|yes|YES)
+    dial_cmd+=(--skip-dhcp)
+    ;;
+esac
+case "${BLITZ_5G_REMOVE_DEFAULT_ROUTE:-1}" in
+  1|true|TRUE|yes|YES)
+    dial_cmd+=(--remove-default-route --gateway "${BLITZ_5G_GATEWAY}" --route-target "${BLITZ_TIME_SERVER_IP}")
+    append_route_targets "${BLITZ_5G_ROUTE_TARGETS:-}"
+    ;;
+esac
+
+pushd "${BLITZ_5G_DIAL_DIR}" >/dev/null
+blitz_run "${STEP}" "dial" "${dial_cmd[@]}"
+popd >/dev/null
+
+resolved_interface="${BLITZ_5G_INTERFACE:-}"
+if [[ -z "${resolved_interface}" ]]; then
+  resolved_interface="$(read_detected_interface "${BLITZ_5G_INFO_JSON}" || true)"
+  if [[ -n "${resolved_interface}" ]]; then
+    blitz_log "${STEP}" "resolve-interface" "success" "resolved interface from ${BLITZ_5G_INFO_JSON}: ${resolved_interface}" 0
+  else
+    blitz_log "${STEP}" "resolve-interface" "failure" "failed to read detected interface from ${BLITZ_5G_INFO_JSON}" 1
+  fi
+fi
+
+if [[ -n "${resolved_interface}" ]]; then
+  wait_for_route "${BLITZ_TIME_SERVER_IP}" "${BLITZ_5G_ROUTE_WAIT_SEC}" "${resolved_interface}"
+  blitz_log "${STEP}" "complete" "success" "5G dial completed and route is ready on ${resolved_interface}" 0
+else
+  blitz_log "${STEP}" "complete" "success" "5G dial completed but route wait was skipped because no interface could be resolved; refer to rndis_dial.py logs" 0
+fi

scripts/boot/README.md

@@ -0,0 +1,210 @@
+# Robot B-Side Boot Chain
+
+This directory contains the robot-side boot and recovery scripts.
+
+Normal usage is:
+
+```bash
+sudo bash scripts/boot/install-systemd.sh
+sudo systemctl start blitz-robot.target
+```
+
+After installation, `blitz-robot.target` is enabled and will start automatically on reboot.
+
+To stop the chain now and disable boot-time autostart for future reboots:
+
+```bash
+sudo bash scripts/boot/disable-systemd.sh
+```
+
+## Current Startup Order
+
+The current cold-start chain is:
+
+1. `blitz-boot-gate.service`
+2. `blitz-5g-dial.service`
+3. `blitz-ros-receiver.service`
+4. `blitz-b-side-omnid.service`
+5. `blitz-watchdog.service`
+
+There is no longer any automatic time-sync step in the boot chain.
+
+## What Each Script Does
+
+- `robot-boot.env`: default boot configuration
+- `robot-boot.env.local`: machine-local overrides
+- `common.sh`: shared env loading, logging, and helper functions
+- `boot-gate.sh`: fixed startup delay gate
+- `5g-dial.sh`: brings up the 5G modem path and verifies routing
+- `start-ros-receiver-service.sh`: boot wrapper for ROS receiver
+- `wait-for-unix-socket.sh`: waits for the ROS receiver unix socket
+- `start-b-side-omnid-service.sh`: boot wrapper for `b_side_omnid`
+- `blitz-watchdog.sh`: runtime health watchdog and recovery orchestrator
+- `blitz-fault-inject.sh`: fault injection entrypoint
+- `install-systemd.sh`: installs systemd units into `/etc/systemd/system`
+- `disable-systemd.sh`: stops the boot chain and disables autostart
+
+## Important Configuration
+
+Most machine-specific overrides should go into:
+
+```text
+scripts/boot/robot-boot.env.local
+```
+
+Typical settings:
+
+```bash
+BLITZ_BOOT_DELAY_SEC="30"
+BLITZ_LOG_FILE="/var/log/blitz-robot/startup.log"
+BLITZ_RUNTIME_DIR="/run/blitz-robot"
+
+BLITZ_5G_DIAL_DIR="${OMNISOCKETGO_ROOT}/scripts/boot"
+BLITZ_5G_SERIAL_PORT="/dev/ttyUSB2"
+BLITZ_5G_INTERFACE=""
+BLITZ_5G_MODEM_SUBNET="192.168.224.0/22"
+BLITZ_5G_GATEWAY="192.168.225.1"
+BLITZ_5G_REMOVE_DEFAULT_ROUTE="1"
+BLITZ_5G_ROUTE_TARGETS="106.55.173.235"
+BLITZ_5G_INFO_JSON="${OMNISOCKETGO_ROOT}/scripts/boot/modem_network_info.json"
+
+BLITZ_TIME_SERVER_IP="81.70.156.140"
+
+BLITZ_ROS_USER="nvidia"
+BLITZ_ROS_SOCKET_WAIT_SEC="20"
+BLITZ_WATCHDOG_INTERVAL_SEC="5"
+BLITZ_HEALTH_STALE_SEC="15"
+BLITZ_OMNID_THREAD_HEARTBEAT_TIMEOUT_SEC="15"
+BLITZ_NETWORK_FAIL_THRESHOLD="3"
+BLITZ_NETWORK_RECOVERY_COOLDOWN_SEC="30"
+BLITZ_WATCHDOG_ALLOW_FAULT_INJECTION="0"
+```
+
+`BLITZ_TIME_SERVER_IP` is still used, but only as the 5G route/ping health-check target. It is no longer used for automatic clock synchronization.
+
+If `BLITZ_TIME_SERVER_IP` is left empty, the scripts fall back to the host part of `ROBOT_SIDE_OMNISOCKET_SERVER_ADDR`.
+
+## Install Or Upgrade
+
+Run:
+
+```bash
+sudo bash scripts/boot/install-systemd.sh
+sudo systemctl daemon-reload
+sudo systemctl restart blitz-robot.target
+```
+
+`install-systemd.sh` will also remove any old `blitz-time-sync.service` unit left over from earlier versions.
+
+## Disable Autostart
+
+To stop the currently running services and disable autostart for future reboots:
+
+```bash
+sudo bash scripts/boot/disable-systemd.sh
+```
+
+To re-enable later:
+
+```bash
+sudo bash scripts/boot/install-systemd.sh
+sudo systemctl start blitz-robot.target
+```
+
+## Logs
+
+All boot-chain and watchdog logs are appended to:
+
+```text
+/var/log/blitz-robot/startup.log
+```
+
+Follow the log live:
+
+```bash
+sudo tail -f /var/log/blitz-robot/startup.log
+```
+
+Check service state:
+
+```bash
+sudo systemctl status blitz-robot.target
+sudo systemctl status blitz-5g-dial.service
+sudo systemctl status blitz-ros-receiver.service
+sudo systemctl status blitz-b-side-omnid.service
+sudo systemctl status blitz-watchdog.service
+```
+
+Check systemd journal:
+
+```bash
+sudo journalctl -u blitz-robot.target -u blitz-5g-dial.service \
+  -u blitz-ros-receiver.service -u blitz-b-side-omnid.service \
+  -u blitz-watchdog.service -f
+```
+
+## Runtime Status Files
+
+The runtime status directory is:
+
+```text
+/run/blitz-robot
+```
+
+Key files:
+
+- `b-side-omnid.status.json`
+- `ros-receiver.status.json`
+- `watchdog.status.json`
+
+Pretty-print them:
+
+```bash
+sudo python3 -m json.tool /run/blitz-robot/watchdog.status.json
+sudo python3 -m json.tool /run/blitz-robot/b-side-omnid.status.json
+sudo python3 -m json.tool /run/blitz-robot/ros-receiver.status.json
+```
+
+## Fault Injection
+
+Available test commands:
+
+```bash
+sudo bash scripts/boot/blitz-fault-inject.sh bside-crash
+sudo bash scripts/boot/blitz-fault-inject.sh bside-process-freeze
+sudo bash scripts/boot/blitz-fault-inject.sh bside-video-thread-stall
+sudo bash scripts/boot/blitz-fault-inject.sh bside-control-thread-stall
+sudo bash scripts/boot/blitz-fault-inject.sh ros-crash
+sudo bash scripts/boot/blitz-fault-inject.sh ros-freeze
+```
+
+For synthetic network fault injection, first enable it in `robot-boot.env.local`:
+
+```bash
+BLITZ_WATCHDOG_ALLOW_FAULT_INJECTION="1"
+```
+
+Then restart watchdog and inject:
+
+```bash
+sudo systemctl restart blitz-watchdog.service
+sudo bash scripts/boot/blitz-fault-inject.sh network-down on
+sudo bash scripts/boot/blitz-fault-inject.sh network-down off
+```
+
+## Recovery Behavior Summary
+
+- If `b_side_omnid` dies or its status file goes stale, watchdog first tries a targeted `b_side` restart.
+- If ROS receiver dies, loses its socket, or its heartbeat goes stale, watchdog performs an ordered full restart:
+  - stop `b_side`
+  - restart ROS receiver
+  - wait for unix socket
+  - start `b_side`
+- If network checks fail repeatedly, watchdog stops `b_side`, runs `5g-dial.sh`, waits for route recovery, and then restores services.
+- Camera disappearance is logged as degraded state. Reappearance triggers a `b_side` restart after the device is stable.
+
+## Notes
+
+- `time-sync.sh` and `blitz-time-sync.service` are intentionally removed from the automatic boot path.
+- `b_side_omnid` must already be built before boot-time startup.
+- `bin/b_side_omnid` missing, ROS env missing, or modem script missing will all show up in `startup.log`.

scripts/boot/blitz-fault-inject.sh

@@ -0,0 +1,97 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+STEP="fault-inject"
+B_SIDE_SERVICE="blitz-b-side-omnid.service"
+ROS_SERVICE="blitz-ros-receiver.service"
+
+main_pid_for_service() {
+  local service_name="$1"
+  systemctl show --property MainPID --value "${service_name}"
+}
+
+require_running_pid() {
+  local service_name="$1"
+  local pid
+
+  pid="$(main_pid_for_service "${service_name}")"
+  if [[ -z "${pid}" || "${pid}" == "0" ]]; then
+    blitz_log "${STEP}" "lookup-pid" "failure" "service=${service_name}" 1
+    exit 1
+  fi
+  printf '%s\n' "${pid}"
+}
+
+write_fault_flag() {
+  local flag_name="$1"
+  local flag_path="${BLITZ_RUNTIME_DIR}/${flag_name}"
+  printf '%s\n' "$(date +%s)" > "${flag_path}"
+  blitz_log "${STEP}" "flag-on" "success" "path=${flag_path}" 0
+}
+
+clear_fault_flag() {
+  local flag_name="$1"
+  local flag_path="${BLITZ_RUNTIME_DIR}/${flag_name}"
+  rm -f "${flag_path}"
+  blitz_log "${STEP}" "flag-off" "success" "path=${flag_path}" 0
+}
+
+blitz_load_boot_env
+blitz_require_root "${STEP}"
+blitz_prepare_runtime_dir
+
+case "${1:-}" in
+  bside-crash)
+    kill -9 "$(require_running_pid "${B_SIDE_SERVICE}")"
+    ;;
+  bside-process-freeze)
+    kill -STOP "$(require_running_pid "${B_SIDE_SERVICE}")"
+    ;;
+  bside-video-thread-stall)
+    write_fault_flag "fault-injection-bside-video-thread-stall"
+    ;;
+  bside-control-thread-stall)
+    write_fault_flag "fault-injection-bside-control-thread-stall"
+    ;;
+  ros-crash)
+    kill -9 "$(require_running_pid "${ROS_SERVICE}")"
+    ;;
+  ros-freeze)
+    kill -STOP "$(require_running_pid "${ROS_SERVICE}")"
+    ;;
+  network-down)
+    if [[ "${BLITZ_WATCHDOG_ALLOW_FAULT_INJECTION}" != "1" ]]; then
+      blitz_log "${STEP}" "network-down" "failure" "set BLITZ_WATCHDOG_ALLOW_FAULT_INJECTION=1 first" 1
+      exit 1
+    fi
+    case "${2:-}" in
+      on)
+        write_fault_flag "fault-injection-network-down"
+        ;;
+      off)
+        clear_fault_flag "fault-injection-network-down"
+        ;;
+      *)
+        echo "usage: $0 network-down on|off" >&2
+        exit 2
+        ;;
+    esac
+    ;;
+  *)
+    cat <<'EOF'
+usage:
+  blitz-fault-inject.sh bside-crash
+  blitz-fault-inject.sh bside-process-freeze
+  blitz-fault-inject.sh bside-video-thread-stall
+  blitz-fault-inject.sh bside-control-thread-stall
+  blitz-fault-inject.sh ros-crash
+  blitz-fault-inject.sh ros-freeze
+  blitz-fault-inject.sh network-down on|off
+EOF
+    exit 2
+    ;;
+esac

scripts/boot/blitz-watchdog.sh

@@ -0,0 +1,398 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+STEP="watchdog"
+B_SIDE_SERVICE="blitz-b-side-omnid.service"
+ROS_SERVICE="blitz-ros-receiver.service"
+B_SIDE_STATUS_FILE=""
+ROS_STATUS_FILE=""
+WATCHDOG_STATUS_FILE=""
+NETWORK_FAULT_FILE=""
+CAMERA_MISSING_PREV=0
+CAMERA_RECOVERY_STABLE_COUNT=0
+NETWORK_FAIL_COUNT=0
+NETWORK_COOLDOWN_UNTIL=0
+BACKOFF_UNTIL=0
+LAST_ACTION="none"
+LAST_ACTION_EPOCH_MS=0
+FULL_RESTART_WINDOW_START=0
+FULL_RESTART_WINDOW_COUNT=0
+NETWORK_LAST_INTERFACE=""
+declare -A TARGETED_RESTART_WINDOW_START=()
+declare -A TARGETED_RESTART_WINDOW_COUNT=()
+
+now_epoch_sec() {
+  date +%s
+}
+
+now_epoch_ms() {
+  date +%s%3N
+}
+
+service_is_active() {
+  systemctl is-active --quiet "$1"
+}
+
+status_file_fresh() {
+  local path="$1"
+  local max_age_sec="$2"
+  local now_sec
+  local mtime_sec
+
+  if [[ ! -f "${path}" ]]; then
+    return 1
+  fi
+  now_sec="$(now_epoch_sec)"
+  mtime_sec="$(stat -c %Y "${path}" 2>/dev/null || echo 0)"
+  (( now_sec - mtime_sec <= max_age_sec ))
+}
+
+ros_receiver_status_fresh() {
+  local path="$1"
+  local max_age_sec="$2"
+  local now_epoch_ms_value
+
+  now_epoch_ms_value="$(now_epoch_ms)"
+  python3 - "${path}" "${now_epoch_ms_value}" "${max_age_sec}" <<'PY'
+import json
+import sys
+
+path = sys.argv[1]
+now_epoch_ms = int(sys.argv[2])
+max_age_ms = int(sys.argv[3]) * 1000
+
+try:
+    with open(path, "r", encoding="utf-8") as handle:
+        payload = json.load(handle)
+except Exception:
+    raise SystemExit(1)
+
+heartbeat_ms = int(payload.get("recv_thread_heartbeat_epoch_ms") or 0)
+socket_bound = bool(payload.get("socket_bound"))
+
+if heartbeat_ms <= 0 or not socket_bound:
+    raise SystemExit(1)
+
+raise SystemExit(0 if now_epoch_ms - heartbeat_ms <= max_age_ms else 1)
+PY
+}
+
+ros_receiver_healthy() {
+  local max_age_sec="$1"
+
+  service_is_active "${ROS_SERVICE}" \
+    && [[ -S "${ROBOT_RECEIVER_LOCAL_SOCKET_PATH}" ]] \
+    && status_file_fresh "${ROS_STATUS_FILE}" "${max_age_sec}" \
+    && ros_receiver_status_fresh "${ROS_STATUS_FILE}" "${max_age_sec}"
+}
+
+write_watchdog_status() {
+  local fault_reason="$1"
+  local recovery_state="$2"
+  local network_ok="$3"
+  local camera_ok="$4"
+  local ros_ok="$5"
+  local bside_ok="$6"
+  local tmp_file
+
+  tmp_file="${WATCHDOG_STATUS_FILE}.tmp.$$"
+  cat > "${tmp_file}" <<EOF
+{
+  "updated_at_epoch_ms": $(now_epoch_ms),
+  "fault_reason": "${fault_reason}",
+  "recovery_state": "${recovery_state}",
+  "network_ok": ${network_ok},
+  "camera_ok": ${camera_ok},
+  "ros_ok": ${ros_ok},
+  "bside_ok": ${bside_ok},
+  "network_fail_count": ${NETWORK_FAIL_COUNT},
+  "targeted_restart_count": $(targeted_restart_total),
+  "full_restart_count": ${FULL_RESTART_WINDOW_COUNT},
+  "last_action": "${LAST_ACTION}",
+  "last_action_epoch_ms": ${LAST_ACTION_EPOCH_MS}
+}
+EOF
+  mv -f "${tmp_file}" "${WATCHDOG_STATUS_FILE}"
+}
+
+set_last_action() {
+  LAST_ACTION="$1"
+  LAST_ACTION_EPOCH_MS="$(now_epoch_ms)"
+}
+
+targeted_restart_total() {
+  local total=0
+  local key
+
+  for key in "${!TARGETED_RESTART_WINDOW_COUNT[@]}"; do
+    total=$(( total + TARGETED_RESTART_WINDOW_COUNT["${key}"] ))
+  done
+  printf '%s\n' "${total}"
+}
+
+register_targeted_restart() {
+  local fault_key="$1"
+  local now_sec
+  local window_start
+  local count
+
+  now_sec="$(now_epoch_sec)"
+  window_start="${TARGETED_RESTART_WINDOW_START["${fault_key}"]:-0}"
+  count="${TARGETED_RESTART_WINDOW_COUNT["${fault_key}"]:-0}"
+  if (( window_start == 0 || now_sec - window_start > 60 )); then
+    window_start="${now_sec}"
+    count=1
+  else
+    count=$(( count + 1 ))
+  fi
+  TARGETED_RESTART_WINDOW_START["${fault_key}"]="${window_start}"
+  TARGETED_RESTART_WINDOW_COUNT["${fault_key}"]="${count}"
+  (( count >= 2 ))
+}
+
+record_full_restart() {
+  local now_sec
+
+  now_sec="$(now_epoch_sec)"
+  if (( FULL_RESTART_WINDOW_START == 0 || now_sec - FULL_RESTART_WINDOW_START > 600 )); then
+    FULL_RESTART_WINDOW_START="${now_sec}"
+    FULL_RESTART_WINDOW_COUNT=1
+  else
+    FULL_RESTART_WINDOW_COUNT=$(( FULL_RESTART_WINDOW_COUNT + 1 ))
+  fi
+  if (( FULL_RESTART_WINDOW_COUNT >= 3 )); then
+    BACKOFF_UNTIL=$(( now_sec + 60 ))
+  fi
+}
+
+restart_bside_targeted() {
+  local fault_key="$1"
+  local reason="$2"
+  local rc
+
+  if register_targeted_restart "${fault_key}"; then
+    blitz_log "${STEP}" "escalate-full-restart" "start" "reason=${reason}" 0
+    full_restart_stack "${reason}-escalated"
+    return 0
+  fi
+
+  set_last_action "restart-bside"
+  RECOVERY_ACTION_TAKEN=1
+  blitz_log "${STEP}" "restart-bside" "start" "reason=${reason}" 0
+  if systemctl restart "${B_SIDE_SERVICE}"; then
+    blitz_log "${STEP}" "restart-bside" "success" "reason=${reason}" 0
+    return 0
+  fi
+
+  rc=$?
+  blitz_log "${STEP}" "restart-bside" "failure" "reason=${reason}" "${rc}"
+  return "${rc}"
+}
+
+full_restart_stack() {
+  local reason="$1"
+  local rc
+
+  set_last_action "full-restart"
+  RECOVERY_ACTION_TAKEN=1
+  recovery_state="recovering"
+  fault_reason="${reason}"
+
+  blitz_log "${STEP}" "full-restart-stop-bside" "start" "reason=${reason}" 0
+  systemctl stop "${B_SIDE_SERVICE}" || true
+
+  if systemctl restart "${ROS_SERVICE}"; then
+    blitz_log "${STEP}" "full-restart-restart-ros" "success" "reason=${reason}" 0
+  else
+    rc=$?
+    blitz_log "${STEP}" "full-restart-restart-ros" "failure" "reason=${reason}" "${rc}"
+    record_full_restart
+    return "${rc}"
+  fi
+
+  if bash "${SCRIPT_DIR}/wait-for-unix-socket.sh" --step "${STEP}" --timeout "${BLITZ_ROS_SOCKET_WAIT_SEC}"; then
+    :
+  else
+    rc=$?
+    blitz_log "${STEP}" "full-restart-wait-socket" "failure" "reason=${reason}" "${rc}"
+    record_full_restart
+    return "${rc}"
+  fi
+
+  if systemctl start "${B_SIDE_SERVICE}"; then
+    blitz_log "${STEP}" "full-restart-start-bside" "success" "reason=${reason}" 0
+  else
+    rc=$?
+    blitz_log "${STEP}" "full-restart-start-bside" "failure" "reason=${reason}" "${rc}"
+    record_full_restart
+    return "${rc}"
+  fi
+  record_full_restart
+}
+
+network_fault_injected() {
+  [[ "${BLITZ_WATCHDOG_ALLOW_FAULT_INJECTION}" == "1" && -f "${NETWORK_FAULT_FILE}" ]]
+}
+
+resolve_network_interface() {
+  NETWORK_LAST_INTERFACE="$(blitz_resolve_5g_interface || true)"
+  [[ -n "${NETWORK_LAST_INTERFACE}" ]]
+}
+
+network_is_healthy() {
+  local route_output
+
+  NETWORK_LAST_INTERFACE=""
+  if network_fault_injected; then
+    return 1
+  fi
+  if ! resolve_network_interface; then
+    return 1
+  fi
+  route_output="$(blitz_route_ready "${BLITZ_TIME_SERVER_IP}" "${NETWORK_LAST_INTERFACE}" || true)"
+  if [[ -z "${route_output}" ]]; then
+    return 1
+  fi
+  ping -I "${NETWORK_LAST_INTERFACE}" -c 1 -W 2 "${BLITZ_TIME_SERVER_IP}" >/dev/null 2>&1
+}
+
+wait_for_network_recovery() {
+  local timeout_sec="$1"
+  local waited=0
+
+  while (( waited < timeout_sec )); do
+    if network_is_healthy; then
+      blitz_log "${STEP}" "network-postcheck" "success" "interface=${NETWORK_LAST_INTERFACE} waited_sec=${waited}" 0
+      return 0
+    fi
+    if (( waited == 0 || waited % 5 == 0 )); then
+      blitz_log "${STEP}" "network-postcheck" "waiting" "interface=${NETWORK_LAST_INTERFACE:-unresolved} waited_sec=${waited}" 0
+    fi
+    sleep 1
+    waited=$(( waited + 1 ))
+  done
+
+  blitz_log "${STEP}" "network-postcheck" "failure" "interface=${NETWORK_LAST_INTERFACE:-unresolved} timeout_sec=${timeout_sec}" 1
+  return 1
+}
+
+perform_network_recovery() {
+  local rc=0
+
+  set_last_action "network-recovery"
+  RECOVERY_ACTION_TAKEN=1
+  blitz_log "${STEP}" "network-recovery" "start" "fail_count=${NETWORK_FAIL_COUNT}" 0
+  systemctl stop "${B_SIDE_SERVICE}" || true
+
+  if bash "${SCRIPT_DIR}/5g-dial.sh"; then
+    :
+  else
+    rc=$?
+    blitz_log "${STEP}" "network-redial" "failure" "fail_count=${NETWORK_FAIL_COUNT} script=${SCRIPT_DIR}/5g-dial.sh" "${rc}"
+    return "${rc}"
+  fi
+
+  if wait_for_network_recovery "${BLITZ_5G_ROUTE_WAIT_SEC}"; then
+    :
+  else
+    rc=$?
+    blitz_log "${STEP}" "network-recovery" "failure" "fail_count=${NETWORK_FAIL_COUNT} interface=${NETWORK_LAST_INTERFACE:-unresolved}" "${rc}"
+    return "${rc}"
+  fi
+
+  NETWORK_COOLDOWN_UNTIL=$(( $(now_epoch_sec) + BLITZ_NETWORK_RECOVERY_COOLDOWN_SEC ))
+  NETWORK_FAIL_COUNT=0
+  if ros_receiver_healthy "${BLITZ_HEALTH_STALE_SEC}"; then
+    restart_bside_targeted "network" "network-recovered"
+    return 0
+  fi
+  full_restart_stack "network-recovered-ros-unhealthy"
+  return 0
+}
+
+blitz_load_boot_env
+blitz_require_root "${STEP}"
+blitz_require_command systemctl "${STEP}"
+blitz_require_command stat "${STEP}"
+blitz_require_command ping "${STEP}"
+blitz_require_command python3 "${STEP}"
+blitz_prepare_runtime_dir
+
+B_SIDE_STATUS_FILE="${BLITZ_RUNTIME_DIR}/b-side-omnid.status.json"
+ROS_STATUS_FILE="${BLITZ_RUNTIME_DIR}/ros-receiver.status.json"
+WATCHDOG_STATUS_FILE="${BLITZ_RUNTIME_DIR}/watchdog.status.json"
+NETWORK_FAULT_FILE="${BLITZ_RUNTIME_DIR}/fault-injection-network-down"
+
+while true; do
+  fault_reason="none"
+  recovery_state="ok"
+  network_ok=1
+  camera_ok=1
+  ros_ok=1
+  bside_ok=1
+  RECOVERY_ACTION_TAKEN=0
+  now_sec="$(now_epoch_sec)"
+
+  if (( BACKOFF_UNTIL > now_sec )); then
+    fault_reason="backoff"
+    recovery_state="backoff"
+    write_watchdog_status "${fault_reason}" "${recovery_state}" 0 0 0 0
+    sleep "${BLITZ_WATCHDOG_INTERVAL_SEC}"
+    continue
+  fi
+
+  if (( NETWORK_COOLDOWN_UNTIL > now_sec )); then
+    recovery_state="recovering"
+  elif ! network_is_healthy; then
+    network_ok=0
+    NETWORK_FAIL_COUNT=$(( NETWORK_FAIL_COUNT + 1 ))
+    fault_reason="network_or_robot_unreachable"
+    recovery_state="recovering"
+    blitz_log "${STEP}" "network-check" "failure" "count=${NETWORK_FAIL_COUNT} interface=${NETWORK_LAST_INTERFACE:-unresolved}" 1
+    if (( NETWORK_FAIL_COUNT >= BLITZ_NETWORK_FAIL_THRESHOLD )); then
+      perform_network_recovery || true
+    fi
+  else
+    NETWORK_FAIL_COUNT=0
+  fi
+
+  if [[ ! -e "${OMNI_CAMERA_DEVICE}" ]]; then
+    camera_ok=0
+    fault_reason="camera_missing"
+    recovery_state="degraded"
+    CAMERA_MISSING_PREV=1
+    CAMERA_RECOVERY_STABLE_COUNT=0
+  elif (( RECOVERY_ACTION_TAKEN == 0 && CAMERA_MISSING_PREV == 1 )); then
+    CAMERA_RECOVERY_STABLE_COUNT=$(( CAMERA_RECOVERY_STABLE_COUNT + 1 ))
+    recovery_state="recovering"
+    fault_reason="camera_recovered"
+    if (( CAMERA_RECOVERY_STABLE_COUNT >= 2 )); then
+      restart_bside_targeted "camera" "camera-reappeared" || true
+      CAMERA_MISSING_PREV=0
+      CAMERA_RECOVERY_STABLE_COUNT=0
+    fi
+  else
+    CAMERA_RECOVERY_STABLE_COUNT=0
+  fi
+
+  if (( RECOVERY_ACTION_TAKEN == 0 )) && { ! service_is_active "${B_SIDE_SERVICE}" || ! status_file_fresh "${B_SIDE_STATUS_FILE}" "${BLITZ_HEALTH_STALE_SEC}"; }; then
+    bside_ok=0
+    fault_reason="bside_status_stale"
+    recovery_state="recovering"
+    restart_bside_targeted "bside" "bside-unhealthy" || true
+  fi
+
+  if (( RECOVERY_ACTION_TAKEN == 0 )) && ! ros_receiver_healthy "${BLITZ_HEALTH_STALE_SEC}"; then
+    ros_ok=0
+    fault_reason="ros_receiver_unhealthy"
+    recovery_state="recovering"
+    full_restart_stack "ros-unhealthy" || true
+  fi
+
+  write_watchdog_status "${fault_reason}" "${recovery_state}" "${network_ok}" "${camera_ok}" "${ros_ok}" "${bside_ok}"
+  sleep "${BLITZ_WATCHDOG_INTERVAL_SEC}"
+done

scripts/boot/boot-gate.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+STEP="boot-gate"
+
+blitz_load_boot_env
+
+blitz_log "${STEP}" "start" "start" "delay_sec=${BLITZ_BOOT_DELAY_SEC}" 0
+blitz_log "${STEP}" "delay" "start" "sleep ${BLITZ_BOOT_DELAY_SEC}s before starting Blitz services" 0
+sleep "${BLITZ_BOOT_DELAY_SEC}"
+blitz_log "${STEP}" "delay" "success" "boot gate released after ${BLITZ_BOOT_DELAY_SEC}s" 0

scripts/boot/common.sh

@@ -0,0 +1,407 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+BOOT_SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+DEV_SCRIPT_DIR="$(cd "${BOOT_SCRIPT_DIR}/../dev" && pwd)"
+
+source_with_nounset_off() {
+  set +u
+  # shellcheck disable=SC1090
+  source "$1"
+  set -u
+}
+
+blitz_host_from_addr() {
+  local value="${1:-}"
+
+  if [[ -z "${value}" ]]; then
+    return 1
+  fi
+  if [[ "${value}" == \[*\]:* ]]; then
+    value="${value#\[}"
+    printf '%s\n' "${value%%]:*}"
+    return 0
+  fi
+  printf '%s\n' "${value%%:*}"
+}
+
+blitz_load_boot_env() {
+  local env_file
+  local default_time_server
+
+  if [[ "${BLITZ_BOOT_ENV_LOADED:-0}" == "1" ]]; then
+    return 0
+  fi
+
+  # shellcheck disable=SC1091
+  source "${DEV_SCRIPT_DIR}/load-env.sh"
+
+  for env_file in \
+    "${BOOT_SCRIPT_DIR}/robot-boot.env" \
+    "${BOOT_SCRIPT_DIR}/robot-boot.env.local"
+  do
+    if [[ -f "${env_file}" ]]; then
+      set -a
+      # shellcheck disable=SC1090
+      source "${env_file}"
+      set +a
+    fi
+  done
+
+  default_time_server="$(blitz_host_from_addr "${ROBOT_SIDE_OMNISOCKET_SERVER_ADDR:-}" || true)"
+
+  export BLITZ_BOOT_DELAY_SEC="${BLITZ_BOOT_DELAY_SEC:-30}"
+  export BLITZ_LOG_FILE="${BLITZ_LOG_FILE:-/var/log/blitz-robot/startup.log}"
+  export BLITZ_RUNTIME_DIR="${BLITZ_RUNTIME_DIR:-/run/blitz-robot}"
+  export BLITZ_5G_DIAL_DIR="${BLITZ_5G_DIAL_DIR:-${BOOT_SCRIPT_DIR}}"
+  export BLITZ_5G_SERIAL_PORT="${BLITZ_5G_SERIAL_PORT:-/dev/ttyUSB7}"
+  export BLITZ_5G_INTERFACE="${BLITZ_5G_INTERFACE:-}"
+  export BLITZ_5G_MODEM_SUBNET="${BLITZ_5G_MODEM_SUBNET:-192.168.224.0/22}"
+  export BLITZ_5G_GATEWAY="${BLITZ_5G_GATEWAY:-192.168.225.1}"
+  export BLITZ_5G_SKIP_DHCP="${BLITZ_5G_SKIP_DHCP:-0}"
+  export BLITZ_5G_REMOVE_DEFAULT_ROUTE="${BLITZ_5G_REMOVE_DEFAULT_ROUTE:-1}"
+  export BLITZ_5G_ROUTE_TARGETS="${BLITZ_5G_ROUTE_TARGETS:-106.55.173.235}"
+  export BLITZ_5G_INFO_JSON="${BLITZ_5G_INFO_JSON:-${BLITZ_5G_DIAL_DIR}/modem_network_info.json}"
+  export BLITZ_5G_DISABLE_INTERFACES="${BLITZ_5G_DISABLE_INTERFACES:-}"
+  export BLITZ_5G_SERIAL_WAIT_SEC="${BLITZ_5G_SERIAL_WAIT_SEC:-60}"
+  export BLITZ_5G_ROUTE_WAIT_SEC="${BLITZ_5G_ROUTE_WAIT_SEC:-30}"
+  export BLITZ_TIME_SERVER_IP="${BLITZ_TIME_SERVER_IP:-${default_time_server}}"
+  export BLITZ_ROS_USER="${BLITZ_ROS_USER:-nvidia}"
+  export BLITZ_ROS_SOCKET_WAIT_SEC="${BLITZ_ROS_SOCKET_WAIT_SEC:-20}"
+  export BLITZ_WATCHDOG_INTERVAL_SEC="${BLITZ_WATCHDOG_INTERVAL_SEC:-5}"
+  export BLITZ_HEALTH_STALE_SEC="${BLITZ_HEALTH_STALE_SEC:-15}"
+  export BLITZ_OMNID_THREAD_HEARTBEAT_TIMEOUT_SEC="${BLITZ_OMNID_THREAD_HEARTBEAT_TIMEOUT_SEC:-15}"
+  export BLITZ_NETWORK_FAIL_THRESHOLD="${BLITZ_NETWORK_FAIL_THRESHOLD:-3}"
+  export BLITZ_NETWORK_RECOVERY_COOLDOWN_SEC="${BLITZ_NETWORK_RECOVERY_COOLDOWN_SEC:-30}"
+  export BLITZ_WATCHDOG_ALLOW_FAULT_INJECTION="${BLITZ_WATCHDOG_ALLOW_FAULT_INJECTION:-0}"
+  export BLITZ_BOOT_ENV_LOADED="1"
+}
+
+blitz_timestamp() {
+  date '+%Y-%m-%d %H:%M:%S%z'
+}
+
+blitz_sanitize_detail() {
+  local detail="${1:-}"
+
+  detail="${detail//$'\n'/ ; }"
+  detail="${detail//$'\r'/ }"
+  printf '%s' "${detail}"
+}
+
+blitz_log() {
+  local step="${1:-unknown-step}"
+  local action="${2:-unknown-action}"
+  local result="${3:-info}"
+  local details="${4:-}"
+  local exit_code="${5:-0}"
+
+  printf '%s | %s | %s | %s | %s | %s\n' \
+    "$(blitz_timestamp)" \
+    "${step}" \
+    "${action}" \
+    "${result}" \
+    "$(blitz_sanitize_detail "${details}")" \
+    "${exit_code}"
+}
+
+blitz_join_cmd() {
+  local cmd=()
+  local arg
+
+  for arg in "$@"; do
+    cmd+=("$(printf '%q' "${arg}")")
+  done
+  printf '%s' "${cmd[*]}"
+}
+
+blitz_require_command() {
+  local command_name="$1"
+  local step="${2:-precheck}"
+
+  if command -v "${command_name}" >/dev/null 2>&1; then
+    blitz_log "${step}" "require-command" "success" "command=${command_name}" 0
+    return 0
+  fi
+
+  blitz_log "${step}" "require-command" "failure" "missing command: ${command_name}" 127
+  return 127
+}
+
+blitz_require_file() {
+  local path="$1"
+  local step="${2:-precheck}"
+
+  if [[ -f "${path}" ]]; then
+    blitz_log "${step}" "require-file" "success" "path=${path}" 0
+    return 0
+  fi
+
+  blitz_log "${step}" "require-file" "failure" "missing file: ${path}" 1
+  return 1
+}
+
+blitz_require_executable() {
+  local path="$1"
+  local step="${2:-precheck}"
+
+  if [[ -x "${path}" ]]; then
+    blitz_log "${step}" "require-executable" "success" "path=${path}" 0
+    return 0
+  fi
+
+  blitz_log "${step}" "require-executable" "failure" "missing executable: ${path}" 1
+  return 1
+}
+
+blitz_require_root() {
+  local step="${1:-precheck}"
+
+  if [[ "${EUID}" -eq 0 ]]; then
+    blitz_log "${step}" "require-root" "success" "uid=${EUID}" 0
+    return 0
+  fi
+
+  blitz_log "${step}" "require-root" "failure" "root privileges are required" 1
+  return 1
+}
+
+blitz_run() {
+  local step="$1"
+  local action="$2"
+  local rc
+  shift 2
+
+  blitz_log "${step}" "${action}" "start" "$(blitz_join_cmd "$@")" 0
+  if "$@"; then
+    blitz_log "${step}" "${action}" "success" "$(blitz_join_cmd "$@")" 0
+    return 0
+  else
+    rc=$?
+  fi
+
+  blitz_log "${step}" "${action}" "failure" "$(blitz_join_cmd "$@")" "${rc}"
+  return "${rc}"
+}
+
+blitz_route_ready() {
+  local target_ip="$1"
+  local expected_interface="${2:-}"
+  local route_output
+
+  route_output="$(ip route get "${target_ip}" 2>&1 || true)"
+  if [[ -z "${route_output}" ]]; then
+    return 1
+  fi
+  if [[ "${route_output}" == *"unreachable"* || "${route_output}" == *"prohibit"* ]]; then
+    return 1
+  fi
+  if [[ -n "${expected_interface}" && "${route_output}" != *" dev ${expected_interface} "* && "${route_output}" != *" dev ${expected_interface}" ]]; then
+    return 1
+  fi
+
+  printf '%s\n' "${route_output}"
+  return 0
+}
+
+blitz_interface_exists() {
+  local interface_name="${1:-}"
+
+  if [[ -z "${interface_name}" ]]; then
+    return 1
+  fi
+  ip link show dev "${interface_name}" >/dev/null 2>&1
+}
+
+blitz_read_5g_info_interface() {
+  local info_json="$1"
+
+  if [[ -z "${info_json}" || ! -f "${info_json}" ]]; then
+    return 1
+  fi
+
+  python3 - "${info_json}" <<'PY'
+import json
+import sys
+
+path = sys.argv[1]
+
+try:
+    with open(path, "r", encoding="utf-8") as handle:
+        payload = json.load(handle)
+except Exception:
+    raise SystemExit(1)
+
+interface = str(payload.get("interface") or "").strip()
+if not interface:
+    raise SystemExit(1)
+
+print(interface)
+PY
+}
+
+blitz_detect_5g_interface_from_subnet() {
+  local modem_subnet="${1:-${BLITZ_5G_MODEM_SUBNET:-}}"
+
+  if [[ -z "${modem_subnet}" ]]; then
+    return 1
+  fi
+
+  python3 - "${modem_subnet}" <<'PY'
+import ipaddress
+import json
+import subprocess
+import sys
+
+subnet = ipaddress.ip_network(sys.argv[1], strict=False)
+skip = {"lo", "docker0", "l4tbr0"}
+
+def priority(name: str) -> tuple[int, str]:
+    if name.startswith("enx"):
+        return (0, name)
+    if name.startswith("wwan"):
+        return (1, name)
+    if name.startswith("usb"):
+        return (2, name)
+    if name.startswith("eth"):
+        return (3, name)
+    return (9, name)
+
+try:
+    output = subprocess.check_output(["ip", "-j", "-4", "addr", "show"], text=True)
+    payload = json.loads(output)
+except Exception:
+    raise SystemExit(1)
+
+candidates = []
+for item in payload:
+    ifname = str(item.get("ifname") or "").strip()
+    if not ifname or ifname in skip:
+        continue
+    for addr in item.get("addr_info") or []:
+        if addr.get("family") != "inet":
+            continue
+        local = addr.get("local")
+        prefixlen = addr.get("prefixlen")
+        if not local or prefixlen is None:
+            continue
+        try:
+            iface = ipaddress.ip_interface(f"{local}/{prefixlen}")
+        except ValueError:
+            continue
+        if iface.ip in subnet:
+            candidates.append((priority(ifname), ifname))
+            break
+
+if not candidates:
+    raise SystemExit(1)
+
+candidates.sort(key=lambda item: item[0])
+print(candidates[0][1])
+PY
+}
+
+blitz_refresh_5g_info_json() {
+  local interface_name="$1"
+  local info_json="${2:-${BLITZ_5G_INFO_JSON:-}}"
+
+  if [[ -z "${interface_name}" || -z "${info_json}" ]]; then
+    return 1
+  fi
+
+  python3 - "${interface_name}" "${info_json}" <<'PY'
+import json
+import os
+import subprocess
+import sys
+
+interface_name = sys.argv[1]
+path = sys.argv[2]
+
+try:
+    output = subprocess.check_output(["ip", "-j", "addr", "show", "dev", interface_name], text=True)
+    payload = json.loads(output)
+except Exception:
+    raise SystemExit(1)
+
+if not payload:
+    raise SystemExit(1)
+
+item = payload[0]
+ipv4 = []
+ipv6 = []
+for addr in item.get("addr_info") or []:
+    local = addr.get("local")
+    prefixlen = addr.get("prefixlen")
+    family = addr.get("family")
+    if not local or prefixlen is None:
+        continue
+    entry = f"{local}/{prefixlen}"
+    if family == "inet":
+        ipv4.append(entry)
+    elif family == "inet6":
+        ipv6.append(entry)
+
+data = {
+    "interface": interface_name,
+    "ipv4": ipv4,
+    "ipv6": ipv6,
+}
+
+parent = os.path.dirname(path)
+if parent:
+    os.makedirs(parent, exist_ok=True)
+temp_path = f"{path}.tmp.{os.getpid()}"
+with open(temp_path, "w", encoding="utf-8") as handle:
+    json.dump(data, handle, ensure_ascii=False, indent=2)
+os.replace(temp_path, path)
+PY
+}
+
+blitz_resolve_5g_interface() {
+  local explicit_interface="${BLITZ_5G_INTERFACE:-}"
+  local info_json="${BLITZ_5G_INFO_JSON:-}"
+  local recorded_interface=""
+  local detected_interface=""
+
+  if [[ -n "${explicit_interface}" ]]; then
+    if blitz_interface_exists "${explicit_interface}"; then
+      printf '%s\n' "${explicit_interface}"
+      return 0
+    fi
+    return 1
+  fi
+
+  recorded_interface="$(blitz_read_5g_info_interface "${info_json}" || true)"
+  if [[ -n "${recorded_interface}" ]] && blitz_interface_exists "${recorded_interface}"; then
+    printf '%s\n' "${recorded_interface}"
+    return 0
+  fi
+
+  detected_interface="$(blitz_detect_5g_interface_from_subnet || true)"
+  if [[ -n "${detected_interface}" ]]; then
+    if [[ "${detected_interface}" != "${recorded_interface}" ]]; then
+      blitz_refresh_5g_info_json "${detected_interface}" "${info_json}" >/dev/null 2>&1 || true
+    fi
+    printf '%s\n' "${detected_interface}"
+    return 0
+  fi
+
+  return 1
+}
+
+blitz_prepare_runtime_dir() {
+  local runtime_dir
+
+  blitz_load_boot_env
+  runtime_dir="${BLITZ_RUNTIME_DIR}"
+
+  mkdir -p "${runtime_dir}"
+  if [[ "${EUID}" -eq 0 ]]; then
+    chown "root:${BLITZ_ROS_USER}" "${runtime_dir}"
+    chmod 0775 "${runtime_dir}"
+  else
+    chmod 0775 "${runtime_dir}" 2>/dev/null || true
+  fi
+  blitz_log "runtime-dir" "prepare" "success" "path=${runtime_dir}" 0
+}

scripts/boot/disable-systemd.sh

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+STEP="disable"
+SYSTEMD_DEST_DIR="/etc/systemd/system"
+UNITS=(
+  "blitz-watchdog.service"
+  "blitz-b-side-omnid.service"
+  "blitz-ros-receiver.service"
+  "blitz-5g-dial.service"
+  "blitz-boot-gate.service"
+  "blitz-robot.target"
+)
+
+stop_unit_if_present() {
+  local unit_name="$1"
+  local unit_path="${SYSTEMD_DEST_DIR}/${unit_name}"
+
+  if [[ ! -f "${unit_path}" ]]; then
+    return 0
+  fi
+  blitz_run "${STEP}" "stop-unit" systemctl stop "${unit_name}" || true
+}
+
+disable_unit_if_present() {
+  local unit_name="$1"
+  local unit_path="${SYSTEMD_DEST_DIR}/${unit_name}"
+
+  if [[ ! -f "${unit_path}" ]]; then
+    return 0
+  fi
+  blitz_run "${STEP}" "disable-unit" systemctl disable "${unit_name}" || true
+}
+
+blitz_load_boot_env
+blitz_require_root "${STEP}"
+blitz_require_command systemctl "${STEP}"
+
+for unit_name in "${UNITS[@]}"; do
+  stop_unit_if_present "${unit_name}"
+done
+
+for unit_name in "${UNITS[@]}"; do
+  disable_unit_if_present "${unit_name}"
+done
+
+blitz_log "${STEP}" "complete" "success" "boot chain stopped and disabled; next reboot will not auto-start blitz services" 0

scripts/boot/install-systemd.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+SYSTEMD_TEMPLATE_DIR="${SCRIPT_DIR}/systemd"
+SYSTEMD_DEST_DIR="/etc/systemd/system"
+
+render_template() {
+  local template_path="$1"
+  local output_path="$2"
+
+  sed \
+    -e "s|@OMNISOCKETGO_ROOT@|${OMNISOCKETGO_ROOT}|g" \
+    -e "s|@BLITZ_LOG_FILE@|${BLITZ_LOG_FILE}|g" \
+    -e "s|@BLITZ_ROS_USER@|${BLITZ_ROS_USER}|g" \
+    "${template_path}" > "${output_path}"
+}
+
+install_unit() {
+  local template_name="$1"
+  local temp_output
+
+  temp_output="$(mktemp)"
+  render_template "${SYSTEMD_TEMPLATE_DIR}/${template_name}" "${temp_output}"
+  install -m 0644 "${temp_output}" "${SYSTEMD_DEST_DIR}/${template_name%.in}"
+  rm -f "${temp_output}"
+  blitz_log "install" "install-unit" "success" "unit=${SYSTEMD_DEST_DIR}/${template_name%.in}" 0
+}
+
+remove_unit_if_present() {
+  local unit_name="$1"
+  local unit_path="${SYSTEMD_DEST_DIR}/${unit_name}"
+
+  if [[ ! -f "${unit_path}" ]]; then
+    return 0
+  fi
+
+  systemctl disable --now "${unit_name}" >/dev/null 2>&1 || true
+  rm -f "${unit_path}"
+  blitz_log "install" "remove-unit" "success" "unit=${unit_path}" 0
+}
+
+blitz_load_boot_env
+blitz_require_root "install"
+blitz_require_command install "install"
+blitz_require_command systemctl "install"
+
+mkdir -p "${SYSTEMD_DEST_DIR}"
+install -d -m 0755 "$(dirname "${BLITZ_LOG_FILE}")"
+touch "${BLITZ_LOG_FILE}"
+chmod 0644 "${BLITZ_LOG_FILE}"
+blitz_log "install" "prepare-log-file" "success" "log_file=${BLITZ_LOG_FILE}" 0
+blitz_prepare_runtime_dir
+
+install_unit "blitz-boot-gate.service.in"
+install_unit "blitz-5g-dial.service.in"
+install_unit "blitz-ros-receiver.service.in"
+install_unit "blitz-b-side-omnid.service.in"
+install_unit "blitz-watchdog.service.in"
+install_unit "blitz-robot.target.in"
+remove_unit_if_present "blitz-time-sync.service"
+
+blitz_run "install" "daemon-reload" systemctl daemon-reload
+blitz_run "install" "enable-target" systemctl enable blitz-robot.target
+blitz_log "install" "complete" "success" "run systemctl start blitz-robot.target to launch immediately" 0

scripts/boot/modem_network_info.json

@@ -0,0 +1,9 @@
+{
+  "interface": "enx08711b726c22",
+  "ipv4": [
+    "192.168.225.66/22"
+  ],
+  "ipv6": [
+    "fe80::86e0:4771:425d:8b20/64"
+  ]
+}

scripts/boot/prepare-runtime-dir.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+STEP="runtime-dir"
+
+blitz_load_boot_env
+blitz_prepare_runtime_dir
+blitz_log "${STEP}" "complete" "success" "runtime_dir=${BLITZ_RUNTIME_DIR}" 0

scripts/boot/rndis_dial.py

@@ -0,0 +1,854 @@
+#!/usr/bin/env python3
+"""RM520N-GL RNDIS 自动拨号脚本。
+
+流程:
+1. 检测 USB 设备是否存在
+2. 打开 AT 口并检查 SIM 状态
+3. 配置 RNDIS 模式: AT+QCFG="usbnet",3
+4. 重启模块: AT+CFUN=1,1
+5. 等待模块重新枚举并识别 5G 网卡
+6. 如果网卡还没有 IPv4, 自动尝试 DHCP
+
+用法:
+    sudo python3 rndis_dial.py
+    sudo python3 rndis_dial.py --serial-port /dev/ttyUSB7
+    sudo python3 rndis_dial.py --interface eth0 #指定网口
+"""
+
+from __future__ import annotations
+
+import argparse
+import errno
+import ipaddress
+import json
+import os
+import select
+import shlex
+import shutil
+import subprocess
+import sys
+import termios
+import time
+import tty
+
+USB_ID = "2c7c:0801"
+DEFAULT_SERIAL_PORT = "/dev/ttyUSB7" #串口设备节点
+DEFAULT_BAUD_RATE = 115200
+CHECK_INTERVAL = 2
+SERIAL_READ_TIMEOUT = 0.2
+SERIAL_POLL_INTERVAL = 0.1
+SERIAL_SETTLE_DELAY = 0.3
+AT_SYNC_RETRIES = 3
+AT_SYNC_TIMEOUT = 2.5
+# 示例地址 192.168.225.38/22 所在网段。
+# 拨号成功后会用这个网段来最终确认哪个接口是 5G 模组。
+DEFAULT_MODEM_SUBNET = "192.168.224.0/22"
+DEFAULT_MODEM_GATEWAY = "192.168.225.1"
+DEFAULT_PUBLIC_TARGETS = ("81.70.156.140", "106.55.173.235")
+DEFAULT_INFO_JSON = "modem_network_info.json"
+SKIP_INTERFACES = {"lo", "docker0", "l4tbr0"}
+BAUD_RATE_MAP = {
+    9600: termios.B9600,
+    19200: termios.B19200,
+    38400: termios.B38400,
+    57600: termios.B57600,
+    115200: termios.B115200,
+}
+
+
+def run_cmd(cmd, timeout=30, check=False):
+    print(f"[CMD] {format_shell_cmd(cmd)}")
+    result = subprocess.run(
+        cmd,
+        capture_output=True,
+        text=True,
+        timeout=timeout,
+        check=False,
+    )
+    output = (result.stdout or "") + (result.stderr or "")
+    if check and result.returncode != 0:
+        raise RuntimeError(f"命令执行失败: {' '.join(cmd)}\n{output.strip()}")
+    return result.returncode, output.strip()
+
+
+def format_shell_cmd(cmd):
+    """把命令参数格式化成可直接阅读的 shell 形式。"""
+    return " ".join(shlex.quote(part) for part in cmd)
+
+
+def parse_ipv4_address(value):
+    try:
+        return str(ipaddress.IPv4Address(value))
+    except ipaddress.AddressValueError as exc:
+        raise argparse.ArgumentTypeError(f"无效的 IPv4 地址: {value}") from exc
+
+
+def dedupe_keep_order(values):
+    seen = set()
+    result = []
+    for value in values:
+        if value in seen:
+            continue
+        seen.add(value)
+        result.append(value)
+    return result
+
+
+def require_root():
+    if os.geteuid() != 0:
+        print("[FAIL] 请使用 sudo 运行此脚本")
+        sys.exit(1)
+
+
+def require_commands():
+    missing = [cmd for cmd in ("lsusb", "ip") if shutil.which(cmd) is None]
+    if missing:
+        print(f"[FAIL] 缺少系统命令: {', '.join(missing)}")
+        sys.exit(1)
+
+
+def usb_device_present():
+    # 1. 第一次检测 lsusb，确认模块已经被系统识别。
+    """通过 lsusb 检查模块是否已经被系统识别。"""
+    code, output = run_cmd(["lsusb"], timeout=10)
+    if code != 0:
+        return False, output
+
+    for line in output.splitlines():
+        if USB_ID in line:
+            return True, line.strip()
+    return False, output
+
+
+def wait_for_usb_device(expected_present, timeout):
+    """等待模块 USB 设备下线或重新上线。"""
+    deadline = time.time() + timeout
+    last_seen = ""
+    while time.time() < deadline:
+        present, detail = usb_device_present()
+        last_seen = detail
+        if present == expected_present:
+            return True, detail
+        time.sleep(CHECK_INTERVAL)
+    return False, last_seen
+
+
+def wait_for_path(path, timeout):
+    """等待串口节点或其他路径重新出现。"""
+    deadline = time.time() + timeout
+    while time.time() < deadline:
+        if os.path.exists(path):
+            return True
+        time.sleep(1)
+    return False
+
+
+def normalize_serial_output(text):
+    """整理串口原始输出，便于后续匹配关键字。"""
+    cleaned = text.replace("\r", "\n")
+    return "\n".join(line for line in cleaned.splitlines() if line.strip()).strip()
+
+
+def serial_response_complete(text):
+    if not text:
+        return False
+
+    for line in reversed(text.splitlines()):
+        stripped = line.strip()
+        if stripped == "OK":
+            return True
+        if "ERROR" in stripped:
+            return True
+    return False
+
+
+class RawSerialSession:
+    """使用 Python 标准库直接控制 Linux 串口，尽量贴近 stty/raw 行为。"""
+
+    def __init__(self, port, baudrate):
+        if baudrate not in BAUD_RATE_MAP:
+            raise RuntimeError(f"不支持的波特率: {baudrate}")
+
+        self.port = port
+        self.fd = None
+        self._original_attrs = None
+
+        try:
+            self.fd = os.open(port, os.O_RDWR | os.O_NOCTTY | os.O_NONBLOCK)
+            self._original_attrs = termios.tcgetattr(self.fd)
+            tty.setraw(self.fd, when=termios.TCSANOW)
+
+            attrs = termios.tcgetattr(self.fd)
+            attrs[0] = 0
+            attrs[1] = 0
+            attrs[2] &= ~(termios.PARENB | termios.CSTOPB | termios.CSIZE)
+            attrs[2] |= termios.CS8 | termios.CLOCAL | termios.CREAD
+            attrs[3] = 0
+            attrs[4] = BAUD_RATE_MAP[baudrate]
+            attrs[5] = BAUD_RATE_MAP[baudrate]
+            attrs[6][termios.VMIN] = 0
+            attrs[6][termios.VTIME] = 0
+            termios.tcsetattr(self.fd, termios.TCSANOW, attrs)
+            termios.tcflush(self.fd, termios.TCIOFLUSH)
+        except OSError as exc:
+            self.close()
+            raise RuntimeError(f"无法打开串口 {port}: {exc}") from exc
+
+    @property
+    def is_open(self):
+        return self.fd is not None
+
+    def reset_input_buffer(self):
+        if self.fd is not None:
+            termios.tcflush(self.fd, termios.TCIFLUSH)
+
+    def reset_output_buffer(self):
+        if self.fd is not None:
+            termios.tcflush(self.fd, termios.TCOFLUSH)
+
+    def write(self, data):
+        if self.fd is None:
+            raise OSError("串口未打开")
+
+        sent = 0
+        while sent < len(data):
+            try:
+                written = os.write(self.fd, data[sent:])
+            except BlockingIOError:
+                time.sleep(SERIAL_POLL_INTERVAL)
+                continue
+            if written <= 0:
+                raise OSError("串口写入返回 0 字节")
+            sent += written
+
+    def flush(self):
+        if self.fd is not None:
+            termios.tcdrain(self.fd)
+
+    def read_chunk(self, timeout, size=4096):
+        if self.fd is None:
+            return b""
+
+        ready, _, _ = select.select([self.fd], [], [], timeout)
+        if not ready:
+            return b""
+
+        try:
+            return os.read(self.fd, size)
+        except BlockingIOError:
+            return b""
+
+    def close(self):
+        if self.fd is None:
+            return
+
+        fd = self.fd
+        self.fd = None
+
+        if self._original_attrs is not None:
+            try:
+                termios.tcsetattr(fd, termios.TCSANOW, self._original_attrs)
+            except termios.error:
+                pass
+        os.close(fd)
+
+
+def read_serial_output(session, timeout, allow_disconnect=False):
+    """在给定时间窗口内读取 AT 响应，直到出现结束标记或超时。"""
+    deadline = time.time() + timeout
+    chunks = []
+    saw_terminal_line = False
+    last_data_time = None
+
+    while time.time() < deadline:
+        try:
+            chunk = session.read_chunk(timeout=min(SERIAL_READ_TIMEOUT, max(deadline - time.time(), 0)))
+        except OSError as exc:
+            if allow_disconnect and exc.errno in (errno.EIO, errno.ENODEV, errno.EBADF):
+                break
+            raise RuntimeError(f"读取串口响应失败: {exc}") from exc
+
+        if chunk:
+            chunks.append(chunk.decode(errors="ignore"))
+            last_data_time = time.time()
+            current_text = normalize_serial_output("".join(chunks))
+            if serial_response_complete(current_text):
+                saw_terminal_line = True
+            continue
+
+        if saw_terminal_line and last_data_time is not None and time.time() - last_data_time >= SERIAL_SETTLE_DELAY:
+            break
+
+        time.sleep(SERIAL_POLL_INTERVAL)
+
+    return normalize_serial_output("".join(chunks))
+
+
+def open_serial_session(port):
+    """打开 AT 串口会话，后续在同一连接里顺序发送多条命令。"""
+    ser = RawSerialSession(port=port, baudrate=DEFAULT_BAUD_RATE)
+    time.sleep(0.2)
+    ser.reset_input_buffer()
+    ser.reset_output_buffer()
+    return ser
+
+
+def execute_serial_step(ser, command, expect=None, timeout=3, allow_disconnect=False):
+    """在当前串口会话里发送一条 AT 命令并校验响应。"""
+    print(f"[AT] {command}")
+    try:
+        ser.reset_input_buffer()
+        ser.write((command + "\r").encode())
+        ser.flush()
+    except OSError as exc:
+        raise RuntimeError(f"AT 命令 `{command}` 发送失败: {exc}") from exc
+
+    response = read_serial_output(ser, timeout=timeout, allow_disconnect=allow_disconnect)
+
+    if response:
+        print(response)
+    else:
+        print("(无响应)")
+
+    if "ERROR" in response:
+        raise RuntimeError(f"AT 命令 `{command}` 执行失败: {response}")
+    if expect and expect not in response and not allow_disconnect:
+        raise RuntimeError(f"AT 命令 `{command}` 响应异常: {response or '空响应'}")
+    return response
+
+
+def synchronize_at_channel(ser):
+    """某些模组 AT 口在刚打开时需要先用 AT 做一次预热。"""
+    last_error = None
+
+    for attempt in range(1, AT_SYNC_RETRIES + 1):
+        try:
+            print(f"[INFO] 预热 AT 通道，第 {attempt} 次")
+            response = execute_serial_step(ser, "AT", expect="OK", timeout=AT_SYNC_TIMEOUT)
+            if "OK" in response:
+                return
+        except RuntimeError as exc:
+            last_error = exc
+            time.sleep(0.5)
+
+    if last_error is not None:
+        raise RuntimeError(
+            "AT 通道预热失败，请确认串口是否是 AT 命令口，例如 /dev/ttyUSB2"
+        ) from last_error
+    raise RuntimeError("AT 通道预热失败")
+
+
+def run_serial_steps(port, steps):
+    """在同一个串口会话里顺序执行多条 AT 命令。"""
+    ser = None
+
+    try:
+        ser = open_serial_session(port)
+        synchronize_at_channel(ser)
+        for step in steps:
+            execute_serial_step(
+                ser,
+                step["command"],
+                expect=step.get("expect"),
+                timeout=step.get("timeout", 3),
+                allow_disconnect=step.get("allow_disconnect", False),
+            )
+    finally:
+        if ser is not None and ser.is_open:
+            ser.close()
+
+def configure_rndis(port):
+    # 2. 用 Python 串口库在同一会话里顺序执行拨号相关 AT 命令。
+    """切换到 RNDIS 模式并触发模块重启。"""
+    if not wait_for_path(port, timeout=30):
+        raise RuntimeError(f"串口不存在: {port}")
+
+    print(f"[OK] 串口已打开: {port}")
+    run_serial_steps(
+        port,
+        [
+            {"command": "AT+CPIN?", "expect": "READY", "timeout": 4},
+            {"command": 'AT+QCFG="usbnet",3', "expect": "OK", "timeout": 5},
+            {"command": "AT+CFUN=1,1", "timeout": 4, "allow_disconnect": True},
+        ],
+    )
+
+
+def get_interfaces():
+    """列出当前系统中的接口，过滤明显无关的本地接口。"""
+    interfaces = []
+    try:
+        for name in os.listdir("/sys/class/net"):
+            if name in SKIP_INTERFACES or is_usb_gadget(name):
+                continue
+            interfaces.append(name)
+    except FileNotFoundError:
+        return []
+    return sorted(interfaces)
+
+
+def is_usb_gadget(iface):
+    """过滤 Jetson 自己暴露出去的 gadget 网卡。"""
+    sysfs_path = f"/sys/class/net/{iface}"
+    if not os.path.exists(sysfs_path):
+        return False
+    return "/gadget/" in os.path.realpath(sysfs_path)
+
+
+def is_usb_network_interface(iface):
+    """判断接口是否来自 USB 设备。"""
+    device_path = f"/sys/class/net/{iface}/device"
+    if not os.path.exists(device_path):
+        return False
+    real_path = os.path.realpath(device_path)
+    return "/usb" in real_path
+
+
+def get_ipv4_addrs():
+    """返回所有接口的 IPv4/CIDR 信息。"""
+    code, output = run_cmd(["ip", "-o", "-4", "addr", "show"], timeout=10)
+    if code != 0:
+        return {}
+
+    ipv4_addrs = {}
+    for line in output.splitlines():
+        parts = line.split()
+        if len(parts) >= 4:
+            iface = parts[1]
+            ipv4_addrs.setdefault(iface, []).append(parts[3])
+    return ipv4_addrs
+
+
+def get_ipv6_addrs():
+    """返回所有接口的 IPv6/CIDR 信息。"""
+    code, output = run_cmd(["ip", "-o", "-6", "addr", "show"], timeout=10)
+    if code != 0:
+        return {}
+
+    ipv6_addrs = {}
+    for line in output.splitlines():
+        parts = line.split()
+        if len(parts) >= 4:
+            iface = parts[1]
+            ipv6_addrs.setdefault(iface, []).append(parts[3])
+    return ipv6_addrs
+
+
+def interface_priority(iface):
+    if iface.startswith("wwan"):
+        return 0
+    if iface.startswith("enx"):
+        return 1
+    if iface.startswith("usb"):
+        return 2
+    return 10
+
+
+def list_usb_network_candidates(explicit_iface=None):
+    """列出拨号前可尝试的 USB 网卡候选项。
+
+    这里不靠固定网口名确认 5G 模组，只是在还没有 IP 的时候先缩小范围。
+    真正确认模组接口，会在 DHCP 之后根据 IP 网段判断。
+    """
+    candidates = []
+
+    for iface in get_interfaces():
+        if explicit_iface and iface != explicit_iface:
+            continue
+        if not is_usb_network_interface(iface):
+            continue
+        candidates.append((interface_priority(iface), iface))
+
+    if not candidates:
+        return []
+
+    candidates.sort()
+    return [iface for _, iface in candidates]
+
+
+def ip_in_subnet(ip_cidr, subnet):
+    """判断接口地址是否落在指定网段内。"""
+    try:
+        return ipaddress.ip_interface(ip_cidr).ip in ipaddress.ip_network(subnet, strict=False)
+    except ValueError:
+        return False
+
+
+def find_interface_by_subnet(modem_subnet, explicit_iface=None):
+    """拨号成功后，通过 IP 网段确认 5G 模组网卡。"""
+    candidates = []
+    for iface, addrs in get_ipv4_addrs().items():
+        if iface in SKIP_INTERFACES or is_usb_gadget(iface):
+            continue
+        if not is_usb_network_interface(iface):
+            continue
+        if explicit_iface and iface != explicit_iface:
+            continue
+
+        matched_addrs = [addr for addr in addrs if ip_in_subnet(addr, modem_subnet)]
+        if matched_addrs:
+            candidates.append((interface_priority(iface), iface, matched_addrs))
+
+    if not candidates:
+        return None, []
+
+    candidates.sort()
+    _, iface, matched_addrs = candidates[0]
+    return iface, matched_addrs
+
+
+def wait_for_usb_candidates(explicit_iface=None, timeout=90):
+    """等待模块枚举出 USB 网卡候选项。"""
+    deadline = time.time() + timeout
+    while time.time() < deadline:
+        candidates = list_usb_network_candidates(explicit_iface=explicit_iface)
+        if candidates:
+            return candidates
+        time.sleep(CHECK_INTERVAL)
+    return []
+
+
+def bring_interface_up(iface):
+    code, output = run_cmd(["ip", "link", "set", "dev", iface, "up"], timeout=10)
+    if code != 0:
+        raise RuntimeError(f"拉起网卡失败: {iface}\n{output}")
+
+
+def renew_dhcp(iface):
+    dhclient = shutil.which("dhclient")
+    udhcpc = shutil.which("udhcpc")
+
+    if dhclient:
+        print(f"[INFO] 使用 dhclient 为 {iface} 获取 IP")
+        code, output = run_cmd(["dhclient", "-1", "-v", iface], timeout=45)
+        return code == 0, output
+
+    if udhcpc:
+        print(f"[INFO] 使用 udhcpc 为 {iface} 获取 IP")
+        code, output = run_cmd(["udhcpc", "-n", "-q", "-i", iface], timeout=45)
+        return code == 0, output
+
+    return False, "系统中未找到 dhclient 或 udhcpc"
+
+
+def get_default_routes(iface):
+    code, output = run_cmd(["ip", "-o", "route", "show", "default", "dev", iface], timeout=10)
+    if code != 0:
+        return []
+    return [line.strip() for line in output.splitlines() if line.strip()]
+
+
+def resolve_gateway(iface, fallback_gateway):
+    for route in get_default_routes(iface):
+        tokens = route.split()
+        for index, token in enumerate(tokens[:-1]):
+            if token == "via":
+                gateway = tokens[index + 1]
+                print(f"[INFO] 从默认路由检测到 {iface} 网关: {gateway}")
+                return gateway
+
+    print(f"[INFO] 未从默认路由检测到 {iface} 网关，回退到 {fallback_gateway}")
+    return fallback_gateway
+
+
+def delete_default_routes(iface):
+    removed = 0
+
+    while True:
+        routes = get_default_routes(iface)
+        if not routes:
+            return removed
+
+        deleted_this_round = False
+        for route in routes:
+            cmd = ["ip", "route", "del", *route.split()]
+            code, output = run_cmd(cmd, timeout=10)
+            if code != 0:
+                code, output = run_cmd(["ip", "route", "del", "default", "dev", iface], timeout=10)
+                if code != 0:
+                    raise RuntimeError(f"删除默认路由失败: {iface}\n{output}")
+            removed += 1
+            deleted_this_round = True
+
+        if not deleted_this_round:
+            raise RuntimeError(f"未能删除 {iface} 的默认路由")
+
+
+def install_host_routes(iface, gateway, targets):
+    for target in dedupe_keep_order(targets):
+        cmd = ["ip", "route", "replace", f"{target}/32", "via", gateway, "dev", iface]
+        code, output = run_cmd(cmd, timeout=10)
+        if code != 0:
+            raise RuntimeError(f"添加主机路由失败: {target} via {gateway} dev {iface}\n{output}")
+
+        print(f"[OK] 已添加主机路由: {target}/32 via {gateway} dev {iface}")
+
+
+def enforce_route_policy(iface, fallback_gateway, route_targets):
+    gateway = resolve_gateway(iface, fallback_gateway)
+    removed = delete_default_routes(iface)
+    print(f"[OK] 已删除 {iface} 上的 {removed} 条默认路由")
+
+    if route_targets:
+        install_host_routes(iface, gateway, route_targets)
+    else:
+        print(f"[WARN] {iface} 未配置任何主机路由目标，5G 将不再承载公网流量")
+
+
+def ensure_ipv4(iface):
+    """为指定接口申请 IPv4 地址。"""
+    ipv4_addrs = get_ipv4_addrs().get(iface, [])
+    if ipv4_addrs:
+        return ipv4_addrs
+
+    bring_interface_up(iface)
+    ok, output = renew_dhcp(iface)
+    if output:
+        print(output)
+    if not ok:
+        return []
+
+    return get_ipv4_addrs().get(iface, [])
+
+
+def acquire_modem_interface(modem_subnet, explicit_iface=None):
+    """通过 DHCP + IP 网段识别真正的模组接口。"""
+    iface, matched_addrs = find_interface_by_subnet(
+        modem_subnet,
+        explicit_iface=explicit_iface,
+    )
+    if iface:
+        return iface, matched_addrs
+
+    candidates = list_usb_network_candidates(explicit_iface=explicit_iface)
+    if not candidates:
+        raise RuntimeError("未找到可尝试 DHCP 的 USB 网卡候选项")
+
+    print(f"[INFO] 当前 USB 网卡候选项: {', '.join(candidates)}")
+
+    for iface in candidates:
+        print(f"[INFO] 尝试为 {iface} 获取 IPv4")
+        ensure_ipv4(iface)
+
+        matched_iface, matched_addrs = find_interface_by_subnet(
+            modem_subnet,
+            explicit_iface=explicit_iface,
+        )
+        if matched_iface:
+            return matched_iface, matched_addrs
+
+    return None, []
+
+
+def print_interface_status(iface):
+    # 3. 拨号成功后，打印 ip/ifconfig，确认模组网口和地址。
+    print(f"[OK] 检测到 5G 网卡: {iface}")
+
+    code, output = run_cmd(["ip", "-4", "addr", "show", "dev", iface], timeout=10)
+    if code == 0 and output:
+        print(output)
+
+    if shutil.which("ifconfig"):
+        code, ifconfig_output = run_cmd(["ifconfig", iface], timeout=10)
+        if code == 0 and ifconfig_output:
+            print("\n===== ifconfig =====")
+            print(ifconfig_output)
+
+
+def save_interface_info(iface, output_file=DEFAULT_INFO_JSON):
+    """把网口名称、IPv4、IPv6 保存到 JSON 文件。"""
+    data = {
+        "interface": iface,
+        "ipv4": get_ipv4_addrs().get(iface, []),
+        "ipv6": get_ipv6_addrs().get(iface, []),
+    }
+
+    with open(output_file, "w", encoding="utf-8") as json_file:
+        json.dump(data, json_file, ensure_ascii=False, indent=2)
+
+    print(f"[OK] 网口信息已保存到 {output_file}")
+
+
+def ping_target(iface, target, count=3, timeout=15):
+    """通过指定网口 ping 一个目标。"""
+    code, output = run_cmd(
+        ["ping", "-I", iface, "-c", str(count), "-W", "3", target],
+        timeout=timeout,
+    )
+    return code == 0, output
+
+
+def print_ping_summary(output):
+    """只打印 ping 的关键结果。"""
+    for line in output.splitlines():
+        if "packets transmitted" in line or "rtt " in line or "Destination " in line:
+            print(line)
+
+
+def verify_connectivity(iface, gateway=DEFAULT_MODEM_GATEWAY, targets=DEFAULT_PUBLIC_TARGETS, retry_interval=3, max_wait=45):
+    # 4. 最后先 ping 模组网关，再重试公网连通性。
+    """先测模组网关，再轮询公网目标地址。"""
+    ok, output = ping_target(iface, gateway, count=3, timeout=15)
+    if ok:
+        print(f"[OK] {iface} 可到达模组网关 {gateway}")
+        print_ping_summary(output)
+    else:
+        print(f"[WARN] {iface} 无法到达模组网关 {gateway}")
+        if output:
+            print(output)
+        return False
+
+    deadline = time.time() + max_wait
+    attempt = 1
+    while True:
+        for target in targets:
+            ok, output = ping_target(iface, target, count=3, timeout=15)
+            if ok:
+                print(f"[OK] {iface} 可通过 {target}")
+                print_ping_summary(output)
+                return True
+
+            print(f"[WARN] 第 {attempt} 次 Ping {target} 失败")
+            if output:
+                print_ping_summary(output)
+
+        if time.time() >= deadline:
+            print(f"[WARN] {iface} 在 {max_wait} 秒内仍无法连通 {', '.join(targets)}")
+            return False
+
+        attempt += 1
+        time.sleep(retry_interval)
+
+
+def ping_via_interface(iface, targets=DEFAULT_PUBLIC_TARGETS):
+    """保留原调用点，内部走完整连通性检查。"""
+    return verify_connectivity(iface, targets=targets)
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(description="RM520N-GL RNDIS 自动拨号脚本")
+    parser.add_argument(
+        "--serial-port",
+        default=DEFAULT_SERIAL_PORT,
+        help=f"AT 串口路径，默认 {DEFAULT_SERIAL_PORT}",
+    )
+    parser.add_argument(
+        "--interface",
+        help="指定期望的 5G 网卡名，例如 eth0",
+    )
+    parser.add_argument(
+        "--modem-subnet",
+        default=DEFAULT_MODEM_SUBNET,
+        help=f"拨号成功后用于识别模组接口的 IPv4 网段，默认 {DEFAULT_MODEM_SUBNET}",
+    )
+    parser.add_argument(
+        "--gateway",
+        type=parse_ipv4_address,
+        default=DEFAULT_MODEM_GATEWAY,
+        help=f"5G 模组网关地址，默认 {DEFAULT_MODEM_GATEWAY}",
+    )
+    parser.add_argument(
+        "--skip-dhcp",
+        action="store_true",
+        help="只等待 USB 网卡出现，不主动申请 IPv4",
+    )
+    parser.add_argument(
+        "--remove-default-route",
+        action="store_true",
+        help="拨号成功后删除 5G 接口上的默认路由，只保留显式主机路由",
+    )
+    parser.add_argument(
+        "--route-target",
+        action="append",
+        default=[],
+        type=parse_ipv4_address,
+        help="拨号完成后通过 5G 接口保留的 IPv4 主机路由目标，可重复传入",
+    )
+    return parser.parse_args()
+
+
+def main():
+    args = parse_args()
+    require_root()
+    require_commands()
+
+    print("===== RM520N-GL RNDIS 自动拨号 =====")
+    print(f"[INFO] 目标模组网段: {args.modem_subnet}")
+
+    #1.检测 lsusb，确认是否识别到模块
+    present, detail = usb_device_present()
+    if not present:
+        print(f"[FAIL] 未检测到模块 USB 设备 {USB_ID}")
+        if detail:
+            print(detail)
+        sys.exit(1)
+
+    print(f"[OK] 检测到 USB 设备: {detail}")
+    print(f"[INFO] 使用 AT 口: {args.serial_port}")
+
+    #2.进行 Python 串口拨号
+    try:
+        configure_rndis(args.serial_port)
+
+        print("[INFO] 已发送 AT+CFUN=1,1，等待模块重启")
+        disappeared, _ = wait_for_usb_device(expected_present=False, timeout=25)
+        if disappeared:
+            print("[OK] 模块已下线，继续等待重新枚举")
+        else:
+            print("[WARN] 未观察到模块下线，继续等待重新枚举")
+
+        reappeared, detail = wait_for_usb_device(expected_present=True, timeout=90)
+        if not reappeared:
+            print(f"[FAIL] 模块重启后未重新枚举: {USB_ID}")
+            sys.exit(1)
+
+        print(f"[OK] 模块已重新枚举: {detail}")
+
+        candidates = wait_for_usb_candidates(explicit_iface=args.interface, timeout=90)
+        if not candidates:
+            print("[FAIL] 未检测到 5G 模组枚举出的 USB 网卡")
+            sys.exit(1)
+
+        if args.skip_dhcp:
+            print(f"[INFO] 当前 USB 网卡候选项: {', '.join(candidates)}")
+            iface, ipv4_addrs = find_interface_by_subnet(
+                args.modem_subnet,
+                explicit_iface=args.interface,
+            )
+            if not iface:
+                print(f"[WARN] 当前还没有接口拿到目标网段 {args.modem_subnet} 的地址")
+                sys.exit(1)
+        else:
+            iface, ipv4_addrs = acquire_modem_interface(
+                args.modem_subnet,
+                explicit_iface=args.interface,
+            )
+            if not iface:
+                print(f"[FAIL] 未找到落在目标网段 {args.modem_subnet} 内的模组接口")
+                sys.exit(1)
+
+        print_interface_status(iface)
+
+        if ipv4_addrs:
+            for addr in ipv4_addrs:
+                print(f"[OK] {iface} 已获取 IPv4: {addr}")
+            save_interface_info(iface)
+            route_targets = dedupe_keep_order(args.route_target)
+            if args.remove_default_route:
+                enforce_route_policy(iface, args.gateway, route_targets)
+
+            connectivity_targets = route_targets or list(DEFAULT_PUBLIC_TARGETS)
+            ping_via_interface(iface, targets=connectivity_targets)
+            print(f"[DONE] RNDIS 拨号完成，可执行: sudo python3 speed_test.py {iface}")
+            return
+
+        print(f"[WARN] {iface} 已出现，但还没有 IPv4 地址")
+        print(f"[INFO] 可手动检查: ip addr show {iface}")
+        sys.exit(1)
+    except (RuntimeError, subprocess.TimeoutExpired) as exc:
+        print(f"[FAIL] {exc}")
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()

scripts/boot/robot-boot.env

@@ -0,0 +1,33 @@
+# Boot-time settings for the robot-side autostart chain.
+# Override machine-specific values in robot-boot.env.local.
+
+BLITZ_BOOT_DELAY_SEC="30"
+BLITZ_LOG_FILE="/var/log/blitz-robot/startup.log"
+BLITZ_RUNTIME_DIR="/run/blitz-robot"
+
+BLITZ_5G_DIAL_DIR="${OMNISOCKETGO_ROOT}/scripts/boot"
+BLITZ_5G_SERIAL_PORT="/dev/ttyUSB2"
+BLITZ_5G_INTERFACE=""
+BLITZ_5G_MODEM_SUBNET="192.168.224.0/22"
+BLITZ_5G_GATEWAY="192.168.225.1"
+BLITZ_5G_SKIP_DHCP="0"
+BLITZ_5G_REMOVE_DEFAULT_ROUTE="1"
+BLITZ_5G_ROUTE_TARGETS="106.55.173.235"
+BLITZ_5G_INFO_JSON="${OMNISOCKETGO_ROOT}/scripts/boot/modem_network_info.json"
+BLITZ_5G_SERIAL_WAIT_SEC="60"
+BLITZ_5G_ROUTE_WAIT_SEC="30"
+
+# Leave empty to fall back to the host part of ROBOT_SIDE_OMNISOCKET_SERVER_ADDR.
+BLITZ_TIME_SERVER_IP="81.70.156.140"
+
+BLITZ_ROS_USER="nvidia"
+BLITZ_ROS_SOCKET_WAIT_SEC="20"
+BLITZ_WATCHDOG_INTERVAL_SEC="5"
+BLITZ_HEALTH_STALE_SEC="15"
+BLITZ_OMNID_THREAD_HEARTBEAT_TIMEOUT_SEC="15"
+BLITZ_NETWORK_FAIL_THRESHOLD="3"
+BLITZ_NETWORK_RECOVERY_COOLDOWN_SEC="30"
+BLITZ_WATCHDOG_ALLOW_FAULT_INJECTION="0"
+
+# Boot units run b_side_omnid as root directly, so nested sudo must stay off.
+B_SIDE_OMNID_USE_SUDO="0"

scripts/boot/start-b-side-omnid-service.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+STEP="b-side-omnid"
+
+blitz_load_boot_env
+
+blitz_require_executable "${OMNISOCKETGO_ROOT}/bin/b_side_omnid" "${STEP}"
+
+export OMNI_BOOT_MODE="1"
+export B_SIDE_OMNID_USE_SUDO="0"
+
+blitz_log "${STEP}" "start" "start" "exec bash ${OMNISOCKETGO_ROOT}/scripts/dev/start-b-side-omnid.sh" 0
+exec bash "${OMNISOCKETGO_ROOT}/scripts/dev/start-b-side-omnid.sh"

scripts/boot/start-ros-receiver-service.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+STEP="ros-receiver"
+
+blitz_load_boot_env
+
+blitz_require_file "/opt/ros/${ROS_DISTRO}/setup.bash" "${STEP}"
+blitz_require_file "${ROS_CONTROL_PY_DIR}/install/setup.bash" "${STEP}"
+
+export OMNI_BOOT_MODE="1"
+blitz_log "${STEP}" "start" "start" "exec bash ${OMNISOCKETGO_ROOT}/scripts/dev/start-ros-receiver.sh" 0
+exec bash "${OMNISOCKETGO_ROOT}/scripts/dev/start-ros-receiver.sh"

scripts/boot/systemd/blitz-5g-dial.service.in

@@ -0,0 +1,14 @@
+[Unit]
+Description=Blitz robot 5G dial
+After=blitz-boot-gate.service
+Requires=blitz-boot-gate.service
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/bin/bash @OMNISOCKETGO_ROOT@/scripts/boot/5g-dial.sh
+StandardOutput=append:@BLITZ_LOG_FILE@
+StandardError=append:@BLITZ_LOG_FILE@
+
+[Install]
+WantedBy=blitz-robot.target

scripts/boot/systemd/blitz-b-side-omnid.service.in

@@ -0,0 +1,16 @@
+[Unit]
+Description=Blitz robot b-side omnid
+After=blitz-5g-dial.service blitz-ros-receiver.service
+Wants=blitz-5g-dial.service blitz-ros-receiver.service
+
+[Service]
+Type=simple
+ExecStartPre=/bin/bash @OMNISOCKETGO_ROOT@/scripts/boot/prepare-runtime-dir.sh
+ExecStart=/bin/bash @OMNISOCKETGO_ROOT@/scripts/boot/start-b-side-omnid-service.sh
+Restart=always
+RestartSec=2
+StandardOutput=append:@BLITZ_LOG_FILE@
+StandardError=append:@BLITZ_LOG_FILE@
+
+[Install]
+WantedBy=blitz-robot.target

scripts/boot/systemd/blitz-boot-gate.service.in

@@ -0,0 +1,14 @@
+[Unit]
+Description=Blitz robot boot gate
+After=multi-user.target network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/bin/bash @OMNISOCKETGO_ROOT@/scripts/boot/boot-gate.sh
+StandardOutput=append:@BLITZ_LOG_FILE@
+StandardError=append:@BLITZ_LOG_FILE@
+
+[Install]
+WantedBy=blitz-robot.target

scripts/boot/systemd/blitz-robot.target.in

@@ -0,0 +1,11 @@
+[Unit]
+Description=Blitz robot boot chain
+Wants=blitz-boot-gate.service
+Wants=blitz-5g-dial.service
+Wants=blitz-ros-receiver.service
+Wants=blitz-b-side-omnid.service
+Wants=blitz-watchdog.service
+After=multi-user.target
+
+[Install]
+WantedBy=multi-user.target

scripts/boot/systemd/blitz-ros-receiver.service.in

@@ -0,0 +1,19 @@
+[Unit]
+Description=Blitz robot ROS receiver
+After=blitz-5g-dial.service
+Wants=blitz-5g-dial.service
+
+[Service]
+Type=simple
+User=@BLITZ_ROS_USER@
+PermissionsStartOnly=true
+ExecStartPre=/bin/bash @OMNISOCKETGO_ROOT@/scripts/boot/prepare-runtime-dir.sh
+ExecStart=/bin/bash @OMNISOCKETGO_ROOT@/scripts/boot/start-ros-receiver-service.sh
+ExecStartPost=/bin/bash @OMNISOCKETGO_ROOT@/scripts/boot/wait-for-unix-socket.sh --step ros-receiver
+Restart=always
+RestartSec=2
+StandardOutput=append:@BLITZ_LOG_FILE@
+StandardError=append:@BLITZ_LOG_FILE@
+
+[Install]
+WantedBy=blitz-robot.target

scripts/boot/systemd/blitz-watchdog.service.in

@@ -0,0 +1,16 @@
+[Unit]
+Description=Blitz robot health watchdog
+After=blitz-b-side-omnid.service blitz-ros-receiver.service
+Wants=blitz-b-side-omnid.service blitz-ros-receiver.service
+
+[Service]
+Type=simple
+ExecStartPre=/bin/bash @OMNISOCKETGO_ROOT@/scripts/boot/prepare-runtime-dir.sh
+ExecStart=/bin/bash @OMNISOCKETGO_ROOT@/scripts/boot/blitz-watchdog.sh
+Restart=always
+RestartSec=5
+StandardOutput=append:@BLITZ_LOG_FILE@
+StandardError=append:@BLITZ_LOG_FILE@
+
+[Install]
+WantedBy=blitz-robot.target

scripts/boot/wait-for-unix-socket.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+STEP="ros-receiver"
+SOCKET_PATH=""
+TIMEOUT_SEC=""
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --path)
+      SOCKET_PATH="$2"
+      shift 2
+      ;;
+    --timeout)
+      TIMEOUT_SEC="$2"
+      shift 2
+      ;;
+    --step)
+      STEP="$2"
+      shift 2
+      ;;
+    *)
+      blitz_log "${STEP}" "wait-socket-arg" "failure" "unknown argument: $1" 2
+      exit 2
+      ;;
+  esac
+done
+
+blitz_load_boot_env
+
+SOCKET_PATH="${SOCKET_PATH:-${ROBOT_RECEIVER_LOCAL_SOCKET_PATH}}"
+TIMEOUT_SEC="${TIMEOUT_SEC:-${BLITZ_ROS_SOCKET_WAIT_SEC}}"
+
+blitz_log "${STEP}" "wait-socket" "start" "path=${SOCKET_PATH} timeout_sec=${TIMEOUT_SEC}" 0
+
+for (( waited=0; waited< TIMEOUT_SEC; waited++ )); do
+  if [[ -S "${SOCKET_PATH}" ]]; then
+    blitz_log "${STEP}" "wait-socket" "success" "path=${SOCKET_PATH} waited_sec=${waited}" 0
+    exit 0
+  fi
+  sleep 1
+done
+
+blitz_log "${STEP}" "wait-socket" "failure" "path=${SOCKET_PATH} timeout_sec=${TIMEOUT_SEC}" 1
+exit 1

scripts/dev/README.md

@@ -0,0 +1,156 @@
+# Dev Startup Scripts
+
+This directory lives inside the `OmniSocketGo` repo and acts as the main launch entry for the whole local setup.
+
+Default layout:
+
+```text
+~/Documents/
+  OmniSocketGo/
+    scripts/dev/
+  robot-command-center/
+```
+
+The scripts assume:
+
+- `OmniSocketGo` is the current repo
+- `robot-command-center` is a sibling directory next to it
+
+If your `robot-command-center` is elsewhere, set `ROBOT_COMMAND_CENTER_ROOT` in `robot-remote.env.local`.
+`start-backend.sh` and `start-frontend.sh` need that repo; `start-ros-receiver.sh` and `start-b-side-omnid.sh` do not.
+
+## Files
+
+- `robot-remote.env`: shared defaults for backend, frontend, ROS, and `b_side_omnid`
+- `robot-remote.env.local`: optional local override file loaded after `robot-remote.env`
+- `load-env.sh`: loads the shared environment into the current shell
+- `apply-camera-controls.sh`: applies the camera preset before `b_side_omnid` starts
+- `start-backend.sh`: starts Django ASGI with `uvicorn`
+- `log-network-summary.py`: polls the backend `network/latest` API and appends compact JSONL snapshots
+- `start-frontend.sh`: starts the Vite dev server
+- `start-ros-receiver.sh`: starts the ROS2 `udp_teleop_bridge` receiver
+- `start-b-side-omnid.sh`: applies camera controls, then starts `./bin/b_side_omnid` and uses `sudo -E` by default
+- `start-dev-tmux.sh`: optional one-command `tmux` launcher for all four processes
+
+## Usage
+
+Run these from the `OmniSocketGo` repo root:
+
+```bash
+bash scripts/dev/start-backend.sh
+bash scripts/dev/start-frontend.sh
+bash scripts/dev/start-ros-receiver.sh
+bash scripts/dev/start-b-side-omnid.sh
+```
+
+If you prefer one command and use `tmux`:
+
+```bash
+bash scripts/dev/start-dev-tmux.sh
+```
+
+If you only want the shared environment for manual commands:
+
+```bash
+source scripts/dev/load-env.sh
+```
+
+When you launch via `start-*.sh`, you do not need to manually `export` the variables from
+`robot-remote.env` or `robot-remote.env.local`. `load-env.sh` loads those files with `set -a`,
+so the variables are exported automatically for the child process. Manual `export` is only needed
+if you bypass these scripts and start binaries directly from a clean shell.
+
+## Customizing
+
+Edit `scripts/dev/robot-remote.env` for shared changes such as:
+
+- `ROBOT_COMMAND_CENTER_ROOT`
+- `CONTROL_SIDE_OMNISOCKET_SERVER_ADDR`
+- `CONTROL_SIDE_OMNISOCKET_RELAY_VIA`
+- `ROBOT_SIDE_OMNISOCKET_SERVER_ADDR`
+- `ROBOT_SIDE_OMNISOCKET_RELAY_VIA`
+- `VITE_API_BASE_URL`
+- `OMNI_CAMERA_DEVICE`
+- `OMNI_CAMERA_PROFILE`
+- `OMNI_CAMERA_BRIGHTNESS`
+- `OMNI_CAMERA_CUSTOM_CTRL`
+- `OMNI_CAMERA_VERIFY`
+- `OMNI_VIDEO_PEER_ID`
+- `OMNI_CONTROL_PEER_ID`
+- `OMNI_VIDEO_SOFT_BACKPRESSURE_SEGMENTS`
+- `OMNI_VIDEO_HARD_BACKPRESSURE_SEGMENTS`
+- `OMNI_VIDEO_HARD_BACKPRESSURE_HOLD_MS`
+- `OMNI_CONTROL_SERVER_IDLE_RECONNECT_MS`
+- `OMNI_VIDEO_MAX_FRAME_AGE_MS`
+- `OMNISOCKET_TELEMETRY_PEER_ID`
+- `OMNISOCKET_TELEMETRY_INTERVAL_MS`
+- `OMNISOCKET_TELEMETRY_STALE_AFTER_MS`
+- `OMNI_NETWORK_SUMMARY_LOG_ENABLED`
+- `OMNI_NETWORK_SUMMARY_LOG_PATH`
+- `OMNI_NETWORK_SUMMARY_LOG_INTERVAL_MS`
+
+Camera presets use `v4l2-ctl` from `v4l-utils` on the robot side.
+
+Role mapping:
+
+- `start-backend.sh` uses the `CONTROL_SIDE_*` address pair
+- `start-b-side-omnid.sh` uses the `ROBOT_SIDE_*` address pair
+- `start-b-side-omnid.sh` also applies the `OMNI_CAMERA_*` preset before the daemon opens the camera
+- `start-ros-receiver.sh` defaults to the robot-side address pair, but with `transport=unix_dgram` it usually does not need the server address
+
+New repair knobs:
+
+- `OMNI_VIDEO_SOFT_BACKPRESSURE_SEGMENTS`, `OMNI_VIDEO_HARD_BACKPRESSURE_SEGMENTS`, and `OMNI_VIDEO_HARD_BACKPRESSURE_HOLD_MS` are used by `b_side_omnid`
+- `OMNI_CONTROL_SERVER_IDLE_RECONNECT_MS` is used by `b_side_omnid`
+- `OMNI_VIDEO_MAX_FRAME_AGE_MS` is used by `start-backend.sh` on the A-side backend, not by `b_side_omnid`
+- `OMNISOCKET_TELEMETRY_INTERVAL_MS` and `OMNISOCKET_TELEMETRY_STALE_AFTER_MS` tune the backend's D-side telemetry freshness window
+- `OMNI_NETWORK_SUMMARY_LOG_*` controls the A-side JSONL summary logger that polls `GET /api/network/latest/`
+
+Default long-run network logging:
+
+- A-side starts a compact JSONL logger by default at `${OMNISOCKETGO_ROOT}/logs/a-network-summary.jsonl`
+- The default A-side polling interval is `2000 ms`
+- For D-side long runs, prefer:
+
+```bash
+./bin/kcpserver -listen 0.0.0.0:10909 \
+  -telemetry-peer peer-a-telemetry \
+  -telemetry-interval 1000ms \
+  -kcp-session-stats-log logs/d-kcp-stats.jsonl \
+  -kcp-session-stats-interval 1000ms
+```
+
+- Keep `-latency-log` and `-kcp-ts-debug-log` off by default for multi-hour runs
+- Do not continuously redirect relay `C` stderr to a file unless you are reproducing a short issue window
+
+Put machine-specific overrides into `scripts/dev/robot-remote.env.local`. Example:
+
+```bash
+ROBOT_COMMAND_CENTER_ROOT="$HOME/Documents/robot-command-center"
+OMNI_CAMERA_DEVICE="/dev/video30"
+B_SIDE_OMNID_USE_SUDO="0"
+OMNI_NETWORK_SUMMARY_LOG_INTERVAL_MS="5000"
+```
+
+Default camera behavior is the `night` preset:
+
+```bash
+OMNI_CAMERA_PROFILE="night"
+# Optional per-machine tweak:
+OMNI_CAMERA_BRIGHTNESS="8"
+```
+
+To switch to a daytime preset with brightness only:
+
+```bash
+OMNI_CAMERA_PROFILE="day"
+OMNI_CAMERA_BRIGHTNESS="8"
+```
+
+To send the raw `v4l2-ctl --set-ctrl=...` payload yourself:
+
+```bash
+OMNI_CAMERA_PROFILE="custom"
+OMNI_CAMERA_CUSTOM_CTRL="brightness=8,auto_exposure=1,exposure_time_absolute=800,gain=64"
+OMNI_CAMERA_VERIFY="1"
+```

scripts/dev/apply-camera-controls.sh

@@ -0,0 +1,111 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/load-env.sh"
+
+camera_device="${OMNI_CAMERA_DEVICE}"
+camera_profile="${OMNI_CAMERA_PROFILE}"
+camera_brightness="${OMNI_CAMERA_BRIGHTNESS}"
+camera_custom_ctrl="${OMNI_CAMERA_CUSTOM_CTRL}"
+camera_verify="${OMNI_CAMERA_VERIFY}"
+
+is_truthy() {
+  case "${1:-0}" in
+    1|true|TRUE|yes|YES|on|ON)
+      return 0
+      ;;
+    *)
+      return 1
+      ;;
+  esac
+}
+
+require_v4l2_ctl() {
+  if command -v v4l2-ctl >/dev/null 2>&1; then
+    return 0
+  fi
+
+  echo "Missing required command: v4l2-ctl. Install v4l-utils on the robot side before starting b_side_omnid." >&2
+  exit 1
+}
+
+run_v4l2_ctl() {
+  v4l2-ctl -d "${camera_device}" "$@"
+}
+
+set_ctrl() {
+  local ctrl="$1"
+
+  echo "[camera-controls] set ${camera_device} ${ctrl}"
+  run_v4l2_ctl "--set-ctrl=${ctrl}"
+}
+
+verify_ctrl() {
+  local ctrl="$1"
+
+  echo "[camera-controls] verify ${camera_device} ${ctrl}"
+  run_v4l2_ctl "--get-ctrl=${ctrl}"
+}
+
+needs_v4l2_ctl=0
+
+case "${camera_profile}" in
+  night)
+    needs_v4l2_ctl=1
+    ;;
+  day)
+    if [[ -n "${camera_brightness}" ]]; then
+      needs_v4l2_ctl=1
+    fi
+    ;;
+  custom)
+    if [[ -z "${camera_custom_ctrl}" ]]; then
+      echo "OMNI_CAMERA_CUSTOM_CTRL must be non-empty when OMNI_CAMERA_PROFILE=custom." >&2
+      exit 1
+    fi
+    needs_v4l2_ctl=1
+    ;;
+  *)
+    echo "Unsupported OMNI_CAMERA_PROFILE: ${camera_profile}. Expected one of: night, day, custom." >&2
+    exit 1
+    ;;
+esac
+
+if is_truthy "${camera_verify}"; then
+  needs_v4l2_ctl=1
+fi
+
+if [[ "${needs_v4l2_ctl}" == "0" ]]; then
+  echo "[camera-controls] profile=${camera_profile}; no camera controls requested"
+  exit 0
+fi
+
+require_v4l2_ctl
+
+case "${camera_profile}" in
+  night)
+    set_ctrl "auto_exposure=1"
+    set_ctrl "exposure_time_absolute=800"
+    set_ctrl "gain=64"
+    if [[ -n "${camera_brightness}" ]]; then
+      set_ctrl "brightness=${camera_brightness}"
+    fi
+    ;;
+  day)
+    if [[ -n "${camera_brightness}" ]]; then
+      set_ctrl "brightness=${camera_brightness}"
+    fi
+    ;;
+  custom)
+    set_ctrl "${camera_custom_ctrl}"
+    ;;
+esac
+
+if is_truthy "${camera_verify}"; then
+  verify_ctrl "auto_exposure"
+  verify_ctrl "exposure_time_absolute"
+  verify_ctrl "gain"
+  verify_ctrl "brightness"
+fi

scripts/dev/load-env.sh

@@ -0,0 +1,136 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+DEFAULT_OMNISOCKETGO_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
+
+die() {
+  echo "$*" >&2
+  return 1 2>/dev/null || exit 1
+}
+
+is_omnisocketgo_root() {
+  local dir="$1"
+  [[ -f "${dir}/Makefile" && -f "${dir}/cmd/b_side_omnid.c" && -d "${dir}/ros-control-py" ]]
+}
+
+is_robot_command_center_root() {
+  local dir="$1"
+  [[ -f "${dir}/backend/config/asgi.py" && -f "${dir}/frontend/package.json" ]]
+}
+
+require_robot_command_center_root() {
+  if ! is_robot_command_center_root "${ROBOT_COMMAND_CENTER_ROOT}"; then
+    die "ROBOT_COMMAND_CENTER_ROOT must point to the robot-command-center repo root. Current value: ${ROBOT_COMMAND_CENTER_ROOT}. Set it in ${SCRIPT_DIR}/robot-remote.env.local if needed."
+  fi
+}
+
+export OMNISOCKETGO_ROOT="${OMNISOCKETGO_ROOT:-${DEFAULT_OMNISOCKETGO_ROOT}}"
+
+omni_camera_device_was_set=0
+omni_camera_profile_was_set=0
+omni_camera_brightness_was_set=0
+omni_camera_custom_ctrl_was_set=0
+omni_camera_verify_was_set=0
+
+if [[ "${OMNI_CAMERA_DEVICE+x}" == "x" ]]; then
+  omni_camera_device_was_set=1
+  preserved_omni_camera_device="${OMNI_CAMERA_DEVICE}"
+fi
+if [[ "${OMNI_CAMERA_PROFILE+x}" == "x" ]]; then
+  omni_camera_profile_was_set=1
+  preserved_omni_camera_profile="${OMNI_CAMERA_PROFILE}"
+fi
+if [[ "${OMNI_CAMERA_BRIGHTNESS+x}" == "x" ]]; then
+  omni_camera_brightness_was_set=1
+  preserved_omni_camera_brightness="${OMNI_CAMERA_BRIGHTNESS}"
+fi
+if [[ "${OMNI_CAMERA_CUSTOM_CTRL+x}" == "x" ]]; then
+  omni_camera_custom_ctrl_was_set=1
+  preserved_omni_camera_custom_ctrl="${OMNI_CAMERA_CUSTOM_CTRL}"
+fi
+if [[ "${OMNI_CAMERA_VERIFY+x}" == "x" ]]; then
+  omni_camera_verify_was_set=1
+  preserved_omni_camera_verify="${OMNI_CAMERA_VERIFY}"
+fi
+
+ENV_FILES=(
+  "${SCRIPT_DIR}/robot-remote.env"
+  "${SCRIPT_DIR}/robot-remote.env.local"
+)
+
+for env_file in "${ENV_FILES[@]}"; do
+  if [[ -f "${env_file}" ]]; then
+    set -a
+    # shellcheck disable=SC1090
+    source "${env_file}"
+    set +a
+  fi
+done
+
+if [[ "${omni_camera_device_was_set}" == "1" ]]; then
+  export OMNI_CAMERA_DEVICE="${preserved_omni_camera_device}"
+fi
+if [[ "${omni_camera_profile_was_set}" == "1" ]]; then
+  export OMNI_CAMERA_PROFILE="${preserved_omni_camera_profile}"
+fi
+if [[ "${omni_camera_brightness_was_set}" == "1" ]]; then
+  export OMNI_CAMERA_BRIGHTNESS="${preserved_omni_camera_brightness}"
+fi
+if [[ "${omni_camera_custom_ctrl_was_set}" == "1" ]]; then
+  export OMNI_CAMERA_CUSTOM_CTRL="${preserved_omni_camera_custom_ctrl}"
+fi
+if [[ "${omni_camera_verify_was_set}" == "1" ]]; then
+  export OMNI_CAMERA_VERIFY="${preserved_omni_camera_verify}"
+fi
+
+export OMNISOCKETGO_ROOT="${OMNISOCKETGO_ROOT:-${DEFAULT_OMNISOCKETGO_ROOT}}"
+export ROBOT_COMMAND_CENTER_ROOT="${ROBOT_COMMAND_CENTER_ROOT:-$(dirname "${OMNISOCKETGO_ROOT}")/robot-command-center}"
+
+if ! is_omnisocketgo_root "${OMNISOCKETGO_ROOT}"; then
+  die "OMNISOCKETGO_ROOT must point to the OmniSocketGo repo root. Current value: ${OMNISOCKETGO_ROOT}"
+fi
+
+export BACKEND_DIR="${BACKEND_DIR:-${ROBOT_COMMAND_CENTER_ROOT}/backend}"
+export FRONTEND_DIR="${FRONTEND_DIR:-${ROBOT_COMMAND_CENTER_ROOT}/frontend}"
+export ROS_CONTROL_PY_DIR="${ROS_CONTROL_PY_DIR:-${OMNISOCKETGO_ROOT}/ros-control-py}"
+export PYTHON3_BIN="${PYTHON3_BIN:-python3}"
+export PYTHON_VENV_PATH="${PYTHON_VENV_PATH:-${OMNISOCKETGO_ROOT}/.venv}"
+export BACKEND_HOST="${BACKEND_HOST:-0.0.0.0}"
+export BACKEND_PORT="${BACKEND_PORT:-8001}"
+export FRONTEND_HOST="${FRONTEND_HOST:-0.0.0.0}"
+export FRONTEND_PORT="${FRONTEND_PORT:-5173}"
+export OMNISOCKET_TELEMETRY_PEER_ID="${OMNISOCKET_TELEMETRY_PEER_ID:-peer-a-telemetry}"
+export OMNISOCKET_TELEMETRY_INTERVAL_MS="${OMNISOCKET_TELEMETRY_INTERVAL_MS:-1000}"
+export OMNISOCKET_TELEMETRY_STALE_AFTER_MS="${OMNISOCKET_TELEMETRY_STALE_AFTER_MS:-3000}"
+export OMNI_NETWORK_SUMMARY_LOG_ENABLED="${OMNI_NETWORK_SUMMARY_LOG_ENABLED:-1}"
+export OMNI_NETWORK_SUMMARY_LOG_PATH="${OMNI_NETWORK_SUMMARY_LOG_PATH:-${OMNISOCKETGO_ROOT}/logs/a-network-summary.jsonl}"
+export OMNI_NETWORK_SUMMARY_LOG_INTERVAL_MS="${OMNI_NETWORK_SUMMARY_LOG_INTERVAL_MS:-2000}"
+export OMNI_NETWORK_SUMMARY_LOG_REQUEST_TIMEOUT_SEC="${OMNI_NETWORK_SUMMARY_LOG_REQUEST_TIMEOUT_SEC:-3}"
+export CONTROL_SIDE_OMNISOCKET_SERVER_ADDR="${CONTROL_SIDE_OMNISOCKET_SERVER_ADDR:-}"
+export CONTROL_SIDE_OMNISOCKET_RELAY_VIA="${CONTROL_SIDE_OMNISOCKET_RELAY_VIA:-}"
+export ROBOT_SIDE_OMNISOCKET_SERVER_ADDR="${ROBOT_SIDE_OMNISOCKET_SERVER_ADDR:-}"
+export ROBOT_SIDE_OMNISOCKET_RELAY_VIA="${ROBOT_SIDE_OMNISOCKET_RELAY_VIA:-}"
+export ROS_DISTRO="${ROS_DISTRO:-jazzy}"
+export ROBOT_RECEIVER_TRANSPORT="${ROBOT_RECEIVER_TRANSPORT:-unix_dgram}"
+export ROBOT_RECEIVER_SERVER_ADDR="${ROBOT_RECEIVER_SERVER_ADDR:-${ROBOT_SIDE_OMNISOCKET_SERVER_ADDR:-}}"
+export ROBOT_RECEIVER_RELAY_VIA="${ROBOT_RECEIVER_RELAY_VIA:-${ROBOT_SIDE_OMNISOCKET_RELAY_VIA:-}}"
+export ROBOT_RECEIVER_PEER_ID="${ROBOT_RECEIVER_PEER_ID:-ros-bridge-ctrl}"
+export ROBOT_RECEIVER_EXPECTED_SENDER="${ROBOT_RECEIVER_EXPECTED_SENDER:-}"
+export ROBOT_RECEIVER_LOCAL_SOCKET_PATH="${ROBOT_RECEIVER_LOCAL_SOCKET_PATH:-/tmp/omnisocket-b-side-cmd.sock}"
+export ROBOT_RECEIVER_OUTPUT_TOPIC="${ROBOT_RECEIVER_OUTPUT_TOPIC:-/hric/robot/cmd_vel}"
+export ROBOT_RECEIVER_FRAME_ID="${ROBOT_RECEIVER_FRAME_ID:-pelvis}"
+export ROBOT_RECEIVER_WATCHDOG_TIMEOUT="${ROBOT_RECEIVER_WATCHDOG_TIMEOUT:-0.5}"
+export ROBOT_RECEIVER_PUBLISH_RATE_HZ="${ROBOT_RECEIVER_PUBLISH_RATE_HZ:-100.0}"
+export OMNI_CAMERA_DEVICE="${OMNI_CAMERA_DEVICE:-/dev/video0}"
+export OMNI_CAMERA_PROFILE="${OMNI_CAMERA_PROFILE:-night}"
+export OMNI_CAMERA_BRIGHTNESS="${OMNI_CAMERA_BRIGHTNESS:-}"
+export OMNI_CAMERA_CUSTOM_CTRL="${OMNI_CAMERA_CUSTOM_CTRL:-}"
+export OMNI_CAMERA_VERIFY="${OMNI_CAMERA_VERIFY:-0}"
+export OMNI_GPSD_HOST="${OMNI_GPSD_HOST:-127.0.0.1}"
+export OMNI_VIDEO_SERVER_ADDR="${OMNI_VIDEO_SERVER_ADDR:-${ROBOT_SIDE_OMNISOCKET_SERVER_ADDR:-}}"
+export OMNI_VIDEO_RELAY_VIA="${OMNI_VIDEO_RELAY_VIA:-${ROBOT_SIDE_OMNISOCKET_RELAY_VIA:-}}"
+export OMNI_CONTROL_SERVER_ADDR="${OMNI_CONTROL_SERVER_ADDR:-${ROBOT_SIDE_OMNISOCKET_SERVER_ADDR:-}}"
+export OMNI_CONTROL_RELAY_VIA="${OMNI_CONTROL_RELAY_VIA:-${ROBOT_SIDE_OMNISOCKET_RELAY_VIA:-}}"
+export OMNI_CONTROL_UNIX_SOCKET_PATH="${OMNI_CONTROL_UNIX_SOCKET_PATH:-${ROBOT_RECEIVER_LOCAL_SOCKET_PATH}}"
+export B_SIDE_OMNID_USE_SUDO="${B_SIDE_OMNID_USE_SUDO:-1}"

scripts/dev/log-network-summary.py

@@ -0,0 +1,100 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import argparse
+import json
+import signal
+import sys
+import time
+import urllib.error
+import urllib.request
+from pathlib import Path
+
+
+STOP_REQUESTED = False
+
+
+def handle_signal(signum: int, frame: object) -> None:
+    del signum, frame
+    global STOP_REQUESTED
+    STOP_REQUESTED = True
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(description="Poll /api/network/latest/ and append JSONL snapshots.")
+    parser.add_argument("--url", required=True, help="HTTP endpoint that returns the network summary JSON.")
+    parser.add_argument("--output", required=True, help="Output JSONL path.")
+    parser.add_argument(
+        "--interval-ms",
+        type=int,
+        default=2000,
+        help="Polling interval in milliseconds. Default: 2000.",
+    )
+    parser.add_argument(
+        "--request-timeout-sec",
+        type=float,
+        default=3.0,
+        help="Single request timeout in seconds. Default: 3.0.",
+    )
+    return parser.parse_args()
+
+
+def sleep_with_stop(seconds: float) -> None:
+    deadline = time.monotonic() + max(0.0, seconds)
+    while not STOP_REQUESTED:
+        remaining = deadline - time.monotonic()
+        if remaining <= 0.0:
+            return
+        time.sleep(min(remaining, 0.2))
+
+
+def fetch_json(url: str, timeout_sec: float) -> str:
+    request = urllib.request.Request(
+        url,
+        headers={
+            "Accept": "application/json",
+            "Cache-Control": "no-cache",
+        },
+        method="GET",
+    )
+    with urllib.request.urlopen(request, timeout=timeout_sec) as response:
+        charset = response.headers.get_content_charset("utf-8")
+        payload = response.read().decode(charset)
+    parsed = json.loads(payload)
+    return json.dumps(parsed, separators=(",", ":"), ensure_ascii=False)
+
+
+def main() -> int:
+    args = parse_args()
+    interval_sec = max(args.interval_ms, 200) / 1000.0
+    output_path = Path(args.output)
+    last_error_log_monotonic = 0.0
+
+    signal.signal(signal.SIGINT, handle_signal)
+    signal.signal(signal.SIGTERM, handle_signal)
+
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+
+    with output_path.open("a", encoding="utf-8") as output_file:
+        while not STOP_REQUESTED:
+            started = time.monotonic()
+            try:
+                line = fetch_json(args.url, args.request_timeout_sec)
+            except (TimeoutError, urllib.error.URLError, urllib.error.HTTPError, json.JSONDecodeError) as error:
+                now = time.monotonic()
+                if now - last_error_log_monotonic >= 10.0:
+                    print(f"[network-summary] poll failed: {error}", file=sys.stderr)
+                    last_error_log_monotonic = now
+            else:
+                output_file.write(line)
+                output_file.write("\n")
+                output_file.flush()
+
+            elapsed = time.monotonic() - started
+            sleep_with_stop(max(0.0, interval_sec - elapsed))
+
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

scripts/dev/robot-remote.env

@@ -0,0 +1,68 @@
+# Optional absolute path override for the companion repo.
+# By default the scripts assume:
+#   OmniSocketGo -> current repo
+#   robot-command-center -> sibling directory next to OmniSocketGo
+# Example:
+# ROBOT_COMMAND_CENTER_ROOT="$HOME/Documents/robot-command-center"
+
+CONTROL_SIDE_OMNISOCKET_SERVER_ADDR="81.70.156.140:10909"
+CONTROL_SIDE_OMNISOCKET_RELAY_VIA="81.70.156.140:10909"
+
+ROBOT_SIDE_OMNISOCKET_SERVER_ADDR="81.70.156.140:10909"
+ROBOT_SIDE_OMNISOCKET_RELAY_VIA="106.55.173.235:10909"
+
+CONTROL_WS_ALLOWED_ORIGINS="http://127.0.0.1:5173,http://localhost:5173"
+VITE_API_BASE_URL="http://127.0.0.1:8001"
+
+PYTHON3_BIN="python3"
+PYTHON_VENV_PATH="${OMNISOCKETGO_ROOT}/.venv"
+
+BACKEND_HOST="0.0.0.0"
+BACKEND_PORT="8001"
+OMNISOCKET_TELEMETRY_PEER_ID="peer-a-telemetry"
+OMNISOCKET_TELEMETRY_INTERVAL_MS="1000"
+OMNISOCKET_TELEMETRY_STALE_AFTER_MS="3000"
+OMNI_NETWORK_SUMMARY_LOG_ENABLED="1"
+OMNI_NETWORK_SUMMARY_LOG_PATH="${OMNISOCKETGO_ROOT}/logs/a-network-summary.jsonl"
+OMNI_NETWORK_SUMMARY_LOG_INTERVAL_MS="5000"
+OMNI_NETWORK_SUMMARY_LOG_REQUEST_TIMEOUT_SEC="3"
+
+FRONTEND_HOST="0.0.0.0"
+FRONTEND_PORT="5173"
+
+ROS_DISTRO="humble"
+ROBOT_RECEIVER_TRANSPORT="unix_dgram"
+ROBOT_RECEIVER_SERVER_ADDR="${ROBOT_SIDE_OMNISOCKET_SERVER_ADDR}"
+ROBOT_RECEIVER_RELAY_VIA="${ROBOT_SIDE_OMNISOCKET_RELAY_VIA}"
+ROBOT_RECEIVER_PEER_ID="ros-bridge-ctrl"
+ROBOT_RECEIVER_EXPECTED_SENDER=""
+ROBOT_RECEIVER_LOCAL_SOCKET_PATH="/tmp/omnisocket-b-side-cmd.sock"
+ROBOT_RECEIVER_OUTPUT_TOPIC="/hric/robot/cmd_vel"
+ROBOT_RECEIVER_FRAME_ID="pelvis"
+ROBOT_RECEIVER_WATCHDOG_TIMEOUT="0.5"
+ROBOT_RECEIVER_PUBLISH_RATE_HZ="100.0"
+
+OMNI_VIDEO_PEER_ID="peer-b-video"
+OMNI_VIDEO_TARGET_PEER="peer-a-video"
+OMNI_GPSD_HOST="127.0.0.1"
+OMNI_CAMERA_DEVICE="/dev/video0"
+OMNI_CAMERA_PROFILE="day"
+OMNI_CAMERA_BRIGHTNESS=""
+OMNI_CAMERA_CUSTOM_CTRL=""
+OMNI_CAMERA_VERIFY="0"
+OMNI_VIDEO_SERVER_ADDR="${ROBOT_SIDE_OMNISOCKET_SERVER_ADDR}"
+OMNI_VIDEO_RELAY_VIA="${ROBOT_SIDE_OMNISOCKET_RELAY_VIA}"
+OMNI_VIDEO_SOFT_BACKPRESSURE_SEGMENTS="64"
+OMNI_VIDEO_HARD_BACKPRESSURE_SEGMENTS="192"
+OMNI_VIDEO_HARD_BACKPRESSURE_HOLD_MS="1000"
+OMNI_CONTROL_PEER_ID="peer-b-ctrl"
+OMNI_CONTROL_EXPECTED_SENDER="peer-a-ctrl"
+OMNI_CONTROL_SERVER_ADDR="${ROBOT_SIDE_OMNISOCKET_SERVER_ADDR}"
+OMNI_CONTROL_RELAY_VIA="${ROBOT_SIDE_OMNISOCKET_RELAY_VIA}"
+OMNI_CONTROL_UNIX_SOCKET_PATH="${ROBOT_RECEIVER_LOCAL_SOCKET_PATH}"
+OMNI_CONTROL_SERVER_IDLE_RECONNECT_MS="3000"
+
+# A-side backend video freshness guard. Used by scripts/dev/start-backend.sh.
+OMNI_VIDEO_MAX_FRAME_AGE_MS="1000"
+
+B_SIDE_OMNID_USE_SUDO="1"

scripts/dev/start-b-side-omnid.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/load-env.sh"
+
+cd "${OMNISOCKETGO_ROOT}"
+
+export OMNISOCKET_SERVER_ADDR="${ROBOT_SIDE_OMNISOCKET_SERVER_ADDR}"
+export OMNISOCKET_RELAY_VIA="${ROBOT_SIDE_OMNISOCKET_RELAY_VIA}"
+export OMNI_VIDEO_SERVER_ADDR="${OMNI_VIDEO_SERVER_ADDR}"
+export OMNI_VIDEO_RELAY_VIA="${OMNI_VIDEO_RELAY_VIA}"
+export OMNI_CONTROL_SERVER_ADDR="${OMNI_CONTROL_SERVER_ADDR}"
+export OMNI_CONTROL_RELAY_VIA="${OMNI_CONTROL_RELAY_VIA}"
+
+if [[ ! -x "./bin/b_side_omnid" ]]; then
+  if [[ "${OMNI_BOOT_MODE:-0}" == "1" ]]; then
+    echo "Missing ./bin/b_side_omnid in boot mode; build it before enabling the autostart service." >&2
+    exit 1
+  fi
+  make b_side_omnid
+fi
+
+launch_b_side_omnid() {
+  bash "${SCRIPT_DIR}/apply-camera-controls.sh"
+  exec ./bin/b_side_omnid
+}
+
+if [[ "${B_SIDE_OMNID_USE_SUDO}" == "1" && "${EUID}" -ne 0 ]]; then
+  exec sudo -E bash -lc 'cd "$1" && bash "$2" && exec "$3"' _ "${OMNISOCKETGO_ROOT}" "${SCRIPT_DIR}/apply-camera-controls.sh" "./bin/b_side_omnid"
+fi
+
+launch_b_side_omnid

scripts/dev/start-backend.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/load-env.sh"
+require_robot_command_center_root
+
+if [[ ! -d "${PYTHON_VENV_PATH}" ]]; then
+  "${PYTHON3_BIN}" -m venv "${PYTHON_VENV_PATH}"
+fi
+
+# shellcheck disable=SC1091
+source "${PYTHON_VENV_PATH}/bin/activate"
+
+cd "${BACKEND_DIR}"
+export OMNISOCKET_SERVER_ADDR="${CONTROL_SIDE_OMNISOCKET_SERVER_ADDR}"
+export OMNISOCKET_RELAY_VIA="${CONTROL_SIDE_OMNISOCKET_RELAY_VIA}"
+
+logger_pid=""
+
+cleanup() {
+  if [[ -n "${logger_pid}" ]]; then
+    kill "${logger_pid}" 2>/dev/null || true
+    wait "${logger_pid}" 2>/dev/null || true
+  fi
+}
+
+start_network_summary_logger() {
+  local logger_url
+  local logger_dir
+
+  if [[ "${OMNI_NETWORK_SUMMARY_LOG_ENABLED}" != "1" ]]; then
+    return
+  fi
+
+  logger_url="http://127.0.0.1:${BACKEND_PORT}/api/network/latest/"
+  logger_dir="$(dirname "${OMNI_NETWORK_SUMMARY_LOG_PATH}")"
+  mkdir -p "${logger_dir}"
+
+  python "${SCRIPT_DIR}/log-network-summary.py" \
+    --url "${logger_url}" \
+    --output "${OMNI_NETWORK_SUMMARY_LOG_PATH}" \
+    --interval-ms "${OMNI_NETWORK_SUMMARY_LOG_INTERVAL_MS}" \
+    --request-timeout-sec "${OMNI_NETWORK_SUMMARY_LOG_REQUEST_TIMEOUT_SEC}" &
+  logger_pid=$!
+  echo "[start-backend] network summary logger -> ${OMNI_NETWORK_SUMMARY_LOG_PATH} (${OMNI_NETWORK_SUMMARY_LOG_INTERVAL_MS} ms)" >&2
+}
+
+trap cleanup EXIT INT TERM
+
+start_network_summary_logger
+python -m uvicorn config.asgi:application --host "${BACKEND_HOST}" --port "${BACKEND_PORT}"

scripts/dev/start-dev-tmux.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SESSION_NAME="${1:-robot-remote}"
+
+if ! command -v tmux >/dev/null 2>&1; then
+  echo "tmux is required for this launcher" >&2
+  exit 1
+fi
+
+if tmux has-session -t "${SESSION_NAME}" 2>/dev/null; then
+  exec tmux attach -t "${SESSION_NAME}"
+fi
+
+tmux new-session -d -s "${SESSION_NAME}" -n backend "bash -lc '${SCRIPT_DIR}/start-backend.sh'"
+tmux new-window -t "${SESSION_NAME}:" -n frontend "bash -lc '${SCRIPT_DIR}/start-frontend.sh'"
+tmux new-window -t "${SESSION_NAME}:" -n ros "bash -lc '${SCRIPT_DIR}/start-ros-receiver.sh'"
+tmux new-window -t "${SESSION_NAME}:" -n b-side "bash -lc '${SCRIPT_DIR}/start-b-side-omnid.sh'"
+
+exec tmux attach -t "${SESSION_NAME}"

scripts/dev/start-frontend.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/load-env.sh"
+require_robot_command_center_root
+
+cd "${FRONTEND_DIR}"
+exec npm run dev -- --host "${FRONTEND_HOST}" --port "${FRONTEND_PORT}"

scripts/dev/start-ros-receiver.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+source_with_nounset_off() {
+  set +u
+  # shellcheck disable=SC1090
+  source "$1"
+  set -u
+}
+
+# shellcheck disable=SC1091
+source "${SCRIPT_DIR}/load-env.sh"
+if [[ ! -f "/opt/ros/${ROS_DISTRO}/setup.bash" ]]; then
+  echo "Missing ROS distro setup: /opt/ros/${ROS_DISTRO}/setup.bash" >&2
+  exit 1
+fi
+source_with_nounset_off "/opt/ros/${ROS_DISTRO}/setup.bash"
+
+cd "${ROS_CONTROL_PY_DIR}"
+if [[ ! -f "install/setup.bash" ]]; then
+  echo "Missing ROS workspace setup: ${ROS_CONTROL_PY_DIR}/install/setup.bash" >&2
+  exit 1
+fi
+source_with_nounset_off "install/setup.bash"
+
+launch_args=(
+  "transport:=${ROBOT_RECEIVER_TRANSPORT}"
+  "peer_id:=${ROBOT_RECEIVER_PEER_ID}"
+  "local_socket_path:=${ROBOT_RECEIVER_LOCAL_SOCKET_PATH}"
+  "output_topic:=${ROBOT_RECEIVER_OUTPUT_TOPIC}"
+  "frame_id:=${ROBOT_RECEIVER_FRAME_ID}"
+  "watchdog_timeout:=${ROBOT_RECEIVER_WATCHDOG_TIMEOUT}"
+  "publish_rate_hz:=${ROBOT_RECEIVER_PUBLISH_RATE_HZ}"
+)
+
+if [[ -n "${ROBOT_RECEIVER_SERVER_ADDR}" ]]; then
+  launch_args+=("server_addr:=${ROBOT_RECEIVER_SERVER_ADDR}")
+fi
+
+if [[ -n "${ROBOT_RECEIVER_RELAY_VIA}" ]]; then
+  launch_args+=("relay_via:=${ROBOT_RECEIVER_RELAY_VIA}")
+fi
+
+if [[ -n "${ROBOT_RECEIVER_EXPECTED_SENDER}" ]]; then
+  launch_args+=("expected_sender:=${ROBOT_RECEIVER_EXPECTED_SENDER}")
+fi
+
+exec ros2 launch udp_teleop_bridge robot_udp_receiver.launch.py "${launch_args[@]}"

scripts/start_b_side.sh

@@ -1,11 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
-CONFIG_PATH="${1:-$ROOT/config/b_side_omnidaemon.yaml}"
-
-export OMNIBDAEMON_CONFIG="$CONFIG_PATH"
-export PYTHONPATH="$ROOT/python${PYTHONPATH:+:$PYTHONPATH}"
-
-cd "$ROOT"
-exec python3 -m omnisocket_b_side.daemon --config "$CONFIG_PATH"

src/gps_buffer.c

@@ -0,0 +1,333 @@
+#include "gps_buffer.h"
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <math.h>
+#include <errno.h> // 确保包含 errno
+
+// 全局共享变量
+static gps_video_sample_t g_current_gps_data = {0.0, 0.0};
+static volatile int g_running = 0;
+static pthread_t g_gps_thread;
+static pthread_mutex_t g_gps_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+static double normalize_coordinate(double coordinate) {
+    return round(coordinate * 1000000.0) / 1000000.0;
+}
+
+static void store_gps(double latitude, double longitude) {
+    pthread_mutex_lock(&g_gps_mutex);
+    g_current_gps_data.latitude = normalize_coordinate(latitude);
+    g_current_gps_data.longitude = normalize_coordinate(longitude);
+    pthread_mutex_unlock(&g_gps_mutex);
+}
+
+static void clear_gps(void) {
+    pthread_mutex_lock(&g_gps_mutex);
+    g_current_gps_data.latitude = 0.0;
+    g_current_gps_data.longitude = 0.0;
+    pthread_mutex_unlock(&g_gps_mutex);
+}
+
+static gps_video_sample_t load_gps(void) {
+    gps_video_sample_t sample;
+
+    pthread_mutex_lock(&g_gps_mutex);
+    sample = g_current_gps_data;
+    pthread_mutex_unlock(&g_gps_mutex);
+    return sample;
+}
+
+static void gps_sleep_before_retry(void) {
+    int retry_ms = 1000;
+    int step_ms = 100;
+    int elapsed_ms = 0;
+
+    while (g_running && elapsed_ms < retry_ms) {
+        usleep((useconds_t) step_ms * 1000U);
+        elapsed_ms += step_ms;
+    }
+}
+
+// 将经纬度规范化为 double，保留 6 位小数。
+static int normalize_gps(double latitude, double longitude, gps_video_sample_t* sample) {
+    if (!isfinite(latitude) || !isfinite(longitude)) {
+        return -1;
+    }
+    // 过滤掉 0,0 这种无效坐标
+    if (fabs(latitude) < 1e-6 && fabs(longitude) < 1e-6) {
+        return -1;
+    }
+
+    if (sample == NULL) {
+        return -1;
+    }
+
+    sample->latitude = normalize_coordinate(latitude);
+    sample->longitude = normalize_coordinate(longitude);
+    return 0;
+}
+
+// =================================================================
+// 以下是借鉴 gps_parse.c 实现的底层解析函数
+// =================================================================
+
+// 1. 辅助函数：在 JSON 字符串中查找键对应的值的起始位置
+static const char* find_json_value(const char* json, const char* key) {
+    char pattern[64];
+    int written;
+    const char* position;
+
+    if (json == NULL || key == NULL) return NULL;
+
+    // 构建搜索模式: "key":
+    written = snprintf(pattern, sizeof(pattern), "\"%s\":", key);
+    if (written < 0 || (size_t)written >= sizeof(pattern)) {
+        return NULL;
+    }
+
+    position = strstr(json, pattern);
+    if (position == NULL) {
+        return NULL;
+    }
+
+    // 跳过 "key":
+    position += written;
+
+    // 跳过可能存在的空格
+    while (*position == ' ' || *position == '\t') {
+        position++;
+    }
+
+    return position;
+}
+
+// 2. 解析函数：从 JSON 字符串中提取 Double 类型的值
+static int json_extract_double(const char* json, const char* key, double* value) {
+    const char* position;
+    char* endptr = NULL;
+    double parsed;
+
+    position = find_json_value(json, key);
+    if (position == NULL) {
+        return 0; // 键不存在
+    }
+
+    // 确保当前位置是数字或负号
+    if (*position != '-' && !(*position >= '0' && *position <= '9')) {
+        return 0;
+    }
+
+    // 重置 errno 以检测错误
+    errno = 0;
+    parsed = strtod(position, &endptr);
+
+    // 检查转换是否成功
+    if (errno != 0 || endptr == position || !isfinite(parsed)) {
+        return 0;
+    }
+
+    *value = parsed;
+    return 1;
+}
+
+// 3. 解析函数：从 JSON 字符串中提取 Int 类型的值
+static int json_extract_int(const char* json, const char* key, int* value) {
+    double dval;
+    if (json_extract_double(json, key, &dval)) {
+        *value = (int)dval;
+        return 1;
+    }
+    return 0;
+}
+
+// 4. 检查是否为 TPV (定位数据) 包
+static int is_tpv_class(const char* json) {
+    char class_buf[32] = {0};
+    const char* pos = find_json_value(json, "class");
+    if (pos == NULL || *pos != '"') return 0;
+    
+    // 简单提取 class 的值 (TPV/SKY/DEVICES)
+    sscanf(pos, "\"%31[^\"]\"", class_buf);
+    return (strcmp(class_buf, "TPV") == 0);
+}
+
+// =================================================================
+// 后台线程函数：负责连接 gpsd 并更新全局变量
+// =================================================================
+void* gps_update_thread(void* arg) {
+    const char* host = (const char*)arg;
+    const char* gpsd_host = (host != NULL && host[0] != '\0') ? host : "127.0.0.1";
+
+    while (g_running) {
+        int sockfd = -1;
+        struct addrinfo hints;
+        struct addrinfo *res = NULL;
+        struct addrinfo *rp = NULL;
+        int s;
+        char buffer[4096];
+        size_t offset = 0;
+
+        // 1. 解析地址并连接 gpsd (默认端口 2947)
+        memset(&hints, 0, sizeof(hints));
+        hints.ai_family = AF_UNSPEC;    // 兼容 IPv4/IPv6
+        hints.ai_socktype = SOCK_STREAM;
+
+        s = getaddrinfo(gpsd_host, "2947", &hints, &res);
+        if (s != 0) {
+            fprintf(stderr, "GPS线程: 解析 gpsd 地址失败 %s:2947: %s\n", gpsd_host, gai_strerror(s));
+            gps_sleep_before_retry();
+            continue;
+        }
+
+        // 尝试连接每一个解析出来的地址
+        for (rp = res; rp != NULL; rp = rp->ai_next) {
+            sockfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
+            if (sockfd == -1) {
+                continue;
+            }
+
+            if (connect(sockfd, rp->ai_addr, rp->ai_addrlen) != -1) {
+                break;
+            }
+            close(sockfd);
+            sockfd = -1;
+        }
+
+        freeaddrinfo(res);
+
+        if (sockfd < 0) {
+            fprintf(stderr, "GPS线程: 无法连接到 %s:2947，1 秒后重试\n", gpsd_host);
+            gps_sleep_before_retry();
+            continue;
+        }
+
+        printf("GPS线程: 已连接到 gpsd %s\n", gpsd_host);
+
+        // 2. 发送 WATCH 命令，开启 JSON 流
+        {
+            const char* watch_cmd = "?WATCH={\"enable\":true,\"json\":true};\n";
+
+            if (send(sockfd, watch_cmd, strlen(watch_cmd), 0) < 0) {
+                perror("GPS线程: 发送 WATCH 命令失败");
+                close(sockfd);
+                gps_sleep_before_retry();
+                continue;
+            }
+        }
+
+        // 3. 主循环：读取并解析数据流
+        // 注意：gpsd 数据是以 \n 结尾的，不能直接用固定长度 recv
+        while (g_running) {
+            ssize_t len = recv(sockfd, buffer + offset, sizeof(buffer) - 1 - offset, 0);
+
+            if (len <= 0) {
+                break;
+            }
+
+            offset += (size_t) len;
+            buffer[offset] = '\0'; // 确保字符串结束
+
+            // 查找换行符 \n，因为一条完整的 JSON 消息以 \n 结尾
+            char* start = buffer;
+            char* end;
+
+            while ((end = memchr(start, '\n', (buffer + offset) - start)) != NULL) {
+                *end = '\0'; // 临时截断，形成独立字符串
+
+                // --- 核心解析逻辑 ---
+                // 1. 检查是否为 TPV 数据包
+                if (is_tpv_class(start)) {
+                    double lat = 0.0;
+                    double lon = 0.0;
+                    int mode = 0;
+                    int has_fix = 0;
+
+                    // 2. 提取定位模式 (mode: 1=无定位, 2=2D, 3=3D)
+                    if (json_extract_int(start, "mode", &mode)) {
+                        has_fix = (mode >= 2);
+                    }
+
+                    // 3. 如果有定位，提取经纬度
+                    if (has_fix) {
+                        int got_lat = json_extract_double(start, "lat", &lat);
+                        int got_lon = json_extract_double(start, "lon", &lon);
+
+                        if (got_lat && got_lon) {
+                            gps_video_sample_t sample;
+
+                            // 4. 更新全局共享变量，使用 double 直接携带经纬度。
+                            if (normalize_gps(lat, lon, &sample) == 0) {
+                                store_gps(sample.latitude, sample.longitude);
+                            }
+                            // 调试：取消注释可查看实时经纬度
+                            // printf("更新GPS: lat=%.6f, lon=%.6f\n", lat, lon);
+                        }
+                    }
+                    // 如果无定位，这里不操作，保持上一次的有效值
+                }
+                // --- 解析结束 ---
+
+                // 移动指针到下一条消息
+                start = end + 1;
+            }
+
+            // 处理完所有完整消息后，将剩余未处理的数据移到缓冲区头部
+            if (start < buffer + offset) {
+                size_t remaining = (size_t) ((buffer + offset) - start);
+                memmove(buffer, start, remaining);
+                offset = remaining;
+            } else {
+                offset = 0; // 缓冲区已清空
+            }
+        }
+
+        close(sockfd);
+        if (g_running) {
+            fprintf(stderr, "GPS线程: 连接断开，1 秒后重连...\n");
+            gps_sleep_before_retry();
+        }
+    }
+
+    return NULL;
+}
+
+// =================================================================
+// 接口函数实现
+// =================================================================
+gps_video_sample_t get_latest_gps_for_video(void) {
+    return load_gps();
+}
+
+int gps_buffer_init(const char* host) {
+    if (g_running) return 0;
+    
+    g_running = 1;
+    clear_gps();
+    pthread_attr_t attr;
+    pthread_attr_init(&attr);
+    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+    // 创建后台线程
+    if (pthread_create(&g_gps_thread, &attr, gps_update_thread, (void*)host) != 0) {
+        g_running = 0;
+        pthread_attr_destroy(&attr); // 清理属性
+        perror("无法创建 GPS 线程");
+        return -1;
+    }
+    pthread_attr_destroy(&attr); // 清理属性
+    return 0;
+}
+
+void gps_buffer_cleanup(void) {
+    g_running = 0;
+    // 等待线程结束
+
+    usleep(10000); // 等待 100ms 让后台线程有机会处理退出标志
+}
+
+
+//gcc main.c video_pipeline_run.c gps_buffer.c -lpthread -lm -o my_app 请确保在编译命令中链接 pthread 和 m (math) 库

src/kcp_session_stats.c

@@ -160,6 +160,26 @@ int kcp_session_stats_log(kcp_session_stats_logger_t *logger, const kcp_session_
         kcp_session_stats_appendf(&line, &line_len, ",\"srttvar_ms\":%d", record->srttvar_ms) != 0) {
         goto cleanup;
     }
+    if (record->has_snd_wnd &&
+        kcp_session_stats_appendf(&line, &line_len, ",\"snd_wnd\":%u", record->snd_wnd) != 0) {
+        goto cleanup;
+    }
+    if (record->has_rmt_wnd &&
+        kcp_session_stats_appendf(&line, &line_len, ",\"rmt_wnd\":%u", record->rmt_wnd) != 0) {
+        goto cleanup;
+    }
+    if (record->has_inflight &&
+        kcp_session_stats_appendf(&line, &line_len, ",\"inflight\":%u", record->inflight) != 0) {
+        goto cleanup;
+    }
+    if (record->has_window_limit &&
+        kcp_session_stats_appendf(&line, &line_len, ",\"window_limit\":%u", record->window_limit) != 0) {
+        goto cleanup;
+    }
+    if (record->has_window_pressure_pct &&
+        kcp_session_stats_appendf(&line, &line_len, ",\"window_pressure_pct\":%.3f", record->window_pressure_pct) != 0) {
+        goto cleanup;
+    }
     if (record->has_bytes_sent &&
         kcp_session_stats_appendf(&line, &line_len, ",\"bytes_sent\":%" PRIu64, record->bytes_sent) != 0) {
         goto cleanup;

src/peer_kcp_client.c

@@ -1,24 +1,343 @@
 #include "peer_kcp_client.h"
 
 #include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
+#define KCP_CLIENT_REGISTER_TIMEOUT_MS 3000
+#define KCP_CLIENT_CTRL_REGISTER_OK "{\"type\":\"server_register_ok\"}"
+#define KCP_CLIENT_CTRL_PEER_REPLACED "{\"type\":\"server_peer_replaced\",\"reason\":\"new_instance_wins\"}"
+#define KCP_CLIENT_CTRL_HEARTBEAT "{\"type\":\"server_heartbeat\"}"
+#define KCP_CLIENT_CTRL_HEARTBEAT_ACK "{\"type\":\"server_heartbeat_ack\"}"
+
 struct kcp_client {
     char id[OMNI_MAX_PEER_ID];
     char server_addr[OMNI_MAX_ADDR_TEXT];
     kcp_conn_t *conn;
     latency_logger_t *logger;
-    pthread_mutex_t id_mu;
+    pthread_mutex_t state_mu;
     uint64_t next_message_id;
+    int registered;
+    uint32_t last_server_activity_ms;
+    char last_server_error[256];
 };
 
 static int kcp_client_next_message_id(kcp_client_t *client, uint64_t *out_id) {
-    pthread_mutex_lock(&client->id_mu);
+    if (client == NULL || out_id == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+    pthread_mutex_lock(&client->state_mu);
     *out_id = ++client->next_message_id;
-    pthread_mutex_unlock(&client->id_mu);
+    pthread_mutex_unlock(&client->state_mu);
     return 0;
 }
 
+static void kcp_client_set_registered(kcp_client_t *client, int registered) {
+    if (client == NULL) {
+        return;
+    }
+    pthread_mutex_lock(&client->state_mu);
+    client->registered = registered != 0;
+    pthread_mutex_unlock(&client->state_mu);
+}
+
+static void kcp_client_touch_server_activity(kcp_client_t *client) {
+    if (client == NULL) {
+        return;
+    }
+    pthread_mutex_lock(&client->state_mu);
+    client->last_server_activity_ms = omni_now_millis32();
+    pthread_mutex_unlock(&client->state_mu);
+}
+
+static void kcp_client_set_last_server_error(kcp_client_t *client, const char *message) {
+    if (client == NULL) {
+        return;
+    }
+    pthread_mutex_lock(&client->state_mu);
+    snprintf(client->last_server_error, sizeof(client->last_server_error), "%s", message == NULL ? "" : message);
+    pthread_mutex_unlock(&client->state_mu);
+}
+
+static void kcp_client_clear_last_server_error(kcp_client_t *client) {
+    kcp_client_set_last_server_error(client, "");
+}
+
+static int kcp_client_server_error_invalidates_registration(const char *message) {
+    if (message == NULL || message[0] == '\0') {
+        return 0;
+    }
+    return strstr(message, "not registered") != NULL
+        || strstr(message, "first message must be register") != NULL
+        || strstr(message, "peer replaced") != NULL
+        || strstr(message, "timed out waiting for server_register_ok") != NULL;
+}
+
+static int kcp_client_is_registered(kcp_client_t *client) {
+    int registered;
+
+    if (client == NULL) {
+        return 0;
+    }
+    pthread_mutex_lock(&client->state_mu);
+    registered = client->registered;
+    pthread_mutex_unlock(&client->state_mu);
+    return registered;
+}
+
+static int kcp_client_text_body_equals(const message_t *msg, const char *payload) {
+    size_t expected_len;
+
+    if (msg == NULL || payload == NULL || msg->body == NULL) {
+        return 0;
+    }
+    expected_len = strlen(payload);
+    return msg->body_len == expected_len && memcmp(msg->body, payload, expected_len) == 0;
+}
+
+static void kcp_client_copy_server_error_body(const message_t *msg, char *buffer, size_t buffer_len) {
+    size_t copy_len;
+
+    if (buffer == NULL || buffer_len == 0) {
+        return;
+    }
+    buffer[0] = '\0';
+    if (msg == NULL || msg->body == NULL || msg->body_len == 0) {
+        return;
+    }
+    copy_len = msg->body_len < (buffer_len - 1U) ? msg->body_len : (buffer_len - 1U);
+    memcpy(buffer, msg->body, copy_len);
+    buffer[copy_len] = '\0';
+}
+
+static int kcp_client_registration_errno_from_message(const char *message) {
+    if (message == NULL || message[0] == '\0') {
+        return ECONNREFUSED;
+    }
+    if (strstr(message, "duplicate peer id") != NULL) {
+        return EEXIST;
+    }
+    if (strstr(message, "first message must be register") != NULL) {
+        return EPROTO;
+    }
+    return ECONNREFUSED;
+}
+
+static int kcp_client_send_text_internal(kcp_client_t *client, const char *to, const char *text, int log_business_event) {
+    message_t msg;
+    uint64_t id;
+
+    if (client == NULL || to == NULL || text == NULL || client->conn == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    protocol_message_init(&msg);
+    if (kcp_client_next_message_id(client, &id) != 0) {
+        return -1;
+    }
+    msg.type = MSG_TYPE_TEXT;
+    msg.id = id;
+    snprintf(msg.from, sizeof(msg.from), "%s", client->id);
+    snprintf(msg.to, sizeof(msg.to), "%s", to);
+    msg.body = (uint8_t *) omni_strdup(text);
+    if (msg.body == NULL) {
+        return -1;
+    }
+    msg.body_len = strlen((const char *) msg.body);
+    if (log_business_event) {
+        latencylog_log_message_event(client->logger, OMNI_NODE_ROLE_PEER, client->id, EVENT_A_APP_PREP_BEGIN, &msg);
+    }
+    if (kcp_conn_send(client->conn, &msg) != 0) {
+        protocol_message_clear(&msg);
+        return -1;
+    }
+    protocol_message_clear(&msg);
+    return 0;
+}
+
+static int kcp_client_send_business_preflight(kcp_client_t *client) {
+    if (client == NULL || client->conn == NULL) {
+        errno = ENOTCONN;
+        return -1;
+    }
+    if (!kcp_client_is_registered(client)) {
+        errno = ENOTCONN;
+        return -1;
+    }
+    return 0;
+}
+
+static int kcp_client_handle_reserved_server_message(kcp_client_t *client, const message_t *msg) {
+    if (client == NULL || msg == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+    if (msg->type != MSG_TYPE_TEXT || strcmp(msg->from, SERVER_PEER_ID) != 0) {
+        return 0;
+    }
+    kcp_client_touch_server_activity(client);
+    if (kcp_client_text_body_equals(msg, KCP_CLIENT_CTRL_REGISTER_OK)) {
+        kcp_client_set_registered(client, 1);
+        kcp_client_clear_last_server_error(client);
+        return 1;
+    }
+    if (kcp_client_text_body_equals(msg, KCP_CLIENT_CTRL_HEARTBEAT)) {
+        if (kcp_client_send_text_internal(client, SERVER_PEER_ID, KCP_CLIENT_CTRL_HEARTBEAT_ACK, 0) != 0) {
+            kcp_client_set_registered(client, 0);
+            kcp_client_set_last_server_error(client, "failed to acknowledge server heartbeat");
+            (void) kcp_conn_close(client->conn);
+            return -1;
+        }
+        return 1;
+    }
+    if (kcp_client_text_body_equals(msg, KCP_CLIENT_CTRL_HEARTBEAT_ACK)) {
+        return 1;
+    }
+    if (kcp_client_text_body_equals(msg, KCP_CLIENT_CTRL_PEER_REPLACED)) {
+        kcp_client_set_registered(client, 0);
+        kcp_client_set_last_server_error(client, "server peer replaced this session");
+        (void) kcp_conn_close(client->conn);
+        errno = ECONNRESET;
+        return -1;
+    }
+    return 0;
+}
+
+static int kcp_client_remaining_timeout_ms(int original_timeout_ms, uint32_t start_ms) {
+    uint32_t elapsed_ms;
+
+    if (original_timeout_ms < 0) {
+        return -1;
+    }
+    elapsed_ms = omni_now_millis32() - start_ms;
+    if (elapsed_ms >= (uint32_t) original_timeout_ms) {
+        return 0;
+    }
+    return original_timeout_ms - (int) elapsed_ms;
+}
+
+static int kcp_client_wait_for_register_ok(kcp_client_t *client) {
+    uint32_t start_ms;
+
+    if (client == NULL || client->conn == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    start_ms = omni_now_millis32();
+    for (;;) {
+        message_t msg;
+        int rc;
+        int remaining_timeout_ms = kcp_client_remaining_timeout_ms(KCP_CLIENT_REGISTER_TIMEOUT_MS, start_ms);
+
+        if (remaining_timeout_ms <= 0) {
+            kcp_client_set_registered(client, 0);
+            kcp_client_set_last_server_error(client, "timed out waiting for server_register_ok");
+            (void) kcp_conn_close(client->conn);
+            errno = ETIMEDOUT;
+            return -1;
+        }
+
+        protocol_message_init(&msg);
+        rc = kcp_conn_receive_timed(client->conn, &msg, remaining_timeout_ms);
+        if (rc == 1) {
+            protocol_message_clear(&msg);
+            kcp_client_set_registered(client, 0);
+            kcp_client_set_last_server_error(client, "timed out waiting for server_register_ok");
+            (void) kcp_conn_close(client->conn);
+            errno = ETIMEDOUT;
+            return -1;
+        }
+        if (rc != 0) {
+            protocol_message_clear(&msg);
+            kcp_client_set_registered(client, 0);
+            return -1;
+        }
+        if (msg.type == MSG_TYPE_ERROR && strcmp(msg.from, SERVER_PEER_ID) == 0) {
+            char error_text[256];
+
+            kcp_client_copy_server_error_body(&msg, error_text, sizeof(error_text));
+            kcp_client_touch_server_activity(client);
+            kcp_client_set_registered(client, 0);
+            kcp_client_set_last_server_error(client, error_text);
+            protocol_message_clear(&msg);
+            (void) kcp_conn_close(client->conn);
+            errno = kcp_client_registration_errno_from_message(error_text);
+            return -1;
+        }
+        rc = kcp_client_handle_reserved_server_message(client, &msg);
+        protocol_message_clear(&msg);
+        if (rc < 0) {
+            return -1;
+        }
+        if (rc > 0 && kcp_client_is_registered(client)) {
+            return 0;
+        }
+
+        kcp_client_set_registered(client, 0);
+        kcp_client_set_last_server_error(client, "unexpected message while waiting for server_register_ok");
+        (void) kcp_conn_close(client->conn);
+        errno = EPROTO;
+        return -1;
+    }
+}
+
+static int kcp_client_receive_business_timed(kcp_client_t *client, message_t *out_msg, int timeout_ms) {
+    uint32_t start_ms;
+
+    if (client == NULL || out_msg == NULL || client->conn == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    start_ms = omni_now_millis32();
+    protocol_message_init(out_msg);
+    for (;;) {
+        int rc;
+        int reserved_rc;
+        int effective_timeout_ms = timeout_ms < 0 ? -1 : kcp_client_remaining_timeout_ms(timeout_ms, start_ms);
+
+        if (timeout_ms >= 0 && effective_timeout_ms <= 0) {
+            return 1;
+        }
+        protocol_message_clear(out_msg);
+        rc = kcp_conn_receive_timed(client->conn, out_msg, effective_timeout_ms);
+        if (rc != 0) {
+            if (rc != 1) {
+                kcp_client_set_registered(client, 0);
+            }
+            return rc;
+        }
+
+        if (strcmp(out_msg->from, SERVER_PEER_ID) == 0) {
+            kcp_client_touch_server_activity(client);
+        }
+        reserved_rc = kcp_client_handle_reserved_server_message(client, out_msg);
+        if (reserved_rc < 0) {
+            protocol_message_clear(out_msg);
+            return -1;
+        }
+        if (reserved_rc > 0) {
+            protocol_message_clear(out_msg);
+            continue;
+        }
+        if (out_msg->type == MSG_TYPE_ERROR && strcmp(out_msg->from, SERVER_PEER_ID) == 0) {
+            char error_text[256];
+
+            kcp_client_copy_server_error_body(out_msg, error_text, sizeof(error_text));
+            kcp_client_set_last_server_error(client, error_text);
+            if (kcp_client_server_error_invalidates_registration(error_text)) {
+                kcp_client_set_registered(client, 0);
+            }
+        }
+        latencylog_log_message_event(client->logger, OMNI_NODE_ROLE_PEER, client->id, EVENT_B_APP_RECV, out_msg);
+        return 0;
+    }
+}
+
 static int kcp_client_persist_message_to_disk(const message_t *msg, const char *inbox_dir, char *out_path, size_t out_path_len) {
     char path[512];
 
@@ -107,7 +426,8 @@ kcp_client_t *kcp_client_dial_with_options(const char *server_addr, const char *
     }
     snprintf(client->id, sizeof(client->id), "%s", peer_id);
     snprintf(client->server_addr, sizeof(client->server_addr), "%s", server_addr == NULL ? "" : server_addr);
-    pthread_mutex_init(&client->id_mu, NULL);
+    pthread_mutex_init(&client->state_mu, NULL);
+    client->last_server_activity_ms = omni_now_millis32();
     client->logger = logger;
     client->conn = kcp_conn_dial_with_options(actual_dial_addr, bind_ip, bind_device, options, packet_logger, logger, OMNI_NODE_ROLE_PEER, peer_id, stats_logger, stats_interval_ms);
     if (client->conn == NULL) {
@@ -128,6 +448,12 @@ kcp_client_t *kcp_client_dial_with_options(const char *server_addr, const char *
         errno = saved_errno;
         return NULL;
     }
+    if (kcp_client_wait_for_register_ok(client) != 0) {
+        saved_errno = errno;
+        kcp_client_free(client);
+        errno = saved_errno;
+        return NULL;
+    }
     return client;
 }
 
@@ -140,31 +466,14 @@ const char *kcp_client_id(const kcp_client_t *client) {
 }
 
 int kcp_client_send_text(kcp_client_t *client, const char *to, const char *text) {
-    message_t msg;
-    uint64_t id;
-
     if (client == NULL || to == NULL || text == NULL) {
         errno = EINVAL;
         return -1;
     }
-    protocol_message_init(&msg);
-    kcp_client_next_message_id(client, &id);
-    msg.type = MSG_TYPE_TEXT;
-    msg.id = id;
-    snprintf(msg.from, sizeof(msg.from), "%s", client->id);
-    snprintf(msg.to, sizeof(msg.to), "%s", to);
-    msg.body = (uint8_t *) omni_strdup(text);
-    if (msg.body == NULL) {
+    if (kcp_client_send_business_preflight(client) != 0) {
         return -1;
     }
-    msg.body_len = strlen((const char *) msg.body);
-    latencylog_log_message_event(client->logger, OMNI_NODE_ROLE_PEER, client->id, EVENT_A_APP_PREP_BEGIN, &msg);
-    if (kcp_conn_send(client->conn, &msg) != 0) {
-        protocol_message_clear(&msg);
-        return -1;
-    }
-    protocol_message_clear(&msg);
-    return 0;
+    return kcp_client_send_text_internal(client, to, text, 1);
 }
 
 int kcp_client_send_binary(kcp_client_t *client, const char *to, const void *data, size_t data_len) {
@@ -175,8 +484,13 @@ int kcp_client_send_binary(kcp_client_t *client, const char *to, const void *dat
         errno = EINVAL;
         return -1;
     }
+    if (kcp_client_send_business_preflight(client) != 0) {
+        return -1;
+    }
     protocol_message_init(&msg);
-    kcp_client_next_message_id(client, &id);
+    if (kcp_client_next_message_id(client, &id) != 0) {
+        return -1;
+    }
     msg.type = MSG_TYPE_BINARY;
     msg.id = id;
     snprintf(msg.from, sizeof(msg.from), "%s", client->id);
@@ -209,11 +523,17 @@ int kcp_client_send_file_path(kcp_client_t *client, const char *to, const char *
         errno = EINVAL;
         return -1;
     }
+    if (kcp_client_send_business_preflight(client) != 0) {
+        return -1;
+    }
     if (omni_read_file(path, &body, &body_len) != 0) {
         return -1;
     }
     protocol_message_init(&msg);
-    kcp_client_next_message_id(client, &id);
+    if (kcp_client_next_message_id(client, &id) != 0) {
+        free(body);
+        return -1;
+    }
     msg.type = MSG_TYPE_FILE;
     msg.id = id;
     snprintf(msg.from, sizeof(msg.from), "%s", client->id);
@@ -231,18 +551,11 @@ int kcp_client_send_file_path(kcp_client_t *client, const char *to, const char *
 }
 
 int kcp_client_receive_timed(kcp_client_t *client, message_t *out_msg, int timeout_ms) {
-    int rc;
-
     if (client == NULL || out_msg == NULL) {
         errno = EINVAL;
         return -1;
     }
-    rc = kcp_conn_receive_timed(client->conn, out_msg, timeout_ms);
-    if (rc != 0) {
-        return rc;
-    }
-    latencylog_log_message_event(client->logger, OMNI_NODE_ROLE_PEER, client->id, EVENT_B_APP_RECV, out_msg);
-    return 0;
+    return kcp_client_receive_business_timed(client, out_msg, timeout_ms);
 }
 
 int kcp_client_receive(kcp_client_t *client, message_t *out_msg) {
@@ -264,6 +577,7 @@ int kcp_client_receive_binary_into(kcp_client_t *client, void *buffer, size_t bu
     protocol_message_init(&msg);
     rc = kcp_client_receive_timed(client, &msg, timeout_ms);
     if (rc != 0) {
+        protocol_message_clear(&msg);
         return rc;
     }
 
@@ -294,16 +608,48 @@ int kcp_client_persist_message(kcp_client_t *client, const message_t *msg, const
     return 0;
 }
 
-int kcp_client_metrics_snapshot(kcp_client_t *client, kcp_conn_metrics_t *out_metrics) {
-    if (client == NULL || out_metrics == NULL) {
-        errno = EINVAL;
-        return -1;
+void kcp_client_state_snapshot(kcp_client_t *client, kcp_client_state_t *out_state) {
+    kcp_runtime_stats_t runtime_stats;
+
+    if (out_state == NULL) {
+        return;
     }
-    return kcp_conn_metrics_snapshot(client->conn, out_metrics);
+    memset(out_state, 0, sizeof(*out_state));
+    if (client == NULL) {
+        return;
+    }
+    memset(&runtime_stats, 0, sizeof(runtime_stats));
+    if (client->conn != NULL) {
+        kcp_conn_runtime_stats_snapshot(client->conn, &runtime_stats);
+        out_state->connected = runtime_stats.connected;
+    }
+    pthread_mutex_lock(&client->state_mu);
+    out_state->registered = client->registered;
+    out_state->server_idle_ms = client->last_server_activity_ms == 0
+        ? 0
+        : (omni_now_millis32() - client->last_server_activity_ms);
+    snprintf(out_state->last_server_error, sizeof(out_state->last_server_error), "%s", client->last_server_error);
+    pthread_mutex_unlock(&client->state_mu);
+}
+
+void kcp_client_runtime_stats_snapshot(kcp_client_t *client, kcp_runtime_stats_t *out_stats) {
+    if (out_stats == NULL) {
+        return;
+    }
+
+    memset(out_stats, 0, sizeof(*out_stats));
+    if (client == NULL || client->conn == NULL) {
+        return;
+    }
+    kcp_conn_runtime_stats_snapshot(client->conn, out_stats);
 }
 
 int kcp_client_close(kcp_client_t *client) {
-    return client == NULL ? 0 : kcp_conn_close(client->conn);
+    if (client == NULL) {
+        return 0;
+    }
+    kcp_client_set_registered(client, 0);
+    return kcp_conn_close(client->conn);
 }
 
 void kcp_client_free(kcp_client_t *client) {
@@ -311,6 +657,6 @@ void kcp_client_free(kcp_client_t *client) {
         return;
     }
     kcp_conn_free(client->conn);
-    pthread_mutex_destroy(&client->id_mu);
+    pthread_mutex_destroy(&client->state_mu);
     free(client);
 }