feat: 把 B 端的 视频/控制 都收口到一个本地 daemon 进程里

python/omnisocket_b_side/__init__.py

@@ -0,0 +1,10 @@
+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

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

python/omnisocket_b_side/client.py

@@ -0,0 +1,54 @@
+"""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