fix:“RawConn 不稳定导致连接被误杀

cmd/internal/transport/tcp_linux.go

@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"strings"
 	"syscall"
 	"time"
 
@@ -150,9 +151,15 @@ func (c *TCPConn) writeFrameLinux(frame []byte) error {
 		}
 	})
 	if err != nil {
+		if isRawConnNotPollable(err) {
+			return writeFullFallback(c.conn, frame[written:])
+		}
 		return err
 	}
 	if opErr != nil {
+		if isRawConnNotPollable(opErr) {
+			return writeFullFallback(c.conn, frame[written:])
+		}
 		return opErr
 	}
 	if written != len(frame) {
@@ -367,6 +374,15 @@ func (c *TCPConn) readFullLinux(buf []byte) (int64, error) {
 			firstRXTime = rxTimestamp
 		}
 		if err != nil {
+			if isRawConnNotPollable(err) {
+				if fallbackErr := readFullFallback(c.conn, buf[offset:]); fallbackErr != nil {
+					if errors.Is(fallbackErr, io.EOF) && offset > 0 {
+						return firstRXTime, io.ErrUnexpectedEOF
+					}
+					return firstRXTime, fallbackErr
+				}
+				return firstRXTime, nil
+			}
 			if errors.Is(err, io.EOF) && offset > 0 {
 				return firstRXTime, io.ErrUnexpectedEOF
 			}
@@ -460,3 +476,27 @@ func parseSCMTimestampingData(data []byte) int64 {
 func isWouldBlock(err error) bool {
 	return errors.Is(err, syscall.EAGAIN) || errors.Is(err, syscall.EWOULDBLOCK)
 }
+
+func isRawConnNotPollable(err error) bool {
+	return err != nil && strings.Contains(err.Error(), "not pollable")
+}
+
+func writeFullFallback(w io.Writer, buf []byte) error {
+	for len(buf) > 0 {
+		n, err := w.Write(buf)
+		if err != nil {
+			return err
+		}
+		if n <= 0 {
+			return io.ErrShortWrite
+		}
+		buf = buf[n:]
+	}
+
+	return nil
+}
+
+func readFullFallback(r io.Reader, buf []byte) error {
+	_, err := io.ReadFull(r, buf)
+	return err
+}