Fix: PacketConn's internal remote address is overwritten (#2727)

When using vmess + fake-ip, after receiving the first UDP response, PacketConn's internal address will be rewritten to fake-ip, causing all subsequent sending operations to return "ErrUDPRemoteAddrMismatch". Signed-off-by: Hackerl <[email protected]>
yuhaya · May 11, 2023 · 10dcb7a · 10dcb7a
1 parent 4c3c64a
commit 10dcb7a
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/tunnel/connection.go b/tunnel/connection.go
@@ -39,7 +39,7 @@ func handleUDPToLocal(packet C.UDPPacket, pc net.PacketConn, key string, oAddr,
 			return
 		}
 
-		fromUDPAddr := from.(*net.UDPAddr)
+		fromUDPAddr := *from.(*net.UDPAddr)
 		if fAddr.IsValid() {
 			fromAddr, _ := netip.AddrFromSlice(fromUDPAddr.IP)
 			fromAddr = fromAddr.Unmap()
@@ -48,7 +48,7 @@ func handleUDPToLocal(packet C.UDPPacket, pc net.PacketConn, key string, oAddr,
 			}
 		}
 
-		_, err = packet.WriteBack(buf[:n], fromUDPAddr)
+		_, err = packet.WriteBack(buf[:n], &fromUDPAddr)
 		if err != nil {
 			return
 		}