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feat: bridge mixed wire protocol SUDP payloads (#5347)

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SUDP payload codec follows transport wireProtocol; same-protocol v1/v1 and v2/v2 keep raw join; only mixed proxy/visitor protocols use message-aware bridge; no new capability/selection field.
This commit is contained in:
fatedier
2026-06-01 12:33:33 +08:00
parent 9bacce22a2
commit 0773938d70
9 changed files with 449 additions and 27 deletions
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23
client/visitor/sudp.go
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@@ -113,15 +113,16 @@ func (sv *SUDPVisitor) dispatcher() {
func (sv *SUDPVisitor) worker(workConn net.Conn, firstPacket *msg.UDPPacket) {
xl := xlog.FromContextSafe(sv.ctx)
xl.Debugf("starting sudp proxy worker")
payloadConn := msg.NewConn(workConn, msg.NewReadWriter(workConn, sv.clientCfg.Transport.WireProtocol))
wg := &sync.WaitGroup{}
wg.Add(2)
closeCh := make(chan struct{})
// udp service -> frpc -> frps -> frpc visitor -> user
workConnReaderFn := func(conn net.Conn) {
workConnReaderFn := func(payloadConn *msg.Conn) {
defer func() {
conn.Close()
payloadConn.Close()
close(closeCh)
wg.Done()
}()
@@ -133,13 +134,13 @@ func (sv *SUDPVisitor) worker(workConn net.Conn, firstPacket *msg.UDPPacket) {
)
// frpc will send heartbeat in workConn to frpc visitor for keeping alive
_ = conn.SetReadDeadline(time.Now().Add(60 * time.Second))
if rawMsg, errRet = msg.ReadMsg(conn); errRet != nil {
_ = payloadConn.SetReadDeadline(time.Now().Add(60 * time.Second))
if rawMsg, errRet = payloadConn.ReadMsg(); errRet != nil {
xl.Warnf("read from workconn for user udp conn error: %v", errRet)
return
}
_ = conn.SetReadDeadline(time.Time{})
_ = payloadConn.SetReadDeadline(time.Time{})
switch m := rawMsg.(type) {
case *msg.Ping:
xl.Debugf("frpc visitor get ping message from frpc")
@@ -157,15 +158,15 @@ func (sv *SUDPVisitor) worker(workConn net.Conn, firstPacket *msg.UDPPacket) {
}
// udp service <- frpc <- frps <- frpc visitor <- user
workConnSenderFn := func(conn net.Conn) {
workConnSenderFn := func(payloadConn *msg.Conn) {
defer func() {
conn.Close()
payloadConn.Close()
wg.Done()
}()
var errRet error
if firstPacket != nil {
if errRet = msg.WriteMsg(conn, firstPacket); errRet != nil {
if errRet = payloadConn.WriteMsg(firstPacket); errRet != nil {
xl.Warnf("sender goroutine for udp work connection closed: %v", errRet)
return
}
@@ -180,7 +181,7 @@ func (sv *SUDPVisitor) worker(workConn net.Conn, firstPacket *msg.UDPPacket) {
return
}
if errRet = msg.WriteMsg(conn, udpMsg); errRet != nil {
if errRet = payloadConn.WriteMsg(udpMsg); errRet != nil {
xl.Warnf("sender goroutine for udp work connection closed: %v", errRet)
return
}
@@ -191,8 +192,8 @@ func (sv *SUDPVisitor) worker(workConn net.Conn, firstPacket *msg.UDPPacket) {
}
}
go workConnReaderFn(workConn)
go workConnSenderFn(workConn)
go workConnReaderFn(payloadConn)
go workConnSenderFn(payloadConn)
wg.Wait()
xl.Infof("sudp worker is closed")