minor update
This commit is contained in:
rui.zheng
parent
40b22c4805
commit
be68f616aa
104
gost/forward.go
104
gost/forward.go
@ -82,7 +82,7 @@ func (h *udpForwardHandler) Handle(conn net.Conn) {
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}
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} else {
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var err error
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cc, err = h.getUDPTunnel()
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cc, err = getSOCKS5UDPTunnel(h.options.Chain)
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if err != nil {
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log.Logf("[udp] %s - %s : %s", conn.LocalAddr(), h.raddr, err)
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return
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@ -97,40 +97,6 @@ func (h *udpForwardHandler) Handle(conn net.Conn) {
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log.Logf("[udp] %s >-< %s", conn.RemoteAddr(), h.raddr)
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}
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func (h *udpForwardHandler) getUDPTunnel() (net.Conn, error) {
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conn, err := h.options.Chain.Conn()
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if err != nil {
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return nil, err
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}
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cc, err := socks5Handshake(conn, h.options.Chain.LastNode().User)
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if err != nil {
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conn.Close()
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return nil, err
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}
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conn = cc
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conn.SetWriteDeadline(time.Now().Add(WriteTimeout))
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if err = gosocks5.NewRequest(CmdUDPTun, nil).Write(conn); err != nil {
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conn.Close()
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return nil, err
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}
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conn.SetWriteDeadline(time.Time{})
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conn.SetReadDeadline(time.Now().Add(ReadTimeout))
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reply, err := gosocks5.ReadReply(conn)
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if err != nil {
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conn.Close()
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return nil, err
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}
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conn.SetReadDeadline(time.Time{})
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if reply.Rep != gosocks5.Succeeded {
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conn.Close()
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return nil, errors.New("UDP tunnel failure")
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}
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return conn, nil
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}
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type rtcpForwardHandler struct {
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raddr string
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options *HandlerOptions
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@ -542,7 +508,7 @@ func (l *rtcpForwardListener) Accept() (net.Conn, error) {
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if max := 6 * time.Second; tempDelay > max {
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tempDelay = max
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}
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log.Logf("[ssh-rtcp] Accept error: %v; retrying in %v", err, tempDelay)
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log.Logf("[rtcp] Accept error: %v; retrying in %v", err, tempDelay)
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time.Sleep(tempDelay)
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continue
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}
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@ -619,9 +585,9 @@ func (l *rtcpForwardListener) Close() error {
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}
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type rudpForwardListener struct {
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addr net.Addr
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addr *net.UDPAddr
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chain *Chain
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close chan struct{}
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closed chan struct{}
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}
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// RUDPForwardListener creates a Listener for UDP remote port forwarding server.
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@ -634,62 +600,52 @@ func RUDPForwardListener(addr string, chain *Chain) (Listener, error) {
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return &rudpForwardListener{
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addr: laddr,
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chain: chain,
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close: make(chan struct{}),
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closed: make(chan struct{}),
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}, nil
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}
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func (l *rudpForwardListener) Accept() (net.Conn, error) {
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select {
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case <-l.close:
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case <-l.closed:
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return nil, errors.New("closed")
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default:
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}
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conn, err := l.chain.Conn()
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var tempDelay time.Duration
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for {
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conn, err := l.accept()
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if err != nil {
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return nil, err
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if tempDelay == 0 {
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tempDelay = 1000 * time.Millisecond
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} else {
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tempDelay *= 2
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}
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cc, err := l.handshake(conn)
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if err != nil {
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conn.Close()
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return nil, err
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if max := 6 * time.Second; tempDelay > max {
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tempDelay = max
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}
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conn = cc
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return cc, nil
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log.Logf("[rudp] Accept error: %v; retrying in %v", err, tempDelay)
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time.Sleep(tempDelay)
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continue
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}
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func (l *rudpForwardListener) handshake(conn net.Conn) (net.Conn, error) {
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conn, err := socks5Handshake(conn, l.chain.LastNode().User)
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if err != nil {
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return nil, err
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}
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req := gosocks5.NewRequest(CmdUDPTun, toSocksAddr(l.addr))
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if err := req.Write(conn); err != nil {
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log.Log("[rudp] SOCKS5 UDP relay request: ", err)
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return nil, err
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}
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conn.SetReadDeadline(time.Now().Add(ReadTimeout))
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rep, err := gosocks5.ReadReply(conn)
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if err != nil {
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log.Log("[rudp] SOCKS5 UDP relay reply: ", err)
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return nil, err
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}
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conn.SetReadDeadline(time.Time{})
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if rep.Rep != gosocks5.Succeeded {
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log.Logf("[rudp] bind on %s failure: %d", l.addr, rep.Rep)
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return nil, fmt.Errorf("Bind on %s failure", l.addr.String())
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}
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log.Logf("[rudp] BIND ON %s OK", rep.Addr)
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return conn, nil
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}
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}
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func (l *rudpForwardListener) accept() (conn net.Conn, err error) {
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lastNode := l.chain.LastNode()
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if lastNode.Protocol == "socks5" {
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conn, err = getSOCKS5UDPTunnel(l.chain)
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} else {
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conn, err = net.ListenUDP("udp", l.addr)
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}
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return
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}
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func (l *rudpForwardListener) Addr() net.Addr {
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return l.addr
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}
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func (l *rudpForwardListener) Close() error {
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close(l.close)
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close(l.closed)
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return nil
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}
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@ -872,23 +872,6 @@ func (h *socks5Handler) handleUDPTunnel(conn net.Conn, req *gosocks5.Request) {
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log.Logf("[socks5-udp] %s >-< %s [tun]", conn.RemoteAddr(), cc.RemoteAddr())
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}
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func socks5Handshake(conn net.Conn, user *url.Userinfo) (net.Conn, error) {
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selector := &clientSelector{
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TLSConfig: &tls.Config{InsecureSkipVerify: true},
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User: user,
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}
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selector.AddMethod(
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gosocks5.MethodNoAuth,
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gosocks5.MethodUserPass,
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MethodTLS,
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)
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cc := gosocks5.ClientConn(conn, selector)
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if err := cc.Handleshake(); err != nil {
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return nil, err
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}
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return cc, nil
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}
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func (h *socks5Handler) tunnelServerUDP(cc net.Conn, uc *net.UDPConn) (err error) {
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errc := make(chan error, 2)
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@ -1073,3 +1056,54 @@ func (h *socks4Handler) handleBind(conn net.Conn, req *gosocks4.Request) {
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transport(conn, cc)
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log.Logf("[socks4-bind] %s >-< %s", conn.RemoteAddr(), cc.RemoteAddr())
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}
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func getSOCKS5UDPTunnel(chain *Chain) (net.Conn, error) {
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conn, err := chain.Conn()
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if err != nil {
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return nil, err
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}
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cc, err := socks5Handshake(conn, chain.LastNode().User)
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if err != nil {
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conn.Close()
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return nil, err
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}
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conn = cc
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conn.SetWriteDeadline(time.Now().Add(WriteTimeout))
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if err = gosocks5.NewRequest(CmdUDPTun, nil).Write(conn); err != nil {
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conn.Close()
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return nil, err
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}
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conn.SetWriteDeadline(time.Time{})
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conn.SetReadDeadline(time.Now().Add(ReadTimeout))
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reply, err := gosocks5.ReadReply(conn)
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if err != nil {
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conn.Close()
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return nil, err
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}
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conn.SetReadDeadline(time.Time{})
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if reply.Rep != gosocks5.Succeeded {
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conn.Close()
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return nil, errors.New("UDP tunnel failure")
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}
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return conn, nil
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}
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func socks5Handshake(conn net.Conn, user *url.Userinfo) (net.Conn, error) {
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selector := &clientSelector{
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TLSConfig: &tls.Config{InsecureSkipVerify: true},
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User: user,
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}
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selector.AddMethod(
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gosocks5.MethodNoAuth,
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gosocks5.MethodUserPass,
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MethodTLS,
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)
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cc := gosocks5.ClientConn(conn, selector)
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if err := cc.Handleshake(); err != nil {
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return nil, err
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}
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return cc, nil
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}
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