func (s *Session) handleBind(stream conn.Conn, bind *proto.Bind) (err error) {
stream.Debug("Binding new tunnel: %v", bind)
respond := func(resp *proto.BindResp) {
if err = proto.WriteMsg(stream, resp); err != nil {
err = stream.Error("Failed to send bind response: %v", err)
}
}
if err = s.hooks.OnBind(s, bind); err != nil {
return
}
t, err := newTunnel(bind, s, s.binders, s.tunnelHooks)
if err != nil {
respond(&proto.BindResp{Error: err.Error()})
return
}
t.Info("Registered new tunnel on session %s", s.id)
// add it to the list of tunnels
s.addTunnel(t)
// acknowledge success
respond(&proto.BindResp{Url: t.url})
return
}
func (s *Session) handleStream(stream conn.Conn) {
defer s.recoverPanic("Session.handleStream")
defer stream.Close()
// make sure we only process streams while we're not shutting down
if err := s.guard.Enter(); err != nil {
stream.Error("Failing stream, session is shutting down")
return
}
defer s.guard.Exit()
raw, err := proto.ReadMsg(stream)
if err != nil {
stream.Error("Failed to read message: %v")
go s.Shutdown()
return
}
switch msg := raw.(type) {
case *proto.Bind:
err = s.handleBind(stream, msg)
case *proto.Unbind:
err = s.handleUnbind(stream, msg)
default:
err = fmt.Errorf("Unknown message type: %v", reflect.TypeOf(raw))
}
if err != nil {
stream.Error("Error on stream: %v", err)
go s.Shutdown()
return
}
return
}
func (t *Tunnel) handlePublic(publicConn conn.Conn) {
defer publicConn.Close()
defer t.recoverPanic("Tunnel.handlePublic")
publicConn.Info("New connection from %v", publicConn.RemoteAddr())
// connection hook
if err := t.hooks.OnConnectionOpen(t, publicConn); err != nil {
t.Error("OnConnectionOpen hook failed: %v", err)
return
}
startTime := time.Now()
// open a proxy stream
proxyConn, err := t.sess.openProxy(publicConn.RemoteAddr().String(), t.url)
if err != nil {
t.Error("Failed to open proxy connection: %v", err)
return
}
defer proxyConn.Close()
// join the public and proxy connections
bytesIn, bytesOut := conn.Join(publicConn, proxyConn)
if err = t.hooks.OnConnectionClose(t, publicConn, time.Now().Sub(startTime), bytesIn, bytesOut); err != nil {
t.Error("OnConnectionClose hook failed: %v", err)
return
}
}
func WriteMsg(c conn.Conn, msg interface{}) (err error) {
buffer, err := Pack(msg)
if err != nil {
return
}
c.Debug("Writing message: %s", string(buffer))
if err = binary.Write(c, binary.LittleEndian, int64(len(buffer))); err != nil {
return
}
if _, err = c.Write(buffer); err != nil {
return
}
return
}
func readMsgShared(c conn.Conn) (buffer []byte, err error) {
c.Debug("Waiting to read message")
var sz int64
err = binary.Read(c, binary.LittleEndian, &sz)
if err != nil {
return
}
c.Debug("Reading message with length: %d", sz)
buffer = make([]byte, sz)
if _, err = io.ReadFull(c, buffer); err != nil {
return
}
c.Debug("Read message %s", buffer)
return
}