handleWebsocket is responsible for handling the websocket connection
(w http.ResponseWriter, req *http.Request)
| 49 | |
| 50 | // handleWebsocket is responsible for handling the websocket connection |
| 51 | func (s *Server) handleWebsocket(w http.ResponseWriter, req *http.Request) { |
| 52 | id := atomic.AddInt32(&s.sessCount, 1) |
| 53 | l := s.Fork("session#%d", id) |
| 54 | wsConn, err := upgrader.Upgrade(w, req, nil) |
| 55 | if err != nil { |
| 56 | l.Debugf("Failed to upgrade (%s)", err) |
| 57 | return |
| 58 | } |
| 59 | conn := cnet.NewWebSocketConn(wsConn) |
| 60 | // perform SSH handshake on net.Conn |
| 61 | l.Debugf("Handshaking with %s...", req.RemoteAddr) |
| 62 | sshConn, chans, reqs, err := ssh.NewServerConn(conn, s.sshConfig) |
| 63 | if err != nil { |
| 64 | s.Debugf("Failed to handshake (%s)", err) |
| 65 | return |
| 66 | } |
| 67 | // pull the users from the session map |
| 68 | var user *settings.User |
| 69 | if s.users.Len() > 0 { |
| 70 | sid := string(sshConn.SessionID()) |
| 71 | u, ok := s.sessions.Get(sid) |
| 72 | if !ok { |
| 73 | panic("bug in ssh auth handler") |
| 74 | } |
| 75 | user = u |
| 76 | s.sessions.Del(sid) |
| 77 | } |
| 78 | // chisel server handshake (reverse of client handshake) |
| 79 | // verify configuration |
| 80 | l.Debugf("Verifying configuration") |
| 81 | // wait for request, with timeout |
| 82 | var r *ssh.Request |
| 83 | select { |
| 84 | case r = <-reqs: |
| 85 | case <-time.After(settings.EnvDuration("CONFIG_TIMEOUT", 10*time.Second)): |
| 86 | l.Debugf("Timeout waiting for configuration") |
| 87 | sshConn.Close() |
| 88 | return |
| 89 | } |
| 90 | failed := func(err error) { |
| 91 | l.Debugf("Failed: %s", err) |
| 92 | r.Reply(false, []byte(err.Error())) |
| 93 | } |
| 94 | if r.Type != "config" { |
| 95 | failed(s.Errorf("expecting config request")) |
| 96 | return |
| 97 | } |
| 98 | c, err := settings.DecodeConfig(r.Payload) |
| 99 | if err != nil { |
| 100 | failed(s.Errorf("invalid config")) |
| 101 | return |
| 102 | } |
| 103 | //print if client and server versions dont match |
| 104 | cv := strings.TrimPrefix(c.Version, "v") |
| 105 | if cv == "" { |
| 106 | cv = "<unknown>" |
| 107 | } |
| 108 | sv := strings.TrimPrefix(chshare.BuildVersion, "v") |
no test coverage detected