Function ForwardAgentConnections

agent.go:53–83

ForwardAgentConnections takes connections from a listener to proxy into the session on the OpenSSH channel for agent connections. It blocks and services connections until the listener stop accepting.

(l net.Listener, s Session)

// session on the OpenSSH channel for agent connections. It blocks and services
// connections until the listener stop accepting.
func ForwardAgentConnections(l net.Listener, s Session) {
	sshConn := s.Context().Value(ContextKeyConn).(gossh.Conn)
	for {
		conn, err := l.Accept()
		if err != nil {
			return
		}
		go func(conn net.Conn) {
			defer conn.Close()
			channel, reqs, err := sshConn.OpenChannel(agentChannelType, nil)
			if err != nil {
				return
			}
			defer channel.Close()
			go gossh.DiscardRequests(reqs)
			var wg sync.WaitGroup
			wg.Add(2)
			go func() {
				io.Copy(conn, channel)
				conn.(*net.UnixConn).CloseWrite()
				wg.Done()
			}()
			go func() {
				io.Copy(channel, conn)
				channel.CloseWrite()
				wg.Done()
			}()
			wg.Wait()
		}(conn)
	}
}