handle terminating the libnmdc connection

--HG--
branch : nmdc-ircfrontend

server.go

@@ -17,6 +17,7 @@ type Server struct {
 	client           *Client
 	channel          Channel // Single blessed channel
 	upstreamLauncher libnmdc.HubConnectionOptions
+	upstreamCloser   chan struct{}
 	upstream         *libnmdc.HubConnection
 	motd             string
 }
@@ -33,6 +34,7 @@ func NewServer(name string, upstream libnmdc.HubAddress) *Server {
 			Address: upstream,
 			Self:    *self,
 		},
+		upstreamCloser: make(chan struct{}, 1),
 		channel: Channel{
 			clientMap: make(map[string]*Client),
 			modeMap:   make(map[string]*ClientMode),
@@ -60,6 +62,9 @@ func (s *Server) RunClient(conn net.Conn) {
 		if err != nil {
 			if err == io.EOF {
 				s.client.disconnect()
+				if s.client != nil && s.client.registered {
+					s.upstreamCloser <- struct{}{}
+				}
 				return // FIXME cleanup
 			}
 			continue
@@ -98,7 +103,8 @@ func (s *Server) ProtocolReadLoop_NMDC(closeChan chan struct{}) {
 	for {
 		select {
 		case <-closeChan:
-			// Need some way of deliberately shutting down a libnmdc connection...
+			// Abandon the upstream connection
+			s.upstream.Disconnect()
 			return
 
 		case hubEvent := <-s.upstream.OnEvent: