serverside pings

--HG--
branch : nmdc-ircfrontend

server.go

@@ -98,13 +98,19 @@ func (s *Server) RunWorker() {
 
 		buf := make([]byte, CLIENT_READ_BUFFSIZE)
 
+		s.clientConn.SetReadDeadline(time.Now().Add(CLIENT_KEEPALIVE_EVERY * time.Second))
 		ln, err := s.clientConn.Read(buf)
+
 		if err != nil {
 			if err == io.EOF {
 				break // abandon thread
 			}
 
 			// If this was a /timeout/, send a KA and continue.
+			if libnmdc.CheckIsNetTimeout(err) {
+				s.writeClient("PING :" + s.name)
+				continue
+			}
 
 			// But otherwise, it was a real error (e.g. unexpected disconnect)
 			s.verboseln(err.Error())

typedefs.go

@@ -24,9 +24,9 @@ const (
 	BLESSED_CHANNEL      = "#chat" // must be lowercase
 	BLESSED_CHANNEL_MODE = "n"     // means that you have to be in the channel to chat, but that's it
 
-	NICKS_PER_PROTOMSG      = 128 //The capacity sets the max number of nicks to send per message
+	NICKS_PER_PROTOMSG     = 128 // Max number of nicks to send per message
 	CLIENT_READ_BUFFSIZE   = 512
-	CLIENT_READ_TIMEOUT_SEC = 3
+	CLIENT_KEEPALIVE_EVERY = 60 // should be longer than the client's one, hexchat is 30s
 )
 
 type replyCode int