Reply to PING commands with PONG

client.go

@@ -186,6 +186,8 @@ func (c *Client) reply(code replyCode, args ...string) {
 			motd = motd[80:]
 		}
 		c.outputChan <- fmt.Sprintf(":%s 376 %s :End of MOTD Command", c.server.name, c.nick)
+	case rplPong:
+		c.outputChan <- fmt.Sprintf(":%s PONG %s %s", c.server.name, c.nick, c.server.name)
 	case errMoreArgs:
 		c.outputChan <- fmt.Sprintf(":%s 461 %s :Not enough params", c.server.name, c.nick)
 	case errNoNick:

rosella.go

@@ -126,6 +126,7 @@ const (
 	rplInfo
 	rplVersion
 	rplMOTD
+	rplPong
 	errMoreArgs
 	errNoNick
 	errInvalidNick

server.go

@@ -76,6 +76,8 @@ func (s *Server) handleEvent(e Event) {
 func (s *Server) handleCommand(client *Client, command string, args []string) {
 
 	switch command {
+	case "PING":
+		client.reply(rplPong)
 	case "INFO":
 		client.reply(rplInfo, "Rosella IRCD github.com/eXeC64/Rosella")
 	case "VERSION":