From 0d03b4dd26f8a13df2d0458d5fd0cc9e1ce42848 Mon Sep 17 00:00:00 2001
From: Viktor Villainov <supervillain@riseup.net>
Date: Thu, 4 Apr 2019 10:35:40 -0400
Subject: [PATCH] Add IPv6 support: Use net.SplitHostPort

---
 irc.go | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/irc.go b/irc.go
index 9afb00b..de8f6a5 100644
--- a/irc.go
+++ b/irc.go
@@ -428,18 +428,16 @@ func (irc *Connection) Connect(server string) error {
 	if len(irc.Server) == 0 {
 		return errors.New("empty 'server'")
 	}
-	if !strings.HasPrefix("[", irc.Server) && strings.Count(irc.Server, ":") != 1 {
-		return errors.New("wrong number of ':' in address")
-	}
 	if strings.Index(irc.Server, ":") == 0 {
 		return errors.New("hostname is missing")
 	}
 	if strings.Index(irc.Server, ":") == len(irc.Server)-1 {
 		return errors.New("port missing")
 	}
-	// check for valid range
-	substrings := strings.Split(irc.Server, ":")
-	ports := substrings[len(substrings) - 1]
+	_, ports, err := net.SplitHostPort(irc.Server)
+	if err != nil {
+		return errors.New("wrong address string")
+	}
 	port, err := strconv.Atoi(ports)
 	if err != nil {
 		return errors.New("extracting port failed")