degesch: fix IPv6:port in irc_split_host_port()

degesch.c

@@ -5642,25 +5642,27 @@ irc_finish_connection (struct server *s, int socket, const char *hostname)
 	refresh_prompt (s->ctx);
 }
 
+/// Unwrap IPv6 addresses in format_host_port_pair() format
 static void
 irc_split_host_port (char *s, char **host, char **port)
 {
-	// FIXME: this won't work if this is an IPv6 address w/o a port
+	*host = s;
-	char *colon = strrchr (s, ':');
+	*port = "6667";
+
+	char *right_bracket = strchr (s, ']');
+	if (s[0] == '[' && right_bracket)
+	{
+		*right_bracket = '\0';
+		*host = s + 1;
+		s = right_bracket + 1;
+	}
+
+	char *colon = strchr (s, ':');
 	if (colon)
 	{
 		*colon = '\0';
-		*port = ++colon;
+		*port = colon + 1;
 	}
-	else
-		*port = "6667";
-
-	// Unwrap IPv6 addresses in format_host_port_pair() format
-	size_t host_end = strlen (s) - 1;
-	if (*s == '[' && s[host_end] == ']')
-		s++[host_end] = '\0';
-
-	*host = s;
 }
 
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