From 2c23d4299cef17047bfdf05fa404757eff80719a Mon Sep 17 00:00:00 2001
From: Bram Matthys <syzop@vulnscan.org>
Date: Mon, 30 Dec 2019 19:02:20 +0100
Subject: [PATCH] Send a better error when JOIN is used for a channel without
 hash mark (#). Reported by k4be in
 https://bugs.unrealircd.org/view.php?id=5514

---
 src/channel.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/channel.c b/src/channel.c
index 2641e54b7..a2ce6529a 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -1331,6 +1331,10 @@ void send_invalid_channelname(Client *client, char *channelname)
 {
 	char *reason;
 
+	if (*channelname != '#')
+	{
+		reason = "Channel name must start with a hash mark (#)";
+	} else
 	if (strlen(channelname) > CHANNELLEN)
 	{
 		reason = "Channel name is too long";