From 9c05c19cce18b5ca0b89ef3ce212ce9b20e164d4 Mon Sep 17 00:00:00 2001
From: Jilles Tjoelker <jilles@stack.nl>
Date: Wed, 21 May 2008 23:00:10 +0200
Subject: [PATCH] Reject u@@h klines.

---
 modules/m_kline.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/modules/m_kline.c b/modules/m_kline.c
index c4557002..fd9a2059 100644
--- a/modules/m_kline.c
+++ b/modules/m_kline.c
@@ -589,8 +589,9 @@ find_user_host(struct Client *source_p, const char *userhost, char *luser, char
 static int
 valid_user_host(struct Client *source_p, const char *luser, const char *lhost)
 {
-	/* # is invalid, as is '!' (n!u@h kline) */
-	if(strchr(lhost, '#') || strchr(luser, '#') || strchr(luser, '!'))
+	/* # is invalid, as are '!' (n!u@h kline) and '@' (u@@h kline) */
+	if(strchr(lhost, '#') || strchr(luser, '#') || strchr(luser, '!') ||
+			strchr(lhost, '@'))
 	{
 		sendto_one_notice(source_p, ":Invalid K-Line");
 		return 0;