Re: ip_nat_irc bug?

David S. Miller (davem@redhat.com)
Mon, 10 Dec 2001 11:14:34 -0800 (PST)


From: Ido Diamant <ido@the.linux-dude.net>
Date: Mon, 10 Dec 2001 12:52:11 +0200 (IST)

After compiling kernel 2.4.16, I'v seen that I can't dcc chat bots
running on my local computer. I tried to see why its happening, and
couldn't get into any reasonable idea.
Yesterday I remembered that I compiled the 2.4.16 with the ip_nat_irc
module, and loaded it by default with my firewall. I rmmod ip_nat_irc and
suddenly I could dcc chat my local bots.
Q. Why is it happening?
Q. Am I using this module correctly? as far as I know, I just need to load
the module, and thats it, am I wrong? should I create some kind of rule
for it?
Q. Is it bug?

This patch fixes the bug:

diff -u --recursive --new-file --exclude=CVS --exclude=.cvsignore ../vanilla/2.4/linux/net/ipv4/netfilter/ip_nat_irc.c linux/net/ipv4/netfilter/ip_nat_irc.c
--- ../vanilla/2.4/linux/net/ipv4/netfilter/ip_nat_irc.c Tue Oct 30 15:08:12 2001
+++ linux/net/ipv4/netfilter/ip_nat_irc.c Sat Dec 8 19:23:27 2001
@@ -1,8 +1,8 @@
/* IRC extension for TCP NAT alteration.
- * (C) 2000 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2000-2001 by Harald Welte <laforge@gnumonks.org>
* based on a copy of RR's ip_nat_ftp.c
*
- * ip_nat_irc.c,v 1.15 2001/10/22 10:43:53 laforge Exp
+ * ip_nat_irc.c,v 1.16 2001/12/06 07:42:10 laforge Exp
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -81,7 +81,7 @@
}

newdstip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
- newsrcip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
+ newsrcip = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
DEBUGP("nat_expected: DCC cmd. %u.%u.%u.%u->%u.%u.%u.%u\n",
NIPQUAD(newsrcip), NIPQUAD(newdstip));

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/