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From: "Hervé Poussineau" <hpoussin@reactos.org>
To: qemu-devel@nongnu.org
Cc: "Hervé Poussineau" <hpoussin@reactos.org>
Subject: [Qemu-devel] [PATCH] [slirp] Accept packets with TTL=1
Date: Mon, 13 Sep 2010 23:01:30 +0200	[thread overview]
Message-ID: <1284411690-3557-1-git-send-email-hpoussin@reactos.org> (raw)

Packets with TTL=1 may be directed to local network (DHCP/DNS servers for example), so don't discard them
This is required by old versions of NetBSD which send DHCP DISCOVER packets with TTL=1

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
---
 slirp/ip_input.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/slirp/ip_input.c b/slirp/ip_input.c
index 0fe0ff7..768ab0c 100644
--- a/slirp/ip_input.c
+++ b/slirp/ip_input.c
@@ -144,7 +144,7 @@ ip_input(struct mbuf *m)
 	   m_adj(m, ip->ip_len - m->m_len);
 
 	/* check ip_ttl for a correct ICMP reply */
-	if(ip->ip_ttl==0 || ip->ip_ttl==1) {
+	if(ip->ip_ttl==0) {
 	  icmp_error(m, ICMP_TIMXCEED,ICMP_TIMXCEED_INTRANS, 0,"ttl");
 	  goto bad;
 	}
-- 
1.7.1.GIT

             reply	other threads:[~2010-09-13 21:03 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-13 21:01 Hervé Poussineau [this message]
2010-09-14 15:47 ` [Qemu-devel] [PATCH] [slirp] Accept packets with TTL=1 Edgar E. Iglesias
2010-09-17 10:52 ` Edgar E. Iglesias

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