From 91ac8e99a3d839c7abc32acd383807779b2ab56d Mon Sep 17 00:00:00 2001
From: itojun <itojun@FreeBSD.org>
Date: Thu, 22 Jun 2000 16:48:59 +0000
Subject: [PATCH] correct bad TTL with packets generated by v4 mapped udp. from
 kame

---
 sys/netinet6/udp6_usrreq.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sys/netinet6/udp6_usrreq.c b/sys/netinet6/udp6_usrreq.c
index abcac276ece0..b42bc1817202 100644
--- a/sys/netinet6/udp6_usrreq.c
+++ b/sys/netinet6/udp6_usrreq.c
@@ -647,6 +647,13 @@ udp6_attach(struct socket *so, int proto, struct proc *p)
 	inp->inp_vflag |= INP_IPV6;
 	inp->in6p_hops = -1;	/* use kernel default */
 	inp->in6p_cksum = -1;	/* just to be sure */
+	/*
+	 * XXX: ugly!!
+	 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
+	 * because the socket may be bound to an IPv6 wildcard address,
+	 * which may match an IPv4-mapped IPv6 address.
+	 */
+	inp->inp_ip_ttl = ip_defttl;
 #ifdef IPSEC
 	error = ipsec_init_policy(so, &inp->in6p_sp);
 	if (error != 0) {