From 37013fd1482d2cd6d2ecc331f7c8388aac7e3c51 Mon Sep 17 00:00:00 2001
From: Richard Fuchs <rfuchs@sipwise.com>
Date: Thu, 16 Aug 2012 15:53:57 +0000
Subject: [PATCH] IPv6 socket requires IPv4 PKTINFO for setting source address
 correctly

---
 daemon/call.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/daemon/call.c b/daemon/call.c
index d7a1590a1..190f6eacd 100644
--- a/daemon/call.c
+++ b/daemon/call.c
@@ -287,6 +287,7 @@ forward:
 			mh.msg_name = &sin;
 			mh.msg_namelen = sizeof(sin);
 
+ipv4_src:
 			ch->cmsg_len = CMSG_LEN(sizeof(*pi));
 			ch->cmsg_level = IPPROTO_IP;
 			ch->cmsg_type = IP_PKTINFO;
@@ -307,6 +308,9 @@ forward:
 			mh.msg_name = &sin6;
 			mh.msg_namelen = sizeof(sin6);
 
+			if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr))
+				goto ipv4_src;
+
 			ch->cmsg_len = CMSG_LEN(sizeof(*pi6));
 			ch->cmsg_level = IPPROTO_IPV6;
 			ch->cmsg_type = IPV6_PKTINFO;