From: Maciej Żenczykowski <maze@google.com>
Date: Mon, 7 Nov 2011 14:57:22 +0000 (+0000)
Subject: net: make ipv6 PKTINFO honour freebind
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2563fa595447bba6a73e6c58c4bbf11ac0f28931;p=linux-beck.git

net: make ipv6 PKTINFO honour freebind

This just makes it possible to spoof source IPv6 address on a socket
without having to create and bind a new socket for every source IP
we wish to spoof.

Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index e2480691c220..83037af4fa7b 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -654,7 +654,7 @@ int datagram_send_ctl(struct net *net, struct sock *sk,
 
 			if (addr_type != IPV6_ADDR_ANY) {
 				int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL;
-				if (!inet_sk(sk)->transparent &&
+				if (!(inet_sk(sk)->freebind || inet_sk(sk)->transparent) &&
 				    !ipv6_chk_addr(net, &src_info->ipi6_addr,
 						   strict ? dev : NULL, 0))
 					err = -EINVAL;