netdev - [PATCH 2/2] net: make ipv6 PKTINFO honour freebind

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Message-Id: <1320713842-21152-2-git-send-email-zenczykowski@gmail.com>
Date:	Mon,  7 Nov 2011 16:57:22 -0800
From:	Maciej Żenczykowski <zenczykowski@...il.com>
To:	Maciej Żenczykowski <maze@...gle.com>
Cc:	netdev@...r.kernel.org,
	Maciej Żenczykowski <maze@...gle.com>
Subject: [PATCH 2/2] net: make ipv6 PKTINFO honour freebind

From: Maciej Żenczykowski <maze@...gle.com>

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@...gle.com>
---
 net/ipv6/datagram.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index e248069..83037af 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;
-- 
1.7.3.1

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