netdev - [PATCH net-next v2] ipv6: enable anycast addresses as source addresses in ICMPv6 error messages

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Date:	Sun, 19 Jan 2014 17:00:36 +0100
From:	Francois-Xavier Le Bail <fx.lebail@...oo.com>
To:	netdev@...r.kernel.org
Cc:	David Stevens <dlstevens@...ibm.com>,
	Bill Fink <billfink@...dspring.com>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki Yoshifuji <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	Francois-Xavier Le Bail <fx.lebail@...oo.com>
Subject: [PATCH net-next v2] ipv6: enable anycast addresses as source addresses in ICMPv6 error messages

- Uses ipv6_anycast_destination() in icmp6_send().

Suggested-by: Bill Fink <billfink@...dspring.com>
Signed-off-by: Francois-Xavier Le Bail <fx.lebail@...oo.com>
---
v2: Consideration of a Hannes's concern : No sysctl is needed for this change.
    No need for a new check function.

 net/ipv6/icmp.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 902405d..f81f596 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -413,7 +413,8 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
 	 */
 	addr_type = ipv6_addr_type(&hdr->daddr);
 
-	if (ipv6_chk_addr(net, &hdr->daddr, skb->dev, 0))
+	if (ipv6_chk_addr(net, &hdr->daddr, skb->dev, 0) ||
+	    ipv6_anycast_destination(skb))
 		saddr = &hdr->daddr;
 
 	/*
--
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