From 4ed377e36ec2f385484d12e516faf88516fad31c Mon Sep 17 00:00:00 2001 From: Hannes Frederic Sowa Date: Sat, 21 Sep 2013 06:32:34 +0200 Subject: [PATCH] net: neighbour: use source address of last enqueued packet for solicitation Currently we always use the first member of the arp_queue to determine the sender ip address of the arp packet (or in case of IPv6 - source address of the ndisc packet). This skb is fixed as long as the queue is not drained by a complete purge because of a timeout or by a successful response. If the first packet enqueued on the arp_queue is from a local application with a manually set source address and the to be discovered system does some kind of uRPF checks on the source address in the arp packet the resolving process hangs until a timeout and restarts. This hurts communication with the participating network node. This could be mitigated a bit if we use the latest enqueued skb's source address for the resolving process, which is not as static as the arp_queue's head. This change of the source address could result in better recovery of a failed solicitation. Cc: "David S. Miller" Cc: Julian Anastasov Reviewed-by: Julian Anastasov Signed-off-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- Reading git-format-patch failed