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authorEric Leblond <eric@regit.org>2012-08-17 02:02:58 +0400
committerDavid S. Miller <davem@davemloft.net>2012-08-20 13:37:29 +0400
commitc0de08d04215031d68fa13af36f347a6cfa252ca (patch)
tree7352576a55b5ceb586e3f73c9f66be890b8bccca /include
parent9915e67eb1134b4710a4888a3e041c757869e0e2 (diff)
downloadlinux-c0de08d04215031d68fa13af36f347a6cfa252ca.tar.xz
af_packet: don't emit packet on orig fanout group
If a packet is emitted on one socket in one group of fanout sockets, it is transmitted again. It is thus read again on one of the sockets of the fanout group. This result in a loop for software which generate packets when receiving one. This retransmission is not the intended behavior: a fanout group must behave like a single socket. The packet should not be transmitted on a socket if it originates from a socket belonging to the same fanout group. This patch fixes the issue by changing the transmission check to take fanout group info account. Reported-by: Aleksandr Kotov <a1k@mail.ru> Signed-off-by: Eric Leblond <eric@regit.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/netdevice.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 3560d688161e..59dc05f38247 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1522,6 +1522,8 @@ struct packet_type {
struct sk_buff **(*gro_receive)(struct sk_buff **head,
struct sk_buff *skb);
int (*gro_complete)(struct sk_buff *skb);
+ bool (*id_match)(struct packet_type *ptype,
+ struct sock *sk);
void *af_packet_priv;
struct list_head list;
};