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authorEric W. Biederman <ebiederm@xmission.com>2009-05-19 18:27:17 +0000
committerDavid S. Miller <davem@davemloft.net>2009-05-21 15:13:39 -0700
commitd95ed9275edcb8995bda31005bb3f55e087626d7 (patch)
treebbaefa252b6e8f7386073ed27fb9c9f3a64cb55f
parentca0f31125c5cf0d48f47c2e1a3785a08876a7e87 (diff)
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af_packet: Teach to listen for multiple unicast addresses.
The the PACKET_ADD_MEMBERSHIP and the PACKET_DROP_MEMBERSHIP setsockopt calls for af_packet already has all of the infrastructure needed to subscribe to multiple mac addresses. All that is missing is a flag to say that the address we want to listen on is a unicast address. So introduce PACKET_MR_UNICAST and wire it up to dev_unicast_add and dev_unicast_delete. Additionally I noticed that errors from dev_mc_add were not propagated from packet_dev_mc so fix that. Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/if_packet.h1
-rw-r--r--net/packet/af_packet.c10
2 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/if_packet.h b/include/linux/if_packet.h
index 5b2badeb949..dea7d6b7cf9 100644
--- a/include/linux/if_packet.h
+++ b/include/linux/if_packet.h
@@ -145,5 +145,6 @@ struct packet_mreq
#define PACKET_MR_MULTICAST 0
#define PACKET_MR_PROMISC 1
#define PACKET_MR_ALLMULTI 2
+#define PACKET_MR_UNICAST 3
#endif
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 766e6b41f7c..c7c5d524967 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1570,9 +1570,9 @@ static int packet_dev_mc(struct net_device *dev, struct packet_mclist *i,
switch (i->type) {
case PACKET_MR_MULTICAST:
if (what > 0)
- dev_mc_add(dev, i->addr, i->alen, 0);
+ return dev_mc_add(dev, i->addr, i->alen, 0);
else
- dev_mc_delete(dev, i->addr, i->alen, 0);
+ return dev_mc_delete(dev, i->addr, i->alen, 0);
break;
case PACKET_MR_PROMISC:
return dev_set_promiscuity(dev, what);
@@ -1580,6 +1580,12 @@ static int packet_dev_mc(struct net_device *dev, struct packet_mclist *i,
case PACKET_MR_ALLMULTI:
return dev_set_allmulti(dev, what);
break;
+ case PACKET_MR_UNICAST:
+ if (what > 0)
+ return dev_unicast_add(dev, i->addr, i->alen);
+ else
+ return dev_unicast_delete(dev, i->addr, i->alen);
+ break;
default:;
}
return 0;