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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>
This commit is contained in:
Eric W. Biederman 2009-05-19 18:27:17 +00:00 committed by David S. Miller
parent ca0f31125c
commit d95ed9275e
2 changed files with 9 additions and 2 deletions
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1
include/linux/if_packet.h
View File

@ -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

10
net/packet/af_packet.c
View File

@ -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;