Hi Is there a way to either: Find the real ifindex/ifname a mac-address is bound to or Find the real ifindex/ifname of an incoming packet ? I am writing a dhcp server and need to know what real interface the dhcp request packet came from. An acceptable solution would be to get the interface by the mac-address, but that can be faked so I would rather get the interface by knowing where the data actually came from. Data is IP, UDP broadcast. I _could_ use raw sockets. The problem is when I do that, the program is using ~8% cpu on a 3.2ghz xeon64 just reading packets without doing anything due to the amount of traffic passing through the box (~200mbit and increasing) so that doesn't look like a good idea. brctl showmacs returns a list of port numbers, but they dont make much sense to me. They do not seem to be in the same order I added the interfaces? Is there a mapping here? Example, jorgen@ams41:/$ /tmp/brctl showmacs test0 port no mac addr is local? ageing timer 2 00:04:e2:a8:3b:d7 no 0.24 1 00:08:a1:85:39:fd no 17.31 133 00:0d:88:a3:61:4a no 9.90 1 00:14:22:b0:cd:e0 yes 0.00 133 00:16:c7:f5:8f:e2 no 0.48 Port 133 is the 901'th interface (0x385) I added to bridge test0. What does 133 point to? The ifindex of this physical interface is 912 (0x390) (retrieved with SIOCGIFINDEX). Secondly, I seem to be unable to add more than around 1024 interfaces to a single bridge. Is there a way to increase this limit? I am using linux kernel 2.6 Thanks a million, Joergen -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.osdl.org/pipermail/bridge/attachments/20060221/c16fa824/attachment.htm
