On Wed, 2009-04-15 at 19:05 +0000, Miquel van Smoorenburg wrote: > Use recvmsg with IP_PKTINFO. For each packet received you'll also > get information about the destination IP address and thus the interface > it was received on. > > See for example src/lib/udpfromto.c from freeradius, > http://github.com/alandekok/freeradius-server/blob/e67f2acf5c6f5f33e6a66d4bf344931274394986/src/lib/udpfromto.c And to track what IPs and what interfaces there are, use netlink socket to get updates when interfaces are reconfigured/added/removed. -- Jeremy Jackson Coplanar Networks (519)489-4903 http://www.coplanar.net jerj@xxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
