Is it normal behaviour of the IP stack that it DOES NOT process ARP replies that do not result from requests sent by that stack itself? Or do I have something misconfigured? See below. I need to learn the MAC address of a remote network node in an application executing as 'root' on Linux 2.4.19. Scenario 1) The MAC address IS NOT in the ARP cache, so ioctl() fails. I'm building the ARP request and sending it myself thru a packet socket. That's OK. And the reply is received from the destination node. However... the IP stack on my machine doesn't seem to handle the ARP reply! The resulting MAC address IS STILL NOT in the cache! ioctl() still fails! Scenario 2) (obvious) I'm sending a piece of data through a plain datagram socket to the remote node, my stack handles the ARP resolution on my behalf and I after that I can see the resulting MAC address in the cache. I sniffed the ARP frames in both scenarios and undoubtedly they are byte-after-byte the same. _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web! - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
