Hi, I am trying to develop a source routed mobile IP solution, and I am encountering the following problem: I have to route a packet (skb) thru a particular output interface (=wlan0), which I know will take me to destination, However my routing table suggests a route through another interface (=eth0). I am using ip_route_output_key, with fl->oif = index of device I want this packet to go to(=wlan0). However, in the ip_route_output_slow I found that even when oif is not 0, you get a valid dev_out, however when the fib_lookup succeeds, you merely free this old dev_out, and assign dev_out to the res.dev (ie the one found out by the fib_lookup == eth0), So this means that even if I specify the oif of wlan0, the packet will still still get routed thru eth0. Correct ? Am I missing something?. I am also setting tos bit RTO_ONLINK , as is done when MSG_DONTROUTE is given for udp and raw sockets, hoping that it would make a difference, by having the scope set to the RT_SCOPE_LINK. Please help me. I am quite hung up on this one. Sincerely, -- Devesh Agrawal -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/