From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: Re: IP stack question (how to force pkts to not route locally, but go out interfaces regardless of destination) Date: Tue, 27 Aug 2002 23:25:58 -0700 Sender: netdev-bounce@oss.sgi.com Message-ID: <3D6C6CF6.9040002@candelatech.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit Cc: "Bloch, Jack" , "'netdev@oss.sgi.com'" Return-path: To: jamal Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org jamal wrote: > Ben Wrote: >>I would actually like to be able to force a machine to not do local >>routing as well, and force packets out over an interface even if >>the destination is a local IP, using source-based-routing, >>or something similar. There is no way to do this currently? >> > > > Try that SO_DONTROUTE and see if solves your problem; you probably have to > bind the socket to a specific device as well; > For all that trouble, i would suggest you may just as well write a sock > packet based app. I am back to trying to figure out how to make this work. I'm tried source based routing, and it does not work (it routes internally). I read the help on SO_DONTROUTE, but it seems to make the kernel not able to send to a router. I would like to be able to route, ie port a -> router -> port b I already bind to a particular port and IP, and use policy based routing (source based routing) to make sure the packet is sent out the correct local interface. I just need to find the routing logic that notices the destination IP is local and tell it to quit looking (probably for a particular socket, as I can see how this could break applications who didn't expect it) I dug through the code once before looking for this, and didn't find what I needed. Can anyone suggest the right files and/or methods to look in? Thanks, Ben > > cheers, > jamal > -- Ben Greear President of Candela Technologies Inc http://www.candelatech.com ScryMUD: http://scry.wanfear.com http://scry.wanfear.com/~greear