site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com On Mar 9, 2007, at 12:57 AM, Jones Curtis wrote: On Mar 9, 2007, at 03.43.27, Michael Smith wrote: Thanks for the reply. -josh _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... This email sent to site_archiver@lists.apple.com It's my understanding that advisory forms of the kernel's routing policy decisions are not exported to userspace. There are good reasons for this; not the least of which being that between obtaining such advice and actually committing to a decision based on that advice, the validity of the advice may expire due to changes in the system's topology. I realise this doesn't help you much, but telling the future is a tough business. 8( The conditions under which the system's topology might change (DHCP server says to, user unplugs ethernet cable, cordless phone/ microwave interferes with wireless network and causes loss of connectivity, etc.) are all possibilities I'll have to live with. Knowing the future would certainly be helpful, but I'm content with knowing how it would proceed if it were to happen presently. Is there no KPI interface for asking the routing table for the gateway ip address for a given destination address? I think you want a routing socket (AF_ROUTE). I'm not familiar with the details of how routing sockets work, but I'll bet there is some good code in the route command. Check to see how "route get" works. smime.p7s