Date: Mon, 1 Sep 2008 17:37:07 +0530 From: "Debarshi Ray" <debarshi.ray@gmail.com> To: "FreeBSD networking and TCP/IP list" <freebsd-net@freebsd.org> Subject: reading routing table Message-ID: <3170f42f0809010507q6c37a9d5q19649bc261d7656d@mail.gmail.com>
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I am implementing a library/utility which basically encompasses the features of the traditional route utilities and those of newer tools (like ip from iproute2), which are mostly specific to a particular kernel. The overpowering objective is to make the library/utility work uniformly across all different kernels, so that programs like NetworkManager have a portable library/utility to use instead of the Linux-kernel specific ip which is now being used. I was going through the FreeBSD and NetBSD documentation and the FreeBSD sources of netstat and route. I was suprised to see that while NetBSD's route implementation has a 'show' command, FreeBSD does not offer any such thing. Moreover it seems that one can not read the entire routing table using the PF_ROUTE sockets and RTM_GET returns information pertaining to only one destination. This suprised me because one can do such a thing with the Linux kernel's RTNETLINK. Is there a reason why this is so? Or is reading from /dev/kmem the only way to get a dump of the routing tables? Thanks, Debarshi
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