Date: Mon, 07 Feb 2000 21:27:04 +0000 From: Brian Somers <brian@Awfulhak.org> To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> Cc: "gbnaidu " <gbnaidu@my-Deja.com>, freebsd-net@freebsd.org, brian@hak.lan.Awfulhak.org Subject: Re: How to get outgoing interface... Message-ID: <200002072127.VAA03499@hak.lan.Awfulhak.org> In-Reply-To: Message from Garrett Wollman <wollman@khavrinen.lcs.mit.edu> of "Mon, 07 Feb 2000 11:42:26 EST." <200002071642.LAA27059@khavrinen.lcs.mit.edu>
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> <<On Sun, 06 Feb 2000 21:17:21 -0800, "gbnaidu " <gbnaidu@my-Deja.com> said: > > [Paragraph reformatted for legibility. In the future, please press > return at the end of each 72-character line.] > > > I am trying to dump the routing table using the sysctl system > > call. I am able to get the destination address, gateway, mask all > > these entries. But How do I get the outgoing interface for a > > particular entry in the routing table? > > Keep on looking in the routing message. A typical response will look > like this: > > sockaddrs: <DST,GATEWAY,NETMASK,IFP,IFA> > default anacreon default fxp0:0.a0.c9.3c.76.5c khavrinen > > You have found the first three sockaddrs in the message; the RTA_IFP > sockaddr will tell you which interface is being used, and the RTA_IFA > one will tell you the IP address configured on that interface. FWIW an example can be found in src/usr.sbin/ppp/route.c - clearer (but less functional) than the ifconfig sources IMHO. > -GAWollman > > -- > Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same > wollman@lcs.mit.edu | O Siem / The fires of freedom > Opinions not those of| Dance in the burning flame > MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick -- Brian <brian@Awfulhak.org> <brian@FreeBSD.org> <http://www.Awfulhak.org> <brian@OpenBSD.org> Don't _EVER_ lose your sense of humour ! <brian@FreeBSD.org.uk> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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