From owner-freebsd-net  Mon Jun 11 15:23:47 2001
Delivered-To: freebsd-net@freebsd.org
Received: from prism.flugsvamp.com (cb58709-a.mdsn1.wi.home.com [24.17.241.9])
	by hub.freebsd.org (Postfix) with ESMTP id 49BEC37B427
	for <net@freebsd.org>; Mon, 11 Jun 2001 15:23:31 -0700 (PDT)
	(envelope-from jlemon@flugsvamp.com)
Received: (from jlemon@localhost)
	by prism.flugsvamp.com (8.11.0/8.11.0) id f5BMMMB05570;
	Mon, 11 Jun 2001 17:22:22 -0500 (CDT)
	(envelope-from jlemon)
Date: Mon, 11 Jun 2001 17:22:22 -0500 (CDT)
From: Jonathan Lemon <jlemon@flugsvamp.com>
Message-Id: <200106112222.f5BMMMB05570@prism.flugsvamp.com>
To: bright@rush.net, net@freebsd.org
Subject: Re: finding ifp from inpcb
X-Newsgroups: local.mail.freebsd-net
In-Reply-To: <local.mail.freebsd-net/20010611163307.O1832@superconductor.rush.net>
Organization: 
Cc: 
Sender: owner-freebsd-net@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-net.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo?subject=subscribe%20freebsd-net>
List-Unsubscribe: <mailto:majordomo?subject=unsubscribe%20freebsd-net>
X-Loop: FreeBSD.org

In article <local.mail.freebsd-net/20010611163307.O1832@superconductor.rush.net> you write:
>If I have an inpcb and an packet what's the best way to send
>out the packet via the inpcb's interface?  I think I want to
>call ether_output_frame, but I can't figure out how to get
>the ifp from the inpcb.

PCB's don't have interfaces, but (depending on the protocol), they
may have routes.  For TCP, for example, you may be able to use the
cached route in the PCB (if it exists) in order to send the packet:

        struct tcpcb *tp;
        struct route *ro;

        ro = &tp->t_inpcb->inp_route;

        ip_output(m, NULL, ro, ipflags, NULL);

-- 
Jonathan

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-net" in the body of the message