From owner-freebsd-net  Tue Feb 19  7:10:53 2002
Delivered-To: freebsd-net@freebsd.org
Received: from hanoi.cronyx.ru (hanoi.cronyx.ru [144.206.181.53])
	by hub.freebsd.org (Postfix) with ESMTP id C258237B400
	for <freebsd-net@FreeBSD.ORG>; Tue, 19 Feb 2002 07:10:49 -0800 (PST)
Received: by hanoi.cronyx.ru id SAA35184 for freebsd-net@FreeBSD.ORG.checked;
  (8.9.3/vak/2.1) Tue, 19 Feb 2002 18:08:02 +0300 (MSK)
  (envelope-from rik@cronyx.ru)
Received: from cronyx.ru by hanoi.cronyx.ru with ESMTP id SAA35084 for <freebsd-net@FreeBSD.ORG>;
  (8.9.3/vak/2.1) Tue, 19 Feb 2002 18:05:15 +0300 (MSK)
  (envelope-from rik@cronyx.ru)
Message-ID: <3C726A93.6030901@cronyx.ru>
Date: Tue, 19 Feb 2002 18:09:07 +0300
From: Roman Kurakin <rik@cronyx.ru>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.4) Gecko/20011019 Netscape6/6.2
X-Accept-Language: en-us
MIME-Version: 1.0
To: freebsd-net@FreeBSD.ORG
Subject: Bpf interface discussion
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
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@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-net>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-net>
X-Loop: FreeBSD.org

Hi

    I found one problem. Current bpf interface allows to work only with 
one link layer type
during interface life time, but some network drivers such as SPPP or 
NETGRAPH support
many link layer types and link layer type could be changed during 
interface life time.

    I suggest to add new function to bpf interface like this:

void bpfsetdlt (struct ifnet *ifp, u_int dlt) {
    struct bpf_if    *bp;
    for (bp = bpf_iflist; bp != NULL; bp = bp->bif_next) {
        if (ifp == bp->bif_ifp)
            break;
    }
    if (!bp)
        return;
    bp->bif_dlt = dlt;
}

Best regards,
                        Roman Kurakin





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