From: Patrick McHardy <kaber@trash.net>
To: David Howells <dhowells@redhat.com>
Cc: netdev@vger.kernel.org
Subject: Re: How to find I/F to destination
Date: Fri, 04 May 2007 15:00:01 +0200 [thread overview]
Message-ID: <463B2E51.90808@trash.net> (raw)
In-Reply-To: <5484.1178282928@redhat.com>
David Howells wrote:
> I would like to determine through which interface packets sent to a particular
> UDP destination will go through, and so determine the MTU size for that
> interface. Can anyone suggest a good way of doing this from within the
> kernel?
Do a route lookup (ip_route_output_key), then either use dst_mtu to get
the PMTU value or dst->dev in case you really want the device's MTU.
prev parent reply other threads:[~2007-05-04 13:00 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-04 12:48 How to find I/F to destination David Howells
2007-05-04 12:54 ` Evgeniy Polyakov
2007-05-04 13:04 ` David Howells
2007-05-04 13:06 ` David Howells
2007-05-04 13:08 ` David Howells
2007-05-04 13:16 ` Evgeniy Polyakov
2007-05-04 13:24 ` David Howells
2007-05-04 13:29 ` Evgeniy Polyakov
2007-05-04 13:33 ` David Howells
2007-05-04 13:43 ` Patrick McHardy
2007-05-04 13:55 ` David Howells
2007-05-04 13:59 ` Patrick McHardy
2007-05-05 9:13 ` Evgeniy Polyakov
2007-05-05 9:15 ` Evgeniy Polyakov
2007-05-04 13:20 ` Evgeniy Polyakov
2007-05-04 13:23 ` David Howells
2007-05-04 13:25 ` Evgeniy Polyakov
2007-05-04 13:00 ` Patrick McHardy [this message]
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