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Date:      Tue, 7 Nov 2000 14:02:24 -0800 (PST)
From:      Luigi Rizzo <rizzo@aciri.org>
To:        wollman@khavrinen.lcs.mit.edu (Garrett Wollman)
Cc:        tmoestl@gmx.net, freebsd-net@FreeBSD.ORG, rizzo@aciri.org (Luigi Rizzo)
Subject:   Re: setting source address for UDP packets
Message-ID:  <200011072202.OAA03771@iguana.aciri.org>
In-Reply-To: <200011072156.QAA87433@khavrinen.lcs.mit.edu> from Garrett Wollman at "Nov 7, 2000  4:56:23 pm"

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> > is there any way to set the source address of an UDP (over IPv4) packet
> > without using bind() or changing the socket state,
> 
> No.  This is a long-standing bug.  It shouldn't be too hard to fix if
> you're up to a bit of kernel hacking.

you mean by adding a sendto_from() system call where you also pass
the address for the source ?
Or [really dirty hack here] an extended sendto() where the sockaddr
really points to an array of two addresses (with "tolen" set
accordingly) ?

	cheers
	luigi
----------------------------------+-----------------------------------------
 Luigi RIZZO, luigi@iet.unipi.it  . ACIRI/ICSI (on leave from Univ. di Pisa)
 http://www.iet.unipi.it/~luigi/  . 1947 Center St, Berkeley CA 94704
 Phone: (510) 666 2927
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