From owner-freebsd-net@FreeBSD.ORG  Tue Feb 16 22:32:33 2010
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 1E898106566B
	for <freebsd-net@freebsd.org>; Tue, 16 Feb 2010 22:32:33 +0000 (UTC)
	(envelope-from martin.lopreiato@gmail.com)
Received: from mail-iw0-f175.google.com (mail-iw0-f175.google.com
	[209.85.223.175])
	by mx1.freebsd.org (Postfix) with ESMTP id DF1B78FC17
	for <freebsd-net@freebsd.org>; Tue, 16 Feb 2010 22:32:32 +0000 (UTC)
Received: by iwn5 with SMTP id 5so2753261iwn.9
	for <freebsd-net@freebsd.org>; Tue, 16 Feb 2010 14:32:32 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:mime-version:received:date:message-id:subject
	:from:to:content-type;
	bh=R7NHNbvrL4rRKnYiNiqn/x7NLrlIaM+gh4V5BEesB58=;
	b=psGSSuY25xJ6cX54DvLjSZ8PyHCHFSq0zHSjq9rhWnRGxul3JrEQGXm9f0vT3G92mi
	Rdx5I2DcUqQrs5FGn1qqrPih+KhPT2NmiZA3lAZOQS5nb+5eb6GoYSbnNDNs/H9aNR2l
	JdnnskEHynzwIm5ZdCUFy/GJWRkqq9kmvdjU0=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=mime-version:date:message-id:subject:from:to:content-type;
	b=myR+19uGyewjrshBnU41JSRDng7ymv5DEjFDu3Lxgq6/X6lGjjOHJ7QdT/xMV2wIed
	VBrYzKDTZUmHeBmEzej/GJbHvC2ouBXLXB/jekET0m3ItQDmT3eEFsrSHUrHE2oY4Ak3
	YHUZxi25RtLRWKBr6bfyZWGkXzlHRiWQTVlKc=
MIME-Version: 1.0
Received: by 10.231.144.15 with SMTP id x15mr11046391ibu.99.1266358169919; 
	Tue, 16 Feb 2010 14:09:29 -0800 (PST)
Date: Tue, 16 Feb 2010 19:09:29 -0300
Message-ID: <e51d9a111002161409i33162be5v74c024533973a22d@mail.gmail.com>
From: Martin Lopreiato <martin.lopreiato@gmail.com>
To: freebsd-net@freebsd.org
Content-Type: text/plain; charset=ISO-8859-1
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Subject: Forging ipv6 addresses?
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 16 Feb 2010 22:32:33 -0000

hello,

i want to send a packet with a forged ipv6 address. i tried using
sendmsg() with ancilliary data, but it seems I can only select an
address that has been configured on my system. if I select an
arbitrary ipv6 address that i want to forge, i get "can't assign
requested address" (in freebsd). isn't it possible to forge an ipv6 address
with sendmsg()?

note: if i use a configured address, my code works perfectly. so the
error message i'm getting when trying to forge an ipv6 address does
not seem to be related to a bug in my code.
thnx,
/m