Date: Sat, 18 Oct 2014 14:39:19 +0900 (JST) From: Hiroki Sato <hrs@FreeBSD.org> To: prabhakar.lakhera@gmail.com Cc: freebsd-net@freebsd.org Subject: Re: IPv6 stacks responds to all node link local multicast NS Message-ID: <20141018.143919.1930138986692891609.hrs@allbsd.org> In-Reply-To: <CALg%2BrhVZFc=vE%2BnZS-hsm%2BUc54kZwzO6N8qThG9uv%2Be-e2uh5w@mail.gmail.com> References: <CALg%2BrhVZFc=vE%2BnZS-hsm%2BUc54kZwzO6N8qThG9uv%2Be-e2uh5w@mail.gmail.com>
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----Security_Multipart(Sat_Oct_18_14_39_19_2014_503)-- Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit prabhakar lakhera <prabhakar.lakhera@gmail.com> wrote in <CALg+rhVZFc=vE+nZS-hsm+Uc54kZwzO6N8qThG9uv+e-e2uh5w@mail.gmail.com>: pr> This probably is more of a compliance issue (or may be not as the NS pr> receipt section of RFC 4861 http://tools.ietf.org/html/rfc4861#page-62 does pr> not talk about it). pr> pr> The neighbor solicitation message format says this: pr> pr> http://tools.ietf.org/html/rfc4861#page-22 pr> pr> pr> Destination Address pr> Either the solicited-node multicast address pr> corresponding to the target address, or the target pr> address. pr> pr> pr> Is it safe to assume that this is a MUST? pr> If yes, nd6_ns_input right now only checks if the destination is a pr> multicast or not (the check is more strict for DAD NS packets) and pr> therefore allows all node link local multicast address resolution NS pr> packets and process them completely (creates neighbor cache, responds pr> with NA etc). What is the problem when accepting NS messages to ff02::1? -- Hiroki ----Security_Multipart(Sat_Oct_18_14_39_19_2014_503)-- Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEABECAAYFAlRB/QcACgkQTyzT2CeTzy05zgCfX7tp1YrsWIoqhmlsFh6RMWxQ Sy4AnRvygNCEvFSxPu38aPZFFBiDdNoj =cslZ -----END PGP SIGNATURE----- ----Security_Multipart(Sat_Oct_18_14_39_19_2014_503)----
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