Date: Fri, 21 Mar 2008 17:35:17 +1100 From: Peter Jeremy <peterjeremy@optushome.com.au> To: Alireza Torabi <alireza.torabi@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: bpf packet capture and SOCK_STREAM socket redirects... Message-ID: <20080321063517.GK85901@server.vk2pj.dyndns.org> In-Reply-To: <cffd8c580803200427u62d8d3b9q208364a8a96de7ba@mail.gmail.com> References: <cffd8c580803192006g4045258bxcf8fa10b322a640@mail.gmail.com> <cffd8c580803200243u4465889m197d2a7ca6d0fff7@mail.gmail.com> <slrnfu4g5d.1b5e.vadim_nuclight@hostel.avtf.net> <cffd8c580803200357l686d6e40qb49b3ecadb734151@mail.gmail.com> <slrnfu4hm4.1b5e.vadim_nuclight@hostel.avtf.net> <cffd8c580803200427u62d8d3b9q208364a8a96de7ba@mail.gmail.com>
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--69pVuxX8awAiJ7fD Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Mar 20, 2008 at 11:27:53AM +0000, Alireza Torabi wrote: >Imagine this: > > | (1) > packets > | | (4) > [nic1] [nic2] > bpf SOCK_STREAM > | (2) | > [FreeBSD] (3) > >1) all user traffic are being monitored >2) bpf on [nic] is capturing these packets >3) after processing we know a connection is about to be established from A= to B > >NOW: >4) I want to deliver this packet to the socket on [nic2] >and as this is a tcp socket it'll take care of it from there >(my code here for this sockets sends and arbitary data to A making it >think it came from B) Have a look at divert(4). I suspect it comes closest to what you want. --=20 Peter Jeremy Please excuse any delays as the result of my ISP's inability to implement an MTA that is either RFC2821-compliant or matches their claimed behaviour. --69pVuxX8awAiJ7fD Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.8 (FreeBSD) iEYEARECAAYFAkfjVyUACgkQ/opHv/APuIeSYwCbBRTRNgeMWCPUcaJQzR2j4PS/ Rw0AnRnVjwm57vmmj1fxoPMncQhIK050 =/whQ -----END PGP SIGNATURE----- --69pVuxX8awAiJ7fD--
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