Date: Wed, 28 May 2008 13:19:07 +0300 From: Stefan Lambrev <stefan.lambrev@moneybookers.com> To: =?UTF-8?B?RXJtYWwgTHXDp2k=?= <ermal.luci@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: Adjust Maximum Segment Size? Message-ID: <483D319B.7030303@moneybookers.com> In-Reply-To: <9a542da30805271114w6ad82569m43d89c4cd03a76fc@mail.gmail.com> References: <1211891010.00075594.1211880013@10.7.7.3> <1211894613.00075634.1211884201@10.7.7.3> <1211901827.00075710.1211890802@10.7.7.3> <483C4636.7080608@mavhome.dp.ua> <483C4D48.6020106@moneybookers.com> <9a542da30805271114w6ad82569m43d89c4cd03a76fc@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Ermal Lu=C3=A7i wrote: > On Tue, May 27, 2008 at 8:04 PM, Stefan Lambrev > <stefan.lambrev@moneybookers.com> wrote: > =20 >> Greetings, >> >> Alexander Motin wrote: >> =20 >>> Stefan Lambrev wrote: >>> =20 >>>>> Yes, You can with ng_tcpmss >>>>> =20 >>>> Isn't it doable only with ipfw/divert when using ng_tcpmss? >>>> I have and some concerns about performance too .. >>>> =20 >>> There are several ways to inject packet to ng_tcpmss: >>> - ipfw + divert + ng_ksocket. It should be faster then usual user-le= vel >>> implementation >>> - ipfw + netgraph as described in ng_tcpmss(4) >>> - use ng_tcpmss directly in some complicated netgraph setup. For exa= mple, >>> mpd is able to use it. This is probably the fastest and easiest way, = but >>> only for some setups. >>> =20 >> Thanks for all ideas. >> I think I'll try the route -mtu feature. >> Looks like easier for implementation and testing. :) >> Anyway it will be good if we have such feature in the base system. >> It shouldn't be very difficult? :) >> >> -- >> =20 > > Actually converting ng_tcpmss to pfil(9) should be easy. > =20 I'm thinking about adding additional checks in tcp_mss() and=20 tcp_mssopt() - both in sys/netinet/tcp_input.c plus two sysctl entries for max mss and max mss IPv6. Does it sound like a reasonable solution or I'm missing something? P.S. One of the things that bothers me is that pf uses it's own=20 pf_get_mss() and pf_calc_mss() and they should be fixed accordingly? --=20 Best Wishes, Stefan Lambrev ICQ# 24134177
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?483D319B.7030303>