Date: Fri, 03 Apr 2009 09:02:29 -0700 From: Julian Elischer <julian@elischer.org> To: Luiz Otavio O Souza <lists.br@gmail.com> Cc: freebsd-hackers@freebsd.org, Lawrence Stewart <lstewart@freebsd.org> Subject: Re: Setting the mss for socket Message-ID: <49D63315.6050108@elischer.org> In-Reply-To: <64D5D9E633734200A603D067ED5A81E9@adnote989> References: <3FD46C21A487490FB15B89E890790121@adnote989> <49d5c0de.E5bkeKr%2Bp%2Bfg4K00%perryh@pluto.rain.com> <64D5D9E633734200A603D067ED5A81E9@adnote989>
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Luiz Otavio O Souza wrote: >>> Is there a way to set the mss for a socket ? Like you can do >>> in linux with setsockopt(TCP_MAXSEG) ? >>> >>> So i can set the maximum size of packets (or sort of) from a >>> simple userland program. >> >> Depending on exactly what you need to accomplish, you may >> find something useful in this thread from last August in >> freebsd-questions@ >> >> setting the other end's TCP segment size > > Very informative thread, thanks. > > This thread show me that TCP_MAXSEG is implemented in freebsd but don't > work. You can set the setsockopt(IPPROTO_TCP, TCP_MAXSEG), wich will set > the > tp->t_maxseg, but this value is recalculated at tcp_input, so in short, you > cannot set the max segment size for a socket. > > I've posted a completly wrong patch (from style point-of-view - and using > SOL_SOCKET instead of IPPROTO_TCP), but with that patch i'm able to set the > mss in iperf. this thread shoud be in FreeBSD-net@ so tha the right people see it many developers do not read hackers every day as it tends to overload them. > > Many thanks, > Luiz > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
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