Date: Thu, 06 May 2004 21:47:26 +0200 From: Andre Oppermann <andre@freebsd.org> To: Julian Elischer <julian@elischer.org> Cc: freebsd-current@freebsd.org Subject: Re: Default behaviour of IP Options processing Message-ID: <409A964E.2FE5F40E@freebsd.org> References: <Pine.BSF.4.21.0405061218110.82978-100000@InterJet.elischer.org>
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Julian Elischer wrote: > > On Thu, 6 May 2004, Andre Oppermann wrote: > > > I have just committed the attached change to ip_input() to control the > > behaviour of IP Options processing. The default is the unchanged > > current behaviour. > [...] > > routing. The remaining IP Options are RR (record route) and TS (time > > stamp) which are both useless. For finding out which path a packet takes > > we use traceroute instead of RR. Besides that RR is limited to the space > > in the IP Options field and can possibly record only a few hops (9 IIRC). > > Time stamp is useless for the same reason and since it doesn't have a > > fixed and synchronized timebase it is even more so useless. > > > > Opinions? Discussion? Yes/Nay? > > I use RR all the time. > it allows you to record the reverse path, (up to the size limitation). Which won't get you far these days... ;-) > what about inet6 ? do you plan on doing things there? > There are more options defined there.. As far as I am aware IPv6 packets do not have any option space in the packet header. You have header stacking there though which has its own evil implications... -- Andre
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