Date: Thu, 1 Jan 1998 20:30:24 +0100 From: J Wunsch <j@uriah.heep.sax.de> To: Brian Somers <brian@awfulhak.org> Cc: John-Mark Gurney <gurney_j@efn.org>, freebsd-bugs@hub.freebsd.org, freebsd-hackers@freebsd.org Subject: Re: kern/5404: slXX slip (tun & ppp) interfaces always point to point Message-ID: <19980101203024.48956@uriah.heep.sax.de> In-Reply-To: <199801011819.SAA19774@awfulhak.demon.co.uk>; from Brian Somers on Thu, Jan 01, 1998 at 06:19:50PM %2B0000 References: <19980101185007.59283@uriah.heep.sax.de> <199801011819.SAA19774@awfulhak.demon.co.uk>
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As Brian Somers wrote: > > Why? Proxyarping is done on the Ethernet interface, and this one > > still has a netmask. > > I mean in the sense that the client cannot broadcast on the network > at the other end of the pointopoint link, or can it ? Broadcast relaying is IMHO not supported. > could set up a static route for the broadcast address. That should > work. I haven't tried. Hmm, maybe this would work. > > Nope, you can't. `p2p' is an unchangeable attribute of an interface, > > see IFF_CANTCHANGE in /sys/net/if.h. > > Perhaps IFF_POINTOPOINT should be settable while the interface is > down only. Why? After all, this interface _is_ point-to-point. Allowing to change this from userland is stupid. Maybe allowing it for tunX would make sense under some circumstances, but running PPP over it really mandates it to have IFF_POINTOPOINT set. ProxyARP itself is already a big hack i would discourage except of a few cases. Don't give the people the feeling they could solve all their problems by proxyarping half of the Internet. :) We should rather encourage people in setting up a clean routing than in setting up hack^2's. (Btw., the worst i've seen so far is HP's internal network. This is just one big hack, at least the part i've seen.) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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