Date: Tue, 18 May 2004 02:43:46 -0700 From: Luigi Rizzo <rizzo@icir.org> To: Pawel Jakub Dawidek <pjd@freebsd.org> Cc: freebsd-net@freebsd.org Subject: Re: ia_netbroadcast Message-ID: <20040518024346.A5068@xorpc.icir.org> In-Reply-To: <20040518092439.GF845@darkness.comp.waw.pl>; from pjd@freebsd.org on Tue, May 18, 2004 at 11:24:39AM %2B0200 References: <20040518092439.GF845@darkness.comp.waw.pl>
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On Tue, May 18, 2004 at 11:24:39AM +0200, Pawel Jakub Dawidek wrote: > Hi. > > Do we still need ia_netboradcast field? It is calculated depending on > old-fashion classes (A, B, C). Is it used still? > I wonder if ia_broadaddr isn't sufficient today. not just that, it seems that ia_netboradcast contains bogus info. This said, how do you plan to handle the alias search, by implementing a per-interface hash table containing the addresses and broadcast addresses ? cheers luigi > IP netmask ia_broadaddr ia_netbroadcast > 10.0.0.101 255.0.0.0 10.255.255.255 10.255.255.255 > 1.0.0.2 255.255.255.252 1.0.0.3 1.255.255.255 > 2.0.0.1 255.255.0.0 2.0.255.255 2.255.255.255 > > I'm planing to work on removing O(n) from interface aliases search. > Now every incoming packet have to be compared with every single > broadcast from every single alias. When I tested something and > there were ~10000 aliases on interface it worked really slow. > > This slowdown probably exists in more places. It exists in NetBSD and > OpenBSD as well. > > -- > Pawel Jakub Dawidek http://www.FreeBSD.org > pjd@FreeBSD.org http://garage.freebsd.pl > FreeBSD committer Am I Evil? Yes, I Am!
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