From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Sun, 31 Jul 2011 09:21:23 -0400
To: 9fans@9fans.net
Message-ID: <a9103dbe9c4bfb38c48c0fadd5ef7c6b@brasstown.quanstro.net>
In-Reply-To: <86tya3tuj8.fsf@cmarib.ramside>
References: <86tya3tuj8.fsf@cmarib.ramside>
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Subject: Re: [9fans] Plan 9 IPv4 router
Topicbox-Message-UUID: 09112536-ead7-11e9-9d60-3106f5b1d025

> Does anybody know if it's possible to use Plan 9 as an IPv4 router?

plan 9 does a fine job of routing ip4 packets.  i used plan 9
to do that for a 4 months recently during a network renumbering.

if you do this, make sure you've made this revert to ip.c.  the
sources version has both lines, which is harmless but redundant.

minooka; diff -c /n/dump/2010/0930/sys/src/9/ip/ip.c /n/dump/2010/0820/sys/src/9/ip/ip.c
/n/dump/2010/0930/sys/src/9/ip/ip.c:463,469 - /n/dump/2010/0820/sys/src/9/ip/ip.c:463,469
  		}

  		/* don't forward to source's network */
- 		memset(&conv, 0, sizeof conv);
+ 		conv.r = nil;
  		r = v4lookup(f, h->dst, &conv);
  		if(r == nil || r->ifc == ifc){
  			ip->stats[OutDiscards]++;

- erik