Route messages

Bjoern A. Zeeb bz at
Tue Jul 1 09:25:07 UTC 2008

On Tue, 1 Jul 2008, Bjoern A. Zeeb wrote:


> On Tue, 1 Jul 2008, Andre Oppermann wrote:
> Hi,
>> Mike Tancsa wrote:
>>> I am thinking
>>> is the commit ? If I revert to the prev version, the issue goes away.
> Ha, I finally know why I ended up on Cc: of a thread I had no idea
> about. Someone could have told me instead of blindly adding me;-)
>> Yes, this change doesn't look right.  It should only do the route
>> lookup in ip_input.c when there was an EMSGSIZE error returned by
>> ip_output().  The rtalloc_ign() call causes the message to be sent
>> because it always sets report to one.  The default message is RTM_MISS.
>> I'll try to prep an updated patch which doesn't have these issues later
>> today.
> Yeah my bad. Sorry.
> If you do that, do not do an extra route lookup if possible, correct
> the rtalloc call. Thanks.

So I had a very quick look at the code between doing something else.
I think the only change needed is this if I am not mistaken but my
head is far away nowhere close enough in this code.

Andre, could you review this?

Index: sys/netinet/ip_input.c
RCS file: /shared/mirror/FreeBSD/r/ncvs/src/sys/netinet/ip_input.c,v
retrieving revision 1.332.2.2
diff -u -p -r1.332.2.2 ip_input.c
--- sys/netinet/ip_input.c      22 Apr 2008 12:02:55 -0000 1.332.2.2
+++ sys/netinet/ip_input.c      1 Jul 2008 09:23:08 -0000
@@ -1363,7 +1363,6 @@ ip_forward(struct mbuf *m, int srcrt)
          * the ICMP_UNREACH_NEEDFRAG "Next-Hop MTU" field described in RFC1191.
         bzero(&ro, sizeof(ro));
-       rtalloc_ign(&ro, RTF_CLONING);

         error = ip_output(m, NULL, &ro, IP_FORWARDING, NULL, NULL);

Bjoern A. Zeeb              Stop bit received. Insert coin for new game.

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