Route messages

Mike Tancsa mike at
Wed Jul 2 13:46:42 UTC 2008

At 05:24 AM 7/1/2008, Bjoern A. Zeeb wrote:
>On Tue, 1 Jul 2008, Bjoern A. Zeeb wrote:
>>On Tue, 1 Jul 2008, Andre Oppermann wrote:
>>>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
>>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);

This could also potentially close


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