From owner-freebsd-current  Fri Apr  7 11:33:44 2000
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From: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net>
Message-Id: <200004071833.LAA41098@gndrsh.dnsmgr.net>
Subject: Re: Overwhelming messages from /sys/netinet/if_ether.c
In-Reply-To: <XFMail.000407115204.ak03@gte.com> from "Alexander N. Kabaev" at "Apr 7, 2000 11:52:04 am"
To: ak03@gte.com (Alexander N. Kabaev)
Date: Fri, 7 Apr 2000 11:33:29 -0700 (PDT)
Cc: dmmiller@cvzoom.net (Donn Miller), current@FreeBSD.ORG
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> The message in question can be extremely useful in case there is IP address
> clash on the local network. I suggest we just change the code in question to
> ignore clashes over 0.0.0.0 address only.

No, don't do that, anyone arping 0.0.0.0 on any network around here
I sure as heck want to know about it asap!  Someone someplace on
that stupid telco's DSL bridged network is mis-configured and
sending out arp messages for the 0 addresses.  Easy enough to
cause though:

ifconfig xx0 0.0.0.0 up

should do the trick...


> On 07-Apr-00 Donn Miller wrote:
> > Since I started using a cable modem and dhclient, my system has been
> > literally overwhelmed with messages like:
> > 
> > /kernel: arp: xx:xx:xx:xx:xx:xx is using my IP address 0.0.0.0!
> > 
> > Man, these messages were pouring out of syslogd like mad, and my
> > /var/log/messages* files had to be deleted, because they were growing
> > so huge.  There were literally hundreds of these messages pouring out
> > via syslogd per second, and they were coming non-stop.  There were so
> > many messages coming out, my hard drive was overwhelmed until dhclient
> > finally obtain/ed a lease.  That said, I suggest we make the following
> > patch to /sys/netinet/if_ether.c:
> > 
> > --- if_ether.c.orig     Wed Mar 29 02:50:39 2000
> > +++ if_ether.c  Fri Apr  7 11:24:54 2000
> > @@ -554,9 +554,9 @@
> >                 return;
> >         }
> >         if (isaddr.s_addr == myaddr.s_addr) {
> > -               log(LOG_ERR,
> > +               /* log(LOG_ERR,
> >                    "arp: %6D is using my IP address %s!\n",
> > -                  ea->arp_sha, ":", inet_ntoa(isaddr));
> > +                  ea->arp_sha, ":", inet_ntoa(isaddr)); */
> >                 itaddr = myaddr;
> >                 goto reply;
> >         }
> > 
> > 
> > - Donn
> 
> ----------------------------------
> E-Mail: Alexander N. Kabaev <ak03@gte.com>
> Date: 07-Apr-00
> Time: 11:49:33
> ----------------------------------
> 
> 
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> 


-- 
Rod Grimes - KD7CAX @ CN85sl - (RWG25)               rgrimes@gndrsh.dnsmgr.net


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