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Date: Sun, 28 Oct 2001 20:10:25 -0800 (PST)
From: Igor M Podlesny <poige@morning.ru>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: misc/31575: wrong src ip address for some ICMPs
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>Number:         31575
>Category:       misc
>Synopsis:       wrong src ip address for some ICMPs
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Oct 28 20:20:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Igor M Podlesny
>Release:        4.4
>Organization:
Morning Network Ltd
>Environment:
doesn't matter. it works the same way even on 3.5 and, I suspect, all
releases before and after that.
>Description:
You  might  observe  this  bug doing traceroute  while  standing  behind  a  GW's  interface  with  several IP-addresses  (aliases).  In  this  case  you always got ICMP.TIMXCEED (time  exceeded)  coming  from  IP-address  which  is usually the first on the interface,  even  if  your  box  is  not  using this IP-address as its next-hop.  Despite  of  the  code  selecting right IP-address for this purpose  is  working  well it's being confused by wrong argument it is
being given. This patch (http://www.morning.ru/~poige/patchzone/ip_icmp.c.diff)
fixes namely this problem.

>How-To-Repeat:
You should have several ip-address on interface of NEXT-HOP router
running FreeBSD, then invoke traceroute some.where.
>Fix:
http://www.morning.ru/~poige/patchzone/ip_icmp.c.diff
>Release-Note:
>Audit-Trail:
>Unformatted:

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