Re: [mpls-linux-general] Re: Ethereal crashes immediately

[James R. L. <jl...@mi...>]

I don't know what to tell you.  'It works for me' (tm)

[root@simian root]# more /etc/fedora-release
Fedora Core release 2 (Tettnang)
[root@simian root]# uname -a
Linux simian 2.6.9-1.6_FC2mpls_1_940a #1 Fri Dec 31 02:15:10 CST 2004 i686 i686 i386 GNU/Linux
[root@simian root]# rpm -qa | grep tcpdump
tcpdump-3.8.2-6.FC2.1
[root@simian root]# echo 0 > /sys/mpls/debug
[root@simian root]# tcpdump -i wlan0 ether proto 0x8847
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), capture size 96 bytes
21:50:20.457809 MPLS (label 17, exp 0, [S], ttl 64), IP, length: 88
21:50:21.458779 MPLS (label 17, exp 0, [S], ttl 64), IP, length: 88
21:50:22.458645 MPLS (label 17, exp 0, [S], ttl 64), IP, length: 88

There is nothing new in 1.940a compared to 1.938.  Try doing a strace
on tcpdump and see what happens.  Try turning off name resolution with the -nn
switch.

On Mon, Jan 03, 2005 at 11:02:46AM -0800, murat wrote:
> Hi all.
>  
> I've got a bit more specific info on when ethereal crashes.That is when I just create an incomming label with the following line only ( without creating outgoing label, adding route...):
>  
> root# mplsadm2 -A -I gen:16:0
>  
>  That line only is enough to make ethereal crashing.
> When I remove the label with:
>  
> root# mplsadm2 -D -I gen:16:0
>  
> ethereal works again. The same problem with tcpdump.
>  
> I'm writing a thesis (time pressure) and have to use a cost free sniffer. If there are any alternatives please tell me. The best would be to make ethereal work.
>  
> Again many thanks in advance and regards.
>  
>  
> Original mail from 2004-12-31:
> Hello guys,
>   
>  I use FC 2, kernel 2.6.8-1, mpls-linux 1.938, Ethereal 0.10.7. Everything installed like
> described at mpls-linux.
>  Problem is Ethereal. It works when I capture IP packets. It crashes as soon as I want to
> capture MPLS packets. 
>  I set a path between two routers (/proc/sys/net/ipv4/ip_forward = 1): 
>  mplsadm2 -A -O 0
>  mplsadm2 O 0x2 -o push:gen:16:set:eth0:ipv4:192.168.30.2
>  ip route add 192.168.30.0/24 via 192.168.30.2 spec_nh 0x8847 0x2
>  mplsadm2 -A -I gen:17:0
>   
>  mplsadm2 -A -O 0
>  mplsadm2 O 0x2 -o push:gen:17:set:eth1:ipv4:192.168.30.1
>  ip route add 192.168.30.0/24 via 192.168.30.1 spec_nh 0x8847 0x2
>  mplsadm2 -A -I gen:16:0
>  
>   
>  Now when I start ethereal, and klick "Edit-Preferences" or "Capture-Start" - ethereal
> crashes immediately, the messege in the terminal is "Aborted".
>  Etereal works again when I delete the path.
>   
>  Thanks for any help in advance and regards.
> 
>  
> 
> 		
> ---------------------------------
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-- 
James R. Leu
jl...@mi...