[OLSR-users] interaction between mobile ipv6 and olsr

[Magesh mannar]

Hi

Hopefully this trace might give you a hint.

let me explain my scenario

I have 2 nodes running olsrd (downloaded from the cvs
last wee

n1----n2

n1 and n2 are neighbors. Whilst starting olsrd, both
have ipv6 address assigned. The routing works fine 

Now i change the ipv6 address on the interface (eth1)
on which the olsrd is running. olsrd on which the
address is changed (n1) crashes. 

To my understanding, olsrd probes the interface and
get the new ip address and  tries to schedule events.
The it crashes with seg fault. When i do bt, it says
program no longer exists and no stack
I have attached my gdb trace file as well. 


This problem seem to exist for a long time. Might be
some data structure is not getting intiliased
properly.

Probably, this is also related to the ignacio's
problem

If you need more details,i can provide you

Magesh
 




Now

--- Andreas Tønnesen <(spam-protected)> wrote:

> 
> We would really like to have this issue fixed in
> 0.4.10. If the
> core dump is too much trouble a gdb backtrace would
> also be
> of help.
> Here are some easy steps:
> 
> gdb olsrd
> run
> 
> Now when olsrd crashes do
> bt
> 
> and post the output of the entire session on the
> list. Also the
> configuration file would be useful. If you could use
> the current
> CVS version that would be even better!
> This would be really helpfull :-) If others have
> seen the same
> issue, feel free to reply to this.
> 
> - Andreas
> 
> Andreas Tønnesen wrote:
> > Hi Ignacio,
> > 
> > Thanks for reporting this. Here is Thomas' core
> dump recepy, could
> > you follow it and post the files?
> > Thanks.
> > 
> > - Andreas
> > 
> > 1. Change to the olsrd source code directory.
> > 
> > 2. Say "make uberclean; make" to force a complete
> rebuild
> > and to build olsrd.
> > 
> > 3. Do NOT say "make install". "make install" would
> strip the debug symbols
> > from the compiled executable and from the plug-ins
> in order to reduce the
> > size of the executables and the plug-ins. But we
> need the debug symbols.
> > 
> > 4. Manually copy the olsrd executable and the
> plug-in .so files(if you
> > use any) to the appropriate directories.
> ("/usr/sbin" and "/usr/lib" by
> > default)
> > 
> > 5. You now have an olsrd executable with debug
> information and plug-ins
> > with debug information installed.
> > 
> > 6. Say "ulimit -c unlimited". This will allow
> olsrd to dump core.
> > 
> > 7. Run olsrd and make it crash.
> > 
> > 8. Create a TAR of the (1) olsrd executable, (2)
> the plug-in .so files,
> > (3) the core file, and send it to me. This will
> enable me to find out
> > where exactly the crash happens.
> > 
> > Thanks,
> > -Thomas
> > 
> > Ignacio García Pérez wrote:
> > 
> >> Hi,
> >>
> >> I'm using olsrd 0.4.9, and noticed that when I
> take down an interface
> >> that is part of the mesh, it segfaults most of
> the time. This is the
> >> last it shows with the debug verbosity on:
> >>
> >> ************** TABLES ****************
> >> Routing table:
> >> ROUTING TABLE
> >> DESTINATION     NEXT HOP
> >> Old table:
> >> ROUTING TABLE
> >> DESTINATION     NEXT HOP
> >> **************************************
> >> Updating kernel routes...
> >> Updating kernel HNA routes...
> >> HNA table:
> >> ROUTING TABLE
> >> DESTINATION     NEXT HOP
> >> mid set: 13:05:59.709971
> >> 10.50.2.1:  10.50.2.40
> >>
> >> DUP TABLE:
> >>
> >>
> >> --- 13:05:59.70
> -------------------------------------------------
> HNA SET
> >>
> >> IP net          netmask         GW IP
> >>
> >> --- 13:05:59.70
> ----------------------------------------------------
> 
> >> LINKS
> >>
> >> IP address       hyst   LQ     lost   total  NLQ 
>   ETX
> >> 10.50.2.40       0.000  0.000  0      0     
> 0.000  0.00
> >>
> >> --- 13:05:59.70
> ------------------------------------------------ 
> >> NEIGHBORS
> >>
> >> IP address       LQ     NLQ    SYM   MPR   MPRS 
> will
> >> Segmentation fault
> >>
> >>
> >>
> >> Nacho.
> >>
> >>
> >>
> >> _______________________________________________
> >> olsr-users mailing list
> >> (spam-protected)
> >> https://www.olsr.org/mailman/listinfo/olsr-users
> > 
> > 
> 
> -- 
> Andreas Tønnesen
> http://www.olsr.org
> http://www.tønnesen.org
> 
> _______________________________________________
> olsr-users mailing list
> (spam-protected)
> https://www.olsr.org/mailman/listinfo/olsr-users
> 


	
		
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