[Ns-bugs] [Bug 78] OLSR & ascii tracing triggers assertion: packet-metadata.cc, line=1043, cond="GetTotalSize () == data.GetSize ()"

[bugzilla-daemon@nsnam-www.ece.gatech.edu]

http://www.nsnam.org/bugzilla/show_bug.cgi?id=78





------- Comment #1 from gjcarneiro at gmail.com  2007-09-24 10:48 -------
It seems this bug in particular is caused by PacketMetadata::Enable () being
called in the middle of a simulation, after the first packet was sent.  In my
example I was starting the OLSR agents before enabling ascii tracing.

Explanation: the OLSR agent receives a packet, creates a subset of the packet,
and later retransmits it to other nodes, it happens in this case that it
receives a packet with no metadata, and tries to re-transmit it with new
prepended headers, thereby triggering the assertion, because by then we have a
packet with only partial metadata.

I'll try to come up with a patch to detect this particular case and give a
clear error message explaining what to do (calling PacketMetadata::Enable () at
the top solves this problem).


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