RE: BufferException with large messages

["Abarbanel, David \(US SSA\)" <david.abarbanel@xxxxxxxxxxxxxx>]

I looked into this and unfortunately have been unable to reproduce the
problem.  I assume you are using esnacc v1.7 with the 1.7.3 patch?
Could you provide a sample ASN.1 definition that has hit this problem
while data is being decoded.

Thanks,

Dave Abarbanel
BAE Systems

-----Original Message-----
From: owner-imc-snacc@xxxxxxxxxxxx [mailto:owner-imc-snacc@xxxxxxxxxxxx]
On Behalf Of Braumann Andreas
Sent: Wednesday, August 09, 2006 8:28 AM
To: imc-snacc@xxxxxxx
Subject: BufferException with large messages


Hi there,

we stumbled upon a problem in the asn-buf.cpp file whereas a
BufferException is raised in line 371 if we send very large ASN.1
messages (several KB). This problem doesn't seem to appear with small
messages.

The exception is raised more often while calling BDec on the buffer but
sometimes on the PutSegRvs call on the buffer.

We found that the problem is not always reproducible, but the larger the
messages, the more often it occurs (up to the point where it appears
with almost every message). With messages in the 100s bytes size, it
appears approximately 50% of the time, in the 1000s bytes size 90% of
the time, in the 10s bytes size it didn't occur yet.

We are wondering if we are the only ones having these problems. Is this
a bug in the buffer? We tried to include the fix from July 7, 2005, but
to no avail. 

What's interesting is that when we catch the BufferException and don't
do anything with it everything seems to continue normally (message is
successfully decoded and so on), so currently we catch all those
Exceptions and don't handle them and it works. Still it would be nice to
get some insights.

Andreas Braumann
Synergis