[h323plus] Valid sessionID in OpenLogicalChannel command

Simon Horne s.horne at packetizer.com
Mon Dec 28 08:47:44 EST 2009


Igor
 
The problem you are having with the Tandberg T1000 is a tandberg bug. The
endpoint cannot properly renegotiate the OLC on a master/slave conflict. The
H323plus end advises the T1000 that it is master however the T1000 ignores
it causing the conflict. Tandberg may have a firmware update to correct the
problem.
 
Simon

  _____  

From: Igor Pavlov [mailto:pavlov.ig at gmail.com] 
Sent: Monday, 28 December 2009 11:07 PM
To: Simon Horne
Cc: h323plus at lists.packetizer.com
Subject: Re: [h323plus] Valid sessionID in OpenLogicalChannel command


About H.264 plugin - actualy I have 3rd party static library for H.264
encoding/decoding and use H264 plugin as wrapper to connect library to
h323plus. I don't think anyone has interest of half working plugin without
static library...


28 декабря 2009 г. 15:57 пользователь Simon Horne <s.horne at packetizer.com>
написал:


Igor
 
The problem is caused by an master/slave conflict when first opening the
audio channel which results in the OLC being rejected. The correct process
is to renegotiate the OLC. It appears that the T1000 cannot properly
renegotiate the OLC and incorrectly allocates an invalid sessionID of 0
which causes the assert and behavior you highlighted.
 
I also see you are using a modified and working H.264 plugin and have
decided not to contribute any of that work back to the project. This is a
pity.
 
Simon
 


  _____  

From: Igor Pavlov [mailto:pavlov.ig at gmail.com] 
Sent: Monday, 28 December 2009 9:46 PM
To: Simon Horne
Cc: h323plus at lists.packetizer.com
Subject: Re: [h323plus] Valid sessionID in OpenLogicalChannel command


Sending log.
T1000 in most cases after Reject sends OLC with sessionID=0, and in less
cases send OLC with sessionID from 32 up to 53 (increase 1 after each
reject).



2009/12/28 Simon Horne <s.horne at packetizer.com>


Igor
 
Session ID should never be zero. This is clearly an error coming from the
T1000 unit. 
 
Can you post a level 6 trace showing the condition the T1000 sends an OLC
with sessionID = 0
 
Simon

  _____  

From: h323plus-bounces at lists.packetizer.com
[mailto:h323plus-bounces at lists.packetizer.com] On Behalf Of Igor Pavlov
Sent: Monday, 28 December 2009 8:25 PM
To: h323plus at lists.packetizer.com
Subject: [h323plus] Valid sessionID in OpenLogicalChannel command


Hi.

I have problem when I reject OpenLogicalChannel (audio) while communicating
with Tandberg T1000.
In most cases Tandberg send me OpenLogicalChannel again with sessionID=0 so
my application falls in assertion
in file rtp.cxx line 760 :
PAssert(id > 0 && id < 256, PInvalidParameter);

I could not find valid value range for sessionID, but I don't like when
application crashes in this case :(
What can I do in this situation?


Igor Pavlov





-- 
Игорь Павлов





-- 
Игорь Павлов

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