Re: [Openh323gk-users] gnugk 2.03 and TAPI, NM and CISCO

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



[Tjapko wrote]
Jan, Chih Wei? Can somebody help me putting back the functionality in
version 2.03 as described in document
http://www.openh323.org/pipermail/openh323/1999-July/000963.html  says that
the ASN parser encodes 8x 01 00.  Maybe it did then, but it does not now.
It encodes it as 8x 00.  (x is the choice number).  So something seems to be
changed.  But this has been though about before. The ASN parser should
encode 8x 01 00 but trace analysis (etherreal I have the trace available)
shows only the first 2 bytes are encoded with the last version of gnugk
2.03. ( Like 8x 00) 81 means the second after extension marker 01 means
length of element 00 means that there is no information thus no next octet.
00 actual element content

This mismatch causes problems when using TAPi or NM dialers when your
terminating endpoint is using Cisco routers. For example the as5350. In your
trace you see a function not supported or a drq after a normal connection
that gets immediately disconnected (and CDR generated) because of the
absence of the mentioned field. When you use terminating endpoints that does
not deal with the facility message you will not run into any problems. It
seems a bug in the X691 PER packet encoding rules for the TAPI dialler. I
don't think that gnugk is wrong here but restoring the function as described
in above docuyment will probably fix this problem when dealing with TAPI, NM
and terminating Cisco's.

I also would like to refer to a unanswered mail from Franz  at
http://sourceforge.net/mailarchive/forum.php?thread_id=1791553&forum_id=3079
that is describing exact the same error and shows the problem in the
displayed trace. I don't see an answer here so I suggest that this issue is
still open!

[Franz]
I'm currently in Hong Kong and expect to be back in the UK by Wednesday. I
have annother patch (not related to this problem) to be published at the
developers forum for discussion amongst the developers. At the same time
I'll try to address above issue again.

Regards,
Franz.


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.488 / Virus Database: 287 - Release Date: 05/06/2003



-------------------------------------------------------
This SF.net email is sponsored by:  Etnus, makers of TotalView, The best
thread debugger on the planet. Designed with thread debugging features
you've never dreamed of, try TotalView 6 free at www.etnus.com.
_______________________________________________
List: Openh323gk-users@lists.sourceforge.net
Archive: http://sourceforge.net/mailarchive/forum.php?forum_id=8549
Homepage: http://www.gnugk.org/



-------------------------------------------------------
This SF.net email is sponsored by:  Etnus, makers of TotalView, The best
thread debugger on the planet. Designed with thread debugging features
you've never dreamed of, try TotalView 6 free at www.etnus.com.
_______________________________________________
List: Openh323gk-users@lists.sourceforge.net
Archive: http://sourceforge.net/mailarchive/forum.php?forum_id=8549
Homepage: http://www.gnugk.org/

[Index of Archives]     [SIP]     [Open H.323]     [Gnu Gatekeeper]     [Asterisk PBX]     [ISDN Cause Codes]     [Yosemite News]

  Powered by Linux