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Libpri was lax in checking if a missing channel identification ie is mandatory for the SETUP ACKNOWLEDGE, PROCEEDING, ALERTING, and CONNECT messages. That ie is mandatory when those messages are the first response to a SETUP message sent by the CPE side. * Made those messages check if a missing channel identification ie is mandatory and send a STATUS with cause 96 "Mandatory information element is missing" in response. Libpri did not care if a mandatory ie had a coding error. * Made coding errors in mandatory ie's send a STATUS with cause 100 "Invalid information element contents" in response. * Fixed detection of coding errors in channel identification ie. SWP-8721 SWP-8722 git-svn-id: https://origsvn.digium.com/svn/libpri/branches/1.4@2337 2fbb986a-6c06-0410-b554-c9c1f0a7f128
libpri: An implementation of Primary Rate ISDN Written by Mark Spencer <markster@digium.com> What is libpri? =============== libpri is a C implementation of the Primary Rate ISDN specification. It was based on the Bellcore specification SR-NWT-002343 for National ISDN. As of May 12, 2001, it has been tested work with NI-2, Nortel DMS-100, and Lucent 5E Custom protocols on switches from Nortel and Lucent. What is the license for libpri? =============================== libpri is distributed under the terms of the GNU General Public License, which permit its use and linking with other GPL'd software only. The GNU GPL is included in the file LICENSE in this directory. As a special exception, libpri may also be linked to the OpenH323 library, so long as the entirity of the derivative work (as defined within the GPL) is licensed either under the MPL of the OpenH323 license or the GPL of libpri. If you wish to use libpri in an application for which the GPL is not appropriate (e.g. a proprietary embedded system), licenses for libpri under more flexible terms can be readily obtained through Digium, Inc. at reasonable cost. How do I report bugs or contribute? =================================== For now, contact the author directly. In the future if there is sufficient interest, we will setup a mailing list. Does anything use this library so far? ====================================== Yes, the Asterisk Open Source PBX does. http://www.asterisk.org Also, the Zapata library has hooks for it. http://www.zapatatelephony.org Special thanks ============== Special thanks to Jim Dixon <jim@lambdatel.com> for his help in testing and fixing the implementation.