2952e95715
There are two scenarios that are exposed by DISCONNECT not initializing the progress indicator value before processing the message when the chan_dahdi.conf inbanddisconnect=yes option is set. 1) If a DISCONNECT comes in without a Progress Indicator ie and an earlier message (such as SETUP-ACKNOWLEDGE or PROCEEDING) came in with the indicator #8 (Inband audio present) then the DISCONNECT would not cause an immediate hangup. We would be letting the user hear the inband audio even though there isn't any. 2) If a DISCONNECT message comes in with the indicator #8 (Inband audio present) and then later the DISCONNECT message is repeated without a Progress Indicator ie we would still ignore the second DISCONNECT to let the user hear inband audio even though it likely isn't there anymore. PRI-180 #close Reported by: Alexandr Dranchuk Change-Id: Ic88aafb45053146b5701d666e6212f7555573624
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.