Author: mjordan
Date: Wed Nov 12 18:23:20 2014
New Revision: 427771
URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=427771
Log:
main/rtp_engine: Fix crash when processing more than one RTCP report info block
Asterisk - in res_rtp_asterisk - only understands a single RTCP report info
block. When the RTCP information was refactored in the RTP Engine to be pushed
over the Stasis message bus, I put in the hooks into the engine to handle
multiple RTCP report info blocks, in the hope that a future RTP implementation
would be able to provide that data. Unfortunately, res_rtp_asterisk has a
tendency to "lie":
(1) It will send RTCP reports with a reception_report_count greater than 1
(which is pulled directly from the RTCP packet itself, so that part is
correct)
(2) It will only provide a single report block
When the rtp_engine goes to convert this to a JSON blob, hilarity ensues as it
looks for a report block that doesn't exist.
This patch updates the rtp_engine to be a bit more skeptical about what it is
presented with. While this could also be fixed in res_rtp_asterisk, this patch
prefers to fix it in the engine for two reasons:
(1) The engine is designed to work with multiple RTP implementation, and hence
having it be more robust is a good thing (tm)
(2) res_rtp_asterisk's handling of RTCP information is "fun". It should report
the correct reception_report_count; ideally it should also be giving us all
of the blocks - but it is *definitely* not designed to do that. Going down
that road is a non-trivial effort.
Review: https://reviewboard.asterisk.org/r/4158/
ASTERISK-24489 #close
Reported by: Gregory Malsack
Tested by: Gregory Malsack
ASTERISK-24498 #close
Reported by: Beppo Mazzucato
Tested by: Beppo Maazucato
........
Merged revisions 427762 from http://svn.asterisk.org/svn/asterisk/branches/12
........
Merged revisions 427763 from http://svn.asterisk.org/svn/asterisk/branches/13
Modified:
trunk/ (props changed)
trunk/main/rtp_engine.c
Propchange: trunk/
------------------------------------------------------------------------------
Binary property 'branch-13-merged' - no diff available.
Modified: trunk/main/rtp_engine.c
URL:
http://svnview.digium.com/svn/asterisk/trunk/main/rtp_engine.c?view=diff&rev=427771&r1=427770&r2=427771
==============================================================================
--- trunk/main/rtp_engine.c (original)
+++ trunk/main/rtp_engine.c Wed Nov 12 18:23:20 2014
@@ -1907,7 +1907,7 @@
return NULL;
}
- for (i = 0; i < payload->report->reception_report_count; i++) {
+ for (i = 0; i < payload->report->reception_report_count &&
payload->report->report_block[i]; i++) {
struct ast_json *json_report_block;
char str_lsr[32];
snprintf(str_lsr, sizeof(str_lsr), "%u",
payload->report->report_block[i]->lsr);
--
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