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res_rtp_asterisk: Fix infinite DTMF issue when switching to P2P bridge

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If a bridge switched to P2P when a DTMF was in progress it
was possible for the DTMF to continue being sent indefinitely.

Change-Id: I7e2a3efe0d59d4b214ed50cd0b5d0317e2d92e29
This commit is contained in:
Torrey Searle
2016-09-29 19:52:45 +02:00
committed by Richard Mudgett
parent 3ab7fae96b
commit cc269766b8
1 changed files with 17 additions and 0 deletions
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17
res/res_rtp_asterisk.c
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@@ -4284,6 +4284,7 @@ static int bridge_p2p_rtp_write(struct ast_rtp_instance *instance, unsigned int
int reconstruct = ntohl(rtpheader[0]);
struct ast_sockaddr remote_address = { {0,} };
int ice;
unsigned int timestamp = ntohl(rtpheader[1]);
/* Get fields from packet */
payload = (reconstruct & 0x7f0000) >> 16;
@@ -4313,6 +4314,22 @@ static int bridge_p2p_rtp_write(struct ast_rtp_instance *instance, unsigned int
return -1;
}
/* If bridged peer is in dtmf, feed all packets to core until it finishes to avoid infinite dtmf */
if (bridged->sending_digit) {
ast_debug(1, "Feeding packets to core until DTMF finishes\n");
return -1;
}
/*
* Even if we are no longer in dtmf, we could still be receiving
* re-transmissions of the last dtmf end still. Feed those to the
* core so they can be filtered accordingly.
*/
if (rtp->last_end_timestamp == timestamp) {
ast_debug(1, "Feeding packet with duplicate timestamp to core\n");
return -1;
}
/* If the marker bit has been explicitly set turn it on */
if (ast_test_flag(rtp, FLAG_NEED_MARKER_BIT)) {
mark = 1;