[Asterisk-code-review] res rtp asterisk: Fix infinite DTMF issue when switching to ... (asterisk[master])

[Joshua Colp]

Joshua Colp has uploaded a new change for review.

  https://gerrit.asterisk.org/4053

Change subject: res_rtp_asterisk: Fix infinite DTMF issue when switching to P2P bridge
......................................................................

res_rtp_asterisk: Fix infinite DTMF issue when switching to P2P bridge

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
---
M res/res_rtp_asterisk.c
1 file changed, 18 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/53/4053/1

diff --git a/res/res_rtp_asterisk.c b/res/res_rtp_asterisk.c
index d6eea3c..1e7df4b 100644
--- a/res/res_rtp_asterisk.c
+++ b/res/res_rtp_asterisk.c
@@ -4284,6 +4284,8 @@
 	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 +4315,22 @@
 		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;

-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I7e2a3efe0d59d4b214ed50cd0b5d0317e2d92e29
Gerrit-PatchSet: 1
Gerrit-Project: asterisk
Gerrit-Branch: master
Gerrit-Owner: Joshua Colp <jcolp at digium.com>
Gerrit-Reviewer: Torrey Searle <tsearle at gmail.com>