add RTP_BUG_IGNORE_MARK_BIT to list of bug tolerances

src/include/switch_types.h

@@ -554,7 +554,7 @@ typedef enum {
 	 */
 
 
-	RTP_BUG_SONUS_SEND_INVALID_TIMESTAMP_2833 = (1 << 1)
+	RTP_BUG_SONUS_SEND_INVALID_TIMESTAMP_2833 = (1 << 1),
 		/*
 		   Sonus wrongly expects that, when sending a multi-packet 2833 DTMF event, The sender
 		   should increment the RTP timestamp in each packet when, in reality, the sender should
@@ -573,6 +573,19 @@ typedef enum {
 
 		   This flag will cause each packet to have a new timestamp.
 		 */
+
+
+	RTP_BUG_IGNORE_MARK_BIT = (1 << 2)
+
+	/*
+	  A Huawei SBC has been discovered that sends the mark bit on every single RTP packet.
+	  Since this causes the RTP stack to flush it's buffers, it horribly messes up the timing on the channel.
+
+	  This flag will do nothing when an inbound packet contains the mark bit.
+
+	 */
+
+
 } switch_rtp_bug_flag_t;
 
 #ifdef _MSC_VER

src/mod/endpoints/mod_sofia/sofia.c

@@ -2125,6 +2125,13 @@ static void parse_rtp_bugs(sofia_profile_t *profile, const char *str)
 		profile->auto_rtp_bugs &= ~RTP_BUG_SONUS_SEND_INVALID_TIMESTAMP_2833;
 	}
 
+	if (switch_stristr("RTP_BUG_IGNORE_MARK_BIT", str)) {
+		profile->auto_rtp_bugs |= RTP_BUG_IGNORE_MARK_BIT;
+	}	
+
+	if (switch_stristr("~RTP_BUG_IGNORE_MARK_BIT", str)) {
+		profile->auto_rtp_bugs &= ~RTP_BUG_IGNORE_MARK_BIT;
+	}	
 
 }
 

src/switch_rtp.c

@@ -2043,7 +2043,7 @@ static switch_status_t read_rtp_packet(switch_rtp_t *rtp_session, switch_size_t
 
 	if (rtp_session->jb && rtp_session->recv_msg.header.version == 2 && *bytes) {
 		if (rtp_session->recv_msg.header.m && rtp_session->recv_msg.header.pt != rtp_session->recv_te && 
-			!switch_test_flag(rtp_session, SWITCH_RTP_FLAG_VIDEO)) {
+			!switch_test_flag(rtp_session, SWITCH_RTP_FLAG_VIDEO) && !(rtp_session->rtp_bugs & RTP_BUG_IGNORE_MARK_BIT)) {
 			stfu_n_reset(rtp_session->jb);
 		}
 
@@ -2395,7 +2395,7 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 		}
 
 		if (bytes && rtp_session->recv_msg.header.m && rtp_session->recv_msg.header.pt != rtp_session->recv_te && 
-			!switch_test_flag(rtp_session, SWITCH_RTP_FLAG_VIDEO)) {
+			!switch_test_flag(rtp_session, SWITCH_RTP_FLAG_VIDEO) && !(rtp_session->rtp_bugs & RTP_BUG_IGNORE_MARK_BIT)) {
 			rtp_flush_read_buffer(rtp_session, SWITCH_RTP_FLUSH_ONCE);
 		}