tell rtp stack about what remote payload type to expect when the receiving end follows the stupid SHOULD as WONT and sends a different dynamic payload number than the one in the offer

src/include/switch_rtp.h

@@ -437,6 +437,8 @@ SWITCH_DECLARE(void) switch_rtp_set_private(switch_rtp_t *rtp_session, void *pri
 */
 SWITCH_DECLARE(void) switch_rtp_set_telephony_event(switch_rtp_t *rtp_session, switch_payload_t te);
 SWITCH_DECLARE(void) switch_rtp_set_telephony_recv_event(switch_rtp_t *rtp_session, switch_payload_t te);
+SWITCH_DECLARE(void) switch_rtp_set_recv_pt(switch_rtp_t *rtp_session, switch_payload_t pt);
+
 /*! 
   \brief Set the payload type for comfort noise
   \param rtp_session the RTP session to modify

src/mod/endpoints/mod_sofia/mod_sofia.h

@@ -587,6 +587,8 @@ struct private_object {
 	sofia_private_t *sofia_private;
 	uint8_t flags[TFLAG_MAX];
 	switch_payload_t agreed_pt;
+	switch_payload_t audio_recv_pt;
+	switch_payload_t video_recv_pt;
 	switch_core_session_t *session;
 	switch_channel_t *channel;
 	switch_frame_t read_frame;

src/mod/endpoints/mod_sofia/sofia_glue.c

@@ -3234,6 +3234,11 @@ switch_status_t sofia_glue_activate_rtp(private_object_t *tech_pvt, switch_rtp_f
 			switch_rtp_set_telephony_recv_event(tech_pvt->rtp_session, tech_pvt->recv_te);
 		}
 
+		if (tech_pvt->audio_recv_pt != tech_pvt->agreed_pt) {
+			switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(tech_pvt->session), SWITCH_LOG_CRIT, "Set audio receive payload to %u\n", tech_pvt->audio_recv_pt);
+			switch_rtp_set_recv_pt(tech_pvt->rtp_session, tech_pvt->audio_recv_pt);
+		}
+
 		if (sofia_test_pflag(tech_pvt->profile, PFLAG_SUPPRESS_CNG) ||
 			((val = switch_channel_get_variable(tech_pvt->channel, "supress_cng")) && switch_true(val)) ||
 			((val = switch_channel_get_variable(tech_pvt->channel, "suppress_cng")) && switch_true(val))) {
@@ -3412,6 +3417,13 @@ switch_status_t sofia_glue_activate_rtp(private_object_t *tech_pvt, switch_rtp_f
 					switch_rtp_set_ssrc(tech_pvt->video_rtp_session, ssrc_ul);
 				}
 
+
+				if (tech_pvt->video_recv_pt != tech_pvt->video_agreed_pt) {
+					switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(tech_pvt->session), SWITCH_LOG_DEBUG, 
+									  "Set video receive payload to %u\n", tech_pvt->video_recv_pt);
+					switch_rtp_set_recv_pt(tech_pvt->rtp_session, tech_pvt->video_recv_pt);
+				}
+
 				switch_channel_set_variable_printf(tech_pvt->channel, "sip_use_video_pt", "%d", tech_pvt->video_agreed_pt);
 				tech_pvt->video_ssrc = switch_rtp_get_ssrc(tech_pvt->rtp_session);
 				switch_channel_set_variable_printf(tech_pvt->channel, "rtp_use_video_ssrc", "%u", tech_pvt->ssrc);
@@ -4038,6 +4050,24 @@ switch_t38_options_t *sofia_glue_extract_t38_options(switch_core_session_t *sess
 
 }
 
+switch_status_t sofia_glue_get_offered_pt(private_object_t *tech_pvt, const switch_codec_implementation_t *mimp, switch_payload_t *pt)
+{
+	int i = 0;
+
+	for (i = 0; i < tech_pvt->num_codecs; i++) {
+		const switch_codec_implementation_t *imp = tech_pvt->codecs[i];
+
+		if (!strcasecmp(imp->iananame, mimp->iananame)) {
+			*pt = tech_pvt->ianacodes[i];
+
+			return SWITCH_STATUS_SUCCESS;
+		}
+	}
+
+	return SWITCH_STATUS_FALSE;
+}
+
+
 uint8_t sofia_glue_negotiate_sdp(switch_core_session_t *session, const char *r_sdp)
 {
 	uint8_t match = 0;
@@ -4554,6 +4584,14 @@ uint8_t sofia_glue_negotiate_sdp(switch_core_session_t *session, const char *r_s
 					switch_snprintf(tmp, sizeof(tmp), "%d", tech_pvt->remote_sdp_audio_port);
 					switch_channel_set_variable(tech_pvt->channel, SWITCH_REMOTE_MEDIA_IP_VARIABLE, tech_pvt->remote_sdp_audio_ip);
 					switch_channel_set_variable(tech_pvt->channel, SWITCH_REMOTE_MEDIA_PORT_VARIABLE, tmp);
+					tech_pvt->audio_recv_pt = map->rm_pt;
+					
+					if (switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
+						sofia_glue_get_offered_pt(tech_pvt, mimp, &tech_pvt->audio_recv_pt);
+					}
+					
+					switch_snprintf(tmp, sizeof(tmp), "%d", tech_pvt->audio_recv_pt);
+					switch_channel_set_variable(tech_pvt->channel, "sip_audio_recv_pt", tmp);
 					
 				}
 				
@@ -4665,6 +4703,16 @@ uint8_t sofia_glue_negotiate_sdp(switch_core_session_t *session, const char *r_s
 						switch_snprintf(tmp, sizeof(tmp), "%d", tech_pvt->video_agreed_pt);
 						switch_channel_set_variable(tech_pvt->channel, "sip_video_pt", tmp);
 						sofia_glue_check_video_codecs(tech_pvt);
+
+						tech_pvt->video_recv_pt = map->rm_pt;
+						
+						if (switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
+							sofia_glue_get_offered_pt(tech_pvt, mimp, &tech_pvt->video_recv_pt);
+						}
+
+						switch_snprintf(tmp, sizeof(tmp), "%d", tech_pvt->video_recv_pt);
+						switch_channel_set_variable(tech_pvt->channel, "sip_video_recv_pt", tmp);
+						
 						break;
 					} else {
 						vmatch = 0;
@@ -5219,6 +5267,19 @@ static int recover_callback(void *pArg, int argc, char **argv, char **columnName
 				switch_xml_free(xml);
 				return 0;
 			}
+			
+			if (switch_rtp_ready(tech_pvt->rtp_session)) {
+				if ((tmp = switch_channel_get_variable(channel, "sip_audio_recv_pt"))) {
+					switch_rtp_set_recv_pt(tech_pvt->rtp_session, atoi(tmp));
+				}
+			}
+
+			if (switch_rtp_ready(tech_pvt->video_rtp_session)) {
+				if ((tmp = switch_channel_get_variable(channel, "sip_video_recv_pt"))) {
+					switch_rtp_set_recv_pt(tech_pvt->rtp_session, atoi(tmp));
+				}
+			}
+
 		}
 
 		if (switch_channel_get_variable(channel, SWITCH_SIGNAL_BOND_VARIABLE)) {

src/switch_rtp.c

@@ -1578,7 +1578,7 @@ SWITCH_DECLARE(switch_status_t) switch_rtp_create(switch_rtp_t **new_rtp_session
 	rtp_session->recv_msg.header.cc = 0;
 
 	rtp_session->payload = payload;
-
+	rtp_session->rpayload = payload;
 
 	rtp_session->rtcp_send_msg.header.version = 2;
 	rtp_session->rtcp_send_msg.header.p = 0;
@@ -1773,6 +1773,12 @@ SWITCH_DECLARE(void) switch_rtp_set_telephony_recv_event(switch_rtp_t *rtp_sessi
 	}
 }
 
+SWITCH_DECLARE(void) switch_rtp_set_recv_pt(switch_rtp_t *rtp_session, switch_payload_t pt)
+{
+	rtp_session->rpayload = pt;
+}
+
+
 SWITCH_DECLARE(void) switch_rtp_set_cng_pt(switch_rtp_t *rtp_session, switch_payload_t pt)
 {
 	rtp_session->cng_pt = pt;
@@ -2813,7 +2819,7 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 			rtp_session->recv_msg.header.pt != 13 && 
 			rtp_session->recv_msg.header.pt != rtp_session->recv_te && 
 			(!rtp_session->cng_pt || rtp_session->recv_msg.header.pt != rtp_session->cng_pt) && 
-			rtp_session->recv_msg.header.pt != rtp_session->payload) {
+			rtp_session->recv_msg.header.pt != rtp_session->rpayload) {
 			/* drop frames of incorrect payload number and return CNG frame instead */
 			return_cng_frame();
 		}
@@ -3131,8 +3137,6 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 			rtp_session->recv_msg.header.pt = 97;
 		}
 
-		rtp_session->rpayload = (switch_payload_t) rtp_session->recv_msg.header.pt;
-
 		break;
 
 	do_continue: