FS-7344: Fix race condition for INVITE right after ACK in 3PCC mode.

src/include/switch_ivr.h

@@ -122,6 +122,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_parse_all_events(switch_core_session_
 SWITCH_DECLARE(switch_status_t) switch_ivr_parse_next_event(switch_core_session_t *session);
 SWITCH_DECLARE(switch_status_t) switch_ivr_parse_all_messages(switch_core_session_t *session);
 SWITCH_DECLARE(switch_status_t) switch_ivr_parse_all_signal_data(switch_core_session_t *session);
+SWITCH_DECLARE(switch_status_t) switch_ivr_parse_next_signal_data(switch_core_session_t *session);
 SWITCH_DECLARE(switch_status_t) switch_ivr_process_indications(switch_core_session_t *session, switch_core_session_message_t *message);
 
 /*!

src/switch_channel.c

@@ -2100,10 +2100,8 @@ SWITCH_DECLARE(int) switch_channel_state_change_pending(switch_channel_t *channe
 
 SWITCH_DECLARE(int) switch_channel_check_signal(switch_channel_t *channel, switch_bool_t in_thread_only)
 {
-	if (!in_thread_only || switch_core_session_in_thread(channel->session)) {
-		switch_ivr_parse_all_signal_data(channel->session);
-	}
-
+	(void)in_thread_only;
+	switch_ivr_parse_next_signal_data(channel->session);
 	return 0;
 }
 

src/switch_ivr.c

@@ -820,7 +820,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_parse_all_messages(switch_core_sessio
 }
 
 
-SWITCH_DECLARE(switch_status_t) switch_ivr_parse_all_signal_data(switch_core_session_t *session)
+static switch_status_t switch_ivr_parse_signal_data(switch_core_session_t *session, switch_bool_t all)
 {
 	void *data;
 	switch_core_session_message_t msg = { 0 };
@@ -847,7 +847,8 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_parse_all_signal_data(switch_core_ses
 		switch_core_session_receive_message(session, &msg);
 
 		data = NULL;
-
+		if (!all)
+			break;
 	}
 
 	switch_channel_clear_flag(channel, CF_SIGNAL_DATA);
@@ -855,6 +856,14 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_parse_all_signal_data(switch_core_ses
 	return i ? SWITCH_STATUS_SUCCESS : SWITCH_STATUS_FALSE;
 }
 
+SWITCH_DECLARE(switch_status_t) switch_ivr_parse_all_signal_data(switch_core_session_t *session) {
+	return switch_ivr_parse_signal_data(session, SWITCH_TRUE);
+}
+
+SWITCH_DECLARE(switch_status_t) switch_ivr_parse_next_signal_data(switch_core_session_t *session) {
+	return switch_ivr_parse_signal_data(session, SWITCH_FALSE);
+}
+
 SWITCH_DECLARE(switch_status_t) switch_ivr_parse_all_events(switch_core_session_t *session)
 {
 	int x = 0;