Updated SKINNY on-hook action to hang up all calls on a device, except those in…

Updated SKINNY on-hook action to hang up all calls on a device, except those in a short list of call states (or perform a blind transfer).
Added a hook after completing the hangup operation to start ringing if there is an inbound call active on the device.
Signed-off-by: Nathan Neulinger <nneul@neulinger.org>

src/mod/endpoints/mod_skinny/mod_skinny.c

@@ -303,6 +303,11 @@ char * skinny_profile_find_session_uuid(skinny_profile_t *profile, listener_t *l
 		call_id_condition = switch_mprintf("1=1");
 	}
 	switch_assert(call_id_condition);
+
+	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO,
+					"Attempting to find active call with criteria (%s and %s and %s)\n",
+					device_condition, line_instance_condition, call_id_condition);
+
 	if((sql = switch_mprintf(
 					"SELECT channel_uuid, line_instance "
 					"FROM skinny_active_lines "
@@ -917,6 +922,79 @@ switch_status_t channel_on_destroy(switch_core_session_t *session)
 	return SWITCH_STATUS_SUCCESS;
 }
 
+struct skinny_ring_active_calls_helper {
+	private_t *tech_pvt;
+	listener_t *listener;
+};
+
+int skinny_ring_active_calls_callback(void *pArg, int argc, char **argv, char **columnNames)
+{
+	struct skinny_ring_active_calls_helper *helper = pArg;
+	switch_core_session_t *session;
+
+	/* char *device_name = argv[0]; */
+	/* uint32_t device_instance = atoi(argv[1]); */
+	/* uint32_t position = atoi(argv[2]); */
+	uint32_t line_instance = atoi(argv[3]);
+	/* char *label = argv[4]; */
+	/* char *value = argv[5]; */
+	/* char *caller_name = argv[6]; */
+	uint32_t ring_on_idle = atoi(argv[7]);
+	/* uint32_t ring_on_active = atoi(argv[8]); */
+	/* uint32_t busy_trigger = atoi(argv[9]); */
+	/* char *forward_all = argv[10]; */
+	/* char *forward_busy = argv[11]; */
+	/* char *forward_noanswer = argv[12]; */
+	/* uint32_t noanswer_duration = atoi(argv[13]); */
+	/* char *channel_uuid = argv[14]; */
+	uint32_t call_id = atoi(argv[15]);
+	/* uint32_t call_state = atoi(argv[16]); */
+
+	session = skinny_profile_find_session(helper->listener->profile, helper->listener, &line_instance, call_id);
+
+	if(session) {
+		/* After going on-hook, start ringing if there is an active call in the SKINNY_RING_IN state */
+		skinny_log_l(helper->listener, SWITCH_LOG_DEBUG, "Start Ringer for active Call ID (%d), Line Instance (%d), Line State (%d).\n", call_id, line_instance, skinny_line_get_state(helper->listener,line_instance, call_id));
+
+		send_set_lamp(helper->listener, SKINNY_BUTTON_LINE, line_instance, SKINNY_LAMP_BLINK);
+
+		if ( ring_on_idle ) {
+			send_set_ringer(helper->listener, SKINNY_RING_INSIDE, SKINNY_RING_FOREVER, line_instance, call_id);
+		} else {
+			send_set_ringer(helper->listener, SKINNY_RING_FLASHONLY, SKINNY_RING_FOREVER, line_instance, call_id);
+		}
+
+		switch_core_session_rwunlock(session);
+	}
+
+	return 0;
+}
+
+switch_status_t skinny_ring_active_calls(listener_t *listener)
+/* Look for all SKINNY active calls in the SKINNY_RING_IN state and tell them to start ringing */
+{
+	struct skinny_ring_active_calls_helper helper = {0};
+	char *sql;
+
+	helper.listener = listener;
+
+	if ((sql = switch_mprintf(
+                    "SELECT skinny_lines.*, channel_uuid, call_id, call_state "
+                    "FROM skinny_active_lines "
+                    "INNER JOIN skinny_lines "
+                    "ON skinny_active_lines.device_name = skinny_lines.device_name "
+                    "AND skinny_active_lines.device_instance = skinny_lines.device_instance "
+                    "AND skinny_active_lines.line_instance = skinny_lines.line_instance "
+                    "WHERE skinny_lines.device_name='%s' AND skinny_lines.device_instance=%d "
+                    "AND (call_state=%d)",
+                    listener->device_name, listener->device_instance, SKINNY_RING_IN))) {
+		skinny_execute_sql_callback(listener->profile, listener->profile->sql_mutex, sql, skinny_ring_active_calls_callback, &helper);
+		switch_safe_free(sql);
+	}
+
+	return SWITCH_STATUS_SUCCESS;
+}
+
 struct channel_on_hangup_helper {
 	private_t *tech_pvt;
 	switch_call_cause_t cause;
@@ -1002,6 +1080,9 @@ int channel_on_hangup_callback(void *pArg, int argc, char **argv, char **columnN
 			send_set_speaker_mode(listener, SKINNY_SPEAKER_OFF);
 		}
 		send_set_ringer(listener, SKINNY_RING_OFF, SKINNY_RING_FOREVER, line_instance, call_id);
+
+        /* After hanging up this call, activate the ringer for any other active incoming calls */
+        skinny_ring_active_calls(listener);
 	}
 	return 0;
 }

src/mod/endpoints/mod_skinny/skinny_server.c

@@ -112,6 +112,8 @@ switch_status_t skinny_create_incoming_session(listener_t *listener, uint32_t *l
 
 	skinny_line_get(listener, *line_instance_p, &button);
 
+	skinny_log_l(listener, SWITCH_LOG_INFO, "Attempting to create incoming session on Line %d\n", *line_instance_p);
+
 	if (!button || !button->shortname[0]) {
 		skinny_log_l(listener, SWITCH_LOG_CRIT, "Line %d not found on device\n", *line_instance_p);
 		goto error;
@@ -1075,6 +1077,58 @@ switch_status_t skinny_hold_active_calls(listener_t *listener)
 	return SWITCH_STATUS_SUCCESS;
 }
 
+struct skinny_hangup_active_calls_helper {
+    listener_t *listener;
+};
+
+int skinny_hangup_active_calls_callback(void *pArg, int argc, char **argv, char **columnNames)
+{
+	struct skinny_hangup_active_calls_helper *helper = pArg;
+	switch_core_session_t *session;
+
+	/* char *device_name = argv[0]; */
+	/* uint32_t device_instance = atoi(argv[1]); */
+	/* uint32_t position = atoi(argv[2]); */
+	uint32_t line_instance = atoi(argv[3]);
+	/* char *label = argv[4]; */
+	/* char *value = argv[5]; */
+	/* char *caller_name = argv[6]; */
+	/* uint32_t ring_on_idle = atoi(argv[7]); */
+	/* uint32_t ring_on_active = atoi(argv[8]); */
+	/* uint32_t busy_trigger = atoi(argv[9]); */
+	/* char *forward_all = argv[10]; */
+	/* char *forward_busy = argv[11]; */
+	/* char *forward_noanswer = argv[12]; */
+	/* uint32_t noanswer_duration = atoi(argv[13]); */
+	/* char *channel_uuid = argv[14]; */
+	uint32_t call_id = atoi(argv[15]);
+	uint32_t call_state = atoi(argv[16]);
+
+	session = skinny_profile_find_session(helper->listener->profile, helper->listener, &line_instance, call_id);
+
+	if(session) {
+		switch_channel_t *channel = NULL;
+		private_t *tech_pvt = NULL;
+
+		channel = switch_core_session_get_channel(session);
+		tech_pvt = switch_core_session_get_private(session);
+
+		if (tech_pvt->transfer_from_call_id) { /* Perform a blind transfer, instead of hanging up */
+			skinny_session_transfer(session, helper->listener, line_instance);
+		} else {
+			/* Hangup on an active call that is not in one of the states listed */
+			if ((call_state != SKINNY_ON_HOOK)&&(call_state != SKINNY_HOLD)&&(call_state != SKINNY_CALL_WAITING)&&(call_state != SKINNY_CALL_PARK)&&(call_state != SKINNY_IN_USE_REMOTELY)&&(call_state != SKINNY_RING_IN)) {
+				skinny_log_l(helper->listener, SWITCH_LOG_DEBUG, "Hangup Line Instance (%d), Call ID (%d), Line State (%d)\n", line_instance, tech_pvt->call_id, skinny_line_get_state(helper->listener,line_instance, call_id));
+				switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
+			}
+		}
+
+		switch_core_session_rwunlock(session);
+	}
+
+	return 0;
+}
+
 /*****************************************************************************/
 /* SKINNY MESSAGE HANDLERS */
 /*****************************************************************************/
@@ -1559,6 +1613,7 @@ switch_status_t skinny_handle_off_hook_message(listener_t *listener, skinny_mess
 		}
 		call_id = request->data.off_hook.call_id;
 	}
+	skinny_log_l(listener, SWITCH_LOG_INFO, "Attempting to handle off hook message for call_id %d and line_instance %d.\n", call_id, line_instance);
 
 	session = skinny_profile_find_session(listener->profile, listener, &line_instance, call_id);
 
@@ -1567,6 +1622,7 @@ switch_status_t skinny_handle_off_hook_message(listener_t *listener, skinny_mess
 	if(session && line_state == SKINNY_RING_IN ) { /*answering a call */
 		skinny_session_answer(session, listener, line_instance);
 	} else { /* start a new call */
+
 		skinny_create_incoming_session(listener, &line_instance, &session);
 		if ( ! session ) {
 			skinny_log_l_msg(listener, SWITCH_LOG_CRIT, "Unable to handle off hook message, could not create session.\n");
@@ -1590,37 +1646,36 @@ switch_status_t skinny_handle_on_hook_message(listener_t *listener, skinny_messa
 	switch_status_t status = SWITCH_STATUS_SUCCESS;
 	uint32_t line_instance = 0;
 	uint32_t call_id = 0;
-	switch_core_session_t *session = NULL;
+	struct skinny_hangup_active_calls_helper helper = {0};
+	char *sql;
 
 	if(skinny_check_data_length_soft(request, sizeof(request->data.on_hook))) {
 		line_instance = request->data.on_hook.line_instance;
 		call_id = request->data.on_hook.call_id;
 	}
+	skinny_log_l(listener, SWITCH_LOG_INFO, "Attempting to handle on hook message for Call ID (%d), Line Instance (%d).\n", call_id, line_instance);
 
-	session = skinny_profile_find_session(listener->profile, listener, &line_instance, call_id);
-
-	if(session) {
-		switch_channel_t *channel = NULL;
-		private_t *tech_pvt = NULL;
+	/* Walk through all active calls for this device. The callback should hangup any active calls that should be terminated when the device goes on-hook */
 
-		channel = switch_core_session_get_channel(session);
-		tech_pvt = switch_core_session_get_private(session);
-
-		if (tech_pvt->transfer_from_call_id) { /* blind transfer */
-			status = skinny_session_transfer(session, listener, line_instance);
-		} else {
-			if (skinny_line_get_state(listener, line_instance, call_id) != SKINNY_IN_USE_REMOTELY) {
-				switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
-			}
-		}
-	}
+	helper.listener = listener;
 
-	if(session) {
-		switch_core_session_rwunlock(session);
+	if ((sql = switch_mprintf(
+		"SELECT skinny_lines.*, channel_uuid, call_id, call_state "
+		"FROM skinny_active_lines "
+		"INNER JOIN skinny_lines "
+		"ON skinny_active_lines.device_name = skinny_lines.device_name "
+		"AND skinny_active_lines.device_instance = skinny_lines.device_instance "
+		"AND skinny_active_lines.line_instance = skinny_lines.line_instance "
+		"WHERE skinny_lines.device_name='%s' AND skinny_lines.device_instance=%d",
+		listener->device_name, listener->device_instance))) 
+	{
+		skinny_execute_sql_callback(listener->profile, listener->profile->sql_mutex, sql, skinny_hangup_active_calls_callback, &helper);
+		switch_safe_free(sql);
 	}
 
 	return status;
 }
+
 switch_status_t skinny_handle_forward_stat_req_message(listener_t *listener, skinny_message_t *request)
 {
 	skinny_message_t *message;