Add bootstrap Down event when re-starting network discovery

When bootstrap is restarted bootstrap down event is sent
keep status if we have set bootstrap ready before sending the event

Author: Mika Tervonen

source/6LoWPAN/ws/ws_bootstrap.c

@@ -183,6 +183,21 @@ static int ws_bootstrap_tasklet_init(protocol_interface_info_entry_t *cur)
 
     return 0;
 }
+static void ws_nwk_event_post(protocol_interface_info_entry_t *cur, arm_nwk_interface_status_type_e posted_event)
+{
+    arm_event_s event = {
+        .receiver = cur->net_start_tasklet,
+        .sender = protocol_read_tasklet_id(), /**< Event sender Tasklet ID */
+        .event_type = ARM_LIB_NWK_INTERFACE_EVENT,
+        .event_data = posted_event,
+        .event_id = (int8_t) cur->id,
+        .data_ptr = NULL,
+        .priority = ARM_LIB_LOW_PRIORITY_EVENT,
+    };
+    if (eventOS_event_send(&event) != 0) {
+        tr_error("nwk_net_event_post(): event send failed");
+    }
+}
 
 static int8_t ws_bootsrap_event_trig(ws_bootsrap_event_type_e event_type, int8_t interface_id, arm_library_event_priority_e priority, void *event_data)
 {
@@ -1966,6 +1981,13 @@ static void ws_bootstrap_start_discovery(protocol_interface_info_entry_t *cur)
         trickle_inconsistent_heard(&cur->ws_info->trickle_pan_advertisement_solicit, &cur->ws_info->trickle_params_pan_discovery);
     }
 
+    if ((cur->lowpan_info & INTERFACE_NWK_BOOTSRAP_ACTIVE) != INTERFACE_NWK_BOOTSRAP_ACTIVE) {
+        // we have sent bootstrap ready event and now
+        // restarted discovery so bootstrap down event is sent
+        cur->lowpan_info |= INTERFACE_NWK_BOOTSRAP_ACTIVE;
+        ws_nwk_event_post(cur, ARM_NWK_NWK_CONNECTION_DOWN);
+    }
+
     // Discovery statemachine is checkked after two trickle interval
     cur->bootsrap_state_machine_cnt = 2 * cur->ws_info->trickle_params_pan_discovery.Imin + randLIB_get_8bit() % 50;
 }