Wi-sun BBR, bootsrap and RPL Prefix calback update

RPL Prefix callback update indicate Prefix invalidation when Parent
address parameter is NULL.

Wi-SUN BBR not delete seprate own client RPL prefix invalidation handle
this automatically.

Wi-SUN bootsrap support new RPL Prefix invalidation for DHCPv6 client
for deprecate address and clean client.

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_bbr_api.c

@@ -302,9 +302,6 @@ static void ws_bbr_dhcp_server_stop(protocol_interface_info_entry_t *cur, uint8_
     tr_debug("DHCP server deactivate %s", trace_ipv6(global_id));
     DHCPv6_server_service_delete(cur->id, global_id, false);
 
-    // Set old addresses to deferred and timeout
-    ws_dhcp_client_address_delete(cur, global_id);
-
 }
 
 static void ws_bbr_rpl_status_check(protocol_interface_info_entry_t *cur)
@@ -342,9 +339,9 @@ static void ws_bbr_rpl_status_check(protocol_interface_info_entry_t *cur)
             tr_info("RPL GUA deactivate %s", trace_ipv6(global_dodag_id));
 
             // Old backbone information is deleted after 120 seconds
-            rpl_control_update_dodag_route(protocol_6lowpan_rpl_root_dodag, NULL, 0, 0, 120, true);
+            rpl_control_update_dodag_route(protocol_6lowpan_rpl_root_dodag, NULL, 0, 0, 0, true);
             rpl_control_update_dodag_prefix(protocol_6lowpan_rpl_root_dodag, global_dodag_id, 64, 0, 0, 0, true);
-            rpl_control_update_dodag_route(protocol_6lowpan_rpl_root_dodag, global_dodag_id, 64, 0, 120, true);
+            rpl_control_update_dodag_route(protocol_6lowpan_rpl_root_dodag, global_dodag_id, 64, 0, 0, true);
             ipv6_route_add_with_info(global_dodag_id, 64, backbone_interface_id, NULL, ROUTE_THREAD_BBR, NULL, 0, 120, 0);
 
             ws_bbr_dhcp_server_stop(cur, global_dodag_id);

source/6LoWPAN/ws/ws_bootstrap.c

@@ -1813,31 +1813,11 @@ static void ws_dhcp_client_global_adress_cb(int8_t interface, uint8_t dhcp_addr[
     tr_debug("DHCPv6 %s status %u", trace_ipv6(dhcp_addr), register_status);
 }
 
-static bool ws_address_entry_available(uint8_t *prefixPtr, if_address_list_t *list)
-{
-    bool addressReady = false;
-    ns_list_foreach(if_address_entry_t, entry, list) {
-        if (prefixPtr) {
-            if (memcmp(entry->address, prefixPtr, 8) == 0) {
-                addressReady = true;
-                break;
-            }
-        } else {
-            if (entry->source == ADDR_SOURCE_DHCP) {
-                addressReady = true;
-                break;
-            }
-        }
-    }
-    return addressReady;
-}
 
 void ws_dhcp_client_address_request(protocol_interface_info_entry_t *cur, uint8_t *prefix, uint8_t *parent_link_local)
 {
-    if (!ws_address_entry_available(prefix, &cur->ip_addresses)) {
-        if (dhcp_client_get_global_address(cur->id, parent_link_local, prefix, cur->mac, DHCPV6_DUID_HARDWARE_IEEE_802_NETWORKS_TYPE, ws_dhcp_client_global_adress_cb) != 0) {
-            tr_error("DHCPp client request fail");
-        }
+    if (dhcp_client_get_global_address(cur->id, parent_link_local, prefix, cur->mac, DHCPV6_DUID_HARDWARE_IEEE_802_NETWORKS_TYPE, ws_dhcp_client_global_adress_cb) != 0) {
+        tr_error("DHCPp client request fail");
     }
 }
 
@@ -1876,7 +1856,13 @@ static void ws_rpl_prefix_callback(prefix_entry_t *prefix, void *handle, uint8_t
         }
     } else if (prefix->prefix_len) {
         // Create new address using DHCP
-        ws_dhcp_client_address_request(cur, prefix->prefix, parent_link_local);
+        if (parent_link_local) {
+            ws_dhcp_client_address_request(cur, prefix->prefix, parent_link_local);
+        } else {
+            /* Deprecate address and remove client */
+            tr_debug("Prefix invalidation %s", trace_ipv6(prefix->prefix));
+            dhcp_client_global_address_delete(cur->id, NULL, prefix->prefix);
+        }
     }
 }
 

source/RPL/rpl_upward.c

@@ -993,6 +993,12 @@ prefix_entry_t *rpl_dodag_update_dio_prefix(rpl_dodag_t *dodag, const uint8_t *p
 
 void rpl_dodag_delete_dio_prefix(rpl_dodag_t *dodag, prefix_entry_t *prefix)
 {
+    rpl_instance_t *instance = dodag->instance;
+
+    if (instance && instance->domain->prefix_cb) {
+        instance->domain->prefix_cb(prefix, instance->domain->cb_handle, NULL);
+    }
+
     ns_list_remove(&dodag->prefixes, prefix);
     ns_dyn_mem_free(prefix);
 }