DHCPv6 renew and transaction id update

Clear transaction ID when response callback is coming

Renew process not start a new if there is pending request ongoing.

wi-sun dhcpv6 callback will remove address if address get fail.

Change-Id: Ida790be12e95a8ef389d3e6a615d608af74c1b4a

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_bootstrap.c

@@ -1944,6 +1944,9 @@ static void ws_dhcp_client_global_adress_cb(int8_t interface, uint8_t dhcp_addr[
         if (cur) {
             rpl_control_register_address(cur, prefix);
         }
+    } else {
+        //Delete dhcpv6 client
+        dhcp_client_global_address_delete(interface, dhcp_addr, prefix);
     }
 }
 

source/DHCPv6_client/dhcpv6_client_service.c

@@ -153,6 +153,9 @@ int dhcp_solicit_resp_cb(uint16_t instance_id, void *ptr, uint8_t msg_name,  uin
         goto error_exit;
     }
 
+    //Clear Active Transaction state
+    srv_data_ptr->transActionId = 0;
+
     // Validate message
     if (msg_name != DHCPV6_REPLY_TYPE) {
         tr_error("invalid response");
@@ -332,7 +335,7 @@ int dhcp_client_server_address_update(int8_t interface, uint8_t *prefix, uint8_t
     }
 
     memcpy(srv_data_ptr->server_address, server_address, 16);
-    if (!srv_data_ptr->iaNonTemporalStructValid) {
+    if (srv_data_ptr->transActionId) {
         dhcp_service_update_server_address(srv_data_ptr->transActionId, server_address);
     }
     return 0;
@@ -396,6 +399,12 @@ void dhcpv6_renew(protocol_interface_info_entry_t *interface, if_address_entry_t
         return;
     }
 
+    if (srv_data_ptr->transActionId) {
+        //Do not trig new Renew process
+        tr_warn("Do not trig new pending renew request");
+        return;
+    }
+
     payload_len = libdhcpv6_address_request_message_len(srv_data_ptr->clientLinkIdType, srv_data_ptr->serverLinkType, 0, !dhcp_client.no_address_hint);
     payload_ptr = ns_dyn_mem_temporary_alloc(payload_len);
     if (payload_ptr == NULL) {