lwip: Add client's MAC addr to dhcp server cb

* Extended storage for staipassigned events to pass client's MAC address.
* Added client's MAC to dhcp server callback
* Posting the staipassigned events with clients IP and MAC address

components/lwip/apps/dhcpserver/dhcpserver.c

@@ -1,16 +1,8 @@
-// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/*
+ * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 //#include "esp_common.h"
 #include <stdlib.h>
 #include <string.h>
@@ -690,7 +682,7 @@ static void send_ack(struct dhcps_msg *m, u16_t len)
 #endif
 
     if (SendAck_err_t == ERR_OK) {
-        dhcps_cb(m->yiaddr);
+        dhcps_cb(m->yiaddr, m->chaddr);
     }
 
     if (p->ref != 0) {