Add capability to have light static DHCP lease

Author: SmartBlug

tools/sdk/include/user_interface.h

@@ -385,6 +385,7 @@ bool wifi_softap_get_dhcps_lease(struct dhcps_lease *please);
 uint32 wifi_softap_get_dhcps_lease_time(void);
 bool wifi_softap_set_dhcps_lease_time(uint32 minute);
 bool wifi_softap_reset_dhcps_lease_time(void);
+bool wifi_softap_add_dhcps_lease(uint8 *macaddr);
 
 enum dhcp_status wifi_softap_dhcps_status(void);
 bool wifi_softap_set_dhcps_offer_option(uint8 level, void* optarg);

tools/sdk/lwip/src/app/dhcpserver.c

@@ -104,6 +104,54 @@ void ICACHE_FLASH_ATTR node_remove_from_list(list_node **phead, list_node* pdele
         }
     }
 }
+
+/******************************************************************************
+ * FunctionName : wifi_softap_add_dhcps_lease
+ * Description  : add static lease on the list, this will be the next available @
+ * Parameters   : mac address
+ * Returns      : true if ok and false if this mac already exist or if all ip are already reserved
+*******************************************************************************/
+bool ICACHE_FLASH_ATTR wifi_softap_add_dhcps_lease(uint8 *macaddr)
+{
+
+	struct dhcps_pool *pdhcps_pool = NULL;
+	list_node *pback_node = NULL;
+
+	uint32 start_ip = dhcps_lease.start_ip.addr;
+	uint32 end_ip = dhcps_lease.end_ip.addr;
+
+	for (pback_node = plist; pback_node != NULL;pback_node = pback_node->pnext) {
+	pdhcps_pool = pback_node->pnode;
+	if (os_memcmp(pdhcps_pool->mac, macaddr, sizeof(pdhcps_pool->mac)) == 0){
+#if DHCPS_DEBUG
+		os_printf("this mac already exist");
+#endif
+		return false;
+	}
+	else start_ip = htonl((ntohl(start_ip) + 1));
+	}
+
+	if (start_ip>end_ip) {
+#if DHCPS_DEBUG
+		os_printf("no more ip available");
+#endif
+		return false;
+	}
+
+	pdhcps_pool = (struct dhcps_pool *)os_zalloc(sizeof(struct dhcps_pool));
+	pdhcps_pool->ip.addr = start_ip;
+	os_memcpy(pdhcps_pool->mac, macaddr, sizeof(pdhcps_pool->mac));
+	pdhcps_pool->lease_timer = DHCPS_LEASE_TIMER;
+	pdhcps_pool->type = DHCPS_TYPE_STATIC;
+	pdhcps_pool->state = DHCPS_STATE_ONLINE;
+	pback_node = (list_node *)os_zalloc(sizeof(list_node ));
+	pback_node->pnode = pdhcps_pool;
+	pback_node->pnext = NULL;
+	node_insert_to_list(&plist,pback_node);
+
+	return true;
+}
+
 ///////////////////////////////////////////////////////////////////////////////////
 /*
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