[add] the function of set [internet up] status, activate the callback.

components/net/netdev/include/netdev.h

@@ -186,6 +186,7 @@ void netdev_low_level_set_gw(struct netdev *netdev, const ip_addr_t *gw);
 void netdev_low_level_set_dns_server(struct netdev *netdev, uint8_t dns_num, const ip_addr_t *dns_server);
 void netdev_low_level_set_status(struct netdev *netdev, rt_bool_t is_up);
 void netdev_low_level_set_link_status(struct netdev *netdev, rt_bool_t is_up);
+void netdev_low_level_set_internet_status(struct netdev *netdev, rt_bool_t is_up);
 void netdev_low_level_set_dhcp_status(struct netdev *netdev, rt_bool_t is_enable);
 
 #ifdef __cplusplus

components/net/netdev/src/netdev.c

@@ -828,6 +828,34 @@ void netdev_low_level_set_link_status(struct netdev *netdev, rt_bool_t is_up)
     }
 }
 
+/**
+ * This function will set network interface device active internet status.
+ * @NOTE it can only be called in the network interface device driver.
+ *
+ * @param netdev the network interface device to change
+ * @param is_up the new internet status
+ */
+void netdev_low_level_set_internet_status(struct netdev *netdev, rt_bool_t is_up)
+{
+    if (netdev && netdev_is_internet_up(netdev) != is_up)
+    {
+        if (is_up)
+        {
+            netdev->flags |= NETDEV_FLAG_INTERNET_UP;
+        }
+        else
+        {
+            netdev->flags &= ~NETDEV_FLAG_INTERNET_UP;
+        }
+
+        /* execute  network interface device status change callback function */
+        if (netdev->status_callback)
+        {
+            netdev->status_callback(netdev, is_up ? NETDEV_CB_STATUS_INTERNET_UP : NETDEV_CB_STATUS_INTERNET_DOWN);
+        }
+    }
+}
+
 /**
  * This function will set network interface device DHCP status.
  * @NOTE it can only be called in the network interface device driver.

components/net/sal_socket/src/sal_socket.c

@@ -261,12 +261,12 @@ __exit:
     if (result > 0)
     {
         LOG_D("Set network interface device(%s) internet status up.", netdev->name);
-        netdev->flags |= NETDEV_FLAG_INTERNET_UP;
+        netdev_low_level_set_internet_status(netdev, RT_TRUE);
     }
     else
     {
         LOG_D("Set network interface device(%s) internet status down.", netdev->name);
-        netdev->flags &= ~NETDEV_FLAG_INTERNET_UP;
+        netdev_low_level_set_internet_status(netdev, RT_FALSE);
     }
 
     if (sockfd >= 0)