Method for acquiring information of equipment hung under gateway

[0032] Such as figure 1 As shown, this embodiment provides a method for obtaining information on devices connected to a gateway, which is applied to a first gateway operating in bridge mode, where a device connected to a DHCP client is connected to the first gateway, and the The first gateway is bridged as the second gateway of the DHCP server, and the downlink device communicates with the second gateway through the DHCP protocol to obtain the first IP address, and the downlink device selects the second gateway provided by the second gateway. Broadcast a DHCP selection message after the first IP address, and the second gateway receives the DHCP selection message through the first gateway, including:

[0033] Step S101: Start a DHCP monitoring process on the first gateway to monitor the DHCP selection message;

[0034] Specifically, the DHCP monitoring process needs to check the received DHCP selection message, if it is not a legitimate DHCP selection message, it is directly igno

[0074] Such as figure 2 As shown, based on the same inventive concept, this embodiment provides a device information acquisition system under the gateway, which is applied to the first gateway working in bridge mode, and the first gateway is connected with a DHCP client A downlink device, the first gateway is bridged as the second gateway of the DHCP server, the downlink device communicates with the second gateway through the DHCP protocol to obtain a first IP address, and the downlink device selects the The first IP address provided by the second gateway broadcasts a DHCP selection message, and the second gateway receives the DHCP selection message through the first gateway, including:

[0075] A monitoring module 201, configured to start a DHCP monitoring process on the first gateway to monitor the DHCP selection message;

[0076] An obtaining module 202, configured to obtain first device information of the downlink device based on the DHCP selection message after the DHCP se

[0090] Such as image 3 As shown, based on the same inventive concept, this embodiment provides an electronic device 300, including: a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and operable on the processor 320 , when the processor 320 executes the computer program 311, the following method steps can be realized:

[0091] Start a DHCP monitoring process on the first gateway to monitor the DHCP selection message; after monitoring the DHCP selection message, obtain the first device information of the downlink device based on the DHCP selection message , the first device information includes a first IP address; based on the second IP address and the first IP address, an ARP request packet is sent to the downlink device, wherein the second IP address is the first The second DHCP client inside the gateway obtains the IP address from the second gateway, and the second IP address is in the same network segment as the first IP address; when receivi