Method for discovering and connecting digital cameras at different network segments in local area network

Abstract

The invention provides a method for discovering and connecting digital cameras at different network segments in a local area network. The method includes the following processes: 1, monitoring and receiving an ARP message from a local area network; 2, extracting a network card IP sent by a terminal and a network segment where the network card IP is located from the ARP message, and recording the terminal IP and the network segment thereof; 3, according to the network segment where the terminal IP is located, when a user searches for a digital camera, adding an unoccupied IP address of the recorded network segment to a local network card, and reserving an original IP of the network card; 4, sending a search protocol message to the terminal by using the same network segment IP, and obtaining feedback information; and 5, the user performs data connection on the digital camera by adding the network IP where the digital camera is located. According to the method, through the mode of addingan IP on a network card of a video recorder, the camera in the local area network can be discovered through a broadcast search protocol, the camera can also be connected, and the phenomenon that theuser performs cumbersome IP allocation and configuration can be avoided.

Description

technical field [0001] The invention belongs to the field of video monitoring, in particular to a method for discovering and connecting digital cameras in different network segments in a local area network. Background technique [0002] Address Resolution Protocol, namely ARP (Address Resolution Protocol), is a TCP / IP protocol that obtains a physical address based on an IP address. When the host sends information, it broadcasts the ARP request containing the target IP address to all hosts on the network, and receives the return message to determine the physical address of the target; after receiving the return message, store the IP address and physical address in the local ARP In the cache and keep it for a certain period of time, the next request will directly query the ARP cache to save resources. Each digital camera that uses the TCP / IP protocol must have the MAC address of the target host to correctly send data to the target host. The MAC address corresponding to the ta...

AI Technical Summary

Problems solved by technology

But this increases the burden of user configuration and affects user experience

For example, suppose the IP address of the video recorder in the LAN is 10.30.31.68 and the subnet mask is 255.255.255.0, and there are cameras with IP addresses 192.168.2.6 and 192.168.1.99 in the LAN. protocol, it is impossible to obtain feedback from the camera, and in the LAN, it is also impossible to manually add IP to connect to cameras on different network segments

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