Method of enabling devices and services based on mDNS protocol to discover mutually in local area network

Abstract

The present invention discloses a method of enabling devices and services based on an mDNS protocol to discover mutually in a local area network. The method comprises the steps of joining a first device in the local area network after the first device starts, and obtaining an IP address; monitoring the 5353 ports and joining in a multicast group; sending a detection instruction, renaming when the devices having the same name are detected in the local area network, otherwise creating an on-line declaration message; carrying out the on-line declaration message multicast on the 5353 port of a multicast address, and broadcasting the on-line declaration message to the 5353 port of a broadcast address; joining a second device in the local area network in a same manner, carrying out the on-line declaration message multicast on the 5353 port of the multicast address, and broadcasting the on-line declaration message to the 5353 port of the broadcast address; using the first or second device to send out a detection message, and carrying out the declaration unicast after the detection message of an opposite side is received, thereby finishing the mutual discovery of devices. According to the present invention, the devices not supporting or not completely supporting the mDNS protocol in the local area network can discover mutually and normally without needing to support other discovery protocols, thereby reducing the cost.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for enabling devices and services based on the mDNS protocol to discover each other in a local area network. Background technique [0002] With the widespread application of mDNS (multicast DNS, multicast DNS) in Apple products (iphone, ipad, Mac, etc.), and more and more hardware and software manufacturers supporting the mDNS protocol in their devices, the mDNS protocol has basically become It has become an industry standard for mutual discovery of devices and services in a LAN. The most common use of mDNS is in a LAN. In a LAN, when a host communicates with other hosts, it needs to know the IP address of the other host. However, in general In the local area network using DHCP (Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol) to dynamically assign IP addresses, the IP address of each host is assigned by the DHCP server, so sometimes it is ...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that when the existing solution solves the problem of mutual discovery between devices, the problem of high cost due to the increase of the protocol

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