NAT traversing method based on combination server and node collaboration

Abstract

The invention provides an NAT traversing method based on combination a server and node collaboration. The method comprises: when a node is in an online state, an on-line message is sent to an NAT server; after the NAT server receives the node on-line message, an on-line reply message is returned based on the type of the node; after the node receives on-line reply message from the NAT serve, if the node determines that the node itself is an intranet node, a cooperative node is selected from an NAT cooperative node list to send a cooperation request message, and the cooperative node replies a cooperation request reply message and decides whether the node information is stored into the cooperation request; and a heartbeat is established between the node and the cooperative node, and NAT traversing is carried out by the cooperative node. With the method, NAT traversing can be realized by node collaboration, so that the bandwidth and concurrence of the NAT server can be reduced. Meanwhile, when the NAT server crashes in short term and the single point fails, NAT traversing of the node can still work normally, so that the system reliability can be improved.

Description

technical field [0001] The present invention relates to the technical field of Network Address Translation (NAT), in particular to a NAT traversal method combining server and node cooperation. Background technique [0002] With the continuous development of computer Internet technology, peer-to-peer (Peer-to-Peer, P2P) communication becomes more and more common. Due to the lack of network addresses in the current IPv4 network, NAT devices widely exist, making it difficult for nodes in different intranets to communicate directly, which largely limits the development of P2P applications. [0003] NAT traversal technology enables nodes in different intranets to communicate directly through some technical means. Commonly used NAT traversal techniques include STUN mode, TURN mode and so on. Using these NAT traversal technologies, nodes need to communicate with the server when performing NAT traversal, which puts certain requirements on the bandwidth and concurrency of the serve...

AI Technical Summary

Problems solved by technology

Due to the lack of network addresses in the current IPv4 network, NAT devices widely exist, making it difficult for nodes in different intranets to communicate directly, which largely limits the development of P2P applications.

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