Network layer NAT traversal algorithm of distributed network

Abstract

The invention provides a network layer NAT (Network Address Translation) traversal algorithm of a distributed network, and the network layer NAT traversal algorithm of the distributed network comprises the following steps: S1, any scheduling node in the same distributed network receives a data packet sent by an adjacent traversal node, and the data packet comprises an IP (Internet Protocol), a port number and a hash value corresponding to request content of the traversal node; s2, the scheduling node locates a traversed node storing the request content according to a hash value corresponding to the request content in the data packet; s3, the scheduling node guides the traversing node and the traversed node to traverse; according to the network layer NAT traversal algorithm of the distributed network provided by the invention, any scheduling node in the same distributed network receives the data packet which is sent by the adjacent traversal node and carries the hash value corresponding to the request content, so that the specific traversal node can be positioned according to the content; therefore, the crossing node and the crossed node can quickly and accurately pass through each other, and the connection is established.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a network layer NAT traversal algorithm of a distributed network. Background technique [0002] Libp2p is the infrastructure of IPFS and Filecoin, and also the infrastructure of all P2P, blockchain, and Internet of Things in the future. Libp2p is a P2P network, which is divided into network layer, routing layer, and exchange layer. Discovering nodes, connecting them, discovering content, and transferring them, a node using Libp2p can communicate with another node, can use a variety of different transmission methods, these transmission methods include connection delays, and communicate through different protocols, And negotiate according to the needs. The Libp2p module is mainly responsible for the data transfer function in IPFS, that is, routing, network, exchange, etc. With the increasing popularity of the network and more and more computers connected to the Internet, it ...

AI Technical Summary

Problems solved by technology

With the increasing popularity of the network and more and more computers connected to the Internet, it is increasingly difficult to match IP address resources. The NAT technology that appeared in 1994 can just solve the above problems, but it is difficult for hosts in different LANs to be directly connected, so Intranet traversal technology has appeared again. The traversal technology usually requires a server to coordinate and drill holes, that is, the participation of an external network server is required to realize the traversal between two nodes, which increases security risks.

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