A nat penetration method based on kcp protocol

Abstract

The invention discloses a NAT penetration method based on the KCP protocol. First, a node in a P2P network needs to register NAT information with an auxiliary NAT penetration service node located on the public network, and then when the node needs to connect to another node, it uses the TCP protocol. When the node cannot be connected, first send the NAT penetration request to the service node, and the service node returns the network address and NAT penetration strategy of the other party to both parties according to the NAT information of the two nodes. Both nodes execute NAT penetration logic according to the received information, that is, first use UDP protocol for NAT penetration, if the penetration is successful, use KCP protocol to connect, otherwise, the NAT penetration fails this time. The invention solves the problem of high difficulty in NAT penetration by using TCP, improves the success rate by using UDP for NAT penetration, and simultaneously uses KCP protocol as a transport layer protocol to solve the problem of unreliable transmission of UDP protocol to a certain extent.

Description

technical field [0001] The invention relates to the fields of NAT type detection technology and UDP penetration, in particular to a NAT penetration method based on the KCP protocol. Background technique [0002] The full English name of NAT is "Network Address Translation", which means "Network Address Translation" in Chinese. It is an IETF (Internet Engineering Task Force, Internet Engineering Task Force) standard that allows an entire organization to appear with a public IP (Internet Protocol) address on the Internet. As the name suggests, it is a technology that translates internal private network addresses (IP addresses) into legal network IP addresses. NAT allows internal networks that use private addresses to connect to the Internet or other IP networks. [0003] Traditional traversal methods include TCP-based traversal and UDP-based traversal methods, both of which have defects to a certain extent; among them, the TCP-based traversal method has a connection-based mo...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problems of high difficulty in TCP NAT penetration and low reliability of UDP penetration, the present invention provides a NAT penetration method based on the KCP protocol, which can guarantee a higher success rate of NAT penetration and good reliability, specifically The technical solution is as follows:

Images