Method and equipment for establishing TCP (Transmission Control Protocol) connection

Abstract

The invention discloses a method and equipment for establishing TCP (Transmission Control Protocol) connection. The method comprises the steps that: a Target (connection receiving equipment) determines the positions of an Initiator (connection initiating equipment) and the Target; when the Target is determined to be positioned in a private network and the Initiator is determined to be positioned in a public network, and NAT equipment is positioned between the Target and the Initiator, the Target sends a TCP connection request message to the Initiator so as to establish the TCP connection between the Target and the Initiator. According to the method and equipment for establishing TCP connection, the normal establishing the TCP connection can be ensured, and message transmission can be normally performed between the Target and the Initiator.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and equipment for establishing a TCP connection. Background technique [0002] Such as figure 1 As shown, it is a schematic diagram of NAT (Network Address Translation, Network Address Translation), Host (host) A has a private network address 192.168.1.3; when Host A needs to access the external network, the public network address (such as 20.1. 1.1), and generate address translation entries of 192.168.1.3:1537 and 20.1.1.1:2001, after which the source addresses of the packets sent by Host A to the external network are converted to 20.1.1.1:2001 by NAT; the external network sends to 20.1 The destination addresses of the .1.1:2001 packets are converted to 192.168.1.3:1537 by NAT. It should be noted that when Host A does not take the initiative to connect to the external network, there will be no address translation entry for Host A on the NAT device, and hosts on ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, if a NAT device is deployed between the Initiator and the Target, the Initiator and the Target cannot perceive the NAT device; and since the Initiator is the active initiator of the protocol interaction process, when the Initiator is deployed on the public network, the Target is deployed on the private network. When connecting to the network, the protocol interaction process cannot be realized, that is, the TCP connection cannot be established normally, so that the message transmission between the Initiator and the Target cannot be performed.

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