Method and device for intercommunicating TCP (Transmission Control Protocol) connection with SCTP (Stream Control Transmission Protocol) connection

Abstract

The invention provides a method for intercommunicating a TCP (Transmission Control Protocol) connection with an SCTP (Stream Control Transmission Protocol) connection, which comprises the steps of: receiving a request for establishing a communication connection with a target end, wherein the request is initiated by a source end and carries address information of the source end and the target end, one end of the source end and the target end is a TCP host machine and the other end of the source end and the target end is an SCTP host machine; initiating a communication connection establishing process of the target end according to the address information of the source end and the target end; and when the communication connection of the target end is established, initiating a communication connection establishing request aiming at the source end for continuing the communication connection establishing process of the source end. According to the invention, on the basis of any correction on traditional upper layer application and operating system thereof and any limit on the use of the upper layer application, the correctness and the reliability of upper layer application signaling transmission are enhanced.

Description

technical field [0001] The invention relates to the technical field of signaling communication, in particular to a method for intercommunication between a TCP connection and an SCTP connection and a device for intercommunication between a TCP connection and an SCTP connection. Background technique [0002] In the past 20 years, as a reliable data transmission method, TCP has provided many application services, but with the multi-service of IP network, especially the development of VolP, TCP has many limitations, such as for VolP signaling and asynchronous transaction-based application processing. In order to adapt to the development trend of IP network becoming the core network of telecom operation, IETF's Signaling Transmission Working Group (SIGTRAN) has been researching and formulating a new generation of transmission protocol for IP network, and defined Stream Control Transmission Protocol (SCTP) in IETF RFC 2960 , Stream Control Transmission Protocol). SCTP is a conne...

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Problems solved by technology

[0009] 1. It is not flexible to use, and it needs to modify the TCP\IP protocol stack of the upper layer application to realize it. When the TCP / IP protocol stack used is the protocol stack of the operating system, it may also be necessary to recompile the kernel to complete the addition of the Shim Layer;

[0010] 2. Unable to send and receive Socket data of TCP protocol in non-blocking mode

This is mainly because the Shim Layer is application-driven, that is, when the application requests an action in blocking mode on the Socket, such as Connect or Recv, it needs to be replaced by the corresponding function of the SCTP protocol through the Shim Layer, and returns Its execution result; but when the non-blocking mode is used, the corresponding replacement cannot be performed through Select or Poll polling, that is, Select or Poll cannot identify whether it is a real SCTP protocol socket or an upper layer application that uses the Shim Layer layer to simulate the TCP protocol

[0011] 3. Since the Shim Layer is independent, it should be adapted to any upper-layer application. However, the TCP protocol data is in a stream format, and each sending and receiving message may not be complete, while the SCTP protocol is a message-oriented protocol. Every time The sending and receiving data boundaries are complete. If no processing is done at the Shim Layer layer, incomplete TCP data packets may be transmitted on the SCTP protocol, resulting in receiving errors at the peer end.

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