Method and device for stateful conversion between IPv4 address and IPv6 address

An IP address and state transition technology, applied in the network field, can solve problems such as inefficient search methods and equipment performance bottlenecks, and achieve the effect of saving storage space and ensuring high efficiency

Inactive Publication Date: 2014-12-24
北京太一星晨信息技术有限公司
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  • Claims
  • Application Information

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Problems solved by technology

At the same time, if the search method is not efficient enough,

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  • Method and device for stateful conversion between IPv4 address and IPv6 address
  • Method and device for stateful conversion between IPv4 address and IPv6 address
  • Method and device for stateful conversion between IPv4 address and IPv6 address

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[0054] Example

[0055] In this embodiment, the stateful conversion between the IPv4 address and the IPv6 address is implemented based on the message connection tracking mechanism.

[0056] Conntrack is a common connection management method at the network layer. The so-called connection tracking is to track and record the connection status. For receiving a connected IP packet, the connection tracking mechanism first searches for the connection record (Connection entry). When searching, it is based on the five-tuple in the IP packet network layer and transport layer header information to the connection tracking table. Perform a search for the 5-tuple. If it is not found, a connection entry is generated for the connection. Thereafter, all IP packets belonging to this connection are uniquely assigned to this connection. In a connection record, information such as the five-tuple of the two directions of the IP packet, the survival time, and the status of the connection at the curre...

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Abstract

Disclosed are a method and a device for stateful conversion between IPv4 address and IPv6 address. The method includes, after receiving an IP message, searching corresponding connection entry in a connection track table according to quintuple which includes IP address and ports of first protocol and is constructed by information of the IP message, and generating new connection entry if searching no records in the connection track table; performing cross-protocol-stack address conversion to the IP message and converting the IP address and port of the first protocol into the IP address and port of a second protocol; constructing quintuple of the IP message in the other direction according to the IP address and port of the second protocol, and writing the quintuple constructed by the IP message and the quintuple in the other direction into the new connection entry and mounting the same to the connection track table. The first protocol and the second protocol are respectively one of the IPv4 protocol and the IPv6 protocol and are different from each other. The invention further provides the corresponding device. By the method and the device, cross-protocol-stack address conversion with high search efficiency can be achieved while storage space can be saved.

Description

technical field [0001] The present invention relates to network technology, more specifically, to a method and equipment for stateful conversion between IPv4 addresses and IPv6 addresses. Background technique [0002] The IPv6 protocol stack, as the next-generation IP protocol replacing the IPv4 protocol, has been widely promoted and implemented around the world, but for users who use the IPv4 protocol stack as the mainstream choice, how to achieve a smooth transition from the IPv4 environment to the IPv6 environment has become a more important and practical issues. [0003] Currently proposed IPv4 address and IPv6 address conversion methods are divided into two types: stateful conversion and stateless conversion. Among them, the stateful conversion refers to maintaining the mapping relationship between the IPv4 address and port and the IPv6 address and port, and the conversion is performed based on this mapping relationship. Stateless means that according to the specified...

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Application Information

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IPC IPC(8): H04L29/12H04L12/749H04L45/741
Inventor 姜殊佳
Owner 北京太一星晨信息技术有限公司
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