Realization method and message forwarding method of IPv6 tunnel on multi-core platform

Abstract

The invention discloses a realization method and a message forwarding method of an IPv6 tunnel on a multi-core platform. In the realization method of the tunnel, one Hash value is calculated for each configured tunnel according to the configured source address and a target address of the tunnel, and a tunnel control structure comprising other configurations is inserted into a corresponding Hash linked list. In the message forwarding method, a flow concept is introduced to a common flow. At the beginning of message processing at a protocol stack, one dflow list item is initialized, and each module through the common flow mounts the respective-needed information on the list item. The dflow list item is confirmed before successful forwarding, then a series of list lookup work can be saved for the following similar messages and rapid forwarding can be directly realized. Inquiring speed of the tunnel can be accelerated in receiving an IPv4 message without influencing the number of the tunnel. Meanwhile, the forwarding dflow process can be established so that repetitive inquiring of configuration is avoided and thus forwarding speed is accelerated.

Description

technical field [0001] The invention relates to a transition technology from IPv4 to IPv6, in particular to a method for realizing an IPv6 tunnel on a multi-core platform and a corresponding message forwarding method. Background technique [0002] IPv6 is a new generation of Internet communication protocol with many functions and features. However, considering that there are already a large number of networks and nodes connected to the Internet, the transition to IPv6 must be gradual. One of the important transition technologies is to rely on protocol tunneling, which will come from The IPv6 packets of IPv6 islands are encapsulated in IPv4 packets, and then transmitted in the widely distributed IPv4 ocean. [0003] Since the tunnel of IPv6-over-IPv4 (that is, IPv6 data packets encapsulated in IPv4 packets) runs on the edge dual-stack routers of IPv6 islands, and tunnel-based technologies require routers to repeatedly decapsulate, encapsulate packets, and IPv4 Packet tunnel ...

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Problems solved by technology

[0003] Since the tunnel of IPv6-over-IPv4 (that is, IPv6 data packets encapsulated in IPv4 packets) runs on the edge dual-stack routers of IPv6 islands, and tunnel-based technologies require routers to repeatedly decapsulate, encapsulate packets, and IPv4 Packet tunnel positioning and other actions, for modern networks that have higher and higher requirements on forwarding performance, the time consumption of the above actions may become a bottleneck that affects the forwarding performance of the whole machine. Due to the nature of the virtual port of the tunnel, the When an IPv4 message needs to be searched for the corresponding tunnel to decapsulate the message, especially when a large number of tunnels are configured, simple search methods such as traversal will bring disastrous consequences to the forwarding performance

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