WO2014183521A1

WO2014183521A1 - Packet processing method and device

Info

Publication number: WO2014183521A1
Application number: PCT/CN2014/075409
Authority: WO
Inventors: 赵继诚
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-05-15
Filing date: 2014-04-15
Publication date: 2014-11-20
Also published as: CN104168199B; CN104168199A

Abstract

Disclosed are a packet processing method and device. The packet processing method comprises: receiving packet data from a first link via a first port corresponding to the first link of a plurality of links; and performing packet processing on the packet data by using a first packet processing manner corresponding to the first port of a plurality of packet processing manners, wherein the number of the plurality of packet processing manners is the same as that of the plurality of links. By means of the present invention, the effects of saving time for message search and matching and improving the packet processing efficiency of a network processor are achieved.

Description

Packet processing method and device

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a packet processing method and apparatus. BACKGROUND With the rapid development of network systems, intermediate devices of network systems have experienced the development stages of general-purpose processors, application-specific integrated circuits (ASICs), and general-purpose network processors. Due to the low cost and programmable flexibility of network processors, network processors are becoming more widely used. It is not enough for the network processor to have only the above two advantages, and it has to have higher performance than conventional ASIC chips. For example, the role of the network processor is mainly to control the processing of the package in software. Therefore, in addition to the design of the hardware itself, a good software design can also improve the packet processing performance of the network processor. 1 is a flowchart of a packet processing method of a network processor according to the related art. In the packet processing flow, the following steps are mainly included: (1) entering all physical links/channels in a physical link module. A legal packet enters the packet search matching identification module through a unique port; (2) The packet search matching identification module has prepared the service or channel corresponding entry in advance according to the configuration of the control software, and the packet search matches. The search engine or the HASH engine in the identification module searches and matches the internal entries one by one according to the characteristics of the incoming legal packets, and sends the matched legal packets to the packet processing module; (3) the packet processing module uses and The packet processing method associated with the entry processes the package. In this software design mode, a large number of search and matching operations of the message are required, so that the packet processing capability of the network processor is relatively low. It can be seen that the software design performance of the current network processor cannot meet the high performance requirements in the packet processing, resulting in a relatively low packet processing capability. Aiming at the problem that the packet processing capability of the network processor in the related art is relatively low, an effective solution has not been proposed yet. SUMMARY OF THE INVENTION The present invention provides a packet processing method and apparatus to solve at least the above problems. According to an aspect of the present invention, a packet processing method is provided, including: receiving packet data from a first link through a first port corresponding to a first link of a plurality of links; using a plurality of packet processing manners Medium and first end The first packet processing mode corresponding to the port performs packet processing on the packet data, where the number of multiple packet processing modes is the same as the number of multiple links. Preferably, the type of the first link includes: a physical link or a physical channel. Preferably, when the type of the first link is a physical link, the types of the links other than the first link of the plurality of links are physical links, and the other links include: the second link When the type of the first link is a physical channel, the types of the links other than the first link in the multiple links are physical channels, and the other links include: the second link. Preferably, the second link of the plurality of links corresponds to the second port of the plurality of preset ports, wherein the multiple ports include: the first port and the second port, the second port and the first port The ports are not the same. Preferably, the second port corresponds to a second packet processing manner of the plurality of packet processing modes. Preferably, the packet data includes: a legal message. According to another aspect of the present invention, a packet processing apparatus is provided, comprising: a receiving module, configured to receive packet data from a first link through a first port corresponding to a first link of the plurality of links; The processing module is configured to perform packet processing on the packet data by using a first packet processing manner that matches the first port in the multiple packet processing manner, where the number of the multiple packet processing modes is the same as the number of the multiple links. Preferably, the type of the first link includes: a physical link or a physical channel. Preferably, when the type of the first link is a physical link, the types of the links other than the first link of the plurality of links are physical links, and the other links include: the second link When the type of the first link is a physical channel, the types of the links other than the first link in the multiple links are physical channels, and the other links include: the second link. Preferably, the second link of the plurality of links corresponds to the second port of the plurality of preset ports, wherein the multiple ports include: the first port and the second port, the second port and the first port The ports are not the same. Preferably, the second port corresponds to a second packet processing manner of the plurality of packet processing modes. Preferably, the packet data includes: a legal message. According to the present invention, after a port having a corresponding relationship is set for each physical link or a physical channel, the packet processing mode can directly use the packet processing mode corresponding to the port to enter the legal packet. The method of processing the packet processing solves the problem that the packet processing capability of the network processor in the related art is relatively low, thereby achieving the effect of saving packet search and matching time and improving the packet processing efficiency of the network processor. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic flowchart of a packet processing method of a network processor according to the related art; FIG. 2 is a flowchart of a packet processing method according to an embodiment of the present invention; FIG. 3 is a packet processing apparatus according to an embodiment of the present invention; 4 is a schematic diagram of a process of a packet processing method according to a preferred embodiment of the present invention; and FIG. 5 is a schematic diagram of a control relationship between modules in a packet processing apparatus according to a preferred embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. This embodiment provides a packet processing method. 2 is a flowchart of a packet processing method according to an embodiment of the present invention. As shown in FIG. 2, the method mainly includes the following steps (step S202-step S204): Step S202, by using a first link with multiple links. The corresponding first port receives packet data from the first link. Step S204: Perform packet processing on the packet data by using a first packet processing manner corresponding to the first port in the multiple packet processing manners, where the number of the multiple packet processing modes is the same as the number of the multiple links. Through the above two steps, the packet processing operation of the legal packet can be directly performed by using the packet processing mode corresponding to the port for the packet after the port is configured for the physical link or the physical channel. In this embodiment, the type of the first link may include: a physical link or a physical channel. The above-mentioned multiple links may be physical links or physical channels. Of course, in practical applications, some links use physical links, and some links use physical channels. In this embodiment, (1) when When the type of the first link is a physical link, the type of the link other than the first link in the multiple links is a physical link, and the other links include: a second link; When the type of the first link is a physical channel, the types of the links other than the first link are physical channels, and the other links include: the second link. In this embodiment, the second link of the multiple links corresponds to the second port of the plurality of ports that are preset, wherein the multiple ports may include: a first port and a second port, and a second The port is not the same as the first port. Preferably, the second port corresponds to a second packet processing manner of the plurality of packet processing modes. In this embodiment, the packet data may include: a legal message. In a practical application, for a physical link or a physical channel, when all the packets are received, the illegal packets are discarded and only legitimate packets are transmitted. The packets of the port corresponding to the physical link or the physical channel are legal packets. When a port corresponding to each physical link or physical channel receives a legal packet, it does not need to look up and match the packet processing mode and the legal packet as in the existing packet processing mode. When a port is configured, a mapping relationship between the port and the packet processing mode is established. Therefore, the packet processing operation of the legal packet transmitted by the port can be directly performed by using the corresponding packet processing mode, thereby eliminating the search matching process and improving the processing. The efficiency of packet processing. This embodiment provides a packet processing apparatus. FIG. 3 is a structural block diagram of a packet processing apparatus according to an embodiment of the present invention. The apparatus is used to implement the packet processing method provided by the foregoing embodiment. As shown in FIG. 3, the apparatus includes: a receiving module 10 and a processing module 20. The receiving module 10 is configured to receive packet data from the first link by using a first port corresponding to the first link of the multiple links; the processing module 20 is connected to the receiving module 10, and is configured to use multiple The first packet processing mode that matches the first port in the packet processing mode performs packet processing on the packet data, where the number of multiple packet processing modes is the same as the number of multiple links. In this embodiment, the type of the first link may include: a physical link or a physical channel. Preferably, when the type of the first link is a physical link, the types of the links other than the first link of the plurality of links are physical links, and the other links include: the second link When the type of the first link is a physical channel, the types of the links other than the first link in the multiple links are physical channels, and the other links include: the second link. Of course, in practical applications, in a plurality of links, some links adopt physical links, and some links use physical channels are also feasible. In the packet processing apparatus provided in this embodiment, the second link of the plurality of links corresponds to the second port of the plurality of ports that are preset, wherein the multiple ports include: the first port and the second port Port, the second port is different from the first port. The second port corresponds to the second packet processing mode of the multiple packet processing modes. Preferably, the packet data may include: a legal message. The packet processing method provided by the above embodiment will be described in more detail below with reference to FIG. 4 and FIG. 5 and a preferred embodiment. In the following preferred embodiment, the entire packet processing flow will be described on the basis of four functional modules. First, the functions of the four function modules used below are appropriately explained: The control software module is responsible for controlling the process of packet processing by means of control software. The built-in software of the module integrates: physical link setting, message lookup Matches the settings that identify hardware entries, as well as the settings of the package processing and processes. Physical link module, the module includes: physical layer (Physical Layer, referred to as PHY) chip, Field-Programmable Gate Array (FPGA), or UFE3. The message search matching module, the module mainly includes some hardware entries inside the network processor, and a search and hash algorithm (Hash Function, referred to as HASH) engine. Packet processing module, which mainly contains some software resources inside the network processor, such as: buffer, queue, etc., mainly used to modify, add, delete operations. FIG. 4 is a schematic diagram of a process of a packet processing method according to a preferred embodiment of the present invention. As shown in FIG. 4, the process mainly includes: (1) for each link or channel of the physical link module, the packet is illegal. After being discarded, the legal packet is sent to a corresponding port (port) pre-allocated on the packet matching module. The port represents the channel and indirectly represents the processing requirements of the legal packet in the channel. The packet search matching module does not have to waste a lot of time to search and match in a large number of hardware tables, and can directly send the legal message to the packet processing module; (3) the packet processing module directly uses the corresponding transmission law. The packet processing mode of the port of the packet (that is, the packet processing mode associated with the port) performs packet processing operations on the legal packet (that is, the packet is modified, added, deleted). Please refer to FIG. 5 at the same time. FIG. 5 is a schematic diagram of a control relationship between modules in a packet processing apparatus according to a preferred embodiment of the present invention. As shown in FIG. 5, the control software module issues control commands to other three modules as needed. The entire packet processing process is controlled. After receiving the control command of the control software module, the physical link module configures physical attributes, receives legal packets (ie, legitimate packets) from the physical link or channel, and discards illegal packets (illegal packets). After the message search matching module accepts the control command of the control software module, prepare the corresponding hardware entry and the search, HASH engine, and once the package enters from the port, the package is not searched, matched, etc., but Direct package Sending to the packet processing module; the packet processing module directly processes the packet using a packet processing manner corresponding to a port (corresponding to each physical link or physical channel) that is preset in the packet search matching module terminal. In implementing the preferred embodiment (ie, implementing packet processing performance of the network processor), the configuration of the network processor can be controlled by the control software, wherein, for each channel service, the control software is configured. The process can include:

(1) According to the requirements of a channel service, the physical channel is configured, mainly PHY chip, FPGA, UFE3, and the like.

(2) Since the demand of one channel service determines the processing method of the packet on the channel, a packet processing method is added to the channel in the packet processing module. (3) Establish a port in the message lookup matching module, and use the port to associate the physical channel with the added packet processing method.

(4) When a packet enters the physical channel, the illegal packet is discarded and the legal packet enters the port.

(5) The switch that enters the search matching process on the port is closed, and the packet directly enters the packet processing method associated with the port.

(6) The packet processing method adds, deletes, and modifies the packet, and completes the packet processing process. The packet processing method and device provided by the foregoing embodiments can associate the physical channel and the packet processing method by using the added port, thereby avoiding the problem that the packet processing performance is relatively low due to the association method of finding the matching entry. Improve the packet processing efficiency of the network processor. From the above description, it can be seen that the present invention achieves the following technical effects: After a port having a corresponding relationship is set for each physical link or physical channel in advance, the packet after passing the port can be directly used and The packet processing mode corresponding to the port performs the packet processing operation on the legal packet, which solves the problem that the packet processing capability of the network processor in the related art is relatively low, thereby saving the time for packet search and matching, and improving network processing. The effect of the package processing efficiency. Industrial Applicability According to the technical solution provided by the present invention, a port having a corresponding relationship may be set for each physical link or physical channel in advance, and the packet processing method corresponding to the port may be directly used for the packet passing through the port. The packet is processed by a packet. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A packet processing method, comprising:

Receiving packet data from the first link through a first port corresponding to a first one of the plurality of links;

And performing packet processing on the packet data by using a first packet processing manner corresponding to the first port in a plurality of packet processing manners, where a number of the multiple packet processing manners and a number of the multiple links are identical.

2. The method according to claim 1, wherein the type of the first link comprises: a physical link or a physical channel.

The method according to claim 2, wherein when the type of the first link is the physical link, other links of the plurality of links except the first link The type is the physical link, where the other link includes: a second link;

When the type of the first link is the physical channel, the type of the link other than the first link of the multiple links is the physical channel, where the other chain The road includes: The second link.

The method according to claim 1, wherein the second link of the plurality of links corresponds to a second port of the plurality of ports that are preset, wherein the multiple ports include: The first port and the second port are different from the first port.

The method according to claim 4, wherein the second port corresponds to a second packet processing manner of the plurality of packet processing modes.

The method according to any one of claims 1 to 5, wherein the packet data comprises: a legal message.

7. A packet processing apparatus, comprising: a receiving module, configured to receive packet data from the first link through a first port corresponding to a first one of the plurality of links; a processing module, configured to perform packet processing on the packet data by using a first packet processing manner that matches the first port in a plurality of packet processing manners, where the number of the multiple packet processing manners is different from the multiple The number of links is the same.

8. The apparatus according to claim 7, wherein the type of the first link comprises: a physical link or a physical channel.

9. The device according to claim 8, wherein

When the type of the first link is the physical link, the type of the link other than the first link of the multiple links is the physical link, where Other links include: a second link;

The device according to claim 7, wherein the second link of the plurality of links corresponds to a second port of the plurality of ports that are preset, wherein the multiple ports include: The first port and the second port are different from the first port.

11. The apparatus of claim 10, wherein the second port corresponds to a second packet processing mode of the plurality of packet processing modes.

The apparatus according to any one of claims 7 to 11, wherein the packet data comprises: a legal message.