CN102111403B - Method and device for acquiring transmission control protocol (TCP) connection data at high speed - Google Patents

Method and device for acquiring transmission control protocol (TCP) connection data at high speed Download PDF

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CN102111403B
CN102111403B CN 201010608983 CN201010608983A CN102111403B CN 102111403 B CN102111403 B CN 102111403B CN 201010608983 CN201010608983 CN 201010608983 CN 201010608983 A CN201010608983 A CN 201010608983A CN 102111403 B CN102111403 B CN 102111403B
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tcp
connection
data
packet
host
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CN102111403A (en )
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刘朝辉
张英文
李静
张磊
白宗元
纪奎
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曙光信息产业(北京)有限公司
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Abstract

本发明提供了一种用于高速获取TCP连接数据的方法和设备。 The present invention provides a method and apparatus for high speed data acquiring TCP connection. 硬件网卡接收到报文并进行TCP连接管理后,对没有乱序的报文。 After receiving the message card hardware and TCP connection management, not out of order packets. 添加记录TCP连接的信息报头后,直接上传给主机;对发生了乱序的报文进行TCP乱序数据的重新排序,但排序过程不使用缓冲器进行数据拼接;API接口库接收到TCP报文后再进行数据拼接和TCP数据格式转换等操作。 After adding records the TCP connection information of the header, directly uploaded to the host; of packet disorder occurs reorder TCP out of order, but the sorting process without using a buffer for data registration; the API interface library receives a TCP packet TCP data and then spliced ​​data format conversion operations. 本发明既能及时把报文提交给主机,又能方便实现原始报文数据到TCP数据格式的转换,起到数据拼接的作用,整个系统可以实现高速的获取TCP数据。 The present invention is not only timely message submitted to the host, but also facilitate the realization of original packet data TCP data format conversion, data registration functions, the entire system can realize high-speed data acquisition TCP.

Description

一种用于高速获取TCP连接数据的方法和设备 A method and apparatus for obtaining high-speed data connection for TCP

技术领域 FIELD

[0001] 本发明涉及网络数据处理领域,具体涉及一种用于高速获取TCP连接数据的方法和设备。 [0001] The present invention relates to a data processing network, and in particular relates to a method and apparatus for high speed data acquiring TCP connection.

背景技术 Background technique

[0002] TCP卸载技术是把主机软件中的TCP/ip网络协议栈处理固化到网卡硬件中实现,以便降低系统CPU负载,增大网络IO带宽的技术。 [0002] TCP offloads the host software is TCP / ip network protocol stack implemented in hardware cured to the card, in order to reduce the system CPU load increase IO bandwidth network technology. TCP卸载系统一般包括两部分功能,第一部分是TCP连接状态管理,用TCP连接表来维护每个TCP连接开始、数据传输、关闭的状态。 TCP offload system generally includes two functional portions, a first portion of the TCP connection state management table to maintain the TCP connection with the state of each TCP connection start data transmission, closed. 第二部分是TCP数据管理,用来把乱序的TCP报文的数据进行重新排序,把TCP传输的数据提取出来提交给主机。 The second part is the TCP data management for the out of order TCP packet reordering data, the transmission data is extracted TCP submitted to the host.

[0003] 一般在TCP卸载系统中,硬件在进行TCP数据管理时,要使用一个数据缓存器,把每个TCP连接的数据提取出来,用缓冲器完成TCP数据的重排序和拼接,然后以缓冲区为单位向主机系统提交。 [0003] In general TCP offload system, during TCP data management hardware, to use a data buffer, the data extracted from each TCP connection, and reordering buffer to complete the splicing of the TCP data, then the buffer District submitted to the host system as a unit.

[0004] 申请号200680026247.4公开了一种透明传输控制协议(TCP)卸载的方法和系统,所述方法的各个方面包括:在网络接口卡处理器中收集TCP段,但不将状态信息转移到主机系统。 Various aspects [0004] Application No. 200680026247.4 discloses a transparent transmission control protocol (TCP) unloading method and system, the method comprising: collecting TCP segment processor in a network interface card, but not in the transfer status information to the host system. 收集的TCP段缓存在结合器中。 TCP segments collected in the binding buffer vessel. 结合器可检验与收集的TCP段相关的网络流在流查找表(FLT)中具有入口。 May be combined with the collected test related network TCP segment stream flow lookup table (FLT) having an inlet. 当FLT已满时,结合器可关闭当前入口,并将网络流指派到可用入口。 When FLT is full, it can be closed in conjunction with the current entry, and assigning the stream to the available network entry. 结合器也可更新FLT中的信息。 It may also be incorporated in the update information FLT. 当终止TCP段收集的事件发生时,结合器可基于收集的TCP段生成单个聚合的TCP段。 When termination of a TCP segment collection events, may generate a single combined polymerizable TCP segments based on the collected TCP segment. 可将聚合的TCP段和状态信息传送到主机以进行处理。 TCP segments may be aggregated and status information to the host for processing.

[0005] 申请号03820350.2公开了一种TCP卸载的系统和方法。 [0005] Application No. 03820350.2 discloses a system and a method for TCP offload. 在TEEC上接收输入TCP分组,并由所述TEEC处理所述输入分组的至少一部分一次,而不必由所述TEEC进行任何重组和/或重发。 On receiving an input TEEC TCP packet, the TEEC by processing the input at least part of a packet, without having to make any recombinant and / or retransmission by the TEEC. 至少一部分所述输入TCP分组可缓存在所述TEEC的至少一个内部弹性缓存器中。 The input TCP packets may be cached in at least a portion of said at least one inner TEEC elastic buffer. 所述内部弹性缓存器可包括接收内部弹性缓存器和/或发送内部弹性缓存器。 The internal elastic buffer may comprise an internal elastic buffer receiving and / or transmitting the internal elastic buffer. 因此,至少一部分所述输入TCP分组可缓存在所述接收内部弹性缓存器中。 Thus, at least a portion of the input buffer in the TCP packet may be received inside the elastic buffer. 至少一部分所述处理过的输入分组可放进一个主机存储器的一部分中,以便由主机处理器或CPU进行处理。 At least a portion of the treated group may be input into a part of the host memory, for processing by the host processor or CPU. 此外,至少一部分所述处理过的输入TCP分组可DMA传送到所述所述主机存储器的一部分中。 Further, at least a portion of said processed input TCP packet may be part of the DMA transfer to the host memory.

[0006] 用一般TCP卸载系统获取TCP数据的缺点是,有些应用业务需要对TCP数据实时处理,主机需要及时拿到TCP传输的数据,一般TCP卸载系统需要硬件拼接一定量的数据后再提交给主机,虽然有利于提高系统带宽,但是降低了系统的响应速度。 [0006] to obtain TCP data TCP offload system with general drawback is that some business applications require real-time processing of TCP data, the host needs to get the timely transmission of data TCP, TCP offload general hardware splicing system requires a certain amount of data for submission to the host, may help to increase system bandwidth, but reduces the response speed of the system.

发明内容 SUMMARY

[0007] 本发明目的是提供一种系统把TCP数据及时上传主机,避免TCP数据在硬件中拼接。 Objective [0007] The present invention is to provide a system for the timely data upload TCP host, to avoid TCP data registration in hardware.

[0008] 一种用于高速获取TCP连接数据的方法,包含以下步骤: [0008] A method for high speed acquiring TCP connection data, comprising the steps of:

[0009] A、专用芯片通过网络接口接收到TCP报文后,从报文中提取出TCP连接信息,并把原始报文暂存到板载内存中; [0009] A, after receiving the special chip TCP packets through the network interface, the packet is extracted from the TCP connection information, and the original packet temporarily stored in the onboard memory;

[0010] B、专用芯片根据报文的TCP连接信息,查询板载内存中的TCP连接表,如果是新建立连接的报文,就在连接表中给该连接增加一个新的表项;如果是关闭连接的报文,就把连接表中该连接的表项删除;如果是已经建立连接的数据报文,则在连接表项中记录该连接的当前状态; [0010] B, a dedicated chip connection according to the TCP packet, query onboard memory TCP connection table, if the new connection establishment message, to the connection to add a new entry in the connection table; if closing message is connected, put the connection entry is deleted table in the connection; if it is already set up a data packet connection, is recorded in connection entry in the current state of the connection;

[0011] C、对于TCP数据报文,专用芯片根据连接表项中记录的状态,判断该报文是否发生了乱序,如果没有乱序,则直接上传给主机;如果发生乱序,则把报文放入链表,等待后继报文进行重新排序,排序完成后,以报文为单位上传主机; [0011] C, for a TCP packet, a dedicated chip according to the state recorded in the connection table entry, whether the packet has occurred out of order, if not out of order, is uploaded to the host directly; disorder occurs if, put packets in the list, waiting for subsequent packet reordering, after sequencing is complete, the message is to upload the host unit;

[0012] D、网卡在向主机提交报文前,在报文的封装头前增加一个自定义的报头结构,保存该TCP连接的信息; [0012] D, before submitting NIC packet to the host, increasing a custom header structure before encapsulation header packet, save the information of the TCP connection;

[0013] E、驱动软件把报文从网卡板载内存传输到主机内存; [0013] E, the driver software from the card to the packet memory to the host memory board;

[0014] F、应用软件通过API接口库读取TCP数据时,接口库软件从主机内存中读取原始报文,根据报文附加的信息头,定位TCP数据,把原始报文数据结构,转换成应用需要的TCP数据结构。 When the [0014] F, TCP application software reads the data through the API interface library, the software library interface to read the original message from the host memory, the additional information based on packet header, TCP positioning data, the original message data structure, converted TCP application data into the required structure.

[0015] 本发明的一种优选技术方案在于:发生乱序后的排序过程使用报文链表,不使用拼接缓冲器,只对报文重新排序,不进行TCP数据的拼接。 [0015] In a preferred aspect of the present invention is that: after the sorting process occur with packets out of sequence list, without using splicing buffer, reorder packets only, not spliced ​​TCP data.

[0016] 本发明的再一优选技术方案在于:所述D步骤中保存的TCP连接信息包括连接状态、TCP数据在报文中的偏移。 [0016] A further preferred aspect of the present invention is: D saved in the step of the connection status information includes TCP connection, TCP data offset in the packet.

[0017] 一种用于高速获取TCP连接数据的设备,包括网卡和主机软件部分, [0017] A method for obtaining a high-speed TCP connection data device, including network interface cards and host software portion,

[0018] 所述网卡包括专用芯片、网络接口和板载内存; [0018] The card comprises a dedicated chip, and network interface board memory;

[0019] 所述主机软件部分包括网卡驱动和应用软件API接口库。 The [0019] main portion includes NIC driver software and application software API interface library.

[0020] 本发明的一种优选技术方案在于:所述专用芯片为网卡的主控芯片,运行所有的报文处理逻辑。 [0020] In a preferred aspect of the present invention is that: the special chip for the master chip card, run all the message processing logic.

[0021] 本发明既能及时把报文提交给主机,又能方便实现原始报文数据到TCP数据格式的转换,起到数据拼接的作用,整个系统可以实现高速的获取TCP数据。 [0021] The present invention can not only timely message submitted to the host, but also facilitate the realization of original packet data TCP data format conversion, data registration functions, the entire system can realize high-speed data acquisition TCP.

附图说明 BRIEF DESCRIPTION

[0022] 图1是本发明系统结构图具体实施方式 [0022] FIG. 1 is a system configuration diagram according to the present invention DETAILED DESCRIPTION

[0023] 本技术方案是一个软硬件一体的设备,硬件是以专用芯片为主要器件设计的网卡,包括网络接口,专用芯片,板载内存构成。 [0023] The present aspect is a device integrated hardware, ASIC hardware is designed as the main components of the card, including a network interface, a dedicated chip, onboard memory configuration. 软件由网卡驱动和应用软件API接口库构成。 Software consists NIC driver and application software API interface library.

[0024] 系统每部分的功能如下: The function of each part of the [0024] system as follows:

[0025] (I)网络接口:把网络报文数据接收进网卡。 [0025] (I) Network interface: receiving the network packet data into the card.

[0026] (2)专用芯片:网卡的主控芯片,运行所有的报文处理逻辑。 [0026] (2) dedicated chip: a master chip card, run all the message processing logic.

[0027] (3)板载内存:存储TCP连接管理用的连接表,暂存报文。 [0027] (3) onboard memory: a storage management table TCP connection with the buffered packets.

[0028] (4)网卡驱动:管理配置网卡,为网卡向主机的数据传输提供通路。 [0028] (4) as well: NIC configuration management, network adapter provides a pathway for data transmission to the host.

[0029] (5)API接口库:连接网卡系统和应用软件的编程接口,把网卡提交给主机的报文格式转换成应用软件需要的TCP数据格式。 [0029] (5) API interface library: card connector systems and applications programming interface, converts the card presented to the host application packet format to the format required for TCP data. [0030] 该设备的处理方法和过程如下: [0030] The processing procedure of the method and apparatus as follows:

[0031] (I)硬件网卡接收报文。 [0031] (I) a hardware card to receive packets.

[0032] 专用芯片通过网络接口接收到TCP报文后,从报文中提取出TCP连接信息,并把原始报文暂存到板载内存中。 After the [0032] ASIC receives a TCP packet through a network interface, packets extracted from the TCP connection information, and the original packet temporarily stored in the onboard memory.

[0033] (2)硬件网卡进行TCP连接管理。 [0033] (2) a TCP connection management NIC hardware.

[0034] 专用芯片根据报文的TCP连接信息,查询板载内存中的TCP连接表,如果是新建立连接的报文,就在连接表中给该连接增加一个新的表项,如果是关闭连接的报文,就把连接表中该连接的表项删除,如果是已经建立连接的数据报文,则在连接表项中记录该连接的当前状态。 [0034] ASIC packets based on TCP connection information, query on-board TCP connection table in memory, if it is newly established message connection, it is to the connection in the connection table to add a new entry, if it is off message connection, put the connection table of the connection entry is deleted, if it is already set up a data packet connection, it records the current status of the connection in the connection table entry.

[0035] (3)网卡硬件进行TCP乱序数据的重新排序,但不进行数据拼接。 [0035] (3) the network card hardware reorder out of order TCP data, but no data splicing.

[0036] 对TCP数据报文,专用芯片根据连接表项中记录的状态,判断该数据报文是否发生乱序,如果没有乱序,则直接上传给主机;如果发生乱序,则把报文放入链表,等待后继报文进行重新排序,排序完成后,以报文为单位上传主机。 [0036] The TCP packet data, a dedicated chip according to the state recorded in the connection table entry, it is determined whether the data packet reordering occurred, if there is no out of order, is uploaded to the host directly; disorder occurs if, put the packet Add to the list, waiting for subsequent packet reordering, after sequencing is complete, the message is to upload the host unit. 这个排序过程使用报文链表,不使用拼接缓冲器,不进行TCP数据的拼接。 This sorting process using the message list, without the use of stitching buffer, without stitching TCP data.

[0037] (4)网卡硬件给报文添加信息报头,记录TCP连接信息。 [0037] (4) the NIC hardware add information to the packet header, the TCP connection information is recorded.

[0038] 网卡在向主机提交报文前,在报文的封装头前增加一个自定义的报头结构,其中保存该TCP连接的信息,包括连接状态、TCP数据在报文中的偏移等。 [0038] NIC submitting to the host before the packet, increasing the header structure a custom before encapsulation header packet, wherein the stored information of the TCP connection, including a connection state, TCP data offset like packets.

[0039] (5)驱动软件把报文从网卡板载内存传输到主机内存。 [0039] (5) driver software from the card to the packet memory to the host memory onboard.

[0040] (6) API接口库进行数据格式转换。 [0040] (6) API library interface to the data format conversion.

[0041] 应用软件通过API接口库读取TCP数据时,接口库软件从主机内存中读取原始报文,根据报文附加的信息头,定位TCP数据,把原始报文数据结构,转换成应用需要的TCP数据结构。 When the [0041] TCP applications to read data through the API interface library, the software library interface to read the original message from the host memory, the additional information based on packet header, TCP positioning data, the original message data structure, converted into application needed TCP data structures.

[0042] 本发明已经在曙光生产的网络安全专用服务器中使用,取得了良好的效果。 [0042] The present invention has been used in a dedicated network security server dawn production, and achieved good results.

Claims (3)

  1. 1.一种用于高速获取TCP连接数据的方法,其特征在于:包含以下步骤: A、专用芯片通过网络接口接收到TCP报文后,从报文中提取出TCP连接信息,并把原始报文暂存到板载内存中; B、专用芯片根据报文的TCP连接信息,查询板载内存中的TCP连接表,如果是新建立连接的报文,就在连接表中给该连接增加一个新的表项;如果是关闭连接的报文,就把连接表中该连接的表项删除;如果是已经建立连接的数据报文,则在连接表项中记录该连接的当前状态; C、对于TCP数据报文,专用芯片根据连接表项中记录的状态,判断该报文是否发生了乱序,如果没有乱序,则直接上传给主机;如果发生乱序,则把报文放入链表,等待后继报文进行重新排序,排序完成后,以报文为单位上传主机; D、网卡在向主机提交报文前,在报文的封装头前增加一个自定义的报头结构, CLAIMS 1. A method for high speed acquiring TCP connection data, characterized by: comprising the steps of: A, after receiving the ASIC TCP packet extracted from the packets through the network interface in the TCP connection information, and the original message Wen temporarily stored in the onboard memory; B, a dedicated chip connection information packets based on TCP, TCP connection table query onboard memory, if it is newly established message connection, it is to increase the connection in a connection table the new entry; if it is off the packet connection put the connection table of the connection entry is deleted; if it is already set up a data packet connection, it records the current status of the connection in the connection table entry; C, for TCP data, a dedicated chip according to the state recorded in the connection table entry, whether the packet has occurred out of order, if not out of order, is uploaded to the host directly; disorder occurs if, put the packets in the list waiting for a subsequent packet reordering, after the sort is complete, to upload the message to the host unit; D, card before submission packet to the host, increasing a custom header structure before encapsulation header packet, 存该TCP连接的信息; E、驱动软件把报文从网卡板载内存传输到主机内存; F、应用软件通过API接口库读取TCP数据时,接口库软件从主机内存中读取原始报文,根据报文附加的信息头,定位TCP数据,把原始报文数据结构,转换成应用需要的TCP数据结构。 The information stored TCP connection; E, the driver software onboard memory packet from the memory card to the host; when F., TCP application software reads data through the API interface library, the software library interface to read the original message from the host memory the additional information packet header, TCP positioning data, the original packet data structure, the data structure into TCP application needs.
  2. 2.如权利要求1所述一种用于高速获取TCP连接数据的方法,其特征在于:发生乱序后的排序过程使用报文链表,不使用拼接缓冲器,不进行TCP数据的拼接。 2. A method according to claim 1 obtaining a high-speed data for a TCP connection, characterized in that: the sorting process occur with the scrambled packet linked list buffer is not spliced, splicing without TCP data.
  3. 3.如权利要求1所述一种用于高速获取TCP连接数据的方法,其特征在于:所述D步骤中保存的TCP连接信息包括连接状态和TCP数据在报文中的偏移。 3. A method as claimed in claim 1 said high speed data acquisition for a TCP connection, characterized in that: in step D saved in the TCP connection and connection status information includes an offset in the TCP data packets.
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