CN101827020B - Method and system for speeding up built persistent connection without disconnection - Google Patents

Method and system for speeding up built persistent connection without disconnection Download PDF

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CN101827020B
CN101827020B CN 201010118353 CN201010118353A CN101827020B CN 101827020 B CN101827020 B CN 101827020B CN 201010118353 CN201010118353 CN 201010118353 CN 201010118353 A CN201010118353 A CN 201010118353A CN 101827020 B CN101827020 B CN 101827020B
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wan optimization
server
client
packet
response
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CN 201010118353
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CN101827020A (en
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范炉林
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深圳市深信服电子科技有限公司
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Abstract

本发明适用于网络技术领域,提供了一种对已经建立的长连接不断开进行加速的方法及系统,所述方法包括下述步骤:客户端发送数据包至服务器端;服务器端发送应答至客户端;当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,并根据该序列号创建会话建立TCP连接;当连接创建好之后,客户端再向服务器端发送数据包;第一广域网优化设备发送应答至客户端;第一广域网优化设备优化处理数据包并发送其至第二广域网优化设备;第二广域网优化设备接收并转发数据包至服务器端。 The present invention is applicable to network technologies, there is provided a method of continuous long open connection has been established and the acceleration system, the method comprising the steps of: the client sends a packet to the server; server sends a response to the client end; when a first WAN optimization appliance and a second WAN optimization appliance track to the client and the server are sent a packet, detecting the sequence number of packets both transmitted and creates a session to establish a TCP connection according to the serial number; when the connection is created, the client server again sends a data packet; a first WAN optimization device sends an acknowledgment to the client; a first WAN optimization optimization processing packet and sends it to the second WAN optimization appliance; a second WAN optimization device receives and forwards the packet to the server. 本发明可以在设备生效后,对之前已建立的连接同样做到网络优化处理,避免断开客户连接,方便客户使用。 After the device of the present invention may take effect on previously established connections do the same network optimization, customer connection prevented from being broken, to facilitate customers.

Description

—种对已经建立的长连接不断开进行加速的方法及系统 - the kind of long-established connections continue to develop a method and system for accelerated

技术领域 FIELD

[0001] 本发明属于网络技术领域,尤其涉及一种对已经建立的长连接不断开进行加速的方法及系统。 [0001] The present invention belongs to the field of network technologies, particularly to a long-established connection is not a method and system for acceleration.

背景技术 Background technique

[0002] 当前,采用广域网优化设备来提升网络效率的企业越来越多,广域网优化所采用的技术当中,很基础的一点就是协议优化技术,这时广域网优化设备相当于一个代理,把真正的客户端到服务端直接的连接给代理掉,这时在广域网上真正进行数据传输的就是两台广域网优化设备之间建立的所谓的“高速TCP”或其他类似的协议优化技术。 [0002] Currently, the use of more and more WAN optimization to improve network efficiency of the enterprise, the WAN optimization technology used among the very basic point is that protocol optimization techniques, then WAN optimization device is equivalent to a proxy, the real client to the server directly connected to the agent swap, then the so-called "high-speed TCP" or other similar agreement is established between the two WAN optimization device data transmission technology truly optimize the WAN.

[0003] 由于采用的是代理技术,所以都需要有标准的TCP三次握手过程来建立连接,因此只对客户端新建的连接生效。 [0003] As a result of agent technology, so we need to have a standard TCP three-way handshake to establish a connection, so only new connection to the client to take effect. 但是,在实际的应用中,像网上邻居、IBM Lotus Notes系统都是长连接的应用,因此一旦广域网优化设备暂时失效,那么这些连接就不再通过广域网设备进行连接,而是直接建立客户端和真正的服务器的连接,之后当广域网优化设备重新生效时,这些已建立的连接不再有TCP的三次握手过程,那么此时广域网优化设备对这些连接就无法生效,其它加速手段也无法用上。 However, in practical applications, such as My Network Places application, IBM Lotus Notes system is a long connection, so once the WAN optimization device temporarily fail, then the connection will no longer be connected via a wide area network equipment, but directly and build client the real connection to the server, and then when the WAN optimization equipment revalidated, these established connections no longer have the TCP three-way handshake, then the time WAN optimization equipment for these connections will not be effective, other means can not be accelerated to spend.

发明内容 SUMMARY

[0004] 本发明的目的在于提供一种对已经建立的长连接不断开进行加速的方法,旨在解决现有技术在客户端和服务器端建立长连接时,当广域网优化设备重新生效时,无法对已经建立的长连接生效的问题。 [0004] The present invention is to provide a connection has been established for a long continuous open method of acceleration, when the prior art to solve the long-established connection between the client and server side, when the WAN optimization equipment revalidated, not the problems that have long established connections in force.

[0005] 本发明是这样实现的,一种对已经建立的长连接不断开进行加速的方法,所述方法包括下述步骤: [0005] The present invention is implemented, a kind of long-established the connection is not accelerated, the method comprising the steps of:

[0006] 客户端发送数据包至服务器端; [0006] The client sends a packet to the server;

[0007] 服务器端接收到客户端发送的数据包后,发送应答ACK至客户端; After [0007] the server receives a data packet sent by the client, it transmits a response ACK to the client;

[0008] 当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; [0008] When the first WAN optimization appliance and a second WAN optimization appliance track to the client and the server are sent a packet, detecting the sequence number of packets both transmitted, a first WAN optimization appliance and a second WAN optimization according to this device creates a session serial number, TCP connection is established;

[0009] 当第一广域网优化设备和第二广域网优化设备之间的连接创建好之后,客户端再向服务器端发送数据包; [0009] When the first and second WAN optimization WAN optimization created connections between devices, client server again sends a data packet;

[0010] 第一广域网优化设备接收到客户端向服务器发送的数据包后,发送应答ACK至客户端; After the [0010] first WAN optimization device receives a packet sent by the client to the server, it transmits a response ACK to the client;

[0011] 第一广域网优化设备对客户端发送给服务器端的数据包进行优化处理,并发送优化处理后的数据包至第二广域网优化设备; [0011] a first WAN optimization device transmits the client to the server to optimize the data packet, and transmits the processed packet data optimized to the second WAN optimization appliance;

[0012] 第二广域网优化设备接收并转发客户端向服务器发送的数据包至服务器端; [0012] The second WAN optimization device receives and forwards the packet to the server sent by the client to the server;

[0013] 服务器端发送应答ACK至第二广域网优化设备。 [0013] The server sends a response ACK to the second WAN optimization.

[0014] 本发明的另一目的在于提供一种对已经建立的长连接不断开进行加速的系统,所述系统包括客户端、与所述客户端通过网络连接的第一广域网优化设备、与所述第一广域网优化设备通过网络连接的第二广域网优化设备和与所述第二广域网优化设备通过网络连接的服务器端,所述客户端包括: [0014] Another object of the present invention is to provide a long-established connection continues to accelerate the opening of the system, said system comprising a first wide area network client, and the client device connected via a network optimization, and the said first WAN optimization appliance via a second WAN optimization appliance network connection with the second WAN optimization server device connected through a network, said client comprising:

[0015] 第一数据包发送单元,用于向服务器端发送数据包; [0015] the first data packet sending unit, configured to send a data packet to the server;

[0016] 第一应答接收单元,用于接收服务器端回应的应答ACK ; [0016] The first response receiving means for receiving the server response to the ACK response;

[0017] 第二数据包发送单元,用于当第一广域网优化设备和第二广域网优化设备建立TCP连接后,再次向服务器端发送数据包; [0017] the second data packet sending unit, configured to, when the first and second WAN optimization appliance WAN optimization device establishes the TCP connection, again sends packets to the server;

[0018] 第二应答接收单元,用于接收第一广域网优化设备发送的应答ACK ; [0018] The second response receiving unit for receiving a first WAN optimization device transmits the acknowledgment ACK;

[0019] 所述服务器端包括: [0020] 第一数据包接收单元,用于接收客户端发送的数据包; [0019] The server comprises: [0020] the first data packet receiving unit, for receiving a data packet sent by a client;

[0021] 第一应答发送单元,用于向客户端发送应答ACK ; [0021] The first response sending unit, configured to send a response ACK to the client;

[0022] 第二数据包接收单元,用于接收第二广域网优化设备发送的优化处理后的数据包; [0022] a second data packet receiving unit configured to receive a second WAN optimization optimized packet transmission processing apparatus;

[0023] 第二应答发送单元,用于向第二广域网优化设备发送应答ACK ; [0023] The second response transmission unit for the second WAN optimization appliance transmitting the ACK response;

[0024] 所述第一广域网优化设备包括: [0024] The first WAN optimization apparatus comprising:

[0025] 连接建立单元,用于当跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; [0025] The connection establishing unit, configured to, when the track to both the client and the server sends a data packet, the packet sequence number to detect both the transmitted, a first WAN optimization appliance and a second WAN optimization apparatus according to the serial number create a session, to establish a TCP connection;

[0026] 应答发送单元,用于当接收到客户端向服务器端发送的数据包后,发送应答ACK至客户端; After the [0026] response sending unit, when receiving a data packet sent by the client to the server, it transmits a response ACK to the client;

[0027] 数据包优化发送单元,用于对客户端发送给服务器端的数据进行优化处理,并发送优化处理后的数据包;所述第二广域网优化设备包括: [0027] Optimization of packet data transmission unit for transmitting to the client data server performs optimization processing, and transmits the processed data packet optimization; the second WAN optimization apparatus comprising:

[0028] 数据包接收发送单元,用于接收并转发所述数据包优化发送单元发送的优化处理后的数据包至服务器端。 [0028] Data packet transmission and reception unit for receiving the data packet and forwarding the data packet to the server to optimize the transmission unit transmits the optimization process.

[0029] 本发明的另一目的在于提供一种对已经建立的长连接不断开进行加速的方法,所述方法包括下述步骤: [0029] Another object of the present invention is to provide an established length of the connection is not accelerated, the method comprising the steps of:

[0030] 客户端向服务器端发送数据包; [0030] The client sends a packet to the server;

[0031] 接收服务器端回应的应答ACK,其中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; [0031] Receive server response answering the ACK, wherein, when the first WAN optimization appliance and a second WAN optimization appliance track to the client and the server are transmitted a data packet, the data packet to detect both the transmission sequence number, a first and a second WAN optimization appliance WAN optimization session created based on this sequence number, TCP connection is established;

[0032] 当第一广域网优化设备和第二广域网优化设备建立TCP连接后,客户端再次向服务器端发送数据包; [0032] When the first and second WAN optimization appliance WAN optimization device establishes a TCP connection, the client once again sends packets to the server;

[0033] 客户端接收第一广域网优化设备发送的应答ACK。 [0033] The client receives a first WAN optimization device transmits the acknowledgment ACK.

[0034] 本发明的另一目的在于提供一种客户端,所述客户端包括: [0034] Another object of the present invention is to provide a client, said client comprising:

[0035] 第一数据包发送单元,用于向服务器端发送数据包; [0035] The first packet transmitting means for transmitting data packets to the server;

[0036] 第一应答接收单元,用于接收服务器端回应的应答ACK,其中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接;[0037] 第二数据包发送单元,用于当第一广域网优化设备和第二广域网优化设备建立TCP连接后,再次向服务器端发送数据包; [0036] The first response receiving means for receiving the server's response to the ACK response, wherein when the first and second WAN optimization appliance WAN optimization to track both the client and the server sends a data packet, to detect both transmitting the data packet sequence number, a first WAN optimization appliance and a second WAN optimization session created based on this sequence number, TCP connection is established; [0037] a second data packet sending unit, configured to, when the first and second WAN optimization appliances two WAN optimization device after establishing a TCP connection, again sends packets to the server;

[0038] 第二应答接收单元,用于接收第一广域网优化设备发送的应答ACK。 [0038] The second response receiving unit for receiving a first WAN optimization device transmits the acknowledgment ACK.

[0039] 本发明的另一目的在于提供一种对已经建立的长连接不断开进行加速的方法,所述方法包括下述步骤: [0039] Another object of the present invention is to provide an established length of the connection is not accelerated, the method comprising the steps of:

[0040] 服务器端接收客户端发送的数据包; [0040] The server receives the data packet sent by a client;

[0041] 向客户端发送应答ACK,其中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; [0042] 服务器端接收第二广域网优化设备发送的优化处理后的数据包; [0041] The terminal sends a response ACK to the client, wherein, when the first WAN optimization appliance and a second WAN optimization appliance track to the client and the server are sent a packet, detecting the sequence number of packets both transmitted, the and a second WAN optimization WAN optimization session created based on this sequence number, TCP connection is established; [0042] second server receives WAN optimization optimized packet transmission processing apparatus;

[0043] 服务器端向第二广域网优化设备发送应答ACK。 [0043] server to the second WAN optimization device transmits a response ACK.

[0044] 本发明的另一目的在于提供一种服务器端,所述服务器端包括: [0044] Another object of the present invention is to provide a server, the server comprising:

[0045] 第一数据包接收单元,用于接收客户端发送的数据包; [0045] The first data packet receiving unit for receiving a data packet sent by a client;

[0046] 第一应答发送单元,用于向客户端发送应答ACK,其中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; [0046] The first response sending unit, configured to send a response ACK to the client, wherein, when the first and second WAN optimization appliance WAN optimization to track both the client and the server sends a data packet, both the transmission probe packet sequence number, a first WAN optimization appliance and a second WAN optimization session created based on this sequence number, TCP connection is established;

[0047] 第二数据包接收单元,用于接收第二广域网优化设备发送的优化处理后的数据包; [0047] a second data packet receiving unit configured to receive a second WAN optimization optimized packet transmission processing apparatus;

[0048] 第二应答发送单元,用于向第二广域网优化设备发送应答ACK。 [0048] The second response transmitting means for optimizing the wide area network to a second device transmits a response ACK.

[0049] 在本发明中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,并根据该序列号创建会话,建立TCP连接,当接收到客户端再次向服务器端发送的数据包后,发送应答ACK至客户端,然后对接收到的数据包进行优化处理,并发送优化处理后的数据包至第二广域网优化设备,第二广域网优化设备接收并转发客户端向服务器发送的数据包至服务器端,服务器端发送应答ACK至第二广域网优化设备,这样,在第一广域网优化设备和第二广域网优化设备生效时,检测客户端和服务器端连接的序列号,然后在第一广域网优化设备和第二广域网优化设备上通过该序列号创建TCP连接,可以满足设备在上架或生效后,对之前已建立的连接同样做到网络优化处理,避免断开客户连接,方便客 [0049] In the present invention, when a first WAN optimization appliance and a second WAN optimization appliance track to the client and the server are sent a packet, detecting the sequence number of packets both transmitted, and based on the sequence number create a session to establish a TCP connection, after receiving a data packet sent by the client to the server again, the client transmits a response to the ACK, and then docking the received packet to optimize, optimization and transmits the processed data packet to the second two WAN optimization, the second WAN optimization device receives and forwards the packet to the server sent by the client to the server, the server sends a response ACK to the second WAN optimization appliance, so that in a first WAN optimization appliance and a second WAN optimization when the device is active, the sequence number to detect the client and server side of the connection, and then in the first WAN optimization device and a second WAN optimization device on a TCP connection created by the serial number, or shelves to meet the device after the entry into force of the previously established the connection to do the same network optimization process to avoid disconnecting customers to connect, easy-off 户使用。 Household use.

附图说明 BRIEF DESCRIPTION

[0050] 图I是本发明实施例提供的广域网优化设备失效后,客户端和服务器端的TCP连接的三次握手过程的示意图; [0050] FIG. I is a schematic diagram of the three-way handshake WAN an embodiment of the present invention optimizes equipment failure, the client and server TCP connection;

[0051] 图2是本发明实施例提供的广域网优化设备生效后,客户端和服务器端的通过广域网优化设备对已经建立的长连接不断开进行加速的方法的流程图; [0051] FIG. 2 is provided in the embodiment WAN optimization to take effect, the client and server over the WAN apparatus flowchart of a method of long-established connection is not optimized to accelerate the present invention;

[0052] 图3为本发明实施例提供的客户端的结构框图; [0052] FIG. 3 provides a block diagram of the embodiment of the present invention, a client;

[0053] 图4为本发明实施例提供的服务器端的结构框图; [0053] FIG. 4 is a block diagram of the server according to an embodiment of the present invention;

[0054] 图5为本发明实施例提供的广域网优化设备的结构框图; [0054] FIG. 5 a block diagram of WAN optimization apparatus according to an embodiment of the present invention;

[0055] 图6为本发明实施例提供的对已经建立的长连接不断开进行加速的系统的结构示意图。 [0055] FIG. 6 is a schematic structural diagram of the already established connection is not long acceleration of a system according to an embodiment of the present invention.

具体实施方式 Detailed ways

[0056] 为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。 [0056] To make the objectives, technical solutions and advantages of the present invention will become more apparent hereinafter in conjunction with the accompanying drawings and embodiments of the present invention will be further described in detail. 应当理解,此处所描述的具体实施例仅用以解释本发明,并不用于限定本发明。 It should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0057] 在本发明实施例中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,并根据该序列号创建会话,建立TCP连接,当接收到客户端再次向服务器端发送的数据包后,发送应答ACK至客户端,然后对接收到的数据包进行优化处理,并发送优化处理后的数据包至第二广域网优化设备,第二广域网优化设备接收并转发客户端向服务器发送的数据包至服务器端,月艮务器端发送应答ACK至第二广域网优化设备,这样,在第一广域网优化设备和第二广域网优化设备生效时,检测客户端和服务器端连接的序列号,然后在第一广域网优化设备和第二广域网优化设备上通过该序列号创建TCP连接,可以满足设备在上架或生效后,对之前·已建立的连接同样做到网络优化处理,避免断开客户连 [0057] In the embodiment of the present invention, when the first WAN optimization appliance and a second WAN optimization appliance track to the client and the server are sent a packet, detecting the sequence number of packets both transmitted, and based on the create a session sequence number, TCP connection after receiving the packet sent from the client to the server again, the client transmits a response to the ACK, and then docking the received packet optimization process, and transmits the processed data packet optimization to a second WAN optimization appliance, a second WAN optimization device receives and forwards the packet to the server sent by the client to the server, on that works to end transmits a response ACK to the second WAN optimization appliance, so that the optimization apparatus of the first wide area network when the second WAN optimization and active, the sequence number detecting client and server end of the connection, and then a first and a second WAN optimization appliance WAN optimization TCP connection created by the serial number of the device, the device can satisfy the shelves or take effect , prior to connection-established network optimization process to do the same, even customers avoid disconnection ,方便客户使用。 , To facilitate customers.

[0058] 图I是本发明实施例提供的广域网优化设备失效后,客户端和服务器端的TCP连接的三次握手过程的示意图,详述如下: [0058] FIG. I is a schematic diagram of the three-way handshake WAN an embodiment of the present invention optimizes equipment failure, the client and server TCP connection, as detailed below:

[0059] 在本发明实施例中,当广域网优化设备失效后,客户端I和服务器端2越过广域网优化设备直接建立TCP连接,具体的TCP连接的三次握手过程是:在握手过程中客户端I和服务器端2双方协商好各自的序列号(seq)后,以此序列号为基础,发送方每发送一个字节序列号就往上加1,接收方每收到I个字节,那么应答ACK的序列号也随之加1,以此来保证数据的可靠性。 [0059] In the embodiment of the present invention, when the WAN optimization equipment failure, the client terminal I and the server 2 over the WAN optimization directly establishes a TCP connection, a specific three-way handshake TCP connection is: during the handshake client I and the server 2 after the two sides negotiated their sequence number (seq), this is based on the serial number, the sender sends each byte serial number add up to 1, each recipient receives an I-byte, then the answer ACK sequence number will be incremented by one, in order to ensure the reliability of data.

[0060] 图2是本发明实施例提供的广域网优化设备生效后,客户端和服务器端的通过广域网优化设备对已经建立的长连接不断开进行加速的方法的流程图,详述如下: [0060] FIG. 2 is an embodiment of the present invention provides WAN optimization to take effect, the client and server over the WAN devices flowchart long established connection is not accelerated optimization method, described in detail as follows:

[0061] 在步骤I中,客户端传输数据包至服务器端。 [0061] In step I, the client transport packet to the server.

[0062] 作为本发明的一个实施例,假设此时客户端传输了I个字节的数据包到服务器端(数据的传输方向和字节数均不做要求,此处假设仅为描述方便),该数据包的数据序列号为m,应答ACK序列号为η。 [0062] As one embodiment of the present invention, assuming that the client packet I transmitted bytes of data to the server (the transport direction and the number of bytes of data do not required, assumed here merely for convenience of description) , the sequence number of the data packet is m, the response ACK sequence number is η.

[0063] 在步骤2中,服务器端接收到客户端发送的数据包后,回应一个应答ACK至客户端。 After [0063] In step 2, the server receives a data packet sent by the client, a response acknowledge ACK to the client.

[0064] 作为本发明的一个实施例,服务器端回应客户端一个ACK,根据TCP协议,该ACK的序列号为m+1。 [0064] As one embodiment of the present invention, a client server replies ACK, according to the TCP protocol, the ACK sequence number is m + 1.

[0065] 在步骤3中,当广域网优化设备I和广域网优化设备2跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,并根据该序列号创建会话,建立TCP连接。 After [0065] In Step 3, when the WAN optimization I and WAN optimization 2 track to the client and the server are sent a packet, detecting the sequence number of packets both transmitted, and creates a session based on the sequence number to establish a TCP connection.

[0066] 作为本发明的一个实施例,当广域网优化设备I和广域网优化设备2跟踪到通过TCP连接的客户端和服务器端均发送了一个数据包后,就可以把连接双方的序列号正确的探测出来,此时在广域网优化设备I上创建一个起始序列号为Π,对端起始序列号为m+1的一个TCP连接,并强制设置该连接的状态为ESTABLISHED,同时发送消息通知广域网优化设备2创建一个起始序列号为m+1,对端起始序列号为η的TCP连接,同样设置该连接的状态为ESTABLISHED,如果在创建过程中,该连接继续在发送数据,可以简单的丢弃,因为客户端到服务器端的TCP连接能够保证该数据包会重传。 After [0066] As the present embodiment of the invention, when the WAN optimization I and WAN optimization 2 track to the client and the server through the TCP connection units send a packet, it can be connected to the serial number of both right detecting out, this time to create a start sequence number in the WAN optimization device [pi I is, for the end of the start sequence number m + a TCP 1 is connected, and the connection state of forcibly set to ESTABLISHED, at the same time send a message notifying the WAN optimizing apparatus 2 creates a start sequence number m + 1, the end of the start sequence number is η TCP connection, the connection status is also provided to ESTABLISHED, if the creation process, data transmission continues in this connection may be simply It discarded, because the TCP connection client server to ensure that the packet will be retransmitted.

[0067] 在步骤4中,当广域网优化设备I和广域网优化设备2之间的连接创建好之后,客户端再向服务器端发送数据,该数据的序列号seq为m+1,应答ACK的ack序号为η。 [0067] In step 4, when the WAN optimization I and WAN optimization connection between the devices is created, the client again server sends the data, the sequence number seq of the data is m + 1, the response ack ACK of serial number η.

[0068] 作为本发明的一个实施例,当广域网优化设备I和广域网优化设备2之间的连接创建好之后,假设客户端再向服务器端发送一个字节的数据(同样,数据传输方向和字节数在此仅为描述方便),这时广域网优化设备I上的在步骤3中创建的TCP连接就可以作为代理服务器从而代理回应ACK至客户端。 [0068] As one embodiment of the present invention, when the I and WAN optimization WAN optimization after the connection is created between the two, again assuming the client server sends a byte of data (the same data transmission direction and the word the number of sections in this description for convenience only), then the WAN optimization TCP connection on the device in step I 3 can be created as a proxy server so the proxy ACK response to the client.

[0069] 在步骤5中,广域网优化设备I发送应答ACK至客户端,该ACK的序列号ack为m+2。 [0069] In step 5, the WAN optimization device I transmits acknowledgment ACK to the client, the ACK sequence number ack to m + 2.

[0070] 在步骤6中,广域网优化设备I对客户端发送给服务器端的数据进行优化处理,并发送优化处理后的数据至广域网优化设备2。 [0070] In step 6, WAN optimization to the data I the server to the client to optimize transmission, and transmits the processed data to optimize WAN optimization 2.

[0071] 在步骤7中,广域网优化设备2客户端发送的序列号为m+1的数据包发往服务器端。 [0071] In step 7, SEQ ID NO WAN optimization client device 2 transmits the packet m + 1 is sent to the server.

[0072] 在步骤8中,服务器端发送应答ACK,该ACK的序列号ack为m+2。 [0072] In step 8, the server sends a response ACK, ACK sequence number of the ack to m + 2.

[0073] 作为本发明的一个实施例,服务器端发送应答ACK,该ACK的序列号ack为m+2,然后该ACK由广域网优化设备2代理客户端处理。 [0073] As one embodiment of the present invention, the server sends a response ACK, ACK sequence number of the ack is m + 2, then the ACK 2 by the WAN optimization proxy client device processing.

[0074] 在本发明实施例中,由于需要自行控制TCP,强制设置序列号和状态,因此需要对TCP协议栈进行修改,但不仅限于此方式,其它方式能够达到该需求即可。 [0074] In an embodiment of the present invention, due to the need to control their own TCP, sequence numbers and forcibly set state, it is necessary to modify the TCP protocol stack, but is not limited to this embodiment, other ways to achieve this need can be.

[0075] 图3为本发明实施例提供的客户端的结构框图,为了便于说明,仅示出了本发明实施例相关的部分。 [0075] FIG. 3 is a block diagram of a client according to an embodiment of the present invention, for convenience of illustration, only a portion related to the present invention embodiment. 该客户端包括:第一数据包发送单元31、第一应答接收单元32、第二数据包发送单元33和第二应答接收单元34。 The client includes: a first data packet transmission unit 31, a first response receiving unit 32, a second data packet transmission unit 33 and a second response receiving unit 34.

[0076] 其中,第一数据包发送单元31向服务器端发送数据包; [0076] wherein, a first packet transmission unit 31 transmits the packet to the server;

[0077] 第一应答接收单元32接收服务器端回应的应答ACK ; [0077] The first response receiving unit 32 receives the server replies the ACK response;

[0078] 当第一广域网优化设备和第二广域网优化设备建立TCP连接后,第二数据包发送单元33向服务器端发送数据包; [0078] When the first and second WAN optimization appliance WAN optimization TCP connection is established, the second packet transmitting unit 33 transmits a data packet to the server;

[0079] 第二应答接收单元34接收第一广域网优化设备发送的应答ACK。 [0079] The second response receiving unit 34 receives a first WAN optimization device transmits the acknowledgment ACK. 具体情况如上所述,在此不再赘述。 Specifically As described above, are not repeated here.

[0080] 图4为本发明实施例提供的服务器端的结构框图,为了便于说明,仅示出了本发明实施例相关的部分。 [0080] FIG. 4 is a block diagram of the server according to an embodiment of the present invention, for convenience of illustration, only a portion related to the present invention embodiment. 该服务器端包括:第一数据包接收单元41、第一应答发送单元42、第二数据包接收单元43和第二应答发送单元44。 The server includes: a first data packet receiving unit 41, a first response transmission unit 42, a second data packet receiving unit 43 and the second response transmission unit 44.

[0081] 其中,第一数据包接收单元41接收客户端发送的数据包; [0081] wherein the first packet receiving unit 41 receives a data packet sent by a client;

[0082] 第一应答发送单元42向客户端发送应答ACK ; [0082] a first transmitting unit 42 transmits a response acknowledgment ACK to the client;

[0083] 第二数据包接收单元43接收第二广域网优化设备发送的优化处理后的数据包; [0083] a second data packet receiving unit 43 receives the second WAN optimization optimized packet transmission processing apparatus;

[0084] 第二应答发送单元44向第二广域网优化设备发送应答ACK。 [0084] The second response transmission unit 44 to the second WAN optimization device transmits a response ACK. 具体情况如上所述,在此不再赘述。 Specifically As described above, are not repeated here.

[0085] 图5为本发明实施例提供的广域网优化设备的结构框图,为了便于说明,仅示出了本发明实施例相关的部分。 [0085] FIG. 5 a block diagram of WAN optimization apparatus according to an embodiment of the present invention, for convenience of illustration, only a portion related to the present invention embodiment. 该广域网优化设备包括:连接建立单元51、应答发送单元52、数据包优化发送单元53和/或数据包接收发送单元54。 The WAN optimization apparatus comprising: a connection establishment unit 51, the response sending unit 52, a packet transmission optimization unit 53 receives the transmission unit 54 and / or data packets.

[0086] 连接建立单元51用于当跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,并根据该序列号创建会话,建立TCP连接; [0086] SEQ ID NO connection establishment unit 51 for the data packet to the client and when the tracking server are transmitted a data packet, to detect both the transmitted and creates a session based on the sequence number, TCP connection is established;

[0087] 应答发送单元52用于当接收到客户端向服务器端发送的数据包后,发送应答ACK至客户端; [0087] When the response sending unit 52 for receiving a data packet sent by the client to the server, the client sends a response to the ACK;

[0088] 数据包优化发送单元53用于对客户端发送给服务器端的数据进行优化处理,并发送优化处理后的数据包; [0088] Optimization of packet data transmission unit 53 for transmission to the client data server performs optimization processing, and transmits the processed data packet optimization;

[0089] 数据包接收发送单元54接收并转发所述数据包优化发送单元发送的优化处理后的数据包至服务器端。 [0089] The packet receiving unit 54 receives the transmission and forwards the data packet to the server to optimize the data packet transmitting unit transmits the optimized process. 具体情况如上所述,在此不再赘述。 Specifically As described above, are not repeated here.

[0090] 图6为本发明实施例提供的对已经建立的长连接不断开进行加速的系统的结构示意图,为了便于说明,仅示出了本发明实施例相关的部分。 [0090] FIG. 6 is a schematic structural diagram of the already established connection is not long acceleration of a system according to an embodiment of the present invention, for convenience of illustration, only a portion related to the present invention embodiment. 该对已经建立的长连接不断开·进行加速的系统包括:客户端61、第一广域网优化设备62、第二广域网优化设备63和服务器端64。 The already established connection is not a long-acceleration system comprises: a client 61, a first WAN optimization device 62, the second WAN optimization apparatus 63 and the server 64. 具体的系统中的设备之间的通信过程如上所述,在此不再赘述。 Specific communication process between the devices in the system described above, are not repeated here.

[0091] 在本发明实施例中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,并根据该序列号创建会话,建立TCP连接,当接收到客户端再次向服务器端发送的数据包后,发送应答ACK至客户端,然后对接收到的数据包进行优化处理,并发送优化处理后的数据包至第二广域网优化设备,第二广域网优化设备接收并转发客户端向服务器发送的数据包至服务器端,月艮务器端发送应答ACK至第二广域网优化设备,这样,在第一广域网优化设备和第二广域网优化设备生效时,检测客户端和服务器端连接的序列号,然后在第一广域网优化设备和第二广域网优化设备上通过该序列号创建TCP连接,可以满足设备在上架或生效后,对之前已建立的连接同样做到网络优化处理,避免断开客户连接 [0091] In the embodiment of the present invention, when the first WAN optimization appliance and a second WAN optimization appliance track to the client and the server are sent a packet, detecting the sequence number of packets both transmitted, and based on the create a session sequence number, TCP connection after receiving the packet sent from the client to the server again, the client transmits a response to the ACK, and then docking the received packet optimization process, and transmits the processed data packet optimization to a second WAN optimization appliance, a second WAN optimization device receives and forwards the packet to the server sent by the client to the server, on that works to end transmits a response ACK to the second WAN optimization appliance, so that the optimization apparatus of the first wide area network when the second WAN optimization and active, the sequence number detecting client and server end of the connection, and then a first and a second WAN optimization appliance WAN optimization TCP connection created by the serial number of the device, the device can satisfy the shelves or take effect , before the connection has been established to do the same network optimization, client connections to avoid disconnection ,方便客户使用。 , To facilitate customers.

[0092] 以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。 [0092] The foregoing is only preferred embodiments of the present invention but are not intended to limit the present invention, any modifications within the spirit and principle of the present invention, equivalent substitutions and improvements should be included in the present within the scope of the invention.

Claims (8)

1. 一种对已经建立的长连接不断开进行加速的方法,其特征在于,所述方法包括下述步骤: 客户端发送数据包至服务器端; 服务器端接收到客户端发送的数据包后,发送应答ACK至客户端; 当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; 当第一广域网优化设备和第二广域网优化设备之间的连接创建好之后,客户端再向服务器端发送数据包; 第一广域网优化设备接收到客户端向服务器发送的数据包后,发送应答ACK至客户端; 第一广域网优化设备对客户端发送给服务器端的数据包进行优化处理,并发送优化处理后的数据包至第二广域网优化设备; 第二广域网优化设备接收并转发客户端向服 1. A long-established connection is not accelerated method, wherein the method comprises the steps of: the client sends a packet to the server; the data packet sent by the client receives the server, transmits a response ACK to the client; after when a first WAN optimization appliance and a second WAN optimization appliance track to the client and the server are sent a packet, detecting the sequence number of packets both transmitted, a first WAN optimization appliance and a second WAN optimization session created based on this sequence number, TCP connection is established; after a first and a second WAN optimization appliance WAN optimization created connections between the devices, the client server again sends packets; a first WAN optimization after the data packet device receives the client sends to the server, transmits a response ACK to the client; a first WAN optimization packets sent to the client to the server to optimize, and transmits optimize data packet processed to the second WAN optimization equipment; second WAN optimization device to receive and forward the client to the service 器发送的数据包至服务器端; 服务器端发送应答ACK至第二广域网优化设备。 Packet to the server sent by the terminal; server sends a response ACK to the second WAN optimization.
2. —种对已经建立的长连接不断开进行加速的系统,所述系统包括客户端、与所述客户端通过网络连接的第一广域网优化设备、与所述第一广域网优化设备通过网络连接的第二广域网优化设备和与所述第二广域网优化设备通过网络连接的服务器端,其特征在于,所述客户端包括: 第一数据包发送单元,用于向服务器端发送数据包; 第一应答接收单元,用于接收服务器端回应的应答ACK ; 第二数据包发送单元,用于当第一广域网优化设备和第二广域网优化设备建立TCP连接后,再次向服务器端发送数据包; 第二应答接收单元,用于接收第一广域网优化设备发送的应答ACK ; 所述服务器端包括: 第一数据包接收单元,用于接收客户端发送的数据包; 第一应答发送单元,用于向客户端发送应答ACK ; 第二数据包接收单元,用于接收第二广域网优化设备发 2. - species already established connection is not longer accelerating system, the system comprising a client, a first WAN optimization appliance and the client connected via a network, devices connected via a network to optimize the first wide area network a second WAN optimization apparatus and a second WAN optimization server device connected through a network, wherein said client comprises: a first data packet sending unit, configured to send a data packet to the server; first response receiving means for receiving the server response to the ACK response; second packet transmission means for, when the first and second WAN optimization appliance WAN optimization device establishes the TCP connection, again sends packets to the server; a second response receiving means for receiving a first WAN optimization device transmits acknowledgment ACK; and the server comprising: a first data packet receiving unit, for receiving a data packet sent by a client; a first response sending unit, configured to the client sends the ACK response; second packet receiving unit configured to receive a second WAN optimization appliances hair 的优化处理后的数据包; 第二应答发送单元,用于向第二广域网优化设备发送应答ACK ; 所述第一广域网优化设备包括: 连接建立单元,用于当跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; 应答发送单元,用于当接收到客户端向服务器端发送的数据包后,发送应答ACK至客户端; 数据包优化发送单元,用于对客户端发送给服务器端的数据进行优化处理,并发送优化处理后的数据包; 所述第二广域网优化设备包括: 数据包接收发送单元,用于接收并转发所述数据包优化发送单元发送的优化处理后的数据包至服务器端。 Optimization of packet processed; second response sending unit, configured to send a second WAN optimization appliance the ACK response; said first WAN optimization apparatus comprising: a connection establishment unit configured to track both the client and server after transmitting a packet, a packet sequence number to detect both the transmitted, a first WAN optimization appliance and a second WAN optimization apparatus according to the sequence number of the created session to establish a TCP connection; response sending unit, when receiving the client after the data packet sent to the server, transmits a response ACK to the client; optimize packet transmission unit configured to transmit the data to the client to the server performs optimization processing, and transmits the processed data packet optimization; the second wide area network optimization apparatus comprising: a data packet transmission and reception unit for receiving the data packet and forwarding the data packet to the server to optimize the transmission unit transmits the optimization process.
3. —种对已经建立的长连接不断开进行加速的方法,其特征在于,所述方法包括下述步骤: 客户端向服务器端发送数据包; 接收服务器端回应的应答ACK ; 当第一广域网优化设备和第二广域网优化设备建立TCP连接后,客户端再次向服务器端发送数据包,其中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; 客户端接收第一广域网优化设备发送的应答ACK。 3. - species already established connection is not longer accelerated method, wherein the method comprises the steps of: the client sends a packet to the server; receiving the server response to the ACK response; when the first wide area network after optimization apparatus and a second WAN optimization appliance establishing a TCP connection, the client once again sends packets to the server, wherein, when a first WAN optimization appliance and a second WAN optimization appliance track to the client and the server are sent a packet after the detection of the serial number of the packets sent by both, a first and a second WAN optimization appliance WAN optimization session is created based on this sequence number, TCP connection is established; client receiving a first WAN optimization device transmits the acknowledgment ACK.
4. 一种客户端,其特征在于,所述客户端包括: 第一数据包发送单元,用于向服务器端发送数据包; 第一应答接收单元,用于接收服务器端回应的应答ACK ; 第二数据包发送单元,用于当第一广域网优化设备和第二广域网优化设备建立TCP连接后,再次向服务器端发送数据包,其中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; 第二应答接收单元,用于接收第一广域网优化设备发送的应答ACK。 A client, wherein the client comprises: a first packet transmission means for transmitting data packets to the server; a first response receiving means for receiving the server response to the ACK response; first second data packet transmission unit configured to, when the first and second WAN optimization appliance WAN optimization device establishes the TCP connection, resending the data packet to the server, wherein, when the first and second WAN optimization appliance WAN optimization to the customer tracking after both the server and the terminal transmits a packet, the packet sequence number to detect both the transmitted, a first WAN optimization appliance and a second WAN optimization session created based on this sequence number, TCP connection is established; a second response receiving unit, means for receiving a first WAN optimization device transmits the acknowledgment ACK.
5. 一种对已经建立的长连接不断开进行加速的方法,其特征在于,所述方法包括下述步骤: 服务器端接收客户端发送的数据包; 向客户端发送应答ACK,其中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; 服务器端接收第二广域网优化设备发送的优化处理后的数据包; 服务器端向第二广域网优化设备发送应答ACK。 A length of the already established connection is not accelerated method, wherein the method comprises the steps of: the server receives the data packet sent by a client; sends a response ACK to the client, wherein, when the first after a WAN optimization apparatus and a second WAN optimization appliance track to the client and the server are sent a packet, detecting the sequence number of packets both transmitted, a first WAN optimization appliance and a second WAN optimization appliance according to the serial number create a session to establish a TCP connection; server receives the second WAN optimization optimized packet transmission processing apparatus; optimization server apparatus transmits a response ACK to the second WAN.
6. 一种服务器端,其特征在于,所述服务器端包括: 第一数据包接收单元,用于接收客户端发送的数据包; 第一应答发送单元,用于向客户端发送应答ACK,其中,当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接; 第二数据包接收单元,用于接收第二广域网优化设备发送的优化处理后的数据包; 第二应答发送单元,用于向第二广域网优化设备发送应答ACK。 A server, wherein the server comprises: a first data packet receiving unit, for receiving a data packet sent by a client; a first response sending unit, configured to send a response ACK to the client, wherein when the first WAN optimization appliance and a second WAN optimization appliance track to the client and the server are sent a packet, detecting the sequence number of packets both transmitted, a first WAN optimization appliance and a second WAN optimization appliance according to the created session sequence number, TCP connection is established; a second data packet receiving unit, for receiving a second WAN optimization optimized packet transmission processing apparatus; a second response transmission means for optimizing a second device sends an acknowledgment to the wide area network ACK.
7. —种对已经建立的长连接不断开进行加速的方法,其特征在于,所述方法包括下述步骤: 当第一广域网优化设备和第二广域网优化设备跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,第一广域网优化设备和第二广域网优化设备根据该序列号创建会话,建立TCP连接;当第一广域网优化设备接收到客户端向服务器端发送的数据包后,发送应答ACK至客户端; 第一广域网优化设备对客户端发送给服务器端的数据进行优化处理,并发送优化处理后的数据包至第二广域网优化设备; 第二广域网优化设备接收并转发所述优化处理后的数据包至服务器端。 7. - kind of long-established connection continues to accelerate the opening, characterized in that, said method comprising the steps of: when all the first transmitting apparatus and a second WAN optimization WAN optimization and to the client tracking server a post-packet, detecting the sequence number of packets both transmitted, a first WAN optimization appliance and a second WAN optimization appliance according to create a session to the serial number, to establish a TCP connection; when a first WAN optimization device receives the client to the server after the data packet sent by the server, transmits a response ACK to the client; a first WAN optimization device transmits to the data server to optimize the client, and transmits the optimized data packet is processed to a second WAN optimization appliance; a second WAN optimization device receives and forwards the packet to the server after the optimization process.
8. 一种第一广域网优化设备,其特征在于,所述第一广域网优化设备包括: 连接建立单元,用于当跟踪到客户端和服务器端均发送了一个数据包后,探测双方发送的数据包的序列号,和第二广域网优化设备根据该序列号创建会话,建立TCP连接;应答发送单元,用于当接收到客户端向服务器端发送的数据包后,发送应答ACK至客户端; 数据包优化发送单元,用于对客户端发送给服务器端的数据进行优化处理,并发送优化处理后的数据包至所述第二广域网优化设备,所述第二广域网优化设备的数据包接收发送单元接收并转发所述优化处理后的数据包至服务器端。 A first WAN optimization appliance, characterized in that said first WAN optimization apparatus comprising: a data connection establishment unit configured to track both the client and the server sends a data packet, both the transmission of the probe packet sequence number, and a second WAN optimization created based on the serial number of the session, establishes the TCP connection; response transmitter unit, after receiving a data packet sent by the client to the server, transmits a response ACK to the client; data optimize packet transmission unit for transmitting to the client data server to optimize, optimization and transmits the processed data packet to the second WAN optimization, the optimization apparatus of the second data packet transmission and reception unit receives the wide area network and forwarding the data packet to the server to optimize the process.
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