WO2017063400A1 - 一种基于业务链信息的报文选路方法及装置 - Google Patents
一种基于业务链信息的报文选路方法及装置 Download PDFInfo
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- H—ELECTRICITY
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- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/567—Integrating service provisioning from a plurality of service providers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- This paper relates to but not limited to the field of communication technology, and relates to a message routing method and device based on service chain information.
- the embodiment of the invention provides a message routing method and device based on service chain information, which solves the problem that the service chain information is encapsulated in the extended option of the IP packet, so that each field is separately encoded, resulting in an increase of redundant fields.
- the problem is a message routing method and device based on service chain information, which solves the problem that the service chain information is encapsulated in the extended option of the IP packet, so that each field is separately encoded, resulting in an increase of redundant fields.
- An embodiment of the present invention provides a packet routing method based on service chain information, including:
- the service function proxy module obtains a service chain table including the service chain information, the service function proxy module address, and the value-added server address information from the service instance maintenance module;
- the service function proxy module receives the packet including the service chain information sent by the service control network element module;
- the service function proxy module sends the packet to the corresponding value-added server for processing according to the service chain information of the packet and the corresponding service chain information in the obtained service chain table, and processes the report returned via the value-added server.
- the message is processed in the next hop.
- the service function proxy module obtains, from the service instance maintenance module, a service link table that includes service chain information, a service function proxy module address, and a value-added server address information, including:
- the service function proxy module acquires the service chain information, the service function proxy module address, and the value-added server address information by using the transmission control protocol TCP/Internet Protocol IP link established by the service instance maintenance module and the service function proxy module.
- Business linked list
- the method further includes: before the service function proxy module receives the packet including the service chain information sent by the service control network element module,
- the service control network element module searches for the corresponding service chain identifier according to the packet characteristics of the packet sent by the user, and obtains corresponding service chain information according to the service chain identifier;
- the service control network element module searches for a corresponding service link table according to the service chain information, and obtains a service function proxy module address by using the found service link table;
- the service control network element module encapsulates the obtained service chain information into a packet carrying the original user message to be forwarded, and encapsulates the service chain information according to the acquired service function proxy module address.
- the text is sent to the business function proxy module.
- the service chain information includes a service path identifier and a service index.
- the method further includes: after the service function proxy module receives the packet that includes the service chain information sent by the service control network element module,
- the service function proxy module decodes the received packet encapsulated with service chain information, and obtains service chain information and a message;
- the service function proxy module creates a stream context index of the triplet for the obtained packet
- the triplet includes a user IP address, a port number, and a protocol number.
- the service function proxy module sends the packet to the corresponding value-added server according to the service chain information of the packet and the corresponding service chain information in the obtained service link table, including:
- the service function proxy module obtains a value-added server address by matching the service chain information of the packet with the service chain information in the obtained service chain table;
- the service function proxy module sends the message to the value-added server for processing according to the obtained value-added server address.
- the service function proxy module performs packet next hop processing on the packet returned by the value-added server processing, including:
- the service function proxy module receives the message returned by the value-added server processing, and searches for the service chain table in the created flow context index according to the triplet of the returned message;
- the service function proxy module obtains the address of the next hop service function proxy module by using the service link table
- the service function proxy module encapsulates the service chain information into the packet, and sends the packet encapsulated with the service chain information to the next hop service function proxy module according to the next hop service function proxy module address.
- An embodiment of the present invention further provides a message routing device based on service chain information, including:
- the obtaining module is configured to obtain, from the service instance maintenance module, a service chain table that includes service chain information, a service function proxy module address, and a value-added server address information, and a packet that includes the service chain information sent by the service control network element module;
- the message routing module is configured to send the packet to the corresponding value-added server for processing according to the service chain information of the packet and the corresponding service chain information in the obtained service chain table, and process the packet through the value-added server.
- the returned packet performs the next hop processing of the packet.
- the obtaining module includes:
- Obtaining a service link table unit configured to obtain, by using the service instance maintenance module, a transmission control protocol TCP/Internet Protocol IP link established by the service instance maintenance module, to obtain service chain information, a service function proxy module address, and a value-added server address information.
- Business chain table configured to obtain, by using the service instance maintenance module, a transmission control protocol TCP/Internet Protocol IP link established by the service instance maintenance module, to obtain service chain information, a service function proxy module address, and a value-added server address information.
- the message routing module includes:
- Obtaining a value-added server address unit configured to obtain a value-added server address by matching the service chain information of the packet with the service chain information in the obtained service chain table;
- a sending unit configured to send the message to the value-added server for processing according to the obtained value-added server address.
- the GRE Generic Routing Encapsulation
- the GRE Generic Routing Encapsulation
- the GRE Generic Routing Encapsulation
- the message sent to the value-added service is the original message, and the value-added service is provided. No change in message is perceived.
- the embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and when the computer executable instructions are executed, implements a message routing method based on service chain information.
- FIG. 1 is a flowchart of a message routing method based on service chain information according to an embodiment of the present invention
- FIG. 2 is a schematic diagram of a message routing device based on service chain information according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of service chain information delivery according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of implementation of a service chain function according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of a service function proxy module according to an embodiment of the present invention.
- FIG. 1 is a flowchart of a method for selecting a packet based on service chain information according to an embodiment of the present invention. As shown in FIG. 1 , the method includes:
- Step S101 The service function proxy module acquires, from the service instance maintenance module, a service chain table including service chain information, a service function proxy module address, and a value-added server address information.
- Step S102 The service function proxy module receives the service chain sent by the service control network element module. Message of information;
- Step S103 The service function proxy module sends the packet to the corresponding value-added server for processing according to the service chain information of the packet and the corresponding service chain information in the obtained service chain table, and processes the packet through the value-added server.
- the returned packet performs the next hop processing of the packet.
- the service function proxy module obtains the service chain table from the service instance maintenance module, including: the service control agent module establishes a transmission control protocol TCP/Internet interconnection protocol IP chain by using the service instance maintenance module and the service function agent module.
- the road obtains a service chain table including service chain information, a service function proxy module address, and a value-added server address information.
- the service instance maintenance module creates multiple service function proxy modules on the cloud platform, and establishes a TCP (Transmission Control Protocol)/Internet Protocol IP chain with each service function proxy module.
- the service instance maintenance module sends a service chain table including the service chain information, the service function proxy module address, and the value-added server address information to each of the service function proxy modules by using the established TCP/IP link.
- the method further includes: before the service function proxy module receives the packet including the service chain information sent by the service control network element module, when the user accesses the network, the service control network element module is sent according to the user
- the packet characteristics of the packet are searched for the corresponding service chain identifier, and the corresponding service chain information is obtained according to the service chain identifier.
- the service control network element module searches for the corresponding service chain table according to the service chain information, and uses the search to find
- the service chain table obtains the service function proxy module address; the service control network element module encapsulates the acquired service chain information into the packet carrying the original user packet to be forwarded, and performs proxy according to the obtained service function.
- the module address sends the packet encapsulated with the service chain information to the service function proxy module.
- the service chain information includes a service path identifier and a service index.
- the method further includes: after the service function proxy module receives the packet including the service chain information sent by the service control network element module, the service function proxy module has the service chain information of the received package. Decoding the packet to obtain service chain information and a message; the service function proxy module creates a stream context index of the triplet for the obtained packet; wherein the triplet includes a user IP address, a port number, and Agreement number.
- the service function proxy module sends the packet to the corresponding value-added server according to the service chain information of the packet and the corresponding service chain information in the obtained service link table.
- the service function proxy module obtains a value-added server address by matching the service chain information of the packet with the service chain information in the acquired service chain table; the service function proxy module is obtained according to the acquired
- the value added server address sends the message to the value added server for processing.
- the service function proxy module performs packet next hop processing on the packet returned by the value-added server processing, where the service function proxy module receives the packet returned by processing by the value-added server, and Searching, according to the triplet of the returned message, the service chain table in the created flow context index; the service function proxy module uses the service chain table to obtain the next hop service function proxy module address; the service function proxy module will serve The chain information is encapsulated into the packet carrying the original packet of the user to be forwarded, and the packet encapsulated with the service chain information is sent to the next hop service function proxy module according to the next hop service function proxy module address. .
- FIG. 2 is a schematic diagram of a message routing device based on service chain information according to an embodiment of the present invention.
- the method includes: an obtaining module 201 and a message routing module 202.
- the obtaining module 201 is configured to obtain, from the service instance maintenance module, a service link table that includes service chain information, a service function proxy module address, and a value-added server address information, and a packet that includes the service chain information sent by the service control network element module.
- the message routing module 202 is configured to send, by the service function proxy module, the packet to the corresponding value-added server according to the service chain information of the packet and the corresponding service chain information in the obtained service chain table, and The packet next hop processing is performed on the packet returned by the value-added server processing.
- the obtaining module 201 includes: an acquiring service chain table unit, configured to obtain a transmission control protocol TCP/Internet Protocol IP link established by the service instance maintenance module and the service function proxy module, and obtain the service chain Service chain of information, business function proxy module address and value-added server address information.
- the service instance maintenance module creates multiple service function proxy modules on the cloud platform, and establishes a TCP (Transmission Control Protocol)/Internet Protocol IP chain with each service function proxy module.
- the service instance maintenance module sends a service chain table including the service chain information, the service function proxy module address, and the value-added server address information to each of the service function proxy modules by using the established TCP/IP link.
- the message routing module 202 includes: obtaining a value-added server address unit, configured to obtain value by matching the service chain information of the packet with the service chain information in the obtained service chain table. a server address, configured to send the message to the value-added server for processing according to the obtained value-added server address.
- the service chain is encapsulated by the Generic Routing Encapsulation (GRE), and the service chain information field can be arranged in the GRE message in order, so that the coding is more concise and easier to expand.
- GRE Generic Routing Encapsulation
- the specific method is that the service function agent and the value-added server that does not support the service chain function are interconnected, and the value-added server is assisted to implement the function of the service chain, thereby implementing the service chain routing.
- the service instance maintenance module creates several virtual machine sets on the cloud platform according to the configuration requirements of the configuration file, and then installs the virtual machine sets on the business function agent software through the automatic boot file, and configures the business function agent required. data. In this way, the business function agent can start working.
- the service function agent and the service instance maintenance module establish a TCP link through the IP/TCP protocol, and then the service instance maintenance module delivers the service link table to the service function agent through the TCP link, and the service function agent saves the service.
- Business linked list This table records the business chain identifier, business function proxy address, value-added server address, and other parameters.
- the user packet is first sent to the service control network element.
- the service control network element can distinguish the packet according to the packet characteristics, such as WeChat, QQ, or visited website.
- the packet is matched to the corresponding service chain identifier, and the corresponding service chain information is encapsulated into the GRE packet.
- the service chain table stored in the local area is searched, and the service chain identifier, the service function proxy address, the value-added server address, and other parameters are recorded in the table.
- the service function proxy address of the service chain identifier in a record can be found, and then the message is sent to the service function proxy.
- the service function proxy After receiving the packet, the service function proxy decodes the service chain related parameters in the GRE packet for subsequent routing. At the same time, the triplet information of the user message of the message, that is, the user's IP address, the port number, and the record number of the record service linked list are recorded as a group record, and the record is numbered. Stream context.
- the service function agent then forwards the original message to the value-added server in the service chain path. After processing the received original message, the value-added server sends the message back to the service function agent, and the service function agent re-enters the stream context saved according to the triplet information of the returned user message. After the row is matched and matched to the triplet, it is known that the stream context is the record that was last stored.
- the record has the record number of the service chain, and the service chain table is obtained through the record number, and the service chain table records the service. Function proxy address, value added server address, and other parameters. In this way, the service function proxy address of the next hop is obtained, and then the service chain information is encapsulated into the GRE message, and the packet is sent to the next hop in the routing chain. This achieves the function of routing based on the business chain.
- the embodiment of the present invention mainly distributes the packet according to the path of the service chain arrangement through the service function proxy. This allows the message to not need to go through unnecessary value-added service functions.
- the following is a further description of the message routing method based on the service chain information of the present application from the following aspects:
- the service instance maintenance module creates a service function proxy on the cloud platform by means of instantiation. After the service function proxy is successfully created, a TCP/IP link is established between the two through the internal network plane. In this way, you can click the synchronous service chain set on the service instance maintenance module interface to send all the service agent functions in one group.
- the service instance maintenance module sends a Service Chain information Add message to the service function proxy, and the ADD message carries the path of the saved service chain file.
- the service function agent downloads the service chain table file according to the path of the service chain file in the message, decodes the service chain table file, and saves the data of the service chain table to the local database. If the subsequent service instance maintenance module needs to modify the linked list, it may send a Service Chain information update (Update) message to the service function proxy. After receiving the message, the service function agent updates the service chain table.
- Update Service Chain information update
- the packet of the parameter is sent to the service function proxy 201, and the service function proxy 201 matches the service chain data stored in FIG. 3 according to the SPI (service path identifier) parameter in the service chain, and finds the SPI (service path identifier) correspondingly.
- the address of the value-added server 301 is then sent to the value-added server 301. After the value-added server 301 finishes processing, the original message is sent. Return to the business function agent 201.
- the service function proxy 201 When receiving the original packet, the service function proxy 201 matches the triplet user IP address, port number, and protocol number in the original packet to the stream context, and then retrieves the corresponding service chain, and obtains the service chain through the service chain. The address of the next business function agent 202. Then, the relevant parameters SPI (service path identifier) and SI (service index) of the service chain are encapsulated into the message by the GRE and sent to the service function agent 202. The processing flow of the service function agent 202 is the same as that of the service function agent 201. The search service chain sends the message to the value-added server 302.
- the message is sent back to the service function agent 202, and the service function agent 202 finds the service chain of the message through the triplet of the original message, thereby If the address of the next service proxy is empty, it means that the packet does not need to be forwarded, and the packet is directly sent to the Internet server.
- the uplink packet (UL Data) in the user packet first arrives at the service control network element 101, and the service control network element 101 is a processor that controls the access of the packet, and is responsible for giving The packet is assigned an IP address, charged to the user, and the like.
- the service control network element 101 analyzes the content of the message, and the analysis object may be applied to the website according to the user message or the user level. For example, if the user application is distinguished, the analysis result may be WeChat, QQ, or other. Based on the information, etc., based on the information, find out which service chain ID these messages belong to in the configuration.
- the service chain information includes parameters such as SPI (service path identifier) and SI (service index). Then, the service chain information is placed in the IP packet according to the following table 1.
- the IP packet protocol field is filled in the GRE protocol header 0x002f, and the original packet is placed in the service chain field and sent to Business function agent 201.
- the service function agent 201 is responsible for message routing and passes the message to the corresponding value-added server 301. After receiving the packet forwarded by the service control network element 101, the service function proxy 201 decodes the packet, decodes and stores the service chain information encapsulated in the GRE header according to the format of Table 1, and buffers the original report in the packet.
- the text data that is, the UL Data uplink message in FIG.
- a stream context index of the triple is established for the original message, and the triplet includes the source IP address, port number, and protocol number of the user.
- the value-added server 301 can be a firewall, a file server, or the like. If the value-added server 301 is a firewall, the value-added server 301 will block some messages from being allowed to continue routing. If the value-added server 301 is a file server, the packets will be buffered.
- the service function proxy 201 searches the flow context index according to the triplet of the user IP address, the port number, and the protocol number in the user packet.
- the flow context index is based on the user IP address, port number, and protocol number when the packet is received.
- the triplet created by the triplet finds the service chain related to the packet, and retrieves the address of the next hop service function proxy 202 of the packet through the service chain, and encapsulates the original packet and the service chain information into the GRE packet. And forwarded to the address of the next hop service function agent 202. If the retrieved next hop service function proxy address is empty, it is sent directly to the Internet Server.
- the packet of the packet sent by the service control network element 101 to the service function proxy 201 and the packet sent by the service function proxy 201 to the adjacent service function proxy 202 are as shown in Table 1.
- the protocol field of the data header is filled with 0x002f, which is the protocol number of the GRE protocol.
- the GRE header carries only the basic fields without any extension fields. This is currently 0.
- the service function agent simply matches the GRE header and then decodes according to the format of Table 1.
- the GRE packet data contains parameters such as the total length of the service chain header, the service path identifier, and the service index, and then encapsulates the original packet after the service chain information.
- the total length of the service chain occupies one byte, and the service path identifier and the service index occupy four bytes each.
- the service function agent encapsulates the service chain related information and the original message through the GRE according to the encoding format, and transmits the message.
- the header of the GRE packet is first located in this manner, and then the parameters such as the service path identifier and the service index of the service chain header are decoded.
- FIG. 5 is a schematic structural diagram of a service function proxy module according to an embodiment of the present invention.
- the service function proxy module includes a packet parsing unit, an encapsulation service chain information unit, a triplet and a flow table mapping unit, and a packet. Sending unit.
- the service function proxy module will receive the uplink message from the service control network element or the uplink and downlink message from the other service function agent.
- the packets from the service control network element or other service function agents need to be encapsulated in the GRE to obtain the relevant parameters of the service chain.
- the encapsulated service chain information element and the message decoding unit are reversed, and are configured to encapsulate a downlink packet (DL DATA) sent to the service control network element, and encapsulate an uplink packet (UL DATA) sent to the next hop, that is, the service function proxy. ), these packets need to be encapsulated in the service chain information GRE message.
- DL DATA downlink packet
- UL DATA uplink packet
- the triplet and the flow table mapping unit are responsible for creating a triplet flow context when receiving the uplink message, and after receiving the message from the value-added server, are responsible for retrieving the flow context through the triplet information, thereby finding the relevant Business chain information.
- the flow context is deleted when the flow-related deletion information is received, or the flow context is recovered by flow aging.
- the message sending unit is responsible for sending a message to the module that is linked with the service function agent, for example, to the value-added service server, the service function agent of the next hop, and the message to the service control network element.
- the GRE packet is encapsulated with the relevant parameters of the service chain, and the redundancy coding can be reduced, and the extended parameter is convenient.
- the message sent to the value-added service is the original packet, and the value-added service does not perceive the packet change.
- the embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and when the computer executable instructions are executed, implements a message routing method based on service chain information.
- each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
- This application is not limited to any specific combination of hardware and software.
- the above technical solution can reduce redundant coding, and the extended parameters are convenient; at the same time, the message sent to the value-added service is the original message, and the value-added service does not perceive the packet change.
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Abstract
一种基于业务链信息的报文选路方法及装置，其方法包括：业务功能代理模块从业务实例维护模块获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表；业务功能代理模块接收业务控制网元模块发送的包含业务链信息的报文；业务功能代理模块根据所述报文的业务链信息以及所获取的业务链表中的相应业务链信息，将所述报文发送给相应的增值服务器处理，并对经由所述增值服务器处理返回的报文进行报文下一跳处理。本发明实施例通过GRE报文封装业务链相关参数，可以减少冗余编码，并且扩展参数比较方便；同时发送给增值服务的报文是原始报文，增值服务不会感知到报文变化。
Description
本文涉及但不限于通讯技术领域，涉及一种基于业务链信息的报文选路方法及装置。
随着互联网应用的高速发展，针对不同应用场景提供差异化增值服务已逐步成为运营商增值增收的主要手段。
相关的增值业务提供方式更侧重于ONF(Open Network Foundation开放式网络基金会)定义的架构，通过服务链(Service Chain)实现增值组件灵活编排，实现增值服务组件集成与调度的最佳方案。在如何封装业务链信息上，有的将业务链信息封装在IP(Internet Protocol，互联网协议)报文的扩展选项上，每个字段单独编码，这样会增加冗余字段。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本发明实施例提供一种基于业务链信息的报文选路方法及装置，解决了相关技术中因业务链信息封装在IP报文的扩展选项上，使每个字段单独编码，造成冗余字段增加的问题。
本发明实施例提供了一种基于业务链信息的报文选路方法，包括：
业务功能代理模块从业务实例维护模块获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表；
业务功能代理模块接收业务控制网元模块发送的包含业务链信息的报文；
业务功能代理模块根据所述报文的业务链信息以及所获取的业务链表中的相应业务链信息，将所述报文发送给相应的增值服务器处理，并对经由所述增值服务器处理返回的报文进行报文下一跳处理。
可选地，所述的业务功能代理模块从业务实例维护模块获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表包括：
所述业务功能代理模块通过所述业务实例维护模块与该业务功能代理模块建立的传输控制协议TCP/因特网互联协议IP链路，获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表。
可选地，所述方法还包括：在业务功能代理模块接收业务控制网元模块发送的包含业务链信息的报文之前，
当用户接入网络时，所述业务控制网元模块根据用户发送的报文的报文特征查找相应的业务链标识，并根据所述业务链标识获取相应的业务链信息；
所述业务控制网元模块根据所述业务链信息查找相应的业务链表，并利用查找到的业务链表，获取业务功能代理模块地址；
所述业务控制网元模块将所获取的业务链信息封装到要转发出去的携带了用户原始报文的报文中，并根据所获取的业务功能代理模块地址将这个封装有业务链信息的报文发送到业务功能代理模块。
可选地，所述业务链信息包括业务路径标识和业务索引。
可选地，所述方法还包括：所述的业务功能代理模块接收业务控制网元模块发送的包含业务链信息的报文之后，
所述业务功能代理模块对接收到的封装有业务链信息的报文进行解码处理，得到业务链信息和报文；
所述业务功能代理模块对所得到的报文创建三元组的流上下文索引；
其中，所述三元组包括用户IP地址、端口号以及协议号。
可选地，所述业务功能代理模块根据所述报文的业务链信息以及所获取的业务链表中的相应业务链信息，将所述报文发送给相应增值服务器处理包括：
所述业务功能代理模块通过将所述报文的业务链信息与所获取的业务链表中的业务链信息进行匹配处理，获取增值服务器地址；
所述业务功能代理模块根据所获取的增值服务器地址将所述报文发送到所述增值服务器处理。
可选地，所述的业务功能代理模块对经由所述增值服务器处理返回的报文进行报文下一跳处理包括：
所述业务功能代理模块接收经由所述增值服务器处理返回的报文，并根据返回报文的三元组在所创建的流上下文索引中查找业务链表；
所述业务功能代理模块利用所述业务链表，获取下一跳业务功能代理模块地址；
所述业务功能代理模块将业务链信息封装到所述报文中，并根据下一跳业务功能代理模块地址将封装有业务链信息的报文发送到下一跳业务功能代理模块中。
本发明实施例还提供一种基于业务链信息的报文选路装置，包括：
获取模块，设置为从业务实例维护模块获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表，以及接收业务控制网元模块发送的包含业务链信息的报文；
报文选路模块，设置为根据所述报文的业务链信息以及所获取的业务链表中的相应业务链信息，将所述报文发送给相应的增值服务器处理，并对经由所述增值服务器处理返回的报文进行报文下一跳处理。
可选地，所述的获取模块包括：
获取业务链表单元，设置为通过所述业务实例维护模块与该业务功能代理模块建立的传输控制协议TCP/因特网互联协议IP链路，获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表。
可选地，所述的报文选路模块包括：
获取增值服务器地址单元，设置为通过将所述报文的业务链信息与所获取的业务链表中的业务链信息进行匹配处理，获取增值服务器地址；
发送单元，设置为根据所获取的增值服务器地址将所述报文发送到所述增值服务器处理。
与相关技术相比较，本发明实施例的有益效果在于：
本发明实施例通过GRE(Generic Routing Encapsulation,通用路由封装)报文封装业务链相关参数，可以减少冗余编码，并且扩展参数比较方便；并且发送给增值服务的报文是原始报文，增值服务不会感知到报文变化。本发明实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机可执行指令，所述计算机可执行指令被执行时实现基于业务链信息的报文选路方法。
在阅读并理解了附图和详细描述后，可以明白其它方面。
图1是本发明实施例提供的一种基于业务链信息的报文选路方法的流程图；
图2是本发明实施例提供的一种基于业务链信息的报文选路装置的示意图；
图3是本发明实施例提供的业务链信息下发的示意图；
图4是本发明实施例提供的业务链功能实现的示意图；
图5是本发明实施例提供的业务功能代理模块的示意图。
以下结合附图对本申请的实施例进行详细说明，应当理解，以下所说明的实施例仅用于说明和解释本申请，并不用于限定本申请。
图1是本发明实施例提供的一种基于业务链信息的报文选路方法的流程图，如图1所示，所述方法包括：
步骤S101：业务功能代理模块从业务实例维护模块获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表；
步骤S102：业务功能代理模块接收业务控制网元模块发送的包含业务链
信息的报文；
步骤S103：业务功能代理模块根据所述报文的业务链信息以及所获取的业务链表中的相应的业务链信息，将所述报文发送给相应增值服务器处理，并对经由所述增值服务器处理返回的报文进行报文下一跳处理。
其中，所述的业务功能代理模块从业务实例维护模块获取业务链表包括：所述业务功能代理模块通过所述业务实例维护模块与该业务功能代理模块建立的传输控制协议TCP/因特网互联协议IP链路，获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表。在本实施例中，所述业务实例维护模块在云平台上创建多个业务功能代理模块，并与每个业务功能代理模块之间建立TCP(Transmission Control Protocol，传输控制协议)/互联网协议IP链路；所述业务实例维护模块利用所建立的TCP/IP链路，向所述每个业务功能代理模块下发包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表。
可选地，所述方法还包括：在业务功能代理模块接收业务控制网元模块发送的包含业务链信息的报文之前，当用户接入网络时，所述业务控制网元模块根据用户发送的报文的报文特征查找相应的业务链标识，并根据所述业务链标识获取相应的业务链信息；所述业务控制网元模块根据所述业务链信息查找相应的业务链表，并利用查找到的业务链表，获取业务功能代理模块地址；所述业务控制网元模块将所获取的业务链信息封装到要转发出去的携带了用户原始报文的报文中，并根据所获取的业务功能代理模块地址将封装有业务链信息的报文发送到业务功能代理模块。其中，所述业务链信息包括业务路径标识和业务索引。
可选地，所述方法还包括：所述的业务功能代理模块接收业务控制网元模块发送的包含业务链信息的报文之后，所述业务功能代理模块对接收到的封装有业务链信息的报文进行解码处理，得到业务链信息和报文；所述业务功能代理模块对所得到的报文创建三元组的流上下文索引；其中，所述三元组包括用户IP地址、端口号以及协议号。
可选地，所述的业务功能代理模块根据所述报文的业务链信息以及从所获取的业务链表中的相应业务链信息，将所述报文发送给相应增值服务器处
理包括：所述业务功能代理模块通过将所述报文的业务链信息与从所获取的业务链表中的业务链信息进行匹配处理，获取增值服务器地址；所述业务功能代理模块根据所获取的增值服务器地址将所述报文发送到所述增值服务器处理。
可选地，所述的业务功能代理模块对经由所述增值服务器处理返回的报文进行报文下一跳处理包括：所述业务功能代理模块接收经由所述增值服务器处理返回的报文，并根据返回报文的三元组在所创建的流上下文索引中查找业务链表；所述业务功能代理模块利用所述业务链表，获取下一跳业务功能代理模块地址；所述业务功能代理模块将业务链信息封装到要转发出去的携带了用户原始报文的报文报文中，并根据下一跳业务功能代理模块地址将封装有业务链信息的报文发送到下一跳业务功能代理模块中。
图2是本发明实施例提供的一种基于业务链信息的报文选路装置的示意图，如图2所示，包括：获取模块201和报文选路模块202。所述获取模块201，设置为从业务实例维护模块获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表，以及接收业务控制网元模块发送的包含业务链信息的报文；所述报文选路模块202，设置为业务功能代理模块根据所述报文的业务链信息以及所获取的业务链表中的相应业务链信息，将所述报文发送给相应的增值服务器处理，并对经由所述增值服务器处理返回的报文进行报文下一跳处理。
可选地，所述的获取模块201包括：获取业务链表单元，设置为通过所述业务实例维护模块与该业务功能代理模块建立的传输控制协议TCP/因特网互联协议IP链路，获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表。在本实施例中，所述业务实例维护模块在云平台上创建多个业务功能代理模块，并与每个业务功能代理模块之间建立TCP(Transmission Control Protocol，传输控制协议)/互联网协议IP链路；所述业务实例维护模块利用所建立的TCP/IP链路，向所述每个业务功能代理模块下发包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表。
可选地，所述的报文选路模块202包括：获取增值服务器地址单元，设置为通过将所述报文的业务链信息与从所获取的业务链表中的业务链信息进行匹配处理，获取增值服务器地址；发送单元，设置为根据所获取的增值服务器地址将所述报文发送到所述增值服务器处理。
本发明实施例通过GRE(Generic Routing Encapsulation，通用路由封装)封装业务链，可以在GRE报文里面按照顺序编排业务链信息字段，使得编码更为简洁也更容易扩展。
具体方法为，业务功能代理和不支持业务链功能的增值服务器互联，协助增值服务器实现业务链的功能，从而实现业务链选路。
首先业务实例维护模块根据配置文件的配置要求，在云平台上创建几个虚机集合，然后通过自动化引导文件把这几个虚机集合安装上业务功能代理软件，并配置上业务功能代理需要的数据。这样，业务功能代理就可以开始工作了。创建成功后，业务功能代理和业务实例维护模块会通过IP/TCP协议建立了TCP链路,然后通过这个TCP链路，业务实例维护模块下发业务链表到业务功能代理，业务功能代理保存这份业务链表。这个表里面记录了业务链标识、业务功能代理地址、增值服务器地址以及其它参数。
然后在用户接入网络时，用户报文先发送到业务控制网元，业务控制网元根据报文特性，报文特性可以根据用户应用来区分，比如是微信、还是QQ、还是访问的网站等，匹配到相应的业务链标识，并将相应的业务链信息封装到GRE报文中。然后通过业务链标识查找存储到本地的业务链表，这个表里面记录了业务链标识、业务功能代理地址、增值服务器地址以及其它参数。通过匹配业务链标识，就能找到和业务链标识在一条记录里面的业务功能代理地址，然后发送这个报文到业务功能代理。业务功能代理收到报文后，解码GRE报文中的业务链相关参数，用于后续进行路由选择。同时把该报文的用户报文的三元组信息即用户的IP地址、端口号和记录业务链表的那个记录号作为一组记录记录下来，并对这个记录进行编号，这个记录的编号称为流上下文。然后业务功能代理将原始报文转发到业务链路径中的增值服务器。增值服务器处理完收到的原始报文后，将报文发回给业务功能代理，业务功能代理再根据发回的用户报文的三元组信息重新和上面存下来的流上下文进
行匹配，匹配到三元组后，就知道这个流上下文就是上次存储下来的那条记录，这个记录里面有业务链的记录号，通过这个记录号获取业务链表，这个业务链表里面记录了业务功能代理地址、增值服务器地址以及其它参数。这样就能获取到到下一跳的业务功能代理地址，然后封装业务链信息到GRE报文里面，把报文发给路由链中的下一跳。这样实现了根据业务链选路的功能。
下面结合附图3至附图5对本申请的技术方案的实施作进一步的详细描述：
本发明实施例主要是通过业务功能代理，把报文按照业务链编排的路径进行分发。这样可以使报文不需要经过不必要的增值业务功能。下面从以下几个方面对本申请基于业务链信息的报文选路方法做进一步的说明：
1、业务链信息的下发。如图3所示，业务实例维护模块通过实例化开局的方式在云平台上创建业务功能代理，业务功能代理被成功创建之后，两者之间就通过内部网络平面建立了TCP/IP链路。这样，就可以在业务实例维护模块界面上点击同步下发业务链集合给所有分在一个组里面的业务代理功能。下发完成后，业务实例维护模块就会发Service Chain信息添加(Add)消息给业务功能代理，该ADD消息携带了保存的业务链文件的路径。业务功能代理收到这条消息后，根据消息里面的业务链文件的路径下载业务链表文件，并对业务链表文件进行解码，将业务链表的数据保存到本地数据库。如果后面业务实例维护模块需要修改这个链表，可以发送Service Chain信息更新(Update)消息给业务功能代理。业务功能代理收到这个消息后，对业务链表进行更新。
2、基于业务链信息的报文选路，如图4所示，业务控制网元101，将封装了业务链相关信息的SPI(Servcie Path ID，业务路径标识)、SI(Service Index，业务索引)等参数的报文发送给业务功能代理201，业务功能代理201根据业务链里面的SPI(业务路径标识)参数，和在图3中存储的业务链数据进行匹配，找到SPI(业务路径标识)对应的增值服务器301的地址，然后把原始报文发送给增值服务器301。增值服务器301处理完后，将原始报文发
回给业务功能代理201。业务功能代理201收到返回的原始报文时，通过获取原始报文中的三元组用户IP地址、端口号和协议号匹配到流上下文，进而检索到相应的业务链，通过业务链获取到下一个业务功能代理202的地址。然后把业务链的相关参数SPI(业务路径标识)、SI(业务索引)等通过GRE封装到报文里面发给这个业务功能代理202，业务功能代理202的处理流程和业务功能代理201一样，通过检索业务链把报文发送给增值服务器302，增值服务器302处理完成后把报文发回给业务功能代理202，业务功能代理202通过原始报文的三元组找到该报文的业务链，从而获取到下一个业务代理地址为空，则说明不需要转发了，直接把报文发送到网络服务器(Internet Server)。
也就是说，当用户接入网络时，用户报文中的上行报文(UL Data)会首先到达业务控制网元101，业务控制网元101是控制报文接入的一个处理器，负责给报文分配IP地址、对用户计费等。业务控制网元101通过对报文内容进行分析，分析对象可以根据用户报文应用网站也可以是用户级别等，比如如果是根据用户应用来区分，则分析结果可以是微信、QQ、或者其他的应用网站等，根据这些信息，找到这些类报文在配置中属于哪个业务链ID。然后根据这个业务链ID，找到相应的业务链信息，业务链信息包括：SPI(业务路径标识)、SI(业务索引)等参数。然后将业务链信息按照下表1的顺序把每个字节放到IP报文里面，IP报文协议字段填写GRE的协议头0x002f，并把原始报文放到业务链字段的后面，发送给业务功能代理201。
表1
业务功能代理201负责报文选路，把报文传递到相应的增值服务器301。业务功能代理201在收到业务控制网元101转发过来的报文后，对报文进行解码，把GRE报头封装的业务链信息按照表1的格式解码并保存下来，缓存报文中的原始报文数据，即图4中的UL Data上行报文。同时对这个原始报文建立三元组的流上下文索引，三元组包括用户的源IP地址、端口号以及协议号。
然后根据在GRE报头中解码出来的业务链信息SPI(业务路径标识)、SI(业务索引)等参数和保存下来的业务链表记录中的SPI(业务路径标识)、SI(业务索引)等参数进行匹配，找到增值服务器301的地址，将原始数据报文发送给增值服务器301处理，增值服务器301可以是防火墙、文件服务器等。如果增值服务器301是防火墙，则增值服务器301会将一些报文屏蔽掉，不让其继续路由，如果增值服务器301是文件服务器，则会缓存报文。
增值服务器301处理完成后，如果是将报文发回给业务功能代理201。业务功能代理201根据用户报文中的用户IP地址、端口号以及协议号这个三元组去查找流上下文索引(该流上下文索引是在收到报文时根据用户IP地址、端口号以及协议号这个三元组创建的)，找到该报文相关的业务链，通过业务链检索到该报文的下一跳业务功能代理202地址，将原始报文和业务链信息封装到GRE报文中，并转发到下一跳业务功能代理202的地址。如果检索到的下一跳业务功能代理地址是空，则直接发送到Internet Server。
业务控制网元101发送给业务功能代理201的报文，以及业务功能代理201发送给相邻业务功能代理202的报文的封装情况如表1所示。数据报头的协议字段填写0x002f，这个是GRE协议的协议号。GRE报头只携带基本字段，不带任何扩展字段。这里目前都是0。业务功能代理只要简单的匹配到GRE报头，然后按照表1的格式进行解码就可以了。GRE报文数据里面包含业务链头部的总长度、业务路径标识以及业务索引等参数，然后在业务链信息后面封装了原始报文。业务链头总长度占用一个字节，业务路径标识、业务索引分别占用四个字节长度。业务功能代理按照这种编码格式通过GRE封装业务链相关信息和原始报文，并把报文传送出去。收到报文时也按照这样的方式先定位出GRE报文的头部，然后解码出业务链头部的业务路径标识、业务索引等参数。
图5是本发明实施例提供的业务功能代理模块的结构示意图，如图5所示，业务功能代理模块包括报文解析单元、封装业务链信息单元、三元组和流表映射单元以及报文发送单元。
报文解码单元从上面的描述中可以看出，业务功能代理模块会收到来自业务控制网元的上行报文或者来自其他业务功能代理的上下行报文，对于来
自业务控制网元或者其他业务功能代理的报文需要解GRE的封装，获取业务链相关参数。
封装业务链信息单元和报文解码单元是逆向的，设置为封装发给业务控制网元的下行报文(DL DATA)，以及封装发给下一跳即业务功能代理的上行报文(UL DATA)，这些报文都需要封装业务链信息GRE报文中。
三元组和流表映射单元，负责在收到上行报文时创建三元组的流上下文，在收到来自增值服务器的报文后，负责通过三元组信息检索到流上下文，从而找到相关的业务链信息。在收到流相关的删除信息时将流上下文删除，或者通过流老化回收流上下文。
报文发送单元则负责向和业务功能代理有链接的模块发送报文，比如向增值业务服务器、下一跳的业务功能代理以及给业务控制网元发送报文。
综上所述，本发明实施例具有以下技术效果：
本发明实施例通过GRE报文封装业务链相关参数，可以减少冗余编码，并且扩展参数比较方便；同时发送给增值服务的报文是原始报文，增值服务不会感知到报文变化。
本发明实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机可执行指令，所述计算机可执行指令被执行时实现基于业务链信息的报文选路方法。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件(例如处理器)完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，例如通过集成电路来实现其相应功能，也可以采用软件功能模块的形式实现，例如通过处理器执行存储于存储器中的程序/指令来实现其相应功能。本申请不限制于任何特定形式的硬件和软件的结合。本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或者等同替换，而不脱离本申请技术方案的精神和范围，均应涵盖在本申请的权利要求范围当中。
上述技术方案可以减少冗余编码，并且扩展参数比较方便；同时发送给增值服务的报文是原始报文，增值服务不会感知到报文变化。
Claims (10)
- 一种基于业务链信息的报文选路方法，包括：业务功能代理模块从业务实例维护模块获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表；业务功能代理模块接收业务控制网元模块发送的包含业务链信息的报文；业务功能代理模块根据所述报文的业务链信息以及所获取的业务链表中的相应业务链信息，将所述报文发送给相应的增值服务器处理，并对经由所述增值服务器处理返回的报文进行报文下一跳处理。
- 根据权利要求1所述的方法，其中，所述的业务功能代理模块从业务实例维护模块获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表包括：所述业务功能代理模块通过所述业务实例维护模块与该业务功能代理模块建立的传输控制协议TCP/因特网互联协议IP链路，获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表。
- 根据权利要求2所述的方法，所述方法还包括：在业务功能代理模块接收业务控制网元模块发送的包含业务链信息的报文之前，当用户接入网络时，所述业务控制网元模块根据用户发送的报文的报文特征查找相应的业务链标识，并根据所述业务链标识获取相应的业务链信息；所述业务控制网元模块根据所述业务链信息查找相应的业务链表，并利用查找到的业务链表，获取业务功能代理模块地址；所述业务控制网元模块将所获取的业务链信息封装到要转发出去的携带了用户原始报文的报文中，并根据所获取的业务功能代理模块地址将这个封装有业务链信息的报文发送到业务功能代理模块。
- 根据权利要求1-3任一所述的方法，其中，所述业务链信息包括业务路径标识和业务索引。
- 根据权利要求3所述的方法，所述方法还包括：所述的业务功能代理 模块接收业务控制网元模块发送的包含业务链信息的报文之后，所述业务功能代理模块对接收到的封装有业务链信息的报文进行解码处理，得到业务链信息和报文；所述业务功能代理模块对所得到的报文创建三元组的流上下文索引；其中，所述三元组包括用户IP地址、端口号以及协议号。
- 根据权利要求5所述的方法，其中，所述业务功能代理模块根据所述报文的业务链信息以及所获取的业务链表中的相应业务链信息，将所述报文发送给相应增值服务器处理包括：所述业务功能代理模块通过将所述报文的业务链信息与所获取的业务链表中的业务链信息进行匹配处理，获取增值服务器地址；所述业务功能代理模块根据所获取的增值服务器地址将所述报文发送到所述增值服务器处理。
- 根据权利要求6所述的方法，其中，所述的业务功能代理模块对经由所述增值服务器处理返回的报文进行报文下一跳处理包括：所述业务功能代理模块接收经由所述增值服务器处理返回的报文，并根据返回报文的三元组在所创建的流上下文索引中查找业务链表；所述业务功能代理模块利用所述业务链表，获取下一跳业务功能代理模块地址；所述业务功能代理模块将业务链信息封装到所述报文中，并根据下一跳业务功能代理模块地址将封装有业务链信息的报文发送到下一跳业务功能代理模块中。
- 一种基于业务链信息的报文选路装置，包括：获取模块，设置为从业务实例维护模块获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表，以及接收业务控制网元模块发送的包含业务链信息的报文；报文选路模块，设置为根据所述报文的业务链信息以及所获取的业务链表中的相应业务链信息，将所述报文发送给相应的增值服务器处理，并对经 由所述增值服务器处理返回的报文进行报文下一跳处理。
- 根据权利要求8所述的装置，其中，所述的获取模块包括：获取业务链表单元，设置为通过所述业务实例维护模块与该业务功能代理模块建立的传输控制协议TCP/因特网互联协议IP链路，获取包含业务链信息、业务功能代理模块地址及增值服务器地址信息的业务链表。
- 根据权利要求9所述的装置，其中，所述的报文选路模块包括：获取增值服务器地址单元，设置为通过将所述报文的业务链信息与所获取的业务链表中的业务链信息进行匹配处理，获取增值服务器地址；发送单元，设置为根据所获取的增值服务器地址将所述报文发送到所述增值服务器处理。
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