WO2017054578A1

WO2017054578A1 - Message forwarding method, service chain proxy apparatus and proxy device

Info

Publication number: WO2017054578A1
Application number: PCT/CN2016/094658
Authority: WO
Inventors: 周晟
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-29
Filing date: 2016-08-11
Publication date: 2017-04-06
Also published as: CN106559333A

Abstract

A message forwarding method, a service chain proxy apparatus and a proxy device. The method comprises: a service chain proxy apparatus receiving a message carrying service chain path information; obtaining a user message after processing the received message, and adding query information for searching for a next hop path to the obtained user message; sending the user message, to which the query information is added, to a current target service capability node, and receiving a user message processed and returned by the target service capability node; and acquiring the query information from the returned user message, finding the next hop path according to the query information, and forwarding the returned user message according to the next hop path. The service chain proxy apparatus in the embodiments of the present invention sends a user message to a corresponding service function node after adding query information for searching for a next hop path to the user message, so that the service function node accurately acquires next hop path information according to the query information, and the message is accurately forwarded.

Description

Message forwarding method, service chain proxy device and proxy device

Technical field

This document relates to, but is not limited to, the field of communications, and in particular, to a message forwarding method, a service chain proxy device, and a proxy device.

Background technique

In the traditional network, the traffic of the reference point between the EPC based PLMN and the packet data network (Gi, Reference point between Packet Domain and an external packet data network) needs to pass all the traffic. Service Function (SF) node, as shown in Figure 1. With the widespread use of mobile terminals such as smart phones, the traffic of mobile networks has grown very rapidly, and the pressure on mobile networks is increasing. Among them, the business of Hypertext Transfer Protocol (HTTP) accounts for a large proportion. In order to optimize the traffic distribution, it is desirable to classify the traffic on the SGi/Gi side, and arrange the traffic path according to the service type, so that the service traffic can be processed according to the pre-programmed path and only through the SF node on the path. It does not need to pass all the SF nodes in the traditional network, as shown in Figure 2.

As a service orchestration, it is necessary to add service chain path information in the packet header, and all SF nodes on the service chain path need to be able to parse the information. The SF node in the current network does not support this parsing function. Therefore, in order not to change the SF node in the related technology, but also to support the service orchestration and optimize the traffic, a service chain proxy (Proxy) can be introduced, which completes the analysis of the service chain path and the header of the packet service chain path. (The SF node cannot identify the header, so it needs to be deleted) to delete, and distribute the traffic to the relevant SF node. The SF node receives the packet, sends the packet back to the Proxy after the service processing, and sends the proxy to the next one of the service chain. The business function node or the next business chain agent, the process is shown in Figure 3.

When using the service chain proxy to shield the service chain path information for the SF node, the SF node may modify the original packet when processing the packet sent by the service chain proxy, for example, between the networks that modify the original packet. Interconnected protocol (IP), port, or information that inserts a uniform resource locator (URL) in the message; the service chain path orchestration is based on the original http message, and the service The chain proxy does not perceive the SF node to modify the packet. This will cause the packet processed by the SF node to be sent to the proxy. The proxy cannot obtain the original IP or port information from the packet, and cannot find the packet. The correct service link path information causes the packet to fail to be forwarded.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a message forwarding method, a service chain proxy device and a proxy device, which can implement the service chain agent to obtain the service chain path information after the service function node modifies the message, and complete the packet forwarding.

The embodiment of the invention provides a packet forwarding method, including:

The service chain proxy device receives the message with the service chain path information;

The service chain proxy device processes the received packet to obtain a user packet, and adds query information for finding a next hop path to the obtained user packet;

The service chain proxy device sends the user message with the added query information to the current target service capability node, and receives the user message returned after the target service capability node processes;

The service chain proxy device obtains the query information from the returned user packet, searches for the next hop path according to the query information, and forwards the returned user packet according to the next hop path.

In an optional embodiment of the present invention, the query information includes service chain path information or association information associated with service chain path information;

Adding the query information to the user packet includes:

When the query information includes the service chain path information, the service chain proxy device extracts the service chain path information in the packet; the service chain proxy device adds the service chain path information to the processed office. User message;

When the query information includes the association information associated with the service chain path information, the service chain proxy device extracts the service chain path information in the packet and the associated information associated with the service chain path information for association storage; The service chain proxy device adds the associated information stored in the association The user message obtained after the processing.

In an optional embodiment of the present invention, when the query information includes the service chain path information, the searching for the next hop path according to the query information includes:

Extracting the service chain path information from a user packet returned by the target service capability node;

Determining, according to the service chain path information, a next hop path of the returned user packet;

When the query information is the service chain path information, the searching for the next hop path according to the query information includes:

Extracting the association information from a user message returned by the target service capability node;

Finding service chain path information associated with the related information according to the related information;

Determining, according to the service chain path information, a next hop path of the returned user packet.

In an optional embodiment of the present invention, when the query information includes the service chain path information as the association information, the association information includes: a protocol IP address, a destination IP address, a source port, and a target that are interconnected between the source networks. One or more kinds of information in the port and service chain path information.

In an optional embodiment of the present invention, the adding the query information to the obtained user packet includes:

Inserting a custom header field in the user message;

The query information is added in the custom header field.

In an optional embodiment of the present invention, forwarding the user packet according to the next hop path includes:

When the next hop path corresponds to another target service capability node other than the target service capability node that returns the user message, the user message is sent to the other target service capability node.

In an optional embodiment of the present invention, the packet forwarding method further includes:

When the next hop path corresponds to another service chain proxy device, the query information in the user packet is deleted, and the user packet encapsulates the service chain header of the service chain path information. Send to the other service chain proxy device.

The embodiment of the invention further provides a service chain proxy device, where the service chain proxy device comprises:

a receiving module, configured to receive a message with service chain path information;

a processing module, configured to process the received packet to obtain a user packet, and add query information for finding a next hop path in the obtained user packet;

a delivery module, configured to send the user message with the added query information to the current target service capability node, and receive the user message returned by the target service capability node;

The management module is configured to obtain the query information from the returned user message returned by the returned target service capability node, find the next hop path according to the query information, and return the returned location according to the next hop path. The user message is forwarded.

In an optional embodiment of the present invention, the processing module includes a first extraction submodule, a first addition submodule, a second extraction submodule, and a second addition submodule.

The first extraction sub-module is configured to: when the query information includes service chain path information, extract service chain path information in the packet;

The first adding sub-module is configured to add the service chain path information extracted by the first extraction sub-module to the user message obtained after the processing;

The second extraction sub-module is configured to: when the query information includes the association information associated with the service chain path information, extract the service chain path information in the packet and the associated information associated with the service chain path information. Associated storage;

The second adding sub-module is configured to add the association information to the user packet by associating and storing the second extraction sub-module.

In an optional embodiment of the present invention, the management module includes a first obtaining submodule, a first determining submodule, a second obtaining submodule, an associated query submodule, and a second determining submodule;

The first obtaining sub-module is configured to: when the query information includes service chain path information, extract the service chain path information from a user message returned by the target service capability node;

The first determining sub-module is configured to determine a next hop path of the user packet according to the service chain path information extracted by the first acquiring sub-module;

The second obtaining submodule is configured to

When the query information includes the service chain path information as the association information, the query information is set to extract the association information from the user message returned by the target service capability node;

The association query sub-module is configured to find the service chain path information associated with the extracted association information according to the extracted association information;

The second determining submodule is configured to determine a next hop path of the user packet according to the service chain path information.

In an optional embodiment of the present invention, when the query information includes the service chain path information as the association information, the association information includes: a source IP address, a destination IP address, a source port, a target port, and a service chain path information. One or more kinds of information.

In an optional embodiment of the present invention, the service chain proxy device further includes an inserting module, configured to insert a custom header field in the obtained user message; the processing module is configured to be in the user The query information is added to the custom header field in the message.

In an optional embodiment of the present invention, the management module is configured to: obtain the query information from a user message returned by the returned target service capability node, and search for the query information according to the query information. One-hop path

An embodiment of the present invention further provides a proxy device, including the service chain proxy device as described above.

Compared with the related art, the technical solution provided by the embodiment of the present invention includes: the service chain proxy device receives the packet with the service link path information; after receiving the received packet, the user packet is obtained, and the obtained user packet is obtained. The query information for finding the next hop path is added; the user message with the added query information is sent to the current target service capability node, and the user message returned after the target service capability node is processed is received; The query information is obtained in the user packet, and the next hop path is found according to the query information, and the returned user packet is forwarded according to the next hop path. This is the hair In the service chain proxy device user packet in the embodiment, the query information for finding the next hop path is added to the corresponding service function node, so that even if the service function node has the original IP in the packet, After the port is modified, the service chain proxy device can accurately obtain the next hop path information according to the query information in the packet, and implement accurate packet forwarding.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic diagram of a network traffic flow in a related art;

2 is a schematic diagram of network traffic flow after the introduction of a service chain;

3 is a schematic diagram of network traffic flow after the introduction of a service chain proxy;

4 is a schematic flowchart of a packet forwarding method according to Embodiment 1 of the present invention;

FIG. 5 is a schematic structural diagram of a service chain proxy device according to Embodiment 2 of the present invention; FIG.

6 is a schematic structural view of the processing module of FIG. 5;

7 is another schematic structural view of the processing module of FIG. 5;

8 is a schematic structural view of the management module of FIG. 5;

9 is another schematic structural diagram of the management module of FIG. 5;

10 is a schematic flowchart 1 of a packet forwarding method according to Embodiment 3 of the present invention;

FIG. 11 is a second schematic flowchart of a packet forwarding method according to Embodiment 3 of the present invention;

FIG. 12 is a third schematic flowchart of a packet forwarding method according to Embodiment 3 of the present invention.

Embodiments of the invention

Embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The service chain proxy device in the embodiment of the present invention adds the query information for finding the next hop path to the corresponding service capability node, and receives the target service capability node for the user packet. After the user packet is returned, the next hop path can be found according to the query information added in the user packet, and the user packet is forwarded according to the next hop path. In this way, even if the service function node modifies the original IP address and port in the packet, the service chain The proxy device can still accurately obtain the next hop path information according to the query information in the packet, and implement accurate packet forwarding. The embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1:

Referring to FIG. 4, the packet forwarding method provided in this embodiment includes:

Step 401: The service chain proxy device receives the packet with the service chain path information; the packet is from the gateway on the SGi/Gi side, or from the previous hop node, and may include: an HTTP URL request message, etc.;

Step 402: The service chain proxy device processes the received packet to obtain a user packet, and adds query information for finding a next hop path to the obtained user packet.

The user message in the step includes the user message obtained by removing the transport layer information, such as the header of the service chain path of the received message, by the service chain proxy device;

The query information added in this step may be used to search for the next hop path of the packet, and the manner and/or location of the query information set in the packet may not be modified as long as the service function node is satisfied; for example; The method that can be set includes: inserting a custom header field in the user message, and then adding query information in the custom header field;

Step 403: The service chain proxy device sends the user packet with the added query information to the current target service capability node, and receives the user packet returned by the target service capability node.

The current target service capability node in the step includes the service chain proxy device receiving the packet of the gateway, and determining the service capability node corresponding to the next hop from the service chain path of the packet;

Step 404: The service chain proxy device obtains the previously added query information from the returned user packet, searches for the next hop path according to the query information, and forwards the returned user packet according to the next hop path.

In this embodiment, the information added by the service chain proxy device in the user packet may be used to query the service chain path information of the packet, and the query information may include the service chain path information of the packet itself, according to the service chain path information. The information of the next hop path may be correctly found; the query information may also include the association information associated with the service chain path information, where the association information includes association information corresponding to the service chain path information of the packet, that is, According to the association information, any information of the service chain path information of the packet can be found; according to actual needs, the query information includes the service chain path information. When the information is associated, the association information may include one or more of a source IP address, a destination IP address, a source port, a destination port, and a service chain path information, as long as the service chain path information of the packet can be found. Optionally, the association information includes a source IP address, a destination IP address, a source port, a target port, and a service chain path information.

It should be noted that the service chain path information may include: a service path identifier (SPI), and a service path location (SI, Service Index).

Optionally, when the query information includes the service chain path information, the service chain proxy device adds the query information to the user packet, including:

The service chain proxy device extracts the service chain path information in the packet sent by the gateway, and the embodiment of the present invention may extract the header of the service chain path of the packet;

The service chain proxy device adds the service chain path information to the user packet. The embodiment of the present invention can insert a custom header field in the user packet, and the custom header field location can be set at the end of the user packet, and then the customization is performed. The obtained service chain path information can be added to the header field; since the custom header field is not modified by the service function node, the accuracy of the subsequently obtained service chain path information can be ensured.

Optionally, when the query information includes the association information associated with the service chain path information, the service chain proxy device adds the query information to the user packet, including:

The service chain proxy device extracts service chain path information in the packet and association information associated with the service chain path information, and stores the service chain path information from the service chain path header of the packet, and then One or more of the source IP address, the destination IP address, the source port, the target port, and the service chain path information are extracted as the associated information in the parsed user packet;

The service chain proxy device adds the association information to the user packet. In the embodiment of the present invention, a custom header field can be inserted in the user packet, and the custom header field location can be set at the end of the user packet, and then in the custom header. The associated information is added to the domain. The customized header field is not modified by the service function node. Therefore, the associated information obtained is the original information of the packet, and the packet can be obtained according to the original information. The service chain path information determines the next hop according to the obtained service chain path information.

Correspondingly, when the query information is the service chain path information, extracting the query information from the user message fed back from the service function node by the service chain proxy device and finding the next hop path includes:

The service chain path information is extracted from the user packet returned by the target service capability node, and the service chain path information is obtained from the custom header field in the user packet in the embodiment of the present invention;

The next hop path of the user packet is determined according to the service chain path information.

Correspondingly, when the query information is the associated information, extracting the query information from the user message fed back from the service function node by the service chain proxy device and finding the next hop path includes:

Extracting the association information from the user packet returned by the target service capability node, where the embodiment of the present invention can obtain the service chain path information from the custom header field in the user packet;

Searching, according to the extracted association information, the service chain path information associated with the service, that is, the service chain path information of the packet;

The next hop path of the user packet is determined according to the found service chain path information.

It should be noted that searching for the service chain path information according to the related information is a common technical means of those skilled in the art, and details are not described herein.

In this embodiment, the service chain proxy device determines, according to the found service chain path information, that the object corresponding to the next hop path of the user packet may be another target service capability node, or may be another service chain proxy device. When the next hop path corresponds to another target service capability node, the service chain proxy device may directly send the user packet to the other target service capability node; when the service chain proxy device sends the packet, the service chain proxy device may The query information in the user packet is updated and sent out, or can be directly sent out when the update is not needed, for example, when the added query information is the source IP address, the destination IP address, the source port, the target port, and the service chain path. One or more of the information and the next hop can be correctly found according to the query information. When the next hop path corresponds to another service chain proxy device, the service chain proxy device deletes the query information added in the user packet, and also deletes the custom header field in the user packet, and encapsulates the user packet. The service chain header of the service chain path information of the message is sent to the other service chain proxy device. The other service chain proxy device repeats the steps shown in FIG. 4 after receiving the message.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the message forwarding method.

Embodiment 2:

The embodiment provides a service chain proxy device, which can be disposed in the proxy device. As shown in FIG. 5, the service chain proxy device includes:

The receiving module 1 is configured to receive a message with service chain path information; the message may include a gateway from the SGi/Gi side, or a message from a previous hop node, which may be a HTTP URL request message;

The processing module 2 is configured to process the received packet to obtain the user packet, and add the query information for finding the next hop path in the obtained user packet; where the user packet may include the service chain proxy device Transmitting the obtained user message by the transport layer information such as the header of the service chain path of the received message;

The query information added here may be used to search for the next hop path of the packet, and the manner and/or location of the query information set in the packet may not be modified as long as the service function node is satisfied; for example, the query The information may be set by inserting a custom header field in the user message, and then adding the query information in the custom header field; therefore, the service chain proxy device in this embodiment may include the insertion module 5, and is set to be obtained. A custom header field is inserted in the user packet; the processing module 2 is configured to add the query information in the custom header field in the user packet;

The delivery module 3 is configured to send the user message with the added query information to the current target service capability node, and receive the user message returned by the target service capability node; where the current target service capability node includes the service chain After receiving the packet of the gateway, the proxy device determines a service capability node corresponding to the next hop from the service chain path of the packet;

The management module 4 is configured to obtain the query information from the user message returned by the returned target service capability node, find the next hop path according to the query information, and perform the returned user message according to the next hop path. Forward.

The information added by the processing module 2 in this embodiment may be used to query the service chain path information of the packet, and the query information may include the service chain path information of the packet itself, and the path information according to the service chain may be correctly found. The next hop path information; the query information may also include association information associated with the service chain path information, where the association information includes association information corresponding to the service chain path information of the packet, that is, the association information may be searched according to the association information. Any information about the service chain path information of the packet; according to the actual needs, the query information may include the service chain path information as the associated information. The association information may include one or more of a source IP address, a destination IP address, a source port, a destination port, and a service chain path information, as long as the service chain path information of the packet can be found. Optionally, the association information includes a source IP address, a destination IP address, a source port, a target port, and a service chain path information.

Correspondingly, referring to FIG. 6, in one example, the processing module 2 includes a first extraction sub-module 21 and a first addition sub-module 22, the query information is service chain path information; and the first extraction sub-module 21 is set to extract The service chain path information in the packet may be extracted from the header of the service chain path of the packet in the embodiment of the present invention. The first adding sub-module 22 is configured to add the service chain path information to the user packet, which may be used in the embodiment of the present invention. Insert a custom header field in the user packet. The custom header field location can be set at the end of the user packet, and then the obtained service chain path information can be added in the custom header field; It will not be modified by the service function node, so the accuracy of the subsequently obtained service chain path information can be guaranteed.

Referring to FIG. 7, in another example, the processing module 2 includes a second extraction submodule 23 and a second addition submodule 24, the query information is associated information associated with the service chain path information; and the second extraction submodule 23 The service chain path information and the associated information associated with the service chain path information are associated and stored, and the service chain path information in the message and the associated information associated with the service chain path information are associated and stored. For example, the service chain path information is extracted from the service chain path header of the packet, and then the source IP address, the destination IP address, the source port, the target port, and the service chain path information are extracted from the user packet obtained by the parsing. One or more of the information is associated; the second adding sub-module 24 is configured to add the associated information to the user packet, and the embodiment of the present invention can insert a custom header field in the user packet, where the custom header field can be Set at the end of the user message, and then add the acquired association information in the custom header field; since the custom header field will not be repaired by the service function node , Thus guaranteeing the subsequent original information is acquired related information packet, and further information can be obtained based on the original message to the service chain path information, determine the next hop path according to the service information acquisition chain.

Correspondingly, as shown in FIG. 8 , in an example, the management module 4 includes a first obtaining submodule 41 and a first determining submodule 42 , and the query information is service chain path information; and the first obtaining submodule 41 is configured to The service chain path information is extracted from the user packet returned by the target service capability node, and the service chain path information is obtained from the custom header field in the user packet in the embodiment of the present invention; The determining submodule 42 is configured to determine a next hop path of the user packet according to the service chain path information;

Referring to FIG. 9, in another example, the management module 4 includes a second obtaining sub-module 43, an associated query sub-module 44, and a second determining sub-module 45. The query information includes service chain path information as associated information. The second obtaining sub-module 43 is configured to extract the related information from the user message returned by the target service capability node, and the embodiment of the present invention may obtain the service chain path information from the custom header field in the user packet; the associated query sub-module And the second determining sub-module 45 is configured to determine the next hop path of the user packet according to the service chain path information, where the service chain path information, that is, the service chain path information of the packet, is set according to the association information. .

In this embodiment, the management module 4 determines, according to the found service chain path information, that the object corresponding to the next hop path of the user packet may be another target service capability node, or may be another service chain proxy device. When the next hop path corresponds to another target service capability node, when the management module 4 sends the message, the query information in the user message may be updated and sent out according to the actual situation, or may be directly updated when the message is not needed. Outgoing, for example, when the added query information is one or more of a source IP address, a destination IP address, a source port, a target port, and a service chain path information, and the next hop can be correctly found according to the query information. When the next hop path corresponds to another service chain proxy device, the management module 4 deletes the query information added in the user packet, and also deletes the custom header field in the user packet, and encapsulates the user packet. The service chain header of the service chain path information of the message is sent to the other service chain proxy device.

Embodiment 3:

For a better understanding of the embodiments of the present invention, the embodiments of the present invention are further illustrated by the following examples.

Example one

Referring to FIG. 10, the query information in the example is original IP address information, and may include at least one of a source IP address and a destination IP address. The processing process includes:

Step 1001: The service chain proxy device receives the packet with the service chain path information in the header, and takes the service chain path information from the head and records it;

Step 1002: The service chain proxy device removes the header of the service chain path of the packet to obtain a user packet, and inserts a custom header field in the user packet, where the information in the header field is the IP address information of the packet.

Step 1003: The service chain proxy device sends the modified user packet to the corresponding target service function node.

Step 1004: After processing the packet, the target service function node modifies the IP address of the user packet, and sends the user packet to the service chain proxy device.

Step 1005: After receiving the user packet, the service chain proxy device extracts the original IP address of the user packet from the header field of the user packet, and then searches for the service chain path information of the original packet to find the next service path. Jumping node, assuming that the next node is another service chain proxy device;

Step 1006: The service chain proxy device removes the custom header field in the user packet, encapsulates the service chain header information, and sends the packet to the next service chain proxy device in the service chain path.

Example two

Referring to FIG. 11 , the query information in the example is original port information, and may include at least one of a source port and a destination port. The processing process includes:

Step 1101: The service chain proxy device receives the packet with the service chain path information in the header, and records the service chain path information from the header.

Step 1102: The service chain proxy device removes the header of the service chain path of the packet to obtain the user packet, and inserts the user packet into the custom header field, where the information in the header field is the port information of the packet.

Step 1103: The service chain proxy device sends the modified user packet to the corresponding target service function node.

Step 1104: After processing the packet, the target service function node modifies the port of the user packet, and sends the user packet to the service chain proxy device.

Step 1105: After receiving the user packet, the service chain proxy device extracts the original port of the user packet from the header field of the user packet, and then searches for the service chain path information of the original packet to find the next hop of the service path. Node, assuming that the next node is another service function node;

Step 1106: The service chain proxy device directly sends the user packet to the next service function node of the service chain path.

Example three

Referring to FIG. 12, the query information in the example includes service path information of the packet; The process includes:

Step 1201: The service chain proxy device receives the packet with the service chain path information in the header, and takes the service chain path information from the header and records it;

Step 1202: The service chain proxy device removes the header of the service chain path of the packet to obtain the user packet, and inserts the user packet into the custom header field, where the information in the header field is the service chain path information.

Step 1203: The service chain proxy device sends the modified user packet to the corresponding target service function node.

Step 1204: After processing the packet, the target service function node sends the user packet to the service chain proxy device.

Step 1205: After receiving the user packet, the service chain proxy device extracts the original service chain path information of the user packet from the header field of the user packet, and then finds the next hop node of the service path, and assumes that the next node is another. a business function node;

Step 1206: The service chain proxy device directly sends the user packet to the next service function node of the service chain path.

The above is an alternative embodiment of the present invention, and is an illustration of the embodiments of the present invention, and it is not considered that the implementation of the present invention is limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing 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, being executed by a processor and stored in a memory. Programs/instructions to implement their respective functions. The invention is not limited to any specific form of combination of hardware and software.

Although the embodiments disclosed in the present application are as above, the content described is only for facilitating understanding of the present application. The embodiments adopted are not intended to limit the present application, such as the specific implementation method in the embodiments of the present invention. Any modifications and changes in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope defined by the appended claims shall prevail.

Industrial applicability

The foregoing technical solution implements accurate forwarding of the message.

Claims

A packet forwarding method, where the packet forwarding method includes:

The service chain proxy device receives the message with the service chain path information;

The service chain proxy device processes the received packet to obtain a user packet, and adds query information for finding a next hop path to the obtained user packet;

The service chain proxy device sends the user message with the added query information to the current target service capability node, and receives the user message returned after the target service capability node processes;

The service chain proxy device obtains the query information from the returned user packet, searches for the next hop path according to the query information, and forwards the returned user packet according to the next hop path.
The packet forwarding method according to claim 1, wherein the query information comprises service chain path information or associated information associated with service chain path information;

Adding the query information to the user packet includes:

When the query information includes the service chain path information, the service chain proxy device extracts the service chain path information in the packet; the service chain proxy device adds the service chain path information to the processed office. User message;

When the query information includes the association information associated with the service chain path information, the service chain proxy device extracts the service chain path information in the packet and the associated information associated with the service chain path information for association storage; The service chain proxy device adds the associated information stored in the association to the user packet obtained after the processing.
The packet forwarding method according to claim 2, wherein when the query information includes the service chain path information, the finding the next hop path according to the query information includes:

Extracting the service chain path information from a user packet returned by the target service capability node;

Determining, according to the service chain path information, a next hop path of the returned user packet;

When the query information is the service chain path information, the searching for the next hop path according to the query information includes:

Extracting the association information from a user message returned by the target service capability node;

Finding service chain path information associated with the related information according to the related information;

Determining, according to the service chain path information, a next hop path of the returned user packet.
The packet forwarding method according to claim 2, wherein when the query information includes the service chain path information as association information, the association information includes: a protocol IP address, a destination IP address, and a source interconnected between the source networks. One or more pieces of information in the port, destination port, and service chain path information.
The message forwarding method according to any one of claims 1 to 4, wherein the adding the query information to the obtained user message comprises:

Inserting a custom header field in the user message;

The query information is added in the custom header field.
The packet forwarding method according to any one of claims 1 to 4, wherein forwarding the user packet according to the next hop path comprises:

When the next hop path corresponds to another target service capability node other than the target service capability node that returns the user message, the user message is sent to the other target service capability node.
The packet forwarding method according to any one of claims 1 to 4, wherein the packet forwarding method further comprises:

When the next hop path corresponds to another service chain proxy device, the query information in the user packet is deleted, and the user packet encapsulates the service chain header of the service chain path information. Send to the other service chain proxy device.
A service chain proxy device, the service chain proxy device comprising:

a receiving module, configured to receive a message with service chain path information;

a processing module, configured to process the received packet to obtain a user packet, and add query information for finding a next hop path in the obtained user packet;

a delivery module, configured to send the user message with the added query information to the current target service capability node, and receive the user message returned by the target service capability node;

The management module is configured to obtain the query information from the returned user message returned by the returned target service capability node, find the next hop path according to the query information, and return the returned location according to the next hop path. The user message is forwarded.
The service chain proxy device according to claim 8, wherein the processing module comprises a first extraction submodule, a first addition submodule, a second extraction submodule, and a second addition submodule.

The first extraction sub-module is configured to: when the query information includes service chain path information, extract service chain path information in the packet;

The first adding sub-module is configured to add the service chain path information extracted by the first extraction sub-module to the user message obtained after the processing;

The second extraction sub-module is configured to: when the query information includes the association information associated with the service chain path information, extract the service chain path information in the packet and the associated information associated with the service chain path information. Associated storage;

The second adding sub-module is configured to add the association information to the user packet by associating and storing the second extraction sub-module.
The service chain proxy device according to claim 9, wherein the management module comprises a first obtaining submodule, a first determining submodule, a second obtaining submodule, an associated query submodule, and a second determining submodule;

The first obtaining sub-module is configured to: when the query information includes service chain path information, extract the service chain path information from a user message returned by the target service capability node;

The first determining sub-module is configured to determine a next hop path of the user packet according to the service chain path information extracted by the first acquiring sub-module;

The second obtaining submodule is configured to

When the query information includes the service chain path information as the association information, the query information is set to extract the association information from the user message returned by the target service capability node;

The association query sub-module is configured to find the service chain path information associated with the extracted association information according to the extracted association information;

The second determining submodule is configured to determine a next hop path of the user packet according to the service chain path information.
The service chain proxy device according to claim 9, wherein when the query information includes service chain path information as association information, the association information includes: a source IP address, a destination IP address, a source port, a target port, and a service chain. One or more pieces of information in the path information.
The service chain proxy device according to any one of claims 9-11, wherein the service chain proxy device further comprises an insertion module configured to insert a custom header field in the obtained user message; The module is configured to add the query information in the custom header field in the user message.
The service chain proxy device according to any one of claims 9 to 11, wherein the management module is configured to obtain the query information from a user message returned by the returned target service capability node. Finding a next hop path according to the query information;

When the next hop path corresponds to another target service capability node other than the target service capability node that returns the user message, the user message is sent to the other target service capability node.
The service chain proxy device according to any one of claims 9 to 11, wherein the management module is configured to obtain the query information from a user message returned by the returned target service capability node. Finding a next hop path according to the query information;

When the next hop path corresponds to another service chain proxy device, the query information in the user packet is deleted, and the user packet encapsulates the service chain header of the service chain path information. Send to the other service chain proxy device.
A proxy device comprising the service chain proxy device of any of claims 9-14.