WO2019174578A1

WO2019174578A1 - Method and device for sending packet matching information, method and device for receiving packet matching information, storage medium and electronic device

Info

Publication number: WO2019174578A1
Application number: PCT/CN2019/077852
Authority: WO
Inventors: 赵艳杰
Original assignee: 中兴通讯股份有限公司
Priority date: 2018-03-12
Filing date: 2019-03-12
Publication date: 2019-09-19
Also published as: CN110266595A

Abstract

Disclosed is a method for sending packet matching information, comprising: extracting, according to matching information signaling, from a packet received by an open flow exchange first matching information corresponding to the packet received by the open flow exchange, wherein the matching information instruction is an instruction indicated by an open flow controller after the open flow exchange performs matching information support capability negotiation with the open flow controller; and sending the extracted first matching information to the open flow controller. Also disclosed are a device for sending packet matching information, a method and device for receiving packet matching information, a storage medium and an electronic device.

Description

Method and device for transmitting message matching information, method and device for receiving message matching information, storage medium and electronic device

The present application claims the priority of the Chinese Patent Application, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present disclosure relates to the field of communications, for example, to a method and device for transmitting message matching information, a method and device for receiving message matching information, a storage medium, and an electronic device.

Background technique

As an example of a software-defined network, an OpenFlow (OF) network adopts an architecture in which a control plane is separated from a forwarding plane. FIG. 1 is a schematic diagram of an OF network component architecture. As shown in FIG. 1 , the control plane of the OF network is implemented by the OF controller, the forwarding plane of the OF network is implemented by the OF switch, and the OF protocol is run between the OF controller and the OF switch. The OF controller uses the OF protocol to send a flow table (Flow Table) and a group table (Group Table) to the OF switch, thereby achieving the purpose of controlling data forwarding, and realizing the separation of the control plane and the forwarding plane.

The OF switch specification developed by the Open Networking Foundation (ONF) defines three types of messages that interact between the OF controller and the OF switch: messages from the OF controller to the OF switch, asynchronous messages, and symmetric messages. The asynchronous message includes a packet-sending message (packet-in message), and the function of the message is to send the data packet to be sent and the related pipeline information processed by the pipeline to the OF controller.

The packet-in message defined by the OF protocol includes the following types of information: (1) Pipeline processing related information, including the flow table identification number (Identification, ID) of the query, the identifier (cookie) of the flow entry, and the delivery. Reasons, etc.; (2) Data message related information, including message matching information, message length, and message content. The protocol describes that the packet matching information includes two types. One type is the pipeline matching field information. The matching information cannot be obtained by parsing the data packet, for example, the inbound port number of the received data packet. The matching information sent by the protocol includes the pipeline matching information supported by all devices, and the matching information does not have a value of 0. The other type is the matching information related to the content of the data packet. The information can be obtained by parsing the data packet, such as Layer 2 Media Access Control (MAC) address information and Layer 3 Internet Protocol (IP) address. Information, four-layer port number information, and more. The protocol describes that these matching information is optionally supported, and given the efficiency of sending packet-in messages, most switches should not include these matching information. Thus, the OF controller should not rely on these matching information and should parse the data packet extraction itself.

Some problems caused by the above constraints of the protocol on the matching information include: (1) limiting the flexibility of sending matching information, such as forcing all pipeline matching information to be sent, not according to the capabilities or service requirements of the device itself. Flexible selection and delivery; (2) will lead to some interoperability and compatibility issues; for example, the device sends a pipeline matching field that is not supported by different vendors, causing problems in docking; or the device upgrade supports sending a new pipeline matching field. The connection to the previous controller is faulty and the upgrade fails.

An effective solution has not been proposed for the interoperability and compatibility between the OpenFlow switch and the OpenFlow controller existing in the related art.

Summary of the invention

An embodiment of the present disclosure provides a method and device for transmitting message matching information, a method and device for receiving message matching information, a storage medium, and an electronic device, to at least solve the OpenFlow switch and the OpenFlow controller existing in the related art. Interoperability and compatibility issues.

According to an embodiment of the present disclosure, a method for sending message matching information is provided, which is applied to an OpenFlow switch, including: extracting a message received from the OpenFlow switch according to a matching information instruction, and extracting the OpenFlow switch. The first matching information corresponding to the received message, wherein the matching information command is indicated by the OpenFlow controller after the OpenFlow switch and the OpenFlow controller perform the matching information support capability negotiation. An instruction to send the extracted first matching information to the open flow controller.

According to another embodiment of the present disclosure, a method for receiving message matching information is further provided, which is applied to an OpenFlow controller, including: after the OpenFlow controller and the OpenFlow switch perform matching information support capability negotiation Sending a matching information instruction to the open flow switch;

And receiving the first matching information sent by the OpenFlow switch, where the first matching information is extracted by the OpenFlow switch from the received message according to the matching information instruction, and the received packet is received by the OpenFlow switch. Corresponding matching information.

According to still another embodiment of the present disclosure, a device for sending message matching information is provided, which is applied to an OpenFlow switch, and includes: an extracting module, configured to extract a message received from the OpenFlow switch according to a matching information instruction. The first matching information corresponding to the packet received by the OpenFlow switch, where the matching information command is performed after the OpenFlow switch and the OpenFlow controller perform the matching information support capability negotiation. An instruction indicated by the flow controller; the sending module is configured to send the extracted first matching information to the open flow controller.

According to still another embodiment of the present disclosure, a device for sending message matching information, which is applied to an OpenFlow controller, includes:

a sending module, configured to send a matching information instruction to the OpenFlow switch after the OpenFlow controller and the OpenFlow switch perform the matching information support capability negotiation;

a receiving module, configured to receive first matching information sent by the OpenFlow switch, where the first matching information is extracted by the OpenFlow switch from the received message according to the matching information instruction Match information corresponding to the received message.

According to still another embodiment of the present disclosure, there is also provided a storage medium having stored therein a computer program, wherein the computer program is configured to execute the method of any of the above embodiments at runtime.

According to still another embodiment of the present disclosure, there is also provided an electronic device comprising a memory and a processor, wherein the memory stores a computer program, the processor being configured to execute the computer program to perform any of the above implementations The method described in the example.

DRAWINGS

The drawings described herein are provided to provide a further understanding of the present disclosure, which is a part of the present disclosure, and the description of the present disclosure and the description thereof are not intended to limit the disclosure. In the drawing:

1 is a schematic diagram of an OF network component architecture in accordance with an embodiment of the present disclosure;

2 is an interaction diagram of a method for transmitting message matching information according to an embodiment of the present disclosure;

FIG. 3 is an interaction diagram of a method for receiving message matching information according to an embodiment of the present disclosure; FIG.

4 is a timing diagram of an OF controller and OF switch matching information capability negotiation according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a flow table of an OF controller carrying a matching information instruction according to an embodiment of the present disclosure; FIG.

FIG. 6 is a schematic diagram of a flow table for carrying an instruction to carry matching information by another OF controller according to an embodiment of the present disclosure; FIG.

7 is a timing diagram of another OF controller and OF switch matching information capability negotiation according to an embodiment of the present disclosure;

8 is a timing diagram of still another OF controller and OF switch matching information capability negotiation according to an embodiment of the present disclosure;

9 is a timing chart of still matching an OF controller and an OF switch matching information capability according to an embodiment of the present disclosure;

FIG. 10 is a structural block diagram of an apparatus for transmitting message matching information according to an embodiment of the present disclosure; FIG.

11 is a structural block diagram of an apparatus for receiving message matching information according to an embodiment of the present disclosure;

FIG. 12 is a structural block diagram of an electronic device according to an embodiment of the present disclosure.

detailed description

The present disclosure will be hereinafter described with reference to the drawings in conjunction with the embodiments. The embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

The terms "first", "second" and the like in the specification and claims of the present disclosure and the above-mentioned figures are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

Embodiment 1

The solution in the embodiment of the present disclosure can be applied to an OpenFlow network, and the present disclosure will be described below in conjunction with the embodiments.

In this embodiment, a method for sending message matching information is provided. FIG. 2 is an interaction diagram of a method for sending message matching information according to an embodiment of the present disclosure. As shown in FIG. 2, the interaction includes step 202. Go to step 204.

In step 202, the first matching information corresponding to the packet received by the OpenFlow switch is extracted according to the matching information command, and the matching information command is in the An instruction indicated by the OpenFlow controller after the OpenFlow switch and the OpenFlow controller negotiate the matching information support capability;

In step 204, the extracted first matching information is sent to the open flow controller.

The OpenFlow switch may be referred to as an OF switch in the present disclosure, and may be referred to as an OpenFlow switch directly. The OpenFlow controller may be referred to as an OF controller, or may be directly referred to as an open switch. Flow controller). FIG. 2 is an example in which the OpenFlow switch performs the above operations as an example.

In the above embodiment, the matching information instruction is indicated by the OpenFlow controller after the OpenFlow switch and the OpenFlow controller perform the matching information support capability negotiation, and the first matching information is in accordance with the matching information command. The extracted matching information corresponding to the received message, therefore, the first matching information sent to the OpenFlow controller is to satisfy the interoperability and compatibility between the OpenFlow switch and the OpenFlow controller. Therefore, the problem of interoperability and compatibility between the OpenFlow switch and the OpenFlow controller in the related art can be solved, and the interconnection and interworking between the OpenFlow switch and the OpenFlow controller can be ensured.

In an embodiment, before the first matching information corresponding to the packet received by the OpenFlow switch is extracted from the packet received by the OpenFlow switch according to the matching information, the method further includes: the OpenFlow switch Performing the matching information support capability negotiation with the OpenFlow controller by: receiving a negotiation request message from the OpenFlow controller, where the negotiation request message is used to request the OpenFlow switch to The matched matching information is reported to the OpenFlow controller. If the OpenFlow switch supports the sending of the matching information, the matching information supported by the OpenFlow switch is sent to the OpenFlow controller according to the foregoing negotiation request message. Instructing the OpenFlow controller to determine matching information supported by the OpenFlow switch and the OpenFlow controller according to the matching information supported by the OpenFlow switch and the matching information supported by the OpenFlow controller. . In this embodiment, after the channel is established, the OF controller and the OF switch can actively initiate an OFMPP_TABLE_FEAUTRES request to query the flow table capability of the OF switch (corresponding to the matching information supported by the switch in this embodiment). After receiving the OFMPP_TABLE_FEAUTRES request, the OF switch reports the flow table capability supported by the device (that is, the OF switch) to the OF controller through the OFMP_TABLE_FEAUTRES response message. The flow table capability includes the ability to send message matching information supported by the device. After receiving the OFMPP_TABLE_FEAUTRES response message, the OF controller compares the packet matching information capability in the response message with the locally supported packet matching information capability (corresponding to the matching information supported by the OpenFlow controller in this embodiment). . The principle of negotiation is to determine whether the two have the common ability to match information. If the two have the common ability to match information, the negotiation can be successful, and the matching information capability after negotiation is the intersection of the two (corresponding to the open in this embodiment). Matching information supported by both the flow switch and the open flow controller). If the two do not have a common ability to match information, the negotiation fails. If the negotiation is successful, the subsequent OF controller can send the packet matching information to the packet to match the packet matching information sent by the packet-in message. If the negotiation fails, the OF controller can perform related operations based on the local policy. For example, the current OF channel connection can be selected to be closed, and the specific policy can be defined by the OF controller.

In an embodiment, after the matching information supported by the OpenFlow switch is sent to the OpenFlow controller according to the negotiation request message, and received from the OpenFlow switch according to the matching information instruction. Before the packet extracting the first matching information corresponding to the packet received by the OpenFlow switch, the method further includes: receiving a first flow table from the OpenFlow controller, where the OpenFlow controller supports In the case that the matching information is sent, the first predetermined message of the first flow table carries the matching information command; and the first predetermined message that is determined to be extended in the first flow table carries the matching information. And instructing, in the case that the matching information supported by the OpenFlow switch includes the matching information indicated by the matching information instruction, creating a second flow table corresponding to the first flow table, where, in the second The extended information message is carried in the extended second predetermined message of the flow table. In this embodiment, the OF controller may adopt an extended experiment message (corresponding to the extended first predetermined message of the first flow table in this embodiment, and of course, other messages or other fields in the extended flow table may also be adopted. To implement the packet carrying information matching instruction (corresponding to the matching information command in this embodiment), the OF switch receives the flow table that carries the message matching information command sent by the OF controller (corresponding to the embodiment in this embodiment) In the first flow table, the validity check of the capability of the matching information is first performed. If the matching information carried in the flow table is in the local support range, it is considered to be valid, and the corresponding forwarding entry is generated locally (corresponding to the first embodiment). The second flow table) carries the matching information instruction in the extended second predetermined message of the forwarding entry. Once the OF switch generates a local forwarding flow entry, the subsequent data packet will be sent to the controller according to the matching information set in the instruction. Because the related OF pipeline supports multi-level flow table operations, data packets are sent to the controller after being processed by multi-level flow entries. During this period, each time the flow entry is processed, the relevant matching information is stored in the uploading set according to the corresponding matching information instruction. After the pipeline processing ends, if the data packet is finally sent to the controller, this The matching information in the sent collection is organized and sent together.

In an embodiment, before the first matching information corresponding to the packet received by the OpenFlow switch is extracted from the packet received by the OpenFlow switch according to the matching information, the method further includes: The matching information instruction is obtained in the second predetermined message extended in the second flow table. In this embodiment, the matching information instruction is implemented by using an extended message, and the OF switch obtains the matching information instruction in the extended message in the locally generated forwarding list item.

In an embodiment, after receiving the first flow table from the OpenFlow controller, the method further includes: the matching information supported by the OpenFlow switch does not include the matching information indicated by the matching information instruction. In case, the error response message is replied to the open flow controller. In this embodiment, if the matching information carried in the flow table (corresponding to the first flow table in this embodiment) exceeds the local support range, or the matching information support capability negotiation between the OpenFlow switch and the OpenFlow controller fails, Refusing to add the flow entry, the OF controller can perform related operations based on the local policy. For example, the current OF channel connection can be closed. The specific policy can be defined by the OF controller and an error message is returned to the OF controller.

In an embodiment, after receiving the negotiation request message from the OpenFlow controller, the method further comprises: receiving, from the OpenFlow controller, if the OpenFlow switch does not support matching information transmission The first flow table, wherein the first flow table does not carry the matching information instruction; the second matching information corresponding to the message is extracted according to a first predetermined default processing manner, and the second matching information is Sent to the open flow controller. In this embodiment, when some OF switches do not support the capability of reporting matching information, the OF controller is required to not send the flow entry carrying the matching information command to the OF switches. When the OF switch sends a data packet to the controller, the second matching information is selected and sent according to the default implementation of the OF switch.

In an embodiment, after the matching information supported by the OpenFlow switch is sent to the OpenFlow controller according to the negotiation request message, and received from the OpenFlow switch according to the matching information instruction. The method further includes: receiving a first flow table from the open flow controller, where the open flow controller does not If the matching information instruction is sent, the first flow table does not carry the matching information command; and if the first flow table does not carry the matching information command, according to the second predetermined default The processing manner extracts third matching information corresponding to the packet, and sends the third matching information to the OpenFlow controller. In this embodiment, when some OF controllers do not support the matching information command, in order to facilitate the compatibility of the OF controllers, when the OF switch sends a data packet to the OF controller, the corresponding flow entry is not carried. If the matching information command is used, the third matching information is selected and sent according to the default implementation of the OF switch.

In an embodiment, the OpenFlow switch extracts, according to the matching information instruction, the first matching information corresponding to the packet received by the OpenFlow switch, and the OpenFlow switch extracts the packet received by the OpenFlow switch. The first matching information is sent to the open flow controller.

Embodiment 2

In this embodiment, a method for receiving message matching information is also provided. FIG. 3 is an interaction diagram of a method for receiving message matching information according to an embodiment of the present disclosure. As shown in FIG. 3, the interaction includes The following steps 302 to 304 are performed.

In step 302, after the open flow controller and the open flow switch perform the matching information support capability negotiation, the matching information command is sent to the open flow switch.

In step 304, the first matching information sent by the OpenFlow switch is received, where the first matching information is extracted by the OpenFlow switch from the received message according to the matching information instruction. Match information corresponding to the received message.

In an embodiment, the matching information command is used by the OpenFlow switch to extract, according to the matching information command, a packet received from the OpenFlow switch according to the matching information command, corresponding to the packet, after receiving the packet. First matching information, and transmitting the first matching information to the OpenFlow controller.

The OpenFlow controller may be referred to as an OF controller in the present disclosure, and may also be referred to as an OpenFlow controller directly. The OpenFlow switch may be referred to as an OF switch, or may be directly referred to as an OpenFlow controller. For open flow switches). FIG. 3 is an example in which the open flow controller performs the above operation as an example.

In the above embodiment, after the matching information support capability negotiation is performed between the OpenFlow controller and the OpenFlow switch, the OpenFlow controller sends a matching information command to the OpenFlow switch, so that the OpenFlow switch can follow the matching information command. The packet received by the OpenFlow switch extracts the matching information corresponding to the received packet. Therefore, the first matching information received by the OpenFlow controller meets the interworking between the OpenFlow switch and the OpenFlow controller. Sex and compatibility. Therefore, the problem of interoperability and compatibility between the OpenFlow switch and the OpenFlow controller in the related art can be solved, and the interconnection and interworking between the OpenFlow switch and the OpenFlow controller can be ensured.

In an embodiment, the OpenFlow controller performs the matching information support capability negotiation with the OpenFlow switch, and includes: sending a negotiation request message to the OpenFlow switch, where the negotiation request message is used to request the The open flow switch reports the matching information supported by the open flow switch to the open flow controller; and when the open flow switch supports the sending of the matching information, receiving the open that is sent by the open flow switch according to the negotiation request message. Matching information supported by the flow switch; determining matching information supported by the OpenFlow switch and the OpenFlow controller according to the matching information supported by the OpenFlow switch and the matching information supported by the OpenFlow controller.

In an embodiment, the sending the matching information instruction to the OpenFlow switch includes: sending, by the OpenFlow controller, the first flow table to the OpenFlow switch, where the OpenFlow controller supports the sending of the matching information command, where The extended first instruction message of the first flow table carries the matching information instruction. The first flow table is configured to instruct the open flow switch to create a second flow corresponding to the first flow table when determining that the matching information supported by the open flow switch includes the matching information indicated by the matching information instruction The table, the extended second predetermined message of the second flow table carries the matching information instruction.

In an embodiment, after transmitting the first flow table to the open flow switch, the method further comprises: receiving an error response message from the open flow switch, wherein the error response message is used to indicate the opening The matching information supported by the flow switch does not include the matching information indicated by the matching information instruction.

In an embodiment, after the sending the negotiation request message to the OpenFlow switch, the method further includes: sending, by the OpenFlow switch, the first flow table to the OpenFlow switch if the OpenFlow switch does not support the sending of the matching information. The first flow table does not carry the matching information instruction. The first flow table is configured to instruct the open flow switch to extract second matching information corresponding to the packet according to a first predetermined default processing manner, and send the second matching information to the open flow controller. Receiving, by the OpenFlow switch, second matching information that is sent by the OpenFlow switch, where the second matching information is extracted from the received packet by the OpenFlow switch according to a first predetermined default processing manner, and the received Match information corresponding to the message.

In an embodiment, after determining matching information supported by the OpenFlow switch and the OpenFlow controller according to the matching information supported by the OpenFlow switch and the matching information supported by the OpenFlow controller, The method further includes: sending, to the open flow switch, a first flow table, where the open flow controller does not support the sending of the matching information command, where the first flow table does not carry the matching information instruction. The first flow table is configured to instruct the open flow switch to extract third matching information corresponding to the packet according to a second predetermined default processing manner, and send the third matching information to the open flow controller. Receiving, by the open flow switch, third matching information, where the third matching information is extracted by the OpenFlow switch from the received message according to a second predetermined default processing manner, Match information corresponding to the received message.

In an embodiment, after the OpenFlow controller and the OpenFlow switch perform the matching information support capability negotiation, the OpenFlow controller sends the matching information instruction to the OpenFlow switch.

Embodiment 3

The disclosure will be described below with reference to examples:

Example 1

FIG. 4 is a timing chart of the matching information capability negotiation between the OF controller and the OF switch. As shown in FIG. 4, in this embodiment, the OF controller and the OF switch matching information capability negotiation process includes the following three steps:

Step 1, the OF controller is the negotiated active initiator. After the OF channel is established (corresponding to S401 and S402 in FIG. 4), the OFMPP_TABLE_FEAUTRES request (corresponding to the negotiation request message) is sent to the OF switch to query the flow table of the OF switch. Capability (corresponding to matching information supported by the OpenFlow switch, corresponding to S403 in FIG. 4).

Step 2: After receiving the request, the OF switch forwards the flow table capability supported by the device to the OF controller through the OFMPP_TABLE_FEAUTRES response message (corresponding to S404 in FIG. 4). In this embodiment, the flow table capability supported by the OF switch includes a matching information capability, which is implemented by extending an experiment message (corresponding to the extended first predetermined message of the first flow table). The extended experiment message format is as follows:

The extension subtype exp_type is defined as follows:

The variable length field oxm_fields represents the matching information set currently supported by the OF switch, and each oxm_fields type represents a matching information. The content of oxm_fields is consistent with the oxm_fields semantics in the struct ofp_match structure defined by the protocol specification.

In this embodiment, when the OF switch replies to the OFMPP_TABLE_FEAUTRES response message, the uplink matching information carried includes the following oxm_field, as shown in Table 1:

Table 1

For convenience of description, the set of uplink matching information capabilities of the OF switch is referred to as {0, 1, 2, 3, 5, 11, 12, 14}.

Step 3: After receiving the OFMPP_TABLE_FEAUTRES response message, the OF controller compares the matching information capability in the response message with the locally supported matching information capability. In this embodiment, the matching information capability set of the OF controller is as shown in Table 2:

Table 2

For convenience of description, the matching information capability set of the OF controller is referred to as {0, 1, 2, 3, 4, 5, 6, 11, 12}. After negotiation and comparison, the common matching information capability set of the OF controller and the OF switch is obtained as {0, 1, 2, 3, 5, 11, 12}.

The following describes the process of the OF controller sending the flow table carrying the matching information command and the process of processing the flow table by the OF switch, including the following four steps:

Step 501: The OF controller sends a flow table (corresponding to the first flow table), where the flow table includes the following information (corresponding to 1, 2, and 3 in FIG. 5): (1) matching Ethernet type 0x0806; Matching information instruction, the instruction requires accurate delivery of the matching information set to {0, 11}; (3) OFPIT_APPLY_ACTIONS instruction, carrying a forwarding operation (OFPAT_OUTPUT) behavior, the port number is reserved by the controller, and the port number will be The packet is sent to the controller (CONTROLLER). The matching information instruction is implemented by using an extended experiment message. The extended experiment message format is as follows:

The variable length field oxm_fields has the same meaning as oxm_fields in the above struct ofp_instruction_experiment_upsend.

Step 502: After receiving the flow table, the OF switch first checks the validity of the matching information command, because the locally supported matching information capability set is {0, 1, 2, 3, 5, 11, 12, 14}, {0, 11} belongs to the capability set. Therefore, it is determined that the matching information carried in the flow table is valid, and the corresponding flow entry is locally created.

Step 503: When the OF switch receives the packet with the Ethernet type 0x0806, extracts the matching information {0, 11} according to the matching information command in the flow entry, and encapsulates it in the match field of the packet-in message to the OF controller.

Step 504: After receiving the sent packet-in message, the OF controller can perform corresponding processing based on the matching information, for example, performing an Adress resolution protocol (ARP) learning, and the specific processing logic is determined by the OF controller.

There is another case in this embodiment, that is, if the set of matching information carried in the instruction sent by the controller exceeds the capability range supported by the OF switch, the OF switch may choose to reply an error message to the OF controller. The process is described below in conjunction with Figure 6, which includes the following three steps:

Step 601, the OF controller sends a flow table, the flow table includes the following information (corresponding to 1, 2, 3 in Figure 6): (1) matching Ethernet type 0x0806; (2) sending matching information instructions, The instruction requires that the matching information set is accurately sent to {0, 7}; (3) the OFPIT_APPLY_ACTIONS instruction carries an OFPAT_OUTPUT behavior, and the port number is the controller reserved port CONTROLLER.

Step 602: After receiving the flow table, the OF switch first checks the validity of the matching information command, because the locally supported matching information capability set is {0, 1, 2, 3, 5, 11, 12, 14 }, and {0,7} does not belong to the capability set, so it is judged that the matching information carried in the flow table is invalid, and an error message is returned to the controller. The error type of the error message is OFPET_BAD_INSTRUCTION, and the error code adopts the newly extended OFPBIC_UNSUP_UNSEND_FIELD, indicating that the upload matching information set by the OF controller is not supported. The OFPIC_UNSUP_UNSEND_FIELD extension is defined as OFPBIC_UNSUP_UNSEND_FIELD=10:

Step 603, after receiving the error message sent by the OF controller, the OF controller knows that the matching information of the delivered flow table exceeds the capability range of the OF switch. At this time, the controller may select the upper layer service to continue to feed back the error, and the specific processing logic Determined by the OF controller.

Example 2

FIG. 7 is a timing chart of another OF controller and OF switch matching information capability negotiation. As shown in FIG. 7, in this embodiment, the OF controller and the OF switch matching information capability negotiation process includes the following three steps:

Step 1, the OF controller is the negotiated active initiator. After the OF channel is established (corresponding to S701 and S702 in FIG. 7), the OFMPP_TABLE_FEAUTRES request is sent to the OF switch to query the flow table capability of the OF switch (corresponding to FIG. 7 S703).

Step 2: After receiving the request, the OF switch forwards the flow table capability supported by the device to the OF controller through the OFMPP_TABLE_FEAUTRES response message (corresponding to S704 in FIG. 7). In this embodiment, the flow table capability supported by the OF switch includes the matching information capability, and the capability is implemented by extending the experiment message, and the message format is the same as that of the implementation example 1.

In this example, when the OF switch replies to the OFPMP_TABLE_FEAUTRES response message, the matching information carried in the OF switch is as shown in Table 3:

table 3

上送匹配信息类型Send matching information type	数值Numerical value	含义meaning
OFPXMT_OFB_IN_PORTOFPXMT_OFB_IN_PORT	00	交换机入端口Switch in port
OFPXMT_OFB_TCP_DSTOFPXMT_OFB_TCP_DST	1414	TCP目的端口号TCP destination port number

For convenience of description, the capability of the uplink matching information capability of the OF switch is hereinafter referred to as {0, 14}.

Step 3: After receiving the OFMPP_TABLE_FEAUTRES response message, the OF controller compares the matching information capability in the response message with the locally supported matching information capability. In this embodiment, the matching information capability set of the OF controller is as shown in Table 4:

Table 4

上送匹配信息类型Send matching information type	数值Numerical value	含义meaning
OFPXMT_OFB_IN_PHY_PORTOFPXMT_OFB_IN_PHY_PORT	11	交换机物理入端口Switch physical in port
OFPXMT_OFB_METADATAOFPXMT_OFB_METADATA	22	流表项之间的元数据Metadata between flow entries
OFPXMT_OFB_ETH_DSTOFPXMT_OFB_ETH_DST	33	以太网目的地址Ethernet destination address
OFPXMT_OFB_ETH_SRCOFPXMT_OFB_ETH_SRC	44	以太网源地址Ethernet source address
OFPXMT_OFB_ETH_TYPEOFPXMT_OFB_ETH_TYPE	55	以太网帧类型Ethernet frame type
OFPXMT_OFB_VLAN_VIDOFPXMT_OFB_VLAN_VID	66	VLAN IDVLAN ID

For convenience of description, the matching information capability set of the OF controller is referred to as {1, 2, 3, 4, 5, 6}. After negotiation and comparison, it is found that there is no common set of matching information capabilities. At this time, the OF controller considers that the current OF switch is uncontrollable, and can choose to close the current OF channel connection. The specific processing logic is determined by the OF controller.

Example 3

FIG. 8 is a timing chart of another OF controller and OF switch matching information capability negotiation. As shown in FIG. 8, in this embodiment, the OF controller and the OF switch matching information capability negotiation process includes the following three steps:

Step 1, the OF controller is the negotiated active initiator. After the OF channel is established (corresponding to S801 and S802 in FIG. 8), the OFPMP_TABLE_FEAUTRES request is sent to the OF switch to query the flow table capability of the OF switch (corresponding to FIG. 8). S803).

Step 2: After receiving the request, the OF switch forwards the flow table capability supported by the device to the OF controller through the OFMPP_TABLE_FEAUTRES response message (corresponding to S804 in FIG. 8). In this embodiment, the flow table capability supported by the OF switch includes the matching information capability, and the capability is implemented by extending the experiment message, and the message format is the same as that of the instance 1.

In this example, when the OF switch replies to the OFPMP_TABLE_FEAUTRES response message, the matching information carried in the OF switch is as shown in Table 5:

table 5

For convenience of description, the capability of the uplink matching information capability of the OF switch is hereinafter referred to as {0, 1, 2}.

Step 3: After the OF controller receives the OFMPP_TABLE_FEAUTRES response message, since the OF controller does not support the matching information capability negotiation in this embodiment, the matching information capability negotiation is not performed. The matching information command is not carried in the flow entry sent by the subsequent OF controller. When the OF switch sends a data packet to the OF controller, it finds that the corresponding flow entry does not carry the matching information command, and then the matching information is extracted according to the local default processing logic. In this way, the OF controller that does not support setting the matching information can normally exchange the packet-in message with the OF switch that supports setting the matching information, and there is no compatibility problem.

Example 4

FIG. 9 is a timing chart for further matching the capability information of the OF controller and the OF switch. As shown in FIG. 9, in this embodiment, the OF controller and the OF switch matching information capability negotiation process include the following three steps:

Step 1, the OF controller is the negotiated active initiator. After the OF channel is established (corresponding to S901 and S902 in FIG. 9), the OFPMP_TABLE_FEAUTRES request is sent to the OF switch to query the flow table capability of the OF switch (corresponding to FIG. 9). S903).

Step 2: After receiving the request message, the OF switch forwards the flow table capability supported by the device to the OF controller through the OFMPP_TABLE_FEAUTRES response message (corresponding to S904 in FIG. 9). In this embodiment, since the OF switch does not support the matching information command in the flow entry, the response message of the reply does not include the capability of matching information.

Step 3: After receiving the OFPMP_TABLE_FEAUTRES response message, the OF controller finds that the OF switch does not support the ability to set the matching information, so the matching information capability negotiation is not performed. The matching information command is not carried in the flow entry sent by the subsequent OF controller.

When the OF switch sends a data packet to the OF controller, it finds that the corresponding flow entry does not carry the matching information command, and then the matching information is extracted according to the local default processing logic.

In this way, the OF switch that does not support setting the matching information can normally exchange the packet-in message with the OF controller that supports setting the matching information, and there is no compatibility problem.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the foregoing embodiment can be implemented by means of software plus a general hardware platform, or can be implemented by hardware, and the technical solution of the present disclosure is essentially The part that contributes to the related technology can be embodied in the form of a software product stored in a storage medium (such as Read-Only Memory (ROM)/Random Access Memory (Random Access Memory). The RAM, the disk, and the optical disk include a plurality of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method described in one or more embodiments of the present disclosure.

Embodiment 4

In this embodiment, a device for transmitting message matching information is also provided, which is used to implement the foregoing embodiments and implementation manners, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. The apparatus described in the following embodiments may be implemented in software, or in hardware, or a combination of software and hardware.

10 is a structural block diagram of a device for transmitting message matching information according to an embodiment of the present disclosure. As shown in FIG. 10, the device includes the following module: an extracting module 1002, configured to follow the matching information instruction from the OpenFlow switch. The received message extracts first matching information corresponding to the packet received by the OpenFlow switch, where the matching information command is that the OpenFlow switch and the OpenFlow controller perform matching information support capability negotiation. Thereafter, the instruction indicated by the OpenFlow controller; the first sending module 1004 is connected to the extracting module 1002, and configured to send the extracted first matching information to the OpenFlow controller.

In an embodiment, the apparatus further includes: a first negotiation module, configured to extract first matching information corresponding to the packet received by the OpenFlow switch in the message received from the OpenFlow switch according to the matching information instruction. The negotiation information support capability negotiation is performed with the OpenFlow controller by: receiving a negotiation request message from the OpenFlow controller, where the negotiation request message is used to request the OpenFlow switch to The matching information supported by the OpenFlow controller is sent to the OpenFlow controller, and the matching information supported by the OpenFlow switch is sent to the OpenFlow switch according to the negotiation request message. Opening a flow controller to instruct the open flow controller to determine, according to the matching information supported by the OpenFlow switch and the matching information supported by the OpenFlow controller, that the OpenFlow switch and the OpenFlow controller are both Supported matching information.

In an embodiment, the foregoing apparatus is further configured to: after transmitting the matching information supported by the OpenFlow switch to the OpenFlow controller according to the negotiation request message, and in the following Before receiving the first matching information corresponding to the packet received by the OpenFlow switch, the packet received by the OpenFlow switch receives the first flow table from the OpenFlow controller, where the OpenFlow controller supports the In the case that the matching information instruction is sent, the extended first predetermined message of the first flow table carries the matching information instruction; and the first predetermined message that determines the extension of the first flow table carries the matching information instruction And in a case that the matching information supported by the OpenFlow switch includes the matching information indicated by the matching information instruction, creating a second flow table corresponding to the first flow table, where the second flow is The extended second predetermined message of the table carries the matching information instruction.

In an embodiment, the apparatus is further configured to: before extracting, from the packet received by the OpenFlow switch, the first matching information corresponding to the packet received by the OpenFlow switch according to the matching information command, from the foregoing The matching information instruction is obtained in the second predetermined message extended in the second flow table.

In an embodiment, the apparatus is further configured to: after receiving the first flow table from the OpenFlow controller, the matching information supported by the OpenFlow switch does not include the matching information indicated by the matching information instruction. In the case, an error response message is replied to the OpenFlow controller.

In an embodiment, the apparatus is further configured to: after receiving the negotiation request message from the OpenFlow controller, receive the information from the OpenFlow controller if the OpenFlow switch does not support the transmission of the matching information. a first flow table, wherein the first flow table does not carry the matching information instruction; the second matching information corresponding to the message is extracted according to a first predetermined default processing manner, and the second matching information is sent Give the open flow controller.

In an embodiment, the apparatus is further configured to, after transmitting the matching information supported by the OpenFlow switch to the OpenFlow controller according to the negotiation request message, and in the following Receiving, by the OpenFlow switch, the first flow information from the OpenFlow controller before extracting the first matching information corresponding to the packet received by the OpenFlow switch, where the OpenFlow controller does not If the matching information instruction is sent, the first flow table does not carry the matching information command; and if the first flow table does not carry the matching information command, according to the second predetermined default The processing manner extracts third matching information corresponding to the packet, and sends the third matching information to the OpenFlow controller.

In an embodiment, the foregoing apparatus is applicable to an OpenFlow switch, that is, the packet received by the OpenFlow switch from the OpenFlow switch according to the matching information command is extracted and received by the OpenFlow switch. The first matching information corresponding to the text; and the extracted first matching information is sent by the OpenFlow switch to the OpenFlow controller.

Embodiment 5

In this embodiment, a device for receiving message matching information is further provided. FIG. 11 is a structural block diagram of a device for transmitting message matching information according to an embodiment of the present disclosure. As shown in FIG. Module:

The second sending module 1102 is configured to send a matching information command to the OpenFlow switch after the OpenFlow controller and the OpenFlow switch perform the matching information support capability negotiation.

The receiving module 1104 is configured to receive the first matching information sent by the OpenFlow switch, where the first matching information is extracted by the OpenFlow switch from the received message according to the matching information command. The matching information corresponding to the received message.

In an embodiment, the apparatus further includes: a second negotiation module, configured to perform matching information support capability negotiation with the OpenFlow switch by sending the matching information command to the OpenFlow switch: The OpenFlow switch sends a negotiation request message, where the negotiation request message is used to request the OpenFlow switch to report the matching information supported by the OpenFlow switch to the OpenFlow controller; and the OpenFlow switch supports the sending of the matching information. In the case that the matching information supported by the OpenFlow switch sent by the OpenFlow switch according to the negotiation request message is received; according to the matching information supported by the OpenFlow switch and the matching supported by the OpenFlow controller. The information determines matching information supported by both the OpenFlow switch and the OpenFlow controller.

In an embodiment, the second sending module 1102 may send a matching information command to the OpenFlow switch by: sending the first flow table to the OpenFlow switch when the OpenFlow controller supports sending the matching information command, The extended first predetermined message of the first flow table carries the matching information instruction. The first flow table is configured to instruct the open flow switch to create a second flow corresponding to the first flow table when determining that the matching information supported by the open flow switch includes the matching information indicated by the matching information instruction The table, the extended second predetermined message of the second flow table carries the matching information instruction.

In an embodiment, the apparatus is further configured to: after transmitting the first flow table to the OpenFlow switch, receive an error response message from the OpenFlow switch, where the error response message is used to indicate the OpenFlow switch The supported matching information does not include the matching information indicated by the matching information instruction.

In an embodiment, the apparatus is further configured to: after the sending the negotiation request message to the open flow switch, send the first flow table to the open flow switch, if the open flow switch does not support the sending of the matching information, where The matching information instruction is not carried in the first flow table. The first flow table is configured to instruct the open flow switch to extract matching information corresponding to the packet according to a first predetermined default processing manner, and send the matching information to the open flow controller. The device is further configured to receive second matching information that is sent by the OpenFlow switch, where the second matching information is extracted by the OpenFlow switch from the received packet according to a first predetermined default processing manner. Matching information corresponding to the received message.

In an embodiment, the apparatus is further configured to: determine, according to the matching information supported by the OpenFlow switch and the matching information supported by the OpenFlow controller, that the OpenFlow switch and the OpenFlow controller are both After the matching information is not supported, the OpenFlow controller does not support the sending of the matching information command, and sends the first flow table to the OpenFlow switch, where the matching information command is not carried in the first flow table. The first flow table is configured to instruct the open flow switch to extract matching information corresponding to the packet according to a second predetermined default processing manner, and send the matching information to the open flow controller. The device is further configured to receive the third matching information that is sent by the OpenFlow switch, where the third matching information is received by the OpenFlow switch from the received packet according to a second predetermined default processing manner. The extracted matching information corresponding to the received message.

In an embodiment, the foregoing apparatus may be applied to an OpenFlow controller, that is, after the OpenFlow controller and the OpenFlow switch perform the matching information support capability negotiation, the OpenFlow controller refers to the The open flow switch sends the matching information command.

The one or more modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are respectively in any combination. Located in different processors.

Embodiment 6

Embodiments of the present disclosure also provide a storage medium having stored therein a computer program, wherein the computer program is configured to execute the method of any of the above embodiments at runtime.

In the present embodiment, the above storage medium may be arranged to store a computer program for performing the following steps:

S1, extracting first matching information corresponding to the packet received by the OpenFlow switch according to the information received by the OpenFlow switch, where the matching information command is in the OpenFlow switch. An instruction indicated by the OpenFlow controller after the matching information support capability is negotiated with the OpenFlow controller.

S2. Send the extracted first matching information to the OpenFlow controller.

In an embodiment, the storage medium is further configured to store a computer program for performing the following steps:

S1: After the OpenFlow controller and the OpenFlow switch perform the matching information support capability negotiation, send the matching information instruction to the OpenFlow switch.

S2. The first matching information sent by the OpenFlow switch is received, where the first matching information is extracted by the OpenFlow switch from the received message according to the matching information command, and the received information is received by the OpenFlow switch. Match information corresponding to the message.

In this embodiment, the foregoing storage medium may include, but is not limited to, a Universal Serial Bus flash disk (U disk), a Read-Only Memory (ROM), and a random access memory (Random). One or more media that can store computer programs, such as Access Memory (RAM), removable hard disk, disk, or optical disk.

FIG. 12 is a structural block diagram of an electronic device according to an embodiment of the present disclosure. As shown in FIG. 12, an embodiment of the present disclosure further provides an electronic device including a memory 1210 and a processor 1220, where the memory 1210 stores A computer program, the processor 1220, configured to execute a computer program to perform the method of any of the above embodiments.

In an embodiment, the electronic device may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor 1220, and the input/output device is connected to the processor 1220.

In this embodiment, the above processor may be configured to perform the following steps by a computer program:

S2. Send the extracted first matching information to the OpenFlow controller.

In an embodiment, the processor is further configured to perform the following steps by a computer program:

For specific examples in this embodiment, reference may be made to the examples described in the foregoing embodiments and implementation manners, and details are not described herein again.

It will be apparent to those skilled in the art that one or more of the above-described modules or one or more steps of the present disclosure can be implemented by a general-purpose computing device, which can be centralized on a single computing device or distributed across multiple On a network of computing devices, in one embodiment they may be implemented in program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may The steps shown or described are performed in a different order than here, or they are separately fabricated into one or more integrated circuit modules, or a plurality of the modules or steps are fabricated as a single integrated circuit module. The present disclosure is not limited to any particular combination of hardware and software.

Claims

A method for sending packet matching information is applied to an OpenFlow switch, including:

And extracting first matching information corresponding to the packet received by the OpenFlow switch according to the information received by the OpenFlow switch, where the matching information command is in the OpenFlow switch and is open. The instruction indicated by the open flow controller after the flow controller performs the matching of the information support capability;

The extracted first matching information is sent to the open flow controller.
The method according to claim 1, before the first matching information corresponding to the packet received by the OpenFlow switch is extracted from the packet received by the OpenFlow switch according to the matching information command, the method further includes:

The OpenFlow switch performs the matching information support capability negotiation with the OpenFlow controller in the following manner:

Receiving a negotiation request message from the open flow controller, where the negotiation request message is used to request the open flow switch to report the matching information supported by the open flow switch to the open flow controller;

And the matching information supported by the OpenFlow switch is sent to the OpenFlow controller according to the negotiation request message, where the OpenFlow switch supports the sending of the matching information.
The method according to claim 2, after the matching information supported by the OpenFlow switch is sent to the OpenFlow controller according to the Negotiation Request message, and in the Open Flow according to the matching information instruction Before the packet received by the switch extracts the first matching information corresponding to the packet received by the OpenFlow switch, the method further includes:

Receiving a first flow table from the open flow controller, wherein, in a case that the open flow controller supports the sending of the matching information command, the extended first predetermined message of the first flow table carries the match Information instruction

And carrying the matching information instruction in the first predetermined message that is determined to be extended in the first flow table, and in a case where the matching information supported by the OpenFlow switch includes the matching information indicated by the matching information instruction, a second flow table corresponding to the first flow table, wherein the matching information instruction is carried in an extended second predetermined message of the second flow table.
The method of claim 3, before extracting the first matching information corresponding to the packet received by the OpenFlow switch according to the matching information command, further comprising:

And acquiring the matching information instruction from the second predetermined message extended in the second flow table.
The method of claim 3, after receiving the first flow table from the open flow controller, further comprising:

And in case the matching information supported by the OpenFlow switch does not include the matching information indicated by the matching information instruction, the error response message is replied to the OpenFlow controller.
The method of claim 2, after receiving the negotiation request message from the OpenFlow controller, further comprising:

Receiving, by the open flow switch, the first flow table from the open flow controller, where the open flow switch does not support the matching information, where the first flow table does not carry the matching information command;

Extracting second matching information corresponding to the packet according to the first predetermined default processing manner, and sending the second matching information to the OpenFlow controller.
The method according to claim 2, after the matching information supported by the OpenFlow switch is sent to the OpenFlow controller according to the negotiation request message, and the OpenFlow switch is extracted according to the matching information instruction. Before the first matching information corresponding to the received packet, the method further includes:

Receiving a first flow table from the open flow controller, where the first flow table does not carry the matching information command if the open flow controller does not support the sending of the matching information command;

If it is determined that the matching information instruction is not carried in the first flow table, extracting third matching information corresponding to the packet according to a second predetermined default processing manner, and sending the third matching information to The open flow controller.
A method for receiving message matching information is applied to an open flow controller, including:

After the open flow controller and the open flow switch perform the matching information support capability negotiation, send the matching information instruction to the open flow switch;

And receiving the first matching information sent by the OpenFlow switch, where the first matching information is extracted by the OpenFlow switch from the received message according to the matching information instruction, and the received packet is received by the OpenFlow switch. Corresponding matching information.
The method of claim 8, wherein the OpenFlow controller and the OpenFlow switch perform matching information support capability negotiation, including:

Sending a negotiation request message to the OpenFlow switch, where the negotiation request message is used to request the OpenFlow switch to report the matching information supported by the OpenFlow switch to the OpenFlow controller;

And receiving, in the case that the OpenFlow switch supports the sending of the matching information, the matching information supported by the OpenFlow switch sent by the OpenFlow switch according to the negotiation request message;

And determining matching information supported by the OpenFlow switch and the OpenFlow controller according to the matching information supported by the OpenFlow switch and the matching information supported by the OpenFlow controller.
The method of claim 9, wherein the transmitting the matching information instruction to the OpenFlow switch comprises:

And sending, by the OpenFlow controller, the first flow table to the OpenFlow switch, where the first flow message of the first flow table carries the matching information command .
The method of claim 10, after the sending the first flow table to the open flow switch, further comprising:

Receiving an error response message from the OpenFlow switch, wherein the error response message is used to indicate that the matching information supported by the OpenFlow switch does not include the matching information indicated by the matching information instruction.
The method of claim 9, after the sending the negotiation request message to the open flow switch, further comprising:

And sending, by the OpenFlow switch, the first flow table to the open flow switch, where the first flow table does not carry the matching information command;

Receiving, by the OpenFlow switch, second matching information that is sent by the OpenFlow switch, where the second matching information is extracted from the received packet by the OpenFlow switch according to a first predetermined default processing manner, and the received Match information corresponding to the message.
The method according to claim 9, determining matching supported by the OpenFlow switch and the OpenFlow controller according to matching information supported by the OpenFlow switch and matching information supported by the OpenFlow controller After the information, it also includes:

And the first flow table is sent to the open flow switch, where the open flow controller does not support the sending of the matching information command, where the first flow table does not carry the matching information command;

Receiving, by the open flow switch, third matching information, where the third matching information is extracted by the OpenFlow switch from the received message according to a second predetermined default processing manner, Match information corresponding to the received message.
A device for sending message matching information, which is applied to an open flow switch, and includes:

An extraction module, configured to extract, according to the matching information instruction, the first matching information corresponding to the packet received by the OpenFlow switch, where the matching information command is in the message received by the OpenFlow switch The instruction indicated by the open flow controller after the open flow switch and the open flow controller perform the matching information support capability negotiation;

And a sending module, configured to send the extracted first matching information to the OpenFlow controller.
The apparatus of claim 14 further comprising:

The negotiation module is configured to perform the matching information support capability negotiation with the OpenFlow controller in the following manner before extracting the first matching information corresponding to the packet received by the OpenFlow switch according to the matching information command:

Receiving a negotiation request message from the open flow controller, where the negotiation request message is used to request the open flow switch to report the matching information supported by the open flow switch to the open flow controller;

And the matching information supported by the OpenFlow switch is sent to the OpenFlow controller according to the negotiation request message, where the OpenFlow switch supports the sending of the matching information.
A device for receiving message matching information, which is applied to an open flow controller, and includes:

a sending module, configured to send a matching information instruction to the OpenFlow switch after the OpenFlow controller and the OpenFlow switch perform the matching information support capability negotiation;

a receiving module, configured to receive first matching information sent by the OpenFlow switch, where the first matching information is extracted by the OpenFlow switch from the received message according to the matching information instruction Match information corresponding to the received message.
The apparatus of claim 16 further comprising:

The negotiation module is configured to perform matching information support capability negotiation with the OpenFlow switch in the following manner before sending the matching information command to the OpenFlow switch:

Sending a negotiation request message to the open flow switch, where the negotiation request message is used to request the open flow switch to report the matching information supported by the open flow switch to the open flow controller;

And receiving, in the case that the OpenFlow switch supports the sending of the matching information, the matching information supported by the OpenFlow switch sent by the OpenFlow switch according to the negotiation request message;

And determining matching information supported by the OpenFlow switch and the OpenFlow controller according to the matching information supported by the OpenFlow switch and the matching information supported by the OpenFlow controller.
A storage medium having stored therein a computer program, wherein the computer program is configured to execute the method of any one of claims 1 to 7 at runtime or to perform the claim 8 The method of any of the preceding claims.
An electronic device comprising a memory and a processor, wherein the memory stores a computer program, the processor being arranged to execute the computer program to perform the method of any one of claims 1 to 7, Or the method according to any one of claims 8 to 13.