CN104935526B - A kind of application and identification method and equipment - Google Patents
A kind of application and identification method and equipment Download PDFInfo
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- CN104935526B CN104935526B CN201510320497.XA CN201510320497A CN104935526B CN 104935526 B CN104935526 B CN 104935526B CN 201510320497 A CN201510320497 A CN 201510320497A CN 104935526 B CN104935526 B CN 104935526B
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Abstract
This application discloses a kind of application know method for distinguishing, the method be applied to include controller and forwarding unit application identification system, the method includes：The controller receives the data message sent on the forwarding unit；The controller determines whether that the forwarding unit issues the flow table that overmatching item matches with the data message；If the controller determination issued the flow table to the forwarding unit, the controller determines the corresponding application of the data message；The controller sends the first modification message to the forwarding unit.
Description
Technical Field
The present application relates to the field of network technologies, and in particular, to an application identification method and device.
Background
The birth of a new network switching model OpenFlow protocol brings new technical support to an SDN (Software defined network). The idea of the OpenFlow protocol to implement isolated deployment of the control platform and the forwarding platform provides a promising implementation scheme of a cloud computing network for SDN.
In the process of implementing the present application, the inventor finds that the prior art has at least the following problems:
the prior art scheme is DPI (deep packet instruction, deep packet identification) application identification under a traditional network model, and the prior art implements the scheme of application identification to identify which application a packet is specifically for and then forward the packet, which may cause an increase in data packet forwarding delay.
Disclosure of Invention
The application provides an application identification method, which is characterized in that the method is applied to an application identification system comprising a controller and a forwarding device, and the method comprises the following steps:
the controller receives the data message sent by the forwarding equipment;
the controller determines whether a flow table with a matching item matched with the data message is issued to the forwarding device, wherein the action item in the flow table comprises: a sending command used for instructing the forwarding device to send the data message matched with the matching item of the flow table;
if the controller determines that the flow table is issued to the forwarding device, the controller determines an application corresponding to the data message;
the controller sends a first modification message to the forwarding device, where the first modification message is used to instruct the forwarding device to modify the upload command included in the action item in the flow table into an identifier of an application corresponding to the data message.
A controller device, the device being applied to an application recognition system comprising a controller and a forwarding device, the device comprising:
a receiving module, configured to receive a data packet sent by the forwarding device;
a first determining module, configured to determine whether a flow table in which a matching item matches the data packet received by the receiving module is issued to the forwarding device, where an action item in the flow table includes: a sending command used for instructing the forwarding device to send the data message matched with the matching item of the flow table;
a second determining module, configured to determine an application corresponding to the data packet if the first determining module determines that the flow table has been issued to the forwarding device;
a first sending module, configured to send a first modification packet to the forwarding device, where the first modification packet is used to instruct the forwarding device to modify the upload command included in the action item in the flow table into an identifier of an application corresponding to the data packet.
According to the application identification method provided by the application, the controller performs application identification on the data message sent by the forwarding device to determine the application corresponding to the data message, and after the application corresponding to the data message is determined, the action item in the flow table comprises the identifier of the application corresponding to the data message by modifying the flow table which is issued to the forwarding device and is matched with the data message, so that when the forwarding device receives the data message matched with the matching item of the flow table in the subsequent process, the application corresponding to the data message can be determined according to the flow table. In the method, the application identification and the message forwarding are two independent processes, so that the data message does not need to be analyzed and then forwarded, and the data message forwarding time delay can be reduced.
Drawings
In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings needed to be used in the description of the present application or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of an application identification method in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a controller in an embodiment of the present application.
Detailed Description
The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are some, not all embodiments of the present application. Other embodiments, which can be derived from the embodiments given herein by those skilled in the art, are within the scope of the present disclosure.
As shown in fig. 1, a flowchart of an application identification method applied to an application identification system including a controller and a forwarding device in an Open Flow protocol scenario in the embodiment of the present application is shown, where the method includes the following steps:
step 101, the controller receives a data packet sent by the forwarding device.
Specifically, after receiving the data packet, the forwarding device searches whether a local matching item and a flow table matched with the data packet exist, if so, and the action item of the flow table includes an uploading command for instructing the forwarding device to upload the data packet matched with the matching item of the flow table, the forwarding device uploads the data packet to the controller, and in addition, the forwarding device can also forward the data packet through an egress port according to the egress port included in the action item of the flow table; and if not, the forwarding equipment sends the data message to the controller.
And step 102, the controller determines whether a flow table with matching items matched with the data messages is issued to the forwarding equipment.
And the action item of the flow table comprises an uploading command for indicating the forwarding equipment to upload the data message matched with the matching item of the flow table. For convenience of description, this flow table will be referred to as an initial flow table in the following in this example.
If the controller determines that the initial flow table has been issued to the forwarding device, step 104 and step 105 are performed, and if the controller determines that the initial flow table has not been issued to the forwarding device, step 103, step 104 and step 105 are performed.
Step 103, the controller issues a flow table (i.e. an initial flow table) to the forwarding device.
Specifically, when the controller determines that an initial flow table is not issued to the forwarding device according to the data packet, the controller analyzes the received data packet, and generates an initial flow table corresponding to the data packet according to information such as a Protocol type destination IP (Internet Protocol) address, a source IP address, a source port, and a destination port of the data packet obtained through analysis. Wherein the action items of the initial flow table at least include: an uploading command for instructing the forwarding device to upload a data message matched with the matching item of the initial flow table and an output port for instructing the forwarding device to forward the data message matched with the matching item of the flow table; the matching entries of the initial flow table include at least: a destination IP address and a source IP address of the data message.
After the forwarding device receives the initial flow table, if the forwarding device receives the data message matched with the matching item of the initial flow table, the forwarding device forwards and uploads the data message to the controller according to the action item of the initial flow table.
And 104, the controller determines the application corresponding to the data message.
The controller determines that the application corresponding to the data message is specifically:
the controller determines the application corresponding to the data message by analyzing the data message;
or,
the controller sends the data message to application identification equipment in the application identification system so that the application identification equipment identifies the application corresponding to the data message and sends an identification result to the controller; and the controller determines the application corresponding to the data message according to the identification result sent by the application identification equipment.
The process of application identification of the data message by the controller or the application identification device is the same as that in the prior art, and is not described herein again.
Step 105, the controller sends a first modification packet to the forwarding device.
The first modification message is used for instructing the forwarding device to modify the uploading command included in the action item in the initial flow table into the identifier of the application corresponding to the data message.
And after receiving the first modification message, the forwarding device modifies the uploading command in the action item of the initial flow table into the application identifier corresponding to the data message determined by the controller according to the indication of the first modification message. For convenience of description, the initial flow table modified according to the first modification packet is referred to as a first flow table in the following.
After receiving the data packet matched with the matching item of the first flow table, the forwarding device may determine, according to the identifier of the application included in the action item of the first flow table, the application corresponding to the data packet, and forward the data packet according to the egress port in the action item of the first flow table.
In an example, if the controller does not determine the application corresponding to the data packet and determines that the number of the data packets that are uploaded by the forwarding device and matched with the initial flow table is not less than a preset uploading number threshold, the controller sends a second modification packet to the forwarding device, where the second modification packet is used to instruct the forwarding device to modify the uploading command included in the action item in the initial flow table into an application-unidentified identifier.
Specifically, the controller may also preset a sending number threshold for the data packet, and when the controller does not determine the application corresponding to the data packet sent on the forwarding device and matching with the matching item of the initial flow table, the controller determines the number of the data packet sent on the forwarding device and matching with the matching item of the initial flow table, and if the sending number is smaller than the preset sending number threshold, the controller may further continue to determine the application corresponding to the subsequently received data packet sent on the forwarding device and matching with the matching item of the initial flow table, so that the second modified packet is not sent at this time; if the number of the uploaded data messages is not less than the preset number threshold value of the uploaded data messages, the controller is indicated to not determine the application corresponding to the subsequently received data messages which are uploaded by the forwarding device and matched with the matching item of the initial flow table, and therefore the controller sends a second modification message to the forwarding device.
And after receiving the second modification message, the forwarding device modifies the uploading command included in the action item in the initial flow table into an application unidentified identifier according to the indication of the second modification message. For convenience of description, the initial flow table modified according to the second modification packet is referred to as a second flow table in the following.
When the forwarding device receives the data packet matched with the matching item of the second flow table, it may determine that the application corresponding to the data packet cannot be recognized according to the application unidentified identifier included in the action item of the second flow table, and forward the data packet according to the egress port in the action item of the second flow table.
In one example, the controller may determine that the number of data packets that have been uploaded by the forwarding device and match the initial flow table is not less than a preset uploading number threshold, which may be implemented by using a counter.
Specifically, when the controller generates an initial flow table, a counter is configured for the initial flow table, and an initial count value of the counter is a preset uploading number threshold. And when the controller receives a data message matched with the matching item of the initial flow table, subtracting 1 from the count value of the counter corresponding to the initial flow table. And when the count value of the counter corresponding to the initial flow table is equal to 0, determining that the number of the data messages which are uploaded by the forwarding equipment and matched with the initial flow table is not less than a preset uploading number threshold value.
In an example, when determining the application corresponding to the data packet, the controller may determine not only the network application program corresponding to the data packet, but also the application corresponding to the data packet at the transmission layer and the application corresponding to the application layer, and the first modification packet issued by the controller may be further used to instruct the forwarding device to modify the upload command in the initial flow table into the identifier of the network application program corresponding to the data packet, the identifier of the application corresponding to the data packet at the transmission layer, and the identifier of the application corresponding to the data packet at the application layer.
If the controller determines the network application program corresponding to the data packet, and does not determine the application of the data packet corresponding to the application layer, and determines the application of the data packet corresponding to the transmission layer, the first modification packet issued by the controller may be further used to instruct the forwarding device to modify the upload command in the initial flow table into the identifier of the network application program corresponding to the data packet, the identifier of the application of the data packet corresponding to the transmission layer, and the identifier of the application of the data packet corresponding to the application layer that is not recognized.
If the controller does not determine the network application program corresponding to the data message, determines the application of the data message corresponding to the transmission layer and the application corresponding to the application layer, and determines that the number of the data messages which are uploaded by the forwarding device and are matched with the initial flow table is not less than the preset uploading number threshold, the second modification message issued by the controller can be further used for instructing the forwarding device to modify the uploading command in the initial flow table into an identifier which is not recognized by the network application program, an identifier of the application of the data message corresponding to the transmission layer, and an identifier of the application of the data message corresponding to the application layer.
If the controller does not determine the network application program corresponding to the data message, does not determine the application of the data message corresponding to the application layer, determines the application of the data message corresponding to the transmission layer, and determines that the number of the data messages which are uploaded by the forwarding device and are matched with the initial flow table is not less than the preset uploading number threshold, the second modification message issued by the controller can be further used for instructing the forwarding device to modify the uploading command in the initial flow table into an identifier which is not recognized by the network application program, an identifier of the application of the data message corresponding to the transmission layer, and an identifier which is not recognized by the application of the data message corresponding to the application layer.
In one example, the controller sets an aging time when each flow table is generated, and when the flow table reaches the aging time, the controller sends a deletion message to the forwarding device, where the deletion message is used to instruct the forwarding device to delete the flow table reaching the aging time.
According to the application identification method provided by the application, the controller performs application identification on the data message sent by the forwarding device to determine the application corresponding to the data message, and after the application corresponding to the data message is determined, the action item in the flow table comprises the identifier of the application corresponding to the data message by modifying the flow table which is issued to the forwarding device and is matched with the data message, so that when the forwarding device receives the data message matched with the matching item of the flow table in the subsequent process, the application corresponding to the data message can be determined according to the flow table. In the method, the application identification and the message forwarding are two independent processes, so that the data message does not need to be analyzed and then forwarded, and the data message forwarding time delay can be reduced.
Based on the same application concept as the method, the application also provides a controller device, which is applied to an application identification system comprising a controller and a forwarding device, as shown in fig. 2, and comprises:
a receiving module 21, configured to receive a data packet sent by the forwarding device;
a first determining module 22, configured to determine whether a flow table matching the matching entry with the data packet received by the receiving module is issued to the forwarding device.
The action items in the flow table include: a sending command used for instructing the forwarding device to send the data message matched with the matching item of the flow table;
a second determining module 23, configured to determine, if the first determining module determines that the flow table has been issued to the forwarding device, an application corresponding to the data packet;
a first sending module 24, configured to send the first modification packet to the forwarding device.
The first modification message is used for instructing the forwarding device to modify the uploading command included in the action item in the flow table into an identifier of an application corresponding to the data message.
The apparatus further comprises:
the second sending module is used for sending the flow table to the forwarding equipment if the first determining module determines that the flow table is not sent to the forwarding equipment;
the second determining module determines the application corresponding to the data message;
and the first sending module sends the first modification message to the forwarding equipment.
The apparatus further comprises:
and a second sending module, configured to send a second modification packet to the forwarding device if the second determining module does not determine the application corresponding to the data packet and determines that the number of the data packets that have been uploaded by the forwarding device and are matched with the flow table is not less than a preset uploading number threshold, where the second modification packet is used to instruct the forwarding device to modify the uploading command included in the action item in the flow table into an application-unidentified identifier.
The second determining module is specifically configured to:
determining an application corresponding to the data message by analyzing the data message;
or,
sending the data message to application identification equipment in the application identification system so that the application identification equipment identifies the application corresponding to the data message and sends an identification result to the controller;
and determining the application corresponding to the data message according to the identification result sent by the application identification equipment.
The apparatus further comprises:
and the deleting module is used for sending a deleting message to the forwarding equipment when the flow table reaches the aging time, wherein the deleting message is used for indicating the forwarding equipment to delete the flow table reaching the aging time.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application may be substantially or partially embodied in the form of a software product stored in a storage medium, and including instructions for causing a terminal device (which may be a mobile phone, a personal computer, a server, or a network device) to execute the method according to the embodiments of the present application.
The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be considered to be within the protection scope of the present application.
Those skilled in the art will appreciate that the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, and may be correspondingly changed in one or more devices different from the embodiments. The modules of the above embodiments may be integrated into one body, or may be separately deployed; the sub-modules can be combined into one module, or can be further split into a plurality of sub-modules. The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
The disclosure of the present application is only a few specific embodiments, but the present application is not limited to these, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present application.
Claims (10)
1. An application identification method applied to an application identification system comprising a controller and a forwarding device, the method comprising:
the controller receives the data message sent by the forwarding equipment;
the controller determines whether a flow table with a matching item matched with the data message is issued to the forwarding device, wherein the action item in the flow table comprises: a sending command used for instructing the forwarding device to send the data message matched with the matching item of the flow table;
if the controller determines that the flow table is issued to the forwarding device, the controller determines an application corresponding to the data message;
the controller sends a first modification message to the forwarding device, where the first modification message is used to instruct the forwarding device to modify the upload command included in the action item in the flow table into an identifier of an application corresponding to the data message.
2. The method of claim 1, wherein the method further comprises:
if the controller determines that the flow table is not issued to the forwarding device, the controller issues the flow table to the forwarding device;
the controller determines an application corresponding to the data message;
and the controller sends the first modification message to the forwarding equipment.
3. The method of claim 1 or 2, wherein the method further comprises:
if the controller does not determine the application corresponding to the data message and determines that the number of the data messages which are uploaded by the forwarding device and matched with the flow table is not smaller than a preset uploading number threshold value, the controller sends a second modification message to the forwarding device, wherein the second modification message is used for indicating the forwarding device to modify the uploading command included in the action item in the flow table into an application unidentified identifier.
4. The method according to claim 1 or 2, wherein the controller determines that the application corresponding to the data packet is specifically:
the controller determines the application corresponding to the data message by analyzing the data message;
or,
the controller sends the data message to application identification equipment in the application identification system so that the application identification equipment identifies the application corresponding to the data message and sends an identification result to the controller;
and the controller determines the application corresponding to the data message according to the identification result sent by the application identification equipment.
5. The method of claim 1 or 2, wherein the method further comprises:
when the flow table reaches the aging time, the controller sends a deletion message to the forwarding device, wherein the deletion message is used for indicating the forwarding device to delete the flow table reaching the aging time.
6. A controller device, characterized in that the device is applied to an application recognition system comprising a controller and a forwarding device, the device comprising:
a receiving module, configured to receive a data packet sent by the forwarding device;
a first determining module, configured to determine whether a flow table in which a matching item matches the data packet received by the receiving module is issued to the forwarding device, where an action item in the flow table includes: a sending command used for instructing the forwarding device to send the data message matched with the matching item of the flow table;
a second determining module, configured to determine an application corresponding to the data packet if the first determining module determines that the flow table has been issued to the forwarding device;
a first sending module, configured to send a first modification packet to the forwarding device, where the first modification packet is used to instruct the forwarding device to modify the upload command included in the action item in the flow table into an identifier of an application corresponding to the data packet.
7. The apparatus of claim 6, wherein the apparatus further comprises:
the second sending module is used for sending the flow table to the forwarding equipment if the first determining module determines that the flow table is not sent to the forwarding equipment;
the second determining module determines the application corresponding to the data message;
and the first sending module sends the first modification message to the forwarding equipment.
8. The apparatus of claim 6 or 7, wherein the apparatus further comprises:
and a second sending module, configured to send a second modification packet to the forwarding device if the second determining module does not determine the application corresponding to the data packet and determines that the number of the data packets that have been uploaded by the forwarding device and are matched with the flow table is not less than a preset uploading number threshold, where the second modification packet is used to instruct the forwarding device to modify the uploading command included in the action item in the flow table into an application-unidentified identifier.
9. The device according to claim 6 or 7, wherein the second determining module is specifically configured to:
determining an application corresponding to the data message by analyzing the data message;
or,
sending the data message to application identification equipment in the application identification system so that the application identification equipment identifies the application corresponding to the data message and sends an identification result to the controller;
and determining the application corresponding to the data message according to the identification result sent by the application identification equipment.
10. The apparatus of claim 6 or 7, wherein the apparatus further comprises:
and the deleting module is used for sending a deleting message to the forwarding equipment when the flow table reaches the aging time, wherein the deleting message is used for indicating the forwarding equipment to delete the flow table reaching the aging time.
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| CN201510320497.XA CN104935526B (en) | 2015-06-11 | 2015-06-11 | A kind of application and identification method and equipment |
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| CN201510320497.XA CN104935526B (en) | 2015-06-11 | 2015-06-11 | A kind of application and identification method and equipment |
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| US20150120828A1 (en) * | 2013-10-29 | 2015-04-30 | International Business Machines Corporation | Recalling activities during communication sessions |
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| CN1741504A (en) * | 2005-08-29 | 2006-03-01 | 杭州华为三康技术有限公司 | Flow controlling method based on application and network equipment for making applied flow control |
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Applicant after: Xinhua three Technology Co., Ltd. Address before: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Applicant before: Huasan Communication Technology Co., Ltd. |
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