WO2017101693A1 - 一种基于Skype不同功能通信流的识别方法及装置 - Google Patents

一种基于Skype不同功能通信流的识别方法及装置 Download PDF

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Publication number
WO2017101693A1
WO2017101693A1 PCT/CN2016/108441 CN2016108441W WO2017101693A1 WO 2017101693 A1 WO2017101693 A1 WO 2017101693A1 CN 2016108441 W CN2016108441 W CN 2016108441W WO 2017101693 A1 WO2017101693 A1 WO 2017101693A1
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detection
transmission
transmission message
skype
current session
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PCT/CN2016/108441
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English (en)
French (fr)
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徐牧池
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北京神州绿盟信息安全科技股份有限公司
北京神州绿盟科技有限公司
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Priority to US16/060,002 priority Critical patent/US20180367461A1/en
Priority to JP2018531242A priority patent/JP2018537921A/ja
Publication of WO2017101693A1 publication Critical patent/WO2017101693A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H04L67/146—Markers for unambiguous identification of a particular session, e.g. session cookie or URL-encoding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2483—Traffic characterised by specific attributes, e.g. priority or QoS involving identification of individual flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0896—Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/02—Capturing of monitoring data
    • H04L43/028—Capturing of monitoring data by filtering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2475—Traffic characterised by specific attributes, e.g. priority or QoS for supporting traffic characterised by the type of applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/21—Monitoring or handling of messages
    • H04L51/212—Monitoring or handling of messages using filtering or selective blocking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
    • H04L63/0227—Filtering policies
    • H04L63/0245—Filtering by information in the payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
    • H04L63/1408—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic by monitoring network traffic
    • H04L63/1416—Event detection, e.g. attack signature detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H04L65/401—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference
    • H04L65/4015—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference where at least one of the additional parallel sessions is real time or time sensitive, e.g. white board sharing, collaboration or spawning of a subconference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/75—Media network packet handling
    • H04L65/765—Media network packet handling intermediate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/07—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail characterised by the inclusion of specific contents
    • H04L51/10—Multimedia information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/104—Peer-to-peer [P2P] networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/535—Tracking the activity of the user

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for identifying a communication stream based on different functions of Skype.
  • Skype is one of the most popular instant messaging software in the world. It can talk to other users for free and clearly, and can also make domestic and international calls. Skype mainly uses p2p (peer to peer) network architecture and private protocol communication, and also strongly encrypts data, and Skype's communication process is very complicated and the amount of code is very large, so it is difficult to reverse it through reverse work. Source code analysis, so far the recognition of Skype is still in the stage of simple identification.
  • existing identification technologies can limit the use of all Skype functions by identifying the Skype login process, or identify some of the traffic of the Skype feature, such as the traffic flow generated by certain features of Skype. The part of the traffic is identified, and if the set traffic threshold is exceeded, the partial traffic is partially restricted.
  • Skype's single functions such as text chat, file transfer, etc.
  • the existing identification technology can not be fully recognized, because the main functions of Skype have a large degree of coupling in the communication process, the existing identification Technology is difficult to distinguish, so it is not possible to limit the flow of Skype's single function.
  • the existing identification technology cannot identify the more coupled traffic in the Skype function communication flow, so the single function of Skype cannot be recognized, which makes it impossible to finely limit the common functions of Skype.
  • the embodiment of the invention provides a method and a device for identifying a communication flow based on Skype different functions, which are used to solve the problem that the existing identification technology cannot identify the traffic with large coupling in the Skype function communication flow, and thus cannot be single to Skype.
  • the function is identified, which leads to the inability to fine-tune the common functions of Skype.
  • a method for identifying a communication flow based on different functions of Skype comprising:
  • the method further includes:
  • a current limiting operation is performed on the current session that has been tagged with a corresponding function application tag.
  • the performing the initial detection of the transmission packet includes:
  • the transmission packet is initially detected by using DPI (Deep Packet Inspection) technology and DFI (Deep/Dynamic Flow Inspection) technology.
  • DPI Deep Packet Inspection
  • DFI Deep/Dynamic Flow Inspection
  • the determining, by the determining, the detection level to which the transmission packet belongs includes:
  • Determining a value P corresponding to the location of the transmission message in the current session and pre-planning The detection level of the points determines the detection level to which the transmission message belongs.
  • the value range corresponding to the location of the transmission message of the Skype session detection layer in the current session is 0-P1
  • the value range corresponding to the location of the transmission message of the text transmission detection layer in the current session For P1-P2, the value range of the transmission message of the file transmission detection layer in the current session is P3-P4, and the position of the transmission message of the voice video detection layer in the current session corresponds to The value range is P5-P6, and 0 ⁇ P1 ⁇ P2, P2 ⁇ P3 ⁇ P4, P2 ⁇ P5 ⁇ P6.
  • a fifth possible implementation manner of the first aspect when determining that the detection level to which the transmission message belongs is the suspected Skype session detection layer, the detecting the transmission message according to the detection rule corresponding to the detection level to which the transmission message belongs, including:
  • the Skype feature includes:
  • Session port packet length, packet flow at a specific location, or application layer load.
  • the detection packet when determining that the detection level to which the transmission message belongs is the text transmission detection layer and the current When the session has been marked with the Skype session application tag, the detection packet is detected according to the detection rule corresponding to the detection level to which the transmission message belongs, including:
  • the detection packet when determining that the detection level to which the transmission message belongs is the file transmission detection layer and the current When the session has been tagged with the text transmission function, the detection packet is detected according to the detection rule corresponding to the detection level to which the transmission message belongs, including:
  • the detection packet when determining that the detection level to which the transmission message belongs is the voice video detection layer and the current When the session has been tagged with the text transmission function, the detection packet is detected according to the detection rule corresponding to the detection level to which the transmission message belongs, including:
  • an identification device based on different functional communication streams of Skype comprising:
  • An obtaining unit configured to acquire a transmission message in the current session
  • a processing unit configured to perform a preliminary detection on the transmission packet obtained by the acquiring unit, and if the transmission message is accurately identified, apply a label to a corresponding function on the current session; if the transmission message is If the detection is not accurately identified, the detection level to which the transmission message belongs is determined, and the transmission message is detected according to the detection rule corresponding to the detection level to which the transmission message belongs, and when the detection condition is met, And marking, by the current session, a function application label corresponding to a detection level to which the transport message belongs.
  • the apparatus further includes a current limiting unit:
  • the current limiting unit is configured to perform a current limiting operation on the current session that has been tagged with a corresponding function application tag.
  • the processing unit is specifically configured to perform preliminary detection on the transmission packet by using a DPI technology and a DFI technology.
  • the processing unit is specifically configured to determine a value P corresponding to the location of the obtained transmission message in the current session,
  • the P is a positive integer
  • the detection level to which the transmission message belongs is determined according to the value P corresponding to the location of the transmission message in the current session and the pre-defined detection level.
  • the value range corresponding to the location of the transmission message of the Skype session detection layer in the current session is 0-P1
  • the value range corresponding to the location of the transmission message of the text transmission detection layer in the current session For P1-P2, the value range of the transmission message of the file transmission detection layer in the current session is P3-P4, and the position of the transmission message of the voice video detection layer in the current session corresponds to The value range is P5-P6, and 0 ⁇ P1 ⁇ P2, P2 ⁇ P3 ⁇ P4, P2 ⁇ P5 ⁇ P6.
  • the processing unit is configured to: when determining that the detection level to which the transmission packet belongs is When the Skype session detection layer is suspected and the current session is not marked with the corresponding function application tag, the Skype feature detection is performed on the transmission message.
  • the Skype feature includes:
  • Session port packet length, packet flow at a specific location, or application layer load.
  • the processing unit is configured to: when determining that the detection level to which the transmission message belongs is When the text transmission detection layer and the current session have been marked with a suspected Skype session application tag, the transmission message is subjected to traffic and Skype text transmission feature detection.
  • the processing unit is configured to: when determining that the detection level to which the transmission message belongs is When the file transmission detection layer and the current session have been marked with the text transmission function application label, the transmission message is subjected to traffic and Skype file transmission feature detection.
  • the processing unit is configured to: when determining that a detection level to which the transmission message belongs is When the voice video detection layer and the current session have been marked with the text transmission function application tag, the transmission message is subjected to traffic and Skype audio and video feature detection.
  • the packet transmitted in the current session can be obtained, and Performing a preliminary detection on the transmission message, if the transmission message is accurately identified, applying a label to the corresponding function on the current session, otherwise determining a detection level to which the transmission message belongs, and according to the The detection rule corresponding to the detection level to which the transmission message belongs is detected by the detection rule, and when the detection condition is met, the function corresponding to the detection level to which the transmission message belongs belongs to the current session mark label. That is to say, in the technical solution described in the embodiment of the present invention, the problem that the coupled traffic cannot be distinguished is solved by incremental identification, thereby being able to identify a single function of Skype, and complete fine access control of the Skype traffic. In turn, it can block the specified functions of Skype, improve network bandwidth, and optimize the office environment.
  • FIG. 1 is a schematic flowchart diagram of a method for identifying a communication flow based on different functions of Skype according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic flowchart of a method for identifying a communication flow based on different functions of Skype according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic structural diagram of an apparatus for identifying a communication flow based on different functions of Skype according to Embodiment 2 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a first embodiment of the present invention provides a method for identifying a communication flow based on different functions of Skype, as shown in FIG. 1 , which is a schematic flowchart of a method for identifying a communication flow based on different functions of Skype according to the first embodiment of the present invention.
  • the method can include the following steps:
  • Step 101 Acquire a transmission message in the current session.
  • Step 102 Perform a preliminary detection on the transmission message, and if the transmission message is accurately identified, apply a label to the corresponding function on the current session; if the transmission message is not accurately identified, determine The detection level to which the transmission message belongs.
  • Step 103 Detect the transmission message according to the detection rule corresponding to the detection level to which the transmission message belongs, and when the detection condition is met, mark the detection of the transmission message on the current session mark.
  • the function corresponding to the level applies the label.
  • the problem that the coupled traffic cannot be distinguished is solved by incremental identification, thereby being able to identify a single function of Skype, and complete fine access control of the Skype traffic. In turn, it can block the specified functions of Skype, improve network bandwidth, and optimize the office environment.
  • step 102 performing preliminary detection on the transmission packet may be specifically implemented as:
  • the transmission message is initially detected by using DPI technology and DFI technology.
  • DPI technology can accurately identify the uncoupled Skype traffic, so as to apply the label to the corresponding function of the accurately identified session mark, and then the session will not be performed again. Further detection operations, ie, sessions corresponding to uncoupled Skype traffic, can be detected at this step.
  • determining a detection level to which the transmission message belongs may be specifically implemented as:
  • Determining a value P corresponding to the location of the transmission message in the current session and pre-planning The detection level of the points determines the detection level to which the transmission message belongs.
  • the detection level at least includes:
  • the value range corresponding to the location of the transmission message of the Skype session detection layer in the current session is 0-P1
  • the value range corresponding to the location of the transmission message of the text transmission detection layer in the current session For P1-P2, the value range of the transmission message of the file transmission detection layer in the current session is P3-P4, and the position of the transmission message of the voice video detection layer in the current session corresponds to The value range is P5-P6, and 0 ⁇ P1 ⁇ P2, P2 ⁇ P3 ⁇ P4, P2 ⁇ P5 ⁇ P6.
  • the detection level of the Skype may be divided according to the traffic characteristic analysis of the transmission message and the comprehensive processing of the experience value, and After the Skype detection level is divided, the statistical threshold corresponding to the traffic in each detection level may be determined, that is, the preset traffic statistics threshold corresponding to the suspected Skype session detection layer, and the first preset traffic statistics corresponding to the text transmission detection layer.
  • the threshold, the second preset traffic statistics threshold corresponding to the file transmission detection layer, and the third preset traffic statistics threshold corresponding to the voice and video detection layer are not performed.
  • the default traffic statistics threshold corresponding to the Skype session detection layer is usually zero, and the calculation of the remaining preset traffic statistics thresholds is also performed on the traffic.
  • the feature analysis and the comprehensive processing of the empirical value are obtained, and the embodiment of the present invention does not describe this.
  • the transmission report is The detection rule corresponding to the detection level to which the file belongs is detected by the detection rule, and may be specifically implemented as:
  • the Skype feature detection is performed on the transmission message, if the transmission message satisfies the Skype feature, the current session corresponding to the transmission message is marked with a suspected Skype session application tag.
  • the process ends.
  • the detection process maintains the detection results of the current session by the DPI technology and the DFI technology in the preliminary detection.
  • the Skype feature may include at least a session port, a packet length, a specific location packet flow or an application layer load, and the like.
  • the current session corresponding to the transmission message may be marked with a suspected Skype session application tag.
  • step 103 when it is determined that the detection level to which the transmission message belongs is the text transmission detection layer and the current session has been marked with a suspected Skype session application label, the transmission message is according to the transmission message.
  • the detection rule corresponding to the detected detection level detects the transmission packet, and may be specifically implemented as:
  • the traffic of the transmission message and the detection of the Skype text transmission feature may be specifically implemented as:
  • the Skype text transmission feature in the first part of the message is Skype text transmission corresponding to the text transmission detection layer If the features match, the current session corresponding to the transmission message is Mark the text transfer function to apply the label.
  • the detection level to which the transmission message belongs is the text transmission detection layer
  • the current session corresponding to the transmission message is not marked with a suspected Skype session application label
  • the end is ended.
  • the detection process maintains the detection result of the suspected Skype session detection layer.
  • the traffic detection in order to make the detection of the character transmission detection layer faster, in the detection of the layer, in addition to the traffic detection and the Skype text transmission feature detection, only the traffic detection can be performed on the transmission message. That is, if it is determined that the traffic statistics value of the first part of the packet is not less than the first preset traffic statistics threshold, the current session label corresponding to the transmission message may be directly applied to the text transmission function application label. This embodiment of the present invention does not describe this.
  • step 103 when it is determined that the detection level to which the transmission message belongs is the file transmission detection layer, and the current session corresponding to the transmission message has been marked with a text transmission function application label, And detecting, by using the detection rule corresponding to the detection level to which the transmission packet belongs, the specific implementation is:
  • performing traffic detection on the transport packet and detecting the Skype file transmission feature may be specifically implemented as:
  • the Skype file transmission feature in the second part of the packet is Skype corresponding to the file transmission detection layer If the file transmission characteristics are matched, the current session label corresponding to the transmission message is marked with a file transmission function application label;
  • the Skype file transmission feature in the second part of the message does not match the Skype file transmission feature corresponding to the file transmission detection layer, and determines that the detection level to which the transmission message belongs is the voice and video detection layer. Extracting Skype audio and video features in the second part of the message, and performing corresponding Skype audio and video feature detection, when the Skype audio and video features in the second part of the message and the Skype sound corresponding to the voice and video detection layer When the video features match, the current session corresponding to the transmission message is marked with a voice video function application tag.
  • the function application label of the current session corresponding to the transmission message may be updated, that is, the corresponding message corresponding to the transmission message.
  • the text transmission function application label marked by the upper layer text transmission detection layer is updated to the file transmission function application label.
  • the second preset traffic statistics threshold may continue to determine whether the detection level to which the transmission message belongs is a voice and video detection layer, and if so, the related audio and video features may be detected, and when the detection condition is met, the The function application label of the current session corresponding to the transmission message is that the current session corresponding to the transmission message is updated in the text transmission function application label marked by the upper layer text transmission detection layer to the voice video function application label.
  • the current detection process is terminated. For example, if it is determined that the detection level to which the transmission message belongs is the file transmission detection layer, but the transmission report If the current session corresponding to the text is not marked with the text transmission function application label, the current detection process is terminated, and the detection result of the text transmission detection layer is maintained.
  • the traffic detection can be performed only on the transmission packet. That is, if it is determined that the traffic statistics value of the second part of the packet is not less than the second preset traffic statistics threshold, the file transfer function of the current session corresponding to the transport packet may be directly applied. label;
  • the traffic statistics of the second packet is smaller than the second preset traffic statistics threshold and the detection level to which the transport packet belongs is the voice video detection layer, extracting the second partial report Skype audio and video features in the text, and Skype audio and video feature detection, when the first When the Skype audio and video feature in the two-part message matches the Skype audio and video feature corresponding to the voice video detection layer, the current session corresponding to the transmission message may be tagged with the voice video function application tag.
  • step 103 when it is determined that the detection level to which the transmission message belongs is the voice video detection layer, and the current session has been marked with a text transmission function application label, the transmission message according to the transmission message
  • the detection rule corresponding to the detected detection level detects the transmission packet, and may be specifically implemented as:
  • the traffic of the transmission packet and the detection of the Skype audio and video feature may be specifically implemented as follows:
  • the Skype audio and video feature in the third part of the message is not smaller than the third preset traffic statistics threshold, and the Skype audio and video feature in the third part of the message is corresponding to the voice and video detection layer. If the audio and video features match, the current session corresponding to the transmission message is marked with a voice video function application tag.
  • the function application label of the current session corresponding to the transmission message is updated, that is, the current corresponding to the transmission message.
  • the session is updated with the text transfer function application tag marked in the upper layer text transmission detection layer as a voice video function application tag.
  • the detection process ends. Maintain the detection result of the text transmission detection layer.
  • the layer can detect only the traffic of the transmitted message. Detecting, that is, if it is determined that the traffic statistics of the third packet is not smaller than the third preset traffic statistics threshold, the current session corresponding to the transport packet may be directly marked with a voice and video function. The application of the label is not described in detail in the embodiment of the present invention.
  • the identification method according to the embodiment of the present invention is an incremental identification method.
  • the current detection process is ended, and the upper layer detection result is maintained. That is to say, the technical solution described in the embodiment of the present invention can solve the problem that the coupled traffic cannot be distinguished in the Skype identification process by using the incremental identification method and the DPI technology and the DFI detection method. Achieve fine-grained recognition control of Skype's single function.
  • the method may further include:
  • a current limiting operation is performed on the current session that has been tagged with a corresponding function application tag.
  • the session marked with the corresponding function labeling may be restricted according to the actual needs of the user, for example, in the office environment of the company, the related operations of the session marked with the voice and video function application label may be restricted. Thereby increasing the network bandwidth of the office environment.
  • the first embodiment of the present invention provides a method for identifying a communication flow based on different functions of Skype, and obtains a transmission message in the current session, and performs preliminary detection on the transmission message. If the transmission message is accurately identified, The corresponding function is applied to the current session tag, and the detection level to which the transmission message belongs is determined, and the transmission message is detected according to the detection rule corresponding to the detection level to which the transmission message belongs. And when the detection condition is met, the current session is marked with a function corresponding to the detection level to which the transmission message belongs. That is to say, in the technical solution described in the embodiment of the present invention, the problem that the coupled traffic cannot be distinguished is solved by incremental identification, thereby being able to identify a single function of Skype, and can complete the Skype traffic. Refine access control, which can block the Skype designated functions, improve network bandwidth, and optimize the office environment.
  • the second embodiment of the present invention provides a device for identifying a communication flow based on different functions of the Skype.
  • the identification device refer to the related description in the first embodiment of the foregoing method. The repetitions are not repeated here.
  • FIG. 3 it is a schematic structural diagram of the identification device based on the Skype different function communication flow, and the identification device based on the Skype different function communication flow may specifically include:
  • the obtaining unit 31 is configured to obtain a transmission message in the current session.
  • the processing unit 32 is configured to perform preliminary detection on the transmission message acquired by the obtaining unit 31, and if the transmission message is accurately identified, apply the corresponding function to the current session label; if the transmission If the packet is not accurately identified, the detection level to which the transmission message belongs is determined, and the transmission message is detected according to the detection rule corresponding to the detection level to which the transmission message belongs, and the detection condition is met. And sending, by the current session, a function application label corresponding to the detection level to which the transport message belongs.
  • the apparatus may further include a current limiting unit 33:
  • the current limiting unit 33 is configured to perform a current limiting operation on the current session that has been tagged with a corresponding function application tag.
  • processing unit 32 may be specifically configured to perform preliminary detection on the transmission message by using a DPI technology and a DFI technology.
  • the processing unit 32 may be specifically configured to determine a value P corresponding to the location of the obtained transmission message in the current session, where P is a positive integer, and according to the transmission packet A value P corresponding to the location in the current session and a pre-divided detection level determine a detection level to which the transmission message belongs.
  • the detection level at least includes:
  • the value range corresponding to the location of the transmission message of the Skype session detection layer in the current session is 0-P1
  • the value range corresponding to the location of the transmission message of the text transmission detection layer in the current session For P1-P2, the value range of the transmission message of the file transmission detection layer in the current session is P3-P4, and the position of the transmission message of the voice video detection layer in the current session corresponds to The value range is P5-P6, and 0 ⁇ P1 ⁇ P2, P2 ⁇ P3 ⁇ P4, P2 ⁇ P5 ⁇ P6.
  • the detection level of Skype according to the number of transmission packets may be divided by analyzing the traffic characteristics of the transmission message and the integrated processing of the experience values, and after dividing the detection level of Skype, it may also be determined.
  • the statistical threshold corresponding to the traffic in each detection level that is, the preset traffic statistics threshold corresponding to the suspected Skype session detection layer, the first preset traffic statistics threshold corresponding to the text transmission detection layer, and the second pre-correspondence corresponding to the file transmission detection layer Set a traffic statistics threshold, and a third preset traffic statistics threshold corresponding to the voice and video detection layer.
  • the traffic statistics are not performed.
  • the default traffic statistics threshold corresponding to the Skype session detection layer is usually zero, and the calculation of the remaining preset traffic statistics thresholds is also performed on the traffic.
  • the feature analysis and the comprehensive processing of the empirical value are obtained, and the embodiment of the present invention does not describe this.
  • processing unit 32 may be specifically configured to: when it is determined that the detection level to which the transmission message belongs is the suspected Skype session detection layer, and the current session is not marked with a corresponding function application label, The transmission message performs Skype feature detection.
  • the Skype feature may include at least a session port, a packet length, a specific location packet flow or an application layer load, and the like.
  • processing unit 32 may be specifically configured to: when it is determined that the detection level to which the transmission message belongs is the text transmission detection layer, and the current session has been marked with a suspected Skype session application label, The transmission message is used for traffic detection and Skype text transmission feature detection.
  • processing unit 32 may be specifically configured to: when it is determined that the detection level to which the transmission message belongs is the file transmission detection layer, and the current session has been marked with a text transmission function, The transmission message is used for traffic detection and Skype file transmission feature detection.
  • processing unit 32 may be specifically configured to: when determining that the detection level to which the transmission message belongs is the voice video detection layer, and the current session has been marked with a text transmission function When the label is used, the transmission message is subjected to traffic and Skype audio and video feature detection.
  • Embodiment 2 of the present invention provides an apparatus for identifying a communication stream based on different functions of Skype, acquiring a packet transmitted in a current session, and performing preliminary detection on the transmission packet. If the transmission packet is accurately identified, The corresponding function is applied to the current session tag, and the detection level to which the transmission message belongs is determined, and the transmission message is detected according to the detection rule corresponding to the detection level to which the transmission message belongs. And when the detection condition is met, the current session is marked with a function corresponding to the detection level to which the transmission message belongs. That is to say, in the technical solution described in the embodiment of the present invention, the problem that the coupled traffic cannot be distinguished is solved by incremental identification, thereby being able to identify a single function of Skype, and complete fine access control of the Skype traffic. In turn, it can block the specified functions of Skype, improve network bandwidth, and optimize the office environment.
  • embodiments of the present invention can be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • a computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明公开了一种基于Skype不同功能通信流的识别方法及装置，该方法包括，获取当前会话中传输报文，并对所述传输报文进行初步检测，若所述传输报文被准确识别，则将所述当前会话标记上相应的功能应用标签，否则确定所述传输报文所归属的检测层次，并按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，并在满足检测条件时，将所述当前会话标记上所述传输报文所归属的检测层次对应的功能应用标签。也就是说，在本发明中，通过递增性识别，解决了耦合性流量无法区分的问题，从而能够识别出Skype的单一功能，可以完成对Skype流量的精细化访问控制。

Description

一种基于Skype不同功能通信流的识别方法及装置
本申请要求在2015年12月18日提交中国专利局、申请号为201510958932.1、发明名称为“一种基于Skype不同功能通信流的识别方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种基于Skype不同功能通信流的识别方法及装置。
背景技术
Skype是全球最受欢迎的即时通讯软件之一，它可以免费、清晰地与其他用户语音对话，也可以拨打国内国际电话。Skype主要使用p2p(peer to peer，点对点)网络架构及私有协议通信，对数据也进行了强加密处理，并且Skype的通信过程非常复杂，代码量也很大，所以很难通过逆向工作对其进行源码分析，到目前为止对于Skype的识别还处于简单识别阶段。
例如，现有识别技术可通过对Skype的登陆过程进行识别，来限制Skype所有功能的使用，或是，对Skype功能的部分流量进行识别，如对于Skype的某些功能产生的通信流所对应的那部分流量进行识别，若超过设定流量阈值则对该部分流量进行部分限流操作。但是，对于Skype的单一功能(如文字聊天、文件传输等)，现有识别技术还无法完全识别，原因是Skype的多个主要功能在通信过程中有一部分流量的耦合性较大，现有识别技术难以进行区分，因此也无法针对Skype的单一功能进行限流操作。
也就是说，现有识别技术无法对Skype功能通信流中的耦合性较大的流量进行识别，因此无法对Skype的单一功能进行识别，从而导致无法针对Skype常用功能进行精细限流。
发明内容
本发明实施例提供了一种基于Skype不同功能通信流的识别方法及装置，用以解决现有识别技术无法对Skype功能通信流中的耦合性较大的流量进行识别，因此无法对Skype的单一功能进行识别，从而导致无法针对Skype常用功能进行精细限流的问题。
第一方面，提供了一种基于Skype不同功能通信流的识别方法，所述方法包括：
获取当前会话中传输报文；
对所述传输报文进行初步检测，若所述传输报文被准确识别，则将所述当前会话标记上相应的功能应用标签；若所述传输报文未被准确识别，则确定所述传输报文所归属的检测层次；
按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，并在满足检测条件时，将所述当前会话标记上所述传输报文所归属的检测层次对应的功能应用标签。
结合第一方面，在第一方面的第一种可能的实现方式中，所述方法还包括：
对已标记上相应的功能应用标签的所述当前会话进行限流操作。
结合第一方面，在第一方面的第二种可能的实现方式中，所述对所述传输报文进行初步检测，包括：
利用DPI(Deep Packet Inspection，深度包检测)技术和DFI(Deep/Dynamic Flow Inspection，动态流检测)技术对所述传输报文进行初步检测。
结合第一方面，在第一方面的第三种可能的实现方式中，所述确定所述传输报文所归属的检测层次，包括：
确定获取到的所述传输报文在所述当前会话中的位置所对应的数值P，其中，P为正整数；
根据所述传输报文在所述当前会话中的位置所对应的数值P以及预先划 分的检测层次，确定所述传输报文所归属的检测层次。
结合第一方面的第三种可能的实现方式，在第一方面的第四种可能的实现方式中，所述检测层次至少包括：
疑似Skype会话检测层、文字传输检测层、文件传输检测层和语音视频检测层；
其中，疑似Skype会话检测层的传输报文在所述当前会话中的位置所对应的数值范围为0-P1，文字传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P1-P2，文件传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P3-P4，语音视频检测层的传输报文在所述当前会话中的位置所对应的数值范围为P5-P6，且0<P1<P2，P2<P3<P4，P2<P5<P6。
结合第一方面的第四种可能的实现方式，在第一方面的第五种可能的实现方式中，当确定所述传输报文所归属的检测层次为所述疑似Skype会话检测层且所述当前会话未被标记上相应的功能应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，包括：
对所述传输报文进行Skype特征检测。
结合第一方面的第五种可能的实现方式，在第一方面的第六种可能的实现方式中，所述Skype特征至少包括：
会话端口、报文长度、特定位置报文流向或应用层负载。
结合第一方面的第四种可能的实现方式，在第一方面的第七种可能的实现方式中，当确定所述传输报文所归属的检测层次为所述文字传输检测层且所述当前会话已被标记上疑似Skype会话应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，包括：
对所述传输报文进行流量以及Skype文字传输特征检测。
结合第一方面的第四种可能的实现方式，在第一方面的第八种可能的实现方式中，当确定所述传输报文所归属的检测层次为所述文件传输检测层且所述当前会话已被标记上文字传输功能应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，包括：
对所述传输报文进行流量以及Skype文件传输特征检测。
结合第一方面的第四种可能的实现方式，在第一方面的第九种可能的实现方式中，当确定所述传输报文所归属的检测层次为所述语音视频检测层且所述当前会话已被标记上文字传输功能应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，包括：
对所述传输报文进行流量以及Skype音视频特征检测。
第二方面，提供了一种基于Skype不同功能通信流的识别装置，所述装置包括：
获取单元，用于获取当前会话中传输报文；
处理单元，用于对获取单元获取到的所述传输报文进行初步检测，若所述传输报文被准确识别，则将所述当前会话标记上相应的功能应用标签；若所述传输报文未被准确识别，则确定所述传输报文所归属的检测层次，并按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，并在满足检测条件时，将所述当前会话标记上所述传输报文所归属的检测层次对应的功能应用标签。
结合第二方面，在第二方面的第一种可能的实现方式中，所述装置还包括限流单元：
所述限流单元，用于对已标记上相应的功能应用标签的所述当前会话进行限流操作。
结合第二方面，在第二方面的第二种可能的实现方式中，所述处理单元，具体用于利用DPI技术和DFI技术对所述传输报文进行初步检测。
结合第二方面，在第二方面的第三种可能的实现方式中，所述处理单元，具体用于确定获取到的所述传输报文在所述当前会话中的位置所对应的数值P，其中，P为正整数，并根据所述传输报文在所述当前会话中的位置所对应的数值P以及预先划分的检测层次，确定所述传输报文所归属的检测层次。
结合第二方面的第三种可能的实现方式，在第二方面的第四种可能的实现方式中，所述检测层次至少包括：
疑似Skype会话检测层、文字传输检测层、文件传输检测层和语音视频检测层；
其中，疑似Skype会话检测层的传输报文在所述当前会话中的位置所对应的数值范围为0-P1，文字传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P1-P2，文件传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P3-P4，语音视频检测层的传输报文在所述当前会话中的位置所对应的数值范围为P5-P6，且0<P1<P2，P2<P3<P4，P2<P5<P6。
结合第二方面的第四种可能的实现方式，在第二方面的第五种可能的实现方式中，所述处理单元，具体用于当确定所述传输报文所归属的检测层次为所述疑似Skype会话检测层且所述当前会话未被标记上相应的功能应用标签时，对所述传输报文进行Skype特征检测。
结合第二方面的第五种可能的实现方式，在第二方面的第六种可能的实现方式中，所述Skype特征至少包括：
会话端口、报文长度、特定位置报文流向或应用层负载。
结合第二方面的第四种可能的实现方式，在第二方面的第七种可能的实现方式中，所述处理单元，具体用于当确定所述传输报文所归属的检测层次为所述文字传输检测层且所述当前会话已被标记上疑似Skype会话应用标签时，对所述传输报文进行流量以及Skype文字传输特征检测。
结合第一方面的第四种可能的实现方式，在第一方面的第八种可能的实现方式中，所述处理单元，具体用于当确定所述传输报文所归属的检测层次为所述文件传输检测层且所述当前会话已被标记上文字传输功能应用标签时，对所述传输报文进行流量以及Skype文件传输特征检测。
结合第一方面的第四种可能的实现方式，在第一方面的第九种可能的实现方式中，所述处理单元，具体用于当确定所述传输报文所归属的检测层次为所述语音视频检测层且所述当前会话已被标记上文字传输功能应用标签时，对所述传输报文进行流量以及Skype音视频特征检测。
根据第一～第二方面提供的方法及装置，可获取当前会话中传输报文，并 对所述传输报文进行初步检测，若所述传输报文被准确识别，则将所述当前会话标记上相应的功能应用标签，否则确定所述传输报文所归属的检测层次，并按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，并在满足检测条件时，将所述当前会话标记上所述传输报文所归属的检测层次对应的功能应用标签。也就是说，在本发明实施例所述技术方案中，通过递增性识别，解决了耦合性流量无法区分的问题，从而能够识别出Skype的单一功能，可以完成对Skype流量的精细化访问控制，进而可以实现对Skype指定功能的封堵，提高网络带宽，优化办公环境。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1所示为本发明实施例一所述的一种基于Skype不同功能通信流的识别方法的流程示意图；
图2所示为本发明实施例一所述的一种基于Skype不同功能通信流的识别方法的详细流程示意图；
图3所示为本发明实施例二所述的一种基于Skype不同功能通信流的识别装置的结构示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
实施例一：
本发明实施例一提供了一种基于Skype不同功能通信流的识别方法，如图1所示，其为本发明实施例一所述的基于Skype不同功能通信流的识别方法的流程示意图，所述方法可包括以下步骤：
步骤101：获取当前会话中传输报文。
步骤102：对所述传输报文进行初步检测，若所述传输报文被准确识别，则将所述当前会话标记上相应的功能应用标签；若所述传输报文未被准确识别，则确定所述传输报文所归属的检测层次。
步骤103：按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，并在满足检测条件时，将所述当前会话标记上所述传输报文所归属的检测层次对应的功能应用标签。
也就是说，在本发明实施例所述技术方案中，通过递增性识别，解决了耦合性流量无法区分的问题，从而能够识别出Skype的单一功能，可以完成对Skype流量的精细化访问控制，进而可以实现对Skype指定功能的封堵，提高网络带宽，优化办公环境。
进一步地，在步骤102中，对所述传输报文进行初步检测，可具体实施为：
利用DPI技术和DFI技术对所述传输报文进行初步检测。
需要说明的是，利用DPI技术和DFI技术的结合，可准确地识别出非耦合性的Skype流量，从而对被准确识别的会话标记上相应的功能应用标签，后续则不会再对该会话进行进一步的检测操作，即非耦合性的Skype流量对应的会话在此步骤可以完成检测。
进一步地，在步骤102中，确定所述传输报文所归属的检测层次，可具体实施为：
确定获取到的所述传输报文在所述当前会话中的位置所对应的数值P，其中，P为正整数；
根据所述传输报文在所述当前会话中的位置所对应的数值P以及预先划 分的检测层次，确定所述传输报文所归属的检测层次。
可选地，所述检测层次至少包括：
疑似Skype会话检测层、文字传输检测层、文件传输检测层和语音视频检测层；
其中，疑似Skype会话检测层的传输报文在所述当前会话中的位置所对应的数值范围为0-P1，文字传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P1-P2，文件传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P3-P4，语音视频检测层的传输报文在所述当前会话中的位置所对应的数值范围为P5-P6，且0<P1<P2，P2<P3<P4，P2<P5<P6。
需要说明的是，预先根据传输报文在所述当前会话中的位置所对应的数值范围划分Skype的检测层次可以是通过对传输报文的流量特征分析以及经验值的综合处理来划分的，且在划分Skype的检测层次之后，还可确定每个检测层次内的流量对应的统计阀值，即疑似Skype会话检测层对应的预设流量统计阈值，文字传输检测层对应的第一预设流量统计阈值，文件传输检测层对应的第二预设流量统计阈值，语音视频检测层对应的第三预设流量统计阈值。另外，需要说明的是其中，通常在疑似Skype会话检测时不会做流量统计，因此疑似Skype会话检测层对应的预设流量统计阈值通常为零，其余预设流量统计阈值的计算也是通过对流量的特性分析与经验值的综合处理所得到的，本发明实施例对此不作赘述。
进一步地，针对步骤103，当确定所述传输报文所归属的检测层次为所述疑似Skype会话检测层且所述当前会话未被标记上相应的功能应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，可具体实施为：
对所述传输报文进行Skype特征检测。
也就是说，在对所述传输报文进行Skype特征检测后，若所述传输报文满足Skype特征，则将所述传输报文所对应的当前会话标记上疑似Skype会话应用标签。
需要说明的是，若确定所述传输报文所归属的检测层次为所述疑似Skype会话检测层，但所述传输报文所对应的当前会话若已被标记上相应的功能应用标签，则结束该检测流程，维持初步检测中DPI技术和DFI技术对当前会话的检测结果。
可选地，所述Skype特征可至少包括会话端口、报文长度、特定位置报文流向或应用层负载等，本发明实施例对此不作赘述。
具体地，对所述传输报文进行Skype特征检测，可检测所述传输报文所对应的当前会话所占用的会话端口号是否为Skype配置的相应会话端口，或者，Skype传输协议特征码对应的报文的起始位置，是否与Skype配置的相应起始位置相匹配等等，当满足任一个或多个Skype特征时可将所述传输报文所对应的当前会话标记上疑似Skype会话应用标签。
进一步地，针对步骤103，当确定所述传输报文所归属的检测层次为所述文字传输检测层且所述当前会话已被标记上疑似Skype会话应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，可具体实施为：
对所述传输报文进行流量以及Skype文字传输特征检测。
具体地，对所述传输报文进行流量以及Skype文字传输特征检测，可具体实施为：
从所述传输报文中选取具有Skype文字传输特征的第一部分报文进行流量统计，并确定所述第一部分报文的流量统计值，以及，提取所述第一部分报文中的Skype文字传输特征，并进行Skype文字传输特征检测；
将所述第一部分报文的流量统计值与所述文字传输检测层设置的第一预设流量统计阈值进行比较，以及确定所述第一部分报文中的Skype文字传输特征与所述文字传输检测层对应的Skype文字传输特征是否匹配。
之后，若确定所述第一部分报文的流量统计值不小于所述第一预设流量统计阈值且所述第一部分报文中的Skype文字传输特征与所述文字传输检测层对应的Skype文字传输特征相匹配，则将所述传输报文所对应的当前会话 标记上文字传输功能应用标签。
需要说明的是，若确定所述传输报文所归属的检测层次为所述文字传输检测层，但所述传输报文所对应的当前会话若未被标记上疑似Skype会话应用标签，则结束该检测流程，维持疑似Skype会话检测层的检测结果。
另外，需要说明的是，为了使得文字传输检测层的检测更加快捷，在该层检测时除了可同时进行流量检测和Skype文字传输特征检测之外，还可对所述传输报文仅进行流量检测，也就是说，若确定所述第一部分报文的流量统计值不小于所述第一预设流量统计阈值，则可直接将所述传输报文所对应的当前会话标记上文字传输功能应用标签，本发明实施例对此不作赘述。
进一步地，针对步骤103，当确定所述传输报文所归属的检测层次为所述文件传输检测层且所述传输报文所对应的当前会话已被标记上文字传输功能应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，可具体实施为：
对所述传输报文进行流量以及Skype文件传输特征检测。
具体地，对所述传输报文进行流量以及Skype文件传输特征检测，可具体实施为：
从所述传输报文中选取具有Skype文件传输特征的第二部分报文进行流量统计，并确定所述第二部分报文的流量统计值，以及，提取所述第二部分报文中的Skype文件传输特征，并进行Skype文件传输特征检测；
将所述第二部分报文的流量统计值与所述文件传输检测层设置的第二预设流量统计阈值进行比较，以及确定所述第二部分报文中的Skype文件传输特征与所述文件传输检测层对应的Skype文件传输特征是否匹配。
之后，若确定所述第二部分报文的流量统计值不小于所述第二预设流量统计阈值且所述第二部分报文中的Skype文件传输特征与所述文件传输检测层对应的Skype文件传输特征相匹配，则将所述传输报文所对应的当前会话标记上文件传输功能应用标签；
若所述第二部分报文的流量统计值小于所述第二预设流量统计阈值和/或 所述第二部分报文中的Skype文件传输特征与所述文件传输检测层对应的Skype文件传输特征不匹配，并且确定所述传输报文所归属的检测层次为所述语音视频检测层，则提取所述第二部分报文中的Skype音视频特征，并进行相应的Skype音视频特征检测，当所述第二部分报文中的Skype音视频特征与所述语音视频检测层对应的Skype音视频特征相匹配时，将所述传输报文所对应的当前会话标记上语音视频功能应用标签。
也就是说，若确定所述传输报文所对应的当前会话为文件传输功能会话时，则可更新所述传输报文所对应的当前会话的功能应用标签，即将所述传输报文所对应的当前会话在上层文字传输检测层所标记的文字传输功能应用标签更新为文件传输功能应用标签，若不符合文件传输层的检测条件，如所述第二部分报文的流量统计值小于所述第二预设流量统计阈值，则可继续确定所述传输报文所归属的检测层次是否为语音视频检测层，若是，则可检测相关的音视频特征，当满足检测条件时，则可更新所述传输报文所对应的当前会话的功能应用标签，即将所述传输报文所对应的当前会话在上层文字传输检测层所标记的文字传输功能应用标签更新为语音视频功能应用标签。
需要说明的是，若均不符合该检测层次的检测条件，则结束本次检测流程，如，若确定所述传输报文所归属的检测层次为所述文件传输检测层，但所述传输报文所对应的当前会话若未被标记上文字传输功能应用标签，则结束本次检测流程，维持文字传输检测层的检测结果。
另外，需要说明的是，为了使得文件传输检测层的检测更加快捷，在该层检测时除了可同时进行流量检测和Skype文件传输特征检测之外，还可对所述传输报文仅进行流量检测，也就是说，若确定所述第二部分报文的流量统计值不小于所述第二预设流量统计阈值，则可直接将所述传输报文所对应的当前会话标记上文件传输功能应用标签；
若所述第二部分报文的流量统计值小于所述第二预设流量统计阈值且确定所述传输报文所归属的检测层次为所述语音视频检测层，则提取所述第二部分报文中的Skype音视频特征，并进行Skype音视频特征检测，当所述第 二部分报文中的Skype音视频特征与所述语音视频检测层对应的Skype音视频特征相匹配时，可将所述传输报文所对应的当前会话标记上语音视频功能应用标签。
进一步地，针对步骤103，当确定所述传输报文所归属的检测层次为所述语音视频检测层且所述当前会话已被标记上文字传输功能应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，可具体实施为：
对所述传输报文进行流量以及Skype音视频特征检测。
具体地，对所述传输报文进行流量以及Skype音视频特征检测，可具体实施为：
从所述传输报文中选取具有Skype音视频特征的第三部分报文进行流量统计，并确定所述第三部分报文的流量统计值，以及，提取所述第三部分报文中的Skype音视频特征，并进行Skype音视频特征检测；
将所述第三部分报文的流量统计值与所述语音视频检测层设置的第三预设流量统计阈值进行比较，以及确定所述第三部分报文中的Skype音视频特征与所述语音视频检测层对应的Skype音视频特征是否匹配。
之后，若确定所述第三部分报文的流量统计值不小于所述第三预设流量统计阈值且所述第三部分报文中的Skype音视频特征与所述语音视频检测层对应的Skype音视频特征相匹配，则将所述传输报文所对应的当前会话标记上语音视频功能应用标签。
也就是说，若确定所述传输报文所对应的当前会话为语音视频功能会话时，则更新所述传输报文所对应的当前会话的功能应用标签，即将所述传输报文所对应的当前会话在上层文字传输检测层所标记的文字传输功能应用标签更新为语音视频功能应用标签。
需要说明的是，若确定所述传输报文所归属的检测层次为所述语音视频检测层，但所述所对应的当前会话若未被标记上文字传输功能应用标签，则结束该检测流程，维持文字传输检测层的检测结果。
另外，需要说明的是，为了使得语音视频检测层的检测更加快捷，在该层检测时除了可同时进行流量检测和Skype音视频特征检测之外，还可对所述已输报文仅进行流量检测，也就是说，若确定所述第三部分报文的流量统计值不小于所述第三预设流量统计阈值，则可直接将所述传输报文所对应的当前会话标记上语音视频功能应用标签，本发明实施例对此不作赘述。
由上述内容可知本发明实施例所述的识别方法为递增性识别方法，当未标记上上层功能应用标签时，则结束本次检测流程，维持上层检测结果。也就是说，本发明实施例所述的技术方案，通过使用递增性识别方法，以及结合DPI技术和DFI技术的检测方法，可以解决在Skype识别过程中对耦合性大的流量无法区分的难题，达到对Skype单一功能的精细化识别控制。
进一步地，为了使得本发明实施例所述技术方案更清晰，现以一具体详细流程图对本发明实施例所述的基于Skype不同功能通信流的识别方法进行详细展示，具体可如图2所示。
进一步地，在根据上述流程识别出Skype的单一功能后，如果需要对Skype的单一功能进行限流操作，则所述方法还可包括：
对已标记上相应的功能应用标签的所述当前会话进行限流操作。
可选地，可根据用户的实际需求对已标记上相应的功能应用标签的会话进行限流操作，如在公司的办公环境下，可限制已标记上语音视频功能应用标签的会话的相关操作，从而提高办公环境的网络带宽。
本发明实施例一提供了一种基于Skype不同功能通信流的识别方法，获取当前会话中传输报文，并对所述传输报文进行初步检测，若所述传输报文被准确识别，则将所述当前会话标记上相应的功能应用标签，否则确定所述传输报文所归属的检测层次，并按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，并在满足检测条件时，将所述当前会话标记上所述传输报文所归属的检测层次对应的功能应用标签。也就是说，在本发明实施例所述技术方案中，通过递增性识别，解决了耦合性流量无法区分的问题，从而能够识别出Skype的单一功能，可以完成对Skype流量的精 细化访问控制，进而可以实现对Skype指定功能的封堵，提高网络带宽，优化办公环境。
实施例二
基于与本发明实施例一相同的发明构思，本发明实施例二提供了一种基于Skype不同功能通信流的识别装置，所述识别装置的具体实施可参见上述方法实施例一中的相关描述，重复之处不再赘述。具体地，如图3所示，其为所述基于Skype不同功能通信流的识别装置的结构示意图，所述基于Skype不同功能通信流的识别装置具体可包括：
获取单元31，可用于获取当前会话中传输报文；
处理单元32，用于对获取单元31获取到的所述传输报文进行初步检测，若所述传输报文被准确识别，则将所述当前会话标记上相应的功能应用标签；若所述传输报文未被准确识别，则确定所述传输报文所归属的检测层次，并按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，并在满足检测条件时，将所述当前会话标记上所述传输报文所归属的检测层次对应的功能应用标签。
进一步地，所述装置还可包括限流单元33：
所述限流单元33，可用于对已标记上相应的功能应用标签的所述当前会话进行限流操作。
进一步地，所述处理单元32，可具体用于利用DPI技术和DFI技术对所述传输报文进行初步检测。
进一步地，所述处理单元32，可具体用于确定获取到的所述传输报文在所述当前会话中的位置所对应的数值P，其中，P为正整数，并根据所述传输报文在所述当前会话中的位置所对应的数值P以及预先划分的检测层次，确定所述传输报文所归属的检测层次。
可选地，所述检测层次至少包括：
疑似Skype会话检测层、文字传输检测层、文件传输检测层和语音视频检测层；
其中，疑似Skype会话检测层的传输报文在所述当前会话中的位置所对应的数值范围为0-P1，文字传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P1-P2，文件传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P3-P4，语音视频检测层的传输报文在所述当前会话中的位置所对应的数值范围为P5-P6，且0<P1<P2，P2<P3<P4，P2<P5<P6。
需要说明的是，预先根据传输报文个数划分Skype的检测层次可以是通过对传输报文的流量特征分析以及经验值的综合处理来划分的，且在划分Skype的检测层次之后，还可确定每个检测层次内的流量对应的统计阀值，即疑似Skype会话检测层对应的预设流量统计阈值，文字传输检测层对应的第一预设流量统计阈值，文件传输检测层对应的第二预设流量统计阈值，语音视频检测层对应的第三预设流量统计阈值。另外，需要说明的是其中，通常在疑似Skype会话检测时不会做流量统计，因此疑似Skype会话检测层对应的预设流量统计阈值通常为零，其余预设流量统计阈值的计算也是通过对流量的特性分析与经验值的综合处理所得到的，本发明实施例对此不作赘述。
进一步地，所述处理单元32，可具体用于当确定所述传输报文所归属的检测层次为所述疑似Skype会话检测层且所述当前会话未被标记上相应的功能应用标签时，对所述传输报文进行Skype特征检测。
可选地，所述Skype特征可至少包括会话端口、报文长度、特定位置报文流向或应用层负载等，本发明实施例对此不作赘述。
进一步地，所述处理单元32，可具体用于当确定所述传输报文所归属的检测层次为所述文字传输检测层且所述当前会话已被标记上疑似Skype会话应用标签时，对所述传输报文进行流量以及Skype文字传输特征检测。
进一步地，所述处理单元32，可具体用于当确定所述传输报文所归属的检测层次为所述文件传输检测层且所述当前会话已被标记上文字传输功能应用标签时，对所述传输报文进行流量以及Skype文件传输特征检测。
进一步地，所述处理单元32，可具体用于当确定所述传输报文所归属的检测层次为所述语音视频检测层且所述当前会话已被标记上文字传输功能应 用标签时，对所述传输报文进行流量以及Skype音视频特征检测。
本发明实施例二提供了一种基于Skype不同功能通信流的识别装置，获取当前会话中传输报文，并对所述传输报文进行初步检测，若所述传输报文被准确识别，则将所述当前会话标记上相应的功能应用标签，否则确定所述传输报文所归属的检测层次，并按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，并在满足检测条件时，将所述当前会话标记上所述传输报文所归属的检测层次对应的功能应用标签。也就是说，在本发明实施例所述技术方案中，通过递增性识别，解决了耦合性流量无法区分的问题，从而能够识别出Skype的单一功能，可以完成对Skype流量的精细化访问控制，进而可以实现对Skype指定功能的封堵，提高网络带宽，优化办公环境。
本领域技术人员应明白，本发明的实施例可提供为方法、装置(设备)、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、装置(设备)和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (20)

  1. 一种基于Skype不同功能通信流的识别方法，其特征在于，包括：
    获取当前会话中传输报文；
    对所述传输报文进行初步检测，若所述传输报文被准确识别，则将所述当前会话标记上相应的功能应用标签；若所述传输报文未被准确识别，则确定所述传输报文所归属的检测层次；
    按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，并在满足检测条件时，将所述当前会话标记上所述传输报文所归属的检测层次对应的功能应用标签。
  2. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    对已标记上相应的功能应用标签的所述当前会话进行限流操作。
  3. 如权利要求1所述的方法，其特征在于，所述对所述传输报文进行初步检测，包括：
    利用深度包检测DPI技术和动态流检测DFI技术对所述传输报文进行初步检测。
  4. 如权利要求1所述的方法，其特征在于，所述确定所述传输报文所归属的检测层次，包括：
    确定获取到的所述传输报文在所述当前会话中的位置所对应的数值P，其中，P为正整数；
    根据所述传输报文在所述当前会话中的位置所对应的数值P以及预先划分的检测层次，确定所述传输报文所归属的检测层次。
  5. 如权利要求1或4所述的方法，其特征在于，所述检测层次至少包括：
    疑似Skype会话检测层、文字传输检测层、文件传输检测层和语音视频检测层；
    其中，疑似Skype会话检测层的传输报文在所述当前会话中的位置所对应的数值范围为0-P1，文字传输检测层的传输报文在所述当前会话中的位置 所对应的数值范围为P1-P2，文件传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P3-P4，语音视频检测层的传输报文在所述当前会话中的位置所对应的数值范围为P5-P6，且0<P1<P2，P2<P3<P4，P2<P5<P6。
  6. 如权利要求5所述的方法，其特征在于，当确定所述传输报文所归属的检测层次为所述疑似Skype会话检测层且所述当前会话未被标记上相应的功能应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，包括：
    对所述传输报文进行Skype特征检测。
  7. 如权利要求6所述的方法，其特征在于，所述Skype特征至少包括：
    会话端口、报文长度、特定位置报文流向或应用层负载。
  8. 如权利要求5所述的方法，其特征在于，当确定所述传输报文所归属的检测层次为所述文字传输检测层且所述当前会话已被标记上疑似Skype会话应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，包括：
    对所述传输报文进行流量以及Skype文字传输特征检测。
  9. 如权利要求5所述的方法，其特征在于，当确定所述传输报文所归属的检测层次为所述文件传输检测层且所述当前会话已被标记上文字传输功能应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，包括：
    对所述传输报文进行流量以及Skype文件传输特征检测。
  10. 如权利要求5所述的方法，其特征在于，当确定所述传输报文所归属的检测层次为所述语音视频检测层且所述当前会话已被标记上文字传输功能应用标签时，所述按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，包括：
    对所述传输报文进行流量以及Skype音视频特征检测。
  11. 一种基于Skype不同功能通信流的识别装置，其特征在于，包括：
    获取单元，用于获取当前会话中传输报文；
    处理单元，用于对获取单元获取到的所述传输报文进行初步检测，若所述传输报文被准确识别，则将所述当前会话标记上相应的功能应用标签；若所述传输报文未被准确识别，则确定所述传输报文所归属的检测层次，并按照所述传输报文所归属的检测层次对应的检测规则对所述传输报文进行检测，并在满足检测条件时，将所述当前会话标记上所述传输报文所归属的检测层次对应的功能应用标签。
  12. 如权利要求11所述的装置，其特征在于，所述装置还包括限流单元：
    所述限流单元，用于对已标记上相应的功能应用标签的所述当前会话进行限流操作。
  13. 如权利要求11所述的装置，其特征在于，
    所述处理单元，具体用于利用深度包检测DPI技术和动态流检测DFI技术对所述传输报文进行初步检测。
  14. 如权利要求11所述的装置，其特征在于，
    所述处理单元，具体用于确定获取到的所述传输报文在所述当前会话中的位置所对应的数值P，其中，P为正整数，并根据所述传输报文在所述当前会话中的位置所对应的数值P以及预先划分的检测层次，确定所述传输报文所归属的检测层次。
  15. 如权利要求11或14所述的装置，其特征在于，所述检测层次至少包括：
    疑似Skype会话检测层、文字传输检测层、文件传输检测层和语音视频检测层；
    其中，疑似Skype会话检测层的传输报文在所述当前会话中的位置所对应的数值范围为0-P1，文字传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P1-P2，文件传输检测层的传输报文在所述当前会话中的位置所对应的数值范围为P3-P4，语音视频检测层的传输报文在所述当前会话中的位置所对应的数值范围为P5-P6，且0<P1<P2，P2<P3<P4，P2<P5<P6。
  16. 如权利要求15所述的装置，其特征在于，
    所述处理单元，具体用于当确定所述传输报文所归属的检测层次为所述疑似Skype会话检测层且所述当前会话未被标记上相应的功能应用标签时，对所述传输报文进行Skype特征检测。
  17. 如权利要求16所述的装置，其特征在于，所述Skype特征至少包括：
    会话端口、报文长度、特定位置报文流向或应用层负载。
  18. 如权利要求15所述的装置，其特征在于，
    所述处理单元，具体用于当确定所述传输报文所归属的检测层次为所述文字传输检测层且所述当前会话已被标记上疑似Skype会话应用标签时，对所述传输报文进行流量以及Skype文字传输特征检测。
  19. 如权利要求15所述的装置，其特征在于，
    所述处理单元，具体用于当确定所述传输报文所归属的检测层次为所述文件传输检测层且所述当前会话已被标记上文字传输功能应用标签时，对所述传输报文进行流量以及Skype文件传输特征检测。
  20. 如权利要求15所述的装置，其特征在于，
    所述处理单元，具体用于当确定所述传输报文所归属的检测层次为所述语音视频检测层且所述当前会话已被标记上文字传输功能应用标签时，对所述传输报文进行流量以及Skype音视频特征检测。
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