CN107959939B - Method and device for identifying connectivity of wireless Access Point (AP) - Google Patents
Method and device for identifying connectivity of wireless Access Point (AP) Download PDFInfo
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- CN107959939B CN107959939B CN201711484151.9A CN201711484151A CN107959939B CN 107959939 B CN107959939 B CN 107959939B CN 201711484151 A CN201711484151 A CN 201711484151A CN 107959939 B CN107959939 B CN 107959939B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
Abstract
The invention discloses a method and a device for identifying the connectivity of a wireless Access Point (AP), relates to the technical field of wireless communication, and can identify whether the wireless Access Point (AP) has the connectivity. The method mainly comprises the following steps: detecting a wireless frame broadcast by the AP by using a detection tool; the wireless frame is obtained by a wired end of an AP conversion detection tool or a first data packet sent by a server; and if the wireless frame is matched with the first data packet, determining that the AP has connectivity.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a connectivity identification method and apparatus for a wireless access point AP.
Background
A Wireless Access Point (AP) is the most commonly used device for establishing a small Wireless lan. The AP is equivalent to a bridge connected with a network and a wireless network, and mainly has the function of connecting all wireless network clients together and then connecting the wireless network into the Ethernet. In general, when the checked AP is accessed into the network, the client connected to the AP may use the network resource.
However, there are often times when an AP is not audited to access the network. At this time, the client accessing the network through the unverified AP is an illegal client. When an illegal client accesses network resources, the network resources may be leaked.
Therefore, in order to avoid the illegal client using network resources, how to identify the connectivity of the AP becomes an urgent problem to be solved.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for identifying connectivity of an AP, which can identify whether the AP has connectivity.
The purpose of the invention is realized by adopting the following technical scheme:
in a first aspect, the present invention provides a method for identifying connectivity of a wireless access point, where the method includes:
detecting a wireless frame broadcast by the AP by using a detection tool; wherein, the wireless frame is obtained by converting a first data packet sent by a wired terminal of the detection tool or a server by the AP;
and if the characteristic identifier in the wireless frame is matched with the first data packet, determining that the AP has connectivity.
Optionally, if the detection tool detects that the wired end or the server receives the data packet sent by the AP, it is determined that the AP has connectivity.
Optionally, when the AP is a bridged router, if the wireless frame matches the first data packet, determining that the AP has connectivity includes:
if the Source Address (SA) in the wireless frame is the physical Address (MAC) of the wired end or the server included in the first data packet, and the transmitting end Address (TA) in the wireless frame is the MAC of the bridged router, it is determined that the AP has connectivity.
Optionally, when the AP is a network address translation router or a bridge router, if the wireless frame matches the first data packet, determining that the AP has connectivity includes:
and if the wireless frame contains the authentication information in the first data packet, determining that the AP has connectivity.
Optionally, the detection tool sends a detection data packet to all devices in the network segment where the wired end of the detection tool is located; wherein the detection packet is used for detecting a network address translation router in the device;
if a response data packet returned by the equipment is detected, determining that the equipment is a target AP;
the detection tool detects a wireless frame broadcast by the AP, and comprises the following steps:
the detection tool detects wireless frames broadcast by the target AP.
Optionally, if the wireless frame does not match the first data packet, or the wired end of the detection tool or the server does not receive the data packet, it is determined that the AP does not have connectivity.
In a second aspect, the present invention provides an apparatus for identifying connectivity of a wireless access point AP, including:
the detection module is used for detecting a wireless frame broadcasted by the AP; wherein, the wireless frame is obtained by converting a first data packet sent by a wired terminal of the detection tool or a server by the AP;
a determining module, configured to determine that the AP has connectivity if the detecting module detects that the wireless frame matches the first data packet.
Optionally, the determining module is further configured to determine that the AP has connectivity if the detecting tool detects that the wired end or the server receives the data packet sent by the AP.
Optionally, the determining module is further configured to determine that the AP has connectivity if a source address in the wireless frame is a physical address of the wired end or the server included in the first data packet.
Optionally, the determining module is further configured to determine that the AP has connectivity if the wireless frame includes the authentication information in the first data packet.
In a third aspect, an embodiment of the present invention provides a storage medium, where the storage medium includes a stored program, and when the program runs, the method for identifying connectivity of a wireless access point AP provided in the above first aspect is controlled by a device in which the storage medium is located.
In a fourth aspect, an embodiment of the present invention provides a detection apparatus, where the detection apparatus includes: a storage medium and a processor;
the processor is suitable for realizing instructions;
the storage medium adapted to store a plurality of instructions;
the instructions are adapted to be loaded by the processor and to perform the method for identifying connectivity of a wireless access point AP as provided in the first aspect above.
By the technical scheme, the method and the device for identifying the AP connectivity of the wireless access point detect the wireless frame broadcast by the AP through the detection tool; the wireless frame is obtained by a wired end of an AP conversion detection tool or a first data packet sent by a server; if the detection tool detects that the wireless frame matches the first data packet, it is determined that the AP has connectivity. The scheme provided by the invention can realize the determination of the AP connectivity identification by judging whether the information in the wireless frame is matched with the information in the first data packet.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart illustrating a connectivity identification method for a wireless access point AP according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating another connectivity identification method for an AP according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for identifying connectivity of an unencrypted AP according to an embodiment of the present invention;
fig. 4 is a block diagram illustrating a connectivity identification apparatus for a wireless access point AP according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
An embodiment of the present invention provides a connectivity identification method for an AP, where as shown in fig. 1, the method mainly includes:
s101, detecting a wireless frame broadcasted by the AP by a detection tool.
The wireless frame is converted from a wired end of the AP conversion detection tool or a first data packet sent by the server.
In practical applications, the detection tool is usually a software for capturing data packets, for example, sniffer. The above-mentioned APs can be generally divided into encrypted APs and unencrypted APs. A typical AP is typically an unencrypted AP. Further, the AP may be divided into a wireless router and a network address translation router, which are bridged. Based on this, the APs can be specifically classified into encrypted bridged wireless routers, unencrypted bridged wireless routers, encrypted network address translation routers, and unencrypted network address translation routers. The first data packet may be a broadcast packet, a multicast packet, a directional data packet, or the like.
It should be added that, when the AP is a bridged router, the first data packet is a broadcast packet or a multicast packet. When the AP is a network address translation router, the first data packet is a directional data packet.
It is further necessary to supplement that the AP broadcasts its own parameter information periodically, and based on the parameter information, it can be determined whether the AP is an encrypted AP or an unencrypted AP, and whether the AP is a bridged wireless router or a network address translation router.
Specifically, the detection tool is connected with a wired end thereof, the wired end thereof is accessed into a LAN (English: Local Area Network, Chinese: Local Area Network), and the wired end of the detection tool sends a first data packet to the outside. And when the AP receives the first data packet, converting the first data packet into a wireless frame and broadcasting the wireless frame. And the detection tool detects the wireless frame at regular time.
S102, if the detection tool detects that the wireless frame is matched with the first data packet, determining that the AP has connectivity.
In practical applications, the information in the radio frame is matched with the information in the first data packet. Specifically, the source address SA in the wireless frame is matched with the MAC address of the first data packet, and the sending end address TA in the wireless frame is matched with the physical address MAC of the bridged router. Or, judging whether the wireless frame contains the information in the first data packet. In addition, the information for matching in the radio frame and the first data packet is not the same for different types of APs.
Based on the above, if the AP is a bridged router, step 102 specifically includes:
in the first case, if the source address SA in the wireless frame is the physical address MAC of the wired end or the server included in the first data packet, and the sending end address TA in the wireless frame is the physical address MAC of the bridged router, it is determined that the AP has connectivity.
It should be noted that, as is obvious to those skilled in the art, when the first data packet is sent from the wired end of the detection tool, the AP is determined to have connectivity when the SA of the wireless frame is the MAC of the wired end of the detection tool, and the sending end address TA of the wireless frame is the physical address MAC of the bridged router. Correspondingly, when the first data packet is sent by the server, when the SA of the wireless frame is the MAC of the server and the sending end address TA of the wireless frame is the physical address MAC of the bridged router, it is determined that the AP has connectivity.
Further, for the bridged router, authentication information may be inserted in the first packet. For example, since the first three bytes of the MAC in the first packet are a fixed value of 01: 00: 5e, the last three bits of the MAC can be inserted into the authentication information, and the DA bit can not be changed because the AP is encrypted or not. Based on this, the step 102 specifically includes:
in the second case (S102b), if the authentication information in the first packet is included in the wireless frame, it is determined that the AP has connectivity.
Based on the above steps, another method for identifying connectivity of an AP is provided in the embodiments of the present invention, as shown in fig. 2.
Further, when determining the connectivity of the network address translation router, the method described in S102b above may also be followed. However, when the connectivity of the nat router is determined according to S102b, the wired side of the detection tool sends a first packet to the nat router in the network segment where the detection tool is located. Based on this, before S101, it is necessary to determine a network address translation router. The specific determination steps are as follows:
a. the detection tool sends detection data packets to all devices in the network segment where the wired end of the detection tool is located; wherein the detection packet is used for detecting a network address translator in the device.
b. And if the detection tool detects a response data packet returned by the equipment, determining that the equipment is a target AP (access point), namely the network address translation router.
It should be added that when determining the connectivity of the nat router, the first packet in S101 contains the port of the nat router and other feature information.
In practical application, when the detection packet is data with TTL ═ 1, the nat router returns a timeout message that is unreachable by ICMP, and other devices do not return ICMP messages. In another method, a data packet may be sent to the UDP ports (greater than 61000) of all devices in step a, and devices other than the network address translator may return an unreachable message without the network address translator replying any message. Based on this, the network address translation routers in all devices of the network segment where the detection worker has the line end can be determined.
Based on the above, S101 may be replaced with:
the detection tool detects the radio frames broadcast by the target AP.
It should be added that the above method can only identify the connectivity of the encrypted AP. And for the AP without encryption, the connection can be directly established with the wired end, and then the AP connectivity can be identified. Based on this, the connectivity method of identifying unencrypted APs is as follows:
and if the detection tool detects that the wired end of the detection tool or the server receives a data packet sent by the AP, determining that the AP has connectivity.
Specifically, as shown in fig. 3, the communication frequency band of the detection tool is adjusted to the communication frequency band of the unencrypted AP, so as to ensure that the detection tool can establish a wireless connection with the unencrypted AP; the detection tool establishes wireless connection with the unencrypted AP (at the moment, the detection tool can acquire the address of the unencrypted AP and access the network where the unencrypted AP is located); the unencrypted AP sends a data packet requesting a connection test to a wired end or a server of the detection tool (the data packet is used for detecting whether a network where the AP is located and a wired end network of the detection tool have connectivity); if the detection tool detects that the wired end of the detection tool or the server receives a data packet which is sent by the unencrypted AP and requests a connection test, determining that the unencrypted AP has connectivity; otherwise, the unencrypted AP is determined to have no connectivity.
Of course, when the wireless frame does not match the first data packet, or the wired end of the detection tool or the server does not receive the data packet, it is determined that the AP does not have connectivity.
The method for identifying the AP connectivity of the wireless access point detects the wireless frame broadcast by the AP through a detection tool; the wireless frame is obtained by a wired end of an AP conversion detection tool or a first data packet sent by a server; if the detection tool detects that the wireless frame matches the first data packet, it is determined that the AP has connectivity. The scheme provided by the invention can realize the determination of the AP connectivity identification by judging whether the information in the wireless frame is matched with the information in the first data packet.
Further, according to the above method embodiment, another embodiment of the present invention further provides an apparatus 40 for identifying connectivity of a wireless access point AP, as shown in fig. 4, the apparatus mainly includes: a detection module 41 and a determination module 42. Wherein:
a detection module 41, configured to detect a wireless frame broadcasted by an AP; wherein, the wireless frame is obtained by converting a first data packet sent by a wired terminal of the detection tool or a server by the AP;
a determining module 42, configured to determine that the AP has connectivity if the detecting module 41 detects that the wireless frame matches the first data packet.
Optionally, the determining module 42 is further configured to determine that the AP has connectivity if the detecting tool detects that the wired end or the server receives the data packet sent by the AP.
Optionally, the determining module 42 is further configured to determine that the AP has connectivity if the source address SA in the wireless frame is the physical address MAC of the wired end or the server included in the first data packet, and the sending end address TA in the wireless frame is the physical address MAC of the bridged router.
Optionally, the determining module 42 is further configured to determine that the AP has connectivity if the wireless frame includes the authentication information in the first data packet.
The embodiment of the invention provides a storage medium, which comprises a stored program, wherein when the program runs, a device where the storage medium is located is controlled to execute the steps of the connectivity identification method of the wireless access point AP.
The embodiment of the invention provides detection equipment, wherein a detection device comprises a storage medium and a processor.
The processor is adapted to implement instructions.
The storage medium is adapted to store a plurality of instructions.
The instructions are adapted to be loaded by the processor and to perform the connectivity method of the wireless access point AP as described above.
The embodiment of the invention provides a processor, which is used for running a program, wherein the program executes the steps of the connectivity identification method of the wireless access point AP when running.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It will be appreciated that the relevant features of the method and apparatus described above are referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the module described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The methods provided herein are not inherently related to any particular computer, virtual machine system, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of the connectivity identification method and apparatus for a wireless access point AP according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. A method for identifying connectivity of a wireless Access Point (AP), the method comprising:
detecting a wireless frame broadcast by the AP by using a detection tool; the wireless frame is obtained by converting a first data packet sent by a wired end of the detection tool or a server by the AP, and the AP is an encrypted AP;
if the wireless frame is matched with the first data packet, determining that the AP has connectivity, wherein the AP having connectivity means that the AP is an approved AP;
if the wireless frame is not matched with the first data packet, determining that the AP does not have connectivity, wherein the AP does not have connectivity means that the AP is an unverified AP;
if the AP is a bridged router, and if the wireless frame matches the first packet, determining that the AP has connectivity, including:
and if the source address in the wireless frame is the physical address MAC of the wired end or the server contained in the first data packet, and the sending end address in the wireless frame is the MAC of the bridged router, determining that the AP has connectivity.
2. The method of claim 1, further comprising the step of identifying unencrypted AP connectivity, comprising:
directly establishing connection with an unencrypted AP wired end;
if the wired end of the detection tool or the server does not receive the data packet sent by the AP, determining that the AP does not have connectivity; or
And if the detection tool detects that the wired end or the server receives the data packet sent by the unencrypted AP, determining that the unencrypted AP has connectivity.
3. The method of claim 1, wherein determining that the AP has connectivity if the wireless frame matches the first packet if the AP is a NAT router or a bridged router comprises:
and if the wireless frame contains the authentication information in the first data packet, determining that the AP has connectivity.
4. The method of claim 1, wherein the detecting means detects a radio frame broadcast by the AP if the AP is a nat router, comprising:
the detection tool sends a detection data packet to all devices in a network segment where the wired end of the detection tool is located; wherein the detection packet is used for detecting a network address translation router in the device;
if a response data packet returned by the equipment is detected, determining that the equipment is a target AP;
the detection tool detects a wireless frame broadcast by the AP, and comprises the following steps:
the detection tool detects wireless frames broadcast by the target AP.
5. A connectivity identification device, comprising:
the detection module is used for detecting a wireless frame broadcasted by the AP; the wireless frame is obtained from a wired end of the AP conversion detection tool or a first data packet sent by a server, and the AP is an encrypted AP;
a determining module, configured to determine that the AP has connectivity if the detecting module detects that the wireless frame matches the first data packet, where the AP connectivity means that the AP is an approved AP;
the determining module is further configured to determine that the AP does not have connectivity if the wireless frame is not matched with the first data packet, or a wired end of the detecting tool or a server does not receive the data packet, where the AP does not have connectivity means that the AP is an unverified AP;
if the AP is a bridged router, the determining module is further configured to determine that the AP has connectivity if the source address in the wireless frame is the physical address MAC of the wired end or the server included in the first data packet, and the sender address in the wireless frame is the MAC of the bridged router.
6. The apparatus according to claim 5, wherein the determining module is further configured to identify the unencrypted AP, specifically including identifying connectivity of the AP after directly establishing connection with the unencrypted AP wired end; if the wired end of the detection tool or the server does not receive the data packet, determining that the AP does not have connectivity; or, if the detection tool detects that the wired end or the server receives the data packet sent by the unencrypted AP, determining that the unencrypted AP has connectivity.
7. The apparatus of claim 5, wherein the determining module is further configured to determine that the AP has connectivity if the wireless frame includes authentication information in the first packet if the AP is a NAT router or a bridge router.
8. The apparatus of claim 5, further comprising a sending module, configured to send the detection packet to all devices in a network segment where the wired end of the detection tool is located; the detection data packet is used for detecting a network address translation router in the device, and if a response data packet returned by the device is detected, the device is determined to be a target AP;
the detection module is further configured to detect a wireless frame broadcast by the target AP.
9. A storage medium, characterized in that the storage medium comprises a stored program, wherein when the program runs, the device on which the storage medium is located is controlled to execute the connectivity identification method of the wireless access point AP according to any one of claims 1 to 4.
10. A detection device, characterized in that the detection device comprises: a storage medium and a processor;
the processor is suitable for realizing instructions;
the storage medium adapted to store a plurality of instructions;
the instructions are adapted to be loaded by the processor and to perform the method of connectivity identification of a wireless access point, AP, according to any of claims 1 to 4.
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| CN1878165A (en) * | 2005-06-08 | 2006-12-13 | 华为技术有限公司 | Method for detecting label switching path connectivity |
| CN107113203A (en) * | 2015-01-29 | 2017-08-29 | 华为技术有限公司 | The connective equipment, system and method for debugging network |
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