CN113518366B - Wireless hybrid networking ring prevention method and system - Google Patents
Wireless hybrid networking ring prevention method and system Download PDFInfo
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- CN113518366B CN113518366B CN202110478622.5A CN202110478622A CN113518366B CN 113518366 B CN113518366 B CN 113518366B CN 202110478622 A CN202110478622 A CN 202110478622A CN 113518366 B CN113518366 B CN 113518366B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Abstract
The invention provides a wireless hybrid networking ring prevention method and system, and belongs to the technical field of wireless communication. The wireless mixed networking ring prevention method comprises the following steps: step one: starting, the equipment enters a start-up process; step two: the Backhaul sta enters a scanning stage to carry out scanning treatment; step three: the SSID processing module is used for preferentially associating the appointed BSSID; step four: judging whether the Backhaul sta is successfully associated, if so, ending, and if not, executing the fifth step; step five: the Backhaul sta and the upper level are disconnected; step six: the backstaul bss actively disconnects the lower connection and ends. The beneficial effects of the invention are as follows: the problem of mutual correlation among agents is solved.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a wireless hybrid networking ring prevention method and system.
Background
The Wi-Fi easy mesh network manages the network with one controller to which a plurality of agents (network nodes) are connected. Wi-Fi EasyMesh controller is often located within a primary gateway that connects the residential network to the infrastructure of the service provider. The primary gateway includes a controller and an integrated agent that is also managed by the controller.
Wherein the controller consists of a backseat haul bss and a fronthaul bss. The agent is composed of a backhaul bss, a fronthaul bss, and a backhaul sta.
The meaning and effect of each character are shown in Table 1.
The easy networking mode is characterized in that all the ssids for establishing the backhaul bss are consistent. According to the principle of the scanning mechanism, the backhaul sta of an Agent will randomly connect to a certain device of the same ssid. This is prone to the following problems.
Problem 1: the agents are associated with each other after the network is powered off, so that the agents cannot be connected to a controller to influence surfing.
As shown in fig. 1, before networking, agent1 is connected to a controller, and agent2 is connected to agent1. At this time, if the entire network is powered off, the device systems of agent1 and agent2 may come up first because the start time is not synchronous, and agent2 will scan the ssid of agent1 first, and associate with agent1.agent1 also scans the ssid of agent2 and associates with agent2, so that agent1 and agent2 are associated with each other. At this time, if the controller is up, the agents will not all be associated with the controller, thereby affecting surfing.
Problem 2: wireless loop of multi-frequency network
As shown in fig. 2, due to the existence of the multi-frequency network, the backhaul of 2G of the agent1 is connected to the backhaul bss of the controller 2G, the backhaul of 5G of the agent1 is connected to the backhaul bss of the controller 5G, and both 2G and 5G are bound to the same bridge, so that a loop is formed between two wireless nodes.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a wireless hybrid networking ring prevention method and a wireless hybrid networking ring prevention system.
The wireless hybrid networking loop prevention method comprises the following steps:
step one: starting, the equipment enters a start-up process;
step two: the Backhaul sta enters a scanning stage to carry out scanning treatment;
step three: the SSID processing module is used for preferentially associating the appointed BSSID;
step four: judging whether the Backhaul sta is successfully associated, if so, ending, and if not, executing the fourth step;
step five: the Backhaul sta and the upper level are disconnected;
step six: the backstaul bss actively disconnects the lower connection and ends.
The invention further improves, after the first step is executed, the step of dynamically creating the Vap interface is executed at the same time when the second step is executed: and creating a backhaul sta interface of a frequency band corresponding to the channel, and connecting the backhaul sta interface of a frequency band different from the channel.
The invention further improves, the processing method for dynamically creating the Vap interface comprises two steps:
one is dynamic vap processing module configuration processing, the other is selecting an optimal channel through a channel management module, if the frequency band corresponding to the optimal channel is 2G, establishing a backhaul sta interface of the down 5G frequency band, and creating a backhaul sta interface of the 2G; if the frequency band corresponding to the optimal channel is 5G, a backhaul sta interface of the down 2G frequency band is created.
In a further improvement of the invention, in the second step, the scanning process comprises an active scanning process or a passive scanning process, wherein,
the active scanning process is as follows: the backhaul sta of the agent actively transmits a detection request frame carrying a target SSID, and after receiving the detection request frame, the backhaul bss of the agent does not respond, so that the active scanning process is cut off;
the passive scanning process is as follows: and starting the SSID hiding function, hiding the SSID of the agent's backhaul, and cutting off the passive scanning process.
The invention further improves, the processing method of the active scanning is as follows:
(1) The wireless association process receives a probe request frame probreq;
(2) The wireless association process responds to the detection response flow and filters a detection response frame probresp;
(3) Judging whether the interface currently processed meets the requirements of a backup and whether the current equipment is a reagent, if the current interface meets the requirements of processing, entering filtering strategy processing, and if the current interface does not meet the requirements of processing, executing the next step;
(4) Judging whether to filter a probe request frame probreq, if yes, not responding to a probe response frame, if no, ending, wherein the filtering strategy processing process is as follows:
(1) Initializing the filtering state to-1;
(2) Finding a backhaul sta interface corresponding to the current radio through wireless drive conversion traversal according to the index of the current interface;
(3) If the upper level is associated, the filtering state of the Backhaul sta is set to 0, which means that the response detection response is not filtered, if the upper level is not associated, the filtering state of the Backhaul sta is set to 1, which means that the response detection response is not required, and the Backhaul bss of the agent is set to be hidden by default;
(4) The wired connection state is obtained, and if the current equipment is wired connected, the filtering state is set to 0, which means that the response detection response is required to be unfiltered.
In the third step, the processing method of the SSID processing module preferentially associated with the appointed BSSID comprises the following steps:
s31: configuring a specified BSSID and an SSID;
s32: setting the priority of the backsthaul bss of the BSSID to be higher than the priority of the appointed SSID;
s33: a scanning module for executing wireless driving to scan SSID;
s34: obtaining a scanning result, and matching scanning information according to the BSSID and the SSID;
s35: if the specified BSSID (MAC address of the station) and the SSID are matched, selecting a matched backhaul bss association, if the specified SSID is not matched, selecting the matched SSID, selecting the random backhaul bss of the BSSID for connection, and if the SSID is not matched, continuing scanning without association.
In the sixth step, the processing procedure of actively disconnecting the lower connection is as follows:
s61: adding sta Connet State netlink advertisements in the announcement callbacks of sta connection State changes
S62: detecting that the sta connection state changes, and informing a corresponding interface to a process A through a netlink;
s63: when the process A receives a netlink notice from the kernel, the process A sends a sta message under the background of deletion and disconnection to the wireless driver through the ioctl, and the wireless driver executes the sta deleting action after receiving the message.
The invention also provides a system for realizing the wireless hybrid networking loop prevention method, which comprises the following steps: and a starting module: for starting up the device; and the scanning processing module is used for: the device is used for carrying out scanning treatment when the Backhaul sta enters a scanning stage; and the association processing module is used for: for preferentially associating a specified BSSID; and a judging module: used for judging whether the association of the Backhaul sta is successful; the upper-level connection disconnection module: for disconnecting the Backhaul sta from the upper level;
the lower-level connection disconnection module: for Backhaul bss to actively disconnect the lower level connection.
The invention further improves, also comprises a Vap interface dynamic creation module which is used for creating a backhaul sta interface of the frequency band corresponding to the channel and connecting the backhaul sta interface of the frequency band different from the channel.
Compared with the prior art, the invention has the beneficial effects that: the scanning processing ensures that the agents cannot be associated with each other when the agents are not associated with the upper level, so that the problem of the mutual association between the agents is solved; the problem that the whole network is restarted to be abnormal and the control management is lost is solved; the problem that the control is lost due to abnormal control or networking abnormality caused by restarting is solved; the problem of networking confusion caused by abnormal restarting of the agents is solved; the added priority association designates the ssid function of the bssid, so that the networking is more convenient, and the networking topology is not controlled. Networking according to expected results preferentially; the dynamic creation of the Vap interface effectively solves the problem of wireless loops.
Drawings
FIG. 1 is a schematic diagram of a non-associative controller after a network outage;
fig. 2 is a diagram illustrating loops formed between wireless nodes of a multi-frequency network;
FIG. 3 is a flow chart of the method of the present invention;
FIG. 4 is a flow chart of an active scanning process;
FIG. 5 is a flow chart of a method of SSID processing for preferentially associating a specified BSSID;
FIG. 6 is a flow chart of a method of actively disconnecting a lower level connection;
FIG. 7 is a flowchart of a method of dynamic creation of a vap.
Detailed Description
The invention will be described in further detail with reference to the drawings and examples.
As shown in fig. 3, the wireless hybrid networking loop prevention method of the present invention includes the following steps:
step one: starting, the equipment enters a start-up process;
step two: the Backhaul sta enters a scanning phase, where it performs a scanning process, where it may perform an active scanning process or a passive scanning process, where,
the active scanning process is as follows: the backhaul sta of the agent actively transmits a detection request frame carrying a target SSID, and after receiving the detection request frame, the backhaul bss of the agent does not respond, so that the active scanning process is cut off;
the passive scanning process is as follows: and starting the SSID hiding function, hiding the SSID of the agent's backhaul, and cutting off the passive scanning process.
Step three: the SSID processing module is used for preferentially associating the appointed BSSID;
step four: judging whether the Backhaul sta is successfully associated, if so, ending, and if not, executing the fourth step;
step five: the Backhaul sta and the upper level are disconnected;
step six: the backstaul bss actively disconnects the lower connection and ends.
In order to solve the problem of wireless loop of the multi-frequency network, in this example, after the first step is executed, the second step is executed, and meanwhile, the step of dynamically creating the Vap interface is executed: and creating a backhaul sta interface of a frequency band corresponding to the channel, and connecting the backhaul sta interface of a frequency band different from the channel.
As shown in fig. 3 and 7, the processing method for dynamically creating the Vap interface in this example includes two methods:
one is dynamic vap processing module configuration processing, the other is selecting an optimal channel through a channel management module, if the frequency band corresponding to the optimal channel is 2G, establishing a backhaul sta interface of the down 5G frequency band, and creating a backhaul sta interface of the 2G; if the frequency band corresponding to the optimal channel is 5G, a backhaul sta interface of the down 2G frequency band is created.
By default, this example uses 5G networking, and only a 5G sta interface is created. At this time, if the user manually switches the configuration to 2G networking, the sta interface of 5G will be down, enabling the sta interface of 2G. If a certain function needs to switch the frequency band, the wireless adaptation only creates a wireless interface of the corresponding frequency band, and the already created interface is down.
As shown in fig. 4, the processing method of the active scanning in this example is:
(1) The wireless association process receives a probe request frame probreq;
(2) The wireless association process responds to the detection response flow and filters a detection response frame probresp;
(3) Judging whether the interface currently processed meets the requirements of a backup and whether the current equipment is a reagent, if the current interface meets the requirements of processing, entering filtering strategy processing, and if the current interface does not meet the requirements of processing, executing the next step;
(4) Judging whether to filter a probe request frame probreq, if yes, not responding to a probe response frame, if no, ending, wherein the filtering strategy processing process is as follows:
(1) Initializing the filtering state to-1;
(2) Finding a backhaul sta interface corresponding to the current radio through wireless drive conversion traversal according to the index of the current interface;
(3) If the upper level is associated, the filtering state of the Backhaul sta is set to 0, which means that the response detection response is not filtered, if the upper level is not associated, the filtering state of the Backhaul sta is set to 1, which means that the response detection response is not required, and the Backhaul bss of the agent is set to be hidden by default;
(4) The wired connection state is obtained, and if the current equipment is wired connected, the filtering state is set to 0, which means that the response detection response is required to be unfiltered.
As shown in FIG. 5, the present invention alters the drive scan mechanism to let stas preferentially associate the ssids of the specified bsids, and if the ssids of the specified bsids are not found, associate the specified ssids. Specifically, the processing method of the SSID processing module of the preferential association appointed BSSID in this example is as follows:
s31: configuring a specified BSSID and an SSID;
s32: setting the priority of the backsthaul bss of the BSSID to be higher than the priority of the appointed SSID;
s33: a scanning module for executing wireless driving to scan SSID;
s34: obtaining a scanning result, and matching scanning information according to the BSSID and the SSID;
s35: if the specified BSSID (MAC address of the station) and the SSID are matched, selecting a matched backhaul bss association, if the specified SSID is not matched, selecting the matched SSID, selecting the random backhaul bss of the BSSID for connection, and if the SSID is not matched, continuing scanning without association.
Preferably, as an embodiment of the present invention, a channel information management module is further provided for interference information of a surrounding environment of the mobile phone, so as to be able to correlate to a device with an optimal signal.
As shown in fig. 6, the controller is connected to the agent1 at a lower level, and the agent1 is connected to the topology of the agent2 at a lower level, and if the controller is powered off or abnormally leaves at this time, the agent1 is also connected to the agent2 at a lower level. agent1 considers that agent2 is connected to the upper level, then agent1 may go to connect to agent2, and therefore if agent and upper level are disconnected, the lower level device is actively disconnected. In a specific implementation, sta nodes are deleted by directly invoking a wireless chip driven interface. The processing procedure of actively disconnecting the lower connection in this example is as follows:
s61: adding sta Connet State netlink advertisements in the announcement callbacks of sta connection State changes
S62: detecting that the sta connection state changes, and informing a corresponding interface to a process A through a netlink;
s63: when the process A receives a netlink notice from the kernel, the process A sends a sta message under the background of deletion and disconnection to the wireless driver through the ioctl, and the wireless driver executes the sta deleting action after receiving the message.
Through the technical scheme of the invention, the following innovation points can be realized:
(1) The processing of passive scanning and active scanning enables the agents to be not associated with each other when the agents are not associated with the upper level, so that the problem of the mutual association between the agents is solved; the problem that the whole network is restarted to be abnormal and the control management is lost is solved; the problem that the control is lost due to abnormal control or networking abnormality caused by restarting is solved; the problem of networking confusion caused by abnormal restarting of the agents is solved;
(2) The invention increases the ssid function of the preferential association appointed bsid, the networking is more convenient, and the networking topology is not controlled. Networking is preferably performed according to the expected result.
(3) The dynamic creation of the Vap (virtual access point) interface is adopted, so that the problem of a wireless loop is effectively solved.
The above embodiments are preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, which includes but is not limited to the embodiments, and equivalent modifications according to the present invention are within the scope of the present invention.
Claims (7)
1. The wireless hybrid networking ring prevention method is characterized by comprising the following steps of:
step one: starting, the equipment enters a start-up process;
step two: the Backhaul sta enters a scanning stage to carry out scanning treatment;
step three: the SSID processing module is used for preferentially associating the appointed BSSID;
step four: judging whether the Backhaul sta is successfully associated, if so, ending, and if not, executing the fifth step;
step five: the Backhaul sta and the upper level are disconnected;
step six: the backstaul bss actively disconnects the lower connection, ends,
in the second step, the scanning process includes active scanning process;
the processing method of the active scanning comprises the following steps:
(1) The wireless association process receives a probe request frame probreq;
(2) The wireless association process responds to the detection response flow and filters a detection response frame probresp;
(3) Judging whether the interface currently processed meets the requirements of a backup and whether the current equipment is a reagent, if the current interface meets the requirements of processing, entering filtering strategy processing, and if the current interface does not meet the requirements of processing, executing the next step;
(4) Judging whether to filter the probe request frame probreq, if yes, not responding to the probe response frame, if no, ending,
the filtering strategy processing process comprises the following steps:
(a) Initializing the filtering state to-1;
(b) Finding a backhaul sta interface corresponding to the current radio through wireless drive conversion traversal according to the index of the current interface;
(c) If the upper level is associated, the filtering state of the Backhaul sta is set to 0, which means that the response detection response is not filtered, if the upper level is not associated, the filtering state of the Backhaul sta is set to 1, which means that the response detection response is not required, and the Backhaul bss of the agent is set to be hidden by default;
(d) The wired connection state is obtained, and if the current equipment is wired connected, the filtering state is set to 0, which means that the response detection response is required to be unfiltered.
2. The wireless hybrid networking loop prevention method according to claim 1, wherein: after the first step is executed, the step two is executed, and meanwhile, the step of dynamically creating the Vap interface is executed: and creating a backhaul sta interface of a frequency band corresponding to the channel, and connecting the backhaul sta interface of a frequency band different from the channel.
3. The wireless hybrid networking loop prevention method according to claim 2, wherein: the processing method for dynamically creating the Vap interface comprises two steps:
one is dynamic vap processing module configuration processing, the other is selecting an optimal channel through a channel management module, if the frequency band corresponding to the optimal channel is 2G, establishing a backhaul sta interface of the down 5G frequency band, and creating a backhaul sta interface of the 2G; if the frequency band corresponding to the optimal channel is 5G, a backhaul sta interface of the down 2G frequency band is created.
4. A wireless hybrid networking loop prevention method according to any one of claims 1-3, wherein: in the third step, the processing method of the SSID processing module preferentially associated with the appointed BSSID is as follows:
s31: configuring a specified BSSID and an SSID;
s32: setting the priority of the backsthaul bss of the BSSID to be higher than the priority of the appointed SSID;
s33: a scanning module for executing wireless driving to scan SSID;
s34: obtaining a scanning result, and matching scanning information according to the BSSID and the SSID;
s35: if the specified BSSID and SSID are matched, selecting the matched backhaul bss for association, if the specified SSID is not matched, selecting the matched SSID, selecting the random backhaul bss of the BSSID for connection, and if the SSID is not matched, continuing scanning without association.
5. A wireless hybrid networking loop prevention method according to any one of claims 1-3, wherein: in the sixth step, the processing procedure of actively disconnecting the lower connection is as follows:
s61: adding sta Connet State netlink advertisements in the announcement callbacks of sta connection State changes
S62: detecting that the sta connection state changes, and informing a corresponding interface to a process A through a netlink;
s63: when the process A receives a netlink notice from the kernel, the process A sends a sta message under the background of deletion and disconnection to the wireless driver through the ioctl, and the wireless driver executes the sta deleting action after receiving the message.
6. A system for implementing the wireless hybrid networking anti-loop method of any one of claims 1-5, comprising:
and a starting module: for starting up the device;
and the scanning processing module is used for: the device is used for carrying out scanning treatment when the Backhaul sta enters a scanning stage;
and the association processing module is used for: for preferentially associating a specified BSSID;
and a judging module: used for judging whether the association of the Backhaul sta is successful;
the upper-level connection disconnection module: for disconnecting the Backhaul sta from the upper level;
the lower-level connection disconnection module: for Backhaul bss to actively disconnect the lower level connection.
7. The system according to claim 6, wherein: the dynamic Vap interface creating module is used for creating a backhaul sta interface of a frequency band corresponding to the channel and connecting the backhaul sta interface of a frequency band different from the channel.
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