CN111917608B - Method and device for judging Internet connectivity based on Linux system equipment - Google Patents

Method and device for judging Internet connectivity based on Linux system equipment Download PDF

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Publication number
CN111917608B
CN111917608B CN202010790104.2A CN202010790104A CN111917608B CN 111917608 B CN111917608 B CN 111917608B CN 202010790104 A CN202010790104 A CN 202010790104A CN 111917608 B CN111917608 B CN 111917608B
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module
session
judging
udp
tcp
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CN111917608A (en
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王通源
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Shenzhen Youhua Software Technology Co ltd
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    • 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
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
    • 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
    • H04L43/12—Network monitoring probes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]

Abstract

The invention relates to a method and a device for judging Internet connectivity based on Linux system equipment, wherein the method comprises the steps of traversing all UDP sessions or TCP sessions in/proc/net/nf _ conntrack; judging whether a UDP session or a TCP session exists or not, and meeting the requirement of timeout time; if yes, judging whether the source address or the destination address of the UDP session or the TCP session belongs to the network connected with the current equipment; if yes, sending Internet connectivity detection message. The invention further judges the network connectivity through the receiving and sending history records of the effective data of the user, judges whether the network is connected, and sends the Internet connectivity detection message if the result can not be judged. The invention can greatly reduce the sending amount of the detection data, effectively purify the network environment, and reduce the burden of the network server or gateway equipment, thereby reducing the operation cost of network operators and improving the internet experience of users.

Description

Method and device for judging Internet connectivity based on Linux system equipment
Technical Field
The invention relates to the technical field of communication, in particular to a method and a device for judging Internet connectivity based on Linux system equipment.
Background
A network device is an electronic device that can connect to the Internet and access network resources. At present, almost all network devices can determine whether the Internet is connected, and this is expressed in the following way:
1. the gateway equipment prompts a user on a management page according to Internet connectivity, and whether network dialing is finished or not;
2. and intelligent terminals such as mobile phones and the like can prompt users whether to switch networks or not according to Internet connectivity.
If all network devices frequently detect Internet connectivity, a common method for detecting Internet connectivity at present is to send detection data to a network server or a gateway device and judge whether to connect according to a packet loss rate. This results in a large amount of detection data in the network, which easily causes network congestion, affects network quality, and increases the burden on the network server or gateway device, thereby increasing the operation cost of the network operator and reducing the network use experience of the user.
Disclosure of Invention
Therefore, there is a need for a method and an apparatus for determining Internet connectivity based on Linux system device, which can optimize the determination of Internet connectivity, reduce the amount of transmitted detection data, effectively purify the network environment, and reduce the burden of the network server or gateway device.
In order to achieve the above purpose, the invention adopts the following technical scheme.
The invention firstly provides a method for judging Internet connectivity based on Linux system equipment, which mainly comprises the following steps:
step 10: traversing all UDP sessions or TCP sessions in the/proc/net/nf _ conntrack;
step 20: judging whether a UDP session or a TCP session exists, and meeting the following conditions:
UMax-uleft (n) < 10; or
TMax-TLeft(n)<10；
Wherein, UMax is the maximum timeout time of the UDP session, and uleft (n) is the remaining timeout time of the nth UDP session in/proc/net/nf _ conntrack; TMax is the maximum timeout time of the TCP session, TLeft (n) is the residual timeout time of the nth TCP session in/proc/net/nf _ conntrack;
if yes, go to step 30;
step 30: judging whether the source address or the destination address of the UDP session or the TCP session belongs to a network connected with the current equipment; if yes, go to step 40;
step 40: and sending an Internet connectivity detection message.
Preferably, the step 20 further comprises:
if not, go to step 40.
Preferably, the step 30 further comprises:
if not, entering step 50;
wherein the step 50 is: it is determined that the Internet is disconnected.
Preferably, before step 10, the method further comprises the steps of:
step 01: judging whether a default gateway exists; if yes, entering step 02, otherwise, entering step 50;
step 02: detecting whether the gateway can ping with a superior gateway; if yes, go to step 10, otherwise, go to step 50.
Preferably, the method further comprises the following steps:
repeating the steps 10-40 every 10 seconds.
The invention also provides a device for judging Internet connectivity based on Linux system equipment, which comprises:
the traversal module is used for traversing all UDP sessions or TCP sessions in the/proc/net/nf _ conntrack;
the first judgment module is used for judging whether a UDP session or a TCP session exists or not, and meets the following conditions:
UMax-uleft (n) < 10; or
TMax-TLeft(n)<10；
Wherein, UMax is the maximum timeout time of the UDP session, and uleft (n) is the remaining timeout time of the nth UDP session in/proc/net/nf _ conntrack; TMax is the maximum timeout time of the TCP session, TLeft (n) is the residual timeout time of the nth TCP session in/proc/net/nf _ conntrack;
the second judgment module is used for judging whether the source address or the destination address of the UDP session or the TCP session belongs to the network connected with the current equipment;
the detection module is used for sending an Internet connectivity detection message;
if the UDP session or the TCP session meeting the above condition exists, the second determining module determines whether the source address or the destination address of the UDP session or the TCP session belongs to the network connected to the current device, and if so, the detecting module sends an Internet connectivity detecting message.
Preferably, the first judging module is further configured to:
and if the UDP session or the TCP session meeting the conditions does not exist, guiding the detection module to send an Internet connectivity detection message.
Preferably, the second judging module is further configured to:
and if the source address or the destination address of the UDP session or the TCP session does not belong to the network connected with the current equipment, guiding a judging module to work, wherein the judging module is used for judging that the Internet is not communicated.
Preferably, the method further comprises the following steps:
the third judgment module is used for judging whether a default gateway exists or not, if so, the fourth judgment module is guided to work, and if not, the judgment module is guided to work;
and the fourth judgment module is used for detecting whether the communication with the superior gateway ping can be realized, if so, the traversal module is guided to work, and if not, the judgment module is guided to work.
Preferably, the method further comprises the following steps:
and the circulating module is used for repeatedly guiding the traversal module, the first judging module, the second judging module and the detection module to work once every 10 seconds.
The invention can preliminarily check the networking condition of the intelligent terminals such as mobile phones according to whether the default gateway exists or not and whether the intelligent terminals can ping communicate with the superior gateway or not, and further judge the network connectivity through the receiving and sending history of the effective data of the user if the intelligent terminals are in the normal networking state. For a network server or gateway equipment based on a Linux system, data receiving and sending records of the network server or gateway equipment and an intelligent terminal such as a mobile phone are stored in a UDP session or a TCP session, whether the UDP session or the TCP session meeting specific conditions exists in a traversal near period of time or not is judged, whether a source address or a destination address of the UDP session or the TCP session belongs to a network connected with the current equipment or not is judged, and if the source address or the destination address does not belong to the network connected with the current equipment, an Internet connectivity detection message is sent. Therefore, the judging method can greatly reduce the sending amount of the detection data, effectively purify the network environment, and reduce the burden of a network server or gateway equipment, thereby reducing the operation cost of a network operator and improving the internet experience of a user.
Drawings
Fig. 1 is a schematic flow chart of a method for determining Internet connectivity based on Linux system devices in this embodiment;
fig. 2 is a schematic block diagram of an Internet connectivity determining apparatus based on Linux system device in this embodiment.
The implementation of the objects of the present invention and their functions and principles will be further explained in the detailed description with reference to the attached drawings.
Detailed Description
The following further description is made with reference to the drawings and specific embodiments.
As shown in fig. 1, the present embodiment first provides a method for determining Internet connectivity based on a Linux system device, where the Linux system device refers to a network providing device such as a network server or a gateway device, and is not an Internet device such as a mobile phone or a computer. The judging method mainly comprises the following steps of,
s10: traversing all UDP sessions or TCP sessions in the/proc/net/nf _ conntrack;
s20: judging whether a UDP session or a TCP session exists, and meeting the following conditions:
UMax-uleft (n) < 10; or
TMax-TLeft(n)<10；
Wherein, UMax is the maximum timeout time of the UDP session, and uleft (n) is the remaining timeout time of the nth UDP session in/proc/net/nf _ conntrack; TMax is the maximum timeout time of the TCP session, TLeft (n) is the residual timeout time of the nth TCP session in/proc/net/nf _ conntrack;
if yes, go to step S30;
s30: judging whether the source address or the destination address of the UDP session or the TCP session belongs to a network connected with the current equipment; if yes, go to step S40;
s40: and sending an Internet connectivity detection message.
UDP is a User Datagram Protocol, i.e., a User Datagram Protocol, and for a network server or a gateway device based on a Linux system, data transceiving records of the network server or the gateway device and an intelligent terminal such as a mobile phone are stored in a UDP session or a TCP session, and whether a network is connected or not can be preliminarily determined by searching whether a session meeting the above conditions exists in the session.
In the above step S20, UMax-uleft (n) < 10; or TMax-TLeft (n) < 10; referring to the session with the timeout period within 10s, 10s is the preferred range of values proposed in this embodiment, and is not the only feasible value, and therefore, it is understood that in other embodiments, the value may be 8, 9, 11, 12 or other approximate values.
The step S20 further includes:
if not, the process proceeds to step S40.
That is, if there is no session satisfying the above conditions in the session, it indicates that the session is overtime, and the intelligent terminal such as a mobile phone may have been disconnected from the network, at this time, step S40 is entered, that is, an Internet connectivity detection message is sent, and whether the network is connected is finally determined by sending the detection message.
The step S30 further includes:
if not, go to step S50;
wherein, step S50 is: it is determined that the Internet is disconnected.
Judging whether the source address or the destination address of the UDP session or the TCP session belongs to the network connected with the current equipment, wherein the purpose is to detect whether the current equipment has data traffic with an external network, if so, the network is connected, otherwise, the network is not connected, and executing the step S50.
Further, before step S10, the method further includes the steps of:
step S01: judging whether a default gateway exists; if yes, go to step S02, otherwise, go to step 50;
step S02: detecting whether the gateway can ping with a superior gateway; if so, the process proceeds to step S10, otherwise, the process proceeds to step 50.
It is easy to understand that if there is no default gateway, obviously, it indicates that the current device has been disconnected from the gateway, and it can be directly determined that the Internet is not connected, i.e., step S50 is executed.
If the default gateway exists, it is necessary to detect whether ping is possible with the upper gateway, and if ping is possible, it only indicates that the intranet is connected and it is not possible to determine whether the Internet is connected, so it is necessary to proceed to step S10 to continue detection and determination. If the Internet cannot be ping-connected, obviously, the intranet is disconnected, and it can be directly determined that the Internet is not connected, that is, step S50 is executed.
The embodiment further comprises the following steps:
the steps S10 to S40 are repeated every 10 seconds.
That is, it is detected whether the network is connected every 10 seconds, and the detection method is the steps S10 to S40. Of course, the repetition time is not limited to 10 seconds, and may be freely set as needed, and the present invention is not limited thereto.
Therefore, the embodiment can detect the Internet networking condition of the intelligent terminals such as the mobile phone and the like by firstly eliminating the gateway problem and then utilizing the UDP session or TCP session function of the Linux system, and then sends the detection message to the Internet under the condition that the Internet connectivity cannot be judged in all modes, so that the sending amount of the detection data can be greatly reduced, and the network environment can be effectively purified.
Referring to fig. 2, the present invention further provides a device 100 for determining Internet connectivity based on Linux system device, including:
a traversal module 10, configured to traverse all UDP sessions or TCP sessions in the/proc/net/nf _ conntrack;
the first determining module 20 is configured to determine whether there is a UDP session or a TCP session, and satisfy the following conditions:
UMax-uleft (n) < 10; or
TMax-TLeft(n)<10；
Wherein, UMax is the maximum timeout time of the UDP session, and uleft (n) is the remaining timeout time of the nth UDP session in/proc/net/nf _ conntrack; TMax is the maximum timeout time of the TCP session, TLeft (n) is the residual timeout time of the nth TCP session in/proc/net/nf _ conntrack;
a second judging module 30, configured to judge whether a source address or a destination address of the UDP session or the TCP session belongs to a network to which the current device is connected;
the detection module 40 is used for sending an Internet connectivity detection message;
if there is a UDP session or a TCP session that meets the above conditions, the second determining module 30 determines whether the source address or the destination address of the UDP session or the TCP session belongs to the network connected to the current device, and if so, the detecting module 40 sends an Internet connectivity detecting message.
Specifically, the first determining module 20 is further configured to:
and if the UDP session or the TCP session meeting the conditions does not exist, guiding the detection module 40 to send an Internet connectivity detection message.
Furthermore, the second determining module 30 is further configured to:
if the source address or the destination address of the UDP session or the TCP session does not belong to the network to which the current device is connected, a determination module 50 is guided to operate, and the determination module 50 is configured to determine that the Internet is disconnected.
This embodiment still includes:
a third judging module 60, configured to judge whether a default gateway exists, if yes, direct the fourth judging module 70 to operate, and otherwise direct the judging module 50 to operate;
a fourth determining module 70, configured to detect whether the gateway can ping with a superior gateway, if so, direct the traversal module 10 to operate, otherwise, direct the determining module 50 to operate.
Further, still include:
and a circulation module 80, configured to repeatedly guide the traversal module 10, the first determination module 20, the second determination module 30, and the detection module 40 to work once every 10 seconds, and even guide the traversal module 10, the first determination module 20, the second determination module 30, the detection module 40, the determination module 50, the third determination module 60, and the fourth determination module 70 to work once every 10 seconds. Of course, the repetition time is not limited to 10 seconds, and may be freely set as needed, and the present invention is not limited thereto.
The functions and principles of the above modules can be shown in the embodiment shown in fig. 1, and are not described herein again.
In summary, the present invention can preliminarily check the networking status of the intelligent terminals such as the mobile phone according to whether the default gateway exists or not and whether the intelligent terminals can ping communicate with the upper gateway or not, and further judge the network connectivity through the receiving and sending history of the effective data of the user if the intelligent terminals are in the normal networking state. For a network server or gateway equipment based on a Linux system, data receiving and sending records of the network server or gateway equipment and an intelligent terminal such as a mobile phone are stored in a UDP session or a TCP session, whether the UDP session or the TCP session meeting specific conditions exists in a traversal near period of time or not is judged, whether a source address or a destination address of the UDP session or the TCP session belongs to a network connected with the current equipment or not is judged, and if the source address or the destination address does not belong to the network connected with the current equipment, an Internet connectivity detection message is sent. Therefore, the judging method can greatly reduce the sending amount of the detection data, effectively purify the network environment, and reduce the burden of a network server or gateway equipment, thereby reducing the operation cost of a network operator and improving the internet experience of a user.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (8)

1. A method for judging Internet connectivity based on Linux system equipment is characterized by comprising the following steps,
step 01: judging whether a default gateway exists; if yes, entering step 02, otherwise, entering step 50, wherein the step 50 is as follows: determining that the Internet is disconnected;
step 02: detecting whether the gateway can ping with a superior gateway; if yes, entering step 10, otherwise, entering step 50;
step 10: traversing all UDP sessions or TCP sessions in the/proc/net/nf _ conntrack;
step 20: judging whether a UDP session or a TCP session exists, and meeting the following conditions:
UMax-uleft (n) < 10; or
TMax-TLeft(n)<10；
Wherein, UMax is the maximum timeout time of the UDP session, and uleft (n) is the remaining timeout time of the nth UDP session in/proc/net/nf _ conntrack; TMax is the maximum timeout time of the TCP session, TLeft (n) is the residual timeout time of the nth TCP session in/proc/net/nf _ conntrack;
if yes, go to step 30;
step 30: judging whether the source address or the destination address of the UDP session or the TCP session belongs to a network connected with the current equipment; if yes, go to step 40;
step 40: and sending an Internet connectivity detection message.
2. The method of claim 1, wherein the step 20 further comprises:
if not, go to step 40.
3. The method of claim 1, wherein the step 30 further comprises:
if not, go to step 50.
4. The judgment method according to any one of claims 1 to 3, further comprising the steps of:
repeating the steps 10-40 every 10 seconds.
5. An Internet connectivity judging device based on Linux system equipment is characterized by comprising:
the third judging module is used for judging whether a default gateway exists or not, if so, the fourth judging module is guided to work, otherwise, the judging module is guided to work, wherein the judging module is used for judging that the Internet is not communicated;
the fourth judgment module is used for detecting whether the gateway can ping with the superior gateway or not, if so, the traversal module is guided to work, and if not, the judgment module is guided to work;
the traversal module is used for traversing all UDP sessions or TCP sessions in the/proc/net/nf _ conntrack;
the first judgment module is used for judging whether a UDP session exists or not, and meeting the conditions:
UMax-uleft (n) < 10; or
TMax-TLeft(n)<10；
Wherein, UMax is the maximum timeout time of the UDP session, and uleft (n) is the remaining timeout time of the nth UDP session in/proc/net/nf _ conntrack; TMax is the maximum timeout time of the TCP session, TLeft (n) is the residual timeout time of the nth TCP session in/proc/net/nf _ conntrack;
the second judgment module is used for judging whether the source address or the destination address of the UDP session belongs to the network connected with the current equipment;
the detection module is used for sending an Internet connectivity detection message;
if the UDP session or the TCP session meeting the above condition exists, the second determining module determines whether the source address or the destination address of the UDP session or the TCP session belongs to the network connected to the current device, and if so, the detecting module sends an Internet connectivity detecting message.
6. The apparatus according to claim 5, wherein the first determining module is further configured to:
and if the UDP session or the TCP session meeting the conditions does not exist, guiding the detection module to send an Internet connectivity detection message.
7. The apparatus according to claim 6, wherein the second determining module is further configured to:
and if the source address or the destination address of the UDP session or the TCP session does not belong to the network connected with the current equipment, guiding a judging module to work.
8. The judgment device according to any one of claims 5 to 7, further comprising:
and the circulating module is used for repeatedly guiding the traversal module, the first judging module, the second judging module and the detection module to work once every 10 seconds.
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