WO2017206460A1 - Method, apparatus and device for setting maximum transmission unit value - Google Patents

Abstract

Provided are a method, apparatus and device for setting maximum transmission unit value The method comprises: receiving an instruction for instructing a device to boot up and connect to the Internet; determining a minimum maximum transmission unit (MTU) value in a downlink between the device and the server; and setting the determined minimum MTU value in the device. By means of the present invention, the problem in the art that a big data message sent by a server cannot be received due to the fact that a MTU value of a downlink network node cannot be detected is solved.

Description

Method, device and device for setting maximum transmission unit value Technical field

The present invention relates to the field of communications, and in particular, to a method, device, and device for setting a maximum transmission unit value.

Background technique

During the process of accessing the router products that the user passes through, it is often encountered that the maximum transmission unit (MTU) value is incorrect, resulting in the inability to access the Internet. For example, the same type of router product appears in some areas. Internet access is available. Users in some areas cannot access the Internet. Users cannot access the Internet in certain frequency bands and can access the Internet in other frequency bands. Users can open certain websites and cannot open certain websites. In the transmission control protocol (TCP) connection process, the MTU size of both parties is negotiated, and finally the packet transmission is performed according to the minimum MTU. However, this negotiation is only negotiation between the two ends, and nodes in the network. The MTU value is not known during the negotiation process. During the project development period, the operator will communicate with the operator. The minimum MTU size of all network nodes is fixed to the router product. However, this fixed configuration causes the user to be unable to access the Internet when the MTU of the network node changes. In 2014, MF96G products encountered up to 25% customer retreat rate, and finally found out that the reason is that the network MTU parameter changes cause users to not access the Internet.

In the related art, there is a scheme for automatic configuration of MTU and fixed configuration of MTU. For the scheme of automatically configuring the MTU value in the related art, the related technologies are all uplinked by the wireless router through the Internet Control Message Protocol (ICMP) protocol. The large message is sent to the server, and the minimum MTU value in the network node is detected by means of the response message of the server. For this solution, the network nodes passing through the downlink and the uplink may not be the same. There may be a problem that the MTU value of the downlink network node cannot be detected; for the fixed configuration scheme, during the development period of the wireless router, the minimum MTU of the network node is obtained from the operator, and then fixedly configured into the router, which is not flexible enough. If the MTU value of the network node changes, the router cannot dynamically configure the MTU value.

In view of the above technical problems in the related art, an effective solution has not yet been proposed.

Summary of the invention

The embodiment of the present invention provides a method, a device, and a device for setting a maximum transmission unit value, so as to at least solve the problem that the MTU value of the downlink network node cannot be detected and cannot receive the big data packet sent by the server in the related art.

According to an embodiment of the present invention, a method for setting a maximum transmission unit value is provided, comprising: receiving an instruction for instructing a device to be powered on; determining a minimum maximum transmission unit MTU value in a downlink between the device and the server ; Set the determined minimum MTU value in the device.

In the embodiment of the present invention, determining a minimum MTU value in a downlink between the device and the server includes: determining a minimum MTU value by using a Transmission Control Protocol (TCP).

In the embodiment of the present invention, determining the minimum MTU value by using the transmission control protocol TCP includes: determining a maximum MTU value that the device is allowed to set; acquiring text content corresponding to the maximum MTU value of the server; wherein the server establishes a TCP connection with the device. If it is determined that the MTU value set in the device is the maximum MTU value, whether the downlink is connected; if the judgment result is yes, it is determined that the maximum MTU value allowed to be set is the minimum MTU value.

In the embodiment of the present invention, after determining whether the MTU value set in the device is the maximum MTU value, whether the downlink is connected, the method further includes: if the MTU value set in the device is the maximum MTU value. If the downlink is not connected, determine a first MTU value that is smaller than a maximum MTU value by a first predetermined value; and determine whether the downlink is connected if the MTU value set in the device is the first MTU value. When the judgment result is that the downlink is connected, the minimum MTU value is determined by determining that the MTU value set in the device is the first intermediate value between the maximum MTU value and the first MTU value. If the downlink is connected, if the downlink result is that the MTU value set in the device is the first intermediate value between the maximum MTU value and the first MTU value, Continue to judge that the MTU value set in the device is between the first intermediate value and the maximum MTU value. In the case of the second intermediate value, whether the downlink is connected; the above-mentioned determination process of the intermediate value is repeatedly performed until the previous judgment result is that the downlink is connected to the corresponding intermediate value and the latter judgment result is the downlink. In the case where the difference between the non-connected corresponding intermediate values is smaller than the second predetermined value, it is determined that the corresponding intermediate value of the previous judgment result that the downlink is connected is the minimum MTU value.

In the embodiment of the present invention, after determining whether the MTU value set in the device is the first MTU value, whether the downlink is connected, the method further includes: if the downlink result is that the downlink is disconnected And continuing to determine a third MTU value that is smaller than the first MTU value by a third predetermined value, and continuing to determine whether the downlink is connected if the MTU value set in the device is the third MTU value, and repeatedly performing the foregoing fetching The value and the judging process, until the downlink is connected, the first MTU value is taken as the maximum MTU value, and the minimum MTU value is determined in a manner of determining the minimum MTU value in the case where the determination result is that the downlink is connected.

In the embodiment of the present invention, if it is determined that the MTU value set in the device is the second intermediate value between the first intermediate value and the maximum MTU value, whether the downlink is connected includes: detecting a downlink that interacts with the server. a packet; determining whether the maximum downlink packet length in the downlink packet is the second intermediate value; detecting whether the end identifier of the text content transmission is received within the predetermined time; wherein, the maximum downlink packet length is the second middle In the case where the value is received and the end identifier is received within a predetermined time, the downlink connection is determined.

According to another embodiment of the present invention, there is provided a setting device for a maximum transmission unit value, comprising: a receiving module configured to receive an instruction for instructing a device to be powered on; and a determining module configured to determine between the device and the server The minimum and maximum transmission unit MTU value in the downlink; a setting module configured to set the determined minimum MTU value in the device.

In an embodiment of the invention, the determining module is further configured to determine a minimum MTU value by the transmission control protocol TCP.

In the embodiment of the present invention, the determining module is further configured to determine a maximum MTU value that the device is allowed to set; obtain text content corresponding to the maximum MTU value of the server; wherein the server establishes a TCP connection with the device; determining to set in the device MTU value is the maximum MTU value In the case where the downlink is connected; and in the case where the judgment result is yes, it is determined that the maximum MTU value allowed to be set is the minimum MTU value.

In the embodiment of the present invention, the determining module is further configured to determine, when the MTU value set in the device is the maximum MTU value, that the downlink is not connected, and determine the first predetermined value that is smaller than the maximum MTU value. The MTU value is determined whether the downlink is connected if the MTU value set in the device is the first MTU value, and the minimum MTU value is determined by the following manner when the determination result is that the downlink is connected. : determining whether the downlink is connected if the MTU value set in the device is the first intermediate value between the maximum MTU value and the first MTU value; and determining that the MTU value set in the device is the largest In the case of the first intermediate value between the MTU value and the first MTU value, if the downlink is connected, it continues to determine that the MTU value set in the device is the second between the first intermediate value and the maximum MTU value. In the case of the intermediate value, whether the downlink is connected; the above-mentioned determination process of the intermediate value is repeatedly performed until the previous judgment result is that the downlink is connected to the corresponding intermediate value and the latter judgment result is that the downlink is not Unicom If the difference between the intermediate value should be less than a second predetermined value, a determination result is determined before the downlink communication with a corresponding intermediate value minimum MTU value.

In the embodiment of the present invention, the determining module is further configured to continue to determine a third MTU value that is smaller than the first MTU value by a third predetermined value, and continue to determine the third, if the determination result is that the downlink is not connected. In the case of the MTU value, whether the downlink is connected, repeating the above process of taking the third MTU value and determining whether the downlink is connected, until the result of the determination is that the downlink is connected, and the first MTU value is maximized. The MTU value determines the minimum MTU value by determining the minimum MTU value in the case where the determination result is that the downlink is connected.

In the embodiment of the present invention, the determining module is further configured to: detect a downlink packet that interacts with the server; determine whether a maximum downlink packet length in the downlink packet is a second intermediate value; and detect whether the text content is received within a predetermined time. The end identifier of the transmission completion; wherein, when the maximum downlink packet length is the second intermediate value, and the end identifier is received within the predetermined time, the downlink connectivity is determined.

According to another embodiment of the present invention, there is provided an apparatus comprising the above-described setting means for the maximum transmission unit value.

According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is configured to store program code for performing the steps of: receiving an instruction to indicate that the device is powered on; determining a minimum maximum transmission unit MTU value in the downlink between the device and the server; determining a minimum MTU value Set in the device.

With the present invention, since the minimum MTU in the downlink is determined after receiving an instruction for instructing the device to be powered on, the determined minimum MTU value is set in the device, that is, by automatically detecting the minimum MTU value in the downlink. Compared with the minimum MTU value of the network node that detects the uplink route in the prior art, the downlink network node MTU is no longer detected, and the determined downlink MTU is more accurate. The problem that the big data packet sent by the server can be received can solve the problem that the MTU value of the downlink network node cannot be detected and the big data packet sent by the server cannot be received.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a block diagram showing the hardware structure of a mobile terminal for setting a maximum transmission unit value according to an embodiment of the present invention;

2 is a structural block diagram of a network architecture according to an embodiment of the present invention;

3 is a flowchart of a method of setting a maximum transmission unit value according to an embodiment of the present invention;

4 is a schematic flow chart of a method for determining an MTU value according to a preferred embodiment of the present invention;

FIG. 5 is a structural block diagram of a setting device for a maximum transmission unit value according to an embodiment of the present invention; FIG.

6 is a schematic diagram of steps performed by an initialization module according to a preferred embodiment of the present invention;

7 is a step performed by an MTU value configuration module according to a preferred embodiment of the present invention. schematic diagram;

FIG. 8 is a schematic diagram of steps performed by a connection server module according to a preferred embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of steps performed by a downlink message monitoring MTU calculation module according to a preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

Example 1

The method embodiment provided by Embodiment 1 of the present application can be executed in a mobile terminal, a computer terminal or the like. Taking a mobile terminal as an example, FIG. 1 is a hardware structural block diagram of a mobile terminal for setting a maximum transmission unit value according to an embodiment of the present invention. As shown in FIG. 1, the mobile terminal 10 may include one or more (only one shown) processor 102 (the processor 102 may include, but is not limited to, a Microcontroller Unit (MCU) or a programmable logic device. A processing device such as a Field Programmable Gate Array (FPGA), a memory 104 for storing data, and a transmission device 106 for a communication function. It will be understood by those skilled in the art that the structure shown in FIG. 1 is merely illustrative and does not limit the structure of the above electronic device. For example, the mobile terminal 10 may also include more or fewer components than those shown in FIG. 1, or have a different configuration than that shown in FIG.

The memory 104 can be used to store software programs and modules of the application software, such as program instructions/modules corresponding to the setting method of the maximum transmission unit value in the embodiment of the present invention, and the processor 102 runs the software programs and modules stored in the memory 104. Thereby performing various functional applications and data processing, that is, implementing the above method. The memory 104 can include a high speed random access memory, Non-volatile memory can be included, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, memory 104 may further include memory remotely located relative to processor 102, which may be connected to mobile terminal 10 over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Transmission device 106 is for receiving or transmitting data via a network. The above-described network specific example may include a wireless network provided by a communication provider of the mobile terminal 10. In one example, the transmission device 106 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 106 can be a Radio Frequency (RF) module for communicating with the Internet wirelessly.

The embodiment of the present application can be run on the network architecture shown in FIG. 2, as shown in FIG. 2, the network architecture includes: a device and a server, where the device and the server interact with each other.

In this embodiment, a method for setting a maximum transmission unit value of the mobile terminal or the network architecture is provided. FIG. 3 is a flowchart of a method for setting a maximum transmission unit value according to an embodiment of the present invention, as shown in FIG. The process includes the following steps:

Step S302, receiving an instruction for instructing the device to start networking;

Step S304, determining a minimum maximum transmission unit MTU value in a downlink between the device and the server;

Step S306, setting the determined minimum MTU value in the device.

Through the above steps, since the minimum MTU in the downlink is determined after receiving the instruction for instructing the device to start networking, the determined minimum MTU value is set in the device, that is, by automatically detecting the minimum MTU value in the downlink. Compared with the minimum MTU value of the network node that detects the uplink route in the prior art, the downlink network node MTU is no longer detected, and the minimum MTU of the determined downlink is more accurate. The problem of the big data packet sent by the server can be received, and the MTU value of the downlink network node cannot be detected, and the big data packet sent by the server cannot be received. problem.

It should be noted that each of the foregoing network nodes has an allowed minimum MTU value, and the largest MTU value among the minimum MTU values is the minimum MTU value in the downlink; that is, the minimum MTU. The value is the maximum message length of a message that can pass through all network nodes in the downlink.

In an embodiment of the present invention, the above step S304 may be performed to determine a minimum MTU value by using a transmission control protocol TCP. Compared with the related art, the uplink MTU value is sent to the server through the ICMP protocol to detect the minimum MTU value in the network node, and the minimum MTU value of the downlink is determined by using the TCP protocol.

Specifically, determining the minimum MTU value by using the TCP may be performed by: determining a maximum MTU value that the device is allowed to set; acquiring text content corresponding to the maximum MTU value of the server; wherein the server establishes a TCP connection with the device; determining in the device If the set MTU value is the maximum MTU value, whether the downlink is connected; if the judgment result is yes, it is determined that the maximum MTU value that is allowed to be set is the minimum MTU value.

It should be noted that, in the case that the MTU value set in the device is the maximum MTU value, whether the downlink is connected may be: detecting a downlink packet that interacts with the server; and determining a maximum downlink in the downlink packet. Whether the length of the packet is the maximum MTU value; whether the end identifier of the text content transmission is received within a predetermined time; wherein the maximum downlink packet length is the maximum MTU value, and the end identifier is received within the predetermined time. Next, when it is determined that the MTU value set in the device is the maximum MTU, the downlink is connected. That is, if the maximum MTU value allowed by the device enables the downlink to be connected, it can directly determine that the minimum MTU value (final MTU value) of the downlink is the above-prepared MTU value.

It should be noted that the foregoing end identifier may be an http/1.xOK key field, but is not limited thereto.

It should be noted that if the end identifier and/or the acknowledgment (ACK) message are not received within the predetermined time, the minimum MTU value in the downlink should be smaller than the maximum MTU value, and further determination is needed. And thus, in the present invention In the embodiment, after determining whether the MTU value set in the device is the maximum MTU value, whether the downlink is connected, the method may further include: if the MTU value set in the device is the maximum MTU value, If the downlink is not connected, determine a first MTU value that is smaller than a maximum MTU value by a first predetermined value; and determine whether the downlink is connected if the MTU value set in the device is the first MTU value. When the judgment result is that the downlink is connected, the minimum MTU value is determined by determining that the MTU value set in the device is the first intermediate value between the maximum MTU value and the first MTU value. If the downlink is connected, if the downlink is connected, if the downlink is connected, the continuation is determined in the device. If the MTU value is the second intermediate value between the first intermediate value and the maximum MTU value, whether the downlink is connected; repeating the above-mentioned determination process of taking the intermediate value until the previous judgment result is that the downlink is Connected In the case where the difference between the intermediate value and the intermediate value corresponding to the next determination result that the downlink disconnection is less than the second predetermined value, it is determined that the previous intermediate result is that the downlink is connected and the corresponding intermediate value is the smallest. MTU value.

It should be noted that the foregoing first intermediate value may be any value between the maximum MTU value and the first MTU value, and may be an average value of the maximum MTU value and the first MTU value, but is not limited thereto. Similarly, the second intermediate value may be any value between the first intermediate value and the maximum MTU value, or may be an average value of the maximum MTU value and the first intermediate value, but is not limited thereto. In the case where the previous judgment result is that the difference between the corresponding intermediate value in which the downlink is connected and the intermediate value corresponding to the downlink disconnection in the latter judgment result is smaller than the second predetermined value, it is determined that the previous judgment result is the downlink. The corresponding intermediate value of the link is the minimum MTU value. For example, if the MTU value is 9, the judgment result is that the downlink is connected, and when the MTU value is 10, the downlink is not connected, then it can be determined. The minimum MTU value is 9. The MTU value of 9 is considered to be the corresponding intermediate value of the previous judgment result that the downlink is connected. The MTU value of 10 can be regarded as the result of the subsequent judgment being that the downlink is not connected. The intermediate value, the second predetermined value can be set to 2.

It should be noted that, if it is determined that the MTU value set in the device is the second intermediate value between the first intermediate value and the maximum MTU value, whether the downlink is connected may include: Detecting a downlink packet that interacts with the server; determining whether the maximum downlink packet length in the downlink packet is the second intermediate value; detecting whether the end identifier of the text content transmission is received within a predetermined time; wherein, the largest downlink packet is received The length of the text is the second intermediate value, and in the case where the end identifier is received within a predetermined time, the downlink connectivity is determined.

In an embodiment of the present invention, after determining whether the MTU value set in the device is the first MTU value, whether the downlink is connected, the method further includes: determining that the downlink is disconnected In case, if the third MTU value that is smaller than the first MTU value by the third predetermined value is continuously determined, and if the MTU value set in the device is further determined to be the third MTU value, whether the downlink is connected, and the execution is repeated. The process of taking the third MTU value and determining whether the downlink is connected, until the result of the determination is that the downlink is connected, and the first MTU value is used as the maximum MTU value, and the foregoing is determined to be that the downlink is connected. Next, the way to determine the minimum MTU value determines the minimum MTU value.

It should be noted that the first predetermined value, the second predetermined value, and the third predetermined value may be determined according to actual conditions, but are not limited thereto.

It should be noted that, before the foregoing determining whether the downlink is connected, the foregoing method may further include: acquiring text content of the server; that is, each time the MTU value is required, the TCP connection needs to be re-established. It should be noted that the text content of the foregoing obtaining server may be obtained by using a wget command, but is not limited thereto.

The minimum MTU value is determined by the above method, the determination speed of the minimum MTU value is improved, and the accuracy of determining the minimum MTU value of the downlink is also improved.

It should be noted that the execution body of the above steps may be a terminal, a router, or the like, but is not limited thereto.

For a better understanding of the invention, the invention will be further explained below in conjunction with preferred embodiments.

A method for automatically detecting a network MTU value based on a TCP protocol, which is provided by a preferred embodiment of the present invention. After a device (such as a router) is powered on, it is connected to a server configured by default, and obtains a default server text content by using the wget command, and the device detects the server. Connected downgrade The size of the file, whether it receives the message sent by the server, and judges whether the connection ends three conditions according to the HTTP/1.x OK key field to detect the minimum MTU value of the network node. The default configured server address can be changed by the user to the actual web address, and it can be detected whether the currently configured web address is not correct due to the MTU. 4 is a schematic flowchart of a method for determining an MTU value according to a preferred embodiment of the present invention. As shown in FIG. 4, the method includes:

The first step is to configure the router MTU initial value MTU0. MTU0 is small enough to ensure that MTU0 packets can pass through all network nodes; configure the default server address. Users can modify the server address on webui.

In the second step, after the router is powered on for the first time, the router obtains the text content of the server through the wget command.

In the third step, it is detected whether the MTU0 packet can pass through all the network nodes, that is, when the MTU0 is detected, whether the downlink is connected, and if it is connected, the fourth step is performed. If not, the network is unreachable: the router Monitor the downlink packets that interact with the server. If the maximum downlink packet length is MTU0, the HTTP/1.x OK key field is received. Explain that the router is connected to the server link. If the HTTP/1.x OK key field is not received within the TCP timeout period, the network is unreachable, and the MTU is not correct. The network is unreasonable due to other reasons.

The fourth step is to detect whether the 1500 size packet can pass through all network nodes. If yes, configure the router to have a final MTU of 1500. If not, find the final MTU value in the range of MTU0-1500 by the binary search method: reset the router. The MTU value is a maximum of 1500. The router re-monitoring the downlink packets that interact with the server. If the maximum downlink packet length is 1500 and the HTTP/1.x OK key field is received, the final MTU value of the router can be set to 1500. If the HTTP/1.x OK field or the uplink packet ACK acknowledgment message is not received within the TCP timeout period, the minimum MTU value in the downlink network link node is between MTU0 and 1500.

然后使用wget命令获取服务器文本内容，如果在监测的下行报文中，如果最大的下行报文长度为

并收到HTTP/1.x OK关键字段，重新检测MTU为

值，如果在TCP超时时间内没有收到HTTP/1.x OK字段或者上行数据包ACK确认消息，重新检测MTU为

值，按照折半查找法规则依次轮寻查找……。The fifth step is to find the final MTU value in the range of MTU0-1500 by the binary search method. If the minimum MTU of all network nodes in the downlink is in the range of MTU0-1500, then use the binary search method to find the minimum network node of the downlink. MTU value. First set the router MTU to

Then use the wget command to obtain the content of the server text. If the maximum downlink packet length is in the monitored downlink packet,

And receive the HTTP/1.x OK key field and re-detect the MTU

Value, if the HTTP/1.x OK field or the upstream packet ACK acknowledgment message is not received within the TCP timeout period, the MTU is re-detected.

The value is searched in turn according to the rules of the half-find method.

In the sixth step, the MTU1 value at the final search point of the binary search method is set to the router, and the first time after the first power-on, the first step is to search for the minimum MTU value in the downlink.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

Example 2

In this embodiment, a device for setting a maximum transmission unit value is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and the description thereof has been omitted. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 5 is a structural block diagram of a device for setting a maximum transmission unit value according to an embodiment of the present invention. As shown in FIG. 5, the device includes:

The receiving module 52 is configured to receive an instruction for instructing the device to be powered on;

The determining module 54 is connected to the receiving module 52, and is configured to determine a minimum and maximum transmission unit MTU value in a downlink between the device and the server;

The setting module 56 is connected to the determining module 54 and configured to set the minimum MTU. The value is set in the device.

Through the above device, since the receiving module 52 receives the instruction set to indicate that the device is powered on, the determining module 54 determines the minimum MTU in the downlink, and the setting module 56 sets the determined minimum MTU value in the device, that is, through the automatic Detecting the minimum MTU value in the downlink, compared with the minimum MTU value of the network node that detects the uplink route in the prior art, the downlink network node MTU is no longer detected, and thus the determined The minimum MTU of the downlink is more accurate, and the problem of the big data packet sent by the server can be received, and the big data packet sent by the server cannot be received by the MTU of the downlink network node in the related art. The problem.

It should be noted that each of the foregoing network nodes has an allowed minimum MTU value, and the largest MTU value among the minimum MTU values is the minimum MTU value in the downlink; that is, the minimum MTU. The value is the maximum message length of a message that can pass through all network nodes in the downlink.

In an embodiment of the present invention, the determining module 54 may be further configured to determine a minimum MTU value by using a Transmission Control Protocol (TCP). Compared with the related art, the uplink MTU value is sent to the server through the ICMP protocol to detect the minimum MTU value in the network node, and the minimum MTU value of the downlink is determined by using the TCP protocol.

In an embodiment of the present invention, the determining module 54 is further configured to determine a maximum MTU value that the device is allowed to set; obtain text content corresponding to the maximum MTU value of the server; wherein the server establishes a TCP connection with the device; If the MTU value set in the device is the maximum MTU value, whether the downlink is connected; and if the judgment result is yes, it is determined that the maximum MTU value allowed to be set is the minimum MTU value.

It should be noted that, in the case that the MTU value set in the device is the maximum MTU value, whether the downlink is connected may be: detecting a downlink packet that interacts with the server; and determining a maximum downlink in the downlink packet. Whether the length of the packet is the maximum MTU value; whether the end identifier of the text content transmission is received within a predetermined time; wherein the maximum downlink packet length is the maximum MTU value, and the end identifier is received within the predetermined time. Next, determine the device In the case where the MTU value set in the middle is the maximum MTU, the downlink is connected. That is, if the maximum MTU value allowed by the device enables the downlink to be connected to that one, it can directly determine that the minimum MTU value (final MTU value) of the downlink is the above-mentioned allowable MTU value.

It should be noted that if the end identifier of the text content transmission and/or the uplink packet ACK acknowledgement message are not received within the predetermined time, the minimum MTU value in the downlink should be smaller than the maximum MTU value, and further determination is needed. Therefore, in an embodiment of the present invention, the determining module 54 may be further configured to determine that the MTU value set in the device is the maximum MTU value, and if the downlink is not connected, determine that the MTU value is smaller than the maximum MTU value. a first MTU value of the first predetermined value; determining whether the downlink is connected if the MTU value set in the device is the first MTU value; and in the case where the determination result is that the downlink is connected, In the following manner, determining a minimum MTU value: determining whether the downlink is connected if the MTU value set in the device is the first intermediate value between the maximum MTU value and the first MTU value; If the MTU value set in the value is the first intermediate value between the maximum MTU value and the first MTU value, if the downlink is connected, continue to determine that the MTU value set in the device is the first intermediate value. In the case of the second intermediate value between the maximum MTU values, whether the downlink is connected; repeating the above-mentioned determination process of taking the intermediate value until the previous judgment result is that the downlink is connected to the corresponding intermediate value and after In a case where the result of the determination is that the difference between the intermediate values corresponding to the downlink non-coupling is less than the second predetermined value, the corresponding intermediate value of the previous determination result that the downlink is connected is determined to be the minimum MTU value.

It should be noted that the foregoing first intermediate value may be any value between the maximum MTU value and the first MTU value, and may be an average value of the maximum MTU value and the first MTU value, but is not limited thereto. Similarly, the second intermediate value may be any value between the first intermediate value and the maximum MTU value, or may be an average value of the maximum MTU value and the first intermediate value, but is not limited thereto.

It should be noted that, if it is determined that the MTU value set in the device is the second intermediate value between the first intermediate value and the maximum MTU value, whether the downlink is connected may include: detecting a downlink report interacting with the server. Determining whether the maximum downlink packet length in the downlink packet is the second intermediate value; detecting whether the end identifier of the text content transmission is received within the predetermined time; The downlink connection is determined when the maximum downlink packet length is the second intermediate value and the end identifier of the text content transmission is received within a predetermined time.

In an embodiment of the present invention, the determining module 54 may further be configured to continue to determine a third MTU value that is smaller than the first MTU value by a third predetermined value if the determination result is that the downlink is not connected, and Continuing to determine whether the downlink is connected when the MTU value set in the device is the third MTU value, and repeatedly performing the above process of taking the third MTU value and determining whether the downlink is connected, until the judgment result is downlink. The path is connected, and the first MTU value is used as the maximum MTU value. The minimum MTU value is determined by determining the minimum MTU value in the case where the determination result is that the downlink is connected.

The determining module 54 is further configured to detect a downlink packet that interacts with the server, determine whether a maximum downlink packet length in the downlink packet is a second intermediate value, and detect whether an end identifier of the text content transmission is received within a predetermined time. Wherein, in a case where the maximum downlink message length is the second intermediate value, and the end identifier of the text content transmission is completed within a predetermined time, the downlink connection is determined.

Through the above device, the determination speed of the minimum MTU value is improved, and the accuracy of determining the minimum MTU value of the downlink is also improved.

It should be noted that the first predetermined value, the second predetermined value, and the third predetermined value may be determined according to actual conditions, but are not limited thereto.

It should be noted that the foregoing device may be located in the terminal, or may be located in the device, such as a router, but is not limited thereto.

For a better understanding of the invention, the invention is further explained in conjunction with the preferred embodiments.

The device for automatically detecting the MTU value of the network is provided by the preferred embodiment of the present invention. The router is connected to the server through the TCP protocol, and the wget command is used to obtain the text content of the server, and the size of the downlink packet is monitored, whether the packet sent by the server is received, According to the HTTP/1.x OK key field, it is judged whether the connection ends three conditions, and the half-find search method is used to find the minimum MTU value of all network nodes in the downlink.

The above device comprises an initialization module, an MTU value configuration module, a connection server module, and a downlink message monitoring MTU calculation module.

FIG. 6 is a schematic diagram of steps performed by an initialization module according to a preferred embodiment of the present invention. As shown in FIG. 6 , the main content of the initialization module is to restore the configuration default service domain name after the router is started, and configure the initial MTU value of the router. MTU0.

7 is a schematic diagram of steps performed by an MTU value configuration module according to a preferred embodiment of the present invention. As shown in FIG. 7, the MTU value configuration module mainly completes the MTU provided by the initialization module and the downlink packet monitoring MTU calculation module, and is configured to In the router.

FIG. 8 is a schematic diagram of steps performed by a connection server module according to a preferred embodiment of the present invention. As shown in FIG. 8, the main content of the connection server module is to determine whether the current device is the first time for dial-up networking, and if so, Connect to the server through the wget command, and obtain the text content from the server, and provide the IP address corresponding to the server domain name and the source and destination ports of the established tcp to monitor the MTU calculation module for the downlink packet.

9 is a schematic diagram of steps performed by a downlink message monitoring MTU calculation module according to a preferred embodiment of the present invention. As shown in FIG. 9, the downlink message monitoring MTU calculation module mainly monitors a tcp connection established between a connection server module and a server. The tcp connection to be monitored is determined by connecting the IP corresponding to the server domain name provided by the server module and the source and destination ports of the established tcp. The downlink packet monitoring MTU calculation module determines the configuration of the current MTU value configuration module by monitoring the size of the downlink packet, whether it receives the packet sent by the server, and determining whether the connection is terminated according to the HTTP/1.x OK key field. Whether the MTU is the final MTU value. If it is, the end of the half-find loop is completed and the automatic detection ends. If not, provide a new MTU that needs to be detected to configure the MTU value configuration module into the router, and notify the connection server module to reconnect to the server and obtain the text content on the server.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination. The forms are located in different processors.

Example 3

Also provided in the embodiment is an apparatus including the setting means of the maximum transmission unit value in the above embodiment 2. It should be noted that, for the explanation of the above-mentioned setting device of the maximum transmission unit value, refer to the explanation in Embodiment 2, and details are not described herein again.

Example 4

Embodiments of the present invention also provide a storage medium. Alternatively, in the present embodiment, the above storage medium may be set to store program code for executing the steps of the method in Embodiment 1.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

Optionally, in the embodiment, the processor performs the steps of the method in Embodiment 1 according to the stored program code in the storage medium.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Where in the essence of the invention Any modifications, equivalent substitutions, improvements, etc. made within the principles of God and the principles are intended to be included within the scope of the present invention.

Claims (13)

A method for setting a maximum transmission unit value, including: Receiving an instruction for instructing the device to boot up; Determining a minimum maximum transmission unit MTU value in a downlink between the device and the server; The determined minimum MTU value is set in the device. The method of claim 1, wherein determining a minimum MTU value in the downlink between the device and the server comprises: The minimum MTU value is determined by a Transmission Control Protocol TCP. The method of claim 2, wherein determining the minimum MTU value by the transmission control protocol TCP comprises: Determining a maximum MTU value that the device is allowed to set; Obtaining text content of the server corresponding to the maximum MTU value; wherein a TCP connection is established between the server and the device; Determining whether the downlink is connected if the MTU value set in the device is the maximum MTU value; In the case where the determination result is YES, it is determined that the maximum MTU value allowed to be set is the minimum MTU value. The method according to claim 3, wherein, after determining whether the MTU value set in the device is the maximum MTU value, whether the downlink is connected, the method further includes: In a case where the MTU value set in the device is the maximum MTU value, if the downlink is not connected, determining that the first predetermined value is smaller than the maximum MTU value First MTU value; If the MTU value set in the device is the first MTU value, determining whether the downlink is connected; If the result of the determination is that the downlink is connected, the minimum MTU value is determined by determining that the MTU value set in the device is the maximum MTU value and the first MTU value. In the case of the first intermediate value, whether the downlink is connected; the result of the determination is that the MTU value set in the device is between the maximum MTU value and the first MTU value. In the case of an intermediate value, if the downlink is connected, continue to determine that the MTU value set in the device is a second intermediate value between the first intermediate value and the maximum MTU value. If the downlink is connected, the process of determining the intermediate value is repeated until the previous determination result is that the downlink is connected to the corresponding intermediate value and the subsequent determination result is the downlink. In a case where the difference between the intermediate values of the link disconnection is less than the second predetermined value, determining that the previous judgment result is that the corresponding intermediate value of the downlink is connected is the minimum MTU value. The method according to claim 4, wherein, after determining whether the MTU value set in the device is the first MTU value, whether the downlink is connected, the method further includes: If the result of the determination is that the downlink is not connected, continue to determine a third MTU value that is smaller than the first MTU value by a third predetermined value, and continue to determine that the MTU value set in the device is In the case of the third MTU value, whether the downlink is connected, repeating the process of taking the third MTU value and determining whether the downlink is connected, until the result of the determination is that the downlink is connected, Using the first MTU value as the maximum MTU value, determining the minimum MTU value by determining the minimum MTU value in a case where the determination result is that the downlink is connected. The method of claim 4 wherein said determining said first intermediate value In the case of the second intermediate value between the maximum MTU value, whether the downlink is connected includes: Detecting a downlink message that interacts with the server; Determining whether the maximum downlink packet length in the downlink packet is the second intermediate value; Detecting whether an end identifier of the text content transmission is received within a predetermined time; And determining, in the case that the maximum downlink packet length is the second intermediate value, and receiving the end identifier within the predetermined time, determining the downlink connectivity. A setting device for a maximum transmission unit value, comprising: a receiving module, configured to receive an instruction for instructing the device to be powered on; a determining module configured to determine a minimum maximum transmission unit MTU value in a downlink between the device and the server; A setting module is arranged to set the determined minimum MTU value in the device. The apparatus of claim 7, wherein the determining module is further configured to determine the minimum MTU value by a transmission control protocol TCP. The apparatus of claim 8, wherein the determining module is further configured to determine a maximum MTU value that the device is allowed to set; obtain text content of the server corresponding to the maximum MTU value; wherein the server Establishing a TCP connection with the device; determining whether the downlink is connected if the MTU value set in the device is the maximum MTU value; and determining if the determination result is yes, determining The maximum MTU value allowed to be set is the minimum MTU value. The apparatus according to claim 9, wherein said determining module is further configured to: if the MTU value set in said device is a maximum MTU value, said downlink If the path is not connected, determining a first MTU value that is smaller than the maximum MTU value by a first predetermined value; and determining that the MTU value set in the device is the first MTU value, the downlink Whether it is connected; and if the result of the determination is that the downlink is connected, determining the minimum MTU value by determining that the MTU value set in the device is the maximum MTU value and the first In the case of a first intermediate value between the MTU values, whether the downlink is connected; in the judgment result, the MTU value set in the device is the maximum MTU value and the first MTU value. In the case of the first intermediate value, if the downlink is connected, continue to determine that the MTU value set in the device is between the first intermediate value and the maximum MTU value. In the case of two intermediate values, whether the downlink is connected; the above-mentioned determination process of taking the intermediate value is repeatedly performed until the previous judgment result is that the downlink is connected to the corresponding intermediate value and the subsequent judgment result Corresponding to the downlink disconnection When the difference is smaller than a second predetermined value between the intermediate value, determining that the previous determination result of the downlink communication is an intermediate value corresponding to the minimum MTU value. The apparatus according to claim 10, wherein said determining module is further configured to continue to determine a third predetermined value smaller than said first MTU value if said determination result is that said downlink is not connected And the third MTU value, and the continuation of determining whether the MTU value set in the device is the third MTU value, whether the downlink is connected, repeatedly performing the foregoing taking the third MTU value, and determining the downlink Whether the process is connected until the determination result is that the downlink is connected, and the first MTU value is used as the maximum MTU value, and the foregoing is determined when the determination result is that the downlink is connected. The manner of the minimum MTU value determines the minimum MTU value. The apparatus according to claim 10, wherein the determining module is further configured to detect a downlink message that interacts with the server; and determine whether a maximum downlink message length in the downlink message is the second intermediate value And detecting an end identifier of whether the text content transmission is completed within a predetermined time; wherein the maximum downlink message length is the second intermediate value, and the end identifier is received within the predetermined time in the case of, The downlink connectivity is determined. An apparatus comprising: the apparatus of any one of claims 7 to 12.

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