CN109391618B - Method and system for establishing communication link - Google Patents
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- CN109391618B CN109391618B CN201811216811.XA CN201811216811A CN109391618B CN 109391618 B CN109391618 B CN 109391618B CN 201811216811 A CN201811216811 A CN 201811216811A CN 109391618 B CN109391618 B CN 109391618B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/083—Network architectures or network communication protocols for network security for authentication of entities using passwords
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
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- 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]
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- 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]
- H04L69/163—In-band adaptation of TCP data exchange; In-band control procedures
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Abstract
The invention is suitable for the technical field of Internet, and provides a method and a system for establishing a communication link, which comprise the following steps: if the preset dial testing starting condition is met, the task scheduling server determines a dial testing project and acquires a terminal identifier of a task execution terminal matched with the dial testing project; acquiring a communication key associated with the terminal equipment, generating a first Transmission Control Protocol (TCP) message based on the communication key, and sending the first TCP message to the task execution terminal; the task execution terminal determines an associated key corresponding to the communication key according to the communication key in the first TCP message, generates a second TCP message based on the associated key, and sends the second TCP message to the task scheduling server; the task scheduling server verifies the associated key of the second TCP message, and if the associated key of the second TCP message is successfully verified, a dial test instruction is generated based on a dial test project; and the task scheduling server establishes a communication link with the task execution terminal. The invention improves the establishing efficiency of the communication link, thereby improving the efficiency of the dial testing.
Description
Technical Field
The invention belongs to the technical field of internet, and particularly relates to a method and a system for establishing a communication link.
Background
Dial testing, as an important means for testing the integrity of a communication network, how to quickly and effectively perform dial testing directly affects the construction efficiency of the communication network. In the existing dial testing technology, when dial testing needs to be executed, dial testing tasks need to be issued to all task execution terminals through a task scheduling server, and in order to improve the safety of the dial testing process, the task scheduling server needs to detect the legality of the task execution terminals before issuing the dial testing tasks. Therefore, before the dial test is executed, the task scheduling server and the task execution terminal need to pass through: the communication link three-way handshake-network authentication-authentication result confirmation and other processes have long data link establishment time, and particularly when the dial test tasks are more, the task scheduling server needs to frequently establish communication with the task execution terminal to test the project content, so that the dial test efficiency is greatly reduced.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and a system for establishing a communication link, so as to solve the problems that in the existing dial testing technology, the data link establishment time is long, and particularly when there are many dial testing tasks, the task scheduling server needs to frequently establish a call with the task execution terminal to perform a test item content, thereby greatly reducing the efficiency of the dial testing.
A first aspect of an embodiment of the present invention provides a method for establishing a communication link, including:
if the preset dial testing starting condition is met, the task scheduling server determines a dial testing project based on the dial testing starting condition and acquires a terminal identifier of a task execution terminal matched with the dial testing project;
the task scheduling server acquires a communication key associated with the terminal identifier, generates a first Transmission Control Protocol (TCP) message based on the communication key, and sends the first TCP message to the task execution terminal;
the task execution terminal determines an associated key corresponding to the communication key according to the communication key in the first TCP message, generates a second TCP message based on the associated key, and sends the second TCP message to the task scheduling server;
the task scheduling server verifies the associated key of the second TCP message, and if the verification result is successful, a dial testing instruction is generated based on the dial testing item;
and the task scheduling server sends a third TCP message carrying the dial test instruction to the task execution terminal and establishes a communication link with the task execution terminal.
A second aspect of the embodiments of the present invention provides a dial testing task scheduling system, where the dial testing task scheduling system includes: the system comprises a task scheduling server and at least one task execution terminal;
the task scheduling server is used for determining a dial testing project based on a preset dial testing starting condition if the preset dial testing starting condition is met, and acquiring a terminal identifier of a task execution terminal matched with the dial testing project;
the task scheduling server is used for acquiring a communication key associated with the terminal identifier, generating a first Transmission Control Protocol (TCP) message based on the communication key, and sending the first TCP message to the task execution terminal;
the task execution terminal is used for determining an associated key corresponding to the communication key according to the communication key in the first TCP message, generating a second TCP message based on the associated key, and sending the second TCP message to the task scheduling server;
the task scheduling server is used for verifying the associated key of the second TCP message, and if the verification result is successful, a dial test instruction is generated based on the dial test item;
and the task scheduling server is used for sending a third TCP message carrying the dial test instruction to the task execution terminal and establishing a communication link with the task execution terminal.
The method and the system for establishing the communication link provided by the embodiment of the invention have the following beneficial effects:
in the embodiment of the invention, the communication key is added into the TCP message in the process of establishing the communication link by performing TCP three-way handshake between the task scheduling server and the task execution terminal, so that the TCP message can be used for ensuring whether the communication link between the task scheduling server and the task execution terminal is communicated or not, and can also complete the operation of legal authentication, the two processes of establishing the communication link and network authentication are unified, the data interaction times between the task scheduling server and the task execution terminal are reduced, the establishing efficiency of the communication link is improved, and the efficiency of dial testing is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is an interactive flowchart of a method for establishing a communication link according to a first embodiment of the present invention;
fig. 2 is a flowchart of a detailed implementation of a method S102 for establishing a communication link according to a second embodiment of the present invention;
fig. 3 is a flowchart illustrating a detailed implementation of a method S103 for establishing a communication link according to a third embodiment of the present invention;
fig. 4 is a flowchart illustrating a specific implementation of a method S102 for establishing a communication link according to a fourth embodiment of the present invention;
fig. 5 is a flowchart of a detailed implementation of a method S101 for establishing a communication link according to a fifth embodiment of the present invention;
fig. 6 is a block diagram of a dial testing task scheduling system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the embodiment of the invention, the communication key is added into the TCP message in the process of establishing the communication link by performing TCP three-way handshake between the task scheduling server and the task execution terminal, therefore, the TCP message can not only be used for ensuring whether the communication link between the task scheduling server and the task execution terminal is communicated, but also can complete the operation of legal authentication, unify the two processes of the establishment of the communication link and the network authentication, reduce the data interaction times between the task scheduling server and the task execution terminal, improve the establishment efficiency of the communication link, thereby improving the efficiency of the dial testing, solving the problems that the existing dial testing technology has long time for establishing data link, particularly, when the number of dial testing tasks is large, the task scheduling server needs to frequently establish a call with the task execution terminal to test the content of the project, so that the dial testing efficiency is greatly reduced.
In the embodiment of the invention, the execution main body of the process is a dial testing task scheduling system, and the dial testing task scheduling system comprises a task scheduling server and at least one task execution terminal. The task execution terminal includes but is not limited to: the computer, the smart phone, the tablet computer and other devices capable of establishing a communication link with the task scheduling server execute the scheduling task issued by the task scheduling server. Fig. 1 shows an interaction flow chart of a method for establishing a communication link according to a first embodiment of the present invention, which is detailed as follows:
in S101, if a preset dial testing start condition is satisfied, the task scheduling server determines a dial testing item based on the dial testing start condition, and obtains a terminal identifier of a task execution terminal that matches the dial testing item.
In this embodiment, when an abnormality occurs in the communication network or a network update is required, an administrator may test the communication network by means of a dial test to determine the cause of the abnormality and detect whether the communication network is available after the abnormality is repaired or the network update is performed. And in the process of executing the dial test, the required task scheduling server sends the dial test task to be tested to the task execution terminal, responds to the corresponding dial test task through the task execution terminal, and feeds back the test result corresponding to the task scheduling server. The task scheduling server needs to perform network authentication on the task execution terminal before executing the dial test, so that the security of the dial test process can be improved. Based on this, in order to improve the dial testing efficiency, the task scheduling server combines the communication link connection process with the network authentication process, so that the data interaction times between the task scheduling server and the task execution terminal can be reduced.
In this embodiment, the task scheduling server may be connected to a plurality of task execution terminals, each task execution terminal may be connected to a plurality of testing machines, each testing machine executes a dial-up test task issued by the task scheduling server, and based on a response condition of each testing machine, generates a test result of the dial-up test terminal, and returns the test result to the task scheduling server through an established legal communication link. The same test machine can be connected with a plurality of task execution terminals, namely, the dial test tasks sent by different task execution terminals are responded in a time division multiplexing mode. The task scheduling server can be a node server built based on Golang, and periodically executes dial testing operation through a preset dial testing trigger rule, so that the completeness of the communication network is periodically detected. When the task scheduling server analyzes the test result and detects that the communication network is abnormal, a network abnormal instruction is sent to the upper computer server so that the upper computer server can process the abnormal condition.
In this embodiment, since there are many test items in the dial testing process, the dial testing start conditions corresponding to different dial testing items may be different. Therefore, when detecting that the current time meets the preset dial testing starting condition, the task scheduling server can identify the dial testing item corresponding to the dial testing starting condition. It should be noted that the corresponding dial testing starting conditions of different dial testing projects may be the same, in this case, the task scheduling server needs to execute a plurality of dial testing projects, and different dial testing projects may be delivered to different task execution terminals for concurrent processing. Of course, if the relevance of different dial test items is high and the test results of other dial test items are relied on, a plurality of dial test items can be processed by the same task execution terminal.
In this embodiment, different dial-up test items may be submitted to corresponding task execution terminals for processing, that is, the task scheduling server may store a corresponding relationship between a dial-up test item and a task execution terminal, and after acquiring the dial-up test item, the task scheduling server may acquire the task execution terminal matched with the dial-up test item based on the corresponding relationship, thereby obtaining a corresponding terminal identifier. It should be noted that the terminal identifier may be information that can be used to indicate the identity of the device, such as a physical address of the task execution terminal, a network address, and a device number in the dial-up test task scheduling system.
In S102, the task scheduling server obtains the communication key associated with the terminal identifier, generates a first TCP packet based on the communication key, and sends the first TCP packet to the task execution terminal.
In this embodiment, the task scheduling server integrates two processes of establishing a network authentication and a communication link, so that the task scheduling server encapsulates a communication key in a TCP (transmission control protocol) message, and determines whether the task execution terminal is a legal device by identifying the communication key in the TCP message in the process of performing a TCP three-way handshake. Specifically, the terminal device determines a communication key associated with the terminal device according to the terminal identifier of the task execution terminal. The communication key may be a static key, that is, a pair of keys are agreed between the task execution terminal and the task scheduling server, and are the communication key stored in the task scheduling server and the associated key stored in the task execution terminal, where the two keys are associated with each other, for example, each character in the communication key may be converted through a preset conversion relationship, so as to obtain the associated key. Therefore, if the task execution terminal can return the associated key based on the communication key, the task scheduling server can be identified as a legal device. Because the communication key can be stolen in the communication process, the communication key is not directly fed back but the associated key of the communication key is returned in the process of the legal verification, and the key conversion algorithm is only stored in the task scheduling server and the task execution terminal and is not transmitted in the communication transmission process, so that the probability of key leakage can be greatly reduced, and the safety of establishing a communication link is improved.
Optionally, in this embodiment, the key between the task scheduling server and the task execution terminal may be dynamically allocated. In this case, the task scheduling server and the task execution terminal are connected to an upper server. The upper server sends down the communication key and the associated key in a preset time period. The communication key and the associated key are sent to the task scheduling server and the task execution terminal in pairs, the communication key and the associated key are valid in the time period, when the next time period is reached, the upper server sends a new pair of keys again, and the communication key and the associated key sent in the previous period are invalid. Therefore, the task scheduling server can obtain the effective communication key in the current time period and send the effective communication key to the task execution terminal, when the task execution terminal receives the communication key, because the upper server sends the dynamic key in pairs, the upper server can inquire the associated key matched with the communication key based on the communication key and send the associated key to the task scheduling server, and the task scheduling server also detects whether the fed-back associated key is matched with the communication key, so that the network authentication process is completed.
In S103, the task execution terminal determines an associated key corresponding to the communication key according to the communication key in the first TCP packet, generates a second TCP packet based on the associated key, and sends the second TCP packet to the task scheduling server.
In this embodiment, when the task execution terminal receives the first TCP packet, it indicates that the task scheduling server and the task execution terminal need to establish a communication link, and execute a dial test procedure, and in order to respond to the first TCP packet and notify the task scheduling server of link connectivity, the task execution terminal generates a second TCP packet based on the first TCP packet.
In this embodiment, the task execution terminal may analyze the communication key included in the first TCP packet, query the association key matched with the communication key, and then encapsulate the association key in the generated TCP packet, preferably, the association key may be stored in a reserved field of the TCP packet, and adjust a bit value of the option field, so that when the task scheduling server receives the second TCP packet, it may determine that the reserved field carries valid data, that is, the association key.
Optionally, the task execution terminal may be connected to a plurality of task scheduling servers, that is, the task execution terminal may store associated keys of different task scheduling servers. In this case, the task execution terminal may determine the server identifier of the task scheduling server based on the source address in the first TCP packet, so as to obtain the associated key matched with the server identifier, and encapsulate the associated key in the second TCP packet.
In S104, the task scheduling server verifies the associated key of the second TCP packet, and if the verification result is successful, a dial test instruction is generated based on the dial test item.
In this embodiment, after receiving the second TCP packet, the task scheduling server may extract the associated key included in the second TCP packet, and identify whether the associated key matches the communication key. Specifically, the task scheduling server may store a verification algorithm, and the task scheduling server may import both the communication key and the associated key into the verification algorithm, and identify whether the communication key and the associated key are matched based on a verification value of the verification algorithm. Optionally, the verification algorithm may be a hash function, the task scheduling server may import the communication key into the hash function, determine a hash value of the communication key, and if the associated key is imported into the hash function, and the output hash value is the same as the hash value of the communication key, identify that the two are matched, that is, the verification is successful; otherwise, if the output hash value is different from the hash value of the communication key, the two are identified to be not matched, namely the verification fails.
In this embodiment, after the task scheduling server identifies that the verification is successful, it indicates that the task execution terminal is a legal device, and may issue a dial test instruction to the task scheduling server to respond to the dial test item. Specifically, the task scheduling server obtains a project identifier of the dial testing project, determines a testing parameter based on the project identifier, and generates a dial testing instruction according to the testing parameter.
In S105, the task scheduling server sends the third TCP packet carrying the dial test instruction to the task execution terminal, and establishes a communication link with the task execution terminal.
In this embodiment, the task scheduling server may add the generated dial test instruction to the third TCP packet, and send the third TCP packet to the task execution terminal, and after sending the third TCP packet, the task scheduling server may identify that the communication link is a legal communication link, and the task execution terminal is also a legal device. After the task execution terminal receives the third TCP message, the task execution terminal also recognizes the communication link as a legal communication link because the three-way handshake operation is completed, extracts the dial test instruction from the third TCP message, and completes the test content corresponding to the dial test item.
It can be seen from the above that, in the method for establishing a communication link according to the embodiment of the present invention, a communication key is added to a TCP message in a process of performing TCP three-way handshake between a task scheduling server and a task execution terminal to establish a communication link, so that the TCP message can be used to ensure whether the communication link between the task scheduling server and the task execution terminal is connected or not, and can also complete the operation of validity authentication, and the two processes of establishing the communication link and network authentication are unified, thereby reducing the number of data interactions between the task scheduling server and the task execution terminal, improving the efficiency of establishing the communication link, and improving the efficiency of dial testing.
Fig. 2 shows a flowchart of a specific implementation of the method S102 for establishing a communication link according to the second embodiment of the present invention. In this embodiment, an execution subject of the flow is a task scheduling server, and referring to fig. 2, the embodiment described with respect to fig. 1, the method S102 for establishing a communication link provided in this embodiment includes: s1021 to S1024 are described in detail as follows:
further, the task scheduling server obtains a communication key associated with the terminal identifier, and generates a first transmission control protocol TCP packet based on the communication key, including:
in S1021, a random key generation algorithm corresponding to the terminal identifier is queried, and an obfuscated encryption key is obtained through the random key generation algorithm.
In this embodiment, the random key generation algorithms corresponding to different task execution terminals may be different, and therefore, the task scheduling server may obtain the random key generation algorithm corresponding to the task execution terminal based on the terminal identifier. Specifically, the random key algorithm of each task execution terminal may be stored in the upper computer server, and the upper computer server may update the random key generation algorithm of each task execution terminal at a preset update period. The task scheduling server can communicate with the upper computer server, and obtains a random key generation algorithm corresponding to the terminal identifier through the upper computer server. It should be noted that, the task execution terminal side may be configured with a key analysis algorithm, where the key analysis algorithm and the random key generation algorithm are two algorithms corresponding to each other, that is, the random key generation algorithm randomly generates a obfuscated encryption key based on a preset key rule, and the key analysis algorithm may identify whether the obfuscated encryption key satisfies the key rule, and if the obfuscated encryption key satisfies the key rule, identify the obfuscated encryption key as a legal key; otherwise, the key is identified as an illegal key and is not matched with the task execution terminal.
In this embodiment, after determining the random key generation algorithm matched with the task execution terminal, the task scheduling server may run the random key generation algorithm, and generate the obfuscated encryption key used in the current communication link process through the random key generation algorithm. It should be noted that the characters included in the obfuscated encryption key are random, and the key length is also random. But the obfuscated encryption key is provided with a minimum key length and a maximum key length, i.e. the key length of the obfuscated encryption key has a fixed range.
In S1022, a key division number is determined according to the character length of the terminal identifier, and the obfuscated encryption key is divided into a plurality of sub-keys based on the division number.
In this embodiment, the task scheduling server needs to perform obfuscation encryption processing on the terminal identifier, so as to send the obfuscated and encrypted terminal identifier to the task execution terminal as a communication key. The task execution terminal stores the terminal identifier of the task execution terminal, namely after the terminal identifier is processed through confusion encryption, if the terminal identifier is sent to a legal task execution terminal, the task execution terminal can still analyze the confusion encryption key in the communication key through the locally recorded terminal identifier. For an illegal task execution terminal, the terminal identifier recorded locally is inconsistent with the terminal identifier of a legal device, so that a confusion encryption key cannot be analyzed through a communication key, and a corresponding associated key cannot be generated. Based on the reasons, the cracking difficulty of the communication key can be improved, so that the safety and the confidentiality of establishing a communication link are improved.
In this embodiment, the task scheduling server may identify a character length of the terminal identifier of the target task execution terminal, and determine the key division number based on the size of the character length. Specifically, if the length of the terminal identifier is longer, in order to better hide the native terminal identifier, the corresponding key division times are more, so that more confusion insertion points can be configured; and the shorter the length of the terminal identifier is, the smaller the corresponding key division times are. After determining the key division number, the task scheduling server may divide the generated obfuscated encryption key by an equal amount to generate a plurality of sub-keys.
Optionally, in this embodiment, the terminal identifier may be formed by a physical address and a network address of the task execution terminal. After querying the physical address of the task execution terminal, the task scheduling server may add the network address to the physical address at the head or tail of the physical address, or even at a preset insertion point, and identify the physical address to which the network address is added as the terminal identifier of the task execution terminal.
In S1023, the plurality of sub-keys are inserted into preset insertion positions in the terminal identifier, and the terminal identifier into which the sub-keys are inserted is identified as the communication key.
In this embodiment, the task scheduling server may determine the number of insertion points according to the key dividing times, and recognize a plurality of insertion positions from the terminal identifier according to the arrangement rule of the insertion points, and then the task scheduling server may add each sub-key to the terminal identifier according to each insertion position, and recognize the terminal identifier into which the sub-key is inserted as the communication key. Preferably, the task scheduling server may determine its corresponding insertion position based on the splitting order of each sub-key, that is, the splitting order of the sub-key is matched with the sequence number of the insertion position.
In S1024, the task scheduling server generates a first transmission control protocol TCP packet based on the communication key.
In this embodiment, the task scheduling server adds the generated communication key to the original first TCP packet, so that the task execution terminal can extract the communication key from the first TCP packet and generate the associated key corresponding to the communication key.
In the embodiment of the invention, the confusion encryption key is generated through a random algorithm, and is divided and inserted into the terminal identifier to generate the communication key, so that the cracking difficulty of the communication key can be improved, and the safety of establishing a communication link is improved.
Fig. 3 shows a flowchart of a specific implementation of the method S103 for establishing a communication link according to the third embodiment of the present invention. In this embodiment, an execution subject of the flow is a task execution terminal, referring to fig. 3, and with respect to the embodiment described in fig. 2, the method S103 for establishing a communication link provided in this embodiment includes: s1031 to S1032 are specifically described as follows:
further, the determining, by the task execution terminal, an association key corresponding to the communication key according to the communication key in the first TCP packet includes:
in S1031, each of the subkeys is extracted from the communication key based on the terminal identifier and the insertion position, and the obfuscated encryption key is restored based on the insertion order of the subkeys.
In this embodiment, after receiving the first TCP packet, the task execution terminal may extract the communication key from the TCP packet. After the communication key is determined, the task execution terminal acquires a local terminal identifier, and acquires the confusingly inserted sub-key from the communication key by comparing the communication key with the terminal identifier. It should be noted that, since the key division algorithm and the key insertion algorithm are agreed in advance between the task scheduling server and the legitimate task execution terminal, the task execution terminal may determine the key division times based on the local terminal identifier, determine the insertion positions of the respective sub-keys based on the key division times, mark the insertion positions after receiving the communication key, and extract the respective sub-keys based on the local terminal identifier.
In this embodiment, the task execution terminal may determine, according to the insertion order of each sub-key in the communication key, the arrangement order of the sub-keys in the obfuscated encryption key, combine the sub-keys based on the arrangement order, and restore to obtain the obfuscated encryption key before splitting.
Optionally, after the task execution terminal restores the obfuscated encryption key, it may be determined whether the obfuscated encryption key is a legal key through a preset key identification algorithm, and if so, the relevant operation of S1032 is executed; otherwise, if the key is an illegal key or the obfuscated encryption key cannot be analyzed through a key identification algorithm, the first TCP message is identified as an illegal message, and no communication connection is established with the task scheduling server.
In S1032, the obfuscated encryption key is imported to a related key generation algorithm, and a related key corresponding to the obfuscated encryption key is generated.
In this embodiment, after the task execution terminal obtains the obfuscated encryption key, the task execution terminal outputs the association key corresponding to the obfuscated encryption key through an association key generation algorithm. Specifically, the associated key generation algorithm may be a hash function, and after the obfuscated encryption key is imported into the hash function, a hash value corresponding to the obfuscated encryption key may be determined, and the hash value is identified as the associated key. Correspondingly, the task scheduling server is also configured with a corresponding associated key generation algorithm, and the task scheduling server can also determine the associated key corresponding to the obfuscated encryption key through the associated key generation algorithm, and after receiving a second TCP message fed back by the task execution terminal, identify whether the locally generated associated key is consistent with the associated key carried in the second TCP message, so as to identify whether the verification is successful.
In the embodiment of the invention, the confusion encryption key is restored through the local terminal identifier, and the corresponding associated key is generated, so that the safety of establishing the communication link can be improved.
Fig. 4 shows a flowchart of a specific implementation of the method S102 for establishing a communication link according to the fourth embodiment of the present invention. In this embodiment, an execution subject of the flow is a task scheduling server, referring to fig. 4, and with respect to the embodiments described in fig. 1 to fig. 3, S102 in the method for establishing a communication link provided in this embodiment includes: s1025 to S1027 are specifically described as follows:
further, the task scheduling server obtains a communication key associated with the terminal identifier, and generates a first transmission control protocol TCP packet based on the communication key, including:
in S1025, the network address of the task execution terminal is acquired, and a native TCP packet is generated based on the network address.
In this embodiment, the task scheduling server may obtain a network address corresponding to the terminal identifier based on the terminal identifier of the task execution terminal, and detect whether a communication link is established between an existing interface and the communication address in each current communication interface, and if so, directly send a dial test instruction through the established communication link; otherwise, if each communication interface does not establish a communication link with the network address, a native TCP message is generated according to the network address and the local network address.
In this embodiment, the value of the option field in the native TCP message is a default value, and the reserved field is also filled with an invalid string.
In S1026, the option field in the native TCP message is set to a preset bit value.
In this embodiment, after the task scheduling server generates the native TCP packet, since the communication key needs to be encapsulated in the TCP packet, in order to enable the communication peer to identify and obtain that the TCP packet carries the communication key, the task scheduling server may adjust the bit value of the option field, and set the option field as the preset bit value. For example, the bit value may be "XX", and when the bit value of the correspondent node identification option field is a non-default value and is "XX", it may be determined that the TCP packet carries the communication key. It should be noted that the preset bit value is a bit value predefined by the task scheduling server and the task execution terminal.
In S1027, the communication key is added to a reserved field in the native TCP packet, and the native TCP packet after the communication key is added and a preset bit value is set is identified as a first TCP packet.
In this embodiment, the task scheduling server adds the generated communication key to a reserved field of the original TCP packet, where the reserved field and the option field are both located at the header of the TCP packet, and the text content of the TCP packet is not changed. The task scheduling server has added the communication key to the TCP message, so that the native TCP message after the communication key is added and the option field is modified can be identified as the first TCP message.
In the embodiment of the invention, the header of the original TCP message is modified, so that the communication key can be added into the TCP message, extra communication overhead is not required, the data volume of the TCP message is reduced, and the transmission efficiency is improved.
Fig. 5 is a flowchart illustrating a specific implementation of a method for establishing a communication link according to a fifth embodiment of the present invention. In this embodiment, an execution subject of the flow is a task scheduling server, referring to fig. 5, and with respect to the embodiments described in fig. 1 to fig. 3, in the method for establishing a communication link provided in this embodiment, S101 includes: s1011 to S1012, detailed description is as follows:
further, the task scheduling server determines a dial testing project based on the dial testing starting condition, and acquires a terminal identifier of a task execution terminal matched with the dial testing project, including:
in S1011, an operation state list related to the task execution terminal is obtained, and the task execution terminal whose operation state is idle is selected as a candidate execution terminal.
In this embodiment, when it is determined that a dial test needs to be performed, the task scheduling server obtains an operation state list, where the operation state list records operation states of each task execution terminal in the dial test scheduling system, and the operation states include an occupied state, an idle state, and a fault state. And when the state of the task execution terminal is changed, the task execution terminal is synchronously updated into the running state list. Therefore, the task scheduling server can determine the current operating state of each task execution terminal according to the operating state list.
In this embodiment, the task scheduling terminal may detect whether there is a task execution terminal whose operation state is idle in the operation state list, and if there is a task execution terminal whose operation state is idle, identify the task execution terminal as a candidate center terminal.
In S1012, executable item information of each candidate execution terminal is queried, and any candidate execution terminal including the dial test item in the executable item information is identified as a task execution terminal matching the dial test item.
In this embodiment, after detecting that there is a task execution terminal in an idle state, the task scheduling server may obtain executable item information of each candidate execution terminal, where the executable item information is used to indicate a dial-up test item that the task execution terminal can respond to, based on which, the task scheduling server may query whether the executable item information includes a dial-up test item obtained by identification, and if so, it indicates that the candidate execution terminal has corresponding capability to complete the dial-up test item, and therefore, the candidate execution terminal is identified as the task execution terminal criticized by the dial-up test item.
In the embodiment of the invention, the task execution terminals criticized with the dial testing project are selected by acquiring the running state and the executable project information of each task execution terminal, so that the response efficiency of the dial testing project is improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Fig. 6 is a block diagram illustrating a structure of a dial testing task scheduling system according to an embodiment of the present invention, where the terminal device includes units for executing steps in the embodiment corresponding to fig. 1. Please refer to fig. 1 and fig. 1 for the corresponding description of the embodiment. For convenience of explanation, only the portions related to the present embodiment are shown.
Referring to fig. 6, the dial testing task scheduling system includes: a task scheduling server 61 and at least one task execution terminal 62;
the task scheduling server 61 is configured to determine a dial testing item based on a preset dial testing starting condition if the preset dial testing starting condition is met, and acquire a terminal identifier of the task execution terminal 62 matched with the dial testing item;
the task scheduling server 61 is configured to obtain a communication key associated with the terminal identifier, generate a first transmission control protocol TCP packet based on the communication key, and send the first TCP packet to the task execution terminal 62;
the task execution terminal 62 is configured to determine, according to the communication key in the first TCP packet, an association key corresponding to the communication key, generate a second TCP packet based on the association key, and send the second TCP packet to the task scheduling server 61;
the task scheduling server 61 is configured to verify the associated key of the second TCP packet, and if the verification result is successful, generate a dial test instruction based on the dial test item;
the task scheduling server 61 is configured to send the third TCP packet carrying the dial test instruction to the task execution terminal 62, and establish a communication link with the task execution terminal 62.
Optionally, the task scheduling server 61 is configured to obtain a communication key associated with the terminal identifier, and generate a first transmission control protocol TCP packet based on the communication key, and includes:
the task scheduling server 61 is configured to query a random key generation algorithm corresponding to the terminal identifier, and obtain a confusion encryption key through the random key generation algorithm;
the task scheduling server 61 is configured to determine the key division number according to the character length of the terminal identifier, and divide the obfuscated encryption key into a plurality of sub-keys based on the division number;
the task scheduling server 61 is configured to insert a plurality of sub-keys into preset insertion positions in the terminal identifier, and identify the terminal identifier into which the sub-keys are inserted as the communication key;
and the task scheduling server 61 is configured to generate a first transmission control protocol TCP packet based on the communication key.
Optionally, the task execution terminal 62 is configured to determine, according to the communication key in the first TCP packet, an association key corresponding to the communication key, and includes:
the task execution terminal 62 is configured to extract each sub-key from the communication key based on the terminal identifier and the insertion position, and restore the obfuscated encryption key based on an insertion order of the sub-keys;
the task execution terminal 62 is configured to introduce the obfuscated encryption key into a correlation key generation algorithm, and generate a correlation key corresponding to the obfuscated encryption key.
Optionally, the task scheduling server 61 is configured to obtain a communication key associated with the terminal identifier, and generate a first transmission control protocol TCP packet based on the communication key, and includes:
the task scheduling server 61 is configured to obtain a network address of the task execution terminal 62, and generate a native TCP packet based on the network address;
the task scheduling server 61 is configured to set an option field in the native TCP message to a preset bit value;
the task scheduling server 61 is configured to add the communication key to a reserved field in the native TCP message, and identify the native TCP message to which the communication key is added and a preset bit value is set as a first TCP message.
Optionally, the task scheduling server 61 is configured to determine a dial testing item based on the dial testing start condition, and obtain a terminal identifier of the task execution terminal 62 matched with the dial testing item, and includes:
the task scheduling server 61 is configured to obtain an operation state list of the task execution terminal 62, and select a task execution terminal whose operation state is idle as a candidate execution terminal;
the task scheduling server 61 is configured to query executable item information of each candidate execution terminal, and identify any candidate execution terminal including the dial test item in the executable item information as a task execution terminal matched with the dial test item.
Therefore, the dial testing task scheduling system provided by the embodiment of the invention can add the communication key to the TCP message in the process of establishing the communication link by performing TCP three-way handshake between the task scheduling server and the task execution terminal, so that the TCP message can be used for not only ensuring whether the communication link between the task scheduling server and the task execution terminal is connected, but also completing the operation of legal authentication, unifying the two processes of establishing the communication link and network authentication, reducing the number of data interaction between the task scheduling server and the task execution terminal, improving the efficiency of establishing the communication link, and thus improving the efficiency of dial testing.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (8)
1. A method for establishing a communication link is applied to a dial testing task scheduling system, and is characterized in that the method for establishing the communication link comprises the following steps:
if the preset dial testing starting condition is met, the task scheduling server determines a dial testing project based on the dial testing starting condition and acquires a terminal identifier of a task execution terminal matched with the dial testing project;
the task scheduling server acquires a communication key associated with the terminal identifier, generates a first Transmission Control Protocol (TCP) message based on the communication key, and sends the first TCP message to the task execution terminal;
the task execution terminal determines an associated key corresponding to the communication key according to the communication key in the first TCP message, generates a second TCP message based on the associated key, and sends the second TCP message to the task scheduling server;
the task scheduling server verifies the associated key of the second TCP message, and if the verification result is successful, a dial testing instruction is generated based on the dial testing item;
the task scheduling server sends a third TCP message carrying the dial test instruction to the task execution terminal, and establishes a communication link with the task execution terminal;
the task scheduling server obtains a communication key associated with the terminal identifier, and generates a first Transmission Control Protocol (TCP) message based on the communication key, wherein the method comprises the following steps:
the task scheduling server inquires a random key generation algorithm corresponding to the terminal identification, and obtains a confusion encryption key through the random key generation algorithm;
the task scheduling server determines the key division times according to the character length of the terminal identifier, and divides the obfuscated encryption key into a plurality of sub-keys based on the division times;
the task scheduling server inserts a plurality of sub-keys into preset insertion positions in the terminal identification, and identifies the terminal identification inserted with the sub-keys as the communication key;
and the task scheduling server generates a first Transmission Control Protocol (TCP) message based on the communication key.
2. The establishing method according to claim 1, wherein the task execution terminal determines an association key corresponding to the communication key according to the communication key in the first TCP packet, including:
the task execution terminal extracts each sub-key from the communication key based on the terminal identification and the insertion position, and restores the obfuscated encryption key based on the insertion sequence of the sub-keys;
and the task execution terminal leads the obfuscated encryption key into an associated key generation algorithm to generate an associated key corresponding to the obfuscated encryption key.
3. The establishing method according to any one of claims 1-2, wherein the task scheduling server obtains a communication key associated with the terminal identifier, and generates a first transmission control protocol TCP packet based on the communication key, including:
the task scheduling server acquires a network address of the task execution terminal and generates a native TCP message based on the network address;
the task scheduling server sets an option field in the native TCP message to a preset bit value;
and the task scheduling server adds the communication key to a reserved field in the original TCP message, and identifies the original TCP message added with the communication key and set with a preset bit value as a first TCP message.
4. The establishing method according to any one of claims 1-2, wherein the task scheduling server determines a dial testing item based on the dial testing start condition, and acquires a terminal identifier of a task execution terminal matched with the dial testing item, including:
the task scheduling server acquires an operation state list related to the task execution terminal, and selects the task execution terminal with an idle operation state as a candidate execution terminal;
and the task scheduling server inquires the executable item information of each candidate execution terminal and identifies any candidate execution terminal containing the dial-up test item in the executable item information as a task execution terminal matched with the dial-up test item.
5. A dial testing task scheduling system, characterized in that the dial testing task scheduling system comprises: the system comprises a task scheduling server and at least one task execution terminal;
the task scheduling server is used for determining a dial testing project based on a preset dial testing starting condition if the preset dial testing starting condition is met, and acquiring a terminal identifier of a task execution terminal matched with the dial testing project;
the task scheduling server is used for acquiring a communication key associated with the terminal identifier, generating a first Transmission Control Protocol (TCP) message based on the communication key, and sending the first TCP message to the task execution terminal;
the task execution terminal is used for determining an associated key corresponding to the communication key according to the communication key in the first TCP message, generating a second TCP message based on the associated key, and sending the second TCP message to the task scheduling server;
the task scheduling server is used for verifying the associated key of the second TCP message, and if the verification result is successful, a dial test instruction is generated based on the dial test item;
the task scheduling server is used for sending a third TCP message carrying the dial test instruction to the task execution terminal and establishing a communication link with the task execution terminal;
the task scheduling server is configured to obtain a communication key associated with the terminal identifier, and generate a first transmission control protocol TCP packet based on the communication key, and includes:
the task scheduling server is used for inquiring a random key generation algorithm corresponding to the terminal identification and obtaining a confusion encryption key through the random key generation algorithm;
the task scheduling server is used for determining the key division times according to the character length of the terminal identifier and dividing the obfuscated encryption key into a plurality of sub-keys based on the division times;
and the task scheduling server is used for inserting the plurality of sub-keys into preset insertion positions in the terminal identification, and identifying the terminal identification inserted with the sub-keys as the communication key.
6. The dial testing task scheduling system according to claim 5, wherein the task execution terminal is configured to determine an associated key corresponding to the communication key according to the communication key in the first TCP packet, and includes:
the task execution terminal is used for extracting each sub-key from the communication key based on the terminal identification and the insertion position, and restoring the obfuscated encryption key based on the insertion sequence of the sub-keys;
and the task execution terminal is used for leading the obfuscated encryption key into a correlation key generation algorithm to generate a correlation key corresponding to the obfuscated encryption key.
7. A dial testing task scheduling system, characterized in that the dial testing task scheduling system comprises: the system comprises a task scheduling server and at least one task execution terminal; the task scheduling server comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, and the processor of the task scheduling server realizes the following steps when executing the computer program:
the task scheduling server is used for determining a dial testing project based on a preset dial testing starting condition if the preset dial testing starting condition is met, and acquiring a terminal identifier of a task execution terminal matched with the dial testing project;
the task scheduling server is used for acquiring a communication key associated with the terminal identifier, generating a first Transmission Control Protocol (TCP) message based on the communication key, and sending the first TCP message to the task execution terminal;
the task scheduling server is used for verifying the associated key of the second TCP message, and if the verification result is successful, a dial test instruction is generated based on the dial test item;
the task scheduling server is used for sending a third TCP message carrying the dial test instruction to the task execution terminal and establishing a communication link with the task execution terminal;
the task scheduling server is configured to obtain a communication key associated with the terminal identifier, and generate a first transmission control protocol TCP packet based on the communication key, and includes:
the task scheduling server is used for inquiring a random key generation algorithm corresponding to the terminal identification and obtaining a confusion encryption key through the random key generation algorithm;
the task scheduling server is used for determining the key division times according to the character length of the terminal identifier and dividing the obfuscated encryption key into a plurality of sub-keys based on the division times;
the task scheduling server is used for inserting the plurality of sub-keys into preset insertion positions in the terminal identification, and identifying the terminal identification inserted with the sub-keys as the communication key;
the task execution terminal comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, and the processor of the task execution terminal realizes the following steps when executing the computer program:
and the task execution terminal is used for determining an associated key corresponding to the communication key according to the communication key in the first TCP message, generating a second TCP message based on the associated key, and sending the second TCP message to the task scheduling server.
8. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method steps as claimed in any one of claims 1 to 4, which are performed by a task scheduling server or a task execution terminal.
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| PCT/CN2018/124627 WO2020077867A1 (en) | 2018-10-18 | 2018-12-28 | Method and system for establishing communication link |
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| CN113220562A (en) * | 2020-02-06 | 2021-08-06 | 北京沃东天骏信息技术有限公司 | Terminal testing method and device, computer storage medium and electronic equipment |
| CN113726830B (en) * | 2020-05-25 | 2023-09-12 | 网联清算有限公司 | Message identifier generation method and device |
| CN112134757B (en) * | 2020-09-21 | 2022-08-19 | 北京信而泰科技股份有限公司 | Message generation method and device |
| CN112202638B (en) * | 2020-09-29 | 2022-03-01 | 北京百度网讯科技有限公司 | Data processing method, device, equipment and computer storage medium |
| CN114143067B (en) * | 2021-11-26 | 2024-04-19 | 天翼视联科技有限公司 | Instruction processing method and system of dial testing system |
| CN115514663B (en) * | 2022-09-23 | 2023-10-27 | 北京奇艺世纪科技有限公司 | Dial testing method, system, device, electronic equipment and storage medium |
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