CN114710399A - Method and system for hot standby and capacity expansion of forward network gate - Google Patents
Method and system for hot standby and capacity expansion of forward network gate Download PDFInfo
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- CN114710399A CN114710399A CN202210386068.2A CN202210386068A CN114710399A CN 114710399 A CN114710399 A CN 114710399A CN 202210386068 A CN202210386068 A CN 202210386068A CN 114710399 A CN114710399 A CN 114710399A
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- gatekeeper
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/90—Buffering arrangements
- H04L49/9057—Arrangements for supporting packet reassembly or resequencing
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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
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
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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
- H04L63/04—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
Abstract
The invention discloses a method and a system for hot standby and capacity expansion of a forward gatekeeper, which are characterized in that an inner forward gatekeeper connection management device and an outer forward gatekeeper connection management device are configured and initialized according to the number of forward gatekeeper devices, an application program client is connected with the inner forward gatekeeper connection management device, data needing forward transmission is subjected to message sequence packet and is encrypted according to encryption requirements, load balancing is carried out on the packed and encrypted data according to the quantity of the forward gatekeeper equipment, the capacity expansion of the forward gatekeeper is realized, the influence of communication caused by the failure of the forward gatekeeper is avoided, then the data after load balancing is recombined and decrypted through the data after being transmitted to the gatekeeper equipment, by load balancing after the bidirectional data packet is packaged, the capacity expansion of system transmission can be effectively realized, the development requirement of the system on network bandwidth is met, and the stability of system communication is improved.
Description
Technical Field
The invention relates to the field of forward gatekeeper data transmission and safety, in particular to a method and a system for hot standby and capacity expansion of a forward gatekeeper.
Background
In order to secure data in an electric power system, networks are divided into different security levels. When data transmission is required to be carried out from a high-risk level network to a low-risk level network, a forward gatekeeper physical isolation device is required to be added.
The forward gatekeeper ensures that data of two security levels are exchanged in a single item, and the data flows from a high security level to a low security level. The representation layer and the application layer data are completely transmitted in a single item, TCP response is forbidden to carry data content, and a forward network gate does not support penetrating TCP connection, namely two gateways are forbidden to directly establish TCP link, and the TCP link between the inner application gateway and the outer application gateway is decomposed into two TCP virtual links of the inner application gateway and the outer application gateway to the inner network card and the outer network card of the isolation device respectively. The two network cards inside and outside the forward network gate are physical hardware devices which are not in network link inside the device and only allow data to be transmitted in one direction.
Based on physical hardware devices, the bandwidth of the gatekeeper is naturally limited and causes the gatekeeper link to break when the gatekeeper fails. Affecting normal operation. Therefore, in general, in the case of using a gatekeeper, the following solutions are used:
1. and the forward gatekeeper with larger bandwidth is replaced to ensure that enough network bandwidth is available. Although this can solve part of the problems, there is an upper limit as a hardware product, and it may not meet the development changes of network bandwidth of future systems.
2. When the forward gatekeeper has a fault, a sound alarm is carried out or the user is informed in the form of a short message or a WeChat, so that the gatekeeper with the problem is repaired as soon as possible. However, the user response is not timely, which causes unpredictable problems such as long-time interruption of data communication.
Both the two schemes can not really solve the self defect of the network gate equipment, and the requirements in practical application are difficult to meet.
Disclosure of Invention
The invention aims to provide a method and a system for hot standby and capacity expansion of a forward network gate, so as to overcome the defects of the prior art.
A method for hot standby and capacity expansion of a forward network gate comprises the following steps:
s1, according to the number of the forward gatekeeper devices, an inner forward gatekeeper connection management device and an outer forward gatekeeper connection management device are prepared and initialized, and the application program client is connected with the inner forward gatekeeper connection management device;
s2, performing packet sequence packaging on data needing forward transmission, encrypting according to encryption requirements, and performing load balancing on the packaged and encrypted data according to the number of forward gatekeeper devices;
and S3, recombining and decrypting the data after load balancing through the data after being transmitted to the gatekeeper device, thereby completing the transmission of the user data.
Further, the inner forward gatekeeper connection management device and the outer forward gatekeeper connection management device acquire the working state of the forward gatekeeper device in real time, and load balancing is performed according to the working state of the forward gatekeeper device.
Further, the encryption compression parameters of the encryption module in the inner forward gatekeeper connection management device are initialized, the log callback function and the received data callback function are registered, and the inner forward gatekeeper connection management module is initialized to be connected with the forward gatekeeper device.
And further, calling an interface of an external user interface module in the external forward gateway connection management equipment, registering a log callback function and a received data callback function, and initializing the external forward gateway connection management module to be connected with the forward gateway equipment.
Further, packet sequence packing is performed on the data, and serial number marks are added to each data packet to be transmitted, so as to identify the transmission sequence of the packets. .
Further, the message is encrypted and compressed or directly transmitted according to the initialization parameters of the user, and if the compression is started, the message is compressed; and if the encryption is started, encrypting the message.
And further, selecting a network gate channel with the minimum load to transmit data according to the current number of transmission bytes waiting for each network gate channel and the accumulated number of transmission bytes.
Further, the data after load balancing is transmitted through the forward gatekeeper equipment is recombined according to the ring queue.
A system for hot standby and capacity expansion of a forward gatekeeper comprises an inner forward gatekeeper connection management device and an outer forward gatekeeper connection management device;
the inner forward gatekeeper connection management equipment comprises an inner user interface module, a message sequence group packaging module, an encryption module, a load balancing module and an inner forward gatekeeper connection management module, wherein the inner user interface module is used for connecting an application program client to acquire data sent by the client;
the outer side forward gatekeeper connection management device comprises an outer side user interface module, a message sequence recombination module, a decryption module and an outer side forward gatekeeper connection management module, wherein the outer side user interface module is used for connecting a data server, the outer side forward gatekeeper connection management module is used for receiving data transmitted by the forward gatekeeper in a hot standby mode, and the message sequence recombination module and the decryption module are respectively used for carrying out message sequence recombination and encryption on the data received by the outer side forward gatekeeper connection management module and then transmitting the data to the server through the outer side user interface module.
Further, the inner forward gatekeeper connection management device and the outer forward gatekeeper connection management device acquire the working state of the forward gatekeeper device in real time, and load balancing is performed according to the working state of the forward gatekeeper device.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to a method for hot standby and capacity expansion of a forward gatekeeper, which is characterized in that an inner forward gatekeeper connection management device and an outer forward gatekeeper connection management device are configured and initialized according to the quantity of forward gatekeeper devices, an application program client is connected with the inner forward gatekeeper connection management device, data needing forward transmission is subjected to message sequence packet and is encrypted according to encryption requirements, load balancing is carried out on the packed and encrypted data according to the quantity of the forward gatekeeper equipment, the capacity expansion of the forward gatekeeper is realized, the influence of communication caused by the failure of the forward gatekeeper is avoided, then the data after load balancing is recombined and decrypted through the data after being transmitted to the gatekeeper equipment, by load balancing after the bidirectional data packet is packaged, the capacity expansion of system transmission can be effectively realized, the development requirement of the system on network bandwidth is met, and the stability of system communication is improved.
Furthermore, the inner forward gatekeeper connection management device and the outer forward gatekeeper connection management device acquire the working state of the forward gatekeeper device in real time, and load balancing is performed according to the working state of the forward gatekeeper device, so that hot standby of the gatekeeper can be realized, and the system maintenance efficiency is improved.
Furthermore, packet sequence packing is carried out on the data, and serial number marks are added to each data packet needing to be transmitted, so that the transmission sequence of the packets is identified, and the accuracy of data transmission is improved.
Drawings
Fig. 1 is a schematic diagram of a system structure according to an embodiment of the present invention.
FIG. 2 is a flow chart of a method in an embodiment of the invention.
FIG. 3 is a diagram illustrating group packing logic in accordance with an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The purpose is to break the limitation of the gatekeeper hardware to the bandwidth, and when part of the gatekeeper fails, the normal work of the user is not affected. The most important of the hot standby and capacity expansion of the forward network gate is the parallel coordination scheduling of the multiple network gates.
Referring to fig. 1 and 2, which are schematic diagrams of an overall structure of forward gatekeeper hot standby and capacity expansion, a user may deploy one or more gatekeeper devices according to a requirement of an application service on a network bandwidth.
The invention provides a method for hot standby and capacity expansion of a forward network gate, which specifically comprises the following steps:
s1, according to the number of the forward gatekeeper devices, an inner forward gatekeeper connection management device and an outer forward gatekeeper connection management device are prepared and initialized, and the application program client is connected with the inner forward gatekeeper connection management device;
preparing a plurality of forward gatekeeper devices for adaptation and debugging, and initializing an interface through data transmitted by the forward gatekeeper devices, wherein at the moment, the forward gatekeeper connection management device positioned inside the forward gatekeeper devices firstly starts a server to directly establish connection with an application program client, then the application program client in the forward gatekeeper connection management device positioned inside the forward gatekeeper devices is connected with a data server in the forward gatekeeper connection management device positioned outside the forward gatekeeper devices, and the data server in the forward gatekeeper connection management device positioned outside the last is connected with data.
S2, packet sequence packing and encryption are carried out on the data needing forward transmission, and load balancing is carried out on the packed and encrypted data according to the number of the forward gatekeeper devices;
specifically, as shown in fig. 1, the inside forward gatekeeper connection management device includes an inside user interface module, a packet sequence group module, an encryption module, a load balancing module, and an inside forward gatekeeper connection management module, where the inside user interface module is used to connect to an application client, initialize a _ init () interface of the user interface module, and then initialize the packet sequence group module, the encryption module, and the load balancing module;
the outer side forward gatekeeper connection management equipment comprises an outer side user interface module, a message sequence recombination module, a decryption module and an outer side forward gatekeeper connection management module, wherein the outer side user interface module is used for connecting a data server;
the inner forward gatekeeper connection management module acquires the number of connected forward gatekeeper devices and the working state of the forward gatekeeper devices at the same time, if one or more of the forward gatekeeper devices fail due to unknown factors, the stability and integrity of the gatekeeper transmission link on data transmission cannot be influenced as long as one forward gatekeeper device can work normally, and the gatekeeper which has the fault is notified to be maintained at the first time, so that the normal state is recovered; and load balancing is carried out according to the working state of the forward network gate equipment, so that the problem that the forward network gate equipment with a fault waits for sequencing during transmission is avoided.
Step 101: the application program client 1 is started, calls an _ init () interface of the internal test user interface module 2, initializes the encryption compression parameters of the encryption module, registers a log callback function _ log _ callback () and a received data callback function _ recv _ callback (), initializes the basic setting of the connection of the inside forward gatekeeper connection management module and the forward gatekeeper equipment, and initializes the inside forward gatekeeper connection management module 6 according to the equipment number of the forward gatekeeper.
Step 102: the data server 12 starts up, calls the _ init () interface of the outside user interface module 11, registers the log callback function _ log _ callback () and the received data callback function _ recv _ callback (), initializes the basic setting of the outside forward gatekeeper connection management module connected with the forward gatekeeper equipment, and initializes the outside forward gatekeeper connection management module 8 according to the equipment number of the forward gatekeeper; the initialization of the data link is completed.
Step 103: the application program client 1 calls the user interface _ send _ data () to send data, the message sequence group packaging module 3 performs message sequence group packaging on the data (data), and a serial number mark is added to each data packet to be transmitted for identifying the transmission sequence of the message.
Step 104: then the encryption compression module determines whether to encrypt and compress the message according to the initialization parameters of the user; if the compression is started, the message is compressed to reduce the size of network transmission data and improve the data transmission efficiency; if the encryption is started, the message is encrypted so as to improve the security of data transmission.
Because the load balancing and encryption and decryption are started, when data needs to send a simple instruction which does not occupy the bandwidth, the load balancing and encryption operation is not needed, and when the data sends a large file and needs continuous bandwidth-occupying instructions; and intercepting and repacking the flow of the operation by using the load balancing module, carrying out load balancing and encryption processing according to the requirement, and distributing the flow through links of the plurality of forward gatekeeper devices.
Step 105: and the load balancing module selects a network gate channel with the minimum load to transmit data according to the current number of transmission bytes waiting for each network gate channel and the accumulated number of transmission bytes.
Step 106: the inner forward gatekeeper connection management module 6 transmits the data message after load balancing to the outer forward gatekeeper connection management module 8 through the forward gatekeeper device 7; meanwhile, the inner forward gatekeeper connection management module 6 and the outer forward gatekeeper connection management module 8 are used for hot standby of forward gatekeeper equipment, when a certain gatekeeper equipment fault is found, the equipment fault is reported through logs, and when the equipment fault is recovered, the connection link is automatically recovered and available.
And S3, recombining and decrypting the data after load balancing through the data after being transmitted to the gatekeeper device, thereby completing the transmission of the user data.
Step 201: after the outer forward gatekeeper connection management module 8 receives the data message, the message sequence recombination module 9 recombines the sequence of the message.
Because the data transmission and reception message sequences on both sides of the gateway may be inconsistent after the data is transmitted through the multi-way gateway, the ring queue shown in fig. 3 is used to perform message sequence reassembly. As shown in fig. 3, when the number 1, the number 3, and the number 4 messages are received in the ring queue, the number 1 message is taken out for further processing, and the number 3 and the number 4 messages are not taken out because it is necessary to wait for the number 2 message. When the number 2 message reaches, the number 2, 3 and 4 messages are taken out for further processing.
Step 202: the message after the message sequence recombination is decrypted or decompressed in the decryption and decompression module 10 according to whether the message is encrypted or compressed, so as to obtain the data transmitted by the user.
Step 203: after the data transmitted by the user is obtained in the previous step, the data callback interface _ recv _ callback () registered by the data server 12 in the user interface module 11 is called, and the user data is returned to the data server 12, so that a complete data transmission process is completed.
The method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for hot standby and capacity expansion of a forward network gate is characterized by comprising the following steps:
s1, according to the number of the forward gatekeeper devices, an inner forward gatekeeper connection management device and an outer forward gatekeeper connection management device are prepared and initialized, and the application program client is connected with the inner forward gatekeeper connection management device;
s2, performing packet sequence packaging on data needing forward transmission, encrypting according to encryption requirements, and performing load balancing on the packaged and encrypted data according to the number of forward gatekeeper devices;
and S3, the data after load balancing is transmitted to the gatekeeper equipment through the forward direction is recombined and decrypted, thereby completing the transmission of the user data.
2. The method according to claim 1, wherein the inner forward gatekeeper connection management device and the outer forward gatekeeper connection management device obtain the operating state of the forward gatekeeper device in real time, and perform load balancing according to the operating state of the forward gatekeeper device.
3. The method as claimed in claim 1, wherein the encryption compression parameters of the encryption module in the inner forward gatekeeper connection management device are initialized, the log callback function and the received data callback function are registered, and the inner forward gatekeeper connection management module is initialized to connect the forward gatekeeper device.
4. The method as claimed in claim 1, wherein the method calls an interface of an external user interface module in the external forward gatekeeper connection management device, registers a log callback function and a received data callback function, and initializes the external forward gatekeeper connection management module to connect with the forward gatekeeper device.
5. The method as claimed in claim 1, wherein the data is subjected to packet sequence packing, and a serial number mark is added to each data packet to be transmitted, so as to identify the transmission sequence of the packet.
6. The method according to claim 1, wherein the message is encrypted and compressed or directly transmitted according to initialization parameters of a user, and if the compression is started, the message is compressed; and if the encryption is started, encrypting the message.
7. The method of claim 1, wherein a gateroad with a minimum load is selected for data transmission according to a current number of bytes waiting for transmission and a cumulative number of bytes transmitted for each gateroad.
8. The method for hot standby and capacity expansion of the forward gatekeeper according to claim 1, wherein the data after the load balancing is transmitted through the forward gatekeeper device is reassembled according to a circular queue.
9. A system for hot standby and capacity expansion of a forward gatekeeper is characterized by comprising an inner forward gatekeeper connection management device and an outer forward gatekeeper connection management device;
the inner forward gatekeeper connection management equipment comprises an inner user interface module, a message sequence group packaging module, an encryption module, a load balancing module and an inner forward gatekeeper connection management module, wherein the inner user interface module is used for connecting an application program client to acquire data sent by the client;
the outer side forward gatekeeper connection management device comprises an outer side user interface module, a message sequence recombination module, a decryption module and an outer side forward gatekeeper connection management module, wherein the outer side user interface module is used for connecting a data server, the outer side forward gatekeeper connection management module is used for receiving data transmitted by the forward gatekeeper in a hot standby mode, and the message sequence recombination module and the decryption module are respectively used for carrying out message sequence recombination and encryption on the data received by the outer side forward gatekeeper connection management module and then transmitting the data to the server through the outer side user interface module.
10. The system according to claim 9, wherein the inner forward gatekeeper connection management device and the outer forward gatekeeper connection management device obtain the operating state of the forward gatekeeper device in real time, and perform load balancing according to the operating state of the forward gatekeeper device.
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| CN202210386068.2A CN114710399A (en) | 2022-04-13 | 2022-04-13 | Method and system for hot standby and capacity expansion of forward network gate |
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| CN202210386068.2A CN114710399A (en) | 2022-04-13 | 2022-04-13 | Method and system for hot standby and capacity expansion of forward network gate |
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