CN102571761B - Information transmission method of network interface - Google Patents

Abstract

The invention relates to an information transmission method of a network interface, comprising: initializing data packet processing by a main control module, so that the system loads each data packet protocol defined in the data packet processing; the system performs lexical analysis on each input vocabulary; lexical analysis Then perform grammatical analysis to obtain the corresponding semantics; execute the corresponding command action processing according to the obtained semantics, and generate message data according to the data transmission format defined in the data packet processing for the network transmission. The method of the present invention does not need to redefine the format of the data packet, and only needs to define the corresponding grammar and command function according to the unified data format to form the corresponding data packet, thereby simplifying the data structure of network transmission and improving the data packet efficiency. Versatility and flexibility, especially suitable for Socket interaction between broadcasting and television business operation management system and CA (conditional access) system.

Description

Information transmission method of network interface

technical field

The invention relates to an information transmission method, specifically an information transmission method of a network interface, especially suitable for but not limited to the information transmission of a Socket (socket) interface in a CA (conditional access) system.

Background technique

Socket is a network programming interface called socket. Socket is the ultimate socket point for two-way communication between one process and another process. It is the basic mechanism of IPC and heterogeneous machine network interconnection of computer system introduced by Berkeley in Unix system.

The design of the traditional network interface data packet is realized by storing the agreed content in a specified fixed position in the data packet. This method is relatively simple and clear, but it is not flexible enough. When transferring data between different systems and protocols, it often cannot be transplanted or compatible. Therefore, it is necessary to define data transmission formats and protocols separately for different systems, which increases the system. Development cost and complexity of network transmission.

Contents of the invention

In view of the above problems, the present invention provides an information transmission method of a network interface, which does not need to redefine the format of the data packet, defines the corresponding syntax and command functions according to the unified data format to form the corresponding data packet, and simplifies the data transmitted by the network structure to improve the versatility of data packets.

The information transmission method of the network interface of the present invention includes:

Data packet processing: used to define a common data transmission format to form at least one data packet protocol, the fields of the data transmission format include: message start identifier, command length, message ID and command content;

Lexical analysis: according to the lexical analysis tool, define the format of the keyword vocabulary in the command and the keyword vocabulary required to generate the command;

Grammatical analysis: according to the grammatical analysis tool, based on the vocabulary generated by the lexical analysis module, define the correct command composed of the vocabulary, and complete the conversion from IP data to IP command;

Command action processing: including the processing program for commands generated by the syntax analysis module;

Main control module integration processing: including the main frame program, which is used to integrate the above functions into one, and then compile it into an executable program;

Carry out the initialization of data packet processing by the main control module, make the system load each data packet protocol defined in the data packet processing step, and then perform system initialization according to the data packet protocol selected by the user;

After the system receives external input, it performs lexical analysis on each input vocabulary, and if any word is found that does not conform to the defined lexical format, it exits the analysis;

After all the input has passed the lexical analysis, the result is parsed to obtain the corresponding semantics. If it cannot be parsed into a semantic that matches the defined grammatical format, the parsing is exited;

Execute the corresponding command action processing according to the obtained semantics, generate message data according to the data transmission format defined in the data packet processing, and pack the message data into TCP data packets for network transmission.

The method of the invention reintegrates the data in the TCP data packet without changing the structure of the TCP packet, so the data packets transmitted by the method of the invention are universal in the whole network.

Furthermore, in order to make the processing mechanism of the system more perfect and improve the efficiency of data transmission, processing of error commands is included in the processing of command actions to improve the response time of the system.

Usually, since different network transmission scenarios have different protocol requirements, in order to save resources, a preferred solution is that the system divides each data packet protocol defined in the data packet processing step into at least two loads.

Preferably, after the grammatical analysis is successful, a new process is started, and the corresponding command action processing is executed in the new process, so as not to block the external response.

Furthermore, after the message data is transmitted over the network during the command action processing, the system releases the resources that have been called but not released, and exits the current process.

Further, when packing the data packet, the data packet is encrypted with a temporary session key to ensure the security of the data packet.

The method of the present invention does not need to redefine the format of the data packet, and only needs to define the corresponding grammar and command function according to the unified data format to form the corresponding data packet, thereby simplifying the data structure of network transmission and improving the data packet efficiency. Versatility and flexibility, especially suitable for Socket interaction between radio and television business operation management system and CA (conditional access) system.

The above content of the present invention will be further described in detail below in conjunction with the specific implementation manners of the embodiments shown in the accompanying drawings. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following examples. Without departing from the above-mentioned technical idea of the present invention, various replacements or changes made according to common technical knowledge and customary means in this field shall be included in the scope of the present invention.

Description of drawings

Fig. 1 is a flow chart of the information transmission method of the network interface of the present invention.

Detailed ways

As shown in Figure 1, the information transmission method of the network interface of the present invention includes:

Data packet processing: It is used to define a common data transmission format to form a variety of data packet protocols. The fields of the data transmission format include: message start identifier, message header, command length, message ID, command content and message Hash code; where the command The length is variable. For simplicity, define the command length as n×8 (n is an integer). Perform data packet processing according to the defined data transmission format, such as packaging, unpacking, encryption, network monitoring, network connection, etc.

Lexical analysis: according to the lexical analysis tool (such as lex), define the format of the keyword vocabulary in the command and the keyword vocabulary required to generate the command;

Grammatical analysis: according to the grammatical analysis tool (such as yacc), based on the vocabulary generated by the lexical analysis module, define the correct command composed of the vocabulary, and complete the conversion of IP data to IP command;

Command action processing: including the processing program for commands generated by the syntax analysis module and the processing program for error commands;

Main control module integration processing: including the main frame program, which is used to integrate the above functions into one, and then compile it into an executable program;

The header of the data packet in the method of the present invention is consistent with the header of the TCP data packet, but the data part of the TCP data packet is redefined to make it change from data to a command set. The Socket message packet generated by the method of the present invention only replaces the data part in the TCP data packet. Therefore, the data packet of the method of the present invention is a TCP data packet, which can carry out TCP/IP transmission in the whole network.

The data packet processing is initialized by the main control module, so that the system loads each data packet protocol defined in the data packet processing step, and then the system is initialized according to the data packet protocol selected by the user. Since different network transmission scenarios have different protocol requirements, in order to save resources, a preferred solution is that the system divides the data packet protocol into at least two loads.

After the system receives external input, it performs lexical analysis on each input word. If any word is found that does not conform to the defined lexical format, it prints the Log information and exits the analysis. The lexical analysis module can choose existing software.

After all the input has passed the lexical analysis, the result is parsed to obtain the corresponding semantics. If it cannot be parsed into a semantic that matches the defined grammatical format, log information is printed and parsing is exited. The parsing module can choose existing software.

Start a new process, and execute the corresponding command action processing according to the obtained semantics, so as not to block the external response. The execution result is generated according to the data transmission format defined in the data packet processing to generate message data, and the message data and message Hash code are packaged together into a TCP/IP data packet for end-to-end mutual analysis to realize direct transmission of commands. When the message data is packaged, the data package is encrypted with a temporary session key to ensure the security of the data package. After the message data transmission is completed, the resources that have been called but not released by the system are released, and the current process exits.

Claims (6)

1. the information transferring method of network interface, is characterized by and comprise:

Processing data packets: for defining general data transmission format to form at least one data pack protocol, the field of data transmission format comprises: message origin identification, order length, message id and command context;

Morphological analysis: according to lexical analysis tool, the form of keyword vocabulary and the required keyword vocabulary of generation order in definition command;

Syntactic analysis: according to syntactic analysis instrument, the vocabulary generating taking Lexical Analysis Module, as basis, definition forms correct order by described vocabulary, completes the conversion of IP data to IP order;

Command action processing: comprise the handling procedure to order that syntax Analysis Module generates;

Main control module is integrated and is processed: comprise main frame program, for above-mentioned each Function Integration Mechanism is integrated, be then compiled into an executable program;

Carried out the initialization of processing data packets by main control module, make each data pack protocol of defining in system loads processing data packets step, and then the data pack protocol of selecting according to user carries out system initialization;

System receives after outside input, and each vocabulary of input is carried out to morphological analysis, if find that there is word and do not meet the morphology form of definition, exits parsing;

All input, by after morphological analysis, is carried out syntactic analysis by result and is obtained corresponding semanteme, if can not be resolved into the semanteme matching with the syntax format of definition, exits parsing;

The command action processing corresponding according to the semantic execution obtaining, according to the data transmission format generating messages data that define in processing data packets, is bundled to the result of execution in tcp data bag, to carry out Internet Transmission by described message data.

2. the information transferring method of network interface as claimed in claim 1, is characterized by: process in command action the processing comprising bad command.

3. the information transferring method of network interface as claimed in claim 1, is characterized by: system is divided at least twice by the each data pack protocol defining in processing data packets step and loads.

4. the information transferring method of network interface as claimed in claim 1, is characterized by: after syntactic analysis success, open a new process, carry out corresponding command action processing in described new process.

5. the information transferring method of network interface as claimed in claim 1, is characterized by: command action is carried out message data after Internet Transmission in processing, system by modulated use but the resource not discharging discharge, and exit current process.

6. the information transferring method of network interface as described in one of claim 1 to 5, is characterized by: in the time carrying out packet packing, packet is carried out to interim conversation secret key encryption.