KR20020067106A - SYSTEM AND METHOD FOR THE AUTOMATIC CONVERSION OF IPv4 TO IPv6 SOCKET API - Google Patents

Abstract

A system and method are provided for automatically performing source code conversion of IPv6 applications such that IPv4 applications used on an Internet Protocol version-4 (IPv4) host 10 can run on an IPv6 host 40. The system and method of the present invention extracts the IPv4 application provided from the IPv4 host 10 on a line basis, parses each extracted line information on a character basis to generate a series of tokens corresponding to each line information, and maps a predetermined mapping. Based on the table 55, each generated token is converted into a code form suitable for an IPv6 application. The mapping table 55 includes an IPv4 code group used in an IPv4 application and an IPv6 code group having a plurality of codes corresponding to respective codes of the IPv4 code group. The mapping table 55 may be previously created or updated by a user.

Description

IP6 code automatic conversion system and method {SYSTEM AND METHOD FOR THE AUTOMATIC CONVERSION OF IPv4 TO IPv6 SOCKET API}

The present invention relates to a network communication protocol, and more particularly, to a system and a method capable of smoothly supporting next generation Internet Protocol (IPv6) based communication between hosts on a network.

Currently, the TCP / IP communication protocol (IPv4) having an IP version 4.0 is mainly used as a protocol for transmitting data on a network. TCP / IP programs are installed when a user runs his or her computer to access the Internet, as is well known, through which messages can be sent to or received from other computer users using the same TCP / IP communication protocol. It becomes possible. Socket API (Socket Application Program Interface), a method of communication between a client program and a server program on a network, is dependent on such a TCP / IP protocol and is configured for IP address. As is well known, an IP address is a 32-bit address given in the concept of matching a physical network address in order to efficiently perform routing on a network such as the Internet. This IP address identifies a unique host on the network. It can also identify the network on which the host resides.

However, the current 32-bit IP address system makes it difficult to assign addresses to an increasing number of hosts around the world. Therefore, a study on the TCP / IP protocol (IPv6) with IP version 6.0 employing a 128-bit address system Is actively underway. In other words, IPv6 addressing system is a new addressing method for next generation internet, and it can provide almost unlimited address space by using 128-bit addressing system. To do this, IPv4 socket APIs (applications for IPv4) used on current IPv4 networks need to be converted to IPv6 socket APIs in order to run on IPv6 networks.

As an example for such IPv6 socket API conversion, there are products named "Socket Scrubber" and "Checkv4" developed by Sun Corporation and Microsoft. These products analyze the source code of IPv4 versions of directories and files provided from an IPv4 network to indicate the lines and their contents that need to be converted to IPv6 source code. By converting the code into IPv6 source code, communication on an IPv6 network is possible. However, as described above, the conventional IPv6 code conversion product displays only the lines and the corresponding contents to be converted into the IPv6 source code, so that the user can It is a hassle to open the file and convert the part to compile.

Therefore, the main object of the present invention is to automatically convert the IPv4 socket API code used in the IPv4 network to the IPv6 socket API code using a pre-registered code mapping table, so that applications used in the IPv4 network can be executed in the IPv6 network. The present invention provides a system and method for automatically converting IPv6 codes.

1 is a network configuration for explaining the automatic IPv6 code conversion system according to the present invention.

Figure 2 is a detailed block diagram of the IPv6 code automatic conversion system of the present invention shown in FIG.

3 is a diagram illustrating a process for generating a token from each line of an IPv4 source file according to the present invention.

4 illustrates a mapping table used in the present invention.

5 and 6 are flow charts for explaining the operation of the IPv6 code automatic conversion system according to the present invention, respectively.

<Explanation of symbols for the main parts of the drawings>

10: IPv4 host

20: IPv4 Network

30: IPv6 network

40: IPv6 host

50: IPv6 code automatic conversion system

51: data judgment unit

52: line extraction unit

53: token generator

54: token comparison unit

55: mapping table

56: code conversion unit

57: line generator

58: data output unit

59: mapping table update unit

In order to achieve the above object, the automatic code conversion method according to the present invention is a method for automatically converting the code of the application so that the application used in the first network can be executed in the second network, the application used in the first network Extracting data line by line, generating a series of tokens corresponding to each line information of the extracted application data, and code forms suitable to be executed in the second network for each generated token based on a predetermined mapping table Converting to an application having a.

In addition, the mapping table of the present invention has a first code group used in an application of the first network and a second code group having a plurality of codes used in the converted application and corresponding to each code of the first code group. It can be created or updated in advance by the user.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is a conceptual diagram of a network used to describe the IPv6 automatic code conversion system of the present invention. In Fig. 1, a plurality of hosts 10 on the left side are connected to an IPv4 network 20 using a 32-bit address system to use IPv4 applications. In addition, the plurality of hosts 40 on the right side are connected to the IPv6 network 30 using the 128-bit address system and use an application that functions as an IPv4 application. The system of the present invention is embedded in each host 10 using an IPv4 application, and by automatically converting an IPv4 code used in the IPv4 network 20 to an IPv6 code using a predetermined code conversion table, the IPv4 network 20 IPv4 application in ()) to run in the IPv6 network (30).

Hereinafter, operations and functions of the IPv6 automatic code conversion system 50 of the present invention will be described in detail with reference to FIGS. 1 and 2.

2 is a schematic block diagram of an IPv6 automatic code conversion system 50 according to the present invention, a data determining unit 51, a line extracting unit 52, a token generating unit 53, a token comparing unit 54, It includes a mapping table 55, a code converter 56, a line generator 57, a data output unit 58, and a mapping table updater 59.

The data determination unit 51 determines whether the IPv4 input data provided as a conversion target from the IPv4 network 20 is a file or a directory. That is, if the input data is a file, the data determination unit 51 transmits the input file to the line extracting unit 52, and if the directory is a directory, determines whether the file exists in the input directory. The file is transmitted to the line extraction unit 52.

The line extracting unit 52 extracts the contents of the file input from the data determining unit 51 for each line and sequentially transmits the contents of the file to the token generating unit 53.

The token generating unit 53 reads each line information provided by the line extracting unit 52 by one character, and parses each line as whether the corresponding character is a character used in a variable or function structure, an operator, or other character. Create a token corresponding to. As will be appreciated, tokens can be a keyword, operator or punctuation as a basic language element that can no longer be grammatically divided. In general, variables, constants, data types, and the like used in programming languages such as C and C ++ can use only characters a to z, A to Z, 0 to 9, _, and these characters are set as ASCII codes. have. That is, the token generating unit 53 determines whether each character parsed is present in the ASCII codes of a to z, A to Z, 0 to 9, _ using an internal memory (not shown) that stores such ASCII codes. If present, it is determined as a token, otherwise it is classified by other characters to generate a new token.

For example, when one line information extracted by the line extracting unit 52 is s = socket (AF_INET, SOCK_STREAM, 0), the token generating unit 53 is extracted in the manner as shown in FIG. Generate token information for the line. That is, as shown in FIG. 3, the token generating unit 53 first determines whether an ASCII code for "s" exists in the internal memory among s = socket (AF_INET, SOCK_STREAM, 0). Next, the token generating unit 53 judges whether the ASCII code of "=" following "s" exists in the internal memory, and if there is no ASCII code of "=", generates "s" as the first token. Reset for the next token generation. In this way, the token generating unit 53 determines whether the ASCII codes for the series of s, o, c, k, e, and t following "=" exist in the internal memory, and then "" following the "t". It is determined whether the ASCII code of "" exists in the internal memory. If there is no ASCII code of "(", the token generating unit 53 generates "socket" as the second token and generates the next token as described above. Similarly, the token generating unit 53 is a series of "A", "F", "_", "I", "N", "E", "T" and "," following "(". ASCII code determination process of "" is performed to generate "AF_INET" as the third token. In this manner, the token generator 53 generates "SOCK_STREAM" as the fourth token and "0" as the fifth token. do.

That is, in the extracted line information s = socket (AF_INET, SOCK_STREAM, 0), "=", "(", ",", ",", ")" is the ASCII stored in the internal memory of the token generating unit 53. As a character code not in the code, it is used as a reset code to generate a new token. As a result, as shown in Fig. 3, the token in the extracted line information s = socket (AF_INET, SOCK_STREAM, 0) is 5 of "s", "socket", "AF_INET", "SOCK_STREAM", and "0". You can see the game. Five token information corresponding to the line is transmitted to the token comparison unit 54.

The mapping table 55 of the present invention stores each IPv4 socket API and corresponding IPv6 socket API information as shown in FIG. 4, and may be registered in advance by an operator providing a code conversion function of the present invention. have. In the mapping table of FIG. 4, the left list 60 represents pre-registered IPv4 key data corresponding to the IPv4 socket API, and the right list 70 represents pre-registered IPv6 key data corresponding to the IPv6 socket API. According to the present invention, the user may update the mapping information stored in the mapping table 55 by using the mapping table updater 59 of FIG. 2. That is, mapping information stored in the mapping table 55 may be added, deleted or edited by the user.

The token comparing unit 54 connected to the mapping table 55 compares each token information input from the token generating unit 53 with IPv4 key data in the left list 60 of the mapping table 55. As a result of the comparison, if there is token information belonging to the IPv4 key data, the token comparison unit 54 transmits the corresponding token information (that is, AF_INET) and IPv4 key data corresponding thereto to the code conversion unit 56. On the other hand, if there is token information that does not belong to the IPv4 key data, only the token information (that is, s, socket, SOCK_STREAM, 0) is transmitted to the code conversion unit 56.

The code conversion unit 56 connected to the token comparison unit 54 and the mapping table 55 performs IPv6 code conversion based on the comparison result information from the token comparison unit 54. That is, the code conversion unit 56 converts the token information "AF_INET" of the IPv4 socket API into "AF_INET6" of the IPv6 socket API with reference to the mapping data shown in FIG. 4, and outputs other token information without conversion. .

The line generation unit 57, based on the code conversion information output from the code conversion unit 56, IPv6 socket API data of one line corresponding to the one line information extracted by the line extraction unit 52 (that is, s = socket (AF_INET6, SOCK_STREAM, 0) is generated and sent to the data output unit 58. The data output unit 58 transmits one line of IPv6 socket API data input from the line generation unit 57 to all of the input files. Temporarily store the IPv6 socket API data for a line until the mode is entered.

Since the code conversion process for the IPv4 socket API data of the next line of the input file provided as the conversion target from the IPv4 network 20 is performed in the same manner as described above, a detailed description thereof will be omitted. In this way, the code conversion process for all the lines of the input file provided from the IPv4 network 20 is terminated, and each converted line information is stored in the data output unit 58.

The data output unit 58 of the IPv6 automatic code conversion system 50 of the present invention generates an IPv6 application to be executed on the IPv6 network 30 using the converted IPv6 socket API data consisting of a plurality of stored lines. In this way, all the hosts 40 connected to the IPv6 network 30 can execute the IPv4 based program or the like by using the converted application. The IPv6 socket API program converted to the IPv6 code according to the present invention can be distributed to a plurality of hosts using the IPv6 socket API through a recording medium such as a compact disk or a communication network.

In addition, according to the present invention, a description has been made of automatically converting an IPv4 application used in the IPv4 network 20 to an IPv6 application, but the IPv6 application used in the IPv4 network 30 may be IPv4 using the above-described code mapping table. Of course, by converting to an application, an application used on an IPv6 network can also run on an IPv4 network.

5 and 6 are flowcharts for explaining the operation of the IPv6 code automatic conversion system according to the present invention, respectively.

In step S1 of FIG. 5, IPv4 data to be converted from the IPv4 network 20 is input to the data determination unit 51. In step S2, the data determining unit 51 determines whether the input data is a directory or a file. If the input data is not a directory, the process of the present invention judges the input data as a source file and proceeds to step S6 of FIG. 6 through tab A (to be described later), and if the input data is a directory, in the directory at step S3. Determine if the file exists. If the file exists in step S4, it is determined whether the file is a source file. If the file is a source file, then proceed to step S6 of FIG. 6 via tab A (to be described later); otherwise, copy the file in step S5 and return to step S3 to find another file in the directory. The process is carried out as described above.

In step S6 of FIG. 6, the process of the present invention opens a source file and a target file to which the source file is to be converted. In step S7, the contents of the source file are extracted line by line and sequentially output. In step S8, the process of the present invention determines whether the extracted line is the last line of the source file, and if it is not the last line, reads information of each line extracted in step S9 by one character, and the character is a variable or function. Parses the character, operator, or other character used in the structure to generate a token corresponding to each line in the manner described above.

In step S10, it is determined whether each generated token exists in the pre-registered mapping table, and if present, the corresponding token is determined as an IPv4 code, otherwise, the flow goes to step S12. The token determined as an IPv4 code in step S11 is converted into an IPv6 code corresponding to it based on the pre-registered mapping table, and a token that does not correspond to the IPv4 code is output as it is. Is generated. Then, in step S13, the process of the present invention creates one line of the target file based on one line of information converted into an IPv6 code, and temporarily stores it until information on all the lines of the source file is input.

Next, the process of the present invention returns to step S7 to extract information on the next line of the source file, and repeats steps S8 to S13 as described above. In this way, when the code conversion process for all the lines of the source file provided from the IPv4 network 20 is finished and the target file of the IPv6 code is created, the source file and the target file are closed and the process of the present invention is terminated.

According to the present invention, in the process of converting an IPv4 code into an IPv6 code, content to be converted to an IPv6 code based on a pre-registered mapping table and / or content to be converted to an IPv6 code because it is not registered in advance in the shopping table. Can be displayed on the screen. Accordingly, the user can easily edit on the screen information not registered in the mapping table or newly register the mapping table. In addition, the present invention provides an option to allow IPv4 applications used on various operating systems (OS), such as Solaris from US Sun or Microsoft's Windows and Linux, to run on an IPv6 network. It can provide automatic code conversion.

As mentioned above, although preferred embodiment of this invention was described, those skilled in the art can change variously, without deviating from the claim of this invention.

Therefore, according to the present invention, by automatically converting the IPv4 socket API code used in the IPv4 network to the IPv6 socket API code using a pre-registered code mapping table, IPv4 applications used in the IPv4 network can be easily used in the IPv6 network. It can be supported to run.

Claims (13)

A system for automatically converting code of an application so that an application used on the first network can run on the second network, Means for extracting application data used in the first network; Means for generating a series of tokens corresponding to the extracted application data; Means for converting each of the generated tokens into an application having a code form suitable for execution in the second network, based on a predetermined mapping table. Automatic transcoding system comprising a. The method of claim 1, The application data extracting means extracts the application data in line units, The token generating means parses the extracted line information in units of characters and applies them to the respective line information. An automatic transcoding system that generates a corresponding set of tokens. The method of claim 1, The mapping table may include a first code group used in the application of the first network and a second code group having a plurality of codes corresponding to each code of the first code group as used in the converted application. Equipped with automatic code conversion system. The method of claim 3, wherein And the mapping table is created by the user in advance and updated by the user. The method of claim 4, wherein The code conversion means, Determine whether a code of each generated token exists in the first code group based on the mapping table, and if present, convert the token into a corresponding code of the second code group; Otherwise, means to output the token without conversion, Means for generating a series of converted line information corresponding to each line based on the converted code and the untransformed code corresponding to each line; Means for compiling the converted line information and outputting the compiled application as the converted application to be executed in the second network. Automatic transcoding system comprising a. The method of claim 5, Said converted application is a communication protocol utilizing at least 128 bits. The method of claim 6, And the compiled application is recorded on a recording medium including a compact disc. In the method of automatically converting the code of the application so that the application used in the first network can be executed in the second network, A first step of extracting application data used in the first network on a line basis; A second step of generating a series of tokens corresponding to each line information of the extracted application data; Based on a predetermined mapping table, a third step of converting each generated token into an application having a code form suitable for execution in the second network Automatic transcoding method comprising a. The method of claim 8, The token generation in the second step is performed by parsing the respective line information character by character. The method of claim 8, The mapping table may include a first code group used in the application of the first network and a second code group having a plurality of codes corresponding to each code of the first code group to be used in the converted application. Automatic code conversion method provided. The method of claim 10, And the mapping table is created by the user in advance and updated by the user. The method of claim 11, The third step, Determine whether a code of each generated token exists in the first code group based on the mapping table, and if present, convert the token into a corresponding code of the second code group; Otherwise, output the token without conversion, Generating a series of converted line information corresponding to each line based on the converted code and the unconverted code corresponding to each line; Compiling the converted line information and outputting the compiled application as the converted application to be executed in the second network. Automatic transcoding method comprising a. The method of claim 12, And wherein said converted application is a communication protocol using at least 128 bits.