CN113242333A - Local area network IP mapping generation method and generator - Google Patents
Local area network IP mapping generation method and generator Download PDFInfo
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- CN113242333A CN113242333A CN202110782109.5A CN202110782109A CN113242333A CN 113242333 A CN113242333 A CN 113242333A CN 202110782109 A CN202110782109 A CN 202110782109A CN 113242333 A CN113242333 A CN 113242333A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/604—Address structures or formats
Abstract
The invention discloses a local area network IP mapping generation method and a generator, wherein the method comprises the following two sections of obtaining the IP address of a server end and converting the IP address into an IP code according to a set rule; randomly selecting a sub-table from a mapping relation table at a server end, traversing the sub-table, searching a digital code corresponding to the IP code, or calculating the digital code corresponding to the IP code according to a mapping rule of the sub-table; the client side obtains the digital code, and a sub-table to which the digital code belongs is searched in a mapping relation table of the client side; traversing the sub-table, searching the IP code corresponding to the digital code, or reversely calculating the IP code corresponding to the digital code according to the mapping rule of the sub-table; and restoring the searched IP code into the last two segments of the IP address. The invention obtains different digital codes according to different mapping relations, the digital codes are used as independent IP identification modules for different applications, and the IP is mapped into approximately unordered word strings, thereby providing a certain IP shielding function.
Description
Technical Field
The invention relates to the technical field of local area network IP address generation, in particular to a local area network IP mapping generation method and a local area network IP mapping generator.
Background
With the continuous development of internet technology, the internet technology drives daily life to become more and more high-tech. The internet of things and the local area network are increasingly popularized. This involves communication problems between different devices in the same internet of things or local area network. Network communication between different application terminals requires the use of an IP address as a unique identifier. Local area network communication is a common communication form, and is commonly used for interconnection of home intelligent devices, such as intelligent home appliances (refrigerators, washing machines, televisions, etc.), network devices (routers, NAS), and the like.
The interconnection of the above devices is usually initiated by the client, and the server IP is used as a parameter of the client. The server IP acquisition mode is commonly used in the prior art and comprises two types of automatic detection and manual input, and the manual input mode is generally divided into three modes of two-dimensional code scanning, manual IP input and manual serial number input.
When a local area network server and a client are interconnected (such as mobile phone screen projection and intelligent device interconnection), the client needs to acquire the IP of the server through some mechanism, such as manual IP input, two-dimensional code scanning, serial number input, list selection and the like. The method does not shield the IP address, and the leakage of the IP address is easily caused.
Disclosure of Invention
The invention aims to provide a local area network IP mapping generation method and a local area network IP mapping generator, which can solve the problem that the manual input mode in the prior art easily causes IP address leakage.
The purpose of the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a local area network IP mapping generation method, including the following steps:
acquiring the second two segments of the IP address of the server end, and converting the IP address into an IP code according to a set rule;
randomly selecting a sub-table from a mapping relation table at a server end, traversing the sub-table, searching a digital code corresponding to the IP code, or calculating the digital code corresponding to the IP code according to a mapping rule of the sub-table;
the client side obtains the digital code, and a sub-table to which the digital code belongs is searched in a mapping relation table of the client side; traversing the sub-table, searching the IP code corresponding to the digital code, or reversely calculating the IP code corresponding to the digital code according to the mapping rule of the sub-table;
restoring the searched IP code into the last two sections of the IP address;
forming a complete IP address.
Further, after the digital code corresponding to the IP code is searched, a step of performing binary conversion on the digital code is also included.
Further, converting the two sections of the IP address into IP codes according to the set rule includes: and converting two digits of the two sections after the IP address into a decimal number, wherein the conversion formula is IP code = a multiplied by 256+ b, wherein a is the digit of the third section of the IP address, and b is the digit of the fourth section of the IP address.
Furthermore, a plurality of sub-tables are stored in the mapping relation table of the server side, each sub-table corresponds to one mapping rule, and the mapping rules of each sub-table are different.
Further, the step of searching the sub-table to which the digital code belongs in the mapping relationship table of the client includes: the mapping relation table of the client comprises a plurality of sub-tables, the numerical code of each sub-table has a numerical range, the numerical range to which the numerical code obtained by the client belongs is judged, and the sub-table corresponding to the numerical range is further obtained.
In a second aspect, the present invention provides a local area network IP mapping generator comprising an encryption unit and a decryption unit, wherein:
the encryption unit is used for obtaining the second two sections of the IP address of the server end, converting the second two sections of the IP address into IP codes, randomly selecting a sub-table from the mapping relation table of the encryption unit, and searching the digital codes corresponding to the IP codes in the sub-table;
and the decryption unit is used for acquiring the digital code output by the encryption unit, searching the mapping relation table of the decryption unit, acquiring the sub-table to which the digital code belongs, traversing the sub-table, searching the IP code corresponding to the digital code, and restoring the IP code into the second two sections of the IP address.
Further, the encryption unit includes: the device comprises a first obtaining module, a first converting module and a first mapping module, wherein:
the first acquisition unit is used for acquiring the last two segments of the IP address of the server;
the first conversion module is used for converting the last two sections of the IP address of the server end into IP codes;
and the first mapping module is used for mapping the IP code into a digital code.
Furthermore, the encryption unit further comprises a first system conversion module, which converts the decimal digital code mapped by the first mapping module into a thirty-six system digital code.
Further, the decryption unit includes: a second obtaining module, a second mapping module and a second converting module, wherein:
the second acquisition module is used for acquiring the digital code sent by the encryption unit;
the second mapping module is used for mapping the digital code acquired by the second acquisition module into an IP code;
and the second conversion module is used for converting the IP codes mapped by the second mapping module into the second two sections of IP addresses.
Further, a second binary conversion module is further included between the second obtaining module and the second mapping module, and the second binary conversion module converts the thirty-six digit codes obtained by the second obtaining module into decimal digit codes and sends the decimal digit codes to the second mapping module.
The local area network IP mapping generation method and the generator are improved by manually inputting serial numbers, the last two sections of the IP addresses can be mapped into digital codes, and the digital codes are automatically decrypted by the equipment to form the IP addresses on the other equipment which is mutually networked by manually inputting the digital codes, so that the mutual connection of the IP addresses through shielding is realized. The invention can simply and quickly generate different mapping relations, obtain different digital codes according to the different mapping relations, serve as independent IP identification modules for different applications, map the IP into approximately unordered word strings and provide a certain IP shielding function.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of the operation of the encryption unit of the present invention;
FIG. 2 is a flowchart of the operation of the decryption unit of the present invention;
FIG. 3 is an exemplary illustration of a mapping table of the present invention;
FIG. 4 is a flowchart of steps of a method for generating an IP map for a local area network according to the present invention;
fig. 5 is a schematic structural diagram of a local area network IP mapping generation apparatus according to the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The local area network IP mapping generation method comprises the following steps:
and step S1, acquiring the second two segments of the IP address of the server, and converting the IP address into an IP code according to a set rule.
The IPv4 address on the server side is divided into four segments, e.g., 192.168.xxx. In the LAN connection, the contents of the first two segments are the same, so only the last two segments of the IP are needed to be coded and decoded.
Further, converting the two sections of the IP address into IP codes according to the set rule includes: and converting two digits of the two sections after the IP address into a decimal number, wherein the conversion formula is IP code = a multiplied by 256+ b, wherein a is the digit of the third section of the IP address, and b is the digit of the fourth section of the IP address.
The values of the last two segments of the IP are from 0.0 to 255.255, the last two segments are converted into a decimal number ranging from 0 to 65535, and 65536 digits in total represent 65536 IP codes. The conversion formula is not limited to a × 256+ b, and other conversion methods are possible, and those skilled in the art should understand that the substitution of the conversion method also falls within the protection scope of the present invention. The corresponding relationship between the last two segments of IP and the IP code is shown in the following table:
TABLE 1 correspondence table between the last two segments of IP and IP codes
Step S2, randomly selecting a sub-table from the mapping relationship table at the server, traversing the sub-table, and searching for the digital code corresponding to the IP code, or calculating the digital code corresponding to the IP code according to the mapping rule of the sub-table.
Furthermore, a plurality of sub-tables are stored in the mapping relation table of the server side, each sub-table has a mapping rule, and the mapping rules of each sub-table are different. Or each sub-table has a corresponding relation table of the IP code and the digital code established in advance. 65536 IP codes are arranged in each sub-table, the IP codes of each sub-table are the same, and each IP code in the corresponding relation table in each sub-table uniquely corresponds to one digital code. Or each IP code can be calculated to obtain a digital code according to the mapping rule. If the digital code is calculated according to the mapping rule, a corresponding relation table of the IP code and the digital code does not need to be established in advance, and the storage space can be saved.
In the mapping relation table of the server, one IP code corresponds to one digital code in one sub-table, and if n sub-tables exist, the IP code corresponds to n digital codes. The number codes in each sub-table are different due to different mapping relations. And randomly selecting one sub-table every time, searching the digital codes corresponding to the IP codes in the sub-table, wherein the digital codes obtained by the client every time are different and meet the IP shielding requirement. This process is called a digital code encoding process.
In a mapping relation table sub-table of a server side, a numerical code of each sub-table has a numerical range, in the numerical range of the numerical code of each sub-table, the first numerical value is defined as a numerical code start code of the sub-table, the last numerical value is defined as a numerical code end code of the sub-table, the numerical code start code and the numerical code end code are both represented by numbers, and the numerical code start code is smaller than the numerical code end code. The interval between the start code and the end code is the "digital code space" of the sub-table, and the interval length must be equal to or greater than the number of IP codes (65536). In actual use, the number code space may be greater than or equal to the number of IP codes (65536), i.e., leaving unused number codes free.
Fig. 3 is an example of a mapping table. Wherein Table 1 means sub-Table 1. The mapping rule of the digital code and the IP code in the segment table 1 is as follows: digital code = IP code + start code 1. The mapping rule of the numeric code and the IP code in the segment table 2 is: numeric code = IP code + start code 2, etc. The mapping rules of each sub-table are different, for example, a reverse order mode is adopted, the minimum IP code corresponds to the maximum digital code, and an offset can be added when the order is positive and reverse. And disorder can also be used, the IP codes are disordered and then correspond to the digital codes, and the mode needs to occupy larger storage space. The mapping rules may be set according to actual needs, and should not be taken as limitations of the present invention. The mapping rules can be constructed by adopting positive sequence, negative sequence, random, Hash algorithm, symmetric and asymmetric encryption and other modes, and only one digital code corresponding to each IP code in each sub-table is required. Those skilled in the art can still fall within the scope of the present invention by merely replacing the mapping rules.
Preferably, after the digital code corresponding to the IP code is searched, a step of performing a binary conversion on the digital code is further included. Such as converting a decimal numeric code to a 36-ary number.
After the conversion into 36-system, the digital code can be represented by 36 characters including numbers 0-9 and letters a-z. 0-9 corresponds to 0-9 of 36-ary, and a-z corresponds to 10-35 of 36-ary. After the digital code is converted into 36-system number by using a general system conversion algorithm, the conversion mode has the advantages of shortening the display digit of the digital code and facilitating the input of a client.
Assuming that the address space of IPv4 ranges from 0.0.0.0 to 255.255.255.255, a total of 4,294,967,296 can be represented by 7-bit 36-ary numbers, i.e. by 7-bit numbers plus letters (without case differentiation). Therefore, when all IP sections need to be described, a mapping relation table can be established by adopting a similar method. And converts the numeric code into a numeric plus alphabetic representation.
Step S3, the client obtains the digital code, and the sub-table to which the digital code belongs is searched in the mapping relation table of the client. And traversing the sub-table, searching the IP code corresponding to the digital code, or reversely calculating the IP code corresponding to the digital code according to the mapping rule of the sub-table.
Further, the step of searching the sub-table to which the digital code belongs in the mapping relationship table of the client includes: the mapping relation table of the client also comprises a plurality of sub-tables, the numeric code of each sub-table has a numeric range, the numeric range of the numeric code obtained by the client is judged, and the sub-table corresponding to the numeric range is further obtained.
The mapping relation table of the client is the same as the mapping relation table of the server, in the mapping relation table sub-table of the client, in the numerical value range of the digital code, the first numerical value is defined as the digital code start code of the sub-table, the last numerical value is defined as the digital code end code of the sub-table, the digital code start code and the digital code end code are both represented by numbers, and the digital code start code is smaller than the digital code end code. The interval between the start code and the end code is the "digital code space" of the sub-table, and the interval length must be equal to or greater than the number of IP codes (65536).
Further, traversing the sub-table, and searching for the IP code corresponding to the digital code includes: each sub-table comprises a plurality of digital codes, and each digital code corresponds to a unique IP code according to the corresponding relation table of the digital codes and the IP codes. Or inversely calculating the IP code corresponding to the digital code according to the mapping rule stored in the sub-table. This process is called the decoding process of the digital code.
Preferably, if there is a step of performing a binary conversion on the digital code in step S2, the step S3 includes a step of performing a binary reduction on the digital code after obtaining the digital code. Specifically, 36-ary digits are converted into decimal digits.
And step S4, restoring the searched IP code into the second two sections of the IP address.
The client also has a corresponding relation table of the last two sections of the IP and the IP codes, which is the same as the corresponding relation table of the last two sections of the IP and the IP codes of the server, so that the IP codes can be restored into the last two sections of the IP addresses according to the corresponding relation table of the last two sections of the IP and the IP codes.
And step S5, forming a complete IP address.
Because the first two segments of the IP address are the same, after the second two segments are obtained, the second two segments of the IP address are combined with the first two segments to form the complete IP address.
Thus, the numeric code is at least 5 decimal digits, or 4 digits plus letters (case-insensitive, 36), or 3 digits plus letters (case-insensitive, 62), with easier conversion between the digits, and thus a decimal description is used.
The system is divided into an encoding end and a decoding end, wherein the encoding end maps the last two segments of the IP (IP codes) into digital codes (digital codes), and the decoding end reversely decodes the digital codes into the last two segments of the IP.
The basic encoding and decoding mode is to inquire a mapping relation table to obtain the corresponding relation between the IP codes and the digital codes, after system parameters are determined, one or more digital codes can be inquired by the same IP code, and each digital code corresponds to a unique IP code.
The encoding and decoding mode takes a segment table as a basic unit, and a plurality of segment tables are combined to form a mapping relation table.
The start code and the end code are represented by numbers, and the start code is smaller than the end code, the interval between the two is the 'digital code space' of the segment table, and the interval length must be greater than or equal to the number of IP codes (65536) to hold the digital codes of all IP codes on the segment table.
The present invention also provides a local area network IP mapping generator comprising an encryption unit and a decryption unit, wherein,
and the encryption unit is used for obtaining the second two sections of the IP address of the server, converting the second two sections of the IP address into IP codes, randomly selecting a sub-table from the mapping relation table of the encryption unit, and searching the digital codes corresponding to the IP codes in the sub-table.
And the decryption unit is used for acquiring the digital code output by the encryption unit, searching the mapping relation table of the decryption unit, acquiring the sub-table to which the digital code belongs, traversing the sub-table, searching the IP code corresponding to the digital code, and restoring the IP code into the second two sections of the IP address.
Further, the encryption unit includes: the device comprises a first obtaining module, a first converting module and a first mapping module, wherein:
the first acquisition unit is used for acquiring the last two segments of the IP address of the server;
the first conversion module is used for converting the last two sections of the IP address of the server end into IP codes;
and the first mapping module is used for mapping the IP code into a digital code.
Preferably, the encryption unit further comprises a first system conversion module for converting the decimal digital code mapped by the first mapping module into a thirty-six system digital code.
Further, the decryption unit includes: a second obtaining module, a second mapping module and a second converting module, wherein:
the second acquisition module is used for acquiring the digital code sent by the encryption unit;
the second mapping module is used for mapping the digital code acquired by the second acquisition module into an IP code;
and the second conversion module is used for converting the IP codes mapped by the second mapping module into the second two sections of IP addresses.
Preferably, a second binary conversion module is further included between the second obtaining module and the second mapping module, and converts the thirty-six digit code obtained by the second obtaining module into a decimal digit code and sends the decimal digit code to the second mapping module.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.
Claims (10)
1. A local area network IP mapping generation method is characterized by comprising the following steps:
acquiring the second two segments of the IP address of the server end, and converting the IP address into an IP code according to a set rule;
randomly selecting a sub-table from a mapping relation table at a server end, traversing the sub-table, searching a digital code corresponding to the IP code, or calculating the digital code corresponding to the IP code according to a mapping rule of the sub-table;
the client side obtains the digital code, and a sub-table to which the digital code belongs is searched in a mapping relation table of the client side; traversing the sub-table, searching the IP code corresponding to the digital code, or reversely calculating the IP code corresponding to the digital code according to the mapping rule of the sub-table;
restoring the searched IP code into the last two sections of the IP address;
forming a complete IP address.
2. The method as claimed in claim 1, further comprising a step of performing a binary conversion on the digital code after the digital code corresponding to the IP code is searched.
3. The method as claimed in claim 1 or 2, wherein converting the second two segments of the IP address into IP codes according to the set rule comprises: and converting two digits of the two sections after the IP address into a decimal number, wherein the conversion formula is IP code = a multiplied by 256+ b, wherein a is the digit of the third section of the IP address, and b is the digit of the fourth section of the IP address.
4. The method as claimed in claim 1 or 2, wherein the mapping relation table at the server side stores a plurality of sub-tables, each sub-table corresponds to a mapping rule, and the mapping rules of each sub-table are different.
5. The method as claimed in claim 1 or 2, wherein the step of looking up the sub-table to which the digital code belongs in the mapping relationship table of the client comprises: the mapping relation table of the client comprises a plurality of sub-tables, the numerical code of each sub-table has a numerical range, the numerical range to which the numerical code obtained by the client belongs is judged, and the sub-table corresponding to the numerical range is further obtained.
6. A local area network IP map generator comprising an encryption unit and a decryption unit, wherein:
the encryption unit is used for obtaining the second two sections of the IP address of the server end, converting the second two sections of the IP address into IP codes, randomly selecting a sub-table from the mapping relation table of the encryption unit, and searching the digital codes corresponding to the IP codes in the sub-table;
and the decryption unit is used for acquiring the digital code output by the encryption unit, searching the mapping relation table of the decryption unit, acquiring the sub-table to which the digital code belongs, traversing the sub-table, searching the IP code corresponding to the digital code, and restoring the IP code into the second two sections of the IP address.
7. The local area network IP mapping generator of claim 6, wherein the encryption unit comprises: the device comprises a first obtaining module, a first converting module and a first mapping module, wherein:
the first acquisition unit is used for acquiring the last two segments of the IP address of the server;
the first conversion module is used for converting the last two sections of the IP address of the server end into IP codes;
and the first mapping module is used for mapping the IP code into a digital code.
8. The local area network IP mapping generator of claim 7, wherein the encryption unit further comprises a first binary conversion module for converting the decimal number mapped by the first mapping module into a thirty-six digit number.
9. The local area network IP mapping generator of claim 6, wherein the decryption unit comprises: a second obtaining module, a second mapping module and a second converting module, wherein:
the second acquisition module is used for acquiring the digital code sent by the encryption unit;
the second mapping module is used for mapping the digital code acquired by the second acquisition module into an IP code;
and the second conversion module is used for converting the IP codes mapped by the second mapping module into the second two sections of IP addresses.
10. The IP mapping generator of claim 9, further comprising a second binary conversion module between the second obtaining module and the second mapping module, wherein the second binary conversion module converts the thirty-six digit codes obtained by the second obtaining module into decimal digit codes and sends the decimal digit codes to the second mapping module.
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