CN105187568B - A kind of IPV4 address conversion methods and device - Google Patents
A kind of IPV4 address conversion methods and device Download PDFInfo
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- CN105187568B CN105187568B CN201510494185.0A CN201510494185A CN105187568B CN 105187568 B CN105187568 B CN 105187568B CN 201510494185 A CN201510494185 A CN 201510494185A CN 105187568 B CN105187568 B CN 105187568B
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- character string
- byte
- ipv4
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- addresses
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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
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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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
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
Abstract
The invention discloses a kind of IPV4 address conversion methods and device, this method to include：Initialize character string dimension corresponding with the number of the addresses IPV4；The corresponding number of a byte is extracted from the nybble of the addresses IPV4 successively, and obtains corresponding character string, filling to position corresponding with the byte in transformation result forms transformed address character string until completing the conversion of the addresses IPV4 nybble.Using the technical program, overcomes in present procedure design and the problem of existing inefficiency, calculate simply when realizing the exchange between IP address and character string by API, greatly improve the transfer efficiency of IP address.
Description
Technical field
The present invention relates to computer systems technology field more particularly to a kind of IPV4 address conversion methods and device.
Background technology
Botnet has the characteristics that attack method is simple, is affected, is difficult to trace so that distributed denial of service is attacked
(DDoS, Distributed Denial of Service) is hit to obtain quickly growing and increasingly spreading unchecked.Thousands of host compositions
Botnet provide required bandwidth and host for ddos attack, form huge attack and network flow, it is right
Great harm is caused by attacking network.With the continuous improvement and development of ddos attack technology, (Internet service carries ISP
For quotient, Internet Service Provider), ICP (internet content provider, Internet Content
Provider the safety and operation that), the operators such as IDC (Internet data center, Internet Data Center) face are chosen
War is also on the increase, and operator must be detected flow and be subject to before DDoS threatens influence key business and application
Cleaning, it is ensured that the operation of network normal table and the normal development of business.
It is one of the core technology of DDos detections that IP, which is counted with analysis, and the addresses IPV4 are one group of word being made of four numbers
Symbol string, and it can be converted into the integer of a nybble in transmission over networks, analyze for convenience, it is often necessary to it will be from network
On IP address conversion inside the message that intercepts at character string.
Current programming generally uses API (application programming interface, the Application that system provides
Programming Interface) realize the exchange between IP address and character string, the API that system provides is generally relatively more logical
With, but under efficiency is relatively low, in the environment of high-speed message and big flow, being undoubtedly using these system interfaces can be significantly
The overall performance for having dragged program low.
Invention content
In view of this, a kind of IPV4 address conversion methods of offer of the embodiment of the present invention and device, to solve in the prior art
The technical issues of.
In a first aspect, an embodiment of the present invention provides a kind of IPV4 address conversion methods, including：
Initialize character string dimension corresponding with the number of the addresses IPV4；
The corresponding number of a byte is extracted from the nybble of the addresses IPV4 successively, and obtains corresponding character string, is filled out
It is charged in transformation result position corresponding with the byte, until completing the conversion of the addresses IPV4 nybble, is formed transformedly
Location character string.
Second aspect, the embodiment of the present invention additionally provide a kind of IPV4 address converting devices, including：
Initialization module, for initializing character string dimension corresponding with the number of the addresses IPV4；
Conversion module, for extracting the corresponding number of a byte, and acquisition pair from the nybble of the addresses IPV4 successively
The character string answered, filling to position corresponding with the byte in transformation result, until completing the conversion of the addresses IPV4 nybble, shape
At transformed address character string.
A kind of IPV4 address conversion methods provided in an embodiment of the present invention, by initializing a global character string dimension
It is corresponding with the number in IPV4 address bytes, and the mapping relations of number and character string are established, according to each byte institutes of IPV4
Corresponding content is copied directly to transformation result by corresponding number from character string dimension, eliminates memory copying；In addition, by
The number that IP address is formed in IPV4 is 0~255, it is possible to use the initialization of a small amount of character string plus the side of static assignment
Method, every time conversion only need to carry out 4 to 8 assignment operations, and the concise and assignment number of operation is few, it is simple to calculate, and greatly carries
Speed of the IP address conversion at character string is risen.
Description of the drawings
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent upon：
Fig. 1 is a kind of IPV4 address conversion methods flow chart that the embodiment of the present invention one provides；
Fig. 2 is a kind of detailed process flow chart of IPV4 address conversion methods described in Fig. 1；
Fig. 3 is a kind of IPV4 address conversion methods flow chart provided by Embodiment 2 of the present invention；
Fig. 4 is a kind of IPV4 address converting devices structure diagram that the embodiment of the present invention three provides；
Fig. 5 is a kind of concrete structure block diagram of IPV4 address converting devices described in Fig. 4.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to just
In description, only some but not all contents related to the present invention are shown in the drawings.
Embodiment one
Fig. 1 is a kind of IPV4 address conversion methods flow chart in the embodiment of the present invention one, present embodiments provides one kind
IPV4 address conversion methods, this method can be executed by arbitrarily executing the device of IPV4 address conversions, which can pass through
Software/or hardware realization.As shown in Figure 1, this method includes：
S110, initialization character string dimension corresponding with the number of the addresses IPV4；
Provide that IP address length is 32, that is, has 2^32-1=255 address in IPV4, so initializing an overall situation here
Length be 255 character string dimension str, with the addresses IPV4 number it is corresponding.By 0 to 255 number, it is respectively set corresponding
Character string, and the character string of setting is formed into character string dimension, and the mapping relations of number and character string are established, mapping is closed
System is as follows：
Str [0]=" 0 ", str [1]=" 1 " ... ... str [10]=" 10 ", str [100]=" 100 " ... ... str
[255]=" 255 ".
So analogize, array global in this way need to only initialize once, so that it may initial to carry out all addresses in IPV4
Change setting, so that it may to use always in a program.
S120, the corresponding number of a byte is extracted from the nybble of the addresses IPV4 successively, and obtains corresponding character
String, filling to position corresponding with the byte in transformation result, until the conversion of the addresses IPV4 nybble is completed, after forming conversion
Address character string.
Referring to Fig. 2, it is preferred that be based on said program, which includes：
S121, for the addresses IPV4 to be converted, setting pointer is directed toward the first character section of the addresses IPV4, as working as
Preceding byte；
Preferably, since the addresses IPV4 include 4 bytes in total, will institute be directed toward as the pointer by first character section from left to right
The first character section of the addresses IPV4 is stated, and so on, using the 4th byte from left to right as the end of the addresses IPV4.
S122, the number of the pointer extracting current byte is used；
S123, according to number and the mapping relations of character string, from initialization string array inquiry obtain the number
Corresponding character string；
S124, the character string inquired is filled into transformation result position corresponding with the byte；
Preferably, since the addresses IPV4 include in total 4 bytes, the byte is arranged in transformation result to be corresponded
4 positions, such as：First character section corresponding position one, second byte corresponding position two, third byte corresponding position
Three, the 4th byte corresponding position four.
S125, mobile pointer, judge whether the end for reaching the addresses IPV4, if so, in the transformation result
End mark is arranged in end, forms address character string, if it is not, then returning and being carried described in executing using next byte as current byte
Take the operation of the number of current byte.
Preferably, as current byte be nybble, then the end of the transformation result ret be arranged end mark 0, formed
Address character string simultaneously returns in the transformation result ret, and otherwise the current locations the transformation result ret are set to ' ', and return
Execute the operation of the number of the extraction current byte.
The IPV4 address conversion methods that the embodiment of the present invention one provides, by initialize global character string dimension with
Number in IPV4 address bytes is corresponding, and establishes the mapping relations of number and character string, and array global so only needs initially
Change primary, so that it may all addresses in IPV4 are carried out Initialize installation, so that it may to use always in a program；In addition, turning
When changing IP address, using pointer algorithm, pointer P is made to be directed toward the IP, using pointer P can successively from quadlets at IPV4 it is whole
Each byte is extracted in several, can thus pointer be used to transmit address rather than real data, can improve transmission speed
Degree, a large amount of memories can be saved by having.
Embodiment two
Fig. 3 is a kind of IPV4 address conversion methods flow chart in the embodiment of the present invention two, the technical solution of the present embodiment
Based on above-described embodiment one, make further optimization on the basis of embodiment one.
Further, obtain corresponding character string described, filling to position corresponding with the byte in transformation result it
Before, according to the length of the number, determine the assignment type of corresponding character string.The flow specifically includes：
If S310, the number are more than or equal to 100, corresponding character string is split as a character type and one short
Integer carries out assignment；
If S320, the number are less than 100 and more than or equal to 10, corresponding character string are assigned a value of short；
If S330, the number are less than 10, corresponding character string is assigned a value of character type.
Illustratively, a character type length is 1 byte, and a short length is 2 bytes.
Such as：If current pointer is directed toward byte, corresponding number is 192,192>100, it is reflected with character string according to number
Relationship is penetrated, 192 corresponding character strings " 192 " of number are split into a character type " 1 " and a short " 92 " carries out assignment,
Then the transformation result ret length adds 3；
If current pointer is directed toward byte, corresponding number is 71,100>71>10, it is closed according to the mapping of number and character string
71 corresponding character strings " 71 " of number are assigned a value of short by system, and then the transformation result ret length adds 2；
If current pointer is directed toward byte, corresponding number is 1,1<10, then 1 corresponding character string " 1 " of number is assigned a value of
Character type, then the transformation result ret length add 1.
IPV4 address conversion methods provided by Embodiment 2 of the present invention determine corresponding character according to the length of the number
The assignment type of string, each number, which at most carries out assignment operation twice, can obtain transformation result, assignment method it is concise and
Assignment number is few, it is simple to calculate, and conversion every time only needs to carry out 4 to 8 assignment operations, greatly improve IPV4 address conversions at
The speed of character string.
Embodiment three
Fig. 4 is a kind of IPV4 address converting devices structure diagram that the embodiment of the present invention three provides.The technology of the present embodiment
Scheme is based on above-described embodiment, as shown in figure 4, the IPV4 address converting devices include：
Initialization module 410, for initializing character string dimension corresponding with the number of the addresses IPV4；
Conversion module 420 for extracting the corresponding number of a byte from the nybble of the addresses IPV4 successively, and obtains
Corresponding character string, filling to position corresponding with the byte in transformation result, until the conversion of the addresses IPV4 nybble is completed,
Form transformed address character string.
On the basis of the above embodiments, initialization module specifically can be used for：By 0 to 255 number, it is respectively set pair
The character string answered, and the character string of setting is formed into character string dimension, and establish the mapping relations of number and character string.
On the basis of the above embodiments, conversion module includes：
Pointer unit 421, for for the addresses IPV4 to be converted, setting pointer to be directed toward first of the addresses IPV4
Byte, as current byte；
Extraction unit 422, for the number using the pointer extracting current byte；
Query unit 423, for the corresponding character string of the inquiry acquisition number from initialization string array；
Fills unit 424, for the character string inquired to be filled into transformation result position corresponding with the byte；
Judging unit 425 judges whether the end for reaching the addresses IPV4, if so, described for moving pointer
End mark is arranged in the end of transformation result, forms address character string, if it is not, then being returned using next byte as current byte
Execute the operation of the number of the extraction current byte.
Further, which further includes assignment module, for obtaining corresponding character string, in filling to transformation result
Before position corresponding with the byte, according to the length of the number, the assignment type of corresponding character string is determined.
On the basis of the above embodiments, assignment module is specifically used for：
If the number is more than or equal to 100, corresponding character string is split as a character type and a short
Carry out assignment；
If the number is less than 100 and more than or equal to 10, corresponding character string is assigned a value of short shaping；
If the number is less than 10, corresponding character string is assigned a value of character type.
The IPV4 address converting devices that the embodiment of the present invention is provided are for executing IPV4 provided in an embodiment of the present invention
Location conversion method has corresponding function and advantageous effect.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (6)
1. a kind of IPV4 address conversion methods, which is characterized in that including：
Initialize character string dimension corresponding with the number of the addresses IPV4；
The corresponding number of a byte is extracted from the nybble of the addresses IPV4 successively, and obtains corresponding character string, filling is extremely
Position corresponding with the byte in transformation result forms transformed address word until completing the conversion of the addresses IPV4 nybble
Symbol string；
Obtain corresponding character string further includes before filling to position corresponding with the byte in transformation result：
According to the length of the number, the assignment type of corresponding character string is determined；
According to the length of the number, determine that the assignment type of corresponding character string includes：
If the number is more than or equal to 100, corresponding character string is split as a character type and a short carries out
Assignment；
If the number is less than 100 and more than or equal to 10, corresponding character string is assigned a value of short；
If the number is less than 10, corresponding character string is assigned a value of character type.
2. according to the method described in claim 1, it is characterized in that, a byte is extracted from the nybble of the addresses IPV4 successively
Corresponding number, and corresponding character string is obtained, filling to position corresponding with the byte in transformation result, until completing IPV4
The conversion of address nybble, forming transformed address character string includes：
For the addresses IPV4 to be converted, setting pointer is directed toward the first character section of the addresses IPV4, as current byte；
Use the number of the pointer extracting current byte；
Inquiry obtains the corresponding character string of the number from initialization string array；
The character string inquired is filled into transformation result position corresponding with the byte；
Mobile pointer, judges whether the end for reaching the addresses IPV4, if so, knot is arranged at the end of the transformation result
Beam accords with, and forms address character string, if it is not, then returning using next byte as current byte and executing the extraction current byte
Number operation.
3. according to the method described in claim 1, it is characterized in that, initialization character string number corresponding with the number of the addresses IPV4
Group includes：
By 0 to 255 number, corresponding character string is respectively set, and the character string of setting is formed into character string dimension, and
Establish the mapping relations of number and character string.
4. a kind of IPV4 address converting devices, which is characterized in that including：
Initialization module, for initializing character string dimension corresponding with the number of the addresses IPV4；
Conversion module for extracting the corresponding number of a byte from the nybble of the addresses IPV4 successively, and obtains corresponding
Character string, filling to position corresponding with the byte in transformation result form and turn until completing the conversion of the addresses IPV4 nybble
Address character string after changing；
Assignment module, for obtaining corresponding character string, before filling to position corresponding with the byte in transformation result, root
According to the length of the number, the assignment type of corresponding character string is determined；
The assignment module is specifically used for：
If the number is more than or equal to 100, corresponding character string is split as a character type and a short carries out
Assignment；
If the number is less than 100 and more than or equal to 10, corresponding character string is assigned a value of short；
If the number is less than 10, corresponding character string is assigned a value of character type.
5. device according to claim 4, which is characterized in that the conversion module includes：
Pointer unit, for for the addresses IPV4 to be converted, setting pointer to be directed toward the first character section of the addresses IPV4, makees
For current byte；
Extraction unit, for the number using the pointer extracting current byte；
Query unit, for the corresponding character string of the inquiry acquisition number from initialization string array；
Fills unit, for the character string inquired to be filled into transformation result position corresponding with the byte；
Judging unit judges whether the end for reaching the addresses IPV4, if so, in the Change-over knot for moving pointer
End mark is arranged in the end of fruit, forms address character string, if it is not, then returning using next byte as current byte and executing institute
State the operation of the number of extraction current byte.
6. device according to claim 4, which is characterized in that the initialization module is specifically used for：
By 0 to 255 number, corresponding character string is respectively set, and the character string of setting is formed into character string dimension, and
Establish the mapping relations of number and character string.
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| JP2012156957A (en) * | 2011-01-28 | 2012-08-16 | Hitachi Ltd | Network system, control device, computer and network device |
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| CN1269657A (en) * | 2000-04-28 | 2000-10-11 | 西南交通大学 | Digital data converting method |
| CN101557349A (en) * | 2009-05-26 | 2009-10-14 | 孙斌 | Method and system for processing Internet data message |
| CN102332030A (en) * | 2011-10-17 | 2012-01-25 | 中国科学院计算技术研究所 | Data storing, managing and inquiring method and system for distributed key-value storage system |
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