CN106131235A - A kind of IP address configuration method - Google Patents
A kind of IP address configuration method Download PDFInfo
- Publication number
- CN106131235A CN106131235A CN201610485406.2A CN201610485406A CN106131235A CN 106131235 A CN106131235 A CN 106131235A CN 201610485406 A CN201610485406 A CN 201610485406A CN 106131235 A CN106131235 A CN 106131235A
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- address
- terminal
- packet
- dhcp
- hook function
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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
- H04L61/5046—Resolving address allocation conflicts; Testing of addresses
-
- 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
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of IP address configuration method, it is applied in router Embedded Linux System, it is characterized in that, described Embedded Linux System has a data structure, the IP address used in this data structure storage current local network, further comprise the steps of: when terminal is by router transceiving data bag, resolve the IP address of this terminal, compare with the IP address in described data structure, if the IP address that result of the comparison shows this terminal has been used, then redistribute IP address for terminal or provide IP available address to reconfigure for this terminal.The present invention is redistributed by the IP address conflict in router side detection terminal, the IP address for conflict or is pointed out, it is achieved more efficient IP address reset is put, and reduces the workload of artificial contrast's inquiry, improves IP address reset efficiency.
Description
Technical field
The present invention relates to computer network communication field, particularly relate to a kind of IP address configuration method.
Background technology
IP (Internet Protocol) means between network the agreement of interconnection, be for computer network be connected with each other into
Row communication and the agreement that designs, it makes all computer networks being connected in the Internet realize being in communication with each other, it is stipulated that calculate
The rule should observed when machine communicates on the internet.The computer system of any manufacturer production, as long as observing IP agreement
Just can interconnect with the Internet.Because there being IP agreement, the Internet develops the meter becoming maximum, open in the world rapidly
Calculation machine communication network.Therefore, IP agreement can also be called " Internet Protocol ".
(Internet Protocol Address) refers to Internet protocol address in IP address.IP address is that IP agreement carries
A kind of unified address format of confession, it is one the unique logical address of each host assignment on the Internet, IP agreement
Being exactly to use this address to transmit information between main frame, this is the basis that Internet can run.Due to have this uniquely
Address, it is ensured that user is when connecting the calculating hands-operation of the Internet, it is possible to efficiently and easily from thousands upon thousands
Computer is selected oneself required object.
Mode according to the distribution of IP address is different, can be divided into static allocation IP address and dynamic IP address allocation.Static point
Joining IP address is to show each computer all to distribute a fixing IP address, uses same address every time.Dynamically distribution
IP address refers to just carry out the mode of IP address distribution needing when, when surfing the Net each time, and can one IP of random assortment
Address.The most conventional mode is by DHCP (DHCP, Dynamic Host Configuration
Protocol) automatically distribute a dynamic IP addressing to client.DHCP is the procotol of a LAN, uses UDP association
View work, method be generally applied in large-scale LAN environment, and Main Function is management, the distribution IP address concentrated, and makes net
Main frame in network environment obtains the information such as IP address, Gateway address, dns server address dynamically, and can promote address
Utilization rate.DHCP protocol uses client/server model, and the dynamic distribution task of host address is driven by network host.
When Dynamic Host Configuration Protocol server receives the information from network host applied address, just can send relevant address to network host and join
The information such as put, to realize the dynamic configuration of Network Host address information.
When reality is applied, when static allocation IP address and dynamic IP address allocation in a local network while and when depositing, warp
Set static ip address and the situation of existing IP address conflict in LAN often can occur.IP address conflict can cause net
Network interrupts, and has a strong impact on the normal use of network.The way of the most conventional settling IP address conflict is to detect in end side,
After IP address conflict being detected, need user manually to check allocated IP address, then find unassigned IP address also
Being set to this IP address of terminal, this method needs manually search one by one and arrange, inefficiency.
Based on disadvantages mentioned above, in the urgent need to a kind of new IP address distribution method, IP address can be detected efficiently whether
Conflict, can realize IP address reset put when there is IP address conflict the most again efficiently.
Summary of the invention
The present invention is directed to the deficiency that in prior art, network system IP address conflict detection and method for reconfiguration exist, open
A kind of IP address configuration method, can detect whether IP address conflicts, the most again can be when there is IP address conflict, efficiently
The IP address reset that realizes put.
A kind of IP address configuration method disclosed by the invention, is applied in router Embedded Linux System, embedded
Linux system is provided with a data structure, the IP address used in this data structure storage current local network, also include as
Lower step:
When terminal is by router transceiving data bag, resolve the IP address of this terminal, and with the IP ground in data structure
Location compares, if the IP address that result of the comparison shows this terminal has been used, then for terminal redistribute IP address or
IP available address is provided to reconfigure for this terminal.
According to a preferred embodiment of the invention, the data structure of the IP address used in storage current local network
In comprise two fields: IP address and MAC Address, and IP address and MAC Address one_to_one corresponding.
According to a preferred embodiment of the invention, packet can include DHCP packet or TCP, UDP message bag.
According to a preferred embodiment of the invention, at the netfilter fire wall of router inner core of embedded linux system
Registering HOOK function in packet filtering module, this HOOK function registration, to NF_INET_PRE_ROUTING point, is responsible for capturing terminal and is received
The packet sent out.
When HOOK function grabs DHCP Offer packet, it is judged that Dynamic Host Configuration Protocol server is distributed to the IP address of terminal and is
No have been used；If had been used, then system abandons this Offer packet, and feeds back a Decline packet to DHCP
Server, Dynamic Host Configuration Protocol server is follow-up will redistribute IP address for terminal.
If it is determined that the IP address that Dynamic Host Configuration Protocol server distributes to terminal is not used by, then HOOK function directly lets pass this
This IP address, to terminal, is stored in data structure by Offer packet simultaneously.
According to a preferred embodiment of the invention, HOOK function has a dhcp address pool global variable, this HOOK function
During operation, first can obtain the dhcp address pool data of router LAN end, and dhcp address pool data are stored in this dhcp address
In the global variable of pond.
According to a preferred embodiment of the invention, when HOOK function grabs the TCP handshake data bag that terminal sends, sentence
Whether the IP address of this terminal disconnected has been used；If had been used, then system simulation http server sends TCP handshake data
Bag, to terminal, completes the TCP handshake procedure of terminal and http server；When this terminal sends HTTP packet access network,
Router is the most occupied to this IP address of terminal notifying, and according to dhcp address pool global variable content presentation currently available IP ground
Location.
If it is determined that the IP address of this terminal is not used by, then system let pass this terminal transmitting-receiving packet, should simultaneously
IP address is stored in data structure.
According to a preferred embodiment of the invention, when HOOK function grabs the UDP message bag that terminal sends, it is judged that should
Whether the IP address of terminal has been used；If had been used, then system is the most occupied to this IP address of terminal notifying, and according to
Dhcp address pool global variable content presentation currently available IP address.
If it is determined that the IP address of this terminal is not used by, then system is by the packet of this terminal transmitting-receiving of letting pass, and will simultaneously
This IP address is stored in data structure.
By above solution, the method have the advantages that
Use by using in data structure storage current local network in the Embedded Linux System of router
IP address, and as the reference data of contrast, the packet content by resolving terminal extracts IP address of terminal simultaneously, real
Show whether router side detection IP address of terminal conflicts, it is provided that higher operational efficiency, it is to avoid Dynamic Host Configuration Protocol server divides
Join the dynamic IP addressing identical with existing static ip address, or different terminals uses identical static ip address.Meanwhile, by being
The IP address that system prompting is available, it is achieved more efficient IP address reset is put, and reduces the workload of artificial contrast's inquiry, improves IP
Address reset efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described.It should be evident that the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the process chart of first embodiment of the invention；
Fig. 2 is the second embodiment of the invention process chart when terminal uses DHCP dynamic IP allocation mode；
Fig. 3 is second embodiment of the invention process stream of transmitting-receiving tcp data bag when terminal uses static IP set-up mode
Cheng Tu.
Fig. 4 is second embodiment of the invention process stream of transmitting-receiving UDP message bag when terminal uses static IP set-up mode
Cheng Tu.
Detailed description of the invention
Below in conjunction with the accompanying drawings the preferred embodiments of the present invention are described in detail, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clear and definite defining.Aobvious and
Easily insight, the accompanying drawing in describing below is only the section Example of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings, and obtain other embodiment party
Formula.
For making simplified form, only schematically show part related to the present invention in each figure, they do not represent
It is as the actual flow process of product or structure.It addition, so that simplified form readily appreciates, there is identical function in some figure
Part, only symbolically depicts part flow process therein or structural representation, or has only marked one of them.In this article,
" one " not only represents " only this ", it is also possible to represent the situation of " more than one ".
The present invention is directed to the deficiency that in prior art, network system IP address conflict detection and method for reconfiguration exist, open
A kind of IP address configuration method, can detect whether IP address conflicts, the most again can be when there is IP address conflict, efficiently
The IP address reset that realizes put.
The present invention is applicable to technical field of the computer network, can be widely applied to each network system.
Fig. 1 is the flow chart of first embodiment of the invention.As it is shown in figure 1, a kind of IP address configuration side that the present invention proposes
Method, is applied in router Embedded Linux System, and Embedded Linux System is provided with a data structure, this data structure storage
The IP address used in current local network, also comprises the steps:
When terminal is by router transceiving data bag, resolve the IP address of this terminal, and with the IP ground in data structure
Location compares, if the IP address that result of the comparison shows this terminal has been used, then for terminal redistribute IP address or
IP available address is provided to reconfigure for this terminal.
Further, if the IP address that result of the comparison shows this terminal is not used by, then this IP address is stored in number
According in structure.
Preferably, the data structure of the IP address used in storage current local network comprises two field: IP
Address and MAC Address, and IP address and MAC Address one_to_one corresponding, record the IP address used in all-network and should with this
The terminal MAC address that IP address is corresponding.
Further, terminal can be DHCP packet or TCP, UDP message bag by the packet that router is received and dispatched,
When terminal uses the mode of Dynamic Host Configuration Protocol server dynamic IP address allocation, between terminal meeting and Dynamic Host Configuration Protocol server, receive and dispatch DHCP alternately
Packet, to obtain the dynamic IP addressing of distribution；When terminal uses the mode of static configuration IP, terminal is when accessing the Internet
TCP establishment of connection can be carried out with http server, receive and dispatch tcp data bag, or directly send UDP message to http server
Bag.
According to Fig. 2-Fig. 4, second embodiment of the invention is proposed.Second embodiment of the invention is at router embedded Linux
The netfilter firewall package filtering module of system kernel have registered HOOK function, be responsible for capturing each appointment of terminal transmitting-receiving
The packet of type.This HOOK function registration is to being positioned at data packet by the NF_INET_PRE_ROUTING point before selecting, system
The data content grabbed according to HOOK function, parses IP address of terminal, and is tied with data by the IP address of terminal parsed
IP address in structure compares, if the IP address that result of the comparison shows this terminal has been used, then again divides for terminal
Join IP address or provide IP available address to reconfigure for this terminal.
Fig. 2 is the process chart when terminal uses DHCP dynamic IP allocation mode, as in figure 2 it is shown, when terminal uses
During the mode of Dynamic Host Configuration Protocol server dynamic IP address allocation, mutual transmitting-receiving DHCP packet between terminal and Dynamic Host Configuration Protocol server, to obtain
The dynamic IP addressing that must distribute.HOOK function is by completing the inspection to IP address conflict to the parsing of DHCPOffer packet
Survey and process.
Concrete, HOOK function has a dhcp address pool global variable, when, after router startup, first HOOK function can
Obtain the dhcp address pool data of router LAN end, and the address pool data got are stored in the change of this dhcp address pool overall situation
In amount.Meanwhile, creating a data structure, this data structure comprises two fields: MAC Address and IP address, wherein MAC Address
With IP address one_to_one corresponding.This data structure named IP address table white list, has made in this white list store current network
IP address.
Further, when terminal is to Dynamic Host Configuration Protocol server application dynamic IP addressing, Dynamic Host Configuration Protocol server can respond DHCPOffer
Packet, after HOOK function grabs DHCPOffer packet, Solutions of Systems separates out Dynamic Host Configuration Protocol server and distributes to the IP ground of terminal
Location, and this IP address is compared with the IP address in IP address table white list, if result of the comparison shows this terminal
IP address has been used, then system abandons this DHCP Offer packet, and one Decline packet of feedback takes to DHCP simultaneously
Business device；Terminal, in the case of not receiving DHCP Offer packet, is understood again to Dynamic Host Configuration Protocol server application dynamic IP addressing,
Dynamic Host Configuration Protocol server will be the IP address that terminal distribution is new again.
Further, distribute to the IP address of terminal be not used by if system go out Dynamic Host Configuration Protocol server by multilevel iudge,
Then this IP address is stored in IP address table white list by HOOK function, and this Offer packet of the most directly letting pass is to terminal, follow-up
Not at the related data of this terminal of intercept process.
Fig. 3 is the process chart of transmitting-receiving tcp data bag when terminal uses static IP set-up mode, as it is shown on figure 3, work as
When terminal uses the mode of static configuration IP, when terminal configuration static ip address, system does not do IP collision detection, only works as end
Hold when accessing the Internet, i.e. carry out TCP establishment of connection with http server, receive and dispatch tcp data bag or directly to HTTP
When server sends UDP message bag, router carries out IP collision detection and process.
Concrete, when HOOK function grabs the TCP handshake data bag that terminal sends, Solutions of Systems separates out the IP ground of terminal
Location, and this IP address is compared with the IP address in IP address table white list, if result of the comparison shows this terminal
IP address has been used, then system simulation http server sends TCP handshake data bag to terminal, completes terminal and HTTP service
The TCP handshake procedure of device；When this terminal continues to send HTTP packet access network, this HTTP packet can be lost by router
Abandon, simultaneously the most occupied to this IP address of terminal notifying by webpage, and work as according to dhcp address pool global variable content presentation
Front IP available address, selects when reconfiguring IP address for terminal.
Further, if the IP address that system goes out this terminal by multilevel iudge is not used by, then system is by this IP ground
Location is stored in IP address table white list, this packet of the most directly letting pass, follow-up not at the related data of this terminal of intercept process.
Further, Fig. 4 is the process chart of transmitting-receiving tcp data bag when terminal uses static IP set-up mode.As
Shown in Fig. 4, when HOOK function grabs the UDP message bag that terminal sends, Solutions of Systems separates out the IP address of terminal, and by this IP
Address compares with the IP address in IP address table white list, if the IP address that result of the comparison shows this terminal is made
With, this UDP message bag can be abandoned by router, simultaneously the most occupied to this IP address of terminal notifying by webpage, and according to
Dhcp address pool global variable content presentation currently available IP address, selects when reconfiguring IP address for terminal.
Further, if the IP address that system goes out this terminal by multilevel iudge is not used by, then system is by this IP ground
Location is stored in IP address table white list, this packet of the most directly letting pass, follow-up not at the related data of this terminal of intercept process.
Further, when terminal disconnects network time, system receives terminal leave group message can be by MAC ground corresponding for this terminal
Location and IP address secondary IP address vindication list are removed.
Above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, any without
Cross change or replacement that creative work is expected, all should contain within protection scope of the present invention.Therefore, the protection of the present invention
Scope should be as the criterion with the protection domain that claims are limited.
Claims (10)
1. an IP address configuration method, is applied in router Embedded Linux System, it is characterised in that described embedded
Linux system has a data structure, the IP address used in this data structure storage current local network, also includes step
Rapid:
When terminal is by router transceiving data bag, resolve the IP address of this terminal, with the IP address in described data structure
Compare, if the IP address that result of the comparison shows this terminal has been used, then redistribute IP address for terminal or carry
Reconfigure for this terminal for IP available address.
2. a kind of IP address configuration method as claimed in claim 1, it is characterised in that described data structure comprises two words
Section, IP address and MAC Address, and described IP address and described MAC Address one_to_one corresponding.
3. a kind of IP address configuration method as claimed in claim 1, it is characterised in that the packet of described terminal transmitting-receiving is
DHCP packet or TCP, UDP message bag.
4. a kind of IP address configuration method as claimed in claim 3, it is characterised in that at described router embedded Linux
The netfilter firewall package filtering module of system kernel is registered HOOK function, described HOOK function registration to NF_INET_
PRE_ROUTING point, captures the packet of described terminal transmitting-receiving.
5. a kind of IP address configuration method as claimed in claim 4, it is characterised in that when described HOOK function grabs DHCP
During Offer packet, judge that described Dynamic Host Configuration Protocol server is distributed to the IP address of described terminal and whether had been used；If made
With, then system abandons this Offer packet, and feeds back a Decline packet to described Dynamic Host Configuration Protocol server, described DHCP clothes
Being engaged in, device is follow-up will redistribute IP address for described terminal.
6. a kind of IP address configuration method as claimed in claim 4, it is characterised in that when described HOOK function grabs DHCP
During Offer packet, judge that described Dynamic Host Configuration Protocol server is distributed to the IP address of described terminal and whether had been used；If do not made
With, the most described HOOK function this Offer packet of directly letting pass to described terminal, this IP address is stored in described data knot simultaneously
In structure.
7. a kind of IP address configuration method as claimed in claim 4, it is characterised in that described HOOK function has a DHCP ground
Pond, location global variable, during this HOOK function operation, first can obtain the dhcp address pool data of described router LAN end, and will
Described dhcp address pool data are stored in this dhcp address pool global variable.
8. a kind of IP address configuration method as claimed in claim 7, it is characterised in that when described HOOK function grabs described
During the TCP handshake data bag that terminal sends, it is judged that whether the IP address of this terminal has been used；If had been used, then system
Simulate described http server and send TCP handshake data bag to described terminal, complete described terminal and described http server
TCP handshake procedure；When this terminal sends HTTP packet access network, described router is to this IP address of described terminal notifying
The most occupied, and according to described dhcp address pool global variable content presentation currently available IP address.
9. a kind of IP address configuration method as claimed in claim 4, it is characterised in that when described HOOK function grabs described
During the TCP handshake data bag that terminal sends, it is judged that whether the IP address of this terminal has been used；If it is not, then system
By the packet of this terminal transmitting-receiving of letting pass, this IP address is stored in described data structure simultaneously.
10. a kind of IP address configuration method as claimed in claim 7, it is characterised in that when described HOOK function grabs institute
When stating the UDP message bag that terminal sends, it is judged that whether the IP address of this terminal has been used；If had been used, then system to
This IP address of described terminal notifying is the most occupied, and according to described dhcp address pool global variable content presentation currently available IP ground
Location；If it is not, then system is by the packet of this terminal transmitting-receiving of letting pass, this IP address is stored in described data structure simultaneously
In.
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| CN201610485406.2A CN106131235A (en) | 2016-06-28 | 2016-06-28 | A kind of IP address configuration method |
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| CN201610485406.2A CN106131235A (en) | 2016-06-28 | 2016-06-28 | A kind of IP address configuration method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106878485A (en) * | 2017-02-28 | 2017-06-20 | 新华三技术有限公司 | A kind of message processing method and device |
| CN108848200A (en) * | 2018-06-13 | 2018-11-20 | 郑州云海信息技术有限公司 | Equipment adding method, device, equipment and medium in a kind of local area network |
| CN109451093A (en) * | 2018-12-13 | 2019-03-08 | 新华三技术有限公司 | A kind of loopback port address distribution method and device |
| CN109889622A (en) * | 2019-02-25 | 2019-06-14 | 武汉晟联智融微电子科技有限公司 | Centralized logic address allocation method |
| CN109962991A (en) * | 2017-12-26 | 2019-07-02 | 中国移动通信集团四川有限公司 | Internet of Things fault handling method, device, equipment and medium |
| CN111917902A (en) * | 2020-08-10 | 2020-11-10 | 卡车司机（北京）科技有限公司 | Method, apparatus and computer readable storage medium for detecting a failure of a pound room device |
| CN115174525A (en) * | 2022-06-30 | 2022-10-11 | 北京百佑科技有限公司 | Method and device for allocating equipment IP addresses |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106878485A (en) * | 2017-02-28 | 2017-06-20 | 新华三技术有限公司 | A kind of message processing method and device |
| CN106878485B (en) * | 2017-02-28 | 2020-07-07 | 新华三技术有限公司 | Message processing method and device |
| CN109962991A (en) * | 2017-12-26 | 2019-07-02 | 中国移动通信集团四川有限公司 | Internet of Things fault handling method, device, equipment and medium |
| CN109962991B (en) * | 2017-12-26 | 2022-06-14 | 中国移动通信集团四川有限公司 | Internet of things fault processing method, device, equipment and medium |
| CN108848200A (en) * | 2018-06-13 | 2018-11-20 | 郑州云海信息技术有限公司 | Equipment adding method, device, equipment and medium in a kind of local area network |
| CN109451093B (en) * | 2018-12-13 | 2022-01-28 | 新华三技术有限公司 | Loopback interface address allocation method and device |
| CN109451093A (en) * | 2018-12-13 | 2019-03-08 | 新华三技术有限公司 | A kind of loopback port address distribution method and device |
| CN109889622A (en) * | 2019-02-25 | 2019-06-14 | 武汉晟联智融微电子科技有限公司 | Centralized logic address allocation method |
| CN109889622B (en) * | 2019-02-25 | 2022-05-13 | 武汉晟联智融微电子科技有限公司 | Centralized logic address allocation method |
| CN111917902A (en) * | 2020-08-10 | 2020-11-10 | 卡车司机（北京）科技有限公司 | Method, apparatus and computer readable storage medium for detecting a failure of a pound room device |
| CN111917902B (en) * | 2020-08-10 | 2023-05-09 | 卡车司机（北京）科技有限公司 | Method, apparatus and computer readable storage medium for detecting failure of pound room equipment |
| CN115174525A (en) * | 2022-06-30 | 2022-10-11 | 北京百佑科技有限公司 | Method and device for allocating equipment IP addresses |
| CN115174525B (en) * | 2022-06-30 | 2024-03-15 | 北京百佑科技有限公司 | Equipment IP address allocation method and device |
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