CN108076004A - For IPOE authentication methods, device and the server of client detection - Google Patents
For IPOE authentication methods, device and the server of client detection Download PDFInfo
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- CN108076004A CN108076004A CN201610984597.7A CN201610984597A CN108076004A CN 108076004 A CN108076004 A CN 108076004A CN 201610984597 A CN201610984597 A CN 201610984597A CN 108076004 A CN108076004 A CN 108076004A
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- message
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- probe requests
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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
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
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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
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/0227—Filtering policies
- H04L63/0236—Filtering by address, protocol, port number or service, e.g. IP-address or URL
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Computer Security & Cryptography (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Small-Scale Networks (AREA)
Abstract
The present invention provides a kind of IPOE authentication methods, device and server for client detection.The described method includes：When dynamic host configuration protocol DHCP client was currently in the IP address rental period, generate to detect the probe requests message whether dhcp client has discharged leased IP address；Wherein described the probe requests message includes：For representing first option option of the probe requests message for the message for detecting function, the increase option option for representing detecting function setting；The probe requests message is sent to the dhcp client.The method to dhcp client by sending the probe requests message, for detecting whether dhcp client has discharged leased IP address, actively to know dhcp client state, to increase the interactivity with dhcp client, ensures IP address utilization rate.
Description
Technical field
The present invention relates to network technique field more particularly to a kind of IPOE authentication methods detected for client, devices
And server.
Background technology
Dynamic host configuration protocol (DHCP, Dynamic Host Configuration Protocol) itself is not
For the function of certification, but DHCP can coordinate other technologies to realize certification, and all these extended modes, which are all referred to as DHCP+, to be recognized
Card.DHCP+OPTION extended fields are authenticated, and can be described as IPOE authentication modes.
Currently, based on DHCP protocol, the identifying procedure between dhcp client and Dynamic Host Configuration Protocol server includes：Dhcp client
Find the stage of Dynamic Host Configuration Protocol server, Dynamic Host Configuration Protocol server provides the stage of IP address, a dhcp client selection wherein DHCP service
Device provides the stage of IP address, DHCP confirms the stage of provided IP address.
Generally all there are one the time limit of the lease, expired rear DHCP services to the IP address that dhcp client is hired out for Dynamic Host Configuration Protocol server
Device will withdraw the IP address of taxi.If dhcp client needs to extend its IP lease, its IP lease must be updated.Work as DHCP
During client terminal start-up and when the IP lease time limits cross half, dhcp client can all be sent from trend Dynamic Host Configuration Protocol server updates its IP rents
Information about.
However, after a client gets IP address by Dynamic Host Configuration Protocol server, if directly shutdown is lower electric or pulls out
Cable, at this time Dynamic Host Configuration Protocol server can not know that the IP address has discharged, only wait lease time it is expired after could be by the IP
Address recycling is redistributed.Allocated IP address cannot be returned in time in the dhcp address pool that will so Dynamic Host Configuration Protocol server be caused
It receives, in some instances it may even be possible to assignable shortage of ip address in dhcp address pool can be caused.
The content of the invention
The purpose of technical solution of the present invention is to provide a kind of IPOE authentication methods, device and service for client detection
Device solves the prior art when dhcp client IP address discharges, and Dynamic Host Configuration Protocol server can not be known, cause IP address utilization rate low
Problem.
The present invention provides a kind of IPOE authentication methods for client detection, wherein, the described method includes：
When dynamic host configuration protocol DHCP client was currently in the IP address rental period, generate to detect described
Whether dhcp client has discharged the probe requests message of leased IP address；Wherein described the probe requests message includes：With
In represent the first option option that the probe requests message is the message for detecting function, for representing that detecting function is set
The increase option option put；
The probe requests message is sent to the dhcp client.
Preferably, the IPOE authentication methods described above for client detection, wherein, in the increase option option
Including three bytes, wherein representing to open detecting function when the first byte is the first numerical value, represent to be not turned on when being second value
Detecting function, the second byte is for recording at the beginning of the dhcp client leases IP address, and the 3rd byte is for recording
The sending cycle of the probe requests message.
Preferably, the IPOE authentication methods described above for client detection, wherein, the first option option is
Option 53 represents that the probe requests message is the message for detecting function by increased characterization value.
Preferably, the IPOE authentication methods described above for client detection, wherein, in the probe requests message also
Including the second option option, for recording the lease time that the dhcp client leases IP address.
Preferably, the IPOE authentication methods described above for client detection, wherein, it is described to the dhcp client
After the step of sending the probe requests message, the method further includes：
It monitors and the sound that dhcp client is sent according to the probe requests message whether is received within the first predetermined time
Answer message；
When receiving the response message, then confirm that the dhcp client does not discharge leased IP address, to described
Dhcp client replys confirmation message；
When not receiving the response message, then the probe requests message is sent to the dhcp client again,
If after sending the probe requests message described in preset times, the response message is not received, then by the dhcp client
Leased IP address puts back to address pool.
Preferably, the IPOE authentication methods described above for client detection, wherein, it is described to the dhcp client
It is once described to dhcp client transmission at interval of one second predetermined time in the step of sending the probe requests message
The probe requests message.
The present invention also provides a kind of IPOE authentication devices for client detection, wherein, described device includes：
Message generation module, for when dynamic host configuration protocol DHCP client was currently in the IP address rental period,
It generates to detect the probe requests message whether dhcp client has discharged leased IP address；Wherein described detection please
Message is asked to include：For represent the probe requests message be for detecting function message the first option option, use
In the increase option option for representing detecting function setting；
Message sending module, for sending the probe requests message to the dhcp client.
Preferably, the IPOE authentication devices described above for client detection, wherein, in the increase option option
Including three bytes, wherein representing to open detecting function when the first byte is the first numerical value, represent to be not turned on when being second value
Detecting function, the second byte is for recording at the beginning of the dhcp client leases IP address, and the 3rd byte is for recording
The sending cycle of the probe requests message.
Preferably, the IPOE authentication devices described above for client detection, wherein, the first option option is
Option 53 represents that the probe requests message is the message for detecting function by increased characterization value.
Preferably, the IPOE authentication devices described above for client detection, wherein, in the probe requests message also
Including the second option option, for recording the lease time that the dhcp client leases IP address.
Preferably, the IPOE authentication devices described above for client detection, wherein, described device further includes：
Message monitoring modular is received, dhcp client whether is received according within the first predetermined time for monitoring
The response message that the probe requests message is sent；
First processing module, for when receiving the response message, then confirming that the dhcp client does not discharge institute
IP address is leased, confirmation message is replied to the dhcp client；
Second processing module, for when not receiving the response message, then being sent again to the dhcp client
If the probe requests message after sending the probe requests message described in preset times, does not receive the response message, then
The dhcp client is leased into IP address and puts back to address pool.
Preferably, the IPOE authentication devices described above for client detection, wherein, the message sending module is used for
At interval of one second predetermined time the once the probe requests message is sent to the dhcp client.
The present invention also provides a kind of server, the IPOE certifications dress including being used for client detection described in as above any one
It puts.
At least one in specific embodiment of the invention above-mentioned technical proposal has the advantages that：
The IPOE authentication methods by dhcp client transmission the probe requests message, being for detecting dhcp client
It is no to have discharged leased IP address, actively to know dhcp client state, to increase the interactivity with dhcp client, protect
Demonstrate,prove IP address utilization rate.
Description of the drawings
Fig. 1 shows in IPOE authentication methods described in the embodiment of the present invention, increase the form schematic diagram of option option；
In IPOE authentication methods described in Fig. 2 expression embodiment of the present invention, the form schematic diagram of the probe requests message；
Fig. 3 represents the flow diagram of IPOE authentication methods described in the embodiment of the present invention；
Fig. 4 represents the structure diagram of IPOE authentication devices described in the embodiment of the present invention.
Specific embodiment
To make the embodiment of the present invention technical problems to be solved, technical solution and advantage clearer, below in conjunction with
Drawings and the specific embodiments are described in detail.
The embodiment of the present invention provides a kind of IPOE authentication methods for client detection, wherein, the described method includes：
When dynamic host configuration protocol DHCP client was currently in the IP address rental period, generate to detect described
Whether dhcp client has discharged the probe requests message of leased IP address；Wherein described the probe requests message includes：With
In represent the first option option that the probe requests message is the message for detecting function, for representing that detecting function is set
The increase option option put；
The probe requests message is sent to the dhcp client.
The IPOE authentication methods by dhcp client transmission the probe requests message, being for detecting dhcp client
It is no to have discharged leased IP address, actively to know dhcp client state, to increase the interactivity with dhcp client, protect
Demonstrate,prove IP address utilization rate.
Specifically, in the embodiment of the present invention, generate to detect whether dhcp client has discharged leased IP address
The probe requests message, using the message format of DHCP, specifically include：For representing that the probe requests message is for detecting
First option option of the message of function, the increase option option for representing detecting function setting.
Wherein, the first option option be option 53, by increased characterization value represent the probe requests message be for
The message of detecting function.It will be understood by those skilled in the art that option 53 is used to set dhcp message class in DHCP protocol
Type in IPOE authentication methods of the present invention, equally represents type of message, compared to the prior art using option 53
Option 53 is for detecting work(by one transmitted the probe requests message of new characterization value (value values) expression of increase
The message of energy.
In addition, in IPOE authentication methods of the present invention, represent that detecting function is set by increasing new option,
Also it is to represent that detecting function is set using increase option option.In the embodiment of the present invention, increasing option option includes
Three bytes wherein representing to open detecting function when the first byte is the first numerical value, represent to be not turned on detecting when being second value
Function, for the second byte for recording at the beginning of the dhcp client leases IP address, the 3rd byte is described for recording
The sending cycle of the probe requests message.
Specifically, the form of option option is increased as shown in Figure 1, wherein code is the generation for increasing option option
Code, len are to illustrate that increase option option is 3 byte lengths, and value is the increase option option recorded contents
It represents to be not turned on detecting function when first byte, wherein value values are 0, represents to open detecting function when value is 1；Second
Byte T1 is for recording at the beginning of dhcp client leases IP address, and the 3rd byte T2 is for recording the probe requests message
Sending cycle.
Further, in IPOE authentication methods described in the embodiment of the present invention, the second option is further included in the probe requests message
Option, for recording the lease time that the dhcp client leases IP address.Specifically, which can be
option 58。
The probe requests message can specifically be formed as the message lattice of DHCP as shown in Figure 2 based on above set content
Formula, hardware address type are ethernet mac address type, and hardware address length is MAC Address length, and MAC Address length is 6
Bit, wherein：For OP (1) for representing type of message as the probe requests message, Hops represents the hop count of intermediate repeater；Xid is
Dynamic Host Configuration Protocol server and the ID of dhcp client communication；It is used to characterize unicast when the first bits of Flags are 0；Ciaddr and
Yiaddr is used to represent the IP address of dhcp client；Siaddr is next-hop ip address；Giaddr is the IP of DHCP relay device
Address；Chaddr is client mac address；Sname is Dynamic Host Configuration Protocol server host name；Option can include the first above-mentioned choosing
Item (option 53), the second option (option 58) and increase option as shown in Figure 1.
Using the probe requests message of above-mentioned form, when Dynamic Host Configuration Protocol server is to dhcp client transmission above-mentioned message, it is used for
Detect whether the dhcp client has discharged leased IP address.
Further, Fig. 3 show the flow diagram of IPOE authentication methods described in the embodiment of the present invention, including following step
Suddenly：
S110, when dhcp client was currently in the IP address rental period, Dynamic Host Configuration Protocol server sends to dhcp client and visits
Survey request message；
S120 monitors whether receive the sound that dhcp client is sent according to the probe requests message within the first predetermined time
Answer message；When receiving response message, then step S130 is performed downwards；When not receiving response message, then perform downwards
Step S140；
S130 confirms that dhcp client does not discharge leased IP address, and replys confirmation message to dhcp client；
S140, again to dhcp client send the probe requests message, if send preset times the probe requests message it
Afterwards, do not receive response message, then dhcp client is leased into IP address and put back to address pool.
Further, in above-mentioned steps S110, Dynamic Host Configuration Protocol server to dhcp client send probe messages when, at interval of one the
Two predetermined times sent a probe requests message to dhcp client namely were currently at the IP address rental period in dhcp client
When interior, periodically to dhcp client the probe requests message, to realize the periodicity for using dhcp client IP address
Detection.
IPOE authentication methods of the present invention for client detection are initiated within the IP address rental period of dhcp client
Active probe message, when sending preset times the probe requests message, when not receiving the response message of dhcp client transmission, then
Confirm that client does not use IP address, and recycle the address in time, to improve address utilization rate.Therefore IPOE of the present invention
Authentication method by increasing detection behavior of the Dynamic Host Configuration Protocol server to dhcp client, actively knows dhcp client state, to increase
The interactivity of strong Dynamic Host Configuration Protocol server and dhcp client, ensures IP address utilization rate.
On the other hand the embodiment of the present invention also provides a kind of IPOE authentication devices for client detection, as shown in figure 4,
Described device includes：
Message generation module, for when dynamic host configuration protocol DHCP client was currently in the IP address rental period,
It generates to detect the probe requests message whether dhcp client has discharged leased IP address；Wherein described detection please
Message is asked to include：For represent the probe requests message be for detecting function message the first option option, use
In the increase option option for representing detecting function setting；
Message sending module, for sending the probe requests message to the dhcp client.
In the embodiment of the present invention, in the probe requests message that message generation module is generated, the increase option option
Include three bytes, wherein representing to open detecting function when the first byte is the first numerical value, represented not open when being second value
Open detecting function, at the beginning of the second byte leases IP address for recording the dhcp client, the 3rd byte is for remembering
Record the sending cycle of the probe requests message.
Specifically, the form of option option is increased as shown in Figure 1, wherein code is the generation for increasing option option
Code, len are to illustrate that increase option option is 3 byte lengths, and value is the increase option option recorded contents
It represents to be not turned on detecting function when first byte, wherein value values are 0, represents to open detecting function when value is 1；Second
Byte T1 is for recording at the beginning of dhcp client leases IP address, and the 3rd byte T2 is for recording the probe requests message
Sending cycle.
In addition, in the probe requests message, the first option option for the message of detecting function is option 53, is led to
It crosses increased characterization value and represents that the probe requests message is the message for detecting function.
In addition, the second option option is further included in the probe requests message, for recording the dhcp client institute
Lease the lease time of IP address.Specifically, which can be option 58.
In described device of the embodiment of the present invention, the probe requests message can specifically be formed based on above set content
For the message format of DHCP as shown in Figure 2, above description can be specifically referred to, details are not described herein.
In addition, IPOE authentication devices described in the embodiment of the present invention, as shown in figure 4, further including：
Message monitoring modular is received, dhcp client whether is received according within the first predetermined time for monitoring
The response message that the probe requests message is sent；
First processing module, for when receiving the response message, then confirming that the dhcp client does not discharge institute
IP address is leased, confirmation message is replied to the dhcp client；
Second processing module, for when not receiving the response message, then being sent again to the dhcp client
If the probe requests message after sending the probe requests message described in preset times, does not receive the response message, then
The dhcp client is leased into IP address and puts back to address pool.
In addition, in above-mentioned IPOE authentication devices, the message sending module is used at interval of one second predetermined time to institute
It states dhcp client and sends the once the probe requests message.
Another aspect of the present invention also provides a kind of server, including described in as above for the IPOE certifications of client detection
Device.Those skilled in the art should be able to understand the concrete structure of the server with said structure IPOE authentication devices,
This is not described in detail.
The present invention passes through the IP in dhcp client for IPOE authentication methods, device and the server of client detection
Active probe message is initiated in address lease, dhcp client state is actively known, to enhance Dynamic Host Configuration Protocol server and DHCP client
The interactivity at end ensures that dhcp client can be recovered in time when not using IP address, to ensure IP address utilization rate.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (13)
1. a kind of IPOE authentication methods for client detection, which is characterized in that the described method includes：
When dynamic host configuration protocol DHCP client was currently in the IP address rental period, generate to detect the DHCP visitors
Whether family end has discharged the probe requests message of leased IP address；Wherein described the probe requests message includes：For representing
The probe requests message is the first option option of the message for detecting function, the increasing for representing detecting function setting
Add option option；
The probe requests message is sent to the dhcp client.
2. according to claim 1 for the IPOE authentication methods of client detection, which is characterized in that the increase option
Option includes three bytes, wherein representing to open detecting function when the first byte is the first numerical value, table when being second value
Show and be not turned on detecting function, the second byte is for recording at the beginning of the dhcp client leases IP address, the 3rd byte
For recording the sending cycle of the probe requests message.
3. according to claim 1 for the IPOE authentication methods of client detection, which is characterized in that first option
Option is option 53, represents that the probe requests message is the message for detecting function by increased characterization value.
4. according to claim 1 for the IPOE authentication methods of client detection, which is characterized in that the probe requests thereby report
The second option option is further included in text, for recording the lease time that the dhcp client leases IP address.
5. according to claim 1 for the IPOE authentication methods of client detection, which is characterized in that described to the DHCP
After client sends the step of the probe requests message, the method further includes：
It monitors and the response report that dhcp client is sent according to the probe requests message whether is received within the first predetermined time
Text；
When receiving the response message, then confirm that the dhcp client does not discharge leased IP address, to the DHCP
Client replys confirmation message；
When not receiving the response message, then the probe requests message is sent to the dhcp client again, if hair
After sending the probe requests message described in preset times, the response message is not received, then rented the dhcp client
Address pool is put back to by means of IP address.
6. according to claim 1 for the IPOE authentication methods of client detection, which is characterized in that described to the DHCP
Client was sent in the step of the probe requests message, and one is sent to the dhcp client at interval of one second predetermined time
The secondary the probe requests message.
7. a kind of IPOE authentication devices for client detection, which is characterized in that described device includes：
Message generation module, for when dynamic host configuration protocol DHCP client was currently in the IP address rental period, generating
For detecting the probe requests message whether dhcp client has discharged leased IP address；Wherein described probe requests thereby report
Text includes：For represent the probe requests message be for detecting function message the first option option, for table
Show the increase option option that detecting function is set；
Message sending module, for sending the probe requests message to the dhcp client.
8. according to claim 7 for the IPOE authentication devices of client detection, which is characterized in that the increase option
Option includes three bytes, wherein representing to open detecting function when the first byte is the first numerical value, table when being second value
Show and be not turned on detecting function, the second byte is for recording at the beginning of the dhcp client leases IP address, the 3rd byte
For recording the sending cycle of the probe requests message.
9. according to claim 7 for the IPOE authentication devices of client detection, which is characterized in that first option
Option is option 53, represents that the probe requests message is the message for detecting function by increased characterization value.
10. according to claim 7 for the IPOE authentication devices of client detection, which is characterized in that the probe requests thereby
The second option option is further included in message, for recording the lease time that the dhcp client leases IP address.
11. according to claim 7 for the IPOE authentication devices of client detection, which is characterized in that described device is also wrapped
It includes：
Message monitoring modular is received, dhcp client whether is received according to the detection within the first predetermined time for monitoring
The response message that request message is sent；
First processing module is leased for when receiving the response message, then confirming that the dhcp client does not discharge
IP address replys confirmation message to the dhcp client；
Second processing module, for when not receiving the response message, then send again to the dhcp client described in
If the probe requests message after sending the probe requests message described in preset times, does not receive the response message, then by institute
It states dhcp client and leases IP address and put back to address pool.
12. according to claim 7 for the IPOE authentication devices of client detection, which is characterized in that the message is sent
Module is used to send the once the probe requests message to the dhcp client at interval of one second predetermined time.
A kind of 13. server, which is characterized in that the IPOE including being used for client detection described in any one of claim 7 to 12
Authentication device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610984597.7A CN108076004A (en) | 2016-11-09 | 2016-11-09 | For IPOE authentication methods, device and the server of client detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610984597.7A CN108076004A (en) | 2016-11-09 | 2016-11-09 | For IPOE authentication methods, device and the server of client detection |
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| CN201610984597.7A Pending CN108076004A (en) | 2016-11-09 | 2016-11-09 | For IPOE authentication methods, device and the server of client detection |
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