CN103051738A - DHCP (Dynamic Host Configuration Protocol) address distribution method and system - Google Patents
DHCP (Dynamic Host Configuration Protocol) address distribution method and system Download PDFInfo
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Abstract
The invention discloses a DHCP (Dynamic Host Configuration Protocol) address distribution method and system. The method comprises the steps that A, a router receives and stores a port mark of a DHCP client permitted to automatically obtain an IP (Internet Protocol) address through a WEB page by a user; B, when the DHCP client is connected to a DHCP server through the router, the DHCP client broadcasts and sends a DHCP finding data packet; C, the router judges whether the port mark of the DHCP client which sends the DHCP finding data packet is matched with the port mark stored or not, if so, executing the step D; if not, executing the step E; D, the router informs the DHCP server to store the DHCP finding data packet and the DHCP server responds the DHCP client with a DHCP providing data packet to permit the DHCP client to obtain the IP address by way of DHCP; and E, the router abandons the data packet and finishes a DHCP session to force the DHCP client to obtain a static IP address. With the adoption of the technical scheme provided by the invention, the address of the DHCP client is convenient to maintain and manage by the DHCP server.
Description
Technical field
The present invention relates to network field, relates in particular to a kind of dhcp address distribution method and system.
Background technology
DHCP is Dynamic Host Configuration Protocol (DHCP) abbreviation, and it comprises Dynamic Host Configuration Protocol server end and dhcp client.All IP network setting datas are all by Dynamic Host Configuration Protocol server centralized management, and are responsible for processing the DHCP requirement of dhcp client, and dhcp client then can use the IP world data of getting off from server-assignment.When we need to dispose a station server in local area network (LAN), adopt the DHCP mode to obtain the address, the address of at every turn starting shooting all needs again to obtain, and the rental period restriction is arranged, and therefore is unfavorable for the maintenance and management of server etc.
Summary of the invention
The technical problem to be solved in the present invention is, the address that obtains by the DHCP mode for the above-mentioned dhcp client of prior art is unfavorable for the maintenance and management defective of server, a kind of dhcp address distribution method and system are provided, are convenient to the address of server maintenance and management dhcp client.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of dhcp address distribution method, comprising:
A. router receives and preserves the user by the port label of the dhcp client of the permission automatic acquisition IP address of WEB page setup;
B. after dhcp client was connected to Dynamic Host Configuration Protocol server by router, dhcp client broadcast transmission DHCP found packet;
C. router is according to the configuration information of described steps A, judges whether send the port label that this DHCP finds the dhcp client of packet mates with the port label of preserving, if, execution in step D then; If not, execution in step E then;
D. the router advertisement Dynamic Host Configuration Protocol server is preserved this DHCP and is found packet, and Dynamic Host Configuration Protocol server responds DHCP to this dhcp client packet is provided, and obtains the IP address to allow this dhcp client with the mode of DHCP;
E. router abandons this packet, and finishes the DHCP session, obtains static ip address to force this dhcp client.
In dhcp address distribution method of the present invention, comprising: in described step D, realize in the following manner allowing this dhcp client to obtain the IP address with the mode of DHCP:
Dhcp client is resolved the DHCP that receives packet is provided, and provides packet to accept IP address and rental period restricted information that Dynamic Host Configuration Protocol server distributes according to this DHCP.
In dhcp address distribution method of the present invention, comprising: in described step e, realize in the following manner forcing this dhcp client that static ip address is set:
Receive the static ip address that the user arranges for this dhcp client.
In dhcp address distribution method of the present invention, before described step B, also comprise:
F. router receives and preserves the user by the specified Dynamic Host Configuration Protocol server information of dhcp client of WEB page setup;
Between described step B and described step C, also comprise:
G. router finds that with this DHCP package forward is to specified Dynamic Host Configuration Protocol server according to the configuration information of described step F.
In dhcp address distribution method of the present invention, specified Dynamic Host Configuration Protocol server information is mac address information or the IP address of Dynamic Host Configuration Protocol server.
In dhcp address distribution method of the present invention, described step D comprises:
D1. the router advertisement Dynamic Host Configuration Protocol server is preserved this DHCP and is found packet;
The D2.DHCP server is verified the DHCP discovery packet that receives;
When the D3.DHCP server passes through in checking, respond DHCP to this dhcp client packet is provided;
The D4.DHCP client provides packet to verify to the DHCP that receives;
When the D5.DHCP client is passed through in checking, resolve the DHCP that receives packet is provided, and provide packet to accept IP address and rental period restricted information that Dynamic Host Configuration Protocol server distributes according to this DHCP.
The present invention also constructs a kind of dhcp address distribution system, comprises Dynamic Host Configuration Protocol server, dhcp client and router, and described router comprises:
The first receiver module is used for reception and preserves the user by the port label of the dhcp client of the permission automatic acquisition IP address of WEB page setup;
Judge module, for the configuration information that receives according to described the first receiver module, whether the port label of judging the dhcp client that sends this DHCP discovery packet mates with the port label of preserving, wherein, after dhcp client was connected to Dynamic Host Configuration Protocol server by router, dhcp client broadcast transmission DHCP found packet;
Executive Module is used in judged result during for coupling, and the notice Dynamic Host Configuration Protocol server is preserved this DHCP and found packet, and Dynamic Host Configuration Protocol server responds DHCP to this dhcp client packet is provided, and obtains the IP address to allow this dhcp client with the mode of DHCP;
Discard module is used in judged result abandoning this packet when not mating, and end DHCP session, obtains static ip address to force this dhcp client.
In dhcp address distribution system of the present invention, described router also comprises:
The second receiver module is used for receiving and preserving the specified Dynamic Host Configuration Protocol server information of dhcp client that the user passes through the WEB page setup;
Forwarding module for the configuration information that receives according to described the second receiver module, finds that with this DHCP package forward is to specified Dynamic Host Configuration Protocol server.
In dhcp address distribution system of the present invention, when judged result was coupling, dhcp client was resolved the DHCP that receives packet is provided, and provided packet to accept IP address and rental period restricted information that Dynamic Host Configuration Protocol server distributes according to this DHCP.
In dhcp address distribution system of the present invention,, receive the user and be the static ip address of this dhcp client setting when not mating in judged result.
Implement technical scheme of the present invention, whether the port that the user can control dhcp client can automatic acquisition IP address, cannot automatic acquisition IP address if the port of certain dhcp client is arranged to, then force this dhcp client that static ip address must be set, thereby can realize binding specific transactions according to particular ip address, make things convenient for the address of Dynamic Host Configuration Protocol server maintenance and management dhcp client.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the flow chart of dhcp address distribution method embodiment one of the present invention;
Fig. 2 is the flow chart of dhcp address distribution method embodiment two of the present invention;
Fig. 3 is the flow chart of step D embodiment one in the dhcp address distribution method of the present invention;
Fig. 4 is the logic diagram of dhcp address distribution system embodiment one of the present invention.
Embodiment
Fig. 1 is the flow chart of dhcp address distribution method embodiment one of the present invention, and this dhcp address distribution method comprises:
A. router receives and preserves the user by the port label of the dhcp client of the permission automatic acquisition IP address of WEB page setup, in this step, the user to the port marking of dhcp client, arranges the dhcp client port of static ip address with dhcp client port and the pressure of distinguishing energy automatic acquisition IP address in the linux kernel;
B. after dhcp client is connected to Dynamic Host Configuration Protocol server by router, dhcp client broadcast transmission DHCP finds (Discover) packet, in this step, dhcp client is in start, or when restarting network card, can send automatically DHCP discovery packet to every computer in the net territory, and other computer (Dynamic Host Configuration Protocol server) that does not provide DHCP to serve in the net territory receives that this package can abandon this package and do not respond afterwards automatically;
C. router is according to the configuration information of described steps A, judges whether send the port label that this DHCP finds the dhcp client of packet mates with the port label of preserving, if, execution in step D then; If not, execution in step E then;
D. the router advertisement Dynamic Host Configuration Protocol server is preserved this DHCP and is found packet, and Dynamic Host Configuration Protocol server is responded DHCP to this dhcp client (Offer) packet is provided, to allow this dhcp client to obtain the IP address with the mode of DHCP, for example, realize in the following manner allowing this dhcp client to obtain the IP address with the mode of DHCP: dhcp client is resolved the DHCP that receives packet is provided, and provides packet to accept IP address and rental period restricted information that Dynamic Host Configuration Protocol server distributes according to this DHCP;
E. router abandons this packet, and end DHCP session, to force this dhcp client to obtain static ip address, for example, realize in the following manner forcing this dhcp client that static ip address is set: receive the static ip address that the user arranges for this dhcp client.
Implement this technical scheme, whether the port that the user can control dhcp client can automatic acquisition IP address, cannot automatic acquisition IP address if the port of certain dhcp client is arranged to, then force this dhcp client that static ip address must be set, thereby can realize binding specific transactions according to particular ip address, make things convenient for the address of Dynamic Host Configuration Protocol server maintenance and management dhcp client.
Fig. 2 is the flow chart of dhcp address distribution method embodiment two of the present invention, the dhcp address distribution method of this embodiment is applicable to exist in the network situation of many Dynamic Host Configuration Protocol server, in order to alleviate the burden of network operation and management, present embodiment improves the dhcp address distribution method again on the basis of embodiment shown in Figure 1, namely, compare embodiment shown in Figure 1, difference only is: one, before steps A, also comprise: the F. router receives and preserves the user by the specified Dynamic Host Configuration Protocol server information of dhcp client of WEB page setup.This explanation be, although shown in this embodiment be step F before steps A,, in other embodiments, step F also can be after steps A, as long as guarantee that step F is just passable before step B; Two, between step B and step C, also comprise: the G. router finds that with this DHCP package forward is to specified Dynamic Host Configuration Protocol server according to the configuration information of step F.By implementing the technical scheme of this embodiment, specify the Dynamic Host Configuration Protocol server of trusting by dhcp client, can alleviate the burden of network operation and management.
Fig. 3 is the flow chart of step D embodiment one in the dhcp address distribution method of the present invention, and when router judged that the port label of the dhcp client that sends this DHCP discovery packet is mated with the port label of preserving, step D can specifically comprise:
D1. the router advertisement Dynamic Host Configuration Protocol server is preserved this DHCP and is found packet;
The D2.DHCP server is verified the DHCP discovery packet that receives;
When the D3.DHCP server passes through in checking, respond DHCP to this dhcp client packet is provided;
The D4.DHCP client provides packet to verify to the DHCP that receives;
When the D5.DHCP client is passed through in checking, resolve the DHCP that receives packet is provided, and provide packet to accept IP address and rental period restricted information that Dynamic Host Configuration Protocol server distributes according to this DHCP.
Implement the technical scheme of this embodiment, can guarantee the communication security between Dynamic Host Configuration Protocol server and the dhcp client.
Fig. 4 is the logic diagram of dhcp address distribution system embodiment one of the present invention, this dhcp address distribution system comprises Dynamic Host Configuration Protocol server 20, router one 0 and the dhcp client 30 that is connected, in this explanation be, although only show a Dynamic Host Configuration Protocol server 20 and a dhcp client 30 among the figure, the present invention does not limit the quantity of Dynamic Host Configuration Protocol server and dhcp client.And, in this embodiment, router one 0 comprises: the first receiver module 11, judge module 12, Executive Module 13 and discard module 14, and wherein, the first receiver module 11 is used for receiving and preserves the user by the port label of the dhcp client of the permission automatic acquisition IP address of WEB page setup; Judge module 12 is for the configuration information that receives according to described the first receiver module, (for example judge the dhcp client of this DHCP discovery packet of transmission, whether port label dhcp client 30) mates with the port label of preserving, wherein, when dhcp client (for example is connected to Dynamic Host Configuration Protocol server by router, Dynamic Host Configuration Protocol server 20) after, dhcp client broadcast transmission DHCP finds packet; Executive Module 13 is used for when judged result is coupling, the notice Dynamic Host Configuration Protocol server is preserved this DHCP and is found packet, and Dynamic Host Configuration Protocol server is responded DHCP to this dhcp client packet is provided, to allow this dhcp client to obtain the IP address with the mode of DHCP, for example, dhcp client is resolved the DHCP that receives packet is provided, and provides packet to accept IP address and rental period restricted information that Dynamic Host Configuration Protocol server distributes according to this DHCP; Discard module 14 is used in judged result abandoning this packet, and finishing the DHCP session when not mating, and obtains static ip address to force this dhcp client, and for example, receiving the user is the static ip address of this dhcp client setting.
In a preferred embodiment of dhcp address distribution system of the present invention, when the quantity of Dynamic Host Configuration Protocol server in network when being a plurality of, router also comprises the second receiver module and forwarding module, wherein, the second receiver module is used for receiving and preserves the user by the specified Dynamic Host Configuration Protocol server information of dhcp client of WEB page setup; Forwarding module is used for the configuration information according to described the second receiver module, and this DHCP is found that package forward is to specified Dynamic Host Configuration Protocol server.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (10)
1. a dhcp address distribution method is characterized in that, comprising:
A. router receives and preserves the user by the port label of the dhcp client of the permission automatic acquisition IP address of WEB page setup;
B. after dhcp client was connected to Dynamic Host Configuration Protocol server by router, dhcp client broadcast transmission DHCP found packet;
C. router is according to the configuration information of described steps A, judges whether send the port label that this DHCP finds the dhcp client of packet mates with the port label of preserving, if, execution in step D then; If not, execution in step E then;
D. the router advertisement Dynamic Host Configuration Protocol server is preserved this DHCP and is found packet, and Dynamic Host Configuration Protocol server responds DHCP to this dhcp client packet is provided, and obtains the IP address to allow this dhcp client with the mode of DHCP;
E. router abandons this packet, and finishes the DHCP session, obtains static ip address to force this dhcp client.
2. dhcp address distribution method according to claim 1 is characterized in that, comprising: in described step D, realize in the following manner allowing this dhcp client to obtain the IP address with the mode of DHCP:
Dhcp client is resolved the DHCP that receives packet is provided, and provides packet to accept IP address and rental period restricted information that Dynamic Host Configuration Protocol server distributes according to this DHCP.
3. dhcp address distribution method according to claim 1 is characterized in that, comprising: in described step e, realize in the following manner forcing this dhcp client that static ip address is set:
Receive the static ip address that the user arranges for this dhcp client.
4. dhcp address distribution method according to claim 1 is characterized in that, before described step B, also comprises:
F. router receives and preserves the user by the specified Dynamic Host Configuration Protocol server information of dhcp client of WEB page setup;
Between described step B and described step C, also comprise:
G. router finds that with this DHCP package forward is to specified Dynamic Host Configuration Protocol server according to the configuration information of described step F.
5. dhcp address distribution method according to claim 4 is characterized in that, specified Dynamic Host Configuration Protocol server information is mac address information or the IP address of Dynamic Host Configuration Protocol server.
6. dhcp address distribution method according to claim 1 is characterized in that, described step D comprises:
D1. the router advertisement Dynamic Host Configuration Protocol server is preserved this DHCP and is found packet;
D2. Dynamic Host Configuration Protocol server is verified the DHCP discovery packet that receives;
When the D3.DHCP server passes through in checking, respond DHCP to this dhcp client packet is provided;
D4. dhcp client provides packet to verify to the DHCP that receives;
D5. dhcp client is resolved the DHCP that receives packet is provided when checking is passed through, and provides packet to accept IP address and rental period restricted information that Dynamic Host Configuration Protocol server distributes according to this DHCP.
7. a dhcp address distribution system comprises Dynamic Host Configuration Protocol server, dhcp client and router, it is characterized in that, described router comprises:
The first receiver module is used for reception and preserves the user by the port label of the dhcp client of the permission automatic acquisition IP address of WEB page setup;
Judge module, for the configuration information that receives according to described the first receiver module, whether the port label of judging the dhcp client that sends this DHCP discovery packet mates with the port label of preserving, wherein, after dhcp client was connected to Dynamic Host Configuration Protocol server by router, dhcp client broadcast transmission DHCP found packet;
Executive Module is used in judged result during for coupling, and the notice Dynamic Host Configuration Protocol server is preserved this DHCP and found packet, and Dynamic Host Configuration Protocol server responds DHCP to this dhcp client packet is provided, and obtains the IP address to allow this dhcp client with the mode of DHCP;
Discard module is used in judged result abandoning this packet when not mating, and end DHCP session, obtains static ip address to force this dhcp client.
8. dhcp address distribution system according to claim 7 is characterized in that, described router also comprises:
The second receiver module is used for receiving and preserving the specified Dynamic Host Configuration Protocol server information of dhcp client that the user passes through the WEB page setup;
Forwarding module for the configuration information that receives according to described the second receiver module, finds that with this DHCP package forward is to specified Dynamic Host Configuration Protocol server.
9. dhcp address distribution system according to claim 7, it is characterized in that, when judged result was coupling, dhcp client was resolved the DHCP that receives packet is provided, and provided packet to accept IP address and rental period restricted information that Dynamic Host Configuration Protocol server distributes according to this DHCP.
10. dhcp address distribution system according to claim 7 is characterized in that,, receives the user and is the static ip address of this dhcp client setting when not mating in judged result.
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| CN201210529137.7A CN103051738B (en) | 2012-12-10 | 2012-12-10 | A kind of dhcp address distribution method and system |
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| CN106790701A (en) * | 2017-02-23 | 2017-05-31 | 郑州云海信息技术有限公司 | It is a kind of to orient the method and device that Dynamic Host Configuration Protocol server is specified in request |
| CN107483652A (en) * | 2017-08-18 | 2017-12-15 | 惠州高盛达科技有限公司 | The method of router its homepage of domain name access under wireless bridging pattern |
| CN107592243A (en) * | 2017-10-23 | 2018-01-16 | 上海斐讯数据通信技术有限公司 | A kind of method and device for verifying router static binding function |
| CN107809498A (en) * | 2017-10-26 | 2018-03-16 | 迈普通信技术股份有限公司 | Communication means and communicator |
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| CN103051738B (en) | 2016-01-06 |
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