CN101286991B - Implementing method and device for dynamic host configuring protocol Option82 - Google Patents
Implementing method and device for dynamic host configuring protocol Option82 Download PDFInfo
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- CN101286991B CN101286991B CN2008101085162A CN200810108516A CN101286991B CN 101286991 B CN101286991 B CN 101286991B CN 2008101085162 A CN2008101085162 A CN 2008101085162A CN 200810108516 A CN200810108516 A CN 200810108516A CN 101286991 B CN101286991 B CN 101286991B
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Abstract
The invention discloses a realization method for a dynamic host configuration protocol Option82 and a device thereof, wherein, the method comprises the steps that: ports used for receiving DHCP messages are configured with the DHCP Option82 function; according to the connection objects of the ports, the ports are divided into various types comprising a server port, a user port and an uplink port; access equipment receives the DHCP messages, wherein, in the situation that the server port receives the DHCP messages carrying the options of the Option82, the DHCP messages are transmitted to the uplink port or the corresponding user port according to the options of the Option82; in the situation that the client end port receives the DHCP messages, according to the identification information of user equipment corresponding to the DHCP messages, the options of the Option82 are formed and added into the DHCP messages, and the DHCP messages added with the options of the Option82 are transmitted to the server port; in the situation that the uplink port receives the DHCP messages, the DHCP messages are transmitted to the server port. The method and the device can solve the problem that in the situation of cascading access equipment, users can not be positioned and differentiated according to the Option82.
Description
Technical field
The present invention relates to computer network field, in particular to a kind of DHCP (Dynamic Host Configure Protocol abbreviates DHCP as) Option82 implementation method and device.
Background technology
Along with the development of access technology, the requirement of butt joint access customer location and identification also improves constantly.User location and identification are meant the ability known to user's physical positioning information such as access server and Service Gateway.DHCP Option82 provides identification to insert a kind of technology of user profile to equipment such as access servers.For making access device grasp the information of the subscriber equipment that inserts, realize that at access device DHCP Option82 technology is more and more general.
Along with the access customer number amount increases, an access point inserts a subscriber equipment and can not satisfy application demand, and the networking that has thereupon produced the access device cascade is used.But, for its downward cascade port correspondence of an access device a plurality of access users, and insert user location and identifying information be with access device on the subscriber connection mouth corresponding, prior art can't be distinguished out a plurality of access users of the descending correspondence of cascade port, thereby makes the access information of a plurality of subscriber equipmenies identical.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: can't accurately locate and distinguish subscriber equipment during a plurality of access device cascade.
Summary of the invention
The present invention aims to provide a kind of dynamic host configuring protocol Option 82 implementation method and device, can't accurately locate and distinguish the problem of subscriber equipment when solving a plurality of access device cascade.
According to an aspect of the present invention, provide a kind of dynamic host configuring protocol Option 82 implementation method, be used for the access device cascade.
Dynamic host configuring protocol Option 82 implementation method according to the embodiment of the invention comprises: to being used to receive the port arrangement dynamic host configuring protocol Option 82 function of dynamic host configuration protocol message, and according to the connecting object of port port is divided into following type: Service-Port, user port, cascade port; Access device receives dynamic host configuration protocol message; Wherein, receive dynamic host configuration protocol message and dynamic host configuration protocol message carries under the situation of Option82 option at Service-Port, dynamic host configuration protocol message is forwarded to cascade port or corresponding user port according to the Option82 option; Receive at user port under the situation of dynamic host configuration protocol message, according to the identification information structure Option82 option of the subscriber equipment of dynamic host configuration protocol message correspondence and add in the dynamic host configuration protocol message, and the dynamic host configuration protocol message that has added the Option82 option is forwarded to Service-Port; Receive at the cascade port under the situation of dynamic host configuration protocol message, dynamic host configuration protocol message is forwarded to Service-Port.
Preferably, receive at Service-Port under the situation of dynamic host configuration protocol message, the processing that dynamic host configuration protocol message is forwarded to cascade port or corresponding user port specifically comprises: judge whether the Option82 option that dynamic host configuration protocol message carries is that user port adds; Be judged as under the situation that is, resolving and excision Option82 option, and dynamic host configuration protocol message is being forwarded to corresponding user port; Otherwise, dynamic host configuration protocol message is forwarded to the cascade port.
Preferably, receive at Service-Port under the situation of dynamic host configuration protocol message, if dynamic host configuration protocol message does not carry the Option82 option, said method also comprises: the heading field according to dynamic host configuration protocol message is judged the pass-through mode that dynamic host configuration protocol message requires; Require at dynamic host configuration protocol message under the situation of broadcasting forwarding dynamic host configuration protocol message to be forwarded to cascade port and user port; Require at dynamic host configuration protocol message dynamic host configuration protocol message to be forwarded to the port of appropriate address under the situation of clean culture forwarding.
Preferably, receive at user port under the situation of dynamic host configuration protocol message, said method further comprises: whether the length of judging the dynamic host configuration protocol message of the Option82 option that has added structure surpasses predetermined length; Be judged as under the situation that is, in dynamic host configuration protocol message, do not adding the Option82 option, directly dynamic host configuration protocol message is being forwarded to Service-Port; Otherwise in dynamic host configuration protocol message, add Option82, and the dynamic host configuration protocol message that has added Option82 is forwarded to Service-Port.
Preferably, Service-Port is the port of up Connection Service device; User port is the port that is connected with subscriber equipment; The cascade port is the port of descending cascade access device.
According to a further aspect in the invention, also provide a kind of dynamic host configuring protocol Option 82 implement device, be used for the cascade access device.
Dynamic host configuring protocol Option 82 implement device according to the embodiment of the invention comprises: a kind of dynamic host configuring protocol Option 82 implement device that is used for the cascade access device, be arranged at access device, it is characterized in that, comprise: Service-Port, the dynamic host configuration protocol message and the dynamic host configuration protocol message that are used to receive from server carry under the situation of Option82 option, according to the Option82 option dynamic host configuration protocol message are forwarded to cascade port or corresponding user port; User port, be used to receive dynamic host configuration protocol message from subscriber equipment, according to the identification information structure Option82 option of the subscriber equipment of dynamic host configuration protocol message correspondence and add in the dynamic host configuration protocol message, and the dynamic host configuration protocol message that has added the Option82 option is forwarded to Service-Port; The cascade port is used to receive the dynamic host configuration protocol message from descending cascade access device, and dynamic host configuration protocol message is forwarded to Service-Port.
Preferably, this device can further comprise: judge module is used to judge whether the Option82 option that dynamic host configuration protocol message carries is that user port adds; Forwarding module, the structure that is used for judging at judge module is under the situation that is, resolves and excision Option82 option, and dynamic host configuration protocol message is forwarded to corresponding user port; Otherwise, dynamic host configuration protocol message is forwarded to the cascade port.
Preferably, this device can further comprise: determination module, be used for not carrying under the situation of Option82 option, judge the pass-through mode that dynamic host configuration protocol message requires according to the heading field of dynamic host configuration protocol message at the dynamic host configuration protocol message that Service-Port receives from server; Broadcast module is used under the situation that dynamic host configuration protocol message requirement broadcasting is transmitted dynamic host configuration protocol message being forwarded to cascade port and user port; The clean culture module is used for dynamic host configuration protocol message being forwarded to the port of appropriate address under the situation that dynamic host configuration protocol message requirement clean culture is transmitted.
Preferably, user port also is used for: the dynamic host configuration protocol message after adding the Option82 option surpasses under the situation of predetermined length, in dynamic host configuration protocol message, do not add the Option82 option, directly dynamic host configuration protocol message is forwarded to Service-Port.
By dynamic host configuring protocol Option 82 implementation method and the device that the present invention proposes, can solve under the situation of access device cascade and can't and distinguish user's problem according to the Option82 location.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows according to the networking of the embodiment of the invention and uses schematic diagram;
Fig. 2 shows the flow chart according to the DHCP Option82 implementation method of the embodiment of the invention;
Fig. 3 shows the flow chart of DHCP Option82 implementation method according to the preferred embodiment of the invention;
Fig. 4 shows the block diagram according to the DHCP Option82 implement device of apparatus of the present invention embodiment.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Method embodiment
Fig. 1 shows network application scene of the present invention, the port of access device is divided three classes: user port, cascade port and Service-Port.On the port attribute basis, realize DHCP Option82 function.
As shown in Figure 1, this network comprises access device 1 and access device 2.101 is the Service-Port of access device 1, and this port is up Connection Service device; 102 is the user port of access device 1, and this port is direct-connected subscriber equipment; 103 is the cascade port of access device 1, the descending cascade of this port access device 2.104 is the Service-Port of access device 2, and this port is up Connection Service device; 105 is the user port of access device 2, this direct port connection subscriber equipment.
As shown in Figure 2, the DHCP Option82 implementation method according to the embodiment of the invention comprises following processing:
Step S202 to being used to receive the port arrangement DHCP Option82 function of DHCP message, and is divided into following type according to the connecting object of port with port: Service-Port, user port, cascade port;
Step S204, access device receives the DHCP message;
Step S206 wherein, receives the DHCP message and the DHCP message carries under the situation of Option82 option at Service-Port, according to the Option82 option DHCP message is forwarded to cascade port or corresponding user port;
Step S208, receive at user port under the situation of DHCP message, according to the identification information structure Option82 option of the subscriber equipment of DHCP message correspondence and add in the DHCP message, and the DHCP message that has added the Option82 option is forwarded to Service-Port;
Step S210 receives at the cascade port under the situation of DHCP message, and the DHCP message is forwarded to Service-Port.
Wherein, receive at Service-Port under the situation of DHCP message, the processing that the DHCP message is forwarded to cascade port or corresponding user port specifically comprises: judge whether the Option82 option that the DHCP message carries is that user port adds; Be judged as under the situation that is, resolving and excision Option82 option, and the DHCP message is being forwarded to corresponding user port; Otherwise, the DHCP message is forwarded to the cascade port.
And, receive at Service-Port under the situation of DHCP message, if the DHCP message does not carry the Option82 option, then said method also comprises: the heading field according to the DHCP message is judged the pass-through mode that the DHCP message requires; Require at the DHCP message under the situation of broadcasting forwarding the DHCP message to be forwarded to cascade port and user port; Require at the DHCP message DHCP message to be forwarded to the port of appropriate address under the situation of clean culture forwarding.
By this embodiment, according to port attribute message is transmitted, reduced the influence of broadcasting inundation.
In addition, receive at user port under the situation of DHCP message, said method further comprises: whether the length of judging the DHCP message of the Option82 option that has added structure surpasses predetermined length; Be judged as under the situation that is, in the DHCP message, do not adding the Option82 option, directly the DHCP message is being forwarded to Service-Port; Otherwise in the DHCP message, add Option82, and the DHCP message that has added Option82 is forwarded to Service-Port.
By the foregoing description, can solve under the situation of access device cascade and can't and distinguish user's problem according to the Option82 location.
As shown in Figure 3, DHCP Option82 implementation method according to the preferred embodiment of the invention comprises following processing:
Step S302, access device receive the DHCP message, and coupling receives the message port attribute;
Step S304, the port that receives message is a user port, according to the information structuring Option82 option of the subscriber equipment of port correspondence, and adds the DHCP message to;
Step S306, judge to add the DHCP message overlength whether behind the Option82 option of structure: if, then do not add the Option82 option, directly this DHCP message is forwarded to Service-Port; Otherwise, insert the Option82 option, and the DHCP message be forwarded to Service-Port;
Step S308, the port that receives message is the cascade port, the DHCP message has added the Option82 option by descending access device, directly transmits to Service-Port;
Step S310, the port that receives message is a Service-Port, judges whether the DHCP message carries the Option82 option;
Step S312, the DHCP message does not carry the Option82 option, determines forwarding strategy according to DHCP heading broadcasting field: if this field requires broadcasting to transmit, then this message is forwarded to all user ports and cascade port; If this field requires clean culture to transmit, then finish unicast addressed and transmit by access device;
Step S314, the DHCP message carries the Option82 option, judges whether this Option82 option is the interpolation of this equipment: if not, then be that descending access device adds, therefore message is forwarded to the cascade port, handle by descending access device;
Step S316, the Option82 option that the DHCP message carries are identified as this equipment to be added, and is forwarded to corresponding user port behind parsing and the excision Option82 option.
Device embodiment
As shown in Figure 4, dynamic host configuring protocol Option 82 implement device according to the embodiment of the invention, comprise: Service-Port 10, the DHCP message and the DHCP message that are used to receive from server carry under the situation of Option82 option, according to the Option82 option DHCP message are forwarded to cascade port or corresponding user port; User port 20, be used to receive DHCP message from subscriber equipment, according to the identification information structure Option82 option of the subscriber equipment of DHCP message correspondence and add in the DHCP message, and the DHCP message that has added the Option82 option is forwarded to Service-Port; Cascade port 30 is used to receive the DHCP message from descending cascade access device, and the DHCP message is forwarded to Service-Port.
Wherein, this device can further comprise: the judge module (not shown) is used to judge whether the Option82 option that the DHCP message carries is that user port adds; The forwarding module (not shown), the structure that is used for judging at judge module is under the situation that is, resolves and excision Option82 option, and the DHCP message is forwarded to corresponding user port; Otherwise, the DHCP message is forwarded to the cascade port.
And, this device may further include: the determination module (not shown), be used for not carrying under the situation of Option82 option, judge the pass-through mode that dynamic host configuration protocol message requires according to the heading field of dynamic host configuration protocol message at the dynamic host configuration protocol message that Service-Port receives from server; The broadcast module (not shown) is used under the situation that DHCP message requirement broadcasting is transmitted the DHCP message being forwarded to cascade port and user port; Clean culture module (not shown) is used for the DHCP message being forwarded to the port of appropriate address under the situation that DHCP message requirement clean culture is transmitted.
In addition, user port 20 also is used for: the DHCP message after adding the Option82 option surpasses under the situation of predetermined length, does not add the Option82 option in the DHCP message, directly the DHCP message is forwarded to Service-Port.
Technical scheme of the present invention is not conflicted with DHCP Snooping technology, can be in conjunction with realization, and the corresponding trusted port of Service-Port, cascade port and user port can be regarded as the segmentation of non-trusted port, need not existing protocol is changed.
In sum, by DHCP Option82 implementation method and the device that the present invention proposes, can solve under the situation of access device cascade and can't and distinguish user's problem according to the Option82 location.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
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 changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a dynamic host configuring protocol Option 82 implementation method that is used for the access device cascade is characterized in that, comprising:
To being used to receive the port arrangement dynamic host configuring protocol Option 82 function of dynamic host configuration protocol message, and described port is divided into following type: Service-Port, user port, cascade port according to the connecting object of described port;
Access device receives described dynamic host configuration protocol message;
Wherein, receive descending described dynamic host configuration protocol message and described dynamic host configuration protocol message carries under the situation of Option82 option at described Service-Port, described dynamic host configuration protocol message is forwarded to described cascade port or corresponding described user port according to described Option82 option;
Receive at described user port under the situation of up described dynamic host configuration protocol message, according to the identification information structure Option82 option of the subscriber equipment of described dynamic host configuration protocol message correspondence and add in the described dynamic host configuration protocol message, and the described dynamic host configuration protocol message that has added described Option82 option is forwarded to described Service-Port;
Receive under the situation of up described dynamic host configuration protocol message at described cascade port, described dynamic host configuration protocol message is forwarded to described Service-Port.
2. method according to claim 1, it is characterized in that, receive described dynamic host configuration protocol message and described dynamic host configuration protocol message carries under the situation of Option82 option at described Service-Port, the processing that described dynamic host configuration protocol message is forwarded to described cascade port or corresponding described user port specifically comprises:
Judge whether the described Option82 option that described dynamic host configuration protocol message carries is that described user port adds;
Be judged as under the situation that is, resolving and extracing described Option82 option, and described dynamic host configuration protocol message is being forwarded to corresponding described user port; Otherwise, described dynamic host configuration protocol message is forwarded to described cascade port.
3. method according to claim 1 is characterized in that, receives at described Service-Port under the situation of described dynamic host configuration protocol message, if described dynamic host configuration protocol message does not carry the Option82 option, then described method also comprises:
Heading field according to described dynamic host configuration protocol message is judged the pass-through mode that described dynamic host configuration protocol message requires;
Require at described dynamic host configuration protocol message under the situation of broadcasting forwarding described dynamic host configuration protocol message to be forwarded to described cascade port and described user port;
Require at described dynamic host configuration protocol message described dynamic host configuration protocol message to be forwarded to the port of appropriate address under the situation of clean culture forwarding.
4. method according to claim 1 is characterized in that, receives at described user port under the situation of described dynamic host configuration protocol message, further comprises:
Whether the length of judging the described dynamic host configuration protocol message of the described Option82 option that has added structure surpasses predetermined length;
Be judged as under the situation that is, in described dynamic host configuration protocol message, do not adding described Option82 option, directly described dynamic host configuration protocol message is being forwarded to described Service-Port; Otherwise in described dynamic host configuration protocol message, add described Option82 option, and the dynamic host configuration protocol message that has added described Option82 option is forwarded to described Service-Port.
5. according to each described method in the claim 1 to 4, it is characterized in that,
Described Service-Port is the port of up Connection Service device;
Described user port is the port that is connected with subscriber equipment;
Described cascade port is the port of descending cascade access device.
6. a dynamic host configuring protocol Option 82 implement device that is used for the cascade access device is arranged at access device, it is characterized in that, comprising:
Service-Port, the dynamic host configuration protocol message and the described dynamic host configuration protocol message that are used to receive from described server carry under the situation of Option82 option, according to described Option82 option described dynamic host configuration protocol message are forwarded to cascade port or corresponding user port;
Described user port, be used to receive described dynamic host configuration protocol message from subscriber equipment, according to the identification information structure Option82 option of the subscriber equipment of described dynamic host configuration protocol message correspondence and add in the described dynamic host configuration protocol message, and the described dynamic host configuration protocol message that has added described Option82 option is forwarded to described Service-Port;
Described cascade port is used to receive the described dynamic host configuration protocol message from descending cascade access device, and described dynamic host configuration protocol message is forwarded to described Service-Port.
7. device according to claim 6 is characterized in that, also comprises:
Judge module, be used for receiving described dynamic host configuration protocol message and described dynamic host configuration protocol message carries under the situation of Option82 option, judge whether the described Option82 option that described dynamic host configuration protocol message carries is that described user port adds at described Service-Port;
Forwarding module, the structure that is used for judging at judge module is under the situation that is, resolves and extracts described Option82 option, and described dynamic host configuration protocol message is forwarded to corresponding described user port; Otherwise, described dynamic host configuration protocol message is forwarded to described cascade port.
8. device according to claim 7 is characterized in that, also comprises:
Determination module, be used for not carrying under the situation of described Option82 option, judge the pass-through mode that described dynamic host configuration protocol message requires according to the heading field of described dynamic host configuration protocol message at the described dynamic host configuration protocol message that described Service-Port receives from described server;
Broadcast module is used under the situation that described dynamic host configuration protocol message requirement broadcasting is transmitted described dynamic host configuration protocol message being forwarded to described cascade port and described user port;
The clean culture module is used for described dynamic host configuration protocol message being forwarded to the port of appropriate address under the situation that described dynamic host configuration protocol message requirement clean culture is transmitted.
9. device according to claim 6 is characterized in that, described user port also is used for:
Described dynamic host configuration protocol message after adding described Option82 option surpasses under the situation of predetermined length, in described dynamic host configuration protocol message, do not add described Option82 option, directly described dynamic host configuration protocol message is forwarded to described Service-Port.
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| CN102487396B (en) * | 2010-12-02 | 2015-04-01 | 中兴通讯股份有限公司 | User position determining method and system |
| CN103634844A (en) * | 2012-08-24 | 2014-03-12 | 中兴通讯股份有限公司 | Method and system for realizing distributed multi-port DHCP relay |
| CN103297562A (en) * | 2013-05-31 | 2013-09-11 | 深圳市共进电子股份有限公司 | Method, equipment and system for realizing Option82 processing based on kernel |
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