CN102014175A - DHCPv6 protocol-based IPv4 address distribution method and system - Google Patents
DHCPv6 protocol-based IPv4 address distribution method and system Download PDFInfo
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Abstract
The invention discloses a dynamic host configuration protocol for IPv6 (DHCPv6)-based IPv4 address distribution method. A DHCPv4 message option is increased for carrying DHCPv4 message; and an IPv6/IPv4 address is configured on a DHCPv6 server. The method comprises that: a DHCPv6 client is interacted with the DHCPv6 server through the message carrying the DHCPv4 message option so as to realize IPv4 address distribution. The invention discloses a DHCPv6 protocol-based IPv4 address distribution system at the same time. The method and the system realize unified encapsulation related with the IPv4 address, and process the protocol unified in an IPv6 network and independent from DHCPv4 by directly using the original DHCPv4 protocol stack realization mechanism during operation so that the network adaptation is more flexible; and the method and the system are convenient and quick in actual application, and realize complete and unified functions.
Description
Technical field
The present invention relates to the IP address assignment technology, relate in particular to a kind of based on the 6th edition (DHCPv6 of DHCP the Internet communication protocol, Dynamic Host Configuration Protocol for IPv6) protocol of I Pv4 address distribution method and system.
Background technology
IPv4 (the Internet communication protocol the 4th edition) rapid development of network, make the IPv4 network deficiency of aspects such as the limitation of address space, performance, fail safe, automatic configuration occur, in order to improve these deficiencies, expanded the 6th edition (IPv6) agreement of follow-on the Internet communication protocol.The IPv6 network is also in the early stage of development, but for a long time, the IPv4 network will exist, and two protocol stacks of IPv4, IPv6 and the environment of depositing will long-term existence.
In order to solve excessive strategy, method has IPv6 protocol tunnel mode and IPv4/IPv6 dual stack method at present, the address assignment of IPv6 also can adopt DHCPv6 to come dynamic-configuration, but in the network of specific support dual stack node, needs to use and come distributing IP v4 address based on the DHCPv6 agreement.Fig. 1 is a dual stack network environment schematic diagram, as shown in Figure 1, in two stack job networks of supposing (not support tunnel style) at this, host A is a dual stack node, wish to obtain IPv6 address and IPv4 address as Dynamic Host Configuration Protocol server by router D (supporting two stacks), because the IPv6 limitation of network B, use DHCPv6 agreement distributing IP v6 address to realize, but can not come distributing IP v4 address by DHCPv4, at this moment, need utilize the interacting message of DHCPv6 agreement to come distributing IP v4 address.Among Fig. 1, router C can be configured to relay agent (RELAY), is used to realize communicating by letter between host A and the Dynamic Host Configuration Protocol server (router D).
In at present existing solution, allocation strategy based on the IPv4 address of DHCPv6 is to realize the distribution of IPv4 address and other information that need by increasing the new DHCPv6 option relevant with the IPv4 address, for example: domain name system (DNS, Domain Name System) option information, rental period information etc., these solutions have following deficiency:
At first, by practical application, need constantly to propose new option, as long as because relate to the support of IPv4 address, just having implied needs to support all options in the DHCPv4 agreement, method by each expansion DHCPv6 option code realizes the needs of heterogeneous networks to the function realization of IPv4 address, and it is comprehensive, unified to realize on the whole that function information issues.
Secondly, constantly increase option code and carry IPv4 address relevant information, must increase the complexity on the protocol processes, bring the loaded down with trivial details redundancy in the use.
Summary of the invention
In view of this, it is a kind of based on DHCPv6 protocol of I Pv4 address distribution method and system that main purpose of the present invention is to provide, by newly-increased DHCPv4 messages option, and unified being packaged in the DHCPv4 message, complete function, the unification of DHCPv6 agreement distributing IP v4 address have been realized under the IPv4/IPv6 dual stack environment; Can make Network adaptation more flexibly, protocol processes is simple, be easier to operation, safeguard.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of based on DHCPv6 protocol of I Pv4 address distribution method, set up DHCP internet protocol version four (DHCPv4) messages option, be used to carry DHCPv4 message; Configuration of IP v6/IPv4 address on the DHCPv6 server; Described method comprises:
DHCPv6 client and described DHCPv6 server are undertaken alternately by the message that carries the DHCPv4 messages option, realize the IPv4 address assignment.
Further, described DHCPv6 client makes up DHCPv4Discover message, with the content of this DHCPv4Discover message as the DHCPv4 messages option, generates Solicit message, and sends to described DHCPv6 server, application IPv4 address.
Further, when being provided with relaying RELAY between described DHCPv6 client and the described DHCPv6 server, described Solicit message sends to described DHCPv6 server by described RELAY; Described method also comprises:
After described RELAY receives Solicit message, resolve the DHCPv4 messages option,, the content of DHCPv4 messages option is resolved, encapsulated again, make up the Relay-forw information and sending and give described DHCPv6 server according to IPv4 address process strategy; Wherein, described Relay-forw message will DHCPv4Discover message as the DHCPv4 messages option;
Described DHCPv6 server is according to the DHCPv4 messages option, and distributing IP v4 address and transmission are carried the message of DHCPv4 messages option to described RELAY;
Described RELAY resolves the DHCPv4 messages option after receiving the message of described DHCPv6 server answer, according to IPv4 address process strategy, the content of DHCPv4 messages option is resolved, is encapsulated again, sends to described DHCPv6 client.
Further, when being provided with relaying RELAY between described DHCPv6 client and the described DHCPv6 server, when described RELAY does not support the IPv4 address assignment, after described RELAY receives Solicit message, with the deletion of DHCPv4 messages option, make up the Relay-forw information and sending again and give described DHCPv6 server.
Further, when not being provided with RELAY between described DHCPv6 client and the described DHCPv6 server, the direct treatment S olicit message of described DHCPv6 server, and according to the DHCPv4 messages option in the described Solicit message, distributing IP v4 address and transmission are carried the message of DHCPv4 messages option to described DHCPv6 client.
Further, described method also comprises:
Behind the message that carries the DHCPv4 messages option of described DHCPv6 client according to the described DHCPv6 server transmission that receives, according to the DHCPv4 messages option, make up DHCPv4Request message, be encapsulated in the DHCPv4 messages option, make up the DHCPv6Request information and sending and give described DHCPv6 server.
Further, be provided with relaying RELAY between described DHCPv6 client and the described DHCPv6 server, after described DHCPv6 client sends DHCPv6Request message,
Described RELAY makes up and sends Relay-forw (DHCPv6Request) message and gives described DHCPv6 server, after described DHCPv6 server receives Relay-forw (DHCPv6Request) message, according to the DHCPv4 messages option, structure DHCPv4 response message also is encapsulated in the DHCPv4 messages option, makes up Relay-repl (Reply) information and sending and gives described DHCPv6 client.
A kind of based on DHCPv6 protocol of I Pv4 address allocation system, comprising: DHCPv6 client, DHCPv6 server, it is characterized in that, set up the DHCPv4 messages option, be used to carry DHCPv4 message; Configuration of IP v6/IPv4 address on described DHCPv6 server;
The DHCPv6 client is used for carrying out finishing the IPv4 address assignment alternately with described DHCPv6 server by carrying the message of DHCPv4 messages option.
Further, described DHCPv6 client is further used for, and makes up DHCPv4Discover message, with the content of this DHCPv4Discover message as the DHCPv4 messages option, generate Solicit message, and send to described DHCPv6 server, application IPv4 address.
Further, described system also comprises the relaying RELAY that is located between described DHCPv6 client and the described DHCPv6 server;
Described DHCPv6 client is further used for described Solicit message is sent to described DHCPv6 server by described RELAY;
Described RELAY, after being used to receive Solicit message, further resolve the DHCPv4 messages option, according to IPv4 address process strategy, content to the DHCPv4 messages option is resolved, encapsulation again, makes up the Relay-forw information and sending and gives described DHCPv6 server; Wherein, described Relay-forw message will DHCPv4Discover message as the DHCPv4 messages option;
Described DHCPv6 server is used for the messages option according to DHCPv4, and distributing IP v4 address and transmission are carried the message of DHCPv4 messages option to described RELAY;
Described RELAY, after being further used for receiving the message of described DHCPv6 server answer, resolve the DHCPv4 messages option, according to IPv4 address process strategy, content to the DHCPv4 messages option is resolved, encapsulation again, sends to described DHCPv6 client;
Described DHCPv6 client, behind the message that carries the DHCPv4 messages option that is further used for sending according to the described DHCPv6 server that receives, according to the DHCPv4 messages option, make up DHCPv4Request message, be encapsulated in the DHCPv4 messages option, make up the DHCPv6Request information and sending and give described DHCPv6 server.
Further, when being provided with relaying RELAY between described DHCPv6 client and the described DHCPv6 server,
When described RELAY did not support the IPv4 address assignment, described RELAY was further used for after receiving Solicit message, with the deletion of DHCPv4 messages option, made up the Relay-forw information and sending again and gave described DHCPv6 server.
Further, be provided with relaying RELAY between described DHCPv6 client and the described DHCPv6 server, after described DHCPv6 client sends DHCPv6Request message,
Described RELAY makes up and sends Relay-forw (DHCPv6Request) message and gives described DHCPv6 server;
Described DHCPv6 server, be further used for after receiving Relay-forw (DHCPv6Request) message, further according to the DHCPv4 messages option, structure DHCPv4 response message also is encapsulated in the DHCPv4 messages option, makes up Relay-repl (Reply) information and sending and gives described DHCPv6 client.
Further, when not being provided with RELAY between described DHCPv6 client and the described DHCPv6 server, described DHCPv6 server, be further used for direct treatment S olicit message, and according to the DHCPv4 messages option in the described Solicit message, distributing IP v4 address and transmission are carried the message of DHCPv4 messages option to described DHCPv6 client;
Described DHCPv6 client, behind the message that carries the DHCPv4 messages option that is further used for sending according to the described DHCPv6 server that receives, according to the DHCPv4 messages option, make up DHCPv4Request message, be encapsulated in the DHCPv4 messages option, make up the DHCPv6Request information and sending and give described DHCPv6 server.
The present invention has set up a DHCPv6 option: DHCPv4Message Option, this option is used to carry whole DHCPv4 message content, realized the unified encapsulation that the IPv4 address is relevant, directly use original DHCPv4 protocol stack realization mechanism when it is operated, promptly be unified in the IPv6 network, be independent of the processing of the agreement of DHCPv4 again, make Network adaptation more flexible, convenient in actual applications, quick, realized complete function, unification.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Fig. 1 is a dual stack network environment schematic diagram;
Fig. 2 is DHCPv6 option-DHCPv4Message Option format chart that the present invention increases newly;
Fig. 3 is the IPv4 address assignment protocol interaction figure of DHCPv6 under the relaying environment that the present invention relates to;
Fig. 4 is the IPv4 address assignment protocol interaction figure of DHCPv6 under the direct-connected environment that the present invention relates to;
Fig. 5 is the application networking diagram of DHCPv6 distributing IP v4 of the present invention address.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
At first illustrate the basic technical scheme of the embodiment of the invention, as follows:
The first, increase an option: the DHCPv4 messages option is DHCPv4Message Option, and this DHCPv4 messages option is specifically designed to carries DHCPv4 message; In the address pool collocation strategy, support configuration of IPv6 address pool and IPv4 address pool and distribution simultaneously on the DHCPv6 server.
Second, when the DHCPv6 client is obtained the IPv4 address, make up DHCPv4Discover message, with the content of this message as the DHCPv4Message option, expression application IPv4 address, and, realize submitting to fast function herein if desired based on above-mentioned DHCPv4Message Option structure Solicit message, then need two kinds of message all to carry quick submission option, unified to realize.
The 3rd, if need the message of RELAY (relay agent) relaying client, processing policy according to RELAY, under the situation of supporting the IPv4 address allocation policy, resolve the DHCPv4Message option, according to IPv4 address assignment relevant treatment strategy, content to the DHCPv4 messages option, resolve, encapsulate again (such as inserting some option) message, if do not support the IPv4 address assignment, then RELAY deletes this option from message, does not meet the IPv4 address of network environment to have avoided the DHCPv6 server-assignment, and RELAY makes up and also sends Relay-forw message.
DHCPv6 server process Relay-forw (Solicit) message, according to the DHCPv4Message option, carry out respective handling, distribute the address success, (have only and in Relay-forw message and DHCPv4Discover message, all comprised quick submission option according to whether comprising quick submission option, just handle) according to quick submission, make up DHCPv4Offer message, be encapsulated in the DHCPv4Message option, do not support IPv4 address assignment or support at server but under the unsuccessful situation of distributing IP v4 The address Policy, be left intact.According to IPv6 address assignment result, carry its relevant information, make up Relay-repl (Advertise) message.
If no RELAY relaying, the direct treatment S olicit message of DHCPv6 server then, according to the DHCPv4Message option, carry out respective handling, distribute the address success, (have only and all to have comprised quick submission option according to whether comprising quick submission option, just handle according to quick submission), make up DHCPv4Offer message, be encapsulated in the DHCPv4Message option, do not support IPv4 address assignment or support at server but under the unsuccessful situation of distributing IP v4 The address Policy, be left intact.According to IPv6 address assignment result, carry its relevant information, make up Advertise message.
The 4th, DHCPv6 client process Advertise message according to whether having effective DHCPv4Message option and other relevant selection strategies, is selected suitable DHCPv6 server.Resolve IPv4, the relevant option in IPv6 address, according to the DHCPv4Message option, dissection process, structure DHCPv4Request message are encapsulated in the DHCPv4Message option, carry other information such as IPv6 address, make up DHCPv6Request message.
The 5th, if the RELAY relaying is arranged, then the processing policy of RELAY is consistent with the front; After the DHCPv6 server is received Relay-forw (Request) message, if support the IPv4 address assignment, then according to DHCPv4 protocol processes result, make up DHCPv4 response message (Ack or Nak message), be encapsulated in the DHCPv4Message option, otherwise, do not process (not encapsulating DHCPv4 message).According to IPv6 address assignment result, carry its relevant information, make up Relay-repl (Reply) message and send.
If no RELAY relaying, after the DHCPv6 server is received Request message, if support the IPv4 address assignment, then according to DHCPv4 protocol processes result, make up DHCPv4 response message (Ack or Nak message), be encapsulated in the DHCPv4Message option, otherwise, do not process (not encapsulating DHCPv4 message).According to IPv6 address assignment result, carry its relevant information, make up Reply message and send.
The 6th, after the DHCPv6 client is received Reply message,, carry out respective handling according to the DHCPv4 message in the DHCPv4Message option, as follows in detail:
7-1:, then initiate to obtain IPv4 address process again if DHCPv4Message option encapsulation is Nak message or this option not.
7-2: if the encapsulation of DHCPv4Message option is Ack message, obtain the IPv4 address that DHCPv6Server assigns, carry out gratuitous ARP (Address Resolution Protocol, address resolution protocol) detects, if there is not conflict, promptly preserve this address relevant information, bring into use this address; If there is conflict, then make up DHCPv4Declien message and be encapsulated in the DHCPv4Message option, send DHCPv6Decline message and refuse this address.
If the DHCPv6 client wishes to continue to use this address, need to initiate to re-rent request, extend a charter the time, make up DHCPv4Request and re-rent message, be encapsulated in the DHCPv4Message option, send DHCPv6Renew message.Do not respond if re-rent message, then reach certain hour and need send heavy bind-request message, make up the heavy binding message of DHCPv4Request, be encapsulated in the DHCPv4Message option, send DHCPv6Rebind message.This moment, the Message Processing detailed rules and regulations were as follows:
8-1: if only carry out the operation of IPv4 address, then carry relevant DHCPv6 client, DHCPv6 server identification, and the DHCPv4Message option information;
8-2: if carry out the operation of IPv4 and IPv6 address simultaneously, then carry DHCPv6 client, DHCPv6 server identification simultaneously, and information such as DHCPv4Message option and IPv6 address option;
8-3: if only carry out the operation of IPv6 address, then according to former DHCPv6 protocol processes.
If the DHCPv6 client does not re-use this address, should use Release message to discharge this address, make up the DHCPv4Release release message, be encapsulated in the DHCPv4Message option, send Release message, be beneficial to the repeated use of IPv4 address.
Among the present invention, DHCPv6 relaying, DHCPv6 server process Renew and Rebind message, distinguish the corresponding message processing of whether carrying out the IPv4 address according to whether comprising the DHCPv4Message option in the message, if do not comprise, then only carry out the operation of IPv6 address, make up Reply message, concrete detailed rules and regulations are as follows:
10-1: if be the operation of IPv4 address only,, then make up DHCPv4Ack message if handle successfully, otherwise, make up DHCPv4Nak message, be encapsulated in the DHCPv4Message option, and carry necessary identification information;
10-2: if the operation of IPv4 and IPv6 address, then the IPv4 processing is the same, adds necessary conditional code in the IPv6 address process.
DHCPv6 relaying, DHCPv6 server process Release and Declien message, distinguish the corresponding message processing of whether carrying out the IPv4 address according to whether comprising the DHCPv4Message option in the message, if do not comprise, then only carry out the operation of IPv6 address, concrete detailed rules and regulations are as follows:
11-1: if be the operation of IPv4 address only, the back that disposes sends Reply message or Relay-repl message;
11-2: if the operation of IPv4 and IPv6 address, according to the operation to the IPv6 address, the back that disposes sends Reply message or Relay-repl message.
When client only need be when server obtains the network configuration information of being correlated with the IPv4 address, make up DHCPv4Inform message, be encapsulated in the DHCPv4Message message, if need the corresponding operating of IPv6 address, then carry relevant information, make up Information-request message.
Server is when handling Relay-forw or Information-request message, handle respectively according to whether comprising the DHCPv4Message option, if after the success of IPv4 address process, make up DHCPv4Ack message and be encapsulated in the DHCPv4Message option, otherwise abandon.Carry IPv6 address relevant information, make up Reply message;
The DHCPv6 server need initiatively reclaim this address when the rental period arrives, to guarantee the recycling of IPv4 address.
By step as above, can finish distribution, use, the removal process of DHCPv6 protocol of I Pv4 address.
Fig. 2 is DHCPv6 option-DHCPv4Message Option format chart that the present invention increases newly, and as shown in Figure 2, DHCPv6 option-DHCPv4Message Option comprises: option type (sign is carried the ID of DHCPv4 message, takies 2 bytes); Option (message-length of DHCPv4 accounts for 2 bytes); The option type of this option is undetermined, and length is the total length of whole DHCPv4 message, and the support of this option requires to embed in the DHCPv6 protocol processes DHCPv4 protocol processes.
Fig. 5 is the application networking diagram of DHCPv6 distributing IP v4 of the present invention address, as shown in Figure 5, the DHCPv6 client is that DHCPv6Client (DHCPv6 client) uses the PC of supporting IPv4, IPv6 dual stack, and can passing through DHCPv6RELAY trunking (router C), DHCPv6Client links to each other with the DHCPv6 server (router D) of network far-end, also can be direct-connected with DHCPv6 server (router E), this RELAY trunking and DHCPv6 server are all handled the DHCPv4 messages option.Among the present invention based on DHCPv6 protocol of I Pv4 address allocation system, promptly be based on the described mechanism of Fig. 5 and realize, wherein, in the present invention is based on DHCPv6 protocol of I Pv4 address allocation system, the function that each above-mentioned network element is realized is different.The function that it will be appreciated by those skilled in the art that said network element can be understood by idiographic flow aforementioned and hereinafter, and the function that repeats no more each network element here realizes details.Need to prove, annexation between these network elements is flexibly, as connecting, also can connect, as long as can realize message transmission involved in the present invention by corresponding network such as the Internet, local area network (LAN), metropolitan area network etc. by wired or wireless mode.
Fig. 3 is the IPv4 address assignment protocol interaction figure of DHCPv6 under the direct-connected environment that the present invention relates to, and as shown in Figure 3, the IPv4 address assignment protocol interaction detailed process of DHCPv6 may further comprise the steps under the direct-connected environment of the present invention:
In the address pool collocation strategy, support the configuration of IPv6 address pool and IPv4 address pool simultaneously on the S301:DHCPv6 server.
S302: according to keeper's configuration, the DHCPv6 client need be applied for the IPv4 address, makes up Discover message, is encapsulated in the DHCPv4Message option, sends in the Solicit message and comes location-server.
The S303:DHCPv6 server is received Solicit message, finds to carry the DHCPv4Message option, according to DHCPv4 protocol processes and current allocation strategy:
S303-1: if support the IPv4 address assignment, resolve the DHCPv4Messag option,, make up DHCPv4 Offer message and encapsulate or be left intact according to DHCPv4 protocol processes result;
S303-2: if do not support the IPv4 address assignment to ignore this option and in message, delete.Carry IPv6 address relevant information simultaneously, make up Relay message and send to the DHCPv6 client.
S304: client receives Advertise message, according to whether carrying the DHCPv4Message option, therefrom select the DHCPv6 server meet the demands, resolve the DHCPv4Message option, obtain the IPv4 address, make up DHCPv4Request message, be encapsulated in the Request message, send to the DHCPv6 server.
The S305:DHCPv6 server receives Request message, resolves the DHCPv4 messages option, distributes the address success, makes up DHCPv4Ack message; Otherwise, make up DHCPv4Nak message or do not handle.Make up and send Reply message.
The S306:DHCPv6 client is resolved Reply message, parses information such as IPv4 address and rental period, initiates the ARP request, and whether available, if the address can be used, then write down the time in rental period if detecting the address, begins configuration and uses this IPv4 address;
S307: if the DHCPv6 client wishes to continue to use this address, under certain hour, initiate to re-rent request, extend a charter the time, make up DHCPv4Request and re-rent message, be encapsulated in the DHCPv4Message option, make up and send Renew message.Do not respond if re-rent message, then reach certain hour and send heavy bind-request message, make up the heavy binding message of DHCPv4Request, be encapsulated in the DHCPv4Message option, send Rebind message, wherein:
S307-1:, do not carry the DHCPv4Message option iff the processing that is the IPv6 address;
S307-2: iff the processing that is the IPv4 address, only carry the DHCPv4Message option, do not carry IPv6 address option IA option;
DHCPv4Message option and IPv6 address option IA option are carried in the processing of S307-3:IPv4 and IPv6 address simultaneously;
The S308:DHCPv6 server needs to resolve DHCPv4Message option in this message after receiving Renew, Rebind message, according to DHCPv4 protocol processes result, structure DHCPv4Ack or DHCPv4Nak message are encapsulated in the DHCPv4Message option or ignore this option, together with IPv6 address relevant information, send Reply message, wherein:
S308-1:, only handle relevant with the IPv4 address iff carrying the DHCPv4Message option;
S308-2:, only handle relevant with the IPv6 address if do not carry the DHCPv4Message option;
S308-3: carry DHCPv4Message option and IPv6 address option IA option simultaneously, process IP v4 is relevant with the IPv6 address.
The S309:DHCPv6 client is received Reply message, upgrades the information such as rental period of IPv4 address, and expression is re-rented or heavily bound successfully, brings into use this address.
The S310:DHCPv6 client is not if re-use this address, then make up DHCPv4Release message, be encapsulated in the DHCPv4 messages option, send Release message and discharge this address to the DHCPv6 server, and after the DHCPv6 server receives message, also can reclaim this address, in order to using next time, wherein:
S310-1:, do not carry the DHCPv4Message option iff the processing that is the IPv6 address;
S310-2: iff the processing that is the IPv4 address, only carry the DHCPv4Message option, do not carry IPv6 address option IA option;
DHCPv4Message option and IPv6 address option IA option are carried in the processing of S310-3:IPv4 and IPv6 address simultaneously;
The S311:DHCPv6 server needs to resolve the DHCPv4Message option after receiving DHCPv6Release message, according to the DHCPv4 protocol processes, discharge the IPv4 related resource, do not need to carry DHCPv4Message message, carry IPv6 address relevant information, make up the Reply information and sending, wherein:
S311-1:, only handle relevant with the IPv4 address iff carrying the DHCPv4Message option;
S311-2:, only handle relevant with the IPv6 address if do not carry the DHCPv4Message option;
S311-3: carry DHCPv4Message option and IPv6 address option IA option simultaneously, process IP v4 is relevant with the IPv6 address.
After the S312:DHCPv6 client is received the response Reply message of Release message, deletion IPv6 relevant information.
S313: if address conflict needs to make up DHCPv4Declien message and is encapsulated in the DHCPv4 messages option, and sends DHCPv6Declien message, wherein:
S313-1:, do not carry the DHCPv4Message option iff the processing that is the IPv6 address;
S313-2: iff the processing that is the IPv4 address, only carry the DHCPv4Message option, do not carry IPv6 address option IA option;
DHCPv4Message option and IPv6 address option IA option are carried in the processing of S313-3:IPv4 and IPv6 address simultaneously;
The S314:DHCPv6 server needs to resolve the DHCPv4Message option after receiving DHCPv6Decline message, according to the DHCPv4 protocol processes, process IP v4 related resource, do not need to carry DHCPv4Message message, carry IPv6 address relevant information, make up the Reply information and sending, wherein:
S314-1:, only handle relevant with the IPv4 address iff carrying the DHCPv4Message option;
S314-2:, only handle relevant with the IPv6 address if do not carry the DHCPv4Message option;
S314-3: carry DHCPv4Message option and IPv6 address option IA option simultaneously, process IP v4 is relevant with the IPv6 address.
After the S315:DHCPv6 client is received the response Reply message of Decline message, process IP v6 relevant information.
S316: when client need be obtained some network configuration information, need carry out message request and handle,, then make up DHCPv4Inform message, be encapsulated in the DHCPv4Message message if will carry out the operation of IPv4 address; If need the corresponding operating of IPv6 address, then carry relevant information, make up Information-request message, wherein:
S316-1:, do not carry the DHCPv4Message option iff the processing that is the IPv6 address;
S316-2: iff the processing that is the IPv4 address, only carry the DHCPv4Message option, do not carry IPv6 address option IA option;
DHCPv4Message option and IPv6 address option IA option are carried in the processing of S316-3:IPv4 and IPv6 address simultaneously;
S317:DHCPv6 server process Information-request message, handle respectively according to whether comprising the DHCPv4Message option, if after the success of IPv4 address process, make up DHCPv4Ack message and be encapsulated in the DHCPv4Message option, otherwise abandon.Carry IPv6 address relevant information, make up Reply message, wherein:
S317-1:, only handle relevant with the IPv4 address iff carrying the DHCPv4Message option;
S317-2:, only handle relevant with the IPv6 address if do not carry the DHCPv4Message option;
S317-3: carry DHCPv4Message option and IPv6 address option IA option simultaneously, process IP v4 is relevant with the IPv6 address.
After the S318:DHCPv6 client is received the response Reply message of Information-Request message, resolve and preserve the address relevant information.
Fig. 4 is the IPv4 address assignment protocol interaction figure of DHCPv6 under the relaying environment that the present invention relates to, and as shown in Figure 4, the IPv4 address assignment protocol interaction flow process of DHCPv6 specifically may further comprise the steps under the relaying environment of the present invention:
In the address pool collocation strategy, support the configuration of IPv6 address pool and IPv4 address pool simultaneously on the S401:DHCPv6 server.
S402: at first according to keeper's configuration, client is then created DHCPv4Discover message if need obtain the IPv4 address, be encapsulated in the DHCPv4Message option, if need obtain the IPv6 address, then carry relevant information, send in the Solicit message and come location-server.
The S403:DHCPv6 relaying is after the RELAY relaying receives Solicit message, according to collocation strategy, following selection is arranged:
S403-1: if support the IPv4 address assignment, then resolve message and have the DHCPv4Message option, make up DHCPv4Discover message and encapsulation again according to DHCPv4 protocol processes result;
S403-2: do not support then will ignore this option and in message, delete.
Make up Relay-forw message, be forwarded to the DHCPv6 server.
The S404:DHCPv6 server is received Relay-forw (Solicit) message, according to collocation strategy, following selection is arranged:
S404-1: if support the IPv4 address assignment, resolve the DHCPv4Messag option,, make up DHCPv4 Offer message and encapsulate or be left intact according to DHCPv4 protocol processes result;
S404-2: if do not support the IPv4 address assignment to ignore this option and in message, delete.Carry IPv6 address relevant information simultaneously, make up Relay-repl message and send to the RELAY relaying.
The S405:RELAY relaying is received Relay-repl message, parse the DHCPv4Message option in the Advertise message, according to DHCPv4 protocol processes result, encapsulate DHCPv4 Offer message or ignore this option, make up Advertise message and issue client.
The S406:DHCPv6 client receives Advertise message, according to whether comprising the DHCPv4Message option, therefrom select the DHCPv6 server meet the demands, resolve this option, obtain IPv4 address and IPv6 address, make up DHCPv4Request message and encapsulation, make up Request message, send to the RELAY relaying.
DHCPv4Request message is resolved, encapsulated to the message that S407:RELAY relaying client sends, processing policy with Solicit message, and make up Relay-forw message to server.
The S408:DHCPv6 server receives Relay-forw (Request) message, processing policy is with Discover message, resolve the DHCPv4Message option, make up DHCPv4Reply message and encapsulation, carry IPv6 address relevant information, make up Relay-repl message, send Relay-repl message to the RELAY relaying.
The message that the S409:RELAY Relay Server is sent is carried out relevant treatment to the DHCPv4Message option, gives client with the Reply forwards.
The S410:DHCPv6 client is resolved Reply message, parses information such as IPv4 address and rental period, initiates the ARP request, and whether available, if the address can be used, then write down the time in rental period if detecting the address, begins configuration and uses this IPv4 address.
S411: if the DHCPv6 client wishes to continue to use this address, under certain hour, initiate to re-rent request, extend a charter the time, make up DHCPv4Request and re-rent message, be encapsulated in the DHCPv4Message option, make up and send Renew message.Do not respond if re-rent message, then reach certain hour and send heavy bind-request message, make up the heavy binding message of DHCPv4Request, be encapsulated in the DHCPv4Message option, send Rebind message, wherein:
S411-1:, do not carry the DHCPv4Message option iff the processing that is the IPv6 address;
S411-2: iff the processing that is the IPv4 address, only carry the DHCPv4Message option, do not carry IPv6 address option IA option;
DHCPv4Message option and IPv6 address option IA option are carried in the processing of S411-3:IPv4 and IPv6 address simultaneously;
The S412:RELAY relaying needs to resolve DHCPv4Message option in this message after receiving Renew/Rebind message, make up Relay-forw message, issues server.
The S413:DHCPv6 server receives Relay-forw (Renew/Rebind) message need resolve DHCPv4Message option in this message, makes up Relay-repl message, issues the RELAY relaying, wherein:
S413-1:, only handle relevant with the IPv4 address iff carrying the DHCPv4Message option;
S413-2:, only handle relevant with the IPv6 address if do not carry the DHCPv4Message option;
S413-3: carry DHCPv4Message option and IPv6 address option IA option simultaneously, process IP v4 is relevant with the IPv6 address.
The S414:RELAY relaying upgrades information such as rental period in the Relay-repl message of receiving that server is sent, makes up DHCPv4Reply message, is encapsulated in the DHCPv4Message option, carries IPv6 address relevant information, sends Reply message to client, wherein:
S414-1:, only handle relevant with the IPv4 address iff carrying the DHCPv4Message option;
S414-2:, only handle relevant with the IPv6 address if do not carry the DHCPv4Message option;
S414-3: carry DHCPv4Message option and IPv6 address option IA option simultaneously, process IP v4 is relevant with the IPv6 address.
The S415:DHCPv6 client is received and is resolved Reply message, resolves the DHCPv4Message option, upgrades information such as IPv4 address and rental period, and the DHCPv6 relevant information.
The S416:DHCPv6 client is not if re-use this address, should delete this IPv4 relevant information, make up DHCPv4Release message simultaneously, be encapsulated in the DHCPv4 messages option, send Release message and discharge this address, and after the DHCPv6 server receives message, also can reclaim this address to the DHCPv6 server, in order to using next time, wherein:
S416-1:, do not carry the DHCPv4Message option iff the processing that is the IPv6 address;
S416-2: iff the processing that is the IPv4 address, only carry the DHCPv4Message option, do not carry IPv6 address option IA option;
DHCPv4Message option and IPv6 address option IA option are carried in the processing of S416-3:IPv4 and IPv6 address simultaneously;
The S417:RELAY relaying needs to resolve DHCPv4Message option in this message after receiving Release message, discharge this address, structure DHCPv4Release message, be encapsulated in the DHCPv4Message option, after it is handled, carry the IPv6 relevant information, make up Relay-forw message.
After the S418:DHCPv6 server receives that the Relay relaying is sent Relay-forw (Release), discharge the IPv4 address, do not carry the DHCPv4Message option, structure is the option relevant with the IPv6 address only, make up and send Relay-repl message to the RELAY relaying, wherein:
S418-1:, only handle relevant with the IPv4 address iff carrying the DHCPv4Message option;
S418-2:, only handle relevant with the IPv6 address if do not carry the DHCPv4Message option;
S418-3: carry DHCPv4Message option and IPv6 address option IA option simultaneously, process IP v4 is relevant with the IPv6 address.
The S419:RELAY relaying is being received Relay-repl message, resolves DHCPv4Message option in this message, and process IP v6 address relevant information sends DHCPv6Reply message to client.
After the S420:DHCPv6 client is received corresponding processing to Release message, discharge IPv6 address relevant information.
S421: if the DHCPv6 client is received address and the network address collision that parses, DHCPv4Declien message need be encapsulated in the DHCPv4Message option, make up Decline message., wherein:
S421-1:, do not carry the DHCPv4Message option iff the processing that is the IPv6 address;
S421-2: iff the processing that is the IPv4 address, only carry the DHCPv4Message option, do not carry IPv6 address option IA option;
DHCPv4Message option and IPv6 address option IA option are carried in the processing of S421-3:IPv4 and IPv6 address simultaneously;
The S422:RELAY relaying needs to resolve DHCPv4Message option in this message after receiving Decline message, discharge this address, structure DHCPv4Declien message, be encapsulated in the DHCPv4Message option, after it is handled, carry the IPv6 relevant information, make up Relay-forw message.
After the S423:DHCPv6 server receives that the Relay relaying is sent Relay-forw (Decline), the IPv4 address process is conflict, do not carry the DHCPv4Message option, structure is the option relevant with the IPv6 address only, makes up and send Relay-repl message to the RELAY relaying. wherein:
S423-1:, only handle relevant with the IPv4 address iff carrying the DHCPv4Message option;
S423-2:, only handle relevant with the IPv6 address if do not carry the DHCPv4Message option;
S423-3: carry DHCPv4Message option and IPv6 address option IA option simultaneously, process IP v4 is relevant with the IPv6 address.
The S424:RELAY relaying is being received Relay-repl message, resolves DHCPv4Message option in this message, and process IP v6 address relevant information sends DHCPv6Reply message to client.
After the S425:DHCPv6 client is received corresponding processing to Release message, process IP v6 address relevant information.
S426: when the DHCPv6 client need be obtained some network configuration information, need carry out message request handles, if will carry out the operation of IPv4 address, then make up DHCPv4 Inform message, be encapsulated in the DHCPv4Message message,, then carry relevant information if need the corresponding operating of IPv6 address, make up Information-request message, wherein:
S426-1:, do not carry the DHCPv4Message option iff the processing that is the IPv6 address;
S426-2: iff the processing that is the IPv4 address, only carry the DHCPv4Message option, do not carry IPv6 address option IA option;
DHCPv4Message option and IPv6 address option IA option are carried in the processing of S426-3:IPv4 and IPv6 address simultaneously;
The S427:RELAY relaying is received Information-request message, is packaged into Relay-forw message, sends to server.
S428:DHCPv6 server process Relay-forw (Information-request) message, handle respectively according to whether comprising the DHCPv4Message option, if after the success of IPv4 address process, make up DHCPv4Ack message and be encapsulated in the DHCPv4Message option, otherwise abandon.Carry IPv6 address relevant information, make up Relay-repl message, wherein:
S428-1:, only handle relevant with the IPv4 address iff carrying the DHCPv4Message option;
S428-2:, only handle relevant with the IPv6 address if do not carry the DHCPv4Message option;
S428-3: carry DHCPv4Message option and IPv6 address option IA option simultaneously, process IP v4 is relevant with the IPv6 address.
The S429:RELAY relaying is received Relay-forw message, makes up Reply message, sends to client.
The S430:DHCPv6 client is received the response message of Information-request message---after the Reply message, resolves and preserves the network of relation parameter information.
The present invention is by setting up a DHCPv6 option: DHCPv4Message Option (this option is used to carry whole DHCPv4 message content) has realized the unified encapsulation that the IPv4 address is relevant, when being operated, it directly uses original DHCPv4 protocol stack realization mechanism, promptly be unified in the IPv6 network, be independent of the processing of the agreement of DHCPv4 again, make Network adaptation more flexible, convenient in actual applications, quick, realized complete function, unification.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (13)
1. one kind based on DHCPv6 protocol of I Pv4 address distribution method, it is characterized in that, sets up DHCP internet protocol version four DHCPv4 messages option, is used to carry DHCPv4 message; Configuring internet protocol version six IPv6/ internet protocol versions four IPv4 addresses on the DHCPv6 server; Described method comprises:
DHCPv6 client and described DHCPv6 server are undertaken alternately by the message that carries the DHCPv4 messages option, realize the IPv4 address assignment.
2. method according to claim 1 is characterized in that, described DHCPv6 client makes up DHCPv4Discover message, with the content of this DHCPv4Discover message as the DHCPv4 messages option, generate Solicit message, and send to described DHCPv6 server, application IPv4 address.
3. method according to claim 1 is characterized in that, when being provided with relaying RELAY between described DHCPv6 client and the described DHCPv6 server, described Solicit message sends to described DHCPv6 server by described RELAY; Described method also comprises:
After described RELAY receives Solicit message, resolve the DHCPv4 messages option,, the content of DHCPv4 messages option is resolved, encapsulated again, make up the Relay-forw information and sending and give described DHCPv6 server according to IPv4 address process strategy; Wherein, described Relay-forw message will DHCPv4Discover message as the DHCPv4 messages option;
Described DHCPv6 server is according to the DHCPv4 messages option, and distributing IP v4 address and transmission are carried the message of DHCPv4 messages option to described RELAY;
Described RELAY resolves the DHCPv4 messages option after receiving the message of described DHCPv6 server answer, according to IPv4 address process strategy, the content of DHCPv4 messages option is resolved, is encapsulated again, sends to described DHCPv6 client.
4. method according to claim 1, it is characterized in that, when being provided with relaying RELAY between described DHCPv6 client and the described DHCPv6 server, when described RELAY does not support the IPv4 address assignment, after described RELAY receives Solicit message, with the deletion of DHCPv4 messages option, make up the Relay-forw information and sending again and give described DHCPv6 server.
5. method according to claim 1, it is characterized in that, when not being provided with RELAY between described DHCPv6 client and the described DHCPv6 server, the direct treatment S olicit message of described DHCPv6 server, and according to the DHCPv4 messages option in the described SoIicit message, distributing IP v4 address and transmission are carried the message of DHCPv4 messages option to described DHCPv6 client.
6. method according to claim 5 is characterized in that, described method also comprises:
Behind the message that carries the DHCPv4 messages option of described DHCPv6 client according to the described DHCPv6 server transmission that receives, according to the DHCPv4 messages option, make up DHCPv4Request message, be encapsulated in the DHCPv4 messages option, make up the DHCPv6Request information and sending and give described DHCPv6 server.
7. method according to claim 1 is characterized in that, is provided with relaying RELAY between described DHCPv6 client and the described DHCPv6 server, after described DHCPv6 client sends DHCPv6Request message,
Described RELAY makes up and sends Relay-forw (DHCPv6Request) message and gives described DHCPv6 server, after described DHCPv6 server receives Relay-forw (DHCPv6Request) message, according to the DHCPv4 messages option, structure DHCPv4 response message also is encapsulated in the DHCPv4 messages option, makes up Relay-repl (Reply) information and sending and gives described DHCPv6 client.
8. one kind based on DHCPv6 protocol of I Pv4 address allocation system, comprising: DHCPv6 client, DHCPv6 server, it is characterized in that, and set up the DHCPv4 messages option, be used to carry DHCPv4 message; Configuration of IP v6/IPv4 address on described DHCPv6 server;
The DHCPv6 client is used for carrying out finishing the IPv4 address assignment alternately with described DHCPv6 server by carrying the message of DHCPv4 messages option.
9. system according to claim 8, it is characterized in that, described DHCPv6 client is further used for, make up DHCPv4Discover message, with the content of this DHCPv4Discover message as the DHCPv4 messages option, generate Solicit message, and send to described DHCPv6 server, application IPv4 address.
10. system according to claim 8 is characterized in that, described system also comprises the relaying RELAY that is located between described DHCPv6 client and the described DHCPv6 server;
Described DHCPv6 client is further used for described Solicit message is sent to described DHCPv6 server by described RELAY;
Described RELAY, after being used to receive Solicit message, further resolve the DHCPv4 messages option, according to IPv4 address process strategy, content to the DHCPv4 messages option is resolved, encapsulation again, makes up the Relay-forw information and sending and gives described DHCPv6 server; Wherein, described Relay-forw message will DHCPv4Discover message as the DHCPv4 messages option;
Described DHCPv6 server is used for the messages option according to DHCPv4, and distributing IP v4 address and transmission are carried the message of DHCPv4 messages option to described RELAY;
Described RELAY, after being further used for receiving the message of described DHCPv6 server answer, resolve the DHCPv4 messages option, according to IPv4 address process strategy, content to the DHCPv4 messages option is resolved, encapsulation again, sends to described DHCPv6 client;
Described DHCPv6 client, behind the message that carries the DHCPv4 messages option that is further used for sending according to the described DHCPv6 server that receives, according to the DHCPv4 messages option, make up DHCPv4Request message, be encapsulated in the DHCPv4 messages option, make up the DHCPv6Request information and sending and give described DHCPv6 server.
11. system according to claim 8 is characterized in that, when being provided with relaying RELAY between described DHCPv6 client and the described DHCPv6 server,
When described RELAY did not support the IPv4 address assignment, described RELAY was further used for after receiving Solicit message, with the deletion of DHCPv4 messages option, made up the Relay-forw information and sending again and gave described DHCPv6 server.
12. system according to claim 8 is characterized in that,
Be provided with relaying RELAY between described DHCPv6 client and the described DHCPv6 server, after described DHCPv6 client sends DHCPv6Request message,
Described RELAY makes up and sends Relay-forw (DHCPv6Request) message and gives described DHCPv6 server;
Described DHCPv6 server, be further used for after receiving Relay-forw (DHCPv6Request) message, further according to the DHCPv4 messages option, structure DHCPv4 response message also is encapsulated in the DHCPv4 messages option, makes up Relay-repl (Reply) information and sending and gives described DHCPv6 client.
13. system according to claim 8, it is characterized in that, when not being provided with RELAY between described DHCPv6 client and the described DHCPv6 server, described DHCPv6 server, be further used for direct treatment S olicit message, and according to the DHCPv4 messages option in the described Solicit message, distributing IP v4 address and transmission are carried the message of DHCPv4 messages option to described DHCPv6 client;
Described DHCPv6 client, behind the message that carries the DHCPv4 messages option that is further used for sending according to the described DHCPv6 server that receives, according to the DHCPv4 messages option, make up DHCPv4Request message, be encapsulated in the DHCPv4 messages option, make up DHCPv6 Request information and sending and give described DHCPv6 server.
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| CN2010105812869A CN102014175A (en) | 2010-12-09 | 2010-12-09 | DHCPv6 protocol-based IPv4 address distribution method and system |
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| CN2010105812869A CN102014175A (en) | 2010-12-09 | 2010-12-09 | DHCPv6 protocol-based IPv4 address distribution method and system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038567A (en) * | 2014-06-12 | 2014-09-10 | 清华大学 | Method for real-timely obtaining 4 over 6 lease on the basis of lease fusion |
| CN110933190A (en) * | 2019-10-18 | 2020-03-27 | 平安科技（深圳）有限公司 | Client address obtaining method and device, storage medium and computer equipment |
| CN112804367A (en) * | 2019-11-14 | 2021-05-14 | 北京百度网讯科技有限公司 | Address allocation method and device under dual-stack environment |
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| CN101707637A (en) * | 2009-11-27 | 2010-05-12 | 中兴通讯股份有限公司 | Method and system for allocating IP address |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101707637A (en) * | 2009-11-27 | 2010-05-12 | 中兴通讯股份有限公司 | Method and system for allocating IP address |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038567A (en) * | 2014-06-12 | 2014-09-10 | 清华大学 | Method for real-timely obtaining 4 over 6 lease on the basis of lease fusion |
| CN110933190A (en) * | 2019-10-18 | 2020-03-27 | 平安科技（深圳）有限公司 | Client address obtaining method and device, storage medium and computer equipment |
| CN110933190B (en) * | 2019-10-18 | 2022-09-27 | 平安科技（深圳）有限公司 | Client address acquisition method and device, storage medium and computer equipment |
| CN112804367A (en) * | 2019-11-14 | 2021-05-14 | 北京百度网讯科技有限公司 | Address allocation method and device under dual-stack environment |
| CN112804367B (en) * | 2019-11-14 | 2023-04-07 | 北京百度网讯科技有限公司 | Address allocation method and device under dual-stack environment |
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Application publication date: 20110413 |