CN104519149A - Method for protecting important communication equipment by caching DHCPv6 rq options - Google Patents
Method for protecting important communication equipment by caching DHCPv6 rq options Download PDFInfo
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- CN104519149A CN104519149A CN201410818003.6A CN201410818003A CN104519149A CN 104519149 A CN104519149 A CN 104519149A CN 201410818003 A CN201410818003 A CN 201410818003A CN 104519149 A CN104519149 A CN 104519149A
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- dhcpv6
- options
- dhcpv6 client
- client
- buffer memory
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5076—Update or notification mechanisms, e.g. DynDNS
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Abstract
The invention provides a method for protecting important communication equipment by caching DHCPv6 rq options. The method comprises the following steps: creating a Daemon, wherein the Daemon, as an independent process, runs synchronously with a DHCPv6 Client; monitoring the state of the DHCPv6 Client through inter-process communications; caching rq options values carried in the offer information received by the DHCPv6 Client when the DHCPv6 Client is in a Bound state; starting a timer when the DHCPv6 Client is in a Selecting state, and if the DHCPv6 Client does not receive the offer information when the timer expires, using the cached rq options values to configure information for a system, so as to realize normal communications of the system. The method provided by the invention prevents users from suffering inconvenience and economic losses caused by communication interruption of the important communication equipment.
Description
Technical field
The present invention relates to a kind of method protecting important communication equipment, be specifically related to a kind of method being protected important communication equipment by buffer memory DHCPv6 rq options.
Background technology
Along with the development of Internet technology, IPv6 is relative to IPv4, and address is by 32 Bits Expanding to 128, and the length of the configuration informations such as corresponding route and DNS also increases considerably thereupon.And in real work, when especially lacking the personnel of professional technique, cannot manual configuration be carried out at all.Therefore, general by message such as DHCPv6 Client automatic acquisition IPv6 address, route and DNS, be automatically configured in system; Specifically, these message are that DHCPv6 Client asks to obtain to DHCPv6 Server by discover message, are present in the offer message received, and are presented with the form of TLV (Type, length, value).
DHCPv6 Client will ask lease information to DHCPv6 Server every 24 hours usually.In the discover message that DHCPv6 Client sends to DHCPv6 Server, carry the rq options that DHCPv6 Client is concerned about, as being concerned about routing iinformation, then with rq options, 3,33,121; If be concerned about sip proxy information, then carry rq options120; Corresponding NTP with DNS rq options has definition concrete separately in the RFC that DHCP is relevant.DHCPv6 Server is according to rq options corresponding in discover message, and return in offer message and be worth accordingly, its concrete message flow is see accompanying drawing 3.
But, when DHCPv6 Server transship or communication equipment to the communication link Down of DHCPv6 Server fall and arrive the link of other ISP normal time, DHCPv6 Client can not obtain Offer message, therefore, this communication equipment can not obtain as IPv6 address and route, cause this equipment not communicate normally.
Summary of the invention
For the problem of prior art, the present invention proposes a kind of method being protected important communication equipment by buffer memory DHCPv6 rq options, according to the different conditions of DHCPv6 Client, the rq options value entrained by offer information that buffer memory DHCPv6 Client receives; By the rq options value of buffer memory to system configuration IP address, the information such as route, make System recover communication function.The invention provides a kind of emergency communication mechanism, avoid the communication disruption of important communication equipment.
The object of the invention is to adopt following technical proposals to realize:
Protected a method for important communication equipment by buffer memory DHCPv6 rq options, described method comprises:
(1) Daemon is created;
(2) using described Daemon as an independently process, with DHCPv6 Client synchronous operation;
(3) by interprocess communication, the state of monitoring DHCPv6 Client;
(4) when DHCPv6 Client is in Bound state, rq options value entrained in the offer information that buffer memory DHCPv6 Client receives;
(5) when DHCPv6 Client is in Selecting state, start a timer, when the timer times out, still do not receive offer message, then by the rq options value of buffer memory to system configuration information, to realize system proper communication.
Wherein, the Offer information of described step (4) comprises IP address, routing iinformation and DNS information.
Preferably, when DHCPv6 Client can receive the Offer information that DHCPv6 Server sends, described DHCPv6Client is in Bound state.
Preferably, when DHCPv6 Client cannot obtain the Offer information that DHCPv6 Server sends, described DHCPv6Client rests on selecting state.
Preferably, described step (5) comprising: if exceed the scheduled time at described timer, DHCPv6 Client still rests on Selecting state, described Daemon is according to the rq options value of last time buffer memory under Bound state, to system configuration IP address and routing iinformation, and in routing iinformation, add the flag of DHCPv6 Client;
DHCPv6 Client enters Bound state after receiving the Offer information of described DHCPv6 Server configuration, and removes the routing iinformation with DHCPv6 flag, reconfigures route and IP address information according to the offer newly received.Further, the routing iinformation that injects for removing Daemon of described DHCPv6 Client flag.
With immediate prior art ratio, excellent effect of the present invention is:
When DHCPv6 Server cisco unity malfunction time, utilize the DHCPv6 rq options of buffer memory, to information such as the automatic configuration of IP address of system and routes, make System recover communication function.The puzzlement that the communication disruption avoiding important communication equipment is brought and economic loss.When DHCPv6 Server normally works time, Daemon is buffer memory rq options only, provides a kind of emergency communication mechanism.
This invention can revise any code of existing DHCPv6 Client, and Daemon is carried out work as an independent process with DHCPv6 Client, the heavy security mechanism that made important communication equipment many; In addition, the method also extends to the situation being obtained IPv4 address by DHCP.
Accompanying drawing explanation
Fig. 1 is the method flow diagram that buffer memory DHCPv6 rq options provided by the invention protects important communication equipment;
Fig. 2 is that communication equipment provided by the invention cannot the topological diagram of normal receipt message;
The DHCPv6 Client that Fig. 3 provides for background technology is with the communication scheme of DHCPv6 Server.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
As shown in Figure 1, a kind of method being protected important communication equipment by buffer memory DHCPv6 rq options, it is characterized in that, described method comprises:
(1) Daemon is created;
(2) using described Daemon as an independently process, with DHCPv6 Client synchronous operation;
(3) by interprocess communication, the state of monitoring DHCPv6 Client;
(4) when DHCPv6 Client is in Bound state, rq options value entrained in the offer information that buffer memory DHCPv6 Client receives;
Wherein, the out of Memory that the Offer information of described step (4) comprises IP address, routing iinformation and asks, as Sip Proxy etc.
When DHCPv6 Client can receive the Offer information that DHCPv6 Server sends, described DHCPv6 Client is in Bound state.
As shown in Figure 2, (5), when DHCPv6 Client is in Selecting state, start a timer, when the timer times out, when still not receiving offer, by the rq options value of buffer memory to system configuration information, to realize system proper communication.
When DHCPv6 Client cannot obtain the Offer information that DHCPv6 Server sends, described DHCPv6 Client rests on selecting state.
Described step (5) comprising: if DHCPv6 Client still rests on Selecting state within the scheduled time of described timer, described Daemon is according to the rq options value of last time buffer memory under Bound state, to information such as system configuration IP address and routes, and in routing iinformation, add the flag of DHCPv6 Client;
DHCPv6 Client enters Bound state after receiving the Offer information of described Daemon configuration, and removes the routing iinformation with DHCPv6 flag, reconfigures the information such as route and IP address according to the offer newly received.Wherein, the information setup parameter according to actual needs of each Equipments Setting, is generally divided into optional parameters and mandatory parameter.Mandatory parameter comprises IP address, subnet mask (rq options value is 1), routing iinformation (3,33,121) 3 are wherein, router routes, 33 is static routing table, and 121 is classless Static Route Option.Optional parameters is selected voluntarily according to the location of equipment, if equipment pays close attention to sip proxy, so in the discover message of request, carries 120, if equipment pays close attention to DNS Server, so in the Discover message of request, carries 119;
The routing iinformation that described DHCPv6 Client flag injects for removing Daemon.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; although with reference to above-described embodiment to invention has been detailed description; those of ordinary skill in the field still can modify to the specific embodiment of the present invention or equivalent replacement; and these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, it is all being applied within the claims of the present invention awaited the reply.
Claims (6)
1. protected a method for important communication equipment by buffer memory DHCPv6 rq options, it is characterized in that, described method comprises:
(1) Daemon is created;
(2) using described Daemon as an independently process, with DHCPv6 Client synchronous operation;
(3) by interprocess communication, the state of monitoring DHCPv6 Client;
(4) when DHCPv6 Client is in Bound state, rq options value entrained in the offer information that buffer memory DHCPv6 Client receives;
(5) when DHCPv6 Client is in Selecting state, start a timer, when the timer times out, still do not receive offer, then by the rq options value of buffer memory to system configuration information, to realize system proper communication.
2. a kind of method protecting important communication equipment by buffer memory DHCPv6 rq options as claimed in claim 1, it is characterized in that, the Offer information of described step (4) comprises IP address, routing iinformation.
3. a kind of method being protected important communication equipment by buffer memory DHCPv6 rq options as claimed in claim 1, when DHCPv6 Client can receive the Offer information that DHCPv6 Server sends, described DHCPv6 Client is in Bound state.
4. a kind of buffer memory DHCPv6 rq options of passing through protects the method for important communication equipment as claimed in claim 1; it is characterized in that; when DHCPv6 Client cannot obtain the Offer information that DHCPv6 Server sends, described DHCPv6 Client rests on selecting state.
5. a kind of buffer memory DHCPv6 rq options of passing through protects the method for important communication equipment as claimed in claim 1, it is characterized in that, described step (5) comprising: if DHCPv6 Client still rests on Selecting state within the scheduled time of described timer, described Daemon is according to the rq options value of last time buffer memory under Bound state, to system configuration IP address and routing iinformation, and in routing iinformation, add the flag of DHCPv6 Client;
DHCPv6 Client enters Bound state after receiving the Offer information of described DHCPv6 Server, and removes the routing iinformation with DHCPv6 flag, reconfigures route and IP address information according to the offer newly received.
6. a kind of method protecting important communication equipment by buffer memory DHCPv6 rq options as claimed in claim 5, is characterized in that, the routing iinformation that described DHCPv6 Client flag injects for removing Daemon.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410818003.6A CN104519149A (en) | 2014-12-24 | 2014-12-24 | Method for protecting important communication equipment by caching DHCPv6 rq options |
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| CN201410818003.6A CN104519149A (en) | 2014-12-24 | 2014-12-24 | Method for protecting important communication equipment by caching DHCPv6 rq options |
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| EP2503804A1 (en) * | 2011-03-21 | 2012-09-26 | Apple Inc. | Apparatus and method for managing peer-to-peer connections between different service providers |
| CN102710665A (en) * | 2012-06-27 | 2012-10-03 | 深圳中兴网信科技有限公司 | Mobile terminal, and data synchronization method of server and mobile terminal |
| CN103561122A (en) * | 2013-10-23 | 2014-02-05 | 华为终端有限公司 | IPv6 address collocation method, IPv6 client and server |
| CN103731394A (en) * | 2012-10-10 | 2014-04-16 | 中国移动通信集团公司 | Method and equipment for configuring IPv6 transitional technologies on CPE |
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2014
- 2014-12-24 CN CN201410818003.6A patent/CN104519149A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453705A (en) * | 2007-12-05 | 2009-06-10 | 北京邮电大学 | Off-line browsing system for news |
| CN101820387A (en) * | 2010-02-08 | 2010-09-01 | 北京航空航天大学 | Method for rapidly deploying extensible cluster |
| EP2503804A1 (en) * | 2011-03-21 | 2012-09-26 | Apple Inc. | Apparatus and method for managing peer-to-peer connections between different service providers |
| CN102710665A (en) * | 2012-06-27 | 2012-10-03 | 深圳中兴网信科技有限公司 | Mobile terminal, and data synchronization method of server and mobile terminal |
| CN103731394A (en) * | 2012-10-10 | 2014-04-16 | 中国移动通信集团公司 | Method and equipment for configuring IPv6 transitional technologies on CPE |
| CN103561122A (en) * | 2013-10-23 | 2014-02-05 | 华为终端有限公司 | IPv6 address collocation method, IPv6 client and server |
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Effective date of registration: 20160325 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: China Electric Power Research Institute Applicant after: State Grid Smart Grid Institute Applicant after: Jiangsu Electric Power Company Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: China Electric Power Research Institute Applicant before: Jiangsu Electric Power Company |
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Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: China Electric Power Research Institute Applicant after: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Applicant after: Jiangsu Electric Power Company Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: China Electric Power Research Institute Applicant before: State Grid Smart Grid Institute Applicant before: Jiangsu Electric Power Company |
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