CN106559509B - Registration server, CGN equipment, service provider system and index, retransmission method - Google Patents
Registration server, CGN equipment, service provider system and index, retransmission method Download PDFInfo
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- CN106559509B CN106559509B CN201510639277.3A CN201510639277A CN106559509B CN 106559509 B CN106559509 B CN 106559509B CN 201510639277 A CN201510639277 A CN 201510639277A CN 106559509 B CN106559509 B CN 106559509B
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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
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/2517—Translation of Internet protocol [IP] addresses using port numbers
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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
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/256—NAT traversal
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The present invention proposes a kind of registration server, CGN equipment, service provider system and index, retransmission method, is related to field of communication technology.Wherein, service indexing means of the invention include: that registration server receives the access request from requesting terminal, wherein, the service log that requesting terminal is shown according to registration server, service log include under corresponding CGN environment the internal address of service terminal and outer net address determine access request；According to the address of access request extraction requesting terminal, the outer net address of service terminal and port offset amount and it is sent to the corresponding CGN equipment of service terminal.By such method, it can show that the address information of service terminal is selected for requesting terminal to user, the address of requesting terminal, the outer net address of service terminal and port offset amount are sent to corresponding CGN equipment, corresponding reversed NAT session is generated for CGN equipment, so that the terminal user in CGN environment is externally provided service, realizes that the service under CGN environment is passed through.
Description
Technical field
The present invention relates to field of communication technology, especially a kind of registration server, CGN equipment, service provider system and rope
Draw, retransmission method.
Background technique
NAT (Network Address Translation, network address translation) technology is IPv4 to IPv6 transition period
Important technology.Currently, the NAT technology disposed in the operator network is normally based on port block to distribute address resource,
This technology for carrying out network address translation based on port block mode is properly termed as CGN (Carrier-Grade NAT, Working level
Network address translation) technology.In the environment of deploying CGN technology, how externally to be provided from the Internet access terminals user
Serve port is always an insoluble problem.Existing service acrossing schemes are by top level services system oneself realization, greatly
Majority is realized by corresponding to IP in one tracking server tracking intranet and extranet of outer wet end administration, and concrete methods of realizing is mutual
It is widely different, without versatility.
Summary of the invention
It is an object of the present invention to solve the problems, such as that the service under CGN environment is passed through.
According to an aspect of the present invention, a kind of registration server is proposed, comprising: service display module is used for user
Show that registered service log, service log include service terminal under corresponding working level network address conversion CGN environment
Internal address and outer net address；Request module, for the access request of acquisition request terminal, requesting terminal takes according to registration
The registered service log that business device is shown determines access request；Information extraction modules are requested for being extracted according to access request
The address of terminal, the outer net address of service terminal and port offset amount；Information sending module, for by the address of requesting terminal,
The outer net address and port offset amount of service terminal are sent to the corresponding CGN equipment of service terminal.
Further, further includes: Registration Module, the service registration for receiving the service terminal under CGN environment are asked
It asks, includes the internal address of service terminal in service registration request；Enquiry module, for being awarded according to service registration request from certification
Outer net address and port block message that charging aaa server obtains service terminal are weighed, shows service eventually to service display module
The internal address at end, outer net address.
Further, further includes: information storage module, internal address, outer net address and end for storage service terminal
Buccal mass information.
Further, information extraction modules are also used to the both port of origination of the port block according to the obtained distribution of corresponding with service terminal
It is worth and determines port offset amount.
It further, further include information revocation module, for cancelling display module exhibition in the case where service terminal is offline
The service log for the corresponding with service terminal shown.
Such registration server can show the service log of registered service terminal and confession under CGN environment to user
Requesting terminal selection, is sent to corresponding CGN for the address of requesting terminal, the outer net address of service terminal and port offset amount and sets
It is standby, corresponding reversed NAT session is generated for CGN equipment, the terminal user in CGN environment is enable externally to provide service, is realized
Service under CGN environment is passed through.
According to another aspect of the present invention, propose a kind of CGN equipment, comprising: information table generation module, for according to from
The address of requesting terminal, the outer net address of service terminal and the port offset amount that registration server obtains generate reversed nat port
Information table, reversed nat port information table include the address of requesting terminal, the outer net address of service terminal and port offset amount；Instead
To session generation module, for generating corresponding reversed NAT meeting based on port mapping algorithm according to reversed nat port information table
Words；Forwarding module, for corresponding under from the access request that requesting terminal obtains to CGN environment according to reversed NAT session forwarding
Service terminal.
Further, further includes: memory module, the reversed NAT session generated for storing reversed session generation module.
Further, further includes: searching module, for being looked into based on port mapping algorithm according to reversed nat port information table
Look for reversed NAT session.
Further, further includes: data maintenance module, for not having in predetermined ageing time newly in reversed NAT session
Access request in the case where, cancel reversed NAT session.
Further, data maintenance module is used to not receive the feelings of the access request from requesting terminal in the given time
Under condition, reversed NAT session is cancelled.
Further, data maintenance module is used in the case where service terminal is offline, cancels corresponding reversed nat port
Information table.
Such CGN equipment can be inclined according to the address of the requesting terminal of acquisition, the outer net address of service terminal and port
Shifting amount generates reversed nat port information table, and then generates reversed NAT session, keeps the terminal user in CGN environment external
Service is provided, realizes that the service under CGN environment is passed through.
According to a further aspect of the invention, a kind of service provider system is proposed, including any one being mentioned above
Registration server and any one CGN equipment and aaa server service eventually under CGN environment for providing to registration server
The outer net address and port block message at end.
In such service provider system, registration server can obtain the internal address of service terminal under CGN environment, outer
Net address and port block message, when requesting terminal is in the service of service terminal under registration server selects CGN environment, CGN is set
It is standby to generate corresponding reversed NAT session, so that the terminal user in CGN environment is externally provided service, realizes CGN environment
Under service pass through.
According to a further aspect of the invention, a kind of service indexing means are proposed, comprising: registration server is received to come from and be asked
Seek the access request of terminal, wherein the registered service log that requesting terminal is shown according to registration server determines that access is asked
It asks；According to the address of access request extraction requesting terminal, the outer net address of service terminal and port offset amount and it is sent to service
The corresponding CGN equipment of terminal.
Further, further includes: receive the service registration request of the service terminal under CGN environment, service registration is asked
It include the internal address of service terminal in asking；The outer net address of service terminal is obtained from aaa server according to service registration request
With port block message, so as to service display module show service terminal service log.
Further, further includes: the internal address of storage service terminal, outer net address and port block message.
Further, reversed nat port information table is generated according to access request further include: obtained according to corresponding with service terminal
The both port of origination value of the port block of distribution determines port offset amount.
Further, further includes: in the case where service terminal is offline, cancel the service note of the corresponding with service terminal of displaying
Record.
By such method, the service log of registered service terminal under CGN environment can be shown for asking to user
It asks terminal to select, the address of requesting terminal, the outer net address of service terminal and port offset amount is sent to corresponding CGN and set
It is standby, corresponding reversed NAT session is generated for CGN equipment, the terminal user in CGN environment is enable externally to provide service, is realized
Service under CGN environment is passed through.
In addition, according to an aspect of the present invention, proposing a kind of service retransmission method, comprising: CGN is according to from enrolled for service
The address of requesting terminal, the outer net address of service terminal and the port offset amount that device obtains generate reversed nat port information table, instead
It include the address of requesting terminal, the outer net address of service terminal and port offset amount to nat port information table；According to reversed NAT
Port information table generates corresponding reversed NAT session based on port mapping algorithm；Access request is forwarded according to reversed NAT session
Corresponding service terminal under to CGN environment.
Further, further includes: store the reversed NAT session of generation.
Further, further includes: port mapping algorithm is based on according to reversed nat port information table and searches reversed NAT session.
Further, further includes: if reversed NAT session does not have new access request in predetermined ageing time, cancel
Reversed NAT session.
Further, further includes: if not receiving the access request from requesting terminal in the given time, revocation is reversed
NAT session.
Further, further includes: if service terminal is offline, cancel corresponding reversed nat port information.
It by such method, can be according to the address of the requesting terminal of acquisition, the outer net address of service terminal and port
Offset generates reversed nat port information table, and then generates reversed NAT session, keeps the terminal user in CGN environment right
Outer offer service realizes that the service under CGN environment is passed through.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of one embodiment of registration server of the invention.
Fig. 2 is the schematic diagram of another embodiment of registration server of the invention.
Fig. 3 is the schematic diagram of one embodiment of CGN equipment of the invention.
Fig. 4 is the schematic diagram of another embodiment of CGN equipment of the invention.
Fig. 5 is the schematic diagram of one embodiment of service provider system of the invention.
Fig. 6 is the schematic diagram of another embodiment of service provider system of the invention.
Fig. 7 is the flow chart of one embodiment of service indexing means of the invention.
Fig. 8 is the flow chart of one embodiment of a part of service indexing means of the invention.
Fig. 9 is the flow chart of one embodiment of service retransmission method of the invention.
Specific embodiment
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
The schematic diagram of one embodiment of registration server of the invention is as shown in Figure 1.Wherein, 101 mould is shown for service
Block, when the terminal user under CGN environment needs to issue the service of oneself on the internet, terminal user can be in registration server
The wish of itself is registered, the service display module 101 of registration server can show registered service log, service to user
Record includes that the related information of the internal address and outer net address of the service terminal of service, user are provided under corresponding CGN environment
The content selection that can be shown according to service display module 101 provides the service terminal of service.102 be request module, when
When terminal user on internet needs to access the service that service terminal shown in service display module 101 provides, it can obtain
Take the access request for initiating the requesting terminal of access request.103 be information extraction modules, can be asked according to the access of requesting terminal
It asks, extracts the address of requesting terminal and the outer net address of service terminal and port offset amount.104 be information sending module, will
The address of requesting terminal, the outer net address of service terminal and port offset amount are sent to the corresponding CGN equipment of service terminal, supply
CGN equipment generates corresponding reversed NAT session.
Such registration server can show the service log of registered service terminal and confession under CGN environment to user
Requesting terminal selection, is sent to corresponding CGN for the address of requesting terminal, the outer net address of service terminal and port offset amount and sets
It is standby, corresponding reversed NAT session is generated for CGN equipment, the terminal user in CGN environment is enable externally to provide service, is realized
Service under CGN environment is passed through.
In one embodiment, registration server can also be for service terminal enrolled for service, to show on internet
Requesting terminal, for requesting terminal select.As shown in Figure 2, wherein 201~204 be respectively service display module, request
Module, information extraction modules and information sending module, it is similar to the function of counter structure in Fig. 1.205 be Registration Module, energy
Enough service registration requests for receiving the service terminal under CGN environment.It include the Intranet of service terminal in service registration request
Address information 206 is enquiry module, can be serviced according to obtaining from the service registration request that CGN equipment obtains from aaa server
The outer net address and port block message of terminal.The clothes that service display module 201 is obtained according to enquiry module 206 from aaa server
Requesting terminal displaying of the internal address, outer net address and port block message for terminal of being engaged in on internet, in one embodiment,
It can only show the internal address and outer net address of service terminal.
Such registration server can receive the service registration request of the service terminal under CGN environment, and from AAA
Server obtains internal address, outer net address and the port block message of corresponding with service terminal, selects for requesting terminal, makes CGN ring
Service terminal under border easily the user on internet can provide service.
It in one embodiment, further include information storage module, with 203 phase of enquiry module 206 and information extraction modules
Even, it is capable of the internal address, outer net address and port block message of storage service terminal, and is provided to information extraction modules 203
The internal address of service terminal, outer net address and port block message.
Such registration server is capable of the internal address, outer net address and port block message of storage service terminal, thus
Relevant information is rapidly found when obtaining service request and is provided to CGN equipment, and it is corresponding anti-to improve the generation of CGN equipment
To the efficiency of NAT session.
In one embodiment, information extraction modules can also be according to the both port of origination value of the port block message of service terminal
Determine the port offset amount for being sent to CGN equipment.Such registration server can provide port offset amount letter for CGN equipment
Breath facilitates CGN equipment to generate reversed nat port information table and generates reversed NAT session.
In one embodiment, registration server further includes information revocation module, the ground for showing when registration server
When the corresponding service terminal in location is offline, revocation shows the service log of corresponding service terminal.In one embodiment, information is removed
Selling module can be with the internal address for the corresponding with service terminal that revocation information memory module stores, outer net address and port block letter
Breath.Such registration server can safeguard at any time the service log of displaying, storage, thus avoid mistake to requesting terminal exhibition
The address information for showing service terminal guarantees the reliability of the information provided for requesting terminal.
The schematic diagram of one embodiment of CGN equipment of the invention is as shown in Figure 3.Wherein, 301 mould is generated for information table
Block, can be reversed according to generating from the address of requesting terminal that registration obtains, the outer net address of service terminal and port offset amount
Nat port information table.Reversed nat port information table includes that the address of requesting terminal, the outer net address of service terminal and port are inclined
Shifting amount, wherein CGN equipment utilization requesting terminal address, service terminal outer net Address Recognition from the message of requesting terminal, when
The source address of the message of acquisition is that the address of requesting terminal determines the access when destination address is the outer net address of service terminal
Corresponding reversed NAT session is requested, and the access request is handled according to port offset amount, according to port offset amount by destination port
Corresponding offset operation is carried out, to be transferred to corresponding service terminal.Port mapping algorithm should in positive NAT session
Port mapping algorithm is identical, to realize correct port mapping.CGN equipment can be searched according to reversed nat port information table
Or generate corresponding reversed NAT session.302 be reversed session generation module, can be based on according to reversed nat port information table
Port mapping algorithm generates reversed NAT session.303 be forwarding module, can be forwarded according to reversed NAT session from requesting terminal and be obtained
Corresponding service terminal under the access request taken to CGN environment.
Such CGN equipment can be inclined according to the address of the requesting terminal of acquisition, the outer net address of service terminal and port
Shifting amount generates reversed nat port information table, and then generates reversed NAT session, is forwarded access request according to reversed NAT session
To corresponding service terminal, the terminal user in CGN environment is enable externally to provide service, realizes that the service under CGN environment is worn
More.
In one embodiment, as shown in Figure 4, wherein 401~403 be respectively information table generation module, reversed session life
At module and forwarding module, function is similar to the counter structure in Fig. 3.CGN equipment can also include memory module 404,
The reversed NAT session that reversed session generation module 404 generates can be stored.In one embodiment, when service terminal passes through CGN
When equipment actively is initiated to service to outer net, CGN equipment steps on the service such as HASH algorithm according to scheduled port mapping algorithm
The other end that note request is converted within the scope of the corresponding port block of service terminal, the source IP address of service registration request is converted into
Corresponding public network IP address generates forward direction NAT session, while generating corresponding reversed NAT session, and memory module 404 can deposit
Storage is generating the corresponding reversed NAT session generated when forward direction NAT session.When access request arrives, CGN equipment meeting basis is deposited
Access request is forwarded to corresponding service terminal by the reversed NAT session of storage, is avoided repeatedly generating reversed NAT session, be improved
Efficiency of service reduces the wasting of resources.
In one embodiment, it can also include searching module 405, port mapping algorithm can be based on from memory module
Corresponding reversed NAT session is searched in the reversed NAT session stored in 404；If finding corresponding reversed NAT session, lead to
It crosses forwarding module 403 and the access request of requesting terminal is forwarded to corresponding with service terminal；Otherwise, by reversed session generation module
402 generate corresponding reversed NAT session and are stored in memory module 404.Such CGN equipment can utilize generated anti-
Access request is forwarded to corresponding service terminal to NAT session, avoids repeatedly generating reversed NAT session, improves service effect
Rate reduces the wasting of resources.
In one embodiment, further include data maintenance module 406, can safeguard stored in memory module 404 it is reversed
NAT session.In one embodiment, if failing to have new access request using the reversed NAT session for a long time, correspondence is cancelled
Reversed NAT session.Predetermined ageing time can be set, in the case where duration is more than predetermined ageing time, can be cancelled pair
The reversed NAT session answered.In one embodiment, data maintenance module fails to receive from requesting terminal within a certain period of time
Access request then cancels corresponding reversed nat port information table.In one embodiment, when service terminal is offline, then revocation with
The corresponding reversed nat port information table of the service terminal.
Such CGN equipment can real-time servicing, clear up reversed NAT session and reversed nat port information table, reach basis
Use state updates the effect of CGN equipment storage, on the one hand can clear up the memory space of CGN equipment, prevent the wasting of resources, separately
On the one hand during searching module is searched, the data volume for needing to retrieve, speed up processing can be reduced.
Service provider system of the invention includes any registration server being mentioned above and CGN equipment, and is supplied
Registration server inquires the outer net address of service terminal and the aaa server of port block message under CGN environment.Such service mentions
For in system, registration server can obtain the internal address of service terminal under CGN environment, outer net address and port block message,
When requesting terminal is in the service of service terminal under registration server selects CGN environment, CGN equipment can generate corresponding reversed
NAT conversation enables the terminal user in CGN environment externally to provide service, realizes that the service under CGN environment is passed through.
In one embodiment, the service terminal under CGN environment carries out process such as Fig. 5 of service registration in registration server
It is shown.
In 501, service terminal sends service registration request to registration server through CGN equipment.
In 502, registration server sends inquiry request, the port resource distribution of query service terminal to aaa server
Information.As shown in Figure 5, the protocol type of service terminal, private address (internal address), publicly-owned is stored in aaa server
Address (outer net address) and port block message.
In 503, aaa server returns the outer net address for the service terminal that registration server is inquired and port block message
Back to registration server.Registration server can show the service log of service terminal to user.
When access request is initiated to the service terminal under CGN environment in the requesting terminal on internet, as shown in Figure 6:
In 601, the visitor (requesting terminal) on internet selects demand in the information that registration server is shown
Service log, service log may include outer net address, internal address related information.
In 602, registration server is by the address of requesting terminal, the outer net address and registration server of service terminal
Determining port offset amount is sent to CGN equipment.CGN equipment can generate reversed nat port information table, and then generate reversed NAT
Session.
In 603, requesting terminal initiates the access request to service terminal through internet.Access request reaches CGN equipment
Afterwards, access request is forwarded to corresponding service terminal according to reversed NAT session by CGN equipment, realizes requesting terminal to service eventually
The access at end.
Such service provider system can actively be stepped on to registration server request service for the service terminal under CGN environment
Note, so that when user on the internet is intended to access service terminal letter can be provided to CGN equipment by registration server
Breath establishes reversed NAT session for CGN equipment, realizes switching of the access request to service terminal, reach under CGN environment with business
Unrelated Working level service is passed through, the service for enabling the terminal user in CGN environment externally to provide, and is not necessarily to user's operation mistake
Mostly additional process safeguards user experience.Meanwhile the service type loose coupling that this method and service terminal provide, have general
Property.It is open to fixed network broadband user that such service provider system can be used as a new business, or as network capabilities pair
Upper-layer service is open, brings increment for existing investment；It, can be effective as transitional technology in the application deployment into Ipv6 evolution process
Save the address Ipv4；As bottom-layer network ability, to OTT, (Over The Top provides a user various applications by internet
Service) business opening, improves the ability of network fining O&M.
The flow chart of one embodiment of service indexing means of the invention is as shown in Figure 7.
In step 701, registration server receives the access request from requesting terminal, and requesting terminal can be according to registration
The registered service log that server is shown determines access request.
In a step 702, registration server extracts the address of requesting terminal, the outer entoilage of service terminal according to access request
Location and port offset amount are simultaneously sent to the corresponding CGN equipment of service terminal.
By such method, the service log of registered service terminal and confession under CGN environment can be shown to user
Requesting terminal selection, is sent to corresponding CGN for the address of requesting terminal, the outer net address of service terminal and port offset amount and sets
It is standby, corresponding reversed NAT session is generated for CGN equipment, the terminal user in CGN environment is enable externally to provide service, is realized
Service under CGN environment is passed through.
In one embodiment, it when the terminal offer under CGN environment needs to issue the service of oneself, can be taken in registration
Business device carries out service registration.In one embodiment, the flow chart of the service registration part of service indexing means of the invention is such as
Shown in Fig. 8.
In step 801, registration server receives the service registration request of the service terminal under CGN environment, service
It include the internal address of service terminal in registration request.
In step 802, registration server is obtained according to from the service registration request that CGN equipment obtains from aaa server
The outer net address and port block message of service terminal.Be stored in aaa server the protocol information of service terminal, internal address,
Outer net address and port block message.
In step 803, internal address, outer net address and the port block message of registration server storage service terminal.
In step 804, what registration server showed service terminal includes the clothes of internal address, outer net address information information
Business record is selected for requesting terminal.
By such method, the service registration that registration server can receive the service terminal under CGN environment is asked
It asks, and obtains the internal address, outer net address and port block message of corresponding with service terminal, service log is provided and is selected for requesting terminal
It selects, enabling the service terminal under CGN environment, easily the user on internet provides service.
In one embodiment, when registration server shows that the corresponding service terminal in address is offline, revocation display is corresponded to
Service terminal service log.In one embodiment, the internal address, outer of the corresponding with service terminal of storage can also be cancelled
Net address and port block message.By such method, registration server can safeguard the service log of displaying, storage at any time,
To avoid the address information for showing service terminal to requesting terminal of mistake, guarantee the reliable of the information provided for requesting terminal
Property.
The flow chart of one embodiment of service retransmission method of the invention is as shown in Figure 9.
In step 901, CGN equipment according to from the requesting terminal that registration server obtains address, service terminal it is outer
Net address and port offset amount generate reversed nat port information table.Reversed nat port information table include requesting terminal address,
The outer net address and port offset amount of service terminal.
In step 902, CGN equipment can be generated reversed according to reversed nat port information table based on port mapping algorithm
NAT session.
In step 903, it when CGN equipment is connected to the access request from requesting terminal, is forwarded according to reversed NAT session
From corresponding service terminal under the access request to CGN environment that requesting terminal obtains.
By such method, CGN equipment can be according to the address of the requesting terminal of acquisition, the outer net address of service terminal
With port offset amount, reversed nat port information table is generated, and then generates reversed NAT session, makes the terminal user in CGN environment
Service can be externally provided, realize that the service under CGN environment is passed through.
In one embodiment, after generating reversed NAT session, CGN equipment can store the reversed NAT session of generation,
When access request arrives, access request can be forwarded to corresponding service eventually according to the reversed NAT session of storage by CGN equipment
End.Such method avoids repeatedly generating reversed NAT session, improves efficiency of service, reduces the wasting of resources.
In one embodiment, after generating reversed nat port information table, CGN equipment determines just according to port offset amount
The deviant of true destination port, and search whether in stored reversed NAT session destination port and stored certain is anti-
Match to NAT session.Stored reversed NAT session generates when may generate corresponding forward direction NAT session by CGN equipment,
It is also possible to be generated by the access request before basis.If finding matched reversed NAT session, the reversed NAT session is utilized
Switching access request；If failing to find, new reversed NAT session is created, the outer net destination address of access request is replaced
At corresponding internal address, former port offset amount information, benefit are replaced using the destination port that scheduled port mapping algorithm determines
The switching of access request is completed with the reversed NAT session of generation, meanwhile, CGN equipment can store the reversed NAT session of generation.
By such method, CGN equipment can make full use of generated reversed NAT session without repeatedly generating, and improve
Efficiency of service reduces the wasting of resources.
In one embodiment, if failing to have new access request using the reversed NAT session for a long time, correspondence is cancelled
Reversed NAT session.Predetermined ageing time can be set, in the case where duration is more than predetermined ageing time, can be cancelled pair
The reversed NAT session answered.In one embodiment, when failing to receive the access request from requesting terminal within a certain period of time,
Then cancel corresponding reversed nat port information table.In one embodiment, when service terminal is offline, then revocation and the service are whole
Hold corresponding reversed nat port information table.
By such method, CGN equipment being capable of real-time servicing, the reversed NAT session of cleaning and reversed nat port information
Table achievees the effect that update the storage of CGN equipment according to use state, on the one hand can clear up the memory space of CGN equipment, prevent
The wasting of resources can reduce the data volume for needing to retrieve, quickening processing on the other hand during searching module is searched
Speed.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (17)
1. a kind of registration server characterized by comprising
Display module is serviced, for showing registered service log to user, the service log includes corresponding Working level
The internal address and outer net address of service terminal under network address translation CGN environment；
Request module, for the access request of acquisition request terminal, the requesting terminal is according to the registration server exhibition
The service log shown determines access request；
Information extraction modules, for according to the access request extract the address of requesting terminal, service terminal outer net address and
Port offset amount；
Information sending module, for sending the outer net address of the address of the requesting terminal, service terminal and port offset amount
Give the service terminal corresponding CGN equipment.
2. server according to claim 1, which is characterized in that further include:
Registration Module, for receiving the service registration request of the service terminal under CGN environment, in the service registration request
Internal address including the service terminal；
Enquiry module, for obtaining the service terminal from authentication and authorization charging aaa server according to the service registration request
Outer net address and port block message, so that the service display module shows the internal address of the service terminal, outer entoilage
Location.
3. server according to claim 2, which is characterized in that further include:
Information storage module, for storing the internal address, outer net address and port block message of the service terminal；
And/or
The information extraction modules are also used to true according to the both port of origination value of the port block of the obtained distribution of the correspondence service terminal
The fixed port offset amount.
4. server according to claim 1, which is characterized in that further include information revocation module, in the service
In the case that terminal is offline, revocation shows the service log for the corresponding with service terminal that the service display module is shown.
5. a kind of CGN equipment characterized by comprising
Information table generation module, for the outer entoilage according to address, service terminal from the requesting terminal that registration server obtains
Location and port offset amount generate reversed nat port information table, the reversed nat port information table include requesting terminal address,
The outer net address and port offset amount of service terminal；
Reversed session generation module, for being generated based on port mapping algorithm corresponding according to the reversed nat port information table
Reversed NAT session；
Forwarding module, for right under from the access request that requesting terminal obtains to CGN environment according to the reversed NAT session forwarding
The service terminal answered.
6. CGN equipment according to claim 5, which is characterized in that further include:
Memory module, the reversed NAT session generated for storing the reversed session generation module.
7. CGN equipment according to claim 6, which is characterized in that further include:
Searching module, for searching reversed NAT session based on port mapping algorithm according to the reversed nat port information table.
8. CGN equipment according to claim 5, which is characterized in that further include:
Data maintenance module, for not having the case where new access request in predetermined ageing time in the reversed NAT session
Under, cancel the reversed NAT session；
And/or
In the case where not receiving the access request from the requesting terminal in the given time, the reversed NAT is cancelled
Port information table；
And/or
For cancelling the corresponding reversed nat port information table in the case where service terminal is offline.
9. a kind of service provider system, which is characterized in that including the Claims 1 to 4 any registration server and right
It is required that 5~8 any CGN equipment, and
Aaa server, for providing the outer net address of service terminal and port block letter under CGN environment to the registration server
Breath.
10. a kind of service indexing means, which is characterized in that
Registration server receives the access request from requesting terminal, wherein the requesting terminal is according to the registration server
The registered service log shown, the service log include the internal address of service terminal and outer under corresponding CGN environment
Net address determines access request；
According to the address of access request extraction requesting terminal, the outer net address of service terminal and port offset amount and it is sent to
The corresponding CGN equipment of the service terminal.
11. according to the method described in claim 10, it is characterized by further comprising:
The service registration request of the service terminal under CGN environment is received, includes the service in the service registration request
The internal address of terminal；
The outer net address and port block message of the service terminal are obtained from aaa server according to the service registration request, with
Housecoat business display module shows the internal address of the service terminal, outer net address.
12. according to the method for claim 11, which is characterized in that further include: store the service terminal internal address,
Outer net address and port block message；
And/or
It is described that reversed nat port information table is generated according to the access request further include: to be obtained according to the correspondence service terminal
The both port of origination value of the port block of distribution determines the port offset amount.
13. according to the method described in claim 10, it is characterized by further comprising: in the case where the service terminal is offline,
Cancel the service log of the corresponding with service terminal shown.
14. a kind of service retransmission method, which is characterized in that
CGN equipment is according to the outer net address and port offset of address, service terminal from the requesting terminal that registration server obtains
Amount generates reversed nat port information table, the reversed nat port information table include the address of requesting terminal, service terminal it is outer
Net address and port offset amount；
According to the reversed nat port information table, corresponding reversed NAT session is generated based on port mapping algorithm；
According to corresponding service terminal under the reversed NAT session forwarding access request to CGN environment.
15. according to the method for claim 14, which is characterized in that further include:
Store the reversed NAT session generated.
16. according to the method for claim 15, which is characterized in that further include:
Port mapping algorithm, which is based on, according to the reversed nat port information table searches reversed NAT session.
17. according to the method for claim 14, which is characterized in that further include:
If the reversed NAT session does not have new access request in predetermined ageing time, the reversed NAT session is cancelled；
And/or
If not receiving the access request from the requesting terminal in the given time, the reversed nat port information is cancelled
Table；
And/or
If service terminal is offline, the corresponding reversed nat port information table is cancelled.
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