CN101242413A - Service resource address acquisition system and method in multi-layer NAT network under one root - Google Patents
Service resource address acquisition system and method in multi-layer NAT network under one root Download PDFInfo
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Abstract
The invention discloses a system and a method for a service resource address access system in a same-rooted multilayer NAT network. By arranging an index service device in the multilayer NAT network, mappings of a service resource in private network in the multilayer NAT network are established, the service resource is registered in the index service device, a client makes a query based on the index service device about the service resource, and makes use of the service resource in private network. By this invention, in a server-client network, a server can not only be arranged in a public network, but also a multi-level private network; the service quality of transmission is improved, and the demand pressure of public network address and data transmission ability is lowered.
Description
Technical field
The present invention relates to the computer network communication technology field, more specifically, the present invention relates to system for obtaining service resource address and method in a kind of same root multi-layer NAT network.
Background technology
At present, based on the internet address insufficient space of IPv4, can't satisfy the demand of numerous users to network insertion, particularly for such as the country that the such network demand of China is big, address assignment is not enough, it is more outstanding that the insufficient space problem seems.From the application and the deployment of reality, (Network Address Translation, NAT) technology is to solve a kind of effective ways that netizen under the situation of internet ip (Internet Protocol) address shortage inserts the Internet to network address translation.
NAT is Internet engineering duty group (Internet Engineering Task Force, IETF) a standard, allow a whole mechanism to appear on the Internet, inner private network address (IP address) is converted to legitimate network public IP address with a public IP address.Network address port conversion (Network Address Port Translation, NAPT) be that the notion of " NAT " is further extended, in the switching network address, conversion transport layer sign (for example inquiry ID of the port numbers of TCP/UDP, ICMP), thus be the transport layer label multiplex of a plurality of internal hosts an only external address.NAPT makes one group of main frame can share an only external address.Usually the NAT that mentions is meant NAPT.
Along with popularizing and development of internet technology of the increasing of personal computer device, network access equipment, increasing company, group and family wish the mode of these information equipments with network organized together, and access the Internet, and for the purpose of safety, node how to hide high safety grade on network is the problem that a lot of companies face.Urgent at this IP address famine, equipment network demand for interconnection, and exist under the situation of a large amount of potential safety hazards, by single-stage or multistage private network structure that the NAT technology forms, it is more and more general to insert the Internet in actual deployment.
The control range of NAT device is to extend downwardly into network range between the outer net interface of next NAT by the network that the Intranet interface of this NAT device connects along this interface, does not comprise other NAT device in the network range.The network that relative NAT device Intranet interface connects, the network that this NAT device outer net interface connects is the direct upper layer network of current network, is called for short direct upper strata; The network that relative NAT device outer net interface connects, the network that this NAT device Intranet interface connects is the direct lower floor network of current network, is called for short direct lower floor.The NAT device that directly is connected on the Internet is called root NAT.Do a directed edge from each direct upper strata NAT to direct lower floor, in formed topological diagram, if the paths of existence from NAT A to NAT B claims that then NAT A is the same upper strata NAT of NAT B.If also have the paths of NAT A simultaneously, claim that then NAT B and NAT C are with root NAT to NAT C.
Various services on the Internet at present generally all have public network IP address, and the server of disposing in the private network in the NAT network (for example Web server, ftp server etc.), usually only be a certain company or the mechanism's service in this private network, only to being in the main frame of same NAT under controlling with it as seen.For being positioned at main frame that NAT has jurisdiction over,,, also just can not obtain the resource on these servers because protocols limit can not have access to these services though physical link is arranged with these servers with root lower floor with these servers.
Summary of the invention
For overcoming the defective that Service Source can not obtain in the existing same root multi-layer NAT network environment, the present invention proposes service unit address acquisition system and method in a kind of same root multi-layer NAT network.
According to an aspect of the present invention, provide the index service device of Service Source in a kind of same root multi-layer NAT network, comprising:
Top index service unit, be connected with global network by top service bus device, the network address and the port of the Service Source in the network that record global network and the NAT device that directly is connected with global network are controlled, and the network address and the port of described Service Source are provided for subscriber equipment;
At least one base index service unit, be connected with corresponding private network by the service bus device, write down the network address and the port of the Service Source in other private networks that described private network and described private network extend downwards by NAT device, and the subscriber terminal equipment in other private networks that extend by NAT device for described private network and described private network provides the network address and the port of described Service Source downwards;
Wherein, the base index service unit layer index service unit that makes progress sends the register requirement application and adds described index service device, the packet of described register requirement is determined to carry through NAT device in index service unit, described upper strata, extract the hierarchical information in the described register requirement, if described base index service unit is the subindex service unit of index service unit, described upper strata, the registration of described base index service unit is finished in index service unit, described upper strata, if described base index service unit is not the subindex service unit of index service unit, described upper strata, index service unit, described upper strata returns the network address of the index service unit that comprises described NAT device correspondence and the response message of port.
Wherein, if the level of described base index service unit is bigger by 1 than the level of index service unit, described upper strata, then described base index service unit is the subindex service unit of index service unit, described upper strata.
Wherein, whether index service unit, described upper strata is identical according to the described base index service unit network address of carrying in the source address of the packet of described application for registration and the described application for registration message, judges whether the packet of carrying described register requirement passes through NAT device.
Wherein, global network connects top index service unit, private network only connects a base index service unit, and described base index service unit can and insert a plurality of network service resources registrations in other private networks of described private network for the private network of its access.
Wherein, index service unit, described upper strata can be top index service unit, also can be the base index service unit.
According to a second aspect of the invention, provide the index service equipment of Service Source in a kind of same root multi-layer NAT network, comprising:
Storage medium, described storage medium is used for the described index service equipment mark of stored record, host address, port information and hierarchical information, described storage medium is used to store the direct upper strata of described index service equipment and the directly network address of lower floor's index service equipment and port information and the directly network address and the port information of lower floor's index service equipment mark and the direct corresponding NAT device of lower floor's index service equipment, and described storage medium is used for the network address and the port information of the network address, port, resource name and the corresponding NAT device of stores service resource;
Communication unit, described communication unit connects with the service bus device, is responsible for transceive data;
Logic control element, the reading in and writing out of the transmitting-receiving of described logic control element control data and data.
Wherein, described index service equipment further comprises:
The hierarchical information record sheet is used to write down the hierarchical information of described index service equipment;
Target index server record sheet is used to write down the network address and the port information of ancestors' index service equipment of described index service equipment;
The child index server record sheet is used to write down the network address and the port information of sign, the network address, port and corresponding NAT device of the subindex service equipment of described index service equipment;
Network service resource device recording table is used to write down the network address and the port information of the network address, port, resource name and the corresponding NAT device of Service Source;
" network service resource address lookup message " replys control table, is used for the generation of the response message of Control Network service resource address query requests;
The index service logic control element, described index service logic control element is connected with described communication unit with described target index service device recording table, described subindex service unit record sheet, described network service resource device recording table respectively, and described target index service device recording table, described subindex service unit record sheet, described network service resource device recording table and described communication unit are carried out read-write operation; Described index service logic control element is replied control table from " network service resource address lookup message " and is read control information generation response message; Described index service logic control element is connected with the hierarchical information record sheet, reads hierarchical information.
Wherein, described index service equipment further comprises: the basic configuration information record sheet, described basic configuration information record sheet links to each other with described index service logic control element, is used to write down described index service device identification, host address and port information.
According to a third aspect of the invention we, provide the index service register method of base index service unit in a kind of same root multi-layer NAT network, described method comprises:
Step 10), top index service unit begin to receive register requirement, and described base index service unit inserts private network by the service bus device, and upwards the layer index service unit sends register requirement;
Step 20), after whether the packet of determining to carry described register requirement when index service unit, described upper strata pass through NAT device, extract the hierarchical information in the described register requirement;
Step 30) if described base index service unit is the subindex service unit of index service unit, described upper strata, then the network address and the port of the NAT device of the network address of the described base index service unit of record, port, sign and correspondence in the subindex service unit record sheet of index service unit, described upper strata return success response message;
Step 40) if described base index service unit is not the subindex service unit of index service unit, described upper strata, then search the index service unit of described NAT device correspondence at the subindex service unit record sheet of index service unit, described upper strata, if the index service unit of described correspondence exists, return the network address of the index service unit that comprises described NAT device correspondence and the response message of port to the described base index service unit that proposes register requirement;
Step 50), after the described base index service unit that proposes register requirement extracts the network address and port in the described response message, send register requirement to the index service unit of described correspondence.
Wherein, in the step 10), index service unit, described upper strata can be top index service unit, also can be the base index service unit.
Wherein, step 20) further comprise: whether index service unit, described upper strata equates according to the described base index service unit network address of carrying in the source address of the packet of described application for registration and the described application for registration message, judges whether the packet of carrying described register requirement passes through NAT device.
Wherein, step 30) further comprise: if the level of described base index service unit is bigger by 1 than the level of index service unit, described upper strata, then described base index service unit is the subindex service unit of index service unit, described upper strata.
Wherein, global network connects top index service unit, private network only connects a base index service unit, and described base index service unit can and insert a plurality of network service resources registrations in other private networks of described private network for the private network of its access.
According to a forth aspect of the invention, provide the system for obtaining service resource address in a kind of same root multi-layer NAT network, comprising:
Described index service device;
Top service bus device is connected with described global network with the top index service unit of described index service device respectively, and the index service device is inserted global network;
The service bus device is connected with private network with the base index service unit of described index service device respectively, and described index service device is inserted described private network;
Wherein, described index service device is after receiving the network service resource registration/network service resource request message of index service device client by described top index service bus unit or the transmission of described service bus device, whether can carry out according to logic determines, if can carry out, return the request success message; For described network service resource registration message, if can not carry out, and can be redirected, then return redirect message, described client re-registers; For described network service resource request message, if can not carry out, if and the index service unit that accepts request in the described index service device is not top index service unit, then return the redirect message of the network address and port in the target index service device recording that comprises described index service unit, described client resends request.
Wherein, described index service device connects global network through top service bus device, uses the network address of global network to address, and becomes the part of described global network.
Wherein, described index service device connects private network through the service bus device, uses the network address of private network to address, and becomes the part of the private network of described access.
Wherein, in the described index service device, global network connects top index service unit, private network only connects a base index service unit, and described base index service unit can and insert a plurality of network service resources registrations in other private networks of described private network for the private network of its access.
Wherein, described index service device client comprises subscriber computer and the service resource apparatus in global network and the private network.
According to a fifth aspect of the invention, provide the method for index service device client registered network Service Source in a kind of same root multi-layer NAT network, comprising:
Step 10), described index service device client send the network service resource registration message to the index service device, and described registration message comprises the resource name of the network address, port and the registration of Service Source;
Step 20), the described index service device of receiving described service registry message judges whether described packet of carrying registration message passes through NAT device;
Step 30) if through NAT device, and if the level in the registration message bigger by 1 than the level of described index service unit, record comprises the network address of described NAT device, the described Service Source registration message of port, returns success registration message;
Step 40) if through NAT device, if and the level in the registration message is big by 1 unlike described index service unit level, when in the network of described NAT device control the index service unit being arranged, return the network address that comprises described index service unit and the redirect message of port to described client;
Step 50), described client extracts the network address of the described index service unit that returns and the network address and the port that port is replaced original index service device from described redirect message, send register requirement.
Wherein, described index service device client comprises subscriber computer and the service resource apparatus in global network and the private network.
Wherein, described index service unit can be top index service unit, also can be the base index service unit.
Wherein, described method further comprises: described index service device client is set the number of attempt and the overtime control of register requirement of register requirement, if register requirement surpasses described number of attempt or the described overtime control of setting, finishes this request.
Wherein, step 20) further comprise: whether source address and the network address of described client of described index service device by judging described registration message be identical, determines whether described registration message passes through NAT device.
Wherein, step 20) further comprise: if described registration message does not pass through NAT device, the Service Source information of record registration message returns success response message.
According to a sixth aspect of the invention, provide the method for the requester network Service Source of index service device client in a kind of same root multi-layer NAT network, comprising:
Step 10), described index service device client are judged the response message that has or not from the index service device, send network service resource address lookup message to described index service device then, described query messages comprises the Service Source title at least, when the response message that exists from described index service device, described query messages also comprises the respondent in the described response message;
Step 20), receive whether the index service unit judges self of the described index service device of described network service resource query messages exists requested described network service resource, will be requested resource status and be set at and find, do not find;
Step 30), the index service unit of receiving the described index service device of described network service resource query messages is determined to comprise self location status: independent top index service unit, top index service unit, middle index service unit, bottom index service unit;
Step 40), receive that the index service unit of described index service device of described network service resource query messages is according to the described respondent who comprises in the described query messages, determine query messages direction state: when not having described respondent in the message, be set at " initial query message "; When described respondent is a subindex service unit of receiving the described index service unit of described network service resource query messages, be set at " upwards query messages "; When described respondent is the index service unit of receiving in the target index server record of described index service unit of described network service resource query messages, be set at " query messages downwards ";
Step 50), receive described network service resource query messages described index service device the index service unit according to describedly be requested resource status, described self location status and described query messages direction state mates in following table, returns corresponding answer message;
| Index service cell position state | Be requested resource status | The query requests direction | Return answer message | The answer message additional information |
| Top index service unit | Do not find | Initial query message | Redirect message, redirection target are the corresponding subindex service unit network address and port | The respondent is this index service unit networks address |
| Top index service unit | Do not find | Query messages makes progress | Failed message | |
| Top index service unit | Find | Initial query message | Redirect message, redirection target are the corresponding subindex service unit network address and port, the Service Source network address and port | The respondent is this index service unit networks address, |
| Top index service unit | Find | Query messages makes progress | Success message comprises the Service Source network address and port | |
| The intermediary service unit | Do not find | Initial query message | Redirect message | Redirection target can be according to policy selection: higher level's index service unit, subordinate index service unit, top index service unit |
| Middle index service unit | Do not find | Query messages makes progress | Redirect message, redirection target are the network address and the port in the local target index server record | The respondent is this index service unit networks address |
| Middle index service unit | Do not find | Downward query messages | Redirect message, redirection target are the corresponding subindex service unit network address and port | The respondent is this index service unit networks address |
| Middle index service unit | Find | Initial query message | Redirect message, redirection target are the corresponding subindex service unit network address and port, the Service Source network address and port | The respondent is this index service unit networks address |
| Middle index service unit | Find | Query messages makes progress | Success message comprises the Service Source network address and port | The respondent is this index service unit networks address |
| Middle index service unit | Find | Downward query messages | Redirect message, redirection target are the corresponding subindex service unit network address and port, the Service Source network address and port | The respondent is this index service unit networks address |
| Bottom index service unit | Do not find | Initial query message | Redirect message, redirection target are the network address and the port in the local target index server record | The respondent is this index service unit networks address |
| Bottom index service unit | Do not find | Downward query messages | Failed message | |
| Bottom index service unit | Find | Initial query message | Success message comprises the Service Source network address and port | |
| Independent top index service unit | Do not find | Query messages (initially) | Failed message | |
| Independent top index service unit | Find | Query messages (initially) | Success message comprises the Service Source network address and port |
Wherein, in the step 10), described respondent is the index service unit that sends response message in the described index service device.
Wherein, step 30) in, described top index service unit refers to that this index service unit has only subordinate's subindex service unit, do not have higher level's index service unit; The index service unit refers to that there is subordinate's subindex service unit this index service unit, does not have higher level's index service unit in the middle of described; Described bottom index service unit is meant that this index service unit does not have subordinate's subindex service unit, has only higher level's index service unit; The top index service of described independence unit is meant does not have the top index service of subindex service unit unit.
By using the present invention, in the network application of client-server pattern, server not only can be deployed in global network, can also be deployed in the multistage private network; Improved the service quality (Qos) of transmission simultaneously, reduced demand pressure global network address and data transmission capabilities.
Description of drawings
Fig. 1 is the same root multi-layer NAT network schematic diagram;
Fig. 2 is a service end address acquisition system structural representation;
Fig. 3 is a NAT device connection matrix schematic diagram;
Fig. 4 is index service device and index service cellular construction schematic diagram;
Fig. 5 is that the index service device is set up schematic flow sheet;
Fig. 6 is that the index service device is set up schematic flow sheet;
Fig. 7 is that the index service device is set up schematic flow sheet;
Fig. 8 is the inquiry mode schematic diagram based on the known service entrance in the global network;
Fig. 9 is the inquiry mode schematic diagram based on the service entrance of this locality storage;
Figure 10 is service client comprises the broadcast acquisition service entrance of service entrance by monitoring a schematic flow sheet;
Figure 11 is a server agent broadcast mode schematic diagram;
Figure 12 is the process flow figure that the index service device is received the Service Source registration message;
Figure 13 is a server process network service resource registration message reciprocal process flow chart;
Figure 14 is that the network service resource inquiry handles " network service resource address lookup message " reciprocal process flow chart;
Figure 15 is the process flow figure that the index service device is received the Service Source network address request message of client;
Figure 16 is the process flow figure of Service Source network address request message.
Embodiment
Below in conjunction with the drawings and specific embodiments, index service device, system for obtaining service resource address and method in the same root multi-layer NAT network provided by the invention are described further.
In traditional internet, Service Source generally only is deployed in the global network.And in same root multi-layer NAT network, Service Source can be deployed in along the annexation of private network in each layers such as ground floor, the second layer and the 3rd layer.The access quantity that same root multi-layer NAT network not only can extend one's service can also enlarge the deployment scope of Service Source.Concern according to physical connection, the user is when using the network service, should directly visit the Service Source in the network that is deployed in the control of each layer NAT device, and not only can visit the Service Source that is deployed in the global network, like this, can effectively reduce the pressure of the network of root NAT device and control thereof, also improve the service quality of network service simultaneously.Yet, because the restriction of existing network protocol, the network address of NAT device can not be on network route.Therefore, in the same root multi-layer NAT network, the Service Source requestor can't obtain the network address and the port of network service resource in this network environment.The network address of NAT device refers to the network address with the outer net interface binding of NAT device.For larger private network, NAT router outer net interface can be bound with a plurality of network addresss.In network management, can a plurality of network addresss be mapped as a NAT device by the mode of enumerating the address or enumerating the network segment.Domestic consumer can pass through low side NAT router access network voluntarily, and generally only bind with a network address at this NAT router outer net interface.In the description to the NAT router, only bind with a network address at a NAT router outer net interface below.Therefore, a NAT device can be expressed with the network address with the outer net interface binding of this NAT device.Those skilled in the art are not difficult to find, following description also is applicable to the NAT router of outer net interface with the binding of a plurality of network addresss.
Figure 1 shows that the same root multi-layer NAT network structural representation, a private network 4-1 inserts 3, one private network 4-2 of global network by NAT device 1001 and inserts private network 4-1 by another NAT device 1002.Insert the network of the private network of global network 3 by NAT device 1001, insert the network of the private network 4-2 of private network 4-1 by NAT device 1002 for this NAT device control for this NAT device control.Directly the NAT device that links to each other with global network 3 is the root NAT device.Each private network is the number of plies of this private network to the number of the minimum NAT device of global network 3 processes, and this path is the shortest path of private network to global network 3.Private network is few more to the number of plies of global network 3, and the expression level is high more.If two private networks have at least a NAT device identical in the shortest path of global network, then these two private networks have common root NAT device.The multi-layer NAT network can be counted as the combination of a plurality of same root multi-layer NAT networks.
In order to make the Service Source requestor can obtain the network address and the port of the network service resource in the same root multi-layer NAT network, in an embodiment according to the present invention, a kind of system for obtaining service resource address is provided, be used at same root multi-layer NAT network, the helping service resource requestor is obtained the network address and the port of network service resource in this network environment.
Figure 2 shows that the system for obtaining service resource address structural representation.System for obtaining service resource address 10 comprises: index service device 2001, be used for writing down the network address and the port of the server 3001 of global network 3 and each private network, and the network address and the port of server 3001 are provided for the subscriber terminal equipment 6001 in global network 3 and each private network; Top service bus device 1 is connected with global network with index service device 2001 respectively, is used for the index service device is inserted global network 3; Service bus device 2 is connected with private network with index service device 2001 respectively, is used for index service device 2001 is inserted private network.Index service device 2001 links to each other with global network 3 by top service bus device 1, inserts existing network, uses the network address of global network to address, and is the part of global network; Index service device 2001 links to each other with private network by service bus device 2, inserts existing network, uses the network address of the private network that links to each other to address, and is the part of the private network of access.
Fig. 3 illustrates the connected mode of NAT device connection matrix 1001.In NAT device connection matrix 1001, the relation between NAT device is by private network that is connected with NAT device connection matrix 1001 and global network decision.Private network and global network with the concatenate rule of NAT device are: NAT device connection matrix 1001 has a circuit 5 that inserts global network at least; Each private network has a circuit 6 that inserts NAT device connection matrix 1001 at least; Each private network can not have, can have yet many circuits 7 that inserted to this private network by NAT device connection matrix 1001.With three grades of NAT network configurations shown in Fig. 3 a is example, and Fig. 3 b is depicted as NAT device connection matrix 1001 connection diagrams of Fig. 3 a, comprising global network 3, private network.NAT device connection matrix 1001 inserts global network by circuit 5, and private network inserts NAT device connection matrix 1001 by circuit 6, and NAT device connection matrix 1001 inserts private network by circuit 7.
Figure 4 shows that the structural representation of index service device 2001.Shown in Fig. 4 a, index service device 2001 is made up of top index service unit 2011 and at least one base index service unit 2021.Top index service unit 2011 is connected with global network 3 by top service bus device 1; At least one base index service unit 2021 is connected with private network 4 by service bus device 2.The index service unit is the general designation of top index service unit 2011 and base index service unit 2021, also can be called index service equipment, the composition 26S Proteasome Structure and Function of top index service unit 2011 and base index service unit 2021 is that index service unit 2801 is identical with index service equipment.
Shown in Fig. 4 b, index service unit 2801 comprises: index service logic control element 2100, basic configuration information record sheet 2101, hierarchical information record sheet 2102, target index service device recording table 2103, subindex service unit record sheet 2104, network service resource device list 2105, message buffering district 2109, communication unit 2110 and " network service resource address lookup message " are replied control table 2108.
Index service logic control element 2100 is used to control the execution of index service, be connected with communication unit 2110 with basic configuration information record sheet 2101, target index service device recording table 2103, subindex service unit record sheet 2104, network service resource device list 2105, message buffering district 2109 respectively, the data double-way transmission, index service logic control element 2100 is connected with hierarchical information record sheet 2102, the hierarchical information of reception hint service equipment; Basic configuration information record sheet 2101 is used for minute book index service unit marks, this index service unit host address and this index service unit serve port; Hierarchical information record sheet 2102 is used for the hierarchical information of minute book index service unit; Target index server record sheet 2103 is used to write down the network address, the port of ancestors' index service unit; Child index server record sheet 2104 is used to write down the network address, port, sign of subindex service unit and the network address of corresponding NAT device, sees Table 1.
Table 1 subindex service unit record sheet
| Sign | The network address | Port | The NAT device network address |
| Config103 | 10.23.0.22 | 11223 | 192.168.1.23 |
Network service resource device list 2105 is used to write down the network address of the corresponding NAT device of network service resource the sign network address, port and this resource identification corresponding with this resource identification, sees Table 2;
Table 2 network service resource record sheet
| Sign | The network address | Port | The NAT device network address |
| Server128 | 10.23.0.128 | 80 | 192.168.1.23 |
" network service resource address lookup message " replys the generation that control table 2108 is used for the response message of Control Network service resource address query requests, sees Table 3.
Table 3 " network service resource address lookup message " is replied control table
| The response message control code | Type of message | Response unit (Y/N) | Redirection target (Y/N) | Be redirected strategy (higher level, subordinate, top) | Service Source (Y/N) |
| 00000 | Failure | N | N | N | |
| 00100 | Success | N | N | Y | |
| 11100 | Be redirected | Y | Y | Subordinate | Y |
The index service logic control element reads this index service unit marks from basic configuration information record sheet 2101, this index service unit host address, this index service unit serve port, write down 2102 reading and recording hierarchical information from hierarchical information, write down the network address of 2103 reading and recording ancestors index servers from the target index server, port, the network address from child index server record sheet 2104 reading and recording subindex service units, port, the network address of the NAT device of sign and correspondence, the network address from network service resource device list 2105 reading and recording service units, port, the network address of the NAT device of sign and correspondence, read the information the packet that temporary transient preservation receives from message buffering district 2109, read the data of receiving from communication unit 2110; Simultaneously, the index service logic control element writes this unit marks according to carrying out needs to basic configuration information record sheet 2101, this unit host address, this unit serve port, write the record hierarchical information to hierarchical information record 2102, write the network address of record ancestors index server to target index server record 2103, port, write the network address of record subindex service unit to child index server record sheet 2104, port, the network address of the NAT device of sign and correspondence, write the network address of record service unit to network service resource device list 2105, port, the network address of the NAT device of sign and correspondence, write information in the packet that temporary transient preservation receives to message buffering district 2109, write the data that to send to communication unit 2110.
The index service logic control element is replied control table 2108 according to the execution needs from " network service resource address lookup message " and is read control information generation response message.
In the multi-level NAT network environment of embodiments of the invention, the index service device provides registration service for various Service Sources in the network, is the client of request network service resource the provide services on the Internet network address and the interface querying service of resource correspondence simultaneously.
When the Internet resources with the private network under the root NAT device being provided registration and inquiry, need an index service unit to add the index service device, in the index service device, provide index service for described Internet resources.The process that the index service unit adds the index service device comprises: by top index service unit starting, finish index service device knowledge just, insert private network by the service bus device, can carry out network service resource registration and network service resource inquiry; Secondly, the base index service unit in the network of root NAT device control adds system to the index service device registration; Once more, second layer NAT base index service unit adds system to the index service device registration; Once more, the 3rd layer of NAT base index service unit adds system to the index service device registration.In a manner described, as required, the base index service unit adds the index service device in proper order, for service unit end address acquisition system 10 provides index service.Has only a top index service unit in the global network; Has only a base index service unit in each private network.The index service unit can be the registration of the multiple servers in the same private network.
Receive that the index service unit of the registration message of lower floor index service unit carries out as follows, the index service unit is according to the index service unit networks address of carrying in the source address of the packet of application for registration and this application for registration message, judges that the index service unit that carries is whether in the network with the control of root NAT device; If in the network of NAT device control, do not illustrate that this configuration server not in root NAT network, returns registration failure message; If in the network of NAT device control, extract the hierarchical information in this register requirement, if level is bigger by 1 than current index service unit, then the message that succeeds in registration is returned to the index service unit that proposes registration in the network address of the NAT device of the network address of this index service unit of record, port, sign and correspondence in subindex service unit record sheet.If level is big by 1 unlike current index service unit, then search the index service unit of same NAT device correspondence at subindex service unit record sheet, if this index service unit exists, return the network address of the index service unit that comprises the NAT device correspondence and the response message of port to the index service unit that proposes register requirement, the index service unit that proposes register requirement then sends register requirement to the index service unit of described correspondence, and as above flow process re-executes; If the record of the index service unit of this NAT device correspondence not in the subindex service unit record sheet returns registration failure message to the index service unit that proposes register requirement.
Fig. 5 illustrates the index service device and sets up flow process, be used to illustrate how the base index service unit under the root NAT device adds the index service device, as shown in the figure, index service device 2 001 is connected with global network by top index service unit 2011 and carries out knowledgeization just.This top index service unit 2011 is furnished with global unique ip address, and this address and the port that service is provided are known service entrance in system.NAT device 1010 directly inserts global network, is the root NAT device.Base index service unit 2021 is connected with the network of root NAT device control.NAT device is made amendment to the source or the destination address of the packet of process, ignores the description of NAT device to the data packet modification among this figure.The idiographic flow that the index service device is set up below is described:
● the base index service unit 2021 in the network of root NAT device control sends application for registration message to top index service unit 2011; The network address, port, sign, the default hierarchical information that comprise index service unit 2021 in this message are 1, show that this index service unit 2021 is positioned at the beeline of the network of root NAT device control to global network.
● top index service unit 2011 is according to the index service unit networks address of carrying in the network address of the packet of carrying this application for registration and this application for registration message, judges that this configuration server is whether in the network of NAT device control; If in the network of NAT device control, extract the hierarchical information in this register requirement, if level is bigger by 1 than current index service unit, then the message that succeeds in registration is returned to index service unit 2021 in the network address of the NAT device 1010 of the network address of this index service unit 2021 of record, port, sign and correspondence in subindex service unit record sheet.If level is big by 1 unlike current index service unit, simultaneously the record of the index service unit of this NAT device correspondence not in the subindex service unit record sheet returns registration failure message; If in the network of NAT device control, do not return registration failure message.
Fig. 6 illustrates the index service device and sets up flow process, is used to illustrate that the base index service unit under the second layer NAT device adds the flow process of index service device.This top index service unit 2011 is furnished with global unique ip address, and this address and the port that service is provided are known service entrance in system, maybe can obtain by the method for system definition.First NAT device 1010 directly inserts global network, is the root NAT device.The first index service unit 2021 is deployed in the network of root NAT device 1010 controls.Second NAT device 1020 directly inserts the network of root NAT device 1010 controls, and the second index service unit 2031 is deployed in the network of second NAT device, 1020 controls.NAT device is made amendment to the source or the destination address of the packet of process, ignores the description of NAT device to the data packet modification among this figure.The idiographic flow that the index service device is set up below is described:
● application for registration message is initiated to top index service unit 2011 in the second index service unit 2031 in the network of second NAT device, 1020 controls, the network address, port, sign, the prefabricated hierarchical information that comprise the second index service unit 2031 in this message are 2, show that this index service unit 2031 is positioned at the beeline of the network of second NAT device, 1020 controls to global network.
● top index service unit 2011 is according to the index server network address of carrying in the network address of the packet of carrying this application for registration and this application for registration message, judges that this configuration server is whether in the network of NAT device control; If in the network of NAT device control, extract the hierarchical information in this register requirement, if level is big by 1 unlike current index service unit, then search index service unit with NAT device 1010 correspondences at subindex service unit record sheet, if this index service unit exists, return the network address of the index service unit 2021 that comprises NAT device 1010 correspondences and the response message of port to the second index service unit 2031.
● after the response message of top index service unit 2011 is received in the second index service unit 2031,, initiate application for registration message to the index service device according to the network address, the port information of the index service unit 2021 that comprises in the message; The network address, port, the prefabricated hierarchical information that comprise the second index service unit 2031 in this application message are 2, show that this index service unit 2031 is positioned at the beeline of the network of second NAT device, 1020 controls to global network.
● the first index service unit 2021 is according to the index service unit networks address of carrying in the network address of the packet of carrying this application for registration and this application for registration message, judges that this index service unit is whether in the network of NAT device control; If in the network of NAT device control, extract the hierarchical information in this register requirement, if level is bigger by 1 than current index service unit, then the message that succeeds in registration is returned to the second index service unit 2031 in the network address of the NAT device 1020 of the network address of this index service unit 2031 of record, port and correspondence in subindex service unit record sheet.If level is big by 1 unlike current index service unit, simultaneously the record of the index service unit corresponding with this NAT device 1020 not in the subindex service unit record sheet returns registration failure message; If in the network of NAT device control, do not return registration failure message.
Fig. 7 illustrates the index service device and sets up flow process, is used to illustrate that the base index service unit agency under the second layer NAT device uses broadcast mode to add the flow process of index service device.Top index service unit 2011 is furnished with global unique ip address, and this address and the port that service is provided are known service entrance in system, maybe can obtain by the method for system definition.First NAT device 1010 directly inserts global network, is the root NAT device.The first index service unit 2021 is deployed in the network of root NAT device 1010 controls; Second NAT device 1020 directly inserts the network of root NAT device 1010 controls, and the agency 2032 and second index service unit 2031, the first index service unit is deployed in the network of second NAT device, 1020 controls.NAT device is made amendment to the packet source, ground or the destination address of process, ignores the description of NAT device to the data packet modification among this figure.The idiographic flow that the index service device is set up below is described:
● first index service unit agency 2032 broadcasting in the network of second NAT device, 1020 controls comprises the message of index service plant network address and port, comprise the hierarchical information of being acted on behalf of the index service unit in the message, just the hierarchical information of the first index service unit.
● the message of broadcasting in the network of second NAT device, 1020 controls that comprises index service plant network address and port is monitored in the second index service unit 2031.
● the message that comprises index service plant network address and port is received in the second index service unit 2031, according to the level that provides in the message, after increasing one-level local hierarchical information is set, and initiate the application for registration message to the first index service unit 2021 according to the network address of the index service device that provides in the message and port, the network address, port, the default hierarchical information that comprise the second index service unit 2031 in this message show that promptly this index service unit 2031 is positioned at the beeline of the network of second NAT device, 1020 controls to global network.
● the first index service unit 2021 is according to the index service unit networks address of carrying in the conversion IP address of the packet of carrying this application for registration and this application for registration message, judges that this index service unit is whether in the network of NAT device control; If in the network of NAT device control, extract the hierarchical information in this register requirement, if level is bigger by 1 than current index service unit, then the message that succeeds in registration is returned to the second index service unit 2031 in the network address of the NAT device 1020 of the network address of this index service unit 2031 of record, port and correspondence in subindex service unit record sheet.If level is big by 1 unlike current index service unit, simultaneously the record of the index service unit of these NAT device 1020 correspondences not in the subindex service unit record sheet returns registration failure message; If in the network of NAT device control, do not return registration failure message.
The forwarding capability that do not give information is acted on behalf of in the first index service unit shown in Figure 7.If necessary, the developer is not difficult to develop the index server agency of forwards function.
In addition, this broadcast mode can use wired, wireless or wired and wireless etc. according to various service brokers network environment of living in.
In addition, with reference to figure 5, Fig. 6 and Fig. 7, according to the explanation of described specific embodiment, those of ordinary skills can realize the deployment of index service device in multi-level NAT network.
In addition, consider safety issue, can all encrypt or local cypher registration message.This safety issue all will consider in the various service units that constitute service end address acquisition system 10, its basic skills be in each service unit and the communication information between service unit all encrypt or local cypher.
Under root multi-level NAT network environment, server is basic identical to the reciprocal process of the network address of index service device 2001 requester network Service Sources and port to index service device 2001 registered network Service Sources and client.Fig. 8-Figure 11 has described this reciprocal process.The server of index of reference service unit client 9004 expression registered network Service Sources and the client of requester network Service Source among the figure, the service unit registration message or the service unit address request that simultaneously the server and client side are sent to index service device 2001 are referred to as service request information.
Fig. 8 is based on the known network address of index service device and port in the global network, and the index service client is used to illustrate that to the flow process of request of index service device or submission data index service device client obtains the service of index service device.Top index service unit 2011 is furnished with global unique ip address, and this address and the port that service is provided are known service entrance in system, maybe can obtain by the method for system definition.First NAT device 1010 directly inserts global network, is the root NAT device.The second base index service unit 2021 is deployed in the network of root NAT device 1010 controls; Second NAT device 1020 directly inserts the network of root NAT device 1010 controls, the 3rd base index service unit 2022 is deployed in the network of second NAT device, 1020 controls, and index service device client 9004 is deployed in the network of second NAT device, 1020 controls; NAT device is made amendment to the packet source, ground or the destination address of process, ignores the description of NAT device to the data packet modification among this figure.Idiographic flow is described below:
● the top index service unit 2011 of index service device client 9004 in being deployed in global network sends service request information;
● after service request information is received in top index service unit 2011, whether can carry out according to logic determines, if can carry out, return success message, if can not carry out, judge whether to be redirected to the subindex service unit, if can, return redirect message, otherwise return failed message; In this example, the redirect message that returns comprises the second base index service unit, 2021 network addresss and port message.
● index service device client 9004 is according to the network address and the port of the index service device that comprises in the redirect message, to the second base index service unit, the 2021 transmission service request information of index service device;
● after the second base index service unit 2021 is received service request information, whether can carry out according to logic determines, if can carry out, return success message,, judge whether to be redirected to the subindex service unit if can not carry out, if can, return redirect message, otherwise return failed message, the redirect message that returns in this example comprises the 3rd base index service unit 2022 network addresss and port message
● index service device client 9004 is sent out service request information according to the network address and the port of the index service device that comprises in the response message to the index service device;
● after the second base index service unit 2021 is received service request information, whether can carry out according to logic determines, if can carry out, return success message, if can not carry out, judge whether to be redirected to the subindex service unit, if can, return redirect message, otherwise return failed message.
Request message among Fig. 8 can be by wired or/and wireless receiving and dispatching.
Fig. 9 is index service plant network address and port based on this locality storage, and the index service client is to the flow process of request of index service device or submission data.This flow chart is the example that index service device client obtains the service of index service device.Top index service unit 2011 is furnished with global unique ip address, and this address and the port that service is provided are known service entrance in system, maybe can obtain by the method for system definition.First NAT device 1010 directly inserts global network, is the root NAT device.The second base index service unit 2021 is deployed in the network of root NAT device 1010 controls; Second NAT device 1020 directly inserts the network of root NAT device 1010 controls, the 3rd base index service unit 2022 is deployed in the network of second NAT device, 1020 controls, and index service device client 9004 is deployed in the network of second NAT device, 1020 controls; NAT device is made amendment to the source or the destination address of the packet of process, ignores the description of NAT device to the data packet modification among this figure.Idiographic flow is described below:
● index service device client 9,004 2022 service request information of the 3rd base index service unit in the network that is deployed in 1020 controls of second NAT device;
● after the 3rd base index service unit 2022 is received service request information, whether can carry out according to logic determines, if can carry out, return success message, if can not carry out, judge whether to be top index service unit, if, return failed message, if not, return the network address and port in the target index service device recording, return the redirect message that comprises the second base index service unit, 2021 network addresss and port in this example.
● index service device client 9004 is according to the network address and the port of the index service device that comprises in the response message, to 2021 service request information of the second base index service unit of index service device;
● after the second base index service unit 2021 is received service request information, whether can carry out according to logic determines, if can carry out, return success message, if can not carry out, judge whether to be top index service unit, if, return failed message, if not, return the network address and port in the target index service device recording, return the redirect message that comprises 2011 network addresss, top index service unit and port in this example.
● index service device client 9004 is sent out service request information according to the network address and the port of the index service device that comprises in the response message to the index service device;
● after service request information is received in top index service unit 2011, whether can carry out according to logic determines, if can carry out, return success message,, judge whether to be top index service unit if can not carry out, if, return failed message, if not, the network address and port in the target index service device recording returned.
Request message among Fig. 9 can be by wired or/and wireless receiving and dispatching.
Figure 10 is the basis for comprise index service plant network address and port by monitoring, and the index service client is to the flow process of request of index service device or submission data.This flow chart is the example that index service device client obtains the service of index service device.Top index service unit 2011 is furnished with global unique ip address, and this address and the port that service is provided are known service entrance in system, maybe can obtain by the method for system definition.First NAT device 1010 directly inserts global network, is the root NAT device.The second base index service unit 2021 is deployed in the network of root NAT device 1010 controls; Second NAT device 1020 directly inserts the network of root NAT device 1010 controls, the 3rd base index service unit 2022 is deployed in the network of second NAT device, 1020 controls, and index service device client 9004 is deployed in the network of second NAT device, 1020 controls; NAT device is made amendment to the packet source, ground or the destination address of process, ignores the description of NAT device to the data packet modification among this figure.Idiographic flow is described below:
● the broadcasting in the network of affiliated NAT control of the 3rd base index service unit 2022 comprises the message of index service plant network address and port;
● index service device client 9004 is monitored the broadcast of the message that comprises index service plant network address and port in the network of affiliated NAT control;
● index service device client 9004 is sent out service request information to the index service device receive the message that comprises index service plant network address and port that the 3rd base index service unit 2022 broadcasts in the network of affiliated NAT control after;
● after the 3rd base index service unit 2022 is received above-mentioned service request information, whether can carry out according to logic determines, if can carry out, return success message, if can not carry out, judge whether to meet condition from this service request to the index service device that transmit, if meet, then the index service device is transmitted this service request, if do not meet, transmit the condition of this service request to the index service device, judge whether to be redirected to the subindex service unit, if can, redirect message returned, otherwise return failed message, return the success message that comprises the service unit network address and port to index service device client 9004 in this example.
In addition, can use publicity, inform that mode such as user replaces, and is configured service client 9004 by artificial mode by the user in advance by the mode of forms of broadcasting issuing service inlet described in Figure 10.
Figure 11 is the basis for comprise index service plant network address and port by monitoring, and the index service client is to the flow process of request of index service device or submission data.This flow chart is the example that index service device client obtains the service of index service device.Top index service unit 2011 is furnished with global unique ip address, and this address and the port that service is provided are known service entrance in system, maybe can obtain by the method for system definition.First NAT device 1010 directly inserts global network, is the root NAT device.The second base index service unit 2021 is deployed in the network of root NAT device 1010 controls; Second NAT device 1020 directly inserts the network of root NAT device 1010 controls, second base index service unit agency 2023 is deployed in the network of second NAT device, 1020 controls, and index service device client 9004 is deployed in the network of second NAT device, 1020 controls; NAT device is made amendment to the packet source, ground or the destination address of process, ignores the description of NAT device to the data packet modification among this figure.Service function entity agency and between the agency service object privately owned communication interface can be arranged is used for the service function entity agency and by the information interaction between the agency service object.Ignore of the conversion of NAT routing device among this figure to the data grouping.
● second base index service unit agency 2023 is deployed in the message that broadcasting in the network of second NAT device, 1020 controls comprises index service plant network address and port;
● index service device client 9004 is monitored the broadcast of the message that comprises index service plant network address and port in the network of affiliated NAT control;
● after index service device client 9004 receives that the second base index service unit is acted on behalf of 2023 message of broadcasting that comprise index service plant network address and port in the network of affiliated NAT control, 2022 service request information of index service device;
● after the second base index service unit 2021 is received above-mentioned service request information, whether can carry out according to logic determines, if can carry out, return success message, if can not carry out, judge whether to meet condition from this service request to the index service device that transmit, if meet, then the index service device is transmitted this service request, if do not meet, transmit the condition of this service request to the index service device, judge whether to be redirected to the subindex service unit, if can, redirect message returned, otherwise return failed message, return the success message that comprises the service unit network address and port to index service device client 9 004 in this example.
The forwarding capability that do not give information is acted on behalf of in the second index service unit shown in Figure 11.If necessary, the developer is not difficult to develop the index server agency of forwards function.
In addition, in multi-level NAT network, the developer is not difficult to propose related procedure according to this flow process.The implementation of flow process can be wired or/and wireless.
In addition, can use publicity, inform that mode such as user replaces in advance by the mode of forms of broadcasting issuing service inlet described in Figure 11, service client is configured by artificial mode by the user, message in the index service device and related content see the following form 4.
Table 4 index service device allocation list
| Message name | Purpose | The message substance | Supplemental instruction |
| The network service resource registration message | Server is to index service device registration network service resource | The type of message sign, Internet resources title, the network address, port and hierarchical information | The Internet resources title is represented with URI or URL |
| Network service resource address lookup message | The client is to the address of index service device requester network Service Source | The type of message sign, Internet resources title, sender of the message's sign. | The string representation of Internet resources title is as URI or URL; If the response unit that has in the corresponding redirect message is added response unit information in this message. |
| Successful respond message | The person of sending returns success information to message, | The type of message sign, | For replying of " network service resource address lookup message ", comprise the network address and the port of network service resource.Successful respond message is a kind of of response message. |
| The failure response message | The person of sending returns failure information to message | The type of message sign, | For replying of " network service resource address lookup message ", comprise the network address and the port numbers of network service resource.The failure response message is a kind of of response message. |
| Redirect message | Return the network address and the port that also comprises the index service device to the message person of sending | The type of message sign; Answer the network address of index service unit; The network address and the port of (abbreviation response unit) index service device redirection target.(abbreviation redirection target) | For replying of " network service resource address lookup message ", can comprise the network address and the port that comprise network service resource.Redirect message is a kind of of response message. |
Figure 12 receives the processing method of the Service Source network address request message that Service Source registration message, client are sent out for the index service device.
S101 begins;
S102 waits for and receives data;
S103 judges whether to receive data, if do not receive data, changes S102; If the data of receiving are changeed S104;
S104 judges type of message, if be that " network service resource address lookup message " changes S110, if be that " network service resource registration message " changes S130, if non-above-mentioned message is changeed S120;
S130 extracts " network service resource registration message " content;
S131 judges whether the packet of carrying message passes through NAT device, and promptly whether Fen Zu source address is identical with the message person of the sending network address in the message, if identical commentaries on classics S133, if the different S134 that changes;
Whether the hierarchical information that S133 differentiates in the registration message is bigger by 1 than the level of current index service unit, if, change S134, if not, S135 changeed;
The content and the relevant information of S134 record Service Source registration message as the address of NAT device, and return success response message;
S135 differentiates in the network of this NAT device control whether the index service unit is arranged, if do not have, changes S136, if having, changes S137;
S136 returns the failure response message to sending out the request message person;
S137 is to sending out the network address and the port that the request message person returns the index service unit;
S110 " network service resource address lookup message " handling process (seeing Figure 16), and return S102;
S120 returns the failure response message to sending out the request message person.
Figure 13 is the flow chart of server process " network service resource registration message " reciprocal process.
S200 begins;
S201 is made as 0 with the number of attempt of transmitting apparatus registration message, and maximum attempts is set, and sets overtime control;
S202 sends out " network service resource registration message " to the index service device behind the network address that obtains the index service device and port, comprise the information such as resource name of the network address, port and the registration of service unit in the message at least, and number of attempt adds 1;
S203 wait acknowledge message;
S204 judges whether to receive data, if the data of receiving are changeed S208, if do not receive data, changes S205;
S205 judges whether overtime, if do not have overtimely, changes S203, if overtime, changes S206;
S206 judges whether number of attempt surpasses restriction; If do not surpass the number of attempt restriction, change S202, if surpass the number of attempt restriction, change S207;
S208 judges the type of receiving message, if " being redirected response message " changes S221, if " successful respond message " or " failure response message " changes S207;
S221 extracts the network address and the port of index service device in the response message, uses the network address of new index service device and the network address and the port that port is replaced original index service device.
The S207 end process.
The network service resource inquiry needs network service resource address correspondence table, sees Table 5;
The network service resource table of table 5 user terminal
| The network service resource network address | The network service resource port | The network service resource title |
| 10.23.0.128 | 11223 | URL/URI |
Figure 14 handles the flow chart of " network service resource address lookup message " reciprocal process for the network service resource inquiry, the Service Source requestor handles network service resource inquiry reciprocal process as follows behind the network address and port that obtain the index service device:
S300 begins
S301 initialization time-out time, initialization maximum attempts
The S302 number of attempt is initialized as 0
S303 is according to the record of target index service device, and to index service device hairnet network service resource address query messages, number of attempt adds 1
S304 wait acknowledge message;
Whether S305 receives data, if do not change S306, if commentaries on classics S320 is arranged;
Whether S306 is overtime, if change S307, if do not change S304;
Whether S307 surpasses the number of attempt restriction, if not changeing S309, if change S322;
The record of S322 searching request Service Source in the network service resource table is not if change S308, if commentaries on classics S323 is arranged
S323 extracts relevant record in the network service resource table;
S308 finishes
S309 initialization time-out time;
S310 is hairnet network service resource address query messages again, and number of attempt adds 1, returns S304;
The S320 type of message is judged, if " failed message " changes S322, if " successful respond message " changes S321,
If " being redirected response message " changes S312;
S321 extracts the network address and the port of network service resource in the message, to S308
S312 extracts the network address and the port of answering index service device, redirection target in the message;
S313 judges the network address and the port that whether has network service resource in the message, if commentaries on classics S314 is arranged, if do not change S316;
S314 extracts the network address and the port of network service resource in the message;
The network address, port and the resource name of S315 storage networking Service Source in the network service resource table substitute existing record if any relevant record;
S316 initialization time-out time, initialization maximum attempts;
The S317 number of attempt is initialized as 0;
S318 uses the network address of redirection target and the network address and the port in the record of port replacement target index service device, to index service device hairnet network service resource address query messages, if the network address of answering the index service device is arranged, then in message, comprise the network address of answering the index service device, number of attempt adds 1, returns S304.
Figure 15 is " network service resource address lookup message " handling process:
S8999 begins;
S9000 extracts " network service resource address lookup message " content;
S9001 carries the packet of message and whether passes through NAT device, if change S9005, if not changeing S9100;
S9100 judges whether this index service unit has the record that is requested service unit, if do not change S9110, if commentaries on classics S9101 is arranged;
S9101 returns the network address that comprises requested service unit and the successful respond message of port to sending out the request message person;
S9102 finishes.
Whether S9110 differentiates this index service unit is top index service unit, if not changeing S9120, if change S9111;
S9111 is after a request message person returns failed message, to S9102;
S9120 differentiates the network address of whether carrying the index service unit in this message, if not, change S9122, if change S9121;
S9121 is after a request message person returns failed message, to S9102;
S9122 returns to a request message person and comprises this index service unit, the network address of local target index service unit and the redirect message of port, and this index service unit is a response unit, and local target index service unit is a redirection target, to S9102;
S9005 differentiates in the network of this NAT device control whether the index service unit is arranged, if do not have, changes S9100, if having, changes S9200;
S9200 differentiates in the network service resource record sheet whether requested network service resource is arranged, if having, changes S9300, if do not have, changes S9201;
Whether S9201 differentiates this index service unit is top index service unit, if do not have, changes S9205, if having, changes S9202;
S9202 differentiates the network address of whether carrying the index service unit in this message, if do not have, changes S9204, if having, changes S9203;
S9203 is after a request message person returns failed message, to S9102;
S9204 returns the network address of the index service unit that comprises this index service unit, this NAT device correspondence and the redirect message of port to sending out the request message person, this index service unit is a response unit, the index service unit of this NAT device correspondence is a redirection target, to S9102;
S9205 differentiates the network address of whether carrying the index service unit in this message, if having, changes S9207, if do not have, changes S9206;
S9206 returns the redirect message that comprises top index service unit networks address and port to sending out the request message person, and top index service unit is a redirection target, to S9102;
Whether S9207 differentiates this network address and equates with the network address in the local target index server record, if equate, changes S9209, if unequal, changes S9208;
S9208 returns to a request message person and comprises this index service unit, the network address of local target index service unit and the redirect message of port, and this index service unit is a response unit, and local target index service unit is a redirection target, to S9102;
S9209 returns the network address of the index service unit that comprises this index service unit, this NAT device correspondence and the redirect message of port to sending out the request message person, this index service unit is a response unit, the index service unit of this NAT device correspondence is a redirection target, to S9102;
S9300 differentiates the network address of whether carrying the index service unit in this message, if, change S9302, if not, S9301 changeed
S9301 returns the index service unit that comprises this index service unit, this NAT device correspondence, is requested the network address of network service resource and the redirect message of port to sending out the request message person, this index service unit is a response unit, the index service unit of this NAT device correspondence is a redirection target, to S9102;
Whether S9302 differentiates this network address identical with local target index server record, if, change S9304, if not, S9303 changeed;
S9303 is after sending out the successful respond message that the request message person returns the network address that comprises requested service unit and port, to S9102;
S9304 returns the index service unit that comprises this index service unit, this NAT device correspondence, is requested the network address of network service resource and the redirect message of port to sending out the request message person, this index service unit is a response unit, the index service unit of this NAT device correspondence is a redirection target, to S9102.
For " network service resource address lookup message " handling process shown in Figure 15, the present invention proposes another preferred embodiment, and is as described below.
Index service device client need be with the index service unit of index service device interactive information repeatedly when the requester network resource.Because Service Source is registered in each index service unit, the global information of not maintenance service of index service device resource, the information in other index service unit is not known in the index service unit that receives query requests.Therefore content need be determined to answer according to the current state of index service unit in the index service unit that receives query requests.Current state comprises: index service cell position state, be requested the query requests direction of resource status, " network service resource address lookup message ".
Index service cell position state comprises: top index service unit, middle index service unit, bottom index service unit, independent top index service unit.Top index service unit is meant that this index service unit has only subordinate's subindex service unit, do not have higher level's index service unit; Middle index service unit is meant that there is subordinate's subindex service unit this index service unit, does not have higher level's index service unit; Bottom index service unit is meant that this unit does not have subordinate's subindex service unit, has only higher level's index service unit.Independent top index service unit is meant there is not the top index service of subindex service unit unit.
Being requested resource status comprises: be requested resource record in this index service unit, be not requested resource record in this index service unit.
The query requests direction of " network service resource address lookup message " comprising: whether this message is initial query message, is promptly sent, do not comprised in the message information of index service unit by the user; Query messages is promptly sent, is comprised in the message information of index service unit by the user.According to the information that comprises the index service unit in the query messages, the service unit of receiving query messages is with query messages and then be divided into upwards query messages, query messages downwards.Upwards query messages is meant that the index service unit in the message is the index service unit in the subindex service log table of this index service unit; Query messages is meant that the index service unit in the message is the index service unit in the target index server record of this index service unit downwards.The query messages direction is divided generally: initial query message, the query messages that makes progress, downward query messages.
Whether position, this index service unit according to the index service unit exist information such as being requested resource, query requests direction, receive that the index service unit of " network service resource address lookup message " can be answered by the combination of table 6.
Table 6 " network service resource address lookup message " is replied decision table
| Index service cell position state | Be requested resource status | The query requests direction | Return answer message | The answer message additional information |
| Top index service unit | Do not find | Initial query message | Redirect message, redirection target are the corresponding subindex service unit network address and port | The respondent is this index service unit networks address |
| Top index service unit | Do not find | Query messages makes progress | Failed message | |
| Top index service unit | Find | Initial query message | Redirect message, redirection target are the corresponding subindex service unit network address and port, the Service Source network address and port | The respondent is this index service unit networks address, |
| Top index service unit | Find | Query messages makes progress | Success message comprises the Service Source network address and port | |
| Intermediary service is single | Do not find | Initial query | Redirect message | Redirection target can be according to plan |
| Unit | Message | Slightly select: higher level's index service unit, subordinate index service unit, top index service unit | ||
| Middle index service unit | Do not find | Query messages makes progress | Redirect message, redirection target are the network address and the port in the local target index server record | The respondent is this index service unit networks address |
| Middle index service unit | Do not find | Downward query messages | Redirect message, redirection target are the corresponding subindex service unit network address and port | The respondent is this index service unit networks address |
| Middle index service unit | Find | Initial query message | Redirect message, redirection target are the corresponding subindex service unit network address and port, the Service Source network address and port | The respondent is this index service unit networks address |
| Middle index service unit | Find | Query messages makes progress | Success message comprises the Service Source network address and port | The respondent is this index service unit networks address |
| Middle index service unit | Find | Downward query messages | Redirect message, redirection target are the corresponding subindex service unit network address and port, the Service Source network address and port | The respondent is this index service unit networks address |
| Bottom index service unit | Do not find | Initial query message | Redirect message, redirection target are the network address and the port in the local target index server record | The respondent is this index service unit networks address |
| Bottom index service unit | Do not find | Downward query messages | Failed message | |
| Bottom index service unit | Find | Initial query message | Success message comprises the Service Source network address and port | |
| Independent top index service unit | Do not find | Query messages (initially) | Failed message | |
| Independent top index service unit | Find | Query messages (initially) | Success message comprises the Service Source network address and port |
Based on the above-mentioned decision table of replying, can use several different methods to produce answer message.Consider in the actual motion environment problems such as the message concurrency is big, processing speed.Adopt the mode of state encoding below, the initial conditions of every kind of situation is encoded.In the state space that three kinds of states are determined, the coding of any two kinds of situations is inequality.
Reply control table in each index service unit storage one " network service resource address lookup message ", the response message control code in the control table by indexing units location status position (index service cell position mode bit), be requested resource status position (resource status position), query messages direction mode bit and form (message direction position) etc. and form.Serve end program uses this to reply the generation of control table control response message.Redirected strategy is divided into higher level, subordinate, top.The higher level is the record of local target index server, and subordinate is the network address and the port of corresponding subindex service unit, the top network address and port for target index service mark index service unit.
Be response message control code encoding scheme below, this scheme is an example of response message control code encoding scheme.
Index service cell position state comprises: independent top index service unit (00), top index service unit (11), middle index service unit (01), bottom index service unit (10);
Be requested resource status: record (1) is arranged in this index service unit, do not write down (0) in this index service unit.
Query messages direction state: initial query message (00), the query messages (01) that makes progress, downward query messages (10).
Figure 16 is " network service resource address lookup message " handling process.
S9000: beginning;
S9001: the response message control code is carried out initialization, for example 00000;
S9002: computation index service unit location status obtains the location status coding; The use location state encoding is to " index service cell position mode bit " set in the response message control code, for example: carry out exclusive disjunction with current response message control code " index service cell position mode bit ";
S9004: read the request message content and be requested Service Source, calculate and be requested resource status, obtain being requested the resource status coding;
S9005: use the resource status coding: carry out exclusive disjunction with current response message control code " resource-niche " position to " resource-niche " set in the response message control code, for example;
S9006: check, read the respondent's information in the request message, calculate query messages direction state, obtain query messages direction state encoding;
S9007: use the message direction state encoding: carry out exclusive disjunction with current response message control code " message direction position " position to " message direction position " set in the response message control code, for example;
S9008: differentiate current response message control code and whether belong to " network service resource address lookup message " and reply the response message control code in the control table, change S9010, change S9009 if do not belong to if belong to;
S9009: return failed message to message initiator, change S9012;
S9010: reply control table by " network service resource address lookup message " and generate response message;
S9011: to message initiator echo reply message;
S9012: finish.
Reply decision table based on " network service resource address lookup message " in addition, the response message control code that " network service resource address lookup message " replys in the control table can use parallel mode to generate.
It should be noted that at last, above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, and on using, can extend to other modification, variation, application and embodiment, think that simultaneously all such modifications, variation, application, embodiment are within the spirit and scope of the present invention.
Claims (27)
1, the index service device of Service Source in a kind of same root multi-layer NAT network comprises:
Top index service unit, be connected with global network by top service bus device, the network address and the port of the Service Source in the network that record global network and the NAT device that directly is connected with global network are controlled, and the network address and the port of described Service Source are provided for subscriber equipment;
At least one base index service unit, be connected with corresponding private network by the service bus device, write down the network address and the port of the Service Source in other private networks that described private network and described private network extend downwards by NAT device, and the subscriber terminal equipment in other private networks that extend by NAT device for described private network and described private network provides the network address and the port of described Service Source downwards;
Wherein, the base index service unit layer index service unit that makes progress sends the register requirement application and adds described index service device, the packet of described register requirement is determined to carry through NAT device in index service unit, described upper strata, extract the hierarchical information in the described register requirement, if described base index service unit is the subindex service unit of index service unit, described upper strata, the registration of described base index service unit is finished in index service unit, described upper strata, if described base index service unit is not the subindex service unit of index service unit, described upper strata, index service unit, described upper strata returns the network address of the index service unit that comprises described NAT device correspondence and the response message of port.
2, the index service device of claim 1, wherein, if the level of described base index service unit is bigger by 1 than the level of index service unit, described upper strata, then described base index service unit is the subindex service unit of index service unit, described upper strata.
3, the index service device of claim 1, wherein, whether index service unit, described upper strata is identical according to the described base index service unit network address of carrying in the source address of the packet of described application for registration and the described application for registration message, judges whether the packet of carrying described register requirement passes through NAT device.
4, the index service device of claim 1, wherein, global network connects top index service unit, private network only connects a base index service unit, and described base index service unit can and insert a plurality of network service resources registrations in other private networks of described private network for the private network of its access.
5, the index service device of claim 1, wherein, index service unit, described upper strata can be top index service unit, also can be the base index service unit.
6, the index service equipment of Service Source in a kind of same root multi-layer NAT network comprises:
Storage medium, described storage medium is used for the described index service equipment mark of stored record, host address, port information and hierarchical information, described storage medium is used to store the direct upper strata of described index service equipment and the directly network address of lower floor's index service equipment and port information and the directly network address and the port information of lower floor's index service equipment mark and the direct corresponding NAT device of lower floor's index service equipment, and described storage medium is used for the network address and the port information of the network address, port, resource name and the corresponding NAT device of stores service resource;
Communication unit, described communication unit connects with the service bus device, is responsible for transceive data;
Logic control element, the reading in and writing out of the transmitting-receiving of described logic control element control data and data.
7, the index service equipment of claim 6 further comprises:
The hierarchical information record sheet is used to write down the hierarchical information of described index service equipment;
Target index service device recording table is used to write down the network address and the port information of ancestors' index service equipment of described index service equipment;
Subindex service unit record sheet is used to write down the network address and the port information of sign, the network address, port and corresponding NAT device of the subindex service equipment of described index service equipment;
Network service resource device recording table is used to write down the network address and the port information of the network address, port, resource name and the corresponding NAT device of Service Source;
The control table of network service resource address lookup acknowledgement messaging is used for the generation of the response message of Control Network service resource address query requests;
The index service logic control element, described index service logic control element is connected with described communication unit with described target index service device recording table, described subindex service unit record sheet, described network service resource device recording table respectively, and described target index service device recording table, described subindex service unit record sheet, described network service resource device recording table and described communication unit are carried out read-write operation; Described index service logic control element reads control information from the control table of network service resource address lookup acknowledgement messaging and generates response message; Described index service logic control element is connected with the hierarchical information record sheet, reads hierarchical information.
8, the index service equipment of claim 7, further comprise: the basic configuration information record sheet, described basic configuration information record sheet links to each other with described index service logic control element, is used to write down described index service device identification, host address and port information.
9, the index service register method of base index service unit in a kind of same root multi-layer NAT network, described method comprises:
Step 10), top index service unit begin to receive register requirement, and described base index service unit inserts private network by the service bus device, and upwards the layer index service unit sends register requirement;
Step 20), after whether the packet of determining to carry described register requirement when index service unit, described upper strata pass through NAT device, extract the hierarchical information in the described register requirement;
Step 30) if described base index service unit is the subindex service unit of index service unit, described upper strata, then the network address and the port of the NAT device of the network address of the described base index service unit of record, port, sign and correspondence in the subindex service unit record sheet of index service unit, described upper strata return success response message;
Step 40) if described base index service unit is not the subindex service unit of index service unit, described upper strata, then search the index service unit of described NAT device correspondence at the subindex service unit record sheet of index service unit, described upper strata, if the index service unit of described correspondence exists, return the network address of the index service unit that comprises described NAT device correspondence and the response message of port to the described base index service unit that proposes register requirement;
Step 50), after the described base index service unit that proposes register requirement extracts the network address and port in the described response message, send register requirement to the index service unit of described correspondence.
10, the method for claim 9, wherein, in the step 10), index service unit, described upper strata can be top index service unit, also can be the base index service unit.
11, the method for claim 9, wherein, step 20) further comprise: whether index service unit, described upper strata equates according to the described base index service unit network address of carrying in the source address of the packet of described application for registration and the described application for registration message, judges whether the packet of carrying described register requirement passes through NAT device.
12, the method for claim 9, wherein, step 30) further comprise: if the level of described base index service unit is bigger by 1 than the level of index service unit, described upper strata, then described base index service unit is the subindex service unit of index service unit, described upper strata.
13, the method for claim 9, wherein, global network connects top index service unit, private network only connects a base index service unit, and described base index service unit can and insert a plurality of network service resources registrations in other private networks of described private network for the private network of its access.
14, the system for obtaining service resource address in a kind of same root multi-layer NAT network comprises:
The described index service device of claim 3;
Top service bus device is connected with described global network with the top index service unit of described index service device respectively, and the index service device is inserted global network;
The service bus device is connected with private network with the base index service unit of described index service device respectively, and described index service device is inserted described private network;
Wherein, described index service device is after receiving the network service resource registration/network service resource request message of index service device client by described top index service bus unit or the transmission of described service bus device, whether can carry out according to logic determines, if can carry out, return the request success message; For described network service resource registration message, if can not carry out, and can be redirected, then return redirect message, described client re-registers; For described network service resource request message, if can not carry out, if and the index service unit that accepts request in the described index service device is not top index service unit, then return the redirect message of the network address and port in the target index service device recording that comprises described index service unit, described client resends request.
15, the system of claim 14, wherein, described index service device connects global network through top service bus device, uses the network address of global network to address, and becomes the part of described global network.
16, the system of claim 14, wherein, described index service device connects private network through the service bus device, uses the network address of private network to address, and becomes the part of the private network of described access.
17, the system of claim 14, wherein, in the described index service device, global network connects top index service unit, private network only connects a base index service unit, and described base index service unit can and insert a plurality of network service resources registrations in other private networks of described private network for the private network of its access.
18, the system of claim 14, wherein, described index service device client comprises subscriber computer and the service resource apparatus in global network and the private network.
19, the method for index service device client registered network Service Source in a kind of same root multi-layer NAT network comprises:
Step 10), described index service device client send the network service resource registration message to the index service device, and described registration message comprises the resource name of the network address, port and the registration of Service Source;
Step 20), the described index service device of receiving described service registry message judges whether described packet of carrying registration message passes through NAT device;
Step 30) if through NAT device, and if the level in the registration message bigger by 1 than the level of described index service unit, record comprises the network address of described NAT device, the described Service Source registration message of port, returns success registration message;
Step 40) if through NAT device, if and the level in the registration message is big by 1 unlike described index service unit level, when in the network of described NAT device control the index service unit being arranged, return the network address that comprises described index service unit and the redirect message of port to described client;
Step 50), described client extracts the network address of the described index service unit that returns and the network address and the port that port is replaced original index service device from described redirect message, send register requirement.
20, the method for claim 19, wherein, described index service device client comprises subscriber computer and the service resource apparatus in global network and the private network.
21, the method for claim 19, wherein, described index service unit can be top index service unit, also can be the base index service unit.
22, the method for claim 19, wherein, described method further comprises: described index service device client is set the number of attempt and the overtime control of register requirement of register requirement, if register requirement surpasses described number of attempt or the described overtime control of setting, finishes this request.
23, the method for claim 19, wherein, step 20) further comprise: whether source address and the network address of described client of described index service device by judging described registration message be identical, determines whether described registration message passes through NAT device.
24, the method for claim 19, wherein, step 20) further comprise: if described registration message does not pass through NAT device, the Service Source information of record registration message returns success response message.
25, the method for the requester network Service Source of index service device client in a kind of same root multi-layer NAT network comprises:
Step 10), described index service device client are judged the response message that has or not from the index service device, send network service resource address lookup message to described index service device then, described query messages comprises the Service Source title at least, when the response message that exists from described index service device, described query messages also comprises the respondent in the described response message;
Step 20), receive whether the index service unit judges self of the described index service device of described network service resource query messages exists requested described network service resource, will be requested resource status and be set at and find or do not find;
Step 30), the index service unit of receiving the described index service device of described network service resource query messages is determined to comprise self location status: independent top index service unit, top index service unit, middle index service unit, bottom index service unit;
Step 40), receive that the index service unit of described index service device of described network service resource query messages is according to the described respondent who comprises in the described query messages, determine query messages direction state: when not having described respondent in the message, be set at " initial query message "; When described respondent is a subindex service unit of receiving the described index service unit of described network service resource query messages, be set at " upwards query messages "; When described respondent is the index service unit of receiving in the target index server record of described index service unit of described network service resource query messages, be set at " query messages downwards ";
Step 50), receive described network service resource query messages described index service device the index service unit according to describedly be requested resource status, described self location status and described query messages direction state mates in following table, returns corresponding answer message;
26, the method for claim 25, wherein, in the step 10), described respondent is the index service unit that sends response message in the described index service device.
27, the method for claim 25, wherein, step 30) in, described top index service unit refers to that this index service unit has only subordinate's subindex service unit, do not have higher level's index service unit; The index service unit refers to that there is subordinate's subindex service unit this index service unit, does not have higher level's index service unit in the middle of described; Described bottom index service unit is meant that this index service unit does not have subordinate's subindex service unit, has only higher level's index service unit; The top index service of described independence unit is meant does not have the top index service of subindex service unit unit.
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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-
2008
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| US11438186B2 (en) | 2016-11-09 | 2022-09-06 | Cisco Technology, Inc. | Area-specific broadcasting using bit indexed explicit replication |
| US10985942B2 (en) | 2017-03-30 | 2021-04-20 | Cisco Technology, Inc. | Multicast traffic steering using tree identity in bit indexed explicit replication (BIER) |
| US10447496B2 (en) | 2017-03-30 | 2019-10-15 | Cisco Technology, Inc. | Multicast traffic steering using tree identity in bit indexed explicit replication (BIER) |
| US10432425B2 (en) | 2017-03-30 | 2019-10-01 | Cisco Technology, Inc. | Internet protocol based encapsulation for bit indexed explicit replication (BIER) |
| US10574479B2 (en) | 2017-04-28 | 2020-02-25 | Cisco Technology, Inc. | Bridging of non-capable subnetworks in bit indexed explicit replication |
| US11303470B2 (en) | 2017-04-28 | 2022-04-12 | Cisco Technology, Inc. | Bridging of non-capable subnetworks in bit indexed explicit replication |
| CN111464573B (en) * | 2019-01-21 | 2023-07-28 | 胡俊喜 | Network communication system, method and device for data forwarding across communication protocols |
| CN111464573A (en) * | 2019-01-21 | 2020-07-28 | 胡俊喜 | Network communication system, method and device for forwarding cross-communication protocol data |
| CN112929401A (en) * | 2019-12-06 | 2021-06-08 | 华为技术有限公司 | Registration method and device |
| CN112929401B (en) * | 2019-12-06 | 2023-12-19 | 华为云计算技术有限公司 | Registration method and device |
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