JP3959386B2 - Name resolution device, name resolution system, name resolution method, and name resolution program - Google Patents

Description

  The present invention relates to a name resolution device, a name resolution system, a name resolution method, and a name resolution program, and more particularly, when name resolution information to be registered in a name resolution server device is stored, for example, registered in a name resolution server device on the Internet The present invention relates to a name resolution device, a name resolution system, a name resolution method, and a name resolution program capable of performing the same name resolution.

  Conventionally, when a communication terminal device connected via a network performs name resolution of a communication terminal device connected to another network via the Internet, the host name and host of the communication terminal device connected to the other network The IP address corresponding to the name must be registered in the DNS server database on the Internet. For example, Non-Patent Document 1 discloses a conventional technique called DNS UPDATE that registers a host name and an IP address corresponding to the host name in a DNS server database. In addition, a conventional technique in which a DHCP (Dynamic Host Configuration Protocol) server disclosed in Non-Patent Document 2 allocates an IP address in response to a request from a communication terminal device and registers the IP address and the host name in the DNS server is realized. ing.

RFC 2136, “Dynamic Update in the Doamin Name System”, [online], [September 3, 2003 search], Internet <URL: http: // www. ietf. org /> RFC 2131, “Dynamic Host Configuration Protocol”, [online], [searched on September 3, 2003], Internet <URL: http: // www. ietf. org />

  In the related art of Non-Patent Document 1 and the related art related to Non-Patent Document 2, the DNS server and the DHCP server cooperate to reflect the IP address assigned by the DHCP server and the corresponding host name on the DNS server. it can. However, a linkage function between a DHCP server and a DNS server is necessary, and conventional communication devices that do not implement these functions and built-in communication terminal devices that do not have an IP address registration function to the name resolution server device are compatible. There was a problem that it was not possible.

  Also, when the network is an in-house LAN or a home LAN and the communication terminal device connected via the network performs name resolution of the communication terminal device connected to another network via the Internet, the other network It is necessary to acquire in advance the host name of the communication terminal device connected to the IP address and the IP address corresponding to the host name, or to search via a DNS server on the Internet. However, in order to register the host name and the IP address corresponding to the host name on the DNS server on the Internet, it is possible to register easily because of restrictions on the operation of Internet service providers, etc., and reduced security due to wide disclosure. There was a problem of not being.

  The present invention has been made to solve the above-mentioned problems caused by the prior art. In particular, the present invention stores name resolution information to be registered in the name resolution server device, for example, registered in the name resolution server device on the Internet. An object of the present invention is to provide a name resolution device, a name resolution method, and a name resolution program capable of performing name resolution similar to the time.

  In order to solve the above-described problems and achieve the object, a name resolution apparatus according to the present invention is provided between a communication terminal apparatus and a name resolution server apparatus that performs name resolution in response to a name resolution request from the communication terminal apparatus. When receiving a name resolution request of a name resolution server device that manages a certain domain from the communication terminal device, an identification name and address information of the name resolution device in response to the name resolution request The name resolution response generating means for generating the name resolution response including the name resolution response generating means for transmitting the name resolution response generated by the name resolution response generating means to the communication terminal apparatus, and the communication terminal apparatus arbitrarily A name registration request receiving means for receiving a name registration request for requesting the name resolution apparatus to register name resolution information including identification name and address information of the communication terminal device; Characterized in that it comprises a name resolution information storage means for storing name resolution information contained in the name registration request received by the name registration request receiving unit.

  According to the present invention, when a name resolution request of a name resolution server device managing a certain domain is received from a communication terminal device, a name resolution response including an identification name and address information of the name resolution device is sent to the name resolution request. A name registration request for transmitting the generated name resolution response to the communication terminal device, and requesting the name resolution information to be registered in the name resolution device by the communication terminal device including the identification name and address information of an arbitrary communication terminal device. Since the name resolution information included in the received name registration request is stored, the name resolution information to be registered in the name resolution server device is stored, for example, when it is registered in the name resolution server device on the Internet You can resolve the name as well.

The name resolution system according to the present invention includes a name resolution system comprising a communication terminal device and a name resolution device that mediates between a name resolution server device that performs name resolution in response to a name resolution request from the communication terminal device. The communication terminal device includes: a name resolution request transmission unit that transmits the name resolution request of a name resolution server device that manages a certain domain to the name resolution device; and the name resolution as a response to the name resolution request. Name resolution response receiving means for receiving a name resolution response including the identification name and address information of the device from the name resolution device, and registering name resolution information including the identification name and address information of an arbitrary communication terminal device in the name resolution device comprising a name registration request transmitting means for transmitting a name registration request for requesting, wherein the name resolution device, the serial communication terminal device, the name resolution service When receiving the name resolution request Bas device, and name resolution response generating means for generating the name resolution response to the name resolution request, the name resolution response generated by the name resolution response generation means, wherein and name resolution response transmission means for transmitting to the communication terminal device, the name registration request receiving means for receiving the name registration request sent by said name registration request transmitting means, the name registration received by the name registration request receiving unit and name resolution information storage means for storing the name resolution information contained in the request, characterized in that it comprises a.

  According to the present invention, the communication terminal device performs name resolution of the name resolution server device that manages a domain to which a certain communication terminal device belongs via the name resolution device, and the destination of the name resolution resolves the name of the communication terminal device. When the name resolution information registration request including the identification name and address information is transmitted and the name resolution device receives the name resolution request of the name resolution server device from the communication terminal device, the name resolution device responds to the name resolution request. Name resolution response including identification name and address information is generated, the generated name resolution response is transmitted to the communication terminal device, the transmitted registration request is received, and the name resolution information included in the received name registration request The name resolution information to be registered in the name resolution server device is stored, and for example, the name is registered in the same manner as when registered in the name resolution server device on the Internet. Resolution can be.

Further, the name resolution method according to the present invention is a name resolution method used for a name resolution apparatus that mediates between a communication terminal apparatus and a name resolution server apparatus that performs name resolution in response to a name resolution request from the communication terminal apparatus. When a name resolution request of a name resolution server device managing a certain domain is received from the communication terminal device, a name resolution response including an identification name and address information of the name resolution device in response to the name resolution request Generating the name resolution response to the communication terminal apparatus, and the name resolution information including the identification name and address information of an arbitrary communication terminal apparatus by the communication terminal apparatus. a step of receiving the name registration request to register request, a step of storing the name resolution information contained in the received name registration request by the name registration request receiving unit, Characterized in that I do.

  According to the present invention, the communication terminal device performs name resolution of the name resolution server device that manages the domain to which a certain communication device belongs via the name resolution device, and the name resolution device issues a name resolution request to the name resolution server. If the request is a device name resolution request, a name resolution response including an identification name and address information of the name resolution device is generated and responded to the name resolution request, and the communication terminal device is the destination of the response. The name resolution information including the identification name and address information is requested to be registered, and the name resolution device receives the registration request and stores the name resolution information included in the registration request. Name resolution information is stored, and name resolution can be performed in the same manner as when registered in a name resolution server device on the Internet, for example.

  Further, the name resolution program according to the present invention is a name resolution program used in a name resolution apparatus that mediates between a communication terminal apparatus and a name resolution server apparatus that performs name resolution in response to a name resolution request from the communication terminal apparatus. When a name resolution request of a name resolution server device that manages a certain domain is received from the communication terminal device, the name resolution including the identification name and address information of the name resolution device in response to the name resolution request Name registration that generates a response, sends the name resolution response to the communication terminal device, and the communication terminal device requests the name resolution device to register name resolution information including the identification name and address information of an arbitrary communication terminal device When receiving a request, storing name resolution information included in the received name registration request, and receiving a name resolution request from the communication terminal device, the name resolution request If the name resolution information corresponding to the above is already stored, the stored name resolution information is returned, and if not stored, the name resolution request is inquired of the name resolution server device. The computer is caused to execute a procedure for responding.

  According to the present invention, when a name resolution request of a name resolution server device that manages a certain domain is received from a communication terminal device, a name resolution response including the identification name and address information of the name resolution device in response to the name resolution request A name resolution response is transmitted to the communication terminal device, and the communication terminal device receives a name registration request for requesting the name resolution device to register name resolution information including the identification name and address information of an arbitrary communication terminal device, Stores the name resolution information included in the received name registration request, and when the name resolution request is received from the communication terminal device, if the name resolution information corresponding to the name resolution request is already stored, the stored name If the resolution information is returned and it is not stored, the name resolution request is returned as the result of querying the name resolution server device. Storing name resolution information to be registered in the location, for example name resolution as if registered in the name resolution server device on the Internet.

  According to the present invention, when a name resolution request of a name resolution server device managing a certain domain is received from a communication terminal device, a name resolution response including an identification name and address information of the name resolution device is sent to the name resolution request. A name registration request for transmitting the generated name resolution response to the communication terminal device, and requesting the name resolution information to be registered in the name resolution device by the communication terminal device including the identification name and address information of an arbitrary communication terminal device. Since the name resolution information included in the received name registration request is stored, the name resolution information to be registered in the name resolution server device is stored, for example, when it is registered in the name resolution server device on the Internet It has the effect of being able to perform name resolution in the same way.

  According to the present invention, a communication terminal device performs name resolution of the name resolution server device that manages a domain to which a certain communication terminal device belongs via a name resolution device, and a communication terminal at a destination where the name has been resolved. When the name resolution information registration request including the identification name and address information of the device is transmitted and the name resolution device receives the name resolution request of the name resolution server device from the communication terminal device, the name resolution is performed in response to the name resolution request. A name resolution response including the device identification name and address information is generated, the generated name resolution response is transmitted to the communication terminal device, the transmitted registration request is received, and the name included in the received name registration request Since the resolution information is stored, the name resolution information to be registered in the name resolution server device is stored, for example, the same as when registered in the name resolution server device on the Internet. An effect that can name resolution.

  Further, according to the present invention, the communication terminal device performs name resolution of the name resolution server device that manages the domain to which a certain communication device belongs via the name resolution device, and the name resolution device receives the name resolution request as the name resolution request. If the request is a name resolution request of the resolution server device, a name resolution response including the identification name and address information of the name resolution device is generated and responded to the name resolution request, and the communication terminal device performs communication at the destination of the response Registration request is made for name resolution information including the identification name and address information of the terminal device, and the name resolution device is configured to receive the registration request and store the name resolution information included in the registration request. The name resolution information to be stored is stored, and for example, name resolution can be performed in the same manner as when registered in the name resolution server device on the Internet.

  Further, according to the present invention, when a name resolution request of a name resolution server device that manages a certain domain is received from a communication terminal device, the name including the identification name and address information of the name resolution device in response to the name resolution request Generate a resolution response, send a name resolution response to the communication terminal device, and receive a name registration request for requesting the name resolution device to register name resolution information including the identification name and address information of any communication terminal device The name resolution information included in the received name registration request is stored, and when the name resolution request is received from the communication terminal device, the name resolution information corresponding to the name resolution request is stored. Name resolution information is returned, and if it is not stored, the name resolution request is sent to the name resolution server device. Storing name resolution information to be registered in over server device, an effect that it is name resolution similar to the example when the registered name resolution server device on the Internet.

  Exemplary embodiments of a name resolution apparatus according to the present invention will be explained below in detail with reference to the accompanying drawings. In the first embodiment, the case where the name resolution device according to the present invention registers and discloses the host name and IP address of the communication terminal device in the DNS server device connected via the Internet, and in the third embodiment, A case will be described in which the name resolution apparatus according to the present invention registers the host name and IP address of a communication terminal apparatus in a name registration server apparatus connected via the Internet, and further registers and discloses it in a DNS server apparatus. In the third embodiment, the name resolution device according to the present invention transmits a name resolution request of the communication terminal device to the DNS server device, and the host name included in the name resolution response of the DNS server device in response to the name resolution request. A case where the IP address is changed to its own host name and IP address and transmitted to the communication terminal device will be described. In the fourth embodiment, a computer system that executes a name resolution program according to the present invention will be described. Finally, various modifications will be described as other embodiments.

(Embodiment 1)
First, two features of the name resolution apparatus according to the first embodiment, that is, name registration of the local node using DNS UPDATE and external name registration of the local node will be described. FIG. 1 is a diagram illustrating local node name registration using DNS UPDATE of the name resolution apparatus according to the first embodiment. FIG. 2 is a diagram for explaining external name registration of the local node of the name resolution device according to the first embodiment. Note that the communication device and the network shown in the first embodiment are compatible with IPv6 and assume a communication environment in which end-to-end communication is possible. For example, the network is assumed to be a home LAN as well as a corporate LAN.

  First, as shown in FIG. 1, the local node 10 assigns the host name and the IP address corresponding to the host name to a certain domain when the host name or the corresponding IP address is given to the interface of the local node 10 or is updated. It is set to run DNS UPDATE to register with a DNS server assigned to manage. Then, the local node 10 checks the IP address of the DNS server assigned to manage a certain domain in order to execute DNS UPDATE. For this purpose, a name resolution request for a DNS server assigned to manage a certain domain is generated, and the name resolution request is transmitted to the name resolution device 12 set as the DNS server of the local node 10. The name resolution request is a request for searching for an IP address by giving the host name of the communication partner to the DNS server in order to know the IP address of the communication partner.

  When the name resolution device 12 receives the name resolution request from the local node 10, the name resolution device 12 identifies that the name resolution request is for the DNS server assigned to manage the domain having the received name resolution request, and receives the received name. In response to the resolution request, a name resolution response including its own host name and IP address is generated and transmitted to the local node 10.

  The local node 10 identifies that the host name and IP address of the name resolution response received from the name resolution device 12 are the host name and IP address of the name resolution device 12, and manages the domain in which the name resolution device 12 is located. Recognizing that the DNS server is assigned to the server, a name registration request for requesting registration of name resolution information including the host name of the local node 10 and the IP address corresponding to the host name is transmitted to the name resolution device 12 again. . Then, the name resolution device 12 receives the name registration request transmitted from the local node 10, acquires the name resolution information including the host name of the local node 10 and the IP address corresponding to the host name from the name registration request, and performs name resolution Information is registered and stored in the name resolution information storage unit.

  As shown in FIG. 2, the name resolution device 12 also includes the host name and host name of any local node 10 selected by the user from the name resolution information of the local node 10 held in the name resolution information storage unit. The IP address corresponding to is registered in the DNS server 14 on the Internet and made public. The name resolution device 12 requests registration and publication using a protocol appropriate for the DNS server 14, for example, DNS UPDATE or HTTP protocol.

  As described above, in the first embodiment, when a name resolution request for the DNS server device 14 assigned to manage a certain domain is received from the local node 10, the host name of the host system is received in response to the name resolution request. And a name resolution response including the IP address corresponding to the host name is generated and transmitted to the local node 10, and the local node 10 transmits to the name resolution device 12 based on the address information of the name resolution device 12 included in the name resolution response. Since the name resolution information is obtained from the name registration request for requesting the registration of the name resolution information including the host name of the local node 10 and the address information corresponding to the host name, the local node is utilized by using the DNS UPDATE function. Ten host names and corresponding IP addresses can be registered. Therefore, name resolution information to be registered in the name resolution server device is stored, and for example, name resolution can be performed in the same manner as when registered in the name resolution server device on the Internet.

  In the first embodiment, when the name resolution device 12 receives a name resolution request from the local node 10, it generates a name resolution response including its own host name and IP address in response to the received name resolution request. A case of transmitting to the local node 10 will be described. However, as indicated by a broken line in FIG. 1, when the name resolution device 12 receives a name resolution request from the local node 10, the name resolution request is transmitted to the DNS server 14, and the DNS server 14 responds to the transmitted name resolution request. The DNS server host name assigned to manage a domain included in the name resolution response and the IP address corresponding to the host name are changed to the own host name and the IP address corresponding to the host name, and sent to the local node. Applicable when This case will be described in detail in Embodiment 3.

  Also, since the host name selected from the name resolution information and the address information corresponding to the host name are registered in the DNS server device 14 connected via the network and requested to be disclosed, DNS on the Internet is requested. It is possible to register with the server, and to access the local node 10 connected to the LAN from the Internet.

  Next, the configuration of the name resolution system according to the first embodiment will be described. FIG. 3 is a functional block diagram showing the configuration of the name resolution system according to the first embodiment. As shown in the figure, the name resolution system includes communication terminal devices 10, 10 a and 10 b, a name resolution device 12 connected to the communication terminal devices 10, 10 a and 10 b via the network 11, and a network 13. It has a DNS server device 14 connected to the name resolution device 12.

  The network 11 is a network such as a LAN that performs communication according to the IPv6 protocol, and specifically, is a corporate LAN, a home LAN, or the like. The network 13 is a wide area network that performs communication according to the IPv6 protocol, and specifically, the Internet.

  The DNS server device 14 is a domain name system server that performs name resolution based on the name resolution request of the name resolution device 12 connected via the network 13 and transmits a name resolution response to the name resolution device 12. Further, the host name selected by the user from the name resolution information held in the name resolution device 12 based on the external registration request of the name resolution device 12 and the IP address corresponding to the host name are registered and released on the Internet.

  The communication terminal devices 10, 10a, and 10b are communication devices connected to the name resolution device 12 via a network, and specifically, are personal computers, network cameras, and the like. The communication terminal devices 10, 10 a, and 10 b include an interface unit 101, an input unit 102, a display unit 103, and a control unit 104.

  The interface unit 101 is a network interface that communicates with the name resolution device 12 via the network 11. The input unit 102 is an input device for inputting name resolution information such as a host name of the communication terminal device 10 and an IP address corresponding to the host name, and data such as user requests and instructions. , Mouse or operation buttons. The display unit 103 is an output device that displays name resolution information and the like held by the name resolution device 12, and is specifically an image display device such as an LCD.

  The control unit 104 is a control unit that controls the communication terminal device 10 as a whole, and includes a name resolution request generation unit 104a and a name registration request generation unit 104b. The name resolution request generation unit 104a is a processing unit that generates a name resolution request for requesting the name resolution device 12 for name resolution. The name registration request generation unit 104b is a processing unit that generates a name registration request for requesting the name resolution device 12 to register name resolution information including a host name and an IP address corresponding to the host name.

  The name resolution device 12 includes an internal interface unit 121, an external interface unit 122, an input unit 123, a display unit 124, a storage unit 125, and a control unit 126. The internal interface unit 121 is a network interface that communicates with the communication terminal devices 10, 10 a, and 10 b via the network 11. The external interface unit 122 is a network interface that communicates with the DNS server device 14 via the network 13.

  The input unit 123 is an input device that inputs data such as user requests, instructions, or name resolution information. Specifically, the input unit 123 is an input device such as a keyboard or a mouse, and the display unit 124 is a request input by the user. , An output device that outputs data such as instructions or name resolution information, specifically, an image display device such as a CRT (Cord Ray Tube) or LCD (Liquid Crystal Display).

  The storage unit 125 is a storage device such as an HDD (Hard Disk Drive), and includes a name resolution information storage unit 125a and a DNS server device table 125b. The name resolution information storage unit 125 a is a database in which name resolution information of the communication terminal devices 10, 10 a and 10 b connected via the network 11 is registered. The DNS server device table 125 b is a table that holds the host name of the DNS server device 14 connected via the network 13 and the IP address corresponding to the host name. Here, an example of the name resolution information storage unit 125a of the name resolution device 12 shown in FIG. 3 will be described. FIG. 4 is a diagram illustrating an example of the name resolution information storage unit 125a of the name resolution device 12 illustrated in FIG.

  As shown in the figure, the name resolution information storage unit 125a includes the host name of the communication terminal device 10, the MAC address, the IP address, the presence / absence of external registration (O, X), and the detection time. Since the IP address assigned to the communication terminal device 10 changes from moment to moment, it is associated with the detection time. An IP address selected by the user and externally registered in the DNS server device 14 is indicated by “◯”, and an IP address not externally registered in the DNS server device 14 is indicated by “x”.

  Returning to the description of FIG. 3, the control unit 126 includes a name resolution packet distribution unit 126a, a name resolution unit 126b, and a name registration unit 126c. The name resolution packet distribution unit 126a is a processing unit that identifies the name resolution packet received by the internal interface unit 121 or the external interface unit 122 as a name resolution request and a name registration request and distributes them to an appropriate processing unit. If a name resolution request is received, the name resolution unit 126b is assigned. If a name registration request is received, the name resolution unit 126c is assigned. In this case, even when the name resolution packet is a request for updating or deleting name resolution information such as an IP address corresponding to the host name, it is distributed to the name registration unit 126c.

  The name resolution unit 126b is a processing unit that performs name resolution based on the name resolution request received by the internal interface unit 121 or the external interface unit 122, and includes an external name resolution unit 126b1, a name resolution response generation unit 126b2, and a name resolution And an information search unit 126b3. The external name resolution unit 126b1 is a processing unit that inquires of the DNS server device 14 about the name resolution request distributed by the name resolution packet distribution unit 126a.

  Specifically, when the name resolution request received from the communication terminal device 10, 10 a or 10 b is to resolve the name of the DNS server device 14, the external name resolution unit 126 b 1 sends the name resolution request to the DNS server device. 14 to obtain a name resolution response from the DNS server device 14. If the name resolution information corresponding to the name resolution request is not stored in the name resolution information storage unit 125a, the external name resolution unit 126b1 inquires the DNS server unit 14 for the name resolution request, thereby The name resolution response is acquired from 14.

  When the name resolution response generator 126b2 receives a name resolution request of the DNS server device 14 that manages a certain domain from the communication terminal device 10 or 10a, 10b, the name resolution response generator 126b2 It is a processing unit that generates a name resolution response including address information. In addition, the name resolution response generation unit 126b2 generates a name resolution response in which the identification name and address information included in the name resolution response are replaced with the identification name and address information of the name resolution device 12. The name resolution response generator 126b2 generates a name resolution response including the name resolution information searched by the name resolution information search unit 126b3.

  The name resolution information search unit 126b3 is a search unit that searches the name resolution information stored in the name resolution information storage unit 125a based on the name resolution request. Specifically, when the name resolution information corresponding to the name resolution request is stored in the name resolution information storage unit 125a, the name resolution information search unit 125b3 determines that the name resolution information search unit 125a is based on the name resolution request. The name resolution information stored in the name resolution information storage unit 125a is searched.

  The name registration unit 126c acquires the name resolution information of the communication terminal device 10 or 10a, 10b from the name registration request transmitted by the communication terminal device 10, stores the name resolution information in the name resolution information storage unit 125a, and the name resolution information storage unit A processing unit that requests registration of the host name selected by the user from the name resolution information stored in 125a and the IP address corresponding to the host name in the DNS server device 14 on the Internet, and an external name registration selection unit 126c1 And an external name registration request unit 126c2.

  If the IP address of the name resolution information is a link local scope IPv6 address, the name registration unit 126c generates a global scope address using the IPv6 network prefix included in the routing packet notified to the network. ,sign up. A link local scope address is an address that is valid only within the same LAN, and a global scope address is an address that is valid for the entire Internet. The IPv6 network prefix refers to the upper 64 bits of the IPv6 address and represents the network address. Therefore, if the IP address of the name resolution information is a link local scope IPv6 address, the IPv6 network prefix (upper 64 bits) included in the routing packet notified to the network and the link local scope IPv6 address (lower 64 bits) can be synthesized to generate a global scope address (128 bits).

  The external name registration selection unit 126c1 is a selection unit that selects an arbitrary host name and an IP address corresponding to the arbitrary host name from the name resolution information stored in the name resolution information storage unit 125a. Is a user interface that allows the user to select an arbitrary host name and an IP address corresponding to the arbitrary host name from the name resolution information stored in the name resolution information storage unit 125a. The external name registration request unit 126c2 is a request unit that requests the DNS server device 14 to register the host name selected via the external name registration selection unit 126c1 and the IP address corresponding to the host name. The external name registration request unit 126c2 requests external registration using a protocol appropriate for the DNS server device 14, for example, DNS UPDATE or HTTP protocol. Here, as an example of the external name registration selection unit 126c1, an example of a user interface of name resolution information of the name resolution device 12 illustrated in FIG. 3 will be described. FIG. 5 is a diagram showing an example of a user interface of name resolution information of the name resolution device 12 shown in FIG.

  As shown in the figure, the user interface includes columns of a host name, an IP address, a MAC address, an update date, and Internet registration. If the user interface host name is blank, it is registered by the user. When the Internet registration field is clicked by the user, the name registration unit 126c updates the name resolution information in the name resolution information storage unit 125a, and the external name registration request unit 126c2 displays the Internet registration field clicked by the user. An IP address corresponding to the host name is registered in the DNS server device 14 and requested to be disclosed on the Internet.

  Next, the name resolution packet distribution procedure of the name resolution device 12 shown in FIG. 3 will be described. FIG. 6 is a flowchart showing a name resolution packet distribution procedure of the name resolution device 12 shown in FIG. As shown in the figure, the communication terminal apparatus 10 generates a name resolution packet and transmits it to the name resolution apparatus 12 (step S601). The name resolution packet includes a name resolution request, a name registration request, a name update request, a name deletion request, and the like, and these are collectively referred to as a name resolution packet.

  Then, the name resolution packet distribution unit 126a checks whether or not the name resolution packet received from the communication terminal device 10 is a name resolution request (step S602). As a result, if the name resolution packet is a name resolution request (Yes at step S602), the name resolution packet is distributed to the name resolution unit 126b, and the name resolution unit 126b performs name resolution (step S603).

  On the other hand, if the name resolution packet is not a name resolution request (No at step S602), the name resolution packet is distributed to the name registration unit 126c, and the name registration unit 126c performs name registration (step S604). In this case, even if the name resolution packet is a request for updating or deleting name resolution information such as a host name or a corresponding IP address, it is distributed to the name registration unit 126c. Then, the name resolution device 12 transmits a response to the name resolution packet, that is, a name resolution response or a name registration response (step S605).

  Next, the name resolution procedure of the name resolution device 14 shown in FIG. 3 will be described. FIG. 7 is a flowchart showing the name resolution procedure of the name resolution device 14 shown in FIG. By the way, the communication terminal device 10 assigns the host name and the IP address corresponding to the host name to the interface of the communication terminal device 10 or updates the IP address corresponding to the host name and the host name when updated. DNS UPDATE is set to be executed for registration. Then, the name resolution request generation unit 104a of the communication terminal apparatus 10 checks the host name of the DNS server apparatus assigned to manage a certain domain for executing DNS UPDATE and the IP address corresponding to the host name. For this purpose, a name resolution request is generated for the DNS server apparatus assigned to manage a certain domain, and the interface unit 101 transmits the name resolution request to the name resolution apparatus 12 set as the DNS server apparatus of the communication terminal apparatus 10. .

  However, not all of the name resolution requests received from the communication terminal apparatus 10 are for executing DNS UPDATE. Therefore, as shown in the figure, first, the name resolution unit 126b of the name resolution device 12 acquires the name resolution request distributed by the name resolution distribution unit 126a (step S701), and the acquired name resolution request is received. It is checked whether or not the request is a name resolution request for a DNS server apparatus assigned to manage a certain domain (step S702).

  As a result, in the case of a name resolution request for the DNS server device assigned to manage the domain having the acquired name resolution request (Yes in step S702), the name resolution response generation unit 126b2 has its own host for the name resolution request. A name resolution response including an IP address corresponding to the name and the host name is generated and transmitted to the communication terminal device 10 (step S703).

  On the other hand, if it is not a name resolution request for the DNS server device assigned to manage the domain with the acquired name resolution request (No at step S702), the name resolution information search unit 126b3 of the name resolution device 12 stores the name resolution information storage. The name resolution information of the communication terminal devices 10, 10a and 10b held in the unit 125a is searched (step S704), and it is checked whether or not there is corresponding name search information (step S705). As a result, when there is corresponding name resolution information (Yes at Step S705), the name resolution response generation unit 126b2 acquires the corresponding name resolution information (Step S706), and sends a name resolution response including the acquired name resolution information. Generate (step S707).

  On the other hand, when there is no corresponding name resolution information (No at Step S705), the external name resolution unit 126b1 transmits a name resolution request to the DNS server device 14 of the DNS server device table 125b (Step S708). Then, the name resolution response generation unit 126b2 receives the name resolution response from the DNS server device 14 (step S709).

  Next, the name registration / update / deletion procedure shown in FIG. 7 will be described. FIG. 8 is a flowchart showing the name registration / update / deletion procedure shown in FIG. By the way, the name registration request generation unit 104b of the communication terminal device 10 corresponds to the host name of the name resolution response received from the name resolution device 12 and the IP address corresponding to the host name corresponding to the host name and host name of the name resolution device 12. A name that identifies the IP address, recognizes that the name resolution device 12 is a DNS server device assigned to manage a certain domain, and includes the host name of the communication terminal device 10 and the IP address corresponding to the host name A name registration request or a name update request for requesting registration of resolution information is generated, and the interface unit 101 transmits a name registration request to the name resolution device 12.

  However, all of the name registration / update requests received from the communication terminal apparatus 10 are not for executing DNS UPDATE. Therefore, as shown in the figure, the name registration unit 126c of the name resolution device 12 acquires the name registration / update / deletion request of the communication terminal device distributed by the name resolution distribution unit 126a (step S801). It is checked whether the acquired name registration / update / deletion request is a name registration request or a name update request (step S802).

  As a result, when the acquired name registration / update / deletion request is a name registration request or a name update request (Yes at step S802), the name registration unit 126c determines the name resolution information of the communication terminal device 10 from the acquired name registration request. And is registered / held in the name resolution information storage unit 125a (step S803). On the other hand, if the acquired name registration / update / deletion request is not a name registration request or a name update request, that is, if it is a deletion request (No at step S802), the name registration unit 126c deletes the corresponding name resolution information. (Step S804).

  As described above, in the first embodiment, when the name resolution request of the DNS server apparatus 14 that manages a certain domain is received from the communication terminal apparatus, the host name of the name resolution apparatus 12 and the name resolution request are received in response to the name resolution request. A name resolution response including an IP address is generated, and the generated name resolution response is transmitted to the communication terminal device 10 or 10a, 10b. The communication terminal device 10 or 10a, 10b is configured to receive the host name and IP of an arbitrary communication terminal device. Since the name registration request for requesting registration of the name resolution information including the address to the name resolution device 12 is received and the name resolution information included in the received name registration request is stored, it should be registered in the DNS server device 14. Name resolution information is stored and name resolution can be performed in the same manner as when registered in the DNS server device 14 on the Internet, for example.

  Further, since the name resolution information search unit 126b3 searches the name resolution information stored in the name resolution information storage unit 125a based on the name resolution request, the name resolution information corresponding to the name resolution request is the name resolution information. If stored in the storage unit 125a, the name resolution information search unit 126a3 searches the name resolution information stored in the name resolution information storage unit 125a based on the name resolution request, and the name resolution response generation unit 126b2 It is possible to generate a name resolution response including the name resolution information searched by the resolution information search unit 126b3. Therefore, the name resolution of the communication terminal device 10 or 10a, 10b connected via the network can be performed based on the name resolution request of the communication terminal device 10 or 10a, 10b.

  In addition, when the name resolution information corresponding to the name resolution request is not stored in the name resolution information storage unit 125a, the external name resolution unit 126b1 inquires of the DNS server unit about the name resolution request, thereby causing the external name resolution unit 126b1 to A name resolution response can be obtained. Therefore, name resolution can be performed in the same manner as when registered in the DNS server device 14 on the Internet.

  Next, an external registration procedure of the name resolution device shown in FIG. 3 will be described. FIG. 9 is a flowchart showing an external registration procedure of the name resolution apparatus shown in FIG. As shown in the figure, the external name registration request unit 126c2 of the name resolution device 12 externally registers the host name selected from the name resolution information storage unit 125a by the user and the IP address corresponding to the host name in the DNS server device 14. It requests | requires to do (step S901). The external name registration request unit 126c2 requests external registration from the DNS server device 14 using an appropriate protocol, for example, DNS UPDATE or HTTP protocol.

  Then, the external name registration request unit 126c2 makes an external registration request by clicking on the Internet registration field as shown in FIG. At the same time, the name registration unit 126c updates the corresponding column of the name resolution information storage unit shown in FIG. 4 (step S902). Specifically, the host name, MAC address, IP address, external registration, and detection time are written.

  Further, the DNS server device 14 receives and registers the host name and the IP address corresponding to the host name from the name resolution device 12, and publishes them on the Internet (step S903). Then, the DNS server device 14 transmits an external registration response indicating that the host name and the IP address corresponding to the host name have been registered to the name resolution device 12 (step S904).

  As described above, in the first embodiment, the external name registration selection unit 126c1 has an arbitrary host name and an IP address corresponding to an arbitrary host name among the name resolution information stored by the name resolution information storage unit 125a. And the external name registration request unit 126c2 requests the DNS server device 14 to register the host name selected by the external name registration selection unit 126c1 and the IP address corresponding to the host name. It can be registered in the DNS server device 14 on the Internet. Therefore, it is possible to access a communication terminal device connected via LAN from the Internet.

(Embodiment 2)
By the way, in Embodiment 1, the case where the name resolution device 12 according to the present invention registers and discloses the host name and IP address of the communication terminal device 10 in the DNS server device 14 connected via the Internet has been described. The present invention is not limited to this, and the name resolution server 12 according to the present invention is a name registration server device in which the host name of the communication terminal device 10 and the IP address corresponding to the host name are connected via the Internet. The present invention can be applied to the case of registering and further registering and publishing to the DNS server device 14. In the second embodiment, the name resolution device 12 according to the present invention registers the host name of the communication terminal device 10 and the IP address corresponding to the host name in the name registration server device connected via the Internet, and A case of registration and disclosure in the DNS server device 14 will be described. In the second embodiment, only differences from the first embodiment will be described.

  First, the configuration of the name resolution system according to the second embodiment will be described. FIG. 10 is a functional block diagram showing the configuration of the name resolution system according to the second embodiment. As shown in the figure, a name registration server device 15 is connected to a name resolution device 12 via the Internet 13. The name registration server device 15 registers a host name selected from the name resolution information held in the name resolution information storage unit 125a based on an external registration request from the name resolution device 12 and an IP address corresponding to the host name. It is.

  Next, an external registration procedure of the name resolution device 12 shown in FIG. 10 will be described. FIG. 11 is a flowchart showing an external registration procedure of the name resolution device 12 shown in FIG. As shown in the figure, the difference from the external registration procedure of FIG. 9 is only after step S1103, and before that is the same. That is, the name registration server device 15 receives and registers the host name and the IP address corresponding to the host name from the name resolution device 12 (step S1103), and is further connected to the name registration server device 15 via the Internet 13. The DNS server device 14 receives the host name and the IP address corresponding to the host name from the name registration server device 15, registers them, and discloses them (step S 1104). Then, the DNS server device 14 transmits an external registration response indicating that the host name and the IP address corresponding to the host name have been registered to the name resolution device 12 (step S1105).

  As described above, in the second embodiment, the host name selected from the name resolution information held by the name resolution information storage unit 125a and the IP address corresponding to the host name are connected via the network, Since the name resolution information of the communication terminal device 10 is registered in the DNS server device 14 and transmitted to the name registration server device 15 that requests to be disclosed, it can be registered in the DNS server device 14 on the Internet. Therefore, it is possible to access the communication terminal device 10 connected to the LAN from the Internet.

(Embodiment 3)
By the way, in Embodiment 1, when the name resolution device 12 receives a name resolution request from the communication terminal device 10, it generates a name resolution response including its own host name and IP address in response to the received name resolution request. The case of transmitting to the communication terminal device 10 has been described. However, the present invention is not limited to this, and when the name resolution device 12 receives a name resolution request from the communication terminal device 10 as indicated by the broken line in FIG. 1, the received name resolution request is transferred to the DNS server device 14. The host name of the DNS server apparatus 14 that manages the domain of the communication terminal apparatus 10 included in the name resolution response of the DNS server apparatus 14 in response to the transmitted name resolution request and the IP address corresponding to the host name It can be applied to the case where the IP address corresponding to the host name is changed and transmitted to the communication terminal device 10. In the third embodiment, the above case will be described. In the third embodiment, only differences from the first embodiment will be described.

  Since the configuration of the name resolution device according to the third embodiment is the same as the functional block diagram of the first embodiment shown in FIG. 3, the description thereof is omitted, and the name resolution procedure of the name resolution device according to the third embodiment is omitted. Will be described. FIG. 12 is a flowchart showing the name resolution procedure of the name resolution device according to the third embodiment. As shown in the figure, the difference from the name resolution procedure of FIG. 7 is Steps S1203 to S1205, and the others are the same, so Steps S1203 to S1205 will be described.

  That is, if the acquired name resolution request is a name resolution request for a DNS server apparatus assigned to manage a domain with a name resolution request (Yes in step S1202), the external name resolution unit 126b1 determines that the DNS server apparatus in the DNS server apparatus table 125b. A name resolution request is transmitted to 14 (step S1203). Further, the name resolution response generation unit 126b2 receives a name resolution response to the name resolution request from the DNS server device 14 relayed by the external name resolution unit 126b1 (step S1204), and receives the name resolution response of the received DNS server device 14 The DNS server device assigned to manage a domain included in the host name and the IP address corresponding to the host name are changed to the host name of the name resolution device 12 and the IP address corresponding to the host name, and the communication terminal device 10 (Step S1205).

  As described above, in the third embodiment, since the external name resolution unit 126b1 inquires the DNS server device 14 about the name resolution request, the external name resolution unit 126b1 is connected to the communication terminal device 10 or 10a, 10b. When the received name resolution request is to resolve the name of the DNS server device 14, the name resolution response is acquired from the DNS server device 14 by inquiring the name resolution request to the DNS server device 14, and the name resolution response is obtained. The generation unit 126b2 can generate a name resolution response in which the host name and IP address included in the name resolution response are replaced with the host name and IP address of the name resolution device 12. Therefore, name resolution information to be registered in the DNS server device 14 is stored, and for example, name resolution can be performed in the same manner as when it is registered in the DNS server device 14 on the Internet.

(Embodiment 4)
By the way, the name resolution apparatus and the name resolution method described in the first to third embodiments can be realized by executing a program prepared in advance on a computer system such as a personal computer or a workstation. Therefore, in the fourth embodiment, a computer system that executes a name resolution program having the same function as the name resolution apparatus described in the first to third embodiments will be described.

  FIG. 13 is a system configuration diagram showing the configuration of the computer system according to the fourth embodiment, and FIG. 14 is a block diagram showing the configuration of the main body in the computer system shown in FIG. As shown in FIG. 13, a computer system 200 according to the fourth embodiment includes a main body 201, a display 202 for displaying information such as an image on a display screen 202a according to an instruction from the main body 201, and the computer. A keyboard 203 for inputting various information to the system 200 and a mouse 204 for designating an arbitrary position on the display screen 202a of the display 202 are provided.

  Further, as shown in FIG. 14, the main body unit 201 in the computer system 200 includes a CPU 221, a RAM 222, a ROM 223, a hard disk drive (HDD) 224, a CD-ROM drive 225 that accepts a CD-ROM 209, and a flexible disk. An FD drive 226 that accepts an (FD) 208; an I / O interface 227 that connects the display 202, keyboard 203, and mouse 204; and a LAN interface 228 that connects to a local area network or wide area network (LAN / WAN) 206 Prepare.

  Further, a modem 205 for connecting to a public line 207 such as the Internet is connected to the computer system 200, and another computer system (PC) 211 and server 212 are connected via a LAN interface 228 and a LAN / WAN 206. In addition, a printer 213 and the like are connected.

  And this computer system 200 implement | achieves a name resolution apparatus by reading and executing the name resolution program recorded on the predetermined recording medium. Here, the predetermined recording medium is not limited to “portable physical medium” such as flexible disk (FD) 208, CD-ROM 209, MO disk, DVD disk, magneto-optical disk, IC card, etc. Connected to internal and external hard disk drives (HDD) 224, “fixed physical media” such as RAM 222 and ROM 223, public line 207 connected via modem 205, other computer system 211, and server 212 Any recording medium that records a name resolution program readable by the computer system 200 such as a “communication medium” that holds the program in a short period of time when the program is transmitted, such as a LAN / WAN 206 that is used.

  That is, the name resolution program is recorded on a recording medium such as the above-described “portable physical medium”, “fixed physical medium”, “communication medium”, etc. so that the computer system 200 can be read. The name resolution program and the name resolution method are realized by reading and executing the name resolution program from such a recording medium. Note that the name resolution program is not limited to being executed by the computer system 200, and when the other computer system 211 or the server 212 executes the name resolution program, the name resolution program cooperates with the name resolution program. The present invention can be similarly applied to the case where the above is executed.

  In the first and third embodiments, the host name of the communication terminal device 10 and the IP address corresponding to the host name are also updated using the same name registration procedure as that for new registration. The present invention is not limited to this, and when updating, the IP address of the internal interface of the name resolution device 12 can be stored, and the name can be directly registered in the name resolution device 12.

  In the first to fourth embodiments, the case where the name resolution device 12 has an input unit and a display unit and the user directly interfaces with the name resolution device 12 has been described. However, the present invention is not limited thereto. The present invention can be applied to a case where the name resolution device 12 does not have an input unit and a display unit, and the user interfaces with the name resolution device 12 via a Web browser mounted on the communication terminal device 10 connected via a LAN. In this case, the storage unit uses a RAM (Random Access Memory).

  In the first and third embodiments, the case where the communication device and the network are compatible with IPv6 has been described. However, the present invention is not limited to this, and the communication device and the network are compatible with IPv4. Can also be applied.

It is a figure explaining name registration using DNS UPDATE of the name resolution system concerning this Embodiment 1. FIG. It is a figure explaining the external name registration of the name resolution system which concerns on this Embodiment 1. FIG. It is a functional block diagram which shows the structure of the name resolution system which concerns on this Embodiment 1. It is a figure which shows an example of the name resolution information storage part of the name resolution apparatus shown in FIG. It is a figure which shows an example of the user interface of the name resolution information of the name resolution apparatus shown in FIG. It is a flowchart which shows the name resolution packet distribution procedure of the name resolution apparatus shown in FIG. It is a flowchart which shows the name resolution procedure of the name resolution apparatus shown in FIG. It is a flowchart which shows the name resolution / update / deletion procedure shown in FIG. It is a flowchart which shows the external registration procedure of the name resolution apparatus shown in FIG. It is a functional block diagram which shows the structure of the name resolution system which concerns on this Embodiment 2. It is a flowchart which shows the external registration procedure of the name resolution apparatus shown in FIG. It is a flowchart which shows the name resolution procedure of the name resolution apparatus which concerns on this Embodiment 3. FIG. 10 is a system configuration diagram illustrating a configuration of a computer system according to a fourth embodiment. It is a block diagram which shows the structure of the main-body part in the computer system shown in FIG.

Explanation of symbols

10, 10a, 10b Local node or communication terminal device 11, 13 Network 12 Name resolution device 14 DNS server or DNS server device 15 Name registration server device 101 Interface unit 102, 123 Input unit 103, 124 Display unit 104 Control unit 104a Name resolution Request generation unit 104b Name registration request generation unit 121 Internal interface unit 122 External interface unit 125 Storage unit 125a Name resolution information storage unit 125b DNS server device table 126 Control unit 126a Name resolution packet distribution unit 126b Name resolution unit 126b1 External name resolution unit 126b2 Name resolution response generation unit 126b3 Name resolution information search unit 126c Name registration unit 126c1 External name registration selection unit 126c2 External name registration request unit 200 Computer system 201 Body 202 Display 202a Display screen 203 Keyboard 204 Mouse 205 Modem 206 Local area network or wide area network (LAN / WAN)
207 Public line 208 Flexible disk (FD)
209 CD-ROM
211 Other computer systems (PC)
212 Server 213 Printer 221 CPU
222 RAM
223 ROM
224 hard disk drive (HDD)
225 CD-ROM drive 226 FD drive 227 I / O interface 228 LAN interface

Claims (9)

A name resolution device that mediates between a communication terminal device and a name resolution server device that performs name resolution in response to a name resolution request from the communication terminal device,
When a name resolution request of a name resolution server device that manages a certain domain is received from the communication terminal device, a name that generates a name resolution response including an identification name and address information of the name resolution device in response to the name resolution request A solution response generating means;
Name resolution response transmission means for transmitting the name resolution response generated by the name resolution response generation means to the communication terminal device;
A name registration request receiving means for receiving a name registration request for requesting the name resolution apparatus to register name resolution information including an identification name and address information of an arbitrary communication terminal apparatus;
A name resolution apparatus comprising: name resolution information storage means for storing name resolution information included in the name registration request received by the name registration request reception means. An external name resolution means for querying the name resolution server device for the name resolution request;
When the name resolution request received from the communication terminal device is to resolve the name of the name resolution server device, the external name resolution means inquires the name resolution server device for the name resolution request, Obtain a name resolution response from the name resolution server device,
2. The name resolution response generation unit generates a name resolution response by replacing the identification name and address information included in the name resolution response with the identification name and address information of the name resolution device. Name resolution device. Of the name resolution information stored by the name resolution information storage means, an external name registration selection means for selecting an arbitrary identification name and address information corresponding to the arbitrary identification name;
The external registration request means for requesting to register the identification name selected by the external name registration selection means and the address information corresponding to the identification name in the name resolution server device. 1. The name resolution device according to 1. A name resolution system comprising a communication terminal device and a name resolution device that mediates between a name resolution server device that performs name resolution in response to a name resolution request from the communication terminal device,
The communication terminal device
Name resolution request transmission means for transmitting the name resolution request of the name resolution server device managing a certain domain to the name resolution device;
As a response to the name resolution request, name resolution response receiving means for receiving a name resolution response including an identification name and address information of the name resolution device from the name resolution device;
Name registration request transmitting means for transmitting a name registration request for requesting registration of name resolution information including identification name and address information of an arbitrary communication terminal device to the name resolution device,
The name resolution device
A name resolution response generating means for generating the name resolution response to the name resolution request when the name resolution request of the name resolution server device is received from the communication terminal device;
Name resolution response transmission means for transmitting the name resolution response generated by the name resolution response generation means to the communication terminal device;
Name registration request receiving means for receiving the name registration request transmitted by the name registration request transmitting means;
Name resolution information storage means for storing the name resolution information included in the name registration request received by the name registration request reception means;
A name resolution system characterized by comprising: Further comprising name resolution information search means for searching for name resolution information stored in the name resolution information storage means based on the name resolution request;
The name resolution response generation unit generates a name resolution response including the searched name resolution information when the name resolution information is searched by the name resolution information search unit. Name resolution device.   2. The name resolution apparatus according to claim 1, wherein the name resolution information storage unit stores an identification name and address information of an arbitrary communication terminal apparatus, and detected time or physical address information. The name registration request receiving means, when the address information of the name resolution information included in the name registration request is an IPv6 address of a link local scope, an IPv6 network prefix included in a route control packet notified to the network. Use to generate global scope address information,
The name resolution apparatus according to claim 1, wherein the name resolution information storage unit stores address information generated by the name registration request reception unit. A name resolution method used in a name resolution device that mediates between a communication terminal device and a name resolution server device that performs name resolution in response to a name resolution request from the communication terminal device,
A step of generating a name resolution response including an identification name and address information of the name resolution device in response to the name resolution request when receiving a name resolution request of a name resolution server device managing a certain domain from the communication terminal device When,
Transmitting the generated name resolution response to the communication terminal device;
Receiving a name registration request for requesting the name resolution device to register name resolution information including the identification name and address information of an arbitrary communication terminal device;
Storing name resolution information included in the name registration request received by the name registration request receiving means;
Name resolution method characterized by including. A name resolution program used in a name resolution device that mediates between a communication terminal device and a name resolution server device that performs name resolution in response to a name resolution request from the communication terminal device,
When a name resolution request of a name resolution server device managing a certain domain is received from the communication terminal device, a name resolution response including an identification name and address information of the name resolution device is generated in response to the name resolution request ,
Sending the name resolution response to the communication terminal device;
The communication terminal apparatus receives a name registration request for requesting the name resolution apparatus to register name resolution information including an identification name and address information of an arbitrary communication terminal apparatus,
Storing name resolution information included in the received name registration request;
When the name resolution request is received from the communication terminal device, if the name resolution information corresponding to the name resolution request has already been stored, the stored name resolution information is responded.
If not stored, a name resolution program causing a computer to execute a procedure of responding to a result of inquiring the name resolution request to the name resolution server device.

Images