JP2005078193A - Protocol automatic selection device, method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To connect by automatically selecting a protocol without setting connection information by a user conscious of the kind of a protocol to be used in a network environment or for an application of a connection destination. <P>SOLUTION: A protocol automatic selection device is provided with a protocol information storage 17 which previously stores protocol information for each protocol to be used for a connection with the application; a protocol control unit 14 which, when a request for connecting to the application is received, reads out the pieces of protocol information sequentially from the protocol information storage 17, and directs a connection using the protocol information until the connection to the application of the connection destination is made successfully, or a connection by a protocol using every piece of the protocol information stored in the protocol information storage 17 results in failure; and a communication control part 18 which requests a connection with the application of the connection destination by a protocol using protocol information designated from the protocol control part 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an automatic protocol selection apparatus and method, and a program.

  In recent years, with the expansion of the Internet, various services are provided on the Internet. For example, the instant messaging service is a service that checks whether the other party that wants to communicate is online or connected to the Internet, and if it is online, can exchange messages between user terminals instantly via the Internet. is there. In this service, the instant messenger client software (hereinafter referred to as client software), which is the terminal-side instant messaging service software, is the server-side instant messaging service software, and has the function of knowing whether the other party is currently connected to the Internet. It is necessary to connect to the instant messenger server software (hereinafter referred to as server software). However, the protocol used depends on the network connection configuration between the client software and the server software, the server software, and the like. Therefore, the user of the client software (hereinafter referred to as the user) chooses which protocol to connect to according to the connection configuration with the server software to which the destination terminal's online status is inquired and the current server software. However, it is necessary to make appropriate settings on the connection setting screen for client software.

On the other hand, Patent Document 1 discloses a technology that can recognize the location of a user who uses a terminal device connected by various methods. Specifically, when a user uses a plurality of different terminal devices, information specific to the user and information specific to the terminal device used by the user are transmitted to the information management device as specific information. The information management device identifies the user who uses the terminal device by storing the specific information, and notifies each user of the information related to the identified user so that each user recognizes the terminal device to be used with each other. Can do.
JP 2000-295244 A

The conventional method described above has the following problems. First, the first problem is that it takes time to connect to the server software normally. The reason for this is that the information necessary for connection includes a lot of information that is difficult for general users, and the settings are easy to make mistakes. The second problem is that resetting is required every time the network environment used by the user changes. The reason is that when the user performs manual setting, the client can hold only one setting information, and even if a plurality of setting information can be held, one protocol is used. This is because it can only be selected.
However, with the technique of Patent Document 1, it is not possible to select an upper layer protocol corresponding to an application included in the terminal device.

  The present invention has been made in view of the above circumstances, and the user automatically selects a protocol without setting connection information in consideration of the type of protocol used in the network environment, the connection destination node or application. An object of the present invention is to provide a protocol automatic selection apparatus and method capable of establishing a connection, and a program.

  In order to solve the above-described problems, the present invention provides a protocol automatic selection device for selecting a protocol used for communication with a connection destination node or application, and for each protocol used for connection with a node or application. A protocol information storage unit for storing protocol information, which is information used for connection by the network, and a connection request to the node or application upon receipt of a connection request to the node or application, or the protocol information Until the connection by the protocol using all the protocol information stored in the storage unit fails, the protocol information is sequentially read from the protocol information storage unit, and the protocol control unit for instructing the connection using the protocol information; and Protocol control A communication control unit which requests a connection with the connection destination of the node or application by protocol using protocol information instructed from a protocol automatic selection device, characterized in that it comprises a.

  The present invention further includes a connection setting information storage unit that stores protocol information of a protocol that has been successfully connected immediately before, and the protocol control unit uses a protocol that uses the protocol information read from the connection setting information storage unit. When the connection with the node or application of the communication destination is instructed and the connection fails, the protocol information in the protocol information storage unit is read, and the node or application of the connection destination by the protocol using the protocol information is read. It is characterized by instructing the connection.

  Further, in the present invention, the protocol information storage unit stores the frequency of a protocol that has been successfully connected, and the protocol control unit reads the protocol information in order according to the frequency in the protocol information storage unit, and the protocol information Instructing the connection with the node or application of the connection destination by the protocol using, and writing the frequency of successful connection in the protocol information storage unit corresponding to the protocol.

  In order to solve the above-described problem, the present invention provides a protocol automatic selection method used in a protocol automatic selection apparatus that selects a protocol used for communication with a connection destination node or application, and is used for connection with a node or application. For each protocol used, a protocol information storage unit for storing protocol information, which is information used for connection by the protocol, is prepared, a connection request to the node or application is received, and connection to the node or application to be connected is made The protocol information is sequentially read from the protocol information storage unit until connection by the protocol using all the protocol information stored in the protocol information storage unit fails or connection using the protocol information is performed. Instruct Requesting a connection to said node of destination by the protocol using the protocol information instructed by the protocol control unit or application, a protocol automatic selection method characterized by.

  In order to solve the above-described problems, the present invention provides a protocol automatic selection program used in a protocol automatic selection device that selects a protocol used for communication with a connection destination node or application, and connects to the node or application. Successful connection to the connection destination node or application from the protocol information storage unit that stores the protocol information, which is information used for connection by the protocol, for each protocol used for connection to the node or application. Or reading the protocol information in order until the connection by the protocol using all the protocol information stored in the protocol information storage unit fails, and instructing the connection using the protocol information. Tap And requesting a connection to a connection destination of the node or application by protocol using Tokoru information, a protocol automatic selection program for causing a computer to execute the.

According to the present invention, a user can connect to a communication destination node or application from his / her terminal without being aware of a protocol implemented by the communication destination node or application or a network connected to the node.
In addition, since the connection with the communication destination node or application is first attempted using the protocol that was successfully connected last time, the processing operation and time until the connection is successful can be reduced.
In addition, by trying to connect using protocols in descending order of frequency of successful connections, it is possible to reduce processing operations and time until the connection is successful.

FIG. 1 is a block diagram showing the configuration of the embodiment of the present invention in a functional manner. Here, the main configuration of a client terminal 1 configured with, for example, a PC (personal computer) or the like, in which the protocol automatic selection device of the present invention is mounted, is shown.
In FIG. 1, a client terminal 1 is connected to servers 3a to 3n (hereinafter referred to as “server 3”) via a network 2 such as the Internet or a LAN (Local Area Network). Each of the servers 3a to 3n is an instant messenger server unit 31a to 31n (hereinafter referred to as a function for checking whether or not the client terminal 1 as a communication destination is currently connected to the network). "Instant messenger server unit 31"). Each instant messenger server unit 31 implements different protocols such as SIP (Session Initiation Protocol) and HTTP (Hypertext Transfer Protocol).

The client terminal 1 includes an input unit 11, an instant messenger client unit 12, and a browser definition information storage unit 19.
The input unit 11 controls input using a keyboard, a mouse, or the like.
The browser definition information storage unit 19 stores proxy information used by the WWW browser included in the client terminal 1. The proxy information includes, for example, information such as whether or not there is a proxy and, if there is a proxy, an IP address thereof.

The instant messenger client unit 12 is software on the client side of the instant messaging service, and includes a message control unit 13, a protocol control unit 14, a connection setting information storage unit 15, a proxy information acquisition unit 16, a protocol information storage unit 17, and a communication The control unit 18 is configured.
The protocol information storage unit 17 stores protocol information used for the protocol implemented by each instant messenger server unit 31, trial order, and connection success frequency. The protocol information includes, for example, information such as a port number used for communication with each instant messenger server unit 31, a type of protocol, a message to be transmitted according to state transition, and contents to be set in the message. Also, in the case of a configuration in which NAT (Network Address Translation) is performed with the network 2, information on a port number to be tried in order to pass through this NAT can be stored. Therefore, for example, even the servers 3 using the same SIP or HTTP have different protocol information, and are considered to be different protocols. Note that the trial order is determined in descending order of connection success frequency.
The connection setting information storage unit 15 stores connection setting information including protocol information and proxy information of a protocol that has been successfully connected to the instant messenger server unit 31 last time.

The message control unit 13 receives a message input by the user from the input unit 11 and requests the protocol control unit 14 to transmit the message to the protocol control unit 14. Further, the message received from the server 3 is displayed on a display means such as a display (not shown).
The protocol control unit 14 inquires of the connection setting information storage unit 15 about the connection setting information of the protocol that was successfully connected last time. When connection setting information of the protocol that was successfully connected last time is obtained, the communication control unit 18 is instructed to connect by the protocol using the protocol information and proxy information indicated by the connection setting information. On the other hand, if the connection setting information is not obtained, communication control is performed on the connection using the protocol information of the first protocol in the trial order read from the protocol information storage unit 17 and the proxy information obtained from the proxy information acquisition unit 16. The unit 18 is instructed. If the connection fails, the protocol information of the next protocol is read from the protocol information storage unit 17 according to the trial order, and the communication control unit 18 is instructed to connect. If the connection is successful, connection setting information including protocol information and proxy information of the protocol used at this time is written in the connection setting information storage unit 15. Further, the connection success frequency is written into the protocol information storage unit 17.
The proxy information acquisition unit 16 acquires proxy information used for the WWW browser included in the client terminal 1 from the browser definition information storage unit 19. By using a definition file for reading proxy information, a plurality of different WWW browsers can be supported.
The communication control unit 18 connects to the server 3 by a protocol using the protocol information and proxy information instructed from the protocol control unit 14, and transmits and receives messages.

FIG. 2 illustrates a connection operation when connection setting information of a protocol that has been successfully connected last time is not stored in the connection setting information storage unit 15. This can be assumed, for example, when this is the first connection to the server 3.
First, the user inputs a message using the keyboard of the client terminal 1. Thereby, the message control part 13 receives a message via the input part 11 (step S110). The message control unit 13 requests the protocol control unit 14 to send a message to the server 3 (step S120).

  The protocol control unit 14 inquires of the connection setting information storage unit 15 about the connection setting information of the protocol successfully connected last time (step S130). Since the requested information is not stored, the connection setting information storage unit 15 returns a response “no information” (step S140). In response to this, the protocol control unit 14 requests the proxy information acquisition unit 16 to acquire proxy information (step S150). The proxy information acquisition unit 16 acquires proxy information from the browser definition information storage unit 19. Here, one proxy information is acquired, but when there are a plurality of WWW browsers, the proxy information is acquired. The proxy information acquisition unit 16 returns the acquired proxy information to the protocol control unit 14 (step S160). The protocol control unit 14 stores the acquired proxy information in the connection setting information storage unit 15 (step S170).

Subsequently, the protocol control unit 14 reads the protocol information in order from the protocol information storage unit 17 according to the protocol trial order until the communication control unit 18 succeeds in communication with the server 3 or there is no protocol to be supported. The proxy information acquired from the information acquisition unit 16 is notified to the communication control unit 18 to request connection.
Specifically, it operates as follows.
The protocol control unit 14 establishes a connection using the protocol 1 using the protocol information of the first protocol in the trial order read from the protocol information storage unit 17 and the proxy information read from the proxy information acquisition unit 16 to the communication control unit 18. A request is made (step S180). The communication control unit 18 tries to connect to the server 3 by the protocol 1 using the instructed protocol information and proxy information (step S190). If the protocol 1 is not the protocol used for connection with the server 3, a notification of connection failure is returned from the router or the connection server constituting the network 2 (step S200). The communication control unit 18 notifies the protocol control unit 14 that the connection has failed (step S210).

  When the protocol control unit 14 receives a notification that the connection has failed, the protocol control unit 14 controls communication by using the protocol No. 2 using the protocol information of the second protocol in the trial order and the proxy information read from the proxy information acquisition unit 16. Request to the unit 18 (step S220). The communication control unit 18 tries to connect to the server 3 by the protocol 2 using the instructed protocol information and proxy information (step S230). Similar to protocol 1, if protocol 2 is not a protocol used for connection with server 3, communication control unit 18 receives a notification of connection failure from network 2 (step S 240). This is notified to the protocol control unit 14 (step S250).

It is assumed that the connection up to protocol N-1 fails in the procedure described above, and then connection is made with protocol N.
The protocol control unit 14 uses the protocol information of the Nth protocol in the trial order read from the protocol information storage unit 17 and the proxy information read from the proxy information acquisition unit 16 to connect to the communication control unit 18 using the protocol N. A request is made (step S300). The communication control unit 18 tries to connect to the server 3 by the protocol N using the instructed protocol information and proxy information (step S310). If the protocol N is a protocol used for connection with the server 3, a connection request is notified to the server 3 via the network 2 (step S320). Then, when a connection success response is received from the server 3, the connection success is returned to the communication control unit 18 via the network 2 (steps S330 and S340). The communication control unit 18 notifies the protocol control unit 14 that the connection has been successful (step S350).

  When the protocol control unit 14 receives a notification of the successful connection from the communication control unit 18, the protocol control unit 14 notifies the message control unit 13 that the connection has been successful (step S360). Further, the protocol control unit 14 stores the protocol information of the protocol that has been successfully connected to the connection setting information storage unit 15 (step S370). Further, the protocol control unit 14 writes the number of successful connections in association with the protocol information used for the protocol N. Thereby, the trial order of the protocol information is determined in descending order of the number of successful connections.

If there are a plurality of pieces of proxy information read by the proxy information acquisition unit 16, for example, the protocol can be tried in the following order. That is, the protocol control unit 14 first requests the communication control unit 18 to connect the protocol information of the first protocol in the trial order and the proxy information read from the proxy information acquisition unit 16. Subsequently, the communication control unit 18 is requested to connect the protocol information of the second protocol in the trial order and the proxy information read from the proxy information acquisition unit 16. In this way, connection is attempted using a protocol combined with each proxy information for all the protocol information in the connection setting information storage unit 15 according to the trial order.
In the above description, the proxy information is acquired from the browser definition information storage unit 19, but may be input by the user.

FIG. 3 illustrates the connection operation when the connection setting information of the protocol that was successfully connected last time is stored in the connection setting information storage unit 15 and the connection is successful using this protocol.
The operation of steps S410 to S430 in which the user inputs a message and the protocol control unit 14 inquires of the connection setting information storage unit 15 about the connection setting information of the protocol that was successfully connected to the connection setting information storage unit 15 in FIG. The operation is the same as that in steps S110 to S130.
The connection setting information storage unit 15 returns the connection setting information of the protocol N that has been successfully connected to the previous connection stored therein to the protocol control unit 14 (step S440). The protocol control unit 14 requests the communication control unit 18 to connect to the server 3 using the protocol N using the protocol information and proxy information in the acquired connection setting information (step S450).

  The communication control unit 18 tries to connect to the server 3 by the protocol N using the protocol information and proxy information instructed from the protocol control unit 14 (step S460). When the protocol N matches the protocol used for connection with the server 3, a connection request is notified to the server 3 via the network 2 (step S470). Then, when a connection success response is received from the server 3, the connection success is returned to the communication control unit 18 via the network 2 (steps S480 and S490). The communication control unit 18 notifies the protocol control unit 14 that the connection has been successful (step S500).

  The protocol control unit 14 notifies the message control unit 13 that the connection is successful, and the message control unit 13 stores the connection setting information including the protocol information and proxy information used for the protocol N that has been successfully connected. The steps S510 to S520 are stored in the unit 15 and the number of successful connections is written in correspondence with the protocol information used for the protocol N. The procedures in steps S360 to S370 in FIG. is there.

FIG. 4 illustrates the connection operation when the connection setting information of the protocol that was successfully connected last time is stored in the connection setting information storage unit 15 and the connection using this protocol fails.
A user inputs a message, receives an instruction from the protocol control unit 14, and the communication control unit 18 transmits to the server 3 by the protocol N using the connection setting information that was read from the connection setting information storage unit 15 and succeeded in the previous connection. The operation from step S610 to step S660 in which the connection is attempted is the same as the operation from step S410 to step S460 in FIG.
If the protocol N is not a protocol used for connection with the server 3, a notification of connection failure is returned from the router or the connection server constituting the network 2 (step S670). The communication control unit 18 notifies the protocol control unit 14 that the connection has failed (step S680).

  Upon receiving notification that the connection has failed, the protocol control unit 14 requests proxy information acquisition via the proxy information acquisition unit 16, and the communication control unit 18 succeeds in communication with the server 3, or Until the protocol to be supported disappears, the protocol information is sequentially read from the protocol information storage unit 17 according to the trial order, and the operation after step S690 that requests connection to the communication control unit 18 is performed after step S150 in FIG. The operation is the same. However, FIG. 4 shows an example in which the connection is successful by the protocol J. Accordingly, in step S870, the protocol control unit 14 stores the protocol information used for the protocol J in the connection setting information storage unit 15. Further, the protocol control unit 14 writes the number of successful connections in correspondence with the protocol information used for this protocol J. Then, the trial order of the protocol information is determined in descending order of the number of successful connections.

FIG. 5 shows another embodiment of the present invention. In the figure, the same parts as those in the embodiment shown in FIG.
A router 5 is installed between the client terminal 4 and the network 2. The client terminal 4 is connected to the server 3 via the router 5 and the network 2.
The router 5 is, for example, a broadband router owned by the user. The router 5 passes only a specific port and protocol.

The client terminal 4 includes an input unit 41, an instant messenger client unit 42, and a router definition information storage unit 49.
The input unit 41 has the same function as the input unit 11.
The router definition information storage unit 49 stores, for example, router definition information indicating a communication protocol, a command, and the like used for reading the IP address of the router 5 and router information.

The instant messenger client unit 42 is software on the client side of the instant messaging service, and includes a message control unit 43, a protocol control unit 44, a connection setting information storage unit 45, a router information acquisition unit 46, a protocol information storage unit 47, and a communication The controller 48 is configured.
The connection setting information storage unit 45 stores protocol information of a protocol that has been successfully connected to the instant messenger server unit 31 last time.
Similar to the protocol information storage unit 17, the protocol information storage unit 47 stores protocol information used in the protocol implemented by each instant messenger server unit 31, trial order, and connection success frequency.

The message control unit 43 has the same function as the message control unit 13.
The router information acquisition unit 46 accesses the router 5 using the router definition information read from the router definition information storage unit 49, and acquires router information. The router information indicates, for example, the protocol type and port number that the router 5 permits to pass.
The protocol control unit 44 inquires of the connection setting information storage unit 45 about the protocol information of the protocol successfully connected last time. When the protocol information of the protocol that has been successfully connected last time is obtained, the connection instruction by the protocol using this protocol information is given. On the other hand, when the protocol information is not obtained, the protocol information of the protocol with the youngest trial order that the router 5 permits to pass, indicated by the router information read by the router information acquisition unit 46, is stored in the protocol information storage unit 47. The communication control unit 48 is instructed to connect by the protocol using the protocol information. When the connection fails, the protocol information storage unit 47 reads out the next protocol information from the protocols that the router 5 allows to pass according to the trial order, and instructs the communication control unit 48 to connect. If the connection is successful, the protocol information of the protocol used at this time is written in the connection setting information storage unit 45. At this time, part or all of the router information may be stored. Further, the connection success frequency is written into the protocol information storage unit 47.
The communication control unit 48 has the same function as the communication control unit 18.

With the above configuration, the protocol control unit 44 of the client terminal 4 performs the following operation instead of obtaining proxy information from the proxy information acquisition unit 16 in steps S150 to S170 in FIG. 2 and steps S690 to S710 in FIG. I do. That is, the protocol control unit 44 inquires the router information acquisition unit 46 about router definition information. The router information acquisition unit 46 reads the router definition information from the router definition information storage unit 49 and inquires the router 5 about the router information according to the router definition information. When the router information acquisition unit 46 receives the router information from the router 5, it passes it to the protocol control unit 44.
Then, in steps S180 to S300 in FIG. 2 and steps S720 to S800 in FIG. 4, the protocol control unit 44 passes through the router 5 indicated by the router information in ascending order of trial order from the protocol information storage unit 47. Read the protocol information of the protocol that permits. Then, using the read protocol information, the communication control unit 48 is instructed to request a connection with the instant messenger server unit 31 of the server 3 using the port that the router 5 allows to pass.
As described above, the protocol control unit 44 of the client terminal 4 uses the router information obtained from the router 5 when selecting which protocol to use. As a result, an appropriate protocol can be selected earlier. Also, by preparing router definition information, it is possible to deal with routers 5 of each company.

  In the above-described example, a protocol used between applications in different nodes connected via a network is selected. However, it may be applied to a protocol used between different applications in the same apparatus. In the example described above, the upper layer protocol is selected, but may be applied to lower layer protocol selection.

As described above, according to the present embodiment, the user terminal internally includes protocol information of the protocol supported by the communication destination node (application), and tries the protocol using this protocol information in order. Go. Therefore, the user can connect to the communication destination node from his / her terminal without being aware of the protocol implemented by the communication destination node and the network configuration with the node. Thereby, the user can connect to a server that provides an application such as an instant messenger service and enjoy the application without setting connection to the client terminal of the user.
Also, proxy information used by other applications in the user's terminal can be read and used for connection with the communication destination node. This eliminates the need for the user to input complicated connection setting information.
In addition, connection with the communication destination node is attempted by the protocol that has been successfully connected last time. In addition, connection with the communication destination node is attempted by a protocol in order of frequency of successful connection. As a result, it is possible to reduce the processing operation and time until the connection is successful.

  It should be noted that the procedures executed by each unit in the instant messenger client unit 12 of the client terminal 1 and each unit in the instant messenger client unit 42 of the client terminal 4, the server 3 and the router 5 shown in FIG. It is assumed that the network switching device of the present invention is realized by recording on a recording medium, causing the computer system to read and execute the program recorded on the recording medium. The computer system here includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” refers to a volatile memory (RAM) inside a computer system that becomes a client or a system when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design and the like within the scope not departing from the gist of the present invention.

  In an apparatus connected to a plurality of nodes, a connection protocol used for communication with a connection destination node can be automatically selected and used for connection. It is also applicable to automatically selecting a protocol used between applications.

It is the block diagram which expanded and showed the structure of the structure of this invention embodiment. It is a figure which shows the operation | movement sequence of this invention embodiment. It is a figure which shows the operation | movement sequence of this invention embodiment. It is a figure which shows the operation | movement sequence of this invention embodiment. It is the block diagram which expanded and showed the structure of the structure of this invention embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Client terminal 11, 41 ... Input part 12, 42 ... Instant messenger client part 13, 43 ... Message control part 14, 44 ... Protocol control part 15, 45 ... Connection setting information storage part 16 ... Proxy information acquisition part 17, 47 ... protocol information storage unit 18, 48 ... communication control unit 19 ... browser definition information storage unit 2 ... network 3, 3a, 3b, 3n ... server 31a, 31b, 31n ... instant messenger server unit 46 ... router information acquisition unit 47 ... router Definition information storage 49: Router definition information 5: Router

Claims (5)

A protocol automatic selection device for selecting a protocol used for communication with a connection destination node or application,
For each protocol used for connection with a node or application, a protocol information storage unit that stores protocol information that is information used for connection by the protocol;
Upon receiving a connection request to the node or application, connection with the connection destination node or application succeeds, or connection using a protocol using all protocol information stored in the protocol information storage unit fails. Until the protocol information storage unit reads out the protocol information in order, a protocol control unit for instructing a connection using the protocol information,
A communication control unit that requests connection with the node or application of the connection destination by a protocol using protocol information instructed by the protocol control unit;
A protocol automatic selection device comprising: It further includes a connection setting information storage unit that stores protocol information of a protocol that has been successfully connected immediately before,
The protocol control unit instructs connection with the node or application of a communication destination by a protocol using the protocol information read from the connection setting information storage unit, and when this connection fails, the protocol control unit Reading protocol information and instructing connection to the node or application of the connection destination by the protocol using the protocol information.
The protocol automatic selection apparatus according to claim 1, wherein: The protocol information storage unit stores the frequency of the protocol that has been successfully connected,
The protocol control unit reads the protocol information in order according to the frequency in the protocol information storage unit, instructs the connection with the node or application of the connection destination by the protocol using the protocol information, and the connection is successful. Write the frequency in the protocol information storage unit corresponding to the protocol,
3. The automatic protocol selection device according to claim 1, wherein the protocol automatic selection device is provided. A protocol automatic selection method used in a protocol automatic selection device for selecting a protocol used for communication with a connection destination node or application,
For each protocol used for connection with a node or application, a protocol information storage unit for storing protocol information that is information used for connection by the protocol is prepared.
Upon receiving a connection request to the node or application, connection with the connection destination node or application succeeds, or connection using a protocol using all protocol information stored in the protocol information storage unit fails. Until the protocol information is read in order from the protocol information storage unit, the connection using the protocol information is instructed,
Requesting connection with the node or application of the connection destination by a protocol using protocol information instructed by the protocol control unit;
Protocol automatic selection method characterized by the above. A protocol automatic selection program used in a protocol automatic selection device for selecting a protocol used for communication with a connection destination node or application,
A connection request to the node or application is received from a protocol information storage unit that stores protocol information that is information used for connection by the protocol for each protocol used for connection to the node or application. Alternatively, until the connection with the application succeeds, or until the connection with the protocol using all the protocol information stored in the protocol information storage unit fails, the protocol information is read in order, and the connection using the protocol information is performed. Instructing steps;
Requesting connection with the node or application of the connection destination by a protocol using the instructed protocol information;
Automatic protocol selection program that causes a computer to execute

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