JP2002073564A - Fixing/allocating method for server-side terminal number - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that a system cannot fixedly be connected to a terminal which a server computer manages by using an IP address since the IP address changes when a client computer is the client of DHCP. SOLUTION: A peculiar ID number is given to every emulator of the client computer apart from the IP address and the ID is transmitted to a server computer-side. The ID number is used as a terminal number on the server computer-side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an emulator connection between a client computer and a server computer using a TCP / IP protocol.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS.

[0003] FIG. 3 shows a conventional client / client.
It is a block diagram of a computer and a server computer.

The client computer 1 has an IP address 1, the client computer 2 has an IP address 2, the client computer 3 has an IP address 3,
Are defined respectively, and emulators 11 to
13 is an operating environment.

The server computer 6 is a server computer to which the emulator is connected, and has a management table 61 of available terminal numbers and a table 62 defining terminal numbers corresponding to each IP address shown in FIG. I have. Each computer operates on the LAN 7 using the TCP / IP protocol. FIG. 4 shows an example of the contents of the correspondence table 62 between the IP address and the terminal number. The IP address is an address number used in the TCP / IP protocol, and the terminal number is for identifying each client emulator managed on the server side, and is assigned on the server side after connecting to the emulator. By using the terminal number to identify the emulator on the server, it is used to restrict the use of programs and the like that run on the server computer for each emulator. FIG. 5 shows a flow when the emulator 11 of the client computer 1 connects to the server computer 6 side.

Next, the operation will be described. An emulator terminal running on the client computer is connected to the server
When a fixed connection is made to a terminal number managed on the computer side, a correspondence table between the terminal number and the IP address shown in FIG. 4 is created on the server computer side, and as shown in FIG. When a connection request is received, the IP address of the client computer is obtained, and the connection is made with reference to a correspondence table between the terminal number and the IP address on the server computer side. For example, as shown in FIG. 5, an emulator 1 on a client computer 1 having an IP address 1
When a connection request comes from 1 to the server computer 6,
When the server computer receives the TCP / IP connection request, the server computer 6 recognizes the IP address 1 of the client computer 1 and uses this to correspond to the IP address 1 from the table 62 shown in FIG. Terminal number 2 to be transmitted, and a terminal number allocation completion notification is returned to the client computer 1.
Emulator operation can be started between servers.

[0007]

SUMMARY OF THE INVENTION In the conventional connection method,
Client computer is a DHCP (Dynamic Host
In the case of a client of the Configuration Protocol, since the IP address changes each time the client is started, there is a problem that the IP address cannot be fixedly connected to the terminal number managed by the server computer. The present invention has been made to solve the above problems.

[0008]

According to the present invention, a unique ID number is provided for each emulator of a client computer in addition to an IP address, and this ID is transmitted to a server computer side, and the server computer side transmits the ID. This ID number is used as a terminal number.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a configuration diagram. The client computers 1, 2, and 3 are defined as DHCP clients, respectively. The ID number 2 is defined in the emulator 11 of the computer 1, the ID number 10 is defined in the emulator 12 of the computer 2, and the emulator 13 of the computer 3 is defined. ID number 1 is defined in the table.

The server computer 4 is a DHCP server.
IP address 1, IP address 2, and IP address 3 are defined as free IP addresses that have the server 41 and can be passed to the DHCP client.

The server computer 5 is a server computer to which the emulator is connected, and has a management table 51 of available terminal numbers. Each computer is a LAN using TCP / IP protocol
7.

FIG. 2 shows a flow when the emulator 11 of the client computer 1 connects to the server computer 5.

The operation will be described with reference to FIG. For example, when connecting to the server computer 5 from the emulator 11 on the client computer 1, the client computer 1 first obtains an IP address from the server computer 4 using the DHCP protocol. The assignment of the IP address in the DHCP server 41 is appropriately assigned from a vacant IP address pool. In this example, it is assumed that the IP address 3 is assigned. Upon receiving the IP address 3, the client computer connects the emulator 11 to the server computer 5 using this IP address. When the server computer 5 receives the TCP / IP connection request, the emulator 11 of the client computer 1
Is transmitted to the server computer 5. The server computer 5 recognizes the ID number 2 of the client computer 1, and uses this number as it is as a terminal number. That is, terminal number 2 is assigned.

[0015]

According to the present invention, a unique ID number is assigned to each emulator of the client computer, this ID is transmitted to the server computer, and the server computer allocates a terminal number for each ID number. To use a DHCP client
Even if the IP address changes like a computer, it can be fixedly assigned to the terminal number managed by the server computer. In addition, in the case of this method, the server computer does not need to have a correspondence table between the IP address and the terminal number.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a server computer and a client computer according to a first embodiment of the present invention.

FIG. 2 is a flowchart when the emulator of the client computer 1 connects to the server computer 5 according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a conventional server computer and a client computer.

FIG. 4 shows an I which is held by a conventional server computer.
It is a figure showing the example of a correspondence table of a P address and a terminal number.

FIG. 5 is a flowchart when the emulator of the client computer 1 of the related art is connected to the server computer 6;

[Explanation of symbols]

1-3 client computer, 4,5 server computer, 11-13 emulator,
51 Terminal number management table.

Claims (1)

[Claims] When connecting an emulator terminal from a client computer to a server computer using a TCP / IP protocol, the server computer is fixedly managed even if the IP address changes like a DHCP client. As a method of assigning a terminal number, a unique ID number is assigned to each emulator of the client computer, and after connecting to the server computer, the unique ID number of each emulator is transmitted to the server, and this ID is used as it is by the server computer. A fixed assignment method of server-side terminal numbers, characterized in that the terminal numbers are assigned as terminal numbers managed by the server.