JPH06324978A - Allocating system for port number of server program - Google Patents

Abstract

PURPOSE:To prevent the allocation of a service port number from overlapping by allocating by automatically selecting an unused port number without allocating a port number to a server program typically. CONSTITUTION:Targeted service can be received by acquiring the service port number unused by an operating system by an unuse port number acquiring means 2 by referring to information registered on a server program data base 5, allocating by conforming it to each of server programs A81, B82, and C83 to which no service port numbers are allocated by a server program = servive port number corresponding means 3, inquiring the service port number of a targeted server program to a server program managing program 1 by a service port number inquiring means 7 by a client program 6, and designating the service port number according to the information transmitted from a service port number transmission means 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assigning a service port number of a server program in a client / server system program, and more particularly to a method for automatically assigning a service port number of a server program by searching for an unused port number. .

[0002]

2. Description of the Related Art In a client-server system program, when a service is requested from the client program to the server program, the service is provided to the server program by connecting the port of the client program itself and the service port of the server program. Request. The port connected at this time is specified by a port number. There are a range of port numbers assigned by the operating system and a range of port numbers assigned by the application developer. Here, the former is a system-assigned port number range and the latter is a developer-assigned port number range.

Conventionally, the service port number of the server program is generally fixed for each service. For example, the service port number of the standard server program of the Internet network is fixed to TPC protocol No. 21 for FTP service and No. 23 for TELNET service. For this reason, from the perspective of the client program, designating the port number also meant designating the service.

When creating a new server program, the developer of the server program selects a port number which is considered not to be used by other programs from the range of port numbers assigned by the developer, and The port number was fixedly assigned as the service port number of the newly created server program.

[0005]

The conventional service port number allocation method as described above has the following problems. First, when a server program is newly developed, when selecting the service port number of the server program, there is no guarantee that the service port number does not overlap with the service port number of another program assigned by another developer. Also, as the number of types of server programs increases, so does the number of ports used, so the same port number may be assigned to different server programs by different developers, and one port may have multiple different ports. There is an increased risk that the server program that provides the service may be used as a service port in duplicate.

The present invention has been made in view of the above circumstances, and does not fixedly assign a port number to a server program, but automatically selects and assigns an unused port number. It is an object of the present invention to provide a port number allocation method for a server program that can avoid duplication of allocation of service port numbers.

[0007]

According to a first aspect of the present invention, by assigning a service port number to each server program of a server program group, the port number of the server program which allows the client program to receive the service of each server program is set. It is an allocation method and is allocated by the operating system and a database in which information about whether or not a service port number is allocated to each server program of the server program group and, if allocated, information regarding the port number is registered. The unused port number acquisition means that acquires an unused port number from the range of system-assigned port numbers that can be allocated from the operating system, and the port number acquired by this unused port number acquisition means are registered in the database. Is the server associates a service port number to the server program service port number by referring to the information which is not assigned program =
A server having service port number associating means and service port number transmitting means for transmitting to the client program information indicating the relationship between the service port number associated with this server program = service port number associating means and the server program. The program management program is provided, and the client program has a service port number inquiry means for inquiring the service port number of the target server program to the server program management program, and the service port number as a result of the inquiry by this service port number inquiry means. The service port number transmitted from the transmission means is designated to receive the service of the target server program.

A second aspect of the present invention is a method of assigning a port number of a server program that allows a client program to receive services of each server program by assigning a service port number to each server program of a server program group. , For each server program of the server program group, a database in which information on whether or not a service port number is assigned and, if assigned, information on the port number is registered, and this unused port number obtaining means is acquired. The server program = service port number associating means for associating the created port number as a service port number with a server program to which a service port number is not assigned by referring to the information registered in the database, and this server program. = A server program management program having a service port number transmitting means for transmitting information indicating the relationship between the service port number associated with the service port number associating means and the server program to the client program, and each server program , Has an unused port number acquisition means for acquiring an unused port number in the system-assigned port number range that can be assigned by the operating system from the operating system as its own service port number and registering it in the database, The client program has a service port number inquiry means for inquiring the server program management program about the service port number of the target server program. Together specify a service port number, which is transmitted from the query results service port number transmission means by means are no to receive the service object server program.

[0009]

In the port number assigning method of the server program according to the present invention, the unused port number obtaining means obtains the service port number which is not used by the operating system by referring to the information registered in the database. The server program = service port number associating unit associates and allocates each server program to which a port number is not allocated, and the client program assigns the service port number of the target server program to the server program managing program by the service port number inquiring unit. By inquiring, the intended service can be received by designating the service port number according to the information transmitted from the service port number transmitting means.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments thereof. FIG. 1 is a block diagram showing the overall configuration of an embodiment of the first invention of the port number assigning method of the server program according to the present invention.

The port number assigning method of the server program of the present invention is a system for providing a service to the client program 6 by a plurality of server program groups 8. Each server program of the server program group 8 is a server program A81, B82, It comprises a server program database 5 in which information about C83 ... Is registered in advance, and a server program management program 1 for managing the whole. The server program group 8 includes various server programs in addition to the server programs A81, B82, and C83 shown in FIG. 1, and the server programs A81, B82, and C83 among them are not yet included. It is assumed that the service port number is not assigned.

The server program management program 1 comprises an unused port number acquisition means 2, a server program = service port number association means 3, a service port number transmission means 4 and the like. Unused port number acquisition means 2
Is a means for searching for and obtaining an unused port number from a system-assigned port number range that can be assigned by the operating system. The port number acquired by this unused port number acquisition means 2 is
It may be put into use.

The server program = service port number associating means 3 is means for associating the port numbers acquired by the unused port number acquiring means 2 with the server programs A81, B82 and C83 to which the service port numbers have not yet been allocated. The service port number transmission means 4 is means for transmitting the correspondence between the service port number associated by the server program = service port number association means 3 and the server program to the client program 6 in response to an inquiry from the client program 6. Is.

In the server program database 5, information regarding each server program A81, B82, C83 ... Is registered, in particular, whether or not a service port number is allocated to each, and if so, that number. The server program database 5 may be a file, a database management system, or a result obtained by executing the program.

The client program 6 includes a service port number inquiry means 7 for inquiring the server program management program 1 about the port number of the server program.

The operation of the port number assigning method of the server program according to the present invention is as follows. As described above, it is assumed that none of the server programs A81, B82, C83 in the server program group 8 has a service port number assigned yet. Therefore, each server program A81, B8 is stored in the server program database 5.
2. As the information on C83, information indicating that a service port number is not assigned is registered.

The server program management program 1 accesses the server program database 5 to obtain information as to whether or not there is a server program to which a service port number is not assigned. Then, the server program management program 1 obtains information on the number of required ports based on the information, and uses the unused port number acquisition means 2 to obtain the required number of unused port numbers within the system-assigned port number range. To get from. At this time, if necessary, the port of the acquired port number is put into use.

Further, the server program management program 1
Shows the number of the unused port that was acquired by the server program =
The service port number associating means 3 is used to associate with a server program to which a service port number is not assigned. The client program 6 that requests a service from the server program first uses the service port number inquiry means 7 to ask the service port number transmission means 4 of the server program management program 1 for information regarding the service port number of the target server program. Get by combining. Client program 6
By specifying the port number obtained in this way, it becomes possible to connect to the target server program and receive the service.

The server programs A81, B82, C83 ...
It may be activated before the client program 6 makes a request, or the client program 6
The server program management program 1 may activate the server program after the request from the server. In the latter case, the server program management program 1 opens a service port and waits for a request, and when there is a request, starts the corresponding server program and takes over the port to the server program.

By the way, as a second invention, the server program management program 1 uses the unused port number acquisition means 2
Rather than having each server program A81, B
It is also conceivable that each of 82, C83 ... Has an unused port number acquisition means 2.

FIG. 2 is a block diagram showing a configuration example of an embodiment of the second invention of the port number assigning method of the server program of the present invention. In FIG. 2, the server program management program 1 is provided only with a server program = service port number associating means 3 and a service port number transmitting means 4, and each server program A81, B82, C83 ... Number acquisition means 810, 820, 830 ... Are provided.

In the second embodiment of the present invention, the server program management program 1 includes the server programs A81 and B.
82, C83 ... Is started before, or each server program A81, B82, C83 ... Waits for the server program management program 1 to be started, and each obtains an unused port number provided for itself. Means 810, 82
The service port number acquired by 0, 830 ... Is registered in the server program database 5.

The subsequent processing flow until the client program 6 receives a service is the same as that of the above-described first embodiment of the invention.

[0024]

As described above in detail, according to the present invention, the service port number is not fixedly assigned to the server program, but the unused port number at each time is dynamically assigned. Therefore, it is guaranteed that the service ports of the server programs are assigned so as not to overlap each other.

Further, in the conventional method, the server program is fixedly assigned to a port considered to be unused from the range of port numbers assigned by the developer, whereas in the present invention, it is assigned. Since the service port number is assigned to an unused port within the system-assigned port number range, even if the conventional method and the method of the present invention are mixed, there is no possibility that the service port number will be duplicated.

Therefore, when developing a new server program, it is necessary to investigate the service port numbers used by other server programs in order to search for unused port numbers and adjust their allocation. Absent. Further, in the conventional method, it becomes gradually difficult to assign the service port number as the number of server programs increases, but according to the present invention, such a fear does not occur even if the number of server programs increases. .

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of a first invention of a port number assigning method of a server program according to the present invention.

FIG. 2 is a block diagram showing the overall configuration of an embodiment of the second invention of the port number allocation system of the server program according to the present invention.

[Explanation of symbols]

1 server program management program 2 unused port number acquisition means 3 server program = service port number associating means 4 service port number transmitting means 5 server program database 6 client program 7 service port number inquiry means 8 server program group 81, 82, 83 Server program 810, 820, 830 Unused port number acquisition method

Claims (2)

[Claims] 1. A server program port number allocation method for allowing a client program to receive services of each server program by allocating a service port number to each server program of the server program group. Information on whether or not a service port number is assigned and, if assigned, information on that port number, and a system-assigned port number range that can be assigned by the operating system. An unused port number acquisition means for acquiring a used port number from the operating system, and a port number acquired by the unused port number acquisition means,
A server program = service port number associating means for associating a server program not assigned a service port number as a service port number with reference to the information registered in the database; and the server program = service port number associating means. And a server program management program having a service port number transmitting means for transmitting information indicating the relationship between the associated service port number and the server program to the client program, wherein the client program is the service port of the target server program. A service port number inquiring means for inquiring a number to the server program management program, and the service port number inquiring means as a result of the inquiry by the service port number inquiring means. Allocation scheme port number of the server program, characterized in that by specifying the service port number transmitted from the number transmission means are no to receive the service object server program. 2. A server program port number allocation method for allowing a client program to receive services of each server program by allocating a service port number to each server program of the server program group. With respect to, a database in which information on whether or not a service port number is assigned and, if assigned, information on the port number is registered, and a port number obtained by the unused port number obtaining means,
A server program = service port number associating means for associating a server program not assigned a service port number as a service port number with reference to the information registered in the database; and the server program = service port number associating means. A server program management program having a service port number transmitting means for transmitting information indicating the relationship between the associated service port number and the server program to the client program, and each server program can be assigned by an operating system. An unused port number within the range of possible system-assigned port numbers is acquired from the operating system as an own service port number and registered in the database. The client program has a service port number inquiring means for inquiring the server program management program about the service port number of the target server program. As a result, the service port number transmitted from the service port number transmission means is designated to receive the service of the target server program, and the server program port number allocation system is characterized.