JPH10262083A - Communication network system, conversion method for protocol in the system and recording medium recorded with and programmed with the same program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize use as a host terminal by utilizing a talent protocol by the PC of respective venders installed on a LAN line, connected to a distributed processing computer similar to the terminal of the distributed processing computer used as the host terminal on the distributed processing computer connected to a host computer by a communication channel. SOLUTION: A distributed processing computer 3 receives a data exchange request organized from a multi-vender PC 13 by built-in server 6, allocates a gateway 7 for the respective requests, prepares an information exchange area (mail box 8) on a memory, establishes a connection sequence, corresponding to the protocols of respective lines based on information written in the information exchange area by the built-in gateway 8 and transmits the data to the host computer or the multi-vender PC, while converting received data to formats corresponding to the respective protocols.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication network system, a protocol conversion method in the communication network system, and a recording medium characterized in that the method is programmed and recorded.

[0002]

2. Description of the Related Art Generally, in a distributed processing system,
Each node is connected to a host computer by a predetermined line for the purpose of totalizing data processing results and the like obtained at each node (data processing device) constituting the system.

With the recent spread of personal computers (hereinafter abbreviated as PCs), PCs of each vendor and terminal emulators of each vendor are incorporated into the system as nodes, and LA
TCP / IP (Transmission Control P
A configuration constructed by a rotocol / Internet Protocol (hereinafter referred to as a telnet protocol) is becoming mainstream. In this case, since the communication protocol between each node and the communication protocol of the host computer used conventionally are different, a TCP / IP conversion device which is special hardware is conventionally installed on the host computer side,
This has been realized by adding / changing a hardware environment such as securing a host computer channel and reviewing a large-scale software environment.

In addition, when examining a communication sequence of a LAN line or investigating a history of user data communication with a host computer, it is necessary to install a line analyzer, which is another hardware, to collect data.

[0005]

Conventionally, each vendor's P
C. When the terminal emulator of each vendor is incorporated in the system as a node, the communication protocol between each node and the communication protocol of the host computer are different. Conventionally, in order to normally execute data transfer between each node and the host computer, A TCP / IP environment, which is a communication protocol when a PC is used as a node on a host computer, must be newly constructed. In order to construct the environment, a TCP / IP converter, which is expensive hardware, is required, and a new channel must be added to the host computer. In addition, there has been a problem that the system design on the host computer side needs to be greatly reconsidered, which has a large impact on the environment setting.

In addition, there is another problem that the LAN line must be installed with a separate line analyzer to collect data when investigating a communication sequence and collecting communication history with the host computer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has the same advantages as those of a distributed processing computer used as a host terminal on a distributed processing computer connected to a host computer through a communication line. A communication network system that realizes that each vendor's PC installed on a LAN line connected to a processing computer uses a telnet protocol as a host terminal, and a protocol conversion method in the system and the same method It is an object to provide a memory medium which is programmed and recorded.

[0008]

A communication network system according to the present invention comprises: (1) a host computer, a distributed processing computer connected to the host computer via a WAN line, and exchanging data according to a first protocol; The processing computer is connected via a LAN line and comprises at least one multi-vendor PC for exchanging data according to a second protocol, wherein the distributed processing computer exchanges data according to first and second protocols supported by the respective computers. (2) The host computer and the host computer are connected via a WAN line to exchange data according to the first protocol by performing bidirectional protocol conversion on the host computer and the multi-vendor PC. A distributed processing computer, The distributed processing computer is connected to the distributed processing computer via a LAN line and comprises at least one multi-vendor PC for exchanging data according to a second protocol. The distributed processing computer exchanges data according to the first and second protocols supported by each of the distributed processing computers. Protocol conversion means for performing data exchange between the host computer and the multi-vendor PC by performing bidirectional protocol conversion on data, connection processing according to the first and second protocols, and communication of received data after arrival of received data Trace means for collecting a history and recording the history in a nonvolatile memory.

The protocol conversion method in the communication network system according to the present invention includes: (1) a host computer, a distributed processing computer connected to the host computer via a WAN line, and exchanging data according to a first protocol; In a communication network system connected to a processing computer via a LAN line and configured to exchange data according to a second protocol and comprising at least one multi-vendor PC, the distributed processing computer is connected to a multi-vendor P by an internal server.
A data exchange request issued from C is received, a gateway is allocated for each request, an information exchange area is created in a memory, and connection according to a protocol of each line is performed based on information written in the information exchange area by the built-in gateway. Establishing a sequence and transmitting data to a host computer or a multi-vendor PC while converting received data into a data format conforming to the respective protocol; (2) the host computer and the host computer are connected via a WAN line; A distributed processing computer for exchanging data according to the first protocol and a distributed processing computer are connected via a LAN line to a communication network system including at least one multi-vendor PC for exchanging data according to the second protocol. The distributed processing computer receives a data exchange request issued from a multi-vendor PC by a built-in server, allocates a gateway for each request, creates an information exchange area on a memory, and uses the built-in gateway to execute an information exchange area. Attempts connection processing according to the first and second protocols on the basis of the information written in the, collects the history of the connection sequence according to the second protocol, waits for the arrival of received data, and transmits it from the multi-vendor PC to the host computer The communication history of the data to be collected is collected.

Further, the recording medium of the present invention comprises: (1) a host computer, a distributed processing computer connected to the host computer via a WAN line and exchanging data according to a first protocol, and a distributed processing computer connected to a LAN. A protocol conversion method in a communication network system including at least one multi-vendor PC connected via a line and exchanging data according to a second protocol, wherein the server converts the multi-vendor PC
Accepts data exchange requests issued from the Internet, allocates a gateway for each request, creates an information exchange area in memory, and establishes a connection sequence according to the protocol of each line based on the information written in the information exchange area by the gateway. The data is programmed and recorded so as to transmit the data to a host computer or a multi-vendor PC while converting the received data into a data format conforming to the respective protocol. (2) The host computer and the host computer are connected via a WAN line. A distributed processing computer connected to perform data exchange according to a first protocol;
A protocol conversion method in a communication network system comprising at least one multi-vendor PC connected via an N line and exchanging data according to a second protocol, wherein the multi-vendor PC is provided by a server built in a distributed processing computer. , A gateway is allocated for each request, an information exchange area is created in a memory, and first and second data are written based on the information written in the information exchange area by the built-in gateway. And records the communication history of the data transmitted from the multi-vendor PC to the host computer after waiting for the arrival of the received data, while collecting the connection sequence history according to the second protocol. It is characterized by doing.

[0011] This eliminates the need for expensive TCP / IP conversion hardware, which has conventionally been required when a multi-vendor PC is used as a host terminal using the telnet protocol, and allows existing channels to be used as they are. is there. The host computer is TCP / IP
Since there is no need to be aware of the above and the connection environment with the existing distributed processing computer is used as it is, there is an effect that there is no change in any other hardware environment and software environment. Since the PC serving as the host terminal is connected by the telnet protocol, the PC of each vendor and the terminal emulator of each vendor can be used as they are. Furthermore, since the investigation of the communication sequence of the LAN line and the history of communication with the host computer are also written on the disk of the distributed processing computer, the effect of facilitating data investigation can be obtained.

[0012]

FIG. 1 is a block diagram showing an embodiment of the present invention.

In the figure, 1 is a host computer, 3
Is a distributed processing computer, and 13 is a multi-vendor PC. In the embodiment of the present invention, the host computer 1,
Online processing is executed between the PCs 13, and a distributed processing computer 3 that converts a communication protocol is interposed between the host computer 1 and the multi-vendor PC 13. The host computer 1 and the distributed processing computer 3 are connected by a WAN (Wide Area Network) line, and the communication protocol is HDLC (High).
vel Data Link Control) and D
Follow DX. Distributed processing computer 3 and multi-vendor P
Between Ethernet C13 and Ethernet LAN (Local A
(rear Network), and the communication protocol conforms to telnet. The conversion of the communication protocol resides in the main memory of the
The server unit 6 receives a connection request from the PC 13, and comprises a gateway unit 7 (71-71 n) which is dynamically activated by the server 6 for each connection request and corresponds to the PC 13 on a one-to-one basis.

The server unit 6 of the distributed processing computer 3 has t
It waits for a connection request from the line with the port number of the elnet protocol, and accepts the request when a connection request specifying the port number from the PC 13 is issued on the line. Upon receiving the request, the server unit 6 creates an information exchange area (mailbox) 8 between the server unit and the gateway unit on the main memory, and activates the gateway unit 7 on the main memory. All control after the activation of the gateway unit 7 is left to the gateway unit 7.

When a plurality of PCs 13 issue connection requests with the same port number, the gateway units 7 are activated by the number of connection requests. A logical address corresponding to the host computer 1 is stored in the data format of the connection request, and the logical address is associated with the host computer 1 using the logical address as a key. Host computer 1,
When the session between the PCs 13 is disconnected, the gateway unit 7 is deleted from the memory. Further, the gateway unit 7 is a Teln between the distributed processing computer 3 and the PC 13.
The communication history of the et protocol is sequentially written to an external storage such as a disk of the distributed processing computer 3. As a result, it is possible to investigate a check for illegal data and a detection of a line failure without using dedicated hardware.

FIGS. 2 to 4 are flowcharts cited for describing the operation of the embodiment of the present invention shown in FIG. 2 shows the operation of the server unit 6, and FIGS. 3 and 4 show the operation of the gateway unit 7.

The operation of FIG. 1 will be described with reference to FIG. After starting the program, the server unit 6 reads environment definition parameters in which a communication environment is set in advance by a user, and expands a physical line and a logical unit group to be used on a main memory. When a connection request according to the telnet protocol from the PC 13 is received, it is checked whether the connection request conforms to the environment definition developed on the main memory. If the connection request conforms, the gateway unit 7 is assigned one-to-one to the request. The gateway unit 7 regards itself as a host computer and transmits the connection sequence of the telnet protocol to the PC.
13 is established. When the connection sequence is normally performed, a session of the WAN line protocol, which is the protocol of the existing line, is established with the host computer 1 by using the logical unit information stored in the connection request. When a session is established in both the telnet protocol and the WAN protocol, the gateway unit 7 issues a reception request to both lines and waits for data.

Next, referring to FIG.
Will be described when data is received from the host computer 1. First, the distributed processing computer 3 checks what data is received. If the data is confirmed, the header of the WAN protocol is checked, whether the data is independent or continuous, and the beginning, middle, and end of the data are recognized and stored in the table. After that, the header of the WAN protocol is converted into the header of the telnet protocol. The data is P
It is sent to C13 as it is. In the case of the single data or the last data, an EOR mark, which is an end instruction, is embedded in the data and transmitted to the PC 13, and then a timing mark of the telnet protocol is created and transmitted to the PC 13. Thereby, the PC 13 can determine the end of the received data.

If the checked data is other than data, a check is made to determine whether a response or disconnection request from the host computer 1 in accordance with the WAN protocol. In the case of a response, a timing mark according to the telnet protocol is created and transmitted to the PC 13. In the case of a disconnection request, the connection with the host computer 1 is disconnected by the WAN protocol (NHF
H UNBIND), and after completion, t
Disconnect processing is performed using the elnet protocol. After the disconnection is completed, the gateway unit 7 is deleted from the memory.

FIG. 4 shows that the distributed processing computer 3 is a PC 13
This explains the processing when data is received from the. First, the received data is checked for something. If it is confirmed that the data is data, the inside of the data is checked. If the end code (EOR) is present or not, it is regarded as the beginning of continuous data. A first header of the WAN protocol is added, and transmitted to the host computer 1. Next, if there is no end code in the received data, it is regarded as the middle of continuous data, and a middle header of the WAN protocol is added to the received data and transmitted to the host computer 1. Until an end code is found in the received data, all subsequent data is regarded as intermediate and processed. If an end code is found in the received data in this flow, the corresponding data is regarded as the end of the continuous data, and a last header of the WAN protocol is attached to the data and transmitted to the host computer 1. When a response (response) is received from the host computer 1 with respect to the end of the continuous data, a timing mark of the telnet protocol is created and sent to the PC 13 so that the PC 13
Can also recognize that data has been successfully transmitted.

If the checked data is other than data, a check is made as to whether it is a telnet protocol timing mark or a disconnection request. In the case of a timing mark, a WAN protocol response is created and the host computer 1
Send to In the case of a disconnection request, t
host computer 1 after disconnecting with the elnet protocol
Is disconnected by the WAN protocol. After the disconnection is completed, the gateway unit 7 is deleted from the memory.

FIG. 5 shows that the host computer 1 is connected to the PC 1
3 and FIG. 6 show a data exchange sequence in each case of transmitting data from the PC 13 to the host computer 1.

The details of the numbered parts in the flowcharts shown in FIGS. 3 and 4 will be described below with reference to FIGS. In FIG. 3, S31 is a module for converting the data sent from the host computer 1 to the PC 13 from the WAN protocol to the telnet protocol, and here converts the data header portion. S32 is a module for checking the chain of the data. The received data is independent, the head of continuous data (FIC), the middle (MIC),
Investigate whether it is the last (LIC). S33 is a process for sending data to the PC 13, in which the converted data and te
lnet protocol timing mark (TM) to PC
13 is transmitted. Collect communication history of transmission communication data at the time of data transmission. S34 is a process of transmitting data to the PC 13, and transmits the converted data to the PC 13. Collect communication history of transmission communication data at the time of data transmission. S35 is a module for determining other than data, and determines a response and a disconnection request. S36 is a cutting process, and W
After performing disconnection processing (UNBIND) of the AN protocol, the disconnection is notified to the PC after completion. In step S37, the response to the PC 13 sent from the host computer 1 is converted from the WAN protocol to a timing mark of the telnet protocol and transmitted to the PC 13.

In FIG. 4, S41 is a module for converting data sent from the PC 13 to the host computer 1 from the telnet protocol to the WAN protocol.
Here, the data header part is converted. S42 is a module for checking an end code (EOR) in the data. Here, it is checked whether the received data is the last data (EO).
RTM). S43 is a process of sending data having continuation to the host computer 1. The header portion of the data to be transmitted to the host computer 1 is provided with a first or intermediate code (FIC / MIC). S44 is a process of sending data for which a response is expected to the host computer 1. The header portion of the data to be transmitted to the host computer 1 is attached with a code of sole or end. S45 is a module for processing a response from the host computer 1, and sends a timing mark to the PC after receiving the response.
S46 is a module for determining other than data, and determines a response and a connection / disconnection request. S47 is a cutting process and W
After disconnecting the AN protocol, the PC is notified of disconnection (UNBIND) after completion. A connection process 48 performs a WAN protocol connection process (BIND). S4
Reference numeral 9 denotes a module for converting a timing mark into a response to the host computer 1 and transmitting the response.

Finally, the communication history collecting process will be described.

In the embodiment of the present invention, a trace mechanism for collecting the communication history of the telnet protocol with the PC 13 in the external storage of the distributed processing computer 3 is constructed.
FIG. 1 shows a communication history file 10. The tracing mechanism is obtained by collecting interface inputs and outputs between the above-described communication protocol conversion mechanism and the TCP / IP firmware 14, which are constructed on the distributed processing computer 3. The TCP / IP firmware 14 is mounted on the LAN board 11 and is a program for specifically realizing the telnet protocol. In the communication history, one input / output is treated as one record, an IP address is added to the header, and “→” (right arrow) is applied to data from the host computer 1 to the PC 13, and “→” is applied to data from the PC 13 to the host computer 1. By adding "←" (left arrow), the same visibility as the analyzer was realized. Conventionally, in order to investigate user data on the LAN line 12, a dedicated analyzer is prepared for the LAN line 12 and the data is investigated by attaching it. Since the communication history is collected on the above external storage, it is possible to check for illegal data and detect a line failure without installing a specific device.

[0027]

As described above, according to the present invention, the host computer is connected to the distributed processing computer via the LAN similarly to the terminal used as the host terminal on the distributed processing computer connected by the WAN line. This realizes that the PC of the vendor uses the TCP / IP protocol as a host terminal, does not require expensive hardware, and the host computer uses the TCP / IP.
Since there is no need to be aware of the IP and the connection environment with the existing distributed processing computer can be used as it is, there is no need to change any other hardware environment and software environment. In addition, TCP is also used in a PC serving as a host terminal.
Since the connection is made by the / IP (telnet) protocol, the PC of each vendor and the terminal emulator of each vendor can be used as they are.

Further, the present invention has a mechanism for collecting a telnet protocol communication history with a PC in an external storage of the distributed processing computer, and a communication protocol conversion gateway mechanism on the distributed processing computer and a TCP / IP firmware. The communication history is treated as one record for each I / O, an IP address is added to a header part, and data from the host computer to the PC is included in the communication history.
By adding “←” (left arrow) to the data from the PC to the host computer →→ (right arrow), the same visibility as the analyzer was realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart cited for explaining the operation of the embodiment of the present invention.

FIG. 3 is a flowchart cited for explaining the operation of the embodiment of the present invention.

FIG. 4 is a flowchart cited for explaining the operation of the embodiment of the present invention.

FIG. 5 is a diagram cited for explaining the operation of the embodiment of the present invention, and is a diagram showing a data exchange sequence when data is transmitted from the host computer to the PC.

FIG. 6 is a diagram cited for explaining the operation of the embodiment of the present invention, and is a diagram showing a data exchange sequence when data is transmitted from a PC to a host computer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Host computer, 2 ... WAN line, 3 ... Distributed processing computer, 4 ... Logical multiplexing apparatus, 5 ... Communication protocol conversion apparatus, 6 ... Server part, 7 ... Gateway part, 8 ...
Mailbox, 9 Environment setting parameters, 10 Tracer, 11 LAN communication board, 12 LAN line, 1
3. Multi-vendor PC.

Claims (13)

[Claims] A host computer connected to the host computer via a WAN line, a distributed processing computer that exchanges data according to a first protocol, and a distributed processing computer connected via a LAN line;
The distributed processing computer comprises at least one multi-vendor PC for performing data exchange in accordance with the protocol described above, and performs bidirectional protocol conversion on exchanged data in accordance with the first and second protocols supported by the respective computers. A communication network system for exchanging data between multi-vendor PCs. 2. The communication network according to claim 1, wherein the second protocol is a TCP / IP protocol supported by the multi-vendor PC, and the multi-vendor PC functions as a terminal of the host computer via the distributed processing computer. system. 3. A distributed processing computer connected to the host computer via a WAN line, exchanging data according to a first protocol, and a distributed processing computer connected via a LAN line,
In a communication network system including at least one multi-vendor PC that performs data exchange according to the above-mentioned protocol, the distributed processing computer receives a data exchange request issued from the multi-vendor PC by a built-in server, and for each request, Allocate a gateway, create an information exchange area in memory, establish a connection sequence according to the protocol of each line based on the information written in the information exchange area by the built-in gateway, and convert the received data to a data format according to each protocol A protocol conversion method in a communication network system, wherein data is transmitted to a host computer or a multi-vendor PC while converting. 4. The server refers to an environment definition parameter in which a communication environment is set in advance and expands the memory in a memory,
Receives a connection request from the multi-vendor PC, checks whether the above environment is met, allocates a gateway for processing each request, creates an information exchange area and writes information,
4. The method according to claim 3, wherein the gateway is activated. 5. The gateway checks the data transmitted from the host computer, and if the data is confirmed, checks the header according to the first protocol, and further recognizes the continuity of the data and stores it in a table. 4. A protocol conversion method in a communication network system according to claim 3, wherein said header is converted into a header conforming to a second protocol, and the data is transmitted to a multi-vendor PC with an end code added. 6. The gateway checks data transmitted from the host computer, and if it is confirmed that the data is not data, checks whether the response is from the host computer according to the first protocol or a disconnection request. A timing mark according to a second protocol is generated and transmitted to a PC. In the case of a disconnection request, disconnection with a host computer is performed according to a first protocol, and then disconnection with a PC is performed according to a second protocol. 4. The protocol conversion method in a communication network system according to claim 3, wherein: 7. The gateway checks the data transmitted from the multi-vendor PC, and if it is confirmed that the data is data, the gateway considers the data as continuous data unless it checks the end code of the data and follows the first protocol. A header is added and transmitted to the host computer, and when a response is received from the host computer at the end of the continuous data, a timing mark according to the second protocol is generated and transmitted to the requested multi-vendor PC. 4. The method according to claim 3, wherein the protocol is converted. 8. The gateway checks data transmitted from the multi-vendor PC, and when it is confirmed that the data is not data, checks whether the request is a timing mark or a disconnection request according to the second protocol. A response according to the first protocol is created and transmitted to the host computer.
4. The protocol conversion method according to claim 3, wherein the connection with the host computer is disconnected according to the first protocol after disconnecting the connection with C according to the second protocol. 9. A distributed processing computer that exchanges data according to a first protocol, wherein the distributed processing computer exchanges data according to a first protocol, and a distributed processing computer that is connected via a LAN circuit.
The distributed processing computer comprises at least one multi-vendor PC for performing data exchange in accordance with the protocol described above, and performs bidirectional protocol conversion on exchanged data in accordance with the first and second protocols supported by the respective computers. Protocol conversion means for exchanging data between multi-vendor PCs, connection processing according to the first and second protocols, and tracing means for collecting a communication history of the received data and waiting for the arrival of the received data and recording it in a nonvolatile memory. A communication network system, comprising: 10. A distributed processing computer connected to a host computer via a WAN line and exchanging data according to a first protocol, and a distributed processing computer connected via a LAN line to a second protocol. In the communication network system comprising at least one multi-vendor PC performing data exchange according to the above, the distributed processing computer receives a data exchange request issued from the multi-vendor PC by a built-in server, and establishes a gateway for each request. Creates an information exchange area on the memory by allocating the information, attempts connection processing according to the first and second protocols based on the information written in the information exchange area by the built-in gateway, and stores the history of the connection sequence according to the second protocol. Collect and receive A protocol conversion method in a communication network system, wherein a communication history of data transmitted from a multi-vendor PC to a host computer is collected after waiting for incoming communication data. 11. A communication history is collected by recording in a non-volatile memory a unit of input / output between a gateway and firmware for realizing a second protocol, and a second protocol is added to a header part of the history data. 11. The protocol conversion method in a communication network according to claim 10, further comprising adding an address in accordance with the following, and adding a symbol indicating a data propagation direction between the host computer and the multi-vendor PC. 12. A distributed processing computer connected to a host computer via a WAN line and exchanging data according to a first protocol, and a distributed processing computer connected via a LAN line to a second protocol. Is a protocol conversion method in a communication network system including at least one multi-vendor PC for performing data exchange according to the following, wherein a server receives a data exchange request issued from the multi-vendor PC, and allocates a gateway for each request. An information exchange area is created in the memory, a connection sequence according to the protocol of each line is established based on the information written in the information exchange area by the gateway, and the host controller converts the received data into a data format according to the respective protocol. Computer or multi-vendor P
A recording medium characterized by being programmed and recorded to transmit data to C. 13. A distributed processing computer connected to a host computer via a WAN line and exchanging data according to a first protocol, and a distributed processing computer connected via a LAN line to a second protocol. Is a protocol conversion method in a communication network system including at least one multi-vendor PC that performs data exchange according to the following, and receives a data exchange request issued from the multi-vendor PC by a server built in the distributed processing computer, A gateway is allocated for each request to create an information exchange area on the memory, and first and second information are written based on the information written in the information exchange area by the built-in gateway.
And records the communication history of the data transmitted from the multi-vendor PC to the host computer after waiting for the arrival of the received data, while collecting the connection sequence history according to the second protocol. A recording medium characterized in that: