JP2009053770A - Communication control device, communication control method and communication control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a processing load on a processor and handle various protocols. <P>SOLUTION: A communication control device comprises a TOE for protocol-processing transmission data for transmission in a predetermined protocol and transmitting the transmission data in the predetermined protocol, a protocol analysis processing part for protocol-processing transmission data in accordance with a request from a socket, network devices for transmitting the protocol-processed transmission data, a protocol determination part for determining whether or not the transmission data transmission request from the socket is transmission using the predetermined protocol processable in the TOE, a TOE delivery part for delivering the transmission data to the TOE if it is determined that the predetermined protocol is used for the transmission, and a protocol layer delivery part for delivering the transmission data to a protocol layer if it is determined that another protocol is used. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a communication control apparatus, a communication control method, and a communication control program that perform communication control using a TOE.

  2. Description of the Related Art Conventionally, in a network environment including the Internet, there has been a tendency for high-speed and complicated networks. Along with this trend, the network server used in the network environment tends to increase the processing load in addition to the originally intended data processing, because the processing for transmitting and receiving data via the network increases. .

  In recent years, a technique called TOE (TCP / IP offload engine) has been proposed in order to reduce the load of network processing in the network server. This technology called TOE is a hardware that implements network protocol processing and network protocol checksum processing that place a high load on the CPU. And the said hardware performs a part or all of network processing, and reduces the load of CPU of a network server.

  For example, in the technique described in Patent Document 1, a server apparatus including a processor that can offload TCP protocol processing in addition to a host processor that processes a request from a user has been proposed.

  When hardware is implemented using the TOE in this way, the hierarchical model of the network has a structure as shown in FIG. As shown in FIG. 16, the layer below the socket layer is one layer realized by hardware.

  Since such TOE technology is implemented as hardware, it is not realistic to support all existing protocol layer protocols. For this reason, the TOE currently supports only TCP, UDP, IP and ICMP protocols. When processing these protocols, the processing load on the CPU can be reduced by hardware offload.

JP 2005-316629 A

  However, in the current PC architecture, the above-described protocol is not the only protocol used when communicating over a network. For example, when NetBSD is used for the OS, various protocols such as AppleTalk (registered trademark) are supported.

  In this way, the NetBSD kernel can support various protocols because the network hierarchy model is composed of the socket layer, protocol layer, interface layer, and network device under the network program, and each layer is implemented by software. This is because it has been realized.

  That is, in the apparatus using the TOE, the processing load of the CPU can be reduced by using a network device connected in hardware, but there is a problem that various network protocols cannot be used for this purpose.

  The present invention has been made in view of the above, and an object of the present invention is to provide a communication control device, a communication control method, and a communication control program that can reduce the processing load on the processor and use various protocols. To do.

  In order to solve the above-described problems and achieve the object, a communication control apparatus according to the present invention performs a protocol process for transmitting data according to a predetermined protocol, and transmits the transmission data to the predetermined data. The hardware communication device control unit, which is a hardware-connected circuit that performs transmission using a protocol, and software that performs protocol processing according to requests from sockets assigned to each network program for transmission data A protocol processing unit, a communication device control unit that transmits the transmission data that has been subjected to the protocol processing by the protocol processing unit, and a transmission request for transmission data from the socket is transmitted by the hardware communication device control unit. Whether or not the transmission is performed using the predetermined protocol that can be processed A protocol determination unit for refusing, and hardware that transfers the transmission data requested to be transmitted from the socket to the hardware transmission device control unit when it is determined that the transmission is performed using the predetermined protocol. A device delivery unit; and a protocol delivery unit that delivers the transmission data requested to be transmitted from the socket to the protocol processing unit when it is determined to be other than the predetermined protocol.

  When the communication control device according to the present invention performs control to receive received data from an external network, determines whether the received data can be analyzed by a predetermined protocol, and determines that analysis is possible A hardware communication device control unit that is a hardware-connected circuit that performs analysis processing according to the predetermined protocol and delivers the received data after the protocol analysis processing to a socket, and the hardware communication device control unit A hardware communication interface unit that acquires the received data when it is determined that the analysis process is not possible with the predetermined protocol, and a protocol analysis process for the received data acquired by the hardware communication interface unit, For the received data after protocol analysis processing Characterized in that it and a protocol processing unit can be realized by software.

  In addition, the communication control method according to the present invention provides a predetermined protocol that allows a hardware transmission device control unit, which is a hardware-connected circuit, to process transmission data transmissions from a socket assigned to each network program. A protocol determination step for determining whether or not the transmission is used, and the transmission data requested to be transmitted from the socket when the transmission is determined to be transmission using the predetermined protocol, the hardware transmission device A hardware device delivery step for delivering to the control unit; and the hardware communication device control unit performs a protocol process for transmitting the transmission data using the predetermined protocol, and transmits the transmission data to the predetermined unit. Hardware communication device control module that transmits data using other protocols And a protocol delivery step of delivering the transmission data requested to be transmitted from the socket to a protocol processing unit when the protocol determination step determines that the protocol other than the predetermined protocol, and the protocol processing unit A protocol processing step for performing protocol processing on the transmission data in accordance with a request from the socket, and a communication device control step for transmitting the transmission data on which the protocol processing has been performed. And

  Further, the communication control method according to the present invention controls the hardware communication device control unit, which is a hardware-connected circuit, to receive reception data from an external network, and transmits the received reception data to a predetermined protocol. A hardware communication device control step for performing analysis processing according to the predetermined protocol when it is determined that analysis is possible, and delivering the received data after protocol analysis processing to a socket; A hardware communication interface step for acquiring the received data when it is determined in the hardware communication device control step that analysis processing is not possible with the predetermined protocol, and for the received data acquired by the hardware communication interface step Protocol analysis processing, Characterized in that it and a protocol processing step of passing the received data after the protocol analysis processing on the packet.

  In addition, the communication control program according to the present invention provides a predetermined protocol that allows a hardware transmission device control unit, which is a hardware-connected circuit, to process a transmission request for transmission data from a socket assigned to each network program. A protocol determination step for determining whether or not the transmission is used, and the transmission data requested to be transmitted from the socket when the transmission is determined to be transmission using the predetermined protocol, the hardware transmission device A hardware device delivery step for delivering to the control unit; and the hardware communication device control unit performs a protocol process for transmitting the transmission data using the predetermined protocol, and transmits the transmission data to the predetermined unit. Hardware communication device that transmits using any protocol And a protocol delivery step of delivering the transmission data requested to be transmitted from the socket to a protocol processing unit when the protocol determination step determines that the protocol is other than the predetermined protocol, and the protocol processing unit Causes the computer to execute a protocol processing step for performing protocol processing on the transmission data in accordance with a request from the socket, and a communication device control step for transmitting the transmission data subjected to the protocol processing. .

  In addition, the communication control program according to the present invention controls the hardware communication device control unit, which is a hardware-connected circuit, to receive the received data from the external network, and transmits the received data to a predetermined protocol. A hardware communication device control step for performing analysis processing according to the predetermined protocol when it is determined that analysis is possible, and delivering the received data after protocol analysis processing to a socket; A hardware communication interface step for acquiring the received data when it is determined in the hardware communication device control step that analysis processing is not possible with the predetermined protocol, and for the received data acquired by the hardware communication interface step Protocol analysis And to execute the protocol processing step of passing the received data after the protocol analysis to the socket, to a computer.

  According to the present invention, the hardware communication device control unit reduces the processing load on the processor by performing protocol processing and transmission by a predetermined protocol, and various protocols can be used by performing protocol processing by software. Play.

  According to the present invention, the hardware communication device controller reduces the processing burden on the processor by performing protocol analysis processing and reception with a predetermined protocol, and various protocols can be used by performing protocol analysis processing with software. There is an effect.

  Exemplary embodiments of a communication control device, a communication control method, and a communication control program according to the present invention will be explained below in detail with reference to the accompanying drawings. In the following embodiment, an example in which the communication control device is applied to an information processing device will be described.

  FIG. 1 is a diagram illustrating a hardware configuration of the information processing apparatus 100 according to the embodiment. As shown in FIG. 1, the information processing apparatus 100 includes a CPU 101, a ROM 102, a RAM 103, an HDD 104, a TOE 105, a serial line I / F 106, a wireless LAN_I / F 107, and a USB_I / F 108. It has a hardware configuration using a computer.

  Then, the program stored in the ROM 102 or the HDD 104 is loaded on the RAM 103. Then, the CPU 101 performs processing using the loaded program.

  The CPU 101 performs communication control using the serial line I / F 106, the wireless LAN_I / F 107, and the USB_I / F 108 using the program.

  The technology used in the TOE 105 is to implement a network protocol process and a network protocol checksum process that apply a high load on the CPU. The hardware performs part or all of the network processing, thereby reducing the load on the CPU 101.

  The TOE 105 includes a wired LAN_I / F 109, performs communication control using the wired LAN_I / F 109, analyzes the received data with a predetermined protocol by hardware, and stores the data in, for example, the RAM 103. In the TOE 105, it is assumed that a plurality of network devices (hereinafter referred to as TOE network devices) are connected from the wired LAN_I / F 109.

  The TOE 105 has a function of detecting data of a protocol other than TCP / UDP / ICMP / IP and requesting processing to the outside along with the received data. Further, it is assumed that the TOE network device connected via the wired LAN_I / F 109 has a mechanism that can directly receive transmission data other than a configuration that performs protocol analysis by the TOE.

  Thus, in the information processing apparatus 100 according to the present embodiment, communication control by the TOE 105 and communication control by the serial line I / F 106, the wireless LAN_I / F 107, and the USB_I / F 108 are performed. Next, the software configuration of the information processing apparatus 100 will be described.

  FIG. 2 is a diagram showing the network of the information processing apparatus 100 in a layer structure. As shown in FIG. 2, the information processing apparatus 100 includes a user application layer 201, a socket layer 202, a wrapper layer 203, a protocol layer 204, an interface layer 205, a network device layer 206, a TOE interface layer 207, and a TOE 208. And.

  In the information processing apparatus 100, the socket layer 202, the protocol layer 204, and the interface layer 205 that are conventionally used can be almost used. This enables network processing implemented in OS kernels that are widely used. In the information processing apparatus 100, a new wrapper layer 203 and TOE interface layer 207 are added to allow coexistence of network processing by conventional software and hardware offload by the TOE 208.

  The user application layer 201 includes network programs 211a to 211c that can be used by the user. And each network program 211a-c requests | requires a communication process with respect to the socket layer 202 mentioned later, when communicating.

  The socket layer 202 is a layer that holds sockets 212a to 212c, which are descriptors that summarize information related to network connections. The socket layer 202 hides the interface to the protocol layer 204 from the network programs 211a to 211c of the user application layer 201, and provides an end point of a network connection service.

  One or more sockets 212a to 212c are created for each network program 211a to 211c of the user application layer 201. In addition, when a socket is created, a protocol used for communication is set. In this way, the sockets 212a to 212c hold the association with the above-described network programs 211a to 211c, the address to be transmitted / received, the protocol information used for transmission / reception, the information regarding the data to be transmitted / received, and the routing information used for transmission / reception. . When receiving an instruction to transmit to a predetermined IP address from the network or an instruction to wait for reception from the predetermined IP address, the sockets 212a to 212c transmit the instruction to the wrapper layer 203 described later. The destination wrapper layer 203 can refer to the protocol information or IP address held by each of the sockets 212a to 212c.

  The socket API used in the socket layer 202 is a de facto standard for network programming and can be used regardless of the OS.

  The wrapper layer 203 includes a protocol determination unit 221, a transmission-side TOE object identification unit 222, a protocol layer delivery unit 234, and a TOE delivery unit 235, and holds an existing I / F for the socket layer 202 is doing. Further, when a data transmission request is made from the socket layer 202, the wrapper layer 203 requests a protocol process from the protocol layer 204 or performs a protocol process to the TOE 208 according to a protocol used for transmitting the data. Request or switch.

  When a transmission request is made from the sockets 212a to 212c, the protocol determination unit 221 determines whether or not protocol processing is possible in the TOE 208 from the protocol information held by the sockets 212a to 212c.

  When the protocol determination unit 221 determines that the protocol processing is not possible in the TOE 208, the protocol layer transfer unit 234 transfers data to be transmitted to the protocol layer 204 and requests protocol processing of the data.

  On the other hand, when the protocol determining unit 221 determines that the protocol processing is possible with the TOE 208, the transmitting-side TOE object specifying unit 222 uses the TOE interface management table 229 to sequentially refer to the information held by the TOE interface object 231. The network device 233a-b in the TOE 208 determines whether data transmission is possible. Detailed processing will be described later.

  When the transmission-side TOE object specifying unit 222 determines that data can be transmitted by the network devices 233a and 233b in the TOE 208, the TOE delivery unit 235 delivers the data to be transmitted to the TOE delivery unit 235 and the data Request protocol processing.

  The TOE interface management table 229 stores information (object pointer) for specifying a TOE interface object 231 described later. In the present embodiment, a pointer is used as information for specifying each object, but other information such as a hash may be used. That is, the TOE interface object 231 can be accessed by referring to the TOE interface management table 229. The TOE interface management table 229 can be referenced from the wrapper layer 203 and the TOE interface layer 207.

  The protocol layer 204 includes a protocol analysis processing unit 223, a protocol-specific reception buffer 224, and an object specifying unit 225. Data transmission / reception control with the socket layer 202 existing at the upper level, and interface layer 205 existing at the lower level Performs data transmission / reception control. Further, the socket layer 202 and the interface layer 207 are completely separated by the protocol layer 204, and processing can be performed without being aware of each other.

  The protocol-specific reception buffer 224 temporarily stores reception data received from the interface layer 205 or the TOE interface layer 207 for each protocol.

  The protocol analysis processing unit 223 performs protocol processing for transmitting communication data. Protocol processing refers to processing such as generating a packet according to the format of the protocol from the communication data in order to transmit the communication data using an arbitrary protocol.

  Further, the protocol analysis processing unit 223 performs protocol analysis processing on the received data. This protocol analysis processing refers to processing such as reading data (packets) stored in the protocol-specific reception buffer 224 and acquiring stored data from a packet in the format of the protocol.

  In addition, the protocol analysis processing unit 223 can use any protocol that can be protocol-processed or protocol-analyzed, for example, any protocol currently supported by NetBSD.

  The object specifying unit 225 specifies the interface object 227 or the TOE interface object 231 that delivers data after performing the protocol processing. The object specifying unit 225 refers to the interface management table 226, accesses each interface object 227 or the TOE interface object 231, and specifies the interface object 227 or the TOE interface object 231 that can be controlled for transmission.

  In the interface management table 226, the pointer of the interface object 227 and the pointer of the TOE interface object 231 are stored without distinction. Therefore, the object specifying unit 225 does not need to recognize whether the object points to the TOE network devices 233a to 233b on the TOE 208 side or the network devices 228a to 228c on the network device layer 206, and these interface objects 227 or TOE interface objects 231 are not necessary. Can be accessed.

  Then, an interface for transferring data to the (TOE) network device of the interface object 227 or the TOE interface object 231 specified by the object specifying unit 225 is called from the protocol layer 204. Thereby, data can be delivered to the (TOE) network device. It is assumed that the interface for handing over the interface object 227 and the TOE interface object 231 is common, and the difference between devices is hidden.

  The interface layer 205 is a layer existing between the lower network device layer 206 and the protocol layer 204. The interface layer 205 abstracts the hardware included in the network device layer 206, thereby hiding specific hardware and providing an API for each hardware.

  The interface layer 205 includes an interface object 227. The interface object 227 is a memory object that is assigned on a one-to-one basis for each physical network device. The interface object 227 includes hardware information of the network device, access destination address information, and an interface for accessing the network device. Accordingly, the assigned network device can be controlled by operating the interface object 227.

  An interface management table 226 is provided between the protocol layer 204 and the interface layer 205. The interface management table 226 stores information (object pointers) for specifying an interface object 227 and a TOE interface object 231 described later. In the present embodiment, a pointer is used as information for specifying each object, but other information such as a hash may be used. This interface management table 226 can be referred to from the protocol layer 204 and the interface layer 205.

  FIG. 3 is an explanatory diagram showing the relationship between the interface management table 226 and the interface object 227. As shown in FIG. 3, the interface object can be specified by referring to the object pointer registered in the interface management table 226. Further, every time an interface object is created and deleted, the interface layer 205 registers and deletes a record in the interface management table 226. Note that the pointer of the TOE interface object 231 is also registered in the interface management table 226, details of which will be described later.

  The network device layer 206 includes a first network device 228a, a second network device 228b, and a third network device 228c, and transmits and receives to / from an external network. The received data is transferred to the interface object 227 of the interface layer 205.

  The TOE 208 includes a protocol analysis circuit 232, a first TOE network device 233a, and a second TOE network device 233b, and is a circuit connected by hardware. Between the protocol processing and protocol analysis processing according to a predetermined protocol and an external network Communication control. Thereby, the TOE 208 can perform hardware offload of a predetermined protocol (for example, TCP / IP) in which the processing data amount and the speed tend to increase.

  The protocol analysis circuit 232 performs protocol processing according to a predetermined protocol in order to transmit communication data input from the wrapper layer 203. Further, when the first TOE network device 233a or the second TOE network device 233b receives communication data, the protocol analysis circuit 232 performs protocol analysis processing using a predetermined protocol. Protocols that can be protocol-processed and protocol-analyzed by the protocol analysis circuit 232 are TCP, UDP, IP, and ICMP.

  When the protocol analysis circuit 232 determines that the protocol of the received data is other than TCP, UDP, IP, and ICMP, the protocol analysis circuit 232 requests the TOE interface layer 207 for protocol analysis processing together with the received data.

  The first TOE network device 233a and the second TOE network device 233b are connected by hardware, and are devices for transmitting and receiving with an external network.

  The TOE interface layer 207 includes a receiving-side TOE object specifying unit 230 and a TOE interface object 231 and serves as an interface for connecting the TOE 208 to other components.

  The receiving-side TOE object specifying unit 230 specifies a TOE interface object 231 that processes data that could not be subjected to protocol analysis processing by the TOE 208. The receiving-side TOE object specifying unit 230 refers to the TOE interface management table 229, accesses each TOE interface object 231, and specifies the TOE interface object 231 corresponding to the received network device.

  The TOE interface object 231 is associated with each network device included in the TOE 208 on a one-to-one basis. The TOE interface object 231 holds the same information as the interface object 227 and can control the associated network device. Further, the TOE interface object 231 is an interface for performing protocol analysis processing in the protocol layer 204 when the protocol analysis processing fails in the TOE 208.

  FIG. 4 is a diagram showing the class structure of the interface class 401 and the TOE interface class 402. As shown in FIG. 4, the interface class 401 includes address information and hardware information as attributes. This address information stores an IP address that is transmitted and received by the associated network device. The hardware information stores information related to the assigned network device. Further, these attributes are disclosed to the outside so as to be understood from the fact that the “+” symbol is attached to the left side of the attributes in FIG. In addition, other operations are also disclosed to the outside when the “+” symbol is attached.

  The interface class 401 includes, as operations, access control () for hardware and drivers, and transfer control () for transmitting data from the protocol layer to the network device. With these operations, the network device can be used.

  The TOE interface class 402 inherits the interface class and includes an input / output interface () for protocol analysis processing as an operation. By using this operation, the data received by the TOE 208 can be output to the protocol layer 204.

  By instantiating these interface class and TOE interface class, an interface object 227 and a TOE interface object 231 are generated, and the above-described attributes and operations can be used.

  In the information processing apparatus 100 according to the present embodiment, a corresponding TOE interface object 231 is generated when the first TOE network device 233a and the second TOE network device 233b are automatically detected at startup. Similarly, the interface object 227 is generated with automatic detection at the time of activation.

  The generated pointer of the TOE interface object 231 is registered in the interface management table 226 and the TOE interface management table 229, and the pointer of the interface object 227 is registered in the interface management table 226.

  Accordingly, by accessing the TOE interface object 231 from the pointer stored in the TOE interface management table 229, information on the TOE network devices 233a to 233b included in the TOE 208 can be referred to.

  Further, by accessing the TOE interface object 231 from the pointer stored in the interface management table 226, information on the TOE network devices 233a-b included in the TOE 208 can be referred to. Similarly, by accessing the interface object 227 from the pointer stored in the interface management table 226, information on the network devices 228a to 228c included in the network device layer 206 can be referred to.

  FIG. 5 is an explanatory diagram showing an interface management table of registration destinations of the interface object 227 and the TOE interface object 231. As shown in FIG. 5, the interface management table 226 stores pointers that can refer to each interface object 227 and each TOE interface object 231. As a result, the data after the protocol processing is completed in the protocol layer 204 can be output to both the network devices 228a to 228c of the network device layer 206 and the TOE network devices 233a to 233b of the TOE 208.

  With such a configuration, in the information processing apparatus 100, the network program 211a to 211c of the user application layer 201 is passed through the socket layer 202 to the uppermost layer and then passed through the wrapper layer 203 and the protocol layer 204 and Since the TOE 208 can be accessed, protocol processing can be switched.

  Next, the registration procedure of the address information of the TOE interface object 231 in the TOE interface layer 207 according to this embodiment configured as described above will be described. FIG. 6 is a flowchart showing the above-described processing procedure in the TOE interface layer 207 according to the present embodiment.

  First, the TOE interface layer 207 accepts an IP address assignment to the TOE network device in response to a request from the outside (step S601). Note that the term “external” refers to the sockets 212a to 212c connected through the wrapper layer 203, the TOE 208, and the like.

  Then, the TOE interface layer 207 determines whether or not there is a pointer pointing to the TOE interface object 231 that has not been confirmed in the TOE interface management table 229 (step S602). If it is determined that there is not (step S602: No), the processing is terminated assuming that the corresponding TOE network device does not exist.

  Next, when the TOE interface layer 207 determines that there is a pointer (step S602: Yes), the TOE interface object 231 refers to the hardware information of the TOE interface object 231 pointed to by the pointer, and the TOE interface object 231 assigns the network to which it is assigned. It is determined whether the device is a device (step S603). If it is determined that the network device is not the allocation destination network device (step S603: No), the processing starts again from step S602.

  If the TOE interface layer 207 determines that the TOE interface object 231 is an allocation destination network device (step S603: Yes), the TOE interface layer 207 performs an additional setting of the IP address in the address information of the TOE interface object 231 (step S604). ). As a result, the IP address is appropriately assigned.

  Next, a procedure for releasing the address information of the TOE interface object 231 in the TOE interface layer 207 according to the present embodiment configured as described above will be described. FIG. 7 is a flowchart showing the above-described processing procedure in the TOE interface layer 207 according to the present embodiment.

  First, the TOE interface layer 207 accepts the release of an IP address to the TOE network device in response to a request from the outside (step S701).

  Then, the TOE interface layer 207 determines whether or not there is a pointer pointing to the TOE interface object 231 that has not been confirmed in the TOE interface management table 229 (step S702). If it is determined that there is not (step S702: No), it is determined that the corresponding TOE network device does not exist, and the process ends.

  Next, when the TOE interface layer 207 determines that there is a pointer (step S702: Yes), the TOE interface object 231 refers to the hardware information of the TOE interface object 231 pointed to by the pointer, and the TOE interface object 231 is the address release destination. It is determined whether the device is a network device (step S703). If it is determined that the network device is not an open destination network device (step S703: No), the processing starts again from step S702.

  When the TOE interface layer 207 determines that the TOE interface object 231 is a network device to be opened (step S703: Yes), the corresponding IP address is deleted from the address information of the TOE interface object 231 (step S704). ). As a result, the IP address is appropriately deleted.

  Note that the assignment and release of the IP address to the interface object 227 are the same as in the past, and the description thereof is omitted.

  Next, transmission processing in the information processing apparatus 100 according to the present embodiment will be described. FIG. 8 is a flowchart showing the above-described processing procedure in the information processing apparatus 100 according to the present embodiment.

  First, the network programs 211a to 211c output data to be transmitted to the sockets 212a to 212c (step S801). next. The sockets 212a to 212c output data to be transmitted to the wrapper layer 203 (step S802).

  When the data to be transmitted is input to the wrapper layer 203, the protocol determination unit 221 of the wrapper layer 203 determines the protocol to be used based on the protocol information held by the output source sockets 212a to 212c, and then the protocol. Is a protocol (TCP / UDP / ICMP / IP) that can be processed by the TOE (step S803). If it is determined that the protocol can be processed (step S803: Yes), the TOE network device that performs transmission processing is specified with reference to the TOE interface management table 229 and the TOE interface object 231 (step S804).

  Next, the TOE delivery unit 235 delivers data to be transmitted to the TOE 208 and instructs the TOE 208 to transmit data to the input IP address from the identified TOE network device (step S805). . Details of the processing of the wrapper layer 203 shown in steps S803 to S805 will be described later.

  Then, the protocol analysis circuit 232 of the TOE 208 performs a protocol process for transmitting the input data using a predetermined protocol (step S806). Thereafter, the TOE network device (for example, the first TOE network device 233a) identified in step S804 transmits the data after the protocol processing to the instructed IP address (step S807).

  On the other hand, if the protocol determination unit 221 of the wrapper layer 203 determines that the protocol used for the input data is not a protocol (TCP / UDP / ICMP / IP) that can be processed by the TOE (step S803: No), the protocol The layer transfer unit 234 transfers data to be transmitted to the protocol layer 204 and requests protocol processing of the data (step S808).

  Then, the protocol analysis processing unit 223 of the protocol layer 204 performs protocol processing on the input data according to the input protocol information (step S809).

  Thereafter, the object specifying unit 225 of the protocol layer 204 refers to the interface management table 226, the interface object 227, and the TOE interface object 231 to specify the network devices 228a to 228c or the TOE network devices 233a to 233b that perform transmission processing ( Step S810). Then, the protocol layer 204 calls an operation of the interface object 227 or the TOE interface object 231 corresponding to the specified network device, and instructs transmission processing (step S811).

  Then, by the operation from the interface object 227 or the TOE interface object 231 instructed to transmit, the network devices 228a to 228c or the TOE network devices 233a to 233b transmit the data after the protocol processing to the instructed IP address. (Step S812).

  Next, the reception waiting or transmission processing in the wrapper layer 203 according to this embodiment configured as described above will be described. FIG. 9 is a flowchart showing the above-described processing procedure in the wrapper layer 203 according to the present embodiment. It is assumed that the reception waiting process is performed when the information processing apparatus 100 is activated.

  First, the wrapper layer 203 receives a request to the protocol layer 204 from the sockets 212a to 212c of the socket layer 202 (step S901). This request is a request for waiting for reception or data transmission. If the request is data transmission, the processing procedure is a detailed description of the processing in steps S803 and S804 in FIG.

  Next, the wrapper layer 203 determines a protocol to be used from the address information held by the sockets 212a to 212c that have made the request (step S902).

  Then, the protocol determination unit 221 of the wrapper layer 203 determines whether or not the determined protocol is a protocol (TCP / UDP / ICMP / IP) that can be processed by the TOE 208 (step S903). If it is determined that the protocol (TCP / UDP / ICMP / IP) that can be processed by the TOE 208 is not determined (step S903: No), the protocol layer 204 is instructed to wait for reception or transmit according to the request (step S904). .

  On the other hand, when the protocol determining unit 221 determines that the protocol (TCP / UDP / ICMP / IP) that can be processed by the TOE 208 (step S903: Yes), the transmitting-side TOE object specifying unit 222 determines that the TOE interface management table 229 is used. The processing after step S906 is repeated for the number of records (step S905). Each time the process is repeated, the record in the TOE interface management table 229 used in step S906 is changed.

  Next, the transmitting-side TOE object specifying unit 222 repeats the processing from step S907 onward for the number of addresses registered in the TOE interface object 231 indicated by the pointer of the record in the TOE interface management table 229 (step S906). Each time the process is repeated, the IP address set in the TOE interface object 231 used in step S907 is changed.

  Then, the transmitting-side TOE object specifying unit 222 determines whether or not the IP address set in the sockets 212a to 212c that made the request is the IP address set in the TOE interface object 231 indicated by the pointer ( Step S907).

  Next, the sending-side TOE object specifying unit 222 determines that the IP address set in the requesting socket 212a to 212c is not the IP address set in the TOE interface object 231 indicated by the pointer. In the case (step S907: No), the process is repeated again from step S906 (step S908).

  When the loop from step S906 to step S908 ends, the process is repeated from step S905 again (step S909).

  On the other hand, when the transmitting-side TOE object specifying unit 222 determines that the IP address set in the sockets 212a to 212c that made the request is the IP address set in the TOE interface object 231 indicated by the pointer ( In step S907: Yes), the wrapper layer 203 determines whether the accepted request is waiting for reception or transmission (step S910). The TOE network devices 233a-b corresponding to the TOE interface object 231 are specified as devices that perform transmission processing.

  If the wrapper layer 203 determines in step S910 that it is waiting for reception, it instructs the TOE 208 to wait for reception (step S911). In addition, if the IP address of the data receiving destination is specified in the request, the wrapper layer 203 instructs to receive from the IP address. If the IP address of the data receiving destination is not specified in the request, all the IP addresses Instruct to receive from address.

  On the other hand, if it is determined in step S910 that the wrapper layer 203 is transmitting, it is determined whether or not the IP address of the data transmission destination can be transmitted from the routing information set in the sockets 212a to 212c that output the request (step S912). . If it is determined that transmission is not possible (step S912: No), the processing is repeated from step S906 again (step S908).

  On the other hand, if the wrapper layer 203 determines that transmission is possible (step S912: Yes), the TOE delivery unit 235 delivers data to be transmitted to the TOE 208 and is input from the identified TOE network devices 233a-b. The TOE 208 is instructed to transmit data to the IP address (step S913). In response to the instruction, the processing from step S806 onward in FIG. 8 is performed.

  Next, the processing path when a transmission request is made from the network device layers 206a to 206c will be described. FIG. 10 is an explanatory diagram showing a processing path when the protocol processing is performed by a predetermined protocol (TCP / UDP / ICMP / IP) and transmitted from the first TOE network device 233a.

  First, it is assumed that data transmitted from the network program 211a is output (step S1001). In this case, the socket 212a outputs data to be transmitted to the wrapper layer 203 (step S1002). At this time, after the protocol determination unit 221 of the wrapper layer 203 determines a protocol to be used based on the protocol information held by the output source sockets 212a to 212c, the determined protocol is a predetermined protocol (TCP / UDP / ICMP). / IP).

  After determining that the protocol is the predetermined protocol, the wrapper layer 203 instructs the transmission-side TOE object identification unit 222 to identify the transmission-destination TOE network devices 233a and 233b (step S1003). Therefore, the transmitting-side TOE object specifying unit 222 refers to the TOE interface management table 229 and acquires the pointer of the TOE interface object 231 (step S1004). Next, the transmission-side TOE object specifying unit 222 refers to the address information of the TOE interface object 231 indicated by the pointer, and determines whether or not the TOE network device corresponding to the object is a transmission destination (step S1005). In this processing procedure, it is assumed that the first TOE network device 233a is determined as the transmission destination.

  After specifying the first TOE network device 233a as the transmission destination, the TOE delivery unit 235 delivers the data to be transmitted and instructs the protocol analysis circuit 232 to perform protocol processing (step S1006).

  After the protocol analysis circuit 232 ends the protocol processing, the first network device 233a determined as the transmission destination in the above-described processing is instructed to perform transmission processing (step S1007). As a result, data is transmitted from the TOE 208.

  FIG. 11 is an explanatory diagram showing a processing path when a protocol process other than a predetermined protocol (TCP / UDP / ICMP / IP) is performed and transmitted from the first network device 228a or the first TOE network device 233a.

  First, it is assumed that data transmitted from the network program 211a is output (step S1101). In this case, the socket 212a outputs the data to be transmitted to the wrapper layer 203 (step S1102). Then, after the protocol determination unit 221 of the wrapper layer 203 determines a protocol to be used based on the protocol information held by the output source socket 212a, the determined protocol is a predetermined protocol (TCP / UDP / ICMP / IP). It is assumed that it is not.

  Then, after it is determined that the protocol other than the predetermined protocol, the protocol layer delivery unit 234 delivers the data to be transmitted to the protocol layer 204, and the protocol analysis processing unit 223 of the protocol layer 204 transmits the protocol using the determined protocol. An instruction is given to perform processing (step S1103). Then, after the protocol analysis processing unit 223 completes the protocol processing, the protocol layer 204 instructs the object specifying unit 225 to specify the destination TOE interface object or interface object (step S1104). Therefore, the object specifying unit 225 refers to the interface management table 226 and acquires the pointer of the interface object 227 or the TOE interface object 231 (step S1105). Thereafter, there are a case where transmission is performed by the first network device 228a and a case where transmission is performed by the first TOE network device 233a based on the pointer referred to in the interface management table 226. First, a case where transmission is performed by the first network device 228a will be described.

  The object specifying unit 225 refers to the address information of the interface object 227 indicated by the pointer, and determines whether or not the network device corresponding to the object is a transmission destination (step S1106). Then, after specifying a network device as a transmission destination, the interface object 227 corresponding to the network device is instructed to perform transmission processing.

  Then, the interface object 227 instructs the corresponding first network device 228a to perform transmission processing (step S1107). Thereby, data is transmitted from the first network device 228a.

  Next, a case where transmission is performed by the first TOE network device 233a will be described. The object specifying unit 225 refers to the address information of the TOE interface object 231 indicated by the pointer, and determines whether or not the TOE network device corresponding to the object is a transmission destination (step S1108). Then, after specifying the TOE network device as the transmission destination, the TOE interface object 231 corresponding to the TOE network device is instructed to perform transmission processing.

  Then, the TOE interface object 231 instructs the corresponding first TOE network device 233a to perform transmission processing (step S1109). Thereby, data is transmitted from the first TOE network device 233a.

  Next, processing when data is received by the TOE 208 in the information processing apparatus 100 according to the present embodiment will be described. FIG. 12 is a flowchart showing the above-described processing procedure in the information processing apparatus 100 according to the present embodiment.

  First, the first TOE network device 233a performs data reception processing (step S1201).

  Next, the protocol analysis circuit 232 determines whether or not the received data is a predetermined protocol (TCP / UDP / ICMP / IP) that can be analyzed (step S1202).

  If the protocol analysis circuit 232 determines that the protocol is the predetermined protocol (step S1202: Yes), the analysis processing based on the predetermined protocol is performed on the received data (step S1203).

  Next, the TOE 208 outputs the data after the protocol analysis processing to the sockets 212a to 212c of the socket layer 202 (step S1204).

  On the other hand, when the protocol analysis circuit 232 determines that the protocol is not a predetermined protocol (step S1202: No), the TOE 208 outputs the received data to the TOE interface layer 207 (step S1205).

  Then, the receiving-side TOE object specifying unit 230 of the TOE interface layer 207 refers to the TOE interface object 231 from the pointer stored in the TOE interface management table 229, confirms the hardware information of the TOE interface object 231, and The TOE interface object 231 corresponding to the TOE network device 233a that has performed the reception process is specified (step S1206). The receiving-side TOE object specifying unit 230 outputs the received data to the specified TOE interface object 231.

  Next, the TOE interface object 231 outputs the input data and instructs the protocol layer 204 to perform a protocol analysis process on the data (step S1207).

  The protocol layer 204 temporarily stores the data input from the TOE interface object 231 to the protocol-specific reception buffer 224 for each designated protocol (step S1208).

  Then, according to the instruction, the protocol analysis processing unit 223 extracts the data stored in the protocol-specific reception buffer 224, and performs protocol analysis processing (step S1209). As a result, data used from the received packet can be extracted.

  Next, the protocol layer 204 outputs the data after the protocol analysis processing to the sockets 212a to 212c (step S1210).

  The sockets 212a to 212c output the input data to the network programs 211a to 211c associated with the sockets 212a to 212c (step S1211).

  With the processing procedure described above, it is possible to perform hardware offload for data received by the TOE 208 in the case of a predetermined protocol, and to perform analysis processing in the protocol layer 204 for protocols other than the predetermined protocol. It is possible.

  Next, a processing path when the first TOE network device 233a receives data will be described. FIG. 13 is an explanatory diagram showing a processing path when the first TOE network device 233a receives data and performs protocol analysis processing using a predetermined protocol (TCP / UDP / ICMP / IP).

  First, when the first network device 233a performs data reception processing, the first network device 233a instructs the protocol analysis circuit 232 to perform analysis processing (step S1301).

  Then, the protocol analysis circuit 232 determines that the analysis process is possible, performs the analysis process, and then outputs the data after the analysis process to the socket 212a (step S1302).

  Then, the socket 212a outputs the input data to the associated network program 211a (step S1303). By performing the processing described above, the network program 211a can receive data from the first TOE network device 233a.

  FIG. 14 is an explanatory diagram showing a processing path when the first TOE network device 233a receives data and performs protocol analysis processing using a protocol other than a predetermined protocol (TCP / UDP / ICMP / IP). .

  First, when the first network device 233a performs data reception processing, the first network device 233a instructs the protocol analysis circuit 232 to perform analysis processing (step S1401).

  If the protocol analysis circuit 232 determines that analysis processing cannot be performed, the received data is output to the TOE interface layer 207 (step S1402).

  Then, the receiving-side TOE object specifying unit 230 refers to the TOE interface management table 229 and acquires the pointer of the TOE interface object 231 (step S1403). Then, the receiving-side TOE object specifying unit 230 checks the hardware information of the TOE interface object 231 indicated by the acquired pointer, and specifies the TOE interface object 231 corresponding to the first TOE network device 233a that has received the data.

  Then, the receiving-side TOE object specifying unit 230 outputs the received data to the specified TOE interface object 231 (step S1404).

  Next, the TOE interface object 231 instructs the protocol layer 204 to output the input data and to perform a protocol analysis process on the data (step S1405). Thus, the input data is stored in the protocol-specific reception buffer 224 for each protocol.

  Then, the protocol analysis processing unit 223 acquires the data stored in the protocol-specific reception buffer 224 (step S1406). Thereafter, the protocol analysis processing unit 223 performs a protocol analysis process on the acquired data, and then outputs the analyzed data to the sockets 212a to 212c (step S1407).

  The sockets 212a to 212c output the input data to the network programs 211a to 211c associated with the sockets 212a to 212c (step S1408). According to the processing procedure described above, even when data that cannot be executed by the TOE is received, the protocol analysis processing can be appropriately performed.

  FIG. 15 is an explanatory diagram showing a processing path when the first network device 228a receives data and performs protocol analysis processing.

  First, when the first network device 228a performs data reception processing, the received data is output to the interface object 227 corresponding to the first network device 228a (step S1501).

  The interface object 227 stores the input data in the protocol-specific reception buffer 224 for each protocol (step S1502).

  Then, the protocol analysis processing unit 223 acquires the data stored in the protocol-specific reception buffer 224 (step S1503). Thereafter, the protocol analysis processing unit 223 performs a protocol analysis process on the acquired data, and then outputs the analyzed data to the sockets 212a to 212c (step S1504).

  Then, the sockets 212a to 212c output the input data to the network programs 211a to 211c associated with the sockets 212a to 212c (step S1505).

  In addition, the information processing apparatus 100 according to the present embodiment described above may be any OS as long as the software group that controls the network is an OS controlled by a layer structure. As an applicable OS, for example, NetBSD exists.

  As described above, the information processing apparatus 100 according to the present embodiment can coexist with an existing software protocol stack even when the TOE is provided.

  By the way, in the conventional information processing apparatus, since the socket layer and the interface layer cannot be referred to each other, it is possible to offload the hardware below the socket layer and do not pass through the hardware. When installed, it was impossible to distribute the data to be sent to an appropriate network device.

  On the other hand, in the information processing apparatus 100 according to the present embodiment, it is possible to use a network device other than the TOE network device mounted on the TOE hardware by providing the configuration as described above.

  Thereby, in the information processing apparatus 100 according to the present embodiment, by installing the TOE, hardware offload can be performed, the processing load on the CPU 101 can be reduced, and various protocols can be supported. .

  In the information processing apparatus 100 according to the present embodiment, various network devices can be used in addition to the TOE network device mounted on the TOE. Such network devices are not limited to the serial line I / F 106, the wireless LAN_I / F 107, and the USB_I / F 108 as in the present embodiment, and various network devices that are conventionally used may be applied. good.

  The communication control program executed by the information processing apparatus 100 according to the present embodiment is a file in an installable or executable format, such as a CD-ROM, a flexible disk (FD), a CD-R, a DVD (Digital Versatile Disk), or the like. And recorded on a computer-readable recording medium.

  Further, the communication control program executed by the information processing apparatus 100 of the present embodiment may be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network. Further, the communication control program executed by the information processing apparatus 100 of the present embodiment may be provided or distributed via a network such as the Internet.

  Further, the communication control program of the present embodiment may be provided by being incorporated in advance in a ROM or the like.

  The communication control program executed by the information processing apparatus 100 according to the present embodiment has a module configuration including the above-described units (user application layer, socket layer, protocol layer, interface layer, TOE interface layer). As hardware, the CPU reads the communication control program from the recording medium and executes it to load the above-described units onto the main storage device. The user application layer, socket layer, protocol layer, interface layer, and TOE interface layer are the main memory. It is generated on the device.

  As described above, the communication control device, the communication control method, and the communication control program according to the present invention are useful for communication control, and are particularly suitable for communication control using the TOE.

It is a figure showing hardware constitutions of an information processor concerning an embodiment. It is the figure which showed the software structure of information processing apparatus by the layer structure. It is explanatory drawing which showed the relationship between an interface management table and an interface object. It is the figure which showed the class structure of the interface class and the TOE interface class. It is explanatory drawing which showed the interface management table of the registration destination of an interface object and TOE interface object. It is a flowchart which shows the registration procedure of the address information of the TOE interface object in the TOE interface layer concerning an embodiment. It is a flowchart which shows the release procedure of the address information of the TOE interface object in the TOE interface layer concerning an embodiment. It is a flowchart which shows the procedure of the transmission process in the information processing apparatus concerning embodiment. It is a flowchart which shows the procedure of the reception waiting or transmission process in the wrapper layer concerning embodiment. It is explanatory drawing which showed the process path | route at the time of performing a protocol process by the predetermined protocol and transmitting from the 1st TOE network device in the information processing apparatus concerning embodiment. 6 is an explanatory diagram illustrating a processing path when a protocol process other than a predetermined protocol is performed and transmitted from the first network device or the first TOE network device in the information processing apparatus according to the embodiment. FIG. 6 is a flowchart illustrating a processing procedure when data is received by the TOE in the information processing apparatus according to the embodiment. 6 is an explanatory diagram illustrating a processing path when a first TOE network device receives data and performs a protocol analysis process using a predetermined protocol in the information processing apparatus according to the embodiment. FIG. FIG. 6 is an explanatory diagram illustrating a processing path when a first TOE network device receives data and performs a protocol analysis process using a protocol other than a predetermined protocol in the information processing apparatus according to the embodiment. 6 is an explanatory diagram illustrating a processing path when a first network device receives data and performs a protocol analysis process in the information processing apparatus according to the embodiment. FIG. It is explanatory drawing which showed the hierarchy model of the network in the information processing apparatus carrying the conventional TOE.

Explanation of symbols

100 Information processing apparatus 101 CPU
102 ROM
103 RAM
104 HDD
105 TOE
106 Serial line I / F
107 Wireless LAN_I / F
108 USB_I / F
109 Wired LAN_I / F
201 User application layer 202 Socket layer 203 Wrapper layer 204 Protocol layer 205 Interface layer 206 Network device layer 207 TOE interface layer 208 TOE
211a-c Network program 212a-c Socket 221 Protocol determination unit 222 Transmission-side TOE object specifying unit 223 Protocol analysis processing unit 224 Protocol-specific reception buffer 225 Object specifying unit 226 Interface management table 227 Interface object 228a First network device 228b Second network Device 228c Third network device 229 Interface management table 230 Receiving side TOE object specifying unit 231 TOE interface object 232 Protocol analysis circuit 233a First network device 233b Second network device

Claims (16)

A hardware communication device control unit, which is a hardware-connected circuit, performs a protocol process for transmitting the transmission data with a predetermined protocol, and transmits the transmission data with the predetermined protocol;
A protocol processing unit implemented in software that performs protocol processing according to a request from a socket assigned to each network program for transmission data;
A communication device control unit that transmits the transmission data subjected to the protocol processing by the protocol processing unit;
A protocol determination unit for determining whether a transmission request for transmission data from the socket is transmission using the predetermined protocol that can be protocol-processed by the hardware communication device control unit;
A hardware device delivery unit that delivers the transmission data requested to be transmitted from the socket to the hardware transmission device control unit when it is determined that the transmission is performed using the predetermined protocol;
A protocol delivery unit that delivers the transmission data requested to be transmitted from the socket to the protocol processing unit when determined to be other than the predetermined protocol;
A communication control apparatus comprising: The protocol processing unit performs protocol processing in accordance with a request from the socket on the transmission data in the protocol processing unit, and then the transmission destination of the transmission data is the hardware transmission device control unit or the communication Determining whether it is a device control unit, and passing the transmission data to the hardware transmission device control unit or the communication device control unit according to the determination result;
The communication control device according to claim 1. The hardware communication device control unit includes a plurality of hardware communication devices that transmit to an external network,
A plurality of hardware interface information holding units for each hardware communication device that holds address information that is permitted to be transmitted in the external network by the hardware communication device;
Hardware that identifies the hardware communication device that performs transmission based on the address information held by the hardware interface information holding unit when the protocol judging unit determines to perform transmission using a predetermined protocol A specific part,
The communication control device according to claim 1, further comprising: The communication device control unit includes a plurality of communication devices that transmit to an external network,
A plurality of interface information holding units for each network device that hold address information that is permitted to be transmitted in the external network by the network device;
The address information that the interface information holding unit and the hardware interface information holding unit hold the hardware communication device or the communication device used for transmission of the transmission data after the protocol processing is performed by the protocol processing unit. A specific part to be identified based on
The communication control apparatus according to claim 3, further comprising: An interface management storage unit that stores pointer information that points to the interface information holding unit and pointer information that points to the hardware interface information holding unit;
The specifying unit is specified based on the address information held by the interface information holding unit and the hardware interface information holding unit indicated by the pointer information stored in the interface management storage unit;
The communication control device according to claim 4.   6. The communication control apparatus according to claim 1, wherein the predetermined protocol is any one or more of TCP, UDP, IP, and ICMP. Performs control to receive data received from an external network, determines whether the received data can be analyzed by a predetermined protocol, and if it is determined that analysis is possible, performs analysis processing by the predetermined protocol, socket A hardware communication device controller that is a hardware-connected circuit that delivers the received data after the protocol analysis processing to
A hardware communication interface unit that acquires the received data when it is determined by the hardware communication device control unit that analysis processing is not possible with the predetermined protocol;
A protocol processing unit that can be implemented by software, performs protocol analysis processing on the received data acquired by the hardware communication interface unit, and passes the received data after protocol analysis processing to a socket;
A communication control apparatus comprising: It is determined whether or not the transmission data transmission request from the socket allocated for each network program is transmission using a predetermined protocol that can be protocol-processed by the hardware transmission device control unit, which is a hardware-connected circuit. A protocol decision step;
A hardware device delivery step of delivering the transmission data requested to be transmitted from the socket to the hardware transmission device control unit when it is determined that the transmission is performed using the predetermined protocol;
The hardware communication device control unit performs a protocol process for transmitting the transmission data with the predetermined protocol and a hardware communication device control step for transmitting the transmission data with the predetermined protocol;
A protocol delivery step of delivering the transmission data requested to be transmitted from the socket to a protocol processing unit when it is determined by the protocol determination step that the protocol other than the predetermined protocol;
A protocol processing step in which the protocol processing unit performs protocol processing according to a request from the socket for the transmission data;
A communication device control step of transmitting the transmission data subjected to the protocol processing;
A communication control method characterized by comprising: In the protocol processing step, after the protocol processing according to the request from the socket is performed on the transmission data in the protocol processing step, whether or not the transmission destination of the transmission data is the hardware transmission device control unit Determining that when the hardware transmission device control unit determines, the transmission data is transferred to the hardware transmission device control unit,
The communication control method according to claim 8. The hardware communication device control step transmits the transmission data from a plurality of hardware communication devices that perform transmission to an external network,
A hardware interface information holding step in which a plurality of hardware interface information holding units exist for each hardware communication device holds address information that is permitted to be transmitted on the external network by the hardware communication device; and
Hardware that identifies the hardware communication device that performs transmission based on the address information held by the hardware interface information holding unit when it is determined that transmission is performed using a predetermined protocol in the protocol determining step Specific steps,
The communication control method according to claim 8 or 9, further comprising: The communication device control step transmits the transmission data from a plurality of communication devices that perform transmission to an external network,
A plurality of interface information holding units that exist for each network device, an interface information holding step of holding address information that is permitted to be transmitted on the external network in the network device;
The address information that the interface information holding unit and the hardware interface information holding unit hold the hardware communication device or the communication device used for transmission of the transmission data after the protocol processing is performed in the protocol processing step. Specific steps to identify based on,
The communication control method according to claim 10, further comprising: An interface management storage step of storing in the interface management storage unit pointer information indicating the interface information storage unit and pointer information indicating the hardware interface information storage unit;
The specifying step is based on the address information held by the interface information holding unit and the hardware interface information holding unit indicated by the pointer information stored in the interface management storage unit;
The communication control method according to claim 11.   The communication control method according to any one of claims 8 to 12, wherein the predetermined protocol is any one or more of TCP, UDP, IP, and ICMP. A hardware communication device control unit, which is a hardware-connected circuit, performs control to receive received data from an external network, and determines whether the received data can be analyzed by a predetermined protocol. A hardware communication device control step of performing analysis processing according to the predetermined protocol when it is determined to be possible, and passing the received data after the protocol analysis processing to the socket;
A hardware communication interface step of acquiring the received data when it is determined in the hardware communication device control step that analysis processing is not possible with the predetermined protocol;
A protocol processing step for performing a protocol analysis process on the received data acquired by the hardware communication interface step, and passing the received data after the protocol analysis process to a socket;
A communication control method comprising: It is determined whether or not the transmission data transmission request from the socket allocated for each network program is transmission using a predetermined protocol that can be protocol-processed by the hardware transmission device control unit, which is a hardware-connected circuit. A protocol decision step;
A hardware device delivery step of delivering the transmission data requested to be transmitted from the socket to the hardware transmission device control unit when it is determined that the transmission is performed using the predetermined protocol;
The hardware communication device control unit performs a protocol process for transmitting the transmission data with the predetermined protocol and a hardware communication device control step for transmitting the transmission data with the predetermined protocol;
A protocol delivery step of delivering the transmission data requested to be transmitted from the socket to a protocol processing unit when it is determined by the protocol determination step that the protocol other than the predetermined protocol;
A protocol processing step in which the protocol processing unit performs protocol processing according to a request from the socket for the transmission data;
A communication device control step of transmitting the transmission data subjected to the protocol processing;
Communication control program for causing a computer to execute. A hardware communication device control unit, which is a hardware-connected circuit, performs control to receive received data from an external network, and determines whether the received data can be analyzed by a predetermined protocol. A hardware communication device control step of performing analysis processing according to the predetermined protocol when it is determined to be possible, and passing the received data after the protocol analysis processing to the socket;
A hardware communication interface step of acquiring the received data when it is determined in the hardware communication device control step that analysis processing is not possible with the predetermined protocol;
A protocol processing step for performing a protocol analysis process on the received data acquired by the hardware communication interface step, and passing the received data after the protocol analysis process to a socket;
Communication control program for causing a computer to execute.

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