CN102833175B - Based on real-time relay transmission engine and the method for OS - Google Patents

Abstract

The invention relates to a real-time relay transmission engine and method based on a heterogeneous operating system. The real-time relay transmission engine based on the heterogeneous operating system includes: a real-time relay transmission engine for application layer data on a real-time operating system, and a real-time relay transmission engine manager for application layer data on a non-real-time operating system; the application The layer data real-time relay transmission engine includes a real-time relay transmission table; the real-time relay transmission table is updated according to the information needed for the application layer data relay transmission obtained by means of the real-time relay transmission table management module, and the The application layer data real-time relay transmission engine performs relay transmission on the application layer data according to the data real-time relay transmission table. The real-time relay transmission engine based on the heterogeneous operating system provided by the present invention realizes the transfer of the information required for the application layer data relay transmission between the real-time operating system and the non-real-time operating system, and its structure is simple, which greatly reduces the application The complexity of layer data relay transmission.

Description

Real-time relay transmission engine and method based on heterogeneous operating system

technical field

The invention relates to a real-time relay transmission engine and method based on a heterogeneous operating system.

Background technique

Real-time operating system (RTOS) means that when external events or data are generated, they can accept and process them at a fast enough speed, and the results of the processing can control the production process or make quick decisions on the processing system within the specified time. Responsive, and control of the operating system in which all real-time tasks run in unison.

In the field of routers and switches, real-time operating systems have been widely used, because they have much higher performance advantages than non-real-time operating systems in terms of fast processing and forwarding of data packets. However, the real-time operating system cannot achieve the complex protocol stack of the non-real-time operating system, and even if it does, the performance is lower than that of the non-real-time operating system. Therefore, it is necessary to use the complex protocol stack of the non-real-time operating system and the fast data packet processing capability of the real-time operating system to meet the requirements of high-performance routers and switches.

Based on the complementary advantages of the above non-real-time operating system and real-time operating system, it is necessary to run two operating systems on one computer. The communication between these two operating systems has become a research hotspot. A general network processor is composed of multiple cores. Usually, a non-real-time operating system runs on some cores, and a real-time operating system runs on other cores. The two operating systems can communicate by means of inter-core communication. Generally, the non-real-time operating system runs on the control layer, the real-time operating system runs on the data layer, and the non-real-time operating system sends and receives data through the real-time operating system. For high-performance packet forwarding, it must be offloaded to a real-time operating system in order to obtain higher forwarding performance. However, the real-time operating system cannot access the routing table on the non-real-time operating system and other necessary information for forwarding data packets, so a mechanism is needed to transfer these information between the two operating systems.

Contents of the invention

The purpose of the present invention is to realize the transmission of application layer data information that needs to be relayed between the real-time operating system and the non-real-time operating system, so that the real-time operating system has higher relay transmission performance.

To achieve the above object, the present invention provides a real-time relay transmission engine based on a heterogeneous operating system. The real-time relay transmission engine based on the heterogeneous operating system includes: a real-time relay transmission engine for application layer data on the real-time operating system, and a real-time relay transmission engine manager for application layer data on the non-real-time operating system; the application The layer data real-time relay transmission engine includes a data real-time relay transmission table; the data real-time relay transmission table is based on the information needed for the application layer data relay transmission acquired by the application layer data real-time relay transmission engine manager For updating, the real-time relay transmission engine of the application layer data relays the application layer data according to the real-time relay transmission table.

Further, the information required for relay transmission of the application layer data includes: destination MAC address, destination IP address, destination UDP port information, source MAC address, source IP address, and source UDP port information of the application layer data.

Further, the application layer data real-time relay transmission engine manager includes: a real-time relay transmission engine configuration table; the application layer data real-time relay transmission engine manager is based on the application layer data from the real-time relay transmission The engine configuration table acquires the destination IP address, source UDP port information, and destination UDP port information, and updates to the real-time relay transmission table.

Further, the application layer data real-time relay transmission engine manager also includes: a real-time relay transmission engine configuration module; the application layer data real-time relay transmission engine also includes: a data real-time relay transmission table management module; The real-time relay transmission engine configuration module is used to send the acquired described destination IP address, source UDP port information, and destination UDP port information to the real-time relay transmission table management module, and the real-time data relay transmission table management module according to The acquired destination IP address, source UDP port information, and destination UDP port information update the real-time relay transmission table.

Further, the real-time relay transmission engine configuration module is also used to configure the real-time relay transmission engine configuration table.

Further, the real-time relay transmission engine manager of the application layer data also includes: a non-real-time relay transmission data processing module, used to view the information of the application layer data, and transmit from the real-time relay transmission according to the information viewed. Obtain the destination IP address, source UDP port information, and destination UDP port information from the engine configuration table.

Further, the real-time relay transmission engine based on the heterogeneous operating system also includes: a virtual network card driver and a TCP/IP protocol stack; the real-time relay transmission engine for application layer data also includes: a data input module; the TCP/IP The IP protocol stack establishes the Ethernet frame corresponding to the application layer data according to the obtained destination IP address, source UDP port information, and destination UDP port information, and sends it to the data input module through the virtual network card driver, and the data input module starts from Extract the source IP address, source MAC address, and destination MAC address from the Ethernet frame, and update them in the real-time relay transmission table; the data input module is also used to receive network packets on the network, from the Extract the application layer data from the network data packet.

Further, the real-time relay transmission engine of the application layer data also includes: a data processing module, configured to process the application layer data according to the information required for the relay transmission of the application layer data in the real-time data relay transmission table Ethernet frame encapsulation; a data output module, configured to receive the encapsulated application layer data sent from the data processing module, and send the application layer data through the control network card interface.

The invention also provides a real-time relay transmission method based on a heterogeneous operating system. Wherein, the heterogeneous operating system includes: a non-real-time operating system and a real-time operating system, and the method includes the following steps: the real-time operating system obtains the information required for relay transmission of application layer data by means of the non-real-time operating system; the real-time operating system The system relays and transmits the application layer data according to the acquired information required for the relay transmission of the application layer data.

The real-time relay transmission engine based on the heterogeneous operating system provided by the present invention realizes the transfer of the information required for the relay transmission of application layer data between the real-time operating system and the non-real-time operating system, and its structure is simple, which greatly reduces the application The complexity of layer data relay transmission. The heterogeneous operating system-based real-time relay transmission engine has a higher processing capability for application layer data and can meet the requirements of high-performance routers and switches.

Description of drawings

Fig. 1 is the structural representation of the real-time relay transmission engine based on heterogeneous operating system of the present invention;

Fig. 2 is the flow chart of processing application layer data by the real-time relay transmission engine based on heterogeneous operating system of the present invention;

Fig. 3 is the flowchart of the real-time relay transmission method based on the heterogeneous operating system of the present invention;

FIG. 4 is a flowchart of another real-time relay transmission method based on a heterogeneous operating system according to the present invention.

detailed description

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

As shown in FIG. 1 , it is a schematic structural diagram of a real-time relay transmission engine based on a heterogeneous operating system in the present invention.

The real-time relay transmission engine based on the heterogeneous operating system includes an application layer data real-time relay transmission engine 110 on the real-time relay transmission system, an application layer data real-time relay transmission engine manager 120 on the non-real-time operating system, The application layer data real-time relay transmission engine 110 includes: a data real-time relay transmission table 112 .

The application layer data real-time relay transmission engine 110 performs the application layer data real-time relay transmission processing according to the information required for application layer data relay transmission obtained by the application layer data real-time relay transmission engine manager 120 .

It should be noted that the information required for relay transmission of application layer data includes: source UDP port information, destination UDP port information, source IP address, destination IP address, source MAC address, and destination MAC address of application layer data.

The following specifically introduces the structure of the real-time relay transmission engine based on the heterogeneous operating system in this embodiment:

First of all, it needs to be explained that in this embodiment, the real-time relay transmission engine based on heterogeneous operating systems is implemented on the OCTEON series processors of Cavium Corporation, wherein the non-real-time operating system uses the Linux operating system, and the real-time operating system uses Cavium The simple execution environment (SimpleExcutive) provided by the company. Therefore, the application layer data real-time relay transmission engine manager 120 runs on the Linux operating system, and the application layer data real-time relay transmission engine 110 runs on the simple execution environment. The real-time relay transmission engine based on the heterogeneous operating system also includes a virtual network card driver 130 and a TCP/IP protocol stack 140, and utilizes the TCP/IP protocol stack and the virtual network card driver provided in the Cavium company software development kit as the heterogeneous network card driver. The virtual network card driver 130 and the TCP/IP protocol stack 140 of the real-time relay transmission engine of the operating system.

The application layer data real-time relay transmission engine manager 120 includes: a non-real-time relay transmission data processing module 121 , a real-time relay transmission engine configuration table 122 and a real-time relay transmission engine configuration module 123 .

The real-time relay transmission engine configuration module 123 configures the real-time relay transmission engine configuration table 122 according to user requirements. The real-time relay transmission engine configuration table 122 includes receiving side information, relay transmission side information and entry state information. Information on the receiving side includes: source MAC address, source IP address, and source UDP port information of application layer data; information on the relay transmission side includes: destination IP address, destination UDP port information, and source UDP port information of application layer data; entry status Information, used to indicate whether the information on the receiving side and the information on the relaying transmission side are complete and whether they need to be updated.

Therefore, the non-real-time relay transmission data processing module 121 obtains the source UDP port information, the destination UDP port information, and the destination IP address of the application layer data from the real-time relay transmission engine configuration table 122 by checking the information of the application layer data, and These information are sent to the virtual network card driver 130 and the TCP/IP protocol stack 140 .

At the same time, the real-time relay transmission engine configuration module 123 sends the source UDP port information, destination UDP port information, and destination IP address of the application layer data obtained by the non-real-time relay transmission data processing module 121 to the application layer data real-time relay transmission engine 110.

The TCP/IP protocol stack 140 uses the source UDP port information, destination UDP port information, and destination IP address of the received application layer data to establish a Socket (network socket), and then constructs a socket corresponding to the application through the TCP/IP protocol stack 140. The complete Ethernet frame of the layer data is sent to the application layer data real-time relay transmission engine 110 through the virtual network card driver 130 . The Ethernet frame includes the source IP address, source MAC address, and destination MAC address of the application layer data.

The application layer data real-time relay transmission engine 110 includes: a data input module 111 , a real-time relay transmission table 112 , and a real-time relay transmission table management module 113 .

The data input module 111 is used for receiving the application layer data processed by the application layer data real-time relay transmission engine manager 120 and the TCP/IP protocol stack 140 .

The real-time relay transmission table 112 is updated according to the source UDP port information, destination UDP port information, and destination IP address of the application layer data sent by the real-time relay transmission engine configuration module 123 received by the data real-time relay transmission table management module 113. And, update according to the source IP address, source MAC address, and destination MAC address of the application layer data extracted from the Ethernet frame corresponding to the application layer data received from the data input module 111 .

It should be noted that the real-time relay transmission table 112 includes: receiving side information, relay transmission side information, and entry state information. Among them, the information on the receiving side includes: the source MAC address, source IP address, and source UDP port information of the application layer data; the information on the relay transmission side includes: the destination MAC address, destination IP address, and destination UDP port information of the application layer data, Source MAC address, source IP address, source UDP port information; entry status information, used to indicate whether the information on the receiving side and the information on the relay transmission side are complete, and whether they need to be updated.

It should be noted that the data input module 111 is also configured to receive network data packets on the network, and extract application layer data from the received network data packets.

The application layer data real-time relay transmission engine 110 also includes a data processing module 114 and a data output module 115 .

The data processing module 114 is used to receive the application layer data in the data input module 111, and perform Ethernet frame encapsulation on the application layer data according to the complete information required for the application layer data relay transmission in the data real-time relay transmission table 112.

The data output module 115 is used to receive the packaged application layer data sent from the data processing module 114 that needs to be relayed, and send the application layer data in the form of network data packets through the control network card interface.

The process of processing application layer data by the real-time relay transmission engine based on the heterogeneous operating system is introduced below. As shown in FIG. 2 , it is a flow chart of processing application layer data by the heterogeneous operating system-based real-time relay transmission engine of the present invention.

In step 201, the data input module 111 receives network data packets from the network, and extracts application layer data from the received network data packets. Then extract the information of the application layer data header.

Step 202, compare the extracted information of the application layer data header with the information in the real-time relay transmission table 112, and judge whether the real-time relay transmission table 112 has complete relay transmission entry information.

If there is complete relay transmission entry information in the real-time relay transmission table 112, step 209 is directly performed, which will not be described in detail here, but will be described later. If the real-time relay transmission table 112 does not have complete relay transmission entry information, step 203 is performed.

Step 203 , the data input module 111 sends the application layer data to the virtual network card driver 130 and the TCP/IP protocol stack 140 for processing.

Step 204 , the virtual network card driver 130 judges whether the application layer data is data to be relayed according to the information in the real-time relay transmission table 112 .

Specifically, after the data input module 111 sends the application layer data to the virtual network card driver 130 and the TCP/IP protocol stack 140, the virtual network card driver 130 relays and transmits the table 112 in real time according to the information of the application layer data header and the data in step 202. According to the comparison result of the information in the application layer, it is judged whether the application layer data packet is data to be relayed and transmitted.

If the application layer data is not data to be relayed, step 212 is executed.

Step 212 , the application layer data is sent back to the data input module 111 through the virtual network card driver 130 and the TCP/IP protocol stack 140 .

Step 213 , the data input module 111 sends the application layer data to the data output module 115 through the data processing module 114 and sends it in the form of the original network data packet when receiving it.

At this time, the data processing module 114 does not perform any processing on the application layer data, but only performs the transfer function.

If the application layer data is data to be relayed, step 205 is executed.

Step 205 , the TCP/IP protocol stack 140 sends the application layer data to the non-real-time relay transmission data processing module 121 .

Step 206, the non-real-time relay transmission data processing module 121 obtains the destination IP address, the source UDP port, and the destination UDP port of the application layer data, and passes these real-time relay transmission engine configuration modules 123 and real-time relay transmission table management module 113 The information is updated in the real-time relay transmission table 112 .

Specifically, the real-time relay transmission engine configuration module 123 configures the real-time relay transmission engine configuration table 122 in advance according to user requirements. The non-real-time relay transmission data processing module 121 checks the information of the application layer data, and obtains the destination IP address and source UDP of the application layer data from the pre-configured real-time relay transmission engine configuration table 122 according to the information of the application layer data viewed. Port information, destination UDP port information. Simultaneously, the real-time relay transmission engine configuration module 123 sends these information obtained by the non-real-time relay transmission data processing module 121 to the data real-time relay transmission table management module 113, and the data real-time relay transmission table management module 113 updates the data according to these information Real-time relay transmission table 112.

Step 207, use the destination IP address, source UDP port information, and destination UDP port information of the application layer data obtained in step 206 to establish a network socket, and then use the TCP/IP protocol stack 140 to construct a complete The Ethernet frame is then sent to the data input module 111 through the virtual network card driver 130 .

Specifically, the real-time relay transmission engine configuration module 123 sends the application layer data and the obtained destination IP address, source UDP port information, and destination UDP port information to the virtual network card driver 130 and the TCP/IP protocol stack 140. The TCP/IP protocol stack 140 constructs a complete Ethernet frame corresponding to the application layer data according to the network socket established by the IP address of the application layer data, the source UDP port information, and the destination UDP port information. The Ethernet frame includes the source IP address, source MAC address, and destination MAC address of the application layer data. Then, the virtual network card driver 130 sends the constructed Ethernet frame to the data input module 111 .

Step 208 , the data input module 111 extracts the source IP address, source MAC address and destination MAC address of the application layer data from the received Ethernet frame, and updates them into the real-time data relay transmission table 112 .

At this time, the relay transmission entry information in the real-time relay transmission table 112 has been completely updated. Step 209 is executed below.

Step 209 , the data input module 111 sends the application layer data to the data processing module 114 .

Step 210, the data processing module 114 extracts from the data real-time relay transmission table 112 the complete information required for network data relay transmission (i.e. source UDP port information, destination UDP port information, source IP address, destination IP address, source MAC address, destination MAC address.), and then perform Ethernet frame encapsulation, and send the encapsulated application layer data to the data output module 115.

In step 211, the data output module 115 sends the encapsulated application layer data in the form of a new network data packet by controlling the interface of the network card.

It can be seen from the above embodiments that the heterogeneous operating system-based real-time relay transmission engine provided by the present invention realizes the transfer of information required for application layer data relay transmission between the real-time operating system and the non-real-time operating system, and Its structure is simple, which greatly reduces the complexity of data relay transmission at the application layer.

As shown in FIG. 3 , it is a flow chart of the real-time relay transmission method based on the heterogeneous operating system of the present invention.

First of all, it needs to be explained that the heterogeneous operating systems include non-real-time operating systems and real-time operating systems.

In step 310, the real-time operating system obtains the information required for relaying and transmitting the application layer data by means of the non-real-time operating system.

It should be noted that the information required for relay transmission of application layer data includes: destination MAC address, destination IP address, destination UDP port information, source MAC address, source IP address, and source UDP port information of application layer data.

Step 320 , the real-time operating system relays and transmits the application layer data according to the information required for the relay transmission of the application layer data obtained in step 310 .

In another embodiment, as shown in FIG. 4 , it is a flowchart of another real-time relay transmission method based on a heterogeneous operating system according to the present invention.

It should be noted that the non-real-time operating system in this embodiment has a real-time relay transmission engine configuration table.

Step 311, obtain the destination IP address, source UDP port information, and destination UDP port information from the real-time relay transmission engine configuration table as information required for application layer data relay transmission.

Step 312, non-real-time operating system utilizes the purpose IP address that obtains, source UDP port information, purpose UDP port information to construct Ethernet frame, and real-time operating system extracts source IP address, source MAC address, purpose MAC address from Ethernet frame, as Information required for relay transmission of application layer data.

Step 320 , the real-time operating system relays and transmits the application layer data according to the information required for the relay transmission of the application layer data obtained in steps 311 and 312 .

It can be seen from the above embodiments that the heterogeneous operating system-based real-time relay transmission method provided by the present invention realizes the transfer of information required for application layer data relay transmission between real-time operating systems and non-real-time operating systems.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (9)

1. A real-time relay transmission engine based on a heterogeneous operating system, characterized in that, comprising: an application layer data real-time relay transmission engine on a real-time operating system, and an application layer data real-time relay on a non-real-time operating system Transmission engine manager; The real-time relay transmission engine of the application layer data includes a real-time relay transmission table; The data real-time relay transmission table is updated according to the information required for the application layer data relay transmission obtained by the application layer data real-time relay transmission engine manager, and the application layer data real-time relay transmission engine is based on the data The real-time relay transmission table performs relay transmission on the application layer data; The information required for the relay transmission of the application layer data includes: the destination MAC address of the application layer data, the destination IP address, the destination UDP port information, the source MAC address, the source IP address, and the source UDP port information; The real-time relay transmission engine manager of the application layer data includes: a real-time relay transmission engine configuration table; The real-time relay transmission engine manager of the application layer data obtains the destination IP address, source UDP port information, and destination UDP port information from the real-time relay transmission engine configuration table based on the application layer data, and updates to the Real-time relay transmission table. 2. the real-time relay transmission engine based on heterogeneous operating system according to claim 1, is characterized in that, described application layer data real-time relay transmission engine manager also comprises: real-time relay transmission engine configuration module; The application layer data real-time relay transmission engine also includes: a real-time relay transmission table management module; The real-time relay transmission engine configuration module is used to send the obtained destination IP address, source UDP port information, and destination UDP port information to the real-time relay transmission table management module, and the data real-time relay transmission table management module The module updates the real-time relay transmission table according to the acquired destination IP address, source UDP port information, and destination UDP port information. 3. The real-time relay transmission engine based on a heterogeneous operating system according to claim 1, wherein the real-time relay transmission engine configuration module is further configured to configure the real-time relay transmission engine configuration table. 4. the real-time relay transmission engine based on heterogeneous operating system according to claim 1, is characterized in that, described application layer data real-time relay transmission engine manager also comprises: non-real-time relay transmission data processing module, uses To view the information of the application layer data, obtain the destination IP address, source UDP port information, and destination UDP port information from the real-time relay transmission engine configuration table according to the viewed information. 5. the real-time relay transmission engine based on heterogeneous operating system according to claim 1, characterized in that, the real-time relay transmission engine based on heterogeneous operating system also comprises: virtual network card driver and TCP/IP protocol stack ; The real-time relay transmission engine of the application layer data also includes: a data input module; The TCP/IP protocol stack establishes an Ethernet frame corresponding to the application layer data according to the acquired destination IP address, source UDP port information, and destination UDP port information, and sends it to the data input module through a virtual network card driver. The data input module extracts the source IP address, source MAC address, and destination MAC address from the Ethernet frame, and updates them into the real-time data relay transmission table. 6. the real-time relay transmission engine based on heterogeneous operating system according to claim 5, is characterized in that, described data input module is also used for receiving the network packet on the network, extracts described from the network packet Application layer data. 7. The real-time relay transmission engine based on heterogeneous operating systems according to claim 1, wherein the real-time relay transmission engine of the application layer data further comprises: A data processing module, configured to perform Ethernet frame encapsulation on the application layer data according to the information required for the application layer data relay transmission in the data real-time relay transmission table; The data output module is configured to receive the encapsulated application layer data sent from the data processing module, and send the application layer data in the form of network data packets. 8. A real-time relay transmission method based on a heterogeneous operating system, the heterogeneous operating system comprising: a non-real-time operating system and a real-time operating system, characterized in that, comprising the following steps: The real-time operating system obtains the information required for relay transmission of application layer data by means of a non-real-time operating system; The real-time operating system relays and transmits the application layer data according to the acquired information required for the relay transmission of the application layer data; The non-real-time operating system has a real-time relay transmission engine configuration table; the steps for the real-time operating system to obtain information required for application layer data relay transmission by means of the non-real-time operating system include: The destination IP address, source UDP port information, and destination UDP port information are obtained from the real-time relay transmission engine configuration table as information required for application layer data relay transmission. 9. The method according to claim 8, characterized in that, the step of the real-time operating system obtaining information required for application layer data relay transmission by means of a non-real-time operating system comprises: The non-real-time operating system utilizes the obtained destination IP address, the source UDP port information, and the destination UDP port information to construct an Ethernet frame; The real-time operating system extracts the source IP address, the source MAC address, and the destination MAC address from the Ethernet frame as information required for application layer data relay transmission.