CN103312618A - Flow management method based on combination of software and hardware - Google Patents
Flow management method based on combination of software and hardware Download PDFInfo
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Abstract
The invention discloses a flow management method based on combination of software and hardware. The method comprises the following steps of (1) establishing a software-hardware combined flow management system, wherein the software-hardware combined flow management system consists of three parts of a hardware flow management module, a software flow management module and a business module; the hardware flow management module is an FPGA (field programmable gate array) hardware flow management module, and the software flow management module is used as a mechanism for processing hardware flow management conflicts; (2) performing flow management on received messages by the hardware flow management module; and (3) performing flow management on the messages by the software flow management module. The method provided by the invention has the advantages that the hardware logic is simple, the integrity of the flow can be kept, the hardware and the software are combined, the flow management performance can be optimized and the like.
Description
Technical field
The present invention is mainly concerned with express network flow management field, refers in particular to a kind of flow management method based on software and hardware combining.
Background technology
Stream is the continuous message that passes through certain sampled point in the network in a period of time interval, comprises forward (initiator) and reverse (recipient) two semi-fluids.Article one, the message in the stream contains identical heading information, such as source, order IP address, source, order TCP/ udp port and IP protocol number.Flow management is mainly extracted message information based on ICP/IP protocol, and message information is followed the tracks of by analyzing, the connection status of recorded message stream, and the state information of all connections is unified maintenance and management.Continuous research along with to network security has emerged a lot of network security technologys, such as Scanning Techniques for Network Security, Network Firewall Technology, Intrusion Detection Technique, Protocol Analysis Technology etc.All these networks all are based on real-time, complicated management and control to message flow at line service, and its core is to realize efficient flow management.Along with the increase of message flow scale, the backbone network message flow tends to reach millions of even up to ten million scales, and the interpolation of stream table, deletion and search efficiency often descend rapidly in the extensive Workflow Management System, become the bottleneck that affects the entire system performance.
Flow management mechanism in the high speed network environment is faced with the challenge of business resiliency and two aspects of handling property.Actual application system has been ignored performance in order to satisfy professional complexity and requirement on flexibility usually.Therefore, this just needs a kind of method of new flow management, can optimize the flow management performance, and keep simultaneously good business resiliency.
Existing raising method mainly contains:
1. and search algorithm machine-processed by the dynamic management that improves stream list structure and stream table improves query hit rate, the minimizing query cost of stream table.
2. improve stream table query hit rate by improving hash (HASH) algorithm, reduce stream memory contention probability.
3. utilize the parallel mechanisms such as multinuclear, multithreading and multichannel memory to improve performance.
Summary of the invention
The technical problem to be solved in the present invention just is: for the technical problem that prior art exists, the invention provides the flow management method based on software and hardware combining that a kind of hardware logic is simple, integrality, hardware and software that can keep flowing combine, can optimize the flow management performance.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of flow management method based on software and hardware combining the steps include:
(1), makes up the software and hardware combining Workflow Management System; The software and hardware combining Workflow Management System is comprised of hardware flow administration module, software flow administration module and business module three parts; The hardware flow administration module is FPGA hardware flow administration module, and the software flow administration module is as a kind for the treatment of mechanism of hardware module flow management conflict;
(2), hardware flow administration module docking receiving literary composition carries out flow management;
(3), the software flow administration module carries out flow management to message.
As a further improvement on the present invention:
The detailed process of described step (2) is:
(2.1) according to the five-tuple information that receives message, in the inquiry hardware flow table whether the corresponding stream record of this message is arranged, upgrade the stream recorded information if exist, the flow management process finishes; If there is no turn (2.2);
(2.2) the if there is no corresponding stream recorded information of message illustrates that then this message is a message in the new stream, needs to determine the transport layer protocol type of this message, if the TCP message turns (2.3); If the UDP message turns (2.5);
(2.3) if the TCP message judges that further whether this message is first SYN bag, if it is turns (2.4); Otherwise message is sent to the software flow administration module;
(2.4) if first SYN wraps, if the storage flow record conflict occurs then message flow information is stored in the hardware flow table; Then will further judge if there is conflict, whether the conflict of having stored stream is overtime, if overtime then delete overtime stream, newly-built stream is stored in this position, if do not have overtime then message is sent to the software flow administration module;
(2.5) if UDP message, the further receiving port of definite this message; If the message that receives from the hardware message interface then directly sends to the software flow administration module; If the message that receives from the software and hardware message interface then a newly-built stream store, be not stored in the hardware flow table if conflict occurs then will flow record, whether overtime if there is the conflict stream that conflict needs further judgement to store, if overtime then delete overtime stream, newly-built stream is stored in this position, if do not have overtime then message is sent to the software flow administration module again.
The detailed process of described step (3) is:
(3.1) receive network interface message, judge type of message.If the message receipt message turns (3.2); If the message release message turns (3.3); If the stream time exceeded message turns (3.4);
(3.2) receive message, query software stream table if having the corresponding stream record of this message then upgrade the stream recorded information, is if there is no then further judged message transmissions layer protocol type; If the TCP message, further determine whether first SYN bag, if the stream recorded information filled in newly-built stream record then, then storage, if not, belong to invalid packet, then with packet loss; If the UDP message judges further whether hardware flow table correspondence position is empty, if be not empty, then newly-built stream record is stored in the software flow table, if empty, then message sent to the hardware flow administration module and processes;
(3.3) extract message memory address, releasing memory;
(3.4) extract overtime stream address, discharge the stream record space.
Comprise three data paths in the described software and hardware combining Workflow Management System, wherein 1. data path represents that the hardware flow administration module is successfully completed the message flow management, directly sends to business module with message; 2. data path represents that the message that is sended over by the hardware flow administration module is successfully completed flow management by the software flow administration module, sends to business module with message; 3. data path represents that the message that the hardware flow administration module sends to the software flow administration module do not managed by successful flow, then sends to again the hardware flow administration module, and the hardware flow administration module is finished flow management, and message is sent to business module; 3. data path is exclusively used in the UDP message, because UDP stream does not begin and end mark, a direct newly-built stream when the hardware flow administration module does not find this stream in the stream table, need further to determine whether the software flow administration module has stored this stream information, if the software flow administration module is not processed yet, so just notify the hardware flow administration module that this stream is stored.
Compared with prior art, the invention has the advantages that:
1, hardware logic of the present invention is simple.Only need to safeguard the hardware flow table during hardware module flow management of the present invention and carry out the five-tuple coupling, inquiry stream table process is simple, so it is fast to process message speed, meets the needs of express network Workflow Management System.
2, the present invention can keep the integrality that flows.In order to guarantee to provide complete message flow to business module, must carry out take stream as unit, one is flowed or all is dropped, or all is retained, and can only be by a flow management resume module, overcome the shortcoming that additive method does not keep the integrality that flows.
3, hardware and software combines among the present invention.In order to optimize the flow management performance, adopt the software and hardware combined technology.Utilize FPGA hardware fast throughput, the carry multichannel memory is realized the fast processing to the stream that do not conflict; Utilize multinuclear NPU multinuclear, multithreading characteristics, finish the processing to conflict stream.
Description of drawings
Fig. 1 is the frame principles schematic diagram of the present invention in concrete application example.
Fig. 2 is the present invention's schematic flow sheet that the hardware flow administration module is realized in instantiation.
Fig. 3 is the present invention's schematic flow sheet that the software flow administration module is realized in instantiation.
Embodiment
Below with reference to Figure of description and specific embodiment the present invention is described in further details.
As shown in Figure 1, the flow management method based on software and hardware combining of the present invention the steps include:
The first step makes up the software and hardware combining Workflow Management System.
The software and hardware combining Workflow Management System is comprised of hardware flow administration module, software flow administration module and business module three parts.As shown in Figure 1, the hardware flow administration module is FPGA hardware flow administration module, and it comes Extended RAM by several DDR3 memories of FPGA carry (in this example being four), increases stream table list item, improves the performance of flow management.The software flow administration module then is as a kind for the treatment of mechanism of hardware module flow management conflict, realizes by multinuclear NPU platform.System comprises three data paths, and wherein 1. data path represents that the hardware flow administration module is successfully completed the message flow management, directly sends to business module with message; 2. data path represents that the message that is sended over by the hardware flow administration module is successfully completed flow management by the software flow administration module, sends to business module with message; 3. data path represents that the message that the hardware flow administration module sends to the software flow administration module do not managed by successful flow, then sends to again the hardware flow administration module, and the hardware flow administration module is finished flow management, and message is sent to business module.3. data path is exclusively used in the UDP message, because UDP stream does not begin and end mark, a direct newly-built stream when the hardware flow administration module does not find this stream in the stream table, need further to determine whether the software flow administration module has stored this stream information, if the software flow administration module is not processed yet, so just notify the hardware flow administration module that this stream is stored.
The hardware flow administration module has two input ports (that is: input port 1 and input port 2) and an output port.Input port 1 is responsible for receiving the high-speed message stream in the backbone network, and input port 2 then is to receive effective message flow that the software flow administration module is not finished flow management; Output port is that the message that will finish flow management outputs to business module.
The software flow administration module has two output ports (that is: output port 1 and output port 2) and an input port.The output port 1 responsible effective message that will not finish flow management outputs to the hardware flow administration module, and the output port 2 responsible messages that will finish flow management output to business module; Input port then is to receive the message flow that the hardware flow administration module is not finished flow management.
For the ease of module of software and hardware communication, the present invention has defined the mutual message format of module of software and hardware, and mutual message is comprised of original message and custom zone two parts.The important information that comprises the mutual needs of software and hardware flow management module in the custom zone: message flow ID, cryptographic Hash, flow management sign, interface identifier and hardware flow table storaging mark.Software and hardware flow management module is distributed a stream ID sign for each bar stream, and stream ID is the unique identification of stream.Distributed according to stream ID allocation algorithm by concrete flow management module; The message cryptographic Hash be FPGA according to message five-tuple information, calculate by the CRC32 hash algorithm, as the hash index of software and hardware stream table; Flow management sign is that to distinguish message be that 0 represents hardware module by hardware module or the flow management of being undertaken by software module, and 1 represents software module; Interface identifier is used for distinguishing message and from which message interface receives, 0 finger hardware flow administration module message interface, the mutual message interface of 1 finger software and hardware; Hardware flow table storaging mark is whether the storage flow record is described under hardware flow table hash index corresponding to message, and 0 finger is storage not, the storage of the existing stream record of 1 finger.When hardware flow table and software flow table all do not inquire stream record corresponding to message, need to decide according to this sign is which module to finish flow management to message by, should be processed by hardware module when this is designated 0, be to finish flow management by software module at 1 o'clock.
Second step, hardware flow administration module docking receiving literary composition carries out flow management (referring to shown in Figure 2).
2.1 according to the five-tuple information that receives message, in the inquiry hardware flow table whether the corresponding stream record of this message is arranged, upgrade the stream recorded information if exist, the flow management process finishes; If there is no turn 2.2.
2.2 if there is no the corresponding stream recorded information of message illustrates that then this message is a message in the new stream, needs to determine the transport layer protocol type of this message, if the TCP message turns 2.3; If the UDP message turns 2.5.
2.3 if the TCP message judges that further whether this message is first SYN bag, if it is turns 2.4; Otherwise message is sent to the software flow administration module.
2.4 if first SYN bag, appearance conflicts then message flow information is stored in the hardware flow table if storage flow records; Then will further judge if there is conflict, whether the conflict of having stored stream is overtime, if overtime then delete overtime stream, newly-built stream is stored in this position, if do not have overtime then message is sent to the software flow administration module.That is, extract the hardware store flag in the message custom zone, if 0 newly-built TCP stream, add in the stream table, if 1, judge further whether the stream of storage is overtime, if overtimely then delete overtime stream, then a newly-built stream is stored in this position, if not then meet at the software flow administration module; If not directly meeting at the software flow administration module, processes by first SYN bag.
2.5 if UDP message, the further receiving port of definite this message.If the message that receives from the hardware message interface then directly sends to the software flow administration module; If the message that receives from the software and hardware message interface then a newly-built stream store, be not stored in the hardware flow table if conflict occurs then will flow record, whether overtime if there is the conflict stream that conflict needs further judgement to store, if overtime then delete overtime stream, newly-built stream is stored in this position, if do not have overtime then message is sent to the software flow administration module again.
If i.e.: UDP message, the first step need to be determined message and from which interface receive.If from interface 0(high-speed message interface) message that receives press UDP message processing mode 1 and processes, if from interface 1(software and hardware message interface) message that receives presses 2 processing of UDP message processing mode.
UDP message processing mode 1: extract the hardware store flag in the message custom zone, if flag is 0, directly message is met at the software flow administration module and process; If flag is 1, further judge whether the stream of storage is overtime, if overtimely then delete overtime stream, be 0 with the hardware store home position then, meet at the software flow administration module and process, overtimely then message is not directly met at the software flow administration module if having.
UDP message processing mode 2: extract the hardware store flag in the message custom zone, if flag is 0, newly-built UDP stream record adds in the hardware flow table; If flag is 1, further judge whether the stream of storage is overtime, if overtimely then delete overtime stream, newly-built UDP stream record adds in the hardware flow table, overtimely then message is not directly met at the software flow administration module if having.
In the 3rd step, the software flow administration module carries out flow management (referring to shown in Figure 3) to message.
The software flow administration module is as development platform take multinuclear NPU.Because the Multi-core characteristic, the present invention is divided into two kinds to thread, and a kind of storage and renewal of carrying out stream information is defined as the flow management thread; A kind of overtime detection of carrying out stream information is defined as overtime detection thread, distributes a thread.
The type of message that multinuclear NPU processes has three kinds: message receipt message, message release message and stream time exceeded message.Different according to type of message, action is also different.The message receipt message refers to that network interface has message to arrive and needs to receive; The message release message refers to that multinuclear NPU sends the message success, discharges the memory address that has sent message; The stream time exceeded message is the self-defining type of message of the present invention, has referred to overtime stream storage, deletes overtime stream according to overtime stream address.
3.1 receive network interface message, judge type of message.If the message receipt message turns 3.2; If the message release message turns 3.3; If the stream time exceeded message turns 3.4.
3.2 the reception message, query software stream table if having the corresponding stream record of this message then upgrade the stream recorded information, is if there is no then further judged message transmissions layer protocol type.If the TCP message, further determine whether first SYN bag, if the stream recorded information filled in newly-built stream record then, then storage, if not, belong to invalid packet, then with packet loss; If the UDP message judges further whether hardware flow table correspondence position is empty, if be not empty, then newly-built stream record is stored in the software flow table, if empty, then message sent to the hardware flow administration module and processes.
3.3 extract the message memory address, releasing memory.
3.4 extract overtime stream address, discharge the stream record space.
In this example shown in Figure 3, at first extract message hash value, inquire about in the chained list under software flow table hash index, if existence stream records then upgrades stream information; If do not exist, judge type of message.If the UDP message extracts hardware flow table storaging mark position, if 0, then message is sent to the hardware flow administration module and process, if the stream recorded information filled in 1 newly-built stream record, be stored in the chained list under the hash index.If the TCP message, further.Determine whether first SYN bag, if the stream recorded information filled in newly-built stream record then, then storage, if not, belong to invalid packet, then with packet loss.
Below only be preferred implementation of the present invention, protection scope of the present invention also not only is confined to above-described embodiment, and all technical schemes that belongs under the thinking of the present invention all belong to protection scope of the present invention.Should be pointed out that for those skilled in the art, the some improvements and modifications not breaking away under the principle of the invention prerequisite should be considered as protection scope of the present invention.
Claims (4)
1. the flow management method based on software and hardware combining is characterized in that, step is:
(1), makes up the software and hardware combining Workflow Management System; The software and hardware combining Workflow Management System is comprised of hardware flow administration module, software flow administration module and business module three parts; The hardware flow administration module is FPGA hardware flow administration module, and the software flow administration module is as a kind for the treatment of mechanism of hardware module flow management conflict;
(2), hardware flow administration module docking receiving literary composition carries out flow management;
(3), the software flow administration module carries out flow management to message.
2. the flow management method based on software and hardware combining according to claim 1 is characterized in that, the detailed process of described step (2) is:
(2.1) according to the five-tuple information that receives message, in the inquiry hardware flow table whether the corresponding stream record of this message is arranged, upgrade the stream recorded information if exist, the flow management process finishes; If there is no turn (2.2);
(2.2) the if there is no corresponding stream recorded information of message illustrates that then this message is a message in the new stream, needs to determine the transport layer protocol type of this message, if the TCP message turns (2.3); If the UDP message turns (2.5);
(2.3) if the TCP message judges that further whether this message is first SYN bag, if it is turns (2.4); Otherwise message is sent to the software flow administration module;
(2.4) if first SYN wraps, if the storage flow record conflict occurs then message flow information is stored in the hardware flow table; Then will further judge if there is conflict, whether the conflict of having stored stream is overtime, if overtime then delete overtime stream, newly-built stream is stored in this position, if do not have overtime then message is sent to the software flow administration module;
(2.5) if UDP message, the further receiving port of definite this message; If the message that receives from the hardware message interface then directly sends to the software flow administration module; If the message that receives from the software and hardware message interface then a newly-built stream store, be not stored in the hardware flow table if conflict occurs then will flow record, whether overtime if there is the conflict stream that conflict needs further judgement to store, if overtime then delete overtime stream, newly-built stream is stored in this position, if do not have overtime then message is sent to the software flow administration module again.
3. the flow management method based on software and hardware combining according to claim 1 is characterized in that, the detailed process of described step (3) is:
(3.1) receive network interface message, judge type of message, if the message receipt message turns (3.2); If the message release message turns (3.3); If the stream time exceeded message turns (3.4);
(3.2) receive message, query software stream table if having the corresponding stream record of this message then upgrade the stream recorded information, is if there is no then further judged message transmissions layer protocol type; If the TCP message, further determine whether first SYN bag, if the stream recorded information filled in newly-built stream record then, then storage, if not, belong to invalid packet, then with packet loss; If the UDP message judges further whether hardware flow table correspondence position is empty, if be not empty, then newly-built stream record is stored in the software flow table, if empty, then message sent to the hardware flow administration module and processes;
(3.3) extract message memory address, releasing memory;
(3.4) extract overtime stream address, discharge the stream record space.
4. according to claim 1 and 2 or 3 described flow management methods based on software and hardware combining, it is characterized in that, comprise three data paths in the described software and hardware combining Workflow Management System, wherein 1. data path represents that the hardware flow administration module is successfully completed the message flow management, directly sends to business module with message; 2. data path represents that the message that is sended over by the hardware flow administration module is successfully completed flow management by the software flow administration module, sends to business module with message; 3. data path represents that the message that the hardware flow administration module sends to the software flow administration module do not managed by successful flow, then sends to again the hardware flow administration module, and the hardware flow administration module is finished flow management, and message is sent to business module; 3. data path is exclusively used in the UDP message, because UDP stream does not begin and end mark, a direct newly-built stream when the hardware flow administration module does not find this stream in the stream table, need further to determine whether the software flow administration module has stored this stream information, if the software flow administration module is not processed yet, so just notify the hardware flow administration module that this stream is stored.
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