CN107147655A - A kind of network dual stack parallel process model and its processing method - Google Patents
A kind of network dual stack parallel process model and its processing method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
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Abstract
The invention provides a kind of network dual stack parallel process model and its processing method, TCP/UDP protocol layers are used to recognize IPv4 packets and IPv6 packets, network interface protocols layer is sent to upper strata to the encapsulation of data link layer packets and by the data received, IPv4, IPv6 protocol layer realize that dual stack parallel processing works, and ICMPv4, ICMPv6 protocol layer ask the response of report to the PING received and actively sends PING request reports.The implementation process stratification of TCP/IP dual stacks is improved the transplantability of protocol stack by the present invention, and the protocol stack, which is transplanted on other hardware, need to only change the file of a small amount of and bottom hardware contact, and the program on upper strata is without modification；TCP/IP dual stacks can be widely applied in the realization of embedded system in industrial production and common life, equipment can be made to increase network interface easily, popularization and application and the modern life in particular with IPv6 are developed rapidly, and realization set forth in the present invention just has more great meaning.
Description
Technical field
The present invention relates in network technique field, and in particular to a kind of network dual stack parallel process model and its processing
Method.
Background technology
With the popularization and the raising of information sharing degree of the Internet, applications, embedded device is connected with Internet,
Namely Embedded Ethernet Technology has become a kind of trend.Embedded Ethernet Technology is primarily referred to as how connecing embedded system
Enter Internet, but at present, the definite unified definition of embedded system also neither one.In a broad sense, it is any to include
The dedicated system of central processor can be referred to as embedded system.Another more generic definition of embedded system is：To answer
Centered on, based on computer technology, software and hardware can cut, be adapted to application system to function, reliability, cost, body
The dedicated computer system that product, power consumption are strict with.Embedded Ethernet Technology refers in order that Implementation of Embedded System access is mutual
Network savvy, ICP/IP protocol according to actual demand after simplification, as a kind of Embedded Application so that, this technology
A kind of use flush bonding module can also be simply interpreted as rather than PC systems are directly accessed the technology of internet.
It is the matter of utmost importance of the embedded internet function to realize procotol.Embedded device is limited by hardware resource
System, typically only supports simple communication protocol（Such as RS-232/485）, these simple communication protocols are not enough to make these embedding
Enter formula equipment and be connected into internet, therefore to allow embedded device to be connected into internet, must just allow it to support ICP/IP protocol stack, most
Realize that remote control, remote data acquisition etc. are applied by internet eventually.And with the development of internet, IPv6 agreements go out
Existing, Embedded Ethernet Technology supports IPv6 agreements to have become the emphasis of research.
The formula system hardware resources of being usually embedded can not accommodate the complicated protocol stack of architecture, and standard based on
IPv4, IPv6 ICP/IP protocol stack are all the realizations in face of PC or server, with complicated function, and these functions pair
In simple, the Embedded Application for realizing certain specific function is unnecessary, and brings higher to limited system resource
Burden.Thus, when designing and Implementing the TCP/IP dual stacks for supporting two kinds of agreements of IPv4 and IPv6, it is necessary in accordance with Protocol Standard
Quasi- file, i.e. IETF（Intemet Engineering task Force Internet Engineering Task groups）RFC（Request
for Comments）Document, cuts embedded system in terms of following two：
1. feature is cut：Crop to TCP/IP dual stack functions implementation relation less, and do not influence the final work(of system
The protocol realization of energy；
2. performance is cut：Due to embedded system be typically all for some specific system and realize, therefore according to should
Some complicated situations can be carried out simplifying processing with purpose requirement.
The content of the invention
Goal of the invention：It is an object of the invention to for problem of the prior art there is provided a kind of network dual stack simultaneously
Row processing model and its processing method.
Technical scheme：The invention provides a kind of network dual stack parallel process model, including TCP/UDP protocol layers,
Network interface protocols layer, IPv4, IPv6 protocol layer, ICMPv4/ICMPv6 protocol layers；The TCP/UDP protocol layers are used to recognize
IPv4 packets and IPv6 packets, network interface protocols layer is to the encapsulation of data link layer packets and will receive
Data be sent to upper strata, IPv4, IPv6 protocol layer realizes dual stack parallel processing work, the ICMPv4,
ICMPv6 protocol layers ask the response of report to the PING received and actively send PING request reports.
A kind of processing method of network dual stack parallel process model, will intercept and capture the information got off in physical layer first and carries
Data link layer is given, the frame received is analyzed in MAC layer, respective field that now just can be in frame, which is distinguished, is
IPv4 bags or IPv6 bags, encapsulation process continue up layer after terminating and submitted, and are according to collecting bag from bottom in Internet
IPv4 bags or IPv6 bags realize that dual stack, processing continue up layer and submitted after terminating doing corresponding processing and are transmitted layer
Respective handling, until upper-layer user application.
Beneficial effect：The implementation process stratification of TCP/IP dual stacks is improved the transplantability of protocol stack by the present invention,
The protocol stack, which is transplanted on other hardware, need to only change the file of a small amount of and bottom hardware contact, and the program on upper strata need not be repaiied
Change；TCP/IP dual stacks can be widely applied in the realization of embedded system in industrial production and common life, can be made
Equipment increases network interface easily, and the popularization and application and the modern life in particular with IPv6 are developed rapidly, institute of the present invention
The realization of elaboration just has more great meaning.
Brief description of the drawings
Fig. 1 is dual stack structure of the present invention；
Fig. 2 is dual stack handling process of the present invention.
Embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
Embodiment：A kind of network dual stack parallel process model, as shown in figure 1, including TCP/UDP protocol layers, network
Protocol layer of the interface, IPv4, IPv6 protocol layer, ICMPv4/ICMPv6 protocol layers；TCP/UDP protocol layers are used to recognize IPv4 data
Bag and IPv6 packets, network interface protocols layer are sent to the encapsulation of data link layer packets and by the data received
Upper strata, IPv4, IPv6 protocol layer realizes dual stack parallel processing work, and ICMPv4, ICMPv6 protocol layer is to receiving
The response of PING request reports is reported with PING requests are actively sent.
The main communication completed with hardware device of network interface protocols layer.The realization of this partial function is mainly：Ethernet
Control chip RTL8019AS interface drivers and the APR address resolution protocols for IPv4 stacks.When receiving data, network interface layer
The data received from network interface card are stored to buffering area, Ether frame header are obtained by read data, according to Ether frame header
Type field judges EtherType, so as to be transferred to corresponding processing.It is according to what the header of IP messages judged transmission when sending
IPv4 or IPv6 messages are packaged come the Ether frame to transmission.
The realization of IPv4 agreements is mainly the processing of ip protocol layer, including two aspects：First, the IP received is reported into
Row processing；Second, the lP sent according to the information processing of transport layer protocol is reported.
It is listed below the several primary functions realized：
（1）The bit checks of CreateIpHeadCrc () 16 and function
The function is that first IP headers add up in the way of 16, and accumulated result is if greater than OxFFFF, just 16 be higher by
Position is added with low 16, and end-results negates output.
（2）Send_lp4_Frame () IP reports send function
The function is mainly encapsulated IP layers of data by the demand of upper-layer protocol, and carries the data to Ethernet interface layer etc.
It is to be sent.The type of last layer agreement is specified in its input parameter, exactly have invoked Ethernet in this function connects
The transmission function Send_Ip4_To_LLC () of mouth layer.
（3）Ip4_PROCESS () IP reports receiver function
The receiver function Rec Ethernet Packed () of ethernet layer call the function, it reported by IP in protocol fields
Judge that the type of upper-layer protocol recalls the respective function of upper-layer protocol and handled.Treatable upper-layer protocol in the present invention
Type is ICMP, UDP and Transmission Control Protocol.
IPv6 agreements mainly realize the encapsulation, deblocking, the function of receiving and transmit of connectionless IP datagram, and system is realized
Including with minor function：
（1）IP6_Init () initialization function
The function mainly initialization Ipv6 protocol suites in each field parameter, and the agreement that may be included number, example
Such as：IP address in agreement, the type using agreement.
（2）Ip6-Process () IP reports receiver function
The network interface layer receiver function of lower floor calls this function to receive IPv6 datagrams.IP6_Process will realize following two
Individual function：
1. the checking of message
The verification of correctness of message, including check whether version number is correct, the whether short due length of the message length received, report
The purpose of text whether local interface etc..
2. and to upper-layer protocol datagram is transmitted
Datagram is transmitted to upper-layer protocol, is exactly, according to IP6_Head.nextheader (next header), message to be divided
Hair.If UDP messages, then the receiver function for calling the udp protocol on upper strata to realize if TCP message, then calls upper strata
The reception processing function that Transmission Control Protocol is realized.
（3）Send_lp6_Frame () IP reports send function
When sending data, function Send_IP6_Fram () will generally receive transmission message at two：IP forward module and IP
Agreement on layer.In the present invention, because the packet of system needs transmission is all smaller, system hardware resources are limited, Send_
IP6_Frame () processing procedure is not carried out burst function.When the function is called, although IPv6 stems are initial by upper strata
Change, but the version number and flow label field in IPv6 stems need for being sequentially converted into network bytes from host byte it is suitable
Sequence.
In icmp packet, echo request connects situation, PING works with return response message available for test two systems
What tool was utilized is exactly both messages, and the realization of ICMP agreements is mainly asked the PING received the response of report and actively sent out
Send PING request reports etc..The function realized the need for illustrating mainly below：
（1）Createlcmp4HeadCrc () verifies and calculated function
The function is responsible for reporting ICMPv4 the calculating for verifying sum, verification and function of the specific algorithm referring to IPV4 header
CreateIPHeadCrc()。
（2）Ping_Process sends PING claim frames
The function is primarily used to send PING request reports, and function operationally sets ICMP reports according to input parameter first
Buffer area is sent, then calls Send_Ip4_Framed () function to be transmitted.
（3）ICMPv4_Process ICMPv4 request report processing
The function mainly handles the ICMPv4 request reports received, the type field that function is operationally reported according to ICMPv4 first
Whether what judgement was received is PING claim frames, if it is, PING acknowledgement frames are set according to the PING claim frames received,
Then call IP layers of transmission function Send_IP4seFrame () that PING acknowledgement frames are sent.
（4）ICMPv4_Send () sends ICMPv4 messages
The function is primarily used to send ICMPv4 information reports, IP preceding 20 bytes reported is copied to first the hair of ICMPv4 reports
Buffering area is sent, each field that ICMPv4 is reported then is set according to type and operation etc., Send_IP4_Framed is finally called
() function is transmitted.
ICMPv6 is ICMPv4 follow-up version, and it is functionally expanded original ICMPv4 agreements,
ICMPv6 includes error message and infomational message, and error message is used for reporting mistake of the IPv6 bags in transmission and repeating process.
Infomational message is divided into 3 classes：Diagnose message, manage the message and neighbor discovery messages of multicast group.It is different from ICMPv4,
ICMPv6 responds ECHO orders to check whether network connects, and does not make the realization of the order in the present invention.
Various protocols type and function are defined in ICMPv6, if realizing repertoire, it is necessary to take substantial amounts of system
Resource.Therefore, the present invention realizes address resolution function for ICMPv6 agreements just with Neighbor Discovery Protocol.
Address resolution procedure is completed by ARP protocol in IPv4 agreements, and in IPv6 agreements, Neighbor Discovery Protocol
The address resolution protocol in IPv4, the router in Internet Control Message Protocol is realized to find part, redirect all of agreement
Function, and carried out certain extension.Neighbor Discovery Protocol solves the interoperability between all nodes on same link
Problem, address resolution procedure is completed by neighbor request and neighbours' declaration message.Because the present invention is not carried out routeing work(
Can, therefore acquiescence destination address is next-hop destination address, explained later address resolution procedure：
When node sends packet to destination, sender is checked in neighbor cache table with whetheing there is purpose IP according to destination address
The corresponding link layer address in location.If not recording the related list item of the purpose IP address in neighbor cache table to exist, it is created that
The record, while the datagram that will be sent is placed in queue, and starts address resolution procedure, the process of address resolution is to send
One neighbor request information, and wait neighbours' declaration message.When receiving neighbours' declaration response, by the response
Hardware address is recorded in neighbor cache table, starts simultaneously at the datagram for sending and being placed in queue.When starting transmission datagram,
Sender detects related reachability information according to the unreachable detection algorithm of neighbours, the accessibility of neighbours is verified, due to the present invention
Routing function is not carried out, to put it more simply, the unreachable protocol detection algorithm of neighbours here only detects the purpose of new data packets
Whether address is identical with existing destination address in neighbor cache table, if difference begins to new address resolution procedure.
Claims (6)
1. a kind of network dual stack parallel process model, it is characterised in that：Including TCP/UDP protocol layers, network interface protocols
Layer, IPv4, IPv6 protocol layer, ICMPv4/ICMPv6 protocol layers；The TCP/UDP protocol layers be used for recognize IPv4 packets and
IPv6 packets, the network interface protocols layer is sent to the encapsulation of data link layer packets and by the data received
Upper strata, IPv4, IPv6 protocol layer realizes that dual stack parallel processing works, ICMPv4, ICMPv6 protocol layer docking
The response of the PING request reports received is reported with PING requests are actively sent.
2. the processing method of network dual stack parallel process model according to claim 1, it is characterised in that：First will
The information intercepted and captured in physical layer submits to data link layer, and the frame received is analyzed in MAC layer, now just can root
IPv4 bags or IPv6 bags are distinguished according to the respective field in frame, encapsulation process continues up layer after terminating and submitted, in network
Layer is that IPv4 bags or IPv6 bags realize dual stack to do corresponding processing according to bag is collected from bottom, and processing terminates follow-up
Continue the respective handling submitted to upper strata and be transmitted layer, until the application of upper-layer user.
3. the processing method of network dual stack parallel process model according to claim 2, it is characterised in that：IPv4 is assisted
The realization of view includes two aspects：First, the IP reports received are handled；Second, at the information of transport layer protocol
The lP sent that gets a haircut is reported；The realization of IPv4 agreements is included with minor function：
（1）The bit checks of CreateIpHeadCrc () 16 and function
The function is that first IP headers add up in the way of 16, and accumulated result is if greater than OxFFFF, just 16 be higher by
Position is added with low 16, and end-results negates output；
（2）Send_lp4_Frame () IP reports send function
The function is mainly encapsulated IP layers of data by the demand of upper-layer protocol, and carries the data to Ethernet interface layer etc.
It is to be sent, the type of last layer agreement is specified in its input parameter, exactly have invoked Ethernet in this function connects
The transmission function Send_Ip4_To_LLC () of mouth layer；
（3）Ip4_PROCESS () IP reports receiver function
The receiver function Rec Ethernet Packed () of ethernet layer call the function, it reported by IP in protocol fields
Judge that the type of upper-layer protocol recalls the respective function of upper-layer protocol and handled.
4. the processing method of network dual stack parallel process model according to claim 2, it is characterised in that：IPv6 is assisted
View realizes the encapsulation, deblocking, the function of receiving and transmit of connectionless IP datagram, and realizing is included with minor function：
（1）IP6_Init () initialization function
The function mainly initialization Ipv6 protocol suites in each field parameter, and the agreement that may be included number；
（2）Ip6-Process () IP reports receiver function
The network interface layer receiver function of lower floor calls this function to receive IPv6 datagrams, and IP6_Process will realize message
Verify and transmit two functions of datagram to upper-layer protocol；The verification of correctness of message includes checking whether version number is correct, receives
The whether short due length of the message length arrived, the purpose of message whether local interface etc.；To upper-layer protocol transmission datagram just
It is, according to next header, message to be distributed, if UDP messages, then the reception letter for calling the udp protocol on upper strata to realize
Number, if TCP message, then calls the reception processing function of upper TCP protocol realization；
（3）Send_lp6_Frame () IP reports send function
When sending data, function Send_IP6_Fram () will generally receive transmission message at two：IP forward module and IP layers
On agreement.
5. the processing method of network dual stack parallel process model according to claim 2, it is characterised in that：ICMP is reported
Wen Zhong, echo request and return response message connect situation available for test two systems, and what PING instruments were utilized is exactly this
Two kinds of messages, the realization of ICMP agreements mainly asks the response of report to the PING received and actively sends PING request reports
Deng；Realizing is included with minor function：
（1）Createlcmp4HeadCrc () verifies and calculated function
The function is responsible for reporting ICMPv4 the calculating for verifying sum, verification and function of the specific algorithm referring to IPV4 header
CreateIPHeadCrc()；
（2）Ping_Process sends PING claim frames
The function is mainly used to send PING request reports, and function operationally sets the hair of ICMP reports according to input parameter first
Buffer area is sent, then calls Send_Ip4_Framed () function to be transmitted；
（3）ICMPv4_Process ICMPv4 request report processing
The function mainly handles the ICMPv4 request reports received, the type field that function is operationally reported according to ICMPv4 first
Whether what judgement was received is PING claim frames, if it is, PING acknowledgement frames are set according to the PING claim frames received,
Then call IP layers of transmission function Send_IP4seFrame () that PING acknowledgement frames are sent；
（4）ICMPv4_Send () sends ICMPv4 messages
The function is used for sending ICMPv4 information reports, and the transmission that IP preceding 20 bytes reported are copied to ICMPv4 reports first is buffered
Area, then sets each field that ICMPv4 is reported according to type and operation etc., finally calls Send_IP4_Framed () function
It is transmitted.
6. the processing method of network dual stack parallel process model according to claim 2, it is characterised in that：For
ICMPv6 agreements realize address resolution function using Neighbor Discovery Protocol：When node sends packet to destination, sender
Check in neighbor cache table whether there is the corresponding link layer address of purpose IP address according to destination address；If do not had in neighbor cache table
The list item related with the presence of the purpose IP address is recorded, is created that the record, while the datagram that will be sent is placed in queue,
And starting address resolution procedure, the process of address resolution is to send a neighbor request information, and waits neighbours' declaration
Message；When receiving neighbours' declaration response, the hardware address of the response is recorded in neighbor cache table, hair is started simultaneously at
Veer away the datagram in queue；When starting transmission datagram, sender detects related according to the unreachable detection algorithm of neighbours
Reachability information, verify the accessibility of neighbours.
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| CN110086689A (en) * | 2019-04-22 | 2019-08-02 | 杭州迪普科技股份有限公司 | A kind of double stack BFD detection methods and system |
| CN110891073A (en) * | 2019-12-30 | 2020-03-17 | 西安电子科技大学 | Multi-protocol stack communication method for mobile communication core network |
| CN111800488A (en) * | 2020-06-23 | 2020-10-20 | 翱捷科技股份有限公司 | Data transmission method and system based on UDP (user Datagram protocol) and IPV6 (Internet protocol video protocol) protocols |
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| CN110086689A (en) * | 2019-04-22 | 2019-08-02 | 杭州迪普科技股份有限公司 | A kind of double stack BFD detection methods and system |
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| CN111800488B (en) * | 2020-06-23 | 2023-01-24 | 翱捷科技股份有限公司 | Data transmission method and system based on UDP (user Datagram protocol) and IPV6 (Internet protocol video protocol) |
| CN111800488A (en) * | 2020-06-23 | 2020-10-20 | 翱捷科技股份有限公司 | Data transmission method and system based on UDP (user Datagram protocol) and IPV6 (Internet protocol video protocol) protocols |
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| CN114268583A (en) * | 2021-11-26 | 2022-04-01 | 网络通信与安全紫金山实验室 | Dual-stack backbone network management method and device based on SDN, and electronic equipment |
| CN114268583B (en) * | 2021-11-26 | 2024-01-23 | 网络通信与安全紫金山实验室 | SDN-based dual-stack backbone management method and device and electronic equipment |
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