CN108566387B - Method, equipment and system for data distribution based on UDP protocol - Google Patents
Method, equipment and system for data distribution based on UDP protocol Download PDFInfo
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- CN108566387B CN108566387B CN201810256473.6A CN201810256473A CN108566387B CN 108566387 B CN108566387 B CN 108566387B CN 201810256473 A CN201810256473 A CN 201810256473A CN 108566387 B CN108566387 B CN 108566387B
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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]
- H04L69/164—Adaptation or special uses of UDP protocol
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
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- H04L61/256—NAT traversal
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Abstract
The invention provides a method, equipment and a system for data distribution based on a UDP protocol, and relates to the technical field of data transmission. The method comprises the steps that sending equipment encapsulates data information to be sent into datagrams based on a UDP protocol, and carries out grouping and sequencing on the datagrams; the network address translation equipment carries out IP and port replacement on the datagram after packet sequencing and transmits the replaced datagram through a network; and the network address conversion and distribution equipment receives the datagram, copies the datagram and transmits the datagram to each receiving equipment. The invention realizes the transmission of the packet datagram based on the UDP protocol, dynamically adjusts the transmission rate through parameter configuration, realizes the high-speed distribution and quick retransmission mechanism of batch files, and reduces the public network overhead.
Description
Technical Field
The present invention relates to the technical field of data transmission, and in particular to a method for data distribution based on a UDP protocol, a network address translation distribution device, a system for data distribution based on a UDP protocol, a computer device, and a computer-readable storage medium.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
With the development of Internet technology, the number of Network terminals is on the increasing trend, and the demand for Internet Protocol addresses (IP addresses for short) is increased dramatically, which forces people, large organizations and companies to rely more and more on Network Address Translation (NAT) technology. One or more NAT traversals are inevitably required for a packet to be transmitted over the network. Most NAT Traversal (NAT Traversal) requires a public server through which all data is relayed, which presents a problem of public network bandwidth overhead. In a large enterprise, large-scale data transmission and distribution are often performed across regions and networks, and a Long Fat Network (LFN for short) environment (as shown in fig. 1) caused by a Network delay problem is unavoidable, so that the problem is more obvious.
To solve the bandwidth overhead problem, the network transport protocol is known first. The most common reliable Transmission Protocol is Transmission Control Protocol (TCP Protocol for short), but the TCP Protocol needs to go through a connection establishment phase, the packet header is complex, the system overhead is large, if a network condition is detected to be bad or a packet is lost, a Transmission window is reduced, and after the Transmission window is reduced, the Transmission window cannot be recovered in a short time, which causes certain restrictions on the Transmission speed and also puts higher requirements on software and hardware resources of the system. However, the UDP message also has the disadvantages such as not providing packet grouping, assembling and not being able to sequence the data packets, that is, after the message is sent, it cannot be known whether the data packet arrives safely and completely, and the reliability is poor because the UDP Protocol has no reliability guarantee, sequence guarantee, flow control field, and the like.
Therefore, how to provide a new solution, which can solve the above technical problems, is a technical problem to be solved in the art.
Disclosure of Invention
In view of the above, the present invention provides a method for data distribution based on UDP protocol, a network address translation distribution device, a system for data distribution based on UDP protocol, a computer device, and a computer readable storage medium, which implement transmission of packet datagrams based on UDP protocol, and dynamically adjust transmission rate through parameter configuration, thereby implementing high-speed distribution and fast retransmission mechanism of batch files, and reducing public network overhead.
One of the objectives of the present invention is to provide a method for data distribution based on UDP protocol, which includes:
the sending equipment encapsulates data information to be sent into datagrams based on a UDP protocol, and carries out grouping and sequencing on the datagrams;
the network address translation equipment carries out IP and port replacement on the datagram after packet sequencing and transmits the replaced datagram through a network;
and the network address conversion and distribution equipment receives the datagram, copies the datagram and transmits the datagram to each receiving equipment.
One of the purposes of the present invention is to provide a system for data distribution based on UDP protocol, which includes a sending device, a network address translation distribution device, and a plurality of receiving devices;
the sending device is used for encapsulating the data information to be sent into datagrams based on a UDP protocol and performing packet sequencing on the datagrams;
the network address translation equipment is used for carrying out IP and port replacement on the datagram after packet sequencing and transmitting the replaced datagram through a network;
and the network address conversion and distribution equipment is used for receiving the datagram, copying the datagram and transmitting the datagram to each receiving equipment.
One of the objects of the present invention is to provide a computer device comprising a processor adapted to implement instructions and a storage device storing instructions adapted to be loaded by the processor and to perform a method for data distribution based on UDP protocol.
It is an object of the present invention to provide a computer-readable storage medium storing a computer program for executing a method for data distribution based on the UDP protocol.
One of the objectives of the present invention is to provide a network address translation distribution device, which includes a routing table device, a receiving device, a queue container device, a packet multiplexing device, an address translation device, and a transmitting device, wherein the receiving device is configured to receive a datagram;
the queue container device is used for loading the datagram when the queue capacity device is vacant, otherwise, the queue congestion information is sent to the sending device;
the routing table device is used for sending indication information to the packet multiplexing device when the forwarding identifier in the datagram is not 0, otherwise sending distribution information to the sending device;
the sending device is used for distributing the datagram according to the distribution information;
the packet replication device is used for performing packet replication operation according to the indication information and sending the obtained datagram to the address conversion device;
and the address conversion device is used for carrying out address conversion on the datagram obtained by the packet replication operation and then distributing the datagram through the sending device.
The invention has the advantages that the invention provides a method for distributing data based on UDP protocol, a system for distributing data based on UDP protocol, computer equipment and computer readable storage medium, which can confirm the received file, realize the functions of disordered rearrangement, packet loss retransmission, data packet check, flow control and the like, and can realize NAT traversal, high-speed data distribution and packet loss quick retransmission under the distributed network by combining with the network address conversion distribution equipment, thereby overcoming the limitation of network bandwidth. The method is suitable for the data transmission and distribution scenes of cross-node, cross-region and cross-network, and greatly saves the public network overhead. Through parameter adjustment, the method can flexibly adapt to various network environments and can adaptively adjust the transmission rate in work.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art long manure network;
fig. 2 is a block diagram of a data distribution system based on UDP protocol according to an embodiment of the present invention;
fig. 3 is a block diagram of a transmitting device according to an embodiment of the present invention;
fig. 4 is a block diagram of a network address translation distribution device according to an embodiment of the present invention;
fig. 5 is a block diagram of a receiving device according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for data distribution based on the UDP protocol according to an embodiment of the present invention;
fig. 7 is a modified structure diagram of a datagram based UDP protocol used in the present invention;
FIG. 8 is a flow chart illustrating datagram transmission in accordance with an embodiment of the present invention;
fig. 9 is a schematic diagram illustrating a flow of a successful transmission feedback message in an embodiment of the present invention;
fig. 10 is a schematic diagram illustrating a flow of a transmission failure feedback message in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a system, apparatus, method or computer program product. Accordingly, the present disclosure may be embodied in the form of: entirely hardware, entirely software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.
The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments of the invention.
Fig. 2 is a schematic structural diagram of a system for performing data distribution based on a UDP protocol, and referring to fig. 2, the system provided by the present invention includes a sending device 001, a network address translation device 003, a network address translation distribution device 004, and a plurality of receiving devices 006.
Referring to fig. 2, in the specific architecture diagram shown in fig. 2, a transmitting device 001 and a network address translation device 003 form a transmitting cluster 002, and one or more receiving devices 006 and a network address translation distributing device 004 form a receiving cluster.
The sending device 001 is configured to encapsulate data information to be sent into datagrams based on a UDP protocol, and perform packet sequencing on the datagrams;
the network address translation device 003 is configured to perform IP and port replacement on the packet sequenced datagram, and transmit the replaced datagram through the network 007, where the network 007 is as follows: the Internet.
The network address translation distribution device 004 is configured to receive the datagram, copy the datagram, and transmit the copied datagram to each receiving device 006.
The sending device 001, the network address translation distributing device 004 and the receiving device 006 in the system shown in fig. 2 are original inventions of the present invention. For a one-to-many distribution scenario in which data is transmitted from one sending device to multiple receiving devices, the sending device and the network address translation distribution device are each configured as one set, a receiving unit may be configured with multiple sets (it is assumed in fig. 2 that N sets of dnats are configured), and each set of receiving devices (i.e., receiving devices 1 to N) may be configured to a single computer device or different devices.
The user encapsulates the data information to be transmitted into the datagram based on the UDP protocol through the sending equipment, and sends out the datagram after the datagram is grouped and sequenced, and the sending equipment can control the transmission speed in the preferred embodiment; after IP and port replacement of the datagram is carried out by the network address conversion equipment and the datagram is transmitted through the network, the datagram is quickly copied by the network address conversion distribution equipment in multiple copies and is accurately and quickly transmitted to each receiving equipment according to a preset distribution strategy, and each receiving equipment is ensured to completely acquire data.
In one embodiment provided by the present invention, the sending device comprises a datagram marking means 101 and a datagram sending means 103.
The datagram marking device 101 is configured to add a pseudo header to a header of a datagram encapsulated in a UDP protocol, and mark a forwarding identifier, a source IP address, a destination IP address, a packet number, and a sequence number;
specifically, according to the improved datagram structure based on the UDP protocol (as shown in fig. 7), the datagram marking device 101 needs to add a pseudo header to the header of the datagram cut by the UDP protocol, and mark the forwarding identifier Did 401, the source IP address SIP 402, the destination IP address TIP 403, the packet number GN 404, and the sequence number SN 405 in sequence, which means as follows:
a) forwarding identifier Did: and the datagram forwarding mark is used as a judgment value for forwarding by the network address translation and distribution equipment addressing routing table. When the value of Did is 0, it indicates that the forwarding to Public IP corresponds to all Internal IP addresses; when the Did value is not 0, the forwarding is indicated to an Internal IP address determined by Public IP and Did together, otherwise, the forwarding is discarded;
b) source IP address SIP: identifying a datagram sending address;
c) target IP address TIP: identifying a datagram receiving address (Public IP);
d) group number GN: the packet number is used for combining a batch of marked datagrams into a whole for processing, and the successful confirmation and clearing of the datagram sending are carried out in the form of datagram groups. GN value is a byte, when the mark value reaches the maximum value, the mark value is reset to 1, a is a natural number and can be freely adjusted;
e) sequence number SN: when the serial number is used, the data reports in a data report group are sequenced, a certain data report in a certain range is uniquely identified by combining GN, the SN value is b bytes, the maximum value Z of the SN value is used as one of the adjustment factors of the sending window, and b is a natural number and can be freely adjusted.
The datagram sending device 103 is configured to send the datagram after performing packet sequencing on the datagram.
Fig. 3 is a block diagram of a transmitting apparatus according to an embodiment of the present invention, and referring to fig. 3, in the embodiment of the present invention, the transmitting apparatus further includes a datagram retransmitting apparatus 104 and a datagram waiting apparatus 102.
The datagram waiting device 102 is configured to buffer and store the packet sequenced datagrams;
the datagram retransmission device 104 is configured to receive retransmission feedback information sent by the network address translation and distribution device, obtain a datagram corresponding to the retransmission feedback information from the datagram sending device 103, and resend the datagram corresponding to the retransmission feedback information.
In this embodiment, the datagram waiting means 102 receives the datagram marked by the data marking means 101 and stores the datagram as a buffer before the datagram enters the datagram sending means 103. The datagram retransmission device 104 receives the retransmission feedback information of the network address translation distribution equipment, and acquires the datagram for retransmission from the datagram transmission device 103.
In an embodiment of the present application, the datagram sending device 103 is further configured to receive queue congestion information sent by the network address translation and distribution apparatus, and adjust a sending window factor according to the queue congestion information to control a sending rate. The datagram sending device 103 is a sending window of the datagram, and the maximum value of the number of the datagram groups which can be stored in the sending window is S, which is one of the sending window adjusting factors. The transmission window has a size W, which indicates the amount of data transmitted by the datagram transmitter 103 at one time, and W is sxz.
The following briefly describes the transmission workflow of the transmitting apparatus.
Initializing the datagram and marking a pseudo header;
grouping and sequencing the datagrams, and adjusting a sending window factor Z value according to queue congestion information of network address conversion and distribution equipment;
loading datagrams into datagram waiting means 102;
the scanning datagram transmitter 103 determines whether the transmission window is empty. If not, wait. If so, loading the datagram into the datagram sending means 103;
the datagram goes through the outlet to the network address translation device 003 to perform IP and port replacement, and is transmitted to the network address translation distribution apparatus through the public network.
The retransmission workflow of the transmitting apparatus is briefly described below.
Queue congestion information sent by the network address translation and distribution equipment is transmitted to the datagram retransmission device 104;
the datagram retransmission apparatus 104 determines the retransmitted datagram from the GN and SN information in the queue congestion information, and acquires the datagram from the transmission apparatus for retransmission.
Fig. 4 is a block diagram of a network address translation distribution device according to an embodiment of the present invention, referring to fig. 4, in an embodiment of the present invention, the network address translation distribution device includes a routing table apparatus 201, a receiving apparatus 202, a queue container apparatus 204, a packet multiplexing apparatus 205, an address translation apparatus 206, and a sending apparatus 207, where:
wherein, the receiving device 202 is configured to receive the datagram;
the queue container means 204 is configured to load the datagram when the queue capacity means is empty, and otherwise, send queue congestion information to the sending means;
the routing table device 201 is configured to send indication information to the packet multiplexing device when the forwarding identifier in the datagram is not 0, and send distribution information to the sending device otherwise.
The sending device 207 is configured to distribute the datagram according to the distribution information;
the packet replication device 205 is configured to perform packet replication operation according to the indication information, and send the obtained datagram to the address translation device;
the address translation device 206 is configured to perform address translation on the datagram obtained by the packet replication operation, and then distribute the datagram through the sending device.
In an embodiment of the present application, the receiving apparatus is further configured to receive retransmission feedback information sent by the receiving device;
and the queue container device is used for judging whether the datagram corresponding to the retransmission feedback information exists or not, if so, the datagram is sent to the receiving equipment through the sending device, otherwise, the retransmission feedback information is sent to the sending equipment through the sending device.
In an embodiment of the present application, the network address translation distribution apparatus further includes a statistics device 203.
In the present invention, the routing table device 201 mainly stores address conversion information of the public network and the internal network. Unlike the ordinary routing table, the routing table apparatus of the present invention supports one-to-many distribution support for forwarding the same datagram to multiple receiving devices by setting up the forwarding identifier Did field. When the datagram arrives at the queue container 204, the routing table 201 scans the datagram information and matches it with the routing table configuration information according to the field of the forwarding identifier Did, generates packet replication information and packet header address modification information according to the matching result, and transmits the packet replication information to the packet replication device 205 and the packet header address modification information to the address translation device 206.
The receiving device 202 is responsible for receiving datagram information transmitted in the public network and feedback information of the internal network, and serves as buffer storage of the queue container device 204. The statistics device 203 obtains the feedback message received by the intranet from the receiving device 202, performs statistics on the information received by the receiving device 202, determines whether the datagram is successfully received, and feeds back the information to the queue container device 204 and the sending device 1. Queue container means 204 serves as a means for storing datagrams in the nat distribution device, providing source datagrams for packet multiplexing means, and providing a data source for fast datagram retransmission. A datagram is cleared when its residence time in queue container means 204 exceeds a threshold value M. The packet multiplexing means 205 obtains the datagram from the queue container means 204 according to the packet multiplexing information given by the routing table means 201 and copies it, and transmits the copied datagram to the address translation means 206. The address conversion means 206 modifies the datagram header address information from the packet multiplexing means 205 in accordance with the packet header address modification information given by the routing table means 201 and delivers the converted datagram to the transmission means 207. The sending means 207 is responsible for distributing datagrams from the address translation means 206.
The following briefly describes the distribution workflow of the network address translation distribution device.
The datagram enters the entrance direction and the receiving device 202 of the network address conversion and distribution device 4;
the scan queue container means 204 determines whether the queue container means 204 is empty. If not, the preamble datagram distribution in the waiting queue container apparatus 204 completes clearing, timeout clearing or retransmission clearing, and sends the queue congestion information to the sending unit, and adjusts the sending window W. If so, loading the datagram into queue container means 204;
the scan routing table means 201 determines whether IP, port and routing information is present in the datagram. If not, the datagram information is discarded in error, and the transmission fails; if yes, it is determined Did whether it is 0, if yes, the datagram needs to be distributed to all receiving devices 6, the ingress packet copying device 205 performs packet copying according to the information given by the routing table device 201, the datagram enters the address translation device 206 for address translation, and the datagram enters the sending device 207 for distribution to the receiving device. If Did is not 0, the datagram enters the sending device 207 for distribution to the receiving device.
The feedback workflow of the network address translation and distribution device is described in detail as follows:
1) success of receiving a certain datagram group
The network address translation and distribution equipment receives all datagram receiving success messages of a certain packet number fed back by any receiving equipment, and forwards the messages to the sending equipment;
the sending device receives the feedback message, and the datagram sending apparatus 103 of the sending device clears the group of datagram information, and the sending is successful.
2) Successful receipt of a datagram
The network address translation and distribution equipment receives a datagram successful receiving message fed back by the data feedback device 304 of a certain receiving equipment (named as an alpha receiving unit), the network address translation and distribution equipment forwards the message to the sending equipment, the sending equipment receives the feedback message, and the datagram sending device 103 of the sending equipment clears the group of datagram information, and the sending is successful.
The statistic device 203 of the network address conversion distribution equipment counts the feedback information, and the datagram counts the receiving success value + 1;
when all receiving units feed back that the datagram transmission is complete, queue container means 204 clears the datagram and statistics.
3) Failure of reception of a datagram
The network address translation distributing equipment receives a request of retransmitting the datagram a fed back by the data feedback device 304 of a certain receiving equipment (named as a beta receiving unit);
the network address translation and distribution equipment judges whether the datagram exists in the queue container device 204, if so, the network address translation and distribution equipment retransmits the datagram to the beta receiving device 6; if not, the network address translation and distribution device transmits a retransmission feedback message to the sending device, and clears the statistical information of the datagram, the sending device retransmits the datagram to the receiving cluster 005, and the datagram is cleared when the retention time of a certain datagram in the queue container device 204 exceeds the threshold value M.
Fig. 5 is a block diagram of a receiving device according to an embodiment of the present invention, referring to fig. 5, the receiving device includes a datagram receiving apparatus 301, a datagram identifying apparatus 302, a datagram storing apparatus 303, and a datagram feedback apparatus 304,
wherein, the datagram receiving device is used for receiving the datagram;
the datagram identification device is used for classifying, sorting and sorting according to the grouping number and the serial number of the datagram, sending the datagram to the datagram feedback device when the datagram corresponding to the grouping number is aligned, and storing the grouped datagram corresponding to the datagram storage device.
That is, the datagram receiving means 301 of the present application is responsible for receiving datagrams from the network and delivering them to the datagram identifying means 302 as buffer storage of the datagram identifying means 302. The datagram identifying device 302 obtains the datagram from the datagram receiving device 301, groups and sorts the datagram according to the GN and SN information of the datagram, waits for the arrival of the subsequent datagram, and enters the datagram storing device 303 until all the grouped datagrams are in order; or the datagram fails to be aligned and the retention time exceeds the threshold value N, the absence of the datagram a is checked, the timeout information is sent to the datagram feedback device 304, and when the datagram of the A packet reaches the complete state, the datagram storage device 303 enters all the datagrams of the A packet from the datagram identification device 302 into the datagram storage device 303 to wait for the acquisition of the upper layer application. The datagram feedback device 303 is responsible for receiving the receiving information fed back by the datagram receiving device 301 and the datagram identifying device 302, and generating a message to be fed back to the sender.
The following briefly describes the reception workflow of the reception apparatus.
A datagram receiving device 301 of the receiving equipment receives the datagram and transmits the datagram to a datagram identifying device 302 for sorting and sorting according to GN and SN information;
when all the datagrams with the packet numbers are ready, the datagram identification device 302 sends the information of the completion of all the datagrams with the packet numbers to the datagram feedback device 304, and the completed datagram enters the datagram storage device 303 and is successfully received.
The invention also provides a computer device comprising a processor adapted to implement instructions and a storage device, the storage device storing a plurality of instructions, the instructions being adapted to be loaded and executed by the processor:
the sending equipment encapsulates data information to be sent into datagrams based on a UDP protocol, and carries out grouping and sequencing on the datagrams;
the network address translation equipment carries out IP and port replacement on the datagram after packet sequencing and transmits the replaced datagram through a network;
and the network address conversion and distribution equipment receives the datagram, copies the datagram and transmits the datagram to each receiving equipment.
The present invention also provides a computer-readable storage medium storing a computer program for executing:
the sending equipment encapsulates data information to be sent into datagrams based on a UDP protocol, and carries out grouping and sequencing on the datagrams;
the network address translation equipment carries out IP and port replacement on the datagram after packet sequencing and transmits the replaced datagram through a network;
and the network address conversion and distribution equipment receives the datagram, copies the datagram and transmits the datagram to each receiving equipment.
The system, the network address translation and distribution device, the computer device and the computer readable storage medium for data distribution based on the UDP protocol provided by the present invention can complete the confirmation of the received file, implement the functions of disordered rearrangement, retransmission of lost packets, data packet verification, flow control, etc., and in combination with the network address translation and distribution device, can implement NAT traversal, high-speed data distribution, and fast retransmission of lost packets in a distributed network, thereby overcoming the limitation of network bandwidth. The method is suitable for the data transmission and distribution scenes of cross-node, cross-region and cross-network, and greatly saves the public network overhead. Through parameter adjustment, the method can flexibly adapt to various network environments and can adaptively adjust the transmission rate in work.
Furthermore, although in the above detailed description several unit modules of the system are mentioned, this division is not mandatory only. Indeed, the features and functions of two or more of the units described above may be embodied in one unit, according to embodiments of the invention. Also, the features and functions of one unit described above may be further divided into embodiments by a plurality of units. The terms "module" and "unit" used above may be software and/or hardware that realizes a predetermined function. While the modules described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
Having described the system for data distribution based on the UDP protocol according to an exemplary embodiment of the present invention, a method according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings. The implementation of the method can be referred to the above overall implementation, and repeated details are not repeated.
Fig. 6 is a flowchart of a method for data distribution based on the UDP protocol according to an embodiment of the present invention, please refer to fig. 6, where the method includes:
s101: and the sending equipment encapsulates the data information to be sent into a datagram based on a UDP protocol and carries out packet sequencing on the datagram.
In one embodiment of the invention, the sending device adds a dummy header to the header of the datagram encapsulated into the UDP protocol, marking the forwarding identifier, the source IP address, the destination IP address, the packet number, and the sequence number.
S102: the network address translation equipment carries out IP and port replacement on the datagram after packet sequencing and transmits the replaced datagram through the network.
S103: and the network address conversion and distribution equipment receives the datagram, copies the datagram and transmits the datagram to each receiving equipment.
In one embodiment of the invention, the method further comprises:
and the sending equipment receives the queue congestion information sent by the network address conversion and distribution equipment, and adjusts a sending window factor according to the queue congestion information to control the sending rate.
In one embodiment of the invention, the method further comprises:
and the sending equipment receives the retransmission feedback information of the network address conversion and distribution equipment and acquires the datagram for retransmission.
In one embodiment of the invention, the method further comprises:
the network address conversion and distribution equipment receives the retransmission feedback information sent by the receiving equipment;
and judging whether the datagram corresponding to the retransmission feedback information exists, if so, sending the datagram to the receiving equipment, otherwise, sending the retransmission feedback information to the sending equipment.
In one embodiment of the invention, the method further comprises: receiving the datagram by a receiving device;
and sorting, sorting and sorting according to the packet number and the sequence number of the datagram, sending finish information when the datagrams corresponding to the packet number are finished, and storing the datagrams corresponding to the packets.
The invention provides a method for distributing data based on a UDP protocol, which realizes the transmission of packet datagrams based on the UDP protocol, realizes a datagram confirmation and retransmission mechanism through a sequence number error correction and verification mechanism, dynamically adjusts the transmission rate through parameter configuration, improves an address conversion device to realize a high-speed distribution and quick retransmission mechanism of batch files, and reduces the public network overhead.
The following describes the technical solution of the present invention in detail through specific embodiments provided by the present invention, in conjunction with the accompanying drawings of the present invention. Fig. 8 is a schematic diagram of a datagram transmission process according to an embodiment of the present invention, please refer to fig. 8, the datagram transmission process includes:
s501: initializing the datagram, marking a pseudo header, and turning to step S502;
s502: grouping and sequencing the data reports, adjusting the value of a sending window factor Z according to dNAT feedback information, and turning to step S503;
s503: loading the datagram into the datagram waiting device 102, and going to step S504;
s504: the scanning datagram transmitter 103 determines whether the transmission window is empty. If not, wait. If yes, go to step S505;
s505: loading the datagram into the datagram sending device 103, and going to step S506;
s506: the datagram carries on IP and port replacement through the network address translation device 003 of exit direction, and convey to the address translation of the network and distribute the apparatus through the public network;
s507: the datagram enters the entrance direction and the receiving device 202 of the network address conversion and distribution equipment 4;
s508: the scan queue container means 204 determines whether the queue container means 204 is empty. If not, go to step S509, and send the queue congestion information to the sending unit, adjust the sending window W. If yes, go to step S510;
s509: wait for the completion of the distribution of the preamble datagram in the queue container means 204 to clear, clear overtime, or clear for retransmission;
s510: loading datagrams into queue container means 204;
s511: the routing table device 201 is scanned to determine whether IP, port, and routing information exists in the datagram. If not, go to step S512; if yes, go to step S513;
s512: the datagram message is discarded incorrectly and the transmission fails.
S513: judging whether the dID is 0, if so, turning to step S514; if not, go to step S516;
s514: the datagram needs to be distributed to all receiving devices 6, enters the packet replication device 205 to perform packet replication according to the information given by the routing table device 201, and goes to step S515;
s515: the datagram enters the address translation device 206 for address translation, and goes to step S516;
s516: the datagram enters the sending device 207 and is distributed to the receiving device 6.
S517: the receiving unit datagram receiving device 301 receives the datagram and transmits the datagram to the datagram identifying device 302 for sorting and sorting according to the GN and SN information, and then goes to step S518;
s518: and judging whether all the datagrams of the packet number are aligned or not. If not, go to step S517; if yes, go to step S519;
s519: the datagram identifying device 302 sends the information of all the datagrams in the packet number to the datagram feedback device 304, and the datagram in the datagram feeding device 303 enters the datagram storing device 303 and the datagram is successfully received.
Fig. 9 is a schematic diagram of a flow of a successful transmission feedback message in an embodiment of the present invention, please refer to fig. 9, where the flow of the successful transmission feedback message includes:
s601: any receiving device successfully receives datagram a of the packet;
s602: judging whether the grouped data are in order, if so, executing step S603, otherwise, executing step S602;
s603: the receiving device transmitting the completion packet;
s604: the network address translation and distribution device receives all datagram receiving success messages of a certain packet number fed back by the data feedback device 301 of any receiving device, and goes to step S605;
s605: the dNAT forwards the message to the sending equipment, and the step S606 is carried out;
s606: the sending device receives the feedback message, and the datagram sending apparatus 103 of the sending device clears the group of datagram information, and the sending is successful.
Successful reception of a datagram:
s607: the data feedback device feeds back the success of the datagram transmission;
s608: the network address translation and distribution device receives a successful datagram reception message fed back by the data feedback device 304 of a receiving device (named as an alpha receiving unit), and goes to step S605;
s609: the statistic device 203 counts the feedback information, and the datagram counts the received success value +1, go to step S610;
s610: judging whether all receiving devices feed back the completion of the datagram transmission, if so, turning to step S611; if not, go to step S601;
s611: queue container means 204 clears the datagram and statistics.
Fig. 10 is a schematic diagram of a flow of a transmission failure feedback message in an embodiment of the present invention, please refer to fig. 10, where a datagram reception failure and transmission failure feedback message flow includes:
s701: some packet data reports in the data identification device of any receiving equipment are not up and the retention time exceeds the value of a threshold value N, and the absence of the datagram a is checked;
s702: the data feedback device feeds back the request retransmission datagram a;
s703: the network address translation distributing equipment receives a request of retransmitting the datagram a fed back by the data feedback device 304 of a certain receiving equipment (named as a beta receiving unit);
s704: the network address translation and distribution device determines whether the datagram exists in the queue container means 204, if yes, go to step S705; if not, go to step S706;
s705: the network address translation distribution apparatus retransmits the datagram to the β receiving device 6.
S706: the network address conversion and distribution equipment transmits the retransmission feedback message to the sending equipment, and clears the statistical information of the datagram, and then the step S707 is switched to;
s707: the transmitting device retransmits the datagram to the receiving cluster 005.
S708: a datagram is cleared when its residence time in queue container means 204 exceeds a threshold value M.
In summary, the present invention provides a method for data distribution based on UDP protocol, a network address translation distribution device, a system for data distribution based on UDP protocol, a computer device, and a computer readable storage medium, which provide a mechanism for implementing transmission of packet datagrams based on UDP protocol, implementing datagram acknowledgement and retransmission by a sequence number error correction and verification mechanism, dynamically adjusting transmission rate by parameter configuration, and improving an address translation device to implement a mechanism for high-speed distribution and fast retransmission of a batch of files, thereby reducing public network overhead. Specifically, the invention can obtain the following advantages:
1. compared with the traditional data distribution mode, the method greatly reduces the public network overhead, realizes the quick retransmission function, and greatly improves the efficiency aiming at large-scale data distribution of large enterprises in cross-network clusters and cross-regions;
2. compared with the traditional TCP protocol, the bandwidth limitation in the long-fertile network environment is overcome, and the network transmission efficiency and the system overhead are improved; compared with a UDP protocol, the packet loss rate is greatly reduced, and the accuracy is comparable to that of TCP;
3. the security isolation of the network protocol layer is realized, and the security of the internal network of the organization is ensured.
Improvements to a technology can clearly be distinguished between hardware improvements (e.g. improvements to the circuit structure of diodes, transistors, switches, etc.) and software improvements (improvements to the process flow). However, as technology advances, many of today's process flow improvements have been seen as direct improvements in hardware circuit architecture. Designers almost always obtain the corresponding hardware circuit structure by programming an improved method flow into the hardware circuit. Thus, it cannot be said that an improvement in the process flow cannot be realized by hardware physical modules. For example, a Programmable Logic Device (PLD), such as a Field Programmable Gate Array (FPGA), is an integrated circuit whose Logic functions are determined by programming the Device by a user. A digital system is "integrated" on a PLD by the designer's own programming without requiring the chip manufacturer to design and fabricate application-specific integrated circuit chips. Furthermore, nowadays, instead of manually making an Integrated Circuit chip, such Programming is often implemented by "logic compiler" software, which is similar to a software compiler used in program development and writing, but the original code before compiling is also written by a specific Programming Language, which is called Hardware Description Language (HDL), and HDL is not only one but many, such as abel (advanced Boolean Expression Language), ahdl (alternate Language Description Language), traffic, pl (core unified Programming Language), HDCal, JHDL (Java Hardware Description Language), langue, Lola, HDL, laspam, hardbyscript Description Language (vhr Description Language), and the like, which are currently used by Hardware compiler-software (Hardware Description Language-software). It will also be apparent to those skilled in the art that hardware circuitry that implements the logical method flows can be readily obtained by merely slightly programming the method flows into an integrated circuit using the hardware description languages described above.
The controller may be implemented in any suitable manner, for example, the controller may take the form of, for example, a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an Application Specific Integrated Circuit (ASIC), a programmable logic controller, and an embedded microcontroller, examples of which include, but are not limited to, the following microcontrollers: the ARC625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicone Labs C8051F320, the memory controller may also be implemented as part of the control logic for the memory.
Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may thus be considered a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be essentially or partially implemented in the form of software products, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and include instructions for causing a computer system (which may be a personal computer, a server, or a network system, etc.) to execute the methods described in the embodiments or some parts of the embodiments of the present application.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable systems, tablet-type systems, multiprocessor systems, microprocessor-based systems, set top boxes, programmable consumer electronics systems, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or systems, and the like.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing systems that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage systems.
While the present application has been described with examples, those of ordinary skill in the art will appreciate that there are numerous variations and permutations of the present application without departing from the spirit of the application, and it is intended that the appended claims encompass such variations and permutations without departing from the spirit of the application.
Claims (8)
1. A system for data distribution based on UDP protocol, characterized in that the system comprises a sending device, a network address translation distribution device and a plurality of receiving devices,
the sending device is used for encapsulating the data information to be sent into datagrams based on a UDP protocol and performing packet sequencing on the datagrams;
the network address translation equipment is used for carrying out IP and port replacement on the datagram after packet sequencing and transmitting the replaced datagram through a network;
the network address conversion and distribution equipment is used for receiving the datagram, copying the datagram and transmitting the datagram to each receiving equipment;
the network address conversion and distribution equipment comprises a receiving device, a queue container device and a sending device, wherein the receiving device is used for receiving retransmission feedback information sent by the receiving equipment when packet data reports are not complete and the retention time exceeds a threshold value N; the queue container device is configured to determine whether a data packet corresponding to the retransmission feedback information exists, and if yes, send the data packet to the receiving device through the sending device; otherwise, sending the retransmission feedback information to the sending equipment through the sending device; the datagram identification device in the receiving equipment determines that the grouped datagrams are not aligned according to the serial number SN of the datagram;
the sending device comprises a datagram marking device and a datagram sending device, wherein the datagram marking device is used for adding a pseudo header to a header of a datagram encapsulated into a UDP protocol, and the pseudo header comprises a forwarding identifier, a source IP address, a target IP address, a packet number and a sequence number; the datagram sending device is used for sending the datagram after packet sequencing;
the datagram sending device is further configured to receive queue congestion information sent by the network address translation and distribution device, and adjust a sending window factor according to the queue congestion information to control a sending rate.
2. The system according to claim 1, wherein said transmission apparatus further comprises datagram retransmission means and datagram waiting means,
the datagram waiting device is used for buffering and storing the datagrams after the grouping and sequencing;
the datagram retransmitting device is used for receiving the retransmission feedback information sent by the network address conversion and distribution device, obtaining the datagram corresponding to the retransmission feedback information from the datagram sending device, and retransmitting the datagram corresponding to the retransmission feedback information.
3. The system of claim 1, wherein the network address translation distribution device further comprises a routing table means, a packet multiplexing means, and an address translation means,
wherein, the receiving device is used for receiving the datagram;
the queue container device is used for loading the datagram when the queue container device is vacant, otherwise, the queue container device sends queue congestion information to the sending device;
the routing table device is used for sending indication information to the packet multiplexing device when the forwarding identifier in the datagram is not 0, otherwise sending distribution information to the sending device;
the sending device is used for distributing the datagram according to the distribution information;
the packet replication device is used for performing packet replication operation according to the indication information and sending the obtained datagram to the address conversion device;
and the address conversion device is used for carrying out address conversion on the datagram obtained by the packet replication operation and then distributing the datagram through the sending device.
4. The system of claim 3, wherein said receiving device comprises datagram receiving means, datagram identifying means, datagram storing means, and datagram feedback means,
wherein, the datagram receiving device is used for receiving the datagram;
the datagram identification device is used for classifying, sorting and sorting according to the packet number and the serial number of the datagram, sending the datagram to the datagram feedback device when the datagram corresponding to the packet number is aligned, and storing the datagram corresponding to the packet number to the datagram storage device.
5. A network address translation distribution device is characterized by comprising a routing table device, a receiving device, a queue container device, a packet multiplexing device, an address translation device and a sending device,
the receiving device is used for receiving a datagram, wherein the datagram is processed by the following processing when being sent, the datagram marking device in the sending equipment adds a pseudo header to the header of the datagram encapsulated into a UDP protocol, and the pseudo header comprises a forwarding identifier, a source IP address, a target IP address, a packet number and a sequence number; a datagram sending device in sending equipment carries out grouping sequencing on the datagrams;
the queue container device is used for loading the datagram when the queue container device is vacant, otherwise, sending queue congestion information to the sending device, so that the datagram sending device in sending equipment can adjust a sending window factor according to the queue congestion information to control the sending rate;
the routing table device is used for sending indication information to the packet multiplexing device when the forwarding identifier in the datagram is not 0, otherwise sending distribution information to the sending device;
the sending device is used for distributing the datagram according to the distribution information;
the packet replication device is used for performing packet replication operation according to the indication information and sending the obtained datagram to the address conversion device;
the address conversion device is used for carrying out address conversion on the datagram obtained by the packet replication operation and then distributing the datagram through the sending device;
the receiving device is also used for receiving retransmission feedback information sent by the receiving equipment when the packet data reports are not in order and the retention time exceeds a threshold value N; the datagram identification device in the receiving equipment determines that the grouped datagrams are not aligned according to the serial number SN of the datagram;
the queue container device is further configured to determine whether a data packet corresponding to the retransmission feedback information exists, and if yes, send the data packet to the receiving device through the sending device; otherwise, the retransmission feedback information is sent to the sending equipment through the sending device.
6. A method for data distribution based on UDP protocol, the method comprising:
the sending equipment encapsulates data information to be sent into datagrams based on a UDP protocol, and carries out grouping and sequencing on the datagrams; the sending equipment comprises a datagram marking device, a sending device and a sending device, wherein the datagram marking device in the sending equipment adds a pseudo header to a header of a datagram encapsulated into a UDP protocol, and the pseudo header comprises a forwarding identifier, a source IP address, a target IP address, a packet number and a serial number; a datagram sending device in sending equipment carries out grouping sequencing on the datagrams;
the network address translation equipment carries out IP and port replacement on the datagram after packet sequencing and transmits the replaced datagram through a network;
the network address conversion and distribution equipment receives the datagram, copies the datagram and transmits the datagram to each receiving equipment;
a receiving device in the network address conversion and distribution equipment receives retransmission feedback information sent by the receiving equipment when packet data reports are not aligned and the retention time exceeds a threshold value N, wherein a datagram identification device in the receiving equipment determines that the packet data reports are not aligned according to a sequence number SN of the datagram; the queue container device in the network address translation and distribution equipment is used for judging whether a data packet corresponding to the retransmission feedback information exists or not, and when the data packet exists, the data packet is sent to the receiving equipment through the sending device in the network address translation and distribution equipment; otherwise, sending the retransmission feedback information to the sending equipment through the sending device;
and the datagram sending device in the sending equipment also receives queue congestion information sent by the network address conversion and distribution equipment, and adjusts a sending window factor according to the queue congestion information to control the sending rate.
7. A computer device, characterized in that the computer device comprises: a processor adapted to implement instructions and a storage device storing a plurality of instructions, the instructions being adapted to be loaded by the processor and to perform the method for UDP-based data distribution according to claim 6.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the UDP protocol based data distribution method according to claim 6.
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