CN112737797A - Message transmission system and method supporting unicast and broadcast - Google Patents
Message transmission system and method supporting unicast and broadcast Download PDFInfo
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- CN112737797A CN112737797A CN202110126528.3A CN202110126528A CN112737797A CN 112737797 A CN112737797 A CN 112737797A CN 202110126528 A CN202110126528 A CN 202110126528A CN 112737797 A CN112737797 A CN 112737797A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004590 computer program Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
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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
- H04L69/162—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields involving adaptations of sockets based mechanisms
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Abstract
The invention relates to the technical field of communication, in particular to a message transmission system and a message transmission method supporting unicast and broadcast, which comprise an intermediate forwarding module, wherein the intermediate forwarding module comprises a first judgment module, a second judgment module, a third judgment module and a fourth judgment module, the first judgment module is used for judging whether a data packet meets the specification or not, if so, a data sending module is called, and if not, a return module is called; the second judging module is used for judging whether the data packet which accords with the standard is a forwarding message, the third judging module is used for judging whether a sending source of the data packet which accords with the standard and is the forwarding message exists, and the fourth judging module is used for judging the forwarding type of the data packet according to the forwarding parameter. The method can avoid information congestion of the information transmission channel and congestion of the backbone network, reduce a large amount of useless information from being accumulated on the host of the application program, and reduce the occupation of the memory.
Description
Technical Field
The present invention relates to the field of information transmission technologies, and in particular, to a message transmission system and a message transmission method supporting unicast and broadcast.
Background
There are three types of TCP/IP transport: unicast, broadcast, multicast. Unicast (Unicast) transmission: a separate data channel is required between the sender and each recipient. There is generally no problem if a host transmits data to a very small number of recipients simultaneously. But is difficult to achieve if there are a large number of hosts that wish to obtain the same copy of the packet. This will result in heavy sender burden, long delay, network congestion; hardware and bandwidth are increased to ensure a certain quality of service. Multicast (Multicast) transmission: it improves data transfer efficiency. The possibility of congestion of the backbone network is reduced. The hosts in a multicast group may be in the same physical network or may be from different physical networks (if supported by a multicast router).
Broadcast (Broadcast) transmission: it is meant that packets are broadcast within the IP subnet and all hosts within the subnet will receive these packets. Broadcast means that the network delivers a packet to a subnet host regardless of whether the host is willing to receive the packet. The broadcast, however, is used only to a small extent and is only valid in the local subnet, since the router will block the broadcast traffic. Broadcast transmissions increase the overhead for non-recipients.
Aiming at the application program in the host in the field of the small public, the method has no right of rejecting the information, only uses the information transmission mode of broadcasting or multicasting, can increase the pressure of the whole information transmission channel, and is easy to cause the accumulation of useless information.
Disclosure of Invention
In view of the above, the present invention provides a message transmission system and a message transmission method supporting unicast and broadcast, so as to solve the problems in the background art.
The invention discloses a message transmission system supporting unicast and broadcast, which comprises an intermediate forwarding module, wherein a socket is opened between the intermediate forwarding module and a sending source in a connection-oriented mode, so that the data of the sending source is transmitted to a receiving source; the sending source and the intermediate forwarding module comprise an intermediate forwarding program and a plurality of application programs, and the intermediate forwarding program and the application programs open sockets through a connection-oriented TCP/IP protocol and transmit original data streams through the sockets.
The intermediate forwarding module comprises a connection module, a data processing module and a first judgment module, wherein the connection module is used for receiving a heartbeat packet of a sending source and determining the type and the current running state of the sending source; the data processing module is used for receiving the data packets of the transmitting source, and respectively carrying out unpacking analysis on the data packets to obtain forwarding parameters; the first judging module is used for judging whether the data packet conforms to the standard or not, if so, the data transmitting module is called, and if not, the return module is called; the data sending module is used for sending the data packet which meets the standard to the receiving source, and the returning module returns the reason why the data can not be sent unsuccessfully to the sending source.
Further, the intermediate forwarding module further includes a second decision module, where the second decision module is configured to determine whether a data packet meeting a specification is a forwarding message, if so, transmit data to a transmission source according to the forwarding parameter, and if not, end data transmission. The single application program is connected with the intermediate forwarding program at first and continuously sends heartbeat data packets to the intermediate forwarding program. The heartbeat data packet identifies the category and the current running state of the application program, wherein the category is represented by codes in a source module in the heartbeat data packet, the running state is represented by task numbers in the heartbeat data packet, when the task number in the heartbeat data packet is 255, the data is suspended from being received, and other task numbers represent receivable data.
Further, the intermediate forwarding module further includes a third determining module, where the third determining module is configured to determine whether a transmission source of a data packet that meets a specification and is forwarding information exists, and if the transmission source exists, determine whether the transmission source rejects, if not, transmit data to the transmission source according to the forwarding parameter, and if the transmission source rejects, invoke the backhaul module. The application programs do not directly communicate with each other, and the communication is carried out through the intermediate forwarding program, namely, the sending source program firstly sends the information stream to the intermediate forwarding program, and the intermediate forwarding program carries out unicast or broadcast transmission on the message to the target receiving program according to the target type and the forwarding type specified by the information stream.
Further, the intermediate forwarding module further comprises a fourth decision module, the fourth decision module decides the forwarding type of the data packet according to the forwarding parameter, if the forwarding type is unicast, the data packet is sent to the application program with the minimum center hop and the center hop not being FF in the receiving source, if the forwarding type is broadcast, the data packet is sent to all the application programs which are online in the receiving source and the center hop not being FF, otherwise, the data transmission is ended. The unicast transmission of the intermediate forwarding program is to send a message to an application program which has the minimum heartbeat and is not the FF of the target application program; the broadcast transmission of the intermediate forwarding program is to send messages to a plurality of applications which are online and not have FF heartbeats.
Further, in the message transmission method supporting unicast and broadcast, the intermediate program processing data is specifically executed according to the following steps:
receiving a heartbeat packet of a sending source, determining the type and the current running state of the sending source, receiving a data packet of the sending source, and performing unpacking analysis on the data packet respectively to obtain forwarding parameters;
judging whether the data meets the specification, if so, forwarding the information, otherwise, returning the data to a source program of a sending source, and informing the sending failure and reason;
the forwarding information firstly judges whether a target program exists or not, if so, judges whether a target application program rejects or not, if so, returns data to a source program of a sending source and informs of sending failure and reasons; if not, judging whether the message is a unicast message or not;
and if the message is a unicast message, sending a data packet to the application program with the minimum heartbeat and the heartbeat not being FF in the receiving source, if the forwarding type is broadcast, sending the data packet to all the application programs which are online in the receiving source and the heartbeat not being FF, and otherwise, finishing data transmission. If it is a broadcast message, data information is transmitted to all applications.
Further, whether the source module code, the destination module code or the command code is larger than 255 is judged, and if so, the source module code, the destination module code or the command code is not in accordance with the specification; whether the routing type is greater than 2 or not, and if so, the routing type is not in accordance with the specification; not within the above two cases.
Furthermore, the message transmission system supporting unicast and broadcast also comprises a memory and a processor; the memory for storing a computer program; the processor is configured to implement a message transmission method supporting unicast and broadcast when executing the computer program.
The message transmission system and the message transmission method supporting unicast and broadcast have the advantages that: the invention sets the sign of whether to receive the information in the heartbeat data sent by the application program to the intermediate program, thereby avoiding the wireless receiving of the broadcast information on the application program of the host computer and only receiving the information of the relevant fields, thereby avoiding the information congestion of the information transmission channel and the congestion of the backbone network, reducing the accumulation of a large amount of useless information on the host computer of the application program and reducing the occupation of the memory. The intermediate forwarding program can realize the distribution of messages and tasks, reduce the communication connection and communication management among all programs and reduce the complexity of communication transmission; the task distribution is managed uniformly, and load balancing can be achieved.
Drawings
FIG. 1 is a flow chart of the intermediate program forwarding information of the present invention;
fig. 2 is an architectural diagram of the present invention.
Detailed Description
The present invention will be described in detail with reference to the drawings and specific embodiments, and it is to be understood that the described embodiments are only a few embodiments of the present invention, rather than the entire embodiments, and that all other embodiments obtained by those skilled in the art based on the embodiments in the present application without inventive work fall within the scope of the present application.
In this embodiment, a message transmission system and a transmission method supporting unicast and broadcast according to the present invention are shown in fig. 1-2, and include an intermediate forwarding module, where the intermediate forwarding module opens a socket with a transmission source in a connection-oriented manner, so as to transmit data of the transmission source to a receiving source; the sending source and the intermediate forwarding module comprise an intermediate forwarding program and a plurality of application programs, and the intermediate forwarding program and the application programs open sockets through a connection-oriented TCP/IP protocol and transmit original data streams through the sockets.
The intermediate forwarding module comprises a connection module for receiving the heartbeat packet of the sending source and determining the type and the current running state of the sending source; the data processing module is used for receiving the data packets of the transmitting source, and respectively carrying out unpacking analysis on the data packets to obtain forwarding parameters; the first judging module is used for judging whether the data packet conforms to the standard or not, if so, the data transmitting module is called, and if not, the return module is called; judging whether the data packet meets the specification or not by judging whether the source module code, the destination module code or the command code is larger than 255 or not, and if so, not meeting the specification; whether the routing type is greater than 2 or not, and if so, the routing type is not in accordance with the specification; not within the above two cases. The data sending module is used for sending the data packet which meets the standard to the receiving source, and the returning module returns the reason why the data can not be sent unsuccessfully to the sending source.
In this embodiment, the intermediate forwarding module further includes a second decision module, where the second decision module is configured to determine whether a data packet meeting a specification is a forwarding message, if so, transmit data to a transmission source according to a forwarding parameter, and if not, end data transmission. The single application program is connected with the intermediate forwarding program at first and continuously sends heartbeat data packets to the intermediate forwarding program. The heartbeat data packet identifies the category and the current running state of the application program, wherein the category is represented by codes in a source module in the heartbeat data packet, the running state is represented by task numbers in the heartbeat data packet, when the task number in the heartbeat data packet is 255, the data is suspended from being received, and other task numbers represent receivable data.
In this embodiment, the intermediate forwarding module further includes a third determining module, where the third determining module is configured to determine whether a transmission source of a data packet that meets a specification and is forwarding information exists, and if the transmission source exists, determine whether the transmission source rejects, if not, transmit data to the transmission source according to the forwarding parameter, and if the transmission source rejects, invoke the backhaul module. The application programs do not directly communicate with each other, and the communication is carried out through the intermediate forwarding program, namely, the sending source program firstly sends the information stream to the intermediate forwarding program, and the intermediate forwarding program carries out unicast or broadcast transmission on the message to the target receiving program according to the target type and the forwarding type specified by the information stream.
In this embodiment, the intermediate forwarding module further includes a fourth determining module, where the fourth determining module determines a forwarding type of the data packet according to the forwarding parameter, and if the forwarding type is unicast, the data packet is sent to an application program with a minimum heartbeat and the heartbeat of which is not FF in the receiving source, and if the forwarding type is broadcast, the data packet is sent to all application programs which are online in the receiving source and the heartbeat of which is not FF, otherwise, data transmission is ended. The unicast transmission of the intermediate forwarding program is to send a message to an application program which has the minimum heartbeat and is not the FF of the target application program; the broadcast transmission of the intermediate forwarding program is to send messages to a plurality of applications which are online and not have FF heartbeats.
In the embodiment, a message transmission method supporting unicast and broadcast receives a heartbeat packet of a sending source, determines the type and the current running state of the sending source, receives a data packet of the sending source, and performs unpacking analysis on the data packet respectively to acquire a forwarding parameter; judging whether the data meets the specification, if so, forwarding the information, otherwise, returning the data to a source program of a sending source, and informing the sending failure and reason; the forwarding information firstly judges whether a target program exists or not, if so, judges whether a target application program rejects or not, if so, returns data to a source program of a sending source and informs of sending failure and reasons; if not, judging whether the message is a unicast message or not;
and if the message is a unicast message, sending a data packet to the application program with the minimum heartbeat and the heartbeat not being FF in the receiving source, if the forwarding type is broadcast, sending the data packet to all the application programs which are online in the receiving source and the heartbeat not being FF, and otherwise, finishing data transmission. If it is a broadcast message, data information is transmitted to all applications.
In this embodiment, the message transmission system supporting unicast and broadcast further includes a memory and a processor; the memory for storing a computer program; the processor is configured to implement a message transmission method supporting unicast and broadcast when executing the computer program.
In this embodiment, the data packet encapsulation format is shown in table 1:
table 1 data packet packaging format
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (10)
1. A message transmission system supporting unicast and broadcast comprises an intermediate forwarding module, wherein a socket is opened between the intermediate forwarding module and a sending source in a connection-oriented mode, so that data of the sending source is transmitted to a receiving source;
the intermediate forwarding module comprises:
the connection module is used for receiving the heartbeat packet of the sending source and determining the type and the current running state of the sending source;
the data processing module is used for receiving the data packets of the transmitting source, and respectively carrying out unpacking analysis on the data packets to obtain forwarding parameters;
the first judging module is used for judging whether the data packet conforms to the standard or not, if so, the data transmitting module is called, and if not, the return module is called;
the data sending module is used for sending the data packet which meets the standard to the receiving source, and the returning module returns the reason why the data can not be sent unsuccessfully to the sending source.
2. The system according to claim 1, further comprising a second determining module, configured to determine whether the data packet meeting the specification is a forwarding message, if so, transmit data to the transmission source according to the forwarding parameter, and if not, end data transmission.
3. The system according to claim 2, further comprising a third determining module, wherein the third determining module is configured to determine whether a transmission source of the data packet that meets the specification and is forwarding information exists, and if the transmission source exists, determine whether the transmission source rejects, if not, transmit data to the transmission source according to the forwarding parameter, and if the transmission source rejects, invoke the backhaul module.
4. The system according to claim 3, further comprising a fourth decision module, wherein the fourth decision module decides the packet forwarding type according to the forwarding parameter, if the forwarding type is unicast, the packet is sent to the application with the smallest heartbeat and the heartbeat not being FF in the receiving source, if the forwarding type is broadcast, the packet is sent to all applications online in the receiving source and the heartbeat not being FF, otherwise, the data transmission is ended.
5. A message transmission method supporting unicast and broadcast is characterized by comprising the following steps:
the method comprises the following steps of opening a socket in a connection-oriented mode, so as to transmit data of a transmitting source to a receiving source, specifically:
receiving a heartbeat packet of a sending source, and determining the type and the current running state of the sending source;
receiving a data packet of a transmitting source, and performing unpacking analysis on the data packet respectively to obtain forwarding parameters;
and judging whether the data packet meets the specification or not, if so, sending the data packet meeting the specification to a receiving source, and if not, returning the reason that the data cannot be sent unsuccessfully to a sending source.
6. The method as claimed in claim 5, wherein after determining that the data packet conforms to the specification, determining whether the data packet is a forwarding message, if so, transmitting data to the transmission source according to the forwarding parameters, and if not, ending the data transmission.
7. The method as claimed in claim 6, wherein after determining that the data packet is a forwarding message, determining whether a transmission source of the data packet exists, if so, determining whether the transmission source rejects, if not, transmitting the data to the transmission source according to the forwarding parameters, and if reject, transmitting a cause that the data cannot be unsuccessfully transmitted back to the transmission source.
8. The method according to claim 7, wherein after determining that the transmission source of the packet exists and the transmission source does not reject, determining the packet forwarding type according to the forwarding parameter, if the forwarding type is unicast, sending the packet to the application with the smallest heartbeat and the heartbeat not being FF, if the forwarding type is broadcast, sending the packet to all applications online in the reception source and the heartbeat not being FF, otherwise, ending the data transmission.
9. The method according to claim 7, wherein the connection-oriented protocol is TCP/IP protocol.
10. An apparatus for supporting unicast and broadcast message transmission, comprising a memory and a processor;
the memory for storing a computer program;
the processor, when executing the computer program, is configured to implement a unicast, broadcast supported message transmission method according to any one of claims 5 to 9.
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