CN114697326B - Method for polygonal communication in edge computing scene - Google Patents
Method for polygonal communication in edge computing scene Download PDFInfo
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- CN114697326B CN114697326B CN202210262148.7A CN202210262148A CN114697326B CN 114697326 B CN114697326 B CN 114697326B CN 202210262148 A CN202210262148 A CN 202210262148A CN 114697326 B CN114697326 B CN 114697326B
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- 238000004891 communication Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 29
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- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 101000652292 Homo sapiens Serotonin N-acetyltransferase Proteins 0.000 description 5
- 102100030547 Serotonin N-acetyltransferase Human genes 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000007175 bidirectional communication Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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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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- 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
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/256—NAT traversal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a polygonal communication method in an edge computing scene, and relates to the technical field of communication in the edge computing scene; the method comprises the steps of respectively establishing tunnels through cloud warehouse registry and each side, obtaining the ip and port information of the terminal nodes endpoint of each side, informing the ip and port information of the terminal nodes endpoint of the corresponding side according to the communication requirements of the side, and communicating the terminal nodes endpoint of the side in a mode of utilizing the outbound request packet and the inbound response packet according to the ip and port information according to a mechanism that the firewall of the side allows the inbound response packet of the outbound request packet to enter.
Description
Technical Field
The invention discloses a method, relates to the technical field of communication in an edge computing scene, and particularly relates to a method for polygonal communication in the edge computing scene.
Background
As the technology in the edge computing field is mature, more and more edge computing scenes begin to appear, in a general scene, all edge nodes are located under respective private networks, all devices in the edge nodes access each other by using private ips, each edge node is configured with one NAT device to access cloud services, the NAT device converts all outgoing traffic in the edge nodes into public ips through SNAT and sends the public ips to the cloud, so that connection is established with the cloud, which is a process of cloud interconnection, but in some scenes, besides cloud interconnection, all edge nodes are required to be mutually opened, and for firewalls of NAT devices, only all outgoing requests are generally allowed, and all incoming requests are forbidden, so that two devices of an edge node network located behind the NAT device cannot pass through the NAT device to realize bidirectional communication.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a polygonal communication method under an edge computing scene, which can enable edge terminal equipment under different private networks to achieve the effect of end-to-end bidirectional communication.
The specific scheme provided by the invention is as follows:
A method for polygonal communication under an edge computing scene includes respectively establishing tunnels with each edge through cloud warehouse registry, obtaining ip and port information of terminal nodes endpoint of each edge, informing the ip and port information of the terminal nodes endpoint of the corresponding edge according to the communication requirement of the edge,
According to a mechanism that the firewall of the side end allows the incoming response packet of the outgoing request packet to enter, the terminal nodes endpoint of the side end communicate with the incoming response packet by utilizing the outgoing request packet and the incoming response packet according to ip and port information.
Further, in the method for polygonal communication in the edge computing scene, the notifying the ip and port information of the endpoint node of the corresponding edge according to the edge communication requirement includes:
and the terminal node endpoint of a certain side initiates a query request to the cloud end, and the ip and port information of the terminal node endpoint of the target side requiring communication are obtained.
Further, in the method for polygonal communication under the edge computing scene, communication is performed between end nodes endpoint of the edge by using an outbound request packet and an inbound response packet according to ip and port information, including:
And recording an outbound request packet sent out according to the ip and port information by using a NAT equipment firewall between end nodes endpoint of the edge, and communicating by receiving an inbound response packet of the outbound request packet.
Further, the method for polygonal communication in the edge computing scene specifically includes the following steps:
The end node end point of a certain side sends out an outbound request packet to the end node end points of other sides according to the ip and port information, the NAT equipment firewall of the certain side records the outbound request packet sent out by the end node end point of the certain side,
The end nodes end points of other side ends send out the outbound request packet to the end node end point of a certain side end according to the ip and port information as the inbound response packet of the outbound request packet sent out by the end node end point of the certain side end, and the outbound request packet sent out by the end node end point of the other side end is recorded by the NAT equipment firewall of the other side end,
And the terminal node end point of one side sends a response data packet to the terminal node end points of the other sides according to the inbound response packet as an inbound response packet of the outbound request packet sent by the terminal node end points of the other sides.
Further, when the communication is performed in the method for polygonal communication in the edge computing scene, a retransmission mechanism is started, so that the outgoing request packet or the incoming response packet is prevented from being lost.
The invention also provides a system for polygonal communication in the edge computing scene, which comprises an information acquisition module and a communication module,
The information acquisition module receives the ip and port information of the terminal node endpoint of the corresponding side, which are informed by the cloud according to the communication requirement of the side, and the ip and port information of the terminal node endpoint of the side are respectively tunneled with each side through a cloud warehouse registry to acquire,
The communication module enables the terminal nodes endpoint of the edge to communicate by utilizing the outbound request packet and the inbound response packet according to the ip and the port information according to a mechanism that the firewall of the edge allows the inbound response packet of the outbound request packet to enter.
Further, the information acquisition module in the system for polygonal communication in the edge computing scene receives ip and port information of a terminal node endpoint of a corresponding edge notified by a cloud according to an edge communication requirement, and the system comprises:
And initiating a query request to the cloud end through a terminal node endpoint of a certain side end, and acquiring the ip and port information of the terminal node endpoint of the target side end requiring communication.
Further, in the system for polygonal communication in the edge computing scenario, the communication module communicates between end nodes endpoint of the edge by using an outbound request packet and an inbound response packet according to ip and port information, and the system includes:
And recording outbound request packets sent out according to the ip and port information by using a NAT equipment firewall between end nodes endpoint of the edge, and communicating by receiving inbound response packets of the outbound request packets.
Further, the specific step of the communication module in the system for polygonal communication in the edge computing scene to enable communication between end nodes endpoint of the edge includes:
Sending out an outbound request packet to the end nodes end points of other end points by the end node end point of a certain end point according to the ip and the port information, recording the outbound request packet sent out by the end node end point of the certain end point by the NAT equipment firewall of the certain end point,
Sending out an outbound request packet to the end node end point of the certain side by the end node end points of the other side according to the ip and port information, recording the outbound request packet sent out by the end node end point of the other side by the NAT equipment firewall of the other side,
And enabling the terminal node end point of the certain side to send a response data packet to the terminal node end points of the other side according to the inbound response packet to serve as the inbound response packet of the outbound request packet sent by the terminal node end points of the other side.
Furthermore, when the communication module in the system for polygonal communication in the edge computing scene is used for communication, a retransmission mechanism is started, so that the outgoing request packet or the incoming response packet is prevented from being lost.
The invention has the advantages that:
The invention provides a polygonal communication method in an edge computing scene, which solves the problem that the edge ends of different private networks in the edge computing scene cannot be directly communicated, and realizes the polygonal communication capacity by means of firewall penetration and cloud registry.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a timing diagram of the application of the method of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
The invention provides a method for polygonal communication in an edge computing scene, which respectively establishes tunnels with each side through a cloud warehouse registry to acquire the ip and port information of the terminal node endpoint of each side and informs the ip and port information of the terminal node endpoint of the corresponding side according to the communication requirements of the side,
According to a mechanism that the firewall of the side end allows the incoming response packet of the outgoing request packet to enter, the terminal nodes endpoint of the side end communicate with the incoming response packet by utilizing the outgoing request packet and the incoming response packet according to ip and port information.
According to the method, the problem that the edge ends in different private networks cannot be directly communicated in an edge computing scene is solved, the cloud end registry is introduced, and each edge end is made to establish a tunnel with the edge end, so that the cloud end registry maintains the end point behind each edge end SNAT, after a request packet is sent to the cloud end registry at the edge end, a firewall at the edge end records the request information, all data packets sent to the end point are allowed to pass through, and other edge ends can realize the two-way communication of each edge end only by inquiring the end point to the cloud end registry and sending the data packets to the end point.
In specific applications, in some embodiments of the method of the present invention, further explaining that the polygonal ends communicate in the edge computing scenario, by the method, devices in private networks of different edge nodes can pass through NAT devices to implement end-to-end direct communication, and reference may be made to fig. 1.
The cloud registry is responsible for acquiring the ip and ports behind each edge SNAT and informing each edge. Firstly, each side communicates with a cloud registry, when the side accesses a public network server after passing through NAT equipment SNAT, the public network ip of the NAT equipment is observed from the server side, and the cloud registry also knows the ip port address behind each side firewall SNAT, the cloud server can inform the corresponding side of the ip and port information of the side with communication requirement,
The side ends with communication requirement mutually acquire the ip: port information used by the other party, the UDP data packets can be started to be mutually sent, the communication is carried out by utilizing the way of sending out the request packet and sending in the response packet, for example, the side end A (3.3.3.3.3) and the side end B (4.4.4.4) send out the first sending out request packet when the communication is carried out, 3.3.3:1234- > 4.4.4:5678, the data packets pass through the firewall of the side end A to enter the public network, the firewall of the side end A records the sending out request, then the firewall of the side end A opens a port to allow all the sending in data packets with the access of 3.3.3.3:1234 to pass through,
The other edge B knows the outbound address 3.3.3:1234 of edge a, edge B also sends out the first outbound request packet, 4.4.4.4:5678- > 3.3.3:1234, the packet passes through the firewall of edge B and reaches the public network, when reaching the side of edge a, the firewall of edge a already has records, edge a's firewall considers the packet as the inbound response packet of the outbound request packet sent by edge a just, thus the packet is released, then edge B sends out the packet to edge a successfully through the firewall of edge a, meanwhile, edge B's firewall also opens an opening to allow the corresponding inbound packet to pass through, then edge a also sends out a packet as a response after receiving edge B's packet, the sent out response packet can also successfully pass through edge B's firewall to edge B after processing is completed, and two successful communication ends can be successfully established by penetrating edge B's firewall, and two successful communication ends can be successfully established. The complete process with reference to fig. 1 is: the method comprises the steps that tunnels are established between an edge A and an edge B and a cloud end registry respectively, so that the cloud end registry records the endpoint information of the edge A and the edge B, the edge A wants to communicate with the edge B, a query request is initiated to the cloud end registry, the cloud end registry returns the endpoint information of the edge B to the edge A, after the edge A obtains the endpoint information of the edge B, a request can be directly initiated to the endpoint of the edge B, and finally the edge A and the edge B successfully complete two-way communication.
Furthermore, when two side ends mutually send UDP data packets, the side ends can start a retransmission mechanism for some important information, so that the situation that some data packets are lost is avoided.
The invention also provides a system for polygonal communication in the edge computing scene, which comprises an information acquisition module and a communication module,
The information acquisition module receives the ip and port information of the terminal node endpoint of the corresponding side, which are informed by the cloud according to the communication requirement of the side, and the ip and port information of the terminal node endpoint of the side are respectively tunneled with each side through a cloud warehouse registry to acquire,
The communication module enables the terminal nodes endpoint of the edge to communicate by utilizing the outbound request packet and the inbound response packet according to the ip and the port information according to a mechanism that the firewall of the edge allows the inbound response packet of the outbound request packet to enter.
The content of information interaction and execution process between the modules in the system is based on the same concept as the method embodiment of the present invention, and specific content can be referred to the description in the method embodiment of the present invention, which is not repeated here.
Likewise, the system solves the problem that the edge ends of different private networks cannot directly communicate in an edge computing scene, and achieves the capability of multilateral communication by means of firewall penetration and cloud registry.
It should be noted that not all the steps and modules in the above processes and the system structures are necessary, and some steps or modules may be omitted according to actual needs. The execution sequence of the steps is not fixed and can be adjusted as required. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or may be implemented jointly by some components in multiple independent devices.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (6)
1. A method for polygonal communication under an edge computing scene is characterized in that tunnels are respectively established through cloud warehouse registry and each edge, the ip and port information of the terminal node endpoint of each edge is obtained, the ip and port information of the terminal node endpoint of the corresponding edge is informed according to the communication requirement of the edge,
According to a mechanism of allowing an incoming response packet of an outgoing request packet to enter by a firewall at an edge, communication is performed between end nodes endpoint at the edge by using the outgoing request packet and the incoming response packet according to ip and port information, including: the method comprises the following specific steps of recording an outbound request packet sent out according to ip and port information by using a NAT device firewall between end nodes of the edge, and communicating by receiving an inbound response packet of the outbound request packet, wherein the specific steps comprise:
The end node end point of a certain side sends out an outbound request packet to the end node end points of other sides according to the ip and port information, the NAT equipment firewall of the certain side records the outbound request packet sent out by the end node end point of the certain side,
The end nodes end points of other side ends send out the outbound request packet to the end node end point of a certain side end according to the ip and port information as the inbound response packet of the outbound request packet sent out by the end node end point of the certain side end, and the outbound request packet sent out by the end node end point of the other side end is recorded by the NAT equipment firewall of the other side end,
And the terminal node end point of one side sends a response data packet to the terminal node end points of the other sides according to the inbound response packet as an inbound response packet of the outbound request packet sent by the terminal node end points of the other sides.
2. The method for communicating multiple edges in an edge computing scenario according to claim 1, wherein said notifying ip and port information of end nodes endpoint of the corresponding edge according to the edge communication requirement comprises:
and the terminal node endpoint of a certain side initiates a query request to the cloud end, and the ip and port information of the terminal node endpoint of the target side requiring communication are obtained.
3. The method for polygonal communication in an edge computing scenario of claim 1, wherein the retransmission mechanism is enabled to avoid missing outgoing request packets or incoming response packets during the communication.
4. A system for polygonal communication in an edge computing scene is characterized by comprising an information acquisition module and a communication module,
The information acquisition module receives the ip and port information of the terminal node endpoint of the corresponding side, which are informed by the cloud according to the communication requirement of the side, and the ip and port information of the terminal node endpoint of the side are respectively tunneled with each side through a cloud warehouse registry to acquire,
The communication module communicates between end nodes endpoint of the edge according to ip and port information by utilizing a mode of the outbound request packet and the inbound response packet according to a mechanism that the firewall of the edge allows the inbound response packet of the outbound request packet to enter, and the communication module comprises the following steps: the communication module enables the end nodes endpoint of the edge to record the outbound request packet sent according to the ip and the port information by utilizing the NAT equipment firewall, and communicates by receiving the inbound response packet of the outbound request packet,
The specific steps of the communication module for communicating between the end nodes of the edge end comprise:
Sending out an outbound request packet to the end nodes end points of other end points by the end node end point of a certain end point according to the ip and the port information, recording the outbound request packet sent out by the end node end point of the certain end point by the NAT equipment firewall of the certain end point,
Sending out an outbound request packet to the end node end point of the certain side by the end node end points of the other side according to the ip and port information, recording the outbound request packet sent out by the end node end point of the other side by the NAT equipment firewall of the other side,
And enabling the terminal node end point of the certain side to send a response data packet to the terminal node end points of the other side according to the inbound response packet to serve as the inbound response packet of the outbound request packet sent by the terminal node end points of the other side.
5. The system for polygonal communication in an edge computing scenario according to claim 4, wherein the information obtaining module receives ip and port information of a terminal node endpoint of a corresponding edge notified by a cloud according to an edge communication requirement, and the system comprises:
And initiating a query request to the cloud end through a terminal node endpoint of a certain side end, and acquiring the ip and port information of the terminal node endpoint of the target side end requiring communication.
6. The system for communicating in multiple sides in an edge computing scenario of claim 4 wherein the communication module enables a retransmission mechanism to avoid losing outgoing request packets or incoming response packets when communicating.
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