CN110493134B - Method and device for obtaining public network address - Google Patents
Method and device for obtaining public network address Download PDFInfo
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- CN110493134B CN110493134B CN201810464251.3A CN201810464251A CN110493134B CN 110493134 B CN110493134 B CN 110493134B CN 201810464251 A CN201810464251 A CN 201810464251A CN 110493134 B CN110493134 B CN 110493134B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
Abstract
The embodiment of the invention provides a public network address acquisition method, which is applied to a video network, wherein the video network comprises a video network terminal, a video network server and a video network router, the video network router is provided with a corresponding external network address, and the method comprises the following steps: the video network terminal respectively acquires corresponding video network router lists from a video network server according to a preset number of external network addresses; the video networking terminal respectively sends a route tracking data packet to each video networking router; the video network terminal respectively receives the IP addresses returned by the video network router and judges whether the IP addresses are public network IP addresses or not; if the IP address is a public network IP address, discarding the Traceroute data packet, otherwise, continuously forwarding the Traceroute data packet to the next video network router in the video network router list. The demand of automatically, directly and effectively acquiring the IP address of the public network of the Internet when the video network is connected with the Internet is met.
Description
Technical Field
The present invention relates to the field of video networking technologies, and in particular, to a method and an apparatus for obtaining a public network address.
Background
With the rapid development of network technologies, bidirectional communication such as video conferences and video teaching is widely popularized in the aspects of life, work, learning and the like of users, and plays an active role in life and work application.
In the process of realizing the service through the video networking, the video networking terminal is often required to be connected with the internet, and because the video networking follows specific communication standards, protocols and addresses to carry out intranet communication, when the video networking is to be converted into an extranet to carry out communication, a public network address of the extranet needs to be acquired first, and then access is carried out according to the specific address of the extranet and the communication protocol of the extranet.
Disclosure of Invention
In view of the above problems, embodiments of the present invention are proposed to provide a public network address obtaining method and a corresponding public network address obtaining apparatus that overcome or at least partially solve the above problems.
In order to solve the above problems, an embodiment of the present invention discloses a method for acquiring a public network address, where the video network includes a video network terminal, a video network server, and a video network router, and the video network router has a corresponding external network address, and the method includes: the video network terminal respectively acquires each video network router list corresponding to each external network address from a video network server according to a preset number of external network addresses; the video network terminal respectively sends a route tracking Traceroute data packet to each corresponding video network router in each video network router list; the video network terminal respectively receives the IP addresses returned by the video network router aiming at the route tracking Traceroute data packets; the video network terminal judges whether the IP address is a public network IP address; and if the IP address is a public network IP address, discarding the Traceroute data packet, otherwise, continuously forwarding the Traceroute data packet to a corresponding next video network router in the video network router list.
The embodiment of the invention also discloses a public network address acquisition device, the video network comprises a video network terminal, a video network server and a video network router, the video network router has a corresponding external network address, and the device comprises: the router list acquisition module is used for the video network terminal to respectively acquire each video network router list corresponding to each external network address from a video network server according to the preset number of external network addresses; a Traceroute data packet sending module, configured to send, by the video networking terminal, a route tracking Traceroute data packet to each video networking router corresponding to each video networking router in each video networking router list; the IP address receiving module is used for the video network terminal to respectively receive the IP addresses returned by the video network router aiming at the route tracking Traceroute data packets; the public network IP address judging module is used for judging whether the IP address is a public network IP address or not by the video network terminal; and the execution module is used for discarding the Traceroute data packet if the IP address is a public network IP address, and otherwise, continuously forwarding the Traceroute data packet to a corresponding next video networking router in the video networking router list.
The embodiment of the invention has the following advantages:
in the embodiment of the invention, the video network terminal respectively acquires each video network router list corresponding to each external network address from a video network server according to the preset number of external network addresses; the video network terminal respectively sends a route tracking Traceroute data packet to each corresponding video network router in each video network router list; the video network terminal respectively receives the IP addresses returned by the video network router aiming at the route tracking Traceroute data packets; the video network terminal judges whether the IP address is a public network IP address; and if the IP address is a public network IP address, discarding the Traceroute data packet, otherwise, continuously forwarding the Traceroute data packet to a corresponding next video network router in the video network router list. The demand of automatically, directly and effectively acquiring the IP address of the public network of the Internet when the video network is connected with the Internet is met.
Drawings
FIG. 1 is a schematic networking diagram of a video network of the present invention;
FIG. 2 is a schematic diagram of a hardware architecture of a node server according to the present invention;
fig. 3 is a schematic diagram of a hardware structure of an access switch of the present invention;
fig. 4 is a schematic diagram of a hardware structure of an ethernet protocol conversion gateway according to the present invention;
FIG. 5 is a flowchart illustrating steps of a method for obtaining a public network address according to an embodiment of the present invention;
fig. 6 is a block diagram of a public network address obtaining apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The video networking is an important milestone for network development, is a real-time network, can realize high-definition video real-time transmission, and pushes a plurality of internet applications to high-definition video, and high-definition faces each other.
The video networking adopts a real-time high-definition video exchange technology, can integrate required services such as dozens of services of video, voice, pictures, characters, communication, data and the like on a system platform on a network platform, such as high-definition video conference, video monitoring, intelligent monitoring analysis, emergency command, digital broadcast television, delayed television, network teaching, live broadcast, VOD on demand, television mail, Personal Video Recorder (PVR), intranet (self-office) channels, intelligent video broadcast control, information distribution and the like, and realizes high-definition quality video broadcast through a television or a computer.
Wherein, the traceroute principle is as follows:
the Traceroute program is designed using the TTL (time To live) fields (fields) of ICMP and IP header. First, traceroute sends out an IP datagram with TTL of 1 (actually, each time 3 packets of 40 bytes are sent out, including source address, destination address and time stamp of packet origination) to the destination, and when the first router (router) on the path receives this datagram, it decrements the TTL by 1. At this time, TTL becomes 0, so the router will drop the datagram and send back an "ICMP time exceeded" message (including the source address of the sending IP packet, all contents of the IP packet and the IP address of the router), after receiving this message, the traceroute knows that this router exists on this path, and then sends out another datagram whose TTL is 2, finds the 2 nd router, and so on, the traceroute adds 1 to the TTL of the sent datagram to find another router each time, and this repeated action continues until a certain datagram arrives at the destination (it does not need to arrive at the destination in the public network IP, so it stops to acquire the public network IP).
To better understand the embodiments of the present invention, the following description refers to the internet of view:
some of the technologies applied in the video networking are as follows:
network Technology (Network Technology)
Network technology innovation in video networking has improved over traditional Ethernet (Ethernet) to face the potentially enormous video traffic on the network. Unlike pure network Packet Switching (Packet Switching) or network Circuit Switching (Circuit Switching), the Packet Switching is adopted by the technology of the video networking to meet the Streaming requirement. The video networking technology has the advantages of flexibility, simplicity and low price of packet switching, and simultaneously has the quality and safety guarantee of circuit switching, thereby realizing the seamless connection of the whole network switching type virtual circuit and the data format.
Switching Technology (Switching Technology)
The video network adopts two advantages of asynchronism and packet switching of the Ethernet, eliminates the defects of the Ethernet on the premise of full compatibility, has end-to-end seamless connection of the whole network, is directly communicated with a user terminal, and directly bears an IP data packet. The user data does not require any format conversion across the entire network. The video networking is a higher-level form of the Ethernet, is a real-time exchange platform, can realize the real-time transmission of the whole-network large-scale high-definition video which cannot be realized by the existing Internet, and pushes a plurality of network video applications to high-definition and unification.
Server Technology (Server Technology)
The server technology on the video networking and unified video platform is different from the traditional server, the streaming media transmission of the video networking and unified video platform is established on the basis of connection orientation, the data processing capacity of the video networking and unified video platform is independent of flow and communication time, and a single network layer can contain signaling and data transmission. For voice and video services, the complexity of video networking and unified video platform streaming media processing is much simpler than that of data processing, and the efficiency is greatly improved by more than one hundred times compared with that of a traditional server.
Storage Technology (Storage Technology)
The super-high speed storage technology of the unified video platform adopts the most advanced real-time operating system in order to adapt to the media content with super-large capacity and super-large flow, the program information in the server instruction is mapped to the specific hard disk space, the media content is not passed through the server any more, and is directly sent to the user terminal instantly, and the general waiting time of the user is less than 0.2 second. The optimized sector distribution greatly reduces the mechanical motion of the magnetic head track seeking of the hard disk, the resource consumption only accounts for 20% of that of the IP internet of the same grade, but concurrent flow which is 3 times larger than that of the traditional hard disk array is generated, and the comprehensive efficiency is improved by more than 10 times.
Network Security Technology (Network Security Technology)
The structural design of the video network completely eliminates the network security problem troubling the internet structurally by the modes of independent service permission control each time, complete isolation of equipment and user data and the like, generally does not need antivirus programs and firewalls, avoids the attack of hackers and viruses, and provides a structural carefree security network for users.
Service Innovation Technology (Service Innovation Technology)
The unified video platform integrates services and transmission, and is not only automatically connected once whether a single user, a private network user or a network aggregate. The user terminal, the set-top box or the PC are directly connected to the unified video platform to obtain various multimedia video services in various forms. The unified video platform adopts a menu type configuration table mode to replace the traditional complex application programming, can realize complex application by using very few codes, and realizes infinite new service innovation.
Networking of the video network is as follows:
the video network is a centralized control network structure, and the network can be a tree network, a star network, a ring network and the like, but on the basis of the centralized control node, the whole network is controlled by the centralized control node in the network.
As shown in fig. 1, the video network is divided into an access network and a metropolitan network.
The devices of the access network part can be mainly classified into 3 types: node server, access switch, terminal (including various set-top boxes, coding boards, memories, etc.). The node server is connected to an access switch, which may be connected to a plurality of terminals and may be connected to an ethernet network.
The node server is a node which plays a centralized control function in the access network and can control the access switch and the terminal. The node server can be directly connected with the access switch or directly connected with the terminal.
Similarly, devices of the metropolitan network portion may also be classified into 3 types: a metropolitan area server, a node switch and a node server. The metro server is connected to a node switch, which may be connected to a plurality of node servers.
The node server is a node server of the access network part, namely the node server belongs to both the access network part and the metropolitan area network part.
The metropolitan area server is a node which plays a centralized control function in the metropolitan area network and can control a node switch and a node server. The metropolitan area server can be directly connected with the node switch or directly connected with the node server.
Therefore, the whole video network is a network structure with layered centralized control, and the network controlled by the node server and the metropolitan area server can be in various structures such as tree, star and ring.
The access network part can form a unified video platform (the part in the dotted circle), and a plurality of unified video platforms can form a video network; each unified video platform may be interconnected via metropolitan area and wide area video networking.
Video networking device classification
1.1 devices in the video network of the embodiment of the present invention can be mainly classified into 3 types: servers, switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.). The video network as a whole can be divided into a metropolitan area network (or national network, global network, etc.) and an access network.
1.2 wherein the devices of the access network part can be mainly classified into 3 types: node servers, access switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.).
The specific hardware structure of each access network device is as follows:
a node server:
as shown in fig. 2, the system mainly includes a network interface module 201, a switching engine module 202, a CPU module 203, and a disk array module 204;
the network interface module 201, the CPU module 203, and the disk array module 204 all enter the switching engine module 202; the switching engine module 202 performs an operation of looking up the address table 205 on the incoming packet, thereby obtaining the direction information of the packet; and stores the packet in a queue of the corresponding packet buffer 206 based on the packet's steering information; if the queue of the packet buffer 206 is nearly full, it is discarded; the switching engine module 202 polls all packet buffer queues for forwarding if the following conditions are met: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero. The disk array module 204 mainly implements control over the hard disk, including initialization, read-write, and other operations on the hard disk; the CPU module 203 is mainly responsible for protocol processing with an access switch and a terminal (not shown in the figure), configuring an address table 205 (including a downlink protocol packet address table, an uplink protocol packet address table, and a data packet address table), and configuring the disk array module 204.
The access switch:
as shown in fig. 3, the network interface module mainly includes a network interface module (a downlink network interface module 301 and an uplink network interface module 302), a switching engine module 303 and a CPU module 304;
wherein, the packet (uplink data) coming from the downlink network interface module 301 enters the packet detection module 305; the packet detection module 305 detects whether the Destination Address (DA), the Source Address (SA), the packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id) and enters the switching engine module 303, otherwise, discards the stream identifier; the packet (downstream data) coming from the upstream network interface module 302 enters the switching engine module 303; the data packet coming from the CPU module 204 enters the switching engine module 303; the switching engine module 303 performs an operation of looking up the address table 306 on the incoming packet, thereby obtaining the direction information of the packet; if the packet entering the switching engine module 303 is from the downstream network interface to the upstream network interface, the packet is stored in the queue of the corresponding packet buffer 307 in association with the stream-id; if the queue of the packet buffer 307 is nearly full, it is discarded; if the packet entering the switching engine module 303 is not from the downlink network interface to the uplink network interface, the data packet is stored in the queue of the corresponding packet buffer 307 according to the guiding information of the packet; if the queue of the packet buffer 307 is nearly full, it is discarded.
The switching engine module 303 polls all packet buffer queues, which in this embodiment of the present invention is divided into two cases:
if the queue is from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queued packet counter is greater than zero; 3) obtaining a token generated by a code rate control module;
if the queue is not from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero.
The rate control module 208 is configured by the CPU module 204, and generates tokens for packet buffer queues from all downstream network interfaces to upstream network interfaces at programmable intervals to control the rate of upstream forwarding.
The CPU module 304 is mainly responsible for protocol processing with the node server, configuration of the address table 306, and configuration of the code rate control module 308.
Ethernet protocol conversion gateway：
As shown in fig. 4, the apparatus mainly includes a network interface module (a downlink network interface module 401 and an uplink network interface module 402), a switching engine module 403, a CPU module 404, a packet detection module 405, a rate control module 408, an address table 406, a packet buffer 407, a MAC adding module 409, and a MAC deleting module 410.
Wherein, the data packet coming from the downlink network interface module 401 enters the packet detection module 405; the packet detection module 405 detects whether the ethernet MAC DA, the ethernet MAC SA, the ethernet length or frame type, the video network destination address DA, the video network source address SA, the video network packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id); then, the MAC deletion module 410 subtracts MAC DA, MAC SA, length or frame type (2byte) and enters the corresponding receiving buffer, otherwise, discards it;
the downlink network interface module 401 detects the sending buffer of the port, and if there is a packet, obtains the ethernet MAC DA of the corresponding terminal according to the destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MAC SA of the ethernet protocol gateway, and the ethernet length or frame type, and sends the packet.
The other modules in the ethernet protocol gateway function similarly to the access switch.
A terminal:
the system mainly comprises a network interface module, a service processing module and a CPU module; for example, the set-top box mainly comprises a network interface module, a video and audio coding and decoding engine module and a CPU module; the coding board mainly comprises a network interface module, a video and audio coding engine module and a CPU module; the memory mainly comprises a network interface module, a CPU module and a disk array module.
1.3 devices of the metropolitan area network part can be mainly classified into 2 types: node server, node exchanger, metropolitan area server. The node switch mainly comprises a network interface module, a switching engine module and a CPU module; the metropolitan area server mainly comprises a network interface module, a switching engine module and a CPU module.
2. Video networking packet definition
2.1 Access network packet definition
The data packet of the access network mainly comprises the following parts: destination Address (DA), Source Address (SA), reserved bytes, payload (pdu), CRC.
As shown in the following table, the data packet of the access network mainly includes the following parts:
| DA | SA | Reserved | Payload | CRC |
wherein:
the Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (such as various protocol packets, multicast data packets, unicast data packets, etc.), there are 256 possibilities at most, the second byte to the sixth byte are metropolitan area network addresses, and the seventh byte and the eighth byte are access network addresses;
the Source Address (SA) is also composed of 8 bytes (byte), defined as the same as the Destination Address (DA);
the reserved byte consists of 2 bytes;
the payload part has different lengths according to different types of datagrams, and is 64 bytes if the datagram is various types of protocol packets, and is 32+1024 or 1056 bytes if the datagram is a unicast packet, of course, the length is not limited to the above 2 types;
the CRC consists of 4 bytes and is calculated in accordance with the standard ethernet CRC algorithm.
2.2 metropolitan area network packet definition
The topology of a metropolitan area network is a graph and there may be 2, or even more than 2, connections between two devices, i.e., there may be more than 2 connections between a node switch and a node server, a node switch and a node switch, and a node switch and a node server. However, the metro network address of the metro network device is unique, and in order to accurately describe the connection relationship between the metro network devices, parameters are introduced in the embodiment of the present invention: a label to uniquely describe a metropolitan area network device.
In this specification, the definition of the Label is similar to that of the Label of MPLS (Multi-Protocol Label Switch), and assuming that there are two connections between the device a and the device B, there are 2 labels for the packet from the device a to the device B, and 2 labels for the packet from the device B to the device a. The label is classified into an incoming label and an outgoing label, and assuming that the label (incoming label) of the packet entering the device a is 0x0000, the label (outgoing label) of the packet leaving the device a may become 0x 0001. The network access process of the metro network is a network access process under centralized control, that is, address allocation and label allocation of the metro network are both dominated by the metro server, and the node switch and the node server are both passively executed, which is different from label allocation of MPLS, and label allocation of MPLS is a result of mutual negotiation between the switch and the server.
As shown in the following table, the data packet of the metro network mainly includes the following parts:
| DA | SA | Reserved | label (R) | Payload | CRC |
Namely Destination Address (DA), Source Address (SA), Reserved byte (Reserved), tag, payload (pdu), CRC. The format of the tag may be defined by reference to the following: the tag is 32 bits with the upper 16 bits reserved and only the lower 16 bits used, and its position is between the reserved bytes and payload of the packet.
Based on the characteristics of the video networking, one of the core concepts of the embodiment of the invention is provided, a public network address acquisition server of a local terminal receives an emergency command request sent by a video networking terminal, the public network address acquisition server sorts accident information according to the accident grading information, the emergency command request is sent to a web server according to a sorting result, and then the web server sends the emergency command request to the video networking server, so that the purpose of performing emergency command video connection between the public network address acquisition terminal and the video networking terminal is realized.
Referring to fig. 5, a flowchart illustrating steps of an embodiment of a public network address obtaining method according to the present invention is shown, where the method is applied to a video network, where the video network includes a video network terminal, a video network server, and a video network router, and the video network router has a corresponding external network address, and specifically includes the following steps:
In the embodiment of the invention, when the video network terminal is used for accessing the external network, the corresponding external network destination IP address is input in the video network terminal, the video network terminal sends a request for obtaining the routing list to the video network server according to the external network address, and after the video network server receives the request, the corresponding router list is returned according to the external network address.
For example, when four destination IP addresses of the external network are input in the terminal of the video network, the IP addresses are encapsulated in the request packet, and sent to the server of the video network, and the server returns a router list corresponding to each IP address according to the four IP addresses, where the number of the IP addresses is a threshold value obtained by a relevant technician according to a test, and the four IP addresses are usually selected, that is, the public IP address can be obtained.
In the embodiment of the invention, after the video network terminal receives the router list returned by the video network server, the route tracking Traceroute data packets are respectively sent to the corresponding routers. According To a route tracking Traceroute mechanism, the data packet is an IP datagram containing a source address, a destination address, a sending time label and time To live (TTL To live) information, when a first router in a route list receives the datagram, the TTL is automatically reduced by 1, and the like, if the router receiving the data packet detects that the TTL is 0, the datagram is discarded, and an ICMP timeout (ICMP time exceeded) message is returned, wherein the message comprises the source address of the IP packet, all contents of the IP packet and the IP address of the router.
Preferably, step 502, comprises: substeps A1-A2;
substep a1, creating a UDP sending port and an ICMP receiving port at the terminal of the video network.
In the embodiment of the invention, because the communication is connectionless during UDP communication and the transmission is completed, the Traceroute data packet is transmitted through the protocol, and because each router returns an ICMP time exceeded message according to the Traceroute data packet, an ICMP receiving port of an internetwork control message protocol is also required to be established at the video networking terminal, wherein, the UDP transmission port number and the ICMP receiving port number bound by the socket can be utilized.
Substep a2, the terminal of the video network sends Traceroute data packets to the routers in the router list of the video network corresponding to the external network addresses through the UDP sending port; the Traceroute data packet comprises a preset life cycle TTL of the Traceroute data packet and a route IP acquisition request containing preset request times.
In the embodiment of the present invention, a terminal of a video network sends a routing tracking Traceroute data packet through a UDP sending port, where the data packet is an IP datagram including a source address, a destination address, a sending time tag, and TTL (time To live) information, and includes an acquisition request of an IP address of a router, and the number of requests is usually 3, that is, after the router receives the Traceroute data packet, the TTL automatically decreases by 1, and receives a router IP address request 3 times and returns a routing IP address, and of course, in practical applications, the router does not normally return the routing IP address every time the router receives the IP address request, and the 3 IP requests are set by related technical personnel To increase the probability of normally acquiring the IP address, and the number of requests can be adjusted according To specific requirements.
In the embodiment of the invention, when a Traceroute data packet arrives at a router, and the TTL is 0, an ICMP overtime (ICMP time exceeded) message is returned to the video network terminal, wherein the message comprises the source address of the IP packet, all contents of the IP packet and the IP address of the router.
Preferably, step 503 comprises: sub-step B1;
and a substep B1, wherein the video networking terminal receives the IP addresses returned by the video networking routers respectively through an Internet control message protocol ICMP receiving port, and the IP addresses are obtained by the routing IP acquisition requests in the routing tracking Traceroute data packets.
In the embodiment of the invention, the video networking terminal receives an ICMP overtime (ICMP time exceeded) message returned by the router through an ICMP receiving port, and acquires the corresponding router and the IP address thereof according to the source address of the IP packet, all contents of the IP packet and the IP address of the router contained in the message.
Preferably, the sub-step B1, comprises: sub-step B11;
and a substep B11, if the video networking terminal receives the IP address returned by each video networking router for the route IP acquisition request with the preset request frequency within a preset time and a preset life cycle TTL of the Traceroute data packet through a receiving port of the ICMP protocol, respectively, then step 504 is entered, otherwise step 502 is entered.
In the embodiment of the invention, after the video network terminal receives the router IP address, whether the IP address is a public network IP address is judged, however, if the IP address returned by any router is not successfully acquired in the preset life cycle TTL of the Traceroute data packet and the preset cycle in the video network terminal, the Traceroute is considered to be failed, and the step 502 is re-entered.
In the embodiment of the invention, because the IP address is formulated according to the international IP address setting rule, the public network address has certain characteristics, for example, the public network IP address is mainly divided into the following categories, A category: 1.0.0.0 to 127.255.255.255 are large networks that are primarily allocated to a large number of hosts and have a small number of local area networks; b type: 128.0.0.0 to 191.255.255.255 are commonly used in large international corporations and government agencies; class C: 192.0.0.0 to 223.255.255.255 for general small-company campus network research institutions, etc.; and D type: 224.0.0.0 to 239.255.255.255 for special use, also known as broadcast address; and E type: 240.0.0 to 255.255.255.255 are temporarily reserved. According to the IP address setting range, whether the obtained routing IP address is the public network IP can be known.
And 505, if the IP address is a public network IP address, discarding the Traceroute data packet, otherwise, continuously forwarding the Traceroute data packet to a corresponding next video network router in the video network router list.
In the embodiment of the invention, if the received routing address is determined to be the public network address, the Traceroute is stopped, and the forwarded Traceroute data packet is discarded. If the received routing IP address is judged not to be the public network IP address through the method, the next corresponding router in the same order is selected according to the router list obtained from the video network server, the Traceroute data packet is forwarded to the router, and the corresponding TTL is automatically reduced by 1.
Preferably, after step 505, the method further comprises:
step D1, if the IP address returned by the routing tracking Traceroute router for the routing tracking Traceroute data packet is not received after the routing tracking Traceroute data packet traverses the routers in the routing tracking Traceroute router list, entering the step that the routing tracking Traceroute data packet is sent to each corresponding routing router in each routing tracking router list by the video networking terminal.
In the embodiment of the invention, when the Traceroute data packet is within the step number defined by the TTL or after all routers in the router list are traversed and no routing IP address is returned, the Traceroute is considered to be failed and the step 502 is re-entered.
In the embodiment of the invention, the video network terminal respectively acquires each video network router list corresponding to each external network address from a video network server according to the preset number of external network addresses; the video network terminal respectively sends a route tracking Traceroute data packet to each corresponding video network router in each video network router list; the video network terminal respectively receives the IP addresses returned by the video network router aiming at the route tracking Traceroute data packets; the video network terminal judges whether the IP address is a public network IP address; and if the IP address is a public network IP address, discarding the Traceroute data packet, otherwise, continuously forwarding the Traceroute data packet to a corresponding next video network router in the video network router list. The demand of automatically, directly and effectively acquiring the IP address of the public network of the Internet when the video network is connected with the Internet is met.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 6, a block diagram of a public network address obtaining apparatus according to an embodiment of the present invention is shown, where the apparatus is applied to a video network, where the video network includes a video network terminal, a video network server, and a video network router, and the video network router has a corresponding external network address, and may specifically include the following modules:
a router list obtaining module 601, configured to respectively obtain, by the video networking terminal, each video networking router list corresponding to each external network address from a video networking server according to a preset number of external network addresses;
a Traceroute data packet sending module 602, configured to send, by the video networking terminal, a route tracking Traceroute data packet to each video networking router corresponding to each video networking router in each video networking router list;
preferably, the Traceroute packet sending module 602 includes:
the port establishing submodule is used for establishing a User Datagram Protocol (UDP) sending port and an Internetwork Control Message Protocol (ICMP) receiving port at the video network terminal;
a Traceroute data packet sending submodule, configured to send a Traceroute data packet to a router in each video networking router list corresponding to each external network address through the UDP sending port by the video networking terminal; the Traceroute data packet comprises a preset life cycle TTL of the Traceroute data packet and a route IP acquisition request containing preset request times.
An IP address receiving module 603, configured to respectively receive, by the video networking terminal, IP addresses returned by the video networking router for the route tracking Traceroute data packet;
preferably, the IP address receiving module 603 includes:
and the IP address receiving submodule is used for the video network terminal to respectively receive each video network router through an internet control message protocol ICMP receiving port and obtain the IP address returned by the request aiming at the route IP in the route tracking Traceroute data packet.
Preferably, the IP address receiving submodule includes:
and the IP address receiving unit is used for executing the public network IP address judging module if the video networking terminal receives the IP addresses returned by the video networking routers according to the route IP acquisition requests with the preset request times in the preset time and the preset life cycle TTL of the Traceroute data packet through a receiving port of an ICMP protocol, or executing the Traceroute data packet sending module.
A public network IP address judging module 604, configured to judge, by the video network terminal, whether the IP address is a public network IP address;
an executing module 605, configured to discard the Traceroute data packet if the IP address is a public IP address, and otherwise, continue to forward the Traceroute data packet to a next corresponding router in the list of routers in the network of views.
Preferably, the method further comprises the following steps:
and the repeated execution module is used for executing the Traceroute data packet sending module if the video networking terminal does not receive the IP address returned by the video networking router aiming at the route tracking Traceroute data packet after the route tracking Traceroute data packet traverses the routers in the video networking router list.
In the embodiment of the invention, the router list acquisition module is used for the video network terminal to respectively acquire each video network router list corresponding to each external network address from the video network server according to the preset number of external network addresses; a Traceroute data packet sending module, configured to send, by the video networking terminal, a route tracking Traceroute data packet to each video networking router corresponding to each video networking router in each video networking router list; the IP address receiving module is used for the video network terminal to respectively receive the IP addresses returned by the video network router aiming at the route tracking Traceroute data packets; the public network IP address judging module is used for judging whether the IP address is a public network IP address or not by the video network terminal; and finally, an execution module is used for discarding the Traceroute data packet if the IP address is a public network IP address, and otherwise, continuously forwarding the Traceroute data packet to a corresponding next video network router in the video network router list. The demand of automatically, directly and effectively acquiring the IP address of the public network of the Internet when the video network is connected with the Internet is met.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above detailed description is made on a method and a device for acquiring a public network address provided by the present invention, and a specific example is applied in the present document to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. A public network address acquisition method is applied to a video network, the video network comprises a video network terminal, a video network server and a video network router, the video network router has a corresponding external network address, and the method comprises the following steps:
the video network terminal respectively acquires each video network router list corresponding to each external network address from a video network server according to a preset number of external network addresses;
the video network terminal respectively sends a route tracking Traceroute data packet to each corresponding video network router in each video network router list, and the route tracking Traceroute data packet comprises the following steps:
creating a User Datagram Protocol (UDP) sending port and an Internetwork Control Message Protocol (ICMP) receiving port at the video network terminal;
the video network terminal sends Traceroute data packets to routers in each video network router list corresponding to each external network address through the UDP sending port; the Traceroute data packet comprises a preset life cycle TTL of the Traceroute data packet and a route IP acquisition request containing preset request times;
the video network terminal respectively receives the IP addresses returned by the video network router aiming at the route tracking Traceroute data packets;
the video network terminal judges whether the IP address is a public network IP address;
and if the IP address is a public network IP address, discarding the Traceroute data packet, otherwise, continuously forwarding the Traceroute data packet to a corresponding next video network router in the video network router list.
2. The method according to claim 1, wherein the step of receiving, by the network-of-sight terminals, the IP addresses returned by the network-of-sight routers for the route tracing Traceroute packets respectively comprises:
and the video network terminal respectively receives the video network routers through an internet control message protocol ICMP receiving port and acquires the IP address returned by the request aiming at the route IP in the route tracking Traceroute data packet.
3. The method according to claim 2, wherein the step of the terminal of the video network receiving each video network router through an ICMP receiving port, and tracking an IP address returned by a route IP acquisition request in the Traceroute packet for the route includes:
if the video network terminal receives the IP address returned by the video network router aiming at the route IP acquisition request with the preset request frequency in the preset time and the preset life cycle TTL of the Traceroute data packet through a receiving port of the ICMP protocol, the step that the video network terminal judges whether the IP address is a public network IP address is carried out, otherwise, the step that the video network terminal sends a route tracking Traceroute data packet to each corresponding video network router in each video network router list is carried out.
4. The method of claim 1, further comprising:
and if the IP address returned by the routing tracking Traceroute router for the routing tracking Traceroute data packet is not received after the routing tracking Traceroute data packet traverses the routers in the routing tracking Traceroute router list, entering a step that the routing tracking Traceroute data packet is sent to each corresponding routing router in each routing tracking router list by the video networking terminal.
5. The utility model provides a public network address acquisition device, its characterized in that, the device is applied to the video networking, the video networking includes video networking terminal, video networking server, video networking router, the video networking router has corresponding extranet address, the device include:
the router list acquisition module is used for the video network terminal to respectively acquire each video network router list corresponding to each external network address from a video network server according to the preset number of external network addresses;
a Traceroute data packet sending module, configured to send, by the video networking terminal, a route tracking Traceroute data packet to each video networking router corresponding to each video networking router list, respectively, where the route tracking Traceroute data packet sending module includes:
the port establishing submodule is used for establishing a User Datagram Protocol (UDP) sending port and an Internetwork Control Message Protocol (ICMP) receiving port at the video network terminal;
a Traceroute data packet sending submodule, configured to send a Traceroute data packet to a router in each video networking router list corresponding to each external network address through the UDP sending port by the video networking terminal; the Traceroute data packet comprises a preset life cycle TTL of the Traceroute data packet and a route IP acquisition request containing preset request times;
the IP address receiving module is used for the video network terminal to respectively receive the IP addresses returned by the video network router aiming at the route tracking Traceroute data packets;
the public network IP address judging module is used for judging whether the IP address is a public network IP address or not by the video network terminal;
and the execution module is used for discarding the Traceroute data packet if the IP address is a public network IP address, and otherwise, continuously forwarding the Traceroute data packet to a corresponding next video networking router in the video networking router list.
6. The apparatus of claim 5, wherein the IP address receiving module comprises:
and the IP address receiving submodule is used for the video network terminal to respectively receive each video network router through an internet control message protocol ICMP receiving port and obtain the IP address returned by the request aiming at the route IP in the route tracking Traceroute data packet.
7. The apparatus of claim 6, wherein the IP address receiving submodule comprises:
and the IP address receiving unit is used for executing the public network IP address judging module if the video networking terminal receives the IP addresses returned by the video networking routers according to the route IP acquisition requests with the preset request times in the preset time and the preset life cycle TTL of the Traceroute data packet through a receiving port of an ICMP protocol, or executing the Traceroute data packet sending module.
8. The apparatus of claim 5, further comprising:
and the repeated execution module is used for executing the Traceroute data packet sending module if the video networking terminal does not receive the IP address returned by the video networking router aiming at the route tracking Traceroute data packet after the route tracking Traceroute data packet traverses the routers in the video networking router list.
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