CN113301060B - Data transmission method, device, server and storage medium - Google Patents

Data transmission method, device, server and storage medium Download PDF

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Publication number
CN113301060B
CN113301060B CN202010106670.7A CN202010106670A CN113301060B CN 113301060 B CN113301060 B CN 113301060B CN 202010106670 A CN202010106670 A CN 202010106670A CN 113301060 B CN113301060 B CN 113301060B
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server
image collector
source identifier
data
target
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CN113301060A (en
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郝明珠
顾武强
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Zhejiang Uniview Technologies Co Ltd
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Zhejiang Uniview Technologies Co Ltd
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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
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources

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  • Computer Networks & Wireless Communication (AREA)
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  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The embodiment of the invention discloses a data transmission method, a data transmission device, a server and a storage medium. The method is applied to a first server in a first local area network and comprises the following steps: responding to a data acquisition request sent by a second server in a second local area network, and generating a target data source identifier; sending a confirmation request carrying a target data source identifier to at least one image collector to determine the target image collector for the target data source identifier; and sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network through a second server, so that the media forwarding server determines the identification information of the target image collector which sends the data according to the target data source identifier carried in the received data. The scheme solves the problem that the data sent by different image collectors needs to be received by different ports to judge the sender, and realizes that the identification information of the image collector for sending the data is determined for the data received by one port.

Description

Data transmission method, device, server and storage medium
Technical Field
The embodiment of the invention relates to the technical field of internet, in particular to a data transmission method, a data transmission device, a server and a storage medium.
Background
For a superior local area network and an inferior local area network of a national standard networking, the superior local area network and the inferior local area network are respectively in different private networks, and a public network is arranged between the private networks. The NAT device is required to convert the network address twice, and the device in the upper local area network can monitor the live condition in the lower local area network.
After the signaling channel is established, because the flow sending address and the port negotiated through the signaling channel are private network addresses, in the data transmission process, after passing through NAT equipment corresponding to a lower-level local area network, a source IP and the port of the private network are converted into public network addresses, and the upper-level local area network cannot identify an image collector for sending data through the public network addresses.
The current scheme is that thousands or even tens of thousands of ports are mapped by a superior local area network to receive data, and the data sent by different image collectors are received by different ports, but the ports in a private network are mapped too much and are easily attacked, and the network security is threatened.
Disclosure of Invention
The embodiment of the invention provides a data transmission method, a data transmission device, a server and a storage medium, which are used for determining information of an image collector for sending data for the data received by one port.
In an embodiment, an embodiment of the present invention provides a data transmission method, which is applied to a first server in a first local area network, and includes:
responding to a data acquisition request sent by a second server in a second local area network, and generating a target data source identifier;
sending a confirmation request carrying the target data source identifier to at least one image collector to determine a target image collector for the target data source identifier from the at least one image collector;
and acquiring the identification information of the target image collector, and sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network through the second server, so that the media forwarding server determines the identification information of the target image collector which sends the data according to the target data source identifier carried in the received data.
In another embodiment, an embodiment of the present invention provides a data transmission method, which is applied to a second server in a second local area network, and includes:
sending a data acquisition request to a first server in a first local area network, so that the first server generates a target data source identifier in response to the data acquisition request;
and if receiving the target data source identifier and the identification information of the target image collector sent by the first server, sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data.
In another embodiment, an embodiment of the present invention provides a data transmission method, which is applied to a media forwarding server in a second local area network, and includes:
receiving data which is sent by a target image collector and carries a target data source identifier;
and determining the identification information of the target image collector according to the target data source identifier, the pre-stored target data source identifier and the pre-stored identification information of the target image collector.
In an embodiment, an embodiment of the present invention further provides a data transmission apparatus, configured to a first server in a first local area network, including:
the target data source identifier generating module is used for responding to a data acquisition request sent by a second server in a second local area network and generating a target data source identifier;
a target image collector determining module, configured to send a confirmation request carrying the target data source identifier to at least one image collector, so as to determine a target image collector for the target data source identifier from the at least one image collector;
and the identification information sending module is used for acquiring the identification information of the target image collector, and sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network through the second server, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data.
In another embodiment, an embodiment of the present invention further provides a data transmission apparatus, where the apparatus is configured in a second server in a second local area network, and the apparatus includes:
a data obtaining request sending module, configured to send a data obtaining request to a first server in a first local area network, so that the first server generates a target data source identifier in response to the data obtaining request;
and the forwarding module is used for sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network if the identification information of the target data source identifier and the target image collector sent by the first server is received, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data.
In another embodiment, an embodiment of the present invention further provides a data transmission apparatus, where the apparatus is configured at a media forwarding server in a second local area network, and the apparatus includes:
the data receiving module is used for receiving data which is sent by the target image collector and carries a target data source identifier;
and the target image collector identification information determining module is used for determining the identification information of the target image collector according to the target data source identifier, the prestored target data source identifier and the identification information of the target image collector.
In an embodiment, an embodiment of the present invention further provides a server, including a first server in a first local area network, a second server in a second local area network, or a media forwarding server in the second local area network, including: one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement any of the above data transmission methods for a first server in a first local area network, or implement any of the above data transmission methods for a second server in a second local area network, or implement any of the above data transmission methods for a media forwarding server in a second local area network.
In one embodiment, the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements any one of the data transmission methods described in the present invention, the data transmission methods being applied to a first server in a first local area network, or any one of the data transmission methods described in the present invention, the data transmission methods being applied to a second server in a second local area network, or any one of the data transmission methods described in the present invention, the data transmission methods being applied to a media forwarding server in a second local area network.
In the embodiment of the invention, a target data source identifier is generated in response to a data acquisition request sent by a second server in a second local area network, a confirmation request carrying the target data source identifier is sent to at least one image collector, so that the target image collector is determined for the target data source identifier from the at least one image collector, and thus the target image collector is conveniently identified according to the target data source identifier, and the identification information of the target image collector is obtained, and the target data source identifier and the identification information of the target image collector are sent to a media forwarding server in the second local area network through the second server, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data, and thus, the identity of a data sender is accurately determined according to the target data source identifier carried by the data received through one port.
Drawings
Fig. 1 is a flowchart of a data transmission method applied to a first server in a first local area network according to an embodiment of the present invention;
fig. 2 is a flowchart of a data transmission method applied to a first server in a first local area network according to another embodiment of the present invention;
FIG. 3 is a signaling diagram of data transmission according to another embodiment of the present invention;
fig. 4 is a flowchart of a data transmission method applied to a second server in a second local area network according to an embodiment of the present invention;
FIG. 5 is a first diagram of the same destination-data source identifier differentiation provided by an embodiment of the present invention;
FIG. 6 is a second diagram illustrating the same destination-data source identifier differentiation according to an embodiment of the present invention;
fig. 7 is a flowchart of a data transmission method applied to a media forwarding server in a second local area network according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a data transmission apparatus applied to a first server in a first local area network according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a data transmission apparatus applied to a second server in a second local area network according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a data transmission apparatus applied to a media forwarding server in a second local area network according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a server according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a flowchart of a data transmission method applied to a first server in a first local area network according to an embodiment of the present invention. The data transmission method provided by the embodiment can be applied to the situation of determining the identity of a data sender, and typically, the embodiment of the invention can be applied to the situation of determining the identification information of a target image collector which sends data for the data received through one port. The method may specifically be performed by a data transmission device, which may be implemented by software and/or hardware, which may be integrated in a first server in a first local area network. Referring to fig. 1, the method of the embodiment of the present invention specifically includes:
s110, responding to a data acquisition request sent by a second server in a second local area network, and generating a target data source identifier.
The first server can be an image collector management platform, is connected with an image collector and manages the image collector. The second server may be a data display device management platform, and is connected to the data display device to manage the image display device. The image display device may be a video player or the like. Because the video player in the second local area network needs to play and display the live video collected by the image collector, the image collector needs to send the code stream data of the collected video to the video player through the network for playing.
After the code stream data sent by the image collector is subjected to address translation through the NAT device, the address of the data source is translated into a public network address, and the media forwarding server in the second local area network cannot determine which image collector sends the code stream data through the public network address after receiving the code stream data. If different ports are mapped to receive the code stream data sent by different image collectors, multiple ports need to be mapped to receive the code stream data sent by different image collectors. The scheme can cause that the port is easy to be attacked and the monitoring equipment is not safe. If only one port is mapped to receive the code stream data, the problem of streaming is caused, and the media forwarding server cannot judge the sender information of the code stream data. Therefore, in the embodiment of the application, a data source identifier is introduced, and the target data source identifier can be generated based on the GB/T28181 protocol standard. The format of the SSRC defined within the national standard may be: dddddddddd. Wherein, the 1 st bit is the identification bit of the history or real-time media stream, 0 is real-time, and 1 is history; bits 2 to 6 take bits 4 to 8 in a 20-bit SIP (Session Initiation Protocol) monitoring domain ID as a domain identifier; for example, "13010000002000000001" takes the number "10000"; the 7 th bit to the 10 th bit are used as the identifiers of the media streams in the domain, and are four decimal integers which are not repeated with 4 bits behind the SSRC value of the media stream generated in the current domain. The data source identifiers correspond to the image collectors one by one, so that the image collectors are identified, and the media forwarding server can conveniently identify the image collectors.
Illustratively, the second server sends a data acquisition request to the first server to request the image collector managed by the first server in the first local area network to send data, and the first server generates a target data source identifier in response to the data acquisition request so as to mark a different image collector with the data source identifier.
S120, sending a confirmation request carrying the target data source identifier to at least one image collector to determine a target image collector for the target data source identifier from the at least one image collector.
For example, since the target data source identifier is generated by the first server and no association relationship with the image collector is established, the first server may send the target data source identifier to at least one image collector connected to the first server, and after each image collector receives the target data source identifier, the image collectors perform internal negotiation to confirm and determine the target image collector associated with the target data source identifier, so as to identify the target image collector by the target data source identifier.
In the embodiment of the application, after each image collector confirms the target image collector associated with the target data source identifier, the target image collector sends a confirmation message carrying the target data source identifier to the first server. Because the target image collector and the first server are both located in the first local area network, the target image collector sends a confirmation message, such as 200OK, to the first server through the private network address, and the first server can determine the identification information of the target image collector sending the data, where the identification information may be a camera code of the target image collector, that is, the identity of the target image collector can be identified through the camera code of the target image collector.
In the embodiment of the present application, the data obtaining request and the data confirming request further include a data receiving port of the media forwarding server, and the data receiving port is used for the image collector to send data to the media forwarding server according to the port.
S130, acquiring the identification information of the target image collector, and sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network through the second server, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data.
Illustratively, the first server obtains identification information of the target image collector, obtains a target data source identifier through a confirmation message sent by the target image collector, and sends the target data source identifier and the identification information of the target image collector to the second server, and the second server sends the target data source identifier and the identification information of the target image collector to the media forwarding server, or the second server establishes a correspondence table between the target data source identifier and the identification information of the target image collector, and the second server sends the correspondence table to the media forwarding server. And the media forwarding server receives and stores the target data source identifier and the identification information of the target image collector, and after receiving the data carrying the target data source identifier, the media forwarding server determines the information of the target image collector according to the target data source identifier so as to determine the identity of the data sender.
In the embodiment of the present invention, in response to a data acquisition request sent by a second server in a second local area network, a target data source identifier is generated, a confirmation request carrying the target data source identifier is sent to at least one image collector, so as to determine a target image collector for the target data source identifier from the at least one image collector, so as to identify the target image collector according to the target data source identifier, and by acquiring identification information of the target image collector, and sending the target data source identifier and the identification information of the target image collector to a media forwarding server in the second local area network through the second server, so that the media forwarding server determines identification information of the target image collector sending data according to the target data source identifier carried in the received data, so as to accurately determine the identity of a data sender according to the target data source identifier carried by the data received through a port.
Fig. 2 is a flowchart of a data transmission method according to another embodiment of the present invention. For further optimization of the embodiments, details which are not described in detail in the embodiments are described in the embodiments. Referring to fig. 2, the data transmission method provided in this embodiment may include:
s210, first public network address information obtained by converting first private network address information of the first local area network internal equipment is obtained.
Because the device in the first local area network needs to transmit data to the device in the second local area network by traversing the public network, two times of network address conversion are needed between the first local area network and the public network and between the second local area network and the public network. And converting the first private network address information of the equipment in the first local area network to obtain first public network address information, and converting the second private network address information of the equipment in the second local area network to obtain second public network address information. The first server obtains first public network information obtained by the first private network address conversion, so that a message is sent to the second local area network according to the first public network address information, and the network address conversion can be carried out through the NAT equipment.
S220, sending a registration request to a second server according to the first public network address information, so that the registration request is sent to the second public network address information through the first public network address information and received by the second server, and responding to the registration request and returning registration success information by the second server to establish communication with the first server.
And the second public network address information is obtained by converting second private network address information of equipment in a second local area network.
For example, fig. 3 is a signaling diagram for data transmission according to another embodiment of the present invention, as shown in fig. 3, a NAT device allocates temporary first public network address information to a first server, the first server sends a registration request to a second server through the first public network address information, the registration request is sent to a network address in second public network address information through a network address in the first public network address information, and then the network address in the second public network address information is sent to a network address in second private network address information corresponding to the registration request, so as to be received by the second server. And after receiving the registration request, the second server returns a registration success message to the first server through the original channel and receives the keep-alive message sent by the first server so as to establish a signaling channel with the first server.
And S230, responding to a data acquisition request sent by a second server in the second local area network, and generating a target data source identifier.
S240, sending a confirmation request carrying the target data source identifier to at least one image collector to determine a target image collector for the target data source identifier from the at least one image collector.
And S250, acquiring the identification information of the target image collector, and sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network through the second server, so that the media forwarding server determines the identification information of the target image collector which sends the data according to the target data source identifier carried in the received data.
S260, after the second server sends the target data source identifier and the identification information of the target image collector to the media forwarding server, a data transmission notification message is sent.
Illustratively, after receiving the target data source identifier and the target image collector identification information sent by the first server, the second server sends the target data source identifier and the target image collector identification information to the media forwarding server. In order to ensure the ordering of data transmission, the second server transmits a data transmission notification message to the first server after transmitting the target data source identifier and the identification information of the target image collector to the media forwarding server, so as to notify the first server that the second server and the media forwarding server are ready to receive data.
And S270, sending the data transmission notification message to the target image collector, so that the target image collector sends data to a media forwarding server after receiving the data transmission notification message.
For example, the first server sends a data transmission notification message to the target image collector, so as to notify the target image collector that the data can be sent to the media forwarding server, thereby preventing the target image collector from sending the data to the media forwarding server when the media forwarding server does not receive the identifier of the target data source and the identification information of the target image collector, which may result in that the sender of the data cannot be determined.
According to the technical scheme of the embodiment of the invention, the first public network address information obtained by converting the first private network address information of the first local area network equipment is obtained, the registration request is sent to the second server according to the first public network address information, so that the registration request is sent to the second public network address information through the first public network address information to be received by the second server, and the second server responds to the registration request and returns the registration success information, so that the communication with the first server is established. The data transmission notification message is sent to the target image collector, so that the target image collector sends data to the media forwarding server after receiving the data transmission notification message, and the problem that the sender of the data cannot be determined because the target image collector sends the data to the media forwarding server when the media forwarding server does not receive the target data source identifier and the identification information of the target image collector is avoided.
Fig. 4 is a flowchart of a data transmission method applied to a second server in a second local area network according to an embodiment of the present invention. The data transmission method provided by the embodiment can be applied to the situation of determining the identity of a data sender, and typically, the embodiment of the invention can be applied to the situation of determining the identification information of a target image collector which sends data for the data received through one port. The method may be particularly performed by a data transmission device, which may be implemented in software and/or hardware, which may be integrated in a second server in a second local area network. For details which are not described in detail in the examples of the present application, reference is made to the examples given above. Referring to fig. 4, the method of the embodiment of the present invention specifically includes:
s310, sending a data acquisition request to a first server in the first local area network, so that the first server responds to the data acquisition request and generates a target data source identifier.
Illustratively, when a device in the second local area network needs to play and display a live scene in the first local area network, the second server sends a data acquisition request to the first server. Since the identity of the data sender cannot be determined for data received through one port, the first server generates a target data source identifier to identify the image collector in response to the data acquisition request.
In this embodiment of the present application, before sending the data obtaining request to the first server in the first local area network, the method further includes: acquiring second public network address information corresponding to second private network address information of equipment in a second local area network, and receiving a registration request of a first server through first public network address information corresponding to the second public network address information; and responding to the registration request and returning registration success information to establish communication with the first server.
Illustratively, the first server sends a registration request to the second server through the first public network address information, the registration request is sent to the network address in the second public network address information through the network address in the first public network address information, and then the network address in the second public network address information is sent to the network address in the second private network address information corresponding to the network address in the second public network address information so as to be received by the second server. And after receiving the registration request, the second server returns a registration success message to the first server through the original channel and receives the keep-alive message sent by the first server so as to establish a signaling channel with the first server.
In this embodiment of the application, the transmission channel establishment request further includes a data receiving port of the media forwarding server, and the data receiving port is used for sending a data acquisition request carrying the data receiving port from the first server to the image collector, so that the image collector sends data to the media forwarding server according to the port.
And S320, if the target data source identifier and the identification information of the target image collector sent by the first server are received, sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data.
For example, the second server forwards the received target data source identifier and the identification information of the target image collector to the media forwarding server, so that the media forwarding server can determine the identification information of the target image collector sending the data according to the target data source identifier carried in the received data, and determine the identity of the sender of the data.
In an embodiment of the present application, the method further includes: and sending a data transmission notification message to the first server, and after receiving the data transmission notification message, sending the data transmission notification message to the image collector so that the image collector sends data to the media forwarding server after receiving the transmission channel establishment confirmation message.
In an embodiment of the present application, the method further includes:
if the same target data source identifiers sent by the at least two first servers are received within a preset time period, performing keep-alive verification on the at least two first servers,
the keep-alive verification of the at least two first servers comprises:
sending a data transmission notification message to a first server, notifying an image collector of sending data carrying the same target data source identifier to a media forwarding server by the first server so that the media forwarding server combines the first public network address information and the target data source identifier as combined identification information of the image collector, and sending a data receiving confirmation message by a second server; the combined identification information is used for the media forwarding server to identify the identity of the image collector which sends the data;
if the data receiving confirmation message sent by the media forwarding server is not received, sending a message for closing the transmission channel to the first server; and the data receiving confirmation message is generated after the media forwarding server receives the data which is sent by the image collector and carries the same target data source identifier.
In the embodiment of the application, the keep-alive verification can be performed on at least two first servers according to the time sequence of the received target data source identifier, so that the keep-alive verification is performed on the first server which sends the data source identifier first, and then the keep-alive verification is performed on the first server which sends the data source identifier later. For example, the target data source identifier returned by the first server may be the same for the data transmission request sent by the second server, and therefore, further distinction is needed. If the time interval for receiving at least two identical target data source identifiers is smaller than the preset time interval, sending a data transmission notification message to a first server in the first local area network corresponding to the first received target data source identifier, and if the media forwarding server receives data carrying identical target data source identifiers, as shown in fig. 5, combining the first public network address information and the target data source identifiers to serve as new identification information of a target image collector sending the data. If no data is received, the transmission channel can be directly closed. As shown in fig. 6, the second server may continue to send the data transmission notification message to the first server, and wait for a preset time, for example, 10 seconds, and if the media forwarding server does not receive the data sent by the target image collector, the second server sends a bye notification to the first server to close the transmission channel, or, if the number of data transmission notification messages sent by the second server satisfies the preset number, and if the media forwarding servers do not receive the data sent by the target image collector, the second server sends the bye notification to the first server to close the transmission channel. For example, if the media forwarding server does not receive the data sent by the target image collector, the second server continues to send the data transmission notification message to the first server and waits for 10 seconds, if the media forwarding server still does not receive the feedback data, the second server continues to send the data transmission notification message to the first server and waits for 10 seconds, and if the media forwarding server still does not receive the feedback data, the second server sends the bye notification to the first server and closes the transmission channel. Similarly, for other same target data source identifiers, the execution process is the same as the above scheme, and the execution sequence is consistent with the sequence of receiving the same target data source identifiers.
In the embodiment of the invention, a second server target data source identifier sends a data acquisition request to a first server in a first local area network, so that the first server responds to the data acquisition request to generate a target data source identifier, and thus a target image collector is conveniently identified according to the target data source identifier.
Fig. 7 is a flowchart of a data transmission method applied to a media forwarding server in a second local area network according to an embodiment of the present invention. The data transmission method provided by the embodiment can be applied to the situation of determining the identity of a data sender, and typically, the embodiment of the invention can be applied to the situation of determining the identification information of a target image collector which sends data for the data received through one port. The method may be specifically performed by a data transmission apparatus, which may be implemented by software and/or hardware, and which may be integrated in a media forwarding server in the second local area network. Referring to fig. 7, the method of the embodiment of the present invention specifically includes:
and S410, receiving data which is sent by the target image collector and carries the target data source identifier.
Illustratively, the second server sends a data acquisition request to the first server to request the image collector managed by the first server in the first local area network to send data, and the first server generates a target data source identifier in response to the data acquisition request so as to mark different image collectors by the data source identifier. The first server obtains identification information of the target image collector, obtains a target data source identifier through a confirmation message sent by the target image collector, and sends the target data source identifier and the identification information of the target image collector to the second server, the second server sends the target data source identifier and the identification information of the target image collector to the media forwarding server, or a corresponding table of the target data source identifier and the identification information of the target image collector can be established by the second server, and the second server sends the corresponding table to the media forwarding server. And after sending the target data source identifier and the identification information of the target image collector to the media forwarding server, the second server sends a data transmission notification message to the first server, so that the first server is notified that the second server and the media forwarding server are ready to receive data currently. And the target image collector sends data carrying the target data source identifier to the media forwarding server so as to be received by the media forwarding server.
And S420, determining the identification information of the target image collector according to the target data source identifier, the pre-stored target data source identifier and the pre-stored identification information of the target image collector.
And the media forwarding server receives and stores the target data source identifier and the identification information of the target image collector, and after receiving the data carrying the target data source identifier, the media forwarding server determines the information of the target image collector according to the target data source identifier so as to determine the identity of the data sender.
In this embodiment of the present application, before determining the identification information of the target image collector according to the target data source identifier, and the pre-stored target data source identifier and the identification information of the target image collector, the method further includes: and receiving and storing the target data source identifier and the identification information of the target image collector sent by a second server in a second local area network.
In an embodiment of the present application, the method further includes: and if data carrying the same target data source identifier are received, combining the first public network address information and the target data source identifier to be used as combined identification information of the image collector.
For example, the target data source identifier returned by the first server may be the same for the data transmission request sent by the second server, and therefore, further distinction is needed. If the time interval for receiving at least two same target data source identifiers is smaller than the preset time interval, sending a data transmission notification message to a first server in a first local area network corresponding to the target data source identifier which is received first, and if the media forwarding server receives data carrying the same target data source identifier, combining the first public network address information and the target data source identifier to be used as new identification information of a target image collector for sending the data. If the data is not received, the second server continues to send the data transmission notification message to the first server and waits for a preset time, for example, 10 seconds. And if the number of the data transmission notification messages sent by the second server meets the preset number and the media forwarding servers do not receive the data sent by the target image collector after waiting for the preset time, the second server sends a bye notification to the first server so as to close the transmission channel. Similarly, for other same target data source identifiers, the execution process is the same as in the above scheme, and the execution sequence is consistent with the sequence of receiving the same target data source identifiers.
In the embodiment of the invention, data which is sent by a target image collector and carries a target data source identifier is received; and determining the identification information of the target image collector according to the target data source identifier, the prestored target data source identifier and the identification information of the target image collector, so that the identification information of the target image collector for sending the data is accurately determined according to the target data source identifier carried by the data received through one port, and the identity of the data sender is clarified.
Fig. 8 is a schematic structural diagram of a data transmission device configured in a first server in a first local area network according to an embodiment of the present invention. The device can be applied to the condition of determining the identity of a data sender, and typically, the embodiment of the invention can be applied to the condition of determining the identification information of a target image collector which sends data for the data received through one port. The apparatus may be implemented in software and/or hardware, and the apparatus may be integrated in a first server in a first local area network. Referring to fig. 8, the apparatus specifically includes:
a target data source identifier generating module 510, configured to generate a target data source identifier in response to a data obtaining request sent by a second server in a second local area network;
a target image collector determining module 520, configured to send a confirmation request carrying the target data source identifier to at least one image collector, so as to determine a target image collector for the target data source identifier from the at least one image collector;
an identification information sending module 530, configured to obtain the identification information of the target image collector, and send the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network through the second server, so that the media forwarding server determines, according to the target data source identifier carried in the received data, the identification information of the target image collector that sends the data.
In the embodiment of the present application, the method further includes:
the first public network address information acquisition module is used for acquiring first public network address information obtained by converting first private network address information of equipment in the first local area network;
the registration module is used for sending a registration request to the second server according to the first public network address information so that the registration request is sent to the second public network address information through the first public network address information to be received by the second server, and the second server responds to the registration request and returns registration success information so as to establish communication with the first server;
and the second public network address information is obtained by converting second private network address information of equipment in a second local area network.
In the embodiment of the present application, the method further includes:
a data transmission notification message receiving module, configured to receive a data transmission notification message sent by the second server after sending the target data source identifier and the identification information of the target image collector to the media forwarding server;
and the data transmission notification message forwarding module is used for sending the data transmission notification message to the target image collector so that the target image collector sends data to a media forwarding server after receiving the data transmission notification message.
In the embodiment of the present application, the data obtaining request and the data confirming request further include a data receiving port of the media forwarding server, and the data receiving port is used for the image collector to send data to the media forwarding server according to the port.
In the embodiment of the application, the target data source identifier is generated based on the GB/T28181 protocol standard.
The data transmission device configured in the first server in the first lan according to the embodiments of the present application can execute the data transmission method applied to the first server in the first lan according to any embodiments of the present application, and has the corresponding functional modules and beneficial effects of the execution method.
Fig. 9 is a schematic structural diagram of a data transmission device configured in a second server in a second local area network according to an embodiment of the present invention. The device can be applied to the condition of determining the identity of a data sender, and typically, the embodiment of the invention can be applied to the condition of determining the identification information of a target image collector which sends data for the data received through one port. The apparatus may be implemented by software and/or hardware, and the apparatus may be integrated in a second server in a second local area network. Referring to fig. 9, the apparatus specifically includes:
a data obtaining request sending module 610, configured to send a data obtaining request to a first server in a first local area network, so that the first server generates a target data source identifier in response to the data obtaining request;
the forwarding module 620 is configured to send the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network if the target data source identifier and the identification information of the target image collector sent by the first server are received, so that the media forwarding server determines, according to the target data source identifier carried in the received data, the identification information of the target image collector sending the data.
In the embodiment of the present application, the method further includes:
the second public network address information acquisition module is used for sending a data acquisition request to a first server in the first local area network so that the first server responds to the data acquisition request and generates a target data source identifier;
and the communication establishing module is used for responding to the registration request and returning registration success information so as to establish communication with the first server.
In the embodiment of the present application, the method further includes:
and the transmission notification message sending module is used for sending a data transmission notification message to the first server, and after receiving the data transmission notification message, the first server sends the data transmission notification message to the image collector, so that the image collector sends data to the media forwarding server after receiving the transmission channel establishment confirmation message.
In this embodiment, the transmission channel establishment request further includes a data receiving port of the media forwarding server, and the data receiving port is used for sending a data acquisition request carrying the data receiving port from the first server to the image collector, so that the image collector sends data to the media forwarding server according to the port.
In the embodiment of the present application, the method further includes:
a verification module, configured to perform keep-alive verification on at least two first servers if the same target data source identifier sent by the at least two first servers is received within a preset time period,
in an embodiment of the present application, the verification module includes:
a notification sending module, configured to send a data transmission notification message to a first server, where the first server notifies an image collector to send data carrying the same target data source identifier to a media forwarding server, so that the media forwarding server combines the first public network address information and the target data source identifier to serve as combined identification information of the image collector, and a second server sends a data reception confirmation message; the combined identification information is used for the media forwarding server to identify the identity of the image collector which sends the data;
the channel closing module is used for sending a transmission channel closing message to the first server if the data receiving confirmation message sent by the media forwarding server is not received; and the data receiving confirmation message is generated after the media forwarding server receives the data which is sent by the image collector and carries the same target data source identifier.
The data transmission device configured in the second server in the second lan according to the embodiments of the present application can execute the data transmission method applied to the second server in the second lan according to any embodiments of the present application, and has functional modules and beneficial effects corresponding to the execution method.
Fig. 10 is a schematic structural diagram of a data transmission device configured in a media forwarding server in a second local area network according to an embodiment of the present invention. The device can be suitable for determining the identity of a data sender, and typically, the embodiment of the invention can be suitable for determining the identification information of a target image collector which sends data for the data received through one port. The apparatus may be implemented by software and/or hardware, and the apparatus may be integrated in a media forwarding server in the second local area network. Referring to fig. 10, the apparatus specifically includes:
a data receiving module 710, configured to receive data sent by a target image collector and carrying a target data source identifier;
and a target image collector identification information determining module 720, configured to determine, according to the target data source identifier, and the prestored target data source identifier and target image collector identification information, the target image collector identification information.
In the embodiment of the present application, the method further includes:
and the identification information storage module is used for receiving and storing the target data source identifier and the identification information of the target image collector, which are sent by the second server in the second local area network.
In the embodiment of the present application, the method further includes:
and the combined identification information determining module is used for combining the first public network address information and the target data source identifier as the combined identification information of the image collector if data carrying the same target data source identifier is received.
The data transmission device configured in the media forwarding server in the second lan according to the embodiments of the present application can execute the data transmission method applied to the media forwarding server in the second lan according to any embodiments of the present application, and has functional modules and beneficial effects corresponding to the execution method.
Fig. 11 is a schematic structural diagram of a server according to an embodiment of the present invention. FIG. 11 illustrates a block diagram of an exemplary server 812 suitable for use in implementing embodiments of the invention. The server 812 shown in fig. 11 is only an example and should not bring any limitation to the function and the scope of use of the embodiments of the present invention.
As shown in fig. 11, the server 812 may be a first server in a first local area network, a second server in a second local area network, or a media forwarding server in the second local area network, and includes: one or more processors 816; a memory 828, configured to store one or more programs, which when executed by the one or more processors 816 cause the one or more processors 816 to implement the data transmission method applied to the first server in the first local area network according to the embodiment of the present invention, including:
responding to a data acquisition request sent by a second server in a second local area network, and generating a target data source identifier;
sending a confirmation request carrying the target data source identifier to at least one image collector to determine a target image collector for the target data source identifier from the at least one image collector;
and acquiring the identification information of the target image collector, and sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network through the second server, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data.
Alternatively, the one or more processors 816 implement the data transmission method applied to the second server in the second local area network according to the embodiment of the present invention, including:
sending a data acquisition request to a first server in a first local area network, so that the first server generates a target data source identifier in response to the data acquisition request;
and if the target data source identifier and the identification information of the target image collector sent by the first server are received, sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data.
Alternatively, the one or more processors 816 implement the media forwarding server provided by the embodiment of the present invention and applied in the second local area network, including:
receiving data which is sent by a target image collector and carries a target data source identifier;
and determining the identification information of the target image collector according to the target data source identifier, the pre-stored target data source identifier and the pre-stored identification information of the target image collector.
The components of server 812 may include, but are not limited to: one or more processors or processors 816, a server memory 828, and a bus 818 that couples the various server components (including the server memory 828 and the processors 816).
Bus 818 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, industry Standard Architecture (ISA) bus, micro-channel architecture (MAC) bus, enhanced ISA bus, video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
The server 812 typically includes a variety of computer server readable storage media. These storage media may be any available storage media that can be accessed by the server 812 and includes both volatile and nonvolatile storage media, removable and non-removable storage media.
The server memory 828 may include computer server readable storage media in the form of volatile memory, such as Random Access Memory (RAM) 830 and/or cache memory 832. The server 812 may further include other removable/non-removable, volatile/nonvolatile computer server storage media. By way of example only, storage server 834 may be used to read from and write to non-removable, nonvolatile magnetic storage media (not shown in FIG. 11, often referred to as "hard drives"). Although not shown in FIG. 11, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical storage medium) may be provided. In such cases, each drive may be connected to the bus 818 by one or more data storage media interfaces. Memory 828 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 840 having a set (at least one) of program modules 842 may be stored, for example, in memory 828, such program modules 862 including, but not limited to, an operating server, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may include an implementation of a network environment. Program modules 862 generally perform the functions and/or methodologies of embodiments of the invention as described herein.
The server 812 may also communicate with one or more external servers 814 (e.g., keyboard, pointing server, display 826, etc.), with one or more servers that enable a user to interact with the server 812, and/or with any servers (e.g., network card, modem, etc.) that enable the server 812 to communicate with one or more other computing servers. Such communication may occur via input/output (I/O) interfaces 822. Moreover, the server 812 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network such as the Internet) via the network adapter 820. As shown in FIG. 11, the network adapter 820 communicates with the other modules of the server 812 over the bus 818. It should be appreciated that although not shown in FIG. 11, other hardware and/or software modules may be used in conjunction with the server 812, including but not limited to: microcode, server drives, redundant processing units, external disk drive arrays, RAID servers, tape drives, and data backup storage servers, among others.
The processor 816 executes various functional applications and data processing by executing at least one of other programs of the plurality of programs stored in the server memory 828, for example, to implement a data transmission method provided by an embodiment of the present invention.
One embodiment of the present invention provides a storage medium containing computer-executable instructions that when executed by a computer processor perform a data transfer method applied to a first server in a first local area network, comprising:
responding to a data acquisition request sent by a second server in a second local area network, and generating a target data source identifier;
sending a confirmation request carrying the target data source identifier to at least one image collector to determine a target image collector for the target data source identifier from the at least one image collector;
and acquiring the identification information of the target image collector, and sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network through the second server, so that the media forwarding server determines the identification information of the target image collector which sends the data according to the target data source identifier carried in the received data.
Or, the data transmission method applied to the second server in the second local area network provided by the embodiment of the present invention includes:
sending a data acquisition request to a first server in a first local area network, so that the first server generates a target data source identifier in response to the data acquisition request;
and if receiving the target data source identifier and the identification information of the target image collector sent by the first server, sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data.
Or, the implementation of the media forwarding server applied to the second local area network provided by the embodiment of the present invention includes:
receiving data which is sent by a target image collector and carries a target data source identifier;
and determining the identification information of the target image collector according to the target data source identifier, the pre-stored target data source identifier and the pre-stored identification information of the target image collector.
Computer storage media for embodiments of the present invention can take the form of any combination of one or more computer-readable storage media. The computer readable storage medium may be a computer readable signal storage medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor server, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In embodiments of the invention, the computer readable storage medium may be any tangible storage medium that can contain, or store a program for use by or in connection with an instruction execution server, apparatus, or device.
A computer readable signal storage medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal storage medium may also be any computer readable storage medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution server, apparatus, or device.
Program code embodied on a computer readable storage medium may be transmitted using any appropriate storage medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.

Claims (12)

1. A data transmission method applied to a first server in a first local area network, the method comprising:
responding to a data acquisition request sent by a second server in a second local area network, and generating a target data source identifier;
sending a confirmation request carrying the target data source identifier to at least one image collector to determine a target image collector for the target data source identifier from the at least one image collector; acquiring identification information of the target image collector, and sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network through the second server, so that the media forwarding server determines the identification information of the target image collector which sends the data according to the target data source identifier carried in the received data; the identification information is a camera code of a target image collector which sends the data;
the first server sends the target data source identifier to at least one image collector connected with the first server, each image collector receives the target data source identifier and then internally negotiates and confirms to determine the target image collector associated with the target data source identifier, and the target image collector is identified through the target data source identifier.
2. The method of claim 1, wherein before responding to the data acquisition request sent by the second server in the second local area network, further comprising:
acquiring first public network address information obtained by converting first private network address information of first local area network equipment;
sending a registration request to a second server according to the first public network address information so that the registration request is sent to the second public network address information through the first public network address information to be received by the second server, and the second server responds to the registration request and returns registration success information so as to establish communication with the first server;
and the second public network address information is obtained by converting second private network address information of equipment in a second local area network.
3. The method of claim 1, further comprising:
receiving a data transmission notification message sent by the second server after the second server sends the target data source identifier and the identification information of the target image collector to the media forwarding server;
and sending the data transmission notification message to the target image collector so that the target image collector sends data to a media forwarding server after receiving the data transmission notification message.
4. The method of claim 1, wherein the data acquisition request and the confirmation request further include a data receiving port of the media forwarding server, and the data receiving port is used for the image collector to send data to the media forwarding server according to the port.
5. A data transmission method applied to a second server in a second local area network, the method comprising:
sending a data acquisition request to a first server in a first local area network, so that the first server generates a target data source identifier in response to the data acquisition request;
and if receiving the target data source identifier and the identification information of the target image collector sent by the first server, sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data.
6. The method of claim 5, further comprising:
if the same target data source identifiers sent by the at least two first servers are received within a preset time period, performing keep-alive verification on the at least two first servers,
the keep-alive verification of the at least two first servers comprises:
sending a data transmission notification message to a first server, notifying an image collector of the first server to send data carrying the same target data source identifier to a media forwarding server so that the media forwarding server combines the first public network address information and the target data source identifier as combined identification information of the image collector, and sending a data receiving confirmation message to a second server; the combined identification information is used for the media forwarding server to identify the identity of the image collector which sends the data;
if the data receiving confirmation message sent by the media forwarding server is not received, sending a message for closing the transmission channel to the first server; the data receiving confirmation message is generated after the media forwarding server receives the data which is sent by the image collector and carries the same target data source identifier;
the first public network address information is obtained by converting first private network address information of the first local area network internal equipment.
7. A data transmission method, applied to a media forwarding server in a second local area network, the method comprising:
receiving data which is sent by a target image collector and carries a target data source identifier;
and determining the identification information of the target image collector according to the target data source identifier, the pre-stored target data source identifier and the pre-stored identification information of the target image collector.
8. A data transmission apparatus, wherein the apparatus is configured to a first server in a first local area network, comprising:
the target data source identifier generating module is used for responding to a data acquisition request sent by a second server in a second local area network and generating a target data source identifier;
a target image collector determining module, configured to send a confirmation request carrying the target data source identifier to at least one image collector, so as to determine a target image collector for the target data source identifier from the at least one image collector;
the identification information sending module is used for acquiring the identification information of the target image collector and sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network through the second server so that the media forwarding server determines the identification information of the target image collector which sends the data according to the target data source identifier carried in the received data; the identification information is a camera code of a target image collector which sends the data;
the first server sends the target data source identifier to at least one image collector connected with the first server, each image collector receives the target data source identifier and then internally negotiates and confirms to determine the target image collector associated with the target data source identifier, and the target image collector is identified through the target data source identifier.
9. A data transmission apparatus, wherein the apparatus is configured to a second server in a second local area network, comprising:
a data obtaining request sending module, configured to send a data obtaining request to a first server in a first local area network, so that the first server generates a target data source identifier in response to the data obtaining request;
and the forwarding module is used for sending the target data source identifier and the identification information of the target image collector to a media forwarding server in a second local area network if the target data source identifier and the identification information of the target image collector sent by the first server are received, so that the media forwarding server determines the identification information of the target image collector sending the data according to the target data source identifier carried in the received data.
10. A data transmission apparatus, wherein the apparatus is configured as a media forwarding server in a second local area network, comprising:
the data receiving module is used for receiving data which is sent by the target image collector and carries a target data source identifier;
and the target image collector identification information determining module is used for determining the identification information of the target image collector according to the target data source identifier, the prestored target data source identifier and the identification information of the target image collector.
11. A server, wherein the server comprises a first server in a first local area network, a second server in a second local area network, or a media forwarding server in a second local area network, comprising: one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the data transfer method of any one of claims 1-4 as applied to a first server in a first local area network, or implement the data transfer method of any one of claims 5 or 6 as applied to a second server in a second local area network, or implement the data transfer method of claim 7 as applied to a media forwarding server in a second local area network.
12. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the data transmission method of any one of claims 1 to 4, as applied to a first server in a first local area network, or carries out the data transmission method of any one of claims 5 or 6, as applied to a second server in a second local area network, or carries out the data transmission method of any one of claim 7, as applied to a media forwarding server in a second local area network.
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