CN105554540B - The implementation method and device of a kind of network interface in condition receiving card - Google Patents
The implementation method and device of a kind of network interface in condition receiving card Download PDFInfo
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- CN105554540B CN105554540B CN201511028019.8A CN201511028019A CN105554540B CN 105554540 B CN105554540 B CN 105554540B CN 201511028019 A CN201511028019 A CN 201511028019A CN 105554540 B CN105554540 B CN 105554540B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
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Abstract
The present invention is suitable for digital TV technology.Provide the implementation method and device of a kind of network interface in condition receiving card.Implementation method of the network interface in condition receiving card includes: to obtain network packet by Microsoft Loopback Adapter；Parse the IP address in network packet and port；Network packet is Resealed according to the corresponding protocol type in port；Network packet after Resealing is sent to the corresponding ports that IP address corresponds to equipment.The invention enables condition receptions in the case where not true network interface card, by the function of realizing entity network interface card in condition receiving card using Microsoft Loopback Adapter, the interface of a unified standard is provided for different CA/DRM and network application client, applications client change interface is not needed, reduces realization difficulty and transplantability is good.
Description
Technical field
The invention belongs to a kind of realization side of digital TV technology more particularly to network interface in condition receiving card
Method and device.
Background technique
The network interface that current CA/DRM client or other third party's clients is generally based on standard is developed,
Equipment (set-top box, host or condition receiving card) is all based on true network interface card application and development, if equipment does not carry
Network interface card, in realization, these apply the upper network call that just will appear to malfunction substantially, these client providers is needed to explain one by one often
The definition of a network call function, integrator reconfigures function, for the network operation of Linux, at least four aspects
Function need to realize:
1) specific network function, such as socket, send, recv, getaddrinfo, gethostbyname etc., no
The function of same client call is different, needs to customize encapsulation, system platform increase means that encapsulation function is write in increase；
2) Linux has equipment a general interface, open, read, write, close, ioctl be all it is general,
The I O process for modifying network will just realize the processing of other all IO simultaneously；
3) Poll, although the I O multiplexing function of select be not it is directly related with network, often with network call letter
Number is applied in combination, it is also desirable to which subsidiary encapsulation is realized；
4) function that different platform is called is although similar, but defines difference, needs when transplanting different operating system platform
Modification.
The shortcomings that prior art, is mainly manifested in the following aspects:
1) the relevant function number of network is numerous, even client provider is also difficult to list all related letters completely
Number, such as function gethostbyname and gethostbyname_r, function name is close but function is variant, and client provides
Quotient, which also has, omits explanation, the heavy workload of customization；
2) all device drives of Linux can be handled with file mode, and network function encapsulation also contains
The work of file process function encapsulation is needed to reappear and be write if system platform change, the big heavy workload of the difficulty of realization；
It is that multiple equipment common method is effectively treated, often although 3) I O multiplexing function is not directly related with network
It is used with network call combination of function, it is also desirable to which subsidiary encapsulation realizes that these functions are served all I/O devices, are related to
The regulative strategy of system kernel, modification difficulty are big；
4) migration platform will encapsulate function, and the different function that different clients use cannot disposably include all letters
Number, the integrated of different platform require to customize integrated, heavy workload.
Summary of the invention
The embodiment of the present invention provides the implementation method and device of a kind of network interface in condition receiving card (abbreviation CAM),
It aims to solve the problem that and realizes difficult problem without the device network interface of true network interface card in the prior art.
The embodiments of the present invention are implemented as follows, a kind of implementation method of network interface in condition receiving card, this method
Include:
Network packet is obtained by Microsoft Loopback Adapter；
Parse the IP address in network packet and port；
Network packet is Resealed according to the corresponding protocol type in port；
Network packet after Resealing is sent to the corresponding ports that IP address corresponds to equipment.
The embodiment of the present invention also provides a kind of realization device of network interface in condition receiving card, which includes:
Network packet obtains module, for obtaining network packet by Microsoft Loopback Adapter；
Parsing module, for parsing IP address and port in network packet；
Package module, for Resealing network packet according to the corresponding protocol type in port；
Network packet sending module corresponds to equipment for the network packet after Resealing to be sent to IP address
Corresponding ports.
The present invention is made it possible to by utilizing Microsoft Loopback Adapter to realize the function of entity network interface card in condition receiving card as difference
CA/DRM and network application client the interface of one unified standard is provided, relative to Resealing system function glibc, this
The method that invention provides only needs to encapsulate UDP/TCP/ARP packet, has both eliminated standard IO function/I O multiplexing function envelope again
Dress, and eliminate CA/DRM client and be integrator's custom interface or be difficult to realize and modify since integrator Reseals function
The problem of process.Implementation method of the network interface provided by the invention in condition receiving card has universal adaptability, Neng Gouguang
The general transplanting applied to different clients receives for product especially for different condition, and transplanting different CA clients can be total to
It is driven with the Microsoft Loopback Adapter of a set of maturation, the network function numerous for system can be handled, and primary realize can not have to
Applications client uses, and does not need applications client change interface, reduces realization difficulty, and the driving of Microsoft Loopback Adapter handles energy
It is enough to be developed in application layer, facilitate the debugging of docking application layer.
Detailed description of the invention
Fig. 1 is a kind of process of implementation method of the network interface of the offer of the embodiment of the present invention one in condition receiving card
Figure；
Fig. 2 is a kind of process of implementation method of the network interface provided by Embodiment 2 of the present invention in condition receiving card
Figure；
Fig. 3 is a kind of process of implementation method of the network interface of the offer of the embodiment of the present invention three in condition receiving card
Figure；
Fig. 4 is a kind of process of implementation method of the network interface of the offer of the embodiment of the present invention four in condition receiving card
Figure；
Fig. 5 is a kind of process of implementation method of the network interface of the offer of the embodiment of the present invention five in condition receiving card
Figure；
Fig. 6 is that a kind of structure of realization device of the network interface of the offer of the embodiment of the present invention six in condition receiving card is shown
It is intended to；
Fig. 7 is a kind of structure of realization device of the network interface of example offer of the invention in condition receiving card
Schematic diagram；
Fig. 8 is the operation principle schematic diagram of the Microsoft Loopback Adapter of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Since current CA/DRM client or other third party's clients are typically all to be based on equipment with true network interface card
The network interface application and development of standard upper just will appear if equipment does not carry network interface card realizing that these are applied substantially
Network call error, needs these client providers to explain one by one the definition of each network call function, needs integrator's weight
Neotectonics function, driving is integrated one by one, and the present invention is exactly directed to this current status bring interface and realizes that difficulty is big, workload
The a solution provided greatly.
Embodiment one
Fig. 1 is a kind of process of implementation method of the network interface of the offer of the embodiment of the present invention one in condition receiving card
Figure, realization of the network interface according to an embodiment of the invention in condition receiving card is specifically described below with reference to Fig. 1
Method, as shown in Figure 1, method includes the following steps:
S101, network packet is obtained by Microsoft Loopback Adapter.
Wherein, which is equal to IP data packet, and Microsoft Loopback Adapter (i.e. TUN/TAP equipment) is the interface of software,
, instead of the function of true network interface card, the network packetization that ICP/IP protocol stack can be handled well is transmitted to any one using TUN/ for it
The process of TAP device drives is dealt into physical link again after being handled again by process.It accepts the transmission of ICP/IP protocol stack
Order, while the order of ICP/IP protocol stack is responded, true network interface card only all is transferred to the processing of these orders certainly, all
It is the operation between inner nuclear layer.
S102, the IP address in parsing network packet and port；
S103, network packet is Resealed according to the corresponding protocol type in port.
Wherein, the content of encapsulation includes but is not limited to session number (including IP address and port), load data, agreement life
Enable etc..Session number is the ID number communicated between condition reception and host, and Microsoft Loopback Adapter is according to the corresponding session number in port and mesh
Marking device establishes connection.
Protocol type specifically includes that Transmission Control Protocol (being indicated with 6), and udp protocol (is indicated) with 17.
S104, the network packet after Resealing is sent to the corresponding ports that IP address corresponds to equipment.
Fig. 8 is now provided in order to better understand the present embodiment, Fig. 8 is the working principle of the Microsoft Loopback Adapter of the embodiment of the present invention
Schematic diagram, as shown in figure 8, number mark therein indicates interface, it is as follows specific corresponding to relationship:
1. indicating the interface of network application client and ICP/IP protocol stack；2. indicating ICP/IP protocol stack and TUN/TAP
The interface of equipment；3. indicating the interface of TUN/TAP equipment and character driving；4. the driving of expression character connects with network data processing
Mouthful；5. indicating the interface of network data processing and host.
In Fig. 8, TUN/TAP driving equipment is for turning IP data packet for receiving IP data packet, character drive module
Change the file of segment into, clip file is converted into static ether data packet, ICP/IP protocol stack by network data processing module
It is that network function realization is converted into ether data packet, ether data packet is converted into fluid IP data packet by TUN/TAP equipment.
Specifically, network data processing module parses network protocol, IP address in the packet header of IP packet, from TCP and UDP
Head parse go out port numbers, be mapped as one group of identification information and the session number of host assignment.
Wherein, condition reception is mainly used for realizing three kinds of functions:
1, the initialization and configuration part of system: being arranged Microsoft Loopback Adapter in systems, and setting network interface path allows all
Network interface commands all pass through Microsoft Loopback Adapter handle；
2, TAP is handled: being the interface of application layer and kernel, the networking command of all clients is connected directly to virtually
Network interface card is monitored the data of network transmission by TAP, analyzes the communications protocol of data, on the other hand, receives CI/CI+ data, weight
Data are simultaneously driven input to TAP by new group packet, protocal analysis；
3, CI/CI+ transfers: data are carried out according to the protocol requirement of CI/CI+ and are unpacked group packet, and CI/CI+ interface data is monitored,
Loopback CI/CI+ interface data.
TUN/TAP as Linux device customizing in systems.Network application client is usually CA company, network clothes
The client that quotient provides of being engaged in carries out network communication based on ICP/IP protocol using the network interface of standard.Network data processing is
The interface of TUN/TAP equipment and live network equipment is connected, this module needs to monitor TUN/TAP and sets in condition receiving system
The standby networking command sent by character driving and data are then the order and data for conveying TUN/TAP to CI/CI+ interface；
Another direction, the order and data sent from CI/CI+ are driven to TUN/TAP by network data processing module and are written.
Implementation method of the network interface provided in this embodiment in condition receiving card has universal adaptability, can be extensive
Applied to the transplanting of different clients, received for product especially for different condition, transplanting different CA clients can share
The Microsoft Loopback Adapter of a set of maturation drives, and the network function numerous for system can be handled, and primary realize can not have to answer
It is used with client, does not need applications client change interface, reduce realization difficulty.
Embodiment two
Fig. 2 is a kind of process of implementation method of the network interface provided by Embodiment 2 of the present invention in condition receiving card
Figure, as shown in Fig. 2, implementation method of the network interface provided in this embodiment in condition receiving card is including above-mentioned steps S102
On the basis of S103, above-mentioned steps S101 is specially step:
S201, the network packet that digital television server is sent to host is obtained by network data processing module.
Above-mentioned steps S104 is specially step:
S202, the network packet after Resealing is sent to IP through the Microsoft Loopback Adapter and network data processing module
The corresponding ports of address corresponding host.
In the present embodiment, network packet is read from TUN/TAP equipment first, analyzes the end in the network packet
Mouth, the corresponding protocol type in the port and protocol command, then the load data in the network packet is parsed, and according to this
The corresponding protocol type in port Reseals, and finally establishes connection according to port respective session number, according to different network protocols
The data packet after encapsulation is sent to host.
Wherein, a host can connect multiple ports, and there is an IP address in each port, and each IP address is again corresponding
There are multiple port numbers, it is the ID number communicated between condition reception and host that session number, which is used for identification port number and IP address,.
It present embodiments provides and is sent to host using the network packet that Microsoft Loopback Adapter issues digital television server
The method of corresponding ports, so that in the case where condition reception does not have true network interface card, by utilizing Microsoft Loopback Adapter in condition reception
The function that entity network interface card is realized in card, makes it possible to provide a unified standard for different CA/DRM and network application client
Interface, not only eliminated standard IO function/I O multiplexing function and Resealed, but also eliminating CA/DRM client is integrated decide through consultation
Interface processed is difficult to realize and the problem of modification process since integrator Reseals function.
Embodiment three
Fig. 3 is a kind of process of implementation method of the network interface of the offer of the embodiment of the present invention three in condition receiving card
Figure, as shown in figure 3, implementation method of the network interface provided in this embodiment in condition receiving card is including above-mentioned steps S201
On the basis of S202, above-mentioned steps S102 is specially step:
IP address, port and load data in S301, parsing network packet.
Above-mentioned steps S103 is specially step:
S302, by the load data of the identical IP address of parsing and identical port according to the corresponding protocol type in the port
Merge encapsulation.
The load data for being sent to identical IP address and identical port is merged encapsulation and is packaged by the present embodiment, is reduced
The quantity of host receiving data packet saves the time of parsing data packet, to improve the working efficiency of host.
Example IV
Fig. 4 is a kind of process of implementation method of the network interface of the offer of the embodiment of the present invention four in condition receiving card
Figure, as shown in figure 4, implementation method of the network interface provided in this embodiment in condition receiving card is including above-mentioned steps S102
On the basis of S103, above-mentioned steps S101 is specially step:
S401, the network packet that host is sent to digital television server is obtained by network data processing module.
The step is actively carried out by Microsoft Loopback Adapter, reads its received (digital television server issues) from host first
Network packet, the corresponding different port of session number, the corresponding different agreement in the port further according to the network packet
Then type decouples the load data in network packet according to different agreements and is packaged, finally by the network number after packing
It is input in TUN/TAP equipment according to packet.
Above-mentioned steps S104 is specially step:
S402, the network packet after Resealing is sent to IP through the Microsoft Loopback Adapter and network data processing module
Address corresponds to the corresponding ports of digital television server.
It present embodiments provides and the network packet of host is sent to digital television server correspondence using Microsoft Loopback Adapter
The method of port, so that in the case where condition reception does not have true network interface card, by utilizing Microsoft Loopback Adapter in condition receiving card
It realizes the function of entity network interface card, and does not need applications client change interface, can be widely applied for the transplanting of different clients.
Embodiment five
Fig. 5 is a kind of process of implementation method of the network interface of the offer of the embodiment of the present invention five in condition receiving card
Figure, as shown in figure 5, implementation method of the network interface provided in this embodiment in condition receiving card is including above-mentioned steps
It is specific further comprising the steps of on the basis of S101, S102 and S103:
S501, the connection status that digital television server is sent to host is obtained；
Above-mentioned steps S104 is specially step:
S502, the connection status that will acquire and the network packet after Resealing are sent to IP address and correspond to equipment
Corresponding ports.
Wherein, network connection state indicates that network is in connection status or closed state, the end server (server)
It can be connected with initiative Host Shutdown, state is changed after Host Shutdown connection, and condition reception periodically will obtain shape from host
State.
As optional, implementation method of the network interface in condition receiving card is further comprised the steps of:
The network connection state of host and preservation are obtained, which is that host is opened according to the connection status
Or close the state after network.
Further, which corresponds to the corresponding ports of equipment, such as the port of corresponding host, principle steps are specific
Are as follows: received (server is sent) network packet and network connection state are read from host；Network packet is torn open
Point, classifying packing is carried out according to the protocol type of session number corresponding ports；Data after packing are sent out by corresponding protocol type
Give the corresponding ports of TUN/TAP equipment.
For example according to the present embodiment usage scenario: negotiating the state of network by server and client, work as service
When device tells client to close network, client closes network according to the order, and at this time when client has data to need to carry out
When transmission, request can only be retransmitted to server, it is desirable that network opening could be continued to send by server.
The present embodiment is when network packet transmission is finished by closing the communication network control of server and client
Closed state allows server to reserve more memories, will not be because of the additional memory for occupying CPU of network connection useless.
Embodiment six
Fig. 6 is that a kind of structure of realization device of the network interface of the offer of the embodiment of the present invention four in condition receiving card is shown
It is intended to, a kind of network interface according to an embodiment of the invention is specifically described below with reference to Fig. 6 in condition receiving card
Realization device, as shown in fig. 6, realization device 100 of the network interface in condition receiving card includes:
Network packet obtains module 10, for obtaining network packet by Microsoft Loopback Adapter；
Parsing module 20, for parsing IP address and port in network packet；
Package module 30, for Resealing network packet according to the corresponding protocol type in port；
Network packet sending module 40 corresponds to equipment for the network packet after Resealing to be sent to IP address
Corresponding ports.
Wherein, which obtains module 10 and is specifically used for obtaining DTV clothes by network data processing module
Business device is sent to the network packet of host；
The network packet sending module 40 is specifically used for the network packet after Resealing through Microsoft Loopback Adapter and net
Network data processing module is sent to the corresponding port of host.
Preferably, which obtains module 10 and is specifically also used to obtain master by network data processing module
Machine is sent to the network packet of digital television server；
The network packet sending module 40 be specifically also used to the network packet after Resealing through Microsoft Loopback Adapter and
Network data processing module is sent to the corresponding port of digital television server.
Fig. 7 is a kind of structure of realization device of the network interface of example offer of the invention in condition receiving card
Schematic diagram, according to the present embodiment preferred embodiment as shown in fig. 7, realization device of the network interface in condition receiving card
100 is specific further include:
Connection status obtains module 71, the connection status for being sent to host for obtaining digital television server.
Connection status sending module 72, the connection status for will acquire are sent to the corresponding port of the host.
Further, the device further include:
Network connection state acquiring unit, for obtaining network connection state and the preservation of host, the network connection shape
State is that host opens or closes the state after network according to the connection status.
Realization device of the network interface provided in this embodiment in condition receiving card with the use of above-mentioned network by connecing
Implementation method of the mouth in condition receiving card, the function of entity network interface card is realized using Microsoft Loopback Adapter in condition receiving card, so that
The interface of a unified standard can be provided for different CA/DRM and network application client, and method provided by the invention is only
It needs to encapsulate UDP/TCP/ARP packet, has not only eliminated standard IO function/I O multiplexing function and Resealed, but also eliminated CA/DRM
Client be integrator's custom interface or due to integrator Reseal function be difficult to realize and the problem of modification process.
Implementation method of the network interface provided by the invention in condition receiving card has universal adaptability, can answer extensively
For the transplanting of different clients, received for product especially for different condition, one can be shared by transplanting different CA clients
The mature Microsoft Loopback Adapter driving of set, the network function numerous for system can be handled, and primary realize can not have to application
Client uses, and does not need applications client change interface, reduces realization difficulty, and the driving processing of Microsoft Loopback Adapter can be
Application layer exploitation, facilitates the debugging of docking application layer.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a television terminal equipment executes each reality of the present invention
Apply method described in example.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of implementation method of network interface in condition receiving card, which is characterized in that the described method includes:
Network packet is obtained by Microsoft Loopback Adapter；
Parse the IP address in the network packet and port；
The network packet is Resealed according to the corresponding protocol type in the port；
Network packet after Resealing is sent to the corresponding ports that the IP address corresponds to equipment.
2. implementation method of the network interface as described in claim 1 in condition receiving card, which is characterized in that the IP address
Corresponding equipment includes host, and the method specifically includes:
The network packet that digital television server is sent to host is obtained by network data processing module；
Network packet after Resealing is sent to the host pair through the Microsoft Loopback Adapter and network data processing module
The port answered.
3. implementation method of the network interface as claimed in claim 2 in condition receiving card, which is characterized in that the method is also
Include:
Parse the load data in the network packet；
The load data of identical IP address and identical port to parsing merges encapsulation.
4. implementation method of the network interface as described in claim 1 in condition receiving card, which is characterized in that the IP address
Corresponding equipment includes digital television server, and the method specifically includes:
The network packet that host is sent to digital television server is obtained by network data processing module；
Network packet after Resealing is sent to the number electricity through the Microsoft Loopback Adapter and network data processing module
The corresponding port depending on server.
5. such as implementation method of the described in any item network interfaces of Claims 1-4 in condition receiving card, which is characterized in that
The method also includes:
Digital television server is obtained to notify to the connection status of host；
The connection status that will acquire is sent to the corresponding port of the host.
6. implementation method of the network interface as claimed in claim 5 in condition receiving card, which is characterized in that the method is also
Include:
Obtain host network connection state and preservation, the network connection state be host opened according to the connection status or
State after closing network.
7. a kind of realization device of network interface in condition receiving card, which is characterized in that described device includes:
Network packet obtains module, for obtaining network packet by Microsoft Loopback Adapter；
Parsing module, for parsing IP address and port in the network packet；
Package module, for Resealing the network packet according to the corresponding protocol type in the port；
Network packet sending module corresponds to equipment for the network packet after Resealing to be sent to the IP address
Corresponding ports.
8. device as claimed in claim 7, it is characterised in that:
The network packet obtains module and is specifically used for obtaining digital television server transmission by network data processing module
To the network packet of host；
The network packet sending module is specifically used for the network packet after Resealing through the Microsoft Loopback Adapter and net
Network data processing module is sent to the corresponding port of the host.
9. device as claimed in claim 7, it is characterised in that:
The network packet obtains module and is specifically used for being sent to DTV by network data processing module acquisition host
The network packet of server；
The network packet sending module is specifically used for the network packet after Resealing through the Microsoft Loopback Adapter and net
Network data processing module is sent to the corresponding port of the digital television server.
10. such as the described in any item devices of claim 7 to 9, which is characterized in that described device is specific further include:
Connection status obtains module, the connection status for being sent to host for obtaining digital television server；
Connection status sending module, the connection status for will acquire are sent to the corresponding port of the host.
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| CN201511028019.8A CN105554540B (en) | 2015-12-31 | 2015-12-31 | The implementation method and device of a kind of network interface in condition receiving card |
| PCT/CN2016/085071 WO2017113617A1 (en) | 2015-12-31 | 2016-06-07 | Method and device for realizing network interface conforming to multiple client types in conditional access card |
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| CN105554540B (en) * | 2015-12-31 | 2019-04-09 | 深圳国微技术有限公司 | The implementation method and device of a kind of network interface in condition receiving card |
| CN106941616B (en) * | 2017-02-23 | 2020-02-14 | 深圳国微技术有限公司 | CAM card, multicast and repair implementation method based on CAM card and CAM card device |
| CN107026712B (en) * | 2017-03-06 | 2020-06-16 | 深圳国微技术有限公司 | Code stream transmission method and device |
| CN112118594A (en) * | 2020-08-07 | 2020-12-22 | 深圳市圣麾科技有限公司 | Data uploading method, data downloading method, electronic equipment and storage medium |
| CN113794715B (en) * | 2021-09-13 | 2023-06-30 | 福达新创通讯科技(厦门)有限公司 | Virtual point-to-point network data transmitting method and system |
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| WO2017113617A1 (en) | 2017-07-06 |
| CN105554540A (en) | 2016-05-04 |
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