CN100456805C - A network upgrade method of the TFTP-based IPTV STB software - Google Patents
A network upgrade method of the TFTP-based IPTV STB software Download PDFInfo
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- CN100456805C CN100456805C CNB2006100112977A CN200610011297A CN100456805C CN 100456805 C CN100456805 C CN 100456805C CN B2006100112977 A CNB2006100112977 A CN B2006100112977A CN 200610011297 A CN200610011297 A CN 200610011297A CN 100456805 C CN100456805 C CN 100456805C
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Abstract
The disclosed network upgrading method for IPTV set-top box (STB) software based on TFTP comprises: during loading Boot Loader, selected downloading the upgrade program through TFTP server-client mode; after identifying validity, automatic upgrading the STB. This invention can prolong the service time of STB, reduces system cost, and provides better service for user.
Description
Technical field
The present invention relates to Web TV (IPTV) system, specially refer to the renewal of terminal set top box device software in emerging service pattern that computer broadband network, multi-medium data service are combined and the IPTV system.
Background technology
The IPTV system is exactly the said network television systems of people, and it is a kind of modern high technology broadcasting media system that traditional TV is combined with broadband network technology.It changes the operation way of passive, the one-way transmission of traditional tv, by means of unimpeded broadband internet technology, innovation ground with audience interaction be incorporated into TV programme view and admire with selection course in, its interactive range of choice and the independence of people of having expanded greatly to TV programme, these are undoubtedly the attraction to user's maximum, so, application prospect a slice light.
Consider the generality of existing conventional television, in the IPTV system, final display device still adopts traditional television set, and therefore translation interface equipment, i.e. a set-top box must be arranged between transmission network and television set.Set-top box is the important component part of IPTV system, it is positioned at household internal, with common TV as display device, with remote controller as user input device, can receive the media data of Network Transmission, and decoding plays and to be shown to television set and to watch for the user, simultaneously embedded function menu and browser, the user can click control by remote controller, realizes the reception broadcast of Web TV and user's interaction selection.
For a set-top box, after finishing design and producing, the version of hardware is constant with regard to basic fixed, and the realization of its various function mainly is to realize by the software that is solidificated in the set-top box, comprises that authentification of user, program choosing are broadcast, audience interaction or the like.Along with development of internet technology, spectators to the variation of program and demand for services and to the solution of variety of issue in the reality operation, the continuous maturation and the development of IPTV technology impelled in the capital, also will force set-top box to realize the updating of function, perfect by software upgrading.But for being positioned over set-top box in the users family early stage, how convenient and reliable carries out software upgrading to it, to adapt to new service request, is exactly a very crucial and urgent problem.
Summary of the invention
After the objective of the invention is to overcome set-top box and entering subscriber household in a large number, software is difficult for the defective upgraded, thereby a kind of network update method of set-top box software is provided.
To achieve these goals, the invention provides a kind of IPTV set-top box software network updating method, may further comprise the steps based on TFTP:
1), behind the set-top-box opening, load to start and download, this program initialization top-set hardware, and start upgrading and detect;
2), judge whether the Application in Set Top Box program complete, if complete, carry out next step, otherwise, jump to step 4);
3), the state of the upgrading permission control word in downloading according to startup, judge whether the software in the set-top box allows online upgrading, as if doing online upgrading, then carry out next step, otherwise, jump to step 13);
4), set-top box receives network parameter information from Dynamic Host Configuration Protocol server, according to this information setting set-top box self networks parameter, if be provided with successful execution next step, otherwise the interrupt software escalation process jumps to step 13);
5), set-top box is connected to dns server according to the network parameter that step 4) obtains, from dns server, resolve and obtain tftp server address, if success is then carried out next step, otherwise, jump to step 7);
6), after set-top box obtains tftp server address that dns server returns, send request, realize being connected, as if successful connection execution in step 8 with the UDP of tftp server to tftp server), otherwise the process that interrupt software is upgraded jumps to step 13);
7), use the tftp server address of set-top box acquiescence, be connected on the tftp server, if successful connection execution in step 8), otherwise the process of interrupt software upgrading jumps to step 13);
8), set-top box downloads upgrading configuration from tftp server, if download successfully, then carries out next step, otherwise, jump to step 13);
9), decipher the upgrading configuration of being downloaded, do legitimacy authentication and information analysis, judge whether application software in the needs upgrading set top box according to the result who resolves, if need, then from upgrading configuration, obtain wanting the title of upgrading software, carry out next step then, otherwise, jump to step 13);
10), the upgrade file of set-top box downloading application software from the tftp server, download and successfully then carry out next step, otherwise, jump to step 13);
11), the upgrade file of using software is done deciphering and legitimacy authentication,, then carry out next step if file is legal, otherwise, jump to step 13);
12), with legal upgrade file programming in set-top box, substitute original application software;
13), judge whether the application software after the upgrading complete, if complete, carry out next step, otherwise, jump to step 15);
14), finish escalation process, startup application software, set-top box operate as normal;
15), show the miscue picture, remind the user to restart set-top box or get in touch with operator.
In the technique scheme, in described step 4), described network parameter information comprises IP address information, gateway address information, subnet mask and dns server information.
In the technique scheme, described upgrading configuration is encrypted it with the private key of oneself by the set-top box software provider before Network Transmission, in described step 9), described set-top box is deciphered it with the PKI that is solidificated in the set-top box software provider of described startup in downloading; Described upgrading configuration comprises the version information of set-top box software, and by the version information of comparison set-top box software and the version information of the set-top box software in the upgrading configuration, whether decision wants upgrade application software.
In the technique scheme, the upgrade file of described application software adopts double secret key mechanism to realize the encrypt and decrypt of software, the upgrade file of application software is before Network Transmission, at first with the private key of oneself it is encrypted by the set-top box software provider, file after the encryption offers operator, with the private key of oneself file is done encryption by operator then, form the upgrade file after finally encrypting, after set-top box is received upgrade file after the final encryption, at first encrypt file is done once deciphering with being solidificated in the PKI that starts the operator in downloading, with being solidificated in the PKI that starts the set-top box software provider in downloading file is done the secondary deciphering then, finally obtain the upgrade file of original application software.
In the technique scheme, in described step 9), described legitimacy authentication is to check whether the upgrading configuration of being downloaded is correct; In described step 11), described legitimacy authentication is to check whether the upgrade file of the application software of being downloaded is correct.
Utilize the IPTV set-top box software network updating method based on TFTP of the present invention, can carry out convenient and reliable software network upgrading to the key equipment set-top box of IPTV system, thereby make user side's set-top box can adapt to the requirement of the function of IPTV system continual renovation all the time, prolong the life cycle of set-top box, reduce the IPTV system and use operation cost, better meet user's request.
Description of drawings
Fig. 1 is the bind mode figure of IPTV system;
Fig. 2 is the flow chart of the IPTV set-top box software network updating method based on TFTP of the present invention;
Fig. 3 is legal upgrade file generative process schematic diagram.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Before set-top box software network updating method of the present invention is described, at first the IPTV system is described.Fig. 1 is the bind mode figure of IPTV system, and the set-top box of IPTV system subscriber terminal utilizes network to be connected with Dynamic Host Configuration Protocol server, dns server, the tftp server of system server terminal.
Described Dynamic Host Configuration Protocol server is used for to network parameters such as set-top box transmission IP address information, gateway address information, subnet mask, dns server informations.
Described dns server sends the IP address of upgrade file place tftp server to set-top box.
Described tftp server is used to move tftp server software and deposits required downloaded files, and required downloaded files comprises upgrading configuration and application program updating file.Described TFTP is the abbreviation of TrivialFile Transfer Protocol, and it is a kind of a kind of agreement that realizes less file transfer that connects based on UDP.The TFTP agreement is simple, fast, do not need the authority of Authentication Client, very suitable embedded system and have the system of requirement to carry out file transfer to speed.
Comprise in the described set-top box and watch the necessary software of Web TV, wherein, comprise one section independent small routine-startup download (hereinafter to be referred as Boot Loader).This program is operation before system software operation, utilizes this section small routine, can initiating hardware equipment, set up the mapping graph of memory headroom, thus take the hardware environment of system to operating state, then application software is called in internal memory and start and carry out.The realization of Boot Loader depends on the architecture of CPU, and most of Boot Loader are divided into stage1 and stage2 two large divisions.Depend on the code of CPU architecture,, all be placed on usually among the stage1, and all realize usually with assembler language such as device initialize code etc.Stage2 then realizes can realize complicated function like this, and code can having better readability and portability usually with the C language.
Because TFTP agreement itself does not need authentication,, need do the encryption and decryption operation to upgrading configuration and application software upgrade file in order to ensure the legitimacy and the accuracy of upgrading configuration that is transmitted in the escalation process and application software upgrade file.In the present invention, adopt double secret key mechanism to realize the encryption and decryption of file.Described double secret key mechanism is meant, the set-top box software provider provides the key Core Generator to operator, operator utilizes this key Core Generator to generate the private key key_operator_d and the PKI key_operator_e of operator, and the PKI that obtains sent to the set-top box software provider, join by the set-top box software provider among the Boot Loader of set-top box.Same, the set-top box software provider utilizes the key Core Generator to generate set-top box software provider's private key key_manufacture_d and PKI key_manufacture_e.PKI key_manufacture_e also is solidificated among the Boot Loader.
As shown in Figure 3, the upgrade file of application software and upgrading configuration are before transmission, at first utilize the private key key_manufacture_d of self to encrypt the upgrade file of application software by the set-top box software provider, upgrade file after the encryption sends to operator with the upgrading configuration that comprises version information, operator utilizes the private key key_operator_d of self that upgrading configuration is encrypted, and the upgrade file of encrypted applications software is carried out the second time encrypt, be kept at last under the catalogue of tftp server.
As shown in Figure 2, set-top box software network updating method of the present invention specifically may further comprise the steps:
Behind step 10, the set-top-box opening, load Boot Loader, Boot Loader initiating hardware, and start the upgrading detection.
Step 20, judge whether the Application in Set Top Box program is complete,, carry out next step if complete, otherwise, jump to step 40.
Step 30, according to the state of the upgrading among Boot Loader permission control word, judge whether the software in the set-top box allows online upgrading, as if doing online upgrading, then carry out next step, otherwise, jump to step 130.
Step 40, set-top box receive network parameter information from Dynamic Host Configuration Protocol server, according to this information setting set-top box self networks parameter, if be provided with successful execution next step, otherwise the interrupt software escalation process jumps to step 130.
In this step, set-top box sends the discovering message of DHCP by network, message of feedback was given set-top box after Dynamic Host Configuration Protocol server was received message, set-top box is received to send clearly to Dynamic Host Configuration Protocol server behind this message again and is asked, Dynamic Host Configuration Protocol server receives the back and sends a response to set-top box, critical network parameters such as the IP address information of giving set-top box, gateway address information, subnet mask, dns server information have been comprised in this response, after set-top box receives the response of Dynamic Host Configuration Protocol server, according to the network parameter of the information setting oneself that comprises in the response.
Step 50, set-top box are connected to dns server by the network parameter that step 40 obtains, and resolve from dns server and obtain tftp server address, and promptly if next step successful, is then carried out in the address of upgrade server, otherwise, jump to step 70.
Step 60, set-top box send request to tftp server after obtaining upgrade server address that dns server returns, realize being connected with the UDP of tftp server, if successful connection execution 80, otherwise the process that interrupt software is upgraded jumps to step 130.
Step 70, the tftp server address that uses set-top box to give tacit consent to are connected on this server, if successful connection execution in step 80, otherwise the process of interrupt software upgrading jumps to step 130.
Step 80, set-top box are downloaded upgrading configuration from tftp server, if download successfully, then carry out next step, otherwise, jump to step 130
The upgrading configuration that step 90, deciphering are downloaded is done legitimacy authentication and information analysis, judges whether needs upgrade application software according to the result who resolves, if need, then from upgrading configuration, obtain wanting the title of upgrading software, carry out next step then, otherwise, jump to step 130.
After set-top box is downloaded upgrading configuration from tftp server, with the PKI key_operator_e of operator that is solidificated among the Boot Loader upgrading configuration after encrypting is deciphered, obtain upgrading configuration.Analyze upgrading configuration then, the information that comprises in the upgrading configuration and soft, the hardware information of set-top box are contrasted, if information matches, then the upgrading configuration downloaded of explanation and current set-top box are complementary, otherwise, abandon the upgrading configuration of having downloaded.The version number of application software current in software version number in the upgrading configuration and the set-top box is made comparisons,, then from upgrading configuration, obtain the filename of the upgrade file that needs download if the software version number in the upgrading configuration is higher.
The upgrade file of step 100, set-top box downloading application software from the tftp server is downloaded and is successfully then carried out next step, otherwise, jump to step 130.
Step 110, the upgrade file of using software is done deciphering, carry out the legitimacy authentication then,, then carry out next step if file is legal, otherwise, jump to step 130.
In this step, when the upgrade file of using software is done deciphering, at first utilize among the Boot Loader of set-top box with the PKI key_operator_e of operator carry out the deciphering of ground floor, with being solidificated in the PKI key_manufacture_e that the set-top box software provider among the BootLoader provided the upgrade file of using software is done the deciphering of the second layer then, thereby obtain original application program updating file.Doing legitimacy when check, will check the correctness of upgrade file exactly, prevented to download wrong upgrade file or the upgrade file downloaded imperfect.
Step 120, with legal upgrade file programming in set-top box, substitute original application software.
Step 130, judge whether application program is complete,, carry out next step if complete, otherwise, jump to step 150.
Step 140, end escalation process start application software, the set-top box operate as normal.
Step 150, demonstration miscue picture, the prompting user restarts set-top box or gets in touch with operator.
Below in conjunction with specific embodiment, method of the present invention is further described.
Postulated mechanism set-top box hardware model is BV2-A3N, going out business men is DSP/IOA, wherein the IPTV system software type of Gu Huaing is 1.9.0 for BV2-01N version number, and the version number of the corresponding more recent application software of operator is 1.9.1, upgrading permission control word in the set-top box is for allowing upgrade status, the broadband network that set-top box connects is normal, Dynamic Host Configuration Protocol server in the network, dns server and tftp server are working properly, pairing upgrading configuration BV2A3N.BV201N.CFG and through the software provider, the IPTV operator is approved respectively and the application software upgrade file BV2A3N.BV201N.ROMFS.STAGE2 that issues all correctly is kept under the service catalogue of TFTP.
After set-top-box opening powers on, enter and carry out the Boot Loader stage, after initialization finished, the mixed-media network modules mixed-media of set-top box began following steps:
1.1 detect the state of upgrading permission control word, allow online upgrading;
1.2 set-top box is sent the discovering message of DHCP to network by network interface card, DHCP clothes device feeds back a message rapidly to set-top box after receiving message, after receiving, set-top box sends the request request to Dynamic Host Configuration Protocol server, give a response after receiving behind the Dynamic Host Configuration Protocol server, critical network parameters such as the IP address letter of giving set-top box opens, gateway address information, subnet mask, dns server information have been comprised in this response, after set-top box receives the response of Dynamic Host Configuration Protocol server, according to the network parameter of the information setting oneself that comprises in the response;
1.3 set-top box is by the Dynamic Host Configuration Protocol server addresses distributed, judge whether that according to subnet mask needs send the upgrade server domain name of oneself giving tacit consent to by gateway to dns server, the request dns server is resolved the address of upgrade file server, and dns server returns to set-top box according to the upgrade service domain name that set-top box sends over the upgrade server address that parses;
1.4 set-top box judges whether that according to subnet mask needs are connected with the UDP of tftp server to the tftp server request by gateway after obtaining upgrade server address that dns server returns;
1.5TFTP server produces response, set-top box is from tftp server download and upgrade configuration file BV2A3N.BV201N.CFG;
1.6 set-top box is analyzed downloading the upgrading configuration of coming, whether information that comprises in the contrast upgrading configuration and the hardware and software information of self mate, contrast the height of version number and self current version number of application software then, find that the software version number in the upgrading configuration is higher, from upgrading configuration, obtain the filename of required download and upgrade file, that is: BV2A3N.BV201N.ROMFS.STAGE2;
1.7 set-top box is from tftp server download and upgrade file BV2A3N.BV201N.ROMFS.STAGE2, this moment screen on software for display upgrade tip picture, carry out the verification of key verification and upgrade file correctness after downloading successfully, verification correctly begins the flash of cure applications program software is carried out erasable operation;
1.8 after erasable operation was finished, application software was upgraded successfully;
1.9 show on the screen that set-top box copies the application software that has cured among the RAM to, begins to start application program, until entering into log-in interface just at the hint image of load software.
In the process of updating set-top box software, also exist following reason, make that software upgrading can not be successful.
1) in step 1.2, if upgrading permission control word is not allow upgrade status, then directly jump to step 1.9, carry out the process that starts application software;
2) in step 1.2, if Dynamic Host Configuration Protocol server is not to set-top box response (comprising any one in discovering request and the request request), show that so upgrade of network is undesired at this moment, after set-top box is returned a fail values to ROMPaq, directly jump to step 1.9, carry out the process that starts application software;
3) in step 1.5, if tftp server does not produce response or do not find corresponding upgrading configuration BV2A3N.BV201N.CFG, behind retry three times, directly jump to step 1.9 so, carry out the process that starts application software;
4) in step 1.6, if hard, the soft information that from the upgrading configuration BV2A3N.BV201N.CFG that downloads, analyzes and the hardware and software information of set-top box self does not match or the version number of application software is not more than presently used application software version number, directly jump to step 1.9, carry out the process that starts application software;
5) in step 1.7, if application software upgrade file BV2A3N.BV201N.ROMFS.STAGE2 failed download (comprise do not find in corresponding upgrade file or the downloading process unexpected interrupt) or downloads successfully after carry out key verification less than by or when carrying out the file integrality inspection and not passing through, just can not carry out erasable process to flash, directly jump to step 1.9, carry out the process that starts application software.
In addition, also exist some abnormal conditions:
A, in step 1.3, if dns server breaks down, can't parse the address of upgrade server, then enable the upgrade server address of set-top box acquiescence, continue step 1.4;
B, in step 1.5, if tftp server breaks down, produce response, behind retry three times, directly jump to step 1.9 so, carry out the process that starts application software;
C, in step 1.7, if in application software upgrade file BV2A3N.BV201N.ROMFS.STAGE2 downloading process unexpected the interruption, can after attempting connecting three times again, directly jump to step 1.9 so, carry out the process that starts application software;
D, in step 1.7, if unexpected power down in to the erasable process of flash, so whole application software will be destroyed fully, the state of the permission control word of no matter upgrading after powering on again, all be bound to enter into the online upgrading process, " software damage " occur if upgrading is unsuccessful and show, prompting customer contact operator solves.
Claims (5)
1, a kind of IPTV set-top box software network updating method based on TFTP may further comprise the steps:
1), behind the set-top-box opening, load to start and download, this program initialization top-set hardware, and start upgrading and detect;
2), judge whether the Application in Set Top Box program complete, if complete, carry out next step, otherwise, jump to step 4);
3), the state of the upgrading permission control word in downloading according to startup, judge whether the software in the set-top box allows online upgrading, as if doing online upgrading, then carry out next step, otherwise, jump to step 13);
4), set-top box receives network parameter information from Dynamic Host Configuration Protocol server, according to this information setting set-top box self networks parameter, if be provided with successful execution next step, otherwise the interrupt software escalation process jumps to step 13);
5), set-top box is connected to dns server according to the network parameter that step 4) obtains, from dns server, resolve and obtain tftp server address, if success is then carried out next step, otherwise, jump to step 7);
6), after set-top box obtains tftp server address that dns server returns, send request, realize being connected, as if successful connection execution in step 8 with the UDP of tftp server to tftp server), otherwise the process that interrupt software is upgraded jumps to step 13);
7), use the tftp server address of set-top box acquiescence, be connected on the tftp server, if successful connection execution in step 8), otherwise the process of interrupt software upgrading jumps to step 13);
8), set-top box downloads upgrading configuration from tftp server, if download successfully, then carries out next step, otherwise, jump to step 13);
9), decipher the upgrading configuration of being downloaded, do legitimacy authentication and information analysis, judge whether application software in the needs upgrading set top box according to the result who resolves, if need, then from upgrading configuration, obtain wanting the title of upgrading software, carry out next step then, otherwise, jump to step 13);
10), the upgrade file of set-top box downloading application software from the tftp server, download and successfully then carry out next step, otherwise, jump to step 13);
11), the upgrade file of using software is done deciphering and legitimacy authentication,, then carry out next step if file is legal, otherwise, jump to step 13);
12), with legal upgrade file programming in set-top box, substitute original application software;
13), judge whether the application software after the upgrading complete, if complete, carry out next step, otherwise, jump to step 15);
14), finish escalation process, startup application software, set-top box operate as normal;
15), show the miscue picture, remind the user to restart set-top box or get in touch with operator.
2, the IPTV set-top box software network updating method based on TFTP according to claim 1, it is characterized in that, in described step 4), described network parameter information comprises IP address information, gateway address information, subnet mask and dns server information.
3, the IPTV set-top box software network updating method based on TFTP according to claim 1, it is characterized in that, described upgrading configuration is encrypted it with the private key of oneself by the set-top box software provider before Network Transmission, in described step 9), described set-top box is deciphered it with the PKI that is solidificated in the set-top box software provider of described startup in downloading; Described upgrading configuration comprises the version information of set-top box software, and by the version information of comparison set-top box software and the version information of the set-top box software in the upgrading configuration, whether decision wants upgrade application software.
4, IPTV set-top box software network updating method based on TFTP according to claim 1, it is characterized in that, the upgrade file of described application software adopts double secret key mechanism to realize the encrypt and decrypt of software, the upgrade file of application software is before Network Transmission, at first with the private key of oneself it is encrypted by the set-top box software provider, file after the encryption offers operator, with the private key of oneself file is done encryption by operator then, form the upgrade file after finally encrypting, after set-top box is received upgrade file after the final encryption, at first encrypt file is done once deciphering with being solidificated in the PKI that starts the operator in downloading, with being solidificated in the PKI that starts the set-top box software provider in downloading file is done the secondary deciphering then, finally obtain the upgrade file of original application software.
5, the IPTV set-top box software network updating method based on TFTP according to claim 1 is characterized in that, in described step 9), described legitimacy authentication is to check whether the upgrading configuration of being downloaded is correct; In described step 11), described legitimacy authentication is to check whether the upgrade file of the application software of being downloaded is correct.
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