CN104618200A - Universal Plug and Play (Upnp) equipment recognition method and device - Google Patents
Universal Plug and Play (Upnp) equipment recognition method and device Download PDFInfo
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- CN104618200A CN104618200A CN201410840644.1A CN201410840644A CN104618200A CN 104618200 A CN104618200 A CN 104618200A CN 201410840644 A CN201410840644 A CN 201410840644A CN 104618200 A CN104618200 A CN 104618200A
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Abstract
The invention discloses a Upnp equipment recognition method and device. The method comprises that a search end sends search instructions to network equipment at least comprising the Upnp equipment in the network; the search end receives a response data packet from the network equipment; the search end analyzes the response data packet to obtain the network equipment belonging to the Upnp equipment and the search end and Upnp equipment connection state; the search end adds information of the Upnp equipment to an equipment list of the search end when confirming the stable connection with the Upnp equipment.
Description
Technical field
The present invention relates to terminal applies technical field, particularly a kind of recognition methods of Upnp equipment and device.
Background technology
The technology realizing digital music resource-sharing is at present a lot, and based on Upnp (Universal Plugand Play, UPnP) method be a kind of wherein easier method, Upnp server and client side is only needed all to support Upnp agreement, and access in same local area network (LAN), do not need extra configuration just can realize mutual communication with operation.
But, accurately can not search the Upnp equipment in network in prior art, the Upnp equipment in network cannot be learnt.
Summary of the invention
The invention provides a kind of recognition methods and device of Upnp equipment, accurately can not search Upnp equipment in network to solve existing scheme, the problem of the Upnp equipment in network cannot be learnt.
For achieving the above object, technical scheme of the present invention is achieved in that
On the one hand, a kind of recognition methods of Upnp equipment is embodiments provided.The method comprises:
The network equipment that search end at least comprises Upnp equipment in network sends search instruction, described search instruction instruction search Upnp equipment;
Search termination receives the reply data bag from the network equipment, and described reply data bag comprises the descriptor of the network equipment;
Search for end and resolve described reply data bag, know the connection status of the network equipment and search end and this Upnp equipment belonging to Upnp equipment;
When search end confirms to keep stable connection with Upnp equipment, the information of this Upnp equipment is added in the list of devices of search end.
Another aspect, embodiments provides a kind of recognition device of Upnp equipment.This device comprises:
Transmitting element, sends search instruction for the network equipment at least comprising Upnp equipment in network, described search instruction instruction search Upnp equipment;
Receiving element, for receiving the reply data bag from the network equipment, described reply data bag comprises the descriptor of the network equipment;
Resolution unit, for resolving described reply data bag, knows the connection status of the network equipment and search end and this Upnp equipment belonging to Upnp equipment;
Maintenance unit, during for confirming to keep stable connection with Upnp equipment, adds the information of this Upnp equipment in the list of devices of search end.
The technical scheme of the embodiment of the present invention, going out on the basis of Upnp equipment based on search instruction and reply data search packet, analyze search and hold the connection status with the Upnp equipment searched out, only have when confirm search end with the Upnp equipment searched out exist stabilizing network be connected time, ability Upnp equipment is safeguarded.
As the above analysis, the embodiment of the present invention not only provides a kind of search plan of Upnp equipment, guarantee fast search to the Upnp equipment in network, and avoid network environment interference to the impact of Upnp equipment search by setting up stable connection, ensure that the stability of the list of devices of maintenance.This programme can identify the Upnp equipment in network quickly and accurately, and has stronger antijamming capability.
Accompanying drawing explanation
The method schematic diagram that Fig. 1 provides for one embodiment of the invention;
The method schematic diagram that Fig. 2 provides for another embodiment of the present invention;
The structural representation of the recognition device of a kind of Upnp equipment that Fig. 3 provides for another embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
A kind of Upnp (Universal Plug and Play that one embodiment of the invention provides, UPnP) recognition methods of equipment, can realize at client (search end), client is including, but not limited to the intelligent terminal such as mobile phone, PAD.See Fig. 1, the method comprises:
S101: the network equipment that search end at least comprises Upnp equipment in network sends search instruction.Search instruction instruction search Upnp equipment.
S102: search termination receives the reply data bag from the network equipment.This reply data bag comprises the descriptor of the network equipment.Descriptor comprises search end and knows the necessary information of the network equipment needed for Upnp equipment, as the ID, title etc. of Upnp equipment.
Mutual by the primary information of above-mentioned S101 to S102, the Upnp equipment in network can be searched out, achieve the fast search of Upnp equipment.
S103: search for end and resolve described reply data bag, knows the connection status of the network equipment and search end and this Upnp equipment belonging to Upnp equipment.
S104: when search end confirms to keep stable connection with Upnp equipment, the information of this Upnp equipment is added in the list of devices of search end.Stable connection refers to that connection status is not subject to the internetwork connection mode of network environment influence, as TCP (Transmission Control Protocol, transmission control protocol) connects.
The technical scheme of the embodiment of the present invention, going out on the basis of Upnp equipment based on search instruction and reply data search packet, analyze search and hold the connection status with the Upnp equipment searched out, only have when confirm search end with the Upnp equipment searched out exist stabilizing network be connected time, ability Upnp equipment is safeguarded.
As the above analysis, the embodiment of the present invention not only provides a kind of search plan of Upnp equipment, guarantee fast search to the Upnp equipment in network, and avoid network environment interference to the impact of Upnp equipment search by setting up stable connection, ensure that the stability of the list of devices of maintenance.This programme can identify the Upnp equipment in network quickly and accurately, and has stronger antijamming capability.
On basis embodiment illustrated in fig. 1, further, the step S101 of the present embodiment at least can adopt the process of the following two kinds mode:
Mode one,
In a search procedure, search end sends search instruction to Upnp multicast address, utilizes Upnp multicast address search instruction to be sent to Upnp equipment in network to make router.UPNP consultation is that Upnp equipment sets up a Upnp multicast group, and for router distributes a Upnp multicast address, Upnp multicast address corresponds to Upnp multicast group, and router can be positioned to the Upnp equipment in network by Upnp multicast address.
This Method compare is applicable to the more stable scene of network environment, and all Upnp equipment at this moment in network are all comprised in Upnp multicast group, can without all Upnp equipment be positioned to omitting in network by Upnp multicast address.
Mode two, in a search procedure, search end sends search instruction according to the transmission frequency preset and transmission times to router broadcast address, search instruction sent to all-network equipment in network to make router, wherein, described transmission frequency is less than frequency threshold, described transmission times is less than frequency threshold value, and the numerical value of frequency threshold and frequency threshold value can adjust as required.
Namely because this mode sends search instruction to all devices in network, in order to avoid taking too much Internet resources, affect greatly network performance, search end initiates a small amount of search instruction to router broadcast address, and the transmission frequency of command deployment instruction is lower, transmission times is less.
Adopting is can receive search instruction in order to the Upnp equipment that guarantee section is incompatible or add the failure of Upnp multicast group due to other reasons in this way, ensures to search the Upnp equipment that all needs find as far as possible, improves the accuracy rate of Upnp equipment search.
Optionally, search end sends the search instruction of the predetermined Upnp equipment of instruction search to the network equipment in network, and to make the predetermined Upnp equipment in network return reply data bag to search end, non-predetermined Upnp equipment does not return reply data bag to search end; The reply data bag only received from predetermined Upnp equipment is held in search.This mode precisely can be searched for specific Upnp equipment, and avoids unrelated equipment to return a large amount of reply data bags, reduces the data processing amount of search end.
Further, in above-mentioned steps S103, due to the descriptor of Upnp equipment can be carried in the reply data bag of Upnp equipment, but not do not have the information that Upnp is relevant in the reply data bag of Upnp equipment, so to the parsing of content in reply data bag, search end is by knowing which equipment belongs to Upnp equipment.When knowing that equipment belongs to Upnp equipment, search end detects the connection status (as whether being TCP connected mode) of self and this Upnp equipment again.Concrete, when detecting connection status, whether the detection of search end self sets up effective TCP with Upnp equipment is connected.
Search end according to the connection status of Upnp equipment know search end with this Upnp equipment set up effective TCP is connected time, confirmation and Upnp equipment keep stablize be connected;
Search end according to the connection status of Upnp equipment know search end do not set up with this Upnp equipment TCP is connected time, initiate to be connected with the TCP of this Upnp equipment, after TCP connection establishment is successful, confirmation and Upnp equipment keep stablizing and are connected.
To be connected by search end the Upnp equipment making to search out with the TCP between Upnp equipment to be not easy to be subject to the impact of network environment and to lose.
Further, after above-mentioned steps S104, the present embodiment additionally provides a kind of plant maintenance scheme, and every the predetermined detection time, whether search end detects the Upnp equipment searched out normal.Specifically comprise: search end sends IMAP (Internet Message Access Protocol, Interactive Mail Access Protocol) packet every the IP address of the Upnp equipment that the scheduled time records in list of devices.The various information of the Upnp equipment that list of devices meeting record searching goes out, title, numbering, ID, IP address etc. as Upnp comprise the various information of descriptor.
The present embodiment adopts IMAP packet to carry out equipment Inspection.IMAP packet and Upnp have nothing to do, and have platform-neutral, and can reduce the complexity of Upnp relevant portion.
When search termination receives the response that secondary IP address returns, confirm that this IP address exists Upnp equipment, when search end does not receive the response that secondary IP address returns, confirm the Upnp device losses under this IP address.Under the scene that network environment is more stable, when detecting, as long as IP address responds the IMAP packet that search end sends, can think that the Upnp equipment under this IP address exists.
Further embodiment of this invention performs secondary detection and confirms on the basis of above-mentioned detection, see Fig. 2, specifically comprises:
S201: search end determines that detection time arrives, and initiating equipment detects.
The time interval between two test points can set as required.
S202: search holds the IP address of the Upnp equipment recorded in current device list to send IMAP packet.
S203: search element end and judge whether to receive the response that secondary IP address returns, if so, enter step S204, if not, enter step S205.
S204: search end initiates calling of Upnp functional interface to the network equipment under this IP address, enters S206.
S205: when search end does not receive response, confirm unit exception, device losses, enters S207.
After S205, before performing S207, S202 can also be returned, when search end confirms the Upnp device losses under this IP address, again send search instruction to the network equipment in network, guarantee the Upnp equipment can not omitted in network further, if also do not find the Upnp equipment under IP address under new search routine, confirm Upnp device losses again, enter S207.
S206: when search end calls the success of Upnp functional interface, or when search for termination receive malloc failure malloc information instruction Upnp equipment exist time, confirm that this IP address exists Upnp equipment, return S202, prepare when arriving next detection time, actuating equipment detects again.The interface called is the selected interface of Upnp equipment, and the attribute of this Upnp functional interface is: can successfully call this functional interface to all normal Upnp equipment, but cannot call this functional interface to non-Upnp equipment.
When search end calls Upnp functional interface time-out, or (even if Upnp equipment exists sometimes during the feedback information called Upnp functional interface that receives of search termination information non-existent for feedback Upnp equipment, also may occur calling unsuccessful situation due to reasons such as network environments), confirm the Upnp device losses under this IP address, enter S205.When Upnp equipment and an IP address disconnect, record can be carried out to the state that this Upnp equipment leaves this IP address in network, when then search end sends IMAP packet, network (router as in network) can according to the information recorded in network, to search end feedback, inform that search end Upnp equipment is not present in.
S207: search end will be determined to lose or the Upnp equipment of exception removes from the list of devices safeguarded, the in esse Upnp equipment in the information of the Upnp equipment that search end is known and network is consistent, the accuracy of guarantee list of devices.
In the testing process shown in Fig. 2, first first carry out primary screening by S203, then called by functional interface and carry out secondary-confirmation.If do not utilize IMAP packet to carry out primary screening directly to call Upnp functional interface and carry out actuating equipment and detect, then can only wait for interface interchange time-out after unit exception, detection time is longer, and can not abnormal to determine whether that equipment occurs abnormal according to time-out.If network environment is more stable, then only needs the original IP of checkout equipment whether to return response and can judge Upnp equipment whether normal presence, namely do not need the confirmation of second step.
An application scenarios of this programme can be home network.Home network comprises: for the acquisition of media archives, record, storage and DMS (the Digital Media Server as source, digital media server), for finding and playing or export DMP (the Digital Media Player of any media archives provided by DMS, digital media player), and DMC (Digital MediaController, digital media controller), it uses as remote control, the multi-medium file on DMS can be found, and specify and can the DMR of play multimedia archives carry out playing or control the device that DMS was uploaded or downloaded to multi-medium file.Can also comprise in home network: for receiving and playing DMR (the Digital Media Renderer pushing the media archives that (push) comes from DMC, digital media renderer), the DMPr (Digital MediaPrinter, digital media printer) of printing function can be provided under the DLNA network architecture.Under this network architecture, usually adopt DMC as search end, DMR, DMP under other Upnp agreements and audio amplifier, TV etc. in network can adopt this programme to identify and manage by searched end.
Another application scenarios of this programme can be mobile network.Mobile network comprises: M-DMS (Mobile Digital Media Server, mobile digital media server), its for less for mobile phone equal-volume, lightly can server set by the electronic installation of mobile, multimedia form and general DMS slightly different; M-DMP (Mobile Digital Media Player, mobile digital media player): it is the player for running gear equally, multimedia form and general DMP slightly different; M-DMU (Mobile Digital Media Uploader, mobile digital media uploads controller): archives can upload onto the server by it, play to player for server share; M-DMD (Mobile Digital MediaDownloade, mobile digital media downloading controller): the archives on server download on device by it; M-DMC (Mobile Digital Media Controller, mobile digital media controller): its function is identical with DMC.Under this network architecture, usually adopt M-DMC as search end, M-DMD, M-DMP etc. under other Upnp agreements can adopt this programme to identify and manage by searched end.
In this programme, search is held to the scene switched between different type network, when searching for end and switching in new network, the facility information in the former network preserved in list of devices is deleted.Search end re-executes search and the maintenance of Upnp equipment in a new network.
Another embodiment of the present invention provides a kind of recognition device of Upnp equipment, and see Fig. 3, this device 300 comprises:
Transmitting element 310, sends search instruction for the network equipment at least comprising Upnp equipment in network, described search instruction instruction search Upnp equipment;
Receiving element 311, for receiving the reply data bag from the network equipment, described reply data bag comprises the descriptor of the network equipment;
Resolution unit 312, for resolving described reply data bag, knows the connection status of the network equipment and search end and this Upnp equipment belonging to Upnp equipment;
Maintenance unit 313, during for confirming to keep stable connection with Upnp equipment, adds the information of this Upnp equipment in the list of devices of search end.
Concrete, transmitting element 310, in a search procedure, sends search instruction to Upnp multicast address, utilizes Upnp multicast address search instruction to be sent to Upnp equipment in network to make router.
Or transmitting element 310, in a search procedure, sends search instruction according to the transmission frequency preset and transmission times to router broadcast address, search instruction sent to all-network equipment in network to make router; Wherein, described transmission frequency is less than frequency threshold, and described transmission times is less than frequency threshold value.
When maintenance unit 313 knows that search end is connected with the built vertical TCP of this Upnp equipment according to the connection status of Upnp equipment, confirm that keep stable is connected with Upnp equipment; According to the connection status of Upnp equipment know search end do not set up with this Upnp equipment TCP is connected time, initiate to be connected with the TCP of this Upnp equipment, after TCP connection establishment is successful, confirmation and Upnp equipment keep stablizing and are connected.
Maintenance unit 313 also sends IMAP packet for the IP address of the Upnp equipment recorded in list of devices every the scheduled time; When receiving the response that secondary IP address returns, confirm that this IP address exists Upnp equipment, when search end does not receive the response that secondary IP address returns, confirm the Upnp device losses under this IP address.Concrete, after maintenance unit 313 receives the response that secondary IP address returns, calling of Upnp functional interface is initiated to the network equipment under this IP address, when calling successfully when Upnp functional interface or exist when malloc failure malloc information instruction Upnp equipment, confirm that this IP address exists Upnp equipment, when Upnp functional interface calls time-out or the non-existent information of feedback Upnp equipment, confirm the Upnp device losses under this IP address.And, when maintenance unit 313 confirms the Upnp device losses under this IP address, again send search instruction to the network equipment in network.In addition, when maintenance unit 313 confirms the Upnp device losses under this IP address, the Upnp equipment of loss is deleted from list of devices.
Further, the facility information in the former network preserved in list of devices, when searching for end and switching in new network, is deleted by maintenance unit 313.
Device 300 can be arranged on DMC, M-DMC, mobile phone or PC etc.The specific works mode of each unit in apparatus of the present invention embodiment, see the related content of the inventive method embodiment, can not repeat them here.
The technical scheme of the embodiment of the present invention, going out on the basis of Upnp equipment based on search instruction and reply data search packet, analyze search and hold the connection status with the Upnp equipment searched out, only have when confirm search end with the Upnp equipment searched out exist stabilizing network be connected time, ability Upnp equipment is safeguarded.
As the above analysis, the embodiment of the present invention not only provides a kind of search plan of Upnp equipment, guarantee fast search to the Upnp equipment in network, and avoid network environment interference to the impact of Upnp equipment search by setting up stable connection, ensure that the stability of the list of devices of maintenance.This programme can identify the Upnp equipment in network quickly and accurately, and has stronger antijamming capability.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. a recognition methods for Upnp equipment, is characterized in that, described method comprises:
The network equipment that search end at least comprises general plug-and-play protocol Upnp equipment in network sends search instruction, described search instruction instruction search Upnp equipment;
Search termination receives the reply data bag from the network equipment, and described reply data bag comprises the descriptor of the network equipment;
Search for end and resolve described reply data bag, know the connection status of the network equipment and search end and this Upnp equipment belonging to Upnp equipment;
When search end confirms to keep stable connection with Upnp equipment, the information of this Upnp equipment is added in the list of devices of search end.
2. method according to claim 1, is characterized in that,
In a search procedure, search end sends search instruction to Upnp multicast address, utilizes Upnp multicast address search instruction to be sent to Upnp equipment in network to make router.
3. method according to claim 1, is characterized in that,
In a search procedure, search end sends search instruction according to the transmission frequency preset and transmission times to router broadcast address, search instruction is sent to all-network equipment in network to make router;
Wherein, described transmission frequency is less than frequency threshold, and described transmission times is less than frequency threshold value.
4. method according to claim 1, is characterized in that,
When search end knows that search end is connected with the built vertical TCP of this Upnp equipment according to the connection status of Upnp equipment, confirm that keep stable is connected with Upnp equipment;
Search end according to the connection status of Upnp equipment know search end do not set up with this Upnp equipment TCP is connected time, initiate to be connected with the TCP of this Upnp equipment, after TCP connection establishment is successful, confirmation and Upnp equipment keep stablizing and are connected.
5. method according to claim 1, is characterized in that, also comprises:
Search end sends IMAP packet every the IP address of the Upnp equipment that the scheduled time records in list of devices;
When search termination receives the response that secondary IP address returns, confirm that this IP address exists Upnp equipment, when search end does not receive the response that secondary IP address returns, confirm the Upnp device losses under this IP address.
6. method according to claim 5, is characterized in that, described method also comprises:
After search termination receives the response that secondary IP address returns, calling of Upnp functional interface is initiated to the network equipment under this IP address, when calling successfully when Upnp functional interface or exist when malloc failure malloc information instruction Upnp equipment, confirm that this IP address exists Upnp equipment, when Upnp functional interface calls time-out or the non-existent information of feedback Upnp equipment, confirm the Upnp device losses under this IP address.
7. the method according to any one of claim 5 or 6, is characterized in that, also comprise:
When search end confirms the Upnp device losses under this IP address, again send search instruction to the network equipment in network.
8. the method according to claim 4 or 5, is characterized in that, also comprises:
When search end confirms the Upnp device losses under this IP address, the Upnp equipment of loss is deleted from list of devices.
9. method according to claim 1, is characterized in that,
Search end sends the search instruction of the predetermined Upnp equipment of instruction search to the network equipment in network, and to make the predetermined Upnp equipment in network return reply data bag to search end, non-predetermined Upnp equipment does not return reply data bag to search end;
The reply data bag only received from predetermined Upnp equipment is held in search.
10. a recognition device for Upnp equipment, is characterized in that, described device comprises:
Transmitting element, sends search instruction for the network equipment at least comprising Upnp equipment in network, described search instruction instruction search Upnp equipment;
Receiving element, for receiving the reply data bag from the network equipment, described reply data bag comprises the descriptor of the network equipment;
Resolution unit, for resolving described reply data bag, knows the connection status of the network equipment and search end and this Upnp equipment belonging to Upnp equipment;
Maintenance unit, during for confirming to keep stable connection with Upnp equipment, adds the information of this Upnp equipment in the list of devices of search end.
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| CN108540590A (en) * | 2018-03-28 | 2018-09-14 | 深圳市网心科技有限公司 | UPnP network port mapping method, electronic equipment, network system and storage medium |
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