CN102801825A - Terminal multiple IP (Internet Protocol) address validity detection method - Google Patents
Terminal multiple IP (Internet Protocol) address validity detection method Download PDFInfo
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Abstract
The invention discloses a terminal multiple IP (Internet Protocol) address validity detection method which comprises the following steps: a client sends a first request message to a server and registers all available IP addresses of a native machine to the server; and the server generates a second request message according to the the first request message sent by the client and sends the second request message to the client by respectively using each IP address listed in the first request message as a target address, the corresponding IP addresses are effective if response of the client to the second request message in second preset time, or the corresponding IP addresses are invalid. Due to the adoption of the terminal multiple IP address validity detection method, the real-time detection and maintenance of reachable states of the IP address of the client are implemented, the server can be ensured to timely and efficiently acquire a plurality of effective and reachable IP addresses of the client and the feasible foundation is provided for an application program to utilize a plurality of IP addresses to promote the transmission capacity, the stability and the reliability.
Description
Technical field
The present invention relates to the internet transmission technical field, the IP address validity detection method under particularly a kind of Client/Server traffic model with many IP End of Address.
Background technology
In recent years; Along with development of internet technology; The continuous enhancing of terminal capability, IPv6 network increasingly mature, increasing terminal has a plurality of available IP addresses; For example the notebook of main flow disposes at least one Ethernet card and a wireless network card at present, all can obtain the IP address through these two network interface cards; In addition, in the IPv6 environment, one is had only the terminal of an interface also can have a plurality of available IPv6 addresses simultaneously.
It is that Network Transmission has been brought huge advantage that the terminal has many IP address, and how current research focus also around utilizing the benefit that multiaddress brings to launch, as utilizes multiaddress to improve transmission rate, utilizes multiaddress to realize the seamless switching etc. at terminal.
Yet; In a plurality of IP address that the terminal has simultaneously; Not all IP address all can reach; Though (like the 127.0.0.1 among the IPv4, the address of taking the lead with fe80 among the IPv6) can just can determine whether that for reaching IP, IP address but more can't simply judge whether and can reach through form through the form of address itself in some address; And whether some IP address can reach and exist certain ageingly, and the IP that can reach possibly become unreachable address after certain hour.Just because of the existence of these factors, make the IP validity detection at multiaddress terminal become a major challenge of utilizing the multiaddress advantage.
Numerous based on the Client/Server application of model in; Because the complexity of many IP address environment; Can't obtain authentic and valid IP address; Multiaddress does not only bring due performance and stability to promote to application, has increased on the contrary and has used the possibility of makeing mistakes, and has reduced performance and stability.
Summary of the invention
The technical problem that (one) will solve
The technical problem that the present invention will solve is; To above-mentioned defective; How the IP address validity detection method with many IP End of Address under a kind of Client/Server traffic model is provided, and it can detect authentic and valid IP address on the basis of original Client/Server model communication protocol; Realize the seamless switching of IP address, have better robustness thereby make based on Client/Server application of model program.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides many IP address, a kind of terminal validity detection method, comprise step:
The user end to server end sends first request message, and server end is arrived in all the IP available address registrations of this machine;
First request message that server end sends according to client generates second request message; Be destination address with each listed in first request message IP address respectively; Said second request message is sent to client, if in second scheduled time, receive the response of client to second request message, then corresponding IP address is effective; Otherwise corresponding IP address is invalid.
Wherein, said user end to server end sends first request message, and all the IP available address registrations of this machine are specifically comprised to server end:
Client is in network configuration (like the IP address) when changing, and first scheduled time of every interval send first request message to server end, with all the IP available address registrations of this machine to server end.
Wherein, said first scheduled time is 120s.
Wherein, said user end to server end sends first request message, and all the IP available address registrations of this machine are specifically comprised to server end:
Client is obtained all IP addresses of this machine, and carries out screening and filtering according to address format and fall the IP address that can't directly visit;
Client is inserted all the IP addresses that can directly visit in the message body of first request message, and content that simultaneously can the unique identification terminal is inserted in the message body of first request message as the group number ID of these IP addresses, sends to server end.
Wherein, said second scheduled time is 300ms.
Wherein, First request message that said server end sends according to client generates second request message, is destination address with each listed in first request message IP address respectively, and said second request message is sent to client; If in second scheduled time, receive the response of client to second request message; Then corresponding IP address is effective, otherwise corresponding IP address is invalid specifically to be comprised:
Server end obtains group number ID and all the IP addresses that can directly visit from first request message;
Server end generates second request message that comprises the group number ID that from first request message, obtains, and is destination address with each listed in first request message IP address then, and said second request message is sent to client respectively;
If in second scheduled time, server end is received the response message of client to second request message, and then the pairing IP of the destination address of this second request message address is effective; Otherwise then the pairing IP of the destination address of this second request message address is invalid.
Wherein, said server end obtains from first request message after group number ID and all the IP addresses that can directly visit, further comprises:
Group number ID and all the IP addresses that can directly visit are deposited in the step of IP address list database.
Wherein, said server end obtains from first request message before group number ID and all the IP addresses that can directly visit, further comprises:
Server end returns response message to client after receiving first request message that client sends.
Wherein, if said in second scheduled time, server end is received the response message of client to second request message, and then the pairing IP of the destination address of this second request message address is effective; Otherwise, then the pairing IP of the destination address of this second request message address invalid before, further comprise:
Client is second request message of destination address to what receive with the direct IP address of access client, returns response message to server end.
(3) beneficial effect
The present invention proposes the IP address validity detection method under a kind of Client/Server traffic model with many IP End of Address; Through between client and server; Utilize existing message communicating mechanism in the Client/Server model; Validity to IP address of terminal detects; Realize the real-time detection and the maintenance of client ip address reachable state, and proposed the alternative of primary ip address, thereby make client when primary ip address loses efficacy, can seamlessly switch to the secondary ip address that another can reach; Guaranteed that server end can in time obtain a plurality of of client efficiently and effectively can reach the IP address, utilized many IP address to promote transmittability, stability and reliability for application program practicable basis is provided.
Description of drawings
Fig. 1 is the flow chart of many IP address, terminal validity detection method of the embodiment of the invention;
Fig. 2 is the flow chart of step S1 in the validity detection method of many IP address, terminal according to the invention;
Fig. 3 is the flow chart of step S2 in the validity detection method of many IP address, terminal according to the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
SIP (Session Initiation Protocol; Session initiation protocol) be by IETF (Internet Engineering Task Force; The Internet engineering duty group) propose one be similar to HTTP based on Client/Server application of model layer control protocol, can be used for setting up, revise and stop Multimedia session (perhaps meeting).Session Initiation Protocol is based on the communication protocol of the classics of Client/Server model; The OPTIONS message that defines in the Session Initiation Protocol standard is the request that all standard sip server ends and client are all supported; Utilize its request (REQUEST)/reply (RESPONSE) mechanism; Through testing mechanism reasonable in design and IP address memory mechanism; Can carry out real-time detection to the client address accessibility effectively, the present invention be exactly OPTIONS message with Session Initiation Protocol be that example describes, but the present invention is not limited to Session Initiation Protocol; Any have the application of similar REQUEST/RESPONSE message mechanism at client and server end, and the mode that can adopt the present invention to set forth is carried out the detection of many IP address validity.
As shown in Figure 1, many IP address, terminal of the present invention validity detection method comprises:
Step S1, client are in network configuration (like the IP address) when changing; And first scheduled time of every interval; 120s for example; Send first request message to server end, for example OPTIONS request message (hereinafter to be referred as C-OPTIONS) arrives server end with all the IP available address registrations of this machine.
Because the IP address of client might change; Make that inaccessible address might become and can reach originally after a period of time; And that the address that originally can reach also might become is unreachable, and therefore, client needs regularly initiatively initiate the one-time detection process; When guaranteeing that the client ip address accessibility changes, timely announcement server end.
Concrete realization can be to increase a thread separately in client, with the mode of poll, constantly checks the configuring condition of local network, when finding that network configuration changes, then notifies client to initiate the process of IP address validity check; Also can through in operating system with the mode of registered events, the network configuration change of monitoring system, if this machine IP address changes, operating system can produce an incident, the client-side program that notice is monitored, client is initiated the IP validity check then; Client can also initiatively be initiated one-time detection to server end at regular intervals through timer is set.Through above several kinds of modes; The capital impels client to obtain its all IP address again; Validity to client ip address detects; Thereby server end can correspondingly upgrade IP address in the IP address list database and accessibility sign thereof, and upgrades the primary ip address of client.
As shown in Figure 2, this step specifically comprises:
Step S1.1, client are obtained all IP addresses of this machine, comprise IPv4 and IPv6 address, and screen according to address format, filter out the IP address that can't directly visit.
Under IPv4 and IPv6 environment, all there is special purpose some IP address, on Internet, can't directly visit.In IPv4; The IP address that can't directly visit comprises: loop address (127.0.0.*), privately owned address (10.*.*.*; 172.16.*.*--172.31.*.*, 192.168.*.*), broadcast address (255.255.255.255), multicast address (224.0.0.0-239.255.255.255), link local address (169.254.*.*) etc.; In IPv6; The IP address that can't directly visit comprises: and loopback address (:: 1/128), multicast address (ff01::1/128; Ff02::1/128, ff02::2/128, ff05::2/128; Ff00: :/8), be used for IPv4 mapping the address (:: ffff:0:0/96), be used for the 6to4 addressing (2002: :/16), link local address (fe80: :/64) and unique local address (fc00: :/8, fd00: :/8) etc.
Step S1.2, client are inserted first request message with all the IP addresses that can directly visit; For example in the message body of C-OPTIONS message (Message Body); Content that simultaneously can the unique identification terminal for example utilizes the MD5 algorithm that the MAC Address at terminal is carried out the value after the hash calculation, as the group number ID of these IP addresses; Insert among the Message Body of first request message, send to server end.
The content format of Message Body is with the XML formal definition among the C-OPTIONS, and the assurance server end can correctly be resolved all IP addresses of group number ID and registration.
Shown in the C-OPTIONS request message table 1 specific as follows.The XML form that wherein consults with the client and server end has write all IP addresses of client and the group number ID (group id) at unique identification terminal.
Table 1
First request message that step S2, server end send according to client, for example C-OPTIONS message generates second request message, for example OPTIONS request message (hereinafter to be referred as S-OPTIONS); Be destination address with each listed in first request message IP address respectively, said second request message sent to client, if in second scheduled time; 300ms for example, in receive the response of client to second request message, then corresponding IP address is effective; Can reach; Otherwise corresponding IP address is invalid, and is promptly unreachable;
As shown in Figure 3, this step specifically comprises:
After step S2.1, server end were received first request message that client sends, C-OPTIONS message was for example returned the response message of 200OK to client, and expression has received first request message of client.
Response message is specifically as shown in table 2.
Table 2
Step S2.2, server end for example obtain group number ID and all the IP addresses that can directly visit from first request message in the C-OPTIONS message, deposit them in the IP address list database;
Source IP address in the C-OPTIONS message of wherein, client being sent is as primary ip address.Each IP address all is provided with the accessibility flag in the database, when depositing the IP address in database, has only the accessibility sign of primary ip address to be set to true, and the accessibility sign of remaining address all is set to false.
The concrete design of the list structure of IP address list database is as shown in table 3 below.The ID of Username domain representation client wherein; The IP address of IPAddress territory storage client; GroupID is group number ID, is used for the unique identification terminal, representes which terminal this IP address belongs to; IsMainIP representes whether this IP address is the primary ip address of client; IsValid representes whether this IP address can reach.
Table 3
When server end is when receiving this group number ID for the first time; When server end deposits the IP address in database; Source IP address in the C-OPTIONS message of receiving is made as the primary ip address that can reach, and promptly corresponding IsMainIP territory and IsValid territory, this IP address all is made as true; Its IsMainIP territory, other IP address and IsValid territory in the C-OPTIONS message all are made as false.If when receiving this group number ID once more; Then expression receives that the reason of C-OPTIONS message is the detection once more that client has triggered IP address validity; Variation possibly take place in the IP address that shows client; At this moment identical operations when receiving this group number ID is for the first time carried out in all at first need be in the IP address list database that this group number ID is corresponding list items deletions then.
Step S2.3, server end generate second request message that comprises group number ID among the C-OPTIONS; Be S-OPTIONS; The 3rd scheduled time of interval is a destination address with each listed in first request message IP address then, and said second request message is sent to client respectively.
Even the IP address of client does not change, the externally situation of access client machine also might appear, connect the temporary transient inefficacy of link occurs fault or certain IP address of external network etc. such as client.Therefore; Except client itself needs to initiate the detection through detecting its own IP address situation of change proactive notification server end; Server end also needs the regular the state of validity of initiatively checking the IP address of client registration, thereby realizes the renewal to IP address validity.
Shown in the S-OPTIONS request message table 4 specific as follows.
Table 4
Step S2.4, client are second request message of destination address to what receive with the direct IP address of access client; Return the response message of 200OK to server end; Wherein response ip field extends this as the destination address of this S-OPTIONS message; The expression client can receive through this IP address divides into groups, and promptly this IP address can reach.
The concrete form of response message is as shown in table 5 below:
Table 5
If step S2.5 is in second scheduled time; Server end is received the response message of client to second request message; Then the pairing IP of the destination address of this second request message address is effective; Explain that then the IP address that response ip field is indicated in the client end response message can reach, server end is according to group number and this IP address search IP address list database, and its accessibility sign is set to true; Otherwise then the pairing IP of the destination address of this second request message address is invalid, explains that corresponding IP address is inaccessible, and then the corresponding reachability flag in this IP address is set to false;
If it is unreachable that the primary ip address of client becomes, then it is made as non-primary ip address, the client source IP address that sends response message is set to new primary ip address simultaneously.
The present invention proposes the IP address validity detection method under a kind of Client/Server traffic model with many IP End of Address; Through between client and server; Utilize existing message communicating mechanism in the Client/Server model; Validity to IP address of terminal detects; Realize the real-time detection and the maintenance of client ip address reachable state, and proposed the alternative of primary ip address, thereby make client when primary ip address loses efficacy, can seamlessly switch to the secondary ip address that another can reach; Guaranteed that server end can in time obtain a plurality of of client efficiently and effectively can reach the IP address, utilized many IP address to promote transmittability, stability and reliability for application program practicable basis is provided.
The present invention is an example with the Session Initiation Protocol specifically, utilizes the OPTIONS message in the Session Initiation Protocol, through the message intercommunication of client and server end, has realized the detection to the client machine valid ip address.But the present invention is not limited to Session Initiation Protocol, and any have the application of similar REQUEST/RESPONSE message mechanism at client and server end, and the mode that can adopt the present invention to set forth is carried out the detection of many IP address validity.
Above execution mode only is used to explain the present invention; And be not limitation of the present invention; The those of ordinary skill in relevant technologies field under the situation that does not break away from the spirit and scope of the present invention, can also be made various variations and modification; Therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (9)
1. many IP address, terminal validity detection method is characterized in that, comprises step:
The user end to server end sends first request message, and server end is arrived in all the IP available address registrations of this machine;
First request message that server end sends according to client generates second request message; Be destination address with each listed in first request message IP address respectively; Said second request message is sent to client, if in second scheduled time, receive the response of client to second request message, then corresponding IP address is effective; Otherwise corresponding IP address is invalid.
2. many IP address, terminal according to claim 1 validity detection method is characterized in that said user end to server end sends first request message, and all the IP available address registrations of this machine are specifically comprised to server end:
When client changes in network configuration, and first scheduled time of every interval send first request message to server end, with all the IP available address registrations of this machine to server end.
3. many IP address, terminal according to claim 2 validity detection method is characterized in that said first scheduled time is 120s.
4. many IP address, terminal according to claim 1 validity detection method is characterized in that said user end to server end sends first request message, and all the IP available address registrations of this machine are specifically comprised to server end:
Client is obtained all IP addresses of this machine, and carries out screening and filtering according to address format and fall the IP address that can't directly visit;
Client is inserted all the IP addresses that can directly visit in the message body of first request message, and content that simultaneously can the unique identification terminal is inserted in the message body of first request message as the group number ID of these IP addresses, sends to server end.
5. many IP address, terminal according to claim 1 validity detection method is characterized in that said second scheduled time is 300ms.
6. many IP address, terminal according to claim 1 validity detection method is characterized in that first request message that said server end sends according to client generates second request message; Be destination address with each listed in first request message IP address respectively; Said second request message is sent to client, if in second scheduled time, receive the response of client to second request message, then corresponding IP address is effective; Otherwise corresponding IP address is invalid specifically to be comprised:
Server end obtains group number ID and all the IP addresses that can directly visit from first request message;
Server end generates second request message that comprises the group number ID that from first request message, obtains, and is destination address with each listed in first request message IP address then, and said second request message is sent to client respectively;
If in second scheduled time, server end is received the response message of client to second request message, and then the pairing IP of the destination address of this second request message address is effective; Otherwise then the pairing IP of the destination address of this second request message address is invalid.
7. many IP address, terminal according to claim 6 validity detection method is characterized in that, said server end obtains from first request message after group number ID and all the IP addresses that can directly visit, further comprises:
Group number ID and all the IP addresses that can directly visit are deposited in the step of IP address list database.
8. many IP address, terminal according to claim 6 validity detection method is characterized in that, said server end obtains from first request message before group number ID and all the IP addresses that can directly visit, further comprises:
Server end returns response message to client after receiving first request message that client sends.
9. many IP address, terminal according to claim 6 validity detection method; It is characterized in that; If said in second scheduled time, server end is received the response message of client to second request message, and then the pairing IP of the destination address of this second request message address is effective; Otherwise, then the pairing IP of the destination address of this second request message address invalid before, further comprise:
Client is second request message of destination address to what receive with the direct IP address of access client, returns response message to server end.
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