CN103916489A - Method and system for resolving single-domain-name multi-IP domain name - Google Patents
Method and system for resolving single-domain-name multi-IP domain name Download PDFInfo
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- CN103916489A CN103916489A CN201410127377.3A CN201410127377A CN103916489A CN 103916489 A CN103916489 A CN 103916489A CN 201410127377 A CN201410127377 A CN 201410127377A CN 103916489 A CN103916489 A CN 103916489A
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Abstract
The invention provides a method and system for resolving a single-domain-name multi-IP domain name. The method comprises the steps that client side equipment selects a first IP address and sends a login request message carrying IPS information which the client side equipment belongs to a transcoding server; the transcoding server judges whether the first IP address is identical with the ISP information which the client side equipment belongs to or not, a routing table item is generated if the first IP address is identical with the ISP information which the client side equipment belongs to, and an outlet interface of the routing table item is a first interface; otherwise, a temporary label is added on the routing table item, a second IP address identical with the ISP information which the client side equipment belongs to is searched for and is written in a login response message; the client side equipment judges whether the second IP address is in a cache or not, and a keep-alive message carrying an update label is sent to the transcoding server through the second IP address if the second IP address is in the cache; if the transcoding server resolves the fact that the update label is carried in the keep-alive message, a routing table item is generated, and an outlet interface of the routing table item is a second interface. The method and system for resolving the single-domain-name multi-IP domain name can ensure the image quality of monitoring videos and improve the utilizing rate of IPS network bandwidths.
Description
Technical field
The present invention relates to communication technical field, relate in particular to domain name analytic method and the system of the many IP of a kind of single domain name.
Background technology
Along with the fast development of Video Supervision Technique and the development of Mobile Internet technology of IP network, monitoring remote video becomes the focus of monitoring trade gradually, and wherein conveniently mobile remote terminal intelligent security guard is subject to people's favor more.In order to realize the long-distance intelligent safety protection function of mobile terminal, mobile monitor client software can be installed on mobile terminal conventionally.Due to the code stream form of monitor data conventionally and Video Monitoring Terminal match, difficulty relatively when common client device reading out data, therefore can between client device and watch-dog, add TS transcoding server, so that the data that client device can obtain can read.So, the domain name of TS transcoding server conventionally can be set in client device, the wireless network providing by each ISP of ISP is initiated authentication registration to long-range TS transcoding server.
Client device generally can visit TS transcoding server by the domain name of TS transcoding server, wherein, needing DNS name resolution server is that client device carries out domain name mapping, domain name mapping by client device input is IP address corresponding to this domain name, and then makes client device pass through described IP address access TS transcoding server.
As shown in Figure 1, in prior art, different ISP can provide different IP addresses (being assumed to be telecommunications network and mobile network) for same domain name, so that signing client device can utilize the higher network bandwidth, the TS transcoding server that fast access domain name is corresponding in service network separately separately.Dns server is not in the time knowing which ISP network described client device belong to; conventionally all IP address corresponding the TS transcoding server parsing can be back to client device, then from these IP addresses, select at random or in order one to initiate registration request message to TS transcoding server by client device.Under the ISP network under the IP address that dns server domain name analysis system returns is not client device when ISP network, as shown in Figure 1, wherein client device uses communication network, but use the mobile IP address access TS transcoding server providing, thereby the mode of this cross operator network can cause a large amount of loss of datas and larger time delay to make image quality decrease in transmitting procedure, thereby make live flower screen when more serious and lose video data and cause poor user's experience effect.
Summary of the invention
In view of this, the invention provides the domain name analytic method of the many IP of a kind of single domain name and IP address corresponding to outgoing interface that system realizes in client device and TS transcoding server and belong to same ISP network, thereby guarantee that client device can obtain the good monitoring image of quality.
The invention provides the domain name analytic method of the many IP of a kind of single domain name, described method comprises:
In multiple IP address corresponding to TS transcoding server domain name that S1. client device goes out in DNS name resolution server parses, select an IP address as object IP address from registration request message to TS transcoding server that send out according to preset rules, in this registration request message, carry the affiliated ISP information of this client device;
S2. when described TS transcoding server is received described registration request message from a described first interface corresponding to IP address, under judging a described IP address, whether ISP is identical with the affiliated ISP of described client device, if, be generated to the route table items of this client device, the outgoing interface in described route table items is described first interface; Otherwise described generation to the route table items of this client device, add interim label, and search with client device under identical the 2nd IP address of ISP, the 2nd IP address is write in registration reply message and is back to client device;
S3. described client device judges whether the 2nd IP address in described registration reply message is present in the DNS buffer memory of self, if, send keep-alive message taking the 2nd IP address as object IP address to TS transcoding server, in described keep-alive message, carry update label;
If S4. described TS transcoding server parses in described keep-alive message and carries update label, generate the route table items substituting with interim label, the outgoing interface in described route table items is the second interface corresponding to described the 2nd IP address.
Based on same design, the present invention also provides the domain name analysis system of the many IP of a kind of single domain name, it is characterized in that,
Described system comprises client device and TS transcoding server, wherein:
In multiple IP address corresponding to TS transcoding server domain name that client device goes out in DNS name resolution server parses, select an IP address as object IP address from registration request message to TS transcoding server that send out according to preset rules, in this registration request message, carry the affiliated ISP information of this client device;
When described TS transcoding server is received described registration request message from a described first interface corresponding to IP address, under judging a described IP address, whether ISP is identical with the affiliated ISP of described client device, if, be generated to the route table items of this client device, the outgoing interface in described route table items is described first interface; Otherwise described generation to the route table items of this client device, add interim label, and search with client device under identical the 2nd IP address of ISP, the 2nd IP address is write in registration reply message and is back to client device;
Described client device judges whether the 2nd IP address in described registration reply message is present in the DNS buffer memory of self, if, send keep-alive message taking the 2nd IP address as object IP address to TS transcoding server, in described keep-alive message, carry update label;
If described TS transcoding server parses in described keep-alive message and carries update label, generate the route table items substituting with interim label, the outgoing interface in described route table items is the second interface corresponding to described the 2nd IP address.
With respect to prior art, the present invention is by distinguishing IP address corresponding to different I SP, make corresponding IP address and the client device of outgoing interface of TS transcoding server belong to same ISP network, thereby at utmost guarantee the picture quality of monitor video, and effectively raise the utilance of the ISP network bandwidth.
Brief description of the drawings
Fig. 1 is the domain name mapping schematic network structure of the many IP of a kind of single domain name in prior art;
Fig. 2 is the domain name analytic method flow chart of the many IP of a kind of single domain name provided by the invention;
Fig. 3 is the domain name mapping schematic network structure of the many IP of a kind of single domain name in the embodiment of the present invention.
Embodiment
In order to address the above problem, to the invention provides the domain name analytic method of the many IP of a kind of single domain name and system realizes client and IP address corresponding to TS transcoding server outgoing interface belongs to same ISP network, thereby guarantee the monitoring image quality that client is obtained.
Refer to Fig. 2, the invention provides the domain name analytic method of the many IP of a kind of single domain name, described method comprises step:
In multiple IP address corresponding to TS transcoding server domain name that 101, client device parses at dns server, select an IP address as object IP address from registration request message to TS transcoding server that send out according to preset rules (random or according to a definite sequence), in this registration request message, carry the ISP information under this client device;
102, described TS transcoding server is when a described first interface corresponding to IP address received described registration request message, judge a described IP address under ISP whether identical with the affiliated ISP of described client device, if so, go to step 103; Otherwise go to step 104;
103, in the time that under ISP under a described IP address and described client device, ISP is identical, TS transcoding server can be generated to the route table items of this client device, and the outgoing interface in described route table items is a described first interface corresponding to IP address;
104, in the time that under ISP under a described IP address and described client device, ISP is different, TS transcoding server can add an interim label on described route table items, and according to the ISP information under the client device carrying in registration request message self search with client device under identical the 2nd IP address of ISP, then the 2nd IP address is write in registration reply message and is back to client device;
105, described client device judges that whether the 2nd IP address in described registration reply message is present in the DNS buffer memory of self, if so, goes to step 106;
106, client device sends keep-alive message taking the 2nd IP address as object IP address to TS transcoding server, in described keep-alive message, carries update label; Described update label represents to satisfy the need and is upgraded by list item;
Carry update label if 107 described TS transcoding servers parse in described keep-alive message, generate the route table items substituting with interim label, the outgoing interface in the route table items after described renewal is the second interface corresponding to described the 2nd IP address.
As can be seen here, the present invention is by distinguishing IP address corresponding to different I SP, make corresponding IP address and the client device of outgoing interface of TS transcoding server belong to same ISP network, thereby at utmost guarantee the picture quality of monitor video, and effectively raise the utilance of the ISP network bandwidth.
In a preferred embodiment, judge that the method whether affiliated ISP in a described IP address is identical with the affiliated ISP of described client device is specially:
Described client device adds mark value corresponding to ISP under self in the described registration request message sending to TS transcoding server; Described TS transcoding server judges that according to the mark value of carrying in described registration request message whether the default mark value that ISP is corresponding under described mark value and a described IP address is identical, if identical, illustrate that described client device is identical with the ISP under a described IP address; Otherwise ISP difference.
It should be noted that, in the embodiment of the present invention, client device is received the registration reply message that TS transcoding server is replied, and get behind the 2nd IP address of carrying in described message, can directly select in theory the address of described the 2nd IP address as TS transcoding server, but consider the problem of network security, for fear of there being assailant to pretend to be TS transcoding server to send this IP address to described client device, also to carry out some safety prevention measures.In the preferred embodiment of the invention; because DNS buffer memory has higher fail safe and anti-buffer memory pollution mechanism; therefore described client device can judge whether the 2nd IP address in described registration reply message is present in the DNS buffer memory of self; if so, send keep-alive message taking the 2nd IP address as object IP address to TS transcoding server.If not in the fail safe that can suspect described the 2nd IP address; in order not affect proper communication; described client device can continue to use an IP address for object IP address is to TS transcoding server transmission keep-alive message; and will in this keep-alive message, carry hold label, wherein hold represents to continue the route table items with interim label with current.So, the attack that client device can avoid assailant to pretend to be TS transcoding server to cause, thus improve the fail safe of accessing.
In the preferred embodiment of the invention, also send (the ISP network that the IP address ownership that now client device is corresponding with TS transcoding server outgoing interface is also just described is not identical) after the message alive with hold label at described client device to TS transcoding server, described client device can periodically send the domain name mapping request message of TS transcoding server to dns server.If client device finds that IP address packet corresponding to the current domain name parsing of DNS, containing described the 2nd IP address, sends keep-alive message using the 2nd IP address as object IP address to TS transcoding server, in described keep-alive message, carry update label.Client device periodically sends the domain name mapping request message of TS transcoding server to dns server, just can in time all IP address corresponding TS transcoding server domain name be updated in DNS buffer memory, to avoid the inconsistent of the IP address of the TS transcoding server in DNS buffer memory and dns server.TS transcoding server is received after the keep-alive message that carries update label; the route table items that carries interim label of setting up before deleting; then regenerate a route table items; the IP address that object IP address is wherein described client, outgoing interface is the second interface corresponding to described the 2nd IP address.So, client device has just had knowing and information updating ability of ISP network to newly adding, thereby improves the result of use of monitor client.
The present invention also provides a kind of domain name analysis system of the domain name analytic method of applying the many IP of above-mentioned single domain name, because the handling process of this system domain name analysis is identical with described method, repeats no more herein.
Below in conjunction with Figure of description 3, with a specific embodiment, the present invention is described in detail.
Wherein, in this network configuration, comprise client device, dns server, TS transcoding server and ISP network, suppose that client device belongs to communication network, dns server also belongs to communication network, has mobile and two ISP networks of telecommunications to provide service for TS transcoding server.Suppose that TS transcoding server is IPA in the IP address of the outgoing interface A of communication network, mark value is 0; TS transcoding server is IPB in the IP address of mobile network's outgoing interface B, and mark value is 1.
Arrow 1 is exactly the request message of client device to the TS transcoding server domain name mapping of dns server transmission; Dns server is analyzed the IP address corresponding to domain name of TS transcoding server according to this request message, then IPA and IPB are sent to client device, as shown in arrow 2.Client device receives after IPA and IPB its buffer memory, and random choose goes out IPB as object IP address, and the mark value of oneself 0 is added in registration request message, and described message is sent to TS transcoding server, as shown in arrow 3.
TS transcoding server receives that whether the mark value that judges after registration request message in the message mark value corresponding with self IPB be identical, the mark value of adding due to client is 0, and the mark value of ISP network corresponding to IPB is 1, illustrate that client and IPB do not belong to same ISP network, generate a route table items to client device, outgoing interface is wherein the interface B that IPB is corresponding, and adds interim label for this list item.Then TS transcoding server can go to search with client device and belong to the IP address (IPA) that the outgoing interface of same ISP network is corresponding, and just IPA writes registration reply message and issues client device, as shown in arrow 4.
Client device is received after this registration reply message; in self DNS buffer memory, search whether there is IPA; because buffer memory before client device is crossed IPA; therefore client device is taking IPA as object IP address; send keep-alive message to TS transcoding server; and in this keep-alive message, carry update label (statement will be updated to IPA by IP the address corresponding outgoing interface of route table items), as shown in arrow 5.
TS transcoding server is received after keep-alive message; can be according to the update label of keep-alive message; the described route table items with interim label is deleted; regenerate a route table items; wherein taking the IP address of client device as destination address, taking interface A corresponding to IPA as outgoing interface, after this; client device sends the keep-alive message with hold label with IPA to TS transcoding server, ensures that link is unimpeded.
As can be seen here, the present invention is by adding different mark value to IP address corresponding to different I SP, make corresponding IP address and the client device of outgoing interface of TS transcoding server belong to same ISP network, thereby at utmost guarantee the picture quality of monitor video, and effectively raise the utilance of the ISP network bandwidth.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (8)
1. a domain name analytic method of the many IP of single domain name, is characterized in that, described method comprises:
In multiple IP address corresponding to TS transcoding server domain name that S1. client device goes out in DNS name resolution server parses, select an IP address as object IP address from registration request message to TS transcoding server that send out according to preset rules, in this registration request message, carry the affiliated ISP information of this client device;
S2. when described TS transcoding server is received described registration request message from a described first interface corresponding to IP address, under judging a described IP address, whether ISP is identical with the affiliated ISP of described client device, if, be generated to the route table items of this client device, the outgoing interface in described route table items is described first interface; Otherwise described generation to the route table items of this client device, add interim label, and search with client device under identical the 2nd IP address of ISP, the 2nd IP address is write in registration reply message and is back to client device;
S3. described client device judges whether the 2nd IP address in described registration reply message is present in the DNS buffer memory of self, if, send keep-alive message taking the 2nd IP address as object IP address to TS transcoding server, in described keep-alive message, carry update label;
If S4. described TS transcoding server parses in described keep-alive message and carries update label, generate the route table items substituting with interim label, the outgoing interface in described route table items is the second interface corresponding to described the 2nd IP address.
2. the method for claim 1, is characterized in that, judges that the method whether affiliated ISP in a described IP address is identical with the affiliated ISP of described client device comprises:
Described client device adds mark value corresponding to ISP under self in the registration request message sending;
Described TS transcoding server judges that according to the mark value of carrying in described registration request message whether the default mark value that ISP is corresponding under described mark value and a described IP address is identical, if so, described client device is identical with the ISP under a described IP address; Otherwise different.
3. the method for claim 1, is characterized in that, described step S3 also comprises:
If client device judges the 2nd IP address in described registration reply message and is not present in the DNS buffer memory of self, send keep-alive message taking an IP address as object IP address to TS transcoding server, in this keep-alive message, carry hold label;
Described step S4 also comprises:
If carry hold label in the described keep-alive message that TS transcoding server parses, leave strip has the route table items of described interim label.
4. method as claimed in claim 3, is characterized in that, described step S3 also comprises:
Send after the message alive with hold label to TS transcoding server at described client device, described client device periodically sends the domain name mapping request message of TS transcoding server to dns server;
If client device finds that IP address packet corresponding to the current domain name parsing of DNS, containing described the 2nd IP address, sends keep-alive message taking the 2nd IP address as object IP address to TS transcoding server, in described keep-alive message, carry update label.
5. a domain name analysis system of the many IP of single domain name, is characterized in that, described system comprises client device and TS transcoding server, wherein:
In multiple IP address corresponding to TS transcoding server domain name that client device goes out in DNS name resolution server parses, select an IP address as object IP address from registration request message to TS transcoding server that send out according to preset rules, in this registration request message, carry the affiliated ISP information of this client device;
When described TS transcoding server is received described registration request message from a described first interface corresponding to IP address, under judging a described IP address, whether ISP is identical with the affiliated ISP of described client device, if, be generated to the route table items of this client device, the outgoing interface in described route table items is described first interface; Otherwise described generation to the route table items of this client device, add interim label, and search with client device under identical the 2nd IP address of ISP, the 2nd IP address is write in registration reply message and is back to client device;
Described client device judges whether the 2nd IP address in described registration reply message is present in the DNS buffer memory of self, if, send keep-alive message taking the 2nd IP address as object IP address to TS transcoding server, in described keep-alive message, carry update label;
If described TS transcoding server parses in described keep-alive message and carries update label, generate the route table items substituting with interim label, the outgoing interface in described route table items is the second interface corresponding to described the 2nd IP address.
6. system as claimed in claim 5, is characterized in that, judges that the method whether affiliated ISP in a described IP address is identical with the affiliated ISP of described client device comprises:
Described client device adds mark value corresponding to ISP under self in the registration request message sending;
Described TS transcoding server judges that according to the mark value of carrying in described registration request message whether the default mark value that ISP is corresponding under described mark value and a described IP address is identical, if so, described client device is identical with the ISP under a described IP address; Otherwise different.
7. system as claimed in claim 5, is characterized in that, described system also for:
If client device judges the 2nd IP address in described registration reply message and is not present in the DNS buffer memory of self, send keep-alive message taking an IP address as object IP address to TS transcoding server, in this keep-alive message, carry hold label;
If carry hold label in the described keep-alive message that TS transcoding server parses, leave strip has the route table items of described interim label.
8. system as claimed in claim 7, is characterized in that, described client device also for:
Send after the message alive with hold label to TS transcoding server at described client device, described client device periodically sends the domain name mapping request message of TS transcoding server to dns server;
If client device finds that IP address packet corresponding to the current domain name parsing of DNS, containing described the 2nd IP address, sends keep-alive message taking the 2nd IP address as object IP address to TS transcoding server, in described keep-alive message, carry update label.
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