CN103067276A - Equipment and method based on application layer protocol selection link - Google Patents
Equipment and method based on application layer protocol selection link Download PDFInfo
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- CN103067276A CN103067276A CN201210591786XA CN201210591786A CN103067276A CN 103067276 A CN103067276 A CN 103067276A CN 201210591786X A CN201210591786X A CN 201210591786XA CN 201210591786 A CN201210591786 A CN 201210591786A CN 103067276 A CN103067276 A CN 103067276A
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Abstract
The invention discloses equipment and a method based on an application layer protocol selection link. The method comprises following steps of receiving a message, analyzing triple information of the message, and according to the analyzed the triple information of the message, finding out whether the triple information which is stored in the message is consistent with triple information in a priority level relation list. If the triple information in the message is consistent with the triple information in the priority level relation list, a priority level, corresponding to the triple information, of a relation list, is added on a message header of the message, and according to the priority level of the message header, the message is sent to a corresponding router. With the structure, the method can achieve the aim that an uplink message and a downlink message is transmitted by choosing of the same link.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of Apparatus for () and method therefor of selecting link based on application layer protocol.
Background technology
Current, the link that operator disposes has different qualitative attributes, and the quality of some link is better, some link second-rate.As shown in Figure 1, communication system 10 comprises in the prior art: deep-packet detection (Deep Packet Inspection is called for short DPI) equipment 101, the first router 102, the second router 103 and Third Road are by device 104.Wherein, link 1 comprises DPI equipment 101, the first router 102 and the second router 103, and link 2 comprises DPI equipment 101, the first router 102 and Third Road by device 104, and the quality of link 1 is better than the quality of link 2.Message flow is provided with Differentiated Services Code Point (Differentiated Services Code Point in the IP head in message, be called for short DSCP) mark, DPI equipment 101 arranges the priority of message flow by the numerical value of DSCP mark, when the priority of message flow was higher, the first router 102 selected the higher link 1 of quality to carry out message transmission stream; When the priority of message flow was hanged down, the first router 102 selected the lower link 2 of quality to carry out message transmission stream.But reverse message flow (downlink message stream) can't be selected link, up message flow so just may occur transmits by link 1, and descending message flow transmits by link 2, causes up message flow and descending message flow to select the link of different quality to transmit.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of system and method thereof based on application layer protocol selection link, the problem of selecting the link of different quality to transmit to solve up message and descending message.
First aspect provides a kind of method based on application layer protocol selection link, and it may further comprise the steps: receive message, the triplet information of analytic message; According to the triplet information of the message that parses, whether search consistent with triplet information in the relation table that is stored in triplet information and priority; If when the triplet information of message is consistent with triplet information in the relation table, then priority corresponding with triplet information in the relation table is added in the heading of message; According to the priority in the heading message is sent to corresponding router.
Implementation in conjunction with first aspect, in the possible implementation of the first, method also comprises: if when the triplet information in the triplet information of message and the relation table is inconsistent, then in the heading of message, add corresponding priority by predetermined rule, and according to the priority in the heading message is sent to corresponding router.
In conjunction with the possible implementation of the first of first aspect, in the possible implementation of the second, if also comprise when the triplet information in the triplet information of message and the relation table is inconsistent: judge whether message is first packet; If message is not first packet, then parse the application layer protocol of message, if priority corresponding to application layer protocol is high, then triplet information and the corresponding priority with message is increased in the relation table.
In conjunction with first aspect or the first possibility or the possible implementation of the second, in the third possible implementation, according to the priority in the heading message is sent to corresponding router and also comprise: according to the priority in the heading message address is changed; According to the address of changing out message is sent to corresponding router.
In conjunction with first aspect or the first possibility or the second possibility or the third possible implementation, in the 4th kind of possible implementation, priority is the DSCP value, and the DSCP value is added in 8 bit fields of heading.
In conjunction with first aspect or the first possibility or the second possibility or the third possibility or the 4th kind of possible implementation, in the 5th kind of possible implementation, method also comprises: predetermined rule is: the DSCP value of message is low priority.
Second aspect provides a kind of equipment of selecting link based on application layer protocol, it receives message, and the triplet information of analytic message, whether equipment is according to the triplet information of the message that parses, search consistent with triplet information in the relation table that is stored in triplet information and priority; If when the triplet information of message was consistent with triplet information in the relation table, then equipment added priority corresponding with triplet information in the relation table in the heading of message to, and according to the priority in the heading message is sent to corresponding router.
Implementation in conjunction with second aspect, in the possible implementation of the first, when if the triplet information in the triplet information of message and the relation table is inconsistent, then equipment adds corresponding priority by predetermined rule in the heading of message, and according to the priority in the heading message is sent to corresponding router.
In conjunction with the possible implementation of the first of second aspect, in the possible implementation of the second, if when the triplet information in the triplet information of message and the relation table is inconsistent, equipment judges also whether message is first packet; If message is not first packet, the application layer protocol of device parses outgoing packet then, if priority corresponding to application layer protocol is high, then equipment is increased to triplet information and the corresponding priority of message in the relation table.
In conjunction with second aspect or the first possibility or the possible implementation of the second, in the third possible implementation, equipment is changed message address according to the priority in the heading, and according to the address of changing out message is sent to corresponding router.
In conjunction with second aspect or the first possibility or the second possibility or the third possible implementation, in the 4th kind of possible implementation, priority is the DSCP value, and the DSCP value is added in 8 bit fields of heading.
In conjunction with second aspect or the first possibility or the second possibility or the third possibility or the 4th kind of possible implementation, in the 5th kind of possible implementation, predetermined rule is: the DSCP value of message is low priority.
Implementation in conjunction with second aspect, in the 6th kind of possible implementation, equipment comprises DPI unit and NAT unit, the DPI unit receives message, and the triplet information of analytic message, whether the DPI unit is according to the triplet information of the message that parses, search consistent with triplet information in the relation table that is stored in triplet information and priority; When if the triplet information of message is consistent with triplet information in the relation table, then the DPI unit adds priority corresponding with the triplet information of message in the relation table in the heading of message to, and the NAT unit sends to corresponding router according to the priority in the heading with message.
Whether by such scheme, the invention has the beneficial effects as follows: the present invention is by the triplet information according to the message that parses, search consistent with triplet information in the relation table that is stored in triplet information and priority; When if the triplet information of message is consistent with triplet information in the relation table, then priority corresponding with triplet information in the relation table is added in the heading of message, and according to the priority in the heading message is sent to corresponding router, select same link to transmit to realize up message and descending message.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.Wherein:
Fig. 1 is the schematic block diagram of communication system in the prior art;
Fig. 2 be first embodiment of the invention select the schematic block diagram of the system of link based on application layer protocol;
Fig. 3 be third embodiment of the invention select the schematic block diagram of the system of link based on application layer protocol;
Fig. 4 be first embodiment of the invention select the flow chart of the method for link based on application layer protocol;
Fig. 5 be second embodiment of the invention select the flow chart of the method for link based on application layer protocol;
Fig. 6 be third embodiment of the invention select the flow chart of the method for link based on application layer protocol.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the performing creative labour prerequisite.
Consult Fig. 2, Fig. 2 be first embodiment of the invention select the schematic block diagram of the system of link based on application layer protocol.The system 20 that present embodiment discloses comprises: equipment 201, the first router 202 and the second router 203 of selecting link based on application layer protocol.Wherein, equipment 201 and the first router 202 form link 1, and equipment 201 and the second router 203 form link 2, and the quality of link 1 is good than the quality of link 2.
Whether in the present embodiment, equipment 201 receives messages, and the triplet information of analytic message, and equipment 201 is according to the triplet information of the message that parses, search consistent with triplet information in the relation table that is stored in triplet information and priority.If when the triplet information of message was consistent with triplet information in the relation table, then equipment 201 added priority corresponding with triplet information in the relation table in the heading of message to.Equipment 201 sends to corresponding router according to the priority in the heading with message.Triplet information comprises source address, source port number and the protocol type of described message.
If priority corresponding to triplet information is high priority, then equipment 201 is arranged on high priority in the heading of message, and according to the high priority of heading message is sent to the first router 202, by the first router 202 this message is sent to target device; The downlink message that this message is corresponding then sends to equipment 201 by the first router 202.If priority corresponding to triplet information is low priority, then equipment 201 is arranged on low priority in the heading of message, and according to the low priority of heading message is sent to the second router 203, by the second router 203 this is sent to target device; The downlink message that this message is corresponding can send to equipment 201 by the second router 203.Therefore, uplink message selects identical link to transmit with downlink message.
Present embodiment is by the triplet information of equipment 201 according to the message that parses, whether search consistent with triplet information in the relation table that is stored in triplet information and priority, when if the triplet information of message is consistent with triplet information in the relation table, then equipment 201 adds priority corresponding with triplet information in the relation table in the heading of message to, and according to the priority in the heading message is sent to corresponding router.
The present invention also provides the system based on application layer protocol selection link of the second embodiment, and its basis in the system 20 that the first embodiment discloses is described in detail.In the present embodiment, when if the triplet information in the triplet information of message and the relation table is inconsistent, then equipment 201 adds corresponding priority by predetermined rule in heading, and according to the priority in the heading message is sent to corresponding router.Wherein, priority is the DSCP value, distinguishes the priority of message by the DSCP value, and equipment 201 is added on the DSCP value in 8 bit fields of heading of message, with realization equipment 201 priority is added in the heading of message.Predetermined rule can for, the DSCP value of message is low priority, namely equipment 201 adds the DSCP value of low priority in the heading of message.DSCP value user can set as required, and as the DSCP value is made as 1 and 0, wherein 1 represents high priority, 0 expression low priority.The user also can be made as the DSCP value concrete numerical value, and to define some numerical value be high priority, and other numerical value are low priority; Can be 1,2,3 and 4 such as the DSCP value, wherein 1 is high priority, and 2-4 is low priority.Specifically how to set the DSCP value, how to set priority-level corresponding to each DSCP value, set according to the demand of oneself by the user.
Particularly, if when the triplet information in the triplet information of message and the relation table is inconsistent, then equipment 201 judges also whether message is first packet, if equipment 201 judges that message is first packet, then equipment 201 is made as low priority with the DSCP value of message; If equipment 201 judges that messages are not first packets, the application layer protocol of equipment 201 analytic messages then, if priority corresponding to application layer protocol be high, then equipment 201 is increased to the triplet information of message and the priority of correspondence in the relation table.
In the present embodiment, equipment 201 is by the analyze message feature of carrying or the application layer protocol that comes analytic message by the behavioural characteristic of message.For example, the data content of " http " message carries " http " character string, perhaps continuous several message byte that all is some, and whether equipment 201 has as above feature according to analytic message, with the application layer protocol of analytic message.
In the present embodiment, the application layer protocol of message comprises HTML (Hypertext Markup Language) (Hypertext Transfer Protocol, HTTP), Network File System protocol (Net File System, NFS), domain name system agreement (Domain Name System, DNS), file transfer protocol (FTP) (File Transfer Protocol, FTP), Simple Mail Transfer protocols (Simple Mail Transfer Protocol, SMTP) etc., the user arranges the priority of the application layer protocol of message as required voluntarily.For example user's http protocol is set to high priority, and other agreements are low priority; Perhaps user's http protocol and SMTP are set to high priority, and other agreements are low priority.
In the present embodiment, if the triplet information in the triplet information of message and the relation table is inconsistent, and when message is not first packet, if the priority that the application layer protocol that parses is corresponding is height, then equipment 201 is increased to triplet information and the corresponding priority of message in the relation table, but still add the DSCP value of low priority in this heading, send by common link.When the back has the message of identical triplet information to send over again, can in the relation table of described triplet information and priority, find corresponding triplet information, and can in message, be added to high priority corresponding to this triplet information in the heading, send by high-quality link.
In the present embodiment, equipment 201 also carries out the network address (Network Address Translation according to the priority in the heading to message, NAT) conversion, be that equipment 201 is changed message address according to the DSCP value of message, equipment 201 sends to corresponding router according to the address that converts with message.Like this, the message that has an identical DSCP value can be sent to same router.For example, when priority corresponding to the triplet information of message 1 be high priority, when the DSCP value is 1,201 pairs of described messages of equipment are done the router two 02 of issuing in the high quality link after the address transition and are sent, and the downlink message of replying also can send to equipment 201 by router two 02, equipment 201 carries out address transition to message again, sends to the message initiator.Like this, uplink message just transmits by identical link with downlink message.If priority corresponding to the triplet information of message 2 also is 1 o'clock for high priority, DSCP value also, 201 pairs of described messages 2 of equipment are done the router two 02 of also issuing in the high quality link after the address transition and are sent, and same downlink message of replying also can be issued the equipment 201 that send again by router two 02.Like this uplink message with afternoon message transmit by identical link.
The present invention also provides the system based on application layer protocol selection link of the 3rd embodiment, and system's difference that itself and the second embodiment disclose is: as shown in Figure 3, the equipment 301 that present embodiment discloses comprises DPI unit 304 and NAT unit 305.
In the present embodiment, DPI unit 304 receives message, and the triplet information of analytic message.Whether DPI unit 304 is according to the triplet information of the message that parses, search consistent with triplet information in the relation table that is stored in triplet information and priority.When if the triplet information of message is consistent with triplet information in the relation table, then DPI unit 304 adds priority corresponding with the triplet information of message in the relation table in the heading of message to, and NAT unit 305 sends to corresponding router according to the priority in the heading with message.
The present invention also provides the method based on application layer protocol selection link of the first embodiment, and its basis in the system 20 that the first embodiment discloses is described in detail.As shown in Figure 4, the method that discloses of present embodiment may further comprise the steps:
Step 401: equipment 201 receives message, and the triplet information of analytic message;
Whether step 402: equipment 201 is according to the triplet information of the message that parses, search consistent with triplet information in the relation table that is stored in triplet information and priority;
Step 403: if when the triplet information of message was consistent with triplet information in the relation table, then equipment 201 added priority corresponding with triplet information in the relation table in the heading of message;
Step 404: equipment 201 sends to corresponding router according to the priority in the heading with message.
In the present embodiment, if priority corresponding to triplet information is high priority, then equipment 201 is arranged on high priority in the heading of message, and according to the high priority of heading message is sent to the first router 202, by the first router 202 message is sent; The downlink message that this message is corresponding sends to equipment 201 by the first router 202.If priority corresponding to triplet information is low priority, then equipment 201 is arranged on low priority in the heading of message, and according to the low priority of heading message is sent to the second router 203, by the second router 203 message is sent; The downlink message that this message is corresponding sends to equipment 201 by the second router 203.Therefore, uplink message selects identical link to transmit with downlink message.
The present invention also provides the method based on application layer protocol selection link of the second embodiment, and its basis in the method that the first embodiment discloses is described in detail.As shown in Figure 5, step 501-504 is similar to step 401-404, please refer to the description among the step 401-404, does not repeat them here;
Step 505: if when the triplet information in the triplet information of message and the relation table is inconsistent, then equipment 201 judges also whether message is first packet;
Step 506: if equipment 201 judges that message is first packet, then equipment 201 is made as low priority with the DSCP value of message;
Step 507: if equipment 201 judges that messages are not first packets, the application layer protocol of equipment 201 analytic messages then;
Step 508: if priority corresponding to application layer protocol is high, then equipment 201 is increased to triplet information and the corresponding priority of message in the relation table.
In step 507, equipment 201 is by the analyze message feature of carrying or the application layer protocol that comes analytic message by the behavioural characteristic of message.For example, the data content of " http " message carries " http " character string, perhaps continuous several message byte that all is some, and whether equipment 201 has as above feature according to analytic message, with the application layer protocol of analytic message.
In step 508, if priority corresponding to application layer protocol is high, then equipment 201 is increased to triplet information and the corresponding priority of message in the relation table; And the DSCP value that low priority is corresponding adds in the heading of message, carries out address transition according to this DSCP value, and sends.
The present invention also provides the method based on application layer protocol selection link of the 3rd embodiment, and it selects the basis of the system of link to be described in detail the 3rd embodiment's based on application layer protocol.As shown in Figure 6, the method that discloses of present embodiment may further comprise the steps:
Step 601:DPI unit 304 receives message, and the triplet information of analytic message;
Whether step 602:DPI unit 304 is according to the triplet information of the message that parses, search consistent with triplet information in the relation table that is stored in triplet information and priority;
Step 603: if when the triplet information of message was consistent with triplet information in the relation table, then DPI unit 304 added priority corresponding with the triplet information of message in the relation table in the heading of message to;
Step 604:NAT unit 305 sends to corresponding router according to the priority in the heading with message.
Whether in sum, the present invention is by DPI unit 304 triplet information according to the message that parses, search consistent with triplet information in the relation table that is stored in triplet information and priority; When if the triplet information of message is consistent with triplet information in the relation table, then DPI unit 304 adds priority corresponding with triplet information in the relation table in the heading of message, NAT unit 305 sends to corresponding router according to the priority in the heading with message, and the router by correspondence sends; And descending message can arrive first this corresponding router, by this corresponding router message is sent to NAT unit 305 and DPI unit 304 again, selects same link to transmit to realize up message and descending message.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (13)
1. the method based on application layer protocol selection link is characterized in that, said method comprising the steps of:
Receive message, resolve the triplet information of described message;
According to the triplet information of the described message that parses, whether search consistent with triplet information in the relation table that is stored in triplet information and priority;
If when the triplet information of described message is consistent with triplet information in the described relation table, then priority corresponding with described triplet information in the described relation table is added in the heading of described message;
According to the described priority in the described heading described message is sent to corresponding router.
2. method according to claim 1 is characterized in that, described method also comprises:
When if the triplet information in the triplet information of described message and the described relation table is inconsistent, then in the heading of described message, add corresponding priority by predetermined rule, and according to the described priority in the heading described message is sent to corresponding router.
3. method according to claim 2 is characterized in that, if also comprise when the triplet information in the triplet information of described message and the described relation table is inconsistent:
Judge whether described message is first packet; If described message is not first packet, then parse the application layer protocol of described message, if priority corresponding to described application layer protocol is high, then triplet information and the corresponding priority with described message is increased in the described relation table.
4. described method is characterized in that according to claim 1-3, describedly according to the described priority in the described heading described message is sent to corresponding router and also comprises:
According to the described priority in the described heading described message address is changed;
According to described address of changing out described message is sent to corresponding router.
5. described method is characterized in that according to claim 1-4, and described priority is the DSCP value, and described DSCP value is added in 8 bit fields of heading.
6. described method is characterized in that according to claim 1-5, and described method also comprises: described predetermined rule is: the DSCP value of described message is low priority.
7. equipment of selecting link based on application layer protocol, it is characterized in that, described equipment receives message, and resolve the triplet information of described message, whether described equipment is according to the triplet information of the described message that parses, search consistent with triplet information in the relation table that is stored in triplet information and priority; When if the triplet information of described message is consistent with triplet information in the described relation table, then described equipment adds priority corresponding with described triplet information in the described relation table in the heading of described message to, and according to the described priority in the described heading described message is sent to corresponding router.
8. equipment according to claim 7, it is characterized in that, when if the triplet information in the triplet information of described message and the described relation table is inconsistent, then described equipment adds corresponding priority by predetermined rule in the heading of described message, and according to the described priority in the heading described message is sent to corresponding router.
9. equipment according to claim 8 is characterized in that, if when the triplet information in the triplet information of described message and the described relation table is inconsistent, described equipment judges also whether described message is first packet; If described message is not first packet, then described device parses goes out the application layer protocol of described message, if priority corresponding to described application layer protocol is high, then described equipment is increased to triplet information and the corresponding priority of described message in the described relation table.
10. described equipment is characterized in that according to claim 7-9, and described equipment is changed described message address according to the described priority in the described heading, and according to described address of changing out described message is sent to corresponding router.
11. described equipment is characterized in that according to claim 7-10, described priority is the DSCP value, and described DSCP value is added in 8 bit fields of heading.
12. described equipment is characterized in that according to claim 7-11, described predetermined rule is: the DSCP value of described message is low priority.
13. equipment according to claim 7, it is characterized in that, described equipment comprises DPI unit and NAT unit, described DPI unit receives message, and resolve the triplet information of described message, whether described DPI unit is according to the triplet information of the described message that parses, search consistent with triplet information in the relation table that is stored in triplet information and priority; When if the triplet information of described message is consistent with triplet information in the described relation table, then described DPI unit adds priority corresponding with the triplet information of described message in the described relation table in the heading of described message to, and described NAT unit sends to corresponding router according to the described priority in the described heading with described message.
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| CN106713357A (en) * | 2017-01-24 | 2017-05-24 | 南京仁谷系统集成有限公司 | Universal network protocol analysis method |
| CN108989311A (en) * | 2013-05-31 | 2018-12-11 | 华为技术有限公司 | Generate the method and apparatus of input parameter |
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