CN101383818B - Processing method and device for access network - Google Patents
Processing method and device for access network Download PDFInfo
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- CN101383818B CN101383818B CN2007101498207A CN200710149820A CN101383818B CN 101383818 B CN101383818 B CN 101383818B CN 2007101498207 A CN2007101498207 A CN 2007101498207A CN 200710149820 A CN200710149820 A CN 200710149820A CN 101383818 B CN101383818 B CN 101383818B
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Abstract
The invention discloses a processing method of an access network. The method comprises the following steps: firstly, a TCP connection message of an IP address is received; if the message is an established connection message, the time information of the message is acquired; then whether the connection is allowed to be carried out is judged according to the time information, if not, the connection is stopped. The invention also discloses a processing device of the access network, comprising a message type judging unit, a time information acquiring unit and an access judging unit. The invention judges whether the connection is carried out according to the time information of the message sent by the terminal and stops the unallowed connection, thereby preventing the access of a user terminal with the number over the allowed number by ISP to the internet and increasing the operational efficiency of the ISP.
Description
Technical field
The present invention relates to networking technology area, particularly relate to a kind of processing method and device of access network.
Background technology
Along with developing rapidly of network technology, use the number of the Internet online more and more.At present, at ISP (Internet Service Provider, ISP) in the Internet access service that provides,, circuit or an IP (Internet Protocol, Internet protocol) address only allows to determine the main frame access network of number usually, carries out internet access.But because the general interconnected characteristic of IP technology, in a lot of actual networks, the user often adopts the technology of the multiple shared online such as NAT (Network Address Translation, network address translation) or agency, with a plurality of accessing user terminal to network, carry out internet access.
NAT is an IETF (Internet Engineering Task Force, the Internet Engineering task groups) standard, can translate into inner private network address the IP address of legitimate network, allow an integrated model to appear on the Internet with a public IP address.NAT uses home address in the local area network (LAN) internal network, and when internal node will carry out communication with external network, just home address is replaced to public address, thus the externally upper normal use of internet, and NAT can make many computer share I nternet connect.By NAT, the user can only apply for a legitimate ip address, just among the access of the computer in the whole local area network (LAN) Internet.At this moment, NAT has shielded internal network, and all in-house network computers are sightless for public network.
The structure of the shared online of a kind of multiple host of prior art as shown in Figure 1, be divided into network side and user's side two parts, network side comprises the Internet 111, ISP1 Access Network 121 and ISP2 Access Network 122, and user's side comprises NAT131, user terminal 141, user terminal 142, user terminal 143, user terminal 144, user terminal 145 and user terminal 146.Wherein, user terminal 146 is directly connected to ISP1 Access Network 121 by user B circuit, and ISP1 Access Network 121 is accessing Internet 111 again, makes user terminal 146 carry out internet access; And user terminal 141 to user terminal 145 all is connected on the NAT131, and to ISP1 Access Network 121, ISP1 Access Network 121 is accessing Internet 111 again, makes user terminal 141 to user terminal 145 can both carry out internet access by user A connection for NAT131.When adopting the structure of shared online shown in Figure 1, after user terminal 141 to user terminal 145 can carry out address transition by NAT131, be connected to the Internet by an IP address, carry out internet access.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: because the user can be by the technology of the multiple shared online such as NAT or agency, a plurality of user terminals are passed through an IP address access network, carry out internet access, so when the number of the user terminal that connects this IP address surpasses ISP permission number, can cause the abuse of the line attachment that operator is provided, reduce the operation benefits of ISP.
Summary of the invention
The problem that the embodiment of the invention will solve provides a kind of processing method and device of access network, realized that can only there be the accessing terminal to network of definite number an IP address, has increased the operation benefits of ISP.
For achieving the above object, the technical scheme of the embodiment of the invention provides a kind of processing method of access network, may further comprise the steps: the TCP that receives an IP address connects message; If described message is the message that connects, then obtain the temporal information of described message; According to described temporal information, judge whether to allow to carry out described connection, if not, then stop and carry out described connection.
The technical scheme of the embodiment of the invention also provides a kind of processing unit of access network, comprises the type of message judging unit, is used for judging that the TCP of an IP address that receives connects the type of message; The temporal information acquiring unit is for the temporal information of the message that connects from described TCP connection Receive message; The access judging unit, the temporal information for obtaining according to described temporal information acquiring unit judges whether to allow to carry out described connection.
An embodiment in the technique scheme has following advantage: the embodiment of the invention is according to the temporal information of the message of terminal transmission, judge whether to allow to connect, and unallowed connection is carried out in prevention, allow the user terminal of number to the access of the Internet thereby prevented from surpassing ISP, increased the operation benefits of ISP.
Description of drawings
Fig. 1 is the structural representation that a kind of multiple host of prior art is shared online;
Fig. 2 is the process flow figure of a kind of access network of the embodiment of the invention;
Fig. 3 is the process flow figure of the another kind of access network of the embodiment of the invention;
Fig. 4 is the structural representation of processing unit of a kind of access network of the embodiment of the invention;
Fig. 5 is a kind of network connection architecture schematic diagram of the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
The process flow of a kind of access network of the embodiment of the invention may further comprise the steps as shown in Figure 2:
Step s201, the TCP that receives an IP address connects message.Hypothesis receives the TCP connection message that the IP address is 202.153.45.9 in the present embodiment, and this IP address only allows 2 terminals accesses.Take an IP address as example, also can adopt the processing procedure of the present embodiment for other IP address in the present embodiment.
Step s202, the type of judgement message if described message is the message that connects, then turns step s203; If described message then turns step s213 for remove to connect message or connect overtimely.
Step s203 judges whether contain timestamp in the message, if so, then turns step s206; Otherwise turn step s204.Described timestamp is the option of Transmission Control Protocol, is timestamp field TSopt in TCP, and the size of TSopt is 10 bytes, comprises the time numerical value of length and 24 bytes of the flag bit of 1 byte, 1 byte.The time numerical value of described 24 bytes represents respectively the time of communicating pair, the millisecond number that its numerical value is a machine after restarting (is hundred milliseconds of numbers to the windows system, ten milliseconds of numbers to the linux system), this numerical value can set to 0 after machine is restarted or shut down, and its numerical value comes timing by the crystal oscillator of each terminal.Timestamp has following characteristics: its numerical value begins timing after the terminating machine start, accuracy is 0.1 second (every 1 representative time of increase of counter has increased by 0.1 second) in the windows system, and accuracy is 1 millisecond in the linux system.Main frame sets to 0 after restarting, and it doesn't matter with system time, and the variation of system time does not affect the numerical value of TSopt.Timestamp is defaulted as in the windows system and does not open, and is defaulted as unlatching in the systems such as linux.In the communication process of two terminals, arbitrary terminal sends the TCP bag with timestamp, and then another terminal is responded the TCP bag with TSopt, all will comprise the TSopt option in the later communication process.
Step s204 sends and to excite message to the connect terminal of message of transmission, and described exciting carried TSopt in the message.
Step s205 receives the TCP message that carries timestamp information that described terminal is replied.
Step s206 obtains the timestamp information of message.Because value corresponding in the TCP timestamp field is a counter, and different units is arranged, therefore in practical operation, should convert to this value the unit of unified this value in different operating system.
Step s207 obtains the first difference of the corresponding clock value in local clock and the described timestamp information.Described Difference Storage is in the time difference table in the present embodiment, and this time difference table is initialized as sky, and new time difference of every record represents a terminal and reaches the standard grade in this time difference table.
Step s208 judges the poor of the difference of preserving in the time difference table and the first difference, whether less than threshold value.If so, this difference of then preserving in the time difference table is difference corresponding to this IP address, turns step s210; Otherwise turn step s209.This threshold value is predefined, also can arrange threshold value according to actual conditions.
Step s209 judges that the number of the difference of preserving in the time difference table whether less than the terminal number that allows interconnection network, if so, then is saved in the described difference of obtaining in the time difference table, and turns step s211; Otherwise turn step s212.
Step s210, the difference that this IP address is corresponding is updated to described the first difference.This is operating as optional step, selects to carry out according to actual conditions.
Step s211 allows to carry out described connection and end.Namely normally transmit the described message that connects.
Step s212 stops and carries out described connection and end.Among the embodiment, can adopt and remove or this TCP connection request that resets, and the method that abandons subsequent packet stops and carries out described connection; Among another embodiment, can not process described TCP and connect message or abandon described TCP and connect message, thereby not set up and being connected of terminal; Also can adopt other method to reach the purpose that this terminal could not get on to the Net gets final product.
Step s213 obtains the described difference corresponding in the time difference table that is connected to.
Step s214 judges that whether described connection is the connection of the unique correspondence of described difference, if so, then turns step s215; Otherwise described difference is not processed.Its deterministic process is: each difference of preserving in the time difference table is arranged the connection count value of a correspondence, whenever allow to carry out a connection corresponding with this difference, connection count value that then should correspondence increases a counting; If this connection count value is 1, the then described connection that is connected to the unique correspondence of described difference.
Step s215 deletes described difference.
The present embodiment major control same IP address or 1 link only allow the terminal of specified quantity to surf the Net simultaneously, that is: any one is constantly, can only there be at most the terminal of specified quantity to surf the Net, there are not simultaneously a plurality of terminals connecting network but do not get rid of, but the possibility of surfing the Net in turn.
The temporal information of the message that the present embodiment sends according to terminal judges whether to allow to connect, and stops and carry out unallowed connection, allows the user terminal of number to the access of the Internet thereby prevented from surpassing ISP, has increased the operation benefits of ISP.
The process flow of a kind of access network of the embodiment of the invention may further comprise the steps as shown in Figure 3:
Step s301, the TCP that receives an IP address connects message.Hypothesis receives the TCP connection message that the IP address is 202.153.45.9 in the present embodiment, and this IP address only allows specific terminal access.Take an IP address as example, also can adopt the processing procedure of the present embodiment for other IP address in the present embodiment.
Step s302, the type of judgement message if described message is the message that connects, then turns step s303; If described message then turns step s312 for remove to connect message or connect overtimely.
Step s303 judges whether contain timestamp in the message, if so, then turns step s306; Otherwise turn step s304.
Step s304 sends and to excite message to the connect terminal of message of transmission, and described exciting carried TSopt in the message.
Step s305 receives the TCP message that carries timestamp information that described terminal is replied.
Step s306 obtains the timestamp information of message.Because value corresponding in the TCP timestamp field is a counter, and different units is arranged, therefore in practical operation, should convert to this value the unit of unified this value in different operating system.
Step s307 obtains the first difference of the corresponding clock value in local clock and the described timestamp information.Described Difference Storage is in the time difference table in the present embodiment, and this time difference table is initialized as sky, and new time difference of every record represents a terminal and reaches the standard grade in this time difference table.
Step s308 judges the poor of the difference of preserving in the time difference table and the first difference, whether less than threshold value.If so, this difference of then preserving in the time difference table is difference corresponding to this IP address, turns step s309; Otherwise turn step s311.This threshold value is predefined, also can arrange threshold value according to actual conditions; And the difference of preserving in the time difference table is the difference of specific terminal.
Step s309, the difference that this IP address is corresponding is updated to described the first difference.This is operating as optional step, selects to carry out according to actual conditions.
Step s310 allows to carry out described connection and end.Namely normally transmit the described message that connects.
Step s311 stops and carries out described connection and end.Among the embodiment, can adopt and remove or this TCP connection request that resets, and the method that abandons subsequent packet stops and carries out described connection; Among another embodiment, can not process described TCP and connect message or abandon described TCP and connect message, thereby not set up and being connected of terminal; Also can adopt other method to reach the purpose that this terminal could not get on to the Net gets final product.
Step s312 obtains the described difference corresponding in the time difference table that is connected to.
Step s313 judges that whether described connection is the connection of the unique correspondence of described difference, if so, then turns step s314; Otherwise described difference is not processed.Its deterministic process is: each difference of preserving in the time difference table is arranged the connection count value of a correspondence, whenever allow to carry out a connection corresponding with this difference, connection count value that then should correspondence increases a counting; If this connection count value is 1, the then described connection that is connected to the unique correspondence of described difference.
Step s314 deletes described difference.
The present embodiment only allows specific terminal online, represents the terminal of an online owing to a time difference, so the present embodiment comes main control system by the time difference that control TCP timestamp calculates.Namely only allow the TCP of special time difference to connect, the TCP connection of other differences does not then allow access network.
Above embodiment describes is the processing that the connection request to the transmission of a plurality of terminals under the IP address carries out, for a plurality of IP address, can process accordingly a plurality of connection requests corresponding to each IP address respectively, forbid surpassing under each IP address ISP and allow the user terminal of number to the access of the Internet.Its implementation is with the description of above-mentioned embodiment.
The temporal information of the message that the present embodiment sends according to terminal judges whether to allow to connect, and stops and carry out unallowed connection, allows the user terminal of number to the access of the Internet thereby prevented from surpassing ISP, has increased the operation benefits of ISP.
The processing unit of the access network of a kind of control terminal access of the embodiment of the invention comprises type of message judging unit 41, temporal information acquiring unit 42, access judging unit 43 and difference deletion processing unit 44 as shown in Figure 4.Wherein type of message judging unit 41 is connected processing unit 44 with temporal information acquiring unit 42 respectively and is connected with difference, and access judging unit 43 is connected processing unit 44 with temporal information acquiring unit 42 respectively and is connected with difference.
Type of message judging unit 41 is used for judging that the TCP of an IP address that receives connects the type of message; Temporal information acquiring unit 42 is for the temporal information of the message that connects from described TCP connection Receive message; Access judging unit 43 judges whether to allow to carry out described connection for the temporal information of obtaining according to temporal information acquiring unit 42; Difference deletion processing unit 44 is used for from the difference of access judging unit 43 preservations, obtain and send dismounting connection message or connect difference corresponding to overtime connection, and judge that whether described connection is the connection of the unique correspondence of described difference, if so, then deletes described difference.
Temporal information acquiring unit 42 comprises that further timestamp information obtains subelement 421, difference is obtained subelement 422 and exciton unit 423.Timestamp information obtains subelement 421 and is used for obtaining the timestamp information that described TCP connects message; Difference is obtained subelement 422 and is used for obtaining the first difference that local clock and described timestamp information obtain the corresponding clock value of the timestamp information that subelement obtains; Exciton unit 423 is used for exciting message to the terminal transmission that sends described TCP connection message, makes described terminal send the TCP message that carries timestamp information.
The processing unit of the access network of the present embodiment can be integrated into conventional network equipment such as in fire compartment wall, access server, GGSN or the router etc., also can independently become an equipment, be concatenated in the network, can be Access Layer, convergence-level etc., to on the specific ISP subscriber's line or the TCP of specific public network IP address connect and to carry out determination and analysis control, thereby reach the purpose that the number of terminals of sharing online is accurately controlled.
Take the processing unit of access network as one independently equipment as example, the syndeton schematic diagram of the processing unit access network of a kind of access network of the embodiment of the invention as shown in Figure 5, be divided into network side and user's side two parts, network side comprises processing unit 512, ISP1 Access Network 521 and the ISP2 Access Network 522 of the Internet 511, access network, and user's side comprises NAT531, user terminal 541, user terminal 542, user terminal 543, user terminal 544, user terminal 545 and user terminal 546.Wherein, user terminal 546 is directly connected to ISP1 Access Network 521 by user B circuit, and ISP1 Access Network 521 is by processing unit 512 accessing Internets 511 of access network; And user terminal 541 to user terminal 545 all is connected on the NAT531, and to ISP1 Access Network 521, ISP1 Access Network 521 is by processing unit 512 accessing Internets 511 of access network by user A connection for NAT531.When adopting syndeton shown in Figure 5, the processing unit 512 of access network can connect the TCP of user A circuit carry out determination and analysis control, only allows user terminal 541 to determine the accessing terminal to network of number to the user terminal 545, carries out internet access.
The temporal information of the message that the present embodiment the present invention sends according to terminal judges whether to allow to connect, and stops and carry out unallowed connection, allows the user terminal of number to the access of the Internet thereby prevented from surpassing ISP, has increased the operation benefits of ISP.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode in a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is embodiments of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the processing method of an access network is characterized in that, may further comprise the steps:
The transmission control protocol TCP that receives an Internet protocol IP address connects message;
If described message is the message that connects, then obtain the temporal information of described message;
According to described temporal information, judge whether to allow to carry out described connection, if not, then stop and carry out described connection;
The described temporal information of obtaining message specifically comprises:
Obtain the timestamp information of described message;
Obtain the first difference of the corresponding clock value in local clock and the described timestamp information;
Describedly judge whether to allow to connect according to temporal information, specifically comprise:
Judge according in the difference from the timestamp information of described IP address and local clock calculating gained whether exist and the difference of described the first difference difference less than threshold value, if not, then do not allow to carry out described connection.
2. the processing method of access network as claimed in claim 1 is characterized in that, before the described timestamp information that obtains message, also comprises:
Excite message to the terminal transmission that sends described message;
Receive the TCP message that carries timestamp information that described terminal is replied.
3. the processing method of access network as claimed in claim 1 is characterized in that, also comprises:
If the difference of local difference of preserving and described the first difference of obtaining is less than threshold value, the difference of then this locality being preserved is updated to described the first difference of obtaining.
4. the processing method of access network as claimed in claim 1 is characterized in that, describedly judges whether to allow to connect according to temporal information, specifically comprises:
Judge according to timestamp information and local clock from described IP address and calculate in the difference of gained, whether exist and the difference of described the first difference difference less than threshold value, if not, judge that then whether the number of the difference of calculating gained according to timestamp information and local clock from described IP address is less than the terminal number that allows interconnection network, if not, then do not allow to carry out described connection.
5. the processing method of access network as claimed in claim 4, it is characterized in that, if according to the number of the difference of calculating gained from the timestamp information of described IP address and local clock less than the terminal number that allows interconnection network, then described the first difference of obtaining is saved in the local difference of preserving, and allows to carry out described connection.
6. the processing method of access network as claimed in claim 1 is characterized in that, if described message connects message or connects overtimely for removing, then carries out following steps:
According to timestamp information and the local clock calculated difference from described IP address;
Judge that whether described connection is the connection of the unique correspondence of difference of described calculating gained, if so, then deletes described difference.
7. the processing unit of an access network is characterized in that, comprising:
The type of message judging unit is used for judging that the TCP of an IP address that receives connects the type of message;
The temporal information acquiring unit is for the temporal information of the message that connects from described TCP connection Receive message;
The access judging unit, the temporal information for obtaining according to described temporal information acquiring unit judges whether to allow to carry out described connection;
Described temporal information acquiring unit comprises:
Timestamp information obtains subelement, is used for obtaining the timestamp information that described TCP connects message;
Difference is obtained subelement, is used for obtaining the first difference that local clock and described timestamp information obtain the corresponding clock value of the timestamp information that subelement obtains;
Described access judging unit comprises that difference is preserved subelement, threshold value preserves subelement and difference compares subelement; Described difference is subelement relatively, be used for judging that described difference preserves the poor of the first difference that difference that subelement preserves and described temporal information acquiring unit obtain, whether preserve the threshold value that subelement is preserved less than described threshold value, if not, then do not allow to carry out described connection.
8. the processing unit of access network as claimed in claim 7 is characterized in that, described temporal information acquiring unit also comprises:
The exciton unit is used for exciting message to the terminal transmission that sends described TCP connection message, makes described terminal send the TCP message that carries timestamp information.
9. the processing unit of access network as claimed in claim 7 is characterized in that, described access judging unit also comprises: the terminal number that allows to connect is preserved relatively subelement of subelement and difference number; Described difference number is subelement relatively, preserve the number of the difference of subelement preservation for judging described difference, the terminal number that whether connects less than described permission is preserved the terminal number of the permission interconnection network that subelement preserves, and if not, does not then allow to carry out described connection.
10. the processing unit of access network as claimed in claim 7, it is characterized in that, also comprise difference deletion processing unit, be used for from the difference of described access judging unit preservation, obtain and send dismounting connection message or connect difference corresponding to overtime connection, and judge that whether described connection is the connection of the unique correspondence of described difference, if so, then deletes described difference.
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| CN102594846B (en) * | 2012-04-05 | 2015-10-07 | 北京网御星云信息技术有限公司 | A kind of shared access management algorithm based on IP header and system |
| CN102739787B (en) * | 2012-06-25 | 2015-03-11 | 福建物联天下信息科技有限公司 | Intelligent communication method |
| CN106330582B (en) * | 2015-06-18 | 2020-11-20 | 中兴通讯股份有限公司 | Method and device for detecting number of shared internet access mobile terminals |
| CN106612256A (en) * | 2015-10-23 | 2017-05-03 | 中兴通讯股份有限公司 | Message processing method and message processing device |
| JP6272575B1 (en) * | 2017-01-11 | 2018-01-31 | 甲賀電子株式会社 | Data communication method |
| CN110830419B (en) * | 2018-08-09 | 2021-05-18 | 华为技术有限公司 | Access control method and device for internet protocol camera |
| CN109743242B (en) * | 2018-12-28 | 2021-06-08 | 联创汽车电子有限公司 | CAN bus message control system and control method thereof |
| CN114258153B (en) * | 2021-11-15 | 2023-07-07 | 珠海慧联科技有限公司 | Wireless communication connection method, system and wireless communication device |
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