CN102891810B - Method for dynamically distributing satellite channels by modifying Internet protocol (IP) message header - Google Patents
Method for dynamically distributing satellite channels by modifying Internet protocol (IP) message header Download PDFInfo
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Abstract
The invention discloses a method for dynamically distributing satellite channels by modifying an Internet protocol (IP) message header. The method comprises the following steps of: 1, acquiring an Ethernet data packet of a network card; 2, detecting the data packet, if the data packet is an IP message and is in an IP4V version, executing the step 3, otherwise, receiving and returning the data packet; 3, judging whether an IP header protocol type is a generic routing encapsulation (GRE) message type, if so, executing the step 4, otherwise, receiving and returning the IP header protocol type; 4, resolving a protocol type in a GRE message header of the packet, if the protocol type is a multiple protocol label switching (MPLS) message, executing the step 5, and if the protocol type is the IP message, receiving and returning the protocol type; 5, resolving an MPLS packet header, acquiring an S mark bit which represents a stack bottom, wherein value 1 is the stack bottom, if the S mark bit is the stack bottom, executing the step 6, otherwise, executing the step 9; 6, if the MPLS message comprises a transmission control protocol (TCP) message, judging whether the TCP message is a service message, if so, executing the step 7, otherwise, receiving and returning the TCP message; and 7, modifying a tos domain of the IP header on the outermost layer of the overall message to be an appointed value.
Description
Technical field
The present invention relates to communication gate technical field, provide a kind of method being realized satellite channel dynamic assignment by amendment IP heading.
Background technology
Gateway is in the Traffic Channel dynamic allocation procedure supporting satellite modem, need to carry out ip head tos attribute modification by through gateway to the data of satellite modem, make satellite modem can carry out dynamic construction satellite business channel according to the business datum message containing corresponding tos value, and in the data of satellite channel, the data message related generally to is divided into two classes: the first kind is routing protocol data, i.e. ospf, ldp, bgp, gre message; Equations of The Second Kind is business datum, i.e. MPLS-VPN message, and wherein common ground is all routes and business datum is all encapsulated by GRE message.To the amendment of the business datum message related to, deal with data message is carried out by structure linux driver module, instead of the method revised again after carrying out data packet capturing by application layer packet capturing software, because, by this method of inner nuclear layer module amendment ip data head, shorten the bang path of data message in whole software systems, improve the treatment effeciency of gateway system.
Summary of the invention
The object of the present invention is to provide a kind of method being realized satellite channel dynamic assignment by amendment IP heading.
The present invention is to achieve these goals by the following technical solutions:
Realized a method for satellite channel dynamic assignment by amendment IP heading, it is characterized in that comprising the following steps:
1) network interface card Ethernet data bag is obtained;
2) detect Ethernet data bag, detect as IP message and be IP4V version, then carry out step 3, otherwise receive and return;
3) judge whether the protocol type in IP head is GRE type of message, as then carry out step 4 for GRE type of message, otherwise receives and returns;
4) protocol type in bag GRE heading is resolved, as then carry out step 5 for MPLS message, as then received for IP message and returning;
5) resolve MPLS packet header, obtain S flag bit, whether S is masked as expression is at the bottom of stack, and value 1 is at the bottom of stack; As for carry out step 6 at the bottom of stack, not for carry out step 9 at the bottom of stack;
6) if MPLS message that message comprises is TCP message, determine whether service message, as carry out step 7 for service message, receiving for during non-traffic message and returning;
7) the outermost layer IP head tos territory of revising overall message is designated value.
The present invention has following beneficial effect:
By arranging or change COS (the Type of Service of packet, TOS) field etc., in bag, value of statistical indicant is set, this value of statistical indicant is utilized to carry out bandwidth restriction and classified inquiry, therefore, satellite link can be designed to: when passing through without business datum, all packets walk the signalling path of satellite link, and when business datum MPLS message is through out-of-date, by trigger business passage.This design well improves the utilance of satellite bandwidth.
Accompanying drawing explanation
Fig. 1 is logic block-diagram of the present invention.
Embodiment
The present invention will be further explained below illustrates:
Realized a method for satellite channel dynamic assignment by amendment IP heading, it is characterized in that comprising the following steps:
1) network interface card Ethernet data bag is obtained;
2) detect Ethernet data bag, detect as IP message and be IP4V version, then carry out step 3, otherwise receive and return;
3) judge whether the protocol type in IP head is GRE type of message, as then carry out step 4 for GRE type of message, otherwise receives and returns;
4) protocol type in bag GRE heading is resolved, as then carry out step 5 for MPLS message, as then received for IP message and returning;
5) resolve MPLS packet header, obtain S flag bit, whether S is masked as expression is at the bottom of stack, and value 1 is at the bottom of stack; As for carry out step 6 at the bottom of stack, not for carry out step 9 at the bottom of stack;
6) if MPLS message that message comprises is TCP message, determine whether service message, as carry out step 7 for service message, receiving for during non-traffic message and returning;
7) the outermost layer IP head tos territory of revising overall message is designated value.
Claims (1)
1. realized a method for satellite channel dynamic assignment by amendment IP heading, it is characterized in that comprising the following steps:
1) network interface card Ethernet data bag is obtained;
2) detect Ethernet data bag, detect as IP message and be IPV4 version, then carry out step 3, otherwise receive and return;
3) judge whether the protocol type in IP head is GRE type of message, as then carry out step 4 for GRE type of message, otherwise receives and returns;
4) protocol type in bag GRE heading is resolved, as then carry out step 5 for MPLS message, as then received for IP message and returning;
5) resolve MPLS packet header, obtain S flag bit, S flag bit represents whether be at the bottom of stack, and value 1 is at the bottom of stack; As for carry out step 6 at the bottom of stack, not for carry out step 7 at the bottom of stack;
6) if MPLS message that message comprises is TCP message, determine whether service message, as carry out step 7 for service message, receiving for during non-traffic message and returning;
7) the outermost layer IP head tos territory of revising overall message is designated value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210339578.0A CN102891810B (en) | 2012-09-14 | 2012-09-14 | Method for dynamically distributing satellite channels by modifying Internet protocol (IP) message header |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210339578.0A CN102891810B (en) | 2012-09-14 | 2012-09-14 | Method for dynamically distributing satellite channels by modifying Internet protocol (IP) message header |
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| CN102891810A CN102891810A (en) | 2013-01-23 |
| CN102891810B true CN102891810B (en) | 2015-04-15 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426873B (en) * | 2013-08-30 | 2018-07-03 | 中国科学院声学研究所 | A kind of IP packet generation, sending method and system based on user demand |
| CN105553810A (en) * | 2015-12-14 | 2016-05-04 | 中国联合网络通信集团有限公司 | Method and device for forwarding special line service packet |
| CN109379129A (en) * | 2018-11-30 | 2019-02-22 | 四川安迪科技实业有限公司 | Satellite band Resource dynamic allocation algorithm |
| CN109561094B (en) * | 2018-12-06 | 2021-06-11 | 国网辽宁省电力有限公司锦州供电公司 | Method for changing electric quantity acquisition data message head structure by using wind power level |
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| CN101471863A (en) * | 2007-12-25 | 2009-07-01 | ***通信集团公司 | Method, device and transition gateway for processing data between networks |
| CN101582897A (en) * | 2009-06-02 | 2009-11-18 | 中兴通讯股份有限公司 | Deep packet inspection method and device |
| CN102143035A (en) * | 2010-06-04 | 2011-08-03 | 华为技术有限公司 | Data traffic processing method, network device and network system |
| EP2498450A1 (en) * | 2009-11-03 | 2012-09-12 | ZTE Corporation | Broadband network system and implementation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471863A (en) * | 2007-12-25 | 2009-07-01 | ***通信集团公司 | Method, device and transition gateway for processing data between networks |
| CN101582897A (en) * | 2009-06-02 | 2009-11-18 | 中兴通讯股份有限公司 | Deep packet inspection method and device |
| EP2498450A1 (en) * | 2009-11-03 | 2012-09-12 | ZTE Corporation | Broadband network system and implementation method thereof |
| CN102143035A (en) * | 2010-06-04 | 2011-08-03 | 华为技术有限公司 | Data traffic processing method, network device and network system |
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