CN102215102A - Method and applications of network monitoring data packet with timestamp - Google Patents
Method and applications of network monitoring data packet with timestamp Download PDFInfo
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Abstract
The invention relates to the technical field of frame format definition and usage of a network monitoring data packet, and in particular relates to a method and applications of the network monitoring data packet with timestamp. The method is characterized in that a TAP is connected in series between a server and an IP (internet protocol) exchanger or a router connected with the server, a shunt circuit of the TAP is connected with a data collecting device, and the data collecting device is connected with a subsequent processor; the data collecting device performs frame format definition on an original data packet through copying various data packets sent by the server in real time and sending to the data collecting device by the TAP; original data packets of all types are collected by the data collecting device, and the original data packets are stored through an operating system; and the timestamp is selected according to required accuracy degree requirements, the timestamp is increased to the tail end of each original data packet, and is sent to the subsequent processor to subsequent processing. The invention provides an efficient and simple method for capturing and storing the data packets, and the time accuracy of the data packets is improved.
Description
[technical field]
The present invention relates to the monitoring technical field of network service, the method and the purposes of a kind of specifically data structure of the network monitoring data bag with timestamp or frame format (Data Frame) definition.
[background technology]
The IT technology depends on the transmission of network to data more and more now.The network monitor technology that the data of transmitting on the diverse network are grasped and analyze is the modern network necessary part.In the time the timestamp that grasps packet need being transmitted with the packet that grabs or present, prior art mainly is by the time for reading information module, asks a timestamp to be associated with packet by the user.
Domestic patent 03142734.0 discloses a kind of method of computer network end host computer system precise marking timestamp, this method is provided with the queue sequence of first in first out in the timestamp access module, after obtaining timestamp, ask to send or accept timestamp according to the user, this method can the precise marking timestamp, but can't screen in advance and preserve, can't be used for the processing and the transmission of mass data bag, transmission efficiency is low.
[summary of the invention]
Purpose of the present invention will solve the deficiencies in the prior art exactly, and a kind of data structure or frame format (Data Frame) define method and purposes of the network monitoring data bag with timestamp is provided.
Design a kind of method of the network monitoring data bag with timestamp for achieving the above object, comprise server, interchanger or router, data acquisition equipment is characterized in that this method comprises that raw data packets obtains and treatment step, as Fig. 1, shown in Figure 4:
The acquisition step of A, raw data packets:
A, between switch that server is connected with server or router splitter TAP of series connection, the shunt of splitter TAP connects data acquisition equipment, described data acquisition equipment is connected with the subsequent treatment machine or both are uniform machinery;
B, process splitter TAP duplicate through switch or router transmission or the various packets that receive in real time and send to data acquisition equipment, and the packet that data acquisition equipment collects is a raw data packets;
B, raw data packets are handled:
A, by data acquisition equipment acquisition filter all raw data packets that need of coming out, and raw data packets is preserved by operating system, driver or the application program of data acquisition equipment;
The expression way of corresponding timestamp and the byte length of correlated expression are selected in b, time levels of precision requirement as required, the timestamp of this respective byte are increased to the front or the end of each raw data packets;
The network monitoring data bag of c, the band timestamp that will finish sends on the subsequent treatment machine;
D, subsequent treatment machine carry out data structure or frame format DataFrame definition to the composite network Monitoring Data bag that receives, and extract all or part of data message from the network measuring packet of these band timestamps.
Described data structure or frame format define that the following data acquisition equipment of its concrete steps can adopt any network layer protocol, any transport layer protocol, any session-layer protocol, any statement layer protocol, any application layer protocol, any internal memory duplicates or share, the storage of any memory and read or sharing mode sends in the application software of subsequent treatment machine and carries out subsequent treatment, as shown in Figure 2.
The acquisition step of the raw data packets of this method can also be following steps: mirror port is set on switch connects data acquisition equipment, described data acquisition equipment is connected with the subsequent treatment machine or both are uniform machinery; Duplicate process switch or router transmission or the various packets that receive in real time and send to data acquisition equipment through splitter TAP, the packet that data acquisition equipment collects is a raw data packets.
Described server available network terminal equipment replaces as shown in Figure 3.
Described data acquisition equipment is connected with the subsequent treatment machine or both are uniform machinery.
Described operating system is LINUX, WINDOWS or other operating system as real-time operating system.
The specific implementation of described method can be by the C/C++ language, the realization of Java language, OpenCL language, formula translation, PERL language or other any attainable computer languages.
It is the hardware system of core component that the hardware platform of described data acquisition equipment can be based on hardware system or the DSP that computer that CPU is a core component or FPGA be core component.
Described data acquisition equipment is C98Ipmon or other network data acquisition equipment.
It can be LAN (Local Area Network) or Ethernet that this method is applied to monitored network, WIFI wireless network or WLAN or comprise self-organizing WLAN MESH network, the second generation or 2G GSM or 2G CMDA mobile communications network, the third generation or 3G mobile communications network, the 4th generation or LTE mobile communications network, Intranet, in the EPON EPON, the GPON EPON, intelligence switched optical network or ASON network, the wireless Internet of Things of ZigBee, the wireless Internet of Things of RFID, the computer networking of PCIe agreement, the Computer Storage networking of storage system agreement Network Based, network based on the networking of cloud computing technology, intelligent grid communication network and dispatch network, network based on satellite communication, network based on microwave communication, Ubiquitous Network.
The present invention compares with prior art, can be in monitored network data traffic very big in, the packet that grabs is defined, screens and preserves, and to the increase of the packet after screening timestamp, timestamp and packet combine transmission, make transmission course more efficient simple; Reduce the possibility of data-bag lost in the processing procedure, thereby the accuracy of network monitor subsequent analysis significantly is provided.
[description of drawings]
Fig. 1 is the equipment connection diagram that the present invention passes through splitter collection network data;
Fig. 2 is the equipment connection diagram that the present invention passes through switch mirror port image data bag;
Fig. 3 is the equipment connection diagram that the present invention passes through network-termination device image data bag;
Fig. 4 is a schematic flow sheet of the present invention;
Fig. 5 is the timestamp expression formula when grasping raw data packets;
Fig. 6 is the timestamp decoding;
Fig. 7 is the network packet that has timestamp;
Among the figure 1, server 2, splitter TAP 3, IP interchanger or router four, data acquisition unit 5, subsequent treatment machine.
[embodiment]
The present invention will be further described in conjunction with the accompanying drawings, and the manufacturing technology of this device is very clearly concerning this professional people.
1) the network packet collecting device by with one or more physical interfaces of monitored network, grasp the packet (number is W) on the monitored network in real time.
2) in the operating system of network packet collecting device, in driver or the application program (hereinafter to be referred as program),, these packets are filtered by the filtering rule of prior setting; Need to determine the packet (number is the packet of X, and its type of data packet is type of data packet A) of analysis;
3) the X number packet of these type of data packet A is left in these programs in the corresponding cache space.
4) allow the Frame or the length of data package L of output according to the maximum of this network packet collecting device output interface, define a kind of packet that merges H type of data packet A, (be called for short packet BP to a scheme of forming composite network Monitoring Data bag, its type of data packet B requires this H length of data package LH sum total that is combined less than length L).
5) packet that is the N byte to a length collecting if desired (is called for short packet P, its type is type of data packet A) when gathering the association in time of this packet, to the required precision difference of timestamp, the form of the timestamp of a M byte of definition is expressed, is stored and transmits this timestamp (abbreviation time stamp T) according to test.
6) packet P and its time corresponding are stabbed the packet P1 (its type is type of data packet C) that T is fused into a N byte;
Specific practice is to seek a unessential M byte in packet P, substitutes a unessential M byte among the P with the time stamp T of this packet capturing.This method is that packet itself contains timestamp information, but length of data package is constant.
7) allow the Frame or the length of data package L of output according to the maximum of this network packet collecting device output port, the packet that merges the similar P1 of a plurality of type of data packet C, (be called for short packet DP to a composite network Monitoring Data bag that has timestamp, its type of data packet C requires this H length of data package sum total that is combined less than length L).Each has the composite network Monitoring Data bag of timestamp, and disposable independent transmission is come out.
8) the network packet collecting device is transferred to the application program of this machine or the subsequent treatment machine of far-end with this composite network Monitoring Data DP bag once.
In LAN (Local Area Network) (LAN) or Ethernet, use the technical scheme case study on implementation of realizing.
Prioritization scheme:
If in a network protocol analysis process, we only need to analyze the packet of Transmission Control Protocol.Above-mentioned technical scheme can realize according to following case study on implementation:
Step 1: data acquisition
The network packet collecting device of Ethernet can be by the network packet that grasps this Ethernet switch of flowing through that is connected of the mirror port that provides with Ethernet switch.Ethernet network packet collecting device also can grasp the network packet of this Ethernet switch of flowing through by the connected mode of Ethernet electric shunt or optical branching device.These Ethernet electric shunts or optical branching device are to be connected across on the cable or cable line of Ethernet switch and other network equipment.By being connected of these splitters and ethernet network packet collecting device, the Ethernet data bag of flow through these circuit or light path can be transferred to collector.
For example: grab following five ethernet network packets (W=5):
The packet 1 that grabs has 54 byte lengths, and it is as follows that its content is expressed as 16 systems:
01?00?01?00?00?00?7a?62?20?00?01?00?08?00?45?00?00?28?01?00
00?00?6d?06?e2?a4?de?ba?32?4f?3a?29?1e?f9?17?70?05?99?7f?eb
00?00?00?00?00?00?50?02?40?00?68?c2?00?00
It is a tcp data bag.The timestamp that grasps this packet is 15: 11: 27.312500000 on the 5th January in 2011.This timestamp can be expressed as the structure enumerated among the technical scheme B.The expression-form that this timestamp adopts 72 bit length forms (i.e. 9 byte longs) is as shown in Figure 5:
Its binary bit is expressed as:
00000?11111011011?0001?00101?00111?001011?011011?0100111000?01111101000000000000
Hexadecimal is expressed:
07?DB?12?9C?B6?D3?87?D0?00
Below the timestamp of each packet adopt and to handle with the method.
Decoding come out as Fig. 6:
The packet 2 that grabs has 54 byte lengths, and it is as follows that its content is expressed as 16 systems:
01?00?01?00?00?00?7a?62?20?00?01?00?08?00?45?00?00?28?01?00
00?00?6f?06?3a?d6?3d?93?79?45?3a?29?1e?f9?17?70?05?99?7f?55
00?00?00?00?00?00?50?02?40?00?c3?89?00?00
It is a tcp data bag.The timestamp that grasps this packet is: the date is on January 5th, 2011, and the time is 15: 11 27.31,984,375 seconds (being 15:11:31,984,375)
The packet 3 that grabs has 72 byte lengths, and it is as follows that its content is expressed as 16 systems:
7a?62?20?00?01?00?01?00?01?00?00?00?08?00?45?00?00?3a?80?80
00?00?80?11?ad?55?3a?29?1e?f9?b4?a8?ff?12?c5?82?00?35?00?26
d5?38?3a?98?01?00?00?01?00?00?00?00?00?00?03?73?75?70?04?6c
69?76?65?03?63?6f?6d?00?00?01?00?01
It is the packet of a DNS Protocol.The timestamp that grasps this packet is: the date is on January 5th, 2011, and the time is 15: 11 27.35,406,250 seconds (being 15:11:35,406,250)
The packet 4 that grabs has 132 byte lengths, and it is as follows that its content is expressed as 16 systems:
01?00?01?00?00?00?7a?62?20?00?01?00?08?00?45?00?00?76?85?87
40?00?fa?11?ee?11?b4?a8?ff?12?3a?29?1e?f9?00?35?c5?82?00?62
0b?12?3a?98?81?80?00?01?00?02?00?00?00?00?03?73?75?70?04?6c
69?76?65?03?63?6f?6d?00?00?01?00?01?c0?0c?00?05?00?01?00?00
0b?be?00?20?03?73?75?70?04?6c?69?76?65?03?63?6f?6d?06?67?6c
62?64?6e?73?09?6d?69?63?72?6f?73?6f?66?74?c0?15?c0?2a?00?01
00?01?00?00?00?fc?00?04?41?36?a7?1b
It is the packet of a DNS Protocol.The timestamp that grasps this packet is
Date is on January 5th, 2011, and the time is 15: 11 15:11:35,437,500 seconds (being 15:11:35,437,500)
The packet 5 that grabs has 62 byte lengths, and it is as follows that its content is expressed as 16 systems:
7a?62?20?00?01?00?01?00?01?00?00?00?08?00?45?00?00?30?80?81
40?00?80?06?38?d3?3a?29?1e?f9?41?36?a7?1b?07?e6?00?50?05?0d
6d?45?00?00?00?00?70?02?40?00?87?37?00?00?02?04?05?a0?01?01
04?02
It is a Transmission Control Protocol packet.The timestamp that grasps this packet is
Date is on January 5th, 2011, and the time is 15: 11 15:11:35,437,500 seconds (being 15:11:35,437,500)
Step 2: data filter obtains the packet of type of data packet A
The packet definitions that will need subsequent analysis after below will filtering is the packet of type of data packet A.
Because we only need to analyze the packet of Transmission Control Protocol, after the network packet collecting device collects above-mentioned ethernet network packet, in operating system (for example: LINUX or WINDOWS operating system in) the driver (also can in kernel program or application program), packet 3 and 4 that just can be above-mentioned filters out, just only remaining three packets (X=3) that we need:
Tcp data bag 1: the packet 1 that grabs has 54 byte lengths, and it is as follows that its content is expressed as 16 systems:
01?00?01?00?00?00?7a?62?20?00?01?00?08?00?45?00?00?28?01?00
00?00?6d?06?e2?a4?de?ba?32?4f?3a?29?1e?f9?17?70?05?99?7f?eb
00?00?00?00?00?00?50?02?40?00?68?c2?00?00
Tcp data bag 2: the packet 2 that grabs has 54 byte lengths, and it is as follows that its content is expressed as 16 systems:
01?00?01?00?00?00?7a?62?20?00?01?00?08?00?45?00?00?28?01?00
00?00?6f?06?3a?d6?3d?93?79?45?3a?29?1e?f9?17?70?05?99?7f?55
00?00?00?00?00?00?50?02?40?00?c3?89?00?00
Tcp data bag 3: the packet 5 that grabs has 62 byte lengths, and it is as follows that its content is expressed as 16 systems:
7a?62?20?00?01?00?01?00?01?00?00?00?08?00?45?00?00?30?80?81
40?00?80?06?38?d3?3a?29?1e?f9?41?36?a7?1b?07?e6?00?50?05?0d
6d?45?00?00?00?00?70?02?40?00?87?37?00?00?02?04?05?a0?01?01
04?02
Step 3: the depositing of the packet of type of data packet A
Above-mentioned analysis and filter mainly is the operating system at the network packet collecting device, realizes in driver or the application program; Only preserve this 3 packets and relevant timestamp that subsequent analysis is handled to be needed, leave in these corresponding programs.
Step 4: be packaged into the network monitoring data bag that has timestamp
Adopt technical scheme B, this timestamp adopts 72 bit length forms (i.e. 9 byte longs), occupies low 24 and whole source MACs 48 of target MAC (Media Access Control) address, and high 24 of target MAC (Media Access Control) address remain unchanged.Be packaged into have timestamp the network monitoring data bag as shown in Figure 7:
DMAC: target MAC (Media Access Control) address; SMAC: source MAC
The length of network monitoring data bag that has timestamp after the encapsulation was the same with original length of data package, remained unchanged.
With first packet:
01?00?01?00?00?00?7a?62?20?00?01?00?08?00?45?00?00?28?01?00
00?00?6d?06?e2?a4?de?ba?32?4f?3a?29?1e?f9?1?7?70?05?99?7f?eb
00?00?00?00?00?00?50?02?40?00?68?c2?00?00
And timestamp:
07?DB?12?9C?B6?D3?87?D0?00
The network monitoring data bag that has timestamp after the merging is:
01?00?01?XX?XX?XX?XX?XX?XX?XX?XX?XX?08?00?45?00?00?28
00?00?6d?06?e2?a4?de?ba?32?4f?3a?29?1e?f9?17?70?05?99?7f?eb
00?00?00?00?00?00?50?02?40?00?68?c2?00?00
The particular content of the network monitoring data bag of above-mentioned band timestamp has been hidden with XX.
Follow-up packet and time corresponding can be stabbed merging successively;
Step 5: the free network packet of stabbing of the real-time transport tape one by one of network packet collecting device
The network packet that the network packet collecting device has these timestamp in real time one by one is transferred to the application program of this machine or the subsequent treatment machine of far-end.
Step 6: the free network packet of stabbing of the real-time receiving belt one by one of subsequent treatment machine
Subsequent treatment machine (the subsequent treatment machine of application program of this machine or far-end) reads out packet and time corresponding stamp respectively according to the network data pack arrangement that has timestamp of above-mentioned definition.Because target MAC (Media Access Control) address and source MAC are inessential, no longer perform an analysis.
Claims (10)
1. a method that has the network monitoring data bag of timestamp comprises server, interchanger or router, and data acquisition equipment is characterized in that this method comprises that raw data packets obtains and treatment step:
The acquisition step of A, raw data packets:
A, between switch that server is connected with server or router splitter TAP of series connection, the shunt of splitter TAP connects data acquisition equipment, described data acquisition equipment is connected with the subsequent treatment machine or both are uniform machinery;
B, process splitter TAP duplicate through switch or router transmission or the various packets that receive in real time and send to data acquisition equipment, and the packet that data acquisition equipment collects is a raw data packets;
B, raw data packets are handled:
A, by data acquisition equipment acquisition filter all raw data packets that need of coming out, and raw data packets is preserved by operating system, driver or the application program of data acquisition equipment;
The expression way of corresponding timestamp and the byte length of correlated expression are selected in b, time levels of precision requirement as required, the timestamp of this respective byte are increased to the front or the end of each raw data packets;
The network monitoring data bag of c, the band timestamp that will finish sends on the subsequent treatment machine;
D, subsequent treatment machine carry out data structure or frame format Data Frame definition to the composite network Monitoring Data bag that receives, and extract all or part of data message from the network measuring packet of these band timestamps.
2. a kind of method that has the network monitoring data bag of timestamp as claimed in claim 1, it is characterized in that described data structure or frame format define that the following data acquisition equipment of its concrete steps can adopt any network layer protocol, any transport layer protocol, any session-layer protocol, any statement layer protocol, any application layer protocol, any internal memory duplicates or share, the storage of any memory and read or sharing mode sends in the application software of subsequent treatment machine and carries out subsequent treatment.
3. a kind of method that has the network monitoring data bag of timestamp as claimed in claim 1, the acquisition step that it is characterized in that the raw data packets of this method can also be following steps: mirror port is set on switch connects data acquisition equipment, described data acquisition equipment is connected with the subsequent treatment machine or both are uniform machinery; Duplicate process switch or router transmission or the various packets that receive in real time and send to data acquisition equipment through splitter TAP, the packet that data acquisition equipment collects is a raw data packets.
4. a kind of method that has the network monitoring data bag of timestamp as claimed in claim 1 is characterized in that described server available network terminal equipment replaces.
5. a kind of method that has the network monitoring data bag of timestamp as claimed in claim 1 is characterized in that described data acquisition equipment is connected with the subsequent treatment machine or both are uniform machinery.
6. a kind of method that has the network monitoring data bag of timestamp as claimed in claim 1 is characterized in that described operating system is LINUX, WINDOWS or other operating system as real-time operating system.
7. a kind of method that has the network monitoring data bag of timestamp as claimed in claim 1, the specific implementation that it is characterized in that described method can be by the C/C++ language, the realization of Java language, OpenCL language, formula translation, PERL language or other any attainable computer languages.
8. it is the hardware system of core component that a kind of method that has the network monitoring data bag of timestamp as claimed in claim 1, the hardware platform that it is characterized in that described data acquisition equipment can be based on hardware system or the DSP that computer that CPU is a core component or FPGA be core component.
9. a kind of method that has the network monitoring data bag of timestamp as claimed in claim 1 is characterized in that described data acquisition equipment is C98IPmon.
10. the described a kind of method that has the network monitoring data bag of timestamp of claim 1, it is characterized in that it can be LAN (Local Area Network) or Ethernet that this method is applied to monitored network, WIFI wireless network or WLAN or comprise self-organizing WLAN MESH network, the second generation or 2G GSM or 2G CMDA mobile communications network, the third generation or 3G mobile communications network, the 4th generation or LTE mobile communications network, Intranet, in the EPON EPON, the GPON EPON, intelligence switched optical network or ASON network, the wireless Internet of Things of ZigBee, the wireless Internet of Things of RFID, the computer networking of PCIe agreement, the Computer Storage networking of storage system agreement Network Based, network based on the networking of cloud computing technology, intelligent grid communication network and dispatch network, network based on satellite communication, network based on microwave communication, Ubiquitous Network.
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