CN105099813A - Data verification method and device based on Ethernet tester - Google Patents
Data verification method and device based on Ethernet tester Download PDFInfo
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- CN105099813A CN105099813A CN201510324980.5A CN201510324980A CN105099813A CN 105099813 A CN105099813 A CN 105099813A CN 201510324980 A CN201510324980 A CN 201510324980A CN 105099813 A CN105099813 A CN 105099813A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/12—Network monitoring probes
Abstract
The invention provides a data verification method and device based on an Ethernet tester. The data verification method based on the Ethernet tester comprises the following steps: determining the type of a testing frame transmitted by a user; and selecting a data verification method corresponding to the type of the testing frame according to the type of the testing frame to verify the testing frame. According to the data verification method and device, the type of the testing frame transmitted by the user is determined, and the data verification method corresponding to the type of the testing frame is selected to verify the testing frame, so that a strategy of dynamically setting the verification method according to the type of a testing frame needing to be transmitted is realized, and full-packet verification of any Ethernet frame can be realized.
Description
Technical field
The present invention relates to data processing field, specifically, relate to a kind of data verification method based on ethernet test instrument and device.
Background technology
Ethernet test instrument is that one is injected into equipment under test for generation of ethernet network flow, and obtains the special test equipment of equipment under test information by analyzing the Ethernet returned from equipment under test.
At present, in the use procedure of ethernet test instrument, sometimes need to carry out verification to whole test frame, be used for detecting ethernet frame and whether be changed in the transmitting procedure of test environment (particularly 2 layers of environment).The method of verification can choose at random, the double byte negate addition that such as IP header check adopts or CRC check.
Fig. 1 shows the whole realization method of the full bag verification when tape test territory, be exactly from the first character joint of bag, before calculating test domain always, namely in figure 101 and 102 part, then the check value calculated (School Affairs) is added on the position of in test domain 103 104, recalculate the check value of full bag verification when receiving test frame and contrast with the check value in test domain, judging whether information is changed.
The method has a problem, if comprise TCP exactly in test pack, ICMP etc. need the agreement to bag content calculation check value, and the cycle calculations situation that just there will be check value causes the full bag verification that cannot realize on conventional meaning.For Transmission Control Protocol, in order to this problem is described, as shown in Figure 2, the packet header of test pack is subdivided into again layer 2-3 packet header 201 and TCP packet header 202,, Transmission Control Protocol requires entirely to wrap verification to TCP bag, and verification scope is as shown in 208, need dynamic calculation TCP check value, and be filled into 205 positions in TCP head.Due to the full bag check value of routine be from the first character joint of bag calculates test domain before a byte, so once TCP check value changes, the full bag check value in test domain also changes thereupon, and then TCP check value needs again to change, full bag check value is caused to change again, so repeatedly.In order to clearly demonstrate, 2 layers that occur herein, 3 layers corresponding to the data link layer in OSI7 layer model and network layer.
In order to solve the problems of the technologies described above, there are two kinds of solutions at present.
The scheme of prior art one:
As shown in Figure 3, ethernet frame itself defines FCS check value, this value is undertaken calculating by each equipment in the transmission path of ethernet frame and adds last four bytes of ethernet frame to, FCS value essence is a kind of CRC check, after each equipment in data path receives an ethernet frame, first check that whether FCS value is correct, if correct, think an effective ethernet frame, intermediate equipment can make any change to this frame, then recalculate FCS value, add last four bytes to and send.
Because FCS value is by each equipment individual inspiration in data path, recalculates this value and add postamble to, even if FCS value also can not be relied on to detect so ethernet frame is changed.
The scheme of prior art two:
As upper-layer protocol (the such as TCP having occurred needing to carry out the verification of protocol package full content, etc. ICMP) time, abandon entirely wrapping verification, bag content authentication part in test domain is filled out 0, whole like this network packet only needs to comprise IP verification, TCP checks etc., there will not be the situation needing cycle calculations.
The shortcoming of this technical scheme is if this ethernet frame contains the such upper-layer protocol of similar TCP, owing to entirely not wrapping verification, is (such as target MAC (Media Access Control) address is changed) can not detected out to some mistake.
For the problem in correlation technique, at present effective solution is not yet proposed.
Summary of the invention
For the problem in correlation technique, the present invention proposes a kind of data verification method based on ethernet test instrument and device.
For realizing above-mentioned technical purpose, according to an aspect of the present invention, a kind of data verification method based on ethernet test instrument is provided.
This data verification method, comprising:
Determine the type of the test frame that user sends;
According to the type of test frame, the data verification method corresponding with the type of test frame is selected to verify test frame.
In addition, when needing to verify the protocol contents except network layer to physical layer of test frame, then only 2 layers of information of test frame are verified.
In addition, when not needing to verify the protocol contents except network layer to physical layer of test frame, then full verification is wrapped to test frame.
In addition, 2 layers of information of test frame are carried out verification and are comprised:
Calculate the check value of test frame, obtain the first check value;
First check value is added in the test domain of test frame;
Receive the test frame that with the addition of the first check value, and calculate the check value of 2 layers of information of this test frame and the check value of full bag verification, obtain the second check value and the 3rd check value respectively;
First check value and the second check value are compared.
In addition, entirely wrap verification to test frame to comprise:
Calculate the check value of test frame, obtain the 4th check value;
4th check value is added in the test domain of test frame;
Receive the test frame that with the addition of the 4th check value, and calculate the check value of 2 layers of information of this test frame and the check value of full bag verification, obtain the 5th check value and the 6th check value respectively;
4th check value and the 6th check value are compared.
In addition, according to the type of the test frame that user selects, obtain the verification type corresponding with the type of test frame in a register and verify coverage, in register, storing the verification type that test frame is verified, and the verification coverage that often kind of verification type is corresponding.
According to a further aspect in the invention, a kind of data calibration device based on ethernet test instrument is provided.
This data calibration device, comprising:
Determination module, for determining the type of the test frame that user sends;
Correction verification module, for the type according to test frame, selects the data verification method corresponding with the type of test frame to verify test frame.
In addition, correction verification module is further used for, and when needing to verify the protocol contents except network layer to physical layer of test frame, then only verifies 2 layers of information of test frame.
In addition, correction verification module is further used for, and when not needing to verify the protocol contents except network layer to physical layer of test frame, then entirely wraps verification to test frame.
In addition, correction verification module comprises further:
First calculating sub module, for calculating the check value of test frame, obtains the first check value;
First adds submodule, for being added in the test domain of test frame by the first check value;
First receives submodule, for receiving the test frame that with the addition of the first check value;
Second calculating sub module, the check value that check value and full bag for calculating 2 layers of information of this test frame verify, obtains the second check value and the 3rd check value respectively;
First comparison sub-module, for comparing the first check value and the second check value.
In addition, correction verification module comprises further:
3rd calculating sub module, for calculating the check value of test frame, obtains the 4th check value;
Second adds submodule, for being added in the test domain of test frame by the 4th check value;
Second receives submodule, for receiving the test frame that with the addition of the 4th check value;
4th calculating sub module, the check value that check value and full bag for calculating 2 layers of information of this test frame verify, obtains the 5th check value and the 6th check value respectively;
Second comparison sub-module, for comparing the 4th check value and the 6th check value.
In addition, acquisition module, for the type of test frame selected according to user, obtain the verification type corresponding with the type of test frame in a register and verify coverage, the verification type that test frame is verified is stored in register, and the verification coverage that often kind of verification type is corresponding.
The present invention is by determining the type of the test frame that user sends, the data verification method corresponding with the type of test frame is selected to verify test frame, achieve the type of the test frame according to required transmission, the strategy of dynamic setting method of calibration, thus can realize entirely wrapping verification to any ethernet frame.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the Frame of full bag verification in prior art;
Fig. 2 is the structural representation of the test frame containing Transmission Control Protocol of full bag verification in prior art;
Fig. 3 is the structural representation defining the test frame of FCS verification of the prior art;
Fig. 4 is the structural representation of the ethernet test frame according to the embodiment of the present invention;
Fig. 5 is the flow chart of the data verification method based on ethernet test instrument according to the embodiment of the present invention;
Fig. 6 is the block diagram of the data verification method device based on ethernet test instrument according to the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain, all belongs to the scope of protection of the invention.
Fig. 4 is the structural representation of the ethernet test frame according to the embodiment of the present invention.This network packet comprises: 2 layers of information, 3 layers of information, 4 layers of information and 4 layers of payload.For typical TCP/IP network, as shown in Figure 4, IP layer has IP head to verify, its verification scope covers IP head, TCP has TCP check, and its verification scope covers the whole part of TCP bag, so for such network packet, when carrying out full bag verification, the part of its disappearance also only has 2 layers of information.If therefore test is surrounded by the situation that TCP etc. needs to verify whole protocol contents, the check value (only carrying out the verification of 2 layers of information) of 2 layers of check information is then only comprised in the check value part of test domain, otherwise just carry out conventional full bag verification, verification scope is that packet header adds payload.
According to described above, The embodiment provides a kind of data verification method based on ethernet test instrument.
As shown in Figure 5, comprise according to the data verification method based on ethernet test instrument of the embodiment of the present invention:
Step S501, determines the type of the test frame that user sends;
Step S503, according to the type of test frame, selects the data verification method corresponding with the type of test frame to verify test frame.
Wherein, when needing to verify the protocol contents except network layer to physical layer of test frame, then only 2 layers of information of test frame are verified, as the situation containing Transmission Control Protocol in test pack.This kind of situation can be marked as the first situation, it corresponds to the type of the first test frame.
In addition, when not needing to verify the protocol contents except network layer to physical layer of test frame, then full verification is wrapped to test frame.This kind of situation can be marked as the second situation, it corresponds to another kind of dissimilar test frame, shows as the second test frame.
Wherein, when verifying the test frame of the first type, verification being carried out to 2 layers of information of test frame and comprises:
Calculate the check value of test frame, obtain the first check value;
First check value is added in the test domain of test frame;
Receive the test frame that with the addition of the first check value, and calculate the check value of 2 layers of information of this test frame and the check value of full bag verification, obtain the second check value and the 3rd check value respectively;
First check value and the second check value are compared.
In addition, when verifying the test frame of the second type, namely the step that test frame carries out when full bag verifies is comprised:
Calculate the check value of test frame, obtain the 4th check value;
4th check value is added in the test domain of test frame;
Receive the test frame that with the addition of the 4th check value, and calculate the check value of 2 layers of information of this test frame and the check value of full bag verification, obtain the 5th check value and the 6th check value respectively;
4th check value and the 6th check value are compared.
In addition, the type of the test frame can selected according to user in the process of type determining test frame, obtain the verification type corresponding with the type of test frame in a register and verify coverage, the verification type that test frame is verified is stored in this register, and the verification coverage that often kind of verification type is corresponding.
In order to can understanding technical scheme of the present invention clearly, with specific embodiment, technical scheme of the present invention be further elaborated below.
The method that technical scheme of the present invention can be combined by soft or hard realizes.For realizing the present invention, a bag verification control register entirely must be defined in the hardware system of tester, this register comprises the scope that the type of verification and verification coverage corresponding to each verification type and verification cover, wherein verifying type can by the position that verifies test frame as differentiation, as only incited somebody to action, carrying out verification to 2 layers of information is defined as the first kind, and the verification coverage of its correspondence is the position of 2 layers of information or front 14 bytes; To entirely wrap verification and be defined as Second Type, the verification coverage of its correspondence is head and payload or whole bag.
Concrete steps can be implemented as follows:
1. user selects the required test ethernet frame type sent at software interface;
2. software arranges full bag verification control register according to the test frame type that user selects;
3. hardware verifies the type calculation check value of control register according to full bag and adds in test domain;
4. tester can calculate two kinds of School Affairs in receiving course simultaneously, and a kind of is the School Affairs of 2 layers of information, and a kind of is the School Affairs of full bag verification, then selects corresponding with test domain one according to the setting in test domain;
5. the School Affairs calculated in step 4 is compared with the School Affairs in test domain, judge whether ethernet frame is changed in transmitting procedure.
According to embodiments of the invention, additionally provide a kind of data calibration device based on ethernet test instrument.
As shown in Figure 6, comprise according to the data calibration device based on ethernet test instrument of the embodiment of the present invention:
Determination module 61, for determining the type of the test frame that user sends;
Correction verification module 62, for the type according to test frame, selects the data verification method corresponding with the type of test frame to verify test frame.
In addition, correction verification module 62 is further used for, and when needing to verify the protocol contents except network layer to physical layer of test frame, then only verifies 2 layers of information of test frame.
In addition, correction verification module 62 is further used for, and when not needing to verify the protocol contents except network layer to physical layer of test frame, then entirely wraps verification to test frame.
In addition, correction verification module 62 comprises further:
First calculating sub module (not shown), for calculating the check value of test frame, obtains the first check value;
First adds submodule (not shown), for being added in the test domain of test frame by the first check value;
First receives submodule (not shown), for receiving the test frame that with the addition of the first check value;
Second calculating sub module (not shown), the check value that check value and full bag for calculating 2 layers of information of this test frame verify, obtains the second check value and the 3rd check value respectively;
First comparison sub-module (not shown), for comparing the first check value and the second check value.
In addition, correction verification module 62 comprises further:
3rd calculating sub module (not shown), for calculating the check value of test frame, obtains the 4th check value;
Second adds submodule (not shown), for being added in the test domain of test frame by the 4th check value;
Second receives submodule (not shown), for receiving the test frame that with the addition of the 4th check value;
4th calculating sub module (not shown), the check value that check value and full bag for calculating 2 layers of information of this test frame verify, obtains the 5th check value and the 6th check value respectively;
Second comparison sub-module (not shown), for comparing the 4th check value and the 6th check value.
In addition, this device can also comprise:
Acquisition module (not shown), for the type of test frame selected according to user, obtain the verification type corresponding with the type of test frame in a register and verify coverage, the verification type that test frame is verified is stored in register, and the verification coverage that often kind of verification type is corresponding.
To sum up, by means of technique scheme of the present invention, by determining the type of the test frame that user sends, the data verification method corresponding with the type of test frame is selected to verify test frame, achieve the type of the test frame according to required transmission, the strategy of dynamic setting method of calibration, thus can realize entirely wrapping verification to any ethernet frame.
These are only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. based on a data verification method for ethernet test instrument, it is characterized in that, comprising:
Determine the type of the test frame that user sends;
According to the type of described test frame, the data verification method corresponding with the type of described test frame is selected to verify described test frame.
2. method according to claim 1, is characterized in that, when needing to verify the protocol contents of described test frame except network layer to physical layer, then only verifies 2 layers of information of described test frame.
3. method according to claim 1, is characterized in that, when not needing to verify the protocol contents of described test frame except network layer to physical layer, then entirely wraps verification to described test frame.
4. method according to claim 2, is characterized in that, described 2 layers of information to described test frame are carried out verification and comprised:
Calculate the check value of described test frame, obtain the first check value;
Described first check value is added in the test domain of described test frame;
Receive the test frame that with the addition of described first check value, and calculate the check value of 2 layers of information of this test frame and the check value of full bag verification, obtain the second check value and the 3rd check value respectively;
Described first check value and described second check value are compared.
5. method according to claim 3, is characterized in that, describedly entirely wraps verification to described test frame and comprises:
Calculate the check value of described test frame, obtain the 4th check value;
Described 4th check value is added in the test domain of described test frame;
Receive the test frame that with the addition of described 4th check value, and calculate the check value of 2 layers of information of this test frame and the check value of full bag verification, obtain the 5th check value and the 6th check value respectively;
Described 4th check value and described 6th check value are compared.
6. method according to claim 1, is characterized in that, comprises further:
According to the type of the described test frame that described user selects, obtain the verification type corresponding with the type of described test frame in a register and verify coverage, the verification type that described test frame is verified is stored in described register, and the verification coverage that often kind of verification type is corresponding.
7. based on a data calibration device for ethernet test instrument, it is characterized in that, comprising:
Determination module, for determining the type of the test frame that user sends;
Correction verification module, for the type according to described test frame, selects the data verification method corresponding with the type of described test frame to verify described test frame.
8. device according to claim 7, it is characterized in that, described correction verification module is further used for, and when needing to verify the protocol contents of described test frame except network layer to physical layer, then only verifies 2 layers of information of described test frame.
9. device according to claim 7, is characterized in that, described correction verification module is further used for, and when not needing to verify the protocol contents of described test frame except network layer to physical layer, then entirely wraps verification to described test frame.
10. device according to claim 8, is characterized in that, described correction verification module comprises further:
First calculating sub module, for calculating the check value of described test frame, obtains the first check value;
First adds submodule, for being added in the test domain of described test frame by described first check value;
First receives submodule, for receiving the test frame that with the addition of described first check value;
Second calculating sub module, the check value that check value and full bag for calculating 2 layers of information of this test frame verify, obtains the second check value and the 3rd check value respectively;
First comparison sub-module, for comparing described first check value and described second check value.
11. devices according to claim 9, is characterized in that, described correction verification module comprises further:
3rd calculating sub module, for calculating the check value of described test frame, obtains the 4th check value;
Second adds submodule, for being added in the test domain of described test frame by described 4th check value;
Second receives submodule, for receiving the test frame that with the addition of described 4th check value;
4th calculating sub module, the check value that check value and full bag for calculating 2 layers of information of this test frame verify, obtains the 5th check value and the 6th check value respectively;
Second comparison sub-module, for comparing described 4th check value and described 6th check value.
12. devices according to claim 7, is characterized in that, comprise further:
Acquisition module, for the type of described test frame selected according to described user, obtain the verification type corresponding with the type of described test frame in a register and verify coverage, the verification type that described test frame is verified is stored in described register, and the verification coverage that often kind of verification type is corresponding.
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