CN102118230A - Tree and tabular combined notation (TTCN)-based network protocol performance testing method - Google Patents
Tree and tabular combined notation (TTCN)-based network protocol performance testing method Download PDFInfo
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Abstract
The invention discloses a tree and tabular combined notation (TTCN)-based network protocol performance testing method, which comprises the following steps of: (1) writing test cases, corresponding adapters and corresponding codecs, and selectively designing test control messages in the test cases according to test objects; (2) selecting the test case according to network protocol performance parameters to be tested; (3) performing test configuration according to the test case; (4) compiling the test case by adopting a TTCN platform, and registering the adapter and the codec by using a testing system; (5) running the test case and acquiring test records; and (6) performing record counting analysis on the test, and giving a performance test report. The method is applied to ordinary protocol performance tests; and in the method, a protocol performance testing process is put forward and normalized, and simultaneously a control protocol is selectively applied to the TTCN-based protocol performance test so as to reduce difficulties in the protocol performance test and improve the understandability and reusability of the test.
Description
Technical field
The present invention relates to the software test field, be specifically related to the performance test field in a kind of network communication protocol test.
Background technology
Procotol is to carry out information exchange between the computer system and a kind of agreement that must observe jointly, and the network service of any kind all be unable to do without the support of concrete procotol.Since TCP/IP protocol suite becomes the international standard of the Internet fact, new network is used constantly and is occurred.
The function of procotol can realize by software or hardware.Most of procotol standard documents have for example comprised the RFC series standard that Internet goes up nearly all important protocol, employing be that artificial language is described.The engineering staff different agreement realization bodies will occur for the different understanding of same set of network protocols.Simultaneously, consider the various complexity of the content of procotol own, greatly may exist function incomplete, the product under the contract of mistake very can occur.Therefore, before the product under the contract scale that has high input is used, tackle them and test.Here it is protocol test.From test-types, protocol test comprises uniformity test, HIST, robustness test, performance test, and the test purpose of each type test has nothing in common with each other.The purpose of uniformity test is in order to check agreement to realize the description whether the agreement stipulations are followed in strictness.The research of this respect is carried out the earliest, is the main contents of protocol test research always, and has formed international testing standard series ISO/IEC 9646---the method and the framework of uniformity test.HIST is used for verifying same agreement, and interaction data correctly between the different editions agreement realizes is the important means that ensures in the whole communication system from the various device proper communication of different vendor.Robustness test mainly is that the robustness test is checking the disposal ability of tested realization to the influential various abnormal conditions of its generation, and ability that still can operate as normal after finishing dealing with is a target.The protocol capabilities test purpose is the performance parameter of the tested realization of test under different offered loads, sees whether it has reached relevant performance index.The protocol capabilities index is the important parameter whether the protocol service quality satisfies application demand.At present, the protocol capabilities Research of measuring also is in the starting stage, the recognised standard that neither one is unified, and content measurement for the protocol capabilities test, method of testing, test configurations and test parameter etc. all do not have definition, and these all are the problems that solution is needed in the protocol capabilities test badly.
Based on above background, the present invention proposes a kind of procotol performance test methods based on TTCN.This method is applicable to the general protocol performance test, propose and standard the protocol capabilities test process, simultaneously control protocol is selectively used for the test of TTCN protocol capabilities, reduced the protocol capabilities difficulty of test, increase the intelligibility of test, improved the rate of reusing of test suite.
Summary of the invention
The objective of the invention is to propose a kind of procotol performance test methods based on TTCN, this method is tested at content measurement at protocol capabilities, method of testing, under the situation that test configurations and test parameter etc. all clearly do not define, propose and standard the protocol capabilities test process, simultaneously TTCN is applied to the protocol capabilities test, has reduced the protocol capabilities difficulty of test, improved the rate of reusing of test suite.
For achieving the above object, a kind of procotol performance test methods based on TTCN provided by the invention comprises following steps:
Step 1) is write test case and corresponding adapter and codec at the talk various network protocols performance parameter; Described test case adopts the TTCN language compilation, and mutual and tested agreement does not have this interactive function if test case needs to test between test macro and system under test (SUT) control, and then test case includes the test control message of realizing this interactive function;
Step 2) chooses test case according to procotol performance parameter to be measured;
Step 3) is carried out test configurations according to test case;
The step 4) test macro adopts TTCN platform compiling test case, registration adapter and codec;
Step 5) operation test case is obtained test record;
Step 6) provides the performance test report to the test record statistical analysis.
The control protocol message comprises field in the described step 1) mutual control information, the affiliated protocol layer of tested agreement, message length, test data and test feedback data.Mutual control information is used to indicate the beginning tested between test macro and system under test (SUT), carries out and stops; Protocol layer is used to represent which layer of tested agreement at protocol stack under the tested agreement, such as worker P layer, transport layer, application layer etc.; Message length is represented performance test control protocol message total length (comprising header length and data division length); Test data is the basic data of performance evaluation with the test feedback data, according to concrete tested object flexibly customizing.Can the design test test serial number and send data packet number as test data in the performance test of udp protocol packet loss, the test feedback data can be designed as receives data packet number.The test packet sequence number is used to indicate the sequence number that is sending test packet, the meaning that has the statistical test message total simultaneously, send total test packet quantity that data packet number is used to indicate the preparation transmission, receive the test packet quantity that data packet number sign system under test (SUT) is received.
Described step 1) and step 2) in network performance parameter realize that from protocol capabilities standard, functional specification and agreement statement is definite.The procotol performance parameter comprises packet loss, time-delay, throughput and ratio of error etc.
TTCN is a kind of test language that is similar to high-level programming language in described step 1) and the step 4), has very powerful and grammatical and semantic rule flexibly.The present invention is applied to protocol capabilities test with TTCN, utilized TTCN test record expression, test architecture is described and three of measuring executing process aspect the statement ability.TTCN has abundant basic language element, and perfect program statement and action statement are supported the description of various behavioral tests.Data type is used to define the type of test record; Data template is used to define concrete test record structure; Test suite and communication port definition can be described test architecture.Can utilize the implementation of test cases of execution (execute) statement in the TTCN module controls part.The encoding and decoding of communication data between realize codec test macro and tested agreement realize.Adapter is responsible for the communication interface between conversion testing system and the realization of tested agreement, realizes communicating by letter between test macro and the realization of tested agreement.
Test configurations comprises the network configuration between configuration, test macro and the system under test (SUT) of configuration, system under test (SUT) of test macro in the described step 3).The configuration of test macro comprises the configure host network interface card, and worker's P address of test macro, test macro port are provided with, and the system under test (SUT) port is provided with etc.; The configuration of system under test (SUT) comprises opens corresponding port etc.; Test macro comprises the network link that is connected between system under test (SUT) and the system under test (SUT) with network configuration between system under test (SUT).
Procotol performance test methods based on TTCN of the present invention, standard the protocol capabilities test process; By introducing the test control protocol, remedy some procotol and in the performance test process, do not possessed the restriction of testing interactive function, increased the intelligibility of test; Utilize TTCN to realize test suite, can reduce the protocol capabilities difficulty of test, improve the rate of reusing of test suite.The performance test methods that control protocol is tested in above-mentioned introducing based on the TTCN language has stronger universality in the performance test of procotol.
Description of drawings
Fig. 1 is the test flow chart of a kind of procotol performance test methods based on TTCN of the present invention;
Fig. 2 is a DHCP request response time performance test control protocol message example;
Fig. 3 is a DHCP request response time performance test control protocol implementation schematic diagram, and display protocol is carried out the message of exchange;
Fig. 4 is the performance test control protocol message example of udp protocol packet loss;
Fig. 5 is the performance test control protocol implementation schematic diagram of udp protocol packet loss, and display protocol is carried out the message of exchange.
Embodiment
For concrete implementation and the application of control protocol message in the protocol capabilities test that more clearly embodies the procotol performance test methods that the present invention is based on TTCN, introduce the test control message design of three representative performance test cases herein, and a kind of test process of performance test case wherein is elaborated.
In the test of TCP connection response time performance, do not need to design control protocol,, itself have mutual function because Transmission Control Protocol is a kind of Connection-oriented Protocol.In test lead comes statistical test system and tested system by SYN in the TCP handshake procedure and SYN_ACK message the TCP connection response time.The performance test of DHCP agreement and udp protocol need design control protocol, because these two kinds of agreements do not have interactive function.But because the difference of tested object, therefore the control protocol of design has the part difference.
Introduce the test control message example and the control protocol implementation of performance test of DHCP request response time and the performance test of UDP packet loss below respectively.
Fig. 2 is a DHCP request response time performance test control protocol message example.Wherein transmitting time is the test data part, and time of reception and feedback transmitting time are the feedback test data divisions by tested end structure.Fig. 3 is a DHCP request response time performance test control protocol implementation schematic diagram.Test lead at first sends test request message (TRM) (0x01), this message carries the information of test lead transmitting time, tested end (Dynamic Host Configuration Protocol server) feeds back a test response message (0x02) after receiving above-mentioned 0x01 message, wherein carry the test lead transmitting time, tested termination reaches the feedback transmitting time between the time receiving, test lead is received behind this message can obtain the omnidistance response time by analyzing, the service end processing time, and provide the test report of request response time performance test.
Fig. 4 is a UDP packet loss performance test control protocol message example.Test data comprises and sends sequence number and send the total digital section of packet, tested termination between the time receiving and tested end feedback transmitting time be the feedback test data.
Be that example illustrates its control protocol design, execution and integrated testability process with the performance test of UDP packet loss below.With reference to figure 1, concrete implementation step is as follows:
(1) writes test case and corresponding adapter and codec at the performance parameter of procotol udp protocol.This test case needs to test between test macro and system under test (SUT) the mutual and tested agreement UDP of control and does not have this interactive function, therefore need add test control message in test case.Test case TTCN-3 language compilation, corresponding adapter and codec are write with C# language.Test case need be write UDPTest_Type.ttcn3, UDPTest_Template.ttcn3, four files of UDPTest_Function.ttcn3 and UDPTest_Testcases.ttcn3.Adapter need be write UDPSendsocket.cs respectively, StimulusAdapter.cs and ResponseAdapter.cs file.Codec need be write the UDPTestCodec.cs file.
(2) choose test case UDPTest_losePacket according to procotol UDP packet loss performance parameter to be measured.
(3) carry out test configurations according to test case.Test configurations comprises the network configuration between configuration, test macro and the system under test (SUT) of configuration, system under test (SUT) of test macro.The configuration of test macro comprises the configure host network interface card, the IP address of test macro, the udp port of test macro, the udp port of system under test (SUT); The configuration of system under test (SUT) comprises opens the corresponding to udp port of system under test (SUT) udp port system under test (SUT) and test system configurations, and loads the application program of response control protocol message; Test macro comprises the network link that is connected between test macro and the system under test (SUT) with network configuration between system under test (SUT).
(4) test macro adopts TTCN-3 platform compiling test case, registration adapter and codec.Compiling includes 4 TTCN-3 file UDPTest_Type.ttcn3, UDPTest_Template.ttcn3, UDPTest_Function.ttcn3 and UDPTest_Testcases.ttcn3 of test case.The registration of adapter and codec needs earlier the C# file of writing in (1) to be compiled into the .dll file, registers StimulusAdapter.dll and UDPTestCodec.dll then respectively.
(5) the operation test case is obtained test record; Operation test case UDPTest_losePacket.
(6) statistical analysis is carried out in test record, drawn the test result of performance parameter, submit test report to.
At UDP packet loss test case design performance test control protocol (PTCP), message format as shown in Figure 4 in step (1).Wherein control field accounts for a byte, be used to indicate the beginning tested between test macro and system under test (SUT), carry out and stop, optional value comprises and begins test (0x01), carries out test (0x02), unexpectedly stops test (0x03), normal termination test (0x04) that other control field can be self-defined; Byte of protocol layer fields account is used to represent which layer of tested agreement at protocol stack, and UDP is in transport layer, and this field value is 0x03; 2 bytes of message length fields account, expression performance test control protocol message total length (comprising header length and data division length); Test data comprises and sends sequence number and send the total digital section of packet.Sending sequence number accounts for 2 bytes, is used to indicate the sequence number that is sending test packet; Send 2 bytes of packet sum fields account, the expression expection sends the number of test pack; The feedback test data comprise feedback data packet quantity.Feedback data packet quantity accounts for 2 bytes, the test packet sum that the expression system under test (SUT) receives.
With reference to figure 5, UDP packet loss performance test control protocol implementation is as follows:
1) test lead sends the UDP message at port A to the port B of tested end, wherein UDP message partly is that the control field of performance test control protocol message is 0x01, sending sequence number is 0, sends the number that the quantity of data packets field is filled test pack, requires tested end to provide response.
2) tested end is after port B listens to the UDP message bag, the performance test control protocol message of judgment data part, if source port is A, control field is 0x01, send sequence number is 0, the data extract that then will send in the quantity of data packets field is preserved, and the port A to test lead sends response message simultaneously, and sending sequence number in the message still is set to 0.
3) after test lead is received the response message of B at port A, begin to send test packet, wherein control field is set to 0x02, test lead continues to send the UDP message bag to B, needn't wait for the response of B, sending sequence number since 1 counting of test pack reaches the predetermined set total quantity up to the total quantity that sends bag.If this moment, tested end only needed to monitor from the UDP message bag of A and judge control field 0x02 at port B, then continue to judge to send sequence number, if send sequence number 1～total data packet number between, then counting variable count counting is once.If control field is 0x03, transmission stops the test response message, and wherein control field is set to 0x03, sends the quantity of data packets field and fills the packet that tested termination is received.
4) after test lead sends the UDP test pack, send the UDP message bag of a normal termination test, wherein control field is set to 0x04, sends sequence number to be set to maximum 65535, requires the other side to provide response.After tested termination is received this packet, send response message, wherein control field is set to 0x04, and the total test packet quantity that receives is filled into the feedback data field.
5) after test lead received and stops the test response message, test lead and tested end stopped test packet and send, and carry out the calculating of packet loss, and display result, finish test.
When above-mentioned performance test control protocol designed, the maximum quantity of test packet was 65535, and for the packet loss performance test, this quantity should be enough.The size of each packet can be provided with equally, and its maximum depends on the maximum length of packet that network allows.The big or small Packet Size of the quantity Packet Number of test pack and each test pack has determined test load jointly. first notification data newspaper in the above-mentioned method of testing and last end data newspaper are owing to adopt UDP, may lose, the result causes test overtime.This lose to offer for first data say loss and little, but for last packet, lose bigger because the packet loss test has expended the many resources of network since last data-bag lost that all that has been achieved is spoiled is then very to one's profit.Improved way is exactly that last datagram takes to lose retransmission mechanism, guarantees that the result who tests correctly receives.
Realize UDP performance test cover with TTCN-3, wherein comprise above-mentioned UDP packet loss performance test case.Be written into test suite, select UDP packet loss test case, carry out test configurations, carry out test, can obtain udp protocol packet loss test result, as shown in table 1, comprising the testing time, content measurement and test result.
Table 1UDP packet loss test report
Claims (4)
1. the procotol performance test methods based on TTCN is characterized in that, comprises following steps:
Step 1) is write test case and corresponding adapter and codec at the talk various network protocols performance parameter; Described test case adopts the TTCN language compilation, and mutual and tested agreement does not have this interactive function if test case needs to test between test macro and system under test (SUT) control, and then test case includes the test control message of realizing this interactive function;
Step 2) chooses test case according to procotol performance parameter to be measured;
Step 3) is carried out test configurations according to test case;
The step 4) test macro adopts TTCN platform compiling test case, registration adapter and codec;
Step 5) operation test case is obtained test record;
Step 6) provides the performance test report to the test record statistical analysis.
2. procotol performance test methods according to claim 1 is characterized in that, described test control message comprises field to be had: protocol layer, message length, test data and test feedback data under mutual control information, the tested agreement.
3. procotol performance test methods according to claim 1 is characterized in that, described procotol performance parameter comprises packet loss, time-delay, throughput and ratio of error.
4. according to claim 1 or 2 or 3 described procotol performance test methods, it is characterized in that described step 3) test configurations comprises the network configuration between configuration, test macro and the system under test (SUT) of configuration, system under test (SUT) of test macro.
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