CN1514586B - Testing method of data communication equipment of imitating multiuser, multi connection - Google Patents
Testing method of data communication equipment of imitating multiuser, multi connection Download PDFInfo
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- CN1514586B CN1514586B CN021399239A CN02139923A CN1514586B CN 1514586 B CN1514586 B CN 1514586B CN 021399239 A CN021399239 A CN 021399239A CN 02139923 A CN02139923 A CN 02139923A CN 1514586 B CN1514586 B CN 1514586B
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Abstract
The system includes computers at client ends, computers at server ends, communication network built and network cards installed at client and server ends for communication connection. The method includes following steps: testing network initialization; using ARP request to parse MAC address of gateway device; bulding up TCP connection between client end and server end; sending TCP data message to server end; the server end answering back the said TCP data message to carry out testing data communication devices; finishing testing, based on TCP connection built, sanding message to serever end to disconnect TCP connection. In the invention, testing can be carried out fully when number of users and number of connections for a device to be tested are close to limit or exceed system limit. The invention possesses features of low testing cost, easy of implementation, and expansible quantity of device.
Description
Technical field
The present invention relates to data communications equipment, particularly relate to a kind of in the laboratory simulates real real data network communication environment, multi-user, multi-link data communications equipment test macro and method.
Background technology
When the data communication apparatus is tested, the method that the tester adopts usually is that a computer or several computers are connected, carry out transfer of data between each computer, disconnect connection, so circulate repeatedly, by the test of relatively finishing data communications equipment to the transmission data.But, use this method, if want to simulate multi-user's situation, just need multiple computers, and in the laboratory, because the restriction of condition, the user that the method for this routine will be simulated is subjected to the restriction of hardware condition, can operate as normal as surpass 100 o'clock systems at number of users, number of users surpasses 1000 o'clock system works what states, more impossiblely do abundant test and can or can not collapse when number average surpasses system limits with being connected at number of users, performance during the multi-user is as how, because it is unpractical testing in the laboratory with 1000 or more computer simultaneously, and the direct result of not doing limit test is, equipment is when approaching the limit or surpassing system limits, cause system crash probably, consequence and economic loss are self-evident;
On the other hand, some tester manufacturer has also made some special-purpose testers, can send specific message, but the situation of these instrument simulations is different with real network environment.When a real user works on network, being a different set of message organically combines by the linking between specific transmitting-receiving order and the correct message, finish the task that a user carries out, and the segment of existing tester in can only simulation process, can not simulate the whole operation process that the user carries out, so be incomplete the test of equipment under test.And these special-purpose testers, cost an arm and a leg, usually all at 1,000,000 yuan to millions of units.
Summary of the invention
The objective of the invention is with desktop computer and network interface card, simulate multi-user and the multi-link truth of on network, moving simultaneously, the whole process that the multi-user works on network is simulated, thus to tested equipment number of users and linking number near the limit or the situation when surpassing system limits test fully.
In order to achieve the above object, the invention provides a kind of multi-user of simulation, multi-link data communications equipment test macro, it comprises as the computer of client with as the computer of server end, tested data communications equipment, and the communication network of being formed, and the network interface card that communication connects that is used for that is installed in described client and server end.
The present invention also provides a kind of multi-user of simulation, multi-link data communications equipment method of testing, and this method may further comprise the steps:
(1) test network initialization;
(2) utilize the ARP request message, be resolved to the MAC Address of data communications equipment;
(3) foundation is connected with the TCP of service end;
(4) client sends the tcp data message to service end;
(5) service end is responded described tcp data message, carries out the test of data communications equipment;
(6) if the unit maximum number of connections that the TCP linking number that the current source MAC of customer end adopted and source IP address are set up is stipulated less than test macro, then keeping under the constant situation of source IP address, purpose IP address, change source tcp port number and purpose tcp port number in the TCP insulation, and repeating step (3) is to step (5);
(7) if user's network interface card number of client simulation less than system's designated value, then changes source MAC and source IP address, circulation execution in step (2) is to step (5); And
(8) test finishes, and connects according to the TCP that has set up, and client sends to service end and removes TCP connection message;
Adopt method of testing provided by the invention that the whole process that the multi-user works on network is simulated, thereby to tested equipment number of users and linking number near the limit or the situation when surpassing system limits test fully, only need cheap desktop computer and network interface card to get final product, testing cost is low, it is convenient to realize, and the quantity that can expand equipment under test at any time, easily.
Be elaborated with reference to accompanying drawing below in conjunction with embodiment, so that purpose of the present invention, feature and advantage are had more deep understanding.
Description of drawings
Fig. 1 shows test environment figure of the present invention.
Fig. 2 shows the detail flowchart that the present invention realizes.
Fig. 3 shows the data link layer message format that the present invention can support.
Embodiment
Fig. 1 is a test system environment figure of the present invention, and at first this test macro needs two computers respectively as client computer 101 and the testing server 103 tested.On the test client computer, will produce multi-user and multi-link, and testing server is used for the connection request of client computer is responded; When carrying out the test of data communications equipment 102 (hereinafter to be referred as equipment), client-server is not limited to two computers, simultaneously many computers can be arranged, constitute client-server in twos, as long as the initial configuration parameter of correct Configure Client does not cause the situation of configuration parameter conflict to occur getting final product.This data communications equipment 102 refers to can be as the gateway devices such as router of gateway use.Network interface card on client-server requires to support promiscuous mode.For example, according to the difference of tested equipment interface, the network interface card of mentioning among the present invention can be 10M network interface card, 100M network interface card or PCI-Express.
Fig. 2 is a detail flowchart of the present invention, has comprised the detailed process of technical solution of the present invention.
Below in conjunction with Fig. 2 implementation procedure is described in detail:
Many functions that data communications equipment provides as ARP, TCP, NAT, VLAN, routing function etc., all can be listed clear and definite performance index, and these indexs have determined the network size that this communication apparatus can be built.Usually the index that provides comprises the maximum TCP linking numbers that can support how many Ethernets to insert user, single user permission at most, total TCP linking number that equipment is supported, the data link layer frame format of support etc., and the present invention also needs test various parameters recited above.
For the client of test macro, details are as follows for its operating process:
The running parameter of configuration testing system at first, step 201c.Parameter type specifically comprises following content:
(1) configuration ethernet frame type,
Among the present invention, can support three kinds not with the data link layer frame format (referring to Fig. 3) of VLAN mark:
(a) Ethernet II frame format;
(b) has the IEEE802.3 ethernet frame format of 802.2 logic link controls;
(c) IEEE802.3 subnetwork access protocol (Ethernet SNAP);
If tested equipment supported vlans function, then can construct the data link layer frame format that has the VLAN mark, can support to have above-mentioned three kinds of frame formats of VLAN mark, can send the frame format that has the VLAN mark by common network interface card like this, and not need communication apparatus with other.
(2) single user's of the online machine quantity Count of emulation and emulation maximum TCP linking number MaxNum is wanted in configuration, and so, the maximum number of connections that test macro of the present invention can be simulated is the product of Count and MaxNum;
(3) configuration network interface card initial MAC Address sMAC (uchar sMAC[6], sMAC[6] expression 6 octets byte arrays, attention: sMAC increases progressively the new MAC Address of generation can not be identical with other any MAC Address of equipment under test, otherwise can cause the unusual of tested equipment); If the frame type supported vlans function of configuration then disposes VLANID, in all following frame messages make up, need frame by this VLANID structure VLAN, message format is seen Fig. 3, below narrates part omitted;
(4) configuration network interface card start ip address sIP (uchar sIP[4], sIP[4] expression 4 octets byte arrays, the Port IP address that links to each other with equipment under test should be at the same network segment, and sIP[3] greater than last byte of Port IP address, avoid in tested system the IP address that duplicates);
(5) dispose the gateway ip address GWIP of this network interface card correspondence;
(6) the IP address SvrIP of the server that will visit of configuration;
(7) the initiating terminal slogan sPort and the destination slogan dPort of configuration TCP connection;
(8) after configuration TCP connection is set up successfully, the tcp data message number DataNum of transmission;
(9) if configuration timeout interval Timeout at Timeout then, does not capture the appointment message that returns, and then abandons catching of this message.
The working method of network interface card is arranged on promiscuous mode, step 202c;
Then, by the parameter of configuration, structure ARP request message is to resolve the MAC Address of the gateway device that disposes, step 203c; Source MAC wherein and source IP address are all inequality in each ARP request message, and the two combines unique user that determines.If the port supported vlans function of equipment under test is then constructed all ethernet frame formats according to the data link layer frame format that has the VLAN mark in the accompanying drawing 3.
Then, send the ARP request message, and the contact conditions of ARP back message using is set, to capture the back message using of the ARP request message that sends, step 204c; When the contact conditions of network interface card frame is set, guarantee that this condition can capture unique correct arp response message, so just can obtain the MAC Address of the corresponding port of gateway device;
Under the situation about remaining unchanged in the IP address of the test computer (hereinafter to be referred as testing server) of source MAC and source IP address, the gateway device MAC Address that is resolved to, another emulating server, set up TCP and connect message, connect the three-way handshake mechanism of setting up according to TCP, pass through equipment under test, send correct TCP message to testing server, connect to set up TCP, simultaneously after each TCP message sends, the contact conditions of ethernet frame is set, and catch the ethernet frame that contains correct TCP back message using, step 205c;
After testing server is received the TCP message, connect the requirement of setting up according to TCP and respond correct message, the TCP successful connection is set up, and sends the tcp data message of specifying number; The filtercondition of corresponding TCP back message using is caught in setting, and catches back message using, step 206c;
If the unit maximum number of connections that the TCP linking number that adopts current source MAC and source IP address to set up is stipulated less than test macro, then keeping under the constant situation of source IP address, purpose IP address, change source tcp port number and purpose tcp port number in the TCP head, step 207c; Note, in test macro of the present invention and method, the tcp port number of forbidding known protocol, the port numbers 21 that connect as FTP etc. can be carried out special processing to these messages because the device network that has is professional,
If user's network interface card number of simulation then changes source MAC and source IP address among the step 203c, step 208c less than system's designated value;
Test finishes, and connects according to the TCP that has set up, and sends out to the Server end and removes TCP connection message, step 209c.
For the server end of test macro, details are as follows for its operating process:
At first carry out the initialization of test macro, and the working method of network interface card is set to promiscuous mode, step 201s; Then according to receive from the TCP connection request message of setting up among the client step 205c, according to the three-way handshake mechanism that TCP connect to set up, return correct TCP response message to client, with client between set up TCP and be connected step 202s; Server end is responded the tcp data message of the client of receiving, step 203s; Connect message if receive the dismounting TCP from client, then service end is responded the TCP connection from client of receiving and is removed message, removes at server end to be connected step 204s with the TCP of client.
Figure 3 shows that the present invention the data link layer message format that can support, comprising not with the data link layer frame format of VLAN mark and the data link layer frame format of band VLAN mark.
The above; it only is better embodiment of the present invention; should not be considered to be limitation of the scope of the invention; and the claim scope that the present invention advocated is not limited thereto; all personages who is familiar with this field skill; according to the disclosed technology contents of the present invention, can think easily and equivalence change, all should fall into protection scope of the present invention.
Claims (6)
1. simulate multi-user, multi-link data communications equipment method of testing for one kind, may further comprise the steps:
(1) test network initialization;
(2) utilize the ARP request message, be resolved to the MAC Address of data communications equipment;
(3) setting up client is connected with the TCP of service end;
(4) client sends the tcp data message to service end;
(5) service end is responded described tcp data message, carries out the test of data communications equipment;
(6) if the unit maximum number of connections that the TCP linking number that the current source MAC of customer end adopted and source IP address are set up is stipulated less than test macro, then keeping under the constant situation of source IP address, purpose IP address, change source tcp port number and purpose tcp port number in the TCP message, and repeating step (3) is to step (5);
(7) if user's network interface card number of client simulation less than system's designated value, then changes source MAC and source IP address, circulation execution in step (2) is to step (5); And
(8) test finishes, and connects according to the TCP that has set up, and client sends to service end and removes TCP connection message.
2. simulation as claimed in claim 1 multi-user, multi-link data communications equipment method of testing, wherein said test network initialization comprise configuration client running parameter and the working method of client, service end network interface card are arranged on promiscuous mode.
3. simulation multi-user as claimed in claim 2, multi-link data communications equipment method of testing, running parameter in the wherein said configuration client running parameter step comprises ethernet frame type, want single user's of the online machine quantity Count of emulation and emulation maximum TCP linking number, the initial MAC Address of network interface card, the start ip address of network interface card, the gateway ip address GWIP of this network interface card correspondence, the IP address of the service end of visiting, initiating terminal slogan and destination slogan that configuration TCP connects, TCP connects the tcp data message number that sends when setting up successfully, timeout interval.
4. simulation as claimed in claim 1 multi-user, multi-link data communications equipment method of testing, the wherein said ARP request message that utilizes, be resolved to the step of the MAC Address of data communications equipment, also comprise parameter by configuration, structure ARP request message, and the condition of catching corresponding arp response message is set, and send the ARP request message, be resolved to the MAC Address of data communications equipment.
5. simulation as claimed in claim 1 multi-user, multi-link data communications equipment method of testing, the wherein said TCP Connection Step of setting up client and service end also is included under the situation that the IP address of the source MAC of client simulation and source IP address, the data communications equipment MAC Address that is resolved to, service end remains unchanged, structure is set up TCP and is connected message, connect the three-way handshake mechanism of setting up according to TCP, by tested data communications equipment, send correct TCP message to described service end, connect to set up TCP.
6. simulation as claimed in claim 1 multi-user, multi-link data communications equipment method of testing, the unit maximum number of connections of wherein said test macro regulation is the quantity Count of online computer and the product of the single user's who simulated maximum TCP linking number MaxNum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN021399239A CN1514586B (en) | 2002-12-31 | 2002-12-31 | Testing method of data communication equipment of imitating multiuser, multi connection |
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| CN021399239A CN1514586B (en) | 2002-12-31 | 2002-12-31 | Testing method of data communication equipment of imitating multiuser, multi connection |
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| CN1514586A CN1514586A (en) | 2004-07-21 |
| CN1514586B true CN1514586B (en) | 2011-05-11 |
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| CN100361462C (en) * | 2005-03-22 | 2008-01-09 | 华为技术有限公司 | Method for testing transmission control protocol client |
| CN1327658C (en) * | 2005-08-09 | 2007-07-18 | 华为技术有限公司 | Detection method of network communication state |
| CN100382518C (en) * | 2005-10-14 | 2008-04-16 | 北京启明星辰信息技术有限公司 | Computer network data calogue ultimate measuring method and system |
| US8040835B2 (en) * | 2006-02-17 | 2011-10-18 | Cisco Technology, Inc. | Troubleshooting link and protocol in a wireless network |
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| CN114205274A (en) * | 2021-11-02 | 2022-03-18 | 北京百度网讯科技有限公司 | Network equipment testing method and device |
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| CN115022215B (en) * | 2022-05-25 | 2023-06-02 | 四川九州电子科技股份有限公司 | Method and system for testing MAC address of optical network unit |
| CN115174433A (en) * | 2022-07-07 | 2022-10-11 | 东软睿驰汽车技术(大连)有限公司 | Simulation method, simulation device and simulation system for multi-terminal access gateway |
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