CN100336349C - Implementation method and system for testing consistency of border gateway protocol of supporting IPv6 - Google Patents
Implementation method and system for testing consistency of border gateway protocol of supporting IPv6 Download PDFInfo
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Abstract
The present invention relates to a method and a system for realizing the consistency tests of the IPv6 supporting border gateway protocol. The method comprises steps that user parameters are configured at a testing terminal, and sockets connected the TCP of a tested device are created; through the sockets, a BGP4+ message is received, and the protocol message is sent to the tested device; through the sockets, a response message fed back by the tested device is used as input and is transferred to a new state according to a current state; correctness check and analysis are carried out on the received BGP4+ message, a tested message is constructed according to a tested item and testing requirements, and the tested message is sent to the tested device; the similarities and the differences between the response message fed back by the tested device and expected output are analyzed, the degree for the tested device to be consistent with the description of the expected output is decided, and the passing conclusion or the failure conclusion is given; the sockets connected to the TCP of the tested device are closed. The method and the system of the present invention have the advantages of completeness, no requirements for professional meters, low cost, simplicity and convenience.
Description
Technical field
The present invention relates to a kind of in the internet implementation method and the system of Border Gateway Protocol (Border gatewayprotocol) (hereinafter to be referred as BGP) uniformity test, particularly relate to a kind of in Internet protocol sixth version (hereinafter to be referred as IPv6) network the BGP4+ testing protocol consistency implementation method and the system of route switching between support region.
Background technology
China has started CNGI (hereinafter to be referred as CNGI) project, builds the interference networks of future generation based on IPv6 energetically.Protocol interconnection in the networking process between the devices from different manufacturers is the control signalling route agreement of a problem demanding prompt solution, particularly network, and is especially important as the intercommunication between BGP4+, OSPFv3, the ISISv6.BGP4+ is based on the Extended Protocol of BGP4, and it is the inter-domain routing protocol that is used to exchange the IPv6 routing iinformation, has inherited the basic principle of BGP4 agreement.BGP4 is the dynamic routing protocol that is used to learn routing iinformation between the autonomous system, its major function is reached at the information of switching network between the system of each realization BGP4 agreement, these information comprise the tabulation of the autonomous system that a route is passed through, and they are enough to set up the figure of an expression connection status.BGP4 is an agreement that combines distance vector algorithms and link-state algorithm, and it operates on the reliable host-host protocol, adopts transmission control protocol (hereinafter to be referred as TCP) as its underlying protocol.Request for Comment (Request For Comments) (hereinafter to be referred as RFC) has comprised the nearly all important written historical materials about Internet.The appointment of overwhelming majority network standards all is that the form with RFC begins, and through a large amount of demonstration and modification process, is organized specified by main standardsization.Four kinds of BGP type of messages have been stipulated among the RFC1771: open message, update message, notification message and keep-alive message.Open message is intended to open between peering router a BGP communication session; Update message is used for issuing routing iinformation between bgp peer, make the router of operation BGP can set up the uniform view of network topology; Notification message is the notification message that sends when wrong detecting, and is used to close the bgp session of an activity, and announces the reason that other router is closed this session; Keep-alive message is used to notify this equipment of reciprocity bgp router to remain active state; Defined six states of BGP in addition, described the BGP establishment of connection and keep by finite state machine.
At present the BGP4+ uniformity test mainly is that test instrumentation by external producer carries out, as the Ax4000 of Spirent Communications (Spirent Communications) company.This uniformity test instrument need operate in 100,000,000 or the gigabit interface board on, its realization mechanism is: at first set up syntople according to protocol requirement between test interface and equipment under test, construct corresponding test packet according to test request then, send to tested equipment, compare by response message and the expected result that will receive again, thus the completeness that the determining apparatus agreement realizes.But the test case that present producer provides mainly is at the newly-increased extended field of agreement, and is incomplete to the test event realization of RFC document specifies, and the hardware platform support that this protocol test external member need be special, costs an arm and a leg, and is not easy to promote the use of.
Summary of the invention
For overcoming the incomplete problem that realizes BGP4+ testing protocol consistency project in the prior art, the present invention proposes the implementation method of Border Gateway Protocol (BGP4+) uniformity test of a kind of Ipv6 of support, the content measurement of realizing expansion BGP4+ testing protocol consistency is contained face, verify the consistency between equipment under test BGP realization and the respective standard, the intercommunication between realizing for identical standard is different provides the detection foundation more completely.
Another object of the present invention is to overcome in the prior art equipment requirements height, the deficiency that is not easy to promote the use of, and the realization system of Border Gateway Protocol (BGP4+) uniformity test of a kind of simple and easy to do support Ipv6 is provided.
The basic principle of implementation method of the present invention and system is:
1) the present invention meets RFC1771 fully, RFC1997, RFC2796, RFC2858, relevant international regulation such as RFC3065.In specific implementation, construct and resolve the message field (MFLD) territory, and define corresponding macro operation and visit different field domain, thereby reduce the processing mistake in message field (MFLD) territory, reach consistent with the international regulation of RFC by defmacro.
2) the present invention is based on the windows operating system platform of supporting the IPv6 protocol stack, adopted object-oriented method (to encapsulate communication socket class and peer-to-peer class, for the user provides patterned configuration interface) and multithreading (main thread is responsible for initialization and man-machine interaction, worker thread is finished the realization of BGP finite state machine and each test case), message mechanism is adopted in communication between each thread, event notification or synchronously, the mutex amount realizes.This external member may operate on the common installation Windows system PC.
3) the present invention can bind a plurality of IPv6 address on single network interface card, connects with a plurality of interfaces of tested equipment by hub and sets up bgp session, and software is created a thread for each bgp session and safeguarded its session status.
4) the present invention realizes on the TCP socket communication layer based on IPv6, encapsulate operations such as socket, bind, connect, recv, send, select, in software is realized, defined two important classes: socket communication class (hereinafter to be referred as Cwsocket) and bgp peer class (hereinafter to be referred as CBgpPeer).Wherein the CWsocket class is responsible for realizing that the TCP of IPv6 connects foundation and safeguards and send protocol massages by socket to peer-to-peer, operations such as connecting foundation, release, read data, write data is provided, the CBgpPeer class is responsible for the foundation and the maintenance of bgp session, the current state of record BGP entity provides the operation that receives and send protocol massages.
5) processing threads of I/O queue of the present invention, adopt the mechanism of shared buffer memory, the protocol massages of all receptions and transmission all comes the unified processing of input and output queue respectively, all resolves to the form that can read for the binary protocol message that receives and send and outputs to user interface.
The implementation method of Border Gateway Protocol (BGP4+) uniformity test of support IPv6 of the present invention is included in test lead and carries out the following step:
The socket that step 1. configure user parameter and establishment are connected with equipment under test TCP;
Step 2. receives boundary gateway protocol message and sends this boundary gateway protocol message to equipment under test by socket;
Step 3. by socket with the response message of equipment under test feedback as input, and according at that time state transition to new state;
The boundary gateway protocol message of receiving in the step 4. pair step 2 carries out correctness inspection and analysis, according to test event, constructs test packet according to test request, and sends this test packet to equipment under test;
Step 5. is analyzed the response message of equipment under test feedback, i.e. the actual output of equipment under test, with the similarities and differences of expection output, judge equipment under test to what extent with expection output describe consistent, and provide test by or test the conclusion of not passing through;
Implementation method of the present invention also is included in a plurality of IPv6 of binding address on the single network interface card, connects with a plurality of interfaces of tested equipment by hub (Hub) and sets up the Border Gateway Protocol session.
Implementation method of the present invention also comprises the reception and the transmission of boundary gateway protocol message, test packet and response message, adopt the mechanism of shared buffer memory, the message of all receptions and transmission all comes the unified processing of input and output queue respectively, becomes the form that can read to output to user interface for the binary system packet parsing that receives and send.
Implementation method of the present invention provides patterned configuration interface for the user, and wherein above-mentioned steps 1 further comprises:
Step 101. encapsulation socket communication class realizes that the TCP of IPv6 connects foundation and safeguards and send protocol massages by TCP socket communication course equipment under test, and operations such as connection foundation, release, read data, write data are provided;
Step 102. encapsulation Border Gateway Protocol peer-to-peer class with the foundation and the maintenance of equipment under test Border Gateway Protocol session, the state that record delimitation gateway protocol entity is current, provides to receive and send protocol massages.
Above-mentioned steps 1 also comprises:
Step 103. is set up main thread, is used for initialization and man-machine interaction;
Step 104. is set up worker thread, finishes the realization of Border Gateway Protocol finite state machine and each test event.
Message mechanism is adopted in communication between above-mentioned each thread, event notification or synchronously, the mutex amount realizes.
The realization system of Border Gateway Protocol (BGP4+) uniformity test of support IPv6 of the present invention comprises equipment under test and test lead, and wherein test lead comprises:
Based on supporting the IPv6 protocol stack and the computer of windows operating system being installed; And
Operate in the protos test suite PROTOS in the aforementioned calculation machine, this protos test suite PROTOS comprises at least:
---user's configuration interface module:, finish the customer parameter configuration by friendly user interface is provided;
---TCP socket communication layer module: in order to create and to close and the socket that is connected by side apparatus TCP;
---the reception and the sending module of protocol massages: in order to receive and to send boundary gateway protocol message from TCP socket communication layer;
---Border Gateway Protocol finite state machine module: the response message that will feed back from the equipment under test that TCP socket communication layer receives is as input, arrive new state according to state transition at that time, and the invocation protocol message processing module (MPM) generates the corresponding protocol message;
---protocol massages processing module: the boundary gateway protocol message of receiving is carried out correctness inspection and analysis; According to concrete test event, according to test request structure test packet, and the reception of invocation protocol message and sending module send test packet to equipment under test;
---results analyses module: analyze the similarities and differences of actual output with the expection output of equipment under test, judge equipment under test to what extent with expection output describe consistent, provide by or the conclusion do not passed through.
Said system also is included in the hub that test lead is provided with a plurality of IPv6 of promising single network card binding address, connects with a plurality of interfaces of tested equipment by hub and sets up the Border Gateway Protocol session.
The invention has the beneficial effects as follows, can be by operation BGP4+ testing protocol consistency external member of the present invention on ordinary PC, the implementation method and the system of test meet RFC1771 fully, RFC1997, RFC2796, RFC2858, relevant international regulation such as RFC3065, the completeness of its test has comprised functions such as message format consistency detection, Update Message Processing, route processing, mistake processing, route reflection and group attribute processing.Owing to do not need the instrument of specialty, and can bind a plurality of IPv6 address on single network interface card and set up a plurality of bgp sessions, the test environment that utilizes this test implementation method and system to set up is with low cost, simple and convenient.
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the inventive method testing procedure schematic diagram;
Fig. 2 is for carrying out the test topology of two test ports with the inventive method;
Fig. 3 is for carrying out the test topology of many test ports with the inventive method;
Fig. 4 is the concrete testing procedure flow chart of the inventive method.
Embodiment
Below in conjunction with accompanying drawing a preferred embodiment of the present invention is described in further detail:
As shown in Figure 1, the implementation method of Border Gateway Protocol (BGP4+) uniformity test of support IPv6 of the present invention is included in test lead and carries out the following step:
The socket that step 1. is connected with equipment under test TCP in " user's configuration interface " and " TCP socket communication layer " configure user parameter and establishment.The configure user parameter: by friendly user interface is provided, finish the customer parameter configuration, as the connection mode of Socket, test interface pattern and test interface parameter, test item selective listing etc.Create the socket that is connected with equipment under test TCP: encapsulation socket communication class, the TCP that realizes IPv6 connects foundation and safeguards and send protocol massages by TCP socket communication course equipment under test, and operations such as connection foundation, release, read data, write data are provided; Encapsulation Border Gateway Protocol peer-to-peer class with the foundation and the maintenance of equipment under test Border Gateway Protocol session, the state that record delimitation gateway protocol entity is current, provides to receive and send protocol massages; Step 1 also comprises and sets up main thread in addition, is used for initialization and man-machine interaction, sets up worker thread, as processing threads of I/O queue etc., finishes the realization of Border Gateway Protocol finite state machine and each test event.Message mechanism is adopted in communication between each thread, event notification or synchronously, the mutex amount realizes.
Step 2. receives boundary gateway protocol message and sends this boundary gateway protocol message to equipment under test by socket, i.e. " protocol massages reception/transmission " step in the corresponding diagram 1;
Step 3. by socket with the response message of equipment under test feedback as input, and according at that time state transition to new state, i.e. " BGP finite state machine " step in the corresponding diagram 1;
The boundary gateway protocol message of receiving in the step 4. pair step 2 carries out correctness inspection and analysis, according to test event, construct test packet according to test request, and send this test packet, be i.e. " protocol massages processing " step in the corresponding diagram 1 to equipment under test;
Step 5. is analyzed the response message of equipment under test feedback, be the actual output of equipment under test, with the similarities and differences of expection output, the judgement equipment under test is to what extent described consistent with expection output, and provide by or the conclusion do not passed through, i.e. " interpretation of result " step in the corresponding diagram 1;
As Fig. 2, shown in Figure 3, the present invention can also set up bgp session by hub connection and a plurality of interfaces of tested equipment in a plurality of IPv6 of binding address on single network interface card, also creates the step that a thread is safeguarded its session status for each bgp session.Shown in Figure 2, for two Ipv6 addresses of binding on single network interface card, connect the test topology of setting up bgp session with two test ports of equipment under test by hub.Shown in Figure 3, for three Ipv6 addresses of binding on single network interface card, connect the test topology of setting up bgp session with three test ports of equipment under test by hub.
As shown in Figure 2, make up the test topology of dual-port, mainly test different syntoples, between internal bgp peer-to-peer (internal BGP peer) (hereinafter to be referred as IBGP), that is: IBGP-IBGP; Between IBGP and the external bgp peer (external BGP peer) (hereinafter to be referred as EBGP), that is: IBGP-EBGP; Under the EBGP-EBGP, the correctness of all kinds of BGP messages of device processes.Among Fig. 2, if test I BGP-IBGP syntople, autonomous system (Autonomous System) (hereinafter to be referred as AS)-a, AS-b and AS-c belong to an autonomous system so; If test I BGP-EBGP syntople, AS-a and AS-b belong to an autonomous system so; AS-a and AS-c do not belong to same autonomous system; If test EBGP-EBGP syntople, AS-a and AS-b do not belong to same autonomous system so; AS-a and AS-c do not belong to same autonomous system yet.Can this test topology be mainly used in the following function of test: set up bgp session with equipment under test; Can equipment under test correctly handle unusual BGP message, as incorrect Marker field, and type of message, message length, version information, AS number, router identifier is consulted attribute and authentication field etc.; Can equipment under test correctly handle the Origin in the Update message, AS_PATH, NEXT_HOP, attributes such as LOCAL_PREF; Equipment under test can be correct calculating and transmit routing iinformation.
As shown in Figure 3, make up the test topology of multiport; Be mainly used in testing equipment and carry out functional characteristics such as route aggregation, route reflection and group attribute processing.Can this topology is mainly used in equipment under test correctly handle route aggregation, route reflection and Community group attribute.Can be according to different testing requirement configuration autonomous system number, configuration client and non-customer relationship, alliance concerns.
Fig. 4 is the concrete testing procedure flow chart of the inventive method.Its concrete operations step is as follows:
Step 1: in based on the windows operating system of supporting the IPv6 protocol stack, installation testing external member, execution in step 2;
Step 2: customer parameter configuration and initialization, execution in step 3;
Step 3: create a TCP socket at TCP socket communication layer, if create successfully, execution in step 4 or 7 then, otherwise finish this test;
Step 4:BGP conversation modes is passive listen mode, execution in step 5;
Step 5: whether receiving the Open message of equipment under test, is execution in step 8 then, otherwise execution in step 6;
Step 6: judge whether timer is overtime,, finish this test if timer expired is closed the TCP socket; If timer is not overtime, then execution in step 5;
Step 7:BGP conversation modes is the active creation mode, execution in step 8;
Step 8: finite state machine, the protocol massages that will receive from TCP socket communication layer be as input, according at that time state transition to new state, execution in step 9;
Step 9: peer-to-peer is set up, and promptly sets up syntople with equipment under test, if success, execution in step 10, otherwise execution in step 16;
Step 10: according to test request structure test packet, execution in step 11;
Step 11: send this test packet to equipment under test (peer-to-peer), execution in step 12;
Step 12: whether receiving the response message of equipment under test, is execution in step 13 then, otherwise execution in step 18;
Step 13: resolve the response message that receives from equipment under test, execution in step 14
Step 14: compare with expected result, if conform to, execution in step 15; If do not conform to, execution in step 17;
Step 15: provide and be judged to be correctly execution in step 16;
Step 16: close the TCP socket, finish this test;
Step 17: provide be judged to be incorrect, execution in step 16;
Step 18: whether be expected results, if expected results, execution in step 19; Otherwise execution in step 17;
Step 19: provide and be judged to be correctly execution in step 16
Realization of the present invention system comprises equipment under test and test lead, and based on supporting the IPv6 protocol stack and the computer of windows operating system being installed; With the protos test suite PROTOS that operates in the aforementioned calculation machine, this protos test suite PROTOS comprises at least:
---user's configuration interface module:, finish the customer parameter configuration by friendly user interface is provided;
---TCP socket communication layer module: in order to create and to close and the socket that is connected by side apparatus TCP;
---the reception and the sending module of protocol massages: in order to receive boundary gateway protocol message by socket and to send this boundary gateway protocol message to equipment under test;---Border Gateway Protocol finite state machine module: by socket with the response message of equipment under test feedback as input, and according at that time state transition to new state; And the invocation protocol message processing module (MPM) generates the corresponding protocol message;
---protocol massages processing module: the boundary gateway protocol message of receiving is carried out consistency inspection and analysis; According to concrete test event, according to test request structure test packet, and the reception of invocation protocol message and sending module send protocol massages to equipment under test;
---results analyses module: analyze the response message of equipment under test feedback, i.e. the actual output of equipment under test, with the similarities and differences of expection output, judge equipment under test to what extent with expection output describe consistent, and provide by or the conclusion do not passed through;
System of the present invention also is included in a plurality of IPv6 of binding address on the single network interface card of test lead, connects with a plurality of interfaces of tested equipment by hub and sets up the Border Gateway Protocol session.
According to the implementation method and the system of the Border Gateway Protocol uniformity test of support of the present invention Ipv6, make up corresponding test topology according to the requirement of test event, above-mentioned protos test suite PROTOS can mainly be realized following function:
A. can equipment under test initiatively or the passive bgp session of setting up;
B. can equipment under test correctly handle unusual BGP message, as incorrect Marker field, and type of message, message length, version information, AS number, router identifier is consulted attribute and authentication field etc.;
C. can equipment under test correctly be handled under IBGP, EBGP syntople, the Origin of Update message, AS_PATH, NEXT_HOP, attributes such as LOCAL_PREF;
D. can equipment under test correctly handle the route aggregation attribute;
E. can equipment under test correctly handle the route reflection attribute;
F. can equipment under test reach and correctly handle the Community group attribute.
More than describe implementation method of the present invention and system in detail, but this preferred embodiment of just enumerating for the ease of understanding should not be considered to be limitation of the scope of the invention.Equally; any person of ordinary skill in the field all can be according to the description of technical scheme of the present invention and preferred embodiment thereof; make various possible being equal to and change or replacement, but all these changes or replacement all should belong to the protection range of claim of the present invention.
Claims (8)
1. implementation method of supporting the Border Gateway Protocol uniformity test of Ipv6 is characterized in that carrying out the following step at test lead:
The socket that step 1. configure user parameter and establishment are connected with equipment under test TCP;
Step 2. receives boundary gateway protocol message and sends this boundary gateway protocol message to equipment under test by socket;
Step 3. by socket with the response message of equipment under test feedback as input, and according at that time state transition to new state;
The boundary gateway protocol message of receiving in the step 4. pair step 2 carries out correctness inspection and analysis, according to test event, constructs test packet according to test request, and sends this test packet to equipment under test;
Step 5. is analyzed the response message of equipment under test feedback, i.e. the actual output of equipment under test, with the similarities and differences of expection output, judge equipment under test to what extent with expection output describe consistent, and provide by or the conclusion do not passed through;
Step 6. is closed the socket that is connected with equipment under test TCP.
2. method according to claim 1 is characterized in that also being included in the step of binding a plurality of IPv6 address on the single network interface card, connects with a plurality of interfaces of equipment under test by hub and sets up the Border Gateway Protocol session.
3. method according to claim 2, it is characterized in that the reception and the transmission of above-mentioned boundary gateway protocol message, test packet and response message, adopt the mechanism of shared buffer memory, the message of all receptions and transmission all comes the unified processing of input and output queue respectively, becomes the form that can read to output to user interface for the binary system packet parsing that receives and send.
4. method according to claim 3 is characterized in that step 1 further comprises for the user provides patterned configuration interface:
Step 101 encapsulation socket communication class realizes that the TCP of IPv6 connects foundation and safeguards and send protocol massages by TCP socket communication course equipment under test, and connection foundation, release, read data, data writing operation are provided;
Step 102 encapsulation Border Gateway Protocol peer-to-peer class with the foundation and the maintenance of equipment under test Border Gateway Protocol session, the state that record delimitation gateway protocol entity is current, provides to receive and send protocol massages.
5. method according to claim 4 is characterized in that step 1 also comprises:
Step 103 is set up main thread, is used for initialization and man-machine interaction;
Step 104 is set up worker thread, finishes the realization of Border Gateway Protocol finite state machine and each test event.
6. method according to claim 5 is characterized in that message mechanism is adopted in the communication between above-mentioned each thread, event notification or synchronously, the mutex amount realizes.
7. a realization system that supports the Border Gateway Protocol uniformity test of IPv6 comprises equipment under test and test lead, it is characterized in that test lead comprises:
Based on supporting the IPv6 protocol stack and the computer of windows operating system being installed; And
Operate in the protos test suite PROTOS in the aforementioned calculation machine, this protos test suite PROTOS comprises at least:
---user's configuration interface module:, finish the customer parameter configuration by friendly user interface is provided;
---TCP socket communication layer module: in order to create and to close and the socket that is connected by side apparatus TCP;
---the reception and the sending module of protocol massages: in order to receive and to send boundary gateway protocol message from TCP socket communication layer;
---Border Gateway Protocol finite state machine module: the response message that will feed back from the equipment under test that TCP socket communication layer receives is as input, arrive new state according to state transition at that time, and the invocation protocol message processing module (MPM) generates the corresponding protocol message;
---protocol massages processing module: the boundary gateway protocol message of receiving is carried out correctness inspection and analysis; According to concrete test event, according to test request structure test packet, and the reception of invocation protocol message and sending module send test packet to equipment under test;
---results analyses module: analyze the similarities and differences of actual output with the expection output of equipment under test, judge equipment under test to what extent with expection output describe consistent, provide by or the conclusion do not passed through.
8. system according to claim 7 is characterized in that said system also is included in the hub that test lead is provided with a plurality of IPv6 of promising single network card binding address, connects with a plurality of interfaces of equipment under test by this hub and sets up the Border Gateway Protocol session.
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| CN101867504A (en) * | 2010-06-17 | 2010-10-20 | 中控科技集团有限公司 | Method and device for testing consistency of automation fieldbus |
| CN103490953A (en) * | 2013-09-12 | 2014-01-01 | 清华大学 | System and method for testing RTP stack consistency implementation |
| CN103746879A (en) * | 2013-12-28 | 2014-04-23 | 国家电网公司 | Testing system and method for consistency of IPv6 (Internet Protocol Version 6) protocol |
| CN108322356A (en) * | 2017-01-18 | 2018-07-24 | 重庆邮电大学 | A kind of industrial network gateway compatibility test method based on MQTT |
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