CN100377537C - Message forming method - Google Patents
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- CN100377537C CN100377537C CNB2005100364032A CN200510036403A CN100377537C CN 100377537 C CN100377537 C CN 100377537C CN B2005100364032 A CNB2005100364032 A CN B2005100364032A CN 200510036403 A CN200510036403 A CN 200510036403A CN 100377537 C CN100377537 C CN 100377537C
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Abstract
The present invention relates to a message generation method for generating various data communication protocol messages, which comprises the following steps that various message domains of each data communication protocol concrete message format are abstractly classified and divided into a bit message domain, a byte message domain, a character string message domain, a length message domain and a check sum message domain; each message domain of the data communication protocol concrete message formats to be generated is classified to the bit message domain, the byte message domain, the character string message domain, the length message domain and the check sum message domain; an integral byte stream for processing and outputting the data communication protocol message is sorted according to the input parameter value of the bit message domain, or the byte message domain, or the character string message domain, or the length message domain or the check sum message domain which each message domain of the data communication protocol concrete message format to be generated belongs to. The present invention can generate the messages of any data communication protocols.
Description
Technical field
The present invention relates to data communication technology field, in particular, the present invention relates to a kind of message forming method.
Background technology
Along with the Internet is popularized global, the function of data communications equipment, stability and robustness are more and more important, and will reach these standards, the data communication equipment is carried out strict test be absolutely necessary.Usually, communication between the data communications equipment is by the mutual realization of variety of protocol message, the major function of data communications equipment will correctly be handled the variety of protocol message exactly, and the test of data communication equipment is generally also tested and realized by send the variety of protocol message to equipment under test.For example, how therefore the testing protocol consistency of data communication, abnormality test, attack test etc., constitute and generate the key that the variety of protocol message has become the data communication field measuring technology.
Data communication field generates protocol massages and generally adopts dual mode in the prior art, and first kind of mode is to utilize the protocol massages conformation function of existing testing tool, specifically generates message and mainly comprises following step:
At first, catch the protocol massages of online transmission; Then, some byte of the message of catching is made amendment to constitute required protocol massages; Cause if revise some byte other message territory variation (as verification and), then recomputate the value that needs the message territory that changes; With the protocol massages of described amended protocol massages output as generation.
This kind mode realizes simpler, but has following shortcoming:
At first, the structure of protocol massages often depends on the message of online transmission, and is unpredictable;
Secondly, to the comparison difficulty of making amendment of the byte in the byte stream of catching message.Owing to will in a lot of byte stream, find the byte that to revise; And, revise the variation that certain byte can cause other message territory sometimes, as verification and territory, will recomputate the message territory that will change like this, relatively waste time and energy;
Once more, some emerging data communication protocols are often caught the message less than these agreements on the net, so just can't construct the message of these agreements, in addition, also are not easy to construct some special messages, because special message is difficult on the net catch.
The second way mainly is to utilize TCL language technology, encapsulates the generation protocol massages with the TCL explosion command, the often corresponding TCL explosion command of a kind of message of certain agreement.For certain concrete protocol massages, this method requires the concrete parameter of this protocol massages of input.As construct an ARP message, then need the description of similar following mode;
MakeArpPacket-seth?mac-sip?ip_addr-deth?mac-dip?ip_addr-oper?oper
Annotate :-seth mac represents source MAC;-sip ip_addr represents IPv4 address, source;-deth mac represents target MAC (Media Access Control) address;-dip ip_addr represents purpose IPv4 address;-oper oper represents action type, 1 expression ARP request, 2 expression arp replys.
There is following shortcoming in this kind method:
At first, a kind of message in a kind of agreement often needs corresponding TCL explosion command, as will construct the multiple message of a plurality of agreements the time, then needs the TCL explosion command huge amount of developing;
Secondly, develop corresponding TCL explosion command more complicated, need with C language compilation code, this requires than higher the tester;
Once more,, do not have ready-made TCL explosion command to construct the message of these agreements, can only continue to drop into the TCL explosion command that manpower is developed these protocol massages of structure for emerging data communication protocol.
Once more, also be not easy to construct some special messages,, be difficult to realize with the TCL order in advance because special message often has uncertainty.
Summary of the invention
The technical problem that the present invention solves provides a kind of general message forming method, to realize constructing data communication protocol message arbitrarily.
For addressing the above problem, message forming method of the present invention is used to generate various data communication protocol messages, and this method comprises the steps:
A, be bit message territory, byte message territory, character string message territory, length message territory and check and message territory with the abstract classifying and dividing in various messages territory of the concrete message format of each data communication protocol;
B, each message territory of the concrete message format of data communication protocol to be generated is referred to described bit message territory, byte message territory, character string message territory, length message territory and check and message territory;
C, according to each message territory of the concrete message format of data communication protocol to be generated input parameter value in described bit message territory, byte message territory, character string message territory, length message territory or the check and the message territory of its ownership, the complete bytes stream of this data communication protocol message of arrangement output.
Wherein, step b comprises:
B1, successively the message territory of sorting out is numbered according to the message territory in the concrete form of data communication protocol message order;
B2, determine to be referred to each message territory shared length and value in the concrete message format of data communication protocol to be generated in described bit message territory, byte message territory, the character string message territory, and the shared length in described length message territory, the long measure of representative, the start message territory sequence number and the end message territory sequence number of representative length range, start message territory sequence number and end message territory sequence number and the check of being adopted and the algorithm of the shared length of described check and message territory, institute's test range;
B3, according to the number order in message territory, import all message field parameter values of this message successively, if length message territory or check and message territory, then the value in incoming message territory is changed to 0;
Step c comprises:
C1, according to the parameter value in incoming message territory, generate the bit stream in each message territory successively, and this bit stream appended to the afterbody that this message has generated bit stream;
C2, the full bit stream of this message is converted to byte stream;
C3, according to the value that the start message territory sequence number and the end message territory sequence number of described length message territory representative length range are determined described length message territory, then the value that obtains is inserted the relevant position of this length message territory at above-mentioned message byte stream;
C4, according to from last check and message territory to the order in the most previous check and message territory, successively according to the start message territory sequence number and the end message territory sequence number of described check and message territory institute test range, and the check of being adopted and algorithm determine the value in described check and message territory, then the value that obtains inserted this check and the message territory relevant position at above-mentioned message byte stream;
C5, export the complete bytes stream of this message.
Compared with prior art, the present invention has following beneficial effect:
The present invention is bit message territory, byte message territory, character string message territory, length message territory and check and message territory by the abstract classifying and dividing in various messages territory with the concrete message format of each data communication protocol; Each message territory with the concrete message format of data communication protocol to be generated is referred to described bit message territory, byte message territory, character string message territory, length message territory and check and message territory then; According to each message territory of the concrete message format of data communication protocol to be generated parameter value in described bit message territory, byte message territory, character string message territory, length message territory or the check and the message territory of its ownership, the complete bytes stream of this data communication protocol message of arrangement output.Can realize arbitrary data communication protocol message based on above-mentioned message forming method, the data communications test personnel do not need to spend a large amount of time again and remove to develop other message structure instrument or corresponding TCL explosion command, can use manpower and material resources sparingly greatly, accelerate testing progress data communication existing protocol and newly-increased agreement.
Description of drawings
Fig. 1 is about the description of IPv4 stem form among the RFC791;
Fig. 2 is the specific implementation schematic diagram of message forming method of the present invention.
Embodiment
An agreement of data communication is corresponding with one or more RFC documents usually, and the format description of these all messages of agreement is arranged in described RFC document.It is unit that message format is described with the message territory, and the content in message territory can be a plurality of bytes, a plurality of bit or even a bit, and the data communication message finally transmits on network line is 0 or 1 bit stream.For example, with reference to figure 1, this figure be among the RFC791 about the description of IPv4 stem form, a message territory represented in word or phrase among the figure.The message of this data communication protocol is made up of 14 message territories.
The present invention is the fact that is made of a plurality of messages territory according to the data communication protocol message, and abstract classification and definition are carried out in various messages territory.For the message consistent with agreement, the tester can be according to the message format in the corresponding RF C document, a message is divided into a plurality of messages territory, provide the input parameter in each message territory, it is belonged in the abstract message territory of its classification, just can export desired message according to the input parameter in each message territory; Similarly, for exception message,, it is belonged in the abstract message territory of its classification, just can export desired exception message according to the input parameter in each message territory as long as the tester provides the input parameter in all message territories of forming this message.
The present invention has carried out abstract classification to the message territory of data communication protocol message, has defined following five kinds of message field types, and the message territory of data communication protocol message can be contained by these five kinds of message field types:
● bit message territory: this kind message comprises one or more bits in the territory, and the parameter that belongs to the message territory input of this type has:
The ■ bit number;
The value in this message territory of ■;
● byte message territory: this kind message comprises one or more bytes in the territory, and the parameter that belongs to the message territory input of this type has:
The ■ byte number;
The value in this message territory of ■;
● character string message territory: the content in this kind message territory is a character string, and the parameter that belongs to the message territory input of this type has:
Character string of ■ is as " hello world ";
● length message territory: the filling content in this kind message territory is the length of this message section content, and the parameter that belongs to the message territory input of this type has:
The unit of the length that this message territory of ■ is represented: with 1 byte is unit (as the quiet lotus length message territory in the IPv6 stem); With 4 bytes is unit (as the header length message territory in the IPv4 stem); With 8 bytes is unit, and represented length (byte number)=(value in this message territory+1) * 8 in this message territory, (as the length message territory in the route extension header in the IPv6 message);
The width that this message territory of ■ itself is occupied accounts for 4 bit widths as the header length message territory in the IPv4 stem, and the quiet lotus length message territory in the IPv6 stem accounts for 2 byte wides;
The start message territory sequence number of the length that this message territory of ■ is represented;
The end message territory sequence number of the length that this message territory of ■ is represented;
● check and message territory: the filling content in this kind message territory be this message section content check and value, belonging to the parameter of the message territory of this type importing has:
The shared byte number in this message territory of ■ itself accounts for 2 bytes as check of the stem in the IPv4 stem and message territory;
■ should check and the algorithm title that adopted, as the radix-minus-one complement summation check and, the ISO check and, the CRC check and etc.;
■ should check and the start message territory sequence number of the message content that will calculate;
■ should check and the end message territory sequence number of the message content that will calculate;
The message that the combination in above several types message territory can be constructed almost can be contained all protocol massages of data communication field, also can construct other exception message arbitrarily.
With reference to figure 2, this figure is the specific implementation flow chart of message forming method that the present invention is based on the message field type of above-mentioned definition, mainly comprises the steps:
Illustrate below.First example is structure Ping Request message, and the particular content of this message is as shown in table 1, and the value in message territory is 16 systems:
| The Ethernet destination address accounts for 6 bytes, is worth to be e0000af0c661 | Ethernet source address accounts for 6 bytes, is worth to be 000c76dd94e6 |
| Frame type accounts for 2 bytes, and value is 0800 | IP version accounts for 4 bits, and value is 4 |
| The IP header length accounts for 4 bits, and value needs to calculate | COS accounts for 1 byte, and value is 00 |
| Total length accounts for 2 bytes, is worth to be needs calculating | Sign accounts for 2 bytes, and value is 1739 |
| Sign accounts for 3 bits, and value is 0 | The sheet skew accounts for 13 bits, and value is 00 |
| Life span accounts for 1 byte, and value is 80 | Agreement accounts for 1 byte, and value is 01 |
| IP stem check and, account for 2 bytes, value needs calculating | IPv4 address, source accounts for 4 bytes, is worth to be 0a6eb50c |
| Purpose IPv4 address accounts for 4 bytes, is worth to be 0a6eb55e | The ICMP type accounts for 1 byte, and value is 08 |
| Code accounts for 1 byte, and value is 00 | ICMP check and, account for 2 bytes, value needs calculating |
| Identifier accounts for 2 bytes, and value is 0400 | Sequence number accounts for 2 bytes, and value is 0900 |
| Data account for 32 bytes, are worth to be 61,626,364,656,667,686,96a,6b6,c6d,6e6,f70,717,273,747,576,776,162,636,465 6,667 6869 | |
Import following data in order:
1. byte message territory accounts for 6 bytes, is worth to be e0000af0c661;
2. byte message territory accounts for 6 bytes, is worth to be 000c76dd94e6;
3. byte message territory accounts for 2 bytes, and value is 0800;
4. bit message territory accounts for 4 bits, and value is 4;
5. length message territory is a unit with 4 bytes, accounts for 4 bits, and start message territory sequence number is 4, and end message territory sequence number is 15;
6. byte message territory accounts for 1 byte, and value is 00;
7. length message territory is a unit with 1 byte, accounts for 2 bytes, and start message territory sequence number is 4, and end message territory sequence number is 21;
8. byte message territory accounts for 2 bytes, and value is 1739;
9. bit message territory accounts for 3 bits, and value is 0;
10. bit message territory accounts for 13 bits, and value is 00;
11. byte message territory accounts for 1 byte, value is 80;
12. byte message territory accounts for 1 byte byte, value is 01;
13. check and message territory account for 2 bytes, adopt radix-minus-one complement summation algorithm, start message territory sequence number is 4, and end message territory sequence number is 15;
14. byte message territory accounts for 4 bytes, is worth to be 0a6eb50c;
15. byte message territory accounts for 4 bytes, is worth to be 0a6eb55e;
16. byte message territory accounts for 1 byte, value is 08;
17. byte message territory accounts for 1 byte, value is 00;
18. check and message territory account for 2 bytes, adopt radix-minus-one complement summation algorithm, start message territory sequence number is 16, and end message territory sequence number is 21;
19. byte message territory accounts for 2 bytes, value is 0400;
20. byte message territory accounts for 2 bytes, value is 0900;
21. byte message territory accounts for 32 bytes, is worth to be
6162636465666768696a6b6c6d6e6f70717273
74757677616263646566676869
According to realization flow of the present invention shown in Figure 2, the byte stream that exportable this message is complete is:
e0000af0c661000c76dd94e608004500003c173900008001a4410a6eb50c0a6eb55e
0800405c040009006162636465666768696a6b6c6d6e6f707172737475767761626
3646566676869。
Second example is structure IGMPv2 Membership Query message, and the particular content of this message is as shown in table 2, and the value in message territory is 16 systems:
| The Ethernet destination address accounts for 6 bytes, is worth to be 01005e000009 | Ethernet source address accounts for 6 bytes, is worth to be 00c0dfb279af |
| Frame type accounts for 2 bytes, and value is 0800 | IP version accounts for 4 bits, and value is 4 |
| The IP header length accounts for 4 bits, and value needs to calculate | COS accounts for 1 byte, and value is 00 |
| Total length accounts for 2 bytes, is worth to be needs calculating | Sign accounts for 2 bytes, is worth to be 7c19 |
| Sign accounts for 3 bits, and value is 0 | The sheet skew accounts for 13 bits, and value is 00 |
| Life span accounts for 1 byte, and value is 01 | Agreement accounts for 1 byte, and value is 02 |
| IP stem check and, account for 2 bytes, value needs calculating | IPv4 address, source accounts for 4 bytes, is worth to be 0a6e8a41 |
| Purpose IPv4 address accounts for 4 bytes, is worth to be e0000009 | The IP option accounts for 4 bytes, and value is 94040000 |
| The IGMP type accounts for 1 byte, and value is 16 | Between maximal phase is seasonable, account for 1 byte, value is 00 |
| IGMP check and, account for 2 bytes, value needs calculating | Multicast group address accounts for 4 bytes, is worth to be e0000009 |
| Padding data accounts for 14 bytes, and value is 0000000000000000000000000000 | |
Import following data in order:
1. byte message territory accounts for 6 bytes, is worth to be 01005e000009;
2. byte message territory accounts for 6 bytes, is worth to be 00c0dfb279af;
3. byte message territory accounts for 2 bytes, and value is 0800;
4. bit message territory accounts for 4 bits, and value is 4;
5. length message territory is a unit with 4 bytes, accounts for 4 bits, and start message territory sequence number is 4, and end message territory sequence number is 16;
6. byte message territory accounts for 1 byte, and value is 00;
7. length message territory is a unit with 1 byte, accounts for 2 bytes, and start message territory sequence number is 4, and end message territory sequence number is 20;
8. byte message territory accounts for 2 bytes, is worth to be 7c19;
9. bit message territory accounts for 3 bits, and value is 0;
10. bit message territory accounts for 13 bits, and value is 00;
11. byte message territory accounts for 1 byte, value is 01;
12. byte message territory accounts for 1 byte byte, value is 02;
13. check and message territory account for 2 bytes, adopt radix-minus-one complement summation algorithm, start message territory sequence number is 4, and end message territory sequence number is 16;
14. byte message territory accounts for 4 bytes, is worth to be 0a6e8a41;
15. byte message territory accounts for 4 bytes, is worth to be e0000009;
16. byte message territory accounts for 4 bytes, value is 94040000;
17. byte message territory accounts for 1 byte, value is 16;
18. byte message territory accounts for 1 byte, value is 00;
19. check and message territory account for 2 bytes, adopt radix-minus-one complement summation algorithm, start message territory sequence number is 17, and end message territory sequence number is 20;
20. byte message territory accounts for 4 bytes, is worth to be e0000009;
21. byte message territory accounts for 14 bytes, value is 0000000000000000000000000000;
According to realization flow of the present invention shown in Figure 2, the byte stream that exportable this message is complete is:
01005e00000900c0dfb279af0800460000207c190000010234060a6e8a41e0000009
94040000160009f6e00000090000000000000000000000000000。
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. a message forming method is used to generate various data communication protocol messages, it is characterized in that, comprises the steps:
A, be bit message territory, byte message territory, character string message territory, length message territory and check and message territory with the abstract classifying and dividing in various messages territory of the concrete message format of each data communication protocol;
B, each message territory of the concrete message format of data communication protocol to be generated is referred to described bit message territory, byte message territory, character string message territory, length message territory and check and message territory;
C, according to each message territory of the concrete message format of data communication protocol to be generated input parameter value in described bit message territory, byte message territory, character string message territory, length message territory or the check and the message territory of its ownership, the complete bytes stream of this data communication protocol message of arrangement output.
2. message forming method according to claim 1 is characterized in that step b comprises:
B1, successively the message territory of sorting out is numbered according to the message territory in the concrete form of data communication protocol message order;
B2, determine to be referred to each message territory shared length and value in the concrete message format of data communication protocol to be generated in described bit message territory, byte message territory, the character string message territory, and the shared length in described length message territory, the long measure of representative, the start message territory sequence number and the end message territory sequence number of representative length range, start message territory sequence number and end message territory sequence number and the check of being adopted and the algorithm of the shared length of described check and message territory, institute's test range;
B3, according to the number order in message territory, import all message field parameter values of this message successively, if length message territory or check and message territory, then the value in incoming message territory is changed to 0;
Step c comprises:
C1, according to the parameter value in incoming message territory, generate the bit stream in each message territory successively, and this bit stream appended to the afterbody that this message has generated bit stream;
C2, the full bit stream of this message is converted to byte stream;
C3, according to the value that the start message territory sequence number and the end message territory sequence number of described length message territory representative length range are determined described length message territory, then the value that obtains is inserted the relevant position of this length message territory at above-mentioned message byte stream;
C4, according to from last check and message territory to the order in the most previous check and message territory, successively according to the start message territory sequence number and the end message territory sequence number of described check and message territory institute test range, and the check of being adopted and algorithm determine the value in described check and message territory, then the value that obtains inserted this check and the message territory relevant position at above-mentioned message byte stream;
C5, export the complete bytes stream of this message.
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| CN103259727B (en) | 2012-08-31 | 2016-12-28 | 杭州华三通信技术有限公司 | A kind of message forwarding method and equipment |
| CN103595632B (en) * | 2013-11-20 | 2017-01-04 | 大连梯耐德网络技术有限公司 | Self-defined many transmitting systems of a kind of adj sp and its implementation |
| CN108632434B (en) * | 2018-05-07 | 2021-01-19 | 宁波大学 | Message processing method for mobile intelligent terminal |
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|---|---|---|---|---|
| US5822520A (en) * | 1995-12-26 | 1998-10-13 | Sun Microsystems, Inc. | Method and apparatus for building network test packets |
| CN1253454A (en) * | 1998-10-29 | 2000-05-17 | Lg情报通信株式会社 | Device and method of using frame structured video data transmitting and receiving |
| EP1351472A2 (en) * | 2002-04-01 | 2003-10-08 | Samsung Electronics Co., Ltd. | Forming RTP packets |
| US20050111448A1 (en) * | 2003-11-25 | 2005-05-26 | Narad Charles E. | Generating packets |
-
2005
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5822520A (en) * | 1995-12-26 | 1998-10-13 | Sun Microsystems, Inc. | Method and apparatus for building network test packets |
| CN1253454A (en) * | 1998-10-29 | 2000-05-17 | Lg情报通信株式会社 | Device and method of using frame structured video data transmitting and receiving |
| EP1351472A2 (en) * | 2002-04-01 | 2003-10-08 | Samsung Electronics Co., Ltd. | Forming RTP packets |
| US20050111448A1 (en) * | 2003-11-25 | 2005-05-26 | Narad Charles E. | Generating packets |
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