CN101547156A - Message parsing method and device - Google Patents
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- CN101547156A CN101547156A CN200910136249A CN200910136249A CN101547156A CN 101547156 A CN101547156 A CN 101547156A CN 200910136249 A CN200910136249 A CN 200910136249A CN 200910136249 A CN200910136249 A CN 200910136249A CN 101547156 A CN101547156 A CN 101547156A
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Abstract
The embodiment of the invention discloses a message parsing method and device. In the technical scheme provided by embodiment of the invention, extensibility of message parsing device can be implemented by configurable protocol template; the message parsing device can agilely process network message of newly added protocol, thereby solves problem of lack of extensibility of existing message parsing device, further decreases problems of raised production cost, prolonged market period and resource waste resulting from poor adaptability of the existing message parsing device. The technical scheme of the embodiment can be used in digital communication device.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of message parsing method and device.
Background technology
The existing parsing in the clock message technology will be finished fixed position bytes match and checking algorithm and be calculated.The fixed position bytes match can be taken out relevant information in the fixed position of clock message, and the fixed position byte content mainly contains two kinds: the one, and the protocol type byte; The 2nd, hexa-atomic group of information, i.e. SMAC (source physical address), DMAC (target physical address), SIP (source network protocol address), DIP (purpose internet protocol address), SPORT (source port) and DPORT (destination interface).It is errorless that checking algorithm calculating can determine whether clock message receives, verification is calculated will be at MAC (Media Access Control, media interviews control) layer CRC (the Cyclic Redundancy Check that finishes dealing with, cyclic redundancy check (CRC)) 32 verification, IP (InternetProtocol, Internet protocol) layer IP the verification of finishing dealing with, transport layer is finished UDP (User DatagramProtocol, user datagram protocol) verification, these checking algorithms are that unit carries out with byte or double byte all.These checking algorithms are fixed, and whether the check value that carries in the calculated value that some byte of input clock message is obtained through checking algorithm computing and the clock message compares, receive errorless with definite message.
In the device of existing parsing clock message, after the clock message input N parallel branches arranged, the clock message of each branch is resolved by corresponding protocols, each protocol process module is finished the parsing of respective protocol message, if find that in resolving the input clock message is the clock message of this protocol process module correspondence, then export analysis result, simultaneously to selecting control module to provide the parsing effective marker.If find that in resolving the input clock message is not the clock message of this protocol process module correspondence, then do not export analysis result output, simultaneously to selecting control module to provide the parsing invalid flag.Select control module to select the parsing output of respective protocol processing module according to the parsing effective marker of all protocol process module outputs.
In the device of above-mentioned parsing clock message, if the new agreement of clock message support just must increase new protocol process module, and design logic and exploitation code again, can not expand the analytic message device easily, lack flexibility.Will cause product development cost to rise like this, the launch cycle is delayed, and original product can't support new function, will be eliminated, and causes the wasting of resources.
Summary of the invention
Embodiments of the invention provide a kind of message parsing method and device, can solve the problem that existing analytic message device lacks the expansion flexibility.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of message parsing method comprises:
Receive message;
The template that message definite and described reception is complementary in the template that prestores;
Utilize the template of determining that described message is resolved, and the output analysis result.
A kind of packet parsing device comprises:
The message matching unit is used to receive message;
Configurable model agreement unit is used to store the template that message is resolved;
Template selection unit is used for selecting the template of described configurable model agreement unit;
Described message matching unit also is used for the template that the message of described reception and described template selection unit are chosen is mated, and the output matching result;
The message processing and control element (PCE) is used for determining the template that the message with described reception is complementary according to the matching result of described message matching unit, utilizes the template of determining that the message of described reception is resolved, and the output analysis result.
A kind of message parsing method and device that the embodiment of the invention provides, the template of the analytic message that prestores earlier according to the template that the message selection that receives is complementary, is resolved the message that receives.The technical scheme that the embodiment of the invention provides utilizes configurable model agreement to realize the autgmentability of analytic message device, make this analytic message device can handle the message of various newly-increased agreements flexibly, thereby having solved existing packet parsing device can not expand easily, lack the problem of flexibility, and then reduced that the product cost that existing packet parsing device bad adaptability brings rises, problems such as the listing cycle prolongs, the wasting of resources.
Description of drawings
Fig. 1 is the described message parsing method flow chart of the embodiment of the invention;
Fig. 2 is the structural representation of single template in the described packet parsing device of the embodiment of the invention;
Fig. 3 is the described message parsing method flow chart of the embodiment of the invention;
Fig. 4 is the described message parsing method flow chart of the embodiment of the invention;
Fig. 5 is the described packet parsing device of an embodiment of the invention block diagram.
Embodiment
The embodiment of the invention provides a kind of message parsing method, device, below in conjunction with accompanying drawing the embodiment of the invention is described in detail:
Embodiment one:
The embodiment of the invention provides a kind of message parsing method, below in conjunction with Fig. 1 this method is introduced.
As shown in Figure 1, this method can comprise:
101, receive message.
102, the template that message definite and described reception is complementary in the template that prestores.
In the embodiment of the invention, can adopt RAM (random access storage device) storage protocol template.Whole ram space can be divided into the experimental process ram space, template of each sub-ram space storage, each template can corresponding a kind of agreement, and several templates that prestores are arranged in whole ram space, and the template data in the sub-ram space can be configured with the form of message regulation.The capacity of RAM memory space has determined the quantity of the template that can support, thereby as long as reserve enough RAM memory spaces, just can support to increase newly the message of agreement.
After receiving message, in the template that prestores, choose template and this message mates trial, can in the template that prestores, choose a template arbitrarily and this message mates trial, also can choose template one by one and this message mates trial according to the order of the template that prestores.
Message parsing method in the embodiment of the invention goes for various messages, for example clock message.With the clock message is example, and as shown in Figure 2, the specification of a template can be 16bit (width) xD (degree of depth), depth D 〉=L (L is actual message length, is unit with the byte).10,11,12,13,14,15 positions that are respectively word in the template (double byte), these locational values need be finished the fixed position bytes match.Fixed position byte content B0, B1, B2, B3, B4, B5 insert bit7～0 row of position 10,11,12,13,14,15 corresponding words in the template respectively, simultaneously the bit11 of position 10,11,12,13,14,15 corresponding words is capable in template inserts 1, shows that this position byte need do bytes match.The position of bit8 behavior 1 shows in the byte of this position need do the CRC32 verification, i.e. MAC layer verification; The position of bit9 behavior 1 shows in the byte of this position need do IP verification; The position of bit10 behavior 1 shows in the byte of this position need do the UDP verification.Bit12～15 all positions of row insert 0, and temporary transient reservation need not.That is to say, whether take the byte of relevant position in the clock message and do corresponding operating whether need look the bit of this location definition effective at the capable arithmetic operation that can define 8 kinds of the high 8bit of this template based on byte.
After receiving clock message, in the template that prestores, choose template and this clock message mates trial, can in the template that prestores, choose a template arbitrarily and this clock message mates trial, also can choose template one by one and this clock message mates trial according to the order of the template that prestores.Wherein, coupling attempt can be according to selected template to the clock message data that receive carry out MAC layer CRC check and, an IP verification and and the UDP verification and calculating, and the data to the fixed position compare, then according to the result of verification and result calculated and Data Matching contrast, just can judge whether the template of choosing is complementary with the clock message that receives.If the match is successful, then utilize this template that the clock message that receives is resolved, determine this template simultaneously.
103, utilize the template of determining that described message is resolved, and the output analysis result.
The template of determining is that the match is successful with the message that receives, can resolve the message that receives, the corresponding agreement of message that prestores and receive in the template of determining utilizes described agreement that the message that receives is resolved, and the output analysis result.The process of utilizing message protocol that message is resolved belongs to prior art, does not repeat them here.
If the template that the message that can not find and receive in the template that prestores is complementary illustrates in the template that prestores not template that should message, only need increase with the corresponding template of this message and get final product at the RAM memory space of reserving.
A kind of message parsing method that the embodiment of the invention provides, the template of the analytic message that prestores earlier according to the template that the message selection that receives is complementary, is resolved the message that receives.If newly-increased message is arranged, the template that only need increase corresponding newly-increased message in the ram space of reserving gets final product, need not eliminate existing product, the technical scheme that the embodiment of the invention provides utilizes configurable template to make this message parsing method can handle various messages flexibly, can not expand easily thereby solved existing packet parsing device, lack the problem of flexibility.
Embodiment two:
Further, in order to reduce the time of analytic message cost, need control to mate the time of trial, the embodiment of the invention provides another kind of message parsing method, and as shown in Figure 3, this method can comprise:
301, receive message.
302, in the template that prestores, choose template and this message mates trial.
The embodiment of the invention adopts RAM (random access storage device) storage protocol template, and it is described that reference example one specifically is set.After receiving message, in the template that prestores, choose template and this message mates trial, can in the template that prestores, choose a template arbitrarily and this message mates trial, also can choose first template and this message mates trial according to the order of the template that prestores.
The process that this coupling is attempted can repeat no more with reference to the associated description of front embodiment herein.
303, judge that whether the match is successful in first Preset Time, if not, turns to step 304, if turn to step 305.
In order to reduce the time of analytic message cost, need control to mate the time of trial, for example, first Preset Time can be set, if coupling is unsuccessful within first Preset Time, then from the template that prestores, chooses a template and described message again and mate trial.The length of this first Preset Time can be provided with according to user's needs.Wherein, can control the time of mating trial by a first timer, mate and start first timer when attempting choosing template and this message, if after first timer is overtime, still can not the match is successful, then from the template that prestores, choose a template and described message again and mate trial.
304, choose template again and this message mates trial.
In this step, next template and the message that can choose when front template mate trial.If still can not the match is successful after first timer is overtime, then turn to when the next template of front template to mate trial, repeating step 303 if the match is successful before first timer is overtime, turns to step 305.
305, determine the template of this template that the match is successful, utilize this template of determining that message is resolved for message is resolved, and the output analysis result.
If the match is successful in first Preset Time, then determine the template of this template for message is resolved, utilize this template that message is resolved, just utilize the agreement of this template the inside storage that message is resolved, and the output analysis result.
A kind of message parsing method that the embodiment of the invention provides mates message that receives and the template that prestores, and the template of selecting to be complementary is resolved the message that receives.If the message of newly-increased agreement is arranged, the template that only needs to increase corresponding newly-increased protocol massages gets final product, need not eliminate existing product, the technical scheme that the embodiment of the invention provides can be handled the message of various newly-increased agreements flexibly, can not expand the analytic message device easily thereby solved existing packet parsing device, lack the problem of flexibility.Further, control the time of mating trial, can reduce the time of analytic message cost, raise the efficiency by first Preset Time is set.
Embodiment three:
Further, the embodiment of the invention provides another kind of message parsing method, and as shown in Figure 4, this method can comprise:
401, receive message;
402, in the template that prestores, choose template and this message mates trial, determine the template that is complementary with described message;
403, utilize the template of determining that described message is resolved, and the output analysis result;
The concrete implementation of above-mentioned steps 401-403 can reference implementation one or embodiment two in associated description.
After the step 403, can continue to utilize above-mentioned definite template that the follow-up message that receives is resolved, the follow-up message that receives can be that current message is being resolved, and receive behind the output analysis result, also can when current message is resolved, receive,, then need the follow-up message that receives is kept in if when current message is resolved, receive subsequent packet, after having resolved current message, the follow-up message that receives is resolved.If the message that receives in the follow-up message that receives and 401 is same agreement, so just can utilize this definite template that the message that receives is resolved, and output analysis result, if the message different agreement that receives in the follow-up message that receives and 401, then do not have analysis result output, need redefine the template of coupling.Specifically can be as follows:
404, continue to receive message;
405, utilize the template of determining that the described message that continues to receive is resolved;
406, judge whether analysis result output is arranged in second Preset Time,, turn to step 402,, then directly export this analysis result if analysis result output is arranged if there is not analysis result output.
In this step, one second Preset Time can be set, the length of this second Preset Time can be provided with according to actual needs.Particularly, can control this second Preset Time by a second timer.If in second Preset Time, there is not analysis result output, the message different agreement that receives in the follow-up message that receives and 401 then is described, need in the template that prestores, redefine the template that is complementary with the described follow-up message that receives, and utilize the new template of determining that the follow-up message that receives is resolved, the output analysis result that is to say execution in step 402-403; If analysis result output is arranged in second Preset Time, illustrates that the message that receives in the follow-up message that receives and 401 is same agreement, directly exports this analysis result.
Need to prove, also this second Preset Time can be set, that is to say when follow-up when receiving message, not execution in step 405-406, but directly in the template that prestores, determine to resolve with the template of the follow-up message coupling that receives, that is to say direct execution in step 401-403.
A kind of message parsing method that the embodiment of the invention provides, when current definite template can not be resolved the message that newly receives, again choosing template mates with the message that receives, and utilize the template of coupling that message is resolved, wherein, restart to determine the time of template by the control of second Preset Time, can be when current definite template can not be resolved the follow-up message that receives, redefine the template that to resolve the follow-up message that receives as early as possible, avoid to export analysis result for a long time, raise the efficiency.
Embodiment four:
The embodiment of the invention also provides a kind of packet parsing device, and as shown in Figure 5, this device can comprise: configurable model agreement unit 501, template selection unit 502, message matching unit 503 and message processing and control element (PCE) 504.
Wherein, configurable model agreement unit 501 is used to store the template that message is resolved, and storage can be realized with RAM in configurable model agreement unit 501, and whole RAM is divided into experimental process RAM, each sub-RAM stores a kind of template of agreement, can resolve a kind of message of agreement;
Particularly, can be finished the function of message matching unit by a plurality of modules, for example, message matching unit 503 can comprise message receiver module, read module, matching module and sending module.Wherein, the message receiver module is used to receive message, read module is used to read message and the template data that receives, and matching module is used for message and template selection unit 502 selected templates are mated trial, and sending module is used for matching result is sent to message control unit 504;
Message processing and control element (PCE) 504 can be used for the template of control template selected cell 502 501 storages in configurable model agreement unit and select a template that the message that message coupling resolution unit 503 receives is resolved, and come in the template that prestores, to determine a template that is complementary with described message according to the matching result that message matching unit 503 sends, utilize the template of determining that described message is resolved, and the output analysis result.
Particularly, particularly, can be finished the function of message processing and control element (PCE) by a plurality of modules, for example, message processing and control element (PCE) 503 can comprise receiver module, determination module and parsing module.Wherein, receiver module is used to receive the matching result that the message matching unit sends, the matching result that determination module is used for sending according to the message matching unit to determine a template that is complementary with described message in the template that prestores, parsing module is used to utilize definite template that described message is resolved, and the output analysis result.
Further, storage can be realized with a RAM in configurable model agreement unit 501, for example, whole ram space is divided into M sub-ram space, and wherein software is with N wherein of the template style configuration of the definition (template of N＜=M).The capacity of RAM memory space has determined the quantity of the model agreement that can support, so as long as reserve enough RAM memory spaces, just can be when the message of New Deal type occurring, in the RAM memory space of reserving, dispose the message of template corresponding, thereby satisfy the autgmentability demand with support New Deal type.
Workflow to this device is introduced below:
After message matching unit 503 received message, template selection unit 502 selected a template in the configurable model agreement unit 501 that described message is resolved.
With the clock message is example, message matching unit 503 is that unit reads in the message data that receives and the template data of selection successively with the byte, according to template data to the clock message data that receive carry out MAC layer CRC check and, an IP verification and, the UDP verification and calculating, and to the fixed position data coupling of comparing.Thereby whether the result according to verification and result calculated and Data Matching comparison is complementary with described clock message to the selected template of message processing and control element (PCE) indication.
If selected template and described message coupling, then the message processing and control element (PCE) is determined the template of this template for message is resolved, and utilizes this template that message is resolved, and the output analysis result.If selected template and described message do not match, then message processing and control element (PCE) control template selected cell is reselected template, until finding out the template that is complementary with described message.
S0: idle condition.Circuit start or when resetting, the message matching unit is in the S0 state.When the message matching unit can read in message, state can be gone into S1 from the S0 redirect.
S1: template search condition.After entering the S1 state from the S0 state, all templates that the message processing and control element (PCE) is taken in the configurable model agreement unit are one by one mated trial to the message of input.Be specially: template and described message that the control template selected cell is chosen in the configurable model agreement unit mate trial, if the match is successful, then definite this template is resolved message, and message matching unit operating state changes packet parsing state S2 over to;
S2: packet parsing state.At the S2 state, this device has been determined a template that is complementary with described message, the template analytic message that utilizes this to determine.This moment, the message matching unit received message, and read in message data.
Further, the message processing and control element (PCE) can also comprise first timer, and first timer is used for the time that when the message matching unit is in state S1 control template and message are mated trial.
Further, the message processing and control element (PCE) can also comprise second timer, after determining the template that message is resolved, if the follow-up message that receives is same agreement with the message that receives before, so just can utilize this definite template that the follow-up message that receives is resolved, and output analysis result, if follow-up message that receives and the message different agreement that receives before, then there is not analysis result output, need redefine the template of coupling, second timer just is used in the time can not exporting analysis result, the time that the template search procedure is restarted in control.Application to first timer and second timer is introduced below:
When message coupling resolution unit is in the S1 state, message processing and control element (PCE) control template selected cell is chosen in the configurable model agreement unit one and is mated trial when front template and described message, can utilize first timer control template and message to mate the time of trial, when choosing template and message to mate trial, start first timer, if the match is successful before first timer is overtime, then definite utilization is worked as front template message is resolved, if still can not the match is successful after first timer is overtime, then still be in template search condition S1, turn to next template, until definite template that is complementary with described message when front template.The time that this first timer is provided with can also be first Preset Time, and the first timer and first Preset Time can be provided with according to actual needs.
After determining a template that is complementary with described message, if receive subsequent packet again, continue to utilize above-mentioned definite template that the follow-up message that receives is resolved, the follow-up message that receives can be that current message is being resolved, and receive behind the output analysis result, also can when being resolved, current message receive, if when current message is resolved, receive subsequent packet, then this device also comprises memory cell, the follow-up message that receives is kept in, after having resolved current message, the message that the memory cell the inside is stored is resolved again, empties memory cell simultaneously.
If follow-up message that receives and described message are same agreements, so just can utilize this definite template that the follow-up message that receives is resolved, and output analysis result, if follow-up message that receives and described message are different agreements, then do not have analysis result output, need redefine template with the follow-up message coupling that receives.Can utilize second timer control to restart to determine the time of template, have particular application as: when receiving subsequent packet, start second timer,, analysis result output is arranged, just no longer redefine template if before second timer is overtime; If after second timer is overtime, there is not analysis result output, then change template search condition S1 again over to, restart the template search procedure, redefine the template that can be complementary with the follow-up message that receives.The time that this second timer is provided with can also be second Preset Time, and the second timer or second Preset Time can be provided with according to actual needs.
The device of the analytic message that the embodiment of the invention provides can be applied in the clock server.
A kind of packet parsing device that the embodiment of the invention provides utilizes the prestore template of analytic message of ram space, selects the template that is complementary according to the message that receives, and the message that receives is resolved.If the message of newly-increased agreement is arranged, the template that only need increase corresponding newly-increased protocol massages in the ram space of reserving gets final product, need not eliminate existing product, the technical scheme that the embodiment of the invention provides utilizes configurable model agreement to realize the autgmentability of analytic message device, make this analytic message device can handle the message of various newly-increased agreements flexibly, thereby having solved existing packet parsing device can not expand the analytic message device easily, lack the problem of flexibility, and then reduced the product cost rising that existing packet parsing device bad adaptability is brought, the listing cycle prolongs, problems such as the wasting of resources.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program is when carrying out, the above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (11)
1, a kind of message parsing method is characterized in that, comprising:
Receive message;
The template that message definite and described reception is complementary in the template that prestores;
Utilize the template of determining that described message is resolved, and the output analysis result.
2, message parsing method according to claim 1 is characterized in that, the described template that message definite and described reception is complementary in the template that prestores comprises:
The template in the described template that prestores and the message of described reception are mated;
Judge whether described coupling is successful;
If described the match is successful, then will be somebody's turn to do the template that the match is successful and be defined as the template that is complementary with described reception message.
3, message parsing method according to claim 2 is characterized in that, the described template that message definite and described reception is complementary in the template that prestores also comprises:
The match is successful if do not have in first Preset Time, and the message of then choosing template and described reception from the described template that prestores again mates.
4, message parsing method according to claim 2 is characterized in that, when described message was clock message, described message with template in the described template that prestores and described reception mated and comprises:
According to described template to the data of the message of described reception carry out the MAC layer cyclic redundancy check (CRC) and, the verification of Internet protocol head and, the user datagram protocol verification and calculating, and the data of the message fixed position of described template and described reception are compared;
Then describedly judge whether described coupling successfully comprises:
According to described result of calculation and comparing result judge described template whether with the message coupling of described reception.
5, according to each described message parsing method of claim 1-4, it is characterized in that this method also comprises:
Utilize described definite template that the follow-up message that receives is resolved,, then in the template that prestores, redefine the template that is complementary with the described follow-up message that receives if in second Preset Time, there is not analysis result output.
6. according to the described message parsing method of claim 1-4, it is characterized in that described method also comprises:
If in the described template that prestores not with the template of the described message coupling that receives, then increase template with described message coupling to the described template that prestores.
7, a kind of packet parsing device is characterized in that, this device comprises:
The message matching unit is used to receive message;
Configurable model agreement unit is used to store the template that message is resolved;
Template selection unit is used for selecting the template of described configurable model agreement unit;
Described message matching unit also is used for the template that the message of described reception and described template selection unit are chosen is mated, and the output matching result;
The message processing and control element (PCE) is used for determining the template that the message with described reception is complementary according to the matching result of described message matching unit, utilizes the template of determining that the message of described reception is resolved, and the output analysis result.
8, packet parsing device according to claim 7 is characterized in that,
The message processing and control element (PCE) also is used for selecting template according to matching result or analysis result control template selected cell in the template of described configurable model agreement unit storage.
9, packet parsing device according to claim 7, it is characterized in that, described configurable model agreement unit adopts random access storage device to store described template, described random access storage device comprises sub-random access storage device, template of each sub-random access storage device storage, described template is resolved the message of respective protocol.
10, according to the device of claim 7 or 8 described analytic messages, it is characterized in that, the match is successful if do not have in first Preset Time, and then described message processing and control element (PCE) controls that described template selection unit is chosen template again from the described template that prestores and described message mates.
11, the device of analytic message according to claim 7, it is characterized in that, if the message processing and control element (PCE) does not have analysis result when output, described message processing and control element (PCE) to control that described template selection unit is chosen template again from the described template that prestores and the described follow-up message that receives mates within second Preset Time.
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