CN107733803A - Multicast message filter method, device and multicast message receiving device - Google Patents
Multicast message filter method, device and multicast message receiving device Download PDFInfo
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- CN107733803A CN107733803A CN201610657252.0A CN201610657252A CN107733803A CN 107733803 A CN107733803 A CN 107733803A CN 201610657252 A CN201610657252 A CN 201610657252A CN 107733803 A CN107733803 A CN 107733803A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/16—Multipoint routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/0227—Filtering policies
- H04L63/0236—Filtering by address, protocol, port number or service, e.g. IP-address or URL
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Abstract
The invention discloses a kind of multicast message filter method, device and multicast message receiving device, wherein method includes：Receive current multicast message；By the number for extracting correspondent section in the current multicast address of current multicast message step by step；The first filtration parameter according to corresponding to being determined in the digital filtration parameter as the appropriate level pre-set extracted, and the filtering of current multicast message is carried out according to the first filtration parameter of determination step by step.Its filtering by carrying out current multicast message according to the filtration parameter of each rank pre-set, can be in strict accordance with the reception transmission for subscribing to multicast message progress multicast message, and non-subscribed message is masked completely, so as to effectively increase the filtering accuracy of multicast message, finally solves the problem of traditional multicast filtering algorithm filtering accuracy is low, and easily the operation to device brings certain risk.
Description
Technical field
The present invention relates to network communication technology field, more particularly to a kind of multicast message filter method, device and multicast
Message receiving device.
Background technology
As the development of intelligent substation, and ethernet technology apply increasingly extensive, network data in industrial circle
Communication is increasingly becoming the major way of industrial data interaction.Wherein, because the multicast filtering algorithm of traditional MAC hardware is generally adopted
With the mode of operation that unified multilevel iudge is carried out to the purpose MAC in message, so as to when receiving multicast message increase, its multicast
Filter capacity is gradually reduced, and this just easilys lead to some unwanted messages and received.For multicast message in transformer station
(such as：GOOSE message or SMV messages) receiving device, generally require to receive the message of many different multicast address, thus when
When carrying out multicast message filtering using above-mentioned multicast filtering algorithm, it is easy to cause the transmission of some non-subscribed messages so that dress
Put and adds additional some uncertain inputs, the operation to device brings certain risk.
The content of the invention
Based on this, it is necessary to which low for traditional multicast filtering algorithm filtering accuracy, the easily operation to device brings one
The problem of fixed risk, there is provided a kind of multicast message filter method, device and multicast message receiving device.
To realize a kind of multicast message filter method of the object of the invention offer, comprise the following steps：
Receive current multicast message；
By the number for extracting correspondent section in the current multicast address of the current multicast message step by step；
The first mistake according to corresponding to being determined in the digital filtration parameter as the appropriate level pre-set extracted
Parameter is filtered, and carries out the filtering of the current multicast message step by step according to first filtration parameter of determination.
In one of the embodiments, the filtration parameter of appropriate level is according to the target of the target multicast message of subscription
Multicast address is set dynamically step by step, and the number of the filtration parameter of each rank and different sections in the target multicast address
It is corresponding.
In one of the embodiments, the rank of the filtration parameter include primary filter parameter, secondary filter parameter and
Final stage filtration parameter；And
The primary filter parameter is type enabler flags, and the secondary filter parameter is to organize an enabler flags, the final stage
Filtration parameter is position enabler flags；
The filtration parameter of appropriate level is set dynamically step by step according to the target multicast address of the target multicast message of subscription, wraps
Include following steps：
Preceding four bytes of the target multicast address are divided into target type code, and the target type code is set
The corresponding type enabler flags are as the primary filter parameter；
5th byte of the target multicast address is divided into target group code, and the target group code set corresponding
Described group of enabler flags as the secondary filter parameter；
6th byte of the target multicast address is divided into target bit code, and the target bit code set corresponding
Institute's rheme enabler flags as the final stage filtration parameter.
In one of the embodiments, phase is extracted step by step in the current multicast address by the current multicast message
When answering the number of section, including extract the step of preceding four bytes of the current multicast address are as current type code；
The basis extracts described digital the as corresponding to being determined in the filtration parameter of the appropriate level pre-set
One filtration parameter, and when carrying out the filtering of the current multicast message step by step according to first filtration parameter of determination, including：
The first kind enabler flags according to corresponding to being searched the current type code, and according to the presence of the first kind enabler flags
The step of state and current enabled state carry out the primary filter of the current multicast message.
In one of the embodiments, the existence according to the first kind enabler flags and shape is currently enabled
State carries out the primary filter of the current multicast message, comprises the following steps：
Judge that the first kind enabler flags whether there is, and the currently enabled shape of the first kind enabler flags
Whether state is enabled；
When judging that the first kind enabler flags are present and current enabled state is enables, retain described current
The current multicast message is simultaneously transferred to next stage corresponding with the first kind enabler flags by multicast message；
When judging that the first kind enabler flags are not present or current enabled state is is not enabled on, described work as is abandoned
Preceding multicast message.
In one of the embodiments, phase is extracted step by step in the current multicast address by the current multicast message
When answering the number of section, including the 5th byte of the extraction current multicast address is used as current the step of organizing code；
The basis extracts described digital the as corresponding to being determined in the filtration parameter of the appropriate level pre-set
One filtration parameter, and when carrying out the filtering of the current multicast message step by step according to first filtration parameter of determination, including：
First group of enabler flags according to corresponding to being searched the current group code, and according to the existences of first group of enabler flags and
The step of current enabled state carries out the secondary filter of the current multicast message；
When extracting the number of correspondent section step by step in the current multicast address by the current multicast message, in addition to
Extract the step of the 6th byte of the current multicast address is as current bit code；
The basis extracts described digital the as corresponding to being determined in the filtration parameter of the appropriate level pre-set
One filtration parameter, and when carrying out the filtering of the current multicast message step by step according to first filtration parameter of determination, including：
First enabler flags according to corresponding to searching the current bit code, and according to the existences of first enabler flags and
Current enabled state carries out the step of final stage filtering of the current multicast message.
Accordingly, present invention also offers a kind of multicast message filter, including the multiple filters set step by step, and
The filter of each rank includes the filtration parameter module and filter algorithm module of appropriate level；
The filter algorithm module of each rank, for receiving current multicast message, and by the current multicast message
Current multicast address in extract the number of correspondent section corresponding with its rank；
The filter algorithm module of each rank, it is additionally operable to according to the number extracted as described in appropriate level
First filtration parameter corresponding to being determined in the filtration parameter that filtration parameter module is pre-set, and according to first mistake of determination
Filter the filtering that parameter carries out the current multicast message of appropriate level.
In one of the embodiments, the filtration parameter module of each rank, for the target multicast according to subscription
The filtration parameter of the target multicast address dynamic setting appropriate level of message；And the filtration parameter mould of each rank
The filtration parameter set by block from the target multicast address different sections it is digital corresponding.
In one of the embodiments, the rank of the filter is three-level, and the filter of each rank is respectively：It is primary
Filter, secondary filter and final filter；
Wherein, the filtration parameter that the primary filter is set is type enabler flags, what the secondary filter was set
Filtration parameter is group enabler flags, and the filtration parameter that the final filter is set is position enabler flags；
Filtration parameter module in the primary filter includes einer Primargrosse and sets submodule and einer Primargrosse storage
Module；
The einer Primargrosse sets submodule, for preceding four bytes of the target multicast address to be divided into target class
Type code, and corresponding type enabler flags are set as primary filter parameter to the target type code；
The einer Primargrosse sub-module stored, for storing the type enabler flags；
Filtration parameter module in the secondary filter includes secondary parameter and sets submodule and secondary parameter storage
Module；
The secondary parameter sets submodule, for the 5th byte of the target multicast address to be divided into a group code,
And corresponding group enabler flags are set to described group of code as secondary filter parameter；
The secondary parameter sub-module stored, for storing described group of enabler flags；
Filtration parameter module in the final filter includes final stage parameter setting submodule and final stage parameter storage
Module；
The final stage parameter setting submodule, for the 6th byte of the target multicast address to be divided into bit code,
And corresponding position enabler flags are set to the bit code as final stage filtration parameter；
The final stage parameter sub-module stored, the rheme enabler flags for storing.
In one of the embodiments, the primary filter algoritic module in the primary filter includes primary extraction submodule
Block and primary filter submodule；
The primary extraction submodule, preceding four bytes for current multicast address described in primary extraction are as current class
Type code；
The primary filter submodule, for according to the current type code that the primary extraction submodule extracts by
First kind enabler flags corresponding to being searched in the einer Primargrosse sub-module stored, and according to the first kind enabler flags
Existence and current enabled state carry out the primary filter of the current multicast message.
In one of the embodiments, the primary filter submodule include primary judging unit, primary transfer unit and
Primary discarding unit；
The primary judging unit, for judging that the first kind enabler flags whether there is, and the first kind
Whether the current enabled state of type enabler flags is enabled；
The primary transfer unit, for judging that the first kind enabler flags are present when the primary judging unit
And current enabled state is when enabling, retains the current multicast message and corresponds to the next of the progress current multicast message
Level is transmitted；
The primary discarding unit, for judging that the first kind enabler flags are not deposited when the primary judging unit
Or current enabled state to be not enabled on when, abandon the current multicast message.
In one of the embodiments, the secondary filter algoritic module in the secondary filter includes secondary extraction submodule
Block and secondary filter submodule；
The secondary extracting sub-module, for secondary the 5th byte extracted in the current multicast address as current
Group code；
The secondary filter submodule, for the current group code that is extracted according to the secondary extracting sub-module by institute
First group of enabler flags corresponding to being searched in secondary parameter sub-module stored are stated, and according to the presence of first group of enabler flags
State and current enabled state carry out the secondary filter of the current multicast message；
Final stage filter algorithm module in the final filter includes final stage extracting sub-module and final stage filter submodule；
The final stage extracting sub-module, the 6th byte extracted for final stage in the current multicast address are used as currently
Bit code；
The final stage filter submodule, for the current bit code that is extracted according to the final stage extracting sub-module by institute
First enabler flags corresponding to being searched in final stage sub-module stored are stated, and according to the existence of first enabler flags
And current enabled state carries out the final stage filtering of the current multicast message.
Accordingly, present invention also offers a kind of multicast message receiving device, including network interface, interface and as above any described
Multicast message filter；
The multicast message filter is connected between the network interface and the interface；
The interface, transmitted for setting the multicast address of ordered target multicast message, and by the multicast address
To the multicast message filter；
The multicast message filter, for mistake accordingly to be set dynamically step by step according to the multicast address received
Filter parameter；Wherein, the filtration parameter section different from the multicast address of every grade of setting is digital corresponding；
The network interface, transmitted for obtaining the current multicast message, and by the current multicast message to the multicast
Packet filtering device；
The multicast message filter, it is additionally operable to carry out step by step the current multicast message according to the filtration parameter
Filtering；
The interface, it is additionally operable to connect external equipment, the multicast report as described in the external equipment by the interface
Literary filter filter step by step after multicast message.
Above-mentioned multicast message filter method, after receiving current multicast message, by current group of current multicast message
Broadcast and extract different sections of number in address step by step, and according to the number extracted by the filtering of the appropriate level pre-set
After the first filtration parameter that appropriate level is determined in parameter, current multicast report is carried out step by step further according to the first filtration parameter of determination
The filtering of text.Thus, it is joined when carrying out the filtering of current multicast message by the filtering according to each rank pre-set
Number carries out the filtering of current multicast message so that and multicast message can carry out reception transmission in strict accordance with multicast message is subscribed to, and
Non-subscribed message is masked completely, so as to effectively increase the filtering accuracy of multicast message, finally solves traditional group
Broadcast the problem of filter algorithm filters precision is low, and easily the operation to device brings certain risk.Meanwhile it is carrying out current group
In the filter process for reporting text, also by the way that traditional filter type that united analysis comparison is carried out to current multicast address is replaced
For the mode filtered step by step, make it compared to traditional filter type, can be faster by the multicast message screen of non-subscribed
Cover, so as to also just effectively reduce the load of filtration system.
Brief description of the drawings
Fig. 1 is the flow chart of a specific embodiment of the multicast message filter method of the present invention；
Fig. 2 is the structural representation of a specific embodiment of the multicast message filter of the present invention；
Fig. 3 is the structural representation of a specific embodiment of the multicast message filtration system of the present invention.
Embodiment
To make technical solution of the present invention clearer, the present invention is made below in conjunction with drawings and the specific embodiments further detailed
Describe in detail bright.
Firstly, it is necessary to explanation, multicast (Multicast) transmission refers to：Between sender and each recipient
Realize that point-to-point configuration connects.Multicast message is then some protocol massages transmitted using multicast transmission mode.
Multicast address refers to the target MAC (Media Access Control) address of multicast message.MAC (Medium/Media Access Control,
Medium access control) address, hardware address is also, for representing the identifier of each website on internet, is entered using 16
Number processed represents, totally six bytes (48).
, wherein it is desired to explanation, in a specific embodiment of the multicast message filter method of the present invention, it enters the trade
Before the filtering of preceding multicast message is transmitted, it is necessary first to carry out the setting of the filtration parameter of each rank.Due to each rank
The different attribute of the various multicast messages of reception required for filtration parameter characterizes message receiving device, therefore filtration parameter
Setting can be specifically configured according to the message address ordered by message receiving device.That is, the misgivings parameter of each rank can root
It is set dynamically step by step according to the target multicast address of the target multicast message of subscription.Also, the filtration parameter of each rank is equal
Sections different from target multicast address it is digital corresponding.
It is also desirable to explanation, it dynamically sets step by step according to the target multicast address of the target multicast message of subscription
When putting the filtration parameter of appropriate level, the rank of filtration parameter may be configured as two-stage or three-level.
Specifically, it is described in more detail below exemplified by three-stage filtration parameter is set.When the rank of filtration parameter
For three-level when, now the rank of filtration parameter includes primary filter parameter, secondary filter parameter and final stage filtration parameter.Wherein,
Primary filter parameter is type enabler flags, and secondary filter parameter is group enabler flags, and final stage filtration parameter is then the enabled mark in position
Will.Herein, it is necessary to explanation, the number of the filtration parameter section different from the multicast address of target multicast message of each rank
It is corresponding.
Thus, when carrying out the setting of filtration parameter of each rank, it is necessary to which target multicast address is divided into three sections.Its
In, as a kind of preferable dividing mode：Preceding four bytes of target multicast address are divided into target type code, and to target
Type codes set corresponding type enabler flags.Set type enabler flags are primary filter parameter herein.Wherein, class
The value of type enabler flags can be 0 or 1.When the value of type enabler flags is 0, show the current enabled of type enabler flags
State is to be not enabled on state；When the value of type enabler flags is 1, then the current enabled state for showing type enabler flags is
Enabled state.
Further, the 5th byte of target multicast address is then divided into a group code, and sets corresponding group to the group code
Enabler flags, set group enabler flags are secondary filter parameter herein.Wherein, the value for organizing enabler flags is similarly 0
Or 1.Also, different values characterizes the different enabled states of group enabler flags.
Further, the 6th byte of target multicast address is then divided into bit code, and the bit code is set corresponding
Position enabler flags are as final stage filtration parameter.Wherein, the value of position enabler flags is similarly 0 or 1.Similarly, it is different by setting
Value characterize the different enabled states of an enabler flags.
In addition, it is necessary to further illustrate, because the species of the multicast message (that is, target multicast message) of subscription is a variety of
It is various, therefore in order to ensure that the subscription multicast message of various species normally can be received smoothly, for different multicasts
Message be correspondingly arranged different primary filter parameter (that is, type enabler flags), secondary filter parameter (that is, organize enabler flags) and
Final stage filtration parameter (that is, position enabler flags).That is, because message receiving device usually requires to receive multiple multicast address
Message, therefore accurately can completely be received to ensure compliance with the message of each multicast address of requirement, it is every setting
During the other filtration parameter of one-level, corresponding filtration parameter can be respectively provided with for each multicast address.Thus, by for each
Kind of the multicast address subscribed to is respectively provided with the filtration parameter of corresponding each rank so that the multicast message to receiving carry out by
During level filtering, the filtering per one-level is respectively provided with strict specific aim, and this also just further ensure that multicast message filtering
Accuracy and accuracy.
When the filtration parameter of each rank is respectively provided with completion, you can carry out the step of reception and the filtering of current multicast message
Suddenly.As a specific embodiment of the multicast message filter method of the present invention, based on the setting of above-mentioned three-stage filtration parameter, it enters
During the filtering of row current multicast message, then it is overanxious accordingly to carry out three-level.
Specifically, referring to Fig. 1, after current multicast message is received, the digital extraction of primary stage is carried out first.
That is, by step S100, by extracting preceding four bytes in the current multicast address of current multicast message as current type code,
To realize digital primary extraction.After preceding four bytes in current multicast address are extracted, you can carry out step S200, root
According to the current type code extracted corresponding first is searched by the primary filter parameter (that is, type enabler flags) pre-set is middle
Type enabler flags, and then existence and current enabled state progress current multicast report further according to first kind enabler flags
The primary filter of text.
Specifically, when it carries out primary filter, it whether there is first in the primary filter parameter for first determining whether to pre-set
Type enabler flags, and whether the current enabled state of first kind enabler flags is enabled.
When first kind enabler flags in the primary filter parameter for judging to pre-set being present, and the enabled mark of the first kind
The current enabled state of will for enabled state when, then show that current group of rolling land of now current multicast message only meets subscription
Preceding four bytes of target multicast message.Therefore, the current multicast message can now be retained, and according to preceding four words extracted
Save next stage transmission and secondary filter that (that is, current type code) carries out current multicast message.
When first kind enabler flags are not present in the primary filter parameter for judging to pre-set, or in the presence of first
Still the current enabled state of first kind enabler flags is to be not enabled on state to type enabler flags, then shows current multicast message
Multicast address preceding four bytes do not meet subscription target multicast message preceding four bytes.Therefore, now it is believed that working as
Preceding multicast message does not meet subscription message, can directly be abandoned, and carries out reception and the primary filter behaviour of next multicast message
Make.
Wherein, referring to Fig. 1, when by step S200, after the primary filter for carrying out current multicast message, now meeting and order
Before the target multicast message read the current multicast message of four bytes be passed to it is corresponding with first kind enabler flags under
One-level.Herein, it is necessary to illustrate, because preceding four bytes (that is, current type code) extracted characterize current multicast report
The different attribute of text, therefore when the next stage for carrying out current multicast message transmits, it is according to the current type code extracted
The next stage that current multicast message is transferred to respective type carries out secondary filter.
Specifically, referring to Fig. 1, when it carries out the secondary filter of current multicast message, worked as first by step S300, extraction
The 5th byte in preceding multicast address is as current group code.And then again by step S400, according to the current group of code extracted
By searching first group of corresponding enabler flags in the secondary filter parameter that pre-sets, and depositing according to first group of enabler flags
The secondary filter of current multicast message is carried out in state and current enabled state.Herein, it is necessary to explanation, step S400, root
Carried out according to the existence of first group of enabler flags and current enabled state the mode of the secondary filter of current multicast message with it is upper
The mode that step S200 is stated according to the existence of first kind enabler flags and current enabled state progress primary filter is similar,
Therefore here is omitted.
Referring to Fig. 1, when by step S400, after carrying out secondary filter to current multicast message, now correspond to and have the
The current enabled state of one group of enabler flags and first group of enabler flags is passed to next for the multicast message of enabled state
Level, carry out final stage filtering.Specifically, when it carries out the final stage filtering of current multicast message, worked as first by step S500, extraction
6th byte of preceding multicast message is as current bit code, and then again by step S600, according to the current bit code extracted by
Corresponding first enabler flags are searched in the final stage filtration parameter pre-set, and according to the presence shape of first enabler flags
State and current enabled state carry out the final stage filtering of current multicast message.Similarly, herein according to the presence of first enabler flags
State and current enabled state carry out the principle and S400 points of above-mentioned steps S200 and step of the final stage filtering of current multicast message
The primary filter and secondary filter of current multicast message are not carried out according to first kind enabler flags and first group of enabler flags
Principle is identical, therefore is also no longer repeated herein.
Except that in step S600, carried out according to the existence of first enabler flags and current enabled state
During the final stage filtering of current multicast message, when judging to exist the current enabled of first enabler flags and first enabler flags
State for enabled state when, no longer enter filter operation after now carrying out the transmission of current multicast message, but directly will be currently
Multicast message is transferred to corresponding interface.
It is by carrying out three-stage filtration to current multicast message, and each rank is respectively provided with the filtering ginseng of appropriate level
Number so that the transmission of multicast message avoids the situation that the misconnection of non-subscribed multicast message connects more, protected in strict accordance with reception is subscribed to
The accuracy of multicast message reception has been demonstrate,proved, has which thereby enhanced the security of plant running.Also, also by setting three-stage filtration side
Formula so that non-subscribed multicast message can carry out discard processing in earliest rank, and this also just further improves message mistake
The efficiency of filter, realizes the filtering as early as possible of non-subscribed multicast message, and reduces filtering power consumption.
In addition, it should also be noted that, as the present invention multicast message filter type another specific embodiment, its
Or double-filtration mode.When carrying out the filtering of multicast message using double-filtration mode, the filtration parameter set by it
Rank then accordingly include by-pass filtration parameter and secondary filtration parameter.Wherein, by-pass filtration parameter can be by by subscription
Preceding four bytes of target multicast message are digital as one-level, and set corresponding one-level enabler flags to come in fact to one-level is digital
It is existing.Wherein, one-level enabler flags are by-pass filtration parameter.Further, secondary filtration parameter then can be by by target multicast
The 5th byte and the 6th byte of message are digital collectively as two level, and set corresponding two level to enable to the two level is digital
Mark is realized.Wherein, two level enabler flags are secondary filtration parameter.
Thus, after the filtration parameter (that is, by-pass filtration parameter and secondary filtration parameter) of two ranks is set, the trade is entered
During the filtering of preceding multicast message, preceding four bytes of current multicast address of current multicast message can be extracted first as current
One-level is digital, and according to extracting when previous stage number in the by-pass filtration parameter that pre-sets by searching the corresponding 1st
Level enabler flags, and then presence situation and current enabled state progress current multicast message further according to the first one-level enabler flags
By-pass filtration.After the by-pass filtration of pending complete current multicast message, and then the 5th of current multicast address is extracted again
Byte and the 6th byte are digital as current two level, and according to the current two level number extracted by the two level mistake that pre-sets
Corresponding first two level enabler flags are searched in filter parameter, and then presence situation further according to the first two level enabler flags and current
Enabled state carries out the secondary filtration of current multicast message.
Herein, it is necessary to which explanation, it carries out the principle of the filtering of current multicast message by using secondary filtration mode
It is same or similar with the principle of the foregoing filtering that current multicast message is carried out using three-stage filtration mode, it is different only
It is only that the partition of the level for carrying out filtration parameter and setting are upper different, therefore is no longer repeated herein.
In addition, it should also be noted that, it will appreciated by the skilled person that realize in above-described embodiment method
All or part of flow, it is that by computer program the hardware of correlation can be instructed to complete, described program can be stored in
In one computer read/write memory medium, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Its
In, described storage medium can be magnetic disc, CD, read-only memory (Read-Only Memory, ROM) or random storage
Memory body (Random Access Memory, RAM) etc..
Accordingly, present invention also offers a kind of multicast message filter.Due to multicast message mistake provided by the invention
It is same or similar to filter the principle of the work principle of filter and multicast message filter method provided by the invention of device, therefore repeats part not
Repeat again.
As a specific embodiment of the multicast message filter of the present invention, it includes the multiple filterings set step by step
Device, and the filter of each rank includes the filtration parameter module and filter algorithm module of appropriate level.Wherein, per one-level
Other filter algorithm module, for receiving current multicast message, and by being extracted in the current multicast address of current multicast message
The number of correspondent section corresponding with its rank.The filter algorithm module of each rank, it is additionally operable to according to the number extracted by phase
Answer the first filtration parameter corresponding to being determined in the filtration parameter that the filtration parameter module of rank pre-sets, and according to the of determination
One filtration parameter carries out the filtering of the current multicast message of appropriate level.
Wherein, due to the filtration parameter of each rank with characterizing the various multicasts received required for message receiving device
The message of location, therefore the filtration parameter module of each rank, the target multicast address for the target multicast message according to subscription
The filtration parameter of appropriate level is set dynamically.Herein, it is necessary to explanation, the mistake set by the filtration parameter module of each rank
Filter the digital corresponding of parameter section different from target multicast address.
Specifically, referring to Fig. 2, as a specific embodiment of the multicast message filter 110 of the present invention, filter
Rank may be configured as three-level.Accordingly, the filter of each rank is respectively：Primary filter 111, the and of secondary filter 112
Final filter 113.Wherein, the number of primary filter 111 is arranged to one.The number of secondary filter 112 then has
Body can specifically be set according to the type of ordered target multicast message.The corresponding secondary of different types of multicast message
Filter 112, also, each secondary filter 112 is arranged at after primary filter 111.The then phase of final filter 113
It should be arranged on after each secondary filter 112, and of final filter 113 corresponding to each secondary filter 112
It is several, specifically set according to the digit of the 5th of target multicast address the byte.That is, the 5th word of target multicast address
The digit of section is how many position, then the how many individual final filters 113 of relative set after each secondary filter 112.Namely
Say, the number of the final filter 113 after each secondary filter 112 and the multicast address of target multicast message
The digit of 5th byte is consistent.
And, it is noted that the filtration parameter that primary filter 111 is set is type enabler flags, the secondary
For the filtration parameter that filter 112 is set for group enabler flags, the filtration parameter that the final filter 113 is set is the enabled mark in position
Will.
Specifically, the filtration parameter module in primary filter 111, which includes einer Primargrosse, sets submodule and einer Primargrosse
Sub-module stored (is not shown) in figure.Wherein, einer Primargrosse sets submodule, for by preceding four words of target multicast address
Section is divided into target type code, and sets corresponding type enabler flags as primary filter parameter to target type code.It is primary
Parameter sub-module stored, for storage class enabler flags；
Filtration parameter module in secondary filter 112 includes secondary parameter and sets submodule and secondary parameter storage submodule
Block (is not shown) in figure.Wherein, secondary parameter sets submodule, for the 5th byte of target multicast address to be divided into
Group code, and corresponding group enabler flags are set to group code as secondary filter parameter.Secondary parameter sub-module stored, for storing
Group enabler flags；
Filtration parameter module in final filter 113 includes final stage parameter setting submodule and final stage parameter storage submodule
Block (is not shown) in figure.Wherein, final stage parameter setting submodule, for the 6th byte of target multicast address to be divided into
Bit code, and corresponding position enabler flags are set as final stage filtration parameter to bit code.Final stage parameter sub-module stored, for storing
Position enabler flags.
Further, the primary filter algoritic module in primary filter 111 includes primary extraction submodule and primary
Filter submodule (is not shown) in figure.Wherein, primary extraction submodule, first four for primary extraction current multicast address
Byte is as current type code.Primary filter submodule, for the current type code that is extracted according to primary extraction submodule by
First kind enabler flags corresponding to being searched in einer Primargrosse sub-module stored, and according to the presence shape of first kind enabler flags
State and current enabled state carry out the primary filter of current multicast message.
Herein, it is necessary to illustrate, as a specific embodiment of the multicast message filter of the present invention, primary filter
Submodule specifically includes primary judging unit, primary transfer unit and primary discarding unit (being not shown in figure).Wherein, it is primary
Judging unit, for judging that first kind enabler flags whether there is, and the current enabled state of first kind enabler flags
Whether it is enabled.Primary transfer unit, for judging that first kind enabler flags are present and current when primary judging unit
When enabled state is enables, retain current multicast message and the corresponding next stage transmission for carrying out current multicast message.Primary is lost
Unit is abandoned, for judging that first kind enabler flags are not present or current enabled state is to be not enabled on when primary judging unit
When, abandon current multicast message.
Accordingly, the secondary filter algoritic module in secondary filter 112 includes secondary extracting sub-module and secondary filter
Submodule (is not shown) in figure.Wherein, secondary extracting sub-module, for secondary the 5th word extracted in current multicast address
Section is as current group code.Secondary filter submodule, for being joined according to the current group of code that secondary extracting sub-module extracts by secondary
First group of enabler flags corresponding to being searched in number sub-module storeds, and make according to the existences of first group of enabler flags and currently
Energy state carries out the secondary filter of current multicast message.
Further, the final stage filter algorithm module in final filter 113 includes final stage extracting sub-module and final stage mistake
Filter module (is not shown) in figure.Wherein, final stage extracting sub-module, the 6th in current multicast address is extracted for final stage
Byte is as current bit code.Final stage filter submodule, for the current bit code that is extracted according to final stage extracting sub-module by final stage
First enabler flags corresponding to being searched in sub-module stored, and according to the existence of first enabler flags and current enabled
State carries out the final stage filtering of current multicast message.
Wherein, it is noted that each technical characteristic of embodiment described above can be combined arbitrarily, to make to retouch
State succinctly, combination not all possible to each technical characteristic in above-described embodiment is all described, as long as however, these skills
Contradiction is not present in the combination of art feature, is all considered to be the scope of this specification record.
In addition, referring to Fig. 3, based on any of the above-described kind of multicast message filter, present invention also offers a kind of multicast report
Literary receiving device 100.As a specific embodiment of the multicast message receiving device 100 of the present invention, it includes network interface 120, connect
Mouth 130 and any of the above-described kind of multicast message filter 110.Wherein, multicast message filter 110 be connected to network interface 120 with
Between interface 130.Interface 130, for obtaining the target multicast message subscribed to by outer CPU, the mesh ordered by outer CPU is set
The multicast address of multicast message is marked, and the multicast address of setting is transmitted to multicast message filter 110.Multicast message filters
Device 110, for corresponding filtration parameter to be set dynamically step by step according to the multicast address received.Wherein, herein, it should be pointed out that
, every grade setting filtration parameter section different from multicast address it is digital corresponding.Network interface 120, for obtaining current group
Text is reported, and current multicast message is transmitted to multicast message filter.Multicast message filter 110, is additionally operable to basis
Filtration parameter is filtered step by step to current multicast message.Interface 130, it is additionally operable to connect external equipment, is passed through by external equipment
The interface 130 receives the multicast message after multicast message filter filters step by step.
Detailed process during multicast message reception is carried out for clearer explanation multicast message receiving device of the invention, with
Under be described in more detail so that GOOSE message receives as an example.
Specifically, as a kind of multicast message receiving device 100 for being used to receive GOOSE message, the equipment is by network interface
120th, 112, two primary filter 111, secondary filter final filters (are respectively the first final filter 113a and second
Final filter 113b) and interface 130 is (such as：GOOSE interface units) composition.
Wherein, network interface 120 is the receiving interface of external data, is arranged to work in promiscuous mode, can receive and be connect up to this
The all-network data of mouth.Interface 130 is that the equipment subscribes to multicast interface, and the external interactive interface of GOOSE message.
Primary filter 111, secondary filter 112 and final stage filter set step by step, the multicast filtering as the equipment
Realization body, its workflow are：
Step 1, primary filter 111 extracts preceding four bytes in current multicast address as current type code, and root
According to preceding four bytes (that is, current type code) extracted by primary filter 111 einer Primargrosse sub-module stored (in figure not
Show) in search corresponding first kind enabler flags.Wherein, multiple types are stored with einer Primargrosse sub-module stored to enable
Mark.If the current enabled state that first kind enabler flags and first kind enabler flags be present is to have enabled, then it is assumed that when
Preceding multicast message is the multicast message for allowing to pass through, therefore the multicast message that now would allow through passes to time of corresponding types
Level filter 112.If it is to be not enabled in the absence of the current enabled state of first kind enabler flags or first kind enabler flags
State, then it is assumed that current multicast message is the multicast message for not allowing to pass through, therefore is carried out discard processing.
Herein, it is necessary to which explanation, the specific implementation of primary filter 111 are：Use 1 expression GOOSE message
It is enabled, when the position is 0, all GOOSE messages are shielded, represent to make GOOSE message pass to secondary filter for 1.
Step 2, the 5th byte that secondary filter 112 is extracted in current multicast address are used as and currently organize code, and according to
The 5th byte (that is, currently organizing code) extracted (is not shown by the secondary parameter sub-module stored of the secondary filter 112 in figure
Go out) in search corresponding first group of enabler flags.Wherein, multiple groups of enabler flags are stored with secondary parameter sub-module stored.
If it is to have enabled in the presence of the current enabled state of first group of enabler flags and first group of enabler flags, then it is assumed that current multicast message
To allow the multicast message passed through, therefore the multicast message that now would allow through passes to the final filter 113 of corresponding group
(the first final filter 113a or the second final filter 113b).If in the absence of first group of enabler flags or first group of enabled mark
The current enabled state of will is to be not enabled on state, then it is assumed that current multicast message is the multicast message for not allowing to pass through, therefore will
It carries out discard processing.
Herein, it is necessary to which explanation, the specific implementation of secondary filter 112 are：Enabled using 2 expression groups,
Bit0 expressions group 1 is enabled, and bit1 expressions group 2 is enabled.If bit0 is 0, the 5th byte for shielding all multicast address is 0
GOOSE message, when bit0 is 1, the 5th byte for making multicast address is that 0 message is transmitted to the first final filter 113a of group 1；
If bit1 is 0, the 5th byte for shielding all multicast address is 1 message, when bit1 is 1, makes the 5th byte of multicast address
The second final filter 113b of group 2 is passed to for 1 message.
Step 3, corresponding first final filter 113a (or second final filter 113b) extract current multicast address
In the 6th byte as current bit code, and according to the 6th byte (that is, current bit code) extracted by first final stage
Searched in filter 113a (or second final filter 113b) final stage parameter sub-module stored (being to show in figure) corresponding
First enabler flags.Wherein, multiple enabler flags are stored with final stage parameter sub-module stored.It is if enabled in the presence of first
The current enabled state of mark and first enabler flags is to have enabled, then it is assumed that current multicast message is the multicast for allowing to pass through
Message, therefore the multicast message that now would allow through passes to interface 130.If first enabler flags or first is not present
The current enabled state of enabler flags is to be not enabled on state, then it is assumed that current multicast message is the multicast message for not allowing to pass through,
Therefore discard processing is carried out.
Herein, it is necessary to explanation, the first final filter 113a and the second final filter 113b specific implementation side
Formula is：Represent that position enables using 256,0 represents to forbid, and 1 represents enabled.If the 6th byte of message is that (n is 0 to 255 to n
Value), then judge (n+1)th, if 0, then shield the message, the message is passed into interface 130 if 1.
Interface 130, from external reception multicast address, the parameter setting for the filter of each rank.If receive
Before multicast address four bytes be 01-0C-CD-01 (i.e. GOOSE types), the 5th byte be 0 or 1, then primary filter is set
The enable bit of device 111 is 1, and the bit0 or bit1 for setting secondary filter 112 are 1, and according to the 6th byte of multicast address
Value n settings group 1 or organize 2 the first final filter 113a or the second final filter 113b n+1 positions be 1, and return into
Work(；Otherwise, failure is directly returned.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (13)
1. a kind of multicast message filter method, it is characterised in that comprise the following steps：
Receive current multicast message；
By the number for extracting correspondent section in the current multicast address of the current multicast message step by step；
The first filtering ginseng according to corresponding to being determined in the digital filtration parameter as the appropriate level pre-set extracted
Count, and carry out the filtering of the current multicast message step by step according to first filtration parameter of determination.
2. according to the method for claim 1, it is characterised in that the filtration parameter of appropriate level is according to the target of subscription
The target multicast address of multicast message is set dynamically step by step, and the filtration parameter of each rank and the target multicast address
Middle different sections it is digital corresponding.
3. according to the method for claim 2, it is characterised in that the rank of the filtration parameter include primary filter parameter,
Secondary filter parameter and final stage filtration parameter；And
The primary filter parameter is type enabler flags, and the secondary filter parameter is group enabler flags, the final stage filtering
Parameter is position enabler flags；
The filtration parameter of appropriate level is set dynamically step by step according to the target multicast address of the target multicast message of subscription, including such as
Lower step：
Preceding four bytes of the target multicast address are divided into target type code, and the target type code set corresponding
The type enabler flags as the primary filter parameter；
5th byte of the target multicast address is divided into target group code, and corresponding institute is set to the target group code
Group enabler flags are stated as the secondary filter parameter；
6th byte of the target multicast address is divided into target bit code, and corresponding institute is set to the target bit code
Rheme enabler flags are as the final stage filtration parameter.
4. according to the method for claim 3, it is characterised in that the current multicast address by the current multicast message
In when extracting the number of correspondent section step by step, including the extraction current multicast address preceding four bytes as current type code
The step of；
Digital first mistake as corresponding to being determined in the filtration parameter of the appropriate level pre-set that the basis extracts
When filtering parameter, and the filtering of the current multicast message carried out step by step according to first filtration parameter of determination, including：According to
First kind enabler flags corresponding to the current type code lookup, and according to the existence of the first kind enabler flags
And current enabled state carries out the step of primary filter of the current multicast message.
5. according to the method for claim 4, it is characterised in that the presence shape according to the first kind enabler flags
State and current enabled state carry out the primary filter of the current multicast message, comprise the following steps：
Judge that the first kind enabler flags whether there is, and the current enabled state of the first kind enabler flags is
No is to have enabled；
When judging that the first kind enabler flags are present and current enabled state is enables, retain the current multicast
The current multicast message is simultaneously transferred to next stage corresponding with the first kind enabler flags by message；
When judging that the first kind enabler flags are not present or current enabled state is is not enabled on, described current group is abandoned
Report text.
6. the method according to claim 3 or 4, it is characterised in that the current multicast by the current multicast message
When extracting the number of correspondent section in address step by step, including the 5th byte of the current multicast address is extracted as current group
The step of code；
Digital first mistake as corresponding to being determined in the filtration parameter of the appropriate level pre-set that the basis extracts
When filtering parameter, and the filtering of the current multicast message carried out step by step according to first filtration parameter of determination, including：According to
The current group code search corresponding to first group of enabler flags, and according to the existence of first group of enabler flags and current
Enabled state carries out the step of secondary filter of the current multicast message；
When extracting the number of correspondent section step by step in the current multicast address by the current multicast message, in addition to extraction
The step of 6th byte of the current multicast address is as current bit code；
Digital first mistake as corresponding to being determined in the filtration parameter of the appropriate level pre-set that the basis extracts
When filtering parameter, and the filtering of the current multicast message carried out step by step according to first filtration parameter of determination, including：According to
The current bit code search corresponding to first enabler flags, and according to the existence of first enabler flags and current
Enabled state carries out the step of final stage filtering of the current multicast message.
A kind of 7. multicast message filter, it is characterised in that including the multiple filters set step by step, and the institute of each rank
Stating filter includes the filtration parameter module and filter algorithm module of appropriate level；
The filter algorithm module of each rank, for receiving current multicast message, and working as by the current multicast message
The number of correspondent section corresponding with its rank is extracted in preceding multicast address；
The filter algorithm module of each rank, it is additionally operable to according to the digital filtering by appropriate level extracted
First filtration parameter corresponding to being determined in the filtration parameter that parameter module is pre-set, and joined according to first filtering of determination
Number carries out the filtering of the current multicast message of appropriate level.
8. device according to claim 7, it is characterised in that the filtration parameter module of each rank, for basis
The filtration parameter of the target multicast address dynamic setting appropriate level of the target multicast message of subscription；And each rank
The filtration parameter set by the filtration parameter module from the target multicast address different sections it is digital corresponding.
9. device according to claim 8, it is characterised in that the rank of the filter is three-level, the mistake of each rank
Filter is respectively：Primary filter, secondary filter and final filter；
Wherein, the filtration parameter that the primary filter is set is type enabler flags, the filtering that the secondary filter is set
Parameter is group enabler flags, and the filtration parameter that the final filter is set is position enabler flags；
Filtration parameter module in the primary filter includes einer Primargrosse and sets submodule and einer Primargrosse sub-module stored；
The einer Primargrosse sets submodule, for preceding four bytes of the target multicast address to be divided into target type
Code, and corresponding type enabler flags are set as primary filter parameter to the target type code；
The einer Primargrosse sub-module stored, for storing the type enabler flags；
Filtration parameter module in the secondary filter includes secondary parameter and sets submodule and secondary parameter sub-module stored；
The secondary parameter sets submodule, for the 5th byte of the target multicast address to be divided into a group code, and it is right
Described group of code sets corresponding group enabler flags as secondary filter parameter；
The secondary parameter sub-module stored, for storing described group of enabler flags；
Filtration parameter module in the final filter includes final stage parameter setting submodule and final stage parameter sub-module stored；
The final stage parameter setting submodule, for the 6th byte of the target multicast address to be divided into bit code, and it is right
The bit code sets corresponding position enabler flags as final stage filtration parameter；
The final stage parameter sub-module stored, the rheme enabler flags for storing.
10. device according to claim 9, it is characterised in that the primary filter algoritic module in the primary filter
Including primary extraction submodule and primary filter submodule；
The primary extraction submodule, preceding four bytes for current multicast address described in primary extraction are as current type
Code；
The primary filter submodule, for the current type code that is extracted according to the primary extraction submodule by described
First kind enabler flags corresponding to being searched in einer Primargrosse sub-module stored, and depositing according to the first kind enabler flags
The primary filter of the current multicast message is carried out in state and current enabled state.
11. device according to claim 10, it is characterised in that it is single that the primary filter submodule includes primary judgement
First, primary transfer unit and primary discarding unit；
The primary judging unit, for judging that the first kind enabler flags whether there is, and the first kind makes
Whether the current enabled state that can indicate is enabled；
The primary transfer unit, for when the primary judging unit judges the first kind enabler flags presence and works as
When preceding enabled state is enables, retain the current multicast message and the corresponding next stage for carrying out the current multicast message passes
Pass；
The primary discarding unit, for when the primary judging unit judge the first kind enabler flags be not present or
Current enabled state is when being not enabled on, to abandon the current multicast message.
12. the device according to claim 9 or 10, it is characterised in that the secondary filter algorithm in the secondary filter
Module includes secondary extracting sub-module and secondary filter submodule；
The secondary extracting sub-module, for secondary the 5th byte extracted in the current multicast address as current group
Code；
The secondary filter submodule, for the current group code that is extracted according to the secondary extracting sub-module by described time
First group of enabler flags corresponding to being searched in level parameter sub-module stored, and according to the existence of first group of enabler flags
And current enabled state carries out the secondary filter of the current multicast message；
Final stage filter algorithm module in the final filter includes final stage extracting sub-module and final stage filter submodule；
The final stage extracting sub-module, for the 6th byte in the final stage extraction current multicast address as present bit
Code；
The final stage filter submodule, for the current bit code that is extracted according to the final stage extracting sub-module by the end
First enabler flags corresponding to being searched in level sub-module stored, and according to the existences of first enabler flags and work as
Preceding enabled state carries out the final stage filtering of the current multicast message.
13. a kind of multicast message receiving device, it is characterised in that including described in network interface, interface and any one of claim 7 to 12
Multicast message filter；
The multicast message filter is connected between the network interface and the interface；
The interface, transmitted for setting the multicast address of ordered target multicast message, and by the multicast address to institute
State multicast message filter；
The multicast message filter, for corresponding filtering ginseng to be set dynamically step by step according to the multicast address received
Number；Wherein, the filtration parameter section different from the multicast address of every grade of setting is digital corresponding；
The network interface, transmitted for obtaining the current multicast message, and by the current multicast message to the multicast message
Filter；
The multicast message filter, it is additionally operable to carry out mistake step by step to the current multicast message according to the filtration parameter
Filter；
The interface, it is additionally operable to connect external equipment, the multicast message mistake as described in the external equipment by the interface
Filter the multicast message after device filters step by step.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001019029A1 (en) * | 1999-09-09 | 2001-03-15 | Nokia Corporation | In controlled multicast |
| CN102142009A (en) * | 2010-12-09 | 2011-08-03 | 华为技术有限公司 | Method and device for matching regular expressions |
| CN103716239A (en) * | 2013-12-24 | 2014-04-09 | 南京磐能电力科技股份有限公司 | Network storm inhibition method in process layer of intelligent transformer station |
| CN104753781A (en) * | 2015-03-19 | 2015-07-01 | 西电通用电气自动化有限公司 | Intelligent substation process level device network windstorm restraining method |
| CN105264862A (en) * | 2013-11-18 | 2016-01-20 | 思科技术公司 | Filtering at lower network protocol layers |
| CN105635067A (en) * | 2014-11-04 | 2016-06-01 | 华为技术有限公司 | Packet transmission method and apparatus |
-
2016
- 2016-08-11 CN CN201610657252.0A patent/CN107733803B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001019029A1 (en) * | 1999-09-09 | 2001-03-15 | Nokia Corporation | In controlled multicast |
| CN102142009A (en) * | 2010-12-09 | 2011-08-03 | 华为技术有限公司 | Method and device for matching regular expressions |
| CN105264862A (en) * | 2013-11-18 | 2016-01-20 | 思科技术公司 | Filtering at lower network protocol layers |
| CN103716239A (en) * | 2013-12-24 | 2014-04-09 | 南京磐能电力科技股份有限公司 | Network storm inhibition method in process layer of intelligent transformer station |
| CN105635067A (en) * | 2014-11-04 | 2016-06-01 | 华为技术有限公司 | Packet transmission method and apparatus |
| CN104753781A (en) * | 2015-03-19 | 2015-07-01 | 西电通用电气自动化有限公司 | Intelligent substation process level device network windstorm restraining method |
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