CN110505300A - A kind of Novel chain type Proxy Method that IP network is mixed with name data network - Google Patents
A kind of Novel chain type Proxy Method that IP network is mixed with name data network Download PDFInfo
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- CN110505300A CN110505300A CN201910787610.3A CN201910787610A CN110505300A CN 110505300 A CN110505300 A CN 110505300A CN 201910787610 A CN201910787610 A CN 201910787610A CN 110505300 A CN110505300 A CN 110505300A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/562—Brokering proxy services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
Abstract
The invention belongs to computer network field, the Novel chain type Proxy Methods mixed more particularly, to a kind of IP network with name data network, comprising: step S1: establish first network；The first network is name data network；Step S2: first network realizes chain type agency；Step S3: establishing the second network, and first network and the second network carry out data interaction；Second network is name data network or TCP/IP network, if the second network is TCP/IP network, has middleware between first network and the second network, for converting to data packet.Setting up for middleware of the present invention makes TCP/IP network and name data network can be carried out information exchange, realizes and applies to name data network among chain type agency.
Description
Technical field
The invention belongs to computer network fields, mix more particularly, to a kind of IP network with name data network
Novel chain type Proxy Method.
Background technique
As the application of Internet is more and more wider, the safety problem of Internet respective services becomes more and more prominent,
The more and more users personal privacy information of exposure, network environment of a safety during online become increasingly important.
As bridge --- the proxy server of connection Internet and Intranet, it is mainly used for forwarding the network access of user to ask
It asks, controls the behavior of user, decision is carried out to the request received, user's request is filtered according to filtering rule.Agency
Server acts on behalf of IP address, can be pretended the safety so as to improve network to the real IP address of user.It is high
The agency of quality has very big benefit to network security, and computer is obtained to be invaded and harassed against virus, and privacy information is able to be protected.
Chain type agency, i.e., the multiple agent process of different proxy servers.In single agency service, proxy server energy
The IP address of client and the IP address that is accessing enough are grasped, and can be seen between the website that is accessing with plaintext shape
All flows of formula exchange.Once proxy server is inherently insincere by hacker attack or agency service provider
, the privacy that just will use family leaks, and causes the loss for being difficult to retrieve.Using chain type, agency can prevent problems, because
It for data packet is repeatedly acted on behalf of by a series of different proxy servers, avoids user information and concentrate on a certain agency
In server, the risk of user information leakage is reduced, privacy of user is protected.In addition, chain type agency also can be well solved
The problem of cannot being adapted between network hardware equipment.Under complex network situation, especially the access of long term distance, data packet are past
It is past to need by multiple routers, and the router of different vendor is usually that cannot be connected directly, at this time chain type agency is logical
Forwarding of the different proxy servers to data packet is crossed, can successfully solve the problems, such as be adapted between multiple equipment.But with
Increasing for number is acted on behalf of, the path of agency is progressively longer, and chain type agency starts the problem for having occurred in many performances, such as responds
Overlong time, proxy path unmanageable etc..Existing some optimization methods are all that mode carries out end to end around IP network, are had
It is improved from unpacking/package method a bit, some are optimized in terms of proxy path, however these methods are not all from root
It is solved the problems, such as on this.
It names data network (Named Data Network, NDN), referred to as Future network architectures.It is concerned about no longer
It is the source of data, but the content of data, it does not need source and destination binding, but is transmitted and divided according to content
Hair, basic element are the data contents with name, and being different from IP network framework is with the communication at IP address identification both ends.
Name data network can effectively solve the problems, such as that chain type proxy response overlong time, path are complicated, but fall on a large scale in the short time
Ground deployment, and the idea of IP network framework and unrealistic is replaced completely.Therefore need at present it is a kind of can will name data network fortune
For the method among chain type agency.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of Novel chain type agency that IP network is mixed with name data network
Method, this method can apply to name data network among chain type agency.
The technical solution adopted by the present invention is that:
A kind of Novel chain type Proxy Method that IP network is mixed with name data network, comprising:
Step S1: first network is established；
The first network is name data network；
Step S2: first network realizes chain type agency；
Step S3: establishing the second network, and first network and the second network carry out data interaction；
Second network is name data network or TCP/IP network, if the second network is TCP/IP network, first
There is middleware, for converting to data packet between network and the second network.
Firstly, establishing two networks, because chain type agent capabilities can be improved in name data network, one of them must be
Name data network.Then, realization chain type agency in data network is being named, by naming the characteristic of data network to make chain type generation
Reason is optimized.Name data network characteristic is broadly divided into two o'clock: (1) naming data network without using IP agreement, with TCP/IP
Network is different, and name data network does not use IP agreement, therefore the chain type agency of data network is named not need as TCP/IP
Network chain type agency equally data packet is unpacked, the operation of package, can be directly forwarded by proxy server, significantly
Shorten the response time of chain type agency；(2) it is transmitted and is distributed according to content, what name data network was concerned about is no longer several
According to source, but the content of data is different from the TCP/IP network architecture with the communication mode at IP address identification both ends, name
Sending and receiving without source and destination binding for data network data, after first time agency service, names data
Router in network can also cache Data packet, will when having the Interest packet of identical name to reach router later
Data packet is directly returned, router is not needed and further forwards, the path for acting on behalf of chain type is effectively optimized, and is further shortened
Response time.Finally, making the name data network for realizing chain type agency and the second network connection, if the second network is name data
Network, two networks can be directly attached, and otherwise if TCP/IP network, then need to establish a middleware to two networks
Data mutually converted.In the present solution, the second network is TCP/IP network, the setting up of middleware make TCP/IP network with
Name data network can be carried out information exchange, realizes and applies to name data network among chain type agency.
Further, the step S2 includes:
The end step S2.1:client issues Interest packet；
Step S2.2: transmitting Interest packet in name data network, if reaching router, executes step S2.3, if
Proxy server is reached, step S2.10 is executed, if reaching destination server, executes step S2.11；
The caching of step S2.3:Interest packet and router carries out prefix matching, names identical Data packet if it exists,
Step S2.6 is executed, it is no to then follow the steps S2.4；
Step S2.4: it checks in interest table undetermined and names identical list item with the presence or absence of with Interest packet, hold if it exists
Row step S2.7, it is no to then follow the steps S2.5；
Step S2.5: forwarding Interest packet according to forwarding information table, and establish corresponding list item in interest table undetermined,
Execute step S2.2；
Step S2.6: returning to Data packet, executes step S2.12；
Step S2.7: interface corresponding with Interest packet is added in the list item of interest table undetermined, and is no longer forwarded
Interest packet waits the arrival of Data packet, executes step S2.8；
Whether step S2.8: regular check Data packet reaches router, executes step S2.9 if reaching, no to then follow the steps
S2.8；
Step S2.9:Data packet reaches router, deletes corresponding list item in interest table undetermined, and Data packet is delayed
It deposits, executes step S2.12；
Step S2.10:Interest packet/Data packet reaches proxy server, inquiry forwarding table see prefix matching whether at
Function executes step S2.2 if succeeding and being Interest packet；If succeeding and being Data packet, step S2.12 is executed；If unsuccessful
It is then discarded into the Interest packet/Data packet come, without agency, terminates process；
Step S2.11:Interest packet reach destination server, destination server carry out to the abstract part in name into
Row checks, sees whether meet integrality, returns to Data packet if meeting, the Interest packet of arrival is otherwise abandoned, without generation
Reason terminates process；
Step S2.12: Data packet is transmitted in name data network；If reaching router, step S2.8 is executed；If reaching
Proxy server executes step S2.10；If reaching client, step S2.13 is executed；
Step S2.13:Data packet returns to client, and agency terminates.
Further, the middleware includes: physical layer, link layer, conversion layer.
Specifically, since two networks can not be directly connected to, to realize information exchange between the two, middleware is needed
Data are converted, conversion process is process of the data packet by middleware, and data packet needs to first pass through physical layer, link
Layer, conversion layer are unpacked, then Reseal into the packet format of corresponding network.
Further, the middleware, which convert to the data packet of first network and the second network, includes:
IP data packet is converted to the Interest packet of name data network；
The Data packet of name data network is converted to IP data packet.
Further, the IP data packet is converted to the process of Interest packet of name data network and includes:
Step S3.11:IP data packet reaches middleware, by physical layer, is first unpacked by link layer and enters conversion layer, conversion
Layer preserves the source address information in network layer packet header；
Step S3.12: carrying out the analysis of application to the request packet, then will be in request header if dynamic resource
Userid field and uri are combined the name as Interest packet, if static resource, then directly using uri as
The name of Interest packet；
Step S3.13: searching mapping table, and corresponding list item if it exists executes step S3.14, otherwise by the name with
Source address information is established mapping relations and is saved, and step S3.14 is executed；
Step S3.14: it is obtained in name data network using the message part that the name Reseals request packet
Interest packet.
Specifically, data form the process of IP data packet are as follows: firstly, source host sends the data to application layer, application layer
Message transmissions are formed to transport layer plus necessary control information to data, and then, the data received are added this layer by transport layer
Control information form message segment, be transferred to network layer, network layer forms datagram plus the control information of this layer, is transferred to chain
Road floor.Datagram is assembled framing by link layer, and physical layer is transferred in the form of bit stream, finally, the IP data packet formed
Physical layer is left to be transmitted in an ip network.
IP data packet is converted into the process of Interest packet are as follows: IP data packet by IP network transmit reach middleware after,
It first passes around physical layer and enters link layer, then unpacked again by link layer and enter conversion layer, conversion layer wraps packet networks layer
The source address information (IP address and port numbers) of head (Hn) saves, and the analysis for then carrying out application (determines the money of data packet
Source Type), if the resource of request is static resource (such as Today's news etc. resource) unrelated with user identity, directly by http
Name of the uri as Interest packet in request；When Interest packet requested resource be dynamic resource (such as account letter
The resources relevant to user identity such as breath), then the Userid and uri group in http request head is combined into<userid>:<uri>'s
Name form names Interest packet, finally names to establish to map with source address information before by obtained Interest packet and close
It is and is stored in mapping table, and Interest packet is generated according to the value that resource property sets each field, generation
Interest packet, which enters in name data network, to be transmitted.
Further, the Data packet of the name data network is converted to the process of IP data packet and includes:
Step S3.21: naming the Data packet of data network to reach middleware, by physical layer, first by link layer unpack into
Enter conversion layer, conversion layer obtains the name of the response bag；
Step S3.22: middleware inquires mapping table according to name, obtains source address information；
Step S3.23: response bag is packaged again using source address information to obtain IP data packet, while deleting mapping
Corresponding list item in relation table.
Specifically, destination host is obeyed the order after a data network receives Interest packet, needs to return data to source host,
The process of data formation Data packet are as follows: firstly, destination host sends data to application layer, application layer is message biography data mart modeling
To transport layer and network layer, transport layer and network layer are packaged the message of application layer by the way of name, the number of formation
It is transferred to link layer according to report, datagram is assembled framing by link layer, is transferred to physical layer, is eventually formed Data packet and is left physical layer
It is transmitted in name data network.
Data packet is converted into the process of IP data packet are as follows: when the Data packet of return reaches middleware by name data network
When, the mapping table established before needing to inquire obtains the relevant information of source address, solves to the Data packet of name data network
The encapsulation that the source address information for recycling inquiry to obtain after packet carries out transport layer and network layer to the message part of application layer obtains
IP data packet, while the corresponding list item in mapping table is deleted, it is transmitted using entering in IP network after link layer packaging, most
After reach source host, so far IP network and name data network an interactive process terminate.
Further, the ApplicationParameters field of the Interest packet is the message portion of IP data packet
Point.
Further, Interest packet CanbePrefix field if it exists, then Interest packet is named as Data
The prefix of name is wrapped, otherwise the name of Interest packet is identical as the name of Data packet.
CanbePrefix field is nonessential field, if is existed mainly by the desired data content of Interest packet
It determines, when (such as real-time news) that desired data content is desirably accurate, real-time is high, so that it may be arranged, if only
It is desirable to inquire the not high content of some relevant, requirement of real-time (such as development of computer history etc.), then can be not provided with.
Further, Interest packet MustbeFresh field if it exists, then router can be read in Interest packet
The Data packet of middle storage, otherwise can not read.
MustbeFresh field is nonessential field, if is existed mainly by the desired data content of Interest packet
It determines, when (such as real-time news) that desired data content is desirably accurate, real-time is high, so that it may be arranged, if only
It is desirable to inquire the not high content of some relevant, requirement of real-time (such as development of computer history etc.), then can be not provided with.
Further, the data packet of the name data network uses TLV said shank.
Compared with prior art, the invention has the benefit that
(1) setting up for middleware makes TCP/IP network and name data network can be carried out information exchange.
(2) it realizes and applies to name data network among chain type agency, the response time for acting on behalf of chain type greatly contracts
It is short, optimize the performance of chain type agency.
Detailed description of the invention
Fig. 1 is that the chain type of the invention based on name data network acts on behalf of flow chart；
Fig. 2 interacts schematic diagram with IP network, name data network for middleware of the invention；
Fig. 3 is that IP data packet of the invention is converted to Interest packet flow chart；
Fig. 4 is that Data packet of the invention is converted to IP data packet flow chart；
Fig. 5 is Interest packet field list of the invention；
Fig. 6 is Data packet field list of the invention.
Specific embodiment
Attached drawing of the present invention only for illustration, is not considered as limiting the invention.It is following in order to more preferably illustrate
Embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；For art technology
For personnel, the omitting of some known structures and their instructions in the attached drawings are understandable.
Embodiment
The present embodiment provides the Novel chain type Proxy Methods that a kind of IP network is mixed with name data network, comprising:
Step S1: first network is established；
The first network is name data network；
Step S2: first network realizes chain type agency；
Step S3: establishing the second network, and first network and the second network carry out data interaction；
Second network is name data network or TCP/IP network, if the second network is TCP/IP network, first
There is middleware, for converting to data packet between network and the second network.
Firstly, establishing two networks, because chain type agent capabilities can be improved in name data network, one of them must be
Name data network.Then, realization chain type agency in data network is being named, by naming the characteristic of data network to make chain type generation
Reason is optimized.Name data network characteristic is broadly divided into two o'clock: (1) naming data network without using IP agreement, with TCP/IP
Network is different, and name data network does not use IP agreement, therefore the chain type agency of data network is named not need as TCP/IP
Network chain type agency equally data packet is unpacked, the operation of package, can be directly forwarded by proxy server, significantly
Shorten the response time of chain type agency；(2) it is transmitted and is distributed according to content, what name data network was concerned about is no longer several
According to source, but the content of data is different from the TCP/IP network architecture with the communication mode at IP address identification both ends, name
Sending and receiving without source and destination binding for data network data, after first time agency service, names data
Router in network can also cache Data packet, will when having the Interest packet of identical name to reach router later
Data packet is directly returned, router is not needed and further forwards, the path for acting on behalf of chain type is effectively optimized, and is further shortened
Response time.Finally, making the name data network for realizing chain type agency and the second network connection, if the second network is name data
Network, two networks can be directly attached, and otherwise if TCP/IP network, then need to establish a middleware to two networks
Data mutually converted.In embodiment, the second network is TCP/IP network, the setting up of middleware make TCP/IP network with
Name data network can be carried out information exchange, realizes and applies to name data network among chain type agency.
Fig. 1 is that the chain type of the invention based on name data network acts on behalf of flow chart, as shown, the step S2 packet
It includes:
The end step S2.1:client issues Interest packet；
Step S2.2: transmitting Interest packet in name data network, if reaching router, executes step S2.3, if
Proxy server is reached, step S2.10 is executed, if reaching destination server, executes step S2.11；
The caching of step S2.3:Interest packet and router carries out prefix matching, names identical Data packet if it exists,
Step S2.6 is executed, it is no to then follow the steps S2.4；
Step S2.4: it checks in interest table undetermined and names identical list item with the presence or absence of with Interest packet, hold if it exists
Row step S2.7, it is no to then follow the steps S2.5；
Step S2.5: forwarding Interest packet according to forwarding information table, and establish corresponding list item in interest table undetermined,
Execute step S2.2；
Step S2.6: returning to Data packet, executes step S2.12；
Step S2.7: interface corresponding with Interest packet is added in the list item of interest table undetermined, and is no longer forwarded
Interest packet waits the arrival of Data packet, executes step S2.8；
Whether step S2.8: regular check Data packet reaches router, executes step S2.9 if reaching, no to then follow the steps
S2.8；
Step S2.9:Data packet reaches router, deletes corresponding list item in interest table undetermined, and Data packet is delayed
It deposits, executes step S2.12；
Step S2.10:Interest packet/Data packet reaches proxy server, inquiry forwarding table see prefix matching whether at
Function executes step S2.2 if succeeding and being Interest packet；If succeeding and being Data packet, step S2.12 is executed；If unsuccessful
It is then discarded into the Interest packet/Data packet come, without agency, terminates process；
Step S2.11:Interest packet reach destination server, destination server carry out to the abstract part in name into
Row checks, sees whether meet integrality, returns to Data packet if meeting, the Interest packet of arrival is otherwise abandoned, without generation
Reason terminates process；
Step S2.12: Data packet is transmitted in name data network；If reaching router, step S2.8 is executed；If reaching
Proxy server executes step S2.10；If reaching client, step S2.13 is executed；
Step S2.13:Data packet returns to client, and agency terminates.
Further, the middleware includes: physical layer, link layer, conversion layer.
Specifically, since two networks can not be directly connected to, to realize information exchange between the two, middleware is needed
Data are converted, conversion process is process of the data packet by middleware, and data packet needs to first pass through physical layer, link
Layer, conversion layer are unpacked, then Reseal into the packet format of corresponding network.
Fig. 2 interacts schematic diagram with IP network, name data network for middleware of the invention, as shown, the centre
Part carries out conversion to the data packet of first network and the second network
IP data packet is converted to the Interest packet of name data network；
The Data packet of name data network is converted to IP data packet.
Fig. 3 is that IP data packet of the invention is converted to Interest packet flow chart, as shown, the IP data packet is converted
The process of Interest packet to name data network includes:
Step S3.11:IP data packet reaches middleware, by physical layer, is first unpacked by link layer and enters conversion layer, conversion
Layer preserves the source address information in network layer packet header；
Step S3.12: carrying out the analysis of application to the request packet, then will be in request header if dynamic resource
Userid field and uri are combined the name as Interest packet, if static resource, then directly using uri as
The name of Interest packet；
Step S3.13: searching mapping table, and corresponding list item if it exists executes step S3.14, otherwise by the name with
Source address information is established mapping relations and is saved, and step S3.14 is executed；
Step S3.14: it is obtained in name data network using the message part that the name Reseals request packet
Interest packet.
Specifically, data form the process of IP data packet are as follows: firstly, source host sends the data to application layer, application layer
Message transmissions are formed to transport layer plus necessary control information to data, and then, the data received are added this layer by transport layer
Control information form message segment, be transferred to network layer, network layer forms datagram plus the control information of this layer, is transferred to chain
Road floor.Datagram is assembled framing by link layer, and physical layer is transferred in the form of bit stream, finally, the IP data packet formed
Physical layer is left to be transmitted in an ip network.
IP data packet is converted into the process of Interest packet are as follows: IP data packet by IP network transmit reach middleware after,
It first passes around physical layer and enters link layer, then unpacked again by link layer and enter conversion layer, conversion layer wraps packet networks layer
The source address information (IP address and port numbers) of head (Hn) saves, and the analysis for then carrying out application (determines the money of data packet
Source Type), if the resource of request is static resource (such as Today's news etc. resource) unrelated with user identity, directly by http
Name of the uri as Interest packet in request；When Interest packet requested resource be dynamic resource (such as account letter
The resources relevant to user identity such as breath), then the Userid and uri group in http request head is combined into<userid>:<uri>'s
Name form names Interest packet, finally names to establish to map with source address information before by obtained Interest packet and close
It is and is stored in mapping table, and Interest packet is generated according to the value that resource property sets each field, generation
Interest packet, which enters in name data network, to be transmitted.
Fig. 4 is converted to IP data packet flow chart for Data packet of the invention, as shown, the name data network
The process that Data packet is converted to IP data packet includes:
Step S3.21: naming the Data packet of data network to reach middleware, by physical layer, first by link layer unpack into
Enter conversion layer, conversion layer obtains the name of the response bag；
Step S3.22: middleware inquires mapping table according to name, obtains source address information；
Step S3.23: response bag is packaged again using source address information to obtain IP data packet, while deleting mapping
Corresponding list item in relation table.
Specifically, destination host is obeyed the order after a data network receives Interest packet, needs to return data to source host,
The process of data formation Data packet are as follows: firstly, destination host sends data to application layer, application layer is message biography data mart modeling
To transport layer and network layer, transport layer and network layer are packaged the message of application layer by the way of name, the number of formation
It is transferred to link layer according to report, datagram is assembled framing by link layer, is transferred to physical layer, is eventually formed Data packet and is left physical layer
It is transmitted in name data network.
Data packet is converted into the process of IP data packet are as follows: when the Data packet of return reaches middleware by name data network
When, the mapping table established before needing to inquire obtains the relevant information of source address, solves to the Data packet of name data network
The encapsulation that the source address information for recycling inquiry to obtain after packet carries out transport layer and network layer to the message part of application layer obtains
IP data packet, while the corresponding list item in mapping table is deleted, it is transmitted using entering in IP network after link layer packaging, most
After reach source host, so far IP network and name data network an interactive process terminate.
Fig. 5 is Interest packet field list of the invention, as shown in the figure, it is known that each field definition；
Fig. 6 is Data packet field list of the invention, as shown in the figure, it is known that each field definition；
Further, the ApplicationParameters field of the Interest packet is the message portion of IP data packet
Point.
Further, Interest packet CanbePrefix field if it exists, then Interest packet is named as Data
The prefix of name is wrapped, otherwise the name of Interest packet is identical as the name of Data packet.
CanbePrefix field is nonessential field, if is existed mainly by the desired data content of Interest packet
It determines, when (such as real-time news) that desired data content is desirably accurate, real-time is high, so that it may be arranged, if only
It is desirable to inquire the not high content of some relevant, requirement of real-time (such as development of computer history etc.), then can be not provided with.
Further, Interest packet MustbeFresh field if it exists, then router can be read in Interest packet
The Data packet of middle storage, otherwise can not read.
MustbeFresh field is nonessential field, if is existed mainly by the desired data content of Interest packet
It determines, when (such as real-time news) that desired data content is desirably accurate, real-time is high, so that it may be arranged, if only
It is desirable to inquire the not high content of some relevant, requirement of real-time (such as development of computer history etc.), then can be not provided with.
Further, the data packet of the name data network uses TLV said shank.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate technical solution of the present invention example, and
It is not the restriction to a specific embodiment of the invention.It is all made within the spirit and principle of claims of the present invention
Any modifications, equivalent replacements, and improvements etc., should all be included in the scope of protection of the claims of the present invention.
Claims (10)
1. the Novel chain type Proxy Method that a kind of IP network is mixed with name data network, which is characterized in that the described method includes:
Step S1: first network is established；
The first network is name data network；
Step S2: first network realizes chain type agency；
Step S3: establishing the second network, and first network and the second network carry out data interaction；
Second network is name data network or TCP/IP network, if the second network is TCP/IP network, first network
There is middleware between the second network, for converting to data packet.
2. the Novel chain type Proxy Method that a kind of IP network according to claim 1 is mixed with name data network, special
Sign is that the step S2 includes:
The end step S2.1:client issues Interest packet；
Step S2.2: transmitting Interest packet in name data network, if reaching router, executes step S2.3, if reaching
Proxy server executes step S2.10, if reaching destination server, executes step S2.11；
The caching of step S2.3:Interest packet and router carries out prefix matching, names identical Data packet if it exists, executes
Step S2.6, it is no to then follow the steps S2.4；
Step S2.4: it checks in interest table undetermined and names identical list item with the presence or absence of with Interest packet, execute step if it exists
Rapid S2.7, it is no to then follow the steps S2.5；
Step S2.5: Interest packet is forwarded according to forwarding information table, and establishes corresponding list item in interest table undetermined, is executed
Step S2.2；
Step S2.6: returning to Data packet, executes step S2.12；
Step S2.7: interface corresponding with Interest packet is added in the list item of interest table undetermined, and no longer forwards Interest
Packet waits the arrival of Data packet, executes step S2.8；
Whether step S2.8: regular check Data packet reaches router, executes step S2.9 if reaching, no to then follow the steps
S2.8；
Step S2.9:Data packet reaches router, deletes corresponding list item in interest table undetermined, and Data packet is cached,
Execute step S2.12；
Step S2.10:Interest packet/Data packet reaches proxy server, and inquiry forwarding table sees whether prefix matching succeeds, if
Succeed and be Interest packet, executes step S2.2；If succeeding and being Data packet, step S2.12 is executed；It is abandoned if unsuccessful
Interest packet/Data packet of arrival terminates process without agency；
Step S2.11:Interest packet reaches destination server, and destination server examine to the abstract part in name
It looks into, sees whether meet integrality, return to Data packet if meeting, otherwise abandon the Interest packet of arrival, without agency, knot
Line journey；
Step S2.12: Data packet is transmitted in name data network；If reaching router, step S2.8 is executed；If reaching agency
Server executes step S2.10；If reaching client, step S2.13 is executed；
Step S2.13:Data packet returns to client, and agency terminates.
3. the Novel chain type Proxy Method that a kind of IP network according to claim 1 is mixed with name data network, special
Sign is that the middleware includes: physical layer, link layer, conversion layer.
4. the Novel chain type Proxy Method that a kind of IP network according to claim 3 is mixed with name data network, special
Sign is that the middleware carries out conversion to the data packet of first network and the second network and includes:
IP data packet is converted to the Interest packet of name data network；
The Data packet of name data network is converted to IP data packet.
5. the Novel chain type Proxy Method that a kind of IP network according to claim 4 is mixed with name data network, special
Sign is that the process that the IP data packet is converted to the Interest packet of name data network includes:
Step S3.11:IP data packet reaches middleware, by physical layer, is first unpacked by link layer and enters conversion layer, conversion layer will
Source address information in network layer packet header preserves；
Step S3.12: the analysis of application is carried out to the request packet, if dynamic resource then by the Userid word in request header
Section is combined the name as Interest packet with uri, if static resource, then directly using uri as Interest packet
Name；
Step S3.13: searching mapping table, if it exists corresponding list item, executes step S3.14, otherwise by the name and source
Location information is established mapping relations and is saved, and step S3.14 is executed；
Step S3.14: the Interest in name data network is obtained using the message part that the name Reseals request packet
Packet.
6. the Novel chain type Proxy Method that a kind of IP network according to claim 4 is mixed with name data network, special
Sign is that the process that the Data packet of the name data network is converted to IP data packet includes:
Step S3.21: naming the Data packet of data network to reach middleware, by physical layer, is first entered by link layer unpacking and is turned
Layer is changed, conversion layer obtains the name of the response bag；
Step S3.22: middleware inquires mapping table according to name, obtains source address information；
Step S3.23: response bag is packaged again using source address information to obtain IP data packet, while deleting mapping relations
Corresponding list item in table.
7. the Novel chain type Proxy Method that a kind of IP network according to claim 5 is mixed with name data network, special
Sign is that the ApplicationParameters field of the Interest packet is the message part of IP data packet.
8. the Novel chain type Proxy Method that a kind of IP network according to claim 5 is mixed with name data network, special
Sign is, Interest packet CanbePrefix field if it exists, then Interest packet be named as the name of Data packet before
Sew, otherwise the name of Interest packet is identical as the name of Data packet.
9. the Novel chain type Proxy Method that a kind of IP network according to claim 5 is mixed with name data network, special
Sign is, Interest packet MustbeFresh field if it exists, then Interest packet can be read stores in router
Otherwise Data packet can not be read.
10. the Novel chain type Proxy Method that a kind of IP network according to claim 1 is mixed with name data network, special
Sign is that the data packet of the name data network uses TLV said shank.
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