CN105516342B - A kind of P2P penetrates synchronous method and system - Google Patents
A kind of P2P penetrates synchronous method and system Download PDFInfo
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- CN105516342B CN105516342B CN201511026045.7A CN201511026045A CN105516342B CN 105516342 B CN105516342 B CN 105516342B CN 201511026045 A CN201511026045 A CN 201511026045A CN 105516342 B CN105516342 B CN 105516342B
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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
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/256—NAT traversal
Abstract
The present invention relates to network technique field, when by providing one kind including: that client sends data packet to public network server, the data packet includes the first sending time T1；After public network server receives the data packet, returned data packet is sent to client, the returned data packet includes sending time T1, the second sending time TN；When client receives returned data packet, record receives the receiving time T2 of returned data packet, and according to described sending time T1, TN and receiving time T2, calculates public network server prover time T=TN+ (T2-T1)/2；Client determines that synchronous time of break-through, the synchronous time of break-through are TP=T+N when exchanging the address NAT, and wherein N is client negotiation time；Client until synchronous time of break-through TP, client both sides initiate simultaneously P2P penetrate and etc. P2P penetrate synchronous method.It using this method can make that network can be initiated simultaneously between client to penetrate, so that promoting P2P penetrates the probability of success.
Description
Technical field
The present invention relates to network technique fields, more particularly to a kind of P2P to penetrate synchronous method and system.
Background technique
It is afterwards or multiple that software client is located at NAT (Network Address Translation, network address translation)
After NAT, establishes and be connected to the network with the server for being deployed in public network, to get the address NAT of oneself, handed over other clients
Initiate P2P (peer-to-peer, referred to as Peer-To-Peer or P-2-P technology) after changing NAT IP, i.e., it is straight between two points on network
Connect letter.This direct communication is that rate limitation, speed are not determined by the network transfer speeds between 2 points, and only according to
Rely the computing capability and bandwidth of two points (participant) in network, rather than is all gathered in several less servers relying on
On, this technology can mitigate the burden of server significantly.But due to the time of each client can not accomplish Millisecond when
Between it is synchronous, therefore client is initiated after the opportunity that P2P is penetrated always has and first have, thus P2P is caused to penetrate probability of failure increasing.
Summary of the invention
The purpose of the present invention is to provide a kind of P2P to penetrate synchronous method, it is intended to solve existing P2P and penetrate probability of failure
Larger problem.
In a first aspect, a kind of P2P penetrates synchronous method, method includes the following steps:
When client sends data packet to public network server, the data packet includes sending time T1；
After public network server receives the data packet, returned data packet is sent to client, the returned data packet includes
Sending time T1, sending time TN；
When client receives returned data packet, record receives the receiving time T2 of returned data packet, and according to the transmission
Time T1, TN and receiving time T2 calculate public network server prover time T=TN+ (T2-T1)/2；
Client determines that synchronous time of break-through, the synchronous time of break-through are TP=T+N when exchanging the address NAT, wherein N
For client negotiation time；
Until synchronous time of break-through TP, client both sides initiate P2P simultaneously and penetrate client.
Further, the data packet further include: the local ip address of client and port.
Further, the returned data packet further include: the address NAT of client.
Second aspect, a kind of P2P penetrate synchronization system, the system comprises: client, public network server and exchange clothes
Business device；The client is at least 2；
The client is used to send data packet to public network server, and the data packet includes the first sending time T1；
The public network server is described to return for sending returned data packet to the client after receiving the data packet
Returning data packet includes the first sending time T1 and the second sending time TN；
When the client is also used to receive returned data packet, record receives the receiving time T2 of returned data packet, and root
According to the first sending time T1 and the second sending time TN and receiving time T2, public network server prover time T is calculated
=TN+ (T2-T1)/2；
The client is also used to determine that synchronous time of break-through, the synchronous time of break-through are TP=T+N, and wherein N is visitor
Family end negotiation time；
The swap server exchanges the address NAT for client；
The client is also used to until synchronous time of break-through TP, and client both sides initiate P2P simultaneously and penetrate.
Further, the data packet further include: the local ip address of client and port.
Further, the returned data packet further include: the address NAT of client.
The utility model has the advantages that the present invention penetrates synchronous method by providing a kind of P2P, the described method comprises the following steps: client
Hold to public network server send data packet when, the data packet includes sending time T1；Public network server receives the data packet
Afterwards, returned data packet is sent to client, the returned data packet includes sending time T1, sending time TN；Client receives
When returned data packet, record receives the receiving time T2 of returned data packet, and according to described sending time T1, TN and receiving time
T2 calculates public network server prover time T=TN+ (T2-T1)/2；Client is determined to synchronize and be penetrated when exchanging the address NAT
Time, the synchronous time of break-through are TP=T+N, and wherein N is client negotiation time；Client waits until synchronous time of break-through TP
When, client both sides initiate P2P simultaneously and penetrate.It using this method can make that network can be initiated simultaneously between client to penetrate, from
And it promotes P2P and penetrates the probability of success.
Detailed description of the invention
Fig. 1 is that the P2P that one embodiment of the invention provides penetrates synchronous method flow chart；
Fig. 2 is the structure chart that the P2P that one embodiment of the invention provides penetrates synchronization system.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawing and specific implementation
Invention is further described in detail for mode.
The P2P that Fig. 1 shows the offer of this one embodiment of the invention penetrates synchronous method, method includes the following steps:
When S101, client send data packet to public network server, the data packet includes sending time T1.
In this step, start public network server and swap server, start P2P client, i.e. customer end A and client
B includes the sending time T1 for sending data packet in data packet, simultaneously when wherein customer end A sends data packet to public network server
It also further include local ip address and the port of client in data packet.
After S102, public network server receive the data packet, returned data packet, the returned data packet are sent to client
Including sending time T1, sending time TN.
In this step, after customer end A sends data packet to public network server in public network server receiving step S101, to
Customer end A sends returned data packet, and returned data packet includes sending time T1, sending time TN, while can also include client
The address NAT at end.
When S103, client receive returned data packet, record receives the receiving time T2 of returned data packet, and according to described
Sending time T1, TN and receiving time T2 calculate public network server prover time T=TN+ (T2-T1)/2.
In step, customer end A receives the returned data packet of public network server transmission, and record receives returned data packet
Receiving time T2 sends the sending time T1 of data packet, public network server to client to public network server further according to customer end A
A sends the sending time TN of returned data packet and the receiving time T2 of customer end A reception returned data packet, calculates public network service
Device prover time T=TN+ (T2-T1)/2.
S104, client determine that synchronous time of break-through, the synchronous time of break-through are TP=T+N when exchanging the address NAT,
Wherein N is client negotiation time.
In this step, client negotiates to determine that synchronous time of break-through, synchronous time of break-through are TP=T+N, and wherein N is visitor
Family end negotiation time, for example, N are after 10 seconds, and the address NAT of synchronous time of break-through TP and oneself are sent to friendship by customer end A
Server is changed, the address NAT of synchronous time of break-through TP and customer end A are sent to customer end B by swap server；Customer end B
The address NAT of oneself is sent to swap server, the address NAT of customer end B is returned to customer end A again by swap server.
Until synchronous time of break-through TP, client both sides initiate P2P simultaneously and penetrate for S105, client.
In this step, customer end A, B are timed to synchronous time of break-through TP, and the time is to i.e. to the address other side client NAT
P2P is initiated to penetrate.By calculating synchronous time of break-through, can make, which can initiate simultaneously network between client, is penetrated, to be promoted
P2P penetrates the probability of success.
On the other hand, the present invention also provides a kind of P2P to penetrate synchronization system, which includes: client 21, public network clothes
Business device 22 and swap server 23；Client 21 is at least 2；
Client 21 is used to send data packet to public network server, which includes the first sending time T1；
Public network server 22 is described to return for sending returned data packet to the client 21 after receiving the data packet
Returning data packet includes the first sending time T1 and the second sending time TN；
When client 21 is also used to receive returned data packet, the receiving time T2 of record reception returned data packet, and according to
The first sending time T1 and the second sending time TN and receiving time T2, calculates public network server prover time T=
TN+(T2-T1)/2；
Client 21 is also used to determine that synchronous time of break-through, the synchronous time of break-through are TP=T+N, and wherein N is client
Hold negotiation time；
Swap server 23 exchanges the address NAT for client；
Client 21 is also used to until synchronous time of break-through TP, and client both sides initiate P2P simultaneously and penetrate.
In system and previous embodiment in the present embodiment P2P penetrate synchronous method be based on the same inventive concept under two
A aspect is in front described in detail method implementation process, so those skilled in the art can retouch according to aforementioned
The structure and implementation process of the system being well understood in this implementation are stated, in order to illustrate the succinct of book, details are not described herein again.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of P2P penetrates synchronous method, which is characterized in that the described method comprises the following steps:
Customer end A sends data packet to public network server, and the data packet includes the first sending time T1；
After public network server receives the data packet, returned data packet is sent to customer end A, the returned data packet includes described
First sending time T1 and the second sending time TN；
When customer end A receives returned data packet, record receives the receiving time T2 of returned data packet, and sends according to described first
Time T1 and the second sending time TN and receiving time T2, calculates public network server prover time T=TN+ (T2-T1)/2；
Customer end A determines that synchronous time of break-through, the synchronous time of break-through are TP=T+ when exchanging the address NAT with customer end B
N, wherein N is the negotiation time of customer end A and customer end B；
Customer end A with customer end B until synchronous time of break-through TP, initiate P2P with customer end B both sides simultaneously and penetrate by customer end A.
2. P2P according to claim 1 penetrates synchronous method, which is characterized in that the data packet further include: client
Local ip address and port.
3. P2P according to claim 1 or 2 penetrates synchronous method, which is characterized in that the returned data packet further include:
The address NAT of client.
4. a kind of P2P penetrates synchronization system, which is characterized in that the system comprises: client, public network server and exchange clothes
Business device；The client is at least 2；The client includes at least customer end A and customer end B；
The customer end A is used to send data packet to public network server, and the data packet includes the first sending time T1；
The public network server is for sending returned data packet, the return number to the customer end A after receiving the data packet
It include the first sending time T1 and the second sending time TN according to packet；
When the customer end A is also used to receive returned data packet, record receives the receiving time T2 of returned data packet, and according to institute
The first sending time T1 and the second sending time TN and receiving time T2 is stated, public network server prover time T=TN+ is calculated
(T2-T1)/2；
The customer end A is also used to determine that synchronous time of break-through, the synchronous time of break-through are TP=T+N with customer end B, wherein
N is the negotiation time of customer end A and customer end B；
The swap server exchanges the address NAT with customer end B for customer end A；
The customer end A is also used to customer end B until synchronous time of break-through TP, and customer end A is sent out simultaneously with customer end B both sides
P2P is played to penetrate.
5. P2P according to claim 4 penetrates synchronization system, which is characterized in that the data packet further include: client
Local ip address and port.
6. P2P according to claim 4 or 5 penetrates synchronization system, which is characterized in that the returned data packet further include:
The address NAT of client.
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| CN201511026045.7A CN105516342B (en) | 2015-12-30 | 2015-12-30 | A kind of P2P penetrates synchronous method and system |
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| CN105516342B true CN105516342B (en) | 2019-02-22 |
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| CN107547620B (en) * | 2017-06-22 | 2021-06-22 | 新华三信息安全技术有限公司 | Response time obtaining method and device |
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