CN105491178B - A kind of host network card IP address acquisition methods based on software defined network - Google Patents
A kind of host network card IP address acquisition methods based on software defined network Download PDFInfo
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- CN105491178B CN105491178B CN201510817368.1A CN201510817368A CN105491178B CN 105491178 B CN105491178 B CN 105491178B CN 201510817368 A CN201510817368 A CN 201510817368A CN 105491178 B CN105491178 B CN 105491178B
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- 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
- H04L61/45—Network directories; Name-to-address mapping
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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
- H04L45/74—Address processing for routing
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Abstract
A kind of host network card IP address acquisition methods based on software defined network, including following operative step：(1) sender's host A establishes First Contact Connections with recipient's host B；(2) host A sends duplicate answer Dupack messages to host B, includes addition address option MP_Addaddress in the message；(3) SDN controllers get other network interface card IP address of host A included in MP_Addaddress；(4) the Dupack messages received are transmitted to host B by the openflow protocol switch of host B side；(5) host B gets other network interface card IP address of host A included in MP_Addaddress.
Description
Technical field
The present invention relates to a kind of host network card IP address acquisition methods based on software defined network belong to information technology neck
Domain especially belongs to software defined network technical field.
Background technology
Software defined network (Software Defined Networking, SDN) is a centrally controlled network, SDN controls
Multiple network nodes are uniformly controlled by device processed, can relatively easily obtain network equipment information, the control network equipment, corresponding
A unified network view is presented with/client, wherein have interchanger, router, virtual machine, storage, virtual subnet and use
The virtual gateway communicated between virtual subnet, user can be gone according to the network planning of oneself configuration virtual machine IP address,
Configure the routing rule between subnet and subnet.The open customization of SDN and concentrate control characteristic, solve to a certain extent because
The rigid problem of spy's net, imparts the ability of the subscriber customized network system and procotol, and user to a certain extent can be with
According to the demand of oneself exploitation, the application to draw oneself up and hardware platform, private network can be built with independent and flexible.
MPTCP is extension of the MPTCP working groups of IETF to conventional TCP, is added to MPTCP layers, original TCP layer becomes
It is subflow layers multiple, and each subflow layers correspond to one IP layers, that is, each subflow can be considered as one
TCP connection.MPTCP is allowed users to establish on incoherent path and is correspondingly connected with, and on these paths with individual
The mode of subflow carries out data transmission.
The advantage of both software defined network and MPTCP are combined, multi-path data transmission is provided on SDN for user
As an important research direction of current network technique field, but to realize the data transmission of multipath on SDN, host is more
The IP address of network interface card just needs to inform SDN controllers and Correspondent Node, how effectively to realize that this point becomes software defined network
It is badly in need of the technical barrier solved in field.
Invention content
In view of this, the purpose of the present invention is inventing a kind of method, realize to the more of the host in software defined network SDN
Effective acquisition of network interface card IP address, the multi-path data transmission to realize between host provide basis.In order to achieve the above object,
The present invention proposes a kind of host network card IP address acquisition methods based on software defined network, and the method includes following operations
Step：
(1) sender's host A establishes First Contact Connections by software defined network SDN and recipient's host B, which is
It is carried out under software defined network SDN controllers control, the connection is complete using the three-way handshake mode of MPTCP agreements
At；After the host A is established with host B First Contact Connections, the SDN controllers record the four-tuple of the connection, i.e.,：Source
Port address, destination interface address, source IP address, purpose IP address；
(2) host A sends duplicate answer Dupack messages to host B, includes addition address option MP_ in the message
Addaddress, while destination interface address is added into a preset fixed offset value；The Dupack messages and host A
The flow table of access side openflow protocol switch A lose cooperation, then openflow protocol switch A passes through
The Dupack messages are sent to the software defined network SDN controllers by Packet_in message；The addition
The IP address of other network interface cards of host A is contained in address option MP_Addaddress；
(3) the SDN controllers described in receive the Packet_in message, parse the Dupack messages, described
SDN controllers identify the specific modification of destination interface address in the Dupack messages, then the SDN controllers pair
The Dupack messages are parsed, and host A included in the addition address option MP_Addaddress is got
Other network interface cards IP address；
(4) the SDN controllers described in modify to the destination interface address in the Dupack messages, revert to master
The original destination interface addresses machine A, then SDN controllers the modified Dupack messages are sent out by Packet_out message
The access side openflow protocol switch B of host B are given, this information order openflow protocol switch B will be received
The Dupack messages be transmitted to host B；
(5) host B described in receives the Dupack messages for including addition address option MP_Addaddress
Afterwards, whether including that addition address option MP_Addaddress judges to the Dupack messages, adding if parsed comprising if
Address option MP_Addaddress, such host B is added just to get institute in the addition address option MP_Addaddress
Including host A other network interface cards IP address.
The content of the step (1) specifically includes following operation sub-step：
(11) sender's host A described in sends the SYN with MP_CAPABLE options to recipient's host B and reports
The First Contact Connections between host A and host B are established in text, request；
(12) flow table of the access side openflow protocol switch A of the SYN messages and host A loses cooperation, then should
The SYN messages are sent to the software defined network by openflow protocol switch A by Packet_in message
SDN controllers；
(13) First Contact Connections of the SDN controllers between the host A and host B described in establish path, and to
Relevant openflow protocol switch issues two-way flow table on the path；
(14) the SYN messages are sent to the host A by the SDN controllers described in by Packet_out message
Access side openflow protocol switch A, then the SYN messages host B is reached according to the flow table that has issued；
(15) message (i.e. SYN+ACK messages and ACK messages) sum number shaken hands twice after between host A and host B
It will all be completed on the path according to transmission；
(16) four-tuple of the First Contact Connections between the host A and host B described in SDN controllers record described in, i.e.,：
Source port address, destination interface address, source IP address, purpose IP address.
The beneficial effects of the present invention are overcome existing SDN network controller cannot get network edge side with
The connected host network card information of openflow protocol switch, i.e., it is to belong to same which IP address SDN controllers, which cannot get,
One host, and this patent makes the host that the SDN controllers positioned at network center can be with dynamic access to network edge side
With the correspondence of host network card IP address, SDN can more fully recognize the whole topology of network after getting these information
Situation, to calculate the reasonable communication path between host.
Description of the drawings
Fig. 1 is a kind of flow of host network card IP address acquisition methods based on software defined network proposed by the present invention
Figure.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made below in conjunction with the accompanying drawings further
Detailed description.
Referring to Fig. 1, a kind of host network card IP address acquisition methods based on software defined network proposed by the present invention are introduced,
The method includes following operative steps：
(1) sender's host A establishes First Contact Connections by software defined network SDN and recipient's host B, which is
It is carried out under software defined network SDN controllers control, the connection is complete using the three-way handshake mode of MPTCP agreements
At；After the host A is established with host B First Contact Connections, the SDN controllers record the four-tuple of the connection, i.e.,：Source
Port address, destination interface address, source IP address, purpose IP address；
(2) host A sends duplicate answer Dupack messages to host B, includes addition address option MP_ in the message
Addaddress, while destination interface address is added into a preset fixed offset value, (such as：Fixed offset value is
900)；The flow table of the access side openflow protocol switch A of the Dupack messages and host A loses cooperation, then should
The Dupack messages are sent to the software defined network by openflow protocol switch A by Packet_in message
Network SDN controllers；IP address (the example of other network interface cards of host A is contained in the addition address option MP_Addaddress
Such as：We in an experiment, host A also includes that other two are thrown the net card, NIC address be respectively 10.108.127.234 with
10.108.127.245)；
(3) the SDN controllers described in receive the Packet_in message, parse the Dupack messages, described
SDN controllers identify the specific modification of destination interface address in the Dupack messages, then the SDN controllers pair
The Dupack messages are parsed, and host A included in the addition address option MP_Addaddress is got
Other network interface cards IP address；
(4) the SDN controllers described in subtract front to the destination interface address in the Dupack messages and preset
Droop value (such as：Fixed offset value is 900), to revert to the original destination interface address of host A, and then SDN is controlled
The access side openflow agreements that the modified Dupack messages are sent to host B by Packet_out message by device exchange
The Dupack messages received are transmitted to host B by machine B, this information order openflow protocol switch B；
(5) host B described in receives the Dupack messages for including addition address option MP_Addaddress
Afterwards, whether including that addition address option MP_Addaddress judges to the Dupack messages, adding if parsed comprising if
Address option MP_Addaddress, such host B is added just to get institute in the addition address option MP_Addaddress
Including host A other network interface cards IP address.
The content of the step (1) specifically includes following operation sub-step：
(11) sender's host A described in sends the SYN with MP_CAPABLE options to recipient's host B and reports
The First Contact Connections between host A and host B are established in text, request；
(12) flow table of the access side openflow protocol switch A of the SYN messages and host A loses cooperation, then should
The SYN messages are sent to the software defined network by openflow protocol switch A by Packet_in message
SDN controllers；
(13) First Contact Connections of the SDN controllers between the host A and host B described in establish path (first
Secondary connection is established by the three-way handshake mode of tcp, i.e. A sends syn to B, and B replys syn+ack after receiving the information, and A is last
Send ack), and relevant openflow protocol switch issues two-way flow table on the path；
(14) the SYN messages are sent to the host A by the SDN controllers described in by Packet_out message
Access side openflow protocol switch A, then the SYN messages host B is reached according to the flow table that has issued；
(15) message (i.e. SYN+ACK messages and ACK messages) sum number shaken hands twice after between host A and host B
It will all be completed on the path according to transmission；
(16) four-tuple of the First Contact Connections between the host A and host B described in SDN controllers record described in, i.e.,：
Source port address, destination interface address, source IP address, purpose IP address.
Inventor is tested the method for the present invention on try net, by largely testing and emulating, obtains
Satisfied experimental result, it was demonstrated that the method for the present invention is feasible and very effective.
Claims (2)
1. a kind of host network card IP address acquisition methods based on software defined network, it is characterised in that：The method includes under
Row operating procedure：
(1) sender's host A establishes First Contact Connections by software defined network SDN and recipient's host B, which is in institute
The lower progress of software defined network SDN controllers control is stated, which is completed using the three-way handshake mode of MPTCP agreements；Institute
After the host A stated is established with host B First Contact Connections, the SDN controllers record the four-tuple of the connection, i.e.,：Source port
Address, destination interface address, source IP address, purpose IP address；
(2) host A sends duplicate answer Dupack messages to host B, includes addition address option MP_ in the message
Addaddress, while destination interface address is added into a preset fixed offset value；The Dupack messages and host A
The flow table of access side openflow protocol switch A lose cooperation, then openflow protocol switch A passes through
The Dupack messages are sent to the software defined network SDN controllers by Packet_in message；The addition
The IP address of other network interface cards of host A is contained in address option MP_Addaddress；
(3) the SDN controllers described in receive the Packet_in message, parse the Dupack messages, SDN controls
Device processed identifies the specific modification of destination interface address in the Dupack messages, and then the SDN controllers are to described
Dupack messages parsed, get its of host A included in the addition address option MP_Addaddress
The IP address of its network interface card；
(4) the SDN controllers described in modify to the destination interface address in the Dupack messages, revert to host A
Original destination interface address, then SDN controllers the modified Dupack messages are sent by Packet_out message
To the access side openflow protocol switch B of host B, this information order openflow protocol switch B will be received
The Dupack messages are transmitted to host B；
(5) it is right after the host B described in receives the Dupack messages comprising addition address option MP_Addaddress
Whether the Dupack messages are judged comprising addition address option MP_Addaddress, if with parsing addition comprising if
Location option MP_Addaddress, such host B are just got included in the addition address option MP_Addaddress
Host A other network interface cards IP address.
2. a kind of host network card IP address acquisition methods based on software defined network according to claim 1, feature
It is：The content of the step (1) specifically includes following operation sub-step：
(11) sender's host A described in sends the SYN messages with MP_CAPABLE options to recipient's host B,
The First Contact Connections between host A and host B are established in request；
(12) flow table of the access side openflow protocol switch A of the SYN messages and host A loses cooperation, then should
The SYN messages are sent to the software defined network by openflow protocol switch A by Packet_in message
SDN controllers；
(13) First Contact Connections of the SDN controllers between the host A and host B described in establish path, the roads Bing Xianggai
Relevant openflow protocol switch issues two-way flow table on diameter；
(14) the SYN messages are sent to connecing for the host A by the SDN controllers described in by Packet_out message
Enter side openflow protocol switch A, then the SYN messages reach the host B according to the flow table issued；
(15) message shaken hands twice after between host A and host B, i.e. SYN+ACK messages and ACK messages are passed with data
It is defeated all to complete on the path；
(16) four-tuple of the First Contact Connections between the host A and host B described in SDN controllers record described in, i.e.,：Source
Port address, destination interface address, source IP address, purpose IP address.
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| US10091097B2 (en) * | 2016-10-27 | 2018-10-02 | Nanning Fugui Precision Industrial Co., Ltd. | Transmission path optimization method and software-defined networking controller using the method |
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