CN104125128A - Method for supporting VLAN (virtual local area network) by aid of Linux soft bridge - Google Patents
Method for supporting VLAN (virtual local area network) by aid of Linux soft bridge Download PDFInfo
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- CN104125128A CN104125128A CN201410395046.8A CN201410395046A CN104125128A CN 104125128 A CN104125128 A CN 104125128A CN 201410395046 A CN201410395046 A CN 201410395046A CN 104125128 A CN104125128 A CN 104125128A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
- H04L12/4675—Dynamic sharing of VLAN information amongst network nodes
- H04L12/4679—Arrangements for the registration or de-registration of VLAN attribute values, e.g. VLAN identifiers, port VLAN membership
Abstract
The invention discloses a method for supporting a VLAN (virtual local area network) by the aid of a Linux soft bridge. The method includes steps of creating the network bridge br0 and a VLAN port in a Linux kernel, adding network ports and the VLAN port into the network bridge br0 to form corresponding network bridge ports and maintaining the network bridge ports in a VLAN port linked list group form; configuring the network bridge ports in the network bridge br0 and creating or updating corresponding VLAN port linked lists; forwarding data on the basis of the VLAN by the aid of the network bridge br0. The method has the advantages that the VLAN can be supported by the aid of the network bridge of a Linux network protocol stack, and layer-2 forwarding on the basis of the VLAN can be implemented on the different network ports; the method is beneficial to implementing layer-2 VLAN functions of Linux-based network equipment on the basis of supporting routes, the VLAN ports and the network ports in the bridge can be flexibly configured, and the shortcoming that VLAN functions are not supported by an existing Linux soft bridge can be overcome.
Description
Technical field
The present invention relates to the network equipment, be specifically related to the method for the soft bridge supported vlans of Linux.
Background technology
(SuSE) Linux OS has been widely used in various embedded systems.Compare and have following advantage with other operating systems: first, Linux is open source code, does not have black box technology, the numerous Linux fans that spread all over the world are again Linux developer's powerful technical supports; Secondly, the kernel of Linux is little, efficiency is high, and the renewal speed of kernel is very fast, and Linux is customizable, its system kernel minimum K bytes up to a hundred of only having an appointment; Finally, Linux is free OS, has competitiveness in price.In addition, Linux also has the needed a lot of characteristics of embedded OS, and outstanding is exactly that Linux is adapted to multiple CPU and multiple hardwares platform, is a cross-platform system.Linux has the most complete support to ICP/IP protocol the most frequently used in network, provide comprise 10,000,000,100,000,000, the Ethernet of gigabit and wireless network, token-ring network, the even support of satellite, so Linux is suitable for the network equipment.
(SuSE) Linux OS has and has huge market prospects and commercial opportunity, a large amount of specialized companies and product are there is, as Montavista Lineo Emi etc., there is employer's organization as Embedded Linux Consortum etc., obtain the support of world-renowned Computer Company and OEM Ban Ji manufacturer, such as IBM Motorola Intel etc.Traditional embedded system manufacturer has also adopted Linux strategy, as Lynxworks Windriver QNX etc., also has the support of a large amount of built-in Linux fans on Internet.Built-in Linux is supported nearly all embedded type CPU and is transplanted to nearly all embedded OEM plate.
(SuSE) Linux OS application is very extensive, and main application has information household appliances, PDA, Set Top Box, Digital Telephone, Answering Machine, Screen Phone, data network, Ethernet Switches, Router, Bridge, Hub, Remote access servers, ATM, Frame relay, telecommunication, medical electronics, communications and transportation computer peripheral equipment, Industry Control, aerospace field etc.
At present in the equipment such as router applications and bridge, all there is the bridging requirement between heterogeneous networks port, such as between wireless WiFi port and ethernet port, need bridge data between user-side port and network-side port etc.
Linux network protocol stack has been realized basic bridge function, supports MAC address learning, the aging and package forward function of bridge, can carry out in real time the establishment of bridge, and the port in bridge can carry out dynamic appending and deletion, supports STP agreement etc.Linux kernel network protocol stack has been realized 802.1Q protocol stack in real network port basis in addition, by the virtual network port creating, can process the packet with 802.1Q mark, for adding and delete flag, can realize processed according to the 802.1p in mark simultaneously.
But not supported vlans function of the soft bridge of Linux network protocol stack, and for network equipments such as bridges, generally all need supported vlans function, there is functional defect in the soft bridge of Linux network protocol stack therefore.
Summary of the invention
Technical problem to be solved by this invention is the not problem of supported vlans function of the soft bridge of Linux.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide the method for the soft bridge supported vlans of a kind of Linux, comprises the following steps:
Steps A 10, create bridge br0 and vlan network port at linux kernel, and the network port and vlan network port are joined in bridge br0 and form corresponding bridge port, bridge port is safeguarded with the form of vlan port chained list group;
Bridge port in steps A 20, configuration bridge br0, creates or upgrades corresponding vlan port chained list;
Steps A 30, utilize bridge br0 to realize the data retransmission based on VLAN.
In said method, in steps A 10, the maintaining method of bridge vlan port chained list is as follows:
(1) one group of bridge port that VLAN ID is identical is organized by a vlan port chained list;
(2) in the structure member of each bridge port, comprise the linked list head information of pointing to affiliated vlan port chained list, while forwarding for packet inundation, travel through all ends on VLAN;
(3), while creating new vlan network port in bridge, need to create new vlan port chained list;
(4) while adding the network port or vlan network port to bridge, search corresponding vlan port chained list according to the PVID of bridge port or VLAN ID, add the table tail of bridge port to this vlan port chained list;
(5) while deleting in bridge the network port or vlan network port, search corresponding vlan port chained list according to the VLAN ID of bridge port, traversal vlan port chained list is searched corresponding member, by its deletion.
In said method, steps A 20 comprises the following steps:
The network port and the VLAN ID of steps A 21, configuration vlan network port, create the virtual port based on 802.1Q, the PVID attribute of configuration network port;
Steps A 22, judge whether newly-increased bridge port is the network port, if the network port, obtain the PVID of this bridge port, go to step A23; If vlan network port, obtain the VLAN ID of this virtual port, go to step A23;
Steps A 23, taking VLAN ID or PVID as index, search corresponding vlan port chained list and whether exist, if there is no, create new vlan port chained list; If exist, newly-increased bridge port added to corresponding vlan port chained list.
In said method, steps A 30 comprises the following steps:
Steps A 31, the network port receive packet;
Steps A 32, check that this packet, whether with 802.1Q TAG, if data pack protocol type is 802.1Q, goes to step A33; Otherwise go to step A34;
Steps A 33, peel off the 802.1Q field in packet, the receiving port of Update Table bag is vlan network port, goes to step A34;
Steps A 34, judge whether the receiving port of packet is bridge port, if so, goes to step A35; Otherwise send the processing of Linux upper-layer protocol stack, finish;
Steps A 35, packet enter bridge protocol stack and process, and create or upgrade and transmit;
Steps A 36, judge that the target MAC (Media Access Control) address of packet is broadcast address or unicast address, if broadcast address goes to step A39; Otherwise go to step A37;
Steps A 37, search and transmit according to packet rs destination MAC Address and vlan information;
If steps A 38 is transmitted the middle existence vlan network port identical with target MAC (Media Access Control) address, go to step A40; If there is no, go to step A39;
Steps A 39, according to receiving the network port VLAN id information of packet, obtain the bridge vlan port chained list under this bridge port, other network ports in vlan port chained list carry out inundation;
Steps A 40, navigate to the vlan network port identical with target MAC (Media Access Control) address, forwarded by bridge port;
Steps A 41, judge that whether bridge port is vlan network port, if so, goes to step A42; Otherwise go to step A43;
Steps A 42, add corresponding 802.1Q TAG by 802.1Q protocol stack, go to step A43;
Steps A 43, packet is sent via the network port;
Steps A 44, end.
The present invention, on the soft bridge protocol stack of Linux basis, in the time transmitting list item study, the port information based on packet and VLAN ID upgrade forwarding-table item; In the time determining to forward destination interface, except inquiry destination interface, also compare the VLAN ID of list item vlan information and packet, decide forwarding destination interface, thereby realized the functionality of vlan of the soft bridge of Linux.
Brief description of the drawings
Fig. 1 is the method flow diagram of the soft bridge supported vlans of Linux;
Fig. 2 is linux kernel bridge vlan port chained list;
Fig. 3 is the configuration vlan port flow chart of the soft bridge supported vlans of Linux;
Fig. 4 is the data retransmission flow chart of soft bridge supported vlans.
Embodiment
Below in conjunction with Figure of description and specific embodiment, the present invention is described in detail.
The implementation environment of the present embodiment is the network equipment of embedded Linux system, supposes that the network port of this network equipment is respectively eth0, eth1, and eth2, eth3, eth4 ..., VLAN configuration is as follows:
Eth0:PVID is 100, belongs to VLAN 101,102,103,104 simultaneously;
Eth1:PVID is 101, belongs to VLAN 100,102,103,104 simultaneously;
Eth2:PVID is 102, belongs to VLAN 101,100,103,104 simultaneously;
Eth3:PVID is 103, belongs to VLAN 101,102,100,104 simultaneously;
Eth4:PVID is 104, belongs to VLAN 101,102,103,100 simultaneously;
…
As shown in Figure 1, the method for the soft bridge supported vlans of Linux provided by the invention comprises the following steps:
Steps A 10, in the linux kernel of the network equipment, create bridge br0 and vlan network port (virtual port ethx.xxx), and by the network port (physical port ethx, there is PVID attribute) and vlan network port join in bridge br0 and form corresponding bridge vlan port (abbreviation bridge port), bridge port is safeguarded with the form of vlan port chained list group as shown in Figure 1 in linux kernel.For example, in Fig. 1 the first row: VLAN100 represents VLAN ID=100 bridge port, and eth0 represents the network port, eth1.100, eth2.100, eth3.100, eth4.100 represent the vlan network port that bridge port is identical.
The maintaining method of vlan port chained list is as follows:
(1) one group of bridge port that VLAN ID is identical is organized by a vlan port chained list, as the every a line in Fig. 1;
(2) in the structure member of each bridge port, comprise the linked list head information of pointing to the affiliated vlan port chained list of this bridge port, while forwarding for packet inundation, travel through all of the port on this VLAN;
(3), when create new vlan network port in bridge time, need to create new vlan port chained list;
(4), while adding the network port or vlan network port to bridge, search corresponding vlan port chained list according to the PVID of bridge port or VLAN ID, and add the table tail of bridge port to vlan port chained list;
(5) when delete the network port or vlan network port from bridge time, search corresponding vlan port chained list according to the VLAN ID of bridge port, traversal vlan port chained list is searched corresponding member, and deletes from vlan port chained list.
Bridge port in steps A 20, configuration bridge br0, creates or upgrades corresponding vlan port chained list.
Bridge port comprises the network port and vlan network port information, and wherein the network port has PVID attribute, the port vlan ID that PVID is the network port.
As shown in Figure 2, steps A 20 specifically comprises the following steps:
Steps A 21, by local WEB administration page, the network port (ethx) of newly-increased vlan network port and VLAN ID are configured to the form of the virtual port (ethx.xxx) based on 802.1Q, wherein, vlan network port is configured based on real network port, and VLAN scope is from 1-4095; By the PVID attribute of local WEB administration page configuration network port (ethx),, under configuring condition, all-network port PVID is not 1;
Steps A 22, the network port and the new vlan network port creating are joined after bridge br0 (having increased bridge port newly), judge whether this bridge port is the network port, if the network port, obtain the PVID of this bridge port, go to step A23; If vlan network port, obtain the VLAN ID of this vlan network port, go to step A23;
Steps A 23, taking PVID or VLAN ID as index, search corresponding vlan port chained list and whether exist, if there is no, create new vlan port chained list; If exist, newly-increased bridge port joined in corresponding vlan port chained list and safeguarded.
Steps A 30, utilize bridge br0 to realize the data retransmission based on VLAN.
As shown in Figure 3, steps A 30 specifically comprises the following steps:
Steps A 31, network port ethx receive packet;
Bridge Hook Function in steps A 32, linux kernel checks that this packet, whether with 802.1Q TAG, if data pack protocol type is 802.1Q, goes to step A33; If data pack protocol type is not 802.1Q, go to step A34;
Steps A 33, peel off the 802.1Q field in packet by 802.1Q protocol stack handle packet, the receiving port of Update Table bag is vlan network port (ethx.xxx), goes to step A34;
Steps A 34, judge whether the receiving port of packet is bridge port, if so, goes to step A35, otherwise send the processing of Linux upper-layer protocol stack, finish;
Steps A 35, packet enter bridge protocol stack and process, and in bridge br0, search and transmit based on source data packet MAC Address and vlan information, if there is no, add forwarding-table item, if existed, upgrade forwarding-table item timestamp;
Steps A 36, judge that the target MAC (Media Access Control) address of packet is broadcast address or unicast address, if broadcast address goes to step A39; If packet rs destination MAC Address is unicast address, go to step A37;
Steps A 37, search and transmit according to packet rs destination MAC Address and vlan information;
If steps A 38 is transmitted the middle existence vlan network port identical with target MAC (Media Access Control) address, go to step A40; If there is no, go to step A39;
Steps A 39, according to receiving the network port VLAN id information of packet, obtain the bridge vlan port chained list under this bridge port, other network ports in vlan port chained list carry out inundation;
Steps A 40, navigate to the vlan network port identical with target MAC (Media Access Control) address, forwarded by bridge port;
Due to the establishment of vlan port chained list, make broadcast packet inundation scope be confined to have between the soft bridge port of identical VLAN division;
Steps A 41, judge that whether bridge port is vlan network port, if so, goes to step A42; Otherwise go to step A43;
Steps A 42, add corresponding 802.1Q TAG by 802.1Q protocol stack, go to step A43;
Steps A 43, packet is sent via the network port;
Steps A 44, end.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (4)
- The method of the soft bridge supported vlans of 1.Linux, is characterized in that, comprises the following steps:Steps A 10, create bridge br0 and vlan network port at linux kernel, and the network port and vlan network port are joined in bridge br0 and form corresponding bridge port, bridge port is safeguarded with the form of vlan port chained list group;Bridge port in steps A 20, configuration bridge br0, creates or upgrades corresponding vlan port chained list;Steps A 30, utilize bridge br0 to realize the data retransmission based on VLAN.
- 2. as claimed in claim 1, it is characterized in that, in steps A 10, the maintaining method of bridge vlan port chained list is as follows:(1) one group of bridge port that VLAN ID is identical is organized by a vlan port chained list;(2) in the structure member of each bridge port, comprise the linked list head information of pointing to affiliated vlan port chained list, while forwarding for packet inundation, travel through all of the port on VLAN;(3), while creating new vlan network port in bridge, need to create new vlan port chained list;(4) while adding the network port or vlan network port to bridge, search corresponding vlan port chained list according to the PVID of bridge port or VLAN ID, add the table tail of bridge port to this vlan port chained list;(5) while deleting in bridge the network port or vlan network port, search corresponding vlan port chained list according to the VLAN ID of bridge port, traversal vlan port chained list is searched corresponding member, by its deletion.
- 3. as claimed in claim 1, it is characterized in that, steps A 20 comprises the following steps:The network port and the VLAN ID of steps A 21, configuration vlan network port, create the virtual port based on 802.1Q, the PVID attribute of configuration network port;Steps A 22, judge whether newly-increased bridge port is the network port, if the network port, obtain the PVID of this bridge port, go to step A23; If vlan network port, obtain the VLAN ID of this virtual port, go to step A23;Steps A 23, taking VLAN ID or PVID as index, search corresponding vlan port chained list and whether exist, if there is no, create new vlan port chained list; If exist, newly-increased bridge port added to corresponding vlan port chained list.
- 4. as claimed in claim 1, it is characterized in that, steps A 30 comprises the following steps:Steps A 31, the network port receive packet;Steps A 32, check that this packet, whether with 802.1Q TAG, if data pack protocol type is 802.1Q, goes to step A33; Otherwise go to step A34;Steps A 33, peel off the 802.1Q field in packet, the receiving port of Update Table bag is vlan network port, goes to step A34;Steps A 34, judge whether the receiving port of packet is bridge port, if so, goes to step A35; Otherwise send the processing of Linux upper-layer protocol stack, finish;Steps A 35, packet enter bridge protocol stack and process, and create or upgrade and transmit;Steps A 36, judge that the target MAC (Media Access Control) address of packet is broadcast address or unicast address, if broadcast address goes to step A39; Otherwise go to step A37;Steps A 37, search and transmit according to packet rs destination MAC Address and vlan information;If steps A 38 is transmitted the middle existence vlan network port identical with target MAC (Media Access Control) address, go to step A40; If there is no, go to step A39;Steps A 39, according to receiving the network port VLAN id information of packet, obtain the bridge vlan port chained list under this bridge port, other network ports in vlan port chained list carry out inundation;Steps A 40, navigate to the vlan network port identical with target MAC (Media Access Control) address, forwarded by bridge port;Steps A 41, judge that whether bridge port is vlan network port, if so, goes to step A42; Otherwise go to step A43;Steps A 42, add corresponding 802.1Q TAG by 802.1Q protocol stack, go to step A43;Steps A 43, packet is sent via the network port;Steps A 44, end.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410395046.8A CN104125128B (en) | 2014-08-12 | 2014-08-12 | Method for supporting VLAN (virtual local area network) by aid of Linux soft bridge |
| PCT/CN2015/086354 WO2016023443A1 (en) | 2014-08-12 | 2015-08-07 | Method for supporting vlan by means of linux soft bridge |
| RU2016146821A RU2669684C2 (en) | 2014-08-12 | 2015-08-07 | Method of vlan support with linux software bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410395046.8A CN104125128B (en) | 2014-08-12 | 2014-08-12 | Method for supporting VLAN (virtual local area network) by aid of Linux soft bridge |
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| CN104125128A true CN104125128A (en) | 2014-10-29 |
| CN104125128B CN104125128B (en) | 2017-04-12 |
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| CN (1) | CN104125128B (en) |
| RU (1) | RU2669684C2 (en) |
| WO (1) | WO2016023443A1 (en) |
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| CN104410559A (en) * | 2014-12-18 | 2015-03-11 | 武汉长光科技有限公司 | A method for achieving multiple routing and bridging of home gateway using single network bridge |
| CN105227424A (en) * | 2015-10-20 | 2016-01-06 | 成都广达新网科技股份有限公司 | A kind of EOC local side is by the method and system of cascade bridge virtual interface |
| CN105245431A (en) * | 2015-11-10 | 2016-01-13 | 上海斐讯数据通信技术有限公司 | VLAN (Virtual Local Area Network) implementation method and VLAN system based on Lunix system |
| WO2016023443A1 (en) * | 2014-08-12 | 2016-02-18 | 烽火通信科技股份有限公司 | Method for supporting vlan by means of linux soft bridge |
| CN106656815A (en) * | 2015-10-30 | 2017-05-10 | 阿里巴巴集团控股有限公司 | Virtual network message processing method and device |
| CN107566238A (en) * | 2017-08-30 | 2018-01-09 | 成都安恒信息技术有限公司 | A kind of method of User space configuration physical interface automatic identification vlan frames and non-vlan frames |
| CN110401923A (en) * | 2019-04-19 | 2019-11-01 | 广州天链通信科技有限公司 | A kind of method and VSAT terminal of VSAT terminal bridge and routing mode support simultaneously |
| CN111917626A (en) * | 2020-08-14 | 2020-11-10 | 上海中兴易联通讯股份有限公司 | Centralized forwarding method for Wlan AC service data and electronic equipment |
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| WO2016023443A1 (en) * | 2014-08-12 | 2016-02-18 | 烽火通信科技股份有限公司 | Method for supporting vlan by means of linux soft bridge |
| CN104410559A (en) * | 2014-12-18 | 2015-03-11 | 武汉长光科技有限公司 | A method for achieving multiple routing and bridging of home gateway using single network bridge |
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| CN107566238A (en) * | 2017-08-30 | 2018-01-09 | 成都安恒信息技术有限公司 | A kind of method of User space configuration physical interface automatic identification vlan frames and non-vlan frames |
| CN110401923A (en) * | 2019-04-19 | 2019-11-01 | 广州天链通信科技有限公司 | A kind of method and VSAT terminal of VSAT terminal bridge and routing mode support simultaneously |
| CN110401923B (en) * | 2019-04-19 | 2021-08-10 | 广州天链通信科技有限公司 | Method for simultaneously supporting VSAT terminal network bridge and routing mode and VSAT terminal |
| CN111917626A (en) * | 2020-08-14 | 2020-11-10 | 上海中兴易联通讯股份有限公司 | Centralized forwarding method for Wlan AC service data and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016023443A1 (en) | 2016-02-18 |
| RU2016146821A (en) | 2018-09-13 |
| RU2016146821A3 (en) | 2018-09-13 |
| RU2669684C2 (en) | 2018-10-12 |
| CN104125128B (en) | 2017-04-12 |
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