CN102143164A - Message relaying method, message relaying device and base station - Google Patents
Message relaying method, message relaying device and base station Download PDFInfo
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Abstract
The invention discloses a message relaying method, a message relaying device and a base station. The message relaying method comprises the following steps: the base station is configured as a relaying base station; the relaying base station is used to forward a DHCP (dynamic host configuration protocol) message between a DHCP server and a client-side device. The technical scheme provided by the invention solves the problem in the prior art that when a DHCP client side and a DHCP server end are in different subnetworks or VLANs, the client-side device cannot acquire an IP address for configuration through the DHCP message because the router for connecting the DHCP client side and the DHCP server does not support the Relay function or disallows to set the Relay function, so that the client-side device can acquire the IP address for configuration through the DHCP message, and the user experience is effectively improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of message relay method, device and base station.
Background technology
The predecessor of DHCP (Dynamic Host Configuration Protocol abbreviates DHCP as) is the BOOTP agreement.The running of agreement is divided into two ends: server end (DHCP Server) and client (DHCP Client).Client disposes to the server end request by sending the DHCP message, after server receives message, the configuration of distributing to client is sent to client by response message, and these configuration parameters can include but not limited to: information such as IP address, subnet mask and gateway.
VLAN (Virtual Local Area Network abbreviates VLAN as) is a kind of physical network to be divided into the technology of a plurality of logical local networks (LAN), and each VLAN has a LAN ID symbol (VLAN ID).Utilize vlan technology, network manager can be divided into different broadcast domain (the corresponding broadcast domain of each VLAN) to the user logic in the same physical LAN according to the practical application needs, makes the user with identical services be in same broadcast domain.Each VLAN is logically just as a local area network (LAN) independently, with physically LAN identical attribute arranged.All broadcasting and unicast traffic among the same VLAN all are limited among this VLAN and can be forwarded among other VLAN.When the equipment of different VLAN will communicate, must be through three layers routing forwarding.
If in network topology, when dhcp client is in different subnets with the Dynamic Host Configuration Protocol server end, and the router that connects dhcp client and server end is not supported DHCP Relay or when not allowing to dispose the Relay function, the broadcasting packet of client just can't arrive server end by router so, and client just can't be obtained the IP address configuration information by the DHCP agreement.
If in network topology, when dhcp client is in different VLAN with the Dynamic Host Configuration Protocol server end, and the router that connects client and server end is not supported DHCP relay (Relay) or when not allowing to dispose the Relay function, client also can't be obtained the IP address configuration by the DHCP agreement.
Summary of the invention
At in the correlation technique when dhcp client is in different subnets or VLAN with the Dynamic Host Configuration Protocol server end, because connecting the router of dhcp client and Dynamic Host Configuration Protocol server does not support the Relay function or does not allow to dispose the Relay function, cause client device can't obtain the problem of IP address configuration by the DHCP message, the invention provides a kind of message relay method, device and base station, one of to address the above problem at least.
According to an aspect of the present invention, provide a kind of message relay method.
Message relay method according to the present invention comprises: dispose a base station as relay base station; Adopt the relay base station of configuration between Dynamic Host Configuration Protocol server and client device, to E-Packet.
According to a further aspect in the invention, provide a kind of message relay device.
Message relay device according to the present invention comprises: configuration module is used to dispose relay function; Trunk module is used to adopt relay function to E-Packet between Dynamic Host Configuration Protocol server and client device.
According to another aspect of the invention, provide a kind of base station.
Base station according to the present invention comprises: above-mentioned message relay device.
By the present invention, adopt a base station to come DHCP message between relaying client device and the Dynamic Host Configuration Protocol server, solved in the correlation technique when dhcp client is in different subnets or VLAN with the Dynamic Host Configuration Protocol server end, because connecting the router of dhcp client and Dynamic Host Configuration Protocol server does not support the Relay function or does not allow to dispose the Relay function, cause client device can't obtain the problem of IP address configuration by the DHCP message, and then make client device obtain the IP address configuration by the DHCP message, effectively improved user experience.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the Organization Chart according to the residing system of relay base station of the embodiment of the invention;
Fig. 2 is the flow chart according to the message relay method of the embodiment of the invention;
Fig. 3 is the flow chart of relay base station relaying dhcp client message according to the preferred embodiment of the invention;
Fig. 4 is the flow chart of relay base station relaying Dynamic Host Configuration Protocol server end message according to the preferred embodiment of the invention;
Fig. 5 is that relay base station makes up the flow chart of MAC-VLAN corresponding relation according to the preferred embodiment of the invention;
Fig. 6 is the structured flowchart according to the message relay device of the embodiment of the invention;
Fig. 7 is the structured flowchart of message relay device according to the preferred embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Fig. 1 is the Organization Chart according to the residing system of relay base station of the embodiment of the invention.As shown in Figure 1, this system mainly comprises: Dynamic Host Configuration Protocol server (Server), BSC, client device (base station (Base Transceiver Station abbreviates BTS as) 1, BTS 2), relay base station (DHCP Relay) and router and switch.
As shown in Figure 1, as base station sub-system (Base Station Systems, abbreviate BSS as) network element client device (BTS1 or BTS 2) and DHCP Server between when being in different subnets or different VLAN, DHCP Server can't receive the broadcasting packet of client device, and BTS just can't obtain the network ip address configuration by the DHCP message so.
But the relay base station (DHCP Relay) shown in employing Fig. 1 leads to come the DHCP message between relaying client device and the Dynamic Host Configuration Protocol server, can make BTS obtain the network ip address configuration by the DHCP message.Be described below in conjunction with Fig. 2.
Fig. 2 is the flow chart according to the message relay method of the embodiment of the invention.As shown in Figure 2, this message relay method comprises following processing:
Step S202: dispose a base station as relay base station;
Wherein, be that route can reach between this relay base station and the Dynamic Host Configuration Protocol server.
Step S204: adopt the relay base station of configuration between DHCP (DHCP) server and client side equipment, to E-Packet.
In said method, adopt a base station to come message between relaying client device and the Dynamic Host Configuration Protocol server, solved in the correlation technique owing to the router that connects dhcp client and Dynamic Host Configuration Protocol server is not supported the Relay function or do not allowed to dispose the Relay function, cause client device can't obtain the problem of IP address configuration by the DHCP message, and then make client device obtain the IP address configuration by the DHCP message, effectively improved user experience.
Wherein, dispose a base station as relay base station, can include but not limited to following processing: opening or closing DHCP Relay on certain interface, on the VLAN of this interface configuration or all VLAN, transmitting the IP address of DHCP message, DHCPServer and to the route of DHCP Server.
Preferably, among the step S204, relay base station E-Packets between Dynamic Host Configuration Protocol server and client device and may further include following processing:
(1) relay base station receives first message that comes from client device, and wherein, first message carries the MAC Address of client device;
(2) the residing VLAN of relay base station study client device;
(3) relay base station makes up corresponding relation according to MAC Address of carrying in first message and the residing VLAN of client device;
(4) relay base station makes up new message and is sent to Dynamic Host Configuration Protocol server, wherein, is filled with the IP address information of relay base station in this message.
Below in conjunction with Fig. 3 above-mentioned preferred implementation is described.
Fig. 3 is the flow chart of relay base station relaying dhcp client message according to the preferred embodiment of the invention.As shown in Figure 3, relay base station relaying dhcp client message may further include following processing:
Step S302: the message that receives client device from No. 67 ports of UDP;
Step S304: judge whether the type of message in the UDP message is Bootp Request, if, execution in step S306, otherwise, execution in step S314;
Step S306: determine to enter dhcp client message relay handling process;
Step S308: Hop and Sec field according to message judge whether this message is legal, if, execution in step S310, otherwise flow process finishes;
Step S310: learn the residing VLAN of this client device;
In specific implementation process, relay base station can be according to the corresponding relation of MAC Address of carrying in the above-mentioned message and the residing VLAN structure of client device MAC-VLAN.
Step S312: the DHCP message that structure is a new, directly copy the user load of original message and new message is forwarded to DHCP Server, wherein, be filled with the IP address information of relay base station in this message.
Step S314: judge whether the type of message in the UDP message is Bootp Reply, if, execution in step S316, otherwise flow process finishes;
Step S316: determine to enter Dynamic Host Configuration Protocol server end message relay handling process.
Preferably, among the step S204, relay base station E-Packets between Dynamic Host Configuration Protocol server and client device and may further include following processing:
(1) relay base station receives second message that comes from the dynamic host configuration protocol DHCP server, and wherein, second message carries the media access control MAC address of client device;
(2) relay base station is searched the VLAN corresponding with the MAC Address of client device in corresponding relation;
(3) relay base station makes up new message and is sent to client device, wherein, is filled with corresponding VLAN in this message.
Below in conjunction with Fig. 4 above-mentioned preferred implementation is described.
Fig. 4 is the flow chart of relay base station relaying Dynamic Host Configuration Protocol server end message according to the preferred embodiment of the invention.As shown in Figure 4, this relay base station relaying Dynamic Host Configuration Protocol server end message mainly comprises following processing:
Step S402: the message that receives Dynamic Host Configuration Protocol server from No. 67 ports of UDP;
Step S404: judge whether the type of message in the UDP message is Bootp Request, if, execution in step S406, otherwise, execution in step S422;
Step S406: determine to enter Dynamic Host Configuration Protocol server end message relay handling process;
Step S408: Hop and Sec field according to message judge whether this message is legal, if, execution in step S410, otherwise flow process finishes;
Step S410: the MAC Address by the client device that carries in the message is searched the original vlan of this dhcp client equipment, if can find, and execution in step S412 then, otherwise directly abandon this message, flow process finishes;
Step S412: the DHCP message that structure is a new;
Step S414: whether the original vlan of judging client device is effective, if, execution in step S416, otherwise, execution in step S418;
Step S416: in the MAC of message head, fill the original vlan of client, afterwards, execution in step S420;
Step S418: in the MAC of message head, fill the original vlan of client, afterwards, execution in step S420;
Step S420: send this new DHCP message to client device.
Step S422: judge whether the type of message in the UDP message is Bootp Request, if, execution in step S424, otherwise flow process finishes;
Step S424: determine to enter dhcp client message relay handling process.
By Fig. 3 and Fig. 4 as can be known, after relay base station receives message, can also comprise following processing:
(1) relay base station is determined to E-Packet to client device or Dynamic Host Configuration Protocol server according to the type of the message that receives, that is, enter dhcp client message relay handling process or enter Dynamic Host Configuration Protocol server message relay handling process.
(2) if relay base station is judged according to the field of the message that receives and the legitimacy of this message illegal, is then directly abandoned this message.
By validity decision operation, the effectively fail safe of enhanced system.
Mentioning relay base station above can be according to the corresponding relation of MAC Address of carrying in the above-mentioned message and the residing VLAN structure of client device MAC-VLAN.Preferably, after relay base station makes up corresponding relation, can also comprise following processing: relay base station is with the form storage corresponding relation of Hash (HASH) table, and wherein, the MAC Address with client device in the HASH table is a major key.
Below in conjunction with Fig. 5 the preferred implementation that relay base station makes up the MAC-VLAN corresponding relation is described.
Fig. 5 is that relay base station makes up the flow chart of MAC-VLAN corresponding relation according to the preferred embodiment of the invention.As shown in Figure 5, relay base station structure MAC-VLAN corresponding relation mainly comprises following processing:
Step S502: the message that receives dhcp client equipment from No. 67 ports of UDP;
Step S504: the MAC Address of the user in the analytic message;
Step S506: the MAC Address at the user is calculated the HASH index value;
Step S508: judge whether this HASH index value is effective, if, execution in step S510, otherwise flow process finishes;
Step S510: the MAC Address of under the corresponding index of HASH table, searching this user;
Step S512: judge whether this MAC exists, if, execution in step S514, otherwise, execution in step S516;
Step S514: more VLAN in the new record and timestamp;
Step S516: construct new corresponding relation, and this corresponding relation is added in the HASH table.
In preferred implementation process, after relay base station is stored above-mentioned corresponding relation, can also comprise following processing: judge one by one whether the duration that corresponding relation upgrades in the HASH table surpasses threshold value; If the duration that a corresponding relation in the corresponding relation upgrades surpasses threshold value, then delete this corresponding relation.
For example, HASH can be set show overtime detection timer, whether overtime HASH show overtime detection timer expiry with regard to the operation of detection trigger HASH clauses and subclauses.If the Hash table for empty, just directly withdraws from testing process; Otherwise with regard to all clauses and subclauses (being corresponding relation) in the searching loop Hash table, judge one by one whether the duration that corresponding relation upgrades is overtime, if overtimely just delete this node, overtimely just do not skip this node and judge that next node is up to finishing traversal Hash table if having.
By above-mentioned processing, can effectively reduce information storage unnecessary in the relay base station internal memory, thereby save system resource.
Preferably, first message is that DHCP finds message, and second message provides message for DHCP; Perhaps first message is the DHCP request message, and second message is the dhcp response message.
Below in conjunction with an above-mentioned preferred implementation of example.
Example
At first the mode by craft disposes a base station and allows this base station and BSC connect on network, then this base station is used as DHCP RelayAgent (being above-mentioned relay base station) and is moved on network.
Do not know the IP address of DHCP Server during client terminal start-up, so find DHCP Server by the mode that sends the DHCP Discovery message of broadcasting.
Receive after DHCP finds (Discovery) message as the base station (being relay base station) of Relay, elder generation learns the residing VLAN of this dhcp client automatically and is kept in the internal memory, make up a new DHCP message then, fill the IP address of DHCPRelayAgent, the Hop field in the modification message, message is sent to DHCP Server (server).
After DHCP Server received this message, will reply a DHCP provided (Offer) message to give DHCP Relay.After DHCPRelay receives this message, search the residing VLAN of client,, just this VLAN is filled in the MAC head, and send to client device by the mode of broadcasting if find according to the MAC Address of the client in the message load.If do not find, directly abandon this message.
After client receives the DHCP offer message of server acknowledge, send broadcasting DHCP request (Request) message, this message of relaying is continued according to the mode of handling DHCP Discovery message in the base station of Relay, and this message is sent to DHCPServer.
After DHCP Server transmission dhcp response (ACK) message receives this message for client and client, client just can be obtained the IP address configuration, the DHCP data of subsequent client and server end all is a unicast message, can transmit by router.The work of Relay is finished at this point.
It should be noted that in the above-mentioned processing procedure that if client device can provide (Offer) message to obtain the IP address configuration according to DHCP, then client device need not to broadcast DHCP request (Request) message, flow process leaves it at that.
Fig. 6 is the structured flowchart according to the message relay device of the embodiment of the invention.As shown in Figure 6, this message relay device comprises:
Configuration module 60 is used to dispose relay function;
Trunk module 62 is connected with configuration module 60, is used to adopt above-mentioned relay function to E-Packet between Dynamic Host Configuration Protocol server and client device.
The trunk module relaying client device of said apparatus and the DHCP message between the Dynamic Host Configuration Protocol server, solved in the correlation technique owing to the router that connects dhcp client and Dynamic Host Configuration Protocol server is not supported the Relay function or do not allowed to dispose the Relay function, cause client device can't obtain the problem of IP address configuration by the DHCP message, and then make client device obtain the IP address configuration by the DHCP message, effectively improved user experience.
Preferably, as shown in Figure 7, trunk module 62 may further include: first receiving element 620, be used to receive first message that comes from client device, and wherein, first message carries the MAC Address of client device; Unit 622 is used to learn the residing VLAN of client device; Construction unit 624 is connected with unit 622 with first receiving element 620 respectively, and the MAC Address and the residing VLAN of client device that are used for carrying according to first message make up corresponding relation; First transmitting element 626 is connected with construction unit 624, is used to make up new message and is sent to Dynamic Host Configuration Protocol server, wherein, is filled with the IP address information of relay base station in this message.
Preferably, as shown in Figure 7, above-mentioned trunk module also comprises: memory cell 634, be connected with construction unit 624, and be used for form storage corresponding relation with the HASH table, wherein, the MAC Address with client device in the HASH table is a major key.Judging unit 636 is connected with memory cell 634, is used for judging one by one whether the duration that HASH table corresponding relation upgrades surpasses threshold value; Processing unit 638 is connected with judging unit 636, when being used for duration that a corresponding relation at corresponding relation upgrades and surpassing threshold value, deletes this corresponding relation.
Preferably, as shown in Figure 7, trunk module 62 may further include: second receiving element 628, be used to receive second message that comes from Dynamic Host Configuration Protocol server, and wherein, second message carries the media access control MAC address of client device; Search unit 630, be connected, be used for searching MAC Address corresponding virtual local area network (LAN) VLAN with client device at the corresponding relation of the MAC Address of above-mentioned structure and VLAN with memory cell 634; Second transmitting element 632 and is searched unit 630 and is connected, and is used to make up new message and is sent to client device, wherein, is filled with corresponding VLAN in the new message.
Preferably, as shown in Figure 7, above-mentioned trunk module also comprises: determining unit 640, be connected with second receiving element 628 with first receiving element 620 respectively, and be used for determining to E-Packet to client device or Dynamic Host Configuration Protocol server according to the type of the message that receives; Validity decision unit 642 is connected with determining unit 640, is used for judging according to the field of the message that receives the legitimacy of this message.
Preferably, above-mentioned first message is that DHCP finds message, and above-mentioned second message provides message for DHCP; Perhaps above-mentioned first message is the DHCP request message, and above-mentioned second message is the dhcp response message.
It should be noted that the preferred implementation that each module in the above-mentioned message relay device and each unit mutually combine specifically can repeat no more referring to the description of Fig. 2 to Fig. 5 and above-mentioned example herein.
In preferred implementation process, above-mentioned any message relay device can be arranged in the base station.
In sum, by the foregoing description provided by the invention, when base station system and server end are in different subnets or different VLAN, use the another one base station to come the broadcasting DHCP message between the relaying client and server end and the mode of self study client original vlan, make client obtain configuration, effectively improved user experience by using the DHCP agreement.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a message relay method is characterized in that, comprising:
Dispose a base station as relay base station;
Adopt the relay base station of described configuration between dynamic host configuration protocol DHCP server and client side equipment, to E-Packet.
2. method according to claim 1 is characterized in that, described relay base station E-Packets between described Dynamic Host Configuration Protocol server and client device and comprises:
Described relay base station receives first message that comes from described client device, and wherein, described first message carries the MAC Address of described client device;
Described relay base station is learnt the residing VLAN of described client device;
Described relay base station makes up corresponding relation according to MAC Address of carrying in described first message and the residing VLAN of described client device;
Described relay base station makes up new message and is sent to described Dynamic Host Configuration Protocol server, wherein, is filled with the IP address information of described relay base station in this message.
3. method according to claim 2, it is characterized in that described relay base station makes up after the described corresponding relation, also comprises: described relay base station is stored described corresponding relation with the form of Hash HASH table, wherein, the MAC Address with described client device is a major key in the described HASH table.
4. method according to claim 3 is characterized in that, described relay base station is stored after the described corresponding relation, also comprises:
Judge one by one whether the duration that corresponding relation upgrades described in the described HASH table surpasses threshold value;
If the duration that a corresponding relation in the described corresponding relation upgrades surpasses threshold value, then delete this corresponding relation.
5. method according to claim 3 is characterized in that, described relay base station E-Packets between described Dynamic Host Configuration Protocol server and client device and comprises:
Relay base station receives second message that comes from the dynamic host configuration protocol DHCP server, and wherein, described second message carries the media access control MAC address of client device;
Described relay base station is searched the VLAN corresponding with the MAC Address of described client device in described corresponding relation;
Described relay base station makes up new message and is sent to described client device, wherein, is filled with the VLAN of described correspondence in this message.
6. method according to claim 5 is characterized in that, after described relay base station receives described first message or described second message, also comprises:
Described relay base station is determined to E-Packet to described client device or described Dynamic Host Configuration Protocol server according to the type of the message that receives;
Described relay base station is judged the legitimacy of this message according to the field of the described message that receives.
7. according to claim 5 or 6 described methods, it is characterized in that,
Described first message is that DHCP finds message, and described second message provides message for DHCP; Perhaps
Described first message is the DHCP request message, and described second message is the dhcp response message.
8. a message relay device is characterized in that, comprising:
Configuration module is used to dispose relay function;
Trunk module is used to adopt described relay function to E-Packet between dynamic host configuration protocol DHCP server and client side equipment.
9. device according to claim 8 is characterized in that, described trunk module comprises:
First receiving element is used to receive first message that comes from described client device, and wherein, described first message carries the MAC Address of described client device;
Unit is used to learn the residing VLAN of described client device;
Construction unit, the MAC Address and the residing VLAN of described client device that are used for carrying according to described first message make up corresponding relation;
First transmitting element is used to make up new message and is sent to described Dynamic Host Configuration Protocol server, wherein, is filled with the IP address information of described relay base station in this message.
10. device according to claim 9 is characterized in that, described trunk module also comprises:
Memory cell is used for storing described corresponding relation with the form of HASH table, and wherein, the MAC Address with described client device in the described HASH table is a major key.
Judging unit is used for judging one by one whether the duration that corresponding relation upgrades described in the described HASH table surpasses threshold value;
Processing unit when being used for duration that a corresponding relation at described corresponding relation upgrades and surpassing threshold value, is deleted this corresponding relation.
11. device according to claim 10 is characterized in that, described trunk module also comprises:
Second receiving element is used to receive second message that comes from described Dynamic Host Configuration Protocol server, and wherein, described second message carries the media access control MAC address of client device;
Search the unit, be used for searching MAC Address corresponding virtual local area network (LAN) VLAN with described client device at described corresponding relation;
Second transmitting element is used to make up new message and is sent to described client device, wherein, is filled with the VLAN of described correspondence in the described new message.
12. device according to claim 11 is characterized in that, described trunk module also comprises:
Determining unit is used for determining to E-Packet to described client device or described Dynamic Host Configuration Protocol server according to the type of the message that receives;
The validity decision unit is used for judging according to the field of the described message that receives the legitimacy of this message.
13. a base station is characterized in that, described base station comprises: as each described message relay device in the claim 8 to 12.
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| CN105991784B (en) * | 2015-02-06 | 2019-04-05 | 普天信息技术有限公司 | Mine base station automatic configuration system and method |
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| CN106878481A (en) * | 2016-12-30 | 2017-06-20 | 瑞斯康达科技发展股份有限公司 | A kind of Internet protocol IP address acquisition methods, device and system |
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