CN105245629A - DHCP-based host communication method and device - Google Patents
DHCP-based host communication method and device Download PDFInfo
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- CN105245629A CN105245629A CN201510621619.9A CN201510621619A CN105245629A CN 105245629 A CN105245629 A CN 105245629A CN 201510621619 A CN201510621619 A CN 201510621619A CN 105245629 A CN105245629 A CN 105245629A
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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
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
Abstract
The invention provides a DHCP-based host communication method and a DHCP-based host communication device. The communication method comprises the steps as follows: a dynamic host configuration protocol DHCP server receives a first request message transmitted by a host, wherein the first request message is used for requesting the DHCP server to assign a network protocol IP address for the host; the DHCP server assigns a first IP address for the host, establishes and stores a corresponding relation between the first IP address and a multimedia access control MAC address of the host; the DHCP server transmits the first IP address and a first corresponding relation table to the host, wherein the first corresponding relation table contains corresponding relations, maintained by the DHCP server, between IP addresses and MAC addresses of other hosts in the same network segment as the host. Through adoption of the DHCP-based host communication method and the DHCP-based host communication device of the invention, the problem that the data could not reach a correct target host because a wrong MAC address is received due to a hostile attack in an existing broadcast enquiry mode is solved.
Description
Technical field
The present invention relates to computer network communication field, particularly relate to a kind of host communication method based on DHCP (DynamicHostConfigurationProtocol is called for short DHCP) and device.
Background technology
DHCP is applied in large-scale LAN environment, Main Function is concentrated management, distributing IP address, the main frame in network environment is made to obtain internet protocol address (InternetProtocolAddress dynamically, be called for short IP address), gateway Gateway address, the information such as domain name system (DomainNameSystem, be called for short DNS) server address.
In prior art, in DHCP, main frame communicates with destination host, multimedia control (the MediaAccessControl that the IP address needing to obtain destination host is corresponding, be called for short MAC) address to be to realize network service, at address resolution protocol (AddressResolutionProtocol, be called for short ARP) in, main frame adopts the mode of broadcast to inquire the MAC Address that the IP address of destination host is corresponding, the MAC Address of oneself is replied to main frame by destination host, and the MAC Address that main frame is replied according to destination host communicates with destination host.
But if having malicious attacker in the inquiry method of prior art, the meeting MAC Address that deliberately reply one is wrong is to main frame, and so now main frame adopts the MAC Address transmission data of mistake, and data cannot arrive correct destination host.
Summary of the invention
The invention provides a kind of host communication method based on DHCP and device, solve and there is malicious attack in existing broadcast inquiry mode and receive a wrong MAC Address, thus data cannot arrive the problem of correct destination host.
The invention provides a kind of host communication method based on DHCP, comprising:
The first request message that dynamic host configuration protocol DHCP server Receiving Host sends, described first request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Described Dynamic Host Configuration Protocol server is described host assignment the one IP address, sets up and stores the corresponding relation of the multimedia control MAC Address of a described IP address and described main frame;
Described Dynamic Host Configuration Protocol server sends a described IP address and the first mapping table to described main frame, comprises the IP address of other main frames and the corresponding relation of MAC Address of the described main frame place network segment that described Dynamic Host Configuration Protocol server is safeguarded in described first mapping table.
Alternatively, described Dynamic Host Configuration Protocol server also comprises after being described host assignment the one IP address:
Described Dynamic Host Configuration Protocol server determines that described main frame does not re-use a described IP address, then delete the corresponding relation of the MAC Address of a described IP address and described main frame.
Described Dynamic Host Configuration Protocol server determines that described main frame does not re-use a described IP address, then delete the corresponding relation of the MAC Address of a described IP address and described main frame, comprising:
Alternatively, described Dynamic Host Configuration Protocol server is according to the lease information of a described IP address, determine that the lease information of a described IP address expires, and do not receive described main frame send re-rent request, then delete the corresponding relation of the MAC Address of a described IP address and described main frame.
Alternatively, described Dynamic Host Configuration Protocol server also comprises after being described host assignment the one IP address:
If described Dynamic Host Configuration Protocol server receives the second request message that described main frame sends, described second request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Described Dynamic Host Configuration Protocol server is described host assignment the 2nd IP address, the corresponding relation of the multimedia control MAC Address of a described IP address and described main frame is revised as the corresponding relation of the MAC Address of described 2nd IP address and described main frame.
Alternatively, described Dynamic Host Configuration Protocol server, to after described main frame sends a described IP address and the first mapping table, also comprises:
The corresponding relation of the multimedia control MAC Address of a described IP address and described main frame adds in described first mapping table by described Dynamic Host Configuration Protocol server;
Described first mapping table is sent to other main frames by described Dynamic Host Configuration Protocol server.
Alternatively, described first mapping table is stored in and selects in OPTION field.
The invention provides a kind of host communication method based on DHCP, comprising:
Main frame sends the first request message to dynamic host configuration protocol DHCP server, and described first request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Described main frame receives an IP address and first mapping table of the transmission of described Dynamic Host Configuration Protocol server, the IP address of described host assignment that to be described Dynamic Host Configuration Protocol server be in a described IP address, comprises the IP address of other main frames and the corresponding relation of multimedia control MAC Address of the described main frame place network segment that described Dynamic Host Configuration Protocol server is safeguarded in described first mapping table;
Described main frame communicates with other main frames of the place network segment according to described first mapping table.
Alternatively, described main frame communicates with other main frames of the place network segment according to described first mapping table, comprising:
The MAC Address that the IP address of destination host to be communicated is corresponding whether is comprised in first mapping table described in described host query;
If there is the MAC Address corresponding with the IP address of described destination host, described main frame then adopts the MAC Address of the destination host inquired to communicate with described destination host.
Alternatively, described method also comprises: if there is not the MAC Address corresponding with the IP address of described destination host, and described main frame, by ARP mechanism, adopts the mode of broadcast to obtain the MAC Address of destination host.
The invention provides a kind of host communication device based on DHCP, comprising:
Receiver module, for the first request message that Receiving Host sends, described first request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Distribution module, for being described host assignment the one IP address, setting up and storing the corresponding relation of the multimedia control MAC Address of a described IP address and described main frame;
Sending module, for sending a described IP address and the first mapping table to described main frame, comprises the IP address of other main frames and the corresponding relation of MAC Address of the described main frame place network segment that described Dynamic Host Configuration Protocol server is safeguarded in described first mapping table.
The invention provides a kind of host communication device based on DHCP, comprising:
Sending module, for sending the first request message to dynamic host configuration protocol DHCP server, described first request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Receiver module, for receiving an IP address and first mapping table of the transmission of described Dynamic Host Configuration Protocol server, the IP address of described host assignment that to be described Dynamic Host Configuration Protocol server be in a described IP address, comprises the IP address multimedia control of other main frames and the corresponding relation of MAC Address of the described main frame place network segment that described Dynamic Host Configuration Protocol server is safeguarded in described first mapping table;
Communication module, for communicating with other main frames of the place network segment according to described first mapping table.
Host communication method based on DHCP provided by the invention and device, the message for request dispatching IP address that Dynamic Host Configuration Protocol server Receiving Host sends, Dynamic Host Configuration Protocol server is host assignment the one IP address, set up and store the corresponding relation of the MAC Address of an IP address and main frame, Dynamic Host Configuration Protocol server is by sending an IP address and first mapping table of above-mentioned distribution to main frame, the IP address of other main frames and the corresponding relation of MAC Address of the same network segment that Dynamic Host Configuration Protocol server is safeguarded is comprised in this first mapping table, make main frame when the MAC Address of query aim main frame, the each main frame of broadcast mode inquiry can not be adopted, but by inquiry first mapping table, thus obtain the MAC Address of destination host, to communicate with destination host, solve and there is malicious attack in existing broadcast inquiry mode and receive a wrong MAC Address, thus data cannot arrive the problem of correct destination host.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of the host communication method embodiment one that the present invention is based on DHCP;
Fig. 2 is the flow chart of the host communication method embodiment two that the present invention is based on DHCP;
Fig. 3 is the flow chart of the host communication method embodiment three that the present invention is based on DHCP;
Fig. 4 is the flow chart of the host communication method embodiment four that the present invention is based on DHCP;
Fig. 5 is the flow chart of the host communication device embodiment one that the present invention is based on DHCP;
Fig. 6 is the flow chart of the host communication device embodiment two that the present invention is based on DHCP.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The method that the embodiment of the present invention provides is applied in dynamic host configuration protocol DHCP network.DHCP is the procotol of a local area network (LAN), controls one section of IP address range by Dynamic Host Configuration Protocol server, just automatically can obtain IP address and the subnet mask of Dynamic Host Configuration Protocol server distribution when main frame logs in Dynamic Host Configuration Protocol server.Two main frames be connected on the Internet communicate each other, respective IP address must be had, because IP address resource is limited, broadband access operator distributes a fixing IP address cannot to each user, therefore adopts the user of DHCP mode to online to carry out interim address assignment.Namely, when subscriber's main station adds network, Dynamic Host Configuration Protocol server is interim from address pool distributes an IP address, and after subscriber's main station rolls off the production line, Dynamic Host Configuration Protocol server may give other main frames of reaching the standard grade afterwards this address assignment.Therefore can effectively save IP address, both ensure that network service, put forward again the utilization rate of higher ip address.
Fig. 1 is the flow chart of the host communication method embodiment one that the present invention is based on DHCP, and as shown in Figure 1, the method comprises:
The first request message that step 101:DHCP server Receiving Host sends, the first request message is host assignment procotol IP address for asking Dynamic Host Configuration Protocol server.
In this step, when main frame adds network, need to Dynamic Host Configuration Protocol server IP address requesting, now, the request Dynamic Host Configuration Protocol server that Dynamic Host Configuration Protocol server Receiving Host sends is the first request message of host assignment IP address.
Step 102:DHCP server is host assignment the one IP address, sets up and stores the corresponding relation of the multimedia control MAC Address of an IP address and main frame.
In this step, Dynamic Host Configuration Protocol server by current not by an IP address assignment separating to the main frame of this request, this method of salary distribution is dynamic assignment mode, namely Dynamic Host Configuration Protocol server specifies an IP address with time restriction to main frame, time expires or main frame clearly represents that when abandoning this address, this address can be used by other main frames.Dynamic Host Configuration Protocol server is set up in this locality and is stored the corresponding relation of an IP address and MAC Address simultaneously, its corresponding relation can carry out record by setting up a list, this list comprises two parts content, a part has distributed IP and the MAC corresponding relation of host address, and another part is the corresponding relation of IP and MAC of the crucial main frame that network manager adds.
Step 103:DHCP server sends an IP address and the first mapping table to main frame, comprises the IP address of other main frames and the corresponding relation of MAC Address of the main frame place network segment that Dynamic Host Configuration Protocol server is safeguarded in the first mapping table.
In this step, the IP address of other main frames of the same network segment that Dynamic Host Configuration Protocol server is safeguarded to the IP address that Dynamic Host Configuration Protocol server in main frame forwarding step 102 distributes and above-mentioned Dynamic Host Configuration Protocol server and the corresponding relation of MAC Address, this corresponding relation is stored in the first mapping table.Namely Dynamic Host Configuration Protocol server issues main frame when forward direction Dynamic Host Configuration Protocol server IP address requesting in the lump by separating the IP address of this network segment of adding to the corresponding relation of other host IP address of the same network segment and MAC Address and keeper and the corresponding relation of MAC Address.
Optionally, described first mapping table is stored in and selects in OPTION field.Wherein, OPTION field is an option in DHCP message, and this option is the field of variable length in DHCP message, contains partial charter party information, type of message etc. in OPTION option.Can comprise at most 255 OPTION in OPTION option, minimum is 1 OPTION.The IP address of the present embodiment and the corresponding relation of MAC Address are sent by the OPTION class that can customize.
The host communication method based on DHCP of the present embodiment, the message for request dispatching IP address that Dynamic Host Configuration Protocol server Receiving Host sends, Dynamic Host Configuration Protocol server is host assignment the one IP address, set up and store the corresponding relation of the MAC Address of an IP address and main frame, Dynamic Host Configuration Protocol server is by sending an IP address and first mapping table of above-mentioned distribution to main frame, the IP address of other main frames and the corresponding relation of MAC Address of the same network segment that Dynamic Host Configuration Protocol server is safeguarded is comprised in this first mapping table, make main frame when the MAC Address of query aim main frame, the each main frame of broadcast mode inquiry can not be adopted, but by inquiry first mapping table, thus obtain the MAC Address of destination host, to communicate with destination host, solve and there is malicious attack in existing broadcast inquiry mode and receive a wrong MAC Address, thus data cannot arrive the problem of correct destination host.
Further, after described Dynamic Host Configuration Protocol server is described host assignment the one IP address, also comprise: described Dynamic Host Configuration Protocol server determines that described main frame does not re-use a described IP address, then delete the corresponding relation of the MAC Address of a described IP address and described main frame.Concrete, after distributing an IP address a period of time, when main frame does not re-use an IP address of above-mentioned distribution, the corresponding relation of the described IP address in the first mapping table of Dynamic Host Configuration Protocol server deletion local maintenance and the MAC Address of main frame, thus upgrade this first mapping table.
Further, described Dynamic Host Configuration Protocol server determines that described main frame does not re-use a described IP address, then delete the corresponding relation of the MAC Address of a described IP address and described main frame, comprise: described Dynamic Host Configuration Protocol server is according to the lease information of a described IP address, determine that the lease information of a described IP address expires, and do not receive described main frame send re-rent request, then delete the corresponding relation of the MAC Address of a described IP address and described main frame.Concrete, the corresponding relation that above-mentioned Dynamic Host Configuration Protocol server deletes the MAC Address of a described IP address in the first mapping table and main frame specifically comprises, after distributing an IP address a period of time, Dynamic Host Configuration Protocol server is according to the lease information of an IP address, judge that the lease information of an IP address expires, and do not receive main frame re-rent request, just delete the corresponding relation of the MAC Address of an IP address and main frame, wherein, the lease information of above-mentioned lease information to be Dynamic Host Configuration Protocol server be an IP address of host assignment, this lease information comprises the time period etc. that main frame can use an IP address.
Further, after described Dynamic Host Configuration Protocol server is described host assignment the one IP address, also comprise: if described Dynamic Host Configuration Protocol server receives the second request message that described main frame sends, described second request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Described Dynamic Host Configuration Protocol server is described host assignment the 2nd IP address, the corresponding relation of the multimedia control MAC Address of a described IP address and described main frame is revised as the corresponding relation of the MAC Address of described 2nd IP address and described main frame.
Concrete, after distributing an IP address, if Dynamic Host Configuration Protocol server receives again the message of the IP address requesting that this main frame sends, then Dynamic Host Configuration Protocol server is this host assignment the 2nd IP address, and the corresponding relation of the MAC Address of the IP address of Dynamic Host Configuration Protocol server in the first mapping table of local maintenance and main frame is revised as the corresponding relation of the MAC Address of the 2nd IP address and main frame.
Fig. 2 is the flow chart of the host communication method embodiment two that the present invention is based on DHCP, and as shown in Figure 2, the method comprises:
The first request message that step 201:DHCP server Receiving Host sends, the first request message is host assignment procotol IP address for asking Dynamic Host Configuration Protocol server.
This step is identical with step 101 embodiment, repeats no more herein.
Step 202:DHCP server is host assignment the one IP address, sets up and stores the corresponding relation of the multimedia control MAC Address of a described IP address and described main frame.
This step is identical with step 102 embodiment, repeats no more herein.
Step 203:DHCP server sends an IP address and the first mapping table to main frame, comprises the IP address of other main frames and the corresponding relation of MAC Address of the main frame place network segment that Dynamic Host Configuration Protocol server is safeguarded in the first mapping table.
This step is identical with step 103 embodiment, repeats no more herein.
The corresponding relation of the MAC Address of the one IP address and main frame adds in the first mapping table by step 204:DHCP server.
In this step, Dynamic Host Configuration Protocol server will separate the IP address of this network segment of adding to the corresponding relation of the IP address of other main frames of the same network segment and MAC Address and keeper and the corresponding relation of MAC Address is issued after the main frame of forward direction Dynamic Host Configuration Protocol server IP address requesting, is added in the first mapping table by the corresponding relation of newly assigned IP address and MAC Address simultaneously.
First mapping table is sent to other main frames by step 205:DHCP server.
In this step, above-mentioned the first mapping table that with the addition of the corresponding relation of newly assigned IP address and MAC Address is sent to other main frames in the same network segment by Dynamic Host Configuration Protocol server.
The host communication method based on DHCP of the present embodiment, the message for request dispatching IP address that Dynamic Host Configuration Protocol server Receiving Host sends, Dynamic Host Configuration Protocol server is host assignment the one IP address, set up and store the corresponding relation of the MAC Address of an IP address and main frame, Dynamic Host Configuration Protocol server is by sending an IP address and first mapping table of above-mentioned distribution to main frame, the IP address of other main frames and the corresponding relation of MAC Address of the same network segment that Dynamic Host Configuration Protocol server is safeguarded is comprised in this first mapping table, further, by the corresponding relation of newly assigned IP address and MAC Address is added in the first mapping table, and the first mapping table is sent to other main frames, make other main frames when the MAC Address of query aim main frame, the each main frame of broadcast mode inquiry can not be adopted, but by inquiring about the first respective mapping table, thus obtain the MAC Address of destination host, to communicate with destination host, solve and there is malicious attack in existing broadcast inquiry mode and receive a wrong MAC Address, thus data cannot arrive the problem of correct destination host.
Fig. 3 is the flow chart of the host communication method embodiment three that the present invention is based on DHCP, and as shown in Figure 3, the method comprises:
Step 301: main frame sends the first request message to dynamic host configuration protocol DHCP server, the first request message is host assignment procotol IP address for asking Dynamic Host Configuration Protocol server.
In this step, main frame, to Dynamic Host Configuration Protocol server IP address requesting, sends the first solicited message particular by Dynamic Host Configuration Protocol server, and the first solicited message is this host assignment IP address for asking Dynamic Host Configuration Protocol server.
Step 302: main frame receives an IP address and first mapping table of Dynamic Host Configuration Protocol server transmission.
In this step, main frame receives an IP address and first mapping table of Dynamic Host Configuration Protocol server transmission.Wherein, the IP address of host assignment that to be Dynamic Host Configuration Protocol server be in an IP address, comprises the IP address of other main frames and the corresponding relation of MAC Address of the main frame place network segment that Dynamic Host Configuration Protocol server is safeguarded in the first mapping table.
Step 303: main frame communicates with other main frames of the place network segment according to the first mapping table.
In this step, when main frame needs to communicate with other main frames of the same network segment, by inquiring about this first mapping table, finding the MAC Address of destination host, thus communicating with destination host.
The host communication method based on DHCP of the present embodiment, main frame to Dynamic Host Configuration Protocol server IP address requesting, and receives an IP address and first mapping table of Dynamic Host Configuration Protocol server transmission.Wherein, the IP address of host assignment that to be Dynamic Host Configuration Protocol server be in the one IP address, the IP address of other main frames and the corresponding relation of MAC Address of the main frame place network segment that Dynamic Host Configuration Protocol server is safeguarded is comprised in first mapping table, thus make when main frame needs to communicate with other main frames of the same network segment, by inquiring about this first mapping table, find the MAC Address of destination host, thus communicate with destination host, solve and there is malicious attack in existing broadcast inquiry mode and receive a wrong MAC Address, thus data cannot arrive the problem of correct destination host.
Fig. 4 is the flow chart of the host communication method embodiment four that the present invention is based on DHCP, and as shown in Figure 4, the step 303 in embodiment three comprises:
Step 3031: whether comprise the MAC Address that the IP address of destination host to be communicated is corresponding in host query first mapping table.
In this step, MAC Address corresponding to the IP address that whether comprises destination host to be communicated inquired about by main frame in the first mapping table, if comprised, then performs step 3032, otherwise perform 3033.Wherein, the IP address of other main frames and the corresponding relation of MAC Address of the main frame place network segment that Dynamic Host Configuration Protocol server is safeguarded is comprised in this first mapping table.
Step 3032: if there is the MAC Address corresponding with the IP address of destination host, main frame then adopts the MAC Address of the destination host inquired to communicate with destination host.
In this step, if there is the MAC Address corresponding with the IP address of destination host in the first mapping table, then main frame is communicated with destination host by this MAC Address inquired.
Step 3033: if there is not the MAC Address corresponding with the IP address of destination host, main frame, by ARP mechanism, adopts the mode of broadcast to obtain the MAC Address of destination host.
In this step, if there is not the MAC Address corresponding with the IP address of destination host in the first mapping table, then main frame adopts existing ARP mechanism, adopts broadcast mode to obtain the MAC Address of destination host, thus communicates with destination host.
The host communication method based on DHCP of the present embodiment, when main frame needs to communicate with other main frames, by first inquiring about the first mapping table, judge whether there is the MAC Address corresponding with the IP address of destination host in the first mapping table, if existed, MAC Address then by inquiring communicates with destination host, otherwise by ARP mechanism, the mode of broadcast is adopted to obtain the MAC Address of destination host, thus reduce the probability that main frame adopts other host MAC address of ARP protocol inquiry same network segment, solve to a certain extent and there is malicious attack in existing broadcast inquiry mode and receive a wrong MAC Address, thus data cannot arrive the problem of correct destination host.
Fig. 5 is the flow chart of the host communication device embodiment one that the present invention is based on DHCP, as shown in Figure 5, comprising:
Receiver module 11, for the first request message that Receiving Host sends, described first request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Distribution module 12, for being described host assignment the one IP address, setting up and storing the corresponding relation of the multimedia control MAC Address of a described IP address and described main frame;
Sending module 13, for sending a described IP address and the first mapping table to described main frame, in described first mapping table, comprise the IP address of other main frames and the corresponding relation of MAC Address of the described main frame place network segment that described Dynamic Host Configuration Protocol server is safeguarded.
The host communication device based on DHCP of the present embodiment, the message for request dispatching IP address that Dynamic Host Configuration Protocol server is sent by receiver module Receiving Host, be host assignment the one IP address by distribution module, set up and store the corresponding relation of the MAC Address of an IP address and main frame, Dynamic Host Configuration Protocol server sends an IP address and first mapping table of above-mentioned distribution to main frame by sending module, the IP address of other main frames and the corresponding relation of MAC Address of the same network segment that Dynamic Host Configuration Protocol server is safeguarded is comprised in this first mapping table, make main frame when the MAC Address of query aim main frame, the each main frame of broadcast mode inquiry can not be adopted, but by inquiry first mapping table, thus obtain the MAC Address of destination host, to communicate with destination host, solve and there is malicious attack in existing broadcast inquiry mode and receive a wrong MAC Address, thus data cannot arrive the problem of correct destination host.
Fig. 6 is the flow chart of the host communication device embodiment two that the present invention is based on DHCP, as shown in Figure 6, comprising:
Sending module 21, for sending the first request message to dynamic host configuration protocol DHCP server, described first request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Receiver module 22, for receiving an IP address and first mapping table of the transmission of described Dynamic Host Configuration Protocol server, the IP address of described host assignment that to be described Dynamic Host Configuration Protocol server be in a described IP address, comprises the IP address multimedia control of other main frames and the corresponding relation of MAC Address of the described main frame place network segment that described Dynamic Host Configuration Protocol server is safeguarded in described first mapping table;
Communication module 23, for communicating with other main frames of the place network segment according to described first mapping table.
The host communication device based on DHCP of the present embodiment, main frame to Dynamic Host Configuration Protocol server IP address requesting, receives an IP address and first mapping table of Dynamic Host Configuration Protocol server transmission by sending module by receiver module.Wherein, the IP address of host assignment that to be Dynamic Host Configuration Protocol server be in the one IP address, the IP address of other main frames and the corresponding relation of MAC Address of the main frame place network segment that Dynamic Host Configuration Protocol server is safeguarded is comprised in first mapping table, thus make when main frame needs to communicate with other main frames of the same network segment, by inquiring about this first mapping table, find the MAC Address of destination host, thus communicate with destination host, solve and there is malicious attack in existing broadcast inquiry mode and receive a wrong MAC Address, thus data cannot arrive the problem of correct destination host.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that program command is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (11)
1. based on a host communication method of DHCP, it is characterized in that, comprising:
The first request message that dynamic host configuration protocol DHCP server Receiving Host sends, described first request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Described Dynamic Host Configuration Protocol server is described host assignment the one IP address, sets up and stores the corresponding relation of the multimedia control MAC Address of a described IP address and described main frame;
Described Dynamic Host Configuration Protocol server sends a described IP address and the first mapping table to described main frame, comprises the IP address of other main frames and the corresponding relation of MAC Address of the described main frame place network segment that described Dynamic Host Configuration Protocol server is safeguarded in described first mapping table.
2. method according to claim 1, is characterized in that, described Dynamic Host Configuration Protocol server also comprises after being described host assignment the one IP address:
Described Dynamic Host Configuration Protocol server determines that described main frame does not re-use a described IP address, then delete the corresponding relation of the MAC Address of a described IP address and described main frame.
3. method according to claim 2, is characterized in that, described Dynamic Host Configuration Protocol server determines that described main frame does not re-use a described IP address, then delete the corresponding relation of the MAC Address of a described IP address and described main frame, comprising:
Described Dynamic Host Configuration Protocol server, according to the lease information of a described IP address, determines that the lease information of a described IP address expires, and do not receive described main frame send re-rent request, then delete the corresponding relation of the MAC Address of a described IP address and described main frame.
4. method according to claim 1, is characterized in that, described Dynamic Host Configuration Protocol server also comprises after being described host assignment the one IP address:
If described Dynamic Host Configuration Protocol server receives the second request message that described main frame sends, described second request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Described Dynamic Host Configuration Protocol server is described host assignment the 2nd IP address, the corresponding relation of the multimedia control MAC Address of a described IP address and described main frame is revised as the corresponding relation of the MAC Address of described 2nd IP address and described main frame.
5. method according to claim 1, is characterized in that, described Dynamic Host Configuration Protocol server, to after described main frame sends a described IP address and the first mapping table, also comprises:
The corresponding relation of the multimedia control MAC Address of a described IP address and described main frame adds in described first mapping table by described Dynamic Host Configuration Protocol server;
Described first mapping table is sent to other main frames by described Dynamic Host Configuration Protocol server.
6. method according to claim 1, is characterized in that, described first mapping table is stored in be selected in OPTION field.
7. based on a host communication method of DHCP, it is characterized in that, comprising:
Main frame sends the first request message to dynamic host configuration protocol DHCP server, and described first request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Described main frame receives an IP address and first mapping table of the transmission of described Dynamic Host Configuration Protocol server, the IP address of described host assignment that to be described Dynamic Host Configuration Protocol server be in a described IP address, comprises the IP address of other main frames and the corresponding relation of multimedia control MAC Address of the described main frame place network segment that described Dynamic Host Configuration Protocol server is safeguarded in described first mapping table;
Described main frame communicates with other main frames of the place network segment according to described first mapping table.
8. method according to claim 7, is characterized in that, described main frame communicates with other main frames of the place network segment according to described first mapping table, comprising:
The MAC Address that the IP address of destination host to be communicated is corresponding whether is comprised in first mapping table described in described host query;
If there is the MAC Address corresponding with the IP address of described destination host, described main frame then adopts the MAC Address of the destination host inquired to communicate with described destination host.
9. method according to claim 8, is characterized in that, also comprises:
If there is not the MAC Address corresponding with the IP address of described destination host, described main frame, by ARP mechanism, adopts the mode of broadcast to obtain the MAC Address of destination host.
10. based on a host communication device of DHCP, it is characterized in that, comprising:
Receiver module, for the first request message that Receiving Host sends, described first request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Distribution module, for being described host assignment the one IP address, setting up and storing the corresponding relation of the multimedia control MAC Address of a described IP address and described main frame;
Sending module, for sending a described IP address and the first mapping table to described main frame, comprises the IP address of other main frames and the corresponding relation of MAC Address of the described main frame place network segment that described Dynamic Host Configuration Protocol server is safeguarded in described first mapping table.
11. 1 kinds based on the host communication device of DHCP, is characterized in that, comprising:
Sending module, for sending the first request message to dynamic host configuration protocol DHCP server, described first request message is described host assignment procotol IP address for asking described Dynamic Host Configuration Protocol server;
Receiver module, for receiving an IP address and first mapping table of the transmission of described Dynamic Host Configuration Protocol server, the IP address of described host assignment that to be described Dynamic Host Configuration Protocol server be in a described IP address, comprises the IP address multimedia control of other main frames and the corresponding relation of MAC Address of the described main frame place network segment that described Dynamic Host Configuration Protocol server is safeguarded in described first mapping table;
Communication module, for communicating with other main frames of the place network segment according to described first mapping table.
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