CN101170515A - A method, system and gateway device for processing packets - Google Patents
A method, system and gateway device for processing packets Download PDFInfo
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- CN101170515A CN101170515A CNA2007101952238A CN200710195223A CN101170515A CN 101170515 A CN101170515 A CN 101170515A CN A2007101952238 A CNA2007101952238 A CN A2007101952238A CN 200710195223 A CN200710195223 A CN 200710195223A CN 101170515 A CN101170515 A CN 101170515A
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Abstract
The invention provides a method, a system and equipment for processing a message, wherein, the method includes that: receiving a media access control (MAC) address request message delivered by user equipment, and then querying about whether an ARP item which is identical with the MAC address and the IP address of the user carried by the MAC address request message exists or not, and if not, screening the message delivered by the user. In this way, after determining the user equipment delivering the MAC address request message is a non-authorized user, the method can be used to screen the MAC address request messages delivered by the user equipment to gateway equipment in a given period, preventing the gateway equipment from repeatedly implementing the message processing, enhancing the processing efficiency of the gateway equipment, and also preventing the malicious attacks from the non-authorized users.
Description
Technical field
The present invention relates to the network communications technology, particularly a kind of processing method of message, system and gateway device.
Background technology
Address resolution protocol (ARP, Address Resolution Protocol) be to realize the media interviews control (MAC of IP address to Ethernet, Media Access Control) agreement of changing between the address, because communication between the Ethernet is to use MAC Address to come addressing, come addressing and be based on the IP address, finally all need to be encapsulated in the ethernet frame based on the MAC Address addressing based on the various packets of IP addressing of address and transmit based on the various application of TCP/IP.
DHCP (DHCP, Dynamic Host Configuration Protocol) is the agreement of a kind of dynamic-configuration IP address.When solving unauthorized user accesses network problem, usually ARP is used in combination with DHCP, Dynamic Host Configuration Protocol server mandate ARP function is specially: the ARP list item of preserving user equipment (UE) IP address and subscriber equipment MAC Address corresponding relation in the gateway device, this ARP list item is no longer by the gateway device dynamic learning, and be that the IP address of subscriber equipment dynamic assignment generates by Dynamic Host Configuration Protocol server, and, to be called authorized user through Dynamic Host Configuration Protocol server dynamic assignment IP address user equipment, to not be called unauthorized user through Dynamic Host Configuration Protocol server dynamic assignment IP address user equipment, for example, own configuring static IP address user equipment is exactly unauthorized user.
In the prior art, if gateway device has been enabled Dynamic Host Configuration Protocol server mandate ARP function, be that ARP list item that gateway device is preserved is that IP address according to the Dynamic Host Configuration Protocol server dynamic assignment generates, then the message processing procedure of gateway device is: subscriber equipment is in order to obtain the MAC Address of gateway device, send the MAC Address request message to gateway device, this MAC Address request message can be the ARP request message, it also can be network control message protocol (ICMP, Internet Control Message Protocol) heartbeat (Ping) message.Gateway device is after receiving the MAC Address request message of subscriber equipment, can be according to the user device IP address and the MAC Address of carrying in this MAC Address request message, inquire about in the ARP list item of self storing whether the ARP list item identical with MAC Address with this user device IP address is arranged, if, confirm that then this subscriber equipment is an authorized user, send correct response message to this subscriber equipment; If not, then abandon this MAC Address request message.
But, because after definite this subscriber equipment is unauthorized user, gateway device abandons the MAC Address request message of this subscriber equipment, this unauthorized user does not obtain response message then may continue to send the MAC Address request message, this will inevitably make gateway device repeat above-mentioned message processing procedure, has a strong impact on the treatment effeciency of gateway device.In case unauthorized user malicious attack continues to send a large amount of MAC Address request messages, then may cause the paralysis of gateway device.
Summary of the invention
The embodiment of the invention provides a kind of processing method of message, system and equipment, so that improve the treatment effeciency of gateway device, prevents malicious attack.
A kind of processing method of message, this method comprises:
After receiving the media interviews control MAC Address request message of subscriber equipment transmission, inquiry whether exist with described MAC Address request message in the consistent ARP list item of MAC Address and IP address of this subscriber equipment of carrying, if not, then shield this messages sent by user equipment.
A kind of system that handles message, this system comprises: gateway device and subscriber equipment;
Described gateway device, after being used to receive the MAC Address request message of described subscriber equipment transmission, inquiry whether exist with described MAC Address request message in the consistent ARP list item of MAC Address and IP address of the described subscriber equipment that carries, if not, then shield described messages sent by user equipment;
Described subscriber equipment is used for sending the MAC Address request message to described gateway device.
A kind of gateway device, this gateway device comprises: receiving element, query unit and message screen unit;
Described receiving element is used to receive the MAC Address request message that subscriber equipment sends;
Described query unit is used for inquiring about the consistent ARP list item of MAC Address and IP address that whether has this subscriber equipment that carries with described MAC Address request message, if not, then sends the errored response exercise notice;
Described message screen unit, receive described errored response exercise notice after, shield this messages sent by user equipment.
As can be seen from the above technical solutions, in the method that the embodiment of the invention provides, system and the equipment, after receiving the MAC Address request message of subscriber equipment transmission, inquiry whether exist with the MAC Address request message in this user's of carrying the consistent ARP list item of MAC Address and IP address, if not, then shield this subscriber equipment and send message.Just after having judged that the subscriber equipment that sends the MAC Address request message is unauthorized user, can shield this subscriber equipment by this method and send the MAC Address request message to gateway device more within a certain period of time, avoided gateway device to repeat the message processing procedure, improve the treatment effeciency of gateway device, also can prevent the malicious attack of unauthorized user.
Description of drawings
The method flow diagram that Fig. 1 provides for the embodiment of the invention;
The system flow chart that Fig. 2 provides for the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
The method that the embodiment of the invention provides mainly comprises: after receiving the MAC Address request message of subscriber equipment transmission, inquiry whether exist with the MAC Address request message in the consistent ARP list item of MAC Address and IP address of this subscriber equipment of carrying, if not, then shield this messages sent by user equipment.
Wherein, the MAC Address request message can be the ARP request message, also can be ICMP Ping message.In following examples, be that example is described all with the ARP request message.
The method flow diagram that Fig. 1 provides for the embodiment of the invention, in this embodiment, gateway device has been enabled DHCP and has been authorized the ARP function, and the ARP list item of preservation is to be that the IP address of subscriber equipment dynamic assignment generates by Dynamic Host Configuration Protocol server.The content of ARP list item is the corresponding relation between user device IP address and the MAC Address.As shown in Figure 1, this method mainly comprises:
Step 101: gateway device obtains the user device IP address and the MAC Address of carrying in this ARP request message after receiving the ARP request message of subscriber equipment transmission.
Source IP address that carries in the ARP request message that subscriber equipment sends and source MAC are user device IP address and the MAC Address that sends this message.
Step 102: gateway device searches whether there be the ARP list item consistent with user device IP address and MAC Address in the ARP list item, if exist, then execution in step 103, and if there is no, then execution in step 104.
Step 103: send correct arp response message to subscriber equipment, and upgrade other relevant information of this ARP list item.Process ends.
In this step, the existence ARP list item consistent with user device IP address and MAC Address in the ARP list item illustrates that then this subscriber equipment is an authorized user, and gateway device sends correct arp response message to subscriber equipment according to flow process of the prior art.
Wherein, if do not have this user's IP address or MAC Address in the ARP list item, perhaps, the source IP address and the source MAC that carry in IP address in the list item and MAC Address and the ARP request message are inconsistent, then be the ARP list item that does not exist user device IP address consistent with MAC Address in the ARP list item, promptly this subscriber equipment is a unauthorized user.
Other relevant information of this ARP list item that upgrades in this step can be ageing time, interface message of this ARP list item etc.
Step 104: gateway device is the errored response message of the MAC Address of this subscriber equipment to subscriber equipment transmission target MAC (Media Access Control) address and source MAC.Process ends.
In this step, there be not the ARP list item consistent in the ARP list item with user device IP address and MAC Address, illustrate that this subscriber equipment is a unauthorized user, at this moment, gateway device sends the errored response message of this subscriber equipment message of shielding to subscriber equipment, can adopt among this embodiment the MAC Address of this subscriber equipment mode, also can adopt the MAC Address that produces a mistake at random source MAC as the errored response message as the target MAC (Media Access Control) address and the source MAC of this errored response message.
After subscriber equipment receives this errored response message, subscriber equipment can generate the ARP list item of a mistake in this locality, the IP address of this ARP list item is the IP address of gateway device, but the MAC Address of this list item is the MAC Address of the MAC Address of subscriber equipment self or a mistake producing at random, and promptly this MAC Address is the MAC Address of a mistake.Like this, because subscriber equipment when sending message, need send message according to the content in the ARP list item of this locality, therefore, this subscriber equipment can't send message again to this gateway device in the ageing time of this ARP list item.
If mainly ask gateway device for the unauthorized user that prevents malicious attack frequently sends ARP, can preestablish a frequency threshold value, after the subscriber equipment that each judgement sends the ARP request message is unauthorized user, write down the number of times that this subscriber equipment sends the ARP request message, if the number of times of record reaches the frequency threshold value of setting, then send the errored response message to this subscriber equipment, if do not reach the frequency threshold value of setting, then can not send any response message to this subscriber equipment.Simultaneously, can set a timer, when timer then, with the record the number of times zero clearing.Can be used to prevent from frequently to send at short notice the influence that the ARP request message causes gateway device like this.
The system construction drawing that Fig. 2 provides for the embodiment of the invention, as shown in Figure 2, this system comprises: gateway device 200 and subscriber equipment 210.
Gateway device 200, after being used to receive the MAC Address request of subscriber equipment 210 transmissions, inquiry whether exist with the MAC Address request in the consistent ARP list item of MAC Address and IP address of the subscriber equipment 210 that carries, if not, then shield the message that subscriber equipment 210 sends.
Subscriber equipment 210 is used for sending the MAC Address request message to gateway device 200, receives the errored response message that gateway device 200 sends.
Wherein, gateway device 200 can comprise: receiving element 201, query unit 202 and message screen unit 203.
Receiving element 201 is used to receive the MAC Address request message that subscriber equipment 210 sends.
Query unit 202 is used for inquiring about the consistent ARP list item of MAC Address and IP address that whether has this subscriber equipment 210 that carries with the MAC Address request message, if not, then sends the errored response exercise notice.
Query unit 202 inquires the consistent ARP list item with the IP address of the MAC Address that does not have this subscriber equipment 210 that carries in the MAC Address request message, shows that then this subscriber equipment 210 is unauthorized users.
Message screen unit 203, receive the errored response exercise notice after, the message that shielding subscriber equipment 210 sends.
Wherein, message screen unit 203 can comprise: errored response generation unit 204 and packet sending unit 205.
Errored response generation unit 204 is used to generate the errored response message that target MAC (Media Access Control) address and source MAC are the MAC Address of subscriber equipment 210.
Packet sending unit 205 is used for the errored response message that errored response generation unit 204 generates is sent to subscriber equipment 210.
Further, gateway device 200 can also comprise: number of times record cell 206 and number of times judging unit 207.
Number of times record cell 206, be used to receive the errored response exercise notice after, the number of times of the MAC Address request message that recording user equipment 210 sends.
Number of times judging unit 207 is used to judge whether the number of times of number of times record cell 206 records reaches default frequency threshold value, if then send the errored response exercise notice to message screen unit 203.
Further, this gateway device 200 can also comprise: timer 2 08, be used to set the time that shields subscriber equipment 210, and when arriving setting-up time, send the zero clearings notice to number of times record cell 206.
Number of times record cell 206, be used to receive zero clearing notice after, the number of times zero clearing of the MAC Address request message that the subscriber equipment 210 of record is sent.
By above description as can be seen, in the method that the embodiment of the invention provides, system and the equipment, after receiving the MAC Address request message of subscriber equipment transmission, inquiry whether exist with the MAC Address request message in this user's of carrying the consistent ARP list item of MAC Address and IP address, if not, then shield this messages sent by user equipment.Just after having judged that the subscriber equipment that sends the MAC Address request message is unauthorized user, can utilize this method to shield this subscriber equipment and send the MAC Address request message to gateway device more within a certain period of time, avoided gateway device to repeat the message processing procedure, improve the treatment effeciency of gateway device, also can prevent the malicious attack of unauthorized user.
In addition, a kind of mode by setting regularly the time limit and transmission MAC Address request number of times being write down also is provided in the embodiment of the invention, when the record number of times of setting MAC Address request message in the time limit reaches setting threshold, send the errored response message of this subscriber equipment message of shielding to subscriber equipment, thereby prevent from frequently to send at short notice the harmful effect that the MAC Address request message causes gateway device.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. handle method of message for one kind, it is characterized in that this method comprises:
After receiving the media interviews control MAC Address request message of subscriber equipment transmission, inquiry whether exist with described MAC Address request message in the consistent ARP list item of MAC Address and IP address of this subscriber equipment of carrying, if not, then shield this messages sent by user equipment.
2. method according to claim 1 is characterized in that, described ARP list item is to utilize the dynamic host configuration protocol DHCP server to generate for the IP address of subscriber equipment dynamic assignment.
3. method according to claim 1 is characterized in that, this subscriber equipment of described shielding sends message and comprises: send the errored response message that target MAC (Media Access Control) address and source MAC are the MAC Address of described subscriber equipment to described subscriber equipment.
4. method according to claim 1, it is characterized in that, also comprised before this messages sent by user equipment of described shielding: whether the number of times of judging this subscriber equipment transmission MAC Address request message reaches default frequency threshold value, and the number of times of the MAC Address request message that this subscriber equipment is sent adds up, if sending the number of times of MAC Address request message, subscriber equipment reaches default frequency threshold value, then continue to carry out the step of described this messages sent by user equipment of shielding, do not reach default frequency threshold value if subscriber equipment sends the number of times of MAC Address request message, then do not send any response message to described subscriber equipment.
5. method according to claim 4 is characterized in that, this method also comprises: the time of default this subscriber equipment of shielding, if Preset Time then, the described subscriber equipment of record is sent the number of times zero clearing of MAC Address request message.
6. a system that handles message is characterized in that, this system comprises: gateway device and subscriber equipment;
Described gateway device, after being used to receive the MAC Address request message of described subscriber equipment transmission, inquiry whether exist with described MAC Address request message in the consistent ARP list item of MAC Address and IP address of the described subscriber equipment that carries, if not, then shield described messages sent by user equipment;
Described subscriber equipment is used for sending the MAC Address request message to described gateway device.
7. a gateway device is characterized in that, this gateway device comprises: receiving element, query unit and message screen unit;
Described receiving element is used to receive the MAC Address request message that subscriber equipment sends;
Described query unit is used for inquiring about the consistent ARP list item of MAC Address and IP address that whether has this subscriber equipment that carries with described MAC Address request message, if not, then sends the errored response exercise notice;
Described message screen unit, receive described errored response exercise notice after, shield this messages sent by user equipment.
8. gateway device according to claim 7 is characterized in that, described message screen unit comprises: errored response generation unit and packet sending unit;
Described errored response generation unit is used to generate the errored response message that target MAC (Media Access Control) address and source MAC are the MAC Address of described subscriber equipment;
Described packet sending unit is used for the errored response message that described errored response generation unit generates is sent to subscriber equipment.
9. gateway device according to claim 7 is characterized in that, this gateway device also comprises: number of times record cell and number of times judging unit;
Described number of times record cell, be used to receive described errored response exercise notice after, write down the number of times of the MAC Address request message that described subscriber equipment sends;
Described number of times judging unit is used to judge whether the number of times of described number of times recording unit records reaches default frequency threshold value, if then send described errored response exercise notice to described message screen unit.
10. gateway device according to claim 9 is characterized in that, this gateway device also comprises: timer, be used to set the time that shields described subscriber equipment, and when arriving setting-up time, send the zero clearing notice to described number of times record cell;
Described number of times record cell, be used to receive described zero clearing notice after, the number of times zero clearing of the MAC Address request message that the described subscriber equipment of record is sent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101952238A CN101170515B (en) | 2007-12-04 | 2007-12-04 | A method, system and gateway device for processing packets |
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| CN2007101952238A CN101170515B (en) | 2007-12-04 | 2007-12-04 | A method, system and gateway device for processing packets |
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| CN101170515A true CN101170515A (en) | 2008-04-30 |
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| WO2010111862A1 (en) * | 2009-04-01 | 2010-10-07 | 中兴通讯股份有限公司 | Method and system for realizing wireless application protocol gateway against malicious attacks |
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| CN101980496A (en) * | 2010-10-13 | 2011-02-23 | 华为数字技术有限公司 | Message processing method and system, exchange board and access server equipment |
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| CN1233135C (en) * | 2002-06-22 | 2005-12-21 | 华为技术有限公司 | Method for preventing IP address deceit in dynamic address distribution |
| JP4174392B2 (en) * | 2003-08-28 | 2008-10-29 | 日本電気株式会社 | Network unauthorized connection prevention system and network unauthorized connection prevention device |
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| CN101938533B (en) * | 2010-09-10 | 2015-04-01 | 中兴通讯股份有限公司 | Method and device for processing address resolution |
| CN101980496A (en) * | 2010-10-13 | 2011-02-23 | 华为数字技术有限公司 | Message processing method and system, exchange board and access server equipment |
| CN102857584B (en) * | 2011-06-28 | 2019-05-31 | 中兴通讯股份有限公司 | A kind of arp cache entry update method and equipment |
| CN102857584A (en) * | 2011-06-28 | 2013-01-02 | 中兴通讯股份有限公司 | Method and device for updating ARP (address resolution protocol) cache items |
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