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Method and apparatus for processing DHCP message

A DHCP message and device technology, applied in the field of network communication, can solve the problem of being unable to prevent illegal users from attacking the DHCP server, and achieve the effect of solving the problem of being unable to prevent illegal users from attacking the DHCP server

Active Publication Date: 2013-11-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The embodiment of the present invention provides a method and device for processing DHCP messages to solve the security problem that the prior art cannot prevent illegal users from attacking the DHCP server

Method used

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  • Method and apparatus for processing DHCP message
  • Method and apparatus for processing DHCP message
  • Method and apparatus for processing DHCP message

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0029] The DHCP message format is as follows: figure 1 shown, where:

[0030] op: The operation type of the message, divided into request message and response message, 1 is the request message; 2 is the response message. The specific packet type is identified in the option field.

[0031] htype: hardware address type.

[0032] hlen: hardware address length. The system currently only supports Ethernet, and the hardware address length is fixed at 6.

[0033] hops: the number of DHCP relay agents that DHCP packets pass through. This field will increase by 1 each time the DHCP request message passes through a DHCP relay agent.

[0034] xid: A random n...

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PUM

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Abstract

The embodiment of the invention discloses a method and an apparatus for processing a dynamic host configuration protocol (DHCP) message. The method comprises the steps of receiving the DHCP message, examining the option carried by the DHCP message and filtering the DHCP message when the DHCP message carries a repeated option. According to the technical scheme provided by the invention, the safety problem that it is impossible to prevent an invalid user from attacking a DHCP server in the prior art is solved.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a method and equipment for processing DHCP messages. Background technique [0002] DHCP (Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol) is a communication protocol that manages and automatically assigns IP (Internet Protocol, network protocol) addresses, and works in a client-server (Client-Server) mode. [0003] DHCP client: It is the trigger and driver of the entire DHCP process. It interacts with the DHCP server through DHCP messages to obtain IP addresses and other network parameters. [0004] DHCP server: The provider of DHCP service interacts with DHCP clients through DHCP messages, assigns appropriate IP addresses to various types of clients, and assigns other network parameters to clients as required. [0005] In order for the DHCP client to dynamically obtain a legal IP address, it needs to go through the following stages: [0006] (1) Di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/70H04L29/12
Inventor 于斌张印熙
Owner HUAWEI TECH CO LTD