文档介绍：华中科技大学
硕士学位论文
较宽适应性IP报文业务分类系统设计
姓名:蒋少东
申请学位级别:硕士
专业:通信与信息系统
指导教师:刘玉
20070205
摘要
面对日益剧增的网络流量,网络应用层分析统计和应用层 QoS 愈发重要,本文
在分析了 TCP/IP 层次划分、常见应用协议交互特征和路由器及 QoS 基本机制的基础
上, 对路由器 IP 报文业务分类系统进行了研究,具有较大的实用价值。
首先分析了 TCP/IP 协议基础和几种常见应用协议的交互特征,从中提取出可用
来进行协议识别的特征信息,作为后续识别系统和识别方法的设计基础。
在分析了 IP 报文协议层次划分的基础上,提出了基于单步处理的识别设想,在
分析路由器特殊需求的基础上,提出了核心识别和特殊需求相分离的设想,并以此
为出发点设计了较宽适应性 IP 报文业务分类系统。
在研讨分类系统时,着重介绍了其中较关键的会话信息维护、定时器处理和传
输层头部处理等核心设计,这些模块的设计和运行方式与传统的网络流分析有较大
差别,比较适用于报文业务分类,具有较宽适应性和相对高的效率。
根据分析出的协议识别特征和所设计的报文分类系统,提出了几种常见的应用
协议的识别方法,验证了识别系统的功能和宽适应性,并从这些方法中分析提取出
协议识别的常用手段,并初步尝试动态扩充协议的识别能力。
对于所设计的系统,做了大量的功能和性能实验,并给出了部分测试数据。该
系统已在路由器上实际应用并取得了较好的效果。

关键词:IP 报文应用层识别宽适应性服务质量
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Abstract
For the more and more rapidly growth of the flux, network analyzing and
statistic in application layer and QoS in application layer es more important, this
thesis analyzed the TCP/IP layer structure, common application protocol packets exchange
and the principle of router and QoS, based on these analysis, do research of IP packet
classification in application layer on router and it has much practical value.
This thesis analyzed the foundation of the TCP/IP protocol and characteristics of
mon application protocols, through the analysis the author have got more
information for protocol recognition, and it is the base of the design of recognition system
and recognition method.
Through the analysis of IP packet level structure, the author gives assumption based
on single step process, based on the analysis of special demand of routers, gives the idea
of making special function separate from the core function of recognition, and designed a
rather wide-adapted IP packet recognition system.
For the recognition system, this thesis give a emphasis introduction of Session
maintenance, timer process, process on transport layer,etc,it's adapted to the recognition
system, and can be rather wide-adapted and have high paratively.
Based on the c