局域网飞鸽传书软件的设计与实现.doc
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局域网飞鸽传书软件的设计与实现.doc
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局域网飞鸽传书软件的设计与实现
摘要
网络通讯在当今已经不算新鲜事物,但大多数网络通讯都需要借助Internet上的服务器,这就给那些具有大规模内部网络的用户造成了许多问题,如浪费网络资源、遭遇到网络攻击、传播的病毒、破坏防御系统等等。
由于互连网上的网络通讯工具给企业内部信息交流带来了不便,所以为了方便内部网络的用户之间的沟通,需要开发一个基于局域网的信息收发系统的即时通讯工具,实现在内部网络中进行信息的交流。
本课题设计主要针对局域网通讯而开发设计的,采用的是C/S构架,类似飞鸽传书系统,来实现聊天、文件传输功能,并借助一些网络通讯组件,成功的实现了在局域网上的即时通讯。
本论文的目标是设计一个类似飞鸽传输的局域网通信软件,并分析它在其领域的优势。
本设计以C编写,能在windows2000/net/xp等环境下运行。
设计共分为五大模块,分别是:
首先,介绍选题背景及意义和国内外研究现状;其次,介绍TCP/IP点对点协议技术,C/S架构和SOCKET网络编程技术;再次,对当前局域网文件传输进行需求分析并提出解决方案;然后,根据解决方案对系统进行设计;最后,对工作计划统计以及分析系统进行测试并得到测试结果。
关键词:
聊天;传输;socket;飞鸽传书;C/S结构
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DesignandImplementationIPMessengerBasedonLAN
Abstract
Thenetworkcommunicationalreadydonotcalculatethenewthingsnow,butthemajoritynetworkcommunicationallneedtobesupportbytheserverontheInternet,thismaketheseuserhavethelarge-scaleinternalnetworkwhomanyproblems,suchaswastenetworkresources,beattackedbynetwork,disseminationvirus,destructiondefensesystemandsoon.Becausetheinterconnectionnetworkcommunicationfacilitiesontheinteriorcommunicationbroughtinconvenientlyfortheenterprise,inordertofacilitateinternalcommunicationbetweennetworkuser's,needstodeveloponebasedonthelocalofinstantmessageareanetworkinformationreceivinganddispatchingsysteminstantmessagefacilities,realizescarriesontheinformationwhichnetworktheexchange.Thistopicdesignmainlyaimsatthelocalareanetworkcommunicationtodevelopthedesign,usesistheC/Sskeleton,likeIPMessenger,forchatandfilestransmission.
LANagainstthetextchat,documentsandfolderstransmission,thedesignofafakeIPMessengerofLANsoftware,andanalyzeitintheirareasofadvantage.ThedesignisdevelopedbyCprogramitcanmakeinthecnvironmentofwindows2000/net/xpoftopicselection,intheenvironmentThedesignaltogetherdividesintofivebigmodules,respectivelyis:
First,introductionselectedtopicbackgroundandsignificanceanddomesticandforeignresearchpresentsituation;Second,introducestheTCP/IPpointtopointprotocoltechnology;C/Sconstructiontechniqueandsocktnetworkprogrammingtechnology;Third,carriesonthedemandofthecurrentlocalareanetworkfiletransfertoanalyzeandproposethesolution;Fourth,carriesonthedesignaccordingtothesolutiontothesystem;Fifth,statistictheworkplan,awalysandtestthesystemandobtainsthetestnesult.
Keywords:
Chat;transmission;socket;C/Sskeleton;IPMessenger
目录
论文总页数:
20页
1 引言 1
1.1课题背景 1
1.2本课题主要研究背景 1
1.3本课题主要研究思路和方法 1
1.4研究项目的目的以及意义 2
1.5WINSOCKET的寻址方式 2
2 系统需求分析 2
2.1系统设计目标 2
2.2系统总体需求分析 3
2.3组织结构的分析 3
2.3.1开发运行环境 3
2.3.2系统开发语言 4
3 理论知识 4
3.1C/S软件架构技术 4
3.2用户数据报协议(UDP) 4
3.3单播、广播、组播浅析 5
4 系统设计 5
4.1文字聊天模块的整体构架 5
4.2文件传输模块的主要流程图 6
4.3系统的主要功能模块 6
4.3.1文字聊天的主登录界面 6
4.3.2文字聊天信息的封装 9
4.3.3聊天信息的加锁 10
4.3.4文件传输的界面 12
4.3.5用户密封或加锁传输文件 15
5 系统测试 17
5.1测试环境 17
5.2测试结果 17
结论 17
参考文献 18
致谢 错误!
未定义书签。
声明 错误!
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1引言
1.1课题背景
当时间走向21世纪,当今时代也由工业经济渐渐成为了知识经济、信息经济的时代。
信息的需求量的不停增加,促使了计算机通信的日新月异!
虽然网络的使用频率与使用的范围都越来越广泛,但是人们使用的网络的用途主要的还是只有两个:
(1).相互之间的沟通,
(2).资源共享。
局域网作为网络的一个重要组成部分,它不但用户与外界连接的枢纽,同时也是近距离用户之间沟通与资源共享的一个重要途径。
在这种情况下,如何使局域网内的用户便捷的勾通,以及快速的资源共享,也就成为了人们对网络研究的重点之一。
本系统仿飞鸽传输,是一个局域网内的通迅工具,主要通过Winsockt完成。
它据有的功能有:
(1)局域网内用户间简单的文字聊天功能;
(2)局域网内用户间相互的文件、文件夹传输。
1.2本课题主要研究背景
随着计算机和通讯技术的发展,计算机的网络化已经渗透到各个应用领域,尤其是以TCP/IP协议之间的网络互连发展很快,计算机应用系统的开发由传统的单机方式转向到了网络环境的开发。
大部分编程语言都提供了基于Windows Sockets网络编程接口的Winsocket控件,它使开发TCP/IP通讯变得简单方便。
网络之间进行数据通讯时,使用地址来标识网络中的计算机,有了地址以后,数据才会准确地发送到地址所指向的计算机。
TCP/IP协议使用IP地址为网络中计算机的标识,而且每台计算机的IP地址是唯一的,一般情况下,每台计算机运行的程序不止一个,因此要在应用程序中建立连接的话,还需要一个地址标识。
在TCP/IP协议书中使用端口(PORT)作为计算机上运行的应用程序的标识,因此TCP/IP协议中一个有效的网络地址包括IP地址和端口地址两个部分。
TCP/IP协议提供了两种计算机之间的通讯方式:
TCP方式和UDP方式。
TCP是一种面向连接的服务,在文件传输时会先行建立连接,通过链接提供
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- 关 键 词:
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