回l个inux下网络聊天工具的设计和实现.doc

攀枝花学院本科毕业设计（论文） Linux下的网络聊天工具的设计和实现 学生姓名： XXXXXXX 学生学号： XXXXXXXXXXXX 院（系）： 数学与计算机学院 年级专业： 09级信息与计算科学 指导教师： XXXXX 硕士助教 二零一三年六月   摘 要 这个毕业论文整体采用在linux平台下，在同一局域网内实现聊天功能。整体框架主要分为服务端和客户端两个部分，设置好ip和端口号，在Linux下编译和调试两主大块程序，实现服务端和各个客户端的连接，然后以服务端作为中继转实现客户端之间的通信。由于服务端只有一个，而客户端可以有任意多个，所以服务端采用了链表来管理多个客户端的信息，客户端的信息发送通过封装在结构体中进行传输。本设计采用TCP/IP协议保证连接可靠，并在项目管理中采用linux流行的gcc和makefile编译，提高了编译和调试效率，加快了项目的完成速度。由于要模拟多个客户端，所以在运行的环境中需要在PC机上再克隆一个虚拟系统来操作多个客户端。 本次设计的聊天工具采用字符串命令行的方式进行通信，主要实现了五个功能：新用户的注册与登录，用户之间一对一的聊天，用户之间群聊，用户之间文件加密传输，用户之间聊天记录保存。经过测试，程序运行可靠，能满足在linux中实现网络聊天的要求。 关键词 linux,socket,gedit,服务端,客户端,网络编程  ABSTRACT This thesis gets the realization of chat in the same LAN under the Linux platform. The overall framework is divided into two parts: server and client. Set up the IP and port number, compile and debug two main bulk programs in the Linux and realize the connection between the server and the clients, and then realize the communication between clients by relying on server. Since there is only a server, but are multiple clients, so the server adopts a linked list to manage multiple clients’ information, and the information of clients is packed into struct to transfer. This design adopts the TCP/IP protocol to ensure reliable connection, and uses the Linux gcc and makefile compiler in project management, which improves the compiling and debugging efficiency, and speeds up the project’ completion. Due to the simulation of multiple clients, so it needs to clone a virtual system in the PC machine to operate multiple clients in the running environment. The chat tool of the design works by using the method of character string command line, which mainly accomplishes five functions: new users’ registration and login, biunique chat between users, users’ group chat, file encryption and transmission between users, users’ chat record retention. After the test, the program is reliable, and can meet the requirements of network chat in Li