点对点通信的聊天程序设计文档.doc

点对点通信的聊天程序设计文档 需求分析: 服务端启动后建立链接，等待客户端接入。 客户端接入后，服务端与客户端可以进行点对点通讯。 概要设计： 服务器首先启动，创建套接字后等待客户的连接；客户启动以后，创建套接字，然后和服务器建立连接；连接建立后，客户机和服务器可以通过建立的套接字连接进行信息通信。 具体实现及关键代码分析： ----Serv.cpp---- #include stdio.h #include winsock2.h #include string.h #pragma comment(lib,ws2_32.lib) void main() { /*初始化*/ WSADATA wsaData; WSAStartup(MAKEWORD(2,2),wsaData); SOCKET Serv; SOCKET Client; char buffer[1024]; SOCKADDR_IN addr; int result=0; unsigned short int nPort=5001; addr.sin_addr.S_un.S_addr = htons(INADDR_ANY); addr.sin_family=AF_INET; addr.sin_port = htons(nPort); /*创建套接字*/ Serv = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); /*绑定地址*/ bind(Serv,(SOCKADDR*)addr,sizeof(addr)); /*开始监听*/ listen(Serv,5); /*接受并处理数据*/ Client = accept(Serv,NULL,NULL); printf(\n); while(strcmp(buffer,end)!=0) { memset(buffer,0,sizeof(buffer)); result = recv(Client,buffer,sizeof(buffer),0); if(result0) { printf(Client said: %s\n,buffer); } } /*关闭服务*/ closesocket(Serv); closesocket(Client); WSACleanup(); } ----Client.cpp---- #include stdio.h #include string.h #include winsock2.h #pragma comment(lib,ws2_32.lib) void main() { WSADATA wsaData; SOCKET Client; int result=0; char buffer[1024]; SOCKADDR_IN addr; WSAStartup(MAKEWORD(2,2),wsaData); addr.sin_addr.S_un.S_addr = inet_addr(127.0.0.1); addr.sin_family = AF_INET; addr.sin_port = htons(5001); /*创建套接字*/ Client= socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); /*链接地址*/ connect(Client,(SOCKADDR*)addr,sizeof(addr)); memset(buffer,0,sizeof(buffer)); printf(Input Message: ); /*输入字符串并打印传送*/ scanf(%s,buffer); while(strcmp(buffer,end)!=0) { send(Client,buffer,strlen(buffer),0); memset(buffer,0,sizeof(buffer)); printf(Input Message: ); scanf(%s,buffer); } send(Client,end,sizeof(end),0); closesocket(Client); WSACleanup(); }