基于tcp的局域网通信软件

#include <winsock2.h> #include <stdio.h> #pragma comment(lib,"WS2_32") int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested=MAKEWORD(1,1); err=WSAStartup(wVersionRequested,&wsaData); if(err!=0) return; if(LOBYTE(wsaData.wVersion)!=1 || HIBYTE(wsaData.wVersion)!=1) { WSACleanup(); return; } //创建套结子 SOCKET sListen=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if(sListen==INVALID_SOCKET) { printf("Failed socket()\n"); return ; } //填充sockaddr_in结构 sockaddr_in sin; sin.sin_port=htons(2000); sin.sin_addr.S_un.S_addr=INADDR_ANY; sin.sin_family=AF_INET; if(bind(sListen,(LPSOCKADDR)&sin,sizeof(sin))==SOCKET_ERROR) { printf("Failed bind() \n"); return ; } //进入监听模式 if(listen(sListen,2)==SOCKET_ERROR) { printf("Failed listen() \n "); return ; } //连接请求 sockaddr_in remoteAddr; int nAddrlen=sizeof(remoteAddr); SOCKET sClient; printf("waiting...."); sClient=accept(sListen,(SOCKADDR*)&remoteAddr,&nAddrlen); if(sClient==INVALID_SOCKET) { printf("failed accept()"); return; } printf("\n接受到一个连接：%s\r\n",inet_ntoa(remoteAddr.sin_addr)); while(1) { //向客户端发送数据 char recvBuf[100]; char sendBuf[100]; char tempBuf[200]; recv(sClient,recvBuf,100,0); if('q'==recvBuf[0]) { send(sClient,"q",strlen("q"),0); printf("Chat End! \n"); break; } sprintf(tempBuf,"%s says: %s",remoteAddr.sin_addr,recvBuf); printf("%s\n,recvBuf"); printf("please in put ："); gets(sendBuf); send(sClient,sendBuf,100,0); } closesocket(sClient); closesocket(sListen); WSACleanup(); }