vc实现局域网内点对点通信

#include <winsock2.h> #include <stdio.h> #pragma comment(lib,"ws2_32.lib") void main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD( 1, 1 );//请求1.1版本的winsock库 err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) { return; } if ( LOBYTE( wsaData.wVersion ) != 1 || HIBYTE( wsaData.wVersion ) != 1 ) { WSACleanup( ); return; } //加载完套接字的库后，创建套接字 SOCKET sockSrv=socket(AF_INET,SOCK_DGRAM,0); //将套接字绑定到地址 SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY); addrSrv.sin_family=AF_INET; addrSrv.sin_port=htons(6000); bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); char recvBuf[100]; char sendBuf[100]; char tempBuf[200]; SOCKADDR_IN addrClient;//获取通讯方的地址信息 int len=sizeof(SOCKADDR); while(1) { recvfrom(sockSrv,recvBuf,100,0,(SOCKADDR*)&addrClient,&len); // if('q'==recvBuf[0]) { sendto(sockSrv,"q",strlen("q")+1,0,(SOCKADDR*)&addrClient,len); printf("chat end!\n"); } sprintf(tempBuf,"%s say: %s",inet_ntoa(addrClient.sin_addr),recvBuf); printf("%s\n",tempBuf); printf("Please input data:\n"); gets(sendBuf);//获取一行数据，回车结束 sendto(sockSrv,sendBuf,strlen(sendBuf)+1,0,(SOCKADDR*)&addrClient,len); } closesocket(sockSrv); WSACleanup(); }