UDP.rar_udp 服务 客户_udp 服务器_visual c

#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); 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)); SOCKADDR_IN addrClient; int len=sizeof(SOCKADDR); char recvBuf[100]; recvfrom(sockSrv,recvBuf,100,0,(SOCKADDR*)&addrClient,&len); printf("%s\n",recvBuf); closesocket(sockSrv); WSACleanup(); }