基于socket的UDP通信源代码

#include <winsock2.h> #include <stdio.h> void 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; } 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(8889); bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); char recvBuf[50]; SOCKADDR addrClient; int len=sizeof(SOCKADDR); recvfrom(sockSrv,recvBuf,50,0,(SOCKADDR*)&addrClient,&len); printf("%s\n",recvBuf); closesocket(sockSrv); WSACleanup(); }