基于UDP协议的组播通信程序设计

int nRet,i;

BOOL bFlag;

DWORD cbRet;

int iLen = MAXADDRSTR;

char strDestMulti[MAXADDRSTR] = "224.1.1.1";

SOCKADDR_IN stSrcAddr,stDestAddr;

if (nRet) {

printf("WSAStartup failed:%d\r\n",nRet);

exit(1);}

nRet = WSAStringToAddress(strDestMulti,

AF_INET,NULL,

(LPSOCKADDR)&stDestAddr,&iLen);

if (nRet) {printf("WSAstringToAddress(%s)failed,

Err:%d\n",strDestMulti,WSAGetLastError());