发送UDP数据

int SendUDPMsg( const char* pPeerIP, unsigned short int nPort, const void* pData, size_t n )

{

SOCKET s = socket( AF_INET, SOCK_DGRAM, 0 );

struct sockaddr_in addr;

addr.sin_family = AF_INET;

addr.sin_port = htons( nPort );

addr.sin_addr.s_addr = inet_addr( pPeerIP );

connect( s, (struct sockaddr*)&addr, sizeof(addr) );

send( s, (char*)pData, n, 0 );

closesocket( s );

return 0;

}