reactos/dll/cpl/timedate/ntpclient.c

   1 #include <timedate.h>
   2
   3 SOCKET Sock;
   4 SOCKADDR_IN myAddr, ntpAddr;
   5
   6 BOOL InitialiseConnection()
   7 {
   8     WSADATA wsaData;
   9     INT Ret;
  10
  11     Ret = WSAStartup(MAKEWORD(2, 2),
  12                      &wsaData);
  13     if (Ret != 0)
  14         return FALSE;
  15
  16
  17     Sock = WSASocket(AF_INET,
  18                      SOCK_DGRAM,
  19                      IPPROTO_UDP,
  20                      NULL,
  21                      0,
  22                      WSA_FLAG_OVERLAPPED);
  23     if (Sock == INVALID_SOCKET )
  24         return FALSE;
  25
  26     /* setup client socket */
  27     ZeroMemory(&myAddr, sizeof(myAddr));
  28     myAddr.sin_family = AF_INET;
  29     myAddr.sin_port = htons(IPPORT_TIMESERVER);
  30     myAddr.sin_addr.s_addr = INADDR_ANY;
  31
  32     Ret = bind(Sock,
  33                (SOCKADDR *)&myAddr,
  34                sizeof(SOCKADDR));
  35     if (Ret == SOCKET_ERROR)
  36         return FALSE;
  37
  38     /* setup server socket */
  39     ZeroMemory(&ntpAddr, sizeof(ntpAddr));
  40     ntpAddr.sin_family = AF_INET;
  41     ntpAddr.sin_port = htons(IPPORT_TIMESERVER);
  42     ntpAddr.sin_addr.s_addr = INADDR_ANY;
  43
  44     return TRUE;
  45 }
  46
  47 VOID DestroyConnection()
  48 {
  49     WSACleanup();
  50 }
  51
  52 /* send some data to wake the server up */
  53 BOOL SendData()
  54 {
  55     CHAR Packet[] = "";
  56     INT Ret;
  57
  58     Ret = sendto(Sock,
  59                  Packet,
  60                  sizeof(Packet),
  61                  0,
  62                  (SOCKADDR *)&myAddr,
  63                  sizeof(SOCKADDR_IN));
  64
  65     if (Ret == SOCKET_ERROR)
  66         return FALSE;
  67
  68     return TRUE;
  69 }
  70
  71
  72 BOOL RecieveData(CHAR *Buf)
  73 {
  74     INT Ret;
  75     INT Size = sizeof(SOCKADDR_IN);
  76
  77     Ret = recvfrom(Sock,
  78                    Buf,
  79                    BUFSIZE,
  80                    0,
  81                    (SOCKADDR *)&ntpAddr,
  82                    &Size);
  83     if (Ret == SOCKET_ERROR)
  84         return FALSE;
  85
  86     return TRUE;
  87 }