reactos/dll/win32/libtirpc/src/rtime.c

   1 /*
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /*
  30  * Copyright (c) 1988 by Sun Microsystems, Inc.
  31
  32  */
  33
  34 /*
  35  * rtime - get time from remote machine
  36  *
  37  * gets time, obtaining value from host
  38  * on the udp/time socket.  Since timeserver returns
  39  * with time of day in seconds since Jan 1, 1900,  must
  40  * subtract seconds before Jan 1, 1970 to get
  41  * what unix uses.
  42  */
  43 #include <wintirpc.h>
  44 //#include <pthread.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 //#include <unistd.h>
  48 #include <errno.h>
  49 #include <sys/types.h>
  50 //#include <sys/socket.h>
  51 //#include <sys/time.h>
  52 //#include <netinet/in.h>
  53 #include <stdio.h>
  54 //#include <netdb.h>
  55 //#include <sys/select.h>
  56
  57 extern int _rpc_dtablesize( void );
  58
  59 #define NYEARS  (unsigned long)(1970 - 1900)
  60 #define TOFFSET (unsigned long)(60*60*24*(365*NYEARS + (NYEARS/4)))
  61
  62 #ifndef __REACTOS__
  63 static void do_close( SOCKET );
  64 #else
  65 static void do_close( int );
  66 #endif
  67
  68 int
  69 rtime(addrp, timep, timeout)
  70         struct sockaddr_in *addrp;
  71         struct timeval *timep;
  72         struct timeval *timeout;
  73 {
  74         SOCKET s;
  75         fd_set readfds;
  76         int res;
  77         unsigned long thetime;
  78         struct sockaddr_in from;
  79         int fromlen;
  80         int type;
  81         struct servent *serv;
  82
  83         if (timeout == NULL) {
  84                 type = SOCK_STREAM;
  85         } else {
  86                 type = SOCK_DGRAM;
  87         }
  88         s = socket(AF_INET, type, 0);
  89         if (s == INVALID_SOCKET) {
  90                 return(-1);
  91         }
  92         addrp->sin_family = AF_INET;
  93
  94         /* TCP and UDP port are the same in this case */
  95         if ((serv = getservbyname("time", "tcp")) == NULL) {
  96                 return(-1);
  97         }
  98
  99         addrp->sin_port = serv->s_port;
 100
 101         if (type == SOCK_DGRAM) {
 102                 res = sendto(s, (char *)&thetime, sizeof(thetime), 0,
 103                              (struct sockaddr *)addrp, sizeof(*addrp));
 104                 if (res == SOCKET_ERROR) {
 105                         do_close(s);
 106                         return(-1);
 107                 }
 108                 do {
 109                         FD_ZERO(&readfds);
 110                         FD_SET(s, &readfds);
 111                         res = select(_rpc_dtablesize(), &readfds,
 112                                      (fd_set *)NULL, (fd_set *)NULL, timeout);
 113                 } while (res == SOCKET_ERROR && WSAGetLastError() == WSAEINTR);
 114                 if (res == 0 || res == SOCKET_ERROR) {
 115                         if (res == 0) {
 116                                 errno = WSAETIMEDOUT;
 117                         }
 118                         do_close(s);
 119                         return(-1);
 120                 }
 121                 fromlen = sizeof(from);
 122                 res = recvfrom(s, (char *)&thetime, sizeof(thetime), 0,
 123                                (struct sockaddr *)&from, &fromlen);
 124                 do_close(s);
 125                 if (res == SOCKET_ERROR) {
 126                         return(-1);
 127                 }
 128         } else {
 129                 if (connect(s, (struct sockaddr *)addrp, sizeof(*addrp)) == SOCKET_ERROR) {
 130                         do_close(s);
 131                         return(-1);
 132                 }
 133                 res = recv(s, (char *)&thetime, sizeof(thetime), 0);
 134                 do_close(s);
 135                 if (res == SOCKET_ERROR) {
 136                         return(-1);
 137                 }
 138         }
 139         if (res != sizeof(thetime)) {
 140                 errno = EIO;
 141                 return(-1);
 142         }
 143         thetime = ntohl(thetime);
 144         timep->tv_sec = thetime - TOFFSET;
 145         timep->tv_usec = 0;
 146         return(0);
 147 }
 148
 149 static void
 150 do_close(s)
 151         int s;
 152 {
 153         int save;
 154
 155         save = errno;
 156         (void)closesocket(s);
 157         errno = save;
 158 }