2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
25 * Sun Microsystems, Inc.
27 * Mountain View, California 94043
30 static char sccsid[] = "@(#)rtime.c 2.2 88/08/10 4.0 RPCSRC; from 1.8 88/02/08 SMI";
34 * Copyright (c) 1988 by Sun Microsystems, Inc.
37 * rtime - get time from remote machine
39 * gets time, obtaining value from host
40 * on the udp/time socket. Since timeserver returns
41 * with time of day in seconds since Jan 1, 1900, must
42 * subtract seconds before Jan 1, 1970 to get
53 #include <sys/types.h>
55 #include <sys/socket.h>
57 #include <rpc/auth_des.h>
59 #include <netinet/in.h>
61 libc_hidden_proto(read)
62 libc_hidden_proto(socket)
63 libc_hidden_proto(close)
64 libc_hidden_proto(connect)
65 libc_hidden_proto(recvfrom)
66 libc_hidden_proto(sendto)
67 libc_hidden_proto(poll)
69 #define NYEARS (u_long)(1970 - 1900)
70 #define TOFFSET (u_long)(60*60*24*(365*NYEARS + (NYEARS/4)))
72 static void do_close (int);
85 rtime (struct sockaddr_in *addrp, struct rpc_timeval *timep,
86 struct rpc_timeval *timeout)
92 unsigned long thetime;
93 struct sockaddr_in from;
102 s = socket (AF_INET, type, 0);
106 addrp->sin_family = AF_INET;
107 addrp->sin_port = htons (IPPORT_TIMESERVER);
108 if (type == SOCK_DGRAM)
110 res = sendto (s, (char *) &thetime, sizeof (thetime), 0,
111 (struct sockaddr *) addrp, sizeof (*addrp));
117 milliseconds = (timeout->tv_sec * 1000) + (timeout->tv_usec / 1000);
121 res = poll (&fd, 1, milliseconds);
122 while (res < 0 && errno == EINTR);
126 __set_errno (ETIMEDOUT);
130 fromlen = sizeof (from);
131 res = recvfrom (s, (char *) &thetime, sizeof (thetime), 0,
132 (struct sockaddr *) &from, &fromlen);
139 if (connect (s, (struct sockaddr *) addrp, sizeof (*addrp)) < 0)
144 res = read (s, (char *) &thetime, sizeof (thetime));
149 if (res != sizeof (thetime))
154 thetime = ntohl (thetime);
155 timep->tv_sec = thetime - TOFFSET;