149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "@(#)rtime.c 2.2 88/08/10 4.0 RPCSRC; from 1.8 88/02/08 SMI";
|
|
#endif
|
|
/*
|
|
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
|
|
* unrestricted use provided that this legend is included on all tape
|
|
* media and as a part of the software program in whole or part. Users
|
|
* may copy or modify Sun RPC without charge, but are not authorized
|
|
* to license or distribute it to anyone else except as part of a product or
|
|
* program developed by the user.
|
|
*
|
|
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
|
|
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
|
|
*
|
|
* Sun RPC is provided with no support and without any obligation on the
|
|
* part of Sun Microsystems, Inc. to assist in its use, correction,
|
|
* modification or enhancement.
|
|
*
|
|
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
|
|
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
|
|
* OR ANY PART THEREOF.
|
|
*
|
|
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
|
|
* or profits or other special, indirect and consequential damages, even if
|
|
* Sun has been advised of the possibility of such damages.
|
|
*
|
|
* Sun Microsystems, Inc.
|
|
* 2550 Garcia Avenue
|
|
* Mountain View, California 94043
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1988 by Sun Microsystems, Inc.
|
|
*/
|
|
/*
|
|
* rtime - get time from remote machine
|
|
*
|
|
* gets time, obtaining value from host
|
|
* on the udp/time socket. Since timeserver returns
|
|
* with time of day in seconds since Jan 1, 1900, must
|
|
* subtract seconds before Jan 1, 1970 to get
|
|
* what unix uses.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <rpc/rpc.h>
|
|
#include <rpc/clnt.h>
|
|
#include <sys/types.h>
|
|
#include <sys/poll.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/time.h>
|
|
#include <rpc/auth_des.h>
|
|
#include <errno.h>
|
|
#include <netinet/in.h>
|
|
|
|
#define NYEARS (u_long)(1970 - 1900)
|
|
#define TOFFSET (u_long)(60*60*24*(365*NYEARS + (NYEARS/4)))
|
|
|
|
static void do_close (int);
|
|
|
|
static void
|
|
do_close (int s)
|
|
{
|
|
int save;
|
|
|
|
save = errno;
|
|
__close (s);
|
|
__set_errno (save);
|
|
}
|
|
|
|
int
|
|
rtime (struct sockaddr_in *addrp, struct rpc_timeval *timep,
|
|
struct rpc_timeval *timeout)
|
|
{
|
|
int s;
|
|
struct pollfd fd;
|
|
int milliseconds;
|
|
int res;
|
|
/* RFC 868 says the time is transmitted as a 32-bit value. */
|
|
uint32_t thetime;
|
|
struct sockaddr_in from;
|
|
socklen_t fromlen;
|
|
int type;
|
|
|
|
if (timeout == NULL)
|
|
type = SOCK_STREAM;
|
|
else
|
|
type = SOCK_DGRAM;
|
|
|
|
s = __socket (AF_INET, type, 0);
|
|
if (s < 0)
|
|
return (-1);
|
|
|
|
addrp->sin_family = AF_INET;
|
|
addrp->sin_port = htons (IPPORT_TIMESERVER);
|
|
if (type == SOCK_DGRAM)
|
|
{
|
|
res = __sendto (s, (char *) &thetime, sizeof (thetime), 0,
|
|
(struct sockaddr *) addrp, sizeof (*addrp));
|
|
if (res < 0)
|
|
{
|
|
do_close (s);
|
|
return -1;
|
|
}
|
|
milliseconds = (timeout->tv_sec * 1000) + (timeout->tv_usec / 1000);
|
|
fd.fd = s;
|
|
fd.events = POLLIN;
|
|
do
|
|
res = __poll (&fd, 1, milliseconds);
|
|
while (res < 0 && errno == EINTR);
|
|
if (res <= 0)
|
|
{
|
|
if (res == 0)
|
|
__set_errno (ETIMEDOUT);
|
|
do_close (s);
|
|
return (-1);
|
|
}
|
|
fromlen = sizeof (from);
|
|
res = __recvfrom (s, (char *) &thetime, sizeof (thetime), 0,
|
|
(struct sockaddr *) &from, &fromlen);
|
|
do_close (s);
|
|
if (res < 0)
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
if (__connect (s, (struct sockaddr *) addrp, sizeof (*addrp)) < 0)
|
|
{
|
|
do_close (s);
|
|
return -1;
|
|
}
|
|
res = __read (s, (char *) &thetime, sizeof (thetime));
|
|
do_close (s);
|
|
if (res < 0)
|
|
return (-1);
|
|
}
|
|
if (res != sizeof (thetime))
|
|
{
|
|
__set_errno (EIO);
|
|
return -1;
|
|
}
|
|
thetime = ntohl (thetime);
|
|
timep->tv_sec = thetime - TOFFSET;
|
|
timep->tv_usec = 0;
|
|
return 0;
|
|
}
|
|
libc_hidden_def (rtime)
|