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021db4be6f
New configure option --enable-obsolete-rpc makes the deprecated RPC headers and functions available at compile time as they were before version 2.14. This option will be removed at some time in the future after the TI-RPC library becomes fully sufficient for the needs of existing applications.
144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
/*
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* Copyright (c) 2010, Oracle America, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of the "Oracle America, Inc." nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* rtime - get time from remote machine
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*
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* gets time, obtaining value from host
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* on the udp/time socket. Since timeserver returns
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* with time of day in seconds since Jan 1, 1900, must
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* subtract seconds before Jan 1, 1970 to get
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* what unix uses.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <rpc/rpc.h>
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#include <rpc/clnt.h>
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#include <sys/types.h>
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#include <sys/poll.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <rpc/auth_des.h>
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#include <errno.h>
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#include <netinet/in.h>
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#define NYEARS (u_long)(1970 - 1900)
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#define TOFFSET (u_long)(60*60*24*(365*NYEARS + (NYEARS/4)))
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static void do_close (int);
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static void
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do_close (int s)
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{
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int save;
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save = errno;
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__close (s);
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__set_errno (save);
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}
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int
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rtime (struct sockaddr_in *addrp, struct rpc_timeval *timep,
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struct rpc_timeval *timeout)
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{
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int s;
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struct pollfd fd;
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int milliseconds;
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int res;
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/* RFC 868 says the time is transmitted as a 32-bit value. */
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uint32_t thetime;
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struct sockaddr_in from;
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socklen_t fromlen;
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int type;
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if (timeout == NULL)
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type = SOCK_STREAM;
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else
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type = SOCK_DGRAM;
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s = __socket (AF_INET, type, 0);
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if (s < 0)
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return (-1);
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addrp->sin_family = AF_INET;
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addrp->sin_port = htons (IPPORT_TIMESERVER);
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if (type == SOCK_DGRAM)
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{
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res = __sendto (s, (char *) &thetime, sizeof (thetime), 0,
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(struct sockaddr *) addrp, sizeof (*addrp));
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if (res < 0)
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{
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do_close (s);
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return -1;
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}
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milliseconds = (timeout->tv_sec * 1000) + (timeout->tv_usec / 1000);
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fd.fd = s;
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fd.events = POLLIN;
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do
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res = __poll (&fd, 1, milliseconds);
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while (res < 0 && errno == EINTR);
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if (res <= 0)
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{
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if (res == 0)
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__set_errno (ETIMEDOUT);
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do_close (s);
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return (-1);
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}
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fromlen = sizeof (from);
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res = __recvfrom (s, (char *) &thetime, sizeof (thetime), 0,
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(struct sockaddr *) &from, &fromlen);
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do_close (s);
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if (res < 0)
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return -1;
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}
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else
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{
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if (__connect (s, (struct sockaddr *) addrp, sizeof (*addrp)) < 0)
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{
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do_close (s);
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return -1;
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}
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res = __read (s, (char *) &thetime, sizeof (thetime));
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do_close (s);
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if (res < 0)
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return (-1);
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}
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if (res != sizeof (thetime))
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{
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__set_errno (EIO);
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return -1;
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}
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thetime = ntohl (thetime);
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timep->tv_sec = thetime - TOFFSET;
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timep->tv_usec = 0;
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return 0;
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}
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libc_hidden_nolink_sunrpc (rtime, GLIBC_2_1)
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