Return to rfc868time.c CVS log

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Christos Zoulas agreed to rescind clause 3 and 4 in
NetBSD fsck.8 rev 1.35 fsutil.h rev 1.14 pathnames.h rev 1.2
netgroup_mkdb.8 rev 1.9 netgroup_mkdb.c rev 1.18 str.c rev 1.7
str.h rev 1.4 rdate.8 rev 1.11 rdate.c rev 1.19 extern.h rev 1.14
getnetgrent.c rev 1.41 netgroup.h rev 1.10
fparseln.3 rev 1.4 fparseln.c rev 1.10

our stringlist.c/stringlist.h are derived from getnetgrent.c
rfc868time.c from rdate.c
newfs/pathnames.h from fsck/pathnames.h

https://mail-index.netbsd.org/source-changes/2009/10/21/msg002182.html
Not all files are covered as some had copyright assigned to TNF in 1998.

/*	$OpenBSD: rfc868time.c,v 1.13 2023/01/04 13:00:11 jsg Exp $	*/
/*	$NetBSD: rdate.c,v 1.4 1996/03/16 12:37:45 pk Exp $	*/

/*
 * Copyright (c) 1994 Christos Zoulas
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * rdate.c: Set the date from the specified host
 *
 *	Uses the rfc868 time protocol at socket 37 (tcp).
 *	Time is returned as the number of seconds since
 *	midnight January 1st 1900.
 */

#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>

#include <stdio.h>
#include <ctype.h>
#include <err.h>
#include <string.h>
#include <netdb.h>
#include <unistd.h>
#include <time.h>

/* Obviously it is not just for SNTP clients... */
#include "ntpleaps.h"

/* seconds from midnight Jan 1900 - 1970 */
#define DIFFERENCE 2208988800UL

void
rfc868time_client(const char *hostname, int family, struct timeval *new,
    struct timeval *adjust, int leapflag);


void
rfc868time_client(const char *hostname, int family, struct timeval *new,
    struct timeval *adjust, int leapflag)
{
	struct addrinfo hints, *res0, *res;
	struct timeval old;
	u_int32_t tim;	/* RFC 868 states clearly this is an uint32 */
	int s;
	int error;
	u_int64_t td;

	memset(&hints, 0, sizeof(hints));
	hints.ai_family = family;
	hints.ai_socktype = SOCK_STREAM;
	error = getaddrinfo(hostname, "time", &hints, &res0);
	if (error) {
		errx(1, "%s: %s", hostname, gai_strerror(error));
		/*NOTREACHED*/
	}

	if (pledge("stdio inet", NULL) == -1)
		err(1, "pledge");

	s = -1;
	for (res = res0; res; res = res->ai_next) {
		s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
		if (s == -1)
			continue;

		if (connect(s, res->ai_addr, res->ai_addrlen) == -1) {
			close(s);
			s = -1;
			continue;
		}

		break;
	}
	if (s == -1)
		err(1, "Could not connect socket");
	freeaddrinfo(res0);

	if (read(s, &tim, sizeof(tim)) != sizeof(tim))
		err(1, "Could not read data");

	(void) close(s);
	tim = ntohl(tim) - DIFFERENCE;

	if (gettimeofday(&old, NULL) == -1)
		err(1, "Could not get local time of day");

	td = SEC_TO_TAI64(old.tv_sec);
	if (leapflag)
		ntpleaps_sub(&td);

	adjust->tv_sec = tim - TAI64_TO_SEC(td);
	adjust->tv_usec = 0;

	new->tv_sec = old.tv_sec + adjust->tv_sec;
	new->tv_usec = 0;
}