GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/rdate/rfc868time.c Lines: 0 32 0.0 %
Date: 2017-11-13 Branches: 0 16 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: rfc868time.c,v 1.10 2015/01/16 06:40:20 deraadt Exp $	*/
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/*	$NetBSD: rdate.c,v 1.4 1996/03/16 12:37:45 pk Exp $	*/
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/*
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 * Copyright (c) 1994 Christos Zoulas
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 * All rights reserved.
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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
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 * are met:
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 * 1. 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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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *	This product includes software developed by Christos Zoulas.
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 * 4. The name of the author may not be used to endorse or promote products
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 *    derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/*
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 * rdate.c: Set the date from the specified host
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 *
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 *	Uses the rfc868 time protocol at socket 37 (tcp).
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 *	Time is returned as the number of seconds since
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 *	midnight January 1st 1900.
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 */
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <err.h>
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#include <string.h>
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#include <netdb.h>
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#include <unistd.h>
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#include <time.h>
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/* Obviously it is not just for SNTP clients... */
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#include "ntpleaps.h"
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/* seconds from midnight Jan 1900 - 1970 */
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#define DIFFERENCE 2208988800UL
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void
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rfc868time_client(const char *hostname, int family, struct timeval *new,
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    struct timeval *adjust, int leapflag);
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void
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rfc868time_client(const char *hostname, int family, struct timeval *new,
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    struct timeval *adjust, int leapflag)
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{
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	struct addrinfo hints, *res0, *res;
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	struct timeval old;
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	u_int32_t tim;	/* RFC 868 states clearly this is an uint32 */
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	int s;
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	int error;
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	u_int64_t td;
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	memset(&hints, 0, sizeof(hints));
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	hints.ai_family = family;
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	hints.ai_socktype = SOCK_STREAM;
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	error = getaddrinfo(hostname, "time", &hints, &res0);
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	if (error) {
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		errx(1, "%s: %s", hostname, gai_strerror(error));
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		/*NOTREACHED*/
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	}
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	s = -1;
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	for (res = res0; res; res = res->ai_next) {
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		s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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		if (s < 0)
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			continue;
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		if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
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			close(s);
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			s = -1;
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			continue;
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		}
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		break;
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	}
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	if (s < 0)
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		err(1, "Could not connect socket");
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	freeaddrinfo(res0);
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	if (read(s, &tim, sizeof(tim)) != sizeof(tim))
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		err(1, "Could not read data");
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	(void) close(s);
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	tim = ntohl(tim) - DIFFERENCE;
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	if (gettimeofday(&old, NULL) == -1)
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		err(1, "Could not get local time of day");
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	td = SEC_TO_TAI64(old.tv_sec);
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	if (leapflag)
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		ntpleaps_sub(&td);
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	adjust->tv_sec = tim - TAI64_TO_SEC(td);
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	adjust->tv_usec = 0;
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	new->tv_sec = old.tv_sec + adjust->tv_sec;
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	new->tv_usec = 0;
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}