minix/bin/date/netdate.c
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00

200 lines
5.2 KiB
C

/* $NetBSD: netdate.c,v 1.30 2011/01/29 02:16:52 christos Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)netdate.c 8.2 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: netdate.c,v 1.30 2011/01/29 02:16:52 christos Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#define TSPTYPES
#include <protocols/timed.h>
#include <err.h>
#include <errno.h>
#include <poll.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "extern.h"
#define WAITACK 2000 /* milliseconds */
#define WAITDATEACK 5000 /* milliseconds */
static const char *
tsp_type_to_string(const struct tsp *msg)
{
unsigned i;
i = msg->tsp_type;
return i < TSPTYPENUMBER ? tsptype[i] : "unknown";
}
/*
* Set the date in the machines controlled by timedaemons by communicating the
* new date to the local timedaemon. If the timedaemon is in the master state,
* it performs the correction on all slaves. If it is in the slave state, it
* notifies the master that a correction is needed.
* Returns 0 on success. Returns > 0 on failure.
*/
int
netsettime(time_t tval)
{
struct sockaddr_in dest;
struct tsp msg;
char hostname[MAXHOSTNAMELEN];
struct servent *sp;
struct pollfd ready;
int found, s, timed_ack, waittime;
if ((sp = getservbyname("timed", "udp")) == NULL) {
warnx("udp/timed: unknown service");
return 2;
}
(void)memset(&dest, 0, sizeof(dest));
#ifdef BSD4_4
dest.sin_len = sizeof(dest);
#endif
dest.sin_family = AF_INET;
dest.sin_port = sp->s_port;
dest.sin_addr.s_addr = htonl(INADDR_ANY);
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s == -1) {
if (errno != EAFNOSUPPORT)
warn("timed");
return 2;
}
#ifdef IP_PORTRANGE
{
static const int on = IP_PORTRANGE_LOW;
if (setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &on,
sizeof(on)) == -1) {
warn("setsockopt");
goto bad;
}
}
#endif
msg.tsp_type = TSP_SETDATE;
msg.tsp_vers = TSPVERSION;
if (gethostname(hostname, sizeof(hostname)) == -1) {
warn("gethostname");
goto bad;
}
(void)strlcpy(msg.tsp_name, hostname, sizeof(msg.tsp_name));
msg.tsp_seq = htons((in_port_t)0);
msg.tsp_time.tv_sec = htonl((in_addr_t)tval); /* XXX: y2038 */
msg.tsp_time.tv_usec = htonl((in_addr_t)0);
if (connect(s, (const void *)&dest, sizeof(dest)) == -1) {
warn("connect");
goto bad;
}
if (send(s, &msg, sizeof(msg), 0) == -1) {
if (errno != ECONNREFUSED)
warn("send");
goto bad;
}
timed_ack = -1;
waittime = WAITACK;
ready.fd = s;
ready.events = POLLIN;
loop:
found = poll(&ready, 1, waittime);
{
socklen_t len;
int error;
len = sizeof(error);
if (getsockopt(s, SOL_SOCKET, SO_ERROR, &error, &len) == -1) {
warn("getsockopt");
goto bad;
}
if (error) {
if (error != ECONNREFUSED) {
errno = error;
warn("send (delayed error)");
}
goto bad;
}
}
if (found > 0 && ready.revents & POLLIN) {
ssize_t ret;
if ((ret = recv(s, &msg, sizeof(msg), 0)) == -1) {
if (errno != ECONNREFUSED)
warn("recv");
goto bad;
} else if ((size_t)ret < sizeof(msg)) {
warnx("recv: incomplete packet");
goto bad;
}
msg.tsp_seq = ntohs(msg.tsp_seq);
msg.tsp_time.tv_sec = ntohl(msg.tsp_time.tv_sec);
msg.tsp_time.tv_usec = ntohl(msg.tsp_time.tv_usec);
switch (msg.tsp_type) {
case TSP_ACK:
timed_ack = TSP_ACK;
waittime = WAITDATEACK;
goto loop;
case TSP_DATEACK:
(void)close(s);
return 0;
default:
warnx("wrong ack received from timed: %s",
tsp_type_to_string(&msg));
timed_ack = -1;
break;
}
}
if (timed_ack == -1)
warnx("can't reach time daemon, time set locally");
bad:
(void)close(s);
return 2;
}