initial import of NetBSD tree

1 files changed, 191 insertions, 0 deletions

diff --git a/bin/date/netdate.c b/bin/date/netdate.c
new file mode 100644
index 00000000000..50595436d28
--- /dev/null
+++ b/bin/date/netdate.c
@@ -0,0 +1,191 @@
+/*	$NetBSD: netdate.c,v 1.10 1995/09/07 06:21:06 jtc 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)netdate.c	8.2 (Berkeley) 4/28/95";
+#else
+static char rcsid[] = "$NetBSD: netdate.c,v 1.10 1995/09/07 06:21:06 jtc 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 <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "extern.h"
+
+#define	WAITACK		2	/* seconds */
+#define	WAITDATEACK	5	/* seconds */
+
+extern int retval;
+
+/*
+ * 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, setting retval to 2;
+ */
+int
+netsettime(tval)
+	time_t tval;
+{
+	struct timeval tout;
+	struct servent *sp;
+	struct tsp msg;
+	struct sockaddr_in sin, dest, from;
+	fd_set ready;
+	long waittime;
+	int s, length, port, timed_ack, found, err;
+	char hostname[MAXHOSTNAMELEN];
+
+	if ((sp = getservbyname("timed", "udp")) == NULL) {
+		warnx("udp/timed: unknown service");
+		return (retval = 2);
+	}
+
+	memset(&dest, 0, sizeof(dest));
+	dest.sin_len = sizeof(struct sockaddr_in);
+	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 < 0) {
+		if (errno != EPROTONOSUPPORT)
+			warn("timed");
+		return (retval = 2);
+	}
+
+	memset(&sin, 0, sizeof(sin));
+	sin.sin_len = sizeof(struct sockaddr_in);
+	sin.sin_family = AF_INET;
+	for (port = IPPORT_RESERVED - 1; port > IPPORT_RESERVED / 2; port--) {
+		sin.sin_port = htons((u_short)port);
+		if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
+			break;
+		if (errno == EADDRINUSE)
+			continue;
+		if (errno != EADDRNOTAVAIL)
+			warn("bind");
+		goto bad;
+	}
+	if (port == IPPORT_RESERVED / 2) {
+		warnx("all ports in use");
+		goto bad;
+	}
+	msg.tsp_type = TSP_SETDATE;
+	msg.tsp_vers = TSPVERSION;
+	if (gethostname(hostname, sizeof(hostname))) {
+		warn("gethostname");
+		goto bad;
+	}
+	(void)strncpy(msg.tsp_name, hostname, sizeof(hostname));
+	msg.tsp_seq = htons((u_short)0);
+	msg.tsp_time.tv_sec = htonl((u_long)tval);
+	msg.tsp_time.tv_usec = htonl((u_long)0);
+	length = sizeof(struct sockaddr_in);
+	if (connect(s, (struct sockaddr *)&dest, length) < 0) {
+		warn("connect");
+		goto bad;
+	}
+	if (send(s, (char *)&msg, sizeof(struct tsp), 0) < 0) {
+		if (errno != ECONNREFUSED)
+			warn("send");
+		goto bad;
+	}
+
+	timed_ack = -1;
+	waittime = WAITACK;
+loop:
+	tout.tv_sec = waittime;
+	tout.tv_usec = 0;
+
+	FD_ZERO(&ready);
+	FD_SET(s, &ready);
+	found = select(FD_SETSIZE, &ready, (fd_set *)0, (fd_set *)0, &tout);
+
+	length = sizeof(err);
+	if (!getsockopt(s,
+	    SOL_SOCKET, SO_ERROR, (char *)&err, &length) && err) {
+		if (err != ECONNREFUSED)
+			warn("send (delayed error)");
+		goto bad;
+	}
+
+	if (found > 0 && FD_ISSET(s, &ready)) {
+		length = sizeof(struct sockaddr_in);
+		if (recvfrom(s, &msg, sizeof(struct tsp), 0,
+		    (struct sockaddr *)&from, &length) < 0) {
+			if (errno != ECONNREFUSED)
+				warn("recvfrom");
+			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", 
+			    tsptype[msg.tsp_type]);
+			timed_ack = -1;
+			break;
+		}
+	}
+	if (timed_ack == -1)
+		warnx("can't reach time daemon, time set locally");
+
+bad:
+	(void)close(s);
+	return (retval = 2);
+}