2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)netdate.c 8.1 (Berkeley) 5/31/93
34 * $FreeBSD: src/bin/date/netdate.c,v 1.11.2.1 2001/05/12 17:14:22 fenner Exp $
35 * $DragonFly: src/bin/date/netdate.c,v 1.3 2003/09/28 14:39:13 hmp Exp $
38 #include <sys/param.h>
40 #include <sys/socket.h>
42 #include <netinet/in.h>
45 #include <protocols/timed.h>
54 #define WAITACK 2 /* seconds */
55 #define WAITDATEACK 5 /* seconds */
60 * Set the date in the machines controlled by timedaemons by communicating the
61 * new date to the local timedaemon. If the timedaemon is in the master state,
62 * it performs the correction on all slaves. If it is in the slave state, it
63 * notifies the master that a correction is needed.
64 * Returns 0 on success. Returns > 0 on failure, setting retval to 2;
67 netsettime(time_t tval)
72 struct sockaddr_in sin, dest, from;
75 int s, length, port, timed_ack, found, err;
76 char hostname[MAXHOSTNAMELEN];
78 if ((sp = getservbyname("timed", "udp")) == NULL) {
79 warnx("udp/timed: unknown service");
83 dest.sin_port = sp->s_port;
84 dest.sin_family = AF_INET;
85 dest.sin_addr.s_addr = htonl((u_long)INADDR_ANY);
86 s = socket(AF_INET, SOCK_DGRAM, 0);
88 if (errno != EPROTONOSUPPORT)
93 memset(&sin, 0, sizeof(sin));
94 sin.sin_family = AF_INET;
95 for (port = IPPORT_RESERVED - 1; port > IPPORT_RESERVED / 2; port--) {
96 sin.sin_port = htons((u_short)port);
97 if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
99 if (errno == EADDRINUSE)
101 if (errno != EADDRNOTAVAIL)
105 if (port == IPPORT_RESERVED / 2) {
106 warnx("all ports in use");
109 msg.tsp_type = TSP_SETDATE;
110 msg.tsp_vers = TSPVERSION;
111 if (gethostname(hostname, sizeof(hostname))) {
115 (void)strncpy(msg.tsp_name, hostname, sizeof(msg.tsp_name) - 1);
116 msg.tsp_name[sizeof(msg.tsp_name) - 1] = '\0';
117 msg.tsp_seq = htons((u_short)0);
118 msg.tsp_time.tv_sec = htonl((u_long)tval);
119 msg.tsp_time.tv_usec = htonl((u_long)0);
120 length = sizeof(struct sockaddr_in);
121 if (connect(s, (struct sockaddr *)&dest, length) < 0) {
125 if (send(s, (char *)&msg, sizeof(struct tsp), 0) < 0) {
126 if (errno != ECONNREFUSED)
134 tout.tv_sec = waittime;
139 found = select(FD_SETSIZE, &ready, (fd_set *)0, (fd_set *)0, &tout);
141 length = sizeof(err);
143 SOL_SOCKET, SO_ERROR, (char *)&err, &length) && err) {
144 if (err != ECONNREFUSED)
145 warnc(err, "send (delayed error)");
149 if (found > 0 && FD_ISSET(s, &ready)) {
150 length = sizeof(struct sockaddr_in);
151 if (recvfrom(s, &msg, sizeof(struct tsp), 0,
152 (struct sockaddr *)&from, &length) < 0) {
153 if (errno != ECONNREFUSED)
157 msg.tsp_seq = ntohs(msg.tsp_seq);
158 msg.tsp_time.tv_sec = ntohl(msg.tsp_time.tv_sec);
159 msg.tsp_time.tv_usec = ntohl(msg.tsp_time.tv_usec);
160 switch (msg.tsp_type) {
163 waittime = WAITDATEACK;
169 warnx("wrong ack received from timed: %s",
170 tsptype[msg.tsp_type]);
176 warnx("can't reach time daemon, time set locally");