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
36 static char sccsid[] = "@(#)netdate.c 8.1 (Berkeley) 5/31/93";
38 static const char rcsid[] =
39 "$FreeBSD: src/bin/date/netdate.c,v 1.11.2.1 2001/05/12 17:14:22 fenner Exp $";
42 #include <sys/param.h>
44 #include <sys/socket.h>
46 #include <netinet/in.h>
49 #include <protocols/timed.h>
58 #define WAITACK 2 /* seconds */
59 #define WAITDATEACK 5 /* seconds */
64 * Set the date in the machines controlled by timedaemons by communicating the
65 * new date to the local timedaemon. If the timedaemon is in the master state,
66 * it performs the correction on all slaves. If it is in the slave state, it
67 * notifies the master that a correction is needed.
68 * Returns 0 on success. Returns > 0 on failure, setting retval to 2;
77 struct sockaddr_in sin, dest, from;
80 int s, length, port, timed_ack, found, err;
81 char hostname[MAXHOSTNAMELEN];
83 if ((sp = getservbyname("timed", "udp")) == NULL) {
84 warnx("udp/timed: unknown service");
88 dest.sin_port = sp->s_port;
89 dest.sin_family = AF_INET;
90 dest.sin_addr.s_addr = htonl((u_long)INADDR_ANY);
91 s = socket(AF_INET, SOCK_DGRAM, 0);
93 if (errno != EPROTONOSUPPORT)
98 memset(&sin, 0, sizeof(sin));
99 sin.sin_family = AF_INET;
100 for (port = IPPORT_RESERVED - 1; port > IPPORT_RESERVED / 2; port--) {
101 sin.sin_port = htons((u_short)port);
102 if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
104 if (errno == EADDRINUSE)
106 if (errno != EADDRNOTAVAIL)
110 if (port == IPPORT_RESERVED / 2) {
111 warnx("all ports in use");
114 msg.tsp_type = TSP_SETDATE;
115 msg.tsp_vers = TSPVERSION;
116 if (gethostname(hostname, sizeof(hostname))) {
120 (void)strncpy(msg.tsp_name, hostname, sizeof(msg.tsp_name) - 1);
121 msg.tsp_name[sizeof(msg.tsp_name) - 1] = '\0';
122 msg.tsp_seq = htons((u_short)0);
123 msg.tsp_time.tv_sec = htonl((u_long)tval);
124 msg.tsp_time.tv_usec = htonl((u_long)0);
125 length = sizeof(struct sockaddr_in);
126 if (connect(s, (struct sockaddr *)&dest, length) < 0) {
130 if (send(s, (char *)&msg, sizeof(struct tsp), 0) < 0) {
131 if (errno != ECONNREFUSED)
139 tout.tv_sec = waittime;
144 found = select(FD_SETSIZE, &ready, (fd_set *)0, (fd_set *)0, &tout);
146 length = sizeof(err);
148 SOL_SOCKET, SO_ERROR, (char *)&err, &length) && err) {
149 if (err != ECONNREFUSED)
150 warnc(err, "send (delayed error)");
154 if (found > 0 && FD_ISSET(s, &ready)) {
155 length = sizeof(struct sockaddr_in);
156 if (recvfrom(s, &msg, sizeof(struct tsp), 0,
157 (struct sockaddr *)&from, &length) < 0) {
158 if (errno != ECONNREFUSED)
162 msg.tsp_seq = ntohs(msg.tsp_seq);
163 msg.tsp_time.tv_sec = ntohl(msg.tsp_time.tv_sec);
164 msg.tsp_time.tv_usec = ntohl(msg.tsp_time.tv_usec);
165 switch (msg.tsp_type) {
168 waittime = WAITDATEACK;
174 warnx("wrong ack received from timed: %s",
175 tsptype[msg.tsp_type]);
181 warnx("can't reach time daemon, time set locally");