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 1.18 2004/04/06 20:06:45 markm Exp $
35 * $DragonFly: src/bin/date/netdate.c,v 1.8 2008/11/10 14:56:33 swildner 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 tmpsin
, dest
, from
;
75 int s
, port
, timed_ack
, found
, errn
;
77 char hostname
[MAXHOSTNAMELEN
];
79 if ((sp
= getservbyname("timed", "udp")) == NULL
) {
80 warnx("timed/udp: unknown service");
84 dest
.sin_port
= sp
->s_port
;
85 dest
.sin_family
= AF_INET
;
86 dest
.sin_addr
.s_addr
= htonl((u_long
)INADDR_ANY
);
87 s
= socket(AF_INET
, SOCK_DGRAM
, 0);
89 if (errno
!= EPROTONOSUPPORT
)
94 memset(&tmpsin
, 0, sizeof(tmpsin
));
95 tmpsin
.sin_family
= AF_INET
;
96 for (port
= IPPORT_RESERVED
- 1; port
> IPPORT_RESERVED
/ 2; port
--) {
97 tmpsin
.sin_port
= htons((u_short
)port
);
98 if (bind(s
, (struct sockaddr
*)&tmpsin
, sizeof(tmpsin
)) >= 0)
100 if (errno
== EADDRINUSE
)
102 if (errno
!= EADDRNOTAVAIL
)
106 if (port
== IPPORT_RESERVED
/ 2) {
107 warnx("all ports in use");
110 msg
.tsp_type
= TSP_SETDATE
;
111 msg
.tsp_vers
= TSPVERSION
;
112 if (gethostname(hostname
, sizeof(hostname
))) {
116 strncpy(msg
.tsp_name
, hostname
, sizeof(msg
.tsp_name
) - 1);
117 msg
.tsp_name
[sizeof(msg
.tsp_name
) - 1] = '\0';
118 msg
.tsp_seq
= htons((u_short
)0);
119 msg
.tsp_time
.tv_sec
= htonl((u_long
)tval
);
120 msg
.tsp_time
.tv_usec
= htonl((u_long
)0);
121 length
= sizeof(struct sockaddr_in
);
122 if (connect(s
, (struct sockaddr
*)&dest
, length
) < 0) {
126 if (send(s
, (char *)&msg
, sizeof(struct tsp
), 0) < 0) {
127 if (errno
!= ECONNREFUSED
)
135 tout
.tv_sec
= waittime
;
140 found
= select(FD_SETSIZE
, &ready
, NULL
, NULL
, &tout
);
142 length
= sizeof(errn
);
144 SOL_SOCKET
, SO_ERROR
, (char *)&errn
, &length
) && errn
) {
145 if (errn
!= ECONNREFUSED
)
146 warnc(errn
, "send (delayed error)");
150 if (found
> 0 && FD_ISSET(s
, &ready
)) {
151 length
= sizeof(struct sockaddr_in
);
152 if (recvfrom(s
, &msg
, sizeof(struct tsp
), 0,
153 (struct sockaddr
*)&from
, &length
) < 0) {
154 if (errno
!= ECONNREFUSED
)
158 msg
.tsp_seq
= ntohs(msg
.tsp_seq
);
159 msg
.tsp_time
.tv_sec
= ntohl(msg
.tsp_time
.tv_sec
);
160 msg
.tsp_time
.tv_usec
= ntohl(msg
.tsp_time
.tv_usec
);
161 switch (msg
.tsp_type
) {
164 waittime
= WAITDATEACK
;
170 warnx("wrong ack received from timed: %s",
171 tsptype
[msg
.tsp_type
]);
177 warnx("can't reach time daemon, time set locally");