2 * Copyright (c) 1985, 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 * @(#)cmds.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.sbin/timed/timedc/cmds.c,v 1.6.2.2 2001/08/31 08:02:06 kris Exp $
35 * $DragonFly: src/usr.sbin/timed/timedc/cmds.c,v 1.2 2003/06/17 04:30:03 dillon Exp $
41 #include <netinet/in_systm.h>
42 #include <netinet/ip.h>
43 #include <netinet/ip_icmp.h>
51 #include <protocols/timed.h>
55 #include <sys/clock.h>
58 #define SECDAY (24*SECHR)
61 # define DATE_PROTO "udp"
62 # define DATE_PORT "time"
67 char myname[MAXHOSTNAMELEN];
69 struct sockaddr_in server;
70 struct sockaddr_in dayaddr;
71 extern int measure_delta;
73 void bytenetorder(struct tsp *);
74 void bytehostorder(struct tsp *);
77 #define BU (2208988800UL) /* seconds before UNIX epoch */
80 /* compute the difference between our date and another machine
82 static int /* difference in days from our time */
88 struct timeval tout, now;
95 /* wait 2 seconds between 10 tries */
98 for (trials = 0; trials < 10; trials++) {
99 /* ask for the time */
101 if (sendto(sock, &sec, sizeof(sec), 0,
102 (struct sockaddr*)&dayaddr, sizeof(dayaddr)) < 0) {
103 warn("sendto(sock)");
109 FD_SET(sock, &ready);
110 i = select(sock+1, &ready, (fd_set *)0,
115 warn("select(date read)");
121 fromlen = sizeof(from);
122 if (recvfrom(sock,&sec,sizeof(sec),0,
123 &from,&fromlen) < 0) {
124 warn("recvfrom(date read)");
130 warnx("%s says it is before 1970: %lu",
136 (void)gettimeofday(&now, (struct timezone*)0);
137 return (sec - now.tv_sec);
141 /* if we get here, we tried too many times */
142 warnx("%s will not tell us the date", hostname);
148 * Clockdiff computes the difference between the time of the machine on
149 * which it is called and the time of the machines given as argument.
150 * The time differences measured by clockdiff are obtained using a sequence
151 * of ICMP TSTAMP messages which are returned to the sender by the IP module
152 * in the remote machine.
153 * In order to compare clocks of machines in different time zones, the time
154 * is transmitted (as a 32-bit value) in milliseconds since midnight UT.
155 * If a hosts uses a different time format, it should set the high order
156 * bit of the 32-bit quantity it transmits.
157 * However, VMS apparently transmits the time in milliseconds since midnight
158 * local time (rather than GMT) without setting the high order bit.
159 * Furthermore, it does not understand daylight-saving time. This makes
160 * clockdiff behaving inconsistently with hosts running VMS.
162 * In order to reduce the sensitivity to the variance of message transmission
163 * time, clockdiff sends a sequence of messages. Yet, measures between
164 * two `distant' hosts can be affected by a small error. The error can,
165 * however, be reduced by increasing the number of messages sent in each
169 clockdiff(argc, argv)
174 extern int measure(u_long, u_long, char *, struct sockaddr_in*, int);
175 register int avg_cnt;
180 printf("usage: timedc clockdiff host ...\n");
184 if (gethostname(myname, sizeof(myname) - 1) < 0)
185 err(1, "gethostname");
187 /* get the address for the date ready */
188 sp = getservbyname(DATE_PORT, DATE_PROTO);
190 warnx("%s/%s is an unknown service", DATE_PORT, DATE_PROTO);
191 dayaddr.sin_port = 0;
193 dayaddr.sin_port = sp->s_port;
198 hp = gethostbyname(*argv);
200 warnx("%s: %s", *argv, hstrerror(h_errno));
204 server.sin_family = hp->h_addrtype;
205 bcopy(hp->h_addr, &server.sin_addr.s_addr, hp->h_length);
206 for (avg_cnt = 0, avg = 0; avg_cnt < 16; avg_cnt++) {
207 measure_status = measure(10000,100, *argv, &server, 1);
208 if (measure_status != GOOD)
210 avg += measure_delta;
212 if (measure_status == GOOD)
213 measure_delta = avg/avg_cnt;
215 switch (measure_status) {
217 printf("%s is down\n", hp->h_name);
220 printf("%s transmitts a non-standard time format\n",
224 printf("%s is unreachable\n", hp->h_name);
229 * Try to get the date only after using ICMP timestamps to
230 * get the time. This is because the date protocol
233 if (dayaddr.sin_port != 0) {
234 dayaddr.sin_family = hp->h_addrtype;
235 bcopy(hp->h_addr, &dayaddr.sin_addr.s_addr,
237 avg = daydiff(*argv);
239 printf("time on %s is %ld days ahead %s\n",
240 hp->h_name, avg/SECDAY, myname);
242 } else if (avg < -SECDAY) {
243 printf("time on %s is %ld days behind %s\n",
244 hp->h_name, -avg/SECDAY, myname);
249 if (measure_delta > 0) {
250 printf("time on %s is %d ms. ahead of time on %s\n",
251 hp->h_name, measure_delta, myname);
252 } else if (measure_delta == 0) {
253 printf("%s and %s have the same time\n",
256 printf("time on %s is %d ms. behind time on %s\n",
257 hp->h_name, -measure_delta, myname);
265 * finds location of master timedaemon
274 struct sockaddr_in dest;
276 struct sockaddr_in from;
279 struct servent *srvp;
283 printf("usage: timedc msite [host ...]\n");
287 srvp = getservbyname("timed", "udp");
289 warnx("udp/timed: unknown service");
292 dest.sin_port = srvp->s_port;
293 dest.sin_family = AF_INET;
295 if (gethostname(myname, sizeof(myname) - 1) < 0)
296 err(1, "gethostname");
299 tgtname = (i >= argc) ? myname : argv[i];
300 hp = gethostbyname(tgtname);
302 warnx("%s: %s", tgtname, hstrerror(h_errno));
305 bcopy(hp->h_addr, &dest.sin_addr.s_addr, hp->h_length);
307 (void)strlcpy(msg.tsp_name, myname, sizeof(msg.tsp_name));
308 msg.tsp_type = TSP_MSITE;
309 msg.tsp_vers = TSPVERSION;
311 if (sendto(sock, &msg, sizeof(struct tsp), 0,
312 (struct sockaddr*)&dest,
313 sizeof(struct sockaddr)) < 0) {
321 FD_SET(sock, &ready);
322 if (select(FD_SETSIZE, &ready, (fd_set *)0, (fd_set *)0,
324 length = sizeof(from);
325 cc = recvfrom(sock, &msg, sizeof(struct tsp), 0,
326 (struct sockaddr *)&from, &length);
332 * The 4.3BSD protocol spec had a 32-byte tsp_name field, and
333 * this is still OS-dependent. Demand that the packet is at
334 * least long enough to hold a 4.3BSD packet.
336 if (cc < (sizeof(struct tsp) - MAXHOSTNAMELEN + 32)) {
338 "short packet (%u/%u bytes) from %s\n",
339 cc, sizeof(struct tsp) - MAXHOSTNAMELEN + 32,
340 inet_ntoa(from.sin_addr));
344 if (msg.tsp_type == TSP_ACK) {
345 printf("master timedaemon at %s is %s\n",
346 tgtname, msg.tsp_name);
348 if (msg.tsp_type >= TSPTYPENUMBER)
349 printf("unknown ack received: %u\n",
352 printf("wrong ack received: %s\n",
353 tsptype[msg.tsp_type]);
356 printf("communication error with %s\n", tgtname);
358 } while (++i < argc);
372 * Causes the election timer to expire on the selected hosts
373 * It sends just one udp message per machine, relying on
374 * reliability of communication channel.
381 struct servent *srvp;
382 struct sockaddr_in sin;
386 printf("usage: timedc election host1 [host2 ...]\n");
390 srvp = getservbyname("timed", "udp");
392 warnx("udp/timed: unknown service");
398 hp = gethostbyname(*argv);
400 warnx("%s: %s", *argv, hstrerror(h_errno));
404 sin.sin_port = srvp->s_port;
405 sin.sin_family = hp->h_addrtype;
406 bcopy(hp->h_addr, &sin.sin_addr.s_addr, hp->h_length);
408 msg.tsp_type = TSP_TEST;
409 msg.tsp_vers = TSPVERSION;
410 if (gethostname(myname, sizeof(myname) - 1) < 0)
411 err(1, "gethostname");
412 (void)strlcpy(msg.tsp_name, myname, sizeof(msg.tsp_name));
414 if (sendto(sock, &msg, sizeof(struct tsp), 0,
415 (struct sockaddr*)&sin,
416 sizeof(struct sockaddr)) < 0) {
424 * Enables or disables tracing on local timedaemon
435 struct sockaddr_in dest;
436 struct sockaddr_in from;
439 struct servent *srvp;
442 printf("usage: timedc trace { on | off }\n");
446 srvp = getservbyname("timed", "udp");
448 warnx("udp/timed: unknown service");
451 dest.sin_port = srvp->s_port;
452 dest.sin_family = AF_INET;
454 if (gethostname(myname, sizeof(myname) - 1) < 0)
455 err(1, "gethostname");
456 hp = gethostbyname(myname);
457 bcopy(hp->h_addr, &dest.sin_addr.s_addr, hp->h_length);
459 if (strcmp(argv[1], "on") == 0) {
460 msg.tsp_type = TSP_TRACEON;
463 msg.tsp_type = TSP_TRACEOFF;
467 (void)strcpy(msg.tsp_name, myname);
468 msg.tsp_vers = TSPVERSION;
470 if (sendto(sock, &msg, sizeof(struct tsp), 0,
471 (struct sockaddr*)&dest, sizeof(struct sockaddr)) < 0) {
479 FD_SET(sock, &ready);
480 if (select(FD_SETSIZE, &ready, (fd_set *)0, (fd_set *)0, &tout)) {
481 length = sizeof(from);
482 cc = recvfrom(sock, &msg, sizeof(struct tsp), 0,
483 (struct sockaddr *)&from, &length);
489 * The 4.3BSD protocol spec had a 32-byte tsp_name field, and
490 * this is still OS-dependent. Demand that the packet is at
491 * least long enough to hold a 4.3BSD packet.
493 if (cc < (sizeof(struct tsp) - MAXHOSTNAMELEN + 32)) {
494 fprintf(stderr, "short packet (%u/%u bytes) from %s\n",
495 cc, sizeof(struct tsp) - MAXHOSTNAMELEN + 32,
496 inet_ntoa(from.sin_addr));
500 if (msg.tsp_type == TSP_ACK)
502 printf("timed tracing enabled\n");
504 printf("timed tracing disabled\n");
506 if (msg.tsp_type >= TSPTYPENUMBER)
507 printf("unknown ack received: %u\n",
510 printf("wrong ack received: %s\n",
511 tsptype[msg.tsp_type]);
514 printf("communication error\n");
521 struct sockaddr_in sin;
523 sock = socket(AF_INET, SOCK_DGRAM, 0);
525 warn("opening socket");
529 sin.sin_family = AF_INET;
530 sin.sin_addr.s_addr = 0;
531 for (port = IPPORT_RESERVED - 1; port > IPPORT_RESERVED / 2; port--) {
532 sin.sin_port = htons((u_short)port);
533 if (bind(sock, (struct sockaddr*)&sin, sizeof (sin)) >= 0)
535 if (errno != EADDRINUSE && errno != EADDRNOTAVAIL) {
541 if (port == IPPORT_RESERVED / 2) {
542 warnx("all reserved ports in use");
547 sock_raw = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
549 warn("opening raw socket");