1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * Portions of this source code were derived from Berkeley 4.3 BSD
32 * under license from the Regents of the University of California.
33 */
34
35 #pragma ident "%Z%%M% %I% %E% SMI"
36
37 #include <sys/types.h>
38 #include <sys/param.h>
39 #include <sys/socket.h>
40 #include <sys/sockio.h>
41 #include <sys/stat.h>
42 #include <sys/ioctl.h>
43 #include <sys/file.h>
44 #include <sys/loadavg.h>
45
46 #include <net/if.h>
47 #include <netinet/in.h>
48
49 #include <stdio.h>
50 #include <signal.h>
51 #include <errno.h>
52 #include <utmpx.h>
53 #include <ctype.h>
54 #include <netdb.h>
55 #include <syslog.h>
56 #include <fcntl.h>
57 #include <sys/isa_defs.h> /* for ENDIAN defines */
58 #include <arpa/inet.h>
59 #include <protocols/rwhod.h>
60
61 #include <strings.h>
62 #include <stdlib.h>
63 #include <unistd.h>
64
65 /*
66 * This version of Berkeley's rwhod has been modified to use IP multicast
67 * datagrams, under control of a new command-line option:
68 *
69 * rwhod -m causes rwhod to use IP multicast (instead of
70 * broadcast or unicast) on all interfaces that have
71 * the IFF_MULTICAST flag set in their "ifnet" structs
72 * (excluding the loopback interface). The multicast
73 * reports are sent with a time-to-live of 1, to prevent
74 * forwarding beyond the directly-connected subnet(s).
75 *
76 * rwhod -m <ttl> causes rwhod to send IP multicast datagrams with a
77 * time-to-live of <ttl>, via a SINGLE interface rather
78 * than all interfaces. <ttl> must be between 0 and
79 * MAX_MULTICAST_SCOPE, defined below. Note that "-m 1"
80 * is different than "-m", in that "-m 1" specifies
81 * transmission on one interface only.
82 *
83 * When "-m" is used without a <ttl> argument, the program accepts multicast
84 * rwhod reports from all multicast-capable interfaces. If a <ttl> argument
85 * is given, it accepts multicast reports from only one interface, the one
86 * on which reports are sent (which may be controlled via the host's routing
87 * table). Regardless of the "-m" option, the program accepts broadcast or
88 * unicast reports from all interfaces. Thus, this program will hear the
89 * reports of old, non-multicasting rwhods, but, if multicasting is used,
90 * those old rwhods won't hear the reports generated by this program.
91 *
92 * -- Steve Deering, Stanford University, February 1989
93 */
94
95 #define NO_MULTICAST 0 /* multicast modes */
96 #define PER_INTERFACE_MULTICAST 1
97 #define SCOPED_MULTICAST 2
98
99 #define MAX_MULTICAST_SCOPE 32 /* "site-wide", by convention */
100
101 #define INADDR_WHOD_GROUP (ulong_t)0xe0000103 /* 224.0.1.3 */
102 /* (belongs in protocols/rwhod.h) */
103
104 static int multicast_mode = NO_MULTICAST;
105 static int multicast_scope;
106 static struct sockaddr_in multicast_addr = { AF_INET };
107
108
109 /*
110 * Alarm interval. Don't forget to change the down time check in ruptime
111 * if this is changed.
112 */
113 #define AL_INTERVAL (3 * 60)
114
115 static struct sockaddr_in sin = { AF_INET };
116
117 static char myname[MAXHOSTNAMELEN];
118
119 /*
120 * We communicate with each neighbor in
121 * a list constructed at the time we're
122 * started up. Neighbors are currently
123 * directly connected via a hardware interface.
124 */
125 struct neighbor {
126 struct neighbor *n_next;
127 char *n_name; /* interface name */
128 char *n_addr; /* who to send to */
129 int n_addrlen; /* size of address */
130 ulong_t n_subnet; /* AF_INET subnet */
131 uint_t n_flags; /* should forward?, interface flags */
132 };
133
134 static struct neighbor *neighbors;
135 static struct whod mywd;
136 static struct servent *sp;
137 static int s;
138
139 #define WHDRSIZE (sizeof (mywd) - sizeof (mywd.wd_we))
140 #define RWHODIR "/var/spool/rwho"
141
142 static void onalrm(void);
143 static void getkmem(void);
144 static boolean_t configure(int);
145 static int verify(const struct whod *);
146
147 int
148 main(int argc, char *argv[])
149 {
150 struct sockaddr_in from;
151 struct stat st;
152 char path[64];
153 struct hostent *hp;
154 int on = 1;
155 char *cp;
156 struct stat sb;
157
158 if (getuid()) {
159 (void) fprintf(stderr, "in.rwhod: not super user\n");
160 exit(1);
161 }
162 sp = getservbyname("who", "udp");
163 if (sp == NULL) {
164 (void) fprintf(stderr, "in.rwhod: udp/who: unknown service\n");
165 exit(1);
166 }
167 argv++;
168 argc--;
169 while (argc > 0 && *argv[0] == '-') {
170 if (strcmp(*argv, "-m") == 0) {
171 if (argc > 1 && isdigit(*(argv + 1)[0])) {
172 argv++;
173 argc--;
174 multicast_mode = SCOPED_MULTICAST;
175 multicast_scope = atoi(*argv);
176 if (multicast_scope > MAX_MULTICAST_SCOPE) {
177 (void) fprintf(stderr,
178 "in.rwhod: "
179 "ttl must not exceed %u\n",
180 MAX_MULTICAST_SCOPE);
181 exit(1);
182 }
183 } else {
184 multicast_mode = PER_INTERFACE_MULTICAST;
185 }
186 } else {
187 goto usage;
188 }
189 argv++;
190 argc--;
191 }
192 if (argc > 0)
193 goto usage;
194 if (chdir(RWHODIR) < 0) {
195 perror(RWHODIR);
196 exit(1);
197 }
198 #ifndef DEBUG
199 if (fork())
200 exit(0);
201 /* CSTYLED */
202 {
203 (void) close(0);
204 (void) close(1);
205 (void) close(2);
206 (void) open("/", 0);
207 (void) dup2(0, 1);
208 (void) dup2(0, 2);
209 (void) setsid();
210 }
211 #endif
212 (void) sigset(SIGHUP, (void (*)())getkmem);
213 openlog("in.rwhod", LOG_PID, LOG_DAEMON);
214 /*
215 * Establish host name as returned by system.
216 */
217 if (gethostname(myname, sizeof (myname) - 1) < 0) {
218 syslog(LOG_ERR, "main: gethostname: %m");
219 exit(1);
220 }
221 if ((cp = index(myname, '.')) != NULL)
222 *cp = '\0';
223 (void) strlcpy(mywd.wd_hostname, myname, sizeof (mywd.wd_hostname));
224
225 if (stat(UTMPX_FILE, &sb) < 0) {
226 syslog(LOG_ERR, "main: stat: %s: %m", UTMPX_FILE);
227 exit(1);
228 }
229 getkmem();
230 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
231 syslog(LOG_ERR, "main: socket: %m");
232 exit(1);
233 }
234 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) {
235 syslog(LOG_ERR, "main: setsockopt SO_BROADCAST: %m");
236 exit(1);
237 }
238 hp = gethostbyname(myname);
239 if (hp == NULL) {
240 syslog(LOG_ERR, "main: %s: don't know my own name\n", myname);
241 exit(1);
242 }
243 sin.sin_family = hp->h_addrtype;
244 sin.sin_port = sp->s_port;
245 if (bind(s, (struct sockaddr *)&sin, sizeof (sin)) < 0) {
246 syslog(LOG_ERR, "main: bind: %m");
247 exit(1);
248 }
249 if (!configure(s))
250 exit(1);
251 (void) sigset(SIGALRM, (void (*)())onalrm);
252 onalrm();
253 for (;;) {
254 struct whod wd;
255 int cc, whod;
256 socklen_t len = sizeof (from);
257
258 cc = recvfrom(s, &wd, sizeof (struct whod), 0,
259 (struct sockaddr *)&from, &len);
260 if (cc <= 0) {
261 if (cc < 0 && errno != EINTR)
262 syslog(LOG_WARNING, "main: recvfrom: %m");
263 continue;
264 }
265 if (from.sin_port != sp->s_port) {
266 syslog(LOG_WARNING, "main: %d: bad from port",
267 ntohs(from.sin_port));
268 continue;
269 }
270 #ifdef notdef
271 if (gethostbyname(wd.wd_hostname) == 0) {
272 syslog(LOG_WARNING, "main: %s: unknown host",
273 wd.wd_hostname);
274 continue;
275 }
276 #endif
277 if (wd.wd_vers != WHODVERSION)
278 continue;
279 if (wd.wd_type != WHODTYPE_STATUS)
280 continue;
281 if (!verify(&wd)) {
282 syslog(LOG_WARNING, "main: malformed host name from %x",
283 from.sin_addr.s_addr);
284 continue;
285 }
286 (void) sprintf(path, "whod.%s", wd.wd_hostname);
287 /*
288 * Rather than truncating and growing the file each time,
289 * use ftruncate if size is less than previous size.
290 */
291 whod = open(path, O_WRONLY | O_CREAT, 0644);
292 if (whod < 0) {
293 syslog(LOG_WARNING, "main: open: %s: %m", path);
294 continue;
295 }
296 #if defined(_LITTLE_ENDIAN)
297 /* CSTYLED */
298 {
299 int i, n = (cc - WHDRSIZE)/sizeof (struct whoent);
300 struct whoent *we;
301
302 /* undo header byte swapping before writing to file */
303 wd.wd_sendtime = ntohl(wd.wd_sendtime);
304 for (i = 0; i < 3; i++)
305 wd.wd_loadav[i] = ntohl(wd.wd_loadav[i]);
306 wd.wd_boottime = ntohl(wd.wd_boottime);
307 we = wd.wd_we;
308 for (i = 0; i < n; i++) {
309 we->we_idle = ntohl(we->we_idle);
310 we->we_utmp.out_time =
311 ntohl(we->we_utmp.out_time);
312 we++;
313 }
314 }
315 #endif
316 (void) time((time_t *)&wd.wd_recvtime);
317 (void) write(whod, &wd, cc);
318 if (fstat(whod, &st) < 0 || st.st_size > cc)
319 (void) ftruncate(whod, cc);
320 (void) close(whod);
321 }
322 /* NOTREACHED */
323 usage:
324 (void) fprintf(stderr, "usage: in.rwhod [ -m [ ttl ] ]\n");
325 return (1);
326 }
327
328 /*
329 * Check out host name for unprintables
330 * and other funnies before allowing a file
331 * to be created. Sorry, but blanks aren't allowed.
332 */
333 static int
334 verify(const struct whod *wd)
335 {
336 int size = 0;
337 const char *name = wd->wd_hostname;
338
339 /*
340 * We shouldn't assume the name is NUL terminated, so bound the
341 * checks at the size of the whod structures wd_hostname field.
342 */
343 while ((size < sizeof (wd->wd_hostname)) &&
344 (*name != '\0')) {
345 if (*name == '/' || !isascii(*name) ||
346 !(isalnum(*name) || ispunct(*name)))
347 return (0);
348 name++, size++;
349 }
350 /*
351 * Fail the verification if NULL name or it wasn't NUL terminated.
352 */
353 return ((size > 0) && (size < sizeof (wd->wd_hostname)));
354 }
355
356 static int utmpxtime;
357 static int utmpxent;
358 static int alarmcount;
359 struct utmpx *utmpx;
360
361 static void
362 onalrm(void)
363 {
364 int i;
365 struct stat stb;
366 int utmpxsize = 0;
367 int entries;
368 struct utmpx *utp;
369 struct utmpx *utmpxbegin;
370 struct whoent *we = mywd.wd_we, *wlast;
371 int cc, cnt;
372 double avenrun[3];
373
374 time_t now = time(0);
375 struct neighbor *np;
376
377 if (alarmcount % 10 == 0)
378 getkmem();
379 alarmcount++;
380 (void) stat(UTMPX_FILE, &stb);
381 entries = stb.st_size / sizeof (struct futmpx);
382 if ((stb.st_mtime != utmpxtime) || (entries > utmpxent)) {
383 utmpxtime = stb.st_mtime;
384 if (entries > utmpxent) {
385 utmpxent = entries;
386 utmpxsize = utmpxent * sizeof (struct utmpx);
387 utmpx = realloc(utmpx, utmpxsize);
388 if (utmpx == NULL) {
389 syslog(LOG_ERR, "onalrm: realloc: %m");
390 utmpxsize = 0;
391 goto done;
392 }
393 }
394 utmpxbegin = utmpx;
395 setutxent();
396 cnt = 0;
397 while (cnt++ < utmpxent && (utp = getutxent()) != NULL)
398 (void) memcpy(utmpxbegin++, utp, sizeof (struct utmpx));
399 endutxent();
400 wlast = &mywd.wd_we[1024 / sizeof (struct whoent) - 1];
401 for (i = 0; i < utmpxent; i++) {
402 if (utmpx[i].ut_name[0] &&
403 utmpx[i].ut_type == USER_PROCESS) {
404 /*
405 * XXX - utmpx name and line lengths should
406 * be here
407 */
408 bcopy(utmpx[i].ut_line, we->we_utmp.out_line,
409 sizeof (we->we_utmp.out_line));
410 bcopy(utmpx[i].ut_name, we->we_utmp.out_name,
411 sizeof (we->we_utmp.out_name));
412 we->we_utmp.out_time =
413 htonl(utmpx[i].ut_xtime);
414 if (we >= wlast)
415 break;
416 we++;
417 }
418 }
419 utmpxent = we - mywd.wd_we;
420 }
421
422 /*
423 * The test on utmpxent looks silly---after all, if no one is
424 * logged on, why worry about efficiency?---but is useful on
425 * (e.g.) compute servers.
426 */
427 if (utmpxent > 0 && chdir("/dev") == -1) {
428 syslog(LOG_ERR, "onalrm: chdir /dev: %m");
429 exit(1);
430 }
431 we = mywd.wd_we;
432 for (i = 0; i < utmpxent; i++) {
433 if (stat(we->we_utmp.out_line, &stb) >= 0)
434 we->we_idle = htonl(now - stb.st_atime);
435 we++;
436 }
437 if (getloadavg(avenrun, 3) == -1) {
438 syslog(LOG_ERR, "onalrm: getloadavg: %m");
439 exit(1);
440 }
441
442 for (i = 0; i < 3; i++)
443 mywd.wd_loadav[i] = htonl((ulong_t)(avenrun[i] * 100));
444 cc = (char *)we - (char *)&mywd;
445 mywd.wd_sendtime = htonl(time(0));
446 mywd.wd_vers = WHODVERSION;
447 mywd.wd_type = WHODTYPE_STATUS;
448 if (multicast_mode == SCOPED_MULTICAST) {
449 (void) sendto(s, &mywd, cc, 0,
450 (struct sockaddr *)&multicast_addr,
451 sizeof (multicast_addr));
452 } else for (np = neighbors; np != NULL; np = np->n_next) {
453 if (multicast_mode == PER_INTERFACE_MULTICAST &&
454 np->n_flags & IFF_MULTICAST) {
455 /*
456 * Select the outgoing interface for the multicast.
457 */
458 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF,
459 &(((struct sockaddr_in *)np->n_addr)->sin_addr),
460 sizeof (struct in_addr)) < 0) {
461 syslog(LOG_ERR,
462 "onalrm: setsockopt IP_MULTICAST_IF: %m");
463 exit(1);
464 }
465 (void) sendto(s, &mywd, cc, 0,
466 (struct sockaddr *)&multicast_addr,
467 sizeof (multicast_addr));
468 } else {
469 (void) sendto(s, &mywd, cc, 0,
470 (struct sockaddr *)np->n_addr, np->n_addrlen);
471 }
472 }
473 if (utmpxent > 0 && chdir(RWHODIR) == -1) {
474 syslog(LOG_ERR, "onalrm: chdir %s: %m", RWHODIR);
475 exit(1);
476 }
477 done:
478 (void) alarm(AL_INTERVAL);
479 }
480
481 static void
482 getkmem(void)
483 {
484 struct utmpx *utmpx, utmpx_id;
485
486 utmpx_id.ut_type = BOOT_TIME;
487 if ((utmpx = getutxid(&utmpx_id)) != NULL)
488 mywd.wd_boottime = utmpx->ut_xtime;
489 endutxent();
490 mywd.wd_boottime = htonl(mywd.wd_boottime);
491 }
492
493 /*
494 * Figure out device configuration and select
495 * networks which deserve status information.
496 */
497 static boolean_t
498 configure(int s)
499 {
500 char *buf;
501 struct ifconf ifc;
502 struct ifreq ifreq, *ifr;
503 struct sockaddr_in *sin;
504 struct neighbor *np;
505 struct neighbor *np2;
506 int n;
507 int numifs;
508 unsigned bufsize;
509
510 if (multicast_mode == SCOPED_MULTICAST) {
511 struct ip_mreq mreq;
512 unsigned char ttl;
513
514 mreq.imr_multiaddr.s_addr = htonl(INADDR_WHOD_GROUP);
515 mreq.imr_interface.s_addr = htonl(INADDR_ANY);
516 if (setsockopt(s, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq,
517 sizeof (mreq)) < 0) {
518 syslog(LOG_ERR,
519 "configure: setsockopt IP_ADD_MEMBERSHIP: %m");
520 return (B_FALSE);
521 }
522 ttl = multicast_scope;
523 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &ttl,
524 sizeof (ttl)) < 0) {
525 syslog(LOG_ERR,
526 "configure: setsockopt IP_MULTICAST_TTL: %m");
527 return (B_FALSE);
528 }
529 multicast_addr.sin_addr.s_addr = htonl(INADDR_WHOD_GROUP);
530 multicast_addr.sin_port = sp->s_port;
531 return (B_TRUE);
532 }
533
534 if (ioctl(s, SIOCGIFNUM, (char *)&numifs) < 0) {
535 syslog(LOG_ERR, "configure: ioctl SIOCGIFNUM: %m");
536 return (B_FALSE);
537 }
538 bufsize = numifs * sizeof (struct ifreq);
539 buf = malloc(bufsize);
540 if (buf == NULL) {
541 syslog(LOG_ERR, "configure: malloc: %m");
542 return (B_FALSE);
543 }
544 ifc.ifc_len = bufsize;
545 ifc.ifc_buf = buf;
546 if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) {
547 syslog(LOG_ERR,
548 "configure: ioctl (get interface configuration): %m");
549 (void) free(buf);
550 return (B_FALSE);
551 }
552 ifr = ifc.ifc_req;
553 for (n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++) {
554 /* Skip all logical interfaces */
555 if (index(ifr->ifr_name, ':') != NULL)
556 continue;
557
558 for (np = neighbors; np != NULL; np = np->n_next) {
559 if (np->n_name &&
560 strcmp(ifr->ifr_name, np->n_name) == 0)
561 break;
562 }
563 if (np != NULL)
564 continue;
565 ifreq = *ifr;
566 np = (struct neighbor *)malloc(sizeof (*np));
567 if (np == NULL)
568 continue;
569 np->n_name = malloc(strlen(ifr->ifr_name) + 1);
570 if (np->n_name == NULL) {
571 free(np);
572 continue;
573 }
574 (void) strcpy(np->n_name, ifr->ifr_name);
575 np->n_addrlen = sizeof (ifr->ifr_addr);
576 np->n_addr = malloc(np->n_addrlen);
577 if (np->n_addr == NULL) {
578 free(np->n_name);
579 free(np);
580 continue;
581 }
582 bcopy(&ifr->ifr_addr, np->n_addr, np->n_addrlen);
583 if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
584 syslog(LOG_ERR,
585 "configure: ioctl (get interface flags): %m");
586 free(np->n_addr);
587 free(np->n_name);
588 free(np);
589 continue;
590 }
591 np->n_flags = ifreq.ifr_flags;
592 if (((struct sockaddr_in *)np->n_addr)->sin_family == AF_INET &&
593 ioctl(s, SIOCGIFNETMASK, (char *)&ifreq) >= 0) {
594 sin = (struct sockaddr_in *)np->n_addr;
595
596 np->n_subnet = sin->sin_addr.s_addr &
597 ((struct sockaddr_in *)&ifreq.ifr_addr)->
598 sin_addr.s_addr;
599 }
600 if (multicast_mode == PER_INTERFACE_MULTICAST &&
601 (np->n_flags & IFF_UP) &&
602 (np->n_flags & IFF_MULTICAST) &&
603 !(np->n_flags & IFF_LOOPBACK)) {
604 struct ip_mreq mreq;
605
606 /*
607 * Skip interfaces that have matching subnets i.e.
608 * (addr & netmask) are identical.
609 * Such interfaces are connected to the same
610 * physical wire.
611 */
612 for (np2 = neighbors; np2 != NULL; np2 = np2->n_next) {
613
614 if (!(np->n_flags & IFF_POINTOPOINT) &&
615 !(np2->n_flags & IFF_POINTOPOINT) &&
616 (np->n_subnet == np2->n_subnet)) {
617 free(np->n_addr);
618 free(np->n_name);
619 free(np);
620 break;
621 }
622 }
623 if (np2 != NULL)
624 continue;
625
626 mreq.imr_multiaddr.s_addr = htonl(INADDR_WHOD_GROUP);
627 mreq.imr_interface.s_addr =
628 ((struct sockaddr_in *)np->n_addr)->sin_addr.s_addr;
629 if (setsockopt(s, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq,
630 sizeof (mreq)) < 0) {
631 syslog(LOG_ERR,
632 "configure: "
633 "setsockopt IP_ADD_MEMBERSHIP: %m");
634 free(np->n_addr);
635 free(np->n_name);
636 free(np);
637 continue;
638 }
639 multicast_addr.sin_addr.s_addr =
640 htonl(INADDR_WHOD_GROUP);
641 multicast_addr.sin_port = sp->s_port;
642 np->n_next = neighbors;
643 neighbors = np;
644 continue;
645 }
646 if ((np->n_flags & IFF_UP) == 0 ||
647 (np->n_flags & (IFF_BROADCAST|IFF_POINTOPOINT)) == 0) {
648 free(np->n_addr);
649 free(np->n_name);
650 free(np);
651 continue;
652 }
653 if (np->n_flags & IFF_POINTOPOINT) {
654 if (ioctl(s, SIOCGIFDSTADDR, (char *)&ifreq) < 0) {
655 syslog(LOG_ERR,
656 "configure: ioctl (get dstaddr): %m");
657 free(np->n_addr);
658 free(np->n_name);
659 free(np);
660 continue;
661 }
662 /* we assume addresses are all the same size */
663 bcopy(&ifreq.ifr_dstaddr, np->n_addr, np->n_addrlen);
664 }
665 if (np->n_flags & IFF_BROADCAST) {
666 if (ioctl(s, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
667 syslog(LOG_ERR,
668 "configure: ioctl (get broadaddr): %m");
669 free(np->n_addr);
670 free(np->n_name);
671 free(np);
672 continue;
673 }
674 /* we assume addresses are all the same size */
675 bcopy(&ifreq.ifr_broadaddr, np->n_addr, np->n_addrlen);
676 }
677 /* gag, wish we could get rid of Internet dependencies */
678 sin = (struct sockaddr_in *)np->n_addr;
679 sin->sin_port = sp->s_port;
680
681 /*
682 * Avoid adding duplicate broadcast and pt-pt destinations
683 * to the list.
684 */
685 for (np2 = neighbors; np2 != NULL; np2 = np2->n_next) {
686 struct sockaddr_in *sin2;
687
688 sin2 = (struct sockaddr_in *)np2->n_addr;
689 if (sin2->sin_addr.s_addr == sin->sin_addr.s_addr) {
690 free(np->n_addr);
691 free(np->n_name);
692 free(np);
693 break;
694 }
695 }
696 if (np2 != NULL)
697 continue;
698
699 np->n_next = neighbors;
700 neighbors = np;
701 }
702 (void) free(buf);
703 return (B_TRUE);
704 }
705
706 #ifdef DEBUG
707 static char *interval(uint_t, char *);
708
709 /* ARGSUSED */
710 static ssize_t
711 sendto(int s, const void *buf, size_t cc, int flags, const struct sockaddr *to,
712 socklen_t tolen)
713 {
714 struct whod *w = (struct whod *)buf;
715 struct whoent *we;
716 struct sockaddr_in *sin = (struct sockaddr_in *)to;
717 int nsz;
718
719 (void) printf("sendto %x.%d\n", ntohl(sin->sin_addr.s_addr),
720 ntohs(sin->sin_port));
721 (void) printf("hostname %s %s\n", w->wd_hostname,
722 interval(ntohl(w->wd_sendtime) - ntohl(w->wd_boottime), " up"));
723 (void) printf("load %4.2f, %4.2f, %4.2f\n",
724 ntohl(w->wd_loadav[0]) / 100.0, ntohl(w->wd_loadav[1]) / 100.0,
725 ntohl(w->wd_loadav[2]) / 100.0);
726 cc -= WHDRSIZE;
727 for (we = w->wd_we, cc /= sizeof (struct whoent); cc > 0; cc--, we++) {
728 time_t t = ntohl(we->we_utmp.out_time);
729
730 nsz = sizeof (we->we_utmp.out_name);
731 (void) printf("%-*.*s %s:%s %.12s",
732 nsz,
733 nsz,
734 we->we_utmp.out_name,
735 w->wd_hostname,
736 we->we_utmp.out_line,
737 ctime(&t)+4);
738 we->we_idle = ntohl(we->we_idle) / 60;
739 if (we->we_idle) {
740 if (we->we_idle >= 100*60)
741 we->we_idle = 100*60 - 1;
742 if (we->we_idle >= 60)
743 (void) printf(" %2d", we->we_idle / 60);
744 else
745 (void) printf(" ");
746 (void) printf(":%02d", we->we_idle % 60);
747 }
748 (void) printf("\n");
749 }
750 return (0);
751 }
752
753 static char *
754 interval(uint_t time, char *updown)
755 {
756 static char resbuf[32];
757 int days, hours, minutes;
758
759 if (time > 3*30*24*60*60) {
760 (void) sprintf(resbuf, " %s ??:??", updown);
761 return (resbuf);
762 }
763 minutes = (time + 59) / 60; /* round to minutes */
764 hours = minutes / 60;
765 minutes %= 60;
766 days = hours / 24;
767 hours %= 24;
768 if (days > 0) {
769 (void) sprintf(resbuf, "%s %2d+%02d:%02d",
770 updown, days, hours, minutes);
771 } else {
772 (void) sprintf(resbuf, "%s %2d:%02d",
773 updown, hours, minutes);
774 }
775 return (resbuf);
776 }
777 #endif