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 2002 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 void 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 exit(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 778