1/* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31static const char copyright[] = 32"@(#) Copyright (c) 1983, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34#endif /* not lint */ 35 36#if 0 37#ifndef lint 38static char sccsid[] = "@(#)rwhod.c 8.1 (Berkeley) 6/6/93"; 39#endif /* not lint */ 40#endif 41 42#include <sys/cdefs.h> 43__FBSDID("$FreeBSD$"); 44 45#include <sys/param.h> 46#include <sys/socket.h> 47#include <sys/stat.h> 48#include <sys/signal.h> 49#include <sys/ioctl.h> 50#include <sys/sysctl.h> 51 52#include <net/if.h> 53#include <net/if_dl.h> 54#include <net/route.h> 55#include <netinet/in.h> 56#include <arpa/inet.h> 57#include <protocols/rwhod.h> 58 59#include <ctype.h> 60#include <err.h> 61#include <errno.h> 62#include <fcntl.h> 63#include <netdb.h> 64#include <paths.h> 65#include <stdio.h> 66#include <stdlib.h> 67#include <string.h> 68#include <syslog.h> 69#include <timeconv.h> 70#include <unistd.h> 71#include <utmpx.h> 72#include <pwd.h> 73#include <grp.h> 74 75/* 76 * This version of Berkeley's rwhod has been modified to use IP multicast 77 * datagrams, under control of a new command-line option: 78 * 79 * rwhod -m causes rwhod to use IP multicast (instead of 80 * broadcast or unicast) on all interfaces that have 81 * the IFF_MULTICAST flag set in their "ifnet" structs 82 * (excluding the loopback interface). The multicast 83 * reports are sent with a time-to-live of 1, to prevent 84 * forwarding beyond the directly-connected subnet(s). 85 * 86 * rwhod -m <ttl> causes rwhod to send IP multicast datagrams with a 87 * time-to-live of <ttl>, via a SINGLE interface rather 88 * than all interfaces. <ttl> must be between 0 and 89 * MAX_MULTICAST_SCOPE, defined below. Note that "-m 1" 90 * is different than "-m", in that "-m 1" specifies 91 * transmission on one interface only. 92 * 93 * When "-m" is used without a <ttl> argument, the program accepts multicast 94 * rwhod reports from all multicast-capable interfaces. If a <ttl> argument 95 * is given, it accepts multicast reports from only one interface, the one 96 * on which reports are sent (which may be controlled via the host's routing 97 * table). Regardless of the "-m" option, the program accepts broadcast or 98 * unicast reports from all interfaces. Thus, this program will hear the 99 * reports of old, non-multicasting rwhods, but, if multicasting is used, 100 * those old rwhods won't hear the reports generated by this program. 101 * 102 * -- Steve Deering, Stanford University, February 1989 103 */ 104 105#define UNPRIV_USER "daemon" 106#define UNPRIV_GROUP "daemon" 107 108#define NO_MULTICAST 0 /* multicast modes */ 109#define PER_INTERFACE_MULTICAST 1 110#define SCOPED_MULTICAST 2 111 112#define MAX_MULTICAST_SCOPE 32 /* "site-wide", by convention */ 113 114#define INADDR_WHOD_GROUP (u_long)0xe0000103 /* 224.0.1.3 */ 115 /* (belongs in protocols/rwhod.h) */ 116 117int insecure_mode; 118int quiet_mode; 119int iff_flag = IFF_POINTOPOINT; 120int multicast_mode = NO_MULTICAST; 121int multicast_scope; 122struct sockaddr_in multicast_addr = 123 { sizeof multicast_addr, AF_INET, 0, { 0 }, { 0 } }; 124 125/* 126 * Alarm interval. Don't forget to change the down time check in ruptime 127 * if this is changed. 128 */ 129#define AL_INTERVAL (3 * 60) 130 131char myname[MAXHOSTNAMELEN]; 132 133/* 134 * We communicate with each neighbor in a list constructed at the time we're 135 * started up. Neighbors are currently directly connected via a hardware 136 * interface. 137 */ 138struct neighbor { 139 struct neighbor *n_next; 140 char *n_name; /* interface name */ 141 struct sockaddr *n_addr; /* who to send to */ 142 int n_addrlen; /* size of address */ 143 int n_flags; /* should forward?, interface flags */ 144}; 145 146struct neighbor *neighbors; 147struct whod mywd; 148struct servent *sp; 149int s; 150 151#define WHDRSIZE (int)(sizeof(mywd) - sizeof(mywd.wd_we)) 152 153void run_as(uid_t *, gid_t *); 154int configure(int); 155void getboottime(int); 156void onalrm(int); 157void quit(const char *); 158void rt_xaddrs(caddr_t, caddr_t, struct rt_addrinfo *); 159int verify(char *, int); 160static void usage(void); 161#ifdef DEBUG 162char *interval(int, char *); 163void Sendto(int, const void *, size_t, int, const struct sockaddr *, int); 164#define sendto Sendto 165#endif 166 167int 168main(int argc, char *argv[]) 169{ 170 struct sockaddr_in from; 171 struct stat st; 172 char path[64]; 173 int on = 1; 174 char *cp; 175 struct sockaddr_in soin; 176 uid_t unpriv_uid; 177 gid_t unpriv_gid; 178 179 if (getuid()) 180 errx(1, "not super user"); 181 182 run_as(&unpriv_uid, &unpriv_gid); 183 184 argv++; argc--; 185 while (argc > 0 && *argv[0] == '-') { 186 if (strcmp(*argv, "-m") == 0) { 187 if (argc > 1 && isdigit(*(argv + 1)[0])) { 188 argv++, argc--; 189 multicast_mode = SCOPED_MULTICAST; 190 multicast_scope = atoi(*argv); 191 if (multicast_scope > MAX_MULTICAST_SCOPE) 192 errx(1, "ttl must not exceed %u", 193 MAX_MULTICAST_SCOPE); 194 } 195 else multicast_mode = PER_INTERFACE_MULTICAST; 196 } 197 else if (strcmp(*argv, "-i") == 0) 198 insecure_mode = 1; 199 else if (strcmp(*argv, "-l") == 0) 200 quiet_mode = 1; 201 else if (strcmp(*argv, "-p") == 0) 202 iff_flag = 0; 203 else 204 usage(); 205 argv++, argc--; 206 } 207 if (argc > 0) 208 usage(); 209#ifndef DEBUG 210 daemon(1, 0); 211#endif 212 (void) signal(SIGHUP, getboottime); 213 openlog("rwhod", LOG_PID, LOG_DAEMON); 214 sp = getservbyname("who", "udp"); 215 if (sp == NULL) { 216 syslog(LOG_ERR, "who/udp: unknown service"); 217 exit(1); 218 } 219 if (chdir(_PATH_RWHODIR) < 0) { 220 syslog(LOG_ERR, "%s: %m", _PATH_RWHODIR); 221 exit(1); 222 } 223 /* 224 * Establish host name as returned by system. 225 */ 226 if (gethostname(myname, sizeof(myname) - 1) < 0) { 227 syslog(LOG_ERR, "gethostname: %m"); 228 exit(1); 229 } 230 if ((cp = index(myname, '.')) != NULL) 231 *cp = '\0'; 232 strncpy(mywd.wd_hostname, myname, sizeof(mywd.wd_hostname) - 1); 233 mywd.wd_hostname[sizeof(mywd.wd_hostname) - 1] = '\0'; 234 getboottime(0); 235 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { 236 syslog(LOG_ERR, "socket: %m"); 237 exit(1); 238 } 239 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0) { 240 syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m"); 241 exit(1); 242 } 243 memset(&soin, 0, sizeof(soin)); 244 soin.sin_len = sizeof(soin); 245 soin.sin_family = AF_INET; 246 soin.sin_port = sp->s_port; 247 if (bind(s, (struct sockaddr *)&soin, sizeof(soin)) < 0) { 248 syslog(LOG_ERR, "bind: %m"); 249 exit(1); 250 } 251 if (setgid(unpriv_gid) != 0) { 252 syslog(LOG_ERR, "setgid: %m"); 253 exit(1); 254 } 255 if (setgroups(1, &unpriv_gid) != 0) { /* XXX BOGUS groups[0] = egid */ 256 syslog(LOG_ERR, "setgroups: %m"); 257 exit(1); 258 } 259 if (setuid(unpriv_uid) != 0) { 260 syslog(LOG_ERR, "setuid: %m"); 261 exit(1); 262 } 263 if (!configure(s)) 264 exit(1); 265 if (!quiet_mode) { 266 signal(SIGALRM, onalrm); 267 onalrm(0); 268 } 269 for (;;) { 270 struct whod wd; 271 socklen_t len = sizeof(from); 272 int cc, whod; 273 time_t t; 274 275 cc = recvfrom(s, (char *)&wd, sizeof(struct whod), 0, 276 (struct sockaddr *)&from, &len); 277 if (cc <= 0) { 278 if (cc < 0 && errno != EINTR) 279 syslog(LOG_WARNING, "recv: %m"); 280 continue; 281 } 282 if (from.sin_port != sp->s_port && !insecure_mode) { 283 syslog(LOG_WARNING, "%d: bad source port from %s", 284 ntohs(from.sin_port), inet_ntoa(from.sin_addr)); 285 continue; 286 } 287 if (cc < WHDRSIZE) { 288 syslog(LOG_WARNING, "short packet from %s", 289 inet_ntoa(from.sin_addr)); 290 continue; 291 } 292 if (wd.wd_vers != WHODVERSION) 293 continue; 294 if (wd.wd_type != WHODTYPE_STATUS) 295 continue; 296 if (!verify(wd.wd_hostname, sizeof wd.wd_hostname)) { 297 syslog(LOG_WARNING, "malformed host name from %s", 298 inet_ntoa(from.sin_addr)); 299 continue; 300 } 301 (void) snprintf(path, sizeof path, "whod.%s", wd.wd_hostname); 302 /* 303 * Rather than truncating and growing the file each time, 304 * use ftruncate if size is less than previous size. 305 */ 306 whod = open(path, O_WRONLY | O_CREAT, 0644); 307 if (whod < 0) { 308 syslog(LOG_WARNING, "%s: %m", path); 309 continue; 310 } 311#if ENDIAN != BIG_ENDIAN 312 { 313 int i, n = (cc - WHDRSIZE)/sizeof(struct whoent); 314 struct whoent *we; 315 316 /* undo header byte swapping before writing to file */ 317 wd.wd_sendtime = ntohl(wd.wd_sendtime); 318 for (i = 0; i < 3; i++) 319 wd.wd_loadav[i] = ntohl(wd.wd_loadav[i]); 320 wd.wd_boottime = ntohl(wd.wd_boottime); 321 we = wd.wd_we; 322 for (i = 0; i < n; i++) { 323 we->we_idle = ntohl(we->we_idle); 324 we->we_utmp.out_time = 325 ntohl(we->we_utmp.out_time); 326 we++; 327 } 328 } 329#endif 330 (void) time(&t); 331 wd.wd_recvtime = _time_to_int(t); 332 (void) write(whod, (char *)&wd, cc); 333 if (fstat(whod, &st) < 0 || st.st_size > cc) 334 ftruncate(whod, cc); 335 (void) close(whod); 336 } 337} 338 339static void 340usage() 341{ 342 fprintf(stderr, "usage: rwhod [-i] [-p] [-l] [-m [ttl]]\n"); 343 exit(1); 344} 345 346void 347run_as(uid, gid) 348 uid_t *uid; 349 gid_t *gid; 350{ 351 struct passwd *pw; 352 struct group *gr; 353 354 pw = getpwnam(UNPRIV_USER); 355 if (!pw) { 356 syslog(LOG_ERR, "getpwnam(%s): %m", UNPRIV_USER); 357 exit(1); 358 } 359 *uid = pw->pw_uid; 360 361 gr = getgrnam(UNPRIV_GROUP); 362 if (!gr) { 363 syslog(LOG_ERR, "getgrnam(%s): %m", UNPRIV_GROUP); 364 exit(1); 365 } 366 *gid = gr->gr_gid; 367} 368 369/* 370 * Check out host name for unprintables 371 * and other funnies before allowing a file 372 * to be created. Sorry, but blanks aren't allowed. 373 */ 374int 375verify(name, maxlen) 376 register char *name; 377 register int maxlen; 378{ 379 register int size = 0; 380 381 while (*name && size < maxlen - 1) { 382 if (!isascii(*name) || !(isalnum(*name) || ispunct(*name))) 383 return (0); 384 name++, size++; 385 } 386 *name = '\0'; 387 return (size > 0); 388} 389 390void 391onalrm(int signo __unused) 392{ 393 struct neighbor *np; 394 struct whoent *we = mywd.wd_we, *wend; 395 struct stat stb; 396 struct utmpx *ut; 397 static int alarmcount = 0; 398 double avenrun[3]; 399 time_t now; 400 int i, cc; 401 402 now = time(NULL); 403 if (alarmcount % 10 == 0) 404 getboottime(0); 405 alarmcount++; 406 wend = &mywd.wd_we[1024 / sizeof(struct whoent)]; 407 setutxent(); 408 while ((ut = getutxent()) != NULL && we < wend) { 409 if (ut->ut_type != USER_PROCESS) 410 continue; 411 strncpy(we->we_utmp.out_line, ut->ut_line, 412 sizeof(we->we_utmp.out_line)); 413 strncpy(we->we_utmp.out_name, ut->ut_user, 414 sizeof(we->we_utmp.out_name)); 415 we->we_utmp.out_time = 416 htonl(_time_to_time32(ut->ut_tv.tv_sec)); 417 we++; 418 } 419 endutxent(); 420 421 if (chdir(_PATH_DEV)) { 422 syslog(LOG_ERR, "chdir(%s): %m", _PATH_DEV); 423 exit(1); 424 } 425 wend = we; 426 for (we = mywd.wd_we; we < wend; we++) { 427 if (stat(we->we_utmp.out_line, &stb) >= 0) 428 we->we_idle = htonl(now - stb.st_atime); 429 we++; 430 } 431 (void)getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); 432 for (i = 0; i < 3; i++) 433 mywd.wd_loadav[i] = htonl((u_long)(avenrun[i] * 100)); 434 cc = (char *)wend - (char *)&mywd; 435 mywd.wd_sendtime = htonl(_time_to_time32(time(NULL))); 436 mywd.wd_vers = WHODVERSION; 437 mywd.wd_type = WHODTYPE_STATUS; 438 if (multicast_mode == SCOPED_MULTICAST) { 439 (void) sendto(s, (char *)&mywd, cc, 0, 440 (struct sockaddr *)&multicast_addr, 441 sizeof(multicast_addr)); 442 } 443 else for (np = neighbors; np != NULL; np = np->n_next) { 444 if (multicast_mode == PER_INTERFACE_MULTICAST && 445 np->n_flags & IFF_MULTICAST) { 446 /* 447 * Select the outgoing interface for the multicast. 448 */ 449 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 450 &(((struct sockaddr_in *)np->n_addr)->sin_addr), 451 sizeof(struct in_addr)) < 0) { 452 syslog(LOG_ERR, 453 "setsockopt IP_MULTICAST_IF: %m"); 454 exit(1); 455 } 456 (void) sendto(s, (char *)&mywd, cc, 0, 457 (struct sockaddr *)&multicast_addr, 458 sizeof(multicast_addr)); 459 } else (void) sendto(s, (char *)&mywd, cc, 0, 460 np->n_addr, np->n_addrlen); 461 } 462 if (chdir(_PATH_RWHODIR)) { 463 syslog(LOG_ERR, "chdir(%s): %m", _PATH_RWHODIR); 464 exit(1); 465 } 466 (void) alarm(AL_INTERVAL); 467} 468 469void 470getboottime(signo) 471 int signo __unused; 472{ 473 int mib[2]; 474 size_t size; 475 struct timeval tm; 476 477 mib[0] = CTL_KERN; 478 mib[1] = KERN_BOOTTIME; 479 size = sizeof(tm); 480 if (sysctl(mib, 2, &tm, &size, NULL, 0) == -1) { 481 syslog(LOG_ERR, "cannot get boottime: %m"); 482 exit(1); 483 } 484 mywd.wd_boottime = htonl(_time_to_time32(tm.tv_sec)); 485} 486 487void 488quit(msg) 489 const char *msg; 490{ 491 syslog(LOG_ERR, "%s", msg); 492 exit(1); 493} 494 495void 496rt_xaddrs(cp, cplim, rtinfo) 497 register caddr_t cp, cplim; 498 register struct rt_addrinfo *rtinfo; 499{ 500 register struct sockaddr *sa; 501 register int i; 502 503 memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info)); 504 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 505 if ((rtinfo->rti_addrs & (1 << i)) == 0) 506 continue; 507 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 508 cp += SA_SIZE(sa); 509 } 510} 511 512/* 513 * Figure out device configuration and select 514 * networks which deserve status information. 515 */ 516int 517configure(so) 518 int so; 519{ 520 register struct neighbor *np; 521 register struct if_msghdr *ifm; 522 register struct ifa_msghdr *ifam; 523 struct sockaddr_dl *sdl; 524 size_t needed; 525 int mib[6], flags = 0, len; 526 char *buf, *lim, *next; 527 struct rt_addrinfo info; 528 529 if (multicast_mode != NO_MULTICAST) { 530 multicast_addr.sin_addr.s_addr = htonl(INADDR_WHOD_GROUP); 531 multicast_addr.sin_port = sp->s_port; 532 } 533 534 if (multicast_mode == SCOPED_MULTICAST) { 535 struct ip_mreq mreq; 536 unsigned char ttl; 537 538 mreq.imr_multiaddr.s_addr = htonl(INADDR_WHOD_GROUP); 539 mreq.imr_interface.s_addr = htonl(INADDR_ANY); 540 if (setsockopt(so, IPPROTO_IP, IP_ADD_MEMBERSHIP, 541 &mreq, sizeof(mreq)) < 0) { 542 syslog(LOG_ERR, 543 "setsockopt IP_ADD_MEMBERSHIP: %m"); 544 return(0); 545 } 546 ttl = multicast_scope; 547 if (setsockopt(so, IPPROTO_IP, IP_MULTICAST_TTL, 548 &ttl, sizeof(ttl)) < 0) { 549 syslog(LOG_ERR, 550 "setsockopt IP_MULTICAST_TTL: %m"); 551 return(0); 552 } 553 return(1); 554 } 555 556 mib[0] = CTL_NET; 557 mib[1] = PF_ROUTE; 558 mib[2] = 0; 559 mib[3] = AF_INET; 560 mib[4] = NET_RT_IFLIST; 561 mib[5] = 0; 562 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 563 quit("route-sysctl-estimate"); 564 if ((buf = malloc(needed)) == NULL) 565 quit("malloc"); 566 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 567 quit("actual retrieval of interface table"); 568 lim = buf + needed; 569 570 sdl = NULL; /* XXX just to keep gcc -Wall happy */ 571 for (next = buf; next < lim; next += ifm->ifm_msglen) { 572 ifm = (struct if_msghdr *)next; 573 if (ifm->ifm_type == RTM_IFINFO) { 574 sdl = (struct sockaddr_dl *)(ifm + 1); 575 flags = ifm->ifm_flags; 576 continue; 577 } 578 if ((flags & IFF_UP) == 0 || 579 (flags & (((multicast_mode == PER_INTERFACE_MULTICAST) ? 580 IFF_MULTICAST : 0) | 581 IFF_BROADCAST|iff_flag)) == 0) 582 continue; 583 if (ifm->ifm_type != RTM_NEWADDR) 584 quit("out of sync parsing NET_RT_IFLIST"); 585 ifam = (struct ifa_msghdr *)ifm; 586 info.rti_addrs = ifam->ifam_addrs; 587 rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam, 588 &info); 589 /* gag, wish we could get rid of Internet dependencies */ 590#define dstaddr info.rti_info[RTAX_BRD] 591#define ifaddr info.rti_info[RTAX_IFA] 592#define IPADDR_SA(x) ((struct sockaddr_in *)(x))->sin_addr.s_addr 593#define PORT_SA(x) ((struct sockaddr_in *)(x))->sin_port 594 if (dstaddr == 0 || dstaddr->sa_family != AF_INET) 595 continue; 596 PORT_SA(dstaddr) = sp->s_port; 597 for (np = neighbors; np != NULL; np = np->n_next) 598 if (memcmp(sdl->sdl_data, np->n_name, 599 sdl->sdl_nlen) == 0 && 600 IPADDR_SA(np->n_addr) == IPADDR_SA(dstaddr)) 601 break; 602 if (np != NULL) 603 continue; 604 len = sizeof(*np) + dstaddr->sa_len + sdl->sdl_nlen + 1; 605 np = (struct neighbor *)malloc(len); 606 if (np == NULL) 607 quit("malloc of neighbor structure"); 608 memset(np, 0, len); 609 np->n_flags = flags; 610 np->n_addr = (struct sockaddr *)(np + 1); 611 np->n_addrlen = dstaddr->sa_len; 612 np->n_name = np->n_addrlen + (char *)np->n_addr; 613 memcpy((char *)np->n_addr, (char *)dstaddr, np->n_addrlen); 614 memcpy(np->n_name, sdl->sdl_data, sdl->sdl_nlen); 615 if (multicast_mode == PER_INTERFACE_MULTICAST && 616 (flags & IFF_MULTICAST) && 617 !(flags & IFF_LOOPBACK)) { 618 struct ip_mreq mreq; 619 620 memcpy((char *)np->n_addr, (char *)ifaddr, 621 np->n_addrlen); 622 mreq.imr_multiaddr.s_addr = htonl(INADDR_WHOD_GROUP); 623 mreq.imr_interface.s_addr = 624 ((struct sockaddr_in *)np->n_addr)->sin_addr.s_addr; 625 if (setsockopt(s, IPPROTO_IP, IP_ADD_MEMBERSHIP, 626 &mreq, sizeof(mreq)) < 0) { 627 syslog(LOG_ERR, 628 "setsockopt IP_ADD_MEMBERSHIP: %m"); 629#if 0 630 /* Fall back to broadcast on this if. */ 631 np->n_flags &= ~IFF_MULTICAST; 632#else 633 free((char *)np); 634 continue; 635#endif 636 } 637 } 638 np->n_next = neighbors; 639 neighbors = np; 640 } 641 free(buf); 642 return (1); 643} 644 645#ifdef DEBUG 646void 647Sendto(s, buf, cc, flags, to, tolen) 648 int s; 649 const void *buf; 650 size_t cc; 651 int flags; 652 const struct sockaddr *to; 653 int tolen; 654{ 655 register struct whod *w = (struct whod *)buf; 656 register struct whoent *we; 657 struct sockaddr_in *sin = (struct sockaddr_in *)to; 658 659 printf("sendto %x.%d\n", ntohl(sin->sin_addr.s_addr), 660 ntohs(sin->sin_port)); 661 printf("hostname %s %s\n", w->wd_hostname, 662 interval(ntohl(w->wd_sendtime) - ntohl(w->wd_boottime), " up")); 663 printf("load %4.2f, %4.2f, %4.2f\n", 664 ntohl(w->wd_loadav[0]) / 100.0, ntohl(w->wd_loadav[1]) / 100.0, 665 ntohl(w->wd_loadav[2]) / 100.0); 666 cc -= WHDRSIZE; 667 for (we = w->wd_we, cc /= sizeof(struct whoent); cc > 0; cc--, we++) { 668 time_t t = _time32_to_time(ntohl(we->we_utmp.out_time)); 669 printf("%-8.8s %s:%s %.12s", 670 we->we_utmp.out_name, 671 w->wd_hostname, we->we_utmp.out_line, 672 ctime(&t)+4); 673 we->we_idle = ntohl(we->we_idle) / 60; 674 if (we->we_idle) { 675 if (we->we_idle >= 100*60) 676 we->we_idle = 100*60 - 1; 677 if (we->we_idle >= 60) 678 printf(" %2d", we->we_idle / 60); 679 else 680 printf(" "); 681 printf(":%02d", we->we_idle % 60); 682 } 683 printf("\n"); 684 } 685} 686 687char * 688interval(time, updown) 689 int time; 690 char *updown; 691{ 692 static char resbuf[32]; 693 int days, hours, minutes; 694 695 if (time < 0 || time > 3*30*24*60*60) { 696 (void) sprintf(resbuf, " %s ??:??", updown); 697 return (resbuf); 698 } 699 minutes = (time + 59) / 60; /* round to minutes */ 700 hours = minutes / 60; minutes %= 60; 701 days = hours / 24; hours %= 24; 702 if (days) 703 (void) sprintf(resbuf, "%s %2d+%02d:%02d", 704 updown, days, hours, minutes); 705 else 706 (void) sprintf(resbuf, "%s %2d:%02d", 707 updown, hours, minutes); 708 return (resbuf); 709} 710#endif 711