main.c revision 1.1.1.3
1 /* 2 * Copyright (c) 1983, 1988, 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 * 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. 20 * 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 31 * SUCH DAMAGE. 32 */ 33 34 char copyright[] = 35 "@(#) Copyright (c) 1983, 1988, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #if !defined(lint) && !defined(sgi) 38 static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/5/93"; 39 #endif /* not lint */ 40 41 #ident "$Revision: 1.1.1.3 $" 42 43 #include "defs.h" 44 #include "pathnames.h" 45 #ifdef sgi 46 #include "math.h" 47 #endif 48 #include <signal.h> 49 #include <fcntl.h> 50 #include <sys/file.h> 51 52 pid_t mypid; 53 54 naddr myaddr; /* system address */ 55 char myname[MAXHOSTNAMELEN+1]; 56 57 int supplier; /* supply or broadcast updates */ 58 int supplier_set; 59 int ipforwarding = 1; /* kernel forwarding on */ 60 61 int default_gateway; /* 1=advertise default */ 62 int background = 1; 63 int ridhosts; /* 1=reduce host routes */ 64 int mhome; /* 1=want multi-homed host route */ 65 int advertise_mhome; /* 1=must continue adverising it */ 66 int auth_ok = 1; /* 1=ignore auth if we do not care */ 67 68 struct timeval epoch; /* when started */ 69 struct timeval clk, prev_clk; 70 struct timeval now; /* current idea of time */ 71 time_t now_stale; 72 time_t now_garbage; 73 74 struct timeval next_bcast; /* next general broadcast */ 75 struct timeval no_flash = {EPOCH+SUPPLY_INTERVAL}; /* inhibit flash update */ 76 77 fd_set fdbits; 78 int sock_max; 79 int rip_sock = -1; /* RIP socket */ 80 struct interface *rip_sock_mcast; /* current multicast interface */ 81 int rt_sock; /* routing socket */ 82 int rt_sock_seqno; 83 84 85 static int get_rip_sock(naddr, int); 86 static void timevalsub(struct timeval *, struct timeval *, struct timeval *); 87 88 int 89 main(int argc, 90 char *argv[]) 91 { 92 int n, mib[4], off; 93 size_t len; 94 char *p, *q; 95 struct timeval wtime, t2; 96 time_t dt; 97 fd_set ibits; 98 naddr p_addr, p_mask; 99 struct interface *ifp; 100 struct parm parm; 101 char *tracename = 0; 102 103 104 openlog("routed", LOG_PID | LOG_ODELAY, LOG_DAEMON); 105 ftrace = stdout; 106 107 gettimeofday(&clk, 0); 108 prev_clk = clk; 109 epoch = clk; 110 epoch.tv_sec -= EPOCH; 111 now.tv_sec = EPOCH; 112 now_stale = EPOCH - STALE_TIME; 113 now_garbage = EPOCH - GARBAGE_TIME; 114 wtime.tv_sec = 0; 115 116 (void)gethostname(myname, sizeof(myname)-1); 117 (void)gethost(myname, &myaddr); 118 119 while ((n = getopt(argc, argv, "sqdghmpAtT:F:P:")) != EOF) { 120 switch (n) { 121 case 's': 122 supplier = 1; 123 supplier_set = 1; 124 break; 125 126 case 'q': 127 supplier = 0; 128 supplier_set = 1; 129 break; 130 131 case 'd': 132 background = 0; 133 break; 134 135 case 'g': 136 bzero(&parm, sizeof(parm)); 137 parm.parm_d_metric = 1; 138 p = check_parms(&parm); 139 if (p != 0) 140 msglog("bad -g: %s", p); 141 else 142 default_gateway = 1; 143 break; 144 145 case 'h': /* suppress extra host routes */ 146 ridhosts = 1; 147 break; 148 149 case 'm': /* advertise host route */ 150 mhome = 1; /* on multi-homed hosts */ 151 break; 152 153 case 'A': 154 /* Ignore authentication if we do not care. 155 * Crazy as it is, that is what RFC 1723 requires. 156 */ 157 auth_ok = 0; 158 break; 159 160 case 't': 161 new_tracelevel++; 162 break; 163 164 case 'T': 165 tracename = optarg; 166 break; 167 168 case 'F': /* minimal routes for SLIP */ 169 n = HOPCNT_INFINITY-2; 170 p = strchr(optarg,','); 171 if (p && *p != '\0') { 172 n = (int)strtoul(p+1, &q, 0); 173 if (*q == '\0' 174 && n <= HOPCNT_INFINITY-1 175 && n >= 1) 176 *p = '\0'; 177 } 178 if (!getnet(optarg, &p_addr, &p_mask)) { 179 msglog("bad network; \"-F %s\"", 180 optarg); 181 break; 182 } 183 bzero(&parm, sizeof(parm)); 184 parm.parm_addr_h = ntohl(p_addr); 185 parm.parm_mask = p_mask; 186 parm.parm_d_metric = n; 187 p = check_parms(&parm); 188 if (p != 0) 189 msglog("bad -F: %s", p); 190 break; 191 192 case 'P': 193 /* handle arbirary, (usually) per-interface 194 * parameters. 195 */ 196 p = parse_parms(optarg); 197 if (p != 0) 198 msglog("bad \"%s\" in \"%s\"", 199 p, optarg); 200 break; 201 202 default: 203 goto usage; 204 } 205 } 206 argc -= optind; 207 argv += optind; 208 209 if (tracename == 0 && argc >= 1) { 210 tracename = *argv++; 211 argc--; 212 } 213 if (argc != 0) { 214 usage: 215 logbad(0, "usage: routed [-sqdghmpAt] [-T /tracefile]" 216 " [-F net[,metric]] [-P parms]"); 217 } 218 if (geteuid() != 0) 219 logbad(0, "requires UID 0"); 220 221 mib[0] = CTL_NET; 222 mib[1] = PF_INET; 223 mib[2] = IPPROTO_IP; 224 mib[3] = IPCTL_FORWARDING; 225 len = sizeof(ipforwarding); 226 if (sysctl(mib, 4, &ipforwarding, &len, 0, 0) < 0) 227 LOGERR("sysctl(IPCTL_FORWARDING)"); 228 229 if (!ipforwarding) { 230 if (supplier) 231 msglog("-s incompatible with ipforwarding=0"); 232 if (default_gateway) { 233 msglog("-g incompatible with ipforwarding=0"); 234 default_gateway = 0; 235 } 236 supplier = 0; 237 supplier_set = 1; 238 } 239 if (default_gateway) { 240 if (supplier_set && !supplier) { 241 msglog("-g and -q incompatible"); 242 } else { 243 supplier = 1; 244 supplier_set = 1; 245 } 246 } 247 248 249 /* get into the background */ 250 if (background) { 251 #ifdef sgi 252 if (0 > _daemonize(_DF_NOCHDIR, 253 new_tracelevel == 0 ? -1 : STDOUT_FILENO, 254 new_tracelevel == 0 ? -1 : STDERR_FILENO, 255 -1)) 256 BADERR(0, "_daemonize()"); 257 #else 258 if (daemon(1, 1) < 0) 259 BADERR(0,"daemon()"); 260 #endif 261 } 262 263 mypid = getpid(); 264 srandom((int)(clk.tv_sec ^ clk.tv_usec ^ mypid)); 265 266 /* prepare socket connected to the kernel. 267 */ 268 rt_sock = socket(AF_ROUTE, SOCK_RAW, 0); 269 if (rt_sock < 0) 270 BADERR(1,"rt_sock = socket()"); 271 if (fcntl(rt_sock, F_SETFL, O_NONBLOCK) == -1) 272 logbad(1, "fcntl(rt_sock) O_NONBLOCK: %s", strerror(errno)); 273 off = 0; 274 if (setsockopt(rt_sock, SOL_SOCKET,SO_USELOOPBACK, 275 &off,sizeof(off)) < 0) 276 LOGERR("setsockopt(SO_USELOOPBACK,0)"); 277 278 /* prepare Router Discovery socket. 279 */ 280 rdisc_sock = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 281 if (rdisc_sock < 0) 282 BADERR(1,"rdisc_sock = socket()"); 283 fix_sock(rdisc_sock,"rdisc_sock"); 284 285 fix_select(); 286 287 288 if (background && new_tracelevel == 0) 289 ftrace = 0; 290 if (tracename != 0) { 291 trace_on(tracename, 1); 292 if (new_tracelevel == 0) /* use stdout if file is bad */ 293 new_tracelevel = 1; 294 } 295 set_tracelevel(); 296 297 /* initialize radix tree */ 298 rtinit(); 299 300 /* Pick a random part of the second for our output to minimize 301 * collisions. 302 * 303 * Start broadcasting after hearing from other routers, and 304 * at a random time so a bunch of systems do not get synchronized 305 * after a power failure. 306 */ 307 intvl_random(&next_bcast, EPOCH+MIN_WAITTIME, EPOCH+SUPPLY_INTERVAL); 308 age_timer.tv_usec = next_bcast.tv_usec; 309 age_timer.tv_sec = EPOCH+MIN_WAITTIME; 310 rdisc_timer = next_bcast; 311 ifinit_timer.tv_usec = next_bcast.tv_usec; 312 313 signal(SIGALRM, sigalrm); 314 signal(SIGHUP, sigterm); 315 signal(SIGTERM, sigterm); 316 signal(SIGINT, sigterm); 317 signal(SIGUSR1, sigtrace_on); 318 signal(SIGUSR2, sigtrace_off); 319 320 /* Collect an initial view of the world by checking the interface 321 * configuration and the kludge file. 322 */ 323 gwkludge(); 324 ifinit(); 325 flush_kern(); 326 327 /* Ask for routes */ 328 rip_query(); 329 if (!supplier) 330 rdisc_sol(); 331 332 /* Loop forever, listening and broadcasting. 333 */ 334 for (;;) { 335 prev_clk = clk; 336 gettimeofday(&clk, 0); 337 timevalsub(&t2, &clk, &prev_clk); 338 if (t2.tv_sec < 0 339 || t2.tv_sec > wtime.tv_sec + 5) { 340 /* Deal with time changes before other housekeeping to 341 * keep everything straight. 342 */ 343 dt = t2.tv_sec; 344 if (dt > 0) 345 dt -= wtime.tv_sec; 346 trace_act("time changed by %d sec\n", dt); 347 epoch.tv_sec += dt; 348 } 349 timevalsub(&now, &clk, &epoch); 350 now_stale = now.tv_sec - STALE_TIME; 351 now_garbage = now.tv_sec - GARBAGE_TIME; 352 353 /* deal with interrupts that should affect tracing */ 354 set_tracelevel(); 355 356 if (stopint != 0) { 357 if (supplier) { 358 rip_bcast(0); 359 rdisc_adv(); 360 } 361 trace_off("exiting with signal %d\n", stopint); 362 exit(stopint | 128); 363 } 364 365 /* look for new or dead interfaces */ 366 timevalsub(&wtime, &ifinit_timer, &now); 367 if (wtime.tv_sec <= 0) { 368 wtime.tv_sec = 0; 369 ifinit(); 370 rip_query(); 371 continue; 372 } 373 374 /* If it is time, then broadcast our routes. 375 */ 376 if (supplier || advertise_mhome) { 377 timevalsub(&t2, &next_bcast, &now); 378 if (t2.tv_sec <= 0) { 379 /* Synchronize the aging and broadcast 380 * timers to minimize awakenings 381 */ 382 age(0); 383 384 rip_bcast(0); 385 386 /* It is desirable to send routing updates 387 * regularly. So schedule the next update 388 * 30 seconds after the previous one was 389 * secheduled, instead of 30 seconds after 390 * the previous update was finished. 391 * Even if we just started after discovering 392 * a 2nd interface or were otherwise delayed, 393 * pick a 30-second aniversary of the 394 * original broadcast time. 395 */ 396 n = 1 + (0-t2.tv_sec)/SUPPLY_INTERVAL; 397 next_bcast.tv_sec += n*SUPPLY_INTERVAL; 398 399 continue; 400 } 401 402 if (timercmp(&t2, &wtime, <)) 403 wtime = t2; 404 } 405 406 /* If we need a flash update, either do it now or 407 * set the delay to end when it is time. 408 * 409 * If we are within MIN_WAITTIME seconds of a full update, 410 * do not bother. 411 */ 412 if (need_flash 413 && supplier 414 && no_flash.tv_sec+MIN_WAITTIME < next_bcast.tv_sec) { 415 /* accurate to the millisecond */ 416 if (!timercmp(&no_flash, &now, >)) 417 rip_bcast(1); 418 timevalsub(&t2, &no_flash, &now); 419 if (timercmp(&t2, &wtime, <)) 420 wtime = t2; 421 } 422 423 /* trigger the main aging timer. 424 */ 425 timevalsub(&t2, &age_timer, &now); 426 if (t2.tv_sec <= 0) { 427 age(0); 428 continue; 429 } 430 if (timercmp(&t2, &wtime, <)) 431 wtime = t2; 432 433 /* update the kernel routing table 434 */ 435 timevalsub(&t2, &need_kern, &now); 436 if (t2.tv_sec <= 0) { 437 age(0); 438 continue; 439 } 440 if (timercmp(&t2, &wtime, <)) 441 wtime = t2; 442 443 /* take care of router discovery, 444 * but do it to the millisecond 445 */ 446 if (!timercmp(&rdisc_timer, &now, >)) { 447 rdisc_age(0); 448 continue; 449 } 450 timevalsub(&t2, &rdisc_timer, &now); 451 if (timercmp(&t2, &wtime, <)) 452 wtime = t2; 453 454 455 /* wait for input or a timer to expire. 456 */ 457 trace_flush(); 458 ibits = fdbits; 459 n = select(sock_max, &ibits, 0, 0, &wtime); 460 if (n <= 0) { 461 if (n < 0 && errno != EINTR && errno != EAGAIN) 462 BADERR(1,"select"); 463 continue; 464 } 465 466 if (FD_ISSET(rt_sock, &ibits)) { 467 read_rt(); 468 n--; 469 } 470 if (rdisc_sock >= 0 && FD_ISSET(rdisc_sock, &ibits)) { 471 read_d(); 472 n--; 473 } 474 if (rip_sock >= 0 && FD_ISSET(rip_sock, &ibits)) { 475 read_rip(rip_sock, 0); 476 n--; 477 } 478 479 for (ifp = ifnet; n > 0 && 0 != ifp; ifp = ifp->int_next) { 480 if (ifp->int_rip_sock >= 0 481 && FD_ISSET(ifp->int_rip_sock, &ibits)) { 482 read_rip(ifp->int_rip_sock, ifp); 483 n--; 484 } 485 } 486 } 487 } 488 489 490 /* ARGSUSED */ 491 void 492 sigalrm(int sig) 493 { 494 /* Historically, SIGALRM would cause the daemon to check for 495 * new and broken interfaces. 496 */ 497 ifinit_timer.tv_sec = now.tv_sec; 498 trace_act("SIGALRM\n"); 499 } 500 501 502 /* watch for fatal signals */ 503 void 504 sigterm(int sig) 505 { 506 stopint = sig; 507 (void)signal(sig, SIG_DFL); /* catch it only once */ 508 } 509 510 511 void 512 fix_select(void) 513 { 514 struct interface *ifp; 515 516 517 FD_ZERO(&fdbits); 518 sock_max = 0; 519 520 FD_SET(rt_sock, &fdbits); 521 if (sock_max <= rt_sock) 522 sock_max = rt_sock+1; 523 if (rip_sock >= 0) { 524 FD_SET(rip_sock, &fdbits); 525 if (sock_max <= rip_sock) 526 sock_max = rip_sock+1; 527 } 528 for (ifp = ifnet; 0 != ifp; ifp = ifp->int_next) { 529 if (ifp->int_rip_sock >= 0) { 530 FD_SET(ifp->int_rip_sock, &fdbits); 531 if (sock_max <= ifp->int_rip_sock) 532 sock_max = ifp->int_rip_sock+1; 533 } 534 } 535 if (rdisc_sock >= 0) { 536 FD_SET(rdisc_sock, &fdbits); 537 if (sock_max <= rdisc_sock) 538 sock_max = rdisc_sock+1; 539 } 540 } 541 542 543 void 544 fix_sock(int sock, 545 char *name) 546 { 547 int on; 548 #define MIN_SOCKBUF (4*1024) 549 static int rbuf; 550 551 if (fcntl(sock, F_SETFL, O_NONBLOCK) == -1) 552 logbad(1, "fcntl(%s) O_NONBLOCK: %s", 553 name, strerror(errno)); 554 on = 1; 555 if (setsockopt(sock, SOL_SOCKET,SO_BROADCAST, 556 &on,sizeof(on)) < 0) 557 msglog("setsockopt(%s,SO_BROADCAST): %s", 558 name, strerror(errno)); 559 if (rbuf >= MIN_SOCKBUF) { 560 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, 561 &rbuf, sizeof(rbuf)) < 0) 562 msglog("setsockopt(%s,SO_RCVBUF=%d): %s", 563 name, rbuf, strerror(errno)); 564 } else { 565 for (rbuf = 60*1024; ; rbuf -= 4096) { 566 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, 567 &rbuf, sizeof(rbuf)) == 0) { 568 trace_act("RCVBUF=%d\n", rbuf); 569 break; 570 } 571 if (rbuf < MIN_SOCKBUF) { 572 msglog("setsockopt(%s,SO_RCVBUF = %d): %s", 573 name, rbuf, strerror(errno)); 574 break; 575 } 576 } 577 } 578 } 579 580 581 /* get a rip socket 582 */ 583 static int /* <0 or file descriptor */ 584 get_rip_sock(naddr addr, 585 int serious) /* 1=failure to bind is serious */ 586 { 587 struct sockaddr_in sin; 588 unsigned char ttl; 589 int s; 590 591 592 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) 593 BADERR(1,"rip_sock = socket()"); 594 595 bzero(&sin,sizeof(sin)); 596 #ifdef _HAVE_SIN_LEN 597 sin.sin_len = sizeof(sin); 598 #endif 599 sin.sin_family = AF_INET; 600 sin.sin_port = htons(RIP_PORT); 601 sin.sin_addr.s_addr = addr; 602 if (bind(s, (struct sockaddr *)&sin,sizeof(sin)) < 0) { 603 if (serious) 604 BADERR(errno != EADDRINUSE, "bind(rip_sock)"); 605 return -1; 606 } 607 fix_sock(s,"rip_sock"); 608 609 ttl = 1; 610 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 611 &ttl, sizeof(ttl)) < 0) 612 DBGERR(1,"rip_sock setsockopt(IP_MULTICAST_TTL)"); 613 614 return s; 615 } 616 617 618 /* turn off main RIP socket */ 619 void 620 rip_off(void) 621 { 622 struct interface *ifp; 623 register naddr addr; 624 625 626 if (rip_sock >= 0 && !mhome) { 627 trace_act("turn off RIP\n"); 628 629 (void)close(rip_sock); 630 rip_sock = -1; 631 632 /* get non-broadcast sockets to listen to queries. 633 */ 634 for (ifp = ifnet; ifp != 0; ifp = ifp->int_next) { 635 if (ifp->int_rip_sock < 0 636 && !(ifp->int_state & IS_ALIAS)) { 637 addr = ((ifp->int_if_flags & IFF_POINTOPOINT) 638 ? ifp->int_dstaddr 639 : ifp->int_addr); 640 ifp->int_rip_sock = get_rip_sock(addr, 0); 641 } 642 } 643 644 fix_select(); 645 646 age(0); 647 } 648 } 649 650 651 /* turn on RIP multicast input via an interface 652 */ 653 static void 654 rip_mcast_on(struct interface *ifp) 655 { 656 struct ip_mreq m; 657 658 if (!IS_RIP_IN_OFF(ifp->int_state) 659 && (ifp->int_if_flags & IFF_MULTICAST) 660 #ifdef MCAST_PPP_BUG 661 && !(ifp->int_if_flags & IFF_POINTOPOINT) 662 #endif 663 && !(ifp->int_state & IS_ALIAS)) { 664 m.imr_multiaddr.s_addr = htonl(INADDR_RIP_GROUP); 665 m.imr_interface.s_addr = ((ifp->int_if_flags & IFF_POINTOPOINT) 666 ? ifp->int_dstaddr 667 : ifp->int_addr); 668 if (setsockopt(rip_sock,IPPROTO_IP, IP_ADD_MEMBERSHIP, 669 &m, sizeof(m)) < 0) 670 LOGERR("setsockopt(IP_ADD_MEMBERSHIP RIP)"); 671 } 672 } 673 674 675 /* Prepare socket used for RIP. 676 */ 677 void 678 rip_on(struct interface *ifp) 679 { 680 /* If the main RIP socket is already alive, only start receiving 681 * multicasts for this interface. 682 */ 683 if (rip_sock >= 0) { 684 if (ifp != 0) 685 rip_mcast_on(ifp); 686 return; 687 } 688 689 /* If the main RIP socket is off, and it makes sense to turn it on, 690 * turn it on for all of the interfaces. 691 */ 692 if (rip_interfaces > 0 && !rdisc_ok) { 693 trace_act("turn on RIP\n"); 694 695 /* Close all of the query sockets so that we can open 696 * the main socket. SO_REUSEPORT is not a solution, 697 * since that would let two daemons bind to the broadcast 698 * socket. 699 */ 700 for (ifp = ifnet; ifp != 0; ifp = ifp->int_next) { 701 if (ifp->int_rip_sock >= 0) { 702 (void)close(ifp->int_rip_sock); 703 ifp->int_rip_sock = -1; 704 } 705 } 706 707 rip_sock = get_rip_sock(INADDR_ANY, 1); 708 rip_sock_mcast = 0; 709 710 /* Do not advertise anything until we have heard something 711 */ 712 if (next_bcast.tv_sec < now.tv_sec+MIN_WAITTIME) 713 next_bcast.tv_sec = now.tv_sec+MIN_WAITTIME; 714 715 for (ifp = ifnet; ifp != 0; ifp = ifp->int_next) { 716 if (!IS_RIP_IN_OFF(ifp->int_state)) 717 ifp->int_state &= ~IS_RIP_QUERIED; 718 rip_mcast_on(ifp); 719 } 720 721 ifinit_timer.tv_sec = now.tv_sec; 722 723 fix_select(); 724 725 } else if (ifp != 0 726 && ifp->int_rip_sock < 0 727 && !(ifp->int_state & IS_ALIAS)) { 728 /* RIP is off, so ensure there are sockets on which 729 * to listen for queries. 730 */ 731 ifp->int_rip_sock = get_rip_sock(ifp->int_addr, 0); 732 733 fix_select(); 734 } 735 } 736 737 738 /* get a random instant in an interval 739 */ 740 void 741 intvl_random(struct timeval *tp, /* put value here */ 742 u_long lo, /* value is after this second */ 743 u_long hi) /* and before this */ 744 { 745 tp->tv_sec = (time_t)(hi == lo 746 ? lo 747 : (lo + random() % ((hi - lo)))); 748 tp->tv_usec = random() % 1000000; 749 } 750 751 752 void 753 timevaladd(struct timeval *t1, 754 struct timeval *t2) 755 { 756 757 t1->tv_sec += t2->tv_sec; 758 if ((t1->tv_usec += t2->tv_usec) > 1000000) { 759 t1->tv_sec++; 760 t1->tv_usec -= 1000000; 761 } 762 } 763 764 765 /* t1 = t2 - t3 766 */ 767 static void 768 timevalsub(struct timeval *t1, 769 struct timeval *t2, 770 struct timeval *t3) 771 { 772 t1->tv_sec = t2->tv_sec - t3->tv_sec; 773 if ((t1->tv_usec = t2->tv_usec - t3->tv_usec) < 0) { 774 t1->tv_sec--; 775 t1->tv_usec += 1000000; 776 } 777 } 778 779 780 void 781 msglog(char *p, ...) 782 { 783 va_list args; 784 785 trace_flush(); 786 787 va_start(args, p); 788 vsyslog(LOG_ERR, p, args); 789 790 if (ftrace != 0) { 791 if (ftrace == stdout) 792 (void)fputs("routed: ", ftrace); 793 (void)vfprintf(ftrace, p, args); 794 (void)fputc('\n', ftrace); 795 } 796 } 797 798 799 void 800 logbad(int dump, char *p, ...) 801 { 802 va_list args; 803 804 trace_flush(); 805 806 va_start(args, p); 807 vsyslog(LOG_ERR, p, args); 808 809 (void)fputs("routed: ", stderr); 810 (void)vfprintf(stderr, p, args); 811 (void)fputs("; giving up\n",stderr); 812 (void)fflush(stderr); 813 814 if (dump) 815 abort(); 816 exit(1); 817 } 818
Indexes created Thu Oct 23 18:09:57 GMT 2025