1 /*- 2 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> 3 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/usr.sbin/ppp/bundle.c,v 1.84.2.12 2002/09/01 02:12:22 brian Exp $ 27 * $DragonFly: src/usr.sbin/ppp/bundle.c,v 1.5 2005/11/24 23:42:54 swildner Exp $ 28 */ 29 30 #include <sys/param.h> 31 #include <sys/socket.h> 32 #include <netinet/in.h> 33 #include <net/if.h> 34 #include <net/tun/if_tun.h> /* For TUNS* ioctls */ 35 #include <net/route.h> 36 #include <netinet/in_systm.h> 37 #include <netinet/ip.h> 38 #include <sys/un.h> 39 40 #include <errno.h> 41 #include <fcntl.h> 42 #ifdef __OpenBSD__ 43 #include <util.h> 44 #else 45 #include <libutil.h> 46 #endif 47 #include <paths.h> 48 #include <stdarg.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <sys/uio.h> 53 #include <sys/wait.h> 54 #include <termios.h> 55 #include <unistd.h> 56 57 #include "layer.h" 58 #include "defs.h" 59 #include "command.h" 60 #include "mbuf.h" 61 #include "log.h" 62 #include "id.h" 63 #include "timer.h" 64 #include "fsm.h" 65 #include "iplist.h" 66 #include "lqr.h" 67 #include "hdlc.h" 68 #include "throughput.h" 69 #include "slcompress.h" 70 #include "ncpaddr.h" 71 #include "ip.h" 72 #include "ipcp.h" 73 #include "filter.h" 74 #include "descriptor.h" 75 #include "route.h" 76 #include "lcp.h" 77 #include "ccp.h" 78 #include "link.h" 79 #include "mp.h" 80 #ifndef NORADIUS 81 #include "radius.h" 82 #endif 83 #include "ipv6cp.h" 84 #include "ncp.h" 85 #include "bundle.h" 86 #include "async.h" 87 #include "physical.h" 88 #include "auth.h" 89 #include "proto.h" 90 #include "chap.h" 91 #include "tun.h" 92 #include "prompt.h" 93 #include "chat.h" 94 #include "cbcp.h" 95 #include "datalink.h" 96 #include "iface.h" 97 #include "server.h" 98 #include "probe.h" 99 #ifndef NODES 100 #include "mppe.h" 101 #endif 102 103 #define SCATTER_SEGMENTS 7 /* version, datalink, name, physical, 104 throughput, throughput, device */ 105 106 #define SEND_MAXFD 3 /* Max file descriptors passed through 107 the local domain socket */ 108 109 static int bundle_RemainingIdleTime(struct bundle *); 110 111 static const char * const PhaseNames[] = { 112 "Dead", "Establish", "Authenticate", "Network", "Terminate" 113 }; 114 115 const char * 116 bundle_PhaseName(struct bundle *bundle) 117 { 118 return bundle->phase <= PHASE_TERMINATE ? 119 PhaseNames[bundle->phase] : "unknown"; 120 } 121 122 void 123 bundle_NewPhase(struct bundle *bundle, u_int new) 124 { 125 if (new == bundle->phase) 126 return; 127 128 if (new <= PHASE_TERMINATE) 129 log_Printf(LogPHASE, "bundle: %s\n", PhaseNames[new]); 130 131 switch (new) { 132 case PHASE_DEAD: 133 bundle->phase = new; 134 #ifndef NODES 135 MPPE_MasterKeyValid = 0; 136 #endif 137 log_DisplayPrompts(); 138 break; 139 140 case PHASE_ESTABLISH: 141 bundle->phase = new; 142 break; 143 144 case PHASE_AUTHENTICATE: 145 bundle->phase = new; 146 log_DisplayPrompts(); 147 break; 148 149 case PHASE_NETWORK: 150 if (ncp_fsmStart(&bundle->ncp, bundle)) { 151 bundle->phase = new; 152 log_DisplayPrompts(); 153 } else { 154 log_Printf(LogPHASE, "bundle: All NCPs are disabled\n"); 155 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 156 } 157 break; 158 159 case PHASE_TERMINATE: 160 bundle->phase = new; 161 mp_Down(&bundle->ncp.mp); 162 log_DisplayPrompts(); 163 break; 164 } 165 } 166 167 static void 168 bundle_LayerStart(void *v, struct fsm *fp) 169 { 170 /* The given FSM is about to start up ! */ 171 } 172 173 174 void 175 bundle_Notify(struct bundle *bundle, char c) 176 { 177 if (bundle->notify.fd != -1) { 178 int ret; 179 180 ret = write(bundle->notify.fd, &c, 1); 181 if (c != EX_REDIAL && c != EX_RECONNECT) { 182 if (ret == 1) 183 log_Printf(LogCHAT, "Parent notified of %s\n", 184 c == EX_NORMAL ? "success" : "failure"); 185 else 186 log_Printf(LogERROR, "Failed to notify parent of success\n"); 187 close(bundle->notify.fd); 188 bundle->notify.fd = -1; 189 } else if (ret == 1) 190 log_Printf(LogCHAT, "Parent notified of %s\n", ex_desc(c)); 191 else 192 log_Printf(LogERROR, "Failed to notify parent of %s\n", ex_desc(c)); 193 } 194 } 195 196 static void 197 bundle_ClearQueues(void *v) 198 { 199 struct bundle *bundle = (struct bundle *)v; 200 struct datalink *dl; 201 202 log_Printf(LogPHASE, "Clearing choked output queue\n"); 203 timer_Stop(&bundle->choked.timer); 204 205 /* 206 * Emergency time: 207 * 208 * We've had a full queue for PACKET_DEL_SECS seconds without being 209 * able to get rid of any of the packets. We've probably given up 210 * on the redials at this point, and the queued data has almost 211 * definitely been timed out by the layer above. As this is preventing 212 * us from reading the TUN_NAME device (we don't want to buffer stuff 213 * indefinitely), we may as well nuke this data and start with a clean 214 * slate ! 215 * 216 * Unfortunately, this has the side effect of shafting any compression 217 * dictionaries in use (causing the relevant RESET_REQ/RESET_ACK). 218 */ 219 220 ncp_DeleteQueues(&bundle->ncp); 221 for (dl = bundle->links; dl; dl = dl->next) 222 physical_DeleteQueue(dl->physical); 223 } 224 225 static void 226 bundle_LinkAdded(struct bundle *bundle, struct datalink *dl) 227 { 228 bundle->phys_type.all |= dl->physical->type; 229 if (dl->state == DATALINK_OPEN) 230 bundle->phys_type.open |= dl->physical->type; 231 232 #ifndef NORADIUS 233 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 234 != bundle->phys_type.open && bundle->session.timer.state == TIMER_STOPPED) 235 if (bundle->radius.sessiontime) 236 bundle_StartSessionTimer(bundle, 0); 237 #endif 238 239 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 240 != bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED) 241 /* We may need to start our idle timer */ 242 bundle_StartIdleTimer(bundle, 0); 243 } 244 245 void 246 bundle_LinksRemoved(struct bundle *bundle) 247 { 248 struct datalink *dl; 249 250 bundle->phys_type.all = bundle->phys_type.open = 0; 251 for (dl = bundle->links; dl; dl = dl->next) 252 bundle_LinkAdded(bundle, dl); 253 254 bundle_CalculateBandwidth(bundle); 255 mp_CheckAutoloadTimer(&bundle->ncp.mp); 256 257 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 258 == bundle->phys_type.open) { 259 #ifndef NORADIUS 260 if (bundle->radius.sessiontime) 261 bundle_StopSessionTimer(bundle); 262 #endif 263 bundle_StopIdleTimer(bundle); 264 } 265 } 266 267 static void 268 bundle_LayerUp(void *v, struct fsm *fp) 269 { 270 /* 271 * The given fsm is now up 272 * If it's an LCP, adjust our phys_mode.open value and check the 273 * autoload timer. 274 * If it's the first NCP, calculate our bandwidth 275 * If it's the first NCP, set our ``upat'' time 276 * If it's the first NCP, start the idle timer. 277 * If it's an NCP, tell our -background parent to go away. 278 * If it's the first NCP, start the autoload timer 279 */ 280 struct bundle *bundle = (struct bundle *)v; 281 282 if (fp->proto == PROTO_LCP) { 283 struct physical *p = link2physical(fp->link); 284 285 bundle_LinkAdded(bundle, p->dl); 286 mp_CheckAutoloadTimer(&bundle->ncp.mp); 287 } else if (isncp(fp->proto)) { 288 if (ncp_LayersOpen(&fp->bundle->ncp) == 1) { 289 bundle_CalculateBandwidth(fp->bundle); 290 time(&bundle->upat); 291 #ifndef NORADIUS 292 if (bundle->radius.sessiontime) 293 bundle_StartSessionTimer(bundle, 0); 294 #endif 295 bundle_StartIdleTimer(bundle, 0); 296 mp_CheckAutoloadTimer(&fp->bundle->ncp.mp); 297 } 298 bundle_Notify(bundle, EX_NORMAL); 299 } else if (fp->proto == PROTO_CCP) 300 bundle_CalculateBandwidth(fp->bundle); /* Against ccp_MTUOverhead */ 301 } 302 303 static void 304 bundle_LayerDown(void *v, struct fsm *fp) 305 { 306 /* 307 * The given FSM has been told to come down. 308 * If it's our last NCP, stop the idle timer. 309 * If it's our last NCP, clear our ``upat'' value. 310 * If it's our last NCP, stop the autoload timer 311 * If it's an LCP, adjust our phys_type.open value and any timers. 312 * If it's an LCP and we're in multilink mode, adjust our tun 313 * If it's the last LCP, down all NCPs 314 * speed and make sure our minimum sequence number is adjusted. 315 */ 316 317 struct bundle *bundle = (struct bundle *)v; 318 319 if (isncp(fp->proto)) { 320 if (ncp_LayersOpen(&fp->bundle->ncp) == 0) { 321 #ifndef NORADIUS 322 if (bundle->radius.sessiontime) 323 bundle_StopSessionTimer(bundle); 324 #endif 325 bundle_StopIdleTimer(bundle); 326 bundle->upat = 0; 327 mp_StopAutoloadTimer(&bundle->ncp.mp); 328 } 329 } else if (fp->proto == PROTO_LCP) { 330 struct datalink *dl; 331 struct datalink *lost; 332 int others_active; 333 334 bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */ 335 336 lost = NULL; 337 others_active = 0; 338 for (dl = bundle->links; dl; dl = dl->next) { 339 if (fp == &dl->physical->link.lcp.fsm) 340 lost = dl; 341 else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 342 others_active++; 343 } 344 345 if (bundle->ncp.mp.active) { 346 bundle_CalculateBandwidth(bundle); 347 348 if (lost) 349 mp_LinkLost(&bundle->ncp.mp, lost); 350 else 351 log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n", 352 fp->link->name); 353 } 354 355 if (!others_active) { 356 /* Down the NCPs. We don't expect to get fsm_Close()d ourself ! */ 357 ncp2initial(&bundle->ncp); 358 mp_Down(&bundle->ncp.mp); 359 } 360 } 361 } 362 363 static void 364 bundle_LayerFinish(void *v, struct fsm *fp) 365 { 366 /* The given fsm is now down (fp cannot be NULL) 367 * 368 * If it's the last NCP, fsm_Close all LCPs 369 * If it's the last NCP, bring any MP layer down 370 */ 371 372 struct bundle *bundle = (struct bundle *)v; 373 struct datalink *dl; 374 375 if (isncp(fp->proto) && !ncp_LayersUnfinished(&bundle->ncp)) { 376 if (bundle_Phase(bundle) != PHASE_DEAD) 377 bundle_NewPhase(bundle, PHASE_TERMINATE); 378 for (dl = bundle->links; dl; dl = dl->next) 379 if (dl->state == DATALINK_OPEN) 380 datalink_Close(dl, CLOSE_STAYDOWN); 381 fsm2initial(fp); 382 mp_Down(&bundle->ncp.mp); 383 } 384 } 385 386 void 387 bundle_Close(struct bundle *bundle, const char *name, int how) 388 { 389 /* 390 * Please close the given datalink. 391 * If name == NULL or name is the last datalink, fsm_Close all NCPs 392 * (except our MP) 393 * If it isn't the last datalink, just Close that datalink. 394 */ 395 396 struct datalink *dl, *this_dl; 397 int others_active; 398 399 others_active = 0; 400 this_dl = NULL; 401 402 for (dl = bundle->links; dl; dl = dl->next) { 403 if (name && !strcasecmp(name, dl->name)) 404 this_dl = dl; 405 if (name == NULL || this_dl == dl) { 406 switch (how) { 407 case CLOSE_LCP: 408 datalink_DontHangup(dl); 409 break; 410 case CLOSE_STAYDOWN: 411 datalink_StayDown(dl); 412 break; 413 } 414 } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 415 others_active++; 416 } 417 418 if (name && this_dl == NULL) { 419 log_Printf(LogWARN, "%s: Invalid datalink name\n", name); 420 return; 421 } 422 423 if (!others_active) { 424 #ifndef NORADIUS 425 if (bundle->radius.sessiontime) 426 bundle_StopSessionTimer(bundle); 427 #endif 428 bundle_StopIdleTimer(bundle); 429 if (ncp_LayersUnfinished(&bundle->ncp)) 430 ncp_Close(&bundle->ncp); 431 else { 432 ncp2initial(&bundle->ncp); 433 mp_Down(&bundle->ncp.mp); 434 for (dl = bundle->links; dl; dl = dl->next) 435 datalink_Close(dl, how); 436 } 437 } else if (this_dl && this_dl->state != DATALINK_CLOSED && 438 this_dl->state != DATALINK_HANGUP) 439 datalink_Close(this_dl, how); 440 } 441 442 void 443 bundle_Down(struct bundle *bundle, int how) 444 { 445 struct datalink *dl; 446 447 for (dl = bundle->links; dl; dl = dl->next) 448 datalink_Down(dl, how); 449 } 450 451 static int 452 bundle_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 453 { 454 struct bundle *bundle = descriptor2bundle(d); 455 struct datalink *dl; 456 int result, nlinks; 457 u_short ifqueue; 458 size_t queued; 459 460 result = 0; 461 462 /* If there are aren't many packets queued, look for some more. */ 463 for (nlinks = 0, dl = bundle->links; dl; dl = dl->next) 464 nlinks++; 465 466 if (nlinks) { 467 queued = r ? ncp_FillPhysicalQueues(&bundle->ncp, bundle) : 468 ncp_QueueLen(&bundle->ncp); 469 470 if (r && (bundle->phase == PHASE_NETWORK || 471 bundle->phys_type.all & PHYS_AUTO)) { 472 /* enough surplus so that we can tell if we're getting swamped */ 473 ifqueue = nlinks > bundle->cfg.ifqueue ? nlinks : bundle->cfg.ifqueue; 474 if (queued < ifqueue) { 475 /* Not enough - select() for more */ 476 if (bundle->choked.timer.state == TIMER_RUNNING) 477 timer_Stop(&bundle->choked.timer); /* Not needed any more */ 478 FD_SET(bundle->dev.fd, r); 479 if (*n < bundle->dev.fd + 1) 480 *n = bundle->dev.fd + 1; 481 log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd); 482 result++; 483 } else if (bundle->choked.timer.state == TIMER_STOPPED) { 484 bundle->choked.timer.func = bundle_ClearQueues; 485 bundle->choked.timer.name = "output choke"; 486 bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS; 487 bundle->choked.timer.arg = bundle; 488 timer_Start(&bundle->choked.timer); 489 } 490 } 491 } 492 493 #ifndef NORADIUS 494 result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n); 495 #endif 496 497 /* Which links need a select() ? */ 498 for (dl = bundle->links; dl; dl = dl->next) 499 result += descriptor_UpdateSet(&dl->desc, r, w, e, n); 500 501 /* 502 * This *MUST* be called after the datalink UpdateSet()s as it 503 * might be ``holding'' one of the datalinks (death-row) and 504 * wants to be able to de-select() it from the descriptor set. 505 */ 506 result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n); 507 508 return result; 509 } 510 511 static int 512 bundle_IsSet(struct fdescriptor *d, const fd_set *fdset) 513 { 514 struct bundle *bundle = descriptor2bundle(d); 515 struct datalink *dl; 516 517 for (dl = bundle->links; dl; dl = dl->next) 518 if (descriptor_IsSet(&dl->desc, fdset)) 519 return 1; 520 521 #ifndef NORADIUS 522 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 523 return 1; 524 #endif 525 526 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 527 return 1; 528 529 return FD_ISSET(bundle->dev.fd, fdset); 530 } 531 532 static void 533 bundle_DescriptorRead(struct fdescriptor *d, struct bundle *bundle, 534 const fd_set *fdset) 535 { 536 struct datalink *dl; 537 unsigned secs; 538 u_int32_t af; 539 540 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 541 descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset); 542 543 for (dl = bundle->links; dl; dl = dl->next) 544 if (descriptor_IsSet(&dl->desc, fdset)) 545 descriptor_Read(&dl->desc, bundle, fdset); 546 547 #ifndef NORADIUS 548 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 549 descriptor_Read(&bundle->radius.desc, bundle, fdset); 550 #endif 551 552 if (FD_ISSET(bundle->dev.fd, fdset)) { 553 struct tun_data tun; 554 int n, pri; 555 u_char *data; 556 size_t sz; 557 558 if (bundle->dev.header) { 559 data = (u_char *)&tun; 560 sz = sizeof tun; 561 } else { 562 data = tun.data; 563 sz = sizeof tun.data; 564 } 565 566 /* something to read from tun */ 567 568 n = read(bundle->dev.fd, data, sz); 569 if (n < 0) { 570 log_Printf(LogWARN, "%s: read: %s\n", bundle->dev.Name, strerror(errno)); 571 return; 572 } 573 574 if (bundle->dev.header) { 575 n -= sz - sizeof tun.data; 576 if (n <= 0) { 577 log_Printf(LogERROR, "%s: read: Got only %d bytes of data !\n", 578 bundle->dev.Name, n); 579 return; 580 } 581 af = ntohl(tun.header.family); 582 #ifndef NOINET6 583 if (af != AF_INET && af != AF_INET6) 584 #else 585 if (af != AF_INET) 586 #endif 587 /* XXX: Should be maintaining drop/family counts ! */ 588 return; 589 } else 590 af = AF_INET; 591 592 if (af == AF_INET && ((struct ip *)tun.data)->ip_dst.s_addr == 593 bundle->ncp.ipcp.my_ip.s_addr) { 594 /* we've been asked to send something addressed *to* us :( */ 595 if (Enabled(bundle, OPT_LOOPBACK)) { 596 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.in, 597 NULL, NULL); 598 if (pri >= 0) { 599 n += sz - sizeof tun.data; 600 write(bundle->dev.fd, data, n); 601 log_Printf(LogDEBUG, "Looped back packet addressed to myself\n"); 602 } 603 return; 604 } else 605 log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n"); 606 } 607 608 /* 609 * Process on-demand dialup. Output packets are queued within the tunnel 610 * device until the appropriate NCP is opened. 611 */ 612 613 if (bundle_Phase(bundle) == PHASE_DEAD) { 614 /* 615 * Note, we must be in AUTO mode :-/ otherwise our interface should 616 * *not* be UP and we can't receive data 617 */ 618 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.dial, 619 NULL, NULL); 620 if (pri >= 0) 621 bundle_Open(bundle, NULL, PHYS_AUTO, 0); 622 else 623 /* 624 * Drop the packet. If we were to queue it, we'd just end up with 625 * a pile of timed-out data in our output queue by the time we get 626 * around to actually dialing. We'd also prematurely reach the 627 * threshold at which we stop select()ing to read() the tun 628 * device - breaking auto-dial. 629 */ 630 return; 631 } 632 633 secs = 0; 634 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.out, 635 NULL, &secs); 636 if (pri >= 0) { 637 /* Prepend the number of seconds timeout given in the filter */ 638 tun.header.timeout = secs; 639 ncp_Enqueue(&bundle->ncp, af, pri, (char *)&tun, n + sizeof tun.header); 640 } 641 } 642 } 643 644 static int 645 bundle_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle, 646 const fd_set *fdset) 647 { 648 struct datalink *dl; 649 int result = 0; 650 651 /* This is not actually necessary as struct mpserver doesn't Write() */ 652 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 653 if (descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset) == 1) 654 result++; 655 656 for (dl = bundle->links; dl; dl = dl->next) 657 if (descriptor_IsSet(&dl->desc, fdset)) 658 switch (descriptor_Write(&dl->desc, bundle, fdset)) { 659 case -1: 660 datalink_ComeDown(dl, CLOSE_NORMAL); 661 break; 662 case 1: 663 result++; 664 } 665 666 return result; 667 } 668 669 void 670 bundle_LockTun(struct bundle *bundle) 671 { 672 FILE *lockfile; 673 char pidfile[PATH_MAX]; 674 675 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 676 lockfile = ID0fopen(pidfile, "w"); 677 if (lockfile != NULL) { 678 fprintf(lockfile, "%d\n", (int)getpid()); 679 fclose(lockfile); 680 } else 681 log_Printf(LogERROR, "Warning: Can't create %s: %s\n", 682 pidfile, strerror(errno)); 683 } 684 685 static void 686 bundle_UnlockTun(struct bundle *bundle) 687 { 688 char pidfile[PATH_MAX]; 689 690 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 691 ID0unlink(pidfile); 692 } 693 694 struct bundle * 695 bundle_Create(const char *prefix, int type, int unit) 696 { 697 static struct bundle bundle; /* there can be only one */ 698 int enoentcount, err, minunit, maxunit; 699 const char *ifname; 700 #if defined(__DragonFly__) && !defined(NOKLDLOAD) 701 int kldtried; 702 #endif 703 #if defined(TUNSIFMODE) || defined(TUNSLMODE) || defined(TUNSIFHEAD) 704 int iff; 705 #endif 706 707 if (bundle.iface != NULL) { /* Already allocated ! */ 708 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n"); 709 return NULL; 710 } 711 712 if (unit == -1) { 713 minunit = 0; 714 maxunit = -1; 715 } else { 716 minunit = unit; 717 maxunit = unit + 1; 718 } 719 err = ENOENT; 720 enoentcount = 0; 721 #if defined(__DragonFly__) && !defined(NOKLDLOAD) 722 kldtried = 0; 723 #endif 724 for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) { 725 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d", 726 prefix, bundle.unit); 727 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR); 728 if (bundle.dev.fd >= 0) 729 break; 730 else if (errno == ENXIO || errno == ENOENT) { 731 #if defined(__DragonFly__) && !defined(NOKLDLOAD) 732 if (bundle.unit == minunit && !kldtried++) { 733 /* 734 * Attempt to load the tunnel interface KLD if it isn't loaded 735 * already. 736 */ 737 if (loadmodules(LOAD_VERBOSLY, "if_tun", NULL)) 738 bundle.unit--; 739 continue; 740 } 741 #endif 742 if (errno != ENOENT || ++enoentcount > 2) { 743 err = errno; 744 break; 745 } 746 } else 747 err = errno; 748 } 749 750 if (bundle.dev.fd < 0) { 751 if (unit == -1) 752 log_Printf(LogWARN, "No available tunnel devices found (%s)\n", 753 strerror(err)); 754 else 755 log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err)); 756 return NULL; 757 } 758 759 log_SetTun(bundle.unit); 760 761 ifname = strrchr(bundle.dev.Name, '/'); 762 if (ifname == NULL) 763 ifname = bundle.dev.Name; 764 else 765 ifname++; 766 767 bundle.iface = iface_Create(ifname); 768 if (bundle.iface == NULL) { 769 close(bundle.dev.fd); 770 return NULL; 771 } 772 773 #ifdef TUNSIFMODE 774 /* Make sure we're POINTOPOINT & IFF_MULTICAST */ 775 iff = IFF_POINTOPOINT | IFF_MULTICAST; 776 if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0) 777 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n", 778 strerror(errno)); 779 #endif 780 781 #ifdef TUNSLMODE 782 /* Make sure we're not prepending sockaddrs */ 783 iff = 0; 784 if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0) 785 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n", 786 strerror(errno)); 787 #endif 788 789 #ifdef TUNSIFHEAD 790 /* We want the address family please ! */ 791 iff = 1; 792 if (ID0ioctl(bundle.dev.fd, TUNSIFHEAD, &iff) < 0) { 793 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFHEAD): %s\n", 794 strerror(errno)); 795 bundle.dev.header = 0; 796 } else 797 bundle.dev.header = 1; 798 #else 799 #ifdef __OpenBSD__ 800 /* Always present for OpenBSD */ 801 bundle.dev.header = 1; 802 #else 803 /* 804 * If TUNSIFHEAD isn't available and we're not OpenBSD, assume 805 * everything's AF_INET (hopefully the tun device won't pass us 806 * anything else !). 807 */ 808 bundle.dev.header = 0; 809 #endif 810 #endif 811 812 log_Printf(LogPHASE, "Using interface: %s\n", ifname); 813 814 bundle.bandwidth = 0; 815 bundle.routing_seq = 0; 816 bundle.phase = PHASE_DEAD; 817 bundle.CleaningUp = 0; 818 bundle.NatEnabled = 0; 819 820 bundle.fsm.LayerStart = bundle_LayerStart; 821 bundle.fsm.LayerUp = bundle_LayerUp; 822 bundle.fsm.LayerDown = bundle_LayerDown; 823 bundle.fsm.LayerFinish = bundle_LayerFinish; 824 bundle.fsm.object = &bundle; 825 826 bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT; 827 bundle.cfg.idle.min_timeout = 0; 828 *bundle.cfg.auth.name = '\0'; 829 *bundle.cfg.auth.key = '\0'; 830 bundle.cfg.opt = OPT_IDCHECK | OPT_LOOPBACK | OPT_SROUTES | OPT_TCPMSSFIXUP | 831 OPT_THROUGHPUT | OPT_UTMP; 832 #ifndef NOINET6 833 bundle.cfg.opt |= OPT_IPCP; 834 if (probe.ipv6_available) 835 bundle.cfg.opt |= OPT_IPV6CP; 836 #endif 837 *bundle.cfg.label = '\0'; 838 bundle.cfg.ifqueue = DEF_IFQUEUE; 839 bundle.cfg.choked.timeout = CHOKED_TIMEOUT; 840 bundle.phys_type.all = type; 841 bundle.phys_type.open = 0; 842 bundle.upat = 0; 843 844 bundle.links = datalink_Create("deflink", &bundle, type); 845 if (bundle.links == NULL) { 846 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno)); 847 iface_Destroy(bundle.iface); 848 bundle.iface = NULL; 849 close(bundle.dev.fd); 850 return NULL; 851 } 852 853 bundle.desc.type = BUNDLE_DESCRIPTOR; 854 bundle.desc.UpdateSet = bundle_UpdateSet; 855 bundle.desc.IsSet = bundle_IsSet; 856 bundle.desc.Read = bundle_DescriptorRead; 857 bundle.desc.Write = bundle_DescriptorWrite; 858 859 ncp_Init(&bundle.ncp, &bundle); 860 861 memset(&bundle.filter, '\0', sizeof bundle.filter); 862 bundle.filter.in.fragok = bundle.filter.in.logok = 1; 863 bundle.filter.in.name = "IN"; 864 bundle.filter.out.fragok = bundle.filter.out.logok = 1; 865 bundle.filter.out.name = "OUT"; 866 bundle.filter.dial.name = "DIAL"; 867 bundle.filter.dial.logok = 1; 868 bundle.filter.alive.name = "ALIVE"; 869 bundle.filter.alive.logok = 1; 870 { 871 int i; 872 for (i = 0; i < MAXFILTERS; i++) { 873 bundle.filter.in.rule[i].f_action = A_NONE; 874 bundle.filter.out.rule[i].f_action = A_NONE; 875 bundle.filter.dial.rule[i].f_action = A_NONE; 876 bundle.filter.alive.rule[i].f_action = A_NONE; 877 } 878 } 879 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer); 880 bundle.idle.done = 0; 881 bundle.notify.fd = -1; 882 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer); 883 #ifndef NORADIUS 884 radius_Init(&bundle.radius); 885 #endif 886 887 /* Clean out any leftover crud */ 888 iface_Clear(bundle.iface, &bundle.ncp, 0, IFACE_CLEAR_ALL); 889 890 bundle_LockTun(&bundle); 891 892 return &bundle; 893 } 894 895 static void 896 bundle_DownInterface(struct bundle *bundle) 897 { 898 route_IfDelete(bundle, 1); 899 iface_ClearFlags(bundle->iface->name, IFF_UP); 900 } 901 902 void 903 bundle_Destroy(struct bundle *bundle) 904 { 905 struct datalink *dl; 906 907 /* 908 * Clean up the interface. We don't really need to do the timer_Stop()s, 909 * mp_Down(), iface_Clear() and bundle_DownInterface() unless we're getting 910 * out under exceptional conditions such as a descriptor exception. 911 */ 912 timer_Stop(&bundle->idle.timer); 913 timer_Stop(&bundle->choked.timer); 914 mp_Down(&bundle->ncp.mp); 915 iface_Clear(bundle->iface, &bundle->ncp, 0, IFACE_CLEAR_ALL); 916 bundle_DownInterface(bundle); 917 918 #ifndef NORADIUS 919 /* Tell the radius server the bad news */ 920 radius_Destroy(&bundle->radius); 921 #endif 922 923 /* Again, these are all DATALINK_CLOSED unless we're abending */ 924 dl = bundle->links; 925 while (dl) 926 dl = datalink_Destroy(dl); 927 928 ncp_Destroy(&bundle->ncp); 929 930 close(bundle->dev.fd); 931 bundle_UnlockTun(bundle); 932 933 /* In case we never made PHASE_NETWORK */ 934 bundle_Notify(bundle, EX_ERRDEAD); 935 936 iface_Destroy(bundle->iface); 937 bundle->iface = NULL; 938 } 939 940 void 941 bundle_LinkClosed(struct bundle *bundle, struct datalink *dl) 942 { 943 /* 944 * Our datalink has closed. 945 * CleanDatalinks() (called from DoLoop()) will remove closed 946 * BACKGROUND, FOREGROUND and DIRECT links. 947 * If it's the last data link, enter phase DEAD. 948 * 949 * NOTE: dl may not be in our list (bundle_SendDatalink()) ! 950 */ 951 952 struct datalink *odl; 953 int other_links; 954 955 log_SetTtyCommandMode(dl); 956 957 other_links = 0; 958 for (odl = bundle->links; odl; odl = odl->next) 959 if (odl != dl && odl->state != DATALINK_CLOSED) 960 other_links++; 961 962 if (!other_links) { 963 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */ 964 bundle_DownInterface(bundle); 965 ncp2initial(&bundle->ncp); 966 mp_Down(&bundle->ncp.mp); 967 bundle_NewPhase(bundle, PHASE_DEAD); 968 #ifndef NORADIUS 969 if (bundle->radius.sessiontime) 970 bundle_StopSessionTimer(bundle); 971 #endif 972 bundle_StopIdleTimer(bundle); 973 } 974 } 975 976 void 977 bundle_Open(struct bundle *bundle, const char *name, int mask, int force) 978 { 979 /* 980 * Please open the given datalink, or all if name == NULL 981 */ 982 struct datalink *dl; 983 984 for (dl = bundle->links; dl; dl = dl->next) 985 if (name == NULL || !strcasecmp(dl->name, name)) { 986 if ((mask & dl->physical->type) && 987 (dl->state == DATALINK_CLOSED || 988 (force && dl->state == DATALINK_OPENING && 989 dl->dial.timer.state == TIMER_RUNNING) || 990 dl->state == DATALINK_READY)) { 991 timer_Stop(&dl->dial.timer); /* We're finished with this */ 992 datalink_Up(dl, 1, 1); 993 if (mask & PHYS_AUTO) 994 break; /* Only one AUTO link at a time */ 995 } 996 if (name != NULL) 997 break; 998 } 999 } 1000 1001 struct datalink * 1002 bundle2datalink(struct bundle *bundle, const char *name) 1003 { 1004 struct datalink *dl; 1005 1006 if (name != NULL) { 1007 for (dl = bundle->links; dl; dl = dl->next) 1008 if (!strcasecmp(dl->name, name)) 1009 return dl; 1010 } else if (bundle->links && !bundle->links->next) 1011 return bundle->links; 1012 1013 return NULL; 1014 } 1015 1016 int 1017 bundle_ShowLinks(struct cmdargs const *arg) 1018 { 1019 struct datalink *dl; 1020 struct pppThroughput *t; 1021 unsigned long long octets; 1022 int secs; 1023 1024 for (dl = arg->bundle->links; dl; dl = dl->next) { 1025 octets = MAX(dl->physical->link.stats.total.in.OctetsPerSecond, 1026 dl->physical->link.stats.total.out.OctetsPerSecond); 1027 1028 prompt_Printf(arg->prompt, "Name: %s [%s, %s]", 1029 dl->name, mode2Nam(dl->physical->type), datalink_State(dl)); 1030 if (dl->physical->link.stats.total.rolling && dl->state == DATALINK_OPEN) 1031 prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)", 1032 dl->mp.bandwidth ? dl->mp.bandwidth : 1033 physical_GetSpeed(dl->physical), 1034 octets * 8, octets); 1035 prompt_Printf(arg->prompt, "\n"); 1036 } 1037 1038 t = &arg->bundle->ncp.mp.link.stats.total; 1039 octets = MAX(t->in.OctetsPerSecond, t->out.OctetsPerSecond); 1040 secs = t->downtime ? 0 : throughput_uptime(t); 1041 if (secs > t->SamplePeriod) 1042 secs = t->SamplePeriod; 1043 if (secs) 1044 prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)" 1045 " over the last %d secs\n", octets * 8, octets, secs); 1046 1047 return 0; 1048 } 1049 1050 static const char * 1051 optval(struct bundle *bundle, int bit) 1052 { 1053 return (bundle->cfg.opt & bit) ? "enabled" : "disabled"; 1054 } 1055 1056 int 1057 bundle_ShowStatus(struct cmdargs const *arg) 1058 { 1059 int remaining; 1060 1061 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle)); 1062 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name); 1063 prompt_Printf(arg->prompt, " Interface: %s @ %lubps", 1064 arg->bundle->iface->name, arg->bundle->bandwidth); 1065 1066 if (arg->bundle->upat) { 1067 int secs = bundle_Uptime(arg->bundle); 1068 1069 prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600, 1070 (secs / 60) % 60, secs % 60); 1071 } 1072 prompt_Printf(arg->prompt, "\n Queued: %lu of %u\n", 1073 (unsigned long)ncp_QueueLen(&arg->bundle->ncp), 1074 arg->bundle->cfg.ifqueue); 1075 1076 prompt_Printf(arg->prompt, "\nDefaults:\n"); 1077 prompt_Printf(arg->prompt, " Label: %s\n", 1078 arg->bundle->cfg.label); 1079 prompt_Printf(arg->prompt, " Auth name: %s\n", 1080 arg->bundle->cfg.auth.name); 1081 prompt_Printf(arg->prompt, " Diagnostic socket: "); 1082 if (*server.cfg.sockname != '\0') { 1083 prompt_Printf(arg->prompt, "%s", server.cfg.sockname); 1084 if (server.cfg.mask != (mode_t)-1) 1085 prompt_Printf(arg->prompt, ", mask 0%03o", (int)server.cfg.mask); 1086 prompt_Printf(arg->prompt, "%s\n", server.fd == -1 ? " (not open)" : ""); 1087 } else if (server.cfg.port != 0) 1088 prompt_Printf(arg->prompt, "TCP port %d%s\n", server.cfg.port, 1089 server.fd == -1 ? " (not open)" : ""); 1090 else 1091 prompt_Printf(arg->prompt, "none\n"); 1092 1093 prompt_Printf(arg->prompt, " Choked Timer: %ds\n", 1094 arg->bundle->cfg.choked.timeout); 1095 1096 #ifndef NORADIUS 1097 radius_Show(&arg->bundle->radius, arg->prompt); 1098 #endif 1099 1100 prompt_Printf(arg->prompt, " Idle Timer: "); 1101 if (arg->bundle->cfg.idle.timeout) { 1102 prompt_Printf(arg->prompt, "%ds", arg->bundle->cfg.idle.timeout); 1103 if (arg->bundle->cfg.idle.min_timeout) 1104 prompt_Printf(arg->prompt, ", min %ds", 1105 arg->bundle->cfg.idle.min_timeout); 1106 remaining = bundle_RemainingIdleTime(arg->bundle); 1107 if (remaining != -1) 1108 prompt_Printf(arg->prompt, " (%ds remaining)", remaining); 1109 prompt_Printf(arg->prompt, "\n"); 1110 } else 1111 prompt_Printf(arg->prompt, "disabled\n"); 1112 1113 prompt_Printf(arg->prompt, " Filter Decap: %-20.20s", 1114 optval(arg->bundle, OPT_FILTERDECAP)); 1115 prompt_Printf(arg->prompt, " ID check: %s\n", 1116 optval(arg->bundle, OPT_IDCHECK)); 1117 prompt_Printf(arg->prompt, " Iface-Alias: %-20.20s", 1118 optval(arg->bundle, OPT_IFACEALIAS)); 1119 #ifndef NOINET6 1120 prompt_Printf(arg->prompt, " IPCP: %s\n", 1121 optval(arg->bundle, OPT_IPCP)); 1122 prompt_Printf(arg->prompt, " IPV6CP: %-20.20s", 1123 optval(arg->bundle, OPT_IPV6CP)); 1124 #endif 1125 prompt_Printf(arg->prompt, " Keep-Session: %s\n", 1126 optval(arg->bundle, OPT_KEEPSESSION)); 1127 prompt_Printf(arg->prompt, " Loopback: %-20.20s", 1128 optval(arg->bundle, OPT_LOOPBACK)); 1129 prompt_Printf(arg->prompt, " PasswdAuth: %s\n", 1130 optval(arg->bundle, OPT_PASSWDAUTH)); 1131 prompt_Printf(arg->prompt, " Proxy: %-20.20s", 1132 optval(arg->bundle, OPT_PROXY)); 1133 prompt_Printf(arg->prompt, " Proxyall: %s\n", 1134 optval(arg->bundle, OPT_PROXYALL)); 1135 prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s", 1136 optval(arg->bundle, OPT_SROUTES)); 1137 prompt_Printf(arg->prompt, " TCPMSS Fixup: %s\n", 1138 optval(arg->bundle, OPT_TCPMSSFIXUP)); 1139 prompt_Printf(arg->prompt, " Throughput: %-20.20s", 1140 optval(arg->bundle, OPT_THROUGHPUT)); 1141 prompt_Printf(arg->prompt, " Utmp Logging: %s\n", 1142 optval(arg->bundle, OPT_UTMP)); 1143 1144 return 0; 1145 } 1146 1147 static void 1148 bundle_IdleTimeout(void *v) 1149 { 1150 struct bundle *bundle = (struct bundle *)v; 1151 1152 log_Printf(LogPHASE, "Idle timer expired\n"); 1153 bundle_StopIdleTimer(bundle); 1154 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1155 } 1156 1157 /* 1158 * Start Idle timer. If timeout is reached, we call bundle_Close() to 1159 * close LCP and link. 1160 */ 1161 void 1162 bundle_StartIdleTimer(struct bundle *bundle, unsigned secs) 1163 { 1164 timer_Stop(&bundle->idle.timer); 1165 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1166 bundle->phys_type.open && bundle->cfg.idle.timeout) { 1167 time_t now = time(NULL); 1168 1169 if (secs == 0) 1170 secs = bundle->cfg.idle.timeout; 1171 1172 /* We want at least `secs' */ 1173 if (bundle->cfg.idle.min_timeout > secs && bundle->upat) { 1174 int up = now - bundle->upat; 1175 1176 if ((long long)bundle->cfg.idle.min_timeout - up > (long long)secs) 1177 /* Only increase from the current `remaining' value */ 1178 secs = bundle->cfg.idle.min_timeout - up; 1179 } 1180 bundle->idle.timer.func = bundle_IdleTimeout; 1181 bundle->idle.timer.name = "idle"; 1182 bundle->idle.timer.load = secs * SECTICKS; 1183 bundle->idle.timer.arg = bundle; 1184 timer_Start(&bundle->idle.timer); 1185 bundle->idle.done = now + secs; 1186 } 1187 } 1188 1189 void 1190 bundle_SetIdleTimer(struct bundle *bundle, int timeout, int min_timeout) 1191 { 1192 bundle->cfg.idle.timeout = timeout; 1193 if (min_timeout >= 0) 1194 bundle->cfg.idle.min_timeout = min_timeout; 1195 if (ncp_LayersOpen(&bundle->ncp)) 1196 bundle_StartIdleTimer(bundle, 0); 1197 } 1198 1199 void 1200 bundle_StopIdleTimer(struct bundle *bundle) 1201 { 1202 timer_Stop(&bundle->idle.timer); 1203 bundle->idle.done = 0; 1204 } 1205 1206 static int 1207 bundle_RemainingIdleTime(struct bundle *bundle) 1208 { 1209 if (bundle->idle.done) 1210 return bundle->idle.done - time(NULL); 1211 return -1; 1212 } 1213 1214 #ifndef NORADIUS 1215 1216 static void 1217 bundle_SessionTimeout(void *v) 1218 { 1219 struct bundle *bundle = (struct bundle *)v; 1220 1221 log_Printf(LogPHASE, "Session-Timeout timer expired\n"); 1222 bundle_StopSessionTimer(bundle); 1223 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1224 } 1225 1226 void 1227 bundle_StartSessionTimer(struct bundle *bundle, unsigned secs) 1228 { 1229 timer_Stop(&bundle->session.timer); 1230 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1231 bundle->phys_type.open && bundle->radius.sessiontime) { 1232 time_t now = time(NULL); 1233 1234 if (secs == 0) 1235 secs = bundle->radius.sessiontime; 1236 1237 bundle->session.timer.func = bundle_SessionTimeout; 1238 bundle->session.timer.name = "session"; 1239 bundle->session.timer.load = secs * SECTICKS; 1240 bundle->session.timer.arg = bundle; 1241 timer_Start(&bundle->session.timer); 1242 bundle->session.done = now + secs; 1243 } 1244 } 1245 1246 void 1247 bundle_StopSessionTimer(struct bundle *bundle) 1248 { 1249 timer_Stop(&bundle->session.timer); 1250 bundle->session.done = 0; 1251 } 1252 1253 #endif 1254 1255 int 1256 bundle_IsDead(struct bundle *bundle) 1257 { 1258 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp); 1259 } 1260 1261 static struct datalink * 1262 bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl) 1263 { 1264 struct datalink **dlp; 1265 1266 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next) 1267 if (*dlp == dl) { 1268 *dlp = dl->next; 1269 dl->next = NULL; 1270 bundle_LinksRemoved(bundle); 1271 return dl; 1272 } 1273 1274 return NULL; 1275 } 1276 1277 static void 1278 bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl) 1279 { 1280 struct datalink **dlp = &bundle->links; 1281 1282 while (*dlp) 1283 dlp = &(*dlp)->next; 1284 1285 *dlp = dl; 1286 dl->next = NULL; 1287 1288 bundle_LinkAdded(bundle, dl); 1289 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1290 } 1291 1292 void 1293 bundle_CleanDatalinks(struct bundle *bundle) 1294 { 1295 struct datalink **dlp = &bundle->links; 1296 int found = 0; 1297 1298 while (*dlp) 1299 if ((*dlp)->state == DATALINK_CLOSED && 1300 (*dlp)->physical->type & 1301 (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) { 1302 *dlp = datalink_Destroy(*dlp); 1303 found++; 1304 } else 1305 dlp = &(*dlp)->next; 1306 1307 if (found) 1308 bundle_LinksRemoved(bundle); 1309 } 1310 1311 int 1312 bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl, 1313 const char *name) 1314 { 1315 if (bundle2datalink(bundle, name)) { 1316 log_Printf(LogWARN, "Clone: %s: name already exists\n", name); 1317 return 0; 1318 } 1319 1320 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name)); 1321 return 1; 1322 } 1323 1324 void 1325 bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl) 1326 { 1327 dl = bundle_DatalinkLinkout(bundle, dl); 1328 if (dl) 1329 datalink_Destroy(dl); 1330 } 1331 1332 void 1333 bundle_SetLabel(struct bundle *bundle, const char *label) 1334 { 1335 if (label) 1336 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1); 1337 else 1338 *bundle->cfg.label = '\0'; 1339 } 1340 1341 const char * 1342 bundle_GetLabel(struct bundle *bundle) 1343 { 1344 return *bundle->cfg.label ? bundle->cfg.label : NULL; 1345 } 1346 1347 int 1348 bundle_LinkSize(void) 1349 { 1350 struct iovec iov[SCATTER_SEGMENTS]; 1351 int niov, expect, f; 1352 1353 iov[0].iov_len = strlen(Version) + 1; 1354 iov[0].iov_base = NULL; 1355 niov = 1; 1356 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1357 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1358 return 0; 1359 } 1360 1361 for (f = expect = 0; f < niov; f++) 1362 expect += iov[f].iov_len; 1363 1364 return expect; 1365 } 1366 1367 void 1368 bundle_ReceiveDatalink(struct bundle *bundle, int s) 1369 { 1370 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1371 int niov, expect, f, *fd, nfd, onfd, got; 1372 struct iovec iov[SCATTER_SEGMENTS]; 1373 struct cmsghdr *cmsg; 1374 struct msghdr msg; 1375 struct datalink *dl; 1376 pid_t pid; 1377 1378 log_Printf(LogPHASE, "Receiving datalink\n"); 1379 1380 /* 1381 * Create our scatter/gather array - passing NULL gets the space 1382 * allocation requirement rather than actually flattening the 1383 * structures. 1384 */ 1385 iov[0].iov_len = strlen(Version) + 1; 1386 iov[0].iov_base = NULL; 1387 niov = 1; 1388 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1389 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1390 return; 1391 } 1392 1393 /* Allocate the scatter/gather array for recvmsg() */ 1394 for (f = expect = 0; f < niov; f++) { 1395 if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) { 1396 log_Printf(LogERROR, "Cannot allocate space to receive link\n"); 1397 return; 1398 } 1399 if (f) 1400 expect += iov[f].iov_len; 1401 } 1402 1403 /* Set up our message */ 1404 cmsg = (struct cmsghdr *)cmsgbuf; 1405 cmsg->cmsg_len = sizeof cmsgbuf; 1406 cmsg->cmsg_level = SOL_SOCKET; 1407 cmsg->cmsg_type = 0; 1408 1409 memset(&msg, '\0', sizeof msg); 1410 msg.msg_name = NULL; 1411 msg.msg_namelen = 0; 1412 msg.msg_iov = iov; 1413 msg.msg_iovlen = 1; /* Only send the version at the first pass */ 1414 msg.msg_control = cmsgbuf; 1415 msg.msg_controllen = sizeof cmsgbuf; 1416 1417 log_Printf(LogDEBUG, "Expecting %u scatter/gather bytes\n", 1418 (unsigned)iov[0].iov_len); 1419 1420 if ((got = recvmsg(s, &msg, MSG_WAITALL)) != iov[0].iov_len) { 1421 if (got == -1) 1422 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); 1423 else 1424 log_Printf(LogERROR, "Failed recvmsg: Got %d, not %u\n", 1425 got, (unsigned)iov[0].iov_len); 1426 while (niov--) 1427 free(iov[niov].iov_base); 1428 return; 1429 } 1430 1431 if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { 1432 log_Printf(LogERROR, "Recvmsg: no descriptors received !\n"); 1433 while (niov--) 1434 free(iov[niov].iov_base); 1435 return; 1436 } 1437 1438 fd = (int *)CMSG_DATA(cmsg); 1439 nfd = ((caddr_t)cmsg + cmsg->cmsg_len - (caddr_t)fd) / sizeof(int); 1440 1441 if (nfd < 2) { 1442 log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n", 1443 nfd, nfd == 1 ? "" : "s"); 1444 while (nfd--) 1445 close(fd[nfd]); 1446 while (niov--) 1447 free(iov[niov].iov_base); 1448 return; 1449 } 1450 1451 /* 1452 * We've successfully received two or more open file descriptors 1453 * through our socket, plus a version string. Make sure it's the 1454 * correct version, and drop the connection if it's not. 1455 */ 1456 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) { 1457 log_Printf(LogWARN, "Cannot receive datalink, incorrect version" 1458 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len, 1459 (char *)iov[0].iov_base, Version); 1460 while (nfd--) 1461 close(fd[nfd]); 1462 while (niov--) 1463 free(iov[niov].iov_base); 1464 return; 1465 } 1466 1467 /* 1468 * Everything looks good. Send the other side our process id so that 1469 * they can transfer lock ownership, and wait for them to send the 1470 * actual link data. 1471 */ 1472 pid = getpid(); 1473 if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) { 1474 if (got == -1) 1475 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1476 else 1477 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, 1478 (int)(sizeof pid)); 1479 while (nfd--) 1480 close(fd[nfd]); 1481 while (niov--) 1482 free(iov[niov].iov_base); 1483 return; 1484 } 1485 1486 if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) { 1487 if (got == -1) 1488 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1489 else 1490 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, expect); 1491 while (nfd--) 1492 close(fd[nfd]); 1493 while (niov--) 1494 free(iov[niov].iov_base); 1495 return; 1496 } 1497 close(fd[1]); 1498 1499 onfd = nfd; /* We've got this many in our array */ 1500 nfd -= 2; /* Don't include p->fd and our reply descriptor */ 1501 niov = 1; /* Skip the version id */ 1502 dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, fd[0], 1503 fd + 2, &nfd); 1504 if (dl) { 1505 1506 if (nfd) { 1507 log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d " 1508 "auxiliary file descriptors (%d remain)\n", onfd, nfd); 1509 datalink_Destroy(dl); 1510 while (nfd--) 1511 close(fd[onfd--]); 1512 close(fd[0]); 1513 } else { 1514 bundle_DatalinkLinkin(bundle, dl); 1515 datalink_AuthOk(dl); 1516 bundle_CalculateBandwidth(dl->bundle); 1517 } 1518 } else { 1519 while (nfd--) 1520 close(fd[onfd--]); 1521 close(fd[0]); 1522 close(fd[1]); 1523 } 1524 1525 free(iov[0].iov_base); 1526 } 1527 1528 void 1529 bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun) 1530 { 1531 char cmsgbuf[CMSG_SPACE(sizeof(int) * SEND_MAXFD)]; 1532 const char *constlock; 1533 char *lock; 1534 struct cmsghdr *cmsg; 1535 struct msghdr msg; 1536 struct iovec iov[SCATTER_SEGMENTS]; 1537 int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2], got; 1538 pid_t newpid; 1539 1540 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name); 1541 1542 /* Record the base device name for a lock transfer later */ 1543 constlock = physical_LockedDevice(dl->physical); 1544 if (constlock) { 1545 lock = alloca(strlen(constlock) + 1); 1546 strcpy(lock, constlock); 1547 } else 1548 lock = NULL; 1549 1550 bundle_LinkClosed(dl->bundle, dl); 1551 bundle_DatalinkLinkout(dl->bundle, dl); 1552 1553 /* Build our scatter/gather array */ 1554 iov[0].iov_len = strlen(Version) + 1; 1555 iov[0].iov_base = strdup(Version); 1556 niov = 1; 1557 nfd = 0; 1558 1559 fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd); 1560 1561 if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) { 1562 /* 1563 * fd[1] is used to get the peer process id back, then to confirm that 1564 * we've transferred any device locks to that process id. 1565 */ 1566 fd[1] = reply[1]; 1567 1568 nfd += 2; /* Include fd[0] and fd[1] */ 1569 memset(&msg, '\0', sizeof msg); 1570 1571 msg.msg_name = NULL; 1572 msg.msg_namelen = 0; 1573 /* 1574 * Only send the version to start... We used to send the whole lot, but 1575 * this caused problems with our RECVBUF size as a single link is about 1576 * 22k ! This way, we should bump into no limits. 1577 */ 1578 msg.msg_iovlen = 1; 1579 msg.msg_iov = iov; 1580 msg.msg_control = cmsgbuf; 1581 msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfd); 1582 msg.msg_flags = 0; 1583 1584 cmsg = (struct cmsghdr *)cmsgbuf; 1585 cmsg->cmsg_len = msg.msg_controllen; 1586 cmsg->cmsg_level = SOL_SOCKET; 1587 cmsg->cmsg_type = SCM_RIGHTS; 1588 1589 for (f = 0; f < nfd; f++) 1590 *((int *)CMSG_DATA(cmsg) + f) = fd[f]; 1591 1592 for (f = 1, expect = 0; f < niov; f++) 1593 expect += iov[f].iov_len; 1594 1595 if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1) 1596 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1597 strerror(errno)); 1598 if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1) 1599 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1600 strerror(errno)); 1601 1602 log_Printf(LogDEBUG, "Sending %d descriptor%s and %u bytes in scatter" 1603 "/gather array\n", nfd, nfd == 1 ? "" : "s", 1604 (unsigned)iov[0].iov_len); 1605 1606 if ((got = sendmsg(s, &msg, 0)) == -1) 1607 log_Printf(LogERROR, "Failed sendmsg: %s: %s\n", 1608 sun->sun_path, strerror(errno)); 1609 else if (got != iov[0].iov_len) 1610 log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %d of %u\n", 1611 sun->sun_path, got, (unsigned)iov[0].iov_len); 1612 else { 1613 /* We must get the ACK before closing the descriptor ! */ 1614 int res; 1615 1616 if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) { 1617 log_Printf(LogDEBUG, "Received confirmation from pid %ld\n", 1618 (long)newpid); 1619 if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK) 1620 log_Printf(LogERROR, "uu_lock_txfr: %s\n", uu_lockerr(res)); 1621 1622 log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect); 1623 if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) { 1624 if (got == -1) 1625 log_Printf(LogERROR, "%s: Failed writev: %s\n", 1626 sun->sun_path, strerror(errno)); 1627 else 1628 log_Printf(LogERROR, "%s: Failed writev: Wrote %d of %d\n", 1629 sun->sun_path, got, expect); 1630 } 1631 } else if (got == -1) 1632 log_Printf(LogERROR, "%s: Failed socketpair read: %s\n", 1633 sun->sun_path, strerror(errno)); 1634 else 1635 log_Printf(LogERROR, "%s: Failed socketpair read: Got %d of %d\n", 1636 sun->sun_path, got, (int)(sizeof newpid)); 1637 } 1638 1639 close(reply[0]); 1640 close(reply[1]); 1641 1642 newsid = Enabled(dl->bundle, OPT_KEEPSESSION) || 1643 tcgetpgrp(fd[0]) == getpgrp(); 1644 while (nfd) 1645 close(fd[--nfd]); 1646 if (newsid) 1647 bundle_setsid(dl->bundle, got != -1); 1648 } 1649 close(s); 1650 1651 while (niov--) 1652 free(iov[niov].iov_base); 1653 } 1654 1655 int 1656 bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl, 1657 const char *name) 1658 { 1659 struct datalink *dl; 1660 1661 if (!strcasecmp(ndl->name, name)) 1662 return 1; 1663 1664 for (dl = bundle->links; dl; dl = dl->next) 1665 if (!strcasecmp(dl->name, name)) 1666 return 0; 1667 1668 datalink_Rename(ndl, name); 1669 return 1; 1670 } 1671 1672 int 1673 bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode) 1674 { 1675 int omode; 1676 1677 omode = dl->physical->type; 1678 if (omode == mode) 1679 return 1; 1680 1681 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO)) 1682 /* First auto link */ 1683 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) { 1684 log_Printf(LogWARN, "You must `set ifaddr' or `open' before" 1685 " changing mode to %s\n", mode2Nam(mode)); 1686 return 0; 1687 } 1688 1689 if (!datalink_SetMode(dl, mode)) 1690 return 0; 1691 1692 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) && 1693 bundle->phase != PHASE_NETWORK) 1694 /* First auto link, we need an interface */ 1695 ipcp_InterfaceUp(&bundle->ncp.ipcp); 1696 1697 /* Regenerate phys_type and adjust idle timer */ 1698 bundle_LinksRemoved(bundle); 1699 1700 return 1; 1701 } 1702 1703 void 1704 bundle_setsid(struct bundle *bundle, int holdsession) 1705 { 1706 /* 1707 * Lose the current session. This means getting rid of our pid 1708 * too so that the tty device will really go away, and any getty 1709 * etc will be allowed to restart. 1710 */ 1711 pid_t pid, orig; 1712 int fds[2]; 1713 char done; 1714 struct datalink *dl; 1715 1716 if (!holdsession && bundle_IsDead(bundle)) { 1717 /* 1718 * No need to lose our session after all... we're going away anyway 1719 * 1720 * We should really stop the timer and pause if holdsession is set and 1721 * the bundle's dead, but that leaves other resources lying about :-( 1722 */ 1723 return; 1724 } 1725 1726 orig = getpid(); 1727 if (pipe(fds) == -1) { 1728 log_Printf(LogERROR, "pipe: %s\n", strerror(errno)); 1729 return; 1730 } 1731 switch ((pid = fork())) { 1732 case -1: 1733 log_Printf(LogERROR, "fork: %s\n", strerror(errno)); 1734 close(fds[0]); 1735 close(fds[1]); 1736 return; 1737 case 0: 1738 close(fds[1]); 1739 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1740 close(fds[0]); 1741 if (pipe(fds) == -1) { 1742 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno)); 1743 return; 1744 } 1745 switch ((pid = fork())) { 1746 case -1: 1747 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno)); 1748 close(fds[0]); 1749 close(fds[1]); 1750 return; 1751 case 0: 1752 close(fds[1]); 1753 bundle_LockTun(bundle); /* update pid */ 1754 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1755 close(fds[0]); 1756 setsid(); 1757 bundle_ChangedPID(bundle); 1758 log_Printf(LogDEBUG, "%ld -> %ld: %s session control\n", 1759 (long)orig, (long)getpid(), 1760 holdsession ? "Passed" : "Dropped"); 1761 timer_InitService(0); /* Start the Timer Service */ 1762 break; 1763 default: 1764 close(fds[0]); 1765 /* Give away all our physical locks (to the final process) */ 1766 for (dl = bundle->links; dl; dl = dl->next) 1767 if (dl->state != DATALINK_CLOSED) 1768 physical_ChangedPid(dl->physical, pid); 1769 write(fds[1], "!", 1); /* done */ 1770 close(fds[1]); 1771 _exit(0); 1772 break; 1773 } 1774 break; 1775 default: 1776 close(fds[0]); 1777 /* Give away all our physical locks (to the intermediate process) */ 1778 for (dl = bundle->links; dl; dl = dl->next) 1779 if (dl->state != DATALINK_CLOSED) 1780 physical_ChangedPid(dl->physical, pid); 1781 write(fds[1], "!", 1); /* done */ 1782 close(fds[1]); 1783 if (holdsession) { 1784 int fd, status; 1785 1786 timer_TermService(); 1787 signal(SIGPIPE, SIG_DFL); 1788 signal(SIGALRM, SIG_DFL); 1789 signal(SIGHUP, SIG_DFL); 1790 signal(SIGTERM, SIG_DFL); 1791 signal(SIGINT, SIG_DFL); 1792 signal(SIGQUIT, SIG_DFL); 1793 for (fd = getdtablesize(); fd >= 0; fd--) 1794 close(fd); 1795 /* 1796 * Reap the intermediate process. As we're not exiting but the 1797 * intermediate is, we don't want it to become defunct. 1798 */ 1799 waitpid(pid, &status, 0); 1800 /* Tweak our process arguments.... */ 1801 SetTitle("session owner"); 1802 #ifndef NOSUID 1803 setuid(ID0realuid()); 1804 #endif 1805 /* 1806 * Hang around for a HUP. This should happen as soon as the 1807 * ppp that we passed our ctty descriptor to closes it. 1808 * NOTE: If this process dies, the passed descriptor becomes 1809 * invalid and will give a select() error by setting one 1810 * of the error fds, aborting the other ppp. We don't 1811 * want that to happen ! 1812 */ 1813 pause(); 1814 } 1815 _exit(0); 1816 break; 1817 } 1818 } 1819 1820 int 1821 bundle_HighestState(struct bundle *bundle) 1822 { 1823 struct datalink *dl; 1824 int result = DATALINK_CLOSED; 1825 1826 for (dl = bundle->links; dl; dl = dl->next) 1827 if (result < dl->state) 1828 result = dl->state; 1829 1830 return result; 1831 } 1832 1833 int 1834 bundle_Exception(struct bundle *bundle, int fd) 1835 { 1836 struct datalink *dl; 1837 1838 for (dl = bundle->links; dl; dl = dl->next) 1839 if (dl->physical->fd == fd) { 1840 datalink_Down(dl, CLOSE_NORMAL); 1841 return 1; 1842 } 1843 1844 return 0; 1845 } 1846 1847 void 1848 bundle_AdjustFilters(struct bundle *bundle, struct ncpaddr *local, 1849 struct ncpaddr *remote) 1850 { 1851 filter_AdjustAddr(&bundle->filter.in, local, remote, NULL); 1852 filter_AdjustAddr(&bundle->filter.out, local, remote, NULL); 1853 filter_AdjustAddr(&bundle->filter.dial, local, remote, NULL); 1854 filter_AdjustAddr(&bundle->filter.alive, local, remote, NULL); 1855 } 1856 1857 void 1858 bundle_AdjustDNS(struct bundle *bundle) 1859 { 1860 struct in_addr *dns = bundle->ncp.ipcp.ns.dns; 1861 1862 filter_AdjustAddr(&bundle->filter.in, NULL, NULL, dns); 1863 filter_AdjustAddr(&bundle->filter.out, NULL, NULL, dns); 1864 filter_AdjustAddr(&bundle->filter.dial, NULL, NULL, dns); 1865 filter_AdjustAddr(&bundle->filter.alive, NULL, NULL, dns); 1866 } 1867 1868 void 1869 bundle_CalculateBandwidth(struct bundle *bundle) 1870 { 1871 struct datalink *dl; 1872 int sp, overhead, maxoverhead; 1873 1874 bundle->bandwidth = 0; 1875 bundle->iface->mtu = 0; 1876 maxoverhead = 0; 1877 1878 for (dl = bundle->links; dl; dl = dl->next) { 1879 overhead = ccp_MTUOverhead(&dl->physical->link.ccp); 1880 if (maxoverhead < overhead) 1881 maxoverhead = overhead; 1882 if (dl->state == DATALINK_OPEN) { 1883 if ((sp = dl->mp.bandwidth) == 0 && 1884 (sp = physical_GetSpeed(dl->physical)) == 0) 1885 log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n", 1886 dl->name, dl->physical->name.full); 1887 else 1888 bundle->bandwidth += sp; 1889 if (!bundle->ncp.mp.active) { 1890 bundle->iface->mtu = dl->physical->link.lcp.his_mru; 1891 break; 1892 } 1893 } 1894 } 1895 1896 if (bundle->bandwidth == 0) 1897 bundle->bandwidth = 115200; /* Shrug */ 1898 1899 if (bundle->ncp.mp.active) { 1900 bundle->iface->mtu = bundle->ncp.mp.peer_mrru; 1901 overhead = ccp_MTUOverhead(&bundle->ncp.mp.link.ccp); 1902 if (maxoverhead < overhead) 1903 maxoverhead = overhead; 1904 } else if (!bundle->iface->mtu) 1905 bundle->iface->mtu = DEF_MRU; 1906 1907 #ifndef NORADIUS 1908 if (bundle->radius.valid && bundle->radius.mtu && 1909 bundle->radius.mtu < bundle->iface->mtu) { 1910 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n", 1911 bundle->radius.mtu); 1912 bundle->iface->mtu = bundle->radius.mtu; 1913 } 1914 #endif 1915 1916 if (maxoverhead) { 1917 log_Printf(LogLCP, "Reducing MTU from %d to %d (CCP requirement)\n", 1918 bundle->iface->mtu, bundle->iface->mtu - maxoverhead); 1919 bundle->iface->mtu -= maxoverhead; 1920 } 1921 1922 tun_configure(bundle); 1923 1924 route_UpdateMTU(bundle); 1925 } 1926 1927 void 1928 bundle_AutoAdjust(struct bundle *bundle, int percent, int what) 1929 { 1930 struct datalink *dl, *choice, *otherlinkup; 1931 1932 choice = otherlinkup = NULL; 1933 for (dl = bundle->links; dl; dl = dl->next) 1934 if (dl->physical->type == PHYS_AUTO) { 1935 if (dl->state == DATALINK_OPEN) { 1936 if (what == AUTO_DOWN) { 1937 if (choice) 1938 otherlinkup = choice; 1939 choice = dl; 1940 } 1941 } else if (dl->state == DATALINK_CLOSED) { 1942 if (what == AUTO_UP) { 1943 choice = dl; 1944 break; 1945 } 1946 } else { 1947 /* An auto link in an intermediate state - forget it for the moment */ 1948 choice = NULL; 1949 break; 1950 } 1951 } else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN) 1952 otherlinkup = dl; 1953 1954 if (choice) { 1955 if (what == AUTO_UP) { 1956 log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n", 1957 percent, choice->name); 1958 datalink_Up(choice, 1, 1); 1959 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1960 } else if (otherlinkup) { /* Only bring the second-last link down */ 1961 log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n", 1962 percent, choice->name); 1963 datalink_Close(choice, CLOSE_STAYDOWN); 1964 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1965 } 1966 } 1967 } 1968 1969 int 1970 bundle_WantAutoloadTimer(struct bundle *bundle) 1971 { 1972 struct datalink *dl; 1973 int autolink, opened; 1974 1975 if (bundle->phase == PHASE_NETWORK) { 1976 for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next) 1977 if (dl->physical->type == PHYS_AUTO) { 1978 if (++autolink == 2 || (autolink == 1 && opened)) 1979 /* Two auto links or one auto and one open in NETWORK phase */ 1980 return 1; 1981 } else if (dl->state == DATALINK_OPEN) { 1982 opened++; 1983 if (autolink) 1984 /* One auto and one open link in NETWORK phase */ 1985 return 1; 1986 } 1987 } 1988 1989 return 0; 1990 } 1991 1992 void 1993 bundle_ChangedPID(struct bundle *bundle) 1994 { 1995 #ifdef TUNSIFPID 1996 ioctl(bundle->dev.fd, TUNSIFPID, 0); 1997 #endif 1998 } 1999 2000 int 2001 bundle_Uptime(struct bundle *bundle) 2002 { 2003 if (bundle->upat) 2004 return time(NULL) - bundle->upat; 2005 2006 return 0; 2007 } 2008