bundle.c revision 55066
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: head/usr.sbin/ppp/bundle.c 55066 1999-12-23 21:43:25Z brian $ 27 */ 28 29#include <sys/param.h> 30#include <sys/socket.h> 31#include <netinet/in.h> 32#include <net/if.h> 33#include <net/if_tun.h> /* For TUNSIFMODE & TUNSLMODE */ 34#include <arpa/inet.h> 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 <stdio.h> 49#include <stdlib.h> 50#include <string.h> 51#include <sys/uio.h> 52#include <sys/wait.h> 53#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 54#include <sys/linker.h> 55#include <sys/module.h> 56#endif 57#include <termios.h> 58#include <unistd.h> 59 60#include "layer.h" 61#include "defs.h" 62#include "command.h" 63#include "mbuf.h" 64#include "log.h" 65#include "id.h" 66#include "timer.h" 67#include "fsm.h" 68#include "iplist.h" 69#include "lqr.h" 70#include "hdlc.h" 71#include "throughput.h" 72#include "slcompress.h" 73#include "ipcp.h" 74#include "filter.h" 75#include "descriptor.h" 76#include "route.h" 77#include "lcp.h" 78#include "ccp.h" 79#include "link.h" 80#include "mp.h" 81#ifndef NORADIUS 82#include "radius.h" 83#endif 84#include "bundle.h" 85#include "async.h" 86#include "physical.h" 87#include "auth.h" 88#include "proto.h" 89#include "chap.h" 90#include "tun.h" 91#include "prompt.h" 92#include "chat.h" 93#include "cbcp.h" 94#include "datalink.h" 95#include "ip.h" 96#include "iface.h" 97 98#define SCATTER_SEGMENTS 6 /* version, datalink, name, physical, 99 throughput, device */ 100 101#define SEND_MAXFD 3 /* Max file descriptors passed through 102 the local domain socket */ 103 104static int bundle_RemainingIdleTime(struct bundle *); 105 106static const char *PhaseNames[] = { 107 "Dead", "Establish", "Authenticate", "Network", "Terminate" 108}; 109 110const char * 111bundle_PhaseName(struct bundle *bundle) 112{ 113 return bundle->phase <= PHASE_TERMINATE ? 114 PhaseNames[bundle->phase] : "unknown"; 115} 116 117void 118bundle_NewPhase(struct bundle *bundle, u_int new) 119{ 120 if (new == bundle->phase) 121 return; 122 123 if (new <= PHASE_TERMINATE) 124 log_Printf(LogPHASE, "bundle: %s\n", PhaseNames[new]); 125 126 switch (new) { 127 case PHASE_DEAD: 128 log_DisplayPrompts(); 129 bundle->phase = new; 130 break; 131 132 case PHASE_ESTABLISH: 133 bundle->phase = new; 134 break; 135 136 case PHASE_AUTHENTICATE: 137 bundle->phase = new; 138 log_DisplayPrompts(); 139 break; 140 141 case PHASE_NETWORK: 142 fsm_Up(&bundle->ncp.ipcp.fsm); 143 fsm_Open(&bundle->ncp.ipcp.fsm); 144 bundle->phase = new; 145 log_DisplayPrompts(); 146 break; 147 148 case PHASE_TERMINATE: 149 bundle->phase = new; 150 mp_Down(&bundle->ncp.mp); 151 log_DisplayPrompts(); 152 break; 153 } 154} 155 156static void 157bundle_LayerStart(void *v, struct fsm *fp) 158{ 159 /* The given FSM is about to start up ! */ 160} 161 162 163static void 164bundle_Notify(struct bundle *bundle, char c) 165{ 166 if (bundle->notify.fd != -1) { 167 if (write(bundle->notify.fd, &c, 1) == 1) 168 log_Printf(LogPHASE, "Parent notified of success.\n"); 169 else 170 log_Printf(LogPHASE, "Failed to notify parent of success.\n"); 171 close(bundle->notify.fd); 172 bundle->notify.fd = -1; 173 } 174} 175 176static void 177bundle_ClearQueues(void *v) 178{ 179 struct bundle *bundle = (struct bundle *)v; 180 struct datalink *dl; 181 182 log_Printf(LogPHASE, "Clearing choked output queue\n"); 183 timer_Stop(&bundle->choked.timer); 184 185 /* 186 * Emergency time: 187 * 188 * We've had a full queue for PACKET_DEL_SECS seconds without being 189 * able to get rid of any of the packets. We've probably given up 190 * on the redials at this point, and the queued data has almost 191 * definitely been timed out by the layer above. As this is preventing 192 * us from reading the TUN_NAME device (we don't want to buffer stuff 193 * indefinitely), we may as well nuke this data and start with a clean 194 * slate ! 195 * 196 * Unfortunately, this has the side effect of shafting any compression 197 * dictionaries in use (causing the relevant RESET_REQ/RESET_ACK). 198 */ 199 200 ip_DeleteQueue(&bundle->ncp.ipcp); 201 mp_DeleteQueue(&bundle->ncp.mp); 202 for (dl = bundle->links; dl; dl = dl->next) 203 physical_DeleteQueue(dl->physical); 204} 205 206static void 207bundle_LinkAdded(struct bundle *bundle, struct datalink *dl) 208{ 209 bundle->phys_type.all |= dl->physical->type; 210 if (dl->state == DATALINK_OPEN) 211 bundle->phys_type.open |= dl->physical->type; 212 213 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 214 != bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED) 215 /* We may need to start our idle timer */ 216 bundle_StartIdleTimer(bundle); 217} 218 219void 220bundle_LinksRemoved(struct bundle *bundle) 221{ 222 struct datalink *dl; 223 224 bundle->phys_type.all = bundle->phys_type.open = 0; 225 for (dl = bundle->links; dl; dl = dl->next) 226 bundle_LinkAdded(bundle, dl); 227 228 bundle_CalculateBandwidth(bundle); 229 mp_CheckAutoloadTimer(&bundle->ncp.mp); 230 231 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 232 == bundle->phys_type.open) 233 bundle_StopIdleTimer(bundle); 234} 235 236static void 237bundle_LayerUp(void *v, struct fsm *fp) 238{ 239 /* 240 * The given fsm is now up 241 * If it's an LCP, adjust our phys_mode.open value and check the 242 * autoload timer. 243 * If it's the first NCP, calculate our bandwidth 244 * If it's the first NCP, set our ``upat'' time 245 * If it's the first NCP, start the idle timer. 246 * If it's an NCP, tell our -background parent to go away. 247 * If it's the first NCP, start the autoload timer 248 */ 249 struct bundle *bundle = (struct bundle *)v; 250 251 if (fp->proto == PROTO_LCP) { 252 struct physical *p = link2physical(fp->link); 253 254 bundle_LinkAdded(bundle, p->dl); 255 mp_CheckAutoloadTimer(&bundle->ncp.mp); 256 } else if (fp->proto == PROTO_IPCP) { 257 bundle_CalculateBandwidth(fp->bundle); 258 time(&bundle->upat); 259 bundle_StartIdleTimer(bundle); 260 bundle_Notify(bundle, EX_NORMAL); 261 mp_CheckAutoloadTimer(&fp->bundle->ncp.mp); 262 } 263} 264 265static void 266bundle_LayerDown(void *v, struct fsm *fp) 267{ 268 /* 269 * The given FSM has been told to come down. 270 * If it's our last NCP, stop the idle timer. 271 * If it's our last NCP, clear our ``upat'' value. 272 * If it's our last NCP, stop the autoload timer 273 * If it's an LCP, adjust our phys_type.open value and any timers. 274 * If it's an LCP and we're in multilink mode, adjust our tun 275 * speed and make sure our minimum sequence number is adjusted. 276 */ 277 278 struct bundle *bundle = (struct bundle *)v; 279 280 if (fp->proto == PROTO_IPCP) { 281 bundle_StopIdleTimer(bundle); 282 bundle->upat = 0; 283 mp_StopAutoloadTimer(&bundle->ncp.mp); 284 } else if (fp->proto == PROTO_LCP) { 285 bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */ 286 if (bundle->ncp.mp.active) { 287 struct datalink *dl; 288 struct datalink *lost; 289 290 lost = NULL; 291 for (dl = bundle->links; dl; dl = dl->next) 292 if (fp == &dl->physical->link.lcp.fsm) 293 lost = dl; 294 295 bundle_CalculateBandwidth(bundle); 296 297 if (lost) 298 mp_LinkLost(&bundle->ncp.mp, lost); 299 else 300 log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n", 301 fp->link->name); 302 } 303 } 304} 305 306static void 307bundle_LayerFinish(void *v, struct fsm *fp) 308{ 309 /* The given fsm is now down (fp cannot be NULL) 310 * 311 * If it's the last LCP, fsm_Down all NCPs 312 * If it's the last NCP, fsm_Close all LCPs 313 */ 314 315 struct bundle *bundle = (struct bundle *)v; 316 struct datalink *dl; 317 318 if (fp->proto == PROTO_IPCP) { 319 if (bundle_Phase(bundle) != PHASE_DEAD) 320 bundle_NewPhase(bundle, PHASE_TERMINATE); 321 for (dl = bundle->links; dl; dl = dl->next) 322 datalink_Close(dl, CLOSE_STAYDOWN); 323 fsm2initial(fp); 324 } else if (fp->proto == PROTO_LCP) { 325 int others_active; 326 327 others_active = 0; 328 for (dl = bundle->links; dl; dl = dl->next) 329 if (fp != &dl->physical->link.lcp.fsm && 330 dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 331 others_active++; 332 333 if (!others_active) 334 fsm2initial(&bundle->ncp.ipcp.fsm); 335 } 336} 337 338int 339bundle_LinkIsUp(const struct bundle *bundle) 340{ 341 return bundle->ncp.ipcp.fsm.state == ST_OPENED; 342} 343 344void 345bundle_Close(struct bundle *bundle, const char *name, int how) 346{ 347 /* 348 * Please close the given datalink. 349 * If name == NULL or name is the last datalink, fsm_Close all NCPs 350 * (except our MP) 351 * If it isn't the last datalink, just Close that datalink. 352 */ 353 354 struct datalink *dl, *this_dl; 355 int others_active; 356 357 others_active = 0; 358 this_dl = NULL; 359 360 for (dl = bundle->links; dl; dl = dl->next) { 361 if (name && !strcasecmp(name, dl->name)) 362 this_dl = dl; 363 if (name == NULL || this_dl == dl) { 364 switch (how) { 365 case CLOSE_LCP: 366 datalink_DontHangup(dl); 367 /* fall through */ 368 case CLOSE_STAYDOWN: 369 datalink_StayDown(dl); 370 break; 371 } 372 } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 373 others_active++; 374 } 375 376 if (name && this_dl == NULL) { 377 log_Printf(LogWARN, "%s: Invalid datalink name\n", name); 378 return; 379 } 380 381 if (!others_active) { 382 bundle_StopIdleTimer(bundle); 383 if (bundle->ncp.ipcp.fsm.state > ST_CLOSED || 384 bundle->ncp.ipcp.fsm.state == ST_STARTING) 385 fsm_Close(&bundle->ncp.ipcp.fsm); 386 else { 387 fsm2initial(&bundle->ncp.ipcp.fsm); 388 for (dl = bundle->links; dl; dl = dl->next) 389 datalink_Close(dl, how); 390 } 391 } else if (this_dl && this_dl->state != DATALINK_CLOSED && 392 this_dl->state != DATALINK_HANGUP) 393 datalink_Close(this_dl, how); 394} 395 396void 397bundle_Down(struct bundle *bundle, int how) 398{ 399 struct datalink *dl; 400 401 for (dl = bundle->links; dl; dl = dl->next) 402 datalink_Down(dl, how); 403} 404 405static size_t 406bundle_FillQueues(struct bundle *bundle) 407{ 408 size_t total; 409 410 if (bundle->ncp.mp.active) 411 total = mp_FillQueues(bundle); 412 else { 413 struct datalink *dl; 414 size_t add; 415 416 for (total = 0, dl = bundle->links; dl; dl = dl->next) 417 if (dl->state == DATALINK_OPEN) { 418 add = link_QueueLen(&dl->physical->link); 419 if (add == 0 && dl->physical->out == NULL) 420 add = ip_PushPacket(&dl->physical->link, bundle); 421 total += add; 422 } 423 } 424 425 return total + ip_QueueLen(&bundle->ncp.ipcp); 426} 427 428static int 429bundle_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 430{ 431 struct bundle *bundle = descriptor2bundle(d); 432 struct datalink *dl; 433 int result, nlinks; 434 size_t queued; 435 436 result = 0; 437 438 /* If there are aren't many packets queued, look for some more. */ 439 for (nlinks = 0, dl = bundle->links; dl; dl = dl->next) 440 nlinks++; 441 442 if (nlinks) { 443 queued = r ? bundle_FillQueues(bundle) : ip_QueueLen(&bundle->ncp.ipcp); 444 445 if (r && (bundle->phase == PHASE_NETWORK || 446 bundle->phys_type.all & PHYS_AUTO)) { 447 /* enough surplus so that we can tell if we're getting swamped */ 448 if (queued < 30) { 449 /* Not enough - select() for more */ 450 if (bundle->choked.timer.state == TIMER_RUNNING) 451 timer_Stop(&bundle->choked.timer); /* Not needed any more */ 452 FD_SET(bundle->dev.fd, r); 453 if (*n < bundle->dev.fd + 1) 454 *n = bundle->dev.fd + 1; 455 log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd); 456 result++; 457 } else if (bundle->choked.timer.state == TIMER_STOPPED) { 458 bundle->choked.timer.func = bundle_ClearQueues; 459 bundle->choked.timer.name = "output choke"; 460 bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS; 461 bundle->choked.timer.arg = bundle; 462 timer_Start(&bundle->choked.timer); 463 } 464 } 465 } 466 467#ifndef NORADIUS 468 result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n); 469#endif 470 471 /* Which links need a select() ? */ 472 for (dl = bundle->links; dl; dl = dl->next) 473 result += descriptor_UpdateSet(&dl->desc, r, w, e, n); 474 475 /* 476 * This *MUST* be called after the datalink UpdateSet()s as it 477 * might be ``holding'' one of the datalinks (death-row) and 478 * wants to be able to de-select() it from the descriptor set. 479 */ 480 result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n); 481 482 return result; 483} 484 485static int 486bundle_IsSet(struct descriptor *d, const fd_set *fdset) 487{ 488 struct bundle *bundle = descriptor2bundle(d); 489 struct datalink *dl; 490 491 for (dl = bundle->links; dl; dl = dl->next) 492 if (descriptor_IsSet(&dl->desc, fdset)) 493 return 1; 494 495#ifndef NORADIUS 496 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 497 return 1; 498#endif 499 500 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 501 return 1; 502 503 return FD_ISSET(bundle->dev.fd, fdset); 504} 505 506static void 507bundle_DescriptorRead(struct descriptor *d, struct bundle *bundle, 508 const fd_set *fdset) 509{ 510 struct datalink *dl; 511 512 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 513 descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset); 514 515 for (dl = bundle->links; dl; dl = dl->next) 516 if (descriptor_IsSet(&dl->desc, fdset)) 517 descriptor_Read(&dl->desc, bundle, fdset); 518 519#ifndef NORADIUS 520 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 521 descriptor_Read(&bundle->radius.desc, bundle, fdset); 522#endif 523 524 if (FD_ISSET(bundle->dev.fd, fdset)) { 525 struct tun_data tun; 526 int n, pri; 527 528 /* something to read from tun */ 529 n = read(bundle->dev.fd, &tun, sizeof tun); 530 if (n < 0) { 531 log_Printf(LogWARN, "read from %s: %s\n", TUN_NAME, strerror(errno)); 532 return; 533 } 534 n -= sizeof tun - sizeof tun.data; 535 if (n <= 0) { 536 log_Printf(LogERROR, "read from %s: Only %d bytes read ?\n", TUN_NAME, n); 537 return; 538 } 539 if (!tun_check_header(tun, AF_INET)) 540 return; 541 542 if (((struct ip *)tun.data)->ip_dst.s_addr == 543 bundle->ncp.ipcp.my_ip.s_addr) { 544 /* we've been asked to send something addressed *to* us :( */ 545 if (Enabled(bundle, OPT_LOOPBACK)) { 546 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.in); 547 if (pri >= 0) { 548 n += sizeof tun - sizeof tun.data; 549 write(bundle->dev.fd, &tun, n); 550 log_Printf(LogDEBUG, "Looped back packet addressed to myself\n"); 551 } 552 return; 553 } else 554 log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n"); 555 } 556 557 /* 558 * Process on-demand dialup. Output packets are queued within tunnel 559 * device until IPCP is opened. 560 */ 561 562 if (bundle_Phase(bundle) == PHASE_DEAD) { 563 /* 564 * Note, we must be in AUTO mode :-/ otherwise our interface should 565 * *not* be UP and we can't receive data 566 */ 567 if ((pri = PacketCheck(bundle, tun.data, n, &bundle->filter.dial)) >= 0) 568 bundle_Open(bundle, NULL, PHYS_AUTO, 0); 569 else 570 /* 571 * Drop the packet. If we were to queue it, we'd just end up with 572 * a pile of timed-out data in our output queue by the time we get 573 * around to actually dialing. We'd also prematurely reach the 574 * threshold at which we stop select()ing to read() the tun 575 * device - breaking auto-dial. 576 */ 577 return; 578 } 579 580 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.out); 581 if (pri >= 0) 582 ip_Enqueue(&bundle->ncp.ipcp, pri, tun.data, n); 583 } 584} 585 586static int 587bundle_DescriptorWrite(struct descriptor *d, struct bundle *bundle, 588 const fd_set *fdset) 589{ 590 struct datalink *dl; 591 int result = 0; 592 593 /* This is not actually necessary as struct mpserver doesn't Write() */ 594 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 595 descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset); 596 597 for (dl = bundle->links; dl; dl = dl->next) 598 if (descriptor_IsSet(&dl->desc, fdset)) 599 result += descriptor_Write(&dl->desc, bundle, fdset); 600 601 return result; 602} 603 604void 605bundle_LockTun(struct bundle *bundle) 606{ 607 FILE *lockfile; 608 char pidfile[MAXPATHLEN]; 609 610 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 611 lockfile = ID0fopen(pidfile, "w"); 612 if (lockfile != NULL) { 613 fprintf(lockfile, "%d\n", (int)getpid()); 614 fclose(lockfile); 615 } 616#ifndef RELEASE_CRUNCH 617 else 618 log_Printf(LogERROR, "Warning: Can't create %s: %s\n", 619 pidfile, strerror(errno)); 620#endif 621} 622 623static void 624bundle_UnlockTun(struct bundle *bundle) 625{ 626 char pidfile[MAXPATHLEN]; 627 628 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 629 ID0unlink(pidfile); 630} 631 632struct bundle * 633bundle_Create(const char *prefix, int type, int unit) 634{ 635 static struct bundle bundle; /* there can be only one */ 636 int enoentcount, err, minunit, maxunit; 637 const char *ifname; 638#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 639 int kldtried; 640#endif 641#if defined(TUNSIFMODE) || defined(TUNSLMODE) 642 int iff; 643#endif 644 645 if (bundle.iface != NULL) { /* Already allocated ! */ 646 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n"); 647 return NULL; 648 } 649 650 if (unit == -1) { 651 minunit = 0; 652 maxunit = -1; 653 } else { 654 minunit = unit; 655 maxunit = unit + 1; 656 } 657 err = ENOENT; 658 enoentcount = 0; 659#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 660 kldtried = 0; 661#endif 662 for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) { 663 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d", 664 prefix, bundle.unit); 665 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR); 666 if (bundle.dev.fd >= 0) 667 break; 668 else if (errno == ENXIO) { 669#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 670 if (bundle.unit == minunit && !kldtried++) { 671 /* 672 * Attempt to load the tunnel interface KLD if it isn't loaded 673 * already. 674 */ 675 if (modfind("if_tun") == -1) { 676 if (ID0kldload("if_tun") != -1) { 677 bundle.unit--; 678 continue; 679 } 680 log_Printf(LogWARN, "kldload: if_tun: %s\n", strerror(errno)); 681 } 682 } 683#endif 684 err = errno; 685 break; 686 } else if (errno == ENOENT) { 687 if (++enoentcount > 2) 688 break; 689 } else 690 err = errno; 691 } 692 693 if (bundle.dev.fd < 0) { 694 if (unit == -1) 695 log_Printf(LogWARN, "No available tunnel devices found (%s)\n", 696 strerror(err)); 697 else 698 log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err)); 699 return NULL; 700 } 701 702 log_SetTun(bundle.unit); 703 704 ifname = strrchr(bundle.dev.Name, '/'); 705 if (ifname == NULL) 706 ifname = bundle.dev.Name; 707 else 708 ifname++; 709 710 bundle.iface = iface_Create(ifname); 711 if (bundle.iface == NULL) { 712 close(bundle.dev.fd); 713 return NULL; 714 } 715 716#ifdef TUNSIFMODE 717 /* Make sure we're POINTOPOINT */ 718 iff = IFF_POINTOPOINT; 719 if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0) 720 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n", 721 strerror(errno)); 722#endif 723 724#ifdef TUNSLMODE 725 /* Make sure we're POINTOPOINT */ 726 iff = 0; 727 if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0) 728 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n", 729 strerror(errno)); 730#endif 731 732 if (!iface_SetFlags(bundle.iface, IFF_UP)) { 733 iface_Destroy(bundle.iface); 734 bundle.iface = NULL; 735 close(bundle.dev.fd); 736 return NULL; 737 } 738 739 log_Printf(LogPHASE, "Using interface: %s\n", ifname); 740 741 bundle.bandwidth = 0; 742 bundle.routing_seq = 0; 743 bundle.phase = PHASE_DEAD; 744 bundle.CleaningUp = 0; 745 bundle.NatEnabled = 0; 746 747 bundle.fsm.LayerStart = bundle_LayerStart; 748 bundle.fsm.LayerUp = bundle_LayerUp; 749 bundle.fsm.LayerDown = bundle_LayerDown; 750 bundle.fsm.LayerFinish = bundle_LayerFinish; 751 bundle.fsm.object = &bundle; 752 753 bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT; 754 bundle.cfg.idle.min_timeout = 0; 755 *bundle.cfg.auth.name = '\0'; 756 *bundle.cfg.auth.key = '\0'; 757 bundle.cfg.opt = OPT_SROUTES | OPT_IDCHECK | OPT_LOOPBACK | 758 OPT_THROUGHPUT | OPT_UTMP; 759 *bundle.cfg.label = '\0'; 760 bundle.cfg.mtu = DEF_MTU; 761 bundle.cfg.choked.timeout = CHOKED_TIMEOUT; 762 bundle.phys_type.all = type; 763 bundle.phys_type.open = 0; 764 bundle.upat = 0; 765 766 bundle.links = datalink_Create("deflink", &bundle, type); 767 if (bundle.links == NULL) { 768 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno)); 769 iface_Destroy(bundle.iface); 770 bundle.iface = NULL; 771 close(bundle.dev.fd); 772 return NULL; 773 } 774 775 bundle.desc.type = BUNDLE_DESCRIPTOR; 776 bundle.desc.UpdateSet = bundle_UpdateSet; 777 bundle.desc.IsSet = bundle_IsSet; 778 bundle.desc.Read = bundle_DescriptorRead; 779 bundle.desc.Write = bundle_DescriptorWrite; 780 781 mp_Init(&bundle.ncp.mp, &bundle); 782 783 /* Send over the first physical link by default */ 784 ipcp_Init(&bundle.ncp.ipcp, &bundle, &bundle.links->physical->link, 785 &bundle.fsm); 786 787 memset(&bundle.filter, '\0', sizeof bundle.filter); 788 bundle.filter.in.fragok = bundle.filter.in.logok = 1; 789 bundle.filter.in.name = "IN"; 790 bundle.filter.out.fragok = bundle.filter.out.logok = 1; 791 bundle.filter.out.name = "OUT"; 792 bundle.filter.dial.name = "DIAL"; 793 bundle.filter.dial.logok = 1; 794 bundle.filter.alive.name = "ALIVE"; 795 bundle.filter.alive.logok = 1; 796 { 797 int i; 798 for (i = 0; i < MAXFILTERS; i++) { 799 bundle.filter.in.rule[i].f_action = A_NONE; 800 bundle.filter.out.rule[i].f_action = A_NONE; 801 bundle.filter.dial.rule[i].f_action = A_NONE; 802 bundle.filter.alive.rule[i].f_action = A_NONE; 803 } 804 } 805 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer); 806 bundle.idle.done = 0; 807 bundle.notify.fd = -1; 808 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer); 809#ifndef NORADIUS 810 radius_Init(&bundle.radius); 811#endif 812 813 /* Clean out any leftover crud */ 814 iface_Clear(bundle.iface, IFACE_CLEAR_ALL); 815 816 bundle_LockTun(&bundle); 817 818 return &bundle; 819} 820 821static void 822bundle_DownInterface(struct bundle *bundle) 823{ 824 route_IfDelete(bundle, 1); 825 iface_ClearFlags(bundle->iface, IFF_UP); 826} 827 828void 829bundle_Destroy(struct bundle *bundle) 830{ 831 struct datalink *dl; 832 833 /* 834 * Clean up the interface. We don't need to timer_Stop()s, mp_Down(), 835 * ipcp_CleanInterface() and bundle_DownInterface() unless we're getting 836 * out under exceptional conditions such as a descriptor exception. 837 */ 838 timer_Stop(&bundle->idle.timer); 839 timer_Stop(&bundle->choked.timer); 840 mp_Down(&bundle->ncp.mp); 841 ipcp_CleanInterface(&bundle->ncp.ipcp); 842 bundle_DownInterface(bundle); 843 844#ifndef NORADIUS 845 /* Tell the radius server the bad news */ 846 radius_Destroy(&bundle->radius); 847#endif 848 849 /* Again, these are all DATALINK_CLOSED unless we're abending */ 850 dl = bundle->links; 851 while (dl) 852 dl = datalink_Destroy(dl); 853 854 ipcp_Destroy(&bundle->ncp.ipcp); 855 856 close(bundle->dev.fd); 857 bundle_UnlockTun(bundle); 858 859 /* In case we never made PHASE_NETWORK */ 860 bundle_Notify(bundle, EX_ERRDEAD); 861 862 iface_Destroy(bundle->iface); 863 bundle->iface = NULL; 864} 865 866struct rtmsg { 867 struct rt_msghdr m_rtm; 868 char m_space[64]; 869}; 870 871int 872bundle_SetRoute(struct bundle *bundle, int cmd, struct in_addr dst, 873 struct in_addr gateway, struct in_addr mask, int bang, int ssh) 874{ 875 struct rtmsg rtmes; 876 int s, nb, wb; 877 char *cp; 878 const char *cmdstr; 879 struct sockaddr_in rtdata; 880 int result = 1; 881 882 if (bang) 883 cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!"); 884 else 885 cmdstr = (cmd == RTM_ADD ? "Add" : "Delete"); 886 s = ID0socket(PF_ROUTE, SOCK_RAW, 0); 887 if (s < 0) { 888 log_Printf(LogERROR, "bundle_SetRoute: socket(): %s\n", strerror(errno)); 889 return result; 890 } 891 memset(&rtmes, '\0', sizeof rtmes); 892 rtmes.m_rtm.rtm_version = RTM_VERSION; 893 rtmes.m_rtm.rtm_type = cmd; 894 rtmes.m_rtm.rtm_addrs = RTA_DST; 895 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; 896 rtmes.m_rtm.rtm_pid = getpid(); 897 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 898 899 if (cmd == RTM_ADD || cmd == RTM_CHANGE) { 900 if (bundle->ncp.ipcp.cfg.sendpipe > 0) { 901 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.ipcp.cfg.sendpipe; 902 rtmes.m_rtm.rtm_inits |= RTV_SPIPE; 903 } 904 if (bundle->ncp.ipcp.cfg.recvpipe > 0) { 905 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.ipcp.cfg.recvpipe; 906 rtmes.m_rtm.rtm_inits |= RTV_RPIPE; 907 } 908 } 909 910 memset(&rtdata, '\0', sizeof rtdata); 911 rtdata.sin_len = sizeof rtdata; 912 rtdata.sin_family = AF_INET; 913 rtdata.sin_port = 0; 914 rtdata.sin_addr = dst; 915 916 cp = rtmes.m_space; 917 memcpy(cp, &rtdata, rtdata.sin_len); 918 cp += rtdata.sin_len; 919 if (cmd == RTM_ADD) { 920 if (gateway.s_addr == INADDR_ANY) { 921 if (!ssh) 922 log_Printf(LogERROR, "bundle_SetRoute: Cannot add a route with" 923 " destination 0.0.0.0\n"); 924 close(s); 925 return result; 926 } else { 927 rtdata.sin_addr = gateway; 928 memcpy(cp, &rtdata, rtdata.sin_len); 929 cp += rtdata.sin_len; 930 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; 931 } 932 } 933 934 if (dst.s_addr == INADDR_ANY) 935 mask.s_addr = INADDR_ANY; 936 937 if (cmd == RTM_ADD || dst.s_addr == INADDR_ANY) { 938 rtdata.sin_addr = mask; 939 memcpy(cp, &rtdata, rtdata.sin_len); 940 cp += rtdata.sin_len; 941 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; 942 } 943 944 nb = cp - (char *) &rtmes; 945 rtmes.m_rtm.rtm_msglen = nb; 946 wb = ID0write(s, &rtmes, nb); 947 if (wb < 0) { 948 log_Printf(LogTCPIP, "bundle_SetRoute failure:\n"); 949 log_Printf(LogTCPIP, "bundle_SetRoute: Cmd = %s\n", cmdstr); 950 log_Printf(LogTCPIP, "bundle_SetRoute: Dst = %s\n", inet_ntoa(dst)); 951 log_Printf(LogTCPIP, "bundle_SetRoute: Gateway = %s\n", 952 inet_ntoa(gateway)); 953 log_Printf(LogTCPIP, "bundle_SetRoute: Mask = %s\n", inet_ntoa(mask)); 954failed: 955 if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST || 956 (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) { 957 if (!bang) { 958 log_Printf(LogWARN, "Add route failed: %s already exists\n", 959 dst.s_addr == 0 ? "default" : inet_ntoa(dst)); 960 result = 0; /* Don't add to our dynamic list */ 961 } else { 962 rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE; 963 if ((wb = ID0write(s, &rtmes, nb)) < 0) 964 goto failed; 965 } 966 } else if (cmd == RTM_DELETE && 967 (rtmes.m_rtm.rtm_errno == ESRCH || 968 (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) { 969 if (!bang) 970 log_Printf(LogWARN, "Del route failed: %s: Non-existent\n", 971 inet_ntoa(dst)); 972 } else if (rtmes.m_rtm.rtm_errno == 0) { 973 if (!ssh || errno != ENETUNREACH) 974 log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr, 975 inet_ntoa(dst), strerror(errno)); 976 } else 977 log_Printf(LogWARN, "%s route failed: %s: %s\n", 978 cmdstr, inet_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno)); 979 } 980 log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %x, gateway = %x\n", 981 wb, cmdstr, (unsigned)dst.s_addr, (unsigned)gateway.s_addr); 982 close(s); 983 984 return result; 985} 986 987void 988bundle_LinkClosed(struct bundle *bundle, struct datalink *dl) 989{ 990 /* 991 * Our datalink has closed. 992 * CleanDatalinks() (called from DoLoop()) will remove closed 993 * BACKGROUND, FOREGROUND and DIRECT links. 994 * If it's the last data link, enter phase DEAD. 995 * 996 * NOTE: dl may not be in our list (bundle_SendDatalink()) ! 997 */ 998 999 struct datalink *odl; 1000 int other_links; 1001 1002 log_SetTtyCommandMode(dl); 1003 1004 other_links = 0; 1005 for (odl = bundle->links; odl; odl = odl->next) 1006 if (odl != dl && odl->state != DATALINK_CLOSED) 1007 other_links++; 1008 1009 if (!other_links) { 1010 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */ 1011 bundle_DownInterface(bundle); 1012 fsm2initial(&bundle->ncp.ipcp.fsm); 1013 bundle_NewPhase(bundle, PHASE_DEAD); 1014 bundle_StopIdleTimer(bundle); 1015 } 1016} 1017 1018void 1019bundle_Open(struct bundle *bundle, const char *name, int mask, int force) 1020{ 1021 /* 1022 * Please open the given datalink, or all if name == NULL 1023 */ 1024 struct datalink *dl; 1025 1026 for (dl = bundle->links; dl; dl = dl->next) 1027 if (name == NULL || !strcasecmp(dl->name, name)) { 1028 if ((mask & dl->physical->type) && 1029 (dl->state == DATALINK_CLOSED || 1030 (force && dl->state == DATALINK_OPENING && 1031 dl->dial.timer.state == TIMER_RUNNING))) { 1032 if (force) /* Ignore redial timeout ? */ 1033 timer_Stop(&dl->dial.timer); 1034 datalink_Up(dl, 1, 1); 1035 if (mask & PHYS_AUTO) 1036 /* Only one AUTO link at a time */ 1037 break; 1038 } 1039 if (name != NULL) 1040 break; 1041 } 1042} 1043 1044struct datalink * 1045bundle2datalink(struct bundle *bundle, const char *name) 1046{ 1047 struct datalink *dl; 1048 1049 if (name != NULL) { 1050 for (dl = bundle->links; dl; dl = dl->next) 1051 if (!strcasecmp(dl->name, name)) 1052 return dl; 1053 } else if (bundle->links && !bundle->links->next) 1054 return bundle->links; 1055 1056 return NULL; 1057} 1058 1059int 1060bundle_ShowLinks(struct cmdargs const *arg) 1061{ 1062 struct datalink *dl; 1063 struct pppThroughput *t; 1064 int secs; 1065 1066 for (dl = arg->bundle->links; dl; dl = dl->next) { 1067 prompt_Printf(arg->prompt, "Name: %s [%s, %s]", 1068 dl->name, mode2Nam(dl->physical->type), datalink_State(dl)); 1069 if (dl->physical->link.throughput.rolling && dl->state == DATALINK_OPEN) 1070 prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)", 1071 dl->mp.bandwidth ? dl->mp.bandwidth : 1072 physical_GetSpeed(dl->physical), 1073 dl->physical->link.throughput.OctetsPerSecond * 8, 1074 dl->physical->link.throughput.OctetsPerSecond); 1075 prompt_Printf(arg->prompt, "\n"); 1076 } 1077 1078 t = &arg->bundle->ncp.mp.link.throughput; 1079 secs = t->downtime ? 0 : throughput_uptime(t); 1080 if (secs > t->SamplePeriod) 1081 secs = t->SamplePeriod; 1082 if (secs) 1083 prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)" 1084 " over the last %d secs\n", t->OctetsPerSecond * 8, 1085 t->OctetsPerSecond, secs); 1086 1087 return 0; 1088} 1089 1090static const char * 1091optval(struct bundle *bundle, int bit) 1092{ 1093 return (bundle->cfg.opt & bit) ? "enabled" : "disabled"; 1094} 1095 1096int 1097bundle_ShowStatus(struct cmdargs const *arg) 1098{ 1099 int remaining; 1100 1101 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle)); 1102 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name); 1103 prompt_Printf(arg->prompt, " Interface: %s @ %lubps", 1104 arg->bundle->iface->name, arg->bundle->bandwidth); 1105 1106 if (arg->bundle->upat) { 1107 int secs = time(NULL) - arg->bundle->upat; 1108 1109 prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600, 1110 (secs / 60) % 60, secs % 60); 1111 } 1112 1113 prompt_Printf(arg->prompt, "\n\nDefaults:\n"); 1114 prompt_Printf(arg->prompt, " Label: %s\n", arg->bundle->cfg.label); 1115 prompt_Printf(arg->prompt, " Auth name: %s\n", 1116 arg->bundle->cfg.auth.name); 1117 1118 prompt_Printf(arg->prompt, " Choked Timer: %ds\n", 1119 arg->bundle->cfg.choked.timeout); 1120 1121#ifndef NORADIUS 1122 radius_Show(&arg->bundle->radius, arg->prompt); 1123#endif 1124 1125 prompt_Printf(arg->prompt, " Idle Timer: "); 1126 if (arg->bundle->cfg.idle.timeout) { 1127 prompt_Printf(arg->prompt, "%ds", arg->bundle->cfg.idle.timeout); 1128 if (arg->bundle->cfg.idle.min_timeout) 1129 prompt_Printf(arg->prompt, ", min %ds", 1130 arg->bundle->cfg.idle.min_timeout); 1131 remaining = bundle_RemainingIdleTime(arg->bundle); 1132 if (remaining != -1) 1133 prompt_Printf(arg->prompt, " (%ds remaining)", remaining); 1134 prompt_Printf(arg->prompt, "\n"); 1135 } else 1136 prompt_Printf(arg->prompt, "disabled\n"); 1137 prompt_Printf(arg->prompt, " MTU: "); 1138 if (arg->bundle->cfg.mtu) 1139 prompt_Printf(arg->prompt, "%d\n", arg->bundle->cfg.mtu); 1140 else 1141 prompt_Printf(arg->prompt, "unspecified\n"); 1142 1143 prompt_Printf(arg->prompt, " sendpipe: "); 1144 if (arg->bundle->ncp.ipcp.cfg.sendpipe > 0) 1145 prompt_Printf(arg->prompt, "%-20ld", arg->bundle->ncp.ipcp.cfg.sendpipe); 1146 else 1147 prompt_Printf(arg->prompt, "unspecified "); 1148 prompt_Printf(arg->prompt, " recvpipe: "); 1149 if (arg->bundle->ncp.ipcp.cfg.recvpipe > 0) 1150 prompt_Printf(arg->prompt, "%ld\n", arg->bundle->ncp.ipcp.cfg.recvpipe); 1151 else 1152 prompt_Printf(arg->prompt, "unspecified\n"); 1153 1154 prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s", 1155 optval(arg->bundle, OPT_SROUTES)); 1156 prompt_Printf(arg->prompt, " ID check: %s\n", 1157 optval(arg->bundle, OPT_IDCHECK)); 1158 prompt_Printf(arg->prompt, " Keep-Session: %-20.20s", 1159 optval(arg->bundle, OPT_KEEPSESSION)); 1160 prompt_Printf(arg->prompt, " Loopback: %s\n", 1161 optval(arg->bundle, OPT_LOOPBACK)); 1162 prompt_Printf(arg->prompt, " PasswdAuth: %-20.20s", 1163 optval(arg->bundle, OPT_PASSWDAUTH)); 1164 prompt_Printf(arg->prompt, " Proxy: %s\n", 1165 optval(arg->bundle, OPT_PROXY)); 1166 prompt_Printf(arg->prompt, " Proxyall: %-20.20s", 1167 optval(arg->bundle, OPT_PROXYALL)); 1168 prompt_Printf(arg->prompt, " Throughput: %s\n", 1169 optval(arg->bundle, OPT_THROUGHPUT)); 1170 prompt_Printf(arg->prompt, " Utmp Logging: %-20.20s", 1171 optval(arg->bundle, OPT_UTMP)); 1172 prompt_Printf(arg->prompt, " Iface-Alias: %s\n", 1173 optval(arg->bundle, OPT_IFACEALIAS)); 1174 1175 return 0; 1176} 1177 1178static void 1179bundle_IdleTimeout(void *v) 1180{ 1181 struct bundle *bundle = (struct bundle *)v; 1182 1183 log_Printf(LogPHASE, "Idle timer expired.\n"); 1184 bundle_StopIdleTimer(bundle); 1185 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1186} 1187 1188/* 1189 * Start Idle timer. If timeout is reached, we call bundle_Close() to 1190 * close LCP and link. 1191 */ 1192void 1193bundle_StartIdleTimer(struct bundle *bundle) 1194{ 1195 timer_Stop(&bundle->idle.timer); 1196 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1197 bundle->phys_type.open && bundle->cfg.idle.timeout) { 1198 int secs; 1199 1200 secs = bundle->cfg.idle.timeout; 1201 if (bundle->cfg.idle.min_timeout > secs && bundle->upat) { 1202 int up = time(NULL) - bundle->upat; 1203 1204 if ((long long)bundle->cfg.idle.min_timeout - up > (long long)secs) 1205 secs = bundle->cfg.idle.min_timeout - up; 1206 } 1207 bundle->idle.timer.func = bundle_IdleTimeout; 1208 bundle->idle.timer.name = "idle"; 1209 bundle->idle.timer.load = secs * SECTICKS; 1210 bundle->idle.timer.arg = bundle; 1211 timer_Start(&bundle->idle.timer); 1212 bundle->idle.done = time(NULL) + secs; 1213 } 1214} 1215 1216void 1217bundle_SetIdleTimer(struct bundle *bundle, int timeout, int min_timeout) 1218{ 1219 bundle->cfg.idle.timeout = timeout; 1220 if (min_timeout >= 0) 1221 bundle->cfg.idle.min_timeout = min_timeout; 1222 if (bundle_LinkIsUp(bundle)) 1223 bundle_StartIdleTimer(bundle); 1224} 1225 1226void 1227bundle_StopIdleTimer(struct bundle *bundle) 1228{ 1229 timer_Stop(&bundle->idle.timer); 1230 bundle->idle.done = 0; 1231} 1232 1233static int 1234bundle_RemainingIdleTime(struct bundle *bundle) 1235{ 1236 if (bundle->idle.done) 1237 return bundle->idle.done - time(NULL); 1238 return -1; 1239} 1240 1241int 1242bundle_IsDead(struct bundle *bundle) 1243{ 1244 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp); 1245} 1246 1247static struct datalink * 1248bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl) 1249{ 1250 struct datalink **dlp; 1251 1252 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next) 1253 if (*dlp == dl) { 1254 *dlp = dl->next; 1255 dl->next = NULL; 1256 bundle_LinksRemoved(bundle); 1257 return dl; 1258 } 1259 1260 return NULL; 1261} 1262 1263static void 1264bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl) 1265{ 1266 struct datalink **dlp = &bundle->links; 1267 1268 while (*dlp) 1269 dlp = &(*dlp)->next; 1270 1271 *dlp = dl; 1272 dl->next = NULL; 1273 1274 bundle_LinkAdded(bundle, dl); 1275 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1276} 1277 1278void 1279bundle_CleanDatalinks(struct bundle *bundle) 1280{ 1281 struct datalink **dlp = &bundle->links; 1282 int found = 0; 1283 1284 while (*dlp) 1285 if ((*dlp)->state == DATALINK_CLOSED && 1286 (*dlp)->physical->type & 1287 (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) { 1288 *dlp = datalink_Destroy(*dlp); 1289 found++; 1290 } else 1291 dlp = &(*dlp)->next; 1292 1293 if (found) 1294 bundle_LinksRemoved(bundle); 1295} 1296 1297int 1298bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl, 1299 const char *name) 1300{ 1301 if (bundle2datalink(bundle, name)) { 1302 log_Printf(LogWARN, "Clone: %s: name already exists\n", name); 1303 return 0; 1304 } 1305 1306 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name)); 1307 return 1; 1308} 1309 1310void 1311bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl) 1312{ 1313 dl = bundle_DatalinkLinkout(bundle, dl); 1314 if (dl) 1315 datalink_Destroy(dl); 1316} 1317 1318void 1319bundle_SetLabel(struct bundle *bundle, const char *label) 1320{ 1321 if (label) 1322 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1); 1323 else 1324 *bundle->cfg.label = '\0'; 1325} 1326 1327const char * 1328bundle_GetLabel(struct bundle *bundle) 1329{ 1330 return *bundle->cfg.label ? bundle->cfg.label : NULL; 1331} 1332 1333int 1334bundle_LinkSize() 1335{ 1336 struct iovec iov[SCATTER_SEGMENTS]; 1337 int niov, expect, f; 1338 1339 iov[0].iov_len = strlen(Version) + 1; 1340 iov[0].iov_base = NULL; 1341 niov = 1; 1342 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1343 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1344 return 0; 1345 } 1346 1347 for (f = expect = 0; f < niov; f++) 1348 expect += iov[f].iov_len; 1349 1350 return expect; 1351} 1352 1353void 1354bundle_ReceiveDatalink(struct bundle *bundle, int s) 1355{ 1356 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1357 int niov, expect, f, *fd, nfd, onfd, got; 1358 struct iovec iov[SCATTER_SEGMENTS]; 1359 struct cmsghdr *cmsg; 1360 struct msghdr msg; 1361 struct datalink *dl; 1362 pid_t pid; 1363 1364 log_Printf(LogPHASE, "Receiving datalink\n"); 1365 1366 /* 1367 * Create our scatter/gather array - passing NULL gets the space 1368 * allocation requirement rather than actually flattening the 1369 * structures. 1370 */ 1371 iov[0].iov_len = strlen(Version) + 1; 1372 iov[0].iov_base = NULL; 1373 niov = 1; 1374 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1375 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1376 return; 1377 } 1378 1379 /* Allocate the scatter/gather array for recvmsg() */ 1380 for (f = expect = 0; f < niov; f++) { 1381 if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) { 1382 log_Printf(LogERROR, "Cannot allocate space to receive link\n"); 1383 return; 1384 } 1385 if (f) 1386 expect += iov[f].iov_len; 1387 } 1388 1389 /* Set up our message */ 1390 cmsg = (struct cmsghdr *)cmsgbuf; 1391 cmsg->cmsg_len = sizeof cmsgbuf; 1392 cmsg->cmsg_level = SOL_SOCKET; 1393 cmsg->cmsg_type = 0; 1394 1395 memset(&msg, '\0', sizeof msg); 1396 msg.msg_name = NULL; 1397 msg.msg_namelen = 0; 1398 msg.msg_iov = iov; 1399 msg.msg_iovlen = 1; /* Only send the version at the first pass */ 1400 msg.msg_control = cmsgbuf; 1401 msg.msg_controllen = sizeof cmsgbuf; 1402 1403 log_Printf(LogDEBUG, "Expecting %d scatter/gather bytes\n", iov[0].iov_len); 1404 1405 if ((got = recvmsg(s, &msg, MSG_WAITALL)) != iov[0].iov_len) { 1406 if (got == -1) 1407 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); 1408 else 1409 log_Printf(LogERROR, "Failed recvmsg: Got %d, not %d\n", 1410 got, iov[0].iov_len); 1411 while (niov--) 1412 free(iov[niov].iov_base); 1413 return; 1414 } 1415 1416 if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { 1417 log_Printf(LogERROR, "Recvmsg: no descriptors received !\n"); 1418 while (niov--) 1419 free(iov[niov].iov_base); 1420 return; 1421 } 1422 1423 fd = (int *)(cmsg + 1); 1424 nfd = (cmsg->cmsg_len - sizeof *cmsg) / sizeof(int); 1425 1426 if (nfd < 2) { 1427 log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n", 1428 nfd, nfd == 1 ? "" : "s"); 1429 while (nfd--) 1430 close(fd[nfd]); 1431 while (niov--) 1432 free(iov[niov].iov_base); 1433 return; 1434 } 1435 1436 /* 1437 * We've successfully received two or more open file descriptors 1438 * through our socket, plus a version string. Make sure it's the 1439 * correct version, and drop the connection if it's not. 1440 */ 1441 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) { 1442 log_Printf(LogWARN, "Cannot receive datalink, incorrect version" 1443 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len, 1444 (char *)iov[0].iov_base, Version); 1445 while (nfd--) 1446 close(fd[nfd]); 1447 while (niov--) 1448 free(iov[niov].iov_base); 1449 return; 1450 } 1451 1452 /* 1453 * Everything looks good. Send the other side our process id so that 1454 * they can transfer lock ownership, and wait for them to send the 1455 * actual link data. 1456 */ 1457 pid = getpid(); 1458 if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) { 1459 if (got == -1) 1460 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1461 else 1462 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, 1463 (int)(sizeof pid)); 1464 while (nfd--) 1465 close(fd[nfd]); 1466 while (niov--) 1467 free(iov[niov].iov_base); 1468 return; 1469 } 1470 1471 if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) { 1472 if (got == -1) 1473 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1474 else 1475 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, expect); 1476 while (nfd--) 1477 close(fd[nfd]); 1478 while (niov--) 1479 free(iov[niov].iov_base); 1480 return; 1481 } 1482 close(fd[1]); 1483 1484 onfd = nfd; /* We've got this many in our array */ 1485 nfd -= 2; /* Don't include p->fd and our reply descriptor */ 1486 niov = 1; /* Skip the version id */ 1487 dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, fd[0], 1488 fd + 2, &nfd); 1489 if (dl) { 1490 1491 if (nfd) { 1492 log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d " 1493 "auxiliary file descriptors (%d remain)\n", onfd, nfd); 1494 datalink_Destroy(dl); 1495 while (nfd--) 1496 close(fd[onfd--]); 1497 close(fd[0]); 1498 } else { 1499 bundle_DatalinkLinkin(bundle, dl); 1500 datalink_AuthOk(dl); 1501 bundle_CalculateBandwidth(dl->bundle); 1502 } 1503 } else { 1504 while (nfd--) 1505 close(fd[onfd--]); 1506 close(fd[0]); 1507 close(fd[1]); 1508 } 1509 1510 free(iov[0].iov_base); 1511} 1512 1513void 1514bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun) 1515{ 1516 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1517 const char *constlock; 1518 char *lock; 1519 struct cmsghdr *cmsg; 1520 struct msghdr msg; 1521 struct iovec iov[SCATTER_SEGMENTS]; 1522 int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2], got; 1523 pid_t newpid; 1524 1525 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name); 1526 1527 /* Record the base device name for a lock transfer later */ 1528 constlock = physical_LockedDevice(dl->physical); 1529 if (constlock) { 1530 lock = alloca(strlen(constlock) + 1); 1531 strcpy(lock, constlock); 1532 } else 1533 lock = NULL; 1534 1535 bundle_LinkClosed(dl->bundle, dl); 1536 bundle_DatalinkLinkout(dl->bundle, dl); 1537 1538 /* Build our scatter/gather array */ 1539 iov[0].iov_len = strlen(Version) + 1; 1540 iov[0].iov_base = strdup(Version); 1541 niov = 1; 1542 nfd = 0; 1543 1544 fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd); 1545 1546 if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) { 1547 /* 1548 * fd[1] is used to get the peer process id back, then to confirm that 1549 * we've transferred any device locks to that process id. 1550 */ 1551 fd[1] = reply[1]; 1552 1553 nfd += 2; /* Include fd[0] and fd[1] */ 1554 memset(&msg, '\0', sizeof msg); 1555 1556 msg.msg_name = NULL; 1557 msg.msg_namelen = 0; 1558 /* 1559 * Only send the version to start... We used to send the whole lot, but 1560 * this caused problems with our RECVBUF size as a single link is about 1561 * 22k ! This way, we should bump into no limits. 1562 */ 1563 msg.msg_iovlen = 1; 1564 msg.msg_iov = iov; 1565 msg.msg_control = cmsgbuf; 1566 msg.msg_controllen = sizeof *cmsg + sizeof(int) * nfd; 1567 msg.msg_flags = 0; 1568 1569 cmsg = (struct cmsghdr *)cmsgbuf; 1570 cmsg->cmsg_len = msg.msg_controllen; 1571 cmsg->cmsg_level = SOL_SOCKET; 1572 cmsg->cmsg_type = SCM_RIGHTS; 1573 1574 for (f = 0; f < nfd; f++) 1575 *((int *)(cmsg + 1) + f) = fd[f]; 1576 1577 for (f = 1, expect = 0; f < niov; f++) 1578 expect += iov[f].iov_len; 1579 1580 if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1) 1581 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1582 strerror(errno)); 1583 if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1) 1584 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1585 strerror(errno)); 1586 1587 log_Printf(LogDEBUG, "Sending %d descriptor%s and %d bytes in scatter" 1588 "/gather array\n", nfd, nfd == 1 ? "" : "s", iov[0].iov_len); 1589 1590 if ((got = sendmsg(s, &msg, 0)) == -1) 1591 log_Printf(LogERROR, "Failed sendmsg: %s: %s\n", 1592 sun->sun_path, strerror(errno)); 1593 else if (got != iov[0].iov_len) 1594 log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %d of %d\n", 1595 sun->sun_path, got, iov[0].iov_len); 1596 else { 1597 /* We must get the ACK before closing the descriptor ! */ 1598 int res; 1599 1600 if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) { 1601 log_Printf(LogDEBUG, "Received confirmation from pid %d\n", 1602 (int)newpid); 1603 if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK) 1604 log_Printf(LogPHASE, "uu_lock_txfr: %s\n", uu_lockerr(res)); 1605 1606 log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect); 1607 if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) { 1608 if (got == -1) 1609 log_Printf(LogERROR, "%s: Failed writev: %s\n", 1610 sun->sun_path, strerror(errno)); 1611 else 1612 log_Printf(LogERROR, "%s: Failed writev: Wrote %d of %d\n", 1613 sun->sun_path, got, expect); 1614 } 1615 } else if (got == -1) 1616 log_Printf(LogERROR, "%s: Failed socketpair read: %s\n", 1617 sun->sun_path, strerror(errno)); 1618 else 1619 log_Printf(LogERROR, "%s: Failed socketpair read: Got %d of %d\n", 1620 sun->sun_path, got, (int)(sizeof newpid)); 1621 } 1622 1623 close(reply[0]); 1624 close(reply[1]); 1625 1626 newsid = Enabled(dl->bundle, OPT_KEEPSESSION) || 1627 tcgetpgrp(fd[0]) == getpgrp(); 1628 while (nfd) 1629 close(fd[--nfd]); 1630 if (newsid) 1631 bundle_setsid(dl->bundle, got != -1); 1632 } 1633 close(s); 1634 1635 while (niov--) 1636 free(iov[niov].iov_base); 1637} 1638 1639int 1640bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl, 1641 const char *name) 1642{ 1643 struct datalink *dl; 1644 1645 if (!strcasecmp(ndl->name, name)) 1646 return 1; 1647 1648 for (dl = bundle->links; dl; dl = dl->next) 1649 if (!strcasecmp(dl->name, name)) 1650 return 0; 1651 1652 datalink_Rename(ndl, name); 1653 return 1; 1654} 1655 1656int 1657bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode) 1658{ 1659 int omode; 1660 1661 omode = dl->physical->type; 1662 if (omode == mode) 1663 return 1; 1664 1665 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO)) 1666 /* First auto link */ 1667 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) { 1668 log_Printf(LogWARN, "You must `set ifaddr' or `open' before" 1669 " changing mode to %s\n", mode2Nam(mode)); 1670 return 0; 1671 } 1672 1673 if (!datalink_SetMode(dl, mode)) 1674 return 0; 1675 1676 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) && 1677 bundle->phase != PHASE_NETWORK) 1678 /* First auto link, we need an interface */ 1679 ipcp_InterfaceUp(&bundle->ncp.ipcp); 1680 1681 /* Regenerate phys_type and adjust idle timer */ 1682 bundle_LinksRemoved(bundle); 1683 1684 return 1; 1685} 1686 1687void 1688bundle_setsid(struct bundle *bundle, int holdsession) 1689{ 1690 /* 1691 * Lose the current session. This means getting rid of our pid 1692 * too so that the tty device will really go away, and any getty 1693 * etc will be allowed to restart. 1694 */ 1695 pid_t pid, orig; 1696 int fds[2]; 1697 char done; 1698 struct datalink *dl; 1699 1700 if (!holdsession && bundle_IsDead(bundle)) { 1701 /* 1702 * No need to lose our session after all... we're going away anyway 1703 * 1704 * We should really stop the timer and pause if holdsession is set and 1705 * the bundle's dead, but that leaves other resources lying about :-( 1706 */ 1707 return; 1708 } 1709 1710 orig = getpid(); 1711 if (pipe(fds) == -1) { 1712 log_Printf(LogERROR, "pipe: %s\n", strerror(errno)); 1713 return; 1714 } 1715 switch ((pid = fork())) { 1716 case -1: 1717 log_Printf(LogERROR, "fork: %s\n", strerror(errno)); 1718 close(fds[0]); 1719 close(fds[1]); 1720 return; 1721 case 0: 1722 close(fds[1]); 1723 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1724 close(fds[0]); 1725 if (pipe(fds) == -1) { 1726 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno)); 1727 return; 1728 } 1729 switch ((pid = fork())) { 1730 case -1: 1731 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno)); 1732 close(fds[0]); 1733 close(fds[1]); 1734 return; 1735 case 0: 1736 close(fds[1]); 1737 bundle_LockTun(bundle); /* update pid */ 1738 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1739 close(fds[0]); 1740 setsid(); 1741 log_Printf(LogPHASE, "%d -> %d: %s session control\n", 1742 (int)orig, (int)getpid(), 1743 holdsession ? "Passed" : "Dropped"); 1744 timer_InitService(0); /* Start the Timer Service */ 1745 break; 1746 default: 1747 close(fds[0]); 1748 /* Give away all our physical locks (to the final process) */ 1749 for (dl = bundle->links; dl; dl = dl->next) 1750 if (dl->state != DATALINK_CLOSED) 1751 physical_ChangedPid(dl->physical, pid); 1752 write(fds[1], "!", 1); /* done */ 1753 close(fds[1]); 1754 _exit(0); 1755 break; 1756 } 1757 break; 1758 default: 1759 close(fds[0]); 1760 /* Give away all our physical locks (to the intermediate process) */ 1761 for (dl = bundle->links; dl; dl = dl->next) 1762 if (dl->state != DATALINK_CLOSED) 1763 physical_ChangedPid(dl->physical, pid); 1764 write(fds[1], "!", 1); /* done */ 1765 close(fds[1]); 1766 if (holdsession) { 1767 int fd, status; 1768 1769 timer_TermService(); 1770 signal(SIGPIPE, SIG_DFL); 1771 signal(SIGALRM, SIG_DFL); 1772 signal(SIGHUP, SIG_DFL); 1773 signal(SIGTERM, SIG_DFL); 1774 signal(SIGINT, SIG_DFL); 1775 signal(SIGQUIT, SIG_DFL); 1776 for (fd = getdtablesize(); fd >= 0; fd--) 1777 close(fd); 1778 /* 1779 * Reap the intermediate process. As we're not exiting but the 1780 * intermediate is, we don't want it to become defunct. 1781 */ 1782 waitpid(pid, &status, 0); 1783 /* Tweak our process arguments.... */ 1784 ID0setproctitle("session owner"); 1785 setuid(geteuid()); 1786 /* 1787 * Hang around for a HUP. This should happen as soon as the 1788 * ppp that we passed our ctty descriptor to closes it. 1789 * NOTE: If this process dies, the passed descriptor becomes 1790 * invalid and will give a select() error by setting one 1791 * of the error fds, aborting the other ppp. We don't 1792 * want that to happen ! 1793 */ 1794 pause(); 1795 } 1796 _exit(0); 1797 break; 1798 } 1799} 1800 1801int 1802bundle_HighestState(struct bundle *bundle) 1803{ 1804 struct datalink *dl; 1805 int result = DATALINK_CLOSED; 1806 1807 for (dl = bundle->links; dl; dl = dl->next) 1808 if (result < dl->state) 1809 result = dl->state; 1810 1811 return result; 1812} 1813 1814int 1815bundle_Exception(struct bundle *bundle, int fd) 1816{ 1817 struct datalink *dl; 1818 1819 for (dl = bundle->links; dl; dl = dl->next) 1820 if (dl->physical->fd == fd) { 1821 datalink_Down(dl, CLOSE_NORMAL); 1822 return 1; 1823 } 1824 1825 return 0; 1826} 1827 1828void 1829bundle_AdjustFilters(struct bundle *bundle, struct in_addr *my_ip, 1830 struct in_addr *peer_ip) 1831{ 1832 filter_AdjustAddr(&bundle->filter.in, my_ip, peer_ip); 1833 filter_AdjustAddr(&bundle->filter.out, my_ip, peer_ip); 1834 filter_AdjustAddr(&bundle->filter.dial, my_ip, peer_ip); 1835 filter_AdjustAddr(&bundle->filter.alive, my_ip, peer_ip); 1836} 1837 1838void 1839bundle_CalculateBandwidth(struct bundle *bundle) 1840{ 1841 struct datalink *dl; 1842 int mtu, sp; 1843 1844 bundle->bandwidth = 0; 1845 mtu = 0; 1846 for (dl = bundle->links; dl; dl = dl->next) 1847 if (dl->state == DATALINK_OPEN) { 1848 if ((sp = dl->mp.bandwidth) == 0 && 1849 (sp = physical_GetSpeed(dl->physical)) == 0) 1850 log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n", 1851 dl->name, dl->physical->name.full); 1852 else 1853 bundle->bandwidth += sp; 1854 if (!bundle->ncp.mp.active) { 1855 mtu = dl->physical->link.lcp.his_mru; 1856 break; 1857 } 1858 } 1859 1860 if(bundle->bandwidth == 0) 1861 bundle->bandwidth = 115200; /* Shrug */ 1862 1863 if (bundle->ncp.mp.active) 1864 mtu = bundle->ncp.mp.peer_mrru; 1865 else if (!mtu) 1866 mtu = 1500; 1867 1868#ifndef NORADIUS 1869 if (bundle->radius.valid && bundle->radius.mtu && bundle->radius.mtu < mtu) { 1870 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n", 1871 bundle->radius.mtu); 1872 mtu = bundle->radius.mtu; 1873 } 1874#endif 1875 1876 tun_configure(bundle, mtu); 1877} 1878 1879void 1880bundle_AutoAdjust(struct bundle *bundle, int percent, int what) 1881{ 1882 struct datalink *dl, *choice, *otherlinkup; 1883 1884 choice = otherlinkup = NULL; 1885 for (dl = bundle->links; dl; dl = dl->next) 1886 if (dl->physical->type == PHYS_AUTO) { 1887 if (dl->state == DATALINK_OPEN) { 1888 if (what == AUTO_DOWN) { 1889 if (choice) 1890 otherlinkup = choice; 1891 choice = dl; 1892 } 1893 } else if (dl->state == DATALINK_CLOSED) { 1894 if (what == AUTO_UP) { 1895 choice = dl; 1896 break; 1897 } 1898 } else { 1899 /* An auto link in an intermediate state - forget it for the moment */ 1900 choice = NULL; 1901 break; 1902 } 1903 } else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN) 1904 otherlinkup = dl; 1905 1906 if (choice) { 1907 if (what == AUTO_UP) { 1908 log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n", 1909 percent, choice->name); 1910 datalink_Up(choice, 1, 1); 1911 mp_StopAutoloadTimer(&bundle->ncp.mp); 1912 } else if (otherlinkup) { /* Only bring the second-last link down */ 1913 log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n", 1914 percent, choice->name); 1915 datalink_Close(choice, CLOSE_STAYDOWN); 1916 mp_StopAutoloadTimer(&bundle->ncp.mp); 1917 } 1918 } 1919} 1920 1921int 1922bundle_WantAutoloadTimer(struct bundle *bundle) 1923{ 1924 struct datalink *dl; 1925 int autolink, opened; 1926 1927 if (bundle->phase == PHASE_NETWORK) { 1928 for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next) 1929 if (dl->physical->type == PHYS_AUTO) { 1930 if (++autolink == 2 || (autolink == 1 && opened)) 1931 /* Two auto links or one auto and one open in NETWORK phase */ 1932 return 1; 1933 } else if (dl->state == DATALINK_OPEN) { 1934 opened++; 1935 if (autolink) 1936 /* One auto and one open link in NETWORK phase */ 1937 return 1; 1938 } 1939 } 1940 1941 return 0; 1942} 1943