bundle.c revision 58456
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 58456 2000-03-22 03:02:00Z 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 TUNS* ioctls */ 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 * const 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 NCP, fsm_Close all LCPs 312 */ 313 314 struct bundle *bundle = (struct bundle *)v; 315 struct datalink *dl; 316 317 if (fp->proto == PROTO_IPCP) { 318 if (bundle_Phase(bundle) != PHASE_DEAD) 319 bundle_NewPhase(bundle, PHASE_TERMINATE); 320 for (dl = bundle->links; dl; dl = dl->next) 321 datalink_Close(dl, CLOSE_STAYDOWN); 322 fsm2initial(fp); 323 } 324 /* 325 * If it's an LCP, don't try to murder any NCPs, let bundle_LinkClosed() 326 * do that side of things (at a time when a call to fsm2initial() on the 327 * NCP isn't going to take charge of bringing down this link). 328 */ 329} 330 331int 332bundle_LinkIsUp(const struct bundle *bundle) 333{ 334 return bundle->ncp.ipcp.fsm.state == ST_OPENED; 335} 336 337void 338bundle_Close(struct bundle *bundle, const char *name, int how) 339{ 340 /* 341 * Please close the given datalink. 342 * If name == NULL or name is the last datalink, fsm_Close all NCPs 343 * (except our MP) 344 * If it isn't the last datalink, just Close that datalink. 345 */ 346 347 struct datalink *dl, *this_dl; 348 int others_active; 349 350 others_active = 0; 351 this_dl = NULL; 352 353 for (dl = bundle->links; dl; dl = dl->next) { 354 if (name && !strcasecmp(name, dl->name)) 355 this_dl = dl; 356 if (name == NULL || this_dl == dl) { 357 switch (how) { 358 case CLOSE_LCP: 359 datalink_DontHangup(dl); 360 /* fall through */ 361 case CLOSE_STAYDOWN: 362 datalink_StayDown(dl); 363 break; 364 } 365 } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 366 others_active++; 367 } 368 369 if (name && this_dl == NULL) { 370 log_Printf(LogWARN, "%s: Invalid datalink name\n", name); 371 return; 372 } 373 374 if (!others_active) { 375 bundle_StopIdleTimer(bundle); 376 if (bundle->ncp.ipcp.fsm.state > ST_CLOSED || 377 bundle->ncp.ipcp.fsm.state == ST_STARTING) 378 fsm_Close(&bundle->ncp.ipcp.fsm); 379 else { 380 fsm2initial(&bundle->ncp.ipcp.fsm); 381 for (dl = bundle->links; dl; dl = dl->next) 382 datalink_Close(dl, how); 383 } 384 } else if (this_dl && this_dl->state != DATALINK_CLOSED && 385 this_dl->state != DATALINK_HANGUP) 386 datalink_Close(this_dl, how); 387} 388 389void 390bundle_Down(struct bundle *bundle, int how) 391{ 392 struct datalink *dl; 393 394 for (dl = bundle->links; dl; dl = dl->next) 395 datalink_Down(dl, how); 396} 397 398static size_t 399bundle_FillQueues(struct bundle *bundle) 400{ 401 size_t total; 402 403 if (bundle->ncp.mp.active) 404 total = mp_FillQueues(bundle); 405 else { 406 struct datalink *dl; 407 size_t add; 408 409 for (total = 0, dl = bundle->links; dl; dl = dl->next) 410 if (dl->state == DATALINK_OPEN) { 411 add = link_QueueLen(&dl->physical->link); 412 if (add == 0 && dl->physical->out == NULL) 413 add = ip_PushPacket(&dl->physical->link, bundle); 414 total += add; 415 } 416 } 417 418 return total + ip_QueueLen(&bundle->ncp.ipcp); 419} 420 421static int 422bundle_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 423{ 424 struct bundle *bundle = descriptor2bundle(d); 425 struct datalink *dl; 426 int result, nlinks; 427 size_t queued; 428 429 result = 0; 430 431 /* If there are aren't many packets queued, look for some more. */ 432 for (nlinks = 0, dl = bundle->links; dl; dl = dl->next) 433 nlinks++; 434 435 if (nlinks) { 436 queued = r ? bundle_FillQueues(bundle) : ip_QueueLen(&bundle->ncp.ipcp); 437 438 if (r && (bundle->phase == PHASE_NETWORK || 439 bundle->phys_type.all & PHYS_AUTO)) { 440 /* enough surplus so that we can tell if we're getting swamped */ 441 if (queued < 30) { 442 /* Not enough - select() for more */ 443 if (bundle->choked.timer.state == TIMER_RUNNING) 444 timer_Stop(&bundle->choked.timer); /* Not needed any more */ 445 FD_SET(bundle->dev.fd, r); 446 if (*n < bundle->dev.fd + 1) 447 *n = bundle->dev.fd + 1; 448 log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd); 449 result++; 450 } else if (bundle->choked.timer.state == TIMER_STOPPED) { 451 bundle->choked.timer.func = bundle_ClearQueues; 452 bundle->choked.timer.name = "output choke"; 453 bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS; 454 bundle->choked.timer.arg = bundle; 455 timer_Start(&bundle->choked.timer); 456 } 457 } 458 } 459 460#ifndef NORADIUS 461 result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n); 462#endif 463 464 /* Which links need a select() ? */ 465 for (dl = bundle->links; dl; dl = dl->next) 466 result += descriptor_UpdateSet(&dl->desc, r, w, e, n); 467 468 /* 469 * This *MUST* be called after the datalink UpdateSet()s as it 470 * might be ``holding'' one of the datalinks (death-row) and 471 * wants to be able to de-select() it from the descriptor set. 472 */ 473 result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n); 474 475 return result; 476} 477 478static int 479bundle_IsSet(struct fdescriptor *d, const fd_set *fdset) 480{ 481 struct bundle *bundle = descriptor2bundle(d); 482 struct datalink *dl; 483 484 for (dl = bundle->links; dl; dl = dl->next) 485 if (descriptor_IsSet(&dl->desc, fdset)) 486 return 1; 487 488#ifndef NORADIUS 489 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 490 return 1; 491#endif 492 493 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 494 return 1; 495 496 return FD_ISSET(bundle->dev.fd, fdset); 497} 498 499static void 500bundle_DescriptorRead(struct fdescriptor *d, struct bundle *bundle, 501 const fd_set *fdset) 502{ 503 struct datalink *dl; 504 505 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 506 descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset); 507 508 for (dl = bundle->links; dl; dl = dl->next) 509 if (descriptor_IsSet(&dl->desc, fdset)) 510 descriptor_Read(&dl->desc, bundle, fdset); 511 512#ifndef NORADIUS 513 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 514 descriptor_Read(&bundle->radius.desc, bundle, fdset); 515#endif 516 517 if (FD_ISSET(bundle->dev.fd, fdset)) { 518 struct tun_data tun; 519 int n, pri; 520 char *data; 521 size_t sz; 522 523 if (bundle->dev.header) { 524 data = (char *)&tun; 525 sz = sizeof tun; 526 } else { 527 data = tun.data; 528 sz = sizeof tun.data; 529 } 530 531 /* something to read from tun */ 532 533 n = read(bundle->dev.fd, data, sz); 534 if (n < 0) { 535 log_Printf(LogWARN, "%s: read: %s\n", bundle->dev.Name, strerror(errno)); 536 return; 537 } 538 539 if (bundle->dev.header) { 540 n -= sz - sizeof tun.data; 541 if (n <= 0) { 542 log_Printf(LogERROR, "%s: read: Got only %d bytes of data !\n", 543 bundle->dev.Name, n); 544 return; 545 } 546 if (ntohl(tun.family) != AF_INET) 547 /* XXX: Should be maintaining drop/family counts ! */ 548 return; 549 } 550 551 if (((struct ip *)tun.data)->ip_dst.s_addr == 552 bundle->ncp.ipcp.my_ip.s_addr) { 553 /* we've been asked to send something addressed *to* us :( */ 554 if (Enabled(bundle, OPT_LOOPBACK)) { 555 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.in); 556 if (pri >= 0) { 557 n += sz - sizeof tun.data; 558 write(bundle->dev.fd, data, n); 559 log_Printf(LogDEBUG, "Looped back packet addressed to myself\n"); 560 } 561 return; 562 } else 563 log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n"); 564 } 565 566 /* 567 * Process on-demand dialup. Output packets are queued within tunnel 568 * device until IPCP is opened. 569 */ 570 571 if (bundle_Phase(bundle) == PHASE_DEAD) { 572 /* 573 * Note, we must be in AUTO mode :-/ otherwise our interface should 574 * *not* be UP and we can't receive data 575 */ 576 if ((pri = PacketCheck(bundle, tun.data, n, &bundle->filter.dial)) >= 0) 577 bundle_Open(bundle, NULL, PHYS_AUTO, 0); 578 else 579 /* 580 * Drop the packet. If we were to queue it, we'd just end up with 581 * a pile of timed-out data in our output queue by the time we get 582 * around to actually dialing. We'd also prematurely reach the 583 * threshold at which we stop select()ing to read() the tun 584 * device - breaking auto-dial. 585 */ 586 return; 587 } 588 589 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.out); 590 if (pri >= 0) 591 ip_Enqueue(&bundle->ncp.ipcp, pri, tun.data, n); 592 } 593} 594 595static int 596bundle_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle, 597 const fd_set *fdset) 598{ 599 struct datalink *dl; 600 int result = 0; 601 602 /* This is not actually necessary as struct mpserver doesn't Write() */ 603 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 604 descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset); 605 606 for (dl = bundle->links; dl; dl = dl->next) 607 if (descriptor_IsSet(&dl->desc, fdset)) 608 result += descriptor_Write(&dl->desc, bundle, fdset); 609 610 return result; 611} 612 613void 614bundle_LockTun(struct bundle *bundle) 615{ 616 FILE *lockfile; 617 char pidfile[MAXPATHLEN]; 618 619 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 620 lockfile = ID0fopen(pidfile, "w"); 621 if (lockfile != NULL) { 622 fprintf(lockfile, "%d\n", (int)getpid()); 623 fclose(lockfile); 624 } 625#ifndef RELEASE_CRUNCH 626 else 627 log_Printf(LogERROR, "Warning: Can't create %s: %s\n", 628 pidfile, strerror(errno)); 629#endif 630} 631 632static void 633bundle_UnlockTun(struct bundle *bundle) 634{ 635 char pidfile[MAXPATHLEN]; 636 637 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 638 ID0unlink(pidfile); 639} 640 641struct bundle * 642bundle_Create(const char *prefix, int type, int unit) 643{ 644 static struct bundle bundle; /* there can be only one */ 645 int enoentcount, err, minunit, maxunit; 646 const char *ifname; 647#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 648 int kldtried; 649#endif 650#if defined(TUNSIFMODE) || defined(TUNSLMODE) || defined(TUNSIFHEAD) 651 int iff; 652#endif 653 654 if (bundle.iface != NULL) { /* Already allocated ! */ 655 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n"); 656 return NULL; 657 } 658 659 if (unit == -1) { 660 minunit = 0; 661 maxunit = -1; 662 } else { 663 minunit = unit; 664 maxunit = unit + 1; 665 } 666 err = ENOENT; 667 enoentcount = 0; 668#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 669 kldtried = 0; 670#endif 671 for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) { 672 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d", 673 prefix, bundle.unit); 674 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR); 675 if (bundle.dev.fd >= 0) 676 break; 677 else if (errno == ENXIO) { 678#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 679 if (bundle.unit == minunit && !kldtried++) { 680 /* 681 * Attempt to load the tunnel interface KLD if it isn't loaded 682 * already. 683 */ 684 if (modfind("if_tun") == -1) { 685 if (ID0kldload("if_tun") != -1) { 686 bundle.unit--; 687 continue; 688 } 689 log_Printf(LogWARN, "kldload: if_tun: %s\n", strerror(errno)); 690 } 691 } 692#endif 693 err = errno; 694 break; 695 } else if (errno == ENOENT) { 696 if (++enoentcount > 2) 697 break; 698 } else 699 err = errno; 700 } 701 702 if (bundle.dev.fd < 0) { 703 if (unit == -1) 704 log_Printf(LogWARN, "No available tunnel devices found (%s)\n", 705 strerror(err)); 706 else 707 log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err)); 708 return NULL; 709 } 710 711 log_SetTun(bundle.unit); 712 713 ifname = strrchr(bundle.dev.Name, '/'); 714 if (ifname == NULL) 715 ifname = bundle.dev.Name; 716 else 717 ifname++; 718 719 bundle.iface = iface_Create(ifname); 720 if (bundle.iface == NULL) { 721 close(bundle.dev.fd); 722 return NULL; 723 } 724 725#ifdef TUNSIFMODE 726 /* Make sure we're POINTOPOINT */ 727 iff = IFF_POINTOPOINT; 728 if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0) 729 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n", 730 strerror(errno)); 731#endif 732 733#ifdef TUNSLMODE 734 /* Make sure we're not prepending sockaddrs */ 735 iff = 0; 736 if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0) 737 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n", 738 strerror(errno)); 739#endif 740 741#ifdef TUNSIFHEAD 742 /* We want the address family please ! */ 743 iff = 1; 744 if (ID0ioctl(bundle.dev.fd, TUNSIFHEAD, &iff) < 0) { 745 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFHEAD): %s\n", 746 strerror(errno)); 747 bundle.dev.header = 0; 748 } else 749 bundle.dev.header = 1; 750#else 751#ifdef __OpenBSD__ 752 /* Always present for OpenBSD */ 753 bundle.dev.header = 1; 754#else 755 /* 756 * If TUNSIFHEAD isn't available and we're not OpenBSD, assume 757 * everything's AF_INET (hopefully the tun device won't pass us 758 * anything else !). 759 */ 760 bundle.dev.header = 0; 761#endif 762#endif 763 764 if (!iface_SetFlags(bundle.iface, IFF_UP)) { 765 iface_Destroy(bundle.iface); 766 bundle.iface = NULL; 767 close(bundle.dev.fd); 768 return NULL; 769 } 770 771 log_Printf(LogPHASE, "Using interface: %s\n", ifname); 772 773 bundle.bandwidth = 0; 774 bundle.routing_seq = 0; 775 bundle.phase = PHASE_DEAD; 776 bundle.CleaningUp = 0; 777 bundle.NatEnabled = 0; 778 779 bundle.fsm.LayerStart = bundle_LayerStart; 780 bundle.fsm.LayerUp = bundle_LayerUp; 781 bundle.fsm.LayerDown = bundle_LayerDown; 782 bundle.fsm.LayerFinish = bundle_LayerFinish; 783 bundle.fsm.object = &bundle; 784 785 bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT; 786 bundle.cfg.idle.min_timeout = 0; 787 *bundle.cfg.auth.name = '\0'; 788 *bundle.cfg.auth.key = '\0'; 789 bundle.cfg.opt = OPT_SROUTES | OPT_IDCHECK | OPT_LOOPBACK | 790 OPT_THROUGHPUT | OPT_UTMP; 791 *bundle.cfg.label = '\0'; 792 bundle.cfg.mtu = DEF_MTU; 793 bundle.cfg.choked.timeout = CHOKED_TIMEOUT; 794 bundle.phys_type.all = type; 795 bundle.phys_type.open = 0; 796 bundle.upat = 0; 797 798 bundle.links = datalink_Create("deflink", &bundle, type); 799 if (bundle.links == NULL) { 800 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno)); 801 iface_Destroy(bundle.iface); 802 bundle.iface = NULL; 803 close(bundle.dev.fd); 804 return NULL; 805 } 806 807 bundle.desc.type = BUNDLE_DESCRIPTOR; 808 bundle.desc.UpdateSet = bundle_UpdateSet; 809 bundle.desc.IsSet = bundle_IsSet; 810 bundle.desc.Read = bundle_DescriptorRead; 811 bundle.desc.Write = bundle_DescriptorWrite; 812 813 mp_Init(&bundle.ncp.mp, &bundle); 814 815 /* Send over the first physical link by default */ 816 ipcp_Init(&bundle.ncp.ipcp, &bundle, &bundle.links->physical->link, 817 &bundle.fsm); 818 819 memset(&bundle.filter, '\0', sizeof bundle.filter); 820 bundle.filter.in.fragok = bundle.filter.in.logok = 1; 821 bundle.filter.in.name = "IN"; 822 bundle.filter.out.fragok = bundle.filter.out.logok = 1; 823 bundle.filter.out.name = "OUT"; 824 bundle.filter.dial.name = "DIAL"; 825 bundle.filter.dial.logok = 1; 826 bundle.filter.alive.name = "ALIVE"; 827 bundle.filter.alive.logok = 1; 828 { 829 int i; 830 for (i = 0; i < MAXFILTERS; i++) { 831 bundle.filter.in.rule[i].f_action = A_NONE; 832 bundle.filter.out.rule[i].f_action = A_NONE; 833 bundle.filter.dial.rule[i].f_action = A_NONE; 834 bundle.filter.alive.rule[i].f_action = A_NONE; 835 } 836 } 837 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer); 838 bundle.idle.done = 0; 839 bundle.notify.fd = -1; 840 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer); 841#ifndef NORADIUS 842 radius_Init(&bundle.radius); 843#endif 844 845 /* Clean out any leftover crud */ 846 iface_Clear(bundle.iface, IFACE_CLEAR_ALL); 847 848 bundle_LockTun(&bundle); 849 850 return &bundle; 851} 852 853static void 854bundle_DownInterface(struct bundle *bundle) 855{ 856 route_IfDelete(bundle, 1); 857 iface_ClearFlags(bundle->iface, IFF_UP); 858} 859 860void 861bundle_Destroy(struct bundle *bundle) 862{ 863 struct datalink *dl; 864 865 /* 866 * Clean up the interface. We don't need to timer_Stop()s, mp_Down(), 867 * ipcp_CleanInterface() and bundle_DownInterface() unless we're getting 868 * out under exceptional conditions such as a descriptor exception. 869 */ 870 timer_Stop(&bundle->idle.timer); 871 timer_Stop(&bundle->choked.timer); 872 mp_Down(&bundle->ncp.mp); 873 ipcp_CleanInterface(&bundle->ncp.ipcp); 874 bundle_DownInterface(bundle); 875 876#ifndef NORADIUS 877 /* Tell the radius server the bad news */ 878 radius_Destroy(&bundle->radius); 879#endif 880 881 /* Again, these are all DATALINK_CLOSED unless we're abending */ 882 dl = bundle->links; 883 while (dl) 884 dl = datalink_Destroy(dl); 885 886 ipcp_Destroy(&bundle->ncp.ipcp); 887 888 close(bundle->dev.fd); 889 bundle_UnlockTun(bundle); 890 891 /* In case we never made PHASE_NETWORK */ 892 bundle_Notify(bundle, EX_ERRDEAD); 893 894 iface_Destroy(bundle->iface); 895 bundle->iface = NULL; 896} 897 898struct rtmsg { 899 struct rt_msghdr m_rtm; 900 char m_space[64]; 901}; 902 903int 904bundle_SetRoute(struct bundle *bundle, int cmd, struct in_addr dst, 905 struct in_addr gateway, struct in_addr mask, int bang, int ssh) 906{ 907 struct rtmsg rtmes; 908 int s, nb, wb; 909 char *cp; 910 const char *cmdstr; 911 struct sockaddr_in rtdata; 912 int result = 1; 913 914 if (bang) 915 cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!"); 916 else 917 cmdstr = (cmd == RTM_ADD ? "Add" : "Delete"); 918 s = ID0socket(PF_ROUTE, SOCK_RAW, 0); 919 if (s < 0) { 920 log_Printf(LogERROR, "bundle_SetRoute: socket(): %s\n", strerror(errno)); 921 return result; 922 } 923 memset(&rtmes, '\0', sizeof rtmes); 924 rtmes.m_rtm.rtm_version = RTM_VERSION; 925 rtmes.m_rtm.rtm_type = cmd; 926 rtmes.m_rtm.rtm_addrs = RTA_DST; 927 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; 928 rtmes.m_rtm.rtm_pid = getpid(); 929 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 930 931 if (cmd == RTM_ADD || cmd == RTM_CHANGE) { 932 if (bundle->ncp.ipcp.cfg.sendpipe > 0) { 933 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.ipcp.cfg.sendpipe; 934 rtmes.m_rtm.rtm_inits |= RTV_SPIPE; 935 } 936 if (bundle->ncp.ipcp.cfg.recvpipe > 0) { 937 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.ipcp.cfg.recvpipe; 938 rtmes.m_rtm.rtm_inits |= RTV_RPIPE; 939 } 940 } 941 942 memset(&rtdata, '\0', sizeof rtdata); 943 rtdata.sin_len = sizeof rtdata; 944 rtdata.sin_family = AF_INET; 945 rtdata.sin_port = 0; 946 rtdata.sin_addr = dst; 947 948 cp = rtmes.m_space; 949 memcpy(cp, &rtdata, rtdata.sin_len); 950 cp += rtdata.sin_len; 951 if (cmd == RTM_ADD) { 952 if (gateway.s_addr == INADDR_ANY) { 953 if (!ssh) 954 log_Printf(LogERROR, "bundle_SetRoute: Cannot add a route with" 955 " destination 0.0.0.0\n"); 956 close(s); 957 return result; 958 } else { 959 rtdata.sin_addr = gateway; 960 memcpy(cp, &rtdata, rtdata.sin_len); 961 cp += rtdata.sin_len; 962 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; 963 } 964 } 965 966 if (dst.s_addr == INADDR_ANY) 967 mask.s_addr = INADDR_ANY; 968 969 if (cmd == RTM_ADD || dst.s_addr == INADDR_ANY) { 970 rtdata.sin_addr = mask; 971 memcpy(cp, &rtdata, rtdata.sin_len); 972 cp += rtdata.sin_len; 973 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; 974 } 975 976 nb = cp - (char *) &rtmes; 977 rtmes.m_rtm.rtm_msglen = nb; 978 wb = ID0write(s, &rtmes, nb); 979 if (wb < 0) { 980 log_Printf(LogTCPIP, "bundle_SetRoute failure:\n"); 981 log_Printf(LogTCPIP, "bundle_SetRoute: Cmd = %s\n", cmdstr); 982 log_Printf(LogTCPIP, "bundle_SetRoute: Dst = %s\n", inet_ntoa(dst)); 983 log_Printf(LogTCPIP, "bundle_SetRoute: Gateway = %s\n", 984 inet_ntoa(gateway)); 985 log_Printf(LogTCPIP, "bundle_SetRoute: Mask = %s\n", inet_ntoa(mask)); 986failed: 987 if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST || 988 (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) { 989 if (!bang) { 990 log_Printf(LogWARN, "Add route failed: %s already exists\n", 991 dst.s_addr == 0 ? "default" : inet_ntoa(dst)); 992 result = 0; /* Don't add to our dynamic list */ 993 } else { 994 rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE; 995 if ((wb = ID0write(s, &rtmes, nb)) < 0) 996 goto failed; 997 } 998 } else if (cmd == RTM_DELETE && 999 (rtmes.m_rtm.rtm_errno == ESRCH || 1000 (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) { 1001 if (!bang) 1002 log_Printf(LogWARN, "Del route failed: %s: Non-existent\n", 1003 inet_ntoa(dst)); 1004 } else if (rtmes.m_rtm.rtm_errno == 0) { 1005 if (!ssh || errno != ENETUNREACH) 1006 log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr, 1007 inet_ntoa(dst), strerror(errno)); 1008 } else 1009 log_Printf(LogWARN, "%s route failed: %s: %s\n", 1010 cmdstr, inet_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno)); 1011 } 1012 log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %x, gateway = %x\n", 1013 wb, cmdstr, (unsigned)dst.s_addr, (unsigned)gateway.s_addr); 1014 close(s); 1015 1016 return result; 1017} 1018 1019void 1020bundle_LinkClosed(struct bundle *bundle, struct datalink *dl) 1021{ 1022 /* 1023 * Our datalink has closed. 1024 * CleanDatalinks() (called from DoLoop()) will remove closed 1025 * BACKGROUND, FOREGROUND and DIRECT links. 1026 * If it's the last data link, enter phase DEAD. 1027 * 1028 * NOTE: dl may not be in our list (bundle_SendDatalink()) ! 1029 */ 1030 1031 struct datalink *odl; 1032 int other_links; 1033 1034 log_SetTtyCommandMode(dl); 1035 1036 other_links = 0; 1037 for (odl = bundle->links; odl; odl = odl->next) 1038 if (odl != dl && odl->state != DATALINK_CLOSED) 1039 other_links++; 1040 1041 if (!other_links) { 1042 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */ 1043 bundle_DownInterface(bundle); 1044 fsm2initial(&bundle->ncp.ipcp.fsm); 1045 bundle_NewPhase(bundle, PHASE_DEAD); 1046 bundle_StopIdleTimer(bundle); 1047 } 1048} 1049 1050void 1051bundle_Open(struct bundle *bundle, const char *name, int mask, int force) 1052{ 1053 /* 1054 * Please open the given datalink, or all if name == NULL 1055 */ 1056 struct datalink *dl; 1057 1058 for (dl = bundle->links; dl; dl = dl->next) 1059 if (name == NULL || !strcasecmp(dl->name, name)) { 1060 if ((mask & dl->physical->type) && 1061 (dl->state == DATALINK_CLOSED || 1062 (force && dl->state == DATALINK_OPENING && 1063 dl->dial.timer.state == TIMER_RUNNING))) { 1064 if (force) /* Ignore redial timeout ? */ 1065 timer_Stop(&dl->dial.timer); 1066 datalink_Up(dl, 1, 1); 1067 if (mask & PHYS_AUTO) 1068 /* Only one AUTO link at a time */ 1069 break; 1070 } 1071 if (name != NULL) 1072 break; 1073 } 1074} 1075 1076struct datalink * 1077bundle2datalink(struct bundle *bundle, const char *name) 1078{ 1079 struct datalink *dl; 1080 1081 if (name != NULL) { 1082 for (dl = bundle->links; dl; dl = dl->next) 1083 if (!strcasecmp(dl->name, name)) 1084 return dl; 1085 } else if (bundle->links && !bundle->links->next) 1086 return bundle->links; 1087 1088 return NULL; 1089} 1090 1091int 1092bundle_ShowLinks(struct cmdargs const *arg) 1093{ 1094 struct datalink *dl; 1095 struct pppThroughput *t; 1096 int secs; 1097 1098 for (dl = arg->bundle->links; dl; dl = dl->next) { 1099 prompt_Printf(arg->prompt, "Name: %s [%s, %s]", 1100 dl->name, mode2Nam(dl->physical->type), datalink_State(dl)); 1101 if (dl->physical->link.throughput.rolling && dl->state == DATALINK_OPEN) 1102 prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)", 1103 dl->mp.bandwidth ? dl->mp.bandwidth : 1104 physical_GetSpeed(dl->physical), 1105 dl->physical->link.throughput.OctetsPerSecond * 8, 1106 dl->physical->link.throughput.OctetsPerSecond); 1107 prompt_Printf(arg->prompt, "\n"); 1108 } 1109 1110 t = &arg->bundle->ncp.mp.link.throughput; 1111 secs = t->downtime ? 0 : throughput_uptime(t); 1112 if (secs > t->SamplePeriod) 1113 secs = t->SamplePeriod; 1114 if (secs) 1115 prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)" 1116 " over the last %d secs\n", t->OctetsPerSecond * 8, 1117 t->OctetsPerSecond, secs); 1118 1119 return 0; 1120} 1121 1122static const char * 1123optval(struct bundle *bundle, int bit) 1124{ 1125 return (bundle->cfg.opt & bit) ? "enabled" : "disabled"; 1126} 1127 1128int 1129bundle_ShowStatus(struct cmdargs const *arg) 1130{ 1131 int remaining; 1132 1133 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle)); 1134 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name); 1135 prompt_Printf(arg->prompt, " Interface: %s @ %lubps", 1136 arg->bundle->iface->name, arg->bundle->bandwidth); 1137 1138 if (arg->bundle->upat) { 1139 int secs = time(NULL) - arg->bundle->upat; 1140 1141 prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600, 1142 (secs / 60) % 60, secs % 60); 1143 } 1144 1145 prompt_Printf(arg->prompt, "\n\nDefaults:\n"); 1146 prompt_Printf(arg->prompt, " Label: %s\n", arg->bundle->cfg.label); 1147 prompt_Printf(arg->prompt, " Auth name: %s\n", 1148 arg->bundle->cfg.auth.name); 1149 1150 prompt_Printf(arg->prompt, " Choked Timer: %ds\n", 1151 arg->bundle->cfg.choked.timeout); 1152 1153#ifndef NORADIUS 1154 radius_Show(&arg->bundle->radius, arg->prompt); 1155#endif 1156 1157 prompt_Printf(arg->prompt, " Idle Timer: "); 1158 if (arg->bundle->cfg.idle.timeout) { 1159 prompt_Printf(arg->prompt, "%ds", arg->bundle->cfg.idle.timeout); 1160 if (arg->bundle->cfg.idle.min_timeout) 1161 prompt_Printf(arg->prompt, ", min %ds", 1162 arg->bundle->cfg.idle.min_timeout); 1163 remaining = bundle_RemainingIdleTime(arg->bundle); 1164 if (remaining != -1) 1165 prompt_Printf(arg->prompt, " (%ds remaining)", remaining); 1166 prompt_Printf(arg->prompt, "\n"); 1167 } else 1168 prompt_Printf(arg->prompt, "disabled\n"); 1169 prompt_Printf(arg->prompt, " MTU: "); 1170 if (arg->bundle->cfg.mtu) 1171 prompt_Printf(arg->prompt, "%d\n", arg->bundle->cfg.mtu); 1172 else 1173 prompt_Printf(arg->prompt, "unspecified\n"); 1174 1175 prompt_Printf(arg->prompt, " sendpipe: "); 1176 if (arg->bundle->ncp.ipcp.cfg.sendpipe > 0) 1177 prompt_Printf(arg->prompt, "%-20ld", arg->bundle->ncp.ipcp.cfg.sendpipe); 1178 else 1179 prompt_Printf(arg->prompt, "unspecified "); 1180 prompt_Printf(arg->prompt, " recvpipe: "); 1181 if (arg->bundle->ncp.ipcp.cfg.recvpipe > 0) 1182 prompt_Printf(arg->prompt, "%ld\n", arg->bundle->ncp.ipcp.cfg.recvpipe); 1183 else 1184 prompt_Printf(arg->prompt, "unspecified\n"); 1185 1186 prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s", 1187 optval(arg->bundle, OPT_SROUTES)); 1188 prompt_Printf(arg->prompt, " ID check: %s\n", 1189 optval(arg->bundle, OPT_IDCHECK)); 1190 prompt_Printf(arg->prompt, " Keep-Session: %-20.20s", 1191 optval(arg->bundle, OPT_KEEPSESSION)); 1192 prompt_Printf(arg->prompt, " Loopback: %s\n", 1193 optval(arg->bundle, OPT_LOOPBACK)); 1194 prompt_Printf(arg->prompt, " PasswdAuth: %-20.20s", 1195 optval(arg->bundle, OPT_PASSWDAUTH)); 1196 prompt_Printf(arg->prompt, " Proxy: %s\n", 1197 optval(arg->bundle, OPT_PROXY)); 1198 prompt_Printf(arg->prompt, " Proxyall: %-20.20s", 1199 optval(arg->bundle, OPT_PROXYALL)); 1200 prompt_Printf(arg->prompt, " Throughput: %s\n", 1201 optval(arg->bundle, OPT_THROUGHPUT)); 1202 prompt_Printf(arg->prompt, " Utmp Logging: %-20.20s", 1203 optval(arg->bundle, OPT_UTMP)); 1204 prompt_Printf(arg->prompt, " Iface-Alias: %s\n", 1205 optval(arg->bundle, OPT_IFACEALIAS)); 1206 1207 return 0; 1208} 1209 1210static void 1211bundle_IdleTimeout(void *v) 1212{ 1213 struct bundle *bundle = (struct bundle *)v; 1214 1215 log_Printf(LogPHASE, "Idle timer expired.\n"); 1216 bundle_StopIdleTimer(bundle); 1217 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1218} 1219 1220/* 1221 * Start Idle timer. If timeout is reached, we call bundle_Close() to 1222 * close LCP and link. 1223 */ 1224void 1225bundle_StartIdleTimer(struct bundle *bundle) 1226{ 1227 timer_Stop(&bundle->idle.timer); 1228 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1229 bundle->phys_type.open && bundle->cfg.idle.timeout) { 1230 int secs; 1231 1232 secs = bundle->cfg.idle.timeout; 1233 if (bundle->cfg.idle.min_timeout > secs && bundle->upat) { 1234 int up = time(NULL) - bundle->upat; 1235 1236 if ((long long)bundle->cfg.idle.min_timeout - up > (long long)secs) 1237 secs = bundle->cfg.idle.min_timeout - up; 1238 } 1239 bundle->idle.timer.func = bundle_IdleTimeout; 1240 bundle->idle.timer.name = "idle"; 1241 bundle->idle.timer.load = secs * SECTICKS; 1242 bundle->idle.timer.arg = bundle; 1243 timer_Start(&bundle->idle.timer); 1244 bundle->idle.done = time(NULL) + secs; 1245 } 1246} 1247 1248void 1249bundle_SetIdleTimer(struct bundle *bundle, int timeout, int min_timeout) 1250{ 1251 bundle->cfg.idle.timeout = timeout; 1252 if (min_timeout >= 0) 1253 bundle->cfg.idle.min_timeout = min_timeout; 1254 if (bundle_LinkIsUp(bundle)) 1255 bundle_StartIdleTimer(bundle); 1256} 1257 1258void 1259bundle_StopIdleTimer(struct bundle *bundle) 1260{ 1261 timer_Stop(&bundle->idle.timer); 1262 bundle->idle.done = 0; 1263} 1264 1265static int 1266bundle_RemainingIdleTime(struct bundle *bundle) 1267{ 1268 if (bundle->idle.done) 1269 return bundle->idle.done - time(NULL); 1270 return -1; 1271} 1272 1273int 1274bundle_IsDead(struct bundle *bundle) 1275{ 1276 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp); 1277} 1278 1279static struct datalink * 1280bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl) 1281{ 1282 struct datalink **dlp; 1283 1284 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next) 1285 if (*dlp == dl) { 1286 *dlp = dl->next; 1287 dl->next = NULL; 1288 bundle_LinksRemoved(bundle); 1289 return dl; 1290 } 1291 1292 return NULL; 1293} 1294 1295static void 1296bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl) 1297{ 1298 struct datalink **dlp = &bundle->links; 1299 1300 while (*dlp) 1301 dlp = &(*dlp)->next; 1302 1303 *dlp = dl; 1304 dl->next = NULL; 1305 1306 bundle_LinkAdded(bundle, dl); 1307 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1308} 1309 1310void 1311bundle_CleanDatalinks(struct bundle *bundle) 1312{ 1313 struct datalink **dlp = &bundle->links; 1314 int found = 0; 1315 1316 while (*dlp) 1317 if ((*dlp)->state == DATALINK_CLOSED && 1318 (*dlp)->physical->type & 1319 (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) { 1320 *dlp = datalink_Destroy(*dlp); 1321 found++; 1322 } else 1323 dlp = &(*dlp)->next; 1324 1325 if (found) 1326 bundle_LinksRemoved(bundle); 1327} 1328 1329int 1330bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl, 1331 const char *name) 1332{ 1333 if (bundle2datalink(bundle, name)) { 1334 log_Printf(LogWARN, "Clone: %s: name already exists\n", name); 1335 return 0; 1336 } 1337 1338 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name)); 1339 return 1; 1340} 1341 1342void 1343bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl) 1344{ 1345 dl = bundle_DatalinkLinkout(bundle, dl); 1346 if (dl) 1347 datalink_Destroy(dl); 1348} 1349 1350void 1351bundle_SetLabel(struct bundle *bundle, const char *label) 1352{ 1353 if (label) 1354 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1); 1355 else 1356 *bundle->cfg.label = '\0'; 1357} 1358 1359const char * 1360bundle_GetLabel(struct bundle *bundle) 1361{ 1362 return *bundle->cfg.label ? bundle->cfg.label : NULL; 1363} 1364 1365int 1366bundle_LinkSize() 1367{ 1368 struct iovec iov[SCATTER_SEGMENTS]; 1369 int niov, expect, f; 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 0; 1377 } 1378 1379 for (f = expect = 0; f < niov; f++) 1380 expect += iov[f].iov_len; 1381 1382 return expect; 1383} 1384 1385void 1386bundle_ReceiveDatalink(struct bundle *bundle, int s) 1387{ 1388 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1389 int niov, expect, f, *fd, nfd, onfd, got; 1390 struct iovec iov[SCATTER_SEGMENTS]; 1391 struct cmsghdr *cmsg; 1392 struct msghdr msg; 1393 struct datalink *dl; 1394 pid_t pid; 1395 1396 log_Printf(LogPHASE, "Receiving datalink\n"); 1397 1398 /* 1399 * Create our scatter/gather array - passing NULL gets the space 1400 * allocation requirement rather than actually flattening the 1401 * structures. 1402 */ 1403 iov[0].iov_len = strlen(Version) + 1; 1404 iov[0].iov_base = NULL; 1405 niov = 1; 1406 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1407 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1408 return; 1409 } 1410 1411 /* Allocate the scatter/gather array for recvmsg() */ 1412 for (f = expect = 0; f < niov; f++) { 1413 if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) { 1414 log_Printf(LogERROR, "Cannot allocate space to receive link\n"); 1415 return; 1416 } 1417 if (f) 1418 expect += iov[f].iov_len; 1419 } 1420 1421 /* Set up our message */ 1422 cmsg = (struct cmsghdr *)cmsgbuf; 1423 cmsg->cmsg_len = sizeof cmsgbuf; 1424 cmsg->cmsg_level = SOL_SOCKET; 1425 cmsg->cmsg_type = 0; 1426 1427 memset(&msg, '\0', sizeof msg); 1428 msg.msg_name = NULL; 1429 msg.msg_namelen = 0; 1430 msg.msg_iov = iov; 1431 msg.msg_iovlen = 1; /* Only send the version at the first pass */ 1432 msg.msg_control = cmsgbuf; 1433 msg.msg_controllen = sizeof cmsgbuf; 1434 1435 log_Printf(LogDEBUG, "Expecting %u scatter/gather bytes\n", 1436 (unsigned)iov[0].iov_len); 1437 1438 if ((got = recvmsg(s, &msg, MSG_WAITALL)) != iov[0].iov_len) { 1439 if (got == -1) 1440 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); 1441 else 1442 log_Printf(LogERROR, "Failed recvmsg: Got %d, not %u\n", 1443 got, (unsigned)iov[0].iov_len); 1444 while (niov--) 1445 free(iov[niov].iov_base); 1446 return; 1447 } 1448 1449 if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { 1450 log_Printf(LogERROR, "Recvmsg: no descriptors received !\n"); 1451 while (niov--) 1452 free(iov[niov].iov_base); 1453 return; 1454 } 1455 1456 fd = (int *)(cmsg + 1); 1457 nfd = (cmsg->cmsg_len - sizeof *cmsg) / sizeof(int); 1458 1459 if (nfd < 2) { 1460 log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n", 1461 nfd, nfd == 1 ? "" : "s"); 1462 while (nfd--) 1463 close(fd[nfd]); 1464 while (niov--) 1465 free(iov[niov].iov_base); 1466 return; 1467 } 1468 1469 /* 1470 * We've successfully received two or more open file descriptors 1471 * through our socket, plus a version string. Make sure it's the 1472 * correct version, and drop the connection if it's not. 1473 */ 1474 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) { 1475 log_Printf(LogWARN, "Cannot receive datalink, incorrect version" 1476 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len, 1477 (char *)iov[0].iov_base, Version); 1478 while (nfd--) 1479 close(fd[nfd]); 1480 while (niov--) 1481 free(iov[niov].iov_base); 1482 return; 1483 } 1484 1485 /* 1486 * Everything looks good. Send the other side our process id so that 1487 * they can transfer lock ownership, and wait for them to send the 1488 * actual link data. 1489 */ 1490 pid = getpid(); 1491 if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) { 1492 if (got == -1) 1493 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1494 else 1495 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, 1496 (int)(sizeof pid)); 1497 while (nfd--) 1498 close(fd[nfd]); 1499 while (niov--) 1500 free(iov[niov].iov_base); 1501 return; 1502 } 1503 1504 if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) { 1505 if (got == -1) 1506 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1507 else 1508 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, expect); 1509 while (nfd--) 1510 close(fd[nfd]); 1511 while (niov--) 1512 free(iov[niov].iov_base); 1513 return; 1514 } 1515 close(fd[1]); 1516 1517 onfd = nfd; /* We've got this many in our array */ 1518 nfd -= 2; /* Don't include p->fd and our reply descriptor */ 1519 niov = 1; /* Skip the version id */ 1520 dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, fd[0], 1521 fd + 2, &nfd); 1522 if (dl) { 1523 1524 if (nfd) { 1525 log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d " 1526 "auxiliary file descriptors (%d remain)\n", onfd, nfd); 1527 datalink_Destroy(dl); 1528 while (nfd--) 1529 close(fd[onfd--]); 1530 close(fd[0]); 1531 } else { 1532 bundle_DatalinkLinkin(bundle, dl); 1533 datalink_AuthOk(dl); 1534 bundle_CalculateBandwidth(dl->bundle); 1535 } 1536 } else { 1537 while (nfd--) 1538 close(fd[onfd--]); 1539 close(fd[0]); 1540 close(fd[1]); 1541 } 1542 1543 free(iov[0].iov_base); 1544} 1545 1546void 1547bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun) 1548{ 1549 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1550 const char *constlock; 1551 char *lock; 1552 struct cmsghdr *cmsg; 1553 struct msghdr msg; 1554 struct iovec iov[SCATTER_SEGMENTS]; 1555 int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2], got; 1556 pid_t newpid; 1557 1558 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name); 1559 1560 /* Record the base device name for a lock transfer later */ 1561 constlock = physical_LockedDevice(dl->physical); 1562 if (constlock) { 1563 lock = alloca(strlen(constlock) + 1); 1564 strcpy(lock, constlock); 1565 } else 1566 lock = NULL; 1567 1568 bundle_LinkClosed(dl->bundle, dl); 1569 bundle_DatalinkLinkout(dl->bundle, dl); 1570 1571 /* Build our scatter/gather array */ 1572 iov[0].iov_len = strlen(Version) + 1; 1573 iov[0].iov_base = strdup(Version); 1574 niov = 1; 1575 nfd = 0; 1576 1577 fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd); 1578 1579 if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) { 1580 /* 1581 * fd[1] is used to get the peer process id back, then to confirm that 1582 * we've transferred any device locks to that process id. 1583 */ 1584 fd[1] = reply[1]; 1585 1586 nfd += 2; /* Include fd[0] and fd[1] */ 1587 memset(&msg, '\0', sizeof msg); 1588 1589 msg.msg_name = NULL; 1590 msg.msg_namelen = 0; 1591 /* 1592 * Only send the version to start... We used to send the whole lot, but 1593 * this caused problems with our RECVBUF size as a single link is about 1594 * 22k ! This way, we should bump into no limits. 1595 */ 1596 msg.msg_iovlen = 1; 1597 msg.msg_iov = iov; 1598 msg.msg_control = cmsgbuf; 1599 msg.msg_controllen = sizeof *cmsg + sizeof(int) * nfd; 1600 msg.msg_flags = 0; 1601 1602 cmsg = (struct cmsghdr *)cmsgbuf; 1603 cmsg->cmsg_len = msg.msg_controllen; 1604 cmsg->cmsg_level = SOL_SOCKET; 1605 cmsg->cmsg_type = SCM_RIGHTS; 1606 1607 for (f = 0; f < nfd; f++) 1608 *((int *)(cmsg + 1) + f) = fd[f]; 1609 1610 for (f = 1, expect = 0; f < niov; f++) 1611 expect += iov[f].iov_len; 1612 1613 if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1) 1614 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1615 strerror(errno)); 1616 if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1) 1617 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1618 strerror(errno)); 1619 1620 log_Printf(LogDEBUG, "Sending %d descriptor%s and %u bytes in scatter" 1621 "/gather array\n", nfd, nfd == 1 ? "" : "s", 1622 (unsigned)iov[0].iov_len); 1623 1624 if ((got = sendmsg(s, &msg, 0)) == -1) 1625 log_Printf(LogERROR, "Failed sendmsg: %s: %s\n", 1626 sun->sun_path, strerror(errno)); 1627 else if (got != iov[0].iov_len) 1628 log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %d of %u\n", 1629 sun->sun_path, got, (unsigned)iov[0].iov_len); 1630 else { 1631 /* We must get the ACK before closing the descriptor ! */ 1632 int res; 1633 1634 if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) { 1635 log_Printf(LogDEBUG, "Received confirmation from pid %d\n", 1636 (int)newpid); 1637 if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK) 1638 log_Printf(LogPHASE, "uu_lock_txfr: %s\n", uu_lockerr(res)); 1639 1640 log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect); 1641 if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) { 1642 if (got == -1) 1643 log_Printf(LogERROR, "%s: Failed writev: %s\n", 1644 sun->sun_path, strerror(errno)); 1645 else 1646 log_Printf(LogERROR, "%s: Failed writev: Wrote %d of %d\n", 1647 sun->sun_path, got, expect); 1648 } 1649 } else if (got == -1) 1650 log_Printf(LogERROR, "%s: Failed socketpair read: %s\n", 1651 sun->sun_path, strerror(errno)); 1652 else 1653 log_Printf(LogERROR, "%s: Failed socketpair read: Got %d of %d\n", 1654 sun->sun_path, got, (int)(sizeof newpid)); 1655 } 1656 1657 close(reply[0]); 1658 close(reply[1]); 1659 1660 newsid = Enabled(dl->bundle, OPT_KEEPSESSION) || 1661 tcgetpgrp(fd[0]) == getpgrp(); 1662 while (nfd) 1663 close(fd[--nfd]); 1664 if (newsid) 1665 bundle_setsid(dl->bundle, got != -1); 1666 } 1667 close(s); 1668 1669 while (niov--) 1670 free(iov[niov].iov_base); 1671} 1672 1673int 1674bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl, 1675 const char *name) 1676{ 1677 struct datalink *dl; 1678 1679 if (!strcasecmp(ndl->name, name)) 1680 return 1; 1681 1682 for (dl = bundle->links; dl; dl = dl->next) 1683 if (!strcasecmp(dl->name, name)) 1684 return 0; 1685 1686 datalink_Rename(ndl, name); 1687 return 1; 1688} 1689 1690int 1691bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode) 1692{ 1693 int omode; 1694 1695 omode = dl->physical->type; 1696 if (omode == mode) 1697 return 1; 1698 1699 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO)) 1700 /* First auto link */ 1701 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) { 1702 log_Printf(LogWARN, "You must `set ifaddr' or `open' before" 1703 " changing mode to %s\n", mode2Nam(mode)); 1704 return 0; 1705 } 1706 1707 if (!datalink_SetMode(dl, mode)) 1708 return 0; 1709 1710 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) && 1711 bundle->phase != PHASE_NETWORK) 1712 /* First auto link, we need an interface */ 1713 ipcp_InterfaceUp(&bundle->ncp.ipcp); 1714 1715 /* Regenerate phys_type and adjust idle timer */ 1716 bundle_LinksRemoved(bundle); 1717 1718 return 1; 1719} 1720 1721void 1722bundle_setsid(struct bundle *bundle, int holdsession) 1723{ 1724 /* 1725 * Lose the current session. This means getting rid of our pid 1726 * too so that the tty device will really go away, and any getty 1727 * etc will be allowed to restart. 1728 */ 1729 pid_t pid, orig; 1730 int fds[2]; 1731 char done; 1732 struct datalink *dl; 1733 1734 if (!holdsession && bundle_IsDead(bundle)) { 1735 /* 1736 * No need to lose our session after all... we're going away anyway 1737 * 1738 * We should really stop the timer and pause if holdsession is set and 1739 * the bundle's dead, but that leaves other resources lying about :-( 1740 */ 1741 return; 1742 } 1743 1744 orig = getpid(); 1745 if (pipe(fds) == -1) { 1746 log_Printf(LogERROR, "pipe: %s\n", strerror(errno)); 1747 return; 1748 } 1749 switch ((pid = fork())) { 1750 case -1: 1751 log_Printf(LogERROR, "fork: %s\n", strerror(errno)); 1752 close(fds[0]); 1753 close(fds[1]); 1754 return; 1755 case 0: 1756 close(fds[1]); 1757 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1758 close(fds[0]); 1759 if (pipe(fds) == -1) { 1760 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno)); 1761 return; 1762 } 1763 switch ((pid = fork())) { 1764 case -1: 1765 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno)); 1766 close(fds[0]); 1767 close(fds[1]); 1768 return; 1769 case 0: 1770 close(fds[1]); 1771 bundle_LockTun(bundle); /* update pid */ 1772 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1773 close(fds[0]); 1774 setsid(); 1775 bundle_ChangedPID(bundle); 1776 log_Printf(LogPHASE, "%d -> %d: %s session control\n", 1777 (int)orig, (int)getpid(), 1778 holdsession ? "Passed" : "Dropped"); 1779 timer_InitService(0); /* Start the Timer Service */ 1780 break; 1781 default: 1782 close(fds[0]); 1783 /* Give away all our physical locks (to the final process) */ 1784 for (dl = bundle->links; dl; dl = dl->next) 1785 if (dl->state != DATALINK_CLOSED) 1786 physical_ChangedPid(dl->physical, pid); 1787 write(fds[1], "!", 1); /* done */ 1788 close(fds[1]); 1789 _exit(0); 1790 break; 1791 } 1792 break; 1793 default: 1794 close(fds[0]); 1795 /* Give away all our physical locks (to the intermediate process) */ 1796 for (dl = bundle->links; dl; dl = dl->next) 1797 if (dl->state != DATALINK_CLOSED) 1798 physical_ChangedPid(dl->physical, pid); 1799 write(fds[1], "!", 1); /* done */ 1800 close(fds[1]); 1801 if (holdsession) { 1802 int fd, status; 1803 1804 timer_TermService(); 1805 signal(SIGPIPE, SIG_DFL); 1806 signal(SIGALRM, SIG_DFL); 1807 signal(SIGHUP, SIG_DFL); 1808 signal(SIGTERM, SIG_DFL); 1809 signal(SIGINT, SIG_DFL); 1810 signal(SIGQUIT, SIG_DFL); 1811 for (fd = getdtablesize(); fd >= 0; fd--) 1812 close(fd); 1813 /* 1814 * Reap the intermediate process. As we're not exiting but the 1815 * intermediate is, we don't want it to become defunct. 1816 */ 1817 waitpid(pid, &status, 0); 1818 /* Tweak our process arguments.... */ 1819 ID0setproctitle("session owner"); 1820 setuid(ID0realuid()); 1821 /* 1822 * Hang around for a HUP. This should happen as soon as the 1823 * ppp that we passed our ctty descriptor to closes it. 1824 * NOTE: If this process dies, the passed descriptor becomes 1825 * invalid and will give a select() error by setting one 1826 * of the error fds, aborting the other ppp. We don't 1827 * want that to happen ! 1828 */ 1829 pause(); 1830 } 1831 _exit(0); 1832 break; 1833 } 1834} 1835 1836int 1837bundle_HighestState(struct bundle *bundle) 1838{ 1839 struct datalink *dl; 1840 int result = DATALINK_CLOSED; 1841 1842 for (dl = bundle->links; dl; dl = dl->next) 1843 if (result < dl->state) 1844 result = dl->state; 1845 1846 return result; 1847} 1848 1849int 1850bundle_Exception(struct bundle *bundle, int fd) 1851{ 1852 struct datalink *dl; 1853 1854 for (dl = bundle->links; dl; dl = dl->next) 1855 if (dl->physical->fd == fd) { 1856 datalink_Down(dl, CLOSE_NORMAL); 1857 return 1; 1858 } 1859 1860 return 0; 1861} 1862 1863void 1864bundle_AdjustFilters(struct bundle *bundle, struct in_addr *my_ip, 1865 struct in_addr *peer_ip) 1866{ 1867 filter_AdjustAddr(&bundle->filter.in, my_ip, peer_ip, NULL); 1868 filter_AdjustAddr(&bundle->filter.out, my_ip, peer_ip, NULL); 1869 filter_AdjustAddr(&bundle->filter.dial, my_ip, peer_ip, NULL); 1870 filter_AdjustAddr(&bundle->filter.alive, my_ip, peer_ip, NULL); 1871} 1872 1873void 1874bundle_AdjustDNS(struct bundle *bundle, struct in_addr dns[2]) 1875{ 1876 filter_AdjustAddr(&bundle->filter.in, NULL, NULL, dns); 1877 filter_AdjustAddr(&bundle->filter.out, NULL, NULL, dns); 1878 filter_AdjustAddr(&bundle->filter.dial, NULL, NULL, dns); 1879 filter_AdjustAddr(&bundle->filter.alive, NULL, NULL, dns); 1880} 1881 1882void 1883bundle_CalculateBandwidth(struct bundle *bundle) 1884{ 1885 struct datalink *dl; 1886 int mtu, sp; 1887 1888 bundle->bandwidth = 0; 1889 mtu = 0; 1890 for (dl = bundle->links; dl; dl = dl->next) 1891 if (dl->state == DATALINK_OPEN) { 1892 if ((sp = dl->mp.bandwidth) == 0 && 1893 (sp = physical_GetSpeed(dl->physical)) == 0) 1894 log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n", 1895 dl->name, dl->physical->name.full); 1896 else 1897 bundle->bandwidth += sp; 1898 if (!bundle->ncp.mp.active) { 1899 mtu = dl->physical->link.lcp.his_mru; 1900 break; 1901 } 1902 } 1903 1904 if(bundle->bandwidth == 0) 1905 bundle->bandwidth = 115200; /* Shrug */ 1906 1907 if (bundle->ncp.mp.active) 1908 mtu = bundle->ncp.mp.peer_mrru; 1909 else if (!mtu) 1910 mtu = 1500; 1911 1912#ifndef NORADIUS 1913 if (bundle->radius.valid && bundle->radius.mtu && bundle->radius.mtu < mtu) { 1914 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n", 1915 bundle->radius.mtu); 1916 mtu = bundle->radius.mtu; 1917 } 1918#endif 1919 1920 tun_configure(bundle, mtu); 1921} 1922 1923void 1924bundle_AutoAdjust(struct bundle *bundle, int percent, int what) 1925{ 1926 struct datalink *dl, *choice, *otherlinkup; 1927 1928 choice = otherlinkup = NULL; 1929 for (dl = bundle->links; dl; dl = dl->next) 1930 if (dl->physical->type == PHYS_AUTO) { 1931 if (dl->state == DATALINK_OPEN) { 1932 if (what == AUTO_DOWN) { 1933 if (choice) 1934 otherlinkup = choice; 1935 choice = dl; 1936 } 1937 } else if (dl->state == DATALINK_CLOSED) { 1938 if (what == AUTO_UP) { 1939 choice = dl; 1940 break; 1941 } 1942 } else { 1943 /* An auto link in an intermediate state - forget it for the moment */ 1944 choice = NULL; 1945 break; 1946 } 1947 } else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN) 1948 otherlinkup = dl; 1949 1950 if (choice) { 1951 if (what == AUTO_UP) { 1952 log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n", 1953 percent, choice->name); 1954 datalink_Up(choice, 1, 1); 1955 mp_StopAutoloadTimer(&bundle->ncp.mp); 1956 } else if (otherlinkup) { /* Only bring the second-last link down */ 1957 log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n", 1958 percent, choice->name); 1959 datalink_Close(choice, CLOSE_STAYDOWN); 1960 mp_StopAutoloadTimer(&bundle->ncp.mp); 1961 } 1962 } 1963} 1964 1965int 1966bundle_WantAutoloadTimer(struct bundle *bundle) 1967{ 1968 struct datalink *dl; 1969 int autolink, opened; 1970 1971 if (bundle->phase == PHASE_NETWORK) { 1972 for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next) 1973 if (dl->physical->type == PHYS_AUTO) { 1974 if (++autolink == 2 || (autolink == 1 && opened)) 1975 /* Two auto links or one auto and one open in NETWORK phase */ 1976 return 1; 1977 } else if (dl->state == DATALINK_OPEN) { 1978 opened++; 1979 if (autolink) 1980 /* One auto and one open link in NETWORK phase */ 1981 return 1; 1982 } 1983 } 1984 1985 return 0; 1986} 1987 1988void 1989bundle_ChangedPID(struct bundle *bundle) 1990{ 1991#ifdef TUNSIFPID 1992 ioctl(bundle->dev.fd, TUNSIFPID, 0); 1993#endif 1994} 1995