bundle.c revision 58457
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 58457 2000-03-22 03:02:01Z 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 %s\n", 169 c == EX_NORMAL ? "success" : "failure"); 170 else 171 log_Printf(LogPHASE, "Failed to notify parent of success.\n"); 172 close(bundle->notify.fd); 173 bundle->notify.fd = -1; 174 } 175} 176 177static void 178bundle_ClearQueues(void *v) 179{ 180 struct bundle *bundle = (struct bundle *)v; 181 struct datalink *dl; 182 183 log_Printf(LogPHASE, "Clearing choked output queue\n"); 184 timer_Stop(&bundle->choked.timer); 185 186 /* 187 * Emergency time: 188 * 189 * We've had a full queue for PACKET_DEL_SECS seconds without being 190 * able to get rid of any of the packets. We've probably given up 191 * on the redials at this point, and the queued data has almost 192 * definitely been timed out by the layer above. As this is preventing 193 * us from reading the TUN_NAME device (we don't want to buffer stuff 194 * indefinitely), we may as well nuke this data and start with a clean 195 * slate ! 196 * 197 * Unfortunately, this has the side effect of shafting any compression 198 * dictionaries in use (causing the relevant RESET_REQ/RESET_ACK). 199 */ 200 201 ip_DeleteQueue(&bundle->ncp.ipcp); 202 mp_DeleteQueue(&bundle->ncp.mp); 203 for (dl = bundle->links; dl; dl = dl->next) 204 physical_DeleteQueue(dl->physical); 205} 206 207static void 208bundle_LinkAdded(struct bundle *bundle, struct datalink *dl) 209{ 210 bundle->phys_type.all |= dl->physical->type; 211 if (dl->state == DATALINK_OPEN) 212 bundle->phys_type.open |= dl->physical->type; 213 214 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 215 != bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED) 216 /* We may need to start our idle timer */ 217 bundle_StartIdleTimer(bundle); 218} 219 220void 221bundle_LinksRemoved(struct bundle *bundle) 222{ 223 struct datalink *dl; 224 225 bundle->phys_type.all = bundle->phys_type.open = 0; 226 for (dl = bundle->links; dl; dl = dl->next) 227 bundle_LinkAdded(bundle, dl); 228 229 bundle_CalculateBandwidth(bundle); 230 mp_CheckAutoloadTimer(&bundle->ncp.mp); 231 232 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 233 == bundle->phys_type.open) 234 bundle_StopIdleTimer(bundle); 235} 236 237static void 238bundle_LayerUp(void *v, struct fsm *fp) 239{ 240 /* 241 * The given fsm is now up 242 * If it's an LCP, adjust our phys_mode.open value and check the 243 * autoload timer. 244 * If it's the first NCP, calculate our bandwidth 245 * If it's the first NCP, set our ``upat'' time 246 * If it's the first NCP, start the idle timer. 247 * If it's an NCP, tell our -background parent to go away. 248 * If it's the first NCP, start the autoload timer 249 */ 250 struct bundle *bundle = (struct bundle *)v; 251 252 if (fp->proto == PROTO_LCP) { 253 struct physical *p = link2physical(fp->link); 254 255 bundle_LinkAdded(bundle, p->dl); 256 mp_CheckAutoloadTimer(&bundle->ncp.mp); 257 } else if (fp->proto == PROTO_IPCP) { 258 bundle_CalculateBandwidth(fp->bundle); 259 time(&bundle->upat); 260 bundle_StartIdleTimer(bundle); 261 bundle_Notify(bundle, EX_NORMAL); 262 mp_CheckAutoloadTimer(&fp->bundle->ncp.mp); 263 } 264} 265 266static void 267bundle_LayerDown(void *v, struct fsm *fp) 268{ 269 /* 270 * The given FSM has been told to come down. 271 * If it's our last NCP, stop the idle timer. 272 * If it's our last NCP, clear our ``upat'' value. 273 * If it's our last NCP, stop the autoload timer 274 * If it's an LCP, adjust our phys_type.open value and any timers. 275 * If it's an LCP and we're in multilink mode, adjust our tun 276 * speed and make sure our minimum sequence number is adjusted. 277 */ 278 279 struct bundle *bundle = (struct bundle *)v; 280 281 if (fp->proto == PROTO_IPCP) { 282 bundle_StopIdleTimer(bundle); 283 bundle->upat = 0; 284 mp_StopAutoloadTimer(&bundle->ncp.mp); 285 } else if (fp->proto == PROTO_LCP) { 286 bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */ 287 if (bundle->ncp.mp.active) { 288 struct datalink *dl; 289 struct datalink *lost; 290 291 lost = NULL; 292 for (dl = bundle->links; dl; dl = dl->next) 293 if (fp == &dl->physical->link.lcp.fsm) 294 lost = dl; 295 296 bundle_CalculateBandwidth(bundle); 297 298 if (lost) 299 mp_LinkLost(&bundle->ncp.mp, lost); 300 else 301 log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n", 302 fp->link->name); 303 } 304 } 305} 306 307static void 308bundle_LayerFinish(void *v, struct fsm *fp) 309{ 310 /* The given fsm is now down (fp cannot be NULL) 311 * 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 } 325 /* 326 * If it's an LCP, don't try to murder any NCPs, let bundle_LinkClosed() 327 * do that side of things (at a time when a call to fsm2initial() on the 328 * NCP isn't going to take charge of bringing down this link). 329 */ 330} 331 332int 333bundle_LinkIsUp(const struct bundle *bundle) 334{ 335 return bundle->ncp.ipcp.fsm.state == ST_OPENED; 336} 337 338void 339bundle_Close(struct bundle *bundle, const char *name, int how) 340{ 341 /* 342 * Please close the given datalink. 343 * If name == NULL or name is the last datalink, fsm_Close all NCPs 344 * (except our MP) 345 * If it isn't the last datalink, just Close that datalink. 346 */ 347 348 struct datalink *dl, *this_dl; 349 int others_active; 350 351 others_active = 0; 352 this_dl = NULL; 353 354 for (dl = bundle->links; dl; dl = dl->next) { 355 if (name && !strcasecmp(name, dl->name)) 356 this_dl = dl; 357 if (name == NULL || this_dl == dl) { 358 switch (how) { 359 case CLOSE_LCP: 360 datalink_DontHangup(dl); 361 /* fall through */ 362 case CLOSE_STAYDOWN: 363 datalink_StayDown(dl); 364 break; 365 } 366 } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 367 others_active++; 368 } 369 370 if (name && this_dl == NULL) { 371 log_Printf(LogWARN, "%s: Invalid datalink name\n", name); 372 return; 373 } 374 375 if (!others_active) { 376 bundle_StopIdleTimer(bundle); 377 if (bundle->ncp.ipcp.fsm.state > ST_CLOSED || 378 bundle->ncp.ipcp.fsm.state == ST_STARTING) 379 fsm_Close(&bundle->ncp.ipcp.fsm); 380 else { 381 fsm2initial(&bundle->ncp.ipcp.fsm); 382 for (dl = bundle->links; dl; dl = dl->next) 383 datalink_Close(dl, how); 384 } 385 } else if (this_dl && this_dl->state != DATALINK_CLOSED && 386 this_dl->state != DATALINK_HANGUP) 387 datalink_Close(this_dl, how); 388} 389 390void 391bundle_Down(struct bundle *bundle, int how) 392{ 393 struct datalink *dl; 394 395 for (dl = bundle->links; dl; dl = dl->next) 396 datalink_Down(dl, how); 397} 398 399static size_t 400bundle_FillQueues(struct bundle *bundle) 401{ 402 size_t total; 403 404 if (bundle->ncp.mp.active) 405 total = mp_FillQueues(bundle); 406 else { 407 struct datalink *dl; 408 size_t add; 409 410 for (total = 0, dl = bundle->links; dl; dl = dl->next) 411 if (dl->state == DATALINK_OPEN) { 412 add = link_QueueLen(&dl->physical->link); 413 if (add == 0 && dl->physical->out == NULL) 414 add = ip_PushPacket(&dl->physical->link, bundle); 415 total += add; 416 } 417 } 418 419 return total + ip_QueueLen(&bundle->ncp.ipcp); 420} 421 422static int 423bundle_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 424{ 425 struct bundle *bundle = descriptor2bundle(d); 426 struct datalink *dl; 427 int result, nlinks; 428 size_t queued; 429 430 result = 0; 431 432 /* If there are aren't many packets queued, look for some more. */ 433 for (nlinks = 0, dl = bundle->links; dl; dl = dl->next) 434 nlinks++; 435 436 if (nlinks) { 437 queued = r ? bundle_FillQueues(bundle) : ip_QueueLen(&bundle->ncp.ipcp); 438 439 if (r && (bundle->phase == PHASE_NETWORK || 440 bundle->phys_type.all & PHYS_AUTO)) { 441 /* enough surplus so that we can tell if we're getting swamped */ 442 if (queued < 30) { 443 /* Not enough - select() for more */ 444 if (bundle->choked.timer.state == TIMER_RUNNING) 445 timer_Stop(&bundle->choked.timer); /* Not needed any more */ 446 FD_SET(bundle->dev.fd, r); 447 if (*n < bundle->dev.fd + 1) 448 *n = bundle->dev.fd + 1; 449 log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd); 450 result++; 451 } else if (bundle->choked.timer.state == TIMER_STOPPED) { 452 bundle->choked.timer.func = bundle_ClearQueues; 453 bundle->choked.timer.name = "output choke"; 454 bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS; 455 bundle->choked.timer.arg = bundle; 456 timer_Start(&bundle->choked.timer); 457 } 458 } 459 } 460 461#ifndef NORADIUS 462 result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n); 463#endif 464 465 /* Which links need a select() ? */ 466 for (dl = bundle->links; dl; dl = dl->next) 467 result += descriptor_UpdateSet(&dl->desc, r, w, e, n); 468 469 /* 470 * This *MUST* be called after the datalink UpdateSet()s as it 471 * might be ``holding'' one of the datalinks (death-row) and 472 * wants to be able to de-select() it from the descriptor set. 473 */ 474 result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n); 475 476 return result; 477} 478 479static int 480bundle_IsSet(struct fdescriptor *d, const fd_set *fdset) 481{ 482 struct bundle *bundle = descriptor2bundle(d); 483 struct datalink *dl; 484 485 for (dl = bundle->links; dl; dl = dl->next) 486 if (descriptor_IsSet(&dl->desc, fdset)) 487 return 1; 488 489#ifndef NORADIUS 490 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 491 return 1; 492#endif 493 494 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 495 return 1; 496 497 return FD_ISSET(bundle->dev.fd, fdset); 498} 499 500static void 501bundle_DescriptorRead(struct fdescriptor *d, struct bundle *bundle, 502 const fd_set *fdset) 503{ 504 struct datalink *dl; 505 506 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 507 descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset); 508 509 for (dl = bundle->links; dl; dl = dl->next) 510 if (descriptor_IsSet(&dl->desc, fdset)) 511 descriptor_Read(&dl->desc, bundle, fdset); 512 513#ifndef NORADIUS 514 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 515 descriptor_Read(&bundle->radius.desc, bundle, fdset); 516#endif 517 518 if (FD_ISSET(bundle->dev.fd, fdset)) { 519 struct tun_data tun; 520 int n, pri; 521 char *data; 522 size_t sz; 523 524 if (bundle->dev.header) { 525 data = (char *)&tun; 526 sz = sizeof tun; 527 } else { 528 data = tun.data; 529 sz = sizeof tun.data; 530 } 531 532 /* something to read from tun */ 533 534 n = read(bundle->dev.fd, data, sz); 535 if (n < 0) { 536 log_Printf(LogWARN, "%s: read: %s\n", bundle->dev.Name, strerror(errno)); 537 return; 538 } 539 540 if (bundle->dev.header) { 541 n -= sz - sizeof tun.data; 542 if (n <= 0) { 543 log_Printf(LogERROR, "%s: read: Got only %d bytes of data !\n", 544 bundle->dev.Name, n); 545 return; 546 } 547 if (ntohl(tun.family) != AF_INET) 548 /* XXX: Should be maintaining drop/family counts ! */ 549 return; 550 } 551 552 if (((struct ip *)tun.data)->ip_dst.s_addr == 553 bundle->ncp.ipcp.my_ip.s_addr) { 554 /* we've been asked to send something addressed *to* us :( */ 555 if (Enabled(bundle, OPT_LOOPBACK)) { 556 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.in); 557 if (pri >= 0) { 558 n += sz - sizeof tun.data; 559 write(bundle->dev.fd, data, n); 560 log_Printf(LogDEBUG, "Looped back packet addressed to myself\n"); 561 } 562 return; 563 } else 564 log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n"); 565 } 566 567 /* 568 * Process on-demand dialup. Output packets are queued within tunnel 569 * device until IPCP is opened. 570 */ 571 572 if (bundle_Phase(bundle) == PHASE_DEAD) { 573 /* 574 * Note, we must be in AUTO mode :-/ otherwise our interface should 575 * *not* be UP and we can't receive data 576 */ 577 if ((pri = PacketCheck(bundle, tun.data, n, &bundle->filter.dial)) >= 0) 578 bundle_Open(bundle, NULL, PHYS_AUTO, 0); 579 else 580 /* 581 * Drop the packet. If we were to queue it, we'd just end up with 582 * a pile of timed-out data in our output queue by the time we get 583 * around to actually dialing. We'd also prematurely reach the 584 * threshold at which we stop select()ing to read() the tun 585 * device - breaking auto-dial. 586 */ 587 return; 588 } 589 590 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.out); 591 if (pri >= 0) 592 ip_Enqueue(&bundle->ncp.ipcp, pri, tun.data, n); 593 } 594} 595 596static int 597bundle_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle, 598 const fd_set *fdset) 599{ 600 struct datalink *dl; 601 int result = 0; 602 603 /* This is not actually necessary as struct mpserver doesn't Write() */ 604 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 605 descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset); 606 607 for (dl = bundle->links; dl; dl = dl->next) 608 if (descriptor_IsSet(&dl->desc, fdset)) 609 result += descriptor_Write(&dl->desc, bundle, fdset); 610 611 return result; 612} 613 614void 615bundle_LockTun(struct bundle *bundle) 616{ 617 FILE *lockfile; 618 char pidfile[MAXPATHLEN]; 619 620 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 621 lockfile = ID0fopen(pidfile, "w"); 622 if (lockfile != NULL) { 623 fprintf(lockfile, "%d\n", (int)getpid()); 624 fclose(lockfile); 625 } 626#ifndef RELEASE_CRUNCH 627 else 628 log_Printf(LogERROR, "Warning: Can't create %s: %s\n", 629 pidfile, strerror(errno)); 630#endif 631} 632 633static void 634bundle_UnlockTun(struct bundle *bundle) 635{ 636 char pidfile[MAXPATHLEN]; 637 638 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 639 ID0unlink(pidfile); 640} 641 642struct bundle * 643bundle_Create(const char *prefix, int type, int unit) 644{ 645 static struct bundle bundle; /* there can be only one */ 646 int enoentcount, err, minunit, maxunit; 647 const char *ifname; 648#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 649 int kldtried; 650#endif 651#if defined(TUNSIFMODE) || defined(TUNSLMODE) || defined(TUNSIFHEAD) 652 int iff; 653#endif 654 655 if (bundle.iface != NULL) { /* Already allocated ! */ 656 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n"); 657 return NULL; 658 } 659 660 if (unit == -1) { 661 minunit = 0; 662 maxunit = -1; 663 } else { 664 minunit = unit; 665 maxunit = unit + 1; 666 } 667 err = ENOENT; 668 enoentcount = 0; 669#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 670 kldtried = 0; 671#endif 672 for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) { 673 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d", 674 prefix, bundle.unit); 675 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR); 676 if (bundle.dev.fd >= 0) 677 break; 678 else if (errno == ENXIO) { 679#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 680 if (bundle.unit == minunit && !kldtried++) { 681 /* 682 * Attempt to load the tunnel interface KLD if it isn't loaded 683 * already. 684 */ 685 if (modfind("if_tun") == -1) { 686 if (ID0kldload("if_tun") != -1) { 687 bundle.unit--; 688 continue; 689 } 690 log_Printf(LogWARN, "kldload: if_tun: %s\n", strerror(errno)); 691 } 692 } 693#endif 694 err = errno; 695 break; 696 } else if (errno == ENOENT) { 697 if (++enoentcount > 2) 698 break; 699 } else 700 err = errno; 701 } 702 703 if (bundle.dev.fd < 0) { 704 if (unit == -1) 705 log_Printf(LogWARN, "No available tunnel devices found (%s)\n", 706 strerror(err)); 707 else 708 log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err)); 709 return NULL; 710 } 711 712 log_SetTun(bundle.unit); 713 714 ifname = strrchr(bundle.dev.Name, '/'); 715 if (ifname == NULL) 716 ifname = bundle.dev.Name; 717 else 718 ifname++; 719 720 bundle.iface = iface_Create(ifname); 721 if (bundle.iface == NULL) { 722 close(bundle.dev.fd); 723 return NULL; 724 } 725 726#ifdef TUNSIFMODE 727 /* Make sure we're POINTOPOINT */ 728 iff = IFF_POINTOPOINT; 729 if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0) 730 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n", 731 strerror(errno)); 732#endif 733 734#ifdef TUNSLMODE 735 /* Make sure we're not prepending sockaddrs */ 736 iff = 0; 737 if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0) 738 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n", 739 strerror(errno)); 740#endif 741 742#ifdef TUNSIFHEAD 743 /* We want the address family please ! */ 744 iff = 1; 745 if (ID0ioctl(bundle.dev.fd, TUNSIFHEAD, &iff) < 0) { 746 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFHEAD): %s\n", 747 strerror(errno)); 748 bundle.dev.header = 0; 749 } else 750 bundle.dev.header = 1; 751#else 752#ifdef __OpenBSD__ 753 /* Always present for OpenBSD */ 754 bundle.dev.header = 1; 755#else 756 /* 757 * If TUNSIFHEAD isn't available and we're not OpenBSD, assume 758 * everything's AF_INET (hopefully the tun device won't pass us 759 * anything else !). 760 */ 761 bundle.dev.header = 0; 762#endif 763#endif 764 765 if (!iface_SetFlags(bundle.iface, IFF_UP)) { 766 iface_Destroy(bundle.iface); 767 bundle.iface = NULL; 768 close(bundle.dev.fd); 769 return NULL; 770 } 771 772 log_Printf(LogPHASE, "Using interface: %s\n", ifname); 773 774 bundle.bandwidth = 0; 775 bundle.routing_seq = 0; 776 bundle.phase = PHASE_DEAD; 777 bundle.CleaningUp = 0; 778 bundle.NatEnabled = 0; 779 780 bundle.fsm.LayerStart = bundle_LayerStart; 781 bundle.fsm.LayerUp = bundle_LayerUp; 782 bundle.fsm.LayerDown = bundle_LayerDown; 783 bundle.fsm.LayerFinish = bundle_LayerFinish; 784 bundle.fsm.object = &bundle; 785 786 bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT; 787 bundle.cfg.idle.min_timeout = 0; 788 *bundle.cfg.auth.name = '\0'; 789 *bundle.cfg.auth.key = '\0'; 790 bundle.cfg.opt = OPT_SROUTES | OPT_IDCHECK | OPT_LOOPBACK | 791 OPT_THROUGHPUT | OPT_UTMP; 792 *bundle.cfg.label = '\0'; 793 bundle.cfg.mtu = DEF_MTU; 794 bundle.cfg.choked.timeout = CHOKED_TIMEOUT; 795 bundle.phys_type.all = type; 796 bundle.phys_type.open = 0; 797 bundle.upat = 0; 798 799 bundle.links = datalink_Create("deflink", &bundle, type); 800 if (bundle.links == NULL) { 801 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno)); 802 iface_Destroy(bundle.iface); 803 bundle.iface = NULL; 804 close(bundle.dev.fd); 805 return NULL; 806 } 807 808 bundle.desc.type = BUNDLE_DESCRIPTOR; 809 bundle.desc.UpdateSet = bundle_UpdateSet; 810 bundle.desc.IsSet = bundle_IsSet; 811 bundle.desc.Read = bundle_DescriptorRead; 812 bundle.desc.Write = bundle_DescriptorWrite; 813 814 mp_Init(&bundle.ncp.mp, &bundle); 815 816 /* Send over the first physical link by default */ 817 ipcp_Init(&bundle.ncp.ipcp, &bundle, &bundle.links->physical->link, 818 &bundle.fsm); 819 820 memset(&bundle.filter, '\0', sizeof bundle.filter); 821 bundle.filter.in.fragok = bundle.filter.in.logok = 1; 822 bundle.filter.in.name = "IN"; 823 bundle.filter.out.fragok = bundle.filter.out.logok = 1; 824 bundle.filter.out.name = "OUT"; 825 bundle.filter.dial.name = "DIAL"; 826 bundle.filter.dial.logok = 1; 827 bundle.filter.alive.name = "ALIVE"; 828 bundle.filter.alive.logok = 1; 829 { 830 int i; 831 for (i = 0; i < MAXFILTERS; i++) { 832 bundle.filter.in.rule[i].f_action = A_NONE; 833 bundle.filter.out.rule[i].f_action = A_NONE; 834 bundle.filter.dial.rule[i].f_action = A_NONE; 835 bundle.filter.alive.rule[i].f_action = A_NONE; 836 } 837 } 838 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer); 839 bundle.idle.done = 0; 840 bundle.notify.fd = -1; 841 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer); 842#ifndef NORADIUS 843 radius_Init(&bundle.radius); 844#endif 845 846 /* Clean out any leftover crud */ 847 iface_Clear(bundle.iface, IFACE_CLEAR_ALL); 848 849 bundle_LockTun(&bundle); 850 851 return &bundle; 852} 853 854static void 855bundle_DownInterface(struct bundle *bundle) 856{ 857 route_IfDelete(bundle, 1); 858 iface_ClearFlags(bundle->iface, IFF_UP); 859} 860 861void 862bundle_Destroy(struct bundle *bundle) 863{ 864 struct datalink *dl; 865 866 /* 867 * Clean up the interface. We don't need to timer_Stop()s, mp_Down(), 868 * ipcp_CleanInterface() and bundle_DownInterface() unless we're getting 869 * out under exceptional conditions such as a descriptor exception. 870 */ 871 timer_Stop(&bundle->idle.timer); 872 timer_Stop(&bundle->choked.timer); 873 mp_Down(&bundle->ncp.mp); 874 ipcp_CleanInterface(&bundle->ncp.ipcp); 875 bundle_DownInterface(bundle); 876 877#ifndef NORADIUS 878 /* Tell the radius server the bad news */ 879 radius_Destroy(&bundle->radius); 880#endif 881 882 /* Again, these are all DATALINK_CLOSED unless we're abending */ 883 dl = bundle->links; 884 while (dl) 885 dl = datalink_Destroy(dl); 886 887 ipcp_Destroy(&bundle->ncp.ipcp); 888 889 close(bundle->dev.fd); 890 bundle_UnlockTun(bundle); 891 892 /* In case we never made PHASE_NETWORK */ 893 bundle_Notify(bundle, EX_ERRDEAD); 894 895 iface_Destroy(bundle->iface); 896 bundle->iface = NULL; 897} 898 899struct rtmsg { 900 struct rt_msghdr m_rtm; 901 char m_space[64]; 902}; 903 904int 905bundle_SetRoute(struct bundle *bundle, int cmd, struct in_addr dst, 906 struct in_addr gateway, struct in_addr mask, int bang, int ssh) 907{ 908 struct rtmsg rtmes; 909 int s, nb, wb; 910 char *cp; 911 const char *cmdstr; 912 struct sockaddr_in rtdata; 913 int result = 1; 914 915 if (bang) 916 cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!"); 917 else 918 cmdstr = (cmd == RTM_ADD ? "Add" : "Delete"); 919 s = ID0socket(PF_ROUTE, SOCK_RAW, 0); 920 if (s < 0) { 921 log_Printf(LogERROR, "bundle_SetRoute: socket(): %s\n", strerror(errno)); 922 return result; 923 } 924 memset(&rtmes, '\0', sizeof rtmes); 925 rtmes.m_rtm.rtm_version = RTM_VERSION; 926 rtmes.m_rtm.rtm_type = cmd; 927 rtmes.m_rtm.rtm_addrs = RTA_DST; 928 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; 929 rtmes.m_rtm.rtm_pid = getpid(); 930 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 931 932 if (cmd == RTM_ADD || cmd == RTM_CHANGE) { 933 if (bundle->ncp.ipcp.cfg.sendpipe > 0) { 934 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.ipcp.cfg.sendpipe; 935 rtmes.m_rtm.rtm_inits |= RTV_SPIPE; 936 } 937 if (bundle->ncp.ipcp.cfg.recvpipe > 0) { 938 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.ipcp.cfg.recvpipe; 939 rtmes.m_rtm.rtm_inits |= RTV_RPIPE; 940 } 941 } 942 943 memset(&rtdata, '\0', sizeof rtdata); 944 rtdata.sin_len = sizeof rtdata; 945 rtdata.sin_family = AF_INET; 946 rtdata.sin_port = 0; 947 rtdata.sin_addr = dst; 948 949 cp = rtmes.m_space; 950 memcpy(cp, &rtdata, rtdata.sin_len); 951 cp += rtdata.sin_len; 952 if (cmd == RTM_ADD) { 953 if (gateway.s_addr == INADDR_ANY) { 954 if (!ssh) 955 log_Printf(LogERROR, "bundle_SetRoute: Cannot add a route with" 956 " destination 0.0.0.0\n"); 957 close(s); 958 return result; 959 } else { 960 rtdata.sin_addr = gateway; 961 memcpy(cp, &rtdata, rtdata.sin_len); 962 cp += rtdata.sin_len; 963 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; 964 } 965 } 966 967 if (dst.s_addr == INADDR_ANY) 968 mask.s_addr = INADDR_ANY; 969 970 if (cmd == RTM_ADD || dst.s_addr == INADDR_ANY) { 971 rtdata.sin_addr = mask; 972 memcpy(cp, &rtdata, rtdata.sin_len); 973 cp += rtdata.sin_len; 974 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; 975 } 976 977 nb = cp - (char *) &rtmes; 978 rtmes.m_rtm.rtm_msglen = nb; 979 wb = ID0write(s, &rtmes, nb); 980 if (wb < 0) { 981 log_Printf(LogTCPIP, "bundle_SetRoute failure:\n"); 982 log_Printf(LogTCPIP, "bundle_SetRoute: Cmd = %s\n", cmdstr); 983 log_Printf(LogTCPIP, "bundle_SetRoute: Dst = %s\n", inet_ntoa(dst)); 984 log_Printf(LogTCPIP, "bundle_SetRoute: Gateway = %s\n", 985 inet_ntoa(gateway)); 986 log_Printf(LogTCPIP, "bundle_SetRoute: Mask = %s\n", inet_ntoa(mask)); 987failed: 988 if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST || 989 (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) { 990 if (!bang) { 991 log_Printf(LogWARN, "Add route failed: %s already exists\n", 992 dst.s_addr == 0 ? "default" : inet_ntoa(dst)); 993 result = 0; /* Don't add to our dynamic list */ 994 } else { 995 rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE; 996 if ((wb = ID0write(s, &rtmes, nb)) < 0) 997 goto failed; 998 } 999 } else if (cmd == RTM_DELETE && 1000 (rtmes.m_rtm.rtm_errno == ESRCH || 1001 (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) { 1002 if (!bang) 1003 log_Printf(LogWARN, "Del route failed: %s: Non-existent\n", 1004 inet_ntoa(dst)); 1005 } else if (rtmes.m_rtm.rtm_errno == 0) { 1006 if (!ssh || errno != ENETUNREACH) 1007 log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr, 1008 inet_ntoa(dst), strerror(errno)); 1009 } else 1010 log_Printf(LogWARN, "%s route failed: %s: %s\n", 1011 cmdstr, inet_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno)); 1012 } 1013 log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %x, gateway = %x\n", 1014 wb, cmdstr, (unsigned)dst.s_addr, (unsigned)gateway.s_addr); 1015 close(s); 1016 1017 return result; 1018} 1019 1020void 1021bundle_LinkClosed(struct bundle *bundle, struct datalink *dl) 1022{ 1023 /* 1024 * Our datalink has closed. 1025 * CleanDatalinks() (called from DoLoop()) will remove closed 1026 * BACKGROUND, FOREGROUND and DIRECT links. 1027 * If it's the last data link, enter phase DEAD. 1028 * 1029 * NOTE: dl may not be in our list (bundle_SendDatalink()) ! 1030 */ 1031 1032 struct datalink *odl; 1033 int other_links; 1034 1035 log_SetTtyCommandMode(dl); 1036 1037 other_links = 0; 1038 for (odl = bundle->links; odl; odl = odl->next) 1039 if (odl != dl && odl->state != DATALINK_CLOSED) 1040 other_links++; 1041 1042 if (!other_links) { 1043 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */ 1044 bundle_DownInterface(bundle); 1045 fsm2initial(&bundle->ncp.ipcp.fsm); 1046 bundle_NewPhase(bundle, PHASE_DEAD); 1047 bundle_StopIdleTimer(bundle); 1048 } 1049} 1050 1051void 1052bundle_Open(struct bundle *bundle, const char *name, int mask, int force) 1053{ 1054 /* 1055 * Please open the given datalink, or all if name == NULL 1056 */ 1057 struct datalink *dl; 1058 1059 for (dl = bundle->links; dl; dl = dl->next) 1060 if (name == NULL || !strcasecmp(dl->name, name)) { 1061 if ((mask & dl->physical->type) && 1062 (dl->state == DATALINK_CLOSED || 1063 (force && dl->state == DATALINK_OPENING && 1064 dl->dial.timer.state == TIMER_RUNNING))) { 1065 if (force) /* Ignore redial timeout ? */ 1066 timer_Stop(&dl->dial.timer); 1067 datalink_Up(dl, 1, 1); 1068 if (mask & PHYS_AUTO) 1069 /* Only one AUTO link at a time */ 1070 break; 1071 } 1072 if (name != NULL) 1073 break; 1074 } 1075} 1076 1077struct datalink * 1078bundle2datalink(struct bundle *bundle, const char *name) 1079{ 1080 struct datalink *dl; 1081 1082 if (name != NULL) { 1083 for (dl = bundle->links; dl; dl = dl->next) 1084 if (!strcasecmp(dl->name, name)) 1085 return dl; 1086 } else if (bundle->links && !bundle->links->next) 1087 return bundle->links; 1088 1089 return NULL; 1090} 1091 1092int 1093bundle_ShowLinks(struct cmdargs const *arg) 1094{ 1095 struct datalink *dl; 1096 struct pppThroughput *t; 1097 int secs; 1098 1099 for (dl = arg->bundle->links; dl; dl = dl->next) { 1100 prompt_Printf(arg->prompt, "Name: %s [%s, %s]", 1101 dl->name, mode2Nam(dl->physical->type), datalink_State(dl)); 1102 if (dl->physical->link.throughput.rolling && dl->state == DATALINK_OPEN) 1103 prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)", 1104 dl->mp.bandwidth ? dl->mp.bandwidth : 1105 physical_GetSpeed(dl->physical), 1106 dl->physical->link.throughput.OctetsPerSecond * 8, 1107 dl->physical->link.throughput.OctetsPerSecond); 1108 prompt_Printf(arg->prompt, "\n"); 1109 } 1110 1111 t = &arg->bundle->ncp.mp.link.throughput; 1112 secs = t->downtime ? 0 : throughput_uptime(t); 1113 if (secs > t->SamplePeriod) 1114 secs = t->SamplePeriod; 1115 if (secs) 1116 prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)" 1117 " over the last %d secs\n", t->OctetsPerSecond * 8, 1118 t->OctetsPerSecond, secs); 1119 1120 return 0; 1121} 1122 1123static const char * 1124optval(struct bundle *bundle, int bit) 1125{ 1126 return (bundle->cfg.opt & bit) ? "enabled" : "disabled"; 1127} 1128 1129int 1130bundle_ShowStatus(struct cmdargs const *arg) 1131{ 1132 int remaining; 1133 1134 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle)); 1135 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name); 1136 prompt_Printf(arg->prompt, " Interface: %s @ %lubps", 1137 arg->bundle->iface->name, arg->bundle->bandwidth); 1138 1139 if (arg->bundle->upat) { 1140 int secs = time(NULL) - arg->bundle->upat; 1141 1142 prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600, 1143 (secs / 60) % 60, secs % 60); 1144 } 1145 1146 prompt_Printf(arg->prompt, "\n\nDefaults:\n"); 1147 prompt_Printf(arg->prompt, " Label: %s\n", arg->bundle->cfg.label); 1148 prompt_Printf(arg->prompt, " Auth name: %s\n", 1149 arg->bundle->cfg.auth.name); 1150 1151 prompt_Printf(arg->prompt, " Choked Timer: %ds\n", 1152 arg->bundle->cfg.choked.timeout); 1153 1154#ifndef NORADIUS 1155 radius_Show(&arg->bundle->radius, arg->prompt); 1156#endif 1157 1158 prompt_Printf(arg->prompt, " Idle Timer: "); 1159 if (arg->bundle->cfg.idle.timeout) { 1160 prompt_Printf(arg->prompt, "%ds", arg->bundle->cfg.idle.timeout); 1161 if (arg->bundle->cfg.idle.min_timeout) 1162 prompt_Printf(arg->prompt, ", min %ds", 1163 arg->bundle->cfg.idle.min_timeout); 1164 remaining = bundle_RemainingIdleTime(arg->bundle); 1165 if (remaining != -1) 1166 prompt_Printf(arg->prompt, " (%ds remaining)", remaining); 1167 prompt_Printf(arg->prompt, "\n"); 1168 } else 1169 prompt_Printf(arg->prompt, "disabled\n"); 1170 prompt_Printf(arg->prompt, " MTU: "); 1171 if (arg->bundle->cfg.mtu) 1172 prompt_Printf(arg->prompt, "%d\n", arg->bundle->cfg.mtu); 1173 else 1174 prompt_Printf(arg->prompt, "unspecified\n"); 1175 1176 prompt_Printf(arg->prompt, " sendpipe: "); 1177 if (arg->bundle->ncp.ipcp.cfg.sendpipe > 0) 1178 prompt_Printf(arg->prompt, "%-20ld", arg->bundle->ncp.ipcp.cfg.sendpipe); 1179 else 1180 prompt_Printf(arg->prompt, "unspecified "); 1181 prompt_Printf(arg->prompt, " recvpipe: "); 1182 if (arg->bundle->ncp.ipcp.cfg.recvpipe > 0) 1183 prompt_Printf(arg->prompt, "%ld\n", arg->bundle->ncp.ipcp.cfg.recvpipe); 1184 else 1185 prompt_Printf(arg->prompt, "unspecified\n"); 1186 1187 prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s", 1188 optval(arg->bundle, OPT_SROUTES)); 1189 prompt_Printf(arg->prompt, " ID check: %s\n", 1190 optval(arg->bundle, OPT_IDCHECK)); 1191 prompt_Printf(arg->prompt, " Keep-Session: %-20.20s", 1192 optval(arg->bundle, OPT_KEEPSESSION)); 1193 prompt_Printf(arg->prompt, " Loopback: %s\n", 1194 optval(arg->bundle, OPT_LOOPBACK)); 1195 prompt_Printf(arg->prompt, " PasswdAuth: %-20.20s", 1196 optval(arg->bundle, OPT_PASSWDAUTH)); 1197 prompt_Printf(arg->prompt, " Proxy: %s\n", 1198 optval(arg->bundle, OPT_PROXY)); 1199 prompt_Printf(arg->prompt, " Proxyall: %-20.20s", 1200 optval(arg->bundle, OPT_PROXYALL)); 1201 prompt_Printf(arg->prompt, " Throughput: %s\n", 1202 optval(arg->bundle, OPT_THROUGHPUT)); 1203 prompt_Printf(arg->prompt, " Utmp Logging: %-20.20s", 1204 optval(arg->bundle, OPT_UTMP)); 1205 prompt_Printf(arg->prompt, " Iface-Alias: %s\n", 1206 optval(arg->bundle, OPT_IFACEALIAS)); 1207 1208 return 0; 1209} 1210 1211static void 1212bundle_IdleTimeout(void *v) 1213{ 1214 struct bundle *bundle = (struct bundle *)v; 1215 1216 log_Printf(LogPHASE, "Idle timer expired.\n"); 1217 bundle_StopIdleTimer(bundle); 1218 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1219} 1220 1221/* 1222 * Start Idle timer. If timeout is reached, we call bundle_Close() to 1223 * close LCP and link. 1224 */ 1225void 1226bundle_StartIdleTimer(struct bundle *bundle) 1227{ 1228 timer_Stop(&bundle->idle.timer); 1229 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1230 bundle->phys_type.open && bundle->cfg.idle.timeout) { 1231 int secs; 1232 1233 secs = bundle->cfg.idle.timeout; 1234 if (bundle->cfg.idle.min_timeout > secs && bundle->upat) { 1235 int up = time(NULL) - bundle->upat; 1236 1237 if ((long long)bundle->cfg.idle.min_timeout - up > (long long)secs) 1238 secs = bundle->cfg.idle.min_timeout - up; 1239 } 1240 bundle->idle.timer.func = bundle_IdleTimeout; 1241 bundle->idle.timer.name = "idle"; 1242 bundle->idle.timer.load = secs * SECTICKS; 1243 bundle->idle.timer.arg = bundle; 1244 timer_Start(&bundle->idle.timer); 1245 bundle->idle.done = time(NULL) + secs; 1246 } 1247} 1248 1249void 1250bundle_SetIdleTimer(struct bundle *bundle, int timeout, int min_timeout) 1251{ 1252 bundle->cfg.idle.timeout = timeout; 1253 if (min_timeout >= 0) 1254 bundle->cfg.idle.min_timeout = min_timeout; 1255 if (bundle_LinkIsUp(bundle)) 1256 bundle_StartIdleTimer(bundle); 1257} 1258 1259void 1260bundle_StopIdleTimer(struct bundle *bundle) 1261{ 1262 timer_Stop(&bundle->idle.timer); 1263 bundle->idle.done = 0; 1264} 1265 1266static int 1267bundle_RemainingIdleTime(struct bundle *bundle) 1268{ 1269 if (bundle->idle.done) 1270 return bundle->idle.done - time(NULL); 1271 return -1; 1272} 1273 1274int 1275bundle_IsDead(struct bundle *bundle) 1276{ 1277 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp); 1278} 1279 1280static struct datalink * 1281bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl) 1282{ 1283 struct datalink **dlp; 1284 1285 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next) 1286 if (*dlp == dl) { 1287 *dlp = dl->next; 1288 dl->next = NULL; 1289 bundle_LinksRemoved(bundle); 1290 return dl; 1291 } 1292 1293 return NULL; 1294} 1295 1296static void 1297bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl) 1298{ 1299 struct datalink **dlp = &bundle->links; 1300 1301 while (*dlp) 1302 dlp = &(*dlp)->next; 1303 1304 *dlp = dl; 1305 dl->next = NULL; 1306 1307 bundle_LinkAdded(bundle, dl); 1308 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1309} 1310 1311void 1312bundle_CleanDatalinks(struct bundle *bundle) 1313{ 1314 struct datalink **dlp = &bundle->links; 1315 int found = 0; 1316 1317 while (*dlp) 1318 if ((*dlp)->state == DATALINK_CLOSED && 1319 (*dlp)->physical->type & 1320 (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) { 1321 *dlp = datalink_Destroy(*dlp); 1322 found++; 1323 } else 1324 dlp = &(*dlp)->next; 1325 1326 if (found) 1327 bundle_LinksRemoved(bundle); 1328} 1329 1330int 1331bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl, 1332 const char *name) 1333{ 1334 if (bundle2datalink(bundle, name)) { 1335 log_Printf(LogWARN, "Clone: %s: name already exists\n", name); 1336 return 0; 1337 } 1338 1339 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name)); 1340 return 1; 1341} 1342 1343void 1344bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl) 1345{ 1346 dl = bundle_DatalinkLinkout(bundle, dl); 1347 if (dl) 1348 datalink_Destroy(dl); 1349} 1350 1351void 1352bundle_SetLabel(struct bundle *bundle, const char *label) 1353{ 1354 if (label) 1355 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1); 1356 else 1357 *bundle->cfg.label = '\0'; 1358} 1359 1360const char * 1361bundle_GetLabel(struct bundle *bundle) 1362{ 1363 return *bundle->cfg.label ? bundle->cfg.label : NULL; 1364} 1365 1366int 1367bundle_LinkSize() 1368{ 1369 struct iovec iov[SCATTER_SEGMENTS]; 1370 int niov, expect, f; 1371 1372 iov[0].iov_len = strlen(Version) + 1; 1373 iov[0].iov_base = NULL; 1374 niov = 1; 1375 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1376 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1377 return 0; 1378 } 1379 1380 for (f = expect = 0; f < niov; f++) 1381 expect += iov[f].iov_len; 1382 1383 return expect; 1384} 1385 1386void 1387bundle_ReceiveDatalink(struct bundle *bundle, int s) 1388{ 1389 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1390 int niov, expect, f, *fd, nfd, onfd, got; 1391 struct iovec iov[SCATTER_SEGMENTS]; 1392 struct cmsghdr *cmsg; 1393 struct msghdr msg; 1394 struct datalink *dl; 1395 pid_t pid; 1396 1397 log_Printf(LogPHASE, "Receiving datalink\n"); 1398 1399 /* 1400 * Create our scatter/gather array - passing NULL gets the space 1401 * allocation requirement rather than actually flattening the 1402 * structures. 1403 */ 1404 iov[0].iov_len = strlen(Version) + 1; 1405 iov[0].iov_base = NULL; 1406 niov = 1; 1407 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1408 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1409 return; 1410 } 1411 1412 /* Allocate the scatter/gather array for recvmsg() */ 1413 for (f = expect = 0; f < niov; f++) { 1414 if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) { 1415 log_Printf(LogERROR, "Cannot allocate space to receive link\n"); 1416 return; 1417 } 1418 if (f) 1419 expect += iov[f].iov_len; 1420 } 1421 1422 /* Set up our message */ 1423 cmsg = (struct cmsghdr *)cmsgbuf; 1424 cmsg->cmsg_len = sizeof cmsgbuf; 1425 cmsg->cmsg_level = SOL_SOCKET; 1426 cmsg->cmsg_type = 0; 1427 1428 memset(&msg, '\0', sizeof msg); 1429 msg.msg_name = NULL; 1430 msg.msg_namelen = 0; 1431 msg.msg_iov = iov; 1432 msg.msg_iovlen = 1; /* Only send the version at the first pass */ 1433 msg.msg_control = cmsgbuf; 1434 msg.msg_controllen = sizeof cmsgbuf; 1435 1436 log_Printf(LogDEBUG, "Expecting %u scatter/gather bytes\n", 1437 (unsigned)iov[0].iov_len); 1438 1439 if ((got = recvmsg(s, &msg, MSG_WAITALL)) != iov[0].iov_len) { 1440 if (got == -1) 1441 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); 1442 else 1443 log_Printf(LogERROR, "Failed recvmsg: Got %d, not %u\n", 1444 got, (unsigned)iov[0].iov_len); 1445 while (niov--) 1446 free(iov[niov].iov_base); 1447 return; 1448 } 1449 1450 if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { 1451 log_Printf(LogERROR, "Recvmsg: no descriptors received !\n"); 1452 while (niov--) 1453 free(iov[niov].iov_base); 1454 return; 1455 } 1456 1457 fd = (int *)(cmsg + 1); 1458 nfd = (cmsg->cmsg_len - sizeof *cmsg) / sizeof(int); 1459 1460 if (nfd < 2) { 1461 log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n", 1462 nfd, nfd == 1 ? "" : "s"); 1463 while (nfd--) 1464 close(fd[nfd]); 1465 while (niov--) 1466 free(iov[niov].iov_base); 1467 return; 1468 } 1469 1470 /* 1471 * We've successfully received two or more open file descriptors 1472 * through our socket, plus a version string. Make sure it's the 1473 * correct version, and drop the connection if it's not. 1474 */ 1475 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) { 1476 log_Printf(LogWARN, "Cannot receive datalink, incorrect version" 1477 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len, 1478 (char *)iov[0].iov_base, Version); 1479 while (nfd--) 1480 close(fd[nfd]); 1481 while (niov--) 1482 free(iov[niov].iov_base); 1483 return; 1484 } 1485 1486 /* 1487 * Everything looks good. Send the other side our process id so that 1488 * they can transfer lock ownership, and wait for them to send the 1489 * actual link data. 1490 */ 1491 pid = getpid(); 1492 if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) { 1493 if (got == -1) 1494 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1495 else 1496 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, 1497 (int)(sizeof pid)); 1498 while (nfd--) 1499 close(fd[nfd]); 1500 while (niov--) 1501 free(iov[niov].iov_base); 1502 return; 1503 } 1504 1505 if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) { 1506 if (got == -1) 1507 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1508 else 1509 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, expect); 1510 while (nfd--) 1511 close(fd[nfd]); 1512 while (niov--) 1513 free(iov[niov].iov_base); 1514 return; 1515 } 1516 close(fd[1]); 1517 1518 onfd = nfd; /* We've got this many in our array */ 1519 nfd -= 2; /* Don't include p->fd and our reply descriptor */ 1520 niov = 1; /* Skip the version id */ 1521 dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, fd[0], 1522 fd + 2, &nfd); 1523 if (dl) { 1524 1525 if (nfd) { 1526 log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d " 1527 "auxiliary file descriptors (%d remain)\n", onfd, nfd); 1528 datalink_Destroy(dl); 1529 while (nfd--) 1530 close(fd[onfd--]); 1531 close(fd[0]); 1532 } else { 1533 bundle_DatalinkLinkin(bundle, dl); 1534 datalink_AuthOk(dl); 1535 bundle_CalculateBandwidth(dl->bundle); 1536 } 1537 } else { 1538 while (nfd--) 1539 close(fd[onfd--]); 1540 close(fd[0]); 1541 close(fd[1]); 1542 } 1543 1544 free(iov[0].iov_base); 1545} 1546 1547void 1548bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun) 1549{ 1550 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1551 const char *constlock; 1552 char *lock; 1553 struct cmsghdr *cmsg; 1554 struct msghdr msg; 1555 struct iovec iov[SCATTER_SEGMENTS]; 1556 int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2], got; 1557 pid_t newpid; 1558 1559 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name); 1560 1561 /* Record the base device name for a lock transfer later */ 1562 constlock = physical_LockedDevice(dl->physical); 1563 if (constlock) { 1564 lock = alloca(strlen(constlock) + 1); 1565 strcpy(lock, constlock); 1566 } else 1567 lock = NULL; 1568 1569 bundle_LinkClosed(dl->bundle, dl); 1570 bundle_DatalinkLinkout(dl->bundle, dl); 1571 1572 /* Build our scatter/gather array */ 1573 iov[0].iov_len = strlen(Version) + 1; 1574 iov[0].iov_base = strdup(Version); 1575 niov = 1; 1576 nfd = 0; 1577 1578 fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd); 1579 1580 if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) { 1581 /* 1582 * fd[1] is used to get the peer process id back, then to confirm that 1583 * we've transferred any device locks to that process id. 1584 */ 1585 fd[1] = reply[1]; 1586 1587 nfd += 2; /* Include fd[0] and fd[1] */ 1588 memset(&msg, '\0', sizeof msg); 1589 1590 msg.msg_name = NULL; 1591 msg.msg_namelen = 0; 1592 /* 1593 * Only send the version to start... We used to send the whole lot, but 1594 * this caused problems with our RECVBUF size as a single link is about 1595 * 22k ! This way, we should bump into no limits. 1596 */ 1597 msg.msg_iovlen = 1; 1598 msg.msg_iov = iov; 1599 msg.msg_control = cmsgbuf; 1600 msg.msg_controllen = sizeof *cmsg + sizeof(int) * nfd; 1601 msg.msg_flags = 0; 1602 1603 cmsg = (struct cmsghdr *)cmsgbuf; 1604 cmsg->cmsg_len = msg.msg_controllen; 1605 cmsg->cmsg_level = SOL_SOCKET; 1606 cmsg->cmsg_type = SCM_RIGHTS; 1607 1608 for (f = 0; f < nfd; f++) 1609 *((int *)(cmsg + 1) + f) = fd[f]; 1610 1611 for (f = 1, expect = 0; f < niov; f++) 1612 expect += iov[f].iov_len; 1613 1614 if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1) 1615 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1616 strerror(errno)); 1617 if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1) 1618 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1619 strerror(errno)); 1620 1621 log_Printf(LogDEBUG, "Sending %d descriptor%s and %u bytes in scatter" 1622 "/gather array\n", nfd, nfd == 1 ? "" : "s", 1623 (unsigned)iov[0].iov_len); 1624 1625 if ((got = sendmsg(s, &msg, 0)) == -1) 1626 log_Printf(LogERROR, "Failed sendmsg: %s: %s\n", 1627 sun->sun_path, strerror(errno)); 1628 else if (got != iov[0].iov_len) 1629 log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %d of %u\n", 1630 sun->sun_path, got, (unsigned)iov[0].iov_len); 1631 else { 1632 /* We must get the ACK before closing the descriptor ! */ 1633 int res; 1634 1635 if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) { 1636 log_Printf(LogDEBUG, "Received confirmation from pid %d\n", 1637 (int)newpid); 1638 if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK) 1639 log_Printf(LogPHASE, "uu_lock_txfr: %s\n", uu_lockerr(res)); 1640 1641 log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect); 1642 if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) { 1643 if (got == -1) 1644 log_Printf(LogERROR, "%s: Failed writev: %s\n", 1645 sun->sun_path, strerror(errno)); 1646 else 1647 log_Printf(LogERROR, "%s: Failed writev: Wrote %d of %d\n", 1648 sun->sun_path, got, expect); 1649 } 1650 } else if (got == -1) 1651 log_Printf(LogERROR, "%s: Failed socketpair read: %s\n", 1652 sun->sun_path, strerror(errno)); 1653 else 1654 log_Printf(LogERROR, "%s: Failed socketpair read: Got %d of %d\n", 1655 sun->sun_path, got, (int)(sizeof newpid)); 1656 } 1657 1658 close(reply[0]); 1659 close(reply[1]); 1660 1661 newsid = Enabled(dl->bundle, OPT_KEEPSESSION) || 1662 tcgetpgrp(fd[0]) == getpgrp(); 1663 while (nfd) 1664 close(fd[--nfd]); 1665 if (newsid) 1666 bundle_setsid(dl->bundle, got != -1); 1667 } 1668 close(s); 1669 1670 while (niov--) 1671 free(iov[niov].iov_base); 1672} 1673 1674int 1675bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl, 1676 const char *name) 1677{ 1678 struct datalink *dl; 1679 1680 if (!strcasecmp(ndl->name, name)) 1681 return 1; 1682 1683 for (dl = bundle->links; dl; dl = dl->next) 1684 if (!strcasecmp(dl->name, name)) 1685 return 0; 1686 1687 datalink_Rename(ndl, name); 1688 return 1; 1689} 1690 1691int 1692bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode) 1693{ 1694 int omode; 1695 1696 omode = dl->physical->type; 1697 if (omode == mode) 1698 return 1; 1699 1700 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO)) 1701 /* First auto link */ 1702 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) { 1703 log_Printf(LogWARN, "You must `set ifaddr' or `open' before" 1704 " changing mode to %s\n", mode2Nam(mode)); 1705 return 0; 1706 } 1707 1708 if (!datalink_SetMode(dl, mode)) 1709 return 0; 1710 1711 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) && 1712 bundle->phase != PHASE_NETWORK) 1713 /* First auto link, we need an interface */ 1714 ipcp_InterfaceUp(&bundle->ncp.ipcp); 1715 1716 /* Regenerate phys_type and adjust idle timer */ 1717 bundle_LinksRemoved(bundle); 1718 1719 return 1; 1720} 1721 1722void 1723bundle_setsid(struct bundle *bundle, int holdsession) 1724{ 1725 /* 1726 * Lose the current session. This means getting rid of our pid 1727 * too so that the tty device will really go away, and any getty 1728 * etc will be allowed to restart. 1729 */ 1730 pid_t pid, orig; 1731 int fds[2]; 1732 char done; 1733 struct datalink *dl; 1734 1735 if (!holdsession && bundle_IsDead(bundle)) { 1736 /* 1737 * No need to lose our session after all... we're going away anyway 1738 * 1739 * We should really stop the timer and pause if holdsession is set and 1740 * the bundle's dead, but that leaves other resources lying about :-( 1741 */ 1742 return; 1743 } 1744 1745 orig = getpid(); 1746 if (pipe(fds) == -1) { 1747 log_Printf(LogERROR, "pipe: %s\n", strerror(errno)); 1748 return; 1749 } 1750 switch ((pid = fork())) { 1751 case -1: 1752 log_Printf(LogERROR, "fork: %s\n", strerror(errno)); 1753 close(fds[0]); 1754 close(fds[1]); 1755 return; 1756 case 0: 1757 close(fds[1]); 1758 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1759 close(fds[0]); 1760 if (pipe(fds) == -1) { 1761 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno)); 1762 return; 1763 } 1764 switch ((pid = fork())) { 1765 case -1: 1766 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno)); 1767 close(fds[0]); 1768 close(fds[1]); 1769 return; 1770 case 0: 1771 close(fds[1]); 1772 bundle_LockTun(bundle); /* update pid */ 1773 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1774 close(fds[0]); 1775 setsid(); 1776 bundle_ChangedPID(bundle); 1777 log_Printf(LogPHASE, "%d -> %d: %s session control\n", 1778 (int)orig, (int)getpid(), 1779 holdsession ? "Passed" : "Dropped"); 1780 timer_InitService(0); /* Start the Timer Service */ 1781 break; 1782 default: 1783 close(fds[0]); 1784 /* Give away all our physical locks (to the final process) */ 1785 for (dl = bundle->links; dl; dl = dl->next) 1786 if (dl->state != DATALINK_CLOSED) 1787 physical_ChangedPid(dl->physical, pid); 1788 write(fds[1], "!", 1); /* done */ 1789 close(fds[1]); 1790 _exit(0); 1791 break; 1792 } 1793 break; 1794 default: 1795 close(fds[0]); 1796 /* Give away all our physical locks (to the intermediate process) */ 1797 for (dl = bundle->links; dl; dl = dl->next) 1798 if (dl->state != DATALINK_CLOSED) 1799 physical_ChangedPid(dl->physical, pid); 1800 write(fds[1], "!", 1); /* done */ 1801 close(fds[1]); 1802 if (holdsession) { 1803 int fd, status; 1804 1805 timer_TermService(); 1806 signal(SIGPIPE, SIG_DFL); 1807 signal(SIGALRM, SIG_DFL); 1808 signal(SIGHUP, SIG_DFL); 1809 signal(SIGTERM, SIG_DFL); 1810 signal(SIGINT, SIG_DFL); 1811 signal(SIGQUIT, SIG_DFL); 1812 for (fd = getdtablesize(); fd >= 0; fd--) 1813 close(fd); 1814 /* 1815 * Reap the intermediate process. As we're not exiting but the 1816 * intermediate is, we don't want it to become defunct. 1817 */ 1818 waitpid(pid, &status, 0); 1819 /* Tweak our process arguments.... */ 1820 ID0setproctitle("session owner"); 1821 setuid(ID0realuid()); 1822 /* 1823 * Hang around for a HUP. This should happen as soon as the 1824 * ppp that we passed our ctty descriptor to closes it. 1825 * NOTE: If this process dies, the passed descriptor becomes 1826 * invalid and will give a select() error by setting one 1827 * of the error fds, aborting the other ppp. We don't 1828 * want that to happen ! 1829 */ 1830 pause(); 1831 } 1832 _exit(0); 1833 break; 1834 } 1835} 1836 1837int 1838bundle_HighestState(struct bundle *bundle) 1839{ 1840 struct datalink *dl; 1841 int result = DATALINK_CLOSED; 1842 1843 for (dl = bundle->links; dl; dl = dl->next) 1844 if (result < dl->state) 1845 result = dl->state; 1846 1847 return result; 1848} 1849 1850int 1851bundle_Exception(struct bundle *bundle, int fd) 1852{ 1853 struct datalink *dl; 1854 1855 for (dl = bundle->links; dl; dl = dl->next) 1856 if (dl->physical->fd == fd) { 1857 datalink_Down(dl, CLOSE_NORMAL); 1858 return 1; 1859 } 1860 1861 return 0; 1862} 1863 1864void 1865bundle_AdjustFilters(struct bundle *bundle, struct in_addr *my_ip, 1866 struct in_addr *peer_ip) 1867{ 1868 filter_AdjustAddr(&bundle->filter.in, my_ip, peer_ip, NULL); 1869 filter_AdjustAddr(&bundle->filter.out, my_ip, peer_ip, NULL); 1870 filter_AdjustAddr(&bundle->filter.dial, my_ip, peer_ip, NULL); 1871 filter_AdjustAddr(&bundle->filter.alive, my_ip, peer_ip, NULL); 1872} 1873 1874void 1875bundle_AdjustDNS(struct bundle *bundle, struct in_addr dns[2]) 1876{ 1877 filter_AdjustAddr(&bundle->filter.in, NULL, NULL, dns); 1878 filter_AdjustAddr(&bundle->filter.out, NULL, NULL, dns); 1879 filter_AdjustAddr(&bundle->filter.dial, NULL, NULL, dns); 1880 filter_AdjustAddr(&bundle->filter.alive, NULL, NULL, dns); 1881} 1882 1883void 1884bundle_CalculateBandwidth(struct bundle *bundle) 1885{ 1886 struct datalink *dl; 1887 int mtu, sp; 1888 1889 bundle->bandwidth = 0; 1890 mtu = 0; 1891 for (dl = bundle->links; dl; dl = dl->next) 1892 if (dl->state == DATALINK_OPEN) { 1893 if ((sp = dl->mp.bandwidth) == 0 && 1894 (sp = physical_GetSpeed(dl->physical)) == 0) 1895 log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n", 1896 dl->name, dl->physical->name.full); 1897 else 1898 bundle->bandwidth += sp; 1899 if (!bundle->ncp.mp.active) { 1900 mtu = dl->physical->link.lcp.his_mru; 1901 break; 1902 } 1903 } 1904 1905 if(bundle->bandwidth == 0) 1906 bundle->bandwidth = 115200; /* Shrug */ 1907 1908 if (bundle->ncp.mp.active) 1909 mtu = bundle->ncp.mp.peer_mrru; 1910 else if (!mtu) 1911 mtu = 1500; 1912 1913#ifndef NORADIUS 1914 if (bundle->radius.valid && bundle->radius.mtu && bundle->radius.mtu < mtu) { 1915 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n", 1916 bundle->radius.mtu); 1917 mtu = bundle->radius.mtu; 1918 } 1919#endif 1920 1921 tun_configure(bundle, mtu); 1922} 1923 1924void 1925bundle_AutoAdjust(struct bundle *bundle, int percent, int what) 1926{ 1927 struct datalink *dl, *choice, *otherlinkup; 1928 1929 choice = otherlinkup = NULL; 1930 for (dl = bundle->links; dl; dl = dl->next) 1931 if (dl->physical->type == PHYS_AUTO) { 1932 if (dl->state == DATALINK_OPEN) { 1933 if (what == AUTO_DOWN) { 1934 if (choice) 1935 otherlinkup = choice; 1936 choice = dl; 1937 } 1938 } else if (dl->state == DATALINK_CLOSED) { 1939 if (what == AUTO_UP) { 1940 choice = dl; 1941 break; 1942 } 1943 } else { 1944 /* An auto link in an intermediate state - forget it for the moment */ 1945 choice = NULL; 1946 break; 1947 } 1948 } else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN) 1949 otherlinkup = dl; 1950 1951 if (choice) { 1952 if (what == AUTO_UP) { 1953 log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n", 1954 percent, choice->name); 1955 datalink_Up(choice, 1, 1); 1956 mp_StopAutoloadTimer(&bundle->ncp.mp); 1957 } else if (otherlinkup) { /* Only bring the second-last link down */ 1958 log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n", 1959 percent, choice->name); 1960 datalink_Close(choice, CLOSE_STAYDOWN); 1961 mp_StopAutoloadTimer(&bundle->ncp.mp); 1962 } 1963 } 1964} 1965 1966int 1967bundle_WantAutoloadTimer(struct bundle *bundle) 1968{ 1969 struct datalink *dl; 1970 int autolink, opened; 1971 1972 if (bundle->phase == PHASE_NETWORK) { 1973 for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next) 1974 if (dl->physical->type == PHYS_AUTO) { 1975 if (++autolink == 2 || (autolink == 1 && opened)) 1976 /* Two auto links or one auto and one open in NETWORK phase */ 1977 return 1; 1978 } else if (dl->state == DATALINK_OPEN) { 1979 opened++; 1980 if (autolink) 1981 /* One auto and one open link in NETWORK phase */ 1982 return 1; 1983 } 1984 } 1985 1986 return 0; 1987} 1988 1989void 1990bundle_ChangedPID(struct bundle *bundle) 1991{ 1992#ifdef TUNSIFPID 1993 ioctl(bundle->dev.fd, TUNSIFPID, 0); 1994#endif 1995} 1996