bundle.c revision 64670
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 64670 2000-08-15 10:25:42Z 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 7 /* version, datalink, name, physical, 99 throughput, 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 163void 164bundle_Notify(struct bundle *bundle, char c) 165{ 166 if (bundle->notify.fd != -1) { 167 int ret; 168 169 ret = write(bundle->notify.fd, &c, 1); 170 if (c != EX_REDIAL && c != EX_RECONNECT) { 171 if (ret == 1) 172 log_Printf(LogCHAT, "Parent notified of %s\n", 173 c == EX_NORMAL ? "success" : "failure"); 174 else 175 log_Printf(LogERROR, "Failed to notify parent of success\n"); 176 close(bundle->notify.fd); 177 bundle->notify.fd = -1; 178 } else if (ret == 1) 179 log_Printf(LogCHAT, "Parent notified of %s\n", ex_desc(c)); 180 else 181 log_Printf(LogERROR, "Failed to notify parent of %s\n", ex_desc(c)); 182 } 183} 184 185static void 186bundle_ClearQueues(void *v) 187{ 188 struct bundle *bundle = (struct bundle *)v; 189 struct datalink *dl; 190 191 log_Printf(LogPHASE, "Clearing choked output queue\n"); 192 timer_Stop(&bundle->choked.timer); 193 194 /* 195 * Emergency time: 196 * 197 * We've had a full queue for PACKET_DEL_SECS seconds without being 198 * able to get rid of any of the packets. We've probably given up 199 * on the redials at this point, and the queued data has almost 200 * definitely been timed out by the layer above. As this is preventing 201 * us from reading the TUN_NAME device (we don't want to buffer stuff 202 * indefinitely), we may as well nuke this data and start with a clean 203 * slate ! 204 * 205 * Unfortunately, this has the side effect of shafting any compression 206 * dictionaries in use (causing the relevant RESET_REQ/RESET_ACK). 207 */ 208 209 ip_DeleteQueue(&bundle->ncp.ipcp); 210 mp_DeleteQueue(&bundle->ncp.mp); 211 for (dl = bundle->links; dl; dl = dl->next) 212 physical_DeleteQueue(dl->physical); 213} 214 215static void 216bundle_LinkAdded(struct bundle *bundle, struct datalink *dl) 217{ 218 bundle->phys_type.all |= dl->physical->type; 219 if (dl->state == DATALINK_OPEN) 220 bundle->phys_type.open |= dl->physical->type; 221 222 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 223 != bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED) 224 /* We may need to start our idle timer */ 225 bundle_StartIdleTimer(bundle, 0); 226} 227 228void 229bundle_LinksRemoved(struct bundle *bundle) 230{ 231 struct datalink *dl; 232 233 bundle->phys_type.all = bundle->phys_type.open = 0; 234 for (dl = bundle->links; dl; dl = dl->next) 235 bundle_LinkAdded(bundle, dl); 236 237 bundle_CalculateBandwidth(bundle); 238 mp_CheckAutoloadTimer(&bundle->ncp.mp); 239 240 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 241 == bundle->phys_type.open) 242 bundle_StopIdleTimer(bundle); 243} 244 245static void 246bundle_LayerUp(void *v, struct fsm *fp) 247{ 248 /* 249 * The given fsm is now up 250 * If it's an LCP, adjust our phys_mode.open value and check the 251 * autoload timer. 252 * If it's the first NCP, calculate our bandwidth 253 * If it's the first NCP, set our ``upat'' time 254 * If it's the first NCP, start the idle timer. 255 * If it's an NCP, tell our -background parent to go away. 256 * If it's the first NCP, start the autoload timer 257 */ 258 struct bundle *bundle = (struct bundle *)v; 259 260 if (fp->proto == PROTO_LCP) { 261 struct physical *p = link2physical(fp->link); 262 263 bundle_LinkAdded(bundle, p->dl); 264 mp_CheckAutoloadTimer(&bundle->ncp.mp); 265 } else if (fp->proto == PROTO_IPCP) { 266 bundle_CalculateBandwidth(fp->bundle); 267 time(&bundle->upat); 268 bundle_StartIdleTimer(bundle, 0); 269 bundle_Notify(bundle, EX_NORMAL); 270 mp_CheckAutoloadTimer(&fp->bundle->ncp.mp); 271 } 272} 273 274static void 275bundle_LayerDown(void *v, struct fsm *fp) 276{ 277 /* 278 * The given FSM has been told to come down. 279 * If it's our last NCP, stop the idle timer. 280 * If it's our last NCP, clear our ``upat'' value. 281 * If it's our last NCP, stop the autoload timer 282 * If it's an LCP, adjust our phys_type.open value and any timers. 283 * If it's an LCP and we're in multilink mode, adjust our tun 284 * If it's the last LCP, down all NCPs 285 * speed and make sure our minimum sequence number is adjusted. 286 */ 287 288 struct bundle *bundle = (struct bundle *)v; 289 290 if (fp->proto == PROTO_IPCP) { 291 bundle_StopIdleTimer(bundle); 292 bundle->upat = 0; 293 mp_StopAutoloadTimer(&bundle->ncp.mp); 294 } else if (fp->proto == PROTO_LCP) { 295 struct datalink *dl; 296 struct datalink *lost; 297 int others_active; 298 299 bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */ 300 301 lost = NULL; 302 others_active = 0; 303 for (dl = bundle->links; dl; dl = dl->next) { 304 if (fp == &dl->physical->link.lcp.fsm) 305 lost = dl; 306 else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 307 others_active++; 308 } 309 310 if (bundle->ncp.mp.active) { 311 bundle_CalculateBandwidth(bundle); 312 313 if (lost) 314 mp_LinkLost(&bundle->ncp.mp, lost); 315 else 316 log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n", 317 fp->link->name); 318 } 319 320 if (!others_active) 321 /* Down the NCPs. We don't expect to get fsm_Close()d ourself ! */ 322 fsm2initial(&bundle->ncp.ipcp.fsm); 323 } 324} 325 326static void 327bundle_LayerFinish(void *v, struct fsm *fp) 328{ 329 /* The given fsm is now down (fp cannot be NULL) 330 * 331 * If it's the last NCP, fsm_Close all LCPs 332 */ 333 334 struct bundle *bundle = (struct bundle *)v; 335 struct datalink *dl; 336 337 if (fp->proto == PROTO_IPCP) { 338 if (bundle_Phase(bundle) != PHASE_DEAD) 339 bundle_NewPhase(bundle, PHASE_TERMINATE); 340 for (dl = bundle->links; dl; dl = dl->next) 341 if (dl->state == DATALINK_OPEN) 342 datalink_Close(dl, CLOSE_STAYDOWN); 343 fsm2initial(fp); 344 } 345} 346 347int 348bundle_LinkIsUp(const struct bundle *bundle) 349{ 350 return bundle->ncp.ipcp.fsm.state == ST_OPENED; 351} 352 353void 354bundle_Close(struct bundle *bundle, const char *name, int how) 355{ 356 /* 357 * Please close the given datalink. 358 * If name == NULL or name is the last datalink, fsm_Close all NCPs 359 * (except our MP) 360 * If it isn't the last datalink, just Close that datalink. 361 */ 362 363 struct datalink *dl, *this_dl; 364 int others_active; 365 366 others_active = 0; 367 this_dl = NULL; 368 369 for (dl = bundle->links; dl; dl = dl->next) { 370 if (name && !strcasecmp(name, dl->name)) 371 this_dl = dl; 372 if (name == NULL || this_dl == dl) { 373 switch (how) { 374 case CLOSE_LCP: 375 datalink_DontHangup(dl); 376 /* fall through */ 377 case CLOSE_STAYDOWN: 378 datalink_StayDown(dl); 379 break; 380 } 381 } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 382 others_active++; 383 } 384 385 if (name && this_dl == NULL) { 386 log_Printf(LogWARN, "%s: Invalid datalink name\n", name); 387 return; 388 } 389 390 if (!others_active) { 391 bundle_StopIdleTimer(bundle); 392 if (bundle->ncp.ipcp.fsm.state > ST_CLOSED || 393 bundle->ncp.ipcp.fsm.state == ST_STARTING) 394 fsm_Close(&bundle->ncp.ipcp.fsm); 395 else { 396 fsm2initial(&bundle->ncp.ipcp.fsm); 397 for (dl = bundle->links; dl; dl = dl->next) 398 datalink_Close(dl, how); 399 } 400 } else if (this_dl && this_dl->state != DATALINK_CLOSED && 401 this_dl->state != DATALINK_HANGUP) 402 datalink_Close(this_dl, how); 403} 404 405void 406bundle_Down(struct bundle *bundle, int how) 407{ 408 struct datalink *dl; 409 410 for (dl = bundle->links; dl; dl = dl->next) 411 datalink_Down(dl, how); 412} 413 414static size_t 415bundle_FillQueues(struct bundle *bundle) 416{ 417 size_t total; 418 419 if (bundle->ncp.mp.active) 420 total = mp_FillQueues(bundle); 421 else { 422 struct datalink *dl; 423 size_t add; 424 425 for (total = 0, dl = bundle->links; dl; dl = dl->next) 426 if (dl->state == DATALINK_OPEN) { 427 add = link_QueueLen(&dl->physical->link); 428 if (add == 0 && dl->physical->out == NULL) 429 add = ip_PushPacket(&dl->physical->link, bundle); 430 total += add; 431 } 432 } 433 434 return total + ip_QueueLen(&bundle->ncp.ipcp); 435} 436 437static int 438bundle_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 439{ 440 struct bundle *bundle = descriptor2bundle(d); 441 struct datalink *dl; 442 int result, nlinks; 443 u_short ifqueue; 444 size_t queued; 445 446 result = 0; 447 448 /* If there are aren't many packets queued, look for some more. */ 449 for (nlinks = 0, dl = bundle->links; dl; dl = dl->next) 450 nlinks++; 451 452 if (nlinks) { 453 queued = r ? bundle_FillQueues(bundle) : ip_QueueLen(&bundle->ncp.ipcp); 454 455 if (r && (bundle->phase == PHASE_NETWORK || 456 bundle->phys_type.all & PHYS_AUTO)) { 457 /* enough surplus so that we can tell if we're getting swamped */ 458 ifqueue = nlinks > bundle->cfg.ifqueue ? nlinks : bundle->cfg.ifqueue; 459 if (queued < ifqueue) { 460 /* Not enough - select() for more */ 461 if (bundle->choked.timer.state == TIMER_RUNNING) 462 timer_Stop(&bundle->choked.timer); /* Not needed any more */ 463 FD_SET(bundle->dev.fd, r); 464 if (*n < bundle->dev.fd + 1) 465 *n = bundle->dev.fd + 1; 466 log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd); 467 result++; 468 } else if (bundle->choked.timer.state == TIMER_STOPPED) { 469 bundle->choked.timer.func = bundle_ClearQueues; 470 bundle->choked.timer.name = "output choke"; 471 bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS; 472 bundle->choked.timer.arg = bundle; 473 timer_Start(&bundle->choked.timer); 474 } 475 } 476 } 477 478#ifndef NORADIUS 479 result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n); 480#endif 481 482 /* Which links need a select() ? */ 483 for (dl = bundle->links; dl; dl = dl->next) 484 result += descriptor_UpdateSet(&dl->desc, r, w, e, n); 485 486 /* 487 * This *MUST* be called after the datalink UpdateSet()s as it 488 * might be ``holding'' one of the datalinks (death-row) and 489 * wants to be able to de-select() it from the descriptor set. 490 */ 491 result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n); 492 493 return result; 494} 495 496static int 497bundle_IsSet(struct fdescriptor *d, const fd_set *fdset) 498{ 499 struct bundle *bundle = descriptor2bundle(d); 500 struct datalink *dl; 501 502 for (dl = bundle->links; dl; dl = dl->next) 503 if (descriptor_IsSet(&dl->desc, fdset)) 504 return 1; 505 506#ifndef NORADIUS 507 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 508 return 1; 509#endif 510 511 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 512 return 1; 513 514 return FD_ISSET(bundle->dev.fd, fdset); 515} 516 517static void 518bundle_DescriptorRead(struct fdescriptor *d, struct bundle *bundle, 519 const fd_set *fdset) 520{ 521 struct datalink *dl; 522 unsigned secs; 523 524 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 525 descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset); 526 527 for (dl = bundle->links; dl; dl = dl->next) 528 if (descriptor_IsSet(&dl->desc, fdset)) 529 descriptor_Read(&dl->desc, bundle, fdset); 530 531#ifndef NORADIUS 532 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 533 descriptor_Read(&bundle->radius.desc, bundle, fdset); 534#endif 535 536 if (FD_ISSET(bundle->dev.fd, fdset)) { 537 struct tun_data tun; 538 int n, pri; 539 char *data; 540 size_t sz; 541 542 if (bundle->dev.header) { 543 data = (char *)&tun; 544 sz = sizeof tun; 545 } else { 546 data = tun.data; 547 sz = sizeof tun.data; 548 } 549 550 /* something to read from tun */ 551 552 n = read(bundle->dev.fd, data, sz); 553 if (n < 0) { 554 log_Printf(LogWARN, "%s: read: %s\n", bundle->dev.Name, strerror(errno)); 555 return; 556 } 557 558 if (bundle->dev.header) { 559 n -= sz - sizeof tun.data; 560 if (n <= 0) { 561 log_Printf(LogERROR, "%s: read: Got only %d bytes of data !\n", 562 bundle->dev.Name, n); 563 return; 564 } 565 if (ntohl(tun.header.family) != AF_INET) 566 /* XXX: Should be maintaining drop/family counts ! */ 567 return; 568 } 569 570 if (((struct ip *)tun.data)->ip_dst.s_addr == 571 bundle->ncp.ipcp.my_ip.s_addr) { 572 /* we've been asked to send something addressed *to* us :( */ 573 if (Enabled(bundle, OPT_LOOPBACK)) { 574 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.in, NULL, NULL); 575 if (pri >= 0) { 576 n += sz - sizeof tun.data; 577 write(bundle->dev.fd, data, n); 578 log_Printf(LogDEBUG, "Looped back packet addressed to myself\n"); 579 } 580 return; 581 } else 582 log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n"); 583 } 584 585 /* 586 * Process on-demand dialup. Output packets are queued within tunnel 587 * device until IPCP is opened. 588 */ 589 590 if (bundle_Phase(bundle) == PHASE_DEAD) { 591 /* 592 * Note, we must be in AUTO mode :-/ otherwise our interface should 593 * *not* be UP and we can't receive data 594 */ 595 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.dial, NULL, NULL); 596 if (pri >= 0) 597 bundle_Open(bundle, NULL, PHYS_AUTO, 0); 598 else 599 /* 600 * Drop the packet. If we were to queue it, we'd just end up with 601 * a pile of timed-out data in our output queue by the time we get 602 * around to actually dialing. We'd also prematurely reach the 603 * threshold at which we stop select()ing to read() the tun 604 * device - breaking auto-dial. 605 */ 606 return; 607 } 608 609 secs = 0; 610 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.out, NULL, &secs); 611 if (pri >= 0) { 612 /* Prepend the number of seconds timeout given in the filter */ 613 tun.header.timeout = secs; 614 ip_Enqueue(&bundle->ncp.ipcp, pri, (char *)&tun, n + sizeof tun.header); 615 } 616 } 617} 618 619static int 620bundle_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle, 621 const fd_set *fdset) 622{ 623 struct datalink *dl; 624 int result = 0; 625 626 /* This is not actually necessary as struct mpserver doesn't Write() */ 627 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 628 descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset); 629 630 for (dl = bundle->links; dl; dl = dl->next) 631 if (descriptor_IsSet(&dl->desc, fdset)) 632 result += descriptor_Write(&dl->desc, bundle, fdset); 633 634 return result; 635} 636 637void 638bundle_LockTun(struct bundle *bundle) 639{ 640 FILE *lockfile; 641 char pidfile[MAXPATHLEN]; 642 643 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 644 lockfile = ID0fopen(pidfile, "w"); 645 if (lockfile != NULL) { 646 fprintf(lockfile, "%d\n", (int)getpid()); 647 fclose(lockfile); 648 } 649#ifndef RELEASE_CRUNCH 650 else 651 log_Printf(LogERROR, "Warning: Can't create %s: %s\n", 652 pidfile, strerror(errno)); 653#endif 654} 655 656static void 657bundle_UnlockTun(struct bundle *bundle) 658{ 659 char pidfile[MAXPATHLEN]; 660 661 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 662 ID0unlink(pidfile); 663} 664 665struct bundle * 666bundle_Create(const char *prefix, int type, int unit) 667{ 668 static struct bundle bundle; /* there can be only one */ 669 int enoentcount, err, minunit, maxunit; 670 const char *ifname; 671#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 672 int kldtried; 673#endif 674#if defined(TUNSIFMODE) || defined(TUNSLMODE) || defined(TUNSIFHEAD) 675 int iff; 676#endif 677 678 if (bundle.iface != NULL) { /* Already allocated ! */ 679 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n"); 680 return NULL; 681 } 682 683 if (unit == -1) { 684 minunit = 0; 685 maxunit = -1; 686 } else { 687 minunit = unit; 688 maxunit = unit + 1; 689 } 690 err = ENOENT; 691 enoentcount = 0; 692#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 693 kldtried = 0; 694#endif 695 for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) { 696 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d", 697 prefix, bundle.unit); 698 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR); 699 if (bundle.dev.fd >= 0) 700 break; 701 else if (errno == ENXIO) { 702#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 703 if (bundle.unit == minunit && !kldtried++) { 704 /* 705 * Attempt to load the tunnel interface KLD if it isn't loaded 706 * already. 707 */ 708 if (modfind("if_tun") == -1) { 709 if (ID0kldload("if_tun") != -1) { 710 bundle.unit--; 711 continue; 712 } 713 log_Printf(LogWARN, "kldload: if_tun: %s\n", strerror(errno)); 714 } 715 } 716#endif 717 err = errno; 718 break; 719 } else if (errno == ENOENT) { 720 if (++enoentcount > 2) 721 break; 722 } else 723 err = errno; 724 } 725 726 if (bundle.dev.fd < 0) { 727 if (unit == -1) 728 log_Printf(LogWARN, "No available tunnel devices found (%s)\n", 729 strerror(err)); 730 else 731 log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err)); 732 return NULL; 733 } 734 735 log_SetTun(bundle.unit); 736 737 ifname = strrchr(bundle.dev.Name, '/'); 738 if (ifname == NULL) 739 ifname = bundle.dev.Name; 740 else 741 ifname++; 742 743 bundle.iface = iface_Create(ifname); 744 if (bundle.iface == NULL) { 745 close(bundle.dev.fd); 746 return NULL; 747 } 748 749#ifdef TUNSIFMODE 750 /* Make sure we're POINTOPOINT */ 751 iff = IFF_POINTOPOINT; 752 if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0) 753 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n", 754 strerror(errno)); 755#endif 756 757#ifdef TUNSLMODE 758 /* Make sure we're not prepending sockaddrs */ 759 iff = 0; 760 if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0) 761 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n", 762 strerror(errno)); 763#endif 764 765#ifdef TUNSIFHEAD 766 /* We want the address family please ! */ 767 iff = 1; 768 if (ID0ioctl(bundle.dev.fd, TUNSIFHEAD, &iff) < 0) { 769 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFHEAD): %s\n", 770 strerror(errno)); 771 bundle.dev.header = 0; 772 } else 773 bundle.dev.header = 1; 774#else 775#ifdef __OpenBSD__ 776 /* Always present for OpenBSD */ 777 bundle.dev.header = 1; 778#else 779 /* 780 * If TUNSIFHEAD isn't available and we're not OpenBSD, assume 781 * everything's AF_INET (hopefully the tun device won't pass us 782 * anything else !). 783 */ 784 bundle.dev.header = 0; 785#endif 786#endif 787 788 if (!iface_SetFlags(bundle.iface, IFF_UP)) { 789 iface_Destroy(bundle.iface); 790 bundle.iface = NULL; 791 close(bundle.dev.fd); 792 return NULL; 793 } 794 795 log_Printf(LogPHASE, "Using interface: %s\n", ifname); 796 797 bundle.bandwidth = 0; 798 bundle.routing_seq = 0; 799 bundle.phase = PHASE_DEAD; 800 bundle.CleaningUp = 0; 801 bundle.NatEnabled = 0; 802 803 bundle.fsm.LayerStart = bundle_LayerStart; 804 bundle.fsm.LayerUp = bundle_LayerUp; 805 bundle.fsm.LayerDown = bundle_LayerDown; 806 bundle.fsm.LayerFinish = bundle_LayerFinish; 807 bundle.fsm.object = &bundle; 808 809 bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT; 810 bundle.cfg.idle.min_timeout = 0; 811 *bundle.cfg.auth.name = '\0'; 812 *bundle.cfg.auth.key = '\0'; 813 bundle.cfg.opt = OPT_SROUTES | OPT_IDCHECK | OPT_LOOPBACK | 814 OPT_THROUGHPUT | OPT_UTMP; 815 *bundle.cfg.label = '\0'; 816 bundle.cfg.mtu = DEF_MTU; 817 bundle.cfg.ifqueue = DEF_IFQUEUE; 818 bundle.cfg.choked.timeout = CHOKED_TIMEOUT; 819 bundle.phys_type.all = type; 820 bundle.phys_type.open = 0; 821 bundle.upat = 0; 822 823 bundle.links = datalink_Create("deflink", &bundle, type); 824 if (bundle.links == NULL) { 825 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno)); 826 iface_Destroy(bundle.iface); 827 bundle.iface = NULL; 828 close(bundle.dev.fd); 829 return NULL; 830 } 831 832 bundle.desc.type = BUNDLE_DESCRIPTOR; 833 bundle.desc.UpdateSet = bundle_UpdateSet; 834 bundle.desc.IsSet = bundle_IsSet; 835 bundle.desc.Read = bundle_DescriptorRead; 836 bundle.desc.Write = bundle_DescriptorWrite; 837 838 mp_Init(&bundle.ncp.mp, &bundle); 839 840 /* Send over the first physical link by default */ 841 ipcp_Init(&bundle.ncp.ipcp, &bundle, &bundle.links->physical->link, 842 &bundle.fsm); 843 844 memset(&bundle.filter, '\0', sizeof bundle.filter); 845 bundle.filter.in.fragok = bundle.filter.in.logok = 1; 846 bundle.filter.in.name = "IN"; 847 bundle.filter.out.fragok = bundle.filter.out.logok = 1; 848 bundle.filter.out.name = "OUT"; 849 bundle.filter.dial.name = "DIAL"; 850 bundle.filter.dial.logok = 1; 851 bundle.filter.alive.name = "ALIVE"; 852 bundle.filter.alive.logok = 1; 853 { 854 int i; 855 for (i = 0; i < MAXFILTERS; i++) { 856 bundle.filter.in.rule[i].f_action = A_NONE; 857 bundle.filter.out.rule[i].f_action = A_NONE; 858 bundle.filter.dial.rule[i].f_action = A_NONE; 859 bundle.filter.alive.rule[i].f_action = A_NONE; 860 } 861 } 862 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer); 863 bundle.idle.done = 0; 864 bundle.notify.fd = -1; 865 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer); 866#ifndef NORADIUS 867 radius_Init(&bundle.radius); 868#endif 869 870 /* Clean out any leftover crud */ 871 iface_Clear(bundle.iface, IFACE_CLEAR_ALL); 872 873 bundle_LockTun(&bundle); 874 875 return &bundle; 876} 877 878static void 879bundle_DownInterface(struct bundle *bundle) 880{ 881 route_IfDelete(bundle, 1); 882 iface_ClearFlags(bundle->iface, IFF_UP); 883} 884 885void 886bundle_Destroy(struct bundle *bundle) 887{ 888 struct datalink *dl; 889 890 /* 891 * Clean up the interface. We don't need to timer_Stop()s, mp_Down(), 892 * ipcp_CleanInterface() and bundle_DownInterface() unless we're getting 893 * out under exceptional conditions such as a descriptor exception. 894 */ 895 timer_Stop(&bundle->idle.timer); 896 timer_Stop(&bundle->choked.timer); 897 mp_Down(&bundle->ncp.mp); 898 ipcp_CleanInterface(&bundle->ncp.ipcp); 899 bundle_DownInterface(bundle); 900 901#ifndef NORADIUS 902 /* Tell the radius server the bad news */ 903 radius_Destroy(&bundle->radius); 904#endif 905 906 /* Again, these are all DATALINK_CLOSED unless we're abending */ 907 dl = bundle->links; 908 while (dl) 909 dl = datalink_Destroy(dl); 910 911 ipcp_Destroy(&bundle->ncp.ipcp); 912 913 close(bundle->dev.fd); 914 bundle_UnlockTun(bundle); 915 916 /* In case we never made PHASE_NETWORK */ 917 bundle_Notify(bundle, EX_ERRDEAD); 918 919 iface_Destroy(bundle->iface); 920 bundle->iface = NULL; 921} 922 923struct rtmsg { 924 struct rt_msghdr m_rtm; 925 char m_space[64]; 926}; 927 928int 929bundle_SetRoute(struct bundle *bundle, int cmd, struct in_addr dst, 930 struct in_addr gateway, struct in_addr mask, int bang, int ssh) 931{ 932 struct rtmsg rtmes; 933 int s, nb, wb; 934 char *cp; 935 const char *cmdstr; 936 struct sockaddr_in rtdata; 937 int result = 1; 938 939 if (bang) 940 cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!"); 941 else 942 cmdstr = (cmd == RTM_ADD ? "Add" : "Delete"); 943 s = ID0socket(PF_ROUTE, SOCK_RAW, 0); 944 if (s < 0) { 945 log_Printf(LogERROR, "bundle_SetRoute: socket(): %s\n", strerror(errno)); 946 return result; 947 } 948 memset(&rtmes, '\0', sizeof rtmes); 949 rtmes.m_rtm.rtm_version = RTM_VERSION; 950 rtmes.m_rtm.rtm_type = cmd; 951 rtmes.m_rtm.rtm_addrs = RTA_DST; 952 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; 953 rtmes.m_rtm.rtm_pid = getpid(); 954 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 955 956 if (cmd == RTM_ADD || cmd == RTM_CHANGE) { 957 if (bundle->ncp.ipcp.cfg.sendpipe > 0) { 958 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.ipcp.cfg.sendpipe; 959 rtmes.m_rtm.rtm_inits |= RTV_SPIPE; 960 } 961 if (bundle->ncp.ipcp.cfg.recvpipe > 0) { 962 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.ipcp.cfg.recvpipe; 963 rtmes.m_rtm.rtm_inits |= RTV_RPIPE; 964 } 965 } 966 967 memset(&rtdata, '\0', sizeof rtdata); 968 rtdata.sin_len = sizeof rtdata; 969 rtdata.sin_family = AF_INET; 970 rtdata.sin_port = 0; 971 rtdata.sin_addr = dst; 972 973 cp = rtmes.m_space; 974 memcpy(cp, &rtdata, rtdata.sin_len); 975 cp += rtdata.sin_len; 976 if (cmd == RTM_ADD) { 977 if (gateway.s_addr == INADDR_ANY) { 978 if (!ssh) 979 log_Printf(LogERROR, "bundle_SetRoute: Cannot add a route with" 980 " destination 0.0.0.0\n"); 981 close(s); 982 return result; 983 } else { 984 rtdata.sin_addr = gateway; 985 memcpy(cp, &rtdata, rtdata.sin_len); 986 cp += rtdata.sin_len; 987 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; 988 } 989 } 990 991 if (dst.s_addr == INADDR_ANY) 992 mask.s_addr = INADDR_ANY; 993 994 if (cmd == RTM_ADD || dst.s_addr == INADDR_ANY) { 995 rtdata.sin_addr = mask; 996 memcpy(cp, &rtdata, rtdata.sin_len); 997 cp += rtdata.sin_len; 998 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; 999 } 1000 1001 nb = cp - (char *) &rtmes; 1002 rtmes.m_rtm.rtm_msglen = nb; 1003 wb = ID0write(s, &rtmes, nb); 1004 if (wb < 0) { 1005 log_Printf(LogTCPIP, "bundle_SetRoute failure:\n"); 1006 log_Printf(LogTCPIP, "bundle_SetRoute: Cmd = %s\n", cmdstr); 1007 log_Printf(LogTCPIP, "bundle_SetRoute: Dst = %s\n", inet_ntoa(dst)); 1008 log_Printf(LogTCPIP, "bundle_SetRoute: Gateway = %s\n", 1009 inet_ntoa(gateway)); 1010 log_Printf(LogTCPIP, "bundle_SetRoute: Mask = %s\n", inet_ntoa(mask)); 1011failed: 1012 if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST || 1013 (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) { 1014 if (!bang) { 1015 log_Printf(LogWARN, "Add route failed: %s already exists\n", 1016 dst.s_addr == 0 ? "default" : inet_ntoa(dst)); 1017 result = 0; /* Don't add to our dynamic list */ 1018 } else { 1019 rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE; 1020 if ((wb = ID0write(s, &rtmes, nb)) < 0) 1021 goto failed; 1022 } 1023 } else if (cmd == RTM_DELETE && 1024 (rtmes.m_rtm.rtm_errno == ESRCH || 1025 (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) { 1026 if (!bang) 1027 log_Printf(LogWARN, "Del route failed: %s: Non-existent\n", 1028 inet_ntoa(dst)); 1029 } else if (rtmes.m_rtm.rtm_errno == 0) { 1030 if (!ssh || errno != ENETUNREACH) 1031 log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr, 1032 inet_ntoa(dst), strerror(errno)); 1033 } else 1034 log_Printf(LogWARN, "%s route failed: %s: %s\n", 1035 cmdstr, inet_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno)); 1036 } 1037 log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %x, gateway = %x\n", 1038 wb, cmdstr, (unsigned)dst.s_addr, (unsigned)gateway.s_addr); 1039 close(s); 1040 1041 return result; 1042} 1043 1044void 1045bundle_LinkClosed(struct bundle *bundle, struct datalink *dl) 1046{ 1047 /* 1048 * Our datalink has closed. 1049 * CleanDatalinks() (called from DoLoop()) will remove closed 1050 * BACKGROUND, FOREGROUND and DIRECT links. 1051 * If it's the last data link, enter phase DEAD. 1052 * 1053 * NOTE: dl may not be in our list (bundle_SendDatalink()) ! 1054 */ 1055 1056 struct datalink *odl; 1057 int other_links; 1058 1059 log_SetTtyCommandMode(dl); 1060 1061 other_links = 0; 1062 for (odl = bundle->links; odl; odl = odl->next) 1063 if (odl != dl && odl->state != DATALINK_CLOSED) 1064 other_links++; 1065 1066 if (!other_links) { 1067 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */ 1068 bundle_DownInterface(bundle); 1069 fsm2initial(&bundle->ncp.ipcp.fsm); 1070 bundle_NewPhase(bundle, PHASE_DEAD); 1071 bundle_StopIdleTimer(bundle); 1072 } 1073} 1074 1075void 1076bundle_Open(struct bundle *bundle, const char *name, int mask, int force) 1077{ 1078 /* 1079 * Please open the given datalink, or all if name == NULL 1080 */ 1081 struct datalink *dl; 1082 1083 for (dl = bundle->links; dl; dl = dl->next) 1084 if (name == NULL || !strcasecmp(dl->name, name)) { 1085 if ((mask & dl->physical->type) && 1086 (dl->state == DATALINK_CLOSED || 1087 (force && dl->state == DATALINK_OPENING && 1088 dl->dial.timer.state == TIMER_RUNNING) || 1089 dl->state == DATALINK_READY)) { 1090 timer_Stop(&dl->dial.timer); /* We're finished with this */ 1091 datalink_Up(dl, 1, 1); 1092 if (mask & PHYS_AUTO) 1093 break; /* Only one AUTO link at a time */ 1094 } 1095 if (name != NULL) 1096 break; 1097 } 1098} 1099 1100struct datalink * 1101bundle2datalink(struct bundle *bundle, const char *name) 1102{ 1103 struct datalink *dl; 1104 1105 if (name != NULL) { 1106 for (dl = bundle->links; dl; dl = dl->next) 1107 if (!strcasecmp(dl->name, name)) 1108 return dl; 1109 } else if (bundle->links && !bundle->links->next) 1110 return bundle->links; 1111 1112 return NULL; 1113} 1114 1115int 1116bundle_ShowLinks(struct cmdargs const *arg) 1117{ 1118 struct datalink *dl; 1119 struct pppThroughput *t; 1120 unsigned long long octets; 1121 int secs; 1122 1123 for (dl = arg->bundle->links; dl; dl = dl->next) { 1124 octets = MAX(dl->physical->link.stats.total.in.OctetsPerSecond, 1125 dl->physical->link.stats.total.out.OctetsPerSecond); 1126 1127 prompt_Printf(arg->prompt, "Name: %s [%s, %s]", 1128 dl->name, mode2Nam(dl->physical->type), datalink_State(dl)); 1129 if (dl->physical->link.stats.total.rolling && dl->state == DATALINK_OPEN) 1130 prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)", 1131 dl->mp.bandwidth ? dl->mp.bandwidth : 1132 physical_GetSpeed(dl->physical), 1133 octets * 8, octets); 1134 prompt_Printf(arg->prompt, "\n"); 1135 } 1136 1137 t = &arg->bundle->ncp.mp.link.stats.total; 1138 octets = MAX(t->in.OctetsPerSecond, t->out.OctetsPerSecond); 1139 secs = t->downtime ? 0 : throughput_uptime(t); 1140 if (secs > t->SamplePeriod) 1141 secs = t->SamplePeriod; 1142 if (secs) 1143 prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)" 1144 " over the last %d secs\n", octets * 8, octets, secs); 1145 1146 return 0; 1147} 1148 1149static const char * 1150optval(struct bundle *bundle, int bit) 1151{ 1152 return (bundle->cfg.opt & bit) ? "enabled" : "disabled"; 1153} 1154 1155int 1156bundle_ShowStatus(struct cmdargs const *arg) 1157{ 1158 int remaining; 1159 1160 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle)); 1161 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name); 1162 prompt_Printf(arg->prompt, " Interface: %s @ %lubps", 1163 arg->bundle->iface->name, arg->bundle->bandwidth); 1164 1165 if (arg->bundle->upat) { 1166 int secs = time(NULL) - arg->bundle->upat; 1167 1168 prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600, 1169 (secs / 60) % 60, secs % 60); 1170 } 1171 prompt_Printf(arg->prompt, "\n Queued: %lu of %u\n", 1172 (unsigned long)ip_QueueLen(&arg->bundle->ncp.ipcp), 1173 arg->bundle->cfg.ifqueue); 1174 1175 prompt_Printf(arg->prompt, "\nDefaults:\n"); 1176 prompt_Printf(arg->prompt, " Label: %s\n", arg->bundle->cfg.label); 1177 prompt_Printf(arg->prompt, " Auth name: %s\n", 1178 arg->bundle->cfg.auth.name); 1179 1180 prompt_Printf(arg->prompt, " Choked Timer: %ds\n", 1181 arg->bundle->cfg.choked.timeout); 1182 1183#ifndef NORADIUS 1184 radius_Show(&arg->bundle->radius, arg->prompt); 1185#endif 1186 1187 prompt_Printf(arg->prompt, " Idle Timer: "); 1188 if (arg->bundle->cfg.idle.timeout) { 1189 prompt_Printf(arg->prompt, "%ds", arg->bundle->cfg.idle.timeout); 1190 if (arg->bundle->cfg.idle.min_timeout) 1191 prompt_Printf(arg->prompt, ", min %ds", 1192 arg->bundle->cfg.idle.min_timeout); 1193 remaining = bundle_RemainingIdleTime(arg->bundle); 1194 if (remaining != -1) 1195 prompt_Printf(arg->prompt, " (%ds remaining)", remaining); 1196 prompt_Printf(arg->prompt, "\n"); 1197 } else 1198 prompt_Printf(arg->prompt, "disabled\n"); 1199 prompt_Printf(arg->prompt, " MTU: "); 1200 if (arg->bundle->cfg.mtu) 1201 prompt_Printf(arg->prompt, "%d\n", arg->bundle->cfg.mtu); 1202 else 1203 prompt_Printf(arg->prompt, "unspecified\n"); 1204 1205 prompt_Printf(arg->prompt, " sendpipe: "); 1206 if (arg->bundle->ncp.ipcp.cfg.sendpipe > 0) 1207 prompt_Printf(arg->prompt, "%-20ld", arg->bundle->ncp.ipcp.cfg.sendpipe); 1208 else 1209 prompt_Printf(arg->prompt, "unspecified "); 1210 prompt_Printf(arg->prompt, " recvpipe: "); 1211 if (arg->bundle->ncp.ipcp.cfg.recvpipe > 0) 1212 prompt_Printf(arg->prompt, "%ld\n", arg->bundle->ncp.ipcp.cfg.recvpipe); 1213 else 1214 prompt_Printf(arg->prompt, "unspecified\n"); 1215 1216 prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s", 1217 optval(arg->bundle, OPT_SROUTES)); 1218 prompt_Printf(arg->prompt, " Filter Decap: %s\n", 1219 optval(arg->bundle, OPT_FILTERDECAP)); 1220 prompt_Printf(arg->prompt, " ID check: %-20.20s", 1221 optval(arg->bundle, OPT_IDCHECK)); 1222 prompt_Printf(arg->prompt, " Keep-Session: %s\n", 1223 optval(arg->bundle, OPT_KEEPSESSION)); 1224 prompt_Printf(arg->prompt, " Loopback: %-20.20s", 1225 optval(arg->bundle, OPT_LOOPBACK)); 1226 prompt_Printf(arg->prompt, " PasswdAuth: %s\n", 1227 optval(arg->bundle, OPT_PASSWDAUTH)); 1228 prompt_Printf(arg->prompt, " Proxy: %-20.20s", 1229 optval(arg->bundle, OPT_PROXY)); 1230 prompt_Printf(arg->prompt, " Proxyall: %s\n", 1231 optval(arg->bundle, OPT_PROXYALL)); 1232 prompt_Printf(arg->prompt, " Throughput: %-20.20s", 1233 optval(arg->bundle, OPT_THROUGHPUT)); 1234 prompt_Printf(arg->prompt, " Utmp Logging: %s\n", 1235 optval(arg->bundle, OPT_UTMP)); 1236 prompt_Printf(arg->prompt, " Iface-Alias: %s\n", 1237 optval(arg->bundle, OPT_IFACEALIAS)); 1238 1239 return 0; 1240} 1241 1242static void 1243bundle_IdleTimeout(void *v) 1244{ 1245 struct bundle *bundle = (struct bundle *)v; 1246 1247 log_Printf(LogPHASE, "Idle timer expired\n"); 1248 bundle_StopIdleTimer(bundle); 1249 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1250} 1251 1252/* 1253 * Start Idle timer. If timeout is reached, we call bundle_Close() to 1254 * close LCP and link. 1255 */ 1256void 1257bundle_StartIdleTimer(struct bundle *bundle, unsigned secs) 1258{ 1259 timer_Stop(&bundle->idle.timer); 1260 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1261 bundle->phys_type.open && bundle->cfg.idle.timeout) { 1262 time_t now = time(NULL); 1263 1264 if (secs == 0) 1265 secs = bundle->cfg.idle.timeout; 1266 1267 /* We want at least `secs' */ 1268 if (bundle->cfg.idle.min_timeout > secs && bundle->upat) { 1269 int up = now - bundle->upat; 1270 1271 if ((long long)bundle->cfg.idle.min_timeout - up > (long long)secs) 1272 /* Only increase from the current `remaining' value */ 1273 secs = bundle->cfg.idle.min_timeout - up; 1274 } 1275 bundle->idle.timer.func = bundle_IdleTimeout; 1276 bundle->idle.timer.name = "idle"; 1277 bundle->idle.timer.load = secs * SECTICKS; 1278 bundle->idle.timer.arg = bundle; 1279 timer_Start(&bundle->idle.timer); 1280 bundle->idle.done = now + secs; 1281 } 1282} 1283 1284void 1285bundle_SetIdleTimer(struct bundle *bundle, int timeout, int min_timeout) 1286{ 1287 bundle->cfg.idle.timeout = timeout; 1288 if (min_timeout >= 0) 1289 bundle->cfg.idle.min_timeout = min_timeout; 1290 if (bundle_LinkIsUp(bundle)) 1291 bundle_StartIdleTimer(bundle, 0); 1292} 1293 1294void 1295bundle_StopIdleTimer(struct bundle *bundle) 1296{ 1297 timer_Stop(&bundle->idle.timer); 1298 bundle->idle.done = 0; 1299} 1300 1301static int 1302bundle_RemainingIdleTime(struct bundle *bundle) 1303{ 1304 if (bundle->idle.done) 1305 return bundle->idle.done - time(NULL); 1306 return -1; 1307} 1308 1309int 1310bundle_IsDead(struct bundle *bundle) 1311{ 1312 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp); 1313} 1314 1315static struct datalink * 1316bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl) 1317{ 1318 struct datalink **dlp; 1319 1320 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next) 1321 if (*dlp == dl) { 1322 *dlp = dl->next; 1323 dl->next = NULL; 1324 bundle_LinksRemoved(bundle); 1325 return dl; 1326 } 1327 1328 return NULL; 1329} 1330 1331static void 1332bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl) 1333{ 1334 struct datalink **dlp = &bundle->links; 1335 1336 while (*dlp) 1337 dlp = &(*dlp)->next; 1338 1339 *dlp = dl; 1340 dl->next = NULL; 1341 1342 bundle_LinkAdded(bundle, dl); 1343 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1344} 1345 1346void 1347bundle_CleanDatalinks(struct bundle *bundle) 1348{ 1349 struct datalink **dlp = &bundle->links; 1350 int found = 0; 1351 1352 while (*dlp) 1353 if ((*dlp)->state == DATALINK_CLOSED && 1354 (*dlp)->physical->type & 1355 (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) { 1356 *dlp = datalink_Destroy(*dlp); 1357 found++; 1358 } else 1359 dlp = &(*dlp)->next; 1360 1361 if (found) 1362 bundle_LinksRemoved(bundle); 1363} 1364 1365int 1366bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl, 1367 const char *name) 1368{ 1369 if (bundle2datalink(bundle, name)) { 1370 log_Printf(LogWARN, "Clone: %s: name already exists\n", name); 1371 return 0; 1372 } 1373 1374 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name)); 1375 return 1; 1376} 1377 1378void 1379bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl) 1380{ 1381 dl = bundle_DatalinkLinkout(bundle, dl); 1382 if (dl) 1383 datalink_Destroy(dl); 1384} 1385 1386void 1387bundle_SetLabel(struct bundle *bundle, const char *label) 1388{ 1389 if (label) 1390 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1); 1391 else 1392 *bundle->cfg.label = '\0'; 1393} 1394 1395const char * 1396bundle_GetLabel(struct bundle *bundle) 1397{ 1398 return *bundle->cfg.label ? bundle->cfg.label : NULL; 1399} 1400 1401int 1402bundle_LinkSize() 1403{ 1404 struct iovec iov[SCATTER_SEGMENTS]; 1405 int niov, expect, f; 1406 1407 iov[0].iov_len = strlen(Version) + 1; 1408 iov[0].iov_base = NULL; 1409 niov = 1; 1410 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1411 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1412 return 0; 1413 } 1414 1415 for (f = expect = 0; f < niov; f++) 1416 expect += iov[f].iov_len; 1417 1418 return expect; 1419} 1420 1421void 1422bundle_ReceiveDatalink(struct bundle *bundle, int s) 1423{ 1424 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1425 int niov, expect, f, *fd, nfd, onfd, got; 1426 struct iovec iov[SCATTER_SEGMENTS]; 1427 struct cmsghdr *cmsg; 1428 struct msghdr msg; 1429 struct datalink *dl; 1430 pid_t pid; 1431 1432 log_Printf(LogPHASE, "Receiving datalink\n"); 1433 1434 /* 1435 * Create our scatter/gather array - passing NULL gets the space 1436 * allocation requirement rather than actually flattening the 1437 * structures. 1438 */ 1439 iov[0].iov_len = strlen(Version) + 1; 1440 iov[0].iov_base = NULL; 1441 niov = 1; 1442 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1443 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1444 return; 1445 } 1446 1447 /* Allocate the scatter/gather array for recvmsg() */ 1448 for (f = expect = 0; f < niov; f++) { 1449 if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) { 1450 log_Printf(LogERROR, "Cannot allocate space to receive link\n"); 1451 return; 1452 } 1453 if (f) 1454 expect += iov[f].iov_len; 1455 } 1456 1457 /* Set up our message */ 1458 cmsg = (struct cmsghdr *)cmsgbuf; 1459 cmsg->cmsg_len = sizeof cmsgbuf; 1460 cmsg->cmsg_level = SOL_SOCKET; 1461 cmsg->cmsg_type = 0; 1462 1463 memset(&msg, '\0', sizeof msg); 1464 msg.msg_name = NULL; 1465 msg.msg_namelen = 0; 1466 msg.msg_iov = iov; 1467 msg.msg_iovlen = 1; /* Only send the version at the first pass */ 1468 msg.msg_control = cmsgbuf; 1469 msg.msg_controllen = sizeof cmsgbuf; 1470 1471 log_Printf(LogDEBUG, "Expecting %u scatter/gather bytes\n", 1472 (unsigned)iov[0].iov_len); 1473 1474 if ((got = recvmsg(s, &msg, MSG_WAITALL)) != iov[0].iov_len) { 1475 if (got == -1) 1476 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); 1477 else 1478 log_Printf(LogERROR, "Failed recvmsg: Got %d, not %u\n", 1479 got, (unsigned)iov[0].iov_len); 1480 while (niov--) 1481 free(iov[niov].iov_base); 1482 return; 1483 } 1484 1485 if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { 1486 log_Printf(LogERROR, "Recvmsg: no descriptors received !\n"); 1487 while (niov--) 1488 free(iov[niov].iov_base); 1489 return; 1490 } 1491 1492 fd = (int *)(cmsg + 1); 1493 nfd = (cmsg->cmsg_len - sizeof *cmsg) / sizeof(int); 1494 1495 if (nfd < 2) { 1496 log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n", 1497 nfd, nfd == 1 ? "" : "s"); 1498 while (nfd--) 1499 close(fd[nfd]); 1500 while (niov--) 1501 free(iov[niov].iov_base); 1502 return; 1503 } 1504 1505 /* 1506 * We've successfully received two or more open file descriptors 1507 * through our socket, plus a version string. Make sure it's the 1508 * correct version, and drop the connection if it's not. 1509 */ 1510 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) { 1511 log_Printf(LogWARN, "Cannot receive datalink, incorrect version" 1512 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len, 1513 (char *)iov[0].iov_base, Version); 1514 while (nfd--) 1515 close(fd[nfd]); 1516 while (niov--) 1517 free(iov[niov].iov_base); 1518 return; 1519 } 1520 1521 /* 1522 * Everything looks good. Send the other side our process id so that 1523 * they can transfer lock ownership, and wait for them to send the 1524 * actual link data. 1525 */ 1526 pid = getpid(); 1527 if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) { 1528 if (got == -1) 1529 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1530 else 1531 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, 1532 (int)(sizeof pid)); 1533 while (nfd--) 1534 close(fd[nfd]); 1535 while (niov--) 1536 free(iov[niov].iov_base); 1537 return; 1538 } 1539 1540 if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) { 1541 if (got == -1) 1542 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1543 else 1544 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, expect); 1545 while (nfd--) 1546 close(fd[nfd]); 1547 while (niov--) 1548 free(iov[niov].iov_base); 1549 return; 1550 } 1551 close(fd[1]); 1552 1553 onfd = nfd; /* We've got this many in our array */ 1554 nfd -= 2; /* Don't include p->fd and our reply descriptor */ 1555 niov = 1; /* Skip the version id */ 1556 dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, fd[0], 1557 fd + 2, &nfd); 1558 if (dl) { 1559 1560 if (nfd) { 1561 log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d " 1562 "auxiliary file descriptors (%d remain)\n", onfd, nfd); 1563 datalink_Destroy(dl); 1564 while (nfd--) 1565 close(fd[onfd--]); 1566 close(fd[0]); 1567 } else { 1568 bundle_DatalinkLinkin(bundle, dl); 1569 datalink_AuthOk(dl); 1570 bundle_CalculateBandwidth(dl->bundle); 1571 } 1572 } else { 1573 while (nfd--) 1574 close(fd[onfd--]); 1575 close(fd[0]); 1576 close(fd[1]); 1577 } 1578 1579 free(iov[0].iov_base); 1580} 1581 1582void 1583bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun) 1584{ 1585 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1586 const char *constlock; 1587 char *lock; 1588 struct cmsghdr *cmsg; 1589 struct msghdr msg; 1590 struct iovec iov[SCATTER_SEGMENTS]; 1591 int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2], got; 1592 pid_t newpid; 1593 1594 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name); 1595 1596 /* Record the base device name for a lock transfer later */ 1597 constlock = physical_LockedDevice(dl->physical); 1598 if (constlock) { 1599 lock = alloca(strlen(constlock) + 1); 1600 strcpy(lock, constlock); 1601 } else 1602 lock = NULL; 1603 1604 bundle_LinkClosed(dl->bundle, dl); 1605 bundle_DatalinkLinkout(dl->bundle, dl); 1606 1607 /* Build our scatter/gather array */ 1608 iov[0].iov_len = strlen(Version) + 1; 1609 iov[0].iov_base = strdup(Version); 1610 niov = 1; 1611 nfd = 0; 1612 1613 fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd); 1614 1615 if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) { 1616 /* 1617 * fd[1] is used to get the peer process id back, then to confirm that 1618 * we've transferred any device locks to that process id. 1619 */ 1620 fd[1] = reply[1]; 1621 1622 nfd += 2; /* Include fd[0] and fd[1] */ 1623 memset(&msg, '\0', sizeof msg); 1624 1625 msg.msg_name = NULL; 1626 msg.msg_namelen = 0; 1627 /* 1628 * Only send the version to start... We used to send the whole lot, but 1629 * this caused problems with our RECVBUF size as a single link is about 1630 * 22k ! This way, we should bump into no limits. 1631 */ 1632 msg.msg_iovlen = 1; 1633 msg.msg_iov = iov; 1634 msg.msg_control = cmsgbuf; 1635 msg.msg_controllen = sizeof *cmsg + sizeof(int) * nfd; 1636 msg.msg_flags = 0; 1637 1638 cmsg = (struct cmsghdr *)cmsgbuf; 1639 cmsg->cmsg_len = msg.msg_controllen; 1640 cmsg->cmsg_level = SOL_SOCKET; 1641 cmsg->cmsg_type = SCM_RIGHTS; 1642 1643 for (f = 0; f < nfd; f++) 1644 *((int *)(cmsg + 1) + f) = fd[f]; 1645 1646 for (f = 1, expect = 0; f < niov; f++) 1647 expect += iov[f].iov_len; 1648 1649 if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1) 1650 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1651 strerror(errno)); 1652 if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1) 1653 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1654 strerror(errno)); 1655 1656 log_Printf(LogDEBUG, "Sending %d descriptor%s and %u bytes in scatter" 1657 "/gather array\n", nfd, nfd == 1 ? "" : "s", 1658 (unsigned)iov[0].iov_len); 1659 1660 if ((got = sendmsg(s, &msg, 0)) == -1) 1661 log_Printf(LogERROR, "Failed sendmsg: %s: %s\n", 1662 sun->sun_path, strerror(errno)); 1663 else if (got != iov[0].iov_len) 1664 log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %d of %u\n", 1665 sun->sun_path, got, (unsigned)iov[0].iov_len); 1666 else { 1667 /* We must get the ACK before closing the descriptor ! */ 1668 int res; 1669 1670 if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) { 1671 log_Printf(LogDEBUG, "Received confirmation from pid %d\n", 1672 (int)newpid); 1673 if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK) 1674 log_Printf(LogERROR, "uu_lock_txfr: %s\n", uu_lockerr(res)); 1675 1676 log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect); 1677 if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) { 1678 if (got == -1) 1679 log_Printf(LogERROR, "%s: Failed writev: %s\n", 1680 sun->sun_path, strerror(errno)); 1681 else 1682 log_Printf(LogERROR, "%s: Failed writev: Wrote %d of %d\n", 1683 sun->sun_path, got, expect); 1684 } 1685 } else if (got == -1) 1686 log_Printf(LogERROR, "%s: Failed socketpair read: %s\n", 1687 sun->sun_path, strerror(errno)); 1688 else 1689 log_Printf(LogERROR, "%s: Failed socketpair read: Got %d of %d\n", 1690 sun->sun_path, got, (int)(sizeof newpid)); 1691 } 1692 1693 close(reply[0]); 1694 close(reply[1]); 1695 1696 newsid = Enabled(dl->bundle, OPT_KEEPSESSION) || 1697 tcgetpgrp(fd[0]) == getpgrp(); 1698 while (nfd) 1699 close(fd[--nfd]); 1700 if (newsid) 1701 bundle_setsid(dl->bundle, got != -1); 1702 } 1703 close(s); 1704 1705 while (niov--) 1706 free(iov[niov].iov_base); 1707} 1708 1709int 1710bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl, 1711 const char *name) 1712{ 1713 struct datalink *dl; 1714 1715 if (!strcasecmp(ndl->name, name)) 1716 return 1; 1717 1718 for (dl = bundle->links; dl; dl = dl->next) 1719 if (!strcasecmp(dl->name, name)) 1720 return 0; 1721 1722 datalink_Rename(ndl, name); 1723 return 1; 1724} 1725 1726int 1727bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode) 1728{ 1729 int omode; 1730 1731 omode = dl->physical->type; 1732 if (omode == mode) 1733 return 1; 1734 1735 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO)) 1736 /* First auto link */ 1737 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) { 1738 log_Printf(LogWARN, "You must `set ifaddr' or `open' before" 1739 " changing mode to %s\n", mode2Nam(mode)); 1740 return 0; 1741 } 1742 1743 if (!datalink_SetMode(dl, mode)) 1744 return 0; 1745 1746 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) && 1747 bundle->phase != PHASE_NETWORK) 1748 /* First auto link, we need an interface */ 1749 ipcp_InterfaceUp(&bundle->ncp.ipcp); 1750 1751 /* Regenerate phys_type and adjust idle timer */ 1752 bundle_LinksRemoved(bundle); 1753 1754 return 1; 1755} 1756 1757void 1758bundle_setsid(struct bundle *bundle, int holdsession) 1759{ 1760 /* 1761 * Lose the current session. This means getting rid of our pid 1762 * too so that the tty device will really go away, and any getty 1763 * etc will be allowed to restart. 1764 */ 1765 pid_t pid, orig; 1766 int fds[2]; 1767 char done; 1768 struct datalink *dl; 1769 1770 if (!holdsession && bundle_IsDead(bundle)) { 1771 /* 1772 * No need to lose our session after all... we're going away anyway 1773 * 1774 * We should really stop the timer and pause if holdsession is set and 1775 * the bundle's dead, but that leaves other resources lying about :-( 1776 */ 1777 return; 1778 } 1779 1780 orig = getpid(); 1781 if (pipe(fds) == -1) { 1782 log_Printf(LogERROR, "pipe: %s\n", strerror(errno)); 1783 return; 1784 } 1785 switch ((pid = fork())) { 1786 case -1: 1787 log_Printf(LogERROR, "fork: %s\n", strerror(errno)); 1788 close(fds[0]); 1789 close(fds[1]); 1790 return; 1791 case 0: 1792 close(fds[1]); 1793 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1794 close(fds[0]); 1795 if (pipe(fds) == -1) { 1796 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno)); 1797 return; 1798 } 1799 switch ((pid = fork())) { 1800 case -1: 1801 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno)); 1802 close(fds[0]); 1803 close(fds[1]); 1804 return; 1805 case 0: 1806 close(fds[1]); 1807 bundle_LockTun(bundle); /* update pid */ 1808 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1809 close(fds[0]); 1810 setsid(); 1811 bundle_ChangedPID(bundle); 1812 log_Printf(LogDEBUG, "%d -> %d: %s session control\n", 1813 (int)orig, (int)getpid(), 1814 holdsession ? "Passed" : "Dropped"); 1815 timer_InitService(0); /* Start the Timer Service */ 1816 break; 1817 default: 1818 close(fds[0]); 1819 /* Give away all our physical locks (to the final process) */ 1820 for (dl = bundle->links; dl; dl = dl->next) 1821 if (dl->state != DATALINK_CLOSED) 1822 physical_ChangedPid(dl->physical, pid); 1823 write(fds[1], "!", 1); /* done */ 1824 close(fds[1]); 1825 _exit(0); 1826 break; 1827 } 1828 break; 1829 default: 1830 close(fds[0]); 1831 /* Give away all our physical locks (to the intermediate process) */ 1832 for (dl = bundle->links; dl; dl = dl->next) 1833 if (dl->state != DATALINK_CLOSED) 1834 physical_ChangedPid(dl->physical, pid); 1835 write(fds[1], "!", 1); /* done */ 1836 close(fds[1]); 1837 if (holdsession) { 1838 int fd, status; 1839 1840 timer_TermService(); 1841 signal(SIGPIPE, SIG_DFL); 1842 signal(SIGALRM, SIG_DFL); 1843 signal(SIGHUP, SIG_DFL); 1844 signal(SIGTERM, SIG_DFL); 1845 signal(SIGINT, SIG_DFL); 1846 signal(SIGQUIT, SIG_DFL); 1847 for (fd = getdtablesize(); fd >= 0; fd--) 1848 close(fd); 1849 /* 1850 * Reap the intermediate process. As we're not exiting but the 1851 * intermediate is, we don't want it to become defunct. 1852 */ 1853 waitpid(pid, &status, 0); 1854 /* Tweak our process arguments.... */ 1855 ID0setproctitle("session owner"); 1856 setuid(ID0realuid()); 1857 /* 1858 * Hang around for a HUP. This should happen as soon as the 1859 * ppp that we passed our ctty descriptor to closes it. 1860 * NOTE: If this process dies, the passed descriptor becomes 1861 * invalid and will give a select() error by setting one 1862 * of the error fds, aborting the other ppp. We don't 1863 * want that to happen ! 1864 */ 1865 pause(); 1866 } 1867 _exit(0); 1868 break; 1869 } 1870} 1871 1872int 1873bundle_HighestState(struct bundle *bundle) 1874{ 1875 struct datalink *dl; 1876 int result = DATALINK_CLOSED; 1877 1878 for (dl = bundle->links; dl; dl = dl->next) 1879 if (result < dl->state) 1880 result = dl->state; 1881 1882 return result; 1883} 1884 1885int 1886bundle_Exception(struct bundle *bundle, int fd) 1887{ 1888 struct datalink *dl; 1889 1890 for (dl = bundle->links; dl; dl = dl->next) 1891 if (dl->physical->fd == fd) { 1892 datalink_Down(dl, CLOSE_NORMAL); 1893 return 1; 1894 } 1895 1896 return 0; 1897} 1898 1899void 1900bundle_AdjustFilters(struct bundle *bundle, struct in_addr *my_ip, 1901 struct in_addr *peer_ip) 1902{ 1903 filter_AdjustAddr(&bundle->filter.in, my_ip, peer_ip, NULL); 1904 filter_AdjustAddr(&bundle->filter.out, my_ip, peer_ip, NULL); 1905 filter_AdjustAddr(&bundle->filter.dial, my_ip, peer_ip, NULL); 1906 filter_AdjustAddr(&bundle->filter.alive, my_ip, peer_ip, NULL); 1907} 1908 1909void 1910bundle_AdjustDNS(struct bundle *bundle, struct in_addr dns[2]) 1911{ 1912 filter_AdjustAddr(&bundle->filter.in, NULL, NULL, dns); 1913 filter_AdjustAddr(&bundle->filter.out, NULL, NULL, dns); 1914 filter_AdjustAddr(&bundle->filter.dial, NULL, NULL, dns); 1915 filter_AdjustAddr(&bundle->filter.alive, NULL, NULL, dns); 1916} 1917 1918void 1919bundle_CalculateBandwidth(struct bundle *bundle) 1920{ 1921 struct datalink *dl; 1922 int mtu, sp; 1923 1924 bundle->bandwidth = 0; 1925 mtu = 0; 1926 for (dl = bundle->links; dl; dl = dl->next) 1927 if (dl->state == DATALINK_OPEN) { 1928 if ((sp = dl->mp.bandwidth) == 0 && 1929 (sp = physical_GetSpeed(dl->physical)) == 0) 1930 log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n", 1931 dl->name, dl->physical->name.full); 1932 else 1933 bundle->bandwidth += sp; 1934 if (!bundle->ncp.mp.active) { 1935 mtu = dl->physical->link.lcp.his_mru; 1936 break; 1937 } 1938 } 1939 1940 if(bundle->bandwidth == 0) 1941 bundle->bandwidth = 115200; /* Shrug */ 1942 1943 if (bundle->ncp.mp.active) 1944 mtu = bundle->ncp.mp.peer_mrru; 1945 else if (!mtu) 1946 mtu = 1500; 1947 1948#ifndef NORADIUS 1949 if (bundle->radius.valid && bundle->radius.mtu && bundle->radius.mtu < mtu) { 1950 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n", 1951 bundle->radius.mtu); 1952 mtu = bundle->radius.mtu; 1953 } 1954#endif 1955 1956 tun_configure(bundle, mtu); 1957} 1958 1959void 1960bundle_AutoAdjust(struct bundle *bundle, int percent, int what) 1961{ 1962 struct datalink *dl, *choice, *otherlinkup; 1963 1964 choice = otherlinkup = NULL; 1965 for (dl = bundle->links; dl; dl = dl->next) 1966 if (dl->physical->type == PHYS_AUTO) { 1967 if (dl->state == DATALINK_OPEN) { 1968 if (what == AUTO_DOWN) { 1969 if (choice) 1970 otherlinkup = choice; 1971 choice = dl; 1972 } 1973 } else if (dl->state == DATALINK_CLOSED) { 1974 if (what == AUTO_UP) { 1975 choice = dl; 1976 break; 1977 } 1978 } else { 1979 /* An auto link in an intermediate state - forget it for the moment */ 1980 choice = NULL; 1981 break; 1982 } 1983 } else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN) 1984 otherlinkup = dl; 1985 1986 if (choice) { 1987 if (what == AUTO_UP) { 1988 log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n", 1989 percent, choice->name); 1990 datalink_Up(choice, 1, 1); 1991 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1992 } else if (otherlinkup) { /* Only bring the second-last link down */ 1993 log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n", 1994 percent, choice->name); 1995 datalink_Close(choice, CLOSE_STAYDOWN); 1996 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1997 } 1998 } 1999} 2000 2001int 2002bundle_WantAutoloadTimer(struct bundle *bundle) 2003{ 2004 struct datalink *dl; 2005 int autolink, opened; 2006 2007 if (bundle->phase == PHASE_NETWORK) { 2008 for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next) 2009 if (dl->physical->type == PHYS_AUTO) { 2010 if (++autolink == 2 || (autolink == 1 && opened)) 2011 /* Two auto links or one auto and one open in NETWORK phase */ 2012 return 1; 2013 } else if (dl->state == DATALINK_OPEN) { 2014 opened++; 2015 if (autolink) 2016 /* One auto and one open link in NETWORK phase */ 2017 return 1; 2018 } 2019 } 2020 2021 return 0; 2022} 2023 2024void 2025bundle_ChangedPID(struct bundle *bundle) 2026{ 2027#ifdef TUNSIFPID 2028 ioctl(bundle->dev.fd, TUNSIFPID, 0); 2029#endif 2030} 2031