1 /*- 2 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/usr.sbin/ppp/bundle.c,v 1.84.2.12 2002/09/01 02:12:22 brian Exp $ 27 * $DragonFly: src/usr.sbin/ppp/bundle.c,v 1.5 2005/11/24 23:42:54 swildner Exp $ 28 */ 29 30 #include <sys/param.h> 31 #include <sys/socket.h> 32 #include <netinet/in.h> 33 #include <net/if.h> 34 #include <net/tun/if_tun.h> /* For TUNS* ioctls */ 35 #include <net/route.h> 36 #include <netinet/in_systm.h> 37 #include <netinet/ip.h> 38 #include <sys/un.h> 39 40 #include <errno.h> 41 #include <fcntl.h> 42 #ifdef __OpenBSD__ 43 #include <util.h> 44 #else 45 #include <libutil.h> 46 #endif 47 #include <paths.h> 48 #include <stdarg.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <sys/uio.h> 53 #include <sys/wait.h> 54 #include <termios.h> 55 #include <unistd.h> 56 57 #include "layer.h" 58 #include "defs.h" 59 #include "command.h" 60 #include "mbuf.h" 61 #include "log.h" 62 #include "id.h" 63 #include "timer.h" 64 #include "fsm.h" 65 #include "iplist.h" 66 #include "lqr.h" 67 #include "hdlc.h" 68 #include "throughput.h" 69 #include "slcompress.h" 70 #include "ncpaddr.h" 71 #include "ip.h" 72 #include "ipcp.h" 73 #include "filter.h" 74 #include "descriptor.h" 75 #include "route.h" 76 #include "lcp.h" 77 #include "ccp.h" 78 #include "link.h" 79 #include "mp.h" 80 #ifndef NORADIUS 81 #include "radius.h" 82 #endif 83 #include "ipv6cp.h" 84 #include "ncp.h" 85 #include "bundle.h" 86 #include "async.h" 87 #include "physical.h" 88 #include "auth.h" 89 #include "proto.h" 90 #include "chap.h" 91 #include "tun.h" 92 #include "prompt.h" 93 #include "chat.h" 94 #include "cbcp.h" 95 #include "datalink.h" 96 #include "iface.h" 97 #include "server.h" 98 #include "probe.h" 99 #ifndef NODES 100 #include "mppe.h" 101 #endif 102 103 #define SCATTER_SEGMENTS 7 /* version, datalink, name, physical, 104 throughput, throughput, device */ 105 106 #define SEND_MAXFD 3 /* Max file descriptors passed through 107 the local domain socket */ 108 109 static int bundle_RemainingIdleTime(struct bundle *); 110 111 static const char * const PhaseNames[] = { 112 "Dead", "Establish", "Authenticate", "Network", "Terminate" 113 }; 114 115 const char * 116 bundle_PhaseName(struct bundle *bundle) 117 { 118 return bundle->phase <= PHASE_TERMINATE ? 119 PhaseNames[bundle->phase] : "unknown"; 120 } 121 122 void 123 bundle_NewPhase(struct bundle *bundle, u_int new) 124 { 125 if (new == bundle->phase) 126 return; 127 128 if (new <= PHASE_TERMINATE) 129 log_Printf(LogPHASE, "bundle: %s\n", PhaseNames[new]); 130 131 switch (new) { 132 case PHASE_DEAD: 133 bundle->phase = new; 134 #ifndef NODES 135 MPPE_MasterKeyValid = 0; 136 #endif 137 log_DisplayPrompts(); 138 break; 139 140 case PHASE_ESTABLISH: 141 bundle->phase = new; 142 break; 143 144 case PHASE_AUTHENTICATE: 145 bundle->phase = new; 146 log_DisplayPrompts(); 147 break; 148 149 case PHASE_NETWORK: 150 if (ncp_fsmStart(&bundle->ncp, bundle)) { 151 bundle->phase = new; 152 log_DisplayPrompts(); 153 } else { 154 log_Printf(LogPHASE, "bundle: All NCPs are disabled\n"); 155 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 156 } 157 break; 158 159 case PHASE_TERMINATE: 160 bundle->phase = new; 161 mp_Down(&bundle->ncp.mp); 162 log_DisplayPrompts(); 163 break; 164 } 165 } 166 167 static void 168 bundle_LayerStart(void *v __unused, struct fsm *fp __unused) 169 { 170 /* The given FSM is about to start up ! */ 171 } 172 173 174 void 175 bundle_Notify(struct bundle *bundle, char c) 176 { 177 if (bundle->notify.fd != -1) { 178 int ret; 179 180 ret = write(bundle->notify.fd, &c, 1); 181 if (c != EX_REDIAL && c != EX_RECONNECT) { 182 if (ret == 1) 183 log_Printf(LogCHAT, "Parent notified of %s\n", 184 c == EX_NORMAL ? "success" : "failure"); 185 else 186 log_Printf(LogERROR, "Failed to notify parent of success\n"); 187 close(bundle->notify.fd); 188 bundle->notify.fd = -1; 189 } else if (ret == 1) 190 log_Printf(LogCHAT, "Parent notified of %s\n", ex_desc(c)); 191 else 192 log_Printf(LogERROR, "Failed to notify parent of %s\n", ex_desc(c)); 193 } 194 } 195 196 static void 197 bundle_ClearQueues(void *v) 198 { 199 struct bundle *bundle = (struct bundle *)v; 200 struct datalink *dl; 201 202 log_Printf(LogPHASE, "Clearing choked output queue\n"); 203 timer_Stop(&bundle->choked.timer); 204 205 /* 206 * Emergency time: 207 * 208 * We've had a full queue for PACKET_DEL_SECS seconds without being 209 * able to get rid of any of the packets. We've probably given up 210 * on the redials at this point, and the queued data has almost 211 * definitely been timed out by the layer above. As this is preventing 212 * us from reading the TUN_NAME device (we don't want to buffer stuff 213 * indefinitely), we may as well nuke this data and start with a clean 214 * slate ! 215 * 216 * Unfortunately, this has the side effect of shafting any compression 217 * dictionaries in use (causing the relevant RESET_REQ/RESET_ACK). 218 */ 219 220 ncp_DeleteQueues(&bundle->ncp); 221 for (dl = bundle->links; dl; dl = dl->next) 222 physical_DeleteQueue(dl->physical); 223 } 224 225 static void 226 bundle_LinkAdded(struct bundle *bundle, struct datalink *dl) 227 { 228 bundle->phys_type.all |= dl->physical->type; 229 if (dl->state == DATALINK_OPEN) 230 bundle->phys_type.open |= dl->physical->type; 231 232 #ifndef NORADIUS 233 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 234 != bundle->phys_type.open && bundle->session.timer.state == TIMER_STOPPED) 235 if (bundle->radius.sessiontime) 236 bundle_StartSessionTimer(bundle, 0); 237 #endif 238 239 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 240 != bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED) 241 /* We may need to start our idle timer */ 242 bundle_StartIdleTimer(bundle, 0); 243 } 244 245 void 246 bundle_LinksRemoved(struct bundle *bundle) 247 { 248 struct datalink *dl; 249 250 bundle->phys_type.all = bundle->phys_type.open = 0; 251 for (dl = bundle->links; dl; dl = dl->next) 252 bundle_LinkAdded(bundle, dl); 253 254 bundle_CalculateBandwidth(bundle); 255 mp_CheckAutoloadTimer(&bundle->ncp.mp); 256 257 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 258 == bundle->phys_type.open) { 259 #ifndef NORADIUS 260 if (bundle->radius.sessiontime) 261 bundle_StopSessionTimer(bundle); 262 #endif 263 bundle_StopIdleTimer(bundle); 264 } 265 } 266 267 static void 268 bundle_LayerUp(void *v, struct fsm *fp) 269 { 270 /* 271 * The given fsm is now up 272 * If it's an LCP, adjust our phys_mode.open value and check the 273 * autoload timer. 274 * If it's the first NCP, calculate our bandwidth 275 * If it's the first NCP, set our ``upat'' time 276 * If it's the first NCP, start the idle timer. 277 * If it's an NCP, tell our -background parent to go away. 278 * If it's the first NCP, start the autoload timer 279 */ 280 struct bundle *bundle = (struct bundle *)v; 281 282 if (fp->proto == PROTO_LCP) { 283 struct physical *p = link2physical(fp->link); 284 285 bundle_LinkAdded(bundle, p->dl); 286 mp_CheckAutoloadTimer(&bundle->ncp.mp); 287 } else if (isncp(fp->proto)) { 288 if (ncp_LayersOpen(&fp->bundle->ncp) == 1) { 289 bundle_CalculateBandwidth(fp->bundle); 290 time(&bundle->upat); 291 #ifndef NORADIUS 292 if (bundle->radius.sessiontime) 293 bundle_StartSessionTimer(bundle, 0); 294 #endif 295 bundle_StartIdleTimer(bundle, 0); 296 mp_CheckAutoloadTimer(&fp->bundle->ncp.mp); 297 } 298 bundle_Notify(bundle, EX_NORMAL); 299 } else if (fp->proto == PROTO_CCP) 300 bundle_CalculateBandwidth(fp->bundle); /* Against ccp_MTUOverhead */ 301 } 302 303 static void 304 bundle_LayerDown(void *v, struct fsm *fp) 305 { 306 /* 307 * The given FSM has been told to come down. 308 * If it's our last NCP, stop the idle timer. 309 * If it's our last NCP, clear our ``upat'' value. 310 * If it's our last NCP, stop the autoload timer 311 * If it's an LCP, adjust our phys_type.open value and any timers. 312 * If it's an LCP and we're in multilink mode, adjust our tun 313 * If it's the last LCP, down all NCPs 314 * speed and make sure our minimum sequence number is adjusted. 315 */ 316 317 struct bundle *bundle = (struct bundle *)v; 318 319 if (isncp(fp->proto)) { 320 if (ncp_LayersOpen(&fp->bundle->ncp) == 0) { 321 #ifndef NORADIUS 322 if (bundle->radius.sessiontime) 323 bundle_StopSessionTimer(bundle); 324 #endif 325 bundle_StopIdleTimer(bundle); 326 bundle->upat = 0; 327 mp_StopAutoloadTimer(&bundle->ncp.mp); 328 } 329 } else if (fp->proto == PROTO_LCP) { 330 struct datalink *dl; 331 struct datalink *lost; 332 int others_active; 333 334 bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */ 335 336 lost = NULL; 337 others_active = 0; 338 for (dl = bundle->links; dl; dl = dl->next) { 339 if (fp == &dl->physical->link.lcp.fsm) 340 lost = dl; 341 else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 342 others_active++; 343 } 344 345 if (bundle->ncp.mp.active) { 346 bundle_CalculateBandwidth(bundle); 347 348 if (lost) 349 mp_LinkLost(&bundle->ncp.mp, lost); 350 else 351 log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n", 352 fp->link->name); 353 } 354 355 if (!others_active) { 356 /* Down the NCPs. We don't expect to get fsm_Close()d ourself ! */ 357 ncp2initial(&bundle->ncp); 358 mp_Down(&bundle->ncp.mp); 359 } 360 } 361 } 362 363 static void 364 bundle_LayerFinish(void *v, struct fsm *fp) 365 { 366 /* The given fsm is now down (fp cannot be NULL) 367 * 368 * If it's the last NCP, fsm_Close all LCPs 369 * If it's the last NCP, bring any MP layer down 370 */ 371 372 struct bundle *bundle = (struct bundle *)v; 373 struct datalink *dl; 374 375 if (isncp(fp->proto) && !ncp_LayersUnfinished(&bundle->ncp)) { 376 if (bundle_Phase(bundle) != PHASE_DEAD) 377 bundle_NewPhase(bundle, PHASE_TERMINATE); 378 for (dl = bundle->links; dl; dl = dl->next) 379 if (dl->state == DATALINK_OPEN) 380 datalink_Close(dl, CLOSE_STAYDOWN); 381 fsm2initial(fp); 382 mp_Down(&bundle->ncp.mp); 383 } 384 } 385 386 void 387 bundle_Close(struct bundle *bundle, const char *name, int how) 388 { 389 /* 390 * Please close the given datalink. 391 * If name == NULL or name is the last datalink, fsm_Close all NCPs 392 * (except our MP) 393 * If it isn't the last datalink, just Close that datalink. 394 */ 395 396 struct datalink *dl, *this_dl; 397 int others_active; 398 399 others_active = 0; 400 this_dl = NULL; 401 402 for (dl = bundle->links; dl; dl = dl->next) { 403 if (name && !strcasecmp(name, dl->name)) 404 this_dl = dl; 405 if (name == NULL || this_dl == dl) { 406 switch (how) { 407 case CLOSE_LCP: 408 datalink_DontHangup(dl); 409 break; 410 case CLOSE_STAYDOWN: 411 datalink_StayDown(dl); 412 break; 413 } 414 } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 415 others_active++; 416 } 417 418 if (name && this_dl == NULL) { 419 log_Printf(LogWARN, "%s: Invalid datalink name\n", name); 420 return; 421 } 422 423 if (!others_active) { 424 #ifndef NORADIUS 425 if (bundle->radius.sessiontime) 426 bundle_StopSessionTimer(bundle); 427 #endif 428 bundle_StopIdleTimer(bundle); 429 if (ncp_LayersUnfinished(&bundle->ncp)) 430 ncp_Close(&bundle->ncp); 431 else { 432 ncp2initial(&bundle->ncp); 433 mp_Down(&bundle->ncp.mp); 434 for (dl = bundle->links; dl; dl = dl->next) 435 datalink_Close(dl, how); 436 } 437 } else if (this_dl && this_dl->state != DATALINK_CLOSED && 438 this_dl->state != DATALINK_HANGUP) 439 datalink_Close(this_dl, how); 440 } 441 442 void 443 bundle_Down(struct bundle *bundle, int how) 444 { 445 struct datalink *dl; 446 447 for (dl = bundle->links; dl; dl = dl->next) 448 datalink_Down(dl, how); 449 } 450 451 static int 452 bundle_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 453 { 454 struct bundle *bundle = descriptor2bundle(d); 455 struct datalink *dl; 456 int result, nlinks; 457 u_short ifqueue; 458 size_t queued; 459 460 result = 0; 461 462 /* If there are aren't many packets queued, look for some more. */ 463 for (nlinks = 0, dl = bundle->links; dl; dl = dl->next) 464 nlinks++; 465 466 if (nlinks) { 467 queued = r ? ncp_FillPhysicalQueues(&bundle->ncp, bundle) : 468 ncp_QueueLen(&bundle->ncp); 469 470 if (r && (bundle->phase == PHASE_NETWORK || 471 bundle->phys_type.all & PHYS_AUTO)) { 472 /* enough surplus so that we can tell if we're getting swamped */ 473 ifqueue = nlinks > bundle->cfg.ifqueue ? nlinks : bundle->cfg.ifqueue; 474 if (queued < ifqueue) { 475 /* Not enough - select() for more */ 476 if (bundle->choked.timer.state == TIMER_RUNNING) 477 timer_Stop(&bundle->choked.timer); /* Not needed any more */ 478 FD_SET(bundle->dev.fd, r); 479 if (*n < bundle->dev.fd + 1) 480 *n = bundle->dev.fd + 1; 481 log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd); 482 result++; 483 } else if (bundle->choked.timer.state == TIMER_STOPPED) { 484 bundle->choked.timer.func = bundle_ClearQueues; 485 bundle->choked.timer.name = "output choke"; 486 bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS; 487 bundle->choked.timer.arg = bundle; 488 timer_Start(&bundle->choked.timer); 489 } 490 } 491 } 492 493 #ifndef NORADIUS 494 result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n); 495 #endif 496 497 /* Which links need a select() ? */ 498 for (dl = bundle->links; dl; dl = dl->next) 499 result += descriptor_UpdateSet(&dl->desc, r, w, e, n); 500 501 /* 502 * This *MUST* be called after the datalink UpdateSet()s as it 503 * might be ``holding'' one of the datalinks (death-row) and 504 * wants to be able to de-select() it from the descriptor set. 505 */ 506 result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n); 507 508 return result; 509 } 510 511 static int 512 bundle_IsSet(struct fdescriptor *d, const fd_set *fdset) 513 { 514 struct bundle *bundle = descriptor2bundle(d); 515 struct datalink *dl; 516 517 for (dl = bundle->links; dl; dl = dl->next) 518 if (descriptor_IsSet(&dl->desc, fdset)) 519 return 1; 520 521 #ifndef NORADIUS 522 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 523 return 1; 524 #endif 525 526 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 527 return 1; 528 529 return FD_ISSET(bundle->dev.fd, fdset); 530 } 531 532 static void 533 bundle_DescriptorRead(struct fdescriptor *d __unused, struct bundle *bundle, 534 const fd_set *fdset) 535 { 536 struct datalink *dl; 537 unsigned secs; 538 u_int32_t af; 539 540 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 541 descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset); 542 543 for (dl = bundle->links; dl; dl = dl->next) 544 if (descriptor_IsSet(&dl->desc, fdset)) 545 descriptor_Read(&dl->desc, bundle, fdset); 546 547 #ifndef NORADIUS 548 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 549 descriptor_Read(&bundle->radius.desc, bundle, fdset); 550 #endif 551 552 if (FD_ISSET(bundle->dev.fd, fdset)) { 553 struct tun_data tun; 554 int n, pri; 555 u_char *data; 556 size_t sz; 557 558 if (bundle->dev.header) { 559 data = (u_char *)&tun; 560 sz = sizeof tun; 561 } else { 562 data = tun.data; 563 sz = sizeof tun.data; 564 } 565 566 /* something to read from tun */ 567 568 n = read(bundle->dev.fd, data, sz); 569 if (n < 0) { 570 log_Printf(LogWARN, "%s: read: %s\n", bundle->dev.Name, strerror(errno)); 571 return; 572 } 573 574 if (bundle->dev.header) { 575 n -= sz - sizeof tun.data; 576 if (n <= 0) { 577 log_Printf(LogERROR, "%s: read: Got only %d bytes of data !\n", 578 bundle->dev.Name, n); 579 return; 580 } 581 af = ntohl(tun.header.family); 582 #ifndef NOINET6 583 if (af != AF_INET && af != AF_INET6) 584 #else 585 if (af != AF_INET) 586 #endif 587 /* XXX: Should be maintaining drop/family counts ! */ 588 return; 589 } else 590 af = AF_INET; 591 592 if (af == AF_INET && ((struct ip *)tun.data)->ip_dst.s_addr == 593 bundle->ncp.ipcp.my_ip.s_addr) { 594 /* we've been asked to send something addressed *to* us :( */ 595 if (Enabled(bundle, OPT_LOOPBACK)) { 596 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.in, 597 NULL, NULL); 598 if (pri >= 0) { 599 n += sz - sizeof tun.data; 600 write(bundle->dev.fd, data, n); 601 log_Printf(LogDEBUG, "Looped back packet addressed to myself\n"); 602 } 603 return; 604 } else 605 log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n"); 606 } 607 608 /* 609 * Process on-demand dialup. Output packets are queued within the tunnel 610 * device until the appropriate NCP is opened. 611 */ 612 613 if (bundle_Phase(bundle) == PHASE_DEAD) { 614 /* 615 * Note, we must be in AUTO mode :-/ otherwise our interface should 616 * *not* be UP and we can't receive data 617 */ 618 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.dial, 619 NULL, NULL); 620 if (pri >= 0) 621 bundle_Open(bundle, NULL, PHYS_AUTO, 0); 622 else 623 /* 624 * Drop the packet. If we were to queue it, we'd just end up with 625 * a pile of timed-out data in our output queue by the time we get 626 * around to actually dialing. We'd also prematurely reach the 627 * threshold at which we stop select()ing to read() the tun 628 * device - breaking auto-dial. 629 */ 630 return; 631 } 632 633 secs = 0; 634 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.out, 635 NULL, &secs); 636 if (pri >= 0) { 637 /* Prepend the number of seconds timeout given in the filter */ 638 tun.header.timeout = secs; 639 ncp_Enqueue(&bundle->ncp, af, pri, (char *)&tun, n + sizeof tun.header); 640 } 641 } 642 } 643 644 static int 645 bundle_DescriptorWrite(struct fdescriptor *d __unused, struct bundle *bundle, 646 const fd_set *fdset) 647 { 648 struct datalink *dl; 649 int result = 0; 650 651 /* This is not actually necessary as struct mpserver doesn't Write() */ 652 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 653 if (descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset) == 1) 654 result++; 655 656 for (dl = bundle->links; dl; dl = dl->next) 657 if (descriptor_IsSet(&dl->desc, fdset)) 658 switch (descriptor_Write(&dl->desc, bundle, fdset)) { 659 case -1: 660 datalink_ComeDown(dl, CLOSE_NORMAL); 661 break; 662 case 1: 663 result++; 664 } 665 666 return result; 667 } 668 669 void 670 bundle_LockTun(struct bundle *bundle) 671 { 672 FILE *lockfile; 673 char pidfilename[PATH_MAX]; 674 675 snprintf(pidfilename, sizeof pidfilename, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 676 lockfile = ID0fopen(pidfilename, "w"); 677 if (lockfile != NULL) { 678 fprintf(lockfile, "%d\n", (int)getpid()); 679 fclose(lockfile); 680 } 681 else 682 log_Printf(LogERROR, "Warning: Can't create %s: %s\n", 683 pidfilename, strerror(errno)); 684 } 685 686 static void 687 bundle_UnlockTun(struct bundle *bundle) 688 { 689 char pidfilename[PATH_MAX]; 690 691 snprintf(pidfilename, sizeof pidfilename, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 692 ID0unlink(pidfilename); 693 } 694 695 struct bundle * 696 bundle_Create(const char *prefix, int type, int unit) 697 { 698 static struct bundle bundle; /* there can be only one */ 699 int enoentcount, err, minunit, maxunit; 700 const char *ifname; 701 #if defined(__DragonFly__) && !defined(NOKLDLOAD) 702 int kldtried; 703 #endif 704 #if defined(TUNSIFMODE) || defined(TUNSLMODE) || defined(TUNSIFHEAD) 705 int iff; 706 #endif 707 708 if (bundle.iface != NULL) { /* Already allocated ! */ 709 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n"); 710 return NULL; 711 } 712 713 if (unit == -1) { 714 minunit = 0; 715 maxunit = -1; 716 } else { 717 minunit = unit; 718 maxunit = unit + 1; 719 } 720 err = ENOENT; 721 enoentcount = 0; 722 #if defined(__DragonFly__) && !defined(NOKLDLOAD) 723 kldtried = 0; 724 #endif 725 for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) { 726 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d", 727 prefix, bundle.unit); 728 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR); 729 if (bundle.dev.fd >= 0) 730 break; 731 else if (errno == ENXIO || errno == ENOENT) { 732 #if defined(__DragonFly__) && !defined(NOKLDLOAD) 733 if (bundle.unit == minunit && !kldtried++) { 734 /* 735 * Attempt to load the tunnel interface KLD if it isn't loaded 736 * already. 737 */ 738 if (loadmodules(LOAD_VERBOSLY, "if_tun", NULL)) 739 bundle.unit--; 740 continue; 741 } 742 #endif 743 if (errno != ENOENT || ++enoentcount > 2) { 744 err = errno; 745 break; 746 } 747 } else 748 err = errno; 749 } 750 751 if (bundle.dev.fd < 0) { 752 if (unit == -1) 753 log_Printf(LogWARN, "No available tunnel devices found (%s)\n", 754 strerror(err)); 755 else 756 log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err)); 757 return NULL; 758 } 759 760 log_SetTun(bundle.unit); 761 762 ifname = strrchr(bundle.dev.Name, '/'); 763 if (ifname == NULL) 764 ifname = bundle.dev.Name; 765 else 766 ifname++; 767 768 bundle.iface = iface_Create(ifname); 769 if (bundle.iface == NULL) { 770 close(bundle.dev.fd); 771 return NULL; 772 } 773 774 #ifdef TUNSIFMODE 775 /* Make sure we're POINTOPOINT & IFF_MULTICAST */ 776 iff = IFF_POINTOPOINT | IFF_MULTICAST; 777 if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0) 778 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n", 779 strerror(errno)); 780 #endif 781 782 #ifdef TUNSLMODE 783 /* Make sure we're not prepending sockaddrs */ 784 iff = 0; 785 if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0) 786 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n", 787 strerror(errno)); 788 #endif 789 790 #ifdef TUNSIFHEAD 791 /* We want the address family please ! */ 792 iff = 1; 793 if (ID0ioctl(bundle.dev.fd, TUNSIFHEAD, &iff) < 0) { 794 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFHEAD): %s\n", 795 strerror(errno)); 796 bundle.dev.header = 0; 797 } else 798 bundle.dev.header = 1; 799 #else 800 #ifdef __OpenBSD__ 801 /* Always present for OpenBSD */ 802 bundle.dev.header = 1; 803 #else 804 /* 805 * If TUNSIFHEAD isn't available and we're not OpenBSD, assume 806 * everything's AF_INET (hopefully the tun device won't pass us 807 * anything else !). 808 */ 809 bundle.dev.header = 0; 810 #endif 811 #endif 812 813 log_Printf(LogPHASE, "Using interface: %s\n", ifname); 814 815 bundle.bandwidth = 0; 816 bundle.routing_seq = 0; 817 bundle.phase = PHASE_DEAD; 818 bundle.CleaningUp = 0; 819 bundle.NatEnabled = 0; 820 821 bundle.fsm.LayerStart = bundle_LayerStart; 822 bundle.fsm.LayerUp = bundle_LayerUp; 823 bundle.fsm.LayerDown = bundle_LayerDown; 824 bundle.fsm.LayerFinish = bundle_LayerFinish; 825 bundle.fsm.object = &bundle; 826 827 bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT; 828 bundle.cfg.idle.min_timeout = 0; 829 *bundle.cfg.auth.name = '\0'; 830 *bundle.cfg.auth.key = '\0'; 831 bundle.cfg.opt = OPT_IDCHECK | OPT_LOOPBACK | OPT_SROUTES | OPT_TCPMSSFIXUP | 832 OPT_THROUGHPUT | OPT_UTMP; 833 #ifndef NOINET6 834 bundle.cfg.opt |= OPT_IPCP; 835 if (probe.ipv6_available) 836 bundle.cfg.opt |= OPT_IPV6CP; 837 #endif 838 *bundle.cfg.label = '\0'; 839 bundle.cfg.ifqueue = DEF_IFQUEUE; 840 bundle.cfg.choked.timeout = CHOKED_TIMEOUT; 841 bundle.phys_type.all = type; 842 bundle.phys_type.open = 0; 843 bundle.upat = 0; 844 845 bundle.links = datalink_Create("deflink", &bundle, type); 846 if (bundle.links == NULL) { 847 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno)); 848 iface_Destroy(bundle.iface); 849 bundle.iface = NULL; 850 close(bundle.dev.fd); 851 return NULL; 852 } 853 854 bundle.desc.type = BUNDLE_DESCRIPTOR; 855 bundle.desc.UpdateSet = bundle_UpdateSet; 856 bundle.desc.IsSet = bundle_IsSet; 857 bundle.desc.Read = bundle_DescriptorRead; 858 bundle.desc.Write = bundle_DescriptorWrite; 859 860 ncp_Init(&bundle.ncp, &bundle); 861 862 memset(&bundle.filter, '\0', sizeof bundle.filter); 863 bundle.filter.in.fragok = bundle.filter.in.logok = 1; 864 bundle.filter.in.name = "IN"; 865 bundle.filter.out.fragok = bundle.filter.out.logok = 1; 866 bundle.filter.out.name = "OUT"; 867 bundle.filter.dial.name = "DIAL"; 868 bundle.filter.dial.logok = 1; 869 bundle.filter.alive.name = "ALIVE"; 870 bundle.filter.alive.logok = 1; 871 { 872 int i; 873 for (i = 0; i < MAXFILTERS; i++) { 874 bundle.filter.in.rule[i].f_action = A_NONE; 875 bundle.filter.out.rule[i].f_action = A_NONE; 876 bundle.filter.dial.rule[i].f_action = A_NONE; 877 bundle.filter.alive.rule[i].f_action = A_NONE; 878 } 879 } 880 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer); 881 bundle.idle.done = 0; 882 bundle.notify.fd = -1; 883 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer); 884 #ifndef NORADIUS 885 radius_Init(&bundle.radius); 886 #endif 887 888 /* Clean out any leftover crud */ 889 iface_Clear(bundle.iface, &bundle.ncp, 0, IFACE_CLEAR_ALL); 890 891 bundle_LockTun(&bundle); 892 893 return &bundle; 894 } 895 896 static void 897 bundle_DownInterface(struct bundle *bundle) 898 { 899 route_IfDelete(bundle, 1); 900 iface_ClearFlags(bundle->iface->name, IFF_UP); 901 } 902 903 void 904 bundle_Destroy(struct bundle *bundle) 905 { 906 struct datalink *dl; 907 908 /* 909 * Clean up the interface. We don't really need to do the timer_Stop()s, 910 * mp_Down(), iface_Clear() and bundle_DownInterface() unless we're getting 911 * out under exceptional conditions such as a descriptor exception. 912 */ 913 timer_Stop(&bundle->idle.timer); 914 timer_Stop(&bundle->choked.timer); 915 mp_Down(&bundle->ncp.mp); 916 iface_Clear(bundle->iface, &bundle->ncp, 0, IFACE_CLEAR_ALL); 917 bundle_DownInterface(bundle); 918 919 #ifndef NORADIUS 920 /* Tell the radius server the bad news */ 921 radius_Destroy(&bundle->radius); 922 #endif 923 924 /* Again, these are all DATALINK_CLOSED unless we're abending */ 925 dl = bundle->links; 926 while (dl) 927 dl = datalink_Destroy(dl); 928 929 ncp_Destroy(&bundle->ncp); 930 931 close(bundle->dev.fd); 932 bundle_UnlockTun(bundle); 933 934 /* In case we never made PHASE_NETWORK */ 935 bundle_Notify(bundle, EX_ERRDEAD); 936 937 iface_Destroy(bundle->iface); 938 bundle->iface = NULL; 939 } 940 941 void 942 bundle_LinkClosed(struct bundle *bundle, struct datalink *dl) 943 { 944 /* 945 * Our datalink has closed. 946 * CleanDatalinks() (called from DoLoop()) will remove closed 947 * BACKGROUND, FOREGROUND and DIRECT links. 948 * If it's the last data link, enter phase DEAD. 949 * 950 * NOTE: dl may not be in our list (bundle_SendDatalink()) ! 951 */ 952 953 struct datalink *odl; 954 int other_links; 955 956 log_SetTtyCommandMode(dl); 957 958 other_links = 0; 959 for (odl = bundle->links; odl; odl = odl->next) 960 if (odl != dl && odl->state != DATALINK_CLOSED) 961 other_links++; 962 963 if (!other_links) { 964 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */ 965 bundle_DownInterface(bundle); 966 ncp2initial(&bundle->ncp); 967 mp_Down(&bundle->ncp.mp); 968 bundle_NewPhase(bundle, PHASE_DEAD); 969 #ifndef NORADIUS 970 if (bundle->radius.sessiontime) 971 bundle_StopSessionTimer(bundle); 972 #endif 973 bundle_StopIdleTimer(bundle); 974 } 975 } 976 977 void 978 bundle_Open(struct bundle *bundle, const char *name, int mask, int force) 979 { 980 /* 981 * Please open the given datalink, or all if name == NULL 982 */ 983 struct datalink *dl; 984 985 for (dl = bundle->links; dl; dl = dl->next) 986 if (name == NULL || !strcasecmp(dl->name, name)) { 987 if ((mask & dl->physical->type) && 988 (dl->state == DATALINK_CLOSED || 989 (force && dl->state == DATALINK_OPENING && 990 dl->dial.timer.state == TIMER_RUNNING) || 991 dl->state == DATALINK_READY)) { 992 timer_Stop(&dl->dial.timer); /* We're finished with this */ 993 datalink_Up(dl, 1, 1); 994 if (mask & PHYS_AUTO) 995 break; /* Only one AUTO link at a time */ 996 } 997 if (name != NULL) 998 break; 999 } 1000 } 1001 1002 struct datalink * 1003 bundle2datalink(struct bundle *bundle, const char *name) 1004 { 1005 struct datalink *dl; 1006 1007 if (name != NULL) { 1008 for (dl = bundle->links; dl; dl = dl->next) 1009 if (!strcasecmp(dl->name, name)) 1010 return dl; 1011 } else if (bundle->links && !bundle->links->next) 1012 return bundle->links; 1013 1014 return NULL; 1015 } 1016 1017 int 1018 bundle_ShowLinks(struct cmdargs const *arg) 1019 { 1020 struct datalink *dl; 1021 struct pppThroughput *t; 1022 unsigned long long octets; 1023 int secs; 1024 1025 for (dl = arg->bundle->links; dl; dl = dl->next) { 1026 octets = MAX(dl->physical->link.stats.total.in.OctetsPerSecond, 1027 dl->physical->link.stats.total.out.OctetsPerSecond); 1028 1029 prompt_Printf(arg->prompt, "Name: %s [%s, %s]", 1030 dl->name, mode2Nam(dl->physical->type), datalink_State(dl)); 1031 if (dl->physical->link.stats.total.rolling && dl->state == DATALINK_OPEN) 1032 prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)", 1033 dl->mp.bandwidth ? dl->mp.bandwidth : 1034 physical_GetSpeed(dl->physical), 1035 octets * 8, octets); 1036 prompt_Printf(arg->prompt, "\n"); 1037 } 1038 1039 t = &arg->bundle->ncp.mp.link.stats.total; 1040 octets = MAX(t->in.OctetsPerSecond, t->out.OctetsPerSecond); 1041 secs = t->downtime ? 0 : throughput_uptime(t); 1042 if (secs > t->SamplePeriod) 1043 secs = t->SamplePeriod; 1044 if (secs) 1045 prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)" 1046 " over the last %d secs\n", octets * 8, octets, secs); 1047 1048 return 0; 1049 } 1050 1051 static const char * 1052 optval(struct bundle *bundle, int bit) 1053 { 1054 return (bundle->cfg.opt & bit) ? "enabled" : "disabled"; 1055 } 1056 1057 int 1058 bundle_ShowStatus(struct cmdargs const *arg) 1059 { 1060 int remaining; 1061 1062 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle)); 1063 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name); 1064 prompt_Printf(arg->prompt, " Interface: %s @ %lubps", 1065 arg->bundle->iface->name, arg->bundle->bandwidth); 1066 1067 if (arg->bundle->upat) { 1068 int secs = bundle_Uptime(arg->bundle); 1069 1070 prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600, 1071 (secs / 60) % 60, secs % 60); 1072 } 1073 prompt_Printf(arg->prompt, "\n Queued: %lu of %u\n", 1074 (unsigned long)ncp_QueueLen(&arg->bundle->ncp), 1075 arg->bundle->cfg.ifqueue); 1076 1077 prompt_Printf(arg->prompt, "\nDefaults:\n"); 1078 prompt_Printf(arg->prompt, " Label: %s\n", 1079 arg->bundle->cfg.label); 1080 prompt_Printf(arg->prompt, " Auth name: %s\n", 1081 arg->bundle->cfg.auth.name); 1082 prompt_Printf(arg->prompt, " Diagnostic socket: "); 1083 if (*server.cfg.sockname != '\0') { 1084 prompt_Printf(arg->prompt, "%s", server.cfg.sockname); 1085 if (server.cfg.mask != (mode_t)-1) 1086 prompt_Printf(arg->prompt, ", mask 0%03o", (int)server.cfg.mask); 1087 prompt_Printf(arg->prompt, "%s\n", server.fd == -1 ? " (not open)" : ""); 1088 } else if (server.cfg.port != 0) 1089 prompt_Printf(arg->prompt, "TCP port %d%s\n", server.cfg.port, 1090 server.fd == -1 ? " (not open)" : ""); 1091 else 1092 prompt_Printf(arg->prompt, "none\n"); 1093 1094 prompt_Printf(arg->prompt, " Choked Timer: %us\n", 1095 arg->bundle->cfg.choked.timeout); 1096 1097 #ifndef NORADIUS 1098 radius_Show(&arg->bundle->radius, arg->prompt); 1099 #endif 1100 1101 prompt_Printf(arg->prompt, " Idle Timer: "); 1102 if (arg->bundle->cfg.idle.timeout) { 1103 prompt_Printf(arg->prompt, "%us", arg->bundle->cfg.idle.timeout); 1104 if (arg->bundle->cfg.idle.min_timeout) 1105 prompt_Printf(arg->prompt, ", min %us", 1106 arg->bundle->cfg.idle.min_timeout); 1107 remaining = bundle_RemainingIdleTime(arg->bundle); 1108 if (remaining != -1) 1109 prompt_Printf(arg->prompt, " (%ds remaining)", remaining); 1110 prompt_Printf(arg->prompt, "\n"); 1111 } else 1112 prompt_Printf(arg->prompt, "disabled\n"); 1113 1114 prompt_Printf(arg->prompt, " Filter Decap: %-20.20s", 1115 optval(arg->bundle, OPT_FILTERDECAP)); 1116 prompt_Printf(arg->prompt, " ID check: %s\n", 1117 optval(arg->bundle, OPT_IDCHECK)); 1118 prompt_Printf(arg->prompt, " Iface-Alias: %-20.20s", 1119 optval(arg->bundle, OPT_IFACEALIAS)); 1120 #ifndef NOINET6 1121 prompt_Printf(arg->prompt, " IPCP: %s\n", 1122 optval(arg->bundle, OPT_IPCP)); 1123 prompt_Printf(arg->prompt, " IPV6CP: %-20.20s", 1124 optval(arg->bundle, OPT_IPV6CP)); 1125 #endif 1126 prompt_Printf(arg->prompt, " Keep-Session: %s\n", 1127 optval(arg->bundle, OPT_KEEPSESSION)); 1128 prompt_Printf(arg->prompt, " Loopback: %-20.20s", 1129 optval(arg->bundle, OPT_LOOPBACK)); 1130 prompt_Printf(arg->prompt, " PasswdAuth: %s\n", 1131 optval(arg->bundle, OPT_PASSWDAUTH)); 1132 prompt_Printf(arg->prompt, " Proxy: %-20.20s", 1133 optval(arg->bundle, OPT_PROXY)); 1134 prompt_Printf(arg->prompt, " Proxyall: %s\n", 1135 optval(arg->bundle, OPT_PROXYALL)); 1136 prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s", 1137 optval(arg->bundle, OPT_SROUTES)); 1138 prompt_Printf(arg->prompt, " TCPMSS Fixup: %s\n", 1139 optval(arg->bundle, OPT_TCPMSSFIXUP)); 1140 prompt_Printf(arg->prompt, " Throughput: %-20.20s", 1141 optval(arg->bundle, OPT_THROUGHPUT)); 1142 prompt_Printf(arg->prompt, " Utmp Logging: %s\n", 1143 optval(arg->bundle, OPT_UTMP)); 1144 1145 return 0; 1146 } 1147 1148 static void 1149 bundle_IdleTimeout(void *v) 1150 { 1151 struct bundle *bundle = (struct bundle *)v; 1152 1153 log_Printf(LogPHASE, "Idle timer expired\n"); 1154 bundle_StopIdleTimer(bundle); 1155 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1156 } 1157 1158 /* 1159 * Start Idle timer. If timeout is reached, we call bundle_Close() to 1160 * close LCP and link. 1161 */ 1162 void 1163 bundle_StartIdleTimer(struct bundle *bundle, unsigned secs) 1164 { 1165 timer_Stop(&bundle->idle.timer); 1166 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1167 bundle->phys_type.open && bundle->cfg.idle.timeout) { 1168 time_t now = time(NULL); 1169 1170 if (secs == 0) 1171 secs = bundle->cfg.idle.timeout; 1172 1173 /* We want at least `secs' */ 1174 if (bundle->cfg.idle.min_timeout > secs && bundle->upat) { 1175 unsigned up = now - bundle->upat; 1176 1177 if (bundle->cfg.idle.min_timeout > up && 1178 bundle->cfg.idle.min_timeout - up > (long long)secs) 1179 /* Only increase from the current `remaining' value */ 1180 secs = bundle->cfg.idle.min_timeout - up; 1181 } 1182 bundle->idle.timer.func = bundle_IdleTimeout; 1183 bundle->idle.timer.name = "idle"; 1184 bundle->idle.timer.load = secs * SECTICKS; 1185 bundle->idle.timer.arg = bundle; 1186 timer_Start(&bundle->idle.timer); 1187 bundle->idle.done = now + secs; 1188 } 1189 } 1190 1191 void 1192 bundle_SetIdleTimer(struct bundle *bundle, unsigned timeout, 1193 unsigned min_timeout) 1194 { 1195 bundle->cfg.idle.timeout = timeout; 1196 bundle->cfg.idle.min_timeout = min_timeout; 1197 if (ncp_LayersOpen(&bundle->ncp)) 1198 bundle_StartIdleTimer(bundle, 0); 1199 } 1200 1201 void 1202 bundle_StopIdleTimer(struct bundle *bundle) 1203 { 1204 timer_Stop(&bundle->idle.timer); 1205 bundle->idle.done = 0; 1206 } 1207 1208 static int 1209 bundle_RemainingIdleTime(struct bundle *bundle) 1210 { 1211 if (bundle->idle.done) 1212 return bundle->idle.done - time(NULL); 1213 return -1; 1214 } 1215 1216 #ifndef NORADIUS 1217 1218 static void 1219 bundle_SessionTimeout(void *v) 1220 { 1221 struct bundle *bundle = (struct bundle *)v; 1222 1223 log_Printf(LogPHASE, "Session-Timeout timer expired\n"); 1224 bundle_StopSessionTimer(bundle); 1225 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1226 } 1227 1228 void 1229 bundle_StartSessionTimer(struct bundle *bundle, unsigned secs) 1230 { 1231 timer_Stop(&bundle->session.timer); 1232 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1233 bundle->phys_type.open && bundle->radius.sessiontime) { 1234 time_t now = time(NULL); 1235 1236 if (secs == 0) 1237 secs = bundle->radius.sessiontime; 1238 1239 bundle->session.timer.func = bundle_SessionTimeout; 1240 bundle->session.timer.name = "session"; 1241 bundle->session.timer.load = secs * SECTICKS; 1242 bundle->session.timer.arg = bundle; 1243 timer_Start(&bundle->session.timer); 1244 bundle->session.done = now + secs; 1245 } 1246 } 1247 1248 void 1249 bundle_StopSessionTimer(struct bundle *bundle) 1250 { 1251 timer_Stop(&bundle->session.timer); 1252 bundle->session.done = 0; 1253 } 1254 1255 #endif 1256 1257 int 1258 bundle_IsDead(struct bundle *bundle) 1259 { 1260 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp); 1261 } 1262 1263 static struct datalink * 1264 bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl) 1265 { 1266 struct datalink **dlp; 1267 1268 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next) 1269 if (*dlp == dl) { 1270 *dlp = dl->next; 1271 dl->next = NULL; 1272 bundle_LinksRemoved(bundle); 1273 return dl; 1274 } 1275 1276 return NULL; 1277 } 1278 1279 static void 1280 bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl) 1281 { 1282 struct datalink **dlp = &bundle->links; 1283 1284 while (*dlp) 1285 dlp = &(*dlp)->next; 1286 1287 *dlp = dl; 1288 dl->next = NULL; 1289 1290 bundle_LinkAdded(bundle, dl); 1291 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1292 } 1293 1294 void 1295 bundle_CleanDatalinks(struct bundle *bundle) 1296 { 1297 struct datalink **dlp = &bundle->links; 1298 int found = 0; 1299 1300 while (*dlp) 1301 if ((*dlp)->state == DATALINK_CLOSED && 1302 (*dlp)->physical->type & 1303 (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) { 1304 *dlp = datalink_Destroy(*dlp); 1305 found++; 1306 } else 1307 dlp = &(*dlp)->next; 1308 1309 if (found) 1310 bundle_LinksRemoved(bundle); 1311 } 1312 1313 int 1314 bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl, 1315 const char *name) 1316 { 1317 if (bundle2datalink(bundle, name)) { 1318 log_Printf(LogWARN, "Clone: %s: name already exists\n", name); 1319 return 0; 1320 } 1321 1322 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name)); 1323 return 1; 1324 } 1325 1326 void 1327 bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl) 1328 { 1329 dl = bundle_DatalinkLinkout(bundle, dl); 1330 if (dl) 1331 datalink_Destroy(dl); 1332 } 1333 1334 void 1335 bundle_SetLabel(struct bundle *bundle, const char *label) 1336 { 1337 if (label) 1338 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1); 1339 else 1340 *bundle->cfg.label = '\0'; 1341 } 1342 1343 const char * 1344 bundle_GetLabel(struct bundle *bundle) 1345 { 1346 return *bundle->cfg.label ? bundle->cfg.label : NULL; 1347 } 1348 1349 int 1350 bundle_LinkSize(void) 1351 { 1352 struct iovec iov[SCATTER_SEGMENTS]; 1353 int niov, expect, f; 1354 1355 iov[0].iov_len = strlen(Version) + 1; 1356 iov[0].iov_base = NULL; 1357 niov = 1; 1358 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1359 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1360 return 0; 1361 } 1362 1363 for (f = expect = 0; f < niov; f++) 1364 expect += iov[f].iov_len; 1365 1366 return expect; 1367 } 1368 1369 void 1370 bundle_ReceiveDatalink(struct bundle *bundle, int s) 1371 { 1372 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1373 int niov, expect, f, *fd, nfd, onfd; 1374 ssize_t got; 1375 struct iovec iov[SCATTER_SEGMENTS]; 1376 struct cmsghdr *cmsg; 1377 struct msghdr msg; 1378 struct datalink *dl; 1379 pid_t pid; 1380 1381 log_Printf(LogPHASE, "Receiving datalink\n"); 1382 1383 /* 1384 * Create our scatter/gather array - passing NULL gets the space 1385 * allocation requirement rather than actually flattening the 1386 * structures. 1387 */ 1388 iov[0].iov_len = strlen(Version) + 1; 1389 iov[0].iov_base = NULL; 1390 niov = 1; 1391 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1392 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1393 return; 1394 } 1395 1396 /* Allocate the scatter/gather array for recvmsg() */ 1397 for (f = expect = 0; f < niov; f++) { 1398 if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) { 1399 log_Printf(LogERROR, "Cannot allocate space to receive link\n"); 1400 return; 1401 } 1402 if (f) 1403 expect += iov[f].iov_len; 1404 } 1405 1406 /* Set up our message */ 1407 cmsg = (struct cmsghdr *)cmsgbuf; 1408 cmsg->cmsg_len = sizeof cmsgbuf; 1409 cmsg->cmsg_level = SOL_SOCKET; 1410 cmsg->cmsg_type = 0; 1411 1412 memset(&msg, '\0', sizeof msg); 1413 msg.msg_name = NULL; 1414 msg.msg_namelen = 0; 1415 msg.msg_iov = iov; 1416 msg.msg_iovlen = 1; /* Only send the version at the first pass */ 1417 msg.msg_control = cmsgbuf; 1418 msg.msg_controllen = sizeof cmsgbuf; 1419 1420 log_Printf(LogDEBUG, "Expecting %u scatter/gather bytes\n", 1421 (unsigned)iov[0].iov_len); 1422 1423 if ((got = recvmsg(s, &msg, MSG_WAITALL)) != (ssize_t)iov[0].iov_len) { 1424 if (got == -1) 1425 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); 1426 else 1427 log_Printf(LogERROR, "Failed recvmsg: Got %zu, not %u\n", 1428 got, (unsigned)iov[0].iov_len); 1429 while (niov--) 1430 free(iov[niov].iov_base); 1431 return; 1432 } 1433 1434 if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { 1435 log_Printf(LogERROR, "Recvmsg: no descriptors received !\n"); 1436 while (niov--) 1437 free(iov[niov].iov_base); 1438 return; 1439 } 1440 1441 fd = (int *)CMSG_DATA(cmsg); 1442 nfd = ((caddr_t)cmsg + cmsg->cmsg_len - (caddr_t)fd) / sizeof(int); 1443 1444 if (nfd < 2) { 1445 log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n", 1446 nfd, nfd == 1 ? "" : "s"); 1447 while (nfd--) 1448 close(fd[nfd]); 1449 while (niov--) 1450 free(iov[niov].iov_base); 1451 return; 1452 } 1453 1454 /* 1455 * We've successfully received two or more open file descriptors 1456 * through our socket, plus a version string. Make sure it's the 1457 * correct version, and drop the connection if it's not. 1458 */ 1459 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) { 1460 log_Printf(LogWARN, "Cannot receive datalink, incorrect version" 1461 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len, 1462 (char *)iov[0].iov_base, Version); 1463 while (nfd--) 1464 close(fd[nfd]); 1465 while (niov--) 1466 free(iov[niov].iov_base); 1467 return; 1468 } 1469 1470 /* 1471 * Everything looks good. Send the other side our process id so that 1472 * they can transfer lock ownership, and wait for them to send the 1473 * actual link data. 1474 */ 1475 pid = getpid(); 1476 if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) { 1477 if (got == -1) 1478 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1479 else 1480 log_Printf(LogERROR, "Failed write: Got %zu, not %d\n", got, 1481 (int)(sizeof pid)); 1482 while (nfd--) 1483 close(fd[nfd]); 1484 while (niov--) 1485 free(iov[niov].iov_base); 1486 return; 1487 } 1488 1489 if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) { 1490 if (got == -1) 1491 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1492 else 1493 log_Printf(LogERROR, "Failed write: Got %zu, not %d\n", got, expect); 1494 while (nfd--) 1495 close(fd[nfd]); 1496 while (niov--) 1497 free(iov[niov].iov_base); 1498 return; 1499 } 1500 close(fd[1]); 1501 1502 onfd = nfd; /* We've got this many in our array */ 1503 nfd -= 2; /* Don't include p->fd and our reply descriptor */ 1504 niov = 1; /* Skip the version id */ 1505 dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, fd[0], 1506 fd + 2, &nfd); 1507 if (dl) { 1508 1509 if (nfd) { 1510 log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d " 1511 "auxiliary file descriptors (%d remain)\n", onfd, nfd); 1512 datalink_Destroy(dl); 1513 while (nfd--) 1514 close(fd[onfd--]); 1515 close(fd[0]); 1516 } else { 1517 bundle_DatalinkLinkin(bundle, dl); 1518 datalink_AuthOk(dl); 1519 bundle_CalculateBandwidth(dl->bundle); 1520 } 1521 } else { 1522 while (nfd--) 1523 close(fd[onfd--]); 1524 close(fd[0]); 1525 close(fd[1]); 1526 } 1527 1528 free(iov[0].iov_base); 1529 } 1530 1531 void 1532 bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun) 1533 { 1534 char cmsgbuf[CMSG_SPACE(sizeof(int) * SEND_MAXFD)]; 1535 const char *constlock; 1536 char *lock; 1537 struct cmsghdr *cmsg; 1538 struct msghdr msg; 1539 struct iovec iov[SCATTER_SEGMENTS]; 1540 int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2]; 1541 ssize_t got; 1542 pid_t newpid; 1543 1544 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name); 1545 1546 /* Record the base device name for a lock transfer later */ 1547 constlock = physical_LockedDevice(dl->physical); 1548 if (constlock) { 1549 lock = alloca(strlen(constlock) + 1); 1550 strcpy(lock, constlock); 1551 } else 1552 lock = NULL; 1553 1554 bundle_LinkClosed(dl->bundle, dl); 1555 bundle_DatalinkLinkout(dl->bundle, dl); 1556 1557 /* Build our scatter/gather array */ 1558 iov[0].iov_len = strlen(Version) + 1; 1559 iov[0].iov_base = strdup(Version); 1560 niov = 1; 1561 nfd = 0; 1562 1563 fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd); 1564 1565 if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) { 1566 /* 1567 * fd[1] is used to get the peer process id back, then to confirm that 1568 * we've transferred any device locks to that process id. 1569 */ 1570 fd[1] = reply[1]; 1571 1572 nfd += 2; /* Include fd[0] and fd[1] */ 1573 memset(&msg, '\0', sizeof msg); 1574 1575 msg.msg_name = NULL; 1576 msg.msg_namelen = 0; 1577 /* 1578 * Only send the version to start... We used to send the whole lot, but 1579 * this caused problems with our RECVBUF size as a single link is about 1580 * 22k ! This way, we should bump into no limits. 1581 */ 1582 msg.msg_iovlen = 1; 1583 msg.msg_iov = iov; 1584 msg.msg_control = cmsgbuf; 1585 msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfd); 1586 msg.msg_flags = 0; 1587 1588 cmsg = (struct cmsghdr *)cmsgbuf; 1589 cmsg->cmsg_len = msg.msg_controllen; 1590 cmsg->cmsg_level = SOL_SOCKET; 1591 cmsg->cmsg_type = SCM_RIGHTS; 1592 1593 for (f = 0; f < nfd; f++) 1594 *((int *)CMSG_DATA(cmsg) + f) = fd[f]; 1595 1596 for (f = 1, expect = 0; f < niov; f++) 1597 expect += iov[f].iov_len; 1598 1599 if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1) 1600 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1601 strerror(errno)); 1602 if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1) 1603 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1604 strerror(errno)); 1605 1606 log_Printf(LogDEBUG, "Sending %d descriptor%s and %u bytes in scatter" 1607 "/gather array\n", nfd, nfd == 1 ? "" : "s", 1608 (unsigned)iov[0].iov_len); 1609 1610 if ((got = sendmsg(s, &msg, 0)) == -1) 1611 log_Printf(LogERROR, "Failed sendmsg: %s: %s\n", 1612 sun->sun_path, strerror(errno)); 1613 else if (got != (ssize_t)iov[0].iov_len) 1614 log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %zu of %u\n", 1615 sun->sun_path, got, (unsigned)iov[0].iov_len); 1616 else { 1617 /* We must get the ACK before closing the descriptor ! */ 1618 int res; 1619 1620 if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) { 1621 log_Printf(LogDEBUG, "Received confirmation from pid %ld\n", 1622 (long)newpid); 1623 if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK) 1624 log_Printf(LogERROR, "uu_lock_txfr: %s\n", uu_lockerr(res)); 1625 1626 log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect); 1627 if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) { 1628 if (got == -1) 1629 log_Printf(LogERROR, "%s: Failed writev: %s\n", 1630 sun->sun_path, strerror(errno)); 1631 else 1632 log_Printf(LogERROR, "%s: Failed writev: Wrote %zu of %d\n", 1633 sun->sun_path, got, expect); 1634 } 1635 } else if (got == -1) 1636 log_Printf(LogERROR, "%s: Failed socketpair read: %s\n", 1637 sun->sun_path, strerror(errno)); 1638 else 1639 log_Printf(LogERROR, "%s: Failed socketpair read: Got %zu of %d\n", 1640 sun->sun_path, got, (int)(sizeof newpid)); 1641 } 1642 1643 close(reply[0]); 1644 close(reply[1]); 1645 1646 newsid = Enabled(dl->bundle, OPT_KEEPSESSION) || 1647 tcgetpgrp(fd[0]) == getpgrp(); 1648 while (nfd) 1649 close(fd[--nfd]); 1650 if (newsid) 1651 bundle_setsid(dl->bundle, got != -1); 1652 } 1653 close(s); 1654 1655 while (niov--) 1656 free(iov[niov].iov_base); 1657 } 1658 1659 int 1660 bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl, 1661 const char *name) 1662 { 1663 struct datalink *dl; 1664 1665 if (!strcasecmp(ndl->name, name)) 1666 return 1; 1667 1668 for (dl = bundle->links; dl; dl = dl->next) 1669 if (!strcasecmp(dl->name, name)) 1670 return 0; 1671 1672 datalink_Rename(ndl, name); 1673 return 1; 1674 } 1675 1676 int 1677 bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode) 1678 { 1679 int omode; 1680 1681 omode = dl->physical->type; 1682 if (omode == mode) 1683 return 1; 1684 1685 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO)) 1686 /* First auto link */ 1687 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) { 1688 log_Printf(LogWARN, "You must `set ifaddr' or `open' before" 1689 " changing mode to %s\n", mode2Nam(mode)); 1690 return 0; 1691 } 1692 1693 if (!datalink_SetMode(dl, mode)) 1694 return 0; 1695 1696 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) && 1697 bundle->phase != PHASE_NETWORK) 1698 /* First auto link, we need an interface */ 1699 ipcp_InterfaceUp(&bundle->ncp.ipcp); 1700 1701 /* Regenerate phys_type and adjust idle timer */ 1702 bundle_LinksRemoved(bundle); 1703 1704 return 1; 1705 } 1706 1707 void 1708 bundle_setsid(struct bundle *bundle, int holdsession) 1709 { 1710 /* 1711 * Lose the current session. This means getting rid of our pid 1712 * too so that the tty device will really go away, and any getty 1713 * etc will be allowed to restart. 1714 */ 1715 pid_t pid, orig; 1716 int fds[2]; 1717 char done; 1718 struct datalink *dl; 1719 1720 if (!holdsession && bundle_IsDead(bundle)) { 1721 /* 1722 * No need to lose our session after all... we're going away anyway 1723 * 1724 * We should really stop the timer and pause if holdsession is set and 1725 * the bundle's dead, but that leaves other resources lying about :-( 1726 */ 1727 return; 1728 } 1729 1730 orig = getpid(); 1731 if (pipe(fds) == -1) { 1732 log_Printf(LogERROR, "pipe: %s\n", strerror(errno)); 1733 return; 1734 } 1735 switch ((pid = fork())) { 1736 case -1: 1737 log_Printf(LogERROR, "fork: %s\n", strerror(errno)); 1738 close(fds[0]); 1739 close(fds[1]); 1740 return; 1741 case 0: 1742 close(fds[1]); 1743 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1744 close(fds[0]); 1745 if (pipe(fds) == -1) { 1746 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno)); 1747 return; 1748 } 1749 switch ((pid = fork())) { 1750 case -1: 1751 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno)); 1752 close(fds[0]); 1753 close(fds[1]); 1754 return; 1755 case 0: 1756 close(fds[1]); 1757 bundle_LockTun(bundle); /* update pid */ 1758 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1759 close(fds[0]); 1760 setsid(); 1761 bundle_ChangedPID(bundle); 1762 log_Printf(LogDEBUG, "%ld -> %ld: %s session control\n", 1763 (long)orig, (long)getpid(), 1764 holdsession ? "Passed" : "Dropped"); 1765 timer_InitService(0); /* Start the Timer Service */ 1766 break; 1767 default: 1768 close(fds[0]); 1769 /* Give away all our physical locks (to the final process) */ 1770 for (dl = bundle->links; dl; dl = dl->next) 1771 if (dl->state != DATALINK_CLOSED) 1772 physical_ChangedPid(dl->physical, pid); 1773 write(fds[1], "!", 1); /* done */ 1774 close(fds[1]); 1775 _exit(0); 1776 break; 1777 } 1778 break; 1779 default: 1780 close(fds[0]); 1781 /* Give away all our physical locks (to the intermediate process) */ 1782 for (dl = bundle->links; dl; dl = dl->next) 1783 if (dl->state != DATALINK_CLOSED) 1784 physical_ChangedPid(dl->physical, pid); 1785 write(fds[1], "!", 1); /* done */ 1786 close(fds[1]); 1787 if (holdsession) { 1788 int fd, status; 1789 1790 timer_TermService(); 1791 signal(SIGPIPE, SIG_DFL); 1792 signal(SIGALRM, SIG_DFL); 1793 signal(SIGHUP, SIG_DFL); 1794 signal(SIGTERM, SIG_DFL); 1795 signal(SIGINT, SIG_DFL); 1796 signal(SIGQUIT, SIG_DFL); 1797 for (fd = getdtablesize(); fd >= 0; fd--) 1798 close(fd); 1799 /* 1800 * Reap the intermediate process. As we're not exiting but the 1801 * intermediate is, we don't want it to become defunct. 1802 */ 1803 waitpid(pid, &status, 0); 1804 /* Tweak our process arguments.... */ 1805 SetTitle("session owner"); 1806 #ifndef NOSUID 1807 setuid(ID0realuid()); 1808 #endif 1809 /* 1810 * Hang around for a HUP. This should happen as soon as the 1811 * ppp that we passed our ctty descriptor to closes it. 1812 * NOTE: If this process dies, the passed descriptor becomes 1813 * invalid and will give a select() error by setting one 1814 * of the error fds, aborting the other ppp. We don't 1815 * want that to happen ! 1816 */ 1817 pause(); 1818 } 1819 _exit(0); 1820 break; 1821 } 1822 } 1823 1824 unsigned 1825 bundle_HighestState(struct bundle *bundle) 1826 { 1827 struct datalink *dl; 1828 unsigned result = DATALINK_CLOSED; 1829 1830 for (dl = bundle->links; dl; dl = dl->next) 1831 if (result < dl->state) 1832 result = dl->state; 1833 1834 return result; 1835 } 1836 1837 int 1838 bundle_Exception(struct bundle *bundle, int fd) 1839 { 1840 struct datalink *dl; 1841 1842 for (dl = bundle->links; dl; dl = dl->next) 1843 if (dl->physical->fd == fd) { 1844 datalink_Down(dl, CLOSE_NORMAL); 1845 return 1; 1846 } 1847 1848 return 0; 1849 } 1850 1851 void 1852 bundle_AdjustFilters(struct bundle *bundle, struct ncpaddr *local, 1853 struct ncpaddr *remote) 1854 { 1855 filter_AdjustAddr(&bundle->filter.in, local, remote, NULL); 1856 filter_AdjustAddr(&bundle->filter.out, local, remote, NULL); 1857 filter_AdjustAddr(&bundle->filter.dial, local, remote, NULL); 1858 filter_AdjustAddr(&bundle->filter.alive, local, remote, NULL); 1859 } 1860 1861 void 1862 bundle_AdjustDNS(struct bundle *bundle) 1863 { 1864 struct in_addr *dns = bundle->ncp.ipcp.ns.dns; 1865 1866 filter_AdjustAddr(&bundle->filter.in, NULL, NULL, dns); 1867 filter_AdjustAddr(&bundle->filter.out, NULL, NULL, dns); 1868 filter_AdjustAddr(&bundle->filter.dial, NULL, NULL, dns); 1869 filter_AdjustAddr(&bundle->filter.alive, NULL, NULL, dns); 1870 } 1871 1872 void 1873 bundle_CalculateBandwidth(struct bundle *bundle) 1874 { 1875 struct datalink *dl; 1876 int sp, overhead, maxoverhead; 1877 1878 bundle->bandwidth = 0; 1879 bundle->iface->mtu = 0; 1880 maxoverhead = 0; 1881 1882 for (dl = bundle->links; dl; dl = dl->next) { 1883 overhead = ccp_MTUOverhead(&dl->physical->link.ccp); 1884 if (maxoverhead < overhead) 1885 maxoverhead = overhead; 1886 if (dl->state == DATALINK_OPEN) { 1887 if ((sp = dl->mp.bandwidth) == 0 && 1888 (sp = physical_GetSpeed(dl->physical)) == 0) 1889 log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n", 1890 dl->name, dl->physical->name.full); 1891 else 1892 bundle->bandwidth += sp; 1893 if (!bundle->ncp.mp.active) { 1894 bundle->iface->mtu = dl->physical->link.lcp.his_mru; 1895 break; 1896 } 1897 } 1898 } 1899 1900 if (bundle->bandwidth == 0) 1901 bundle->bandwidth = 115200; /* Shrug */ 1902 1903 if (bundle->ncp.mp.active) { 1904 bundle->iface->mtu = bundle->ncp.mp.peer_mrru; 1905 overhead = ccp_MTUOverhead(&bundle->ncp.mp.link.ccp); 1906 if (maxoverhead < overhead) 1907 maxoverhead = overhead; 1908 } else if (!bundle->iface->mtu) 1909 bundle->iface->mtu = DEF_MRU; 1910 1911 #ifndef NORADIUS 1912 if (bundle->radius.valid && bundle->radius.mtu && 1913 bundle->radius.mtu < bundle->iface->mtu) { 1914 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n", 1915 bundle->radius.mtu); 1916 bundle->iface->mtu = bundle->radius.mtu; 1917 } 1918 #endif 1919 1920 if (maxoverhead) { 1921 log_Printf(LogLCP, "Reducing MTU from %lu to %lu (CCP requirement)\n", 1922 bundle->iface->mtu, bundle->iface->mtu - maxoverhead); 1923 bundle->iface->mtu -= maxoverhead; 1924 } 1925 1926 tun_configure(bundle); 1927 1928 route_UpdateMTU(bundle); 1929 } 1930 1931 void 1932 bundle_AutoAdjust(struct bundle *bundle, int percent, int what) 1933 { 1934 struct datalink *dl, *choice, *otherlinkup; 1935 1936 choice = otherlinkup = NULL; 1937 for (dl = bundle->links; dl; dl = dl->next) 1938 if (dl->physical->type == PHYS_AUTO) { 1939 if (dl->state == DATALINK_OPEN) { 1940 if (what == AUTO_DOWN) { 1941 if (choice) 1942 otherlinkup = choice; 1943 choice = dl; 1944 } 1945 } else if (dl->state == DATALINK_CLOSED) { 1946 if (what == AUTO_UP) { 1947 choice = dl; 1948 break; 1949 } 1950 } else { 1951 /* An auto link in an intermediate state - forget it for the moment */ 1952 choice = NULL; 1953 break; 1954 } 1955 } else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN) 1956 otherlinkup = dl; 1957 1958 if (choice) { 1959 if (what == AUTO_UP) { 1960 log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n", 1961 percent, choice->name); 1962 datalink_Up(choice, 1, 1); 1963 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1964 } else if (otherlinkup) { /* Only bring the second-last link down */ 1965 log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n", 1966 percent, choice->name); 1967 datalink_Close(choice, CLOSE_STAYDOWN); 1968 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1969 } 1970 } 1971 } 1972 1973 int 1974 bundle_WantAutoloadTimer(struct bundle *bundle) 1975 { 1976 struct datalink *dl; 1977 int autolink, opened; 1978 1979 if (bundle->phase == PHASE_NETWORK) { 1980 for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next) 1981 if (dl->physical->type == PHYS_AUTO) { 1982 if (++autolink == 2 || (autolink == 1 && opened)) 1983 /* Two auto links or one auto and one open in NETWORK phase */ 1984 return 1; 1985 } else if (dl->state == DATALINK_OPEN) { 1986 opened++; 1987 if (autolink) 1988 /* One auto and one open link in NETWORK phase */ 1989 return 1; 1990 } 1991 } 1992 1993 return 0; 1994 } 1995 1996 void 1997 bundle_ChangedPID(struct bundle *bundle) 1998 { 1999 #ifdef TUNSIFPID 2000 ioctl(bundle->dev.fd, TUNSIFPID, 0); 2001 #endif 2002 } 2003 2004 int 2005 bundle_Uptime(struct bundle *bundle) 2006 { 2007 if (bundle->upat) 2008 return time(NULL) - bundle->upat; 2009 2010 return 0; 2011 } 2012