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 } else 681 log_Printf(LogERROR, "Warning: Can't create %s: %s\n", 682 pidfilename, strerror(errno)); 683 } 684 685 static void 686 bundle_UnlockTun(struct bundle *bundle) 687 { 688 char pidfilename[PATH_MAX]; 689 690 snprintf(pidfilename, sizeof pidfilename, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 691 ID0unlink(pidfilename); 692 } 693 694 struct bundle * 695 bundle_Create(const char *prefix, int type, int unit) 696 { 697 static struct bundle bundle; /* there can be only one */ 698 int enoentcount, err, minunit, maxunit; 699 const char *ifname; 700 #if defined(__DragonFly__) && !defined(NOKLDLOAD) 701 int kldtried; 702 #endif 703 #if defined(TUNSIFMODE) || defined(TUNSLMODE) || defined(TUNSIFHEAD) 704 int iff; 705 #endif 706 707 if (bundle.iface != NULL) { /* Already allocated ! */ 708 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n"); 709 return NULL; 710 } 711 712 if (unit == -1) { 713 minunit = 0; 714 maxunit = -1; 715 } else { 716 minunit = unit; 717 maxunit = unit + 1; 718 } 719 err = ENOENT; 720 enoentcount = 0; 721 #if defined(__DragonFly__) && !defined(NOKLDLOAD) 722 kldtried = 0; 723 #endif 724 for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) { 725 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d", 726 prefix, bundle.unit); 727 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR); 728 if (bundle.dev.fd >= 0) 729 break; 730 else if (errno == ENXIO || errno == ENOENT) { 731 #if defined(__DragonFly__) && !defined(NOKLDLOAD) 732 if (bundle.unit == minunit && !kldtried++) { 733 /* 734 * Attempt to load the tunnel interface KLD if it isn't loaded 735 * already. 736 */ 737 if (loadmodules(LOAD_VERBOSLY, "if_tun", NULL)) 738 bundle.unit--; 739 continue; 740 } 741 #endif 742 if (errno != ENOENT || ++enoentcount > 2) { 743 err = errno; 744 break; 745 } 746 } else 747 err = errno; 748 } 749 750 if (bundle.dev.fd < 0) { 751 if (unit == -1) 752 log_Printf(LogWARN, "No available tunnel devices found (%s)\n", 753 strerror(err)); 754 else 755 log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err)); 756 return NULL; 757 } 758 759 log_SetTun(bundle.unit); 760 761 ifname = strrchr(bundle.dev.Name, '/'); 762 if (ifname == NULL) 763 ifname = bundle.dev.Name; 764 else 765 ifname++; 766 767 bundle.iface = iface_Create(ifname); 768 if (bundle.iface == NULL) { 769 close(bundle.dev.fd); 770 return NULL; 771 } 772 773 #ifdef TUNSIFMODE 774 /* Make sure we're POINTOPOINT & IFF_MULTICAST */ 775 iff = IFF_POINTOPOINT | IFF_MULTICAST; 776 if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0) 777 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n", 778 strerror(errno)); 779 #endif 780 781 #ifdef TUNSLMODE 782 /* Make sure we're not prepending sockaddrs */ 783 iff = 0; 784 if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0) 785 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n", 786 strerror(errno)); 787 #endif 788 789 #ifdef TUNSIFHEAD 790 /* We want the address family please ! */ 791 iff = 1; 792 if (ID0ioctl(bundle.dev.fd, TUNSIFHEAD, &iff) < 0) { 793 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFHEAD): %s\n", 794 strerror(errno)); 795 bundle.dev.header = 0; 796 } else 797 bundle.dev.header = 1; 798 #else 799 #ifdef __OpenBSD__ 800 /* Always present for OpenBSD */ 801 bundle.dev.header = 1; 802 #else 803 /* 804 * If TUNSIFHEAD isn't available and we're not OpenBSD, assume 805 * everything's AF_INET (hopefully the tun device won't pass us 806 * anything else !). 807 */ 808 bundle.dev.header = 0; 809 #endif 810 #endif 811 812 log_Printf(LogPHASE, "Using interface: %s\n", ifname); 813 814 bundle.bandwidth = 0; 815 bundle.routing_seq = 0; 816 bundle.phase = PHASE_DEAD; 817 bundle.CleaningUp = 0; 818 bundle.NatEnabled = 0; 819 820 bundle.fsm.LayerStart = bundle_LayerStart; 821 bundle.fsm.LayerUp = bundle_LayerUp; 822 bundle.fsm.LayerDown = bundle_LayerDown; 823 bundle.fsm.LayerFinish = bundle_LayerFinish; 824 bundle.fsm.object = &bundle; 825 826 bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT; 827 bundle.cfg.idle.min_timeout = 0; 828 *bundle.cfg.auth.name = '\0'; 829 *bundle.cfg.auth.key = '\0'; 830 bundle.cfg.opt = OPT_IDCHECK | OPT_LOOPBACK | OPT_SROUTES | OPT_TCPMSSFIXUP | 831 OPT_THROUGHPUT | OPT_UTMP; 832 #ifndef NOINET6 833 bundle.cfg.opt |= OPT_IPCP; 834 if (probe.ipv6_available) 835 bundle.cfg.opt |= OPT_IPV6CP; 836 #endif 837 *bundle.cfg.label = '\0'; 838 bundle.cfg.ifqueue = DEF_IFQUEUE; 839 bundle.cfg.choked.timeout = CHOKED_TIMEOUT; 840 bundle.phys_type.all = type; 841 bundle.phys_type.open = 0; 842 bundle.upat = 0; 843 844 bundle.links = datalink_Create("deflink", &bundle, type); 845 if (bundle.links == NULL) { 846 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno)); 847 iface_Destroy(bundle.iface); 848 bundle.iface = NULL; 849 close(bundle.dev.fd); 850 return NULL; 851 } 852 853 bundle.desc.type = BUNDLE_DESCRIPTOR; 854 bundle.desc.UpdateSet = bundle_UpdateSet; 855 bundle.desc.IsSet = bundle_IsSet; 856 bundle.desc.Read = bundle_DescriptorRead; 857 bundle.desc.Write = bundle_DescriptorWrite; 858 859 ncp_Init(&bundle.ncp, &bundle); 860 861 memset(&bundle.filter, '\0', sizeof bundle.filter); 862 bundle.filter.in.fragok = bundle.filter.in.logok = 1; 863 bundle.filter.in.name = "IN"; 864 bundle.filter.out.fragok = bundle.filter.out.logok = 1; 865 bundle.filter.out.name = "OUT"; 866 bundle.filter.dial.name = "DIAL"; 867 bundle.filter.dial.logok = 1; 868 bundle.filter.alive.name = "ALIVE"; 869 bundle.filter.alive.logok = 1; 870 { 871 int i; 872 for (i = 0; i < MAXFILTERS; i++) { 873 bundle.filter.in.rule[i].f_action = A_NONE; 874 bundle.filter.out.rule[i].f_action = A_NONE; 875 bundle.filter.dial.rule[i].f_action = A_NONE; 876 bundle.filter.alive.rule[i].f_action = A_NONE; 877 } 878 } 879 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer); 880 bundle.idle.done = 0; 881 bundle.notify.fd = -1; 882 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer); 883 #ifndef NORADIUS 884 radius_Init(&bundle.radius); 885 #endif 886 887 /* Clean out any leftover crud */ 888 iface_Clear(bundle.iface, &bundle.ncp, 0, IFACE_CLEAR_ALL); 889 890 bundle_LockTun(&bundle); 891 892 return &bundle; 893 } 894 895 static void 896 bundle_DownInterface(struct bundle *bundle) 897 { 898 route_IfDelete(bundle, 1); 899 iface_ClearFlags(bundle->iface->name, IFF_UP); 900 } 901 902 void 903 bundle_Destroy(struct bundle *bundle) 904 { 905 struct datalink *dl; 906 907 /* 908 * Clean up the interface. We don't really need to do the timer_Stop()s, 909 * mp_Down(), iface_Clear() and bundle_DownInterface() unless we're getting 910 * out under exceptional conditions such as a descriptor exception. 911 */ 912 timer_Stop(&bundle->idle.timer); 913 timer_Stop(&bundle->choked.timer); 914 mp_Down(&bundle->ncp.mp); 915 iface_Clear(bundle->iface, &bundle->ncp, 0, IFACE_CLEAR_ALL); 916 bundle_DownInterface(bundle); 917 918 #ifndef NORADIUS 919 /* Tell the radius server the bad news */ 920 radius_Destroy(&bundle->radius); 921 #endif 922 923 /* Again, these are all DATALINK_CLOSED unless we're abending */ 924 dl = bundle->links; 925 while (dl) 926 dl = datalink_Destroy(dl); 927 928 ncp_Destroy(&bundle->ncp); 929 930 close(bundle->dev.fd); 931 bundle_UnlockTun(bundle); 932 933 /* In case we never made PHASE_NETWORK */ 934 bundle_Notify(bundle, EX_ERRDEAD); 935 936 iface_Destroy(bundle->iface); 937 bundle->iface = NULL; 938 } 939 940 void 941 bundle_LinkClosed(struct bundle *bundle, struct datalink *dl) 942 { 943 /* 944 * Our datalink has closed. 945 * CleanDatalinks() (called from DoLoop()) will remove closed 946 * BACKGROUND, FOREGROUND and DIRECT links. 947 * If it's the last data link, enter phase DEAD. 948 * 949 * NOTE: dl may not be in our list (bundle_SendDatalink()) ! 950 */ 951 952 struct datalink *odl; 953 int other_links; 954 955 log_SetTtyCommandMode(dl); 956 957 other_links = 0; 958 for (odl = bundle->links; odl; odl = odl->next) 959 if (odl != dl && odl->state != DATALINK_CLOSED) 960 other_links++; 961 962 if (!other_links) { 963 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */ 964 bundle_DownInterface(bundle); 965 ncp2initial(&bundle->ncp); 966 mp_Down(&bundle->ncp.mp); 967 bundle_NewPhase(bundle, PHASE_DEAD); 968 #ifndef NORADIUS 969 if (bundle->radius.sessiontime) 970 bundle_StopSessionTimer(bundle); 971 #endif 972 bundle_StopIdleTimer(bundle); 973 } 974 } 975 976 void 977 bundle_Open(struct bundle *bundle, const char *name, int mask, int force) 978 { 979 /* 980 * Please open the given datalink, or all if name == NULL 981 */ 982 struct datalink *dl; 983 984 for (dl = bundle->links; dl; dl = dl->next) 985 if (name == NULL || !strcasecmp(dl->name, name)) { 986 if ((mask & dl->physical->type) && 987 (dl->state == DATALINK_CLOSED || 988 (force && dl->state == DATALINK_OPENING && 989 dl->dial.timer.state == TIMER_RUNNING) || 990 dl->state == DATALINK_READY)) { 991 timer_Stop(&dl->dial.timer); /* We're finished with this */ 992 datalink_Up(dl, 1, 1); 993 if (mask & PHYS_AUTO) 994 break; /* Only one AUTO link at a time */ 995 } 996 if (name != NULL) 997 break; 998 } 999 } 1000 1001 struct datalink * 1002 bundle2datalink(struct bundle *bundle, const char *name) 1003 { 1004 struct datalink *dl; 1005 1006 if (name != NULL) { 1007 for (dl = bundle->links; dl; dl = dl->next) 1008 if (!strcasecmp(dl->name, name)) 1009 return dl; 1010 } else if (bundle->links && !bundle->links->next) 1011 return bundle->links; 1012 1013 return NULL; 1014 } 1015 1016 int 1017 bundle_ShowLinks(struct cmdargs const *arg) 1018 { 1019 struct datalink *dl; 1020 struct pppThroughput *t; 1021 unsigned long long octets; 1022 int secs; 1023 1024 for (dl = arg->bundle->links; dl; dl = dl->next) { 1025 octets = MAX(dl->physical->link.stats.total.in.OctetsPerSecond, 1026 dl->physical->link.stats.total.out.OctetsPerSecond); 1027 1028 prompt_Printf(arg->prompt, "Name: %s [%s, %s]", 1029 dl->name, mode2Nam(dl->physical->type), datalink_State(dl)); 1030 if (dl->physical->link.stats.total.rolling && dl->state == DATALINK_OPEN) 1031 prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)", 1032 dl->mp.bandwidth ? dl->mp.bandwidth : 1033 physical_GetSpeed(dl->physical), 1034 octets * 8, octets); 1035 prompt_Printf(arg->prompt, "\n"); 1036 } 1037 1038 t = &arg->bundle->ncp.mp.link.stats.total; 1039 octets = MAX(t->in.OctetsPerSecond, t->out.OctetsPerSecond); 1040 secs = t->downtime ? 0 : throughput_uptime(t); 1041 if (secs > t->SamplePeriod) 1042 secs = t->SamplePeriod; 1043 if (secs) 1044 prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)" 1045 " over the last %d secs\n", octets * 8, octets, secs); 1046 1047 return 0; 1048 } 1049 1050 static const char * 1051 optval(struct bundle *bundle, int bit) 1052 { 1053 return (bundle->cfg.opt & bit) ? "enabled" : "disabled"; 1054 } 1055 1056 int 1057 bundle_ShowStatus(struct cmdargs const *arg) 1058 { 1059 int remaining; 1060 1061 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle)); 1062 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name); 1063 prompt_Printf(arg->prompt, " Interface: %s @ %lubps", 1064 arg->bundle->iface->name, arg->bundle->bandwidth); 1065 1066 if (arg->bundle->upat) { 1067 int secs = bundle_Uptime(arg->bundle); 1068 1069 prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600, 1070 (secs / 60) % 60, secs % 60); 1071 } 1072 prompt_Printf(arg->prompt, "\n Queued: %lu of %u\n", 1073 (unsigned long)ncp_QueueLen(&arg->bundle->ncp), 1074 arg->bundle->cfg.ifqueue); 1075 1076 prompt_Printf(arg->prompt, "\nDefaults:\n"); 1077 prompt_Printf(arg->prompt, " Label: %s\n", 1078 arg->bundle->cfg.label); 1079 prompt_Printf(arg->prompt, " Auth name: %s\n", 1080 arg->bundle->cfg.auth.name); 1081 prompt_Printf(arg->prompt, " Diagnostic socket: "); 1082 if (*server.cfg.sockname != '\0') { 1083 prompt_Printf(arg->prompt, "%s", server.cfg.sockname); 1084 if (server.cfg.mask != (mode_t)-1) 1085 prompt_Printf(arg->prompt, ", mask 0%03o", (int)server.cfg.mask); 1086 prompt_Printf(arg->prompt, "%s\n", server.fd == -1 ? " (not open)" : ""); 1087 } else if (server.cfg.port != 0) 1088 prompt_Printf(arg->prompt, "TCP port %d%s\n", server.cfg.port, 1089 server.fd == -1 ? " (not open)" : ""); 1090 else 1091 prompt_Printf(arg->prompt, "none\n"); 1092 1093 prompt_Printf(arg->prompt, " Choked Timer: %us\n", 1094 arg->bundle->cfg.choked.timeout); 1095 1096 #ifndef NORADIUS 1097 radius_Show(&arg->bundle->radius, arg->prompt); 1098 #endif 1099 1100 prompt_Printf(arg->prompt, " Idle Timer: "); 1101 if (arg->bundle->cfg.idle.timeout) { 1102 prompt_Printf(arg->prompt, "%us", arg->bundle->cfg.idle.timeout); 1103 if (arg->bundle->cfg.idle.min_timeout) 1104 prompt_Printf(arg->prompt, ", min %us", 1105 arg->bundle->cfg.idle.min_timeout); 1106 remaining = bundle_RemainingIdleTime(arg->bundle); 1107 if (remaining != -1) 1108 prompt_Printf(arg->prompt, " (%ds remaining)", remaining); 1109 prompt_Printf(arg->prompt, "\n"); 1110 } else 1111 prompt_Printf(arg->prompt, "disabled\n"); 1112 1113 prompt_Printf(arg->prompt, " Filter Decap: %-20.20s", 1114 optval(arg->bundle, OPT_FILTERDECAP)); 1115 prompt_Printf(arg->prompt, " ID check: %s\n", 1116 optval(arg->bundle, OPT_IDCHECK)); 1117 prompt_Printf(arg->prompt, " Iface-Alias: %-20.20s", 1118 optval(arg->bundle, OPT_IFACEALIAS)); 1119 #ifndef NOINET6 1120 prompt_Printf(arg->prompt, " IPCP: %s\n", 1121 optval(arg->bundle, OPT_IPCP)); 1122 prompt_Printf(arg->prompt, " IPV6CP: %-20.20s", 1123 optval(arg->bundle, OPT_IPV6CP)); 1124 #endif 1125 prompt_Printf(arg->prompt, " Keep-Session: %s\n", 1126 optval(arg->bundle, OPT_KEEPSESSION)); 1127 prompt_Printf(arg->prompt, " Loopback: %-20.20s", 1128 optval(arg->bundle, OPT_LOOPBACK)); 1129 prompt_Printf(arg->prompt, " PasswdAuth: %s\n", 1130 optval(arg->bundle, OPT_PASSWDAUTH)); 1131 prompt_Printf(arg->prompt, " Proxy: %-20.20s", 1132 optval(arg->bundle, OPT_PROXY)); 1133 prompt_Printf(arg->prompt, " Proxyall: %s\n", 1134 optval(arg->bundle, OPT_PROXYALL)); 1135 prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s", 1136 optval(arg->bundle, OPT_SROUTES)); 1137 prompt_Printf(arg->prompt, " TCPMSS Fixup: %s\n", 1138 optval(arg->bundle, OPT_TCPMSSFIXUP)); 1139 prompt_Printf(arg->prompt, " Throughput: %-20.20s", 1140 optval(arg->bundle, OPT_THROUGHPUT)); 1141 prompt_Printf(arg->prompt, " Utmp Logging: %s\n", 1142 optval(arg->bundle, OPT_UTMP)); 1143 1144 return 0; 1145 } 1146 1147 static void 1148 bundle_IdleTimeout(void *v) 1149 { 1150 struct bundle *bundle = (struct bundle *)v; 1151 1152 log_Printf(LogPHASE, "Idle timer expired\n"); 1153 bundle_StopIdleTimer(bundle); 1154 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1155 } 1156 1157 /* 1158 * Start Idle timer. If timeout is reached, we call bundle_Close() to 1159 * close LCP and link. 1160 */ 1161 void 1162 bundle_StartIdleTimer(struct bundle *bundle, unsigned secs) 1163 { 1164 timer_Stop(&bundle->idle.timer); 1165 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1166 bundle->phys_type.open && bundle->cfg.idle.timeout) { 1167 time_t now = time(NULL); 1168 1169 if (secs == 0) 1170 secs = bundle->cfg.idle.timeout; 1171 1172 /* We want at least `secs' */ 1173 if (bundle->cfg.idle.min_timeout > secs && bundle->upat) { 1174 unsigned up = now - bundle->upat; 1175 1176 if (bundle->cfg.idle.min_timeout > up && 1177 bundle->cfg.idle.min_timeout - up > (long long)secs) 1178 /* Only increase from the current `remaining' value */ 1179 secs = bundle->cfg.idle.min_timeout - up; 1180 } 1181 bundle->idle.timer.func = bundle_IdleTimeout; 1182 bundle->idle.timer.name = "idle"; 1183 bundle->idle.timer.load = secs * SECTICKS; 1184 bundle->idle.timer.arg = bundle; 1185 timer_Start(&bundle->idle.timer); 1186 bundle->idle.done = now + secs; 1187 } 1188 } 1189 1190 void 1191 bundle_SetIdleTimer(struct bundle *bundle, unsigned timeout, 1192 unsigned min_timeout) 1193 { 1194 bundle->cfg.idle.timeout = timeout; 1195 bundle->cfg.idle.min_timeout = min_timeout; 1196 if (ncp_LayersOpen(&bundle->ncp)) 1197 bundle_StartIdleTimer(bundle, 0); 1198 } 1199 1200 void 1201 bundle_StopIdleTimer(struct bundle *bundle) 1202 { 1203 timer_Stop(&bundle->idle.timer); 1204 bundle->idle.done = 0; 1205 } 1206 1207 static int 1208 bundle_RemainingIdleTime(struct bundle *bundle) 1209 { 1210 if (bundle->idle.done) 1211 return bundle->idle.done - time(NULL); 1212 return -1; 1213 } 1214 1215 #ifndef NORADIUS 1216 1217 static void 1218 bundle_SessionTimeout(void *v) 1219 { 1220 struct bundle *bundle = (struct bundle *)v; 1221 1222 log_Printf(LogPHASE, "Session-Timeout timer expired\n"); 1223 bundle_StopSessionTimer(bundle); 1224 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1225 } 1226 1227 void 1228 bundle_StartSessionTimer(struct bundle *bundle, unsigned secs) 1229 { 1230 timer_Stop(&bundle->session.timer); 1231 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1232 bundle->phys_type.open && bundle->radius.sessiontime) { 1233 time_t now = time(NULL); 1234 1235 if (secs == 0) 1236 secs = bundle->radius.sessiontime; 1237 1238 bundle->session.timer.func = bundle_SessionTimeout; 1239 bundle->session.timer.name = "session"; 1240 bundle->session.timer.load = secs * SECTICKS; 1241 bundle->session.timer.arg = bundle; 1242 timer_Start(&bundle->session.timer); 1243 bundle->session.done = now + secs; 1244 } 1245 } 1246 1247 void 1248 bundle_StopSessionTimer(struct bundle *bundle) 1249 { 1250 timer_Stop(&bundle->session.timer); 1251 bundle->session.done = 0; 1252 } 1253 1254 #endif 1255 1256 int 1257 bundle_IsDead(struct bundle *bundle) 1258 { 1259 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp); 1260 } 1261 1262 static struct datalink * 1263 bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl) 1264 { 1265 struct datalink **dlp; 1266 1267 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next) 1268 if (*dlp == dl) { 1269 *dlp = dl->next; 1270 dl->next = NULL; 1271 bundle_LinksRemoved(bundle); 1272 return dl; 1273 } 1274 1275 return NULL; 1276 } 1277 1278 static void 1279 bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl) 1280 { 1281 struct datalink **dlp = &bundle->links; 1282 1283 while (*dlp) 1284 dlp = &(*dlp)->next; 1285 1286 *dlp = dl; 1287 dl->next = NULL; 1288 1289 bundle_LinkAdded(bundle, dl); 1290 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1291 } 1292 1293 void 1294 bundle_CleanDatalinks(struct bundle *bundle) 1295 { 1296 struct datalink **dlp = &bundle->links; 1297 int found = 0; 1298 1299 while (*dlp) 1300 if ((*dlp)->state == DATALINK_CLOSED && 1301 (*dlp)->physical->type & 1302 (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) { 1303 *dlp = datalink_Destroy(*dlp); 1304 found++; 1305 } else 1306 dlp = &(*dlp)->next; 1307 1308 if (found) 1309 bundle_LinksRemoved(bundle); 1310 } 1311 1312 int 1313 bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl, 1314 const char *name) 1315 { 1316 if (bundle2datalink(bundle, name)) { 1317 log_Printf(LogWARN, "Clone: %s: name already exists\n", name); 1318 return 0; 1319 } 1320 1321 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name)); 1322 return 1; 1323 } 1324 1325 void 1326 bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl) 1327 { 1328 dl = bundle_DatalinkLinkout(bundle, dl); 1329 if (dl) 1330 datalink_Destroy(dl); 1331 } 1332 1333 void 1334 bundle_SetLabel(struct bundle *bundle, const char *label) 1335 { 1336 if (label) 1337 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1); 1338 else 1339 *bundle->cfg.label = '\0'; 1340 } 1341 1342 const char * 1343 bundle_GetLabel(struct bundle *bundle) 1344 { 1345 return *bundle->cfg.label ? bundle->cfg.label : NULL; 1346 } 1347 1348 int 1349 bundle_LinkSize(void) 1350 { 1351 struct iovec iov[SCATTER_SEGMENTS]; 1352 int niov, expect, f; 1353 1354 iov[0].iov_len = strlen(Version) + 1; 1355 iov[0].iov_base = NULL; 1356 niov = 1; 1357 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1358 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1359 return 0; 1360 } 1361 1362 for (f = expect = 0; f < niov; f++) 1363 expect += iov[f].iov_len; 1364 1365 return expect; 1366 } 1367 1368 void 1369 bundle_ReceiveDatalink(struct bundle *bundle, int s) 1370 { 1371 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1372 int niov, expect, f, *fd, nfd, onfd; 1373 ssize_t got; 1374 struct iovec iov[SCATTER_SEGMENTS]; 1375 struct cmsghdr *cmsg; 1376 struct msghdr msg; 1377 struct datalink *dl; 1378 pid_t pid; 1379 1380 log_Printf(LogPHASE, "Receiving datalink\n"); 1381 1382 /* 1383 * Create our scatter/gather array - passing NULL gets the space 1384 * allocation requirement rather than actually flattening the 1385 * structures. 1386 */ 1387 iov[0].iov_len = strlen(Version) + 1; 1388 iov[0].iov_base = NULL; 1389 niov = 1; 1390 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1391 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1392 return; 1393 } 1394 1395 /* Allocate the scatter/gather array for recvmsg() */ 1396 for (f = expect = 0; f < niov; f++) { 1397 if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) { 1398 log_Printf(LogERROR, "Cannot allocate space to receive link\n"); 1399 return; 1400 } 1401 if (f) 1402 expect += iov[f].iov_len; 1403 } 1404 1405 /* Set up our message */ 1406 cmsg = (struct cmsghdr *)cmsgbuf; 1407 cmsg->cmsg_len = sizeof cmsgbuf; 1408 cmsg->cmsg_level = SOL_SOCKET; 1409 cmsg->cmsg_type = 0; 1410 1411 memset(&msg, '\0', sizeof msg); 1412 msg.msg_name = NULL; 1413 msg.msg_namelen = 0; 1414 msg.msg_iov = iov; 1415 msg.msg_iovlen = 1; /* Only send the version at the first pass */ 1416 msg.msg_control = cmsgbuf; 1417 msg.msg_controllen = sizeof cmsgbuf; 1418 1419 log_Printf(LogDEBUG, "Expecting %u scatter/gather bytes\n", 1420 (unsigned)iov[0].iov_len); 1421 1422 if ((got = recvmsg(s, &msg, MSG_WAITALL)) != (ssize_t)iov[0].iov_len) { 1423 if (got == -1) 1424 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); 1425 else 1426 log_Printf(LogERROR, "Failed recvmsg: Got %zu, not %u\n", 1427 got, (unsigned)iov[0].iov_len); 1428 while (niov--) 1429 free(iov[niov].iov_base); 1430 return; 1431 } 1432 1433 if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { 1434 log_Printf(LogERROR, "Recvmsg: no descriptors received !\n"); 1435 while (niov--) 1436 free(iov[niov].iov_base); 1437 return; 1438 } 1439 1440 fd = (int *)CMSG_DATA(cmsg); 1441 nfd = ((caddr_t)cmsg + cmsg->cmsg_len - (caddr_t)fd) / sizeof(int); 1442 1443 if (nfd < 2) { 1444 log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n", 1445 nfd, nfd == 1 ? "" : "s"); 1446 while (nfd--) 1447 close(fd[nfd]); 1448 while (niov--) 1449 free(iov[niov].iov_base); 1450 return; 1451 } 1452 1453 /* 1454 * We've successfully received two or more open file descriptors 1455 * through our socket, plus a version string. Make sure it's the 1456 * correct version, and drop the connection if it's not. 1457 */ 1458 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) { 1459 log_Printf(LogWARN, "Cannot receive datalink, incorrect version" 1460 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len, 1461 (char *)iov[0].iov_base, Version); 1462 while (nfd--) 1463 close(fd[nfd]); 1464 while (niov--) 1465 free(iov[niov].iov_base); 1466 return; 1467 } 1468 1469 /* 1470 * Everything looks good. Send the other side our process id so that 1471 * they can transfer lock ownership, and wait for them to send the 1472 * actual link data. 1473 */ 1474 pid = getpid(); 1475 if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) { 1476 if (got == -1) 1477 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1478 else 1479 log_Printf(LogERROR, "Failed write: Got %zu, not %d\n", got, 1480 (int)(sizeof pid)); 1481 while (nfd--) 1482 close(fd[nfd]); 1483 while (niov--) 1484 free(iov[niov].iov_base); 1485 return; 1486 } 1487 1488 if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) { 1489 if (got == -1) 1490 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1491 else 1492 log_Printf(LogERROR, "Failed write: Got %zu, not %d\n", got, expect); 1493 while (nfd--) 1494 close(fd[nfd]); 1495 while (niov--) 1496 free(iov[niov].iov_base); 1497 return; 1498 } 1499 close(fd[1]); 1500 1501 onfd = nfd; /* We've got this many in our array */ 1502 nfd -= 2; /* Don't include p->fd and our reply descriptor */ 1503 niov = 1; /* Skip the version id */ 1504 dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, fd[0], 1505 fd + 2, &nfd); 1506 if (dl) { 1507 1508 if (nfd) { 1509 log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d " 1510 "auxiliary file descriptors (%d remain)\n", onfd, nfd); 1511 datalink_Destroy(dl); 1512 while (nfd--) 1513 close(fd[onfd--]); 1514 close(fd[0]); 1515 } else { 1516 bundle_DatalinkLinkin(bundle, dl); 1517 datalink_AuthOk(dl); 1518 bundle_CalculateBandwidth(dl->bundle); 1519 } 1520 } else { 1521 while (nfd--) 1522 close(fd[onfd--]); 1523 close(fd[0]); 1524 close(fd[1]); 1525 } 1526 1527 free(iov[0].iov_base); 1528 } 1529 1530 void 1531 bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun) 1532 { 1533 char cmsgbuf[CMSG_SPACE(sizeof(int) * SEND_MAXFD)]; 1534 const char *constlock; 1535 char *lock; 1536 struct cmsghdr *cmsg; 1537 struct msghdr msg; 1538 struct iovec iov[SCATTER_SEGMENTS]; 1539 int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2]; 1540 ssize_t got; 1541 pid_t newpid; 1542 1543 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name); 1544 1545 /* Record the base device name for a lock transfer later */ 1546 constlock = physical_LockedDevice(dl->physical); 1547 if (constlock) { 1548 lock = alloca(strlen(constlock) + 1); 1549 strcpy(lock, constlock); 1550 } else 1551 lock = NULL; 1552 1553 bundle_LinkClosed(dl->bundle, dl); 1554 bundle_DatalinkLinkout(dl->bundle, dl); 1555 1556 /* Build our scatter/gather array */ 1557 iov[0].iov_len = strlen(Version) + 1; 1558 iov[0].iov_base = strdup(Version); 1559 niov = 1; 1560 nfd = 0; 1561 1562 fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd); 1563 1564 if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) { 1565 /* 1566 * fd[1] is used to get the peer process id back, then to confirm that 1567 * we've transferred any device locks to that process id. 1568 */ 1569 fd[1] = reply[1]; 1570 1571 nfd += 2; /* Include fd[0] and fd[1] */ 1572 memset(&msg, '\0', sizeof msg); 1573 1574 msg.msg_name = NULL; 1575 msg.msg_namelen = 0; 1576 /* 1577 * Only send the version to start... We used to send the whole lot, but 1578 * this caused problems with our RECVBUF size as a single link is about 1579 * 22k ! This way, we should bump into no limits. 1580 */ 1581 msg.msg_iovlen = 1; 1582 msg.msg_iov = iov; 1583 msg.msg_control = cmsgbuf; 1584 msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfd); 1585 msg.msg_flags = 0; 1586 1587 cmsg = (struct cmsghdr *)cmsgbuf; 1588 cmsg->cmsg_len = msg.msg_controllen; 1589 cmsg->cmsg_level = SOL_SOCKET; 1590 cmsg->cmsg_type = SCM_RIGHTS; 1591 1592 for (f = 0; f < nfd; f++) 1593 *((int *)CMSG_DATA(cmsg) + f) = fd[f]; 1594 1595 for (f = 1, expect = 0; f < niov; f++) 1596 expect += iov[f].iov_len; 1597 1598 if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1) 1599 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1600 strerror(errno)); 1601 if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1) 1602 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1603 strerror(errno)); 1604 1605 log_Printf(LogDEBUG, "Sending %d descriptor%s and %u bytes in scatter" 1606 "/gather array\n", nfd, nfd == 1 ? "" : "s", 1607 (unsigned)iov[0].iov_len); 1608 1609 if ((got = sendmsg(s, &msg, 0)) == -1) 1610 log_Printf(LogERROR, "Failed sendmsg: %s: %s\n", 1611 sun->sun_path, strerror(errno)); 1612 else if (got != (ssize_t)iov[0].iov_len) 1613 log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %zu of %u\n", 1614 sun->sun_path, got, (unsigned)iov[0].iov_len); 1615 else { 1616 /* We must get the ACK before closing the descriptor ! */ 1617 int res; 1618 1619 if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) { 1620 log_Printf(LogDEBUG, "Received confirmation from pid %ld\n", 1621 (long)newpid); 1622 if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK) 1623 log_Printf(LogERROR, "uu_lock_txfr: %s\n", uu_lockerr(res)); 1624 1625 log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect); 1626 if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) { 1627 if (got == -1) 1628 log_Printf(LogERROR, "%s: Failed writev: %s\n", 1629 sun->sun_path, strerror(errno)); 1630 else 1631 log_Printf(LogERROR, "%s: Failed writev: Wrote %zu of %d\n", 1632 sun->sun_path, got, expect); 1633 } 1634 } else if (got == -1) 1635 log_Printf(LogERROR, "%s: Failed socketpair read: %s\n", 1636 sun->sun_path, strerror(errno)); 1637 else 1638 log_Printf(LogERROR, "%s: Failed socketpair read: Got %zu of %d\n", 1639 sun->sun_path, got, (int)(sizeof newpid)); 1640 } 1641 1642 close(reply[0]); 1643 close(reply[1]); 1644 1645 newsid = Enabled(dl->bundle, OPT_KEEPSESSION) || 1646 tcgetpgrp(fd[0]) == getpgrp(); 1647 while (nfd) 1648 close(fd[--nfd]); 1649 if (newsid) 1650 bundle_setsid(dl->bundle, got != -1); 1651 } 1652 close(s); 1653 1654 while (niov--) 1655 free(iov[niov].iov_base); 1656 } 1657 1658 int 1659 bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl, 1660 const char *name) 1661 { 1662 struct datalink *dl; 1663 1664 if (!strcasecmp(ndl->name, name)) 1665 return 1; 1666 1667 for (dl = bundle->links; dl; dl = dl->next) 1668 if (!strcasecmp(dl->name, name)) 1669 return 0; 1670 1671 datalink_Rename(ndl, name); 1672 return 1; 1673 } 1674 1675 int 1676 bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode) 1677 { 1678 int omode; 1679 1680 omode = dl->physical->type; 1681 if (omode == mode) 1682 return 1; 1683 1684 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO)) 1685 /* First auto link */ 1686 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) { 1687 log_Printf(LogWARN, "You must `set ifaddr' or `open' before" 1688 " changing mode to %s\n", mode2Nam(mode)); 1689 return 0; 1690 } 1691 1692 if (!datalink_SetMode(dl, mode)) 1693 return 0; 1694 1695 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) && 1696 bundle->phase != PHASE_NETWORK) 1697 /* First auto link, we need an interface */ 1698 ipcp_InterfaceUp(&bundle->ncp.ipcp); 1699 1700 /* Regenerate phys_type and adjust idle timer */ 1701 bundle_LinksRemoved(bundle); 1702 1703 return 1; 1704 } 1705 1706 void 1707 bundle_setsid(struct bundle *bundle, int holdsession) 1708 { 1709 /* 1710 * Lose the current session. This means getting rid of our pid 1711 * too so that the tty device will really go away, and any getty 1712 * etc will be allowed to restart. 1713 */ 1714 pid_t pid, orig; 1715 int fds[2]; 1716 char done; 1717 struct datalink *dl; 1718 1719 if (!holdsession && bundle_IsDead(bundle)) { 1720 /* 1721 * No need to lose our session after all... we're going away anyway 1722 * 1723 * We should really stop the timer and pause if holdsession is set and 1724 * the bundle's dead, but that leaves other resources lying about :-( 1725 */ 1726 return; 1727 } 1728 1729 orig = getpid(); 1730 if (pipe(fds) == -1) { 1731 log_Printf(LogERROR, "pipe: %s\n", strerror(errno)); 1732 return; 1733 } 1734 switch ((pid = fork())) { 1735 case -1: 1736 log_Printf(LogERROR, "fork: %s\n", strerror(errno)); 1737 close(fds[0]); 1738 close(fds[1]); 1739 return; 1740 case 0: 1741 close(fds[1]); 1742 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1743 close(fds[0]); 1744 if (pipe(fds) == -1) { 1745 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno)); 1746 return; 1747 } 1748 switch ((pid = fork())) { 1749 case -1: 1750 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno)); 1751 close(fds[0]); 1752 close(fds[1]); 1753 return; 1754 case 0: 1755 close(fds[1]); 1756 bundle_LockTun(bundle); /* update pid */ 1757 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1758 close(fds[0]); 1759 setsid(); 1760 bundle_ChangedPID(bundle); 1761 log_Printf(LogDEBUG, "%ld -> %ld: %s session control\n", 1762 (long)orig, (long)getpid(), 1763 holdsession ? "Passed" : "Dropped"); 1764 timer_InitService(0); /* Start the Timer Service */ 1765 break; 1766 default: 1767 close(fds[0]); 1768 /* Give away all our physical locks (to the final process) */ 1769 for (dl = bundle->links; dl; dl = dl->next) 1770 if (dl->state != DATALINK_CLOSED) 1771 physical_ChangedPid(dl->physical, pid); 1772 write(fds[1], "!", 1); /* done */ 1773 close(fds[1]); 1774 _exit(0); 1775 break; 1776 } 1777 break; 1778 default: 1779 close(fds[0]); 1780 /* Give away all our physical locks (to the intermediate process) */ 1781 for (dl = bundle->links; dl; dl = dl->next) 1782 if (dl->state != DATALINK_CLOSED) 1783 physical_ChangedPid(dl->physical, pid); 1784 write(fds[1], "!", 1); /* done */ 1785 close(fds[1]); 1786 if (holdsession) { 1787 int fd, status; 1788 1789 timer_TermService(); 1790 signal(SIGPIPE, SIG_DFL); 1791 signal(SIGALRM, SIG_DFL); 1792 signal(SIGHUP, SIG_DFL); 1793 signal(SIGTERM, SIG_DFL); 1794 signal(SIGINT, SIG_DFL); 1795 signal(SIGQUIT, SIG_DFL); 1796 for (fd = getdtablesize(); fd >= 0; fd--) 1797 close(fd); 1798 /* 1799 * Reap the intermediate process. As we're not exiting but the 1800 * intermediate is, we don't want it to become defunct. 1801 */ 1802 waitpid(pid, &status, 0); 1803 /* Tweak our process arguments.... */ 1804 SetTitle("session owner"); 1805 #ifndef NOSUID 1806 setuid(ID0realuid()); 1807 #endif 1808 /* 1809 * Hang around for a HUP. This should happen as soon as the 1810 * ppp that we passed our ctty descriptor to closes it. 1811 * NOTE: If this process dies, the passed descriptor becomes 1812 * invalid and will give a select() error by setting one 1813 * of the error fds, aborting the other ppp. We don't 1814 * want that to happen ! 1815 */ 1816 pause(); 1817 } 1818 _exit(0); 1819 break; 1820 } 1821 } 1822 1823 unsigned 1824 bundle_HighestState(struct bundle *bundle) 1825 { 1826 struct datalink *dl; 1827 unsigned result = DATALINK_CLOSED; 1828 1829 for (dl = bundle->links; dl; dl = dl->next) 1830 if (result < dl->state) 1831 result = dl->state; 1832 1833 return result; 1834 } 1835 1836 int 1837 bundle_Exception(struct bundle *bundle, int fd) 1838 { 1839 struct datalink *dl; 1840 1841 for (dl = bundle->links; dl; dl = dl->next) 1842 if (dl->physical->fd == fd) { 1843 datalink_Down(dl, CLOSE_NORMAL); 1844 return 1; 1845 } 1846 1847 return 0; 1848 } 1849 1850 void 1851 bundle_AdjustFilters(struct bundle *bundle, struct ncpaddr *local, 1852 struct ncpaddr *remote) 1853 { 1854 filter_AdjustAddr(&bundle->filter.in, local, remote, NULL); 1855 filter_AdjustAddr(&bundle->filter.out, local, remote, NULL); 1856 filter_AdjustAddr(&bundle->filter.dial, local, remote, NULL); 1857 filter_AdjustAddr(&bundle->filter.alive, local, remote, NULL); 1858 } 1859 1860 void 1861 bundle_AdjustDNS(struct bundle *bundle) 1862 { 1863 struct in_addr *dns = bundle->ncp.ipcp.ns.dns; 1864 1865 filter_AdjustAddr(&bundle->filter.in, NULL, NULL, dns); 1866 filter_AdjustAddr(&bundle->filter.out, NULL, NULL, dns); 1867 filter_AdjustAddr(&bundle->filter.dial, NULL, NULL, dns); 1868 filter_AdjustAddr(&bundle->filter.alive, NULL, NULL, dns); 1869 } 1870 1871 void 1872 bundle_CalculateBandwidth(struct bundle *bundle) 1873 { 1874 struct datalink *dl; 1875 int sp, overhead, maxoverhead; 1876 1877 bundle->bandwidth = 0; 1878 bundle->iface->mtu = 0; 1879 maxoverhead = 0; 1880 1881 for (dl = bundle->links; dl; dl = dl->next) { 1882 overhead = ccp_MTUOverhead(&dl->physical->link.ccp); 1883 if (maxoverhead < overhead) 1884 maxoverhead = overhead; 1885 if (dl->state == DATALINK_OPEN) { 1886 if ((sp = dl->mp.bandwidth) == 0 && 1887 (sp = physical_GetSpeed(dl->physical)) == 0) 1888 log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n", 1889 dl->name, dl->physical->name.full); 1890 else 1891 bundle->bandwidth += sp; 1892 if (!bundle->ncp.mp.active) { 1893 bundle->iface->mtu = dl->physical->link.lcp.his_mru; 1894 break; 1895 } 1896 } 1897 } 1898 1899 if (bundle->bandwidth == 0) 1900 bundle->bandwidth = 115200; /* Shrug */ 1901 1902 if (bundle->ncp.mp.active) { 1903 bundle->iface->mtu = bundle->ncp.mp.peer_mrru; 1904 overhead = ccp_MTUOverhead(&bundle->ncp.mp.link.ccp); 1905 if (maxoverhead < overhead) 1906 maxoverhead = overhead; 1907 } else if (!bundle->iface->mtu) 1908 bundle->iface->mtu = DEF_MRU; 1909 1910 #ifndef NORADIUS 1911 if (bundle->radius.valid && bundle->radius.mtu && 1912 bundle->radius.mtu < bundle->iface->mtu) { 1913 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n", 1914 bundle->radius.mtu); 1915 bundle->iface->mtu = bundle->radius.mtu; 1916 } 1917 #endif 1918 1919 if (maxoverhead) { 1920 log_Printf(LogLCP, "Reducing MTU from %lu to %lu (CCP requirement)\n", 1921 bundle->iface->mtu, bundle->iface->mtu - maxoverhead); 1922 bundle->iface->mtu -= maxoverhead; 1923 } 1924 1925 tun_configure(bundle); 1926 1927 route_UpdateMTU(bundle); 1928 } 1929 1930 void 1931 bundle_AutoAdjust(struct bundle *bundle, int percent, int what) 1932 { 1933 struct datalink *dl, *choice, *otherlinkup; 1934 1935 choice = otherlinkup = NULL; 1936 for (dl = bundle->links; dl; dl = dl->next) 1937 if (dl->physical->type == PHYS_AUTO) { 1938 if (dl->state == DATALINK_OPEN) { 1939 if (what == AUTO_DOWN) { 1940 if (choice) 1941 otherlinkup = choice; 1942 choice = dl; 1943 } 1944 } else if (dl->state == DATALINK_CLOSED) { 1945 if (what == AUTO_UP) { 1946 choice = dl; 1947 break; 1948 } 1949 } else { 1950 /* An auto link in an intermediate state - forget it for the moment */ 1951 choice = NULL; 1952 break; 1953 } 1954 } else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN) 1955 otherlinkup = dl; 1956 1957 if (choice) { 1958 if (what == AUTO_UP) { 1959 log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n", 1960 percent, choice->name); 1961 datalink_Up(choice, 1, 1); 1962 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1963 } else if (otherlinkup) { /* Only bring the second-last link down */ 1964 log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n", 1965 percent, choice->name); 1966 datalink_Close(choice, CLOSE_STAYDOWN); 1967 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1968 } 1969 } 1970 } 1971 1972 int 1973 bundle_WantAutoloadTimer(struct bundle *bundle) 1974 { 1975 struct datalink *dl; 1976 int autolink, opened; 1977 1978 if (bundle->phase == PHASE_NETWORK) { 1979 for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next) 1980 if (dl->physical->type == PHYS_AUTO) { 1981 if (++autolink == 2 || (autolink == 1 && opened)) 1982 /* Two auto links or one auto and one open in NETWORK phase */ 1983 return 1; 1984 } else if (dl->state == DATALINK_OPEN) { 1985 opened++; 1986 if (autolink) 1987 /* One auto and one open link in NETWORK phase */ 1988 return 1; 1989 } 1990 } 1991 1992 return 0; 1993 } 1994 1995 void 1996 bundle_ChangedPID(struct bundle *bundle) 1997 { 1998 #ifdef TUNSIFPID 1999 ioctl(bundle->dev.fd, TUNSIFPID, 0); 2000 #endif 2001 } 2002 2003 int 2004 bundle_Uptime(struct bundle *bundle) 2005 { 2006 if (bundle->upat) 2007 return time(NULL) - bundle->upat; 2008 2009 return 0; 2010 } 2011