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 * $FreeBSD$ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/socket.h> 31 #include <netinet/in.h> 32 #include <net/if.h> 33 #include <net/if_tun.h> /* For TUNS* ioctls */ 34 #include <arpa/inet.h> 35 #include <net/route.h> 36 #include <netinet/in_systm.h> 37 #include <netinet/ip.h> 38 #include <sys/un.h> 39 40 #include <errno.h> 41 #include <fcntl.h> 42 #ifdef __OpenBSD__ 43 #include <util.h> 44 #else 45 #include <libutil.h> 46 #endif 47 #include <paths.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <sys/uio.h> 52 #include <sys/wait.h> 53 #if defined(__FreeBSD__) && !defined(NOKLDLOAD) 54 #ifdef NOSUID 55 #include <sys/linker.h> 56 #endif 57 #include <sys/module.h> 58 #endif 59 #include <termios.h> 60 #include <unistd.h> 61 62 #include "layer.h" 63 #include "defs.h" 64 #include "command.h" 65 #include "mbuf.h" 66 #include "log.h" 67 #include "id.h" 68 #include "timer.h" 69 #include "fsm.h" 70 #include "iplist.h" 71 #include "lqr.h" 72 #include "hdlc.h" 73 #include "throughput.h" 74 #include "slcompress.h" 75 #include "ipcp.h" 76 #include "filter.h" 77 #include "descriptor.h" 78 #include "route.h" 79 #include "lcp.h" 80 #include "ccp.h" 81 #include "link.h" 82 #include "mp.h" 83 #ifndef NORADIUS 84 #include "radius.h" 85 #endif 86 #include "bundle.h" 87 #include "async.h" 88 #include "physical.h" 89 #include "auth.h" 90 #include "proto.h" 91 #include "chap.h" 92 #include "tun.h" 93 #include "prompt.h" 94 #include "chat.h" 95 #include "cbcp.h" 96 #include "datalink.h" 97 #include "ip.h" 98 #include "iface.h" 99 #include "server.h" 100 #include "mppe.h" 101 102 #define SCATTER_SEGMENTS 7 /* version, datalink, name, physical, 103 throughput, throughput, device */ 104 105 #define SEND_MAXFD 3 /* Max file descriptors passed through 106 the local domain socket */ 107 108 static int bundle_RemainingIdleTime(struct bundle *); 109 110 static const char * const PhaseNames[] = { 111 "Dead", "Establish", "Authenticate", "Network", "Terminate" 112 }; 113 114 const char * 115 bundle_PhaseName(struct bundle *bundle) 116 { 117 return bundle->phase <= PHASE_TERMINATE ? 118 PhaseNames[bundle->phase] : "unknown"; 119 } 120 121 void 122 bundle_NewPhase(struct bundle *bundle, u_int new) 123 { 124 if (new == bundle->phase) 125 return; 126 127 if (new <= PHASE_TERMINATE) 128 log_Printf(LogPHASE, "bundle: %s\n", PhaseNames[new]); 129 130 switch (new) { 131 case PHASE_DEAD: 132 bundle->phase = new; 133 #ifdef HAVE_DES 134 MPPE_MasterKeyValid = 0; 135 #endif 136 log_DisplayPrompts(); 137 break; 138 139 case PHASE_ESTABLISH: 140 bundle->phase = new; 141 break; 142 143 case PHASE_AUTHENTICATE: 144 bundle->phase = new; 145 log_DisplayPrompts(); 146 break; 147 148 case PHASE_NETWORK: 149 fsm_Up(&bundle->ncp.ipcp.fsm); 150 fsm_Open(&bundle->ncp.ipcp.fsm); 151 bundle->phase = new; 152 log_DisplayPrompts(); 153 break; 154 155 case PHASE_TERMINATE: 156 bundle->phase = new; 157 mp_Down(&bundle->ncp.mp); 158 log_DisplayPrompts(); 159 break; 160 } 161 } 162 163 static void 164 bundle_LayerStart(void *v, struct fsm *fp) 165 { 166 /* The given FSM is about to start up ! */ 167 } 168 169 170 void 171 bundle_Notify(struct bundle *bundle, char c) 172 { 173 if (bundle->notify.fd != -1) { 174 int ret; 175 176 ret = write(bundle->notify.fd, &c, 1); 177 if (c != EX_REDIAL && c != EX_RECONNECT) { 178 if (ret == 1) 179 log_Printf(LogCHAT, "Parent notified of %s\n", 180 c == EX_NORMAL ? "success" : "failure"); 181 else 182 log_Printf(LogERROR, "Failed to notify parent of success\n"); 183 close(bundle->notify.fd); 184 bundle->notify.fd = -1; 185 } else if (ret == 1) 186 log_Printf(LogCHAT, "Parent notified of %s\n", ex_desc(c)); 187 else 188 log_Printf(LogERROR, "Failed to notify parent of %s\n", ex_desc(c)); 189 } 190 } 191 192 static void 193 bundle_ClearQueues(void *v) 194 { 195 struct bundle *bundle = (struct bundle *)v; 196 struct datalink *dl; 197 198 log_Printf(LogPHASE, "Clearing choked output queue\n"); 199 timer_Stop(&bundle->choked.timer); 200 201 /* 202 * Emergency time: 203 * 204 * We've had a full queue for PACKET_DEL_SECS seconds without being 205 * able to get rid of any of the packets. We've probably given up 206 * on the redials at this point, and the queued data has almost 207 * definitely been timed out by the layer above. As this is preventing 208 * us from reading the TUN_NAME device (we don't want to buffer stuff 209 * indefinitely), we may as well nuke this data and start with a clean 210 * slate ! 211 * 212 * Unfortunately, this has the side effect of shafting any compression 213 * dictionaries in use (causing the relevant RESET_REQ/RESET_ACK). 214 */ 215 216 ip_DeleteQueue(&bundle->ncp.ipcp); 217 mp_DeleteQueue(&bundle->ncp.mp); 218 for (dl = bundle->links; dl; dl = dl->next) 219 physical_DeleteQueue(dl->physical); 220 } 221 222 static void 223 bundle_LinkAdded(struct bundle *bundle, struct datalink *dl) 224 { 225 bundle->phys_type.all |= dl->physical->type; 226 if (dl->state == DATALINK_OPEN) 227 bundle->phys_type.open |= dl->physical->type; 228 229 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 230 != bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED) 231 /* We may need to start our idle timer */ 232 bundle_StartIdleTimer(bundle, 0); 233 } 234 235 void 236 bundle_LinksRemoved(struct bundle *bundle) 237 { 238 struct datalink *dl; 239 240 bundle->phys_type.all = bundle->phys_type.open = 0; 241 for (dl = bundle->links; dl; dl = dl->next) 242 bundle_LinkAdded(bundle, dl); 243 244 bundle_CalculateBandwidth(bundle); 245 mp_CheckAutoloadTimer(&bundle->ncp.mp); 246 247 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 248 == bundle->phys_type.open) 249 bundle_StopIdleTimer(bundle); 250 } 251 252 static void 253 bundle_LayerUp(void *v, struct fsm *fp) 254 { 255 /* 256 * The given fsm is now up 257 * If it's an LCP, adjust our phys_mode.open value and check the 258 * autoload timer. 259 * If it's the first NCP, calculate our bandwidth 260 * If it's the first NCP, set our ``upat'' time 261 * If it's the first NCP, start the idle timer. 262 * If it's an NCP, tell our -background parent to go away. 263 * If it's the first NCP, start the autoload timer 264 */ 265 struct bundle *bundle = (struct bundle *)v; 266 267 if (fp->proto == PROTO_LCP) { 268 struct physical *p = link2physical(fp->link); 269 270 bundle_LinkAdded(bundle, p->dl); 271 mp_CheckAutoloadTimer(&bundle->ncp.mp); 272 } else if (fp->proto == PROTO_IPCP) { 273 bundle_CalculateBandwidth(fp->bundle); 274 time(&bundle->upat); 275 bundle_StartIdleTimer(bundle, 0); 276 bundle_Notify(bundle, EX_NORMAL); 277 mp_CheckAutoloadTimer(&fp->bundle->ncp.mp); 278 } 279 } 280 281 static void 282 bundle_LayerDown(void *v, struct fsm *fp) 283 { 284 /* 285 * The given FSM has been told to come down. 286 * If it's our last NCP, stop the idle timer. 287 * If it's our last NCP, clear our ``upat'' value. 288 * If it's our last NCP, stop the autoload timer 289 * If it's an LCP, adjust our phys_type.open value and any timers. 290 * If it's an LCP and we're in multilink mode, adjust our tun 291 * If it's the last LCP, down all NCPs 292 * speed and make sure our minimum sequence number is adjusted. 293 */ 294 295 struct bundle *bundle = (struct bundle *)v; 296 297 if (fp->proto == PROTO_IPCP) { 298 bundle_StopIdleTimer(bundle); 299 bundle->upat = 0; 300 mp_StopAutoloadTimer(&bundle->ncp.mp); 301 } else if (fp->proto == PROTO_LCP) { 302 struct datalink *dl; 303 struct datalink *lost; 304 int others_active; 305 306 bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */ 307 308 lost = NULL; 309 others_active = 0; 310 for (dl = bundle->links; dl; dl = dl->next) { 311 if (fp == &dl->physical->link.lcp.fsm) 312 lost = dl; 313 else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 314 others_active++; 315 } 316 317 if (bundle->ncp.mp.active) { 318 bundle_CalculateBandwidth(bundle); 319 320 if (lost) 321 mp_LinkLost(&bundle->ncp.mp, lost); 322 else 323 log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n", 324 fp->link->name); 325 } 326 327 if (!others_active) 328 /* Down the NCPs. We don't expect to get fsm_Close()d ourself ! */ 329 fsm2initial(&bundle->ncp.ipcp.fsm); 330 } 331 } 332 333 static void 334 bundle_LayerFinish(void *v, struct fsm *fp) 335 { 336 /* The given fsm is now down (fp cannot be NULL) 337 * 338 * If it's the last NCP, fsm_Close all LCPs 339 */ 340 341 struct bundle *bundle = (struct bundle *)v; 342 struct datalink *dl; 343 344 if (fp->proto == PROTO_IPCP) { 345 if (bundle_Phase(bundle) != PHASE_DEAD) 346 bundle_NewPhase(bundle, PHASE_TERMINATE); 347 for (dl = bundle->links; dl; dl = dl->next) 348 if (dl->state == DATALINK_OPEN) 349 datalink_Close(dl, CLOSE_STAYDOWN); 350 fsm2initial(fp); 351 } 352 } 353 354 int 355 bundle_LinkIsUp(const struct bundle *bundle) 356 { 357 return bundle->ncp.ipcp.fsm.state == ST_OPENED; 358 } 359 360 void 361 bundle_Close(struct bundle *bundle, const char *name, int how) 362 { 363 /* 364 * Please close the given datalink. 365 * If name == NULL or name is the last datalink, fsm_Close all NCPs 366 * (except our MP) 367 * If it isn't the last datalink, just Close that datalink. 368 */ 369 370 struct datalink *dl, *this_dl; 371 int others_active; 372 373 others_active = 0; 374 this_dl = NULL; 375 376 for (dl = bundle->links; dl; dl = dl->next) { 377 if (name && !strcasecmp(name, dl->name)) 378 this_dl = dl; 379 if (name == NULL || this_dl == dl) { 380 switch (how) { 381 case CLOSE_LCP: 382 datalink_DontHangup(dl); 383 break; 384 case CLOSE_STAYDOWN: 385 datalink_StayDown(dl); 386 break; 387 } 388 } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 389 others_active++; 390 } 391 392 if (name && this_dl == NULL) { 393 log_Printf(LogWARN, "%s: Invalid datalink name\n", name); 394 return; 395 } 396 397 if (!others_active) { 398 bundle_StopIdleTimer(bundle); 399 if (bundle->ncp.ipcp.fsm.state > ST_CLOSED || 400 bundle->ncp.ipcp.fsm.state == ST_STARTING) 401 fsm_Close(&bundle->ncp.ipcp.fsm); 402 else { 403 fsm2initial(&bundle->ncp.ipcp.fsm); 404 for (dl = bundle->links; dl; dl = dl->next) 405 datalink_Close(dl, how); 406 } 407 } else if (this_dl && this_dl->state != DATALINK_CLOSED && 408 this_dl->state != DATALINK_HANGUP) 409 datalink_Close(this_dl, how); 410 } 411 412 void 413 bundle_Down(struct bundle *bundle, int how) 414 { 415 struct datalink *dl; 416 417 for (dl = bundle->links; dl; dl = dl->next) 418 datalink_Down(dl, how); 419 } 420 421 static size_t 422 bundle_FillQueues(struct bundle *bundle) 423 { 424 size_t total; 425 426 if (bundle->ncp.mp.active) 427 total = mp_FillQueues(bundle); 428 else { 429 struct datalink *dl; 430 size_t add; 431 432 for (total = 0, dl = bundle->links; dl; dl = dl->next) 433 if (dl->state == DATALINK_OPEN) { 434 add = link_QueueLen(&dl->physical->link); 435 if (add == 0 && dl->physical->out == NULL) 436 add = ip_PushPacket(&dl->physical->link, bundle); 437 total += add; 438 } 439 } 440 441 return total + ip_QueueLen(&bundle->ncp.ipcp); 442 } 443 444 static int 445 bundle_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 446 { 447 struct bundle *bundle = descriptor2bundle(d); 448 struct datalink *dl; 449 int result, nlinks; 450 u_short ifqueue; 451 size_t queued; 452 453 result = 0; 454 455 /* If there are aren't many packets queued, look for some more. */ 456 for (nlinks = 0, dl = bundle->links; dl; dl = dl->next) 457 nlinks++; 458 459 if (nlinks) { 460 queued = r ? bundle_FillQueues(bundle) : ip_QueueLen(&bundle->ncp.ipcp); 461 462 if (r && (bundle->phase == PHASE_NETWORK || 463 bundle->phys_type.all & PHYS_AUTO)) { 464 /* enough surplus so that we can tell if we're getting swamped */ 465 ifqueue = nlinks > bundle->cfg.ifqueue ? nlinks : bundle->cfg.ifqueue; 466 if (queued < ifqueue) { 467 /* Not enough - select() for more */ 468 if (bundle->choked.timer.state == TIMER_RUNNING) 469 timer_Stop(&bundle->choked.timer); /* Not needed any more */ 470 FD_SET(bundle->dev.fd, r); 471 if (*n < bundle->dev.fd + 1) 472 *n = bundle->dev.fd + 1; 473 log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd); 474 result++; 475 } else if (bundle->choked.timer.state == TIMER_STOPPED) { 476 bundle->choked.timer.func = bundle_ClearQueues; 477 bundle->choked.timer.name = "output choke"; 478 bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS; 479 bundle->choked.timer.arg = bundle; 480 timer_Start(&bundle->choked.timer); 481 } 482 } 483 } 484 485 #ifndef NORADIUS 486 result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n); 487 #endif 488 489 /* Which links need a select() ? */ 490 for (dl = bundle->links; dl; dl = dl->next) 491 result += descriptor_UpdateSet(&dl->desc, r, w, e, n); 492 493 /* 494 * This *MUST* be called after the datalink UpdateSet()s as it 495 * might be ``holding'' one of the datalinks (death-row) and 496 * wants to be able to de-select() it from the descriptor set. 497 */ 498 result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n); 499 500 return result; 501 } 502 503 static int 504 bundle_IsSet(struct fdescriptor *d, const fd_set *fdset) 505 { 506 struct bundle *bundle = descriptor2bundle(d); 507 struct datalink *dl; 508 509 for (dl = bundle->links; dl; dl = dl->next) 510 if (descriptor_IsSet(&dl->desc, fdset)) 511 return 1; 512 513 #ifndef NORADIUS 514 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 515 return 1; 516 #endif 517 518 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 519 return 1; 520 521 return FD_ISSET(bundle->dev.fd, fdset); 522 } 523 524 static void 525 bundle_DescriptorRead(struct fdescriptor *d, struct bundle *bundle, 526 const fd_set *fdset) 527 { 528 struct datalink *dl; 529 unsigned secs; 530 531 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 532 descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset); 533 534 for (dl = bundle->links; dl; dl = dl->next) 535 if (descriptor_IsSet(&dl->desc, fdset)) 536 descriptor_Read(&dl->desc, bundle, fdset); 537 538 #ifndef NORADIUS 539 if (descriptor_IsSet(&bundle->radius.desc, fdset)) 540 descriptor_Read(&bundle->radius.desc, bundle, fdset); 541 #endif 542 543 if (FD_ISSET(bundle->dev.fd, fdset)) { 544 struct tun_data tun; 545 int n, pri; 546 char *data; 547 size_t sz; 548 549 if (bundle->dev.header) { 550 data = (char *)&tun; 551 sz = sizeof tun; 552 } else { 553 data = tun.data; 554 sz = sizeof tun.data; 555 } 556 557 /* something to read from tun */ 558 559 n = read(bundle->dev.fd, data, sz); 560 if (n < 0) { 561 log_Printf(LogWARN, "%s: read: %s\n", bundle->dev.Name, strerror(errno)); 562 return; 563 } 564 565 if (bundle->dev.header) { 566 n -= sz - sizeof tun.data; 567 if (n <= 0) { 568 log_Printf(LogERROR, "%s: read: Got only %d bytes of data !\n", 569 bundle->dev.Name, n); 570 return; 571 } 572 if (ntohl(tun.header.family) != AF_INET) 573 /* XXX: Should be maintaining drop/family counts ! */ 574 return; 575 } 576 577 if (((struct ip *)tun.data)->ip_dst.s_addr == 578 bundle->ncp.ipcp.my_ip.s_addr) { 579 /* we've been asked to send something addressed *to* us :( */ 580 if (Enabled(bundle, OPT_LOOPBACK)) { 581 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.in, NULL, NULL); 582 if (pri >= 0) { 583 n += sz - sizeof tun.data; 584 write(bundle->dev.fd, data, n); 585 log_Printf(LogDEBUG, "Looped back packet addressed to myself\n"); 586 } 587 return; 588 } else 589 log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n"); 590 } 591 592 /* 593 * Process on-demand dialup. Output packets are queued within tunnel 594 * device until IPCP is opened. 595 */ 596 597 if (bundle_Phase(bundle) == PHASE_DEAD) { 598 /* 599 * Note, we must be in AUTO mode :-/ otherwise our interface should 600 * *not* be UP and we can't receive data 601 */ 602 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.dial, NULL, NULL); 603 if (pri >= 0) 604 bundle_Open(bundle, NULL, PHYS_AUTO, 0); 605 else 606 /* 607 * Drop the packet. If we were to queue it, we'd just end up with 608 * a pile of timed-out data in our output queue by the time we get 609 * around to actually dialing. We'd also prematurely reach the 610 * threshold at which we stop select()ing to read() the tun 611 * device - breaking auto-dial. 612 */ 613 return; 614 } 615 616 secs = 0; 617 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.out, NULL, &secs); 618 if (pri >= 0) { 619 /* Prepend the number of seconds timeout given in the filter */ 620 tun.header.timeout = secs; 621 ip_Enqueue(&bundle->ncp.ipcp, pri, (char *)&tun, n + sizeof tun.header); 622 } 623 } 624 } 625 626 static int 627 bundle_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle, 628 const fd_set *fdset) 629 { 630 struct datalink *dl; 631 int result = 0; 632 633 /* This is not actually necessary as struct mpserver doesn't Write() */ 634 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 635 descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset); 636 637 for (dl = bundle->links; dl; dl = dl->next) 638 if (descriptor_IsSet(&dl->desc, fdset)) 639 result += descriptor_Write(&dl->desc, bundle, fdset); 640 641 return result; 642 } 643 644 void 645 bundle_LockTun(struct bundle *bundle) 646 { 647 FILE *lockfile; 648 char pidfile[MAXPATHLEN]; 649 650 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 651 lockfile = ID0fopen(pidfile, "w"); 652 if (lockfile != NULL) { 653 fprintf(lockfile, "%d\n", (int)getpid()); 654 fclose(lockfile); 655 } 656 #ifndef RELEASE_CRUNCH 657 else 658 log_Printf(LogERROR, "Warning: Can't create %s: %s\n", 659 pidfile, strerror(errno)); 660 #endif 661 } 662 663 static void 664 bundle_UnlockTun(struct bundle *bundle) 665 { 666 char pidfile[MAXPATHLEN]; 667 668 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 669 ID0unlink(pidfile); 670 } 671 672 struct bundle * 673 bundle_Create(const char *prefix, int type, int unit) 674 { 675 static struct bundle bundle; /* there can be only one */ 676 int enoentcount, err, minunit, maxunit; 677 const char *ifname; 678 #if defined(__FreeBSD__) && !defined(NOKLDLOAD) 679 int kldtried; 680 #endif 681 #if defined(TUNSIFMODE) || defined(TUNSLMODE) || defined(TUNSIFHEAD) 682 int iff; 683 #endif 684 685 if (bundle.iface != NULL) { /* Already allocated ! */ 686 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n"); 687 return NULL; 688 } 689 690 if (unit == -1) { 691 minunit = 0; 692 maxunit = -1; 693 } else { 694 minunit = unit; 695 maxunit = unit + 1; 696 } 697 err = ENOENT; 698 enoentcount = 0; 699 #if defined(__FreeBSD__) && !defined(NOKLDLOAD) 700 kldtried = 0; 701 #endif 702 for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) { 703 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d", 704 prefix, bundle.unit); 705 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR); 706 if (bundle.dev.fd >= 0) 707 break; 708 else if (errno == ENXIO || errno == ENOENT) { 709 #if defined(__FreeBSD__) && !defined(NOKLDLOAD) 710 if (bundle.unit == minunit && !kldtried++) { 711 /* 712 * Attempt to load the tunnel interface KLD if it isn't loaded 713 * already. 714 */ 715 if (modfind("if_tun") == -1) { 716 if (ID0kldload("if_tun") != -1) { 717 bundle.unit--; 718 continue; 719 } 720 log_Printf(LogWARN, "kldload: if_tun: %s\n", strerror(errno)); 721 } 722 } 723 #endif 724 err = errno; 725 break; 726 } else if (errno == ENOENT) { 727 if (++enoentcount > 2) 728 break; 729 } else 730 err = errno; 731 } 732 733 if (bundle.dev.fd < 0) { 734 if (unit == -1) 735 log_Printf(LogWARN, "No available tunnel devices found (%s)\n", 736 strerror(err)); 737 else 738 log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err)); 739 return NULL; 740 } 741 742 log_SetTun(bundle.unit); 743 744 ifname = strrchr(bundle.dev.Name, '/'); 745 if (ifname == NULL) 746 ifname = bundle.dev.Name; 747 else 748 ifname++; 749 750 bundle.iface = iface_Create(ifname); 751 if (bundle.iface == NULL) { 752 close(bundle.dev.fd); 753 return NULL; 754 } 755 756 #ifdef TUNSIFMODE 757 /* Make sure we're POINTOPOINT */ 758 iff = IFF_POINTOPOINT; 759 if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0) 760 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n", 761 strerror(errno)); 762 #endif 763 764 #ifdef TUNSLMODE 765 /* Make sure we're not prepending sockaddrs */ 766 iff = 0; 767 if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0) 768 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n", 769 strerror(errno)); 770 #endif 771 772 #ifdef TUNSIFHEAD 773 /* We want the address family please ! */ 774 iff = 1; 775 if (ID0ioctl(bundle.dev.fd, TUNSIFHEAD, &iff) < 0) { 776 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFHEAD): %s\n", 777 strerror(errno)); 778 bundle.dev.header = 0; 779 } else 780 bundle.dev.header = 1; 781 #else 782 #ifdef __OpenBSD__ 783 /* Always present for OpenBSD */ 784 bundle.dev.header = 1; 785 #else 786 /* 787 * If TUNSIFHEAD isn't available and we're not OpenBSD, assume 788 * everything's AF_INET (hopefully the tun device won't pass us 789 * anything else !). 790 */ 791 bundle.dev.header = 0; 792 #endif 793 #endif 794 795 if (!iface_SetFlags(bundle.iface, IFF_UP)) { 796 iface_Destroy(bundle.iface); 797 bundle.iface = NULL; 798 close(bundle.dev.fd); 799 return NULL; 800 } 801 802 log_Printf(LogPHASE, "Using interface: %s\n", ifname); 803 804 bundle.bandwidth = 0; 805 bundle.mtu = 1500; 806 bundle.routing_seq = 0; 807 bundle.phase = PHASE_DEAD; 808 bundle.CleaningUp = 0; 809 bundle.NatEnabled = 0; 810 811 bundle.fsm.LayerStart = bundle_LayerStart; 812 bundle.fsm.LayerUp = bundle_LayerUp; 813 bundle.fsm.LayerDown = bundle_LayerDown; 814 bundle.fsm.LayerFinish = bundle_LayerFinish; 815 bundle.fsm.object = &bundle; 816 817 bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT; 818 bundle.cfg.idle.min_timeout = 0; 819 *bundle.cfg.auth.name = '\0'; 820 *bundle.cfg.auth.key = '\0'; 821 bundle.cfg.opt = OPT_SROUTES | OPT_IDCHECK | OPT_LOOPBACK | OPT_TCPMSSFIXUP | 822 OPT_THROUGHPUT | OPT_UTMP; 823 *bundle.cfg.label = '\0'; 824 bundle.cfg.mtu = DEF_MTU; 825 bundle.cfg.ifqueue = DEF_IFQUEUE; 826 bundle.cfg.choked.timeout = CHOKED_TIMEOUT; 827 bundle.phys_type.all = type; 828 bundle.phys_type.open = 0; 829 bundle.upat = 0; 830 831 bundle.links = datalink_Create("deflink", &bundle, type); 832 if (bundle.links == NULL) { 833 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno)); 834 iface_Destroy(bundle.iface); 835 bundle.iface = NULL; 836 close(bundle.dev.fd); 837 return NULL; 838 } 839 840 bundle.desc.type = BUNDLE_DESCRIPTOR; 841 bundle.desc.UpdateSet = bundle_UpdateSet; 842 bundle.desc.IsSet = bundle_IsSet; 843 bundle.desc.Read = bundle_DescriptorRead; 844 bundle.desc.Write = bundle_DescriptorWrite; 845 846 mp_Init(&bundle.ncp.mp, &bundle); 847 848 /* Send over the first physical link by default */ 849 ipcp_Init(&bundle.ncp.ipcp, &bundle, &bundle.links->physical->link, 850 &bundle.fsm); 851 852 memset(&bundle.filter, '\0', sizeof bundle.filter); 853 bundle.filter.in.fragok = bundle.filter.in.logok = 1; 854 bundle.filter.in.name = "IN"; 855 bundle.filter.out.fragok = bundle.filter.out.logok = 1; 856 bundle.filter.out.name = "OUT"; 857 bundle.filter.dial.name = "DIAL"; 858 bundle.filter.dial.logok = 1; 859 bundle.filter.alive.name = "ALIVE"; 860 bundle.filter.alive.logok = 1; 861 { 862 int i; 863 for (i = 0; i < MAXFILTERS; i++) { 864 bundle.filter.in.rule[i].f_action = A_NONE; 865 bundle.filter.out.rule[i].f_action = A_NONE; 866 bundle.filter.dial.rule[i].f_action = A_NONE; 867 bundle.filter.alive.rule[i].f_action = A_NONE; 868 } 869 } 870 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer); 871 bundle.idle.done = 0; 872 bundle.notify.fd = -1; 873 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer); 874 #ifndef NORADIUS 875 radius_Init(&bundle.radius); 876 #endif 877 878 /* Clean out any leftover crud */ 879 iface_Clear(bundle.iface, IFACE_CLEAR_ALL); 880 881 bundle_LockTun(&bundle); 882 883 return &bundle; 884 } 885 886 static void 887 bundle_DownInterface(struct bundle *bundle) 888 { 889 route_IfDelete(bundle, 1); 890 iface_ClearFlags(bundle->iface, IFF_UP); 891 } 892 893 void 894 bundle_Destroy(struct bundle *bundle) 895 { 896 struct datalink *dl; 897 898 /* 899 * Clean up the interface. We don't need to timer_Stop()s, mp_Down(), 900 * ipcp_CleanInterface() and bundle_DownInterface() unless we're getting 901 * out under exceptional conditions such as a descriptor exception. 902 */ 903 timer_Stop(&bundle->idle.timer); 904 timer_Stop(&bundle->choked.timer); 905 mp_Down(&bundle->ncp.mp); 906 ipcp_CleanInterface(&bundle->ncp.ipcp); 907 bundle_DownInterface(bundle); 908 909 #ifndef NORADIUS 910 /* Tell the radius server the bad news */ 911 log_Printf(LogDEBUG, "Radius: Destroy called from bundle_Destroy\n"); 912 radius_Destroy(&bundle->radius); 913 #endif 914 915 /* Again, these are all DATALINK_CLOSED unless we're abending */ 916 dl = bundle->links; 917 while (dl) 918 dl = datalink_Destroy(dl); 919 920 ipcp_Destroy(&bundle->ncp.ipcp); 921 922 close(bundle->dev.fd); 923 bundle_UnlockTun(bundle); 924 925 /* In case we never made PHASE_NETWORK */ 926 bundle_Notify(bundle, EX_ERRDEAD); 927 928 iface_Destroy(bundle->iface); 929 bundle->iface = NULL; 930 } 931 932 struct rtmsg { 933 struct rt_msghdr m_rtm; 934 char m_space[64]; 935 }; 936 937 int 938 bundle_SetRoute(struct bundle *bundle, int cmd, struct in_addr dst, 939 struct in_addr gateway, struct in_addr mask, int bang, int ssh) 940 { 941 struct rtmsg rtmes; 942 int s, nb, wb; 943 char *cp; 944 const char *cmdstr; 945 struct sockaddr_in rtdata; 946 int result = 1; 947 948 if (bang) 949 cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!"); 950 else 951 cmdstr = (cmd == RTM_ADD ? "Add" : "Delete"); 952 s = ID0socket(PF_ROUTE, SOCK_RAW, 0); 953 if (s < 0) { 954 log_Printf(LogERROR, "bundle_SetRoute: socket(): %s\n", strerror(errno)); 955 return result; 956 } 957 memset(&rtmes, '\0', sizeof rtmes); 958 rtmes.m_rtm.rtm_version = RTM_VERSION; 959 rtmes.m_rtm.rtm_type = cmd; 960 rtmes.m_rtm.rtm_addrs = RTA_DST; 961 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; 962 rtmes.m_rtm.rtm_pid = getpid(); 963 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 964 965 if (cmd == RTM_ADD || cmd == RTM_CHANGE) { 966 if (bundle->ncp.ipcp.cfg.sendpipe > 0) { 967 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.ipcp.cfg.sendpipe; 968 rtmes.m_rtm.rtm_inits |= RTV_SPIPE; 969 } 970 if (bundle->ncp.ipcp.cfg.recvpipe > 0) { 971 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.ipcp.cfg.recvpipe; 972 rtmes.m_rtm.rtm_inits |= RTV_RPIPE; 973 } 974 } 975 976 memset(&rtdata, '\0', sizeof rtdata); 977 rtdata.sin_len = sizeof rtdata; 978 rtdata.sin_family = AF_INET; 979 rtdata.sin_port = 0; 980 rtdata.sin_addr = dst; 981 982 cp = rtmes.m_space; 983 memcpy(cp, &rtdata, rtdata.sin_len); 984 cp += rtdata.sin_len; 985 if (cmd == RTM_ADD) { 986 if (gateway.s_addr == INADDR_ANY) { 987 if (!ssh) 988 log_Printf(LogERROR, "bundle_SetRoute: Cannot add a route with" 989 " destination 0.0.0.0\n"); 990 close(s); 991 return result; 992 } else { 993 rtdata.sin_addr = gateway; 994 memcpy(cp, &rtdata, rtdata.sin_len); 995 cp += rtdata.sin_len; 996 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; 997 } 998 } 999 1000 if (dst.s_addr == INADDR_ANY) 1001 mask.s_addr = INADDR_ANY; 1002 1003 if (cmd == RTM_ADD || dst.s_addr == INADDR_ANY) { 1004 rtdata.sin_addr = mask; 1005 memcpy(cp, &rtdata, rtdata.sin_len); 1006 cp += rtdata.sin_len; 1007 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; 1008 } 1009 1010 nb = cp - (char *) &rtmes; 1011 rtmes.m_rtm.rtm_msglen = nb; 1012 wb = ID0write(s, &rtmes, nb); 1013 if (wb < 0) { 1014 log_Printf(LogTCPIP, "bundle_SetRoute failure:\n"); 1015 log_Printf(LogTCPIP, "bundle_SetRoute: Cmd = %s\n", cmdstr); 1016 log_Printf(LogTCPIP, "bundle_SetRoute: Dst = %s\n", inet_ntoa(dst)); 1017 log_Printf(LogTCPIP, "bundle_SetRoute: Gateway = %s\n", 1018 inet_ntoa(gateway)); 1019 log_Printf(LogTCPIP, "bundle_SetRoute: Mask = %s\n", inet_ntoa(mask)); 1020 failed: 1021 if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST || 1022 (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) { 1023 if (!bang) { 1024 log_Printf(LogWARN, "Add route failed: %s already exists\n", 1025 dst.s_addr == 0 ? "default" : inet_ntoa(dst)); 1026 result = 0; /* Don't add to our dynamic list */ 1027 } else { 1028 rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE; 1029 if ((wb = ID0write(s, &rtmes, nb)) < 0) 1030 goto failed; 1031 } 1032 } else if (cmd == RTM_DELETE && 1033 (rtmes.m_rtm.rtm_errno == ESRCH || 1034 (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) { 1035 if (!bang) 1036 log_Printf(LogWARN, "Del route failed: %s: Non-existent\n", 1037 inet_ntoa(dst)); 1038 } else if (rtmes.m_rtm.rtm_errno == 0) { 1039 if (!ssh || errno != ENETUNREACH) 1040 log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr, 1041 inet_ntoa(dst), strerror(errno)); 1042 } else 1043 log_Printf(LogWARN, "%s route failed: %s: %s\n", 1044 cmdstr, inet_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno)); 1045 } 1046 log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %x, gateway = %x\n", 1047 wb, cmdstr, (unsigned)dst.s_addr, (unsigned)gateway.s_addr); 1048 close(s); 1049 1050 return result; 1051 } 1052 1053 void 1054 bundle_LinkClosed(struct bundle *bundle, struct datalink *dl) 1055 { 1056 /* 1057 * Our datalink has closed. 1058 * CleanDatalinks() (called from DoLoop()) will remove closed 1059 * BACKGROUND, FOREGROUND and DIRECT links. 1060 * If it's the last data link, enter phase DEAD. 1061 * 1062 * NOTE: dl may not be in our list (bundle_SendDatalink()) ! 1063 */ 1064 1065 struct datalink *odl; 1066 int other_links; 1067 1068 log_SetTtyCommandMode(dl); 1069 1070 other_links = 0; 1071 for (odl = bundle->links; odl; odl = odl->next) 1072 if (odl != dl && odl->state != DATALINK_CLOSED) 1073 other_links++; 1074 1075 if (!other_links) { 1076 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */ 1077 bundle_DownInterface(bundle); 1078 fsm2initial(&bundle->ncp.ipcp.fsm); 1079 bundle_NewPhase(bundle, PHASE_DEAD); 1080 bundle_StopIdleTimer(bundle); 1081 } 1082 } 1083 1084 void 1085 bundle_Open(struct bundle *bundle, const char *name, int mask, int force) 1086 { 1087 /* 1088 * Please open the given datalink, or all if name == NULL 1089 */ 1090 struct datalink *dl; 1091 1092 for (dl = bundle->links; dl; dl = dl->next) 1093 if (name == NULL || !strcasecmp(dl->name, name)) { 1094 if ((mask & dl->physical->type) && 1095 (dl->state == DATALINK_CLOSED || 1096 (force && dl->state == DATALINK_OPENING && 1097 dl->dial.timer.state == TIMER_RUNNING) || 1098 dl->state == DATALINK_READY)) { 1099 timer_Stop(&dl->dial.timer); /* We're finished with this */ 1100 datalink_Up(dl, 1, 1); 1101 if (mask & PHYS_AUTO) 1102 break; /* Only one AUTO link at a time */ 1103 } 1104 if (name != NULL) 1105 break; 1106 } 1107 } 1108 1109 struct datalink * 1110 bundle2datalink(struct bundle *bundle, const char *name) 1111 { 1112 struct datalink *dl; 1113 1114 if (name != NULL) { 1115 for (dl = bundle->links; dl; dl = dl->next) 1116 if (!strcasecmp(dl->name, name)) 1117 return dl; 1118 } else if (bundle->links && !bundle->links->next) 1119 return bundle->links; 1120 1121 return NULL; 1122 } 1123 1124 int 1125 bundle_ShowLinks(struct cmdargs const *arg) 1126 { 1127 struct datalink *dl; 1128 struct pppThroughput *t; 1129 unsigned long long octets; 1130 int secs; 1131 1132 for (dl = arg->bundle->links; dl; dl = dl->next) { 1133 octets = MAX(dl->physical->link.stats.total.in.OctetsPerSecond, 1134 dl->physical->link.stats.total.out.OctetsPerSecond); 1135 1136 prompt_Printf(arg->prompt, "Name: %s [%s, %s]", 1137 dl->name, mode2Nam(dl->physical->type), datalink_State(dl)); 1138 if (dl->physical->link.stats.total.rolling && dl->state == DATALINK_OPEN) 1139 prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)", 1140 dl->mp.bandwidth ? dl->mp.bandwidth : 1141 physical_GetSpeed(dl->physical), 1142 octets * 8, octets); 1143 prompt_Printf(arg->prompt, "\n"); 1144 } 1145 1146 t = &arg->bundle->ncp.mp.link.stats.total; 1147 octets = MAX(t->in.OctetsPerSecond, t->out.OctetsPerSecond); 1148 secs = t->downtime ? 0 : throughput_uptime(t); 1149 if (secs > t->SamplePeriod) 1150 secs = t->SamplePeriod; 1151 if (secs) 1152 prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)" 1153 " over the last %d secs\n", octets * 8, octets, secs); 1154 1155 return 0; 1156 } 1157 1158 static const char * 1159 optval(struct bundle *bundle, int bit) 1160 { 1161 return (bundle->cfg.opt & bit) ? "enabled" : "disabled"; 1162 } 1163 1164 int 1165 bundle_ShowStatus(struct cmdargs const *arg) 1166 { 1167 int remaining; 1168 1169 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle)); 1170 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name); 1171 prompt_Printf(arg->prompt, " Interface: %s @ %lubps", 1172 arg->bundle->iface->name, arg->bundle->bandwidth); 1173 1174 if (arg->bundle->upat) { 1175 int secs = time(NULL) - arg->bundle->upat; 1176 1177 prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600, 1178 (secs / 60) % 60, secs % 60); 1179 } 1180 prompt_Printf(arg->prompt, "\n Queued: %lu of %u\n", 1181 (unsigned long)ip_QueueLen(&arg->bundle->ncp.ipcp), 1182 arg->bundle->cfg.ifqueue); 1183 1184 prompt_Printf(arg->prompt, "\nDefaults:\n"); 1185 prompt_Printf(arg->prompt, " Label: %s\n", 1186 arg->bundle->cfg.label); 1187 prompt_Printf(arg->prompt, " Auth name: %s\n", 1188 arg->bundle->cfg.auth.name); 1189 prompt_Printf(arg->prompt, " Diagnostic socket: "); 1190 if (*server.cfg.sockname != '\0') { 1191 prompt_Printf(arg->prompt, "%s", server.cfg.sockname); 1192 if (server.cfg.mask != (mode_t)-1) 1193 prompt_Printf(arg->prompt, ", mask 0%03o", (int)server.cfg.mask); 1194 prompt_Printf(arg->prompt, "%s\n", server.fd == -1 ? " (not open)" : ""); 1195 } else if (server.cfg.port != 0) 1196 prompt_Printf(arg->prompt, "TCP port %d%s\n", server.cfg.port, 1197 server.fd == -1 ? " (not open)" : ""); 1198 else 1199 prompt_Printf(arg->prompt, "none\n"); 1200 1201 prompt_Printf(arg->prompt, " Choked Timer: %ds\n", 1202 arg->bundle->cfg.choked.timeout); 1203 1204 #ifndef NORADIUS 1205 radius_Show(&arg->bundle->radius, arg->prompt); 1206 #endif 1207 1208 prompt_Printf(arg->prompt, " Idle Timer: "); 1209 if (arg->bundle->cfg.idle.timeout) { 1210 prompt_Printf(arg->prompt, "%ds", arg->bundle->cfg.idle.timeout); 1211 if (arg->bundle->cfg.idle.min_timeout) 1212 prompt_Printf(arg->prompt, ", min %ds", 1213 arg->bundle->cfg.idle.min_timeout); 1214 remaining = bundle_RemainingIdleTime(arg->bundle); 1215 if (remaining != -1) 1216 prompt_Printf(arg->prompt, " (%ds remaining)", remaining); 1217 prompt_Printf(arg->prompt, "\n"); 1218 } else 1219 prompt_Printf(arg->prompt, "disabled\n"); 1220 prompt_Printf(arg->prompt, " MTU: "); 1221 if (arg->bundle->cfg.mtu) 1222 prompt_Printf(arg->prompt, "%d\n", arg->bundle->cfg.mtu); 1223 else 1224 prompt_Printf(arg->prompt, "unspecified\n"); 1225 1226 prompt_Printf(arg->prompt, " sendpipe: "); 1227 if (arg->bundle->ncp.ipcp.cfg.sendpipe > 0) 1228 prompt_Printf(arg->prompt, "%-20ld", arg->bundle->ncp.ipcp.cfg.sendpipe); 1229 else 1230 prompt_Printf(arg->prompt, "unspecified "); 1231 prompt_Printf(arg->prompt, " recvpipe: "); 1232 if (arg->bundle->ncp.ipcp.cfg.recvpipe > 0) 1233 prompt_Printf(arg->prompt, "%ld\n", arg->bundle->ncp.ipcp.cfg.recvpipe); 1234 else 1235 prompt_Printf(arg->prompt, "unspecified\n"); 1236 1237 prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s", 1238 optval(arg->bundle, OPT_SROUTES)); 1239 prompt_Printf(arg->prompt, " Filter Decap: %s\n", 1240 optval(arg->bundle, OPT_FILTERDECAP)); 1241 prompt_Printf(arg->prompt, " ID check: %-20.20s", 1242 optval(arg->bundle, OPT_IDCHECK)); 1243 prompt_Printf(arg->prompt, " Keep-Session: %s\n", 1244 optval(arg->bundle, OPT_KEEPSESSION)); 1245 prompt_Printf(arg->prompt, " Loopback: %-20.20s", 1246 optval(arg->bundle, OPT_LOOPBACK)); 1247 prompt_Printf(arg->prompt, " PasswdAuth: %s\n", 1248 optval(arg->bundle, OPT_PASSWDAUTH)); 1249 prompt_Printf(arg->prompt, " Proxy: %-20.20s", 1250 optval(arg->bundle, OPT_PROXY)); 1251 prompt_Printf(arg->prompt, " Proxyall: %s\n", 1252 optval(arg->bundle, OPT_PROXYALL)); 1253 prompt_Printf(arg->prompt, " TCPMSS Fixup: %-20.20s", 1254 optval(arg->bundle, OPT_TCPMSSFIXUP)); 1255 prompt_Printf(arg->prompt, " Throughput: %s\n", 1256 optval(arg->bundle, OPT_THROUGHPUT)); 1257 prompt_Printf(arg->prompt, " Utmp Logging: %-20.20s", 1258 optval(arg->bundle, OPT_UTMP)); 1259 prompt_Printf(arg->prompt, " Iface-Alias: %s\n", 1260 optval(arg->bundle, OPT_IFACEALIAS)); 1261 1262 return 0; 1263 } 1264 1265 static void 1266 bundle_IdleTimeout(void *v) 1267 { 1268 struct bundle *bundle = (struct bundle *)v; 1269 1270 log_Printf(LogPHASE, "Idle timer expired\n"); 1271 bundle_StopIdleTimer(bundle); 1272 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1273 } 1274 1275 /* 1276 * Start Idle timer. If timeout is reached, we call bundle_Close() to 1277 * close LCP and link. 1278 */ 1279 void 1280 bundle_StartIdleTimer(struct bundle *bundle, unsigned secs) 1281 { 1282 timer_Stop(&bundle->idle.timer); 1283 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1284 bundle->phys_type.open && bundle->cfg.idle.timeout) { 1285 time_t now = time(NULL); 1286 1287 if (secs == 0) 1288 secs = bundle->cfg.idle.timeout; 1289 1290 /* We want at least `secs' */ 1291 if (bundle->cfg.idle.min_timeout > secs && bundle->upat) { 1292 int up = now - bundle->upat; 1293 1294 if ((long long)bundle->cfg.idle.min_timeout - up > (long long)secs) 1295 /* Only increase from the current `remaining' value */ 1296 secs = bundle->cfg.idle.min_timeout - up; 1297 } 1298 bundle->idle.timer.func = bundle_IdleTimeout; 1299 bundle->idle.timer.name = "idle"; 1300 bundle->idle.timer.load = secs * SECTICKS; 1301 bundle->idle.timer.arg = bundle; 1302 timer_Start(&bundle->idle.timer); 1303 bundle->idle.done = now + secs; 1304 } 1305 } 1306 1307 void 1308 bundle_SetIdleTimer(struct bundle *bundle, int timeout, int min_timeout) 1309 { 1310 bundle->cfg.idle.timeout = timeout; 1311 if (min_timeout >= 0) 1312 bundle->cfg.idle.min_timeout = min_timeout; 1313 if (bundle_LinkIsUp(bundle)) 1314 bundle_StartIdleTimer(bundle, 0); 1315 } 1316 1317 void 1318 bundle_StopIdleTimer(struct bundle *bundle) 1319 { 1320 timer_Stop(&bundle->idle.timer); 1321 bundle->idle.done = 0; 1322 } 1323 1324 static int 1325 bundle_RemainingIdleTime(struct bundle *bundle) 1326 { 1327 if (bundle->idle.done) 1328 return bundle->idle.done - time(NULL); 1329 return -1; 1330 } 1331 1332 int 1333 bundle_IsDead(struct bundle *bundle) 1334 { 1335 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp); 1336 } 1337 1338 static struct datalink * 1339 bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl) 1340 { 1341 struct datalink **dlp; 1342 1343 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next) 1344 if (*dlp == dl) { 1345 *dlp = dl->next; 1346 dl->next = NULL; 1347 bundle_LinksRemoved(bundle); 1348 return dl; 1349 } 1350 1351 return NULL; 1352 } 1353 1354 static void 1355 bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl) 1356 { 1357 struct datalink **dlp = &bundle->links; 1358 1359 while (*dlp) 1360 dlp = &(*dlp)->next; 1361 1362 *dlp = dl; 1363 dl->next = NULL; 1364 1365 bundle_LinkAdded(bundle, dl); 1366 mp_CheckAutoloadTimer(&bundle->ncp.mp); 1367 } 1368 1369 void 1370 bundle_CleanDatalinks(struct bundle *bundle) 1371 { 1372 struct datalink **dlp = &bundle->links; 1373 int found = 0; 1374 1375 while (*dlp) 1376 if ((*dlp)->state == DATALINK_CLOSED && 1377 (*dlp)->physical->type & 1378 (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) { 1379 *dlp = datalink_Destroy(*dlp); 1380 found++; 1381 } else 1382 dlp = &(*dlp)->next; 1383 1384 if (found) 1385 bundle_LinksRemoved(bundle); 1386 } 1387 1388 int 1389 bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl, 1390 const char *name) 1391 { 1392 if (bundle2datalink(bundle, name)) { 1393 log_Printf(LogWARN, "Clone: %s: name already exists\n", name); 1394 return 0; 1395 } 1396 1397 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name)); 1398 return 1; 1399 } 1400 1401 void 1402 bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl) 1403 { 1404 dl = bundle_DatalinkLinkout(bundle, dl); 1405 if (dl) 1406 datalink_Destroy(dl); 1407 } 1408 1409 void 1410 bundle_SetLabel(struct bundle *bundle, const char *label) 1411 { 1412 if (label) 1413 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1); 1414 else 1415 *bundle->cfg.label = '\0'; 1416 } 1417 1418 const char * 1419 bundle_GetLabel(struct bundle *bundle) 1420 { 1421 return *bundle->cfg.label ? bundle->cfg.label : NULL; 1422 } 1423 1424 int 1425 bundle_LinkSize() 1426 { 1427 struct iovec iov[SCATTER_SEGMENTS]; 1428 int niov, expect, f; 1429 1430 iov[0].iov_len = strlen(Version) + 1; 1431 iov[0].iov_base = NULL; 1432 niov = 1; 1433 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1434 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1435 return 0; 1436 } 1437 1438 for (f = expect = 0; f < niov; f++) 1439 expect += iov[f].iov_len; 1440 1441 return expect; 1442 } 1443 1444 void 1445 bundle_ReceiveDatalink(struct bundle *bundle, int s) 1446 { 1447 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1448 int niov, expect, f, *fd, nfd, onfd, got; 1449 struct iovec iov[SCATTER_SEGMENTS]; 1450 struct cmsghdr *cmsg; 1451 struct msghdr msg; 1452 struct datalink *dl; 1453 pid_t pid; 1454 1455 log_Printf(LogPHASE, "Receiving datalink\n"); 1456 1457 /* 1458 * Create our scatter/gather array - passing NULL gets the space 1459 * allocation requirement rather than actually flattening the 1460 * structures. 1461 */ 1462 iov[0].iov_len = strlen(Version) + 1; 1463 iov[0].iov_base = NULL; 1464 niov = 1; 1465 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) { 1466 log_Printf(LogERROR, "Cannot determine space required for link\n"); 1467 return; 1468 } 1469 1470 /* Allocate the scatter/gather array for recvmsg() */ 1471 for (f = expect = 0; f < niov; f++) { 1472 if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) { 1473 log_Printf(LogERROR, "Cannot allocate space to receive link\n"); 1474 return; 1475 } 1476 if (f) 1477 expect += iov[f].iov_len; 1478 } 1479 1480 /* Set up our message */ 1481 cmsg = (struct cmsghdr *)cmsgbuf; 1482 cmsg->cmsg_len = sizeof cmsgbuf; 1483 cmsg->cmsg_level = SOL_SOCKET; 1484 cmsg->cmsg_type = 0; 1485 1486 memset(&msg, '\0', sizeof msg); 1487 msg.msg_name = NULL; 1488 msg.msg_namelen = 0; 1489 msg.msg_iov = iov; 1490 msg.msg_iovlen = 1; /* Only send the version at the first pass */ 1491 msg.msg_control = cmsgbuf; 1492 msg.msg_controllen = sizeof cmsgbuf; 1493 1494 log_Printf(LogDEBUG, "Expecting %u scatter/gather bytes\n", 1495 (unsigned)iov[0].iov_len); 1496 1497 if ((got = recvmsg(s, &msg, MSG_WAITALL)) != iov[0].iov_len) { 1498 if (got == -1) 1499 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); 1500 else 1501 log_Printf(LogERROR, "Failed recvmsg: Got %d, not %u\n", 1502 got, (unsigned)iov[0].iov_len); 1503 while (niov--) 1504 free(iov[niov].iov_base); 1505 return; 1506 } 1507 1508 if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { 1509 log_Printf(LogERROR, "Recvmsg: no descriptors received !\n"); 1510 while (niov--) 1511 free(iov[niov].iov_base); 1512 return; 1513 } 1514 1515 fd = (int *)(cmsg + 1); 1516 nfd = (cmsg->cmsg_len - sizeof *cmsg) / sizeof(int); 1517 1518 if (nfd < 2) { 1519 log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n", 1520 nfd, nfd == 1 ? "" : "s"); 1521 while (nfd--) 1522 close(fd[nfd]); 1523 while (niov--) 1524 free(iov[niov].iov_base); 1525 return; 1526 } 1527 1528 /* 1529 * We've successfully received two or more open file descriptors 1530 * through our socket, plus a version string. Make sure it's the 1531 * correct version, and drop the connection if it's not. 1532 */ 1533 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) { 1534 log_Printf(LogWARN, "Cannot receive datalink, incorrect version" 1535 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len, 1536 (char *)iov[0].iov_base, Version); 1537 while (nfd--) 1538 close(fd[nfd]); 1539 while (niov--) 1540 free(iov[niov].iov_base); 1541 return; 1542 } 1543 1544 /* 1545 * Everything looks good. Send the other side our process id so that 1546 * they can transfer lock ownership, and wait for them to send the 1547 * actual link data. 1548 */ 1549 pid = getpid(); 1550 if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) { 1551 if (got == -1) 1552 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1553 else 1554 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, 1555 (int)(sizeof pid)); 1556 while (nfd--) 1557 close(fd[nfd]); 1558 while (niov--) 1559 free(iov[niov].iov_base); 1560 return; 1561 } 1562 1563 if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) { 1564 if (got == -1) 1565 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno)); 1566 else 1567 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, expect); 1568 while (nfd--) 1569 close(fd[nfd]); 1570 while (niov--) 1571 free(iov[niov].iov_base); 1572 return; 1573 } 1574 close(fd[1]); 1575 1576 onfd = nfd; /* We've got this many in our array */ 1577 nfd -= 2; /* Don't include p->fd and our reply descriptor */ 1578 niov = 1; /* Skip the version id */ 1579 dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, fd[0], 1580 fd + 2, &nfd); 1581 if (dl) { 1582 1583 if (nfd) { 1584 log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d " 1585 "auxiliary file descriptors (%d remain)\n", onfd, nfd); 1586 datalink_Destroy(dl); 1587 while (nfd--) 1588 close(fd[onfd--]); 1589 close(fd[0]); 1590 } else { 1591 bundle_DatalinkLinkin(bundle, dl); 1592 datalink_AuthOk(dl); 1593 bundle_CalculateBandwidth(dl->bundle); 1594 } 1595 } else { 1596 while (nfd--) 1597 close(fd[onfd--]); 1598 close(fd[0]); 1599 close(fd[1]); 1600 } 1601 1602 free(iov[0].iov_base); 1603 } 1604 1605 void 1606 bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun) 1607 { 1608 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD]; 1609 const char *constlock; 1610 char *lock; 1611 struct cmsghdr *cmsg; 1612 struct msghdr msg; 1613 struct iovec iov[SCATTER_SEGMENTS]; 1614 int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2], got; 1615 pid_t newpid; 1616 1617 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name); 1618 1619 /* Record the base device name for a lock transfer later */ 1620 constlock = physical_LockedDevice(dl->physical); 1621 if (constlock) { 1622 lock = alloca(strlen(constlock) + 1); 1623 strcpy(lock, constlock); 1624 } else 1625 lock = NULL; 1626 1627 bundle_LinkClosed(dl->bundle, dl); 1628 bundle_DatalinkLinkout(dl->bundle, dl); 1629 1630 /* Build our scatter/gather array */ 1631 iov[0].iov_len = strlen(Version) + 1; 1632 iov[0].iov_base = strdup(Version); 1633 niov = 1; 1634 nfd = 0; 1635 1636 fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd); 1637 1638 if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) { 1639 /* 1640 * fd[1] is used to get the peer process id back, then to confirm that 1641 * we've transferred any device locks to that process id. 1642 */ 1643 fd[1] = reply[1]; 1644 1645 nfd += 2; /* Include fd[0] and fd[1] */ 1646 memset(&msg, '\0', sizeof msg); 1647 1648 msg.msg_name = NULL; 1649 msg.msg_namelen = 0; 1650 /* 1651 * Only send the version to start... We used to send the whole lot, but 1652 * this caused problems with our RECVBUF size as a single link is about 1653 * 22k ! This way, we should bump into no limits. 1654 */ 1655 msg.msg_iovlen = 1; 1656 msg.msg_iov = iov; 1657 msg.msg_control = cmsgbuf; 1658 msg.msg_controllen = sizeof *cmsg + sizeof(int) * nfd; 1659 msg.msg_flags = 0; 1660 1661 cmsg = (struct cmsghdr *)cmsgbuf; 1662 cmsg->cmsg_len = msg.msg_controllen; 1663 cmsg->cmsg_level = SOL_SOCKET; 1664 cmsg->cmsg_type = SCM_RIGHTS; 1665 1666 for (f = 0; f < nfd; f++) 1667 *((int *)(cmsg + 1) + f) = fd[f]; 1668 1669 for (f = 1, expect = 0; f < niov; f++) 1670 expect += iov[f].iov_len; 1671 1672 if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1) 1673 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1674 strerror(errno)); 1675 if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1) 1676 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect, 1677 strerror(errno)); 1678 1679 log_Printf(LogDEBUG, "Sending %d descriptor%s and %u bytes in scatter" 1680 "/gather array\n", nfd, nfd == 1 ? "" : "s", 1681 (unsigned)iov[0].iov_len); 1682 1683 if ((got = sendmsg(s, &msg, 0)) == -1) 1684 log_Printf(LogERROR, "Failed sendmsg: %s: %s\n", 1685 sun->sun_path, strerror(errno)); 1686 else if (got != iov[0].iov_len) 1687 log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %d of %u\n", 1688 sun->sun_path, got, (unsigned)iov[0].iov_len); 1689 else { 1690 /* We must get the ACK before closing the descriptor ! */ 1691 int res; 1692 1693 if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) { 1694 log_Printf(LogDEBUG, "Received confirmation from pid %d\n", 1695 (int)newpid); 1696 if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK) 1697 log_Printf(LogERROR, "uu_lock_txfr: %s\n", uu_lockerr(res)); 1698 1699 log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect); 1700 if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) { 1701 if (got == -1) 1702 log_Printf(LogERROR, "%s: Failed writev: %s\n", 1703 sun->sun_path, strerror(errno)); 1704 else 1705 log_Printf(LogERROR, "%s: Failed writev: Wrote %d of %d\n", 1706 sun->sun_path, got, expect); 1707 } 1708 } else if (got == -1) 1709 log_Printf(LogERROR, "%s: Failed socketpair read: %s\n", 1710 sun->sun_path, strerror(errno)); 1711 else 1712 log_Printf(LogERROR, "%s: Failed socketpair read: Got %d of %d\n", 1713 sun->sun_path, got, (int)(sizeof newpid)); 1714 } 1715 1716 close(reply[0]); 1717 close(reply[1]); 1718 1719 newsid = Enabled(dl->bundle, OPT_KEEPSESSION) || 1720 tcgetpgrp(fd[0]) == getpgrp(); 1721 while (nfd) 1722 close(fd[--nfd]); 1723 if (newsid) 1724 bundle_setsid(dl->bundle, got != -1); 1725 } 1726 close(s); 1727 1728 while (niov--) 1729 free(iov[niov].iov_base); 1730 } 1731 1732 int 1733 bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl, 1734 const char *name) 1735 { 1736 struct datalink *dl; 1737 1738 if (!strcasecmp(ndl->name, name)) 1739 return 1; 1740 1741 for (dl = bundle->links; dl; dl = dl->next) 1742 if (!strcasecmp(dl->name, name)) 1743 return 0; 1744 1745 datalink_Rename(ndl, name); 1746 return 1; 1747 } 1748 1749 int 1750 bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode) 1751 { 1752 int omode; 1753 1754 omode = dl->physical->type; 1755 if (omode == mode) 1756 return 1; 1757 1758 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO)) 1759 /* First auto link */ 1760 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) { 1761 log_Printf(LogWARN, "You must `set ifaddr' or `open' before" 1762 " changing mode to %s\n", mode2Nam(mode)); 1763 return 0; 1764 } 1765 1766 if (!datalink_SetMode(dl, mode)) 1767 return 0; 1768 1769 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) && 1770 bundle->phase != PHASE_NETWORK) 1771 /* First auto link, we need an interface */ 1772 ipcp_InterfaceUp(&bundle->ncp.ipcp); 1773 1774 /* Regenerate phys_type and adjust idle timer */ 1775 bundle_LinksRemoved(bundle); 1776 1777 return 1; 1778 } 1779 1780 void 1781 bundle_setsid(struct bundle *bundle, int holdsession) 1782 { 1783 /* 1784 * Lose the current session. This means getting rid of our pid 1785 * too so that the tty device will really go away, and any getty 1786 * etc will be allowed to restart. 1787 */ 1788 pid_t pid, orig; 1789 int fds[2]; 1790 char done; 1791 struct datalink *dl; 1792 1793 if (!holdsession && bundle_IsDead(bundle)) { 1794 /* 1795 * No need to lose our session after all... we're going away anyway 1796 * 1797 * We should really stop the timer and pause if holdsession is set and 1798 * the bundle's dead, but that leaves other resources lying about :-( 1799 */ 1800 return; 1801 } 1802 1803 orig = getpid(); 1804 if (pipe(fds) == -1) { 1805 log_Printf(LogERROR, "pipe: %s\n", strerror(errno)); 1806 return; 1807 } 1808 switch ((pid = fork())) { 1809 case -1: 1810 log_Printf(LogERROR, "fork: %s\n", strerror(errno)); 1811 close(fds[0]); 1812 close(fds[1]); 1813 return; 1814 case 0: 1815 close(fds[1]); 1816 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1817 close(fds[0]); 1818 if (pipe(fds) == -1) { 1819 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno)); 1820 return; 1821 } 1822 switch ((pid = fork())) { 1823 case -1: 1824 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno)); 1825 close(fds[0]); 1826 close(fds[1]); 1827 return; 1828 case 0: 1829 close(fds[1]); 1830 bundle_LockTun(bundle); /* update pid */ 1831 read(fds[0], &done, 1); /* uu_locks are mine ! */ 1832 close(fds[0]); 1833 setsid(); 1834 bundle_ChangedPID(bundle); 1835 log_Printf(LogDEBUG, "%d -> %d: %s session control\n", 1836 (int)orig, (int)getpid(), 1837 holdsession ? "Passed" : "Dropped"); 1838 timer_InitService(0); /* Start the Timer Service */ 1839 break; 1840 default: 1841 close(fds[0]); 1842 /* Give away all our physical locks (to the final process) */ 1843 for (dl = bundle->links; dl; dl = dl->next) 1844 if (dl->state != DATALINK_CLOSED) 1845 physical_ChangedPid(dl->physical, pid); 1846 write(fds[1], "!", 1); /* done */ 1847 close(fds[1]); 1848 _exit(0); 1849 break; 1850 } 1851 break; 1852 default: 1853 close(fds[0]); 1854 /* Give away all our physical locks (to the intermediate process) */ 1855 for (dl = bundle->links; dl; dl = dl->next) 1856 if (dl->state != DATALINK_CLOSED) 1857 physical_ChangedPid(dl->physical, pid); 1858 write(fds[1], "!", 1); /* done */ 1859 close(fds[1]); 1860 if (holdsession) { 1861 int fd, status; 1862 1863 timer_TermService(); 1864 signal(SIGPIPE, SIG_DFL); 1865 signal(SIGALRM, SIG_DFL); 1866 signal(SIGHUP, SIG_DFL); 1867 signal(SIGTERM, SIG_DFL); 1868 signal(SIGINT, SIG_DFL); 1869 signal(SIGQUIT, SIG_DFL); 1870 for (fd = getdtablesize(); fd >= 0; fd--) 1871 close(fd); 1872 /* 1873 * Reap the intermediate process. As we're not exiting but the 1874 * intermediate is, we don't want it to become defunct. 1875 */ 1876 waitpid(pid, &status, 0); 1877 /* Tweak our process arguments.... */ 1878 SetTitle("session owner"); 1879 #ifndef NOSUID 1880 setuid(ID0realuid()); 1881 #endif 1882 /* 1883 * Hang around for a HUP. This should happen as soon as the 1884 * ppp that we passed our ctty descriptor to closes it. 1885 * NOTE: If this process dies, the passed descriptor becomes 1886 * invalid and will give a select() error by setting one 1887 * of the error fds, aborting the other ppp. We don't 1888 * want that to happen ! 1889 */ 1890 pause(); 1891 } 1892 _exit(0); 1893 break; 1894 } 1895 } 1896 1897 int 1898 bundle_HighestState(struct bundle *bundle) 1899 { 1900 struct datalink *dl; 1901 int result = DATALINK_CLOSED; 1902 1903 for (dl = bundle->links; dl; dl = dl->next) 1904 if (result < dl->state) 1905 result = dl->state; 1906 1907 return result; 1908 } 1909 1910 int 1911 bundle_Exception(struct bundle *bundle, int fd) 1912 { 1913 struct datalink *dl; 1914 1915 for (dl = bundle->links; dl; dl = dl->next) 1916 if (dl->physical->fd == fd) { 1917 datalink_Down(dl, CLOSE_NORMAL); 1918 return 1; 1919 } 1920 1921 return 0; 1922 } 1923 1924 void 1925 bundle_AdjustFilters(struct bundle *bundle, struct in_addr *my_ip, 1926 struct in_addr *peer_ip) 1927 { 1928 filter_AdjustAddr(&bundle->filter.in, my_ip, peer_ip, NULL); 1929 filter_AdjustAddr(&bundle->filter.out, my_ip, peer_ip, NULL); 1930 filter_AdjustAddr(&bundle->filter.dial, my_ip, peer_ip, NULL); 1931 filter_AdjustAddr(&bundle->filter.alive, my_ip, peer_ip, NULL); 1932 } 1933 1934 void 1935 bundle_AdjustDNS(struct bundle *bundle, struct in_addr dns[2]) 1936 { 1937 filter_AdjustAddr(&bundle->filter.in, NULL, NULL, dns); 1938 filter_AdjustAddr(&bundle->filter.out, NULL, NULL, dns); 1939 filter_AdjustAddr(&bundle->filter.dial, NULL, NULL, dns); 1940 filter_AdjustAddr(&bundle->filter.alive, NULL, NULL, dns); 1941 } 1942 1943 void 1944 bundle_CalculateBandwidth(struct bundle *bundle) 1945 { 1946 struct datalink *dl; 1947 int sp; 1948 1949 bundle->bandwidth = 0; 1950 bundle->mtu = 0; 1951 for (dl = bundle->links; dl; dl = dl->next) 1952 if (dl->state == DATALINK_OPEN) { 1953 if ((sp = dl->mp.bandwidth) == 0 && 1954 (sp = physical_GetSpeed(dl->physical)) == 0) 1955 log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n", 1956 dl->name, dl->physical->name.full); 1957 else 1958 bundle->bandwidth += sp; 1959 if (!bundle->ncp.mp.active) { 1960 bundle->mtu = dl->physical->link.lcp.his_mru; 1961 break; 1962 } 1963 } 1964 1965 if(bundle->bandwidth == 0) 1966 bundle->bandwidth = 115200; /* Shrug */ 1967 1968 if (bundle->ncp.mp.active) 1969 bundle->mtu = bundle->ncp.mp.peer_mrru; 1970 else if (!bundle->mtu) 1971 bundle->mtu = 1500; 1972 1973 #ifndef NORADIUS 1974 if (bundle->radius.valid && bundle->radius.mtu && 1975 bundle->radius.mtu < bundle->mtu) { 1976 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n", 1977 bundle->radius.mtu); 1978 bundle->mtu = bundle->radius.mtu; 1979 } 1980 #endif 1981 1982 tun_configure(bundle); 1983 } 1984 1985 void 1986 bundle_AutoAdjust(struct bundle *bundle, int percent, int what) 1987 { 1988 struct datalink *dl, *choice, *otherlinkup; 1989 1990 choice = otherlinkup = NULL; 1991 for (dl = bundle->links; dl; dl = dl->next) 1992 if (dl->physical->type == PHYS_AUTO) { 1993 if (dl->state == DATALINK_OPEN) { 1994 if (what == AUTO_DOWN) { 1995 if (choice) 1996 otherlinkup = choice; 1997 choice = dl; 1998 } 1999 } else if (dl->state == DATALINK_CLOSED) { 2000 if (what == AUTO_UP) { 2001 choice = dl; 2002 break; 2003 } 2004 } else { 2005 /* An auto link in an intermediate state - forget it for the moment */ 2006 choice = NULL; 2007 break; 2008 } 2009 } else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN) 2010 otherlinkup = dl; 2011 2012 if (choice) { 2013 if (what == AUTO_UP) { 2014 log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n", 2015 percent, choice->name); 2016 datalink_Up(choice, 1, 1); 2017 mp_CheckAutoloadTimer(&bundle->ncp.mp); 2018 } else if (otherlinkup) { /* Only bring the second-last link down */ 2019 log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n", 2020 percent, choice->name); 2021 datalink_Close(choice, CLOSE_STAYDOWN); 2022 mp_CheckAutoloadTimer(&bundle->ncp.mp); 2023 } 2024 } 2025 } 2026 2027 int 2028 bundle_WantAutoloadTimer(struct bundle *bundle) 2029 { 2030 struct datalink *dl; 2031 int autolink, opened; 2032 2033 if (bundle->phase == PHASE_NETWORK) { 2034 for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next) 2035 if (dl->physical->type == PHYS_AUTO) { 2036 if (++autolink == 2 || (autolink == 1 && opened)) 2037 /* Two auto links or one auto and one open in NETWORK phase */ 2038 return 1; 2039 } else if (dl->state == DATALINK_OPEN) { 2040 opened++; 2041 if (autolink) 2042 /* One auto and one open link in NETWORK phase */ 2043 return 1; 2044 } 2045 } 2046 2047 return 0; 2048 } 2049 2050 void 2051 bundle_ChangedPID(struct bundle *bundle) 2052 { 2053 #ifdef TUNSIFPID 2054 ioctl(bundle->dev.fd, TUNSIFPID, 0); 2055 #endif 2056 } 2057