bundle.c revision 42321
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 * $Id: bundle.c,v 1.42 1998/12/14 19:24:28 brian Exp $ 27 */ 28 29#include <sys/param.h> 30#include <sys/socket.h> 31#include <netinet/in.h> 32#include <net/if.h> 33#include <arpa/inet.h> 34#include <net/route.h> 35#include <net/if_dl.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#include <paths.h> 43#include <stdio.h> 44#include <stdlib.h> 45#include <string.h> 46#include <sys/ioctl.h> 47#include <sys/uio.h> 48#include <sys/wait.h> 49#include <termios.h> 50#include <unistd.h> 51 52#ifndef NOALIAS 53#ifdef __OpenBSD__ 54#include "alias.h" 55#else 56#include <alias.h> 57#endif 58#endif 59#include "defs.h" 60#include "command.h" 61#include "mbuf.h" 62#include "log.h" 63#include "id.h" 64#include "timer.h" 65#include "fsm.h" 66#include "iplist.h" 67#include "lqr.h" 68#include "hdlc.h" 69#include "throughput.h" 70#include "slcompress.h" 71#include "ipcp.h" 72#include "filter.h" 73#include "descriptor.h" 74#include "route.h" 75#include "lcp.h" 76#include "ccp.h" 77#include "link.h" 78#include "mp.h" 79#include "bundle.h" 80#include "async.h" 81#include "physical.h" 82#include "modem.h" 83#include "auth.h" 84#include "lcpproto.h" 85#include "chap.h" 86#include "tun.h" 87#include "prompt.h" 88#include "chat.h" 89#include "cbcp.h" 90#include "datalink.h" 91#include "ip.h" 92#include "iface.h" 93 94#define SCATTER_SEGMENTS 4 /* version, datalink, name, physical */ 95#define SOCKET_OVERHEAD 100 /* additional buffer space for large */ 96 /* {recv,send}msg() calls */ 97 98static int bundle_RemainingIdleTime(struct bundle *); 99static int bundle_RemainingAutoLoadTime(struct bundle *); 100 101static const char *PhaseNames[] = { 102 "Dead", "Establish", "Authenticate", "Network", "Terminate" 103}; 104 105const char * 106bundle_PhaseName(struct bundle *bundle) 107{ 108 return bundle->phase <= PHASE_TERMINATE ? 109 PhaseNames[bundle->phase] : "unknown"; 110} 111 112void 113bundle_NewPhase(struct bundle *bundle, u_int new) 114{ 115 if (new == bundle->phase) 116 return; 117 118 if (new <= PHASE_TERMINATE) 119 log_Printf(LogPHASE, "bundle: %s\n", PhaseNames[new]); 120 121 switch (new) { 122 case PHASE_DEAD: 123 log_DisplayPrompts(); 124 bundle->phase = new; 125 break; 126 127 case PHASE_ESTABLISH: 128 bundle->phase = new; 129 break; 130 131 case PHASE_AUTHENTICATE: 132 bundle->phase = new; 133 log_DisplayPrompts(); 134 break; 135 136 case PHASE_NETWORK: 137 ipcp_Setup(&bundle->ncp.ipcp); 138 fsm_Up(&bundle->ncp.ipcp.fsm); 139 fsm_Open(&bundle->ncp.ipcp.fsm); 140 bundle->phase = new; 141 log_DisplayPrompts(); 142 break; 143 144 case PHASE_TERMINATE: 145 bundle->phase = new; 146 mp_Down(&bundle->ncp.mp); 147 log_DisplayPrompts(); 148 break; 149 } 150} 151 152static void 153bundle_LayerStart(void *v, struct fsm *fp) 154{ 155 /* The given FSM is about to start up ! */ 156} 157 158 159static void 160bundle_Notify(struct bundle *bundle, char c) 161{ 162 if (bundle->notify.fd != -1) { 163 if (write(bundle->notify.fd, &c, 1) == 1) 164 log_Printf(LogPHASE, "Parent notified of success.\n"); 165 else 166 log_Printf(LogPHASE, "Failed to notify parent of success.\n"); 167 close(bundle->notify.fd); 168 bundle->notify.fd = -1; 169 } 170} 171 172static void 173bundle_ClearQueues(void *v) 174{ 175 struct bundle *bundle = (struct bundle *)v; 176 struct datalink *dl; 177 178 log_Printf(LogPHASE, "Clearing choked output queue\n"); 179 timer_Stop(&bundle->choked.timer); 180 181 /* 182 * Emergency time: 183 * 184 * We've had a full queue for PACKET_DEL_SECS seconds without being 185 * able to get rid of any of the packets. We've probably given up 186 * on the redials at this point, and the queued data has almost 187 * definitely been timed out by the layer above. As this is preventing 188 * us from reading the TUN_NAME device (we don't want to buffer stuff 189 * indefinitely), we may as well nuke this data and start with a clean 190 * slate ! 191 * 192 * Unfortunately, this has the side effect of shafting any compression 193 * dictionaries in use (causing the relevant RESET_REQ/RESET_ACK). 194 */ 195 196 ip_DeleteQueue(&bundle->ncp.ipcp); 197 mp_DeleteQueue(&bundle->ncp.mp); 198 for (dl = bundle->links; dl; dl = dl->next) 199 physical_DeleteQueue(dl->physical); 200} 201 202static void 203bundle_AutoLoadTimeout(void *v) 204{ 205 struct bundle *bundle = (struct bundle *)v; 206 207 if (bundle->autoload.comingup) { 208 log_Printf(LogPHASE, "autoload: Another link is required\n"); 209 /* bundle_Open() stops the timer */ 210 bundle_Open(bundle, NULL, PHYS_AUTO, 0); 211 } else { 212 struct datalink *dl, *last; 213 214 timer_Stop(&bundle->autoload.timer); 215 for (last = NULL, dl = bundle->links; dl; dl = dl->next) 216 if (dl->physical->type == PHYS_AUTO && dl->state == DATALINK_OPEN) 217 last = dl; 218 219 if (last) 220 datalink_Close(last, CLOSE_STAYDOWN); 221 } 222} 223 224static void 225bundle_StartAutoLoadTimer(struct bundle *bundle, int up) 226{ 227 struct datalink *dl; 228 229 timer_Stop(&bundle->autoload.timer); 230 231 if (bundle->CleaningUp || bundle->phase != PHASE_NETWORK) { 232 dl = NULL; 233 bundle->autoload.running = 0; 234 } else if (up) { 235 for (dl = bundle->links; dl; dl = dl->next) 236 if (dl->state == DATALINK_CLOSED && dl->physical->type == PHYS_AUTO) { 237 if (bundle->cfg.autoload.max.timeout) { 238 bundle->autoload.timer.func = bundle_AutoLoadTimeout; 239 bundle->autoload.timer.name = "autoload up"; 240 bundle->autoload.timer.load = 241 bundle->cfg.autoload.max.timeout * SECTICKS; 242 bundle->autoload.timer.arg = bundle; 243 timer_Start(&bundle->autoload.timer); 244 bundle->autoload.done = time(NULL) + bundle->cfg.autoload.max.timeout; 245 } else 246 bundle_AutoLoadTimeout(bundle); 247 break; 248 } 249 bundle->autoload.running = (dl || bundle->cfg.autoload.min.timeout) ? 1 : 0; 250 } else { 251 int nlinks; 252 struct datalink *adl; 253 254 for (nlinks = 0, adl = NULL, dl = bundle->links; dl; dl = dl->next) 255 if (dl->state == DATALINK_OPEN) { 256 if (dl->physical->type == PHYS_AUTO) 257 adl = dl; 258 if (++nlinks > 1 && adl) { 259 if (bundle->cfg.autoload.min.timeout) { 260 bundle->autoload.timer.func = bundle_AutoLoadTimeout; 261 bundle->autoload.timer.name = "autoload down"; 262 bundle->autoload.timer.load = 263 bundle->cfg.autoload.min.timeout * SECTICKS; 264 bundle->autoload.timer.arg = bundle; 265 timer_Start(&bundle->autoload.timer); 266 bundle->autoload.done = 267 time(NULL) + bundle->cfg.autoload.min.timeout; 268 } 269 break; 270 } 271 } 272 273 bundle->autoload.running = 1; 274 } 275 276 bundle->autoload.comingup = up ? 1 : 0; 277} 278 279static void 280bundle_StopAutoLoadTimer(struct bundle *bundle) 281{ 282 timer_Stop(&bundle->autoload.timer); 283 bundle->autoload.done = 0; 284} 285 286static int 287bundle_RemainingAutoLoadTime(struct bundle *bundle) 288{ 289 if (bundle->autoload.done) 290 return bundle->autoload.done - time(NULL); 291 return -1; 292} 293 294static void 295bundle_LinkAdded(struct bundle *bundle, struct datalink *dl) 296{ 297 bundle->phys_type.all |= dl->physical->type; 298 if (dl->state == DATALINK_OPEN) 299 bundle->phys_type.open |= dl->physical->type; 300 301 /* Note: We only re-add links that are DATALINK_OPEN */ 302 if (dl->physical->type == PHYS_AUTO && 303 bundle->autoload.timer.state == TIMER_STOPPED && 304 dl->state != DATALINK_OPEN && 305 bundle->phase == PHASE_NETWORK) 306 bundle->autoload.running = 1; 307 308 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 309 != bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED) 310 /* We may need to start our idle timer */ 311 bundle_StartIdleTimer(bundle); 312} 313 314void 315bundle_LinksRemoved(struct bundle *bundle) 316{ 317 struct datalink *dl; 318 319 bundle->phys_type.all = bundle->phys_type.open = 0; 320 for (dl = bundle->links; dl; dl = dl->next) 321 bundle_LinkAdded(bundle, dl); 322 323 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) 324 == bundle->phys_type.open) 325 bundle_StopIdleTimer(bundle); 326} 327 328static void 329bundle_LayerUp(void *v, struct fsm *fp) 330{ 331 /* 332 * The given fsm is now up 333 * If it's an LCP, adjust our phys_mode.open value. 334 * If it's an LCP set our mtu (if we're multilink, add up the link 335 * speeds and set the MRRU) and start our autoload timer. 336 * If it's an NCP, tell our -background parent to go away. 337 * If it's the first NCP, start the idle timer. 338 */ 339 struct bundle *bundle = (struct bundle *)v; 340 341 if (fp->proto == PROTO_LCP) { 342 struct physical *p = link2physical(fp->link); 343 344 bundle_LinkAdded(bundle, p->dl); 345 if (bundle->ncp.mp.active) { 346 struct datalink *dl; 347 348 bundle->ifSpeed = 0; 349 for (dl = bundle->links; dl; dl = dl->next) 350 if (dl->state == DATALINK_OPEN) 351 bundle->ifSpeed += modem_Speed(dl->physical); 352 tun_configure(bundle, bundle->ncp.mp.peer_mrru); 353 bundle->autoload.running = 1; 354 } else { 355 bundle->ifSpeed = modem_Speed(p); 356 tun_configure(bundle, fsm2lcp(fp)->his_mru); 357 } 358 } else if (fp->proto == PROTO_IPCP) { 359 bundle_StartIdleTimer(bundle); 360 bundle_Notify(bundle, EX_NORMAL); 361 } 362} 363 364static void 365bundle_LayerDown(void *v, struct fsm *fp) 366{ 367 /* 368 * The given FSM has been told to come down. 369 * If it's our last NCP, stop the idle timer. 370 * If it's an LCP, adjust our phys_type.open value and any timers. 371 * If it's an LCP and we're in multilink mode, adjust our tun 372 * speed and make sure our minimum sequence number is adjusted. 373 */ 374 375 struct bundle *bundle = (struct bundle *)v; 376 377 if (fp->proto == PROTO_IPCP) 378 bundle_StopIdleTimer(bundle); 379 else if (fp->proto == PROTO_LCP) { 380 bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */ 381 if (bundle->ncp.mp.active) { 382 struct datalink *dl; 383 struct datalink *lost; 384 385 bundle->ifSpeed = 0; 386 lost = NULL; 387 for (dl = bundle->links; dl; dl = dl->next) 388 if (fp == &dl->physical->link.lcp.fsm) 389 lost = dl; 390 else if (dl->state == DATALINK_OPEN) 391 bundle->ifSpeed += modem_Speed(dl->physical); 392 393 if (bundle->ifSpeed) 394 /* Don't configure down to a speed of 0 */ 395 tun_configure(bundle, bundle->ncp.mp.link.lcp.his_mru); 396 397 if (lost) 398 mp_LinkLost(&bundle->ncp.mp, lost); 399 else 400 log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n", 401 fp->link->name); 402 } 403 } 404} 405 406static void 407bundle_LayerFinish(void *v, struct fsm *fp) 408{ 409 /* The given fsm is now down (fp cannot be NULL) 410 * 411 * If it's the last LCP, fsm_Down all NCPs 412 * If it's the last NCP, fsm_Close all LCPs 413 */ 414 415 struct bundle *bundle = (struct bundle *)v; 416 struct datalink *dl; 417 418 if (fp->proto == PROTO_IPCP) { 419 if (bundle_Phase(bundle) != PHASE_DEAD) 420 bundle_NewPhase(bundle, PHASE_TERMINATE); 421 for (dl = bundle->links; dl; dl = dl->next) 422 datalink_Close(dl, CLOSE_NORMAL); 423 fsm2initial(fp); 424 } else if (fp->proto == PROTO_LCP) { 425 int others_active; 426 427 others_active = 0; 428 for (dl = bundle->links; dl; dl = dl->next) 429 if (fp != &dl->physical->link.lcp.fsm && 430 dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 431 others_active++; 432 433 if (!others_active) 434 fsm2initial(&bundle->ncp.ipcp.fsm); 435 } 436} 437 438int 439bundle_LinkIsUp(const struct bundle *bundle) 440{ 441 return bundle->ncp.ipcp.fsm.state == ST_OPENED; 442} 443 444void 445bundle_Close(struct bundle *bundle, const char *name, int how) 446{ 447 /* 448 * Please close the given datalink. 449 * If name == NULL or name is the last datalink, fsm_Close all NCPs 450 * (except our MP) 451 * If it isn't the last datalink, just Close that datalink. 452 */ 453 454 struct datalink *dl, *this_dl; 455 int others_active; 456 457 others_active = 0; 458 this_dl = NULL; 459 460 for (dl = bundle->links; dl; dl = dl->next) { 461 if (name && !strcasecmp(name, dl->name)) 462 this_dl = dl; 463 if (name == NULL || this_dl == dl) { 464 switch (how) { 465 case CLOSE_LCP: 466 datalink_DontHangup(dl); 467 /* fall through */ 468 case CLOSE_STAYDOWN: 469 datalink_StayDown(dl); 470 break; 471 } 472 } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) 473 others_active++; 474 } 475 476 if (name && this_dl == NULL) { 477 log_Printf(LogWARN, "%s: Invalid datalink name\n", name); 478 return; 479 } 480 481 if (!others_active) { 482 bundle_StopIdleTimer(bundle); 483 bundle_StopAutoLoadTimer(bundle); 484 if (bundle->ncp.ipcp.fsm.state > ST_CLOSED || 485 bundle->ncp.ipcp.fsm.state == ST_STARTING) 486 fsm_Close(&bundle->ncp.ipcp.fsm); 487 else { 488 fsm2initial(&bundle->ncp.ipcp.fsm); 489 for (dl = bundle->links; dl; dl = dl->next) 490 datalink_Close(dl, how); 491 } 492 } else if (this_dl && this_dl->state != DATALINK_CLOSED && 493 this_dl->state != DATALINK_HANGUP) 494 datalink_Close(this_dl, how); 495} 496 497void 498bundle_Down(struct bundle *bundle, int how) 499{ 500 struct datalink *dl; 501 502 for (dl = bundle->links; dl; dl = dl->next) 503 datalink_Down(dl, how); 504} 505 506static int 507bundle_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 508{ 509 struct bundle *bundle = descriptor2bundle(d); 510 struct datalink *dl; 511 int result, want, queued, nlinks; 512 513 result = 0; 514 515 /* If there are aren't many packets queued, look for some more. */ 516 for (nlinks = 0, dl = bundle->links; dl; dl = dl->next) 517 nlinks++; 518 519 if (nlinks) { 520 queued = r ? bundle_FillQueues(bundle) : ip_QueueLen(&bundle->ncp.ipcp); 521 if (bundle->autoload.running) { 522 if (queued < bundle->cfg.autoload.max.packets) { 523 if (queued > bundle->cfg.autoload.min.packets) 524 bundle_StopAutoLoadTimer(bundle); 525 else if (bundle->autoload.timer.state != TIMER_RUNNING || 526 bundle->autoload.comingup) 527 bundle_StartAutoLoadTimer(bundle, 0); 528 } else if (bundle->autoload.timer.state != TIMER_RUNNING || 529 !bundle->autoload.comingup) 530 bundle_StartAutoLoadTimer(bundle, 1); 531 } 532 533 if (r && (bundle->phase == PHASE_NETWORK || 534 bundle->phys_type.all & PHYS_AUTO)) { 535 /* enough surplus so that we can tell if we're getting swamped */ 536 want = bundle->cfg.autoload.max.packets + nlinks * 2; 537 /* but at least 20 packets ! */ 538 if (want < 20) 539 want = 20; 540 if (queued < want) { 541 /* Not enough - select() for more */ 542 if (bundle->choked.timer.state == TIMER_RUNNING) 543 timer_Stop(&bundle->choked.timer); /* Not needed any more */ 544 FD_SET(bundle->dev.fd, r); 545 if (*n < bundle->dev.fd + 1) 546 *n = bundle->dev.fd + 1; 547 log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd); 548 result++; 549 } else if (bundle->choked.timer.state == TIMER_STOPPED) { 550 bundle->choked.timer.func = bundle_ClearQueues; 551 bundle->choked.timer.name = "output choke"; 552 bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS; 553 bundle->choked.timer.arg = bundle; 554 timer_Start(&bundle->choked.timer); 555 } 556 } 557 } 558 559 /* Which links need a select() ? */ 560 for (dl = bundle->links; dl; dl = dl->next) 561 result += descriptor_UpdateSet(&dl->desc, r, w, e, n); 562 563 /* 564 * This *MUST* be called after the datalink UpdateSet()s as it 565 * might be ``holding'' one of the datalinks (death-row) and 566 * wants to be able to de-select() it from the descriptor set. 567 */ 568 result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n); 569 570 return result; 571} 572 573static int 574bundle_IsSet(struct descriptor *d, const fd_set *fdset) 575{ 576 struct bundle *bundle = descriptor2bundle(d); 577 struct datalink *dl; 578 579 for (dl = bundle->links; dl; dl = dl->next) 580 if (descriptor_IsSet(&dl->desc, fdset)) 581 return 1; 582 583 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 584 return 1; 585 586 return FD_ISSET(bundle->dev.fd, fdset); 587} 588 589static void 590bundle_DescriptorRead(struct descriptor *d, struct bundle *bundle, 591 const fd_set *fdset) 592{ 593 struct datalink *dl; 594 595 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 596 descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset); 597 598 for (dl = bundle->links; dl; dl = dl->next) 599 if (descriptor_IsSet(&dl->desc, fdset)) 600 descriptor_Read(&dl->desc, bundle, fdset); 601 602 if (FD_ISSET(bundle->dev.fd, fdset)) { 603 struct tun_data tun; 604 int n, pri; 605 606 /* something to read from tun */ 607 n = read(bundle->dev.fd, &tun, sizeof tun); 608 if (n < 0) { 609 log_Printf(LogWARN, "read from %s: %s\n", TUN_NAME, strerror(errno)); 610 return; 611 } 612 n -= sizeof tun - sizeof tun.data; 613 if (n <= 0) { 614 log_Printf(LogERROR, "read from %s: Only %d bytes read ?\n", TUN_NAME, n); 615 return; 616 } 617 if (!tun_check_header(tun, AF_INET)) 618 return; 619 620 if (((struct ip *)tun.data)->ip_dst.s_addr == 621 bundle->ncp.ipcp.my_ip.s_addr) { 622 /* we've been asked to send something addressed *to* us :( */ 623 if (Enabled(bundle, OPT_LOOPBACK)) { 624 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.in); 625 if (pri >= 0) { 626 struct mbuf *bp; 627 628 bp = mbuf_Alloc(n, MB_IPIN); 629 memcpy(MBUF_CTOP(bp), tun.data, n); 630 ip_Input(bundle, bp); 631 log_Printf(LogDEBUG, "Looped back packet addressed to myself\n"); 632 } 633 return; 634 } else 635 log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n"); 636 } 637 638 /* 639 * Process on-demand dialup. Output packets are queued within tunnel 640 * device until IPCP is opened. 641 */ 642 643 if (bundle_Phase(bundle) == PHASE_DEAD) { 644 /* 645 * Note, we must be in AUTO mode :-/ otherwise our interface should 646 * *not* be UP and we can't receive data 647 */ 648 if ((pri = PacketCheck(bundle, tun.data, n, &bundle->filter.dial)) >= 0) 649 bundle_Open(bundle, NULL, PHYS_AUTO, 0); 650 else 651 /* 652 * Drop the packet. If we were to queue it, we'd just end up with 653 * a pile of timed-out data in our output queue by the time we get 654 * around to actually dialing. We'd also prematurely reach the 655 * threshold at which we stop select()ing to read() the tun 656 * device - breaking auto-dial. 657 */ 658 return; 659 } 660 661 pri = PacketCheck(bundle, tun.data, n, &bundle->filter.out); 662 if (pri >= 0) { 663#ifndef NOALIAS 664 if (bundle->AliasEnabled) { 665 PacketAliasOut(tun.data, sizeof tun.data); 666 n = ntohs(((struct ip *)tun.data)->ip_len); 667 } 668#endif 669 ip_Enqueue(&bundle->ncp.ipcp, pri, tun.data, n); 670 } 671 } 672} 673 674static int 675bundle_DescriptorWrite(struct descriptor *d, struct bundle *bundle, 676 const fd_set *fdset) 677{ 678 struct datalink *dl; 679 int result = 0; 680 681 /* This is not actually necessary as struct mpserver doesn't Write() */ 682 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) 683 descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset); 684 685 for (dl = bundle->links; dl; dl = dl->next) 686 if (descriptor_IsSet(&dl->desc, fdset)) 687 result += descriptor_Write(&dl->desc, bundle, fdset); 688 689 return result; 690} 691 692void 693bundle_LockTun(struct bundle *bundle) 694{ 695 FILE *lockfile; 696 char pidfile[MAXPATHLEN]; 697 698 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 699 lockfile = ID0fopen(pidfile, "w"); 700 if (lockfile != NULL) { 701 fprintf(lockfile, "%d\n", (int)getpid()); 702 fclose(lockfile); 703 } 704#ifndef RELEASE_CRUNCH 705 else 706 log_Printf(LogERROR, "Warning: Can't create %s: %s\n", 707 pidfile, strerror(errno)); 708#endif 709} 710 711static void 712bundle_UnlockTun(struct bundle *bundle) 713{ 714 char pidfile[MAXPATHLEN]; 715 716 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit); 717 ID0unlink(pidfile); 718} 719 720struct bundle * 721bundle_Create(const char *prefix, int type, const char **argv) 722{ 723 int s, enoentcount, err; 724 const char *ifname; 725 struct ifreq ifrq; 726 static struct bundle bundle; /* there can be only one */ 727 728 if (bundle.iface != NULL) { /* Already allocated ! */ 729 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n"); 730 return NULL; 731 } 732 733 err = ENOENT; 734 enoentcount = 0; 735 for (bundle.unit = 0; ; bundle.unit++) { 736 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d", 737 prefix, bundle.unit); 738 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR); 739 if (bundle.dev.fd >= 0) 740 break; 741 else if (errno == ENXIO) { 742 err = errno; 743 break; 744 } else if (errno == ENOENT) { 745 if (++enoentcount > 2) 746 break; 747 } else 748 err = errno; 749 } 750 751 if (bundle.dev.fd < 0) { 752 log_Printf(LogWARN, "No available tunnel devices found (%s).\n", 753 strerror(err)); 754 return NULL; 755 } 756 757 log_SetTun(bundle.unit); 758 bundle.argv = argv; 759 bundle.argv0 = argv[0]; 760 bundle.argv1 = argv[1]; 761 762 s = socket(AF_INET, SOCK_DGRAM, 0); 763 if (s < 0) { 764 log_Printf(LogERROR, "bundle_Create: socket(): %s\n", strerror(errno)); 765 close(bundle.dev.fd); 766 return NULL; 767 } 768 769 ifname = strrchr(bundle.dev.Name, '/'); 770 if (ifname == NULL) 771 ifname = bundle.dev.Name; 772 else 773 ifname++; 774 775 bundle.iface = iface_Create(ifname); 776 if (bundle.iface == NULL) { 777 close(s); 778 close(bundle.dev.fd); 779 return NULL; 780 } 781 782 /* 783 * Now, bring up the interface. 784 */ 785 memset(&ifrq, '\0', sizeof ifrq); 786 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1); 787 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0'; 788 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) { 789 log_Printf(LogERROR, "bundle_Create: ioctl(SIOCGIFFLAGS): %s\n", 790 strerror(errno)); 791 close(s); 792 iface_Destroy(bundle.iface); 793 bundle.iface = NULL; 794 close(bundle.dev.fd); 795 return NULL; 796 } 797 ifrq.ifr_flags |= IFF_UP; 798 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) { 799 log_Printf(LogERROR, "bundle_Create: ioctl(SIOCSIFFLAGS): %s\n", 800 strerror(errno)); 801 close(s); 802 iface_Destroy(bundle.iface); 803 bundle.iface = NULL; 804 close(bundle.dev.fd); 805 return NULL; 806 } 807 808 close(s); 809 810 log_Printf(LogPHASE, "Using interface: %s\n", ifname); 811 812 bundle.ifSpeed = 0; 813 814 bundle.routing_seq = 0; 815 bundle.phase = PHASE_DEAD; 816 bundle.CleaningUp = 0; 817 bundle.AliasEnabled = 0; 818 819 bundle.fsm.LayerStart = bundle_LayerStart; 820 bundle.fsm.LayerUp = bundle_LayerUp; 821 bundle.fsm.LayerDown = bundle_LayerDown; 822 bundle.fsm.LayerFinish = bundle_LayerFinish; 823 bundle.fsm.object = &bundle; 824 825 bundle.cfg.idle_timeout = NCP_IDLE_TIMEOUT; 826 *bundle.cfg.auth.name = '\0'; 827 *bundle.cfg.auth.key = '\0'; 828 bundle.cfg.opt = OPT_SROUTES | OPT_IDCHECK | OPT_LOOPBACK | 829 OPT_THROUGHPUT | OPT_UTMP; 830 *bundle.cfg.label = '\0'; 831 bundle.cfg.mtu = DEF_MTU; 832 bundle.cfg.autoload.max.packets = 0; 833 bundle.cfg.autoload.max.timeout = 0; 834 bundle.cfg.autoload.min.packets = 0; 835 bundle.cfg.autoload.min.timeout = 0; 836 bundle.cfg.choked.timeout = CHOKED_TIMEOUT; 837 bundle.phys_type.all = type; 838 bundle.phys_type.open = 0; 839 840 bundle.links = datalink_Create("deflink", &bundle, type); 841 if (bundle.links == NULL) { 842 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno)); 843 iface_Destroy(bundle.iface); 844 bundle.iface = NULL; 845 close(bundle.dev.fd); 846 return NULL; 847 } 848 849 bundle.desc.type = BUNDLE_DESCRIPTOR; 850 bundle.desc.UpdateSet = bundle_UpdateSet; 851 bundle.desc.IsSet = bundle_IsSet; 852 bundle.desc.Read = bundle_DescriptorRead; 853 bundle.desc.Write = bundle_DescriptorWrite; 854 855 mp_Init(&bundle.ncp.mp, &bundle); 856 857 /* Send over the first physical link by default */ 858 ipcp_Init(&bundle.ncp.ipcp, &bundle, &bundle.links->physical->link, 859 &bundle.fsm); 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 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer); 871 bundle.idle.done = 0; 872 bundle.notify.fd = -1; 873 memset(&bundle.autoload.timer, '\0', sizeof bundle.autoload.timer); 874 bundle.autoload.done = 0; 875 bundle.autoload.running = 0; 876 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer); 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 886static void 887bundle_DownInterface(struct bundle *bundle) 888{ 889 struct ifreq ifrq; 890 int s; 891 892 route_IfDelete(bundle, 1); 893 894 s = ID0socket(AF_INET, SOCK_DGRAM, 0); 895 if (s < 0) { 896 log_Printf(LogERROR, "bundle_DownInterface: socket: %s\n", strerror(errno)); 897 return; 898 } 899 900 memset(&ifrq, '\0', sizeof ifrq); 901 strncpy(ifrq.ifr_name, bundle->iface->name, sizeof ifrq.ifr_name - 1); 902 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0'; 903 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) { 904 log_Printf(LogERROR, "bundle_DownInterface: ioctl(SIOCGIFFLAGS): %s\n", 905 strerror(errno)); 906 close(s); 907 return; 908 } 909 ifrq.ifr_flags &= ~IFF_UP; 910 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) { 911 log_Printf(LogERROR, "bundle_DownInterface: ioctl(SIOCSIFFLAGS): %s\n", 912 strerror(errno)); 913 close(s); 914 return; 915 } 916 close(s); 917} 918 919void 920bundle_Destroy(struct bundle *bundle) 921{ 922 struct datalink *dl; 923 924 /* 925 * Clean up the interface. We don't need to timer_Stop()s, mp_Down(), 926 * ipcp_CleanInterface() and bundle_DownInterface() unless we're getting 927 * out under exceptional conditions such as a descriptor exception. 928 */ 929 timer_Stop(&bundle->idle.timer); 930 timer_Stop(&bundle->choked.timer); 931 timer_Stop(&bundle->autoload.timer); 932 mp_Down(&bundle->ncp.mp); 933 ipcp_CleanInterface(&bundle->ncp.ipcp); 934 bundle_DownInterface(bundle); 935 936 /* Again, these are all DATALINK_CLOSED unless we're abending */ 937 dl = bundle->links; 938 while (dl) 939 dl = datalink_Destroy(dl); 940 941 close(bundle->dev.fd); 942 bundle_UnlockTun(bundle); 943 944 /* In case we never made PHASE_NETWORK */ 945 bundle_Notify(bundle, EX_ERRDEAD); 946 947 iface_Destroy(bundle->iface); 948 bundle->iface = NULL; 949} 950 951struct rtmsg { 952 struct rt_msghdr m_rtm; 953 char m_space[64]; 954}; 955 956int 957bundle_SetRoute(struct bundle *bundle, int cmd, struct in_addr dst, 958 struct in_addr gateway, struct in_addr mask, int bang, int ssh) 959{ 960 struct rtmsg rtmes; 961 int s, nb, wb; 962 char *cp; 963 const char *cmdstr; 964 struct sockaddr_in rtdata; 965 int result = 1; 966 967 if (bang) 968 cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!"); 969 else 970 cmdstr = (cmd == RTM_ADD ? "Add" : "Delete"); 971 s = ID0socket(PF_ROUTE, SOCK_RAW, 0); 972 if (s < 0) { 973 log_Printf(LogERROR, "bundle_SetRoute: socket(): %s\n", strerror(errno)); 974 return result; 975 } 976 memset(&rtmes, '\0', sizeof rtmes); 977 rtmes.m_rtm.rtm_version = RTM_VERSION; 978 rtmes.m_rtm.rtm_type = cmd; 979 rtmes.m_rtm.rtm_addrs = RTA_DST; 980 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; 981 rtmes.m_rtm.rtm_pid = getpid(); 982 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 983 984 if (cmd == RTM_ADD || cmd == RTM_CHANGE) { 985 if (bundle->ncp.ipcp.cfg.sendpipe > 0) { 986 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.ipcp.cfg.sendpipe; 987 rtmes.m_rtm.rtm_inits |= RTV_SPIPE; 988 } 989 if (bundle->ncp.ipcp.cfg.recvpipe > 0) { 990 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.ipcp.cfg.recvpipe; 991 rtmes.m_rtm.rtm_inits |= RTV_RPIPE; 992 } 993 } 994 995 memset(&rtdata, '\0', sizeof rtdata); 996 rtdata.sin_len = sizeof rtdata; 997 rtdata.sin_family = AF_INET; 998 rtdata.sin_port = 0; 999 rtdata.sin_addr = dst; 1000 1001 cp = rtmes.m_space; 1002 memcpy(cp, &rtdata, rtdata.sin_len); 1003 cp += rtdata.sin_len; 1004 if (cmd == RTM_ADD) { 1005 if (gateway.s_addr == INADDR_ANY) { 1006 if (!ssh) 1007 log_Printf(LogERROR, "bundle_SetRoute: Cannot add a route with" 1008 " destination 0.0.0.0\n"); 1009 close(s); 1010 return result; 1011 } else { 1012 rtdata.sin_addr = gateway; 1013 memcpy(cp, &rtdata, rtdata.sin_len); 1014 cp += rtdata.sin_len; 1015 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; 1016 } 1017 } 1018 1019 if (dst.s_addr == INADDR_ANY) 1020 mask.s_addr = INADDR_ANY; 1021 1022 if (cmd == RTM_ADD || dst.s_addr == INADDR_ANY) { 1023 rtdata.sin_addr = mask; 1024 memcpy(cp, &rtdata, rtdata.sin_len); 1025 cp += rtdata.sin_len; 1026 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; 1027 } 1028 1029 nb = cp - (char *) &rtmes; 1030 rtmes.m_rtm.rtm_msglen = nb; 1031 wb = ID0write(s, &rtmes, nb); 1032 if (wb < 0) { 1033 log_Printf(LogTCPIP, "bundle_SetRoute failure:\n"); 1034 log_Printf(LogTCPIP, "bundle_SetRoute: Cmd = %s\n", cmdstr); 1035 log_Printf(LogTCPIP, "bundle_SetRoute: Dst = %s\n", inet_ntoa(dst)); 1036 log_Printf(LogTCPIP, "bundle_SetRoute: Gateway = %s\n", inet_ntoa(gateway)); 1037 log_Printf(LogTCPIP, "bundle_SetRoute: Mask = %s\n", inet_ntoa(mask)); 1038failed: 1039 if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST || 1040 (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) { 1041 if (!bang) { 1042 log_Printf(LogWARN, "Add route failed: %s already exists\n", 1043 dst.s_addr == 0 ? "default" : inet_ntoa(dst)); 1044 result = 0; /* Don't add to our dynamic list */ 1045 } else { 1046 rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE; 1047 if ((wb = ID0write(s, &rtmes, nb)) < 0) 1048 goto failed; 1049 } 1050 } else if (cmd == RTM_DELETE && 1051 (rtmes.m_rtm.rtm_errno == ESRCH || 1052 (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) { 1053 if (!bang) 1054 log_Printf(LogWARN, "Del route failed: %s: Non-existent\n", 1055 inet_ntoa(dst)); 1056 } else if (rtmes.m_rtm.rtm_errno == 0) { 1057 if (!ssh || errno != ENETUNREACH) 1058 log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr, 1059 inet_ntoa(dst), strerror(errno)); 1060 } else 1061 log_Printf(LogWARN, "%s route failed: %s: %s\n", 1062 cmdstr, inet_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno)); 1063 } 1064 log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %x, gateway = %x\n", 1065 wb, cmdstr, (unsigned)dst.s_addr, (unsigned)gateway.s_addr); 1066 close(s); 1067 1068 return result; 1069} 1070 1071void 1072bundle_LinkClosed(struct bundle *bundle, struct datalink *dl) 1073{ 1074 /* 1075 * Our datalink has closed. 1076 * CleanDatalinks() (called from DoLoop()) will remove closed 1077 * BACKGROUND and DIRECT links. 1078 * If it's the last data link, enter phase DEAD. 1079 * 1080 * NOTE: dl may not be in our list (bundle_SendDatalink()) ! 1081 */ 1082 1083 struct datalink *odl; 1084 int other_links; 1085 1086 log_SetTtyCommandMode(dl); 1087 1088 other_links = 0; 1089 for (odl = bundle->links; odl; odl = odl->next) 1090 if (odl != dl && odl->state != DATALINK_CLOSED) 1091 other_links++; 1092 1093 if (!other_links) { 1094 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */ 1095 bundle_DownInterface(bundle); 1096 fsm2initial(&bundle->ncp.ipcp.fsm); 1097 bundle_NewPhase(bundle, PHASE_DEAD); 1098 bundle_StopIdleTimer(bundle); 1099 bundle_StopAutoLoadTimer(bundle); 1100 bundle->autoload.running = 0; 1101 } else 1102 bundle->autoload.running = 1; 1103} 1104 1105void 1106bundle_Open(struct bundle *bundle, const char *name, int mask, int force) 1107{ 1108 /* 1109 * Please open the given datalink, or all if name == NULL 1110 */ 1111 struct datalink *dl; 1112 1113 timer_Stop(&bundle->autoload.timer); 1114 for (dl = bundle->links; dl; dl = dl->next) 1115 if (name == NULL || !strcasecmp(dl->name, name)) { 1116 if ((mask & dl->physical->type) && 1117 (dl->state == DATALINK_CLOSED || 1118 (force && dl->state == DATALINK_OPENING && 1119 dl->dial_timer.state == TIMER_RUNNING))) { 1120 if (force) 1121 timer_Stop(&dl->dial_timer); 1122 datalink_Up(dl, 1, 1); 1123 if (mask == PHYS_AUTO) 1124 /* Only one AUTO link at a time (see the AutoLoad timer) */ 1125 break; 1126 } 1127 if (name != NULL) 1128 break; 1129 } 1130} 1131 1132struct datalink * 1133bundle2datalink(struct bundle *bundle, const char *name) 1134{ 1135 struct datalink *dl; 1136 1137 if (name != NULL) { 1138 for (dl = bundle->links; dl; dl = dl->next) 1139 if (!strcasecmp(dl->name, name)) 1140 return dl; 1141 } else if (bundle->links && !bundle->links->next) 1142 return bundle->links; 1143 1144 return NULL; 1145} 1146 1147int 1148bundle_FillQueues(struct bundle *bundle) 1149{ 1150 int total; 1151 1152 if (bundle->ncp.mp.active) 1153 total = mp_FillQueues(bundle); 1154 else { 1155 struct datalink *dl; 1156 int add; 1157 1158 for (total = 0, dl = bundle->links; dl; dl = dl->next) 1159 if (dl->state == DATALINK_OPEN) { 1160 add = link_QueueLen(&dl->physical->link); 1161 if (add == 0 && dl->physical->out == NULL) 1162 add = ip_FlushPacket(&dl->physical->link, bundle); 1163 total += add; 1164 } 1165 } 1166 1167 return total + ip_QueueLen(&bundle->ncp.ipcp); 1168} 1169 1170int 1171bundle_ShowLinks(struct cmdargs const *arg) 1172{ 1173 struct datalink *dl; 1174 1175 for (dl = arg->bundle->links; dl; dl = dl->next) { 1176 prompt_Printf(arg->prompt, "Name: %s [%s, %s]", 1177 dl->name, mode2Nam(dl->physical->type), datalink_State(dl)); 1178 if (dl->physical->link.throughput.rolling && dl->state == DATALINK_OPEN) 1179 prompt_Printf(arg->prompt, " weight %d, %d bytes/sec", 1180 dl->mp.weight, 1181 dl->physical->link.throughput.OctetsPerSecond); 1182 prompt_Printf(arg->prompt, "\n"); 1183 } 1184 1185 return 0; 1186} 1187 1188static const char * 1189optval(struct bundle *bundle, int bit) 1190{ 1191 return (bundle->cfg.opt & bit) ? "enabled" : "disabled"; 1192} 1193 1194int 1195bundle_ShowStatus(struct cmdargs const *arg) 1196{ 1197 int remaining; 1198 1199 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle)); 1200 prompt_Printf(arg->prompt, " Title: %s\n", arg->bundle->argv[0]); 1201 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name); 1202 prompt_Printf(arg->prompt, " Interface: %s @ %lubps\n", 1203 arg->bundle->iface->name, arg->bundle->ifSpeed); 1204 1205 prompt_Printf(arg->prompt, "\nDefaults:\n"); 1206 prompt_Printf(arg->prompt, " Label: %s\n", arg->bundle->cfg.label); 1207 prompt_Printf(arg->prompt, " Auth name: %s\n", 1208 arg->bundle->cfg.auth.name); 1209 prompt_Printf(arg->prompt, " Auto Load: Up after %ds of >= %d packets\n", 1210 arg->bundle->cfg.autoload.max.timeout, 1211 arg->bundle->cfg.autoload.max.packets); 1212 prompt_Printf(arg->prompt, " Down after %ds of <= %d" 1213 " packets\n", arg->bundle->cfg.autoload.min.timeout, 1214 arg->bundle->cfg.autoload.min.packets); 1215 if (arg->bundle->autoload.timer.state == TIMER_RUNNING) 1216 prompt_Printf(arg->prompt, " %ds remaining 'till " 1217 "a link comes %s\n", 1218 bundle_RemainingAutoLoadTime(arg->bundle), 1219 arg->bundle->autoload.comingup ? "up" : "down"); 1220 else 1221 prompt_Printf(arg->prompt, " %srunning with %d" 1222 " packets queued\n", arg->bundle->autoload.running ? 1223 "" : "not ", ip_QueueLen(&arg->bundle->ncp.ipcp)); 1224 1225 prompt_Printf(arg->prompt, " Choked Timer: %ds\n", 1226 arg->bundle->cfg.choked.timeout); 1227 prompt_Printf(arg->prompt, " Idle Timer: "); 1228 if (arg->bundle->cfg.idle_timeout) { 1229 prompt_Printf(arg->prompt, "%ds", arg->bundle->cfg.idle_timeout); 1230 remaining = bundle_RemainingIdleTime(arg->bundle); 1231 if (remaining != -1) 1232 prompt_Printf(arg->prompt, " (%ds remaining)", remaining); 1233 prompt_Printf(arg->prompt, "\n"); 1234 } else 1235 prompt_Printf(arg->prompt, "disabled\n"); 1236 prompt_Printf(arg->prompt, " MTU: "); 1237 if (arg->bundle->cfg.mtu) 1238 prompt_Printf(arg->prompt, "%d\n", arg->bundle->cfg.mtu); 1239 else 1240 prompt_Printf(arg->prompt, "unspecified\n"); 1241 1242 prompt_Printf(arg->prompt, " sendpipe: "); 1243 if (arg->bundle->ncp.ipcp.cfg.sendpipe > 0) 1244 prompt_Printf(arg->prompt, "%ld\n", arg->bundle->ncp.ipcp.cfg.sendpipe); 1245 else 1246 prompt_Printf(arg->prompt, "unspecified\n"); 1247 prompt_Printf(arg->prompt, " recvpipe: "); 1248 if (arg->bundle->ncp.ipcp.cfg.recvpipe > 0) 1249 prompt_Printf(arg->prompt, "%ld\n", arg->bundle->ncp.ipcp.cfg.recvpipe); 1250 else 1251 prompt_Printf(arg->prompt, "unspecified\n"); 1252 1253 prompt_Printf(arg->prompt, " Sticky Routes: %s\n", 1254 optval(arg->bundle, OPT_SROUTES)); 1255 prompt_Printf(arg->prompt, " ID check: %s\n", 1256 optval(arg->bundle, OPT_IDCHECK)); 1257 prompt_Printf(arg->prompt, " Loopback: %s\n", 1258 optval(arg->bundle, OPT_LOOPBACK)); 1259 prompt_Printf(arg->prompt, " PasswdAuth: %s\n", 1260 optval(arg->bundle, OPT_PASSWDAUTH)); 1261 prompt_Printf(arg->prompt, " Proxy: %s\n", 1262 optval(arg->bundle, OPT_PROXY)); 1263 prompt_Printf(arg->prompt, " Proxyall: %s\n", 1264 optval(arg->bundle, OPT_PROXYALL)); 1265 prompt_Printf(arg->prompt, " Throughput: %s\n", 1266 optval(arg->bundle, OPT_THROUGHPUT)); 1267 prompt_Printf(arg->prompt, " Utmp Logging: %s\n", 1268 optval(arg->bundle, OPT_UTMP)); 1269 prompt_Printf(arg->prompt, " Iface-Alias: %s\n", 1270 optval(arg->bundle, OPT_IFACEALIAS)); 1271 1272 return 0; 1273} 1274 1275static void 1276bundle_IdleTimeout(void *v) 1277{ 1278 struct bundle *bundle = (struct bundle *)v; 1279 1280 log_Printf(LogPHASE, "Idle timer expired.\n"); 1281 bundle_StopIdleTimer(bundle); 1282 bundle_Close(bundle, NULL, CLOSE_STAYDOWN); 1283} 1284 1285/* 1286 * Start Idle timer. If timeout is reached, we call bundle_Close() to 1287 * close LCP and link. 1288 */ 1289void 1290bundle_StartIdleTimer(struct bundle *bundle) 1291{ 1292 timer_Stop(&bundle->idle.timer); 1293 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != 1294 bundle->phys_type.open && bundle->cfg.idle_timeout) { 1295 bundle->idle.timer.func = bundle_IdleTimeout; 1296 bundle->idle.timer.name = "idle"; 1297 bundle->idle.timer.load = bundle->cfg.idle_timeout * SECTICKS; 1298 bundle->idle.timer.arg = bundle; 1299 timer_Start(&bundle->idle.timer); 1300 bundle->idle.done = time(NULL) + bundle->cfg.idle_timeout; 1301 } 1302} 1303 1304void 1305bundle_SetIdleTimer(struct bundle *bundle, int value) 1306{ 1307 bundle->cfg.idle_timeout = value; 1308 if (bundle_LinkIsUp(bundle)) 1309 bundle_StartIdleTimer(bundle); 1310} 1311 1312void 1313bundle_StopIdleTimer(struct bundle *bundle) 1314{ 1315 timer_Stop(&bundle->idle.timer); 1316 bundle->idle.done = 0; 1317} 1318 1319static int 1320bundle_RemainingIdleTime(struct bundle *bundle) 1321{ 1322 if (bundle->idle.done) 1323 return bundle->idle.done - time(NULL); 1324 return -1; 1325} 1326 1327int 1328bundle_IsDead(struct bundle *bundle) 1329{ 1330 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp); 1331} 1332 1333static struct datalink * 1334bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl) 1335{ 1336 struct datalink **dlp; 1337 1338 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next) 1339 if (*dlp == dl) { 1340 *dlp = dl->next; 1341 dl->next = NULL; 1342 bundle_LinksRemoved(bundle); 1343 return dl; 1344 } 1345 1346 return NULL; 1347} 1348 1349static void 1350bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl) 1351{ 1352 struct datalink **dlp = &bundle->links; 1353 1354 while (*dlp) 1355 dlp = &(*dlp)->next; 1356 1357 *dlp = dl; 1358 dl->next = NULL; 1359 1360 bundle_LinkAdded(bundle, dl); 1361} 1362 1363void 1364bundle_CleanDatalinks(struct bundle *bundle) 1365{ 1366 struct datalink **dlp = &bundle->links; 1367 int found = 0; 1368 1369 while (*dlp) 1370 if ((*dlp)->state == DATALINK_CLOSED && 1371 (*dlp)->physical->type & (PHYS_DIRECT|PHYS_BACKGROUND)) { 1372 *dlp = datalink_Destroy(*dlp); 1373 found++; 1374 } else 1375 dlp = &(*dlp)->next; 1376 1377 if (found) 1378 bundle_LinksRemoved(bundle); 1379} 1380 1381int 1382bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl, 1383 const char *name) 1384{ 1385 if (bundle2datalink(bundle, name)) { 1386 log_Printf(LogWARN, "Clone: %s: name already exists\n", name); 1387 return 0; 1388 } 1389 1390 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name)); 1391 return 1; 1392} 1393 1394void 1395bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl) 1396{ 1397 dl = bundle_DatalinkLinkout(bundle, dl); 1398 if (dl) 1399 datalink_Destroy(dl); 1400} 1401 1402void 1403bundle_SetLabel(struct bundle *bundle, const char *label) 1404{ 1405 if (label) 1406 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1); 1407 else 1408 *bundle->cfg.label = '\0'; 1409} 1410 1411const char * 1412bundle_GetLabel(struct bundle *bundle) 1413{ 1414 return *bundle->cfg.label ? bundle->cfg.label : NULL; 1415} 1416 1417void 1418bundle_ReceiveDatalink(struct bundle *bundle, int s, struct sockaddr_un *sun) 1419{ 1420 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int)]; 1421 struct cmsghdr *cmsg = (struct cmsghdr *)cmsgbuf; 1422 struct msghdr msg; 1423 struct iovec iov[SCATTER_SEGMENTS]; 1424 struct datalink *dl; 1425 int niov, link_fd, expect, f; 1426 pid_t pid; 1427 1428 log_Printf(LogPHASE, "Receiving datalink\n"); 1429 1430 /* Create our scatter/gather array */ 1431 niov = 1; 1432 iov[0].iov_len = strlen(Version) + 1; 1433 iov[0].iov_base = (char *)malloc(iov[0].iov_len); 1434 if (datalink2iov(NULL, iov, &niov, sizeof iov / sizeof *iov, 0) == -1) { 1435 close(s); 1436 return; 1437 } 1438 1439 pid = getpid(); 1440 write(s, &pid, sizeof pid); 1441 1442 for (f = expect = 0; f < niov; f++) 1443 expect += iov[f].iov_len; 1444 1445 /* Set up our message */ 1446 cmsg->cmsg_len = sizeof cmsgbuf; 1447 cmsg->cmsg_level = SOL_SOCKET; 1448 cmsg->cmsg_type = 0; 1449 1450 memset(&msg, '\0', sizeof msg); 1451 msg.msg_name = (caddr_t)sun; 1452 msg.msg_namelen = sizeof *sun; 1453 msg.msg_iov = iov; 1454 msg.msg_iovlen = niov; 1455 msg.msg_control = cmsgbuf; 1456 msg.msg_controllen = sizeof cmsgbuf; 1457 1458 log_Printf(LogDEBUG, "Expecting %d scatter/gather bytes\n", expect); 1459 f = expect + 100; 1460 setsockopt(s, SOL_SOCKET, SO_RCVBUF, &f, sizeof f); 1461 if ((f = recvmsg(s, &msg, MSG_WAITALL)) != expect) { 1462 if (f == -1) 1463 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); 1464 else 1465 log_Printf(LogERROR, "Failed recvmsg: Got %d, not %d\n", f, expect); 1466 while (niov--) 1467 free(iov[niov].iov_base); 1468 close(s); 1469 return; 1470 } 1471 1472 write(s, "!", 1); /* ACK */ 1473 close(s); 1474 1475 if (cmsg->cmsg_type != SCM_RIGHTS) { 1476 log_Printf(LogERROR, "Recvmsg: no descriptor received !\n"); 1477 while (niov--) 1478 free(iov[niov].iov_base); 1479 return; 1480 } 1481 1482 /* We've successfully received an open file descriptor through our socket */ 1483 log_Printf(LogDEBUG, "Receiving device descriptor\n"); 1484 link_fd = *(int *)CMSG_DATA(cmsg); 1485 1486 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) { 1487 log_Printf(LogWARN, "Cannot receive datalink, incorrect version" 1488 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len, 1489 (char *)iov[0].iov_base, Version); 1490 close(link_fd); 1491 while (niov--) 1492 free(iov[niov].iov_base); 1493 return; 1494 } 1495 1496 niov = 1; 1497 dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, link_fd); 1498 if (dl) { 1499 bundle_DatalinkLinkin(bundle, dl); 1500 datalink_AuthOk(dl); 1501 } else 1502 close(link_fd); 1503 1504 free(iov[0].iov_base); 1505} 1506 1507void 1508bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun) 1509{ 1510 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int)], ack; 1511 struct cmsghdr *cmsg = (struct cmsghdr *)cmsgbuf; 1512 struct msghdr msg; 1513 struct iovec iov[SCATTER_SEGMENTS]; 1514 int niov, link_fd, f, expect, newsid; 1515 pid_t newpid; 1516 1517 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name); 1518 1519 bundle_LinkClosed(dl->bundle, dl); 1520 bundle_DatalinkLinkout(dl->bundle, dl); 1521 1522 /* Build our scatter/gather array */ 1523 iov[0].iov_len = strlen(Version) + 1; 1524 iov[0].iov_base = strdup(Version); 1525 niov = 1; 1526 1527 read(s, &newpid, sizeof newpid); 1528 link_fd = datalink2iov(dl, iov, &niov, sizeof iov / sizeof *iov, newpid); 1529 1530 if (link_fd != -1) { 1531 memset(&msg, '\0', sizeof msg); 1532 1533 msg.msg_name = (caddr_t)sun; 1534 msg.msg_namelen = sizeof *sun; 1535 msg.msg_iov = iov; 1536 msg.msg_iovlen = niov; 1537 1538 cmsg->cmsg_len = sizeof cmsgbuf; 1539 cmsg->cmsg_level = SOL_SOCKET; 1540 cmsg->cmsg_type = SCM_RIGHTS; 1541 *(int *)CMSG_DATA(cmsg) = link_fd; 1542 msg.msg_control = cmsgbuf; 1543 msg.msg_controllen = sizeof cmsgbuf; 1544 1545 for (f = expect = 0; f < niov; f++) 1546 expect += iov[f].iov_len; 1547 1548 log_Printf(LogDEBUG, "Sending %d bytes in scatter/gather array\n", expect); 1549 1550 f = expect + SOCKET_OVERHEAD; 1551 setsockopt(s, SOL_SOCKET, SO_SNDBUF, &f, sizeof f); 1552 if (sendmsg(s, &msg, 0) == -1) 1553 log_Printf(LogERROR, "Failed sendmsg: %s\n", strerror(errno)); 1554 /* We must get the ACK before closing the descriptor ! */ 1555 read(s, &ack, 1); 1556 1557 newsid = tcgetpgrp(link_fd) == getpgrp(); 1558 close(link_fd); 1559 if (newsid) 1560 bundle_setsid(dl->bundle, 1); 1561 } 1562 close(s); 1563 1564 while (niov--) 1565 free(iov[niov].iov_base); 1566} 1567 1568int 1569bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl, 1570 const char *name) 1571{ 1572 struct datalink *dl; 1573 1574 if (!strcasecmp(ndl->name, name)) 1575 return 1; 1576 1577 for (dl = bundle->links; dl; dl = dl->next) 1578 if (!strcasecmp(dl->name, name)) 1579 return 0; 1580 1581 datalink_Rename(ndl, name); 1582 return 1; 1583} 1584 1585int 1586bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode) 1587{ 1588 int omode; 1589 1590 omode = dl->physical->type; 1591 if (omode == mode) 1592 return 1; 1593 1594 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO)) 1595 /* First auto link */ 1596 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) { 1597 log_Printf(LogWARN, "You must `set ifaddr' or `open' before" 1598 " changing mode to %s\n", mode2Nam(mode)); 1599 return 0; 1600 } 1601 1602 if (!datalink_SetMode(dl, mode)) 1603 return 0; 1604 1605 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) && 1606 bundle->phase != PHASE_NETWORK) 1607 /* First auto link, we need an interface */ 1608 ipcp_InterfaceUp(&bundle->ncp.ipcp); 1609 1610 /* Regenerate phys_type and adjust autoload & idle timers */ 1611 bundle_LinksRemoved(bundle); 1612 1613 return 1; 1614} 1615 1616void 1617bundle_setsid(struct bundle *bundle, int holdsession) 1618{ 1619 /* 1620 * Lose the current session. This means getting rid of our pid 1621 * too so that the tty device will really go away, and any getty 1622 * etc will be allowed to restart. 1623 */ 1624 pid_t pid, orig; 1625 int fds[2]; 1626 char done; 1627 struct datalink *dl; 1628 1629 orig = getpid(); 1630 if (pipe(fds) == -1) { 1631 log_Printf(LogERROR, "pipe: %s\n", strerror(errno)); 1632 return; 1633 } 1634 switch ((pid = fork())) { 1635 case -1: 1636 log_Printf(LogERROR, "fork: %s\n", strerror(errno)); 1637 close(fds[0]); 1638 close(fds[1]); 1639 return; 1640 case 0: 1641 close(fds[0]); 1642 read(fds[1], &done, 1); /* uu_locks are mine ! */ 1643 close(fds[1]); 1644 if (pipe(fds) == -1) { 1645 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno)); 1646 return; 1647 } 1648 switch ((pid = fork())) { 1649 case -1: 1650 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno)); 1651 close(fds[0]); 1652 close(fds[1]); 1653 return; 1654 case 0: 1655 close(fds[0]); 1656 bundle_LockTun(bundle); /* update pid */ 1657 read(fds[1], &done, 1); /* uu_locks are mine ! */ 1658 close(fds[1]); 1659 setsid(); 1660 log_Printf(LogPHASE, "%d -> %d: %s session control\n", 1661 (int)orig, (int)getpid(), 1662 holdsession ? "Passed" : "Dropped"); 1663 timer_InitService(0); /* Start the Timer Service */ 1664 break; 1665 default: 1666 close(fds[1]); 1667 /* Give away all our modem locks (to the final process) */ 1668 for (dl = bundle->links; dl; dl = dl->next) 1669 if (dl->state != DATALINK_CLOSED) 1670 modem_ChangedPid(dl->physical, pid); 1671 write(fds[0], "!", 1); /* done */ 1672 close(fds[0]); 1673 exit(0); 1674 break; 1675 } 1676 break; 1677 default: 1678 close(fds[1]); 1679 /* Give away all our modem locks (to the intermediate process) */ 1680 for (dl = bundle->links; dl; dl = dl->next) 1681 if (dl->state != DATALINK_CLOSED) 1682 modem_ChangedPid(dl->physical, pid); 1683 write(fds[0], "!", 1); /* done */ 1684 close(fds[0]); 1685 if (holdsession) { 1686 int fd, status; 1687 1688 timer_TermService(); 1689 signal(SIGPIPE, SIG_DFL); 1690 signal(SIGALRM, SIG_DFL); 1691 signal(SIGHUP, SIG_DFL); 1692 signal(SIGTERM, SIG_DFL); 1693 signal(SIGINT, SIG_DFL); 1694 signal(SIGQUIT, SIG_DFL); 1695 for (fd = getdtablesize(); fd >= 0; fd--) 1696 close(fd); 1697 setuid(geteuid()); 1698 /* 1699 * Reap the intermediate process. As we're not exiting but the 1700 * intermediate is, we don't want it to become defunct. 1701 */ 1702 waitpid(pid, &status, 0); 1703 /* Tweak our process arguments.... */ 1704 bundle->argv[0] = "session owner"; 1705 bundle->argv[1] = NULL; 1706 /* 1707 * Hang around for a HUP. This should happen as soon as the 1708 * ppp that we passed our ctty descriptor to closes it. 1709 * NOTE: If this process dies, the passed descriptor becomes 1710 * invalid and will give a select() error by setting one 1711 * of the error fds, aborting the other ppp. We don't 1712 * want that to happen ! 1713 */ 1714 pause(); 1715 } 1716 exit(0); 1717 break; 1718 } 1719} 1720 1721int 1722bundle_HighestState(struct bundle *bundle) 1723{ 1724 struct datalink *dl; 1725 int result = DATALINK_CLOSED; 1726 1727 for (dl = bundle->links; dl; dl = dl->next) 1728 if (result < dl->state) 1729 result = dl->state; 1730 1731 return result; 1732} 1733 1734int 1735bundle_Exception(struct bundle *bundle, int fd) 1736{ 1737 struct datalink *dl; 1738 1739 for (dl = bundle->links; dl; dl = dl->next) 1740 if (dl->physical->fd == fd) { 1741 datalink_Down(dl, CLOSE_NORMAL); 1742 return 1; 1743 } 1744 1745 return 0; 1746} 1747