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Pull morse(6) into the new millenium and teach it to use sound(4).
[dragonfly.git] / usr.sbin / ppp / bundle.c
blob0dfaf30e3869045021e1242496a0d8e3c4aa88ea
1 /*-
2 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/usr.sbin/ppp/bundle.c,v 1.84.2.12 2002/09/01 02:12:22 brian Exp $
27 * $DragonFly: src/usr.sbin/ppp/bundle.c,v 1.5 2005/11/24 23:42:54 swildner Exp $
28 */
29
30 #include <sys/param.h>
31 #include <sys/socket.h>
32 #include <netinet/in.h>
33 #include <net/if.h>
34 #include <net/tun/if_tun.h> /* For TUNS* ioctls */
35 #include <net/route.h>
36 #include <netinet/in_systm.h>
37 #include <netinet/ip.h>
38 #include <sys/un.h>
39
40 #include <errno.h>
41 #include <fcntl.h>
42 #ifdef __OpenBSD__
43 #include <util.h>
44 #else
45 #include <libutil.h>
46 #endif
47 #include <paths.h>
48 #include <stdarg.h>
49 #include <stdio.h>
50 #include <stdlib.h>
51 #include <string.h>
52 #include <sys/uio.h>
53 #include <sys/wait.h>
54 #include <termios.h>
55 #include <unistd.h>
56
57 #include "layer.h"
58 #include "defs.h"
59 #include "command.h"
60 #include "mbuf.h"
61 #include "log.h"
62 #include "id.h"
63 #include "timer.h"
64 #include "fsm.h"
65 #include "iplist.h"
66 #include "lqr.h"
67 #include "hdlc.h"
68 #include "throughput.h"
69 #include "slcompress.h"
70 #include "ncpaddr.h"
71 #include "ip.h"
72 #include "ipcp.h"
73 #include "filter.h"
74 #include "descriptor.h"
75 #include "route.h"
76 #include "lcp.h"
77 #include "ccp.h"
78 #include "link.h"
79 #include "mp.h"
80 #ifndef NORADIUS
81 #include "radius.h"
82 #endif
83 #include "ipv6cp.h"
84 #include "ncp.h"
85 #include "bundle.h"
86 #include "async.h"
87 #include "physical.h"
88 #include "auth.h"
89 #include "proto.h"
90 #include "chap.h"
91 #include "tun.h"
92 #include "prompt.h"
93 #include "chat.h"
94 #include "cbcp.h"
95 #include "datalink.h"
96 #include "iface.h"
97 #include "server.h"
98 #include "probe.h"
99 #ifndef NODES
100 #include "mppe.h"
101 #endif
102
103 #define SCATTER_SEGMENTS 7 /* version, datalink, name, physical,
104 throughput, throughput, device */
105
106 #define SEND_MAXFD 3 /* Max file descriptors passed through
107 the local domain socket */
108
109 static int bundle_RemainingIdleTime(struct bundle *);
110
111 static const char * const PhaseNames[] = {
112 "Dead", "Establish", "Authenticate", "Network", "Terminate"
113 };
114
115 const char *
116 bundle_PhaseName(struct bundle *bundle)
117 {
118 return bundle->phase <= PHASE_TERMINATE ?
119 PhaseNames[bundle->phase] : "unknown";
120 }
121
122 void
123 bundle_NewPhase(struct bundle *bundle, u_int new)
124 {
125 if (new == bundle->phase)
126 return;
127
128 if (new <= PHASE_TERMINATE)
129 log_Printf(LogPHASE, "bundle: %s\n", PhaseNames[new]);
130
131 switch (new) {
132 case PHASE_DEAD:
133 bundle->phase = new;
134 #ifndef NODES
135 MPPE_MasterKeyValid = 0;
136 #endif
137 log_DisplayPrompts();
138 break;
139
140 case PHASE_ESTABLISH:
141 bundle->phase = new;
142 break;
143
144 case PHASE_AUTHENTICATE:
145 bundle->phase = new;
146 log_DisplayPrompts();
147 break;
148
149 case PHASE_NETWORK:
150 if (ncp_fsmStart(&bundle->ncp, bundle)) {
151 bundle->phase = new;
152 log_DisplayPrompts();
153 } else {
154 log_Printf(LogPHASE, "bundle: All NCPs are disabled\n");
155 bundle_Close(bundle, NULL, CLOSE_STAYDOWN);
156 }
157 break;
158
159 case PHASE_TERMINATE:
160 bundle->phase = new;
161 mp_Down(&bundle->ncp.mp);
162 log_DisplayPrompts();
163 break;
164 }
165 }
166
167 static void
168 bundle_LayerStart(void *v, struct fsm *fp)
169 {
170 /* The given FSM is about to start up ! */
171 }
172
173
174 void
175 bundle_Notify(struct bundle *bundle, char c)
176 {
177 if (bundle->notify.fd != -1) {
178 int ret;
179
180 ret = write(bundle->notify.fd, &c, 1);
181 if (c != EX_REDIAL && c != EX_RECONNECT) {
182 if (ret == 1)
183 log_Printf(LogCHAT, "Parent notified of %s\n",
184 c == EX_NORMAL ? "success" : "failure");
185 else
186 log_Printf(LogERROR, "Failed to notify parent of success\n");
187 close(bundle->notify.fd);
188 bundle->notify.fd = -1;
189 } else if (ret == 1)
190 log_Printf(LogCHAT, "Parent notified of %s\n", ex_desc(c));
191 else
192 log_Printf(LogERROR, "Failed to notify parent of %s\n", ex_desc(c));
193 }
194 }
195
196 static void
197 bundle_ClearQueues(void *v)
198 {
199 struct bundle *bundle = (struct bundle *)v;
200 struct datalink *dl;
201
202 log_Printf(LogPHASE, "Clearing choked output queue\n");
203 timer_Stop(&bundle->choked.timer);
204
205 /*
206 * Emergency time:
207 *
208 * We've had a full queue for PACKET_DEL_SECS seconds without being
209 * able to get rid of any of the packets. We've probably given up
210 * on the redials at this point, and the queued data has almost
211 * definitely been timed out by the layer above. As this is preventing
212 * us from reading the TUN_NAME device (we don't want to buffer stuff
213 * indefinitely), we may as well nuke this data and start with a clean
214 * slate !
215 *
216 * Unfortunately, this has the side effect of shafting any compression
217 * dictionaries in use (causing the relevant RESET_REQ/RESET_ACK).
218 */
219
220 ncp_DeleteQueues(&bundle->ncp);
221 for (dl = bundle->links; dl; dl = dl->next)
222 physical_DeleteQueue(dl->physical);
223 }
224
225 static void
226 bundle_LinkAdded(struct bundle *bundle, struct datalink *dl)
227 {
228 bundle->phys_type.all |= dl->physical->type;
229 if (dl->state == DATALINK_OPEN)
230 bundle->phys_type.open |= dl->physical->type;
231
232 #ifndef NORADIUS
233 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL))
234 != bundle->phys_type.open && bundle->session.timer.state == TIMER_STOPPED)
235 if (bundle->radius.sessiontime)
236 bundle_StartSessionTimer(bundle, 0);
237 #endif
238
239 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL))
240 != bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED)
241 /* We may need to start our idle timer */
242 bundle_StartIdleTimer(bundle, 0);
243 }
244
245 void
246 bundle_LinksRemoved(struct bundle *bundle)
247 {
248 struct datalink *dl;
249
250 bundle->phys_type.all = bundle->phys_type.open = 0;
251 for (dl = bundle->links; dl; dl = dl->next)
252 bundle_LinkAdded(bundle, dl);
253
254 bundle_CalculateBandwidth(bundle);
255 mp_CheckAutoloadTimer(&bundle->ncp.mp);
256
257 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL))
258 == bundle->phys_type.open) {
259 #ifndef NORADIUS
260 if (bundle->radius.sessiontime)
261 bundle_StopSessionTimer(bundle);
262 #endif
263 bundle_StopIdleTimer(bundle);
264 }
265 }
266
267 static void
268 bundle_LayerUp(void *v, struct fsm *fp)
269 {
270 /*
271 * The given fsm is now up
272 * If it's an LCP, adjust our phys_mode.open value and check the
273 * autoload timer.
274 * If it's the first NCP, calculate our bandwidth
275 * If it's the first NCP, set our ``upat'' time
276 * If it's the first NCP, start the idle timer.
277 * If it's an NCP, tell our -background parent to go away.
278 * If it's the first NCP, start the autoload timer
279 */
280 struct bundle *bundle = (struct bundle *)v;
281
282 if (fp->proto == PROTO_LCP) {
283 struct physical *p = link2physical(fp->link);
284
285 bundle_LinkAdded(bundle, p->dl);
286 mp_CheckAutoloadTimer(&bundle->ncp.mp);
287 } else if (isncp(fp->proto)) {
288 if (ncp_LayersOpen(&fp->bundle->ncp) == 1) {
289 bundle_CalculateBandwidth(fp->bundle);
290 time(&bundle->upat);
291 #ifndef NORADIUS
292 if (bundle->radius.sessiontime)
293 bundle_StartSessionTimer(bundle, 0);
294 #endif
295 bundle_StartIdleTimer(bundle, 0);
296 mp_CheckAutoloadTimer(&fp->bundle->ncp.mp);
297 }
298 bundle_Notify(bundle, EX_NORMAL);
299 } else if (fp->proto == PROTO_CCP)
300 bundle_CalculateBandwidth(fp->bundle); /* Against ccp_MTUOverhead */
301 }
302
303 static void
304 bundle_LayerDown(void *v, struct fsm *fp)
305 {
306 /*
307 * The given FSM has been told to come down.
308 * If it's our last NCP, stop the idle timer.
309 * If it's our last NCP, clear our ``upat'' value.
310 * If it's our last NCP, stop the autoload timer
311 * If it's an LCP, adjust our phys_type.open value and any timers.
312 * If it's an LCP and we're in multilink mode, adjust our tun
313 * If it's the last LCP, down all NCPs
314 * speed and make sure our minimum sequence number is adjusted.
315 */
316
317 struct bundle *bundle = (struct bundle *)v;
318
319 if (isncp(fp->proto)) {
320 if (ncp_LayersOpen(&fp->bundle->ncp) == 0) {
321 #ifndef NORADIUS
322 if (bundle->radius.sessiontime)
323 bundle_StopSessionTimer(bundle);
324 #endif
325 bundle_StopIdleTimer(bundle);
326 bundle->upat = 0;
327 mp_StopAutoloadTimer(&bundle->ncp.mp);
328 }
329 } else if (fp->proto == PROTO_LCP) {
330 struct datalink *dl;
331 struct datalink *lost;
332 int others_active;
333
334 bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */
335
336 lost = NULL;
337 others_active = 0;
338 for (dl = bundle->links; dl; dl = dl->next) {
339 if (fp == &dl->physical->link.lcp.fsm)
340 lost = dl;
341 else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP)
342 others_active++;
343 }
344
345 if (bundle->ncp.mp.active) {
346 bundle_CalculateBandwidth(bundle);
347
348 if (lost)
349 mp_LinkLost(&bundle->ncp.mp, lost);
350 else
351 log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n",
352 fp->link->name);
353 }
354
355 if (!others_active) {
356 /* Down the NCPs. We don't expect to get fsm_Close()d ourself ! */
357 ncp2initial(&bundle->ncp);
358 mp_Down(&bundle->ncp.mp);
359 }
360 }
361 }
362
363 static void
364 bundle_LayerFinish(void *v, struct fsm *fp)
365 {
366 /* The given fsm is now down (fp cannot be NULL)
367 *
368 * If it's the last NCP, fsm_Close all LCPs
369 * If it's the last NCP, bring any MP layer down
370 */
371
372 struct bundle *bundle = (struct bundle *)v;
373 struct datalink *dl;
374
375 if (isncp(fp->proto) && !ncp_LayersUnfinished(&bundle->ncp)) {
376 if (bundle_Phase(bundle) != PHASE_DEAD)
377 bundle_NewPhase(bundle, PHASE_TERMINATE);
378 for (dl = bundle->links; dl; dl = dl->next)
379 if (dl->state == DATALINK_OPEN)
380 datalink_Close(dl, CLOSE_STAYDOWN);
381 fsm2initial(fp);
382 mp_Down(&bundle->ncp.mp);
383 }
384 }
385
386 void
387 bundle_Close(struct bundle *bundle, const char *name, int how)
388 {
389 /*
390 * Please close the given datalink.
391 * If name == NULL or name is the last datalink, fsm_Close all NCPs
392 * (except our MP)
393 * If it isn't the last datalink, just Close that datalink.
394 */
395
396 struct datalink *dl, *this_dl;
397 int others_active;
398
399 others_active = 0;
400 this_dl = NULL;
401
402 for (dl = bundle->links; dl; dl = dl->next) {
403 if (name && !strcasecmp(name, dl->name))
404 this_dl = dl;
405 if (name == NULL || this_dl == dl) {
406 switch (how) {
407 case CLOSE_LCP:
408 datalink_DontHangup(dl);
409 break;
410 case CLOSE_STAYDOWN:
411 datalink_StayDown(dl);
412 break;
413 }
414 } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP)
415 others_active++;
416 }
417
418 if (name && this_dl == NULL) {
419 log_Printf(LogWARN, "%s: Invalid datalink name\n", name);
420 return;
421 }
422
423 if (!others_active) {
424 #ifndef NORADIUS
425 if (bundle->radius.sessiontime)
426 bundle_StopSessionTimer(bundle);
427 #endif
428 bundle_StopIdleTimer(bundle);
429 if (ncp_LayersUnfinished(&bundle->ncp))
430 ncp_Close(&bundle->ncp);
431 else {
432 ncp2initial(&bundle->ncp);
433 mp_Down(&bundle->ncp.mp);
434 for (dl = bundle->links; dl; dl = dl->next)
435 datalink_Close(dl, how);
436 }
437 } else if (this_dl && this_dl->state != DATALINK_CLOSED &&
438 this_dl->state != DATALINK_HANGUP)
439 datalink_Close(this_dl, how);
440 }
441
442 void
443 bundle_Down(struct bundle *bundle, int how)
444 {
445 struct datalink *dl;
446
447 for (dl = bundle->links; dl; dl = dl->next)
448 datalink_Down(dl, how);
449 }
450
451 static int
452 bundle_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
453 {
454 struct bundle *bundle = descriptor2bundle(d);
455 struct datalink *dl;
456 int result, nlinks;
457 u_short ifqueue;
458 size_t queued;
459
460 result = 0;
461
462 /* If there are aren't many packets queued, look for some more. */
463 for (nlinks = 0, dl = bundle->links; dl; dl = dl->next)
464 nlinks++;
465
466 if (nlinks) {
467 queued = r ? ncp_FillPhysicalQueues(&bundle->ncp, bundle) :
468 ncp_QueueLen(&bundle->ncp);
469
470 if (r && (bundle->phase == PHASE_NETWORK ||
471 bundle->phys_type.all & PHYS_AUTO)) {
472 /* enough surplus so that we can tell if we're getting swamped */
473 ifqueue = nlinks > bundle->cfg.ifqueue ? nlinks : bundle->cfg.ifqueue;
474 if (queued < ifqueue) {
475 /* Not enough - select() for more */
476 if (bundle->choked.timer.state == TIMER_RUNNING)
477 timer_Stop(&bundle->choked.timer); /* Not needed any more */
478 FD_SET(bundle->dev.fd, r);
479 if (*n < bundle->dev.fd + 1)
480 *n = bundle->dev.fd + 1;
481 log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd);
482 result++;
483 } else if (bundle->choked.timer.state == TIMER_STOPPED) {
484 bundle->choked.timer.func = bundle_ClearQueues;
485 bundle->choked.timer.name = "output choke";
486 bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS;
487 bundle->choked.timer.arg = bundle;
488 timer_Start(&bundle->choked.timer);
489 }
490 }
491 }
492
493 #ifndef NORADIUS
494 result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n);
495 #endif
496
497 /* Which links need a select() ? */
498 for (dl = bundle->links; dl; dl = dl->next)
499 result += descriptor_UpdateSet(&dl->desc, r, w, e, n);
500
501 /*
502 * This *MUST* be called after the datalink UpdateSet()s as it
503 * might be ``holding'' one of the datalinks (death-row) and
504 * wants to be able to de-select() it from the descriptor set.
505 */
506 result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n);
507
508 return result;
509 }
510
511 static int
512 bundle_IsSet(struct fdescriptor *d, const fd_set *fdset)
513 {
514 struct bundle *bundle = descriptor2bundle(d);
515 struct datalink *dl;
516
517 for (dl = bundle->links; dl; dl = dl->next)
518 if (descriptor_IsSet(&dl->desc, fdset))
519 return 1;
520
521 #ifndef NORADIUS
522 if (descriptor_IsSet(&bundle->radius.desc, fdset))
523 return 1;
524 #endif
525
526 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset))
527 return 1;
528
529 return FD_ISSET(bundle->dev.fd, fdset);
530 }
531
532 static void
533 bundle_DescriptorRead(struct fdescriptor *d, struct bundle *bundle,
534 const fd_set *fdset)
535 {
536 struct datalink *dl;
537 unsigned secs;
538 u_int32_t af;
539
540 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset))
541 descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset);
542
543 for (dl = bundle->links; dl; dl = dl->next)
544 if (descriptor_IsSet(&dl->desc, fdset))
545 descriptor_Read(&dl->desc, bundle, fdset);
546
547 #ifndef NORADIUS
548 if (descriptor_IsSet(&bundle->radius.desc, fdset))
549 descriptor_Read(&bundle->radius.desc, bundle, fdset);
550 #endif
551
552 if (FD_ISSET(bundle->dev.fd, fdset)) {
553 struct tun_data tun;
554 int n, pri;
555 u_char *data;
556 size_t sz;
557
558 if (bundle->dev.header) {
559 data = (u_char *)&tun;
560 sz = sizeof tun;
561 } else {
562 data = tun.data;
563 sz = sizeof tun.data;
564 }
565
566 /* something to read from tun */
567
568 n = read(bundle->dev.fd, data, sz);
569 if (n < 0) {
570 log_Printf(LogWARN, "%s: read: %s\n", bundle->dev.Name, strerror(errno));
571 return;
572 }
573
574 if (bundle->dev.header) {
575 n -= sz - sizeof tun.data;
576 if (n <= 0) {
577 log_Printf(LogERROR, "%s: read: Got only %d bytes of data !\n",
578 bundle->dev.Name, n);
579 return;
580 }
581 af = ntohl(tun.header.family);
582 #ifndef NOINET6
583 if (af != AF_INET && af != AF_INET6)
584 #else
585 if (af != AF_INET)
586 #endif
587 /* XXX: Should be maintaining drop/family counts ! */
588 return;
589 } else
590 af = AF_INET;
591
592 if (af == AF_INET && ((struct ip *)tun.data)->ip_dst.s_addr ==
593 bundle->ncp.ipcp.my_ip.s_addr) {
594 /* we've been asked to send something addressed *to* us :( */
595 if (Enabled(bundle, OPT_LOOPBACK)) {
596 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.in,
597 NULL, NULL);
598 if (pri >= 0) {
599 n += sz - sizeof tun.data;
600 write(bundle->dev.fd, data, n);
601 log_Printf(LogDEBUG, "Looped back packet addressed to myself\n");
602 }
603 return;
604 } else
605 log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n");
606 }
607
608 /*
609 * Process on-demand dialup. Output packets are queued within the tunnel
610 * device until the appropriate NCP is opened.
611 */
612
613 if (bundle_Phase(bundle) == PHASE_DEAD) {
614 /*
615 * Note, we must be in AUTO mode :-/ otherwise our interface should
616 * *not* be UP and we can't receive data
617 */
618 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.dial,
619 NULL, NULL);
620 if (pri >= 0)
621 bundle_Open(bundle, NULL, PHYS_AUTO, 0);
622 else
623 /*
624 * Drop the packet. If we were to queue it, we'd just end up with
625 * a pile of timed-out data in our output queue by the time we get
626 * around to actually dialing. We'd also prematurely reach the
627 * threshold at which we stop select()ing to read() the tun
628 * device - breaking auto-dial.
629 */
630 return;
631 }
632
633 secs = 0;
634 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.out,
635 NULL, &secs);
636 if (pri >= 0) {
637 /* Prepend the number of seconds timeout given in the filter */
638 tun.header.timeout = secs;
639 ncp_Enqueue(&bundle->ncp, af, pri, (char *)&tun, n + sizeof tun.header);
640 }
641 }
642 }
643
644 static int
645 bundle_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle,
646 const fd_set *fdset)
647 {
648 struct datalink *dl;
649 int result = 0;
650
651 /* This is not actually necessary as struct mpserver doesn't Write() */
652 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset))
653 if (descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset) == 1)
654 result++;
655
656 for (dl = bundle->links; dl; dl = dl->next)
657 if (descriptor_IsSet(&dl->desc, fdset))
658 switch (descriptor_Write(&dl->desc, bundle, fdset)) {
659 case -1:
660 datalink_ComeDown(dl, CLOSE_NORMAL);
661 break;
662 case 1:
663 result++;
664 }
665
666 return result;
667 }
668
669 void
670 bundle_LockTun(struct bundle *bundle)
671 {
672 FILE *lockfile;
673 char pidfile[PATH_MAX];
674
675 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit);
676 lockfile = ID0fopen(pidfile, "w");
677 if (lockfile != NULL) {
678 fprintf(lockfile, "%d\n", (int)getpid());
679 fclose(lockfile);
680 }
681 #ifndef RELEASE_CRUNCH
682 else
683 log_Printf(LogERROR, "Warning: Can't create %s: %s\n",
684 pidfile, strerror(errno));
685 #endif
686 }
687
688 static void
689 bundle_UnlockTun(struct bundle *bundle)
690 {
691 char pidfile[PATH_MAX];
692
693 snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit);
694 ID0unlink(pidfile);
695 }
696
697 struct bundle *
698 bundle_Create(const char *prefix, int type, int unit)
699 {
700 static struct bundle bundle; /* there can be only one */
701 int enoentcount, err, minunit, maxunit;
702 const char *ifname;
703 #if defined(__DragonFly__) && !defined(NOKLDLOAD)
704 int kldtried;
705 #endif
706 #if defined(TUNSIFMODE) || defined(TUNSLMODE) || defined(TUNSIFHEAD)
707 int iff;
708 #endif
709
710 if (bundle.iface != NULL) { /* Already allocated ! */
711 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n");
712 return NULL;
713 }
714
715 if (unit == -1) {
716 minunit = 0;
717 maxunit = -1;
718 } else {
719 minunit = unit;
720 maxunit = unit + 1;
721 }
722 err = ENOENT;
723 enoentcount = 0;
724 #if defined(__DragonFly__) && !defined(NOKLDLOAD)
725 kldtried = 0;
726 #endif
727 for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) {
728 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d",
729 prefix, bundle.unit);
730 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR);
731 if (bundle.dev.fd >= 0)
732 break;
733 else if (errno == ENXIO || errno == ENOENT) {
734 #if defined(__DragonFly__) && !defined(NOKLDLOAD)
735 if (bundle.unit == minunit && !kldtried++) {
736 /*
737 * Attempt to load the tunnel interface KLD if it isn't loaded
738 * already.
739 */
740 if (loadmodules(LOAD_VERBOSLY, "if_tun", NULL))
741 bundle.unit--;
742 continue;
743 }
744 #endif
745 if (errno != ENOENT || ++enoentcount > 2) {
746 err = errno;
747 break;
748 }
749 } else
750 err = errno;
751 }
752
753 if (bundle.dev.fd < 0) {
754 if (unit == -1)
755 log_Printf(LogWARN, "No available tunnel devices found (%s)\n",
756 strerror(err));
757 else
758 log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err));
759 return NULL;
760 }
761
762 log_SetTun(bundle.unit);
763
764 ifname = strrchr(bundle.dev.Name, '/');
765 if (ifname == NULL)
766 ifname = bundle.dev.Name;
767 else
768 ifname++;
769
770 bundle.iface = iface_Create(ifname);
771 if (bundle.iface == NULL) {
772 close(bundle.dev.fd);
773 return NULL;
774 }
775
776 #ifdef TUNSIFMODE
777 /* Make sure we're POINTOPOINT & IFF_MULTICAST */
778 iff = IFF_POINTOPOINT | IFF_MULTICAST;
779 if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0)
780 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n",
781 strerror(errno));
782 #endif
783
784 #ifdef TUNSLMODE
785 /* Make sure we're not prepending sockaddrs */
786 iff = 0;
787 if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0)
788 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n",
789 strerror(errno));
790 #endif
791
792 #ifdef TUNSIFHEAD
793 /* We want the address family please ! */
794 iff = 1;
795 if (ID0ioctl(bundle.dev.fd, TUNSIFHEAD, &iff) < 0) {
796 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFHEAD): %s\n",
797 strerror(errno));
798 bundle.dev.header = 0;
799 } else
800 bundle.dev.header = 1;
801 #else
802 #ifdef __OpenBSD__
803 /* Always present for OpenBSD */
804 bundle.dev.header = 1;
805 #else
806 /*
807 * If TUNSIFHEAD isn't available and we're not OpenBSD, assume
808 * everything's AF_INET (hopefully the tun device won't pass us
809 * anything else !).
810 */
811 bundle.dev.header = 0;
812 #endif
813 #endif
814
815 log_Printf(LogPHASE, "Using interface: %s\n", ifname);
816
817 bundle.bandwidth = 0;
818 bundle.routing_seq = 0;
819 bundle.phase = PHASE_DEAD;
820 bundle.CleaningUp = 0;
821 bundle.NatEnabled = 0;
822
823 bundle.fsm.LayerStart = bundle_LayerStart;
824 bundle.fsm.LayerUp = bundle_LayerUp;
825 bundle.fsm.LayerDown = bundle_LayerDown;
826 bundle.fsm.LayerFinish = bundle_LayerFinish;
827 bundle.fsm.object = &bundle;
828
829 bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT;
830 bundle.cfg.idle.min_timeout = 0;
831 *bundle.cfg.auth.name = '\0';
832 *bundle.cfg.auth.key = '\0';
833 bundle.cfg.opt = OPT_IDCHECK | OPT_LOOPBACK | OPT_SROUTES | OPT_TCPMSSFIXUP |
834 OPT_THROUGHPUT | OPT_UTMP;
835 #ifndef NOINET6
836 bundle.cfg.opt |= OPT_IPCP;
837 if (probe.ipv6_available)
838 bundle.cfg.opt |= OPT_IPV6CP;
839 #endif
840 *bundle.cfg.label = '\0';
841 bundle.cfg.ifqueue = DEF_IFQUEUE;
842 bundle.cfg.choked.timeout = CHOKED_TIMEOUT;
843 bundle.phys_type.all = type;
844 bundle.phys_type.open = 0;
845 bundle.upat = 0;
846
847 bundle.links = datalink_Create("deflink", &bundle, type);
848 if (bundle.links == NULL) {
849 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno));
850 iface_Destroy(bundle.iface);
851 bundle.iface = NULL;
852 close(bundle.dev.fd);
853 return NULL;
854 }
855
856 bundle.desc.type = BUNDLE_DESCRIPTOR;
857 bundle.desc.UpdateSet = bundle_UpdateSet;
858 bundle.desc.IsSet = bundle_IsSet;
859 bundle.desc.Read = bundle_DescriptorRead;
860 bundle.desc.Write = bundle_DescriptorWrite;
861
862 ncp_Init(&bundle.ncp, &bundle);
863
864 memset(&bundle.filter, '\0', sizeof bundle.filter);
865 bundle.filter.in.fragok = bundle.filter.in.logok = 1;
866 bundle.filter.in.name = "IN";
867 bundle.filter.out.fragok = bundle.filter.out.logok = 1;
868 bundle.filter.out.name = "OUT";
869 bundle.filter.dial.name = "DIAL";
870 bundle.filter.dial.logok = 1;
871 bundle.filter.alive.name = "ALIVE";
872 bundle.filter.alive.logok = 1;
873 {
874 int i;
875 for (i = 0; i < MAXFILTERS; i++) {
876 bundle.filter.in.rule[i].f_action = A_NONE;
877 bundle.filter.out.rule[i].f_action = A_NONE;
878 bundle.filter.dial.rule[i].f_action = A_NONE;
879 bundle.filter.alive.rule[i].f_action = A_NONE;
880 }
881 }
882 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer);
883 bundle.idle.done = 0;
884 bundle.notify.fd = -1;
885 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer);
886 #ifndef NORADIUS
887 radius_Init(&bundle.radius);
888 #endif
889
890 /* Clean out any leftover crud */
891 iface_Clear(bundle.iface, &bundle.ncp, 0, IFACE_CLEAR_ALL);
892
893 bundle_LockTun(&bundle);
894
895 return &bundle;
896 }
897
898 static void
899 bundle_DownInterface(struct bundle *bundle)
900 {
901 route_IfDelete(bundle, 1);
902 iface_ClearFlags(bundle->iface->name, IFF_UP);
903 }
904
905 void
906 bundle_Destroy(struct bundle *bundle)
907 {
908 struct datalink *dl;
909
910 /*
911 * Clean up the interface. We don't really need to do the timer_Stop()s,
912 * mp_Down(), iface_Clear() and bundle_DownInterface() unless we're getting
913 * out under exceptional conditions such as a descriptor exception.
914 */
915 timer_Stop(&bundle->idle.timer);
916 timer_Stop(&bundle->choked.timer);
917 mp_Down(&bundle->ncp.mp);
918 iface_Clear(bundle->iface, &bundle->ncp, 0, IFACE_CLEAR_ALL);
919 bundle_DownInterface(bundle);
920
921 #ifndef NORADIUS
922 /* Tell the radius server the bad news */
923 radius_Destroy(&bundle->radius);
924 #endif
925
926 /* Again, these are all DATALINK_CLOSED unless we're abending */
927 dl = bundle->links;
928 while (dl)
929 dl = datalink_Destroy(dl);
930
931 ncp_Destroy(&bundle->ncp);
932
933 close(bundle->dev.fd);
934 bundle_UnlockTun(bundle);
935
936 /* In case we never made PHASE_NETWORK */
937 bundle_Notify(bundle, EX_ERRDEAD);
938
939 iface_Destroy(bundle->iface);
940 bundle->iface = NULL;
941 }
942
943 void
944 bundle_LinkClosed(struct bundle *bundle, struct datalink *dl)
945 {
946 /*
947 * Our datalink has closed.
948 * CleanDatalinks() (called from DoLoop()) will remove closed
949 * BACKGROUND, FOREGROUND and DIRECT links.
950 * If it's the last data link, enter phase DEAD.
951 *
952 * NOTE: dl may not be in our list (bundle_SendDatalink()) !
953 */
954
955 struct datalink *odl;
956 int other_links;
957
958 log_SetTtyCommandMode(dl);
959
960 other_links = 0;
961 for (odl = bundle->links; odl; odl = odl->next)
962 if (odl != dl && odl->state != DATALINK_CLOSED)
963 other_links++;
964
965 if (!other_links) {
966 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */
967 bundle_DownInterface(bundle);
968 ncp2initial(&bundle->ncp);
969 mp_Down(&bundle->ncp.mp);
970 bundle_NewPhase(bundle, PHASE_DEAD);
971 #ifndef NORADIUS
972 if (bundle->radius.sessiontime)
973 bundle_StopSessionTimer(bundle);
974 #endif
975 bundle_StopIdleTimer(bundle);
976 }
977 }
978
979 void
980 bundle_Open(struct bundle *bundle, const char *name, int mask, int force)
981 {
982 /*
983 * Please open the given datalink, or all if name == NULL
984 */
985 struct datalink *dl;
986
987 for (dl = bundle->links; dl; dl = dl->next)
988 if (name == NULL || !strcasecmp(dl->name, name)) {
989 if ((mask & dl->physical->type) &&
990 (dl->state == DATALINK_CLOSED ||
991 (force && dl->state == DATALINK_OPENING &&
992 dl->dial.timer.state == TIMER_RUNNING) ||
993 dl->state == DATALINK_READY)) {
994 timer_Stop(&dl->dial.timer); /* We're finished with this */
995 datalink_Up(dl, 1, 1);
996 if (mask & PHYS_AUTO)
997 break; /* Only one AUTO link at a time */
998 }
999 if (name != NULL)
1000 break;
1001 }
1002 }
1003
1004 struct datalink *
1005 bundle2datalink(struct bundle *bundle, const char *name)
1006 {
1007 struct datalink *dl;
1008
1009 if (name != NULL) {
1010 for (dl = bundle->links; dl; dl = dl->next)
1011 if (!strcasecmp(dl->name, name))
1012 return dl;
1013 } else if (bundle->links && !bundle->links->next)
1014 return bundle->links;
1015
1016 return NULL;
1017 }
1018
1019 int
1020 bundle_ShowLinks(struct cmdargs const *arg)
1021 {
1022 struct datalink *dl;
1023 struct pppThroughput *t;
1024 unsigned long long octets;
1025 int secs;
1026
1027 for (dl = arg->bundle->links; dl; dl = dl->next) {
1028 octets = MAX(dl->physical->link.stats.total.in.OctetsPerSecond,
1029 dl->physical->link.stats.total.out.OctetsPerSecond);
1030
1031 prompt_Printf(arg->prompt, "Name: %s [%s, %s]",
1032 dl->name, mode2Nam(dl->physical->type), datalink_State(dl));
1033 if (dl->physical->link.stats.total.rolling && dl->state == DATALINK_OPEN)
1034 prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)",
1035 dl->mp.bandwidth ? dl->mp.bandwidth :
1036 physical_GetSpeed(dl->physical),
1037 octets * 8, octets);
1038 prompt_Printf(arg->prompt, "\n");
1039 }
1040
1041 t = &arg->bundle->ncp.mp.link.stats.total;
1042 octets = MAX(t->in.OctetsPerSecond, t->out.OctetsPerSecond);
1043 secs = t->downtime ? 0 : throughput_uptime(t);
1044 if (secs > t->SamplePeriod)
1045 secs = t->SamplePeriod;
1046 if (secs)
1047 prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)"
1048 " over the last %d secs\n", octets * 8, octets, secs);
1049
1050 return 0;
1051 }
1052
1053 static const char *
1054 optval(struct bundle *bundle, int bit)
1055 {
1056 return (bundle->cfg.opt & bit) ? "enabled" : "disabled";
1057 }
1058
1059 int
1060 bundle_ShowStatus(struct cmdargs const *arg)
1061 {
1062 int remaining;
1063
1064 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle));
1065 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name);
1066 prompt_Printf(arg->prompt, " Interface: %s @ %lubps",
1067 arg->bundle->iface->name, arg->bundle->bandwidth);
1068
1069 if (arg->bundle->upat) {
1070 int secs = bundle_Uptime(arg->bundle);
1071
1072 prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600,
1073 (secs / 60) % 60, secs % 60);
1074 }
1075 prompt_Printf(arg->prompt, "\n Queued: %lu of %u\n",
1076 (unsigned long)ncp_QueueLen(&arg->bundle->ncp),
1077 arg->bundle->cfg.ifqueue);
1078
1079 prompt_Printf(arg->prompt, "\nDefaults:\n");
1080 prompt_Printf(arg->prompt, " Label: %s\n",
1081 arg->bundle->cfg.label);
1082 prompt_Printf(arg->prompt, " Auth name: %s\n",
1083 arg->bundle->cfg.auth.name);
1084 prompt_Printf(arg->prompt, " Diagnostic socket: ");
1085 if (*server.cfg.sockname != '\0') {
1086 prompt_Printf(arg->prompt, "%s", server.cfg.sockname);
1087 if (server.cfg.mask != (mode_t)-1)
1088 prompt_Printf(arg->prompt, ", mask 0%03o", (int)server.cfg.mask);
1089 prompt_Printf(arg->prompt, "%s\n", server.fd == -1 ? " (not open)" : "");
1090 } else if (server.cfg.port != 0)
1091 prompt_Printf(arg->prompt, "TCP port %d%s\n", server.cfg.port,
1092 server.fd == -1 ? " (not open)" : "");
1093 else
1094 prompt_Printf(arg->prompt, "none\n");
1095
1096 prompt_Printf(arg->prompt, " Choked Timer: %ds\n",
1097 arg->bundle->cfg.choked.timeout);
1098
1099 #ifndef NORADIUS
1100 radius_Show(&arg->bundle->radius, arg->prompt);
1101 #endif
1102
1103 prompt_Printf(arg->prompt, " Idle Timer: ");
1104 if (arg->bundle->cfg.idle.timeout) {
1105 prompt_Printf(arg->prompt, "%ds", arg->bundle->cfg.idle.timeout);
1106 if (arg->bundle->cfg.idle.min_timeout)
1107 prompt_Printf(arg->prompt, ", min %ds",
1108 arg->bundle->cfg.idle.min_timeout);
1109 remaining = bundle_RemainingIdleTime(arg->bundle);
1110 if (remaining != -1)
1111 prompt_Printf(arg->prompt, " (%ds remaining)", remaining);
1112 prompt_Printf(arg->prompt, "\n");
1113 } else
1114 prompt_Printf(arg->prompt, "disabled\n");
1115
1116 prompt_Printf(arg->prompt, " Filter Decap: %-20.20s",
1117 optval(arg->bundle, OPT_FILTERDECAP));
1118 prompt_Printf(arg->prompt, " ID check: %s\n",
1119 optval(arg->bundle, OPT_IDCHECK));
1120 prompt_Printf(arg->prompt, " Iface-Alias: %-20.20s",
1121 optval(arg->bundle, OPT_IFACEALIAS));
1122 #ifndef NOINET6
1123 prompt_Printf(arg->prompt, " IPCP: %s\n",
1124 optval(arg->bundle, OPT_IPCP));
1125 prompt_Printf(arg->prompt, " IPV6CP: %-20.20s",
1126 optval(arg->bundle, OPT_IPV6CP));
1127 #endif
1128 prompt_Printf(arg->prompt, " Keep-Session: %s\n",
1129 optval(arg->bundle, OPT_KEEPSESSION));
1130 prompt_Printf(arg->prompt, " Loopback: %-20.20s",
1131 optval(arg->bundle, OPT_LOOPBACK));
1132 prompt_Printf(arg->prompt, " PasswdAuth: %s\n",
1133 optval(arg->bundle, OPT_PASSWDAUTH));
1134 prompt_Printf(arg->prompt, " Proxy: %-20.20s",
1135 optval(arg->bundle, OPT_PROXY));
1136 prompt_Printf(arg->prompt, " Proxyall: %s\n",
1137 optval(arg->bundle, OPT_PROXYALL));
1138 prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s",
1139 optval(arg->bundle, OPT_SROUTES));
1140 prompt_Printf(arg->prompt, " TCPMSS Fixup: %s\n",
1141 optval(arg->bundle, OPT_TCPMSSFIXUP));
1142 prompt_Printf(arg->prompt, " Throughput: %-20.20s",
1143 optval(arg->bundle, OPT_THROUGHPUT));
1144 prompt_Printf(arg->prompt, " Utmp Logging: %s\n",
1145 optval(arg->bundle, OPT_UTMP));
1146
1147 return 0;
1148 }
1149
1150 static void
1151 bundle_IdleTimeout(void *v)
1152 {
1153 struct bundle *bundle = (struct bundle *)v;
1154
1155 log_Printf(LogPHASE, "Idle timer expired\n");
1156 bundle_StopIdleTimer(bundle);
1157 bundle_Close(bundle, NULL, CLOSE_STAYDOWN);
1158 }
1159
1160 /*
1161 * Start Idle timer. If timeout is reached, we call bundle_Close() to
1162 * close LCP and link.
1163 */
1164 void
1165 bundle_StartIdleTimer(struct bundle *bundle, unsigned secs)
1166 {
1167 timer_Stop(&bundle->idle.timer);
1168 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) !=
1169 bundle->phys_type.open && bundle->cfg.idle.timeout) {
1170 time_t now = time(NULL);
1171
1172 if (secs == 0)
1173 secs = bundle->cfg.idle.timeout;
1174
1175 /* We want at least `secs' */
1176 if (bundle->cfg.idle.min_timeout > secs && bundle->upat) {
1177 int up = now - bundle->upat;
1178
1179 if ((long long)bundle->cfg.idle.min_timeout - up > (long long)secs)
1180 /* Only increase from the current `remaining' value */
1181 secs = bundle->cfg.idle.min_timeout - up;
1182 }
1183 bundle->idle.timer.func = bundle_IdleTimeout;
1184 bundle->idle.timer.name = "idle";
1185 bundle->idle.timer.load = secs * SECTICKS;
1186 bundle->idle.timer.arg = bundle;
1187 timer_Start(&bundle->idle.timer);
1188 bundle->idle.done = now + secs;
1189 }
1190 }
1191
1192 void
1193 bundle_SetIdleTimer(struct bundle *bundle, int timeout, int min_timeout)
1194 {
1195 bundle->cfg.idle.timeout = timeout;
1196 if (min_timeout >= 0)
1197 bundle->cfg.idle.min_timeout = min_timeout;
1198 if (ncp_LayersOpen(&bundle->ncp))
1199 bundle_StartIdleTimer(bundle, 0);
1200 }
1201
1202 void
1203 bundle_StopIdleTimer(struct bundle *bundle)
1204 {
1205 timer_Stop(&bundle->idle.timer);
1206 bundle->idle.done = 0;
1207 }
1208
1209 static int
1210 bundle_RemainingIdleTime(struct bundle *bundle)
1211 {
1212 if (bundle->idle.done)
1213 return bundle->idle.done - time(NULL);
1214 return -1;
1215 }
1216
1217 #ifndef NORADIUS
1218
1219 static void
1220 bundle_SessionTimeout(void *v)
1221 {
1222 struct bundle *bundle = (struct bundle *)v;
1223
1224 log_Printf(LogPHASE, "Session-Timeout timer expired\n");
1225 bundle_StopSessionTimer(bundle);
1226 bundle_Close(bundle, NULL, CLOSE_STAYDOWN);
1227 }
1228
1229 void
1230 bundle_StartSessionTimer(struct bundle *bundle, unsigned secs)
1231 {
1232 timer_Stop(&bundle->session.timer);
1233 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) !=
1234 bundle->phys_type.open && bundle->radius.sessiontime) {
1235 time_t now = time(NULL);
1236
1237 if (secs == 0)
1238 secs = bundle->radius.sessiontime;
1239
1240 bundle->session.timer.func = bundle_SessionTimeout;
1241 bundle->session.timer.name = "session";
1242 bundle->session.timer.load = secs * SECTICKS;
1243 bundle->session.timer.arg = bundle;
1244 timer_Start(&bundle->session.timer);
1245 bundle->session.done = now + secs;
1246 }
1247 }
1248
1249 void
1250 bundle_StopSessionTimer(struct bundle *bundle)
1251 {
1252 timer_Stop(&bundle->session.timer);
1253 bundle->session.done = 0;
1254 }
1255
1256 #endif
1257
1258 int
1259 bundle_IsDead(struct bundle *bundle)
1260 {
1261 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp);
1262 }
1263
1264 static struct datalink *
1265 bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl)
1266 {
1267 struct datalink **dlp;
1268
1269 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next)
1270 if (*dlp == dl) {
1271 *dlp = dl->next;
1272 dl->next = NULL;
1273 bundle_LinksRemoved(bundle);
1274 return dl;
1275 }
1276
1277 return NULL;
1278 }
1279
1280 static void
1281 bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl)
1282 {
1283 struct datalink **dlp = &bundle->links;
1284
1285 while (*dlp)
1286 dlp = &(*dlp)->next;
1287
1288 *dlp = dl;
1289 dl->next = NULL;
1290
1291 bundle_LinkAdded(bundle, dl);
1292 mp_CheckAutoloadTimer(&bundle->ncp.mp);
1293 }
1294
1295 void
1296 bundle_CleanDatalinks(struct bundle *bundle)
1297 {
1298 struct datalink **dlp = &bundle->links;
1299 int found = 0;
1300
1301 while (*dlp)
1302 if ((*dlp)->state == DATALINK_CLOSED &&
1303 (*dlp)->physical->type &
1304 (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) {
1305 *dlp = datalink_Destroy(*dlp);
1306 found++;
1307 } else
1308 dlp = &(*dlp)->next;
1309
1310 if (found)
1311 bundle_LinksRemoved(bundle);
1312 }
1313
1314 int
1315 bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl,
1316 const char *name)
1317 {
1318 if (bundle2datalink(bundle, name)) {
1319 log_Printf(LogWARN, "Clone: %s: name already exists\n", name);
1320 return 0;
1321 }
1322
1323 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name));
1324 return 1;
1325 }
1326
1327 void
1328 bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl)
1329 {
1330 dl = bundle_DatalinkLinkout(bundle, dl);
1331 if (dl)
1332 datalink_Destroy(dl);
1333 }
1334
1335 void
1336 bundle_SetLabel(struct bundle *bundle, const char *label)
1337 {
1338 if (label)
1339 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1);
1340 else
1341 *bundle->cfg.label = '\0';
1342 }
1343
1344 const char *
1345 bundle_GetLabel(struct bundle *bundle)
1346 {
1347 return *bundle->cfg.label ? bundle->cfg.label : NULL;
1348 }
1349
1350 int
1351 bundle_LinkSize(void)
1352 {
1353 struct iovec iov[SCATTER_SEGMENTS];
1354 int niov, expect, f;
1355
1356 iov[0].iov_len = strlen(Version) + 1;
1357 iov[0].iov_base = NULL;
1358 niov = 1;
1359 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) {
1360 log_Printf(LogERROR, "Cannot determine space required for link\n");
1361 return 0;
1362 }
1363
1364 for (f = expect = 0; f < niov; f++)
1365 expect += iov[f].iov_len;
1366
1367 return expect;
1368 }
1369
1370 void
1371 bundle_ReceiveDatalink(struct bundle *bundle, int s)
1372 {
1373 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD];
1374 int niov, expect, f, *fd, nfd, onfd, got;
1375 struct iovec iov[SCATTER_SEGMENTS];
1376 struct cmsghdr *cmsg;
1377 struct msghdr msg;
1378 struct datalink *dl;
1379 pid_t pid;
1380
1381 log_Printf(LogPHASE, "Receiving datalink\n");
1382
1383 /*
1384 * Create our scatter/gather array - passing NULL gets the space
1385 * allocation requirement rather than actually flattening the
1386 * structures.
1387 */
1388 iov[0].iov_len = strlen(Version) + 1;
1389 iov[0].iov_base = NULL;
1390 niov = 1;
1391 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) {
1392 log_Printf(LogERROR, "Cannot determine space required for link\n");
1393 return;
1394 }
1395
1396 /* Allocate the scatter/gather array for recvmsg() */
1397 for (f = expect = 0; f < niov; f++) {
1398 if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) {
1399 log_Printf(LogERROR, "Cannot allocate space to receive link\n");
1400 return;
1401 }
1402 if (f)
1403 expect += iov[f].iov_len;
1404 }
1405
1406 /* Set up our message */
1407 cmsg = (struct cmsghdr *)cmsgbuf;
1408 cmsg->cmsg_len = sizeof cmsgbuf;
1409 cmsg->cmsg_level = SOL_SOCKET;
1410 cmsg->cmsg_type = 0;
1411
1412 memset(&msg, '\0', sizeof msg);
1413 msg.msg_name = NULL;
1414 msg.msg_namelen = 0;
1415 msg.msg_iov = iov;
1416 msg.msg_iovlen = 1; /* Only send the version at the first pass */
1417 msg.msg_control = cmsgbuf;
1418 msg.msg_controllen = sizeof cmsgbuf;
1419
1420 log_Printf(LogDEBUG, "Expecting %u scatter/gather bytes\n",
1421 (unsigned)iov[0].iov_len);
1422
1423 if ((got = recvmsg(s, &msg, MSG_WAITALL)) != iov[0].iov_len) {
1424 if (got == -1)
1425 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno));
1426 else
1427 log_Printf(LogERROR, "Failed recvmsg: Got %d, not %u\n",
1428 got, (unsigned)iov[0].iov_len);
1429 while (niov--)
1430 free(iov[niov].iov_base);
1431 return;
1432 }
1433
1434 if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
1435 log_Printf(LogERROR, "Recvmsg: no descriptors received !\n");
1436 while (niov--)
1437 free(iov[niov].iov_base);
1438 return;
1439 }
1440
1441 fd = (int *)CMSG_DATA(cmsg);
1442 nfd = ((caddr_t)cmsg + cmsg->cmsg_len - (caddr_t)fd) / sizeof(int);
1443
1444 if (nfd < 2) {
1445 log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n",
1446 nfd, nfd == 1 ? "" : "s");
1447 while (nfd--)
1448 close(fd[nfd]);
1449 while (niov--)
1450 free(iov[niov].iov_base);
1451 return;
1452 }
1453
1454 /*
1455 * We've successfully received two or more open file descriptors
1456 * through our socket, plus a version string. Make sure it's the
1457 * correct version, and drop the connection if it's not.
1458 */
1459 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) {
1460 log_Printf(LogWARN, "Cannot receive datalink, incorrect version"
1461 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len,
1462 (char *)iov[0].iov_base, Version);
1463 while (nfd--)
1464 close(fd[nfd]);
1465 while (niov--)
1466 free(iov[niov].iov_base);
1467 return;
1468 }
1469
1470 /*
1471 * Everything looks good. Send the other side our process id so that
1472 * they can transfer lock ownership, and wait for them to send the
1473 * actual link data.
1474 */
1475 pid = getpid();
1476 if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) {
1477 if (got == -1)
1478 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno));
1479 else
1480 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got,
1481 (int)(sizeof pid));
1482 while (nfd--)
1483 close(fd[nfd]);
1484 while (niov--)
1485 free(iov[niov].iov_base);
1486 return;
1487 }
1488
1489 if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) {
1490 if (got == -1)
1491 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno));
1492 else
1493 log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, expect);
1494 while (nfd--)
1495 close(fd[nfd]);
1496 while (niov--)
1497 free(iov[niov].iov_base);
1498 return;
1499 }
1500 close(fd[1]);
1501
1502 onfd = nfd; /* We've got this many in our array */
1503 nfd -= 2; /* Don't include p->fd and our reply descriptor */
1504 niov = 1; /* Skip the version id */
1505 dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, fd[0],
1506 fd + 2, &nfd);
1507 if (dl) {
1508
1509 if (nfd) {
1510 log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d "
1511 "auxiliary file descriptors (%d remain)\n", onfd, nfd);
1512 datalink_Destroy(dl);
1513 while (nfd--)
1514 close(fd[onfd--]);
1515 close(fd[0]);
1516 } else {
1517 bundle_DatalinkLinkin(bundle, dl);
1518 datalink_AuthOk(dl);
1519 bundle_CalculateBandwidth(dl->bundle);
1520 }
1521 } else {
1522 while (nfd--)
1523 close(fd[onfd--]);
1524 close(fd[0]);
1525 close(fd[1]);
1526 }
1527
1528 free(iov[0].iov_base);
1529 }
1530
1531 void
1532 bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun)
1533 {
1534 char cmsgbuf[CMSG_SPACE(sizeof(int) * SEND_MAXFD)];
1535 const char *constlock;
1536 char *lock;
1537 struct cmsghdr *cmsg;
1538 struct msghdr msg;
1539 struct iovec iov[SCATTER_SEGMENTS];
1540 int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2], got;
1541 pid_t newpid;
1542
1543 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name);
1544
1545 /* Record the base device name for a lock transfer later */
1546 constlock = physical_LockedDevice(dl->physical);
1547 if (constlock) {
1548 lock = alloca(strlen(constlock) + 1);
1549 strcpy(lock, constlock);
1550 } else
1551 lock = NULL;
1552
1553 bundle_LinkClosed(dl->bundle, dl);
1554 bundle_DatalinkLinkout(dl->bundle, dl);
1555
1556 /* Build our scatter/gather array */
1557 iov[0].iov_len = strlen(Version) + 1;
1558 iov[0].iov_base = strdup(Version);
1559 niov = 1;
1560 nfd = 0;
1561
1562 fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd);
1563
1564 if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) {
1565 /*
1566 * fd[1] is used to get the peer process id back, then to confirm that
1567 * we've transferred any device locks to that process id.
1568 */
1569 fd[1] = reply[1];
1570
1571 nfd += 2; /* Include fd[0] and fd[1] */
1572 memset(&msg, '\0', sizeof msg);
1573
1574 msg.msg_name = NULL;
1575 msg.msg_namelen = 0;
1576 /*
1577 * Only send the version to start... We used to send the whole lot, but
1578 * this caused problems with our RECVBUF size as a single link is about
1579 * 22k ! This way, we should bump into no limits.
1580 */
1581 msg.msg_iovlen = 1;
1582 msg.msg_iov = iov;
1583 msg.msg_control = cmsgbuf;
1584 msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfd);
1585 msg.msg_flags = 0;
1586
1587 cmsg = (struct cmsghdr *)cmsgbuf;
1588 cmsg->cmsg_len = msg.msg_controllen;
1589 cmsg->cmsg_level = SOL_SOCKET;
1590 cmsg->cmsg_type = SCM_RIGHTS;
1591
1592 for (f = 0; f < nfd; f++)
1593 *((int *)CMSG_DATA(cmsg) + f) = fd[f];
1594
1595 for (f = 1, expect = 0; f < niov; f++)
1596 expect += iov[f].iov_len;
1597
1598 if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1)
1599 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect,
1600 strerror(errno));
1601 if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1)
1602 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect,
1603 strerror(errno));
1604
1605 log_Printf(LogDEBUG, "Sending %d descriptor%s and %u bytes in scatter"
1606 "/gather array\n", nfd, nfd == 1 ? "" : "s",
1607 (unsigned)iov[0].iov_len);
1608
1609 if ((got = sendmsg(s, &msg, 0)) == -1)
1610 log_Printf(LogERROR, "Failed sendmsg: %s: %s\n",
1611 sun->sun_path, strerror(errno));
1612 else if (got != iov[0].iov_len)
1613 log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %d of %u\n",
1614 sun->sun_path, got, (unsigned)iov[0].iov_len);
1615 else {
1616 /* We must get the ACK before closing the descriptor ! */
1617 int res;
1618
1619 if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) {
1620 log_Printf(LogDEBUG, "Received confirmation from pid %ld\n",
1621 (long)newpid);
1622 if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK)
1623 log_Printf(LogERROR, "uu_lock_txfr: %s\n", uu_lockerr(res));
1624
1625 log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect);
1626 if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) {
1627 if (got == -1)
1628 log_Printf(LogERROR, "%s: Failed writev: %s\n",
1629 sun->sun_path, strerror(errno));
1630 else
1631 log_Printf(LogERROR, "%s: Failed writev: Wrote %d of %d\n",
1632 sun->sun_path, got, expect);
1633 }
1634 } else if (got == -1)
1635 log_Printf(LogERROR, "%s: Failed socketpair read: %s\n",
1636 sun->sun_path, strerror(errno));
1637 else
1638 log_Printf(LogERROR, "%s: Failed socketpair read: Got %d of %d\n",
1639 sun->sun_path, got, (int)(sizeof newpid));
1640 }
1641
1642 close(reply[0]);
1643 close(reply[1]);
1644
1645 newsid = Enabled(dl->bundle, OPT_KEEPSESSION) ||
1646 tcgetpgrp(fd[0]) == getpgrp();
1647 while (nfd)
1648 close(fd[--nfd]);
1649 if (newsid)
1650 bundle_setsid(dl->bundle, got != -1);
1651 }
1652 close(s);
1653
1654 while (niov--)
1655 free(iov[niov].iov_base);
1656 }
1657
1658 int
1659 bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl,
1660 const char *name)
1661 {
1662 struct datalink *dl;
1663
1664 if (!strcasecmp(ndl->name, name))
1665 return 1;
1666
1667 for (dl = bundle->links; dl; dl = dl->next)
1668 if (!strcasecmp(dl->name, name))
1669 return 0;
1670
1671 datalink_Rename(ndl, name);
1672 return 1;
1673 }
1674
1675 int
1676 bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode)
1677 {
1678 int omode;
1679
1680 omode = dl->physical->type;
1681 if (omode == mode)
1682 return 1;
1683
1684 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO))
1685 /* First auto link */
1686 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) {
1687 log_Printf(LogWARN, "You must `set ifaddr' or `open' before"
1688 " changing mode to %s\n", mode2Nam(mode));
1689 return 0;
1690 }
1691
1692 if (!datalink_SetMode(dl, mode))
1693 return 0;
1694
1695 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) &&
1696 bundle->phase != PHASE_NETWORK)
1697 /* First auto link, we need an interface */
1698 ipcp_InterfaceUp(&bundle->ncp.ipcp);
1699
1700 /* Regenerate phys_type and adjust idle timer */
1701 bundle_LinksRemoved(bundle);
1702
1703 return 1;
1704 }
1705
1706 void
1707 bundle_setsid(struct bundle *bundle, int holdsession)
1708 {
1709 /*
1710 * Lose the current session. This means getting rid of our pid
1711 * too so that the tty device will really go away, and any getty
1712 * etc will be allowed to restart.
1713 */
1714 pid_t pid, orig;
1715 int fds[2];
1716 char done;
1717 struct datalink *dl;
1718
1719 if (!holdsession && bundle_IsDead(bundle)) {
1720 /*
1721 * No need to lose our session after all... we're going away anyway
1722 *
1723 * We should really stop the timer and pause if holdsession is set and
1724 * the bundle's dead, but that leaves other resources lying about :-(
1725 */
1726 return;
1727 }
1728
1729 orig = getpid();
1730 if (pipe(fds) == -1) {
1731 log_Printf(LogERROR, "pipe: %s\n", strerror(errno));
1732 return;
1733 }
1734 switch ((pid = fork())) {
1735 case -1:
1736 log_Printf(LogERROR, "fork: %s\n", strerror(errno));
1737 close(fds[0]);
1738 close(fds[1]);
1739 return;
1740 case 0:
1741 close(fds[1]);
1742 read(fds[0], &done, 1); /* uu_locks are mine ! */
1743 close(fds[0]);
1744 if (pipe(fds) == -1) {
1745 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno));
1746 return;
1747 }
1748 switch ((pid = fork())) {
1749 case -1:
1750 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno));
1751 close(fds[0]);
1752 close(fds[1]);
1753 return;
1754 case 0:
1755 close(fds[1]);
1756 bundle_LockTun(bundle); /* update pid */
1757 read(fds[0], &done, 1); /* uu_locks are mine ! */
1758 close(fds[0]);
1759 setsid();
1760 bundle_ChangedPID(bundle);
1761 log_Printf(LogDEBUG, "%ld -> %ld: %s session control\n",
1762 (long)orig, (long)getpid(),
1763 holdsession ? "Passed" : "Dropped");
1764 timer_InitService(0); /* Start the Timer Service */
1765 break;
1766 default:
1767 close(fds[0]);
1768 /* Give away all our physical locks (to the final process) */
1769 for (dl = bundle->links; dl; dl = dl->next)
1770 if (dl->state != DATALINK_CLOSED)
1771 physical_ChangedPid(dl->physical, pid);
1772 write(fds[1], "!", 1); /* done */
1773 close(fds[1]);
1774 _exit(0);
1775 break;
1776 }
1777 break;
1778 default:
1779 close(fds[0]);
1780 /* Give away all our physical locks (to the intermediate process) */
1781 for (dl = bundle->links; dl; dl = dl->next)
1782 if (dl->state != DATALINK_CLOSED)
1783 physical_ChangedPid(dl->physical, pid);
1784 write(fds[1], "!", 1); /* done */
1785 close(fds[1]);
1786 if (holdsession) {
1787 int fd, status;
1788
1789 timer_TermService();
1790 signal(SIGPIPE, SIG_DFL);
1791 signal(SIGALRM, SIG_DFL);
1792 signal(SIGHUP, SIG_DFL);
1793 signal(SIGTERM, SIG_DFL);
1794 signal(SIGINT, SIG_DFL);
1795 signal(SIGQUIT, SIG_DFL);
1796 for (fd = getdtablesize(); fd >= 0; fd--)
1797 close(fd);
1798 /*
1799 * Reap the intermediate process. As we're not exiting but the
1800 * intermediate is, we don't want it to become defunct.
1801 */
1802 waitpid(pid, &status, 0);
1803 /* Tweak our process arguments.... */
1804 SetTitle("session owner");
1805 #ifndef NOSUID
1806 setuid(ID0realuid());
1807 #endif
1808 /*
1809 * Hang around for a HUP. This should happen as soon as the
1810 * ppp that we passed our ctty descriptor to closes it.
1811 * NOTE: If this process dies, the passed descriptor becomes
1812 * invalid and will give a select() error by setting one
1813 * of the error fds, aborting the other ppp. We don't
1814 * want that to happen !
1815 */
1816 pause();
1817 }
1818 _exit(0);
1819 break;
1820 }
1821 }
1822
1823 int
1824 bundle_HighestState(struct bundle *bundle)
1825 {
1826 struct datalink *dl;
1827 int result = DATALINK_CLOSED;
1828
1829 for (dl = bundle->links; dl; dl = dl->next)
1830 if (result < dl->state)
1831 result = dl->state;
1832
1833 return result;
1834 }
1835
1836 int
1837 bundle_Exception(struct bundle *bundle, int fd)
1838 {
1839 struct datalink *dl;
1840
1841 for (dl = bundle->links; dl; dl = dl->next)
1842 if (dl->physical->fd == fd) {
1843 datalink_Down(dl, CLOSE_NORMAL);
1844 return 1;
1845 }
1846
1847 return 0;
1848 }
1849
1850 void
1851 bundle_AdjustFilters(struct bundle *bundle, struct ncpaddr *local,
1852 struct ncpaddr *remote)
1853 {
1854 filter_AdjustAddr(&bundle->filter.in, local, remote, NULL);
1855 filter_AdjustAddr(&bundle->filter.out, local, remote, NULL);
1856 filter_AdjustAddr(&bundle->filter.dial, local, remote, NULL);
1857 filter_AdjustAddr(&bundle->filter.alive, local, remote, NULL);
1858 }
1859
1860 void
1861 bundle_AdjustDNS(struct bundle *bundle)
1862 {
1863 struct in_addr *dns = bundle->ncp.ipcp.ns.dns;
1864
1865 filter_AdjustAddr(&bundle->filter.in, NULL, NULL, dns);
1866 filter_AdjustAddr(&bundle->filter.out, NULL, NULL, dns);
1867 filter_AdjustAddr(&bundle->filter.dial, NULL, NULL, dns);
1868 filter_AdjustAddr(&bundle->filter.alive, NULL, NULL, dns);
1869 }
1870
1871 void
1872 bundle_CalculateBandwidth(struct bundle *bundle)
1873 {
1874 struct datalink *dl;
1875 int sp, overhead, maxoverhead;
1876
1877 bundle->bandwidth = 0;
1878 bundle->iface->mtu = 0;
1879 maxoverhead = 0;
1880
1881 for (dl = bundle->links; dl; dl = dl->next) {
1882 overhead = ccp_MTUOverhead(&dl->physical->link.ccp);
1883 if (maxoverhead < overhead)
1884 maxoverhead = overhead;
1885 if (dl->state == DATALINK_OPEN) {
1886 if ((sp = dl->mp.bandwidth) == 0 &&
1887 (sp = physical_GetSpeed(dl->physical)) == 0)
1888 log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n",
1889 dl->name, dl->physical->name.full);
1890 else
1891 bundle->bandwidth += sp;
1892 if (!bundle->ncp.mp.active) {
1893 bundle->iface->mtu = dl->physical->link.lcp.his_mru;
1894 break;
1895 }
1896 }
1897 }
1898
1899 if (bundle->bandwidth == 0)
1900 bundle->bandwidth = 115200; /* Shrug */
1901
1902 if (bundle->ncp.mp.active) {
1903 bundle->iface->mtu = bundle->ncp.mp.peer_mrru;
1904 overhead = ccp_MTUOverhead(&bundle->ncp.mp.link.ccp);
1905 if (maxoverhead < overhead)
1906 maxoverhead = overhead;
1907 } else if (!bundle->iface->mtu)
1908 bundle->iface->mtu = DEF_MRU;
1909
1910 #ifndef NORADIUS
1911 if (bundle->radius.valid && bundle->radius.mtu &&
1912 bundle->radius.mtu < bundle->iface->mtu) {
1913 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n",
1914 bundle->radius.mtu);
1915 bundle->iface->mtu = bundle->radius.mtu;
1916 }
1917 #endif
1918
1919 if (maxoverhead) {
1920 log_Printf(LogLCP, "Reducing MTU from %d to %d (CCP requirement)\n",
1921 bundle->iface->mtu, bundle->iface->mtu - maxoverhead);
1922 bundle->iface->mtu -= maxoverhead;
1923 }
1924
1925 tun_configure(bundle);
1926
1927 route_UpdateMTU(bundle);
1928 }
1929
1930 void
1931 bundle_AutoAdjust(struct bundle *bundle, int percent, int what)
1932 {
1933 struct datalink *dl, *choice, *otherlinkup;
1934
1935 choice = otherlinkup = NULL;
1936 for (dl = bundle->links; dl; dl = dl->next)
1937 if (dl->physical->type == PHYS_AUTO) {
1938 if (dl->state == DATALINK_OPEN) {
1939 if (what == AUTO_DOWN) {
1940 if (choice)
1941 otherlinkup = choice;
1942 choice = dl;
1943 }
1944 } else if (dl->state == DATALINK_CLOSED) {
1945 if (what == AUTO_UP) {
1946 choice = dl;
1947 break;
1948 }
1949 } else {
1950 /* An auto link in an intermediate state - forget it for the moment */
1951 choice = NULL;
1952 break;
1953 }
1954 } else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN)
1955 otherlinkup = dl;
1956
1957 if (choice) {
1958 if (what == AUTO_UP) {
1959 log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n",
1960 percent, choice->name);
1961 datalink_Up(choice, 1, 1);
1962 mp_CheckAutoloadTimer(&bundle->ncp.mp);
1963 } else if (otherlinkup) { /* Only bring the second-last link down */
1964 log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n",
1965 percent, choice->name);
1966 datalink_Close(choice, CLOSE_STAYDOWN);
1967 mp_CheckAutoloadTimer(&bundle->ncp.mp);
1968 }
1969 }
1970 }
1971
1972 int
1973 bundle_WantAutoloadTimer(struct bundle *bundle)
1974 {
1975 struct datalink *dl;
1976 int autolink, opened;
1977
1978 if (bundle->phase == PHASE_NETWORK) {
1979 for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next)
1980 if (dl->physical->type == PHYS_AUTO) {
1981 if (++autolink == 2 || (autolink == 1 && opened))
1982 /* Two auto links or one auto and one open in NETWORK phase */
1983 return 1;
1984 } else if (dl->state == DATALINK_OPEN) {
1985 opened++;
1986 if (autolink)
1987 /* One auto and one open link in NETWORK phase */
1988 return 1;
1989 }
1990 }
1991
1992 return 0;
1993 }
1994
1995 void
1996 bundle_ChangedPID(struct bundle *bundle)
1997 {
1998 #ifdef TUNSIFPID
1999 ioctl(bundle->dev.fd, TUNSIFPID, 0);
2000 #endif
2001 }
2002
2003 int
2004 bundle_Uptime(struct bundle *bundle)
2005 {
2006 if (bundle->upat)
2007 return time(NULL) - bundle->upat;
2008
2009 return 0;
2010 }
DragonFly BSD