datalink.c revision 48003 
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: datalink.c,v 1.40 1999/06/10 09:06:30 brian Exp $
27 */
28
29#include <sys/param.h>
30#include <netinet/in.h>
31#include <netinet/in_systm.h>
32#include <netinet/ip.h>
33#include <sys/un.h>
34
35#include <ctype.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <sys/uio.h>
40#include <termios.h>
41
42#include "layer.h"
43#include "mbuf.h"
44#include "log.h"
45#include "defs.h"
46#include "timer.h"
47#include "fsm.h"
48#include "lcp.h"
49#include "descriptor.h"
50#include "lqr.h"
51#include "hdlc.h"
52#include "async.h"
53#include "throughput.h"
54#include "ccp.h"
55#include "link.h"
56#include "physical.h"
57#include "iplist.h"
58#include "slcompress.h"
59#include "ipcp.h"
60#include "filter.h"
61#include "mp.h"
62#ifndef NORADIUS
63#include "radius.h"
64#endif
65#include "bundle.h"
66#include "chat.h"
67#include "auth.h"
68#include "prompt.h"
69#include "proto.h"
70#include "pap.h"
71#include "chap.h"
72#include "command.h"
73#include "cbcp.h"
74#include "datalink.h"
75
76static void datalink_LoginDone(struct datalink *);
77static void datalink_NewState(struct datalink *, int);
78
79static void
80datalink_OpenTimeout(void *v)
81{
82  struct datalink *dl = (struct datalink *)v;
83
84  timer_Stop(&dl->dial.timer);
85  if (dl->state == DATALINK_OPENING)
86    log_Printf(LogPHASE, "%s: Redial timer expired.\n", dl->name);
87}
88
89static int
90datalink_StartDialTimer(struct datalink *dl, int Timeout)
91{
92  int result = Timeout;
93
94  timer_Stop(&dl->dial.timer);
95  if (Timeout) {
96    if (Timeout > 0)
97      dl->dial.timer.load = Timeout * SECTICKS;
98    else {
99      result = (random() % DIAL_TIMEOUT) + 1;
100      dl->dial.timer.load = result * SECTICKS;
101    }
102    dl->dial.timer.func = datalink_OpenTimeout;
103    dl->dial.timer.name = "dial";
104    dl->dial.timer.arg = dl;
105    timer_Start(&dl->dial.timer);
106    if (dl->state == DATALINK_OPENING)
107      log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
108                dl->name, Timeout);
109  }
110  return result;
111}
112
113static void
114datalink_HangupDone(struct datalink *dl)
115{
116  if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
117      dl->physical->fd != -1) {
118    /* Don't close our device if the link is dedicated */
119    datalink_LoginDone(dl);
120    return;
121  }
122
123  physical_Close(dl->physical);
124  dl->phone.chosen = "N/A";
125
126  if (dl->cbcp.required) {
127    log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
128    dl->cfg.callback.opmask = 0;
129    strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
130            sizeof dl->cfg.phone.list - 1);
131    dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
132    dl->phone.alt = dl->phone.next = NULL;
133    dl->reconnect_tries = dl->cfg.reconnect.max;
134    dl->dial.tries = dl->cfg.dial.max;
135    dl->dial.incs = 0;
136    dl->script.run = 1;
137    dl->script.packetmode = 1;
138    if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
139      log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
140    bundle_LinksRemoved(dl->bundle);
141    /* if dial.timeout is < 0 (random), we don't override fsm.delay */
142    if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
143      dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
144    datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
145    cbcp_Down(&dl->cbcp);
146    datalink_NewState(dl, DATALINK_OPENING);
147    if (bundle_Phase(dl->bundle) != PHASE_TERMINATE)
148      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
149  } else if (dl->bundle->CleaningUp ||
150      (dl->physical->type == PHYS_DIRECT) ||
151      ((!dl->dial.tries || (dl->dial.tries < 0 && !dl->reconnect_tries)) &&
152       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
153    datalink_NewState(dl, DATALINK_CLOSED);
154    dl->dial.tries = -1;
155    dl->dial.incs = 0;
156    dl->reconnect_tries = 0;
157    bundle_LinkClosed(dl->bundle, dl);
158    if (!dl->bundle->CleaningUp)
159      datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
160  } else {
161    datalink_NewState(dl, DATALINK_OPENING);
162    if (bundle_Phase(dl->bundle) != PHASE_TERMINATE)
163      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
164    if (dl->dial.tries < 0) {
165      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
166      dl->dial.tries = dl->cfg.dial.max;
167      dl->dial.incs = 0;
168      dl->reconnect_tries--;
169    } else {
170      if (dl->phone.next == NULL)
171        datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
172      else
173        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
174    }
175  }
176}
177
178static const char *
179datalink_ChoosePhoneNumber(struct datalink *dl)
180{
181  char *phone;
182
183  if (dl->phone.alt == NULL) {
184    if (dl->phone.next == NULL) {
185      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
186      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
187      if (*dl->phone.list == '\0')
188        return "";
189      dl->phone.next = dl->phone.list;
190    }
191    dl->phone.alt = strsep(&dl->phone.next, ":");
192  }
193  phone = strsep(&dl->phone.alt, "|");
194  dl->phone.chosen = *phone ? phone : "[NONE]";
195  if (*phone)
196    log_Printf(LogPHASE, "Phone: %s\n", phone);
197  return phone;
198}
199
200static void
201datalink_LoginDone(struct datalink *dl)
202{
203  if (!dl->script.packetmode) {
204    dl->dial.tries = -1;
205    dl->dial.incs = 0;
206    datalink_NewState(dl, DATALINK_READY);
207  } else if (!physical_Raw(dl->physical)) {
208    dl->dial.tries = 0;
209    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
210    if (dl->script.run) {
211      datalink_NewState(dl, DATALINK_HANGUP);
212      physical_Offline(dl->physical);
213      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
214    } else {
215      physical_StopDeviceTimer(dl->physical);
216      if (dl->physical->type == PHYS_DEDICATED)
217        /* force a redial timeout */
218        physical_Close(dl->physical);
219      datalink_HangupDone(dl);
220    }
221  } else {
222    dl->dial.tries = -1;
223    dl->dial.incs = 0;
224
225    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
226    async_Init(&dl->physical->async);
227
228    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
229              0 : dl->physical->link.lcp.cfg.openmode);
230    ccp_Setup(&dl->physical->link.ccp);
231
232    datalink_NewState(dl, DATALINK_LCP);
233    fsm_Up(&dl->physical->link.lcp.fsm);
234    fsm_Open(&dl->physical->link.lcp.fsm);
235  }
236}
237
238static int
239datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
240                   int *n)
241{
242  struct datalink *dl = descriptor2datalink(d);
243  int result;
244
245  result = 0;
246  switch (dl->state) {
247    case DATALINK_CLOSED:
248      if ((dl->physical->type &
249           (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|PHYS_DDIAL)) &&
250          !dl->bundle->CleaningUp)
251        /*
252         * Our first time in - DEDICATED & DDIAL never come down, and
253         * DIRECT & BACKGROUND get deleted when they enter DATALINK_CLOSED.
254         * Go to DATALINK_OPENING via datalink_Up() and fall through.
255         */
256        datalink_Up(dl, 1, 1);
257      else
258        break;
259      /* fall through */
260
261    case DATALINK_OPENING:
262      if (dl->dial.timer.state != TIMER_RUNNING) {
263        if (--dl->dial.tries < 0)
264          dl->dial.tries = 0;
265        if (physical_Open(dl->physical, dl->bundle) >= 0) {
266          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
267                           "Type `~?' for help\r\n", dl->name,
268                           dl->physical->name.full);
269          if (dl->script.run) {
270            datalink_NewState(dl, DATALINK_DIAL);
271            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial, 1,
272                      datalink_ChoosePhoneNumber(dl));
273            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
274                dl->cfg.dial.max)
275              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
276                        dl->name, dl->cfg.dial.max - dl->dial.tries,
277                        dl->cfg.dial.max);
278          } else
279            datalink_LoginDone(dl);
280          return datalink_UpdateSet(d, r, w, e, n);
281        } else {
282          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
283              dl->cfg.dial.max)
284            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
285                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
286          else
287            log_Printf(LogCHAT, "Failed to open device\n");
288
289          if (dl->bundle->CleaningUp ||
290              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
291               dl->cfg.dial.max && dl->dial.tries == 0)) {
292            datalink_NewState(dl, DATALINK_CLOSED);
293            dl->reconnect_tries = 0;
294            dl->dial.tries = -1;
295            log_WritePrompts(dl, "Failed to open %s\n",
296                             dl->physical->name.full);
297            bundle_LinkClosed(dl->bundle, dl);
298          }
299          if (!dl->bundle->CleaningUp) {
300            int timeout;
301
302            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
303            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
304                             dl->physical->name.full, timeout);
305          }
306        }
307      }
308      break;
309
310    case DATALINK_HANGUP:
311    case DATALINK_DIAL:
312    case DATALINK_LOGIN:
313      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
314      switch (dl->chat.state) {
315        case CHAT_DONE:
316          /* script succeeded */
317          chat_Destroy(&dl->chat);
318          switch(dl->state) {
319            case DATALINK_HANGUP:
320              datalink_HangupDone(dl);
321              break;
322            case DATALINK_DIAL:
323              datalink_NewState(dl, DATALINK_LOGIN);
324              chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, 0, NULL);
325              return datalink_UpdateSet(d, r, w, e, n);
326            case DATALINK_LOGIN:
327              dl->phone.alt = NULL;
328              datalink_LoginDone(dl);
329              return datalink_UpdateSet(d, r, w, e, n);
330          }
331          break;
332        case CHAT_FAILED:
333          /* Going down - script failed */
334          log_Printf(LogWARN, "Chat script failed\n");
335          chat_Destroy(&dl->chat);
336          switch(dl->state) {
337            case DATALINK_HANGUP:
338              datalink_HangupDone(dl);
339              break;
340            case DATALINK_DIAL:
341            case DATALINK_LOGIN:
342              datalink_NewState(dl, DATALINK_HANGUP);
343              physical_Offline(dl->physical);	/* Is this required ? */
344              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
345              return datalink_UpdateSet(d, r, w, e, n);
346          }
347          break;
348      }
349      break;
350
351    case DATALINK_READY:
352    case DATALINK_LCP:
353    case DATALINK_AUTH:
354    case DATALINK_CBCP:
355    case DATALINK_OPEN:
356      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
357               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
358      break;
359  }
360  return result;
361}
362
363int
364datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
365{
366  return physical_RemoveFromSet(dl->physical, r, w, e);
367}
368
369static int
370datalink_IsSet(struct descriptor *d, const fd_set *fdset)
371{
372  struct datalink *dl = descriptor2datalink(d);
373
374  switch (dl->state) {
375    case DATALINK_CLOSED:
376    case DATALINK_OPENING:
377      break;
378
379    case DATALINK_HANGUP:
380    case DATALINK_DIAL:
381    case DATALINK_LOGIN:
382      return descriptor_IsSet(&dl->chat.desc, fdset);
383
384    case DATALINK_READY:
385    case DATALINK_LCP:
386    case DATALINK_AUTH:
387    case DATALINK_CBCP:
388    case DATALINK_OPEN:
389      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
390             descriptor_IsSet(&dl->physical->desc, fdset);
391  }
392  return 0;
393}
394
395static void
396datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
397{
398  struct datalink *dl = descriptor2datalink(d);
399
400  switch (dl->state) {
401    case DATALINK_CLOSED:
402    case DATALINK_OPENING:
403      break;
404
405    case DATALINK_HANGUP:
406    case DATALINK_DIAL:
407    case DATALINK_LOGIN:
408      descriptor_Read(&dl->chat.desc, bundle, fdset);
409      break;
410
411    case DATALINK_READY:
412    case DATALINK_LCP:
413    case DATALINK_AUTH:
414    case DATALINK_CBCP:
415    case DATALINK_OPEN:
416      if (descriptor_IsSet(&dl->chap.desc, fdset))
417        descriptor_Read(&dl->chap.desc, bundle, fdset);
418      if (descriptor_IsSet(&dl->physical->desc, fdset))
419        descriptor_Read(&dl->physical->desc, bundle, fdset);
420      break;
421  }
422}
423
424static int
425datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
426{
427  struct datalink *dl = descriptor2datalink(d);
428  int result = 0;
429
430  switch (dl->state) {
431    case DATALINK_CLOSED:
432    case DATALINK_OPENING:
433      break;
434
435    case DATALINK_HANGUP:
436    case DATALINK_DIAL:
437    case DATALINK_LOGIN:
438      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
439      break;
440
441    case DATALINK_READY:
442    case DATALINK_LCP:
443    case DATALINK_AUTH:
444    case DATALINK_CBCP:
445    case DATALINK_OPEN:
446      if (descriptor_IsSet(&dl->chap.desc, fdset))
447        result += descriptor_Write(&dl->chap.desc, bundle, fdset);
448      if (descriptor_IsSet(&dl->physical->desc, fdset))
449        result += descriptor_Write(&dl->physical->desc, bundle, fdset);
450      break;
451  }
452
453  return result;
454}
455
456static void
457datalink_ComeDown(struct datalink *dl, int how)
458{
459  if (how != CLOSE_NORMAL) {
460    dl->dial.tries = -1;
461    dl->reconnect_tries = 0;
462    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
463      dl->stayonline = 1;
464  }
465
466  if (dl->state >= DATALINK_READY && dl->stayonline) {
467    dl->stayonline = 0;
468    physical_StopDeviceTimer(dl->physical);
469    datalink_NewState(dl, DATALINK_READY);
470  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
471    physical_Offline(dl->physical);
472    chat_Destroy(&dl->chat);
473    if (dl->script.run && dl->state != DATALINK_OPENING) {
474      datalink_NewState(dl, DATALINK_HANGUP);
475      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
476    } else
477      datalink_HangupDone(dl);
478  }
479}
480
481static void
482datalink_LayerStart(void *v, struct fsm *fp)
483{
484  /* The given FSM is about to start up ! */
485  struct datalink *dl = (struct datalink *)v;
486
487  if (fp->proto == PROTO_LCP)
488    (*dl->parent->LayerStart)(dl->parent->object, fp);
489}
490
491static void
492datalink_LayerUp(void *v, struct fsm *fp)
493{
494  /* The given fsm is now up */
495  struct datalink *dl = (struct datalink *)v;
496  struct lcp *lcp = &dl->physical->link.lcp;
497
498  if (fp->proto == PROTO_LCP) {
499    datalink_GotAuthname(dl, "");
500    lcp->auth_ineed = lcp->want_auth;
501    lcp->auth_iwait = lcp->his_auth;
502    if (lcp->his_auth || lcp->want_auth) {
503      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
504        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
505      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
506                Auth2Nam(lcp->his_auth, lcp->his_authtype),
507                Auth2Nam(lcp->want_auth, lcp->want_authtype));
508      if (lcp->his_auth == PROTO_PAP)
509        auth_StartReq(&dl->pap);
510      if (lcp->want_auth == PROTO_CHAP)
511        auth_StartReq(&dl->chap.auth);
512    } else
513      datalink_AuthOk(dl);
514  }
515}
516
517static void
518datalink_AuthReInit(struct datalink *dl)
519{
520  auth_StopTimer(&dl->pap);
521  auth_StopTimer(&dl->chap.auth);
522  chap_ReInit(&dl->chap);
523}
524
525void
526datalink_GotAuthname(struct datalink *dl, const char *name)
527{
528  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
529  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
530}
531
532void
533datalink_NCPUp(struct datalink *dl)
534{
535  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
536
537  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
538    /* we've authenticated in multilink mode ! */
539    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
540      case MP_LINKSENT:
541        /* We've handed the link off to another ppp (well, we will soon) ! */
542        return;
543      case MP_UP:
544        /* First link in the bundle */
545        auth_Select(dl->bundle, dl->peer.authname);
546        /* fall through */
547      case MP_ADDED:
548        /* We're in multilink mode ! */
549        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
550        break;
551      case MP_FAILED:
552        datalink_AuthNotOk(dl);
553        return;
554    }
555  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
556    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
557    datalink_NewState(dl, DATALINK_OPEN);
558    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
559    return;
560  } else {
561    dl->bundle->ncp.mp.peer = dl->peer;
562    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
563    auth_Select(dl->bundle, dl->peer.authname);
564  }
565
566  if (ccpok) {
567    fsm_Up(&dl->physical->link.ccp.fsm);
568    fsm_Open(&dl->physical->link.ccp.fsm);
569  }
570  datalink_NewState(dl, DATALINK_OPEN);
571  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
572  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
573}
574
575void
576datalink_CBCPComplete(struct datalink *dl)
577{
578  datalink_NewState(dl, DATALINK_LCP);
579  datalink_AuthReInit(dl);
580  fsm_Close(&dl->physical->link.lcp.fsm);
581}
582
583void
584datalink_CBCPFailed(struct datalink *dl)
585{
586  cbcp_Down(&dl->cbcp);
587  datalink_CBCPComplete(dl);
588}
589
590void
591datalink_AuthOk(struct datalink *dl)
592{
593  if ((dl->physical->link.lcp.his_callback.opmask &
594       CALLBACK_BIT(CALLBACK_CBCP) ||
595       dl->physical->link.lcp.want_callback.opmask &
596       CALLBACK_BIT(CALLBACK_CBCP)) &&
597      !(dl->physical->link.lcp.want_callback.opmask &
598        CALLBACK_BIT(CALLBACK_AUTH))) {
599    /* We must have agreed CBCP if AUTH isn't there any more */
600    datalink_NewState(dl, DATALINK_CBCP);
601    cbcp_Up(&dl->cbcp);
602  } else if (dl->physical->link.lcp.want_callback.opmask) {
603    /* It's not CBCP */
604    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
605    datalink_NewState(dl, DATALINK_LCP);
606    datalink_AuthReInit(dl);
607    fsm_Close(&dl->physical->link.lcp.fsm);
608  } else
609    switch (dl->physical->link.lcp.his_callback.opmask) {
610      case 0:
611        datalink_NCPUp(dl);
612        break;
613
614      case CALLBACK_BIT(CALLBACK_AUTH):
615        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
616                          sizeof dl->cbcp.fsm.phone);
617        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
618          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
619                     dl->peer.authname);
620          *dl->cbcp.fsm.phone = '\0';
621        } else {
622          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
623          if (ptr)
624            *ptr = '\0';	/* Call back on the first number */
625          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
626                     dl->cbcp.fsm.phone);
627          dl->cbcp.required = 1;
628        }
629        dl->cbcp.fsm.delay = 0;
630        datalink_NewState(dl, DATALINK_LCP);
631        datalink_AuthReInit(dl);
632        fsm_Close(&dl->physical->link.lcp.fsm);
633        break;
634
635      case CALLBACK_BIT(CALLBACK_E164):
636        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
637                sizeof dl->cbcp.fsm.phone - 1);
638        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
639        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
640                   dl->cbcp.fsm.phone);
641        dl->cbcp.required = 1;
642        dl->cbcp.fsm.delay = 0;
643        datalink_NewState(dl, DATALINK_LCP);
644        datalink_AuthReInit(dl);
645        fsm_Close(&dl->physical->link.lcp.fsm);
646        break;
647
648      default:
649        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
650                   dl->name);
651        datalink_NewState(dl, DATALINK_LCP);
652        datalink_AuthReInit(dl);
653        fsm_Close(&dl->physical->link.lcp.fsm);
654        break;
655    }
656}
657
658void
659datalink_AuthNotOk(struct datalink *dl)
660{
661  datalink_NewState(dl, DATALINK_LCP);
662  datalink_AuthReInit(dl);
663  fsm_Close(&dl->physical->link.lcp.fsm);
664}
665
666static void
667datalink_LayerDown(void *v, struct fsm *fp)
668{
669  /* The given FSM has been told to come down */
670  struct datalink *dl = (struct datalink *)v;
671
672  if (fp->proto == PROTO_LCP) {
673    switch (dl->state) {
674      case DATALINK_OPEN:
675        peerid_Init(&dl->peer);
676        fsm2initial(&dl->physical->link.ccp.fsm);
677        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
678        (*dl->parent->LayerDown)(dl->parent->object, fp);
679        /* fall through (just in case) */
680
681      case DATALINK_CBCP:
682        if (!dl->cbcp.required)
683          cbcp_Down(&dl->cbcp);
684        /* fall through (just in case) */
685
686      case DATALINK_AUTH:
687        timer_Stop(&dl->pap.authtimer);
688        timer_Stop(&dl->chap.auth.authtimer);
689    }
690    datalink_NewState(dl, DATALINK_LCP);
691    datalink_AuthReInit(dl);
692  }
693}
694
695static void
696datalink_LayerFinish(void *v, struct fsm *fp)
697{
698  /* The given fsm is now down */
699  struct datalink *dl = (struct datalink *)v;
700
701  if (fp->proto == PROTO_LCP) {
702    fsm2initial(fp);
703    (*dl->parent->LayerFinish)(dl->parent->object, fp);
704    datalink_ComeDown(dl, CLOSE_NORMAL);
705  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
706    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
707}
708
709struct datalink *
710datalink_Create(const char *name, struct bundle *bundle, int type)
711{
712  struct datalink *dl;
713
714  dl = (struct datalink *)malloc(sizeof(struct datalink));
715  if (dl == NULL)
716    return dl;
717
718  dl->desc.type = DATALINK_DESCRIPTOR;
719  dl->desc.UpdateSet = datalink_UpdateSet;
720  dl->desc.IsSet = datalink_IsSet;
721  dl->desc.Read = datalink_Read;
722  dl->desc.Write = datalink_Write;
723
724  dl->state = DATALINK_CLOSED;
725
726  *dl->cfg.script.dial = '\0';
727  *dl->cfg.script.login = '\0';
728  *dl->cfg.script.hangup = '\0';
729  *dl->cfg.phone.list = '\0';
730  *dl->phone.list = '\0';
731  dl->phone.next = NULL;
732  dl->phone.alt = NULL;
733  dl->phone.chosen = "N/A";
734  dl->stayonline = 0;
735  dl->script.run = 1;
736  dl->script.packetmode = 1;
737  mp_linkInit(&dl->mp);
738
739  dl->bundle = bundle;
740  dl->next = NULL;
741
742  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
743
744  dl->dial.tries = 0;
745  dl->cfg.dial.max = 1;
746  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
747  dl->cfg.dial.timeout = DIAL_TIMEOUT;
748  dl->cfg.dial.inc = 0;
749  dl->cfg.dial.maxinc = 10;
750
751  dl->reconnect_tries = 0;
752  dl->cfg.reconnect.max = 0;
753  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
754
755  dl->cfg.callback.opmask = 0;
756  dl->cfg.cbcp.delay = 0;
757  *dl->cfg.cbcp.phone = '\0';
758  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
759
760  dl->name = strdup(name);
761  peerid_Init(&dl->peer);
762  dl->parent = &bundle->fsm;
763  dl->fsmp.LayerStart = datalink_LayerStart;
764  dl->fsmp.LayerUp = datalink_LayerUp;
765  dl->fsmp.LayerDown = datalink_LayerDown;
766  dl->fsmp.LayerFinish = datalink_LayerFinish;
767  dl->fsmp.object = dl;
768
769  if ((dl->physical = physical_Create(dl, type)) == NULL) {
770    free(dl->name);
771    free(dl);
772    return NULL;
773  }
774
775  pap_Init(&dl->pap, dl->physical);
776  chap_Init(&dl->chap, dl->physical);
777  cbcp_Init(&dl->cbcp, dl->physical);
778  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
779
780  log_Printf(LogPHASE, "%s: Created in %s state\n",
781             dl->name, datalink_State(dl));
782
783  return dl;
784}
785
786struct datalink *
787datalink_Clone(struct datalink *odl, const char *name)
788{
789  struct datalink *dl;
790
791  dl = (struct datalink *)malloc(sizeof(struct datalink));
792  if (dl == NULL)
793    return dl;
794
795  dl->desc.type = DATALINK_DESCRIPTOR;
796  dl->desc.UpdateSet = datalink_UpdateSet;
797  dl->desc.IsSet = datalink_IsSet;
798  dl->desc.Read = datalink_Read;
799  dl->desc.Write = datalink_Write;
800
801  dl->state = DATALINK_CLOSED;
802
803  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
804  mp_linkInit(&dl->mp);
805  *dl->phone.list = '\0';
806  dl->phone.next = NULL;
807  dl->phone.alt = NULL;
808  dl->phone.chosen = "N/A";
809  dl->bundle = odl->bundle;
810  dl->next = NULL;
811  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
812  dl->dial.tries = 0;
813  dl->reconnect_tries = 0;
814  dl->name = strdup(name);
815  peerid_Init(&dl->peer);
816  dl->parent = odl->parent;
817  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
818  dl->fsmp.object = dl;
819
820  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
821    free(dl->name);
822    free(dl);
823    return NULL;
824  }
825  pap_Init(&dl->pap, dl->physical);
826  dl->pap.cfg = odl->pap.cfg;
827
828  chap_Init(&dl->chap, dl->physical);
829  dl->chap.auth.cfg = odl->chap.auth.cfg;
830
831  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
832  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
833         sizeof dl->physical->link.lcp.cfg);
834  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
835         sizeof dl->physical->link.ccp.cfg);
836  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
837         sizeof dl->physical->async.cfg);
838
839  cbcp_Init(&dl->cbcp, dl->physical);
840  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
841
842  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
843             dl->name, datalink_State(dl));
844
845  return dl;
846}
847
848struct datalink *
849datalink_Destroy(struct datalink *dl)
850{
851  struct datalink *result;
852
853  if (dl->state != DATALINK_CLOSED) {
854    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
855              datalink_State(dl));
856    switch (dl->state) {
857      case DATALINK_HANGUP:
858      case DATALINK_DIAL:
859      case DATALINK_LOGIN:
860        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
861        break;
862    }
863  }
864
865  timer_Stop(&dl->dial.timer);
866  result = dl->next;
867  physical_Destroy(dl->physical);
868  free(dl->name);
869  free(dl);
870
871  return result;
872}
873
874void
875datalink_Up(struct datalink *dl, int runscripts, int packetmode)
876{
877  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
878    /* Ignore scripts */
879    runscripts = 0;
880
881  switch (dl->state) {
882    case DATALINK_CLOSED:
883      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
884          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
885        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
886      datalink_NewState(dl, DATALINK_OPENING);
887      dl->reconnect_tries =
888        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
889      dl->dial.tries = dl->cfg.dial.max;
890      dl->script.run = runscripts;
891      dl->script.packetmode = packetmode;
892      break;
893
894    case DATALINK_OPENING:
895      if (!dl->script.run && runscripts)
896        dl->script.run = 1;
897      /* fall through */
898
899    case DATALINK_DIAL:
900    case DATALINK_LOGIN:
901    case DATALINK_READY:
902      if (!dl->script.packetmode && packetmode) {
903        dl->script.packetmode = 1;
904        if (dl->state == DATALINK_READY)
905          datalink_LoginDone(dl);
906      }
907      break;
908  }
909}
910
911void
912datalink_Close(struct datalink *dl, int how)
913{
914  /* Please close */
915  switch (dl->state) {
916    case DATALINK_OPEN:
917      peerid_Init(&dl->peer);
918      fsm2initial(&dl->physical->link.ccp.fsm);
919      /* fall through */
920
921    case DATALINK_CBCP:
922    case DATALINK_AUTH:
923    case DATALINK_LCP:
924      datalink_AuthReInit(dl);
925      fsm_Close(&dl->physical->link.lcp.fsm);
926      if (how != CLOSE_NORMAL) {
927        dl->dial.tries = -1;
928        dl->reconnect_tries = 0;
929        if (how == CLOSE_LCP)
930          dl->stayonline = 1;
931      }
932      break;
933
934    default:
935      datalink_ComeDown(dl, how);
936  }
937}
938
939void
940datalink_Down(struct datalink *dl, int how)
941{
942  /* Carrier is lost */
943  switch (dl->state) {
944    case DATALINK_OPEN:
945      peerid_Init(&dl->peer);
946      fsm2initial(&dl->physical->link.ccp.fsm);
947      /* fall through */
948
949    case DATALINK_CBCP:
950    case DATALINK_AUTH:
951    case DATALINK_LCP:
952      fsm2initial(&dl->physical->link.lcp.fsm);
953      /* fall through */
954
955    default:
956      datalink_ComeDown(dl, how);
957  }
958}
959
960void
961datalink_StayDown(struct datalink *dl)
962{
963  dl->reconnect_tries = 0;
964}
965
966void
967datalink_DontHangup(struct datalink *dl)
968{
969  if (dl->state >= DATALINK_LCP)
970    dl->stayonline = 1;
971}
972
973int
974datalink_Show(struct cmdargs const *arg)
975{
976  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
977  prompt_Printf(arg->prompt, " State:              %s\n",
978                datalink_State(arg->cx));
979  prompt_Printf(arg->prompt, " Peer name:          ");
980  if (*arg->cx->peer.authname)
981    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
982  else if (arg->cx->state == DATALINK_OPEN)
983    prompt_Printf(arg->prompt, "None requested\n");
984  else
985    prompt_Printf(arg->prompt, "N/A\n");
986  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
987                mp_Enddisc(arg->cx->peer.enddisc.class,
988                           arg->cx->peer.enddisc.address,
989                           arg->cx->peer.enddisc.len));
990
991  prompt_Printf(arg->prompt, "\nDefaults:\n");
992  prompt_Printf(arg->prompt, " Phone List:         %s\n",
993                arg->cx->cfg.phone.list);
994  if (arg->cx->cfg.dial.max)
995    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
996                  arg->cx->cfg.dial.max);
997  else
998    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
999  if (arg->cx->cfg.dial.next_timeout >= 0)
1000    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1001  else
1002    prompt_Printf(arg->prompt, "random/");
1003  if (arg->cx->cfg.dial.timeout >= 0)
1004    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1005  else
1006    prompt_Printf(arg->prompt, "random\n");
1007  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1008                arg->cx->cfg.reconnect.max);
1009  if (arg->cx->cfg.reconnect.timeout > 0)
1010    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1011  else
1012    prompt_Printf(arg->prompt, "random\n");
1013  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1014                PHYS_DIRECT ?  "accepted: " : "requested:");
1015  if (!arg->cx->cfg.callback.opmask)
1016    prompt_Printf(arg->prompt, "none\n");
1017  else {
1018    int comma = 0;
1019
1020    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1021      prompt_Printf(arg->prompt, "none");
1022      comma = 1;
1023    }
1024    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1025      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1026      comma = 1;
1027    }
1028    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1029      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1030      if (arg->cx->physical->type != PHYS_DIRECT)
1031        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1032      comma = 1;
1033    }
1034    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1035      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1036      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1037                    arg->cx->cfg.cbcp.delay);
1038      prompt_Printf(arg->prompt, "                     phone: ");
1039      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1040        if (arg->cx->physical->type & PHYS_DIRECT)
1041          prompt_Printf(arg->prompt, "Caller decides\n");
1042        else
1043          prompt_Printf(arg->prompt, "Dialback server decides\n");
1044      } else
1045        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1046      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1047                    arg->cx->cfg.cbcp.fsmretry);
1048    } else
1049      prompt_Printf(arg->prompt, "\n");
1050  }
1051
1052  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1053                arg->cx->cfg.script.dial);
1054  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1055                arg->cx->cfg.script.login);
1056  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1057                arg->cx->cfg.script.hangup);
1058  return 0;
1059}
1060
1061int
1062datalink_SetReconnect(struct cmdargs const *arg)
1063{
1064  if (arg->argc == arg->argn+2) {
1065    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1066    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1067    return 0;
1068  }
1069  return -1;
1070}
1071
1072int
1073datalink_SetRedial(struct cmdargs const *arg)
1074{
1075  const char *sep, *osep;
1076  int timeout, inc, maxinc, tries;
1077
1078  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1079    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1080	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1081      arg->cx->cfg.dial.timeout = -1;
1082      randinit();
1083    } else {
1084      timeout = atoi(arg->argv[arg->argn]);
1085
1086      if (timeout >= 0)
1087	arg->cx->cfg.dial.timeout = timeout;
1088      else {
1089	log_Printf(LogWARN, "Invalid redial timeout\n");
1090	return -1;
1091      }
1092    }
1093
1094    sep = strchr(arg->argv[arg->argn], '+');
1095    if (sep) {
1096      inc = atoi(++sep);
1097      osep = sep;
1098      if (inc >= 0)
1099        arg->cx->cfg.dial.inc = inc;
1100      else {
1101        log_Printf(LogWARN, "Invalid timeout increment\n");
1102        return -1;
1103      }
1104      sep = strchr(sep, '-');
1105      if (sep) {
1106        maxinc = atoi(++sep);
1107        if (maxinc >= 0)
1108          arg->cx->cfg.dial.maxinc = maxinc;
1109        else {
1110          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1111          return -1;
1112        }
1113      } else {
1114        /* Default timeout increment */
1115        arg->cx->cfg.dial.maxinc = 10;
1116        sep = osep;
1117      }
1118    } else {
1119      /* Default timeout increment & max increment */
1120      arg->cx->cfg.dial.inc = 0;
1121      arg->cx->cfg.dial.maxinc = 10;
1122      sep = arg->argv[arg->argn];
1123    }
1124
1125    sep = strchr(sep, '.');
1126    if (sep) {
1127      if (strcasecmp(++sep, "random") == 0) {
1128	arg->cx->cfg.dial.next_timeout = -1;
1129	randinit();
1130      } else {
1131	timeout = atoi(sep);
1132	if (timeout >= 0)
1133	  arg->cx->cfg.dial.next_timeout = timeout;
1134	else {
1135	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1136	  return -1;
1137	}
1138      }
1139    } else
1140      /* Default next timeout */
1141      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1142
1143    if (arg->argc == arg->argn+2) {
1144      tries = atoi(arg->argv[arg->argn+1]);
1145
1146      if (tries >= 0) {
1147	arg->cx->cfg.dial.max = tries;
1148      } else {
1149	log_Printf(LogWARN, "Invalid retry value\n");
1150	return 1;
1151      }
1152    }
1153    return 0;
1154  }
1155
1156  return -1;
1157}
1158
1159static const char *states[] = {
1160  "closed",
1161  "opening",
1162  "hangup",
1163  "dial",
1164  "login",
1165  "ready",
1166  "lcp",
1167  "auth",
1168  "cbcp",
1169  "open"
1170};
1171
1172const char *
1173datalink_State(struct datalink *dl)
1174{
1175  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1176    return "unknown";
1177  return states[dl->state];
1178}
1179
1180static void
1181datalink_NewState(struct datalink *dl, int state)
1182{
1183  if (state != dl->state) {
1184    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1185      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1186                 states[state]);
1187      dl->state = state;
1188    } else
1189      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1190  }
1191}
1192
1193struct datalink *
1194iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1195             int fd)
1196{
1197  struct datalink *dl, *cdl;
1198  struct fsm_retry copy;
1199  char *oname;
1200
1201  dl = (struct datalink *)iov[(*niov)++].iov_base;
1202  dl->name = iov[*niov].iov_base;
1203
1204  if (dl->name[DATALINK_MAXNAME-1]) {
1205    dl->name[DATALINK_MAXNAME-1] = '\0';
1206    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1207      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1208  }
1209
1210  /* Make sure the name is unique ! */
1211  oname = NULL;
1212  do {
1213    for (cdl = bundle->links; cdl; cdl = cdl->next)
1214      if (!strcasecmp(dl->name, cdl->name)) {
1215        if (oname)
1216          free(datalink_NextName(dl));
1217        else
1218          oname = datalink_NextName(dl);
1219        break;	/* Keep renaming 'till we have no conflicts */
1220      }
1221  } while (cdl);
1222
1223  if (oname) {
1224    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1225    free(oname);
1226  } else {
1227    dl->name = strdup(dl->name);
1228    free(iov[*niov].iov_base);
1229  }
1230  (*niov)++;
1231
1232  dl->desc.type = DATALINK_DESCRIPTOR;
1233  dl->desc.UpdateSet = datalink_UpdateSet;
1234  dl->desc.IsSet = datalink_IsSet;
1235  dl->desc.Read = datalink_Read;
1236  dl->desc.Write = datalink_Write;
1237
1238  mp_linkInit(&dl->mp);
1239  *dl->phone.list = '\0';
1240  dl->phone.next = NULL;
1241  dl->phone.alt = NULL;
1242  dl->phone.chosen = "N/A";
1243
1244  dl->bundle = bundle;
1245  dl->next = NULL;
1246  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1247  dl->dial.tries = 0;
1248  dl->reconnect_tries = 0;
1249  dl->parent = &bundle->fsm;
1250  dl->fsmp.LayerStart = datalink_LayerStart;
1251  dl->fsmp.LayerUp = datalink_LayerUp;
1252  dl->fsmp.LayerDown = datalink_LayerDown;
1253  dl->fsmp.LayerFinish = datalink_LayerFinish;
1254  dl->fsmp.object = dl;
1255
1256  dl->physical = iov2physical(dl, iov, niov, maxiov, fd);
1257
1258  if (!dl->physical) {
1259    free(dl->name);
1260    free(dl);
1261    dl = NULL;
1262  } else {
1263    copy = dl->pap.cfg.fsm;
1264    pap_Init(&dl->pap, dl->physical);
1265    dl->pap.cfg.fsm = copy;
1266
1267    copy = dl->chap.auth.cfg.fsm;
1268    chap_Init(&dl->chap, dl->physical);
1269    dl->chap.auth.cfg.fsm = copy;
1270
1271    cbcp_Init(&dl->cbcp, dl->physical);
1272    chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
1273
1274    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1275              dl->name, datalink_State(dl));
1276  }
1277
1278  return dl;
1279}
1280
1281int
1282datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1283             pid_t newpid)
1284{
1285  /* If `dl' is NULL, we're allocating before a Fromiov() */
1286  int link_fd;
1287
1288  if (dl) {
1289    timer_Stop(&dl->dial.timer);
1290    /* The following is purely for the sake of paranoia */
1291    cbcp_Down(&dl->cbcp);
1292    timer_Stop(&dl->pap.authtimer);
1293    timer_Stop(&dl->chap.auth.authtimer);
1294  }
1295
1296  if (*niov >= maxiov - 1) {
1297    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1298    if (dl) {
1299      free(dl->name);
1300      free(dl);
1301    }
1302    return -1;
1303  }
1304
1305  iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl);
1306  iov[(*niov)++].iov_len = sizeof *dl;
1307  iov[*niov].iov_base =
1308    dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME);
1309  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1310
1311  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, newpid);
1312
1313  if (link_fd == -1 && dl) {
1314    free(dl->name);
1315    free(dl);
1316  }
1317
1318  return link_fd;
1319}
1320
1321void
1322datalink_Rename(struct datalink *dl, const char *name)
1323{
1324  free(dl->name);
1325  dl->physical->link.name = dl->name = strdup(name);
1326}
1327
1328char *
1329datalink_NextName(struct datalink *dl)
1330{
1331  int f, n;
1332  char *name, *oname;
1333
1334  n = strlen(dl->name);
1335  name = (char *)malloc(n+3);
1336  for (f = n - 1; f >= 0; f--)
1337    if (!isdigit(dl->name[f]))
1338      break;
1339  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1340  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1341  oname = dl->name;
1342  dl->name = name;
1343  /* our physical link name isn't updated (it probably isn't created yet) */
1344  return oname;
1345}
1346
1347int
1348datalink_SetMode(struct datalink *dl, int mode)
1349{
1350  if (!physical_SetMode(dl->physical, mode))
1351    return 0;
1352  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1353    dl->script.run = 0;
1354  if (dl->physical->type == PHYS_DIRECT)
1355    dl->reconnect_tries = 0;
1356  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND) && dl->state <= DATALINK_READY)
1357    datalink_Up(dl, 1, 1);
1358  return 1;
1359}
1360
1361int
1362datalink_GetDialTimeout(struct datalink *dl)
1363{
1364  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1365
1366  if (dl->dial.incs < dl->cfg.dial.maxinc)
1367    dl->dial.incs++;
1368
1369  return result;
1370}
1371