datalink.c revision 47863 
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 1.39 1999/05/12 09:48:47 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      dl->phone.next = dl->phone.list;
188    }
189    dl->phone.alt = strsep(&dl->phone.next, ":");
190  }
191  phone = strsep(&dl->phone.alt, "|");
192  dl->phone.chosen = *phone ? phone : "[NONE]";
193  if (*phone)
194    log_Printf(LogPHASE, "Phone: %s\n", phone);
195  return phone;
196}
197
198static void
199datalink_LoginDone(struct datalink *dl)
200{
201  if (!dl->script.packetmode) {
202    dl->dial.tries = -1;
203    dl->dial.incs = 0;
204    datalink_NewState(dl, DATALINK_READY);
205  } else if (!physical_Raw(dl->physical)) {
206    dl->dial.tries = 0;
207    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
208    if (dl->script.run) {
209      datalink_NewState(dl, DATALINK_HANGUP);
210      physical_Offline(dl->physical);
211      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
212    } else {
213      physical_StopDeviceTimer(dl->physical);
214      if (dl->physical->type == PHYS_DEDICATED)
215        /* force a redial timeout */
216        physical_Close(dl->physical);
217      datalink_HangupDone(dl);
218    }
219  } else {
220    dl->dial.tries = -1;
221    dl->dial.incs = 0;
222
223    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
224    async_Init(&dl->physical->async);
225
226    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
227              0 : dl->physical->link.lcp.cfg.openmode);
228    ccp_Setup(&dl->physical->link.ccp);
229
230    datalink_NewState(dl, DATALINK_LCP);
231    fsm_Up(&dl->physical->link.lcp.fsm);
232    fsm_Open(&dl->physical->link.lcp.fsm);
233  }
234}
235
236static int
237datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
238                   int *n)
239{
240  struct datalink *dl = descriptor2datalink(d);
241  int result;
242
243  result = 0;
244  switch (dl->state) {
245    case DATALINK_CLOSED:
246      if ((dl->physical->type &
247           (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|PHYS_DDIAL)) &&
248          !dl->bundle->CleaningUp)
249        /*
250         * Our first time in - DEDICATED & DDIAL never come down, and
251         * DIRECT & BACKGROUND get deleted when they enter DATALINK_CLOSED.
252         * Go to DATALINK_OPENING via datalink_Up() and fall through.
253         */
254        datalink_Up(dl, 1, 1);
255      else
256        break;
257      /* fall through */
258
259    case DATALINK_OPENING:
260      if (dl->dial.timer.state != TIMER_RUNNING) {
261        if (--dl->dial.tries < 0)
262          dl->dial.tries = 0;
263        if (physical_Open(dl->physical, dl->bundle) >= 0) {
264          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
265                           "Type `~?' for help\r\n", dl->name,
266                           dl->physical->name.full);
267          if (dl->script.run) {
268            datalink_NewState(dl, DATALINK_DIAL);
269            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial, 1,
270                      datalink_ChoosePhoneNumber(dl));
271            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
272                dl->cfg.dial.max)
273              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
274                        dl->name, dl->cfg.dial.max - dl->dial.tries,
275                        dl->cfg.dial.max);
276          } else
277            datalink_LoginDone(dl);
278          return datalink_UpdateSet(d, r, w, e, n);
279        } else {
280          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
281              dl->cfg.dial.max)
282            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
283                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
284          else
285            log_Printf(LogCHAT, "Failed to open device\n");
286
287          if (dl->bundle->CleaningUp ||
288              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
289               dl->cfg.dial.max && dl->dial.tries == 0)) {
290            datalink_NewState(dl, DATALINK_CLOSED);
291            dl->reconnect_tries = 0;
292            dl->dial.tries = -1;
293            log_WritePrompts(dl, "Failed to open %s\n",
294                             dl->physical->name.full);
295            bundle_LinkClosed(dl->bundle, dl);
296          }
297          if (!dl->bundle->CleaningUp) {
298            int timeout;
299
300            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
301            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
302                             dl->physical->name.full, timeout);
303          }
304        }
305      }
306      break;
307
308    case DATALINK_HANGUP:
309    case DATALINK_DIAL:
310    case DATALINK_LOGIN:
311      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
312      switch (dl->chat.state) {
313        case CHAT_DONE:
314          /* script succeeded */
315          chat_Destroy(&dl->chat);
316          switch(dl->state) {
317            case DATALINK_HANGUP:
318              datalink_HangupDone(dl);
319              break;
320            case DATALINK_DIAL:
321              datalink_NewState(dl, DATALINK_LOGIN);
322              chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, 0, NULL);
323              return datalink_UpdateSet(d, r, w, e, n);
324            case DATALINK_LOGIN:
325              dl->phone.alt = NULL;
326              datalink_LoginDone(dl);
327              return datalink_UpdateSet(d, r, w, e, n);
328          }
329          break;
330        case CHAT_FAILED:
331          /* Going down - script failed */
332          log_Printf(LogWARN, "Chat script failed\n");
333          chat_Destroy(&dl->chat);
334          switch(dl->state) {
335            case DATALINK_HANGUP:
336              datalink_HangupDone(dl);
337              break;
338            case DATALINK_DIAL:
339            case DATALINK_LOGIN:
340              datalink_NewState(dl, DATALINK_HANGUP);
341              physical_Offline(dl->physical);	/* Is this required ? */
342              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
343              return datalink_UpdateSet(d, r, w, e, n);
344          }
345          break;
346      }
347      break;
348
349    case DATALINK_READY:
350    case DATALINK_LCP:
351    case DATALINK_AUTH:
352    case DATALINK_CBCP:
353    case DATALINK_OPEN:
354      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
355               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
356      break;
357  }
358  return result;
359}
360
361int
362datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
363{
364  return physical_RemoveFromSet(dl->physical, r, w, e);
365}
366
367static int
368datalink_IsSet(struct descriptor *d, const fd_set *fdset)
369{
370  struct datalink *dl = descriptor2datalink(d);
371
372  switch (dl->state) {
373    case DATALINK_CLOSED:
374    case DATALINK_OPENING:
375      break;
376
377    case DATALINK_HANGUP:
378    case DATALINK_DIAL:
379    case DATALINK_LOGIN:
380      return descriptor_IsSet(&dl->chat.desc, fdset);
381
382    case DATALINK_READY:
383    case DATALINK_LCP:
384    case DATALINK_AUTH:
385    case DATALINK_CBCP:
386    case DATALINK_OPEN:
387      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
388             descriptor_IsSet(&dl->physical->desc, fdset);
389  }
390  return 0;
391}
392
393static void
394datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
395{
396  struct datalink *dl = descriptor2datalink(d);
397
398  switch (dl->state) {
399    case DATALINK_CLOSED:
400    case DATALINK_OPENING:
401      break;
402
403    case DATALINK_HANGUP:
404    case DATALINK_DIAL:
405    case DATALINK_LOGIN:
406      descriptor_Read(&dl->chat.desc, bundle, fdset);
407      break;
408
409    case DATALINK_READY:
410    case DATALINK_LCP:
411    case DATALINK_AUTH:
412    case DATALINK_CBCP:
413    case DATALINK_OPEN:
414      if (descriptor_IsSet(&dl->chap.desc, fdset))
415        descriptor_Read(&dl->chap.desc, bundle, fdset);
416      if (descriptor_IsSet(&dl->physical->desc, fdset))
417        descriptor_Read(&dl->physical->desc, bundle, fdset);
418      break;
419  }
420}
421
422static int
423datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
424{
425  struct datalink *dl = descriptor2datalink(d);
426  int result = 0;
427
428  switch (dl->state) {
429    case DATALINK_CLOSED:
430    case DATALINK_OPENING:
431      break;
432
433    case DATALINK_HANGUP:
434    case DATALINK_DIAL:
435    case DATALINK_LOGIN:
436      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
437      break;
438
439    case DATALINK_READY:
440    case DATALINK_LCP:
441    case DATALINK_AUTH:
442    case DATALINK_CBCP:
443    case DATALINK_OPEN:
444      if (descriptor_IsSet(&dl->chap.desc, fdset))
445        result += descriptor_Write(&dl->chap.desc, bundle, fdset);
446      if (descriptor_IsSet(&dl->physical->desc, fdset))
447        result += descriptor_Write(&dl->physical->desc, bundle, fdset);
448      break;
449  }
450
451  return result;
452}
453
454static void
455datalink_ComeDown(struct datalink *dl, int how)
456{
457  if (how != CLOSE_NORMAL) {
458    dl->dial.tries = -1;
459    dl->reconnect_tries = 0;
460    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
461      dl->stayonline = 1;
462  }
463
464  if (dl->state >= DATALINK_READY && dl->stayonline) {
465    dl->stayonline = 0;
466    physical_StopDeviceTimer(dl->physical);
467    datalink_NewState(dl, DATALINK_READY);
468  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
469    physical_Offline(dl->physical);
470    chat_Destroy(&dl->chat);
471    if (dl->script.run && dl->state != DATALINK_OPENING) {
472      datalink_NewState(dl, DATALINK_HANGUP);
473      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
474    } else
475      datalink_HangupDone(dl);
476  }
477}
478
479static void
480datalink_LayerStart(void *v, struct fsm *fp)
481{
482  /* The given FSM is about to start up ! */
483  struct datalink *dl = (struct datalink *)v;
484
485  if (fp->proto == PROTO_LCP)
486    (*dl->parent->LayerStart)(dl->parent->object, fp);
487}
488
489static void
490datalink_LayerUp(void *v, struct fsm *fp)
491{
492  /* The given fsm is now up */
493  struct datalink *dl = (struct datalink *)v;
494  struct lcp *lcp = &dl->physical->link.lcp;
495
496  if (fp->proto == PROTO_LCP) {
497    datalink_GotAuthname(dl, "");
498    lcp->auth_ineed = lcp->want_auth;
499    lcp->auth_iwait = lcp->his_auth;
500    if (lcp->his_auth || lcp->want_auth) {
501      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
502        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
503      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
504                Auth2Nam(lcp->his_auth, lcp->his_authtype),
505                Auth2Nam(lcp->want_auth, lcp->want_authtype));
506      if (lcp->his_auth == PROTO_PAP)
507        auth_StartReq(&dl->pap);
508      if (lcp->want_auth == PROTO_CHAP)
509        auth_StartReq(&dl->chap.auth);
510    } else
511      datalink_AuthOk(dl);
512  }
513}
514
515static void
516datalink_AuthReInit(struct datalink *dl)
517{
518  auth_StopTimer(&dl->pap);
519  auth_StopTimer(&dl->chap.auth);
520  chap_ReInit(&dl->chap);
521}
522
523void
524datalink_GotAuthname(struct datalink *dl, const char *name)
525{
526  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
527  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
528}
529
530void
531datalink_NCPUp(struct datalink *dl)
532{
533  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
534
535  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
536    /* we've authenticated in multilink mode ! */
537    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
538      case MP_LINKSENT:
539        /* We've handed the link off to another ppp (well, we will soon) ! */
540        return;
541      case MP_UP:
542        /* First link in the bundle */
543        auth_Select(dl->bundle, dl->peer.authname);
544        /* fall through */
545      case MP_ADDED:
546        /* We're in multilink mode ! */
547        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
548        break;
549      case MP_FAILED:
550        datalink_AuthNotOk(dl);
551        return;
552    }
553  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
554    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
555    datalink_NewState(dl, DATALINK_OPEN);
556    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
557    return;
558  } else {
559    dl->bundle->ncp.mp.peer = dl->peer;
560    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
561    auth_Select(dl->bundle, dl->peer.authname);
562  }
563
564  if (ccpok) {
565    fsm_Up(&dl->physical->link.ccp.fsm);
566    fsm_Open(&dl->physical->link.ccp.fsm);
567  }
568  datalink_NewState(dl, DATALINK_OPEN);
569  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
570  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
571}
572
573void
574datalink_CBCPComplete(struct datalink *dl)
575{
576  datalink_NewState(dl, DATALINK_LCP);
577  datalink_AuthReInit(dl);
578  fsm_Close(&dl->physical->link.lcp.fsm);
579}
580
581void
582datalink_CBCPFailed(struct datalink *dl)
583{
584  cbcp_Down(&dl->cbcp);
585  datalink_CBCPComplete(dl);
586}
587
588void
589datalink_AuthOk(struct datalink *dl)
590{
591  if ((dl->physical->link.lcp.his_callback.opmask &
592       CALLBACK_BIT(CALLBACK_CBCP) ||
593       dl->physical->link.lcp.want_callback.opmask &
594       CALLBACK_BIT(CALLBACK_CBCP)) &&
595      !(dl->physical->link.lcp.want_callback.opmask &
596        CALLBACK_BIT(CALLBACK_AUTH))) {
597    /* We must have agreed CBCP if AUTH isn't there any more */
598    datalink_NewState(dl, DATALINK_CBCP);
599    cbcp_Up(&dl->cbcp);
600  } else if (dl->physical->link.lcp.want_callback.opmask) {
601    /* It's not CBCP */
602    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
603    datalink_NewState(dl, DATALINK_LCP);
604    datalink_AuthReInit(dl);
605    fsm_Close(&dl->physical->link.lcp.fsm);
606  } else
607    switch (dl->physical->link.lcp.his_callback.opmask) {
608      case 0:
609        datalink_NCPUp(dl);
610        break;
611
612      case CALLBACK_BIT(CALLBACK_AUTH):
613        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
614                          sizeof dl->cbcp.fsm.phone);
615        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
616          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
617                     dl->peer.authname);
618          *dl->cbcp.fsm.phone = '\0';
619        } else {
620          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
621          if (ptr)
622            *ptr = '\0';	/* Call back on the first number */
623          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
624                     dl->cbcp.fsm.phone);
625          dl->cbcp.required = 1;
626        }
627        dl->cbcp.fsm.delay = 0;
628        datalink_NewState(dl, DATALINK_LCP);
629        datalink_AuthReInit(dl);
630        fsm_Close(&dl->physical->link.lcp.fsm);
631        break;
632
633      case CALLBACK_BIT(CALLBACK_E164):
634        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
635                sizeof dl->cbcp.fsm.phone - 1);
636        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
637        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
638                   dl->cbcp.fsm.phone);
639        dl->cbcp.required = 1;
640        dl->cbcp.fsm.delay = 0;
641        datalink_NewState(dl, DATALINK_LCP);
642        datalink_AuthReInit(dl);
643        fsm_Close(&dl->physical->link.lcp.fsm);
644        break;
645
646      default:
647        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
648                   dl->name);
649        datalink_NewState(dl, DATALINK_LCP);
650        datalink_AuthReInit(dl);
651        fsm_Close(&dl->physical->link.lcp.fsm);
652        break;
653    }
654}
655
656void
657datalink_AuthNotOk(struct datalink *dl)
658{
659  datalink_NewState(dl, DATALINK_LCP);
660  datalink_AuthReInit(dl);
661  fsm_Close(&dl->physical->link.lcp.fsm);
662}
663
664static void
665datalink_LayerDown(void *v, struct fsm *fp)
666{
667  /* The given FSM has been told to come down */
668  struct datalink *dl = (struct datalink *)v;
669
670  if (fp->proto == PROTO_LCP) {
671    switch (dl->state) {
672      case DATALINK_OPEN:
673        peerid_Init(&dl->peer);
674        fsm2initial(&dl->physical->link.ccp.fsm);
675        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
676        (*dl->parent->LayerDown)(dl->parent->object, fp);
677        /* fall through (just in case) */
678
679      case DATALINK_CBCP:
680        if (!dl->cbcp.required)
681          cbcp_Down(&dl->cbcp);
682        /* fall through (just in case) */
683
684      case DATALINK_AUTH:
685        timer_Stop(&dl->pap.authtimer);
686        timer_Stop(&dl->chap.auth.authtimer);
687    }
688    datalink_NewState(dl, DATALINK_LCP);
689    datalink_AuthReInit(dl);
690  }
691}
692
693static void
694datalink_LayerFinish(void *v, struct fsm *fp)
695{
696  /* The given fsm is now down */
697  struct datalink *dl = (struct datalink *)v;
698
699  if (fp->proto == PROTO_LCP) {
700    fsm2initial(fp);
701    (*dl->parent->LayerFinish)(dl->parent->object, fp);
702    datalink_ComeDown(dl, CLOSE_NORMAL);
703  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
704    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
705}
706
707struct datalink *
708datalink_Create(const char *name, struct bundle *bundle, int type)
709{
710  struct datalink *dl;
711
712  dl = (struct datalink *)malloc(sizeof(struct datalink));
713  if (dl == NULL)
714    return dl;
715
716  dl->desc.type = DATALINK_DESCRIPTOR;
717  dl->desc.UpdateSet = datalink_UpdateSet;
718  dl->desc.IsSet = datalink_IsSet;
719  dl->desc.Read = datalink_Read;
720  dl->desc.Write = datalink_Write;
721
722  dl->state = DATALINK_CLOSED;
723
724  *dl->cfg.script.dial = '\0';
725  *dl->cfg.script.login = '\0';
726  *dl->cfg.script.hangup = '\0';
727  *dl->cfg.phone.list = '\0';
728  *dl->phone.list = '\0';
729  dl->phone.next = NULL;
730  dl->phone.alt = NULL;
731  dl->phone.chosen = "N/A";
732  dl->stayonline = 0;
733  dl->script.run = 1;
734  dl->script.packetmode = 1;
735  mp_linkInit(&dl->mp);
736
737  dl->bundle = bundle;
738  dl->next = NULL;
739
740  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
741
742  dl->dial.tries = 0;
743  dl->cfg.dial.max = 1;
744  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
745  dl->cfg.dial.timeout = DIAL_TIMEOUT;
746  dl->cfg.dial.inc = 0;
747  dl->cfg.dial.maxinc = 10;
748
749  dl->reconnect_tries = 0;
750  dl->cfg.reconnect.max = 0;
751  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
752
753  dl->cfg.callback.opmask = 0;
754  dl->cfg.cbcp.delay = 0;
755  *dl->cfg.cbcp.phone = '\0';
756  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
757
758  dl->name = strdup(name);
759  peerid_Init(&dl->peer);
760  dl->parent = &bundle->fsm;
761  dl->fsmp.LayerStart = datalink_LayerStart;
762  dl->fsmp.LayerUp = datalink_LayerUp;
763  dl->fsmp.LayerDown = datalink_LayerDown;
764  dl->fsmp.LayerFinish = datalink_LayerFinish;
765  dl->fsmp.object = dl;
766
767  if ((dl->physical = physical_Create(dl, type)) == NULL) {
768    free(dl->name);
769    free(dl);
770    return NULL;
771  }
772
773  pap_Init(&dl->pap, dl->physical);
774  chap_Init(&dl->chap, dl->physical);
775  cbcp_Init(&dl->cbcp, dl->physical);
776  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
777
778  log_Printf(LogPHASE, "%s: Created in %s state\n",
779             dl->name, datalink_State(dl));
780
781  return dl;
782}
783
784struct datalink *
785datalink_Clone(struct datalink *odl, const char *name)
786{
787  struct datalink *dl;
788
789  dl = (struct datalink *)malloc(sizeof(struct datalink));
790  if (dl == NULL)
791    return dl;
792
793  dl->desc.type = DATALINK_DESCRIPTOR;
794  dl->desc.UpdateSet = datalink_UpdateSet;
795  dl->desc.IsSet = datalink_IsSet;
796  dl->desc.Read = datalink_Read;
797  dl->desc.Write = datalink_Write;
798
799  dl->state = DATALINK_CLOSED;
800
801  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
802  mp_linkInit(&dl->mp);
803  *dl->phone.list = '\0';
804  dl->phone.next = NULL;
805  dl->phone.alt = NULL;
806  dl->phone.chosen = "N/A";
807  dl->bundle = odl->bundle;
808  dl->next = NULL;
809  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
810  dl->dial.tries = 0;
811  dl->reconnect_tries = 0;
812  dl->name = strdup(name);
813  peerid_Init(&dl->peer);
814  dl->parent = odl->parent;
815  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
816  dl->fsmp.object = dl;
817
818  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
819    free(dl->name);
820    free(dl);
821    return NULL;
822  }
823  pap_Init(&dl->pap, dl->physical);
824  dl->pap.cfg = odl->pap.cfg;
825
826  chap_Init(&dl->chap, dl->physical);
827  dl->chap.auth.cfg = odl->chap.auth.cfg;
828
829  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
830  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
831         sizeof dl->physical->link.lcp.cfg);
832  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
833         sizeof dl->physical->link.ccp.cfg);
834  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
835         sizeof dl->physical->async.cfg);
836
837  cbcp_Init(&dl->cbcp, dl->physical);
838  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
839
840  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
841             dl->name, datalink_State(dl));
842
843  return dl;
844}
845
846struct datalink *
847datalink_Destroy(struct datalink *dl)
848{
849  struct datalink *result;
850
851  if (dl->state != DATALINK_CLOSED) {
852    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
853              datalink_State(dl));
854    switch (dl->state) {
855      case DATALINK_HANGUP:
856      case DATALINK_DIAL:
857      case DATALINK_LOGIN:
858        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
859        break;
860    }
861  }
862
863  timer_Stop(&dl->dial.timer);
864  result = dl->next;
865  physical_Destroy(dl->physical);
866  free(dl->name);
867  free(dl);
868
869  return result;
870}
871
872void
873datalink_Up(struct datalink *dl, int runscripts, int packetmode)
874{
875  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
876    /* Ignore scripts */
877    runscripts = 0;
878
879  switch (dl->state) {
880    case DATALINK_CLOSED:
881      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
882          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
883        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
884      datalink_NewState(dl, DATALINK_OPENING);
885      dl->reconnect_tries =
886        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
887      dl->dial.tries = dl->cfg.dial.max;
888      dl->script.run = runscripts;
889      dl->script.packetmode = packetmode;
890      break;
891
892    case DATALINK_OPENING:
893      if (!dl->script.run && runscripts)
894        dl->script.run = 1;
895      /* fall through */
896
897    case DATALINK_DIAL:
898    case DATALINK_LOGIN:
899    case DATALINK_READY:
900      if (!dl->script.packetmode && packetmode) {
901        dl->script.packetmode = 1;
902        if (dl->state == DATALINK_READY)
903          datalink_LoginDone(dl);
904      }
905      break;
906  }
907}
908
909void
910datalink_Close(struct datalink *dl, int how)
911{
912  /* Please close */
913  switch (dl->state) {
914    case DATALINK_OPEN:
915      peerid_Init(&dl->peer);
916      fsm2initial(&dl->physical->link.ccp.fsm);
917      /* fall through */
918
919    case DATALINK_CBCP:
920    case DATALINK_AUTH:
921    case DATALINK_LCP:
922      datalink_AuthReInit(dl);
923      fsm_Close(&dl->physical->link.lcp.fsm);
924      if (how != CLOSE_NORMAL) {
925        dl->dial.tries = -1;
926        dl->reconnect_tries = 0;
927        if (how == CLOSE_LCP)
928          dl->stayonline = 1;
929      }
930      break;
931
932    default:
933      datalink_ComeDown(dl, how);
934  }
935}
936
937void
938datalink_Down(struct datalink *dl, int how)
939{
940  /* Carrier is lost */
941  switch (dl->state) {
942    case DATALINK_OPEN:
943      peerid_Init(&dl->peer);
944      fsm2initial(&dl->physical->link.ccp.fsm);
945      /* fall through */
946
947    case DATALINK_CBCP:
948    case DATALINK_AUTH:
949    case DATALINK_LCP:
950      fsm2initial(&dl->physical->link.lcp.fsm);
951      /* fall through */
952
953    default:
954      datalink_ComeDown(dl, how);
955  }
956}
957
958void
959datalink_StayDown(struct datalink *dl)
960{
961  dl->reconnect_tries = 0;
962}
963
964void
965datalink_DontHangup(struct datalink *dl)
966{
967  if (dl->state >= DATALINK_LCP)
968    dl->stayonline = 1;
969}
970
971int
972datalink_Show(struct cmdargs const *arg)
973{
974  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
975  prompt_Printf(arg->prompt, " State:              %s\n",
976                datalink_State(arg->cx));
977  prompt_Printf(arg->prompt, " Peer name:          ");
978  if (*arg->cx->peer.authname)
979    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
980  else if (arg->cx->state == DATALINK_OPEN)
981    prompt_Printf(arg->prompt, "None requested\n");
982  else
983    prompt_Printf(arg->prompt, "N/A\n");
984  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
985                mp_Enddisc(arg->cx->peer.enddisc.class,
986                           arg->cx->peer.enddisc.address,
987                           arg->cx->peer.enddisc.len));
988
989  prompt_Printf(arg->prompt, "\nDefaults:\n");
990  prompt_Printf(arg->prompt, " Phone List:         %s\n",
991                arg->cx->cfg.phone.list);
992  if (arg->cx->cfg.dial.max)
993    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
994                  arg->cx->cfg.dial.max);
995  else
996    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
997  if (arg->cx->cfg.dial.next_timeout >= 0)
998    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
999  else
1000    prompt_Printf(arg->prompt, "random/");
1001  if (arg->cx->cfg.dial.timeout >= 0)
1002    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1003  else
1004    prompt_Printf(arg->prompt, "random\n");
1005  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1006                arg->cx->cfg.reconnect.max);
1007  if (arg->cx->cfg.reconnect.timeout > 0)
1008    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1009  else
1010    prompt_Printf(arg->prompt, "random\n");
1011  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1012                PHYS_DIRECT ?  "accepted: " : "requested:");
1013  if (!arg->cx->cfg.callback.opmask)
1014    prompt_Printf(arg->prompt, "none\n");
1015  else {
1016    int comma = 0;
1017
1018    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1019      prompt_Printf(arg->prompt, "none");
1020      comma = 1;
1021    }
1022    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1023      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1024      comma = 1;
1025    }
1026    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1027      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1028      if (arg->cx->physical->type != PHYS_DIRECT)
1029        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1030      comma = 1;
1031    }
1032    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1033      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1034      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1035                    arg->cx->cfg.cbcp.delay);
1036      prompt_Printf(arg->prompt, "                     phone: ");
1037      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1038        if (arg->cx->physical->type & PHYS_DIRECT)
1039          prompt_Printf(arg->prompt, "Caller decides\n");
1040        else
1041          prompt_Printf(arg->prompt, "Dialback server decides\n");
1042      } else
1043        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1044      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1045                    arg->cx->cfg.cbcp.fsmretry);
1046    } else
1047      prompt_Printf(arg->prompt, "\n");
1048  }
1049
1050  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1051                arg->cx->cfg.script.dial);
1052  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1053                arg->cx->cfg.script.login);
1054  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1055                arg->cx->cfg.script.hangup);
1056  return 0;
1057}
1058
1059int
1060datalink_SetReconnect(struct cmdargs const *arg)
1061{
1062  if (arg->argc == arg->argn+2) {
1063    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1064    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1065    return 0;
1066  }
1067  return -1;
1068}
1069
1070int
1071datalink_SetRedial(struct cmdargs const *arg)
1072{
1073  const char *sep, *osep;
1074  int timeout, inc, maxinc, tries;
1075
1076  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1077    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1078	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1079      arg->cx->cfg.dial.timeout = -1;
1080      randinit();
1081    } else {
1082      timeout = atoi(arg->argv[arg->argn]);
1083
1084      if (timeout >= 0)
1085	arg->cx->cfg.dial.timeout = timeout;
1086      else {
1087	log_Printf(LogWARN, "Invalid redial timeout\n");
1088	return -1;
1089      }
1090    }
1091
1092    sep = strchr(arg->argv[arg->argn], '+');
1093    if (sep) {
1094      inc = atoi(++sep);
1095      osep = sep;
1096      if (inc >= 0)
1097        arg->cx->cfg.dial.inc = inc;
1098      else {
1099        log_Printf(LogWARN, "Invalid timeout increment\n");
1100        return -1;
1101      }
1102      sep = strchr(sep, '-');
1103      if (sep) {
1104        maxinc = atoi(++sep);
1105        if (maxinc >= 0)
1106          arg->cx->cfg.dial.maxinc = maxinc;
1107        else {
1108          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1109          return -1;
1110        }
1111      } else {
1112        /* Default timeout increment */
1113        arg->cx->cfg.dial.maxinc = 10;
1114        sep = osep;
1115      }
1116    } else {
1117      /* Default timeout increment & max increment */
1118      arg->cx->cfg.dial.inc = 0;
1119      arg->cx->cfg.dial.maxinc = 10;
1120      sep = arg->argv[arg->argn];
1121    }
1122
1123    sep = strchr(sep, '.');
1124    if (sep) {
1125      if (strcasecmp(++sep, "random") == 0) {
1126	arg->cx->cfg.dial.next_timeout = -1;
1127	randinit();
1128      } else {
1129	timeout = atoi(sep);
1130	if (timeout >= 0)
1131	  arg->cx->cfg.dial.next_timeout = timeout;
1132	else {
1133	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1134	  return -1;
1135	}
1136      }
1137    } else
1138      /* Default next timeout */
1139      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1140
1141    if (arg->argc == arg->argn+2) {
1142      tries = atoi(arg->argv[arg->argn+1]);
1143
1144      if (tries >= 0) {
1145	arg->cx->cfg.dial.max = tries;
1146      } else {
1147	log_Printf(LogWARN, "Invalid retry value\n");
1148	return 1;
1149      }
1150    }
1151    return 0;
1152  }
1153
1154  return -1;
1155}
1156
1157static const char *states[] = {
1158  "closed",
1159  "opening",
1160  "hangup",
1161  "dial",
1162  "login",
1163  "ready",
1164  "lcp",
1165  "auth",
1166  "cbcp",
1167  "open"
1168};
1169
1170const char *
1171datalink_State(struct datalink *dl)
1172{
1173  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1174    return "unknown";
1175  return states[dl->state];
1176}
1177
1178static void
1179datalink_NewState(struct datalink *dl, int state)
1180{
1181  if (state != dl->state) {
1182    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1183      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1184                 states[state]);
1185      dl->state = state;
1186    } else
1187      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1188  }
1189}
1190
1191struct datalink *
1192iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1193             int fd)
1194{
1195  struct datalink *dl, *cdl;
1196  struct fsm_retry copy;
1197  char *oname;
1198
1199  dl = (struct datalink *)iov[(*niov)++].iov_base;
1200  dl->name = iov[*niov].iov_base;
1201
1202  if (dl->name[DATALINK_MAXNAME-1]) {
1203    dl->name[DATALINK_MAXNAME-1] = '\0';
1204    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1205      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1206  }
1207
1208  /* Make sure the name is unique ! */
1209  oname = NULL;
1210  do {
1211    for (cdl = bundle->links; cdl; cdl = cdl->next)
1212      if (!strcasecmp(dl->name, cdl->name)) {
1213        if (oname)
1214          free(datalink_NextName(dl));
1215        else
1216          oname = datalink_NextName(dl);
1217        break;	/* Keep renaming 'till we have no conflicts */
1218      }
1219  } while (cdl);
1220
1221  if (oname) {
1222    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1223    free(oname);
1224  } else {
1225    dl->name = strdup(dl->name);
1226    free(iov[*niov].iov_base);
1227  }
1228  (*niov)++;
1229
1230  dl->desc.type = DATALINK_DESCRIPTOR;
1231  dl->desc.UpdateSet = datalink_UpdateSet;
1232  dl->desc.IsSet = datalink_IsSet;
1233  dl->desc.Read = datalink_Read;
1234  dl->desc.Write = datalink_Write;
1235
1236  mp_linkInit(&dl->mp);
1237  *dl->phone.list = '\0';
1238  dl->phone.next = NULL;
1239  dl->phone.alt = NULL;
1240  dl->phone.chosen = "N/A";
1241
1242  dl->bundle = bundle;
1243  dl->next = NULL;
1244  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1245  dl->dial.tries = 0;
1246  dl->reconnect_tries = 0;
1247  dl->parent = &bundle->fsm;
1248  dl->fsmp.LayerStart = datalink_LayerStart;
1249  dl->fsmp.LayerUp = datalink_LayerUp;
1250  dl->fsmp.LayerDown = datalink_LayerDown;
1251  dl->fsmp.LayerFinish = datalink_LayerFinish;
1252  dl->fsmp.object = dl;
1253
1254  dl->physical = iov2physical(dl, iov, niov, maxiov, fd);
1255
1256  if (!dl->physical) {
1257    free(dl->name);
1258    free(dl);
1259    dl = NULL;
1260  } else {
1261    copy = dl->pap.cfg.fsm;
1262    pap_Init(&dl->pap, dl->physical);
1263    dl->pap.cfg.fsm = copy;
1264
1265    copy = dl->chap.auth.cfg.fsm;
1266    chap_Init(&dl->chap, dl->physical);
1267    dl->chap.auth.cfg.fsm = copy;
1268
1269    cbcp_Init(&dl->cbcp, dl->physical);
1270    chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
1271
1272    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1273              dl->name, datalink_State(dl));
1274  }
1275
1276  return dl;
1277}
1278
1279int
1280datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1281             pid_t newpid)
1282{
1283  /* If `dl' is NULL, we're allocating before a Fromiov() */
1284  int link_fd;
1285
1286  if (dl) {
1287    timer_Stop(&dl->dial.timer);
1288    /* The following is purely for the sake of paranoia */
1289    cbcp_Down(&dl->cbcp);
1290    timer_Stop(&dl->pap.authtimer);
1291    timer_Stop(&dl->chap.auth.authtimer);
1292  }
1293
1294  if (*niov >= maxiov - 1) {
1295    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1296    if (dl) {
1297      free(dl->name);
1298      free(dl);
1299    }
1300    return -1;
1301  }
1302
1303  iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl);
1304  iov[(*niov)++].iov_len = sizeof *dl;
1305  iov[*niov].iov_base =
1306    dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME);
1307  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1308
1309  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, newpid);
1310
1311  if (link_fd == -1 && dl) {
1312    free(dl->name);
1313    free(dl);
1314  }
1315
1316  return link_fd;
1317}
1318
1319void
1320datalink_Rename(struct datalink *dl, const char *name)
1321{
1322  free(dl->name);
1323  dl->physical->link.name = dl->name = strdup(name);
1324}
1325
1326char *
1327datalink_NextName(struct datalink *dl)
1328{
1329  int f, n;
1330  char *name, *oname;
1331
1332  n = strlen(dl->name);
1333  name = (char *)malloc(n+3);
1334  for (f = n - 1; f >= 0; f--)
1335    if (!isdigit(dl->name[f]))
1336      break;
1337  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1338  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1339  oname = dl->name;
1340  dl->name = name;
1341  /* our physical link name isn't updated (it probably isn't created yet) */
1342  return oname;
1343}
1344
1345int
1346datalink_SetMode(struct datalink *dl, int mode)
1347{
1348  if (!physical_SetMode(dl->physical, mode))
1349    return 0;
1350  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1351    dl->script.run = 0;
1352  if (dl->physical->type == PHYS_DIRECT)
1353    dl->reconnect_tries = 0;
1354  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND) && dl->state <= DATALINK_READY)
1355    datalink_Up(dl, 1, 1);
1356  return 1;
1357}
1358
1359int
1360datalink_GetDialTimeout(struct datalink *dl)
1361{
1362  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1363
1364  if (dl->dial.incs < dl->cfg.dial.maxinc)
1365    dl->dial.incs++;
1366
1367  return result;
1368}
1369