datalink.c revision 53830 
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: head/usr.sbin/ppp/datalink.c 53830 1999-11-28 15:50:08Z brian $
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  chat_Destroy(&dl->chat);
124  physical_Close(dl->physical);
125  dl->phone.chosen = "N/A";
126
127  if (dl->cbcp.required) {
128    log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
129    dl->cfg.callback.opmask = 0;
130    strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
131            sizeof dl->cfg.phone.list - 1);
132    dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
133    dl->phone.alt = dl->phone.next = NULL;
134    dl->reconnect_tries = dl->cfg.reconnect.max;
135    dl->dial.tries = dl->cfg.dial.max;
136    dl->dial.incs = 0;
137    dl->script.run = 1;
138    dl->script.packetmode = 1;
139    if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
140      log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
141    bundle_LinksRemoved(dl->bundle);
142    /* if dial.timeout is < 0 (random), we don't override fsm.delay */
143    if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
144      dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
145    datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
146    cbcp_Down(&dl->cbcp);
147    datalink_NewState(dl, DATALINK_OPENING);
148    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
149        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
150      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
151  } else if (dl->bundle->CleaningUp ||
152      (dl->physical->type == PHYS_DIRECT) ||
153      ((!dl->dial.tries || (dl->dial.tries < 0 && !dl->reconnect_tries)) &&
154       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
155    datalink_NewState(dl, DATALINK_CLOSED);
156    dl->dial.tries = -1;
157    dl->dial.incs = 0;
158    dl->reconnect_tries = 0;
159    bundle_LinkClosed(dl->bundle, dl);
160    if (!dl->bundle->CleaningUp)
161      datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
162  } else {
163    datalink_NewState(dl, DATALINK_OPENING);
164    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
165        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
166      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
167    if (dl->dial.tries < 0) {
168      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
169      dl->dial.tries = dl->cfg.dial.max;
170      dl->dial.incs = 0;
171      dl->reconnect_tries--;
172    } else {
173      if (dl->phone.next == NULL)
174        datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
175      else
176        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
177    }
178  }
179}
180
181const char *
182datalink_ChoosePhoneNumber(struct datalink *dl)
183{
184  char *phone;
185
186  if (dl->phone.alt == NULL) {
187    if (dl->phone.next == NULL) {
188      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
189      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
190      if (*dl->phone.list == '\0')
191        return "";
192      dl->phone.next = dl->phone.list;
193    }
194    dl->phone.alt = strsep(&dl->phone.next, ":");
195  }
196  phone = strsep(&dl->phone.alt, "|");
197  dl->phone.chosen = *phone ? phone : "[NONE]";
198  if (*phone)
199    log_Printf(LogPHASE, "Phone: %s\n", phone);
200  return phone;
201}
202
203static void
204datalink_LoginDone(struct datalink *dl)
205{
206  chat_Destroy(&dl->chat);
207
208  if (!dl->script.packetmode) {
209    dl->dial.tries = -1;
210    dl->dial.incs = 0;
211    datalink_NewState(dl, DATALINK_READY);
212  } else if (!physical_Raw(dl->physical)) {
213    dl->dial.tries = 0;
214    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
215    if (dl->script.run) {
216      datalink_NewState(dl, DATALINK_LOGOUT);
217      chat_Init(&dl->chat, dl->physical, dl->cfg.script.logout, NULL);
218    } else {
219      physical_StopDeviceTimer(dl->physical);
220      if (dl->physical->type == PHYS_DEDICATED)
221        /* force a redial timeout */
222        physical_Close(dl->physical);
223      datalink_HangupDone(dl);
224    }
225  } else {
226    dl->dial.tries = -1;
227    dl->dial.incs = 0;
228
229    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
230    async_Init(&dl->physical->async);
231
232    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
233              0 : dl->physical->link.lcp.cfg.openmode);
234    ccp_Setup(&dl->physical->link.ccp);
235
236    datalink_NewState(dl, DATALINK_LCP);
237    fsm_Up(&dl->physical->link.lcp.fsm);
238    fsm_Open(&dl->physical->link.lcp.fsm);
239  }
240}
241
242static int
243datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
244                   int *n)
245{
246  struct datalink *dl = descriptor2datalink(d);
247  int result;
248
249  result = 0;
250  switch (dl->state) {
251    case DATALINK_CLOSED:
252      if ((dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|
253                                 PHYS_FOREGROUND|PHYS_DDIAL)) &&
254          !dl->bundle->CleaningUp)
255        /*
256         * Our first time in - DEDICATED & DDIAL never come down, and
257         * DIRECT, FOREGROUND & BACKGROUND get deleted when they enter
258         * DATALINK_CLOSED.  Go to DATALINK_OPENING via datalink_Up()
259         * and fall through.
260         */
261        datalink_Up(dl, 1, 1);
262      else
263        break;
264      /* fall through */
265
266    case DATALINK_OPENING:
267      if (dl->dial.timer.state != TIMER_RUNNING) {
268        if (--dl->dial.tries < 0)
269          dl->dial.tries = 0;
270        if (physical_Open(dl->physical, dl->bundle) >= 0) {
271          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
272                           "Type `~?' for help\r\n", dl->name,
273                           dl->physical->name.full);
274          if (dl->script.run) {
275            datalink_NewState(dl, DATALINK_DIAL);
276            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial,
277                      *dl->cfg.script.dial ?
278                      datalink_ChoosePhoneNumber(dl) : "");
279            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
280                dl->cfg.dial.max)
281              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
282                        dl->name, dl->cfg.dial.max - dl->dial.tries,
283                        dl->cfg.dial.max);
284          } else
285            datalink_NewState(dl, DATALINK_CARRIER);
286          return datalink_UpdateSet(d, r, w, e, n);
287        } else {
288          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
289              dl->cfg.dial.max)
290            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
291                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
292          else
293            log_Printf(LogCHAT, "Failed to open device\n");
294
295          if (dl->bundle->CleaningUp ||
296              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
297               dl->cfg.dial.max && dl->dial.tries == 0)) {
298            datalink_NewState(dl, DATALINK_CLOSED);
299            dl->reconnect_tries = 0;
300            dl->dial.tries = -1;
301            log_WritePrompts(dl, "Failed to open %s\n",
302                             dl->physical->name.full);
303            bundle_LinkClosed(dl->bundle, dl);
304          }
305          if (!dl->bundle->CleaningUp) {
306            int timeout;
307
308            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
309            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
310                             dl->physical->name.full, timeout);
311          }
312        }
313      }
314      break;
315
316    case DATALINK_CARRIER:
317      /* Wait for carrier on the device */
318      switch (physical_AwaitCarrier(dl->physical)) {
319        case CARRIER_PENDING:
320          log_Printf(LogDEBUG, "Waiting for carrier\n");
321          return 0;	/* A device timer is running to wake us up again */
322
323        case CARRIER_OK:
324          if (dl->script.run) {
325            datalink_NewState(dl, DATALINK_LOGIN);
326            chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, NULL);
327          } else
328            datalink_LoginDone(dl);
329          return datalink_UpdateSet(d, r, w, e, n);
330
331        case CARRIER_LOST:
332          physical_Offline(dl->physical);	/* Is this required ? */
333          if (dl->script.run) {
334            datalink_NewState(dl, DATALINK_HANGUP);
335            chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
336            return datalink_UpdateSet(d, r, w, e, n);
337          } else {
338            datalink_HangupDone(dl);
339            return 0;	/* Maybe bundle_CleanDatalinks() has something to do */
340          }
341      }
342
343    case DATALINK_HANGUP:
344    case DATALINK_DIAL:
345    case DATALINK_LOGOUT:
346    case DATALINK_LOGIN:
347      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
348      switch (dl->chat.state) {
349        case CHAT_DONE:
350          /* script succeeded */
351          switch(dl->state) {
352            case DATALINK_HANGUP:
353              datalink_HangupDone(dl);
354              break;
355            case DATALINK_DIAL:
356              datalink_NewState(dl, DATALINK_CARRIER);
357              return datalink_UpdateSet(d, r, w, e, n);
358            case DATALINK_LOGOUT:
359              datalink_NewState(dl, DATALINK_HANGUP);
360              physical_Offline(dl->physical);
361              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
362              return datalink_UpdateSet(d, r, w, e, n);
363            case DATALINK_LOGIN:
364              dl->phone.alt = NULL;
365              datalink_LoginDone(dl);
366              return datalink_UpdateSet(d, r, w, e, n);
367          }
368          break;
369        case CHAT_FAILED:
370          /* Going down - script failed */
371          log_Printf(LogWARN, "Chat script failed\n");
372          switch(dl->state) {
373            case DATALINK_HANGUP:
374              datalink_HangupDone(dl);
375              break;
376            case DATALINK_DIAL:
377            case DATALINK_LOGOUT:
378            case DATALINK_LOGIN:
379              datalink_NewState(dl, DATALINK_HANGUP);
380              physical_Offline(dl->physical);
381              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
382              return datalink_UpdateSet(d, r, w, e, n);
383          }
384          break;
385      }
386      break;
387
388    case DATALINK_READY:
389    case DATALINK_LCP:
390    case DATALINK_AUTH:
391    case DATALINK_CBCP:
392    case DATALINK_OPEN:
393      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
394               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
395      break;
396  }
397  return result;
398}
399
400int
401datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
402{
403  return physical_RemoveFromSet(dl->physical, r, w, e);
404}
405
406static int
407datalink_IsSet(struct descriptor *d, const fd_set *fdset)
408{
409  struct datalink *dl = descriptor2datalink(d);
410
411  switch (dl->state) {
412    case DATALINK_CLOSED:
413    case DATALINK_OPENING:
414      break;
415
416    case DATALINK_HANGUP:
417    case DATALINK_DIAL:
418    case DATALINK_LOGOUT:
419    case DATALINK_LOGIN:
420      return descriptor_IsSet(&dl->chat.desc, fdset);
421
422    case DATALINK_READY:
423    case DATALINK_LCP:
424    case DATALINK_AUTH:
425    case DATALINK_CBCP:
426    case DATALINK_OPEN:
427      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
428             descriptor_IsSet(&dl->physical->desc, fdset);
429  }
430  return 0;
431}
432
433static void
434datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
435{
436  struct datalink *dl = descriptor2datalink(d);
437
438  switch (dl->state) {
439    case DATALINK_CLOSED:
440    case DATALINK_OPENING:
441      break;
442
443    case DATALINK_HANGUP:
444    case DATALINK_DIAL:
445    case DATALINK_LOGOUT:
446    case DATALINK_LOGIN:
447      descriptor_Read(&dl->chat.desc, bundle, fdset);
448      break;
449
450    case DATALINK_READY:
451    case DATALINK_LCP:
452    case DATALINK_AUTH:
453    case DATALINK_CBCP:
454    case DATALINK_OPEN:
455      if (descriptor_IsSet(&dl->chap.desc, fdset))
456        descriptor_Read(&dl->chap.desc, bundle, fdset);
457      if (descriptor_IsSet(&dl->physical->desc, fdset))
458        descriptor_Read(&dl->physical->desc, bundle, fdset);
459      break;
460  }
461}
462
463static int
464datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
465{
466  struct datalink *dl = descriptor2datalink(d);
467  int result = 0;
468
469  switch (dl->state) {
470    case DATALINK_CLOSED:
471    case DATALINK_OPENING:
472      break;
473
474    case DATALINK_HANGUP:
475    case DATALINK_DIAL:
476    case DATALINK_LOGOUT:
477    case DATALINK_LOGIN:
478      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
479      break;
480
481    case DATALINK_READY:
482    case DATALINK_LCP:
483    case DATALINK_AUTH:
484    case DATALINK_CBCP:
485    case DATALINK_OPEN:
486      if (descriptor_IsSet(&dl->chap.desc, fdset))
487        result += descriptor_Write(&dl->chap.desc, bundle, fdset);
488      if (descriptor_IsSet(&dl->physical->desc, fdset))
489        result += descriptor_Write(&dl->physical->desc, bundle, fdset);
490      break;
491  }
492
493  return result;
494}
495
496static void
497datalink_ComeDown(struct datalink *dl, int how)
498{
499  if (how != CLOSE_NORMAL) {
500    dl->dial.tries = -1;
501    dl->reconnect_tries = 0;
502    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
503      dl->stayonline = 1;
504  }
505
506  if (dl->state >= DATALINK_READY && dl->stayonline) {
507    dl->stayonline = 0;
508    physical_StopDeviceTimer(dl->physical);
509    datalink_NewState(dl, DATALINK_READY);
510  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
511    physical_Offline(dl->physical);
512    if (dl->script.run && dl->state != DATALINK_OPENING) {
513      if (dl->state == DATALINK_LOGOUT) {
514        datalink_NewState(dl, DATALINK_HANGUP);
515        chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
516      } else {
517        datalink_NewState(dl, DATALINK_LOGOUT);
518        chat_Init(&dl->chat, dl->physical, dl->cfg.script.logout, NULL);
519      }
520    } else
521      datalink_HangupDone(dl);
522  }
523}
524
525static void
526datalink_LayerStart(void *v, struct fsm *fp)
527{
528  /* The given FSM is about to start up ! */
529  struct datalink *dl = (struct datalink *)v;
530
531  if (fp->proto == PROTO_LCP)
532    (*dl->parent->LayerStart)(dl->parent->object, fp);
533}
534
535static void
536datalink_LayerUp(void *v, struct fsm *fp)
537{
538  /* The given fsm is now up */
539  struct datalink *dl = (struct datalink *)v;
540  struct lcp *lcp = &dl->physical->link.lcp;
541
542  if (fp->proto == PROTO_LCP) {
543    datalink_GotAuthname(dl, "");
544    lcp->auth_ineed = lcp->want_auth;
545    lcp->auth_iwait = lcp->his_auth;
546    if (lcp->his_auth || lcp->want_auth) {
547      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
548        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
549      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
550                Auth2Nam(lcp->his_auth, lcp->his_authtype),
551                Auth2Nam(lcp->want_auth, lcp->want_authtype));
552      if (lcp->his_auth == PROTO_PAP)
553        auth_StartReq(&dl->pap);
554      if (lcp->want_auth == PROTO_CHAP)
555        auth_StartReq(&dl->chap.auth);
556    } else
557      datalink_AuthOk(dl);
558  }
559}
560
561static void
562datalink_AuthReInit(struct datalink *dl)
563{
564  auth_StopTimer(&dl->pap);
565  auth_StopTimer(&dl->chap.auth);
566  chap_ReInit(&dl->chap);
567}
568
569void
570datalink_GotAuthname(struct datalink *dl, const char *name)
571{
572  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
573  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
574}
575
576void
577datalink_NCPUp(struct datalink *dl)
578{
579  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
580
581  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
582    /* we've authenticated in multilink mode ! */
583    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
584      case MP_LINKSENT:
585        /* We've handed the link off to another ppp (well, we will soon) ! */
586        return;
587      case MP_UP:
588        /* First link in the bundle */
589        auth_Select(dl->bundle, dl->peer.authname);
590        bundle_CalculateBandwidth(dl->bundle);
591        /* fall through */
592      case MP_ADDED:
593        /* We're in multilink mode ! */
594        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
595        bundle_CalculateBandwidth(dl->bundle);
596        break;
597      case MP_FAILED:
598        datalink_AuthNotOk(dl);
599        return;
600    }
601  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
602    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
603    datalink_NewState(dl, DATALINK_OPEN);
604    bundle_CalculateBandwidth(dl->bundle);
605    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
606    return;
607  } else {
608    dl->bundle->ncp.mp.peer = dl->peer;
609    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
610    auth_Select(dl->bundle, dl->peer.authname);
611  }
612
613  if (ccpok) {
614    fsm_Up(&dl->physical->link.ccp.fsm);
615    fsm_Open(&dl->physical->link.ccp.fsm);
616  }
617  datalink_NewState(dl, DATALINK_OPEN);
618  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
619  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
620}
621
622void
623datalink_CBCPComplete(struct datalink *dl)
624{
625  datalink_NewState(dl, DATALINK_LCP);
626  datalink_AuthReInit(dl);
627  fsm_Close(&dl->physical->link.lcp.fsm);
628}
629
630void
631datalink_CBCPFailed(struct datalink *dl)
632{
633  cbcp_Down(&dl->cbcp);
634  datalink_CBCPComplete(dl);
635}
636
637void
638datalink_AuthOk(struct datalink *dl)
639{
640  if ((dl->physical->link.lcp.his_callback.opmask &
641       CALLBACK_BIT(CALLBACK_CBCP) ||
642       dl->physical->link.lcp.want_callback.opmask &
643       CALLBACK_BIT(CALLBACK_CBCP)) &&
644      !(dl->physical->link.lcp.want_callback.opmask &
645        CALLBACK_BIT(CALLBACK_AUTH))) {
646    /* We must have agreed CBCP if AUTH isn't there any more */
647    datalink_NewState(dl, DATALINK_CBCP);
648    cbcp_Up(&dl->cbcp);
649  } else if (dl->physical->link.lcp.want_callback.opmask) {
650    /* It's not CBCP */
651    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
652    datalink_NewState(dl, DATALINK_LCP);
653    datalink_AuthReInit(dl);
654    fsm_Close(&dl->physical->link.lcp.fsm);
655  } else
656    switch (dl->physical->link.lcp.his_callback.opmask) {
657      case 0:
658        datalink_NCPUp(dl);
659        break;
660
661      case CALLBACK_BIT(CALLBACK_AUTH):
662        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
663                          sizeof dl->cbcp.fsm.phone);
664        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
665          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
666                     dl->peer.authname);
667          *dl->cbcp.fsm.phone = '\0';
668        } else {
669          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
670          if (ptr)
671            *ptr = '\0';	/* Call back on the first number */
672          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
673                     dl->cbcp.fsm.phone);
674          dl->cbcp.required = 1;
675        }
676        dl->cbcp.fsm.delay = 0;
677        datalink_NewState(dl, DATALINK_LCP);
678        datalink_AuthReInit(dl);
679        fsm_Close(&dl->physical->link.lcp.fsm);
680        break;
681
682      case CALLBACK_BIT(CALLBACK_E164):
683        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
684                sizeof dl->cbcp.fsm.phone - 1);
685        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
686        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
687                   dl->cbcp.fsm.phone);
688        dl->cbcp.required = 1;
689        dl->cbcp.fsm.delay = 0;
690        datalink_NewState(dl, DATALINK_LCP);
691        datalink_AuthReInit(dl);
692        fsm_Close(&dl->physical->link.lcp.fsm);
693        break;
694
695      default:
696        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
697                   dl->name);
698        datalink_NewState(dl, DATALINK_LCP);
699        datalink_AuthReInit(dl);
700        fsm_Close(&dl->physical->link.lcp.fsm);
701        break;
702    }
703}
704
705void
706datalink_AuthNotOk(struct datalink *dl)
707{
708  datalink_NewState(dl, DATALINK_LCP);
709  datalink_AuthReInit(dl);
710  fsm_Close(&dl->physical->link.lcp.fsm);
711}
712
713static void
714datalink_LayerDown(void *v, struct fsm *fp)
715{
716  /* The given FSM has been told to come down */
717  struct datalink *dl = (struct datalink *)v;
718
719  if (fp->proto == PROTO_LCP) {
720    switch (dl->state) {
721      case DATALINK_OPEN:
722        peerid_Init(&dl->peer);
723        fsm2initial(&dl->physical->link.ccp.fsm);
724        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
725        (*dl->parent->LayerDown)(dl->parent->object, fp);
726        /* fall through (just in case) */
727
728      case DATALINK_CBCP:
729        if (!dl->cbcp.required)
730          cbcp_Down(&dl->cbcp);
731        /* fall through (just in case) */
732
733      case DATALINK_AUTH:
734        timer_Stop(&dl->pap.authtimer);
735        timer_Stop(&dl->chap.auth.authtimer);
736    }
737    datalink_NewState(dl, DATALINK_LCP);
738    datalink_AuthReInit(dl);
739  }
740}
741
742static void
743datalink_LayerFinish(void *v, struct fsm *fp)
744{
745  /* The given fsm is now down */
746  struct datalink *dl = (struct datalink *)v;
747
748  if (fp->proto == PROTO_LCP) {
749    fsm2initial(fp);
750    (*dl->parent->LayerFinish)(dl->parent->object, fp);
751    datalink_ComeDown(dl, CLOSE_NORMAL);
752  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
753    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
754}
755
756struct datalink *
757datalink_Create(const char *name, struct bundle *bundle, int type)
758{
759  struct datalink *dl;
760
761  dl = (struct datalink *)malloc(sizeof(struct datalink));
762  if (dl == NULL)
763    return dl;
764
765  dl->desc.type = DATALINK_DESCRIPTOR;
766  dl->desc.UpdateSet = datalink_UpdateSet;
767  dl->desc.IsSet = datalink_IsSet;
768  dl->desc.Read = datalink_Read;
769  dl->desc.Write = datalink_Write;
770
771  dl->state = DATALINK_CLOSED;
772
773  *dl->cfg.script.dial = '\0';
774  *dl->cfg.script.login = '\0';
775  *dl->cfg.script.logout = '\0';
776  *dl->cfg.script.hangup = '\0';
777  *dl->cfg.phone.list = '\0';
778  *dl->phone.list = '\0';
779  dl->phone.next = NULL;
780  dl->phone.alt = NULL;
781  dl->phone.chosen = "N/A";
782  dl->stayonline = 0;
783  dl->script.run = 1;
784  dl->script.packetmode = 1;
785  mp_linkInit(&dl->mp);
786
787  dl->bundle = bundle;
788  dl->next = NULL;
789
790  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
791
792  dl->dial.tries = 0;
793  dl->cfg.dial.max = 1;
794  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
795  dl->cfg.dial.timeout = DIAL_TIMEOUT;
796  dl->cfg.dial.inc = 0;
797  dl->cfg.dial.maxinc = 10;
798
799  dl->reconnect_tries = 0;
800  dl->cfg.reconnect.max = 0;
801  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
802
803  dl->cfg.callback.opmask = 0;
804  dl->cfg.cbcp.delay = 0;
805  *dl->cfg.cbcp.phone = '\0';
806  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
807
808  dl->name = strdup(name);
809  peerid_Init(&dl->peer);
810  dl->parent = &bundle->fsm;
811  dl->fsmp.LayerStart = datalink_LayerStart;
812  dl->fsmp.LayerUp = datalink_LayerUp;
813  dl->fsmp.LayerDown = datalink_LayerDown;
814  dl->fsmp.LayerFinish = datalink_LayerFinish;
815  dl->fsmp.object = dl;
816
817  if ((dl->physical = physical_Create(dl, type)) == NULL) {
818    free(dl->name);
819    free(dl);
820    return NULL;
821  }
822
823  pap_Init(&dl->pap, dl->physical);
824  chap_Init(&dl->chap, dl->physical);
825  cbcp_Init(&dl->cbcp, dl->physical);
826
827  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
828  chat_Init(&dl->chat, dl->physical, NULL, NULL);
829
830  log_Printf(LogPHASE, "%s: Created in %s state\n",
831             dl->name, datalink_State(dl));
832
833  return dl;
834}
835
836struct datalink *
837datalink_Clone(struct datalink *odl, const char *name)
838{
839  struct datalink *dl;
840
841  dl = (struct datalink *)malloc(sizeof(struct datalink));
842  if (dl == NULL)
843    return dl;
844
845  dl->desc.type = DATALINK_DESCRIPTOR;
846  dl->desc.UpdateSet = datalink_UpdateSet;
847  dl->desc.IsSet = datalink_IsSet;
848  dl->desc.Read = datalink_Read;
849  dl->desc.Write = datalink_Write;
850
851  dl->state = DATALINK_CLOSED;
852
853  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
854  mp_linkInit(&dl->mp);
855  *dl->phone.list = '\0';
856  dl->phone.next = NULL;
857  dl->phone.alt = NULL;
858  dl->phone.chosen = "N/A";
859  dl->bundle = odl->bundle;
860  dl->next = NULL;
861  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
862  dl->dial.tries = 0;
863  dl->reconnect_tries = 0;
864  dl->name = strdup(name);
865  peerid_Init(&dl->peer);
866  dl->parent = odl->parent;
867  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
868  dl->fsmp.object = dl;
869
870  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
871    free(dl->name);
872    free(dl);
873    return NULL;
874  }
875  pap_Init(&dl->pap, dl->physical);
876  dl->pap.cfg = odl->pap.cfg;
877
878  chap_Init(&dl->chap, dl->physical);
879  dl->chap.auth.cfg = odl->chap.auth.cfg;
880
881  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
882  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
883         sizeof dl->physical->link.lcp.cfg);
884  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
885         sizeof dl->physical->link.ccp.cfg);
886  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
887         sizeof dl->physical->async.cfg);
888
889  cbcp_Init(&dl->cbcp, dl->physical);
890
891  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
892  chat_Init(&dl->chat, dl->physical, NULL, NULL);
893
894  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
895             dl->name, datalink_State(dl));
896
897  return dl;
898}
899
900struct datalink *
901datalink_Destroy(struct datalink *dl)
902{
903  struct datalink *result;
904
905  if (dl->state != DATALINK_CLOSED) {
906    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
907              datalink_State(dl));
908    switch (dl->state) {
909      case DATALINK_HANGUP:
910      case DATALINK_DIAL:
911      case DATALINK_LOGIN:
912        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
913        break;
914    }
915  }
916
917  timer_Stop(&dl->dial.timer);
918  result = dl->next;
919  physical_Destroy(dl->physical);
920  free(dl->name);
921  free(dl);
922
923  return result;
924}
925
926void
927datalink_Up(struct datalink *dl, int runscripts, int packetmode)
928{
929  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
930    /* Ignore scripts */
931    runscripts = 0;
932
933  switch (dl->state) {
934    case DATALINK_CLOSED:
935      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
936          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
937        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
938      datalink_NewState(dl, DATALINK_OPENING);
939      dl->reconnect_tries =
940        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
941      dl->dial.tries = dl->cfg.dial.max;
942      dl->script.run = runscripts;
943      dl->script.packetmode = packetmode;
944      break;
945
946    case DATALINK_OPENING:
947      if (!dl->script.run && runscripts)
948        dl->script.run = 1;
949      /* fall through */
950
951    case DATALINK_DIAL:
952    case DATALINK_LOGIN:
953    case DATALINK_READY:
954      if (!dl->script.packetmode && packetmode) {
955        dl->script.packetmode = 1;
956        if (dl->state == DATALINK_READY)
957          datalink_LoginDone(dl);
958      }
959      break;
960  }
961}
962
963void
964datalink_Close(struct datalink *dl, int how)
965{
966  /* Please close */
967  switch (dl->state) {
968    case DATALINK_OPEN:
969      peerid_Init(&dl->peer);
970      fsm2initial(&dl->physical->link.ccp.fsm);
971      /* fall through */
972
973    case DATALINK_CBCP:
974    case DATALINK_AUTH:
975    case DATALINK_LCP:
976      datalink_AuthReInit(dl);
977      fsm_Close(&dl->physical->link.lcp.fsm);
978      if (how != CLOSE_NORMAL) {
979        dl->dial.tries = -1;
980        dl->reconnect_tries = 0;
981        if (how == CLOSE_LCP)
982          dl->stayonline = 1;
983      }
984      break;
985
986    default:
987      datalink_ComeDown(dl, how);
988  }
989}
990
991void
992datalink_Down(struct datalink *dl, int how)
993{
994  /* Carrier is lost */
995  switch (dl->state) {
996    case DATALINK_OPEN:
997      peerid_Init(&dl->peer);
998      fsm2initial(&dl->physical->link.ccp.fsm);
999      /* fall through */
1000
1001    case DATALINK_CBCP:
1002    case DATALINK_AUTH:
1003    case DATALINK_LCP:
1004      fsm2initial(&dl->physical->link.lcp.fsm);
1005      /* fall through */
1006
1007    default:
1008      datalink_ComeDown(dl, how);
1009  }
1010}
1011
1012void
1013datalink_StayDown(struct datalink *dl)
1014{
1015  dl->reconnect_tries = 0;
1016}
1017
1018void
1019datalink_DontHangup(struct datalink *dl)
1020{
1021  if (dl->state >= DATALINK_LCP)
1022    dl->stayonline = 1;
1023}
1024
1025int
1026datalink_Show(struct cmdargs const *arg)
1027{
1028  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1029  prompt_Printf(arg->prompt, " State:              %s\n",
1030                datalink_State(arg->cx));
1031  prompt_Printf(arg->prompt, " Peer name:          ");
1032  if (*arg->cx->peer.authname)
1033    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1034  else if (arg->cx->state == DATALINK_OPEN)
1035    prompt_Printf(arg->prompt, "None requested\n");
1036  else
1037    prompt_Printf(arg->prompt, "N/A\n");
1038  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1039                mp_Enddisc(arg->cx->peer.enddisc.class,
1040                           arg->cx->peer.enddisc.address,
1041                           arg->cx->peer.enddisc.len));
1042
1043  prompt_Printf(arg->prompt, "\nDefaults:\n");
1044  prompt_Printf(arg->prompt, " Phone List:         %s\n",
1045                arg->cx->cfg.phone.list);
1046  if (arg->cx->cfg.dial.max)
1047    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1048                  arg->cx->cfg.dial.max);
1049  else
1050    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1051  if (arg->cx->cfg.dial.next_timeout >= 0)
1052    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1053  else
1054    prompt_Printf(arg->prompt, "random/");
1055  if (arg->cx->cfg.dial.timeout >= 0)
1056    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1057  else
1058    prompt_Printf(arg->prompt, "random\n");
1059  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1060                arg->cx->cfg.reconnect.max);
1061  if (arg->cx->cfg.reconnect.timeout > 0)
1062    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1063  else
1064    prompt_Printf(arg->prompt, "random\n");
1065  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1066                PHYS_DIRECT ?  "accepted: " : "requested:");
1067  if (!arg->cx->cfg.callback.opmask)
1068    prompt_Printf(arg->prompt, "none\n");
1069  else {
1070    int comma = 0;
1071
1072    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1073      prompt_Printf(arg->prompt, "none");
1074      comma = 1;
1075    }
1076    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1077      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1078      comma = 1;
1079    }
1080    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1081      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1082      if (arg->cx->physical->type != PHYS_DIRECT)
1083        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1084      comma = 1;
1085    }
1086    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1087      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1088      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1089                    arg->cx->cfg.cbcp.delay);
1090      prompt_Printf(arg->prompt, "                     phone: ");
1091      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1092        if (arg->cx->physical->type & PHYS_DIRECT)
1093          prompt_Printf(arg->prompt, "Caller decides\n");
1094        else
1095          prompt_Printf(arg->prompt, "Dialback server decides\n");
1096      } else
1097        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1098      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1099                    arg->cx->cfg.cbcp.fsmretry);
1100    } else
1101      prompt_Printf(arg->prompt, "\n");
1102  }
1103
1104  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1105                arg->cx->cfg.script.dial);
1106  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1107                arg->cx->cfg.script.login);
1108  prompt_Printf(arg->prompt, " Logout Script:      %s\n",
1109                arg->cx->cfg.script.logout);
1110  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1111                arg->cx->cfg.script.hangup);
1112  return 0;
1113}
1114
1115int
1116datalink_SetReconnect(struct cmdargs const *arg)
1117{
1118  if (arg->argc == arg->argn+2) {
1119    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1120    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1121    return 0;
1122  }
1123  return -1;
1124}
1125
1126int
1127datalink_SetRedial(struct cmdargs const *arg)
1128{
1129  const char *sep, *osep;
1130  int timeout, inc, maxinc, tries;
1131
1132  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1133    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1134	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1135      arg->cx->cfg.dial.timeout = -1;
1136      randinit();
1137    } else {
1138      timeout = atoi(arg->argv[arg->argn]);
1139
1140      if (timeout >= 0)
1141	arg->cx->cfg.dial.timeout = timeout;
1142      else {
1143	log_Printf(LogWARN, "Invalid redial timeout\n");
1144	return -1;
1145      }
1146    }
1147
1148    sep = strchr(arg->argv[arg->argn], '+');
1149    if (sep) {
1150      inc = atoi(++sep);
1151      osep = sep;
1152      if (inc >= 0)
1153        arg->cx->cfg.dial.inc = inc;
1154      else {
1155        log_Printf(LogWARN, "Invalid timeout increment\n");
1156        return -1;
1157      }
1158      sep = strchr(sep, '-');
1159      if (sep) {
1160        maxinc = atoi(++sep);
1161        if (maxinc >= 0)
1162          arg->cx->cfg.dial.maxinc = maxinc;
1163        else {
1164          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1165          return -1;
1166        }
1167      } else {
1168        /* Default timeout increment */
1169        arg->cx->cfg.dial.maxinc = 10;
1170        sep = osep;
1171      }
1172    } else {
1173      /* Default timeout increment & max increment */
1174      arg->cx->cfg.dial.inc = 0;
1175      arg->cx->cfg.dial.maxinc = 10;
1176      sep = arg->argv[arg->argn];
1177    }
1178
1179    sep = strchr(sep, '.');
1180    if (sep) {
1181      if (strcasecmp(++sep, "random") == 0) {
1182	arg->cx->cfg.dial.next_timeout = -1;
1183	randinit();
1184      } else {
1185	timeout = atoi(sep);
1186	if (timeout >= 0)
1187	  arg->cx->cfg.dial.next_timeout = timeout;
1188	else {
1189	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1190	  return -1;
1191	}
1192      }
1193    } else
1194      /* Default next timeout */
1195      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1196
1197    if (arg->argc == arg->argn+2) {
1198      tries = atoi(arg->argv[arg->argn+1]);
1199
1200      if (tries >= 0) {
1201	arg->cx->cfg.dial.max = tries;
1202      } else {
1203	log_Printf(LogWARN, "Invalid retry value\n");
1204	return 1;
1205      }
1206    }
1207    return 0;
1208  }
1209
1210  return -1;
1211}
1212
1213static const char *states[] = {
1214  "closed",
1215  "opening",
1216  "hangup",
1217  "dial",
1218  "carrier",
1219  "logout",
1220  "login",
1221  "ready",
1222  "lcp",
1223  "auth",
1224  "cbcp",
1225  "open"
1226};
1227
1228const char *
1229datalink_State(struct datalink *dl)
1230{
1231  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1232    return "unknown";
1233  return states[dl->state];
1234}
1235
1236static void
1237datalink_NewState(struct datalink *dl, int state)
1238{
1239  if (state != dl->state) {
1240    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1241      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1242                 states[state]);
1243      dl->state = state;
1244    } else
1245      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1246  }
1247}
1248
1249struct datalink *
1250iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1251             int fd, int *auxfd, int *nauxfd)
1252{
1253  struct datalink *dl, *cdl;
1254  struct fsm_retry copy;
1255  char *oname;
1256
1257  dl = (struct datalink *)iov[(*niov)++].iov_base;
1258  dl->name = iov[*niov].iov_base;
1259
1260  if (dl->name[DATALINK_MAXNAME-1]) {
1261    dl->name[DATALINK_MAXNAME-1] = '\0';
1262    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1263      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1264  }
1265
1266  /* Make sure the name is unique ! */
1267  oname = NULL;
1268  do {
1269    for (cdl = bundle->links; cdl; cdl = cdl->next)
1270      if (!strcasecmp(dl->name, cdl->name)) {
1271        if (oname)
1272          free(datalink_NextName(dl));
1273        else
1274          oname = datalink_NextName(dl);
1275        break;	/* Keep renaming 'till we have no conflicts */
1276      }
1277  } while (cdl);
1278
1279  if (oname) {
1280    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1281    free(oname);
1282  } else {
1283    dl->name = strdup(dl->name);
1284    free(iov[*niov].iov_base);
1285  }
1286  (*niov)++;
1287
1288  dl->desc.type = DATALINK_DESCRIPTOR;
1289  dl->desc.UpdateSet = datalink_UpdateSet;
1290  dl->desc.IsSet = datalink_IsSet;
1291  dl->desc.Read = datalink_Read;
1292  dl->desc.Write = datalink_Write;
1293
1294  mp_linkInit(&dl->mp);
1295  *dl->phone.list = '\0';
1296  dl->phone.next = NULL;
1297  dl->phone.alt = NULL;
1298  dl->phone.chosen = "N/A";
1299
1300  dl->bundle = bundle;
1301  dl->next = NULL;
1302  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1303  dl->dial.tries = 0;
1304  dl->reconnect_tries = 0;
1305  dl->parent = &bundle->fsm;
1306  dl->fsmp.LayerStart = datalink_LayerStart;
1307  dl->fsmp.LayerUp = datalink_LayerUp;
1308  dl->fsmp.LayerDown = datalink_LayerDown;
1309  dl->fsmp.LayerFinish = datalink_LayerFinish;
1310  dl->fsmp.object = dl;
1311
1312  dl->physical = iov2physical(dl, iov, niov, maxiov, fd, auxfd, nauxfd);
1313
1314  if (!dl->physical) {
1315    free(dl->name);
1316    free(dl);
1317    dl = NULL;
1318  } else {
1319    copy = dl->pap.cfg.fsm;
1320    pap_Init(&dl->pap, dl->physical);
1321    dl->pap.cfg.fsm = copy;
1322
1323    copy = dl->chap.auth.cfg.fsm;
1324    chap_Init(&dl->chap, dl->physical);
1325    dl->chap.auth.cfg.fsm = copy;
1326
1327    cbcp_Init(&dl->cbcp, dl->physical);
1328
1329    memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
1330    chat_Init(&dl->chat, dl->physical, NULL, NULL);
1331
1332    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1333              dl->name, datalink_State(dl));
1334  }
1335
1336  return dl;
1337}
1338
1339int
1340datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1341             int *auxfd, int *nauxfd)
1342{
1343  /* If `dl' is NULL, we're allocating before a Fromiov() */
1344  int link_fd;
1345
1346  if (dl) {
1347    timer_Stop(&dl->dial.timer);
1348    /* The following is purely for the sake of paranoia */
1349    cbcp_Down(&dl->cbcp);
1350    timer_Stop(&dl->pap.authtimer);
1351    timer_Stop(&dl->chap.auth.authtimer);
1352  }
1353
1354  if (*niov >= maxiov - 1) {
1355    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1356    if (dl) {
1357      free(dl->name);
1358      free(dl);
1359    }
1360    return -1;
1361  }
1362
1363  iov[*niov].iov_base = (void *)dl;
1364  iov[(*niov)++].iov_len = sizeof *dl;
1365  iov[*niov].iov_base = dl ? realloc(dl->name, DATALINK_MAXNAME) : NULL;
1366  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1367
1368  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, auxfd,
1369                         nauxfd);
1370
1371  if (link_fd == -1 && dl) {
1372    free(dl->name);
1373    free(dl);
1374  }
1375
1376  return link_fd;
1377}
1378
1379void
1380datalink_Rename(struct datalink *dl, const char *name)
1381{
1382  free(dl->name);
1383  dl->physical->link.name = dl->name = strdup(name);
1384}
1385
1386char *
1387datalink_NextName(struct datalink *dl)
1388{
1389  int f, n;
1390  char *name, *oname;
1391
1392  n = strlen(dl->name);
1393  name = (char *)malloc(n+3);
1394  for (f = n - 1; f >= 0; f--)
1395    if (!isdigit(dl->name[f]))
1396      break;
1397  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1398  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1399  oname = dl->name;
1400  dl->name = name;
1401  /* our physical link name isn't updated (it probably isn't created yet) */
1402  return oname;
1403}
1404
1405int
1406datalink_SetMode(struct datalink *dl, int mode)
1407{
1408  if (!physical_SetMode(dl->physical, mode))
1409    return 0;
1410  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1411    dl->script.run = 0;
1412  if (dl->physical->type == PHYS_DIRECT)
1413    dl->reconnect_tries = 0;
1414  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND|PHYS_FOREGROUND) &&
1415      dl->state <= DATALINK_READY)
1416    datalink_Up(dl, 1, 1);
1417  return 1;
1418}
1419
1420int
1421datalink_GetDialTimeout(struct datalink *dl)
1422{
1423  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1424
1425  if (dl->dial.incs < dl->cfg.dial.maxinc)
1426    dl->dial.incs++;
1427
1428  return result;
1429}
1430