1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31#include <sys/param.h>
32#include <netinet/in.h>
33#include <netinet/in_systm.h>
34#include <netinet/ip.h>
35#include <sys/socket.h>
36#include <sys/un.h>
37
38#include <ctype.h>
39#include <stdarg.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <sys/uio.h>
44#include <termios.h>
45
46#include "layer.h"
47#include "mbuf.h"
48#include "log.h"
49#include "defs.h"
50#include "timer.h"
51#include "fsm.h"
52#include "descriptor.h"
53#include "lqr.h"
54#include "hdlc.h"
55#include "lcp.h"
56#include "async.h"
57#include "throughput.h"
58#include "ccp.h"
59#include "link.h"
60#include "physical.h"
61#include "iplist.h"
62#include "slcompress.h"
63#include "ncpaddr.h"
64#include "ipcp.h"
65#include "filter.h"
66#include "mp.h"
67#ifndef NORADIUS
68#include "radius.h"
69#endif
70#include "ipv6cp.h"
71#include "ncp.h"
72#include "bundle.h"
73#include "chat.h"
74#include "auth.h"
75#include "prompt.h"
76#include "proto.h"
77#include "pap.h"
78#include "chap.h"
79#include "command.h"
80#include "cbcp.h"
81#include "datalink.h"
82
83static void datalink_LoginDone(struct datalink *);
84static void datalink_NewState(struct datalink *, unsigned);
85static char *datalink_NextName(struct datalink *);
86
87static void
88datalink_OpenTimeout(void *v)
89{
90  struct datalink *dl = (struct datalink *)v;
91
92  timer_Stop(&dl->dial.timer);
93  if (dl->state == DATALINK_OPENING)
94    log_Printf(LogCHAT, "%s: Redial timer expired.\n", dl->name);
95}
96
97static int
98datalink_StartDialTimer(struct datalink *dl, int Timeout)
99{
100  int result = Timeout;
101
102  timer_Stop(&dl->dial.timer);
103  if (Timeout < 0)
104    result = (random() % DIAL_TIMEOUT) + 1;
105  dl->dial.timer.load = result ? result * SECTICKS : 1;
106  dl->dial.timer.func = datalink_OpenTimeout;
107  dl->dial.timer.name = "dial";
108  dl->dial.timer.arg = dl;
109  timer_Start(&dl->dial.timer);
110  if (dl->state == DATALINK_OPENING)
111    log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
112               dl->name, result);
113  return result;
114}
115
116static void
117datalink_HangupDone(struct datalink *dl)
118{
119  if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
120      dl->physical->fd != -1) {
121    /* Don't close our device if the link is dedicated */
122    datalink_LoginDone(dl);
123    return;
124  }
125
126  chat_Finish(&dl->chat);
127  physical_Close(dl->physical);
128  dl->phone.chosen = "N/A";
129
130  if (dl->cbcp.required) {
131    log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
132    dl->cfg.callback.opmask = 0;
133    strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
134            sizeof dl->cfg.phone.list - 1);
135    dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
136    dl->phone.alt = dl->phone.next = NULL;
137    dl->reconnect_tries = dl->cfg.reconnect.max;
138    dl->dial.tries = dl->cfg.dial.max;
139    dl->dial.incs = 0;
140    dl->script.run = 1;
141    dl->script.packetmode = 1;
142    if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
143      log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
144    bundle_LinksRemoved(dl->bundle);
145    /* if dial.timeout is < 0 (random), we don't override fsm.delay */
146    if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
147      dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
148    datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
149    cbcp_Down(&dl->cbcp);
150    datalink_NewState(dl, DATALINK_OPENING);
151    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
152        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
153      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
154  } else if (dl->bundle->CleaningUp ||
155      (dl->physical->type == PHYS_DIRECT) ||
156      ((!dl->dial.tries || (dl->dial.tries < 0 && !dl->reconnect_tries)) &&
157       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
158    datalink_NewState(dl, DATALINK_CLOSED);
159    dl->dial.tries = -1;
160    dl->dial.incs = 0;
161    dl->reconnect_tries = 0;
162    bundle_LinkClosed(dl->bundle, dl);
163    if (!dl->bundle->CleaningUp &&
164        !(dl->physical->type & (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)))
165      datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
166  } else {
167    datalink_NewState(dl, DATALINK_OPENING);
168    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
169        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
170      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
171    if (dl->dial.tries < 0) {
172      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
173      dl->dial.tries = dl->cfg.dial.max;
174      dl->dial.incs = 0;
175      dl->reconnect_tries--;
176      log_Printf(LogCHAT, "%s: Reconnect try %d of %d\n",
177                 dl->name, dl->cfg.reconnect.max - dl->reconnect_tries,
178                 dl->cfg.reconnect.max);
179      bundle_Notify(dl->bundle, EX_RECONNECT);
180    } else {
181      if (dl->phone.next == NULL)
182        datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
183      else
184        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
185      bundle_Notify(dl->bundle, EX_REDIAL);
186    }
187  }
188}
189
190const char *
191datalink_ChoosePhoneNumber(struct datalink *dl)
192{
193  char *phone;
194
195  if (dl->phone.alt == NULL) {
196    if (dl->phone.next == NULL) {
197      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
198      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
199      if (*dl->phone.list == '\0')
200        return "";
201      dl->phone.next = dl->phone.list;
202    }
203    dl->phone.alt = strsep(&dl->phone.next, ":");
204  }
205  phone = strsep(&dl->phone.alt, "|");
206  dl->phone.chosen = *phone ? phone : "[NONE]";
207  if (*phone)
208    log_Printf(LogCHAT, "Phone: %s\n", phone);
209  return phone;
210}
211
212static void
213datalink_LoginDone(struct datalink *dl)
214{
215  chat_Finish(&dl->chat);
216
217  if (!dl->script.packetmode) {
218    dl->dial.tries = -1;
219    dl->dial.incs = 0;
220    datalink_NewState(dl, DATALINK_READY);
221  } else if (!physical_Raw(dl->physical)) {
222    dl->dial.tries = 0;
223    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
224    if (dl->script.run) {
225      datalink_NewState(dl, DATALINK_LOGOUT);
226      if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
227        log_Printf(LogWARN, "Invalid logout script\n");
228    } else {
229      physical_StopDeviceTimer(dl->physical);
230      if (dl->physical->type == PHYS_DEDICATED)
231        /* force a redial timeout */
232        physical_Close(dl->physical);
233      datalink_HangupDone(dl);
234    }
235  } else {
236    dl->dial.tries = -1;
237    dl->dial.incs = 0;
238
239    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
240    async_Setup(&dl->physical->async);
241
242    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
243              0 : dl->physical->link.lcp.cfg.openmode);
244    ccp_Setup(&dl->physical->link.ccp);
245
246    datalink_NewState(dl, DATALINK_LCP);
247    fsm_Up(&dl->physical->link.lcp.fsm);
248    fsm_Open(&dl->physical->link.lcp.fsm);
249  }
250}
251
252static int
253datalink_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
254                   int *n)
255{
256  struct datalink *dl = descriptor2datalink(d);
257  int result;
258
259  result = 0;
260  switch (dl->state) {
261    case DATALINK_CLOSED:
262      if ((dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|
263                                 PHYS_FOREGROUND|PHYS_DDIAL)) &&
264          !dl->bundle->CleaningUp)
265        /*
266         * Our first time in - DEDICATED & DDIAL never come down, and
267         * DIRECT, FOREGROUND & BACKGROUND get deleted when they enter
268         * DATALINK_CLOSED.  Go to DATALINK_OPENING via datalink_Up()
269         * and fall through.
270         */
271        datalink_Up(dl, 1, 1);
272      else
273        break;
274      /* FALLTHROUGH */
275
276    case DATALINK_OPENING:
277      if (dl->dial.timer.state != TIMER_RUNNING) {
278        if (--dl->dial.tries < 0)
279          dl->dial.tries = 0;
280        if (physical_Open(dl->physical) >= 0) {
281          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
282                           "Type `~?' for help\r\n", dl->name,
283                           dl->physical->name.full);
284          if (dl->script.run) {
285            datalink_NewState(dl, DATALINK_DIAL);
286            if (!chat_Setup(&dl->chat, dl->cfg.script.dial,
287                            *dl->cfg.script.dial ?
288                            datalink_ChoosePhoneNumber(dl) : ""))
289              log_Printf(LogWARN, "Invalid dial script\n");
290            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
291                dl->cfg.dial.max)
292              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
293                        dl->name, dl->cfg.dial.max - dl->dial.tries,
294                        dl->cfg.dial.max);
295          } else
296            datalink_NewState(dl, DATALINK_CARRIER);
297          return datalink_UpdateSet(d, r, w, e, n);
298        } else {
299          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
300              dl->cfg.dial.max)
301            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
302                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
303          else
304            log_Printf(LogCHAT, "Failed to open device\n");
305
306          if (dl->bundle->CleaningUp ||
307              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
308               dl->cfg.dial.max && dl->dial.tries == 0)) {
309            datalink_NewState(dl, DATALINK_CLOSED);
310            dl->reconnect_tries = 0;
311            dl->dial.tries = -1;
312            log_WritePrompts(dl, "Failed to open %s\n",
313                             dl->physical->name.full);
314            bundle_LinkClosed(dl->bundle, dl);
315          }
316          if (!dl->bundle->CleaningUp) {
317            int timeout;
318
319            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
320            bundle_Notify(dl->bundle, EX_REDIAL);
321            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
322                             dl->physical->name.full, timeout);
323          }
324        }
325      }
326      break;
327
328    case DATALINK_CARRIER:
329      /* Wait for carrier on the device */
330      switch (physical_AwaitCarrier(dl->physical)) {
331        case CARRIER_PENDING:
332          log_Printf(LogDEBUG, "Waiting for carrier\n");
333          return 0;	/* A device timer is running to wake us up again */
334
335        case CARRIER_OK:
336          if (dl->script.run) {
337            datalink_NewState(dl, DATALINK_LOGIN);
338            if (!chat_Setup(&dl->chat, dl->cfg.script.login, NULL))
339              log_Printf(LogWARN, "Invalid login script\n");
340          } else
341            datalink_LoginDone(dl);
342          return datalink_UpdateSet(d, r, w, e, n);
343
344        case CARRIER_LOST:
345          physical_Offline(dl->physical);	/* Is this required ? */
346          if (dl->script.run) {
347            datalink_NewState(dl, DATALINK_HANGUP);
348            if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
349              log_Printf(LogWARN, "Invalid hangup script\n");
350            return datalink_UpdateSet(d, r, w, e, n);
351          } else {
352            datalink_HangupDone(dl);
353            return 0;	/* Maybe bundle_CleanDatalinks() has something to do */
354          }
355      }
356
357    case DATALINK_HANGUP:
358    case DATALINK_DIAL:
359    case DATALINK_LOGOUT:
360    case DATALINK_LOGIN:
361      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
362      switch (dl->chat.state) {
363        case CHAT_DONE:
364          /* script succeeded */
365          switch(dl->state) {
366            case DATALINK_HANGUP:
367              datalink_HangupDone(dl);
368              break;
369            case DATALINK_DIAL:
370              datalink_NewState(dl, DATALINK_CARRIER);
371              return datalink_UpdateSet(d, r, w, e, n);
372            case DATALINK_LOGOUT:
373              datalink_NewState(dl, DATALINK_HANGUP);
374              physical_Offline(dl->physical);
375              if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
376                log_Printf(LogWARN, "Invalid hangup script\n");
377              return datalink_UpdateSet(d, r, w, e, n);
378            case DATALINK_LOGIN:
379              dl->phone.alt = NULL;
380              datalink_LoginDone(dl);
381              return datalink_UpdateSet(d, r, w, e, n);
382          }
383          break;
384        case CHAT_FAILED:
385          /* Going down - script failed */
386          log_Printf(LogWARN, "Chat script failed\n");
387          switch(dl->state) {
388            case DATALINK_HANGUP:
389              datalink_HangupDone(dl);
390              break;
391            case DATALINK_DIAL:
392            case DATALINK_LOGOUT:
393            case DATALINK_LOGIN:
394              datalink_NewState(dl, DATALINK_HANGUP);
395              physical_Offline(dl->physical);
396              if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
397                log_Printf(LogWARN, "Invalid hangup script\n");
398              return datalink_UpdateSet(d, r, w, e, n);
399          }
400          break;
401      }
402      break;
403
404    case DATALINK_READY:
405    case DATALINK_LCP:
406    case DATALINK_AUTH:
407    case DATALINK_CBCP:
408    case DATALINK_OPEN:
409      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
410               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
411      break;
412  }
413  return result;
414}
415
416int
417datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
418{
419  return physical_RemoveFromSet(dl->physical, r, w, e);
420}
421
422static int
423datalink_IsSet(struct fdescriptor *d, const fd_set *fdset)
424{
425  struct datalink *dl = descriptor2datalink(d);
426
427  switch (dl->state) {
428    case DATALINK_CLOSED:
429    case DATALINK_OPENING:
430      break;
431
432    case DATALINK_HANGUP:
433    case DATALINK_DIAL:
434    case DATALINK_LOGOUT:
435    case DATALINK_LOGIN:
436      return descriptor_IsSet(&dl->chat.desc, fdset);
437
438    case DATALINK_READY:
439    case DATALINK_LCP:
440    case DATALINK_AUTH:
441    case DATALINK_CBCP:
442    case DATALINK_OPEN:
443      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
444             descriptor_IsSet(&dl->physical->desc, fdset);
445  }
446  return 0;
447}
448
449static void
450datalink_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
451{
452  struct datalink *dl = descriptor2datalink(d);
453
454  switch (dl->state) {
455    case DATALINK_CLOSED:
456    case DATALINK_OPENING:
457      break;
458
459    case DATALINK_HANGUP:
460    case DATALINK_DIAL:
461    case DATALINK_LOGOUT:
462    case DATALINK_LOGIN:
463      descriptor_Read(&dl->chat.desc, bundle, fdset);
464      break;
465
466    case DATALINK_READY:
467    case DATALINK_LCP:
468    case DATALINK_AUTH:
469    case DATALINK_CBCP:
470    case DATALINK_OPEN:
471      if (descriptor_IsSet(&dl->chap.desc, fdset))
472        descriptor_Read(&dl->chap.desc, bundle, fdset);
473      if (descriptor_IsSet(&dl->physical->desc, fdset))
474        descriptor_Read(&dl->physical->desc, bundle, fdset);
475      break;
476  }
477}
478
479static int
480datalink_Write(struct fdescriptor *d, struct bundle *bundle,
481               const fd_set *fdset)
482{
483  struct datalink *dl = descriptor2datalink(d);
484  int result = 0;
485
486  switch (dl->state) {
487    case DATALINK_CLOSED:
488    case DATALINK_OPENING:
489      break;
490
491    case DATALINK_HANGUP:
492    case DATALINK_DIAL:
493    case DATALINK_LOGOUT:
494    case DATALINK_LOGIN:
495      if ((result = descriptor_Write(&dl->chat.desc, bundle, fdset)) == -1) {
496        datalink_ComeDown(dl, CLOSE_NORMAL);
497        result = 0;
498      }
499      break;
500
501    case DATALINK_READY:
502    case DATALINK_LCP:
503    case DATALINK_AUTH:
504    case DATALINK_CBCP:
505    case DATALINK_OPEN:
506      if (descriptor_IsSet(&dl->chap.desc, fdset))
507        switch (descriptor_Write(&dl->chap.desc, bundle, fdset)) {
508        case -1:
509          datalink_ComeDown(dl, CLOSE_NORMAL);
510          break;
511        case 1:
512          result++;
513        }
514      if (descriptor_IsSet(&dl->physical->desc, fdset))
515        switch (descriptor_Write(&dl->physical->desc, bundle, fdset)) {
516        case -1:
517          datalink_ComeDown(dl, CLOSE_NORMAL);
518          break;
519        case 1:
520          result++;
521        }
522      break;
523  }
524
525  return result;
526}
527
528void
529datalink_ComeDown(struct datalink *dl, int how)
530{
531  int stayonline;
532
533  if (how == CLOSE_LCP)
534    datalink_DontHangup(dl);
535  else if (how == CLOSE_STAYDOWN)
536    datalink_StayDown(dl);
537
538  stayonline = dl->stayonline;
539  dl->stayonline = 0;
540
541  if (dl->state >= DATALINK_READY && stayonline) {
542    physical_StopDeviceTimer(dl->physical);
543    datalink_NewState(dl, DATALINK_READY);
544  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
545    physical_Offline(dl->physical);
546    if (dl->script.run && dl->state != DATALINK_OPENING) {
547      if (dl->state == DATALINK_LOGOUT) {
548        datalink_NewState(dl, DATALINK_HANGUP);
549        if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
550          log_Printf(LogWARN, "Invalid hangup script\n");
551      } else {
552        datalink_NewState(dl, DATALINK_LOGOUT);
553        if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
554          log_Printf(LogWARN, "Invalid logout script\n");
555      }
556    } else
557      datalink_HangupDone(dl);
558  }
559}
560
561static void
562datalink_LayerStart(void *v, struct fsm *fp)
563{
564  /* The given FSM is about to start up ! */
565  struct datalink *dl = (struct datalink *)v;
566
567  if (fp->proto == PROTO_LCP)
568    (*dl->parent->LayerStart)(dl->parent->object, fp);
569}
570
571static void
572datalink_LayerUp(void *v, struct fsm *fp)
573{
574  /* The given fsm is now up */
575  struct datalink *dl = (struct datalink *)v;
576  struct lcp *lcp = &dl->physical->link.lcp;
577
578  if (fp->proto == PROTO_LCP) {
579    datalink_GotAuthname(dl, "");
580    lcp->auth_ineed = lcp->want_auth;
581    lcp->auth_iwait = lcp->his_auth;
582    if (lcp->his_auth || lcp->want_auth) {
583      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
584        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
585      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
586                Auth2Nam(lcp->his_auth, lcp->his_authtype),
587                Auth2Nam(lcp->want_auth, lcp->want_authtype));
588      if (lcp->his_auth == PROTO_PAP)
589        auth_StartReq(&dl->pap);
590      if (lcp->want_auth == PROTO_CHAP)
591        auth_StartReq(&dl->chap.auth);
592    } else
593      datalink_AuthOk(dl);
594  } else if (fp->proto == PROTO_CCP)
595    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.ccp.fsm);
596}
597
598static void
599datalink_AuthReInit(struct datalink *dl)
600{
601  auth_StopTimer(&dl->pap);
602  auth_StopTimer(&dl->chap.auth);
603  chap_ReInit(&dl->chap);
604}
605
606void
607datalink_GotAuthname(struct datalink *dl, const char *name)
608{
609  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
610  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
611}
612
613void
614datalink_NCPUp(struct datalink *dl)
615{
616  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
617
618  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
619    /* we've authenticated in multilink mode ! */
620    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
621      case MP_LINKSENT:
622        /* We've handed the link off to another ppp (well, we will soon) ! */
623        return;
624      case MP_UP:
625        /* First link in the bundle */
626        auth_Select(dl->bundle, dl->peer.authname);
627        bundle_CalculateBandwidth(dl->bundle);
628        /* FALLTHROUGH */
629      case MP_ADDED:
630        /* We're in multilink mode ! */
631        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
632        bundle_CalculateBandwidth(dl->bundle);
633        break;
634      case MP_FAILED:
635        datalink_AuthNotOk(dl);
636        return;
637    }
638  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
639    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
640    datalink_NewState(dl, DATALINK_OPEN);
641    bundle_CalculateBandwidth(dl->bundle);
642    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
643    return;
644  } else {
645    dl->bundle->ncp.mp.peer = dl->peer;
646    ncp_SetLink(&dl->bundle->ncp, &dl->physical->link);
647    auth_Select(dl->bundle, dl->peer.authname);
648  }
649
650  if (ccpok) {
651    fsm_Up(&dl->physical->link.ccp.fsm);
652    fsm_Open(&dl->physical->link.ccp.fsm);
653  }
654  datalink_NewState(dl, DATALINK_OPEN);
655  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
656  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
657}
658
659void
660datalink_CBCPComplete(struct datalink *dl)
661{
662  datalink_NewState(dl, DATALINK_LCP);
663  datalink_AuthReInit(dl);
664  fsm_Close(&dl->physical->link.lcp.fsm);
665}
666
667void
668datalink_CBCPFailed(struct datalink *dl)
669{
670  cbcp_Down(&dl->cbcp);
671  datalink_CBCPComplete(dl);
672}
673
674void
675datalink_AuthOk(struct datalink *dl)
676{
677  if ((dl->physical->link.lcp.his_callback.opmask &
678       CALLBACK_BIT(CALLBACK_CBCP) ||
679       dl->physical->link.lcp.want_callback.opmask &
680       CALLBACK_BIT(CALLBACK_CBCP)) &&
681      !(dl->physical->link.lcp.want_callback.opmask &
682        CALLBACK_BIT(CALLBACK_AUTH))) {
683    /* We must have agreed CBCP if AUTH isn't there any more */
684    datalink_NewState(dl, DATALINK_CBCP);
685    cbcp_Up(&dl->cbcp);
686  } else if (dl->physical->link.lcp.want_callback.opmask) {
687    /* It's not CBCP */
688    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
689    datalink_NewState(dl, DATALINK_LCP);
690    datalink_AuthReInit(dl);
691    fsm_Close(&dl->physical->link.lcp.fsm);
692  } else
693    switch (dl->physical->link.lcp.his_callback.opmask) {
694      case 0:
695        datalink_NCPUp(dl);
696        break;
697
698      case CALLBACK_BIT(CALLBACK_AUTH):
699        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
700                          sizeof dl->cbcp.fsm.phone);
701        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
702          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
703                     dl->peer.authname);
704          *dl->cbcp.fsm.phone = '\0';
705        } else {
706          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
707          if (ptr)
708            *ptr = '\0';	/* Call back on the first number */
709          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
710                     dl->cbcp.fsm.phone);
711          dl->cbcp.required = 1;
712        }
713        dl->cbcp.fsm.delay = 0;
714        datalink_NewState(dl, DATALINK_LCP);
715        datalink_AuthReInit(dl);
716        fsm_Close(&dl->physical->link.lcp.fsm);
717        break;
718
719      case CALLBACK_BIT(CALLBACK_E164):
720        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
721                sizeof dl->cbcp.fsm.phone - 1);
722        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
723        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
724                   dl->cbcp.fsm.phone);
725        dl->cbcp.required = 1;
726        dl->cbcp.fsm.delay = 0;
727        datalink_NewState(dl, DATALINK_LCP);
728        datalink_AuthReInit(dl);
729        fsm_Close(&dl->physical->link.lcp.fsm);
730        break;
731
732      default:
733        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
734                   dl->name);
735        datalink_NewState(dl, DATALINK_LCP);
736        datalink_AuthReInit(dl);
737        fsm_Close(&dl->physical->link.lcp.fsm);
738        break;
739    }
740}
741
742void
743datalink_AuthNotOk(struct datalink *dl)
744{
745  datalink_NewState(dl, DATALINK_LCP);
746  datalink_AuthReInit(dl);
747  fsm_Close(&dl->physical->link.lcp.fsm);
748}
749
750static void
751datalink_LayerDown(void *v, struct fsm *fp)
752{
753  /* The given FSM has been told to come down */
754  struct datalink *dl = (struct datalink *)v;
755
756  if (fp->proto == PROTO_LCP) {
757    switch (dl->state) {
758      case DATALINK_OPEN:
759        peerid_Init(&dl->peer);
760        fsm2initial(&dl->physical->link.ccp.fsm);
761        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
762        (*dl->parent->LayerDown)(dl->parent->object, fp);
763        /* FALLTHROUGH (just in case) */
764
765      case DATALINK_CBCP:
766        if (!dl->cbcp.required)
767          cbcp_Down(&dl->cbcp);
768        /* FALLTHROUGH (just in case) */
769
770      case DATALINK_AUTH:
771        timer_Stop(&dl->pap.authtimer);
772        timer_Stop(&dl->chap.auth.authtimer);
773    }
774    datalink_NewState(dl, DATALINK_LCP);
775    datalink_AuthReInit(dl);
776  }
777}
778
779static void
780datalink_LayerFinish(void *v, struct fsm *fp)
781{
782  /* The given fsm is now down */
783  struct datalink *dl = (struct datalink *)v;
784
785  if (fp->proto == PROTO_LCP) {
786    fsm2initial(fp);
787    (*dl->parent->LayerFinish)(dl->parent->object, fp);
788    datalink_ComeDown(dl, CLOSE_NORMAL);
789  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
790    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
791}
792
793struct datalink *
794datalink_Create(const char *name, struct bundle *bundle, int type)
795{
796  struct datalink *dl;
797
798  dl = (struct datalink *)malloc(sizeof(struct datalink));
799  if (dl == NULL)
800    return dl;
801
802  dl->desc.type = DATALINK_DESCRIPTOR;
803  dl->desc.UpdateSet = datalink_UpdateSet;
804  dl->desc.IsSet = datalink_IsSet;
805  dl->desc.Read = datalink_Read;
806  dl->desc.Write = datalink_Write;
807
808  dl->state = DATALINK_CLOSED;
809
810  *dl->cfg.script.dial = '\0';
811  *dl->cfg.script.login = '\0';
812  *dl->cfg.script.logout = '\0';
813  *dl->cfg.script.hangup = '\0';
814  *dl->cfg.phone.list = '\0';
815  *dl->phone.list = '\0';
816  dl->phone.next = NULL;
817  dl->phone.alt = NULL;
818  dl->phone.chosen = "N/A";
819  dl->stayonline = 0;
820  dl->script.run = 1;
821  dl->script.packetmode = 1;
822  mp_linkInit(&dl->mp);
823
824  dl->bundle = bundle;
825  dl->next = NULL;
826
827  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
828
829  dl->dial.tries = 0;
830  dl->cfg.dial.max = 1;
831  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
832  dl->cfg.dial.timeout = DIAL_TIMEOUT;
833  dl->cfg.dial.inc = 0;
834  dl->cfg.dial.maxinc = 10;
835
836  dl->reconnect_tries = 0;
837  dl->cfg.reconnect.max = 0;
838  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
839
840  dl->cfg.callback.opmask = 0;
841  dl->cfg.cbcp.delay = 0;
842  *dl->cfg.cbcp.phone = '\0';
843  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
844
845  dl->name = strdup(name);
846  peerid_Init(&dl->peer);
847  dl->parent = &bundle->fsm;
848  dl->fsmp.LayerStart = datalink_LayerStart;
849  dl->fsmp.LayerUp = datalink_LayerUp;
850  dl->fsmp.LayerDown = datalink_LayerDown;
851  dl->fsmp.LayerFinish = datalink_LayerFinish;
852  dl->fsmp.object = dl;
853
854  if ((dl->physical = physical_Create(dl, type)) == NULL) {
855    free(dl->name);
856    free(dl);
857    return NULL;
858  }
859
860  pap_Init(&dl->pap, dl->physical);
861  chap_Init(&dl->chap, dl->physical);
862  cbcp_Init(&dl->cbcp, dl->physical);
863
864  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
865  chat_Init(&dl->chat, dl->physical);
866
867  log_Printf(LogPHASE, "%s: Created in %s state\n",
868             dl->name, datalink_State(dl));
869
870  return dl;
871}
872
873struct datalink *
874datalink_Clone(struct datalink *odl, const char *name)
875{
876  struct datalink *dl;
877
878  dl = (struct datalink *)malloc(sizeof(struct datalink));
879  if (dl == NULL)
880    return dl;
881
882  dl->desc.type = DATALINK_DESCRIPTOR;
883  dl->desc.UpdateSet = datalink_UpdateSet;
884  dl->desc.IsSet = datalink_IsSet;
885  dl->desc.Read = datalink_Read;
886  dl->desc.Write = datalink_Write;
887
888  dl->state = DATALINK_CLOSED;
889
890  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
891  mp_linkInit(&dl->mp);
892  *dl->phone.list = '\0';
893  dl->phone.next = NULL;
894  dl->phone.alt = NULL;
895  dl->phone.chosen = "N/A";
896  dl->bundle = odl->bundle;
897  dl->next = NULL;
898  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
899  dl->dial.tries = 0;
900  dl->reconnect_tries = 0;
901  dl->name = strdup(name);
902  peerid_Init(&dl->peer);
903  dl->parent = odl->parent;
904  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
905  dl->fsmp.object = dl;
906
907  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
908    free(dl->name);
909    free(dl);
910    return NULL;
911  }
912  pap_Init(&dl->pap, dl->physical);
913  dl->pap.cfg = odl->pap.cfg;
914
915  chap_Init(&dl->chap, dl->physical);
916  dl->chap.auth.cfg = odl->chap.auth.cfg;
917
918  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
919  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
920         sizeof dl->physical->link.lcp.cfg);
921  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
922         sizeof dl->physical->link.ccp.cfg);
923  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
924         sizeof dl->physical->async.cfg);
925
926  cbcp_Init(&dl->cbcp, dl->physical);
927
928  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
929  chat_Init(&dl->chat, dl->physical);
930
931  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
932             dl->name, datalink_State(dl));
933
934  return dl;
935}
936
937struct datalink *
938datalink_Destroy(struct datalink *dl)
939{
940  struct datalink *result;
941
942  if (dl->state != DATALINK_CLOSED) {
943    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
944              datalink_State(dl));
945    switch (dl->state) {
946      case DATALINK_HANGUP:
947      case DATALINK_DIAL:
948      case DATALINK_LOGIN:
949        chat_Finish(&dl->chat);		/* Gotta blat the timers ! */
950        break;
951    }
952  }
953
954  chat_Destroy(&dl->chat);
955  timer_Stop(&dl->dial.timer);
956  result = dl->next;
957  physical_Destroy(dl->physical);
958  free(dl->name);
959  free(dl);
960
961  return result;
962}
963
964void
965datalink_Up(struct datalink *dl, int runscripts, int packetmode)
966{
967  if (!Enabled(dl->bundle, OPT_FORCE_SCRIPTS) &&
968      (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED)))
969    /* Ignore scripts */
970    runscripts = 0;
971
972  switch (dl->state) {
973    case DATALINK_CLOSED:
974      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
975          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
976        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
977      datalink_NewState(dl, DATALINK_OPENING);
978      dl->reconnect_tries =
979        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
980      dl->dial.tries = dl->cfg.dial.max;
981      dl->script.run = runscripts;
982      dl->script.packetmode = packetmode;
983      break;
984
985    case DATALINK_OPENING:
986      if (!dl->script.run && runscripts)
987        dl->script.run = 1;
988      /* FALLTHROUGH */
989
990    case DATALINK_DIAL:
991    case DATALINK_LOGIN:
992    case DATALINK_READY:
993      if (!dl->script.packetmode && packetmode) {
994        dl->script.packetmode = 1;
995        if (dl->state == DATALINK_READY) {
996          dl->script.run = 0;
997          datalink_NewState(dl, DATALINK_CARRIER);
998        }
999      }
1000      break;
1001  }
1002}
1003
1004void
1005datalink_Close(struct datalink *dl, int how)
1006{
1007  /* Please close */
1008  switch (dl->state) {
1009    case DATALINK_OPEN:
1010      peerid_Init(&dl->peer);
1011      fsm2initial(&dl->physical->link.ccp.fsm);
1012      /* FALLTHROUGH */
1013
1014    case DATALINK_CBCP:
1015    case DATALINK_AUTH:
1016    case DATALINK_LCP:
1017      datalink_AuthReInit(dl);
1018      if (how == CLOSE_LCP)
1019        datalink_DontHangup(dl);
1020      else if (how == CLOSE_STAYDOWN)
1021        datalink_StayDown(dl);
1022      fsm_Close(&dl->physical->link.lcp.fsm);
1023      break;
1024
1025    default:
1026      datalink_ComeDown(dl, how);
1027  }
1028}
1029
1030void
1031datalink_Down(struct datalink *dl, int how)
1032{
1033  /* Carrier is lost */
1034  switch (dl->state) {
1035    case DATALINK_OPEN:
1036      peerid_Init(&dl->peer);
1037      fsm2initial(&dl->physical->link.ccp.fsm);
1038      /* FALLTHROUGH */
1039
1040    case DATALINK_CBCP:
1041    case DATALINK_AUTH:
1042    case DATALINK_LCP:
1043      fsm2initial(&dl->physical->link.lcp.fsm);
1044      if (dl->state == DATALINK_OPENING)
1045        return;			/* we're doing a callback... */
1046      /* FALLTHROUGH */
1047
1048    default:
1049      datalink_ComeDown(dl, how);
1050  }
1051}
1052
1053void
1054datalink_StayDown(struct datalink *dl)
1055{
1056  dl->dial.tries = -1;
1057  dl->reconnect_tries = 0;
1058  dl->stayonline = 0;
1059}
1060
1061void
1062datalink_DontHangup(struct datalink *dl)
1063{
1064  dl->dial.tries = -1;
1065  dl->reconnect_tries = 0;
1066  dl->stayonline = dl->state >= DATALINK_LCP ? 1 : 0;
1067}
1068
1069int
1070datalink_Show(struct cmdargs const *arg)
1071{
1072  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1073  prompt_Printf(arg->prompt, " State:              %s\n",
1074                datalink_State(arg->cx));
1075  prompt_Printf(arg->prompt, " Peer name:          ");
1076  if (*arg->cx->peer.authname)
1077    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1078  else if (arg->cx->state == DATALINK_OPEN)
1079    prompt_Printf(arg->prompt, "None requested\n");
1080  else
1081    prompt_Printf(arg->prompt, "N/A\n");
1082  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1083                mp_Enddisc(arg->cx->peer.enddisc.class,
1084                           arg->cx->peer.enddisc.address,
1085                           arg->cx->peer.enddisc.len));
1086
1087  prompt_Printf(arg->prompt, "\nDefaults:\n");
1088  prompt_Printf(arg->prompt, " Phone List:         %s\n",
1089                arg->cx->cfg.phone.list);
1090  if (arg->cx->cfg.dial.max)
1091    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1092                  arg->cx->cfg.dial.max);
1093  else
1094    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1095  if (arg->cx->cfg.dial.next_timeout >= 0)
1096    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1097  else
1098    prompt_Printf(arg->prompt, "random/");
1099  if (arg->cx->cfg.dial.timeout >= 0)
1100    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1101  else
1102    prompt_Printf(arg->prompt, "random\n");
1103  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1104                arg->cx->cfg.reconnect.max);
1105  if (arg->cx->cfg.reconnect.timeout > 0)
1106    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1107  else
1108    prompt_Printf(arg->prompt, "random\n");
1109  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1110                PHYS_DIRECT ?  "accepted: " : "requested:");
1111  if (!arg->cx->cfg.callback.opmask)
1112    prompt_Printf(arg->prompt, "none\n");
1113  else {
1114    int comma = 0;
1115
1116    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1117      prompt_Printf(arg->prompt, "none");
1118      comma = 1;
1119    }
1120    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1121      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1122      comma = 1;
1123    }
1124    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1125      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1126      if (arg->cx->physical->type != PHYS_DIRECT)
1127        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1128      comma = 1;
1129    }
1130    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1131      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1132      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1133                    arg->cx->cfg.cbcp.delay);
1134      prompt_Printf(arg->prompt, "                     phone: ");
1135      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1136        if (arg->cx->physical->type & PHYS_DIRECT)
1137          prompt_Printf(arg->prompt, "Caller decides\n");
1138        else
1139          prompt_Printf(arg->prompt, "Dialback server decides\n");
1140      } else
1141        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1142      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1143                    arg->cx->cfg.cbcp.fsmretry);
1144    } else
1145      prompt_Printf(arg->prompt, "\n");
1146  }
1147
1148  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1149                arg->cx->cfg.script.dial);
1150  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1151                arg->cx->cfg.script.login);
1152  prompt_Printf(arg->prompt, " Logout Script:      %s\n",
1153                arg->cx->cfg.script.logout);
1154  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1155                arg->cx->cfg.script.hangup);
1156  return 0;
1157}
1158
1159int
1160datalink_SetReconnect(struct cmdargs const *arg)
1161{
1162  if (arg->argc == arg->argn+2) {
1163    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1164    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1165    return 0;
1166  }
1167  return -1;
1168}
1169
1170int
1171datalink_SetRedial(struct cmdargs const *arg)
1172{
1173  const char *sep, *osep;
1174  int timeout, inc, maxinc, tries;
1175
1176  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1177    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1178	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1179      arg->cx->cfg.dial.timeout = -1;
1180      randinit();
1181    } else {
1182      timeout = atoi(arg->argv[arg->argn]);
1183
1184      if (timeout >= 0)
1185	arg->cx->cfg.dial.timeout = timeout;
1186      else {
1187	log_Printf(LogWARN, "Invalid redial timeout\n");
1188	return -1;
1189      }
1190    }
1191
1192    sep = strchr(arg->argv[arg->argn], '+');
1193    if (sep) {
1194      inc = atoi(++sep);
1195      osep = sep;
1196      if (inc >= 0)
1197        arg->cx->cfg.dial.inc = inc;
1198      else {
1199        log_Printf(LogWARN, "Invalid timeout increment\n");
1200        return -1;
1201      }
1202      sep = strchr(sep, '-');
1203      if (sep) {
1204        maxinc = atoi(++sep);
1205        if (maxinc >= 0)
1206          arg->cx->cfg.dial.maxinc = maxinc;
1207        else {
1208          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1209          return -1;
1210        }
1211      } else {
1212        /* Default timeout increment */
1213        arg->cx->cfg.dial.maxinc = 10;
1214        sep = osep;
1215      }
1216    } else {
1217      /* Default timeout increment & max increment */
1218      arg->cx->cfg.dial.inc = 0;
1219      arg->cx->cfg.dial.maxinc = 10;
1220      sep = arg->argv[arg->argn];
1221    }
1222
1223    sep = strchr(sep, '.');
1224    if (sep) {
1225      if (strcasecmp(++sep, "random") == 0) {
1226	arg->cx->cfg.dial.next_timeout = -1;
1227	randinit();
1228      } else {
1229	timeout = atoi(sep);
1230	if (timeout >= 0)
1231	  arg->cx->cfg.dial.next_timeout = timeout;
1232	else {
1233	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1234	  return -1;
1235	}
1236      }
1237    } else
1238      /* Default next timeout */
1239      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1240
1241    if (arg->argc == arg->argn+2) {
1242      tries = atoi(arg->argv[arg->argn+1]);
1243
1244      if (tries >= 0) {
1245	arg->cx->cfg.dial.max = tries;
1246      } else {
1247	log_Printf(LogWARN, "Invalid retry value\n");
1248	return 1;
1249      }
1250    }
1251    return 0;
1252  }
1253
1254  return -1;
1255}
1256
1257static const char * const states[] = {
1258  "closed",
1259  "opening",
1260  "hangup",
1261  "dial",
1262  "carrier",
1263  "logout",
1264  "login",
1265  "ready",
1266  "lcp",
1267  "auth",
1268  "cbcp",
1269  "open"
1270};
1271
1272const char *
1273datalink_State(struct datalink *dl)
1274{
1275  if (dl->state >= sizeof states / sizeof states[0])
1276    return "unknown";
1277  return states[dl->state];
1278}
1279
1280static void
1281datalink_NewState(struct datalink *dl, unsigned state)
1282{
1283  if (state != dl->state) {
1284    if (state < sizeof states / sizeof states[0]) {
1285      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1286                 states[state]);
1287      dl->state = state;
1288    } else
1289      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1290  }
1291}
1292
1293struct datalink *
1294iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1295             int fd, int *auxfd, int *nauxfd)
1296{
1297  struct datalink *dl, *cdl;
1298  struct fsm_retry copy;
1299  char *oname, *pname;
1300
1301  dl = (struct datalink *)iov[(*niov)++].iov_base;
1302  dl->name = iov[*niov].iov_base;
1303
1304  if (dl->name[DATALINK_MAXNAME-1]) {
1305    dl->name[DATALINK_MAXNAME-1] = '\0';
1306    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1307      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1308  }
1309
1310  /* Make sure the name is unique ! */
1311  oname = NULL;
1312  do {
1313    for (cdl = bundle->links; cdl; cdl = cdl->next)
1314      if (!strcasecmp(dl->name, cdl->name)) {
1315        if ((pname = datalink_NextName(dl)) == NULL) {
1316	  for ((*niov)--; *niov < maxiov; (*niov)++)
1317	    free(iov[*niov].iov_base);
1318	  return NULL;
1319	} else if (oname)
1320          free(pname);
1321        else
1322          oname = pname;
1323        break;	/* Keep renaming 'till we have no conflicts */
1324      }
1325  } while (cdl);
1326
1327  if (oname) {
1328    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1329    free(oname);
1330  } else {
1331    dl->name = strdup(dl->name);
1332    free(iov[*niov].iov_base);
1333  }
1334  (*niov)++;
1335
1336  dl->desc.type = DATALINK_DESCRIPTOR;
1337  dl->desc.UpdateSet = datalink_UpdateSet;
1338  dl->desc.IsSet = datalink_IsSet;
1339  dl->desc.Read = datalink_Read;
1340  dl->desc.Write = datalink_Write;
1341
1342  mp_linkInit(&dl->mp);
1343  *dl->phone.list = '\0';
1344  dl->phone.next = NULL;
1345  dl->phone.alt = NULL;
1346  dl->phone.chosen = "N/A";
1347
1348  dl->bundle = bundle;
1349  dl->next = NULL;
1350  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1351  dl->dial.tries = 0;
1352  dl->reconnect_tries = 0;
1353  dl->parent = &bundle->fsm;
1354  dl->fsmp.LayerStart = datalink_LayerStart;
1355  dl->fsmp.LayerUp = datalink_LayerUp;
1356  dl->fsmp.LayerDown = datalink_LayerDown;
1357  dl->fsmp.LayerFinish = datalink_LayerFinish;
1358  dl->fsmp.object = dl;
1359
1360  dl->physical = iov2physical(dl, iov, niov, maxiov, fd, auxfd, nauxfd);
1361
1362  if (!dl->physical) {
1363    free(dl->name);
1364    free(dl);
1365    dl = NULL;
1366  } else {
1367    copy = dl->pap.cfg.fsm;
1368    pap_Init(&dl->pap, dl->physical);
1369    dl->pap.cfg.fsm = copy;
1370
1371    copy = dl->chap.auth.cfg.fsm;
1372    chap_Init(&dl->chap, dl->physical);
1373    dl->chap.auth.cfg.fsm = copy;
1374
1375    cbcp_Init(&dl->cbcp, dl->physical);
1376
1377    memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
1378    chat_Init(&dl->chat, dl->physical);
1379
1380    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1381              dl->name, datalink_State(dl));
1382  }
1383
1384  return dl;
1385}
1386
1387int
1388datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1389             int *auxfd, int *nauxfd)
1390{
1391  /* If `dl' is NULL, we're allocating before a Fromiov() */
1392  int link_fd;
1393
1394  if (dl) {
1395    timer_Stop(&dl->dial.timer);
1396    /* The following is purely for the sake of paranoia */
1397    cbcp_Down(&dl->cbcp);
1398    timer_Stop(&dl->pap.authtimer);
1399    timer_Stop(&dl->chap.auth.authtimer);
1400  }
1401
1402  if (*niov >= maxiov - 1) {
1403    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1404    if (dl) {
1405      free(dl->name);
1406      free(dl);
1407    }
1408    return -1;
1409  }
1410
1411  iov[*niov].iov_base = (void *)dl;
1412  iov[(*niov)++].iov_len = sizeof *dl;
1413  iov[*niov].iov_base = dl ? realloc(dl->name, DATALINK_MAXNAME) : NULL;
1414  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1415
1416  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, auxfd,
1417                         nauxfd);
1418
1419  if (link_fd == -1 && dl) {
1420    free(dl->name);
1421    free(dl);
1422  }
1423
1424  return link_fd;
1425}
1426
1427void
1428datalink_Rename(struct datalink *dl, const char *name)
1429{
1430  free(dl->name);
1431  dl->physical->link.name = dl->name = strdup(name);
1432}
1433
1434static char *
1435datalink_NextName(struct datalink *dl)
1436{
1437  int f, n;
1438  char *name, *oname;
1439
1440  n = strlen(dl->name);
1441  if ((name = (char *)malloc(n+3)) == NULL) {
1442    log_Printf(LogERROR, "datalink_NextName: Out of memory !\n");
1443    return NULL;
1444  }
1445  for (f = n - 1; f >= 0; f--)
1446    if (!isdigit(dl->name[f]))
1447      break;
1448  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1449  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1450  oname = dl->name;
1451  dl->name = name;
1452  /* our physical link name isn't updated (it probably isn't created yet) */
1453  return oname;
1454}
1455
1456int
1457datalink_SetMode(struct datalink *dl, int mode)
1458{
1459  if (!physical_SetMode(dl->physical, mode))
1460    return 0;
1461  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1462    dl->script.run = 0;
1463  if (dl->physical->type == PHYS_DIRECT)
1464    dl->reconnect_tries = 0;
1465  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND|PHYS_FOREGROUND) &&
1466      dl->state <= DATALINK_READY)
1467    datalink_Up(dl, 1, 1);
1468  return 1;
1469}
1470
1471int
1472datalink_GetDialTimeout(struct datalink *dl)
1473{
1474  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1475
1476  if (dl->dial.incs < dl->cfg.dial.maxinc)
1477    dl->dial.incs++;
1478
1479  return result;
1480}
1481