datalink.c revision 59084 
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 59084 2000-04-07 23:46:14Z 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(LogCHAT, "%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_Finish(&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        !(dl->physical->type & (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)))
162      datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
163  } else {
164    datalink_NewState(dl, DATALINK_OPENING);
165    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
166        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
167      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
168    if (dl->dial.tries < 0) {
169      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
170      dl->dial.tries = dl->cfg.dial.max;
171      dl->dial.incs = 0;
172      dl->reconnect_tries--;
173      log_Printf(LogCHAT, "%s: Reconnect try %d of %d\n",
174                 dl->name, dl->cfg.reconnect.max - dl->reconnect_tries,
175                 dl->cfg.reconnect.max);
176      bundle_Notify(dl->bundle, EX_RECONNECT);
177    } else {
178      if (dl->phone.next == NULL)
179        datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
180      else
181        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
182      bundle_Notify(dl->bundle, EX_REDIAL);
183    }
184  }
185}
186
187const char *
188datalink_ChoosePhoneNumber(struct datalink *dl)
189{
190  char *phone;
191
192  if (dl->phone.alt == NULL) {
193    if (dl->phone.next == NULL) {
194      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
195      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
196      if (*dl->phone.list == '\0')
197        return "";
198      dl->phone.next = dl->phone.list;
199    }
200    dl->phone.alt = strsep(&dl->phone.next, ":");
201  }
202  phone = strsep(&dl->phone.alt, "|");
203  dl->phone.chosen = *phone ? phone : "[NONE]";
204  if (*phone)
205    log_Printf(LogCHAT, "Phone: %s\n", phone);
206  return phone;
207}
208
209static void
210datalink_LoginDone(struct datalink *dl)
211{
212  chat_Finish(&dl->chat);
213
214  if (!dl->script.packetmode) {
215    dl->dial.tries = -1;
216    dl->dial.incs = 0;
217    datalink_NewState(dl, DATALINK_READY);
218  } else if (!physical_Raw(dl->physical)) {
219    dl->dial.tries = 0;
220    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
221    if (dl->script.run) {
222      datalink_NewState(dl, DATALINK_LOGOUT);
223      if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
224        log_Printf(LogWARN, "Invalid logout script\n");
225    } else {
226      physical_StopDeviceTimer(dl->physical);
227      if (dl->physical->type == PHYS_DEDICATED)
228        /* force a redial timeout */
229        physical_Close(dl->physical);
230      datalink_HangupDone(dl);
231    }
232  } else {
233    dl->dial.tries = -1;
234    dl->dial.incs = 0;
235
236    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
237    async_Init(&dl->physical->async);
238
239    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
240              0 : dl->physical->link.lcp.cfg.openmode);
241    ccp_Setup(&dl->physical->link.ccp);
242
243    datalink_NewState(dl, DATALINK_LCP);
244    fsm_Up(&dl->physical->link.lcp.fsm);
245    fsm_Open(&dl->physical->link.lcp.fsm);
246  }
247}
248
249static int
250datalink_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
251                   int *n)
252{
253  struct datalink *dl = descriptor2datalink(d);
254  int result;
255
256  result = 0;
257  switch (dl->state) {
258    case DATALINK_CLOSED:
259      if ((dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|
260                                 PHYS_FOREGROUND|PHYS_DDIAL)) &&
261          !dl->bundle->CleaningUp)
262        /*
263         * Our first time in - DEDICATED & DDIAL never come down, and
264         * DIRECT, FOREGROUND & BACKGROUND get deleted when they enter
265         * DATALINK_CLOSED.  Go to DATALINK_OPENING via datalink_Up()
266         * and fall through.
267         */
268        datalink_Up(dl, 1, 1);
269      else
270        break;
271      /* fall through */
272
273    case DATALINK_OPENING:
274      if (dl->dial.timer.state != TIMER_RUNNING) {
275        if (--dl->dial.tries < 0)
276          dl->dial.tries = 0;
277        if (physical_Open(dl->physical, dl->bundle) >= 0) {
278          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
279                           "Type `~?' for help\r\n", dl->name,
280                           dl->physical->name.full);
281          if (dl->script.run) {
282            datalink_NewState(dl, DATALINK_DIAL);
283            if (!chat_Setup(&dl->chat, dl->cfg.script.dial,
284                            *dl->cfg.script.dial ?
285                            datalink_ChoosePhoneNumber(dl) : ""))
286              log_Printf(LogWARN, "Invalid dial script\n");
287            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
288                dl->cfg.dial.max)
289              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
290                        dl->name, dl->cfg.dial.max - dl->dial.tries,
291                        dl->cfg.dial.max);
292          } else
293            datalink_NewState(dl, DATALINK_CARRIER);
294          return datalink_UpdateSet(d, r, w, e, n);
295        } else {
296          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
297              dl->cfg.dial.max)
298            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
299                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
300          else
301            log_Printf(LogCHAT, "Failed to open device\n");
302
303          if (dl->bundle->CleaningUp ||
304              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
305               dl->cfg.dial.max && dl->dial.tries == 0)) {
306            datalink_NewState(dl, DATALINK_CLOSED);
307            dl->reconnect_tries = 0;
308            dl->dial.tries = -1;
309            log_WritePrompts(dl, "Failed to open %s\n",
310                             dl->physical->name.full);
311            bundle_LinkClosed(dl->bundle, dl);
312          }
313          if (!dl->bundle->CleaningUp) {
314            int timeout;
315
316            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
317            bundle_Notify(dl->bundle, EX_REDIAL);
318            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
319                             dl->physical->name.full, timeout);
320          }
321        }
322      }
323      break;
324
325    case DATALINK_CARRIER:
326      /* Wait for carrier on the device */
327      switch (physical_AwaitCarrier(dl->physical)) {
328        case CARRIER_PENDING:
329          log_Printf(LogDEBUG, "Waiting for carrier\n");
330          return 0;	/* A device timer is running to wake us up again */
331
332        case CARRIER_OK:
333          if (dl->script.run) {
334            datalink_NewState(dl, DATALINK_LOGIN);
335            if (!chat_Setup(&dl->chat, dl->cfg.script.login, NULL))
336              log_Printf(LogWARN, "Invalid login script\n");
337          } else
338            datalink_LoginDone(dl);
339          return datalink_UpdateSet(d, r, w, e, n);
340
341        case CARRIER_LOST:
342          physical_Offline(dl->physical);	/* Is this required ? */
343          if (dl->script.run) {
344            datalink_NewState(dl, DATALINK_HANGUP);
345            if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
346              log_Printf(LogWARN, "Invalid hangup script\n");
347            return datalink_UpdateSet(d, r, w, e, n);
348          } else {
349            datalink_HangupDone(dl);
350            return 0;	/* Maybe bundle_CleanDatalinks() has something to do */
351          }
352      }
353
354    case DATALINK_HANGUP:
355    case DATALINK_DIAL:
356    case DATALINK_LOGOUT:
357    case DATALINK_LOGIN:
358      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
359      switch (dl->chat.state) {
360        case CHAT_DONE:
361          /* script succeeded */
362          switch(dl->state) {
363            case DATALINK_HANGUP:
364              datalink_HangupDone(dl);
365              break;
366            case DATALINK_DIAL:
367              datalink_NewState(dl, DATALINK_CARRIER);
368              return datalink_UpdateSet(d, r, w, e, n);
369            case DATALINK_LOGOUT:
370              datalink_NewState(dl, DATALINK_HANGUP);
371              physical_Offline(dl->physical);
372              if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
373                log_Printf(LogWARN, "Invalid hangup script\n");
374              return datalink_UpdateSet(d, r, w, e, n);
375            case DATALINK_LOGIN:
376              dl->phone.alt = NULL;
377              datalink_LoginDone(dl);
378              return datalink_UpdateSet(d, r, w, e, n);
379          }
380          break;
381        case CHAT_FAILED:
382          /* Going down - script failed */
383          log_Printf(LogWARN, "Chat script failed\n");
384          switch(dl->state) {
385            case DATALINK_HANGUP:
386              datalink_HangupDone(dl);
387              break;
388            case DATALINK_DIAL:
389            case DATALINK_LOGOUT:
390            case DATALINK_LOGIN:
391              datalink_NewState(dl, DATALINK_HANGUP);
392              physical_Offline(dl->physical);
393              if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
394                log_Printf(LogWARN, "Invalid hangup script\n");
395              return datalink_UpdateSet(d, r, w, e, n);
396          }
397          break;
398      }
399      break;
400
401    case DATALINK_READY:
402    case DATALINK_LCP:
403    case DATALINK_AUTH:
404    case DATALINK_CBCP:
405    case DATALINK_OPEN:
406      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
407               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
408      break;
409  }
410  return result;
411}
412
413int
414datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
415{
416  return physical_RemoveFromSet(dl->physical, r, w, e);
417}
418
419static int
420datalink_IsSet(struct fdescriptor *d, const fd_set *fdset)
421{
422  struct datalink *dl = descriptor2datalink(d);
423
424  switch (dl->state) {
425    case DATALINK_CLOSED:
426    case DATALINK_OPENING:
427      break;
428
429    case DATALINK_HANGUP:
430    case DATALINK_DIAL:
431    case DATALINK_LOGOUT:
432    case DATALINK_LOGIN:
433      return descriptor_IsSet(&dl->chat.desc, fdset);
434
435    case DATALINK_READY:
436    case DATALINK_LCP:
437    case DATALINK_AUTH:
438    case DATALINK_CBCP:
439    case DATALINK_OPEN:
440      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
441             descriptor_IsSet(&dl->physical->desc, fdset);
442  }
443  return 0;
444}
445
446static void
447datalink_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
448{
449  struct datalink *dl = descriptor2datalink(d);
450
451  switch (dl->state) {
452    case DATALINK_CLOSED:
453    case DATALINK_OPENING:
454      break;
455
456    case DATALINK_HANGUP:
457    case DATALINK_DIAL:
458    case DATALINK_LOGOUT:
459    case DATALINK_LOGIN:
460      descriptor_Read(&dl->chat.desc, bundle, fdset);
461      break;
462
463    case DATALINK_READY:
464    case DATALINK_LCP:
465    case DATALINK_AUTH:
466    case DATALINK_CBCP:
467    case DATALINK_OPEN:
468      if (descriptor_IsSet(&dl->chap.desc, fdset))
469        descriptor_Read(&dl->chap.desc, bundle, fdset);
470      if (descriptor_IsSet(&dl->physical->desc, fdset))
471        descriptor_Read(&dl->physical->desc, bundle, fdset);
472      break;
473  }
474}
475
476static int
477datalink_Write(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
478{
479  struct datalink *dl = descriptor2datalink(d);
480  int result = 0;
481
482  switch (dl->state) {
483    case DATALINK_CLOSED:
484    case DATALINK_OPENING:
485      break;
486
487    case DATALINK_HANGUP:
488    case DATALINK_DIAL:
489    case DATALINK_LOGOUT:
490    case DATALINK_LOGIN:
491      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
492      break;
493
494    case DATALINK_READY:
495    case DATALINK_LCP:
496    case DATALINK_AUTH:
497    case DATALINK_CBCP:
498    case DATALINK_OPEN:
499      if (descriptor_IsSet(&dl->chap.desc, fdset))
500        result += descriptor_Write(&dl->chap.desc, bundle, fdset);
501      if (descriptor_IsSet(&dl->physical->desc, fdset))
502        result += descriptor_Write(&dl->physical->desc, bundle, fdset);
503      break;
504  }
505
506  return result;
507}
508
509static void
510datalink_ComeDown(struct datalink *dl, int how)
511{
512  if (how != CLOSE_NORMAL) {
513    dl->dial.tries = -1;
514    dl->reconnect_tries = 0;
515    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
516      dl->stayonline = 1;
517  }
518
519  if (dl->state >= DATALINK_READY && dl->stayonline) {
520    dl->stayonline = 0;
521    physical_StopDeviceTimer(dl->physical);
522    datalink_NewState(dl, DATALINK_READY);
523  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
524    physical_Offline(dl->physical);
525    if (dl->script.run && dl->state != DATALINK_OPENING) {
526      if (dl->state == DATALINK_LOGOUT) {
527        datalink_NewState(dl, DATALINK_HANGUP);
528        if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
529          log_Printf(LogWARN, "Invalid hangup script\n");
530      } else {
531        datalink_NewState(dl, DATALINK_LOGOUT);
532        if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
533          log_Printf(LogWARN, "Invalid logout script\n");
534      }
535    } else
536      datalink_HangupDone(dl);
537  }
538}
539
540static void
541datalink_LayerStart(void *v, struct fsm *fp)
542{
543  /* The given FSM is about to start up ! */
544  struct datalink *dl = (struct datalink *)v;
545
546  if (fp->proto == PROTO_LCP)
547    (*dl->parent->LayerStart)(dl->parent->object, fp);
548}
549
550static void
551datalink_LayerUp(void *v, struct fsm *fp)
552{
553  /* The given fsm is now up */
554  struct datalink *dl = (struct datalink *)v;
555  struct lcp *lcp = &dl->physical->link.lcp;
556
557  if (fp->proto == PROTO_LCP) {
558    datalink_GotAuthname(dl, "");
559    lcp->auth_ineed = lcp->want_auth;
560    lcp->auth_iwait = lcp->his_auth;
561    if (lcp->his_auth || lcp->want_auth) {
562      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
563        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
564      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
565                Auth2Nam(lcp->his_auth, lcp->his_authtype),
566                Auth2Nam(lcp->want_auth, lcp->want_authtype));
567      if (lcp->his_auth == PROTO_PAP)
568        auth_StartReq(&dl->pap);
569      if (lcp->want_auth == PROTO_CHAP)
570        auth_StartReq(&dl->chap.auth);
571    } else
572      datalink_AuthOk(dl);
573  }
574}
575
576static void
577datalink_AuthReInit(struct datalink *dl)
578{
579  auth_StopTimer(&dl->pap);
580  auth_StopTimer(&dl->chap.auth);
581  chap_ReInit(&dl->chap);
582}
583
584void
585datalink_GotAuthname(struct datalink *dl, const char *name)
586{
587  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
588  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
589}
590
591void
592datalink_NCPUp(struct datalink *dl)
593{
594  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
595
596  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
597    /* we've authenticated in multilink mode ! */
598    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
599      case MP_LINKSENT:
600        /* We've handed the link off to another ppp (well, we will soon) ! */
601        return;
602      case MP_UP:
603        /* First link in the bundle */
604        auth_Select(dl->bundle, dl->peer.authname);
605        bundle_CalculateBandwidth(dl->bundle);
606        /* fall through */
607      case MP_ADDED:
608        /* We're in multilink mode ! */
609        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
610        bundle_CalculateBandwidth(dl->bundle);
611        break;
612      case MP_FAILED:
613        datalink_AuthNotOk(dl);
614        return;
615    }
616  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
617    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
618    datalink_NewState(dl, DATALINK_OPEN);
619    bundle_CalculateBandwidth(dl->bundle);
620    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
621    return;
622  } else {
623    dl->bundle->ncp.mp.peer = dl->peer;
624    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
625    auth_Select(dl->bundle, dl->peer.authname);
626  }
627
628  if (ccpok) {
629    fsm_Up(&dl->physical->link.ccp.fsm);
630    fsm_Open(&dl->physical->link.ccp.fsm);
631  }
632  datalink_NewState(dl, DATALINK_OPEN);
633  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
634  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
635}
636
637void
638datalink_CBCPComplete(struct datalink *dl)
639{
640  datalink_NewState(dl, DATALINK_LCP);
641  datalink_AuthReInit(dl);
642  fsm_Close(&dl->physical->link.lcp.fsm);
643}
644
645void
646datalink_CBCPFailed(struct datalink *dl)
647{
648  cbcp_Down(&dl->cbcp);
649  datalink_CBCPComplete(dl);
650}
651
652void
653datalink_AuthOk(struct datalink *dl)
654{
655  if ((dl->physical->link.lcp.his_callback.opmask &
656       CALLBACK_BIT(CALLBACK_CBCP) ||
657       dl->physical->link.lcp.want_callback.opmask &
658       CALLBACK_BIT(CALLBACK_CBCP)) &&
659      !(dl->physical->link.lcp.want_callback.opmask &
660        CALLBACK_BIT(CALLBACK_AUTH))) {
661    /* We must have agreed CBCP if AUTH isn't there any more */
662    datalink_NewState(dl, DATALINK_CBCP);
663    cbcp_Up(&dl->cbcp);
664  } else if (dl->physical->link.lcp.want_callback.opmask) {
665    /* It's not CBCP */
666    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
667    datalink_NewState(dl, DATALINK_LCP);
668    datalink_AuthReInit(dl);
669    fsm_Close(&dl->physical->link.lcp.fsm);
670  } else
671    switch (dl->physical->link.lcp.his_callback.opmask) {
672      case 0:
673        datalink_NCPUp(dl);
674        break;
675
676      case CALLBACK_BIT(CALLBACK_AUTH):
677        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
678                          sizeof dl->cbcp.fsm.phone);
679        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
680          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
681                     dl->peer.authname);
682          *dl->cbcp.fsm.phone = '\0';
683        } else {
684          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
685          if (ptr)
686            *ptr = '\0';	/* Call back on the first number */
687          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
688                     dl->cbcp.fsm.phone);
689          dl->cbcp.required = 1;
690        }
691        dl->cbcp.fsm.delay = 0;
692        datalink_NewState(dl, DATALINK_LCP);
693        datalink_AuthReInit(dl);
694        fsm_Close(&dl->physical->link.lcp.fsm);
695        break;
696
697      case CALLBACK_BIT(CALLBACK_E164):
698        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
699                sizeof dl->cbcp.fsm.phone - 1);
700        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
701        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
702                   dl->cbcp.fsm.phone);
703        dl->cbcp.required = 1;
704        dl->cbcp.fsm.delay = 0;
705        datalink_NewState(dl, DATALINK_LCP);
706        datalink_AuthReInit(dl);
707        fsm_Close(&dl->physical->link.lcp.fsm);
708        break;
709
710      default:
711        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
712                   dl->name);
713        datalink_NewState(dl, DATALINK_LCP);
714        datalink_AuthReInit(dl);
715        fsm_Close(&dl->physical->link.lcp.fsm);
716        break;
717    }
718}
719
720void
721datalink_AuthNotOk(struct datalink *dl)
722{
723  datalink_NewState(dl, DATALINK_LCP);
724  datalink_AuthReInit(dl);
725  fsm_Close(&dl->physical->link.lcp.fsm);
726}
727
728static void
729datalink_LayerDown(void *v, struct fsm *fp)
730{
731  /* The given FSM has been told to come down */
732  struct datalink *dl = (struct datalink *)v;
733
734  if (fp->proto == PROTO_LCP) {
735    switch (dl->state) {
736      case DATALINK_OPEN:
737        peerid_Init(&dl->peer);
738        fsm2initial(&dl->physical->link.ccp.fsm);
739        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
740        (*dl->parent->LayerDown)(dl->parent->object, fp);
741        /* fall through (just in case) */
742
743      case DATALINK_CBCP:
744        if (!dl->cbcp.required)
745          cbcp_Down(&dl->cbcp);
746        /* fall through (just in case) */
747
748      case DATALINK_AUTH:
749        timer_Stop(&dl->pap.authtimer);
750        timer_Stop(&dl->chap.auth.authtimer);
751    }
752    datalink_NewState(dl, DATALINK_LCP);
753    datalink_AuthReInit(dl);
754  }
755}
756
757static void
758datalink_LayerFinish(void *v, struct fsm *fp)
759{
760  /* The given fsm is now down */
761  struct datalink *dl = (struct datalink *)v;
762
763  if (fp->proto == PROTO_LCP) {
764    fsm2initial(fp);
765    (*dl->parent->LayerFinish)(dl->parent->object, fp);
766    datalink_ComeDown(dl, CLOSE_NORMAL);
767  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
768    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
769}
770
771struct datalink *
772datalink_Create(const char *name, struct bundle *bundle, int type)
773{
774  struct datalink *dl;
775
776  dl = (struct datalink *)malloc(sizeof(struct datalink));
777  if (dl == NULL)
778    return dl;
779
780  dl->desc.type = DATALINK_DESCRIPTOR;
781  dl->desc.UpdateSet = datalink_UpdateSet;
782  dl->desc.IsSet = datalink_IsSet;
783  dl->desc.Read = datalink_Read;
784  dl->desc.Write = datalink_Write;
785
786  dl->state = DATALINK_CLOSED;
787
788  *dl->cfg.script.dial = '\0';
789  *dl->cfg.script.login = '\0';
790  *dl->cfg.script.logout = '\0';
791  *dl->cfg.script.hangup = '\0';
792  *dl->cfg.phone.list = '\0';
793  *dl->phone.list = '\0';
794  dl->phone.next = NULL;
795  dl->phone.alt = NULL;
796  dl->phone.chosen = "N/A";
797  dl->stayonline = 0;
798  dl->script.run = 1;
799  dl->script.packetmode = 1;
800  mp_linkInit(&dl->mp);
801
802  dl->bundle = bundle;
803  dl->next = NULL;
804
805  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
806
807  dl->dial.tries = 0;
808  dl->cfg.dial.max = 1;
809  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
810  dl->cfg.dial.timeout = DIAL_TIMEOUT;
811  dl->cfg.dial.inc = 0;
812  dl->cfg.dial.maxinc = 10;
813
814  dl->reconnect_tries = 0;
815  dl->cfg.reconnect.max = 0;
816  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
817
818  dl->cfg.callback.opmask = 0;
819  dl->cfg.cbcp.delay = 0;
820  *dl->cfg.cbcp.phone = '\0';
821  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
822
823  dl->name = strdup(name);
824  peerid_Init(&dl->peer);
825  dl->parent = &bundle->fsm;
826  dl->fsmp.LayerStart = datalink_LayerStart;
827  dl->fsmp.LayerUp = datalink_LayerUp;
828  dl->fsmp.LayerDown = datalink_LayerDown;
829  dl->fsmp.LayerFinish = datalink_LayerFinish;
830  dl->fsmp.object = dl;
831
832  if ((dl->physical = physical_Create(dl, type)) == NULL) {
833    free(dl->name);
834    free(dl);
835    return NULL;
836  }
837
838  pap_Init(&dl->pap, dl->physical);
839  chap_Init(&dl->chap, dl->physical);
840  cbcp_Init(&dl->cbcp, dl->physical);
841
842  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
843  chat_Init(&dl->chat, dl->physical);
844
845  log_Printf(LogPHASE, "%s: Created in %s state\n",
846             dl->name, datalink_State(dl));
847
848  return dl;
849}
850
851struct datalink *
852datalink_Clone(struct datalink *odl, const char *name)
853{
854  struct datalink *dl;
855
856  dl = (struct datalink *)malloc(sizeof(struct datalink));
857  if (dl == NULL)
858    return dl;
859
860  dl->desc.type = DATALINK_DESCRIPTOR;
861  dl->desc.UpdateSet = datalink_UpdateSet;
862  dl->desc.IsSet = datalink_IsSet;
863  dl->desc.Read = datalink_Read;
864  dl->desc.Write = datalink_Write;
865
866  dl->state = DATALINK_CLOSED;
867
868  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
869  mp_linkInit(&dl->mp);
870  *dl->phone.list = '\0';
871  dl->phone.next = NULL;
872  dl->phone.alt = NULL;
873  dl->phone.chosen = "N/A";
874  dl->bundle = odl->bundle;
875  dl->next = NULL;
876  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
877  dl->dial.tries = 0;
878  dl->reconnect_tries = 0;
879  dl->name = strdup(name);
880  peerid_Init(&dl->peer);
881  dl->parent = odl->parent;
882  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
883  dl->fsmp.object = dl;
884
885  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
886    free(dl->name);
887    free(dl);
888    return NULL;
889  }
890  pap_Init(&dl->pap, dl->physical);
891  dl->pap.cfg = odl->pap.cfg;
892
893  chap_Init(&dl->chap, dl->physical);
894  dl->chap.auth.cfg = odl->chap.auth.cfg;
895
896  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
897  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
898         sizeof dl->physical->link.lcp.cfg);
899  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
900         sizeof dl->physical->link.ccp.cfg);
901  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
902         sizeof dl->physical->async.cfg);
903
904  cbcp_Init(&dl->cbcp, dl->physical);
905
906  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
907  chat_Init(&dl->chat, dl->physical);
908
909  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
910             dl->name, datalink_State(dl));
911
912  return dl;
913}
914
915struct datalink *
916datalink_Destroy(struct datalink *dl)
917{
918  struct datalink *result;
919
920  if (dl->state != DATALINK_CLOSED) {
921    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
922              datalink_State(dl));
923    switch (dl->state) {
924      case DATALINK_HANGUP:
925      case DATALINK_DIAL:
926      case DATALINK_LOGIN:
927        chat_Finish(&dl->chat);		/* Gotta blat the timers ! */
928        break;
929    }
930  }
931
932  chat_Destroy(&dl->chat);
933  timer_Stop(&dl->dial.timer);
934  result = dl->next;
935  physical_Destroy(dl->physical);
936  free(dl->name);
937  free(dl);
938
939  return result;
940}
941
942void
943datalink_Up(struct datalink *dl, int runscripts, int packetmode)
944{
945  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
946    /* Ignore scripts */
947    runscripts = 0;
948
949  switch (dl->state) {
950    case DATALINK_CLOSED:
951      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
952          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
953        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
954      datalink_NewState(dl, DATALINK_OPENING);
955      dl->reconnect_tries =
956        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
957      dl->dial.tries = dl->cfg.dial.max;
958      dl->script.run = runscripts;
959      dl->script.packetmode = packetmode;
960      break;
961
962    case DATALINK_OPENING:
963      if (!dl->script.run && runscripts)
964        dl->script.run = 1;
965      /* fall through */
966
967    case DATALINK_DIAL:
968    case DATALINK_LOGIN:
969    case DATALINK_READY:
970      if (!dl->script.packetmode && packetmode) {
971        dl->script.packetmode = 1;
972        if (dl->state == DATALINK_READY)
973          datalink_LoginDone(dl);
974      }
975      break;
976  }
977}
978
979void
980datalink_Close(struct datalink *dl, int how)
981{
982  /* Please close */
983  switch (dl->state) {
984    case DATALINK_OPEN:
985      peerid_Init(&dl->peer);
986      fsm2initial(&dl->physical->link.ccp.fsm);
987      /* fall through */
988
989    case DATALINK_CBCP:
990    case DATALINK_AUTH:
991    case DATALINK_LCP:
992      datalink_AuthReInit(dl);
993      fsm_Close(&dl->physical->link.lcp.fsm);
994      if (how != CLOSE_NORMAL) {
995        dl->dial.tries = -1;
996        dl->reconnect_tries = 0;
997        if (how == CLOSE_LCP)
998          dl->stayonline = 1;
999      }
1000      break;
1001
1002    default:
1003      datalink_ComeDown(dl, how);
1004  }
1005}
1006
1007void
1008datalink_Down(struct datalink *dl, int how)
1009{
1010  /* Carrier is lost */
1011  switch (dl->state) {
1012    case DATALINK_OPEN:
1013      peerid_Init(&dl->peer);
1014      fsm2initial(&dl->physical->link.ccp.fsm);
1015      /* fall through */
1016
1017    case DATALINK_CBCP:
1018    case DATALINK_AUTH:
1019    case DATALINK_LCP:
1020      fsm2initial(&dl->physical->link.lcp.fsm);
1021      if (dl->state == DATALINK_OPENING)
1022        return;			/* we're doing a callback... */
1023      /* fall through */
1024
1025    default:
1026      datalink_ComeDown(dl, how);
1027  }
1028}
1029
1030void
1031datalink_StayDown(struct datalink *dl)
1032{
1033  dl->reconnect_tries = 0;
1034}
1035
1036void
1037datalink_DontHangup(struct datalink *dl)
1038{
1039  if (dl->state >= DATALINK_LCP)
1040    dl->stayonline = 1;
1041}
1042
1043int
1044datalink_Show(struct cmdargs const *arg)
1045{
1046  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1047  prompt_Printf(arg->prompt, " State:              %s\n",
1048                datalink_State(arg->cx));
1049  prompt_Printf(arg->prompt, " Peer name:          ");
1050  if (*arg->cx->peer.authname)
1051    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1052  else if (arg->cx->state == DATALINK_OPEN)
1053    prompt_Printf(arg->prompt, "None requested\n");
1054  else
1055    prompt_Printf(arg->prompt, "N/A\n");
1056  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1057                mp_Enddisc(arg->cx->peer.enddisc.class,
1058                           arg->cx->peer.enddisc.address,
1059                           arg->cx->peer.enddisc.len));
1060
1061  prompt_Printf(arg->prompt, "\nDefaults:\n");
1062  prompt_Printf(arg->prompt, " Phone List:         %s\n",
1063                arg->cx->cfg.phone.list);
1064  if (arg->cx->cfg.dial.max)
1065    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1066                  arg->cx->cfg.dial.max);
1067  else
1068    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1069  if (arg->cx->cfg.dial.next_timeout >= 0)
1070    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1071  else
1072    prompt_Printf(arg->prompt, "random/");
1073  if (arg->cx->cfg.dial.timeout >= 0)
1074    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1075  else
1076    prompt_Printf(arg->prompt, "random\n");
1077  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1078                arg->cx->cfg.reconnect.max);
1079  if (arg->cx->cfg.reconnect.timeout > 0)
1080    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1081  else
1082    prompt_Printf(arg->prompt, "random\n");
1083  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1084                PHYS_DIRECT ?  "accepted: " : "requested:");
1085  if (!arg->cx->cfg.callback.opmask)
1086    prompt_Printf(arg->prompt, "none\n");
1087  else {
1088    int comma = 0;
1089
1090    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1091      prompt_Printf(arg->prompt, "none");
1092      comma = 1;
1093    }
1094    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1095      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1096      comma = 1;
1097    }
1098    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1099      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1100      if (arg->cx->physical->type != PHYS_DIRECT)
1101        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1102      comma = 1;
1103    }
1104    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1105      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1106      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1107                    arg->cx->cfg.cbcp.delay);
1108      prompt_Printf(arg->prompt, "                     phone: ");
1109      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1110        if (arg->cx->physical->type & PHYS_DIRECT)
1111          prompt_Printf(arg->prompt, "Caller decides\n");
1112        else
1113          prompt_Printf(arg->prompt, "Dialback server decides\n");
1114      } else
1115        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1116      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1117                    arg->cx->cfg.cbcp.fsmretry);
1118    } else
1119      prompt_Printf(arg->prompt, "\n");
1120  }
1121
1122  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1123                arg->cx->cfg.script.dial);
1124  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1125                arg->cx->cfg.script.login);
1126  prompt_Printf(arg->prompt, " Logout Script:      %s\n",
1127                arg->cx->cfg.script.logout);
1128  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1129                arg->cx->cfg.script.hangup);
1130  return 0;
1131}
1132
1133int
1134datalink_SetReconnect(struct cmdargs const *arg)
1135{
1136  if (arg->argc == arg->argn+2) {
1137    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1138    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1139    return 0;
1140  }
1141  return -1;
1142}
1143
1144int
1145datalink_SetRedial(struct cmdargs const *arg)
1146{
1147  const char *sep, *osep;
1148  int timeout, inc, maxinc, tries;
1149
1150  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1151    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1152	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1153      arg->cx->cfg.dial.timeout = -1;
1154      randinit();
1155    } else {
1156      timeout = atoi(arg->argv[arg->argn]);
1157
1158      if (timeout >= 0)
1159	arg->cx->cfg.dial.timeout = timeout;
1160      else {
1161	log_Printf(LogWARN, "Invalid redial timeout\n");
1162	return -1;
1163      }
1164    }
1165
1166    sep = strchr(arg->argv[arg->argn], '+');
1167    if (sep) {
1168      inc = atoi(++sep);
1169      osep = sep;
1170      if (inc >= 0)
1171        arg->cx->cfg.dial.inc = inc;
1172      else {
1173        log_Printf(LogWARN, "Invalid timeout increment\n");
1174        return -1;
1175      }
1176      sep = strchr(sep, '-');
1177      if (sep) {
1178        maxinc = atoi(++sep);
1179        if (maxinc >= 0)
1180          arg->cx->cfg.dial.maxinc = maxinc;
1181        else {
1182          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1183          return -1;
1184        }
1185      } else {
1186        /* Default timeout increment */
1187        arg->cx->cfg.dial.maxinc = 10;
1188        sep = osep;
1189      }
1190    } else {
1191      /* Default timeout increment & max increment */
1192      arg->cx->cfg.dial.inc = 0;
1193      arg->cx->cfg.dial.maxinc = 10;
1194      sep = arg->argv[arg->argn];
1195    }
1196
1197    sep = strchr(sep, '.');
1198    if (sep) {
1199      if (strcasecmp(++sep, "random") == 0) {
1200	arg->cx->cfg.dial.next_timeout = -1;
1201	randinit();
1202      } else {
1203	timeout = atoi(sep);
1204	if (timeout >= 0)
1205	  arg->cx->cfg.dial.next_timeout = timeout;
1206	else {
1207	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1208	  return -1;
1209	}
1210      }
1211    } else
1212      /* Default next timeout */
1213      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1214
1215    if (arg->argc == arg->argn+2) {
1216      tries = atoi(arg->argv[arg->argn+1]);
1217
1218      if (tries >= 0) {
1219	arg->cx->cfg.dial.max = tries;
1220      } else {
1221	log_Printf(LogWARN, "Invalid retry value\n");
1222	return 1;
1223      }
1224    }
1225    return 0;
1226  }
1227
1228  return -1;
1229}
1230
1231static const char * const states[] = {
1232  "closed",
1233  "opening",
1234  "hangup",
1235  "dial",
1236  "carrier",
1237  "logout",
1238  "login",
1239  "ready",
1240  "lcp",
1241  "auth",
1242  "cbcp",
1243  "open"
1244};
1245
1246const char *
1247datalink_State(struct datalink *dl)
1248{
1249  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1250    return "unknown";
1251  return states[dl->state];
1252}
1253
1254static void
1255datalink_NewState(struct datalink *dl, int state)
1256{
1257  if (state != dl->state) {
1258    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1259      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1260                 states[state]);
1261      dl->state = state;
1262    } else
1263      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1264  }
1265}
1266
1267struct datalink *
1268iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1269             int fd, int *auxfd, int *nauxfd)
1270{
1271  struct datalink *dl, *cdl;
1272  struct fsm_retry copy;
1273  char *oname;
1274
1275  dl = (struct datalink *)iov[(*niov)++].iov_base;
1276  dl->name = iov[*niov].iov_base;
1277
1278  if (dl->name[DATALINK_MAXNAME-1]) {
1279    dl->name[DATALINK_MAXNAME-1] = '\0';
1280    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1281      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1282  }
1283
1284  /* Make sure the name is unique ! */
1285  oname = NULL;
1286  do {
1287    for (cdl = bundle->links; cdl; cdl = cdl->next)
1288      if (!strcasecmp(dl->name, cdl->name)) {
1289        if (oname)
1290          free(datalink_NextName(dl));
1291        else
1292          oname = datalink_NextName(dl);
1293        break;	/* Keep renaming 'till we have no conflicts */
1294      }
1295  } while (cdl);
1296
1297  if (oname) {
1298    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1299    free(oname);
1300  } else {
1301    dl->name = strdup(dl->name);
1302    free(iov[*niov].iov_base);
1303  }
1304  (*niov)++;
1305
1306  dl->desc.type = DATALINK_DESCRIPTOR;
1307  dl->desc.UpdateSet = datalink_UpdateSet;
1308  dl->desc.IsSet = datalink_IsSet;
1309  dl->desc.Read = datalink_Read;
1310  dl->desc.Write = datalink_Write;
1311
1312  mp_linkInit(&dl->mp);
1313  *dl->phone.list = '\0';
1314  dl->phone.next = NULL;
1315  dl->phone.alt = NULL;
1316  dl->phone.chosen = "N/A";
1317
1318  dl->bundle = bundle;
1319  dl->next = NULL;
1320  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1321  dl->dial.tries = 0;
1322  dl->reconnect_tries = 0;
1323  dl->parent = &bundle->fsm;
1324  dl->fsmp.LayerStart = datalink_LayerStart;
1325  dl->fsmp.LayerUp = datalink_LayerUp;
1326  dl->fsmp.LayerDown = datalink_LayerDown;
1327  dl->fsmp.LayerFinish = datalink_LayerFinish;
1328  dl->fsmp.object = dl;
1329
1330  dl->physical = iov2physical(dl, iov, niov, maxiov, fd, auxfd, nauxfd);
1331
1332  if (!dl->physical) {
1333    free(dl->name);
1334    free(dl);
1335    dl = NULL;
1336  } else {
1337    copy = dl->pap.cfg.fsm;
1338    pap_Init(&dl->pap, dl->physical);
1339    dl->pap.cfg.fsm = copy;
1340
1341    copy = dl->chap.auth.cfg.fsm;
1342    chap_Init(&dl->chap, dl->physical);
1343    dl->chap.auth.cfg.fsm = copy;
1344
1345    cbcp_Init(&dl->cbcp, dl->physical);
1346
1347    memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
1348    chat_Init(&dl->chat, dl->physical);
1349
1350    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1351              dl->name, datalink_State(dl));
1352  }
1353
1354  return dl;
1355}
1356
1357int
1358datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1359             int *auxfd, int *nauxfd)
1360{
1361  /* If `dl' is NULL, we're allocating before a Fromiov() */
1362  int link_fd;
1363
1364  if (dl) {
1365    timer_Stop(&dl->dial.timer);
1366    /* The following is purely for the sake of paranoia */
1367    cbcp_Down(&dl->cbcp);
1368    timer_Stop(&dl->pap.authtimer);
1369    timer_Stop(&dl->chap.auth.authtimer);
1370  }
1371
1372  if (*niov >= maxiov - 1) {
1373    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1374    if (dl) {
1375      free(dl->name);
1376      free(dl);
1377    }
1378    return -1;
1379  }
1380
1381  iov[*niov].iov_base = (void *)dl;
1382  iov[(*niov)++].iov_len = sizeof *dl;
1383  iov[*niov].iov_base = dl ? realloc(dl->name, DATALINK_MAXNAME) : NULL;
1384  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1385
1386  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, auxfd,
1387                         nauxfd);
1388
1389  if (link_fd == -1 && dl) {
1390    free(dl->name);
1391    free(dl);
1392  }
1393
1394  return link_fd;
1395}
1396
1397void
1398datalink_Rename(struct datalink *dl, const char *name)
1399{
1400  free(dl->name);
1401  dl->physical->link.name = dl->name = strdup(name);
1402}
1403
1404char *
1405datalink_NextName(struct datalink *dl)
1406{
1407  int f, n;
1408  char *name, *oname;
1409
1410  n = strlen(dl->name);
1411  name = (char *)malloc(n+3);
1412  for (f = n - 1; f >= 0; f--)
1413    if (!isdigit(dl->name[f]))
1414      break;
1415  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1416  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1417  oname = dl->name;
1418  dl->name = name;
1419  /* our physical link name isn't updated (it probably isn't created yet) */
1420  return oname;
1421}
1422
1423int
1424datalink_SetMode(struct datalink *dl, int mode)
1425{
1426  if (!physical_SetMode(dl->physical, mode))
1427    return 0;
1428  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1429    dl->script.run = 0;
1430  if (dl->physical->type == PHYS_DIRECT)
1431    dl->reconnect_tries = 0;
1432  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND|PHYS_FOREGROUND) &&
1433      dl->state <= DATALINK_READY)
1434    datalink_Up(dl, 1, 1);
1435  return 1;
1436}
1437
1438int
1439datalink_GetDialTimeout(struct datalink *dl)
1440{
1441  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1442
1443  if (dl->dial.incs < dl->cfg.dial.maxinc)
1444    dl->dial.incs++;
1445
1446  return result;
1447}
1448