datalink.c revision 112659 
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 112659 2003-03-26 02:03:08Z brian $
27 */
28
29#include <sys/param.h>
30#include <netinet/in.h>
31#include <netinet/in_systm.h>
32#include <netinet/ip.h>
33#include <sys/socket.h>
34#include <sys/un.h>
35
36#include <ctype.h>
37#include <stdarg.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <sys/uio.h>
42#include <termios.h>
43
44#include "layer.h"
45#include "mbuf.h"
46#include "log.h"
47#include "defs.h"
48#include "timer.h"
49#include "fsm.h"
50#include "descriptor.h"
51#include "lqr.h"
52#include "hdlc.h"
53#include "lcp.h"
54#include "async.h"
55#include "throughput.h"
56#include "ccp.h"
57#include "link.h"
58#include "physical.h"
59#include "iplist.h"
60#include "slcompress.h"
61#include "ncpaddr.h"
62#include "ipcp.h"
63#include "filter.h"
64#include "mp.h"
65#ifndef NORADIUS
66#include "radius.h"
67#endif
68#include "ipv6cp.h"
69#include "ncp.h"
70#include "bundle.h"
71#include "chat.h"
72#include "auth.h"
73#include "prompt.h"
74#include "proto.h"
75#include "pap.h"
76#include "chap.h"
77#include "command.h"
78#include "cbcp.h"
79#include "datalink.h"
80
81static void datalink_LoginDone(struct datalink *);
82static void datalink_NewState(struct datalink *, int);
83
84static void
85datalink_OpenTimeout(void *v)
86{
87  struct datalink *dl = (struct datalink *)v;
88
89  timer_Stop(&dl->dial.timer);
90  if (dl->state == DATALINK_OPENING)
91    log_Printf(LogCHAT, "%s: Redial timer expired.\n", dl->name);
92}
93
94static int
95datalink_StartDialTimer(struct datalink *dl, int Timeout)
96{
97  int result = Timeout;
98
99  timer_Stop(&dl->dial.timer);
100  if (Timeout < 0)
101    result = (random() % DIAL_TIMEOUT) + 1;
102  dl->dial.timer.load = result ? result * SECTICKS : 1;
103  dl->dial.timer.func = datalink_OpenTimeout;
104  dl->dial.timer.name = "dial";
105  dl->dial.timer.arg = dl;
106  timer_Start(&dl->dial.timer);
107  if (dl->state == DATALINK_OPENING)
108    log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
109               dl->name, result);
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_Setup(&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      /* FALLTHROUGH */
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,
478               const fd_set *fdset)
479{
480  struct datalink *dl = descriptor2datalink(d);
481  int result = 0;
482
483  switch (dl->state) {
484    case DATALINK_CLOSED:
485    case DATALINK_OPENING:
486      break;
487
488    case DATALINK_HANGUP:
489    case DATALINK_DIAL:
490    case DATALINK_LOGOUT:
491    case DATALINK_LOGIN:
492      if ((result = descriptor_Write(&dl->chat.desc, bundle, fdset)) == -1) {
493        datalink_ComeDown(dl, CLOSE_NORMAL);
494        result = 0;
495      }
496      break;
497
498    case DATALINK_READY:
499    case DATALINK_LCP:
500    case DATALINK_AUTH:
501    case DATALINK_CBCP:
502    case DATALINK_OPEN:
503      if (descriptor_IsSet(&dl->chap.desc, fdset))
504        switch (descriptor_Write(&dl->chap.desc, bundle, fdset)) {
505        case -1:
506          datalink_ComeDown(dl, CLOSE_NORMAL);
507          break;
508        case 1:
509          result++;
510        }
511      if (descriptor_IsSet(&dl->physical->desc, fdset))
512        switch (descriptor_Write(&dl->physical->desc, bundle, fdset)) {
513        case -1:
514          datalink_ComeDown(dl, CLOSE_NORMAL);
515          break;
516        case 1:
517          result++;
518        }
519      break;
520  }
521
522  return result;
523}
524
525void
526datalink_ComeDown(struct datalink *dl, int how)
527{
528  int stayonline;
529
530  if (how == CLOSE_LCP)
531    datalink_DontHangup(dl);
532  else if (how == CLOSE_STAYDOWN)
533    datalink_StayDown(dl);
534
535  stayonline = dl->stayonline;
536  dl->stayonline = 0;
537
538  if (dl->state >= DATALINK_READY && stayonline) {
539    physical_StopDeviceTimer(dl->physical);
540    datalink_NewState(dl, DATALINK_READY);
541  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
542    physical_Offline(dl->physical);
543    if (dl->script.run && dl->state != DATALINK_OPENING) {
544      if (dl->state == DATALINK_LOGOUT) {
545        datalink_NewState(dl, DATALINK_HANGUP);
546        if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
547          log_Printf(LogWARN, "Invalid hangup script\n");
548      } else {
549        datalink_NewState(dl, DATALINK_LOGOUT);
550        if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
551          log_Printf(LogWARN, "Invalid logout script\n");
552      }
553    } else
554      datalink_HangupDone(dl);
555  }
556}
557
558static void
559datalink_LayerStart(void *v, struct fsm *fp)
560{
561  /* The given FSM is about to start up ! */
562  struct datalink *dl = (struct datalink *)v;
563
564  if (fp->proto == PROTO_LCP)
565    (*dl->parent->LayerStart)(dl->parent->object, fp);
566}
567
568static void
569datalink_LayerUp(void *v, struct fsm *fp)
570{
571  /* The given fsm is now up */
572  struct datalink *dl = (struct datalink *)v;
573  struct lcp *lcp = &dl->physical->link.lcp;
574
575  if (fp->proto == PROTO_LCP) {
576    datalink_GotAuthname(dl, "");
577    lcp->auth_ineed = lcp->want_auth;
578    lcp->auth_iwait = lcp->his_auth;
579    if (lcp->his_auth || lcp->want_auth) {
580      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
581        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
582      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
583                Auth2Nam(lcp->his_auth, lcp->his_authtype),
584                Auth2Nam(lcp->want_auth, lcp->want_authtype));
585      if (lcp->his_auth == PROTO_PAP)
586        auth_StartReq(&dl->pap);
587      if (lcp->want_auth == PROTO_CHAP)
588        auth_StartReq(&dl->chap.auth);
589    } else
590      datalink_AuthOk(dl);
591  } else if (fp->proto == PROTO_CCP)
592    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.ccp.fsm);
593}
594
595static void
596datalink_AuthReInit(struct datalink *dl)
597{
598  auth_StopTimer(&dl->pap);
599  auth_StopTimer(&dl->chap.auth);
600  chap_ReInit(&dl->chap);
601}
602
603void
604datalink_GotAuthname(struct datalink *dl, const char *name)
605{
606  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
607  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
608}
609
610void
611datalink_NCPUp(struct datalink *dl)
612{
613  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
614
615  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
616    /* we've authenticated in multilink mode ! */
617    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
618      case MP_LINKSENT:
619        /* We've handed the link off to another ppp (well, we will soon) ! */
620        return;
621      case MP_UP:
622        /* First link in the bundle */
623        auth_Select(dl->bundle, dl->peer.authname);
624        bundle_CalculateBandwidth(dl->bundle);
625        /* FALLTHROUGH */
626      case MP_ADDED:
627        /* We're in multilink mode ! */
628        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
629        bundle_CalculateBandwidth(dl->bundle);
630        break;
631      case MP_FAILED:
632        datalink_AuthNotOk(dl);
633        return;
634    }
635  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
636    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
637    datalink_NewState(dl, DATALINK_OPEN);
638    bundle_CalculateBandwidth(dl->bundle);
639    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
640    return;
641  } else {
642    dl->bundle->ncp.mp.peer = dl->peer;
643    ncp_SetLink(&dl->bundle->ncp, &dl->physical->link);
644    auth_Select(dl->bundle, dl->peer.authname);
645  }
646
647  if (ccpok) {
648    fsm_Up(&dl->physical->link.ccp.fsm);
649    fsm_Open(&dl->physical->link.ccp.fsm);
650  }
651  datalink_NewState(dl, DATALINK_OPEN);
652  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
653  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
654}
655
656void
657datalink_CBCPComplete(struct datalink *dl)
658{
659  datalink_NewState(dl, DATALINK_LCP);
660  datalink_AuthReInit(dl);
661  fsm_Close(&dl->physical->link.lcp.fsm);
662}
663
664void
665datalink_CBCPFailed(struct datalink *dl)
666{
667  cbcp_Down(&dl->cbcp);
668  datalink_CBCPComplete(dl);
669}
670
671void
672datalink_AuthOk(struct datalink *dl)
673{
674  if ((dl->physical->link.lcp.his_callback.opmask &
675       CALLBACK_BIT(CALLBACK_CBCP) ||
676       dl->physical->link.lcp.want_callback.opmask &
677       CALLBACK_BIT(CALLBACK_CBCP)) &&
678      !(dl->physical->link.lcp.want_callback.opmask &
679        CALLBACK_BIT(CALLBACK_AUTH))) {
680    /* We must have agreed CBCP if AUTH isn't there any more */
681    datalink_NewState(dl, DATALINK_CBCP);
682    cbcp_Up(&dl->cbcp);
683  } else if (dl->physical->link.lcp.want_callback.opmask) {
684    /* It's not CBCP */
685    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
686    datalink_NewState(dl, DATALINK_LCP);
687    datalink_AuthReInit(dl);
688    fsm_Close(&dl->physical->link.lcp.fsm);
689  } else
690    switch (dl->physical->link.lcp.his_callback.opmask) {
691      case 0:
692        datalink_NCPUp(dl);
693        break;
694
695      case CALLBACK_BIT(CALLBACK_AUTH):
696        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
697                          sizeof dl->cbcp.fsm.phone);
698        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
699          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
700                     dl->peer.authname);
701          *dl->cbcp.fsm.phone = '\0';
702        } else {
703          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
704          if (ptr)
705            *ptr = '\0';	/* Call back on the first number */
706          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
707                     dl->cbcp.fsm.phone);
708          dl->cbcp.required = 1;
709        }
710        dl->cbcp.fsm.delay = 0;
711        datalink_NewState(dl, DATALINK_LCP);
712        datalink_AuthReInit(dl);
713        fsm_Close(&dl->physical->link.lcp.fsm);
714        break;
715
716      case CALLBACK_BIT(CALLBACK_E164):
717        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
718                sizeof dl->cbcp.fsm.phone - 1);
719        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
720        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
721                   dl->cbcp.fsm.phone);
722        dl->cbcp.required = 1;
723        dl->cbcp.fsm.delay = 0;
724        datalink_NewState(dl, DATALINK_LCP);
725        datalink_AuthReInit(dl);
726        fsm_Close(&dl->physical->link.lcp.fsm);
727        break;
728
729      default:
730        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
731                   dl->name);
732        datalink_NewState(dl, DATALINK_LCP);
733        datalink_AuthReInit(dl);
734        fsm_Close(&dl->physical->link.lcp.fsm);
735        break;
736    }
737}
738
739void
740datalink_AuthNotOk(struct datalink *dl)
741{
742  datalink_NewState(dl, DATALINK_LCP);
743  datalink_AuthReInit(dl);
744  fsm_Close(&dl->physical->link.lcp.fsm);
745}
746
747static void
748datalink_LayerDown(void *v, struct fsm *fp)
749{
750  /* The given FSM has been told to come down */
751  struct datalink *dl = (struct datalink *)v;
752
753  if (fp->proto == PROTO_LCP) {
754    switch (dl->state) {
755      case DATALINK_OPEN:
756        peerid_Init(&dl->peer);
757        fsm2initial(&dl->physical->link.ccp.fsm);
758        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
759        (*dl->parent->LayerDown)(dl->parent->object, fp);
760        /* FALLTHROUGH (just in case) */
761
762      case DATALINK_CBCP:
763        if (!dl->cbcp.required)
764          cbcp_Down(&dl->cbcp);
765        /* FALLTHROUGH (just in case) */
766
767      case DATALINK_AUTH:
768        timer_Stop(&dl->pap.authtimer);
769        timer_Stop(&dl->chap.auth.authtimer);
770    }
771    datalink_NewState(dl, DATALINK_LCP);
772    datalink_AuthReInit(dl);
773  }
774}
775
776static void
777datalink_LayerFinish(void *v, struct fsm *fp)
778{
779  /* The given fsm is now down */
780  struct datalink *dl = (struct datalink *)v;
781
782  if (fp->proto == PROTO_LCP) {
783    fsm2initial(fp);
784    (*dl->parent->LayerFinish)(dl->parent->object, fp);
785    datalink_ComeDown(dl, CLOSE_NORMAL);
786  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
787    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
788}
789
790struct datalink *
791datalink_Create(const char *name, struct bundle *bundle, int type)
792{
793  struct datalink *dl;
794
795  dl = (struct datalink *)malloc(sizeof(struct datalink));
796  if (dl == NULL)
797    return dl;
798
799  dl->desc.type = DATALINK_DESCRIPTOR;
800  dl->desc.UpdateSet = datalink_UpdateSet;
801  dl->desc.IsSet = datalink_IsSet;
802  dl->desc.Read = datalink_Read;
803  dl->desc.Write = datalink_Write;
804
805  dl->state = DATALINK_CLOSED;
806
807  *dl->cfg.script.dial = '\0';
808  *dl->cfg.script.login = '\0';
809  *dl->cfg.script.logout = '\0';
810  *dl->cfg.script.hangup = '\0';
811  *dl->cfg.phone.list = '\0';
812  *dl->phone.list = '\0';
813  dl->phone.next = NULL;
814  dl->phone.alt = NULL;
815  dl->phone.chosen = "N/A";
816  dl->stayonline = 0;
817  dl->script.run = 1;
818  dl->script.packetmode = 1;
819  mp_linkInit(&dl->mp);
820
821  dl->bundle = bundle;
822  dl->next = NULL;
823
824  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
825
826  dl->dial.tries = 0;
827  dl->cfg.dial.max = 1;
828  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
829  dl->cfg.dial.timeout = DIAL_TIMEOUT;
830  dl->cfg.dial.inc = 0;
831  dl->cfg.dial.maxinc = 10;
832
833  dl->reconnect_tries = 0;
834  dl->cfg.reconnect.max = 0;
835  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
836
837  dl->cfg.callback.opmask = 0;
838  dl->cfg.cbcp.delay = 0;
839  *dl->cfg.cbcp.phone = '\0';
840  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
841
842  dl->name = strdup(name);
843  peerid_Init(&dl->peer);
844  dl->parent = &bundle->fsm;
845  dl->fsmp.LayerStart = datalink_LayerStart;
846  dl->fsmp.LayerUp = datalink_LayerUp;
847  dl->fsmp.LayerDown = datalink_LayerDown;
848  dl->fsmp.LayerFinish = datalink_LayerFinish;
849  dl->fsmp.object = dl;
850
851  if ((dl->physical = physical_Create(dl, type)) == NULL) {
852    free(dl->name);
853    free(dl);
854    return NULL;
855  }
856
857  pap_Init(&dl->pap, dl->physical);
858  chap_Init(&dl->chap, dl->physical);
859  cbcp_Init(&dl->cbcp, dl->physical);
860
861  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
862  chat_Init(&dl->chat, dl->physical);
863
864  log_Printf(LogPHASE, "%s: Created in %s state\n",
865             dl->name, datalink_State(dl));
866
867  return dl;
868}
869
870struct datalink *
871datalink_Clone(struct datalink *odl, const char *name)
872{
873  struct datalink *dl;
874
875  dl = (struct datalink *)malloc(sizeof(struct datalink));
876  if (dl == NULL)
877    return dl;
878
879  dl->desc.type = DATALINK_DESCRIPTOR;
880  dl->desc.UpdateSet = datalink_UpdateSet;
881  dl->desc.IsSet = datalink_IsSet;
882  dl->desc.Read = datalink_Read;
883  dl->desc.Write = datalink_Write;
884
885  dl->state = DATALINK_CLOSED;
886
887  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
888  mp_linkInit(&dl->mp);
889  *dl->phone.list = '\0';
890  dl->phone.next = NULL;
891  dl->phone.alt = NULL;
892  dl->phone.chosen = "N/A";
893  dl->bundle = odl->bundle;
894  dl->next = NULL;
895  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
896  dl->dial.tries = 0;
897  dl->reconnect_tries = 0;
898  dl->name = strdup(name);
899  peerid_Init(&dl->peer);
900  dl->parent = odl->parent;
901  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
902  dl->fsmp.object = dl;
903
904  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
905    free(dl->name);
906    free(dl);
907    return NULL;
908  }
909  pap_Init(&dl->pap, dl->physical);
910  dl->pap.cfg = odl->pap.cfg;
911
912  chap_Init(&dl->chap, dl->physical);
913  dl->chap.auth.cfg = odl->chap.auth.cfg;
914
915  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
916  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
917         sizeof dl->physical->link.lcp.cfg);
918  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
919         sizeof dl->physical->link.ccp.cfg);
920  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
921         sizeof dl->physical->async.cfg);
922
923  cbcp_Init(&dl->cbcp, dl->physical);
924
925  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
926  chat_Init(&dl->chat, dl->physical);
927
928  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
929             dl->name, datalink_State(dl));
930
931  return dl;
932}
933
934struct datalink *
935datalink_Destroy(struct datalink *dl)
936{
937  struct datalink *result;
938
939  if (dl->state != DATALINK_CLOSED) {
940    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
941              datalink_State(dl));
942    switch (dl->state) {
943      case DATALINK_HANGUP:
944      case DATALINK_DIAL:
945      case DATALINK_LOGIN:
946        chat_Finish(&dl->chat);		/* Gotta blat the timers ! */
947        break;
948    }
949  }
950
951  chat_Destroy(&dl->chat);
952  timer_Stop(&dl->dial.timer);
953  result = dl->next;
954  physical_Destroy(dl->physical);
955  free(dl->name);
956  free(dl);
957
958  return result;
959}
960
961void
962datalink_Up(struct datalink *dl, int runscripts, int packetmode)
963{
964  if (!Enabled(dl->bundle, OPT_FORCE_SCRIPTS) &&
965      (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED)))
966    /* Ignore scripts */
967    runscripts = 0;
968
969  switch (dl->state) {
970    case DATALINK_CLOSED:
971      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
972          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
973        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
974      datalink_NewState(dl, DATALINK_OPENING);
975      dl->reconnect_tries =
976        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
977      dl->dial.tries = dl->cfg.dial.max;
978      dl->script.run = runscripts;
979      dl->script.packetmode = packetmode;
980      break;
981
982    case DATALINK_OPENING:
983      if (!dl->script.run && runscripts)
984        dl->script.run = 1;
985      /* FALLTHROUGH */
986
987    case DATALINK_DIAL:
988    case DATALINK_LOGIN:
989    case DATALINK_READY:
990      if (!dl->script.packetmode && packetmode) {
991        dl->script.packetmode = 1;
992        if (dl->state == DATALINK_READY) {
993          dl->script.run = 0;
994          datalink_NewState(dl, DATALINK_CARRIER);
995        }
996      }
997      break;
998  }
999}
1000
1001void
1002datalink_Close(struct datalink *dl, int how)
1003{
1004  /* Please close */
1005  switch (dl->state) {
1006    case DATALINK_OPEN:
1007      peerid_Init(&dl->peer);
1008      fsm2initial(&dl->physical->link.ccp.fsm);
1009      /* FALLTHROUGH */
1010
1011    case DATALINK_CBCP:
1012    case DATALINK_AUTH:
1013    case DATALINK_LCP:
1014      datalink_AuthReInit(dl);
1015      if (how == CLOSE_LCP)
1016        datalink_DontHangup(dl);
1017      else if (how == CLOSE_STAYDOWN)
1018        datalink_StayDown(dl);
1019      fsm_Close(&dl->physical->link.lcp.fsm);
1020      break;
1021
1022    default:
1023      datalink_ComeDown(dl, how);
1024  }
1025}
1026
1027void
1028datalink_Down(struct datalink *dl, int how)
1029{
1030  /* Carrier is lost */
1031  switch (dl->state) {
1032    case DATALINK_OPEN:
1033      peerid_Init(&dl->peer);
1034      fsm2initial(&dl->physical->link.ccp.fsm);
1035      /* FALLTHROUGH */
1036
1037    case DATALINK_CBCP:
1038    case DATALINK_AUTH:
1039    case DATALINK_LCP:
1040      fsm2initial(&dl->physical->link.lcp.fsm);
1041      if (dl->state == DATALINK_OPENING)
1042        return;			/* we're doing a callback... */
1043      /* FALLTHROUGH */
1044
1045    default:
1046      datalink_ComeDown(dl, how);
1047  }
1048}
1049
1050void
1051datalink_StayDown(struct datalink *dl)
1052{
1053  dl->dial.tries = -1;
1054  dl->reconnect_tries = 0;
1055  dl->stayonline = 0;
1056}
1057
1058void
1059datalink_DontHangup(struct datalink *dl)
1060{
1061  dl->dial.tries = -1;
1062  dl->reconnect_tries = 0;
1063  dl->stayonline = dl->state >= DATALINK_LCP ? 1 : 0;
1064}
1065
1066int
1067datalink_Show(struct cmdargs const *arg)
1068{
1069  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1070  prompt_Printf(arg->prompt, " State:              %s\n",
1071                datalink_State(arg->cx));
1072  prompt_Printf(arg->prompt, " Peer name:          ");
1073  if (*arg->cx->peer.authname)
1074    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1075  else if (arg->cx->state == DATALINK_OPEN)
1076    prompt_Printf(arg->prompt, "None requested\n");
1077  else
1078    prompt_Printf(arg->prompt, "N/A\n");
1079  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1080                mp_Enddisc(arg->cx->peer.enddisc.class,
1081                           arg->cx->peer.enddisc.address,
1082                           arg->cx->peer.enddisc.len));
1083
1084  prompt_Printf(arg->prompt, "\nDefaults:\n");
1085  prompt_Printf(arg->prompt, " Phone List:         %s\n",
1086                arg->cx->cfg.phone.list);
1087  if (arg->cx->cfg.dial.max)
1088    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1089                  arg->cx->cfg.dial.max);
1090  else
1091    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1092  if (arg->cx->cfg.dial.next_timeout >= 0)
1093    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1094  else
1095    prompt_Printf(arg->prompt, "random/");
1096  if (arg->cx->cfg.dial.timeout >= 0)
1097    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1098  else
1099    prompt_Printf(arg->prompt, "random\n");
1100  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1101                arg->cx->cfg.reconnect.max);
1102  if (arg->cx->cfg.reconnect.timeout > 0)
1103    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1104  else
1105    prompt_Printf(arg->prompt, "random\n");
1106  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1107                PHYS_DIRECT ?  "accepted: " : "requested:");
1108  if (!arg->cx->cfg.callback.opmask)
1109    prompt_Printf(arg->prompt, "none\n");
1110  else {
1111    int comma = 0;
1112
1113    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1114      prompt_Printf(arg->prompt, "none");
1115      comma = 1;
1116    }
1117    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1118      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1119      comma = 1;
1120    }
1121    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1122      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1123      if (arg->cx->physical->type != PHYS_DIRECT)
1124        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1125      comma = 1;
1126    }
1127    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1128      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1129      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1130                    arg->cx->cfg.cbcp.delay);
1131      prompt_Printf(arg->prompt, "                     phone: ");
1132      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1133        if (arg->cx->physical->type & PHYS_DIRECT)
1134          prompt_Printf(arg->prompt, "Caller decides\n");
1135        else
1136          prompt_Printf(arg->prompt, "Dialback server decides\n");
1137      } else
1138        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1139      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1140                    arg->cx->cfg.cbcp.fsmretry);
1141    } else
1142      prompt_Printf(arg->prompt, "\n");
1143  }
1144
1145  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1146                arg->cx->cfg.script.dial);
1147  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1148                arg->cx->cfg.script.login);
1149  prompt_Printf(arg->prompt, " Logout Script:      %s\n",
1150                arg->cx->cfg.script.logout);
1151  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1152                arg->cx->cfg.script.hangup);
1153  return 0;
1154}
1155
1156int
1157datalink_SetReconnect(struct cmdargs const *arg)
1158{
1159  if (arg->argc == arg->argn+2) {
1160    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1161    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1162    return 0;
1163  }
1164  return -1;
1165}
1166
1167int
1168datalink_SetRedial(struct cmdargs const *arg)
1169{
1170  const char *sep, *osep;
1171  int timeout, inc, maxinc, tries;
1172
1173  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1174    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1175	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1176      arg->cx->cfg.dial.timeout = -1;
1177      randinit();
1178    } else {
1179      timeout = atoi(arg->argv[arg->argn]);
1180
1181      if (timeout >= 0)
1182	arg->cx->cfg.dial.timeout = timeout;
1183      else {
1184	log_Printf(LogWARN, "Invalid redial timeout\n");
1185	return -1;
1186      }
1187    }
1188
1189    sep = strchr(arg->argv[arg->argn], '+');
1190    if (sep) {
1191      inc = atoi(++sep);
1192      osep = sep;
1193      if (inc >= 0)
1194        arg->cx->cfg.dial.inc = inc;
1195      else {
1196        log_Printf(LogWARN, "Invalid timeout increment\n");
1197        return -1;
1198      }
1199      sep = strchr(sep, '-');
1200      if (sep) {
1201        maxinc = atoi(++sep);
1202        if (maxinc >= 0)
1203          arg->cx->cfg.dial.maxinc = maxinc;
1204        else {
1205          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1206          return -1;
1207        }
1208      } else {
1209        /* Default timeout increment */
1210        arg->cx->cfg.dial.maxinc = 10;
1211        sep = osep;
1212      }
1213    } else {
1214      /* Default timeout increment & max increment */
1215      arg->cx->cfg.dial.inc = 0;
1216      arg->cx->cfg.dial.maxinc = 10;
1217      sep = arg->argv[arg->argn];
1218    }
1219
1220    sep = strchr(sep, '.');
1221    if (sep) {
1222      if (strcasecmp(++sep, "random") == 0) {
1223	arg->cx->cfg.dial.next_timeout = -1;
1224	randinit();
1225      } else {
1226	timeout = atoi(sep);
1227	if (timeout >= 0)
1228	  arg->cx->cfg.dial.next_timeout = timeout;
1229	else {
1230	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1231	  return -1;
1232	}
1233      }
1234    } else
1235      /* Default next timeout */
1236      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1237
1238    if (arg->argc == arg->argn+2) {
1239      tries = atoi(arg->argv[arg->argn+1]);
1240
1241      if (tries >= 0) {
1242	arg->cx->cfg.dial.max = tries;
1243      } else {
1244	log_Printf(LogWARN, "Invalid retry value\n");
1245	return 1;
1246      }
1247    }
1248    return 0;
1249  }
1250
1251  return -1;
1252}
1253
1254static const char * const states[] = {
1255  "closed",
1256  "opening",
1257  "hangup",
1258  "dial",
1259  "carrier",
1260  "logout",
1261  "login",
1262  "ready",
1263  "lcp",
1264  "auth",
1265  "cbcp",
1266  "open"
1267};
1268
1269const char *
1270datalink_State(struct datalink *dl)
1271{
1272  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1273    return "unknown";
1274  return states[dl->state];
1275}
1276
1277static void
1278datalink_NewState(struct datalink *dl, int state)
1279{
1280  if (state != dl->state) {
1281    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1282      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1283                 states[state]);
1284      dl->state = state;
1285    } else
1286      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1287  }
1288}
1289
1290struct datalink *
1291iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1292             int fd, int *auxfd, int *nauxfd)
1293{
1294  struct datalink *dl, *cdl;
1295  struct fsm_retry copy;
1296  char *oname;
1297
1298  dl = (struct datalink *)iov[(*niov)++].iov_base;
1299  dl->name = iov[*niov].iov_base;
1300
1301  if (dl->name[DATALINK_MAXNAME-1]) {
1302    dl->name[DATALINK_MAXNAME-1] = '\0';
1303    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1304      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1305  }
1306
1307  /* Make sure the name is unique ! */
1308  oname = NULL;
1309  do {
1310    for (cdl = bundle->links; cdl; cdl = cdl->next)
1311      if (!strcasecmp(dl->name, cdl->name)) {
1312        if (oname)
1313          free(datalink_NextName(dl));
1314        else
1315          oname = datalink_NextName(dl);
1316        break;	/* Keep renaming 'till we have no conflicts */
1317      }
1318  } while (cdl);
1319
1320  if (oname) {
1321    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1322    free(oname);
1323  } else {
1324    dl->name = strdup(dl->name);
1325    free(iov[*niov].iov_base);
1326  }
1327  (*niov)++;
1328
1329  dl->desc.type = DATALINK_DESCRIPTOR;
1330  dl->desc.UpdateSet = datalink_UpdateSet;
1331  dl->desc.IsSet = datalink_IsSet;
1332  dl->desc.Read = datalink_Read;
1333  dl->desc.Write = datalink_Write;
1334
1335  mp_linkInit(&dl->mp);
1336  *dl->phone.list = '\0';
1337  dl->phone.next = NULL;
1338  dl->phone.alt = NULL;
1339  dl->phone.chosen = "N/A";
1340
1341  dl->bundle = bundle;
1342  dl->next = NULL;
1343  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1344  dl->dial.tries = 0;
1345  dl->reconnect_tries = 0;
1346  dl->parent = &bundle->fsm;
1347  dl->fsmp.LayerStart = datalink_LayerStart;
1348  dl->fsmp.LayerUp = datalink_LayerUp;
1349  dl->fsmp.LayerDown = datalink_LayerDown;
1350  dl->fsmp.LayerFinish = datalink_LayerFinish;
1351  dl->fsmp.object = dl;
1352
1353  dl->physical = iov2physical(dl, iov, niov, maxiov, fd, auxfd, nauxfd);
1354
1355  if (!dl->physical) {
1356    free(dl->name);
1357    free(dl);
1358    dl = NULL;
1359  } else {
1360    copy = dl->pap.cfg.fsm;
1361    pap_Init(&dl->pap, dl->physical);
1362    dl->pap.cfg.fsm = copy;
1363
1364    copy = dl->chap.auth.cfg.fsm;
1365    chap_Init(&dl->chap, dl->physical);
1366    dl->chap.auth.cfg.fsm = copy;
1367
1368    cbcp_Init(&dl->cbcp, dl->physical);
1369
1370    memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
1371    chat_Init(&dl->chat, dl->physical);
1372
1373    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1374              dl->name, datalink_State(dl));
1375  }
1376
1377  return dl;
1378}
1379
1380int
1381datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1382             int *auxfd, int *nauxfd)
1383{
1384  /* If `dl' is NULL, we're allocating before a Fromiov() */
1385  int link_fd;
1386
1387  if (dl) {
1388    timer_Stop(&dl->dial.timer);
1389    /* The following is purely for the sake of paranoia */
1390    cbcp_Down(&dl->cbcp);
1391    timer_Stop(&dl->pap.authtimer);
1392    timer_Stop(&dl->chap.auth.authtimer);
1393  }
1394
1395  if (*niov >= maxiov - 1) {
1396    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1397    if (dl) {
1398      free(dl->name);
1399      free(dl);
1400    }
1401    return -1;
1402  }
1403
1404  iov[*niov].iov_base = (void *)dl;
1405  iov[(*niov)++].iov_len = sizeof *dl;
1406  iov[*niov].iov_base = dl ? realloc(dl->name, DATALINK_MAXNAME) : NULL;
1407  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1408
1409  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, auxfd,
1410                         nauxfd);
1411
1412  if (link_fd == -1 && dl) {
1413    free(dl->name);
1414    free(dl);
1415  }
1416
1417  return link_fd;
1418}
1419
1420void
1421datalink_Rename(struct datalink *dl, const char *name)
1422{
1423  free(dl->name);
1424  dl->physical->link.name = dl->name = strdup(name);
1425}
1426
1427char *
1428datalink_NextName(struct datalink *dl)
1429{
1430  int f, n;
1431  char *name, *oname;
1432
1433  n = strlen(dl->name);
1434  name = (char *)malloc(n+3);
1435  for (f = n - 1; f >= 0; f--)
1436    if (!isdigit(dl->name[f]))
1437      break;
1438  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1439  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1440  oname = dl->name;
1441  dl->name = name;
1442  /* our physical link name isn't updated (it probably isn't created yet) */
1443  return oname;
1444}
1445
1446int
1447datalink_SetMode(struct datalink *dl, int mode)
1448{
1449  if (!physical_SetMode(dl->physical, mode))
1450    return 0;
1451  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1452    dl->script.run = 0;
1453  if (dl->physical->type == PHYS_DIRECT)
1454    dl->reconnect_tries = 0;
1455  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND|PHYS_FOREGROUND) &&
1456      dl->state <= DATALINK_READY)
1457    datalink_Up(dl, 1, 1);
1458  return 1;
1459}
1460
1461int
1462datalink_GetDialTimeout(struct datalink *dl)
1463{
1464  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1465
1466  if (dl->dial.incs < dl->cfg.dial.maxinc)
1467    dl->dial.incs++;
1468
1469  return result;
1470}
1471