datalink.c revision 52942 
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 52942 1999-11-06 22:50:59Z brian $
27 */
28
29#include <sys/param.h>
30#include <netinet/in.h>
31#include <netinet/in_systm.h>
32#include <netinet/ip.h>
33#include <sys/un.h>
34
35#include <ctype.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <sys/uio.h>
40#include <termios.h>
41
42#include "layer.h"
43#include "mbuf.h"
44#include "log.h"
45#include "defs.h"
46#include "timer.h"
47#include "fsm.h"
48#include "lcp.h"
49#include "descriptor.h"
50#include "lqr.h"
51#include "hdlc.h"
52#include "async.h"
53#include "throughput.h"
54#include "ccp.h"
55#include "link.h"
56#include "physical.h"
57#include "iplist.h"
58#include "slcompress.h"
59#include "ipcp.h"
60#include "filter.h"
61#include "mp.h"
62#ifndef NORADIUS
63#include "radius.h"
64#endif
65#include "bundle.h"
66#include "chat.h"
67#include "auth.h"
68#include "prompt.h"
69#include "proto.h"
70#include "pap.h"
71#include "chap.h"
72#include "command.h"
73#include "cbcp.h"
74#include "datalink.h"
75
76static void datalink_LoginDone(struct datalink *);
77static void datalink_NewState(struct datalink *, int);
78
79static void
80datalink_OpenTimeout(void *v)
81{
82  struct datalink *dl = (struct datalink *)v;
83
84  timer_Stop(&dl->dial.timer);
85  if (dl->state == DATALINK_OPENING)
86    log_Printf(LogPHASE, "%s: Redial timer expired.\n", dl->name);
87}
88
89static int
90datalink_StartDialTimer(struct datalink *dl, int Timeout)
91{
92  int result = Timeout;
93
94  timer_Stop(&dl->dial.timer);
95  if (Timeout) {
96    if (Timeout > 0)
97      dl->dial.timer.load = Timeout * SECTICKS;
98    else {
99      result = (random() % DIAL_TIMEOUT) + 1;
100      dl->dial.timer.load = result * SECTICKS;
101    }
102    dl->dial.timer.func = datalink_OpenTimeout;
103    dl->dial.timer.name = "dial";
104    dl->dial.timer.arg = dl;
105    timer_Start(&dl->dial.timer);
106    if (dl->state == DATALINK_OPENING)
107      log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
108                dl->name, Timeout);
109  }
110  return result;
111}
112
113static void
114datalink_HangupDone(struct datalink *dl)
115{
116  if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
117      dl->physical->fd != -1) {
118    /* Don't close our device if the link is dedicated */
119    datalink_LoginDone(dl);
120    return;
121  }
122
123  chat_Destroy(&dl->chat);
124  physical_Close(dl->physical);
125  dl->phone.chosen = "N/A";
126
127  if (dl->cbcp.required) {
128    log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
129    dl->cfg.callback.opmask = 0;
130    strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
131            sizeof dl->cfg.phone.list - 1);
132    dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
133    dl->phone.alt = dl->phone.next = NULL;
134    dl->reconnect_tries = dl->cfg.reconnect.max;
135    dl->dial.tries = dl->cfg.dial.max;
136    dl->dial.incs = 0;
137    dl->script.run = 1;
138    dl->script.packetmode = 1;
139    if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
140      log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
141    bundle_LinksRemoved(dl->bundle);
142    /* if dial.timeout is < 0 (random), we don't override fsm.delay */
143    if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
144      dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
145    datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
146    cbcp_Down(&dl->cbcp);
147    datalink_NewState(dl, DATALINK_OPENING);
148    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
149        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
150      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
151  } else if (dl->bundle->CleaningUp ||
152      (dl->physical->type == PHYS_DIRECT) ||
153      ((!dl->dial.tries || (dl->dial.tries < 0 && !dl->reconnect_tries)) &&
154       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
155    datalink_NewState(dl, DATALINK_CLOSED);
156    dl->dial.tries = -1;
157    dl->dial.incs = 0;
158    dl->reconnect_tries = 0;
159    bundle_LinkClosed(dl->bundle, dl);
160    if (!dl->bundle->CleaningUp)
161      datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
162  } else {
163    datalink_NewState(dl, DATALINK_OPENING);
164    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
165        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
166      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
167    if (dl->dial.tries < 0) {
168      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
169      dl->dial.tries = dl->cfg.dial.max;
170      dl->dial.incs = 0;
171      dl->reconnect_tries--;
172    } else {
173      if (dl->phone.next == NULL)
174        datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
175      else
176        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
177    }
178  }
179}
180
181const char *
182datalink_ChoosePhoneNumber(struct datalink *dl)
183{
184  char *phone;
185
186  if (dl->phone.alt == NULL) {
187    if (dl->phone.next == NULL) {
188      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
189      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
190      if (*dl->phone.list == '\0')
191        return "";
192      dl->phone.next = dl->phone.list;
193    }
194    dl->phone.alt = strsep(&dl->phone.next, ":");
195  }
196  phone = strsep(&dl->phone.alt, "|");
197  dl->phone.chosen = *phone ? phone : "[NONE]";
198  if (*phone)
199    log_Printf(LogPHASE, "Phone: %s\n", phone);
200  return phone;
201}
202
203static void
204datalink_LoginDone(struct datalink *dl)
205{
206  chat_Destroy(&dl->chat);
207
208  if (!dl->script.packetmode) {
209    dl->dial.tries = -1;
210    dl->dial.incs = 0;
211    datalink_NewState(dl, DATALINK_READY);
212  } else if (!physical_Raw(dl->physical)) {
213    dl->dial.tries = 0;
214    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
215    if (dl->script.run) {
216      datalink_NewState(dl, DATALINK_LOGOUT);
217      chat_Init(&dl->chat, dl->physical, dl->cfg.script.logout, NULL);
218    } else {
219      physical_StopDeviceTimer(dl->physical);
220      if (dl->physical->type == PHYS_DEDICATED)
221        /* force a redial timeout */
222        physical_Close(dl->physical);
223      datalink_HangupDone(dl);
224    }
225  } else {
226    dl->dial.tries = -1;
227    dl->dial.incs = 0;
228
229    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
230    async_Init(&dl->physical->async);
231
232    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
233              0 : dl->physical->link.lcp.cfg.openmode);
234    ccp_Setup(&dl->physical->link.ccp);
235
236    datalink_NewState(dl, DATALINK_LCP);
237    fsm_Up(&dl->physical->link.lcp.fsm);
238    fsm_Open(&dl->physical->link.lcp.fsm);
239  }
240}
241
242static int
243datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
244                   int *n)
245{
246  struct datalink *dl = descriptor2datalink(d);
247  int result;
248
249  result = 0;
250  switch (dl->state) {
251    case DATALINK_CLOSED:
252      if ((dl->physical->type &
253           (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|PHYS_DDIAL)) &&
254          !dl->bundle->CleaningUp)
255        /*
256         * Our first time in - DEDICATED & DDIAL never come down, and
257         * DIRECT & BACKGROUND get deleted when they enter DATALINK_CLOSED.
258         * Go to DATALINK_OPENING via datalink_Up() and fall through.
259         */
260        datalink_Up(dl, 1, 1);
261      else
262        break;
263      /* fall through */
264
265    case DATALINK_OPENING:
266      if (dl->dial.timer.state != TIMER_RUNNING) {
267        if (--dl->dial.tries < 0)
268          dl->dial.tries = 0;
269        if (physical_Open(dl->physical, dl->bundle) >= 0) {
270          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
271                           "Type `~?' for help\r\n", dl->name,
272                           dl->physical->name.full);
273          if (dl->script.run) {
274            datalink_NewState(dl, DATALINK_DIAL);
275            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial,
276                      *dl->cfg.script.dial ?
277                      datalink_ChoosePhoneNumber(dl) : "");
278            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
279                dl->cfg.dial.max)
280              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
281                        dl->name, dl->cfg.dial.max - dl->dial.tries,
282                        dl->cfg.dial.max);
283          } else
284            datalink_NewState(dl, DATALINK_CARRIER);
285          return datalink_UpdateSet(d, r, w, e, n);
286        } else {
287          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
288              dl->cfg.dial.max)
289            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
290                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
291          else
292            log_Printf(LogCHAT, "Failed to open device\n");
293
294          if (dl->bundle->CleaningUp ||
295              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
296               dl->cfg.dial.max && dl->dial.tries == 0)) {
297            datalink_NewState(dl, DATALINK_CLOSED);
298            dl->reconnect_tries = 0;
299            dl->dial.tries = -1;
300            log_WritePrompts(dl, "Failed to open %s\n",
301                             dl->physical->name.full);
302            bundle_LinkClosed(dl->bundle, dl);
303          }
304          if (!dl->bundle->CleaningUp) {
305            int timeout;
306
307            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
308            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
309                             dl->physical->name.full, timeout);
310          }
311        }
312      }
313      break;
314
315    case DATALINK_CARRIER:
316      /* Wait for carrier on the device */
317      switch (physical_AwaitCarrier(dl->physical)) {
318        case CARRIER_PENDING:
319          log_Printf(LogDEBUG, "Waiting for carrier\n");
320          return 0;	/* A device timer is running to wake us up again */
321
322        case CARRIER_OK:
323          if (dl->script.run) {
324            datalink_NewState(dl, DATALINK_LOGIN);
325            chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, NULL);
326          } else
327            datalink_LoginDone(dl);
328          return datalink_UpdateSet(d, r, w, e, n);
329
330        case CARRIER_LOST:
331          physical_Offline(dl->physical);	/* Is this required ? */
332          if (dl->script.run) {
333            datalink_NewState(dl, DATALINK_HANGUP);
334            chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
335          } else
336            datalink_HangupDone(dl);
337          return datalink_UpdateSet(d, r, w, e, n);
338      }
339
340    case DATALINK_HANGUP:
341    case DATALINK_DIAL:
342    case DATALINK_LOGOUT:
343    case DATALINK_LOGIN:
344      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
345      switch (dl->chat.state) {
346        case CHAT_DONE:
347          /* script succeeded */
348          switch(dl->state) {
349            case DATALINK_HANGUP:
350              datalink_HangupDone(dl);
351              break;
352            case DATALINK_DIAL:
353              datalink_NewState(dl, DATALINK_CARRIER);
354              return datalink_UpdateSet(d, r, w, e, n);
355            case DATALINK_LOGOUT:
356              datalink_NewState(dl, DATALINK_HANGUP);
357              physical_Offline(dl->physical);
358              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
359              return datalink_UpdateSet(d, r, w, e, n);
360            case DATALINK_LOGIN:
361              dl->phone.alt = NULL;
362              datalink_LoginDone(dl);
363              return datalink_UpdateSet(d, r, w, e, n);
364          }
365          break;
366        case CHAT_FAILED:
367          /* Going down - script failed */
368          log_Printf(LogWARN, "Chat script failed\n");
369          switch(dl->state) {
370            case DATALINK_HANGUP:
371              datalink_HangupDone(dl);
372              break;
373            case DATALINK_DIAL:
374            case DATALINK_LOGOUT:
375            case DATALINK_LOGIN:
376              datalink_NewState(dl, DATALINK_HANGUP);
377              physical_Offline(dl->physical);
378              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
379              return datalink_UpdateSet(d, r, w, e, n);
380          }
381          break;
382      }
383      break;
384
385    case DATALINK_READY:
386    case DATALINK_LCP:
387    case DATALINK_AUTH:
388    case DATALINK_CBCP:
389    case DATALINK_OPEN:
390      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
391               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
392      break;
393  }
394  return result;
395}
396
397int
398datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
399{
400  return physical_RemoveFromSet(dl->physical, r, w, e);
401}
402
403static int
404datalink_IsSet(struct descriptor *d, const fd_set *fdset)
405{
406  struct datalink *dl = descriptor2datalink(d);
407
408  switch (dl->state) {
409    case DATALINK_CLOSED:
410    case DATALINK_OPENING:
411      break;
412
413    case DATALINK_HANGUP:
414    case DATALINK_DIAL:
415    case DATALINK_LOGOUT:
416    case DATALINK_LOGIN:
417      return descriptor_IsSet(&dl->chat.desc, fdset);
418
419    case DATALINK_READY:
420    case DATALINK_LCP:
421    case DATALINK_AUTH:
422    case DATALINK_CBCP:
423    case DATALINK_OPEN:
424      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
425             descriptor_IsSet(&dl->physical->desc, fdset);
426  }
427  return 0;
428}
429
430static void
431datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
432{
433  struct datalink *dl = descriptor2datalink(d);
434
435  switch (dl->state) {
436    case DATALINK_CLOSED:
437    case DATALINK_OPENING:
438      break;
439
440    case DATALINK_HANGUP:
441    case DATALINK_DIAL:
442    case DATALINK_LOGOUT:
443    case DATALINK_LOGIN:
444      descriptor_Read(&dl->chat.desc, bundle, fdset);
445      break;
446
447    case DATALINK_READY:
448    case DATALINK_LCP:
449    case DATALINK_AUTH:
450    case DATALINK_CBCP:
451    case DATALINK_OPEN:
452      if (descriptor_IsSet(&dl->chap.desc, fdset))
453        descriptor_Read(&dl->chap.desc, bundle, fdset);
454      if (descriptor_IsSet(&dl->physical->desc, fdset))
455        descriptor_Read(&dl->physical->desc, bundle, fdset);
456      break;
457  }
458}
459
460static int
461datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
462{
463  struct datalink *dl = descriptor2datalink(d);
464  int result = 0;
465
466  switch (dl->state) {
467    case DATALINK_CLOSED:
468    case DATALINK_OPENING:
469      break;
470
471    case DATALINK_HANGUP:
472    case DATALINK_DIAL:
473    case DATALINK_LOGOUT:
474    case DATALINK_LOGIN:
475      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
476      break;
477
478    case DATALINK_READY:
479    case DATALINK_LCP:
480    case DATALINK_AUTH:
481    case DATALINK_CBCP:
482    case DATALINK_OPEN:
483      if (descriptor_IsSet(&dl->chap.desc, fdset))
484        result += descriptor_Write(&dl->chap.desc, bundle, fdset);
485      if (descriptor_IsSet(&dl->physical->desc, fdset))
486        result += descriptor_Write(&dl->physical->desc, bundle, fdset);
487      break;
488  }
489
490  return result;
491}
492
493static void
494datalink_ComeDown(struct datalink *dl, int how)
495{
496  if (how != CLOSE_NORMAL) {
497    dl->dial.tries = -1;
498    dl->reconnect_tries = 0;
499    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
500      dl->stayonline = 1;
501  }
502
503  if (dl->state >= DATALINK_READY && dl->stayonline) {
504    dl->stayonline = 0;
505    physical_StopDeviceTimer(dl->physical);
506    datalink_NewState(dl, DATALINK_READY);
507  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
508    physical_Offline(dl->physical);
509    if (dl->script.run && dl->state != DATALINK_OPENING) {
510      if (dl->state == DATALINK_LOGOUT) {
511        datalink_NewState(dl, DATALINK_HANGUP);
512        chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
513      } else {
514        datalink_NewState(dl, DATALINK_LOGOUT);
515        chat_Init(&dl->chat, dl->physical, dl->cfg.script.logout, NULL);
516      }
517    } else
518      datalink_HangupDone(dl);
519  }
520}
521
522static void
523datalink_LayerStart(void *v, struct fsm *fp)
524{
525  /* The given FSM is about to start up ! */
526  struct datalink *dl = (struct datalink *)v;
527
528  if (fp->proto == PROTO_LCP)
529    (*dl->parent->LayerStart)(dl->parent->object, fp);
530}
531
532static void
533datalink_LayerUp(void *v, struct fsm *fp)
534{
535  /* The given fsm is now up */
536  struct datalink *dl = (struct datalink *)v;
537  struct lcp *lcp = &dl->physical->link.lcp;
538
539  if (fp->proto == PROTO_LCP) {
540    datalink_GotAuthname(dl, "");
541    lcp->auth_ineed = lcp->want_auth;
542    lcp->auth_iwait = lcp->his_auth;
543    if (lcp->his_auth || lcp->want_auth) {
544      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
545        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
546      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
547                Auth2Nam(lcp->his_auth, lcp->his_authtype),
548                Auth2Nam(lcp->want_auth, lcp->want_authtype));
549      if (lcp->his_auth == PROTO_PAP)
550        auth_StartReq(&dl->pap);
551      if (lcp->want_auth == PROTO_CHAP)
552        auth_StartReq(&dl->chap.auth);
553    } else
554      datalink_AuthOk(dl);
555  }
556}
557
558static void
559datalink_AuthReInit(struct datalink *dl)
560{
561  auth_StopTimer(&dl->pap);
562  auth_StopTimer(&dl->chap.auth);
563  chap_ReInit(&dl->chap);
564}
565
566void
567datalink_GotAuthname(struct datalink *dl, const char *name)
568{
569  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
570  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
571}
572
573void
574datalink_NCPUp(struct datalink *dl)
575{
576  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
577
578  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
579    /* we've authenticated in multilink mode ! */
580    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
581      case MP_LINKSENT:
582        /* We've handed the link off to another ppp (well, we will soon) ! */
583        return;
584      case MP_UP:
585        /* First link in the bundle */
586        auth_Select(dl->bundle, dl->peer.authname);
587        bundle_CalculateBandwidth(dl->bundle);
588        /* fall through */
589      case MP_ADDED:
590        /* We're in multilink mode ! */
591        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
592        bundle_CalculateBandwidth(dl->bundle);
593        break;
594      case MP_FAILED:
595        datalink_AuthNotOk(dl);
596        return;
597    }
598  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
599    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
600    datalink_NewState(dl, DATALINK_OPEN);
601    bundle_CalculateBandwidth(dl->bundle);
602    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
603    return;
604  } else {
605    dl->bundle->ncp.mp.peer = dl->peer;
606    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
607    auth_Select(dl->bundle, dl->peer.authname);
608  }
609
610  if (ccpok) {
611    fsm_Up(&dl->physical->link.ccp.fsm);
612    fsm_Open(&dl->physical->link.ccp.fsm);
613  }
614  datalink_NewState(dl, DATALINK_OPEN);
615  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
616  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
617}
618
619void
620datalink_CBCPComplete(struct datalink *dl)
621{
622  datalink_NewState(dl, DATALINK_LCP);
623  datalink_AuthReInit(dl);
624  fsm_Close(&dl->physical->link.lcp.fsm);
625}
626
627void
628datalink_CBCPFailed(struct datalink *dl)
629{
630  cbcp_Down(&dl->cbcp);
631  datalink_CBCPComplete(dl);
632}
633
634void
635datalink_AuthOk(struct datalink *dl)
636{
637  if ((dl->physical->link.lcp.his_callback.opmask &
638       CALLBACK_BIT(CALLBACK_CBCP) ||
639       dl->physical->link.lcp.want_callback.opmask &
640       CALLBACK_BIT(CALLBACK_CBCP)) &&
641      !(dl->physical->link.lcp.want_callback.opmask &
642        CALLBACK_BIT(CALLBACK_AUTH))) {
643    /* We must have agreed CBCP if AUTH isn't there any more */
644    datalink_NewState(dl, DATALINK_CBCP);
645    cbcp_Up(&dl->cbcp);
646  } else if (dl->physical->link.lcp.want_callback.opmask) {
647    /* It's not CBCP */
648    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
649    datalink_NewState(dl, DATALINK_LCP);
650    datalink_AuthReInit(dl);
651    fsm_Close(&dl->physical->link.lcp.fsm);
652  } else
653    switch (dl->physical->link.lcp.his_callback.opmask) {
654      case 0:
655        datalink_NCPUp(dl);
656        break;
657
658      case CALLBACK_BIT(CALLBACK_AUTH):
659        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
660                          sizeof dl->cbcp.fsm.phone);
661        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
662          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
663                     dl->peer.authname);
664          *dl->cbcp.fsm.phone = '\0';
665        } else {
666          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
667          if (ptr)
668            *ptr = '\0';	/* Call back on the first number */
669          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
670                     dl->cbcp.fsm.phone);
671          dl->cbcp.required = 1;
672        }
673        dl->cbcp.fsm.delay = 0;
674        datalink_NewState(dl, DATALINK_LCP);
675        datalink_AuthReInit(dl);
676        fsm_Close(&dl->physical->link.lcp.fsm);
677        break;
678
679      case CALLBACK_BIT(CALLBACK_E164):
680        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
681                sizeof dl->cbcp.fsm.phone - 1);
682        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
683        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
684                   dl->cbcp.fsm.phone);
685        dl->cbcp.required = 1;
686        dl->cbcp.fsm.delay = 0;
687        datalink_NewState(dl, DATALINK_LCP);
688        datalink_AuthReInit(dl);
689        fsm_Close(&dl->physical->link.lcp.fsm);
690        break;
691
692      default:
693        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
694                   dl->name);
695        datalink_NewState(dl, DATALINK_LCP);
696        datalink_AuthReInit(dl);
697        fsm_Close(&dl->physical->link.lcp.fsm);
698        break;
699    }
700}
701
702void
703datalink_AuthNotOk(struct datalink *dl)
704{
705  datalink_NewState(dl, DATALINK_LCP);
706  datalink_AuthReInit(dl);
707  fsm_Close(&dl->physical->link.lcp.fsm);
708}
709
710static void
711datalink_LayerDown(void *v, struct fsm *fp)
712{
713  /* The given FSM has been told to come down */
714  struct datalink *dl = (struct datalink *)v;
715
716  if (fp->proto == PROTO_LCP) {
717    switch (dl->state) {
718      case DATALINK_OPEN:
719        peerid_Init(&dl->peer);
720        fsm2initial(&dl->physical->link.ccp.fsm);
721        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
722        (*dl->parent->LayerDown)(dl->parent->object, fp);
723        /* fall through (just in case) */
724
725      case DATALINK_CBCP:
726        if (!dl->cbcp.required)
727          cbcp_Down(&dl->cbcp);
728        /* fall through (just in case) */
729
730      case DATALINK_AUTH:
731        timer_Stop(&dl->pap.authtimer);
732        timer_Stop(&dl->chap.auth.authtimer);
733    }
734    datalink_NewState(dl, DATALINK_LCP);
735    datalink_AuthReInit(dl);
736  }
737}
738
739static void
740datalink_LayerFinish(void *v, struct fsm *fp)
741{
742  /* The given fsm is now down */
743  struct datalink *dl = (struct datalink *)v;
744
745  if (fp->proto == PROTO_LCP) {
746    fsm2initial(fp);
747    (*dl->parent->LayerFinish)(dl->parent->object, fp);
748    datalink_ComeDown(dl, CLOSE_NORMAL);
749  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
750    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
751}
752
753struct datalink *
754datalink_Create(const char *name, struct bundle *bundle, int type)
755{
756  struct datalink *dl;
757
758  dl = (struct datalink *)malloc(sizeof(struct datalink));
759  if (dl == NULL)
760    return dl;
761
762  dl->desc.type = DATALINK_DESCRIPTOR;
763  dl->desc.UpdateSet = datalink_UpdateSet;
764  dl->desc.IsSet = datalink_IsSet;
765  dl->desc.Read = datalink_Read;
766  dl->desc.Write = datalink_Write;
767
768  dl->state = DATALINK_CLOSED;
769
770  *dl->cfg.script.dial = '\0';
771  *dl->cfg.script.login = '\0';
772  *dl->cfg.script.logout = '\0';
773  *dl->cfg.script.hangup = '\0';
774  *dl->cfg.phone.list = '\0';
775  *dl->phone.list = '\0';
776  dl->phone.next = NULL;
777  dl->phone.alt = NULL;
778  dl->phone.chosen = "N/A";
779  dl->stayonline = 0;
780  dl->script.run = 1;
781  dl->script.packetmode = 1;
782  mp_linkInit(&dl->mp);
783
784  dl->bundle = bundle;
785  dl->next = NULL;
786
787  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
788
789  dl->dial.tries = 0;
790  dl->cfg.dial.max = 1;
791  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
792  dl->cfg.dial.timeout = DIAL_TIMEOUT;
793  dl->cfg.dial.inc = 0;
794  dl->cfg.dial.maxinc = 10;
795
796  dl->reconnect_tries = 0;
797  dl->cfg.reconnect.max = 0;
798  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
799
800  dl->cfg.callback.opmask = 0;
801  dl->cfg.cbcp.delay = 0;
802  *dl->cfg.cbcp.phone = '\0';
803  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
804
805  dl->name = strdup(name);
806  peerid_Init(&dl->peer);
807  dl->parent = &bundle->fsm;
808  dl->fsmp.LayerStart = datalink_LayerStart;
809  dl->fsmp.LayerUp = datalink_LayerUp;
810  dl->fsmp.LayerDown = datalink_LayerDown;
811  dl->fsmp.LayerFinish = datalink_LayerFinish;
812  dl->fsmp.object = dl;
813
814  if ((dl->physical = physical_Create(dl, type)) == NULL) {
815    free(dl->name);
816    free(dl);
817    return NULL;
818  }
819
820  pap_Init(&dl->pap, dl->physical);
821  chap_Init(&dl->chap, dl->physical);
822  cbcp_Init(&dl->cbcp, dl->physical);
823
824  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
825  chat_Init(&dl->chat, dl->physical, NULL, NULL);
826
827  log_Printf(LogPHASE, "%s: Created in %s state\n",
828             dl->name, datalink_State(dl));
829
830  return dl;
831}
832
833struct datalink *
834datalink_Clone(struct datalink *odl, const char *name)
835{
836  struct datalink *dl;
837
838  dl = (struct datalink *)malloc(sizeof(struct datalink));
839  if (dl == NULL)
840    return dl;
841
842  dl->desc.type = DATALINK_DESCRIPTOR;
843  dl->desc.UpdateSet = datalink_UpdateSet;
844  dl->desc.IsSet = datalink_IsSet;
845  dl->desc.Read = datalink_Read;
846  dl->desc.Write = datalink_Write;
847
848  dl->state = DATALINK_CLOSED;
849
850  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
851  mp_linkInit(&dl->mp);
852  *dl->phone.list = '\0';
853  dl->phone.next = NULL;
854  dl->phone.alt = NULL;
855  dl->phone.chosen = "N/A";
856  dl->bundle = odl->bundle;
857  dl->next = NULL;
858  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
859  dl->dial.tries = 0;
860  dl->reconnect_tries = 0;
861  dl->name = strdup(name);
862  peerid_Init(&dl->peer);
863  dl->parent = odl->parent;
864  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
865  dl->fsmp.object = dl;
866
867  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
868    free(dl->name);
869    free(dl);
870    return NULL;
871  }
872  pap_Init(&dl->pap, dl->physical);
873  dl->pap.cfg = odl->pap.cfg;
874
875  chap_Init(&dl->chap, dl->physical);
876  dl->chap.auth.cfg = odl->chap.auth.cfg;
877
878  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
879  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
880         sizeof dl->physical->link.lcp.cfg);
881  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
882         sizeof dl->physical->link.ccp.cfg);
883  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
884         sizeof dl->physical->async.cfg);
885
886  cbcp_Init(&dl->cbcp, dl->physical);
887
888  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
889  chat_Init(&dl->chat, dl->physical, NULL, NULL);
890
891  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
892             dl->name, datalink_State(dl));
893
894  return dl;
895}
896
897struct datalink *
898datalink_Destroy(struct datalink *dl)
899{
900  struct datalink *result;
901
902  if (dl->state != DATALINK_CLOSED) {
903    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
904              datalink_State(dl));
905    switch (dl->state) {
906      case DATALINK_HANGUP:
907      case DATALINK_DIAL:
908      case DATALINK_LOGIN:
909        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
910        break;
911    }
912  }
913
914  timer_Stop(&dl->dial.timer);
915  result = dl->next;
916  physical_Destroy(dl->physical);
917  free(dl->name);
918  free(dl);
919
920  return result;
921}
922
923void
924datalink_Up(struct datalink *dl, int runscripts, int packetmode)
925{
926  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
927    /* Ignore scripts */
928    runscripts = 0;
929
930  switch (dl->state) {
931    case DATALINK_CLOSED:
932      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
933          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
934        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
935      datalink_NewState(dl, DATALINK_OPENING);
936      dl->reconnect_tries =
937        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
938      dl->dial.tries = dl->cfg.dial.max;
939      dl->script.run = runscripts;
940      dl->script.packetmode = packetmode;
941      break;
942
943    case DATALINK_OPENING:
944      if (!dl->script.run && runscripts)
945        dl->script.run = 1;
946      /* fall through */
947
948    case DATALINK_DIAL:
949    case DATALINK_LOGIN:
950    case DATALINK_READY:
951      if (!dl->script.packetmode && packetmode) {
952        dl->script.packetmode = 1;
953        if (dl->state == DATALINK_READY)
954          datalink_LoginDone(dl);
955      }
956      break;
957  }
958}
959
960void
961datalink_Close(struct datalink *dl, int how)
962{
963  /* Please close */
964  switch (dl->state) {
965    case DATALINK_OPEN:
966      peerid_Init(&dl->peer);
967      fsm2initial(&dl->physical->link.ccp.fsm);
968      /* fall through */
969
970    case DATALINK_CBCP:
971    case DATALINK_AUTH:
972    case DATALINK_LCP:
973      datalink_AuthReInit(dl);
974      fsm_Close(&dl->physical->link.lcp.fsm);
975      if (how != CLOSE_NORMAL) {
976        dl->dial.tries = -1;
977        dl->reconnect_tries = 0;
978        if (how == CLOSE_LCP)
979          dl->stayonline = 1;
980      }
981      break;
982
983    default:
984      datalink_ComeDown(dl, how);
985  }
986}
987
988void
989datalink_Down(struct datalink *dl, int how)
990{
991  /* Carrier is lost */
992  switch (dl->state) {
993    case DATALINK_OPEN:
994      peerid_Init(&dl->peer);
995      fsm2initial(&dl->physical->link.ccp.fsm);
996      /* fall through */
997
998    case DATALINK_CBCP:
999    case DATALINK_AUTH:
1000    case DATALINK_LCP:
1001      fsm2initial(&dl->physical->link.lcp.fsm);
1002      /* fall through */
1003
1004    default:
1005      datalink_ComeDown(dl, how);
1006  }
1007}
1008
1009void
1010datalink_StayDown(struct datalink *dl)
1011{
1012  dl->reconnect_tries = 0;
1013}
1014
1015void
1016datalink_DontHangup(struct datalink *dl)
1017{
1018  if (dl->state >= DATALINK_LCP)
1019    dl->stayonline = 1;
1020}
1021
1022int
1023datalink_Show(struct cmdargs const *arg)
1024{
1025  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1026  prompt_Printf(arg->prompt, " State:              %s\n",
1027                datalink_State(arg->cx));
1028  prompt_Printf(arg->prompt, " Peer name:          ");
1029  if (*arg->cx->peer.authname)
1030    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1031  else if (arg->cx->state == DATALINK_OPEN)
1032    prompt_Printf(arg->prompt, "None requested\n");
1033  else
1034    prompt_Printf(arg->prompt, "N/A\n");
1035  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1036                mp_Enddisc(arg->cx->peer.enddisc.class,
1037                           arg->cx->peer.enddisc.address,
1038                           arg->cx->peer.enddisc.len));
1039
1040  prompt_Printf(arg->prompt, "\nDefaults:\n");
1041  prompt_Printf(arg->prompt, " Phone List:         %s\n",
1042                arg->cx->cfg.phone.list);
1043  if (arg->cx->cfg.dial.max)
1044    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1045                  arg->cx->cfg.dial.max);
1046  else
1047    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1048  if (arg->cx->cfg.dial.next_timeout >= 0)
1049    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1050  else
1051    prompt_Printf(arg->prompt, "random/");
1052  if (arg->cx->cfg.dial.timeout >= 0)
1053    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1054  else
1055    prompt_Printf(arg->prompt, "random\n");
1056  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1057                arg->cx->cfg.reconnect.max);
1058  if (arg->cx->cfg.reconnect.timeout > 0)
1059    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1060  else
1061    prompt_Printf(arg->prompt, "random\n");
1062  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1063                PHYS_DIRECT ?  "accepted: " : "requested:");
1064  if (!arg->cx->cfg.callback.opmask)
1065    prompt_Printf(arg->prompt, "none\n");
1066  else {
1067    int comma = 0;
1068
1069    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1070      prompt_Printf(arg->prompt, "none");
1071      comma = 1;
1072    }
1073    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1074      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1075      comma = 1;
1076    }
1077    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1078      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1079      if (arg->cx->physical->type != PHYS_DIRECT)
1080        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1081      comma = 1;
1082    }
1083    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1084      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1085      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1086                    arg->cx->cfg.cbcp.delay);
1087      prompt_Printf(arg->prompt, "                     phone: ");
1088      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1089        if (arg->cx->physical->type & PHYS_DIRECT)
1090          prompt_Printf(arg->prompt, "Caller decides\n");
1091        else
1092          prompt_Printf(arg->prompt, "Dialback server decides\n");
1093      } else
1094        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1095      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1096                    arg->cx->cfg.cbcp.fsmretry);
1097    } else
1098      prompt_Printf(arg->prompt, "\n");
1099  }
1100
1101  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1102                arg->cx->cfg.script.dial);
1103  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1104                arg->cx->cfg.script.login);
1105  prompt_Printf(arg->prompt, " Logout Script:      %s\n",
1106                arg->cx->cfg.script.logout);
1107  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1108                arg->cx->cfg.script.hangup);
1109  return 0;
1110}
1111
1112int
1113datalink_SetReconnect(struct cmdargs const *arg)
1114{
1115  if (arg->argc == arg->argn+2) {
1116    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1117    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1118    return 0;
1119  }
1120  return -1;
1121}
1122
1123int
1124datalink_SetRedial(struct cmdargs const *arg)
1125{
1126  const char *sep, *osep;
1127  int timeout, inc, maxinc, tries;
1128
1129  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1130    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1131	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1132      arg->cx->cfg.dial.timeout = -1;
1133      randinit();
1134    } else {
1135      timeout = atoi(arg->argv[arg->argn]);
1136
1137      if (timeout >= 0)
1138	arg->cx->cfg.dial.timeout = timeout;
1139      else {
1140	log_Printf(LogWARN, "Invalid redial timeout\n");
1141	return -1;
1142      }
1143    }
1144
1145    sep = strchr(arg->argv[arg->argn], '+');
1146    if (sep) {
1147      inc = atoi(++sep);
1148      osep = sep;
1149      if (inc >= 0)
1150        arg->cx->cfg.dial.inc = inc;
1151      else {
1152        log_Printf(LogWARN, "Invalid timeout increment\n");
1153        return -1;
1154      }
1155      sep = strchr(sep, '-');
1156      if (sep) {
1157        maxinc = atoi(++sep);
1158        if (maxinc >= 0)
1159          arg->cx->cfg.dial.maxinc = maxinc;
1160        else {
1161          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1162          return -1;
1163        }
1164      } else {
1165        /* Default timeout increment */
1166        arg->cx->cfg.dial.maxinc = 10;
1167        sep = osep;
1168      }
1169    } else {
1170      /* Default timeout increment & max increment */
1171      arg->cx->cfg.dial.inc = 0;
1172      arg->cx->cfg.dial.maxinc = 10;
1173      sep = arg->argv[arg->argn];
1174    }
1175
1176    sep = strchr(sep, '.');
1177    if (sep) {
1178      if (strcasecmp(++sep, "random") == 0) {
1179	arg->cx->cfg.dial.next_timeout = -1;
1180	randinit();
1181      } else {
1182	timeout = atoi(sep);
1183	if (timeout >= 0)
1184	  arg->cx->cfg.dial.next_timeout = timeout;
1185	else {
1186	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1187	  return -1;
1188	}
1189      }
1190    } else
1191      /* Default next timeout */
1192      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1193
1194    if (arg->argc == arg->argn+2) {
1195      tries = atoi(arg->argv[arg->argn+1]);
1196
1197      if (tries >= 0) {
1198	arg->cx->cfg.dial.max = tries;
1199      } else {
1200	log_Printf(LogWARN, "Invalid retry value\n");
1201	return 1;
1202      }
1203    }
1204    return 0;
1205  }
1206
1207  return -1;
1208}
1209
1210static const char *states[] = {
1211  "closed",
1212  "opening",
1213  "hangup",
1214  "dial",
1215  "carrier",
1216  "logout",
1217  "login",
1218  "ready",
1219  "lcp",
1220  "auth",
1221  "cbcp",
1222  "open"
1223};
1224
1225const char *
1226datalink_State(struct datalink *dl)
1227{
1228  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1229    return "unknown";
1230  return states[dl->state];
1231}
1232
1233static void
1234datalink_NewState(struct datalink *dl, int state)
1235{
1236  if (state != dl->state) {
1237    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1238      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1239                 states[state]);
1240      dl->state = state;
1241    } else
1242      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1243  }
1244}
1245
1246struct datalink *
1247iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1248             int fd, int *auxfd, int *nauxfd)
1249{
1250  struct datalink *dl, *cdl;
1251  struct fsm_retry copy;
1252  char *oname;
1253
1254  dl = (struct datalink *)iov[(*niov)++].iov_base;
1255  dl->name = iov[*niov].iov_base;
1256
1257  if (dl->name[DATALINK_MAXNAME-1]) {
1258    dl->name[DATALINK_MAXNAME-1] = '\0';
1259    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1260      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1261  }
1262
1263  /* Make sure the name is unique ! */
1264  oname = NULL;
1265  do {
1266    for (cdl = bundle->links; cdl; cdl = cdl->next)
1267      if (!strcasecmp(dl->name, cdl->name)) {
1268        if (oname)
1269          free(datalink_NextName(dl));
1270        else
1271          oname = datalink_NextName(dl);
1272        break;	/* Keep renaming 'till we have no conflicts */
1273      }
1274  } while (cdl);
1275
1276  if (oname) {
1277    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1278    free(oname);
1279  } else {
1280    dl->name = strdup(dl->name);
1281    free(iov[*niov].iov_base);
1282  }
1283  (*niov)++;
1284
1285  dl->desc.type = DATALINK_DESCRIPTOR;
1286  dl->desc.UpdateSet = datalink_UpdateSet;
1287  dl->desc.IsSet = datalink_IsSet;
1288  dl->desc.Read = datalink_Read;
1289  dl->desc.Write = datalink_Write;
1290
1291  mp_linkInit(&dl->mp);
1292  *dl->phone.list = '\0';
1293  dl->phone.next = NULL;
1294  dl->phone.alt = NULL;
1295  dl->phone.chosen = "N/A";
1296
1297  dl->bundle = bundle;
1298  dl->next = NULL;
1299  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1300  dl->dial.tries = 0;
1301  dl->reconnect_tries = 0;
1302  dl->parent = &bundle->fsm;
1303  dl->fsmp.LayerStart = datalink_LayerStart;
1304  dl->fsmp.LayerUp = datalink_LayerUp;
1305  dl->fsmp.LayerDown = datalink_LayerDown;
1306  dl->fsmp.LayerFinish = datalink_LayerFinish;
1307  dl->fsmp.object = dl;
1308
1309  dl->physical = iov2physical(dl, iov, niov, maxiov, fd, auxfd, nauxfd);
1310
1311  if (!dl->physical) {
1312    free(dl->name);
1313    free(dl);
1314    dl = NULL;
1315  } else {
1316    copy = dl->pap.cfg.fsm;
1317    pap_Init(&dl->pap, dl->physical);
1318    dl->pap.cfg.fsm = copy;
1319
1320    copy = dl->chap.auth.cfg.fsm;
1321    chap_Init(&dl->chap, dl->physical);
1322    dl->chap.auth.cfg.fsm = copy;
1323
1324    cbcp_Init(&dl->cbcp, dl->physical);
1325
1326    memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
1327    chat_Init(&dl->chat, dl->physical, NULL, NULL);
1328
1329    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1330              dl->name, datalink_State(dl));
1331  }
1332
1333  return dl;
1334}
1335
1336int
1337datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1338             int *auxfd, int *nauxfd, pid_t newpid)
1339{
1340  /* If `dl' is NULL, we're allocating before a Fromiov() */
1341  int link_fd;
1342
1343  if (dl) {
1344    timer_Stop(&dl->dial.timer);
1345    /* The following is purely for the sake of paranoia */
1346    cbcp_Down(&dl->cbcp);
1347    timer_Stop(&dl->pap.authtimer);
1348    timer_Stop(&dl->chap.auth.authtimer);
1349  }
1350
1351  if (*niov >= maxiov - 1) {
1352    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1353    if (dl) {
1354      free(dl->name);
1355      free(dl);
1356    }
1357    return -1;
1358  }
1359
1360  iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl);
1361  iov[(*niov)++].iov_len = sizeof *dl;
1362  iov[*niov].iov_base =
1363    dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME);
1364  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1365
1366  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, auxfd,
1367                         nauxfd, newpid);
1368
1369  if (link_fd == -1 && dl) {
1370    free(dl->name);
1371    free(dl);
1372  }
1373
1374  return link_fd;
1375}
1376
1377void
1378datalink_Rename(struct datalink *dl, const char *name)
1379{
1380  free(dl->name);
1381  dl->physical->link.name = dl->name = strdup(name);
1382}
1383
1384char *
1385datalink_NextName(struct datalink *dl)
1386{
1387  int f, n;
1388  char *name, *oname;
1389
1390  n = strlen(dl->name);
1391  name = (char *)malloc(n+3);
1392  for (f = n - 1; f >= 0; f--)
1393    if (!isdigit(dl->name[f]))
1394      break;
1395  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1396  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1397  oname = dl->name;
1398  dl->name = name;
1399  /* our physical link name isn't updated (it probably isn't created yet) */
1400  return oname;
1401}
1402
1403int
1404datalink_SetMode(struct datalink *dl, int mode)
1405{
1406  if (!physical_SetMode(dl->physical, mode))
1407    return 0;
1408  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1409    dl->script.run = 0;
1410  if (dl->physical->type == PHYS_DIRECT)
1411    dl->reconnect_tries = 0;
1412  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND) && dl->state <= DATALINK_READY)
1413    datalink_Up(dl, 1, 1);
1414  return 1;
1415}
1416
1417int
1418datalink_GetDialTimeout(struct datalink *dl)
1419{
1420  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1421
1422  if (dl->dial.incs < dl->cfg.dial.maxinc)
1423    dl->dial.incs++;
1424
1425  return result;
1426}
1427