datalink.c revision 40483 
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 *	$Id: datalink.c,v 1.19 1998/08/18 00:53:48 brian Exp $
27 */
28
29#include <sys/types.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 "mbuf.h"
43#include "log.h"
44#include "defs.h"
45#include "timer.h"
46#include "fsm.h"
47#include "lcp.h"
48#include "descriptor.h"
49#include "lqr.h"
50#include "hdlc.h"
51#include "async.h"
52#include "throughput.h"
53#include "ccp.h"
54#include "link.h"
55#include "physical.h"
56#include "iplist.h"
57#include "slcompress.h"
58#include "ipcp.h"
59#include "filter.h"
60#include "mp.h"
61#include "bundle.h"
62#include "chat.h"
63#include "auth.h"
64#include "modem.h"
65#include "prompt.h"
66#include "lcpproto.h"
67#include "pap.h"
68#include "chap.h"
69#include "command.h"
70#include "cbcp.h"
71#include "datalink.h"
72
73static void datalink_LoginDone(struct datalink *);
74static void datalink_NewState(struct datalink *, int);
75
76static void
77datalink_OpenTimeout(void *v)
78{
79  struct datalink *dl = (struct datalink *)v;
80
81  timer_Stop(&dl->dial_timer);
82  if (dl->state == DATALINK_OPENING)
83    log_Printf(LogPHASE, "%s: Redial timer expired.\n", dl->name);
84}
85
86static void
87datalink_StartDialTimer(struct datalink *dl, int Timeout)
88{
89  timer_Stop(&dl->dial_timer);
90
91  if (Timeout) {
92    if (Timeout > 0)
93      dl->dial_timer.load = Timeout * SECTICKS;
94    else
95      dl->dial_timer.load = (random() % DIAL_TIMEOUT) * SECTICKS;
96    dl->dial_timer.func = datalink_OpenTimeout;
97    dl->dial_timer.name = "dial";
98    dl->dial_timer.arg = dl;
99    timer_Start(&dl->dial_timer);
100    if (dl->state == DATALINK_OPENING)
101      log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
102                dl->name, Timeout);
103  }
104}
105
106static void
107datalink_HangupDone(struct datalink *dl)
108{
109  if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
110      physical_GetFD(dl->physical) != -1) {
111    /* Don't close our modem if the link is dedicated */
112    datalink_LoginDone(dl);
113    return;
114  }
115
116  modem_Close(dl->physical);
117  dl->phone.chosen = "N/A";
118
119  if (dl->cbcp.required) {
120    log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
121    dl->cfg.callback.opmask = 0;
122    strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
123            sizeof dl->cfg.phone.list - 1);
124    dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
125    dl->phone.alt = dl->phone.next = NULL;
126    dl->reconnect_tries = dl->cfg.reconnect.max;
127    dl->dial_tries = dl->cfg.dial.max;
128    dl->script.run = 1;
129    dl->script.packetmode = 1;
130    if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
131      log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
132    bundle_LinksRemoved(dl->bundle);
133    if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
134      dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
135    datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
136    cbcp_Down(&dl->cbcp);
137    datalink_NewState(dl, DATALINK_OPENING);
138  } else if (dl->bundle->CleaningUp ||
139      (dl->physical->type == PHYS_DIRECT) ||
140      ((!dl->dial_tries || (dl->dial_tries < 0 && !dl->reconnect_tries)) &&
141       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
142    datalink_NewState(dl, DATALINK_CLOSED);
143    dl->dial_tries = -1;
144    dl->reconnect_tries = 0;
145    bundle_LinkClosed(dl->bundle, dl);
146    if (!dl->bundle->CleaningUp)
147      datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
148  } else {
149    datalink_NewState(dl, DATALINK_OPENING);
150    if (dl->dial_tries < 0) {
151      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
152      dl->dial_tries = dl->cfg.dial.max;
153      dl->reconnect_tries--;
154    } else {
155      if (dl->phone.next == NULL)
156        datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
157      else
158        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
159    }
160  }
161}
162
163static const char *
164datalink_ChoosePhoneNumber(struct datalink *dl)
165{
166  char *phone;
167
168  if (dl->phone.alt == NULL) {
169    if (dl->phone.next == NULL) {
170      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
171      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
172      dl->phone.next = dl->phone.list;
173    }
174    dl->phone.alt = strsep(&dl->phone.next, ":");
175  }
176  phone = strsep(&dl->phone.alt, "|");
177  dl->phone.chosen = *phone ? phone : "[NONE]";
178  if (*phone)
179    log_Printf(LogPHASE, "Phone: %s\n", phone);
180  return phone;
181}
182
183static void
184datalink_LoginDone(struct datalink *dl)
185{
186  if (!dl->script.packetmode) {
187    dl->dial_tries = -1;
188    datalink_NewState(dl, DATALINK_READY);
189  } else if (modem_Raw(dl->physical, dl->bundle) < 0) {
190    dl->dial_tries = 0;
191    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
192    if (dl->script.run) {
193      datalink_NewState(dl, DATALINK_HANGUP);
194      modem_Offline(dl->physical);
195      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
196    } else {
197      timer_Stop(&dl->physical->Timer);
198      if (dl->physical->type == PHYS_DEDICATED)
199        /* force a redial timeout */
200        modem_Close(dl->physical);
201      datalink_HangupDone(dl);
202    }
203  } else {
204    dl->dial_tries = -1;
205
206    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
207    async_Init(&dl->physical->async);
208
209    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
210              0 : dl->physical->link.lcp.cfg.openmode);
211    ccp_Setup(&dl->physical->link.ccp);
212
213    datalink_NewState(dl, DATALINK_LCP);
214    fsm_Up(&dl->physical->link.lcp.fsm);
215    fsm_Open(&dl->physical->link.lcp.fsm);
216  }
217}
218
219static int
220datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
221                   int *n)
222{
223  struct datalink *dl = descriptor2datalink(d);
224  int result;
225
226  result = 0;
227  switch (dl->state) {
228    case DATALINK_CLOSED:
229      if ((dl->physical->type &
230           (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|PHYS_DDIAL)) &&
231          !bundle_IsDead(dl->bundle))
232        /*
233         * Our first time in - DEDICATED & DDIAL never come down, and
234         * DIRECT & BACKGROUND get deleted when they enter DATALINK_CLOSED.
235         * Go to DATALINK_OPENING via datalink_Up() and fall through.
236         */
237        datalink_Up(dl, 1, 1);
238      else
239        break;
240      /* fall through */
241
242    case DATALINK_OPENING:
243      if (dl->dial_timer.state != TIMER_RUNNING) {
244        if (--dl->dial_tries < 0)
245          dl->dial_tries = 0;
246        if (modem_Open(dl->physical, dl->bundle) >= 0) {
247          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
248                           "Type `~?' for help\r\n", dl->name,
249                           dl->physical->name.full);
250          if (dl->script.run) {
251            datalink_NewState(dl, DATALINK_DIAL);
252            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial, 1,
253                      datalink_ChoosePhoneNumber(dl));
254            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
255                dl->cfg.dial.max)
256              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
257                        dl->name, dl->cfg.dial.max - dl->dial_tries,
258                        dl->cfg.dial.max);
259            return datalink_UpdateSet(d, r, w, e, n);
260          } else
261            datalink_LoginDone(dl);
262        } else {
263          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
264              dl->cfg.dial.max)
265            log_Printf(LogCHAT, "Failed to open modem (attempt %u of %d)\n",
266                       dl->cfg.dial.max - dl->dial_tries, dl->cfg.dial.max);
267          else
268            log_Printf(LogCHAT, "Failed to open modem\n");
269
270          if (dl->bundle->CleaningUp ||
271              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
272               dl->cfg.dial.max && dl->dial_tries == 0)) {
273            datalink_NewState(dl, DATALINK_CLOSED);
274            dl->reconnect_tries = 0;
275            dl->dial_tries = -1;
276            log_WritePrompts(dl, "Failed to open %s\n",
277                             dl->physical->name.full);
278            bundle_LinkClosed(dl->bundle, dl);
279          }
280          if (!dl->bundle->CleaningUp) {
281            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
282                             dl->physical->name.full, dl->cfg.dial.timeout);
283            datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
284          }
285        }
286      }
287      break;
288
289    case DATALINK_HANGUP:
290    case DATALINK_DIAL:
291    case DATALINK_LOGIN:
292      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
293      switch (dl->chat.state) {
294        case CHAT_DONE:
295          /* script succeeded */
296          chat_Destroy(&dl->chat);
297          switch(dl->state) {
298            case DATALINK_HANGUP:
299              datalink_HangupDone(dl);
300              break;
301            case DATALINK_DIAL:
302              datalink_NewState(dl, DATALINK_LOGIN);
303              chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, 0, NULL);
304              return datalink_UpdateSet(d, r, w, e, n);
305            case DATALINK_LOGIN:
306              datalink_LoginDone(dl);
307              break;
308          }
309          break;
310        case CHAT_FAILED:
311          /* Going down - script failed */
312          log_Printf(LogWARN, "Chat script failed\n");
313          chat_Destroy(&dl->chat);
314          switch(dl->state) {
315            case DATALINK_HANGUP:
316              datalink_HangupDone(dl);
317              break;
318            case DATALINK_DIAL:
319            case DATALINK_LOGIN:
320              datalink_NewState(dl, DATALINK_HANGUP);
321              modem_Offline(dl->physical);	/* Is this required ? */
322              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
323              return datalink_UpdateSet(d, r, w, e, n);
324          }
325          break;
326      }
327      break;
328
329    case DATALINK_READY:
330    case DATALINK_LCP:
331    case DATALINK_AUTH:
332    case DATALINK_CBCP:
333    case DATALINK_OPEN:
334      result = descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
335      break;
336  }
337  return result;
338}
339
340int
341datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
342{
343  return physical_RemoveFromSet(dl->physical, r, w, e);
344}
345
346static int
347datalink_IsSet(struct descriptor *d, const fd_set *fdset)
348{
349  struct datalink *dl = descriptor2datalink(d);
350
351  switch (dl->state) {
352    case DATALINK_CLOSED:
353    case DATALINK_OPENING:
354      break;
355
356    case DATALINK_HANGUP:
357    case DATALINK_DIAL:
358    case DATALINK_LOGIN:
359      return descriptor_IsSet(&dl->chat.desc, fdset);
360
361    case DATALINK_READY:
362    case DATALINK_LCP:
363    case DATALINK_AUTH:
364    case DATALINK_CBCP:
365    case DATALINK_OPEN:
366      return descriptor_IsSet(&dl->physical->desc, fdset);
367  }
368  return 0;
369}
370
371static void
372datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
373{
374  struct datalink *dl = descriptor2datalink(d);
375
376  switch (dl->state) {
377    case DATALINK_CLOSED:
378    case DATALINK_OPENING:
379      break;
380
381    case DATALINK_HANGUP:
382    case DATALINK_DIAL:
383    case DATALINK_LOGIN:
384      descriptor_Read(&dl->chat.desc, bundle, fdset);
385      break;
386
387    case DATALINK_READY:
388    case DATALINK_LCP:
389    case DATALINK_AUTH:
390    case DATALINK_CBCP:
391    case DATALINK_OPEN:
392      descriptor_Read(&dl->physical->desc, bundle, fdset);
393      break;
394  }
395}
396
397static int
398datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
399{
400  struct datalink *dl = descriptor2datalink(d);
401  int result = 0;
402
403  switch (dl->state) {
404    case DATALINK_CLOSED:
405    case DATALINK_OPENING:
406      break;
407
408    case DATALINK_HANGUP:
409    case DATALINK_DIAL:
410    case DATALINK_LOGIN:
411      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
412      break;
413
414    case DATALINK_READY:
415    case DATALINK_LCP:
416    case DATALINK_AUTH:
417    case DATALINK_CBCP:
418    case DATALINK_OPEN:
419      result = descriptor_Write(&dl->physical->desc, bundle, fdset);
420      break;
421  }
422
423  return result;
424}
425
426static void
427datalink_ComeDown(struct datalink *dl, int how)
428{
429  if (how != CLOSE_NORMAL) {
430    dl->dial_tries = -1;
431    dl->reconnect_tries = 0;
432    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
433      dl->stayonline = 1;
434  }
435
436  if (dl->state >= DATALINK_READY && dl->stayonline) {
437    dl->stayonline = 0;
438    timer_Stop(&dl->physical->Timer);
439    datalink_NewState(dl, DATALINK_READY);
440  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
441    modem_Offline(dl->physical);
442    chat_Destroy(&dl->chat);
443    if (dl->script.run && dl->state != DATALINK_OPENING) {
444      datalink_NewState(dl, DATALINK_HANGUP);
445      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
446    } else
447      datalink_HangupDone(dl);
448  }
449}
450
451static void
452datalink_LayerStart(void *v, struct fsm *fp)
453{
454  /* The given FSM is about to start up ! */
455  struct datalink *dl = (struct datalink *)v;
456
457  if (fp->proto == PROTO_LCP)
458    (*dl->parent->LayerStart)(dl->parent->object, fp);
459}
460
461static void
462datalink_LayerUp(void *v, struct fsm *fp)
463{
464  /* The given fsm is now up */
465  struct datalink *dl = (struct datalink *)v;
466
467  if (fp->proto == PROTO_LCP) {
468    datalink_GotAuthname(dl, "", 0);
469    dl->physical->link.lcp.auth_ineed = dl->physical->link.lcp.want_auth;
470    dl->physical->link.lcp.auth_iwait = dl->physical->link.lcp.his_auth;
471    if (dl->physical->link.lcp.his_auth || dl->physical->link.lcp.want_auth) {
472      if (bundle_Phase(dl->bundle) == PHASE_ESTABLISH)
473        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
474      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
475                Auth2Nam(dl->physical->link.lcp.his_auth),
476                Auth2Nam(dl->physical->link.lcp.want_auth));
477      if (dl->physical->link.lcp.his_auth == PROTO_PAP)
478        auth_StartChallenge(&dl->pap, dl->physical, pap_SendChallenge);
479      if (dl->physical->link.lcp.want_auth == PROTO_CHAP)
480        auth_StartChallenge(&dl->chap.auth, dl->physical, chap_SendChallenge);
481    } else
482      datalink_AuthOk(dl);
483  }
484}
485
486void
487datalink_GotAuthname(struct datalink *dl, const char *name, int len)
488{
489  if (len >= sizeof dl->peer.authname)
490    len = sizeof dl->peer.authname - 1;
491  strncpy(dl->peer.authname, name, len);
492  dl->peer.authname[len] = '\0';
493}
494
495void
496datalink_NCPUp(struct datalink *dl)
497{
498  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
499
500  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
501    /* we've authenticated in multilink mode ! */
502    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
503      case MP_LINKSENT:
504        /* We've handed the link off to another ppp (well, we will soon) ! */
505        return;
506      case MP_UP:
507        /* First link in the bundle */
508        auth_Select(dl->bundle, dl->peer.authname);
509        /* fall through */
510      case MP_ADDED:
511        /* We're in multilink mode ! */
512        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
513        break;
514      case MP_FAILED:
515        datalink_AuthNotOk(dl);
516        return;
517    }
518  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
519    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
520    datalink_NewState(dl, DATALINK_OPEN);
521    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
522    return;
523  } else {
524    dl->bundle->ncp.mp.peer = dl->peer;
525    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
526    auth_Select(dl->bundle, dl->peer.authname);
527  }
528
529  if (ccpok) {
530    fsm_Up(&dl->physical->link.ccp.fsm);
531    fsm_Open(&dl->physical->link.ccp.fsm);
532  }
533  datalink_NewState(dl, DATALINK_OPEN);
534  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
535  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
536}
537
538void
539datalink_CBCPComplete(struct datalink *dl)
540{
541  datalink_NewState(dl, DATALINK_LCP);
542  fsm_Close(&dl->physical->link.lcp.fsm);
543}
544
545void
546datalink_CBCPFailed(struct datalink *dl)
547{
548  cbcp_Down(&dl->cbcp);
549  datalink_CBCPComplete(dl);
550}
551
552void
553datalink_AuthOk(struct datalink *dl)
554{
555  if (dl->physical->link.lcp.his_callback.opmask ==
556      CALLBACK_BIT(CALLBACK_CBCP) ||
557      dl->physical->link.lcp.want_callback.opmask ==
558      CALLBACK_BIT(CALLBACK_CBCP)) {
559    datalink_NewState(dl, DATALINK_CBCP);
560    cbcp_Up(&dl->cbcp);
561  } else if (dl->physical->link.lcp.want_callback.opmask) {
562    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
563    datalink_NewState(dl, DATALINK_LCP);
564    fsm_Close(&dl->physical->link.lcp.fsm);
565  } else
566    switch (dl->physical->link.lcp.his_callback.opmask) {
567      case 0:
568        datalink_NCPUp(dl);
569        break;
570
571      case CALLBACK_BIT(CALLBACK_AUTH):
572        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
573                          sizeof dl->cbcp.fsm.phone);
574        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
575          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
576                     dl->peer.authname);
577          *dl->cbcp.fsm.phone = '\0';
578        } else {
579          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
580          if (ptr)
581            *ptr = '\0';	/* Call back on the first number */
582          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
583                     dl->cbcp.fsm.phone);
584          dl->cbcp.required = 1;
585        }
586        dl->cbcp.fsm.delay = 0;
587        datalink_NewState(dl, DATALINK_LCP);
588        fsm_Close(&dl->physical->link.lcp.fsm);
589        break;
590
591      case CALLBACK_BIT(CALLBACK_E164):
592        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
593                sizeof dl->cbcp.fsm.phone - 1);
594        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
595        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
596                   dl->cbcp.fsm.phone);
597        dl->cbcp.required = 1;
598        dl->cbcp.fsm.delay = 0;
599        datalink_NewState(dl, DATALINK_LCP);
600        fsm_Close(&dl->physical->link.lcp.fsm);
601        break;
602
603      default:
604        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
605                   dl->name);
606        datalink_NewState(dl, DATALINK_LCP);
607        fsm_Close(&dl->physical->link.lcp.fsm);
608        break;
609    }
610}
611
612void
613datalink_AuthNotOk(struct datalink *dl)
614{
615  datalink_NewState(dl, DATALINK_LCP);
616  fsm_Close(&dl->physical->link.lcp.fsm);
617}
618
619static void
620datalink_LayerDown(void *v, struct fsm *fp)
621{
622  /* The given FSM has been told to come down */
623  struct datalink *dl = (struct datalink *)v;
624
625  if (fp->proto == PROTO_LCP) {
626    switch (dl->state) {
627      case DATALINK_OPEN:
628        peerid_Init(&dl->peer);
629        fsm2initial(&dl->physical->link.ccp.fsm);
630        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
631        (*dl->parent->LayerDown)(dl->parent->object, fp);
632        /* fall through (just in case) */
633
634      case DATALINK_CBCP:
635        if (!dl->cbcp.required)
636          cbcp_Down(&dl->cbcp);
637        /* fall through (just in case) */
638
639      case DATALINK_AUTH:
640        timer_Stop(&dl->pap.authtimer);
641        timer_Stop(&dl->chap.auth.authtimer);
642    }
643    datalink_NewState(dl, DATALINK_LCP);
644  }
645}
646
647static void
648datalink_LayerFinish(void *v, struct fsm *fp)
649{
650  /* The given fsm is now down */
651  struct datalink *dl = (struct datalink *)v;
652
653  if (fp->proto == PROTO_LCP) {
654    fsm2initial(fp);
655    (*dl->parent->LayerFinish)(dl->parent->object, fp);
656    datalink_ComeDown(dl, CLOSE_NORMAL);
657  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
658    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
659}
660
661struct datalink *
662datalink_Create(const char *name, struct bundle *bundle, int type)
663{
664  struct datalink *dl;
665
666  dl = (struct datalink *)malloc(sizeof(struct datalink));
667  if (dl == NULL)
668    return dl;
669
670  dl->desc.type = DATALINK_DESCRIPTOR;
671  dl->desc.UpdateSet = datalink_UpdateSet;
672  dl->desc.IsSet = datalink_IsSet;
673  dl->desc.Read = datalink_Read;
674  dl->desc.Write = datalink_Write;
675
676  dl->state = DATALINK_CLOSED;
677
678  *dl->cfg.script.dial = '\0';
679  *dl->cfg.script.login = '\0';
680  *dl->cfg.script.hangup = '\0';
681  *dl->cfg.phone.list = '\0';
682  *dl->phone.list = '\0';
683  dl->phone.next = NULL;
684  dl->phone.alt = NULL;
685  dl->phone.chosen = "N/A";
686  dl->stayonline = 0;
687  dl->script.run = 1;
688  dl->script.packetmode = 1;
689  mp_linkInit(&dl->mp);
690
691  dl->bundle = bundle;
692  dl->next = NULL;
693
694  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
695
696  dl->dial_tries = 0;
697  dl->cfg.dial.max = 1;
698  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
699  dl->cfg.dial.timeout = DIAL_TIMEOUT;
700
701  dl->reconnect_tries = 0;
702  dl->cfg.reconnect.max = 0;
703  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
704
705  dl->cfg.callback.opmask = 0;
706  dl->cfg.cbcp.delay = 0;
707  *dl->cfg.cbcp.phone = '\0';
708  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
709
710  dl->name = strdup(name);
711  peerid_Init(&dl->peer);
712  dl->parent = &bundle->fsm;
713  dl->fsmp.LayerStart = datalink_LayerStart;
714  dl->fsmp.LayerUp = datalink_LayerUp;
715  dl->fsmp.LayerDown = datalink_LayerDown;
716  dl->fsmp.LayerFinish = datalink_LayerFinish;
717  dl->fsmp.object = dl;
718
719  auth_Init(&dl->pap);
720  auth_Init(&dl->chap.auth);
721
722  if ((dl->physical = modem_Create(dl, type)) == NULL) {
723    free(dl->name);
724    free(dl);
725    return NULL;
726  }
727  cbcp_Init(&dl->cbcp, dl->physical);
728  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
729
730  log_Printf(LogPHASE, "%s: Created in %s state\n",
731             dl->name, datalink_State(dl));
732
733  return dl;
734}
735
736struct datalink *
737datalink_Clone(struct datalink *odl, const char *name)
738{
739  struct datalink *dl;
740
741  dl = (struct datalink *)malloc(sizeof(struct datalink));
742  if (dl == NULL)
743    return dl;
744
745  dl->desc.type = DATALINK_DESCRIPTOR;
746  dl->desc.UpdateSet = datalink_UpdateSet;
747  dl->desc.IsSet = datalink_IsSet;
748  dl->desc.Read = datalink_Read;
749  dl->desc.Write = datalink_Write;
750
751  dl->state = DATALINK_CLOSED;
752
753  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
754  mp_linkInit(&dl->mp);
755  *dl->phone.list = '\0';
756  dl->phone.next = NULL;
757  dl->phone.alt = NULL;
758  dl->phone.chosen = "N/A";
759  dl->bundle = odl->bundle;
760  dl->next = NULL;
761  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
762  dl->dial_tries = 0;
763  dl->reconnect_tries = 0;
764  dl->name = strdup(name);
765  peerid_Init(&dl->peer);
766  dl->parent = odl->parent;
767  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
768  dl->fsmp.object = dl;
769  auth_Init(&dl->pap);
770  dl->pap.cfg.fsmretry = odl->pap.cfg.fsmretry;
771
772  auth_Init(&dl->chap.auth);
773  dl->chap.auth.cfg.fsmretry = odl->chap.auth.cfg.fsmretry;
774
775  if ((dl->physical = modem_Create(dl, PHYS_INTERACTIVE)) == NULL) {
776    free(dl->name);
777    free(dl);
778    return NULL;
779  }
780  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
781  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
782         sizeof dl->physical->link.lcp.cfg);
783  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
784         sizeof dl->physical->link.ccp.cfg);
785  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
786         sizeof dl->physical->async.cfg);
787
788  cbcp_Init(&dl->cbcp, dl->physical);
789  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
790
791  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
792             dl->name, datalink_State(dl));
793
794  return dl;
795}
796
797struct datalink *
798datalink_Destroy(struct datalink *dl)
799{
800  struct datalink *result;
801
802  if (dl->state != DATALINK_CLOSED) {
803    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
804              datalink_State(dl));
805    switch (dl->state) {
806      case DATALINK_HANGUP:
807      case DATALINK_DIAL:
808      case DATALINK_LOGIN:
809        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
810        break;
811    }
812  }
813
814  result = dl->next;
815  modem_Destroy(dl->physical);
816  free(dl->name);
817  free(dl);
818
819  return result;
820}
821
822void
823datalink_Up(struct datalink *dl, int runscripts, int packetmode)
824{
825  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
826    /* Ignore scripts */
827    runscripts = 0;
828
829  switch (dl->state) {
830    case DATALINK_CLOSED:
831      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
832          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
833        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
834      datalink_NewState(dl, DATALINK_OPENING);
835      dl->reconnect_tries =
836        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
837      dl->dial_tries = dl->cfg.dial.max;
838      dl->script.run = runscripts;
839      dl->script.packetmode = packetmode;
840      break;
841
842    case DATALINK_OPENING:
843      if (!dl->script.run && runscripts)
844        dl->script.run = 1;
845      /* fall through */
846
847    case DATALINK_DIAL:
848    case DATALINK_LOGIN:
849    case DATALINK_READY:
850      if (!dl->script.packetmode && packetmode) {
851        dl->script.packetmode = 1;
852        if (dl->state == DATALINK_READY)
853          datalink_LoginDone(dl);
854      }
855      break;
856  }
857}
858
859void
860datalink_Close(struct datalink *dl, int how)
861{
862  /* Please close */
863  switch (dl->state) {
864    case DATALINK_OPEN:
865      peerid_Init(&dl->peer);
866      fsm2initial(&dl->physical->link.ccp.fsm);
867      /* fall through */
868
869    case DATALINK_CBCP:
870    case DATALINK_AUTH:
871    case DATALINK_LCP:
872      fsm_Close(&dl->physical->link.lcp.fsm);
873      if (how != CLOSE_NORMAL) {
874        dl->dial_tries = -1;
875        dl->reconnect_tries = 0;
876        if (how == CLOSE_LCP)
877          dl->stayonline = 1;
878      }
879      break;
880
881    default:
882      datalink_ComeDown(dl, how);
883  }
884}
885
886void
887datalink_Down(struct datalink *dl, int how)
888{
889  /* Carrier is lost */
890  switch (dl->state) {
891    case DATALINK_OPEN:
892      peerid_Init(&dl->peer);
893      fsm2initial(&dl->physical->link.ccp.fsm);
894      /* fall through */
895
896    case DATALINK_CBCP:
897    case DATALINK_AUTH:
898    case DATALINK_LCP:
899      fsm2initial(&dl->physical->link.lcp.fsm);
900      /* fall through */
901
902    default:
903      datalink_ComeDown(dl, how);
904  }
905}
906
907void
908datalink_StayDown(struct datalink *dl)
909{
910  dl->reconnect_tries = 0;
911}
912
913void
914datalink_DontHangup(struct datalink *dl)
915{
916  if (dl->state >= DATALINK_LCP)
917    dl->stayonline = 1;
918}
919
920int
921datalink_Show(struct cmdargs const *arg)
922{
923  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
924  prompt_Printf(arg->prompt, " State:              %s\n",
925                datalink_State(arg->cx));
926  prompt_Printf(arg->prompt, " CHAP Encryption:    %s\n",
927                arg->cx->chap.using_MSChap ? "MSChap" : "MD5" );
928  prompt_Printf(arg->prompt, " Peer name:          ");
929  if (*arg->cx->peer.authname)
930    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
931  else if (arg->cx->state == DATALINK_OPEN)
932    prompt_Printf(arg->prompt, "None requested\n");
933  else
934    prompt_Printf(arg->prompt, "N/A\n");
935  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
936                mp_Enddisc(arg->cx->peer.enddisc.class,
937                           arg->cx->peer.enddisc.address,
938                           arg->cx->peer.enddisc.len));
939
940  prompt_Printf(arg->prompt, "\nDefaults:\n");
941  prompt_Printf(arg->prompt, " Phone List:         %s\n",
942                arg->cx->cfg.phone.list);
943  if (arg->cx->cfg.dial.max)
944    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
945                  arg->cx->cfg.dial.max);
946  else
947    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
948  if (arg->cx->cfg.dial.next_timeout > 0)
949    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
950  else
951    prompt_Printf(arg->prompt, "random/");
952  if (arg->cx->cfg.dial.timeout > 0)
953    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
954  else
955    prompt_Printf(arg->prompt, "random\n");
956  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
957                arg->cx->cfg.reconnect.max);
958  if (arg->cx->cfg.reconnect.timeout > 0)
959    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
960  else
961    prompt_Printf(arg->prompt, "random\n");
962  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
963                PHYS_DIRECT ?  "accepted: " : "requested:");
964  if (!arg->cx->cfg.callback.opmask)
965    prompt_Printf(arg->prompt, "none\n");
966  else {
967    int comma = 0;
968
969    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
970      prompt_Printf(arg->prompt, "none");
971      comma = 1;
972    }
973    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
974      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
975      comma = 1;
976    }
977    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
978      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
979      if (arg->cx->physical->type != PHYS_DIRECT)
980        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
981      comma = 1;
982    }
983    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
984      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
985      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
986                    arg->cx->cfg.cbcp.delay);
987      prompt_Printf(arg->prompt, "                     phone: ");
988      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
989        if (arg->cx->physical->type & PHYS_DIRECT)
990          prompt_Printf(arg->prompt, "Caller decides\n");
991        else
992          prompt_Printf(arg->prompt, "Dialback server decides\n");
993      } else
994        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
995      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
996                    arg->cx->cfg.cbcp.fsmretry);
997    } else
998      prompt_Printf(arg->prompt, "\n");
999  }
1000
1001  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1002                arg->cx->cfg.script.dial);
1003  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1004                arg->cx->cfg.script.login);
1005  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1006                arg->cx->cfg.script.hangup);
1007  return 0;
1008}
1009
1010int
1011datalink_SetReconnect(struct cmdargs const *arg)
1012{
1013  if (arg->argc == arg->argn+2) {
1014    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1015    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1016    return 0;
1017  }
1018  return -1;
1019}
1020
1021int
1022datalink_SetRedial(struct cmdargs const *arg)
1023{
1024  int timeout;
1025  int tries;
1026  char *dot;
1027
1028  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1029    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1030	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1031      arg->cx->cfg.dial.timeout = -1;
1032      randinit();
1033    } else {
1034      timeout = atoi(arg->argv[arg->argn]);
1035
1036      if (timeout >= 0)
1037	arg->cx->cfg.dial.timeout = timeout;
1038      else {
1039	log_Printf(LogWARN, "Invalid redial timeout\n");
1040	return -1;
1041      }
1042    }
1043
1044    dot = strchr(arg->argv[arg->argn], '.');
1045    if (dot) {
1046      if (strcasecmp(++dot, "random") == 0) {
1047	arg->cx->cfg.dial.next_timeout = -1;
1048	randinit();
1049      } else {
1050	timeout = atoi(dot);
1051	if (timeout >= 0)
1052	  arg->cx->cfg.dial.next_timeout = timeout;
1053	else {
1054	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1055	  return -1;
1056	}
1057      }
1058    } else
1059      /* Default next timeout */
1060      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1061
1062    if (arg->argc == arg->argn+2) {
1063      tries = atoi(arg->argv[arg->argn+1]);
1064
1065      if (tries >= 0) {
1066	arg->cx->cfg.dial.max = tries;
1067      } else {
1068	log_Printf(LogWARN, "Invalid retry value\n");
1069	return 1;
1070      }
1071    }
1072    return 0;
1073  }
1074  return -1;
1075}
1076
1077static const char *states[] = {
1078  "closed",
1079  "opening",
1080  "hangup",
1081  "dial",
1082  "login",
1083  "ready",
1084  "lcp",
1085  "auth",
1086  "cbcp",
1087  "open"
1088};
1089
1090const char *
1091datalink_State(struct datalink *dl)
1092{
1093  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1094    return "unknown";
1095  return states[dl->state];
1096}
1097
1098static void
1099datalink_NewState(struct datalink *dl, int state)
1100{
1101  if (state != dl->state) {
1102    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1103      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1104                 states[state]);
1105      dl->state = state;
1106    } else
1107      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1108  }
1109}
1110
1111struct datalink *
1112iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1113             int fd)
1114{
1115  struct datalink *dl, *cdl;
1116  u_int retry;
1117  char *oname;
1118
1119  dl = (struct datalink *)iov[(*niov)++].iov_base;
1120  dl->name = iov[*niov].iov_base;
1121
1122  if (dl->name[DATALINK_MAXNAME-1]) {
1123    dl->name[DATALINK_MAXNAME-1] = '\0';
1124    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1125      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1126  }
1127
1128  /* Make sure the name is unique ! */
1129  oname = NULL;
1130  do {
1131    for (cdl = bundle->links; cdl; cdl = cdl->next)
1132      if (!strcasecmp(dl->name, cdl->name)) {
1133        if (oname)
1134          free(datalink_NextName(dl));
1135        else
1136          oname = datalink_NextName(dl);
1137        break;	/* Keep renaming 'till we have no conflicts */
1138      }
1139  } while (cdl);
1140
1141  if (oname) {
1142    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1143    free(oname);
1144  } else {
1145    dl->name = strdup(dl->name);
1146    free(iov[*niov].iov_base);
1147  }
1148  (*niov)++;
1149
1150  dl->desc.type = DATALINK_DESCRIPTOR;
1151  dl->desc.UpdateSet = datalink_UpdateSet;
1152  dl->desc.IsSet = datalink_IsSet;
1153  dl->desc.Read = datalink_Read;
1154  dl->desc.Write = datalink_Write;
1155
1156  mp_linkInit(&dl->mp);
1157  *dl->phone.list = '\0';
1158  dl->phone.next = NULL;
1159  dl->phone.alt = NULL;
1160  dl->phone.chosen = "N/A";
1161
1162  dl->bundle = bundle;
1163  dl->next = NULL;
1164  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
1165  dl->dial_tries = 0;
1166  dl->reconnect_tries = 0;
1167  dl->parent = &bundle->fsm;
1168  dl->fsmp.LayerStart = datalink_LayerStart;
1169  dl->fsmp.LayerUp = datalink_LayerUp;
1170  dl->fsmp.LayerDown = datalink_LayerDown;
1171  dl->fsmp.LayerFinish = datalink_LayerFinish;
1172  dl->fsmp.object = dl;
1173
1174  retry = dl->pap.cfg.fsmretry;
1175  auth_Init(&dl->pap);
1176  dl->pap.cfg.fsmretry = retry;
1177
1178  retry = dl->chap.auth.cfg.fsmretry;
1179  auth_Init(&dl->chap.auth);
1180  dl->chap.auth.cfg.fsmretry = retry;
1181
1182  dl->physical = iov2modem(dl, iov, niov, maxiov, fd);
1183
1184  if (!dl->physical) {
1185    free(dl->name);
1186    free(dl);
1187    dl = NULL;
1188  } else {
1189    cbcp_Init(&dl->cbcp, dl->physical);
1190    chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
1191
1192    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1193              dl->name, datalink_State(dl));
1194  }
1195
1196  return dl;
1197}
1198
1199int
1200datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1201             pid_t newpid)
1202{
1203  /* If `dl' is NULL, we're allocating before a Fromiov() */
1204  int link_fd;
1205
1206  if (dl) {
1207    timer_Stop(&dl->dial_timer);
1208    /* The following is purely for the sake of paranoia */
1209    cbcp_Down(&dl->cbcp);
1210    timer_Stop(&dl->pap.authtimer);
1211    timer_Stop(&dl->chap.auth.authtimer);
1212  }
1213
1214  if (*niov >= maxiov - 1) {
1215    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1216    if (dl) {
1217      free(dl->name);
1218      free(dl);
1219    }
1220    return -1;
1221  }
1222
1223  iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl);
1224  iov[(*niov)++].iov_len = sizeof *dl;
1225  iov[*niov].iov_base =
1226    dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME);
1227  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1228
1229  link_fd = modem2iov(dl ? dl->physical : NULL, iov, niov, maxiov, newpid);
1230
1231  if (link_fd == -1 && dl) {
1232    free(dl->name);
1233    free(dl);
1234  }
1235
1236  return link_fd;
1237}
1238
1239void
1240datalink_Rename(struct datalink *dl, const char *name)
1241{
1242  free(dl->name);
1243  dl->physical->link.name = dl->name = strdup(name);
1244}
1245
1246char *
1247datalink_NextName(struct datalink *dl)
1248{
1249  int f, n;
1250  char *name, *oname;
1251
1252  n = strlen(dl->name);
1253  name = (char *)malloc(n+3);
1254  for (f = n - 1; f >= 0; f--)
1255    if (!isdigit(dl->name[f]))
1256      break;
1257  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1258  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1259  oname = dl->name;
1260  dl->name = name;
1261  /* our physical link name isn't updated (it probably isn't created yet) */
1262  return oname;
1263}
1264
1265int
1266datalink_SetMode(struct datalink *dl, int mode)
1267{
1268  if (!physical_SetMode(dl->physical, mode))
1269    return 0;
1270  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1271    dl->script.run = 0;
1272  if (dl->physical->type == PHYS_DIRECT)
1273    dl->reconnect_tries = 0;
1274  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND) && dl->state <= DATALINK_READY)
1275    datalink_Up(dl, 1, 1);
1276  return 1;
1277}
1278