datalink.c revision 43313 
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 1.25 1999/01/20 18:06:52 brian Exp $
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 "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#ifndef NORADIUS
62#include "radius.h"
63#endif
64#include "bundle.h"
65#include "chat.h"
66#include "auth.h"
67#include "modem.h"
68#include "prompt.h"
69#include "lcpproto.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 void
90datalink_StartDialTimer(struct datalink *dl, int Timeout)
91{
92  timer_Stop(&dl->dial_timer);
93
94  if (Timeout) {
95    if (Timeout > 0)
96      dl->dial_timer.load = Timeout * SECTICKS;
97    else
98      dl->dial_timer.load = (random() % DIAL_TIMEOUT) * SECTICKS;
99    dl->dial_timer.func = datalink_OpenTimeout;
100    dl->dial_timer.name = "dial";
101    dl->dial_timer.arg = dl;
102    timer_Start(&dl->dial_timer);
103    if (dl->state == DATALINK_OPENING)
104      log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
105                dl->name, Timeout);
106  }
107}
108
109static void
110datalink_HangupDone(struct datalink *dl)
111{
112  if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
113      physical_GetFD(dl->physical) != -1) {
114    /* Don't close our modem if the link is dedicated */
115    datalink_LoginDone(dl);
116    return;
117  }
118
119  modem_Close(dl->physical);
120  dl->phone.chosen = "N/A";
121
122  if (dl->cbcp.required) {
123    log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
124    dl->cfg.callback.opmask = 0;
125    strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
126            sizeof dl->cfg.phone.list - 1);
127    dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
128    dl->phone.alt = dl->phone.next = NULL;
129    dl->reconnect_tries = dl->cfg.reconnect.max;
130    dl->dial_tries = dl->cfg.dial.max;
131    dl->script.run = 1;
132    dl->script.packetmode = 1;
133    if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
134      log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
135    bundle_LinksRemoved(dl->bundle);
136    if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
137      dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
138    datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
139    cbcp_Down(&dl->cbcp);
140    datalink_NewState(dl, DATALINK_OPENING);
141  } else if (dl->bundle->CleaningUp ||
142      (dl->physical->type == PHYS_DIRECT) ||
143      ((!dl->dial_tries || (dl->dial_tries < 0 && !dl->reconnect_tries)) &&
144       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
145    datalink_NewState(dl, DATALINK_CLOSED);
146    dl->dial_tries = -1;
147    dl->reconnect_tries = 0;
148    bundle_LinkClosed(dl->bundle, dl);
149    if (!dl->bundle->CleaningUp)
150      datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
151  } else {
152    datalink_NewState(dl, DATALINK_OPENING);
153    if (dl->dial_tries < 0) {
154      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
155      dl->dial_tries = dl->cfg.dial.max;
156      dl->reconnect_tries--;
157    } else {
158      if (dl->phone.next == NULL)
159        datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
160      else
161        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
162    }
163  }
164}
165
166static const char *
167datalink_ChoosePhoneNumber(struct datalink *dl)
168{
169  char *phone;
170
171  if (dl->phone.alt == NULL) {
172    if (dl->phone.next == NULL) {
173      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
174      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
175      dl->phone.next = dl->phone.list;
176    }
177    dl->phone.alt = strsep(&dl->phone.next, ":");
178  }
179  phone = strsep(&dl->phone.alt, "|");
180  dl->phone.chosen = *phone ? phone : "[NONE]";
181  if (*phone)
182    log_Printf(LogPHASE, "Phone: %s\n", phone);
183  return phone;
184}
185
186static void
187datalink_LoginDone(struct datalink *dl)
188{
189  if (!dl->script.packetmode) {
190    dl->dial_tries = -1;
191    datalink_NewState(dl, DATALINK_READY);
192  } else if (modem_Raw(dl->physical, dl->bundle) < 0) {
193    dl->dial_tries = 0;
194    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
195    if (dl->script.run) {
196      datalink_NewState(dl, DATALINK_HANGUP);
197      modem_Offline(dl->physical);
198      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
199    } else {
200      timer_Stop(&dl->physical->Timer);
201      if (dl->physical->type == PHYS_DEDICATED)
202        /* force a redial timeout */
203        modem_Close(dl->physical);
204      datalink_HangupDone(dl);
205    }
206  } else {
207    dl->dial_tries = -1;
208
209    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
210    async_Init(&dl->physical->async);
211
212    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
213              0 : dl->physical->link.lcp.cfg.openmode);
214    ccp_Setup(&dl->physical->link.ccp);
215
216    datalink_NewState(dl, DATALINK_LCP);
217    fsm_Up(&dl->physical->link.lcp.fsm);
218    fsm_Open(&dl->physical->link.lcp.fsm);
219  }
220}
221
222static int
223datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
224                   int *n)
225{
226  struct datalink *dl = descriptor2datalink(d);
227  int result;
228
229  result = 0;
230  switch (dl->state) {
231    case DATALINK_CLOSED:
232      if ((dl->physical->type &
233           (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|PHYS_DDIAL)) &&
234          !bundle_IsDead(dl->bundle))
235        /*
236         * Our first time in - DEDICATED & DDIAL never come down, and
237         * DIRECT & BACKGROUND get deleted when they enter DATALINK_CLOSED.
238         * Go to DATALINK_OPENING via datalink_Up() and fall through.
239         */
240        datalink_Up(dl, 1, 1);
241      else
242        break;
243      /* fall through */
244
245    case DATALINK_OPENING:
246      if (dl->dial_timer.state != TIMER_RUNNING) {
247        if (--dl->dial_tries < 0)
248          dl->dial_tries = 0;
249        if (modem_Open(dl->physical, dl->bundle) >= 0) {
250          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
251                           "Type `~?' for help\r\n", dl->name,
252                           dl->physical->name.full);
253          if (dl->script.run) {
254            datalink_NewState(dl, DATALINK_DIAL);
255            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial, 1,
256                      datalink_ChoosePhoneNumber(dl));
257            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
258                dl->cfg.dial.max)
259              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
260                        dl->name, dl->cfg.dial.max - dl->dial_tries,
261                        dl->cfg.dial.max);
262          } else
263            datalink_LoginDone(dl);
264          return datalink_UpdateSet(d, r, w, e, n);
265        } else {
266          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
267              dl->cfg.dial.max)
268            log_Printf(LogCHAT, "Failed to open modem (attempt %u of %d)\n",
269                       dl->cfg.dial.max - dl->dial_tries, dl->cfg.dial.max);
270          else
271            log_Printf(LogCHAT, "Failed to open modem\n");
272
273          if (dl->bundle->CleaningUp ||
274              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
275               dl->cfg.dial.max && dl->dial_tries == 0)) {
276            datalink_NewState(dl, DATALINK_CLOSED);
277            dl->reconnect_tries = 0;
278            dl->dial_tries = -1;
279            log_WritePrompts(dl, "Failed to open %s\n",
280                             dl->physical->name.full);
281            bundle_LinkClosed(dl->bundle, dl);
282          }
283          if (!dl->bundle->CleaningUp) {
284            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
285                             dl->physical->name.full, dl->cfg.dial.timeout);
286            datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
287          }
288        }
289      }
290      break;
291
292    case DATALINK_HANGUP:
293    case DATALINK_DIAL:
294    case DATALINK_LOGIN:
295      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
296      switch (dl->chat.state) {
297        case CHAT_DONE:
298          /* script succeeded */
299          chat_Destroy(&dl->chat);
300          switch(dl->state) {
301            case DATALINK_HANGUP:
302              datalink_HangupDone(dl);
303              break;
304            case DATALINK_DIAL:
305              datalink_NewState(dl, DATALINK_LOGIN);
306              chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, 0, NULL);
307              return datalink_UpdateSet(d, r, w, e, n);
308            case DATALINK_LOGIN:
309              dl->phone.alt = NULL;
310              datalink_LoginDone(dl);
311              return datalink_UpdateSet(d, r, w, e, n);
312          }
313          break;
314        case CHAT_FAILED:
315          /* Going down - script failed */
316          log_Printf(LogWARN, "Chat script failed\n");
317          chat_Destroy(&dl->chat);
318          switch(dl->state) {
319            case DATALINK_HANGUP:
320              datalink_HangupDone(dl);
321              break;
322            case DATALINK_DIAL:
323            case DATALINK_LOGIN:
324              datalink_NewState(dl, DATALINK_HANGUP);
325              modem_Offline(dl->physical);	/* Is this required ? */
326              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
327              return datalink_UpdateSet(d, r, w, e, n);
328          }
329          break;
330      }
331      break;
332
333    case DATALINK_READY:
334    case DATALINK_LCP:
335    case DATALINK_AUTH:
336    case DATALINK_CBCP:
337    case DATALINK_OPEN:
338      result = descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
339      break;
340  }
341  return result;
342}
343
344int
345datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
346{
347  return physical_RemoveFromSet(dl->physical, r, w, e);
348}
349
350static int
351datalink_IsSet(struct descriptor *d, const fd_set *fdset)
352{
353  struct datalink *dl = descriptor2datalink(d);
354
355  switch (dl->state) {
356    case DATALINK_CLOSED:
357    case DATALINK_OPENING:
358      break;
359
360    case DATALINK_HANGUP:
361    case DATALINK_DIAL:
362    case DATALINK_LOGIN:
363      return descriptor_IsSet(&dl->chat.desc, fdset);
364
365    case DATALINK_READY:
366    case DATALINK_LCP:
367    case DATALINK_AUTH:
368    case DATALINK_CBCP:
369    case DATALINK_OPEN:
370      return descriptor_IsSet(&dl->physical->desc, fdset);
371  }
372  return 0;
373}
374
375static void
376datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
377{
378  struct datalink *dl = descriptor2datalink(d);
379
380  switch (dl->state) {
381    case DATALINK_CLOSED:
382    case DATALINK_OPENING:
383      break;
384
385    case DATALINK_HANGUP:
386    case DATALINK_DIAL:
387    case DATALINK_LOGIN:
388      descriptor_Read(&dl->chat.desc, bundle, fdset);
389      break;
390
391    case DATALINK_READY:
392    case DATALINK_LCP:
393    case DATALINK_AUTH:
394    case DATALINK_CBCP:
395    case DATALINK_OPEN:
396      descriptor_Read(&dl->physical->desc, bundle, fdset);
397      break;
398  }
399}
400
401static int
402datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
403{
404  struct datalink *dl = descriptor2datalink(d);
405  int result = 0;
406
407  switch (dl->state) {
408    case DATALINK_CLOSED:
409    case DATALINK_OPENING:
410      break;
411
412    case DATALINK_HANGUP:
413    case DATALINK_DIAL:
414    case DATALINK_LOGIN:
415      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
416      break;
417
418    case DATALINK_READY:
419    case DATALINK_LCP:
420    case DATALINK_AUTH:
421    case DATALINK_CBCP:
422    case DATALINK_OPEN:
423      result = descriptor_Write(&dl->physical->desc, bundle, fdset);
424      break;
425  }
426
427  return result;
428}
429
430static void
431datalink_ComeDown(struct datalink *dl, int how)
432{
433  if (how != CLOSE_NORMAL) {
434    dl->dial_tries = -1;
435    dl->reconnect_tries = 0;
436    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
437      dl->stayonline = 1;
438  }
439
440  if (dl->state >= DATALINK_READY && dl->stayonline) {
441    dl->stayonline = 0;
442    timer_Stop(&dl->physical->Timer);
443    datalink_NewState(dl, DATALINK_READY);
444  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
445    modem_Offline(dl->physical);
446    chat_Destroy(&dl->chat);
447    if (dl->script.run && dl->state != DATALINK_OPENING) {
448      datalink_NewState(dl, DATALINK_HANGUP);
449      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
450    } else
451      datalink_HangupDone(dl);
452  }
453}
454
455static void
456datalink_LayerStart(void *v, struct fsm *fp)
457{
458  /* The given FSM is about to start up ! */
459  struct datalink *dl = (struct datalink *)v;
460
461  if (fp->proto == PROTO_LCP)
462    (*dl->parent->LayerStart)(dl->parent->object, fp);
463}
464
465static void
466datalink_LayerUp(void *v, struct fsm *fp)
467{
468  /* The given fsm is now up */
469  struct datalink *dl = (struct datalink *)v;
470
471  if (fp->proto == PROTO_LCP) {
472    datalink_GotAuthname(dl, "", 0);
473    dl->physical->link.lcp.auth_ineed = dl->physical->link.lcp.want_auth;
474    dl->physical->link.lcp.auth_iwait = dl->physical->link.lcp.his_auth;
475    if (dl->physical->link.lcp.his_auth || dl->physical->link.lcp.want_auth) {
476      if (bundle_Phase(dl->bundle) == PHASE_ESTABLISH)
477        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
478      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
479                Auth2Nam(dl->physical->link.lcp.his_auth),
480                Auth2Nam(dl->physical->link.lcp.want_auth));
481      if (dl->physical->link.lcp.his_auth == PROTO_PAP)
482        auth_StartChallenge(&dl->pap, dl->physical, pap_SendChallenge);
483      if (dl->physical->link.lcp.want_auth == PROTO_CHAP)
484        auth_StartChallenge(&dl->chap.auth, dl->physical, chap_SendChallenge);
485    } else
486      datalink_AuthOk(dl);
487  }
488}
489
490void
491datalink_GotAuthname(struct datalink *dl, const char *name, int len)
492{
493  if (len >= sizeof dl->peer.authname)
494    len = sizeof dl->peer.authname - 1;
495  strncpy(dl->peer.authname, name, len);
496  dl->peer.authname[len] = '\0';
497}
498
499void
500datalink_NCPUp(struct datalink *dl)
501{
502  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
503
504  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
505    /* we've authenticated in multilink mode ! */
506    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
507      case MP_LINKSENT:
508        /* We've handed the link off to another ppp (well, we will soon) ! */
509        return;
510      case MP_UP:
511        /* First link in the bundle */
512        auth_Select(dl->bundle, dl->peer.authname);
513        /* fall through */
514      case MP_ADDED:
515        /* We're in multilink mode ! */
516        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
517        break;
518      case MP_FAILED:
519        datalink_AuthNotOk(dl);
520        return;
521    }
522  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
523    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
524    datalink_NewState(dl, DATALINK_OPEN);
525    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
526    return;
527  } else {
528    dl->bundle->ncp.mp.peer = dl->peer;
529    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
530    auth_Select(dl->bundle, dl->peer.authname);
531  }
532
533  if (ccpok) {
534    fsm_Up(&dl->physical->link.ccp.fsm);
535    fsm_Open(&dl->physical->link.ccp.fsm);
536  }
537  datalink_NewState(dl, DATALINK_OPEN);
538  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
539  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
540}
541
542void
543datalink_CBCPComplete(struct datalink *dl)
544{
545  datalink_NewState(dl, DATALINK_LCP);
546  fsm_Close(&dl->physical->link.lcp.fsm);
547}
548
549void
550datalink_CBCPFailed(struct datalink *dl)
551{
552  cbcp_Down(&dl->cbcp);
553  datalink_CBCPComplete(dl);
554}
555
556void
557datalink_AuthOk(struct datalink *dl)
558{
559  if ((dl->physical->link.lcp.his_callback.opmask &
560       CALLBACK_BIT(CALLBACK_CBCP) ||
561       dl->physical->link.lcp.want_callback.opmask &
562       CALLBACK_BIT(CALLBACK_CBCP)) &&
563      !(dl->physical->link.lcp.want_callback.opmask &
564        CALLBACK_BIT(CALLBACK_AUTH))) {
565    /* We must have agreed CBCP if AUTH isn't there any more */
566    datalink_NewState(dl, DATALINK_CBCP);
567    cbcp_Up(&dl->cbcp);
568  } else if (dl->physical->link.lcp.want_callback.opmask) {
569    /* It's not CBCP */
570    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
571    datalink_NewState(dl, DATALINK_LCP);
572    fsm_Close(&dl->physical->link.lcp.fsm);
573  } else
574    switch (dl->physical->link.lcp.his_callback.opmask) {
575      case 0:
576        datalink_NCPUp(dl);
577        break;
578
579      case CALLBACK_BIT(CALLBACK_AUTH):
580        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
581                          sizeof dl->cbcp.fsm.phone);
582        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
583          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
584                     dl->peer.authname);
585          *dl->cbcp.fsm.phone = '\0';
586        } else {
587          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
588          if (ptr)
589            *ptr = '\0';	/* Call back on the first number */
590          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
591                     dl->cbcp.fsm.phone);
592          dl->cbcp.required = 1;
593        }
594        dl->cbcp.fsm.delay = 0;
595        datalink_NewState(dl, DATALINK_LCP);
596        fsm_Close(&dl->physical->link.lcp.fsm);
597        break;
598
599      case CALLBACK_BIT(CALLBACK_E164):
600        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
601                sizeof dl->cbcp.fsm.phone - 1);
602        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
603        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
604                   dl->cbcp.fsm.phone);
605        dl->cbcp.required = 1;
606        dl->cbcp.fsm.delay = 0;
607        datalink_NewState(dl, DATALINK_LCP);
608        fsm_Close(&dl->physical->link.lcp.fsm);
609        break;
610
611      default:
612        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
613                   dl->name);
614        datalink_NewState(dl, DATALINK_LCP);
615        fsm_Close(&dl->physical->link.lcp.fsm);
616        break;
617    }
618}
619
620void
621datalink_AuthNotOk(struct datalink *dl)
622{
623  datalink_NewState(dl, DATALINK_LCP);
624  fsm_Close(&dl->physical->link.lcp.fsm);
625}
626
627static void
628datalink_LayerDown(void *v, struct fsm *fp)
629{
630  /* The given FSM has been told to come down */
631  struct datalink *dl = (struct datalink *)v;
632
633  if (fp->proto == PROTO_LCP) {
634    switch (dl->state) {
635      case DATALINK_OPEN:
636        peerid_Init(&dl->peer);
637        fsm2initial(&dl->physical->link.ccp.fsm);
638        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
639        (*dl->parent->LayerDown)(dl->parent->object, fp);
640        /* fall through (just in case) */
641
642      case DATALINK_CBCP:
643        if (!dl->cbcp.required)
644          cbcp_Down(&dl->cbcp);
645        /* fall through (just in case) */
646
647      case DATALINK_AUTH:
648        timer_Stop(&dl->pap.authtimer);
649        timer_Stop(&dl->chap.auth.authtimer);
650    }
651    datalink_NewState(dl, DATALINK_LCP);
652  }
653}
654
655static void
656datalink_LayerFinish(void *v, struct fsm *fp)
657{
658  /* The given fsm is now down */
659  struct datalink *dl = (struct datalink *)v;
660
661  if (fp->proto == PROTO_LCP) {
662    fsm2initial(fp);
663    (*dl->parent->LayerFinish)(dl->parent->object, fp);
664    datalink_ComeDown(dl, CLOSE_NORMAL);
665  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
666    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
667}
668
669struct datalink *
670datalink_Create(const char *name, struct bundle *bundle, int type)
671{
672  struct datalink *dl;
673
674  dl = (struct datalink *)malloc(sizeof(struct datalink));
675  if (dl == NULL)
676    return dl;
677
678  dl->desc.type = DATALINK_DESCRIPTOR;
679  dl->desc.UpdateSet = datalink_UpdateSet;
680  dl->desc.IsSet = datalink_IsSet;
681  dl->desc.Read = datalink_Read;
682  dl->desc.Write = datalink_Write;
683
684  dl->state = DATALINK_CLOSED;
685
686  *dl->cfg.script.dial = '\0';
687  *dl->cfg.script.login = '\0';
688  *dl->cfg.script.hangup = '\0';
689  *dl->cfg.phone.list = '\0';
690  *dl->phone.list = '\0';
691  dl->phone.next = NULL;
692  dl->phone.alt = NULL;
693  dl->phone.chosen = "N/A";
694  dl->stayonline = 0;
695  dl->script.run = 1;
696  dl->script.packetmode = 1;
697  mp_linkInit(&dl->mp);
698
699  dl->bundle = bundle;
700  dl->next = NULL;
701
702  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
703
704  dl->dial_tries = 0;
705  dl->cfg.dial.max = 1;
706  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
707  dl->cfg.dial.timeout = DIAL_TIMEOUT;
708
709  dl->reconnect_tries = 0;
710  dl->cfg.reconnect.max = 0;
711  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
712
713  dl->cfg.callback.opmask = 0;
714  dl->cfg.cbcp.delay = 0;
715  *dl->cfg.cbcp.phone = '\0';
716  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
717
718  dl->name = strdup(name);
719  peerid_Init(&dl->peer);
720  dl->parent = &bundle->fsm;
721  dl->fsmp.LayerStart = datalink_LayerStart;
722  dl->fsmp.LayerUp = datalink_LayerUp;
723  dl->fsmp.LayerDown = datalink_LayerDown;
724  dl->fsmp.LayerFinish = datalink_LayerFinish;
725  dl->fsmp.object = dl;
726
727  auth_Init(&dl->pap);
728  auth_Init(&dl->chap.auth);
729
730  if ((dl->physical = modem_Create(dl, type)) == NULL) {
731    free(dl->name);
732    free(dl);
733    return NULL;
734  }
735  cbcp_Init(&dl->cbcp, dl->physical);
736  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
737
738  log_Printf(LogPHASE, "%s: Created in %s state\n",
739             dl->name, datalink_State(dl));
740
741  return dl;
742}
743
744struct datalink *
745datalink_Clone(struct datalink *odl, const char *name)
746{
747  struct datalink *dl;
748
749  dl = (struct datalink *)malloc(sizeof(struct datalink));
750  if (dl == NULL)
751    return dl;
752
753  dl->desc.type = DATALINK_DESCRIPTOR;
754  dl->desc.UpdateSet = datalink_UpdateSet;
755  dl->desc.IsSet = datalink_IsSet;
756  dl->desc.Read = datalink_Read;
757  dl->desc.Write = datalink_Write;
758
759  dl->state = DATALINK_CLOSED;
760
761  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
762  mp_linkInit(&dl->mp);
763  *dl->phone.list = '\0';
764  dl->phone.next = NULL;
765  dl->phone.alt = NULL;
766  dl->phone.chosen = "N/A";
767  dl->bundle = odl->bundle;
768  dl->next = NULL;
769  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
770  dl->dial_tries = 0;
771  dl->reconnect_tries = 0;
772  dl->name = strdup(name);
773  peerid_Init(&dl->peer);
774  dl->parent = odl->parent;
775  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
776  dl->fsmp.object = dl;
777  auth_Init(&dl->pap);
778  dl->pap.cfg.fsmretry = odl->pap.cfg.fsmretry;
779
780  auth_Init(&dl->chap.auth);
781  dl->chap.auth.cfg.fsmretry = odl->chap.auth.cfg.fsmretry;
782
783  if ((dl->physical = modem_Create(dl, PHYS_INTERACTIVE)) == NULL) {
784    free(dl->name);
785    free(dl);
786    return NULL;
787  }
788  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
789  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
790         sizeof dl->physical->link.lcp.cfg);
791  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
792         sizeof dl->physical->link.ccp.cfg);
793  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
794         sizeof dl->physical->async.cfg);
795
796  cbcp_Init(&dl->cbcp, dl->physical);
797  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
798
799  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
800             dl->name, datalink_State(dl));
801
802  return dl;
803}
804
805struct datalink *
806datalink_Destroy(struct datalink *dl)
807{
808  struct datalink *result;
809
810  if (dl->state != DATALINK_CLOSED) {
811    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
812              datalink_State(dl));
813    switch (dl->state) {
814      case DATALINK_HANGUP:
815      case DATALINK_DIAL:
816      case DATALINK_LOGIN:
817        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
818        break;
819    }
820  }
821
822  timer_Stop(&dl->dial_timer);
823  result = dl->next;
824  modem_Destroy(dl->physical);
825  free(dl->name);
826  free(dl);
827
828  return result;
829}
830
831void
832datalink_Up(struct datalink *dl, int runscripts, int packetmode)
833{
834  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
835    /* Ignore scripts */
836    runscripts = 0;
837
838  switch (dl->state) {
839    case DATALINK_CLOSED:
840      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
841          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
842        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
843      datalink_NewState(dl, DATALINK_OPENING);
844      dl->reconnect_tries =
845        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
846      dl->dial_tries = dl->cfg.dial.max;
847      dl->script.run = runscripts;
848      dl->script.packetmode = packetmode;
849      break;
850
851    case DATALINK_OPENING:
852      if (!dl->script.run && runscripts)
853        dl->script.run = 1;
854      /* fall through */
855
856    case DATALINK_DIAL:
857    case DATALINK_LOGIN:
858    case DATALINK_READY:
859      if (!dl->script.packetmode && packetmode) {
860        dl->script.packetmode = 1;
861        if (dl->state == DATALINK_READY)
862          datalink_LoginDone(dl);
863      }
864      break;
865  }
866}
867
868void
869datalink_Close(struct datalink *dl, int how)
870{
871  /* Please close */
872  switch (dl->state) {
873    case DATALINK_OPEN:
874      peerid_Init(&dl->peer);
875      fsm2initial(&dl->physical->link.ccp.fsm);
876      /* fall through */
877
878    case DATALINK_CBCP:
879    case DATALINK_AUTH:
880    case DATALINK_LCP:
881      fsm_Close(&dl->physical->link.lcp.fsm);
882      if (how != CLOSE_NORMAL) {
883        dl->dial_tries = -1;
884        dl->reconnect_tries = 0;
885        if (how == CLOSE_LCP)
886          dl->stayonline = 1;
887      }
888      break;
889
890    default:
891      datalink_ComeDown(dl, how);
892  }
893}
894
895void
896datalink_Down(struct datalink *dl, int how)
897{
898  /* Carrier is lost */
899  switch (dl->state) {
900    case DATALINK_OPEN:
901      peerid_Init(&dl->peer);
902      fsm2initial(&dl->physical->link.ccp.fsm);
903      /* fall through */
904
905    case DATALINK_CBCP:
906    case DATALINK_AUTH:
907    case DATALINK_LCP:
908      fsm2initial(&dl->physical->link.lcp.fsm);
909      /* fall through */
910
911    default:
912      datalink_ComeDown(dl, how);
913  }
914}
915
916void
917datalink_StayDown(struct datalink *dl)
918{
919  dl->reconnect_tries = 0;
920}
921
922void
923datalink_DontHangup(struct datalink *dl)
924{
925  if (dl->state >= DATALINK_LCP)
926    dl->stayonline = 1;
927}
928
929int
930datalink_Show(struct cmdargs const *arg)
931{
932  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
933  prompt_Printf(arg->prompt, " State:              %s\n",
934                datalink_State(arg->cx));
935  prompt_Printf(arg->prompt, " CHAP Encryption:    %s\n",
936                arg->cx->chap.using_MSChap ? "MSChap" : "MD5" );
937  prompt_Printf(arg->prompt, " Peer name:          ");
938  if (*arg->cx->peer.authname)
939    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
940  else if (arg->cx->state == DATALINK_OPEN)
941    prompt_Printf(arg->prompt, "None requested\n");
942  else
943    prompt_Printf(arg->prompt, "N/A\n");
944  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
945                mp_Enddisc(arg->cx->peer.enddisc.class,
946                           arg->cx->peer.enddisc.address,
947                           arg->cx->peer.enddisc.len));
948
949  prompt_Printf(arg->prompt, "\nDefaults:\n");
950  prompt_Printf(arg->prompt, " Phone List:         %s\n",
951                arg->cx->cfg.phone.list);
952  if (arg->cx->cfg.dial.max)
953    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
954                  arg->cx->cfg.dial.max);
955  else
956    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
957  if (arg->cx->cfg.dial.next_timeout > 0)
958    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
959  else
960    prompt_Printf(arg->prompt, "random/");
961  if (arg->cx->cfg.dial.timeout > 0)
962    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
963  else
964    prompt_Printf(arg->prompt, "random\n");
965  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
966                arg->cx->cfg.reconnect.max);
967  if (arg->cx->cfg.reconnect.timeout > 0)
968    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
969  else
970    prompt_Printf(arg->prompt, "random\n");
971  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
972                PHYS_DIRECT ?  "accepted: " : "requested:");
973  if (!arg->cx->cfg.callback.opmask)
974    prompt_Printf(arg->prompt, "none\n");
975  else {
976    int comma = 0;
977
978    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
979      prompt_Printf(arg->prompt, "none");
980      comma = 1;
981    }
982    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
983      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
984      comma = 1;
985    }
986    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
987      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
988      if (arg->cx->physical->type != PHYS_DIRECT)
989        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
990      comma = 1;
991    }
992    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
993      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
994      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
995                    arg->cx->cfg.cbcp.delay);
996      prompt_Printf(arg->prompt, "                     phone: ");
997      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
998        if (arg->cx->physical->type & PHYS_DIRECT)
999          prompt_Printf(arg->prompt, "Caller decides\n");
1000        else
1001          prompt_Printf(arg->prompt, "Dialback server decides\n");
1002      } else
1003        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1004      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1005                    arg->cx->cfg.cbcp.fsmretry);
1006    } else
1007      prompt_Printf(arg->prompt, "\n");
1008  }
1009
1010  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1011                arg->cx->cfg.script.dial);
1012  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1013                arg->cx->cfg.script.login);
1014  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1015                arg->cx->cfg.script.hangup);
1016  return 0;
1017}
1018
1019int
1020datalink_SetReconnect(struct cmdargs const *arg)
1021{
1022  if (arg->argc == arg->argn+2) {
1023    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1024    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1025    return 0;
1026  }
1027  return -1;
1028}
1029
1030int
1031datalink_SetRedial(struct cmdargs const *arg)
1032{
1033  int timeout;
1034  int tries;
1035  char *dot;
1036
1037  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1038    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1039	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1040      arg->cx->cfg.dial.timeout = -1;
1041      randinit();
1042    } else {
1043      timeout = atoi(arg->argv[arg->argn]);
1044
1045      if (timeout >= 0)
1046	arg->cx->cfg.dial.timeout = timeout;
1047      else {
1048	log_Printf(LogWARN, "Invalid redial timeout\n");
1049	return -1;
1050      }
1051    }
1052
1053    dot = strchr(arg->argv[arg->argn], '.');
1054    if (dot) {
1055      if (strcasecmp(++dot, "random") == 0) {
1056	arg->cx->cfg.dial.next_timeout = -1;
1057	randinit();
1058      } else {
1059	timeout = atoi(dot);
1060	if (timeout >= 0)
1061	  arg->cx->cfg.dial.next_timeout = timeout;
1062	else {
1063	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1064	  return -1;
1065	}
1066      }
1067    } else
1068      /* Default next timeout */
1069      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1070
1071    if (arg->argc == arg->argn+2) {
1072      tries = atoi(arg->argv[arg->argn+1]);
1073
1074      if (tries >= 0) {
1075	arg->cx->cfg.dial.max = tries;
1076      } else {
1077	log_Printf(LogWARN, "Invalid retry value\n");
1078	return 1;
1079      }
1080    }
1081    return 0;
1082  }
1083  return -1;
1084}
1085
1086static const char *states[] = {
1087  "closed",
1088  "opening",
1089  "hangup",
1090  "dial",
1091  "login",
1092  "ready",
1093  "lcp",
1094  "auth",
1095  "cbcp",
1096  "open"
1097};
1098
1099const char *
1100datalink_State(struct datalink *dl)
1101{
1102  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1103    return "unknown";
1104  return states[dl->state];
1105}
1106
1107static void
1108datalink_NewState(struct datalink *dl, int state)
1109{
1110  if (state != dl->state) {
1111    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1112      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1113                 states[state]);
1114      dl->state = state;
1115    } else
1116      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1117  }
1118}
1119
1120struct datalink *
1121iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1122             int fd)
1123{
1124  struct datalink *dl, *cdl;
1125  u_int retry;
1126  char *oname;
1127
1128  dl = (struct datalink *)iov[(*niov)++].iov_base;
1129  dl->name = iov[*niov].iov_base;
1130
1131  if (dl->name[DATALINK_MAXNAME-1]) {
1132    dl->name[DATALINK_MAXNAME-1] = '\0';
1133    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1134      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1135  }
1136
1137  /* Make sure the name is unique ! */
1138  oname = NULL;
1139  do {
1140    for (cdl = bundle->links; cdl; cdl = cdl->next)
1141      if (!strcasecmp(dl->name, cdl->name)) {
1142        if (oname)
1143          free(datalink_NextName(dl));
1144        else
1145          oname = datalink_NextName(dl);
1146        break;	/* Keep renaming 'till we have no conflicts */
1147      }
1148  } while (cdl);
1149
1150  if (oname) {
1151    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1152    free(oname);
1153  } else {
1154    dl->name = strdup(dl->name);
1155    free(iov[*niov].iov_base);
1156  }
1157  (*niov)++;
1158
1159  dl->desc.type = DATALINK_DESCRIPTOR;
1160  dl->desc.UpdateSet = datalink_UpdateSet;
1161  dl->desc.IsSet = datalink_IsSet;
1162  dl->desc.Read = datalink_Read;
1163  dl->desc.Write = datalink_Write;
1164
1165  mp_linkInit(&dl->mp);
1166  *dl->phone.list = '\0';
1167  dl->phone.next = NULL;
1168  dl->phone.alt = NULL;
1169  dl->phone.chosen = "N/A";
1170
1171  dl->bundle = bundle;
1172  dl->next = NULL;
1173  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
1174  dl->dial_tries = 0;
1175  dl->reconnect_tries = 0;
1176  dl->parent = &bundle->fsm;
1177  dl->fsmp.LayerStart = datalink_LayerStart;
1178  dl->fsmp.LayerUp = datalink_LayerUp;
1179  dl->fsmp.LayerDown = datalink_LayerDown;
1180  dl->fsmp.LayerFinish = datalink_LayerFinish;
1181  dl->fsmp.object = dl;
1182
1183  retry = dl->pap.cfg.fsmretry;
1184  auth_Init(&dl->pap);
1185  dl->pap.cfg.fsmretry = retry;
1186
1187  retry = dl->chap.auth.cfg.fsmretry;
1188  auth_Init(&dl->chap.auth);
1189  dl->chap.auth.cfg.fsmretry = retry;
1190
1191  dl->physical = iov2modem(dl, iov, niov, maxiov, fd);
1192
1193  if (!dl->physical) {
1194    free(dl->name);
1195    free(dl);
1196    dl = NULL;
1197  } else {
1198    cbcp_Init(&dl->cbcp, dl->physical);
1199    chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
1200
1201    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1202              dl->name, datalink_State(dl));
1203  }
1204
1205  return dl;
1206}
1207
1208int
1209datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1210             pid_t newpid)
1211{
1212  /* If `dl' is NULL, we're allocating before a Fromiov() */
1213  int link_fd;
1214
1215  if (dl) {
1216    timer_Stop(&dl->dial_timer);
1217    /* The following is purely for the sake of paranoia */
1218    cbcp_Down(&dl->cbcp);
1219    timer_Stop(&dl->pap.authtimer);
1220    timer_Stop(&dl->chap.auth.authtimer);
1221  }
1222
1223  if (*niov >= maxiov - 1) {
1224    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1225    if (dl) {
1226      free(dl->name);
1227      free(dl);
1228    }
1229    return -1;
1230  }
1231
1232  iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl);
1233  iov[(*niov)++].iov_len = sizeof *dl;
1234  iov[*niov].iov_base =
1235    dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME);
1236  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1237
1238  link_fd = modem2iov(dl ? dl->physical : NULL, iov, niov, maxiov, newpid);
1239
1240  if (link_fd == -1 && dl) {
1241    free(dl->name);
1242    free(dl);
1243  }
1244
1245  return link_fd;
1246}
1247
1248void
1249datalink_Rename(struct datalink *dl, const char *name)
1250{
1251  free(dl->name);
1252  dl->physical->link.name = dl->name = strdup(name);
1253}
1254
1255char *
1256datalink_NextName(struct datalink *dl)
1257{
1258  int f, n;
1259  char *name, *oname;
1260
1261  n = strlen(dl->name);
1262  name = (char *)malloc(n+3);
1263  for (f = n - 1; f >= 0; f--)
1264    if (!isdigit(dl->name[f]))
1265      break;
1266  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1267  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1268  oname = dl->name;
1269  dl->name = name;
1270  /* our physical link name isn't updated (it probably isn't created yet) */
1271  return oname;
1272}
1273
1274int
1275datalink_SetMode(struct datalink *dl, int mode)
1276{
1277  if (!physical_SetMode(dl->physical, mode))
1278    return 0;
1279  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1280    dl->script.run = 0;
1281  if (dl->physical->type == PHYS_DIRECT)
1282    dl->reconnect_tries = 0;
1283  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND) && dl->state <= DATALINK_READY)
1284    datalink_Up(dl, 1, 1);
1285  return 1;
1286}
1287