datalink.c revision 45350 
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 1.35 1999/03/04 17:42:15 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 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      physical_GetFD(dl->physical) != -1) {
118    /* Don't close our modem if the link is dedicated */
119    datalink_LoginDone(dl);
120    return;
121  }
122
123  modem_Close(dl->physical);
124  dl->phone.chosen = "N/A";
125
126  if (dl->cbcp.required) {
127    log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
128    dl->cfg.callback.opmask = 0;
129    strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
130            sizeof dl->cfg.phone.list - 1);
131    dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
132    dl->phone.alt = dl->phone.next = NULL;
133    dl->reconnect_tries = dl->cfg.reconnect.max;
134    dl->dial.tries = dl->cfg.dial.max;
135    dl->dial.incs = 0;
136    dl->script.run = 1;
137    dl->script.packetmode = 1;
138    if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
139      log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
140    bundle_LinksRemoved(dl->bundle);
141    /* if dial.timeout is < 0 (random), we don't override fsm.delay */
142    if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
143      dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
144    datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
145    cbcp_Down(&dl->cbcp);
146    datalink_NewState(dl, DATALINK_OPENING);
147  } else if (dl->bundle->CleaningUp ||
148      (dl->physical->type == PHYS_DIRECT) ||
149      ((!dl->dial.tries || (dl->dial.tries < 0 && !dl->reconnect_tries)) &&
150       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
151    datalink_NewState(dl, DATALINK_CLOSED);
152    dl->dial.tries = -1;
153    dl->dial.incs = 0;
154    dl->reconnect_tries = 0;
155    bundle_LinkClosed(dl->bundle, dl);
156    if (!dl->bundle->CleaningUp)
157      datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
158  } else {
159    datalink_NewState(dl, DATALINK_OPENING);
160    if (dl->dial.tries < 0) {
161      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
162      dl->dial.tries = dl->cfg.dial.max;
163      dl->dial.incs = 0;
164      dl->reconnect_tries--;
165    } else {
166      if (dl->phone.next == NULL)
167        datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
168      else
169        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
170    }
171  }
172}
173
174static const char *
175datalink_ChoosePhoneNumber(struct datalink *dl)
176{
177  char *phone;
178
179  if (dl->phone.alt == NULL) {
180    if (dl->phone.next == NULL) {
181      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
182      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
183      dl->phone.next = dl->phone.list;
184    }
185    dl->phone.alt = strsep(&dl->phone.next, ":");
186  }
187  phone = strsep(&dl->phone.alt, "|");
188  dl->phone.chosen = *phone ? phone : "[NONE]";
189  if (*phone)
190    log_Printf(LogPHASE, "Phone: %s\n", phone);
191  return phone;
192}
193
194static void
195datalink_LoginDone(struct datalink *dl)
196{
197  if (!dl->script.packetmode) {
198    dl->dial.tries = -1;
199    dl->dial.incs = 0;
200    datalink_NewState(dl, DATALINK_READY);
201  } else if (modem_Raw(dl->physical, dl->bundle) < 0) {
202    dl->dial.tries = 0;
203    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
204    if (dl->script.run) {
205      datalink_NewState(dl, DATALINK_HANGUP);
206      modem_Offline(dl->physical);
207      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
208    } else {
209      timer_Stop(&dl->physical->Timer);
210      if (dl->physical->type == PHYS_DEDICATED)
211        /* force a redial timeout */
212        modem_Close(dl->physical);
213      datalink_HangupDone(dl);
214    }
215  } else {
216    dl->dial.tries = -1;
217    dl->dial.incs = 0;
218
219    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
220    async_Init(&dl->physical->async);
221
222    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
223              0 : dl->physical->link.lcp.cfg.openmode);
224    ccp_Setup(&dl->physical->link.ccp);
225
226    datalink_NewState(dl, DATALINK_LCP);
227    fsm_Up(&dl->physical->link.lcp.fsm);
228    fsm_Open(&dl->physical->link.lcp.fsm);
229  }
230}
231
232static int
233datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
234                   int *n)
235{
236  struct datalink *dl = descriptor2datalink(d);
237  int result;
238
239  result = 0;
240  switch (dl->state) {
241    case DATALINK_CLOSED:
242      if ((dl->physical->type &
243           (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|PHYS_DDIAL)) &&
244          !bundle_IsDead(dl->bundle))
245        /*
246         * Our first time in - DEDICATED & DDIAL never come down, and
247         * DIRECT & BACKGROUND get deleted when they enter DATALINK_CLOSED.
248         * Go to DATALINK_OPENING via datalink_Up() and fall through.
249         */
250        datalink_Up(dl, 1, 1);
251      else
252        break;
253      /* fall through */
254
255    case DATALINK_OPENING:
256      if (dl->dial.timer.state != TIMER_RUNNING) {
257        if (--dl->dial.tries < 0)
258          dl->dial.tries = 0;
259        if (modem_Open(dl->physical, dl->bundle) >= 0) {
260          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
261                           "Type `~?' for help\r\n", dl->name,
262                           dl->physical->name.full);
263          if (dl->script.run) {
264            datalink_NewState(dl, DATALINK_DIAL);
265            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial, 1,
266                      datalink_ChoosePhoneNumber(dl));
267            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
268                dl->cfg.dial.max)
269              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
270                        dl->name, dl->cfg.dial.max - dl->dial.tries,
271                        dl->cfg.dial.max);
272          } else
273            datalink_LoginDone(dl);
274          return datalink_UpdateSet(d, r, w, e, n);
275        } else {
276          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
277              dl->cfg.dial.max)
278            log_Printf(LogCHAT, "Failed to open modem (attempt %u of %d)\n",
279                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
280          else
281            log_Printf(LogCHAT, "Failed to open modem\n");
282
283          if (dl->bundle->CleaningUp ||
284              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
285               dl->cfg.dial.max && dl->dial.tries == 0)) {
286            datalink_NewState(dl, DATALINK_CLOSED);
287            dl->reconnect_tries = 0;
288            dl->dial.tries = -1;
289            log_WritePrompts(dl, "Failed to open %s\n",
290                             dl->physical->name.full);
291            bundle_LinkClosed(dl->bundle, dl);
292          }
293          if (!dl->bundle->CleaningUp) {
294            int timeout;
295
296            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
297            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
298                             dl->physical->name.full, timeout);
299          }
300        }
301      }
302      break;
303
304    case DATALINK_HANGUP:
305    case DATALINK_DIAL:
306    case DATALINK_LOGIN:
307      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
308      switch (dl->chat.state) {
309        case CHAT_DONE:
310          /* script succeeded */
311          chat_Destroy(&dl->chat);
312          switch(dl->state) {
313            case DATALINK_HANGUP:
314              datalink_HangupDone(dl);
315              break;
316            case DATALINK_DIAL:
317              datalink_NewState(dl, DATALINK_LOGIN);
318              chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, 0, NULL);
319              return datalink_UpdateSet(d, r, w, e, n);
320            case DATALINK_LOGIN:
321              dl->phone.alt = NULL;
322              datalink_LoginDone(dl);
323              return datalink_UpdateSet(d, r, w, e, n);
324          }
325          break;
326        case CHAT_FAILED:
327          /* Going down - script failed */
328          log_Printf(LogWARN, "Chat script failed\n");
329          chat_Destroy(&dl->chat);
330          switch(dl->state) {
331            case DATALINK_HANGUP:
332              datalink_HangupDone(dl);
333              break;
334            case DATALINK_DIAL:
335            case DATALINK_LOGIN:
336              datalink_NewState(dl, DATALINK_HANGUP);
337              modem_Offline(dl->physical);	/* Is this required ? */
338              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
339              return datalink_UpdateSet(d, r, w, e, n);
340          }
341          break;
342      }
343      break;
344
345    case DATALINK_READY:
346    case DATALINK_LCP:
347    case DATALINK_AUTH:
348    case DATALINK_CBCP:
349    case DATALINK_OPEN:
350      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
351               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
352      break;
353  }
354  return result;
355}
356
357int
358datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
359{
360  return physical_RemoveFromSet(dl->physical, r, w, e);
361}
362
363static int
364datalink_IsSet(struct descriptor *d, const fd_set *fdset)
365{
366  struct datalink *dl = descriptor2datalink(d);
367
368  switch (dl->state) {
369    case DATALINK_CLOSED:
370    case DATALINK_OPENING:
371      break;
372
373    case DATALINK_HANGUP:
374    case DATALINK_DIAL:
375    case DATALINK_LOGIN:
376      return descriptor_IsSet(&dl->chat.desc, fdset);
377
378    case DATALINK_READY:
379    case DATALINK_LCP:
380    case DATALINK_AUTH:
381    case DATALINK_CBCP:
382    case DATALINK_OPEN:
383      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
384             descriptor_IsSet(&dl->physical->desc, fdset);
385  }
386  return 0;
387}
388
389static void
390datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
391{
392  struct datalink *dl = descriptor2datalink(d);
393
394  switch (dl->state) {
395    case DATALINK_CLOSED:
396    case DATALINK_OPENING:
397      break;
398
399    case DATALINK_HANGUP:
400    case DATALINK_DIAL:
401    case DATALINK_LOGIN:
402      descriptor_Read(&dl->chat.desc, bundle, fdset);
403      break;
404
405    case DATALINK_READY:
406    case DATALINK_LCP:
407    case DATALINK_AUTH:
408    case DATALINK_CBCP:
409    case DATALINK_OPEN:
410      if (descriptor_IsSet(&dl->chap.desc, fdset))
411        descriptor_Read(&dl->chap.desc, bundle, fdset);
412      if (descriptor_IsSet(&dl->physical->desc, fdset))
413        descriptor_Read(&dl->physical->desc, bundle, fdset);
414      break;
415  }
416}
417
418static int
419datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
420{
421  struct datalink *dl = descriptor2datalink(d);
422  int result = 0;
423
424  switch (dl->state) {
425    case DATALINK_CLOSED:
426    case DATALINK_OPENING:
427      break;
428
429    case DATALINK_HANGUP:
430    case DATALINK_DIAL:
431    case DATALINK_LOGIN:
432      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
433      break;
434
435    case DATALINK_READY:
436    case DATALINK_LCP:
437    case DATALINK_AUTH:
438    case DATALINK_CBCP:
439    case DATALINK_OPEN:
440      if (descriptor_IsSet(&dl->chap.desc, fdset))
441        result += descriptor_Write(&dl->chap.desc, bundle, fdset);
442      if (descriptor_IsSet(&dl->physical->desc, fdset))
443        result += descriptor_Write(&dl->physical->desc, bundle, fdset);
444      break;
445  }
446
447  return result;
448}
449
450static void
451datalink_ComeDown(struct datalink *dl, int how)
452{
453  if (how != CLOSE_NORMAL) {
454    dl->dial.tries = -1;
455    dl->reconnect_tries = 0;
456    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
457      dl->stayonline = 1;
458  }
459
460  if (dl->state >= DATALINK_READY && dl->stayonline) {
461    dl->stayonline = 0;
462    timer_Stop(&dl->physical->Timer);
463    datalink_NewState(dl, DATALINK_READY);
464  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
465    modem_Offline(dl->physical);
466    chat_Destroy(&dl->chat);
467    if (dl->script.run && dl->state != DATALINK_OPENING) {
468      datalink_NewState(dl, DATALINK_HANGUP);
469      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
470    } else
471      datalink_HangupDone(dl);
472  }
473}
474
475static void
476datalink_LayerStart(void *v, struct fsm *fp)
477{
478  /* The given FSM is about to start up ! */
479  struct datalink *dl = (struct datalink *)v;
480
481  if (fp->proto == PROTO_LCP)
482    (*dl->parent->LayerStart)(dl->parent->object, fp);
483}
484
485static void
486datalink_LayerUp(void *v, struct fsm *fp)
487{
488  /* The given fsm is now up */
489  struct datalink *dl = (struct datalink *)v;
490  struct lcp *lcp = &dl->physical->link.lcp;
491
492  if (fp->proto == PROTO_LCP) {
493    datalink_GotAuthname(dl, "");
494    lcp->auth_ineed = lcp->want_auth;
495    lcp->auth_iwait = lcp->his_auth;
496    if (lcp->his_auth || lcp->want_auth) {
497      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
498        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
499      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
500                Auth2Nam(lcp->his_auth, lcp->his_authtype),
501                Auth2Nam(lcp->want_auth, lcp->want_authtype));
502      if (lcp->his_auth == PROTO_PAP)
503        auth_StartReq(&dl->pap);
504      if (lcp->want_auth == PROTO_CHAP)
505        auth_StartReq(&dl->chap.auth);
506    } else
507      datalink_AuthOk(dl);
508  }
509}
510
511static void
512datalink_AuthReInit(struct datalink *dl)
513{
514  auth_StopTimer(&dl->pap);
515  auth_StopTimer(&dl->chap.auth);
516  chap_ReInit(&dl->chap);
517}
518
519void
520datalink_GotAuthname(struct datalink *dl, const char *name)
521{
522  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
523  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
524}
525
526void
527datalink_NCPUp(struct datalink *dl)
528{
529  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
530
531  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
532    /* we've authenticated in multilink mode ! */
533    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
534      case MP_LINKSENT:
535        /* We've handed the link off to another ppp (well, we will soon) ! */
536        return;
537      case MP_UP:
538        /* First link in the bundle */
539        auth_Select(dl->bundle, dl->peer.authname);
540        /* fall through */
541      case MP_ADDED:
542        /* We're in multilink mode ! */
543        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
544        break;
545      case MP_FAILED:
546        datalink_AuthNotOk(dl);
547        return;
548    }
549  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
550    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
551    datalink_NewState(dl, DATALINK_OPEN);
552    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
553    return;
554  } else {
555    dl->bundle->ncp.mp.peer = dl->peer;
556    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
557    auth_Select(dl->bundle, dl->peer.authname);
558  }
559
560  if (ccpok) {
561    fsm_Up(&dl->physical->link.ccp.fsm);
562    fsm_Open(&dl->physical->link.ccp.fsm);
563  }
564  datalink_NewState(dl, DATALINK_OPEN);
565  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
566  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
567}
568
569void
570datalink_CBCPComplete(struct datalink *dl)
571{
572  datalink_NewState(dl, DATALINK_LCP);
573  datalink_AuthReInit(dl);
574  fsm_Close(&dl->physical->link.lcp.fsm);
575}
576
577void
578datalink_CBCPFailed(struct datalink *dl)
579{
580  cbcp_Down(&dl->cbcp);
581  datalink_CBCPComplete(dl);
582}
583
584void
585datalink_AuthOk(struct datalink *dl)
586{
587  if ((dl->physical->link.lcp.his_callback.opmask &
588       CALLBACK_BIT(CALLBACK_CBCP) ||
589       dl->physical->link.lcp.want_callback.opmask &
590       CALLBACK_BIT(CALLBACK_CBCP)) &&
591      !(dl->physical->link.lcp.want_callback.opmask &
592        CALLBACK_BIT(CALLBACK_AUTH))) {
593    /* We must have agreed CBCP if AUTH isn't there any more */
594    datalink_NewState(dl, DATALINK_CBCP);
595    cbcp_Up(&dl->cbcp);
596  } else if (dl->physical->link.lcp.want_callback.opmask) {
597    /* It's not CBCP */
598    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
599    datalink_NewState(dl, DATALINK_LCP);
600    datalink_AuthReInit(dl);
601    fsm_Close(&dl->physical->link.lcp.fsm);
602  } else
603    switch (dl->physical->link.lcp.his_callback.opmask) {
604      case 0:
605        datalink_NCPUp(dl);
606        break;
607
608      case CALLBACK_BIT(CALLBACK_AUTH):
609        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
610                          sizeof dl->cbcp.fsm.phone);
611        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
612          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
613                     dl->peer.authname);
614          *dl->cbcp.fsm.phone = '\0';
615        } else {
616          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
617          if (ptr)
618            *ptr = '\0';	/* Call back on the first number */
619          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
620                     dl->cbcp.fsm.phone);
621          dl->cbcp.required = 1;
622        }
623        dl->cbcp.fsm.delay = 0;
624        datalink_NewState(dl, DATALINK_LCP);
625        datalink_AuthReInit(dl);
626        fsm_Close(&dl->physical->link.lcp.fsm);
627        break;
628
629      case CALLBACK_BIT(CALLBACK_E164):
630        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
631                sizeof dl->cbcp.fsm.phone - 1);
632        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
633        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
634                   dl->cbcp.fsm.phone);
635        dl->cbcp.required = 1;
636        dl->cbcp.fsm.delay = 0;
637        datalink_NewState(dl, DATALINK_LCP);
638        datalink_AuthReInit(dl);
639        fsm_Close(&dl->physical->link.lcp.fsm);
640        break;
641
642      default:
643        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
644                   dl->name);
645        datalink_NewState(dl, DATALINK_LCP);
646        datalink_AuthReInit(dl);
647        fsm_Close(&dl->physical->link.lcp.fsm);
648        break;
649    }
650}
651
652void
653datalink_AuthNotOk(struct datalink *dl)
654{
655  datalink_NewState(dl, DATALINK_LCP);
656  datalink_AuthReInit(dl);
657  fsm_Close(&dl->physical->link.lcp.fsm);
658}
659
660static void
661datalink_LayerDown(void *v, struct fsm *fp)
662{
663  /* The given FSM has been told to come down */
664  struct datalink *dl = (struct datalink *)v;
665
666  if (fp->proto == PROTO_LCP) {
667    switch (dl->state) {
668      case DATALINK_OPEN:
669        peerid_Init(&dl->peer);
670        fsm2initial(&dl->physical->link.ccp.fsm);
671        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
672        (*dl->parent->LayerDown)(dl->parent->object, fp);
673        /* fall through (just in case) */
674
675      case DATALINK_CBCP:
676        if (!dl->cbcp.required)
677          cbcp_Down(&dl->cbcp);
678        /* fall through (just in case) */
679
680      case DATALINK_AUTH:
681        timer_Stop(&dl->pap.authtimer);
682        timer_Stop(&dl->chap.auth.authtimer);
683    }
684    datalink_NewState(dl, DATALINK_LCP);
685    datalink_AuthReInit(dl);
686  }
687}
688
689static void
690datalink_LayerFinish(void *v, struct fsm *fp)
691{
692  /* The given fsm is now down */
693  struct datalink *dl = (struct datalink *)v;
694
695  if (fp->proto == PROTO_LCP) {
696    fsm2initial(fp);
697    (*dl->parent->LayerFinish)(dl->parent->object, fp);
698    datalink_ComeDown(dl, CLOSE_NORMAL);
699  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
700    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
701}
702
703struct datalink *
704datalink_Create(const char *name, struct bundle *bundle, int type)
705{
706  struct datalink *dl;
707
708  dl = (struct datalink *)malloc(sizeof(struct datalink));
709  if (dl == NULL)
710    return dl;
711
712  dl->desc.type = DATALINK_DESCRIPTOR;
713  dl->desc.UpdateSet = datalink_UpdateSet;
714  dl->desc.IsSet = datalink_IsSet;
715  dl->desc.Read = datalink_Read;
716  dl->desc.Write = datalink_Write;
717
718  dl->state = DATALINK_CLOSED;
719
720  *dl->cfg.script.dial = '\0';
721  *dl->cfg.script.login = '\0';
722  *dl->cfg.script.hangup = '\0';
723  *dl->cfg.phone.list = '\0';
724  *dl->phone.list = '\0';
725  dl->phone.next = NULL;
726  dl->phone.alt = NULL;
727  dl->phone.chosen = "N/A";
728  dl->stayonline = 0;
729  dl->script.run = 1;
730  dl->script.packetmode = 1;
731  mp_linkInit(&dl->mp);
732
733  dl->bundle = bundle;
734  dl->next = NULL;
735
736  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
737
738  dl->dial.tries = 0;
739  dl->cfg.dial.max = 1;
740  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
741  dl->cfg.dial.timeout = DIAL_TIMEOUT;
742  dl->cfg.dial.inc = 0;
743  dl->cfg.dial.maxinc = 10;
744
745  dl->reconnect_tries = 0;
746  dl->cfg.reconnect.max = 0;
747  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
748
749  dl->cfg.callback.opmask = 0;
750  dl->cfg.cbcp.delay = 0;
751  *dl->cfg.cbcp.phone = '\0';
752  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
753
754  dl->name = strdup(name);
755  peerid_Init(&dl->peer);
756  dl->parent = &bundle->fsm;
757  dl->fsmp.LayerStart = datalink_LayerStart;
758  dl->fsmp.LayerUp = datalink_LayerUp;
759  dl->fsmp.LayerDown = datalink_LayerDown;
760  dl->fsmp.LayerFinish = datalink_LayerFinish;
761  dl->fsmp.object = dl;
762
763  if ((dl->physical = modem_Create(dl, type)) == NULL) {
764    free(dl->name);
765    free(dl);
766    return NULL;
767  }
768
769  pap_Init(&dl->pap, dl->physical);
770  chap_Init(&dl->chap, dl->physical);
771  cbcp_Init(&dl->cbcp, dl->physical);
772  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
773
774  log_Printf(LogPHASE, "%s: Created in %s state\n",
775             dl->name, datalink_State(dl));
776
777  return dl;
778}
779
780struct datalink *
781datalink_Clone(struct datalink *odl, const char *name)
782{
783  struct datalink *dl;
784
785  dl = (struct datalink *)malloc(sizeof(struct datalink));
786  if (dl == NULL)
787    return dl;
788
789  dl->desc.type = DATALINK_DESCRIPTOR;
790  dl->desc.UpdateSet = datalink_UpdateSet;
791  dl->desc.IsSet = datalink_IsSet;
792  dl->desc.Read = datalink_Read;
793  dl->desc.Write = datalink_Write;
794
795  dl->state = DATALINK_CLOSED;
796
797  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
798  mp_linkInit(&dl->mp);
799  *dl->phone.list = '\0';
800  dl->phone.next = NULL;
801  dl->phone.alt = NULL;
802  dl->phone.chosen = "N/A";
803  dl->bundle = odl->bundle;
804  dl->next = NULL;
805  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
806  dl->dial.tries = 0;
807  dl->reconnect_tries = 0;
808  dl->name = strdup(name);
809  peerid_Init(&dl->peer);
810  dl->parent = odl->parent;
811  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
812  dl->fsmp.object = dl;
813
814  if ((dl->physical = modem_Create(dl, PHYS_INTERACTIVE)) == NULL) {
815    free(dl->name);
816    free(dl);
817    return NULL;
818  }
819  pap_Init(&dl->pap, dl->physical);
820  dl->pap.cfg = odl->pap.cfg;
821
822  chap_Init(&dl->chap, dl->physical);
823  dl->chap.auth.cfg = odl->chap.auth.cfg;
824
825  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
826  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
827         sizeof dl->physical->link.lcp.cfg);
828  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
829         sizeof dl->physical->link.ccp.cfg);
830  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
831         sizeof dl->physical->async.cfg);
832
833  cbcp_Init(&dl->cbcp, dl->physical);
834  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
835
836  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
837             dl->name, datalink_State(dl));
838
839  return dl;
840}
841
842struct datalink *
843datalink_Destroy(struct datalink *dl)
844{
845  struct datalink *result;
846
847  if (dl->state != DATALINK_CLOSED) {
848    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
849              datalink_State(dl));
850    switch (dl->state) {
851      case DATALINK_HANGUP:
852      case DATALINK_DIAL:
853      case DATALINK_LOGIN:
854        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
855        break;
856    }
857  }
858
859  timer_Stop(&dl->dial.timer);
860  result = dl->next;
861  modem_Destroy(dl->physical);
862  free(dl->name);
863  free(dl);
864
865  return result;
866}
867
868void
869datalink_Up(struct datalink *dl, int runscripts, int packetmode)
870{
871  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
872    /* Ignore scripts */
873    runscripts = 0;
874
875  switch (dl->state) {
876    case DATALINK_CLOSED:
877      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
878          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
879        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
880      datalink_NewState(dl, DATALINK_OPENING);
881      dl->reconnect_tries =
882        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
883      dl->dial.tries = dl->cfg.dial.max;
884      dl->script.run = runscripts;
885      dl->script.packetmode = packetmode;
886      break;
887
888    case DATALINK_OPENING:
889      if (!dl->script.run && runscripts)
890        dl->script.run = 1;
891      /* fall through */
892
893    case DATALINK_DIAL:
894    case DATALINK_LOGIN:
895    case DATALINK_READY:
896      if (!dl->script.packetmode && packetmode) {
897        dl->script.packetmode = 1;
898        if (dl->state == DATALINK_READY)
899          datalink_LoginDone(dl);
900      }
901      break;
902  }
903}
904
905void
906datalink_Close(struct datalink *dl, int how)
907{
908  /* Please close */
909  switch (dl->state) {
910    case DATALINK_OPEN:
911      peerid_Init(&dl->peer);
912      fsm2initial(&dl->physical->link.ccp.fsm);
913      /* fall through */
914
915    case DATALINK_CBCP:
916    case DATALINK_AUTH:
917    case DATALINK_LCP:
918      datalink_AuthReInit(dl);
919      fsm_Close(&dl->physical->link.lcp.fsm);
920      if (how != CLOSE_NORMAL) {
921        dl->dial.tries = -1;
922        dl->reconnect_tries = 0;
923        if (how == CLOSE_LCP)
924          dl->stayonline = 1;
925      }
926      break;
927
928    default:
929      datalink_ComeDown(dl, how);
930  }
931}
932
933void
934datalink_Down(struct datalink *dl, int how)
935{
936  /* Carrier is lost */
937  switch (dl->state) {
938    case DATALINK_OPEN:
939      peerid_Init(&dl->peer);
940      fsm2initial(&dl->physical->link.ccp.fsm);
941      /* fall through */
942
943    case DATALINK_CBCP:
944    case DATALINK_AUTH:
945    case DATALINK_LCP:
946      fsm2initial(&dl->physical->link.lcp.fsm);
947      /* fall through */
948
949    default:
950      datalink_ComeDown(dl, how);
951  }
952}
953
954void
955datalink_StayDown(struct datalink *dl)
956{
957  dl->reconnect_tries = 0;
958}
959
960void
961datalink_DontHangup(struct datalink *dl)
962{
963  if (dl->state >= DATALINK_LCP)
964    dl->stayonline = 1;
965}
966
967int
968datalink_Show(struct cmdargs const *arg)
969{
970  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
971  prompt_Printf(arg->prompt, " State:              %s\n",
972                datalink_State(arg->cx));
973  prompt_Printf(arg->prompt, " Peer name:          ");
974  if (*arg->cx->peer.authname)
975    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
976  else if (arg->cx->state == DATALINK_OPEN)
977    prompt_Printf(arg->prompt, "None requested\n");
978  else
979    prompt_Printf(arg->prompt, "N/A\n");
980  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
981                mp_Enddisc(arg->cx->peer.enddisc.class,
982                           arg->cx->peer.enddisc.address,
983                           arg->cx->peer.enddisc.len));
984
985  prompt_Printf(arg->prompt, "\nDefaults:\n");
986  prompt_Printf(arg->prompt, " Phone List:         %s\n",
987                arg->cx->cfg.phone.list);
988  if (arg->cx->cfg.dial.max)
989    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
990                  arg->cx->cfg.dial.max);
991  else
992    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
993  if (arg->cx->cfg.dial.next_timeout >= 0)
994    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
995  else
996    prompt_Printf(arg->prompt, "random/");
997  if (arg->cx->cfg.dial.timeout >= 0)
998    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
999  else
1000    prompt_Printf(arg->prompt, "random\n");
1001  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1002                arg->cx->cfg.reconnect.max);
1003  if (arg->cx->cfg.reconnect.timeout > 0)
1004    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1005  else
1006    prompt_Printf(arg->prompt, "random\n");
1007  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1008                PHYS_DIRECT ?  "accepted: " : "requested:");
1009  if (!arg->cx->cfg.callback.opmask)
1010    prompt_Printf(arg->prompt, "none\n");
1011  else {
1012    int comma = 0;
1013
1014    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1015      prompt_Printf(arg->prompt, "none");
1016      comma = 1;
1017    }
1018    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1019      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1020      comma = 1;
1021    }
1022    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1023      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1024      if (arg->cx->physical->type != PHYS_DIRECT)
1025        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1026      comma = 1;
1027    }
1028    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1029      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1030      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1031                    arg->cx->cfg.cbcp.delay);
1032      prompt_Printf(arg->prompt, "                     phone: ");
1033      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1034        if (arg->cx->physical->type & PHYS_DIRECT)
1035          prompt_Printf(arg->prompt, "Caller decides\n");
1036        else
1037          prompt_Printf(arg->prompt, "Dialback server decides\n");
1038      } else
1039        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1040      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1041                    arg->cx->cfg.cbcp.fsmretry);
1042    } else
1043      prompt_Printf(arg->prompt, "\n");
1044  }
1045
1046  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1047                arg->cx->cfg.script.dial);
1048  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1049                arg->cx->cfg.script.login);
1050  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1051                arg->cx->cfg.script.hangup);
1052  return 0;
1053}
1054
1055int
1056datalink_SetReconnect(struct cmdargs const *arg)
1057{
1058  if (arg->argc == arg->argn+2) {
1059    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1060    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1061    return 0;
1062  }
1063  return -1;
1064}
1065
1066int
1067datalink_SetRedial(struct cmdargs const *arg)
1068{
1069  const char *sep, *osep;
1070  int timeout, inc, maxinc, tries;
1071
1072  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1073    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1074	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1075      arg->cx->cfg.dial.timeout = -1;
1076      randinit();
1077    } else {
1078      timeout = atoi(arg->argv[arg->argn]);
1079
1080      if (timeout >= 0)
1081	arg->cx->cfg.dial.timeout = timeout;
1082      else {
1083	log_Printf(LogWARN, "Invalid redial timeout\n");
1084	return -1;
1085      }
1086    }
1087
1088    sep = strchr(arg->argv[arg->argn], '+');
1089    if (sep) {
1090      inc = atoi(++sep);
1091      osep = sep;
1092      if (inc >= 0)
1093        arg->cx->cfg.dial.inc = inc;
1094      else {
1095        log_Printf(LogWARN, "Invalid timeout increment\n");
1096        return -1;
1097      }
1098      sep = strchr(sep, '-');
1099      if (sep) {
1100        maxinc = atoi(++sep);
1101        if (maxinc >= 0)
1102          arg->cx->cfg.dial.maxinc = maxinc;
1103        else {
1104          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1105          return -1;
1106        }
1107      } else {
1108        /* Default timeout increment */
1109        arg->cx->cfg.dial.maxinc = 10;
1110        sep = osep;
1111      }
1112    } else {
1113      /* Default timeout increment & max increment */
1114      arg->cx->cfg.dial.inc = 0;
1115      arg->cx->cfg.dial.maxinc = 10;
1116      sep = arg->argv[arg->argn];
1117    }
1118
1119    sep = strchr(sep, '.');
1120    if (sep) {
1121      if (strcasecmp(++sep, "random") == 0) {
1122	arg->cx->cfg.dial.next_timeout = -1;
1123	randinit();
1124      } else {
1125	timeout = atoi(sep);
1126	if (timeout >= 0)
1127	  arg->cx->cfg.dial.next_timeout = timeout;
1128	else {
1129	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1130	  return -1;
1131	}
1132      }
1133    } else
1134      /* Default next timeout */
1135      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1136
1137    if (arg->argc == arg->argn+2) {
1138      tries = atoi(arg->argv[arg->argn+1]);
1139
1140      if (tries >= 0) {
1141	arg->cx->cfg.dial.max = tries;
1142      } else {
1143	log_Printf(LogWARN, "Invalid retry value\n");
1144	return 1;
1145      }
1146    }
1147    return 0;
1148  }
1149
1150  return -1;
1151}
1152
1153static const char *states[] = {
1154  "closed",
1155  "opening",
1156  "hangup",
1157  "dial",
1158  "login",
1159  "ready",
1160  "lcp",
1161  "auth",
1162  "cbcp",
1163  "open"
1164};
1165
1166const char *
1167datalink_State(struct datalink *dl)
1168{
1169  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1170    return "unknown";
1171  return states[dl->state];
1172}
1173
1174static void
1175datalink_NewState(struct datalink *dl, int state)
1176{
1177  if (state != dl->state) {
1178    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1179      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1180                 states[state]);
1181      dl->state = state;
1182    } else
1183      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1184  }
1185}
1186
1187struct datalink *
1188iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1189             int fd)
1190{
1191  struct datalink *dl, *cdl;
1192  struct fsm_retry copy;
1193  char *oname;
1194
1195  dl = (struct datalink *)iov[(*niov)++].iov_base;
1196  dl->name = iov[*niov].iov_base;
1197
1198  if (dl->name[DATALINK_MAXNAME-1]) {
1199    dl->name[DATALINK_MAXNAME-1] = '\0';
1200    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1201      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1202  }
1203
1204  /* Make sure the name is unique ! */
1205  oname = NULL;
1206  do {
1207    for (cdl = bundle->links; cdl; cdl = cdl->next)
1208      if (!strcasecmp(dl->name, cdl->name)) {
1209        if (oname)
1210          free(datalink_NextName(dl));
1211        else
1212          oname = datalink_NextName(dl);
1213        break;	/* Keep renaming 'till we have no conflicts */
1214      }
1215  } while (cdl);
1216
1217  if (oname) {
1218    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1219    free(oname);
1220  } else {
1221    dl->name = strdup(dl->name);
1222    free(iov[*niov].iov_base);
1223  }
1224  (*niov)++;
1225
1226  dl->desc.type = DATALINK_DESCRIPTOR;
1227  dl->desc.UpdateSet = datalink_UpdateSet;
1228  dl->desc.IsSet = datalink_IsSet;
1229  dl->desc.Read = datalink_Read;
1230  dl->desc.Write = datalink_Write;
1231
1232  mp_linkInit(&dl->mp);
1233  *dl->phone.list = '\0';
1234  dl->phone.next = NULL;
1235  dl->phone.alt = NULL;
1236  dl->phone.chosen = "N/A";
1237
1238  dl->bundle = bundle;
1239  dl->next = NULL;
1240  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1241  dl->dial.tries = 0;
1242  dl->reconnect_tries = 0;
1243  dl->parent = &bundle->fsm;
1244  dl->fsmp.LayerStart = datalink_LayerStart;
1245  dl->fsmp.LayerUp = datalink_LayerUp;
1246  dl->fsmp.LayerDown = datalink_LayerDown;
1247  dl->fsmp.LayerFinish = datalink_LayerFinish;
1248  dl->fsmp.object = dl;
1249
1250  dl->physical = iov2modem(dl, iov, niov, maxiov, fd);
1251
1252  if (!dl->physical) {
1253    free(dl->name);
1254    free(dl);
1255    dl = NULL;
1256  } else {
1257    copy = dl->pap.cfg.fsm;
1258    pap_Init(&dl->pap, dl->physical);
1259    dl->pap.cfg.fsm = copy;
1260
1261    copy = dl->chap.auth.cfg.fsm;
1262    chap_Init(&dl->chap, dl->physical);
1263    dl->chap.auth.cfg.fsm = copy;
1264
1265    cbcp_Init(&dl->cbcp, dl->physical);
1266    chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
1267
1268    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1269              dl->name, datalink_State(dl));
1270  }
1271
1272  return dl;
1273}
1274
1275int
1276datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1277             pid_t newpid)
1278{
1279  /* If `dl' is NULL, we're allocating before a Fromiov() */
1280  int link_fd;
1281
1282  if (dl) {
1283    timer_Stop(&dl->dial.timer);
1284    /* The following is purely for the sake of paranoia */
1285    cbcp_Down(&dl->cbcp);
1286    timer_Stop(&dl->pap.authtimer);
1287    timer_Stop(&dl->chap.auth.authtimer);
1288  }
1289
1290  if (*niov >= maxiov - 1) {
1291    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1292    if (dl) {
1293      free(dl->name);
1294      free(dl);
1295    }
1296    return -1;
1297  }
1298
1299  iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl);
1300  iov[(*niov)++].iov_len = sizeof *dl;
1301  iov[*niov].iov_base =
1302    dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME);
1303  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1304
1305  link_fd = modem2iov(dl ? dl->physical : NULL, iov, niov, maxiov, newpid);
1306
1307  if (link_fd == -1 && dl) {
1308    free(dl->name);
1309    free(dl);
1310  }
1311
1312  return link_fd;
1313}
1314
1315void
1316datalink_Rename(struct datalink *dl, const char *name)
1317{
1318  free(dl->name);
1319  dl->physical->link.name = dl->name = strdup(name);
1320}
1321
1322char *
1323datalink_NextName(struct datalink *dl)
1324{
1325  int f, n;
1326  char *name, *oname;
1327
1328  n = strlen(dl->name);
1329  name = (char *)malloc(n+3);
1330  for (f = n - 1; f >= 0; f--)
1331    if (!isdigit(dl->name[f]))
1332      break;
1333  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1334  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1335  oname = dl->name;
1336  dl->name = name;
1337  /* our physical link name isn't updated (it probably isn't created yet) */
1338  return oname;
1339}
1340
1341int
1342datalink_SetMode(struct datalink *dl, int mode)
1343{
1344  if (!physical_SetMode(dl->physical, mode))
1345    return 0;
1346  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1347    dl->script.run = 0;
1348  if (dl->physical->type == PHYS_DIRECT)
1349    dl->reconnect_tries = 0;
1350  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND) && dl->state <= DATALINK_READY)
1351    datalink_Up(dl, 1, 1);
1352  return 1;
1353}
1354
1355int
1356datalink_GetDialTimeout(struct datalink *dl)
1357{
1358  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1359
1360  if (dl->dial.incs < dl->cfg.dial.maxinc)
1361    dl->dial.incs++;
1362
1363  return result;
1364}
1365