datalink.c revision 53684 
1/*-
2 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/usr.sbin/ppp/datalink.c 53684 1999-11-25 02:47:04Z brian $
27 */
28
29#include <sys/param.h>
30#include <netinet/in.h>
31#include <netinet/in_systm.h>
32#include <netinet/ip.h>
33#include <sys/un.h>
34
35#include <ctype.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <sys/uio.h>
40#include <termios.h>
41
42#include "layer.h"
43#include "mbuf.h"
44#include "log.h"
45#include "defs.h"
46#include "timer.h"
47#include "fsm.h"
48#include "lcp.h"
49#include "descriptor.h"
50#include "lqr.h"
51#include "hdlc.h"
52#include "async.h"
53#include "throughput.h"
54#include "ccp.h"
55#include "link.h"
56#include "physical.h"
57#include "iplist.h"
58#include "slcompress.h"
59#include "ipcp.h"
60#include "filter.h"
61#include "mp.h"
62#ifndef NORADIUS
63#include "radius.h"
64#endif
65#include "bundle.h"
66#include "chat.h"
67#include "auth.h"
68#include "prompt.h"
69#include "proto.h"
70#include "pap.h"
71#include "chap.h"
72#include "command.h"
73#include "cbcp.h"
74#include "datalink.h"
75
76static void datalink_LoginDone(struct datalink *);
77static void datalink_NewState(struct datalink *, int);
78
79static void
80datalink_OpenTimeout(void *v)
81{
82  struct datalink *dl = (struct datalink *)v;
83
84  timer_Stop(&dl->dial.timer);
85  if (dl->state == DATALINK_OPENING)
86    log_Printf(LogPHASE, "%s: Redial timer expired.\n", dl->name);
87}
88
89static int
90datalink_StartDialTimer(struct datalink *dl, int Timeout)
91{
92  int result = Timeout;
93
94  timer_Stop(&dl->dial.timer);
95  if (Timeout) {
96    if (Timeout > 0)
97      dl->dial.timer.load = Timeout * SECTICKS;
98    else {
99      result = (random() % DIAL_TIMEOUT) + 1;
100      dl->dial.timer.load = result * SECTICKS;
101    }
102    dl->dial.timer.func = datalink_OpenTimeout;
103    dl->dial.timer.name = "dial";
104    dl->dial.timer.arg = dl;
105    timer_Start(&dl->dial.timer);
106    if (dl->state == DATALINK_OPENING)
107      log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
108                dl->name, Timeout);
109  }
110  return result;
111}
112
113static void
114datalink_HangupDone(struct datalink *dl)
115{
116  if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
117      dl->physical->fd != -1) {
118    /* Don't close our device if the link is dedicated */
119    datalink_LoginDone(dl);
120    return;
121  }
122
123  chat_Destroy(&dl->chat);
124  physical_Close(dl->physical);
125  dl->phone.chosen = "N/A";
126
127  if (dl->cbcp.required) {
128    log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
129    dl->cfg.callback.opmask = 0;
130    strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
131            sizeof dl->cfg.phone.list - 1);
132    dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
133    dl->phone.alt = dl->phone.next = NULL;
134    dl->reconnect_tries = dl->cfg.reconnect.max;
135    dl->dial.tries = dl->cfg.dial.max;
136    dl->dial.incs = 0;
137    dl->script.run = 1;
138    dl->script.packetmode = 1;
139    if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
140      log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
141    bundle_LinksRemoved(dl->bundle);
142    /* if dial.timeout is < 0 (random), we don't override fsm.delay */
143    if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
144      dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
145    datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
146    cbcp_Down(&dl->cbcp);
147    datalink_NewState(dl, DATALINK_OPENING);
148    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
149        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
150      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
151  } else if (dl->bundle->CleaningUp ||
152      (dl->physical->type == PHYS_DIRECT) ||
153      ((!dl->dial.tries || (dl->dial.tries < 0 && !dl->reconnect_tries)) &&
154       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
155    datalink_NewState(dl, DATALINK_CLOSED);
156    dl->dial.tries = -1;
157    dl->dial.incs = 0;
158    dl->reconnect_tries = 0;
159    bundle_LinkClosed(dl->bundle, dl);
160    if (!dl->bundle->CleaningUp)
161      datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
162  } else {
163    datalink_NewState(dl, DATALINK_OPENING);
164    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
165        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
166      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
167    if (dl->dial.tries < 0) {
168      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
169      dl->dial.tries = dl->cfg.dial.max;
170      dl->dial.incs = 0;
171      dl->reconnect_tries--;
172    } else {
173      if (dl->phone.next == NULL)
174        datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
175      else
176        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
177    }
178  }
179}
180
181const char *
182datalink_ChoosePhoneNumber(struct datalink *dl)
183{
184  char *phone;
185
186  if (dl->phone.alt == NULL) {
187    if (dl->phone.next == NULL) {
188      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
189      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
190      if (*dl->phone.list == '\0')
191        return "";
192      dl->phone.next = dl->phone.list;
193    }
194    dl->phone.alt = strsep(&dl->phone.next, ":");
195  }
196  phone = strsep(&dl->phone.alt, "|");
197  dl->phone.chosen = *phone ? phone : "[NONE]";
198  if (*phone)
199    log_Printf(LogPHASE, "Phone: %s\n", phone);
200  return phone;
201}
202
203static void
204datalink_LoginDone(struct datalink *dl)
205{
206  chat_Destroy(&dl->chat);
207
208  if (!dl->script.packetmode) {
209    dl->dial.tries = -1;
210    dl->dial.incs = 0;
211    datalink_NewState(dl, DATALINK_READY);
212  } else if (!physical_Raw(dl->physical)) {
213    dl->dial.tries = 0;
214    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
215    if (dl->script.run) {
216      datalink_NewState(dl, DATALINK_LOGOUT);
217      chat_Init(&dl->chat, dl->physical, dl->cfg.script.logout, NULL);
218    } else {
219      physical_StopDeviceTimer(dl->physical);
220      if (dl->physical->type == PHYS_DEDICATED)
221        /* force a redial timeout */
222        physical_Close(dl->physical);
223      datalink_HangupDone(dl);
224    }
225  } else {
226    dl->dial.tries = -1;
227    dl->dial.incs = 0;
228
229    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
230    async_Init(&dl->physical->async);
231
232    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
233              0 : dl->physical->link.lcp.cfg.openmode);
234    ccp_Setup(&dl->physical->link.ccp);
235
236    datalink_NewState(dl, DATALINK_LCP);
237    fsm_Up(&dl->physical->link.lcp.fsm);
238    fsm_Open(&dl->physical->link.lcp.fsm);
239  }
240}
241
242static int
243datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
244                   int *n)
245{
246  struct datalink *dl = descriptor2datalink(d);
247  int result;
248
249  result = 0;
250  switch (dl->state) {
251    case DATALINK_CLOSED:
252      if ((dl->physical->type &
253           (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|PHYS_DDIAL)) &&
254          !dl->bundle->CleaningUp)
255        /*
256         * Our first time in - DEDICATED & DDIAL never come down, and
257         * DIRECT & BACKGROUND get deleted when they enter DATALINK_CLOSED.
258         * Go to DATALINK_OPENING via datalink_Up() and fall through.
259         */
260        datalink_Up(dl, 1, 1);
261      else
262        break;
263      /* fall through */
264
265    case DATALINK_OPENING:
266      if (dl->dial.timer.state != TIMER_RUNNING) {
267        if (--dl->dial.tries < 0)
268          dl->dial.tries = 0;
269        if (physical_Open(dl->physical, dl->bundle) >= 0) {
270          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
271                           "Type `~?' for help\r\n", dl->name,
272                           dl->physical->name.full);
273          if (dl->script.run) {
274            datalink_NewState(dl, DATALINK_DIAL);
275            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial,
276                      *dl->cfg.script.dial ?
277                      datalink_ChoosePhoneNumber(dl) : "");
278            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
279                dl->cfg.dial.max)
280              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
281                        dl->name, dl->cfg.dial.max - dl->dial.tries,
282                        dl->cfg.dial.max);
283          } else
284            datalink_NewState(dl, DATALINK_CARRIER);
285          return datalink_UpdateSet(d, r, w, e, n);
286        } else {
287          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
288              dl->cfg.dial.max)
289            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
290                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
291          else
292            log_Printf(LogCHAT, "Failed to open device\n");
293
294          if (dl->bundle->CleaningUp ||
295              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
296               dl->cfg.dial.max && dl->dial.tries == 0)) {
297            datalink_NewState(dl, DATALINK_CLOSED);
298            dl->reconnect_tries = 0;
299            dl->dial.tries = -1;
300            log_WritePrompts(dl, "Failed to open %s\n",
301                             dl->physical->name.full);
302            bundle_LinkClosed(dl->bundle, dl);
303          }
304          if (!dl->bundle->CleaningUp) {
305            int timeout;
306
307            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
308            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
309                             dl->physical->name.full, timeout);
310          }
311        }
312      }
313      break;
314
315    case DATALINK_CARRIER:
316      /* Wait for carrier on the device */
317      switch (physical_AwaitCarrier(dl->physical)) {
318        case CARRIER_PENDING:
319          log_Printf(LogDEBUG, "Waiting for carrier\n");
320          return 0;	/* A device timer is running to wake us up again */
321
322        case CARRIER_OK:
323          if (dl->script.run) {
324            datalink_NewState(dl, DATALINK_LOGIN);
325            chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, NULL);
326          } else
327            datalink_LoginDone(dl);
328          return datalink_UpdateSet(d, r, w, e, n);
329
330        case CARRIER_LOST:
331          physical_Offline(dl->physical);	/* Is this required ? */
332          if (dl->script.run) {
333            datalink_NewState(dl, DATALINK_HANGUP);
334            chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
335            return datalink_UpdateSet(d, r, w, e, n);
336          } else {
337            datalink_HangupDone(dl);
338            return 0;	/* Maybe bundle_CleanDatalinks() has something to do */
339          }
340      }
341
342    case DATALINK_HANGUP:
343    case DATALINK_DIAL:
344    case DATALINK_LOGOUT:
345    case DATALINK_LOGIN:
346      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
347      switch (dl->chat.state) {
348        case CHAT_DONE:
349          /* script succeeded */
350          switch(dl->state) {
351            case DATALINK_HANGUP:
352              datalink_HangupDone(dl);
353              break;
354            case DATALINK_DIAL:
355              datalink_NewState(dl, DATALINK_CARRIER);
356              return datalink_UpdateSet(d, r, w, e, n);
357            case DATALINK_LOGOUT:
358              datalink_NewState(dl, DATALINK_HANGUP);
359              physical_Offline(dl->physical);
360              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
361              return datalink_UpdateSet(d, r, w, e, n);
362            case DATALINK_LOGIN:
363              dl->phone.alt = NULL;
364              datalink_LoginDone(dl);
365              return datalink_UpdateSet(d, r, w, e, n);
366          }
367          break;
368        case CHAT_FAILED:
369          /* Going down - script failed */
370          log_Printf(LogWARN, "Chat script failed\n");
371          switch(dl->state) {
372            case DATALINK_HANGUP:
373              datalink_HangupDone(dl);
374              break;
375            case DATALINK_DIAL:
376            case DATALINK_LOGOUT:
377            case DATALINK_LOGIN:
378              datalink_NewState(dl, DATALINK_HANGUP);
379              physical_Offline(dl->physical);
380              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
381              return datalink_UpdateSet(d, r, w, e, n);
382          }
383          break;
384      }
385      break;
386
387    case DATALINK_READY:
388    case DATALINK_LCP:
389    case DATALINK_AUTH:
390    case DATALINK_CBCP:
391    case DATALINK_OPEN:
392      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
393               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
394      break;
395  }
396  return result;
397}
398
399int
400datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
401{
402  return physical_RemoveFromSet(dl->physical, r, w, e);
403}
404
405static int
406datalink_IsSet(struct descriptor *d, const fd_set *fdset)
407{
408  struct datalink *dl = descriptor2datalink(d);
409
410  switch (dl->state) {
411    case DATALINK_CLOSED:
412    case DATALINK_OPENING:
413      break;
414
415    case DATALINK_HANGUP:
416    case DATALINK_DIAL:
417    case DATALINK_LOGOUT:
418    case DATALINK_LOGIN:
419      return descriptor_IsSet(&dl->chat.desc, fdset);
420
421    case DATALINK_READY:
422    case DATALINK_LCP:
423    case DATALINK_AUTH:
424    case DATALINK_CBCP:
425    case DATALINK_OPEN:
426      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
427             descriptor_IsSet(&dl->physical->desc, fdset);
428  }
429  return 0;
430}
431
432static void
433datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
434{
435  struct datalink *dl = descriptor2datalink(d);
436
437  switch (dl->state) {
438    case DATALINK_CLOSED:
439    case DATALINK_OPENING:
440      break;
441
442    case DATALINK_HANGUP:
443    case DATALINK_DIAL:
444    case DATALINK_LOGOUT:
445    case DATALINK_LOGIN:
446      descriptor_Read(&dl->chat.desc, bundle, fdset);
447      break;
448
449    case DATALINK_READY:
450    case DATALINK_LCP:
451    case DATALINK_AUTH:
452    case DATALINK_CBCP:
453    case DATALINK_OPEN:
454      if (descriptor_IsSet(&dl->chap.desc, fdset))
455        descriptor_Read(&dl->chap.desc, bundle, fdset);
456      if (descriptor_IsSet(&dl->physical->desc, fdset))
457        descriptor_Read(&dl->physical->desc, bundle, fdset);
458      break;
459  }
460}
461
462static int
463datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
464{
465  struct datalink *dl = descriptor2datalink(d);
466  int result = 0;
467
468  switch (dl->state) {
469    case DATALINK_CLOSED:
470    case DATALINK_OPENING:
471      break;
472
473    case DATALINK_HANGUP:
474    case DATALINK_DIAL:
475    case DATALINK_LOGOUT:
476    case DATALINK_LOGIN:
477      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
478      break;
479
480    case DATALINK_READY:
481    case DATALINK_LCP:
482    case DATALINK_AUTH:
483    case DATALINK_CBCP:
484    case DATALINK_OPEN:
485      if (descriptor_IsSet(&dl->chap.desc, fdset))
486        result += descriptor_Write(&dl->chap.desc, bundle, fdset);
487      if (descriptor_IsSet(&dl->physical->desc, fdset))
488        result += descriptor_Write(&dl->physical->desc, bundle, fdset);
489      break;
490  }
491
492  return result;
493}
494
495static void
496datalink_ComeDown(struct datalink *dl, int how)
497{
498  if (how != CLOSE_NORMAL) {
499    dl->dial.tries = -1;
500    dl->reconnect_tries = 0;
501    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
502      dl->stayonline = 1;
503  }
504
505  if (dl->state >= DATALINK_READY && dl->stayonline) {
506    dl->stayonline = 0;
507    physical_StopDeviceTimer(dl->physical);
508    datalink_NewState(dl, DATALINK_READY);
509  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
510    physical_Offline(dl->physical);
511    if (dl->script.run && dl->state != DATALINK_OPENING) {
512      if (dl->state == DATALINK_LOGOUT) {
513        datalink_NewState(dl, DATALINK_HANGUP);
514        chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, NULL);
515      } else {
516        datalink_NewState(dl, DATALINK_LOGOUT);
517        chat_Init(&dl->chat, dl->physical, dl->cfg.script.logout, NULL);
518      }
519    } else
520      datalink_HangupDone(dl);
521  }
522}
523
524static void
525datalink_LayerStart(void *v, struct fsm *fp)
526{
527  /* The given FSM is about to start up ! */
528  struct datalink *dl = (struct datalink *)v;
529
530  if (fp->proto == PROTO_LCP)
531    (*dl->parent->LayerStart)(dl->parent->object, fp);
532}
533
534static void
535datalink_LayerUp(void *v, struct fsm *fp)
536{
537  /* The given fsm is now up */
538  struct datalink *dl = (struct datalink *)v;
539  struct lcp *lcp = &dl->physical->link.lcp;
540
541  if (fp->proto == PROTO_LCP) {
542    datalink_GotAuthname(dl, "");
543    lcp->auth_ineed = lcp->want_auth;
544    lcp->auth_iwait = lcp->his_auth;
545    if (lcp->his_auth || lcp->want_auth) {
546      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
547        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
548      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
549                Auth2Nam(lcp->his_auth, lcp->his_authtype),
550                Auth2Nam(lcp->want_auth, lcp->want_authtype));
551      if (lcp->his_auth == PROTO_PAP)
552        auth_StartReq(&dl->pap);
553      if (lcp->want_auth == PROTO_CHAP)
554        auth_StartReq(&dl->chap.auth);
555    } else
556      datalink_AuthOk(dl);
557  }
558}
559
560static void
561datalink_AuthReInit(struct datalink *dl)
562{
563  auth_StopTimer(&dl->pap);
564  auth_StopTimer(&dl->chap.auth);
565  chap_ReInit(&dl->chap);
566}
567
568void
569datalink_GotAuthname(struct datalink *dl, const char *name)
570{
571  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
572  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
573}
574
575void
576datalink_NCPUp(struct datalink *dl)
577{
578  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
579
580  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
581    /* we've authenticated in multilink mode ! */
582    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
583      case MP_LINKSENT:
584        /* We've handed the link off to another ppp (well, we will soon) ! */
585        return;
586      case MP_UP:
587        /* First link in the bundle */
588        auth_Select(dl->bundle, dl->peer.authname);
589        bundle_CalculateBandwidth(dl->bundle);
590        /* fall through */
591      case MP_ADDED:
592        /* We're in multilink mode ! */
593        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
594        bundle_CalculateBandwidth(dl->bundle);
595        break;
596      case MP_FAILED:
597        datalink_AuthNotOk(dl);
598        return;
599    }
600  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
601    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
602    datalink_NewState(dl, DATALINK_OPEN);
603    bundle_CalculateBandwidth(dl->bundle);
604    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
605    return;
606  } else {
607    dl->bundle->ncp.mp.peer = dl->peer;
608    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
609    auth_Select(dl->bundle, dl->peer.authname);
610  }
611
612  if (ccpok) {
613    fsm_Up(&dl->physical->link.ccp.fsm);
614    fsm_Open(&dl->physical->link.ccp.fsm);
615  }
616  datalink_NewState(dl, DATALINK_OPEN);
617  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
618  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
619}
620
621void
622datalink_CBCPComplete(struct datalink *dl)
623{
624  datalink_NewState(dl, DATALINK_LCP);
625  datalink_AuthReInit(dl);
626  fsm_Close(&dl->physical->link.lcp.fsm);
627}
628
629void
630datalink_CBCPFailed(struct datalink *dl)
631{
632  cbcp_Down(&dl->cbcp);
633  datalink_CBCPComplete(dl);
634}
635
636void
637datalink_AuthOk(struct datalink *dl)
638{
639  if ((dl->physical->link.lcp.his_callback.opmask &
640       CALLBACK_BIT(CALLBACK_CBCP) ||
641       dl->physical->link.lcp.want_callback.opmask &
642       CALLBACK_BIT(CALLBACK_CBCP)) &&
643      !(dl->physical->link.lcp.want_callback.opmask &
644        CALLBACK_BIT(CALLBACK_AUTH))) {
645    /* We must have agreed CBCP if AUTH isn't there any more */
646    datalink_NewState(dl, DATALINK_CBCP);
647    cbcp_Up(&dl->cbcp);
648  } else if (dl->physical->link.lcp.want_callback.opmask) {
649    /* It's not CBCP */
650    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
651    datalink_NewState(dl, DATALINK_LCP);
652    datalink_AuthReInit(dl);
653    fsm_Close(&dl->physical->link.lcp.fsm);
654  } else
655    switch (dl->physical->link.lcp.his_callback.opmask) {
656      case 0:
657        datalink_NCPUp(dl);
658        break;
659
660      case CALLBACK_BIT(CALLBACK_AUTH):
661        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
662                          sizeof dl->cbcp.fsm.phone);
663        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
664          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
665                     dl->peer.authname);
666          *dl->cbcp.fsm.phone = '\0';
667        } else {
668          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
669          if (ptr)
670            *ptr = '\0';	/* Call back on the first number */
671          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
672                     dl->cbcp.fsm.phone);
673          dl->cbcp.required = 1;
674        }
675        dl->cbcp.fsm.delay = 0;
676        datalink_NewState(dl, DATALINK_LCP);
677        datalink_AuthReInit(dl);
678        fsm_Close(&dl->physical->link.lcp.fsm);
679        break;
680
681      case CALLBACK_BIT(CALLBACK_E164):
682        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
683                sizeof dl->cbcp.fsm.phone - 1);
684        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
685        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
686                   dl->cbcp.fsm.phone);
687        dl->cbcp.required = 1;
688        dl->cbcp.fsm.delay = 0;
689        datalink_NewState(dl, DATALINK_LCP);
690        datalink_AuthReInit(dl);
691        fsm_Close(&dl->physical->link.lcp.fsm);
692        break;
693
694      default:
695        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
696                   dl->name);
697        datalink_NewState(dl, DATALINK_LCP);
698        datalink_AuthReInit(dl);
699        fsm_Close(&dl->physical->link.lcp.fsm);
700        break;
701    }
702}
703
704void
705datalink_AuthNotOk(struct datalink *dl)
706{
707  datalink_NewState(dl, DATALINK_LCP);
708  datalink_AuthReInit(dl);
709  fsm_Close(&dl->physical->link.lcp.fsm);
710}
711
712static void
713datalink_LayerDown(void *v, struct fsm *fp)
714{
715  /* The given FSM has been told to come down */
716  struct datalink *dl = (struct datalink *)v;
717
718  if (fp->proto == PROTO_LCP) {
719    switch (dl->state) {
720      case DATALINK_OPEN:
721        peerid_Init(&dl->peer);
722        fsm2initial(&dl->physical->link.ccp.fsm);
723        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
724        (*dl->parent->LayerDown)(dl->parent->object, fp);
725        /* fall through (just in case) */
726
727      case DATALINK_CBCP:
728        if (!dl->cbcp.required)
729          cbcp_Down(&dl->cbcp);
730        /* fall through (just in case) */
731
732      case DATALINK_AUTH:
733        timer_Stop(&dl->pap.authtimer);
734        timer_Stop(&dl->chap.auth.authtimer);
735    }
736    datalink_NewState(dl, DATALINK_LCP);
737    datalink_AuthReInit(dl);
738  }
739}
740
741static void
742datalink_LayerFinish(void *v, struct fsm *fp)
743{
744  /* The given fsm is now down */
745  struct datalink *dl = (struct datalink *)v;
746
747  if (fp->proto == PROTO_LCP) {
748    fsm2initial(fp);
749    (*dl->parent->LayerFinish)(dl->parent->object, fp);
750    datalink_ComeDown(dl, CLOSE_NORMAL);
751  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
752    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
753}
754
755struct datalink *
756datalink_Create(const char *name, struct bundle *bundle, int type)
757{
758  struct datalink *dl;
759
760  dl = (struct datalink *)malloc(sizeof(struct datalink));
761  if (dl == NULL)
762    return dl;
763
764  dl->desc.type = DATALINK_DESCRIPTOR;
765  dl->desc.UpdateSet = datalink_UpdateSet;
766  dl->desc.IsSet = datalink_IsSet;
767  dl->desc.Read = datalink_Read;
768  dl->desc.Write = datalink_Write;
769
770  dl->state = DATALINK_CLOSED;
771
772  *dl->cfg.script.dial = '\0';
773  *dl->cfg.script.login = '\0';
774  *dl->cfg.script.logout = '\0';
775  *dl->cfg.script.hangup = '\0';
776  *dl->cfg.phone.list = '\0';
777  *dl->phone.list = '\0';
778  dl->phone.next = NULL;
779  dl->phone.alt = NULL;
780  dl->phone.chosen = "N/A";
781  dl->stayonline = 0;
782  dl->script.run = 1;
783  dl->script.packetmode = 1;
784  mp_linkInit(&dl->mp);
785
786  dl->bundle = bundle;
787  dl->next = NULL;
788
789  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
790
791  dl->dial.tries = 0;
792  dl->cfg.dial.max = 1;
793  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
794  dl->cfg.dial.timeout = DIAL_TIMEOUT;
795  dl->cfg.dial.inc = 0;
796  dl->cfg.dial.maxinc = 10;
797
798  dl->reconnect_tries = 0;
799  dl->cfg.reconnect.max = 0;
800  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
801
802  dl->cfg.callback.opmask = 0;
803  dl->cfg.cbcp.delay = 0;
804  *dl->cfg.cbcp.phone = '\0';
805  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
806
807  dl->name = strdup(name);
808  peerid_Init(&dl->peer);
809  dl->parent = &bundle->fsm;
810  dl->fsmp.LayerStart = datalink_LayerStart;
811  dl->fsmp.LayerUp = datalink_LayerUp;
812  dl->fsmp.LayerDown = datalink_LayerDown;
813  dl->fsmp.LayerFinish = datalink_LayerFinish;
814  dl->fsmp.object = dl;
815
816  if ((dl->physical = physical_Create(dl, type)) == NULL) {
817    free(dl->name);
818    free(dl);
819    return NULL;
820  }
821
822  pap_Init(&dl->pap, dl->physical);
823  chap_Init(&dl->chap, dl->physical);
824  cbcp_Init(&dl->cbcp, dl->physical);
825
826  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
827  chat_Init(&dl->chat, dl->physical, NULL, NULL);
828
829  log_Printf(LogPHASE, "%s: Created in %s state\n",
830             dl->name, datalink_State(dl));
831
832  return dl;
833}
834
835struct datalink *
836datalink_Clone(struct datalink *odl, const char *name)
837{
838  struct datalink *dl;
839
840  dl = (struct datalink *)malloc(sizeof(struct datalink));
841  if (dl == NULL)
842    return dl;
843
844  dl->desc.type = DATALINK_DESCRIPTOR;
845  dl->desc.UpdateSet = datalink_UpdateSet;
846  dl->desc.IsSet = datalink_IsSet;
847  dl->desc.Read = datalink_Read;
848  dl->desc.Write = datalink_Write;
849
850  dl->state = DATALINK_CLOSED;
851
852  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
853  mp_linkInit(&dl->mp);
854  *dl->phone.list = '\0';
855  dl->phone.next = NULL;
856  dl->phone.alt = NULL;
857  dl->phone.chosen = "N/A";
858  dl->bundle = odl->bundle;
859  dl->next = NULL;
860  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
861  dl->dial.tries = 0;
862  dl->reconnect_tries = 0;
863  dl->name = strdup(name);
864  peerid_Init(&dl->peer);
865  dl->parent = odl->parent;
866  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
867  dl->fsmp.object = dl;
868
869  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
870    free(dl->name);
871    free(dl);
872    return NULL;
873  }
874  pap_Init(&dl->pap, dl->physical);
875  dl->pap.cfg = odl->pap.cfg;
876
877  chap_Init(&dl->chap, dl->physical);
878  dl->chap.auth.cfg = odl->chap.auth.cfg;
879
880  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
881  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
882         sizeof dl->physical->link.lcp.cfg);
883  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
884         sizeof dl->physical->link.ccp.cfg);
885  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
886         sizeof dl->physical->async.cfg);
887
888  cbcp_Init(&dl->cbcp, dl->physical);
889
890  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
891  chat_Init(&dl->chat, dl->physical, NULL, NULL);
892
893  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
894             dl->name, datalink_State(dl));
895
896  return dl;
897}
898
899struct datalink *
900datalink_Destroy(struct datalink *dl)
901{
902  struct datalink *result;
903
904  if (dl->state != DATALINK_CLOSED) {
905    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
906              datalink_State(dl));
907    switch (dl->state) {
908      case DATALINK_HANGUP:
909      case DATALINK_DIAL:
910      case DATALINK_LOGIN:
911        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
912        break;
913    }
914  }
915
916  timer_Stop(&dl->dial.timer);
917  result = dl->next;
918  physical_Destroy(dl->physical);
919  free(dl->name);
920  free(dl);
921
922  return result;
923}
924
925void
926datalink_Up(struct datalink *dl, int runscripts, int packetmode)
927{
928  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
929    /* Ignore scripts */
930    runscripts = 0;
931
932  switch (dl->state) {
933    case DATALINK_CLOSED:
934      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
935          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
936        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
937      datalink_NewState(dl, DATALINK_OPENING);
938      dl->reconnect_tries =
939        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
940      dl->dial.tries = dl->cfg.dial.max;
941      dl->script.run = runscripts;
942      dl->script.packetmode = packetmode;
943      break;
944
945    case DATALINK_OPENING:
946      if (!dl->script.run && runscripts)
947        dl->script.run = 1;
948      /* fall through */
949
950    case DATALINK_DIAL:
951    case DATALINK_LOGIN:
952    case DATALINK_READY:
953      if (!dl->script.packetmode && packetmode) {
954        dl->script.packetmode = 1;
955        if (dl->state == DATALINK_READY)
956          datalink_LoginDone(dl);
957      }
958      break;
959  }
960}
961
962void
963datalink_Close(struct datalink *dl, int how)
964{
965  /* Please close */
966  switch (dl->state) {
967    case DATALINK_OPEN:
968      peerid_Init(&dl->peer);
969      fsm2initial(&dl->physical->link.ccp.fsm);
970      /* fall through */
971
972    case DATALINK_CBCP:
973    case DATALINK_AUTH:
974    case DATALINK_LCP:
975      datalink_AuthReInit(dl);
976      fsm_Close(&dl->physical->link.lcp.fsm);
977      if (how != CLOSE_NORMAL) {
978        dl->dial.tries = -1;
979        dl->reconnect_tries = 0;
980        if (how == CLOSE_LCP)
981          dl->stayonline = 1;
982      }
983      break;
984
985    default:
986      datalink_ComeDown(dl, how);
987  }
988}
989
990void
991datalink_Down(struct datalink *dl, int how)
992{
993  /* Carrier is lost */
994  switch (dl->state) {
995    case DATALINK_OPEN:
996      peerid_Init(&dl->peer);
997      fsm2initial(&dl->physical->link.ccp.fsm);
998      /* fall through */
999
1000    case DATALINK_CBCP:
1001    case DATALINK_AUTH:
1002    case DATALINK_LCP:
1003      fsm2initial(&dl->physical->link.lcp.fsm);
1004      /* fall through */
1005
1006    default:
1007      datalink_ComeDown(dl, how);
1008  }
1009}
1010
1011void
1012datalink_StayDown(struct datalink *dl)
1013{
1014  dl->reconnect_tries = 0;
1015}
1016
1017void
1018datalink_DontHangup(struct datalink *dl)
1019{
1020  if (dl->state >= DATALINK_LCP)
1021    dl->stayonline = 1;
1022}
1023
1024int
1025datalink_Show(struct cmdargs const *arg)
1026{
1027  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1028  prompt_Printf(arg->prompt, " State:              %s\n",
1029                datalink_State(arg->cx));
1030  prompt_Printf(arg->prompt, " Peer name:          ");
1031  if (*arg->cx->peer.authname)
1032    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1033  else if (arg->cx->state == DATALINK_OPEN)
1034    prompt_Printf(arg->prompt, "None requested\n");
1035  else
1036    prompt_Printf(arg->prompt, "N/A\n");
1037  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1038                mp_Enddisc(arg->cx->peer.enddisc.class,
1039                           arg->cx->peer.enddisc.address,
1040                           arg->cx->peer.enddisc.len));
1041
1042  prompt_Printf(arg->prompt, "\nDefaults:\n");
1043  prompt_Printf(arg->prompt, " Phone List:         %s\n",
1044                arg->cx->cfg.phone.list);
1045  if (arg->cx->cfg.dial.max)
1046    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1047                  arg->cx->cfg.dial.max);
1048  else
1049    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1050  if (arg->cx->cfg.dial.next_timeout >= 0)
1051    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1052  else
1053    prompt_Printf(arg->prompt, "random/");
1054  if (arg->cx->cfg.dial.timeout >= 0)
1055    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1056  else
1057    prompt_Printf(arg->prompt, "random\n");
1058  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1059                arg->cx->cfg.reconnect.max);
1060  if (arg->cx->cfg.reconnect.timeout > 0)
1061    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1062  else
1063    prompt_Printf(arg->prompt, "random\n");
1064  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1065                PHYS_DIRECT ?  "accepted: " : "requested:");
1066  if (!arg->cx->cfg.callback.opmask)
1067    prompt_Printf(arg->prompt, "none\n");
1068  else {
1069    int comma = 0;
1070
1071    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1072      prompt_Printf(arg->prompt, "none");
1073      comma = 1;
1074    }
1075    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1076      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1077      comma = 1;
1078    }
1079    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1080      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1081      if (arg->cx->physical->type != PHYS_DIRECT)
1082        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1083      comma = 1;
1084    }
1085    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1086      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1087      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1088                    arg->cx->cfg.cbcp.delay);
1089      prompt_Printf(arg->prompt, "                     phone: ");
1090      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1091        if (arg->cx->physical->type & PHYS_DIRECT)
1092          prompt_Printf(arg->prompt, "Caller decides\n");
1093        else
1094          prompt_Printf(arg->prompt, "Dialback server decides\n");
1095      } else
1096        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1097      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1098                    arg->cx->cfg.cbcp.fsmretry);
1099    } else
1100      prompt_Printf(arg->prompt, "\n");
1101  }
1102
1103  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1104                arg->cx->cfg.script.dial);
1105  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1106                arg->cx->cfg.script.login);
1107  prompt_Printf(arg->prompt, " Logout Script:      %s\n",
1108                arg->cx->cfg.script.logout);
1109  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1110                arg->cx->cfg.script.hangup);
1111  return 0;
1112}
1113
1114int
1115datalink_SetReconnect(struct cmdargs const *arg)
1116{
1117  if (arg->argc == arg->argn+2) {
1118    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1119    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1120    return 0;
1121  }
1122  return -1;
1123}
1124
1125int
1126datalink_SetRedial(struct cmdargs const *arg)
1127{
1128  const char *sep, *osep;
1129  int timeout, inc, maxinc, tries;
1130
1131  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1132    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1133	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1134      arg->cx->cfg.dial.timeout = -1;
1135      randinit();
1136    } else {
1137      timeout = atoi(arg->argv[arg->argn]);
1138
1139      if (timeout >= 0)
1140	arg->cx->cfg.dial.timeout = timeout;
1141      else {
1142	log_Printf(LogWARN, "Invalid redial timeout\n");
1143	return -1;
1144      }
1145    }
1146
1147    sep = strchr(arg->argv[arg->argn], '+');
1148    if (sep) {
1149      inc = atoi(++sep);
1150      osep = sep;
1151      if (inc >= 0)
1152        arg->cx->cfg.dial.inc = inc;
1153      else {
1154        log_Printf(LogWARN, "Invalid timeout increment\n");
1155        return -1;
1156      }
1157      sep = strchr(sep, '-');
1158      if (sep) {
1159        maxinc = atoi(++sep);
1160        if (maxinc >= 0)
1161          arg->cx->cfg.dial.maxinc = maxinc;
1162        else {
1163          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1164          return -1;
1165        }
1166      } else {
1167        /* Default timeout increment */
1168        arg->cx->cfg.dial.maxinc = 10;
1169        sep = osep;
1170      }
1171    } else {
1172      /* Default timeout increment & max increment */
1173      arg->cx->cfg.dial.inc = 0;
1174      arg->cx->cfg.dial.maxinc = 10;
1175      sep = arg->argv[arg->argn];
1176    }
1177
1178    sep = strchr(sep, '.');
1179    if (sep) {
1180      if (strcasecmp(++sep, "random") == 0) {
1181	arg->cx->cfg.dial.next_timeout = -1;
1182	randinit();
1183      } else {
1184	timeout = atoi(sep);
1185	if (timeout >= 0)
1186	  arg->cx->cfg.dial.next_timeout = timeout;
1187	else {
1188	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1189	  return -1;
1190	}
1191      }
1192    } else
1193      /* Default next timeout */
1194      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1195
1196    if (arg->argc == arg->argn+2) {
1197      tries = atoi(arg->argv[arg->argn+1]);
1198
1199      if (tries >= 0) {
1200	arg->cx->cfg.dial.max = tries;
1201      } else {
1202	log_Printf(LogWARN, "Invalid retry value\n");
1203	return 1;
1204      }
1205    }
1206    return 0;
1207  }
1208
1209  return -1;
1210}
1211
1212static const char *states[] = {
1213  "closed",
1214  "opening",
1215  "hangup",
1216  "dial",
1217  "carrier",
1218  "logout",
1219  "login",
1220  "ready",
1221  "lcp",
1222  "auth",
1223  "cbcp",
1224  "open"
1225};
1226
1227const char *
1228datalink_State(struct datalink *dl)
1229{
1230  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1231    return "unknown";
1232  return states[dl->state];
1233}
1234
1235static void
1236datalink_NewState(struct datalink *dl, int state)
1237{
1238  if (state != dl->state) {
1239    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1240      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1241                 states[state]);
1242      dl->state = state;
1243    } else
1244      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1245  }
1246}
1247
1248struct datalink *
1249iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1250             int fd, int *auxfd, int *nauxfd)
1251{
1252  struct datalink *dl, *cdl;
1253  struct fsm_retry copy;
1254  char *oname;
1255
1256  dl = (struct datalink *)iov[(*niov)++].iov_base;
1257  dl->name = iov[*niov].iov_base;
1258
1259  if (dl->name[DATALINK_MAXNAME-1]) {
1260    dl->name[DATALINK_MAXNAME-1] = '\0';
1261    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1262      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1263  }
1264
1265  /* Make sure the name is unique ! */
1266  oname = NULL;
1267  do {
1268    for (cdl = bundle->links; cdl; cdl = cdl->next)
1269      if (!strcasecmp(dl->name, cdl->name)) {
1270        if (oname)
1271          free(datalink_NextName(dl));
1272        else
1273          oname = datalink_NextName(dl);
1274        break;	/* Keep renaming 'till we have no conflicts */
1275      }
1276  } while (cdl);
1277
1278  if (oname) {
1279    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1280    free(oname);
1281  } else {
1282    dl->name = strdup(dl->name);
1283    free(iov[*niov].iov_base);
1284  }
1285  (*niov)++;
1286
1287  dl->desc.type = DATALINK_DESCRIPTOR;
1288  dl->desc.UpdateSet = datalink_UpdateSet;
1289  dl->desc.IsSet = datalink_IsSet;
1290  dl->desc.Read = datalink_Read;
1291  dl->desc.Write = datalink_Write;
1292
1293  mp_linkInit(&dl->mp);
1294  *dl->phone.list = '\0';
1295  dl->phone.next = NULL;
1296  dl->phone.alt = NULL;
1297  dl->phone.chosen = "N/A";
1298
1299  dl->bundle = bundle;
1300  dl->next = NULL;
1301  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1302  dl->dial.tries = 0;
1303  dl->reconnect_tries = 0;
1304  dl->parent = &bundle->fsm;
1305  dl->fsmp.LayerStart = datalink_LayerStart;
1306  dl->fsmp.LayerUp = datalink_LayerUp;
1307  dl->fsmp.LayerDown = datalink_LayerDown;
1308  dl->fsmp.LayerFinish = datalink_LayerFinish;
1309  dl->fsmp.object = dl;
1310
1311  dl->physical = iov2physical(dl, iov, niov, maxiov, fd, auxfd, nauxfd);
1312
1313  if (!dl->physical) {
1314    free(dl->name);
1315    free(dl);
1316    dl = NULL;
1317  } else {
1318    copy = dl->pap.cfg.fsm;
1319    pap_Init(&dl->pap, dl->physical);
1320    dl->pap.cfg.fsm = copy;
1321
1322    copy = dl->chap.auth.cfg.fsm;
1323    chap_Init(&dl->chap, dl->physical);
1324    dl->chap.auth.cfg.fsm = copy;
1325
1326    cbcp_Init(&dl->cbcp, dl->physical);
1327
1328    memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
1329    chat_Init(&dl->chat, dl->physical, NULL, NULL);
1330
1331    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1332              dl->name, datalink_State(dl));
1333  }
1334
1335  return dl;
1336}
1337
1338int
1339datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1340             int *auxfd, int *nauxfd)
1341{
1342  /* If `dl' is NULL, we're allocating before a Fromiov() */
1343  int link_fd;
1344
1345  if (dl) {
1346    timer_Stop(&dl->dial.timer);
1347    /* The following is purely for the sake of paranoia */
1348    cbcp_Down(&dl->cbcp);
1349    timer_Stop(&dl->pap.authtimer);
1350    timer_Stop(&dl->chap.auth.authtimer);
1351  }
1352
1353  if (*niov >= maxiov - 1) {
1354    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1355    if (dl) {
1356      free(dl->name);
1357      free(dl);
1358    }
1359    return -1;
1360  }
1361
1362  iov[*niov].iov_base = (void *)dl;
1363  iov[(*niov)++].iov_len = sizeof *dl;
1364  iov[*niov].iov_base = dl ? realloc(dl->name, DATALINK_MAXNAME) : NULL;
1365  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1366
1367  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, auxfd,
1368                         nauxfd);
1369
1370  if (link_fd == -1 && dl) {
1371    free(dl->name);
1372    free(dl);
1373  }
1374
1375  return link_fd;
1376}
1377
1378void
1379datalink_Rename(struct datalink *dl, const char *name)
1380{
1381  free(dl->name);
1382  dl->physical->link.name = dl->name = strdup(name);
1383}
1384
1385char *
1386datalink_NextName(struct datalink *dl)
1387{
1388  int f, n;
1389  char *name, *oname;
1390
1391  n = strlen(dl->name);
1392  name = (char *)malloc(n+3);
1393  for (f = n - 1; f >= 0; f--)
1394    if (!isdigit(dl->name[f]))
1395      break;
1396  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1397  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1398  oname = dl->name;
1399  dl->name = name;
1400  /* our physical link name isn't updated (it probably isn't created yet) */
1401  return oname;
1402}
1403
1404int
1405datalink_SetMode(struct datalink *dl, int mode)
1406{
1407  if (!physical_SetMode(dl->physical, mode))
1408    return 0;
1409  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1410    dl->script.run = 0;
1411  if (dl->physical->type == PHYS_DIRECT)
1412    dl->reconnect_tries = 0;
1413  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND) && dl->state <= DATALINK_READY)
1414    datalink_Up(dl, 1, 1);
1415  return 1;
1416}
1417
1418int
1419datalink_GetDialTimeout(struct datalink *dl)
1420{
1421  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1422
1423  if (dl->dial.incs < dl->cfg.dial.maxinc)
1424    dl->dial.incs++;
1425
1426  return result;
1427}
1428