datalink.c revision 56656 
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 56656 2000-01-27 00:40:25Z 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_Finish(&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_Finish(&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      if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
218        log_Printf(LogWARN, "Invalid logout script\n");
219    } else {
220      physical_StopDeviceTimer(dl->physical);
221      if (dl->physical->type == PHYS_DEDICATED)
222        /* force a redial timeout */
223        physical_Close(dl->physical);
224      datalink_HangupDone(dl);
225    }
226  } else {
227    dl->dial.tries = -1;
228    dl->dial.incs = 0;
229
230    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
231    async_Init(&dl->physical->async);
232
233    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
234              0 : dl->physical->link.lcp.cfg.openmode);
235    ccp_Setup(&dl->physical->link.ccp);
236
237    datalink_NewState(dl, DATALINK_LCP);
238    fsm_Up(&dl->physical->link.lcp.fsm);
239    fsm_Open(&dl->physical->link.lcp.fsm);
240  }
241}
242
243static int
244datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
245                   int *n)
246{
247  struct datalink *dl = descriptor2datalink(d);
248  int result;
249
250  result = 0;
251  switch (dl->state) {
252    case DATALINK_CLOSED:
253      if ((dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|
254                                 PHYS_FOREGROUND|PHYS_DDIAL)) &&
255          !dl->bundle->CleaningUp)
256        /*
257         * Our first time in - DEDICATED & DDIAL never come down, and
258         * DIRECT, FOREGROUND & BACKGROUND get deleted when they enter
259         * DATALINK_CLOSED.  Go to DATALINK_OPENING via datalink_Up()
260         * and fall through.
261         */
262        datalink_Up(dl, 1, 1);
263      else
264        break;
265      /* fall through */
266
267    case DATALINK_OPENING:
268      if (dl->dial.timer.state != TIMER_RUNNING) {
269        if (--dl->dial.tries < 0)
270          dl->dial.tries = 0;
271        if (physical_Open(dl->physical, dl->bundle) >= 0) {
272          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
273                           "Type `~?' for help\r\n", dl->name,
274                           dl->physical->name.full);
275          if (dl->script.run) {
276            datalink_NewState(dl, DATALINK_DIAL);
277            if (!chat_Setup(&dl->chat, dl->cfg.script.dial,
278                            *dl->cfg.script.dial ?
279                            datalink_ChoosePhoneNumber(dl) : ""))
280              log_Printf(LogWARN, "Invalid dial script\n");
281            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
282                dl->cfg.dial.max)
283              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
284                        dl->name, dl->cfg.dial.max - dl->dial.tries,
285                        dl->cfg.dial.max);
286          } else
287            datalink_NewState(dl, DATALINK_CARRIER);
288          return datalink_UpdateSet(d, r, w, e, n);
289        } else {
290          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
291              dl->cfg.dial.max)
292            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
293                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
294          else
295            log_Printf(LogCHAT, "Failed to open device\n");
296
297          if (dl->bundle->CleaningUp ||
298              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
299               dl->cfg.dial.max && dl->dial.tries == 0)) {
300            datalink_NewState(dl, DATALINK_CLOSED);
301            dl->reconnect_tries = 0;
302            dl->dial.tries = -1;
303            log_WritePrompts(dl, "Failed to open %s\n",
304                             dl->physical->name.full);
305            bundle_LinkClosed(dl->bundle, dl);
306          }
307          if (!dl->bundle->CleaningUp) {
308            int timeout;
309
310            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
311            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
312                             dl->physical->name.full, timeout);
313          }
314        }
315      }
316      break;
317
318    case DATALINK_CARRIER:
319      /* Wait for carrier on the device */
320      switch (physical_AwaitCarrier(dl->physical)) {
321        case CARRIER_PENDING:
322          log_Printf(LogDEBUG, "Waiting for carrier\n");
323          return 0;	/* A device timer is running to wake us up again */
324
325        case CARRIER_OK:
326          if (dl->script.run) {
327            datalink_NewState(dl, DATALINK_LOGIN);
328            if (!chat_Setup(&dl->chat, dl->cfg.script.login, NULL))
329              log_Printf(LogWARN, "Invalid login script\n");
330          } else
331            datalink_LoginDone(dl);
332          return datalink_UpdateSet(d, r, w, e, n);
333
334        case CARRIER_LOST:
335          physical_Offline(dl->physical);	/* Is this required ? */
336          if (dl->script.run) {
337            datalink_NewState(dl, DATALINK_HANGUP);
338            if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
339              log_Printf(LogWARN, "Invalid hangup script\n");
340            return datalink_UpdateSet(d, r, w, e, n);
341          } else {
342            datalink_HangupDone(dl);
343            return 0;	/* Maybe bundle_CleanDatalinks() has something to do */
344          }
345      }
346
347    case DATALINK_HANGUP:
348    case DATALINK_DIAL:
349    case DATALINK_LOGOUT:
350    case DATALINK_LOGIN:
351      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
352      switch (dl->chat.state) {
353        case CHAT_DONE:
354          /* script succeeded */
355          switch(dl->state) {
356            case DATALINK_HANGUP:
357              datalink_HangupDone(dl);
358              break;
359            case DATALINK_DIAL:
360              datalink_NewState(dl, DATALINK_CARRIER);
361              return datalink_UpdateSet(d, r, w, e, n);
362            case DATALINK_LOGOUT:
363              datalink_NewState(dl, DATALINK_HANGUP);
364              physical_Offline(dl->physical);
365              if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
366                log_Printf(LogWARN, "Invalid hangup script\n");
367              return datalink_UpdateSet(d, r, w, e, n);
368            case DATALINK_LOGIN:
369              dl->phone.alt = NULL;
370              datalink_LoginDone(dl);
371              return datalink_UpdateSet(d, r, w, e, n);
372          }
373          break;
374        case CHAT_FAILED:
375          /* Going down - script failed */
376          log_Printf(LogWARN, "Chat script failed\n");
377          switch(dl->state) {
378            case DATALINK_HANGUP:
379              datalink_HangupDone(dl);
380              break;
381            case DATALINK_DIAL:
382            case DATALINK_LOGOUT:
383            case DATALINK_LOGIN:
384              datalink_NewState(dl, DATALINK_HANGUP);
385              physical_Offline(dl->physical);
386              if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
387                log_Printf(LogWARN, "Invalid hangup script\n");
388              return datalink_UpdateSet(d, r, w, e, n);
389          }
390          break;
391      }
392      break;
393
394    case DATALINK_READY:
395    case DATALINK_LCP:
396    case DATALINK_AUTH:
397    case DATALINK_CBCP:
398    case DATALINK_OPEN:
399      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
400               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
401      break;
402  }
403  return result;
404}
405
406int
407datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
408{
409  return physical_RemoveFromSet(dl->physical, r, w, e);
410}
411
412static int
413datalink_IsSet(struct descriptor *d, const fd_set *fdset)
414{
415  struct datalink *dl = descriptor2datalink(d);
416
417  switch (dl->state) {
418    case DATALINK_CLOSED:
419    case DATALINK_OPENING:
420      break;
421
422    case DATALINK_HANGUP:
423    case DATALINK_DIAL:
424    case DATALINK_LOGOUT:
425    case DATALINK_LOGIN:
426      return descriptor_IsSet(&dl->chat.desc, fdset);
427
428    case DATALINK_READY:
429    case DATALINK_LCP:
430    case DATALINK_AUTH:
431    case DATALINK_CBCP:
432    case DATALINK_OPEN:
433      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
434             descriptor_IsSet(&dl->physical->desc, fdset);
435  }
436  return 0;
437}
438
439static void
440datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
441{
442  struct datalink *dl = descriptor2datalink(d);
443
444  switch (dl->state) {
445    case DATALINK_CLOSED:
446    case DATALINK_OPENING:
447      break;
448
449    case DATALINK_HANGUP:
450    case DATALINK_DIAL:
451    case DATALINK_LOGOUT:
452    case DATALINK_LOGIN:
453      descriptor_Read(&dl->chat.desc, bundle, fdset);
454      break;
455
456    case DATALINK_READY:
457    case DATALINK_LCP:
458    case DATALINK_AUTH:
459    case DATALINK_CBCP:
460    case DATALINK_OPEN:
461      if (descriptor_IsSet(&dl->chap.desc, fdset))
462        descriptor_Read(&dl->chap.desc, bundle, fdset);
463      if (descriptor_IsSet(&dl->physical->desc, fdset))
464        descriptor_Read(&dl->physical->desc, bundle, fdset);
465      break;
466  }
467}
468
469static int
470datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
471{
472  struct datalink *dl = descriptor2datalink(d);
473  int result = 0;
474
475  switch (dl->state) {
476    case DATALINK_CLOSED:
477    case DATALINK_OPENING:
478      break;
479
480    case DATALINK_HANGUP:
481    case DATALINK_DIAL:
482    case DATALINK_LOGOUT:
483    case DATALINK_LOGIN:
484      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
485      break;
486
487    case DATALINK_READY:
488    case DATALINK_LCP:
489    case DATALINK_AUTH:
490    case DATALINK_CBCP:
491    case DATALINK_OPEN:
492      if (descriptor_IsSet(&dl->chap.desc, fdset))
493        result += descriptor_Write(&dl->chap.desc, bundle, fdset);
494      if (descriptor_IsSet(&dl->physical->desc, fdset))
495        result += descriptor_Write(&dl->physical->desc, bundle, fdset);
496      break;
497  }
498
499  return result;
500}
501
502static void
503datalink_ComeDown(struct datalink *dl, int how)
504{
505  if (how != CLOSE_NORMAL) {
506    dl->dial.tries = -1;
507    dl->reconnect_tries = 0;
508    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
509      dl->stayonline = 1;
510  }
511
512  if (dl->state >= DATALINK_READY && dl->stayonline) {
513    dl->stayonline = 0;
514    physical_StopDeviceTimer(dl->physical);
515    datalink_NewState(dl, DATALINK_READY);
516  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
517    physical_Offline(dl->physical);
518    if (dl->script.run && dl->state != DATALINK_OPENING) {
519      if (dl->state == DATALINK_LOGOUT) {
520        datalink_NewState(dl, DATALINK_HANGUP);
521        if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
522          log_Printf(LogWARN, "Invalid hangup script\n");
523      } else {
524        datalink_NewState(dl, DATALINK_LOGOUT);
525        if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
526          log_Printf(LogWARN, "Invalid logout script\n");
527      }
528    } else
529      datalink_HangupDone(dl);
530  }
531}
532
533static void
534datalink_LayerStart(void *v, struct fsm *fp)
535{
536  /* The given FSM is about to start up ! */
537  struct datalink *dl = (struct datalink *)v;
538
539  if (fp->proto == PROTO_LCP)
540    (*dl->parent->LayerStart)(dl->parent->object, fp);
541}
542
543static void
544datalink_LayerUp(void *v, struct fsm *fp)
545{
546  /* The given fsm is now up */
547  struct datalink *dl = (struct datalink *)v;
548  struct lcp *lcp = &dl->physical->link.lcp;
549
550  if (fp->proto == PROTO_LCP) {
551    datalink_GotAuthname(dl, "");
552    lcp->auth_ineed = lcp->want_auth;
553    lcp->auth_iwait = lcp->his_auth;
554    if (lcp->his_auth || lcp->want_auth) {
555      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
556        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
557      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
558                Auth2Nam(lcp->his_auth, lcp->his_authtype),
559                Auth2Nam(lcp->want_auth, lcp->want_authtype));
560      if (lcp->his_auth == PROTO_PAP)
561        auth_StartReq(&dl->pap);
562      if (lcp->want_auth == PROTO_CHAP)
563        auth_StartReq(&dl->chap.auth);
564    } else
565      datalink_AuthOk(dl);
566  }
567}
568
569static void
570datalink_AuthReInit(struct datalink *dl)
571{
572  auth_StopTimer(&dl->pap);
573  auth_StopTimer(&dl->chap.auth);
574  chap_ReInit(&dl->chap);
575}
576
577void
578datalink_GotAuthname(struct datalink *dl, const char *name)
579{
580  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
581  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
582}
583
584void
585datalink_NCPUp(struct datalink *dl)
586{
587  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
588
589  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
590    /* we've authenticated in multilink mode ! */
591    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
592      case MP_LINKSENT:
593        /* We've handed the link off to another ppp (well, we will soon) ! */
594        return;
595      case MP_UP:
596        /* First link in the bundle */
597        auth_Select(dl->bundle, dl->peer.authname);
598        bundle_CalculateBandwidth(dl->bundle);
599        /* fall through */
600      case MP_ADDED:
601        /* We're in multilink mode ! */
602        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
603        bundle_CalculateBandwidth(dl->bundle);
604        break;
605      case MP_FAILED:
606        datalink_AuthNotOk(dl);
607        return;
608    }
609  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
610    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
611    datalink_NewState(dl, DATALINK_OPEN);
612    bundle_CalculateBandwidth(dl->bundle);
613    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
614    return;
615  } else {
616    dl->bundle->ncp.mp.peer = dl->peer;
617    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
618    auth_Select(dl->bundle, dl->peer.authname);
619  }
620
621  if (ccpok) {
622    fsm_Up(&dl->physical->link.ccp.fsm);
623    fsm_Open(&dl->physical->link.ccp.fsm);
624  }
625  datalink_NewState(dl, DATALINK_OPEN);
626  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
627  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
628}
629
630void
631datalink_CBCPComplete(struct datalink *dl)
632{
633  datalink_NewState(dl, DATALINK_LCP);
634  datalink_AuthReInit(dl);
635  fsm_Close(&dl->physical->link.lcp.fsm);
636}
637
638void
639datalink_CBCPFailed(struct datalink *dl)
640{
641  cbcp_Down(&dl->cbcp);
642  datalink_CBCPComplete(dl);
643}
644
645void
646datalink_AuthOk(struct datalink *dl)
647{
648  if ((dl->physical->link.lcp.his_callback.opmask &
649       CALLBACK_BIT(CALLBACK_CBCP) ||
650       dl->physical->link.lcp.want_callback.opmask &
651       CALLBACK_BIT(CALLBACK_CBCP)) &&
652      !(dl->physical->link.lcp.want_callback.opmask &
653        CALLBACK_BIT(CALLBACK_AUTH))) {
654    /* We must have agreed CBCP if AUTH isn't there any more */
655    datalink_NewState(dl, DATALINK_CBCP);
656    cbcp_Up(&dl->cbcp);
657  } else if (dl->physical->link.lcp.want_callback.opmask) {
658    /* It's not CBCP */
659    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
660    datalink_NewState(dl, DATALINK_LCP);
661    datalink_AuthReInit(dl);
662    fsm_Close(&dl->physical->link.lcp.fsm);
663  } else
664    switch (dl->physical->link.lcp.his_callback.opmask) {
665      case 0:
666        datalink_NCPUp(dl);
667        break;
668
669      case CALLBACK_BIT(CALLBACK_AUTH):
670        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
671                          sizeof dl->cbcp.fsm.phone);
672        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
673          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
674                     dl->peer.authname);
675          *dl->cbcp.fsm.phone = '\0';
676        } else {
677          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
678          if (ptr)
679            *ptr = '\0';	/* Call back on the first number */
680          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
681                     dl->cbcp.fsm.phone);
682          dl->cbcp.required = 1;
683        }
684        dl->cbcp.fsm.delay = 0;
685        datalink_NewState(dl, DATALINK_LCP);
686        datalink_AuthReInit(dl);
687        fsm_Close(&dl->physical->link.lcp.fsm);
688        break;
689
690      case CALLBACK_BIT(CALLBACK_E164):
691        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
692                sizeof dl->cbcp.fsm.phone - 1);
693        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
694        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
695                   dl->cbcp.fsm.phone);
696        dl->cbcp.required = 1;
697        dl->cbcp.fsm.delay = 0;
698        datalink_NewState(dl, DATALINK_LCP);
699        datalink_AuthReInit(dl);
700        fsm_Close(&dl->physical->link.lcp.fsm);
701        break;
702
703      default:
704        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
705                   dl->name);
706        datalink_NewState(dl, DATALINK_LCP);
707        datalink_AuthReInit(dl);
708        fsm_Close(&dl->physical->link.lcp.fsm);
709        break;
710    }
711}
712
713void
714datalink_AuthNotOk(struct datalink *dl)
715{
716  datalink_NewState(dl, DATALINK_LCP);
717  datalink_AuthReInit(dl);
718  fsm_Close(&dl->physical->link.lcp.fsm);
719}
720
721static void
722datalink_LayerDown(void *v, struct fsm *fp)
723{
724  /* The given FSM has been told to come down */
725  struct datalink *dl = (struct datalink *)v;
726
727  if (fp->proto == PROTO_LCP) {
728    switch (dl->state) {
729      case DATALINK_OPEN:
730        peerid_Init(&dl->peer);
731        fsm2initial(&dl->physical->link.ccp.fsm);
732        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
733        (*dl->parent->LayerDown)(dl->parent->object, fp);
734        /* fall through (just in case) */
735
736      case DATALINK_CBCP:
737        if (!dl->cbcp.required)
738          cbcp_Down(&dl->cbcp);
739        /* fall through (just in case) */
740
741      case DATALINK_AUTH:
742        timer_Stop(&dl->pap.authtimer);
743        timer_Stop(&dl->chap.auth.authtimer);
744    }
745    datalink_NewState(dl, DATALINK_LCP);
746    datalink_AuthReInit(dl);
747  }
748}
749
750static void
751datalink_LayerFinish(void *v, struct fsm *fp)
752{
753  /* The given fsm is now down */
754  struct datalink *dl = (struct datalink *)v;
755
756  if (fp->proto == PROTO_LCP) {
757    fsm2initial(fp);
758    (*dl->parent->LayerFinish)(dl->parent->object, fp);
759    datalink_ComeDown(dl, CLOSE_NORMAL);
760  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
761    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
762}
763
764struct datalink *
765datalink_Create(const char *name, struct bundle *bundle, int type)
766{
767  struct datalink *dl;
768
769  dl = (struct datalink *)malloc(sizeof(struct datalink));
770  if (dl == NULL)
771    return dl;
772
773  dl->desc.type = DATALINK_DESCRIPTOR;
774  dl->desc.UpdateSet = datalink_UpdateSet;
775  dl->desc.IsSet = datalink_IsSet;
776  dl->desc.Read = datalink_Read;
777  dl->desc.Write = datalink_Write;
778
779  dl->state = DATALINK_CLOSED;
780
781  *dl->cfg.script.dial = '\0';
782  *dl->cfg.script.login = '\0';
783  *dl->cfg.script.logout = '\0';
784  *dl->cfg.script.hangup = '\0';
785  *dl->cfg.phone.list = '\0';
786  *dl->phone.list = '\0';
787  dl->phone.next = NULL;
788  dl->phone.alt = NULL;
789  dl->phone.chosen = "N/A";
790  dl->stayonline = 0;
791  dl->script.run = 1;
792  dl->script.packetmode = 1;
793  mp_linkInit(&dl->mp);
794
795  dl->bundle = bundle;
796  dl->next = NULL;
797
798  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
799
800  dl->dial.tries = 0;
801  dl->cfg.dial.max = 1;
802  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
803  dl->cfg.dial.timeout = DIAL_TIMEOUT;
804  dl->cfg.dial.inc = 0;
805  dl->cfg.dial.maxinc = 10;
806
807  dl->reconnect_tries = 0;
808  dl->cfg.reconnect.max = 0;
809  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
810
811  dl->cfg.callback.opmask = 0;
812  dl->cfg.cbcp.delay = 0;
813  *dl->cfg.cbcp.phone = '\0';
814  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
815
816  dl->name = strdup(name);
817  peerid_Init(&dl->peer);
818  dl->parent = &bundle->fsm;
819  dl->fsmp.LayerStart = datalink_LayerStart;
820  dl->fsmp.LayerUp = datalink_LayerUp;
821  dl->fsmp.LayerDown = datalink_LayerDown;
822  dl->fsmp.LayerFinish = datalink_LayerFinish;
823  dl->fsmp.object = dl;
824
825  if ((dl->physical = physical_Create(dl, type)) == NULL) {
826    free(dl->name);
827    free(dl);
828    return NULL;
829  }
830
831  pap_Init(&dl->pap, dl->physical);
832  chap_Init(&dl->chap, dl->physical);
833  cbcp_Init(&dl->cbcp, dl->physical);
834
835  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
836  chat_Init(&dl->chat, dl->physical);
837
838  log_Printf(LogPHASE, "%s: Created in %s state\n",
839             dl->name, datalink_State(dl));
840
841  return dl;
842}
843
844struct datalink *
845datalink_Clone(struct datalink *odl, const char *name)
846{
847  struct datalink *dl;
848
849  dl = (struct datalink *)malloc(sizeof(struct datalink));
850  if (dl == NULL)
851    return dl;
852
853  dl->desc.type = DATALINK_DESCRIPTOR;
854  dl->desc.UpdateSet = datalink_UpdateSet;
855  dl->desc.IsSet = datalink_IsSet;
856  dl->desc.Read = datalink_Read;
857  dl->desc.Write = datalink_Write;
858
859  dl->state = DATALINK_CLOSED;
860
861  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
862  mp_linkInit(&dl->mp);
863  *dl->phone.list = '\0';
864  dl->phone.next = NULL;
865  dl->phone.alt = NULL;
866  dl->phone.chosen = "N/A";
867  dl->bundle = odl->bundle;
868  dl->next = NULL;
869  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
870  dl->dial.tries = 0;
871  dl->reconnect_tries = 0;
872  dl->name = strdup(name);
873  peerid_Init(&dl->peer);
874  dl->parent = odl->parent;
875  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
876  dl->fsmp.object = dl;
877
878  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
879    free(dl->name);
880    free(dl);
881    return NULL;
882  }
883  pap_Init(&dl->pap, dl->physical);
884  dl->pap.cfg = odl->pap.cfg;
885
886  chap_Init(&dl->chap, dl->physical);
887  dl->chap.auth.cfg = odl->chap.auth.cfg;
888
889  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
890  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
891         sizeof dl->physical->link.lcp.cfg);
892  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
893         sizeof dl->physical->link.ccp.cfg);
894  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
895         sizeof dl->physical->async.cfg);
896
897  cbcp_Init(&dl->cbcp, dl->physical);
898
899  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
900  chat_Init(&dl->chat, dl->physical);
901
902  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
903             dl->name, datalink_State(dl));
904
905  return dl;
906}
907
908struct datalink *
909datalink_Destroy(struct datalink *dl)
910{
911  struct datalink *result;
912
913  if (dl->state != DATALINK_CLOSED) {
914    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
915              datalink_State(dl));
916    switch (dl->state) {
917      case DATALINK_HANGUP:
918      case DATALINK_DIAL:
919      case DATALINK_LOGIN:
920        chat_Finish(&dl->chat);		/* Gotta blat the timers ! */
921        break;
922    }
923  }
924
925  chat_Destroy(&dl->chat);
926  timer_Stop(&dl->dial.timer);
927  result = dl->next;
928  physical_Destroy(dl->physical);
929  free(dl->name);
930  free(dl);
931
932  return result;
933}
934
935void
936datalink_Up(struct datalink *dl, int runscripts, int packetmode)
937{
938  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
939    /* Ignore scripts */
940    runscripts = 0;
941
942  switch (dl->state) {
943    case DATALINK_CLOSED:
944      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
945          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
946        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
947      datalink_NewState(dl, DATALINK_OPENING);
948      dl->reconnect_tries =
949        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
950      dl->dial.tries = dl->cfg.dial.max;
951      dl->script.run = runscripts;
952      dl->script.packetmode = packetmode;
953      break;
954
955    case DATALINK_OPENING:
956      if (!dl->script.run && runscripts)
957        dl->script.run = 1;
958      /* fall through */
959
960    case DATALINK_DIAL:
961    case DATALINK_LOGIN:
962    case DATALINK_READY:
963      if (!dl->script.packetmode && packetmode) {
964        dl->script.packetmode = 1;
965        if (dl->state == DATALINK_READY)
966          datalink_LoginDone(dl);
967      }
968      break;
969  }
970}
971
972void
973datalink_Close(struct datalink *dl, int how)
974{
975  /* Please close */
976  switch (dl->state) {
977    case DATALINK_OPEN:
978      peerid_Init(&dl->peer);
979      fsm2initial(&dl->physical->link.ccp.fsm);
980      /* fall through */
981
982    case DATALINK_CBCP:
983    case DATALINK_AUTH:
984    case DATALINK_LCP:
985      datalink_AuthReInit(dl);
986      fsm_Close(&dl->physical->link.lcp.fsm);
987      if (how != CLOSE_NORMAL) {
988        dl->dial.tries = -1;
989        dl->reconnect_tries = 0;
990        if (how == CLOSE_LCP)
991          dl->stayonline = 1;
992      }
993      break;
994
995    default:
996      datalink_ComeDown(dl, how);
997  }
998}
999
1000void
1001datalink_Down(struct datalink *dl, int how)
1002{
1003  /* Carrier is lost */
1004  switch (dl->state) {
1005    case DATALINK_OPEN:
1006      peerid_Init(&dl->peer);
1007      fsm2initial(&dl->physical->link.ccp.fsm);
1008      /* fall through */
1009
1010    case DATALINK_CBCP:
1011    case DATALINK_AUTH:
1012    case DATALINK_LCP:
1013      fsm2initial(&dl->physical->link.lcp.fsm);
1014      if (dl->state == DATALINK_OPENING)
1015        return;			/* we're doing a callback... */
1016      /* fall through */
1017
1018    default:
1019      datalink_ComeDown(dl, how);
1020  }
1021}
1022
1023void
1024datalink_StayDown(struct datalink *dl)
1025{
1026  dl->reconnect_tries = 0;
1027}
1028
1029void
1030datalink_DontHangup(struct datalink *dl)
1031{
1032  if (dl->state >= DATALINK_LCP)
1033    dl->stayonline = 1;
1034}
1035
1036int
1037datalink_Show(struct cmdargs const *arg)
1038{
1039  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1040  prompt_Printf(arg->prompt, " State:              %s\n",
1041                datalink_State(arg->cx));
1042  prompt_Printf(arg->prompt, " Peer name:          ");
1043  if (*arg->cx->peer.authname)
1044    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1045  else if (arg->cx->state == DATALINK_OPEN)
1046    prompt_Printf(arg->prompt, "None requested\n");
1047  else
1048    prompt_Printf(arg->prompt, "N/A\n");
1049  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1050                mp_Enddisc(arg->cx->peer.enddisc.class,
1051                           arg->cx->peer.enddisc.address,
1052                           arg->cx->peer.enddisc.len));
1053
1054  prompt_Printf(arg->prompt, "\nDefaults:\n");
1055  prompt_Printf(arg->prompt, " Phone List:         %s\n",
1056                arg->cx->cfg.phone.list);
1057  if (arg->cx->cfg.dial.max)
1058    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1059                  arg->cx->cfg.dial.max);
1060  else
1061    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1062  if (arg->cx->cfg.dial.next_timeout >= 0)
1063    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1064  else
1065    prompt_Printf(arg->prompt, "random/");
1066  if (arg->cx->cfg.dial.timeout >= 0)
1067    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1068  else
1069    prompt_Printf(arg->prompt, "random\n");
1070  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1071                arg->cx->cfg.reconnect.max);
1072  if (arg->cx->cfg.reconnect.timeout > 0)
1073    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1074  else
1075    prompt_Printf(arg->prompt, "random\n");
1076  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1077                PHYS_DIRECT ?  "accepted: " : "requested:");
1078  if (!arg->cx->cfg.callback.opmask)
1079    prompt_Printf(arg->prompt, "none\n");
1080  else {
1081    int comma = 0;
1082
1083    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1084      prompt_Printf(arg->prompt, "none");
1085      comma = 1;
1086    }
1087    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1088      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1089      comma = 1;
1090    }
1091    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1092      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1093      if (arg->cx->physical->type != PHYS_DIRECT)
1094        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1095      comma = 1;
1096    }
1097    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1098      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1099      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1100                    arg->cx->cfg.cbcp.delay);
1101      prompt_Printf(arg->prompt, "                     phone: ");
1102      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1103        if (arg->cx->physical->type & PHYS_DIRECT)
1104          prompt_Printf(arg->prompt, "Caller decides\n");
1105        else
1106          prompt_Printf(arg->prompt, "Dialback server decides\n");
1107      } else
1108        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1109      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1110                    arg->cx->cfg.cbcp.fsmretry);
1111    } else
1112      prompt_Printf(arg->prompt, "\n");
1113  }
1114
1115  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1116                arg->cx->cfg.script.dial);
1117  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1118                arg->cx->cfg.script.login);
1119  prompt_Printf(arg->prompt, " Logout Script:      %s\n",
1120                arg->cx->cfg.script.logout);
1121  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1122                arg->cx->cfg.script.hangup);
1123  return 0;
1124}
1125
1126int
1127datalink_SetReconnect(struct cmdargs const *arg)
1128{
1129  if (arg->argc == arg->argn+2) {
1130    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1131    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1132    return 0;
1133  }
1134  return -1;
1135}
1136
1137int
1138datalink_SetRedial(struct cmdargs const *arg)
1139{
1140  const char *sep, *osep;
1141  int timeout, inc, maxinc, tries;
1142
1143  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1144    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1145	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1146      arg->cx->cfg.dial.timeout = -1;
1147      randinit();
1148    } else {
1149      timeout = atoi(arg->argv[arg->argn]);
1150
1151      if (timeout >= 0)
1152	arg->cx->cfg.dial.timeout = timeout;
1153      else {
1154	log_Printf(LogWARN, "Invalid redial timeout\n");
1155	return -1;
1156      }
1157    }
1158
1159    sep = strchr(arg->argv[arg->argn], '+');
1160    if (sep) {
1161      inc = atoi(++sep);
1162      osep = sep;
1163      if (inc >= 0)
1164        arg->cx->cfg.dial.inc = inc;
1165      else {
1166        log_Printf(LogWARN, "Invalid timeout increment\n");
1167        return -1;
1168      }
1169      sep = strchr(sep, '-');
1170      if (sep) {
1171        maxinc = atoi(++sep);
1172        if (maxinc >= 0)
1173          arg->cx->cfg.dial.maxinc = maxinc;
1174        else {
1175          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1176          return -1;
1177        }
1178      } else {
1179        /* Default timeout increment */
1180        arg->cx->cfg.dial.maxinc = 10;
1181        sep = osep;
1182      }
1183    } else {
1184      /* Default timeout increment & max increment */
1185      arg->cx->cfg.dial.inc = 0;
1186      arg->cx->cfg.dial.maxinc = 10;
1187      sep = arg->argv[arg->argn];
1188    }
1189
1190    sep = strchr(sep, '.');
1191    if (sep) {
1192      if (strcasecmp(++sep, "random") == 0) {
1193	arg->cx->cfg.dial.next_timeout = -1;
1194	randinit();
1195      } else {
1196	timeout = atoi(sep);
1197	if (timeout >= 0)
1198	  arg->cx->cfg.dial.next_timeout = timeout;
1199	else {
1200	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1201	  return -1;
1202	}
1203      }
1204    } else
1205      /* Default next timeout */
1206      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1207
1208    if (arg->argc == arg->argn+2) {
1209      tries = atoi(arg->argv[arg->argn+1]);
1210
1211      if (tries >= 0) {
1212	arg->cx->cfg.dial.max = tries;
1213      } else {
1214	log_Printf(LogWARN, "Invalid retry value\n");
1215	return 1;
1216      }
1217    }
1218    return 0;
1219  }
1220
1221  return -1;
1222}
1223
1224static const char * const states[] = {
1225  "closed",
1226  "opening",
1227  "hangup",
1228  "dial",
1229  "carrier",
1230  "logout",
1231  "login",
1232  "ready",
1233  "lcp",
1234  "auth",
1235  "cbcp",
1236  "open"
1237};
1238
1239const char *
1240datalink_State(struct datalink *dl)
1241{
1242  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1243    return "unknown";
1244  return states[dl->state];
1245}
1246
1247static void
1248datalink_NewState(struct datalink *dl, int state)
1249{
1250  if (state != dl->state) {
1251    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1252      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1253                 states[state]);
1254      dl->state = state;
1255    } else
1256      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1257  }
1258}
1259
1260struct datalink *
1261iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1262             int fd, int *auxfd, int *nauxfd)
1263{
1264  struct datalink *dl, *cdl;
1265  struct fsm_retry copy;
1266  char *oname;
1267
1268  dl = (struct datalink *)iov[(*niov)++].iov_base;
1269  dl->name = iov[*niov].iov_base;
1270
1271  if (dl->name[DATALINK_MAXNAME-1]) {
1272    dl->name[DATALINK_MAXNAME-1] = '\0';
1273    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1274      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1275  }
1276
1277  /* Make sure the name is unique ! */
1278  oname = NULL;
1279  do {
1280    for (cdl = bundle->links; cdl; cdl = cdl->next)
1281      if (!strcasecmp(dl->name, cdl->name)) {
1282        if (oname)
1283          free(datalink_NextName(dl));
1284        else
1285          oname = datalink_NextName(dl);
1286        break;	/* Keep renaming 'till we have no conflicts */
1287      }
1288  } while (cdl);
1289
1290  if (oname) {
1291    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1292    free(oname);
1293  } else {
1294    dl->name = strdup(dl->name);
1295    free(iov[*niov].iov_base);
1296  }
1297  (*niov)++;
1298
1299  dl->desc.type = DATALINK_DESCRIPTOR;
1300  dl->desc.UpdateSet = datalink_UpdateSet;
1301  dl->desc.IsSet = datalink_IsSet;
1302  dl->desc.Read = datalink_Read;
1303  dl->desc.Write = datalink_Write;
1304
1305  mp_linkInit(&dl->mp);
1306  *dl->phone.list = '\0';
1307  dl->phone.next = NULL;
1308  dl->phone.alt = NULL;
1309  dl->phone.chosen = "N/A";
1310
1311  dl->bundle = bundle;
1312  dl->next = NULL;
1313  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1314  dl->dial.tries = 0;
1315  dl->reconnect_tries = 0;
1316  dl->parent = &bundle->fsm;
1317  dl->fsmp.LayerStart = datalink_LayerStart;
1318  dl->fsmp.LayerUp = datalink_LayerUp;
1319  dl->fsmp.LayerDown = datalink_LayerDown;
1320  dl->fsmp.LayerFinish = datalink_LayerFinish;
1321  dl->fsmp.object = dl;
1322
1323  dl->physical = iov2physical(dl, iov, niov, maxiov, fd, auxfd, nauxfd);
1324
1325  if (!dl->physical) {
1326    free(dl->name);
1327    free(dl);
1328    dl = NULL;
1329  } else {
1330    copy = dl->pap.cfg.fsm;
1331    pap_Init(&dl->pap, dl->physical);
1332    dl->pap.cfg.fsm = copy;
1333
1334    copy = dl->chap.auth.cfg.fsm;
1335    chap_Init(&dl->chap, dl->physical);
1336    dl->chap.auth.cfg.fsm = copy;
1337
1338    cbcp_Init(&dl->cbcp, dl->physical);
1339
1340    memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
1341    chat_Init(&dl->chat, dl->physical);
1342
1343    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1344              dl->name, datalink_State(dl));
1345  }
1346
1347  return dl;
1348}
1349
1350int
1351datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1352             int *auxfd, int *nauxfd)
1353{
1354  /* If `dl' is NULL, we're allocating before a Fromiov() */
1355  int link_fd;
1356
1357  if (dl) {
1358    timer_Stop(&dl->dial.timer);
1359    /* The following is purely for the sake of paranoia */
1360    cbcp_Down(&dl->cbcp);
1361    timer_Stop(&dl->pap.authtimer);
1362    timer_Stop(&dl->chap.auth.authtimer);
1363  }
1364
1365  if (*niov >= maxiov - 1) {
1366    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1367    if (dl) {
1368      free(dl->name);
1369      free(dl);
1370    }
1371    return -1;
1372  }
1373
1374  iov[*niov].iov_base = (void *)dl;
1375  iov[(*niov)++].iov_len = sizeof *dl;
1376  iov[*niov].iov_base = dl ? realloc(dl->name, DATALINK_MAXNAME) : NULL;
1377  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1378
1379  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, auxfd,
1380                         nauxfd);
1381
1382  if (link_fd == -1 && dl) {
1383    free(dl->name);
1384    free(dl);
1385  }
1386
1387  return link_fd;
1388}
1389
1390void
1391datalink_Rename(struct datalink *dl, const char *name)
1392{
1393  free(dl->name);
1394  dl->physical->link.name = dl->name = strdup(name);
1395}
1396
1397char *
1398datalink_NextName(struct datalink *dl)
1399{
1400  int f, n;
1401  char *name, *oname;
1402
1403  n = strlen(dl->name);
1404  name = (char *)malloc(n+3);
1405  for (f = n - 1; f >= 0; f--)
1406    if (!isdigit(dl->name[f]))
1407      break;
1408  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1409  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1410  oname = dl->name;
1411  dl->name = name;
1412  /* our physical link name isn't updated (it probably isn't created yet) */
1413  return oname;
1414}
1415
1416int
1417datalink_SetMode(struct datalink *dl, int mode)
1418{
1419  if (!physical_SetMode(dl->physical, mode))
1420    return 0;
1421  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1422    dl->script.run = 0;
1423  if (dl->physical->type == PHYS_DIRECT)
1424    dl->reconnect_tries = 0;
1425  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND|PHYS_FOREGROUND) &&
1426      dl->state <= DATALINK_READY)
1427    datalink_Up(dl, 1, 1);
1428  return 1;
1429}
1430
1431int
1432datalink_GetDialTimeout(struct datalink *dl)
1433{
1434  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1435
1436  if (dl->dial.incs < dl->cfg.dial.maxinc)
1437    dl->dial.incs++;
1438
1439  return result;
1440}
1441