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: src/usr.sbin/ppp/datalink.c,v 1.77.26.1 2010/12/21 17:10:29 kensmith Exp $
27 */
28
29#include <sys/param.h>
30#include <netinet/in.h>
31#include <netinet/in_systm.h>
32#include <netinet/ip.h>
33#include <sys/socket.h>
34#include <sys/un.h>
35
36#include <ctype.h>
37#include <stdarg.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <sys/uio.h>
42#include <termios.h>
43
44#include "layer.h"
45#include "mbuf.h"
46#include "log.h"
47#include "defs.h"
48#include "timer.h"
49#include "fsm.h"
50#include "descriptor.h"
51#include "lqr.h"
52#include "hdlc.h"
53#include "lcp.h"
54#include "async.h"
55#include "throughput.h"
56#include "ccp.h"
57#include "link.h"
58#include "physical.h"
59#include "iplist.h"
60#include "slcompress.h"
61#include "ncpaddr.h"
62#include "ipcp.h"
63#include "filter.h"
64#include "mp.h"
65#ifndef NORADIUS
66#include "radius.h"
67#endif
68#include "ipv6cp.h"
69#include "ncp.h"
70#include "bundle.h"
71#include "chat.h"
72#include "auth.h"
73#include "prompt.h"
74#include "proto.h"
75#include "pap.h"
76#include "chap.h"
77#include "command.h"
78#include "cbcp.h"
79#include "datalink.h"
80
81static void datalink_LoginDone(struct datalink *);
82static void datalink_NewState(struct datalink *, unsigned);
83static char *datalink_NextName(struct datalink *);
84
85static void
86datalink_OpenTimeout(void *v)
87{
88  struct datalink *dl = (struct datalink *)v;
89
90  timer_Stop(&dl->dial.timer);
91  if (dl->state == DATALINK_OPENING)
92    log_Printf(LogCHAT, "%s: Redial timer expired.\n", dl->name);
93}
94
95static int
96datalink_StartDialTimer(struct datalink *dl, int Timeout)
97{
98  int result = Timeout;
99
100  timer_Stop(&dl->dial.timer);
101  if (Timeout < 0)
102    result = (random() % DIAL_TIMEOUT) + 1;
103  dl->dial.timer.load = result ? result * SECTICKS : 1;
104  dl->dial.timer.func = datalink_OpenTimeout;
105  dl->dial.timer.name = "dial";
106  dl->dial.timer.arg = dl;
107  timer_Start(&dl->dial.timer);
108  if (dl->state == DATALINK_OPENING)
109    log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
110               dl->name, result);
111  return result;
112}
113
114static void
115datalink_HangupDone(struct datalink *dl)
116{
117  if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
118      dl->physical->fd != -1) {
119    /* Don't close our device if the link is dedicated */
120    datalink_LoginDone(dl);
121    return;
122  }
123
124  chat_Finish(&dl->chat);
125  physical_Close(dl->physical);
126  dl->phone.chosen = "N/A";
127
128  if (dl->cbcp.required) {
129    log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
130    dl->cfg.callback.opmask = 0;
131    strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
132            sizeof dl->cfg.phone.list - 1);
133    dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
134    dl->phone.alt = dl->phone.next = NULL;
135    dl->reconnect_tries = dl->cfg.reconnect.max;
136    dl->dial.tries = dl->cfg.dial.max;
137    dl->dial.incs = 0;
138    dl->script.run = 1;
139    dl->script.packetmode = 1;
140    if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
141      log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
142    bundle_LinksRemoved(dl->bundle);
143    /* if dial.timeout is < 0 (random), we don't override fsm.delay */
144    if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
145      dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
146    datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
147    cbcp_Down(&dl->cbcp);
148    datalink_NewState(dl, DATALINK_OPENING);
149    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
150        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
151      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
152  } else if (dl->bundle->CleaningUp ||
153      (dl->physical->type == PHYS_DIRECT) ||
154      ((!dl->dial.tries || (dl->dial.tries < 0 && !dl->reconnect_tries)) &&
155       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
156    datalink_NewState(dl, DATALINK_CLOSED);
157    dl->dial.tries = -1;
158    dl->dial.incs = 0;
159    dl->reconnect_tries = 0;
160    bundle_LinkClosed(dl->bundle, dl);
161    if (!dl->bundle->CleaningUp &&
162        !(dl->physical->type & (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)))
163      datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
164  } else {
165    datalink_NewState(dl, DATALINK_OPENING);
166    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
167        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
168      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
169    if (dl->dial.tries < 0) {
170      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
171      dl->dial.tries = dl->cfg.dial.max;
172      dl->dial.incs = 0;
173      dl->reconnect_tries--;
174      log_Printf(LogCHAT, "%s: Reconnect try %d of %d\n",
175                 dl->name, dl->cfg.reconnect.max - dl->reconnect_tries,
176                 dl->cfg.reconnect.max);
177      bundle_Notify(dl->bundle, EX_RECONNECT);
178    } else {
179      if (dl->phone.next == NULL)
180        datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
181      else
182        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
183      bundle_Notify(dl->bundle, EX_REDIAL);
184    }
185  }
186}
187
188const char *
189datalink_ChoosePhoneNumber(struct datalink *dl)
190{
191  char *phone;
192
193  if (dl->phone.alt == NULL) {
194    if (dl->phone.next == NULL) {
195      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
196      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
197      if (*dl->phone.list == '\0')
198        return "";
199      dl->phone.next = dl->phone.list;
200    }
201    dl->phone.alt = strsep(&dl->phone.next, ":");
202  }
203  phone = strsep(&dl->phone.alt, "|");
204  dl->phone.chosen = *phone ? phone : "[NONE]";
205  if (*phone)
206    log_Printf(LogCHAT, "Phone: %s\n", phone);
207  return phone;
208}
209
210static void
211datalink_LoginDone(struct datalink *dl)
212{
213  chat_Finish(&dl->chat);
214
215  if (!dl->script.packetmode) {
216    dl->dial.tries = -1;
217    dl->dial.incs = 0;
218    datalink_NewState(dl, DATALINK_READY);
219  } else if (!physical_Raw(dl->physical)) {
220    dl->dial.tries = 0;
221    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
222    if (dl->script.run) {
223      datalink_NewState(dl, DATALINK_LOGOUT);
224      if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
225        log_Printf(LogWARN, "Invalid logout script\n");
226    } else {
227      physical_StopDeviceTimer(dl->physical);
228      if (dl->physical->type == PHYS_DEDICATED)
229        /* force a redial timeout */
230        physical_Close(dl->physical);
231      datalink_HangupDone(dl);
232    }
233  } else {
234    dl->dial.tries = -1;
235    dl->dial.incs = 0;
236
237    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
238    async_Setup(&dl->physical->async);
239
240    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
241              0 : dl->physical->link.lcp.cfg.openmode);
242    ccp_Setup(&dl->physical->link.ccp);
243
244    datalink_NewState(dl, DATALINK_LCP);
245    fsm_Up(&dl->physical->link.lcp.fsm);
246    fsm_Open(&dl->physical->link.lcp.fsm);
247  }
248}
249
250static int
251datalink_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
252                   int *n)
253{
254  struct datalink *dl = descriptor2datalink(d);
255  int result;
256
257  result = 0;
258  switch (dl->state) {
259    case DATALINK_CLOSED:
260      if ((dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|
261                                 PHYS_FOREGROUND|PHYS_DDIAL)) &&
262          !dl->bundle->CleaningUp)
263        /*
264         * Our first time in - DEDICATED & DDIAL never come down, and
265         * DIRECT, FOREGROUND & BACKGROUND get deleted when they enter
266         * DATALINK_CLOSED.  Go to DATALINK_OPENING via datalink_Up()
267         * and fall through.
268         */
269        datalink_Up(dl, 1, 1);
270      else
271        break;
272      /* FALLTHROUGH */
273
274    case DATALINK_OPENING:
275      if (dl->dial.timer.state != TIMER_RUNNING) {
276        if (--dl->dial.tries < 0)
277          dl->dial.tries = 0;
278        if (physical_Open(dl->physical) >= 0) {
279          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
280                           "Type `~?' for help\r\n", dl->name,
281                           dl->physical->name.full);
282          if (dl->script.run) {
283            datalink_NewState(dl, DATALINK_DIAL);
284            if (!chat_Setup(&dl->chat, dl->cfg.script.dial,
285                            *dl->cfg.script.dial ?
286                            datalink_ChoosePhoneNumber(dl) : ""))
287              log_Printf(LogWARN, "Invalid dial script\n");
288            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
289                dl->cfg.dial.max)
290              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
291                        dl->name, dl->cfg.dial.max - dl->dial.tries,
292                        dl->cfg.dial.max);
293          } else
294            datalink_NewState(dl, DATALINK_CARRIER);
295          return datalink_UpdateSet(d, r, w, e, n);
296        } else {
297          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
298              dl->cfg.dial.max)
299            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
300                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
301          else
302            log_Printf(LogCHAT, "Failed to open device\n");
303
304          if (dl->bundle->CleaningUp ||
305              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
306               dl->cfg.dial.max && dl->dial.tries == 0)) {
307            datalink_NewState(dl, DATALINK_CLOSED);
308            dl->reconnect_tries = 0;
309            dl->dial.tries = -1;
310            log_WritePrompts(dl, "Failed to open %s\n",
311                             dl->physical->name.full);
312            bundle_LinkClosed(dl->bundle, dl);
313          }
314          if (!dl->bundle->CleaningUp) {
315            int timeout;
316
317            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
318            bundle_Notify(dl->bundle, EX_REDIAL);
319            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
320                             dl->physical->name.full, timeout);
321          }
322        }
323      }
324      break;
325
326    case DATALINK_CARRIER:
327      /* Wait for carrier on the device */
328      switch (physical_AwaitCarrier(dl->physical)) {
329        case CARRIER_PENDING:
330          log_Printf(LogDEBUG, "Waiting for carrier\n");
331          return 0;	/* A device timer is running to wake us up again */
332
333        case CARRIER_OK:
334          if (dl->script.run) {
335            datalink_NewState(dl, DATALINK_LOGIN);
336            if (!chat_Setup(&dl->chat, dl->cfg.script.login, NULL))
337              log_Printf(LogWARN, "Invalid login script\n");
338          } else
339            datalink_LoginDone(dl);
340          return datalink_UpdateSet(d, r, w, e, n);
341
342        case CARRIER_LOST:
343          physical_Offline(dl->physical);	/* Is this required ? */
344          if (dl->script.run) {
345            datalink_NewState(dl, DATALINK_HANGUP);
346            if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
347              log_Printf(LogWARN, "Invalid hangup script\n");
348            return datalink_UpdateSet(d, r, w, e, n);
349          } else {
350            datalink_HangupDone(dl);
351            return 0;	/* Maybe bundle_CleanDatalinks() has something to do */
352          }
353      }
354
355    case DATALINK_HANGUP:
356    case DATALINK_DIAL:
357    case DATALINK_LOGOUT:
358    case DATALINK_LOGIN:
359      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
360      switch (dl->chat.state) {
361        case CHAT_DONE:
362          /* script succeeded */
363          switch(dl->state) {
364            case DATALINK_HANGUP:
365              datalink_HangupDone(dl);
366              break;
367            case DATALINK_DIAL:
368              datalink_NewState(dl, DATALINK_CARRIER);
369              return datalink_UpdateSet(d, r, w, e, n);
370            case DATALINK_LOGOUT:
371              datalink_NewState(dl, DATALINK_HANGUP);
372              physical_Offline(dl->physical);
373              if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
374                log_Printf(LogWARN, "Invalid hangup script\n");
375              return datalink_UpdateSet(d, r, w, e, n);
376            case DATALINK_LOGIN:
377              dl->phone.alt = NULL;
378              datalink_LoginDone(dl);
379              return datalink_UpdateSet(d, r, w, e, n);
380          }
381          break;
382        case CHAT_FAILED:
383          /* Going down - script failed */
384          log_Printf(LogWARN, "Chat script failed\n");
385          switch(dl->state) {
386            case DATALINK_HANGUP:
387              datalink_HangupDone(dl);
388              break;
389            case DATALINK_DIAL:
390            case DATALINK_LOGOUT:
391            case DATALINK_LOGIN:
392              datalink_NewState(dl, DATALINK_HANGUP);
393              physical_Offline(dl->physical);
394              if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
395                log_Printf(LogWARN, "Invalid hangup script\n");
396              return datalink_UpdateSet(d, r, w, e, n);
397          }
398          break;
399      }
400      break;
401
402    case DATALINK_READY:
403    case DATALINK_LCP:
404    case DATALINK_AUTH:
405    case DATALINK_CBCP:
406    case DATALINK_OPEN:
407      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
408               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
409      break;
410  }
411  return result;
412}
413
414int
415datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
416{
417  return physical_RemoveFromSet(dl->physical, r, w, e);
418}
419
420static int
421datalink_IsSet(struct fdescriptor *d, const fd_set *fdset)
422{
423  struct datalink *dl = descriptor2datalink(d);
424
425  switch (dl->state) {
426    case DATALINK_CLOSED:
427    case DATALINK_OPENING:
428      break;
429
430    case DATALINK_HANGUP:
431    case DATALINK_DIAL:
432    case DATALINK_LOGOUT:
433    case DATALINK_LOGIN:
434      return descriptor_IsSet(&dl->chat.desc, fdset);
435
436    case DATALINK_READY:
437    case DATALINK_LCP:
438    case DATALINK_AUTH:
439    case DATALINK_CBCP:
440    case DATALINK_OPEN:
441      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
442             descriptor_IsSet(&dl->physical->desc, fdset);
443  }
444  return 0;
445}
446
447static void
448datalink_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
449{
450  struct datalink *dl = descriptor2datalink(d);
451
452  switch (dl->state) {
453    case DATALINK_CLOSED:
454    case DATALINK_OPENING:
455      break;
456
457    case DATALINK_HANGUP:
458    case DATALINK_DIAL:
459    case DATALINK_LOGOUT:
460    case DATALINK_LOGIN:
461      descriptor_Read(&dl->chat.desc, bundle, fdset);
462      break;
463
464    case DATALINK_READY:
465    case DATALINK_LCP:
466    case DATALINK_AUTH:
467    case DATALINK_CBCP:
468    case DATALINK_OPEN:
469      if (descriptor_IsSet(&dl->chap.desc, fdset))
470        descriptor_Read(&dl->chap.desc, bundle, fdset);
471      if (descriptor_IsSet(&dl->physical->desc, fdset))
472        descriptor_Read(&dl->physical->desc, bundle, fdset);
473      break;
474  }
475}
476
477static int
478datalink_Write(struct fdescriptor *d, struct bundle *bundle,
479               const fd_set *fdset)
480{
481  struct datalink *dl = descriptor2datalink(d);
482  int result = 0;
483
484  switch (dl->state) {
485    case DATALINK_CLOSED:
486    case DATALINK_OPENING:
487      break;
488
489    case DATALINK_HANGUP:
490    case DATALINK_DIAL:
491    case DATALINK_LOGOUT:
492    case DATALINK_LOGIN:
493      if ((result = descriptor_Write(&dl->chat.desc, bundle, fdset)) == -1) {
494        datalink_ComeDown(dl, CLOSE_NORMAL);
495        result = 0;
496      }
497      break;
498
499    case DATALINK_READY:
500    case DATALINK_LCP:
501    case DATALINK_AUTH:
502    case DATALINK_CBCP:
503    case DATALINK_OPEN:
504      if (descriptor_IsSet(&dl->chap.desc, fdset))
505        switch (descriptor_Write(&dl->chap.desc, bundle, fdset)) {
506        case -1:
507          datalink_ComeDown(dl, CLOSE_NORMAL);
508          break;
509        case 1:
510          result++;
511        }
512      if (descriptor_IsSet(&dl->physical->desc, fdset))
513        switch (descriptor_Write(&dl->physical->desc, bundle, fdset)) {
514        case -1:
515          datalink_ComeDown(dl, CLOSE_NORMAL);
516          break;
517        case 1:
518          result++;
519        }
520      break;
521  }
522
523  return result;
524}
525
526void
527datalink_ComeDown(struct datalink *dl, int how)
528{
529  int stayonline;
530
531  if (how == CLOSE_LCP)
532    datalink_DontHangup(dl);
533  else if (how == CLOSE_STAYDOWN)
534    datalink_StayDown(dl);
535
536  stayonline = dl->stayonline;
537  dl->stayonline = 0;
538
539  if (dl->state >= DATALINK_READY && stayonline) {
540    physical_StopDeviceTimer(dl->physical);
541    datalink_NewState(dl, DATALINK_READY);
542  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
543    physical_Offline(dl->physical);
544    if (dl->script.run && dl->state != DATALINK_OPENING) {
545      if (dl->state == DATALINK_LOGOUT) {
546        datalink_NewState(dl, DATALINK_HANGUP);
547        if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
548          log_Printf(LogWARN, "Invalid hangup script\n");
549      } else {
550        datalink_NewState(dl, DATALINK_LOGOUT);
551        if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
552          log_Printf(LogWARN, "Invalid logout script\n");
553      }
554    } else
555      datalink_HangupDone(dl);
556  }
557}
558
559static void
560datalink_LayerStart(void *v, struct fsm *fp)
561{
562  /* The given FSM is about to start up ! */
563  struct datalink *dl = (struct datalink *)v;
564
565  if (fp->proto == PROTO_LCP)
566    (*dl->parent->LayerStart)(dl->parent->object, fp);
567}
568
569static void
570datalink_LayerUp(void *v, struct fsm *fp)
571{
572  /* The given fsm is now up */
573  struct datalink *dl = (struct datalink *)v;
574  struct lcp *lcp = &dl->physical->link.lcp;
575
576  if (fp->proto == PROTO_LCP) {
577    datalink_GotAuthname(dl, "");
578    lcp->auth_ineed = lcp->want_auth;
579    lcp->auth_iwait = lcp->his_auth;
580    if (lcp->his_auth || lcp->want_auth) {
581      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
582        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
583      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
584                Auth2Nam(lcp->his_auth, lcp->his_authtype),
585                Auth2Nam(lcp->want_auth, lcp->want_authtype));
586      if (lcp->his_auth == PROTO_PAP)
587        auth_StartReq(&dl->pap);
588      if (lcp->want_auth == PROTO_CHAP)
589        auth_StartReq(&dl->chap.auth);
590    } else
591      datalink_AuthOk(dl);
592  } else if (fp->proto == PROTO_CCP)
593    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.ccp.fsm);
594}
595
596static void
597datalink_AuthReInit(struct datalink *dl)
598{
599  auth_StopTimer(&dl->pap);
600  auth_StopTimer(&dl->chap.auth);
601  chap_ReInit(&dl->chap);
602}
603
604void
605datalink_GotAuthname(struct datalink *dl, const char *name)
606{
607  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
608  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
609}
610
611void
612datalink_NCPUp(struct datalink *dl)
613{
614  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
615
616  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
617    /* we've authenticated in multilink mode ! */
618    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
619      case MP_LINKSENT:
620        /* We've handed the link off to another ppp (well, we will soon) ! */
621        return;
622      case MP_UP:
623        /* First link in the bundle */
624        auth_Select(dl->bundle, dl->peer.authname);
625        bundle_CalculateBandwidth(dl->bundle);
626        /* FALLTHROUGH */
627      case MP_ADDED:
628        /* We're in multilink mode ! */
629        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
630        bundle_CalculateBandwidth(dl->bundle);
631        break;
632      case MP_FAILED:
633        datalink_AuthNotOk(dl);
634        return;
635    }
636  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
637    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
638    datalink_NewState(dl, DATALINK_OPEN);
639    bundle_CalculateBandwidth(dl->bundle);
640    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
641    return;
642  } else {
643    dl->bundle->ncp.mp.peer = dl->peer;
644    ncp_SetLink(&dl->bundle->ncp, &dl->physical->link);
645    auth_Select(dl->bundle, dl->peer.authname);
646  }
647
648  if (ccpok) {
649    fsm_Up(&dl->physical->link.ccp.fsm);
650    fsm_Open(&dl->physical->link.ccp.fsm);
651  }
652  datalink_NewState(dl, DATALINK_OPEN);
653  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
654  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
655}
656
657void
658datalink_CBCPComplete(struct datalink *dl)
659{
660  datalink_NewState(dl, DATALINK_LCP);
661  datalink_AuthReInit(dl);
662  fsm_Close(&dl->physical->link.lcp.fsm);
663}
664
665void
666datalink_CBCPFailed(struct datalink *dl)
667{
668  cbcp_Down(&dl->cbcp);
669  datalink_CBCPComplete(dl);
670}
671
672void
673datalink_AuthOk(struct datalink *dl)
674{
675  if ((dl->physical->link.lcp.his_callback.opmask &
676       CALLBACK_BIT(CALLBACK_CBCP) ||
677       dl->physical->link.lcp.want_callback.opmask &
678       CALLBACK_BIT(CALLBACK_CBCP)) &&
679      !(dl->physical->link.lcp.want_callback.opmask &
680        CALLBACK_BIT(CALLBACK_AUTH))) {
681    /* We must have agreed CBCP if AUTH isn't there any more */
682    datalink_NewState(dl, DATALINK_CBCP);
683    cbcp_Up(&dl->cbcp);
684  } else if (dl->physical->link.lcp.want_callback.opmask) {
685    /* It's not CBCP */
686    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
687    datalink_NewState(dl, DATALINK_LCP);
688    datalink_AuthReInit(dl);
689    fsm_Close(&dl->physical->link.lcp.fsm);
690  } else
691    switch (dl->physical->link.lcp.his_callback.opmask) {
692      case 0:
693        datalink_NCPUp(dl);
694        break;
695
696      case CALLBACK_BIT(CALLBACK_AUTH):
697        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
698                          sizeof dl->cbcp.fsm.phone);
699        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
700          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
701                     dl->peer.authname);
702          *dl->cbcp.fsm.phone = '\0';
703        } else {
704          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
705          if (ptr)
706            *ptr = '\0';	/* Call back on the first number */
707          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
708                     dl->cbcp.fsm.phone);
709          dl->cbcp.required = 1;
710        }
711        dl->cbcp.fsm.delay = 0;
712        datalink_NewState(dl, DATALINK_LCP);
713        datalink_AuthReInit(dl);
714        fsm_Close(&dl->physical->link.lcp.fsm);
715        break;
716
717      case CALLBACK_BIT(CALLBACK_E164):
718        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
719                sizeof dl->cbcp.fsm.phone - 1);
720        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
721        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
722                   dl->cbcp.fsm.phone);
723        dl->cbcp.required = 1;
724        dl->cbcp.fsm.delay = 0;
725        datalink_NewState(dl, DATALINK_LCP);
726        datalink_AuthReInit(dl);
727        fsm_Close(&dl->physical->link.lcp.fsm);
728        break;
729
730      default:
731        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
732                   dl->name);
733        datalink_NewState(dl, DATALINK_LCP);
734        datalink_AuthReInit(dl);
735        fsm_Close(&dl->physical->link.lcp.fsm);
736        break;
737    }
738}
739
740void
741datalink_AuthNotOk(struct datalink *dl)
742{
743  datalink_NewState(dl, DATALINK_LCP);
744  datalink_AuthReInit(dl);
745  fsm_Close(&dl->physical->link.lcp.fsm);
746}
747
748static void
749datalink_LayerDown(void *v, struct fsm *fp)
750{
751  /* The given FSM has been told to come down */
752  struct datalink *dl = (struct datalink *)v;
753
754  if (fp->proto == PROTO_LCP) {
755    switch (dl->state) {
756      case DATALINK_OPEN:
757        peerid_Init(&dl->peer);
758        fsm2initial(&dl->physical->link.ccp.fsm);
759        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
760        (*dl->parent->LayerDown)(dl->parent->object, fp);
761        /* FALLTHROUGH (just in case) */
762
763      case DATALINK_CBCP:
764        if (!dl->cbcp.required)
765          cbcp_Down(&dl->cbcp);
766        /* FALLTHROUGH (just in case) */
767
768      case DATALINK_AUTH:
769        timer_Stop(&dl->pap.authtimer);
770        timer_Stop(&dl->chap.auth.authtimer);
771    }
772    datalink_NewState(dl, DATALINK_LCP);
773    datalink_AuthReInit(dl);
774  }
775}
776
777static void
778datalink_LayerFinish(void *v, struct fsm *fp)
779{
780  /* The given fsm is now down */
781  struct datalink *dl = (struct datalink *)v;
782
783  if (fp->proto == PROTO_LCP) {
784    fsm2initial(fp);
785    (*dl->parent->LayerFinish)(dl->parent->object, fp);
786    datalink_ComeDown(dl, CLOSE_NORMAL);
787  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
788    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
789}
790
791struct datalink *
792datalink_Create(const char *name, struct bundle *bundle, int type)
793{
794  struct datalink *dl;
795
796  dl = (struct datalink *)malloc(sizeof(struct datalink));
797  if (dl == NULL)
798    return dl;
799
800  dl->desc.type = DATALINK_DESCRIPTOR;
801  dl->desc.UpdateSet = datalink_UpdateSet;
802  dl->desc.IsSet = datalink_IsSet;
803  dl->desc.Read = datalink_Read;
804  dl->desc.Write = datalink_Write;
805
806  dl->state = DATALINK_CLOSED;
807
808  *dl->cfg.script.dial = '\0';
809  *dl->cfg.script.login = '\0';
810  *dl->cfg.script.logout = '\0';
811  *dl->cfg.script.hangup = '\0';
812  *dl->cfg.phone.list = '\0';
813  *dl->phone.list = '\0';
814  dl->phone.next = NULL;
815  dl->phone.alt = NULL;
816  dl->phone.chosen = "N/A";
817  dl->stayonline = 0;
818  dl->script.run = 1;
819  dl->script.packetmode = 1;
820  mp_linkInit(&dl->mp);
821
822  dl->bundle = bundle;
823  dl->next = NULL;
824
825  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
826
827  dl->dial.tries = 0;
828  dl->cfg.dial.max = 1;
829  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
830  dl->cfg.dial.timeout = DIAL_TIMEOUT;
831  dl->cfg.dial.inc = 0;
832  dl->cfg.dial.maxinc = 10;
833
834  dl->reconnect_tries = 0;
835  dl->cfg.reconnect.max = 0;
836  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
837
838  dl->cfg.callback.opmask = 0;
839  dl->cfg.cbcp.delay = 0;
840  *dl->cfg.cbcp.phone = '\0';
841  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
842
843  dl->name = strdup(name);
844  peerid_Init(&dl->peer);
845  dl->parent = &bundle->fsm;
846  dl->fsmp.LayerStart = datalink_LayerStart;
847  dl->fsmp.LayerUp = datalink_LayerUp;
848  dl->fsmp.LayerDown = datalink_LayerDown;
849  dl->fsmp.LayerFinish = datalink_LayerFinish;
850  dl->fsmp.object = dl;
851
852  if ((dl->physical = physical_Create(dl, type)) == NULL) {
853    free(dl->name);
854    free(dl);
855    return NULL;
856  }
857
858  pap_Init(&dl->pap, dl->physical);
859  chap_Init(&dl->chap, dl->physical);
860  cbcp_Init(&dl->cbcp, dl->physical);
861
862  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
863  chat_Init(&dl->chat, dl->physical);
864
865  log_Printf(LogPHASE, "%s: Created in %s state\n",
866             dl->name, datalink_State(dl));
867
868  return dl;
869}
870
871struct datalink *
872datalink_Clone(struct datalink *odl, const char *name)
873{
874  struct datalink *dl;
875
876  dl = (struct datalink *)malloc(sizeof(struct datalink));
877  if (dl == NULL)
878    return dl;
879
880  dl->desc.type = DATALINK_DESCRIPTOR;
881  dl->desc.UpdateSet = datalink_UpdateSet;
882  dl->desc.IsSet = datalink_IsSet;
883  dl->desc.Read = datalink_Read;
884  dl->desc.Write = datalink_Write;
885
886  dl->state = DATALINK_CLOSED;
887
888  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
889  mp_linkInit(&dl->mp);
890  *dl->phone.list = '\0';
891  dl->phone.next = NULL;
892  dl->phone.alt = NULL;
893  dl->phone.chosen = "N/A";
894  dl->bundle = odl->bundle;
895  dl->next = NULL;
896  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
897  dl->dial.tries = 0;
898  dl->reconnect_tries = 0;
899  dl->name = strdup(name);
900  peerid_Init(&dl->peer);
901  dl->parent = odl->parent;
902  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
903  dl->fsmp.object = dl;
904
905  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
906    free(dl->name);
907    free(dl);
908    return NULL;
909  }
910  pap_Init(&dl->pap, dl->physical);
911  dl->pap.cfg = odl->pap.cfg;
912
913  chap_Init(&dl->chap, dl->physical);
914  dl->chap.auth.cfg = odl->chap.auth.cfg;
915
916  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
917  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
918         sizeof dl->physical->link.lcp.cfg);
919  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
920         sizeof dl->physical->link.ccp.cfg);
921  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
922         sizeof dl->physical->async.cfg);
923
924  cbcp_Init(&dl->cbcp, dl->physical);
925
926  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
927  chat_Init(&dl->chat, dl->physical);
928
929  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
930             dl->name, datalink_State(dl));
931
932  return dl;
933}
934
935struct datalink *
936datalink_Destroy(struct datalink *dl)
937{
938  struct datalink *result;
939
940  if (dl->state != DATALINK_CLOSED) {
941    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
942              datalink_State(dl));
943    switch (dl->state) {
944      case DATALINK_HANGUP:
945      case DATALINK_DIAL:
946      case DATALINK_LOGIN:
947        chat_Finish(&dl->chat);		/* Gotta blat the timers ! */
948        break;
949    }
950  }
951
952  chat_Destroy(&dl->chat);
953  timer_Stop(&dl->dial.timer);
954  result = dl->next;
955  physical_Destroy(dl->physical);
956  free(dl->name);
957  free(dl);
958
959  return result;
960}
961
962void
963datalink_Up(struct datalink *dl, int runscripts, int packetmode)
964{
965  if (!Enabled(dl->bundle, OPT_FORCE_SCRIPTS) &&
966      (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED)))
967    /* Ignore scripts */
968    runscripts = 0;
969
970  switch (dl->state) {
971    case DATALINK_CLOSED:
972      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
973          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
974        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
975      datalink_NewState(dl, DATALINK_OPENING);
976      dl->reconnect_tries =
977        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
978      dl->dial.tries = dl->cfg.dial.max;
979      dl->script.run = runscripts;
980      dl->script.packetmode = packetmode;
981      break;
982
983    case DATALINK_OPENING:
984      if (!dl->script.run && runscripts)
985        dl->script.run = 1;
986      /* FALLTHROUGH */
987
988    case DATALINK_DIAL:
989    case DATALINK_LOGIN:
990    case DATALINK_READY:
991      if (!dl->script.packetmode && packetmode) {
992        dl->script.packetmode = 1;
993        if (dl->state == DATALINK_READY) {
994          dl->script.run = 0;
995          datalink_NewState(dl, DATALINK_CARRIER);
996        }
997      }
998      break;
999  }
1000}
1001
1002void
1003datalink_Close(struct datalink *dl, int how)
1004{
1005  /* Please close */
1006  switch (dl->state) {
1007    case DATALINK_OPEN:
1008      peerid_Init(&dl->peer);
1009      fsm2initial(&dl->physical->link.ccp.fsm);
1010      /* FALLTHROUGH */
1011
1012    case DATALINK_CBCP:
1013    case DATALINK_AUTH:
1014    case DATALINK_LCP:
1015      datalink_AuthReInit(dl);
1016      if (how == CLOSE_LCP)
1017        datalink_DontHangup(dl);
1018      else if (how == CLOSE_STAYDOWN)
1019        datalink_StayDown(dl);
1020      fsm_Close(&dl->physical->link.lcp.fsm);
1021      break;
1022
1023    default:
1024      datalink_ComeDown(dl, how);
1025  }
1026}
1027
1028void
1029datalink_Down(struct datalink *dl, int how)
1030{
1031  /* Carrier is lost */
1032  switch (dl->state) {
1033    case DATALINK_OPEN:
1034      peerid_Init(&dl->peer);
1035      fsm2initial(&dl->physical->link.ccp.fsm);
1036      /* FALLTHROUGH */
1037
1038    case DATALINK_CBCP:
1039    case DATALINK_AUTH:
1040    case DATALINK_LCP:
1041      fsm2initial(&dl->physical->link.lcp.fsm);
1042      if (dl->state == DATALINK_OPENING)
1043        return;			/* we're doing a callback... */
1044      /* FALLTHROUGH */
1045
1046    default:
1047      datalink_ComeDown(dl, how);
1048  }
1049}
1050
1051void
1052datalink_StayDown(struct datalink *dl)
1053{
1054  dl->dial.tries = -1;
1055  dl->reconnect_tries = 0;
1056  dl->stayonline = 0;
1057}
1058
1059void
1060datalink_DontHangup(struct datalink *dl)
1061{
1062  dl->dial.tries = -1;
1063  dl->reconnect_tries = 0;
1064  dl->stayonline = dl->state >= DATALINK_LCP ? 1 : 0;
1065}
1066
1067int
1068datalink_Show(struct cmdargs const *arg)
1069{
1070  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1071  prompt_Printf(arg->prompt, " State:              %s\n",
1072                datalink_State(arg->cx));
1073  prompt_Printf(arg->prompt, " Peer name:          ");
1074  if (*arg->cx->peer.authname)
1075    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1076  else if (arg->cx->state == DATALINK_OPEN)
1077    prompt_Printf(arg->prompt, "None requested\n");
1078  else
1079    prompt_Printf(arg->prompt, "N/A\n");
1080  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1081                mp_Enddisc(arg->cx->peer.enddisc.class,
1082                           arg->cx->peer.enddisc.address,
1083                           arg->cx->peer.enddisc.len));
1084
1085  prompt_Printf(arg->prompt, "\nDefaults:\n");
1086  prompt_Printf(arg->prompt, " Phone List:         %s\n",
1087                arg->cx->cfg.phone.list);
1088  if (arg->cx->cfg.dial.max)
1089    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1090                  arg->cx->cfg.dial.max);
1091  else
1092    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1093  if (arg->cx->cfg.dial.next_timeout >= 0)
1094    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1095  else
1096    prompt_Printf(arg->prompt, "random/");
1097  if (arg->cx->cfg.dial.timeout >= 0)
1098    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1099  else
1100    prompt_Printf(arg->prompt, "random\n");
1101  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1102                arg->cx->cfg.reconnect.max);
1103  if (arg->cx->cfg.reconnect.timeout > 0)
1104    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1105  else
1106    prompt_Printf(arg->prompt, "random\n");
1107  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1108                PHYS_DIRECT ?  "accepted: " : "requested:");
1109  if (!arg->cx->cfg.callback.opmask)
1110    prompt_Printf(arg->prompt, "none\n");
1111  else {
1112    int comma = 0;
1113
1114    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1115      prompt_Printf(arg->prompt, "none");
1116      comma = 1;
1117    }
1118    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1119      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1120      comma = 1;
1121    }
1122    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1123      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1124      if (arg->cx->physical->type != PHYS_DIRECT)
1125        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1126      comma = 1;
1127    }
1128    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1129      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1130      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1131                    arg->cx->cfg.cbcp.delay);
1132      prompt_Printf(arg->prompt, "                     phone: ");
1133      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1134        if (arg->cx->physical->type & PHYS_DIRECT)
1135          prompt_Printf(arg->prompt, "Caller decides\n");
1136        else
1137          prompt_Printf(arg->prompt, "Dialback server decides\n");
1138      } else
1139        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1140      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1141                    arg->cx->cfg.cbcp.fsmretry);
1142    } else
1143      prompt_Printf(arg->prompt, "\n");
1144  }
1145
1146  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1147                arg->cx->cfg.script.dial);
1148  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1149                arg->cx->cfg.script.login);
1150  prompt_Printf(arg->prompt, " Logout Script:      %s\n",
1151                arg->cx->cfg.script.logout);
1152  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1153                arg->cx->cfg.script.hangup);
1154  return 0;
1155}
1156
1157int
1158datalink_SetReconnect(struct cmdargs const *arg)
1159{
1160  if (arg->argc == arg->argn+2) {
1161    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1162    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1163    return 0;
1164  }
1165  return -1;
1166}
1167
1168int
1169datalink_SetRedial(struct cmdargs const *arg)
1170{
1171  const char *sep, *osep;
1172  int timeout, inc, maxinc, tries;
1173
1174  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1175    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1176	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1177      arg->cx->cfg.dial.timeout = -1;
1178      randinit();
1179    } else {
1180      timeout = atoi(arg->argv[arg->argn]);
1181
1182      if (timeout >= 0)
1183	arg->cx->cfg.dial.timeout = timeout;
1184      else {
1185	log_Printf(LogWARN, "Invalid redial timeout\n");
1186	return -1;
1187      }
1188    }
1189
1190    sep = strchr(arg->argv[arg->argn], '+');
1191    if (sep) {
1192      inc = atoi(++sep);
1193      osep = sep;
1194      if (inc >= 0)
1195        arg->cx->cfg.dial.inc = inc;
1196      else {
1197        log_Printf(LogWARN, "Invalid timeout increment\n");
1198        return -1;
1199      }
1200      sep = strchr(sep, '-');
1201      if (sep) {
1202        maxinc = atoi(++sep);
1203        if (maxinc >= 0)
1204          arg->cx->cfg.dial.maxinc = maxinc;
1205        else {
1206          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1207          return -1;
1208        }
1209      } else {
1210        /* Default timeout increment */
1211        arg->cx->cfg.dial.maxinc = 10;
1212        sep = osep;
1213      }
1214    } else {
1215      /* Default timeout increment & max increment */
1216      arg->cx->cfg.dial.inc = 0;
1217      arg->cx->cfg.dial.maxinc = 10;
1218      sep = arg->argv[arg->argn];
1219    }
1220
1221    sep = strchr(sep, '.');
1222    if (sep) {
1223      if (strcasecmp(++sep, "random") == 0) {
1224	arg->cx->cfg.dial.next_timeout = -1;
1225	randinit();
1226      } else {
1227	timeout = atoi(sep);
1228	if (timeout >= 0)
1229	  arg->cx->cfg.dial.next_timeout = timeout;
1230	else {
1231	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1232	  return -1;
1233	}
1234      }
1235    } else
1236      /* Default next timeout */
1237      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1238
1239    if (arg->argc == arg->argn+2) {
1240      tries = atoi(arg->argv[arg->argn+1]);
1241
1242      if (tries >= 0) {
1243	arg->cx->cfg.dial.max = tries;
1244      } else {
1245	log_Printf(LogWARN, "Invalid retry value\n");
1246	return 1;
1247      }
1248    }
1249    return 0;
1250  }
1251
1252  return -1;
1253}
1254
1255static const char * const states[] = {
1256  "closed",
1257  "opening",
1258  "hangup",
1259  "dial",
1260  "carrier",
1261  "logout",
1262  "login",
1263  "ready",
1264  "lcp",
1265  "auth",
1266  "cbcp",
1267  "open"
1268};
1269
1270const char *
1271datalink_State(struct datalink *dl)
1272{
1273  if (dl->state >= sizeof states / sizeof states[0])
1274    return "unknown";
1275  return states[dl->state];
1276}
1277
1278static void
1279datalink_NewState(struct datalink *dl, unsigned state)
1280{
1281  if (state != dl->state) {
1282    if (state < sizeof states / sizeof states[0]) {
1283      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1284                 states[state]);
1285      dl->state = state;
1286    } else
1287      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1288  }
1289}
1290
1291struct datalink *
1292iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1293             int fd, int *auxfd, int *nauxfd)
1294{
1295  struct datalink *dl, *cdl;
1296  struct fsm_retry copy;
1297  char *oname, *pname;
1298
1299  dl = (struct datalink *)iov[(*niov)++].iov_base;
1300  dl->name = iov[*niov].iov_base;
1301
1302  if (dl->name[DATALINK_MAXNAME-1]) {
1303    dl->name[DATALINK_MAXNAME-1] = '\0';
1304    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1305      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1306  }
1307
1308  /* Make sure the name is unique ! */
1309  oname = NULL;
1310  do {
1311    for (cdl = bundle->links; cdl; cdl = cdl->next)
1312      if (!strcasecmp(dl->name, cdl->name)) {
1313        if ((pname = datalink_NextName(dl)) == NULL) {
1314	  for ((*niov)--; *niov < maxiov; (*niov)++)
1315	    free(iov[*niov].iov_base);
1316	  return NULL;
1317	} else if (oname)
1318          free(pname);
1319        else
1320          oname = pname;
1321        break;	/* Keep renaming 'till we have no conflicts */
1322      }
1323  } while (cdl);
1324
1325  if (oname) {
1326    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1327    free(oname);
1328  } else {
1329    dl->name = strdup(dl->name);
1330    free(iov[*niov].iov_base);
1331  }
1332  (*niov)++;
1333
1334  dl->desc.type = DATALINK_DESCRIPTOR;
1335  dl->desc.UpdateSet = datalink_UpdateSet;
1336  dl->desc.IsSet = datalink_IsSet;
1337  dl->desc.Read = datalink_Read;
1338  dl->desc.Write = datalink_Write;
1339
1340  mp_linkInit(&dl->mp);
1341  *dl->phone.list = '\0';
1342  dl->phone.next = NULL;
1343  dl->phone.alt = NULL;
1344  dl->phone.chosen = "N/A";
1345
1346  dl->bundle = bundle;
1347  dl->next = NULL;
1348  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1349  dl->dial.tries = 0;
1350  dl->reconnect_tries = 0;
1351  dl->parent = &bundle->fsm;
1352  dl->fsmp.LayerStart = datalink_LayerStart;
1353  dl->fsmp.LayerUp = datalink_LayerUp;
1354  dl->fsmp.LayerDown = datalink_LayerDown;
1355  dl->fsmp.LayerFinish = datalink_LayerFinish;
1356  dl->fsmp.object = dl;
1357
1358  dl->physical = iov2physical(dl, iov, niov, maxiov, fd, auxfd, nauxfd);
1359
1360  if (!dl->physical) {
1361    free(dl->name);
1362    free(dl);
1363    dl = NULL;
1364  } else {
1365    copy = dl->pap.cfg.fsm;
1366    pap_Init(&dl->pap, dl->physical);
1367    dl->pap.cfg.fsm = copy;
1368
1369    copy = dl->chap.auth.cfg.fsm;
1370    chap_Init(&dl->chap, dl->physical);
1371    dl->chap.auth.cfg.fsm = copy;
1372
1373    cbcp_Init(&dl->cbcp, dl->physical);
1374
1375    memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
1376    chat_Init(&dl->chat, dl->physical);
1377
1378    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1379              dl->name, datalink_State(dl));
1380  }
1381
1382  return dl;
1383}
1384
1385int
1386datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1387             int *auxfd, int *nauxfd)
1388{
1389  /* If `dl' is NULL, we're allocating before a Fromiov() */
1390  int link_fd;
1391
1392  if (dl) {
1393    timer_Stop(&dl->dial.timer);
1394    /* The following is purely for the sake of paranoia */
1395    cbcp_Down(&dl->cbcp);
1396    timer_Stop(&dl->pap.authtimer);
1397    timer_Stop(&dl->chap.auth.authtimer);
1398  }
1399
1400  if (*niov >= maxiov - 1) {
1401    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1402    if (dl) {
1403      free(dl->name);
1404      free(dl);
1405    }
1406    return -1;
1407  }
1408
1409  iov[*niov].iov_base = (void *)dl;
1410  iov[(*niov)++].iov_len = sizeof *dl;
1411  iov[*niov].iov_base = dl ? realloc(dl->name, DATALINK_MAXNAME) : NULL;
1412  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1413
1414  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, auxfd,
1415                         nauxfd);
1416
1417  if (link_fd == -1 && dl) {
1418    free(dl->name);
1419    free(dl);
1420  }
1421
1422  return link_fd;
1423}
1424
1425void
1426datalink_Rename(struct datalink *dl, const char *name)
1427{
1428  free(dl->name);
1429  dl->physical->link.name = dl->name = strdup(name);
1430}
1431
1432static char *
1433datalink_NextName(struct datalink *dl)
1434{
1435  int f, n;
1436  char *name, *oname;
1437
1438  n = strlen(dl->name);
1439  if ((name = (char *)malloc(n+3)) == NULL) {
1440    log_Printf(LogERROR, "datalink_NextName: Out of memory !\n");
1441    return NULL;
1442  }
1443  for (f = n - 1; f >= 0; f--)
1444    if (!isdigit(dl->name[f]))
1445      break;
1446  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1447  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1448  oname = dl->name;
1449  dl->name = name;
1450  /* our physical link name isn't updated (it probably isn't created yet) */
1451  return oname;
1452}
1453
1454int
1455datalink_SetMode(struct datalink *dl, int mode)
1456{
1457  if (!physical_SetMode(dl->physical, mode))
1458    return 0;
1459  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1460    dl->script.run = 0;
1461  if (dl->physical->type == PHYS_DIRECT)
1462    dl->reconnect_tries = 0;
1463  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND|PHYS_FOREGROUND) &&
1464      dl->state <= DATALINK_READY)
1465    datalink_Up(dl, 1, 1);
1466  return 1;
1467}
1468
1469int
1470datalink_GetDialTimeout(struct datalink *dl)
1471{
1472  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1473
1474  if (dl->dial.incs < dl->cfg.dial.maxinc)
1475    dl->dial.incs++;
1476
1477  return result;
1478}
1479