datalink.c revision 91623 
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 91623 2002-03-04 10:08:57Z 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/socket.h>
34#include <sys/un.h>
35
36#include <ctype.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>
40#include <sys/uio.h>
41#include <termios.h>
42
43#include "layer.h"
44#include "mbuf.h"
45#include "log.h"
46#include "defs.h"
47#include "timer.h"
48#include "fsm.h"
49#include "descriptor.h"
50#include "lqr.h"
51#include "hdlc.h"
52#include "lcp.h"
53#include "async.h"
54#include "throughput.h"
55#include "ccp.h"
56#include "link.h"
57#include "physical.h"
58#include "iplist.h"
59#include "slcompress.h"
60#include "ncpaddr.h"
61#include "ip.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 *, int);
83
84static void
85datalink_OpenTimeout(void *v)
86{
87  struct datalink *dl = (struct datalink *)v;
88
89  timer_Stop(&dl->dial.timer);
90  if (dl->state == DATALINK_OPENING)
91    log_Printf(LogCHAT, "%s: Redial timer expired.\n", dl->name);
92}
93
94static int
95datalink_StartDialTimer(struct datalink *dl, int Timeout)
96{
97  int result = Timeout;
98
99  timer_Stop(&dl->dial.timer);
100  if (Timeout < 0)
101    result = (random() % DIAL_TIMEOUT) + 1;
102  dl->dial.timer.load = result ? result * SECTICKS : 1;
103  dl->dial.timer.func = datalink_OpenTimeout;
104  dl->dial.timer.name = "dial";
105  dl->dial.timer.arg = dl;
106  timer_Start(&dl->dial.timer);
107  if (dl->state == DATALINK_OPENING)
108    log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
109               dl->name, result);
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        !(dl->physical->type & (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)))
162      datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
163  } else {
164    datalink_NewState(dl, DATALINK_OPENING);
165    if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
166        bundle_Phase(dl->bundle) == PHASE_TERMINATE)
167      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
168    if (dl->dial.tries < 0) {
169      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
170      dl->dial.tries = dl->cfg.dial.max;
171      dl->dial.incs = 0;
172      dl->reconnect_tries--;
173      log_Printf(LogCHAT, "%s: Reconnect try %d of %d\n",
174                 dl->name, dl->cfg.reconnect.max - dl->reconnect_tries,
175                 dl->cfg.reconnect.max);
176      bundle_Notify(dl->bundle, EX_RECONNECT);
177    } else {
178      if (dl->phone.next == NULL)
179        datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
180      else
181        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
182      bundle_Notify(dl->bundle, EX_REDIAL);
183    }
184  }
185}
186
187const char *
188datalink_ChoosePhoneNumber(struct datalink *dl)
189{
190  char *phone;
191
192  if (dl->phone.alt == NULL) {
193    if (dl->phone.next == NULL) {
194      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
195      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
196      if (*dl->phone.list == '\0')
197        return "";
198      dl->phone.next = dl->phone.list;
199    }
200    dl->phone.alt = strsep(&dl->phone.next, ":");
201  }
202  phone = strsep(&dl->phone.alt, "|");
203  dl->phone.chosen = *phone ? phone : "[NONE]";
204  if (*phone)
205    log_Printf(LogCHAT, "Phone: %s\n", phone);
206  return phone;
207}
208
209static void
210datalink_LoginDone(struct datalink *dl)
211{
212  chat_Finish(&dl->chat);
213
214  if (!dl->script.packetmode) {
215    dl->dial.tries = -1;
216    dl->dial.incs = 0;
217    datalink_NewState(dl, DATALINK_READY);
218  } else if (!physical_Raw(dl->physical)) {
219    dl->dial.tries = 0;
220    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
221    if (dl->script.run) {
222      datalink_NewState(dl, DATALINK_LOGOUT);
223      if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
224        log_Printf(LogWARN, "Invalid logout script\n");
225    } else {
226      physical_StopDeviceTimer(dl->physical);
227      if (dl->physical->type == PHYS_DEDICATED)
228        /* force a redial timeout */
229        physical_Close(dl->physical);
230      datalink_HangupDone(dl);
231    }
232  } else {
233    dl->dial.tries = -1;
234    dl->dial.incs = 0;
235
236    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
237    async_Setup(&dl->physical->async);
238
239    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
240              0 : dl->physical->link.lcp.cfg.openmode);
241    ccp_Setup(&dl->physical->link.ccp);
242
243    datalink_NewState(dl, DATALINK_LCP);
244    fsm_Up(&dl->physical->link.lcp.fsm);
245    fsm_Open(&dl->physical->link.lcp.fsm);
246  }
247}
248
249static int
250datalink_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
251                   int *n)
252{
253  struct datalink *dl = descriptor2datalink(d);
254  int result;
255
256  result = 0;
257  switch (dl->state) {
258    case DATALINK_CLOSED:
259      if ((dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|
260                                 PHYS_FOREGROUND|PHYS_DDIAL)) &&
261          !dl->bundle->CleaningUp)
262        /*
263         * Our first time in - DEDICATED & DDIAL never come down, and
264         * DIRECT, FOREGROUND & BACKGROUND get deleted when they enter
265         * DATALINK_CLOSED.  Go to DATALINK_OPENING via datalink_Up()
266         * and fall through.
267         */
268        datalink_Up(dl, 1, 1);
269      else
270        break;
271      /* fall through */
272
273    case DATALINK_OPENING:
274      if (dl->dial.timer.state != TIMER_RUNNING) {
275        if (--dl->dial.tries < 0)
276          dl->dial.tries = 0;
277        if (physical_Open(dl->physical, dl->bundle) >= 0) {
278          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
279                           "Type `~?' for help\r\n", dl->name,
280                           dl->physical->name.full);
281          if (dl->script.run) {
282            datalink_NewState(dl, DATALINK_DIAL);
283            if (!chat_Setup(&dl->chat, dl->cfg.script.dial,
284                            *dl->cfg.script.dial ?
285                            datalink_ChoosePhoneNumber(dl) : ""))
286              log_Printf(LogWARN, "Invalid dial script\n");
287            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
288                dl->cfg.dial.max)
289              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
290                        dl->name, dl->cfg.dial.max - dl->dial.tries,
291                        dl->cfg.dial.max);
292          } else
293            datalink_NewState(dl, DATALINK_CARRIER);
294          return datalink_UpdateSet(d, r, w, e, n);
295        } else {
296          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
297              dl->cfg.dial.max)
298            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
299                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
300          else
301            log_Printf(LogCHAT, "Failed to open device\n");
302
303          if (dl->bundle->CleaningUp ||
304              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
305               dl->cfg.dial.max && dl->dial.tries == 0)) {
306            datalink_NewState(dl, DATALINK_CLOSED);
307            dl->reconnect_tries = 0;
308            dl->dial.tries = -1;
309            log_WritePrompts(dl, "Failed to open %s\n",
310                             dl->physical->name.full);
311            bundle_LinkClosed(dl->bundle, dl);
312          }
313          if (!dl->bundle->CleaningUp) {
314            int timeout;
315
316            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
317            bundle_Notify(dl->bundle, EX_REDIAL);
318            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
319                             dl->physical->name.full, timeout);
320          }
321        }
322      }
323      break;
324
325    case DATALINK_CARRIER:
326      /* Wait for carrier on the device */
327      switch (physical_AwaitCarrier(dl->physical)) {
328        case CARRIER_PENDING:
329          log_Printf(LogDEBUG, "Waiting for carrier\n");
330          return 0;	/* A device timer is running to wake us up again */
331
332        case CARRIER_OK:
333          if (dl->script.run) {
334            datalink_NewState(dl, DATALINK_LOGIN);
335            if (!chat_Setup(&dl->chat, dl->cfg.script.login, NULL))
336              log_Printf(LogWARN, "Invalid login script\n");
337          } else
338            datalink_LoginDone(dl);
339          return datalink_UpdateSet(d, r, w, e, n);
340
341        case CARRIER_LOST:
342          physical_Offline(dl->physical);	/* Is this required ? */
343          if (dl->script.run) {
344            datalink_NewState(dl, DATALINK_HANGUP);
345            if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
346              log_Printf(LogWARN, "Invalid hangup script\n");
347            return datalink_UpdateSet(d, r, w, e, n);
348          } else {
349            datalink_HangupDone(dl);
350            return 0;	/* Maybe bundle_CleanDatalinks() has something to do */
351          }
352      }
353
354    case DATALINK_HANGUP:
355    case DATALINK_DIAL:
356    case DATALINK_LOGOUT:
357    case DATALINK_LOGIN:
358      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
359      switch (dl->chat.state) {
360        case CHAT_DONE:
361          /* script succeeded */
362          switch(dl->state) {
363            case DATALINK_HANGUP:
364              datalink_HangupDone(dl);
365              break;
366            case DATALINK_DIAL:
367              datalink_NewState(dl, DATALINK_CARRIER);
368              return datalink_UpdateSet(d, r, w, e, n);
369            case DATALINK_LOGOUT:
370              datalink_NewState(dl, DATALINK_HANGUP);
371              physical_Offline(dl->physical);
372              if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
373                log_Printf(LogWARN, "Invalid hangup script\n");
374              return datalink_UpdateSet(d, r, w, e, n);
375            case DATALINK_LOGIN:
376              dl->phone.alt = NULL;
377              datalink_LoginDone(dl);
378              return datalink_UpdateSet(d, r, w, e, n);
379          }
380          break;
381        case CHAT_FAILED:
382          /* Going down - script failed */
383          log_Printf(LogWARN, "Chat script failed\n");
384          switch(dl->state) {
385            case DATALINK_HANGUP:
386              datalink_HangupDone(dl);
387              break;
388            case DATALINK_DIAL:
389            case DATALINK_LOGOUT:
390            case DATALINK_LOGIN:
391              datalink_NewState(dl, DATALINK_HANGUP);
392              physical_Offline(dl->physical);
393              if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
394                log_Printf(LogWARN, "Invalid hangup script\n");
395              return datalink_UpdateSet(d, r, w, e, n);
396          }
397          break;
398      }
399      break;
400
401    case DATALINK_READY:
402    case DATALINK_LCP:
403    case DATALINK_AUTH:
404    case DATALINK_CBCP:
405    case DATALINK_OPEN:
406      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
407               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
408      break;
409  }
410  return result;
411}
412
413int
414datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
415{
416  return physical_RemoveFromSet(dl->physical, r, w, e);
417}
418
419static int
420datalink_IsSet(struct fdescriptor *d, const fd_set *fdset)
421{
422  struct datalink *dl = descriptor2datalink(d);
423
424  switch (dl->state) {
425    case DATALINK_CLOSED:
426    case DATALINK_OPENING:
427      break;
428
429    case DATALINK_HANGUP:
430    case DATALINK_DIAL:
431    case DATALINK_LOGOUT:
432    case DATALINK_LOGIN:
433      return descriptor_IsSet(&dl->chat.desc, fdset);
434
435    case DATALINK_READY:
436    case DATALINK_LCP:
437    case DATALINK_AUTH:
438    case DATALINK_CBCP:
439    case DATALINK_OPEN:
440      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
441             descriptor_IsSet(&dl->physical->desc, fdset);
442  }
443  return 0;
444}
445
446static void
447datalink_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
448{
449  struct datalink *dl = descriptor2datalink(d);
450
451  switch (dl->state) {
452    case DATALINK_CLOSED:
453    case DATALINK_OPENING:
454      break;
455
456    case DATALINK_HANGUP:
457    case DATALINK_DIAL:
458    case DATALINK_LOGOUT:
459    case DATALINK_LOGIN:
460      descriptor_Read(&dl->chat.desc, bundle, fdset);
461      break;
462
463    case DATALINK_READY:
464    case DATALINK_LCP:
465    case DATALINK_AUTH:
466    case DATALINK_CBCP:
467    case DATALINK_OPEN:
468      if (descriptor_IsSet(&dl->chap.desc, fdset))
469        descriptor_Read(&dl->chap.desc, bundle, fdset);
470      if (descriptor_IsSet(&dl->physical->desc, fdset))
471        descriptor_Read(&dl->physical->desc, bundle, fdset);
472      break;
473  }
474}
475
476static int
477datalink_Write(struct fdescriptor *d, struct bundle *bundle,
478               const fd_set *fdset)
479{
480  struct datalink *dl = descriptor2datalink(d);
481  int result = 0;
482
483  switch (dl->state) {
484    case DATALINK_CLOSED:
485    case DATALINK_OPENING:
486      break;
487
488    case DATALINK_HANGUP:
489    case DATALINK_DIAL:
490    case DATALINK_LOGOUT:
491    case DATALINK_LOGIN:
492      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
493      break;
494
495    case DATALINK_READY:
496    case DATALINK_LCP:
497    case DATALINK_AUTH:
498    case DATALINK_CBCP:
499    case DATALINK_OPEN:
500      if (descriptor_IsSet(&dl->chap.desc, fdset))
501        result += descriptor_Write(&dl->chap.desc, bundle, fdset);
502      if (descriptor_IsSet(&dl->physical->desc, fdset))
503        result += descriptor_Write(&dl->physical->desc, bundle, fdset);
504      break;
505  }
506
507  return result;
508}
509
510static void
511datalink_ComeDown(struct datalink *dl, int how)
512{
513  int stayonline;
514
515  if (how == CLOSE_LCP)
516    datalink_DontHangup(dl);
517  else if (how == CLOSE_STAYDOWN)
518    datalink_StayDown(dl);
519
520  stayonline = dl->stayonline;
521  dl->stayonline = 0;
522
523  if (dl->state >= DATALINK_READY && stayonline) {
524    physical_StopDeviceTimer(dl->physical);
525    datalink_NewState(dl, DATALINK_READY);
526  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
527    physical_Offline(dl->physical);
528    if (dl->script.run && dl->state != DATALINK_OPENING) {
529      if (dl->state == DATALINK_LOGOUT) {
530        datalink_NewState(dl, DATALINK_HANGUP);
531        if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
532          log_Printf(LogWARN, "Invalid hangup script\n");
533      } else {
534        datalink_NewState(dl, DATALINK_LOGOUT);
535        if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
536          log_Printf(LogWARN, "Invalid logout script\n");
537      }
538    } else
539      datalink_HangupDone(dl);
540  }
541}
542
543static void
544datalink_LayerStart(void *v, struct fsm *fp)
545{
546  /* The given FSM is about to start up ! */
547  struct datalink *dl = (struct datalink *)v;
548
549  if (fp->proto == PROTO_LCP)
550    (*dl->parent->LayerStart)(dl->parent->object, fp);
551}
552
553static void
554datalink_LayerUp(void *v, struct fsm *fp)
555{
556  /* The given fsm is now up */
557  struct datalink *dl = (struct datalink *)v;
558  struct lcp *lcp = &dl->physical->link.lcp;
559
560  if (fp->proto == PROTO_LCP) {
561    datalink_GotAuthname(dl, "");
562    lcp->auth_ineed = lcp->want_auth;
563    lcp->auth_iwait = lcp->his_auth;
564    if (lcp->his_auth || lcp->want_auth) {
565      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
566        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
567      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
568                Auth2Nam(lcp->his_auth, lcp->his_authtype),
569                Auth2Nam(lcp->want_auth, lcp->want_authtype));
570      if (lcp->his_auth == PROTO_PAP)
571        auth_StartReq(&dl->pap);
572      if (lcp->want_auth == PROTO_CHAP)
573        auth_StartReq(&dl->chap.auth);
574    } else
575      datalink_AuthOk(dl);
576  } else if (fp->proto == PROTO_CCP)
577    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.ccp.fsm);
578}
579
580static void
581datalink_AuthReInit(struct datalink *dl)
582{
583  auth_StopTimer(&dl->pap);
584  auth_StopTimer(&dl->chap.auth);
585  chap_ReInit(&dl->chap);
586}
587
588void
589datalink_GotAuthname(struct datalink *dl, const char *name)
590{
591  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
592  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
593}
594
595void
596datalink_NCPUp(struct datalink *dl)
597{
598  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
599
600  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
601    /* we've authenticated in multilink mode ! */
602    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
603      case MP_LINKSENT:
604        /* We've handed the link off to another ppp (well, we will soon) ! */
605        return;
606      case MP_UP:
607        /* First link in the bundle */
608        auth_Select(dl->bundle, dl->peer.authname);
609        bundle_CalculateBandwidth(dl->bundle);
610        /* fall through */
611      case MP_ADDED:
612        /* We're in multilink mode ! */
613        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
614        bundle_CalculateBandwidth(dl->bundle);
615        break;
616      case MP_FAILED:
617        datalink_AuthNotOk(dl);
618        return;
619    }
620  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
621    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
622    datalink_NewState(dl, DATALINK_OPEN);
623    bundle_CalculateBandwidth(dl->bundle);
624    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
625    return;
626  } else {
627    dl->bundle->ncp.mp.peer = dl->peer;
628    ncp_SetLink(&dl->bundle->ncp, &dl->physical->link);
629    auth_Select(dl->bundle, dl->peer.authname);
630  }
631
632  if (ccpok) {
633    fsm_Up(&dl->physical->link.ccp.fsm);
634    fsm_Open(&dl->physical->link.ccp.fsm);
635  }
636  datalink_NewState(dl, DATALINK_OPEN);
637  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
638  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
639}
640
641void
642datalink_CBCPComplete(struct datalink *dl)
643{
644  datalink_NewState(dl, DATALINK_LCP);
645  datalink_AuthReInit(dl);
646  fsm_Close(&dl->physical->link.lcp.fsm);
647}
648
649void
650datalink_CBCPFailed(struct datalink *dl)
651{
652  cbcp_Down(&dl->cbcp);
653  datalink_CBCPComplete(dl);
654}
655
656void
657datalink_AuthOk(struct datalink *dl)
658{
659  if ((dl->physical->link.lcp.his_callback.opmask &
660       CALLBACK_BIT(CALLBACK_CBCP) ||
661       dl->physical->link.lcp.want_callback.opmask &
662       CALLBACK_BIT(CALLBACK_CBCP)) &&
663      !(dl->physical->link.lcp.want_callback.opmask &
664        CALLBACK_BIT(CALLBACK_AUTH))) {
665    /* We must have agreed CBCP if AUTH isn't there any more */
666    datalink_NewState(dl, DATALINK_CBCP);
667    cbcp_Up(&dl->cbcp);
668  } else if (dl->physical->link.lcp.want_callback.opmask) {
669    /* It's not CBCP */
670    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
671    datalink_NewState(dl, DATALINK_LCP);
672    datalink_AuthReInit(dl);
673    fsm_Close(&dl->physical->link.lcp.fsm);
674  } else
675    switch (dl->physical->link.lcp.his_callback.opmask) {
676      case 0:
677        datalink_NCPUp(dl);
678        break;
679
680      case CALLBACK_BIT(CALLBACK_AUTH):
681        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
682                          sizeof dl->cbcp.fsm.phone);
683        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
684          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
685                     dl->peer.authname);
686          *dl->cbcp.fsm.phone = '\0';
687        } else {
688          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
689          if (ptr)
690            *ptr = '\0';	/* Call back on the first number */
691          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
692                     dl->cbcp.fsm.phone);
693          dl->cbcp.required = 1;
694        }
695        dl->cbcp.fsm.delay = 0;
696        datalink_NewState(dl, DATALINK_LCP);
697        datalink_AuthReInit(dl);
698        fsm_Close(&dl->physical->link.lcp.fsm);
699        break;
700
701      case CALLBACK_BIT(CALLBACK_E164):
702        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
703                sizeof dl->cbcp.fsm.phone - 1);
704        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
705        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
706                   dl->cbcp.fsm.phone);
707        dl->cbcp.required = 1;
708        dl->cbcp.fsm.delay = 0;
709        datalink_NewState(dl, DATALINK_LCP);
710        datalink_AuthReInit(dl);
711        fsm_Close(&dl->physical->link.lcp.fsm);
712        break;
713
714      default:
715        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
716                   dl->name);
717        datalink_NewState(dl, DATALINK_LCP);
718        datalink_AuthReInit(dl);
719        fsm_Close(&dl->physical->link.lcp.fsm);
720        break;
721    }
722}
723
724void
725datalink_AuthNotOk(struct datalink *dl)
726{
727  datalink_NewState(dl, DATALINK_LCP);
728  datalink_AuthReInit(dl);
729  fsm_Close(&dl->physical->link.lcp.fsm);
730}
731
732static void
733datalink_LayerDown(void *v, struct fsm *fp)
734{
735  /* The given FSM has been told to come down */
736  struct datalink *dl = (struct datalink *)v;
737
738  if (fp->proto == PROTO_LCP) {
739    switch (dl->state) {
740      case DATALINK_OPEN:
741        peerid_Init(&dl->peer);
742        fsm2initial(&dl->physical->link.ccp.fsm);
743        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
744        (*dl->parent->LayerDown)(dl->parent->object, fp);
745        /* fall through (just in case) */
746
747      case DATALINK_CBCP:
748        if (!dl->cbcp.required)
749          cbcp_Down(&dl->cbcp);
750        /* fall through (just in case) */
751
752      case DATALINK_AUTH:
753        timer_Stop(&dl->pap.authtimer);
754        timer_Stop(&dl->chap.auth.authtimer);
755    }
756    datalink_NewState(dl, DATALINK_LCP);
757    datalink_AuthReInit(dl);
758  }
759}
760
761static void
762datalink_LayerFinish(void *v, struct fsm *fp)
763{
764  /* The given fsm is now down */
765  struct datalink *dl = (struct datalink *)v;
766
767  if (fp->proto == PROTO_LCP) {
768    fsm2initial(fp);
769    (*dl->parent->LayerFinish)(dl->parent->object, fp);
770    datalink_ComeDown(dl, CLOSE_NORMAL);
771  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
772    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
773}
774
775struct datalink *
776datalink_Create(const char *name, struct bundle *bundle, int type)
777{
778  struct datalink *dl;
779
780  dl = (struct datalink *)malloc(sizeof(struct datalink));
781  if (dl == NULL)
782    return dl;
783
784  dl->desc.type = DATALINK_DESCRIPTOR;
785  dl->desc.UpdateSet = datalink_UpdateSet;
786  dl->desc.IsSet = datalink_IsSet;
787  dl->desc.Read = datalink_Read;
788  dl->desc.Write = datalink_Write;
789
790  dl->state = DATALINK_CLOSED;
791
792  *dl->cfg.script.dial = '\0';
793  *dl->cfg.script.login = '\0';
794  *dl->cfg.script.logout = '\0';
795  *dl->cfg.script.hangup = '\0';
796  *dl->cfg.phone.list = '\0';
797  *dl->phone.list = '\0';
798  dl->phone.next = NULL;
799  dl->phone.alt = NULL;
800  dl->phone.chosen = "N/A";
801  dl->stayonline = 0;
802  dl->script.run = 1;
803  dl->script.packetmode = 1;
804  mp_linkInit(&dl->mp);
805
806  dl->bundle = bundle;
807  dl->next = NULL;
808
809  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
810
811  dl->dial.tries = 0;
812  dl->cfg.dial.max = 1;
813  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
814  dl->cfg.dial.timeout = DIAL_TIMEOUT;
815  dl->cfg.dial.inc = 0;
816  dl->cfg.dial.maxinc = 10;
817
818  dl->reconnect_tries = 0;
819  dl->cfg.reconnect.max = 0;
820  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
821
822  dl->cfg.callback.opmask = 0;
823  dl->cfg.cbcp.delay = 0;
824  *dl->cfg.cbcp.phone = '\0';
825  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
826
827  dl->name = strdup(name);
828  peerid_Init(&dl->peer);
829  dl->parent = &bundle->fsm;
830  dl->fsmp.LayerStart = datalink_LayerStart;
831  dl->fsmp.LayerUp = datalink_LayerUp;
832  dl->fsmp.LayerDown = datalink_LayerDown;
833  dl->fsmp.LayerFinish = datalink_LayerFinish;
834  dl->fsmp.object = dl;
835
836  if ((dl->physical = physical_Create(dl, type)) == NULL) {
837    free(dl->name);
838    free(dl);
839    return NULL;
840  }
841
842  pap_Init(&dl->pap, dl->physical);
843  chap_Init(&dl->chap, dl->physical);
844  cbcp_Init(&dl->cbcp, dl->physical);
845
846  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
847  chat_Init(&dl->chat, dl->physical);
848
849  log_Printf(LogPHASE, "%s: Created in %s state\n",
850             dl->name, datalink_State(dl));
851
852  return dl;
853}
854
855struct datalink *
856datalink_Clone(struct datalink *odl, const char *name)
857{
858  struct datalink *dl;
859
860  dl = (struct datalink *)malloc(sizeof(struct datalink));
861  if (dl == NULL)
862    return dl;
863
864  dl->desc.type = DATALINK_DESCRIPTOR;
865  dl->desc.UpdateSet = datalink_UpdateSet;
866  dl->desc.IsSet = datalink_IsSet;
867  dl->desc.Read = datalink_Read;
868  dl->desc.Write = datalink_Write;
869
870  dl->state = DATALINK_CLOSED;
871
872  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
873  mp_linkInit(&dl->mp);
874  *dl->phone.list = '\0';
875  dl->phone.next = NULL;
876  dl->phone.alt = NULL;
877  dl->phone.chosen = "N/A";
878  dl->bundle = odl->bundle;
879  dl->next = NULL;
880  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
881  dl->dial.tries = 0;
882  dl->reconnect_tries = 0;
883  dl->name = strdup(name);
884  peerid_Init(&dl->peer);
885  dl->parent = odl->parent;
886  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
887  dl->fsmp.object = dl;
888
889  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
890    free(dl->name);
891    free(dl);
892    return NULL;
893  }
894  pap_Init(&dl->pap, dl->physical);
895  dl->pap.cfg = odl->pap.cfg;
896
897  chap_Init(&dl->chap, dl->physical);
898  dl->chap.auth.cfg = odl->chap.auth.cfg;
899
900  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
901  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
902         sizeof dl->physical->link.lcp.cfg);
903  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
904         sizeof dl->physical->link.ccp.cfg);
905  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
906         sizeof dl->physical->async.cfg);
907
908  cbcp_Init(&dl->cbcp, dl->physical);
909
910  memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
911  chat_Init(&dl->chat, dl->physical);
912
913  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
914             dl->name, datalink_State(dl));
915
916  return dl;
917}
918
919struct datalink *
920datalink_Destroy(struct datalink *dl)
921{
922  struct datalink *result;
923
924  if (dl->state != DATALINK_CLOSED) {
925    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
926              datalink_State(dl));
927    switch (dl->state) {
928      case DATALINK_HANGUP:
929      case DATALINK_DIAL:
930      case DATALINK_LOGIN:
931        chat_Finish(&dl->chat);		/* Gotta blat the timers ! */
932        break;
933    }
934  }
935
936  chat_Destroy(&dl->chat);
937  timer_Stop(&dl->dial.timer);
938  result = dl->next;
939  physical_Destroy(dl->physical);
940  free(dl->name);
941  free(dl);
942
943  return result;
944}
945
946void
947datalink_Up(struct datalink *dl, int runscripts, int packetmode)
948{
949  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
950    /* Ignore scripts */
951    runscripts = 0;
952
953  switch (dl->state) {
954    case DATALINK_CLOSED:
955      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
956          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
957        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
958      datalink_NewState(dl, DATALINK_OPENING);
959      dl->reconnect_tries =
960        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
961      dl->dial.tries = dl->cfg.dial.max;
962      dl->script.run = runscripts;
963      dl->script.packetmode = packetmode;
964      break;
965
966    case DATALINK_OPENING:
967      if (!dl->script.run && runscripts)
968        dl->script.run = 1;
969      /* fall through */
970
971    case DATALINK_DIAL:
972    case DATALINK_LOGIN:
973    case DATALINK_READY:
974      if (!dl->script.packetmode && packetmode) {
975        dl->script.packetmode = 1;
976        if (dl->state == DATALINK_READY) {
977          dl->script.run = 0;
978          datalink_NewState(dl, DATALINK_CARRIER);
979        }
980      }
981      break;
982  }
983}
984
985void
986datalink_Close(struct datalink *dl, int how)
987{
988  /* Please close */
989  switch (dl->state) {
990    case DATALINK_OPEN:
991      peerid_Init(&dl->peer);
992      fsm2initial(&dl->physical->link.ccp.fsm);
993      /* fall through */
994
995    case DATALINK_CBCP:
996    case DATALINK_AUTH:
997    case DATALINK_LCP:
998      datalink_AuthReInit(dl);
999      if (how == CLOSE_LCP)
1000        datalink_DontHangup(dl);
1001      else if (how == CLOSE_STAYDOWN)
1002        datalink_StayDown(dl);
1003      fsm_Close(&dl->physical->link.lcp.fsm);
1004      break;
1005
1006    default:
1007      datalink_ComeDown(dl, how);
1008  }
1009}
1010
1011void
1012datalink_Down(struct datalink *dl, int how)
1013{
1014  /* Carrier is lost */
1015  switch (dl->state) {
1016    case DATALINK_OPEN:
1017      peerid_Init(&dl->peer);
1018      fsm2initial(&dl->physical->link.ccp.fsm);
1019      /* fall through */
1020
1021    case DATALINK_CBCP:
1022    case DATALINK_AUTH:
1023    case DATALINK_LCP:
1024      fsm2initial(&dl->physical->link.lcp.fsm);
1025      if (dl->state == DATALINK_OPENING)
1026        return;			/* we're doing a callback... */
1027      /* fall through */
1028
1029    default:
1030      datalink_ComeDown(dl, how);
1031  }
1032}
1033
1034void
1035datalink_StayDown(struct datalink *dl)
1036{
1037  dl->dial.tries = -1;
1038  dl->reconnect_tries = 0;
1039  dl->stayonline = 0;
1040}
1041
1042void
1043datalink_DontHangup(struct datalink *dl)
1044{
1045  dl->dial.tries = -1;
1046  dl->reconnect_tries = 0;
1047  dl->stayonline = dl->state >= DATALINK_LCP ? 1 : 0;
1048}
1049
1050int
1051datalink_Show(struct cmdargs const *arg)
1052{
1053  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1054  prompt_Printf(arg->prompt, " State:              %s\n",
1055                datalink_State(arg->cx));
1056  prompt_Printf(arg->prompt, " Peer name:          ");
1057  if (*arg->cx->peer.authname)
1058    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1059  else if (arg->cx->state == DATALINK_OPEN)
1060    prompt_Printf(arg->prompt, "None requested\n");
1061  else
1062    prompt_Printf(arg->prompt, "N/A\n");
1063  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1064                mp_Enddisc(arg->cx->peer.enddisc.class,
1065                           arg->cx->peer.enddisc.address,
1066                           arg->cx->peer.enddisc.len));
1067
1068  prompt_Printf(arg->prompt, "\nDefaults:\n");
1069  prompt_Printf(arg->prompt, " Phone List:         %s\n",
1070                arg->cx->cfg.phone.list);
1071  if (arg->cx->cfg.dial.max)
1072    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1073                  arg->cx->cfg.dial.max);
1074  else
1075    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1076  if (arg->cx->cfg.dial.next_timeout >= 0)
1077    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1078  else
1079    prompt_Printf(arg->prompt, "random/");
1080  if (arg->cx->cfg.dial.timeout >= 0)
1081    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1082  else
1083    prompt_Printf(arg->prompt, "random\n");
1084  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1085                arg->cx->cfg.reconnect.max);
1086  if (arg->cx->cfg.reconnect.timeout > 0)
1087    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1088  else
1089    prompt_Printf(arg->prompt, "random\n");
1090  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1091                PHYS_DIRECT ?  "accepted: " : "requested:");
1092  if (!arg->cx->cfg.callback.opmask)
1093    prompt_Printf(arg->prompt, "none\n");
1094  else {
1095    int comma = 0;
1096
1097    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1098      prompt_Printf(arg->prompt, "none");
1099      comma = 1;
1100    }
1101    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1102      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1103      comma = 1;
1104    }
1105    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1106      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1107      if (arg->cx->physical->type != PHYS_DIRECT)
1108        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1109      comma = 1;
1110    }
1111    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1112      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1113      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1114                    arg->cx->cfg.cbcp.delay);
1115      prompt_Printf(arg->prompt, "                     phone: ");
1116      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1117        if (arg->cx->physical->type & PHYS_DIRECT)
1118          prompt_Printf(arg->prompt, "Caller decides\n");
1119        else
1120          prompt_Printf(arg->prompt, "Dialback server decides\n");
1121      } else
1122        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1123      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1124                    arg->cx->cfg.cbcp.fsmretry);
1125    } else
1126      prompt_Printf(arg->prompt, "\n");
1127  }
1128
1129  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1130                arg->cx->cfg.script.dial);
1131  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1132                arg->cx->cfg.script.login);
1133  prompt_Printf(arg->prompt, " Logout Script:      %s\n",
1134                arg->cx->cfg.script.logout);
1135  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1136                arg->cx->cfg.script.hangup);
1137  return 0;
1138}
1139
1140int
1141datalink_SetReconnect(struct cmdargs const *arg)
1142{
1143  if (arg->argc == arg->argn+2) {
1144    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1145    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1146    return 0;
1147  }
1148  return -1;
1149}
1150
1151int
1152datalink_SetRedial(struct cmdargs const *arg)
1153{
1154  const char *sep, *osep;
1155  int timeout, inc, maxinc, tries;
1156
1157  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1158    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1159	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1160      arg->cx->cfg.dial.timeout = -1;
1161      randinit();
1162    } else {
1163      timeout = atoi(arg->argv[arg->argn]);
1164
1165      if (timeout >= 0)
1166	arg->cx->cfg.dial.timeout = timeout;
1167      else {
1168	log_Printf(LogWARN, "Invalid redial timeout\n");
1169	return -1;
1170      }
1171    }
1172
1173    sep = strchr(arg->argv[arg->argn], '+');
1174    if (sep) {
1175      inc = atoi(++sep);
1176      osep = sep;
1177      if (inc >= 0)
1178        arg->cx->cfg.dial.inc = inc;
1179      else {
1180        log_Printf(LogWARN, "Invalid timeout increment\n");
1181        return -1;
1182      }
1183      sep = strchr(sep, '-');
1184      if (sep) {
1185        maxinc = atoi(++sep);
1186        if (maxinc >= 0)
1187          arg->cx->cfg.dial.maxinc = maxinc;
1188        else {
1189          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1190          return -1;
1191        }
1192      } else {
1193        /* Default timeout increment */
1194        arg->cx->cfg.dial.maxinc = 10;
1195        sep = osep;
1196      }
1197    } else {
1198      /* Default timeout increment & max increment */
1199      arg->cx->cfg.dial.inc = 0;
1200      arg->cx->cfg.dial.maxinc = 10;
1201      sep = arg->argv[arg->argn];
1202    }
1203
1204    sep = strchr(sep, '.');
1205    if (sep) {
1206      if (strcasecmp(++sep, "random") == 0) {
1207	arg->cx->cfg.dial.next_timeout = -1;
1208	randinit();
1209      } else {
1210	timeout = atoi(sep);
1211	if (timeout >= 0)
1212	  arg->cx->cfg.dial.next_timeout = timeout;
1213	else {
1214	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1215	  return -1;
1216	}
1217      }
1218    } else
1219      /* Default next timeout */
1220      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1221
1222    if (arg->argc == arg->argn+2) {
1223      tries = atoi(arg->argv[arg->argn+1]);
1224
1225      if (tries >= 0) {
1226	arg->cx->cfg.dial.max = tries;
1227      } else {
1228	log_Printf(LogWARN, "Invalid retry value\n");
1229	return 1;
1230      }
1231    }
1232    return 0;
1233  }
1234
1235  return -1;
1236}
1237
1238static const char * const states[] = {
1239  "closed",
1240  "opening",
1241  "hangup",
1242  "dial",
1243  "carrier",
1244  "logout",
1245  "login",
1246  "ready",
1247  "lcp",
1248  "auth",
1249  "cbcp",
1250  "open"
1251};
1252
1253const char *
1254datalink_State(struct datalink *dl)
1255{
1256  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1257    return "unknown";
1258  return states[dl->state];
1259}
1260
1261static void
1262datalink_NewState(struct datalink *dl, int state)
1263{
1264  if (state != dl->state) {
1265    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1266      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1267                 states[state]);
1268      dl->state = state;
1269    } else
1270      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1271  }
1272}
1273
1274struct datalink *
1275iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1276             int fd, int *auxfd, int *nauxfd)
1277{
1278  struct datalink *dl, *cdl;
1279  struct fsm_retry copy;
1280  char *oname;
1281
1282  dl = (struct datalink *)iov[(*niov)++].iov_base;
1283  dl->name = iov[*niov].iov_base;
1284
1285  if (dl->name[DATALINK_MAXNAME-1]) {
1286    dl->name[DATALINK_MAXNAME-1] = '\0';
1287    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1288      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1289  }
1290
1291  /* Make sure the name is unique ! */
1292  oname = NULL;
1293  do {
1294    for (cdl = bundle->links; cdl; cdl = cdl->next)
1295      if (!strcasecmp(dl->name, cdl->name)) {
1296        if (oname)
1297          free(datalink_NextName(dl));
1298        else
1299          oname = datalink_NextName(dl);
1300        break;	/* Keep renaming 'till we have no conflicts */
1301      }
1302  } while (cdl);
1303
1304  if (oname) {
1305    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1306    free(oname);
1307  } else {
1308    dl->name = strdup(dl->name);
1309    free(iov[*niov].iov_base);
1310  }
1311  (*niov)++;
1312
1313  dl->desc.type = DATALINK_DESCRIPTOR;
1314  dl->desc.UpdateSet = datalink_UpdateSet;
1315  dl->desc.IsSet = datalink_IsSet;
1316  dl->desc.Read = datalink_Read;
1317  dl->desc.Write = datalink_Write;
1318
1319  mp_linkInit(&dl->mp);
1320  *dl->phone.list = '\0';
1321  dl->phone.next = NULL;
1322  dl->phone.alt = NULL;
1323  dl->phone.chosen = "N/A";
1324
1325  dl->bundle = bundle;
1326  dl->next = NULL;
1327  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1328  dl->dial.tries = 0;
1329  dl->reconnect_tries = 0;
1330  dl->parent = &bundle->fsm;
1331  dl->fsmp.LayerStart = datalink_LayerStart;
1332  dl->fsmp.LayerUp = datalink_LayerUp;
1333  dl->fsmp.LayerDown = datalink_LayerDown;
1334  dl->fsmp.LayerFinish = datalink_LayerFinish;
1335  dl->fsmp.object = dl;
1336
1337  dl->physical = iov2physical(dl, iov, niov, maxiov, fd, auxfd, nauxfd);
1338
1339  if (!dl->physical) {
1340    free(dl->name);
1341    free(dl);
1342    dl = NULL;
1343  } else {
1344    copy = dl->pap.cfg.fsm;
1345    pap_Init(&dl->pap, dl->physical);
1346    dl->pap.cfg.fsm = copy;
1347
1348    copy = dl->chap.auth.cfg.fsm;
1349    chap_Init(&dl->chap, dl->physical);
1350    dl->chap.auth.cfg.fsm = copy;
1351
1352    cbcp_Init(&dl->cbcp, dl->physical);
1353
1354    memset(&dl->chat, '\0', sizeof dl->chat);	/* Force buf{start,end} reset */
1355    chat_Init(&dl->chat, dl->physical);
1356
1357    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1358              dl->name, datalink_State(dl));
1359  }
1360
1361  return dl;
1362}
1363
1364int
1365datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1366             int *auxfd, int *nauxfd)
1367{
1368  /* If `dl' is NULL, we're allocating before a Fromiov() */
1369  int link_fd;
1370
1371  if (dl) {
1372    timer_Stop(&dl->dial.timer);
1373    /* The following is purely for the sake of paranoia */
1374    cbcp_Down(&dl->cbcp);
1375    timer_Stop(&dl->pap.authtimer);
1376    timer_Stop(&dl->chap.auth.authtimer);
1377  }
1378
1379  if (*niov >= maxiov - 1) {
1380    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1381    if (dl) {
1382      free(dl->name);
1383      free(dl);
1384    }
1385    return -1;
1386  }
1387
1388  iov[*niov].iov_base = (void *)dl;
1389  iov[(*niov)++].iov_len = sizeof *dl;
1390  iov[*niov].iov_base = dl ? realloc(dl->name, DATALINK_MAXNAME) : NULL;
1391  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1392
1393  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, auxfd,
1394                         nauxfd);
1395
1396  if (link_fd == -1 && dl) {
1397    free(dl->name);
1398    free(dl);
1399  }
1400
1401  return link_fd;
1402}
1403
1404void
1405datalink_Rename(struct datalink *dl, const char *name)
1406{
1407  free(dl->name);
1408  dl->physical->link.name = dl->name = strdup(name);
1409}
1410
1411char *
1412datalink_NextName(struct datalink *dl)
1413{
1414  int f, n;
1415  char *name, *oname;
1416
1417  n = strlen(dl->name);
1418  name = (char *)malloc(n+3);
1419  for (f = n - 1; f >= 0; f--)
1420    if (!isdigit(dl->name[f]))
1421      break;
1422  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1423  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1424  oname = dl->name;
1425  dl->name = name;
1426  /* our physical link name isn't updated (it probably isn't created yet) */
1427  return oname;
1428}
1429
1430int
1431datalink_SetMode(struct datalink *dl, int mode)
1432{
1433  if (!physical_SetMode(dl->physical, mode))
1434    return 0;
1435  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1436    dl->script.run = 0;
1437  if (dl->physical->type == PHYS_DIRECT)
1438    dl->reconnect_tries = 0;
1439  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND|PHYS_FOREGROUND) &&
1440      dl->state <= DATALINK_READY)
1441    datalink_Up(dl, 1, 1);
1442  return 1;
1443}
1444
1445int
1446datalink_GetDialTimeout(struct datalink *dl)
1447{
1448  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1449
1450  if (dl->dial.incs < dl->cfg.dial.maxinc)
1451    dl->dial.incs++;
1452
1453  return result;
1454}
1455