datalink.c revision 51978 
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 51978 1999-10-07 07:32:12Z brian $
27 */
28
29#include <sys/param.h>
30#include <netinet/in.h>
31#include <netinet/in_systm.h>
32#include <netinet/ip.h>
33#include <sys/un.h>
34
35#include <ctype.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <sys/uio.h>
40#include <termios.h>
41
42#include "layer.h"
43#include "mbuf.h"
44#include "log.h"
45#include "defs.h"
46#include "timer.h"
47#include "fsm.h"
48#include "lcp.h"
49#include "descriptor.h"
50#include "lqr.h"
51#include "hdlc.h"
52#include "async.h"
53#include "throughput.h"
54#include "ccp.h"
55#include "link.h"
56#include "physical.h"
57#include "iplist.h"
58#include "slcompress.h"
59#include "ipcp.h"
60#include "filter.h"
61#include "mp.h"
62#ifndef NORADIUS
63#include "radius.h"
64#endif
65#include "bundle.h"
66#include "chat.h"
67#include "auth.h"
68#include "prompt.h"
69#include "proto.h"
70#include "pap.h"
71#include "chap.h"
72#include "command.h"
73#include "cbcp.h"
74#include "datalink.h"
75
76static void datalink_LoginDone(struct datalink *);
77static void datalink_NewState(struct datalink *, int);
78
79static void
80datalink_OpenTimeout(void *v)
81{
82  struct datalink *dl = (struct datalink *)v;
83
84  timer_Stop(&dl->dial.timer);
85  if (dl->state == DATALINK_OPENING)
86    log_Printf(LogPHASE, "%s: Redial timer expired.\n", dl->name);
87}
88
89static int
90datalink_StartDialTimer(struct datalink *dl, int Timeout)
91{
92  int result = Timeout;
93
94  timer_Stop(&dl->dial.timer);
95  if (Timeout) {
96    if (Timeout > 0)
97      dl->dial.timer.load = Timeout * SECTICKS;
98    else {
99      result = (random() % DIAL_TIMEOUT) + 1;
100      dl->dial.timer.load = result * SECTICKS;
101    }
102    dl->dial.timer.func = datalink_OpenTimeout;
103    dl->dial.timer.name = "dial";
104    dl->dial.timer.arg = dl;
105    timer_Start(&dl->dial.timer);
106    if (dl->state == DATALINK_OPENING)
107      log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
108                dl->name, Timeout);
109  }
110  return result;
111}
112
113static void
114datalink_HangupDone(struct datalink *dl)
115{
116  if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
117      dl->physical->fd != -1) {
118    /* Don't close our device if the link is dedicated */
119    datalink_LoginDone(dl);
120    return;
121  }
122
123  physical_Close(dl->physical);
124  dl->phone.chosen = "N/A";
125
126  if (dl->cbcp.required) {
127    log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
128    dl->cfg.callback.opmask = 0;
129    strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
130            sizeof dl->cfg.phone.list - 1);
131    dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
132    dl->phone.alt = dl->phone.next = NULL;
133    dl->reconnect_tries = dl->cfg.reconnect.max;
134    dl->dial.tries = dl->cfg.dial.max;
135    dl->dial.incs = 0;
136    dl->script.run = 1;
137    dl->script.packetmode = 1;
138    if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
139      log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
140    bundle_LinksRemoved(dl->bundle);
141    /* if dial.timeout is < 0 (random), we don't override fsm.delay */
142    if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
143      dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
144    datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
145    cbcp_Down(&dl->cbcp);
146    datalink_NewState(dl, DATALINK_OPENING);
147    if (bundle_Phase(dl->bundle) != PHASE_TERMINATE)
148      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
149  } else if (dl->bundle->CleaningUp ||
150      (dl->physical->type == PHYS_DIRECT) ||
151      ((!dl->dial.tries || (dl->dial.tries < 0 && !dl->reconnect_tries)) &&
152       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
153    datalink_NewState(dl, DATALINK_CLOSED);
154    dl->dial.tries = -1;
155    dl->dial.incs = 0;
156    dl->reconnect_tries = 0;
157    bundle_LinkClosed(dl->bundle, dl);
158    if (!dl->bundle->CleaningUp)
159      datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
160  } else {
161    datalink_NewState(dl, DATALINK_OPENING);
162    if (bundle_Phase(dl->bundle) != PHASE_TERMINATE)
163      bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
164    if (dl->dial.tries < 0) {
165      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
166      dl->dial.tries = dl->cfg.dial.max;
167      dl->dial.incs = 0;
168      dl->reconnect_tries--;
169    } else {
170      if (dl->phone.next == NULL)
171        datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
172      else
173        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
174    }
175  }
176}
177
178const char *
179datalink_ChoosePhoneNumber(struct datalink *dl)
180{
181  char *phone;
182
183  if (dl->phone.alt == NULL) {
184    if (dl->phone.next == NULL) {
185      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
186      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
187      if (*dl->phone.list == '\0')
188        return "";
189      dl->phone.next = dl->phone.list;
190    }
191    dl->phone.alt = strsep(&dl->phone.next, ":");
192  }
193  phone = strsep(&dl->phone.alt, "|");
194  dl->phone.chosen = *phone ? phone : "[NONE]";
195  if (*phone)
196    log_Printf(LogPHASE, "Phone: %s\n", phone);
197  return phone;
198}
199
200static void
201datalink_LoginDone(struct datalink *dl)
202{
203  if (!dl->script.packetmode) {
204    dl->dial.tries = -1;
205    dl->dial.incs = 0;
206    datalink_NewState(dl, DATALINK_READY);
207  } else if (!physical_Raw(dl->physical)) {
208    dl->dial.tries = 0;
209    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
210    if (dl->script.run) {
211      datalink_NewState(dl, DATALINK_HANGUP);
212      physical_Offline(dl->physical);
213      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
214    } else {
215      physical_StopDeviceTimer(dl->physical);
216      if (dl->physical->type == PHYS_DEDICATED)
217        /* force a redial timeout */
218        physical_Close(dl->physical);
219      datalink_HangupDone(dl);
220    }
221  } else {
222    dl->dial.tries = -1;
223    dl->dial.incs = 0;
224
225    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
226    async_Init(&dl->physical->async);
227
228    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
229              0 : dl->physical->link.lcp.cfg.openmode);
230    ccp_Setup(&dl->physical->link.ccp);
231
232    datalink_NewState(dl, DATALINK_LCP);
233    fsm_Up(&dl->physical->link.lcp.fsm);
234    fsm_Open(&dl->physical->link.lcp.fsm);
235  }
236}
237
238static int
239datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
240                   int *n)
241{
242  struct datalink *dl = descriptor2datalink(d);
243  int result;
244
245  result = 0;
246  switch (dl->state) {
247    case DATALINK_CLOSED:
248      if ((dl->physical->type &
249           (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|PHYS_DDIAL)) &&
250          !dl->bundle->CleaningUp)
251        /*
252         * Our first time in - DEDICATED & DDIAL never come down, and
253         * DIRECT & BACKGROUND get deleted when they enter DATALINK_CLOSED.
254         * Go to DATALINK_OPENING via datalink_Up() and fall through.
255         */
256        datalink_Up(dl, 1, 1);
257      else
258        break;
259      /* fall through */
260
261    case DATALINK_OPENING:
262      if (dl->dial.timer.state != TIMER_RUNNING) {
263        if (--dl->dial.tries < 0)
264          dl->dial.tries = 0;
265        if (physical_Open(dl->physical, dl->bundle) >= 0) {
266          log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
267                           "Type `~?' for help\r\n", dl->name,
268                           dl->physical->name.full);
269          if (dl->script.run) {
270            datalink_NewState(dl, DATALINK_DIAL);
271            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial, 1,
272                      *dl->cfg.script.dial ?
273                      datalink_ChoosePhoneNumber(dl) : "");
274            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
275                dl->cfg.dial.max)
276              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
277                        dl->name, dl->cfg.dial.max - dl->dial.tries,
278                        dl->cfg.dial.max);
279          } else
280            datalink_NewState(dl, DATALINK_CARRIER);
281          return datalink_UpdateSet(d, r, w, e, n);
282        } else {
283          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
284              dl->cfg.dial.max)
285            log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
286                       dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
287          else
288            log_Printf(LogCHAT, "Failed to open device\n");
289
290          if (dl->bundle->CleaningUp ||
291              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
292               dl->cfg.dial.max && dl->dial.tries == 0)) {
293            datalink_NewState(dl, DATALINK_CLOSED);
294            dl->reconnect_tries = 0;
295            dl->dial.tries = -1;
296            log_WritePrompts(dl, "Failed to open %s\n",
297                             dl->physical->name.full);
298            bundle_LinkClosed(dl->bundle, dl);
299          }
300          if (!dl->bundle->CleaningUp) {
301            int timeout;
302
303            timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
304            log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
305                             dl->physical->name.full, timeout);
306          }
307        }
308      }
309      break;
310
311    case DATALINK_CARRIER:
312      /* Wait for carrier on the device */
313      switch (physical_AwaitCarrier(dl->physical)) {
314        case CARRIER_PENDING:
315          log_Printf(LogDEBUG, "Waiting for carrier\n");
316          return 0;	/* A device timer is running to wake us up again */
317
318        case CARRIER_OK:
319          if (dl->script.run) {
320            datalink_NewState(dl, DATALINK_LOGIN);
321            chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, 0, NULL);
322          } else
323            datalink_LoginDone(dl);
324          return datalink_UpdateSet(d, r, w, e, n);
325
326        case CARRIER_LOST:
327          physical_Offline(dl->physical);	/* Is this required ? */
328          if (dl->script.run) {
329            datalink_NewState(dl, DATALINK_HANGUP);
330            chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
331          } else
332            datalink_HangupDone(dl);
333          return datalink_UpdateSet(d, r, w, e, n);
334      }
335
336    case DATALINK_HANGUP:
337    case DATALINK_DIAL:
338    case DATALINK_LOGIN:
339      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
340      switch (dl->chat.state) {
341        case CHAT_DONE:
342          /* script succeeded */
343          chat_Destroy(&dl->chat);
344          switch(dl->state) {
345            case DATALINK_HANGUP:
346              datalink_HangupDone(dl);
347              break;
348            case DATALINK_DIAL:
349              datalink_NewState(dl, DATALINK_CARRIER);
350              return datalink_UpdateSet(d, r, w, e, n);
351            case DATALINK_LOGIN:
352              dl->phone.alt = NULL;
353              datalink_LoginDone(dl);
354              return datalink_UpdateSet(d, r, w, e, n);
355          }
356          break;
357        case CHAT_FAILED:
358          /* Going down - script failed */
359          log_Printf(LogWARN, "Chat script failed\n");
360          chat_Destroy(&dl->chat);
361          switch(dl->state) {
362            case DATALINK_HANGUP:
363              datalink_HangupDone(dl);
364              break;
365            case DATALINK_DIAL:
366            case DATALINK_LOGIN:
367              datalink_NewState(dl, DATALINK_HANGUP);
368              physical_Offline(dl->physical);	/* Is this required ? */
369              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup,
370                        1, NULL);
371              return datalink_UpdateSet(d, r, w, e, n);
372          }
373          break;
374      }
375      break;
376
377    case DATALINK_READY:
378    case DATALINK_LCP:
379    case DATALINK_AUTH:
380    case DATALINK_CBCP:
381    case DATALINK_OPEN:
382      result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
383               descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
384      break;
385  }
386  return result;
387}
388
389int
390datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
391{
392  return physical_RemoveFromSet(dl->physical, r, w, e);
393}
394
395static int
396datalink_IsSet(struct descriptor *d, const fd_set *fdset)
397{
398  struct datalink *dl = descriptor2datalink(d);
399
400  switch (dl->state) {
401    case DATALINK_CLOSED:
402    case DATALINK_OPENING:
403      break;
404
405    case DATALINK_HANGUP:
406    case DATALINK_DIAL:
407    case DATALINK_LOGIN:
408      return descriptor_IsSet(&dl->chat.desc, fdset);
409
410    case DATALINK_READY:
411    case DATALINK_LCP:
412    case DATALINK_AUTH:
413    case DATALINK_CBCP:
414    case DATALINK_OPEN:
415      return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
416             descriptor_IsSet(&dl->physical->desc, fdset);
417  }
418  return 0;
419}
420
421static void
422datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
423{
424  struct datalink *dl = descriptor2datalink(d);
425
426  switch (dl->state) {
427    case DATALINK_CLOSED:
428    case DATALINK_OPENING:
429      break;
430
431    case DATALINK_HANGUP:
432    case DATALINK_DIAL:
433    case DATALINK_LOGIN:
434      descriptor_Read(&dl->chat.desc, bundle, fdset);
435      break;
436
437    case DATALINK_READY:
438    case DATALINK_LCP:
439    case DATALINK_AUTH:
440    case DATALINK_CBCP:
441    case DATALINK_OPEN:
442      if (descriptor_IsSet(&dl->chap.desc, fdset))
443        descriptor_Read(&dl->chap.desc, bundle, fdset);
444      if (descriptor_IsSet(&dl->physical->desc, fdset))
445        descriptor_Read(&dl->physical->desc, bundle, fdset);
446      break;
447  }
448}
449
450static int
451datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
452{
453  struct datalink *dl = descriptor2datalink(d);
454  int result = 0;
455
456  switch (dl->state) {
457    case DATALINK_CLOSED:
458    case DATALINK_OPENING:
459      break;
460
461    case DATALINK_HANGUP:
462    case DATALINK_DIAL:
463    case DATALINK_LOGIN:
464      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
465      break;
466
467    case DATALINK_READY:
468    case DATALINK_LCP:
469    case DATALINK_AUTH:
470    case DATALINK_CBCP:
471    case DATALINK_OPEN:
472      if (descriptor_IsSet(&dl->chap.desc, fdset))
473        result += descriptor_Write(&dl->chap.desc, bundle, fdset);
474      if (descriptor_IsSet(&dl->physical->desc, fdset))
475        result += descriptor_Write(&dl->physical->desc, bundle, fdset);
476      break;
477  }
478
479  return result;
480}
481
482static void
483datalink_ComeDown(struct datalink *dl, int how)
484{
485  if (how != CLOSE_NORMAL) {
486    dl->dial.tries = -1;
487    dl->reconnect_tries = 0;
488    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
489      dl->stayonline = 1;
490  }
491
492  if (dl->state >= DATALINK_READY && dl->stayonline) {
493    dl->stayonline = 0;
494    physical_StopDeviceTimer(dl->physical);
495    datalink_NewState(dl, DATALINK_READY);
496  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
497    physical_Offline(dl->physical);
498    chat_Destroy(&dl->chat);
499    if (dl->script.run && dl->state != DATALINK_OPENING) {
500      datalink_NewState(dl, DATALINK_HANGUP);
501      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
502    } else
503      datalink_HangupDone(dl);
504  }
505}
506
507static void
508datalink_LayerStart(void *v, struct fsm *fp)
509{
510  /* The given FSM is about to start up ! */
511  struct datalink *dl = (struct datalink *)v;
512
513  if (fp->proto == PROTO_LCP)
514    (*dl->parent->LayerStart)(dl->parent->object, fp);
515}
516
517static void
518datalink_LayerUp(void *v, struct fsm *fp)
519{
520  /* The given fsm is now up */
521  struct datalink *dl = (struct datalink *)v;
522  struct lcp *lcp = &dl->physical->link.lcp;
523
524  if (fp->proto == PROTO_LCP) {
525    datalink_GotAuthname(dl, "");
526    lcp->auth_ineed = lcp->want_auth;
527    lcp->auth_iwait = lcp->his_auth;
528    if (lcp->his_auth || lcp->want_auth) {
529      if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
530        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
531      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
532                Auth2Nam(lcp->his_auth, lcp->his_authtype),
533                Auth2Nam(lcp->want_auth, lcp->want_authtype));
534      if (lcp->his_auth == PROTO_PAP)
535        auth_StartReq(&dl->pap);
536      if (lcp->want_auth == PROTO_CHAP)
537        auth_StartReq(&dl->chap.auth);
538    } else
539      datalink_AuthOk(dl);
540  }
541}
542
543static void
544datalink_AuthReInit(struct datalink *dl)
545{
546  auth_StopTimer(&dl->pap);
547  auth_StopTimer(&dl->chap.auth);
548  chap_ReInit(&dl->chap);
549}
550
551void
552datalink_GotAuthname(struct datalink *dl, const char *name)
553{
554  strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
555  dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
556}
557
558void
559datalink_NCPUp(struct datalink *dl)
560{
561  int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
562
563  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
564    /* we've authenticated in multilink mode ! */
565    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
566      case MP_LINKSENT:
567        /* We've handed the link off to another ppp (well, we will soon) ! */
568        return;
569      case MP_UP:
570        /* First link in the bundle */
571        auth_Select(dl->bundle, dl->peer.authname);
572        bundle_CalculateBandwidth(dl->bundle);
573        /* fall through */
574      case MP_ADDED:
575        /* We're in multilink mode ! */
576        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
577        bundle_CalculateBandwidth(dl->bundle);
578        break;
579      case MP_FAILED:
580        datalink_AuthNotOk(dl);
581        return;
582    }
583  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
584    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
585    datalink_NewState(dl, DATALINK_OPEN);
586    bundle_CalculateBandwidth(dl->bundle);
587    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
588    return;
589  } else {
590    dl->bundle->ncp.mp.peer = dl->peer;
591    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
592    auth_Select(dl->bundle, dl->peer.authname);
593  }
594
595  if (ccpok) {
596    fsm_Up(&dl->physical->link.ccp.fsm);
597    fsm_Open(&dl->physical->link.ccp.fsm);
598  }
599  datalink_NewState(dl, DATALINK_OPEN);
600  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
601  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
602}
603
604void
605datalink_CBCPComplete(struct datalink *dl)
606{
607  datalink_NewState(dl, DATALINK_LCP);
608  datalink_AuthReInit(dl);
609  fsm_Close(&dl->physical->link.lcp.fsm);
610}
611
612void
613datalink_CBCPFailed(struct datalink *dl)
614{
615  cbcp_Down(&dl->cbcp);
616  datalink_CBCPComplete(dl);
617}
618
619void
620datalink_AuthOk(struct datalink *dl)
621{
622  if ((dl->physical->link.lcp.his_callback.opmask &
623       CALLBACK_BIT(CALLBACK_CBCP) ||
624       dl->physical->link.lcp.want_callback.opmask &
625       CALLBACK_BIT(CALLBACK_CBCP)) &&
626      !(dl->physical->link.lcp.want_callback.opmask &
627        CALLBACK_BIT(CALLBACK_AUTH))) {
628    /* We must have agreed CBCP if AUTH isn't there any more */
629    datalink_NewState(dl, DATALINK_CBCP);
630    cbcp_Up(&dl->cbcp);
631  } else if (dl->physical->link.lcp.want_callback.opmask) {
632    /* It's not CBCP */
633    log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
634    datalink_NewState(dl, DATALINK_LCP);
635    datalink_AuthReInit(dl);
636    fsm_Close(&dl->physical->link.lcp.fsm);
637  } else
638    switch (dl->physical->link.lcp.his_callback.opmask) {
639      case 0:
640        datalink_NCPUp(dl);
641        break;
642
643      case CALLBACK_BIT(CALLBACK_AUTH):
644        auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
645                          sizeof dl->cbcp.fsm.phone);
646        if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
647          log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
648                     dl->peer.authname);
649          *dl->cbcp.fsm.phone = '\0';
650        } else {
651          char *ptr = strchr(dl->cbcp.fsm.phone, ',');
652          if (ptr)
653            *ptr = '\0';	/* Call back on the first number */
654          log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
655                     dl->cbcp.fsm.phone);
656          dl->cbcp.required = 1;
657        }
658        dl->cbcp.fsm.delay = 0;
659        datalink_NewState(dl, DATALINK_LCP);
660        datalink_AuthReInit(dl);
661        fsm_Close(&dl->physical->link.lcp.fsm);
662        break;
663
664      case CALLBACK_BIT(CALLBACK_E164):
665        strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
666                sizeof dl->cbcp.fsm.phone - 1);
667        dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
668        log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
669                   dl->cbcp.fsm.phone);
670        dl->cbcp.required = 1;
671        dl->cbcp.fsm.delay = 0;
672        datalink_NewState(dl, DATALINK_LCP);
673        datalink_AuthReInit(dl);
674        fsm_Close(&dl->physical->link.lcp.fsm);
675        break;
676
677      default:
678        log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
679                   dl->name);
680        datalink_NewState(dl, DATALINK_LCP);
681        datalink_AuthReInit(dl);
682        fsm_Close(&dl->physical->link.lcp.fsm);
683        break;
684    }
685}
686
687void
688datalink_AuthNotOk(struct datalink *dl)
689{
690  datalink_NewState(dl, DATALINK_LCP);
691  datalink_AuthReInit(dl);
692  fsm_Close(&dl->physical->link.lcp.fsm);
693}
694
695static void
696datalink_LayerDown(void *v, struct fsm *fp)
697{
698  /* The given FSM has been told to come down */
699  struct datalink *dl = (struct datalink *)v;
700
701  if (fp->proto == PROTO_LCP) {
702    switch (dl->state) {
703      case DATALINK_OPEN:
704        peerid_Init(&dl->peer);
705        fsm2initial(&dl->physical->link.ccp.fsm);
706        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
707        (*dl->parent->LayerDown)(dl->parent->object, fp);
708        /* fall through (just in case) */
709
710      case DATALINK_CBCP:
711        if (!dl->cbcp.required)
712          cbcp_Down(&dl->cbcp);
713        /* fall through (just in case) */
714
715      case DATALINK_AUTH:
716        timer_Stop(&dl->pap.authtimer);
717        timer_Stop(&dl->chap.auth.authtimer);
718    }
719    datalink_NewState(dl, DATALINK_LCP);
720    datalink_AuthReInit(dl);
721  }
722}
723
724static void
725datalink_LayerFinish(void *v, struct fsm *fp)
726{
727  /* The given fsm is now down */
728  struct datalink *dl = (struct datalink *)v;
729
730  if (fp->proto == PROTO_LCP) {
731    fsm2initial(fp);
732    (*dl->parent->LayerFinish)(dl->parent->object, fp);
733    datalink_ComeDown(dl, CLOSE_NORMAL);
734  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
735    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
736}
737
738struct datalink *
739datalink_Create(const char *name, struct bundle *bundle, int type)
740{
741  struct datalink *dl;
742
743  dl = (struct datalink *)malloc(sizeof(struct datalink));
744  if (dl == NULL)
745    return dl;
746
747  dl->desc.type = DATALINK_DESCRIPTOR;
748  dl->desc.UpdateSet = datalink_UpdateSet;
749  dl->desc.IsSet = datalink_IsSet;
750  dl->desc.Read = datalink_Read;
751  dl->desc.Write = datalink_Write;
752
753  dl->state = DATALINK_CLOSED;
754
755  *dl->cfg.script.dial = '\0';
756  *dl->cfg.script.login = '\0';
757  *dl->cfg.script.hangup = '\0';
758  *dl->cfg.phone.list = '\0';
759  *dl->phone.list = '\0';
760  dl->phone.next = NULL;
761  dl->phone.alt = NULL;
762  dl->phone.chosen = "N/A";
763  dl->stayonline = 0;
764  dl->script.run = 1;
765  dl->script.packetmode = 1;
766  mp_linkInit(&dl->mp);
767
768  dl->bundle = bundle;
769  dl->next = NULL;
770
771  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
772
773  dl->dial.tries = 0;
774  dl->cfg.dial.max = 1;
775  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
776  dl->cfg.dial.timeout = DIAL_TIMEOUT;
777  dl->cfg.dial.inc = 0;
778  dl->cfg.dial.maxinc = 10;
779
780  dl->reconnect_tries = 0;
781  dl->cfg.reconnect.max = 0;
782  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
783
784  dl->cfg.callback.opmask = 0;
785  dl->cfg.cbcp.delay = 0;
786  *dl->cfg.cbcp.phone = '\0';
787  dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
788
789  dl->name = strdup(name);
790  peerid_Init(&dl->peer);
791  dl->parent = &bundle->fsm;
792  dl->fsmp.LayerStart = datalink_LayerStart;
793  dl->fsmp.LayerUp = datalink_LayerUp;
794  dl->fsmp.LayerDown = datalink_LayerDown;
795  dl->fsmp.LayerFinish = datalink_LayerFinish;
796  dl->fsmp.object = dl;
797
798  if ((dl->physical = physical_Create(dl, type)) == NULL) {
799    free(dl->name);
800    free(dl);
801    return NULL;
802  }
803
804  pap_Init(&dl->pap, dl->physical);
805  chap_Init(&dl->chap, dl->physical);
806  cbcp_Init(&dl->cbcp, dl->physical);
807  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
808
809  log_Printf(LogPHASE, "%s: Created in %s state\n",
810             dl->name, datalink_State(dl));
811
812  return dl;
813}
814
815struct datalink *
816datalink_Clone(struct datalink *odl, const char *name)
817{
818  struct datalink *dl;
819
820  dl = (struct datalink *)malloc(sizeof(struct datalink));
821  if (dl == NULL)
822    return dl;
823
824  dl->desc.type = DATALINK_DESCRIPTOR;
825  dl->desc.UpdateSet = datalink_UpdateSet;
826  dl->desc.IsSet = datalink_IsSet;
827  dl->desc.Read = datalink_Read;
828  dl->desc.Write = datalink_Write;
829
830  dl->state = DATALINK_CLOSED;
831
832  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
833  mp_linkInit(&dl->mp);
834  *dl->phone.list = '\0';
835  dl->phone.next = NULL;
836  dl->phone.alt = NULL;
837  dl->phone.chosen = "N/A";
838  dl->bundle = odl->bundle;
839  dl->next = NULL;
840  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
841  dl->dial.tries = 0;
842  dl->reconnect_tries = 0;
843  dl->name = strdup(name);
844  peerid_Init(&dl->peer);
845  dl->parent = odl->parent;
846  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
847  dl->fsmp.object = dl;
848
849  if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
850    free(dl->name);
851    free(dl);
852    return NULL;
853  }
854  pap_Init(&dl->pap, dl->physical);
855  dl->pap.cfg = odl->pap.cfg;
856
857  chap_Init(&dl->chap, dl->physical);
858  dl->chap.auth.cfg = odl->chap.auth.cfg;
859
860  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
861  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
862         sizeof dl->physical->link.lcp.cfg);
863  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
864         sizeof dl->physical->link.ccp.cfg);
865  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
866         sizeof dl->physical->async.cfg);
867
868  cbcp_Init(&dl->cbcp, dl->physical);
869  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
870
871  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
872             dl->name, datalink_State(dl));
873
874  return dl;
875}
876
877struct datalink *
878datalink_Destroy(struct datalink *dl)
879{
880  struct datalink *result;
881
882  if (dl->state != DATALINK_CLOSED) {
883    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
884              datalink_State(dl));
885    switch (dl->state) {
886      case DATALINK_HANGUP:
887      case DATALINK_DIAL:
888      case DATALINK_LOGIN:
889        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
890        break;
891    }
892  }
893
894  timer_Stop(&dl->dial.timer);
895  result = dl->next;
896  physical_Destroy(dl->physical);
897  free(dl->name);
898  free(dl);
899
900  return result;
901}
902
903void
904datalink_Up(struct datalink *dl, int runscripts, int packetmode)
905{
906  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
907    /* Ignore scripts */
908    runscripts = 0;
909
910  switch (dl->state) {
911    case DATALINK_CLOSED:
912      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
913          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
914        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
915      datalink_NewState(dl, DATALINK_OPENING);
916      dl->reconnect_tries =
917        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
918      dl->dial.tries = dl->cfg.dial.max;
919      dl->script.run = runscripts;
920      dl->script.packetmode = packetmode;
921      break;
922
923    case DATALINK_OPENING:
924      if (!dl->script.run && runscripts)
925        dl->script.run = 1;
926      /* fall through */
927
928    case DATALINK_DIAL:
929    case DATALINK_LOGIN:
930    case DATALINK_READY:
931      if (!dl->script.packetmode && packetmode) {
932        dl->script.packetmode = 1;
933        if (dl->state == DATALINK_READY)
934          datalink_LoginDone(dl);
935      }
936      break;
937  }
938}
939
940void
941datalink_Close(struct datalink *dl, int how)
942{
943  /* Please close */
944  switch (dl->state) {
945    case DATALINK_OPEN:
946      peerid_Init(&dl->peer);
947      fsm2initial(&dl->physical->link.ccp.fsm);
948      /* fall through */
949
950    case DATALINK_CBCP:
951    case DATALINK_AUTH:
952    case DATALINK_LCP:
953      datalink_AuthReInit(dl);
954      fsm_Close(&dl->physical->link.lcp.fsm);
955      if (how != CLOSE_NORMAL) {
956        dl->dial.tries = -1;
957        dl->reconnect_tries = 0;
958        if (how == CLOSE_LCP)
959          dl->stayonline = 1;
960      }
961      /* fall through */
962
963    default:
964      datalink_ComeDown(dl, how);
965  }
966}
967
968void
969datalink_Down(struct datalink *dl, int how)
970{
971  /* Carrier is lost */
972  switch (dl->state) {
973    case DATALINK_OPEN:
974      peerid_Init(&dl->peer);
975      fsm2initial(&dl->physical->link.ccp.fsm);
976      /* fall through */
977
978    case DATALINK_CBCP:
979    case DATALINK_AUTH:
980    case DATALINK_LCP:
981      fsm2initial(&dl->physical->link.lcp.fsm);
982      /* fall through */
983
984    default:
985      datalink_ComeDown(dl, how);
986  }
987}
988
989void
990datalink_StayDown(struct datalink *dl)
991{
992  dl->reconnect_tries = 0;
993}
994
995void
996datalink_DontHangup(struct datalink *dl)
997{
998  if (dl->state >= DATALINK_LCP)
999    dl->stayonline = 1;
1000}
1001
1002int
1003datalink_Show(struct cmdargs const *arg)
1004{
1005  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1006  prompt_Printf(arg->prompt, " State:              %s\n",
1007                datalink_State(arg->cx));
1008  prompt_Printf(arg->prompt, " Peer name:          ");
1009  if (*arg->cx->peer.authname)
1010    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1011  else if (arg->cx->state == DATALINK_OPEN)
1012    prompt_Printf(arg->prompt, "None requested\n");
1013  else
1014    prompt_Printf(arg->prompt, "N/A\n");
1015  prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1016                mp_Enddisc(arg->cx->peer.enddisc.class,
1017                           arg->cx->peer.enddisc.address,
1018                           arg->cx->peer.enddisc.len));
1019
1020  prompt_Printf(arg->prompt, "\nDefaults:\n");
1021  prompt_Printf(arg->prompt, " Phone List:         %s\n",
1022                arg->cx->cfg.phone.list);
1023  if (arg->cx->cfg.dial.max)
1024    prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1025                  arg->cx->cfg.dial.max);
1026  else
1027    prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1028  if (arg->cx->cfg.dial.next_timeout >= 0)
1029    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1030  else
1031    prompt_Printf(arg->prompt, "random/");
1032  if (arg->cx->cfg.dial.timeout >= 0)
1033    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1034  else
1035    prompt_Printf(arg->prompt, "random\n");
1036  prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1037                arg->cx->cfg.reconnect.max);
1038  if (arg->cx->cfg.reconnect.timeout > 0)
1039    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1040  else
1041    prompt_Printf(arg->prompt, "random\n");
1042  prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1043                PHYS_DIRECT ?  "accepted: " : "requested:");
1044  if (!arg->cx->cfg.callback.opmask)
1045    prompt_Printf(arg->prompt, "none\n");
1046  else {
1047    int comma = 0;
1048
1049    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1050      prompt_Printf(arg->prompt, "none");
1051      comma = 1;
1052    }
1053    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1054      prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1055      comma = 1;
1056    }
1057    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1058      prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1059      if (arg->cx->physical->type != PHYS_DIRECT)
1060        prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1061      comma = 1;
1062    }
1063    if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1064      prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1065      prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1066                    arg->cx->cfg.cbcp.delay);
1067      prompt_Printf(arg->prompt, "                     phone: ");
1068      if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1069        if (arg->cx->physical->type & PHYS_DIRECT)
1070          prompt_Printf(arg->prompt, "Caller decides\n");
1071        else
1072          prompt_Printf(arg->prompt, "Dialback server decides\n");
1073      } else
1074        prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1075      prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1076                    arg->cx->cfg.cbcp.fsmretry);
1077    } else
1078      prompt_Printf(arg->prompt, "\n");
1079  }
1080
1081  prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1082                arg->cx->cfg.script.dial);
1083  prompt_Printf(arg->prompt, " Login Script:       %s\n",
1084                arg->cx->cfg.script.login);
1085  prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1086                arg->cx->cfg.script.hangup);
1087  return 0;
1088}
1089
1090int
1091datalink_SetReconnect(struct cmdargs const *arg)
1092{
1093  if (arg->argc == arg->argn+2) {
1094    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1095    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1096    return 0;
1097  }
1098  return -1;
1099}
1100
1101int
1102datalink_SetRedial(struct cmdargs const *arg)
1103{
1104  const char *sep, *osep;
1105  int timeout, inc, maxinc, tries;
1106
1107  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1108    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1109	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1110      arg->cx->cfg.dial.timeout = -1;
1111      randinit();
1112    } else {
1113      timeout = atoi(arg->argv[arg->argn]);
1114
1115      if (timeout >= 0)
1116	arg->cx->cfg.dial.timeout = timeout;
1117      else {
1118	log_Printf(LogWARN, "Invalid redial timeout\n");
1119	return -1;
1120      }
1121    }
1122
1123    sep = strchr(arg->argv[arg->argn], '+');
1124    if (sep) {
1125      inc = atoi(++sep);
1126      osep = sep;
1127      if (inc >= 0)
1128        arg->cx->cfg.dial.inc = inc;
1129      else {
1130        log_Printf(LogWARN, "Invalid timeout increment\n");
1131        return -1;
1132      }
1133      sep = strchr(sep, '-');
1134      if (sep) {
1135        maxinc = atoi(++sep);
1136        if (maxinc >= 0)
1137          arg->cx->cfg.dial.maxinc = maxinc;
1138        else {
1139          log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1140          return -1;
1141        }
1142      } else {
1143        /* Default timeout increment */
1144        arg->cx->cfg.dial.maxinc = 10;
1145        sep = osep;
1146      }
1147    } else {
1148      /* Default timeout increment & max increment */
1149      arg->cx->cfg.dial.inc = 0;
1150      arg->cx->cfg.dial.maxinc = 10;
1151      sep = arg->argv[arg->argn];
1152    }
1153
1154    sep = strchr(sep, '.');
1155    if (sep) {
1156      if (strcasecmp(++sep, "random") == 0) {
1157	arg->cx->cfg.dial.next_timeout = -1;
1158	randinit();
1159      } else {
1160	timeout = atoi(sep);
1161	if (timeout >= 0)
1162	  arg->cx->cfg.dial.next_timeout = timeout;
1163	else {
1164	  log_Printf(LogWARN, "Invalid next redial timeout\n");
1165	  return -1;
1166	}
1167      }
1168    } else
1169      /* Default next timeout */
1170      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1171
1172    if (arg->argc == arg->argn+2) {
1173      tries = atoi(arg->argv[arg->argn+1]);
1174
1175      if (tries >= 0) {
1176	arg->cx->cfg.dial.max = tries;
1177      } else {
1178	log_Printf(LogWARN, "Invalid retry value\n");
1179	return 1;
1180      }
1181    }
1182    return 0;
1183  }
1184
1185  return -1;
1186}
1187
1188static const char *states[] = {
1189  "closed",
1190  "opening",
1191  "hangup",
1192  "dial",
1193  "carrier",
1194  "login",
1195  "ready",
1196  "lcp",
1197  "auth",
1198  "cbcp",
1199  "open"
1200};
1201
1202const char *
1203datalink_State(struct datalink *dl)
1204{
1205  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1206    return "unknown";
1207  return states[dl->state];
1208}
1209
1210static void
1211datalink_NewState(struct datalink *dl, int state)
1212{
1213  if (state != dl->state) {
1214    if (state >= 0 && state < sizeof states / sizeof states[0]) {
1215      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1216                 states[state]);
1217      dl->state = state;
1218    } else
1219      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1220  }
1221}
1222
1223struct datalink *
1224iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1225             int fd)
1226{
1227  struct datalink *dl, *cdl;
1228  struct fsm_retry copy;
1229  char *oname;
1230
1231  dl = (struct datalink *)iov[(*niov)++].iov_base;
1232  dl->name = iov[*niov].iov_base;
1233
1234  if (dl->name[DATALINK_MAXNAME-1]) {
1235    dl->name[DATALINK_MAXNAME-1] = '\0';
1236    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1237      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1238  }
1239
1240  /* Make sure the name is unique ! */
1241  oname = NULL;
1242  do {
1243    for (cdl = bundle->links; cdl; cdl = cdl->next)
1244      if (!strcasecmp(dl->name, cdl->name)) {
1245        if (oname)
1246          free(datalink_NextName(dl));
1247        else
1248          oname = datalink_NextName(dl);
1249        break;	/* Keep renaming 'till we have no conflicts */
1250      }
1251  } while (cdl);
1252
1253  if (oname) {
1254    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1255    free(oname);
1256  } else {
1257    dl->name = strdup(dl->name);
1258    free(iov[*niov].iov_base);
1259  }
1260  (*niov)++;
1261
1262  dl->desc.type = DATALINK_DESCRIPTOR;
1263  dl->desc.UpdateSet = datalink_UpdateSet;
1264  dl->desc.IsSet = datalink_IsSet;
1265  dl->desc.Read = datalink_Read;
1266  dl->desc.Write = datalink_Write;
1267
1268  mp_linkInit(&dl->mp);
1269  *dl->phone.list = '\0';
1270  dl->phone.next = NULL;
1271  dl->phone.alt = NULL;
1272  dl->phone.chosen = "N/A";
1273
1274  dl->bundle = bundle;
1275  dl->next = NULL;
1276  memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1277  dl->dial.tries = 0;
1278  dl->reconnect_tries = 0;
1279  dl->parent = &bundle->fsm;
1280  dl->fsmp.LayerStart = datalink_LayerStart;
1281  dl->fsmp.LayerUp = datalink_LayerUp;
1282  dl->fsmp.LayerDown = datalink_LayerDown;
1283  dl->fsmp.LayerFinish = datalink_LayerFinish;
1284  dl->fsmp.object = dl;
1285
1286  dl->physical = iov2physical(dl, iov, niov, maxiov, fd);
1287
1288  if (!dl->physical) {
1289    free(dl->name);
1290    free(dl);
1291    dl = NULL;
1292  } else {
1293    copy = dl->pap.cfg.fsm;
1294    pap_Init(&dl->pap, dl->physical);
1295    dl->pap.cfg.fsm = copy;
1296
1297    copy = dl->chap.auth.cfg.fsm;
1298    chap_Init(&dl->chap, dl->physical);
1299    dl->chap.auth.cfg.fsm = copy;
1300
1301    cbcp_Init(&dl->cbcp, dl->physical);
1302    chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
1303
1304    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1305              dl->name, datalink_State(dl));
1306  }
1307
1308  return dl;
1309}
1310
1311int
1312datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1313             pid_t newpid)
1314{
1315  /* If `dl' is NULL, we're allocating before a Fromiov() */
1316  int link_fd;
1317
1318  if (dl) {
1319    timer_Stop(&dl->dial.timer);
1320    /* The following is purely for the sake of paranoia */
1321    cbcp_Down(&dl->cbcp);
1322    timer_Stop(&dl->pap.authtimer);
1323    timer_Stop(&dl->chap.auth.authtimer);
1324  }
1325
1326  if (*niov >= maxiov - 1) {
1327    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1328    if (dl) {
1329      free(dl->name);
1330      free(dl);
1331    }
1332    return -1;
1333  }
1334
1335  iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl);
1336  iov[(*niov)++].iov_len = sizeof *dl;
1337  iov[*niov].iov_base =
1338    dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME);
1339  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1340
1341  link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, newpid);
1342
1343  if (link_fd == -1 && dl) {
1344    free(dl->name);
1345    free(dl);
1346  }
1347
1348  return link_fd;
1349}
1350
1351void
1352datalink_Rename(struct datalink *dl, const char *name)
1353{
1354  free(dl->name);
1355  dl->physical->link.name = dl->name = strdup(name);
1356}
1357
1358char *
1359datalink_NextName(struct datalink *dl)
1360{
1361  int f, n;
1362  char *name, *oname;
1363
1364  n = strlen(dl->name);
1365  name = (char *)malloc(n+3);
1366  for (f = n - 1; f >= 0; f--)
1367    if (!isdigit(dl->name[f]))
1368      break;
1369  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1370  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1371  oname = dl->name;
1372  dl->name = name;
1373  /* our physical link name isn't updated (it probably isn't created yet) */
1374  return oname;
1375}
1376
1377int
1378datalink_SetMode(struct datalink *dl, int mode)
1379{
1380  if (!physical_SetMode(dl->physical, mode))
1381    return 0;
1382  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1383    dl->script.run = 0;
1384  if (dl->physical->type == PHYS_DIRECT)
1385    dl->reconnect_tries = 0;
1386  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND) && dl->state <= DATALINK_READY)
1387    datalink_Up(dl, 1, 1);
1388  return 1;
1389}
1390
1391int
1392datalink_GetDialTimeout(struct datalink *dl)
1393{
1394  int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1395
1396  if (dl->dial.incs < dl->cfg.dial.maxinc)
1397    dl->dial.incs++;
1398
1399  return result;
1400}
1401