datalink.c revision 37192 
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 *	$Id: datalink.c,v 1.13 1998/06/25 22:33:17 brian Exp $
27 */
28
29#include <sys/types.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 "mbuf.h"
43#include "log.h"
44#include "defs.h"
45#include "timer.h"
46#include "fsm.h"
47#include "lcp.h"
48#include "descriptor.h"
49#include "lqr.h"
50#include "hdlc.h"
51#include "async.h"
52#include "throughput.h"
53#include "ccp.h"
54#include "link.h"
55#include "physical.h"
56#include "iplist.h"
57#include "slcompress.h"
58#include "ipcp.h"
59#include "filter.h"
60#include "mp.h"
61#include "bundle.h"
62#include "chat.h"
63#include "auth.h"
64#include "modem.h"
65#include "prompt.h"
66#include "lcpproto.h"
67#include "pap.h"
68#include "chap.h"
69#include "command.h"
70#include "datalink.h"
71
72static void datalink_LoginDone(struct datalink *);
73static void datalink_NewState(struct datalink *, int);
74
75static void
76datalink_OpenTimeout(void *v)
77{
78  struct datalink *dl = (struct datalink *)v;
79
80  timer_Stop(&dl->dial_timer);
81  if (dl->state == DATALINK_OPENING)
82    log_Printf(LogPHASE, "%s: Redial timer expired.\n", dl->name);
83}
84
85static void
86datalink_StartDialTimer(struct datalink *dl, int Timeout)
87{
88  timer_Stop(&dl->dial_timer);
89
90  if (Timeout) {
91    if (Timeout > 0)
92      dl->dial_timer.load = Timeout * SECTICKS;
93    else
94      dl->dial_timer.load = (random() % DIAL_TIMEOUT) * SECTICKS;
95    dl->dial_timer.func = datalink_OpenTimeout;
96    dl->dial_timer.name = "dial";
97    dl->dial_timer.arg = dl;
98    timer_Start(&dl->dial_timer);
99    if (dl->state == DATALINK_OPENING)
100      log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
101                dl->name, Timeout);
102  }
103}
104
105static void
106datalink_HangupDone(struct datalink *dl)
107{
108  if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
109      physical_GetFD(dl->physical) != -1) {
110    /* Don't close our modem if the link is dedicated */
111    datalink_LoginDone(dl);
112    return;
113  }
114
115  modem_Close(dl->physical);
116  dl->phone.chosen = "N/A";
117
118  if (dl->bundle->CleaningUp ||
119      (dl->physical->type == PHYS_DIRECT) ||
120      ((!dl->dial_tries || (dl->dial_tries < 0 && !dl->reconnect_tries)) &&
121       !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
122    datalink_NewState(dl, DATALINK_CLOSED);
123    dl->dial_tries = -1;
124    dl->reconnect_tries = 0;
125    bundle_LinkClosed(dl->bundle, dl);
126    if (!dl->bundle->CleaningUp)
127      datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
128  } else {
129    datalink_NewState(dl, DATALINK_OPENING);
130    if (dl->dial_tries < 0) {
131      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
132      dl->dial_tries = dl->cfg.dial.max;
133      dl->reconnect_tries--;
134    } else {
135      if (dl->phone.next == NULL)
136        datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
137      else
138        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
139    }
140  }
141}
142
143static const char *
144datalink_ChoosePhoneNumber(struct datalink *dl)
145{
146  char *phone;
147
148  if (dl->phone.alt == NULL) {
149    if (dl->phone.next == NULL) {
150      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
151      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
152      dl->phone.next = dl->phone.list;
153    }
154    dl->phone.alt = strsep(&dl->phone.next, ":");
155  }
156  phone = strsep(&dl->phone.alt, "|");
157  dl->phone.chosen = *phone ? phone : "[NONE]";
158  if (*phone)
159    log_Printf(LogPHASE, "Phone: %s\n", phone);
160  return phone;
161}
162
163static void
164datalink_LoginDone(struct datalink *dl)
165{
166  if (!dl->script.packetmode) {
167    dl->dial_tries = -1;
168    datalink_NewState(dl, DATALINK_READY);
169  } else if (modem_Raw(dl->physical, dl->bundle) < 0) {
170    dl->dial_tries = 0;
171    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
172    if (dl->script.run) {
173      datalink_NewState(dl, DATALINK_HANGUP);
174      modem_Offline(dl->physical);
175      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
176    } else {
177      if (dl->physical->type == PHYS_DEDICATED)
178        /* force a redial timeout */
179        modem_Close(dl->physical);
180      datalink_HangupDone(dl);
181    }
182  } else {
183    dl->dial_tries = -1;
184
185    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
186    async_Init(&dl->physical->async);
187
188    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
189              0 : dl->physical->link.lcp.cfg.openmode);
190    ccp_Setup(&dl->physical->link.ccp);
191
192    datalink_NewState(dl, DATALINK_LCP);
193    fsm_Up(&dl->physical->link.lcp.fsm);
194    fsm_Open(&dl->physical->link.lcp.fsm);
195  }
196}
197
198static int
199datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
200                   int *n)
201{
202  struct datalink *dl = descriptor2datalink(d);
203  int result;
204
205  result = 0;
206  switch (dl->state) {
207    case DATALINK_CLOSED:
208      if ((dl->physical->type &
209           (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|PHYS_DDIAL)) &&
210          !bundle_IsDead(dl->bundle))
211        /*
212         * Our first time in - DEDICATED & DDIAL never come down, and
213         * DIRECT & BACKGROUND get deleted when they enter DATALINK_CLOSED.
214         * Go to DATALINK_OPENING via datalink_Up() and fall through.
215         */
216        datalink_Up(dl, 1, 1);
217      else
218        break;
219      /* fall through */
220
221    case DATALINK_OPENING:
222      if (dl->dial_timer.state != TIMER_RUNNING) {
223        if (--dl->dial_tries < 0)
224          dl->dial_tries = 0;
225        if (modem_Open(dl->physical, dl->bundle) >= 0) {
226          if (dl->script.run) {
227            datalink_NewState(dl, DATALINK_DIAL);
228            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial, 1,
229                      datalink_ChoosePhoneNumber(dl));
230            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
231                dl->cfg.dial.max)
232              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
233                        dl->name, dl->cfg.dial.max - dl->dial_tries,
234                        dl->cfg.dial.max);
235            return datalink_UpdateSet(d, r, w, e, n);
236          } else
237            datalink_LoginDone(dl);
238        } else {
239          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
240              dl->cfg.dial.max)
241            log_Printf(LogCHAT, "Failed to open modem (attempt %u of %d)\n",
242                      dl->cfg.dial.max - dl->dial_tries, dl->cfg.dial.max);
243          else
244            log_Printf(LogCHAT, "Failed to open modem\n");
245
246          if (dl->bundle->CleaningUp ||
247              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
248               dl->cfg.dial.max && dl->dial_tries == 0)) {
249            datalink_NewState(dl, DATALINK_CLOSED);
250            dl->reconnect_tries = 0;
251            dl->dial_tries = -1;
252            bundle_LinkClosed(dl->bundle, dl);
253          }
254          if (!dl->bundle->CleaningUp)
255            datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
256        }
257      }
258      break;
259
260    case DATALINK_HANGUP:
261    case DATALINK_DIAL:
262    case DATALINK_LOGIN:
263      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
264      switch (dl->chat.state) {
265        case CHAT_DONE:
266          /* script succeeded */
267          chat_Destroy(&dl->chat);
268          switch(dl->state) {
269            case DATALINK_HANGUP:
270              datalink_HangupDone(dl);
271              break;
272            case DATALINK_DIAL:
273              datalink_NewState(dl, DATALINK_LOGIN);
274              chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, 0, NULL);
275              return datalink_UpdateSet(d, r, w, e, n);
276            case DATALINK_LOGIN:
277              datalink_LoginDone(dl);
278              break;
279          }
280          break;
281        case CHAT_FAILED:
282          /* Going down - script failed */
283          log_Printf(LogWARN, "Chat script failed\n");
284          chat_Destroy(&dl->chat);
285          switch(dl->state) {
286            case DATALINK_HANGUP:
287              datalink_HangupDone(dl);
288              break;
289            case DATALINK_DIAL:
290            case DATALINK_LOGIN:
291              datalink_NewState(dl, DATALINK_HANGUP);
292              modem_Offline(dl->physical);
293              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
294              return datalink_UpdateSet(d, r, w, e, n);
295          }
296          break;
297      }
298      break;
299
300    case DATALINK_READY:
301    case DATALINK_LCP:
302    case DATALINK_AUTH:
303    case DATALINK_OPEN:
304      result = descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
305      break;
306  }
307  return result;
308}
309
310int
311datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
312{
313  return physical_RemoveFromSet(dl->physical, r, w, e);
314}
315
316static int
317datalink_IsSet(struct descriptor *d, const fd_set *fdset)
318{
319  struct datalink *dl = descriptor2datalink(d);
320
321  switch (dl->state) {
322    case DATALINK_CLOSED:
323    case DATALINK_OPENING:
324      break;
325
326    case DATALINK_HANGUP:
327    case DATALINK_DIAL:
328    case DATALINK_LOGIN:
329      return descriptor_IsSet(&dl->chat.desc, fdset);
330
331    case DATALINK_READY:
332    case DATALINK_LCP:
333    case DATALINK_AUTH:
334    case DATALINK_OPEN:
335      return descriptor_IsSet(&dl->physical->desc, fdset);
336  }
337  return 0;
338}
339
340static void
341datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
342{
343  struct datalink *dl = descriptor2datalink(d);
344
345  switch (dl->state) {
346    case DATALINK_CLOSED:
347    case DATALINK_OPENING:
348      break;
349
350    case DATALINK_HANGUP:
351    case DATALINK_DIAL:
352    case DATALINK_LOGIN:
353      descriptor_Read(&dl->chat.desc, bundle, fdset);
354      break;
355
356    case DATALINK_READY:
357    case DATALINK_LCP:
358    case DATALINK_AUTH:
359    case DATALINK_OPEN:
360      descriptor_Read(&dl->physical->desc, bundle, fdset);
361      break;
362  }
363}
364
365static int
366datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
367{
368  struct datalink *dl = descriptor2datalink(d);
369  int result = 0;
370
371  switch (dl->state) {
372    case DATALINK_CLOSED:
373    case DATALINK_OPENING:
374      break;
375
376    case DATALINK_HANGUP:
377    case DATALINK_DIAL:
378    case DATALINK_LOGIN:
379      result = descriptor_Write(&dl->chat.desc, bundle, fdset);
380      break;
381
382    case DATALINK_READY:
383    case DATALINK_LCP:
384    case DATALINK_AUTH:
385    case DATALINK_OPEN:
386      result = descriptor_Write(&dl->physical->desc, bundle, fdset);
387      break;
388  }
389
390  return result;
391}
392
393static void
394datalink_ComeDown(struct datalink *dl, int how)
395{
396  if (how != CLOSE_NORMAL) {
397    dl->dial_tries = -1;
398    dl->reconnect_tries = 0;
399    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
400      dl->stayonline = 1;
401  }
402
403  if (dl->state >= DATALINK_READY && dl->stayonline) {
404    dl->stayonline = 0;
405    datalink_NewState(dl, DATALINK_READY);
406  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
407    modem_Offline(dl->physical);
408    if (dl->script.run && dl->state != DATALINK_OPENING) {
409      datalink_NewState(dl, DATALINK_HANGUP);
410      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
411    } else
412      datalink_HangupDone(dl);
413  }
414}
415
416static void
417datalink_LayerStart(void *v, struct fsm *fp)
418{
419  /* The given FSM is about to start up ! */
420  struct datalink *dl = (struct datalink *)v;
421
422  if (fp->proto == PROTO_LCP)
423    (*dl->parent->LayerStart)(dl->parent->object, fp);
424}
425
426static void
427datalink_LayerUp(void *v, struct fsm *fp)
428{
429  /* The given fsm is now up */
430  struct datalink *dl = (struct datalink *)v;
431
432  if (fp->proto == PROTO_LCP) {
433    datalink_GotAuthname(dl, "", 0);
434    dl->physical->link.lcp.auth_ineed = dl->physical->link.lcp.want_auth;
435    dl->physical->link.lcp.auth_iwait = dl->physical->link.lcp.his_auth;
436    if (dl->physical->link.lcp.his_auth || dl->physical->link.lcp.want_auth) {
437      if (bundle_Phase(dl->bundle) == PHASE_ESTABLISH)
438        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
439      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
440                Auth2Nam(dl->physical->link.lcp.his_auth),
441                Auth2Nam(dl->physical->link.lcp.want_auth));
442      if (dl->physical->link.lcp.his_auth == PROTO_PAP)
443        auth_StartChallenge(&dl->pap, dl->physical, pap_SendChallenge);
444      if (dl->physical->link.lcp.want_auth == PROTO_CHAP)
445        auth_StartChallenge(&dl->chap.auth, dl->physical, chap_SendChallenge);
446    } else
447      datalink_AuthOk(dl);
448  }
449}
450
451void
452datalink_GotAuthname(struct datalink *dl, const char *name, int len)
453{
454  if (len >= sizeof dl->peer.authname)
455    len = sizeof dl->peer.authname - 1;
456  strncpy(dl->peer.authname, name, len);
457  dl->peer.authname[len] = '\0';
458}
459
460void
461datalink_AuthOk(struct datalink *dl)
462{
463  ccp_SetOpenMode(&dl->physical->link.ccp);
464
465  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
466    /* we've authenticated in multilink mode ! */
467    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
468      case MP_LINKSENT:
469        /* We've handed the link off to another ppp (well, we will soon) ! */
470        return;
471      case MP_UP:
472        /* First link in the bundle */
473        auth_Select(dl->bundle, dl->peer.authname, dl->physical);
474        /* fall through */
475      case MP_ADDED:
476        /* We're in multilink mode ! */
477        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
478        break;
479      case MP_FAILED:
480        datalink_AuthNotOk(dl);
481        return;
482    }
483  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
484    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
485    datalink_NewState(dl, DATALINK_OPEN);
486    (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
487    return;
488  } else {
489    dl->bundle->ncp.mp.peer = dl->peer;
490    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
491    auth_Select(dl->bundle, dl->peer.authname, dl->physical);
492  }
493
494  fsm_Up(&dl->physical->link.ccp.fsm);
495  fsm_Open(&dl->physical->link.ccp.fsm);
496  datalink_NewState(dl, DATALINK_OPEN);
497  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
498  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
499}
500
501void
502datalink_AuthNotOk(struct datalink *dl)
503{
504  datalink_NewState(dl, DATALINK_LCP);
505  fsm_Close(&dl->physical->link.lcp.fsm);
506}
507
508static void
509datalink_LayerDown(void *v, struct fsm *fp)
510{
511  /* The given FSM has been told to come down */
512  struct datalink *dl = (struct datalink *)v;
513
514  if (fp->proto == PROTO_LCP) {
515    switch (dl->state) {
516      case DATALINK_OPEN:
517        peerid_Init(&dl->peer);
518        fsm2initial(&dl->physical->link.ccp.fsm);
519        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
520        (*dl->parent->LayerDown)(dl->parent->object, fp);
521        /* fall through */
522
523      case DATALINK_AUTH:
524        timer_Stop(&dl->pap.authtimer);
525        timer_Stop(&dl->chap.auth.authtimer);
526    }
527    datalink_NewState(dl, DATALINK_LCP);
528  }
529}
530
531static void
532datalink_LayerFinish(void *v, struct fsm *fp)
533{
534  /* The given fsm is now down */
535  struct datalink *dl = (struct datalink *)v;
536
537  if (fp->proto == PROTO_LCP) {
538    fsm2initial(fp);
539    (*dl->parent->LayerFinish)(dl->parent->object, fp);
540    datalink_ComeDown(dl, CLOSE_NORMAL);
541  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
542    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
543}
544
545struct datalink *
546datalink_Create(const char *name, struct bundle *bundle, int type)
547{
548  struct datalink *dl;
549
550  dl = (struct datalink *)malloc(sizeof(struct datalink));
551  if (dl == NULL)
552    return dl;
553
554  dl->desc.type = DATALINK_DESCRIPTOR;
555  dl->desc.UpdateSet = datalink_UpdateSet;
556  dl->desc.IsSet = datalink_IsSet;
557  dl->desc.Read = datalink_Read;
558  dl->desc.Write = datalink_Write;
559
560  dl->state = DATALINK_CLOSED;
561
562  *dl->cfg.script.dial = '\0';
563  *dl->cfg.script.login = '\0';
564  *dl->cfg.script.hangup = '\0';
565  *dl->cfg.phone.list = '\0';
566  *dl->phone.list = '\0';
567  dl->phone.next = NULL;
568  dl->phone.alt = NULL;
569  dl->phone.chosen = "N/A";
570  dl->stayonline = 0;
571  dl->script.run = 1;
572  dl->script.packetmode = 1;
573  mp_linkInit(&dl->mp);
574
575  dl->bundle = bundle;
576  dl->next = NULL;
577
578  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
579
580  dl->dial_tries = 0;
581  dl->cfg.dial.max = 1;
582  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
583  dl->cfg.dial.timeout = DIAL_TIMEOUT;
584
585  dl->reconnect_tries = 0;
586  dl->cfg.reconnect.max = 0;
587  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
588
589  dl->name = strdup(name);
590  peerid_Init(&dl->peer);
591  dl->parent = &bundle->fsm;
592  dl->fsmp.LayerStart = datalink_LayerStart;
593  dl->fsmp.LayerUp = datalink_LayerUp;
594  dl->fsmp.LayerDown = datalink_LayerDown;
595  dl->fsmp.LayerFinish = datalink_LayerFinish;
596  dl->fsmp.object = dl;
597
598  auth_Init(&dl->pap);
599  auth_Init(&dl->chap.auth);
600
601  if ((dl->physical = modem_Create(dl, type)) == NULL) {
602    free(dl->name);
603    free(dl);
604    return NULL;
605  }
606  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
607
608  log_Printf(LogPHASE, "%s: Created in %s state\n",
609             dl->name, datalink_State(dl));
610
611  return dl;
612}
613
614struct datalink *
615datalink_Clone(struct datalink *odl, const char *name)
616{
617  struct datalink *dl;
618
619  dl = (struct datalink *)malloc(sizeof(struct datalink));
620  if (dl == NULL)
621    return dl;
622
623  dl->desc.type = DATALINK_DESCRIPTOR;
624  dl->desc.UpdateSet = datalink_UpdateSet;
625  dl->desc.IsSet = datalink_IsSet;
626  dl->desc.Read = datalink_Read;
627  dl->desc.Write = datalink_Write;
628
629  dl->state = DATALINK_CLOSED;
630
631  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
632  mp_linkInit(&dl->mp);
633  *dl->phone.list = '\0';
634  dl->phone.next = NULL;
635  dl->phone.alt = NULL;
636  dl->phone.chosen = "N/A";
637  dl->bundle = odl->bundle;
638  dl->next = NULL;
639  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
640  dl->dial_tries = 0;
641  dl->reconnect_tries = 0;
642  dl->name = strdup(name);
643  peerid_Init(&dl->peer);
644  dl->parent = odl->parent;
645  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
646  dl->fsmp.object = dl;
647  auth_Init(&dl->pap);
648  dl->pap.cfg.fsmretry = odl->pap.cfg.fsmretry;
649
650  auth_Init(&dl->chap.auth);
651  dl->chap.auth.cfg.fsmretry = odl->chap.auth.cfg.fsmretry;
652
653  if ((dl->physical = modem_Create(dl, PHYS_INTERACTIVE)) == NULL) {
654    free(dl->name);
655    free(dl);
656    return NULL;
657  }
658  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
659  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
660         sizeof dl->physical->link.lcp.cfg);
661  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
662         sizeof dl->physical->link.ccp.cfg);
663  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
664         sizeof dl->physical->async.cfg);
665
666  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
667
668  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
669             dl->name, datalink_State(dl));
670
671  return dl;
672}
673
674struct datalink *
675datalink_Destroy(struct datalink *dl)
676{
677  struct datalink *result;
678
679  if (dl->state != DATALINK_CLOSED) {
680    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
681              datalink_State(dl));
682    switch (dl->state) {
683      case DATALINK_HANGUP:
684      case DATALINK_DIAL:
685      case DATALINK_LOGIN:
686        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
687        break;
688    }
689  }
690
691  result = dl->next;
692  modem_Destroy(dl->physical);
693  free(dl->name);
694  free(dl);
695
696  return result;
697}
698
699void
700datalink_Up(struct datalink *dl, int runscripts, int packetmode)
701{
702  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
703    /* Ignore scripts */
704    runscripts = 0;
705
706  switch (dl->state) {
707    case DATALINK_CLOSED:
708      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
709          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
710        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
711      datalink_NewState(dl, DATALINK_OPENING);
712      dl->reconnect_tries =
713        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
714      dl->dial_tries = dl->cfg.dial.max;
715      dl->script.run = runscripts;
716      dl->script.packetmode = packetmode;
717      break;
718
719    case DATALINK_OPENING:
720      if (!dl->script.run && runscripts)
721        dl->script.run = 1;
722      /* fall through */
723
724    case DATALINK_DIAL:
725    case DATALINK_LOGIN:
726    case DATALINK_READY:
727      if (!dl->script.packetmode && packetmode) {
728        dl->script.packetmode = 1;
729        if (dl->state == DATALINK_READY)
730          datalink_LoginDone(dl);
731      }
732      break;
733  }
734}
735
736void
737datalink_Close(struct datalink *dl, int how)
738{
739  /* Please close */
740  switch (dl->state) {
741    case DATALINK_OPEN:
742      peerid_Init(&dl->peer);
743      fsm2initial(&dl->physical->link.ccp.fsm);
744      /* fall through */
745
746    case DATALINK_AUTH:
747    case DATALINK_LCP:
748      fsm_Close(&dl->physical->link.lcp.fsm);
749      if (how != CLOSE_NORMAL) {
750        dl->dial_tries = -1;
751        dl->reconnect_tries = 0;
752        if (how == CLOSE_LCP)
753          dl->stayonline = 1;
754      }
755      break;
756
757    default:
758      datalink_ComeDown(dl, how);
759  }
760}
761
762void
763datalink_Down(struct datalink *dl, int how)
764{
765  /* Carrier is lost */
766  switch (dl->state) {
767    case DATALINK_OPEN:
768      peerid_Init(&dl->peer);
769      fsm2initial(&dl->physical->link.ccp.fsm);
770      /* fall through */
771
772    case DATALINK_AUTH:
773    case DATALINK_LCP:
774      fsm2initial(&dl->physical->link.lcp.fsm);
775      /* fall through */
776
777    default:
778      datalink_ComeDown(dl, how);
779  }
780}
781
782void
783datalink_StayDown(struct datalink *dl)
784{
785  dl->reconnect_tries = 0;
786}
787
788void
789datalink_DontHangup(struct datalink *dl)
790{
791  if (dl->state >= DATALINK_LCP)
792    dl->stayonline = 1;
793}
794
795int
796datalink_Show(struct cmdargs const *arg)
797{
798  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
799  prompt_Printf(arg->prompt, " State:            %s\n",
800                datalink_State(arg->cx));
801  prompt_Printf(arg->prompt, " CHAP Encryption:  %s\n",
802                arg->cx->chap.using_MSChap ? "MSChap" : "MD5" );
803  prompt_Printf(arg->prompt, " Peer name:        ");
804  if (*arg->cx->peer.authname)
805    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
806  else if (arg->cx->state == DATALINK_OPEN)
807    prompt_Printf(arg->prompt, "None requested\n");
808  else
809    prompt_Printf(arg->prompt, "N/A\n");
810  prompt_Printf(arg->prompt, " Discriminator:    %s\n",
811                mp_Enddisc(arg->cx->peer.enddisc.class,
812                           arg->cx->peer.enddisc.address,
813                           arg->cx->peer.enddisc.len));
814
815  prompt_Printf(arg->prompt, "\nDefaults:\n");
816  prompt_Printf(arg->prompt, " Phone List:       %s\n",
817                arg->cx->cfg.phone.list);
818  if (arg->cx->cfg.dial.max)
819    prompt_Printf(arg->prompt, " Dial tries:       %d, delay ",
820                  arg->cx->cfg.dial.max);
821  else
822    prompt_Printf(arg->prompt, " Dial tries:       infinite, delay ");
823  if (arg->cx->cfg.dial.next_timeout > 0)
824    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
825  else
826    prompt_Printf(arg->prompt, "random/");
827  if (arg->cx->cfg.dial.timeout > 0)
828    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
829  else
830    prompt_Printf(arg->prompt, "random\n");
831  prompt_Printf(arg->prompt, " Reconnect tries:  %d, delay ",
832                arg->cx->cfg.reconnect.max);
833  if (arg->cx->cfg.reconnect.timeout > 0)
834    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
835  else
836    prompt_Printf(arg->prompt, "random\n");
837  prompt_Printf(arg->prompt, " Dial Script:      %s\n",
838                arg->cx->cfg.script.dial);
839  prompt_Printf(arg->prompt, " Login Script:     %s\n",
840                arg->cx->cfg.script.login);
841  prompt_Printf(arg->prompt, " Hangup Script:    %s\n",
842                arg->cx->cfg.script.hangup);
843  return 0;
844}
845
846int
847datalink_SetReconnect(struct cmdargs const *arg)
848{
849  if (arg->argc == arg->argn+2) {
850    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
851    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
852    return 0;
853  }
854  return -1;
855}
856
857int
858datalink_SetRedial(struct cmdargs const *arg)
859{
860  int timeout;
861  int tries;
862  char *dot;
863
864  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
865    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
866	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
867      arg->cx->cfg.dial.timeout = -1;
868      randinit();
869    } else {
870      timeout = atoi(arg->argv[arg->argn]);
871
872      if (timeout >= 0)
873	arg->cx->cfg.dial.timeout = timeout;
874      else {
875	log_Printf(LogWARN, "Invalid redial timeout\n");
876	return -1;
877      }
878    }
879
880    dot = strchr(arg->argv[arg->argn], '.');
881    if (dot) {
882      if (strcasecmp(++dot, "random") == 0) {
883	arg->cx->cfg.dial.next_timeout = -1;
884	randinit();
885      } else {
886	timeout = atoi(dot);
887	if (timeout >= 0)
888	  arg->cx->cfg.dial.next_timeout = timeout;
889	else {
890	  log_Printf(LogWARN, "Invalid next redial timeout\n");
891	  return -1;
892	}
893      }
894    } else
895      /* Default next timeout */
896      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
897
898    if (arg->argc == arg->argn+2) {
899      tries = atoi(arg->argv[arg->argn+1]);
900
901      if (tries >= 0) {
902	arg->cx->cfg.dial.max = tries;
903      } else {
904	log_Printf(LogWARN, "Invalid retry value\n");
905	return 1;
906      }
907    }
908    return 0;
909  }
910  return -1;
911}
912
913static const char *states[] = {
914  "closed",
915  "opening",
916  "hangup",
917  "dial",
918  "login",
919  "ready",
920  "lcp",
921  "auth",
922  "open"
923};
924
925const char *
926datalink_State(struct datalink *dl)
927{
928  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
929    return "unknown";
930  return states[dl->state];
931}
932
933static void
934datalink_NewState(struct datalink *dl, int state)
935{
936  if (state != dl->state) {
937    if (state >= 0 && state < sizeof states / sizeof states[0]) {
938      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
939                 states[state]);
940      dl->state = state;
941    } else
942      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
943  }
944}
945
946struct datalink *
947iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
948             int fd)
949{
950  struct datalink *dl, *cdl;
951  u_int retry;
952  char *oname;
953
954  dl = (struct datalink *)iov[(*niov)++].iov_base;
955  dl->name = iov[*niov].iov_base;
956
957  if (dl->name[DATALINK_MAXNAME-1]) {
958    dl->name[DATALINK_MAXNAME-1] = '\0';
959    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
960      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
961  }
962
963  /* Make sure the name is unique ! */
964  oname = NULL;
965  do {
966    for (cdl = bundle->links; cdl; cdl = cdl->next)
967      if (!strcasecmp(dl->name, cdl->name)) {
968        if (oname)
969          free(datalink_NextName(dl));
970        else
971          oname = datalink_NextName(dl);
972        break;	/* Keep renaming 'till we have no conflicts */
973      }
974  } while (cdl);
975
976  if (oname) {
977    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
978    free(oname);
979  } else {
980    dl->name = strdup(dl->name);
981    free(iov[*niov].iov_base);
982  }
983  (*niov)++;
984
985  dl->desc.type = DATALINK_DESCRIPTOR;
986  dl->desc.UpdateSet = datalink_UpdateSet;
987  dl->desc.IsSet = datalink_IsSet;
988  dl->desc.Read = datalink_Read;
989  dl->desc.Write = datalink_Write;
990
991  mp_linkInit(&dl->mp);
992  *dl->phone.list = '\0';
993  dl->phone.next = NULL;
994  dl->phone.alt = NULL;
995  dl->phone.chosen = "N/A";
996
997  dl->bundle = bundle;
998  dl->next = NULL;
999  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
1000  dl->dial_tries = 0;
1001  dl->reconnect_tries = 0;
1002  dl->parent = &bundle->fsm;
1003  dl->fsmp.LayerStart = datalink_LayerStart;
1004  dl->fsmp.LayerUp = datalink_LayerUp;
1005  dl->fsmp.LayerDown = datalink_LayerDown;
1006  dl->fsmp.LayerFinish = datalink_LayerFinish;
1007  dl->fsmp.object = dl;
1008
1009  retry = dl->pap.cfg.fsmretry;
1010  auth_Init(&dl->pap);
1011  dl->pap.cfg.fsmretry = retry;
1012
1013  retry = dl->chap.auth.cfg.fsmretry;
1014  auth_Init(&dl->chap.auth);
1015  dl->chap.auth.cfg.fsmretry = retry;
1016
1017  dl->physical = iov2modem(dl, iov, niov, maxiov, fd);
1018
1019  if (!dl->physical) {
1020    free(dl->name);
1021    free(dl);
1022    dl = NULL;
1023  } else {
1024    chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
1025
1026    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1027              dl->name, datalink_State(dl));
1028  }
1029
1030  return dl;
1031}
1032
1033int
1034datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1035             pid_t newpid)
1036{
1037  /* If `dl' is NULL, we're allocating before a Fromiov() */
1038  int link_fd;
1039
1040  if (dl) {
1041    timer_Stop(&dl->dial_timer);
1042    timer_Stop(&dl->pap.authtimer);
1043    timer_Stop(&dl->chap.auth.authtimer);
1044  }
1045
1046  if (*niov >= maxiov - 1) {
1047    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1048    if (dl) {
1049      free(dl->name);
1050      free(dl);
1051    }
1052    return -1;
1053  }
1054
1055  iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl);
1056  iov[(*niov)++].iov_len = sizeof *dl;
1057  iov[*niov].iov_base =
1058    dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME);
1059  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1060
1061  link_fd = modem2iov(dl ? dl->physical : NULL, iov, niov, maxiov, newpid);
1062
1063  if (link_fd == -1 && dl) {
1064    free(dl->name);
1065    free(dl);
1066  }
1067
1068  return link_fd;
1069}
1070
1071void
1072datalink_Rename(struct datalink *dl, const char *name)
1073{
1074  free(dl->name);
1075  dl->physical->link.name = dl->name = strdup(name);
1076}
1077
1078char *
1079datalink_NextName(struct datalink *dl)
1080{
1081  int f, n;
1082  char *name, *oname;
1083
1084  n = strlen(dl->name);
1085  name = (char *)malloc(n+3);
1086  for (f = n - 1; f >= 0; f--)
1087    if (!isdigit(dl->name[f]))
1088      break;
1089  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1090  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1091  oname = dl->name;
1092  dl->name = name;
1093  /* our physical link name isn't updated (it probably isn't created yet) */
1094  return oname;
1095}
1096
1097int
1098datalink_SetMode(struct datalink *dl, int mode)
1099{
1100  if (!physical_SetMode(dl->physical, mode))
1101    return 0;
1102  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1103    dl->script.run = 0;
1104  if (dl->physical->type == PHYS_DIRECT)
1105    dl->reconnect_tries = 0;
1106  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND) && dl->state <= DATALINK_READY)
1107    datalink_Up(dl, 1, 1);
1108  return 1;
1109}
1110