datalink.c revision 36285 
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 1.1.2.63 1998/05/16 23:47:24 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#include <unistd.h>
42
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#include "bundle.h"
63#include "chat.h"
64#include "auth.h"
65#include "modem.h"
66#include "prompt.h"
67#include "lcpproto.h"
68#include "pap.h"
69#include "chap.h"
70#include "command.h"
71#include "datalink.h"
72
73static void datalink_LoginDone(struct datalink *);
74static void datalink_NewState(struct datalink *, int);
75
76static void
77datalink_OpenTimeout(void *v)
78{
79  struct datalink *dl = (struct datalink *)v;
80
81  timer_Stop(&dl->dial_timer);
82  if (dl->state == DATALINK_OPENING)
83    log_Printf(LogPHASE, "%s: Redial timer expired.\n", dl->name);
84}
85
86static void
87datalink_StartDialTimer(struct datalink *dl, int Timeout)
88{
89  timer_Stop(&dl->dial_timer);
90
91  if (Timeout) {
92    if (Timeout > 0)
93      dl->dial_timer.load = Timeout * SECTICKS;
94    else
95      dl->dial_timer.load = (random() % DIAL_TIMEOUT) * SECTICKS;
96    dl->dial_timer.func = datalink_OpenTimeout;
97    dl->dial_timer.name = "dial";
98    dl->dial_timer.arg = dl;
99    timer_Start(&dl->dial_timer);
100    if (dl->state == DATALINK_OPENING)
101      log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
102                dl->name, Timeout);
103  }
104}
105
106static void
107datalink_HangupDone(struct datalink *dl)
108{
109  if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
110      physical_GetFD(dl->physical) != -1) {
111    /* Don't close our modem if the link is dedicated */
112    datalink_LoginDone(dl);
113    return;
114  }
115
116  modem_Close(dl->physical);
117  dl->phone.chosen = "N/A";
118
119  if (dl->bundle->CleaningUp ||
120      (dl->physical->type == PHYS_DIRECT) ||
121      ((!dl->dial_tries || (dl->dial_tries < 0 && !dl->reconnect_tries)) &&
122       !(dl->physical->type & (PHYS_PERM|PHYS_DEDICATED)))) {
123    datalink_NewState(dl, DATALINK_CLOSED);
124    dl->dial_tries = -1;
125    dl->reconnect_tries = 0;
126    bundle_LinkClosed(dl->bundle, dl);
127    if (!dl->bundle->CleaningUp)
128      datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
129  } else {
130    datalink_NewState(dl, DATALINK_OPENING);
131    if (dl->dial_tries < 0) {
132      datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
133      dl->dial_tries = dl->cfg.dial.max;
134      dl->reconnect_tries--;
135    } else {
136      if (dl->phone.next == NULL)
137        datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
138      else
139        datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
140    }
141  }
142}
143
144static const char *
145datalink_ChoosePhoneNumber(struct datalink *dl)
146{
147  char *phone;
148
149  if (dl->phone.alt == NULL) {
150    if (dl->phone.next == NULL) {
151      strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
152      dl->phone.list[sizeof dl->phone.list - 1] = '\0';
153      dl->phone.next = dl->phone.list;
154    }
155    dl->phone.alt = strsep(&dl->phone.next, ":");
156  }
157  phone = strsep(&dl->phone.alt, "|");
158  dl->phone.chosen = *phone ? phone : "[NONE]";
159  if (*phone)
160    log_Printf(LogPHASE, "Phone: %s\n", phone);
161  return phone;
162}
163
164static void
165datalink_LoginDone(struct datalink *dl)
166{
167  if (!dl->script.packetmode) {
168    dl->dial_tries = -1;
169    datalink_NewState(dl, DATALINK_READY);
170  } else if (modem_Raw(dl->physical, dl->bundle) < 0) {
171    dl->dial_tries = 0;
172    log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
173    if (dl->script.run) {
174      datalink_NewState(dl, DATALINK_HANGUP);
175      modem_Offline(dl->physical);
176      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
177    } else {
178      if (dl->physical->type == PHYS_DEDICATED)
179        /* force a redial timeout */
180        modem_Close(dl->physical);
181      datalink_HangupDone(dl);
182    }
183  } else {
184    dl->dial_tries = -1;
185
186    hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
187    async_Init(&dl->physical->async);
188
189    lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
190              0 : dl->physical->link.lcp.cfg.openmode);
191    ccp_Setup(&dl->physical->link.ccp);
192
193    datalink_NewState(dl, DATALINK_LCP);
194    fsm_Up(&dl->physical->link.lcp.fsm);
195    fsm_Open(&dl->physical->link.lcp.fsm);
196  }
197}
198
199static int
200datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
201                   int *n)
202{
203  struct datalink *dl = descriptor2datalink(d);
204  int result;
205
206  result = 0;
207  switch (dl->state) {
208    case DATALINK_CLOSED:
209      if ((dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED|PHYS_1OFF)) &&
210          !bundle_IsDead(dl->bundle))
211        /*
212         * Our first time in - DEDICATED never comes down, and STDIN & 1OFF
213         * get deleted when they enter DATALINK_CLOSED.  Go to
214         * 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_PERM|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_PERM|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_PERM|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 void
366datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
367{
368  struct datalink *dl = descriptor2datalink(d);
369
370  switch (dl->state) {
371    case DATALINK_CLOSED:
372    case DATALINK_OPENING:
373      break;
374
375    case DATALINK_HANGUP:
376    case DATALINK_DIAL:
377    case DATALINK_LOGIN:
378      descriptor_Write(&dl->chat.desc, bundle, fdset);
379      break;
380
381    case DATALINK_READY:
382    case DATALINK_LCP:
383    case DATALINK_AUTH:
384    case DATALINK_OPEN:
385      descriptor_Write(&dl->physical->desc, bundle, fdset);
386      break;
387  }
388}
389
390static void
391datalink_ComeDown(struct datalink *dl, int stay)
392{
393  if (stay) {
394    dl->dial_tries = -1;
395    dl->reconnect_tries = 0;
396  }
397
398  if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
399    modem_Offline(dl->physical);
400    if (dl->script.run && dl->state != DATALINK_OPENING) {
401      datalink_NewState(dl, DATALINK_HANGUP);
402      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
403    } else
404      datalink_HangupDone(dl);
405  }
406}
407
408static void
409datalink_LayerStart(void *v, struct fsm *fp)
410{
411  /* The given FSM is about to start up ! */
412  struct datalink *dl = (struct datalink *)v;
413
414  if (fp->proto == PROTO_LCP)
415    (*dl->parent->LayerStart)(dl->parent->object, fp);
416}
417
418static void
419datalink_LayerUp(void *v, struct fsm *fp)
420{
421  /* The given fsm is now up */
422  struct datalink *dl = (struct datalink *)v;
423
424  if (fp->proto == PROTO_LCP) {
425    datalink_GotAuthname(dl, "", 0);
426    dl->physical->link.lcp.auth_ineed = dl->physical->link.lcp.want_auth;
427    dl->physical->link.lcp.auth_iwait = dl->physical->link.lcp.his_auth;
428    if (dl->physical->link.lcp.his_auth || dl->physical->link.lcp.want_auth) {
429      if (bundle_Phase(dl->bundle) == PHASE_ESTABLISH)
430        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
431      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
432                Auth2Nam(dl->physical->link.lcp.his_auth),
433                Auth2Nam(dl->physical->link.lcp.want_auth));
434      if (dl->physical->link.lcp.his_auth == PROTO_PAP)
435        auth_StartChallenge(&dl->pap, dl->physical, pap_SendChallenge);
436      if (dl->physical->link.lcp.want_auth == PROTO_CHAP)
437        auth_StartChallenge(&dl->chap.auth, dl->physical, chap_SendChallenge);
438    } else
439      datalink_AuthOk(dl);
440  }
441}
442
443void
444datalink_GotAuthname(struct datalink *dl, const char *name, int len)
445{
446  if (len >= sizeof dl->peer.authname)
447    len = sizeof dl->peer.authname - 1;
448  strncpy(dl->peer.authname, name, len);
449  dl->peer.authname[len] = '\0';
450}
451
452void
453datalink_AuthOk(struct datalink *dl)
454{
455  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
456    /* we've authenticated in multilink mode ! */
457    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
458      case MP_LINKSENT:
459        /* We've handed the link off to another ppp (well, we will soon) ! */
460        return;
461      case MP_UP:
462        /* First link in the bundle */
463        auth_Select(dl->bundle, dl->peer.authname, dl->physical);
464        /* fall through */
465      case MP_ADDED:
466        /* We're in multilink mode ! */
467        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;
468        break;
469      case MP_FAILED:
470        datalink_AuthNotOk(dl);
471        return;
472    }
473  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
474    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
475    datalink_AuthNotOk(dl);
476    return;
477  } else {
478    dl->bundle->ncp.mp.peer = dl->peer;
479    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
480    auth_Select(dl->bundle, dl->peer.authname, dl->physical);
481  }
482
483  fsm_Up(&dl->physical->link.ccp.fsm);
484  fsm_Open(&dl->physical->link.ccp.fsm);
485  datalink_NewState(dl, DATALINK_OPEN);
486  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
487  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
488}
489
490void
491datalink_AuthNotOk(struct datalink *dl)
492{
493  datalink_NewState(dl, DATALINK_LCP);
494  fsm_Close(&dl->physical->link.lcp.fsm);
495}
496
497static void
498datalink_LayerDown(void *v, struct fsm *fp)
499{
500  /* The given FSM has been told to come down */
501  struct datalink *dl = (struct datalink *)v;
502
503  if (fp->proto == PROTO_LCP) {
504    switch (dl->state) {
505      case DATALINK_OPEN:
506        peerid_Init(&dl->peer);
507        fsm_Down(&dl->physical->link.ccp.fsm);
508        fsm_Close(&dl->physical->link.ccp.fsm);
509        (*dl->parent->LayerDown)(dl->parent->object, fp);
510        /* fall through */
511
512      case DATALINK_AUTH:
513        timer_Stop(&dl->pap.authtimer);
514        timer_Stop(&dl->chap.auth.authtimer);
515    }
516    datalink_NewState(dl, DATALINK_LCP);
517  }
518}
519
520static void
521datalink_LayerFinish(void *v, struct fsm *fp)
522{
523  /* The given fsm is now down */
524  struct datalink *dl = (struct datalink *)v;
525
526  if (fp->proto == PROTO_LCP) {
527    fsm_Down(fp);	/* Bring us to INITIAL or STARTING */
528    (*dl->parent->LayerFinish)(dl->parent->object, fp);
529    datalink_ComeDown(dl, 0);
530  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
531    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
532}
533
534struct datalink *
535datalink_Create(const char *name, struct bundle *bundle, int type)
536{
537  struct datalink *dl;
538
539  dl = (struct datalink *)malloc(sizeof(struct datalink));
540  if (dl == NULL)
541    return dl;
542
543  dl->desc.type = DATALINK_DESCRIPTOR;
544  dl->desc.next = NULL;
545  dl->desc.UpdateSet = datalink_UpdateSet;
546  dl->desc.IsSet = datalink_IsSet;
547  dl->desc.Read = datalink_Read;
548  dl->desc.Write = datalink_Write;
549
550  dl->state = DATALINK_CLOSED;
551
552  *dl->cfg.script.dial = '\0';
553  *dl->cfg.script.login = '\0';
554  *dl->cfg.script.hangup = '\0';
555  *dl->cfg.phone.list = '\0';
556  *dl->phone.list = '\0';
557  dl->phone.next = NULL;
558  dl->phone.alt = NULL;
559  dl->phone.chosen = "N/A";
560  dl->script.run = 1;
561  dl->script.packetmode = 1;
562  mp_linkInit(&dl->mp);
563
564  dl->bundle = bundle;
565  dl->next = NULL;
566
567  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
568
569  dl->dial_tries = 0;
570  dl->cfg.dial.max = 1;
571  dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
572  dl->cfg.dial.timeout = DIAL_TIMEOUT;
573
574  dl->reconnect_tries = 0;
575  dl->cfg.reconnect.max = 0;
576  dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
577
578  dl->name = strdup(name);
579  peerid_Init(&dl->peer);
580  dl->parent = &bundle->fsm;
581  dl->fsmp.LayerStart = datalink_LayerStart;
582  dl->fsmp.LayerUp = datalink_LayerUp;
583  dl->fsmp.LayerDown = datalink_LayerDown;
584  dl->fsmp.LayerFinish = datalink_LayerFinish;
585  dl->fsmp.object = dl;
586
587  auth_Init(&dl->pap);
588  auth_Init(&dl->chap.auth);
589
590  if ((dl->physical = modem_Create(dl, type)) == NULL) {
591    free(dl->name);
592    free(dl);
593    return NULL;
594  }
595  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
596
597  log_Printf(LogPHASE, "%s: Created in %s state\n",
598             dl->name, datalink_State(dl));
599
600  return dl;
601}
602
603struct datalink *
604datalink_Clone(struct datalink *odl, const char *name)
605{
606  struct datalink *dl;
607
608  dl = (struct datalink *)malloc(sizeof(struct datalink));
609  if (dl == NULL)
610    return dl;
611
612  dl->desc.type = DATALINK_DESCRIPTOR;
613  dl->desc.next = NULL;
614  dl->desc.UpdateSet = datalink_UpdateSet;
615  dl->desc.IsSet = datalink_IsSet;
616  dl->desc.Read = datalink_Read;
617  dl->desc.Write = datalink_Write;
618
619  dl->state = DATALINK_CLOSED;
620
621  memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
622  mp_linkInit(&dl->mp);
623  *dl->phone.list = '\0';
624  dl->phone.next = NULL;
625  dl->phone.alt = NULL;
626  dl->phone.chosen = "N/A";
627  dl->bundle = odl->bundle;
628  dl->next = NULL;
629  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
630  dl->dial_tries = 0;
631  dl->reconnect_tries = 0;
632  dl->name = strdup(name);
633  peerid_Init(&dl->peer);
634  dl->parent = odl->parent;
635  memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
636  dl->fsmp.object = dl;
637  auth_Init(&dl->pap);
638  dl->pap.cfg.fsmretry = odl->pap.cfg.fsmretry;
639
640  auth_Init(&dl->chap.auth);
641  dl->chap.auth.cfg.fsmretry = odl->chap.auth.cfg.fsmretry;
642
643  if ((dl->physical = modem_Create(dl, PHYS_MANUAL)) == NULL) {
644    free(dl->name);
645    free(dl);
646    return NULL;
647  }
648  memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
649  memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
650         sizeof dl->physical->link.lcp.cfg);
651  memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
652         sizeof dl->physical->link.ccp.cfg);
653  memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
654         sizeof dl->physical->async.cfg);
655
656  chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
657
658  log_Printf(LogPHASE, "%s: Cloned in %s state\n",
659             dl->name, datalink_State(dl));
660
661  return dl;
662}
663
664struct datalink *
665datalink_Destroy(struct datalink *dl)
666{
667  struct datalink *result;
668
669  if (dl->state != DATALINK_CLOSED) {
670    log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
671              datalink_State(dl));
672    switch (dl->state) {
673      case DATALINK_HANGUP:
674      case DATALINK_DIAL:
675      case DATALINK_LOGIN:
676        chat_Destroy(&dl->chat);	/* Gotta blat the timers ! */
677        break;
678    }
679  }
680
681  result = dl->next;
682  modem_Destroy(dl->physical);
683  free(dl->name);
684  free(dl);
685
686  return result;
687}
688
689void
690datalink_Up(struct datalink *dl, int runscripts, int packetmode)
691{
692  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
693    /* Ignore scripts */
694    runscripts = 0;
695
696  switch (dl->state) {
697    case DATALINK_CLOSED:
698      if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
699          bundle_Phase(dl->bundle) == PHASE_TERMINATE)
700        bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
701      datalink_NewState(dl, DATALINK_OPENING);
702      dl->reconnect_tries =
703        dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
704      dl->dial_tries = dl->cfg.dial.max;
705      dl->script.run = runscripts;
706      dl->script.packetmode = packetmode;
707      break;
708
709    case DATALINK_OPENING:
710      if (!dl->script.run && runscripts)
711        dl->script.run = 1;
712      /* fall through */
713
714    case DATALINK_DIAL:
715    case DATALINK_LOGIN:
716    case DATALINK_READY:
717      if (!dl->script.packetmode && packetmode) {
718        dl->script.packetmode = 1;
719        if (dl->state == DATALINK_READY)
720          datalink_LoginDone(dl);
721      }
722      break;
723  }
724}
725
726void
727datalink_Close(struct datalink *dl, int stay)
728{
729  /* Please close */
730  switch (dl->state) {
731    case DATALINK_OPEN:
732      peerid_Init(&dl->peer);
733      fsm_Down(&dl->physical->link.ccp.fsm);
734      fsm_Close(&dl->physical->link.ccp.fsm);
735      /* fall through */
736
737    case DATALINK_AUTH:
738    case DATALINK_LCP:
739      fsm_Close(&dl->physical->link.lcp.fsm);
740      if (stay) {
741        dl->dial_tries = -1;
742        dl->reconnect_tries = 0;
743      }
744      break;
745
746    default:
747      datalink_ComeDown(dl, stay);
748  }
749}
750
751void
752datalink_Down(struct datalink *dl, int stay)
753{
754  /* Carrier is lost */
755  switch (dl->state) {
756    case DATALINK_OPEN:
757      peerid_Init(&dl->peer);
758      fsm_Down(&dl->physical->link.ccp.fsm);
759      fsm_Close(&dl->physical->link.ccp.fsm);
760      /* fall through */
761
762    case DATALINK_AUTH:
763    case DATALINK_LCP:
764      fsm_Down(&dl->physical->link.lcp.fsm);
765      if (stay)
766        fsm_Close(&dl->physical->link.lcp.fsm);
767      else
768        fsm_Open(&dl->physical->link.ccp.fsm);
769      /* fall through */
770
771    default:
772      datalink_ComeDown(dl, stay);
773  }
774}
775
776void
777datalink_StayDown(struct datalink *dl)
778{
779  dl->reconnect_tries = 0;
780}
781
782int
783datalink_Show(struct cmdargs const *arg)
784{
785  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
786  prompt_Printf(arg->prompt, " State:            %s\n",
787                datalink_State(arg->cx));
788  prompt_Printf(arg->prompt, " CHAP Encryption:  %s\n",
789                arg->cx->chap.using_MSChap ? "MSChap" : "MD5" );
790  prompt_Printf(arg->prompt, " Peer name:        ");
791  if (*arg->cx->peer.authname)
792    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
793  else if (arg->cx->state == DATALINK_OPEN)
794    prompt_Printf(arg->prompt, "None requested\n");
795  else
796    prompt_Printf(arg->prompt, "N/A\n");
797  prompt_Printf(arg->prompt, " Discriminator:    %s\n",
798                mp_Enddisc(arg->cx->peer.enddisc.class,
799                           arg->cx->peer.enddisc.address,
800                           arg->cx->peer.enddisc.len));
801
802  prompt_Printf(arg->prompt, "\nDefaults:\n");
803  prompt_Printf(arg->prompt, " Phone List:       %s\n",
804                arg->cx->cfg.phone.list);
805  if (arg->cx->cfg.dial.max)
806    prompt_Printf(arg->prompt, " Dial tries:       %d, delay ",
807                  arg->cx->cfg.dial.max);
808  else
809    prompt_Printf(arg->prompt, " Dial tries:       infinite, delay ");
810  if (arg->cx->cfg.dial.next_timeout > 0)
811    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
812  else
813    prompt_Printf(arg->prompt, "random/");
814  if (arg->cx->cfg.dial.timeout > 0)
815    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
816  else
817    prompt_Printf(arg->prompt, "random\n");
818  prompt_Printf(arg->prompt, " Reconnect tries:  %d, delay ",
819                arg->cx->cfg.reconnect.max);
820  if (arg->cx->cfg.reconnect.timeout > 0)
821    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
822  else
823    prompt_Printf(arg->prompt, "random\n");
824  prompt_Printf(arg->prompt, " Dial Script:      %s\n",
825                arg->cx->cfg.script.dial);
826  prompt_Printf(arg->prompt, " Login Script:     %s\n",
827                arg->cx->cfg.script.login);
828  prompt_Printf(arg->prompt, " Hangup Script:    %s\n",
829                arg->cx->cfg.script.hangup);
830  return 0;
831}
832
833int
834datalink_SetReconnect(struct cmdargs const *arg)
835{
836  if (arg->argc == arg->argn+2) {
837    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
838    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
839    return 0;
840  }
841  return -1;
842}
843
844int
845datalink_SetRedial(struct cmdargs const *arg)
846{
847  int timeout;
848  int tries;
849  char *dot;
850
851  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
852    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
853	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
854      arg->cx->cfg.dial.timeout = -1;
855      randinit();
856    } else {
857      timeout = atoi(arg->argv[arg->argn]);
858
859      if (timeout >= 0)
860	arg->cx->cfg.dial.timeout = timeout;
861      else {
862	log_Printf(LogWARN, "Invalid redial timeout\n");
863	return -1;
864      }
865    }
866
867    dot = strchr(arg->argv[arg->argn], '.');
868    if (dot) {
869      if (strcasecmp(++dot, "random") == 0) {
870	arg->cx->cfg.dial.next_timeout = -1;
871	randinit();
872      } else {
873	timeout = atoi(dot);
874	if (timeout >= 0)
875	  arg->cx->cfg.dial.next_timeout = timeout;
876	else {
877	  log_Printf(LogWARN, "Invalid next redial timeout\n");
878	  return -1;
879	}
880      }
881    } else
882      /* Default next timeout */
883      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
884
885    if (arg->argc == arg->argn+2) {
886      tries = atoi(arg->argv[arg->argn+1]);
887
888      if (tries >= 0) {
889	arg->cx->cfg.dial.max = tries;
890      } else {
891	log_Printf(LogWARN, "Invalid retry value\n");
892	return 1;
893      }
894    }
895    return 0;
896  }
897  return -1;
898}
899
900static const char *states[] = {
901  "closed",
902  "opening",
903  "hangup",
904  "dial",
905  "login",
906  "ready",
907  "lcp",
908  "auth",
909  "open"
910};
911
912const char *
913datalink_State(struct datalink *dl)
914{
915  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
916    return "unknown";
917  return states[dl->state];
918}
919
920static void
921datalink_NewState(struct datalink *dl, int state)
922{
923  if (state != dl->state) {
924    if (state >= 0 && state < sizeof states / sizeof states[0]) {
925      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
926                 states[state]);
927      dl->state = state;
928    } else
929      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
930  }
931}
932
933struct datalink *
934iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
935             int fd)
936{
937  struct datalink *dl, *cdl;
938  u_int retry;
939  char *oname;
940
941  dl = (struct datalink *)iov[(*niov)++].iov_base;
942  dl->name = iov[*niov].iov_base;
943
944  if (dl->name[DATALINK_MAXNAME-1]) {
945    dl->name[DATALINK_MAXNAME-1] = '\0';
946    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
947      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
948  }
949
950  /* Make sure the name is unique ! */
951  oname = NULL;
952  do {
953    for (cdl = bundle->links; cdl; cdl = cdl->next)
954      if (!strcasecmp(dl->name, cdl->name)) {
955        if (oname)
956          free(datalink_NextName(dl));
957        else
958          oname = datalink_NextName(dl);
959        break;	/* Keep renaming 'till we have no conflicts */
960      }
961  } while (cdl);
962
963  if (oname) {
964    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
965    free(oname);
966  } else {
967    dl->name = strdup(dl->name);
968    dl->physical->link.name = dl->name;
969    free(iov[*niov].iov_base);
970  }
971  (*niov)++;
972
973  dl->desc.type = DATALINK_DESCRIPTOR;
974  dl->desc.next = NULL;
975  dl->desc.UpdateSet = datalink_UpdateSet;
976  dl->desc.IsSet = datalink_IsSet;
977  dl->desc.Read = datalink_Read;
978  dl->desc.Write = datalink_Write;
979
980  mp_linkInit(&dl->mp);
981  *dl->phone.list = '\0';
982  dl->phone.next = NULL;
983  dl->phone.alt = NULL;
984  dl->phone.chosen = "N/A";
985
986  dl->bundle = bundle;
987  dl->next = NULL;
988  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
989  dl->dial_tries = 0;
990  dl->reconnect_tries = 0;
991  dl->parent = &bundle->fsm;
992  dl->fsmp.LayerStart = datalink_LayerStart;
993  dl->fsmp.LayerUp = datalink_LayerUp;
994  dl->fsmp.LayerDown = datalink_LayerDown;
995  dl->fsmp.LayerFinish = datalink_LayerFinish;
996  dl->fsmp.object = dl;
997
998  retry = dl->pap.cfg.fsmretry;
999  auth_Init(&dl->pap);
1000  dl->pap.cfg.fsmretry = retry;
1001
1002  retry = dl->chap.auth.cfg.fsmretry;
1003  auth_Init(&dl->chap.auth);
1004  dl->chap.auth.cfg.fsmretry = retry;
1005
1006  dl->physical = iov2modem(dl, iov, niov, maxiov, fd);
1007
1008  if (!dl->physical) {
1009    free(dl->name);
1010    free(dl);
1011    dl = NULL;
1012  } else {
1013    chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
1014
1015    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1016              dl->name, datalink_State(dl));
1017  }
1018
1019  return dl;
1020}
1021
1022int
1023datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov)
1024{
1025  /* If `dl' is NULL, we're allocating before a Fromiov() */
1026  int link_fd;
1027
1028  if (dl) {
1029    timer_Stop(&dl->dial_timer);
1030    timer_Stop(&dl->pap.authtimer);
1031    timer_Stop(&dl->chap.auth.authtimer);
1032  }
1033
1034  if (*niov >= maxiov - 1) {
1035    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1036    if (dl) {
1037      free(dl->name);
1038      free(dl);
1039    }
1040    return -1;
1041  }
1042
1043  iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl);
1044  iov[(*niov)++].iov_len = sizeof *dl;
1045  iov[*niov].iov_base =
1046    dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME);
1047  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1048
1049  link_fd = modem2iov(dl ? dl->physical : NULL, iov, niov, maxiov);
1050
1051  if (link_fd == -1 && dl) {
1052    free(dl->name);
1053    free(dl);
1054  }
1055
1056  return link_fd;
1057}
1058
1059void
1060datalink_Rename(struct datalink *dl, const char *name)
1061{
1062  free(dl->name);
1063  dl->physical->link.name = dl->name = strdup(name);
1064}
1065
1066char *
1067datalink_NextName(struct datalink *dl)
1068{
1069  int f, n;
1070  char *name, *oname;
1071
1072  n = strlen(dl->name);
1073  name = (char *)malloc(n+3);
1074  for (f = n - 1; f >= 0; f--)
1075    if (!isdigit(dl->name[f]))
1076      break;
1077  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1078  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1079  oname = dl->name;
1080  dl->physical->link.name = dl->name = name;
1081  return oname;
1082}
1083
1084int
1085datalink_SetMode(struct datalink *dl, int mode)
1086{
1087  if (!physical_SetMode(dl->physical, mode))
1088    return 0;
1089  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1090    dl->script.run = 0;
1091  if (dl->physical->type == PHYS_DIRECT)
1092    dl->reconnect_tries = 0;
1093  if (mode & (PHYS_PERM|PHYS_1OFF) && dl->state <= DATALINK_READY)
1094    datalink_Up(dl, 1, 1);
1095  return 1;
1096}
1097