datalink.c revision 37012 
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 1.9 1998/06/15 19:05:15 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_DDIAL|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 &
210           (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|PHYS_DDIAL)) &&
211          !bundle_IsDead(dl->bundle))
212        /*
213         * Our first time in - DEDICATED & DDIAL never come down, and
214         * DIRECT & BACKGROUND get deleted when they enter DATALINK_CLOSED.
215         * Go to DATALINK_OPENING via datalink_Up() and fall through.
216         */
217        datalink_Up(dl, 1, 1);
218      else
219        break;
220      /* fall through */
221
222    case DATALINK_OPENING:
223      if (dl->dial_timer.state != TIMER_RUNNING) {
224        if (--dl->dial_tries < 0)
225          dl->dial_tries = 0;
226        if (modem_Open(dl->physical, dl->bundle) >= 0) {
227          if (dl->script.run) {
228            datalink_NewState(dl, DATALINK_DIAL);
229            chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial, 1,
230                      datalink_ChoosePhoneNumber(dl));
231            if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
232                dl->cfg.dial.max)
233              log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
234                        dl->name, dl->cfg.dial.max - dl->dial_tries,
235                        dl->cfg.dial.max);
236            return datalink_UpdateSet(d, r, w, e, n);
237          } else
238            datalink_LoginDone(dl);
239        } else {
240          if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
241              dl->cfg.dial.max)
242            log_Printf(LogCHAT, "Failed to open modem (attempt %u of %d)\n",
243                      dl->cfg.dial.max - dl->dial_tries, dl->cfg.dial.max);
244          else
245            log_Printf(LogCHAT, "Failed to open modem\n");
246
247          if (dl->bundle->CleaningUp ||
248              (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
249               dl->cfg.dial.max && dl->dial_tries == 0)) {
250            datalink_NewState(dl, DATALINK_CLOSED);
251            dl->reconnect_tries = 0;
252            dl->dial_tries = -1;
253            bundle_LinkClosed(dl->bundle, dl);
254          }
255          if (!dl->bundle->CleaningUp)
256            datalink_StartDialTimer(dl, dl->cfg.dial.timeout);
257        }
258      }
259      break;
260
261    case DATALINK_HANGUP:
262    case DATALINK_DIAL:
263    case DATALINK_LOGIN:
264      result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
265      switch (dl->chat.state) {
266        case CHAT_DONE:
267          /* script succeeded */
268          chat_Destroy(&dl->chat);
269          switch(dl->state) {
270            case DATALINK_HANGUP:
271              datalink_HangupDone(dl);
272              break;
273            case DATALINK_DIAL:
274              datalink_NewState(dl, DATALINK_LOGIN);
275              chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, 0, NULL);
276              return datalink_UpdateSet(d, r, w, e, n);
277            case DATALINK_LOGIN:
278              datalink_LoginDone(dl);
279              break;
280          }
281          break;
282        case CHAT_FAILED:
283          /* Going down - script failed */
284          log_Printf(LogWARN, "Chat script failed\n");
285          chat_Destroy(&dl->chat);
286          switch(dl->state) {
287            case DATALINK_HANGUP:
288              datalink_HangupDone(dl);
289              break;
290            case DATALINK_DIAL:
291            case DATALINK_LOGIN:
292              datalink_NewState(dl, DATALINK_HANGUP);
293              modem_Offline(dl->physical);
294              chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
295              return datalink_UpdateSet(d, r, w, e, n);
296          }
297          break;
298      }
299      break;
300
301    case DATALINK_READY:
302    case DATALINK_LCP:
303    case DATALINK_AUTH:
304    case DATALINK_OPEN:
305      result = descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
306      break;
307  }
308  return result;
309}
310
311int
312datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
313{
314  return physical_RemoveFromSet(dl->physical, r, w, e);
315}
316
317static int
318datalink_IsSet(struct descriptor *d, const fd_set *fdset)
319{
320  struct datalink *dl = descriptor2datalink(d);
321
322  switch (dl->state) {
323    case DATALINK_CLOSED:
324    case DATALINK_OPENING:
325      break;
326
327    case DATALINK_HANGUP:
328    case DATALINK_DIAL:
329    case DATALINK_LOGIN:
330      return descriptor_IsSet(&dl->chat.desc, fdset);
331
332    case DATALINK_READY:
333    case DATALINK_LCP:
334    case DATALINK_AUTH:
335    case DATALINK_OPEN:
336      return descriptor_IsSet(&dl->physical->desc, fdset);
337  }
338  return 0;
339}
340
341static void
342datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
343{
344  struct datalink *dl = descriptor2datalink(d);
345
346  switch (dl->state) {
347    case DATALINK_CLOSED:
348    case DATALINK_OPENING:
349      break;
350
351    case DATALINK_HANGUP:
352    case DATALINK_DIAL:
353    case DATALINK_LOGIN:
354      descriptor_Read(&dl->chat.desc, bundle, fdset);
355      break;
356
357    case DATALINK_READY:
358    case DATALINK_LCP:
359    case DATALINK_AUTH:
360    case DATALINK_OPEN:
361      descriptor_Read(&dl->physical->desc, bundle, fdset);
362      break;
363  }
364}
365
366static void
367datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
368{
369  struct datalink *dl = descriptor2datalink(d);
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      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      descriptor_Write(&dl->physical->desc, bundle, fdset);
387      break;
388  }
389}
390
391static void
392datalink_ComeDown(struct datalink *dl, int how)
393{
394  if (how != CLOSE_NORMAL) {
395    dl->dial_tries = -1;
396    dl->reconnect_tries = 0;
397    if (dl->state >= DATALINK_READY && how == CLOSE_LCP)
398      dl->stayonline = 1;
399  }
400
401  if (dl->state >= DATALINK_READY && dl->stayonline) {
402    dl->stayonline = 0;
403    datalink_NewState(dl, DATALINK_READY);
404  } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
405    modem_Offline(dl->physical);
406    if (dl->script.run && dl->state != DATALINK_OPENING) {
407      datalink_NewState(dl, DATALINK_HANGUP);
408      chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL);
409    } else
410      datalink_HangupDone(dl);
411  }
412}
413
414static void
415datalink_LayerStart(void *v, struct fsm *fp)
416{
417  /* The given FSM is about to start up ! */
418  struct datalink *dl = (struct datalink *)v;
419
420  if (fp->proto == PROTO_LCP)
421    (*dl->parent->LayerStart)(dl->parent->object, fp);
422}
423
424static void
425datalink_LayerUp(void *v, struct fsm *fp)
426{
427  /* The given fsm is now up */
428  struct datalink *dl = (struct datalink *)v;
429
430  if (fp->proto == PROTO_LCP) {
431    datalink_GotAuthname(dl, "", 0);
432    dl->physical->link.lcp.auth_ineed = dl->physical->link.lcp.want_auth;
433    dl->physical->link.lcp.auth_iwait = dl->physical->link.lcp.his_auth;
434    if (dl->physical->link.lcp.his_auth || dl->physical->link.lcp.want_auth) {
435      if (bundle_Phase(dl->bundle) == PHASE_ESTABLISH)
436        bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
437      log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
438                Auth2Nam(dl->physical->link.lcp.his_auth),
439                Auth2Nam(dl->physical->link.lcp.want_auth));
440      if (dl->physical->link.lcp.his_auth == PROTO_PAP)
441        auth_StartChallenge(&dl->pap, dl->physical, pap_SendChallenge);
442      if (dl->physical->link.lcp.want_auth == PROTO_CHAP)
443        auth_StartChallenge(&dl->chap.auth, dl->physical, chap_SendChallenge);
444    } else
445      datalink_AuthOk(dl);
446  }
447}
448
449void
450datalink_GotAuthname(struct datalink *dl, const char *name, int len)
451{
452  if (len >= sizeof dl->peer.authname)
453    len = sizeof dl->peer.authname - 1;
454  strncpy(dl->peer.authname, name, len);
455  dl->peer.authname[len] = '\0';
456}
457
458void
459datalink_AuthOk(struct datalink *dl)
460{
461  ccp_SetOpenMode(&dl->physical->link.ccp);
462
463  if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
464    /* we've authenticated in multilink mode ! */
465    switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
466      case MP_LINKSENT:
467        /* We've handed the link off to another ppp (well, we will soon) ! */
468        return;
469      case MP_UP:
470        /* First link in the bundle */
471        auth_Select(dl->bundle, dl->peer.authname, dl->physical);
472        /* fall through */
473      case MP_ADDED:
474        /* We're in multilink mode ! */
475        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;	/* override */
476        break;
477      case MP_FAILED:
478        datalink_AuthNotOk(dl);
479        return;
480    }
481  } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
482    log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
483    datalink_AuthNotOk(dl);
484    return;
485  } else {
486    dl->bundle->ncp.mp.peer = dl->peer;
487    ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link);
488    auth_Select(dl->bundle, dl->peer.authname, dl->physical);
489  }
490
491  fsm_Up(&dl->physical->link.ccp.fsm);
492  fsm_Open(&dl->physical->link.ccp.fsm);
493  datalink_NewState(dl, DATALINK_OPEN);
494  bundle_NewPhase(dl->bundle, PHASE_NETWORK);
495  (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
496}
497
498void
499datalink_AuthNotOk(struct datalink *dl)
500{
501  datalink_NewState(dl, DATALINK_LCP);
502  fsm_Close(&dl->physical->link.lcp.fsm);
503}
504
505static void
506datalink_LayerDown(void *v, struct fsm *fp)
507{
508  /* The given FSM has been told to come down */
509  struct datalink *dl = (struct datalink *)v;
510
511  if (fp->proto == PROTO_LCP) {
512    switch (dl->state) {
513      case DATALINK_OPEN:
514        peerid_Init(&dl->peer);
515        fsm_Down(&dl->physical->link.ccp.fsm);
516        fsm_Close(&dl->physical->link.ccp.fsm);
517        datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
518        (*dl->parent->LayerDown)(dl->parent->object, fp);
519        /* fall through */
520
521      case DATALINK_AUTH:
522        timer_Stop(&dl->pap.authtimer);
523        timer_Stop(&dl->chap.auth.authtimer);
524    }
525    datalink_NewState(dl, DATALINK_LCP);
526  }
527}
528
529static void
530datalink_LayerFinish(void *v, struct fsm *fp)
531{
532  /* The given fsm is now down */
533  struct datalink *dl = (struct datalink *)v;
534
535  if (fp->proto == PROTO_LCP) {
536    if (fp->state == ST_STOPPED)
537      fsm_Close(fp);			/* back to CLOSED */
538    fsm_Down(fp);			/* Bring us to INITIAL or STARTING */
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      fsm_Down(&dl->physical->link.ccp.fsm);
744      fsm_Close(&dl->physical->link.ccp.fsm);
745      /* fall through */
746
747    case DATALINK_AUTH:
748    case DATALINK_LCP:
749      fsm_Close(&dl->physical->link.lcp.fsm);
750      if (how != CLOSE_NORMAL) {
751        dl->dial_tries = -1;
752        dl->reconnect_tries = 0;
753        if (how == CLOSE_LCP)
754          dl->stayonline = 1;
755      }
756      break;
757
758    default:
759      datalink_ComeDown(dl, how);
760  }
761}
762
763void
764datalink_Down(struct datalink *dl, int how)
765{
766  /* Carrier is lost */
767  switch (dl->state) {
768    case DATALINK_OPEN:
769      peerid_Init(&dl->peer);
770      fsm_Down(&dl->physical->link.ccp.fsm);
771      fsm_Close(&dl->physical->link.ccp.fsm);
772      /* fall through */
773
774    case DATALINK_AUTH:
775    case DATALINK_LCP:
776      if (dl->physical->link.lcp.fsm.state == ST_STOPPED)
777        fsm_Close(&dl->physical->link.lcp.fsm);		/* back to CLOSED */
778      fsm_Down(&dl->physical->link.lcp.fsm);
779      if (how != CLOSE_NORMAL)
780        fsm_Close(&dl->physical->link.lcp.fsm);
781      else
782        fsm_Open(&dl->physical->link.ccp.fsm);
783      /* fall through */
784
785    default:
786      datalink_ComeDown(dl, how);
787  }
788}
789
790void
791datalink_StayDown(struct datalink *dl)
792{
793  dl->reconnect_tries = 0;
794}
795
796void
797datalink_DontHangup(struct datalink *dl)
798{
799  if (dl->state >= DATALINK_LCP)
800    dl->stayonline = 1;
801}
802
803int
804datalink_Show(struct cmdargs const *arg)
805{
806  prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
807  prompt_Printf(arg->prompt, " State:            %s\n",
808                datalink_State(arg->cx));
809  prompt_Printf(arg->prompt, " CHAP Encryption:  %s\n",
810                arg->cx->chap.using_MSChap ? "MSChap" : "MD5" );
811  prompt_Printf(arg->prompt, " Peer name:        ");
812  if (*arg->cx->peer.authname)
813    prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
814  else if (arg->cx->state == DATALINK_OPEN)
815    prompt_Printf(arg->prompt, "None requested\n");
816  else
817    prompt_Printf(arg->prompt, "N/A\n");
818  prompt_Printf(arg->prompt, " Discriminator:    %s\n",
819                mp_Enddisc(arg->cx->peer.enddisc.class,
820                           arg->cx->peer.enddisc.address,
821                           arg->cx->peer.enddisc.len));
822
823  prompt_Printf(arg->prompt, "\nDefaults:\n");
824  prompt_Printf(arg->prompt, " Phone List:       %s\n",
825                arg->cx->cfg.phone.list);
826  if (arg->cx->cfg.dial.max)
827    prompt_Printf(arg->prompt, " Dial tries:       %d, delay ",
828                  arg->cx->cfg.dial.max);
829  else
830    prompt_Printf(arg->prompt, " Dial tries:       infinite, delay ");
831  if (arg->cx->cfg.dial.next_timeout > 0)
832    prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
833  else
834    prompt_Printf(arg->prompt, "random/");
835  if (arg->cx->cfg.dial.timeout > 0)
836    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
837  else
838    prompt_Printf(arg->prompt, "random\n");
839  prompt_Printf(arg->prompt, " Reconnect tries:  %d, delay ",
840                arg->cx->cfg.reconnect.max);
841  if (arg->cx->cfg.reconnect.timeout > 0)
842    prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
843  else
844    prompt_Printf(arg->prompt, "random\n");
845  prompt_Printf(arg->prompt, " Dial Script:      %s\n",
846                arg->cx->cfg.script.dial);
847  prompt_Printf(arg->prompt, " Login Script:     %s\n",
848                arg->cx->cfg.script.login);
849  prompt_Printf(arg->prompt, " Hangup Script:    %s\n",
850                arg->cx->cfg.script.hangup);
851  return 0;
852}
853
854int
855datalink_SetReconnect(struct cmdargs const *arg)
856{
857  if (arg->argc == arg->argn+2) {
858    arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
859    arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
860    return 0;
861  }
862  return -1;
863}
864
865int
866datalink_SetRedial(struct cmdargs const *arg)
867{
868  int timeout;
869  int tries;
870  char *dot;
871
872  if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
873    if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
874	(arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
875      arg->cx->cfg.dial.timeout = -1;
876      randinit();
877    } else {
878      timeout = atoi(arg->argv[arg->argn]);
879
880      if (timeout >= 0)
881	arg->cx->cfg.dial.timeout = timeout;
882      else {
883	log_Printf(LogWARN, "Invalid redial timeout\n");
884	return -1;
885      }
886    }
887
888    dot = strchr(arg->argv[arg->argn], '.');
889    if (dot) {
890      if (strcasecmp(++dot, "random") == 0) {
891	arg->cx->cfg.dial.next_timeout = -1;
892	randinit();
893      } else {
894	timeout = atoi(dot);
895	if (timeout >= 0)
896	  arg->cx->cfg.dial.next_timeout = timeout;
897	else {
898	  log_Printf(LogWARN, "Invalid next redial timeout\n");
899	  return -1;
900	}
901      }
902    } else
903      /* Default next timeout */
904      arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
905
906    if (arg->argc == arg->argn+2) {
907      tries = atoi(arg->argv[arg->argn+1]);
908
909      if (tries >= 0) {
910	arg->cx->cfg.dial.max = tries;
911      } else {
912	log_Printf(LogWARN, "Invalid retry value\n");
913	return 1;
914      }
915    }
916    return 0;
917  }
918  return -1;
919}
920
921static const char *states[] = {
922  "closed",
923  "opening",
924  "hangup",
925  "dial",
926  "login",
927  "ready",
928  "lcp",
929  "auth",
930  "open"
931};
932
933const char *
934datalink_State(struct datalink *dl)
935{
936  if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
937    return "unknown";
938  return states[dl->state];
939}
940
941static void
942datalink_NewState(struct datalink *dl, int state)
943{
944  if (state != dl->state) {
945    if (state >= 0 && state < sizeof states / sizeof states[0]) {
946      log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
947                 states[state]);
948      dl->state = state;
949    } else
950      log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
951  }
952}
953
954struct datalink *
955iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
956             int fd)
957{
958  struct datalink *dl, *cdl;
959  u_int retry;
960  char *oname;
961
962  dl = (struct datalink *)iov[(*niov)++].iov_base;
963  dl->name = iov[*niov].iov_base;
964
965  if (dl->name[DATALINK_MAXNAME-1]) {
966    dl->name[DATALINK_MAXNAME-1] = '\0';
967    if (strlen(dl->name) == DATALINK_MAXNAME - 1)
968      log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
969  }
970
971  /* Make sure the name is unique ! */
972  oname = NULL;
973  do {
974    for (cdl = bundle->links; cdl; cdl = cdl->next)
975      if (!strcasecmp(dl->name, cdl->name)) {
976        if (oname)
977          free(datalink_NextName(dl));
978        else
979          oname = datalink_NextName(dl);
980        break;	/* Keep renaming 'till we have no conflicts */
981      }
982  } while (cdl);
983
984  if (oname) {
985    log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
986    free(oname);
987  } else {
988    dl->name = strdup(dl->name);
989    free(iov[*niov].iov_base);
990  }
991  (*niov)++;
992
993  dl->desc.type = DATALINK_DESCRIPTOR;
994  dl->desc.UpdateSet = datalink_UpdateSet;
995  dl->desc.IsSet = datalink_IsSet;
996  dl->desc.Read = datalink_Read;
997  dl->desc.Write = datalink_Write;
998
999  mp_linkInit(&dl->mp);
1000  *dl->phone.list = '\0';
1001  dl->phone.next = NULL;
1002  dl->phone.alt = NULL;
1003  dl->phone.chosen = "N/A";
1004
1005  dl->bundle = bundle;
1006  dl->next = NULL;
1007  memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
1008  dl->dial_tries = 0;
1009  dl->reconnect_tries = 0;
1010  dl->parent = &bundle->fsm;
1011  dl->fsmp.LayerStart = datalink_LayerStart;
1012  dl->fsmp.LayerUp = datalink_LayerUp;
1013  dl->fsmp.LayerDown = datalink_LayerDown;
1014  dl->fsmp.LayerFinish = datalink_LayerFinish;
1015  dl->fsmp.object = dl;
1016
1017  retry = dl->pap.cfg.fsmretry;
1018  auth_Init(&dl->pap);
1019  dl->pap.cfg.fsmretry = retry;
1020
1021  retry = dl->chap.auth.cfg.fsmretry;
1022  auth_Init(&dl->chap.auth);
1023  dl->chap.auth.cfg.fsmretry = retry;
1024
1025  dl->physical = iov2modem(dl, iov, niov, maxiov, fd);
1026
1027  if (!dl->physical) {
1028    free(dl->name);
1029    free(dl);
1030    dl = NULL;
1031  } else {
1032    chat_Init(&dl->chat, dl->physical, NULL, 1, NULL);
1033
1034    log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1035              dl->name, datalink_State(dl));
1036  }
1037
1038  return dl;
1039}
1040
1041int
1042datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1043             pid_t newpid)
1044{
1045  /* If `dl' is NULL, we're allocating before a Fromiov() */
1046  int link_fd;
1047
1048  if (dl) {
1049    timer_Stop(&dl->dial_timer);
1050    timer_Stop(&dl->pap.authtimer);
1051    timer_Stop(&dl->chap.auth.authtimer);
1052  }
1053
1054  if (*niov >= maxiov - 1) {
1055    log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1056    if (dl) {
1057      free(dl->name);
1058      free(dl);
1059    }
1060    return -1;
1061  }
1062
1063  iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl);
1064  iov[(*niov)++].iov_len = sizeof *dl;
1065  iov[*niov].iov_base =
1066    dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME);
1067  iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1068
1069  link_fd = modem2iov(dl ? dl->physical : NULL, iov, niov, maxiov, newpid);
1070
1071  if (link_fd == -1 && dl) {
1072    free(dl->name);
1073    free(dl);
1074  }
1075
1076  return link_fd;
1077}
1078
1079void
1080datalink_Rename(struct datalink *dl, const char *name)
1081{
1082  free(dl->name);
1083  dl->physical->link.name = dl->name = strdup(name);
1084}
1085
1086char *
1087datalink_NextName(struct datalink *dl)
1088{
1089  int f, n;
1090  char *name, *oname;
1091
1092  n = strlen(dl->name);
1093  name = (char *)malloc(n+3);
1094  for (f = n - 1; f >= 0; f--)
1095    if (!isdigit(dl->name[f]))
1096      break;
1097  n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1098  sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1099  oname = dl->name;
1100  dl->name = name;
1101  /* our physical link name isn't updated (it probably isn't created yet) */
1102  return oname;
1103}
1104
1105int
1106datalink_SetMode(struct datalink *dl, int mode)
1107{
1108  if (!physical_SetMode(dl->physical, mode))
1109    return 0;
1110  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1111    dl->script.run = 0;
1112  if (dl->physical->type == PHYS_DIRECT)
1113    dl->reconnect_tries = 0;
1114  if (mode & (PHYS_DDIAL|PHYS_BACKGROUND) && dl->state <= DATALINK_READY)
1115    datalink_Up(dl, 1, 1);
1116  return 1;
1117}
1118