usr.sbin/ppp/datalink.c

   1 /*-
   2  * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/usr.sbin/ppp/datalink.c,v 1.57.2.11 2002/09/01 02:12:26 brian Exp $
  27  * $DragonFly: src/usr.sbin/ppp/datalink.c,v 1.2 2003/06/17 04:30:00 dillon Exp $
  28  */
  29
  30 #include <sys/param.h>
  31 #include <netinet/in.h>
  32 #include <netinet/in_systm.h>
  33 #include <netinet/ip.h>
  34 #include <sys/socket.h>
  35 #include <sys/un.h>
  36
  37 #include <ctype.h>
  38 #include <stdarg.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <sys/uio.h>
  43 #include <termios.h>
  44
  45 #include "layer.h"
  46 #include "mbuf.h"
  47 #include "log.h"
  48 #include "defs.h"
  49 #include "timer.h"
  50 #include "fsm.h"
  51 #include "descriptor.h"
  52 #include "lqr.h"
  53 #include "hdlc.h"
  54 #include "lcp.h"
  55 #include "async.h"
  56 #include "throughput.h"
  57 #include "ccp.h"
  58 #include "link.h"
  59 #include "physical.h"
  60 #include "iplist.h"
  61 #include "slcompress.h"
  62 #include "ncpaddr.h"
  63 #include "ipcp.h"
  64 #include "filter.h"
  65 #include "mp.h"
  66 #ifndef NORADIUS
  67 #include "radius.h"
  68 #endif
  69 #include "ipv6cp.h"
  70 #include "ncp.h"
  71 #include "bundle.h"
  72 #include "chat.h"
  73 #include "auth.h"
  74 #include "prompt.h"
  75 #include "proto.h"
  76 #include "pap.h"
  77 #include "chap.h"
  78 #include "command.h"
  79 #include "cbcp.h"
  80 #include "datalink.h"
  81
  82 static void datalink_LoginDone(struct datalink *);
  83 static void datalink_NewState(struct datalink *, int);
  84
  85 static void
  86 datalink_OpenTimeout(void *v)
  87 {
  88   struct datalink *dl = (struct datalink *)v;
  89
  90   timer_Stop(&dl->dial.timer);
  91   if (dl->state == DATALINK_OPENING)
  92     log_Printf(LogCHAT, "%s: Redial timer expired.\n", dl->name);
  93 }
  94
  95 static int
  96 datalink_StartDialTimer(struct datalink *dl, int Timeout)
  97 {
  98   int result = Timeout;
  99
 100   timer_Stop(&dl->dial.timer);
 101   if (Timeout < 0)
 102     result = (random() % DIAL_TIMEOUT) + 1;
 103   dl->dial.timer.load = result ? result * SECTICKS : 1;
 104   dl->dial.timer.func = datalink_OpenTimeout;
 105   dl->dial.timer.name = "dial";
 106   dl->dial.timer.arg = dl;
 107   timer_Start(&dl->dial.timer);
 108   if (dl->state == DATALINK_OPENING)
 109     log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
 110                dl->name, result);
 111   return result;
 112 }
 113
 114 static void
 115 datalink_HangupDone(struct datalink *dl)
 116 {
 117   if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp &&
 118       dl->physical->fd != -1) {
 119     /* Don't close our device if the link is dedicated */
 120     datalink_LoginDone(dl);
 121     return;
 122   }
 123
 124   chat_Finish(&dl->chat);
 125   physical_Close(dl->physical);
 126   dl->phone.chosen = "N/A";
 127
 128   if (dl->cbcp.required) {
 129     log_Printf(LogPHASE, "Call peer back on %s\n", dl->cbcp.fsm.phone);
 130     dl->cfg.callback.opmask = 0;
 131     strncpy(dl->cfg.phone.list, dl->cbcp.fsm.phone,
 132             sizeof dl->cfg.phone.list - 1);
 133     dl->cfg.phone.list[sizeof dl->cfg.phone.list - 1] = '\0';
 134     dl->phone.alt = dl->phone.next = NULL;
 135     dl->reconnect_tries = dl->cfg.reconnect.max;
 136     dl->dial.tries = dl->cfg.dial.max;
 137     dl->dial.incs = 0;
 138     dl->script.run = 1;
 139     dl->script.packetmode = 1;
 140     if (!physical_SetMode(dl->physical, PHYS_BACKGROUND))
 141       log_Printf(LogERROR, "Oops - can't change mode to BACKGROUND (gulp) !\n");
 142     bundle_LinksRemoved(dl->bundle);
 143     /* if dial.timeout is < 0 (random), we don't override fsm.delay */
 144     if (dl->cbcp.fsm.delay < dl->cfg.dial.timeout)
 145       dl->cbcp.fsm.delay = dl->cfg.dial.timeout;
 146     datalink_StartDialTimer(dl, dl->cbcp.fsm.delay);
 147     cbcp_Down(&dl->cbcp);
 148     datalink_NewState(dl, DATALINK_OPENING);
 149     if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
 150         bundle_Phase(dl->bundle) == PHASE_TERMINATE)
 151       bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
 152   } else if (dl->bundle->CleaningUp ||
 153       (dl->physical->type == PHYS_DIRECT) ||
 154       ((!dl->dial.tries || (dl->dial.tries < 0 && !dl->reconnect_tries)) &&
 155        !(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)))) {
 156     datalink_NewState(dl, DATALINK_CLOSED);
 157     dl->dial.tries = -1;
 158     dl->dial.incs = 0;
 159     dl->reconnect_tries = 0;
 160     bundle_LinkClosed(dl->bundle, dl);
 161     if (!dl->bundle->CleaningUp &&
 162         !(dl->physical->type & (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)))
 163       datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
 164   } else {
 165     datalink_NewState(dl, DATALINK_OPENING);
 166     if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
 167         bundle_Phase(dl->bundle) == PHASE_TERMINATE)
 168       bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
 169     if (dl->dial.tries < 0) {
 170       datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout);
 171       dl->dial.tries = dl->cfg.dial.max;
 172       dl->dial.incs = 0;
 173       dl->reconnect_tries--;
 174       log_Printf(LogCHAT, "%s: Reconnect try %d of %d\n",
 175                  dl->name, dl->cfg.reconnect.max - dl->reconnect_tries,
 176                  dl->cfg.reconnect.max);
 177       bundle_Notify(dl->bundle, EX_RECONNECT);
 178     } else {
 179       if (dl->phone.next == NULL)
 180         datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
 181       else
 182         datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout);
 183       bundle_Notify(dl->bundle, EX_REDIAL);
 184     }
 185   }
 186 }
 187
 188 const char *
 189 datalink_ChoosePhoneNumber(struct datalink *dl)
 190 {
 191   char *phone;
 192
 193   if (dl->phone.alt == NULL) {
 194     if (dl->phone.next == NULL) {
 195       strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1);
 196       dl->phone.list[sizeof dl->phone.list - 1] = '\0';
 197       if (*dl->phone.list == '\0')
 198         return "";
 199       dl->phone.next = dl->phone.list;
 200     }
 201     dl->phone.alt = strsep(&dl->phone.next, ":");
 202   }
 203   phone = strsep(&dl->phone.alt, "|");
 204   dl->phone.chosen = *phone ? phone : "[NONE]";
 205   if (*phone)
 206     log_Printf(LogCHAT, "Phone: %s\n", phone);
 207   return phone;
 208 }
 209
 210 static void
 211 datalink_LoginDone(struct datalink *dl)
 212 {
 213   chat_Finish(&dl->chat);
 214
 215   if (!dl->script.packetmode) {
 216     dl->dial.tries = -1;
 217     dl->dial.incs = 0;
 218     datalink_NewState(dl, DATALINK_READY);
 219   } else if (!physical_Raw(dl->physical)) {
 220     dl->dial.tries = 0;
 221     log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n");
 222     if (dl->script.run) {
 223       datalink_NewState(dl, DATALINK_LOGOUT);
 224       if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
 225         log_Printf(LogWARN, "Invalid logout script\n");
 226     } else {
 227       physical_StopDeviceTimer(dl->physical);
 228       if (dl->physical->type == PHYS_DEDICATED)
 229         /* force a redial timeout */
 230         physical_Close(dl->physical);
 231       datalink_HangupDone(dl);
 232     }
 233   } else {
 234     dl->dial.tries = -1;
 235     dl->dial.incs = 0;
 236
 237     hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp);
 238     async_Setup(&dl->physical->async);
 239
 240     lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ?
 241               0 : dl->physical->link.lcp.cfg.openmode);
 242     ccp_Setup(&dl->physical->link.ccp);
 243
 244     datalink_NewState(dl, DATALINK_LCP);
 245     fsm_Up(&dl->physical->link.lcp.fsm);
 246     fsm_Open(&dl->physical->link.lcp.fsm);
 247   }
 248 }
 249
 250 static int
 251 datalink_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
 252                    int *n)
 253 {
 254   struct datalink *dl = descriptor2datalink(d);
 255   int result;
 256
 257   result = 0;
 258   switch (dl->state) {
 259     case DATALINK_CLOSED:
 260       if ((dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED|PHYS_BACKGROUND|
 261                                  PHYS_FOREGROUND|PHYS_DDIAL)) &&
 262           !dl->bundle->CleaningUp)
 263         /*
 264          * Our first time in - DEDICATED & DDIAL never come down, and
 265          * DIRECT, FOREGROUND & BACKGROUND get deleted when they enter
 266          * DATALINK_CLOSED.  Go to DATALINK_OPENING via datalink_Up()
 267          * and fall through.
 268          */
 269         datalink_Up(dl, 1, 1);
 270       else
 271         break;
 272       /* FALLTHROUGH */
 273
 274     case DATALINK_OPENING:
 275       if (dl->dial.timer.state != TIMER_RUNNING) {
 276         if (--dl->dial.tries < 0)
 277           dl->dial.tries = 0;
 278         if (physical_Open(dl->physical, dl->bundle) >= 0) {
 279           log_WritePrompts(dl, "%s: Entering terminal mode on %s\r\n"
 280                            "Type `~?' for help\r\n", dl->name,
 281                            dl->physical->name.full);
 282           if (dl->script.run) {
 283             datalink_NewState(dl, DATALINK_DIAL);
 284             if (!chat_Setup(&dl->chat, dl->cfg.script.dial,
 285                             *dl->cfg.script.dial ?
 286                             datalink_ChoosePhoneNumber(dl) : ""))
 287               log_Printf(LogWARN, "Invalid dial script\n");
 288             if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
 289                 dl->cfg.dial.max)
 290               log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n",
 291                         dl->name, dl->cfg.dial.max - dl->dial.tries,
 292                         dl->cfg.dial.max);
 293           } else
 294             datalink_NewState(dl, DATALINK_CARRIER);
 295           return datalink_UpdateSet(d, r, w, e, n);
 296         } else {
 297           if (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
 298               dl->cfg.dial.max)
 299             log_Printf(LogCHAT, "Failed to open device (attempt %u of %d)\n",
 300                        dl->cfg.dial.max - dl->dial.tries, dl->cfg.dial.max);
 301           else
 302             log_Printf(LogCHAT, "Failed to open device\n");
 303
 304           if (dl->bundle->CleaningUp ||
 305               (!(dl->physical->type & (PHYS_DDIAL|PHYS_DEDICATED)) &&
 306                dl->cfg.dial.max && dl->dial.tries == 0)) {
 307             datalink_NewState(dl, DATALINK_CLOSED);
 308             dl->reconnect_tries = 0;
 309             dl->dial.tries = -1;
 310             log_WritePrompts(dl, "Failed to open %s\n",
 311                              dl->physical->name.full);
 312             bundle_LinkClosed(dl->bundle, dl);
 313           }
 314           if (!dl->bundle->CleaningUp) {
 315             int timeout;
 316
 317             timeout = datalink_StartDialTimer(dl, datalink_GetDialTimeout(dl));
 318             bundle_Notify(dl->bundle, EX_REDIAL);
 319             log_WritePrompts(dl, "Failed to open %s, pause %d seconds\n",
 320                              dl->physical->name.full, timeout);
 321           }
 322         }
 323       }
 324       break;
 325
 326     case DATALINK_CARRIER:
 327       /* Wait for carrier on the device */
 328       switch (physical_AwaitCarrier(dl->physical)) {
 329         case CARRIER_PENDING:
 330           log_Printf(LogDEBUG, "Waiting for carrier\n");
 331           return 0;     /* A device timer is running to wake us up again */
 332
 333         case CARRIER_OK:
 334           if (dl->script.run) {
 335             datalink_NewState(dl, DATALINK_LOGIN);
 336             if (!chat_Setup(&dl->chat, dl->cfg.script.login, NULL))
 337               log_Printf(LogWARN, "Invalid login script\n");
 338           } else
 339             datalink_LoginDone(dl);
 340           return datalink_UpdateSet(d, r, w, e, n);
 341
 342         case CARRIER_LOST:
 343           physical_Offline(dl->physical);       /* Is this required ? */
 344           if (dl->script.run) {
 345             datalink_NewState(dl, DATALINK_HANGUP);
 346             if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
 347               log_Printf(LogWARN, "Invalid hangup script\n");
 348             return datalink_UpdateSet(d, r, w, e, n);
 349           } else {
 350             datalink_HangupDone(dl);
 351             return 0;   /* Maybe bundle_CleanDatalinks() has something to do */
 352           }
 353       }
 354
 355     case DATALINK_HANGUP:
 356     case DATALINK_DIAL:
 357     case DATALINK_LOGOUT:
 358     case DATALINK_LOGIN:
 359       result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
 360       switch (dl->chat.state) {
 361         case CHAT_DONE:
 362           /* script succeeded */
 363           switch(dl->state) {
 364             case DATALINK_HANGUP:
 365               datalink_HangupDone(dl);
 366               break;
 367             case DATALINK_DIAL:
 368               datalink_NewState(dl, DATALINK_CARRIER);
 369               return datalink_UpdateSet(d, r, w, e, n);
 370             case DATALINK_LOGOUT:
 371               datalink_NewState(dl, DATALINK_HANGUP);
 372               physical_Offline(dl->physical);
 373               if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
 374                 log_Printf(LogWARN, "Invalid hangup script\n");
 375               return datalink_UpdateSet(d, r, w, e, n);
 376             case DATALINK_LOGIN:
 377               dl->phone.alt = NULL;
 378               datalink_LoginDone(dl);
 379               return datalink_UpdateSet(d, r, w, e, n);
 380           }
 381           break;
 382         case CHAT_FAILED:
 383           /* Going down - script failed */
 384           log_Printf(LogWARN, "Chat script failed\n");
 385           switch(dl->state) {
 386             case DATALINK_HANGUP:
 387               datalink_HangupDone(dl);
 388               break;
 389             case DATALINK_DIAL:
 390             case DATALINK_LOGOUT:
 391             case DATALINK_LOGIN:
 392               datalink_NewState(dl, DATALINK_HANGUP);
 393               physical_Offline(dl->physical);
 394               if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
 395                 log_Printf(LogWARN, "Invalid hangup script\n");
 396               return datalink_UpdateSet(d, r, w, e, n);
 397           }
 398           break;
 399       }
 400       break;
 401
 402     case DATALINK_READY:
 403     case DATALINK_LCP:
 404     case DATALINK_AUTH:
 405     case DATALINK_CBCP:
 406     case DATALINK_OPEN:
 407       result = descriptor_UpdateSet(&dl->chap.desc, r, w, e, n) +
 408                descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
 409       break;
 410   }
 411   return result;
 412 }
 413
 414 int
 415 datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
 416 {
 417   return physical_RemoveFromSet(dl->physical, r, w, e);
 418 }
 419
 420 static int
 421 datalink_IsSet(struct fdescriptor *d, const fd_set *fdset)
 422 {
 423   struct datalink *dl = descriptor2datalink(d);
 424
 425   switch (dl->state) {
 426     case DATALINK_CLOSED:
 427     case DATALINK_OPENING:
 428       break;
 429
 430     case DATALINK_HANGUP:
 431     case DATALINK_DIAL:
 432     case DATALINK_LOGOUT:
 433     case DATALINK_LOGIN:
 434       return descriptor_IsSet(&dl->chat.desc, fdset);
 435
 436     case DATALINK_READY:
 437     case DATALINK_LCP:
 438     case DATALINK_AUTH:
 439     case DATALINK_CBCP:
 440     case DATALINK_OPEN:
 441       return descriptor_IsSet(&dl->chap.desc, fdset) ? 1 :
 442              descriptor_IsSet(&dl->physical->desc, fdset);
 443   }
 444   return 0;
 445 }
 446
 447 static void
 448 datalink_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
 449 {
 450   struct datalink *dl = descriptor2datalink(d);
 451
 452   switch (dl->state) {
 453     case DATALINK_CLOSED:
 454     case DATALINK_OPENING:
 455       break;
 456
 457     case DATALINK_HANGUP:
 458     case DATALINK_DIAL:
 459     case DATALINK_LOGOUT:
 460     case DATALINK_LOGIN:
 461       descriptor_Read(&dl->chat.desc, bundle, fdset);
 462       break;
 463
 464     case DATALINK_READY:
 465     case DATALINK_LCP:
 466     case DATALINK_AUTH:
 467     case DATALINK_CBCP:
 468     case DATALINK_OPEN:
 469       if (descriptor_IsSet(&dl->chap.desc, fdset))
 470         descriptor_Read(&dl->chap.desc, bundle, fdset);
 471       if (descriptor_IsSet(&dl->physical->desc, fdset))
 472         descriptor_Read(&dl->physical->desc, bundle, fdset);
 473       break;
 474   }
 475 }
 476
 477 static int
 478 datalink_Write(struct fdescriptor *d, struct bundle *bundle,
 479                const fd_set *fdset)
 480 {
 481   struct datalink *dl = descriptor2datalink(d);
 482   int result = 0;
 483
 484   switch (dl->state) {
 485     case DATALINK_CLOSED:
 486     case DATALINK_OPENING:
 487       break;
 488
 489     case DATALINK_HANGUP:
 490     case DATALINK_DIAL:
 491     case DATALINK_LOGOUT:
 492     case DATALINK_LOGIN:
 493       if ((result = descriptor_Write(&dl->chat.desc, bundle, fdset)) == -1) {
 494         datalink_ComeDown(dl, CLOSE_NORMAL);
 495         result = 0;
 496       }
 497       break;
 498
 499     case DATALINK_READY:
 500     case DATALINK_LCP:
 501     case DATALINK_AUTH:
 502     case DATALINK_CBCP:
 503     case DATALINK_OPEN:
 504       if (descriptor_IsSet(&dl->chap.desc, fdset))
 505         switch (descriptor_Write(&dl->chap.desc, bundle, fdset)) {
 506         case -1:
 507           datalink_ComeDown(dl, CLOSE_NORMAL);
 508           break;
 509         case 1:
 510           result++;
 511         }
 512       if (descriptor_IsSet(&dl->physical->desc, fdset))
 513         switch (descriptor_Write(&dl->physical->desc, bundle, fdset)) {
 514         case -1:
 515           datalink_ComeDown(dl, CLOSE_NORMAL);
 516           break;
 517         case 1:
 518           result++;
 519         }
 520       break;
 521   }
 522
 523   return result;
 524 }
 525
 526 void
 527 datalink_ComeDown(struct datalink *dl, int how)
 528 {
 529   int stayonline;
 530
 531   if (how == CLOSE_LCP)
 532     datalink_DontHangup(dl);
 533   else if (how == CLOSE_STAYDOWN)
 534     datalink_StayDown(dl);
 535
 536   stayonline = dl->stayonline;
 537   dl->stayonline = 0;
 538
 539   if (dl->state >= DATALINK_READY && stayonline) {
 540     physical_StopDeviceTimer(dl->physical);
 541     datalink_NewState(dl, DATALINK_READY);
 542   } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
 543     physical_Offline(dl->physical);
 544     if (dl->script.run && dl->state != DATALINK_OPENING) {
 545       if (dl->state == DATALINK_LOGOUT) {
 546         datalink_NewState(dl, DATALINK_HANGUP);
 547         if (!chat_Setup(&dl->chat, dl->cfg.script.hangup, NULL))
 548           log_Printf(LogWARN, "Invalid hangup script\n");
 549       } else {
 550         datalink_NewState(dl, DATALINK_LOGOUT);
 551         if (!chat_Setup(&dl->chat, dl->cfg.script.logout, NULL))
 552           log_Printf(LogWARN, "Invalid logout script\n");
 553       }
 554     } else
 555       datalink_HangupDone(dl);
 556   }
 557 }
 558
 559 static void
 560 datalink_LayerStart(void *v, struct fsm *fp)
 561 {
 562   /* The given FSM is about to start up ! */
 563   struct datalink *dl = (struct datalink *)v;
 564
 565   if (fp->proto == PROTO_LCP)
 566     (*dl->parent->LayerStart)(dl->parent->object, fp);
 567 }
 568
 569 static void
 570 datalink_LayerUp(void *v, struct fsm *fp)
 571 {
 572   /* The given fsm is now up */
 573   struct datalink *dl = (struct datalink *)v;
 574   struct lcp *lcp = &dl->physical->link.lcp;
 575
 576   if (fp->proto == PROTO_LCP) {
 577     datalink_GotAuthname(dl, "");
 578     lcp->auth_ineed = lcp->want_auth;
 579     lcp->auth_iwait = lcp->his_auth;
 580     if (lcp->his_auth || lcp->want_auth) {
 581       if (bundle_Phase(dl->bundle) != PHASE_NETWORK)
 582         bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE);
 583       log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name,
 584                 Auth2Nam(lcp->his_auth, lcp->his_authtype),
 585                 Auth2Nam(lcp->want_auth, lcp->want_authtype));
 586       if (lcp->his_auth == PROTO_PAP)
 587         auth_StartReq(&dl->pap);
 588       if (lcp->want_auth == PROTO_CHAP)
 589         auth_StartReq(&dl->chap.auth);
 590     } else
 591       datalink_AuthOk(dl);
 592   } else if (fp->proto == PROTO_CCP)
 593     (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.ccp.fsm);
 594 }
 595
 596 static void
 597 datalink_AuthReInit(struct datalink *dl)
 598 {
 599   auth_StopTimer(&dl->pap);
 600   auth_StopTimer(&dl->chap.auth);
 601   chap_ReInit(&dl->chap);
 602 }
 603
 604 void
 605 datalink_GotAuthname(struct datalink *dl, const char *name)
 606 {
 607   strncpy(dl->peer.authname, name, sizeof dl->peer.authname - 1);
 608   dl->peer.authname[sizeof dl->peer.authname - 1] = '\0';
 609 }
 610
 611 void
 612 datalink_NCPUp(struct datalink *dl)
 613 {
 614   int ccpok = ccp_SetOpenMode(&dl->physical->link.ccp);
 615
 616   if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) {
 617     /* we've authenticated in multilink mode ! */
 618     switch (mp_Up(&dl->bundle->ncp.mp, dl)) {
 619       case MP_LINKSENT:
 620         /* We've handed the link off to another ppp (well, we will soon) ! */
 621         return;
 622       case MP_UP:
 623         /* First link in the bundle */
 624         auth_Select(dl->bundle, dl->peer.authname);
 625         bundle_CalculateBandwidth(dl->bundle);
 626         /* FALLTHROUGH */
 627       case MP_ADDED:
 628         /* We're in multilink mode ! */
 629         dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;    /* override */
 630         bundle_CalculateBandwidth(dl->bundle);
 631         break;
 632       case MP_FAILED:
 633         datalink_AuthNotOk(dl);
 634         return;
 635     }
 636   } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) {
 637     log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name);
 638     datalink_NewState(dl, DATALINK_OPEN);
 639     bundle_CalculateBandwidth(dl->bundle);
 640     (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
 641     return;
 642   } else {
 643     dl->bundle->ncp.mp.peer = dl->peer;
 644     ncp_SetLink(&dl->bundle->ncp, &dl->physical->link);
 645     auth_Select(dl->bundle, dl->peer.authname);
 646   }
 647
 648   if (ccpok) {
 649     fsm_Up(&dl->physical->link.ccp.fsm);
 650     fsm_Open(&dl->physical->link.ccp.fsm);
 651   }
 652   datalink_NewState(dl, DATALINK_OPEN);
 653   bundle_NewPhase(dl->bundle, PHASE_NETWORK);
 654   (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm);
 655 }
 656
 657 void
 658 datalink_CBCPComplete(struct datalink *dl)
 659 {
 660   datalink_NewState(dl, DATALINK_LCP);
 661   datalink_AuthReInit(dl);
 662   fsm_Close(&dl->physical->link.lcp.fsm);
 663 }
 664
 665 void
 666 datalink_CBCPFailed(struct datalink *dl)
 667 {
 668   cbcp_Down(&dl->cbcp);
 669   datalink_CBCPComplete(dl);
 670 }
 671
 672 void
 673 datalink_AuthOk(struct datalink *dl)
 674 {
 675   if ((dl->physical->link.lcp.his_callback.opmask &
 676        CALLBACK_BIT(CALLBACK_CBCP) ||
 677        dl->physical->link.lcp.want_callback.opmask &
 678        CALLBACK_BIT(CALLBACK_CBCP)) &&
 679       !(dl->physical->link.lcp.want_callback.opmask &
 680         CALLBACK_BIT(CALLBACK_AUTH))) {
 681     /* We must have agreed CBCP if AUTH isn't there any more */
 682     datalink_NewState(dl, DATALINK_CBCP);
 683     cbcp_Up(&dl->cbcp);
 684   } else if (dl->physical->link.lcp.want_callback.opmask) {
 685     /* It's not CBCP */
 686     log_Printf(LogPHASE, "%s: Shutdown and await peer callback\n", dl->name);
 687     datalink_NewState(dl, DATALINK_LCP);
 688     datalink_AuthReInit(dl);
 689     fsm_Close(&dl->physical->link.lcp.fsm);
 690   } else
 691     switch (dl->physical->link.lcp.his_callback.opmask) {
 692       case 0:
 693         datalink_NCPUp(dl);
 694         break;
 695
 696       case CALLBACK_BIT(CALLBACK_AUTH):
 697         auth_SetPhoneList(dl->peer.authname, dl->cbcp.fsm.phone,
 698                           sizeof dl->cbcp.fsm.phone);
 699         if (*dl->cbcp.fsm.phone == '\0' || !strcmp(dl->cbcp.fsm.phone, "*")) {
 700           log_Printf(LogPHASE, "%s: %s cannot be called back\n", dl->name,
 701                      dl->peer.authname);
 702           *dl->cbcp.fsm.phone = '\0';
 703         } else {
 704           char *ptr = strchr(dl->cbcp.fsm.phone, ',');
 705           if (ptr)
 706             *ptr = '\0';        /* Call back on the first number */
 707           log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
 708                      dl->cbcp.fsm.phone);
 709           dl->cbcp.required = 1;
 710         }
 711         dl->cbcp.fsm.delay = 0;
 712         datalink_NewState(dl, DATALINK_LCP);
 713         datalink_AuthReInit(dl);
 714         fsm_Close(&dl->physical->link.lcp.fsm);
 715         break;
 716
 717       case CALLBACK_BIT(CALLBACK_E164):
 718         strncpy(dl->cbcp.fsm.phone, dl->physical->link.lcp.his_callback.msg,
 719                 sizeof dl->cbcp.fsm.phone - 1);
 720         dl->cbcp.fsm.phone[sizeof dl->cbcp.fsm.phone - 1] = '\0';
 721         log_Printf(LogPHASE, "%s: Calling peer back on %s\n", dl->name,
 722                    dl->cbcp.fsm.phone);
 723         dl->cbcp.required = 1;
 724         dl->cbcp.fsm.delay = 0;
 725         datalink_NewState(dl, DATALINK_LCP);
 726         datalink_AuthReInit(dl);
 727         fsm_Close(&dl->physical->link.lcp.fsm);
 728         break;
 729
 730       default:
 731         log_Printf(LogPHASE, "%s: Oops - Should have NAK'd peer callback !\n",
 732                    dl->name);
 733         datalink_NewState(dl, DATALINK_LCP);
 734         datalink_AuthReInit(dl);
 735         fsm_Close(&dl->physical->link.lcp.fsm);
 736         break;
 737     }
 738 }
 739
 740 void
 741 datalink_AuthNotOk(struct datalink *dl)
 742 {
 743   datalink_NewState(dl, DATALINK_LCP);
 744   datalink_AuthReInit(dl);
 745   fsm_Close(&dl->physical->link.lcp.fsm);
 746 }
 747
 748 static void
 749 datalink_LayerDown(void *v, struct fsm *fp)
 750 {
 751   /* The given FSM has been told to come down */
 752   struct datalink *dl = (struct datalink *)v;
 753
 754   if (fp->proto == PROTO_LCP) {
 755     switch (dl->state) {
 756       case DATALINK_OPEN:
 757         peerid_Init(&dl->peer);
 758         fsm2initial(&dl->physical->link.ccp.fsm);
 759         datalink_NewState(dl, DATALINK_LCP);  /* before parent TLD */
 760         (*dl->parent->LayerDown)(dl->parent->object, fp);
 761         /* FALLTHROUGH (just in case) */
 762
 763       case DATALINK_CBCP:
 764         if (!dl->cbcp.required)
 765           cbcp_Down(&dl->cbcp);
 766         /* FALLTHROUGH (just in case) */
 767
 768       case DATALINK_AUTH:
 769         timer_Stop(&dl->pap.authtimer);
 770         timer_Stop(&dl->chap.auth.authtimer);
 771     }
 772     datalink_NewState(dl, DATALINK_LCP);
 773     datalink_AuthReInit(dl);
 774   }
 775 }
 776
 777 static void
 778 datalink_LayerFinish(void *v, struct fsm *fp)
 779 {
 780   /* The given fsm is now down */
 781   struct datalink *dl = (struct datalink *)v;
 782
 783   if (fp->proto == PROTO_LCP) {
 784     fsm2initial(fp);
 785     (*dl->parent->LayerFinish)(dl->parent->object, fp);
 786     datalink_ComeDown(dl, CLOSE_NORMAL);
 787   } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
 788     fsm_Open(fp);               /* CCP goes to ST_STOPPED */
 789 }
 790
 791 struct datalink *
 792 datalink_Create(const char *name, struct bundle *bundle, int type)
 793 {
 794   struct datalink *dl;
 795
 796   dl = (struct datalink *)malloc(sizeof(struct datalink));
 797   if (dl == NULL)
 798     return dl;
 799
 800   dl->desc.type = DATALINK_DESCRIPTOR;
 801   dl->desc.UpdateSet = datalink_UpdateSet;
 802   dl->desc.IsSet = datalink_IsSet;
 803   dl->desc.Read = datalink_Read;
 804   dl->desc.Write = datalink_Write;
 805
 806   dl->state = DATALINK_CLOSED;
 807
 808   *dl->cfg.script.dial = '\0';
 809   *dl->cfg.script.login = '\0';
 810   *dl->cfg.script.logout = '\0';
 811   *dl->cfg.script.hangup = '\0';
 812   *dl->cfg.phone.list = '\0';
 813   *dl->phone.list = '\0';
 814   dl->phone.next = NULL;
 815   dl->phone.alt = NULL;
 816   dl->phone.chosen = "N/A";
 817   dl->stayonline = 0;
 818   dl->script.run = 1;
 819   dl->script.packetmode = 1;
 820   mp_linkInit(&dl->mp);
 821
 822   dl->bundle = bundle;
 823   dl->next = NULL;
 824
 825   memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
 826
 827   dl->dial.tries = 0;
 828   dl->cfg.dial.max = 1;
 829   dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
 830   dl->cfg.dial.timeout = DIAL_TIMEOUT;
 831   dl->cfg.dial.inc = 0;
 832   dl->cfg.dial.maxinc = 10;
 833
 834   dl->reconnect_tries = 0;
 835   dl->cfg.reconnect.max = 0;
 836   dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT;
 837
 838   dl->cfg.callback.opmask = 0;
 839   dl->cfg.cbcp.delay = 0;
 840   *dl->cfg.cbcp.phone = '\0';
 841   dl->cfg.cbcp.fsmretry = DEF_FSMRETRY;
 842
 843   dl->name = strdup(name);
 844   peerid_Init(&dl->peer);
 845   dl->parent = &bundle->fsm;
 846   dl->fsmp.LayerStart = datalink_LayerStart;
 847   dl->fsmp.LayerUp = datalink_LayerUp;
 848   dl->fsmp.LayerDown = datalink_LayerDown;
 849   dl->fsmp.LayerFinish = datalink_LayerFinish;
 850   dl->fsmp.object = dl;
 851
 852   if ((dl->physical = physical_Create(dl, type)) == NULL) {
 853     free(dl->name);
 854     free(dl);
 855     return NULL;
 856   }
 857
 858   pap_Init(&dl->pap, dl->physical);
 859   chap_Init(&dl->chap, dl->physical);
 860   cbcp_Init(&dl->cbcp, dl->physical);
 861
 862   memset(&dl->chat, '\0', sizeof dl->chat);     /* Force buf{start,end} reset */
 863   chat_Init(&dl->chat, dl->physical);
 864
 865   log_Printf(LogPHASE, "%s: Created in %s state\n",
 866              dl->name, datalink_State(dl));
 867
 868   return dl;
 869 }
 870
 871 struct datalink *
 872 datalink_Clone(struct datalink *odl, const char *name)
 873 {
 874   struct datalink *dl;
 875
 876   dl = (struct datalink *)malloc(sizeof(struct datalink));
 877   if (dl == NULL)
 878     return dl;
 879
 880   dl->desc.type = DATALINK_DESCRIPTOR;
 881   dl->desc.UpdateSet = datalink_UpdateSet;
 882   dl->desc.IsSet = datalink_IsSet;
 883   dl->desc.Read = datalink_Read;
 884   dl->desc.Write = datalink_Write;
 885
 886   dl->state = DATALINK_CLOSED;
 887
 888   memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg);
 889   mp_linkInit(&dl->mp);
 890   *dl->phone.list = '\0';
 891   dl->phone.next = NULL;
 892   dl->phone.alt = NULL;
 893   dl->phone.chosen = "N/A";
 894   dl->bundle = odl->bundle;
 895   dl->next = NULL;
 896   memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
 897   dl->dial.tries = 0;
 898   dl->reconnect_tries = 0;
 899   dl->name = strdup(name);
 900   peerid_Init(&dl->peer);
 901   dl->parent = odl->parent;
 902   memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp);
 903   dl->fsmp.object = dl;
 904
 905   if ((dl->physical = physical_Create(dl, PHYS_INTERACTIVE)) == NULL) {
 906     free(dl->name);
 907     free(dl);
 908     return NULL;
 909   }
 910   pap_Init(&dl->pap, dl->physical);
 911   dl->pap.cfg = odl->pap.cfg;
 912
 913   chap_Init(&dl->chap, dl->physical);
 914   dl->chap.auth.cfg = odl->chap.auth.cfg;
 915
 916   memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg);
 917   memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg,
 918          sizeof dl->physical->link.lcp.cfg);
 919   memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg,
 920          sizeof dl->physical->link.ccp.cfg);
 921   memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg,
 922          sizeof dl->physical->async.cfg);
 923
 924   cbcp_Init(&dl->cbcp, dl->physical);
 925
 926   memset(&dl->chat, '\0', sizeof dl->chat);     /* Force buf{start,end} reset */
 927   chat_Init(&dl->chat, dl->physical);
 928
 929   log_Printf(LogPHASE, "%s: Cloned in %s state\n",
 930              dl->name, datalink_State(dl));
 931
 932   return dl;
 933 }
 934
 935 struct datalink *
 936 datalink_Destroy(struct datalink *dl)
 937 {
 938   struct datalink *result;
 939
 940   if (dl->state != DATALINK_CLOSED) {
 941     log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n",
 942               datalink_State(dl));
 943     switch (dl->state) {
 944       case DATALINK_HANGUP:
 945       case DATALINK_DIAL:
 946       case DATALINK_LOGIN:
 947         chat_Finish(&dl->chat);         /* Gotta blat the timers ! */
 948         break;
 949     }
 950   }
 951
 952   chat_Destroy(&dl->chat);
 953   timer_Stop(&dl->dial.timer);
 954   result = dl->next;
 955   physical_Destroy(dl->physical);
 956   free(dl->name);
 957   free(dl);
 958
 959   return result;
 960 }
 961
 962 void
 963 datalink_Up(struct datalink *dl, int runscripts, int packetmode)
 964 {
 965   if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
 966     /* Ignore scripts */
 967     runscripts = 0;
 968
 969   switch (dl->state) {
 970     case DATALINK_CLOSED:
 971       if (bundle_Phase(dl->bundle) == PHASE_DEAD ||
 972           bundle_Phase(dl->bundle) == PHASE_TERMINATE)
 973         bundle_NewPhase(dl->bundle, PHASE_ESTABLISH);
 974       datalink_NewState(dl, DATALINK_OPENING);
 975       dl->reconnect_tries =
 976         dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max;
 977       dl->dial.tries = dl->cfg.dial.max;
 978       dl->script.run = runscripts;
 979       dl->script.packetmode = packetmode;
 980       break;
 981
 982     case DATALINK_OPENING:
 983       if (!dl->script.run && runscripts)
 984         dl->script.run = 1;
 985       /* FALLTHROUGH */
 986
 987     case DATALINK_DIAL:
 988     case DATALINK_LOGIN:
 989     case DATALINK_READY:
 990       if (!dl->script.packetmode && packetmode) {
 991         dl->script.packetmode = 1;
 992         if (dl->state == DATALINK_READY) {
 993           dl->script.run = 0;
 994           datalink_NewState(dl, DATALINK_CARRIER);
 995         }
 996       }
 997       break;
 998   }
 999 }
1000
1001 void
1002 datalink_Close(struct datalink *dl, int how)
1003 {
1004   /* Please close */
1005   switch (dl->state) {
1006     case DATALINK_OPEN:
1007       peerid_Init(&dl->peer);
1008       fsm2initial(&dl->physical->link.ccp.fsm);
1009       /* FALLTHROUGH */
1010
1011     case DATALINK_CBCP:
1012     case DATALINK_AUTH:
1013     case DATALINK_LCP:
1014       datalink_AuthReInit(dl);
1015       if (how == CLOSE_LCP)
1016         datalink_DontHangup(dl);
1017       else if (how == CLOSE_STAYDOWN)
1018         datalink_StayDown(dl);
1019       fsm_Close(&dl->physical->link.lcp.fsm);
1020       break;
1021
1022     default:
1023       datalink_ComeDown(dl, how);
1024   }
1025 }
1026
1027 void
1028 datalink_Down(struct datalink *dl, int how)
1029 {
1030   /* Carrier is lost */
1031   switch (dl->state) {
1032     case DATALINK_OPEN:
1033       peerid_Init(&dl->peer);
1034       fsm2initial(&dl->physical->link.ccp.fsm);
1035       /* FALLTHROUGH */
1036
1037     case DATALINK_CBCP:
1038     case DATALINK_AUTH:
1039     case DATALINK_LCP:
1040       fsm2initial(&dl->physical->link.lcp.fsm);
1041       if (dl->state == DATALINK_OPENING)
1042         return;                 /* we're doing a callback... */
1043       /* FALLTHROUGH */
1044
1045     default:
1046       datalink_ComeDown(dl, how);
1047   }
1048 }
1049
1050 void
1051 datalink_StayDown(struct datalink *dl)
1052 {
1053   dl->dial.tries = -1;
1054   dl->reconnect_tries = 0;
1055   dl->stayonline = 0;
1056 }
1057
1058 void
1059 datalink_DontHangup(struct datalink *dl)
1060 {
1061   dl->dial.tries = -1;
1062   dl->reconnect_tries = 0;
1063   dl->stayonline = dl->state >= DATALINK_LCP ? 1 : 0;
1064 }
1065
1066 int
1067 datalink_Show(struct cmdargs const *arg)
1068 {
1069   prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name);
1070   prompt_Printf(arg->prompt, " State:              %s\n",
1071                 datalink_State(arg->cx));
1072   prompt_Printf(arg->prompt, " Peer name:          ");
1073   if (*arg->cx->peer.authname)
1074     prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname);
1075   else if (arg->cx->state == DATALINK_OPEN)
1076     prompt_Printf(arg->prompt, "None requested\n");
1077   else
1078     prompt_Printf(arg->prompt, "N/A\n");
1079   prompt_Printf(arg->prompt, " Discriminator:      %s\n",
1080                 mp_Enddisc(arg->cx->peer.enddisc.class,
1081                            arg->cx->peer.enddisc.address,
1082                            arg->cx->peer.enddisc.len));
1083
1084   prompt_Printf(arg->prompt, "\nDefaults:\n");
1085   prompt_Printf(arg->prompt, " Phone List:         %s\n",
1086                 arg->cx->cfg.phone.list);
1087   if (arg->cx->cfg.dial.max)
1088     prompt_Printf(arg->prompt, " Dial tries:         %d, delay ",
1089                   arg->cx->cfg.dial.max);
1090   else
1091     prompt_Printf(arg->prompt, " Dial tries:         infinite, delay ");
1092   if (arg->cx->cfg.dial.next_timeout >= 0)
1093     prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout);
1094   else
1095     prompt_Printf(arg->prompt, "random/");
1096   if (arg->cx->cfg.dial.timeout >= 0)
1097     prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout);
1098   else
1099     prompt_Printf(arg->prompt, "random\n");
1100   prompt_Printf(arg->prompt, " Reconnect tries:    %d, delay ",
1101                 arg->cx->cfg.reconnect.max);
1102   if (arg->cx->cfg.reconnect.timeout > 0)
1103     prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout);
1104   else
1105     prompt_Printf(arg->prompt, "random\n");
1106   prompt_Printf(arg->prompt, " Callback %s ", arg->cx->physical->type ==
1107                 PHYS_DIRECT ?  "accepted: " : "requested:");
1108   if (!arg->cx->cfg.callback.opmask)
1109     prompt_Printf(arg->prompt, "none\n");
1110   else {
1111     int comma = 0;
1112
1113     if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
1114       prompt_Printf(arg->prompt, "none");
1115       comma = 1;
1116     }
1117     if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
1118       prompt_Printf(arg->prompt, "%sauth", comma ? ", " : "");
1119       comma = 1;
1120     }
1121     if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
1122       prompt_Printf(arg->prompt, "%sE.164", comma ? ", " : "");
1123       if (arg->cx->physical->type != PHYS_DIRECT)
1124         prompt_Printf(arg->prompt, " (%s)", arg->cx->cfg.callback.msg);
1125       comma = 1;
1126     }
1127     if (arg->cx->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
1128       prompt_Printf(arg->prompt, "%scbcp\n", comma ? ", " : "");
1129       prompt_Printf(arg->prompt, " CBCP:               delay: %ds\n",
1130                     arg->cx->cfg.cbcp.delay);
1131       prompt_Printf(arg->prompt, "                     phone: ");
1132       if (!strcmp(arg->cx->cfg.cbcp.phone, "*")) {
1133         if (arg->cx->physical->type & PHYS_DIRECT)
1134           prompt_Printf(arg->prompt, "Caller decides\n");
1135         else
1136           prompt_Printf(arg->prompt, "Dialback server decides\n");
1137       } else
1138         prompt_Printf(arg->prompt, "%s\n", arg->cx->cfg.cbcp.phone);
1139       prompt_Printf(arg->prompt, "                     timeout: %lds\n",
1140                     arg->cx->cfg.cbcp.fsmretry);
1141     } else
1142       prompt_Printf(arg->prompt, "\n");
1143   }
1144
1145   prompt_Printf(arg->prompt, " Dial Script:        %s\n",
1146                 arg->cx->cfg.script.dial);
1147   prompt_Printf(arg->prompt, " Login Script:       %s\n",
1148                 arg->cx->cfg.script.login);
1149   prompt_Printf(arg->prompt, " Logout Script:      %s\n",
1150                 arg->cx->cfg.script.logout);
1151   prompt_Printf(arg->prompt, " Hangup Script:      %s\n",
1152                 arg->cx->cfg.script.hangup);
1153   return 0;
1154 }
1155
1156 int
1157 datalink_SetReconnect(struct cmdargs const *arg)
1158 {
1159   if (arg->argc == arg->argn+2) {
1160     arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]);
1161     arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]);
1162     return 0;
1163   }
1164   return -1;
1165 }
1166
1167 int
1168 datalink_SetRedial(struct cmdargs const *arg)
1169 {
1170   const char *sep, *osep;
1171   int timeout, inc, maxinc, tries;
1172
1173   if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) {
1174     if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 &&
1175         (arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) {
1176       arg->cx->cfg.dial.timeout = -1;
1177       randinit();
1178     } else {
1179       timeout = atoi(arg->argv[arg->argn]);
1180
1181       if (timeout >= 0)
1182         arg->cx->cfg.dial.timeout = timeout;
1183       else {
1184         log_Printf(LogWARN, "Invalid redial timeout\n");
1185         return -1;
1186       }
1187     }
1188
1189     sep = strchr(arg->argv[arg->argn], '+');
1190     if (sep) {
1191       inc = atoi(++sep);
1192       osep = sep;
1193       if (inc >= 0)
1194         arg->cx->cfg.dial.inc = inc;
1195       else {
1196         log_Printf(LogWARN, "Invalid timeout increment\n");
1197         return -1;
1198       }
1199       sep = strchr(sep, '-');
1200       if (sep) {
1201         maxinc = atoi(++sep);
1202         if (maxinc >= 0)
1203           arg->cx->cfg.dial.maxinc = maxinc;
1204         else {
1205           log_Printf(LogWARN, "Invalid maximum timeout increments\n");
1206           return -1;
1207         }
1208       } else {
1209         /* Default timeout increment */
1210         arg->cx->cfg.dial.maxinc = 10;
1211         sep = osep;
1212       }
1213     } else {
1214       /* Default timeout increment & max increment */
1215       arg->cx->cfg.dial.inc = 0;
1216       arg->cx->cfg.dial.maxinc = 10;
1217       sep = arg->argv[arg->argn];
1218     }
1219
1220     sep = strchr(sep, '.');
1221     if (sep) {
1222       if (strcasecmp(++sep, "random") == 0) {
1223         arg->cx->cfg.dial.next_timeout = -1;
1224         randinit();
1225       } else {
1226         timeout = atoi(sep);
1227         if (timeout >= 0)
1228           arg->cx->cfg.dial.next_timeout = timeout;
1229         else {
1230           log_Printf(LogWARN, "Invalid next redial timeout\n");
1231           return -1;
1232         }
1233       }
1234     } else
1235       /* Default next timeout */
1236       arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT;
1237
1238     if (arg->argc == arg->argn+2) {
1239       tries = atoi(arg->argv[arg->argn+1]);
1240
1241       if (tries >= 0) {
1242         arg->cx->cfg.dial.max = tries;
1243       } else {
1244         log_Printf(LogWARN, "Invalid retry value\n");
1245         return 1;
1246       }
1247     }
1248     return 0;
1249   }
1250
1251   return -1;
1252 }
1253
1254 static const char * const states[] = {
1255   "closed",
1256   "opening",
1257   "hangup",
1258   "dial",
1259   "carrier",
1260   "logout",
1261   "login",
1262   "ready",
1263   "lcp",
1264   "auth",
1265   "cbcp",
1266   "open"
1267 };
1268
1269 const char *
1270 datalink_State(struct datalink *dl)
1271 {
1272   if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0])
1273     return "unknown";
1274   return states[dl->state];
1275 }
1276
1277 static void
1278 datalink_NewState(struct datalink *dl, int state)
1279 {
1280   if (state != dl->state) {
1281     if (state >= 0 && state < sizeof states / sizeof states[0]) {
1282       log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl),
1283                  states[state]);
1284       dl->state = state;
1285     } else
1286       log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state);
1287   }
1288 }
1289
1290 struct datalink *
1291 iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov,
1292              int fd, int *auxfd, int *nauxfd)
1293 {
1294   struct datalink *dl, *cdl;
1295   struct fsm_retry copy;
1296   char *oname;
1297
1298   dl = (struct datalink *)iov[(*niov)++].iov_base;
1299   dl->name = iov[*niov].iov_base;
1300
1301   if (dl->name[DATALINK_MAXNAME-1]) {
1302     dl->name[DATALINK_MAXNAME-1] = '\0';
1303     if (strlen(dl->name) == DATALINK_MAXNAME - 1)
1304       log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name);
1305   }
1306
1307   /* Make sure the name is unique ! */
1308   oname = NULL;
1309   do {
1310     for (cdl = bundle->links; cdl; cdl = cdl->next)
1311       if (!strcasecmp(dl->name, cdl->name)) {
1312         if (oname)
1313           free(datalink_NextName(dl));
1314         else
1315           oname = datalink_NextName(dl);
1316         break;  /* Keep renaming 'till we have no conflicts */
1317       }
1318   } while (cdl);
1319
1320   if (oname) {
1321     log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name);
1322     free(oname);
1323   } else {
1324     dl->name = strdup(dl->name);
1325     free(iov[*niov].iov_base);
1326   }
1327   (*niov)++;
1328
1329   dl->desc.type = DATALINK_DESCRIPTOR;
1330   dl->desc.UpdateSet = datalink_UpdateSet;
1331   dl->desc.IsSet = datalink_IsSet;
1332   dl->desc.Read = datalink_Read;
1333   dl->desc.Write = datalink_Write;
1334
1335   mp_linkInit(&dl->mp);
1336   *dl->phone.list = '\0';
1337   dl->phone.next = NULL;
1338   dl->phone.alt = NULL;
1339   dl->phone.chosen = "N/A";
1340
1341   dl->bundle = bundle;
1342   dl->next = NULL;
1343   memset(&dl->dial.timer, '\0', sizeof dl->dial.timer);
1344   dl->dial.tries = 0;
1345   dl->reconnect_tries = 0;
1346   dl->parent = &bundle->fsm;
1347   dl->fsmp.LayerStart = datalink_LayerStart;
1348   dl->fsmp.LayerUp = datalink_LayerUp;
1349   dl->fsmp.LayerDown = datalink_LayerDown;
1350   dl->fsmp.LayerFinish = datalink_LayerFinish;
1351   dl->fsmp.object = dl;
1352
1353   dl->physical = iov2physical(dl, iov, niov, maxiov, fd, auxfd, nauxfd);
1354
1355   if (!dl->physical) {
1356     free(dl->name);
1357     free(dl);
1358     dl = NULL;
1359   } else {
1360     copy = dl->pap.cfg.fsm;
1361     pap_Init(&dl->pap, dl->physical);
1362     dl->pap.cfg.fsm = copy;
1363
1364     copy = dl->chap.auth.cfg.fsm;
1365     chap_Init(&dl->chap, dl->physical);
1366     dl->chap.auth.cfg.fsm = copy;
1367
1368     cbcp_Init(&dl->cbcp, dl->physical);
1369
1370     memset(&dl->chat, '\0', sizeof dl->chat);   /* Force buf{start,end} reset */
1371     chat_Init(&dl->chat, dl->physical);
1372
1373     log_Printf(LogPHASE, "%s: Transferred in %s state\n",
1374               dl->name, datalink_State(dl));
1375   }
1376
1377   return dl;
1378 }
1379
1380 int
1381 datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
1382              int *auxfd, int *nauxfd)
1383 {
1384   /* If `dl' is NULL, we're allocating before a Fromiov() */
1385   int link_fd;
1386
1387   if (dl) {
1388     timer_Stop(&dl->dial.timer);
1389     /* The following is purely for the sake of paranoia */
1390     cbcp_Down(&dl->cbcp);
1391     timer_Stop(&dl->pap.authtimer);
1392     timer_Stop(&dl->chap.auth.authtimer);
1393   }
1394
1395   if (*niov >= maxiov - 1) {
1396     log_Printf(LogERROR, "Toiov: No room for datalink !\n");
1397     if (dl) {
1398       free(dl->name);
1399       free(dl);
1400     }
1401     return -1;
1402   }
1403
1404   iov[*niov].iov_base = (void *)dl;
1405   iov[(*niov)++].iov_len = sizeof *dl;
1406   iov[*niov].iov_base = dl ? realloc(dl->name, DATALINK_MAXNAME) : NULL;
1407   iov[(*niov)++].iov_len = DATALINK_MAXNAME;
1408
1409   link_fd = physical2iov(dl ? dl->physical : NULL, iov, niov, maxiov, auxfd,
1410                          nauxfd);
1411
1412   if (link_fd == -1 && dl) {
1413     free(dl->name);
1414     free(dl);
1415   }
1416
1417   return link_fd;
1418 }
1419
1420 void
1421 datalink_Rename(struct datalink *dl, const char *name)
1422 {
1423   free(dl->name);
1424   dl->physical->link.name = dl->name = strdup(name);
1425 }
1426
1427 char *
1428 datalink_NextName(struct datalink *dl)
1429 {
1430   int f, n;
1431   char *name, *oname;
1432
1433   n = strlen(dl->name);
1434   name = (char *)malloc(n+3);
1435   for (f = n - 1; f >= 0; f--)
1436     if (!isdigit(dl->name[f]))
1437       break;
1438   n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name);
1439   sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1);
1440   oname = dl->name;
1441   dl->name = name;
1442   /* our physical link name isn't updated (it probably isn't created yet) */
1443   return oname;
1444 }
1445
1446 int
1447 datalink_SetMode(struct datalink *dl, int mode)
1448 {
1449   if (!physical_SetMode(dl->physical, mode))
1450     return 0;
1451   if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
1452     dl->script.run = 0;
1453   if (dl->physical->type == PHYS_DIRECT)
1454     dl->reconnect_tries = 0;
1455   if (mode & (PHYS_DDIAL|PHYS_BACKGROUND|PHYS_FOREGROUND) &&
1456       dl->state <= DATALINK_READY)
1457     datalink_Up(dl, 1, 1);
1458   return 1;
1459 }
1460
1461 int
1462 datalink_GetDialTimeout(struct datalink *dl)
1463 {
1464   int result = dl->cfg.dial.timeout + dl->dial.incs * dl->cfg.dial.inc;
1465
1466   if (dl->dial.incs < dl->cfg.dial.maxinc)
1467     dl->dial.incs++;
1468
1469   return result;
1470 }