usr.sbin/ppp/physical.c

   1 /*
   2  * Written by Eivind Eklund <eivind@yes.no>
   3  *    for Yes Interactive
   4  *
   5  * Copyright (C) 1998, Yes Interactive.  All rights reserved.
   6  *
   7  * Redistribution and use in any form is permitted.  Redistribution in
   8  * source form should include the above copyright and this set of
   9  * conditions, because large sections american law seems to have been
  10  * created by a bunch of jerks on drugs that are now illegal, forcing
  11  * me to include this copyright-stuff instead of placing this in the
  12  * public domain.  The name of of 'Yes Interactive' or 'Eivind Eklund'
  13  * may not be used to endorse or promote products derived from this
  14  * software without specific prior written permission.
  15  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  17  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  18  *
  19  * $FreeBSD: src/usr.sbin/ppp/physical.c,v 1.34.2.8 2002/09/01 02:12:29 brian Exp $
  20  * $DragonFly: src/usr.sbin/ppp/physical.c,v 1.3 2005/11/24 23:42:54 swildner Exp $
  21  *
  22  */
  23
  24 #include <sys/param.h>
  25 #include <netinet/in.h>
  26 #include <netinet/in_systm.h>
  27 #include <netinet/ip.h>
  28 #include <sys/socket.h>
  29 #include <sys/un.h>
  30
  31 #include <errno.h>
  32 #include <fcntl.h>
  33 #include <paths.h>
  34 #include <stdarg.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <sys/tty.h>    /* TIOCOUTQ */
  39 #include <sys/uio.h>
  40 #include <time.h>
  41 #include <unistd.h>
  42 #include <utmp.h>
  43 #if defined(__OpenBSD__) || defined(__NetBSD__)
  44 #include <sys/ioctl.h>
  45 #include <util.h>
  46 #else
  47 #include <libutil.h>
  48 #endif
  49
  50 #include "layer.h"
  51 #ifndef NONAT
  52 #include "nat_cmd.h"
  53 #endif
  54 #include "proto.h"
  55 #include "acf.h"
  56 #include "vjcomp.h"
  57 #include "defs.h"
  58 #include "command.h"
  59 #include "mbuf.h"
  60 #include "log.h"
  61 #include "id.h"
  62 #include "timer.h"
  63 #include "fsm.h"
  64 #include "lqr.h"
  65 #include "hdlc.h"
  66 #include "lcp.h"
  67 #include "throughput.h"
  68 #include "sync.h"
  69 #include "async.h"
  70 #include "iplist.h"
  71 #include "slcompress.h"
  72 #include "ncpaddr.h"
  73 #include "ipcp.h"
  74 #include "filter.h"
  75 #include "descriptor.h"
  76 #include "ccp.h"
  77 #include "link.h"
  78 #include "physical.h"
  79 #include "mp.h"
  80 #ifndef NORADIUS
  81 #include "radius.h"
  82 #endif
  83 #include "ipv6cp.h"
  84 #include "ncp.h"
  85 #include "bundle.h"
  86 #include "prompt.h"
  87 #include "chat.h"
  88 #include "auth.h"
  89 #include "chap.h"
  90 #include "cbcp.h"
  91 #include "datalink.h"
  92 #include "tcp.h"
  93 #include "udp.h"
  94 #include "exec.h"
  95 #include "tty.h"
  96 #ifndef NOI4B
  97 #include "i4b.h"
  98 #endif
  99 #ifndef NONETGRAPH
 100 #include "ether.h"
 101 #include "netgraph.h"
 102 #endif
 103 #ifndef NOATM
 104 #include "atm.h"
 105 #endif
 106 #include "tcpmss.h"
 107
 108 #define PPPOTCPLINE "ppp"
 109
 110 static int physical_DescriptorWrite(struct fdescriptor *, struct bundle *,
 111                                     const fd_set *);
 112
 113 static int
 114 physical_DeviceSize(void)
 115 {
 116   return sizeof(struct device);
 117 }
 118
 119 struct {
 120   struct device *(*create)(struct physical *);
 121   struct device *(*iov2device)(int, struct physical *, struct iovec *,
 122                                int *, int, int *, int *);
 123   int (*DeviceSize)(void);
 124 } devices[] = {
 125 #ifndef NOI4B
 126   /*
 127    * This must come before ``tty'' so that the probe routine is
 128    * able to identify it as a more specific type of terminal device.
 129    */
 130   { i4b_Create, i4b_iov2device, i4b_DeviceSize },
 131 #endif
 132   { tty_Create, tty_iov2device, tty_DeviceSize },
 133 #ifndef NONETGRAPH
 134   /*
 135    * This must come before ``udp'' so that the probe routine is
 136    * able to identify it as a more specific type of SOCK_DGRAM.
 137    */
 138   { ether_Create, ether_iov2device, ether_DeviceSize },
 139 #ifdef EXPERIMENTAL_NETGRAPH
 140   { ng_Create, ng_iov2device, ng_DeviceSize },
 141 #endif
 142 #endif
 143 #ifndef NOATM
 144   /* Ditto for ATM devices */
 145   { atm_Create, atm_iov2device, atm_DeviceSize },
 146 #endif
 147   { tcp_Create, tcp_iov2device, tcp_DeviceSize },
 148   { udp_Create, udp_iov2device, udp_DeviceSize },
 149   { exec_Create, exec_iov2device, exec_DeviceSize }
 150 };
 151
 152 #define NDEVICES (sizeof devices / sizeof devices[0])
 153
 154 static int
 155 physical_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
 156                    int *n)
 157 {
 158   return physical_doUpdateSet(d, r, w, e, n, 0);
 159 }
 160
 161 void
 162 physical_SetDescriptor(struct physical *p)
 163 {
 164   p->desc.type = PHYSICAL_DESCRIPTOR;
 165   p->desc.UpdateSet = physical_UpdateSet;
 166   p->desc.IsSet = physical_IsSet;
 167   p->desc.Read = physical_DescriptorRead;
 168   p->desc.Write = physical_DescriptorWrite;
 169 }
 170
 171 struct physical *
 172 physical_Create(struct datalink *dl, int type)
 173 {
 174   struct physical *p;
 175
 176   p = (struct physical *)malloc(sizeof(struct physical));
 177   if (!p)
 178     return NULL;
 179
 180   p->link.type = PHYSICAL_LINK;
 181   p->link.name = dl->name;
 182   p->link.len = sizeof *p;
 183
 184   /* The sample period is fixed - see physical2iov() & iov2physical() */
 185   throughput_init(&p->link.stats.total, SAMPLE_PERIOD);
 186   p->link.stats.parent = dl->bundle->ncp.mp.active ?
 187     &dl->bundle->ncp.mp.link.stats.total : NULL;
 188   p->link.stats.gather = 1;
 189
 190   memset(p->link.Queue, '\0', sizeof p->link.Queue);
 191   memset(p->link.proto_in, '\0', sizeof p->link.proto_in);
 192   memset(p->link.proto_out, '\0', sizeof p->link.proto_out);
 193   link_EmptyStack(&p->link);
 194
 195   p->handler = NULL;
 196   physical_SetDescriptor(p);
 197   p->type = type;
 198
 199   hdlc_Init(&p->hdlc, &p->link.lcp);
 200   async_Init(&p->async);
 201
 202   p->fd = -1;
 203   p->out = NULL;
 204   p->connect_count = 0;
 205   p->dl = dl;
 206   p->input.sz = 0;
 207   *p->name.full = '\0';
 208   p->name.base = p->name.full;
 209
 210   p->Utmp = 0;
 211   p->session_owner = (pid_t)-1;
 212
 213   p->cfg.rts_cts = MODEM_CTSRTS;
 214   p->cfg.speed = MODEM_SPEED;
 215   p->cfg.parity = CS8;
 216   memcpy(p->cfg.devlist, MODEM_LIST, sizeof MODEM_LIST);
 217   p->cfg.ndev = NMODEMS;
 218   p->cfg.cd.necessity = CD_DEFAULT;
 219   p->cfg.cd.delay = 0;          /* reconfigured or device specific default */
 220
 221   lcp_Init(&p->link.lcp, dl->bundle, &p->link, &dl->fsmp);
 222   ccp_Init(&p->link.ccp, dl->bundle, &p->link, &dl->fsmp);
 223
 224   return p;
 225 }
 226
 227 static const struct parity {
 228   const char *name;
 229   const char *name1;
 230   int set;
 231 } validparity[] = {
 232   { "even", "P_EVEN", CS7 | PARENB },
 233   { "odd", "P_ODD", CS7 | PARENB | PARODD },
 234   { "none", "P_ZERO", CS8 },
 235   { NULL, 0 },
 236 };
 237
 238 static int
 239 GetParityValue(const char *str)
 240 {
 241   const struct parity *pp;
 242
 243   for (pp = validparity; pp->name; pp++) {
 244     if (strcasecmp(pp->name, str) == 0 ||
 245         strcasecmp(pp->name1, str) == 0) {
 246       return pp->set;
 247     }
 248   }
 249   return (-1);
 250 }
 251
 252 int
 253 physical_SetParity(struct physical *p, const char *str)
 254 {
 255   struct termios rstio;
 256   int val;
 257
 258   val = GetParityValue(str);
 259   if (val > 0) {
 260     p->cfg.parity = val;
 261     if (p->fd >= 0) {
 262       tcgetattr(p->fd, &rstio);
 263       rstio.c_cflag &= ~(CSIZE | PARODD | PARENB);
 264       rstio.c_cflag |= val;
 265       tcsetattr(p->fd, TCSADRAIN, &rstio);
 266     }
 267     return 0;
 268   }
 269   log_Printf(LogWARN, "%s: %s: Invalid parity\n", p->link.name, str);
 270   return -1;
 271 }
 272
 273 int
 274 physical_GetSpeed(struct physical *p)
 275 {
 276   if (p->handler && p->handler->speed)
 277     return (*p->handler->speed)(p);
 278
 279   return 0;
 280 }
 281
 282 int
 283 physical_SetSpeed(struct physical *p, int speed)
 284 {
 285   if (IntToSpeed(speed) != B0) {
 286       p->cfg.speed = speed;
 287       return 1;
 288   }
 289
 290   return 0;
 291 }
 292
 293 int
 294 physical_Raw(struct physical *p)
 295 {
 296   if (p->handler && p->handler->raw)
 297     return (*p->handler->raw)(p);
 298
 299   return 1;
 300 }
 301
 302 void
 303 physical_Offline(struct physical *p)
 304 {
 305   if (p->handler && p->handler->offline)
 306     (*p->handler->offline)(p);
 307   log_Printf(LogPHASE, "%s: Disconnected!\n", p->link.name);
 308 }
 309
 310 static int
 311 physical_Lock(struct physical *p)
 312 {
 313   int res;
 314
 315   if (*p->name.full == '/' && p->type != PHYS_DIRECT &&
 316       (res = ID0uu_lock(p->name.base)) != UU_LOCK_OK) {
 317     if (res == UU_LOCK_INUSE)
 318       log_Printf(LogPHASE, "%s: %s is in use\n", p->link.name, p->name.full);
 319     else
 320       log_Printf(LogPHASE, "%s: %s is in use: uu_lock: %s\n",
 321                  p->link.name, p->name.full, uu_lockerr(res));
 322     return 0;
 323   }
 324
 325   return 1;
 326 }
 327
 328 static void
 329 physical_Unlock(struct physical *p)
 330 {
 331   if (*p->name.full == '/' && p->type != PHYS_DIRECT &&
 332       ID0uu_unlock(p->name.base) == -1)
 333     log_Printf(LogALERT, "%s: Can't uu_unlock %s\n", p->link.name,
 334                p->name.base);
 335 }
 336
 337 void
 338 physical_Close(struct physical *p)
 339 {
 340   int newsid;
 341   char fn[PATH_MAX];
 342
 343   if (p->fd < 0)
 344     return;
 345
 346   log_Printf(LogDEBUG, "%s: Close\n", p->link.name);
 347
 348   if (p->handler && p->handler->cooked)
 349     (*p->handler->cooked)(p);
 350
 351   physical_StopDeviceTimer(p);
 352   if (p->Utmp) {
 353     if (p->handler && (p->handler->type == TCP_DEVICE ||
 354                        p->handler->type == UDP_DEVICE))
 355       /* Careful - we logged in on line ``ppp'' with IP as our host */
 356       ID0logout(PPPOTCPLINE, 1);
 357     else
 358       ID0logout(p->name.base, 0);
 359     p->Utmp = 0;
 360   }
 361   newsid = tcgetpgrp(p->fd) == getpgrp();
 362   close(p->fd);
 363   p->fd = -1;
 364   log_SetTtyCommandMode(p->dl);
 365
 366   throughput_stop(&p->link.stats.total);
 367   throughput_log(&p->link.stats.total, LogPHASE, p->link.name);
 368
 369   if (p->session_owner != (pid_t)-1) {
 370     log_Printf(LogPHASE, "%s: HUPing %ld\n", p->link.name,
 371                (long)p->session_owner);
 372     ID0kill(p->session_owner, SIGHUP);
 373     p->session_owner = (pid_t)-1;
 374   }
 375
 376   if (newsid)
 377     bundle_setsid(p->dl->bundle, 0);
 378
 379   if (*p->name.full == '/') {
 380     snprintf(fn, sizeof fn, "%s%s.if", _PATH_VARRUN, p->name.base);
 381 #ifndef RELEASE_CRUNCH
 382     if (ID0unlink(fn) == -1)
 383       log_Printf(LogALERT, "%s: Can't remove %s: %s\n",
 384                  p->link.name, fn, strerror(errno));
 385 #else
 386     ID0unlink(fn);
 387 #endif
 388   }
 389   physical_Unlock(p);
 390   if (p->handler && p->handler->destroy)
 391     (*p->handler->destroy)(p);
 392   p->handler = NULL;
 393   p->name.base = p->name.full;
 394   *p->name.full = '\0';
 395 }
 396
 397 void
 398 physical_Destroy(struct physical *p)
 399 {
 400   physical_Close(p);
 401   throughput_destroy(&p->link.stats.total);
 402   free(p);
 403 }
 404
 405 static int
 406 physical_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle,
 407                          const fd_set *fdset)
 408 {
 409   struct physical *p = descriptor2physical(d);
 410   int nw, result = 0;
 411
 412   if (p->out == NULL)
 413     p->out = link_Dequeue(&p->link);
 414
 415   if (p->out) {
 416     nw = physical_Write(p, MBUF_CTOP(p->out), p->out->m_len);
 417     log_Printf(LogDEBUG, "%s: DescriptorWrite: wrote %d(%lu) to %d\n",
 418                p->link.name, nw, (unsigned long)p->out->m_len, p->fd);
 419     if (nw > 0) {
 420       p->out->m_len -= nw;
 421       p->out->m_offset += nw;
 422       if (p->out->m_len == 0)
 423         p->out = m_free(p->out);
 424       result = 1;
 425     } else if (nw < 0) {
 426       if (errno == EAGAIN)
 427         result = 1;
 428       else if (errno != ENOBUFS) {
 429         log_Printf(LogPHASE, "%s: write (%d): %s\n", p->link.name,
 430                    p->fd, strerror(errno));
 431         datalink_Down(p->dl, CLOSE_NORMAL);
 432       }
 433     }
 434     /* else we shouldn't really have been called !  select() is broken ! */
 435   }
 436
 437   return result;
 438 }
 439
 440 int
 441 physical_ShowStatus(struct cmdargs const *arg)
 442 {
 443   struct physical *p = arg->cx->physical;
 444   struct cd *cd;
 445   const char *dev;
 446   int n, slot;
 447
 448   prompt_Printf(arg->prompt, "Name: %s\n", p->link.name);
 449   prompt_Printf(arg->prompt, " State:           ");
 450   if (p->fd < 0)
 451     prompt_Printf(arg->prompt, "closed\n");
 452   else {
 453     slot = physical_Slot(p);
 454     if (p->handler && p->handler->openinfo) {
 455       if (slot == -1)
 456         prompt_Printf(arg->prompt, "open (%s)\n", (*p->handler->openinfo)(p));
 457       else
 458         prompt_Printf(arg->prompt, "open (%s, port %d)\n",
 459                       (*p->handler->openinfo)(p), slot);
 460     } else if (slot == -1)
 461       prompt_Printf(arg->prompt, "open\n");
 462     else
 463       prompt_Printf(arg->prompt, "open (port %d)\n", slot);
 464   }
 465
 466   prompt_Printf(arg->prompt, " Device:          %s",
 467                 *p->name.full ?  p->name.full :
 468                 p->type == PHYS_DIRECT ? "unknown" : "N/A");
 469   if (p->session_owner != (pid_t)-1)
 470     prompt_Printf(arg->prompt, " (session owner: %ld)", (long)p->session_owner);
 471
 472   prompt_Printf(arg->prompt, "\n Link Type:       %s\n", mode2Nam(p->type));
 473   prompt_Printf(arg->prompt, " Connect Count:   %d\n", p->connect_count);
 474 #ifdef TIOCOUTQ
 475   if (p->fd >= 0 && ioctl(p->fd, TIOCOUTQ, &n) >= 0)
 476       prompt_Printf(arg->prompt, " Physical outq:   %d\n", n);
 477 #endif
 478
 479   prompt_Printf(arg->prompt, " Queued Packets:  %lu\n",
 480                 (u_long)link_QueueLen(&p->link));
 481   prompt_Printf(arg->prompt, " Phone Number:    %s\n", arg->cx->phone.chosen);
 482
 483   prompt_Printf(arg->prompt, "\nDefaults:\n");
 484
 485   prompt_Printf(arg->prompt, " Device List:     ");
 486   dev = p->cfg.devlist;
 487   for (n = 0; n < p->cfg.ndev; n++) {
 488     if (n)
 489       prompt_Printf(arg->prompt, ", ");
 490     prompt_Printf(arg->prompt, "\"%s\"", dev);
 491     dev += strlen(dev) + 1;
 492   }
 493
 494   prompt_Printf(arg->prompt, "\n Characteristics: ");
 495   if (physical_IsSync(arg->cx->physical))
 496     prompt_Printf(arg->prompt, "sync");
 497   else
 498     prompt_Printf(arg->prompt, "%dbps", p->cfg.speed);
 499
 500   switch (p->cfg.parity & CSIZE) {
 501   case CS7:
 502     prompt_Printf(arg->prompt, ", cs7");
 503     break;
 504   case CS8:
 505     prompt_Printf(arg->prompt, ", cs8");
 506     break;
 507   }
 508   if (p->cfg.parity & PARENB) {
 509     if (p->cfg.parity & PARODD)
 510       prompt_Printf(arg->prompt, ", odd parity");
 511     else
 512       prompt_Printf(arg->prompt, ", even parity");
 513   } else
 514     prompt_Printf(arg->prompt, ", no parity");
 515
 516   prompt_Printf(arg->prompt, ", CTS/RTS %s\n", (p->cfg.rts_cts ? "on" : "off"));
 517
 518   prompt_Printf(arg->prompt, " CD check delay:  ");
 519   cd = p->handler ? &p->handler->cd : &p->cfg.cd;
 520   if (cd->necessity == CD_NOTREQUIRED)
 521     prompt_Printf(arg->prompt, "no cd");
 522   else if (p->cfg.cd.necessity == CD_DEFAULT) {
 523     prompt_Printf(arg->prompt, "device specific");
 524   } else {
 525     prompt_Printf(arg->prompt, "%d second%s", p->cfg.cd.delay,
 526                   p->cfg.cd.delay == 1 ? "" : "s");
 527     if (p->cfg.cd.necessity == CD_REQUIRED)
 528       prompt_Printf(arg->prompt, " (required!)");
 529   }
 530   prompt_Printf(arg->prompt, "\n\n");
 531
 532   throughput_disp(&p->link.stats.total, arg->prompt);
 533
 534   return 0;
 535 }
 536
 537 void
 538 physical_DescriptorRead(struct fdescriptor *d, struct bundle *bundle,
 539                         const fd_set *fdset)
 540 {
 541   struct physical *p = descriptor2physical(d);
 542   u_char *rbuff;
 543   int n, found;
 544
 545   rbuff = p->input.buf + p->input.sz;
 546
 547   /* something to read */
 548   n = physical_Read(p, rbuff, sizeof p->input.buf - p->input.sz);
 549   log_Printf(LogDEBUG, "%s: DescriptorRead: read %d/%d from %d\n",
 550              p->link.name, n, (int)(sizeof p->input.buf - p->input.sz), p->fd);
 551   if (n <= 0) {
 552     if (n < 0)
 553       log_Printf(LogPHASE, "%s: read (%d): %s\n", p->link.name, p->fd,
 554                  strerror(errno));
 555     else
 556       log_Printf(LogPHASE, "%s: read (%d): Got zero bytes\n",
 557                  p->link.name, p->fd);
 558     datalink_Down(p->dl, CLOSE_NORMAL);
 559     return;
 560   }
 561
 562   rbuff -= p->input.sz;
 563   n += p->input.sz;
 564
 565   if (p->link.lcp.fsm.state <= ST_CLOSED) {
 566     if (p->type != PHYS_DEDICATED) {
 567       found = hdlc_Detect((u_char const **)&rbuff, n, physical_IsSync(p));
 568       if (rbuff != p->input.buf)
 569         log_WritePrompts(p->dl, "%.*s", (int)(rbuff - p->input.buf),
 570                          p->input.buf);
 571       p->input.sz = n - (rbuff - p->input.buf);
 572
 573       if (found) {
 574         /* LCP packet is detected. Turn ourselves into packet mode */
 575         log_Printf(LogPHASE, "%s: PPP packet detected, coming up\n",
 576                    p->link.name);
 577         log_SetTtyCommandMode(p->dl);
 578         datalink_Up(p->dl, 0, 1);
 579         link_PullPacket(&p->link, rbuff, p->input.sz, bundle);
 580         p->input.sz = 0;
 581       } else
 582         bcopy(rbuff, p->input.buf, p->input.sz);
 583     } else
 584       /* In -dedicated mode, we just discard input until LCP is started */
 585       p->input.sz = 0;
 586   } else if (n > 0)
 587     link_PullPacket(&p->link, rbuff, n, bundle);
 588 }
 589
 590 struct physical *
 591 iov2physical(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
 592              int fd, int *auxfd, int *nauxfd)
 593 {
 594   struct physical *p;
 595   int len, h, type;
 596
 597   p = (struct physical *)iov[(*niov)++].iov_base;
 598   p->link.name = dl->name;
 599   memset(p->link.Queue, '\0', sizeof p->link.Queue);
 600
 601   p->desc.UpdateSet = physical_UpdateSet;
 602   p->desc.IsSet = physical_IsSet;
 603   p->desc.Read = physical_DescriptorRead;
 604   p->desc.Write = physical_DescriptorWrite;
 605   p->type = PHYS_DIRECT;
 606   p->dl = dl;
 607   len = strlen(_PATH_DEV);
 608   p->out = NULL;
 609   p->connect_count = 1;
 610
 611   physical_SetDevice(p, p->name.full);
 612
 613   p->link.lcp.fsm.bundle = dl->bundle;
 614   p->link.lcp.fsm.link = &p->link;
 615   memset(&p->link.lcp.fsm.FsmTimer, '\0', sizeof p->link.lcp.fsm.FsmTimer);
 616   memset(&p->link.lcp.fsm.OpenTimer, '\0', sizeof p->link.lcp.fsm.OpenTimer);
 617   memset(&p->link.lcp.fsm.StoppedTimer, '\0',
 618          sizeof p->link.lcp.fsm.StoppedTimer);
 619   p->link.lcp.fsm.parent = &dl->fsmp;
 620   lcp_SetupCallbacks(&p->link.lcp);
 621
 622   p->link.ccp.fsm.bundle = dl->bundle;
 623   p->link.ccp.fsm.link = &p->link;
 624   /* Our in.state & out.state are NULL (no link-level ccp yet) */
 625   memset(&p->link.ccp.fsm.FsmTimer, '\0', sizeof p->link.ccp.fsm.FsmTimer);
 626   memset(&p->link.ccp.fsm.OpenTimer, '\0', sizeof p->link.ccp.fsm.OpenTimer);
 627   memset(&p->link.ccp.fsm.StoppedTimer, '\0',
 628          sizeof p->link.ccp.fsm.StoppedTimer);
 629   p->link.ccp.fsm.parent = &dl->fsmp;
 630   ccp_SetupCallbacks(&p->link.ccp);
 631
 632   p->hdlc.lqm.owner = &p->link.lcp;
 633   p->hdlc.ReportTimer.state = TIMER_STOPPED;
 634   p->hdlc.lqm.timer.state = TIMER_STOPPED;
 635
 636   p->fd = fd;
 637   p->link.stats.total.in.SampleOctets = (long long *)iov[(*niov)++].iov_base;
 638   p->link.stats.total.out.SampleOctets = (long long *)iov[(*niov)++].iov_base;
 639   p->link.stats.parent = dl->bundle->ncp.mp.active ?
 640     &dl->bundle->ncp.mp.link.stats.total : NULL;
 641   p->link.stats.gather = 1;
 642
 643   type = (long)p->handler;
 644   p->handler = NULL;
 645   for (h = 0; h < NDEVICES && p->handler == NULL; h++)
 646     p->handler = (*devices[h].iov2device)(type, p, iov, niov, maxiov,
 647                                           auxfd, nauxfd);
 648   if (p->handler == NULL) {
 649     log_Printf(LogPHASE, "%s: Unknown link type\n", p->link.name);
 650     free(iov[(*niov)++].iov_base);
 651     physical_SetupStack(p, "unknown", PHYSICAL_NOFORCE);
 652   } else
 653     log_Printf(LogPHASE, "%s: Device %s, link type is %s\n",
 654                p->link.name, p->name.full, p->handler->name);
 655
 656   if (p->hdlc.lqm.method && p->hdlc.lqm.timer.load)
 657     lqr_reStart(&p->link.lcp);
 658   hdlc_StartTimer(&p->hdlc);
 659
 660   throughput_restart(&p->link.stats.total, "physical throughput",
 661                      Enabled(dl->bundle, OPT_THROUGHPUT));
 662
 663   return p;
 664 }
 665
 666 int
 667 physical_MaxDeviceSize(void)
 668 {
 669   int biggest, sz, n;
 670
 671   biggest = sizeof(struct device);
 672   for (sz = n = 0; n < NDEVICES; n++)
 673     if (devices[n].DeviceSize) {
 674       sz = (*devices[n].DeviceSize)();
 675       if (biggest < sz)
 676         biggest = sz;
 677     }
 678
 679   return biggest;
 680 }
 681
 682 int
 683 physical2iov(struct physical *p, struct iovec *iov, int *niov, int maxiov,
 684              int *auxfd, int *nauxfd)
 685 {
 686   struct device *h;
 687   int sz;
 688
 689   h = NULL;
 690   if (p) {
 691     hdlc_StopTimer(&p->hdlc);
 692     lqr_StopTimer(p);
 693     timer_Stop(&p->link.lcp.fsm.FsmTimer);
 694     timer_Stop(&p->link.ccp.fsm.FsmTimer);
 695     timer_Stop(&p->link.lcp.fsm.OpenTimer);
 696     timer_Stop(&p->link.ccp.fsm.OpenTimer);
 697     timer_Stop(&p->link.lcp.fsm.StoppedTimer);
 698     timer_Stop(&p->link.ccp.fsm.StoppedTimer);
 699     if (p->handler) {
 700       h = p->handler;
 701       p->handler = (struct device *)(long)p->handler->type;
 702     }
 703
 704     if (Enabled(p->dl->bundle, OPT_KEEPSESSION) ||
 705         tcgetpgrp(p->fd) == getpgrp())
 706       p->session_owner = getpid();      /* So I'll eventually get HUP'd */
 707     else
 708       p->session_owner = (pid_t)-1;
 709     timer_Stop(&p->link.stats.total.Timer);
 710   }
 711
 712   if (*niov + 2 >= maxiov) {
 713     log_Printf(LogERROR, "physical2iov: No room for physical + throughput"
 714                " + device !\n");
 715     if (p)
 716       free(p);
 717     return -1;
 718   }
 719
 720   iov[*niov].iov_base = (void *)p;
 721   iov[*niov].iov_len = sizeof *p;
 722   (*niov)++;
 723
 724   iov[*niov].iov_base = p ? (void *)p->link.stats.total.in.SampleOctets : NULL;
 725   iov[*niov].iov_len = SAMPLE_PERIOD * sizeof(long long);
 726   (*niov)++;
 727   iov[*niov].iov_base = p ? (void *)p->link.stats.total.out.SampleOctets : NULL;
 728   iov[*niov].iov_len = SAMPLE_PERIOD * sizeof(long long);
 729   (*niov)++;
 730
 731   sz = physical_MaxDeviceSize();
 732   if (p) {
 733     if (h && h->device2iov)
 734       (*h->device2iov)(h, iov, niov, maxiov, auxfd, nauxfd);
 735     else {
 736       iov[*niov].iov_base = malloc(sz);
 737       if (h)
 738         memcpy(iov[*niov].iov_base, h, sizeof *h);
 739       iov[*niov].iov_len = sz;
 740       (*niov)++;
 741     }
 742   } else {
 743     iov[*niov].iov_base = NULL;
 744     iov[*niov].iov_len = sz;
 745     (*niov)++;
 746   }
 747
 748   return p ? p->fd : 0;
 749 }
 750
 751 const char *
 752 physical_LockedDevice(struct physical *p)
 753 {
 754   if (p->fd >= 0 && *p->name.full == '/' && p->type != PHYS_DIRECT)
 755     return p->name.base;
 756
 757   return NULL;
 758 }
 759
 760 void
 761 physical_ChangedPid(struct physical *p, pid_t newpid)
 762 {
 763   if (physical_LockedDevice(p)) {
 764     int res;
 765
 766     if ((res = ID0uu_lock_txfr(p->name.base, newpid)) != UU_LOCK_OK)
 767       log_Printf(LogPHASE, "uu_lock_txfr: %s\n", uu_lockerr(res));
 768   }
 769 }
 770
 771 int
 772 physical_IsSync(struct physical *p)
 773 {
 774    return p->cfg.speed == 0;
 775 }
 776
 777 u_short
 778 physical_DeviceMTU(struct physical *p)
 779 {
 780   return p->handler ? p->handler->mtu : 0;
 781 }
 782
 783 const char *
 784 physical_GetDevice(struct physical *p)
 785 {
 786    return p->name.full;
 787 }
 788
 789 void
 790 physical_SetDeviceList(struct physical *p, int argc, const char *const *argv)
 791 {
 792   int f, pos;
 793
 794   p->cfg.devlist[sizeof p->cfg.devlist - 1] = '\0';
 795   for (f = 0, pos = 0; f < argc && pos < sizeof p->cfg.devlist - 1; f++) {
 796     if (pos)
 797       p->cfg.devlist[pos++] = '\0';
 798     strncpy(p->cfg.devlist + pos, argv[f], sizeof p->cfg.devlist - pos - 1);
 799     pos += strlen(p->cfg.devlist + pos);
 800   }
 801   p->cfg.ndev = f;
 802 }
 803
 804 void
 805 physical_SetSync(struct physical *p)
 806 {
 807    p->cfg.speed = 0;
 808 }
 809
 810 int
 811 physical_SetRtsCts(struct physical *p, int enable)
 812 {
 813    p->cfg.rts_cts = enable ? 1 : 0;
 814    return 1;
 815 }
 816
 817 ssize_t
 818 physical_Read(struct physical *p, void *buf, size_t nbytes)
 819 {
 820   ssize_t ret;
 821
 822   if (p->handler && p->handler->read)
 823     ret = (*p->handler->read)(p, buf, nbytes);
 824   else
 825     ret = read(p->fd, buf, nbytes);
 826
 827   log_DumpBuff(LogPHYSICAL, "read", buf, ret);
 828
 829   return ret;
 830 }
 831
 832 ssize_t
 833 physical_Write(struct physical *p, const void *buf, size_t nbytes)
 834 {
 835   log_DumpBuff(LogPHYSICAL, "write", buf, nbytes);
 836
 837   if (p->handler && p->handler->write)
 838     return (*p->handler->write)(p, buf, nbytes);
 839
 840   return write(p->fd, buf, nbytes);
 841 }
 842
 843 int
 844 physical_doUpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
 845                      int *n, int force)
 846 {
 847   struct physical *p = descriptor2physical(d);
 848   int sets;
 849
 850   sets = 0;
 851   if (p->fd >= 0) {
 852     if (r) {
 853       FD_SET(p->fd, r);
 854       log_Printf(LogTIMER, "%s: fdset(r) %d\n", p->link.name, p->fd);
 855       sets++;
 856     }
 857     if (e) {
 858       FD_SET(p->fd, e);
 859       log_Printf(LogTIMER, "%s: fdset(e) %d\n", p->link.name, p->fd);
 860       sets++;
 861     }
 862     if (w && (force || link_QueueLen(&p->link) || p->out)) {
 863       FD_SET(p->fd, w);
 864       log_Printf(LogTIMER, "%s: fdset(w) %d\n", p->link.name, p->fd);
 865       sets++;
 866     }
 867     if (sets && *n < p->fd + 1)
 868       *n = p->fd + 1;
 869   }
 870
 871   return sets;
 872 }
 873
 874 int
 875 physical_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e)
 876 {
 877   if (p->handler && p->handler->removefromset)
 878     return (*p->handler->removefromset)(p, r, w, e);
 879   else {
 880     int sets;
 881
 882     sets = 0;
 883     if (p->fd >= 0) {
 884       if (r && FD_ISSET(p->fd, r)) {
 885         FD_CLR(p->fd, r);
 886         log_Printf(LogTIMER, "%s: fdunset(r) %d\n", p->link.name, p->fd);
 887         sets++;
 888       }
 889       if (e && FD_ISSET(p->fd, e)) {
 890         FD_CLR(p->fd, e);
 891         log_Printf(LogTIMER, "%s: fdunset(e) %d\n", p->link.name, p->fd);
 892         sets++;
 893       }
 894       if (w && FD_ISSET(p->fd, w)) {
 895         FD_CLR(p->fd, w);
 896         log_Printf(LogTIMER, "%s: fdunset(w) %d\n", p->link.name, p->fd);
 897         sets++;
 898       }
 899     }
 900
 901     return sets;
 902   }
 903 }
 904
 905 int
 906 physical_IsSet(struct fdescriptor *d, const fd_set *fdset)
 907 {
 908   struct physical *p = descriptor2physical(d);
 909   return p->fd >= 0 && FD_ISSET(p->fd, fdset);
 910 }
 911
 912 void
 913 physical_Login(struct physical *p, const char *name)
 914 {
 915   if (p->type == PHYS_DIRECT && *p->name.base && !p->Utmp) {
 916     struct utmp ut;
 917     const char *connstr;
 918     char *colon;
 919
 920     memset(&ut, 0, sizeof ut);
 921     time(&ut.ut_time);
 922     strncpy(ut.ut_name, name, sizeof ut.ut_name);
 923     if (p->handler && (p->handler->type == TCP_DEVICE ||
 924                        p->handler->type == UDP_DEVICE)) {
 925       strncpy(ut.ut_line, PPPOTCPLINE, sizeof ut.ut_line);
 926       strncpy(ut.ut_host, p->name.base, sizeof ut.ut_host);
 927       colon = memchr(ut.ut_host, ':', sizeof ut.ut_host);
 928       if (colon)
 929         *colon = '\0';
 930     } else
 931       strncpy(ut.ut_line, p->name.base, sizeof ut.ut_line);
 932     if ((connstr = getenv("CONNECT")))
 933       /* mgetty sets this to the connection speed */
 934       strncpy(ut.ut_host, connstr, sizeof ut.ut_host);
 935     ID0login(&ut);
 936     p->Utmp = ut.ut_time;
 937   }
 938 }
 939
 940 int
 941 physical_SetMode(struct physical *p, int mode)
 942 {
 943   if ((p->type & (PHYS_DIRECT|PHYS_DEDICATED) ||
 944        mode & (PHYS_DIRECT|PHYS_DEDICATED)) &&
 945       (!(p->type & PHYS_DIRECT) || !(mode & PHYS_BACKGROUND))) {
 946     /* Note:  The -direct -> -background is for callback ! */
 947     log_Printf(LogWARN, "%s: Cannot change mode %s to %s\n", p->link.name,
 948                mode2Nam(p->type), mode2Nam(mode));
 949     return 0;
 950   }
 951   p->type = mode;
 952   return 1;
 953 }
 954
 955 void
 956 physical_DeleteQueue(struct physical *p)
 957 {
 958   if (p->out) {
 959     m_freem(p->out);
 960     p->out = NULL;
 961   }
 962   link_DeleteQueue(&p->link);
 963 }
 964
 965 void
 966 physical_SetDevice(struct physical *p, const char *name)
 967 {
 968   int len = strlen(_PATH_DEV);
 969
 970   if (name != p->name.full) {
 971     strncpy(p->name.full, name, sizeof p->name.full - 1);
 972     p->name.full[sizeof p->name.full - 1] = '\0';
 973   }
 974   p->name.base = *p->name.full == '!' ?  p->name.full + 1 :
 975                  strncmp(p->name.full, _PATH_DEV, len) ?
 976                  p->name.full : p->name.full + len;
 977 }
 978
 979 static void
 980 physical_Found(struct physical *p)
 981 {
 982   FILE *lockfile;
 983   char fn[PATH_MAX];
 984
 985   if (*p->name.full == '/') {
 986     snprintf(fn, sizeof fn, "%s%s.if", _PATH_VARRUN, p->name.base);
 987     lockfile = ID0fopen(fn, "w");
 988     if (lockfile != NULL) {
 989       fprintf(lockfile, "%s%d\n", TUN_NAME, p->dl->bundle->unit);
 990       fclose(lockfile);
 991     }
 992 #ifndef RELEASE_CRUNCH
 993     else
 994       log_Printf(LogALERT, "%s: Can't create %s: %s\n",
 995                  p->link.name, fn, strerror(errno));
 996 #endif
 997   }
 998
 999   throughput_start(&p->link.stats.total, "physical throughput",
1000                    Enabled(p->dl->bundle, OPT_THROUGHPUT));
1001   p->connect_count++;
1002   p->input.sz = 0;
1003
1004   log_Printf(LogPHASE, "%s: Connected!\n", p->link.name);
1005 }
1006
1007 int
1008 physical_Open(struct physical *p, struct bundle *bundle)
1009 {
1010   int devno, h, wasfd, err;
1011   char *dev;
1012
1013   if (p->fd >= 0)
1014     log_Printf(LogDEBUG, "%s: Open: Modem is already open!\n", p->link.name);
1015     /* We're going back into "term" mode */
1016   else if (p->type == PHYS_DIRECT) {
1017     physical_SetDevice(p, "");
1018     p->fd = STDIN_FILENO;
1019     for (h = 0; h < NDEVICES && p->handler == NULL && p->fd >= 0; h++)
1020       p->handler = (*devices[h].create)(p);
1021     if (p->fd >= 0) {
1022       if (p->handler == NULL) {
1023         physical_SetupStack(p, "unknown", PHYSICAL_NOFORCE);
1024         log_Printf(LogDEBUG, "%s: stdin is unidentified\n", p->link.name);
1025       }
1026       physical_Found(p);
1027     }
1028   } else {
1029     dev = p->cfg.devlist;
1030     devno = 0;
1031     while (devno < p->cfg.ndev && p->fd < 0) {
1032       physical_SetDevice(p, dev);
1033       if (physical_Lock(p)) {
1034         err = 0;
1035
1036         if (*p->name.full == '/') {
1037           p->fd = ID0open(p->name.full, O_RDWR | O_NONBLOCK);
1038           if (p->fd < 0)
1039             err = errno;
1040         }
1041
1042         wasfd = p->fd;
1043         for (h = 0; h < NDEVICES && p->handler == NULL; h++)
1044           if ((p->handler = (*devices[h].create)(p)) == NULL && wasfd != p->fd)
1045             break;
1046
1047         if (p->fd < 0) {
1048           if (h == NDEVICES) {
1049             if (err)
1050               log_Printf(LogWARN, "%s: %s: %s\n", p->link.name, p->name.full,
1051                          strerror(errno));
1052             else
1053               log_Printf(LogWARN, "%s: Device (%s) must begin with a '/',"
1054                          " a '!' or contain at least one ':'\n", p->link.name,
1055                          p->name.full);
1056           }
1057           physical_Unlock(p);
1058         } else
1059           physical_Found(p);
1060       }
1061       dev += strlen(dev) + 1;
1062       devno++;
1063     }
1064   }
1065
1066   return p->fd;
1067 }
1068
1069 void
1070 physical_SetupStack(struct physical *p, const char *who, int how)
1071 {
1072   link_EmptyStack(&p->link);
1073   if (how == PHYSICAL_FORCE_SYNC || how == PHYSICAL_FORCE_SYNCNOACF ||
1074       (how == PHYSICAL_NOFORCE && physical_IsSync(p)))
1075     link_Stack(&p->link, &synclayer);
1076   else {
1077     link_Stack(&p->link, &asynclayer);
1078     link_Stack(&p->link, &hdlclayer);
1079   }
1080   if (how != PHYSICAL_FORCE_SYNCNOACF)
1081     link_Stack(&p->link, &acflayer);
1082   link_Stack(&p->link, &protolayer);
1083   link_Stack(&p->link, &lqrlayer);
1084   link_Stack(&p->link, &ccplayer);
1085   link_Stack(&p->link, &vjlayer);
1086   link_Stack(&p->link, &tcpmsslayer);
1087 #ifndef NONAT
1088   link_Stack(&p->link, &natlayer);
1089 #endif
1090   if (how == PHYSICAL_FORCE_ASYNC && physical_IsSync(p)) {
1091     log_Printf(LogWARN, "Sync device setting ignored for ``%s'' device\n", who);
1092     p->cfg.speed = MODEM_SPEED;
1093   } else if (how == PHYSICAL_FORCE_SYNC && !physical_IsSync(p)) {
1094     log_Printf(LogWARN, "Async device setting ignored for ``%s'' device\n",
1095                who);
1096     physical_SetSync(p);
1097   }
1098 }
1099
1100 void
1101 physical_StopDeviceTimer(struct physical *p)
1102 {
1103   if (p->handler && p->handler->stoptimer)
1104     (*p->handler->stoptimer)(p);
1105 }
1106
1107 int
1108 physical_AwaitCarrier(struct physical *p)
1109 {
1110   if (p->handler && p->handler->awaitcarrier)
1111     return (*p->handler->awaitcarrier)(p);
1112
1113   return CARRIER_OK;
1114 }
1115
1116
1117 void
1118 physical_SetAsyncParams(struct physical *p, u_int32_t mymap, u_int32_t hismap)
1119 {
1120   if (p->handler && p->handler->setasyncparams)
1121     return (*p->handler->setasyncparams)(p, mymap, hismap);
1122
1123   async_SetLinkParams(&p->async, mymap, hismap);
1124 }
1125
1126 int
1127 physical_Slot(struct physical *p)
1128 {
1129   if (p->handler && p->handler->slot)
1130     return (*p->handler->slot)(p);
1131
1132   return -1;
1133 }