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     if (ID0unlink(fn) == -1)
 382       log_Printf(LogALERT, "%s: Can't remove %s: %s\n",
 383                  p->link.name, fn, strerror(errno));
 384   }
 385   physical_Unlock(p);
 386   if (p->handler && p->handler->destroy)
 387     (*p->handler->destroy)(p);
 388   p->handler = NULL;
 389   p->name.base = p->name.full;
 390   *p->name.full = '\0';
 391 }
 392
 393 void
 394 physical_Destroy(struct physical *p)
 395 {
 396   physical_Close(p);
 397   throughput_destroy(&p->link.stats.total);
 398   free(p);
 399 }
 400
 401 static int
 402 physical_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle,
 403                          const fd_set *fdset)
 404 {
 405   struct physical *p = descriptor2physical(d);
 406   int nw, result = 0;
 407
 408   if (p->out == NULL)
 409     p->out = link_Dequeue(&p->link);
 410
 411   if (p->out) {
 412     nw = physical_Write(p, MBUF_CTOP(p->out), p->out->m_len);
 413     log_Printf(LogDEBUG, "%s: DescriptorWrite: wrote %d(%lu) to %d\n",
 414                p->link.name, nw, (unsigned long)p->out->m_len, p->fd);
 415     if (nw > 0) {
 416       p->out->m_len -= nw;
 417       p->out->m_offset += nw;
 418       if (p->out->m_len == 0)
 419         p->out = m_free(p->out);
 420       result = 1;
 421     } else if (nw < 0) {
 422       if (errno == EAGAIN)
 423         result = 1;
 424       else if (errno != ENOBUFS) {
 425         log_Printf(LogPHASE, "%s: write (%d): %s\n", p->link.name,
 426                    p->fd, strerror(errno));
 427         datalink_Down(p->dl, CLOSE_NORMAL);
 428       }
 429     }
 430     /* else we shouldn't really have been called !  select() is broken ! */
 431   }
 432
 433   return result;
 434 }
 435
 436 int
 437 physical_ShowStatus(struct cmdargs const *arg)
 438 {
 439   struct physical *p = arg->cx->physical;
 440   struct cd *cd;
 441   const char *dev;
 442   int n, slot;
 443
 444   prompt_Printf(arg->prompt, "Name: %s\n", p->link.name);
 445   prompt_Printf(arg->prompt, " State:           ");
 446   if (p->fd < 0)
 447     prompt_Printf(arg->prompt, "closed\n");
 448   else {
 449     slot = physical_Slot(p);
 450     if (p->handler && p->handler->openinfo) {
 451       if (slot == -1)
 452         prompt_Printf(arg->prompt, "open (%s)\n", (*p->handler->openinfo)(p));
 453       else
 454         prompt_Printf(arg->prompt, "open (%s, port %d)\n",
 455                       (*p->handler->openinfo)(p), slot);
 456     } else if (slot == -1)
 457       prompt_Printf(arg->prompt, "open\n");
 458     else
 459       prompt_Printf(arg->prompt, "open (port %d)\n", slot);
 460   }
 461
 462   prompt_Printf(arg->prompt, " Device:          %s",
 463                 *p->name.full ?  p->name.full :
 464                 p->type == PHYS_DIRECT ? "unknown" : "N/A");
 465   if (p->session_owner != (pid_t)-1)
 466     prompt_Printf(arg->prompt, " (session owner: %ld)", (long)p->session_owner);
 467
 468   prompt_Printf(arg->prompt, "\n Link Type:       %s\n", mode2Nam(p->type));
 469   prompt_Printf(arg->prompt, " Connect Count:   %d\n", p->connect_count);
 470 #ifdef TIOCOUTQ
 471   if (p->fd >= 0 && ioctl(p->fd, TIOCOUTQ, &n) >= 0)
 472       prompt_Printf(arg->prompt, " Physical outq:   %d\n", n);
 473 #endif
 474
 475   prompt_Printf(arg->prompt, " Queued Packets:  %lu\n",
 476                 (u_long)link_QueueLen(&p->link));
 477   prompt_Printf(arg->prompt, " Phone Number:    %s\n", arg->cx->phone.chosen);
 478
 479   prompt_Printf(arg->prompt, "\nDefaults:\n");
 480
 481   prompt_Printf(arg->prompt, " Device List:     ");
 482   dev = p->cfg.devlist;
 483   for (n = 0; n < p->cfg.ndev; n++) {
 484     if (n)
 485       prompt_Printf(arg->prompt, ", ");
 486     prompt_Printf(arg->prompt, "\"%s\"", dev);
 487     dev += strlen(dev) + 1;
 488   }
 489
 490   prompt_Printf(arg->prompt, "\n Characteristics: ");
 491   if (physical_IsSync(arg->cx->physical))
 492     prompt_Printf(arg->prompt, "sync");
 493   else
 494     prompt_Printf(arg->prompt, "%dbps", p->cfg.speed);
 495
 496   switch (p->cfg.parity & CSIZE) {
 497   case CS7:
 498     prompt_Printf(arg->prompt, ", cs7");
 499     break;
 500   case CS8:
 501     prompt_Printf(arg->prompt, ", cs8");
 502     break;
 503   }
 504   if (p->cfg.parity & PARENB) {
 505     if (p->cfg.parity & PARODD)
 506       prompt_Printf(arg->prompt, ", odd parity");
 507     else
 508       prompt_Printf(arg->prompt, ", even parity");
 509   } else
 510     prompt_Printf(arg->prompt, ", no parity");
 511
 512   prompt_Printf(arg->prompt, ", CTS/RTS %s\n", (p->cfg.rts_cts ? "on" : "off"));
 513
 514   prompt_Printf(arg->prompt, " CD check delay:  ");
 515   cd = p->handler ? &p->handler->cd : &p->cfg.cd;
 516   if (cd->necessity == CD_NOTREQUIRED)
 517     prompt_Printf(arg->prompt, "no cd");
 518   else if (p->cfg.cd.necessity == CD_DEFAULT) {
 519     prompt_Printf(arg->prompt, "device specific");
 520   } else {
 521     prompt_Printf(arg->prompt, "%d second%s", p->cfg.cd.delay,
 522                   p->cfg.cd.delay == 1 ? "" : "s");
 523     if (p->cfg.cd.necessity == CD_REQUIRED)
 524       prompt_Printf(arg->prompt, " (required!)");
 525   }
 526   prompt_Printf(arg->prompt, "\n\n");
 527
 528   throughput_disp(&p->link.stats.total, arg->prompt);
 529
 530   return 0;
 531 }
 532
 533 void
 534 physical_DescriptorRead(struct fdescriptor *d, struct bundle *bundle,
 535                         const fd_set *fdset)
 536 {
 537   struct physical *p = descriptor2physical(d);
 538   u_char *rbuff;
 539   int n, found;
 540
 541   rbuff = p->input.buf + p->input.sz;
 542
 543   /* something to read */
 544   n = physical_Read(p, rbuff, sizeof p->input.buf - p->input.sz);
 545   log_Printf(LogDEBUG, "%s: DescriptorRead: read %d/%d from %d\n",
 546              p->link.name, n, (int)(sizeof p->input.buf - p->input.sz), p->fd);
 547   if (n <= 0) {
 548     if (n < 0)
 549       log_Printf(LogPHASE, "%s: read (%d): %s\n", p->link.name, p->fd,
 550                  strerror(errno));
 551     else
 552       log_Printf(LogPHASE, "%s: read (%d): Got zero bytes\n",
 553                  p->link.name, p->fd);
 554     datalink_Down(p->dl, CLOSE_NORMAL);
 555     return;
 556   }
 557
 558   rbuff -= p->input.sz;
 559   n += p->input.sz;
 560
 561   if (p->link.lcp.fsm.state <= ST_CLOSED) {
 562     if (p->type != PHYS_DEDICATED) {
 563       found = hdlc_Detect((u_char const **)&rbuff, n, physical_IsSync(p));
 564       if (rbuff != p->input.buf)
 565         log_WritePrompts(p->dl, "%.*s", (int)(rbuff - p->input.buf),
 566                          p->input.buf);
 567       p->input.sz = n - (rbuff - p->input.buf);
 568
 569       if (found) {
 570         /* LCP packet is detected. Turn ourselves into packet mode */
 571         log_Printf(LogPHASE, "%s: PPP packet detected, coming up\n",
 572                    p->link.name);
 573         log_SetTtyCommandMode(p->dl);
 574         datalink_Up(p->dl, 0, 1);
 575         link_PullPacket(&p->link, rbuff, p->input.sz, bundle);
 576         p->input.sz = 0;
 577       } else
 578         bcopy(rbuff, p->input.buf, p->input.sz);
 579     } else
 580       /* In -dedicated mode, we just discard input until LCP is started */
 581       p->input.sz = 0;
 582   } else if (n > 0)
 583     link_PullPacket(&p->link, rbuff, n, bundle);
 584 }
 585
 586 struct physical *
 587 iov2physical(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
 588              int fd, int *auxfd, int *nauxfd)
 589 {
 590   struct physical *p;
 591   int len, h, type;
 592
 593   p = (struct physical *)iov[(*niov)++].iov_base;
 594   p->link.name = dl->name;
 595   memset(p->link.Queue, '\0', sizeof p->link.Queue);
 596
 597   p->desc.UpdateSet = physical_UpdateSet;
 598   p->desc.IsSet = physical_IsSet;
 599   p->desc.Read = physical_DescriptorRead;
 600   p->desc.Write = physical_DescriptorWrite;
 601   p->type = PHYS_DIRECT;
 602   p->dl = dl;
 603   len = strlen(_PATH_DEV);
 604   p->out = NULL;
 605   p->connect_count = 1;
 606
 607   physical_SetDevice(p, p->name.full);
 608
 609   p->link.lcp.fsm.bundle = dl->bundle;
 610   p->link.lcp.fsm.link = &p->link;
 611   memset(&p->link.lcp.fsm.FsmTimer, '\0', sizeof p->link.lcp.fsm.FsmTimer);
 612   memset(&p->link.lcp.fsm.OpenTimer, '\0', sizeof p->link.lcp.fsm.OpenTimer);
 613   memset(&p->link.lcp.fsm.StoppedTimer, '\0',
 614          sizeof p->link.lcp.fsm.StoppedTimer);
 615   p->link.lcp.fsm.parent = &dl->fsmp;
 616   lcp_SetupCallbacks(&p->link.lcp);
 617
 618   p->link.ccp.fsm.bundle = dl->bundle;
 619   p->link.ccp.fsm.link = &p->link;
 620   /* Our in.state & out.state are NULL (no link-level ccp yet) */
 621   memset(&p->link.ccp.fsm.FsmTimer, '\0', sizeof p->link.ccp.fsm.FsmTimer);
 622   memset(&p->link.ccp.fsm.OpenTimer, '\0', sizeof p->link.ccp.fsm.OpenTimer);
 623   memset(&p->link.ccp.fsm.StoppedTimer, '\0',
 624          sizeof p->link.ccp.fsm.StoppedTimer);
 625   p->link.ccp.fsm.parent = &dl->fsmp;
 626   ccp_SetupCallbacks(&p->link.ccp);
 627
 628   p->hdlc.lqm.owner = &p->link.lcp;
 629   p->hdlc.ReportTimer.state = TIMER_STOPPED;
 630   p->hdlc.lqm.timer.state = TIMER_STOPPED;
 631
 632   p->fd = fd;
 633   p->link.stats.total.in.SampleOctets = (long long *)iov[(*niov)++].iov_base;
 634   p->link.stats.total.out.SampleOctets = (long long *)iov[(*niov)++].iov_base;
 635   p->link.stats.parent = dl->bundle->ncp.mp.active ?
 636     &dl->bundle->ncp.mp.link.stats.total : NULL;
 637   p->link.stats.gather = 1;
 638
 639   type = (long)p->handler;
 640   p->handler = NULL;
 641   for (h = 0; h < NDEVICES && p->handler == NULL; h++)
 642     p->handler = (*devices[h].iov2device)(type, p, iov, niov, maxiov,
 643                                           auxfd, nauxfd);
 644   if (p->handler == NULL) {
 645     log_Printf(LogPHASE, "%s: Unknown link type\n", p->link.name);
 646     free(iov[(*niov)++].iov_base);
 647     physical_SetupStack(p, "unknown", PHYSICAL_NOFORCE);
 648   } else
 649     log_Printf(LogPHASE, "%s: Device %s, link type is %s\n",
 650                p->link.name, p->name.full, p->handler->name);
 651
 652   if (p->hdlc.lqm.method && p->hdlc.lqm.timer.load)
 653     lqr_reStart(&p->link.lcp);
 654   hdlc_StartTimer(&p->hdlc);
 655
 656   throughput_restart(&p->link.stats.total, "physical throughput",
 657                      Enabled(dl->bundle, OPT_THROUGHPUT));
 658
 659   return p;
 660 }
 661
 662 int
 663 physical_MaxDeviceSize(void)
 664 {
 665   int biggest, sz, n;
 666
 667   biggest = sizeof(struct device);
 668   for (sz = n = 0; n < NDEVICES; n++)
 669     if (devices[n].DeviceSize) {
 670       sz = (*devices[n].DeviceSize)();
 671       if (biggest < sz)
 672         biggest = sz;
 673     }
 674
 675   return biggest;
 676 }
 677
 678 int
 679 physical2iov(struct physical *p, struct iovec *iov, int *niov, int maxiov,
 680              int *auxfd, int *nauxfd)
 681 {
 682   struct device *h;
 683   int sz;
 684
 685   h = NULL;
 686   if (p) {
 687     hdlc_StopTimer(&p->hdlc);
 688     lqr_StopTimer(p);
 689     timer_Stop(&p->link.lcp.fsm.FsmTimer);
 690     timer_Stop(&p->link.ccp.fsm.FsmTimer);
 691     timer_Stop(&p->link.lcp.fsm.OpenTimer);
 692     timer_Stop(&p->link.ccp.fsm.OpenTimer);
 693     timer_Stop(&p->link.lcp.fsm.StoppedTimer);
 694     timer_Stop(&p->link.ccp.fsm.StoppedTimer);
 695     if (p->handler) {
 696       h = p->handler;
 697       p->handler = (struct device *)(long)p->handler->type;
 698     }
 699
 700     if (Enabled(p->dl->bundle, OPT_KEEPSESSION) ||
 701         tcgetpgrp(p->fd) == getpgrp())
 702       p->session_owner = getpid();      /* So I'll eventually get HUP'd */
 703     else
 704       p->session_owner = (pid_t)-1;
 705     timer_Stop(&p->link.stats.total.Timer);
 706   }
 707
 708   if (*niov + 2 >= maxiov) {
 709     log_Printf(LogERROR, "physical2iov: No room for physical + throughput"
 710                " + device !\n");
 711     if (p)
 712       free(p);
 713     return -1;
 714   }
 715
 716   iov[*niov].iov_base = (void *)p;
 717   iov[*niov].iov_len = sizeof *p;
 718   (*niov)++;
 719
 720   iov[*niov].iov_base = p ? (void *)p->link.stats.total.in.SampleOctets : NULL;
 721   iov[*niov].iov_len = SAMPLE_PERIOD * sizeof(long long);
 722   (*niov)++;
 723   iov[*niov].iov_base = p ? (void *)p->link.stats.total.out.SampleOctets : NULL;
 724   iov[*niov].iov_len = SAMPLE_PERIOD * sizeof(long long);
 725   (*niov)++;
 726
 727   sz = physical_MaxDeviceSize();
 728   if (p) {
 729     if (h && h->device2iov)
 730       (*h->device2iov)(h, iov, niov, maxiov, auxfd, nauxfd);
 731     else {
 732       iov[*niov].iov_base = malloc(sz);
 733       if (h)
 734         memcpy(iov[*niov].iov_base, h, sizeof *h);
 735       iov[*niov].iov_len = sz;
 736       (*niov)++;
 737     }
 738   } else {
 739     iov[*niov].iov_base = NULL;
 740     iov[*niov].iov_len = sz;
 741     (*niov)++;
 742   }
 743
 744   return p ? p->fd : 0;
 745 }
 746
 747 const char *
 748 physical_LockedDevice(struct physical *p)
 749 {
 750   if (p->fd >= 0 && *p->name.full == '/' && p->type != PHYS_DIRECT)
 751     return p->name.base;
 752
 753   return NULL;
 754 }
 755
 756 void
 757 physical_ChangedPid(struct physical *p, pid_t newpid)
 758 {
 759   if (physical_LockedDevice(p)) {
 760     int res;
 761
 762     if ((res = ID0uu_lock_txfr(p->name.base, newpid)) != UU_LOCK_OK)
 763       log_Printf(LogPHASE, "uu_lock_txfr: %s\n", uu_lockerr(res));
 764   }
 765 }
 766
 767 int
 768 physical_IsSync(struct physical *p)
 769 {
 770    return p->cfg.speed == 0;
 771 }
 772
 773 u_short
 774 physical_DeviceMTU(struct physical *p)
 775 {
 776   return p->handler ? p->handler->mtu : 0;
 777 }
 778
 779 const char *
 780 physical_GetDevice(struct physical *p)
 781 {
 782    return p->name.full;
 783 }
 784
 785 void
 786 physical_SetDeviceList(struct physical *p, int argc, const char *const *argv)
 787 {
 788   int f, pos;
 789
 790   p->cfg.devlist[sizeof p->cfg.devlist - 1] = '\0';
 791   for (f = 0, pos = 0; f < argc && pos < sizeof p->cfg.devlist - 1; f++) {
 792     if (pos)
 793       p->cfg.devlist[pos++] = '\0';
 794     strncpy(p->cfg.devlist + pos, argv[f], sizeof p->cfg.devlist - pos - 1);
 795     pos += strlen(p->cfg.devlist + pos);
 796   }
 797   p->cfg.ndev = f;
 798 }
 799
 800 void
 801 physical_SetSync(struct physical *p)
 802 {
 803    p->cfg.speed = 0;
 804 }
 805
 806 int
 807 physical_SetRtsCts(struct physical *p, int enable)
 808 {
 809    p->cfg.rts_cts = enable ? 1 : 0;
 810    return 1;
 811 }
 812
 813 ssize_t
 814 physical_Read(struct physical *p, void *buf, size_t nbytes)
 815 {
 816   ssize_t ret;
 817
 818   if (p->handler && p->handler->read)
 819     ret = (*p->handler->read)(p, buf, nbytes);
 820   else
 821     ret = read(p->fd, buf, nbytes);
 822
 823   log_DumpBuff(LogPHYSICAL, "read", buf, ret);
 824
 825   return ret;
 826 }
 827
 828 ssize_t
 829 physical_Write(struct physical *p, const void *buf, size_t nbytes)
 830 {
 831   log_DumpBuff(LogPHYSICAL, "write", buf, nbytes);
 832
 833   if (p->handler && p->handler->write)
 834     return (*p->handler->write)(p, buf, nbytes);
 835
 836   return write(p->fd, buf, nbytes);
 837 }
 838
 839 int
 840 physical_doUpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
 841                      int *n, int force)
 842 {
 843   struct physical *p = descriptor2physical(d);
 844   int sets;
 845
 846   sets = 0;
 847   if (p->fd >= 0) {
 848     if (r) {
 849       FD_SET(p->fd, r);
 850       log_Printf(LogTIMER, "%s: fdset(r) %d\n", p->link.name, p->fd);
 851       sets++;
 852     }
 853     if (e) {
 854       FD_SET(p->fd, e);
 855       log_Printf(LogTIMER, "%s: fdset(e) %d\n", p->link.name, p->fd);
 856       sets++;
 857     }
 858     if (w && (force || link_QueueLen(&p->link) || p->out)) {
 859       FD_SET(p->fd, w);
 860       log_Printf(LogTIMER, "%s: fdset(w) %d\n", p->link.name, p->fd);
 861       sets++;
 862     }
 863     if (sets && *n < p->fd + 1)
 864       *n = p->fd + 1;
 865   }
 866
 867   return sets;
 868 }
 869
 870 int
 871 physical_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e)
 872 {
 873   if (p->handler && p->handler->removefromset)
 874     return (*p->handler->removefromset)(p, r, w, e);
 875   else {
 876     int sets;
 877
 878     sets = 0;
 879     if (p->fd >= 0) {
 880       if (r && FD_ISSET(p->fd, r)) {
 881         FD_CLR(p->fd, r);
 882         log_Printf(LogTIMER, "%s: fdunset(r) %d\n", p->link.name, p->fd);
 883         sets++;
 884       }
 885       if (e && FD_ISSET(p->fd, e)) {
 886         FD_CLR(p->fd, e);
 887         log_Printf(LogTIMER, "%s: fdunset(e) %d\n", p->link.name, p->fd);
 888         sets++;
 889       }
 890       if (w && FD_ISSET(p->fd, w)) {
 891         FD_CLR(p->fd, w);
 892         log_Printf(LogTIMER, "%s: fdunset(w) %d\n", p->link.name, p->fd);
 893         sets++;
 894       }
 895     }
 896
 897     return sets;
 898   }
 899 }
 900
 901 int
 902 physical_IsSet(struct fdescriptor *d, const fd_set *fdset)
 903 {
 904   struct physical *p = descriptor2physical(d);
 905   return p->fd >= 0 && FD_ISSET(p->fd, fdset);
 906 }
 907
 908 void
 909 physical_Login(struct physical *p, const char *name)
 910 {
 911   if (p->type == PHYS_DIRECT && *p->name.base && !p->Utmp) {
 912     struct utmp ut;
 913     const char *connstr;
 914     char *colon;
 915
 916     memset(&ut, 0, sizeof ut);
 917     time(&ut.ut_time);
 918     strncpy(ut.ut_name, name, sizeof ut.ut_name);
 919     if (p->handler && (p->handler->type == TCP_DEVICE ||
 920                        p->handler->type == UDP_DEVICE)) {
 921       strncpy(ut.ut_line, PPPOTCPLINE, sizeof ut.ut_line);
 922       strncpy(ut.ut_host, p->name.base, sizeof ut.ut_host);
 923       colon = memchr(ut.ut_host, ':', sizeof ut.ut_host);
 924       if (colon)
 925         *colon = '\0';
 926     } else
 927       strncpy(ut.ut_line, p->name.base, sizeof ut.ut_line);
 928     if ((connstr = getenv("CONNECT")))
 929       /* mgetty sets this to the connection speed */
 930       strncpy(ut.ut_host, connstr, sizeof ut.ut_host);
 931     ID0login(&ut);
 932     p->Utmp = ut.ut_time;
 933   }
 934 }
 935
 936 int
 937 physical_SetMode(struct physical *p, int mode)
 938 {
 939   if ((p->type & (PHYS_DIRECT|PHYS_DEDICATED) ||
 940        mode & (PHYS_DIRECT|PHYS_DEDICATED)) &&
 941       (!(p->type & PHYS_DIRECT) || !(mode & PHYS_BACKGROUND))) {
 942     /* Note:  The -direct -> -background is for callback ! */
 943     log_Printf(LogWARN, "%s: Cannot change mode %s to %s\n", p->link.name,
 944                mode2Nam(p->type), mode2Nam(mode));
 945     return 0;
 946   }
 947   p->type = mode;
 948   return 1;
 949 }
 950
 951 void
 952 physical_DeleteQueue(struct physical *p)
 953 {
 954   if (p->out) {
 955     m_freem(p->out);
 956     p->out = NULL;
 957   }
 958   link_DeleteQueue(&p->link);
 959 }
 960
 961 void
 962 physical_SetDevice(struct physical *p, const char *name)
 963 {
 964   int len = strlen(_PATH_DEV);
 965
 966   if (name != p->name.full) {
 967     strncpy(p->name.full, name, sizeof p->name.full - 1);
 968     p->name.full[sizeof p->name.full - 1] = '\0';
 969   }
 970   p->name.base = *p->name.full == '!' ?  p->name.full + 1 :
 971                  strncmp(p->name.full, _PATH_DEV, len) ?
 972                  p->name.full : p->name.full + len;
 973 }
 974
 975 static void
 976 physical_Found(struct physical *p)
 977 {
 978   FILE *lockfile;
 979   char fn[PATH_MAX];
 980
 981   if (*p->name.full == '/') {
 982     snprintf(fn, sizeof fn, "%s%s.if", _PATH_VARRUN, p->name.base);
 983     lockfile = ID0fopen(fn, "w");
 984     if (lockfile != NULL) {
 985       fprintf(lockfile, "%s%d\n", TUN_NAME, p->dl->bundle->unit);
 986       fclose(lockfile);
 987     } else
 988       log_Printf(LogALERT, "%s: Can't create %s: %s\n",
 989                  p->link.name, fn, strerror(errno));
 990   }
 991
 992   throughput_start(&p->link.stats.total, "physical throughput",
 993                    Enabled(p->dl->bundle, OPT_THROUGHPUT));
 994   p->connect_count++;
 995   p->input.sz = 0;
 996
 997   log_Printf(LogPHASE, "%s: Connected!\n", p->link.name);
 998 }
 999
1000 int
1001 physical_Open(struct physical *p, struct bundle *bundle)
1002 {
1003   int devno, h, wasfd, err;
1004   char *dev;
1005
1006   if (p->fd >= 0)
1007     log_Printf(LogDEBUG, "%s: Open: Modem is already open!\n", p->link.name);
1008     /* We're going back into "term" mode */
1009   else if (p->type == PHYS_DIRECT) {
1010     physical_SetDevice(p, "");
1011     p->fd = STDIN_FILENO;
1012     for (h = 0; h < NDEVICES && p->handler == NULL && p->fd >= 0; h++)
1013       p->handler = (*devices[h].create)(p);
1014     if (p->fd >= 0) {
1015       if (p->handler == NULL) {
1016         physical_SetupStack(p, "unknown", PHYSICAL_NOFORCE);
1017         log_Printf(LogDEBUG, "%s: stdin is unidentified\n", p->link.name);
1018       }
1019       physical_Found(p);
1020     }
1021   } else {
1022     dev = p->cfg.devlist;
1023     devno = 0;
1024     while (devno < p->cfg.ndev && p->fd < 0) {
1025       physical_SetDevice(p, dev);
1026       if (physical_Lock(p)) {
1027         err = 0;
1028
1029         if (*p->name.full == '/') {
1030           p->fd = ID0open(p->name.full, O_RDWR | O_NONBLOCK);
1031           if (p->fd < 0)
1032             err = errno;
1033         }
1034
1035         wasfd = p->fd;
1036         for (h = 0; h < NDEVICES && p->handler == NULL; h++)
1037           if ((p->handler = (*devices[h].create)(p)) == NULL && wasfd != p->fd)
1038             break;
1039
1040         if (p->fd < 0) {
1041           if (h == NDEVICES) {
1042             if (err)
1043               log_Printf(LogWARN, "%s: %s: %s\n", p->link.name, p->name.full,
1044                          strerror(errno));
1045             else
1046               log_Printf(LogWARN, "%s: Device (%s) must begin with a '/',"
1047                          " a '!' or contain at least one ':'\n", p->link.name,
1048                          p->name.full);
1049           }
1050           physical_Unlock(p);
1051         } else
1052           physical_Found(p);
1053       }
1054       dev += strlen(dev) + 1;
1055       devno++;
1056     }
1057   }
1058
1059   return p->fd;
1060 }
1061
1062 void
1063 physical_SetupStack(struct physical *p, const char *who, int how)
1064 {
1065   link_EmptyStack(&p->link);
1066   if (how == PHYSICAL_FORCE_SYNC || how == PHYSICAL_FORCE_SYNCNOACF ||
1067       (how == PHYSICAL_NOFORCE && physical_IsSync(p)))
1068     link_Stack(&p->link, &synclayer);
1069   else {
1070     link_Stack(&p->link, &asynclayer);
1071     link_Stack(&p->link, &hdlclayer);
1072   }
1073   if (how != PHYSICAL_FORCE_SYNCNOACF)
1074     link_Stack(&p->link, &acflayer);
1075   link_Stack(&p->link, &protolayer);
1076   link_Stack(&p->link, &lqrlayer);
1077   link_Stack(&p->link, &ccplayer);
1078   link_Stack(&p->link, &vjlayer);
1079   link_Stack(&p->link, &tcpmsslayer);
1080 #ifndef NONAT
1081   link_Stack(&p->link, &natlayer);
1082 #endif
1083   if (how == PHYSICAL_FORCE_ASYNC && physical_IsSync(p)) {
1084     log_Printf(LogWARN, "Sync device setting ignored for ``%s'' device\n", who);
1085     p->cfg.speed = MODEM_SPEED;
1086   } else if (how == PHYSICAL_FORCE_SYNC && !physical_IsSync(p)) {
1087     log_Printf(LogWARN, "Async device setting ignored for ``%s'' device\n",
1088                who);
1089     physical_SetSync(p);
1090   }
1091 }
1092
1093 void
1094 physical_StopDeviceTimer(struct physical *p)
1095 {
1096   if (p->handler && p->handler->stoptimer)
1097     (*p->handler->stoptimer)(p);
1098 }
1099
1100 int
1101 physical_AwaitCarrier(struct physical *p)
1102 {
1103   if (p->handler && p->handler->awaitcarrier)
1104     return (*p->handler->awaitcarrier)(p);
1105
1106   return CARRIER_OK;
1107 }
1108
1109
1110 void
1111 physical_SetAsyncParams(struct physical *p, u_int32_t mymap, u_int32_t hismap)
1112 {
1113   if (p->handler && p->handler->setasyncparams)
1114     return (*p->handler->setasyncparams)(p, mymap, hismap);
1115
1116   async_SetLinkParams(&p->async, mymap, hismap);
1117 }
1118
1119 int
1120 physical_Slot(struct physical *p)
1121 {
1122   if (p->handler && p->handler->slot)
1123     return (*p->handler->slot)(p);
1124
1125   return -1;
1126 }