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  * $FreeBSD$
  20  *
  21  */
  22
  23 #include <sys/param.h>
  24 #include <netinet/in.h>
  25 #include <netinet/in_systm.h>
  26 #include <netinet/ip.h>
  27 #include <sys/socket.h>
  28 #include <sys/un.h>
  29
  30 #include <errno.h>
  31 #include <fcntl.h>
  32 #include <paths.h>
  33 #ifdef NOSUID
  34 #include <signal.h>
  35 #endif
  36 #include <stdarg.h>
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40 #include <sys/uio.h>
  41 #include <sysexits.h>
  42 #include <termios.h>
  43 #include <time.h>
  44 #include <unistd.h>
  45 #include <utmp.h>
  46 #if defined(__OpenBSD__) || defined(__NetBSD__)
  47 #include <sys/ioctl.h>
  48 #include <util.h>
  49 #else
  50 #include <libutil.h>
  51 #endif
  52
  53 #include "layer.h"
  54 #ifndef NONAT
  55 #include "nat_cmd.h"
  56 #endif
  57 #include "proto.h"
  58 #include "acf.h"
  59 #include "vjcomp.h"
  60 #include "defs.h"
  61 #include "command.h"
  62 #include "mbuf.h"
  63 #include "log.h"
  64 #include "id.h"
  65 #include "timer.h"
  66 #include "fsm.h"
  67 #include "lqr.h"
  68 #include "hdlc.h"
  69 #include "lcp.h"
  70 #include "throughput.h"
  71 #include "sync.h"
  72 #include "async.h"
  73 #include "iplist.h"
  74 #include "slcompress.h"
  75 #include "ncpaddr.h"
  76 #include "ipcp.h"
  77 #include "filter.h"
  78 #include "descriptor.h"
  79 #include "ccp.h"
  80 #include "link.h"
  81 #include "physical.h"
  82 #include "mp.h"
  83 #ifndef NORADIUS
  84 #include "radius.h"
  85 #endif
  86 #include "ipv6cp.h"
  87 #include "ncp.h"
  88 #include "bundle.h"
  89 #include "prompt.h"
  90 #include "chat.h"
  91 #include "auth.h"
  92 #include "main.h"
  93 #include "chap.h"
  94 #include "cbcp.h"
  95 #include "datalink.h"
  96 #include "tcp.h"
  97 #include "udp.h"
  98 #include "exec.h"
  99 #include "tty.h"
 100 #ifndef NONETGRAPH
 101 #include "ether.h"
 102 #include "netgraph.h"
 103 #endif
 104 #ifndef NOATM
 105 #include "atm.h"
 106 #endif
 107 #include "tcpmss.h"
 108
 109 #define PPPOTCPLINE "ppp"
 110
 111 static int physical_DescriptorWrite(struct fdescriptor *, struct bundle *,
 112                                     const fd_set *);
 113
 114 static unsigned
 115 physical_DeviceSize(void)
 116 {
 117   return sizeof(struct device);
 118 }
 119
 120 struct {
 121   struct device *(*create)(struct physical *);
 122   struct device *(*iov2device)(int, struct physical *, struct iovec *,
 123                                int *, int, int *, int *);
 124   unsigned (*DeviceSize)(void);
 125 } devices[] = {
 126   { tty_Create, tty_iov2device, tty_DeviceSize },
 127 #ifndef NONETGRAPH
 128   /*
 129    * This must come before ``udp'' so that the probe routine is
 130    * able to identify it as a more specific type of SOCK_DGRAM.
 131    */
 132   { ether_Create, ether_iov2device, ether_DeviceSize },
 133 #ifdef EXPERIMENTAL_NETGRAPH
 134   { ng_Create, ng_iov2device, ng_DeviceSize },
 135 #endif
 136 #endif
 137 #ifndef NOATM
 138   /* Ditto for ATM devices */
 139   { atm_Create, atm_iov2device, atm_DeviceSize },
 140 #endif
 141   { tcp_Create, tcp_iov2device, tcp_DeviceSize },
 142   { udp_Create, udp_iov2device, udp_DeviceSize },
 143   { exec_Create, exec_iov2device, exec_DeviceSize }
 144 };
 145
 146 #define NDEVICES (sizeof devices / sizeof devices[0])
 147
 148 static int
 149 physical_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
 150                    int *n)
 151 {
 152   return physical_doUpdateSet(d, r, w, e, n, 0);
 153 }
 154
 155 void
 156 physical_SetDescriptor(struct physical *p)
 157 {
 158   p->desc.type = PHYSICAL_DESCRIPTOR;
 159   p->desc.UpdateSet = physical_UpdateSet;
 160   p->desc.IsSet = physical_IsSet;
 161   p->desc.Read = physical_DescriptorRead;
 162   p->desc.Write = physical_DescriptorWrite;
 163 }
 164
 165 struct physical *
 166 physical_Create(struct datalink *dl, int type)
 167 {
 168   struct physical *p;
 169
 170   p = (struct physical *)malloc(sizeof(struct physical));
 171   if (!p)
 172     return NULL;
 173
 174   p->link.type = PHYSICAL_LINK;
 175   p->link.name = dl->name;
 176   p->link.len = sizeof *p;
 177
 178   /* The sample period is fixed - see physical2iov() & iov2physical() */
 179   throughput_init(&p->link.stats.total, SAMPLE_PERIOD);
 180   p->link.stats.parent = dl->bundle->ncp.mp.active ?
 181     &dl->bundle->ncp.mp.link.stats.total : NULL;
 182   p->link.stats.gather = 1;
 183
 184   memset(p->link.Queue, '\0', sizeof p->link.Queue);
 185   memset(p->link.proto_in, '\0', sizeof p->link.proto_in);
 186   memset(p->link.proto_out, '\0', sizeof p->link.proto_out);
 187   link_EmptyStack(&p->link);
 188
 189   p->handler = NULL;
 190   physical_SetDescriptor(p);
 191   p->type = type;
 192
 193   hdlc_Init(&p->hdlc, &p->link.lcp);
 194   async_Init(&p->async);
 195
 196   p->fd = -1;
 197   p->out = NULL;
 198   p->connect_count = 0;
 199   p->dl = dl;
 200   p->input.sz = 0;
 201   *p->name.full = '\0';
 202   p->name.base = p->name.full;
 203
 204   p->Utmp = 0;
 205   p->session_owner = (pid_t)-1;
 206
 207   p->cfg.rts_cts = MODEM_CTSRTS;
 208   p->cfg.speed = MODEM_SPEED;
 209   p->cfg.parity = CS8;
 210   memcpy(p->cfg.devlist, MODEM_LIST, sizeof MODEM_LIST);
 211   p->cfg.ndev = NMODEMS;
 212   p->cfg.cd.necessity = CD_DEFAULT;
 213   p->cfg.cd.delay = 0;          /* reconfigured or device specific default */
 214
 215   lcp_Init(&p->link.lcp, dl->bundle, &p->link, &dl->fsmp);
 216   ccp_Init(&p->link.ccp, dl->bundle, &p->link, &dl->fsmp);
 217
 218   return p;
 219 }
 220
 221 static const struct parity {
 222   const char *name;
 223   const char *name1;
 224   int set;
 225 } validparity[] = {
 226   { "even", "P_EVEN", CS7 | PARENB },
 227   { "odd", "P_ODD", CS7 | PARENB | PARODD },
 228   { "none", "P_ZERO", CS8 },
 229   { NULL, NULL, 0 },
 230 };
 231
 232 static int
 233 GetParityValue(const char *str)
 234 {
 235   const struct parity *pp;
 236
 237   for (pp = validparity; pp->name; pp++) {
 238     if (strcasecmp(pp->name, str) == 0 ||
 239         strcasecmp(pp->name1, str) == 0) {
 240       return pp->set;
 241     }
 242   }
 243   return (-1);
 244 }
 245
 246 int
 247 physical_SetParity(struct physical *p, const char *str)
 248 {
 249   struct termios rstio;
 250   int val;
 251
 252   val = GetParityValue(str);
 253   if (val > 0) {
 254     p->cfg.parity = val;
 255     if (p->fd >= 0) {
 256       tcgetattr(p->fd, &rstio);
 257       rstio.c_cflag &= ~(CSIZE | PARODD | PARENB);
 258       rstio.c_cflag |= val;
 259       tcsetattr(p->fd, TCSADRAIN, &rstio);
 260     }
 261     return 0;
 262   }
 263   log_Printf(LogWARN, "%s: %s: Invalid parity\n", p->link.name, str);
 264   return -1;
 265 }
 266
 267 unsigned
 268 physical_GetSpeed(struct physical *p)
 269 {
 270   if (p->handler && p->handler->speed)
 271     return (*p->handler->speed)(p);
 272
 273   return 0;
 274 }
 275
 276 int
 277 physical_SetSpeed(struct physical *p, unsigned speed)
 278 {
 279   if (UnsignedToSpeed(speed) != B0) {
 280       p->cfg.speed = speed;
 281       return 1;
 282   }
 283
 284   return 0;
 285 }
 286
 287 int
 288 physical_Raw(struct physical *p)
 289 {
 290   if (p->handler && p->handler->raw)
 291     return (*p->handler->raw)(p);
 292
 293   return 1;
 294 }
 295
 296 void
 297 physical_Offline(struct physical *p)
 298 {
 299   if (p->handler && p->handler->offline)
 300     (*p->handler->offline)(p);
 301   log_Printf(LogPHASE, "%s: Disconnected!\n", p->link.name);
 302 }
 303
 304 static int
 305 physical_Lock(struct physical *p)
 306 {
 307   int res;
 308
 309   if (*p->name.full == '/' && p->type != PHYS_DIRECT &&
 310       (res = ID0uu_lock(p->name.base)) != UU_LOCK_OK) {
 311     if (res == UU_LOCK_INUSE)
 312       log_Printf(LogPHASE, "%s: %s is in use\n", p->link.name, p->name.full);
 313     else
 314       log_Printf(LogPHASE, "%s: %s is in use: uu_lock: %s\n",
 315                  p->link.name, p->name.full, uu_lockerr(res));
 316     return 0;
 317   }
 318
 319   return 1;
 320 }
 321
 322 static void
 323 physical_Unlock(struct physical *p)
 324 {
 325   if (*p->name.full == '/' && p->type != PHYS_DIRECT &&
 326       ID0uu_unlock(p->name.base) == -1)
 327     log_Printf(LogALERT, "%s: Can't uu_unlock %s\n", p->link.name,
 328                p->name.base);
 329 }
 330
 331 void
 332 physical_Close(struct physical *p)
 333 {
 334   int newsid;
 335   char fn[PATH_MAX];
 336
 337   if (p->fd < 0)
 338     return;
 339
 340   log_Printf(LogDEBUG, "%s: Close\n", p->link.name);
 341
 342   if (p->handler && p->handler->cooked)
 343     (*p->handler->cooked)(p);
 344
 345   physical_StopDeviceTimer(p);
 346   if (p->Utmp) {
 347     if (p->handler && (p->handler->type == TCP_DEVICE ||
 348                        p->handler->type == UDP_DEVICE))
 349       /* Careful - we logged in on line ``ppp'' with IP as our host */
 350       ID0logout(PPPOTCPLINE, 1);
 351     else
 352       ID0logout(p->name.base, 0);
 353     p->Utmp = 0;
 354   }
 355   newsid = tcgetpgrp(p->fd) == getpgrp();
 356   close(p->fd);
 357   p->fd = -1;
 358   log_SetTtyCommandMode(p->dl);
 359
 360   throughput_stop(&p->link.stats.total);
 361   throughput_log(&p->link.stats.total, LogPHASE, p->link.name);
 362
 363   if (p->session_owner != (pid_t)-1) {
 364     log_Printf(LogPHASE, "%s: HUPing %ld\n", p->link.name,
 365                (long)p->session_owner);
 366     ID0kill(p->session_owner, SIGHUP);
 367     p->session_owner = (pid_t)-1;
 368   }
 369
 370   if (newsid)
 371     bundle_setsid(p->dl->bundle, 0);
 372
 373   if (*p->name.full == '/') {
 374     snprintf(fn, sizeof fn, "%s%s.if", _PATH_VARRUN, p->name.base);
 375 #ifndef RELEASE_CRUNCH
 376     if (ID0unlink(fn) == -1)
 377       log_Printf(LogALERT, "%s: Can't remove %s: %s\n",
 378                  p->link.name, fn, strerror(errno));
 379 #else
 380     ID0unlink(fn);
 381 #endif
 382   }
 383   physical_Unlock(p);
 384   if (p->handler && p->handler->destroy)
 385     (*p->handler->destroy)(p);
 386   p->handler = NULL;
 387   p->name.base = p->name.full;
 388   *p->name.full = '\0';
 389 }
 390
 391 void
 392 physical_Destroy(struct physical *p)
 393 {
 394   physical_Close(p);
 395   throughput_destroy(&p->link.stats.total);
 396   free(p);
 397 }
 398
 399 static int
 400 physical_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle __unused,
 401                          const fd_set *fdset __unused)
 402 {
 403   struct physical *p = descriptor2physical(d);
 404   int nw, result = 0;
 405
 406   if (p->out == NULL)
 407     p->out = link_Dequeue(&p->link);
 408
 409   if (p->out) {
 410     nw = physical_Write(p, MBUF_CTOP(p->out), p->out->m_len);
 411     log_Printf(LogDEBUG, "%s: DescriptorWrite: wrote %d(%lu) to %d\n",
 412                p->link.name, nw, (unsigned long)p->out->m_len, p->fd);
 413     if (nw > 0) {
 414       p->out->m_len -= nw;
 415       p->out->m_offset += nw;
 416       if (p->out->m_len == 0)
 417         p->out = m_free(p->out);
 418       result = 1;
 419     } else if (nw < 0) {
 420       if (errno == EAGAIN)
 421         result = 1;
 422       else if (errno != ENOBUFS) {
 423         log_Printf(LogPHASE, "%s: write (fd %d, len %zd): %s\n", p->link.name,
 424                    p->fd, p->out->m_len, strerror(errno));
 425         datalink_Down(p->dl, CLOSE_NORMAL);
 426       }
 427     }
 428     /* else we shouldn't really have been called !  select() is broken ! */
 429   }
 430
 431   return result;
 432 }
 433
 434 int
 435 physical_ShowStatus(struct cmdargs const *arg)
 436 {
 437   struct physical *p = arg->cx->physical;
 438   struct cd *cd;
 439   const char *dev;
 440   int n, slot;
 441
 442   prompt_Printf(arg->prompt, "Name: %s\n", p->link.name);
 443   prompt_Printf(arg->prompt, " State:           ");
 444   if (p->fd < 0)
 445     prompt_Printf(arg->prompt, "closed\n");
 446   else {
 447     slot = physical_Slot(p);
 448     if (p->handler && p->handler->openinfo) {
 449       if (slot == -1)
 450         prompt_Printf(arg->prompt, "open (%s)\n", (*p->handler->openinfo)(p));
 451       else
 452         prompt_Printf(arg->prompt, "open (%s, port %d)\n",
 453                       (*p->handler->openinfo)(p), slot);
 454     } else if (slot == -1)
 455       prompt_Printf(arg->prompt, "open\n");
 456     else
 457       prompt_Printf(arg->prompt, "open (port %d)\n", slot);
 458   }
 459
 460   prompt_Printf(arg->prompt, " Device:          %s",
 461                 *p->name.full ?  p->name.full :
 462                 p->type == PHYS_DIRECT ? "unknown" : "N/A");
 463   if (p->session_owner != (pid_t)-1)
 464     prompt_Printf(arg->prompt, " (session owner: %ld)", (long)p->session_owner);
 465
 466   prompt_Printf(arg->prompt, "\n Link Type:       %s\n", mode2Nam(p->type));
 467   prompt_Printf(arg->prompt, " Connect Count:   %d\n", p->connect_count);
 468 #ifdef TIOCOUTQ
 469   if (p->fd >= 0 && ioctl(p->fd, TIOCOUTQ, &n) >= 0)
 470       prompt_Printf(arg->prompt, " Physical outq:   %d\n", n);
 471 #endif
 472
 473   prompt_Printf(arg->prompt, " Queued Packets:  %lu\n",
 474                 (u_long)link_QueueLen(&p->link));
 475   prompt_Printf(arg->prompt, " Phone Number:    %s\n", arg->cx->phone.chosen);
 476
 477   prompt_Printf(arg->prompt, "\nDefaults:\n");
 478
 479   prompt_Printf(arg->prompt, " Device List:     ");
 480   dev = p->cfg.devlist;
 481   for (n = 0; n < p->cfg.ndev; n++) {
 482     if (n)
 483       prompt_Printf(arg->prompt, ", ");
 484     prompt_Printf(arg->prompt, "\"%s\"", dev);
 485     dev += strlen(dev) + 1;
 486   }
 487
 488   prompt_Printf(arg->prompt, "\n Characteristics: ");
 489   if (physical_IsSync(arg->cx->physical))
 490     prompt_Printf(arg->prompt, "sync");
 491   else
 492     prompt_Printf(arg->prompt, "%dbps", p->cfg.speed);
 493
 494   switch (p->cfg.parity & CSIZE) {
 495   case CS7:
 496     prompt_Printf(arg->prompt, ", cs7");
 497     break;
 498   case CS8:
 499     prompt_Printf(arg->prompt, ", cs8");
 500     break;
 501   }
 502   if (p->cfg.parity & PARENB) {
 503     if (p->cfg.parity & PARODD)
 504       prompt_Printf(arg->prompt, ", odd parity");
 505     else
 506       prompt_Printf(arg->prompt, ", even parity");
 507   } else
 508     prompt_Printf(arg->prompt, ", no parity");
 509
 510   prompt_Printf(arg->prompt, ", CTS/RTS %s\n", (p->cfg.rts_cts ? "on" : "off"));
 511
 512   prompt_Printf(arg->prompt, " CD check delay:  ");
 513   cd = p->handler ? &p->handler->cd : &p->cfg.cd;
 514   if (cd->necessity == CD_NOTREQUIRED)
 515     prompt_Printf(arg->prompt, "no cd");
 516   else if (p->cfg.cd.necessity == CD_DEFAULT) {
 517     prompt_Printf(arg->prompt, "device specific");
 518   } else {
 519     prompt_Printf(arg->prompt, "%d second%s", p->cfg.cd.delay,
 520                   p->cfg.cd.delay == 1 ? "" : "s");
 521     if (p->cfg.cd.necessity == CD_REQUIRED)
 522       prompt_Printf(arg->prompt, " (required!)");
 523   }
 524   prompt_Printf(arg->prompt, "\n\n");
 525
 526   throughput_disp(&p->link.stats.total, arg->prompt);
 527
 528   return 0;
 529 }
 530
 531 void
 532 physical_DescriptorRead(struct fdescriptor *d, struct bundle *bundle,
 533                      const fd_set *fdset __unused)
 534 {
 535   struct physical *p = descriptor2physical(d);
 536   u_char *rbuff;
 537   int n, found;
 538
 539   rbuff = p->input.buf + p->input.sz;
 540
 541   /* something to read */
 542   n = physical_Read(p, rbuff, sizeof p->input.buf - p->input.sz);
 543   log_Printf(LogDEBUG, "%s: DescriptorRead: read %d/%d from %d\n",
 544              p->link.name, n, (int)(sizeof p->input.buf - p->input.sz), p->fd);
 545   if (n <= 0) {
 546     if (n < 0)
 547       log_Printf(LogPHASE, "%s: read (%d): %s\n", p->link.name, p->fd,
 548                  strerror(errno));
 549     else
 550       log_Printf(LogPHASE, "%s: read (%d): Got zero bytes\n",
 551                  p->link.name, p->fd);
 552     datalink_Down(p->dl, CLOSE_NORMAL);
 553     return;
 554   }
 555
 556   rbuff -= p->input.sz;
 557   n += p->input.sz;
 558
 559   if (p->link.lcp.fsm.state <= ST_CLOSED) {
 560     if (p->type != PHYS_DEDICATED) {
 561       found = hdlc_Detect((u_char const **)&rbuff, n, physical_IsSync(p));
 562       if (rbuff != p->input.buf)
 563         log_WritePrompts(p->dl, "%.*s", (int)(rbuff - p->input.buf),
 564                          p->input.buf);
 565       p->input.sz = n - (rbuff - p->input.buf);
 566
 567       if (found) {
 568         /* LCP packet is detected. Turn ourselves into packet mode */
 569         log_Printf(LogPHASE, "%s: PPP packet detected, coming up\n",
 570                    p->link.name);
 571         log_SetTtyCommandMode(p->dl);
 572         datalink_Up(p->dl, 0, 1);
 573         link_PullPacket(&p->link, rbuff, p->input.sz, bundle);
 574         p->input.sz = 0;
 575       } else
 576         bcopy(rbuff, p->input.buf, p->input.sz);
 577     } else
 578       /* In -dedicated mode, we just discard input until LCP is started */
 579       p->input.sz = 0;
 580   } else if (n > 0)
 581     link_PullPacket(&p->link, rbuff, n, bundle);
 582 }
 583
 584 struct physical *
 585 iov2physical(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
 586              int fd, int *auxfd, int *nauxfd)
 587 {
 588   struct physical *p;
 589   int len, type;
 590   unsigned h;
 591
 592   p = (struct physical *)iov[(*niov)++].iov_base;
 593   p->link.name = dl->name;
 594   memset(p->link.Queue, '\0', sizeof p->link.Queue);
 595
 596   p->desc.UpdateSet = physical_UpdateSet;
 597   p->desc.IsSet = physical_IsSet;
 598   p->desc.Read = physical_DescriptorRead;
 599   p->desc.Write = physical_DescriptorWrite;
 600   p->type = PHYS_DIRECT;
 601   p->dl = dl;
 602   len = strlen(_PATH_DEV);
 603   p->out = NULL;
 604   p->connect_count = 1;
 605
 606   physical_SetDevice(p, p->name.full);
 607
 608   p->link.lcp.fsm.bundle = dl->bundle;
 609   p->link.lcp.fsm.link = &p->link;
 610   memset(&p->link.lcp.fsm.FsmTimer, '\0', sizeof p->link.lcp.fsm.FsmTimer);
 611   memset(&p->link.lcp.fsm.OpenTimer, '\0', sizeof p->link.lcp.fsm.OpenTimer);
 612   memset(&p->link.lcp.fsm.StoppedTimer, '\0',
 613          sizeof p->link.lcp.fsm.StoppedTimer);
 614   p->link.lcp.fsm.parent = &dl->fsmp;
 615   lcp_SetupCallbacks(&p->link.lcp);
 616
 617   p->link.ccp.fsm.bundle = dl->bundle;
 618   p->link.ccp.fsm.link = &p->link;
 619   /* Our in.state & out.state are NULL (no link-level ccp yet) */
 620   memset(&p->link.ccp.fsm.FsmTimer, '\0', sizeof p->link.ccp.fsm.FsmTimer);
 621   memset(&p->link.ccp.fsm.OpenTimer, '\0', sizeof p->link.ccp.fsm.OpenTimer);
 622   memset(&p->link.ccp.fsm.StoppedTimer, '\0',
 623          sizeof p->link.ccp.fsm.StoppedTimer);
 624   p->link.ccp.fsm.parent = &dl->fsmp;
 625   ccp_SetupCallbacks(&p->link.ccp);
 626
 627   p->hdlc.lqm.owner = &p->link.lcp;
 628   p->hdlc.ReportTimer.state = TIMER_STOPPED;
 629   p->hdlc.lqm.timer.state = TIMER_STOPPED;
 630
 631   p->fd = fd;
 632   p->link.stats.total.in.SampleOctets = (long long *)iov[(*niov)++].iov_base;
 633   p->link.stats.total.out.SampleOctets = (long long *)iov[(*niov)++].iov_base;
 634   p->link.stats.parent = dl->bundle->ncp.mp.active ?
 635     &dl->bundle->ncp.mp.link.stats.total : NULL;
 636   p->link.stats.gather = 1;
 637
 638   type = (long)p->handler;
 639   p->handler = NULL;
 640   for (h = 0; h < NDEVICES && p->handler == NULL; h++)
 641     p->handler = (*devices[h].iov2device)(type, p, iov, niov, maxiov,
 642                                           auxfd, nauxfd);
 643   if (p->handler == NULL) {
 644     log_Printf(LogPHASE, "%s: Unknown link type\n", p->link.name);
 645     free(iov[(*niov)++].iov_base);
 646     physical_SetupStack(p, "unknown", PHYSICAL_NOFORCE);
 647   } else
 648     log_Printf(LogPHASE, "%s: Device %s, link type is %s\n",
 649                p->link.name, p->name.full, p->handler->name);
 650
 651   if (p->hdlc.lqm.method && p->hdlc.lqm.timer.load)
 652     lqr_reStart(&p->link.lcp);
 653   hdlc_StartTimer(&p->hdlc);
 654
 655   throughput_restart(&p->link.stats.total, "physical throughput",
 656                      Enabled(dl->bundle, OPT_THROUGHPUT));
 657
 658   return p;
 659 }
 660
 661 unsigned
 662 physical_MaxDeviceSize()
 663 {
 664   unsigned biggest, sz, n;
 665
 666   biggest = sizeof(struct device);
 667   for (n = 0; n < NDEVICES; n++)
 668     if (devices[n].DeviceSize) {
 669       sz = (*devices[n].DeviceSize)();
 670       if (biggest < sz)
 671         biggest = sz;
 672     }
 673
 674   return biggest;
 675 }
 676
 677 int
 678 physical2iov(struct physical *p, struct iovec *iov, int *niov, int maxiov,
 679              int *auxfd, int *nauxfd)
 680 {
 681   struct device *h;
 682   int sz;
 683
 684   h = NULL;
 685   if (p) {
 686     hdlc_StopTimer(&p->hdlc);
 687     lqr_StopTimer(p);
 688     timer_Stop(&p->link.lcp.fsm.FsmTimer);
 689     timer_Stop(&p->link.ccp.fsm.FsmTimer);
 690     timer_Stop(&p->link.lcp.fsm.OpenTimer);
 691     timer_Stop(&p->link.ccp.fsm.OpenTimer);
 692     timer_Stop(&p->link.lcp.fsm.StoppedTimer);
 693     timer_Stop(&p->link.ccp.fsm.StoppedTimer);
 694     if (p->handler) {
 695       h = p->handler;
 696       p->handler = (struct device *)(long)p->handler->type;
 697     }
 698
 699     if (Enabled(p->dl->bundle, OPT_KEEPSESSION) ||
 700         tcgetpgrp(p->fd) == getpgrp())
 701       p->session_owner = getpid();      /* So I'll eventually get HUP'd */
 702     else
 703       p->session_owner = (pid_t)-1;
 704     timer_Stop(&p->link.stats.total.Timer);
 705   }
 706
 707   if (*niov + 2 >= maxiov) {
 708     log_Printf(LogERROR, "physical2iov: No room for physical + throughput"
 709                " + device !\n");
 710     if (p)
 711       free(p);
 712     return -1;
 713   }
 714
 715   iov[*niov].iov_base = (void *)p;
 716   iov[*niov].iov_len = sizeof *p;
 717   (*niov)++;
 718
 719   iov[*niov].iov_base = p ? (void *)p->link.stats.total.in.SampleOctets : NULL;
 720   iov[*niov].iov_len = SAMPLE_PERIOD * sizeof(long long);
 721   (*niov)++;
 722   iov[*niov].iov_base = p ? (void *)p->link.stats.total.out.SampleOctets : NULL;
 723   iov[*niov].iov_len = SAMPLE_PERIOD * sizeof(long long);
 724   (*niov)++;
 725
 726   sz = physical_MaxDeviceSize();
 727   if (p) {
 728     if (h && h->device2iov)
 729       (*h->device2iov)(h, iov, niov, maxiov, auxfd, nauxfd);
 730     else {
 731       if ((iov[*niov].iov_base = malloc(sz)) == NULL) {
 732         log_Printf(LogALERT, "physical2iov: Out of memory (%d bytes)\n", sz);
 733         AbortProgram(EX_OSERR);
 734       }
 735       if (h)
 736         memcpy(iov[*niov].iov_base, h, sizeof *h);
 737       iov[*niov].iov_len = sz;
 738       (*niov)++;
 739     }
 740   } else {
 741     iov[*niov].iov_base = NULL;
 742     iov[*niov].iov_len = sz;
 743     (*niov)++;
 744   }
 745
 746   return p ? p->fd : 0;
 747 }
 748
 749 const char *
 750 physical_LockedDevice(struct physical *p)
 751 {
 752   if (p->fd >= 0 && *p->name.full == '/' && p->type != PHYS_DIRECT)
 753     return p->name.base;
 754
 755   return NULL;
 756 }
 757
 758 void
 759 physical_ChangedPid(struct physical *p, pid_t newpid)
 760 {
 761   if (physical_LockedDevice(p)) {
 762     int res;
 763
 764     if ((res = ID0uu_lock_txfr(p->name.base, newpid)) != UU_LOCK_OK)
 765       log_Printf(LogPHASE, "uu_lock_txfr: %s\n", uu_lockerr(res));
 766   }
 767 }
 768
 769 int
 770 physical_IsSync(struct physical *p)
 771 {
 772    return p->cfg.speed == 0;
 773 }
 774
 775 u_short
 776 physical_DeviceMTU(struct physical *p)
 777 {
 778   return p->handler ? p->handler->mtu : 0;
 779 }
 780
 781 const char *physical_GetDevice(struct physical *p)
 782 {
 783    return p->name.full;
 784 }
 785
 786 void
 787 physical_SetDeviceList(struct physical *p, int argc, const char *const *argv)
 788 {
 789   unsigned pos;
 790   int f;
 791
 792   p->cfg.devlist[sizeof p->cfg.devlist - 1] = '\0';
 793   for (f = 0, pos = 0; f < argc && pos < sizeof p->cfg.devlist - 1; f++) {
 794     if (pos)
 795       p->cfg.devlist[pos++] = '\0';
 796     strncpy(p->cfg.devlist + pos, argv[f], sizeof p->cfg.devlist - pos - 1);
 797     pos += strlen(p->cfg.devlist + pos);
 798   }
 799   p->cfg.ndev = f;
 800 }
 801
 802 void
 803 physical_SetSync(struct physical *p)
 804 {
 805    p->cfg.speed = 0;
 806 }
 807
 808 int
 809 physical_SetRtsCts(struct physical *p, int enable)
 810 {
 811    p->cfg.rts_cts = enable ? 1 : 0;
 812    return 1;
 813 }
 814
 815 ssize_t
 816 physical_Read(struct physical *p, void *buf, size_t nbytes)
 817 {
 818   ssize_t ret;
 819
 820   if (p->handler && p->handler->read)
 821     ret = (*p->handler->read)(p, buf, nbytes);
 822   else
 823     ret = read(p->fd, buf, nbytes);
 824
 825   log_DumpBuff(LogPHYSICAL, "read", buf, ret);
 826
 827   return ret;
 828 }
 829
 830 ssize_t
 831 physical_Write(struct physical *p, const void *buf, size_t nbytes)
 832 {
 833   log_DumpBuff(LogPHYSICAL, "write", buf, nbytes);
 834
 835   if (p->handler && p->handler->write)
 836     return (*p->handler->write)(p, buf, nbytes);
 837
 838   return write(p->fd, buf, nbytes);
 839 }
 840
 841 int
 842 physical_doUpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
 843                      int *n, int force)
 844 {
 845   struct physical *p = descriptor2physical(d);
 846   int sets;
 847
 848   sets = 0;
 849   if (p->fd >= 0) {
 850     if (r) {
 851       FD_SET(p->fd, r);
 852       log_Printf(LogTIMER, "%s: fdset(r) %d\n", p->link.name, p->fd);
 853       sets++;
 854     }
 855     if (e) {
 856       FD_SET(p->fd, e);
 857       log_Printf(LogTIMER, "%s: fdset(e) %d\n", p->link.name, p->fd);
 858       sets++;
 859     }
 860     if (w && (force || link_QueueLen(&p->link) || p->out)) {
 861       FD_SET(p->fd, w);
 862       log_Printf(LogTIMER, "%s: fdset(w) %d\n", p->link.name, p->fd);
 863       sets++;
 864     }
 865     if (sets && *n < p->fd + 1)
 866       *n = p->fd + 1;
 867   }
 868
 869   return sets;
 870 }
 871
 872 int
 873 physical_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e)
 874 {
 875   if (p->handler && p->handler->removefromset)
 876     return (*p->handler->removefromset)(p, r, w, e);
 877   else {
 878     int sets;
 879
 880     sets = 0;
 881     if (p->fd >= 0) {
 882       if (r && FD_ISSET(p->fd, r)) {
 883         FD_CLR(p->fd, r);
 884         log_Printf(LogTIMER, "%s: fdunset(r) %d\n", p->link.name, p->fd);
 885         sets++;
 886       }
 887       if (e && FD_ISSET(p->fd, e)) {
 888         FD_CLR(p->fd, e);
 889         log_Printf(LogTIMER, "%s: fdunset(e) %d\n", p->link.name, p->fd);
 890         sets++;
 891       }
 892       if (w && FD_ISSET(p->fd, w)) {
 893         FD_CLR(p->fd, w);
 894         log_Printf(LogTIMER, "%s: fdunset(w) %d\n", p->link.name, p->fd);
 895         sets++;
 896       }
 897     }
 898
 899     return sets;
 900   }
 901 }
 902
 903 int
 904 physical_IsSet(struct fdescriptor *d, const fd_set *fdset)
 905 {
 906   struct physical *p = descriptor2physical(d);
 907   return p->fd >= 0 && FD_ISSET(p->fd, fdset);
 908 }
 909
 910 void
 911 physical_Login(struct physical *p, const char *name)
 912 {
 913   if (p->type == PHYS_DIRECT && *p->name.base && !p->Utmp) {
 914     struct utmp ut;
 915     const char *connstr;
 916     char *colon;
 917
 918     memset(&ut, 0, sizeof ut);
 919     ut.ut_time = time(NULL);
 920     strncpy(ut.ut_name, name, sizeof ut.ut_name);
 921     if (p->handler && (p->handler->type == TCP_DEVICE ||
 922                        p->handler->type == UDP_DEVICE)) {
 923       strncpy(ut.ut_line, PPPOTCPLINE, sizeof ut.ut_line);
 924       strncpy(ut.ut_host, p->name.base, sizeof ut.ut_host);
 925       colon = memchr(ut.ut_host, ':', sizeof ut.ut_host);
 926       if (colon)
 927         *colon = '\0';
 928     } else
 929       strncpy(ut.ut_line, p->name.base, sizeof ut.ut_line);
 930     if ((connstr = getenv("CONNECT")))
 931       /* mgetty sets this to the connection speed */
 932       strncpy(ut.ut_host, connstr, sizeof ut.ut_host);
 933     ID0login(&ut);
 934     p->Utmp = ut.ut_time;
 935   }
 936 }
 937
 938 int
 939 physical_SetMode(struct physical *p, int mode)
 940 {
 941   if ((p->type & (PHYS_DIRECT|PHYS_DEDICATED) ||
 942        mode & (PHYS_DIRECT|PHYS_DEDICATED)) &&
 943       (!(p->type & PHYS_DIRECT) || !(mode & PHYS_BACKGROUND))) {
 944     /* Note:  The -direct -> -background is for callback ! */
 945     log_Printf(LogWARN, "%s: Cannot change mode %s to %s\n", p->link.name,
 946                mode2Nam(p->type), mode2Nam(mode));
 947     return 0;
 948   }
 949   p->type = mode;
 950   return 1;
 951 }
 952
 953 void
 954 physical_DeleteQueue(struct physical *p)
 955 {
 956   if (p->out) {
 957     m_freem(p->out);
 958     p->out = NULL;
 959   }
 960   link_DeleteQueue(&p->link);
 961 }
 962
 963 void
 964 physical_SetDevice(struct physical *p, const char *name)
 965 {
 966   int len = strlen(_PATH_DEV);
 967
 968   if (name != p->name.full) {
 969     strncpy(p->name.full, name, sizeof p->name.full - 1);
 970     p->name.full[sizeof p->name.full - 1] = '\0';
 971   }
 972   p->name.base = *p->name.full == '!' ?  p->name.full + 1 :
 973                  strncmp(p->name.full, _PATH_DEV, len) ?
 974                  p->name.full : p->name.full + len;
 975 }
 976
 977 static void
 978 physical_Found(struct physical *p)
 979 {
 980   FILE *lockfile;
 981   char fn[PATH_MAX];
 982
 983   if (*p->name.full == '/') {
 984     snprintf(fn, sizeof fn, "%s%s.if", _PATH_VARRUN, p->name.base);
 985     lockfile = ID0fopen(fn, "w");
 986     if (lockfile != NULL) {
 987       fprintf(lockfile, "%s%d\n", TUN_NAME, p->dl->bundle->unit);
 988       fclose(lockfile);
 989     }
 990 #ifndef RELEASE_CRUNCH
 991     else
 992       log_Printf(LogALERT, "%s: Can't create %s: %s\n",
 993                  p->link.name, fn, strerror(errno));
 994 #endif
 995   }
 996
 997   throughput_start(&p->link.stats.total, "physical throughput",
 998                    Enabled(p->dl->bundle, OPT_THROUGHPUT));
 999   p->connect_count++;
1000   p->input.sz = 0;
1001
1002   log_Printf(LogPHASE, "%s: Connected!\n", p->link.name);
1003 }
1004
1005 int
1006 physical_Open(struct physical *p)
1007 {
1008   char *dev;
1009   int devno, wasfd, err;
1010   unsigned h;
1011
1012   if (p->fd >= 0)
1013     log_Printf(LogDEBUG, "%s: Open: Modem is already open!\n", p->link.name);
1014     /* We're going back into "term" mode */
1015   else if (p->type == PHYS_DIRECT) {
1016     physical_SetDevice(p, "");
1017     p->fd = STDIN_FILENO;
1018     for (h = 0; h < NDEVICES && p->handler == NULL && p->fd >= 0; h++)
1019       p->handler = (*devices[h].create)(p);
1020     if (p->fd >= 0) {
1021       if (p->handler == NULL) {
1022         physical_SetupStack(p, "unknown", PHYSICAL_NOFORCE);
1023         log_Printf(LogDEBUG, "%s: stdin is unidentified\n", p->link.name);
1024       }
1025       physical_Found(p);
1026     }
1027   } else {
1028     dev = p->cfg.devlist;
1029     devno = 0;
1030     while (devno < p->cfg.ndev && p->fd < 0) {
1031       physical_SetDevice(p, dev);
1032       if (physical_Lock(p)) {
1033         err = 0;
1034
1035         if (*p->name.full == '/') {
1036           p->fd = ID0open(p->name.full, O_RDWR | O_NONBLOCK);
1037           if (p->fd < 0)
1038             err = errno;
1039         }
1040
1041         wasfd = p->fd;
1042         for (h = 0; h < NDEVICES && p->handler == NULL; h++)
1043           if ((p->handler = (*devices[h].create)(p)) == NULL && wasfd != p->fd)
1044             break;
1045
1046         if (p->fd < 0) {
1047           if (h == NDEVICES) {
1048             if (err)
1049               log_Printf(LogWARN, "%s: %s: %s\n", p->link.name, p->name.full,
1050                          strerror(errno));
1051             else
1052               log_Printf(LogWARN, "%s: Device (%s) must begin with a '/',"
1053                          " a '!' or contain at least one ':'\n", p->link.name,
1054                          p->name.full);
1055           }
1056           physical_Unlock(p);
1057         } else
1058           physical_Found(p);
1059       }
1060       dev += strlen(dev) + 1;
1061       devno++;
1062     }
1063   }
1064
1065   return p->fd;
1066 }
1067
1068 void
1069 physical_SetupStack(struct physical *p, const char *who, int how)
1070 {
1071   link_EmptyStack(&p->link);
1072   if (how == PHYSICAL_FORCE_SYNC || how == PHYSICAL_FORCE_SYNCNOACF ||
1073       (how == PHYSICAL_NOFORCE && physical_IsSync(p)))
1074     link_Stack(&p->link, &synclayer);
1075   else {
1076     link_Stack(&p->link, &asynclayer);
1077     link_Stack(&p->link, &hdlclayer);
1078   }
1079   if (how != PHYSICAL_FORCE_SYNCNOACF)
1080     link_Stack(&p->link, &acflayer);
1081   link_Stack(&p->link, &protolayer);
1082   link_Stack(&p->link, &lqrlayer);
1083   link_Stack(&p->link, &ccplayer);
1084   link_Stack(&p->link, &vjlayer);
1085   link_Stack(&p->link, &tcpmsslayer);
1086 #ifndef NONAT
1087   link_Stack(&p->link, &natlayer);
1088 #endif
1089   if (how == PHYSICAL_FORCE_ASYNC && physical_IsSync(p)) {
1090     log_Printf(LogWARN, "Sync device setting ignored for ``%s'' device\n", who);
1091     p->cfg.speed = MODEM_SPEED;
1092   } else if (how == PHYSICAL_FORCE_SYNC && !physical_IsSync(p)) {
1093     log_Printf(LogWARN, "Async device setting ignored for ``%s'' device\n",
1094                who);
1095     physical_SetSync(p);
1096   }
1097 }
1098
1099 void
1100 physical_StopDeviceTimer(struct physical *p)
1101 {
1102   if (p->handler && p->handler->stoptimer)
1103     (*p->handler->stoptimer)(p);
1104 }
1105
1106 int
1107 physical_AwaitCarrier(struct physical *p)
1108 {
1109   if (p->handler && p->handler->awaitcarrier)
1110     return (*p->handler->awaitcarrier)(p);
1111
1112   return CARRIER_OK;
1113 }
1114
1115
1116 void
1117 physical_SetAsyncParams(struct physical *p, u_int32_t mymap, u_int32_t hismap)
1118 {
1119   if (p->handler && p->handler->setasyncparams)
1120     return (*p->handler->setasyncparams)(p, mymap, hismap);
1121
1122   async_SetLinkParams(&p->async, mymap, hismap);
1123 }
1124
1125 int
1126 physical_Slot(struct physical *p)
1127 {
1128   if (p->handler && p->handler->slot)
1129     return (*p->handler->slot)(p);
1130
1131   return -1;
1132 }
1133
1134 int
1135 physical_SetPPPoEnonstandard(struct physical *p, int enable)
1136 {
1137    p->cfg.nonstandard_pppoe = enable ? 1 : 0;
1138    p->cfg.pppoe_configured = 1;
1139    return 1;
1140 }