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/time.h>
  29 #include <sys/un.h>
  30
  31 #include <errno.h>
  32 #include <fcntl.h>
  33 #include <paths.h>
  34 #ifdef NOSUID
  35 #include <signal.h>
  36 #endif
  37 #include <stdarg.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <sys/uio.h>
  42 #include <sysexits.h>
  43 #include <termios.h>
  44 #include <time.h>
  45 #include <unistd.h>
  46 #include <utmpx.h>
  47 #if defined(__OpenBSD__) || defined(__NetBSD__)
  48 #include <sys/ioctl.h>
  49 #include <util.h>
  50 #else
  51 #include <libutil.h>
  52 #endif
  53
  54 #include "layer.h"
  55 #ifndef NONAT
  56 #include "nat_cmd.h"
  57 #endif
  58 #include "proto.h"
  59 #include "acf.h"
  60 #include "vjcomp.h"
  61 #include "defs.h"
  62 #include "command.h"
  63 #include "mbuf.h"
  64 #include "log.h"
  65 #include "id.h"
  66 #include "timer.h"
  67 #include "fsm.h"
  68 #include "lqr.h"
  69 #include "hdlc.h"
  70 #include "lcp.h"
  71 #include "throughput.h"
  72 #include "sync.h"
  73 #include "async.h"
  74 #include "iplist.h"
  75 #include "slcompress.h"
  76 #include "ncpaddr.h"
  77 #include "ipcp.h"
  78 #include "filter.h"
  79 #include "descriptor.h"
  80 #include "ccp.h"
  81 #include "link.h"
  82 #include "physical.h"
  83 #include "mp.h"
  84 #ifndef NORADIUS
  85 #include "radius.h"
  86 #endif
  87 #include "ipv6cp.h"
  88 #include "ncp.h"
  89 #include "bundle.h"
  90 #include "prompt.h"
  91 #include "chat.h"
  92 #include "auth.h"
  93 #include "main.h"
  94 #include "chap.h"
  95 #include "cbcp.h"
  96 #include "datalink.h"
  97 #include "tcp.h"
  98 #include "udp.h"
  99 #include "exec.h"
 100 #include "tty.h"
 101 #ifndef NONETGRAPH
 102 #include "ether.h"
 103 #include "netgraph.h"
 104 #endif
 105 #ifndef NOATM
 106 #include "atm.h"
 107 #endif
 108 #include "tcpmss.h"
 109
 110 static int physical_DescriptorWrite(struct fdescriptor *, struct bundle *,
 111                                     const fd_set *);
 112
 113 static unsigned
 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   unsigned (*DeviceSize)(void);
 124 } devices[] = {
 125   { tty_Create, tty_iov2device, tty_DeviceSize },
 126 #ifndef NONETGRAPH
 127   /*
 128    * This must come before ``udp'' so that the probe routine is
 129    * able to identify it as a more specific type of SOCK_DGRAM.
 130    */
 131   { ether_Create, ether_iov2device, ether_DeviceSize },
 132 #ifdef EXPERIMENTAL_NETGRAPH
 133   { ng_Create, ng_iov2device, ng_DeviceSize },
 134 #endif
 135 #endif
 136 #ifndef NOATM
 137   /* Ditto for ATM devices */
 138   { atm_Create, atm_iov2device, atm_DeviceSize },
 139 #endif
 140   { tcp_Create, tcp_iov2device, tcp_DeviceSize },
 141   { udp_Create, udp_iov2device, udp_DeviceSize },
 142   { exec_Create, exec_iov2device, exec_DeviceSize }
 143 };
 144
 145 #define NDEVICES (sizeof devices / sizeof devices[0])
 146
 147 static int
 148 physical_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
 149                    int *n)
 150 {
 151   return physical_doUpdateSet(d, r, w, e, n, 0);
 152 }
 153
 154 void
 155 physical_SetDescriptor(struct physical *p)
 156 {
 157   p->desc.type = PHYSICAL_DESCRIPTOR;
 158   p->desc.UpdateSet = physical_UpdateSet;
 159   p->desc.IsSet = physical_IsSet;
 160   p->desc.Read = physical_DescriptorRead;
 161   p->desc.Write = physical_DescriptorWrite;
 162 }
 163
 164 struct physical *
 165 physical_Create(struct datalink *dl, int type)
 166 {
 167   struct physical *p;
 168
 169   p = (struct physical *)malloc(sizeof(struct physical));
 170   if (!p)
 171     return NULL;
 172
 173   p->link.type = PHYSICAL_LINK;
 174   p->link.name = dl->name;
 175   p->link.len = sizeof *p;
 176
 177   /* The sample period is fixed - see physical2iov() & iov2physical() */
 178   throughput_init(&p->link.stats.total, SAMPLE_PERIOD);
 179   p->link.stats.parent = dl->bundle->ncp.mp.active ?
 180     &dl->bundle->ncp.mp.link.stats.total : NULL;
 181   p->link.stats.gather = 1;
 182
 183   memset(p->link.Queue, '\0', sizeof p->link.Queue);
 184   memset(p->link.proto_in, '\0', sizeof p->link.proto_in);
 185   memset(p->link.proto_out, '\0', sizeof p->link.proto_out);
 186   link_EmptyStack(&p->link);
 187
 188   p->handler = NULL;
 189   physical_SetDescriptor(p);
 190   p->type = type;
 191
 192   hdlc_Init(&p->hdlc, &p->link.lcp);
 193   async_Init(&p->async);
 194
 195   p->fd = -1;
 196   p->out = NULL;
 197   p->connect_count = 0;
 198   p->dl = dl;
 199   p->input.sz = 0;
 200   *p->name.full = '\0';
 201   p->name.base = p->name.full;
 202
 203   p->Utmp = 0;
 204   p->session_owner = (pid_t)-1;
 205
 206   p->cfg.rts_cts = MODEM_CTSRTS;
 207   p->cfg.speed = MODEM_SPEED;
 208   p->cfg.parity = CS8;
 209   memcpy(p->cfg.devlist, MODEM_LIST, sizeof MODEM_LIST);
 210   p->cfg.ndev = NMODEMS;
 211   p->cfg.cd.necessity = CD_DEFAULT;
 212   p->cfg.cd.delay = 0;          /* reconfigured or device specific default */
 213
 214   lcp_Init(&p->link.lcp, dl->bundle, &p->link, &dl->fsmp);
 215   ccp_Init(&p->link.ccp, dl->bundle, &p->link, &dl->fsmp);
 216
 217   return p;
 218 }
 219
 220 static const struct parity {
 221   const char *name;
 222   const char *name1;
 223   int set;
 224 } validparity[] = {
 225   { "even", "P_EVEN", CS7 | PARENB },
 226   { "odd", "P_ODD", CS7 | PARENB | PARODD },
 227   { "none", "P_ZERO", CS8 },
 228   { NULL, NULL, 0 },
 229 };
 230
 231 static int
 232 GetParityValue(const char *str)
 233 {
 234   const struct parity *pp;
 235
 236   for (pp = validparity; pp->name; pp++) {
 237     if (strcasecmp(pp->name, str) == 0 ||
 238         strcasecmp(pp->name1, str) == 0) {
 239       return pp->set;
 240     }
 241   }
 242   return (-1);
 243 }
 244
 245 int
 246 physical_SetParity(struct physical *p, const char *str)
 247 {
 248   struct termios rstio;
 249   int val;
 250
 251   val = GetParityValue(str);
 252   if (val > 0) {
 253     p->cfg.parity = val;
 254     if (p->fd >= 0) {
 255       tcgetattr(p->fd, &rstio);
 256       rstio.c_cflag &= ~(CSIZE | PARODD | PARENB);
 257       rstio.c_cflag |= val;
 258       tcsetattr(p->fd, TCSADRAIN, &rstio);
 259     }
 260     return 0;
 261   }
 262   log_Printf(LogWARN, "%s: %s: Invalid parity\n", p->link.name, str);
 263   return -1;
 264 }
 265
 266 unsigned
 267 physical_GetSpeed(struct physical *p)
 268 {
 269   if (p->handler && p->handler->speed)
 270     return (*p->handler->speed)(p);
 271
 272   return 0;
 273 }
 274
 275 int
 276 physical_SetSpeed(struct physical *p, unsigned speed)
 277 {
 278   if (UnsignedToSpeed(speed) != B0) {
 279       p->cfg.speed = speed;
 280       return 1;
 281   }
 282
 283   return 0;
 284 }
 285
 286 int
 287 physical_Raw(struct physical *p)
 288 {
 289   if (p->handler && p->handler->raw)
 290     return (*p->handler->raw)(p);
 291
 292   return 1;
 293 }
 294
 295 void
 296 physical_Offline(struct physical *p)
 297 {
 298   if (p->handler && p->handler->offline)
 299     (*p->handler->offline)(p);
 300   log_Printf(LogPHASE, "%s: Disconnected!\n", p->link.name);
 301 }
 302
 303 static int
 304 physical_Lock(struct physical *p)
 305 {
 306   int res;
 307
 308   if (*p->name.full == '/' && p->type != PHYS_DIRECT &&
 309       (res = ID0uu_lock(p->name.base)) != UU_LOCK_OK) {
 310     if (res == UU_LOCK_INUSE)
 311       log_Printf(LogPHASE, "%s: %s is in use\n", p->link.name, p->name.full);
 312     else
 313       log_Printf(LogPHASE, "%s: %s is in use: uu_lock: %s\n",
 314                  p->link.name, p->name.full, uu_lockerr(res));
 315     return 0;
 316   }
 317
 318   return 1;
 319 }
 320
 321 static void
 322 physical_Unlock(struct physical *p)
 323 {
 324   if (*p->name.full == '/' && p->type != PHYS_DIRECT &&
 325       ID0uu_unlock(p->name.base) == -1)
 326     log_Printf(LogALERT, "%s: Can't uu_unlock %s\n", p->link.name,
 327                p->name.base);
 328 }
 329
 330 void
 331 physical_Close(struct physical *p)
 332 {
 333   int newsid;
 334   char fn[PATH_MAX];
 335   struct utmpx ut;
 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     memset(&ut, 0, sizeof ut);
 348     ut.ut_type = DEAD_PROCESS;
 349     gettimeofday(&ut.ut_tv, NULL);
 350     snprintf(ut.ut_id, sizeof ut.ut_id, "%xppp", (int)getpid());
 351     ID0logout(&ut);
 352     p->Utmp = 0;
 353   }
 354   newsid = tcgetpgrp(p->fd) == getpgrp();
 355   close(p->fd);
 356   p->fd = -1;
 357   log_SetTtyCommandMode(p->dl);
 358
 359   throughput_stop(&p->link.stats.total);
 360   throughput_log(&p->link.stats.total, LogPHASE, p->link.name);
 361
 362   if (p->session_owner != (pid_t)-1) {
 363     log_Printf(LogPHASE, "%s: HUPing %ld\n", p->link.name,
 364                (long)p->session_owner);
 365     ID0kill(p->session_owner, SIGHUP);
 366     p->session_owner = (pid_t)-1;
 367   }
 368
 369   if (newsid)
 370     bundle_setsid(p->dl->bundle, 0);
 371
 372   if (*p->name.full == '/') {
 373     snprintf(fn, sizeof fn, "%s%s.if", _PATH_VARRUN, p->name.base);
 374 #ifndef RELEASE_CRUNCH
 375     if (ID0unlink(fn) == -1)
 376       log_Printf(LogALERT, "%s: Can't remove %s: %s\n",
 377                  p->link.name, fn, strerror(errno));
 378 #else
 379     ID0unlink(fn);
 380 #endif
 381   }
 382   physical_Unlock(p);
 383   if (p->handler && p->handler->destroy)
 384     (*p->handler->destroy)(p);
 385   p->handler = NULL;
 386   p->name.base = p->name.full;
 387   *p->name.full = '\0';
 388 }
 389
 390 void
 391 physical_Destroy(struct physical *p)
 392 {
 393   physical_Close(p);
 394   throughput_destroy(&p->link.stats.total);
 395   free(p);
 396 }
 397
 398 static int
 399 physical_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle __unused,
 400                          const fd_set *fdset __unused)
 401 {
 402   struct physical *p = descriptor2physical(d);
 403   int nw, result = 0;
 404
 405   if (p->out == NULL)
 406     p->out = link_Dequeue(&p->link);
 407
 408   if (p->out) {
 409     nw = physical_Write(p, MBUF_CTOP(p->out), p->out->m_len);
 410     log_Printf(LogDEBUG, "%s: DescriptorWrite: wrote %d(%lu) to %d\n",
 411                p->link.name, nw, (unsigned long)p->out->m_len, p->fd);
 412     if (nw > 0) {
 413       p->out->m_len -= nw;
 414       p->out->m_offset += nw;
 415       if (p->out->m_len == 0)
 416         p->out = m_free(p->out);
 417       result = 1;
 418     } else if (nw < 0) {
 419       if (errno == EAGAIN)
 420         result = 1;
 421       else if (errno != ENOBUFS) {
 422         log_Printf(LogPHASE, "%s: write (fd %d, len %zd): %s\n", p->link.name,
 423                    p->fd, p->out->m_len, strerror(errno));
 424         datalink_Down(p->dl, CLOSE_NORMAL);
 425       }
 426     }
 427     /* else we shouldn't really have been called !  select() is broken ! */
 428   }
 429
 430   return result;
 431 }
 432
 433 int
 434 physical_ShowStatus(struct cmdargs const *arg)
 435 {
 436   struct physical *p = arg->cx->physical;
 437   struct cd *cd;
 438   const char *dev;
 439   int n, slot;
 440
 441   prompt_Printf(arg->prompt, "Name: %s\n", p->link.name);
 442   prompt_Printf(arg->prompt, " State:           ");
 443   if (p->fd < 0)
 444     prompt_Printf(arg->prompt, "closed\n");
 445   else {
 446     slot = physical_Slot(p);
 447     if (p->handler && p->handler->openinfo) {
 448       if (slot == -1)
 449         prompt_Printf(arg->prompt, "open (%s)\n", (*p->handler->openinfo)(p));
 450       else
 451         prompt_Printf(arg->prompt, "open (%s, port %d)\n",
 452                       (*p->handler->openinfo)(p), slot);
 453     } else if (slot == -1)
 454       prompt_Printf(arg->prompt, "open\n");
 455     else
 456       prompt_Printf(arg->prompt, "open (port %d)\n", slot);
 457   }
 458
 459   prompt_Printf(arg->prompt, " Device:          %s",
 460                 *p->name.full ?  p->name.full :
 461                 p->type == PHYS_DIRECT ? "unknown" : "N/A");
 462   if (p->session_owner != (pid_t)-1)
 463     prompt_Printf(arg->prompt, " (session owner: %ld)", (long)p->session_owner);
 464
 465   prompt_Printf(arg->prompt, "\n Link Type:       %s\n", mode2Nam(p->type));
 466   prompt_Printf(arg->prompt, " Connect Count:   %d\n", p->connect_count);
 467 #ifdef TIOCOUTQ
 468   if (p->fd >= 0 && ioctl(p->fd, TIOCOUTQ, &n) >= 0)
 469       prompt_Printf(arg->prompt, " Physical outq:   %d\n", n);
 470 #endif
 471
 472   prompt_Printf(arg->prompt, " Queued Packets:  %lu\n",
 473                 (u_long)link_QueueLen(&p->link));
 474   prompt_Printf(arg->prompt, " Phone Number:    %s\n", arg->cx->phone.chosen);
 475
 476   prompt_Printf(arg->prompt, "\nDefaults:\n");
 477
 478   prompt_Printf(arg->prompt, " Device List:     ");
 479   dev = p->cfg.devlist;
 480   for (n = 0; n < p->cfg.ndev; n++) {
 481     if (n)
 482       prompt_Printf(arg->prompt, ", ");
 483     prompt_Printf(arg->prompt, "\"%s\"", dev);
 484     dev += strlen(dev) + 1;
 485   }
 486
 487   prompt_Printf(arg->prompt, "\n Characteristics: ");
 488   if (physical_IsSync(arg->cx->physical))
 489     prompt_Printf(arg->prompt, "sync");
 490   else
 491     prompt_Printf(arg->prompt, "%dbps", p->cfg.speed);
 492
 493   switch (p->cfg.parity & CSIZE) {
 494   case CS7:
 495     prompt_Printf(arg->prompt, ", cs7");
 496     break;
 497   case CS8:
 498     prompt_Printf(arg->prompt, ", cs8");
 499     break;
 500   }
 501   if (p->cfg.parity & PARENB) {
 502     if (p->cfg.parity & PARODD)
 503       prompt_Printf(arg->prompt, ", odd parity");
 504     else
 505       prompt_Printf(arg->prompt, ", even parity");
 506   } else
 507     prompt_Printf(arg->prompt, ", no parity");
 508
 509   prompt_Printf(arg->prompt, ", CTS/RTS %s\n", (p->cfg.rts_cts ? "on" : "off"));
 510
 511   prompt_Printf(arg->prompt, " CD check delay:  ");
 512   cd = p->handler ? &p->handler->cd : &p->cfg.cd;
 513   if (cd->necessity == CD_NOTREQUIRED)
 514     prompt_Printf(arg->prompt, "no cd");
 515   else if (p->cfg.cd.necessity == CD_DEFAULT) {
 516     prompt_Printf(arg->prompt, "device specific");
 517   } else {
 518     prompt_Printf(arg->prompt, "%d second%s", p->cfg.cd.delay,
 519                   p->cfg.cd.delay == 1 ? "" : "s");
 520     if (p->cfg.cd.necessity == CD_REQUIRED)
 521       prompt_Printf(arg->prompt, " (required!)");
 522   }
 523   prompt_Printf(arg->prompt, "\n\n");
 524
 525   throughput_disp(&p->link.stats.total, arg->prompt);
 526
 527   return 0;
 528 }
 529
 530 void
 531 physical_DescriptorRead(struct fdescriptor *d, struct bundle *bundle,
 532                      const fd_set *fdset __unused)
 533 {
 534   struct physical *p = descriptor2physical(d);
 535   u_char *rbuff;
 536   int n, found;
 537
 538   rbuff = p->input.buf + p->input.sz;
 539
 540   /* something to read */
 541   n = physical_Read(p, rbuff, sizeof p->input.buf - p->input.sz);
 542   log_Printf(LogDEBUG, "%s: DescriptorRead: read %d/%d from %d\n",
 543              p->link.name, n, (int)(sizeof p->input.buf - p->input.sz), p->fd);
 544   if (n <= 0) {
 545     if (n < 0)
 546       log_Printf(LogPHASE, "%s: read (%d): %s\n", p->link.name, p->fd,
 547                  strerror(errno));
 548     else
 549       log_Printf(LogPHASE, "%s: read (%d): Got zero bytes\n",
 550                  p->link.name, p->fd);
 551     datalink_Down(p->dl, CLOSE_NORMAL);
 552     return;
 553   }
 554
 555   rbuff -= p->input.sz;
 556   n += p->input.sz;
 557
 558   if (p->link.lcp.fsm.state <= ST_CLOSED) {
 559     if (p->type != PHYS_DEDICATED) {
 560       found = hdlc_Detect((u_char const **)&rbuff, n, physical_IsSync(p));
 561       if (rbuff != p->input.buf)
 562         log_WritePrompts(p->dl, "%.*s", (int)(rbuff - p->input.buf),
 563                          p->input.buf);
 564       p->input.sz = n - (rbuff - p->input.buf);
 565
 566       if (found) {
 567         /* LCP packet is detected. Turn ourselves into packet mode */
 568         log_Printf(LogPHASE, "%s: PPP packet detected, coming up\n",
 569                    p->link.name);
 570         log_SetTtyCommandMode(p->dl);
 571         datalink_Up(p->dl, 0, 1);
 572         link_PullPacket(&p->link, rbuff, p->input.sz, bundle);
 573         p->input.sz = 0;
 574       } else
 575         bcopy(rbuff, p->input.buf, p->input.sz);
 576     } else
 577       /* In -dedicated mode, we just discard input until LCP is started */
 578       p->input.sz = 0;
 579   } else if (n > 0)
 580     link_PullPacket(&p->link, rbuff, n, bundle);
 581 }
 582
 583 struct physical *
 584 iov2physical(struct datalink *dl, struct iovec *iov, int *niov, int maxiov,
 585              int fd, int *auxfd, int *nauxfd)
 586 {
 587   struct physical *p;
 588   int type;
 589   unsigned h;
 590
 591   p = (struct physical *)iov[(*niov)++].iov_base;
 592   p->link.name = dl->name;
 593   memset(p->link.Queue, '\0', sizeof p->link.Queue);
 594
 595   p->desc.UpdateSet = physical_UpdateSet;
 596   p->desc.IsSet = physical_IsSet;
 597   p->desc.Read = physical_DescriptorRead;
 598   p->desc.Write = physical_DescriptorWrite;
 599   p->type = PHYS_DIRECT;
 600   p->dl = dl;
 601   p->out = NULL;
 602   p->connect_count = 1;
 603
 604   physical_SetDevice(p, p->name.full);
 605
 606   p->link.lcp.fsm.bundle = dl->bundle;
 607   p->link.lcp.fsm.link = &p->link;
 608   memset(&p->link.lcp.fsm.FsmTimer, '\0', sizeof p->link.lcp.fsm.FsmTimer);
 609   memset(&p->link.lcp.fsm.OpenTimer, '\0', sizeof p->link.lcp.fsm.OpenTimer);
 610   memset(&p->link.lcp.fsm.StoppedTimer, '\0',
 611          sizeof p->link.lcp.fsm.StoppedTimer);
 612   p->link.lcp.fsm.parent = &dl->fsmp;
 613   lcp_SetupCallbacks(&p->link.lcp);
 614
 615   p->link.ccp.fsm.bundle = dl->bundle;
 616   p->link.ccp.fsm.link = &p->link;
 617   /* Our in.state & out.state are NULL (no link-level ccp yet) */
 618   memset(&p->link.ccp.fsm.FsmTimer, '\0', sizeof p->link.ccp.fsm.FsmTimer);
 619   memset(&p->link.ccp.fsm.OpenTimer, '\0', sizeof p->link.ccp.fsm.OpenTimer);
 620   memset(&p->link.ccp.fsm.StoppedTimer, '\0',
 621          sizeof p->link.ccp.fsm.StoppedTimer);
 622   p->link.ccp.fsm.parent = &dl->fsmp;
 623   ccp_SetupCallbacks(&p->link.ccp);
 624
 625   p->hdlc.lqm.owner = &p->link.lcp;
 626   p->hdlc.ReportTimer.state = TIMER_STOPPED;
 627   p->hdlc.lqm.timer.state = TIMER_STOPPED;
 628
 629   p->fd = fd;
 630   p->link.stats.total.in.SampleOctets = (long long *)iov[(*niov)++].iov_base;
 631   p->link.stats.total.out.SampleOctets = (long long *)iov[(*niov)++].iov_base;
 632   p->link.stats.parent = dl->bundle->ncp.mp.active ?
 633     &dl->bundle->ncp.mp.link.stats.total : NULL;
 634   p->link.stats.gather = 1;
 635
 636   type = (long)p->handler;
 637   p->handler = NULL;
 638   for (h = 0; h < NDEVICES && p->handler == NULL; h++)
 639     p->handler = (*devices[h].iov2device)(type, p, iov, niov, maxiov,
 640                                           auxfd, nauxfd);
 641   if (p->handler == NULL) {
 642     log_Printf(LogPHASE, "%s: Unknown link type\n", p->link.name);
 643     free(iov[(*niov)++].iov_base);
 644     physical_SetupStack(p, "unknown", PHYSICAL_NOFORCE);
 645   } else
 646     log_Printf(LogPHASE, "%s: Device %s, link type is %s\n",
 647                p->link.name, p->name.full, p->handler->name);
 648
 649   if (p->hdlc.lqm.method && p->hdlc.lqm.timer.load)
 650     lqr_reStart(&p->link.lcp);
 651   hdlc_StartTimer(&p->hdlc);
 652
 653   throughput_restart(&p->link.stats.total, "physical throughput",
 654                      Enabled(dl->bundle, OPT_THROUGHPUT));
 655
 656   return p;
 657 }
 658
 659 unsigned
 660 physical_MaxDeviceSize()
 661 {
 662   unsigned biggest, sz, n;
 663
 664   biggest = sizeof(struct device);
 665   for (n = 0; n < NDEVICES; n++)
 666     if (devices[n].DeviceSize) {
 667       sz = (*devices[n].DeviceSize)();
 668       if (biggest < sz)
 669         biggest = sz;
 670     }
 671
 672   return biggest;
 673 }
 674
 675 int
 676 physical2iov(struct physical *p, struct iovec *iov, int *niov, int maxiov,
 677              int *auxfd, int *nauxfd)
 678 {
 679   struct device *h;
 680   int sz;
 681
 682   h = NULL;
 683   if (p) {
 684     hdlc_StopTimer(&p->hdlc);
 685     lqr_StopTimer(p);
 686     timer_Stop(&p->link.lcp.fsm.FsmTimer);
 687     timer_Stop(&p->link.ccp.fsm.FsmTimer);
 688     timer_Stop(&p->link.lcp.fsm.OpenTimer);
 689     timer_Stop(&p->link.ccp.fsm.OpenTimer);
 690     timer_Stop(&p->link.lcp.fsm.StoppedTimer);
 691     timer_Stop(&p->link.ccp.fsm.StoppedTimer);
 692     if (p->handler) {
 693       h = p->handler;
 694       p->handler = (struct device *)(long)p->handler->type;
 695     }
 696
 697     if (Enabled(p->dl->bundle, OPT_KEEPSESSION) ||
 698         tcgetpgrp(p->fd) == getpgrp())
 699       p->session_owner = getpid();      /* So I'll eventually get HUP'd */
 700     else
 701       p->session_owner = (pid_t)-1;
 702     timer_Stop(&p->link.stats.total.Timer);
 703   }
 704
 705   if (*niov + 2 >= maxiov) {
 706     log_Printf(LogERROR, "physical2iov: No room for physical + throughput"
 707                " + device !\n");
 708     if (p)
 709       free(p);
 710     return -1;
 711   }
 712
 713   iov[*niov].iov_base = (void *)p;
 714   iov[*niov].iov_len = sizeof *p;
 715   (*niov)++;
 716
 717   iov[*niov].iov_base = p ? (void *)p->link.stats.total.in.SampleOctets : NULL;
 718   iov[*niov].iov_len = SAMPLE_PERIOD * sizeof(long long);
 719   (*niov)++;
 720   iov[*niov].iov_base = p ? (void *)p->link.stats.total.out.SampleOctets : NULL;
 721   iov[*niov].iov_len = SAMPLE_PERIOD * sizeof(long long);
 722   (*niov)++;
 723
 724   sz = physical_MaxDeviceSize();
 725   if (p) {
 726     if (h && h->device2iov)
 727       (*h->device2iov)(h, iov, niov, maxiov, auxfd, nauxfd);
 728     else {
 729       if ((iov[*niov].iov_base = malloc(sz)) == NULL) {
 730         log_Printf(LogALERT, "physical2iov: Out of memory (%d bytes)\n", sz);
 731         AbortProgram(EX_OSERR);
 732       }
 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 *physical_GetDevice(struct physical *p)
 780 {
 781    return p->name.full;
 782 }
 783
 784 void
 785 physical_SetDeviceList(struct physical *p, int argc, const char *const *argv)
 786 {
 787   unsigned pos;
 788   int f;
 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 utmpx ut;
 913     const char *connstr;
 914     char *colon;
 915
 916     memset(&ut, 0, sizeof ut);
 917     ut.ut_type = USER_PROCESS;
 918     gettimeofday(&ut.ut_tv, NULL);
 919     snprintf(ut.ut_id, sizeof ut.ut_id, "%xppp", (int)getpid());
 920     strncpy(ut.ut_user, name, sizeof ut.ut_user);
 921     if (p->handler && (p->handler->type == TCP_DEVICE ||
 922                        p->handler->type == UDP_DEVICE)) {
 923       strncpy(ut.ut_host, p->name.base, sizeof ut.ut_host);
 924       colon = memchr(ut.ut_host, ':', sizeof ut.ut_host);
 925       if (colon)
 926         *colon = '\0';
 927     } else
 928       strncpy(ut.ut_line, p->name.base, sizeof ut.ut_line);
 929     if ((connstr = getenv("CONNECT")))
 930       /* mgetty sets this to the connection speed */
 931       strncpy(ut.ut_host, connstr, sizeof ut.ut_host);
 932     ID0login(&ut);
 933     p->Utmp = 1;
 934   }
 935 }
 936
 937 int
 938 physical_SetMode(struct physical *p, int mode)
 939 {
 940   if ((p->type & (PHYS_DIRECT|PHYS_DEDICATED) ||
 941        mode & (PHYS_DIRECT|PHYS_DEDICATED)) &&
 942       (!(p->type & PHYS_DIRECT) || !(mode & PHYS_BACKGROUND))) {
 943     /* Note:  The -direct -> -background is for callback ! */
 944     log_Printf(LogWARN, "%s: Cannot change mode %s to %s\n", p->link.name,
 945                mode2Nam(p->type), mode2Nam(mode));
 946     return 0;
 947   }
 948   p->type = mode;
 949   return 1;
 950 }
 951
 952 void
 953 physical_DeleteQueue(struct physical *p)
 954 {
 955   if (p->out) {
 956     m_freem(p->out);
 957     p->out = NULL;
 958   }
 959   link_DeleteQueue(&p->link);
 960 }
 961
 962 void
 963 physical_SetDevice(struct physical *p, const char *name)
 964 {
 965   int len = strlen(_PATH_DEV);
 966
 967   if (name != p->name.full) {
 968     strncpy(p->name.full, name, sizeof p->name.full - 1);
 969     p->name.full[sizeof p->name.full - 1] = '\0';
 970   }
 971   p->name.base = *p->name.full == '!' ?  p->name.full + 1 :
 972                  strncmp(p->name.full, _PATH_DEV, len) ?
 973                  p->name.full : p->name.full + len;
 974 }
 975
 976 static void
 977 physical_Found(struct physical *p)
 978 {
 979   FILE *lockfile;
 980   char fn[PATH_MAX];
 981
 982   if (*p->name.full == '/') {
 983     snprintf(fn, sizeof fn, "%s%s.if", _PATH_VARRUN, p->name.base);
 984     lockfile = ID0fopen(fn, "w");
 985     if (lockfile != NULL) {
 986       fprintf(lockfile, "%s%d\n", TUN_NAME, p->dl->bundle->unit);
 987       fclose(lockfile);
 988     }
 989 #ifndef RELEASE_CRUNCH
 990     else
 991       log_Printf(LogALERT, "%s: Can't create %s: %s\n",
 992                  p->link.name, fn, strerror(errno));
 993 #endif
 994   }
 995
 996   throughput_start(&p->link.stats.total, "physical throughput",
 997                    Enabled(p->dl->bundle, OPT_THROUGHPUT));
 998   p->connect_count++;
 999   p->input.sz = 0;
1000
1001   log_Printf(LogPHASE, "%s: Connected!\n", p->link.name);
1002 }
1003
1004 int
1005 physical_Open(struct physical *p)
1006 {
1007   char *dev;
1008   int devno, wasfd, err;
1009   unsigned h;
1010
1011   if (p->fd >= 0)
1012     log_Printf(LogDEBUG, "%s: Open: Modem is already open!\n", p->link.name);
1013     /* We're going back into "term" mode */
1014   else if (p->type == PHYS_DIRECT) {
1015     physical_SetDevice(p, "");
1016     p->fd = STDIN_FILENO;
1017     for (h = 0; h < NDEVICES && p->handler == NULL && p->fd >= 0; h++)
1018       p->handler = (*devices[h].create)(p);
1019     close(STDOUT_FILENO);
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 }