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