pppd/sys-NeXT.c

   1 /*
   2  * sys-next.c - System-dependent procedures for setting up
   3  * PPP interfaces on NeXT 3.2/3.3  systems
   4  *
   5  * Copyright (c) 1994 Philippe-Andre Prindeville.
   6  * All rights reserved.
   7  *
   8  * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  *
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in
  19  *    the documentation and/or other materials provided with the
  20  *    distribution.
  21  *
  22  * 3. The name "Carnegie Mellon University" must not be used to
  23  *    endorse or promote products derived from this software without
  24  *    prior written permission. For permission or any legal
  25  *    details, please contact
  26  *      Office of Technology Transfer
  27  *      Carnegie Mellon University
  28  *      5000 Forbes Avenue
  29  *      Pittsburgh, PA  15213-3890
  30  *      (412) 268-4387, fax: (412) 268-7395
  31  *      tech-transfer@andrew.cmu.edu
  32  *
  33  * 4. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by Computing Services
  36  *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
  37  *
  38  * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
  39  * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  40  * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
  41  * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  42  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
  43  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  44  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  45  */
  46
  47 #define RCSID   "$Id: sys-NeXT.c,v 1.21 2002/12/04 23:03:32 paulus Exp $"
  48
  49 #include <stdio.h>
  50 #include <termios.h>
  51 #include <utmp.h>
  52 #include <unistd.h>
  53 #include <stdlib.h>
  54 #include <libc.h>
  55 #include <strings.h>
  56 #include <sys/types.h>
  57 #include <sys/file.h>
  58 #include <sys/socket.h>
  59 #include <sys/ioctl.h>
  60 #include <sys/time.h>
  61 #include <sys/errno.h>
  62 #include <sys/stat.h>
  63 #include <sys/fcntl.h>
  64
  65 #include <net/if.h>
  66 #include <net/ppp_defs.h>
  67 #include <net/if_ppp.h>
  68 #include <netdb.h>
  69 #include <netinet/in.h>
  70 #include <netinet/in_systm.h>
  71 #include <netinet/in_var.h>
  72 #if !(NS_TARGET >= 40)
  73 /* XXX get an error "duplicate member ip_v under 4.1 GAMMA */
  74 #include <netinet/ip.h>
  75 #endif /* NS_TARGET */
  76 #include <netinet/if_ether.h>
  77 #include <net/route.h>
  78 #include <netinet/in.h>
  79
  80 #include <netinfo/ni.h>
  81
  82 #include "pppd.h"
  83
  84 static const char rcsid[] = RCSID;
  85
  86 static int initdisc = -1;       /* Initial TTY discipline */
  87 static int initfdflags = -1;    /* Initial file descriptor flags for fd */
  88 static int ppp_fd = -1;         /* fd which is set to PPP discipline */
  89 static int loop_slave = -1;
  90 static int loop_master;
  91 static char loop_name[20];
  92
  93 static fd_set in_fds;           /* set of fds that wait_input waits for */
  94 static int max_in_fd;           /* highest fd set in in_fds */
  95
  96 extern int errno;
  97
  98 static int      restore_term;   /* 1 => we've munged the terminal */
  99 static struct termios inittermios; /* Initial TTY termios */
 100
 101 static int sockfd;              /* socket for doing interface ioctls */
 102 static int pppdev;  /* +++ */
 103
 104 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
 105 #define ioctl   myioctl
 106 #endif
 107
 108 static int if_is_up;            /* the interface is currently up */
 109 static u_int32_t default_route_gateway; /* gateway addr for default route */
 110 static u_int32_t proxy_arp_addr;        /* remote addr for proxy arp */
 111
 112 /* Prototypes for procedures local to this file. */
 113 static int translate_speed __P((int));
 114 static int baud_rate_of __P((int));
 115 static int dodefaultroute __P((u_int32_t, int));
 116 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
 117 static int ether_by_host __P((char *, struct ether_addr *));
 118
 119
 120 /*
 121  * sys_init - System-dependent initialization.
 122  */
 123 void
 124 sys_init()
 125 {
 126     openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
 127     setlogmask(LOG_UPTO(LOG_INFO));
 128
 129     /* Get an internet socket for doing socket ioctl's on. */
 130     if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
 131         fatal("Couldn't create IP socket: %m");
 132
 133     if((pppdev = open("/dev/ppp0", O_RDWR, O_NONBLOCK)) == NULL)
 134         fatal("Couldn't open /dev/ppp0: %m");
 135
 136     FD_ZERO(&in_fds);
 137     max_in_fd = 0;
 138 }
 139
 140 /*
 141  * sys_cleanup - restore any system state we modified before exiting:
 142  * mark the interface down, delete default route and/or proxy arp entry.
 143  * This should call die() because it's called from die().
 144  */
 145 void
 146 sys_cleanup()
 147 {
 148     struct ifreq ifr;
 149
 150     if (if_is_up) {
 151         strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
 152         if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
 153             && ((ifr.ifr_flags & IFF_UP) != 0)) {
 154             ifr.ifr_flags &= ~IFF_UP;
 155             ioctl(sockfd, SIOCSIFFLAGS, &ifr);
 156         }
 157     }
 158
 159     if (default_route_gateway)
 160         cifdefaultroute(0, 0, default_route_gateway);
 161     if (proxy_arp_addr)
 162         cifproxyarp(0, proxy_arp_addr);
 163
 164     close(pppdev);
 165 }
 166
 167 /*
 168  * ppp_available - check whether the system has any ppp interfaces
 169  * (in fact we check whether we can do an ioctl on ppp0).
 170  */
 171 int
 172 ppp_available()
 173 {
 174     int s, ok;
 175     struct ifreq ifr;
 176     extern char *no_ppp_msg;
 177
 178     if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
 179         return 1;               /* can't tell - maybe we're not root */
 180
 181     strlcpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
 182     ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
 183     close(s);
 184
 185     no_ppp_msg = "\
 186 This system lacks kernel support for PPP.  To include PPP support\n\
 187 in the kernel, please follow the steps detailed in the README.NeXT\n\
 188 file in the ppp-2.2 distribution.\n";
 189
 190     return ok;
 191 }
 192
 193 /*
 194  * establish_ppp - Turn the serial port into a ppp interface.
 195  */
 196 int
 197 establish_ppp(fd)
 198     int fd;
 199 {
 200     int pppdisc = PPPDISC;
 201     int x;
 202
 203     if (ioctl(fd, TIOCGETD, &initdisc) < 0)
 204         fatal("ioctl(TIOCGETD): %m");
 205     if (ioctl(fd, TIOCSETD, &pppdisc) < 0)
 206         fatal("ioctl(establish TIOCSETD): %m");
 207
 208     /*
 209      * Find out which interface we were given.
 210      */
 211     if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0)
 212         fatal("ioctl(PPPIOCGUNIT): %m");
 213
 214     /*
 215      * Enable debug in the driver if requested.
 216      */
 217     if (kdebugflag) {
 218         if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 219             warn("ioctl(PPPIOCGFLAGS): %m");
 220         } else {
 221             x |= (kdebugflag & 0xFF) * SC_DEBUG;
 222             if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
 223                 warn("ioctl(PPPIOCSFLAGS): %m");
 224         }
 225     }
 226
 227     /*
 228      * Set device for non-blocking reads so PPPD can poll for
 229      * input from the kernel.
 230      */
 231     if ((initfdflags = fcntl(fd, F_GETFL)) == -1
 232         || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
 233         warn("Couldn't set device to non-blocking mode: %m");
 234     }
 235
 236     return fd;
 237 }
 238
 239
 240 /*
 241  * disestablish_ppp - Restore the serial port to normal operation.
 242  * This shouldn't call die() because it's called from die().
 243  */
 244 void
 245 disestablish_ppp(fd)
 246     int fd;
 247 {
 248     /* Reset non-blocking mode on fd. */
 249     if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
 250         warn("Couldn't restore device fd flags: %m");
 251     initfdflags = -1;
 252
 253     /* Restore old line discipline. */
 254     if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
 255         error("ioctl(TIOCSETD): %m");
 256     initdisc = -1;
 257 }
 258
 259 /*
 260  * Check whether the link seems not to be 8-bit clean.
 261  */
 262 void
 263 clean_check()
 264 {
 265     int x;
 266     char *s;
 267
 268     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
 269         s = NULL;
 270         switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
 271         case SC_RCV_B7_0:
 272             s = "bit 7 set to 1";
 273             break;
 274         case SC_RCV_B7_1:
 275             s = "bit 7 set to 0";
 276             break;
 277         case SC_RCV_EVNP:
 278             s = "odd parity";
 279             break;
 280         case SC_RCV_ODDP:
 281             s = "even parity";
 282             break;
 283         }
 284         if (s != NULL) {
 285             warn("Serial link is not 8-bit clean:");
 286             warn("All received characters had %s", s);
 287         }
 288     }
 289 }
 290
 291 /*
 292  * List of valid speeds.
 293  */
 294 struct speed {
 295     int speed_int, speed_val;
 296 } speeds[] = {
 297 #ifdef B50
 298     { 50, B50 },
 299 #endif
 300 #ifdef B75
 301     { 75, B75 },
 302 #endif
 303 #ifdef B110
 304     { 110, B110 },
 305 #endif
 306 #ifdef B134
 307     { 134, B134 },
 308 #endif
 309 #ifdef B150
 310     { 150, B150 },
 311 #endif
 312 #ifdef B200
 313     { 200, B200 },
 314 #endif
 315 #ifdef B300
 316     { 300, B300 },
 317 #endif
 318 #ifdef B600
 319     { 600, B600 },
 320 #endif
 321 #ifdef B1200
 322     { 1200, B1200 },
 323 #endif
 324 #ifdef B1800
 325     { 1800, B1800 },
 326 #endif
 327 #ifdef B2000
 328     { 2000, B2000 },
 329 #endif
 330 #ifdef B2400
 331     { 2400, B2400 },
 332 #endif
 333 #ifdef B3600
 334     { 3600, B3600 },
 335 #endif
 336 #ifdef B4800
 337     { 4800, B4800 },
 338 #endif
 339 #ifdef B7200
 340     { 7200, B7200 },
 341 #endif
 342 #ifdef B9600
 343     { 9600, B9600 },
 344 #endif
 345 #ifdef B19200
 346     { 19200, B19200 },
 347 #endif
 348 #ifdef B38400
 349     { 38400, B38400 },
 350 #endif
 351 #ifdef EXTA
 352     { 19200, EXTA },
 353 #endif
 354 #ifdef EXTB
 355     { 38400, EXTB },
 356 #endif
 357 #ifdef B14400
 358     { 14400, B14400 },
 359 #endif
 360 #ifdef B28800
 361     { 28800, B28800 },
 362 #endif
 363 #ifdef B43200
 364     { 43200, B43200 },
 365 #endif
 366 #ifdef B57600
 367     { 57600, B57600 },
 368 #endif
 369 /*
 370 #ifndef B115200
 371 #warning Defining B115200
 372 #define B115200 20
 373 #endif
 374 */
 375 #ifdef B115200
 376     { 115200, B115200 },
 377 #endif
 378     { 0, 0 }
 379 };
 380
 381 /*
 382  * Translate from bits/second to a speed_t.
 383  */
 384 int
 385 translate_speed(bps)
 386     int bps;
 387 {
 388     struct speed *speedp;
 389
 390     if (bps == 0)
 391         return 0;
 392     for (speedp = speeds; speedp->speed_int; speedp++)
 393         if (bps == speedp->speed_int)
 394             return speedp->speed_val;
 395     warn("speed %d not supported", bps);
 396     return 0;
 397 }
 398
 399 /*
 400  * Translate from a speed_t to bits/second.
 401  */
 402 static int
 403 baud_rate_of(speed)
 404     int speed;
 405 {
 406     struct speed *speedp;
 407
 408     if (speed == 0)
 409         return 0;
 410     for (speedp = speeds; speedp->speed_int; speedp++)
 411         if (speed == speedp->speed_val)
 412             return speedp->speed_int;
 413     return 0;
 414 }
 415
 416
 417 /*
 418  * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
 419  * at the requested speed, etc.  If `local' is true, set CLOCAL
 420  * regardless of whether the modem option was specified.
 421  */
 422 void
 423 set_up_tty(fd, local)
 424     int fd, local;
 425 {
 426     int speed, x, modembits;
 427     struct termios tios;
 428
 429     if (tcgetattr(fd, &tios) < 0)
 430         fatal("tcgetattr: %m");
 431
 432     if (!restore_term)
 433         inittermios = tios;
 434
 435     tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
 436
 437     tios.c_cflag |= CS8 | CREAD | HUPCL;
 438     if (local || !modem)
 439         tios.c_cflag |= CLOCAL;
 440
 441     tios.c_iflag = IGNBRK | IGNPAR;
 442     tios.c_oflag = 0;
 443     tios.c_lflag = 0;
 444     tios.c_cc[VMIN] = 1;
 445     tios.c_cc[VTIME] = 0;
 446
 447     if (crtscts == -2) {
 448         tios.c_iflag |= IXON | IXOFF;
 449         tios.c_cc[VSTOP] = 0x13;        /* DC3 = XOFF = ^S */
 450         tios.c_cc[VSTART] = 0x11;       /* DC1 = XON  = ^Q */
 451     }
 452
 453     speed = translate_speed(inspeed);
 454     if (speed) {
 455         cfsetospeed(&tios, speed);
 456         cfsetispeed(&tios, speed);
 457     } else {
 458         speed = cfgetospeed(&tios);
 459         /*
 460          * We can't proceed if the serial port speed is B0,
 461          * since that implies that the serial port is disabled.
 462          */
 463         if (speed == B0)
 464             fatal("Baud rate for %s is 0; need explicit baud rate",
 465                   devnam);
 466     }
 467
 468     if (modem) {
 469       modembits = TIOCM_RTS | TIOCM_CTS;
 470       if (ioctl(fd, (crtscts ? TIOCMBIS : TIOCMBIC), &modembits) < 0)
 471         error("ioctl: TIOCMBIS/BIC: %m");
 472     }
 473
 474     if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
 475         fatal("tcsetattr: %m");
 476
 477    baud_rate = inspeed = baud_rate_of(speed);
 478    restore_term = 1;
 479 }
 480
 481 /*
 482  * restore_tty - restore the terminal to the saved settings.
 483  */
 484 void
 485 restore_tty(fd)
 486     int fd;
 487 {
 488     if (restore_term) {
 489         if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
 490             if (errno != ENXIO)
 491                 warn("tcsetattr: %m");
 492         restore_term = 0;
 493     }
 494 }
 495
 496 /*
 497  * setdtr - control the DTR line on the serial port.
 498  * This is called from die(), so it shouldn't call die().
 499  *
 500  * The write hack is to get NXFax to recognize that there is
 501  * activity on the port.  Not using the write nukes
 502  * NXFax's capability to determine port usage.
 503  *
 504  */
 505 void
 506 setdtr(fd, on)
 507 int fd, on;
 508 {
 509     int modembits = TIOCM_DTR;
 510
 511     if (!on)
 512       {
 513         write(fd, " ", 1);
 514         sleep(1);
 515       }
 516
 517 /*    ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); */
 518     ioctl(fd, (on? TIOCSDTR: TIOCCDTR), 0);
 519 }
 520
 521
 522 /*
 523  * output - Output PPP packet.
 524  */
 525 void
 526 output(unit, p, len)
 527     int unit;
 528     u_char *p;
 529     int len;
 530 {
 531     if (debug)
 532         dbglog("sent %P", p, len);
 533
 534     if (write(ttyfd, p, len) < 0) {
 535         if (errno == EWOULDBLOCK || errno == ENOBUFS
 536             || errno == ENXIO || errno == EIO) {
 537             warn("write: warning: %m");
 538         } else {
 539             fatal("write: %m");
 540         }
 541     }
 542 }
 543
 544
 545 /*
 546  * wait_input - wait until there is data available,
 547  * for the length of time specified by *timo (indefinite
 548  * if timo is NULL).
 549  */
 550 void
 551 wait_input(timo)
 552     struct timeval *timo;
 553 {
 554     fd_set ready;
 555     int n;
 556
 557     ready = in_fds;
 558     n = select(max_in_fd + 1, &ready, NULL, &ready, timo);
 559     if (n < 0 && errno != EINTR)
 560         fatal("select: %m");
 561 }
 562
 563
 564 /*
 565  * add_fd - add an fd to the set that wait_input waits for.
 566  */
 567 void add_fd(fd)
 568     int fd;
 569 {
 570     FD_SET(fd, &in_fds);
 571     if (fd > max_in_fd)
 572         max_in_fd = fd;
 573 }
 574
 575 /*
 576  * remove_fd - remove an fd from the set that wait_input waits for.
 577  */
 578 void remove_fd(fd)
 579     int fd;
 580 {
 581     FD_CLR(fd, &in_fds);
 582 }
 583
 584 /*
 585  * read_packet - get a PPP packet from the serial device.
 586  */
 587 int
 588 read_packet(buf)
 589     u_char *buf;
 590 {
 591     int len;
 592
 593     if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
 594         if (errno == EWOULDBLOCK || errno == EINTR) {
 595             SYSDEBUG(("read: %m"));
 596             return -1;
 597         }
 598         fatal("read: %m");
 599     }
 600     return len;
 601 }
 602
 603
 604 /*
 605  * ppp_send_config - configure the transmit characteristics of
 606  * the ppp interface.
 607  */
 608 void
 609 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
 610     int unit, mtu;
 611     u_int32_t asyncmap;
 612     int pcomp, accomp;
 613 {
 614     u_int x;
 615     struct ifreq ifr;
 616
 617     strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
 618     ifr.ifr_mtu = mtu;
 619     if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
 620         fatal("ioctl(SIOCSIFMTU): %m");
 621
 622     if (ioctl(ttyfd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
 623         fatal("ioctl(PPPIOCSASYNCMAP): %m");
 624
 625     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
 626         fatal("ioctl(PPPIOCGFLAGS): %m");
 627
 628     x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
 629     x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
 630     if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
 631         fatal("ioctl(PPPIOCSFLAGS): %m");
 632 }
 633
 634
 635 /*
 636  * ppp_set_xaccm - set the extended transmit ACCM for the interface.
 637  */
 638 void
 639 ppp_set_xaccm(unit, accm)
 640     int unit;
 641     ext_accm accm;
 642 {
 643     if (ioctl(ttyfd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
 644         warn("ioctl(PPPIOCSXASYNCMAP): %m");
 645 }
 646
 647
 648 /*
 649  * ppp_recv_config - configure the receive-side characteristics of
 650  * the ppp interface.
 651  */
 652 void
 653 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
 654     int unit, mru;
 655     u_int32_t asyncmap;
 656     int pcomp, accomp;
 657 {
 658     int x;
 659
 660     if (ioctl(ttyfd, PPPIOCSMRU, (caddr_t) &mru) < 0)
 661         fatal("ioctl(PPPIOCSMRU): %m");
 662     if (ioctl(ttyfd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
 663         fatal("ioctl(PPPIOCSRASYNCMAP): %m");
 664     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
 665         fatal("ioctl(PPPIOCGFLAGS): %m");
 666     x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
 667     if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
 668         fatal("ioctl(PPPIOCSFLAGS): %m");
 669 }
 670
 671 /*
 672  * ccp_test - ask kernel whether a given compression method
 673  * is acceptable for use.
 674  */
 675 int
 676 ccp_test(unit, opt_ptr, opt_len, for_transmit)
 677     int unit, opt_len, for_transmit;
 678     u_char *opt_ptr;
 679 {
 680     struct ppp_option_data data;
 681
 682     data.ptr = opt_ptr;
 683     data.length = opt_len;
 684     data.transmit = for_transmit;
 685     if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
 686         return 1;
 687     return (errno == ENOBUFS)? 0: -1;
 688 }
 689
 690 /*
 691  * ccp_flags_set - inform kernel about the current state of CCP.
 692  */
 693 void
 694 ccp_flags_set(unit, isopen, isup)
 695     int unit, isopen, isup;
 696 {
 697     int x;
 698
 699     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 700         error("ioctl(PPPIOCGFLAGS): %m");
 701         return;
 702     }
 703     x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
 704     x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
 705     if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
 706         error("ioctl(PPPIOCSFLAGS): %m");
 707 }
 708
 709 /*
 710  * ccp_fatal_error - returns 1 if decompression was disabled as a
 711  * result of an error detected after decompression of a packet,
 712  * 0 otherwise.  This is necessary because of patent nonsense.
 713  */
 714 int
 715 ccp_fatal_error(unit)
 716     int unit;
 717 {
 718     int x;
 719
 720     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 721         error("ioctl(PPPIOCGFLAGS): %m");
 722         return 0;
 723     }
 724     return x & SC_DC_FERROR;
 725 }
 726
 727 /*
 728  * sifvjcomp - config tcp header compression
 729  */
 730 int
 731 sifvjcomp(u, vjcomp, cidcomp, maxcid)
 732     int u, vjcomp, cidcomp, maxcid;
 733 {
 734     u_int x;
 735
 736     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 737         error("ioctl(PPIOCGFLAGS): %m");
 738         return 0;
 739     }
 740     x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
 741     x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
 742     if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
 743         error("ioctl(PPPIOCSFLAGS): %m");
 744         return 0;
 745     }
 746     if (ioctl(ttyfd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
 747         error("ioctl(PPPIOCSFLAGS): %m");
 748         return 0;
 749     }
 750     return 1;
 751 }
 752
 753 /*
 754  * sifup - Config the interface up and enable IP packets to pass.
 755  */
 756 #ifndef SC_ENABLE_IP
 757 #define SC_ENABLE_IP    0x100   /* compat for old versions of kernel code */
 758 #endif
 759
 760 int
 761 sifup(u)
 762     int u;
 763 {
 764     struct ifreq ifr;
 765     u_int x;
 766     struct npioctl npi;
 767
 768     strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
 769     if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 770         error("ioctl (SIOCGIFFLAGS): %m");
 771         return 0;
 772     }
 773     ifr.ifr_flags |= IFF_UP;
 774     if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 775         error("ioctl(SIOCSIFFLAGS): %m");
 776         return 0;
 777     }
 778     if_is_up = 1;
 779     npi.protocol = PPP_IP;
 780     npi.mode = NPMODE_PASS;
 781     if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
 782         if (errno != ENOTTY) {
 783             error("ioctl(PPPIOCSNPMODE): %m");
 784             return 0;
 785         }
 786         /* for backwards compatibility */
 787         if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 788             error("ioctl (PPPIOCGFLAGS): %m");
 789             return 0;
 790         }
 791         x |= SC_ENABLE_IP;
 792         if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
 793             error("ioctl(PPPIOCSFLAGS): %m");
 794             return 0;
 795         }
 796     }
 797     return 1;
 798 }
 799
 800 /*
 801  * sifdown - Config the interface down and disable IP.
 802  */
 803 int
 804 sifdown(u)
 805     int u;
 806 {
 807     struct ifreq ifr;
 808     u_int x;
 809     int rv;
 810     struct npioctl npi;
 811
 812     rv = 1;
 813     npi.protocol = PPP_IP;
 814     npi.mode = NPMODE_ERROR;
 815     ioctl(ttyfd, PPPIOCSNPMODE, (caddr_t) &npi);
 816     /* ignore errors, because ttyfd might have been closed by now. */
 817
 818
 819     strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
 820     if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 821         error("ioctl (SIOCGIFFLAGS): %m");
 822         rv = 0;
 823     } else {
 824         ifr.ifr_flags &= ~IFF_UP;
 825         if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 826             error("ioctl(SIOCSIFFLAGS): %m");
 827             rv = 0;
 828         } else
 829             if_is_up = 0;
 830     }
 831     return rv;
 832 }
 833
 834 /*
 835  * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
 836  * if it exists.
 837  */
 838 #define SET_SA_FAMILY(addr, family)             \
 839     BZERO((char *) &(addr), sizeof(addr));      \
 840     addr.sa_family = (family);
 841
 842 /*
 843  * sifaddr - Config the interface IP addresses and netmask.
 844  */
 845 int
 846 sifaddr(u, o, h, m)
 847     int u;
 848     u_int32_t o, h, m;
 849 {
 850     int ret;
 851     struct ifreq ifr;
 852
 853     ret = 1;
 854     strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
 855     SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
 856     ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
 857     if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
 858         error("ioctl(SIOCAIFADDR): %m");
 859         ret = 0;
 860     }
 861     ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
 862     if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
 863         error("ioctl(SIOCSIFDSTADDR): %m");
 864         ret = 0;
 865     }
 866     if (m != 0) {
 867         ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
 868         info("Setting interface mask to %s\n", ip_ntoa(m));
 869         if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
 870             error("ioctl(SIOCSIFNETMASK): %m");
 871             ret = 0;
 872         }
 873     }
 874     return ret;
 875 }
 876
 877 /*
 878  * cifaddr - Clear the interface IP addresses, and delete routes
 879  * through the interface if possible.
 880  *
 881  * N.B.: under NextStep, you can't *delete* an address on an interface,
 882  * so we change it to 0.0.0.0...  A real hack.  But it simplifies
 883  * reconnection on the server side.
 884  */
 885 int
 886 cifaddr(u, o, h)
 887     int u;
 888     u_int32_t o, h;
 889 {
 890     struct rtentry rt;
 891
 892 #if 1
 893     h = o = 0L;
 894     (void) sifaddr(u, o, h, 0L);
 895 #endif
 896     SET_SA_FAMILY(rt.rt_dst, AF_INET);
 897     ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
 898     SET_SA_FAMILY(rt.rt_gateway, AF_INET);
 899     ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
 900     rt.rt_flags = RTF_HOST;
 901     if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
 902         error("ioctl(SIOCDELRT): %m");
 903         return 0;
 904     }
 905     return 1;
 906 }
 907
 908 /*
 909  * sifdefaultroute - assign a default route through the address given.
 910  */
 911 int
 912 sifdefaultroute(u, l, g)
 913     int u;
 914     u_int32_t l, g;
 915 {
 916     return dodefaultroute(g, 's');
 917 }
 918
 919 /*
 920  * cifdefaultroute - delete a default route through the address given.
 921  */
 922 int
 923 cifdefaultroute(u, l, g)
 924     int u;
 925     u_int32_t l, g;
 926 {
 927     return dodefaultroute(g, 'c');
 928 }
 929
 930 /*
 931  * dodefaultroute - talk to a routing socket to add/delete a default route.
 932  */
 933 int
 934 dodefaultroute(g, cmd)
 935     u_int32_t g;
 936     int cmd;
 937 {
 938     struct rtentry rt;
 939
 940     SET_SA_FAMILY(rt.rt_dst, AF_INET);
 941     ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = 0L;
 942     SET_SA_FAMILY(rt.rt_gateway, AF_INET);
 943     ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
 944     rt.rt_flags = RTF_GATEWAY;
 945     if (ioctl(sockfd, (cmd == 's') ? SIOCADDRT : SIOCDELRT, &rt) < 0) {
 946         error("%cifdefaultroute: ioctl(%s): %m", cmd,
 947                (cmd == 's') ? "SIOCADDRT" : "SIOCDELRT");
 948         return 0;
 949     }
 950     default_route_gateway = (cmd == 's')? g: 0;
 951     return 1;
 952 }
 953
 954 /*
 955  * sifproxyarp - Make a proxy ARP entry for the peer.
 956  */
 957 int
 958 sifproxyarp(unit, hisaddr)
 959     int unit;
 960     u_int32_t hisaddr;
 961 {
 962     struct arpreq arpreq;
 963
 964     BZERO(&arpreq, sizeof(arpreq));
 965
 966     /*
 967      * Get the hardware address of an interface on the same subnet
 968      * as our local address.
 969      */
 970     if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
 971         error("Cannot determine ethernet address for proxy ARP");
 972         return 0;
 973     }
 974
 975     SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
 976     ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
 977     arpreq.arp_flags = ATF_PERM | ATF_PUBL;
 978     if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
 979         error("ioctl(SIOCSARP): %m");
 980         return 0;
 981     }
 982
 983     proxy_arp_addr = hisaddr;
 984     return 1;
 985 }
 986
 987 /*
 988  * cifproxyarp - Delete the proxy ARP entry for the peer.
 989  */
 990 int
 991 cifproxyarp(unit, hisaddr)
 992     int unit;
 993     u_int32_t hisaddr;
 994 {
 995     struct arpreq arpreq;
 996
 997     BZERO(&arpreq, sizeof(arpreq));
 998     SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
 999     ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1000     if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1001         warn("ioctl(SIOCDARP): %m");
1002         return 0;
1003     }
1004     proxy_arp_addr = 0;
1005     return 1;
1006 }
1007
1008 /*
1009  * get_ether_addr - get the hardware address of an interface on the
1010  * the same subnet as ipaddr.
1011  */
1012 #define MAX_IFS         32
1013
1014 int
1015 get_ether_addr(ipaddr, hwaddr)
1016     u_int32_t ipaddr;
1017     struct sockaddr *hwaddr;
1018 {
1019     struct ifreq *ifr, *ifend, *ifp;
1020     u_int32_t ina, mask;
1021     struct ether_addr dla;
1022     struct ifreq ifreq;
1023     struct ifconf ifc;
1024     struct ifreq ifs[MAX_IFS];
1025     struct hostent *hostent;
1026
1027     ifc.ifc_len = sizeof(ifs);
1028     ifc.ifc_req = ifs;
1029     if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1030         error("ioctl(SIOCGIFCONF): %m");
1031         return 0;
1032     }
1033
1034     /*
1035      * Scan through looking for an interface with an Internet
1036      * address on the same subnet as `ipaddr'.
1037      */
1038     ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1039     for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1040                 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1041         if (ifr->ifr_addr.sa_family == AF_INET) {
1042             ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1043             strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1044             /*
1045              * Check that the interface is up, and not point-to-point
1046              * or loopback.
1047              */
1048             if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1049                 continue;
1050             if ((ifreq.ifr_flags &
1051                  (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1052                  != (IFF_UP|IFF_BROADCAST))
1053                 continue;
1054             /*
1055              * Get its netmask and check that it's on the right subnet.
1056              */
1057             if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1058                 continue;
1059             mask = ((struct sockaddr_in*)&ifreq.ifr_addr)->sin_addr.s_addr;
1060             if ((ipaddr & mask) != (ina & mask))
1061                 continue;
1062
1063             break;
1064         }
1065     }
1066
1067     if (ifr >= ifend)
1068         return 0;
1069     info("found interface %s for proxy arp", ifr->ifr_name);
1070
1071     /*
1072      * Get the hostname and look for an entry using the ethers database.
1073      * Under NeXTStep this is the best we can do for now.
1074      */
1075     if ((hostent = gethostbyaddr((char*)&ina, sizeof(ina), AF_INET)) == NULL)
1076         return 0;
1077
1078     if (ether_by_host(hostent->h_name, &dla)) {
1079         info("Add entry for %s in /etc/ethers", hostent->h_name);
1080         return 0;       /* it's not there */
1081     }
1082     hwaddr->sa_family = AF_UNSPEC;
1083     BCOPY(&dla, hwaddr->sa_data, sizeof(dla));
1084     return 1;
1085 }
1086
1087 static int
1088 ether_by_host(hostname, etherptr)
1089     char *hostname;
1090     struct ether_addr *etherptr;
1091 {
1092     struct ether_addr *thisptr;
1093     void *conn;
1094     ni_id root;
1095     ni_namelist val;
1096     char path[256];
1097
1098     if (!ether_hostton(hostname, etherptr))
1099         return 0;
1100     /*
1101      * We shall now try and
1102      * find the address in the
1103      * top domain of netinfo.
1104      */
1105     slprintf(path, sizeof(path), "/machines/%s", hostname);
1106
1107     if (ni_open((void *)0, "/", &conn)
1108      || ni_root(conn, &root)
1109      || ni_pathsearch(conn, &root, path)
1110      || ni_lookupprop(conn, &root, "en_address", &val))
1111         return 1;
1112
1113     /*
1114      * Now we can convert the returned string into an ethernet address.
1115      */
1116     strlcpy(path, val.ni_namelist_val[0], sizeof(path));
1117     ni_free(conn);
1118     if ((thisptr = (struct ether_addr*)ether_aton(path)) == NULL)
1119         return 1;
1120     BCOPY(thisptr, etherptr, sizeof(struct ether_addr));
1121     return 0;
1122 }
1123
1124
1125
1126 /*
1127  * Return user specified netmask, modified by any mask we might determine
1128  * for address `addr' (in network byte order).
1129  * Here we scan through the system's list of interfaces, looking for
1130  * any non-point-to-point interfaces which might appear to be on the same
1131  * network as `addr'.  If we find any, we OR in their netmask to the
1132  * user-specified netmask.
1133  */
1134 u_int32_t
1135 GetMask(addr)
1136     u_int32_t addr;
1137 {
1138     u_int32_t mask, nmask, ina;
1139     struct ifreq *ifr, *ifend, ifreq;
1140     struct ifconf ifc;
1141     struct ifreq ifs[MAX_IFS];
1142
1143     addr = ntohl(addr);
1144     if (IN_CLASSA(addr))        /* determine network mask for address class */
1145         nmask = IN_CLASSA_NET;
1146     else if (IN_CLASSB(addr))
1147         nmask = IN_CLASSB_NET;
1148     else
1149         nmask = IN_CLASSC_NET;
1150     /* class D nets are disallowed by bad_ip_adrs */
1151     mask = netmask | htonl(nmask);
1152
1153     /*
1154      * Scan through the system's network interfaces.
1155      */
1156     ifc.ifc_len = sizeof(ifs);
1157     ifc.ifc_req = ifs;
1158     if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1159         warn("ioctl(SIOCGIFCONF): %m");
1160         return mask;
1161     }
1162     ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1163     for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1164                 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1165         /*
1166          * Check the interface's internet address.
1167          */
1168         if (ifr->ifr_addr.sa_family != AF_INET)
1169             continue;
1170         ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1171         if ((ntohl(ina) & nmask) != (addr & nmask))
1172             continue;
1173         /*
1174          * Check that the interface is up, and not point-to-point or loopback.
1175          */
1176         strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1177         if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1178             continue;
1179         if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1180             != IFF_UP)
1181             continue;
1182         /*
1183          * Get its netmask and OR it into our mask.
1184          */
1185         if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1186             continue;
1187         mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1188     }
1189
1190     return mask;
1191 }
1192
1193 /*
1194  * have_route_to - determine if the system has any route to
1195  * a given IP address.
1196  * For demand mode to work properly, we have to ignore routes
1197  * through our own interface.
1198  */
1199 int have_route_to(u_int32_t addr)
1200 {
1201     return -1;
1202 }
1203
1204 #if 0
1205 /*
1206  * daemon - Detach us from the terminal session.
1207  */
1208 int
1209 daemon(nochdir, noclose)
1210     int nochdir, noclose;
1211 {
1212     int pid;
1213
1214     if ((pid = fork()) < 0)
1215         return -1;
1216     if (pid != 0)
1217         exit(0);                /* parent dies */
1218     (void)setsid();
1219     if (!nochdir)
1220         chdir("/");
1221     if (!noclose) {
1222         fclose(stdin);          /* don't need stdin, stdout, stderr */
1223         fclose(stdout);
1224         fclose(stderr);
1225     }
1226     return 0;
1227 }
1228 #endif
1229
1230 char *
1231 strdup(s)
1232     const char *s;
1233 {
1234     char *d = malloc(strlen(s) + 1);
1235
1236     if (d) strcpy(d, s);
1237     return d;
1238 }
1239
1240 /*
1241  * This logwtmp() implementation is subject to the following copyright:
1242  *
1243  * Copyright (c) 1988 The Regents of the University of California.
1244  * All rights reserved.
1245  *
1246  * Redistribution and use in source and binary forms are permitted
1247  * provided that the above copyright notice and this paragraph are
1248  * duplicated in all such forms and that any documentation,
1249  * advertising materials, and other materials related to such
1250  * distribution and use acknowledge that the software was developed
1251  * by the University of California, Berkeley.  The name of the
1252  * University may not be used to endorse or promote products derived
1253  * from this software without specific prior written permission.
1254  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
1255  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
1256  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1257  */
1258
1259 #define WTMPFILE        "/usr/adm/wtmp"
1260
1261 void
1262 logwtmp(line, name, host)
1263     const char *line, *name, *host;
1264 {
1265     int fd;
1266     struct stat buf;
1267     struct utmp ut;
1268
1269     if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1270         return;
1271     if (!fstat(fd, &buf)) {
1272         strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1273         strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1274         strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1275         (void)time(&ut.ut_time);
1276         if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1277             (void)ftruncate(fd, buf.st_size);
1278     }
1279     close(fd);
1280 }
1281
1282 #if 0
1283 /*
1284  * Routines for locking and unlocking the serial device, moved here
1285  * from chat.c.
1286  */
1287
1288 #define LOCK_PREFIX     "/usr/spool/uucp/LCK/LCK.."
1289
1290 static char *lock_file;
1291
1292 /*
1293  * lock - create a lock file for the named device
1294  */
1295 int
1296 lock(dev)
1297     char *dev;
1298 {
1299     int fd, pid, n;
1300     char *p;
1301     size_t l;
1302
1303     if ((p = strrchr(dev, '/')) != NULL)
1304         dev = p + 1;
1305     l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1306     lock_file = malloc(l);
1307     if (lock_file == NULL)
1308         novm("lock file name");
1309     slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1310
1311     while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1312         if (errno == EEXIST
1313             && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1314             /* Read the lock file to find out who has the device locked */
1315             n = read(fd, &pid, sizeof(pid));
1316             if (n <= 0) {
1317                 error("Can't read pid from lock file %s", lock_file);
1318                 close(fd);
1319             } else {
1320                 if (kill(pid, 0) == -1 && errno == ESRCH) {
1321                     /* pid no longer exists - remove the lock file */
1322                     if (unlink(lock_file) == 0) {
1323                         close(fd);
1324                         notice("Removed stale lock on %s (pid %d)",
1325                                dev, pid);
1326                         continue;
1327                     } else
1328                         warn("Couldn't remove stale lock on %s", dev);
1329                 } else
1330                     notice("Device %s is locked by pid %d",
1331                            dev, pid);
1332             }
1333             close(fd);
1334         } else
1335             error("Can't create lock file %s: %m", lock_file);
1336         free(lock_file);
1337         lock_file = NULL;
1338         return -1;
1339     }
1340
1341     pid = getpid();
1342     write(fd, &pid, sizeof pid);
1343
1344     close(fd);
1345     return 0;
1346 }
1347
1348 /*
1349  * unlock - remove our lockfile
1350  */
1351 void
1352 unlock()
1353 {
1354     if (lock_file) {
1355         unlink(lock_file);
1356         free(lock_file);
1357         lock_file = NULL;
1358     }
1359 }
1360 #endif
1361
1362 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
1363 int
1364 ioctl(fd, cmd, c)
1365     int fd, cmd;
1366     caddr_t c;
1367 {
1368 #undef  ioctl
1369     int ret;
1370
1371 #ifdef DEBUGIOCTL
1372     int serrno;
1373     u_char let, code, size;
1374
1375     size = (cmd >> 16) & IOCPARM_MASK;
1376     let = (cmd >> 8);
1377     code = cmd;
1378
1379     if (let == 't' && (75 <= code && code <= 90))
1380     info("ioctl(%d, 0x%x ('%c', %d, %d), 0x%x)\n", fd, cmd,
1381            let, code, size, c);
1382 #endif
1383
1384     ret = ioctl(fd, cmd, c);
1385
1386 #ifdef DEBUGIOCTL
1387     serrno = errno;
1388     if (ret == -1)
1389         info("ioctl('%c', %d, %d) errno = %d (%m)\n",
1390                 let, code, size, errno);
1391     if (let == 't' && (75 <= code && code <= 90) && (cmd & IOC_OUT)) {
1392         int i, len = ((cmd >> 16) & IOCPARM_MASK);
1393         for (i = 0; i < len / 4; ++i)
1394                 info("word[%d] @ 0x%06x = 0x%x\n",
1395                        i, &((int *) c)[i],((int *)c)[i]);
1396     }
1397     errno = serrno;
1398 #endif
1399
1400     if (ret == -1 && errno == EPERM)
1401         errno = ret = 0;
1402     return ret;
1403 }
1404 #endif  /* HAS_BROKEN_IOCTL */
1405
1406
1407 #if defined(FIXSIGS) && (defined (hppa) || defined(sparc))
1408
1409 /*
1410  * These redefinitions of Posix functions are necessary
1411  * because HPPA systems have an OS bug that causes
1412  * sigaction to core dump:
1413  *
1414  * AlainF 9-Nov-1994    HACK FOR HP-PA/NEXTSTEP
1415  *                      sigaction(3) seems broken in the HP-PA NeXTSTEP 3.2
1416  *                      Posix lib. This causes pppd to SIGBUS at the expiration
1417  *                      of the first timeout (_sigtramp seems to invoke
1418  *                      the SIGALRM handler at an unreasonably low address).
1419  *                      All calls so sigaction(3) have been changed to calls
1420  *                      to sigvec(2) and sigprocmask(SIG_BLOCK,...) to
1421  *                      sigblock(2).
1422  *                      This is kind of a hack, especially since there are
1423  *                      other routines of the Posix lib still used, but
1424  *                      it worked for me.
1425  *
1426  * Dave Hess <David-Hess@net.tamu.edu> noted that 3.3 Sparc seems to
1427  * have the same bug.  Thus this fix has been enabled for SPARC also.
1428  *
1429  *
1430  */
1431
1432 int sigemptyset(sigset_t *mask)
1433 {
1434   *mask = 0;
1435 }
1436
1437 sigaddset(sigset_t *mask, int which_sig)
1438 {
1439   *mask |= sigmask(which_sig);
1440 }
1441
1442
1443 int sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
1444 {
1445    struct sigvec sv;
1446    static int in = 0;
1447
1448    sv.sv_handler = act->sa_handler;
1449    sv.sv_mask = act->sa_mask;
1450    sv.sv_flags = 0;
1451
1452    if (!in)
1453      {
1454        in = 1;
1455        warn("PPPD: Inside modified HP and SPARC sigaction\n");
1456      }
1457
1458    return sigvec(sig, &sv, NULL);
1459 }
1460
1461 #endif
1462
1463
1464 /*
1465  * Code following is added for 2.3 compatibility
1466  */
1467
1468 /*
1469  * get_idle_time - return how long the link has been idle.
1470  */
1471 int
1472 get_idle_time(u, ip)
1473     int u;
1474     struct ppp_idle *ip;
1475 {
1476   return (ioctl(ttyfd, PPPIOCGIDLE, ip) >= 0);
1477 }
1478
1479 /*
1480  * get_ppp_stats - return statistics for the link.
1481  */
1482 int
1483 get_ppp_stats(u, stats)
1484     int u;
1485     struct pppd_stats *stats;
1486 {
1487     struct ifpppstatsreq req;
1488
1489     memset (&req, 0, sizeof (req));
1490     strlcpy(req.ifr_name, interface, sizeof(req.ifr_name));
1491     if (ioctl(sockfd, SIOCGPPPSTATS, &req) < 0) {
1492         error("Couldn't get PPP statistics: %m");
1493         return 0;
1494     }
1495     stats->bytes_in = req.stats.p.ppp_ibytes;
1496     stats->bytes_out = req.stats.p.ppp_obytes;
1497     return 1;
1498 }
1499
1500
1501 /*
1502  * get_loop_output - read characters from the loopback, form them
1503  * into frames, and detect when we want to bring the real link up.
1504  * Return value is 1 if we need to bring up the link, 0 otherwise.
1505  */
1506 int
1507 get_loop_output()
1508 {
1509
1510 #if 0
1511     int rv = 0;
1512     int n;
1513
1514     while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
1515         if (loop_chars(inbuf, n))
1516             rv = 1;
1517     }
1518
1519     if (n == 0)
1520         fatal("eof on loopback");
1521     if (errno != EWOULDBLOCK)
1522         fatal("read from loopback: %m");
1523
1524     return rv;
1525 #endif
1526
1527     return 0;
1528 }
1529
1530 /*
1531  * sifnpmode - Set the mode for handling packets for a given NP.
1532  */
1533 int
1534 sifnpmode(u, proto, mode)
1535     int u;
1536     int proto;
1537     enum NPmode mode;
1538 {
1539     struct npioctl npi;
1540
1541     npi.protocol = proto;
1542     npi.mode = mode;
1543     if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
1544         error("ioctl(set NP %d mode to %d): %m", proto, mode);
1545         return 0;
1546     }
1547     return 1;
1548 }
1549
1550
1551 /*
1552  * open_ppp_loopback - open the device we use for getting
1553  * packets in demand mode, and connect it to a ppp interface.
1554  * Here we use a pty.
1555  */
1556 int
1557 open_ppp_loopback()
1558 {
1559
1560 #if 0
1561     int flags;
1562     struct termios tios;
1563     int pppdisc = PPPDISC;
1564
1565     fatal("open_ppp_loopback called!");
1566
1567     if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0)
1568         fatal("No free pty for loopback");
1569     SYSDEBUG(("using %s for loopback", loop_name));
1570
1571     if (tcgetattr(loop_slave, &tios) == 0) {
1572         tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
1573         tios.c_cflag |= CS8 | CREAD;
1574         tios.c_iflag = IGNPAR;
1575         tios.c_oflag = 0;
1576         tios.c_lflag = 0;
1577         if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
1578             warn("couldn't set attributes on loopback: %m");
1579     }
1580
1581     if ((flags = fcntl(loop_master, F_GETFL)) != -1)
1582         if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
1583             warn("couldn't set loopback to nonblock: %m");
1584
1585     ttyfd = loop_slave;
1586     if (ioctl(ttyfd, TIOCSETD, &pppdisc) < 0)
1587         fatal("ioctl(TIOCSETD): %m");
1588
1589     /*
1590      * Find out which interface we were given.
1591      */
1592     if (ioctl(ttyfd, PPPIOCGUNIT, &ifunit) < 0)
1593         fatal("ioctl(PPPIOCGUNIT): %m");
1594
1595     /*
1596      * Enable debug in the driver if requested.
1597      */
1598     if (kdebugflag) {
1599         if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
1600             warn("ioctl (PPPIOCGFLAGS): %m");
1601         } else {
1602             flags |= (kdebugflag & 0xFF) * SC_DEBUG;
1603             if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
1604                 warn("ioctl(PPPIOCSFLAGS): %m");
1605         }
1606     }
1607
1608     return loop_master;
1609 #endif
1610
1611 }
1612
1613 /*
1614  * restore_loop - reattach the ppp unit to the loopback.
1615  */
1616 void
1617 restore_loop()
1618 {
1619     int x;
1620
1621     /*
1622      * Transfer the ppp interface back to the loopback.
1623      */
1624     if (ioctl(ttyfd, PPPIOCXFERUNIT, 0) < 0)
1625         fatal("ioctl(transfer ppp unit): %m");
1626     x = PPPDISC;
1627     if (ioctl(loop_slave, TIOCSETD, &x) < 0)
1628         fatal("ioctl(TIOCSETD): %m");
1629
1630     /*
1631      * Check that we got the same unit again.
1632      */
1633     if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0)
1634         fatal("ioctl(PPPIOCGUNIT): %m");
1635     if (x != ifunit)
1636         fatal("transfer_ppp failed: wanted unit %d, got %d",
1637               ifunit, x);
1638     ttyfd = loop_slave;
1639 }
1640
1641
1642 /*
1643  * Use the hostid as part of the random number seed.
1644  */
1645 int
1646 get_host_seed()
1647 {
1648     return gethostid();
1649 }
1650
1651
1652 /*
1653  * sys_check_options - check the options that the user specified
1654  */
1655 int
1656 sys_check_options()
1657 {
1658   /*
1659    * We don't support demand dialing yet.
1660    */
1661   if (demand)
1662     {
1663       option_error("PPP-2.3 for NeXTSTEP does not yet support demand dialing");
1664       return 0;
1665     }
1666   return 1;
1667 }
1668
1669
1670 /*
1671  * sys_close - Clean up in a child process before execing.
1672  */
1673 void
1674 sys_close()
1675 {
1676     close(sockfd);
1677     if (loop_slave >= 0) {
1678         close(loop_slave);
1679         close(loop_master);
1680     }
1681     closelog();
1682 }
1683
1684 #if 0
1685 /*
1686  * wait_loop_output - wait until there is data available on the
1687  * loopback, for the length of time specified by *timo (indefinite
1688  * if timo is NULL).
1689  */
1690 void wait_loop_output(timo)
1691     struct timeval *timo;
1692 {
1693     fd_set ready;
1694     int n;
1695
1696     FD_ZERO(&ready);
1697     FD_SET(loop_master, &ready);
1698     n = select(loop_master + 1, &ready, NULL, &ready, timo);
1699     if (n < 0 && errno != EINTR)
1700         fatal("select: %m");
1701 }
1702
1703 /*
1704  * wait_time - wait for a given length of time or until a
1705  * signal is received.
1706  */
1707 void wait_time(timo)
1708     struct timeval *timo;
1709 {
1710     int n;
1711
1712     n = select(0, NULL, NULL, NULL, timo);
1713     if (n < 0 && errno != EINTR)
1714         fatal("select: %m");
1715 }
1716 #endif