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) 1989 Carnegie Mellon University.
   6  * Copyright (c) 1994 Philippe-Andre Prindeville.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms are permitted
  10  * provided that the above copyright notice and this paragraph are
  11  * duplicated in all such forms and that any documentation,
  12  * advertising materials, and other materials related to such
  13  * distribution and use acknowledge that the software was developed
  14  * by Carnegie Mellon University.  The name of the
  15  * University may not be used to endorse or promote products derived
  16  * from this software without specific prior written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  19  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  */
  21
  22 #ifndef lint
  23 static char rcsid[] = "$Id: sys-NeXT.c,v 1.13 1999/03/16 02:57:05 paulus Exp $";
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <termios.h>
  28 #include <utmp.h>
  29 #include <unistd.h>
  30 #include <stdlib.h>
  31 #include <libc.h>
  32 #include <strings.h>
  33 #include <sys/types.h>
  34 #include <sys/file.h>
  35 #include <sys/socket.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/time.h>
  38 #include <sys/errno.h>
  39 #include <sys/stat.h>
  40 #include <sys/fcntl.h>
  41
  42 #include <net/if.h>
  43 #include <net/ppp_defs.h>
  44 #include <net/if_ppp.h>
  45 #include <netdb.h>
  46 #include <netinet/in.h>
  47 #include <netinet/in_systm.h>
  48 #include <netinet/in_var.h>
  49 #if !(NS_TARGET >= 40)
  50 /* XXX get an error "duplicate member ip_v under 4.1 GAMMA */
  51 #include <netinet/ip.h>
  52 #endif /* NS_TARGET */
  53 #include <netinet/if_ether.h>
  54 #include <net/route.h>
  55 #include <netinet/in.h>
  56
  57 #include <netinfo/ni.h>
  58
  59 #include "pppd.h"
  60
  61 static int initdisc = -1;       /* Initial TTY discipline */
  62 static int initfdflags = -1;    /* Initial file descriptor flags for fd */
  63 static int ppp_fd = -1;         /* fd which is set to PPP discipline */
  64 static int loop_slave = -1;
  65 static int loop_master;
  66 static char loop_name[20];
  67
  68 static fd_set in_fds;           /* set of fds that wait_input waits for */
  69 static int max_in_fd;           /* highest fd set in in_fds */
  70
  71 extern int errno;
  72
  73 static int      restore_term;   /* 1 => we've munged the terminal */
  74 static struct termios inittermios; /* Initial TTY termios */
  75
  76 static char *lock_file;
  77
  78 static int sockfd;              /* socket for doing interface ioctls */
  79 static int pppdev;  /* +++ */
  80
  81 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
  82 #define ioctl   myioctl
  83 #endif
  84
  85 static int if_is_up;            /* the interface is currently up */
  86 static u_int32_t default_route_gateway; /* gateway addr for default route */
  87 static u_int32_t proxy_arp_addr;        /* remote addr for proxy arp */
  88
  89 /* Prototypes for procedures local to this file. */
  90 static int translate_speed __P((int));
  91 static int baud_rate_of __P((int));
  92 static int dodefaultroute __P((u_int32_t, int));
  93 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
  94 static int ether_by_host __P((char *, struct ether_addr *));
  95
  96
  97 /*
  98  * sys_init - System-dependent initialization.
  99  */
 100 void
 101 sys_init()
 102 {
 103     openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
 104     setlogmask(LOG_UPTO(LOG_INFO));
 105
 106     /* Get an internet socket for doing socket ioctl's on. */
 107     if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
 108         fatal("Couldn't create IP socket: %m");
 109
 110     if((pppdev = open("/dev/ppp0", O_RDWR, O_NONBLOCK)) == NULL)
 111         fatal("Couldn't open /dev/ppp0: %m");
 112
 113     FD_ZERO(&in_fds);
 114     max_in_fd = 0;
 115 }
 116
 117 /*
 118  * sys_cleanup - restore any system state we modified before exiting:
 119  * mark the interface down, delete default route and/or proxy arp entry.
 120  * This should call die() because it's called from die().
 121  */
 122 void
 123 sys_cleanup()
 124 {
 125     struct ifreq ifr;
 126
 127     if (if_is_up) {
 128         strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
 129         if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
 130             && ((ifr.ifr_flags & IFF_UP) != 0)) {
 131             ifr.ifr_flags &= ~IFF_UP;
 132             ioctl(sockfd, SIOCSIFFLAGS, &ifr);
 133         }
 134     }
 135
 136     if (default_route_gateway)
 137         cifdefaultroute(0, 0, default_route_gateway);
 138     if (proxy_arp_addr)
 139         cifproxyarp(0, proxy_arp_addr);
 140
 141     close(pppdev);
 142 }
 143
 144 /*
 145  * note_debug_level - note a change in the debug level.
 146  */
 147 void
 148 note_debug_level()
 149 {
 150     if (debug) {
 151         info("Debug turned ON, Level %d", debug);
 152         setlogmask(LOG_UPTO(LOG_DEBUG));
 153     } else {
 154         setlogmask(LOG_UPTO(LOG_WARNING));
 155     }
 156 }
 157
 158 /*
 159  * ppp_available - check whether the system has any ppp interfaces
 160  * (in fact we check whether we can do an ioctl on ppp0).
 161  */
 162 int
 163 ppp_available()
 164 {
 165     int s, ok;
 166     struct ifreq ifr;
 167     extern char *no_ppp_msg;
 168
 169     if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
 170         return 1;               /* can't tell - maybe we're not root */
 171
 172     strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), "ppp0");
 173     ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
 174     close(s);
 175
 176     no_ppp_msg = "\
 177 This system lacks kernel support for PPP.  To include PPP support\n\
 178 in the kernel, please follow the steps detailed in the README.NeXT\n\
 179 file in the ppp-2.2 distribution.\n";
 180
 181     return ok;
 182 }
 183
 184 /*
 185  * establish_ppp - Turn the serial port into a ppp interface.
 186  */
 187 void
 188 establish_ppp(fd)
 189     int fd;
 190 {
 191     int pppdisc = PPPDISC;
 192     int x;
 193
 194     if (ioctl(fd, TIOCGETD, &initdisc) < 0)
 195         fatal("ioctl(TIOCGETD): %m");
 196     if (ioctl(fd, TIOCSETD, &pppdisc) < 0)
 197         fatal("ioctl(establish TIOCSETD): %m");
 198
 199     /*
 200      * Find out which interface we were given.
 201      */
 202     if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0)
 203         fatal("ioctl(PPPIOCGUNIT): %m");
 204
 205     /*
 206      * Enable debug in the driver if requested.
 207      */
 208     if (kdebugflag) {
 209         if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 210             warn("ioctl(PPPIOCGFLAGS): %m");
 211         } else {
 212             x |= (kdebugflag & 0xFF) * SC_DEBUG;
 213             if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
 214                 warn("ioctl(PPPIOCSFLAGS): %m");
 215         }
 216     }
 217
 218     /*
 219      * Set device for non-blocking reads so PPPD can poll for
 220      * input from the kernel.
 221      */
 222     if ((initfdflags = fcntl(fd, F_GETFL)) == -1
 223         || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
 224         warn("Couldn't set device to non-blocking mode: %m");
 225     }
 226
 227 }
 228
 229
 230 /*
 231  * disestablish_ppp - Restore the serial port to normal operation.
 232  * This shouldn't call die() because it's called from die().
 233  */
 234 void
 235 disestablish_ppp(fd)
 236     int fd;
 237 {
 238     /* Reset non-blocking mode on fd. */
 239     if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
 240         warn("Couldn't restore device fd flags: %m");
 241     initfdflags = -1;
 242
 243     /* Restore old line discipline. */
 244     if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
 245         error("ioctl(TIOCSETD): %m");
 246     initdisc = -1;
 247 }
 248
 249 /*
 250  * Check whether the link seems not to be 8-bit clean.
 251  */
 252 void
 253 clean_check()
 254 {
 255     int x;
 256     char *s;
 257
 258     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
 259         s = NULL;
 260         switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
 261         case SC_RCV_B7_0:
 262             s = "bit 7 set to 1";
 263             break;
 264         case SC_RCV_B7_1:
 265             s = "bit 7 set to 0";
 266             break;
 267         case SC_RCV_EVNP:
 268             s = "odd parity";
 269             break;
 270         case SC_RCV_ODDP:
 271             s = "even parity";
 272             break;
 273         }
 274         if (s != NULL) {
 275             warn("Serial link is not 8-bit clean:");
 276             warn("All received characters had %s", s);
 277         }
 278     }
 279 }
 280
 281 /*
 282  * List of valid speeds.
 283  */
 284 struct speed {
 285     int speed_int, speed_val;
 286 } speeds[] = {
 287 #ifdef B50
 288     { 50, B50 },
 289 #endif
 290 #ifdef B75
 291     { 75, B75 },
 292 #endif
 293 #ifdef B110
 294     { 110, B110 },
 295 #endif
 296 #ifdef B134
 297     { 134, B134 },
 298 #endif
 299 #ifdef B150
 300     { 150, B150 },
 301 #endif
 302 #ifdef B200
 303     { 200, B200 },
 304 #endif
 305 #ifdef B300
 306     { 300, B300 },
 307 #endif
 308 #ifdef B600
 309     { 600, B600 },
 310 #endif
 311 #ifdef B1200
 312     { 1200, B1200 },
 313 #endif
 314 #ifdef B1800
 315     { 1800, B1800 },
 316 #endif
 317 #ifdef B2000
 318     { 2000, B2000 },
 319 #endif
 320 #ifdef B2400
 321     { 2400, B2400 },
 322 #endif
 323 #ifdef B3600
 324     { 3600, B3600 },
 325 #endif
 326 #ifdef B4800
 327     { 4800, B4800 },
 328 #endif
 329 #ifdef B7200
 330     { 7200, B7200 },
 331 #endif
 332 #ifdef B9600
 333     { 9600, B9600 },
 334 #endif
 335 #ifdef B19200
 336     { 19200, B19200 },
 337 #endif
 338 #ifdef B38400
 339     { 38400, B38400 },
 340 #endif
 341 #ifdef EXTA
 342     { 19200, EXTA },
 343 #endif
 344 #ifdef EXTB
 345     { 38400, EXTB },
 346 #endif
 347 #ifdef B14400
 348     { 14400, B14400 },
 349 #endif
 350 #ifdef B28800
 351     { 28800, B28800 },
 352 #endif
 353 #ifdef B43200
 354     { 43200, B43200 },
 355 #endif
 356 #ifdef B57600
 357     { 57600, B57600 },
 358 #endif
 359 /*
 360 #ifndef B115200
 361 #warning Defining B115200
 362 #define B115200 20
 363 #endif
 364 */
 365 #ifdef B115200
 366     { 115200, B115200 },
 367 #endif
 368     { 0, 0 }
 369 };
 370
 371 /*
 372  * Translate from bits/second to a speed_t.
 373  */
 374 int
 375 translate_speed(bps)
 376     int bps;
 377 {
 378     struct speed *speedp;
 379
 380     if (bps == 0)
 381         return 0;
 382     for (speedp = speeds; speedp->speed_int; speedp++)
 383         if (bps == speedp->speed_int)
 384             return speedp->speed_val;
 385     warn("speed %d not supported", bps);
 386     return 0;
 387 }
 388
 389 /*
 390  * Translate from a speed_t to bits/second.
 391  */
 392 static int
 393 baud_rate_of(speed)
 394     int speed;
 395 {
 396     struct speed *speedp;
 397
 398     if (speed == 0)
 399         return 0;
 400     for (speedp = speeds; speedp->speed_int; speedp++)
 401         if (speed == speedp->speed_val)
 402             return speedp->speed_int;
 403     return 0;
 404 }
 405
 406
 407 /*
 408  * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
 409  * at the requested speed, etc.  If `local' is true, set CLOCAL
 410  * regardless of whether the modem option was specified.
 411  */
 412 void
 413 set_up_tty(fd, local)
 414     int fd, local;
 415 {
 416     int speed, x, modembits;
 417     struct termios tios;
 418
 419     if (tcgetattr(fd, &tios) < 0)
 420         fatal("tcgetattr: %m");
 421
 422     if (!restore_term)
 423         inittermios = tios;
 424
 425     tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
 426
 427     tios.c_cflag |= CS8 | CREAD | HUPCL;
 428     if (local || !modem)
 429         tios.c_cflag |= CLOCAL;
 430
 431     tios.c_iflag = IGNBRK | IGNPAR;
 432     tios.c_oflag = 0;
 433     tios.c_lflag = 0;
 434     tios.c_cc[VMIN] = 1;
 435     tios.c_cc[VTIME] = 0;
 436
 437     if (crtscts == -2) {
 438         tios.c_iflag |= IXON | IXOFF;
 439         tios.c_cc[VSTOP] = 0x13;        /* DC3 = XOFF = ^S */
 440         tios.c_cc[VSTART] = 0x11;       /* DC1 = XON  = ^Q */
 441     }
 442
 443     speed = translate_speed(inspeed);
 444     if (speed) {
 445         cfsetospeed(&tios, speed);
 446         cfsetispeed(&tios, speed);
 447     } else {
 448         speed = cfgetospeed(&tios);
 449         /*
 450          * We can't proceed if the serial port speed is B0,
 451          * since that implies that the serial port is disabled.
 452          */
 453         if (speed == B0)
 454             fatal("Baud rate for %s is 0; need explicit baud rate",
 455                   devnam);
 456     }
 457
 458     if (modem) {
 459       modembits = TIOCM_RTS | TIOCM_CTS;
 460       if (ioctl(fd, (crtscts ? TIOCMBIS : TIOCMBIC), &modembits) < 0)
 461         error("ioctl: TIOCMBIS/BIC: %m");
 462     }
 463
 464     if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
 465         fatal("tcsetattr: %m");
 466
 467    baud_rate = inspeed = baud_rate_of(speed);
 468    restore_term = 1;
 469 }
 470
 471 /*
 472  * restore_tty - restore the terminal to the saved settings.
 473  */
 474 void
 475 restore_tty(fd)
 476     int fd;
 477 {
 478     if (restore_term) {
 479         if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
 480             if (errno != ENXIO)
 481                 warn("tcsetattr: %m");
 482         restore_term = 0;
 483     }
 484 }
 485
 486 /*
 487  * setdtr - control the DTR line on the serial port.
 488  * This is called from die(), so it shouldn't call die().
 489  *
 490  * The write hack is to get NXFax to recognize that there is
 491  * activity on the port.  Not using the write nukes
 492  * NXFax's capability to determine port usage.
 493  *
 494  */
 495 void
 496 setdtr(fd, on)
 497 int fd, on;
 498 {
 499     int modembits = TIOCM_DTR;
 500
 501     if (!on)
 502       {
 503         write(fd, " ", 1);
 504         sleep(1);
 505       }
 506
 507 /*    ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); */
 508     ioctl(fd, (on? TIOCSDTR: TIOCCDTR), 0);
 509 }
 510
 511
 512 /*
 513  * output - Output PPP packet.
 514  */
 515 void
 516 output(unit, p, len)
 517     int unit;
 518     u_char *p;
 519     int len;
 520 {
 521     if (debug)
 522         dbglog("sent %P", p, len);
 523
 524     if (write(ttyfd, p, len) < 0) {
 525         if (errno == EWOULDBLOCK || errno == ENOBUFS
 526             || errno == ENXIO || errno == EIO) {
 527             warn("write: warning: %m");
 528         } else {
 529             fatal("write: %m");
 530         }
 531     }
 532 }
 533
 534
 535 /*
 536  * wait_input - wait until there is data available,
 537  * for the length of time specified by *timo (indefinite
 538  * if timo is NULL).
 539  */
 540 void
 541 wait_input(timo)
 542     struct timeval *timo;
 543 {
 544     fd_set ready;
 545     int n;
 546
 547     ready = in_fds;
 548     n = select(max_in_fd + 1, &ready, NULL, &ready, timo);
 549     if (n < 0 && errno != EINTR)
 550         fatal("select: %m");
 551 }
 552
 553
 554 /*
 555  * add_fd - add an fd to the set that wait_input waits for.
 556  */
 557 void add_fd(int fd)
 558 {
 559     FD_SET(fd, &in_fds);
 560     if (fd > max_in_fd)
 561         max_in_fd = fd;
 562 }
 563
 564 /*
 565  * remove_fd - remove an fd from the set that wait_input waits for.
 566  */
 567 void remove_fd(int fd)
 568 {
 569     FD_CLR(fd, &in_fds);
 570 }
 571
 572 /*
 573  * read_packet - get a PPP packet from the serial device.
 574  */
 575 int
 576 read_packet(buf)
 577     u_char *buf;
 578 {
 579     int len;
 580
 581     if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
 582         if (errno == EWOULDBLOCK || errno == EINTR) {
 583             SYSDEBUG(("read: %m"));
 584             return -1;
 585         }
 586         fatal("read: %m");
 587     }
 588     return len;
 589 }
 590
 591
 592 /*
 593  * ppp_send_config - configure the transmit characteristics of
 594  * the ppp interface.
 595  */
 596 void
 597 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
 598     int unit, mtu;
 599     u_int32_t asyncmap;
 600     int pcomp, accomp;
 601 {
 602     u_int x;
 603     struct ifreq ifr;
 604
 605     strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
 606     ifr.ifr_mtu = mtu;
 607     if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
 608         fatal("ioctl(SIOCSIFMTU): %m");
 609
 610     if (ioctl(ttyfd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
 611         fatal("ioctl(PPPIOCSASYNCMAP): %m");
 612
 613     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
 614         fatal("ioctl(PPPIOCGFLAGS): %m");
 615
 616     x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
 617     x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
 618     if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
 619         fatal("ioctl(PPPIOCSFLAGS): %m");
 620 }
 621
 622
 623 /*
 624  * ppp_set_xaccm - set the extended transmit ACCM for the interface.
 625  */
 626 void
 627 ppp_set_xaccm(unit, accm)
 628     int unit;
 629     ext_accm accm;
 630 {
 631     if (ioctl(ttyfd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
 632         warn("ioctl(PPPIOCSXASYNCMAP): %m");
 633 }
 634
 635
 636 /*
 637  * ppp_recv_config - configure the receive-side characteristics of
 638  * the ppp interface.
 639  */
 640 void
 641 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
 642     int unit, mru;
 643     u_int32_t asyncmap;
 644     int pcomp, accomp;
 645 {
 646     int x;
 647
 648     if (ioctl(ttyfd, PPPIOCSMRU, (caddr_t) &mru) < 0)
 649         fatal("ioctl(PPPIOCSMRU): %m");
 650     if (ioctl(ttyfd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
 651         fatal("ioctl(PPPIOCSRASYNCMAP): %m");
 652     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
 653         fatal("ioctl(PPPIOCGFLAGS): %m");
 654     x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
 655     if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
 656         fatal("ioctl(PPPIOCSFLAGS): %m");
 657 }
 658
 659 /*
 660  * ccp_test - ask kernel whether a given compression method
 661  * is acceptable for use.
 662  */
 663 int
 664 ccp_test(unit, opt_ptr, opt_len, for_transmit)
 665     int unit, opt_len, for_transmit;
 666     u_char *opt_ptr;
 667 {
 668     struct ppp_option_data data;
 669
 670     data.ptr = opt_ptr;
 671     data.length = opt_len;
 672     data.transmit = for_transmit;
 673     if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
 674         return 1;
 675     return (errno == ENOBUFS)? 0: -1;
 676 }
 677
 678 /*
 679  * ccp_flags_set - inform kernel about the current state of CCP.
 680  */
 681 void
 682 ccp_flags_set(unit, isopen, isup)
 683     int unit, isopen, isup;
 684 {
 685     int x;
 686
 687     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 688         error("ioctl(PPPIOCGFLAGS): %m");
 689         return;
 690     }
 691     x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
 692     x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
 693     if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
 694         error("ioctl(PPPIOCSFLAGS): %m");
 695 }
 696
 697 /*
 698  * ccp_fatal_error - returns 1 if decompression was disabled as a
 699  * result of an error detected after decompression of a packet,
 700  * 0 otherwise.  This is necessary because of patent nonsense.
 701  */
 702 int
 703 ccp_fatal_error(unit)
 704     int unit;
 705 {
 706     int x;
 707
 708     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 709         error("ioctl(PPPIOCGFLAGS): %m");
 710         return 0;
 711     }
 712     return x & SC_DC_FERROR;
 713 }
 714
 715 /*
 716  * sifvjcomp - config tcp header compression
 717  */
 718 int
 719 sifvjcomp(u, vjcomp, cidcomp, maxcid)
 720     int u, vjcomp, cidcomp, maxcid;
 721 {
 722     u_int x;
 723
 724     if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 725         error("ioctl(PPIOCGFLAGS): %m");
 726         return 0;
 727     }
 728     x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
 729     x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
 730     if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
 731         error("ioctl(PPPIOCSFLAGS): %m");
 732         return 0;
 733     }
 734     if (ioctl(ttyfd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
 735         error("ioctl(PPPIOCSFLAGS): %m");
 736         return 0;
 737     }
 738     return 1;
 739 }
 740
 741 /*
 742  * sifup - Config the interface up and enable IP packets to pass.
 743  */
 744 #ifndef SC_ENABLE_IP
 745 #define SC_ENABLE_IP    0x100   /* compat for old versions of kernel code */
 746 #endif
 747
 748 int
 749 sifup(u)
 750     int u;
 751 {
 752     struct ifreq ifr;
 753     u_int x;
 754     struct npioctl npi;
 755
 756     strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
 757     if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 758         error("ioctl (SIOCGIFFLAGS): %m");
 759         return 0;
 760     }
 761     ifr.ifr_flags |= IFF_UP;
 762     if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 763         error("ioctl(SIOCSIFFLAGS): %m");
 764         return 0;
 765     }
 766     if_is_up = 1;
 767     npi.protocol = PPP_IP;
 768     npi.mode = NPMODE_PASS;
 769     if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
 770         if (errno != ENOTTY) {
 771             error("ioctl(PPPIOCSNPMODE): %m");
 772             return 0;
 773         }
 774         /* for backwards compatibility */
 775         if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 776             error("ioctl (PPPIOCGFLAGS): %m");
 777             return 0;
 778         }
 779         x |= SC_ENABLE_IP;
 780         if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
 781             error("ioctl(PPPIOCSFLAGS): %m");
 782             return 0;
 783         }
 784     }
 785     return 1;
 786 }
 787
 788 /*
 789  * sifdown - Config the interface down and disable IP.
 790  */
 791 int
 792 sifdown(u)
 793     int u;
 794 {
 795     struct ifreq ifr;
 796     u_int x;
 797     int rv;
 798     struct npioctl npi;
 799
 800     rv = 1;
 801     npi.protocol = PPP_IP;
 802     npi.mode = NPMODE_ERROR;
 803     ioctl(ttyfd, PPPIOCSNPMODE, (caddr_t) &npi);
 804     /* ignore errors, because ttyfd might have been closed by now. */
 805
 806
 807     strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
 808     if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 809         error("ioctl (SIOCGIFFLAGS): %m");
 810         rv = 0;
 811     } else {
 812         ifr.ifr_flags &= ~IFF_UP;
 813         if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 814             error("ioctl(SIOCSIFFLAGS): %m");
 815             rv = 0;
 816         } else
 817             if_is_up = 0;
 818     }
 819     return rv;
 820 }
 821
 822 /*
 823  * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
 824  * if it exists.
 825  */
 826 #define SET_SA_FAMILY(addr, family)             \
 827     BZERO((char *) &(addr), sizeof(addr));      \
 828     addr.sa_family = (family);
 829
 830 /*
 831  * sifaddr - Config the interface IP addresses and netmask.
 832  */
 833 int
 834 sifaddr(u, o, h, m)
 835     int u;
 836     u_int32_t o, h, m;
 837 {
 838     int ret;
 839     struct ifreq ifr;
 840
 841     ret = 1;
 842     strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
 843     SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
 844     ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
 845     if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
 846         error("ioctl(SIOCAIFADDR): %m");
 847         ret = 0;
 848     }
 849     ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
 850     if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
 851         error("ioctl(SIOCSIFDSTADDR): %m");
 852         ret = 0;
 853     }
 854     if (m != 0) {
 855         ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
 856         info("Setting interface mask to %s\n", ip_ntoa(m));
 857         if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
 858             error("ioctl(SIOCSIFNETMASK): %m");
 859             ret = 0;
 860         }
 861     }
 862     return ret;
 863 }
 864
 865 /*
 866  * cifaddr - Clear the interface IP addresses, and delete routes
 867  * through the interface if possible.
 868  *
 869  * N.B.: under NextStep, you can't *delete* an address on an interface,
 870  * so we change it to 0.0.0.0...  A real hack.  But it simplifies
 871  * reconnection on the server side.
 872  */
 873 int
 874 cifaddr(u, o, h)
 875     int u;
 876     u_int32_t o, h;
 877 {
 878     struct rtentry rt;
 879
 880 #if 1
 881     h = o = 0L;
 882     (void) sifaddr(u, o, h, 0L);
 883 #endif
 884     SET_SA_FAMILY(rt.rt_dst, AF_INET);
 885     ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
 886     SET_SA_FAMILY(rt.rt_gateway, AF_INET);
 887     ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
 888     rt.rt_flags = RTF_HOST;
 889     if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
 890         error("ioctl(SIOCDELRT): %m");
 891         return 0;
 892     }
 893     return 1;
 894 }
 895
 896 /*
 897  * sifdefaultroute - assign a default route through the address given.
 898  */
 899 int
 900 sifdefaultroute(u, l, g)
 901     int u;
 902     u_int32_t l, g;
 903 {
 904     return dodefaultroute(g, 's');
 905 }
 906
 907 /*
 908  * cifdefaultroute - delete a default route through the address given.
 909  */
 910 int
 911 cifdefaultroute(u, l, g)
 912     int u;
 913     u_int32_t l, g;
 914 {
 915     return dodefaultroute(g, 'c');
 916 }
 917
 918 /*
 919  * dodefaultroute - talk to a routing socket to add/delete a default route.
 920  */
 921 int
 922 dodefaultroute(g, cmd)
 923     u_int32_t g;
 924     int cmd;
 925 {
 926     struct rtentry rt;
 927
 928     SET_SA_FAMILY(rt.rt_dst, AF_INET);
 929     ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = 0L;
 930     SET_SA_FAMILY(rt.rt_gateway, AF_INET);
 931     ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
 932     rt.rt_flags = RTF_GATEWAY;
 933     if (ioctl(sockfd, (cmd == 's') ? SIOCADDRT : SIOCDELRT, &rt) < 0) {
 934         error("%cifdefaultroute: ioctl(%s): %m", cmd,
 935                (cmd == 's') ? "SIOCADDRT" : "SIOCDELRT");
 936         return 0;
 937     }
 938     default_route_gateway = (cmd == 's')? g: 0;
 939     return 1;
 940 }
 941
 942 /*
 943  * sifproxyarp - Make a proxy ARP entry for the peer.
 944  */
 945 int
 946 sifproxyarp(unit, hisaddr)
 947     int unit;
 948     u_int32_t hisaddr;
 949 {
 950     struct arpreq arpreq;
 951
 952     BZERO(&arpreq, sizeof(arpreq));
 953
 954     /*
 955      * Get the hardware address of an interface on the same subnet
 956      * as our local address.
 957      */
 958     if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
 959         error("Cannot determine ethernet address for proxy ARP");
 960         return 0;
 961     }
 962
 963     SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
 964     ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
 965     arpreq.arp_flags = ATF_PERM | ATF_PUBL;
 966     if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
 967         error("ioctl(SIOCSARP): %m");
 968         return 0;
 969     }
 970
 971     proxy_arp_addr = hisaddr;
 972     return 1;
 973 }
 974
 975 /*
 976  * cifproxyarp - Delete the proxy ARP entry for the peer.
 977  */
 978 int
 979 cifproxyarp(unit, hisaddr)
 980     int unit;
 981     u_int32_t hisaddr;
 982 {
 983     struct arpreq arpreq;
 984
 985     BZERO(&arpreq, sizeof(arpreq));
 986     SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
 987     ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
 988     if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
 989         warn("ioctl(SIOCDARP): %m");
 990         return 0;
 991     }
 992     proxy_arp_addr = 0;
 993     return 1;
 994 }
 995
 996 /*
 997  * get_ether_addr - get the hardware address of an interface on the
 998  * the same subnet as ipaddr.
 999  */
1000 #define MAX_IFS         32
1001
1002 int
1003 get_ether_addr(ipaddr, hwaddr)
1004     u_int32_t ipaddr;
1005     struct sockaddr *hwaddr;
1006 {
1007     struct ifreq *ifr, *ifend, *ifp;
1008     u_int32_t ina, mask;
1009     struct ether_addr dla;
1010     struct ifreq ifreq;
1011     struct ifconf ifc;
1012     struct ifreq ifs[MAX_IFS];
1013     struct hostent *hostent;
1014
1015     ifc.ifc_len = sizeof(ifs);
1016     ifc.ifc_req = ifs;
1017     if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1018         error("ioctl(SIOCGIFCONF): %m");
1019         return 0;
1020     }
1021
1022     /*
1023      * Scan through looking for an interface with an Internet
1024      * address on the same subnet as `ipaddr'.
1025      */
1026     ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1027     for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1028                 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1029         if (ifr->ifr_addr.sa_family == AF_INET) {
1030             ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1031             strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1032             /*
1033              * Check that the interface is up, and not point-to-point
1034              * or loopback.
1035              */
1036             if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1037                 continue;
1038             if ((ifreq.ifr_flags &
1039                  (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1040                  != (IFF_UP|IFF_BROADCAST))
1041                 continue;
1042             /*
1043              * Get its netmask and check that it's on the right subnet.
1044              */
1045             if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1046                 continue;
1047             mask = ((struct sockaddr_in*)&ifreq.ifr_addr)->sin_addr.s_addr;
1048             if ((ipaddr & mask) != (ina & mask))
1049                 continue;
1050
1051             break;
1052         }
1053     }
1054
1055     if (ifr >= ifend)
1056         return 0;
1057     info("found interface %s for proxy arp", ifr->ifr_name);
1058
1059     /*
1060      * Get the hostname and look for an entry using the ethers database.
1061      * Under NeXTStep this is the best we can do for now.
1062      */
1063     if ((hostent = gethostbyaddr((char*)&ina, sizeof(ina), AF_INET)) == NULL)
1064         return 0;
1065
1066     if (ether_by_host(hostent->h_name, &dla)) {
1067         info("Add entry for %s in /etc/ethers", hostent->h_name);
1068         return 0;       /* it's not there */
1069     }
1070     hwaddr->sa_family = AF_UNSPEC;
1071     BCOPY(&dla, hwaddr->sa_data, sizeof(dla));
1072     return 1;
1073 }
1074
1075 static int
1076 ether_by_host(hostname, etherptr)
1077     char *hostname;
1078     struct ether_addr *etherptr;
1079 {
1080     struct ether_addr *thisptr;
1081     void *conn;
1082     ni_id root;
1083     ni_namelist val;
1084     char path[256];
1085
1086     if (!ether_hostton(hostname, etherptr))
1087         return 0;
1088     /*
1089      * We shall now try and
1090      * find the address in the
1091      * top domain of netinfo.
1092      */
1093     slprintf(path, sizeof(path), "/machines/%s", hostname);
1094
1095     if (ni_open((void *)0, "/", &conn)
1096      || ni_root(conn, &root)
1097      || ni_pathsearch(conn, &root, path)
1098      || ni_lookupprop(conn, &root, "en_address", &val))
1099         return 1;
1100
1101     /*
1102      * Now we can convert the returned string into an ethernet address.
1103      */
1104     strlcpy(path, sizeof(path), val.ni_namelist_val[0]);
1105     ni_free(conn);
1106     if ((thisptr = (struct ether_addr*)ether_aton(path)) == NULL)
1107         return 1;
1108     BCOPY(thisptr, etherptr, sizeof(struct ether_addr));
1109     return 0;
1110 }
1111
1112
1113
1114 /*
1115  * Return user specified netmask, modified by any mask we might determine
1116  * for address `addr' (in network byte order).
1117  * Here we scan through the system's list of interfaces, looking for
1118  * any non-point-to-point interfaces which might appear to be on the same
1119  * network as `addr'.  If we find any, we OR in their netmask to the
1120  * user-specified netmask.
1121  */
1122 u_int32_t
1123 GetMask(addr)
1124     u_int32_t addr;
1125 {
1126     u_int32_t mask, nmask, ina;
1127     struct ifreq *ifr, *ifend, ifreq;
1128     struct ifconf ifc;
1129     struct ifreq ifs[MAX_IFS];
1130
1131     addr = ntohl(addr);
1132     if (IN_CLASSA(addr))        /* determine network mask for address class */
1133         nmask = IN_CLASSA_NET;
1134     else if (IN_CLASSB(addr))
1135         nmask = IN_CLASSB_NET;
1136     else
1137         nmask = IN_CLASSC_NET;
1138     /* class D nets are disallowed by bad_ip_adrs */
1139     mask = netmask | htonl(nmask);
1140
1141     /*
1142      * Scan through the system's network interfaces.
1143      */
1144     ifc.ifc_len = sizeof(ifs);
1145     ifc.ifc_req = ifs;
1146     if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1147         warn("ioctl(SIOCGIFCONF): %m");
1148         return mask;
1149     }
1150     ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1151     for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1152                 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1153         /*
1154          * Check the interface's internet address.
1155          */
1156         if (ifr->ifr_addr.sa_family != AF_INET)
1157             continue;
1158         ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1159         if ((ntohl(ina) & nmask) != (addr & nmask))
1160             continue;
1161         /*
1162          * Check that the interface is up, and not point-to-point or loopback.
1163          */
1164         strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1165         if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1166             continue;
1167         if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1168             != IFF_UP)
1169             continue;
1170         /*
1171          * Get its netmask and OR it into our mask.
1172          */
1173         if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1174             continue;
1175         mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1176     }
1177
1178     return mask;
1179 }
1180
1181 /*
1182  * have_route_to - determine if the system has any route to
1183  * a given IP address.
1184  * For demand mode to work properly, we have to ignore routes
1185  * through our own interface.
1186  */
1187 int have_route_to(u_int32_t addr)
1188 {
1189     return -1;
1190 }
1191
1192
1193 /*
1194  * daemon - Detach us from the terminal session.
1195  */
1196 int
1197 daemon(nochdir, noclose)
1198     int nochdir, noclose;
1199 {
1200     int pid;
1201
1202     if ((pid = fork()) < 0)
1203         return -1;
1204     if (pid != 0)
1205         exit(0);                /* parent dies */
1206     (void)setsid();
1207     if (!nochdir)
1208         chdir("/");
1209     if (!noclose) {
1210         fclose(stdin);          /* don't need stdin, stdout, stderr */
1211         fclose(stdout);
1212         fclose(stderr);
1213     }
1214     return 0;
1215 }
1216
1217
1218 char *
1219 strdup(s)
1220     const char *s;
1221 {
1222     char *d = malloc(strlen(s) + 1);
1223
1224     if (d) strcpy(d, s);
1225     return d;
1226 }
1227
1228 /*
1229  * This logwtmp() implementation is subject to the following copyright:
1230  *
1231  * Copyright (c) 1988 The Regents of the University of California.
1232  * All rights reserved.
1233  *
1234  * Redistribution and use in source and binary forms are permitted
1235  * provided that the above copyright notice and this paragraph are
1236  * duplicated in all such forms and that any documentation,
1237  * advertising materials, and other materials related to such
1238  * distribution and use acknowledge that the software was developed
1239  * by the University of California, Berkeley.  The name of the
1240  * University may not be used to endorse or promote products derived
1241  * from this software without specific prior written permission.
1242  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
1243  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
1244  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1245  */
1246
1247 #define WTMPFILE        "/usr/adm/wtmp"
1248
1249 void
1250 logwtmp(line, name, host)
1251     const char *line, *name, *host;
1252 {
1253     int fd;
1254     struct stat buf;
1255     struct utmp ut;
1256
1257     if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1258         return;
1259     if (!fstat(fd, &buf)) {
1260         strlcpy(ut.ut_line, sizeof(ut.ut_line), line);
1261         strlcpy(ut.ut_name, sizeof(ut.ut_name), name);
1262         strlcpy(ut.ut_host, sizeof(ut.ut_host), host);
1263         (void)time(&ut.ut_time);
1264         if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1265             (void)ftruncate(fd, buf.st_size);
1266     }
1267     close(fd);
1268 }
1269
1270 /*
1271  * Routines for locking and unlocking the serial device, moved here
1272  * from chat.c.
1273  */
1274
1275 #define LOCK_PREFIX     "/usr/spool/uucp/LCK/LCK.."
1276
1277 /*
1278  * lock - create a lock file for the named device
1279  */
1280 int
1281 lock(dev)
1282     char *dev;
1283 {
1284     int fd, pid, n;
1285     char *p;
1286     size_t l;
1287
1288     if ((p = strrchr(dev, '/')) != NULL)
1289         dev = p + 1;
1290     l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1291     lock_file = malloc(l);
1292     if (lock_file == NULL)
1293         novm("lock file name");
1294     slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1295
1296     while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1297         if (errno == EEXIST
1298             && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1299             /* Read the lock file to find out who has the device locked */
1300             n = read(fd, &pid, sizeof(pid));
1301             if (n <= 0) {
1302                 error("Can't read pid from lock file %s", lock_file);
1303                 close(fd);
1304             } else {
1305                 if (kill(pid, 0) == -1 && errno == ESRCH) {
1306                     /* pid no longer exists - remove the lock file */
1307                     if (unlink(lock_file) == 0) {
1308                         close(fd);
1309                         notice("Removed stale lock on %s (pid %d)",
1310                                dev, pid);
1311                         continue;
1312                     } else
1313                         warn("Couldn't remove stale lock on %s", dev);
1314                 } else
1315                     notice("Device %s is locked by pid %d",
1316                            dev, pid);
1317             }
1318             close(fd);
1319         } else
1320             error("Can't create lock file %s: %m", lock_file);
1321         free(lock_file);
1322         lock_file = NULL;
1323         return -1;
1324     }
1325
1326     pid = getpid();
1327     write(fd, &pid, sizeof pid);
1328
1329     close(fd);
1330     return 0;
1331 }
1332
1333 /*
1334  * unlock - remove our lockfile
1335  */
1336 void
1337 unlock()
1338 {
1339     if (lock_file) {
1340         unlink(lock_file);
1341         free(lock_file);
1342         lock_file = NULL;
1343     }
1344 }
1345
1346 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
1347 int
1348 ioctl(fd, cmd, c)
1349     int fd, cmd;
1350     caddr_t c;
1351 {
1352 #undef  ioctl
1353     int ret;
1354
1355 #ifdef DEBUGIOCTL
1356     int serrno;
1357     u_char let, code, size;
1358
1359     size = (cmd >> 16) & IOCPARM_MASK;
1360     let = (cmd >> 8);
1361     code = cmd;
1362
1363     if (let == 't' && (75 <= code && code <= 90))
1364     info("ioctl(%d, 0x%x ('%c', %d, %d), 0x%x)\n", fd, cmd,
1365            let, code, size, c);
1366 #endif
1367
1368     ret = ioctl(fd, cmd, c);
1369
1370 #ifdef DEBUGIOCTL
1371     serrno = errno;
1372     if (ret == -1)
1373         info("ioctl('%c', %d, %d) errno = %d (%m)\n",
1374                 let, code, size, errno);
1375     if (let == 't' && (75 <= code && code <= 90) && (cmd & IOC_OUT)) {
1376         int i, len = ((cmd >> 16) & IOCPARM_MASK);
1377         for (i = 0; i < len / 4; ++i)
1378                 info("word[%d] @ 0x%06x = 0x%x\n",
1379                        i, &((int *) c)[i],((int *)c)[i]);
1380     }
1381     errno = serrno;
1382 #endif
1383
1384     if (ret == -1 && errno == EPERM)
1385         errno = ret = 0;
1386     return ret;
1387 }
1388 #endif  /* HAS_BROKEN_IOCTL */
1389
1390
1391 #if defined(FIXSIGS) && (defined (hppa) || defined(sparc))
1392
1393 /*
1394  * These redefinitions of Posix functions are necessary
1395  * because HPPA systems have an OS bug that causes
1396  * sigaction to core dump:
1397  *
1398  * AlainF 9-Nov-1994    HACK FOR HP-PA/NEXTSTEP
1399  *                      sigaction(3) seems broken in the HP-PA NeXTSTEP 3.2
1400  *                      Posix lib. This causes pppd to SIGBUS at the expiration
1401  *                      of the first timeout (_sigtramp seems to invoke
1402  *                      the SIGALRM handler at an unreasonably low address).
1403  *                      All calls so sigaction(3) have been changed to calls
1404  *                      to sigvec(2) and sigprocmask(SIG_BLOCK,...) to
1405  *                      sigblock(2).
1406  *                      This is kind of a hack, especially since there are
1407  *                      other routines of the Posix lib still used, but
1408  *                      it worked for me.
1409  *
1410  * Dave Hess <David-Hess@net.tamu.edu> noted that 3.3 Sparc seems to
1411  * have the same bug.  Thus this fix has been enabled for SPARC also.
1412  *
1413  *
1414  */
1415
1416 int sigemptyset(sigset_t *mask)
1417 {
1418   *mask = 0;
1419 }
1420
1421 sigaddset(sigset_t *mask, int which_sig)
1422 {
1423   *mask |= sigmask(which_sig);
1424 }
1425
1426
1427 int sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
1428 {
1429    struct sigvec sv;
1430    static int in = 0;
1431
1432    sv.sv_handler = act->sa_handler;
1433    sv.sv_mask = act->sa_mask;
1434    sv.sv_flags = 0;
1435
1436    if (!in)
1437      {
1438        in = 1;
1439        warn("PPPD: Inside modified HP and SPARC sigaction\n");
1440      }
1441
1442    return sigvec(sig, &sv, NULL);
1443 }
1444
1445 #endif
1446
1447
1448 /*
1449  * Code following is added for 2.3 compatibility
1450  */
1451
1452 /*
1453  * get_idle_time - return how long the link has been idle.
1454  */
1455 int
1456 get_idle_time(u, ip)
1457     int u;
1458     struct ppp_idle *ip;
1459 {
1460   return (ioctl(ttyfd, PPPIOCGIDLE, ip) >= 0);
1461 }
1462
1463
1464 /*
1465  * get_loop_output - read characters from the loopback, form them
1466  * into frames, and detect when we want to bring the real link up.
1467  * Return value is 1 if we need to bring up the link, 0 otherwise.
1468  */
1469 int
1470 get_loop_output()
1471 {
1472
1473 #if 0
1474     int rv = 0;
1475     int n;
1476
1477     while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
1478         if (loop_chars(inbuf, n))
1479             rv = 1;
1480     }
1481
1482     if (n == 0)
1483         fatal("eof on loopback");
1484     if (errno != EWOULDBLOCK)
1485         fatal("read from loopback: %m");
1486
1487     return rv;
1488 #endif
1489
1490     return 0;
1491 }
1492
1493 /*
1494  * sifnpmode - Set the mode for handling packets for a given NP.
1495  */
1496 int
1497 sifnpmode(u, proto, mode)
1498     int u;
1499     int proto;
1500     enum NPmode mode;
1501 {
1502     struct npioctl npi;
1503
1504     npi.protocol = proto;
1505     npi.mode = mode;
1506     if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
1507         error("ioctl(set NP %d mode to %d): %m", proto, mode);
1508         return 0;
1509     }
1510     return 1;
1511 }
1512
1513
1514 /*
1515  * open_ppp_loopback - open the device we use for getting
1516  * packets in demand mode, and connect it to a ppp interface.
1517  * Here we use a pty.
1518  */
1519 void
1520 open_ppp_loopback()
1521 {
1522
1523 #if 0
1524     int flags;
1525     struct termios tios;
1526     int pppdisc = PPPDISC;
1527
1528     fatal("open_ppp_loopback called!");
1529
1530     if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0)
1531         fatal("No free pty for loopback");
1532     SYSDEBUG(("using %s for loopback", loop_name));
1533
1534     if (tcgetattr(loop_slave, &tios) == 0) {
1535         tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
1536         tios.c_cflag |= CS8 | CREAD;
1537         tios.c_iflag = IGNPAR;
1538         tios.c_oflag = 0;
1539         tios.c_lflag = 0;
1540         if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
1541             warn("couldn't set attributes on loopback: %m");
1542     }
1543
1544     if ((flags = fcntl(loop_master, F_GETFL)) != -1)
1545         if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
1546             warn("couldn't set loopback to nonblock: %m");
1547
1548     ttyfd = loop_slave;
1549     if (ioctl(ttyfd, TIOCSETD, &pppdisc) < 0)
1550         fatal("ioctl(TIOCSETD): %m");
1551
1552     /*
1553      * Find out which interface we were given.
1554      */
1555     if (ioctl(ttyfd, PPPIOCGUNIT, &ifunit) < 0)
1556         fatal("ioctl(PPPIOCGUNIT): %m");
1557
1558     /*
1559      * Enable debug in the driver if requested.
1560      */
1561     if (kdebugflag) {
1562         if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
1563             warn("ioctl (PPPIOCGFLAGS): %m");
1564         } else {
1565             flags |= (kdebugflag & 0xFF) * SC_DEBUG;
1566             if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
1567                 warn("ioctl(PPPIOCSFLAGS): %m");
1568         }
1569     }
1570
1571 #endif
1572
1573 }
1574
1575 /*
1576  * restore_loop - reattach the ppp unit to the loopback.
1577  */
1578 void
1579 restore_loop()
1580 {
1581     int x;
1582
1583     /*
1584      * Transfer the ppp interface back to the loopback.
1585      */
1586     if (ioctl(ttyfd, PPPIOCXFERUNIT, 0) < 0)
1587         fatal("ioctl(transfer ppp unit): %m");
1588     x = PPPDISC;
1589     if (ioctl(loop_slave, TIOCSETD, &x) < 0)
1590         fatal("ioctl(TIOCSETD): %m");
1591
1592     /*
1593      * Check that we got the same unit again.
1594      */
1595     if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0)
1596         fatal("ioctl(PPPIOCGUNIT): %m");
1597     if (x != ifunit)
1598         fatal("transfer_ppp failed: wanted unit %d, got %d",
1599               ifunit, x);
1600     ttyfd = loop_slave;
1601 }
1602
1603
1604 /*
1605  * Use the hostid as part of the random number seed.
1606  */
1607 int
1608 get_host_seed()
1609 {
1610     return gethostid();
1611 }
1612
1613
1614 /*
1615  * sys_check_options - check the options that the user specified
1616  */
1617 int
1618 sys_check_options()
1619 {
1620   /*
1621    * We don't support demand dialing yet.
1622    */
1623   if (demand)
1624     {
1625       option_error("PPP-2.3 for NeXTSTEP does not yet support demand dialing");
1626       return 0;
1627     }
1628   return 1;
1629 }
1630
1631
1632 /*
1633  * sys_close - Clean up in a child process before execing.
1634  */
1635 void
1636 sys_close()
1637 {
1638     close(sockfd);
1639     if (loop_slave >= 0) {
1640         close(loop_slave);
1641         close(loop_master);
1642     }
1643     closelog();
1644 }
1645
1646 #if 0
1647 /*
1648  * wait_loop_output - wait until there is data available on the
1649  * loopback, for the length of time specified by *timo (indefinite
1650  * if timo is NULL).
1651  */
1652 void wait_loop_output(timo)
1653     struct timeval *timo;
1654 {
1655     fd_set ready;
1656     int n;
1657
1658     FD_ZERO(&ready);
1659     FD_SET(loop_master, &ready);
1660     n = select(loop_master + 1, &ready, NULL, &ready, timo);
1661     if (n < 0 && errno != EINTR)
1662         fatal("select: %m");
1663 }
1664
1665 /*
1666  * wait_time - wait for a given length of time or until a
1667  * signal is received.
1668  */
1669 void wait_time(timo)
1670     struct timeval *timo;
1671 {
1672     int n;
1673
1674     n = select(0, NULL, NULL, NULL, timo);
1675     if (n < 0 && errno != EINTR)
1676         fatal("select: %m");
1677 }
1678 #endif