release/src/router/ppp/pppd/sys-solaris.c

   1 /*
   2  * System-dependent procedures for pppd under Solaris 2.
   3  *
   4  * Parts re-written by Adi Masputra <adi.masputra@sun.com>, based on
   5  * the original sys-svr4.c
   6  *
   7  * Copyright (c) 2000 by Sun Microsystems, Inc.
   8  * All rights reserved.
   9  *
  10  * Permission to use, copy, modify, and distribute this software and its
  11  * documentation is hereby granted, provided that the above copyright
  12  * notice appears in all copies.
  13  *
  14  * SUN MAKES NO REPRESENTATION OR WARRANTIES ABOUT THE SUITABILITY OF
  15  * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
  16  * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
  17  * PARTICULAR PURPOSE, OR NON-INFRINGEMENT.  SUN SHALL NOT BE LIABLE FOR
  18  * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
  19  * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES
  20  *
  21  * Copyright (c) 1994 The Australian National University.
  22  * All rights reserved.
  23  *
  24  * Permission to use, copy, modify, and distribute this software and its
  25  * documentation is hereby granted, provided that the above copyright
  26  * notice appears in all copies.  This software is provided without any
  27  * warranty, express or implied. The Australian National University
  28  * makes no representations about the suitability of this software for
  29  * any purpose.
  30  *
  31  * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
  32  * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  33  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
  34  * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
  35  * OF SUCH DAMAGE.
  36  *
  37  * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
  38  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  39  * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  40  * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
  41  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
  42  * OR MODIFICATIONS.
  43  */
  44
  45 #define RCSID   "$Id: sys-solaris.c,v 1.1.1.4 2003/10/14 08:09:53 sparq Exp $"
  46
  47 #include <limits.h>
  48 #include <stdio.h>
  49 #include <stddef.h>
  50 #include <stdlib.h>
  51 #include <ctype.h>
  52 #include <errno.h>
  53 #include <fcntl.h>
  54 #include <unistd.h>
  55 #include <termios.h>
  56 #ifndef CRTSCTS
  57 #include <sys/termiox.h>
  58 #endif
  59 #include <signal.h>
  60 #include <utmpx.h>
  61 #include <sys/types.h>
  62 #include <sys/ioccom.h>
  63 #include <sys/stream.h>
  64 #include <sys/stropts.h>
  65 #include <sys/socket.h>
  66 #include <sys/sockio.h>
  67 #include <sys/sysmacros.h>
  68 #include <sys/systeminfo.h>
  69 #include <sys/dlpi.h>
  70 #include <sys/stat.h>
  71 #include <sys/mkdev.h>
  72 #include <net/if.h>
  73 #include <net/if_arp.h>
  74 #include <net/route.h>
  75 #include <net/ppp_defs.h>
  76 #include <net/pppio.h>
  77 #include <netinet/in.h>
  78 #ifdef SOL2
  79 #include <sys/tihdr.h>
  80 #include <sys/tiuser.h>
  81 #include <inet/common.h>
  82 #include <inet/mib2.h>
  83 #include <sys/ethernet.h>
  84 #endif
  85
  86 #include "pppd.h"
  87 #include "fsm.h"
  88 #include "lcp.h"
  89 #include "ipcp.h"
  90 #include "ccp.h"
  91
  92 #if !defined(PPP_DRV_NAME)
  93 #define PPP_DRV_NAME    "ppp"
  94 #endif /* !defined(PPP_DRV_NAME) */
  95
  96 #if !defined(PPP_DEV_NAME)
  97 #define PPP_DEV_NAME    "/dev/" PPP_DRV_NAME
  98 #endif /* !defined(PPP_DEV_NAME) */
  99
 100 #if !defined(AHDLC_MOD_NAME)
 101 #define AHDLC_MOD_NAME  "ppp_ahdl"
 102 #endif /* !defined(AHDLC_MOD_NAME) */
 103
 104 #if !defined(COMP_MOD_NAME)
 105 #define COMP_MOD_NAME   "ppp_comp"
 106 #endif /* !defined(COMP_MOD_NAME) */
 107
 108 #if !defined(IP_DEV_NAME)
 109 #define IP_DEV_NAME     "/dev/ip"
 110 #endif /* !defined(IP_DEV_NAME) */
 111
 112 #if !defined(IP_MOD_NAME)
 113 #define IP_MOD_NAME     "ip"
 114 #endif /* !defined(IP_MOD_NAME) */
 115
 116 #if !defined(UDP_DEV_NAME) && defined(SOL2)
 117 #define UDP_DEV_NAME    "/dev/udp"
 118 #endif /* !defined(UDP_DEV_NAME) && defined(SOL2) */
 119
 120 #if !defined(UDP6_DEV_NAME) && defined(SOL2)
 121 #define UDP6_DEV_NAME   "/dev/udp6"
 122 #endif /* !defined(UDP6_DEV_NAME) && defined(SOL2) */
 123
 124 static const char rcsid[] = RCSID;
 125
 126 #if defined(SOL2)
 127 /*
 128  * "/dev/udp" is used as a multiplexor to PLINK the interface stream
 129  * under. It is used in place of "/dev/ip" since STREAMS will not let
 130  * a driver be PLINK'ed under itself, and "/dev/ip" is typically the
 131  * driver at the bottom of the tunneling interfaces stream.
 132  */
 133 static char *mux_dev_name = UDP_DEV_NAME;
 134 #else
 135 static char *mux_dev_name = IP_DEV_NAME;
 136 #endif
 137 static int      pppfd;
 138 static int      fdmuxid = -1;
 139 static int      ipfd;
 140 static int      ipmuxid = -1;
 141
 142 #if defined(INET6) && defined(SOL2)
 143 static int      ip6fd;          /* IP file descriptor */
 144 static int      ip6muxid = -1;  /* Multiplexer file descriptor */
 145 static int      if6_is_up = 0;  /* IPv6 interface has been marked up */
 146
 147 #define _IN6_LLX_FROM_EUI64(l, s, eui64, as) do {       \
 148         s->sin6_addr.s6_addr32[0] = htonl(as);  \
 149         eui64_copy(eui64, s->sin6_addr.s6_addr32[2]);   \
 150         s->sin6_family = AF_INET6;              \
 151         l.lifr_addr.ss_family = AF_INET6;       \
 152         l.lifr_addrlen = 10;                    \
 153         l.lifr_addr = laddr;                    \
 154         } while (0)
 155
 156 #define IN6_LLADDR_FROM_EUI64(l, s, eui64)  \
 157     _IN6_LLX_FROM_EUI64(l, s, eui64, 0xfe800000)
 158
 159 #define IN6_LLTOKEN_FROM_EUI64(l, s, eui64) \
 160     _IN6_LLX_FROM_EUI64(l, s, eui64, 0)
 161
 162 #endif /* defined(INET6) && defined(SOL2) */
 163
 164 #if defined(INET6) && defined(SOL2)
 165 static char     first_ether_name[LIFNAMSIZ];    /* Solaris 8 and above */
 166 #else
 167 static char     first_ether_name[IFNAMSIZ];     /* Before Solaris 8 */
 168 #define MAXIFS          256                     /* Max # of interfaces */
 169 #endif /* defined(INET6) && defined(SOL2) */
 170
 171 static int      restore_term;
 172 static struct termios inittermios;
 173 #ifndef CRTSCTS
 174 static struct termiox inittermiox;
 175 static int      termiox_ok;
 176 #endif
 177 static struct winsize wsinfo;   /* Initial window size info */
 178 static pid_t    tty_sid;        /* original session ID for terminal */
 179
 180 extern u_char   inpacket_buf[]; /* borrowed from main.c */
 181
 182 #define MAX_POLLFDS     32
 183 static struct pollfd pollfds[MAX_POLLFDS];
 184 static int n_pollfds;
 185
 186 static int      link_mtu, link_mru;
 187
 188 #define NMODULES        32
 189 static int      tty_nmodules;
 190 static char     tty_modules[NMODULES][FMNAMESZ+1];
 191 static int      tty_npushed;
 192
 193 static int      if_is_up;       /* Interface has been marked up */
 194 static u_int32_t remote_addr;           /* IP address of peer */
 195 static u_int32_t default_route_gateway; /* Gateway for default route added */
 196 static u_int32_t proxy_arp_addr;        /* Addr for proxy arp entry added */
 197
 198 /* Prototypes for procedures local to this file. */
 199 static int translate_speed __P((int));
 200 static int baud_rate_of __P((int));
 201 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
 202 static int get_hw_addr __P((char *, u_int32_t, struct sockaddr *));
 203 static int get_hw_addr_dlpi __P((char *, struct sockaddr *));
 204 static int dlpi_attach __P((int, int));
 205 static int dlpi_info_req __P((int));
 206 static int dlpi_get_reply __P((int, union DL_primitives *, int, int));
 207 static int strioctl __P((int, int, void *, int, int));
 208
 209 #ifdef SOL2
 210 /*
 211  * sifppa - Sets interface ppa
 212  *
 213  * without setting the ppa, ip module will return EINVAL upon setting the
 214  * interface UP (SIOCSxIFFLAGS). This is because ip module in 2.8 expects
 215  * two DLPI_INFO_REQ to be sent down to the driver (below ip) before
 216  * IFF_UP can be set. Plumbing the device causes one DLPI_INFO_REQ to
 217  * be sent down, and the second DLPI_INFO_REQ is sent upon receiving
 218  * IF_UNITSEL (old) or SIOCSLIFNAME (new) ioctls. Such setting of the ppa
 219  * is required because the ppp DLPI provider advertises itself as
 220  * a DLPI style 2 type, which requires a point of attachment to be
 221  * specified. The only way the user can specify a point of attachment
 222  * is via SIOCSLIFNAME or IF_UNITSEL.
 223  *
 224  * Such changes in the behavior of ip module was made to meet new or
 225  * evolving standards requirements.
 226  *
 227  */
 228 static int
 229 sifppa(fd, ppa)
 230     int fd;
 231     int ppa;
 232 {
 233     return (int)ioctl(fd, IF_UNITSEL, (char *)&ppa);
 234 }
 235 #endif /* SOL2 */
 236
 237 #if defined(SOL2) && defined(INET6)
 238 /*
 239  * get_first_ethernet - returns the first Ethernet interface name found in
 240  * the system, or NULL if none is found
 241  *
 242  * NOTE: This is the lifreq version (Solaris 8 and above)
 243  */
 244 char *
 245 get_first_ethernet()
 246 {
 247     struct lifnum lifn;
 248     struct lifconf lifc;
 249     struct lifreq *plifreq;
 250     struct lifreq lifr;
 251     int fd, num_ifs, i, found;
 252     uint_t fl, req_size;
 253     char *req;
 254
 255     fd = socket(AF_INET, SOCK_DGRAM, 0);
 256     if (fd < 0) {
 257         return 0;
 258     }
 259
 260     /*
 261      * Find out how many interfaces are running
 262      */
 263     lifn.lifn_family = AF_UNSPEC;
 264     lifn.lifn_flags = LIFC_NOXMIT;
 265     if (ioctl(fd, SIOCGLIFNUM, &lifn) < 0) {
 266         close(fd);
 267         error("could not determine number of interfaces: %m");
 268         return 0;
 269     }
 270
 271     num_ifs = lifn.lifn_count;
 272     req_size = num_ifs * sizeof(struct lifreq);
 273     req = malloc(req_size);
 274     if (req == NULL) {
 275         close(fd);
 276         error("out of memory");
 277         return 0;
 278     }
 279
 280     /*
 281      * Get interface configuration info for all interfaces
 282      */
 283     lifc.lifc_family = AF_UNSPEC;
 284     lifc.lifc_flags = LIFC_NOXMIT;
 285     lifc.lifc_len = req_size;
 286     lifc.lifc_buf = req;
 287     if (ioctl(fd, SIOCGLIFCONF, &lifc) < 0) {
 288         close(fd);
 289         free(req);
 290         error("SIOCGLIFCONF: %m");
 291         return 0;
 292     }
 293
 294     /*
 295      * And traverse each interface to look specifically for the first
 296      * occurence of an Ethernet interface which has been marked up
 297      */
 298     plifreq = lifc.lifc_req;
 299     found = 0;
 300     for (i = lifc.lifc_len / sizeof(struct lifreq); i > 0; i--, plifreq++) {
 301
 302         if (strchr(plifreq->lifr_name, ':') != NULL)
 303             continue;
 304
 305         memset(&lifr, 0, sizeof(lifr));
 306         strncpy(lifr.lifr_name, plifreq->lifr_name, sizeof(lifr.lifr_name));
 307         if (ioctl(fd, SIOCGLIFFLAGS, &lifr) < 0) {
 308             close(fd);
 309             free(req);
 310             error("SIOCGLIFFLAGS: %m");
 311             return 0;
 312         }
 313         fl = lifr.lifr_flags;
 314
 315         if ((fl & (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
 316                 != (IFF_UP | IFF_BROADCAST))
 317             continue;
 318
 319         found = 1;
 320         break;
 321     }
 322     free(req);
 323     close(fd);
 324
 325     if (found) {
 326         strncpy(first_ether_name, lifr.lifr_name, sizeof(first_ether_name));
 327         return (char *)first_ether_name;
 328     } else
 329         return NULL;
 330 }
 331 #else
 332 /*
 333  * get_first_ethernet - returns the first Ethernet interface name found in
 334  * the system, or NULL if none is found
 335  *
 336  * NOTE: This is the ifreq version (before Solaris 8).
 337  */
 338 char *
 339 get_first_ethernet()
 340 {
 341     struct ifconf ifc;
 342     struct ifreq *pifreq;
 343     struct ifreq ifr;
 344     int fd, num_ifs, i, found;
 345     uint_t fl, req_size;
 346     char *req;
 347
 348     fd = socket(AF_INET, SOCK_DGRAM, 0);
 349     if (fd < 0) {
 350         return 0;
 351     }
 352
 353     /*
 354      * Find out how many interfaces are running
 355      */
 356     if (ioctl(fd, SIOCGIFNUM, (char *)&num_ifs) < 0) {
 357         num_ifs = MAXIFS;
 358     }
 359
 360     req_size = num_ifs * sizeof(struct ifreq);
 361     req = malloc(req_size);
 362     if (req == NULL) {
 363         close(fd);
 364         error("out of memory");
 365         return 0;
 366     }
 367
 368     /*
 369      * Get interface configuration info for all interfaces
 370      */
 371     ifc.ifc_len = req_size;
 372     ifc.ifc_buf = req;
 373     if (ioctl(fd, SIOCGIFCONF, &ifc) < 0) {
 374         close(fd);
 375         free(req);
 376         error("SIOCGIFCONF: %m");
 377         return 0;
 378     }
 379
 380     /*
 381      * And traverse each interface to look specifically for the first
 382      * occurence of an Ethernet interface which has been marked up
 383      */
 384     pifreq = ifc.ifc_req;
 385     found = 0;
 386     for (i = ifc.ifc_len / sizeof(struct ifreq); i > 0; i--, pifreq++) {
 387
 388         if (strchr(pifreq->ifr_name, ':') != NULL)
 389             continue;
 390
 391         memset(&ifr, 0, sizeof(ifr));
 392         strncpy(ifr.ifr_name, pifreq->ifr_name, sizeof(ifr.ifr_name));
 393         if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
 394             close(fd);
 395             free(req);
 396             error("SIOCGIFFLAGS: %m");
 397             return 0;
 398         }
 399         fl = ifr.ifr_flags;
 400
 401         if ((fl & (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
 402                 != (IFF_UP | IFF_BROADCAST))
 403             continue;
 404
 405         found = 1;
 406         break;
 407     }
 408     free(req);
 409     close(fd);
 410
 411     if (found) {
 412         strncpy(first_ether_name, ifr.ifr_name, sizeof(first_ether_name));
 413         return (char *)first_ether_name;
 414     } else
 415         return NULL;
 416 }
 417 #endif /* defined(SOL2) && defined(INET6) */
 418
 419 #if defined(SOL2)
 420 /*
 421  * get_if_hwaddr - get the hardware address for the specified
 422  * network interface device.
 423  */
 424 int
 425 get_if_hwaddr(u_char *addr, char *if_name)
 426 {
 427     struct sockaddr s_eth_addr;
 428     struct ether_addr *eth_addr = (struct ether_addr *)&s_eth_addr.sa_data;
 429
 430     if (if_name == NULL)
 431         return -1;
 432
 433     /*
 434      * Send DL_INFO_REQ to the driver to solicit its MAC address
 435      */
 436     if (!get_hw_addr_dlpi(if_name, &s_eth_addr)) {
 437         error("could not obtain hardware address for %s", if_name);
 438         return -1;
 439     }
 440
 441     memcpy(addr, eth_addr->ether_addr_octet, 6);
 442     return 1;
 443 }
 444 #endif /* SOL2 */
 445
 446 #if defined(SOL2) && defined(INET6)
 447 /*
 448  * slifname - Sets interface ppa and flags
 449  *
 450  * in addition to the comments stated in sifppa(), IFF_IPV6 bit must
 451  * be set in order to declare this as an IPv6 interface
 452  */
 453 static int
 454 slifname(fd, ppa)
 455     int fd;
 456     int ppa;
 457 {
 458     struct  lifreq lifr;
 459     int     ret;
 460
 461     memset(&lifr, 0, sizeof(lifr));
 462     ret = ioctl(fd, SIOCGLIFFLAGS, &lifr);
 463     if (ret < 0)
 464         goto slifname_done;
 465
 466     lifr.lifr_flags |= IFF_IPV6;
 467     lifr.lifr_flags &= ~(IFF_BROADCAST | IFF_IPV4);
 468     lifr.lifr_ppa = ppa;
 469     strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
 470
 471     ret = ioctl(fd, SIOCSLIFNAME, &lifr);
 472
 473 slifname_done:
 474     return ret;
 475
 476
 477 }
 478
 479
 480 /*
 481  * ether_to_eui64 - Convert 48-bit Ethernet address into 64-bit EUI
 482  *
 483  * walks the list of valid ethernet interfaces, and convert the first
 484  * found 48-bit MAC address into EUI 64. caller also assumes that
 485  * the system has a properly configured Ethernet interface for this
 486  * function to return non-zero.
 487  */
 488 int
 489 ether_to_eui64(eui64_t *p_eui64)
 490 {
 491     struct sockaddr s_eth_addr;
 492     struct ether_addr *eth_addr = (struct ether_addr *)&s_eth_addr.sa_data;
 493     char *if_name;
 494
 495     if ((if_name = get_first_ethernet()) == NULL) {
 496         error("no persistent id can be found");
 497         return 0;
 498     }
 499
 500     /*
 501      * Send DL_INFO_REQ to the driver to solicit its MAC address
 502      */
 503     if (!get_hw_addr_dlpi(if_name, &s_eth_addr)) {
 504         error("could not obtain hardware address for %s", if_name);
 505         return 0;
 506     }
 507
 508     /*
 509      * And convert the EUI-48 into EUI-64, per RFC 2472 [sec 4.1]
 510      */
 511     p_eui64->e8[0] = (eth_addr->ether_addr_octet[0] & 0xFF) | 0x02;
 512     p_eui64->e8[1] = (eth_addr->ether_addr_octet[1] & 0xFF);
 513     p_eui64->e8[2] = (eth_addr->ether_addr_octet[2] & 0xFF);
 514     p_eui64->e8[3] = 0xFF;
 515     p_eui64->e8[4] = 0xFE;
 516     p_eui64->e8[5] = (eth_addr->ether_addr_octet[3] & 0xFF);
 517     p_eui64->e8[6] = (eth_addr->ether_addr_octet[4] & 0xFF);
 518     p_eui64->e8[7] = (eth_addr->ether_addr_octet[5] & 0xFF);
 519
 520     return 1;
 521 }
 522 #endif /* defined(SOL2) && defined(INET6) */
 523
 524 /*
 525  * sys_init - System-dependent initialization.
 526  */
 527 void
 528 sys_init()
 529 {
 530     int ifd, x;
 531     struct ifreq ifr;
 532 #if defined(INET6) && defined(SOL2)
 533     int i6fd;
 534     struct lifreq lifr;
 535 #endif /* defined(INET6) && defined(SOL2) */
 536 #if !defined(SOL2)
 537     struct {
 538         union DL_primitives prim;
 539         char space[64];
 540     } reply;
 541 #endif /* !defined(SOL2) */
 542
 543     ipfd = open(mux_dev_name, O_RDWR, 0);
 544     if (ipfd < 0)
 545         fatal("Couldn't open IP device: %m");
 546
 547 #if defined(INET6) && defined(SOL2)
 548     ip6fd = open(UDP6_DEV_NAME, O_RDWR, 0);
 549     if (ip6fd < 0)
 550         fatal("Couldn't open IP device (2): %m");
 551 #endif /* defined(INET6) && defined(SOL2) */
 552
 553     if (default_device && !notty)
 554         tty_sid = getsid((pid_t)0);
 555
 556     pppfd = open(PPP_DEV_NAME, O_RDWR | O_NONBLOCK, 0);
 557     if (pppfd < 0)
 558         fatal("Can't open %s: %m", PPP_DEV_NAME);
 559     if (kdebugflag & 1) {
 560         x = PPPDBG_LOG + PPPDBG_DRIVER;
 561         strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
 562     }
 563
 564     /* Assign a new PPA and get its unit number. */
 565     if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0)
 566         fatal("Can't create new PPP interface: %m");
 567
 568 #if defined(SOL2)
 569     /*
 570      * Since sys_init() is called prior to ifname being set in main(),
 571      * we need to get the ifname now, otherwise slifname(), and others,
 572      * will fail, or maybe, I should move them to a later point ?
 573      * <adi.masputra@sun.com>
 574      */
 575     sprintf(ifname, PPP_DRV_NAME "%d", ifunit);
 576 #endif /* defined(SOL2) */
 577     /*
 578      * Open the ppp device again and link it under the ip multiplexor.
 579      * IP will assign a unit number which hopefully is the same as ifunit.
 580      * I don't know any way to be certain they will be the same. :-(
 581      */
 582     ifd = open(PPP_DEV_NAME, O_RDWR, 0);
 583     if (ifd < 0)
 584         fatal("Can't open %s (2): %m", PPP_DEV_NAME);
 585     if (kdebugflag & 1) {
 586         x = PPPDBG_LOG + PPPDBG_DRIVER;
 587         strioctl(ifd, PPPIO_DEBUG, &x, sizeof(int), 0);
 588     }
 589
 590 #if defined(INET6) && defined(SOL2)
 591     i6fd = open(PPP_DEV_NAME, O_RDWR, 0);
 592     if (i6fd < 0) {
 593         close(ifd);
 594         fatal("Can't open %s (3): %m", PPP_DEV_NAME);
 595     }
 596     if (kdebugflag & 1) {
 597         x = PPPDBG_LOG + PPPDBG_DRIVER;
 598         strioctl(i6fd, PPPIO_DEBUG, &x, sizeof(int), 0);
 599     }
 600 #endif /* defined(INET6) && defined(SOL2) */
 601
 602 #if defined(SOL2)
 603     if (ioctl(ifd, I_PUSH, IP_MOD_NAME) < 0) {
 604         close(ifd);
 605 #if defined(INET6)
 606         close(i6fd);
 607 #endif /* defined(INET6) */
 608         fatal("Can't push IP module: %m");
 609     }
 610
 611     /*
 612      * Assign ppa according to the unit number returned by ppp device
 613      * after plumbing is completed above.
 614      */
 615     if (sifppa(ifd, ifunit) < 0) {
 616         close (ifd);
 617 #if defined(INET6)
 618         close(i6fd);
 619 #endif /* defined(INET6) */
 620         fatal("Can't set ppa for unit %d: %m", ifunit);
 621     }
 622
 623 #if defined(INET6)
 624     /*
 625      * An IPv6 interface is created anyway, even when the user does not
 626      * explicitly enable it. Note that the interface will be marked
 627      * IPv6 during slifname().
 628      */
 629     if (ioctl(i6fd, I_PUSH, IP_MOD_NAME) < 0) {
 630         close(ifd);
 631         close(i6fd);
 632         fatal("Can't push IP module (2): %m");
 633     }
 634
 635     /*
 636      * Assign ppa according to the unit number returned by ppp device
 637      * after plumbing is completed above. In addition, mark the interface
 638      * as an IPv6 interface.
 639      */
 640     if (slifname(i6fd, ifunit) < 0) {
 641         close(ifd);
 642         close(i6fd);
 643         fatal("Can't set ifname for unit %d: %m", ifunit);
 644     }
 645 #endif /* defined(INET6) */
 646
 647     ipmuxid = ioctl(ipfd, I_PLINK, ifd);
 648     close(ifd);
 649     if (ipmuxid < 0) {
 650 #if defined(INET6)
 651         close(i6fd);
 652 #endif /* defined(INET6) */
 653         fatal("Can't I_PLINK PPP device to IP: %m");
 654     }
 655
 656     memset(&ifr, 0, sizeof(ifr));
 657     sprintf(ifr.ifr_name, "%s", ifname);
 658     ifr.ifr_ip_muxid = ipmuxid;
 659
 660     /*
 661      * In Sol 8 and later, STREAMS dynamic module plumbing feature exists.
 662      * This is so that an arbitrary module can be inserted, or deleted,
 663      * between ip module and the device driver without tearing down the
 664      * existing stream. Such feature requires the mux ids, which is set
 665      * by SIOCSIFMUXID (or SIOCLSIFMUXID).
 666      */
 667     if (ioctl(ipfd, SIOCSIFMUXID, &ifr) < 0) {
 668         ioctl(ipfd, I_PUNLINK, ipmuxid);
 669 #if defined(INET6)
 670         close(i6fd);
 671 #endif /* defined(INET6) */
 672         fatal("SIOCSIFMUXID: %m");
 673     }
 674
 675 #else /* else if !defined(SOL2) */
 676
 677     if (dlpi_attach(ifd, ifunit) < 0 ||
 678         dlpi_get_reply(ifd, &reply.prim, DL_OK_ACK, sizeof(reply)) < 0) {
 679         close(ifd);
 680         fatal("Can't attach to ppp%d: %m", ifunit);
 681     }
 682
 683     ipmuxid = ioctl(ipfd, I_LINK, ifd);
 684     close(ifd);
 685     if (ipmuxid < 0)
 686         fatal("Can't link PPP device to IP: %m");
 687 #endif /* defined(SOL2) */
 688
 689 #if defined(INET6) && defined(SOL2)
 690     ip6muxid = ioctl(ip6fd, I_PLINK, i6fd);
 691     close(i6fd);
 692     if (ip6muxid < 0) {
 693         ioctl(ipfd, I_PUNLINK, ipmuxid);
 694         fatal("Can't I_PLINK PPP device to IP (2): %m");
 695     }
 696
 697     memset(&lifr, 0, sizeof(lifr));
 698     sprintf(lifr.lifr_name, "%s", ifname);
 699     lifr.lifr_ip_muxid = ip6muxid;
 700
 701     /*
 702      * Let IP know of the mux id [see comment for SIOCSIFMUXID above]
 703      */
 704     if (ioctl(ip6fd, SIOCSLIFMUXID, &lifr) < 0) {
 705         ioctl(ipfd, I_PUNLINK, ipmuxid);
 706         ioctl(ip6fd, I_PUNLINK, ip6muxid);
 707         fatal("Can't link PPP device to IP (2): %m");
 708     }
 709 #endif /* defined(INET6) && defined(SOL2) */
 710
 711 #if !defined(SOL2)
 712     /* Set the interface name for the link. */
 713     slprintf(ifr.ifr_name, sizeof(ifr.ifr_name), PPP_DRV_NAME "%d", ifunit);
 714     ifr.ifr_metric = ipmuxid;
 715     if (strioctl(ipfd, SIOCSIFNAME, (char *)&ifr, sizeof ifr, 0) < 0)
 716         fatal("Can't set interface name %s: %m", ifr.ifr_name);
 717 #endif /* !defined(SOL2) */
 718
 719     n_pollfds = 0;
 720 }
 721
 722 /*
 723  * sys_cleanup - restore any system state we modified before exiting:
 724  * mark the interface down, delete default route and/or proxy arp entry.
 725  * This should call die() because it's called from die().
 726  */
 727 void
 728 sys_cleanup()
 729 {
 730 #if defined(SOL2)
 731     struct ifreq ifr;
 732 #if defined(INET6)
 733     struct lifreq lifr;
 734 #endif /* defined(INET6) */
 735 #endif /* defined(SOL2) */
 736
 737 #if defined(SOL2) && defined(INET6)
 738     if (if6_is_up)
 739         sif6down(0);
 740 #endif /* defined(SOL2) && defined(INET6) */
 741     if (if_is_up)
 742         sifdown(0);
 743     if (default_route_gateway)
 744         cifdefaultroute(0, default_route_gateway, default_route_gateway);
 745     if (proxy_arp_addr)
 746         cifproxyarp(0, proxy_arp_addr);
 747 #if defined(SOL2)
 748     /*
 749      * Make sure we ask ip what the muxid, because 'ifconfig modlist' will
 750      * unlink and re-link the modules, causing the muxid to change.
 751      */
 752     memset(&ifr, 0, sizeof(ifr));
 753     sprintf(ifr.ifr_name, "%s", ifname);
 754     if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {
 755         error("SIOCGIFFLAGS: %m");
 756         return;
 757     }
 758
 759     if (ioctl(ipfd, SIOCGIFMUXID, &ifr) < 0) {
 760         error("SIOCGIFMUXID: %m");
 761         return;
 762     }
 763
 764     ipmuxid = ifr.ifr_ip_muxid;
 765
 766     if (ioctl(ipfd, I_PUNLINK, ipmuxid) < 0) {
 767         error("Can't I_PUNLINK PPP from IP: %m");
 768         return;
 769     }
 770 #if defined(INET6)
 771     /*
 772      * Make sure we ask ip what the muxid, because 'ifconfig modlist' will
 773      * unlink and re-link the modules, causing the muxid to change.
 774      */
 775     memset(&lifr, 0, sizeof(lifr));
 776     sprintf(lifr.lifr_name, "%s", ifname);
 777     if (ioctl(ip6fd, SIOCGLIFFLAGS, &lifr) < 0) {
 778         error("SIOCGLIFFLAGS: %m");
 779         return;
 780     }
 781
 782     if (ioctl(ip6fd, SIOCGLIFMUXID, &lifr) < 0) {
 783         error("SIOCGLIFMUXID: %m");
 784         return;
 785     }
 786
 787     ip6muxid = lifr.lifr_ip_muxid;
 788
 789     if (ioctl(ip6fd, I_PUNLINK, ip6muxid) < 0) {
 790         error("Can't I_PUNLINK PPP from IP (2): %m");
 791     }
 792 #endif /* defined(INET6) */
 793 #endif /* defined(SOL2) */
 794 }
 795
 796 /*
 797  * sys_close - Clean up in a child process before execing.
 798  */
 799 void
 800 sys_close()
 801 {
 802     close(ipfd);
 803 #if defined(INET6) && defined(SOL2)
 804     close(ip6fd);
 805 #endif /* defined(INET6) && defined(SOL2) */
 806     if (pppfd >= 0)
 807         close(pppfd);
 808 }
 809
 810 /*
 811  * sys_check_options - check the options that the user specified
 812  */
 813 int
 814 sys_check_options()
 815 {
 816     return 1;
 817 }
 818
 819
 820 /*
 821  * ppp_available - check whether the system has any ppp interfaces
 822  */
 823 int
 824 ppp_available()
 825 {
 826     struct stat buf;
 827
 828     return stat(PPP_DEV_NAME, &buf) >= 0;
 829 }
 830
 831 /*
 832  * any_compressions - see if compression is enabled or not
 833  *
 834  * In the STREAMS implementation of kernel-portion pppd,
 835  * the comp STREAMS module performs the ACFC, PFC, as well
 836  * CCP and VJ compressions. However, if the user has explicitly
 837  * declare to not enable them from the command line, there is
 838  * no point of having the comp module be pushed on the stream.
 839  */
 840 static int
 841 any_compressions()
 842 {
 843     if ((!lcp_wantoptions[0].neg_accompression) &&
 844         (!lcp_wantoptions[0].neg_pcompression) &&
 845         (!ccp_protent.enabled_flag) &&
 846         (!ipcp_wantoptions[0].neg_vj)) {
 847             return 0;
 848     }
 849     return 1;
 850 }
 851
 852 /*
 853  * tty_establish_ppp - Turn the serial port into a ppp interface.
 854  */
 855 int
 856 tty_establish_ppp(fd)
 857     int fd;
 858 {
 859     int i;
 860
 861     /* Pop any existing modules off the tty stream. */
 862     for (i = 0;; ++i)
 863         if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
 864             || strcmp(tty_modules[i], "ptem") == 0
 865             || ioctl(fd, I_POP, 0) < 0)
 866             break;
 867     tty_nmodules = i;
 868
 869     /* Push the async hdlc module and the compressor module. */
 870     tty_npushed = 0;
 871
 872     if(!sync_serial) {
 873         if (ioctl(fd, I_PUSH, AHDLC_MOD_NAME) < 0) {
 874             error("Couldn't push PPP Async HDLC module: %m");
 875             return -1;
 876         }
 877         ++tty_npushed;
 878     }
 879     if (kdebugflag & 4) {
 880         i = PPPDBG_LOG + PPPDBG_AHDLC;
 881         strioctl(pppfd, PPPIO_DEBUG, &i, sizeof(int), 0);
 882     }
 883     /*
 884      * There's no need to push comp module if we don't intend
 885      * to compress anything
 886      */
 887     if (any_compressions()) {
 888         if (ioctl(fd, I_PUSH, COMP_MOD_NAME) < 0)
 889             error("Couldn't push PPP compression module: %m");
 890         else
 891             ++tty_npushed;
 892     }
 893
 894     if (kdebugflag & 2) {
 895         i = PPPDBG_LOG;
 896         if (any_compressions())
 897             i += PPPDBG_COMP;
 898         strioctl(pppfd, PPPIO_DEBUG, &i, sizeof(int), 0);
 899     }
 900
 901     /* Link the serial port under the PPP multiplexor. */
 902     if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0) {
 903         error("Can't link tty to PPP mux: %m");
 904         return -1;
 905     }
 906
 907     return pppfd;
 908 }
 909
 910 /*
 911  * tty_disestablish_ppp - Restore the serial port to normal operation.
 912  * It attempts to reconstruct the stream with the previously popped
 913  * modules.  This shouldn't call die() because it's called from die().
 914  */
 915 void
 916 tty_disestablish_ppp(fd)
 917     int fd;
 918 {
 919     int i;
 920
 921     if (fdmuxid >= 0) {
 922         if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
 923             if (!hungup)
 924                 error("Can't unlink tty from PPP mux: %m");
 925         }
 926         fdmuxid = -1;
 927
 928         if (!hungup) {
 929             while (tty_npushed > 0 && ioctl(fd, I_POP, 0) >= 0)
 930                 --tty_npushed;
 931             for (i = tty_nmodules - 1; i >= 0; --i)
 932                 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
 933                     error("Couldn't restore tty module %s: %m",
 934                            tty_modules[i]);
 935         }
 936         if (hungup && default_device && tty_sid > 0) {
 937             /*
 938              * If we have received a hangup, we need to send a SIGHUP
 939              * to the terminal's controlling process.  The reason is
 940              * that the original stream head for the terminal hasn't
 941              * seen the M_HANGUP message (it went up through the ppp
 942              * driver to the stream head for our fd to /dev/ppp).
 943              */
 944             kill(tty_sid, SIGHUP);
 945         }
 946     }
 947 }
 948
 949 /*
 950  * Check whether the link seems not to be 8-bit clean.
 951  */
 952 void
 953 clean_check()
 954 {
 955     int x;
 956     char *s;
 957
 958     if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
 959         return;
 960     s = NULL;
 961     switch (~x) {
 962     case RCV_B7_0:
 963         s = "bit 7 set to 1";
 964         break;
 965     case RCV_B7_1:
 966         s = "bit 7 set to 0";
 967         break;
 968     case RCV_EVNP:
 969         s = "odd parity";
 970         break;
 971     case RCV_ODDP:
 972         s = "even parity";
 973         break;
 974     }
 975     if (s != NULL) {
 976         warn("Serial link is not 8-bit clean:");
 977         warn("All received characters had %s", s);
 978     }
 979 }
 980
 981 /*
 982  * List of valid speeds.
 983  */
 984 struct speed {
 985     int speed_int, speed_val;
 986 } speeds[] = {
 987 #ifdef B50
 988     { 50, B50 },
 989 #endif
 990 #ifdef B75
 991     { 75, B75 },
 992 #endif
 993 #ifdef B110
 994     { 110, B110 },
 995 #endif
 996 #ifdef B134
 997     { 134, B134 },
 998 #endif
 999 #ifdef B150
1000     { 150, B150 },
1001 #endif
1002 #ifdef B200
1003     { 200, B200 },
1004 #endif
1005 #ifdef B300
1006     { 300, B300 },
1007 #endif
1008 #ifdef B600
1009     { 600, B600 },
1010 #endif
1011 #ifdef B1200
1012     { 1200, B1200 },
1013 #endif
1014 #ifdef B1800
1015     { 1800, B1800 },
1016 #endif
1017 #ifdef B2000
1018     { 2000, B2000 },
1019 #endif
1020 #ifdef B2400
1021     { 2400, B2400 },
1022 #endif
1023 #ifdef B3600
1024     { 3600, B3600 },
1025 #endif
1026 #ifdef B4800
1027     { 4800, B4800 },
1028 #endif
1029 #ifdef B7200
1030     { 7200, B7200 },
1031 #endif
1032 #ifdef B9600
1033     { 9600, B9600 },
1034 #endif
1035 #ifdef B19200
1036     { 19200, B19200 },
1037 #endif
1038 #ifdef B38400
1039     { 38400, B38400 },
1040 #endif
1041 #ifdef EXTA
1042     { 19200, EXTA },
1043 #endif
1044 #ifdef EXTB
1045     { 38400, EXTB },
1046 #endif
1047 #ifdef B57600
1048     { 57600, B57600 },
1049 #endif
1050 #ifdef B76800
1051     { 76800, B76800 },
1052 #endif
1053 #ifdef B115200
1054     { 115200, B115200 },
1055 #endif
1056 #ifdef B153600
1057     { 153600, B153600 },
1058 #endif
1059 #ifdef B230400
1060     { 230400, B230400 },
1061 #endif
1062 #ifdef B307200
1063     { 307200, B307200 },
1064 #endif
1065 #ifdef B460800
1066     { 460800, B460800 },
1067 #endif
1068     { 0, 0 }
1069 };
1070
1071 /*
1072  * Translate from bits/second to a speed_t.
1073  */
1074 static int
1075 translate_speed(bps)
1076     int bps;
1077 {
1078     struct speed *speedp;
1079
1080     if (bps == 0)
1081         return 0;
1082     for (speedp = speeds; speedp->speed_int; speedp++)
1083         if (bps == speedp->speed_int)
1084             return speedp->speed_val;
1085     warn("speed %d not supported", bps);
1086     return 0;
1087 }
1088
1089 /*
1090  * Translate from a speed_t to bits/second.
1091  */
1092 static int
1093 baud_rate_of(speed)
1094     int speed;
1095 {
1096     struct speed *speedp;
1097
1098     if (speed == 0)
1099         return 0;
1100     for (speedp = speeds; speedp->speed_int; speedp++)
1101         if (speed == speedp->speed_val)
1102             return speedp->speed_int;
1103     return 0;
1104 }
1105
1106 /*
1107  * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
1108  * at the requested speed, etc.  If `local' is true, set CLOCAL
1109  * regardless of whether the modem option was specified.
1110  */
1111 void
1112 set_up_tty(fd, local)
1113     int fd, local;
1114 {
1115     int speed;
1116     struct termios tios;
1117 #if !defined(CRTSCTS)
1118     struct termiox tiox;
1119 #endif
1120
1121     if (!sync_serial && tcgetattr(fd, &tios) < 0)
1122         fatal("tcgetattr: %m");
1123
1124 #ifndef CRTSCTS
1125     termiox_ok = 1;
1126     if (!sync_serial && ioctl (fd, TCGETX, &tiox) < 0) {
1127         termiox_ok = 0;
1128         if (errno != ENOTTY)
1129             error("TCGETX: %m");
1130     }
1131 #endif
1132
1133     if (!restore_term) {
1134         inittermios = tios;
1135 #ifndef CRTSCTS
1136         inittermiox = tiox;
1137 #endif
1138         if (!sync_serial)
1139             ioctl(fd, TIOCGWINSZ, &wsinfo);
1140     }
1141
1142     tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
1143 #ifdef CRTSCTS
1144     if (crtscts > 0)
1145         tios.c_cflag |= CRTSCTS;
1146     else if (crtscts < 0)
1147         tios.c_cflag &= ~CRTSCTS;
1148 #else
1149     if (crtscts != 0 && !termiox_ok) {
1150         error("Can't set RTS/CTS flow control");
1151     } else if (crtscts > 0) {
1152         tiox.x_hflag |= RTSXOFF|CTSXON;
1153     } else if (crtscts < 0) {
1154         tiox.x_hflag &= ~(RTSXOFF|CTSXON);
1155     }
1156 #endif
1157
1158     tios.c_cflag |= CS8 | CREAD | HUPCL;
1159     if (local || !modem)
1160         tios.c_cflag |= CLOCAL;
1161     tios.c_iflag = IGNBRK | IGNPAR;
1162     tios.c_oflag = 0;
1163     tios.c_lflag = 0;
1164     tios.c_cc[VMIN] = 1;
1165     tios.c_cc[VTIME] = 0;
1166
1167     if (crtscts == -2) {
1168         tios.c_iflag |= IXON | IXOFF;
1169         tios.c_cc[VSTOP] = 0x13;        /* DC3 = XOFF = ^S */
1170         tios.c_cc[VSTART] = 0x11;       /* DC1 = XON  = ^Q */
1171     }
1172
1173     speed = translate_speed(inspeed);
1174     if (speed) {
1175         cfsetospeed(&tios, speed);
1176         cfsetispeed(&tios, speed);
1177     } else {
1178         speed = cfgetospeed(&tios);
1179         /*
1180          * We can't proceed if the serial port speed is 0,
1181          * since that implies that the serial port is disabled.
1182          */
1183         if ((speed == B0) && !sync_serial)
1184             fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
1185     }
1186
1187     if (!sync_serial && tcsetattr(fd, TCSAFLUSH, &tios) < 0)
1188         fatal("tcsetattr: %m");
1189
1190 #ifndef CRTSCTS
1191     if (!sync_serial && termiox_ok && ioctl (fd, TCSETXF, &tiox) < 0){
1192         error("TCSETXF: %m");
1193     }
1194 #endif
1195
1196     baud_rate = inspeed = baud_rate_of(speed);
1197     if (!sync_serial)
1198         restore_term = 1;
1199 }
1200
1201 /*
1202  * restore_tty - restore the terminal to the saved settings.
1203  */
1204 void
1205 restore_tty(fd)
1206     int fd;
1207 {
1208     if (restore_term) {
1209         if (!default_device) {
1210             /*
1211              * Turn off echoing, because otherwise we can get into
1212              * a loop with the tty and the modem echoing to each other.
1213              * We presume we are the sole user of this tty device, so
1214              * when we close it, it will revert to its defaults anyway.
1215              */
1216             inittermios.c_lflag &= ~(ECHO | ECHONL);
1217         }
1218         if (!sync_serial && tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
1219             if (!hungup && errno != ENXIO)
1220                 warn("tcsetattr: %m");
1221 #ifndef CRTSCTS
1222         if (!sync_serial && ioctl (fd, TCSETXF, &inittermiox) < 0){
1223             if (!hungup && errno != ENXIO)
1224                 error("TCSETXF: %m");
1225         }
1226 #endif
1227         if (!sync_serial)
1228             ioctl(fd, TIOCSWINSZ, &wsinfo);
1229         restore_term = 0;
1230     }
1231 }
1232
1233 /*
1234  * setdtr - control the DTR line on the serial port.
1235  * This is called from die(), so it shouldn't call die().
1236  */
1237 void
1238 setdtr(fd, on)
1239 int fd, on;
1240 {
1241     int modembits = TIOCM_DTR;
1242
1243     ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
1244 }
1245
1246 /*
1247  * open_loopback - open the device we use for getting packets
1248  * in demand mode.  Under Solaris 2, we use our existing fd
1249  * to the ppp driver.
1250  */
1251 int
1252 open_ppp_loopback()
1253 {
1254     return pppfd;
1255 }
1256
1257 /*
1258  * output - Output PPP packet.
1259  */
1260 void
1261 output(unit, p, len)
1262     int unit;
1263     u_char *p;
1264     int len;
1265 {
1266     struct strbuf data;
1267     int retries;
1268     struct pollfd pfd;
1269
1270     if (debug)
1271         dbglog("sent %P", p, len);
1272
1273     data.len = len;
1274     data.buf = (caddr_t) p;
1275     retries = 4;
1276     while (putmsg(pppfd, NULL, &data, 0) < 0) {
1277         if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
1278             if (errno != ENXIO)
1279                 error("Couldn't send packet: %m");
1280             break;
1281         }
1282         pfd.fd = pppfd;
1283         pfd.events = POLLOUT;
1284         poll(&pfd, 1, 250);     /* wait for up to 0.25 seconds */
1285     }
1286 }
1287
1288
1289 /*
1290  * wait_input - wait until there is data available,
1291  * for the length of time specified by *timo (indefinite
1292  * if timo is NULL).
1293  */
1294 void
1295 wait_input(timo)
1296     struct timeval *timo;
1297 {
1298     int t;
1299
1300     t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
1301     if (poll(pollfds, n_pollfds, t) < 0 && errno != EINTR)
1302         fatal("poll: %m");
1303 }
1304
1305 /*
1306  * add_fd - add an fd to the set that wait_input waits for.
1307  */
1308 void add_fd(fd)
1309     int fd;
1310 {
1311     int n;
1312
1313     for (n = 0; n < n_pollfds; ++n)
1314         if (pollfds[n].fd == fd)
1315             return;
1316     if (n_pollfds < MAX_POLLFDS) {
1317         pollfds[n_pollfds].fd = fd;
1318         pollfds[n_pollfds].events = POLLIN | POLLPRI | POLLHUP;
1319         ++n_pollfds;
1320     } else
1321         error("Too many inputs!");
1322 }
1323
1324 /*
1325  * remove_fd - remove an fd from the set that wait_input waits for.
1326  */
1327 void remove_fd(fd)
1328     int fd;
1329 {
1330     int n;
1331
1332     for (n = 0; n < n_pollfds; ++n) {
1333         if (pollfds[n].fd == fd) {
1334             while (++n < n_pollfds)
1335                 pollfds[n-1] = pollfds[n];
1336             --n_pollfds;
1337             break;
1338         }
1339     }
1340 }
1341
1342
1343
1344 /*
1345  * read_packet - get a PPP packet from the serial device.
1346  */
1347 int
1348 read_packet(buf)
1349     u_char *buf;
1350 {
1351     struct strbuf ctrl, data;
1352     int flags, len;
1353     unsigned char ctrlbuf[sizeof(union DL_primitives) + 64];
1354
1355     for (;;) {
1356         data.maxlen = PPP_MRU + PPP_HDRLEN;
1357         data.buf = (caddr_t) buf;
1358         ctrl.maxlen = sizeof(ctrlbuf);
1359         ctrl.buf = (caddr_t) ctrlbuf;
1360         flags = 0;
1361         len = getmsg(pppfd, &ctrl, &data, &flags);
1362         if (len < 0) {
1363             if (errno == EAGAIN || errno == EINTR)
1364                 return -1;
1365             fatal("Error reading packet: %m");
1366         }
1367
1368         if (ctrl.len <= 0)
1369             return data.len;
1370
1371         /*
1372          * Got a M_PROTO or M_PCPROTO message.  Interpret it
1373          * as a DLPI primitive??
1374          */
1375         if (debug)
1376             dbglog("got dlpi prim 0x%x, len=%d",
1377                    ((union DL_primitives *)ctrlbuf)->dl_primitive, ctrl.len);
1378
1379     }
1380 }
1381
1382 /*
1383  * get_loop_output - get outgoing packets from the ppp device,
1384  * and detect when we want to bring the real link up.
1385  * Return value is 1 if we need to bring up the link, 0 otherwise.
1386  */
1387 int
1388 get_loop_output()
1389 {
1390     int len;
1391     int rv = 0;
1392
1393     while ((len = read_packet(inpacket_buf)) > 0) {
1394         if (loop_frame(inpacket_buf, len))
1395             rv = 1;
1396     }
1397     return rv;
1398 }
1399
1400 /*
1401  * netif_set_mtu - set the MTU on the PPP network interface.
1402  */
1403 void
1404 netif_set_mtu(unit, mtu)
1405     int unit, mtu;
1406 {
1407     struct ifreq ifr;
1408 #if defined(INET6) && defined(SOL2)
1409     struct lifreq lifr;
1410     int fd;
1411 #endif /* defined(INET6) && defined(SOL2) */
1412
1413     memset(&ifr, 0, sizeof(ifr));
1414     strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1415     ifr.ifr_metric = link_mtu;
1416     if (ioctl(ipfd, SIOCSIFMTU, &ifr) < 0) {
1417         error("Couldn't set IP MTU (%s): %m", ifr.ifr_name);
1418     }
1419
1420 #if defined(INET6) && defined(SOL2)
1421     fd = socket(AF_INET6, SOCK_DGRAM, 0);
1422     if (fd < 0)
1423         error("Couldn't open IPv6 socket: %m");
1424
1425     memset(&lifr, 0, sizeof(lifr));
1426     strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1427     lifr.lifr_mtu = link_mtu;
1428     if (ioctl(fd, SIOCSLIFMTU, &lifr) < 0) {
1429         close(fd);
1430         error("Couldn't set IPv6 MTU (%s): %m", ifr.ifr_name);
1431     }
1432     close(fd);
1433 #endif /* defined(INET6) && defined(SOL2) */
1434 }
1435
1436 /*
1437  * tty_send_config - configure the transmit characteristics of
1438  * the ppp interface.
1439  */
1440 void
1441 tty_send_config(mtu, asyncmap, pcomp, accomp)
1442     int mtu;
1443     u_int32_t asyncmap;
1444     int pcomp, accomp;
1445 {
1446     int cf[2];
1447
1448     link_mtu = mtu;
1449     if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
1450         if (hungup && errno == ENXIO)
1451             return;
1452         error("Couldn't set MTU: %m");
1453     }
1454     if (fdmuxid >= 0) {
1455         if (!sync_serial) {
1456             if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
1457                 error("Couldn't set transmit ACCM: %m");
1458             }
1459         }
1460         cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
1461         cf[1] = COMP_PROT | COMP_AC;
1462         if (any_compressions() &&
1463             strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1464             error("Couldn't set prot/AC compression: %m");
1465         }
1466     }
1467 }
1468
1469 /*
1470  * ppp_set_xaccm - set the extended transmit ACCM for the interface.
1471  */
1472 void
1473 tty_set_xaccm(accm)
1474     ext_accm accm;
1475 {
1476     if (sync_serial)
1477         return;
1478
1479     if (fdmuxid >= 0
1480         && strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
1481         if (!hungup || errno != ENXIO)
1482             warn("Couldn't set extended ACCM: %m");
1483     }
1484 }
1485
1486 /*
1487  * ppp_recv_config - configure the receive-side characteristics of
1488  * the ppp interface.
1489  */
1490 void
1491 tty_recv_config(mru, asyncmap, pcomp, accomp)
1492     int mru;
1493     u_int32_t asyncmap;
1494     int pcomp, accomp;
1495 {
1496     int cf[2];
1497
1498     link_mru = mru;
1499     if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
1500         if (hungup && errno == ENXIO)
1501             return;
1502         error("Couldn't set MRU: %m");
1503     }
1504     if (fdmuxid >= 0) {
1505         if (!sync_serial) {
1506             if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
1507                 error("Couldn't set receive ACCM: %m");
1508             }
1509         }
1510         cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
1511         cf[1] = DECOMP_PROT | DECOMP_AC;
1512         if (any_compressions() &&
1513             strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1514             error("Couldn't set prot/AC decompression: %m");
1515         }
1516     }
1517 }
1518
1519 /*
1520  * ccp_test - ask kernel whether a given compression method
1521  * is acceptable for use.
1522  */
1523 int
1524 ccp_test(unit, opt_ptr, opt_len, for_transmit)
1525     int unit, opt_len, for_transmit;
1526     u_char *opt_ptr;
1527 {
1528     if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
1529                  opt_ptr, opt_len, 0) >= 0)
1530         return 1;
1531     return (errno == ENOSR)? 0: -1;
1532 }
1533
1534 /*
1535  * ccp_flags_set - inform kernel about the current state of CCP.
1536  */
1537 void
1538 ccp_flags_set(unit, isopen, isup)
1539     int unit, isopen, isup;
1540 {
1541     int cf[2];
1542
1543     cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
1544     cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
1545     if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1546         if (!hungup || errno != ENXIO)
1547             error("Couldn't set kernel CCP state: %m");
1548     }
1549 }
1550
1551 /*
1552  * get_idle_time - return how long the link has been idle.
1553  */
1554 int
1555 get_idle_time(u, ip)
1556     int u;
1557     struct ppp_idle *ip;
1558 {
1559     return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
1560 }
1561
1562 /*
1563  * get_ppp_stats - return statistics for the link.
1564  */
1565 int
1566 get_ppp_stats(u, stats)
1567     int u;
1568     struct pppd_stats *stats;
1569 {
1570     struct ppp_stats s;
1571
1572     if (!sync_serial &&
1573         strioctl(pppfd, PPPIO_GETSTAT, &s, 0, sizeof(s)) < 0) {
1574         error("Couldn't get link statistics: %m");
1575         return 0;
1576     }
1577     stats->bytes_in = s.p.ppp_ibytes;
1578     stats->bytes_out = s.p.ppp_obytes;
1579     return 1;
1580 }
1581
1582
1583 /*
1584  * ccp_fatal_error - returns 1 if decompression was disabled as a
1585  * result of an error detected after decompression of a packet,
1586  * 0 otherwise.  This is necessary because of patent nonsense.
1587  */
1588 int
1589 ccp_fatal_error(unit)
1590     int unit;
1591 {
1592     int cf[2];
1593
1594     cf[0] = cf[1] = 0;
1595     if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1596         if (errno != ENXIO && errno != EINVAL)
1597             error("Couldn't get compression flags: %m");
1598         return 0;
1599     }
1600     return cf[0] & CCP_FATALERROR;
1601 }
1602
1603 /*
1604  * sifvjcomp - config tcp header compression
1605  */
1606 int
1607 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
1608     int u, vjcomp, xcidcomp, xmaxcid;
1609 {
1610     int cf[2];
1611     char maxcid[2];
1612
1613     if (vjcomp) {
1614         maxcid[0] = xcidcomp;
1615         maxcid[1] = 15;
1616         if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
1617             error("Couldn't initialize VJ compression: %m");
1618         }
1619     }
1620
1621     cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0)
1622         + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
1623     cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
1624     if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1625         if (vjcomp)
1626             error("Couldn't enable VJ compression: %m");
1627     }
1628
1629     return 1;
1630 }
1631
1632 /*
1633  * sifup - Config the interface up and enable IP packets to pass.
1634  */
1635 int
1636 sifup(u)
1637     int u;
1638 {
1639     struct ifreq ifr;
1640
1641     strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1642     if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {
1643         error("Couldn't mark interface up (get): %m");
1644         return 0;
1645     }
1646     ifr.ifr_flags |= IFF_UP;
1647     if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1648         error("Couldn't mark interface up (set): %m");
1649         return 0;
1650     }
1651     if_is_up = 1;
1652     return 1;
1653 }
1654
1655 /*
1656  * sifdown - Config the interface down and disable IP.
1657  */
1658 int
1659 sifdown(u)
1660     int u;
1661 {
1662     struct ifreq ifr;
1663
1664     if (ipmuxid < 0)
1665         return 1;
1666     strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1667     if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {
1668         error("Couldn't mark interface down (get): %m");
1669         return 0;
1670     }
1671     ifr.ifr_flags &= ~IFF_UP;
1672     if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1673         error("Couldn't mark interface down (set): %m");
1674         return 0;
1675     }
1676     if_is_up = 0;
1677     return 1;
1678 }
1679
1680 /*
1681  * sifnpmode - Set the mode for handling packets for a given NP.
1682  */
1683 int
1684 sifnpmode(u, proto, mode)
1685     int u;
1686     int proto;
1687     enum NPmode mode;
1688 {
1689     int npi[2];
1690
1691     npi[0] = proto;
1692     npi[1] = (int) mode;
1693     if (strioctl(pppfd, PPPIO_NPMODE, &npi, 2 * sizeof(int), 0) < 0) {
1694         error("ioctl(set NP %d mode to %d): %m", proto, mode);
1695         return 0;
1696     }
1697     return 1;
1698 }
1699
1700 #if defined(SOL2) && defined(INET6)
1701 /*
1702  * sif6up - Config the IPv6 interface up and enable IPv6 packets to pass.
1703  */
1704 int
1705 sif6up(u)
1706     int u;
1707 {
1708     struct lifreq lifr;
1709     int fd;
1710
1711     fd = socket(AF_INET6, SOCK_DGRAM, 0);
1712     if (fd < 0) {
1713         return 0;
1714     }
1715
1716     memset(&lifr, 0, sizeof(lifr));
1717     strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1718     if (ioctl(fd, SIOCGLIFFLAGS, &lifr) < 0) {
1719         close(fd);
1720         return 0;
1721     }
1722
1723     lifr.lifr_flags |= IFF_UP;
1724     strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1725     if (ioctl(fd, SIOCSLIFFLAGS, &lifr) < 0) {
1726         close(fd);
1727         return 0;
1728     }
1729
1730     if6_is_up = 1;
1731     close(fd);
1732     return 1;
1733 }
1734
1735 /*
1736  * sifdown - Config the IPv6 interface down and disable IPv6.
1737  */
1738 int
1739 sif6down(u)
1740     int u;
1741 {
1742     struct lifreq lifr;
1743     int fd;
1744
1745     fd = socket(AF_INET6, SOCK_DGRAM, 0);
1746     if (fd < 0)
1747         return 0;
1748
1749     memset(&lifr, 0, sizeof(lifr));
1750     strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1751     if (ioctl(fd, SIOCGLIFFLAGS, &lifr) < 0) {
1752         close(fd);
1753         return 0;
1754     }
1755
1756     lifr.lifr_flags &= ~IFF_UP;
1757     strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1758     if (ioctl(fd, SIOCGLIFFLAGS, &lifr) < 0) {
1759         close(fd);
1760         return 0;
1761     }
1762
1763     if6_is_up = 0;
1764     close(fd);
1765     return 1;
1766 }
1767
1768 /*
1769  * sif6addr - Config the interface with an IPv6 link-local address
1770  */
1771 int
1772 sif6addr(u, o, h)
1773     int u;
1774     eui64_t o, h;
1775 {
1776     struct lifreq lifr;
1777     struct sockaddr_storage laddr;
1778     struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&laddr;
1779     int fd;
1780
1781     fd = socket(AF_INET6, SOCK_DGRAM, 0);
1782     if (fd < 0)
1783         return 0;
1784
1785     memset(&lifr, 0, sizeof(lifr));
1786     strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1787
1788     /*
1789      * Do this because /dev/ppp responds to DL_PHYS_ADDR_REQ with
1790      * zero values, hence the interface token came to be zero too,
1791      * and without this, in.ndpd will complain
1792      */
1793     IN6_LLTOKEN_FROM_EUI64(lifr, sin6, o);
1794     if (ioctl(fd, SIOCSLIFTOKEN, &lifr) < 0) {
1795         close(fd);
1796         return 0;
1797     }
1798
1799     /*
1800      * Set the interface address and destination address
1801      */
1802     IN6_LLADDR_FROM_EUI64(lifr, sin6, o);
1803     if (ioctl(fd, SIOCSLIFADDR, &lifr) < 0) {
1804         close(fd);
1805         return 0;
1806     }
1807
1808     memset(&lifr, 0, sizeof(lifr));
1809     strlcpy(lifr.lifr_name, ifname, sizeof(lifr.lifr_name));
1810     IN6_LLADDR_FROM_EUI64(lifr, sin6, h);
1811     if (ioctl(fd, SIOCSLIFDSTADDR, &lifr) < 0) {
1812         close(fd);
1813         return 0;
1814     }
1815
1816     return 1;
1817 }
1818
1819 /*
1820  * cif6addr - Remove the IPv6 address from interface
1821  */
1822 int
1823 cif6addr(u, o, h)
1824     int u;
1825     eui64_t o, h;
1826 {
1827     return 1;
1828 }
1829
1830 #endif /* defined(SOL2) && defined(INET6) */
1831
1832
1833 #define INET_ADDR(x)    (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1834
1835 /*
1836  * sifaddr - Config the interface IP addresses and netmask.
1837  */
1838 int
1839 sifaddr(u, o, h, m)
1840     int u;
1841     u_int32_t o, h, m;
1842 {
1843     struct ifreq ifr;
1844     int ret = 1;
1845
1846     memset(&ifr, 0, sizeof(ifr));
1847     strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1848     ifr.ifr_addr.sa_family = AF_INET;
1849     INET_ADDR(ifr.ifr_addr) = m;
1850     if (ioctl(ipfd, SIOCSIFNETMASK, &ifr) < 0) {
1851         error("Couldn't set IP netmask: %m");
1852         ret = 0;
1853     }
1854     ifr.ifr_addr.sa_family = AF_INET;
1855     INET_ADDR(ifr.ifr_addr) = o;
1856     if (ioctl(ipfd, SIOCSIFADDR, &ifr) < 0) {
1857         error("Couldn't set local IP address: %m");
1858         ret = 0;
1859     }
1860
1861     /*
1862      * On some systems, we have to explicitly set the point-to-point
1863      * flag bit before we can set a destination address.
1864      */
1865     if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) >= 0
1866         && (ifr.ifr_flags & IFF_POINTOPOINT) == 0) {
1867         ifr.ifr_flags |= IFF_POINTOPOINT;
1868         if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1869             error("Couldn't mark interface pt-to-pt: %m");
1870             ret = 0;
1871         }
1872     }
1873     ifr.ifr_dstaddr.sa_family = AF_INET;
1874     INET_ADDR(ifr.ifr_dstaddr) = h;
1875     if (ioctl(ipfd, SIOCSIFDSTADDR, &ifr) < 0) {
1876         error("Couldn't set remote IP address: %m");
1877         ret = 0;
1878     }
1879
1880     remote_addr = h;
1881     return ret;
1882 }
1883
1884 /*
1885  * cifaddr - Clear the interface IP addresses, and delete routes
1886  * through the interface if possible.
1887  */
1888 int
1889 cifaddr(u, o, h)
1890     int u;
1891     u_int32_t o, h;
1892 {
1893 #if defined(__USLC__)               /* was: #if 0 */
1894     cifroute(unit, ouraddr, hisaddr);
1895     if (ipmuxid >= 0) {
1896         notice("Removing ppp interface unit");
1897         if (ioctl(ipfd, I_UNLINK, ipmuxid) < 0) {
1898             error("Can't remove ppp interface unit: %m");
1899             return 0;
1900         }
1901         ipmuxid = -1;
1902     }
1903 #endif
1904     remote_addr = 0;
1905     return 1;
1906 }
1907
1908 /*
1909  * sifdefaultroute - assign a default route through the address given.
1910  */
1911 int
1912 sifdefaultroute(u, l, g)
1913     int u;
1914     u_int32_t l, g;
1915 {
1916     struct rtentry rt;
1917
1918 #if defined(__USLC__)
1919     g = l;                      /* use the local address as gateway */
1920 #endif
1921     memset(&rt, 0, sizeof(rt));
1922     rt.rt_dst.sa_family = AF_INET;
1923     INET_ADDR(rt.rt_dst) = 0;
1924     rt.rt_gateway.sa_family = AF_INET;
1925     INET_ADDR(rt.rt_gateway) = g;
1926     rt.rt_flags = RTF_GATEWAY;
1927
1928     if (ioctl(ipfd, SIOCADDRT, &rt) < 0) {
1929         error("Can't add default route: %m");
1930         return 0;
1931     }
1932
1933     default_route_gateway = g;
1934     return 1;
1935 }
1936
1937 /*
1938  * cifdefaultroute - delete a default route through the address given.
1939  */
1940 int
1941 cifdefaultroute(u, l, g)
1942     int u;
1943     u_int32_t l, g;
1944 {
1945     struct rtentry rt;
1946
1947 #if defined(__USLC__)
1948     g = l;                      /* use the local address as gateway */
1949 #endif
1950     memset(&rt, 0, sizeof(rt));
1951     rt.rt_dst.sa_family = AF_INET;
1952     INET_ADDR(rt.rt_dst) = 0;
1953     rt.rt_gateway.sa_family = AF_INET;
1954     INET_ADDR(rt.rt_gateway) = g;
1955     rt.rt_flags = RTF_GATEWAY;
1956
1957     if (ioctl(ipfd, SIOCDELRT, &rt) < 0) {
1958         error("Can't delete default route: %m");
1959         return 0;
1960     }
1961
1962     default_route_gateway = 0;
1963     return 1;
1964 }
1965
1966 /*
1967  * sifproxyarp - Make a proxy ARP entry for the peer.
1968  */
1969 int
1970 sifproxyarp(unit, hisaddr)
1971     int unit;
1972     u_int32_t hisaddr;
1973 {
1974     struct arpreq arpreq;
1975
1976     memset(&arpreq, 0, sizeof(arpreq));
1977     if (!get_ether_addr(hisaddr, &arpreq.arp_ha))
1978         return 0;
1979
1980     arpreq.arp_pa.sa_family = AF_INET;
1981     INET_ADDR(arpreq.arp_pa) = hisaddr;
1982     arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1983     if (ioctl(ipfd, SIOCSARP, (caddr_t) &arpreq) < 0) {
1984         error("Couldn't set proxy ARP entry: %m");
1985         return 0;
1986     }
1987
1988     proxy_arp_addr = hisaddr;
1989     return 1;
1990 }
1991
1992 /*
1993  * cifproxyarp - Delete the proxy ARP entry for the peer.
1994  */
1995 int
1996 cifproxyarp(unit, hisaddr)
1997     int unit;
1998     u_int32_t hisaddr;
1999 {
2000     struct arpreq arpreq;
2001
2002     memset(&arpreq, 0, sizeof(arpreq));
2003     arpreq.arp_pa.sa_family = AF_INET;
2004     INET_ADDR(arpreq.arp_pa) = hisaddr;
2005     if (ioctl(ipfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
2006         error("Couldn't delete proxy ARP entry: %m");
2007         return 0;
2008     }
2009
2010     proxy_arp_addr = 0;
2011     return 1;
2012 }
2013
2014 /*
2015  * get_ether_addr - get the hardware address of an interface on the
2016  * the same subnet as ipaddr.
2017  */
2018 #define MAX_IFS         32
2019
2020 static int
2021 get_ether_addr(ipaddr, hwaddr)
2022     u_int32_t ipaddr;
2023     struct sockaddr *hwaddr;
2024 {
2025     struct ifreq *ifr, *ifend, ifreq;
2026     int nif;
2027     struct ifconf ifc;
2028     u_int32_t ina, mask;
2029
2030     /*
2031      * Scan through the system's network interfaces.
2032      */
2033 #ifdef SIOCGIFNUM
2034     if (ioctl(ipfd, SIOCGIFNUM, &nif) < 0)
2035 #endif
2036         nif = MAX_IFS;
2037     ifc.ifc_len = nif * sizeof(struct ifreq);
2038     ifc.ifc_buf = (caddr_t) malloc(ifc.ifc_len);
2039     if (ifc.ifc_buf == 0)
2040         return 0;
2041     if (ioctl(ipfd, SIOCGIFCONF, &ifc) < 0) {
2042         warn("Couldn't get system interface list: %m");
2043         free(ifc.ifc_buf);
2044         return 0;
2045     }
2046     ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
2047     for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
2048         if (ifr->ifr_addr.sa_family != AF_INET)
2049             continue;
2050         /*
2051          * Check that the interface is up, and not point-to-point or loopback.
2052          */
2053         strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
2054         if (ioctl(ipfd, SIOCGIFFLAGS, &ifreq) < 0)
2055             continue;
2056         if ((ifreq.ifr_flags &
2057              (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
2058             != (IFF_UP|IFF_BROADCAST))
2059             continue;
2060         /*
2061          * Get its netmask and check that it's on the right subnet.
2062          */
2063         if (ioctl(ipfd, SIOCGIFNETMASK, &ifreq) < 0)
2064             continue;
2065         ina = INET_ADDR(ifr->ifr_addr);
2066         mask = INET_ADDR(ifreq.ifr_addr);
2067         if ((ipaddr & mask) == (ina & mask))
2068             break;
2069     }
2070
2071     if (ifr >= ifend) {
2072         warn("No suitable interface found for proxy ARP");
2073         free(ifc.ifc_buf);
2074         return 0;
2075     }
2076
2077     info("found interface %s for proxy ARP", ifr->ifr_name);
2078     if (!get_hw_addr(ifr->ifr_name, ina, hwaddr)) {
2079         error("Couldn't get hardware address for %s", ifr->ifr_name);
2080         free(ifc.ifc_buf);
2081         return 0;
2082     }
2083
2084     free(ifc.ifc_buf);
2085     return 1;
2086 }
2087
2088 /*
2089  * get_hw_addr_dlpi - obtain the hardware address using DLPI
2090  */
2091 static int
2092 get_hw_addr_dlpi(name, hwaddr)
2093     char *name;
2094     struct sockaddr *hwaddr;
2095 {
2096     char *p, *q;
2097     int unit, iffd, adrlen;
2098     unsigned char *adrp;
2099     char ifdev[24];
2100     struct {
2101         union DL_primitives prim;
2102         char space[64];
2103     } reply;
2104
2105     /*
2106      * We have to open the device and ask it for its hardware address.
2107      * First split apart the device name and unit.
2108      */
2109     slprintf(ifdev, sizeof(ifdev), "/dev/%s", name);
2110     for (q = ifdev + strlen(ifdev); --q >= ifdev; )
2111         if (!isdigit(*q))
2112             break;
2113     unit = atoi(q+1);
2114     q[1] = 0;
2115
2116     /*
2117      * Open the device and do a DLPI attach and phys_addr_req.
2118      */
2119     iffd = open(ifdev, O_RDWR);
2120     if (iffd < 0) {
2121         error("Can't open %s: %m", ifdev);
2122         return 0;
2123     }
2124     if (dlpi_attach(iffd, unit) < 0
2125         || dlpi_get_reply(iffd, &reply.prim, DL_OK_ACK, sizeof(reply)) < 0
2126         || dlpi_info_req(iffd) < 0
2127         || dlpi_get_reply(iffd, &reply.prim, DL_INFO_ACK, sizeof(reply)) < 0) {
2128         close(iffd);
2129         return 0;
2130     }
2131
2132     adrlen = reply.prim.info_ack.dl_addr_length;
2133     adrp = (unsigned char *)&reply + reply.prim.info_ack.dl_addr_offset;
2134
2135 #if DL_CURRENT_VERSION >= 2
2136     if (reply.prim.info_ack.dl_sap_length < 0)
2137         adrlen += reply.prim.info_ack.dl_sap_length;
2138     else
2139         adrp += reply.prim.info_ack.dl_sap_length;
2140 #endif
2141
2142     hwaddr->sa_family = AF_UNSPEC;
2143     memcpy(hwaddr->sa_data, adrp, adrlen);
2144
2145     return 1;
2146 }
2147 /*
2148  * get_hw_addr - obtain the hardware address for a named interface.
2149  */
2150 static int
2151 get_hw_addr(name, ina, hwaddr)
2152     char *name;
2153     u_int32_t ina;
2154     struct sockaddr *hwaddr;
2155 {
2156     /* New way - get the address by doing an arp request. */
2157     int s;
2158     struct arpreq req;
2159
2160     s = socket(AF_INET, SOCK_DGRAM, 0);
2161     if (s < 0)
2162         return 0;
2163     memset(&req, 0, sizeof(req));
2164     req.arp_pa.sa_family = AF_INET;
2165     INET_ADDR(req.arp_pa) = ina;
2166     if (ioctl(s, SIOCGARP, &req) < 0) {
2167         error("Couldn't get ARP entry for %s: %m", ip_ntoa(ina));
2168         return 0;
2169     }
2170     *hwaddr = req.arp_ha;
2171     hwaddr->sa_family = AF_UNSPEC;
2172
2173     return 1;
2174 }
2175
2176 static int
2177 dlpi_attach(fd, ppa)
2178     int fd, ppa;
2179 {
2180     dl_attach_req_t req;
2181     struct strbuf buf;
2182
2183     req.dl_primitive = DL_ATTACH_REQ;
2184     req.dl_ppa = ppa;
2185     buf.len = sizeof(req);
2186     buf.buf = (void *) &req;
2187     return putmsg(fd, &buf, NULL, RS_HIPRI);
2188 }
2189
2190 static int
2191 dlpi_info_req(fd)
2192     int fd;
2193 {
2194     dl_info_req_t req;
2195     struct strbuf buf;
2196
2197     req.dl_primitive = DL_INFO_REQ;
2198     buf.len = sizeof(req);
2199     buf.buf = (void *) &req;
2200     return putmsg(fd, &buf, NULL, RS_HIPRI);
2201 }
2202
2203 static int
2204 dlpi_get_reply(fd, reply, expected_prim, maxlen)
2205     union DL_primitives *reply;
2206     int fd, expected_prim, maxlen;
2207 {
2208     struct strbuf buf;
2209     int flags, n;
2210     struct pollfd pfd;
2211
2212     /*
2213      * Use poll to wait for a message with a timeout.
2214      */
2215     pfd.fd = fd;
2216     pfd.events = POLLIN | POLLPRI;
2217     do {
2218         n = poll(&pfd, 1, 1000);
2219     } while (n == -1 && errno == EINTR);
2220     if (n <= 0)
2221         return -1;
2222
2223     /*
2224      * Get the reply.
2225      */
2226     buf.maxlen = maxlen;
2227     buf.buf = (void *) reply;
2228     flags = 0;
2229     if (getmsg(fd, &buf, NULL, &flags) < 0)
2230         return -1;
2231
2232     if (buf.len < sizeof(ulong)) {
2233         if (debug)
2234             dbglog("dlpi response short (len=%d)\n", buf.len);
2235         return -1;
2236     }
2237
2238     if (reply->dl_primitive == expected_prim)
2239         return 0;
2240
2241     if (debug) {
2242         if (reply->dl_primitive == DL_ERROR_ACK) {
2243             dbglog("dlpi error %d (unix errno %d) for prim %x\n",
2244                    reply->error_ack.dl_errno, reply->error_ack.dl_unix_errno,
2245                    reply->error_ack.dl_error_primitive);
2246         } else {
2247             dbglog("dlpi unexpected response prim %x\n",
2248                    reply->dl_primitive);
2249         }
2250     }
2251
2252     return -1;
2253 }
2254
2255 /*
2256  * Return user specified netmask, modified by any mask we might determine
2257  * for address `addr' (in network byte order).
2258  * Here we scan through the system's list of interfaces, looking for
2259  * any non-point-to-point interfaces which might appear to be on the same
2260  * network as `addr'.  If we find any, we OR in their netmask to the
2261  * user-specified netmask.
2262  */
2263 u_int32_t
2264 GetMask(addr)
2265     u_int32_t addr;
2266 {
2267     u_int32_t mask, nmask, ina;
2268     struct ifreq *ifr, *ifend, ifreq;
2269     int nif;
2270     struct ifconf ifc;
2271
2272     addr = ntohl(addr);
2273     if (IN_CLASSA(addr))        /* determine network mask for address class */
2274         nmask = IN_CLASSA_NET;
2275     else if (IN_CLASSB(addr))
2276         nmask = IN_CLASSB_NET;
2277     else
2278         nmask = IN_CLASSC_NET;
2279     /* class D nets are disallowed by bad_ip_adrs */
2280     mask = netmask | htonl(nmask);
2281
2282     /*
2283      * Scan through the system's network interfaces.
2284      */
2285 #ifdef SIOCGIFNUM
2286     if (ioctl(ipfd, SIOCGIFNUM, &nif) < 0)
2287 #endif
2288         nif = MAX_IFS;
2289     ifc.ifc_len = nif * sizeof(struct ifreq);
2290     ifc.ifc_buf = (caddr_t) malloc(ifc.ifc_len);
2291     if (ifc.ifc_buf == 0)
2292         return mask;
2293     if (ioctl(ipfd, SIOCGIFCONF, &ifc) < 0) {
2294         warn("Couldn't get system interface list: %m");
2295         free(ifc.ifc_buf);
2296         return mask;
2297     }
2298     ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
2299     for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
2300         /*
2301          * Check the interface's internet address.
2302          */
2303         if (ifr->ifr_addr.sa_family != AF_INET)
2304             continue;
2305         ina = INET_ADDR(ifr->ifr_addr);
2306         if ((ntohl(ina) & nmask) != (addr & nmask))
2307             continue;
2308         /*
2309          * Check that the interface is up, and not point-to-point or loopback.
2310          */
2311         strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
2312         if (ioctl(ipfd, SIOCGIFFLAGS, &ifreq) < 0)
2313             continue;
2314         if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
2315             != IFF_UP)
2316             continue;
2317         /*
2318          * Get its netmask and OR it into our mask.
2319          */
2320         if (ioctl(ipfd, SIOCGIFNETMASK, &ifreq) < 0)
2321             continue;
2322         mask |= INET_ADDR(ifreq.ifr_addr);
2323     }
2324
2325     free(ifc.ifc_buf);
2326     return mask;
2327 }
2328
2329 /*
2330  * logwtmp - write an accounting record to the /var/adm/wtmp file.
2331  */
2332 void
2333 logwtmp(line, name, host)
2334     const char *line, *name, *host;
2335 {
2336     static struct utmpx utmpx;
2337
2338     if (name[0] != 0) {
2339         /* logging in */
2340         strncpy(utmpx.ut_user, name, sizeof(utmpx.ut_user));
2341         strncpy(utmpx.ut_id, ifname, sizeof(utmpx.ut_id));
2342         strncpy(utmpx.ut_line, line, sizeof(utmpx.ut_line));
2343         utmpx.ut_pid = getpid();
2344         utmpx.ut_type = USER_PROCESS;
2345     } else {
2346         utmpx.ut_type = DEAD_PROCESS;
2347     }
2348     gettimeofday(&utmpx.ut_tv, NULL);
2349     updwtmpx("/var/adm/wtmpx", &utmpx);
2350 }
2351
2352 /*
2353  * get_host_seed - return the serial number of this machine.
2354  */
2355 int
2356 get_host_seed()
2357 {
2358     char buf[32];
2359
2360     if (sysinfo(SI_HW_SERIAL, buf, sizeof(buf)) < 0) {
2361         error("sysinfo: %m");
2362         return 0;
2363     }
2364     return (int) strtoul(buf, NULL, 16);
2365 }
2366
2367 static int
2368 strioctl(fd, cmd, ptr, ilen, olen)
2369     int fd, cmd, ilen, olen;
2370     void *ptr;
2371 {
2372     struct strioctl str;
2373
2374     str.ic_cmd = cmd;
2375     str.ic_timout = 0;
2376     str.ic_len = ilen;
2377     str.ic_dp = ptr;
2378     if (ioctl(fd, I_STR, &str) == -1)
2379         return -1;
2380     if (str.ic_len != olen)
2381         dbglog("strioctl: expected %d bytes, got %d for cmd %x\n",
2382                olen, str.ic_len, cmd);
2383     return 0;
2384 }
2385
2386
2387 /*
2388  * cifroute - delete a route through the addresses given.
2389  */
2390 int
2391 cifroute(u, our, his)
2392     int u;
2393     u_int32_t our, his;
2394 {
2395     struct rtentry rt;
2396
2397     memset(&rt, 0, sizeof(rt));
2398     rt.rt_dst.sa_family = AF_INET;
2399     INET_ADDR(rt.rt_dst) = his;
2400     rt.rt_gateway.sa_family = AF_INET;
2401     INET_ADDR(rt.rt_gateway) = our;
2402     rt.rt_flags = RTF_HOST;
2403
2404     if (ioctl(ipfd, SIOCDELRT, &rt) < 0) {
2405         error("Can't delete route: %m");
2406         return 0;
2407     }
2408
2409     return 1;
2410 }
2411
2412 /*
2413  * have_route_to - determine if the system has a route to the specified
2414  * IP address.  Returns 0 if not, 1 if so, -1 if we can't tell.
2415  * `addr' is in network byte order.
2416  * For demand mode to work properly, we have to ignore routes
2417  * through our own interface.
2418  */
2419 #ifndef T_CURRENT                   /* needed for Solaris 2.5 */
2420 #define T_CURRENT       MI_T_CURRENT
2421 #endif
2422
2423 int
2424 have_route_to(addr)
2425     u_int32_t addr;
2426 {
2427 #ifdef SOL2
2428     int fd, r, flags, i;
2429     struct {
2430         struct T_optmgmt_req req;
2431         struct opthdr hdr;
2432     } req;
2433     union {
2434         struct T_optmgmt_ack ack;
2435         unsigned char space[64];
2436     } ack;
2437     struct opthdr *rh;
2438     struct strbuf cbuf, dbuf;
2439     int nroutes;
2440     mib2_ipRouteEntry_t routes[8];
2441     mib2_ipRouteEntry_t *rp;
2442
2443     fd = open(mux_dev_name, O_RDWR);
2444     if (fd < 0) {
2445         warn("have_route_to: couldn't open %s: %m", mux_dev_name);
2446         return -1;
2447     }
2448
2449     req.req.PRIM_type = T_OPTMGMT_REQ;
2450     req.req.OPT_offset = (char *) &req.hdr - (char *) &req;
2451     req.req.OPT_length = sizeof(req.hdr);
2452     req.req.MGMT_flags = T_CURRENT;
2453
2454     req.hdr.level = MIB2_IP;
2455     req.hdr.name = 0;
2456     req.hdr.len = 0;
2457
2458     cbuf.buf = (char *) &req;
2459     cbuf.len = sizeof(req);
2460
2461     if (putmsg(fd, &cbuf, NULL, 0) == -1) {
2462         warn("have_route_to: putmsg: %m");
2463         close(fd);
2464         return -1;
2465     }
2466
2467     for (;;) {
2468         cbuf.buf = (char *) &ack;
2469         cbuf.maxlen = sizeof(ack);
2470         dbuf.buf = (char *) routes;
2471         dbuf.maxlen = sizeof(routes);
2472         flags = 0;
2473         r = getmsg(fd, &cbuf, &dbuf, &flags);
2474         if (r == -1) {
2475             warn("have_route_to: getmsg: %m");
2476             close(fd);
2477             return -1;
2478         }
2479
2480         if (cbuf.len < sizeof(struct T_optmgmt_ack)
2481             || ack.ack.PRIM_type != T_OPTMGMT_ACK
2482             || ack.ack.MGMT_flags != T_SUCCESS
2483             || ack.ack.OPT_length < sizeof(struct opthdr)) {
2484             dbglog("have_route_to: bad message len=%d prim=%d",
2485                    cbuf.len, ack.ack.PRIM_type);
2486             close(fd);
2487             return -1;
2488         }
2489
2490         rh = (struct opthdr *) ((char *)&ack + ack.ack.OPT_offset);
2491         if (rh->level == 0 && rh->name == 0)
2492             break;
2493         if (rh->level != MIB2_IP || rh->name != MIB2_IP_21) {
2494             while (r == MOREDATA)
2495                 r = getmsg(fd, NULL, &dbuf, &flags);
2496             continue;
2497         }
2498
2499         for (;;) {
2500             nroutes = dbuf.len / sizeof(mib2_ipRouteEntry_t);
2501             for (rp = routes, i = 0; i < nroutes; ++i, ++rp) {
2502                 if (rp->ipRouteMask != ~0) {
2503                     dbglog("have_route_to: dest=%x gw=%x mask=%x\n",
2504                            rp->ipRouteDest, rp->ipRouteNextHop,
2505                            rp->ipRouteMask);
2506                     if (((addr ^ rp->ipRouteDest) & rp->ipRouteMask) == 0
2507                         && rp->ipRouteNextHop != remote_addr)
2508                         return 1;
2509                 }
2510             }
2511             if (r == 0)
2512                 break;
2513             r = getmsg(fd, NULL, &dbuf, &flags);
2514         }
2515     }
2516     close(fd);
2517     return 0;
2518 #else
2519     return -1;
2520 #endif /* SOL2 */
2521 }
2522
2523 /*
2524  * get_pty - get a pty master/slave pair and chown the slave side to
2525  * the uid given.  Assumes slave_name points to MAXPATHLEN bytes of space.
2526  */
2527 int
2528 get_pty(master_fdp, slave_fdp, slave_name, uid)
2529     int *master_fdp;
2530     int *slave_fdp;
2531     char *slave_name;
2532     int uid;
2533 {
2534     int mfd, sfd;
2535     char *pty_name;
2536     struct termios tios;
2537
2538     mfd = open("/dev/ptmx", O_RDWR);
2539     if (mfd < 0) {
2540         error("Couldn't open pty master: %m");
2541         return 0;
2542     }
2543
2544     pty_name = ptsname(mfd);
2545     if (pty_name == NULL) {
2546         error("Couldn't get name of pty slave");
2547         close(mfd);
2548         return 0;
2549     }
2550     if (chown(pty_name, uid, -1) < 0)
2551         warn("Couldn't change owner of pty slave: %m");
2552     if (chmod(pty_name, S_IRUSR | S_IWUSR) < 0)
2553         warn("Couldn't change permissions on pty slave: %m");
2554     if (unlockpt(mfd) < 0)
2555         warn("Couldn't unlock pty slave: %m");
2556
2557     sfd = open(pty_name, O_RDWR);
2558     if (sfd < 0) {
2559         error("Couldn't open pty slave %s: %m", pty_name);
2560         close(mfd);
2561         return 0;
2562     }
2563     if (ioctl(sfd, I_PUSH, "ptem") < 0)
2564         warn("Couldn't push ptem module on pty slave: %m");
2565
2566     dbglog("Using %s", pty_name);
2567     strlcpy(slave_name, pty_name, MAXPATHLEN);
2568     *master_fdp = mfd;
2569     *slave_fdp = sfd;
2570
2571     return 1;
2572 }