usr.sbin/ppp/iface.c

   1 /*-
   2  * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/usr.sbin/ppp/iface.c,v 1.13.2.9 2003/04/29 16:04:41 ume Exp $
  27  * $DragonFly: src/usr.sbin/ppp/iface.c,v 1.3 2004/02/03 07:11:47 dillon Exp $
  28  */
  29
  30 #include <sys/param.h>
  31 #include <sys/socket.h>
  32 #include <netinet/in.h>
  33 #include <net/if.h>
  34 #include <net/if_dl.h>
  35 #ifdef __DragonFly__
  36 #include <net/if_var.h>
  37 #endif
  38 #include <net/route.h>
  39 #include <netinet/in_systm.h>
  40 #include <netinet/in_var.h>
  41 #include <netinet/ip.h>
  42 #ifndef NOINET6
  43 #include <netinet6/nd6.h>
  44 #endif
  45 #include <sys/un.h>
  46
  47 #include <errno.h>
  48 #include <string.h>
  49 #include <stdarg.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <sys/ioctl.h>
  53 #include <sys/sysctl.h>
  54 #include <termios.h>
  55 #include <unistd.h>
  56
  57 #include "layer.h"
  58 #include "defs.h"
  59 #include "command.h"
  60 #include "mbuf.h"
  61 #include "log.h"
  62 #include "id.h"
  63 #include "timer.h"
  64 #include "fsm.h"
  65 #include "iplist.h"
  66 #include "lqr.h"
  67 #include "hdlc.h"
  68 #include "throughput.h"
  69 #include "slcompress.h"
  70 #include "descriptor.h"
  71 #include "ncpaddr.h"
  72 #include "ipcp.h"
  73 #include "filter.h"
  74 #include "lcp.h"
  75 #include "ccp.h"
  76 #include "link.h"
  77 #include "mp.h"
  78 #ifndef NORADIUS
  79 #include "radius.h"
  80 #endif
  81 #include "ipv6cp.h"
  82 #include "ncp.h"
  83 #include "bundle.h"
  84 #include "prompt.h"
  85 #include "iface.h"
  86
  87 #define IN6MASK128      {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
  88                             0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
  89 static const struct in6_addr in6mask128 = IN6MASK128;
  90
  91
  92 struct iface *
  93 iface_Create(const char *name)
  94 {
  95   int mib[6], maxtries, err;
  96   size_t needed, namelen;
  97   char *buf, *ptr, *end;
  98   struct if_msghdr *ifm;
  99   struct ifa_msghdr *ifam;
 100   struct sockaddr_dl *dl;
 101   struct sockaddr *sa[RTAX_MAX];
 102   struct iface *iface;
 103   struct iface_addr *addr;
 104
 105   mib[0] = CTL_NET;
 106   mib[1] = PF_ROUTE;
 107   mib[2] = 0;
 108   mib[3] = 0;
 109   mib[4] = NET_RT_IFLIST;
 110   mib[5] = 0;
 111
 112   maxtries = 20;
 113   err = 0;
 114   do {
 115     if (maxtries-- == 0 || (err && err != ENOMEM)) {
 116       fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
 117       return NULL;
 118     }
 119
 120     if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
 121       fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
 122                 strerror(errno));
 123       return NULL;
 124     }
 125
 126     if ((buf = (char *)malloc(needed)) == NULL) {
 127       fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
 128       return NULL;
 129     }
 130
 131     if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
 132       err = errno;
 133       free(buf);
 134       buf = NULL;
 135     }
 136   } while (buf == NULL);
 137
 138   ptr = buf;
 139   end = buf + needed;
 140   iface = NULL;
 141   namelen = strlen(name);
 142
 143   while (ptr < end && iface == NULL) {
 144     ifm = (struct if_msghdr *)ptr;                      /* On if_msghdr */
 145     if (ifm->ifm_type != RTM_IFINFO)
 146       break;
 147     dl = (struct sockaddr_dl *)(ifm + 1);               /* Single _dl at end */
 148     if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
 149       iface = (struct iface *)malloc(sizeof *iface);
 150       if (iface == NULL) {
 151         fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
 152         return NULL;
 153       }
 154       iface->name = strdup(name);
 155       iface->index = ifm->ifm_index;
 156       iface->flags = ifm->ifm_flags;
 157       iface->mtu = 0;
 158       iface->addrs = 0;
 159       iface->addr = NULL;
 160     }
 161     ptr += ifm->ifm_msglen;                             /* First ifa_msghdr */
 162     for (; ptr < end; ptr += ifam->ifam_msglen) {
 163       ifam = (struct ifa_msghdr *)ptr;                  /* Next if address */
 164
 165       if (ifam->ifam_type != RTM_NEWADDR)               /* finished this if */
 166         break;
 167
 168       if (iface != NULL && ifam->ifam_addrs & RTA_IFA) {
 169         /* Found a configured interface ! */
 170         iface_ParseHdr(ifam, sa);
 171
 172         if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET
 173 #ifndef NOINET6
 174                              || sa[RTAX_IFA]->sa_family == AF_INET6
 175 #endif
 176                              )) {
 177           /* Record the address */
 178
 179           addr = (struct iface_addr *)
 180             realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
 181           if (addr == NULL)
 182             break;
 183           iface->addr = addr;
 184
 185           addr += iface->addrs;
 186           iface->addrs++;
 187
 188           ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]);
 189           if (sa[RTAX_BRD])
 190             ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]);
 191           else
 192             ncpaddr_init(&addr->peer);
 193         }
 194       }
 195     }
 196   }
 197
 198   free(buf);
 199
 200   return iface;
 201 }
 202
 203 static int
 204 iface_addr_Zap(const char *name, struct iface_addr *addr, int s)
 205 {
 206   struct ifaliasreq ifra;
 207 #ifndef NOINET6
 208   struct in6_aliasreq ifra6;
 209 #endif
 210   struct sockaddr_in *me4, *msk4, *peer4;
 211   struct sockaddr_storage ssme, sspeer, ssmsk;
 212   int res;
 213
 214   ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
 215   ncpaddr_getsa(&addr->peer, &sspeer);
 216   res = 0;
 217
 218   switch (ncprange_family(&addr->ifa)) {
 219   case AF_INET:
 220     memset(&ifra, '\0', sizeof ifra);
 221     strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
 222
 223     me4 = (struct sockaddr_in *)&ifra.ifra_addr;
 224     memcpy(me4, &ssme, sizeof *me4);
 225
 226     msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
 227     memcpy(msk4, &ssmsk, sizeof *msk4);
 228
 229     peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
 230     if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
 231       peer4->sin_family = AF_INET;
 232       peer4->sin_len = sizeof(*peer4);
 233       peer4->sin_addr.s_addr = INADDR_NONE;
 234     } else
 235       memcpy(peer4, &sspeer, sizeof *peer4);
 236
 237     res = ID0ioctl(s, SIOCDIFADDR, &ifra);
 238     if (log_IsKept(LogDEBUG)) {
 239       char buf[100];
 240
 241       snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
 242       log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n",
 243                  ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
 244     }
 245     break;
 246
 247 #ifndef NOINET6
 248   case AF_INET6:
 249     memset(&ifra6, '\0', sizeof ifra6);
 250     strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
 251
 252     memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
 253     memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
 254     ifra6.ifra_prefixmask.sin6_family = AF_UNSPEC;
 255     if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
 256       ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
 257     else
 258       memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
 259     ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
 260     ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
 261
 262     res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifra6);
 263     break;
 264 #endif
 265   }
 266
 267   if (res == -1) {
 268     char dst[40];
 269     const char *end =
 270 #ifndef NOINET6
 271       ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
 272 #endif
 273       "";
 274
 275     if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
 276       log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n",
 277                  end, ncprange_ntoa(&addr->ifa), strerror(errno));
 278     else {
 279       snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
 280       log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n",
 281                  end, ncprange_ntoa(&addr->ifa), dst, strerror(errno));
 282     }
 283   }
 284
 285   return res != -1;
 286 }
 287
 288 static int
 289 iface_addr_Add(const char *name, struct iface_addr *addr, int s)
 290 {
 291   struct ifaliasreq ifra;
 292 #ifndef NOINET6
 293   struct in6_aliasreq ifra6;
 294 #endif
 295   struct sockaddr_in *me4, *msk4, *peer4;
 296   struct sockaddr_storage ssme, sspeer, ssmsk;
 297   int res;
 298
 299   ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
 300   ncpaddr_getsa(&addr->peer, &sspeer);
 301   res = 0;
 302
 303   switch (ncprange_family(&addr->ifa)) {
 304   case AF_INET:
 305     memset(&ifra, '\0', sizeof ifra);
 306     strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
 307
 308     me4 = (struct sockaddr_in *)&ifra.ifra_addr;
 309     memcpy(me4, &ssme, sizeof *me4);
 310
 311     msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
 312     memcpy(msk4, &ssmsk, sizeof *msk4);
 313
 314     peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
 315     if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
 316       peer4->sin_family = AF_INET;
 317       peer4->sin_len = sizeof(*peer4);
 318       peer4->sin_addr.s_addr = INADDR_NONE;
 319     } else
 320       memcpy(peer4, &sspeer, sizeof *peer4);
 321
 322     res = ID0ioctl(s, SIOCAIFADDR, &ifra);
 323     if (log_IsKept(LogDEBUG)) {
 324       char buf[100];
 325
 326       snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
 327       log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n",
 328                  ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
 329     }
 330     break;
 331
 332 #ifndef NOINET6
 333   case AF_INET6:
 334     memset(&ifra6, '\0', sizeof ifra6);
 335     strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
 336
 337     memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
 338     memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
 339     if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
 340       ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
 341     else if (memcmp(&((struct sockaddr_in6 *)&ssmsk)->sin6_addr, &in6mask128,
 342                     sizeof in6mask128) == 0)
 343       memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
 344     ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
 345     ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
 346
 347     res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6);
 348     break;
 349 #endif
 350   }
 351
 352   if (res == -1) {
 353     char dst[40];
 354     const char *end =
 355 #ifndef NOINET6
 356       ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
 357 #endif
 358       "";
 359
 360     if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
 361       log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n",
 362                  end, ncprange_ntoa(&addr->ifa), strerror(errno));
 363     else {
 364       snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
 365       log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n",
 366                  end, ncprange_ntoa(&addr->ifa), dst, strerror(errno));
 367     }
 368   }
 369
 370   return res != -1;
 371 }
 372
 373
 374 void
 375 iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
 376 {
 377   int addrs, af, inskip, in6skip, n, s4 = -1, s6 = -1, *s;
 378
 379   if (iface->addrs) {
 380     inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
 381     addrs = 0;
 382
 383     for (n = 0; n < iface->addrs; n++) {
 384       af = ncprange_family(&iface->addr[n].ifa);
 385       if (family == 0 || family == af) {
 386         if (!iface->addr[n].system && (how & IFACE_SYSTEM))
 387           continue;
 388         switch (af) {
 389         case AF_INET:
 390           if (inskip) {
 391             inskip = 0;
 392             continue;
 393           }
 394           s = &s4;
 395           break;
 396
 397 #ifndef NOINET6
 398         case AF_INET6:
 399           if (in6skip) {
 400             in6skip = 0;
 401             continue;
 402           }
 403           s = &s6;
 404           break;
 405 #endif
 406         default:
 407           continue;
 408         }
 409
 410         if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
 411           log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
 412         else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
 413           ncp_IfaceAddrDeleted(ncp, iface->addr + n);
 414           bcopy(iface->addr + n + 1, iface->addr + n,
 415                 (iface->addrs - n - 1) * sizeof *iface->addr);
 416           iface->addrs--;
 417           n--;
 418         }
 419       }
 420     }
 421
 422     /* Don't bother realloc()ing - we have little to gain */
 423
 424     if (s4)
 425       close(s4);
 426     if (s6)
 427       close(s6);
 428   }
 429 }
 430
 431 int
 432 iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
 433           const struct ncpaddr *peer, int how)
 434 {
 435   int af, n, removed, s;
 436   struct ncpaddr ncplocal;
 437   struct iface_addr *addr, newaddr;
 438
 439   af = ncprange_family(ifa);
 440   if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
 441     log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
 442     return 0;
 443   }
 444   ncprange_getaddr(ifa, &ncplocal);
 445
 446   for (n = 0; n < iface->addrs; n++) {
 447     if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
 448         ncpaddr_equal(&iface->addr[n].peer, peer)) {
 449       /* Replace this sockaddr */
 450       if (!(how & IFACE_FORCE_ADD)) {
 451         close(s);
 452         return 0;       /* errno = EEXIST; */
 453       }
 454
 455       if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
 456           ncpaddr_equal(&iface->addr[n].peer, peer)) {
 457         close(s);
 458         return 1;       /* Already there */
 459       }
 460
 461       removed = iface_addr_Zap(iface->name, iface->addr + n, s);
 462       if (removed)
 463         ncp_IfaceAddrDeleted(ncp, iface->addr + n);
 464       ncprange_copy(&iface->addr[n].ifa, ifa);
 465       ncpaddr_copy(&iface->addr[n].peer, peer);
 466       if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
 467         if (removed) {
 468           bcopy(iface->addr + n + 1, iface->addr + n,
 469                 (iface->addrs - n - 1) * sizeof *iface->addr);
 470           iface->addrs--;
 471           n--;
 472         }
 473         close(s);
 474         return 0;
 475       }
 476       close(s);
 477       ncp_IfaceAddrAdded(ncp, iface->addr + n);
 478       return 1;
 479     }
 480   }
 481
 482   addr = (struct iface_addr *)realloc
 483     (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
 484   if (addr == NULL) {
 485     log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
 486     close(s);
 487     return 0;
 488   }
 489   iface->addr = addr;
 490
 491   ncprange_copy(&newaddr.ifa, ifa);
 492   ncpaddr_copy(&newaddr.peer, peer);
 493   newaddr.system = !!(how & IFACE_SYSTEM);
 494   if (!iface_addr_Add(iface->name, &newaddr, s)) {
 495     close(s);
 496     return 0;
 497   }
 498
 499   if (how & IFACE_ADD_FIRST) {
 500     /* Stuff it at the start of our list */
 501     n = 0;
 502     bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
 503   } else
 504     n = iface->addrs;
 505
 506   iface->addrs++;
 507   memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
 508
 509   close(s);
 510   ncp_IfaceAddrAdded(ncp, iface->addr + n);
 511
 512   return 1;
 513 }
 514
 515 int
 516 iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
 517 {
 518   struct ncpaddr found;
 519   int n, res, s;
 520
 521   if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
 522     log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
 523     return 0;
 524   }
 525
 526   for (n = res = 0; n < iface->addrs; n++) {
 527     ncprange_getaddr(&iface->addr[n].ifa, &found);
 528     if (ncpaddr_equal(&found, del)) {
 529       if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
 530         ncp_IfaceAddrDeleted(ncp, iface->addr + n);
 531         bcopy(iface->addr + n + 1, iface->addr + n,
 532               (iface->addrs - n - 1) * sizeof *iface->addr);
 533         iface->addrs--;
 534         res = 1;
 535       }
 536       break;
 537     }
 538   }
 539
 540   close(s);
 541
 542   return res;
 543 }
 544
 545 #define IFACE_ADDFLAGS 1
 546 #define IFACE_DELFLAGS 2
 547
 548 static int
 549 iface_ChangeFlags(const char *ifname, int flags, int how)
 550 {
 551   struct ifreq ifrq;
 552   int s;
 553
 554   s = ID0socket(PF_INET, SOCK_DGRAM, 0);
 555   if (s < 0) {
 556     log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
 557     return 0;
 558   }
 559
 560   memset(&ifrq, '\0', sizeof ifrq);
 561   strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
 562   ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
 563   if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
 564     log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
 565        strerror(errno));
 566     close(s);
 567     return 0;
 568   }
 569
 570   if (how == IFACE_ADDFLAGS)
 571     ifrq.ifr_flags |= flags;
 572   else
 573     ifrq.ifr_flags &= ~flags;
 574
 575   if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
 576     log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
 577        strerror(errno));
 578     close(s);
 579     return 0;
 580   }
 581   close(s);
 582
 583   return 1;     /* Success */
 584 }
 585
 586 int
 587 iface_SetFlags(const char *ifname, int flags)
 588 {
 589   return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
 590 }
 591
 592 int
 593 iface_ClearFlags(const char *ifname, int flags)
 594 {
 595   return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
 596 }
 597
 598 void
 599 iface_Destroy(struct iface *iface)
 600 {
 601   /*
 602    * iface_Clear(iface, IFACE_CLEAR_ALL) must be called manually
 603    * if that's what the user wants.  It's better to leave the interface
 604    * allocated so that existing connections can continue to work.
 605    */
 606
 607   if (iface != NULL) {
 608     free(iface->name);
 609     free(iface->addr);
 610     free(iface);
 611   }
 612 }
 613
 614 #define if_entry(x) { IFF_##x, #x }
 615
 616 struct {
 617   int flag;
 618   const char *value;
 619 } if_flags[] = {
 620   if_entry(UP),
 621   if_entry(BROADCAST),
 622   if_entry(DEBUG),
 623   if_entry(LOOPBACK),
 624   if_entry(POINTOPOINT),
 625   if_entry(RUNNING),
 626   if_entry(NOARP),
 627   if_entry(PROMISC),
 628   if_entry(ALLMULTI),
 629   if_entry(OACTIVE),
 630   if_entry(SIMPLEX),
 631   if_entry(LINK0),
 632   if_entry(LINK1),
 633   if_entry(LINK2),
 634   if_entry(MULTICAST),
 635   { 0, "???" }
 636 };
 637
 638 int
 639 iface_Show(struct cmdargs const *arg)
 640 {
 641   struct ncpaddr ncpaddr;
 642   struct iface *iface = arg->bundle->iface, *current;
 643   int f, flags;
 644 #ifndef NOINET6
 645   int scopeid, width;
 646 #endif
 647   struct in_addr mask;
 648
 649   current = iface_Create(iface->name);
 650   flags = iface->flags = current->flags;
 651   iface_Destroy(current);
 652
 653   prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
 654   for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
 655     if ((if_flags[f].flag & flags)) {
 656       prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
 657                     if_flags[f].value);
 658       flags &= ~if_flags[f].flag;
 659     }
 660
 661 #if 0
 662   if (flags)
 663     prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
 664                   flags);
 665 #endif
 666
 667   prompt_Printf(arg->prompt, "> mtu %d has %d address%s:\n", iface->mtu,
 668                 iface->addrs, iface->addrs == 1 ? "" : "es");
 669
 670   for (f = 0; f < iface->addrs; f++) {
 671     ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
 672     switch (ncprange_family(&iface->addr[f].ifa)) {
 673     case AF_INET:
 674       prompt_Printf(arg->prompt, "  inet %s --> ", ncpaddr_ntoa(&ncpaddr));
 675       if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
 676         prompt_Printf(arg->prompt, "255.255.255.255");
 677       else
 678         prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
 679       ncprange_getip4mask(&iface->addr[f].ifa, &mask);
 680       prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
 681       break;
 682
 683 #ifndef NOINET6
 684     case AF_INET6:
 685       prompt_Printf(arg->prompt, "  inet6 %s", ncpaddr_ntoa(&ncpaddr));
 686       if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
 687         prompt_Printf(arg->prompt, " --> %s",
 688                       ncpaddr_ntoa(&iface->addr[f].peer));
 689       ncprange_getwidth(&iface->addr[f].ifa, &width);
 690       if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
 691         prompt_Printf(arg->prompt, " prefixlen %d", width);
 692       if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
 693         prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
 694       break;
 695 #endif
 696     }
 697     prompt_Printf(arg->prompt, "\n");
 698   }
 699
 700   return 0;
 701 }
 702
 703 void
 704 iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
 705 {
 706   char *wp;
 707   int rtax;
 708
 709   wp = (char *)(ifam + 1);
 710
 711   for (rtax = 0; rtax < RTAX_MAX; rtax++)
 712     if (ifam->ifam_addrs & (1 << rtax)) {
 713       sa[rtax] = (struct sockaddr *)wp;
 714       wp += ROUNDUP(sa[rtax]->sa_len);
 715     } else
 716       sa[rtax] = NULL;
 717 }