iface.c revision 330449 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/usr.sbin/ppp/iface.c 330449 2018-03-05 07:26:05Z eadler $
29 */
30
31#include <sys/param.h>
32#include <sys/socket.h>
33#include <netinet/in.h>
34#include <net/if.h>
35#include <net/if_dl.h>
36#include <net/route.h>
37#include <netinet/in_systm.h>
38#include <netinet/in_var.h>
39#include <netinet/ip.h>
40#ifndef NOINET6
41#include <netinet6/nd6.h>
42#endif
43#include <sys/un.h>
44
45#include <errno.h>
46#include <string.h>
47#include <stdarg.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <sys/ioctl.h>
51#include <sys/sysctl.h>
52#include <termios.h>
53#include <unistd.h>
54
55#include "layer.h"
56#include "defs.h"
57#include "command.h"
58#include "mbuf.h"
59#include "log.h"
60#include "id.h"
61#include "timer.h"
62#include "fsm.h"
63#include "iplist.h"
64#include "lqr.h"
65#include "hdlc.h"
66#include "throughput.h"
67#include "slcompress.h"
68#include "descriptor.h"
69#include "ncpaddr.h"
70#include "ipcp.h"
71#include "filter.h"
72#include "lcp.h"
73#include "ccp.h"
74#include "link.h"
75#include "mp.h"
76#ifndef NORADIUS
77#include "radius.h"
78#endif
79#include "ipv6cp.h"
80#include "ncp.h"
81#include "bundle.h"
82#include "prompt.h"
83#include "iface.h"
84
85#define IN6MASK128	{{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
86			    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
87static const struct in6_addr in6mask128 = IN6MASK128;
88
89
90struct iface *
91iface_Create(const char *name)
92{
93  int mib[6], maxtries, err;
94  size_t needed, namelen;
95  char *buf, *ptr, *end;
96  struct if_msghdr *ifm;
97  struct ifa_msghdr *ifam;
98  struct sockaddr_dl *dl;
99  struct sockaddr *sa[RTAX_MAX];
100  struct iface *iface;
101  struct iface_addr *addr;
102
103  mib[0] = CTL_NET;
104  mib[1] = PF_ROUTE;
105  mib[2] = 0;
106  mib[3] = 0;
107  mib[4] = NET_RT_IFLIST;
108  mib[5] = 0;
109
110  maxtries = 20;
111  err = 0;
112  do {
113    if (maxtries-- == 0 || (err && err != ENOMEM)) {
114      fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
115      return NULL;
116    }
117
118    if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
119      fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
120                strerror(errno));
121      return NULL;
122    }
123
124    if ((buf = (char *)malloc(needed)) == NULL) {
125      fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
126      return NULL;
127    }
128
129    if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
130      err = errno;
131      free(buf);
132      buf = NULL;
133    }
134  } while (buf == NULL);
135
136  ptr = buf;
137  end = buf + needed;
138  iface = NULL;
139  namelen = strlen(name);
140
141  while (ptr < end && iface == NULL) {
142    ifm = (struct if_msghdr *)ptr;			/* On if_msghdr */
143    if (ifm->ifm_type != RTM_IFINFO)
144      break;
145    dl = (struct sockaddr_dl *)(ifm + 1);		/* Single _dl at end */
146    if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
147      iface = (struct iface *)malloc(sizeof *iface);
148      if (iface == NULL) {
149        fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
150        return NULL;
151      }
152      iface->name = strdup(name);
153      iface->descr = NULL;
154      iface->index = ifm->ifm_index;
155      iface->flags = ifm->ifm_flags;
156      iface->mtu = 0;
157      iface->addrs = 0;
158      iface->addr = NULL;
159    }
160    ptr += ifm->ifm_msglen;				/* First ifa_msghdr */
161    for (; ptr < end; ptr += ifam->ifam_msglen) {
162      ifam = (struct ifa_msghdr *)ptr;			/* Next if address */
163
164      if (ifam->ifam_type != RTM_NEWADDR)		/* finished this if */
165        break;
166
167      if (iface != NULL && ifam->ifam_addrs & RTA_IFA) {
168        /* Found a configured interface ! */
169        iface_ParseHdr(ifam, sa);
170
171        if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET
172#ifndef NOINET6
173                             || sa[RTAX_IFA]->sa_family == AF_INET6
174#endif
175                             )) {
176          /* Record the address */
177
178          addr = (struct iface_addr *)
179            realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
180          if (addr == NULL)
181            break;
182          iface->addr = addr;
183
184          addr += iface->addrs;
185          iface->addrs++;
186
187          ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]);
188          if (sa[RTAX_BRD])
189            ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]);
190          else
191            ncpaddr_init(&addr->peer);
192        }
193      }
194    }
195  }
196
197  free(buf);
198
199  return iface;
200}
201
202static int
203iface_addr_Zap(const char *name, struct iface_addr *addr, int s)
204{
205  struct ifaliasreq ifra;
206#ifndef NOINET6
207  struct in6_aliasreq ifra6;
208#endif
209  struct sockaddr_in *me4, *msk4, *peer4;
210  struct sockaddr_storage ssme, sspeer, ssmsk;
211  int res;
212
213  ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
214  ncpaddr_getsa(&addr->peer, &sspeer);
215  res = 0;
216
217  switch (ncprange_family(&addr->ifa)) {
218  case AF_INET:
219    memset(&ifra, '\0', sizeof ifra);
220    strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
221
222    me4 = (struct sockaddr_in *)&ifra.ifra_addr;
223    memcpy(me4, &ssme, sizeof *me4);
224
225    msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
226    memcpy(msk4, &ssmsk, sizeof *msk4);
227
228    peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
229    if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
230      peer4->sin_family = AF_INET;
231      peer4->sin_len = sizeof(*peer4);
232      peer4->sin_addr.s_addr = INADDR_NONE;
233    } else
234      memcpy(peer4, &sspeer, sizeof *peer4);
235
236    res = ID0ioctl(s, SIOCDIFADDR, &ifra);
237    if (log_IsKept(LogDEBUG)) {
238      char buf[100];
239
240      snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
241      log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n",
242                 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
243    }
244    break;
245
246#ifndef NOINET6
247  case AF_INET6:
248    memset(&ifra6, '\0', sizeof ifra6);
249    strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
250
251    memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
252    memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
253    ifra6.ifra_prefixmask.sin6_family = AF_UNSPEC;
254    if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
255      ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
256    else
257      memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
258    ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
259    ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
260
261    res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifra6);
262    break;
263#endif
264  }
265
266  if (res == -1) {
267    char dst[40];
268    const char *end =
269#ifndef NOINET6
270      ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
271#endif
272      "";
273
274    if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
275      log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n",
276                 end, ncprange_ntoa(&addr->ifa), strerror(errno));
277    else {
278      snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
279      log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n",
280                 end, ncprange_ntoa(&addr->ifa), dst, strerror(errno));
281    }
282  }
283
284  return res != -1;
285}
286
287static int
288iface_addr_Add(const char *name, struct iface_addr *addr, int s)
289{
290  struct ifaliasreq ifra;
291#ifndef NOINET6
292  struct in6_aliasreq ifra6;
293#endif
294  struct sockaddr_in *me4, *msk4, *peer4;
295  struct sockaddr_storage ssme, sspeer, ssmsk;
296  int res;
297
298  ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
299  ncpaddr_getsa(&addr->peer, &sspeer);
300  res = 0;
301
302  switch (ncprange_family(&addr->ifa)) {
303  case AF_INET:
304    memset(&ifra, '\0', sizeof ifra);
305    strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
306
307    me4 = (struct sockaddr_in *)&ifra.ifra_addr;
308    memcpy(me4, &ssme, sizeof *me4);
309
310    msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
311    memcpy(msk4, &ssmsk, sizeof *msk4);
312
313    peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
314    if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
315      peer4->sin_family = AF_INET;
316      peer4->sin_len = sizeof(*peer4);
317      peer4->sin_addr.s_addr = INADDR_NONE;
318    } else
319      memcpy(peer4, &sspeer, sizeof *peer4);
320
321    res = ID0ioctl(s, SIOCAIFADDR, &ifra);
322    if (log_IsKept(LogDEBUG)) {
323      char buf[100];
324
325      snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
326      log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n",
327                 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
328    }
329    break;
330
331#ifndef NOINET6
332  case AF_INET6:
333    memset(&ifra6, '\0', sizeof ifra6);
334    strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
335
336    memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
337    memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
338    if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
339      ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
340    else if (memcmp(&((struct sockaddr_in6 *)&ssmsk)->sin6_addr, &in6mask128,
341		    sizeof in6mask128) == 0)
342      memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
343    ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
344    ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
345
346    res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6);
347    break;
348#endif
349  }
350
351  if (res == -1) {
352    char dst[40];
353    const char *end =
354#ifndef NOINET6
355      ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
356#endif
357      "";
358
359    if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
360      log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n",
361                 end, ncprange_ntoa(&addr->ifa), strerror(errno));
362    else {
363      snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
364      log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n",
365                 end, ncprange_ntoa(&addr->ifa), dst, strerror(errno));
366    }
367  }
368
369  return res != -1;
370}
371
372int
373iface_Name(struct iface *iface, const char *name)
374{
375  struct ifreq ifr;
376  int s;
377  char *newname;
378
379  if ((newname = strdup(name)) == NULL) {
380    log_Printf(LogWARN, "iface name: strdup failed: %s\n", strerror(errno));
381    return 0;
382  }
383
384  if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
385    log_Printf(LogERROR, "iface name: socket(): %s\n", strerror(errno));
386    free(newname);
387    return 0;
388  }
389
390  strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
391  ifr.ifr_data = newname;
392  if (ID0ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
393    log_Printf(LogWARN, "iface name: ioctl(SIOCSIFNAME, %s -> %s): %s\n",
394               name, newname, strerror(errno));
395    free(newname);
396    return 0;
397  }
398
399  free(iface->name);
400  iface->name = newname;
401
402  return 1;
403}
404
405int
406iface_Descr(struct cmdargs const *arg)
407{
408  struct ifreq ifr;
409  struct iface *iface;
410  size_t sz, len;
411  int s, n, ifdescr_maxlen;
412  char *descr;
413
414  sz = sizeof(int);
415  if (sysctlbyname("net.ifdescr_maxlen", &ifdescr_maxlen, &sz, NULL, 0) < 0) {
416    log_Printf(LogERROR, "iface descr: sysctl failed: %s\n", strerror(errno));
417    return 1;
418  }
419
420  if (ifdescr_maxlen < 1) {
421    log_Printf(LogERROR, "iface descr: sysctl net.ifdescr_maxlen < 1\n");
422    return 1;
423  }
424
425  sz = sizeof(char) * ifdescr_maxlen;
426  if ((descr = malloc(sz)) == NULL) {
427    log_Printf(LogERROR, "iface descr: malloc failed: %s\n", strerror(errno));
428    return 1;
429  }
430
431  *descr = '\0';
432  n = arg->argn;
433  while (n < arg->argc) {
434    if (n > arg->argn && (len = strlcat(descr, " ", sz)) >= sz)
435      break;
436    if ((len = strlcat(descr, arg->argv[n], sz)) >= sz)
437      break;
438    ++n;
439  }
440  if (len >= sz) {
441    log_Printf(LogERROR, "iface descr: description exceeds maximum (%d)\n",
442               ifdescr_maxlen-1);
443    free(descr);
444    return 1;
445  }
446
447  if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
448    log_Printf(LogERROR, "iface descr: socket(): %s\n", strerror(errno));
449    free(descr);
450    return 1;
451  }
452
453  iface = arg->bundle->iface;
454  strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
455  ifr.ifr_buffer.length = strlen(descr) + 1;
456  ifr.ifr_buffer.buffer = descr;
457  if (ID0ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) {
458    log_Printf(LogWARN, "iface descr: ioctl(SIOCSIFDESCR, %s): %s\n",
459               descr, strerror(errno));
460    free(descr);
461    return 1;
462  }
463
464  free(iface->descr);
465  iface->descr = descr;
466
467  return 0;
468}
469
470void
471iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
472{
473  int af, inskip, in6skip, s4 = -1, s6 = -1, *s;
474  unsigned n;
475
476  if (iface->addrs) {
477    inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
478
479    for (n = 0; n < iface->addrs; n++) {
480      af = ncprange_family(&iface->addr[n].ifa);
481      if (family == 0 || family == af) {
482        if (!iface->addr[n].system && (how & IFACE_SYSTEM))
483          continue;
484        switch (af) {
485        case AF_INET:
486          if (inskip) {
487            inskip = 0;
488            continue;
489          }
490          s = &s4;
491          break;
492
493#ifndef NOINET6
494        case AF_INET6:
495          if (in6skip) {
496            in6skip = 0;
497            continue;
498          }
499          s = &s6;
500          break;
501#endif
502        default:
503          continue;
504        }
505
506        if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
507          log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
508        else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
509          ncp_IfaceAddrDeleted(ncp, iface->addr + n);
510          bcopy(iface->addr + n + 1, iface->addr + n,
511                (iface->addrs - n - 1) * sizeof *iface->addr);
512          iface->addrs--;
513          n--;
514        }
515      }
516    }
517
518    /* Don't bother realloc()ing - we have little to gain */
519
520    if (s4)
521      close(s4);
522    if (s6)
523      close(s6);
524  }
525}
526
527int
528iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
529          const struct ncpaddr *peer, int how)
530{
531  int af, removed, s;
532  unsigned n;
533  struct ncpaddr ncplocal;
534  struct iface_addr *addr, newaddr;
535
536  af = ncprange_family(ifa);
537  if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
538    log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
539    return 0;
540  }
541  ncprange_getaddr(ifa, &ncplocal);
542
543  for (n = 0; n < iface->addrs; n++) {
544    if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
545        ncpaddr_equal(&iface->addr[n].peer, peer)) {
546      /* Replace this sockaddr */
547      if (!(how & IFACE_FORCE_ADD)) {
548        close(s);
549        return 0;	/* errno = EEXIST; */
550      }
551
552      if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
553          ncpaddr_equal(&iface->addr[n].peer, peer)) {
554        close(s);
555        ncp_IfaceAddrAdded(ncp, iface->addr + n);
556        return 1;	/* Already there */
557      }
558
559      removed = iface_addr_Zap(iface->name, iface->addr + n, s);
560      if (removed)
561        ncp_IfaceAddrDeleted(ncp, iface->addr + n);
562      ncprange_copy(&iface->addr[n].ifa, ifa);
563      ncpaddr_copy(&iface->addr[n].peer, peer);
564      if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
565        if (removed) {
566          bcopy(iface->addr + n + 1, iface->addr + n,
567                (iface->addrs - n - 1) * sizeof *iface->addr);
568          iface->addrs--;
569          n--;
570        }
571        close(s);
572        return 0;
573      }
574      close(s);
575      ncp_IfaceAddrAdded(ncp, iface->addr + n);
576      return 1;
577    }
578  }
579
580  addr = (struct iface_addr *)realloc
581    (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
582  if (addr == NULL) {
583    log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
584    close(s);
585    return 0;
586  }
587  iface->addr = addr;
588
589  ncprange_copy(&newaddr.ifa, ifa);
590  ncpaddr_copy(&newaddr.peer, peer);
591  newaddr.system = !!(how & IFACE_SYSTEM);
592  if (!iface_addr_Add(iface->name, &newaddr, s)) {
593    close(s);
594    return 0;
595  }
596
597  if (how & IFACE_ADD_FIRST) {
598    /* Stuff it at the start of our list */
599    n = 0;
600    bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
601  } else
602    n = iface->addrs;
603
604  iface->addrs++;
605  memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
606
607  close(s);
608  ncp_IfaceAddrAdded(ncp, iface->addr + n);
609
610  return 1;
611}
612
613int
614iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
615{
616  struct ncpaddr found;
617  unsigned n;
618  int res, s;
619
620  if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
621    log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
622    return 0;
623  }
624
625  for (n = res = 0; n < iface->addrs; n++) {
626    ncprange_getaddr(&iface->addr[n].ifa, &found);
627    if (ncpaddr_equal(&found, del)) {
628      if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
629        ncp_IfaceAddrDeleted(ncp, iface->addr + n);
630        bcopy(iface->addr + n + 1, iface->addr + n,
631              (iface->addrs - n - 1) * sizeof *iface->addr);
632        iface->addrs--;
633        res = 1;
634      }
635      break;
636    }
637  }
638
639  close(s);
640
641  return res;
642}
643
644#define IFACE_ADDFLAGS 1
645#define IFACE_DELFLAGS 2
646
647static int
648iface_ChangeFlags(const char *ifname, int flags, int how)
649{
650  struct ifreq ifrq;
651  int s, new_flags;
652
653  s = ID0socket(PF_INET, SOCK_DGRAM, 0);
654  if (s < 0) {
655    log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
656    return 0;
657  }
658
659  memset(&ifrq, '\0', sizeof ifrq);
660  strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
661  ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
662  if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
663    log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
664       strerror(errno));
665    close(s);
666    return 0;
667  }
668#ifdef __FreeBSD__
669  new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16);
670#else
671  new_flags = ifrq.ifr_flags & 0xffff;
672#endif
673
674  if (how == IFACE_ADDFLAGS)
675    new_flags |= flags;
676  else
677    new_flags &= ~flags;
678  ifrq.ifr_flags = new_flags & 0xffff;
679#ifdef __FreeBSD__
680  ifrq.ifr_flagshigh = new_flags >> 16;
681#endif
682
683  if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
684    log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
685       strerror(errno));
686    close(s);
687    return 0;
688  }
689  close(s);
690
691  return 1;	/* Success */
692}
693
694int
695iface_SetFlags(const char *ifname, int flags)
696{
697  return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
698}
699
700int
701iface_ClearFlags(const char *ifname, int flags)
702{
703  return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
704}
705
706void
707iface_Free(struct iface *iface)
708{
709    free(iface->name);
710    free(iface->descr);
711    free(iface->addr);
712    free(iface);
713}
714
715void
716iface_Destroy(struct iface *iface)
717{
718  struct ifreq ifr;
719  int s;
720
721  if (iface != NULL) {
722    if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
723      log_Printf(LogERROR, "iface_Destroy: socket(): %s\n", strerror(errno));
724    } else {
725      strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
726      if (ID0ioctl(s, SIOCIFDESTROY, (caddr_t)&ifr) < 0)
727        log_Printf(LogWARN, "iface_Destroy: ioctl(SIOCIFDESTROY, %s): %s\n",
728               iface->name, strerror(errno));
729    }
730    iface_Free(iface);
731  }
732}
733
734#define if_entry(x) { IFF_##x, #x }
735
736struct {
737  int flag;
738  const char *value;
739} if_flags[] = {
740  if_entry(UP),
741  if_entry(BROADCAST),
742  if_entry(DEBUG),
743  if_entry(LOOPBACK),
744  if_entry(POINTOPOINT),
745  if_entry(RUNNING),
746  if_entry(NOARP),
747  if_entry(PROMISC),
748  if_entry(ALLMULTI),
749  if_entry(OACTIVE),
750  if_entry(SIMPLEX),
751  if_entry(LINK0),
752  if_entry(LINK1),
753  if_entry(LINK2),
754  if_entry(MULTICAST),
755  { 0, "???" }
756};
757
758int
759iface_Show(struct cmdargs const *arg)
760{
761  struct ncpaddr ncpaddr;
762  struct iface *iface = arg->bundle->iface, *current;
763  unsigned f;
764  int flags;
765#ifndef NOINET6
766  int scopeid, width;
767#endif
768  struct in_addr mask;
769
770  current = iface_Create(iface->name);
771  flags = iface->flags = current->flags;
772  iface_Free(current);
773
774  prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
775  for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
776    if ((if_flags[f].flag & flags)) {
777      prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
778                    if_flags[f].value);
779      flags &= ~if_flags[f].flag;
780    }
781
782#if 0
783  if (flags)
784    prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
785                  flags);
786#endif
787
788  prompt_Printf(arg->prompt, "> mtu %lu has %d address%s:\n", iface->mtu,
789                iface->addrs, iface->addrs == 1 ? "" : "es");
790
791  for (f = 0; f < iface->addrs; f++) {
792    ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
793    switch (ncprange_family(&iface->addr[f].ifa)) {
794    case AF_INET:
795      prompt_Printf(arg->prompt, "  inet %s --> ", ncpaddr_ntoa(&ncpaddr));
796      if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
797        prompt_Printf(arg->prompt, "255.255.255.255");
798      else
799        prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
800      ncprange_getip4mask(&iface->addr[f].ifa, &mask);
801      prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
802      break;
803
804#ifndef NOINET6
805    case AF_INET6:
806      prompt_Printf(arg->prompt, "  inet6 %s", ncpaddr_ntoa(&ncpaddr));
807      if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
808        prompt_Printf(arg->prompt, " --> %s",
809                      ncpaddr_ntoa(&iface->addr[f].peer));
810      ncprange_getwidth(&iface->addr[f].ifa, &width);
811      if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
812        prompt_Printf(arg->prompt, " prefixlen %d", width);
813      if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
814        prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
815      break;
816#endif
817    }
818    prompt_Printf(arg->prompt, "\n");
819  }
820
821  return 0;
822}
823
824void
825iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
826{
827  char *wp;
828  int rtax;
829
830  wp = (char *)(ifam + 1);
831
832  for (rtax = 0; rtax < RTAX_MAX; rtax++)
833    if (ifam->ifam_addrs & (1 << rtax)) {
834      sa[rtax] = (struct sockaddr *)wp;
835      wp += ROUNDUP(sa[rtax]->sa_len);
836    } else
837      sa[rtax] = NULL;
838}
839