iface.c revision 139977 
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: head/usr.sbin/ppp/iface.c 139977 2005-01-10 11:12:10Z brian $
27 */
28
29#include <sys/param.h>
30#include <sys/socket.h>
31#include <netinet/in.h>
32#include <net/if.h>
33#include <net/if_dl.h>
34#ifdef __FreeBSD__
35#include <net/if_var.h>
36#endif
37#include <net/route.h>
38#include <netinet/in_systm.h>
39#include <netinet/in_var.h>
40#include <netinet/ip.h>
41#ifndef NOINET6
42#include <netinet6/nd6.h>
43#endif
44#include <sys/un.h>
45
46#include <errno.h>
47#include <string.h>
48#include <stdarg.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <sys/ioctl.h>
52#include <sys/sysctl.h>
53#include <termios.h>
54#include <unistd.h>
55
56#include "layer.h"
57#include "defs.h"
58#include "command.h"
59#include "mbuf.h"
60#include "log.h"
61#include "id.h"
62#include "timer.h"
63#include "fsm.h"
64#include "iplist.h"
65#include "lqr.h"
66#include "hdlc.h"
67#include "throughput.h"
68#include "slcompress.h"
69#include "descriptor.h"
70#include "ncpaddr.h"
71#include "ipcp.h"
72#include "filter.h"
73#include "lcp.h"
74#include "ccp.h"
75#include "link.h"
76#include "mp.h"
77#ifndef NORADIUS
78#include "radius.h"
79#endif
80#include "ipv6cp.h"
81#include "ncp.h"
82#include "bundle.h"
83#include "prompt.h"
84#include "iface.h"
85
86#define IN6MASK128	{{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
87			    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
88static const struct in6_addr in6mask128 = IN6MASK128;
89
90
91struct iface *
92iface_Create(const char *name)
93{
94  int mib[6], maxtries, err;
95  size_t needed, namelen;
96  char *buf, *ptr, *end;
97  struct if_msghdr *ifm;
98  struct ifa_msghdr *ifam;
99  struct sockaddr_dl *dl;
100  struct sockaddr *sa[RTAX_MAX];
101  struct iface *iface;
102  struct iface_addr *addr;
103
104  mib[0] = CTL_NET;
105  mib[1] = PF_ROUTE;
106  mib[2] = 0;
107  mib[3] = 0;
108  mib[4] = NET_RT_IFLIST;
109  mib[5] = 0;
110
111  maxtries = 20;
112  err = 0;
113  do {
114    if (maxtries-- == 0 || (err && err != ENOMEM)) {
115      fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
116      return NULL;
117    }
118
119    if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
120      fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
121                strerror(errno));
122      return NULL;
123    }
124
125    if ((buf = (char *)malloc(needed)) == NULL) {
126      fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
127      return NULL;
128    }
129
130    if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
131      err = errno;
132      free(buf);
133      buf = NULL;
134    }
135  } while (buf == NULL);
136
137  ptr = buf;
138  end = buf + needed;
139  iface = NULL;
140  namelen = strlen(name);
141
142  while (ptr < end && iface == NULL) {
143    ifm = (struct if_msghdr *)ptr;			/* On if_msghdr */
144    if (ifm->ifm_type != RTM_IFINFO)
145      break;
146    dl = (struct sockaddr_dl *)(ifm + 1);		/* Single _dl at end */
147    if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
148      iface = (struct iface *)malloc(sizeof *iface);
149      if (iface == NULL) {
150        fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
151        return NULL;
152      }
153      iface->name = strdup(name);
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
372
373void
374iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
375{
376  int addrs, af, inskip, in6skip, s4 = -1, s6 = -1, *s;
377  unsigned n;
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
431int
432iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
433          const struct ncpaddr *peer, int how)
434{
435  int af, removed, s;
436  unsigned n;
437  struct ncpaddr ncplocal;
438  struct iface_addr *addr, newaddr;
439
440  af = ncprange_family(ifa);
441  if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
442    log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
443    return 0;
444  }
445  ncprange_getaddr(ifa, &ncplocal);
446
447  for (n = 0; n < iface->addrs; n++) {
448    if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
449        ncpaddr_equal(&iface->addr[n].peer, peer)) {
450      /* Replace this sockaddr */
451      if (!(how & IFACE_FORCE_ADD)) {
452        close(s);
453        return 0;	/* errno = EEXIST; */
454      }
455
456      if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
457          ncpaddr_equal(&iface->addr[n].peer, peer)) {
458        close(s);
459        return 1;	/* Already there */
460      }
461
462      removed = iface_addr_Zap(iface->name, iface->addr + n, s);
463      if (removed)
464        ncp_IfaceAddrDeleted(ncp, iface->addr + n);
465      ncprange_copy(&iface->addr[n].ifa, ifa);
466      ncpaddr_copy(&iface->addr[n].peer, peer);
467      if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
468        if (removed) {
469          bcopy(iface->addr + n + 1, iface->addr + n,
470                (iface->addrs - n - 1) * sizeof *iface->addr);
471          iface->addrs--;
472          n--;
473        }
474        close(s);
475        return 0;
476      }
477      close(s);
478      ncp_IfaceAddrAdded(ncp, iface->addr + n);
479      return 1;
480    }
481  }
482
483  addr = (struct iface_addr *)realloc
484    (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
485  if (addr == NULL) {
486    log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
487    close(s);
488    return 0;
489  }
490  iface->addr = addr;
491
492  ncprange_copy(&newaddr.ifa, ifa);
493  ncpaddr_copy(&newaddr.peer, peer);
494  newaddr.system = !!(how & IFACE_SYSTEM);
495  if (!iface_addr_Add(iface->name, &newaddr, s)) {
496    close(s);
497    return 0;
498  }
499
500  if (how & IFACE_ADD_FIRST) {
501    /* Stuff it at the start of our list */
502    n = 0;
503    bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
504  } else
505    n = iface->addrs;
506
507  iface->addrs++;
508  memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
509
510  close(s);
511  ncp_IfaceAddrAdded(ncp, iface->addr + n);
512
513  return 1;
514}
515
516int
517iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
518{
519  struct ncpaddr found;
520  unsigned n;
521  int res, s;
522
523  if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
524    log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
525    return 0;
526  }
527
528  for (n = res = 0; n < iface->addrs; n++) {
529    ncprange_getaddr(&iface->addr[n].ifa, &found);
530    if (ncpaddr_equal(&found, del)) {
531      if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
532        ncp_IfaceAddrDeleted(ncp, iface->addr + n);
533        bcopy(iface->addr + n + 1, iface->addr + n,
534              (iface->addrs - n - 1) * sizeof *iface->addr);
535        iface->addrs--;
536        res = 1;
537      }
538      break;
539    }
540  }
541
542  close(s);
543
544  return res;
545}
546
547#define IFACE_ADDFLAGS 1
548#define IFACE_DELFLAGS 2
549
550static int
551iface_ChangeFlags(const char *ifname, int flags, int how)
552{
553  struct ifreq ifrq;
554  int s, new_flags;
555
556  s = ID0socket(PF_INET, SOCK_DGRAM, 0);
557  if (s < 0) {
558    log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
559    return 0;
560  }
561
562  memset(&ifrq, '\0', sizeof ifrq);
563  strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
564  ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
565  if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
566    log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
567       strerror(errno));
568    close(s);
569    return 0;
570  }
571#ifdef __FreeBSD__
572  new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16);
573#else
574  new_flags = ifrq.ifr_flags & 0xffff;
575#endif
576
577  if (how == IFACE_ADDFLAGS)
578    new_flags |= flags;
579  else
580    new_flags &= ~flags;
581  ifrq.ifr_flags = new_flags & 0xffff;
582#ifdef __FreeBSD__
583  ifrq.ifr_flagshigh = new_flags >> 16;
584#endif
585
586  if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
587    log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
588       strerror(errno));
589    close(s);
590    return 0;
591  }
592  close(s);
593
594  return 1;	/* Success */
595}
596
597int
598iface_SetFlags(const char *ifname, int flags)
599{
600  return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
601}
602
603int
604iface_ClearFlags(const char *ifname, int flags)
605{
606  return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
607}
608
609void
610iface_Destroy(struct iface *iface)
611{
612  /*
613   * iface_Clear(iface, IFACE_CLEAR_ALL) must be called manually
614   * if that's what the user wants.  It's better to leave the interface
615   * allocated so that existing connections can continue to work.
616   */
617
618  if (iface != NULL) {
619    free(iface->name);
620    free(iface->addr);
621    free(iface);
622  }
623}
624
625#define if_entry(x) { IFF_##x, #x }
626
627struct {
628  int flag;
629  const char *value;
630} if_flags[] = {
631  if_entry(UP),
632  if_entry(BROADCAST),
633  if_entry(DEBUG),
634  if_entry(LOOPBACK),
635  if_entry(POINTOPOINT),
636  if_entry(RUNNING),
637  if_entry(NOARP),
638  if_entry(PROMISC),
639  if_entry(ALLMULTI),
640  if_entry(OACTIVE),
641  if_entry(SIMPLEX),
642  if_entry(LINK0),
643  if_entry(LINK1),
644  if_entry(LINK2),
645  if_entry(MULTICAST),
646  { 0, "???" }
647};
648
649int
650iface_Show(struct cmdargs const *arg)
651{
652  struct ncpaddr ncpaddr;
653  struct iface *iface = arg->bundle->iface, *current;
654  unsigned f;
655  int flags;
656#ifndef NOINET6
657  int scopeid, width;
658#endif
659  struct in_addr mask;
660
661  current = iface_Create(iface->name);
662  flags = iface->flags = current->flags;
663  iface_Destroy(current);
664
665  prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
666  for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
667    if ((if_flags[f].flag & flags)) {
668      prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
669                    if_flags[f].value);
670      flags &= ~if_flags[f].flag;
671    }
672
673#if 0
674  if (flags)
675    prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
676                  flags);
677#endif
678
679  prompt_Printf(arg->prompt, "> mtu %lu has %d address%s:\n", iface->mtu,
680                iface->addrs, iface->addrs == 1 ? "" : "es");
681
682  for (f = 0; f < iface->addrs; f++) {
683    ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
684    switch (ncprange_family(&iface->addr[f].ifa)) {
685    case AF_INET:
686      prompt_Printf(arg->prompt, "  inet %s --> ", ncpaddr_ntoa(&ncpaddr));
687      if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
688        prompt_Printf(arg->prompt, "255.255.255.255");
689      else
690        prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
691      ncprange_getip4mask(&iface->addr[f].ifa, &mask);
692      prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
693      break;
694
695#ifndef NOINET6
696    case AF_INET6:
697      prompt_Printf(arg->prompt, "  inet6 %s", ncpaddr_ntoa(&ncpaddr));
698      if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
699        prompt_Printf(arg->prompt, " --> %s",
700                      ncpaddr_ntoa(&iface->addr[f].peer));
701      ncprange_getwidth(&iface->addr[f].ifa, &width);
702      if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
703        prompt_Printf(arg->prompt, " prefixlen %d", width);
704      if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
705        prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
706      break;
707#endif
708    }
709    prompt_Printf(arg->prompt, "\n");
710  }
711
712  return 0;
713}
714
715void
716iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
717{
718  char *wp;
719  int rtax;
720
721  wp = (char *)(ifam + 1);
722
723  for (rtax = 0; rtax < RTAX_MAX; rtax++)
724    if (ifam->ifam_addrs & (1 << rtax)) {
725      sa[rtax] = (struct sockaddr *)wp;
726      wp += ROUNDUP(sa[rtax]->sa_len);
727    } else
728      sa[rtax] = NULL;
729}
730