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 113067 2003-04-04 11:09:08Z ume $
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, n, s4 = -1, s6 = -1, *s;
377
378 if (iface->addrs) {
379 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
380 addrs = 0;
381
382 for (n = 0; n < iface->addrs; n++) {
383 af = ncprange_family(&iface->addr[n].ifa);
384 if (family == 0 || family == af) {
385 if (!iface->addr[n].system && (how & IFACE_SYSTEM))
386 continue;
387 switch (af) {
388 case AF_INET:
389 if (inskip) {
390 inskip = 0;
391 continue;
392 }
393 s = &s4;
394 break;
395
396#ifndef NOINET6
397 case AF_INET6:
398 if (in6skip) {
399 in6skip = 0;
400 continue;
401 }
402 s = &s6;
403 break;
404#endif
405 default:
406 continue;
407 }
408
409 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
410 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
411 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
412 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
413 bcopy(iface->addr + n + 1, iface->addr + n,
414 (iface->addrs - n - 1) * sizeof *iface->addr);
415 iface->addrs--;
416 n--;
417 }
418 }
419 }
420
421 /* Don't bother realloc()ing - we have little to gain */
422
423 if (s4)
424 close(s4);
425 if (s6)
426 close(s6);
427 }
428}
429
430int
431iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
432 const struct ncpaddr *peer, int how)
433{
434 int af, n, removed, s;
435 struct ncpaddr ncplocal;
436 struct iface_addr *addr, newaddr;
437
438 af = ncprange_family(ifa);
439 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
440 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
441 return 0;
442 }
443 ncprange_getaddr(ifa, &ncplocal);
444
445 for (n = 0; n < iface->addrs; n++) {
446 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
447 ncpaddr_equal(&iface->addr[n].peer, peer)) {
448 /* Replace this sockaddr */
449 if (!(how & IFACE_FORCE_ADD)) {
450 close(s);
451 return 0; /* errno = EEXIST; */
452 }
453
454 if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
455 ncpaddr_equal(&iface->addr[n].peer, peer)) {
456 close(s);
457 return 1; /* Already there */
458 }
459
460 removed = iface_addr_Zap(iface->name, iface->addr + n, s);
461 if (removed)
462 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
463 ncprange_copy(&iface->addr[n].ifa, ifa);
464 ncpaddr_copy(&iface->addr[n].peer, peer);
465 if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
466 if (removed) {
467 bcopy(iface->addr + n + 1, iface->addr + n,
468 (iface->addrs - n - 1) * sizeof *iface->addr);
469 iface->addrs--;
470 n--;
471 }
472 close(s);
473 return 0;
474 }
475 close(s);
476 ncp_IfaceAddrAdded(ncp, iface->addr + n);
477 return 1;
478 }
479 }
480
481 addr = (struct iface_addr *)realloc
482 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
483 if (addr == NULL) {
484 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
485 close(s);
486 return 0;
487 }
488 iface->addr = addr;
489
490 ncprange_copy(&newaddr.ifa, ifa);
491 ncpaddr_copy(&newaddr.peer, peer);
492 newaddr.system = !!(how & IFACE_SYSTEM);
493 if (!iface_addr_Add(iface->name, &newaddr, s)) {
494 close(s);
495 return 0;
496 }
497
498 if (how & IFACE_ADD_FIRST) {
499 /* Stuff it at the start of our list */
500 n = 0;
501 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
502 } else
503 n = iface->addrs;
504
505 iface->addrs++;
506 memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
507
508 close(s);
509 ncp_IfaceAddrAdded(ncp, iface->addr + n);
510
511 return 1;
512}
513
514int
515iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
516{
517 struct ncpaddr found;
518 int n, res, s;
519
520 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
521 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
522 return 0;
523 }
524
525 for (n = res = 0; n < iface->addrs; n++) {
526 ncprange_getaddr(&iface->addr[n].ifa, &found);
527 if (ncpaddr_equal(&found, del)) {
528 if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
529 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
530 bcopy(iface->addr + n + 1, iface->addr + n,
531 (iface->addrs - n - 1) * sizeof *iface->addr);
532 iface->addrs--;
533 res = 1;
534 }
535 break;
536 }
537 }
538
539 close(s);
540
541 return res;
542}
543
544#define IFACE_ADDFLAGS 1
545#define IFACE_DELFLAGS 2
546
547static int
548iface_ChangeFlags(const char *ifname, int flags, int how)
549{
550 struct ifreq ifrq;
551 int s, new_flags;
552
553 s = ID0socket(PF_INET, SOCK_DGRAM, 0);
554 if (s < 0) {
555 log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
556 return 0;
557 }
558
559 memset(&ifrq, '\0', sizeof ifrq);
560 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
561 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
562 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
563 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
564 strerror(errno));
565 close(s);
566 return 0;
567 }
568 new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16);
569
570 if (how == IFACE_ADDFLAGS)
571 new_flags |= flags;
572 else
573 new_flags &= ~flags;
574 ifrq.ifr_flags = new_flags & 0xffff;
575 ifrq.ifr_flagshigh = new_flags >> 16;
576
577 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
578 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
579 strerror(errno));
580 close(s);
581 return 0;
582 }
583 close(s);
584
585 return 1; /* Success */
586}
587
588int
589iface_SetFlags(const char *ifname, int flags)
590{
591 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
592}
593
594int
595iface_ClearFlags(const char *ifname, int flags)
596{
597 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
598}
599
600void
601iface_Destroy(struct iface *iface)
602{
603 /*
604 * iface_Clear(iface, IFACE_CLEAR_ALL) must be called manually
605 * if that's what the user wants. It's better to leave the interface
606 * allocated so that existing connections can continue to work.
607 */
608
609 if (iface != NULL) {
610 free(iface->name);
611 free(iface->addr);
612 free(iface);
613 }
614}
615
616#define if_entry(x) { IFF_##x, #x }
617
618struct {
619 int flag;
620 const char *value;
621} if_flags[] = {
622 if_entry(UP),
623 if_entry(BROADCAST),
624 if_entry(DEBUG),
625 if_entry(LOOPBACK),
626 if_entry(POINTOPOINT),
627 if_entry(RUNNING),
628 if_entry(NOARP),
629 if_entry(PROMISC),
630 if_entry(ALLMULTI),
631 if_entry(OACTIVE),
632 if_entry(SIMPLEX),
633 if_entry(LINK0),
634 if_entry(LINK1),
635 if_entry(LINK2),
636 if_entry(MULTICAST),
637 { 0, "???" }
638};
639
640int
641iface_Show(struct cmdargs const *arg)
642{
643 struct ncpaddr ncpaddr;
644 struct iface *iface = arg->bundle->iface, *current;
645 int f, flags;
646#ifndef NOINET6
647 int scopeid, width;
648#endif
649 struct in_addr mask;
650
651 current = iface_Create(iface->name);
652 flags = iface->flags = current->flags;
653 iface_Destroy(current);
654
655 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
656 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
657 if ((if_flags[f].flag & flags)) {
658 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
659 if_flags[f].value);
660 flags &= ~if_flags[f].flag;
661 }
662
663#if 0
664 if (flags)
665 prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
666 flags);
667#endif
668
669 prompt_Printf(arg->prompt, "> mtu %d has %d address%s:\n", iface->mtu,
670 iface->addrs, iface->addrs == 1 ? "" : "es");
671
672 for (f = 0; f < iface->addrs; f++) {
673 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
674 switch (ncprange_family(&iface->addr[f].ifa)) {
675 case AF_INET:
676 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr));
677 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
678 prompt_Printf(arg->prompt, "255.255.255.255");
679 else
680 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
681 ncprange_getip4mask(&iface->addr[f].ifa, &mask);
682 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
683 break;
684
685#ifndef NOINET6
686 case AF_INET6:
687 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr));
688 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
689 prompt_Printf(arg->prompt, " --> %s",
690 ncpaddr_ntoa(&iface->addr[f].peer));
691 ncprange_getwidth(&iface->addr[f].ifa, &width);
692 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
693 prompt_Printf(arg->prompt, " prefixlen %d", width);
694 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
695 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
696 break;
697#endif
698 }
699 prompt_Printf(arg->prompt, "\n");
700 }
701
702 return 0;
703}
704
705void
706iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
707{
708 char *wp;
709 int rtax;
710
711 wp = (char *)(ifam + 1);
712
713 for (rtax = 0; rtax < RTAX_MAX; rtax++)
714 if (ifam->ifam_addrs & (1 << rtax)) {
715 sa[rtax] = (struct sockaddr *)wp;
716 wp += ROUNDUP(sa[rtax]->sa_len);
717 } else
718 sa[rtax] = NULL;
719}
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 113067 2003-04-04 11:09:08Z ume $
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, n, s4 = -1, s6 = -1, *s;
377
378 if (iface->addrs) {
379 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
380 addrs = 0;
381
382 for (n = 0; n < iface->addrs; n++) {
383 af = ncprange_family(&iface->addr[n].ifa);
384 if (family == 0 || family == af) {
385 if (!iface->addr[n].system && (how & IFACE_SYSTEM))
386 continue;
387 switch (af) {
388 case AF_INET:
389 if (inskip) {
390 inskip = 0;
391 continue;
392 }
393 s = &s4;
394 break;
395
396#ifndef NOINET6
397 case AF_INET6:
398 if (in6skip) {
399 in6skip = 0;
400 continue;
401 }
402 s = &s6;
403 break;
404#endif
405 default:
406 continue;
407 }
408
409 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
410 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
411 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
412 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
413 bcopy(iface->addr + n + 1, iface->addr + n,
414 (iface->addrs - n - 1) * sizeof *iface->addr);
415 iface->addrs--;
416 n--;
417 }
418 }
419 }
420
421 /* Don't bother realloc()ing - we have little to gain */
422
423 if (s4)
424 close(s4);
425 if (s6)
426 close(s6);
427 }
428}
429
430int
431iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
432 const struct ncpaddr *peer, int how)
433{
434 int af, n, removed, s;
435 struct ncpaddr ncplocal;
436 struct iface_addr *addr, newaddr;
437
438 af = ncprange_family(ifa);
439 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
440 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
441 return 0;
442 }
443 ncprange_getaddr(ifa, &ncplocal);
444
445 for (n = 0; n < iface->addrs; n++) {
446 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
447 ncpaddr_equal(&iface->addr[n].peer, peer)) {
448 /* Replace this sockaddr */
449 if (!(how & IFACE_FORCE_ADD)) {
450 close(s);
451 return 0; /* errno = EEXIST; */
452 }
453
454 if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
455 ncpaddr_equal(&iface->addr[n].peer, peer)) {
456 close(s);
457 return 1; /* Already there */
458 }
459
460 removed = iface_addr_Zap(iface->name, iface->addr + n, s);
461 if (removed)
462 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
463 ncprange_copy(&iface->addr[n].ifa, ifa);
464 ncpaddr_copy(&iface->addr[n].peer, peer);
465 if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
466 if (removed) {
467 bcopy(iface->addr + n + 1, iface->addr + n,
468 (iface->addrs - n - 1) * sizeof *iface->addr);
469 iface->addrs--;
470 n--;
471 }
472 close(s);
473 return 0;
474 }
475 close(s);
476 ncp_IfaceAddrAdded(ncp, iface->addr + n);
477 return 1;
478 }
479 }
480
481 addr = (struct iface_addr *)realloc
482 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
483 if (addr == NULL) {
484 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
485 close(s);
486 return 0;
487 }
488 iface->addr = addr;
489
490 ncprange_copy(&newaddr.ifa, ifa);
491 ncpaddr_copy(&newaddr.peer, peer);
492 newaddr.system = !!(how & IFACE_SYSTEM);
493 if (!iface_addr_Add(iface->name, &newaddr, s)) {
494 close(s);
495 return 0;
496 }
497
498 if (how & IFACE_ADD_FIRST) {
499 /* Stuff it at the start of our list */
500 n = 0;
501 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
502 } else
503 n = iface->addrs;
504
505 iface->addrs++;
506 memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
507
508 close(s);
509 ncp_IfaceAddrAdded(ncp, iface->addr + n);
510
511 return 1;
512}
513
514int
515iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
516{
517 struct ncpaddr found;
518 int n, res, s;
519
520 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
521 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
522 return 0;
523 }
524
525 for (n = res = 0; n < iface->addrs; n++) {
526 ncprange_getaddr(&iface->addr[n].ifa, &found);
527 if (ncpaddr_equal(&found, del)) {
528 if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
529 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
530 bcopy(iface->addr + n + 1, iface->addr + n,
531 (iface->addrs - n - 1) * sizeof *iface->addr);
532 iface->addrs--;
533 res = 1;
534 }
535 break;
536 }
537 }
538
539 close(s);
540
541 return res;
542}
543
544#define IFACE_ADDFLAGS 1
545#define IFACE_DELFLAGS 2
546
547static int
548iface_ChangeFlags(const char *ifname, int flags, int how)
549{
550 struct ifreq ifrq;
551 int s, new_flags;
552
553 s = ID0socket(PF_INET, SOCK_DGRAM, 0);
554 if (s < 0) {
555 log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
556 return 0;
557 }
558
559 memset(&ifrq, '\0', sizeof ifrq);
560 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
561 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
562 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
563 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
564 strerror(errno));
565 close(s);
566 return 0;
567 }
568 new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16);
569
570 if (how == IFACE_ADDFLAGS)
571 new_flags |= flags;
572 else
573 new_flags &= ~flags;
574 ifrq.ifr_flags = new_flags & 0xffff;
575 ifrq.ifr_flagshigh = new_flags >> 16;
576
577 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
578 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
579 strerror(errno));
580 close(s);
581 return 0;
582 }
583 close(s);
584
585 return 1; /* Success */
586}
587
588int
589iface_SetFlags(const char *ifname, int flags)
590{
591 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
592}
593
594int
595iface_ClearFlags(const char *ifname, int flags)
596{
597 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
598}
599
600void
601iface_Destroy(struct iface *iface)
602{
603 /*
604 * iface_Clear(iface, IFACE_CLEAR_ALL) must be called manually
605 * if that's what the user wants. It's better to leave the interface
606 * allocated so that existing connections can continue to work.
607 */
608
609 if (iface != NULL) {
610 free(iface->name);
611 free(iface->addr);
612 free(iface);
613 }
614}
615
616#define if_entry(x) { IFF_##x, #x }
617
618struct {
619 int flag;
620 const char *value;
621} if_flags[] = {
622 if_entry(UP),
623 if_entry(BROADCAST),
624 if_entry(DEBUG),
625 if_entry(LOOPBACK),
626 if_entry(POINTOPOINT),
627 if_entry(RUNNING),
628 if_entry(NOARP),
629 if_entry(PROMISC),
630 if_entry(ALLMULTI),
631 if_entry(OACTIVE),
632 if_entry(SIMPLEX),
633 if_entry(LINK0),
634 if_entry(LINK1),
635 if_entry(LINK2),
636 if_entry(MULTICAST),
637 { 0, "???" }
638};
639
640int
641iface_Show(struct cmdargs const *arg)
642{
643 struct ncpaddr ncpaddr;
644 struct iface *iface = arg->bundle->iface, *current;
645 int f, flags;
646#ifndef NOINET6
647 int scopeid, width;
648#endif
649 struct in_addr mask;
650
651 current = iface_Create(iface->name);
652 flags = iface->flags = current->flags;
653 iface_Destroy(current);
654
655 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
656 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
657 if ((if_flags[f].flag & flags)) {
658 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
659 if_flags[f].value);
660 flags &= ~if_flags[f].flag;
661 }
662
663#if 0
664 if (flags)
665 prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
666 flags);
667#endif
668
669 prompt_Printf(arg->prompt, "> mtu %d has %d address%s:\n", iface->mtu,
670 iface->addrs, iface->addrs == 1 ? "" : "es");
671
672 for (f = 0; f < iface->addrs; f++) {
673 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
674 switch (ncprange_family(&iface->addr[f].ifa)) {
675 case AF_INET:
676 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr));
677 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
678 prompt_Printf(arg->prompt, "255.255.255.255");
679 else
680 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
681 ncprange_getip4mask(&iface->addr[f].ifa, &mask);
682 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
683 break;
684
685#ifndef NOINET6
686 case AF_INET6:
687 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr));
688 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
689 prompt_Printf(arg->prompt, " --> %s",
690 ncpaddr_ntoa(&iface->addr[f].peer));
691 ncprange_getwidth(&iface->addr[f].ifa, &width);
692 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
693 prompt_Printf(arg->prompt, " prefixlen %d", width);
694 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
695 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
696 break;
697#endif
698 }
699 prompt_Printf(arg->prompt, "\n");
700 }
701
702 return 0;
703}
704
705void
706iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
707{
708 char *wp;
709 int rtax;
710
711 wp = (char *)(ifam + 1);
712
713 for (rtax = 0; rtax < RTAX_MAX; rtax++)
714 if (ifam->ifam_addrs & (1 << rtax)) {
715 sa[rtax] = (struct sockaddr *)wp;
716 wp += ROUNDUP(sa[rtax]->sa_len);
717 } else
718 sa[rtax] = NULL;
719}