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 1.38.24.1 2010/12/21 17:10:29 kensmith Exp $
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 }}}
88 static const struct in6_addr in6mask128 = IN6MASK128;
89
90
91 struct iface *
iface_Create(const char * name)92 iface_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
202 static int
iface_addr_Zap(const char * name,struct iface_addr * addr,int s)203 iface_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
287 static int
iface_addr_Add(const char * name,struct iface_addr * addr,int s)288 iface_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
373 void
iface_Clear(struct iface * iface,struct ncp * ncp,int family,int how)374 iface_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
431 int
iface_Add(struct iface * iface,struct ncp * ncp,const struct ncprange * ifa,const struct ncpaddr * peer,int how)432 iface_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
516 int
iface_Delete(struct iface * iface,struct ncp * ncp,const struct ncpaddr * del)517 iface_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
550 static int
iface_ChangeFlags(const char * ifname,int flags,int how)551 iface_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
597 int
iface_SetFlags(const char * ifname,int flags)598 iface_SetFlags(const char *ifname, int flags)
599 {
600 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
601 }
602
603 int
iface_ClearFlags(const char * ifname,int flags)604 iface_ClearFlags(const char *ifname, int flags)
605 {
606 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
607 }
608
609 void
iface_Destroy(struct iface * iface)610 iface_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
627 struct {
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
649 int
iface_Show(struct cmdargs const * arg)650 iface_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
715 void
iface_ParseHdr(struct ifa_msghdr * ifam,struct sockaddr * sa[RTAX_MAX])716 iface_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