1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
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 #include <net/route.h>
35 #include <netinet/in_systm.h>
36 #include <netinet/in_var.h>
37 #include <netinet/ip.h>
38 #ifndef NOINET6
39 #include <netinet6/nd6.h>
40 #endif
41 #include <sys/un.h>
42
43 #include <errno.h>
44 #include <string.h>
45 #include <stdarg.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <sys/ioctl.h>
49 #include <sys/sysctl.h>
50 #include <termios.h>
51 #include <unistd.h>
52
53 #include "layer.h"
54 #include "defs.h"
55 #include "command.h"
56 #include "mbuf.h"
57 #include "log.h"
58 #include "id.h"
59 #include "timer.h"
60 #include "fsm.h"
61 #include "iplist.h"
62 #include "lqr.h"
63 #include "hdlc.h"
64 #include "throughput.h"
65 #include "slcompress.h"
66 #include "descriptor.h"
67 #include "ncpaddr.h"
68 #include "ipcp.h"
69 #include "filter.h"
70 #include "lcp.h"
71 #include "ccp.h"
72 #include "link.h"
73 #include "mp.h"
74 #ifndef NORADIUS
75 #include "radius.h"
76 #endif
77 #include "ipv6cp.h"
78 #include "ncp.h"
79 #include "bundle.h"
80 #include "prompt.h"
81 #include "iface.h"
82
83 #define IN6MASK128 {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
84 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
85 static const struct in6_addr in6mask128 = IN6MASK128;
86
87
88 struct iface *
iface_Create(const char * name)89 iface_Create(const char *name)
90 {
91 int mib[6], maxtries, err;
92 size_t needed, namelen;
93 char *buf, *ptr, *end;
94 struct if_msghdr *ifm;
95 struct ifa_msghdr *ifam;
96 struct sockaddr_dl *dl;
97 struct sockaddr *sa[RTAX_MAX];
98 struct iface *iface;
99 struct iface_addr *addr;
100
101 mib[0] = CTL_NET;
102 mib[1] = PF_ROUTE;
103 mib[2] = 0;
104 mib[3] = 0;
105 mib[4] = NET_RT_IFLIST;
106 mib[5] = 0;
107
108 maxtries = 20;
109 err = 0;
110 do {
111 if (maxtries-- == 0 || (err && err != ENOMEM)) {
112 fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
113 return NULL;
114 }
115
116 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
117 fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
118 strerror(errno));
119 return NULL;
120 }
121
122 if ((buf = (char *)malloc(needed)) == NULL) {
123 fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
124 return NULL;
125 }
126
127 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
128 err = errno;
129 free(buf);
130 buf = NULL;
131 }
132 } while (buf == NULL);
133
134 ptr = buf;
135 end = buf + needed;
136 iface = NULL;
137 namelen = strlen(name);
138
139 while (ptr < end && iface == NULL) {
140 ifm = (struct if_msghdr *)ptr; /* On if_msghdr */
141 if (ifm->ifm_type != RTM_IFINFO)
142 break;
143 dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */
144 if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
145 iface = (struct iface *)malloc(sizeof *iface);
146 if (iface == NULL) {
147 fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
148 free(buf);
149 return NULL;
150 }
151 iface->name = strdup(name);
152 iface->descr = NULL;
153 iface->index = ifm->ifm_index;
154 iface->flags = ifm->ifm_flags;
155 iface->mtu = 0;
156 iface->addrs = 0;
157 iface->addr = NULL;
158 }
159 ptr += ifm->ifm_msglen; /* First ifa_msghdr */
160 for (; ptr < end; ptr += ifam->ifam_msglen) {
161 ifam = (struct ifa_msghdr *)ptr; /* Next if address */
162
163 if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */
164 break;
165
166 if (iface != NULL && ifam->ifam_addrs & RTA_IFA) {
167 /* Found a configured interface ! */
168 iface_ParseHdr(ifam, sa);
169
170 if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET
171 #ifndef NOINET6
172 || sa[RTAX_IFA]->sa_family == AF_INET6
173 #endif
174 )) {
175 /* Record the address */
176
177 addr = (struct iface_addr *)
178 realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
179 if (addr == NULL)
180 break;
181 iface->addr = addr;
182
183 addr += iface->addrs;
184 iface->addrs++;
185
186 ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]);
187 if (sa[RTAX_BRD])
188 ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]);
189 else
190 ncpaddr_init(&addr->peer);
191 }
192 }
193 }
194 }
195
196 free(buf);
197
198 return iface;
199 }
200
201 static int
iface_addr_Zap(const char * name,struct iface_addr * addr,int s)202 iface_addr_Zap(const char *name, struct iface_addr *addr, int s)
203 {
204 struct ifreq ifr;
205 #ifndef NOINET6
206 struct in6_ifreq ifr6;
207 #endif
208 struct sockaddr_in *me4;
209 struct sockaddr_storage ssme;
210 int res, saved_errno;
211
212 ncprange_getsa(&addr->ifa, &ssme, NULL);
213 res = 0;
214
215 switch (ncprange_family(&addr->ifa)) {
216 case AF_INET:
217 memset(&ifr, '\0', sizeof ifr);
218 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name - 1);
219 me4 = (struct sockaddr_in *)&ifr.ifr_addr;
220 memcpy(me4, &ssme, sizeof *me4);
221
222 res = ID0ioctl(s, SIOCDIFADDR, &ifr);
223 saved_errno = errno;
224 if (log_IsKept(LogDEBUG)) {
225 char buf[NCP_ASCIIBUFFERSIZE];
226
227 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
228 log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n",
229 ifr.ifr_name, buf, ncpaddr_ntoa(&addr->peer), res);
230 }
231 break;
232
233 #ifndef NOINET6
234 case AF_INET6:
235 memset(&ifr6, '\0', sizeof ifr6);
236 strncpy(ifr6.ifr_name, name, sizeof ifr6.ifr_name - 1);
237 memcpy(&ifr6.ifr_addr, &ssme, sizeof ifr6.ifr_addr);
238
239 res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifr6);
240 saved_errno = errno;
241 break;
242 #endif
243 }
244
245 if (res == -1) {
246 char dst[NCP_ASCIIBUFFERSIZE];
247 const char *end =
248 #ifndef NOINET6
249 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
250 #endif
251 "";
252
253 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
254 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n",
255 end, ncprange_ntoa(&addr->ifa), strerror(saved_errno));
256 else {
257 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
258 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n",
259 end, ncprange_ntoa(&addr->ifa), dst, strerror(saved_errno));
260 }
261 }
262
263 return res != -1;
264 }
265
266 static int
iface_addr_Add(const char * name,struct iface_addr * addr,int s)267 iface_addr_Add(const char *name, struct iface_addr *addr, int s)
268 {
269 struct ifaliasreq ifra;
270 #ifndef NOINET6
271 struct in6_aliasreq ifra6;
272 #endif
273 struct sockaddr_in *me4, *msk4, *peer4;
274 struct sockaddr_storage ssme, sspeer, ssmsk;
275 int res, saved_errno;
276
277 ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
278 ncpaddr_getsa(&addr->peer, &sspeer);
279 res = 0;
280
281 switch (ncprange_family(&addr->ifa)) {
282 case AF_INET:
283 memset(&ifra, '\0', sizeof ifra);
284 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
285
286 me4 = (struct sockaddr_in *)&ifra.ifra_addr;
287 memcpy(me4, &ssme, sizeof *me4);
288
289 msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
290 memcpy(msk4, &ssmsk, sizeof *msk4);
291
292 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
293 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
294 peer4->sin_family = AF_INET;
295 peer4->sin_len = sizeof(*peer4);
296 peer4->sin_addr.s_addr = INADDR_NONE;
297 } else
298 memcpy(peer4, &sspeer, sizeof *peer4);
299
300 res = ID0ioctl(s, SIOCAIFADDR, &ifra);
301 saved_errno = errno;
302 if (log_IsKept(LogDEBUG)) {
303 char buf[NCP_ASCIIBUFFERSIZE];
304
305 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
306 log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n",
307 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
308 }
309 break;
310
311 #ifndef NOINET6
312 case AF_INET6:
313 memset(&ifra6, '\0', sizeof ifra6);
314 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
315
316 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
317 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
318 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
319 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
320 else if (memcmp(&((struct sockaddr_in6 *)&ssmsk)->sin6_addr, &in6mask128,
321 sizeof in6mask128) == 0)
322 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
323 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
324 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
325
326 res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6);
327 saved_errno = errno;
328 break;
329 #endif
330 }
331
332 if (res == -1) {
333 char dst[NCP_ASCIIBUFFERSIZE];
334 const char *end =
335 #ifndef NOINET6
336 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
337 #endif
338 "";
339
340 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
341 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n",
342 end, ncprange_ntoa(&addr->ifa), strerror(saved_errno));
343 else {
344 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
345 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n",
346 end, ncprange_ntoa(&addr->ifa), dst, strerror(saved_errno));
347 }
348 }
349
350 return res != -1;
351 }
352
353 int
iface_Name(struct iface * iface,const char * name)354 iface_Name(struct iface *iface, const char *name)
355 {
356 struct ifreq ifr;
357 int s;
358 char *newname;
359
360 if ((newname = strdup(name)) == NULL) {
361 log_Printf(LogWARN, "iface name: strdup failed: %s\n", strerror(errno));
362 return 0;
363 }
364
365 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
366 log_Printf(LogERROR, "iface name: socket(): %s\n", strerror(errno));
367 free(newname);
368 return 0;
369 }
370
371 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
372 ifr.ifr_data = newname;
373 if (ID0ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
374 log_Printf(LogWARN, "iface name: ioctl(SIOCSIFNAME, %s -> %s): %s\n",
375 name, newname, strerror(errno));
376 free(newname);
377 return 0;
378 }
379
380 free(iface->name);
381 iface->name = newname;
382
383 return 1;
384 }
385
386 int
iface_Descr(struct cmdargs const * arg)387 iface_Descr(struct cmdargs const *arg)
388 {
389 struct ifreq ifr;
390 struct iface *iface;
391 size_t sz, len;
392 int s, n, ifdescr_maxlen;
393 char *descr;
394
395 sz = sizeof(int);
396 if (sysctlbyname("net.ifdescr_maxlen", &ifdescr_maxlen, &sz, NULL, 0) < 0) {
397 log_Printf(LogERROR, "iface descr: sysctl failed: %s\n", strerror(errno));
398 return 1;
399 }
400
401 if (ifdescr_maxlen < 1) {
402 log_Printf(LogERROR, "iface descr: sysctl net.ifdescr_maxlen < 1\n");
403 return 1;
404 }
405
406 sz = sizeof(char) * ifdescr_maxlen;
407 if ((descr = malloc(sz)) == NULL) {
408 log_Printf(LogERROR, "iface descr: malloc failed: %s\n", strerror(errno));
409 return 1;
410 }
411
412 *descr = '\0';
413 n = arg->argn;
414 while (n < arg->argc) {
415 if (n > arg->argn && (len = strlcat(descr, " ", sz)) >= sz)
416 break;
417 if ((len = strlcat(descr, arg->argv[n], sz)) >= sz)
418 break;
419 ++n;
420 }
421 if (len >= sz) {
422 log_Printf(LogERROR, "iface descr: description exceeds maximum (%d)\n",
423 ifdescr_maxlen-1);
424 free(descr);
425 return 1;
426 }
427
428 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
429 log_Printf(LogERROR, "iface descr: socket(): %s\n", strerror(errno));
430 free(descr);
431 return 1;
432 }
433
434 iface = arg->bundle->iface;
435 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
436 ifr.ifr_buffer.length = strlen(descr) + 1;
437 ifr.ifr_buffer.buffer = descr;
438 if (ID0ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) {
439 log_Printf(LogWARN, "iface descr: ioctl(SIOCSIFDESCR, %s): %s\n",
440 descr, strerror(errno));
441 free(descr);
442 return 1;
443 }
444
445 free(iface->descr);
446 iface->descr = descr;
447
448 return 0;
449 }
450
451 void
iface_Clear(struct iface * iface,struct ncp * ncp,int family,int how)452 iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
453 {
454 int af, inskip, in6skip, s4 = -1, s6 = -1, *s;
455 unsigned n;
456
457 if (iface->addrs) {
458 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
459
460 for (n = 0; n < iface->addrs; n++) {
461 af = ncprange_family(&iface->addr[n].ifa);
462 if (family == 0 || family == af) {
463 if (!iface->addr[n].system && (how & IFACE_SYSTEM))
464 continue;
465 switch (af) {
466 case AF_INET:
467 if (inskip) {
468 inskip = 0;
469 continue;
470 }
471 s = &s4;
472 break;
473
474 #ifndef NOINET6
475 case AF_INET6:
476 if (in6skip) {
477 in6skip = 0;
478 continue;
479 }
480 s = &s6;
481 break;
482 #endif
483 default:
484 continue;
485 }
486
487 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
488 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
489 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
490 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
491 bcopy(iface->addr + n + 1, iface->addr + n,
492 (iface->addrs - n - 1) * sizeof *iface->addr);
493 iface->addrs--;
494 n--;
495 }
496 }
497 }
498
499 /* Don't bother realloc()ing - we have little to gain */
500
501 if (s4)
502 close(s4);
503 if (s6)
504 close(s6);
505 }
506 }
507
508 int
iface_Add(struct iface * iface,struct ncp * ncp,const struct ncprange * ifa,const struct ncpaddr * peer,int how)509 iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
510 const struct ncpaddr *peer, int how)
511 {
512 int af, removed, s;
513 unsigned n;
514 struct ncpaddr ncplocal;
515 struct iface_addr *addr, newaddr;
516
517 af = ncprange_family(ifa);
518 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
519 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
520 return 0;
521 }
522 ncprange_getaddr(ifa, &ncplocal);
523
524 for (n = 0; n < iface->addrs; n++) {
525 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
526 ncpaddr_equal(&iface->addr[n].peer, peer)) {
527 /* Replace this sockaddr */
528 if (!(how & IFACE_FORCE_ADD)) {
529 close(s);
530 return 0; /* errno = EEXIST; */
531 }
532
533 if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
534 ncpaddr_equal(&iface->addr[n].peer, peer)) {
535 close(s);
536 ncp_IfaceAddrAdded(ncp, iface->addr + n);
537 return 1; /* Already there */
538 }
539
540 removed = iface_addr_Zap(iface->name, iface->addr + n, s);
541 if (removed)
542 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
543 ncprange_copy(&iface->addr[n].ifa, ifa);
544 ncpaddr_copy(&iface->addr[n].peer, peer);
545 if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
546 if (removed) {
547 bcopy(iface->addr + n + 1, iface->addr + n,
548 (iface->addrs - n - 1) * sizeof *iface->addr);
549 iface->addrs--;
550 n--;
551 }
552 close(s);
553 return 0;
554 }
555 close(s);
556 ncp_IfaceAddrAdded(ncp, iface->addr + n);
557 return 1;
558 }
559 }
560
561 addr = (struct iface_addr *)realloc
562 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
563 if (addr == NULL) {
564 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
565 close(s);
566 return 0;
567 }
568 iface->addr = addr;
569
570 ncprange_copy(&newaddr.ifa, ifa);
571 ncpaddr_copy(&newaddr.peer, peer);
572 newaddr.system = !!(how & IFACE_SYSTEM);
573 if (!iface_addr_Add(iface->name, &newaddr, s)) {
574 close(s);
575 return 0;
576 }
577
578 if (how & IFACE_ADD_FIRST) {
579 /* Stuff it at the start of our list */
580 n = 0;
581 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
582 } else
583 n = iface->addrs;
584
585 iface->addrs++;
586 memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
587
588 close(s);
589 ncp_IfaceAddrAdded(ncp, iface->addr + n);
590
591 return 1;
592 }
593
594 int
iface_Delete(struct iface * iface,struct ncp * ncp,const struct ncpaddr * del)595 iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
596 {
597 struct ncpaddr found;
598 unsigned n;
599 int res, s;
600
601 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
602 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
603 return 0;
604 }
605
606 for (n = res = 0; n < iface->addrs; n++) {
607 ncprange_getaddr(&iface->addr[n].ifa, &found);
608 if (ncpaddr_equal(&found, del)) {
609 if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
610 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
611 bcopy(iface->addr + n + 1, iface->addr + n,
612 (iface->addrs - n - 1) * sizeof *iface->addr);
613 iface->addrs--;
614 res = 1;
615 }
616 break;
617 }
618 }
619
620 close(s);
621
622 return res;
623 }
624
625 #define IFACE_ADDFLAGS 1
626 #define IFACE_DELFLAGS 2
627
628 static int
iface_ChangeFlags(const char * ifname,int flags,int how)629 iface_ChangeFlags(const char *ifname, int flags, int how)
630 {
631 struct ifreq ifrq;
632 int s, new_flags;
633
634 s = ID0socket(PF_INET, SOCK_DGRAM, 0);
635 if (s < 0) {
636 log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
637 return 0;
638 }
639
640 memset(&ifrq, '\0', sizeof ifrq);
641 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
642 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
643 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
644 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
645 strerror(errno));
646 close(s);
647 return 0;
648 }
649 #ifdef __FreeBSD__
650 new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16);
651 #else
652 new_flags = ifrq.ifr_flags & 0xffff;
653 #endif
654
655 if (how == IFACE_ADDFLAGS)
656 new_flags |= flags;
657 else
658 new_flags &= ~flags;
659 ifrq.ifr_flags = new_flags & 0xffff;
660 #ifdef __FreeBSD__
661 ifrq.ifr_flagshigh = new_flags >> 16;
662 #endif
663
664 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
665 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
666 strerror(errno));
667 close(s);
668 return 0;
669 }
670 close(s);
671
672 return 1; /* Success */
673 }
674
675 int
iface_SetFlags(const char * ifname,int flags)676 iface_SetFlags(const char *ifname, int flags)
677 {
678 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
679 }
680
681 int
iface_ClearFlags(const char * ifname,int flags)682 iface_ClearFlags(const char *ifname, int flags)
683 {
684 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
685 }
686
687 void
iface_Free(struct iface * iface)688 iface_Free(struct iface *iface)
689 {
690 free(iface->name);
691 free(iface->descr);
692 free(iface->addr);
693 free(iface);
694 }
695
696 void
iface_Destroy(struct iface * iface)697 iface_Destroy(struct iface *iface)
698 {
699 struct ifreq ifr;
700 int s;
701
702 if (iface != NULL) {
703 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
704 log_Printf(LogERROR, "iface_Destroy: socket(): %s\n", strerror(errno));
705 } else {
706 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
707 if (ID0ioctl(s, SIOCIFDESTROY, (caddr_t)&ifr) < 0)
708 log_Printf(LogWARN, "iface_Destroy: ioctl(SIOCIFDESTROY, %s): %s\n",
709 iface->name, strerror(errno));
710 }
711 iface_Free(iface);
712 }
713 }
714
715 #define if_entry(x) { IFF_##x, #x }
716
717 struct {
718 int flag;
719 const char *value;
720 } if_flags[] = {
721 if_entry(UP),
722 if_entry(BROADCAST),
723 if_entry(DEBUG),
724 if_entry(LOOPBACK),
725 if_entry(POINTOPOINT),
726 if_entry(RUNNING),
727 if_entry(NOARP),
728 if_entry(PROMISC),
729 if_entry(ALLMULTI),
730 if_entry(OACTIVE),
731 if_entry(SIMPLEX),
732 if_entry(LINK0),
733 if_entry(LINK1),
734 if_entry(LINK2),
735 if_entry(MULTICAST),
736 { 0, "???" }
737 };
738
739 int
iface_Show(struct cmdargs const * arg)740 iface_Show(struct cmdargs const *arg)
741 {
742 struct ncpaddr ncpaddr;
743 struct iface *iface = arg->bundle->iface, *current;
744 unsigned f;
745 int flags;
746 #ifndef NOINET6
747 int scopeid, width;
748 #endif
749 struct in_addr mask;
750
751 current = iface_Create(iface->name);
752 flags = iface->flags = current->flags;
753 iface_Free(current);
754
755 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
756 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
757 if ((if_flags[f].flag & flags)) {
758 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
759 if_flags[f].value);
760 flags &= ~if_flags[f].flag;
761 }
762
763 #if 0
764 if (flags)
765 prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
766 flags);
767 #endif
768
769 prompt_Printf(arg->prompt, "> mtu %lu has %d address%s:\n", iface->mtu,
770 iface->addrs, iface->addrs == 1 ? "" : "es");
771
772 for (f = 0; f < iface->addrs; f++) {
773 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
774 switch (ncprange_family(&iface->addr[f].ifa)) {
775 case AF_INET:
776 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr));
777 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
778 prompt_Printf(arg->prompt, "255.255.255.255");
779 else
780 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
781 ncprange_getip4mask(&iface->addr[f].ifa, &mask);
782 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
783 break;
784
785 #ifndef NOINET6
786 case AF_INET6:
787 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr));
788 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
789 prompt_Printf(arg->prompt, " --> %s",
790 ncpaddr_ntoa(&iface->addr[f].peer));
791 ncprange_getwidth(&iface->addr[f].ifa, &width);
792 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
793 prompt_Printf(arg->prompt, " prefixlen %d", width);
794 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
795 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
796 break;
797 #endif
798 }
799 prompt_Printf(arg->prompt, "\n");
800 }
801
802 return 0;
803 }
804
805 void
iface_ParseHdr(struct ifa_msghdr * ifam,struct sockaddr * sa[RTAX_MAX])806 iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
807 {
808 char *wp;
809 int rtax;
810
811 wp = (char *)(ifam + 1);
812
813 for (rtax = 0; rtax < RTAX_MAX; rtax++)
814 if (ifam->ifam_addrs & (1 << rtax)) {
815 sa[rtax] = (struct sockaddr *)wp;
816 wp += ROUNDUP(sa[rtax]->sa_len);
817 } else
818 sa[rtax] = NULL;
819 }
820