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: stable/10/usr.sbin/ppp/iface.c 330805 2018-03-12 17:37:38Z eugen $
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->descr = NULL;
155 iface->index = ifm->ifm_index;
156 iface->flags = ifm->ifm_flags;
157 iface->mtu = 0;
158 iface->addrs = 0;
159 iface->addr = NULL;
160 }
161 ptr += ifm->ifm_msglen; /* First ifa_msghdr */
162 for (; ptr < end; ptr += ifam->ifam_msglen) {
163 ifam = (struct ifa_msghdr *)ptr; /* Next if address */
164
165 if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */
166 break;
167
168 if (iface != NULL && ifam->ifam_addrs & RTA_IFA) {
169 /* Found a configured interface ! */
170 iface_ParseHdr(ifam, sa);
171
172 if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET
173 #ifndef NOINET6
174 || sa[RTAX_IFA]->sa_family == AF_INET6
175 #endif
176 )) {
177 /* Record the address */
178
179 addr = (struct iface_addr *)
180 realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
181 if (addr == NULL)
182 break;
183 iface->addr = addr;
184
185 addr += iface->addrs;
186 iface->addrs++;
187
188 ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]);
189 if (sa[RTAX_BRD])
190 ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]);
191 else
192 ncpaddr_init(&addr->peer);
193 }
194 }
195 }
196 }
197
198 free(buf);
199
200 return iface;
201 }
202
203 static int
iface_addr_Zap(const char * name,struct iface_addr * addr,int s)204 iface_addr_Zap(const char *name, struct iface_addr *addr, int s)
205 {
206 struct ifaliasreq ifra;
207 #ifndef NOINET6
208 struct in6_aliasreq ifra6;
209 #endif
210 struct sockaddr_in *me4, *msk4, *peer4;
211 struct sockaddr_storage ssme, sspeer, ssmsk;
212 int res, saved_errno;
213
214 ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
215 ncpaddr_getsa(&addr->peer, &sspeer);
216 res = 0;
217
218 switch (ncprange_family(&addr->ifa)) {
219 case AF_INET:
220 memset(&ifra, '\0', sizeof ifra);
221 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
222
223 me4 = (struct sockaddr_in *)&ifra.ifra_addr;
224 memcpy(me4, &ssme, sizeof *me4);
225
226 msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
227 memcpy(msk4, &ssmsk, sizeof *msk4);
228
229 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
230 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
231 peer4->sin_family = AF_INET;
232 peer4->sin_len = sizeof(*peer4);
233 peer4->sin_addr.s_addr = INADDR_NONE;
234 } else
235 memcpy(peer4, &sspeer, sizeof *peer4);
236
237 res = ID0ioctl(s, SIOCDIFADDR, &ifra);
238 saved_errno = errno;
239 if (log_IsKept(LogDEBUG)) {
240 char buf[NCP_ASCIIBUFFERSIZE];
241
242 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
243 log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n",
244 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
245 }
246 break;
247
248 #ifndef NOINET6
249 case AF_INET6:
250 memset(&ifra6, '\0', sizeof ifra6);
251 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
252
253 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
254 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
255 ifra6.ifra_prefixmask.sin6_family = AF_UNSPEC;
256 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
257 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
258 else
259 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
260 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
261 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
262
263 res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifra6);
264 saved_errno = errno;
265 break;
266 #endif
267 }
268
269 if (res == -1) {
270 char dst[NCP_ASCIIBUFFERSIZE];
271 const char *end =
272 #ifndef NOINET6
273 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
274 #endif
275 "";
276
277 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
278 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n",
279 end, ncprange_ntoa(&addr->ifa), strerror(saved_errno));
280 else {
281 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
282 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n",
283 end, ncprange_ntoa(&addr->ifa), dst, strerror(saved_errno));
284 }
285 }
286
287 return res != -1;
288 }
289
290 static int
iface_addr_Add(const char * name,struct iface_addr * addr,int s)291 iface_addr_Add(const char *name, struct iface_addr *addr, int s)
292 {
293 struct ifaliasreq ifra;
294 #ifndef NOINET6
295 struct in6_aliasreq ifra6;
296 #endif
297 struct sockaddr_in *me4, *msk4, *peer4;
298 struct sockaddr_storage ssme, sspeer, ssmsk;
299 int res, saved_errno;
300
301 ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
302 ncpaddr_getsa(&addr->peer, &sspeer);
303 res = 0;
304
305 switch (ncprange_family(&addr->ifa)) {
306 case AF_INET:
307 memset(&ifra, '\0', sizeof ifra);
308 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
309
310 me4 = (struct sockaddr_in *)&ifra.ifra_addr;
311 memcpy(me4, &ssme, sizeof *me4);
312
313 msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
314 memcpy(msk4, &ssmsk, sizeof *msk4);
315
316 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
317 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
318 peer4->sin_family = AF_INET;
319 peer4->sin_len = sizeof(*peer4);
320 peer4->sin_addr.s_addr = INADDR_NONE;
321 } else
322 memcpy(peer4, &sspeer, sizeof *peer4);
323
324 res = ID0ioctl(s, SIOCAIFADDR, &ifra);
325 saved_errno = errno;
326 if (log_IsKept(LogDEBUG)) {
327 char buf[NCP_ASCIIBUFFERSIZE];
328
329 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
330 log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n",
331 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
332 }
333 break;
334
335 #ifndef NOINET6
336 case AF_INET6:
337 memset(&ifra6, '\0', sizeof ifra6);
338 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
339
340 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
341 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
342 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
343 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
344 else if (memcmp(&((struct sockaddr_in6 *)&ssmsk)->sin6_addr, &in6mask128,
345 sizeof in6mask128) == 0)
346 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
347 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
348 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
349
350 res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6);
351 saved_errno = errno;
352 break;
353 #endif
354 }
355
356 if (res == -1) {
357 char dst[NCP_ASCIIBUFFERSIZE];
358 const char *end =
359 #ifndef NOINET6
360 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
361 #endif
362 "";
363
364 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
365 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n",
366 end, ncprange_ntoa(&addr->ifa), strerror(saved_errno));
367 else {
368 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
369 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n",
370 end, ncprange_ntoa(&addr->ifa), dst, strerror(saved_errno));
371 }
372 }
373
374 return res != -1;
375 }
376
377 int
iface_Name(struct iface * iface,const char * name)378 iface_Name(struct iface *iface, const char *name)
379 {
380 struct ifreq ifr;
381 int s;
382 char *newname;
383
384 if ((newname = strdup(name)) == NULL) {
385 log_Printf(LogWARN, "iface name: strdup failed: %s\n", strerror(errno));
386 return 0;
387 }
388
389 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
390 log_Printf(LogERROR, "iface name: socket(): %s\n", strerror(errno));
391 free(newname);
392 return 0;
393 }
394
395 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
396 ifr.ifr_data = newname;
397 if (ID0ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
398 log_Printf(LogWARN, "iface name: ioctl(SIOCSIFNAME, %s -> %s): %s\n",
399 name, newname, strerror(errno));
400 free(newname);
401 return 0;
402 }
403
404 free(iface->name);
405 iface->name = newname;
406
407 return 1;
408 }
409
410 int
iface_Descr(struct cmdargs const * arg)411 iface_Descr(struct cmdargs const *arg)
412 {
413 struct ifreq ifr;
414 struct iface *iface;
415 size_t sz, len;
416 int s, n, ifdescr_maxlen;
417 char *descr;
418
419 sz = sizeof(int);
420 if (sysctlbyname("net.ifdescr_maxlen", &ifdescr_maxlen, &sz, NULL, 0) < 0) {
421 log_Printf(LogERROR, "iface descr: sysctl failed: %s\n", strerror(errno));
422 return 1;
423 }
424
425 if (ifdescr_maxlen < 1) {
426 log_Printf(LogERROR, "iface descr: sysctl net.ifdescr_maxlen < 1\n");
427 return 1;
428 }
429
430 sz = sizeof(char) * ifdescr_maxlen;
431 if ((descr = malloc(sz)) == NULL) {
432 log_Printf(LogERROR, "iface descr: malloc failed: %s\n", strerror(errno));
433 return 1;
434 }
435
436 *descr = '\0';
437 n = arg->argn;
438 while (n < arg->argc) {
439 if (n > arg->argn && (len = strlcat(descr, " ", sz)) >= sz)
440 break;
441 if ((len = strlcat(descr, arg->argv[n], sz)) >= sz)
442 break;
443 ++n;
444 }
445 if (len >= sz) {
446 log_Printf(LogERROR, "iface descr: description exceeds maximum (%d)\n",
447 ifdescr_maxlen-1);
448 free(descr);
449 return 1;
450 }
451
452 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
453 log_Printf(LogERROR, "iface descr: socket(): %s\n", strerror(errno));
454 free(descr);
455 return 1;
456 }
457
458 iface = arg->bundle->iface;
459 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
460 ifr.ifr_buffer.length = strlen(descr) + 1;
461 ifr.ifr_buffer.buffer = descr;
462 if (ID0ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) {
463 log_Printf(LogWARN, "iface descr: ioctl(SIOCSIFDESCR, %s): %s\n",
464 descr, strerror(errno));
465 free(descr);
466 return 1;
467 }
468
469 free(iface->descr);
470 iface->descr = descr;
471
472 return 0;
473 }
474
475 void
iface_Clear(struct iface * iface,struct ncp * ncp,int family,int how)476 iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
477 {
478 int af, inskip, in6skip, s4 = -1, s6 = -1, *s;
479 unsigned n;
480
481 if (iface->addrs) {
482 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
483
484 for (n = 0; n < iface->addrs; n++) {
485 af = ncprange_family(&iface->addr[n].ifa);
486 if (family == 0 || family == af) {
487 if (!iface->addr[n].system && (how & IFACE_SYSTEM))
488 continue;
489 switch (af) {
490 case AF_INET:
491 if (inskip) {
492 inskip = 0;
493 continue;
494 }
495 s = &s4;
496 break;
497
498 #ifndef NOINET6
499 case AF_INET6:
500 if (in6skip) {
501 in6skip = 0;
502 continue;
503 }
504 s = &s6;
505 break;
506 #endif
507 default:
508 continue;
509 }
510
511 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
512 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
513 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
514 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
515 bcopy(iface->addr + n + 1, iface->addr + n,
516 (iface->addrs - n - 1) * sizeof *iface->addr);
517 iface->addrs--;
518 n--;
519 }
520 }
521 }
522
523 /* Don't bother realloc()ing - we have little to gain */
524
525 if (s4)
526 close(s4);
527 if (s6)
528 close(s6);
529 }
530 }
531
532 int
iface_Add(struct iface * iface,struct ncp * ncp,const struct ncprange * ifa,const struct ncpaddr * peer,int how)533 iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
534 const struct ncpaddr *peer, int how)
535 {
536 int af, removed, s;
537 unsigned n;
538 struct ncpaddr ncplocal;
539 struct iface_addr *addr, newaddr;
540
541 af = ncprange_family(ifa);
542 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
543 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
544 return 0;
545 }
546 ncprange_getaddr(ifa, &ncplocal);
547
548 for (n = 0; n < iface->addrs; n++) {
549 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
550 ncpaddr_equal(&iface->addr[n].peer, peer)) {
551 /* Replace this sockaddr */
552 if (!(how & IFACE_FORCE_ADD)) {
553 close(s);
554 return 0; /* errno = EEXIST; */
555 }
556
557 if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
558 ncpaddr_equal(&iface->addr[n].peer, peer)) {
559 close(s);
560 ncp_IfaceAddrAdded(ncp, iface->addr + n);
561 return 1; /* Already there */
562 }
563
564 removed = iface_addr_Zap(iface->name, iface->addr + n, s);
565 if (removed)
566 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
567 ncprange_copy(&iface->addr[n].ifa, ifa);
568 ncpaddr_copy(&iface->addr[n].peer, peer);
569 if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
570 if (removed) {
571 bcopy(iface->addr + n + 1, iface->addr + n,
572 (iface->addrs - n - 1) * sizeof *iface->addr);
573 iface->addrs--;
574 n--;
575 }
576 close(s);
577 return 0;
578 }
579 close(s);
580 ncp_IfaceAddrAdded(ncp, iface->addr + n);
581 return 1;
582 }
583 }
584
585 addr = (struct iface_addr *)realloc
586 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
587 if (addr == NULL) {
588 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
589 close(s);
590 return 0;
591 }
592 iface->addr = addr;
593
594 ncprange_copy(&newaddr.ifa, ifa);
595 ncpaddr_copy(&newaddr.peer, peer);
596 newaddr.system = !!(how & IFACE_SYSTEM);
597 if (!iface_addr_Add(iface->name, &newaddr, s)) {
598 close(s);
599 return 0;
600 }
601
602 if (how & IFACE_ADD_FIRST) {
603 /* Stuff it at the start of our list */
604 n = 0;
605 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
606 } else
607 n = iface->addrs;
608
609 iface->addrs++;
610 memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
611
612 close(s);
613 ncp_IfaceAddrAdded(ncp, iface->addr + n);
614
615 return 1;
616 }
617
618 int
iface_Delete(struct iface * iface,struct ncp * ncp,const struct ncpaddr * del)619 iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
620 {
621 struct ncpaddr found;
622 unsigned n;
623 int res, s;
624
625 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
626 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
627 return 0;
628 }
629
630 for (n = res = 0; n < iface->addrs; n++) {
631 ncprange_getaddr(&iface->addr[n].ifa, &found);
632 if (ncpaddr_equal(&found, del)) {
633 if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
634 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
635 bcopy(iface->addr + n + 1, iface->addr + n,
636 (iface->addrs - n - 1) * sizeof *iface->addr);
637 iface->addrs--;
638 res = 1;
639 }
640 break;
641 }
642 }
643
644 close(s);
645
646 return res;
647 }
648
649 #define IFACE_ADDFLAGS 1
650 #define IFACE_DELFLAGS 2
651
652 static int
iface_ChangeFlags(const char * ifname,int flags,int how)653 iface_ChangeFlags(const char *ifname, int flags, int how)
654 {
655 struct ifreq ifrq;
656 int s, new_flags;
657
658 s = ID0socket(PF_INET, SOCK_DGRAM, 0);
659 if (s < 0) {
660 log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
661 return 0;
662 }
663
664 memset(&ifrq, '\0', sizeof ifrq);
665 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
666 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
667 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
668 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
669 strerror(errno));
670 close(s);
671 return 0;
672 }
673 #ifdef __FreeBSD__
674 new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16);
675 #else
676 new_flags = ifrq.ifr_flags & 0xffff;
677 #endif
678
679 if (how == IFACE_ADDFLAGS)
680 new_flags |= flags;
681 else
682 new_flags &= ~flags;
683 ifrq.ifr_flags = new_flags & 0xffff;
684 #ifdef __FreeBSD__
685 ifrq.ifr_flagshigh = new_flags >> 16;
686 #endif
687
688 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
689 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
690 strerror(errno));
691 close(s);
692 return 0;
693 }
694 close(s);
695
696 return 1; /* Success */
697 }
698
699 int
iface_SetFlags(const char * ifname,int flags)700 iface_SetFlags(const char *ifname, int flags)
701 {
702 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
703 }
704
705 int
iface_ClearFlags(const char * ifname,int flags)706 iface_ClearFlags(const char *ifname, int flags)
707 {
708 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
709 }
710
711 void
iface_Free(struct iface * iface)712 iface_Free(struct iface *iface)
713 {
714 free(iface->name);
715 free(iface->descr);
716 free(iface->addr);
717 free(iface);
718 }
719
720 void
iface_Destroy(struct iface * iface)721 iface_Destroy(struct iface *iface)
722 {
723 struct ifreq ifr;
724 int s;
725
726 if (iface != NULL) {
727 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
728 log_Printf(LogERROR, "iface_Destroy: socket(): %s\n", strerror(errno));
729 } else {
730 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
731 if (ID0ioctl(s, SIOCIFDESTROY, (caddr_t)&ifr) < 0)
732 log_Printf(LogWARN, "iface_Destroy: ioctl(SIOCIFDESTROY, %s): %s\n",
733 iface->name, strerror(errno));
734 }
735 iface_Free(iface);
736 }
737 }
738
739 #define if_entry(x) { IFF_##x, #x }
740
741 struct {
742 int flag;
743 const char *value;
744 } if_flags[] = {
745 if_entry(UP),
746 if_entry(BROADCAST),
747 if_entry(DEBUG),
748 if_entry(LOOPBACK),
749 if_entry(POINTOPOINT),
750 if_entry(RUNNING),
751 if_entry(NOARP),
752 if_entry(PROMISC),
753 if_entry(ALLMULTI),
754 if_entry(OACTIVE),
755 if_entry(SIMPLEX),
756 if_entry(LINK0),
757 if_entry(LINK1),
758 if_entry(LINK2),
759 if_entry(MULTICAST),
760 { 0, "???" }
761 };
762
763 int
iface_Show(struct cmdargs const * arg)764 iface_Show(struct cmdargs const *arg)
765 {
766 struct ncpaddr ncpaddr;
767 struct iface *iface = arg->bundle->iface, *current;
768 unsigned f;
769 int flags;
770 #ifndef NOINET6
771 int scopeid, width;
772 #endif
773 struct in_addr mask;
774
775 current = iface_Create(iface->name);
776 flags = iface->flags = current->flags;
777 iface_Free(current);
778
779 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
780 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
781 if ((if_flags[f].flag & flags)) {
782 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
783 if_flags[f].value);
784 flags &= ~if_flags[f].flag;
785 }
786
787 #if 0
788 if (flags)
789 prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
790 flags);
791 #endif
792
793 prompt_Printf(arg->prompt, "> mtu %lu has %d address%s:\n", iface->mtu,
794 iface->addrs, iface->addrs == 1 ? "" : "es");
795
796 for (f = 0; f < iface->addrs; f++) {
797 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
798 switch (ncprange_family(&iface->addr[f].ifa)) {
799 case AF_INET:
800 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr));
801 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
802 prompt_Printf(arg->prompt, "255.255.255.255");
803 else
804 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
805 ncprange_getip4mask(&iface->addr[f].ifa, &mask);
806 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
807 break;
808
809 #ifndef NOINET6
810 case AF_INET6:
811 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr));
812 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
813 prompt_Printf(arg->prompt, " --> %s",
814 ncpaddr_ntoa(&iface->addr[f].peer));
815 ncprange_getwidth(&iface->addr[f].ifa, &width);
816 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
817 prompt_Printf(arg->prompt, " prefixlen %d", width);
818 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
819 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
820 break;
821 #endif
822 }
823 prompt_Printf(arg->prompt, "\n");
824 }
825
826 return 0;
827 }
828
829 void
iface_ParseHdr(struct ifa_msghdr * ifam,struct sockaddr * sa[RTAX_MAX])830 iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
831 {
832 char *wp;
833 int rtax;
834
835 wp = (char *)(ifam + 1);
836
837 for (rtax = 0; rtax < RTAX_MAX; rtax++)
838 if (ifam->ifam_addrs & (1 << rtax)) {
839 sa[rtax] = (struct sockaddr *)wp;
840 wp += ROUNDUP(sa[rtax]->sa_len);
841 } else
842 sa[rtax] = NULL;
843 }
844