1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 * $FreeBSD$
29 */
30
31 #include <sys/param.h>
32 #include <sys/socket.h>
33 #include <netinet/in.h>
34 #include <net/if.h>
35 #include <net/if_dl.h>
36 #include <net/route.h>
37 #include <netinet/in_systm.h>
38 #include <netinet/in_var.h>
39 #include <netinet/ip.h>
40 #ifndef NOINET6
41 #include <netinet6/nd6.h>
42 #endif
43 #include <sys/un.h>
44
45 #include <errno.h>
46 #include <string.h>
47 #include <stdarg.h>
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <sys/ioctl.h>
51 #include <sys/sysctl.h>
52 #include <termios.h>
53 #include <unistd.h>
54
55 #include "layer.h"
56 #include "defs.h"
57 #include "command.h"
58 #include "mbuf.h"
59 #include "log.h"
60 #include "id.h"
61 #include "timer.h"
62 #include "fsm.h"
63 #include "iplist.h"
64 #include "lqr.h"
65 #include "hdlc.h"
66 #include "throughput.h"
67 #include "slcompress.h"
68 #include "descriptor.h"
69 #include "ncpaddr.h"
70 #include "ipcp.h"
71 #include "filter.h"
72 #include "lcp.h"
73 #include "ccp.h"
74 #include "link.h"
75 #include "mp.h"
76 #ifndef NORADIUS
77 #include "radius.h"
78 #endif
79 #include "ipv6cp.h"
80 #include "ncp.h"
81 #include "bundle.h"
82 #include "prompt.h"
83 #include "iface.h"
84
85 #define IN6MASK128 {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
86 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
87 static const struct in6_addr in6mask128 = IN6MASK128;
88
89
90 struct iface *
iface_Create(const char * name)91 iface_Create(const char *name)
92 {
93 int mib[6], maxtries, err;
94 size_t needed, namelen;
95 char *buf, *ptr, *end;
96 struct if_msghdr *ifm;
97 struct ifa_msghdr *ifam;
98 struct sockaddr_dl *dl;
99 struct sockaddr *sa[RTAX_MAX];
100 struct iface *iface;
101 struct iface_addr *addr;
102
103 mib[0] = CTL_NET;
104 mib[1] = PF_ROUTE;
105 mib[2] = 0;
106 mib[3] = 0;
107 mib[4] = NET_RT_IFLIST;
108 mib[5] = 0;
109
110 maxtries = 20;
111 err = 0;
112 do {
113 if (maxtries-- == 0 || (err && err != ENOMEM)) {
114 fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
115 return NULL;
116 }
117
118 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
119 fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
120 strerror(errno));
121 return NULL;
122 }
123
124 if ((buf = (char *)malloc(needed)) == NULL) {
125 fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
126 return NULL;
127 }
128
129 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
130 err = errno;
131 free(buf);
132 buf = NULL;
133 }
134 } while (buf == NULL);
135
136 ptr = buf;
137 end = buf + needed;
138 iface = NULL;
139 namelen = strlen(name);
140
141 while (ptr < end && iface == NULL) {
142 ifm = (struct if_msghdr *)ptr; /* On if_msghdr */
143 if (ifm->ifm_type != RTM_IFINFO)
144 break;
145 dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */
146 if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
147 iface = (struct iface *)malloc(sizeof *iface);
148 if (iface == NULL) {
149 fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
150 return NULL;
151 }
152 iface->name = strdup(name);
153 iface->descr = NULL;
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, saved_errno;
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 saved_errno = errno;
238 if (log_IsKept(LogDEBUG)) {
239 char buf[NCP_ASCIIBUFFERSIZE];
240
241 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
242 log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n",
243 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
244 }
245 break;
246
247 #ifndef NOINET6
248 case AF_INET6:
249 memset(&ifra6, '\0', sizeof ifra6);
250 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
251
252 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
253 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
254 ifra6.ifra_prefixmask.sin6_family = AF_UNSPEC;
255 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
256 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
257 else
258 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
259 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
260 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
261
262 res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifra6);
263 saved_errno = errno;
264 break;
265 #endif
266 }
267
268 if (res == -1) {
269 char dst[NCP_ASCIIBUFFERSIZE];
270 const char *end =
271 #ifndef NOINET6
272 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
273 #endif
274 "";
275
276 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
277 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n",
278 end, ncprange_ntoa(&addr->ifa), strerror(saved_errno));
279 else {
280 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
281 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n",
282 end, ncprange_ntoa(&addr->ifa), dst, strerror(saved_errno));
283 }
284 }
285
286 return res != -1;
287 }
288
289 static int
iface_addr_Add(const char * name,struct iface_addr * addr,int s)290 iface_addr_Add(const char *name, struct iface_addr *addr, int s)
291 {
292 struct ifaliasreq ifra;
293 #ifndef NOINET6
294 struct in6_aliasreq ifra6;
295 #endif
296 struct sockaddr_in *me4, *msk4, *peer4;
297 struct sockaddr_storage ssme, sspeer, ssmsk;
298 int res, saved_errno;
299
300 ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
301 ncpaddr_getsa(&addr->peer, &sspeer);
302 res = 0;
303
304 switch (ncprange_family(&addr->ifa)) {
305 case AF_INET:
306 memset(&ifra, '\0', sizeof ifra);
307 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
308
309 me4 = (struct sockaddr_in *)&ifra.ifra_addr;
310 memcpy(me4, &ssme, sizeof *me4);
311
312 msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
313 memcpy(msk4, &ssmsk, sizeof *msk4);
314
315 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
316 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
317 peer4->sin_family = AF_INET;
318 peer4->sin_len = sizeof(*peer4);
319 peer4->sin_addr.s_addr = INADDR_NONE;
320 } else
321 memcpy(peer4, &sspeer, sizeof *peer4);
322
323 res = ID0ioctl(s, SIOCAIFADDR, &ifra);
324 saved_errno = errno;
325 if (log_IsKept(LogDEBUG)) {
326 char buf[NCP_ASCIIBUFFERSIZE];
327
328 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
329 log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n",
330 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
331 }
332 break;
333
334 #ifndef NOINET6
335 case AF_INET6:
336 memset(&ifra6, '\0', sizeof ifra6);
337 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
338
339 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
340 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
341 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
342 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
343 else if (memcmp(&((struct sockaddr_in6 *)&ssmsk)->sin6_addr, &in6mask128,
344 sizeof in6mask128) == 0)
345 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
346 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
347 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
348
349 res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6);
350 saved_errno = errno;
351 break;
352 #endif
353 }
354
355 if (res == -1) {
356 char dst[NCP_ASCIIBUFFERSIZE];
357 const char *end =
358 #ifndef NOINET6
359 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
360 #endif
361 "";
362
363 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
364 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n",
365 end, ncprange_ntoa(&addr->ifa), strerror(saved_errno));
366 else {
367 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
368 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n",
369 end, ncprange_ntoa(&addr->ifa), dst, strerror(saved_errno));
370 }
371 }
372
373 return res != -1;
374 }
375
376 int
iface_Name(struct iface * iface,const char * name)377 iface_Name(struct iface *iface, const char *name)
378 {
379 struct ifreq ifr;
380 int s;
381 char *newname;
382
383 if ((newname = strdup(name)) == NULL) {
384 log_Printf(LogWARN, "iface name: strdup failed: %s\n", strerror(errno));
385 return 0;
386 }
387
388 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
389 log_Printf(LogERROR, "iface name: socket(): %s\n", strerror(errno));
390 free(newname);
391 return 0;
392 }
393
394 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
395 ifr.ifr_data = newname;
396 if (ID0ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
397 log_Printf(LogWARN, "iface name: ioctl(SIOCSIFNAME, %s -> %s): %s\n",
398 name, newname, strerror(errno));
399 free(newname);
400 return 0;
401 }
402
403 free(iface->name);
404 iface->name = newname;
405
406 return 1;
407 }
408
409 int
iface_Descr(struct cmdargs const * arg)410 iface_Descr(struct cmdargs const *arg)
411 {
412 struct ifreq ifr;
413 struct iface *iface;
414 size_t sz, len;
415 int s, n, ifdescr_maxlen;
416 char *descr;
417
418 sz = sizeof(int);
419 if (sysctlbyname("net.ifdescr_maxlen", &ifdescr_maxlen, &sz, NULL, 0) < 0) {
420 log_Printf(LogERROR, "iface descr: sysctl failed: %s\n", strerror(errno));
421 return 1;
422 }
423
424 if (ifdescr_maxlen < 1) {
425 log_Printf(LogERROR, "iface descr: sysctl net.ifdescr_maxlen < 1\n");
426 return 1;
427 }
428
429 sz = sizeof(char) * ifdescr_maxlen;
430 if ((descr = malloc(sz)) == NULL) {
431 log_Printf(LogERROR, "iface descr: malloc failed: %s\n", strerror(errno));
432 return 1;
433 }
434
435 *descr = '\0';
436 n = arg->argn;
437 while (n < arg->argc) {
438 if (n > arg->argn && (len = strlcat(descr, " ", sz)) >= sz)
439 break;
440 if ((len = strlcat(descr, arg->argv[n], sz)) >= sz)
441 break;
442 ++n;
443 }
444 if (len >= sz) {
445 log_Printf(LogERROR, "iface descr: description exceeds maximum (%d)\n",
446 ifdescr_maxlen-1);
447 free(descr);
448 return 1;
449 }
450
451 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
452 log_Printf(LogERROR, "iface descr: socket(): %s\n", strerror(errno));
453 free(descr);
454 return 1;
455 }
456
457 iface = arg->bundle->iface;
458 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
459 ifr.ifr_buffer.length = strlen(descr) + 1;
460 ifr.ifr_buffer.buffer = descr;
461 if (ID0ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) {
462 log_Printf(LogWARN, "iface descr: ioctl(SIOCSIFDESCR, %s): %s\n",
463 descr, strerror(errno));
464 free(descr);
465 return 1;
466 }
467
468 free(iface->descr);
469 iface->descr = descr;
470
471 return 0;
472 }
473
474 void
iface_Clear(struct iface * iface,struct ncp * ncp,int family,int how)475 iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
476 {
477 int af, inskip, in6skip, s4 = -1, s6 = -1, *s;
478 unsigned n;
479
480 if (iface->addrs) {
481 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
482
483 for (n = 0; n < iface->addrs; n++) {
484 af = ncprange_family(&iface->addr[n].ifa);
485 if (family == 0 || family == af) {
486 if (!iface->addr[n].system && (how & IFACE_SYSTEM))
487 continue;
488 switch (af) {
489 case AF_INET:
490 if (inskip) {
491 inskip = 0;
492 continue;
493 }
494 s = &s4;
495 break;
496
497 #ifndef NOINET6
498 case AF_INET6:
499 if (in6skip) {
500 in6skip = 0;
501 continue;
502 }
503 s = &s6;
504 break;
505 #endif
506 default:
507 continue;
508 }
509
510 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
511 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
512 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
513 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
514 bcopy(iface->addr + n + 1, iface->addr + n,
515 (iface->addrs - n - 1) * sizeof *iface->addr);
516 iface->addrs--;
517 n--;
518 }
519 }
520 }
521
522 /* Don't bother realloc()ing - we have little to gain */
523
524 if (s4)
525 close(s4);
526 if (s6)
527 close(s6);
528 }
529 }
530
531 int
iface_Add(struct iface * iface,struct ncp * ncp,const struct ncprange * ifa,const struct ncpaddr * peer,int how)532 iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
533 const struct ncpaddr *peer, int how)
534 {
535 int af, removed, s;
536 unsigned n;
537 struct ncpaddr ncplocal;
538 struct iface_addr *addr, newaddr;
539
540 af = ncprange_family(ifa);
541 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
542 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
543 return 0;
544 }
545 ncprange_getaddr(ifa, &ncplocal);
546
547 for (n = 0; n < iface->addrs; n++) {
548 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
549 ncpaddr_equal(&iface->addr[n].peer, peer)) {
550 /* Replace this sockaddr */
551 if (!(how & IFACE_FORCE_ADD)) {
552 close(s);
553 return 0; /* errno = EEXIST; */
554 }
555
556 if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
557 ncpaddr_equal(&iface->addr[n].peer, peer)) {
558 close(s);
559 ncp_IfaceAddrAdded(ncp, iface->addr + n);
560 return 1; /* Already there */
561 }
562
563 removed = iface_addr_Zap(iface->name, iface->addr + n, s);
564 if (removed)
565 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
566 ncprange_copy(&iface->addr[n].ifa, ifa);
567 ncpaddr_copy(&iface->addr[n].peer, peer);
568 if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
569 if (removed) {
570 bcopy(iface->addr + n + 1, iface->addr + n,
571 (iface->addrs - n - 1) * sizeof *iface->addr);
572 iface->addrs--;
573 n--;
574 }
575 close(s);
576 return 0;
577 }
578 close(s);
579 ncp_IfaceAddrAdded(ncp, iface->addr + n);
580 return 1;
581 }
582 }
583
584 addr = (struct iface_addr *)realloc
585 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
586 if (addr == NULL) {
587 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
588 close(s);
589 return 0;
590 }
591 iface->addr = addr;
592
593 ncprange_copy(&newaddr.ifa, ifa);
594 ncpaddr_copy(&newaddr.peer, peer);
595 newaddr.system = !!(how & IFACE_SYSTEM);
596 if (!iface_addr_Add(iface->name, &newaddr, s)) {
597 close(s);
598 return 0;
599 }
600
601 if (how & IFACE_ADD_FIRST) {
602 /* Stuff it at the start of our list */
603 n = 0;
604 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
605 } else
606 n = iface->addrs;
607
608 iface->addrs++;
609 memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
610
611 close(s);
612 ncp_IfaceAddrAdded(ncp, iface->addr + n);
613
614 return 1;
615 }
616
617 int
iface_Delete(struct iface * iface,struct ncp * ncp,const struct ncpaddr * del)618 iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
619 {
620 struct ncpaddr found;
621 unsigned n;
622 int res, s;
623
624 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
625 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
626 return 0;
627 }
628
629 for (n = res = 0; n < iface->addrs; n++) {
630 ncprange_getaddr(&iface->addr[n].ifa, &found);
631 if (ncpaddr_equal(&found, del)) {
632 if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
633 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
634 bcopy(iface->addr + n + 1, iface->addr + n,
635 (iface->addrs - n - 1) * sizeof *iface->addr);
636 iface->addrs--;
637 res = 1;
638 }
639 break;
640 }
641 }
642
643 close(s);
644
645 return res;
646 }
647
648 #define IFACE_ADDFLAGS 1
649 #define IFACE_DELFLAGS 2
650
651 static int
iface_ChangeFlags(const char * ifname,int flags,int how)652 iface_ChangeFlags(const char *ifname, int flags, int how)
653 {
654 struct ifreq ifrq;
655 int s, new_flags;
656
657 s = ID0socket(PF_INET, SOCK_DGRAM, 0);
658 if (s < 0) {
659 log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
660 return 0;
661 }
662
663 memset(&ifrq, '\0', sizeof ifrq);
664 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
665 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
666 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
667 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
668 strerror(errno));
669 close(s);
670 return 0;
671 }
672 #ifdef __FreeBSD__
673 new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16);
674 #else
675 new_flags = ifrq.ifr_flags & 0xffff;
676 #endif
677
678 if (how == IFACE_ADDFLAGS)
679 new_flags |= flags;
680 else
681 new_flags &= ~flags;
682 ifrq.ifr_flags = new_flags & 0xffff;
683 #ifdef __FreeBSD__
684 ifrq.ifr_flagshigh = new_flags >> 16;
685 #endif
686
687 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
688 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
689 strerror(errno));
690 close(s);
691 return 0;
692 }
693 close(s);
694
695 return 1; /* Success */
696 }
697
698 int
iface_SetFlags(const char * ifname,int flags)699 iface_SetFlags(const char *ifname, int flags)
700 {
701 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
702 }
703
704 int
iface_ClearFlags(const char * ifname,int flags)705 iface_ClearFlags(const char *ifname, int flags)
706 {
707 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
708 }
709
710 void
iface_Free(struct iface * iface)711 iface_Free(struct iface *iface)
712 {
713 free(iface->name);
714 free(iface->descr);
715 free(iface->addr);
716 free(iface);
717 }
718
719 void
iface_Destroy(struct iface * iface)720 iface_Destroy(struct iface *iface)
721 {
722 struct ifreq ifr;
723 int s;
724
725 if (iface != NULL) {
726 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
727 log_Printf(LogERROR, "iface_Destroy: socket(): %s\n", strerror(errno));
728 } else {
729 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
730 if (ID0ioctl(s, SIOCIFDESTROY, (caddr_t)&ifr) < 0)
731 log_Printf(LogWARN, "iface_Destroy: ioctl(SIOCIFDESTROY, %s): %s\n",
732 iface->name, strerror(errno));
733 }
734 iface_Free(iface);
735 }
736 }
737
738 #define if_entry(x) { IFF_##x, #x }
739
740 struct {
741 int flag;
742 const char *value;
743 } if_flags[] = {
744 if_entry(UP),
745 if_entry(BROADCAST),
746 if_entry(DEBUG),
747 if_entry(LOOPBACK),
748 if_entry(POINTOPOINT),
749 if_entry(RUNNING),
750 if_entry(NOARP),
751 if_entry(PROMISC),
752 if_entry(ALLMULTI),
753 if_entry(OACTIVE),
754 if_entry(SIMPLEX),
755 if_entry(LINK0),
756 if_entry(LINK1),
757 if_entry(LINK2),
758 if_entry(MULTICAST),
759 { 0, "???" }
760 };
761
762 int
iface_Show(struct cmdargs const * arg)763 iface_Show(struct cmdargs const *arg)
764 {
765 struct ncpaddr ncpaddr;
766 struct iface *iface = arg->bundle->iface, *current;
767 unsigned f;
768 int flags;
769 #ifndef NOINET6
770 int scopeid, width;
771 #endif
772 struct in_addr mask;
773
774 current = iface_Create(iface->name);
775 flags = iface->flags = current->flags;
776 iface_Free(current);
777
778 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
779 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
780 if ((if_flags[f].flag & flags)) {
781 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
782 if_flags[f].value);
783 flags &= ~if_flags[f].flag;
784 }
785
786 #if 0
787 if (flags)
788 prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
789 flags);
790 #endif
791
792 prompt_Printf(arg->prompt, "> mtu %lu has %d address%s:\n", iface->mtu,
793 iface->addrs, iface->addrs == 1 ? "" : "es");
794
795 for (f = 0; f < iface->addrs; f++) {
796 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
797 switch (ncprange_family(&iface->addr[f].ifa)) {
798 case AF_INET:
799 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr));
800 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
801 prompt_Printf(arg->prompt, "255.255.255.255");
802 else
803 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
804 ncprange_getip4mask(&iface->addr[f].ifa, &mask);
805 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
806 break;
807
808 #ifndef NOINET6
809 case AF_INET6:
810 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr));
811 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
812 prompt_Printf(arg->prompt, " --> %s",
813 ncpaddr_ntoa(&iface->addr[f].peer));
814 ncprange_getwidth(&iface->addr[f].ifa, &width);
815 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
816 prompt_Printf(arg->prompt, " prefixlen %d", width);
817 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
818 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
819 break;
820 #endif
821 }
822 prompt_Printf(arg->prompt, "\n");
823 }
824
825 return 0;
826 }
827
828 void
iface_ParseHdr(struct ifa_msghdr * ifam,struct sockaddr * sa[RTAX_MAX])829 iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
830 {
831 char *wp;
832 int rtax;
833
834 wp = (char *)(ifam + 1);
835
836 for (rtax = 0; rtax < RTAX_MAX; rtax++)
837 if (ifam->ifam_addrs & (1 << rtax)) {
838 sa[rtax] = (struct sockaddr *)wp;
839 wp += ROUNDUP(sa[rtax]->sa_len);
840 } else
841 sa[rtax] = NULL;
842 }
843