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