1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. 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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 static const char rcsid[] =
32 "$FreeBSD: stable/9/sbin/ifconfig/af_inet6.c 289987 2015-10-26 03:48:14Z ngie $";
33 #endif /* not lint */
34
35 #include <sys/param.h>
36 #include <sys/ioctl.h>
37 #include <sys/socket.h>
38 #include <net/if.h>
39
40 #include <err.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45 #include <ifaddrs.h>
46
47 #include <arpa/inet.h>
48
49 #include <netinet/in.h>
50 #include <net/if_var.h> /* for struct ifaddr */
51 #include <netinet/in_var.h>
52 #include <arpa/inet.h>
53 #include <netdb.h>
54
55 #include <netinet6/nd6.h> /* Define ND6_INFINITE_LIFETIME */
56
57 #include "ifconfig.h"
58
59 static struct in6_ifreq in6_ridreq;
60 static struct in6_aliasreq in6_addreq =
61 { .ifra_flags = 0,
62 .ifra_lifetime = { 0, 0, ND6_INFINITE_LIFETIME, ND6_INFINITE_LIFETIME } };
63 static int ip6lifetime;
64
65 static void in6_fillscopeid(struct sockaddr_in6 *sin6);
66 static int prefix(void *, int);
67 static char *sec2str(time_t);
68 static int explicit_prefix = 0;
69
70 extern void setnd6flags(const char *, int, int, const struct afswtch *);
71 extern void setnd6defif(const char *, int, int, const struct afswtch *);
72 extern void nd6_status(int);
73
74 static char addr_buf[MAXHOSTNAMELEN *2 + 1]; /*for getnameinfo()*/
75
76 static void
setifprefixlen(const char * addr,int dummy __unused,int s,const struct afswtch * afp)77 setifprefixlen(const char *addr, int dummy __unused, int s,
78 const struct afswtch *afp)
79 {
80 if (afp->af_getprefix != NULL)
81 afp->af_getprefix(addr, MASK);
82 explicit_prefix = 1;
83 }
84
85 static void
setip6flags(const char * dummyaddr __unused,int flag,int dummysoc __unused,const struct afswtch * afp)86 setip6flags(const char *dummyaddr __unused, int flag, int dummysoc __unused,
87 const struct afswtch *afp)
88 {
89 if (afp->af_af != AF_INET6)
90 err(1, "address flags can be set only for inet6 addresses");
91
92 if (flag < 0)
93 in6_addreq.ifra_flags &= ~(-flag);
94 else
95 in6_addreq.ifra_flags |= flag;
96 }
97
98 static void
setip6lifetime(const char * cmd,const char * val,int s,const struct afswtch * afp)99 setip6lifetime(const char *cmd, const char *val, int s,
100 const struct afswtch *afp)
101 {
102 time_t newval, t;
103 char *ep;
104
105 t = time(NULL);
106 newval = (time_t)strtoul(val, &ep, 0);
107 if (val == ep)
108 errx(1, "invalid %s", cmd);
109 if (afp->af_af != AF_INET6)
110 errx(1, "%s not allowed for the AF", cmd);
111 if (strcmp(cmd, "vltime") == 0) {
112 in6_addreq.ifra_lifetime.ia6t_expire = t + newval;
113 in6_addreq.ifra_lifetime.ia6t_vltime = newval;
114 } else if (strcmp(cmd, "pltime") == 0) {
115 in6_addreq.ifra_lifetime.ia6t_preferred = t + newval;
116 in6_addreq.ifra_lifetime.ia6t_pltime = newval;
117 }
118 }
119
120 static void
setip6pltime(const char * seconds,int dummy __unused,int s,const struct afswtch * afp)121 setip6pltime(const char *seconds, int dummy __unused, int s,
122 const struct afswtch *afp)
123 {
124 setip6lifetime("pltime", seconds, s, afp);
125 }
126
127 static void
setip6vltime(const char * seconds,int dummy __unused,int s,const struct afswtch * afp)128 setip6vltime(const char *seconds, int dummy __unused, int s,
129 const struct afswtch *afp)
130 {
131 setip6lifetime("vltime", seconds, s, afp);
132 }
133
134 static void
setip6eui64(const char * cmd,int dummy __unused,int s,const struct afswtch * afp)135 setip6eui64(const char *cmd, int dummy __unused, int s,
136 const struct afswtch *afp)
137 {
138 struct ifaddrs *ifap, *ifa;
139 const struct sockaddr_in6 *sin6 = NULL;
140 const struct in6_addr *lladdr = NULL;
141 struct in6_addr *in6;
142
143 if (afp->af_af != AF_INET6)
144 errx(EXIT_FAILURE, "%s not allowed for the AF", cmd);
145 in6 = (struct in6_addr *)&in6_addreq.ifra_addr.sin6_addr;
146 if (memcmp(&in6addr_any.s6_addr[8], &in6->s6_addr[8], 8) != 0)
147 errx(EXIT_FAILURE, "interface index is already filled");
148 if (getifaddrs(&ifap) != 0)
149 err(EXIT_FAILURE, "getifaddrs");
150 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
151 if (ifa->ifa_addr->sa_family == AF_INET6 &&
152 strcmp(ifa->ifa_name, name) == 0) {
153 sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr;
154 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
155 lladdr = &sin6->sin6_addr;
156 break;
157 }
158 }
159 }
160 if (!lladdr)
161 errx(EXIT_FAILURE, "could not determine link local address");
162
163 memcpy(&in6->s6_addr[8], &lladdr->s6_addr[8], 8);
164
165 freeifaddrs(ifap);
166 }
167
168 static void
in6_fillscopeid(struct sockaddr_in6 * sin6)169 in6_fillscopeid(struct sockaddr_in6 *sin6)
170 {
171 #if defined(__KAME__) && defined(KAME_SCOPEID)
172 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
173 sin6->sin6_scope_id =
174 ntohs(*(u_int16_t *)&sin6->sin6_addr.s6_addr[2]);
175 sin6->sin6_addr.s6_addr[2] = sin6->sin6_addr.s6_addr[3] = 0;
176 }
177 #endif
178 }
179
180 static void
in6_status(int s __unused,const struct ifaddrs * ifa)181 in6_status(int s __unused, const struct ifaddrs *ifa)
182 {
183 struct sockaddr_in6 *sin, null_sin;
184 struct in6_ifreq ifr6;
185 int s6;
186 u_int32_t flags6;
187 struct in6_addrlifetime lifetime;
188 time_t t = time(NULL);
189 int error;
190 u_int32_t scopeid;
191
192 memset(&null_sin, 0, sizeof(null_sin));
193
194 sin = (struct sockaddr_in6 *)ifa->ifa_addr;
195 if (sin == NULL)
196 return;
197
198 strncpy(ifr6.ifr_name, ifr.ifr_name, sizeof(ifr.ifr_name));
199 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
200 warn("socket(AF_INET6,SOCK_DGRAM)");
201 return;
202 }
203 ifr6.ifr_addr = *sin;
204 if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
205 warn("ioctl(SIOCGIFAFLAG_IN6)");
206 close(s6);
207 return;
208 }
209 flags6 = ifr6.ifr_ifru.ifru_flags6;
210 memset(&lifetime, 0, sizeof(lifetime));
211 ifr6.ifr_addr = *sin;
212 if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) {
213 warn("ioctl(SIOCGIFALIFETIME_IN6)");
214 close(s6);
215 return;
216 }
217 lifetime = ifr6.ifr_ifru.ifru_lifetime;
218 close(s6);
219
220 /* XXX: embedded link local addr check */
221 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) &&
222 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) {
223 u_short index;
224
225 index = *(u_short *)&sin->sin6_addr.s6_addr[2];
226 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0;
227 if (sin->sin6_scope_id == 0)
228 sin->sin6_scope_id = ntohs(index);
229 }
230 scopeid = sin->sin6_scope_id;
231
232 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf,
233 sizeof(addr_buf), NULL, 0, NI_NUMERICHOST);
234 if (error != 0)
235 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf,
236 sizeof(addr_buf));
237 printf("\tinet6 %s ", addr_buf);
238
239 if (ifa->ifa_flags & IFF_POINTOPOINT) {
240 sin = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
241 /*
242 * some of the interfaces do not have valid destination
243 * address.
244 */
245 if (sin != NULL && sin->sin6_family == AF_INET6) {
246 int error;
247
248 /* XXX: embedded link local addr check */
249 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) &&
250 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) {
251 u_short index;
252
253 index = *(u_short *)&sin->sin6_addr.s6_addr[2];
254 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0;
255 if (sin->sin6_scope_id == 0)
256 sin->sin6_scope_id = ntohs(index);
257 }
258
259 error = getnameinfo((struct sockaddr *)sin,
260 sin->sin6_len, addr_buf,
261 sizeof(addr_buf), NULL, 0,
262 NI_NUMERICHOST);
263 if (error != 0)
264 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf,
265 sizeof(addr_buf));
266 printf("--> %s ", addr_buf);
267 }
268 }
269
270 sin = (struct sockaddr_in6 *)ifa->ifa_netmask;
271 if (sin == NULL)
272 sin = &null_sin;
273 printf("prefixlen %d ", prefix(&sin->sin6_addr,
274 sizeof(struct in6_addr)));
275
276 if ((flags6 & IN6_IFF_ANYCAST) != 0)
277 printf("anycast ");
278 if ((flags6 & IN6_IFF_TENTATIVE) != 0)
279 printf("tentative ");
280 if ((flags6 & IN6_IFF_DUPLICATED) != 0)
281 printf("duplicated ");
282 if ((flags6 & IN6_IFF_DETACHED) != 0)
283 printf("detached ");
284 if ((flags6 & IN6_IFF_DEPRECATED) != 0)
285 printf("deprecated ");
286 if ((flags6 & IN6_IFF_AUTOCONF) != 0)
287 printf("autoconf ");
288 if ((flags6 & IN6_IFF_TEMPORARY) != 0)
289 printf("temporary ");
290 if ((flags6 & IN6_IFF_PREFER_SOURCE) != 0)
291 printf("prefer_source ");
292
293 if (scopeid)
294 printf("scopeid 0x%x ", scopeid);
295
296 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) {
297 printf("pltime ");
298 if (lifetime.ia6t_preferred) {
299 printf("%s ", lifetime.ia6t_preferred < t
300 ? "0" : sec2str(lifetime.ia6t_preferred - t));
301 } else
302 printf("infty ");
303
304 printf("vltime ");
305 if (lifetime.ia6t_expire) {
306 printf("%s ", lifetime.ia6t_expire < t
307 ? "0" : sec2str(lifetime.ia6t_expire - t));
308 } else
309 printf("infty ");
310 }
311
312 putchar('\n');
313 }
314
315 #define SIN6(x) ((struct sockaddr_in6 *) &(x))
316 static struct sockaddr_in6 *sin6tab[] = {
317 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr),
318 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr)
319 };
320
321 static void
in6_getprefix(const char * plen,int which)322 in6_getprefix(const char *plen, int which)
323 {
324 struct sockaddr_in6 *sin = sin6tab[which];
325 u_char *cp;
326 int len = atoi(plen);
327
328 if ((len < 0) || (len > 128))
329 errx(1, "%s: bad value", plen);
330 sin->sin6_len = sizeof(*sin);
331 if (which != MASK)
332 sin->sin6_family = AF_INET6;
333 if ((len == 0) || (len == 128)) {
334 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr));
335 return;
336 }
337 memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr));
338 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8)
339 *cp++ = 0xff;
340 *cp = 0xff << (8 - len);
341 }
342
343 static void
in6_getaddr(const char * s,int which)344 in6_getaddr(const char *s, int which)
345 {
346 struct sockaddr_in6 *sin = sin6tab[which];
347 struct addrinfo hints, *res;
348 int error = -1;
349
350 newaddr &= 1;
351
352 sin->sin6_len = sizeof(*sin);
353 if (which != MASK)
354 sin->sin6_family = AF_INET6;
355
356 if (which == ADDR) {
357 char *p = NULL;
358 if((p = strrchr(s, '/')) != NULL) {
359 *p = '\0';
360 in6_getprefix(p + 1, MASK);
361 explicit_prefix = 1;
362 }
363 }
364
365 if (sin->sin6_family == AF_INET6) {
366 bzero(&hints, sizeof(struct addrinfo));
367 hints.ai_family = AF_INET6;
368 error = getaddrinfo(s, NULL, &hints, &res);
369 }
370 if (error != 0) {
371 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1)
372 errx(1, "%s: bad value", s);
373 } else
374 bcopy(res->ai_addr, sin, res->ai_addrlen);
375 }
376
377 static int
prefix(void * val,int size)378 prefix(void *val, int size)
379 {
380 u_char *name = (u_char *)val;
381 int byte, bit, plen = 0;
382
383 for (byte = 0; byte < size; byte++, plen += 8)
384 if (name[byte] != 0xff)
385 break;
386 if (byte == size)
387 return (plen);
388 for (bit = 7; bit != 0; bit--, plen++)
389 if (!(name[byte] & (1 << bit)))
390 break;
391 for (; bit != 0; bit--)
392 if (name[byte] & (1 << bit))
393 return(0);
394 byte++;
395 for (; byte < size; byte++)
396 if (name[byte])
397 return(0);
398 return (plen);
399 }
400
401 static char *
sec2str(time_t total)402 sec2str(time_t total)
403 {
404 static char result[256];
405 int days, hours, mins, secs;
406 int first = 1;
407 char *p = result;
408
409 if (0) {
410 days = total / 3600 / 24;
411 hours = (total / 3600) % 24;
412 mins = (total / 60) % 60;
413 secs = total % 60;
414
415 if (days) {
416 first = 0;
417 p += sprintf(p, "%dd", days);
418 }
419 if (!first || hours) {
420 first = 0;
421 p += sprintf(p, "%dh", hours);
422 }
423 if (!first || mins) {
424 first = 0;
425 p += sprintf(p, "%dm", mins);
426 }
427 sprintf(p, "%ds", secs);
428 } else
429 sprintf(result, "%lu", (unsigned long)total);
430
431 return(result);
432 }
433
434 static void
in6_postproc(int s,const struct afswtch * afp)435 in6_postproc(int s, const struct afswtch *afp)
436 {
437 if (explicit_prefix == 0) {
438 /* Aggregatable address architecture defines all prefixes
439 are 64. So, it is convenient to set prefixlen to 64 if
440 it is not specified. */
441 setifprefixlen("64", 0, s, afp);
442 /* in6_getprefix("64", MASK) if MASK is available here... */
443 }
444 }
445
446 static void
in6_status_tunnel(int s)447 in6_status_tunnel(int s)
448 {
449 char src[NI_MAXHOST];
450 char dst[NI_MAXHOST];
451 struct in6_ifreq in6_ifr;
452 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr;
453
454 memset(&in6_ifr, 0, sizeof(in6_ifr));
455 strncpy(in6_ifr.ifr_name, name, IFNAMSIZ);
456
457 if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0)
458 return;
459 if (sa->sa_family != AF_INET6)
460 return;
461 in6_fillscopeid(&in6_ifr.ifr_addr);
462 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0,
463 NI_NUMERICHOST) != 0)
464 src[0] = '\0';
465
466 if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0)
467 return;
468 if (sa->sa_family != AF_INET6)
469 return;
470 in6_fillscopeid(&in6_ifr.ifr_addr);
471 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0,
472 NI_NUMERICHOST) != 0)
473 dst[0] = '\0';
474
475 printf("\ttunnel inet6 %s --> %s\n", src, dst);
476 }
477
478 static void
in6_set_tunnel(int s,struct addrinfo * srcres,struct addrinfo * dstres)479 in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres)
480 {
481 struct in6_aliasreq in6_addreq;
482
483 memset(&in6_addreq, 0, sizeof(in6_addreq));
484 strncpy(in6_addreq.ifra_name, name, IFNAMSIZ);
485 memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len);
486 memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr,
487 dstres->ai_addr->sa_len);
488
489 if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0)
490 warn("SIOCSIFPHYADDR_IN6");
491 }
492
493 static struct cmd inet6_cmds[] = {
494 DEF_CMD_ARG("prefixlen", setifprefixlen),
495 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags),
496 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags),
497 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags),
498 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags),
499 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags),
500 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags),
501 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags),
502 DEF_CMD("prefer_source",IN6_IFF_PREFER_SOURCE, setip6flags),
503 DEF_CMD("-prefer_source",-IN6_IFF_PREFER_SOURCE,setip6flags),
504 DEF_CMD("accept_rtadv", ND6_IFF_ACCEPT_RTADV, setnd6flags),
505 DEF_CMD("-accept_rtadv",-ND6_IFF_ACCEPT_RTADV, setnd6flags),
506 DEF_CMD("no_radr", ND6_IFF_NO_RADR, setnd6flags),
507 DEF_CMD("-no_radr", -ND6_IFF_NO_RADR, setnd6flags),
508 DEF_CMD("defaultif", 1, setnd6defif),
509 DEF_CMD("-defaultif", -1, setnd6defif),
510 DEF_CMD("ifdisabled", ND6_IFF_IFDISABLED, setnd6flags),
511 DEF_CMD("-ifdisabled", -ND6_IFF_IFDISABLED, setnd6flags),
512 DEF_CMD("nud", ND6_IFF_PERFORMNUD, setnd6flags),
513 DEF_CMD("-nud", -ND6_IFF_PERFORMNUD, setnd6flags),
514 DEF_CMD("auto_linklocal",ND6_IFF_AUTO_LINKLOCAL,setnd6flags),
515 DEF_CMD("-auto_linklocal",-ND6_IFF_AUTO_LINKLOCAL,setnd6flags),
516 DEF_CMD("no_prefer_iface",ND6_IFF_NO_PREFER_IFACE,setnd6flags),
517 DEF_CMD("-no_prefer_iface",-ND6_IFF_NO_PREFER_IFACE,setnd6flags),
518 DEF_CMD_ARG("pltime", setip6pltime),
519 DEF_CMD_ARG("vltime", setip6vltime),
520 DEF_CMD("eui64", 0, setip6eui64),
521 };
522
523 static struct afswtch af_inet6 = {
524 .af_name = "inet6",
525 .af_af = AF_INET6,
526 .af_status = in6_status,
527 .af_getaddr = in6_getaddr,
528 .af_getprefix = in6_getprefix,
529 .af_other_status = nd6_status,
530 .af_postproc = in6_postproc,
531 .af_status_tunnel = in6_status_tunnel,
532 .af_settunnel = in6_set_tunnel,
533 .af_difaddr = SIOCDIFADDR_IN6,
534 .af_aifaddr = SIOCAIFADDR_IN6,
535 .af_ridreq = &in6_addreq,
536 .af_addreq = &in6_addreq,
537 };
538
539 static void
in6_Lopt_cb(const char * optarg __unused)540 in6_Lopt_cb(const char *optarg __unused)
541 {
542 ip6lifetime++; /* print IPv6 address lifetime */
543 }
544 static struct option in6_Lopt = { .opt = "L", .opt_usage = "[-L]", .cb = in6_Lopt_cb };
545
546 static __constructor void
inet6_ctor(void)547 inet6_ctor(void)
548 {
549 size_t i;
550
551 #ifndef RESCUE
552 if (!feature_present("inet6"))
553 return;
554 #endif
555
556 for (i = 0; i < nitems(inet6_cmds); i++)
557 cmd_register(&inet6_cmds[i]);
558 af_register(&af_inet6);
559 opt_register(&in6_Lopt);
560 }
561