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kernel - Reduce token backoff
[dragonfly.git] / sbin / ifconfig / af_inet6.c
blob76561e2271691e7c8009b426cb67276e2c837a3c
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 * 3. 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 * $FreeBSD: src/sbin/ifconfig/af_inet6.c,v 1.3 2005/06/16 19:37:09 ume Exp $
30 */
31
32 #include <sys/param.h>
33 #include <sys/ioctl.h>
34 #include <sys/socket.h>
35 #include <net/if.h>
36 #include <net/if_var.h> /* for struct ifaddr */
37 #include <net/route.h> /* for RTX_IFA */
38 #include <netinet/in.h>
39 #include <netinet/in_var.h>
40 #include <netinet6/nd6.h> /* Define ND6_INFINITE_LIFETIME */
41 #include <arpa/inet.h>
42 #include <netdb.h>
43
44 #include <err.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49 #include <time.h>
50 #include <ifaddrs.h>
51
52 #include "ifconfig.h"
53
54 static struct in6_ifreq in6_ridreq;
55 static struct in6_aliasreq in6_addreq =
56 { { 0 },
57 { 0 },
58 { 0 },
59 { 0 },
60 0,
61 { 0, 0, ND6_INFINITE_LIFETIME, ND6_INFINITE_LIFETIME } };
62 static int ip6lifetime;
63
64 static void in6_fillscopeid(struct sockaddr_in6 *sin6);
65 static int prefix(void *, int);
66 static char *sec2str(time_t);
67 static int explicit_prefix = 0;
68
69 static char addr_buf[MAXHOSTNAMELEN *2 + 1]; /*for getnameinfo()*/
70
71 static void
72 setifprefixlen(const char *addr, int dummy __unused, int s,
73 const struct afswtch *afp)
74 {
75 if (afp->af_getprefix != NULL)
76 afp->af_getprefix(addr, MASK);
77 explicit_prefix = 1;
78 }
79
80 static void
81 setip6flags(const char *dummyaddr __unused, int flag, int dummysoc __unused,
82 const struct afswtch *afp)
83 {
84 if (afp->af_af != AF_INET6)
85 err(1, "address flags can be set only for inet6 addresses");
86
87 if (flag < 0)
88 in6_addreq.ifra_flags &= ~(-flag);
89 else
90 in6_addreq.ifra_flags |= flag;
91 }
92
93 static void
94 setip6lifetime(const char *cmd, const char *val, int s,
95 const struct afswtch *afp)
96 {
97 struct timespec now;
98 time_t newval;
99 char *ep;
100
101 clock_gettime(CLOCK_MONOTONIC_FAST, &now);
102 newval = (time_t)strtoul(val, &ep, 0);
103 if (val == ep)
104 errx(1, "invalid %s", cmd);
105 if (afp->af_af != AF_INET6)
106 errx(1, "%s not allowed for the AF", cmd);
107 if (strcmp(cmd, "vltime") == 0) {
108 in6_addreq.ifra_lifetime.ia6t_expire = now.tv_sec + newval;
109 in6_addreq.ifra_lifetime.ia6t_vltime = newval;
110 } else if (strcmp(cmd, "pltime") == 0) {
111 in6_addreq.ifra_lifetime.ia6t_preferred = now.tv_sec + newval;
112 in6_addreq.ifra_lifetime.ia6t_pltime = newval;
113 }
114 }
115
116 static void
117 setip6pltime(const char *seconds, int dummy __unused, int s,
118 const struct afswtch *afp)
119 {
120 setip6lifetime("pltime", seconds, s, afp);
121 }
122
123 static void
124 setip6vltime(const char *seconds, int dummy __unused, int s,
125 const struct afswtch *afp)
126 {
127 setip6lifetime("vltime", seconds, s, afp);
128 }
129
130 static void
131 setip6eui64(const char *cmd, int dummy __unused, int s,
132 const struct afswtch *afp)
133 {
134 struct ifaddrs *ifap, *ifa;
135 const struct sockaddr_in6 *sin6 = NULL;
136 const struct in6_addr *lladdr = NULL;
137 struct in6_addr *in6;
138
139 if (afp->af_af != AF_INET6)
140 errx(EXIT_FAILURE, "%s not allowed for the AF", cmd);
141 in6 = (struct in6_addr *)&in6_addreq.ifra_addr.sin6_addr;
142 if (memcmp(&in6addr_any.s6_addr[8], &in6->s6_addr[8], 8) != 0)
143 errx(EXIT_FAILURE, "interface index is already filled");
144 if (getifaddrs(&ifap) != 0)
145 err(EXIT_FAILURE, "getifaddrs");
146 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
147 if (ifa->ifa_addr->sa_family == AF_INET6 &&
148 strcmp(ifa->ifa_name, name) == 0) {
149 sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr;
150 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
151 lladdr = &sin6->sin6_addr;
152 break;
153 }
154 }
155 }
156 if (!lladdr)
157 errx(EXIT_FAILURE, "could not determine link local address");
158
159 memcpy(&in6->s6_addr[8], &lladdr->s6_addr[8], 8);
160
161 freeifaddrs(ifap);
162 }
163
164 static void
165 in6_fillscopeid(struct sockaddr_in6 *sin6)
166 {
167 #if defined(__KAME__) && defined(KAME_SCOPEID)
168 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
169 sin6->sin6_scope_id =
170 ntohs(*(u_int16_t *)&sin6->sin6_addr.s6_addr[2]);
171 sin6->sin6_addr.s6_addr[2] = sin6->sin6_addr.s6_addr[3] = 0;
172 }
173 #endif
174 }
175
176 static void
177 in6_status(int s __unused, const struct rt_addrinfo * info)
178 {
179 struct sockaddr_in6 *sin, null_sin;
180 struct in6_ifreq ifr6;
181 int s6;
182 u_int32_t flags6;
183 struct in6_addrlifetime lifetime;
184 struct timespec now;
185 int error;
186 u_int32_t scopeid;
187
188 clock_gettime(CLOCK_MONOTONIC_FAST, &now);
189
190 memset(&null_sin, 0, sizeof(null_sin));
191
192 sin = (struct sockaddr_in6 *)info->rti_info[RTAX_IFA];
193 if (sin == NULL)
194 return;
195
196 strlcpy(ifr6.ifr_name, ifr.ifr_name, IFNAMSIZ);
197 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
198 warn("socket(AF_INET6,SOCK_DGRAM)");
199 return;
200 }
201 ifr6.ifr_addr = *sin;
202 if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
203 warn("ioctl(SIOCGIFAFLAG_IN6)");
204 close(s6);
205 return;
206 }
207 flags6 = ifr6.ifr_ifru.ifru_flags6;
208 memset(&lifetime, 0, sizeof(lifetime));
209 ifr6.ifr_addr = *sin;
210 if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) {
211 warn("ioctl(SIOCGIFALIFETIME_IN6)");
212 close(s6);
213 return;
214 }
215 lifetime = ifr6.ifr_ifru.ifru_lifetime;
216 close(s6);
217
218 /* XXX: embedded link local addr check */
219 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) &&
220 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) {
221 u_short index;
222
223 index = *(u_short *)&sin->sin6_addr.s6_addr[2];
224 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0;
225 if (sin->sin6_scope_id == 0)
226 sin->sin6_scope_id = ntohs(index);
227 }
228 scopeid = sin->sin6_scope_id;
229
230 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf,
231 sizeof(addr_buf), NULL, 0, NI_NUMERICHOST);
232 if (error != 0)
233 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf,
234 sizeof(addr_buf));
235 printf("\tinet6 %s ", addr_buf);
236
237 if (flags & IFF_POINTOPOINT) {
238 /* note RTAX_BRD overlap with IFF_BROADCAST */
239 sin = (struct sockaddr_in6 *)info->rti_info[RTAX_BRD];
240 /*
241 * some of the interfaces do not have valid destination
242 * address.
243 */
244 if (sin && sin->sin6_family == AF_INET6) {
245 int error;
246
247 /* XXX: embedded link local addr check */
248 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) &&
249 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) {
250 u_short index;
251
252 index = *(u_short *)&sin->sin6_addr.s6_addr[2];
253 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0;
254 if (sin->sin6_scope_id == 0)
255 sin->sin6_scope_id = ntohs(index);
256 }
257
258 error = getnameinfo((struct sockaddr *)sin,
259 sin->sin6_len, addr_buf,
260 sizeof(addr_buf), NULL, 0,
261 NI_NUMERICHOST);
262 if (error != 0)
263 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf,
264 sizeof(addr_buf));
265 printf("--> %s ", addr_buf);
266 }
267 }
268
269 sin = (struct sockaddr_in6 *)info->rti_info[RTAX_NETMASK];
270 if (!sin)
271 sin = &null_sin;
272 printf("prefixlen %d ", prefix(&sin->sin6_addr,
273 sizeof(struct in6_addr)));
274
275 if ((flags6 & IN6_IFF_ANYCAST) != 0)
276 printf("anycast ");
277 if ((flags6 & IN6_IFF_TENTATIVE) != 0)
278 printf("tentative ");
279 if ((flags6 & IN6_IFF_DUPLICATED) != 0)
280 printf("duplicated ");
281 if ((flags6 & IN6_IFF_DETACHED) != 0)
282 printf("detached ");
283 if ((flags6 & IN6_IFF_DEPRECATED) != 0)
284 printf("deprecated ");
285 if ((flags6 & IN6_IFF_AUTOCONF) != 0)
286 printf("autoconf ");
287 if ((flags6 & IN6_IFF_TEMPORARY) != 0)
288 printf("temporary ");
289
290 if (scopeid)
291 printf("scopeid 0x%x ", scopeid);
292
293 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) {
294 printf("pltime ");
295 if (lifetime.ia6t_preferred) {
296 printf("%s ", lifetime.ia6t_preferred < now.tv_sec
297 ? "0" : sec2str(lifetime.ia6t_preferred - now.tv_sec));
298 } else
299 printf("infty ");
300
301 printf("vltime ");
302 if (lifetime.ia6t_expire) {
303 printf("%s ", lifetime.ia6t_expire < now.tv_sec
304 ? "0" : sec2str(lifetime.ia6t_expire - now.tv_sec));
305 } else
306 printf("infty ");
307 }
308
309 putchar('\n');
310 }
311
312 #define SIN6(x) ((struct sockaddr_in6 *) &(x))
313 static struct sockaddr_in6 *sin6tab[] = {
314 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr),
315 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr)
316 };
317
318 static void
319 in6_getprefix(const char *plen, int which)
320 {
321 struct sockaddr_in6 *sin = sin6tab[which];
322 u_char *cp;
323 int len = atoi(plen);
324
325 if ((len < 0) || (len > 128))
326 errx(1, "%s: bad value", plen);
327 sin->sin6_len = sizeof(*sin);
328 if (which != MASK)
329 sin->sin6_family = AF_INET6;
330 if ((len == 0) || (len == 128)) {
331 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr));
332 return;
333 }
334 memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr));
335 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8)
336 *cp++ = 0xff;
337 *cp = 0xff << (8 - len);
338 }
339
340 static void
341 in6_getaddr(const char *s, int which)
342 {
343 struct sockaddr_in6 *sin = sin6tab[which];
344 struct addrinfo hints, *res;
345 int error = -1;
346
347 newaddr &= 1;
348
349 sin->sin6_len = sizeof(*sin);
350 if (which != MASK)
351 sin->sin6_family = AF_INET6;
352
353 if (which == ADDR) {
354 char *p = NULL;
355 if((p = strrchr(s, '/')) != NULL) {
356 *p = '\0';
357 in6_getprefix(p + 1, MASK);
358 explicit_prefix = 1;
359 }
360 }
361
362 if (sin->sin6_family == AF_INET6) {
363 bzero(&hints, sizeof(struct addrinfo));
364 hints.ai_family = AF_INET6;
365 error = getaddrinfo(s, NULL, &hints, &res);
366 }
367 if (error != 0) {
368 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1)
369 errx(1, "%s: bad value", s);
370 } else
371 bcopy(res->ai_addr, sin, res->ai_addrlen);
372 }
373
374 static int
375 prefix(void *val, int size)
376 {
377 u_char *name = (u_char *)val;
378 int byte, bit, plen = 0;
379
380 for (byte = 0; byte < size; byte++, plen += 8)
381 if (name[byte] != 0xff)
382 break;
383 if (byte == size)
384 return (plen);
385 for (bit = 7; bit != 0; bit--, plen++)
386 if (!(name[byte] & (1 << bit)))
387 break;
388 for (; bit != 0; bit--)
389 if (name[byte] & (1 << bit))
390 return(0);
391 byte++;
392 for (; byte < size; byte++)
393 if (name[byte])
394 return(0);
395 return (plen);
396 }
397
398 static char *
399 sec2str(time_t total)
400 {
401 static char result[256];
402 int days, hours, mins, secs;
403 int first = 1;
404 char *p = result;
405
406 if (0) {
407 days = total / 3600 / 24;
408 hours = (total / 3600) % 24;
409 mins = (total / 60) % 60;
410 secs = total % 60;
411
412 if (days) {
413 first = 0;
414 p += sprintf(p, "%dd", days);
415 }
416 if (!first || hours) {
417 first = 0;
418 p += sprintf(p, "%dh", hours);
419 }
420 if (!first || mins) {
421 first = 0;
422 p += sprintf(p, "%dm", mins);
423 }
424 sprintf(p, "%ds", secs);
425 } else
426 sprintf(result, "%lu", (unsigned long)total);
427
428 return(result);
429 }
430
431 static void
432 in6_postproc(int s, const struct afswtch *afp)
433 {
434 if (explicit_prefix == 0) {
435 /* Aggregatable address architecture defines all prefixes
436 are 64. So, it is convenient to set prefixlen to 64 if
437 it is not specified. */
438 setifprefixlen("64", 0, s, afp);
439 /* in6_getprefix("64", MASK) if MASK is available here... */
440 }
441 }
442
443 static void
444 in6_status_tunnel(int s)
445 {
446 char src[NI_MAXHOST];
447 char dst[NI_MAXHOST];
448 struct in6_ifreq in6_ifr;
449 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr;
450
451 memset(&in6_ifr, 0, sizeof(in6_ifr));
452 strlcpy(in6_ifr.ifr_name, name, IFNAMSIZ);
453
454 if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0)
455 return;
456 if (sa->sa_family != AF_INET6)
457 return;
458 in6_fillscopeid(&in6_ifr.ifr_addr);
459 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0,
460 NI_NUMERICHOST) != 0)
461 src[0] = '\0';
462
463 if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0)
464 return;
465 if (sa->sa_family != AF_INET6)
466 return;
467 in6_fillscopeid(&in6_ifr.ifr_addr);
468 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0,
469 NI_NUMERICHOST) != 0)
470 dst[0] = '\0';
471
472 printf("\ttunnel inet6 %s --> %s\n", src, dst);
473 }
474
475 static void
476 in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres)
477 {
478 struct in6_aliasreq in6_addreq;
479
480 memset(&in6_addreq, 0, sizeof(in6_addreq));
481 strlcpy(in6_addreq.ifra_name, name, IFNAMSIZ);
482 memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len);
483 memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr,
484 dstres->ai_addr->sa_len);
485
486 if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0)
487 warn("SIOCSIFPHYADDR_IN6");
488 }
489
490 static struct cmd inet6_cmds[] = {
491 DEF_CMD_ARG("prefixlen", setifprefixlen),
492 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags),
493 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags),
494 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags),
495 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags),
496 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags),
497 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags),
498 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags),
499 DEF_CMD_ARG("pltime", setip6pltime),
500 DEF_CMD_ARG("vltime", setip6vltime),
501 DEF_CMD("eui64", 0, setip6eui64),
502 };
503
504 static struct afswtch af_inet6 = {
505 .af_name = "inet6",
506 .af_af = AF_INET6,
507 .af_status = in6_status,
508 .af_getaddr = in6_getaddr,
509 .af_getprefix = in6_getprefix,
510 .af_postproc = in6_postproc,
511 .af_status_tunnel = in6_status_tunnel,
512 .af_settunnel = in6_set_tunnel,
513 .af_difaddr = SIOCDIFADDR_IN6,
514 .af_aifaddr = SIOCAIFADDR_IN6,
515 .af_ridreq = &in6_ridreq,
516 .af_addreq = &in6_addreq,
517 };
518
519 static void
520 in6_Lopt_cb(const char *optarg __unused)
521 {
522 ip6lifetime++; /* print IPv6 address lifetime */
523 }
524 static struct option in6_Lopt = { "L", "[-L]", in6_Lopt_cb, NULL };
525
526 static __constructor(101) void
527 inet6_ctor(void)
528 {
529 size_t i;
530
531 for (i = 0; i < nitems(inet6_cmds); i++)
532 cmd_register(&inet6_cmds[i]);
533 af_register(&af_inet6);
534 opt_register(&in6_Lopt);
535 }
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