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 <netinet/in.h> 38 #include <netinet/in_var.h> 39 #include <netinet6/nd6.h> /* Define ND6_INFINITE_LIFETIME */ 40 #include <arpa/inet.h> 41 #include <netdb.h> 42 43 #include <err.h> 44 #include <ifaddrs.h> 45 #include <stdbool.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <time.h> 50 #include <unistd.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[NI_MAXHOST]; /* for getnameinfo() */ 70 71 static void 72 setifprefixlen(const char *addr, int dummy __unused, int s __unused, 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 *addr __unused, int flag, int s __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 __unused, 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 __unused, 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, IfName) == 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 #else 174 (void)sin6; 175 #endif 176 } 177 178 static void 179 in6_status(int s __unused, const struct ifaddrs *ifa) 180 { 181 struct sockaddr_in6 *sin, null_sin; 182 struct in6_ifreq ifr6; 183 int s6; 184 u_int32_t flags6; 185 struct in6_addrlifetime lifetime; 186 struct timespec now; 187 int n_flags, prefixlen; 188 int error; 189 u_int32_t scopeid; 190 191 clock_gettime(CLOCK_MONOTONIC_FAST, &now); 192 193 memset(&null_sin, 0, sizeof(null_sin)); 194 195 sin = (struct sockaddr_in6 *)ifa->ifa_addr; 196 if (sin == NULL) 197 return; 198 199 strlcpy(ifr6.ifr_name, IfName, sizeof(ifr6.ifr_name)); 200 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 201 warn("socket(AF_INET6,SOCK_DGRAM)"); 202 return; 203 } 204 ifr6.ifr_addr = *sin; 205 if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) { 206 warn("ioctl(SIOCGIFAFLAG_IN6)"); 207 close(s6); 208 return; 209 } 210 flags6 = ifr6.ifr_ifru.ifru_flags6; 211 memset(&lifetime, 0, sizeof(lifetime)); 212 ifr6.ifr_addr = *sin; 213 if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) { 214 warn("ioctl(SIOCGIFALIFETIME_IN6)"); 215 close(s6); 216 return; 217 } 218 lifetime = ifr6.ifr_ifru.ifru_lifetime; 219 close(s6); 220 221 /* XXX: embedded link local addr check */ 222 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) && 223 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) { 224 u_short index; 225 226 index = *(u_short *)&sin->sin6_addr.s6_addr[2]; 227 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0; 228 if (sin->sin6_scope_id == 0) 229 sin->sin6_scope_id = ntohs(index); 230 } 231 scopeid = sin->sin6_scope_id; 232 233 if (f_addr != NULL && strcmp(f_addr, "fqdn") == 0) 234 n_flags = 0; 235 else if (f_addr != NULL && strcmp(f_addr, "host") == 0) 236 n_flags = NI_NOFQDN; 237 else 238 n_flags = NI_NUMERICHOST; 239 240 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf, 241 sizeof(addr_buf), NULL, 0, n_flags); 242 if (error != 0) 243 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 244 sizeof(addr_buf)); 245 printf("\tinet6 %s", addr_buf); 246 247 if (ifa->ifa_flags & IFF_POINTOPOINT) { 248 sin = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 249 /* 250 * some of the interfaces do not have valid destination 251 * address. 252 */ 253 if (sin != NULL && sin->sin6_family == AF_INET6) { 254 /* XXX: embedded link local addr check */ 255 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) && 256 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) { 257 u_short index; 258 259 index = *(u_short *)&sin->sin6_addr.s6_addr[2]; 260 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0; 261 if (sin->sin6_scope_id == 0) 262 sin->sin6_scope_id = ntohs(index); 263 } 264 265 error = getnameinfo((struct sockaddr *)sin, 266 sin->sin6_len, addr_buf, 267 sizeof(addr_buf), NULL, 0, 268 NI_NUMERICHOST); 269 if (error != 0) 270 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 271 sizeof(addr_buf)); 272 printf(" --> %s", addr_buf); 273 } 274 } 275 276 sin = (struct sockaddr_in6 *)ifa->ifa_netmask; 277 if (sin == NULL) 278 sin = &null_sin; 279 prefixlen = prefix(&sin->sin6_addr, sizeof(struct in6_addr)); 280 if (f_inet6 != NULL && strcmp(f_inet6, "cidr") == 0) 281 printf("/%d", prefixlen); 282 else 283 printf(" prefixlen %d", prefixlen); 284 285 if ((flags6 & IN6_IFF_ANYCAST) != 0) 286 printf(" anycast"); 287 if ((flags6 & IN6_IFF_TENTATIVE) != 0) 288 printf(" tentative"); 289 if ((flags6 & IN6_IFF_DUPLICATED) != 0) 290 printf(" duplicated"); 291 if ((flags6 & IN6_IFF_DETACHED) != 0) 292 printf(" detached"); 293 if ((flags6 & IN6_IFF_DEPRECATED) != 0) 294 printf(" deprecated"); 295 if ((flags6 & IN6_IFF_AUTOCONF) != 0) 296 printf(" autoconf"); 297 if ((flags6 & IN6_IFF_TEMPORARY) != 0) 298 printf(" temporary"); 299 300 if (scopeid) 301 printf(" scopeid 0x%x", scopeid); 302 303 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) { 304 printf(" pltime"); 305 if (lifetime.ia6t_preferred) { 306 printf(" %s", lifetime.ia6t_preferred < now.tv_sec 307 ? "0" : sec2str(lifetime.ia6t_preferred - now.tv_sec)); 308 } else { 309 printf(" infty"); 310 } 311 312 printf(" vltime"); 313 if (lifetime.ia6t_expire) { 314 printf(" %s", lifetime.ia6t_expire < now.tv_sec 315 ? "0" : sec2str(lifetime.ia6t_expire - now.tv_sec)); 316 } else { 317 printf(" infty"); 318 } 319 } 320 321 putchar('\n'); 322 } 323 324 #define SIN6(x) ((struct sockaddr_in6 *) &(x)) 325 static struct sockaddr_in6 *sin6tab[] = { 326 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr), 327 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr) 328 }; 329 330 static void 331 in6_getprefix(const char *plen, int which) 332 { 333 struct sockaddr_in6 *sin = sin6tab[which]; 334 u_char *cp; 335 int len = atoi(plen); 336 337 if ((len < 0) || (len > 128)) 338 errx(1, "%s: bad value", plen); 339 sin->sin6_len = sizeof(*sin); 340 if (which != MASK) 341 sin->sin6_family = AF_INET6; 342 if ((len == 0) || (len == 128)) { 343 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr)); 344 return; 345 } 346 memset(&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr)); 347 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8) 348 *cp++ = 0xff; 349 *cp = 0xff << (8 - len); 350 } 351 352 static void 353 in6_getaddr(const char *s, int which) 354 { 355 struct sockaddr_in6 *sin = sin6tab[which]; 356 struct addrinfo hints, *res; 357 int error = -1; 358 359 newaddr = true; 360 361 sin->sin6_len = sizeof(*sin); 362 if (which != MASK) 363 sin->sin6_family = AF_INET6; 364 365 if (which == ADDR) { 366 char *p = NULL; 367 if((p = strrchr(s, '/')) != NULL) { 368 *p = '\0'; 369 in6_getprefix(p + 1, MASK); 370 explicit_prefix = 1; 371 } 372 } 373 374 if (sin->sin6_family == AF_INET6) { 375 memset(&hints, 0, sizeof(struct addrinfo)); 376 hints.ai_family = AF_INET6; 377 error = getaddrinfo(s, NULL, &hints, &res); 378 } 379 if (error != 0) { 380 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1) 381 errx(1, "%s: bad value", s); 382 } else 383 memcpy(sin, res->ai_addr, res->ai_addrlen); 384 } 385 386 static int 387 prefix(void *val, int size) 388 { 389 u_char *name = (u_char *)val; 390 int byte, bit, plen = 0; 391 392 for (byte = 0; byte < size; byte++, plen += 8) 393 if (name[byte] != 0xff) 394 break; 395 if (byte == size) 396 return (plen); 397 for (bit = 7; bit != 0; bit--, plen++) 398 if (!(name[byte] & (1 << bit))) 399 break; 400 for (; bit != 0; bit--) 401 if (name[byte] & (1 << bit)) 402 return(0); 403 byte++; 404 for (; byte < size; byte++) 405 if (name[byte]) 406 return(0); 407 return (plen); 408 } 409 410 static char * 411 sec2str(time_t total) 412 { 413 static char result[256]; 414 int days, hours, mins, secs; 415 int first = 1; 416 char *p = result; 417 418 if (0) { 419 days = total / 3600 / 24; 420 hours = (total / 3600) % 24; 421 mins = (total / 60) % 60; 422 secs = total % 60; 423 424 if (days) { 425 first = 0; 426 p += sprintf(p, "%dd", days); 427 } 428 if (!first || hours) { 429 first = 0; 430 p += sprintf(p, "%dh", hours); 431 } 432 if (!first || mins) { 433 first = 0; 434 p += sprintf(p, "%dm", mins); 435 } 436 sprintf(p, "%ds", secs); 437 } else 438 sprintf(result, "%lu", (unsigned long)total); 439 440 return(result); 441 } 442 443 static void 444 in6_postproc(int s, const struct afswtch *afp) 445 { 446 if (explicit_prefix == 0) { 447 /* Aggregatable address architecture defines all prefixes 448 are 64. So, it is convenient to set prefixlen to 64 if 449 it is not specified. */ 450 setifprefixlen("64", 0, s, afp); 451 /* in6_getprefix("64", MASK) if MASK is available here... */ 452 } 453 } 454 455 static void 456 in6_status_tunnel(int s) 457 { 458 char src[NI_MAXHOST]; 459 char dst[NI_MAXHOST]; 460 struct in6_ifreq in6_ifr; 461 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr; 462 463 memset(&in6_ifr, 0, sizeof(in6_ifr)); 464 strlcpy(in6_ifr.ifr_name, IfName, sizeof(in6_ifr.ifr_name)); 465 466 if (ioctl(s, SIOCGIFPSRCADDR_IN6, &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, src, sizeof(src), 0, 0, 472 NI_NUMERICHOST) != 0) 473 src[0] = '\0'; 474 475 if (ioctl(s, SIOCGIFPDSTADDR_IN6, &in6_ifr) < 0) 476 return; 477 if (sa->sa_family != AF_INET6) 478 return; 479 in6_fillscopeid(&in6_ifr.ifr_addr); 480 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, 481 NI_NUMERICHOST) != 0) 482 dst[0] = '\0'; 483 484 printf("\ttunnel inet6 %s --> %s\n", src, dst); 485 } 486 487 static void 488 in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 489 { 490 struct in6_aliasreq addreq; 491 492 memset(&addreq, 0, sizeof(addreq)); 493 strlcpy(addreq.ifra_name, IfName, sizeof(addreq.ifra_name)); 494 memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 495 memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len); 496 497 if (ioctl(s, SIOCSIFPHYADDR_IN6, &addreq) < 0) 498 warn("SIOCSIFPHYADDR_IN6"); 499 } 500 501 static struct cmd inet6_cmds[] = { 502 DEF_CMD_ARG("prefixlen", setifprefixlen), 503 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags), 504 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags), 505 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags), 506 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags), 507 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags), 508 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags), 509 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags), 510 DEF_CMD_ARG("pltime", setip6pltime), 511 DEF_CMD_ARG("vltime", setip6vltime), 512 DEF_CMD("eui64", 0, setip6eui64), 513 }; 514 515 static struct afswtch af_inet6 = { 516 .af_name = "inet6", 517 .af_af = AF_INET6, 518 .af_status = in6_status, 519 .af_getaddr = in6_getaddr, 520 .af_getprefix = in6_getprefix, 521 .af_postproc = in6_postproc, 522 .af_status_tunnel = in6_status_tunnel, 523 .af_settunnel = in6_set_tunnel, 524 .af_difaddr = SIOCDIFADDR_IN6, 525 .af_aifaddr = SIOCAIFADDR_IN6, 526 .af_ridreq = &in6_ridreq, 527 .af_addreq = &in6_addreq, 528 }; 529 530 static void 531 in6_Lopt_cb(const char *arg __unused) 532 { 533 ip6lifetime++; /* print IPv6 address lifetime */ 534 } 535 static struct option in6_Lopt = { "L", "[-L]", in6_Lopt_cb, NULL }; 536 537 __constructor(113) 538 static void 539 inet6_ctor(void) 540 { 541 size_t i; 542 543 for (i = 0; i < nitems(inet6_cmds); i++) 544 cmd_register(&inet6_cmds[i]); 545 546 af_register(&af_inet6); 547 opt_register(&in6_Lopt); 548 } 549