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 "$FreeBSD$"; 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 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 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 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 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 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 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 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 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 "); 290 291 if (scopeid) 292 printf("scopeid 0x%x ", scopeid); 293 294 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) { 295 printf("pltime "); 296 if (lifetime.ia6t_preferred) { 297 printf("%s ", lifetime.ia6t_preferred < t 298 ? "0" : sec2str(lifetime.ia6t_preferred - t)); 299 } else 300 printf("infty "); 301 302 printf("vltime "); 303 if (lifetime.ia6t_expire) { 304 printf("%s ", lifetime.ia6t_expire < t 305 ? "0" : sec2str(lifetime.ia6t_expire - t)); 306 } else 307 printf("infty "); 308 } 309 310 print_vhid(ifa, " "); 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 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 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 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 * 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 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 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 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("accept_rtadv", ND6_IFF_ACCEPT_RTADV, setnd6flags), 503 DEF_CMD("-accept_rtadv",-ND6_IFF_ACCEPT_RTADV, setnd6flags), 504 DEF_CMD("no_radr", ND6_IFF_NO_RADR, setnd6flags), 505 DEF_CMD("-no_radr", -ND6_IFF_NO_RADR, setnd6flags), 506 DEF_CMD("defaultif", 1, setnd6defif), 507 DEF_CMD("-defaultif", -1, setnd6defif), 508 DEF_CMD("ifdisabled", ND6_IFF_IFDISABLED, setnd6flags), 509 DEF_CMD("-ifdisabled", -ND6_IFF_IFDISABLED, setnd6flags), 510 DEF_CMD("nud", ND6_IFF_PERFORMNUD, setnd6flags), 511 DEF_CMD("-nud", -ND6_IFF_PERFORMNUD, setnd6flags), 512 DEF_CMD("prefer_source",ND6_IFF_PREFER_SOURCE, setnd6flags), 513 DEF_CMD("-prefer_source",-ND6_IFF_PREFER_SOURCE,setnd6flags), 514 DEF_CMD("auto_linklocal",ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 515 DEF_CMD("-auto_linklocal",-ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 516 DEF_CMD_ARG("pltime", setip6pltime), 517 DEF_CMD_ARG("vltime", setip6vltime), 518 DEF_CMD("eui64", 0, setip6eui64), 519 }; 520 521 static struct afswtch af_inet6 = { 522 .af_name = "inet6", 523 .af_af = AF_INET6, 524 .af_status = in6_status, 525 .af_getaddr = in6_getaddr, 526 .af_getprefix = in6_getprefix, 527 .af_other_status = nd6_status, 528 .af_postproc = in6_postproc, 529 .af_status_tunnel = in6_status_tunnel, 530 .af_settunnel = in6_set_tunnel, 531 .af_difaddr = SIOCDIFADDR_IN6, 532 .af_aifaddr = SIOCAIFADDR_IN6, 533 .af_ridreq = &in6_addreq, 534 .af_addreq = &in6_addreq, 535 }; 536 537 static void 538 in6_Lopt_cb(const char *optarg __unused) 539 { 540 ip6lifetime++; /* print IPv6 address lifetime */ 541 } 542 static struct option in6_Lopt = { .opt = "L", .opt_usage = "[-L]", .cb = in6_Lopt_cb }; 543 544 static __constructor void 545 inet6_ctor(void) 546 { 547 #define N(a) (sizeof(a) / sizeof(a[0])) 548 size_t i; 549 550 #ifndef RESCUE 551 if (!feature_present("inet6")) 552 return; 553 #endif 554 555 for (i = 0; i < N(inet6_cmds); i++) 556 cmd_register(&inet6_cmds[i]); 557 af_register(&af_inet6); 558 opt_register(&in6_Lopt); 559 #undef N 560 } 561