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