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 * $DragonFly: src/sbin/ifconfig/af_inet6.c,v 1.1 2006/04/02 03:33:59 sephe Exp $ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/ioctl.h> 35 #include <sys/socket.h> 36 #include <net/if.h> 37 #include <net/route.h> /* for RTX_IFA */ 38 39 #include <err.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include <ifaddrs.h> 45 46 #include <arpa/inet.h> 47 48 #include <netinet/in.h> 49 #include <net/if_var.h> /* for struct ifaddr */ 50 #include <netinet/in_var.h> 51 #include <arpa/inet.h> 52 #include <netdb.h> 53 54 #include <netinet6/nd6.h> /* Define ND6_INFINITE_LIFETIME */ 55 56 #include "ifconfig.h" 57 58 static struct in6_ifreq in6_ridreq; 59 static struct in6_aliasreq in6_addreq = 60 { { 0 }, 61 { 0 }, 62 { 0 }, 63 { 0 }, 64 0, 65 { 0, 0, ND6_INFINITE_LIFETIME, ND6_INFINITE_LIFETIME } }; 66 static int ip6lifetime; 67 68 static void in6_fillscopeid(struct sockaddr_in6 *sin6); 69 static int prefix(void *, int); 70 static char *sec2str(time_t); 71 static int explicit_prefix = 0; 72 73 static char addr_buf[MAXHOSTNAMELEN *2 + 1]; /*for getnameinfo()*/ 74 75 static void 76 setifprefixlen(const char *addr, int dummy __unused, int s, 77 const struct afswtch *afp) 78 { 79 if (afp->af_getprefix != NULL) 80 afp->af_getprefix(addr, MASK); 81 explicit_prefix = 1; 82 } 83 84 static void 85 setip6flags(const char *dummyaddr __unused, int flag, int dummysoc __unused, 86 const struct afswtch *afp) 87 { 88 if (afp->af_af != AF_INET6) 89 err(1, "address flags can be set only for inet6 addresses"); 90 91 if (flag < 0) 92 in6_addreq.ifra_flags &= ~(-flag); 93 else 94 in6_addreq.ifra_flags |= flag; 95 } 96 97 static void 98 setip6lifetime(const char *cmd, const char *val, int s, 99 const struct afswtch *afp) 100 { 101 time_t newval, t; 102 char *ep; 103 104 t = time(NULL); 105 newval = (time_t)strtoul(val, &ep, 0); 106 if (val == ep) 107 errx(1, "invalid %s", cmd); 108 if (afp->af_af != AF_INET6) 109 errx(1, "%s not allowed for the AF", cmd); 110 if (strcmp(cmd, "vltime") == 0) { 111 in6_addreq.ifra_lifetime.ia6t_expire = t + newval; 112 in6_addreq.ifra_lifetime.ia6t_vltime = newval; 113 } else if (strcmp(cmd, "pltime") == 0) { 114 in6_addreq.ifra_lifetime.ia6t_preferred = t + newval; 115 in6_addreq.ifra_lifetime.ia6t_pltime = newval; 116 } 117 } 118 119 static void 120 setip6pltime(const char *seconds, int dummy __unused, int s, 121 const struct afswtch *afp) 122 { 123 setip6lifetime("pltime", seconds, s, afp); 124 } 125 126 static void 127 setip6vltime(const char *seconds, int dummy __unused, int s, 128 const struct afswtch *afp) 129 { 130 setip6lifetime("vltime", seconds, s, afp); 131 } 132 133 static void 134 setip6eui64(const char *cmd, int dummy __unused, int s, 135 const struct afswtch *afp) 136 { 137 struct ifaddrs *ifap, *ifa; 138 const struct sockaddr_in6 *sin6 = NULL; 139 const struct in6_addr *lladdr = NULL; 140 struct in6_addr *in6; 141 142 if (afp->af_af != AF_INET6) 143 errx(EXIT_FAILURE, "%s not allowed for the AF", cmd); 144 in6 = (struct in6_addr *)&in6_addreq.ifra_addr.sin6_addr; 145 if (memcmp(&in6addr_any.s6_addr[8], &in6->s6_addr[8], 8) != 0) 146 errx(EXIT_FAILURE, "interface index is already filled"); 147 if (getifaddrs(&ifap) != 0) 148 err(EXIT_FAILURE, "getifaddrs"); 149 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 150 if (ifa->ifa_addr->sa_family == AF_INET6 && 151 strcmp(ifa->ifa_name, name) == 0) { 152 sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr; 153 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 154 lladdr = &sin6->sin6_addr; 155 break; 156 } 157 } 158 } 159 if (!lladdr) 160 errx(EXIT_FAILURE, "could not determine link local address"); 161 162 memcpy(&in6->s6_addr[8], &lladdr->s6_addr[8], 8); 163 164 freeifaddrs(ifap); 165 } 166 167 static void 168 in6_fillscopeid(struct sockaddr_in6 *sin6) 169 { 170 #if defined(__KAME__) && defined(KAME_SCOPEID) 171 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 172 sin6->sin6_scope_id = 173 ntohs(*(u_int16_t *)&sin6->sin6_addr.s6_addr[2]); 174 sin6->sin6_addr.s6_addr[2] = sin6->sin6_addr.s6_addr[3] = 0; 175 } 176 #endif 177 } 178 179 static void 180 in6_status(int s __unused, const struct rt_addrinfo * info) 181 { 182 struct sockaddr_in6 *sin, null_sin; 183 struct in6_ifreq ifr6; 184 int s6; 185 u_int32_t flags6; 186 struct in6_addrlifetime lifetime; 187 time_t t = time(NULL); 188 int error; 189 u_int32_t scopeid; 190 191 memset(&null_sin, 0, sizeof(null_sin)); 192 193 sin = (struct sockaddr_in6 *)info->rti_info[RTAX_IFA]; 194 if (sin == NULL) 195 return; 196 197 strncpy(ifr6.ifr_name, ifr.ifr_name, sizeof(ifr.ifr_name)); 198 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 199 warn("socket(AF_INET6,SOCK_DGRAM)"); 200 return; 201 } 202 ifr6.ifr_addr = *sin; 203 if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) { 204 warn("ioctl(SIOCGIFAFLAG_IN6)"); 205 close(s6); 206 return; 207 } 208 flags6 = ifr6.ifr_ifru.ifru_flags6; 209 memset(&lifetime, 0, sizeof(lifetime)); 210 ifr6.ifr_addr = *sin; 211 if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) { 212 warn("ioctl(SIOCGIFALIFETIME_IN6)"); 213 close(s6); 214 return; 215 } 216 lifetime = ifr6.ifr_ifru.ifru_lifetime; 217 close(s6); 218 219 /* XXX: embedded link local addr check */ 220 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) && 221 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) { 222 u_short index; 223 224 index = *(u_short *)&sin->sin6_addr.s6_addr[2]; 225 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0; 226 if (sin->sin6_scope_id == 0) 227 sin->sin6_scope_id = ntohs(index); 228 } 229 scopeid = sin->sin6_scope_id; 230 231 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf, 232 sizeof(addr_buf), NULL, 0, NI_NUMERICHOST); 233 if (error != 0) 234 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 235 sizeof(addr_buf)); 236 printf("\tinet6 %s ", addr_buf); 237 238 if (flags & IFF_POINTOPOINT) { 239 /* note RTAX_BRD overlap with IFF_BROADCAST */ 240 sin = (struct sockaddr_in6 *)info->rti_info[RTAX_BRD]; 241 /* 242 * some of the interfaces do not have valid destination 243 * address. 244 */ 245 if (sin && 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 *)info->rti_info[RTAX_NETMASK]; 271 if (!sin) 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 putchar('\n'); 311 } 312 313 #define SIN6(x) ((struct sockaddr_in6 *) &(x)) 314 static struct sockaddr_in6 *sin6tab[] = { 315 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr), 316 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr) 317 }; 318 319 static void 320 in6_getprefix(const char *plen, int which) 321 { 322 struct sockaddr_in6 *sin = sin6tab[which]; 323 u_char *cp; 324 int len = atoi(plen); 325 326 if ((len < 0) || (len > 128)) 327 errx(1, "%s: bad value", plen); 328 sin->sin6_len = sizeof(*sin); 329 if (which != MASK) 330 sin->sin6_family = AF_INET6; 331 if ((len == 0) || (len == 128)) { 332 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr)); 333 return; 334 } 335 memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr)); 336 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8) 337 *cp++ = 0xff; 338 *cp = 0xff << (8 - len); 339 } 340 341 static void 342 in6_getaddr(const char *s, int which) 343 { 344 struct sockaddr_in6 *sin = sin6tab[which]; 345 struct addrinfo hints, *res; 346 int error = -1; 347 348 newaddr &= 1; 349 350 sin->sin6_len = sizeof(*sin); 351 if (which != MASK) 352 sin->sin6_family = AF_INET6; 353 354 if (which == ADDR) { 355 char *p = NULL; 356 if((p = strrchr(s, '/')) != NULL) { 357 *p = '\0'; 358 in6_getprefix(p + 1, MASK); 359 explicit_prefix = 1; 360 } 361 } 362 363 if (sin->sin6_family == AF_INET6) { 364 bzero(&hints, sizeof(struct addrinfo)); 365 hints.ai_family = AF_INET6; 366 error = getaddrinfo(s, NULL, &hints, &res); 367 } 368 if (error != 0) { 369 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1) 370 errx(1, "%s: bad value", s); 371 } else 372 bcopy(res->ai_addr, sin, res->ai_addrlen); 373 } 374 375 static int 376 prefix(void *val, int size) 377 { 378 u_char *name = (u_char *)val; 379 int byte, bit, plen = 0; 380 381 for (byte = 0; byte < size; byte++, plen += 8) 382 if (name[byte] != 0xff) 383 break; 384 if (byte == size) 385 return (plen); 386 for (bit = 7; bit != 0; bit--, plen++) 387 if (!(name[byte] & (1 << bit))) 388 break; 389 for (; bit != 0; bit--) 390 if (name[byte] & (1 << bit)) 391 return(0); 392 byte++; 393 for (; byte < size; byte++) 394 if (name[byte]) 395 return(0); 396 return (plen); 397 } 398 399 static char * 400 sec2str(time_t total) 401 { 402 static char result[256]; 403 int days, hours, mins, secs; 404 int first = 1; 405 char *p = result; 406 407 if (0) { 408 days = total / 3600 / 24; 409 hours = (total / 3600) % 24; 410 mins = (total / 60) % 60; 411 secs = total % 60; 412 413 if (days) { 414 first = 0; 415 p += sprintf(p, "%dd", days); 416 } 417 if (!first || hours) { 418 first = 0; 419 p += sprintf(p, "%dh", hours); 420 } 421 if (!first || mins) { 422 first = 0; 423 p += sprintf(p, "%dm", mins); 424 } 425 sprintf(p, "%ds", secs); 426 } else 427 sprintf(result, "%lu", (unsigned long)total); 428 429 return(result); 430 } 431 432 static void 433 in6_postproc(int s, const struct afswtch *afp) 434 { 435 if (explicit_prefix == 0) { 436 /* Aggregatable address architecture defines all prefixes 437 are 64. So, it is convenient to set prefixlen to 64 if 438 it is not specified. */ 439 setifprefixlen("64", 0, s, afp); 440 /* in6_getprefix("64", MASK) if MASK is available here... */ 441 } 442 } 443 444 static void 445 in6_status_tunnel(int s) 446 { 447 char src[NI_MAXHOST]; 448 char dst[NI_MAXHOST]; 449 struct in6_ifreq in6_ifr; 450 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr; 451 452 memset(&in6_ifr, 0, sizeof(in6_ifr)); 453 strncpy(in6_ifr.ifr_name, name, IFNAMSIZ); 454 455 if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0) 456 return; 457 if (sa->sa_family != AF_INET6) 458 return; 459 in6_fillscopeid(&in6_ifr.ifr_addr); 460 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, 461 NI_NUMERICHOST) != 0) 462 src[0] = '\0'; 463 464 if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0) 465 return; 466 if (sa->sa_family != AF_INET6) 467 return; 468 in6_fillscopeid(&in6_ifr.ifr_addr); 469 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, 470 NI_NUMERICHOST) != 0) 471 dst[0] = '\0'; 472 473 printf("\ttunnel inet6 %s --> %s\n", src, dst); 474 } 475 476 static void 477 in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 478 { 479 struct in6_aliasreq in6_addreq; 480 481 memset(&in6_addreq, 0, sizeof(in6_addreq)); 482 strncpy(in6_addreq.ifra_name, name, IFNAMSIZ); 483 memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 484 memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr, 485 dstres->ai_addr->sa_len); 486 487 if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0) 488 warn("SIOCSIFPHYADDR_IN6"); 489 } 490 491 static struct cmd inet6_cmds[] = { 492 DEF_CMD_ARG("prefixlen", setifprefixlen), 493 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags), 494 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags), 495 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags), 496 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags), 497 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags), 498 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags), 499 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags), 500 DEF_CMD_ARG("pltime", setip6pltime), 501 DEF_CMD_ARG("vltime", setip6vltime), 502 DEF_CMD("eui64", 0, setip6eui64), 503 }; 504 505 static struct afswtch af_inet6 = { 506 .af_name = "inet6", 507 .af_af = AF_INET6, 508 .af_status = in6_status, 509 .af_getaddr = in6_getaddr, 510 .af_getprefix = in6_getprefix, 511 .af_postproc = in6_postproc, 512 .af_status_tunnel = in6_status_tunnel, 513 .af_settunnel = in6_set_tunnel, 514 .af_difaddr = SIOCDIFADDR_IN6, 515 .af_aifaddr = SIOCAIFADDR_IN6, 516 .af_ridreq = &in6_addreq, 517 .af_addreq = &in6_addreq, 518 }; 519 520 static void 521 in6_Lopt_cb(const char *optarg __unused) 522 { 523 ip6lifetime++; /* print IPv6 address lifetime */ 524 } 525 static struct option in6_Lopt = { "L", "[-L]", in6_Lopt_cb }; 526 527 static __constructor void 528 inet6_ctor(void) 529 { 530 #define N(a) (sizeof(a) / sizeof(a[0])) 531 int i; 532 533 for (i = 0; i < N(inet6_cmds); i++) 534 cmd_register(&inet6_cmds[i]); 535 af_register(&af_inet6); 536 opt_register(&in6_Lopt); 537 #undef N 538 } 539