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/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 <time.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 <netdb.h> 52 53 #include <netinet6/nd6.h> /* Define ND6_INFINITE_LIFETIME */ 54 55 #include "ifconfig.h" 56 57 static struct in6_ifreq in6_ridreq; 58 static struct in6_aliasreq in6_addreq = 59 { { 0 }, 60 { 0 }, 61 { 0 }, 62 { 0 }, 63 0, 64 { 0, 0, ND6_INFINITE_LIFETIME, ND6_INFINITE_LIFETIME } }; 65 static int ip6lifetime; 66 67 static void in6_fillscopeid(struct sockaddr_in6 *sin6); 68 static int prefix(void *, int); 69 static char *sec2str(time_t); 70 static int explicit_prefix = 0; 71 72 static char addr_buf[MAXHOSTNAMELEN *2 + 1]; /*for getnameinfo()*/ 73 74 static void 75 setifprefixlen(const char *addr, int dummy __unused, int s, 76 const struct afswtch *afp) 77 { 78 if (afp->af_getprefix != NULL) 79 afp->af_getprefix(addr, MASK); 80 explicit_prefix = 1; 81 } 82 83 static void 84 setip6flags(const char *dummyaddr __unused, int flag, int dummysoc __unused, 85 const struct afswtch *afp) 86 { 87 if (afp->af_af != AF_INET6) 88 err(1, "address flags can be set only for inet6 addresses"); 89 90 if (flag < 0) 91 in6_addreq.ifra_flags &= ~(-flag); 92 else 93 in6_addreq.ifra_flags |= flag; 94 } 95 96 static void 97 setip6lifetime(const char *cmd, const char *val, int s, 98 const struct afswtch *afp) 99 { 100 struct timespec now; 101 time_t newval; 102 char *ep; 103 104 clock_gettime(CLOCK_MONOTONIC_FAST, &now); 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 = now.tv_sec + newval; 112 in6_addreq.ifra_lifetime.ia6t_vltime = newval; 113 } else if (strcmp(cmd, "pltime") == 0) { 114 in6_addreq.ifra_lifetime.ia6t_preferred = now.tv_sec + 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 struct timespec now; 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 *)info->rti_info[RTAX_IFA]; 196 if (sin == NULL) 197 return; 198 199 strncpy(ifr6.ifr_name, ifr.ifr_name, sizeof(ifr.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 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf, 234 sizeof(addr_buf), NULL, 0, NI_NUMERICHOST); 235 if (error != 0) 236 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 237 sizeof(addr_buf)); 238 printf("\tinet6 %s ", addr_buf); 239 240 if (flags & IFF_POINTOPOINT) { 241 /* note RTAX_BRD overlap with IFF_BROADCAST */ 242 sin = (struct sockaddr_in6 *)info->rti_info[RTAX_BRD]; 243 /* 244 * some of the interfaces do not have valid destination 245 * address. 246 */ 247 if (sin && sin->sin6_family == AF_INET6) { 248 int error; 249 250 /* XXX: embedded link local addr check */ 251 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) && 252 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) { 253 u_short index; 254 255 index = *(u_short *)&sin->sin6_addr.s6_addr[2]; 256 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0; 257 if (sin->sin6_scope_id == 0) 258 sin->sin6_scope_id = ntohs(index); 259 } 260 261 error = getnameinfo((struct sockaddr *)sin, 262 sin->sin6_len, addr_buf, 263 sizeof(addr_buf), NULL, 0, 264 NI_NUMERICHOST); 265 if (error != 0) 266 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 267 sizeof(addr_buf)); 268 printf("--> %s ", addr_buf); 269 } 270 } 271 272 sin = (struct sockaddr_in6 *)info->rti_info[RTAX_NETMASK]; 273 if (!sin) 274 sin = &null_sin; 275 printf("prefixlen %d ", prefix(&sin->sin6_addr, 276 sizeof(struct in6_addr))); 277 278 if ((flags6 & IN6_IFF_ANYCAST) != 0) 279 printf("anycast "); 280 if ((flags6 & IN6_IFF_TENTATIVE) != 0) 281 printf("tentative "); 282 if ((flags6 & IN6_IFF_DUPLICATED) != 0) 283 printf("duplicated "); 284 if ((flags6 & IN6_IFF_DETACHED) != 0) 285 printf("detached "); 286 if ((flags6 & IN6_IFF_DEPRECATED) != 0) 287 printf("deprecated "); 288 if ((flags6 & IN6_IFF_AUTOCONF) != 0) 289 printf("autoconf "); 290 if ((flags6 & IN6_IFF_TEMPORARY) != 0) 291 printf("temporary "); 292 293 if (scopeid) 294 printf("scopeid 0x%x ", scopeid); 295 296 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) { 297 printf("pltime "); 298 if (lifetime.ia6t_preferred) { 299 printf("%s ", lifetime.ia6t_preferred < now.tv_sec 300 ? "0" : sec2str(lifetime.ia6t_preferred - now.tv_sec)); 301 } else 302 printf("infty "); 303 304 printf("vltime "); 305 if (lifetime.ia6t_expire) { 306 printf("%s ", lifetime.ia6t_expire < now.tv_sec 307 ? "0" : sec2str(lifetime.ia6t_expire - now.tv_sec)); 308 } else 309 printf("infty "); 310 } 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_ARG("pltime", setip6pltime), 503 DEF_CMD_ARG("vltime", setip6vltime), 504 DEF_CMD("eui64", 0, setip6eui64), 505 }; 506 507 static struct afswtch af_inet6 = { 508 .af_name = "inet6", 509 .af_af = AF_INET6, 510 .af_status = in6_status, 511 .af_getaddr = in6_getaddr, 512 .af_getprefix = in6_getprefix, 513 .af_postproc = in6_postproc, 514 .af_status_tunnel = in6_status_tunnel, 515 .af_settunnel = in6_set_tunnel, 516 .af_difaddr = SIOCDIFADDR_IN6, 517 .af_aifaddr = SIOCAIFADDR_IN6, 518 .af_ridreq = &in6_ridreq, 519 .af_addreq = &in6_addreq, 520 }; 521 522 static void 523 in6_Lopt_cb(const char *optarg __unused) 524 { 525 ip6lifetime++; /* print IPv6 address lifetime */ 526 } 527 static struct option in6_Lopt = { "L", "[-L]", in6_Lopt_cb }; 528 529 static __constructor(101) void 530 inet6_ctor(void) 531 { 532 #define N(a) (sizeof(a) / sizeof(a[0])) 533 int i; 534 535 for (i = 0; i < N(inet6_cmds); i++) 536 cmd_register(&inet6_cmds[i]); 537 af_register(&af_inet6); 538 opt_register(&in6_Lopt); 539 #undef N 540 } 541