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 <net/route.h> /* for RTX_IFA */ 38 #include <netinet/in.h> 39 #include <netinet/in_var.h> 40 #include <netinet6/nd6.h> /* Define ND6_INFINITE_LIFETIME */ 41 #include <arpa/inet.h> 42 #include <netdb.h> 43 44 #include <err.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 #include <time.h> 50 #include <ifaddrs.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[MAXHOSTNAMELEN *2 + 1]; /*for getnameinfo()*/ 70 71 static void 72 setifprefixlen(const char *addr, int dummy __unused, int s, 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 *dummyaddr __unused, int flag, int dummysoc __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, 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, 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, name) == 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 #endif 174 } 175 176 static void 177 in6_status(int s __unused, const struct rt_addrinfo * info) 178 { 179 struct sockaddr_in6 *sin, null_sin; 180 struct in6_ifreq ifr6; 181 int s6; 182 u_int32_t flags6; 183 struct in6_addrlifetime lifetime; 184 struct timespec now; 185 int error; 186 u_int32_t scopeid; 187 188 clock_gettime(CLOCK_MONOTONIC_FAST, &now); 189 190 memset(&null_sin, 0, sizeof(null_sin)); 191 192 sin = (struct sockaddr_in6 *)info->rti_info[RTAX_IFA]; 193 if (sin == NULL) 194 return; 195 196 strlcpy(ifr6.ifr_name, ifr.ifr_name, IFNAMSIZ); 197 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 198 warn("socket(AF_INET6,SOCK_DGRAM)"); 199 return; 200 } 201 ifr6.ifr_addr = *sin; 202 if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) { 203 warn("ioctl(SIOCGIFAFLAG_IN6)"); 204 close(s6); 205 return; 206 } 207 flags6 = ifr6.ifr_ifru.ifru_flags6; 208 memset(&lifetime, 0, sizeof(lifetime)); 209 ifr6.ifr_addr = *sin; 210 if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) { 211 warn("ioctl(SIOCGIFALIFETIME_IN6)"); 212 close(s6); 213 return; 214 } 215 lifetime = ifr6.ifr_ifru.ifru_lifetime; 216 close(s6); 217 218 /* XXX: embedded link local addr check */ 219 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) && 220 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) { 221 u_short index; 222 223 index = *(u_short *)&sin->sin6_addr.s6_addr[2]; 224 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0; 225 if (sin->sin6_scope_id == 0) 226 sin->sin6_scope_id = ntohs(index); 227 } 228 scopeid = sin->sin6_scope_id; 229 230 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf, 231 sizeof(addr_buf), NULL, 0, NI_NUMERICHOST); 232 if (error != 0) 233 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 234 sizeof(addr_buf)); 235 printf("\tinet6 %s ", addr_buf); 236 237 if (flags & IFF_POINTOPOINT) { 238 /* note RTAX_BRD overlap with IFF_BROADCAST */ 239 sin = (struct sockaddr_in6 *)info->rti_info[RTAX_BRD]; 240 /* 241 * some of the interfaces do not have valid destination 242 * address. 243 */ 244 if (sin && sin->sin6_family == AF_INET6) { 245 int error; 246 247 /* XXX: embedded link local addr check */ 248 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) && 249 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) { 250 u_short index; 251 252 index = *(u_short *)&sin->sin6_addr.s6_addr[2]; 253 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0; 254 if (sin->sin6_scope_id == 0) 255 sin->sin6_scope_id = ntohs(index); 256 } 257 258 error = getnameinfo((struct sockaddr *)sin, 259 sin->sin6_len, addr_buf, 260 sizeof(addr_buf), NULL, 0, 261 NI_NUMERICHOST); 262 if (error != 0) 263 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 264 sizeof(addr_buf)); 265 printf("--> %s ", addr_buf); 266 } 267 } 268 269 sin = (struct sockaddr_in6 *)info->rti_info[RTAX_NETMASK]; 270 if (!sin) 271 sin = &null_sin; 272 printf("prefixlen %d ", prefix(&sin->sin6_addr, 273 sizeof(struct in6_addr))); 274 275 if ((flags6 & IN6_IFF_ANYCAST) != 0) 276 printf("anycast "); 277 if ((flags6 & IN6_IFF_TENTATIVE) != 0) 278 printf("tentative "); 279 if ((flags6 & IN6_IFF_DUPLICATED) != 0) 280 printf("duplicated "); 281 if ((flags6 & IN6_IFF_DETACHED) != 0) 282 printf("detached "); 283 if ((flags6 & IN6_IFF_DEPRECATED) != 0) 284 printf("deprecated "); 285 if ((flags6 & IN6_IFF_AUTOCONF) != 0) 286 printf("autoconf "); 287 if ((flags6 & IN6_IFF_TEMPORARY) != 0) 288 printf("temporary "); 289 290 if (scopeid) 291 printf("scopeid 0x%x ", scopeid); 292 293 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) { 294 printf("pltime "); 295 if (lifetime.ia6t_preferred) { 296 printf("%s ", lifetime.ia6t_preferred < now.tv_sec 297 ? "0" : sec2str(lifetime.ia6t_preferred - now.tv_sec)); 298 } else 299 printf("infty "); 300 301 printf("vltime "); 302 if (lifetime.ia6t_expire) { 303 printf("%s ", lifetime.ia6t_expire < now.tv_sec 304 ? "0" : sec2str(lifetime.ia6t_expire - now.tv_sec)); 305 } else 306 printf("infty "); 307 } 308 309 putchar('\n'); 310 } 311 312 #define SIN6(x) ((struct sockaddr_in6 *) &(x)) 313 static struct sockaddr_in6 *sin6tab[] = { 314 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr), 315 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr) 316 }; 317 318 static void 319 in6_getprefix(const char *plen, int which) 320 { 321 struct sockaddr_in6 *sin = sin6tab[which]; 322 u_char *cp; 323 int len = atoi(plen); 324 325 if ((len < 0) || (len > 128)) 326 errx(1, "%s: bad value", plen); 327 sin->sin6_len = sizeof(*sin); 328 if (which != MASK) 329 sin->sin6_family = AF_INET6; 330 if ((len == 0) || (len == 128)) { 331 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr)); 332 return; 333 } 334 memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr)); 335 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8) 336 *cp++ = 0xff; 337 *cp = 0xff << (8 - len); 338 } 339 340 static void 341 in6_getaddr(const char *s, int which) 342 { 343 struct sockaddr_in6 *sin = sin6tab[which]; 344 struct addrinfo hints, *res; 345 int error = -1; 346 347 newaddr &= 1; 348 349 sin->sin6_len = sizeof(*sin); 350 if (which != MASK) 351 sin->sin6_family = AF_INET6; 352 353 if (which == ADDR) { 354 char *p = NULL; 355 if((p = strrchr(s, '/')) != NULL) { 356 *p = '\0'; 357 in6_getprefix(p + 1, MASK); 358 explicit_prefix = 1; 359 } 360 } 361 362 if (sin->sin6_family == AF_INET6) { 363 bzero(&hints, sizeof(struct addrinfo)); 364 hints.ai_family = AF_INET6; 365 error = getaddrinfo(s, NULL, &hints, &res); 366 } 367 if (error != 0) { 368 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1) 369 errx(1, "%s: bad value", s); 370 } else 371 bcopy(res->ai_addr, sin, res->ai_addrlen); 372 } 373 374 static int 375 prefix(void *val, int size) 376 { 377 u_char *name = (u_char *)val; 378 int byte, bit, plen = 0; 379 380 for (byte = 0; byte < size; byte++, plen += 8) 381 if (name[byte] != 0xff) 382 break; 383 if (byte == size) 384 return (plen); 385 for (bit = 7; bit != 0; bit--, plen++) 386 if (!(name[byte] & (1 << bit))) 387 break; 388 for (; bit != 0; bit--) 389 if (name[byte] & (1 << bit)) 390 return(0); 391 byte++; 392 for (; byte < size; byte++) 393 if (name[byte]) 394 return(0); 395 return (plen); 396 } 397 398 static char * 399 sec2str(time_t total) 400 { 401 static char result[256]; 402 int days, hours, mins, secs; 403 int first = 1; 404 char *p = result; 405 406 if (0) { 407 days = total / 3600 / 24; 408 hours = (total / 3600) % 24; 409 mins = (total / 60) % 60; 410 secs = total % 60; 411 412 if (days) { 413 first = 0; 414 p += sprintf(p, "%dd", days); 415 } 416 if (!first || hours) { 417 first = 0; 418 p += sprintf(p, "%dh", hours); 419 } 420 if (!first || mins) { 421 first = 0; 422 p += sprintf(p, "%dm", mins); 423 } 424 sprintf(p, "%ds", secs); 425 } else 426 sprintf(result, "%lu", (unsigned long)total); 427 428 return(result); 429 } 430 431 static void 432 in6_postproc(int s, const struct afswtch *afp) 433 { 434 if (explicit_prefix == 0) { 435 /* Aggregatable address architecture defines all prefixes 436 are 64. So, it is convenient to set prefixlen to 64 if 437 it is not specified. */ 438 setifprefixlen("64", 0, s, afp); 439 /* in6_getprefix("64", MASK) if MASK is available here... */ 440 } 441 } 442 443 static void 444 in6_status_tunnel(int s) 445 { 446 char src[NI_MAXHOST]; 447 char dst[NI_MAXHOST]; 448 struct in6_ifreq in6_ifr; 449 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr; 450 451 memset(&in6_ifr, 0, sizeof(in6_ifr)); 452 strlcpy(in6_ifr.ifr_name, name, IFNAMSIZ); 453 454 if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0) 455 return; 456 if (sa->sa_family != AF_INET6) 457 return; 458 in6_fillscopeid(&in6_ifr.ifr_addr); 459 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, 460 NI_NUMERICHOST) != 0) 461 src[0] = '\0'; 462 463 if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0) 464 return; 465 if (sa->sa_family != AF_INET6) 466 return; 467 in6_fillscopeid(&in6_ifr.ifr_addr); 468 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, 469 NI_NUMERICHOST) != 0) 470 dst[0] = '\0'; 471 472 printf("\ttunnel inet6 %s --> %s\n", src, dst); 473 } 474 475 static void 476 in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 477 { 478 struct in6_aliasreq in6_addreq; 479 480 memset(&in6_addreq, 0, sizeof(in6_addreq)); 481 strlcpy(in6_addreq.ifra_name, name, IFNAMSIZ); 482 memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 483 memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr, 484 dstres->ai_addr->sa_len); 485 486 if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0) 487 warn("SIOCSIFPHYADDR_IN6"); 488 } 489 490 static struct cmd inet6_cmds[] = { 491 DEF_CMD_ARG("prefixlen", setifprefixlen), 492 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags), 493 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags), 494 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags), 495 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags), 496 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags), 497 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags), 498 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags), 499 DEF_CMD_ARG("pltime", setip6pltime), 500 DEF_CMD_ARG("vltime", setip6vltime), 501 DEF_CMD("eui64", 0, setip6eui64), 502 }; 503 504 static struct afswtch af_inet6 = { 505 .af_name = "inet6", 506 .af_af = AF_INET6, 507 .af_status = in6_status, 508 .af_getaddr = in6_getaddr, 509 .af_getprefix = in6_getprefix, 510 .af_postproc = in6_postproc, 511 .af_status_tunnel = in6_status_tunnel, 512 .af_settunnel = in6_set_tunnel, 513 .af_difaddr = SIOCDIFADDR_IN6, 514 .af_aifaddr = SIOCAIFADDR_IN6, 515 .af_ridreq = &in6_ridreq, 516 .af_addreq = &in6_addreq, 517 }; 518 519 static void 520 in6_Lopt_cb(const char *optarg __unused) 521 { 522 ip6lifetime++; /* print IPv6 address lifetime */ 523 } 524 static struct option in6_Lopt = { "L", "[-L]", in6_Lopt_cb, NULL }; 525 526 static __constructor(101) void 527 inet6_ctor(void) 528 { 529 size_t i; 530 531 for (i = 0; i < nitems(inet6_cmds); i++) 532 cmd_register(&inet6_cmds[i]); 533 af_register(&af_inet6); 534 opt_register(&in6_Lopt); 535 } 536