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 int prefix(void *, int); 66 static char *sec2str(time_t); 67 static int explicit_prefix = 0; 68 69 extern void setnd6flags(const char *, int, int, const struct afswtch *); 70 extern void setnd6defif(const char *, int, int, const struct afswtch *); 71 extern void nd6_status(int); 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_status(int s __unused, const struct ifaddrs *ifa) 169 { 170 struct sockaddr_in6 *sin, null_sin; 171 struct in6_ifreq ifr6; 172 int s6; 173 u_int32_t flags6; 174 struct in6_addrlifetime lifetime; 175 time_t t = time(NULL); 176 int error; 177 178 memset(&null_sin, 0, sizeof(null_sin)); 179 180 sin = (struct sockaddr_in6 *)ifa->ifa_addr; 181 if (sin == NULL) 182 return; 183 184 strncpy(ifr6.ifr_name, ifr.ifr_name, sizeof(ifr.ifr_name)); 185 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 186 warn("socket(AF_INET6,SOCK_DGRAM)"); 187 return; 188 } 189 ifr6.ifr_addr = *sin; 190 if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) { 191 warn("ioctl(SIOCGIFAFLAG_IN6)"); 192 close(s6); 193 return; 194 } 195 flags6 = ifr6.ifr_ifru.ifru_flags6; 196 memset(&lifetime, 0, sizeof(lifetime)); 197 ifr6.ifr_addr = *sin; 198 if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) { 199 warn("ioctl(SIOCGIFALIFETIME_IN6)"); 200 close(s6); 201 return; 202 } 203 lifetime = ifr6.ifr_ifru.ifru_lifetime; 204 close(s6); 205 206 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf, 207 sizeof(addr_buf), NULL, 0, NI_NUMERICHOST); 208 if (error != 0) 209 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 210 sizeof(addr_buf)); 211 printf("\tinet6 %s ", addr_buf); 212 213 if (ifa->ifa_flags & IFF_POINTOPOINT) { 214 sin = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 215 /* 216 * some of the interfaces do not have valid destination 217 * address. 218 */ 219 if (sin != NULL && sin->sin6_family == AF_INET6) { 220 int error; 221 222 error = getnameinfo((struct sockaddr *)sin, 223 sin->sin6_len, addr_buf, 224 sizeof(addr_buf), NULL, 0, 225 NI_NUMERICHOST); 226 if (error != 0) 227 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 228 sizeof(addr_buf)); 229 printf("--> %s ", addr_buf); 230 } 231 } 232 233 sin = (struct sockaddr_in6 *)ifa->ifa_netmask; 234 if (sin == NULL) 235 sin = &null_sin; 236 printf("prefixlen %d ", prefix(&sin->sin6_addr, 237 sizeof(struct in6_addr))); 238 239 if ((flags6 & IN6_IFF_ANYCAST) != 0) 240 printf("anycast "); 241 if ((flags6 & IN6_IFF_TENTATIVE) != 0) 242 printf("tentative "); 243 if ((flags6 & IN6_IFF_DUPLICATED) != 0) 244 printf("duplicated "); 245 if ((flags6 & IN6_IFF_DETACHED) != 0) 246 printf("detached "); 247 if ((flags6 & IN6_IFF_DEPRECATED) != 0) 248 printf("deprecated "); 249 if ((flags6 & IN6_IFF_AUTOCONF) != 0) 250 printf("autoconf "); 251 if ((flags6 & IN6_IFF_TEMPORARY) != 0) 252 printf("temporary "); 253 254 if (sin->sin6_scope_id) 255 printf("scopeid 0x%x ", sin->sin6_scope_id); 256 257 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) { 258 printf("pltime "); 259 if (lifetime.ia6t_preferred) { 260 printf("%s ", lifetime.ia6t_preferred < t 261 ? "0" : sec2str(lifetime.ia6t_preferred - t)); 262 } else 263 printf("infty "); 264 265 printf("vltime "); 266 if (lifetime.ia6t_expire) { 267 printf("%s ", lifetime.ia6t_expire < t 268 ? "0" : sec2str(lifetime.ia6t_expire - t)); 269 } else 270 printf("infty "); 271 } 272 273 print_vhid(ifa, " "); 274 275 putchar('\n'); 276 } 277 278 #define SIN6(x) ((struct sockaddr_in6 *) &(x)) 279 static struct sockaddr_in6 *sin6tab[] = { 280 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr), 281 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr) 282 }; 283 284 static void 285 in6_getprefix(const char *plen, int which) 286 { 287 struct sockaddr_in6 *sin = sin6tab[which]; 288 u_char *cp; 289 int len = atoi(plen); 290 291 if ((len < 0) || (len > 128)) 292 errx(1, "%s: bad value", plen); 293 sin->sin6_len = sizeof(*sin); 294 if (which != MASK) 295 sin->sin6_family = AF_INET6; 296 if ((len == 0) || (len == 128)) { 297 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr)); 298 return; 299 } 300 memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr)); 301 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8) 302 *cp++ = 0xff; 303 *cp = 0xff << (8 - len); 304 } 305 306 static void 307 in6_getaddr(const char *s, int which) 308 { 309 struct sockaddr_in6 *sin = sin6tab[which]; 310 struct addrinfo hints, *res; 311 int error = -1; 312 313 newaddr &= 1; 314 315 sin->sin6_len = sizeof(*sin); 316 if (which != MASK) 317 sin->sin6_family = AF_INET6; 318 319 if (which == ADDR) { 320 char *p = NULL; 321 if((p = strrchr(s, '/')) != NULL) { 322 *p = '\0'; 323 in6_getprefix(p + 1, MASK); 324 explicit_prefix = 1; 325 } 326 } 327 328 if (sin->sin6_family == AF_INET6) { 329 bzero(&hints, sizeof(struct addrinfo)); 330 hints.ai_family = AF_INET6; 331 error = getaddrinfo(s, NULL, &hints, &res); 332 } 333 if (error != 0) { 334 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1) 335 errx(1, "%s: bad value", s); 336 } else 337 bcopy(res->ai_addr, sin, res->ai_addrlen); 338 } 339 340 static int 341 prefix(void *val, int size) 342 { 343 u_char *name = (u_char *)val; 344 int byte, bit, plen = 0; 345 346 for (byte = 0; byte < size; byte++, plen += 8) 347 if (name[byte] != 0xff) 348 break; 349 if (byte == size) 350 return (plen); 351 for (bit = 7; bit != 0; bit--, plen++) 352 if (!(name[byte] & (1 << bit))) 353 break; 354 for (; bit != 0; bit--) 355 if (name[byte] & (1 << bit)) 356 return(0); 357 byte++; 358 for (; byte < size; byte++) 359 if (name[byte]) 360 return(0); 361 return (plen); 362 } 363 364 static char * 365 sec2str(time_t total) 366 { 367 static char result[256]; 368 int days, hours, mins, secs; 369 int first = 1; 370 char *p = result; 371 372 if (0) { 373 days = total / 3600 / 24; 374 hours = (total / 3600) % 24; 375 mins = (total / 60) % 60; 376 secs = total % 60; 377 378 if (days) { 379 first = 0; 380 p += sprintf(p, "%dd", days); 381 } 382 if (!first || hours) { 383 first = 0; 384 p += sprintf(p, "%dh", hours); 385 } 386 if (!first || mins) { 387 first = 0; 388 p += sprintf(p, "%dm", mins); 389 } 390 sprintf(p, "%ds", secs); 391 } else 392 sprintf(result, "%lu", (unsigned long)total); 393 394 return(result); 395 } 396 397 static void 398 in6_postproc(int s, const struct afswtch *afp) 399 { 400 if (explicit_prefix == 0) { 401 /* Aggregatable address architecture defines all prefixes 402 are 64. So, it is convenient to set prefixlen to 64 if 403 it is not specified. */ 404 setifprefixlen("64", 0, s, afp); 405 /* in6_getprefix("64", MASK) if MASK is available here... */ 406 } 407 } 408 409 static void 410 in6_status_tunnel(int s) 411 { 412 char src[NI_MAXHOST]; 413 char dst[NI_MAXHOST]; 414 struct in6_ifreq in6_ifr; 415 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr; 416 417 memset(&in6_ifr, 0, sizeof(in6_ifr)); 418 strncpy(in6_ifr.ifr_name, name, IFNAMSIZ); 419 420 if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0) 421 return; 422 if (sa->sa_family != AF_INET6) 423 return; 424 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, 425 NI_NUMERICHOST) != 0) 426 src[0] = '\0'; 427 428 if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0) 429 return; 430 if (sa->sa_family != AF_INET6) 431 return; 432 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, 433 NI_NUMERICHOST) != 0) 434 dst[0] = '\0'; 435 436 printf("\ttunnel inet6 %s --> %s\n", src, dst); 437 } 438 439 static void 440 in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 441 { 442 struct in6_aliasreq in6_addreq; 443 444 memset(&in6_addreq, 0, sizeof(in6_addreq)); 445 strncpy(in6_addreq.ifra_name, name, IFNAMSIZ); 446 memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 447 memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr, 448 dstres->ai_addr->sa_len); 449 450 if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0) 451 warn("SIOCSIFPHYADDR_IN6"); 452 } 453 454 static struct cmd inet6_cmds[] = { 455 DEF_CMD_ARG("prefixlen", setifprefixlen), 456 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags), 457 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags), 458 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags), 459 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags), 460 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags), 461 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags), 462 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags), 463 DEF_CMD("accept_rtadv", ND6_IFF_ACCEPT_RTADV, setnd6flags), 464 DEF_CMD("-accept_rtadv",-ND6_IFF_ACCEPT_RTADV, setnd6flags), 465 DEF_CMD("no_radr", ND6_IFF_NO_RADR, setnd6flags), 466 DEF_CMD("-no_radr", -ND6_IFF_NO_RADR, setnd6flags), 467 DEF_CMD("defaultif", 1, setnd6defif), 468 DEF_CMD("-defaultif", -1, setnd6defif), 469 DEF_CMD("ifdisabled", ND6_IFF_IFDISABLED, setnd6flags), 470 DEF_CMD("-ifdisabled", -ND6_IFF_IFDISABLED, setnd6flags), 471 DEF_CMD("nud", ND6_IFF_PERFORMNUD, setnd6flags), 472 DEF_CMD("-nud", -ND6_IFF_PERFORMNUD, setnd6flags), 473 DEF_CMD("auto_linklocal",ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 474 DEF_CMD("-auto_linklocal",-ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 475 DEF_CMD_ARG("pltime", setip6pltime), 476 DEF_CMD_ARG("vltime", setip6vltime), 477 DEF_CMD("eui64", 0, setip6eui64), 478 }; 479 480 static struct afswtch af_inet6 = { 481 .af_name = "inet6", 482 .af_af = AF_INET6, 483 .af_status = in6_status, 484 .af_getaddr = in6_getaddr, 485 .af_getprefix = in6_getprefix, 486 .af_other_status = nd6_status, 487 .af_postproc = in6_postproc, 488 .af_status_tunnel = in6_status_tunnel, 489 .af_settunnel = in6_set_tunnel, 490 .af_difaddr = SIOCDIFADDR_IN6, 491 .af_aifaddr = SIOCAIFADDR_IN6, 492 .af_ridreq = &in6_addreq, 493 .af_addreq = &in6_addreq, 494 }; 495 496 static void 497 in6_Lopt_cb(const char *optarg __unused) 498 { 499 ip6lifetime++; /* print IPv6 address lifetime */ 500 } 501 static struct option in6_Lopt = { .opt = "L", .opt_usage = "[-L]", .cb = in6_Lopt_cb }; 502 503 static __constructor void 504 inet6_ctor(void) 505 { 506 #define N(a) (sizeof(a) / sizeof(a[0])) 507 size_t i; 508 509 #ifndef RESCUE 510 if (!feature_present("inet6")) 511 return; 512 #endif 513 514 for (i = 0; i < N(inet6_cmds); i++) 515 cmd_register(&inet6_cmds[i]); 516 af_register(&af_inet6); 517 opt_register(&in6_Lopt); 518 #undef N 519 } 520