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 <time.h> 46 #include <ifaddrs.h> 47 48 #include <arpa/inet.h> 49 50 #include <netinet/in.h> 51 #include <net/if_var.h> /* for struct ifaddr */ 52 #include <netinet/in_var.h> 53 #include <arpa/inet.h> 54 #include <netdb.h> 55 56 #include <netinet6/nd6.h> /* Define ND6_INFINITE_LIFETIME */ 57 58 #include "ifconfig.h" 59 60 static struct in6_ifreq in6_ridreq; 61 static struct in6_aliasreq in6_addreq = 62 { .ifra_flags = 0, 63 .ifra_lifetime = { 0, 0, ND6_INFINITE_LIFETIME, ND6_INFINITE_LIFETIME } }; 64 static int ip6lifetime; 65 66 static int prefix(void *, int); 67 static char *sec2str(time_t); 68 static int explicit_prefix = 0; 69 70 extern void setnd6flags(const char *, int, int, const struct afswtch *); 71 extern void setnd6defif(const char *, int, int, const struct afswtch *); 72 extern void nd6_status(int); 73 74 static char addr_buf[MAXHOSTNAMELEN *2 + 1]; /*for getnameinfo()*/ 75 76 static void 77 setifprefixlen(const char *addr, int dummy __unused, int s, 78 const struct afswtch *afp) 79 { 80 if (afp->af_getprefix != NULL) 81 afp->af_getprefix(addr, MASK); 82 explicit_prefix = 1; 83 } 84 85 static void 86 setip6flags(const char *dummyaddr __unused, int flag, int dummysoc __unused, 87 const struct afswtch *afp) 88 { 89 if (afp->af_af != AF_INET6) 90 err(1, "address flags can be set only for inet6 addresses"); 91 92 if (flag < 0) 93 in6_addreq.ifra_flags &= ~(-flag); 94 else 95 in6_addreq.ifra_flags |= flag; 96 } 97 98 static void 99 setip6lifetime(const char *cmd, const char *val, int s, 100 const struct afswtch *afp) 101 { 102 struct timespec now; 103 time_t newval; 104 char *ep; 105 106 clock_gettime(CLOCK_MONOTONIC_FAST, &now); 107 newval = (time_t)strtoul(val, &ep, 0); 108 if (val == ep) 109 errx(1, "invalid %s", cmd); 110 if (afp->af_af != AF_INET6) 111 errx(1, "%s not allowed for the AF", cmd); 112 if (strcmp(cmd, "vltime") == 0) { 113 in6_addreq.ifra_lifetime.ia6t_expire = now.tv_sec + newval; 114 in6_addreq.ifra_lifetime.ia6t_vltime = newval; 115 } else if (strcmp(cmd, "pltime") == 0) { 116 in6_addreq.ifra_lifetime.ia6t_preferred = now.tv_sec + newval; 117 in6_addreq.ifra_lifetime.ia6t_pltime = newval; 118 } 119 } 120 121 static void 122 setip6pltime(const char *seconds, int dummy __unused, int s, 123 const struct afswtch *afp) 124 { 125 setip6lifetime("pltime", seconds, s, afp); 126 } 127 128 static void 129 setip6vltime(const char *seconds, int dummy __unused, int s, 130 const struct afswtch *afp) 131 { 132 setip6lifetime("vltime", seconds, s, afp); 133 } 134 135 static void 136 setip6eui64(const char *cmd, int dummy __unused, int s, 137 const struct afswtch *afp) 138 { 139 struct ifaddrs *ifap, *ifa; 140 const struct sockaddr_in6 *sin6 = NULL; 141 const struct in6_addr *lladdr = NULL; 142 struct in6_addr *in6; 143 144 if (afp->af_af != AF_INET6) 145 errx(EXIT_FAILURE, "%s not allowed for the AF", cmd); 146 in6 = (struct in6_addr *)&in6_addreq.ifra_addr.sin6_addr; 147 if (memcmp(&in6addr_any.s6_addr[8], &in6->s6_addr[8], 8) != 0) 148 errx(EXIT_FAILURE, "interface index is already filled"); 149 if (getifaddrs(&ifap) != 0) 150 err(EXIT_FAILURE, "getifaddrs"); 151 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 152 if (ifa->ifa_addr->sa_family == AF_INET6 && 153 strcmp(ifa->ifa_name, name) == 0) { 154 sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr; 155 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 156 lladdr = &sin6->sin6_addr; 157 break; 158 } 159 } 160 } 161 if (!lladdr) 162 errx(EXIT_FAILURE, "could not determine link local address"); 163 164 memcpy(&in6->s6_addr[8], &lladdr->s6_addr[8], 8); 165 166 freeifaddrs(ifap); 167 } 168 169 static void 170 in6_status(int s __unused, const struct ifaddrs *ifa) 171 { 172 struct sockaddr_in6 *sin, null_sin; 173 struct in6_ifreq ifr6; 174 int s6; 175 u_int32_t flags6; 176 struct in6_addrlifetime lifetime; 177 struct timespec now; 178 int error; 179 180 clock_gettime(CLOCK_MONOTONIC_FAST, &now); 181 182 memset(&null_sin, 0, sizeof(null_sin)); 183 184 sin = (struct sockaddr_in6 *)ifa->ifa_addr; 185 if (sin == NULL) 186 return; 187 188 strncpy(ifr6.ifr_name, ifr.ifr_name, sizeof(ifr.ifr_name)); 189 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 190 warn("socket(AF_INET6,SOCK_DGRAM)"); 191 return; 192 } 193 ifr6.ifr_addr = *sin; 194 if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) { 195 warn("ioctl(SIOCGIFAFLAG_IN6)"); 196 close(s6); 197 return; 198 } 199 flags6 = ifr6.ifr_ifru.ifru_flags6; 200 memset(&lifetime, 0, sizeof(lifetime)); 201 ifr6.ifr_addr = *sin; 202 if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) { 203 warn("ioctl(SIOCGIFALIFETIME_IN6)"); 204 close(s6); 205 return; 206 } 207 lifetime = ifr6.ifr_ifru.ifru_lifetime; 208 close(s6); 209 210 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf, 211 sizeof(addr_buf), NULL, 0, NI_NUMERICHOST); 212 if (error != 0) 213 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 214 sizeof(addr_buf)); 215 printf("\tinet6 %s ", addr_buf); 216 217 if (ifa->ifa_flags & IFF_POINTOPOINT) { 218 sin = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 219 /* 220 * some of the interfaces do not have valid destination 221 * address. 222 */ 223 if (sin != NULL && sin->sin6_family == AF_INET6) { 224 int error; 225 226 error = getnameinfo((struct sockaddr *)sin, 227 sin->sin6_len, addr_buf, 228 sizeof(addr_buf), NULL, 0, 229 NI_NUMERICHOST); 230 if (error != 0) 231 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 232 sizeof(addr_buf)); 233 printf("--> %s ", addr_buf); 234 } 235 } 236 237 sin = (struct sockaddr_in6 *)ifa->ifa_netmask; 238 if (sin == NULL) 239 sin = &null_sin; 240 printf("prefixlen %d ", prefix(&sin->sin6_addr, 241 sizeof(struct in6_addr))); 242 243 if ((flags6 & IN6_IFF_ANYCAST) != 0) 244 printf("anycast "); 245 if ((flags6 & IN6_IFF_TENTATIVE) != 0) 246 printf("tentative "); 247 if ((flags6 & IN6_IFF_DUPLICATED) != 0) 248 printf("duplicated "); 249 if ((flags6 & IN6_IFF_DETACHED) != 0) 250 printf("detached "); 251 if ((flags6 & IN6_IFF_DEPRECATED) != 0) 252 printf("deprecated "); 253 if ((flags6 & IN6_IFF_AUTOCONF) != 0) 254 printf("autoconf "); 255 if ((flags6 & IN6_IFF_TEMPORARY) != 0) 256 printf("temporary "); 257 258 if (((struct sockaddr_in6 *)(ifa->ifa_addr))->sin6_scope_id) 259 printf("scopeid 0x%x ", 260 ((struct sockaddr_in6 *)(ifa->ifa_addr))->sin6_scope_id); 261 262 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) { 263 printf("pltime "); 264 if (lifetime.ia6t_preferred) { 265 printf("%s ", lifetime.ia6t_preferred < now.tv_sec 266 ? "0" : sec2str(lifetime.ia6t_preferred - now.tv_sec)); 267 } else 268 printf("infty "); 269 270 printf("vltime "); 271 if (lifetime.ia6t_expire) { 272 printf("%s ", lifetime.ia6t_expire < now.tv_sec 273 ? "0" : sec2str(lifetime.ia6t_expire - now.tv_sec)); 274 } else 275 printf("infty "); 276 } 277 278 print_vhid(ifa, " "); 279 280 putchar('\n'); 281 } 282 283 #define SIN6(x) ((struct sockaddr_in6 *) &(x)) 284 static struct sockaddr_in6 *sin6tab[] = { 285 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr), 286 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr) 287 }; 288 289 static void 290 in6_getprefix(const char *plen, int which) 291 { 292 struct sockaddr_in6 *sin = sin6tab[which]; 293 u_char *cp; 294 int len = atoi(plen); 295 296 if ((len < 0) || (len > 128)) 297 errx(1, "%s: bad value", plen); 298 sin->sin6_len = sizeof(*sin); 299 if (which != MASK) 300 sin->sin6_family = AF_INET6; 301 if ((len == 0) || (len == 128)) { 302 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr)); 303 return; 304 } 305 memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr)); 306 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8) 307 *cp++ = 0xff; 308 *cp = 0xff << (8 - len); 309 } 310 311 static void 312 in6_getaddr(const char *s, int which) 313 { 314 struct sockaddr_in6 *sin = sin6tab[which]; 315 struct addrinfo hints, *res; 316 int error = -1; 317 318 newaddr &= 1; 319 320 sin->sin6_len = sizeof(*sin); 321 if (which != MASK) 322 sin->sin6_family = AF_INET6; 323 324 if (which == ADDR) { 325 char *p = NULL; 326 if((p = strrchr(s, '/')) != NULL) { 327 *p = '\0'; 328 in6_getprefix(p + 1, MASK); 329 explicit_prefix = 1; 330 } 331 } 332 333 if (sin->sin6_family == AF_INET6) { 334 bzero(&hints, sizeof(struct addrinfo)); 335 hints.ai_family = AF_INET6; 336 error = getaddrinfo(s, NULL, &hints, &res); 337 } 338 if (error != 0) { 339 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1) 340 errx(1, "%s: bad value", s); 341 } else 342 bcopy(res->ai_addr, sin, res->ai_addrlen); 343 } 344 345 static int 346 prefix(void *val, int size) 347 { 348 u_char *name = (u_char *)val; 349 int byte, bit, plen = 0; 350 351 for (byte = 0; byte < size; byte++, plen += 8) 352 if (name[byte] != 0xff) 353 break; 354 if (byte == size) 355 return (plen); 356 for (bit = 7; bit != 0; bit--, plen++) 357 if (!(name[byte] & (1 << bit))) 358 break; 359 for (; bit != 0; bit--) 360 if (name[byte] & (1 << bit)) 361 return(0); 362 byte++; 363 for (; byte < size; byte++) 364 if (name[byte]) 365 return(0); 366 return (plen); 367 } 368 369 static char * 370 sec2str(time_t total) 371 { 372 static char result[256]; 373 int days, hours, mins, secs; 374 int first = 1; 375 char *p = result; 376 377 if (0) { 378 days = total / 3600 / 24; 379 hours = (total / 3600) % 24; 380 mins = (total / 60) % 60; 381 secs = total % 60; 382 383 if (days) { 384 first = 0; 385 p += sprintf(p, "%dd", days); 386 } 387 if (!first || hours) { 388 first = 0; 389 p += sprintf(p, "%dh", hours); 390 } 391 if (!first || mins) { 392 first = 0; 393 p += sprintf(p, "%dm", mins); 394 } 395 sprintf(p, "%ds", secs); 396 } else 397 sprintf(result, "%lu", (unsigned long)total); 398 399 return(result); 400 } 401 402 static void 403 in6_postproc(int s, const struct afswtch *afp) 404 { 405 if (explicit_prefix == 0) { 406 /* Aggregatable address architecture defines all prefixes 407 are 64. So, it is convenient to set prefixlen to 64 if 408 it is not specified. */ 409 setifprefixlen("64", 0, s, afp); 410 /* in6_getprefix("64", MASK) if MASK is available here... */ 411 } 412 } 413 414 static void 415 in6_status_tunnel(int s) 416 { 417 char src[NI_MAXHOST]; 418 char dst[NI_MAXHOST]; 419 struct in6_ifreq in6_ifr; 420 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr; 421 422 memset(&in6_ifr, 0, sizeof(in6_ifr)); 423 strncpy(in6_ifr.ifr_name, name, IFNAMSIZ); 424 425 if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0) 426 return; 427 if (sa->sa_family != AF_INET6) 428 return; 429 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, 430 NI_NUMERICHOST) != 0) 431 src[0] = '\0'; 432 433 if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0) 434 return; 435 if (sa->sa_family != AF_INET6) 436 return; 437 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, 438 NI_NUMERICHOST) != 0) 439 dst[0] = '\0'; 440 441 printf("\ttunnel inet6 %s --> %s\n", src, dst); 442 } 443 444 static void 445 in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 446 { 447 struct in6_aliasreq in6_addreq; 448 449 memset(&in6_addreq, 0, sizeof(in6_addreq)); 450 strncpy(in6_addreq.ifra_name, name, IFNAMSIZ); 451 memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 452 memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr, 453 dstres->ai_addr->sa_len); 454 455 if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0) 456 warn("SIOCSIFPHYADDR_IN6"); 457 } 458 459 static struct cmd inet6_cmds[] = { 460 DEF_CMD_ARG("prefixlen", setifprefixlen), 461 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags), 462 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags), 463 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags), 464 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags), 465 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags), 466 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags), 467 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags), 468 DEF_CMD("accept_rtadv", ND6_IFF_ACCEPT_RTADV, setnd6flags), 469 DEF_CMD("-accept_rtadv",-ND6_IFF_ACCEPT_RTADV, setnd6flags), 470 DEF_CMD("no_radr", ND6_IFF_NO_RADR, setnd6flags), 471 DEF_CMD("-no_radr", -ND6_IFF_NO_RADR, setnd6flags), 472 DEF_CMD("defaultif", 1, setnd6defif), 473 DEF_CMD("-defaultif", -1, setnd6defif), 474 DEF_CMD("ifdisabled", ND6_IFF_IFDISABLED, setnd6flags), 475 DEF_CMD("-ifdisabled", -ND6_IFF_IFDISABLED, setnd6flags), 476 DEF_CMD("nud", ND6_IFF_PERFORMNUD, setnd6flags), 477 DEF_CMD("-nud", -ND6_IFF_PERFORMNUD, setnd6flags), 478 DEF_CMD("auto_linklocal",ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 479 DEF_CMD("-auto_linklocal",-ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 480 DEF_CMD("no_prefer_iface",ND6_IFF_NO_PREFER_IFACE,setnd6flags), 481 DEF_CMD("-no_prefer_iface",-ND6_IFF_NO_PREFER_IFACE,setnd6flags), 482 DEF_CMD_ARG("pltime", setip6pltime), 483 DEF_CMD_ARG("vltime", setip6vltime), 484 DEF_CMD("eui64", 0, setip6eui64), 485 }; 486 487 static struct afswtch af_inet6 = { 488 .af_name = "inet6", 489 .af_af = AF_INET6, 490 .af_status = in6_status, 491 .af_getaddr = in6_getaddr, 492 .af_getprefix = in6_getprefix, 493 .af_other_status = nd6_status, 494 .af_postproc = in6_postproc, 495 .af_status_tunnel = in6_status_tunnel, 496 .af_settunnel = in6_set_tunnel, 497 .af_difaddr = SIOCDIFADDR_IN6, 498 .af_aifaddr = SIOCAIFADDR_IN6, 499 .af_ridreq = &in6_addreq, 500 .af_addreq = &in6_addreq, 501 }; 502 503 static void 504 in6_Lopt_cb(const char *optarg __unused) 505 { 506 ip6lifetime++; /* print IPv6 address lifetime */ 507 } 508 static struct option in6_Lopt = { .opt = "L", .opt_usage = "[-L]", .cb = in6_Lopt_cb }; 509 510 static __constructor void 511 inet6_ctor(void) 512 { 513 #define N(a) (sizeof(a) / sizeof(a[0])) 514 size_t i; 515 516 #ifndef RESCUE 517 if (!feature_present("inet6")) 518 return; 519 #endif 520 521 for (i = 0; i < N(inet6_cmds); i++) 522 cmd_register(&inet6_cmds[i]); 523 af_register(&af_inet6); 524 opt_register(&in6_Lopt); 525 #undef N 526 } 527