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 <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 struct timespec now; 102 time_t newval; 103 char *ep; 104 105 clock_gettime(CLOCK_MONOTONIC_FAST, &now); 106 newval = (time_t)strtoul(val, &ep, 0); 107 if (val == ep) 108 errx(1, "invalid %s", cmd); 109 if (afp->af_af != AF_INET6) 110 errx(1, "%s not allowed for the AF", cmd); 111 if (strcmp(cmd, "vltime") == 0) { 112 in6_addreq.ifra_lifetime.ia6t_expire = now.tv_sec + newval; 113 in6_addreq.ifra_lifetime.ia6t_vltime = newval; 114 } else if (strcmp(cmd, "pltime") == 0) { 115 in6_addreq.ifra_lifetime.ia6t_preferred = now.tv_sec + newval; 116 in6_addreq.ifra_lifetime.ia6t_pltime = newval; 117 } 118 } 119 120 static void 121 setip6pltime(const char *seconds, int dummy __unused, int s, 122 const struct afswtch *afp) 123 { 124 setip6lifetime("pltime", seconds, s, afp); 125 } 126 127 static void 128 setip6vltime(const char *seconds, int dummy __unused, int s, 129 const struct afswtch *afp) 130 { 131 setip6lifetime("vltime", seconds, s, afp); 132 } 133 134 static void 135 setip6eui64(const char *cmd, int dummy __unused, int s, 136 const struct afswtch *afp) 137 { 138 struct ifaddrs *ifap, *ifa; 139 const struct sockaddr_in6 *sin6 = NULL; 140 const struct in6_addr *lladdr = NULL; 141 struct in6_addr *in6; 142 143 if (afp->af_af != AF_INET6) 144 errx(EXIT_FAILURE, "%s not allowed for the AF", cmd); 145 in6 = (struct in6_addr *)&in6_addreq.ifra_addr.sin6_addr; 146 if (memcmp(&in6addr_any.s6_addr[8], &in6->s6_addr[8], 8) != 0) 147 errx(EXIT_FAILURE, "interface index is already filled"); 148 if (getifaddrs(&ifap) != 0) 149 err(EXIT_FAILURE, "getifaddrs"); 150 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 151 if (ifa->ifa_addr->sa_family == AF_INET6 && 152 strcmp(ifa->ifa_name, name) == 0) { 153 sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr; 154 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 155 lladdr = &sin6->sin6_addr; 156 break; 157 } 158 } 159 } 160 if (!lladdr) 161 errx(EXIT_FAILURE, "could not determine link local address"); 162 163 memcpy(&in6->s6_addr[8], &lladdr->s6_addr[8], 8); 164 165 freeifaddrs(ifap); 166 } 167 168 static void 169 in6_status(int s __unused, const struct ifaddrs *ifa) 170 { 171 struct sockaddr_in6 *sin, null_sin; 172 struct in6_ifreq ifr6; 173 int s6; 174 u_int32_t flags6; 175 struct in6_addrlifetime lifetime; 176 struct timespec now; 177 int error; 178 179 clock_gettime(CLOCK_MONOTONIC_FAST, &now); 180 181 memset(&null_sin, 0, sizeof(null_sin)); 182 183 sin = (struct sockaddr_in6 *)ifa->ifa_addr; 184 if (sin == NULL) 185 return; 186 187 strncpy(ifr6.ifr_name, ifr.ifr_name, sizeof(ifr.ifr_name)); 188 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 189 warn("socket(AF_INET6,SOCK_DGRAM)"); 190 return; 191 } 192 ifr6.ifr_addr = *sin; 193 if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) { 194 warn("ioctl(SIOCGIFAFLAG_IN6)"); 195 close(s6); 196 return; 197 } 198 flags6 = ifr6.ifr_ifru.ifru_flags6; 199 memset(&lifetime, 0, sizeof(lifetime)); 200 ifr6.ifr_addr = *sin; 201 if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) { 202 warn("ioctl(SIOCGIFALIFETIME_IN6)"); 203 close(s6); 204 return; 205 } 206 lifetime = ifr6.ifr_ifru.ifru_lifetime; 207 close(s6); 208 209 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf, 210 sizeof(addr_buf), NULL, 0, NI_NUMERICHOST); 211 if (error != 0) 212 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 213 sizeof(addr_buf)); 214 printf("\tinet6 %s ", addr_buf); 215 216 if (ifa->ifa_flags & IFF_POINTOPOINT) { 217 sin = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 218 /* 219 * some of the interfaces do not have valid destination 220 * address. 221 */ 222 if (sin != NULL && sin->sin6_family == AF_INET6) { 223 int error; 224 225 error = getnameinfo((struct sockaddr *)sin, 226 sin->sin6_len, addr_buf, 227 sizeof(addr_buf), NULL, 0, 228 NI_NUMERICHOST); 229 if (error != 0) 230 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 231 sizeof(addr_buf)); 232 printf("--> %s ", addr_buf); 233 } 234 } 235 236 sin = (struct sockaddr_in6 *)ifa->ifa_netmask; 237 if (sin == NULL) 238 sin = &null_sin; 239 printf("prefixlen %d ", prefix(&sin->sin6_addr, 240 sizeof(struct in6_addr))); 241 242 if ((flags6 & IN6_IFF_ANYCAST) != 0) 243 printf("anycast "); 244 if ((flags6 & IN6_IFF_TENTATIVE) != 0) 245 printf("tentative "); 246 if ((flags6 & IN6_IFF_DUPLICATED) != 0) 247 printf("duplicated "); 248 if ((flags6 & IN6_IFF_DETACHED) != 0) 249 printf("detached "); 250 if ((flags6 & IN6_IFF_DEPRECATED) != 0) 251 printf("deprecated "); 252 if ((flags6 & IN6_IFF_AUTOCONF) != 0) 253 printf("autoconf "); 254 if ((flags6 & IN6_IFF_TEMPORARY) != 0) 255 printf("temporary "); 256 if ((flags6 & IN6_IFF_PREFER_SOURCE) != 0) 257 printf("prefer_source "); 258 259 if (((struct sockaddr_in6 *)(ifa->ifa_addr))->sin6_scope_id) 260 printf("scopeid 0x%x ", 261 ((struct sockaddr_in6 *)(ifa->ifa_addr))->sin6_scope_id); 262 263 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) { 264 printf("pltime "); 265 if (lifetime.ia6t_preferred) { 266 printf("%s ", lifetime.ia6t_preferred < now.tv_sec 267 ? "0" : 268 sec2str(lifetime.ia6t_preferred - now.tv_sec)); 269 } else 270 printf("infty "); 271 272 printf("vltime "); 273 if (lifetime.ia6t_expire) { 274 printf("%s ", lifetime.ia6t_expire < now.tv_sec 275 ? "0" : 276 sec2str(lifetime.ia6t_expire - now.tv_sec)); 277 } else 278 printf("infty "); 279 } 280 281 print_vhid(ifa, " "); 282 283 putchar('\n'); 284 } 285 286 #define SIN6(x) ((struct sockaddr_in6 *) &(x)) 287 static struct sockaddr_in6 *sin6tab[] = { 288 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr), 289 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr) 290 }; 291 292 static void 293 in6_getprefix(const char *plen, int which) 294 { 295 struct sockaddr_in6 *sin = sin6tab[which]; 296 u_char *cp; 297 int len = atoi(plen); 298 299 if ((len < 0) || (len > 128)) 300 errx(1, "%s: bad value", plen); 301 sin->sin6_len = sizeof(*sin); 302 if (which != MASK) 303 sin->sin6_family = AF_INET6; 304 if ((len == 0) || (len == 128)) { 305 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr)); 306 return; 307 } 308 memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr)); 309 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8) 310 *cp++ = 0xff; 311 *cp = 0xff << (8 - len); 312 } 313 314 static void 315 in6_getaddr(const char *s, int which) 316 { 317 struct sockaddr_in6 *sin = sin6tab[which]; 318 struct addrinfo hints, *res; 319 int error = -1; 320 321 newaddr &= 1; 322 323 sin->sin6_len = sizeof(*sin); 324 if (which != MASK) 325 sin->sin6_family = AF_INET6; 326 327 if (which == ADDR) { 328 char *p = NULL; 329 if((p = strrchr(s, '/')) != NULL) { 330 *p = '\0'; 331 in6_getprefix(p + 1, MASK); 332 explicit_prefix = 1; 333 } 334 } 335 336 if (sin->sin6_family == AF_INET6) { 337 bzero(&hints, sizeof(struct addrinfo)); 338 hints.ai_family = AF_INET6; 339 error = getaddrinfo(s, NULL, &hints, &res); 340 } 341 if (error != 0) { 342 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1) 343 errx(1, "%s: bad value", s); 344 } else 345 bcopy(res->ai_addr, sin, res->ai_addrlen); 346 } 347 348 static int 349 prefix(void *val, int size) 350 { 351 u_char *name = (u_char *)val; 352 int byte, bit, plen = 0; 353 354 for (byte = 0; byte < size; byte++, plen += 8) 355 if (name[byte] != 0xff) 356 break; 357 if (byte == size) 358 return (plen); 359 for (bit = 7; bit != 0; bit--, plen++) 360 if (!(name[byte] & (1 << bit))) 361 break; 362 for (; bit != 0; bit--) 363 if (name[byte] & (1 << bit)) 364 return(0); 365 byte++; 366 for (; byte < size; byte++) 367 if (name[byte]) 368 return(0); 369 return (plen); 370 } 371 372 static char * 373 sec2str(time_t total) 374 { 375 static char result[256]; 376 int days, hours, mins, secs; 377 int first = 1; 378 char *p = result; 379 380 if (0) { 381 days = total / 3600 / 24; 382 hours = (total / 3600) % 24; 383 mins = (total / 60) % 60; 384 secs = total % 60; 385 386 if (days) { 387 first = 0; 388 p += sprintf(p, "%dd", days); 389 } 390 if (!first || hours) { 391 first = 0; 392 p += sprintf(p, "%dh", hours); 393 } 394 if (!first || mins) { 395 first = 0; 396 p += sprintf(p, "%dm", mins); 397 } 398 sprintf(p, "%ds", secs); 399 } else 400 sprintf(result, "%lu", (unsigned long)total); 401 402 return(result); 403 } 404 405 static void 406 in6_postproc(int s, const struct afswtch *afp) 407 { 408 if (explicit_prefix == 0) { 409 /* Aggregatable address architecture defines all prefixes 410 are 64. So, it is convenient to set prefixlen to 64 if 411 it is not specified. */ 412 setifprefixlen("64", 0, s, afp); 413 /* in6_getprefix("64", MASK) if MASK is available here... */ 414 } 415 } 416 417 static void 418 in6_status_tunnel(int s) 419 { 420 char src[NI_MAXHOST]; 421 char dst[NI_MAXHOST]; 422 struct in6_ifreq in6_ifr; 423 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr; 424 425 memset(&in6_ifr, 0, sizeof(in6_ifr)); 426 strncpy(in6_ifr.ifr_name, name, IFNAMSIZ); 427 428 if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0) 429 return; 430 if (sa->sa_family != AF_INET6) 431 return; 432 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, 433 NI_NUMERICHOST) != 0) 434 src[0] = '\0'; 435 436 if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0) 437 return; 438 if (sa->sa_family != AF_INET6) 439 return; 440 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, 441 NI_NUMERICHOST) != 0) 442 dst[0] = '\0'; 443 444 printf("\ttunnel inet6 %s --> %s\n", src, dst); 445 } 446 447 static void 448 in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 449 { 450 struct in6_aliasreq in6_addreq; 451 452 memset(&in6_addreq, 0, sizeof(in6_addreq)); 453 strncpy(in6_addreq.ifra_name, name, IFNAMSIZ); 454 memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 455 memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr, 456 dstres->ai_addr->sa_len); 457 458 if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0) 459 warn("SIOCSIFPHYADDR_IN6"); 460 } 461 462 static struct cmd inet6_cmds[] = { 463 DEF_CMD_ARG("prefixlen", setifprefixlen), 464 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags), 465 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags), 466 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags), 467 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags), 468 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags), 469 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags), 470 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags), 471 DEF_CMD("prefer_source",IN6_IFF_PREFER_SOURCE, setip6flags), 472 DEF_CMD("-prefer_source",-IN6_IFF_PREFER_SOURCE,setip6flags), 473 DEF_CMD("accept_rtadv", ND6_IFF_ACCEPT_RTADV, setnd6flags), 474 DEF_CMD("-accept_rtadv",-ND6_IFF_ACCEPT_RTADV, setnd6flags), 475 DEF_CMD("no_radr", ND6_IFF_NO_RADR, setnd6flags), 476 DEF_CMD("-no_radr", -ND6_IFF_NO_RADR, setnd6flags), 477 DEF_CMD("defaultif", 1, setnd6defif), 478 DEF_CMD("-defaultif", -1, setnd6defif), 479 DEF_CMD("ifdisabled", ND6_IFF_IFDISABLED, setnd6flags), 480 DEF_CMD("-ifdisabled", -ND6_IFF_IFDISABLED, setnd6flags), 481 DEF_CMD("nud", ND6_IFF_PERFORMNUD, setnd6flags), 482 DEF_CMD("-nud", -ND6_IFF_PERFORMNUD, setnd6flags), 483 DEF_CMD("auto_linklocal",ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 484 DEF_CMD("-auto_linklocal",-ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 485 DEF_CMD("no_prefer_iface",ND6_IFF_NO_PREFER_IFACE,setnd6flags), 486 DEF_CMD("-no_prefer_iface",-ND6_IFF_NO_PREFER_IFACE,setnd6flags), 487 DEF_CMD("no_dad", ND6_IFF_NO_DAD, setnd6flags), 488 DEF_CMD("-no_dad", -ND6_IFF_NO_DAD, setnd6flags), 489 DEF_CMD_ARG("pltime", setip6pltime), 490 DEF_CMD_ARG("vltime", setip6vltime), 491 DEF_CMD("eui64", 0, setip6eui64), 492 }; 493 494 static struct afswtch af_inet6 = { 495 .af_name = "inet6", 496 .af_af = AF_INET6, 497 .af_status = in6_status, 498 .af_getaddr = in6_getaddr, 499 .af_getprefix = in6_getprefix, 500 .af_other_status = nd6_status, 501 .af_postproc = in6_postproc, 502 .af_status_tunnel = in6_status_tunnel, 503 .af_settunnel = in6_set_tunnel, 504 .af_difaddr = SIOCDIFADDR_IN6, 505 .af_aifaddr = SIOCAIFADDR_IN6, 506 .af_ridreq = &in6_addreq, 507 .af_addreq = &in6_addreq, 508 }; 509 510 static void 511 in6_Lopt_cb(const char *optarg __unused) 512 { 513 ip6lifetime++; /* print IPv6 address lifetime */ 514 } 515 static struct option in6_Lopt = { 516 .opt = "L", 517 .opt_usage = "[-L]", 518 .cb = in6_Lopt_cb 519 }; 520 521 static __constructor void 522 inet6_ctor(void) 523 { 524 size_t i; 525 526 #ifndef RESCUE 527 if (!feature_present("inet6")) 528 return; 529 #endif 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