af_inet6.c revision 194799
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 31static const char rcsid[] = 32 "$FreeBSD: head/sbin/ifconfig/af_inet6.c 194799 2009-06-23 23:49:52Z delphij $"; 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 59static struct in6_ifreq in6_ridreq; 60static struct in6_aliasreq in6_addreq = 61 { .ifra_flags = 0, 62 .ifra_lifetime = { 0, 0, ND6_INFINITE_LIFETIME, ND6_INFINITE_LIFETIME } }; 63static int ip6lifetime; 64 65static void in6_fillscopeid(struct sockaddr_in6 *sin6); 66static int prefix(void *, int); 67static char *sec2str(time_t); 68static int explicit_prefix = 0; 69 70static char addr_buf[MAXHOSTNAMELEN *2 + 1]; /*for getnameinfo()*/ 71 72static void 73setifprefixlen(const char *addr, int dummy __unused, int s, 74 const struct afswtch *afp) 75{ 76 if (afp->af_getprefix != NULL) 77 afp->af_getprefix(addr, MASK); 78 explicit_prefix = 1; 79} 80 81static void 82setip6flags(const char *dummyaddr __unused, int flag, int dummysoc __unused, 83 const struct afswtch *afp) 84{ 85 if (afp->af_af != AF_INET6) 86 err(1, "address flags can be set only for inet6 addresses"); 87 88 if (flag < 0) 89 in6_addreq.ifra_flags &= ~(-flag); 90 else 91 in6_addreq.ifra_flags |= flag; 92} 93 94static void 95setip6lifetime(const char *cmd, const char *val, int s, 96 const struct afswtch *afp) 97{ 98 time_t newval, t; 99 char *ep; 100 101 t = time(NULL); 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 = t + newval; 109 in6_addreq.ifra_lifetime.ia6t_vltime = newval; 110 } else if (strcmp(cmd, "pltime") == 0) { 111 in6_addreq.ifra_lifetime.ia6t_preferred = t + newval; 112 in6_addreq.ifra_lifetime.ia6t_pltime = newval; 113 } 114} 115 116static void 117setip6pltime(const char *seconds, int dummy __unused, int s, 118 const struct afswtch *afp) 119{ 120 setip6lifetime("pltime", seconds, s, afp); 121} 122 123static void 124setip6vltime(const char *seconds, int dummy __unused, int s, 125 const struct afswtch *afp) 126{ 127 setip6lifetime("vltime", seconds, s, afp); 128} 129 130static void 131setip6eui64(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 164static void 165in6_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 176static void 177in6_status(int s __unused, const struct ifaddrs *ifa) 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 time_t t = time(NULL); 185 int error; 186 u_int32_t scopeid; 187 188 memset(&null_sin, 0, sizeof(null_sin)); 189 190 sin = (struct sockaddr_in6 *)ifa->ifa_addr; 191 if (sin == NULL) 192 return; 193 194 strncpy(ifr6.ifr_name, ifr.ifr_name, sizeof(ifr.ifr_name)); 195 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 196 warn("socket(AF_INET6,SOCK_DGRAM)"); 197 return; 198 } 199 ifr6.ifr_addr = *sin; 200 if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) { 201 warn("ioctl(SIOCGIFAFLAG_IN6)"); 202 close(s6); 203 return; 204 } 205 flags6 = ifr6.ifr_ifru.ifru_flags6; 206 memset(&lifetime, 0, sizeof(lifetime)); 207 ifr6.ifr_addr = *sin; 208 if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) { 209 warn("ioctl(SIOCGIFALIFETIME_IN6)"); 210 close(s6); 211 return; 212 } 213 lifetime = ifr6.ifr_ifru.ifru_lifetime; 214 close(s6); 215 216 /* XXX: embedded link local addr check */ 217 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) && 218 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) { 219 u_short index; 220 221 index = *(u_short *)&sin->sin6_addr.s6_addr[2]; 222 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0; 223 if (sin->sin6_scope_id == 0) 224 sin->sin6_scope_id = ntohs(index); 225 } 226 scopeid = sin->sin6_scope_id; 227 228 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf, 229 sizeof(addr_buf), NULL, 0, NI_NUMERICHOST); 230 if (error != 0) 231 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 232 sizeof(addr_buf)); 233 printf("\tinet6 %s ", addr_buf); 234 235 if (ifa->ifa_flags & IFF_POINTOPOINT) { 236 sin = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 237 /* 238 * some of the interfaces do not have valid destination 239 * address. 240 */ 241 if (sin != NULL && sin->sin6_family == AF_INET6) { 242 int error; 243 244 /* XXX: embedded link local addr check */ 245 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) && 246 *(u_short *)&sin->sin6_addr.s6_addr[2] != 0) { 247 u_short index; 248 249 index = *(u_short *)&sin->sin6_addr.s6_addr[2]; 250 *(u_short *)&sin->sin6_addr.s6_addr[2] = 0; 251 if (sin->sin6_scope_id == 0) 252 sin->sin6_scope_id = ntohs(index); 253 } 254 255 error = getnameinfo((struct sockaddr *)sin, 256 sin->sin6_len, addr_buf, 257 sizeof(addr_buf), NULL, 0, 258 NI_NUMERICHOST); 259 if (error != 0) 260 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 261 sizeof(addr_buf)); 262 printf("--> %s ", addr_buf); 263 } 264 } 265 266 sin = (struct sockaddr_in6 *)ifa->ifa_netmask; 267 if (sin == NULL) 268 sin = &null_sin; 269 printf("prefixlen %d ", prefix(&sin->sin6_addr, 270 sizeof(struct in6_addr))); 271 272 if ((flags6 & IN6_IFF_ANYCAST) != 0) 273 printf("anycast "); 274 if ((flags6 & IN6_IFF_TENTATIVE) != 0) 275 printf("tentative "); 276 if ((flags6 & IN6_IFF_DUPLICATED) != 0) 277 printf("duplicated "); 278 if ((flags6 & IN6_IFF_DETACHED) != 0) 279 printf("detached "); 280 if ((flags6 & IN6_IFF_DEPRECATED) != 0) 281 printf("deprecated "); 282 if ((flags6 & IN6_IFF_AUTOCONF) != 0) 283 printf("autoconf "); 284 if ((flags6 & IN6_IFF_TEMPORARY) != 0) 285 printf("temporary "); 286 287 if (scopeid) 288 printf("scopeid 0x%x ", scopeid); 289 290 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) { 291 printf("pltime "); 292 if (lifetime.ia6t_preferred) { 293 printf("%s ", lifetime.ia6t_preferred < t 294 ? "0" : sec2str(lifetime.ia6t_preferred - t)); 295 } else 296 printf("infty "); 297 298 printf("vltime "); 299 if (lifetime.ia6t_expire) { 300 printf("%s ", lifetime.ia6t_expire < t 301 ? "0" : sec2str(lifetime.ia6t_expire - t)); 302 } else 303 printf("infty "); 304 } 305 306 putchar('\n'); 307} 308 309#define SIN6(x) ((struct sockaddr_in6 *) &(x)) 310static struct sockaddr_in6 *sin6tab[] = { 311 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr), 312 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr) 313}; 314 315static void 316in6_getprefix(const char *plen, int which) 317{ 318 struct sockaddr_in6 *sin = sin6tab[which]; 319 u_char *cp; 320 int len = atoi(plen); 321 322 if ((len < 0) || (len > 128)) 323 errx(1, "%s: bad value", plen); 324 sin->sin6_len = sizeof(*sin); 325 if (which != MASK) 326 sin->sin6_family = AF_INET6; 327 if ((len == 0) || (len == 128)) { 328 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr)); 329 return; 330 } 331 memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr)); 332 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8) 333 *cp++ = 0xff; 334 *cp = 0xff << (8 - len); 335} 336 337static void 338in6_getaddr(const char *s, int which) 339{ 340 struct sockaddr_in6 *sin = sin6tab[which]; 341 struct addrinfo hints, *res; 342 int error = -1; 343 344 newaddr &= 1; 345 346 sin->sin6_len = sizeof(*sin); 347 if (which != MASK) 348 sin->sin6_family = AF_INET6; 349 350 if (which == ADDR) { 351 char *p = NULL; 352 if((p = strrchr(s, '/')) != NULL) { 353 *p = '\0'; 354 in6_getprefix(p + 1, MASK); 355 explicit_prefix = 1; 356 } 357 } 358 359 if (sin->sin6_family == AF_INET6) { 360 bzero(&hints, sizeof(struct addrinfo)); 361 hints.ai_family = AF_INET6; 362 error = getaddrinfo(s, NULL, &hints, &res); 363 } 364 if (error != 0) { 365 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1) 366 errx(1, "%s: bad value", s); 367 } else 368 bcopy(res->ai_addr, sin, res->ai_addrlen); 369} 370 371static int 372prefix(void *val, int size) 373{ 374 u_char *name = (u_char *)val; 375 int byte, bit, plen = 0; 376 377 for (byte = 0; byte < size; byte++, plen += 8) 378 if (name[byte] != 0xff) 379 break; 380 if (byte == size) 381 return (plen); 382 for (bit = 7; bit != 0; bit--, plen++) 383 if (!(name[byte] & (1 << bit))) 384 break; 385 for (; bit != 0; bit--) 386 if (name[byte] & (1 << bit)) 387 return(0); 388 byte++; 389 for (; byte < size; byte++) 390 if (name[byte]) 391 return(0); 392 return (plen); 393} 394 395static char * 396sec2str(time_t total) 397{ 398 static char result[256]; 399 int days, hours, mins, secs; 400 int first = 1; 401 char *p = result; 402 403 if (0) { 404 days = total / 3600 / 24; 405 hours = (total / 3600) % 24; 406 mins = (total / 60) % 60; 407 secs = total % 60; 408 409 if (days) { 410 first = 0; 411 p += sprintf(p, "%dd", days); 412 } 413 if (!first || hours) { 414 first = 0; 415 p += sprintf(p, "%dh", hours); 416 } 417 if (!first || mins) { 418 first = 0; 419 p += sprintf(p, "%dm", mins); 420 } 421 sprintf(p, "%ds", secs); 422 } else 423 sprintf(result, "%lu", (unsigned long)total); 424 425 return(result); 426} 427 428static void 429in6_postproc(int s, const struct afswtch *afp) 430{ 431 if (explicit_prefix == 0) { 432 /* Aggregatable address architecture defines all prefixes 433 are 64. So, it is convenient to set prefixlen to 64 if 434 it is not specified. */ 435 setifprefixlen("64", 0, s, afp); 436 /* in6_getprefix("64", MASK) if MASK is available here... */ 437 } 438} 439 440static void 441in6_status_tunnel(int s) 442{ 443 char src[NI_MAXHOST]; 444 char dst[NI_MAXHOST]; 445 struct in6_ifreq in6_ifr; 446 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr; 447 448 memset(&in6_ifr, 0, sizeof(in6_ifr)); 449 strncpy(in6_ifr.ifr_name, name, IFNAMSIZ); 450 451 if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0) 452 return; 453 if (sa->sa_family != AF_INET6) 454 return; 455 in6_fillscopeid(&in6_ifr.ifr_addr); 456 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, 457 NI_NUMERICHOST) != 0) 458 src[0] = '\0'; 459 460 if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0) 461 return; 462 if (sa->sa_family != AF_INET6) 463 return; 464 in6_fillscopeid(&in6_ifr.ifr_addr); 465 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, 466 NI_NUMERICHOST) != 0) 467 dst[0] = '\0'; 468 469 printf("\ttunnel inet6 %s --> %s\n", src, dst); 470} 471 472static void 473in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 474{ 475 struct in6_aliasreq in6_addreq; 476 477 memset(&in6_addreq, 0, sizeof(in6_addreq)); 478 strncpy(in6_addreq.ifra_name, name, IFNAMSIZ); 479 memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 480 memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr, 481 dstres->ai_addr->sa_len); 482 483 if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0) 484 warn("SIOCSIFPHYADDR_IN6"); 485} 486 487static struct cmd inet6_cmds[] = { 488 DEF_CMD_ARG("prefixlen", setifprefixlen), 489 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags), 490 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags), 491 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags), 492 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags), 493 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags), 494 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags), 495 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags), 496 DEF_CMD_ARG("pltime", setip6pltime), 497 DEF_CMD_ARG("vltime", setip6vltime), 498 DEF_CMD("eui64", 0, setip6eui64), 499}; 500 501static struct afswtch af_inet6 = { 502 .af_name = "inet6", 503 .af_af = AF_INET6, 504 .af_status = in6_status, 505 .af_getaddr = in6_getaddr, 506 .af_getprefix = in6_getprefix, 507 .af_postproc = in6_postproc, 508 .af_status_tunnel = in6_status_tunnel, 509 .af_settunnel = in6_set_tunnel, 510 .af_difaddr = SIOCDIFADDR_IN6, 511 .af_aifaddr = SIOCAIFADDR_IN6, 512 .af_ridreq = &in6_addreq, 513 .af_addreq = &in6_addreq, 514}; 515 516static void 517in6_Lopt_cb(const char *optarg __unused) 518{ 519 ip6lifetime++; /* print IPv6 address lifetime */ 520} 521static struct option in6_Lopt = { .opt = "L", .opt_usage = "[-L]", .cb = in6_Lopt_cb }; 522 523static __constructor void 524inet6_ctor(void) 525{ 526#define N(a) (sizeof(a) / sizeof(a[0])) 527 size_t i; 528 529 for (i = 0; i < N(inet6_cmds); i++) 530 cmd_register(&inet6_cmds[i]); 531 af_register(&af_inet6); 532 opt_register(&in6_Lopt); 533#undef N 534} 535