af_inet6.c revision 300285
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: stable/10/sbin/ifconfig/af_inet6.c 300285 2016-05-20 07:14:03Z truckman $"; 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 60static struct in6_ifreq in6_ridreq; 61static struct in6_aliasreq in6_addreq = 62 { .ifra_flags = 0, 63 .ifra_lifetime = { 0, 0, ND6_INFINITE_LIFETIME, ND6_INFINITE_LIFETIME } }; 64static int ip6lifetime; 65 66static int prefix(void *, int); 67static char *sec2str(time_t); 68static int explicit_prefix = 0; 69 70extern void setnd6flags(const char *, int, int, const struct afswtch *); 71extern void setnd6defif(const char *, int, int, const struct afswtch *); 72extern void nd6_status(int); 73 74static char addr_buf[MAXHOSTNAMELEN *2 + 1]; /*for getnameinfo()*/ 75 76static void 77setifprefixlen(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 85static void 86setip6flags(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 98static void 99setip6lifetime(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 121static void 122setip6pltime(const char *seconds, int dummy __unused, int s, 123 const struct afswtch *afp) 124{ 125 setip6lifetime("pltime", seconds, s, afp); 126} 127 128static void 129setip6vltime(const char *seconds, int dummy __unused, int s, 130 const struct afswtch *afp) 131{ 132 setip6lifetime("vltime", seconds, s, afp); 133} 134 135static void 136setip6eui64(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 169static void 170in6_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 strlcpy(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 if ((flags6 & IN6_IFF_PREFER_SOURCE) != 0) 258 printf("prefer_source "); 259 260 if (((struct sockaddr_in6 *)(ifa->ifa_addr))->sin6_scope_id) 261 printf("scopeid 0x%x ", 262 ((struct sockaddr_in6 *)(ifa->ifa_addr))->sin6_scope_id); 263 264 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) { 265 printf("pltime "); 266 if (lifetime.ia6t_preferred) { 267 printf("%s ", lifetime.ia6t_preferred < now.tv_sec 268 ? "0" : 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" : sec2str(lifetime.ia6t_expire - now.tv_sec)); 276 } else 277 printf("infty "); 278 } 279 280 print_vhid(ifa, " "); 281 282 putchar('\n'); 283} 284 285#define SIN6(x) ((struct sockaddr_in6 *) &(x)) 286static struct sockaddr_in6 *sin6tab[] = { 287 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr), 288 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr) 289}; 290 291static void 292in6_getprefix(const char *plen, int which) 293{ 294 struct sockaddr_in6 *sin = sin6tab[which]; 295 u_char *cp; 296 int len = atoi(plen); 297 298 if ((len < 0) || (len > 128)) 299 errx(1, "%s: bad value", plen); 300 sin->sin6_len = sizeof(*sin); 301 if (which != MASK) 302 sin->sin6_family = AF_INET6; 303 if ((len == 0) || (len == 128)) { 304 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr)); 305 return; 306 } 307 memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr)); 308 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8) 309 *cp++ = 0xff; 310 *cp = 0xff << (8 - len); 311} 312 313static void 314in6_getaddr(const char *s, int which) 315{ 316 struct sockaddr_in6 *sin = sin6tab[which]; 317 struct addrinfo hints, *res; 318 int error = -1; 319 320 newaddr &= 1; 321 322 sin->sin6_len = sizeof(*sin); 323 if (which != MASK) 324 sin->sin6_family = AF_INET6; 325 326 if (which == ADDR) { 327 char *p = NULL; 328 if((p = strrchr(s, '/')) != NULL) { 329 *p = '\0'; 330 in6_getprefix(p + 1, MASK); 331 explicit_prefix = 1; 332 } 333 } 334 335 if (sin->sin6_family == AF_INET6) { 336 bzero(&hints, sizeof(struct addrinfo)); 337 hints.ai_family = AF_INET6; 338 error = getaddrinfo(s, NULL, &hints, &res); 339 } 340 if (error != 0) { 341 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1) 342 errx(1, "%s: bad value", s); 343 } else 344 bcopy(res->ai_addr, sin, res->ai_addrlen); 345} 346 347static int 348prefix(void *val, int size) 349{ 350 u_char *name = (u_char *)val; 351 int byte, bit, plen = 0; 352 353 for (byte = 0; byte < size; byte++, plen += 8) 354 if (name[byte] != 0xff) 355 break; 356 if (byte == size) 357 return (plen); 358 for (bit = 7; bit != 0; bit--, plen++) 359 if (!(name[byte] & (1 << bit))) 360 break; 361 for (; bit != 0; bit--) 362 if (name[byte] & (1 << bit)) 363 return(0); 364 byte++; 365 for (; byte < size; byte++) 366 if (name[byte]) 367 return(0); 368 return (plen); 369} 370 371static char * 372sec2str(time_t total) 373{ 374 static char result[256]; 375 int days, hours, mins, secs; 376 int first = 1; 377 char *p = result; 378 379 if (0) { 380 days = total / 3600 / 24; 381 hours = (total / 3600) % 24; 382 mins = (total / 60) % 60; 383 secs = total % 60; 384 385 if (days) { 386 first = 0; 387 p += sprintf(p, "%dd", days); 388 } 389 if (!first || hours) { 390 first = 0; 391 p += sprintf(p, "%dh", hours); 392 } 393 if (!first || mins) { 394 first = 0; 395 p += sprintf(p, "%dm", mins); 396 } 397 sprintf(p, "%ds", secs); 398 } else 399 sprintf(result, "%lu", (unsigned long)total); 400 401 return(result); 402} 403 404static void 405in6_postproc(int s, const struct afswtch *afp) 406{ 407 if (explicit_prefix == 0) { 408 /* Aggregatable address architecture defines all prefixes 409 are 64. So, it is convenient to set prefixlen to 64 if 410 it is not specified. */ 411 setifprefixlen("64", 0, s, afp); 412 /* in6_getprefix("64", MASK) if MASK is available here... */ 413 } 414} 415 416static void 417in6_status_tunnel(int s) 418{ 419 char src[NI_MAXHOST]; 420 char dst[NI_MAXHOST]; 421 struct in6_ifreq in6_ifr; 422 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr; 423 424 memset(&in6_ifr, 0, sizeof(in6_ifr)); 425 strlcpy(in6_ifr.ifr_name, name, sizeof(in6_ifr.ifr_name)); 426 427 if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0) 428 return; 429 if (sa->sa_family != AF_INET6) 430 return; 431 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, 432 NI_NUMERICHOST) != 0) 433 src[0] = '\0'; 434 435 if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0) 436 return; 437 if (sa->sa_family != AF_INET6) 438 return; 439 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, 440 NI_NUMERICHOST) != 0) 441 dst[0] = '\0'; 442 443 printf("\ttunnel inet6 %s --> %s\n", src, dst); 444} 445 446static void 447in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 448{ 449 struct in6_aliasreq in6_addreq; 450 451 memset(&in6_addreq, 0, sizeof(in6_addreq)); 452 strlcpy(in6_addreq.ifra_name, name, sizeof(in6_addreq.ifra_name)); 453 memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 454 memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr, 455 dstres->ai_addr->sa_len); 456 457 if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0) 458 warn("SIOCSIFPHYADDR_IN6"); 459} 460 461static struct cmd inet6_cmds[] = { 462 DEF_CMD_ARG("prefixlen", setifprefixlen), 463 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags), 464 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags), 465 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags), 466 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags), 467 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags), 468 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags), 469 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags), 470 DEF_CMD("prefer_source",IN6_IFF_PREFER_SOURCE, setip6flags), 471 DEF_CMD("-prefer_source",-IN6_IFF_PREFER_SOURCE,setip6flags), 472 DEF_CMD("accept_rtadv", ND6_IFF_ACCEPT_RTADV, setnd6flags), 473 DEF_CMD("-accept_rtadv",-ND6_IFF_ACCEPT_RTADV, setnd6flags), 474 DEF_CMD("no_radr", ND6_IFF_NO_RADR, setnd6flags), 475 DEF_CMD("-no_radr", -ND6_IFF_NO_RADR, setnd6flags), 476 DEF_CMD("defaultif", 1, setnd6defif), 477 DEF_CMD("-defaultif", -1, setnd6defif), 478 DEF_CMD("ifdisabled", ND6_IFF_IFDISABLED, setnd6flags), 479 DEF_CMD("-ifdisabled", -ND6_IFF_IFDISABLED, setnd6flags), 480 DEF_CMD("nud", ND6_IFF_PERFORMNUD, setnd6flags), 481 DEF_CMD("-nud", -ND6_IFF_PERFORMNUD, setnd6flags), 482 DEF_CMD("auto_linklocal",ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 483 DEF_CMD("-auto_linklocal",-ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 484 DEF_CMD("no_prefer_iface",ND6_IFF_NO_PREFER_IFACE,setnd6flags), 485 DEF_CMD("-no_prefer_iface",-ND6_IFF_NO_PREFER_IFACE,setnd6flags), 486 DEF_CMD("no_dad", ND6_IFF_NO_DAD, setnd6flags), 487 DEF_CMD("-no_dad", -ND6_IFF_NO_DAD, setnd6flags), 488 DEF_CMD_ARG("pltime", setip6pltime), 489 DEF_CMD_ARG("vltime", setip6vltime), 490 DEF_CMD("eui64", 0, setip6eui64), 491}; 492 493static struct afswtch af_inet6 = { 494 .af_name = "inet6", 495 .af_af = AF_INET6, 496 .af_status = in6_status, 497 .af_getaddr = in6_getaddr, 498 .af_getprefix = in6_getprefix, 499 .af_other_status = nd6_status, 500 .af_postproc = in6_postproc, 501 .af_status_tunnel = in6_status_tunnel, 502 .af_settunnel = in6_set_tunnel, 503 .af_difaddr = SIOCDIFADDR_IN6, 504 .af_aifaddr = SIOCAIFADDR_IN6, 505 .af_ridreq = &in6_addreq, 506 .af_addreq = &in6_addreq, 507}; 508 509static void 510in6_Lopt_cb(const char *optarg __unused) 511{ 512 ip6lifetime++; /* print IPv6 address lifetime */ 513} 514static struct option in6_Lopt = { .opt = "L", .opt_usage = "[-L]", .cb = in6_Lopt_cb }; 515 516static __constructor void 517inet6_ctor(void) 518{ 519 size_t i; 520 521#ifndef RESCUE 522 if (!feature_present("inet6")) 523 return; 524#endif 525 526 for (i = 0; i < nitems(inet6_cmds); i++) 527 cmd_register(&inet6_cmds[i]); 528 af_register(&af_inet6); 529 opt_register(&in6_Lopt); 530} 531