1 /*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * 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 * 3. Neither the name of the project 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 PROJECT 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 PROJECT 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 * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ 30 */ 31 32 /*- 33 * Copyright (c) 1982, 1986, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)in.c 8.2 (Berkeley) 11/15/93 61 */ 62 63 #include <sys/cdefs.h> 64 __FBSDID("$FreeBSD$"); 65 66 #include "opt_compat.h" 67 #include "opt_inet.h" 68 #include "opt_inet6.h" 69 70 #include <sys/param.h> 71 #include <sys/eventhandler.h> 72 #include <sys/errno.h> 73 #include <sys/jail.h> 74 #include <sys/malloc.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/sockio.h> 78 #include <sys/systm.h> 79 #include <sys/priv.h> 80 #include <sys/proc.h> 81 #include <sys/time.h> 82 #include <sys/kernel.h> 83 #include <sys/lock.h> 84 #include <sys/rmlock.h> 85 #include <sys/syslog.h> 86 87 #include <net/if.h> 88 #include <net/if_var.h> 89 #include <net/if_types.h> 90 #include <net/route.h> 91 #include <net/if_dl.h> 92 #include <net/vnet.h> 93 94 #include <netinet/in.h> 95 #include <netinet/in_var.h> 96 #include <net/if_llatbl.h> 97 #include <netinet/if_ether.h> 98 #include <netinet/in_systm.h> 99 #include <netinet/ip.h> 100 #include <netinet/in_pcb.h> 101 #include <netinet/ip_carp.h> 102 103 #include <netinet/ip6.h> 104 #include <netinet6/ip6_var.h> 105 #include <netinet6/nd6.h> 106 #include <netinet6/mld6_var.h> 107 #include <netinet6/ip6_mroute.h> 108 #include <netinet6/in6_ifattach.h> 109 #include <netinet6/scope6_var.h> 110 #include <netinet6/in6_fib.h> 111 #include <netinet6/in6_pcb.h> 112 113 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix); 114 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix) 115 116 /* 117 * Definitions of some costant IP6 addresses. 118 */ 119 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 120 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 121 const struct in6_addr in6addr_nodelocal_allnodes = 122 IN6ADDR_NODELOCAL_ALLNODES_INIT; 123 const struct in6_addr in6addr_linklocal_allnodes = 124 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 125 const struct in6_addr in6addr_linklocal_allrouters = 126 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 127 const struct in6_addr in6addr_linklocal_allv2routers = 128 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 129 130 const struct in6_addr in6mask0 = IN6MASK0; 131 const struct in6_addr in6mask32 = IN6MASK32; 132 const struct in6_addr in6mask64 = IN6MASK64; 133 const struct in6_addr in6mask96 = IN6MASK96; 134 const struct in6_addr in6mask128 = IN6MASK128; 135 136 const struct sockaddr_in6 sa6_any = 137 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 138 139 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *, 140 struct in6_aliasreq *, int); 141 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 142 143 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *, 144 struct in6_ifaddr *, int); 145 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *, 146 struct in6_aliasreq *, int flags); 147 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *, 148 struct in6_ifaddr *, int, int); 149 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *, 150 struct in6_ifaddr *, int); 151 152 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 153 #define ia62ifa(ia6) (&((ia6)->ia_ifa)) 154 155 156 void 157 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd) 158 { 159 struct sockaddr_dl gateway; 160 struct sockaddr_in6 mask, addr; 161 struct rtentry rt; 162 163 /* 164 * initialize for rtmsg generation 165 */ 166 bzero(&gateway, sizeof(gateway)); 167 gateway.sdl_len = sizeof(gateway); 168 gateway.sdl_family = AF_LINK; 169 170 bzero(&rt, sizeof(rt)); 171 rt.rt_gateway = (struct sockaddr *)&gateway; 172 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 173 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 174 rt_mask(&rt) = (struct sockaddr *)&mask; 175 rt_key(&rt) = (struct sockaddr *)&addr; 176 rt.rt_flags = RTF_HOST | RTF_STATIC; 177 if (cmd == RTM_ADD) 178 rt.rt_flags |= RTF_UP; 179 /* Announce arrival of local address to all FIBs. */ 180 rt_newaddrmsg(cmd, &ia->ia_ifa, 0, &rt); 181 } 182 183 int 184 in6_mask2len(struct in6_addr *mask, u_char *lim0) 185 { 186 int x = 0, y; 187 u_char *lim = lim0, *p; 188 189 /* ignore the scope_id part */ 190 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 191 lim = (u_char *)mask + sizeof(*mask); 192 for (p = (u_char *)mask; p < lim; x++, p++) { 193 if (*p != 0xff) 194 break; 195 } 196 y = 0; 197 if (p < lim) { 198 for (y = 0; y < 8; y++) { 199 if ((*p & (0x80 >> y)) == 0) 200 break; 201 } 202 } 203 204 /* 205 * when the limit pointer is given, do a stricter check on the 206 * remaining bits. 207 */ 208 if (p < lim) { 209 if (y != 0 && (*p & (0x00ff >> y)) != 0) 210 return (-1); 211 for (p = p + 1; p < lim; p++) 212 if (*p != 0) 213 return (-1); 214 } 215 216 return x * 8 + y; 217 } 218 219 #ifdef COMPAT_FREEBSD32 220 struct in6_ndifreq32 { 221 char ifname[IFNAMSIZ]; 222 uint32_t ifindex; 223 }; 224 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 225 #endif 226 227 int 228 in6_control(struct socket *so, u_long cmd, caddr_t data, 229 struct ifnet *ifp, struct thread *td) 230 { 231 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 232 struct in6_ifaddr *ia = NULL; 233 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 234 struct sockaddr_in6 *sa6; 235 int carp_attached = 0; 236 int error; 237 u_long ocmd = cmd; 238 239 /* 240 * Compat to make pre-10.x ifconfig(8) operable. 241 */ 242 if (cmd == OSIOCAIFADDR_IN6) 243 cmd = SIOCAIFADDR_IN6; 244 245 switch (cmd) { 246 case SIOCGETSGCNT_IN6: 247 case SIOCGETMIFCNT_IN6: 248 /* 249 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c. 250 * We cannot see how that would be needed, so do not adjust the 251 * KPI blindly; more likely should clean up the IPv4 variant. 252 */ 253 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 254 } 255 256 switch (cmd) { 257 case SIOCAADDRCTL_POLICY: 258 case SIOCDADDRCTL_POLICY: 259 if (td != NULL) { 260 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 261 if (error) 262 return (error); 263 } 264 return (in6_src_ioctl(cmd, data)); 265 } 266 267 if (ifp == NULL) 268 return (EOPNOTSUPP); 269 270 switch (cmd) { 271 case SIOCSNDFLUSH_IN6: 272 case SIOCSPFXFLUSH_IN6: 273 case SIOCSRTRFLUSH_IN6: 274 case SIOCSDEFIFACE_IN6: 275 case SIOCSIFINFO_FLAGS: 276 case SIOCSIFINFO_IN6: 277 if (td != NULL) { 278 error = priv_check(td, PRIV_NETINET_ND6); 279 if (error) 280 return (error); 281 } 282 /* FALLTHROUGH */ 283 case OSIOCGIFINFO_IN6: 284 case SIOCGIFINFO_IN6: 285 case SIOCGNBRINFO_IN6: 286 case SIOCGDEFIFACE_IN6: 287 return (nd6_ioctl(cmd, data, ifp)); 288 289 #ifdef COMPAT_FREEBSD32 290 case SIOCGDEFIFACE32_IN6: 291 { 292 struct in6_ndifreq ndif; 293 struct in6_ndifreq32 *ndif32; 294 295 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 296 ifp); 297 if (error) 298 return (error); 299 ndif32 = (struct in6_ndifreq32 *)data; 300 ndif32->ifindex = ndif.ifindex; 301 return (0); 302 } 303 #endif 304 } 305 306 switch (cmd) { 307 case SIOCSIFPREFIX_IN6: 308 case SIOCDIFPREFIX_IN6: 309 case SIOCAIFPREFIX_IN6: 310 case SIOCCIFPREFIX_IN6: 311 case SIOCSGIFPREFIX_IN6: 312 case SIOCGIFPREFIX_IN6: 313 log(LOG_NOTICE, 314 "prefix ioctls are now invalidated. " 315 "please use ifconfig.\n"); 316 return (EOPNOTSUPP); 317 } 318 319 switch (cmd) { 320 case SIOCSSCOPE6: 321 if (td != NULL) { 322 error = priv_check(td, PRIV_NETINET_SCOPE6); 323 if (error) 324 return (error); 325 } 326 /* FALLTHROUGH */ 327 case SIOCGSCOPE6: 328 case SIOCGSCOPE6DEF: 329 return (scope6_ioctl(cmd, data, ifp)); 330 } 331 332 /* 333 * Find address for this interface, if it exists. 334 * 335 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 336 * only, and used the first interface address as the target of other 337 * operations (without checking ifra_addr). This was because netinet 338 * code/API assumed at most 1 interface address per interface. 339 * Since IPv6 allows a node to assign multiple addresses 340 * on a single interface, we almost always look and check the 341 * presence of ifra_addr, and reject invalid ones here. 342 * It also decreases duplicated code among SIOC*_IN6 operations. 343 */ 344 switch (cmd) { 345 case SIOCAIFADDR_IN6: 346 case SIOCSIFPHYADDR_IN6: 347 sa6 = &ifra->ifra_addr; 348 break; 349 case SIOCSIFADDR_IN6: 350 case SIOCGIFADDR_IN6: 351 case SIOCSIFDSTADDR_IN6: 352 case SIOCSIFNETMASK_IN6: 353 case SIOCGIFDSTADDR_IN6: 354 case SIOCGIFNETMASK_IN6: 355 case SIOCDIFADDR_IN6: 356 case SIOCGIFPSRCADDR_IN6: 357 case SIOCGIFPDSTADDR_IN6: 358 case SIOCGIFAFLAG_IN6: 359 case SIOCSNDFLUSH_IN6: 360 case SIOCSPFXFLUSH_IN6: 361 case SIOCSRTRFLUSH_IN6: 362 case SIOCGIFALIFETIME_IN6: 363 case SIOCSIFALIFETIME_IN6: 364 case SIOCGIFSTAT_IN6: 365 case SIOCGIFSTAT_ICMP6: 366 sa6 = &ifr->ifr_addr; 367 break; 368 case SIOCSIFADDR: 369 case SIOCSIFBRDADDR: 370 case SIOCSIFDSTADDR: 371 case SIOCSIFNETMASK: 372 /* 373 * Although we should pass any non-INET6 ioctl requests 374 * down to driver, we filter some legacy INET requests. 375 * Drivers trust SIOCSIFADDR et al to come from an already 376 * privileged layer, and do not perform any credentials 377 * checks or input validation. 378 */ 379 return (EINVAL); 380 default: 381 sa6 = NULL; 382 break; 383 } 384 if (sa6 && sa6->sin6_family == AF_INET6) { 385 if (sa6->sin6_scope_id != 0) 386 error = sa6_embedscope(sa6, 0); 387 else 388 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 389 if (error != 0) 390 return (error); 391 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 392 &sa6->sin6_addr)) != 0) 393 return (error); 394 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 395 } else 396 ia = NULL; 397 398 switch (cmd) { 399 case SIOCSIFADDR_IN6: 400 case SIOCSIFDSTADDR_IN6: 401 case SIOCSIFNETMASK_IN6: 402 /* 403 * Since IPv6 allows a node to assign multiple addresses 404 * on a single interface, SIOCSIFxxx ioctls are deprecated. 405 */ 406 /* we decided to obsolete this command (20000704) */ 407 error = EINVAL; 408 goto out; 409 410 case SIOCDIFADDR_IN6: 411 /* 412 * for IPv4, we look for existing in_ifaddr here to allow 413 * "ifconfig if0 delete" to remove the first IPv4 address on 414 * the interface. For IPv6, as the spec allows multiple 415 * interface address from the day one, we consider "remove the 416 * first one" semantics to be not preferable. 417 */ 418 if (ia == NULL) { 419 error = EADDRNOTAVAIL; 420 goto out; 421 } 422 /* FALLTHROUGH */ 423 case SIOCAIFADDR_IN6: 424 /* 425 * We always require users to specify a valid IPv6 address for 426 * the corresponding operation. 427 */ 428 if (ifra->ifra_addr.sin6_family != AF_INET6 || 429 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 430 error = EAFNOSUPPORT; 431 goto out; 432 } 433 434 if (td != NULL) { 435 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 436 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 437 if (error) 438 goto out; 439 } 440 /* FALLTHROUGH */ 441 case SIOCGIFSTAT_IN6: 442 case SIOCGIFSTAT_ICMP6: 443 if (ifp->if_afdata[AF_INET6] == NULL) { 444 error = EPFNOSUPPORT; 445 goto out; 446 } 447 break; 448 449 case SIOCGIFADDR_IN6: 450 /* This interface is basically deprecated. use SIOCGIFCONF. */ 451 /* FALLTHROUGH */ 452 case SIOCGIFAFLAG_IN6: 453 case SIOCGIFNETMASK_IN6: 454 case SIOCGIFDSTADDR_IN6: 455 case SIOCGIFALIFETIME_IN6: 456 /* must think again about its semantics */ 457 if (ia == NULL) { 458 error = EADDRNOTAVAIL; 459 goto out; 460 } 461 break; 462 463 case SIOCSIFALIFETIME_IN6: 464 { 465 struct in6_addrlifetime *lt; 466 467 if (td != NULL) { 468 error = priv_check(td, PRIV_NETINET_ALIFETIME6); 469 if (error) 470 goto out; 471 } 472 if (ia == NULL) { 473 error = EADDRNOTAVAIL; 474 goto out; 475 } 476 /* sanity for overflow - beware unsigned */ 477 lt = &ifr->ifr_ifru.ifru_lifetime; 478 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && 479 lt->ia6t_vltime + time_uptime < time_uptime) { 480 error = EINVAL; 481 goto out; 482 } 483 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && 484 lt->ia6t_pltime + time_uptime < time_uptime) { 485 error = EINVAL; 486 goto out; 487 } 488 break; 489 } 490 } 491 492 switch (cmd) { 493 case SIOCGIFADDR_IN6: 494 ifr->ifr_addr = ia->ia_addr; 495 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 496 goto out; 497 break; 498 499 case SIOCGIFDSTADDR_IN6: 500 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 501 error = EINVAL; 502 goto out; 503 } 504 /* 505 * XXX: should we check if ifa_dstaddr is NULL and return 506 * an error? 507 */ 508 ifr->ifr_dstaddr = ia->ia_dstaddr; 509 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 510 goto out; 511 break; 512 513 case SIOCGIFNETMASK_IN6: 514 ifr->ifr_addr = ia->ia_prefixmask; 515 break; 516 517 case SIOCGIFAFLAG_IN6: 518 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 519 break; 520 521 case SIOCGIFSTAT_IN6: 522 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 523 ifp->if_afdata[AF_INET6])->in6_ifstat, 524 &ifr->ifr_ifru.ifru_stat, 525 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 526 break; 527 528 case SIOCGIFSTAT_ICMP6: 529 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 530 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 531 &ifr->ifr_ifru.ifru_icmp6stat, 532 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 533 break; 534 535 case SIOCGIFALIFETIME_IN6: 536 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 537 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 538 time_t maxexpire; 539 struct in6_addrlifetime *retlt = 540 &ifr->ifr_ifru.ifru_lifetime; 541 542 /* 543 * XXX: adjust expiration time assuming time_t is 544 * signed. 545 */ 546 maxexpire = (-1) & 547 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 548 if (ia->ia6_lifetime.ia6t_vltime < 549 maxexpire - ia->ia6_updatetime) { 550 retlt->ia6t_expire = ia->ia6_updatetime + 551 ia->ia6_lifetime.ia6t_vltime; 552 } else 553 retlt->ia6t_expire = maxexpire; 554 } 555 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 556 time_t maxexpire; 557 struct in6_addrlifetime *retlt = 558 &ifr->ifr_ifru.ifru_lifetime; 559 560 /* 561 * XXX: adjust expiration time assuming time_t is 562 * signed. 563 */ 564 maxexpire = (-1) & 565 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 566 if (ia->ia6_lifetime.ia6t_pltime < 567 maxexpire - ia->ia6_updatetime) { 568 retlt->ia6t_preferred = ia->ia6_updatetime + 569 ia->ia6_lifetime.ia6t_pltime; 570 } else 571 retlt->ia6t_preferred = maxexpire; 572 } 573 break; 574 575 case SIOCSIFALIFETIME_IN6: 576 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 577 /* for sanity */ 578 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 579 ia->ia6_lifetime.ia6t_expire = 580 time_uptime + ia->ia6_lifetime.ia6t_vltime; 581 } else 582 ia->ia6_lifetime.ia6t_expire = 0; 583 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 584 ia->ia6_lifetime.ia6t_preferred = 585 time_uptime + ia->ia6_lifetime.ia6t_pltime; 586 } else 587 ia->ia6_lifetime.ia6t_preferred = 0; 588 break; 589 590 case SIOCAIFADDR_IN6: 591 { 592 struct nd_prefixctl pr0; 593 struct nd_prefix *pr; 594 595 /* 596 * first, make or update the interface address structure, 597 * and link it to the list. 598 */ 599 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 600 goto out; 601 if (ia != NULL) 602 ifa_free(&ia->ia_ifa); 603 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 604 == NULL) { 605 /* 606 * this can happen when the user specify the 0 valid 607 * lifetime. 608 */ 609 break; 610 } 611 612 if (cmd == ocmd && ifra->ifra_vhid > 0) { 613 if (carp_attach_p != NULL) 614 error = (*carp_attach_p)(&ia->ia_ifa, 615 ifra->ifra_vhid); 616 else 617 error = EPROTONOSUPPORT; 618 if (error) 619 goto out; 620 else 621 carp_attached = 1; 622 } 623 624 /* 625 * then, make the prefix on-link on the interface. 626 * XXX: we'd rather create the prefix before the address, but 627 * we need at least one address to install the corresponding 628 * interface route, so we configure the address first. 629 */ 630 631 /* 632 * convert mask to prefix length (prefixmask has already 633 * been validated in in6_update_ifa(). 634 */ 635 bzero(&pr0, sizeof(pr0)); 636 pr0.ndpr_ifp = ifp; 637 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 638 NULL); 639 if (pr0.ndpr_plen == 128) { 640 /* we don't need to install a host route. */ 641 goto aifaddr_out; 642 } 643 pr0.ndpr_prefix = ifra->ifra_addr; 644 /* apply the mask for safety. */ 645 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 646 &ifra->ifra_prefixmask.sin6_addr); 647 648 /* 649 * XXX: since we don't have an API to set prefix (not address) 650 * lifetimes, we just use the same lifetimes as addresses. 651 * The (temporarily) installed lifetimes can be overridden by 652 * later advertised RAs (when accept_rtadv is non 0), which is 653 * an intended behavior. 654 */ 655 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 656 pr0.ndpr_raf_auto = 657 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 658 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 659 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 660 661 /* add the prefix if not yet. */ 662 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 663 /* 664 * nd6_prelist_add will install the corresponding 665 * interface route. 666 */ 667 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 668 if (carp_attached) 669 (*carp_detach_p)(&ia->ia_ifa); 670 goto out; 671 } 672 } 673 674 /* relate the address to the prefix */ 675 if (ia->ia6_ndpr == NULL) { 676 ia->ia6_ndpr = pr; 677 pr->ndpr_refcnt++; 678 679 /* 680 * If this is the first autoconf address from the 681 * prefix, create a temporary address as well 682 * (when required). 683 */ 684 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 685 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) { 686 int e; 687 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 688 log(LOG_NOTICE, "in6_control: failed " 689 "to create a temporary address, " 690 "errno=%d\n", e); 691 } 692 } 693 } 694 695 /* 696 * this might affect the status of autoconfigured addresses, 697 * that is, this address might make other addresses detached. 698 */ 699 pfxlist_onlink_check(); 700 701 aifaddr_out: 702 /* 703 * Try to clear the flag when a new IPv6 address is added 704 * onto an IFDISABLED interface and it succeeds. 705 */ 706 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 707 struct in6_ndireq nd; 708 709 memset(&nd, 0, sizeof(nd)); 710 nd.ndi.flags = ND_IFINFO(ifp)->flags; 711 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 712 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0) 713 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 714 "SIOCSIFINFO_FLAGS for -ifdisabled " 715 "failed."); 716 /* 717 * Ignore failure of clearing the flag intentionally. 718 * The failure means address duplication was detected. 719 */ 720 } 721 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 722 break; 723 } 724 725 case SIOCDIFADDR_IN6: 726 { 727 struct nd_prefix *pr; 728 729 /* 730 * If the address being deleted is the only one that owns 731 * the corresponding prefix, expire the prefix as well. 732 * XXX: theoretically, we don't have to worry about such 733 * relationship, since we separate the address management 734 * and the prefix management. We do this, however, to provide 735 * as much backward compatibility as possible in terms of 736 * the ioctl operation. 737 * Note that in6_purgeaddr() will decrement ndpr_refcnt. 738 */ 739 pr = ia->ia6_ndpr; 740 in6_purgeaddr(&ia->ia_ifa); 741 if (pr && pr->ndpr_refcnt == 0) 742 prelist_remove(pr); 743 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 744 break; 745 } 746 747 default: 748 if (ifp->if_ioctl == NULL) { 749 error = EOPNOTSUPP; 750 goto out; 751 } 752 error = (*ifp->if_ioctl)(ifp, cmd, data); 753 goto out; 754 } 755 756 error = 0; 757 out: 758 if (ia != NULL) 759 ifa_free(&ia->ia_ifa); 760 return (error); 761 } 762 763 764 /* 765 * Join necessary multicast groups. Factored out from in6_update_ifa(). 766 * This entire work should only be done once, for the default FIB. 767 */ 768 static int 769 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 770 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 771 { 772 char ip6buf[INET6_ADDRSTRLEN]; 773 struct in6_addr mltaddr; 774 struct in6_multi_mship *imm; 775 int delay, error; 776 777 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 778 779 /* Join solicited multicast addr for new host id. */ 780 bzero(&mltaddr, sizeof(struct in6_addr)); 781 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 782 mltaddr.s6_addr32[2] = htonl(1); 783 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 784 mltaddr.s6_addr8[12] = 0xff; 785 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 786 /* XXX: should not happen */ 787 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 788 goto cleanup; 789 } 790 delay = error = 0; 791 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 792 /* 793 * We need a random delay for DAD on the address being 794 * configured. It also means delaying transmission of the 795 * corresponding MLD report to avoid report collision. 796 * [RFC 4861, Section 6.3.7] 797 */ 798 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 799 } 800 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 801 if (imm == NULL) { 802 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 803 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 804 if_name(ifp), error)); 805 goto cleanup; 806 } 807 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 808 *in6m_sol = imm->i6mm_maddr; 809 810 /* 811 * Join link-local all-nodes address. 812 */ 813 mltaddr = in6addr_linklocal_allnodes; 814 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 815 goto cleanup; /* XXX: should not fail */ 816 817 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 818 if (imm == NULL) { 819 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 820 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 821 if_name(ifp), error)); 822 goto cleanup; 823 } 824 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 825 826 /* 827 * Join node information group address. 828 */ 829 delay = 0; 830 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 831 /* 832 * The spec does not say anything about delay for this group, 833 * but the same logic should apply. 834 */ 835 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 836 } 837 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 838 /* XXX jinmei */ 839 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 840 if (imm == NULL) 841 nd6log((LOG_WARNING, 842 "%s: in6_joingroup failed for %s on %s " 843 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 844 &mltaddr), if_name(ifp), error)); 845 /* XXX not very fatal, go on... */ 846 else 847 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 848 } 849 if (V_icmp6_nodeinfo_oldmcprefix && 850 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 851 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 852 if (imm == NULL) 853 nd6log((LOG_WARNING, 854 "%s: in6_joingroup failed for %s on %s " 855 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 856 &mltaddr), if_name(ifp), error)); 857 /* XXX not very fatal, go on... */ 858 else 859 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 860 } 861 862 /* 863 * Join interface-local all-nodes address. 864 * (ff01::1%ifN, and ff01::%ifN/32) 865 */ 866 mltaddr = in6addr_nodelocal_allnodes; 867 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 868 goto cleanup; /* XXX: should not fail */ 869 870 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 871 if (imm == NULL) { 872 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 873 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 874 &mltaddr), if_name(ifp), error)); 875 goto cleanup; 876 } 877 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 878 879 cleanup: 880 return (error); 881 } 882 883 /* 884 * Update parameters of an IPv6 interface address. 885 * If necessary, a new entry is created and linked into address chains. 886 * This function is separated from in6_control(). 887 */ 888 int 889 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 890 struct in6_ifaddr *ia, int flags) 891 { 892 int error, hostIsNew = 0; 893 894 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 895 return (error); 896 897 if (ia == NULL) { 898 hostIsNew = 1; 899 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 900 return (ENOBUFS); 901 } 902 903 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 904 if (error != 0) { 905 if (hostIsNew != 0) { 906 in6_unlink_ifa(ia, ifp); 907 ifa_free(&ia->ia_ifa); 908 } 909 return (error); 910 } 911 912 if (hostIsNew) 913 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 914 915 return (error); 916 } 917 918 /* 919 * Fill in basic IPv6 address request info. 920 */ 921 void 922 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 923 const struct in6_addr *mask) 924 { 925 926 memset(ifra, 0, sizeof(struct in6_aliasreq)); 927 928 ifra->ifra_addr.sin6_family = AF_INET6; 929 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 930 if (addr != NULL) 931 ifra->ifra_addr.sin6_addr = *addr; 932 933 ifra->ifra_prefixmask.sin6_family = AF_INET6; 934 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 935 if (mask != NULL) 936 ifra->ifra_prefixmask.sin6_addr = *mask; 937 } 938 939 static int 940 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 941 struct in6_ifaddr *ia, int flags) 942 { 943 int plen = -1; 944 struct sockaddr_in6 dst6; 945 struct in6_addrlifetime *lt; 946 char ip6buf[INET6_ADDRSTRLEN]; 947 948 /* Validate parameters */ 949 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 950 return (EINVAL); 951 952 /* 953 * The destination address for a p2p link must have a family 954 * of AF_UNSPEC or AF_INET6. 955 */ 956 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 957 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 958 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 959 return (EAFNOSUPPORT); 960 961 /* 962 * Validate address 963 */ 964 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 965 ifra->ifra_addr.sin6_family != AF_INET6) 966 return (EINVAL); 967 968 /* 969 * validate ifra_prefixmask. don't check sin6_family, netmask 970 * does not carry fields other than sin6_len. 971 */ 972 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 973 return (EINVAL); 974 /* 975 * Because the IPv6 address architecture is classless, we require 976 * users to specify a (non 0) prefix length (mask) for a new address. 977 * We also require the prefix (when specified) mask is valid, and thus 978 * reject a non-consecutive mask. 979 */ 980 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 981 return (EINVAL); 982 if (ifra->ifra_prefixmask.sin6_len != 0) { 983 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 984 (u_char *)&ifra->ifra_prefixmask + 985 ifra->ifra_prefixmask.sin6_len); 986 if (plen <= 0) 987 return (EINVAL); 988 } else { 989 /* 990 * In this case, ia must not be NULL. We just use its prefix 991 * length. 992 */ 993 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 994 } 995 /* 996 * If the destination address on a p2p interface is specified, 997 * and the address is a scoped one, validate/set the scope 998 * zone identifier. 999 */ 1000 dst6 = ifra->ifra_dstaddr; 1001 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 1002 (dst6.sin6_family == AF_INET6)) { 1003 struct in6_addr in6_tmp; 1004 u_int32_t zoneid; 1005 1006 in6_tmp = dst6.sin6_addr; 1007 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 1008 return (EINVAL); /* XXX: should be impossible */ 1009 1010 if (dst6.sin6_scope_id != 0) { 1011 if (dst6.sin6_scope_id != zoneid) 1012 return (EINVAL); 1013 } else /* user omit to specify the ID. */ 1014 dst6.sin6_scope_id = zoneid; 1015 1016 /* convert into the internal form */ 1017 if (sa6_embedscope(&dst6, 0)) 1018 return (EINVAL); /* XXX: should be impossible */ 1019 } 1020 /* Modify original ifra_dstaddr to reflect changes */ 1021 ifra->ifra_dstaddr = dst6; 1022 1023 /* 1024 * The destination address can be specified only for a p2p or a 1025 * loopback interface. If specified, the corresponding prefix length 1026 * must be 128. 1027 */ 1028 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 1029 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 1030 /* XXX: noisy message */ 1031 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 1032 "be specified for a p2p or a loopback IF only\n")); 1033 return (EINVAL); 1034 } 1035 if (plen != 128) { 1036 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1037 "be 128 when dstaddr is specified\n")); 1038 return (EINVAL); 1039 } 1040 } 1041 /* lifetime consistency check */ 1042 lt = &ifra->ifra_lifetime; 1043 if (lt->ia6t_pltime > lt->ia6t_vltime) 1044 return (EINVAL); 1045 if (lt->ia6t_vltime == 0) { 1046 /* 1047 * the following log might be noisy, but this is a typical 1048 * configuration mistake or a tool's bug. 1049 */ 1050 nd6log((LOG_INFO, 1051 "in6_update_ifa: valid lifetime is 0 for %s\n", 1052 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1053 1054 if (ia == NULL) 1055 return (0); /* there's nothing to do */ 1056 } 1057 1058 /* Check prefix mask */ 1059 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1060 /* 1061 * We prohibit changing the prefix length of an existing 1062 * address, because 1063 * + such an operation should be rare in IPv6, and 1064 * + the operation would confuse prefix management. 1065 */ 1066 if (ia->ia_prefixmask.sin6_len != 0 && 1067 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1068 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1069 "of an existing %s address should not be changed\n", 1070 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1071 1072 return (EINVAL); 1073 } 1074 } 1075 1076 return (0); 1077 } 1078 1079 1080 /* 1081 * Allocate a new ifaddr and link it into chains. 1082 */ 1083 static struct in6_ifaddr * 1084 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1085 { 1086 struct in6_ifaddr *ia; 1087 1088 /* 1089 * When in6_alloc_ifa() is called in a process of a received 1090 * RA, it is called under an interrupt context. So, we should 1091 * call malloc with M_NOWAIT. 1092 */ 1093 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1094 if (ia == NULL) 1095 return (NULL); 1096 LIST_INIT(&ia->ia6_memberships); 1097 /* Initialize the address and masks, and put time stamp */ 1098 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1099 ia->ia_addr.sin6_family = AF_INET6; 1100 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1101 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1102 ia->ia_addr = ifra->ifra_addr; 1103 ia->ia6_createtime = time_uptime; 1104 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1105 /* 1106 * Some functions expect that ifa_dstaddr is not 1107 * NULL for p2p interfaces. 1108 */ 1109 ia->ia_ifa.ifa_dstaddr = 1110 (struct sockaddr *)&ia->ia_dstaddr; 1111 } else { 1112 ia->ia_ifa.ifa_dstaddr = NULL; 1113 } 1114 1115 /* set prefix mask if any */ 1116 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1117 if (ifra->ifra_prefixmask.sin6_len != 0) { 1118 ia->ia_prefixmask.sin6_family = AF_INET6; 1119 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1120 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1121 } 1122 1123 ia->ia_ifp = ifp; 1124 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1125 IF_ADDR_WLOCK(ifp); 1126 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1127 IF_ADDR_WUNLOCK(ifp); 1128 1129 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1130 IN6_IFADDR_WLOCK(); 1131 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1132 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1133 IN6_IFADDR_WUNLOCK(); 1134 1135 return (ia); 1136 } 1137 1138 /* 1139 * Update/configure interface address parameters: 1140 * 1141 * 1) Update lifetime 1142 * 2) Update interface metric ad flags 1143 * 3) Notify other subsystems 1144 */ 1145 static int 1146 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1147 struct in6_ifaddr *ia, int hostIsNew, int flags) 1148 { 1149 int error; 1150 1151 /* update timestamp */ 1152 ia->ia6_updatetime = time_uptime; 1153 1154 /* 1155 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1156 * to see if the address is deprecated or invalidated, but initialize 1157 * these members for applications. 1158 */ 1159 ia->ia6_lifetime = ifra->ifra_lifetime; 1160 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1161 ia->ia6_lifetime.ia6t_expire = 1162 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1163 } else 1164 ia->ia6_lifetime.ia6t_expire = 0; 1165 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1166 ia->ia6_lifetime.ia6t_preferred = 1167 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1168 } else 1169 ia->ia6_lifetime.ia6t_preferred = 0; 1170 1171 /* 1172 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1173 * userland, make it deprecated. 1174 */ 1175 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1176 ia->ia6_lifetime.ia6t_pltime = 0; 1177 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1178 } 1179 1180 /* 1181 * configure address flags. 1182 */ 1183 ia->ia6_flags = ifra->ifra_flags; 1184 1185 /* 1186 * Make the address tentative before joining multicast addresses, 1187 * so that corresponding MLD responses would not have a tentative 1188 * source address. 1189 */ 1190 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1191 1192 /* 1193 * DAD should be performed for an new address or addresses on 1194 * an interface with ND6_IFF_IFDISABLED. 1195 */ 1196 if (in6if_do_dad(ifp) && 1197 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED))) 1198 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1199 1200 /* notify other subsystems */ 1201 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1202 1203 return (error); 1204 } 1205 1206 /* 1207 * Do link-level ifa job: 1208 * 1) Add lle entry for added address 1209 * 2) Notifies routing socket users about new address 1210 * 3) join appropriate multicast group 1211 * 4) start DAD if enabled 1212 */ 1213 static int 1214 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1215 struct in6_ifaddr *ia, int flags) 1216 { 1217 struct in6_multi *in6m_sol; 1218 int error = 0; 1219 1220 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1221 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1222 in6_purgeaddr(&ia->ia_ifa); 1223 ifa_free(&ia->ia_ifa); 1224 return (error); 1225 } 1226 1227 /* Join necessary multicast groups. */ 1228 in6m_sol = NULL; 1229 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1230 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1231 if (error != 0) { 1232 in6_purgeaddr(&ia->ia_ifa); 1233 ifa_free(&ia->ia_ifa); 1234 return (error); 1235 } 1236 } 1237 1238 /* Perform DAD, if the address is TENTATIVE. */ 1239 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) { 1240 int delay, mindelay, maxdelay; 1241 1242 delay = 0; 1243 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1244 /* 1245 * We need to impose a delay before sending an NS 1246 * for DAD. Check if we also needed a delay for the 1247 * corresponding MLD message. If we did, the delay 1248 * should be larger than the MLD delay (this could be 1249 * relaxed a bit, but this simple logic is at least 1250 * safe). 1251 * XXX: Break data hiding guidelines and look at 1252 * state for the solicited multicast group. 1253 */ 1254 mindelay = 0; 1255 if (in6m_sol != NULL && 1256 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1257 mindelay = in6m_sol->in6m_timer; 1258 } 1259 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1260 if (maxdelay - mindelay == 0) 1261 delay = 0; 1262 else { 1263 delay = 1264 (arc4random() % (maxdelay - mindelay)) + 1265 mindelay; 1266 } 1267 } 1268 nd6_dad_start((struct ifaddr *)ia, delay); 1269 } 1270 1271 in6_newaddrmsg(ia, RTM_ADD); 1272 ifa_free(&ia->ia_ifa); 1273 return (error); 1274 } 1275 1276 void 1277 in6_purgeaddr(struct ifaddr *ifa) 1278 { 1279 struct ifnet *ifp = ifa->ifa_ifp; 1280 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1281 struct in6_multi_mship *imm; 1282 int plen, error; 1283 1284 if (ifa->ifa_carp) 1285 (*carp_detach_p)(ifa); 1286 1287 /* 1288 * Remove the loopback route to the interface address. 1289 * The check for the current setting of "nd6_useloopback" 1290 * is not needed. 1291 */ 1292 if (ia->ia_flags & IFA_RTSELF) { 1293 error = ifa_del_loopback_route((struct ifaddr *)ia, 1294 (struct sockaddr *)&ia->ia_addr); 1295 if (error == 0) 1296 ia->ia_flags &= ~IFA_RTSELF; 1297 } 1298 1299 /* stop DAD processing */ 1300 nd6_dad_stop(ifa); 1301 1302 /* Leave multicast groups. */ 1303 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1304 LIST_REMOVE(imm, i6mm_chain); 1305 in6_leavegroup(imm); 1306 } 1307 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1308 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1309 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1310 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0)); 1311 if (error != 0) 1312 log(LOG_INFO, "%s: err=%d, destination address delete " 1313 "failed\n", __func__, error); 1314 ia->ia_flags &= ~IFA_ROUTE; 1315 } 1316 1317 in6_newaddrmsg(ia, RTM_DELETE); 1318 in6_unlink_ifa(ia, ifp); 1319 } 1320 1321 static void 1322 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1323 { 1324 char ip6buf[INET6_ADDRSTRLEN]; 1325 int remove_lle; 1326 1327 IF_ADDR_WLOCK(ifp); 1328 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1329 IF_ADDR_WUNLOCK(ifp); 1330 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1331 1332 /* 1333 * Defer the release of what might be the last reference to the 1334 * in6_ifaddr so that it can't be freed before the remainder of the 1335 * cleanup. 1336 */ 1337 IN6_IFADDR_WLOCK(); 1338 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1339 LIST_REMOVE(ia, ia6_hash); 1340 IN6_IFADDR_WUNLOCK(); 1341 1342 /* 1343 * Release the reference to the base prefix. There should be a 1344 * positive reference. 1345 */ 1346 remove_lle = 0; 1347 if (ia->ia6_ndpr == NULL) { 1348 nd6log((LOG_NOTICE, 1349 "in6_unlink_ifa: autoconf'ed address " 1350 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1351 } else { 1352 ia->ia6_ndpr->ndpr_refcnt--; 1353 /* Do not delete lles within prefix if refcont != 0 */ 1354 if (ia->ia6_ndpr->ndpr_refcnt == 0) 1355 remove_lle = 1; 1356 ia->ia6_ndpr = NULL; 1357 } 1358 1359 nd6_rem_ifa_lle(ia, remove_lle); 1360 1361 /* 1362 * Also, if the address being removed is autoconf'ed, call 1363 * pfxlist_onlink_check() since the release might affect the status of 1364 * other (detached) addresses. 1365 */ 1366 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1367 pfxlist_onlink_check(); 1368 } 1369 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1370 } 1371 1372 /* 1373 * Notifies other subsystems about address change/arrival: 1374 * 1) Notifies device handler on the first IPv6 address assignment 1375 * 2) Handle routing table changes for P2P links and route 1376 * 3) Handle routing table changes for address host route 1377 */ 1378 static int 1379 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1380 struct in6_aliasreq *ifra, int hostIsNew) 1381 { 1382 int error = 0, plen, ifacount = 0; 1383 struct ifaddr *ifa; 1384 struct sockaddr_in6 *pdst; 1385 char ip6buf[INET6_ADDRSTRLEN]; 1386 1387 /* 1388 * Give the interface a chance to initialize 1389 * if this is its first address, 1390 */ 1391 if (hostIsNew != 0) { 1392 IF_ADDR_RLOCK(ifp); 1393 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1394 if (ifa->ifa_addr->sa_family != AF_INET6) 1395 continue; 1396 ifacount++; 1397 } 1398 IF_ADDR_RUNLOCK(ifp); 1399 } 1400 1401 if (ifacount <= 1 && ifp->if_ioctl) { 1402 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1403 if (error) 1404 return (error); 1405 } 1406 1407 /* 1408 * If a new destination address is specified, scrub the old one and 1409 * install the new destination. Note that the interface must be 1410 * p2p or loopback. 1411 */ 1412 pdst = &ifra->ifra_dstaddr; 1413 if (pdst->sin6_family == AF_INET6 && 1414 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1415 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1416 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1417 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1418 "remove a route to the old destination: %s\n", 1419 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1420 /* proceed anyway... */ 1421 } else 1422 ia->ia_flags &= ~IFA_ROUTE; 1423 ia->ia_dstaddr = *pdst; 1424 } 1425 1426 /* 1427 * If a new destination address is specified for a point-to-point 1428 * interface, install a route to the destination as an interface 1429 * direct route. 1430 * XXX: the logic below rejects assigning multiple addresses on a p2p 1431 * interface that share the same destination. 1432 */ 1433 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1434 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1435 ia->ia_dstaddr.sin6_family == AF_INET6) { 1436 int rtflags = RTF_UP | RTF_HOST; 1437 /* 1438 * Handle the case for ::1 . 1439 */ 1440 if (ifp->if_flags & IFF_LOOPBACK) 1441 ia->ia_flags |= IFA_RTSELF; 1442 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1443 if (error) 1444 return (error); 1445 ia->ia_flags |= IFA_ROUTE; 1446 } 1447 1448 /* 1449 * add a loopback route to self if not exists 1450 */ 1451 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1452 error = ifa_add_loopback_route((struct ifaddr *)ia, 1453 (struct sockaddr *)&ia->ia_addr); 1454 if (error == 0) 1455 ia->ia_flags |= IFA_RTSELF; 1456 } 1457 1458 return (error); 1459 } 1460 1461 /* 1462 * Find an IPv6 interface link-local address specific to an interface. 1463 * ifaddr is returned referenced. 1464 */ 1465 struct in6_ifaddr * 1466 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1467 { 1468 struct ifaddr *ifa; 1469 1470 IF_ADDR_RLOCK(ifp); 1471 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1472 if (ifa->ifa_addr->sa_family != AF_INET6) 1473 continue; 1474 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1475 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1476 ignoreflags) != 0) 1477 continue; 1478 ifa_ref(ifa); 1479 break; 1480 } 1481 } 1482 IF_ADDR_RUNLOCK(ifp); 1483 1484 return ((struct in6_ifaddr *)ifa); 1485 } 1486 1487 1488 /* 1489 * find the internet address corresponding to a given address. 1490 * ifaddr is returned referenced. 1491 */ 1492 struct in6_ifaddr * 1493 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1494 { 1495 struct rm_priotracker in6_ifa_tracker; 1496 struct in6_ifaddr *ia; 1497 1498 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1499 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1500 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1501 if (zoneid != 0 && 1502 zoneid != ia->ia_addr.sin6_scope_id) 1503 continue; 1504 ifa_ref(&ia->ia_ifa); 1505 break; 1506 } 1507 } 1508 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1509 return (ia); 1510 } 1511 1512 /* 1513 * find the internet address corresponding to a given interface and address. 1514 * ifaddr is returned referenced. 1515 */ 1516 struct in6_ifaddr * 1517 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr) 1518 { 1519 struct ifaddr *ifa; 1520 1521 IF_ADDR_RLOCK(ifp); 1522 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1523 if (ifa->ifa_addr->sa_family != AF_INET6) 1524 continue; 1525 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1526 ifa_ref(ifa); 1527 break; 1528 } 1529 } 1530 IF_ADDR_RUNLOCK(ifp); 1531 1532 return ((struct in6_ifaddr *)ifa); 1533 } 1534 1535 /* 1536 * Find a link-local scoped address on ifp and return it if any. 1537 */ 1538 struct in6_ifaddr * 1539 in6ifa_llaonifp(struct ifnet *ifp) 1540 { 1541 struct sockaddr_in6 *sin6; 1542 struct ifaddr *ifa; 1543 1544 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1545 return (NULL); 1546 IF_ADDR_RLOCK(ifp); 1547 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1548 if (ifa->ifa_addr->sa_family != AF_INET6) 1549 continue; 1550 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1551 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1552 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1553 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1554 break; 1555 } 1556 IF_ADDR_RUNLOCK(ifp); 1557 1558 return ((struct in6_ifaddr *)ifa); 1559 } 1560 1561 /* 1562 * Convert IP6 address to printable (loggable) representation. Caller 1563 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1564 */ 1565 static char digits[] = "0123456789abcdef"; 1566 char * 1567 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1568 { 1569 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1570 char *cp; 1571 const u_int16_t *a = (const u_int16_t *)addr; 1572 const u_int8_t *d; 1573 int dcolon = 0, zero = 0; 1574 1575 cp = ip6buf; 1576 1577 for (i = 0; i < 8; i++) { 1578 if (*(a + i) == 0) { 1579 cnt++; 1580 if (cnt == 1) 1581 idx = i; 1582 } 1583 else if (maxcnt < cnt) { 1584 maxcnt = cnt; 1585 index = idx; 1586 cnt = 0; 1587 } 1588 } 1589 if (maxcnt < cnt) { 1590 maxcnt = cnt; 1591 index = idx; 1592 } 1593 1594 for (i = 0; i < 8; i++) { 1595 if (dcolon == 1) { 1596 if (*a == 0) { 1597 if (i == 7) 1598 *cp++ = ':'; 1599 a++; 1600 continue; 1601 } else 1602 dcolon = 2; 1603 } 1604 if (*a == 0) { 1605 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1606 if (i == 0) 1607 *cp++ = ':'; 1608 *cp++ = ':'; 1609 dcolon = 1; 1610 } else { 1611 *cp++ = '0'; 1612 *cp++ = ':'; 1613 } 1614 a++; 1615 continue; 1616 } 1617 d = (const u_char *)a; 1618 /* Try to eliminate leading zeros in printout like in :0001. */ 1619 zero = 1; 1620 *cp = digits[*d >> 4]; 1621 if (*cp != '0') { 1622 zero = 0; 1623 cp++; 1624 } 1625 *cp = digits[*d++ & 0xf]; 1626 if (zero == 0 || (*cp != '0')) { 1627 zero = 0; 1628 cp++; 1629 } 1630 *cp = digits[*d >> 4]; 1631 if (zero == 0 || (*cp != '0')) { 1632 zero = 0; 1633 cp++; 1634 } 1635 *cp++ = digits[*d & 0xf]; 1636 *cp++ = ':'; 1637 a++; 1638 } 1639 *--cp = '\0'; 1640 return (ip6buf); 1641 } 1642 1643 int 1644 in6_localaddr(struct in6_addr *in6) 1645 { 1646 struct rm_priotracker in6_ifa_tracker; 1647 struct in6_ifaddr *ia; 1648 1649 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1650 return 1; 1651 1652 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1653 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1654 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1655 &ia->ia_prefixmask.sin6_addr)) { 1656 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1657 return 1; 1658 } 1659 } 1660 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1661 1662 return (0); 1663 } 1664 1665 /* 1666 * Return 1 if an internet address is for the local host and configured 1667 * on one of its interfaces. 1668 */ 1669 int 1670 in6_localip(struct in6_addr *in6) 1671 { 1672 struct rm_priotracker in6_ifa_tracker; 1673 struct in6_ifaddr *ia; 1674 1675 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1676 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1677 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1678 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1679 return (1); 1680 } 1681 } 1682 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1683 return (0); 1684 } 1685 1686 /* 1687 * Return 1 if an internet address is configured on an interface. 1688 */ 1689 int 1690 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr) 1691 { 1692 struct in6_addr in6; 1693 struct ifaddr *ifa; 1694 struct in6_ifaddr *ia6; 1695 1696 in6 = *addr; 1697 if (in6_clearscope(&in6)) 1698 return (0); 1699 in6_setscope(&in6, ifp, NULL); 1700 1701 IF_ADDR_RLOCK(ifp); 1702 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1703 if (ifa->ifa_addr->sa_family != AF_INET6) 1704 continue; 1705 ia6 = (struct in6_ifaddr *)ifa; 1706 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) { 1707 IF_ADDR_RUNLOCK(ifp); 1708 return (1); 1709 } 1710 } 1711 IF_ADDR_RUNLOCK(ifp); 1712 1713 return (0); 1714 } 1715 1716 int 1717 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1718 { 1719 struct rm_priotracker in6_ifa_tracker; 1720 struct in6_ifaddr *ia; 1721 1722 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1723 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1724 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1725 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1726 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1727 return (1); /* true */ 1728 } 1729 break; 1730 } 1731 } 1732 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1733 1734 return (0); /* false */ 1735 } 1736 1737 /* 1738 * return length of part which dst and src are equal 1739 * hard coding... 1740 */ 1741 int 1742 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1743 { 1744 int match = 0; 1745 u_char *s = (u_char *)src, *d = (u_char *)dst; 1746 u_char *lim = s + 16, r; 1747 1748 while (s < lim) 1749 if ((r = (*d++ ^ *s++)) != 0) { 1750 while (r < 128) { 1751 match++; 1752 r <<= 1; 1753 } 1754 break; 1755 } else 1756 match += 8; 1757 return match; 1758 } 1759 1760 /* XXX: to be scope conscious */ 1761 int 1762 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1763 { 1764 int bytelen, bitlen; 1765 1766 /* sanity check */ 1767 if (0 > len || len > 128) { 1768 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1769 len); 1770 return (0); 1771 } 1772 1773 bytelen = len / 8; 1774 bitlen = len % 8; 1775 1776 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1777 return (0); 1778 if (bitlen != 0 && 1779 p1->s6_addr[bytelen] >> (8 - bitlen) != 1780 p2->s6_addr[bytelen] >> (8 - bitlen)) 1781 return (0); 1782 1783 return (1); 1784 } 1785 1786 void 1787 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1788 { 1789 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1790 int bytelen, bitlen, i; 1791 1792 /* sanity check */ 1793 if (0 > len || len > 128) { 1794 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1795 len); 1796 return; 1797 } 1798 1799 bzero(maskp, sizeof(*maskp)); 1800 bytelen = len / 8; 1801 bitlen = len % 8; 1802 for (i = 0; i < bytelen; i++) 1803 maskp->s6_addr[i] = 0xff; 1804 if (bitlen) 1805 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1806 } 1807 1808 /* 1809 * return the best address out of the same scope. if no address was 1810 * found, return the first valid address from designated IF. 1811 */ 1812 struct in6_ifaddr * 1813 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1814 { 1815 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1816 struct ifaddr *ifa; 1817 struct in6_ifaddr *besta = NULL; 1818 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1819 1820 dep[0] = dep[1] = NULL; 1821 1822 /* 1823 * We first look for addresses in the same scope. 1824 * If there is one, return it. 1825 * If two or more, return one which matches the dst longest. 1826 * If none, return one of global addresses assigned other ifs. 1827 */ 1828 IF_ADDR_RLOCK(ifp); 1829 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1830 if (ifa->ifa_addr->sa_family != AF_INET6) 1831 continue; 1832 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1833 continue; /* XXX: is there any case to allow anycast? */ 1834 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1835 continue; /* don't use this interface */ 1836 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1837 continue; 1838 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1839 if (V_ip6_use_deprecated) 1840 dep[0] = (struct in6_ifaddr *)ifa; 1841 continue; 1842 } 1843 1844 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1845 /* 1846 * call in6_matchlen() as few as possible 1847 */ 1848 if (besta) { 1849 if (blen == -1) 1850 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1851 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1852 if (tlen > blen) { 1853 blen = tlen; 1854 besta = (struct in6_ifaddr *)ifa; 1855 } 1856 } else 1857 besta = (struct in6_ifaddr *)ifa; 1858 } 1859 } 1860 if (besta) { 1861 ifa_ref(&besta->ia_ifa); 1862 IF_ADDR_RUNLOCK(ifp); 1863 return (besta); 1864 } 1865 1866 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1867 if (ifa->ifa_addr->sa_family != AF_INET6) 1868 continue; 1869 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1870 continue; /* XXX: is there any case to allow anycast? */ 1871 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1872 continue; /* don't use this interface */ 1873 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1874 continue; 1875 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1876 if (V_ip6_use_deprecated) 1877 dep[1] = (struct in6_ifaddr *)ifa; 1878 continue; 1879 } 1880 1881 if (ifa != NULL) 1882 ifa_ref(ifa); 1883 IF_ADDR_RUNLOCK(ifp); 1884 return (struct in6_ifaddr *)ifa; 1885 } 1886 1887 /* use the last-resort values, that are, deprecated addresses */ 1888 if (dep[0]) { 1889 ifa_ref((struct ifaddr *)dep[0]); 1890 IF_ADDR_RUNLOCK(ifp); 1891 return dep[0]; 1892 } 1893 if (dep[1]) { 1894 ifa_ref((struct ifaddr *)dep[1]); 1895 IF_ADDR_RUNLOCK(ifp); 1896 return dep[1]; 1897 } 1898 1899 IF_ADDR_RUNLOCK(ifp); 1900 return NULL; 1901 } 1902 1903 /* 1904 * perform DAD when interface becomes IFF_UP. 1905 */ 1906 void 1907 in6_if_up(struct ifnet *ifp) 1908 { 1909 struct ifaddr *ifa; 1910 struct in6_ifaddr *ia; 1911 1912 IF_ADDR_RLOCK(ifp); 1913 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1914 if (ifa->ifa_addr->sa_family != AF_INET6) 1915 continue; 1916 ia = (struct in6_ifaddr *)ifa; 1917 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1918 /* 1919 * The TENTATIVE flag was likely set by hand 1920 * beforehand, implicitly indicating the need for DAD. 1921 * We may be able to skip the random delay in this 1922 * case, but we impose delays just in case. 1923 */ 1924 nd6_dad_start(ifa, 1925 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1926 } 1927 } 1928 IF_ADDR_RUNLOCK(ifp); 1929 1930 /* 1931 * special cases, like 6to4, are handled in in6_ifattach 1932 */ 1933 in6_ifattach(ifp, NULL); 1934 } 1935 1936 int 1937 in6if_do_dad(struct ifnet *ifp) 1938 { 1939 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1940 return (0); 1941 1942 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) || 1943 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD)) 1944 return (0); 1945 1946 /* 1947 * Our DAD routine requires the interface up and running. 1948 * However, some interfaces can be up before the RUNNING 1949 * status. Additionally, users may try to assign addresses 1950 * before the interface becomes up (or running). 1951 * This function returns EAGAIN in that case. 1952 * The caller should mark "tentative" on the address instead of 1953 * performing DAD immediately. 1954 */ 1955 if (!((ifp->if_flags & IFF_UP) && 1956 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 1957 return (EAGAIN); 1958 1959 return (1); 1960 } 1961 1962 /* 1963 * Calculate max IPv6 MTU through all the interfaces and store it 1964 * to in6_maxmtu. 1965 */ 1966 void 1967 in6_setmaxmtu(void) 1968 { 1969 unsigned long maxmtu = 0; 1970 struct ifnet *ifp; 1971 1972 IFNET_RLOCK_NOSLEEP(); 1973 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1974 /* this function can be called during ifnet initialization */ 1975 if (!ifp->if_afdata[AF_INET6]) 1976 continue; 1977 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 1978 IN6_LINKMTU(ifp) > maxmtu) 1979 maxmtu = IN6_LINKMTU(ifp); 1980 } 1981 IFNET_RUNLOCK_NOSLEEP(); 1982 if (maxmtu) /* update only when maxmtu is positive */ 1983 V_in6_maxmtu = maxmtu; 1984 } 1985 1986 /* 1987 * Provide the length of interface identifiers to be used for the link attached 1988 * to the given interface. The length should be defined in "IPv6 over 1989 * xxx-link" document. Note that address architecture might also define 1990 * the length for a particular set of address prefixes, regardless of the 1991 * link type. As clarified in rfc2462bis, those two definitions should be 1992 * consistent, and those really are as of August 2004. 1993 */ 1994 int 1995 in6_if2idlen(struct ifnet *ifp) 1996 { 1997 switch (ifp->if_type) { 1998 case IFT_ETHER: /* RFC2464 */ 1999 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2000 case IFT_L2VLAN: /* ditto */ 2001 case IFT_IEEE80211: /* ditto */ 2002 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */ 2003 case IFT_INFINIBAND: 2004 return (64); 2005 case IFT_FDDI: /* RFC2467 */ 2006 return (64); 2007 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2008 return (64); 2009 case IFT_PPP: /* RFC2472 */ 2010 return (64); 2011 case IFT_ARCNET: /* RFC2497 */ 2012 return (64); 2013 case IFT_FRELAY: /* RFC2590 */ 2014 return (64); 2015 case IFT_IEEE1394: /* RFC3146 */ 2016 return (64); 2017 case IFT_GIF: 2018 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2019 case IFT_LOOP: 2020 return (64); /* XXX: is this really correct? */ 2021 default: 2022 /* 2023 * Unknown link type: 2024 * It might be controversial to use the today's common constant 2025 * of 64 for these cases unconditionally. For full compliance, 2026 * we should return an error in this case. On the other hand, 2027 * if we simply miss the standard for the link type or a new 2028 * standard is defined for a new link type, the IFID length 2029 * is very likely to be the common constant. As a compromise, 2030 * we always use the constant, but make an explicit notice 2031 * indicating the "unknown" case. 2032 */ 2033 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2034 return (64); 2035 } 2036 } 2037 2038 #include <sys/sysctl.h> 2039 2040 struct in6_llentry { 2041 struct llentry base; 2042 }; 2043 2044 #define IN6_LLTBL_DEFAULT_HSIZE 32 2045 #define IN6_LLTBL_HASH(k, h) \ 2046 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1)) 2047 2048 /* 2049 * Do actual deallocation of @lle. 2050 */ 2051 static void 2052 in6_lltable_destroy_lle_unlocked(struct llentry *lle) 2053 { 2054 2055 LLE_LOCK_DESTROY(lle); 2056 LLE_REQ_DESTROY(lle); 2057 free(lle, M_LLTABLE); 2058 } 2059 2060 /* 2061 * Called by LLE_FREE_LOCKED when number of references 2062 * drops to zero. 2063 */ 2064 static void 2065 in6_lltable_destroy_lle(struct llentry *lle) 2066 { 2067 2068 LLE_WUNLOCK(lle); 2069 in6_lltable_destroy_lle_unlocked(lle); 2070 } 2071 2072 static struct llentry * 2073 in6_lltable_new(const struct in6_addr *addr6, u_int flags) 2074 { 2075 struct in6_llentry *lle; 2076 2077 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2078 if (lle == NULL) /* NB: caller generates msg */ 2079 return NULL; 2080 2081 lle->base.r_l3addr.addr6 = *addr6; 2082 lle->base.lle_refcnt = 1; 2083 lle->base.lle_free = in6_lltable_destroy_lle; 2084 LLE_LOCK_INIT(&lle->base); 2085 LLE_REQ_INIT(&lle->base); 2086 callout_init(&lle->base.lle_timer, 1); 2087 2088 return (&lle->base); 2089 } 2090 2091 static int 2092 in6_lltable_match_prefix(const struct sockaddr *saddr, 2093 const struct sockaddr *smask, u_int flags, struct llentry *lle) 2094 { 2095 const struct in6_addr *addr, *mask, *lle_addr; 2096 2097 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr; 2098 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr; 2099 lle_addr = &lle->r_l3addr.addr6; 2100 2101 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0) 2102 return (0); 2103 2104 if (lle->la_flags & LLE_IFADDR) { 2105 2106 /* 2107 * Delete LLE_IFADDR records IFF address & flag matches. 2108 * Note that addr is the interface address within prefix 2109 * being matched. 2110 */ 2111 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) && 2112 (flags & LLE_STATIC) != 0) 2113 return (1); 2114 return (0); 2115 } 2116 2117 /* flags & LLE_STATIC means deleting both dynamic and static entries */ 2118 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 2119 return (1); 2120 2121 return (0); 2122 } 2123 2124 static void 2125 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle) 2126 { 2127 struct ifnet *ifp; 2128 2129 LLE_WLOCK_ASSERT(lle); 2130 KASSERT(llt != NULL, ("lltable is NULL")); 2131 2132 /* Unlink entry from table */ 2133 if ((lle->la_flags & LLE_LINKED) != 0) { 2134 2135 ifp = llt->llt_ifp; 2136 IF_AFDATA_WLOCK_ASSERT(ifp); 2137 lltable_unlink_entry(llt, lle); 2138 } 2139 2140 if (callout_stop(&lle->lle_timer) > 0) 2141 LLE_REMREF(lle); 2142 2143 llentry_free(lle); 2144 } 2145 2146 static int 2147 in6_lltable_rtcheck(struct ifnet *ifp, 2148 u_int flags, 2149 const struct sockaddr *l3addr) 2150 { 2151 const struct sockaddr_in6 *sin6; 2152 struct nhop6_basic nh6; 2153 struct in6_addr dst; 2154 uint32_t scopeid; 2155 int error; 2156 char ip6buf[INET6_ADDRSTRLEN]; 2157 2158 KASSERT(l3addr->sa_family == AF_INET6, 2159 ("sin_family %d", l3addr->sa_family)); 2160 2161 /* Our local addresses are always only installed on the default FIB. */ 2162 2163 sin6 = (const struct sockaddr_in6 *)l3addr; 2164 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid); 2165 error = fib6_lookup_nh_basic(RT_DEFAULT_FIB, &dst, scopeid, 0, 0, &nh6); 2166 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) { 2167 struct ifaddr *ifa; 2168 /* 2169 * Create an ND6 cache for an IPv6 neighbor 2170 * that is not covered by our own prefix. 2171 */ 2172 ifa = ifaof_ifpforaddr(l3addr, ifp); 2173 if (ifa != NULL) { 2174 ifa_free(ifa); 2175 return 0; 2176 } 2177 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2178 ip6_sprintf(ip6buf, &sin6->sin6_addr)); 2179 return EINVAL; 2180 } 2181 return 0; 2182 } 2183 2184 static inline uint32_t 2185 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize) 2186 { 2187 2188 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize)); 2189 } 2190 2191 static uint32_t 2192 in6_lltable_hash(const struct llentry *lle, uint32_t hsize) 2193 { 2194 2195 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize)); 2196 } 2197 2198 static void 2199 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 2200 { 2201 struct sockaddr_in6 *sin6; 2202 2203 sin6 = (struct sockaddr_in6 *)sa; 2204 bzero(sin6, sizeof(*sin6)); 2205 sin6->sin6_family = AF_INET6; 2206 sin6->sin6_len = sizeof(*sin6); 2207 sin6->sin6_addr = lle->r_l3addr.addr6; 2208 } 2209 2210 static inline struct llentry * 2211 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst) 2212 { 2213 struct llentry *lle; 2214 struct llentries *lleh; 2215 u_int hashidx; 2216 2217 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize); 2218 lleh = &llt->lle_head[hashidx]; 2219 LIST_FOREACH(lle, lleh, lle_next) { 2220 if (lle->la_flags & LLE_DELETED) 2221 continue; 2222 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst)) 2223 break; 2224 } 2225 2226 return (lle); 2227 } 2228 2229 static void 2230 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 2231 { 2232 2233 lle->la_flags |= LLE_DELETED; 2234 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 2235 #ifdef DIAGNOSTIC 2236 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2237 #endif 2238 llentry_free(lle); 2239 } 2240 2241 static struct llentry * 2242 in6_lltable_alloc(struct lltable *llt, u_int flags, 2243 const struct sockaddr *l3addr) 2244 { 2245 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2246 struct ifnet *ifp = llt->llt_ifp; 2247 struct llentry *lle; 2248 char linkhdr[LLE_MAX_LINKHDR]; 2249 size_t linkhdrsize; 2250 int lladdr_off; 2251 2252 KASSERT(l3addr->sa_family == AF_INET6, 2253 ("sin_family %d", l3addr->sa_family)); 2254 2255 /* 2256 * A route that covers the given address must have 2257 * been installed 1st because we are doing a resolution, 2258 * verify this. 2259 */ 2260 if (!(flags & LLE_IFADDR) && 2261 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2262 return (NULL); 2263 2264 lle = in6_lltable_new(&sin6->sin6_addr, flags); 2265 if (lle == NULL) { 2266 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2267 return (NULL); 2268 } 2269 lle->la_flags = flags; 2270 if ((flags & LLE_IFADDR) == LLE_IFADDR) { 2271 linkhdrsize = LLE_MAX_LINKHDR; 2272 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp), 2273 linkhdr, &linkhdrsize, &lladdr_off) != 0) { 2274 in6_lltable_destroy_lle_unlocked(lle); 2275 return (NULL); 2276 } 2277 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, 2278 lladdr_off); 2279 lle->la_flags |= LLE_STATIC; 2280 } 2281 2282 if ((lle->la_flags & LLE_STATIC) != 0) 2283 lle->ln_state = ND6_LLINFO_REACHABLE; 2284 2285 return (lle); 2286 } 2287 2288 static struct llentry * 2289 in6_lltable_lookup(struct lltable *llt, u_int flags, 2290 const struct sockaddr *l3addr) 2291 { 2292 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2293 struct llentry *lle; 2294 2295 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 2296 KASSERT(l3addr->sa_family == AF_INET6, 2297 ("sin_family %d", l3addr->sa_family)); 2298 2299 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr); 2300 2301 if (lle == NULL) 2302 return (NULL); 2303 2304 KASSERT((flags & (LLE_UNLOCKED|LLE_EXCLUSIVE)) != 2305 (LLE_UNLOCKED|LLE_EXCLUSIVE),("wrong lle request flags: 0x%X", 2306 flags)); 2307 2308 if (flags & LLE_UNLOCKED) 2309 return (lle); 2310 2311 if (flags & LLE_EXCLUSIVE) 2312 LLE_WLOCK(lle); 2313 else 2314 LLE_RLOCK(lle); 2315 return (lle); 2316 } 2317 2318 static int 2319 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 2320 struct sysctl_req *wr) 2321 { 2322 struct ifnet *ifp = llt->llt_ifp; 2323 /* XXX stack use */ 2324 struct { 2325 struct rt_msghdr rtm; 2326 struct sockaddr_in6 sin6; 2327 /* 2328 * ndp.c assumes that sdl is word aligned 2329 */ 2330 #ifdef __LP64__ 2331 uint32_t pad; 2332 #endif 2333 struct sockaddr_dl sdl; 2334 } ndpc; 2335 struct sockaddr_dl *sdl; 2336 int error; 2337 2338 bzero(&ndpc, sizeof(ndpc)); 2339 /* skip deleted entries */ 2340 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 2341 return (0); 2342 /* Skip if jailed and not a valid IP of the prison. */ 2343 lltable_fill_sa_entry(lle, 2344 (struct sockaddr *)&ndpc.sin6); 2345 if (prison_if(wr->td->td_ucred, 2346 (struct sockaddr *)&ndpc.sin6) != 0) 2347 return (0); 2348 /* 2349 * produce a msg made of: 2350 * struct rt_msghdr; 2351 * struct sockaddr_in6 (IPv6) 2352 * struct sockaddr_dl; 2353 */ 2354 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2355 ndpc.rtm.rtm_version = RTM_VERSION; 2356 ndpc.rtm.rtm_type = RTM_GET; 2357 ndpc.rtm.rtm_flags = RTF_UP; 2358 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2359 if (V_deembed_scopeid) 2360 sa6_recoverscope(&ndpc.sin6); 2361 2362 /* publish */ 2363 if (lle->la_flags & LLE_PUB) 2364 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2365 2366 sdl = &ndpc.sdl; 2367 sdl->sdl_family = AF_LINK; 2368 sdl->sdl_len = sizeof(*sdl); 2369 sdl->sdl_alen = ifp->if_addrlen; 2370 sdl->sdl_index = ifp->if_index; 2371 sdl->sdl_type = ifp->if_type; 2372 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2373 if (lle->la_expire != 0) 2374 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire + 2375 lle->lle_remtime / hz + 2376 time_second - time_uptime; 2377 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2378 if (lle->la_flags & LLE_STATIC) 2379 ndpc.rtm.rtm_flags |= RTF_STATIC; 2380 if (lle->la_flags & LLE_IFADDR) 2381 ndpc.rtm.rtm_flags |= RTF_PINNED; 2382 if (lle->ln_router != 0) 2383 ndpc.rtm.rtm_flags |= RTF_GATEWAY; 2384 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked; 2385 /* Store state in rmx_weight value */ 2386 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state; 2387 ndpc.rtm.rtm_index = ifp->if_index; 2388 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2389 2390 return (error); 2391 } 2392 2393 static struct lltable * 2394 in6_lltattach(struct ifnet *ifp) 2395 { 2396 struct lltable *llt; 2397 2398 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE); 2399 llt->llt_af = AF_INET6; 2400 llt->llt_ifp = ifp; 2401 2402 llt->llt_lookup = in6_lltable_lookup; 2403 llt->llt_alloc_entry = in6_lltable_alloc; 2404 llt->llt_delete_entry = in6_lltable_delete_entry; 2405 llt->llt_dump_entry = in6_lltable_dump_entry; 2406 llt->llt_hash = in6_lltable_hash; 2407 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry; 2408 llt->llt_free_entry = in6_lltable_free_entry; 2409 llt->llt_match_prefix = in6_lltable_match_prefix; 2410 lltable_link(llt); 2411 2412 return (llt); 2413 } 2414 2415 void * 2416 in6_domifattach(struct ifnet *ifp) 2417 { 2418 struct in6_ifextra *ext; 2419 2420 /* There are not IPv6-capable interfaces. */ 2421 switch (ifp->if_type) { 2422 case IFT_PFLOG: 2423 case IFT_PFSYNC: 2424 case IFT_USB: 2425 return (NULL); 2426 } 2427 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2428 bzero(ext, sizeof(*ext)); 2429 2430 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2431 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2432 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2433 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2434 2435 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2436 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2437 M_WAITOK); 2438 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2439 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2440 2441 ext->nd_ifinfo = nd6_ifattach(ifp); 2442 ext->scope6_id = scope6_ifattach(ifp); 2443 ext->lltable = in6_lltattach(ifp); 2444 2445 ext->mld_ifinfo = mld_domifattach(ifp); 2446 2447 return ext; 2448 } 2449 2450 int 2451 in6_domifmtu(struct ifnet *ifp) 2452 { 2453 if (ifp->if_afdata[AF_INET6] == NULL) 2454 return ifp->if_mtu; 2455 2456 return (IN6_LINKMTU(ifp)); 2457 } 2458 2459 void 2460 in6_domifdetach(struct ifnet *ifp, void *aux) 2461 { 2462 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2463 2464 mld_domifdetach(ifp); 2465 scope6_ifdetach(ext->scope6_id); 2466 nd6_ifdetach(ext->nd_ifinfo); 2467 lltable_free(ext->lltable); 2468 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2469 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2470 free(ext->in6_ifstat, M_IFADDR); 2471 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2472 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2473 free(ext->icmp6_ifstat, M_IFADDR); 2474 free(ext, M_IFADDR); 2475 } 2476 2477 /* 2478 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2479 * v4 mapped addr or v4 compat addr 2480 */ 2481 void 2482 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2483 { 2484 2485 bzero(sin, sizeof(*sin)); 2486 sin->sin_len = sizeof(struct sockaddr_in); 2487 sin->sin_family = AF_INET; 2488 sin->sin_port = sin6->sin6_port; 2489 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2490 } 2491 2492 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2493 void 2494 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2495 { 2496 bzero(sin6, sizeof(*sin6)); 2497 sin6->sin6_len = sizeof(struct sockaddr_in6); 2498 sin6->sin6_family = AF_INET6; 2499 sin6->sin6_port = sin->sin_port; 2500 sin6->sin6_addr.s6_addr32[0] = 0; 2501 sin6->sin6_addr.s6_addr32[1] = 0; 2502 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2503 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2504 } 2505 2506 /* Convert sockaddr_in6 into sockaddr_in. */ 2507 void 2508 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2509 { 2510 struct sockaddr_in *sin_p; 2511 struct sockaddr_in6 sin6; 2512 2513 /* 2514 * Save original sockaddr_in6 addr and convert it 2515 * to sockaddr_in. 2516 */ 2517 sin6 = *(struct sockaddr_in6 *)nam; 2518 sin_p = (struct sockaddr_in *)nam; 2519 in6_sin6_2_sin(sin_p, &sin6); 2520 } 2521 2522 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2523 void 2524 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2525 { 2526 struct sockaddr_in *sin_p; 2527 struct sockaddr_in6 *sin6_p; 2528 2529 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2530 sin_p = (struct sockaddr_in *)*nam; 2531 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2532 free(*nam, M_SONAME); 2533 *nam = (struct sockaddr *)sin6_p; 2534 } 2535