in6.c revision 121742
1252661Snp/* $FreeBSD: head/sys/netinet6/in6.c 121742 2003-10-30 15:29:17Z ume $ */ 2252661Snp/* $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ */ 3319269Snp 4252661Snp/* 5285527Snp * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6285527Snp * All rights reserved. 7285527Snp * 8252661Snp * Redistribution and use in source and binary forms, with or without 9285527Snp * modification, are permitted provided that the following conditions 10285527Snp * are met: 11252661Snp * 1. Redistributions of source code must retain the above copyright 12285527Snp * notice, this list of conditions and the following disclaimer. 13285527Snp * 2. Redistributions in binary form must reproduce the above copyright 14285527Snp * notice, this list of conditions and the following disclaimer in the 15285527Snp * documentation and/or other materials provided with the distribution. 16252661Snp * 3. Neither the name of the project nor the names of its contributors 17285527Snp * may be used to endorse or promote products derived from this software 18285527Snp * without specific prior written permission. 19252661Snp * 20252661Snp * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21298976Spfg * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22285527Snp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23285527Snp * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24285527Snp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25285527Snp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26252661Snp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27252661Snp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28252661Snp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29252661Snp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30252661Snp * SUCH DAMAGE. 31285527Snp */ 32252661Snp 33252661Snp/* 34252661Snp * Copyright (c) 1982, 1986, 1991, 1993 35252661Snp * The Regents of the University of California. All rights reserved. 36252661Snp * 37252661Snp * Redistribution and use in source and binary forms, with or without 38252661Snp * modification, are permitted provided that the following conditions 39252661Snp * are met: 40252661Snp * 1. Redistributions of source code must retain the above copyright 41252661Snp * notice, this list of conditions and the following disclaimer. 42252661Snp * 2. Redistributions in binary form must reproduce the above copyright 43252661Snp * notice, this list of conditions and the following disclaimer in the 44252661Snp * documentation and/or other materials provided with the distribution. 45252661Snp * 3. All advertising materials mentioning features or use of this software 46252661Snp * must display the following acknowledgement: 47252661Snp * This product includes software developed by the University of 48252661Snp * California, Berkeley and its contributors. 49252661Snp * 4. Neither the name of the University nor the names of its contributors 50252661Snp * may be used to endorse or promote products derived from this software 51252661Snp * without specific prior written permission. 52285527Snp * 53285527Snp * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54285527Snp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55285527Snp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56252661Snp * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57252661Snp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58252661Snp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59252661Snp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60252661Snp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61252661Snp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62252661Snp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63252661Snp * SUCH DAMAGE. 64252661Snp * 65252661Snp * @(#)in.c 8.2 (Berkeley) 11/15/93 66285527Snp */ 67252661Snp 68252661Snp#include "opt_inet.h" 69252661Snp#include "opt_inet6.h" 70252661Snp 71252661Snp#include <sys/param.h> 72252661Snp#include <sys/errno.h> 73252661Snp#include <sys/malloc.h> 74252661Snp#include <sys/socket.h> 75252661Snp#include <sys/socketvar.h> 76252661Snp#include <sys/sockio.h> 77252661Snp#include <sys/systm.h> 78252661Snp#include <sys/proc.h> 79252661Snp#include <sys/time.h> 80252661Snp#include <sys/kernel.h> 81252661Snp#include <sys/syslog.h> 82252661Snp 83252661Snp#include <net/if.h> 84252661Snp#include <net/if_types.h> 85252661Snp#include <net/route.h> 86252661Snp#include <net/if_dl.h> 87252661Snp 88252661Snp#include <netinet/in.h> 89252661Snp#include <netinet/in_var.h> 90252661Snp#include <netinet/if_ether.h> 91252661Snp#include <netinet/in_systm.h> 92252661Snp#include <netinet/ip.h> 93252661Snp#include <netinet/in_pcb.h> 94311506Snp 95311506Snp#include <netinet/ip6.h> 96252661Snp#include <netinet6/ip6_var.h> 97252661Snp#include <netinet6/nd6.h> 98252661Snp#include <netinet6/mld6_var.h> 99252661Snp#include <netinet6/ip6_mroute.h> 100252661Snp#include <netinet6/in6_ifattach.h> 101252661Snp#include <netinet6/scope6_var.h> 102252661Snp#include <netinet6/in6_pcb.h> 103252661Snp 104252661Snp#include <net/net_osdep.h> 105252661Snp 106252661SnpMALLOC_DEFINE(M_IPMADDR, "in6_multi", "internet multicast address"); 107252661Snp 108252661Snp/* 109252661Snp * Definitions of some costant IP6 addresses. 110252661Snp */ 111252661Snpconst struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 112252661Snpconst struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 113252661Snpconst struct in6_addr in6addr_nodelocal_allnodes = 114252661Snp IN6ADDR_NODELOCAL_ALLNODES_INIT; 115252661Snpconst struct in6_addr in6addr_linklocal_allnodes = 116252661Snp IN6ADDR_LINKLOCAL_ALLNODES_INIT; 117252661Snpconst struct in6_addr in6addr_linklocal_allrouters = 118252661Snp IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 119252661Snp 120252661Snpconst struct in6_addr in6mask0 = IN6MASK0; 121252661Snpconst struct in6_addr in6mask32 = IN6MASK32; 122256459Snpconst struct in6_addr in6mask64 = IN6MASK64; 123256459Snpconst struct in6_addr in6mask96 = IN6MASK96; 124256459Snpconst struct in6_addr in6mask128 = IN6MASK128; 125296249Snp 126296249Snpconst struct sockaddr_in6 sa6_any = {sizeof(sa6_any), AF_INET6, 127296249Snp 0, 0, IN6ADDR_ANY_INIT, 0}; 128296249Snp 129296249Snpstatic int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t, 130296249Snp struct ifnet *, struct thread *)); 131285527Snpstatic int in6_ifinit __P((struct ifnet *, struct in6_ifaddr *, 132252661Snp struct sockaddr_in6 *, int)); 133256459Snpstatic void in6_unlink_ifa __P((struct in6_ifaddr *, struct ifnet *)); 134256459Snp 135256459Snpstruct in6_multihead in6_multihead; /* XXX BSS initialization */ 136256459Snpint (*faithprefix_p)(struct in6_addr *); 137256459Snp 138256459Snp/* 139285527Snp * Subroutine for in6_ifaddloop() and in6_ifremloop(). 140256459Snp * This routine does actual work. 141256459Snp */ 142252661Snpstatic void 143252661Snpin6_ifloop_request(int cmd, struct ifaddr *ifa) 144252661Snp{ 145252661Snp struct sockaddr_in6 all1_sa; 146285527Snp struct rtentry *nrt = NULL; 147252661Snp int e; 148252661Snp 149252661Snp bzero(&all1_sa, sizeof(all1_sa)); 150252661Snp all1_sa.sin6_family = AF_INET6; 151252661Snp all1_sa.sin6_len = sizeof(struct sockaddr_in6); 152252661Snp all1_sa.sin6_addr = in6mask128; 153252661Snp 154252661Snp /* 155252661Snp * We specify the address itself as the gateway, and set the 156285527Snp * RTF_LLINFO flag, so that the corresponding host route would have 157252661Snp * the flag, and thus applications that assume traditional behavior 158252661Snp * would be happy. Note that we assume the caller of the function 159252661Snp * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest, 160252661Snp * which changes the outgoing interface to the loopback interface. 161252661Snp */ 162252661Snp e = rtrequest(cmd, ifa->ifa_addr, ifa->ifa_addr, 163252661Snp (struct sockaddr *)&all1_sa, RTF_UP|RTF_HOST|RTF_LLINFO, &nrt); 164256459Snp if (e != 0) { 165256459Snp /* XXX need more descriptive message */ 166256459Snp log(LOG_ERR, "in6_ifloop_request: " 167252661Snp "%s operation failed for %s (errno=%d)\n", 168252661Snp cmd == RTM_ADD ? "ADD" : "DELETE", 169252661Snp ip6_sprintf(&((struct in6_ifaddr *)ifa)->ia_addr.sin6_addr), 170267757Snp e); 171267757Snp } 172267757Snp 173256459Snp if (nrt) { 174256459Snp RT_LOCK(nrt); 175256459Snp /* 176285527Snp * Make sure rt_ifa be equal to IFA, the second argument of 177285527Snp * the function. We need this because when we refer to 178285527Snp * rt_ifa->ia6_flags in ip6_input, we assume that the rt_ifa 179252661Snp * points to the address instead of the loopback address. 180252661Snp */ 181252661Snp if (cmd == RTM_ADD && ifa != nrt->rt_ifa) { 182256459Snp IFAFREE(nrt->rt_ifa); 183256459Snp IFAREF(ifa); 184256459Snp nrt->rt_ifa = ifa; 185256459Snp } 186296249Snp 187296249Snp /* 188296249Snp * Report the addition/removal of the address to the routing 189296249Snp * socket. 190252661Snp * 191252661Snp * XXX: since we called rtinit for a p2p interface with a 192252661Snp * destination, we end up reporting twice in such a case. 193252661Snp * Should we rather omit the second report? 194252661Snp */ 195252661Snp rt_newaddrmsg(cmd, ifa, e, nrt); 196252661Snp if (cmd == RTM_DELETE) { 197252661Snp rtfree(nrt); 198252661Snp } else { 199252661Snp /* the cmd must be RTM_ADD here */ 200252661Snp nrt->rt_refcnt--; 201252661Snp RT_UNLOCK(nrt); 202252661Snp } 203252661Snp } 204252661Snp} 205252661Snp 206252661Snp/* 207252661Snp * Add ownaddr as loopback rtentry. We previously add the route only if 208252661Snp * necessary (ex. on a p2p link). However, since we now manage addresses 209252661Snp * separately from prefixes, we should always add the route. We can't 210252661Snp * rely on the cloning mechanism from the corresponding interface route 211252661Snp * any more. 212252661Snp */ 213252661Snpstatic void 214252661Snpin6_ifaddloop(struct ifaddr *ifa) 215252661Snp{ 216252661Snp struct rtentry *rt; 217252661Snp int need_loop; 218285527Snp 219252661Snp /* If there is no loopback entry, allocate one. */ 220252661Snp rt = rtalloc1(ifa->ifa_addr, 0, 0); 221252661Snp need_loop = (rt == NULL || (rt->rt_flags & RTF_HOST) == 0 || 222252661Snp (rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0); 223252661Snp if (rt) 224252661Snp rtfree(rt); 225252661Snp if (need_loop) 226252661Snp in6_ifloop_request(RTM_ADD, ifa); 227252661Snp} 228252661Snp 229252661Snp/* 230252661Snp * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(), 231252661Snp * if it exists. 232252661Snp */ 233252661Snpstatic void 234252661Snpin6_ifremloop(struct ifaddr *ifa) 235252661Snp{ 236252661Snp struct in6_ifaddr *ia; 237252661Snp struct rtentry *rt; 238252661Snp int ia_count = 0; 239252661Snp 240252661Snp /* 241252661Snp * Some of BSD variants do not remove cloned routes 242252661Snp * from an interface direct route, when removing the direct route 243252661Snp * (see comments in net/net_osdep.h). Even for variants that do remove 244252661Snp * cloned routes, they could fail to remove the cloned routes when 245252661Snp * we handle multple addresses that share a common prefix. 246252661Snp * So, we should remove the route corresponding to the deleted address 247252661Snp * regardless of the result of in6_is_ifloop_auto(). 248252661Snp */ 249252661Snp 250252661Snp /* 251252661Snp * Delete the entry only if exact one ifa exists. More than one ifa 252252661Snp * can exist if we assign a same single address to multiple 253252661Snp * (probably p2p) interfaces. 254252661Snp * XXX: we should avoid such a configuration in IPv6... 255252661Snp */ 256252661Snp for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 257252661Snp if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ia->ia_addr.sin6_addr)) { 258252661Snp ia_count++; 259252661Snp if (ia_count > 1) 260252661Snp break; 261252661Snp } 262252661Snp } 263252661Snp 264252661Snp if (ia_count == 1) { 265252661Snp /* 266252661Snp * Before deleting, check if a corresponding loopbacked host 267252661Snp * route surely exists. With this check, we can avoid to 268252661Snp * delete an interface direct route whose destination is same 269252661Snp * as the address being removed. This can happen when removing 270252661Snp * a subnet-router anycast address on an interface attahced 271252661Snp * to a shared medium. 272252661Snp */ 273252661Snp rt = rtalloc1(ifa->ifa_addr, 0, 0); 274252661Snp if (rt != NULL) { 275252661Snp if ((rt->rt_flags & RTF_HOST) != 0 && 276252661Snp (rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) { 277252661Snp rtfree(rt); 278252661Snp in6_ifloop_request(RTM_DELETE, ifa); 279252661Snp } else 280252661Snp RT_UNLOCK(rt); 281252661Snp } 282252661Snp } 283252661Snp} 284252661Snp 285252661Snpint 286252661Snpin6_mask2len(mask, lim0) 287252661Snp struct in6_addr *mask; 288252661Snp u_char *lim0; 289252661Snp{ 290252661Snp int x = 0, y; 291252661Snp u_char *lim = lim0, *p; 292252661Snp 293252661Snp /* ignore the scope_id part */ 294252661Snp if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 295252661Snp lim = (u_char *)mask + sizeof(*mask); 296252661Snp for (p = (u_char *)mask; p < lim; x++, p++) { 297252661Snp if (*p != 0xff) 298252661Snp break; 299252661Snp } 300252661Snp y = 0; 301252661Snp if (p < lim) { 302252661Snp for (y = 0; y < 8; y++) { 303252661Snp if ((*p & (0x80 >> y)) == 0) 304252661Snp break; 305252661Snp } 306252661Snp } 307252661Snp 308252661Snp /* 309252661Snp * when the limit pointer is given, do a stricter check on the 310252661Snp * remaining bits. 311252661Snp */ 312252661Snp if (p < lim) { 313298976Spfg if (y != 0 && (*p & (0x00ff >> y)) != 0) 314252661Snp return (-1); 315252661Snp for (p = p + 1; p < lim; p++) 316252661Snp if (*p != 0) 317252661Snp return (-1); 318252661Snp } 319252661Snp 320252661Snp return x * 8 + y; 321252661Snp} 322285527Snp 323252661Snp#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 324252661Snp#define ia62ifa(ia6) (&((ia6)->ia_ifa)) 325252661Snp 326252661Snpint 327252661Snpin6_control(so, cmd, data, ifp, td) 328285527Snp struct socket *so; 329252661Snp u_long cmd; 330285527Snp caddr_t data; 331252661Snp struct ifnet *ifp; 332252661Snp struct thread *td; 333252661Snp{ 334252661Snp struct in6_ifreq *ifr = (struct in6_ifreq *)data; 335252661Snp struct in6_ifaddr *ia = NULL; 336285527Snp struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 337252661Snp int privileged; 338252661Snp 339252661Snp privileged = 0; 340252661Snp if (td == NULL || !suser(td)) 341252661Snp privileged++; 342252661Snp 343252661Snp switch (cmd) { 344252661Snp case SIOCGETSGCNT_IN6: 345252661Snp case SIOCGETMIFCNT_IN6: 346252661Snp return (mrt6_ioctl(cmd, data)); 347252661Snp } 348252661Snp 349252661Snp switch(cmd) { 350252661Snp case SIOCAADDRCTL_POLICY: 351252661Snp case SIOCDADDRCTL_POLICY: 352252661Snp if (!privileged) 353252661Snp return (EPERM); 354252661Snp return (in6_src_ioctl(cmd, data)); 355285527Snp } 356252661Snp 357252661Snp if (ifp == NULL) 358252661Snp return (EOPNOTSUPP); 359252661Snp 360252661Snp switch (cmd) { 361252661Snp case SIOCSNDFLUSH_IN6: 362252661Snp case SIOCSPFXFLUSH_IN6: 363252661Snp case SIOCSRTRFLUSH_IN6: 364252661Snp case SIOCSDEFIFACE_IN6: 365252661Snp case SIOCSIFINFO_FLAGS: 366252661Snp if (!privileged) 367252661Snp return (EPERM); 368285527Snp /* FALLTHROUGH */ 369252661Snp case OSIOCGIFINFO_IN6: 370252661Snp case SIOCGIFINFO_IN6: 371252661Snp case SIOCGDRLST_IN6: 372252661Snp case SIOCGPRLST_IN6: 373252661Snp case SIOCGNBRINFO_IN6: 374252661Snp case SIOCGDEFIFACE_IN6: 375252661Snp return (nd6_ioctl(cmd, data, ifp)); 376252661Snp } 377252661Snp 378252661Snp switch (cmd) { 379252661Snp case SIOCSIFPREFIX_IN6: 380252661Snp case SIOCDIFPREFIX_IN6: 381285527Snp case SIOCAIFPREFIX_IN6: 382252661Snp case SIOCCIFPREFIX_IN6: 383252661Snp case SIOCSGIFPREFIX_IN6: 384252661Snp case SIOCGIFPREFIX_IN6: 385252661Snp log(LOG_NOTICE, 386252661Snp "prefix ioctls are now invalidated. " 387252661Snp "please use ifconfig.\n"); 388252661Snp return (EOPNOTSUPP); 389252661Snp } 390252661Snp 391252661Snp switch (cmd) { 392252661Snp case SIOCSSCOPE6: 393252661Snp if (!privileged) 394285527Snp return (EPERM); 395252661Snp return (scope6_set(ifp, 396252661Snp (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 397252661Snp case SIOCGSCOPE6: 398252661Snp return (scope6_get(ifp, 399252661Snp (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 400252661Snp case SIOCGSCOPE6DEF: 401252661Snp return (scope6_get_default((struct scope6_id *) 402252661Snp ifr->ifr_ifru.ifru_scope_id)); 403252661Snp } 404252661Snp 405252661Snp switch (cmd) { 406252661Snp case SIOCALIFADDR: 407252661Snp case SIOCDLIFADDR: 408285527Snp if (!privileged) 409252661Snp return (EPERM); 410252661Snp /* FALLTHROUGH */ 411252661Snp case SIOCGLIFADDR: 412252661Snp return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 413252661Snp } 414252661Snp 415252661Snp /* 416252661Snp * Find address for this interface, if it exists. 417252661Snp */ 418346940Snp if (ifra->ifra_addr.sin6_family == AF_INET6) { /* XXX */ 419252661Snp struct sockaddr_in6 *sa6 = 420252661Snp (struct sockaddr_in6 *)&ifra->ifra_addr; 421252661Snp 422252661Snp if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) { 423252661Snp if (sa6->sin6_addr.s6_addr16[1] == 0) { 424252661Snp /* link ID is not embedded by the user */ 425252661Snp sa6->sin6_addr.s6_addr16[1] = 426285527Snp htons(ifp->if_index); 427252661Snp } else if (sa6->sin6_addr.s6_addr16[1] != 428252661Snp htons(ifp->if_index)) { 429252661Snp return (EINVAL); /* link ID contradicts */ 430252661Snp } 431252661Snp if (sa6->sin6_scope_id) { 432252661Snp if (sa6->sin6_scope_id != 433252661Snp (u_int32_t)ifp->if_index) 434252661Snp return (EINVAL); 435252661Snp sa6->sin6_scope_id = 0; /* XXX: good way? */ 436252661Snp } 437252661Snp } 438285527Snp ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr); 439252661Snp } 440252661Snp 441252661Snp switch (cmd) { 442252661Snp case SIOCSIFADDR_IN6: 443267757Snp case SIOCSIFDSTADDR_IN6: 444252661Snp case SIOCSIFNETMASK_IN6: 445252661Snp /* 446252661Snp * Since IPv6 allows a node to assign multiple addresses 447252661Snp * on a single interface, SIOCSIFxxx ioctls are not suitable 448252661Snp * and should be unused. 449252661Snp */ 450252661Snp /* we decided to obsolete this command (20000704) */ 451285527Snp return (EINVAL); 452252661Snp 453252661Snp case SIOCDIFADDR_IN6: 454252661Snp /* 455252661Snp * for IPv4, we look for existing in_ifaddr here to allow 456252661Snp * "ifconfig if0 delete" to remove first IPv4 address on the 457252661Snp * interface. For IPv6, as the spec allow multiple interface 458252661Snp * address from the day one, we consider "remove the first one" 459252661Snp * semantics to be not preferable. 460252661Snp */ 461252661Snp if (ia == NULL) 462252661Snp return (EADDRNOTAVAIL); 463252661Snp /* FALLTHROUGH */ 464252661Snp case SIOCAIFADDR_IN6: 465267757Snp /* 466252661Snp * We always require users to specify a valid IPv6 address for 467252661Snp * the corresponding operation. 468252661Snp */ 469252661Snp if (ifra->ifra_addr.sin6_family != AF_INET6 || 470252661Snp ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) 471252661Snp return (EAFNOSUPPORT); 472285527Snp if (!privileged) 473252661Snp return (EPERM); 474252661Snp 475252661Snp break; 476252661Snp 477252661Snp case SIOCGIFADDR_IN6: 478252661Snp /* This interface is basically deprecated. use SIOCGIFCONF. */ 479252661Snp /* FALLTHROUGH */ 480252661Snp case SIOCGIFAFLAG_IN6: 481252661Snp case SIOCGIFNETMASK_IN6: 482252661Snp case SIOCGIFDSTADDR_IN6: 483252661Snp case SIOCGIFALIFETIME_IN6: 484252661Snp /* must think again about its semantics */ 485252661Snp if (ia == NULL) 486285527Snp return (EADDRNOTAVAIL); 487252661Snp break; 488252661Snp case SIOCSIFALIFETIME_IN6: 489252661Snp { 490252661Snp struct in6_addrlifetime *lt; 491252661Snp 492252661Snp if (!privileged) 493252661Snp return (EPERM); 494252661Snp if (ia == NULL) 495252661Snp return (EADDRNOTAVAIL); 496252661Snp /* sanity for overflow - beware unsigned */ 497319269Snp lt = &ifr->ifr_ifru.ifru_lifetime; 498319269Snp if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME 499319269Snp && lt->ia6t_vltime + time_second < time_second) { 500252661Snp return EINVAL; 501252661Snp } 502252661Snp if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME 503252661Snp && lt->ia6t_pltime + time_second < time_second) { 504285527Snp return EINVAL; 505252661Snp } 506252661Snp break; 507252661Snp } 508252661Snp } 509319269Snp 510319269Snp switch (cmd) { 511319269Snp 512252661Snp case SIOCGIFADDR_IN6: 513252661Snp ifr->ifr_addr = ia->ia_addr; 514252661Snp break; 515252661Snp 516285527Snp case SIOCGIFDSTADDR_IN6: 517252661Snp if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 518252661Snp return (EINVAL); 519252661Snp /* 520252661Snp * XXX: should we check if ifa_dstaddr is NULL and return 521319269Snp * an error? 522319269Snp */ 523319269Snp ifr->ifr_dstaddr = ia->ia_dstaddr; 524252661Snp break; 525252661Snp 526252661Snp case SIOCGIFNETMASK_IN6: 527252661Snp ifr->ifr_addr = ia->ia_prefixmask; 528285527Snp break; 529252661Snp 530252661Snp case SIOCGIFAFLAG_IN6: 531252661Snp ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 532252661Snp break; 533319269Snp 534319269Snp case SIOCGIFSTAT_IN6: 535319269Snp if (ifp == NULL) 536252661Snp return EINVAL; 537252661Snp bzero(&ifr->ifr_ifru.ifru_stat, 538252661Snp sizeof(ifr->ifr_ifru.ifru_stat)); 539252661Snp ifr->ifr_ifru.ifru_stat = 540285527Snp *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat; 541252661Snp break; 542252661Snp 543252661Snp case SIOCGIFSTAT_ICMP6: 544252661Snp if (ifp == NULL) 545252661Snp return EINVAL; 546252661Snp bzero(&ifr->ifr_ifru.ifru_stat, 547252661Snp sizeof(ifr->ifr_ifru.ifru_icmp6stat)); 548252661Snp ifr->ifr_ifru.ifru_icmp6stat = 549252661Snp *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat; 550252661Snp break; 551252661Snp 552252661Snp case SIOCGIFALIFETIME_IN6: 553252661Snp ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 554252661Snp break; 555252661Snp 556252661Snp case SIOCSIFALIFETIME_IN6: 557252661Snp ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 558252661Snp /* for sanity */ 559252661Snp if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 560252661Snp ia->ia6_lifetime.ia6t_expire = 561252661Snp time_second + ia->ia6_lifetime.ia6t_vltime; 562267757Snp } else 563267757Snp ia->ia6_lifetime.ia6t_expire = 0; 564267757Snp if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 565252661Snp ia->ia6_lifetime.ia6t_preferred = 566285527Snp time_second + ia->ia6_lifetime.ia6t_pltime; 567252661Snp } else 568252661Snp ia->ia6_lifetime.ia6t_preferred = 0; 569252661Snp break; 570252661Snp 571252661Snp case SIOCAIFADDR_IN6: 572252661Snp { 573252661Snp int i, error = 0; 574267757Snp struct nd_prefix pr0, *pr; 575267757Snp 576267757Snp /* 577252661Snp * first, make or update the interface address structure, 578285527Snp * and link it to the list. 579252661Snp */ 580252661Snp if ((error = in6_update_ifa(ifp, ifra, ia)) != 0) 581252661Snp return (error); 582252661Snp 583252661Snp /* 584252661Snp * then, make the prefix on-link on the interface. 585252661Snp * XXX: we'd rather create the prefix before the address, but 586267757Snp * we need at least one address to install the corresponding 587267757Snp * interface route, so we configure the address first. 588267757Snp */ 589252661Snp 590285527Snp /* 591252661Snp * convert mask to prefix length (prefixmask has already 592252661Snp * been validated in in6_update_ifa(). 593252661Snp */ 594252661Snp bzero(&pr0, sizeof(pr0)); 595252661Snp pr0.ndpr_ifp = ifp; 596252661Snp pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 597252661Snp NULL); 598267757Snp if (pr0.ndpr_plen == 128) { 599267757Snp break; /* we don't need to install a host route. */ 600267757Snp } 601252661Snp pr0.ndpr_prefix = ifra->ifra_addr; 602285527Snp pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr; 603252661Snp /* apply the mask for safety. */ 604346940Snp for (i = 0; i < 4; i++) { 605346940Snp pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= 606252661Snp ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; 607252661Snp } 608252661Snp /* 609252661Snp * XXX: since we don't have an API to set prefix (not address) 610252661Snp * lifetimes, we just use the same lifetimes as addresses. 611252661Snp * The (temporarily) installed lifetimes can be overridden by 612252661Snp * later advertised RAs (when accept_rtadv is non 0), which is 613252661Snp * an intended behavior. 614252661Snp */ 615252661Snp pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 616252661Snp pr0.ndpr_raf_auto = 617 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 618 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 619 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 620 621 /* add the prefix if not yet. */ 622 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 623 /* 624 * nd6_prelist_add will install the corresponding 625 * interface route. 626 */ 627 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) 628 return (error); 629 if (pr == NULL) { 630 log(LOG_ERR, "nd6_prelist_add succeeded but " 631 "no prefix\n"); 632 return (EINVAL); /* XXX panic here? */ 633 } 634 } 635 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 636 == NULL) { 637 /* XXX: this should not happen! */ 638 log(LOG_ERR, "in6_control: addition succeeded, but" 639 " no ifaddr\n"); 640 } else { 641 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 && 642 ia->ia6_ndpr == NULL) { /* new autoconfed addr */ 643 ia->ia6_ndpr = pr; 644 pr->ndpr_refcnt++; 645 646 /* 647 * If this is the first autoconf address from 648 * the prefix, create a temporary address 649 * as well (when specified). 650 */ 651 if (ip6_use_tempaddr && 652 pr->ndpr_refcnt == 1) { 653 int e; 654 if ((e = in6_tmpifadd(ia, 1)) != 0) { 655 log(LOG_NOTICE, "in6_control: " 656 "failed to create a " 657 "temporary address, " 658 "errno=%d\n", 659 e); 660 } 661 } 662 } 663 664 /* 665 * this might affect the status of autoconfigured 666 * addresses, that is, this address might make 667 * other addresses detached. 668 */ 669 pfxlist_onlink_check(); 670 } 671 break; 672 } 673 674 case SIOCDIFADDR_IN6: 675 { 676 int i = 0; 677 struct nd_prefix pr0, *pr; 678 679 /* 680 * If the address being deleted is the only one that owns 681 * the corresponding prefix, expire the prefix as well. 682 * XXX: theoretically, we don't have to worry about such 683 * relationship, since we separate the address management 684 * and the prefix management. We do this, however, to provide 685 * as much backward compatibility as possible in terms of 686 * the ioctl operation. 687 */ 688 bzero(&pr0, sizeof(pr0)); 689 pr0.ndpr_ifp = ifp; 690 pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, 691 NULL); 692 if (pr0.ndpr_plen == 128) 693 goto purgeaddr; 694 pr0.ndpr_prefix = ia->ia_addr; 695 pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr; 696 for (i = 0; i < 4; i++) { 697 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= 698 ia->ia_prefixmask.sin6_addr.s6_addr32[i]; 699 } 700 /* 701 * The logic of the following condition is a bit complicated. 702 * We expire the prefix when 703 * 1. the address obeys autoconfiguration and it is the 704 * only owner of the associated prefix, or 705 * 2. the address does not obey autoconf and there is no 706 * other owner of the prefix. 707 */ 708 if ((pr = nd6_prefix_lookup(&pr0)) != NULL && 709 (((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 && 710 pr->ndpr_refcnt == 1) || 711 ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0 && 712 pr->ndpr_refcnt == 0))) { 713 pr->ndpr_expire = 1; /* XXX: just for expiration */ 714 } 715 716 purgeaddr: 717 in6_purgeaddr(&ia->ia_ifa); 718 break; 719 } 720 721 default: 722 if (ifp == NULL || ifp->if_ioctl == 0) 723 return (EOPNOTSUPP); 724 return ((*ifp->if_ioctl)(ifp, cmd, data)); 725 } 726 727 return (0); 728} 729 730/* 731 * Update parameters of an IPv6 interface address. 732 * If necessary, a new entry is created and linked into address chains. 733 * This function is separated from in6_control(). 734 * XXX: should this be performed under splnet()? 735 */ 736int 737in6_update_ifa(ifp, ifra, ia) 738 struct ifnet *ifp; 739 struct in6_aliasreq *ifra; 740 struct in6_ifaddr *ia; 741{ 742 int error = 0, hostIsNew = 0, plen = -1; 743 struct in6_ifaddr *oia; 744 struct sockaddr_in6 dst6; 745 struct in6_addrlifetime *lt; 746 747 /* Validate parameters */ 748 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 749 return (EINVAL); 750 751 /* 752 * The destination address for a p2p link must have a family 753 * of AF_UNSPEC or AF_INET6. 754 */ 755 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 756 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 757 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 758 return (EAFNOSUPPORT); 759 /* 760 * validate ifra_prefixmask. don't check sin6_family, netmask 761 * does not carry fields other than sin6_len. 762 */ 763 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 764 return (EINVAL); 765 /* 766 * Because the IPv6 address architecture is classless, we require 767 * users to specify a (non 0) prefix length (mask) for a new address. 768 * We also require the prefix (when specified) mask is valid, and thus 769 * reject a non-consecutive mask. 770 */ 771 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 772 return (EINVAL); 773 if (ifra->ifra_prefixmask.sin6_len != 0) { 774 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 775 (u_char *)&ifra->ifra_prefixmask + 776 ifra->ifra_prefixmask.sin6_len); 777 if (plen <= 0) 778 return (EINVAL); 779 } else { 780 /* 781 * In this case, ia must not be NULL. We just use its prefix 782 * length. 783 */ 784 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 785 } 786 /* 787 * If the destination address on a p2p interface is specified, 788 * and the address is a scoped one, validate/set the scope 789 * zone identifier. 790 */ 791 dst6 = ifra->ifra_dstaddr; 792 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 793 (dst6.sin6_family == AF_INET6)) { 794 int scopeid; 795 796 if ((error = in6_recoverscope(&dst6, 797 &ifra->ifra_dstaddr.sin6_addr, ifp)) != 0) 798 return (error); 799 if (in6_addr2zoneid(ifp, &dst6.sin6_addr, &scopeid)) 800 return (EINVAL); 801 if (dst6.sin6_scope_id == 0) /* user omit to specify the ID. */ 802 dst6.sin6_scope_id = scopeid; 803 else if (dst6.sin6_scope_id != scopeid) 804 return (EINVAL); /* scope ID mismatch. */ 805 if ((error = in6_embedscope(&dst6.sin6_addr, &dst6, NULL, NULL)) 806 != 0) 807 return (error); 808 dst6.sin6_scope_id = 0; /* XXX */ 809 } 810 /* 811 * The destination address can be specified only for a p2p or a 812 * loopback interface. If specified, the corresponding prefix length 813 * must be 128. 814 */ 815 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 816 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 817 /* XXX: noisy message */ 818 log(LOG_INFO, "in6_update_ifa: a destination can be " 819 "specified for a p2p or a loopback IF only\n"); 820 return (EINVAL); 821 } 822 if (plen != 128) { 823 /* 824 * The following message seems noisy, but we dare to 825 * add it for diagnosis. 826 */ 827 log(LOG_INFO, "in6_update_ifa: prefixlen must be 128 " 828 "when dstaddr is specified\n"); 829 return (EINVAL); 830 } 831 } 832 /* lifetime consistency check */ 833 lt = &ifra->ifra_lifetime; 834 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME 835 && lt->ia6t_vltime + time_second < time_second) { 836 return EINVAL; 837 } 838 if (lt->ia6t_vltime == 0) { 839 /* 840 * the following log might be noisy, but this is a typical 841 * configuration mistake or a tool's bug. 842 */ 843 log(LOG_INFO, 844 "in6_update_ifa: valid lifetime is 0 for %s\n", 845 ip6_sprintf(&ifra->ifra_addr.sin6_addr)); 846 } 847 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME 848 && lt->ia6t_pltime + time_second < time_second) { 849 return EINVAL; 850 } 851 852 /* 853 * If this is a new address, allocate a new ifaddr and link it 854 * into chains. 855 */ 856 if (ia == NULL) { 857 hostIsNew = 1; 858 /* 859 * When in6_update_ifa() is called in a process of a received 860 * RA, it is called under an interrupt context. So, we should 861 * call malloc with M_NOWAIT. 862 */ 863 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR, 864 M_NOWAIT); 865 if (ia == NULL) 866 return (ENOBUFS); 867 bzero((caddr_t)ia, sizeof(*ia)); 868 /* Initialize the address and masks */ 869 IFA_LOCK_INIT(&ia->ia_ifa); 870 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 871 ia->ia_addr.sin6_family = AF_INET6; 872 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 873 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 874 /* 875 * XXX: some functions expect that ifa_dstaddr is not 876 * NULL for p2p interfaces. 877 */ 878 ia->ia_ifa.ifa_dstaddr = 879 (struct sockaddr *)&ia->ia_dstaddr; 880 } else { 881 ia->ia_ifa.ifa_dstaddr = NULL; 882 } 883 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 884 885 ia->ia_ifp = ifp; 886 if ((oia = in6_ifaddr) != NULL) { 887 for ( ; oia->ia_next; oia = oia->ia_next) 888 continue; 889 oia->ia_next = ia; 890 } else 891 in6_ifaddr = ia; 892 893 ia->ia_ifa.ifa_refcnt = 1; 894 TAILQ_INSERT_TAIL(&ifp->if_addrlist, &ia->ia_ifa, ifa_list); 895 } 896 897 /* set prefix mask */ 898 if (ifra->ifra_prefixmask.sin6_len) { 899 /* 900 * We prohibit changing the prefix length of an existing 901 * address, because 902 * + such an operation should be rare in IPv6, and 903 * + the operation would confuse prefix management. 904 */ 905 if (ia->ia_prefixmask.sin6_len && 906 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 907 log(LOG_INFO, "in6_update_ifa: the prefix length of an" 908 " existing (%s) address should not be changed\n", 909 ip6_sprintf(&ia->ia_addr.sin6_addr)); 910 error = EINVAL; 911 goto unlink; 912 } 913 ia->ia_prefixmask = ifra->ifra_prefixmask; 914 } 915 916 /* 917 * If a new destination address is specified, scrub the old one and 918 * install the new destination. Note that the interface must be 919 * p2p or loopback (see the check above.) 920 */ 921 if (dst6.sin6_family == AF_INET6 && 922 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 923 int e; 924 925 if ((ia->ia_flags & IFA_ROUTE) != 0 && 926 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) { 927 log(LOG_ERR, "in6_update_ifa: failed to remove " 928 "a route to the old destination: %s\n", 929 ip6_sprintf(&ia->ia_addr.sin6_addr)); 930 /* proceed anyway... */ 931 } else 932 ia->ia_flags &= ~IFA_ROUTE; 933 ia->ia_dstaddr = dst6; 934 } 935 936 /* reset the interface and routing table appropriately. */ 937 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) 938 goto unlink; 939 940 /* 941 * Beyond this point, we should call in6_purgeaddr upon an error, 942 * not just go to unlink. 943 */ 944 945 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 946 struct sockaddr_in6 mltaddr, mltmask; 947 struct in6_multi *in6m; 948 949 if (hostIsNew) { 950 /* join solicited multicast addr for new host id */ 951 struct in6_addr llsol; 952 953 bzero(&llsol, sizeof(struct in6_addr)); 954 llsol.s6_addr16[0] = htons(0xff02); 955 llsol.s6_addr16[1] = htons(ifp->if_index); 956 llsol.s6_addr32[1] = 0; 957 llsol.s6_addr32[2] = htonl(1); 958 llsol.s6_addr32[3] = 959 ifra->ifra_addr.sin6_addr.s6_addr32[3]; 960 llsol.s6_addr8[12] = 0xff; 961 (void)in6_addmulti(&llsol, ifp, &error); 962 if (error != 0) { 963 log(LOG_WARNING, 964 "in6_update_ifa: addmulti failed for " 965 "%s on %s (errno=%d)\n", 966 ip6_sprintf(&llsol), if_name(ifp), 967 error); 968 in6_purgeaddr((struct ifaddr *)ia); 969 return (error); 970 } 971 } 972 973 bzero(&mltmask, sizeof(mltmask)); 974 mltmask.sin6_len = sizeof(struct sockaddr_in6); 975 mltmask.sin6_family = AF_INET6; 976 mltmask.sin6_addr = in6mask32; 977 978 /* 979 * join link-local all-nodes address 980 */ 981 bzero(&mltaddr, sizeof(mltaddr)); 982 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 983 mltaddr.sin6_family = AF_INET6; 984 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 985 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); 986 987 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); 988 if (in6m == NULL) { 989 rtrequest(RTM_ADD, 990 (struct sockaddr *)&mltaddr, 991 (struct sockaddr *)&ia->ia_addr, 992 (struct sockaddr *)&mltmask, 993 RTF_UP|RTF_CLONING, /* xxx */ 994 (struct rtentry **)0); 995 (void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error); 996 if (error != 0) { 997 log(LOG_WARNING, 998 "in6_update_ifa: addmulti failed for " 999 "%s on %s (errno=%d)\n", 1000 ip6_sprintf(&mltaddr.sin6_addr), 1001 if_name(ifp), error); 1002 } 1003 } 1004 1005 /* 1006 * join node information group address 1007 */ 1008#define hostnamelen strlen(hostname) 1009 if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr) 1010 == 0) { 1011 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); 1012 if (in6m == NULL && ia != NULL) { 1013 (void)in6_addmulti(&mltaddr.sin6_addr, 1014 ifp, &error); 1015 if (error != 0) { 1016 log(LOG_WARNING, "in6_update_ifa: " 1017 "addmulti failed for " 1018 "%s on %s (errno=%d)\n", 1019 ip6_sprintf(&mltaddr.sin6_addr), 1020 if_name(ifp), error); 1021 } 1022 } 1023 } 1024#undef hostnamelen 1025 1026 /* 1027 * join node-local all-nodes address, on loopback. 1028 * XXX: since "node-local" is obsoleted by interface-local, 1029 * we have to join the group on every interface with 1030 * some interface-boundary restriction. 1031 */ 1032 if (ifp->if_flags & IFF_LOOPBACK) { 1033 struct in6_ifaddr *ia_loop; 1034 1035 struct in6_addr loop6 = in6addr_loopback; 1036 ia_loop = in6ifa_ifpwithaddr(ifp, &loop6); 1037 1038 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1039 1040 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); 1041 if (in6m == NULL && ia_loop != NULL) { 1042 rtrequest(RTM_ADD, 1043 (struct sockaddr *)&mltaddr, 1044 (struct sockaddr *)&ia_loop->ia_addr, 1045 (struct sockaddr *)&mltmask, 1046 RTF_UP, 1047 (struct rtentry **)0); 1048 (void)in6_addmulti(&mltaddr.sin6_addr, ifp, 1049 &error); 1050 if (error != 0) { 1051 log(LOG_WARNING, "in6_update_ifa: " 1052 "addmulti failed for %s on %s " 1053 "(errno=%d)\n", 1054 ip6_sprintf(&mltaddr.sin6_addr), 1055 if_name(ifp), error); 1056 } 1057 } 1058 } 1059 } 1060 1061 ia->ia6_flags = ifra->ifra_flags; 1062 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/ 1063 ia->ia6_flags &= ~IN6_IFF_NODAD; /* Mobile IPv6 */ 1064 1065 ia->ia6_lifetime = ifra->ifra_lifetime; 1066 /* for sanity */ 1067 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1068 ia->ia6_lifetime.ia6t_expire = 1069 time_second + ia->ia6_lifetime.ia6t_vltime; 1070 } else 1071 ia->ia6_lifetime.ia6t_expire = 0; 1072 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1073 ia->ia6_lifetime.ia6t_preferred = 1074 time_second + ia->ia6_lifetime.ia6t_pltime; 1075 } else 1076 ia->ia6_lifetime.ia6t_preferred = 0; 1077 1078 /* 1079 * Perform DAD, if needed. 1080 * XXX It may be of use, if we can administratively 1081 * disable DAD. 1082 */ 1083 if (in6if_do_dad(ifp) && (ifra->ifra_flags & IN6_IFF_NODAD) == 0) { 1084 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1085 nd6_dad_start((struct ifaddr *)ia, NULL); 1086 } 1087 1088 return (error); 1089 1090 unlink: 1091 /* 1092 * XXX: if a change of an existing address failed, keep the entry 1093 * anyway. 1094 */ 1095 if (hostIsNew) 1096 in6_unlink_ifa(ia, ifp); 1097 return (error); 1098} 1099 1100void 1101in6_purgeaddr(ifa) 1102 struct ifaddr *ifa; 1103{ 1104 struct ifnet *ifp = ifa->ifa_ifp; 1105 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1106 1107 /* stop DAD processing */ 1108 nd6_dad_stop(ifa); 1109 1110 /* 1111 * delete route to the destination of the address being purged. 1112 * The interface must be p2p or loopback in this case. 1113 */ 1114 if ((ia->ia_flags & IFA_ROUTE) != 0 && ia->ia_dstaddr.sin6_len != 0) { 1115 int e; 1116 1117 if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) 1118 != 0) { 1119 log(LOG_ERR, "in6_purgeaddr: failed to remove " 1120 "a route to the p2p destination: %s on %s, " 1121 "errno=%d\n", 1122 ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp), 1123 e); 1124 /* proceed anyway... */ 1125 } else 1126 ia->ia_flags &= ~IFA_ROUTE; 1127 } 1128 1129 /* Remove ownaddr's loopback rtentry, if it exists. */ 1130 in6_ifremloop(&(ia->ia_ifa)); 1131 1132 if (ifp->if_flags & IFF_MULTICAST) { 1133 /* 1134 * delete solicited multicast addr for deleting host id 1135 */ 1136 struct in6_multi *in6m; 1137 struct in6_addr llsol; 1138 bzero(&llsol, sizeof(struct in6_addr)); 1139 llsol.s6_addr16[0] = htons(0xff02); 1140 llsol.s6_addr16[1] = htons(ifp->if_index); 1141 llsol.s6_addr32[1] = 0; 1142 llsol.s6_addr32[2] = htonl(1); 1143 llsol.s6_addr32[3] = 1144 ia->ia_addr.sin6_addr.s6_addr32[3]; 1145 llsol.s6_addr8[12] = 0xff; 1146 1147 IN6_LOOKUP_MULTI(llsol, ifp, in6m); 1148 if (in6m) 1149 in6_delmulti(in6m); 1150 } 1151 1152 in6_unlink_ifa(ia, ifp); 1153} 1154 1155static void 1156in6_unlink_ifa(ia, ifp) 1157 struct in6_ifaddr *ia; 1158 struct ifnet *ifp; 1159{ 1160 int plen, iilen; 1161 struct in6_ifaddr *oia; 1162 int s = splnet(); 1163 1164 TAILQ_REMOVE(&ifp->if_addrlist, &ia->ia_ifa, ifa_list); 1165 1166 oia = ia; 1167 if (oia == (ia = in6_ifaddr)) 1168 in6_ifaddr = ia->ia_next; 1169 else { 1170 while (ia->ia_next && (ia->ia_next != oia)) 1171 ia = ia->ia_next; 1172 if (ia->ia_next) 1173 ia->ia_next = oia->ia_next; 1174 else { 1175 /* search failed */ 1176 printf("Couldn't unlink in6_ifaddr from in6_ifaddr\n"); 1177 } 1178 } 1179 1180 if (oia->ia6_ifpr) { /* check for safety */ 1181 plen = in6_mask2len(&oia->ia_prefixmask.sin6_addr, NULL); 1182 iilen = (sizeof(oia->ia_prefixmask.sin6_addr) << 3) - plen; 1183 in6_prefix_remove_ifid(iilen, oia); 1184 } 1185 1186 /* 1187 * When an autoconfigured address is being removed, release the 1188 * reference to the base prefix. Also, since the release might 1189 * affect the status of other (detached) addresses, call 1190 * pfxlist_onlink_check(). 1191 */ 1192 if ((oia->ia6_flags & IN6_IFF_AUTOCONF) != 0) { 1193 if (oia->ia6_ndpr == NULL) { 1194 log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address " 1195 "%p has no prefix\n", oia); 1196 } else { 1197 oia->ia6_ndpr->ndpr_refcnt--; 1198 oia->ia6_flags &= ~IN6_IFF_AUTOCONF; 1199 oia->ia6_ndpr = NULL; 1200 } 1201 1202 pfxlist_onlink_check(); 1203 } 1204 1205 /* 1206 * release another refcnt for the link from in6_ifaddr. 1207 * Note that we should decrement the refcnt at least once for all *BSD. 1208 */ 1209 IFAFREE(&oia->ia_ifa); 1210 1211 splx(s); 1212} 1213 1214void 1215in6_purgeif(ifp) 1216 struct ifnet *ifp; 1217{ 1218 struct ifaddr *ifa, *nifa; 1219 1220 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; ifa = nifa) { 1221 nifa = TAILQ_NEXT(ifa, ifa_list); 1222 if (ifa->ifa_addr->sa_family != AF_INET6) 1223 continue; 1224 in6_purgeaddr(ifa); 1225 } 1226 1227 in6_ifdetach(ifp); 1228} 1229 1230/* 1231 * SIOC[GAD]LIFADDR. 1232 * SIOCGLIFADDR: get first address. (?) 1233 * SIOCGLIFADDR with IFLR_PREFIX: 1234 * get first address that matches the specified prefix. 1235 * SIOCALIFADDR: add the specified address. 1236 * SIOCALIFADDR with IFLR_PREFIX: 1237 * add the specified prefix, filling hostid part from 1238 * the first link-local address. prefixlen must be <= 64. 1239 * SIOCDLIFADDR: delete the specified address. 1240 * SIOCDLIFADDR with IFLR_PREFIX: 1241 * delete the first address that matches the specified prefix. 1242 * return values: 1243 * EINVAL on invalid parameters 1244 * EADDRNOTAVAIL on prefix match failed/specified address not found 1245 * other values may be returned from in6_ioctl() 1246 * 1247 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64. 1248 * this is to accomodate address naming scheme other than RFC2374, 1249 * in the future. 1250 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 1251 * address encoding scheme. (see figure on page 8) 1252 */ 1253static int 1254in6_lifaddr_ioctl(so, cmd, data, ifp, td) 1255 struct socket *so; 1256 u_long cmd; 1257 caddr_t data; 1258 struct ifnet *ifp; 1259 struct thread *td; 1260{ 1261 struct if_laddrreq *iflr = (struct if_laddrreq *)data; 1262 struct ifaddr *ifa; 1263 struct sockaddr *sa; 1264 1265 /* sanity checks */ 1266 if (!data || !ifp) { 1267 panic("invalid argument to in6_lifaddr_ioctl"); 1268 /* NOTREACHED */ 1269 } 1270 1271 switch (cmd) { 1272 case SIOCGLIFADDR: 1273 /* address must be specified on GET with IFLR_PREFIX */ 1274 if ((iflr->flags & IFLR_PREFIX) == 0) 1275 break; 1276 /* FALLTHROUGH */ 1277 case SIOCALIFADDR: 1278 case SIOCDLIFADDR: 1279 /* address must be specified on ADD and DELETE */ 1280 sa = (struct sockaddr *)&iflr->addr; 1281 if (sa->sa_family != AF_INET6) 1282 return EINVAL; 1283 if (sa->sa_len != sizeof(struct sockaddr_in6)) 1284 return EINVAL; 1285 /* XXX need improvement */ 1286 sa = (struct sockaddr *)&iflr->dstaddr; 1287 if (sa->sa_family && sa->sa_family != AF_INET6) 1288 return EINVAL; 1289 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6)) 1290 return EINVAL; 1291 break; 1292 default: /* shouldn't happen */ 1293#if 0 1294 panic("invalid cmd to in6_lifaddr_ioctl"); 1295 /* NOTREACHED */ 1296#else 1297 return EOPNOTSUPP; 1298#endif 1299 } 1300 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) 1301 return EINVAL; 1302 1303 switch (cmd) { 1304 case SIOCALIFADDR: 1305 { 1306 struct in6_aliasreq ifra; 1307 struct in6_addr *hostid = NULL; 1308 int prefixlen; 1309 1310 if ((iflr->flags & IFLR_PREFIX) != 0) { 1311 struct sockaddr_in6 *sin6; 1312 1313 /* 1314 * hostid is to fill in the hostid part of the 1315 * address. hostid points to the first link-local 1316 * address attached to the interface. 1317 */ 1318 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0); 1319 if (!ifa) 1320 return EADDRNOTAVAIL; 1321 hostid = IFA_IN6(ifa); 1322 1323 /* prefixlen must be <= 64. */ 1324 if (64 < iflr->prefixlen) 1325 return EINVAL; 1326 prefixlen = iflr->prefixlen; 1327 1328 /* hostid part must be zero. */ 1329 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1330 if (sin6->sin6_addr.s6_addr32[2] != 0 1331 || sin6->sin6_addr.s6_addr32[3] != 0) { 1332 return EINVAL; 1333 } 1334 } else 1335 prefixlen = iflr->prefixlen; 1336 1337 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 1338 bzero(&ifra, sizeof(ifra)); 1339 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name)); 1340 1341 bcopy(&iflr->addr, &ifra.ifra_addr, 1342 ((struct sockaddr *)&iflr->addr)->sa_len); 1343 if (hostid) { 1344 /* fill in hostid part */ 1345 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 1346 hostid->s6_addr32[2]; 1347 ifra.ifra_addr.sin6_addr.s6_addr32[3] = 1348 hostid->s6_addr32[3]; 1349 } 1350 1351 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */ 1352 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 1353 ((struct sockaddr *)&iflr->dstaddr)->sa_len); 1354 if (hostid) { 1355 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = 1356 hostid->s6_addr32[2]; 1357 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = 1358 hostid->s6_addr32[3]; 1359 } 1360 } 1361 1362 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 1363 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); 1364 1365 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; 1366 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td); 1367 } 1368 case SIOCGLIFADDR: 1369 case SIOCDLIFADDR: 1370 { 1371 struct in6_ifaddr *ia; 1372 struct in6_addr mask, candidate, match; 1373 struct sockaddr_in6 *sin6; 1374 int cmp; 1375 1376 bzero(&mask, sizeof(mask)); 1377 if (iflr->flags & IFLR_PREFIX) { 1378 /* lookup a prefix rather than address. */ 1379 in6_prefixlen2mask(&mask, iflr->prefixlen); 1380 1381 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1382 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1383 match.s6_addr32[0] &= mask.s6_addr32[0]; 1384 match.s6_addr32[1] &= mask.s6_addr32[1]; 1385 match.s6_addr32[2] &= mask.s6_addr32[2]; 1386 match.s6_addr32[3] &= mask.s6_addr32[3]; 1387 1388 /* if you set extra bits, that's wrong */ 1389 if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) 1390 return EINVAL; 1391 1392 cmp = 1; 1393 } else { 1394 if (cmd == SIOCGLIFADDR) { 1395 /* on getting an address, take the 1st match */ 1396 cmp = 0; /* XXX */ 1397 } else { 1398 /* on deleting an address, do exact match */ 1399 in6_prefixlen2mask(&mask, 128); 1400 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1401 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1402 1403 cmp = 1; 1404 } 1405 } 1406 1407 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1408 if (ifa->ifa_addr->sa_family != AF_INET6) 1409 continue; 1410 if (!cmp) 1411 break; 1412 1413 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); 1414 /* 1415 * XXX: this is adhoc, but is necessary to allow 1416 * a user to specify fe80::/64 (not /10) for a 1417 * link-local address. 1418 */ 1419 if (IN6_IS_ADDR_LINKLOCAL(&candidate)) 1420 candidate.s6_addr16[1] = 0; 1421 candidate.s6_addr32[0] &= mask.s6_addr32[0]; 1422 candidate.s6_addr32[1] &= mask.s6_addr32[1]; 1423 candidate.s6_addr32[2] &= mask.s6_addr32[2]; 1424 candidate.s6_addr32[3] &= mask.s6_addr32[3]; 1425 if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) 1426 break; 1427 } 1428 if (!ifa) 1429 return EADDRNOTAVAIL; 1430 ia = ifa2ia6(ifa); 1431 1432 if (cmd == SIOCGLIFADDR) { 1433 struct sockaddr_in6 *s6; 1434 1435 /* fill in the if_laddrreq structure */ 1436 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); 1437 s6 = (struct sockaddr_in6 *)&iflr->addr; 1438 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) { 1439 s6->sin6_addr.s6_addr16[1] = 0; 1440 if (in6_addr2zoneid(ifp, &s6->sin6_addr, 1441 &s6->sin6_scope_id)) 1442 return (EINVAL);/* XXX */ 1443 } 1444 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 1445 bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 1446 ia->ia_dstaddr.sin6_len); 1447 s6 = (struct sockaddr_in6 *)&iflr->dstaddr; 1448 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) { 1449 s6->sin6_addr.s6_addr16[1] = 0; 1450 if (in6_addr2zoneid(ifp, 1451 &s6->sin6_addr, &s6->sin6_scope_id)) 1452 return (EINVAL); /* EINVAL */ 1453 } 1454 } else 1455 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 1456 1457 iflr->prefixlen = 1458 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 1459 1460 iflr->flags = ia->ia6_flags; /* XXX */ 1461 1462 return 0; 1463 } else { 1464 struct in6_aliasreq ifra; 1465 1466 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 1467 bzero(&ifra, sizeof(ifra)); 1468 bcopy(iflr->iflr_name, ifra.ifra_name, 1469 sizeof(ifra.ifra_name)); 1470 1471 bcopy(&ia->ia_addr, &ifra.ifra_addr, 1472 ia->ia_addr.sin6_len); 1473 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 1474 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 1475 ia->ia_dstaddr.sin6_len); 1476 } else { 1477 bzero(&ifra.ifra_dstaddr, 1478 sizeof(ifra.ifra_dstaddr)); 1479 } 1480 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, 1481 ia->ia_prefixmask.sin6_len); 1482 1483 ifra.ifra_flags = ia->ia6_flags; 1484 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, 1485 ifp, td); 1486 } 1487 } 1488 } 1489 1490 return EOPNOTSUPP; /* just for safety */ 1491} 1492 1493/* 1494 * Initialize an interface's intetnet6 address 1495 * and routing table entry. 1496 */ 1497static int 1498in6_ifinit(ifp, ia, sin6, newhost) 1499 struct ifnet *ifp; 1500 struct in6_ifaddr *ia; 1501 struct sockaddr_in6 *sin6; 1502 int newhost; 1503{ 1504 int error = 0, plen, ifacount = 0; 1505 int s = splimp(); 1506 struct ifaddr *ifa; 1507 1508 /* 1509 * Give the interface a chance to initialize 1510 * if this is its first address, 1511 * and to validate the address if necessary. 1512 */ 1513 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1514 if (ifa->ifa_addr == NULL) 1515 continue; /* just for safety */ 1516 if (ifa->ifa_addr->sa_family != AF_INET6) 1517 continue; 1518 ifacount++; 1519 } 1520 1521 ia->ia_addr = *sin6; 1522 1523 if (ifacount <= 1 && ifp->if_ioctl && 1524 (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia))) { 1525 splx(s); 1526 return (error); 1527 } 1528 splx(s); 1529 1530 ia->ia_ifa.ifa_metric = ifp->if_metric; 1531 1532 /* we could do in(6)_socktrim here, but just omit it at this moment. */ 1533 1534 /* 1535 * Special case: 1536 * If the destination address is specified for a point-to-point 1537 * interface, install a route to the destination as an interface 1538 * direct route. 1539 */ 1540 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1541 if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) { 1542 if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD, 1543 RTF_UP | RTF_HOST)) != 0) 1544 return (error); 1545 ia->ia_flags |= IFA_ROUTE; 1546 } 1547 if (plen < 128) { 1548 /* 1549 * The RTF_CLONING flag is necessary for in6_is_ifloop_auto(). 1550 */ 1551 ia->ia_ifa.ifa_flags |= RTF_CLONING; 1552 } 1553 1554 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ 1555 if (newhost) { 1556 /* set the rtrequest function to create llinfo */ 1557 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; 1558 in6_ifaddloop(&(ia->ia_ifa)); 1559 } 1560 1561 return (error); 1562} 1563 1564/* 1565 * Add an address to the list of IP6 multicast addresses for a 1566 * given interface. 1567 */ 1568struct in6_multi * 1569in6_addmulti(maddr6, ifp, errorp) 1570 struct in6_addr *maddr6; 1571 struct ifnet *ifp; 1572 int *errorp; 1573{ 1574 struct in6_multi *in6m; 1575 struct sockaddr_in6 sin6; 1576 struct ifmultiaddr *ifma; 1577 int s = splnet(); 1578 1579 *errorp = 0; 1580 1581 /* 1582 * Call generic routine to add membership or increment 1583 * refcount. It wants addresses in the form of a sockaddr, 1584 * so we build one here (being careful to zero the unused bytes). 1585 */ 1586 bzero(&sin6, sizeof sin6); 1587 sin6.sin6_family = AF_INET6; 1588 sin6.sin6_len = sizeof sin6; 1589 sin6.sin6_addr = *maddr6; 1590 *errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma); 1591 if (*errorp) { 1592 splx(s); 1593 return 0; 1594 } 1595 1596 /* 1597 * If ifma->ifma_protospec is null, then if_addmulti() created 1598 * a new record. Otherwise, we are done. 1599 */ 1600 if (ifma->ifma_protospec != 0) 1601 return ifma->ifma_protospec; 1602 1603 /* XXX - if_addmulti uses M_WAITOK. Can this really be called 1604 at interrupt time? If so, need to fix if_addmulti. XXX */ 1605 in6m = (struct in6_multi *)malloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT); 1606 if (in6m == NULL) { 1607 splx(s); 1608 return (NULL); 1609 } 1610 1611 bzero(in6m, sizeof *in6m); 1612 in6m->in6m_addr = *maddr6; 1613 in6m->in6m_ifp = ifp; 1614 in6m->in6m_ifma = ifma; 1615 ifma->ifma_protospec = in6m; 1616 LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry); 1617 1618 /* 1619 * Let MLD6 know that we have joined a new IPv6 multicast 1620 * group. 1621 */ 1622 mld6_start_listening(in6m); 1623 splx(s); 1624 return (in6m); 1625} 1626 1627/* 1628 * Delete a multicast address record. 1629 */ 1630void 1631in6_delmulti(in6m) 1632 struct in6_multi *in6m; 1633{ 1634 struct ifmultiaddr *ifma = in6m->in6m_ifma; 1635 int s = splnet(); 1636 1637 if (ifma->ifma_refcount == 1) { 1638 /* 1639 * No remaining claims to this record; let MLD6 know 1640 * that we are leaving the multicast group. 1641 */ 1642 mld6_stop_listening(in6m); 1643 ifma->ifma_protospec = 0; 1644 LIST_REMOVE(in6m, in6m_entry); 1645 free(in6m, M_IPMADDR); 1646 } 1647 /* XXX - should be separate API for when we have an ifma? */ 1648 if_delmulti(ifma->ifma_ifp, ifma->ifma_addr); 1649 splx(s); 1650} 1651 1652/* 1653 * Find an IPv6 interface link-local address specific to an interface. 1654 */ 1655struct in6_ifaddr * 1656in6ifa_ifpforlinklocal(ifp, ignoreflags) 1657 struct ifnet *ifp; 1658 int ignoreflags; 1659{ 1660 struct ifaddr *ifa; 1661 1662 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1663 if (ifa->ifa_addr == NULL) 1664 continue; /* just for safety */ 1665 if (ifa->ifa_addr->sa_family != AF_INET6) 1666 continue; 1667 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1668 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1669 ignoreflags) != 0) 1670 continue; 1671 break; 1672 } 1673 } 1674 1675 return ((struct in6_ifaddr *)ifa); 1676} 1677 1678 1679/* 1680 * find the internet address corresponding to a given interface and address. 1681 */ 1682struct in6_ifaddr * 1683in6ifa_ifpwithaddr(ifp, addr) 1684 struct ifnet *ifp; 1685 struct in6_addr *addr; 1686{ 1687 struct ifaddr *ifa; 1688 1689 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1690 if (ifa->ifa_addr == NULL) 1691 continue; /* just for safety */ 1692 if (ifa->ifa_addr->sa_family != AF_INET6) 1693 continue; 1694 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) 1695 break; 1696 } 1697 1698 return ((struct in6_ifaddr *)ifa); 1699} 1700 1701/* 1702 * Convert IP6 address to printable (loggable) representation. 1703 */ 1704static char digits[] = "0123456789abcdef"; 1705static int ip6round = 0; 1706char * 1707ip6_sprintf(addr) 1708 const struct in6_addr *addr; 1709{ 1710 static char ip6buf[8][48]; 1711 int i; 1712 char *cp; 1713 const u_short *a = (const u_short *)addr; 1714 const u_char *d; 1715 int dcolon = 0; 1716 1717 ip6round = (ip6round + 1) & 7; 1718 cp = ip6buf[ip6round]; 1719 1720 for (i = 0; i < 8; i++) { 1721 if (dcolon == 1) { 1722 if (*a == 0) { 1723 if (i == 7) 1724 *cp++ = ':'; 1725 a++; 1726 continue; 1727 } else 1728 dcolon = 2; 1729 } 1730 if (*a == 0) { 1731 if (dcolon == 0 && *(a + 1) == 0) { 1732 if (i == 0) 1733 *cp++ = ':'; 1734 *cp++ = ':'; 1735 dcolon = 1; 1736 } else { 1737 *cp++ = '0'; 1738 *cp++ = ':'; 1739 } 1740 a++; 1741 continue; 1742 } 1743 d = (const u_char *)a; 1744 *cp++ = digits[*d >> 4]; 1745 *cp++ = digits[*d++ & 0xf]; 1746 *cp++ = digits[*d >> 4]; 1747 *cp++ = digits[*d & 0xf]; 1748 *cp++ = ':'; 1749 a++; 1750 } 1751 *--cp = 0; 1752 return (ip6buf[ip6round]); 1753} 1754 1755int 1756in6_localaddr(in6) 1757 struct in6_addr *in6; 1758{ 1759 struct in6_ifaddr *ia; 1760 1761 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1762 return 1; 1763 1764 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 1765 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1766 &ia->ia_prefixmask.sin6_addr)) { 1767 return 1; 1768 } 1769 } 1770 1771 return (0); 1772} 1773 1774int 1775in6_is_addr_deprecated(sa6) 1776 struct sockaddr_in6 *sa6; 1777{ 1778 struct in6_ifaddr *ia; 1779 1780 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 1781 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, 1782 &sa6->sin6_addr) && 1783 (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) 1784 return (1); /* true */ 1785 1786 /* XXX: do we still have to go thru the rest of the list? */ 1787 } 1788 1789 return (0); /* false */ 1790} 1791 1792/* 1793 * return length of part which dst and src are equal 1794 * hard coding... 1795 */ 1796int 1797in6_matchlen(src, dst) 1798struct in6_addr *src, *dst; 1799{ 1800 int match = 0; 1801 u_char *s = (u_char *)src, *d = (u_char *)dst; 1802 u_char *lim = s + 16, r; 1803 1804 while (s < lim) 1805 if ((r = (*d++ ^ *s++)) != 0) { 1806 while (r < 128) { 1807 match++; 1808 r <<= 1; 1809 } 1810 break; 1811 } else 1812 match += 8; 1813 return match; 1814} 1815 1816/* XXX: to be scope conscious */ 1817int 1818in6_are_prefix_equal(p1, p2, len) 1819 struct in6_addr *p1, *p2; 1820 int len; 1821{ 1822 int bytelen, bitlen; 1823 1824 /* sanity check */ 1825 if (0 > len || len > 128) { 1826 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1827 len); 1828 return (0); 1829 } 1830 1831 bytelen = len / 8; 1832 bitlen = len % 8; 1833 1834 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1835 return (0); 1836 if (p1->s6_addr[bytelen] >> (8 - bitlen) != 1837 p2->s6_addr[bytelen] >> (8 - bitlen)) 1838 return (0); 1839 1840 return (1); 1841} 1842 1843void 1844in6_prefixlen2mask(maskp, len) 1845 struct in6_addr *maskp; 1846 int len; 1847{ 1848 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1849 int bytelen, bitlen, i; 1850 1851 /* sanity check */ 1852 if (0 > len || len > 128) { 1853 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1854 len); 1855 return; 1856 } 1857 1858 bzero(maskp, sizeof(*maskp)); 1859 bytelen = len / 8; 1860 bitlen = len % 8; 1861 for (i = 0; i < bytelen; i++) 1862 maskp->s6_addr[i] = 0xff; 1863 if (bitlen) 1864 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1865} 1866 1867/* 1868 * return the best address out of the same scope 1869 */ 1870struct in6_ifaddr * 1871in6_ifawithscope(oifp, dst) 1872 struct ifnet *oifp; 1873 struct in6_addr *dst; 1874{ 1875 int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0; 1876 int blen = -1; 1877 struct ifaddr *ifa; 1878 struct ifnet *ifp; 1879 struct in6_ifaddr *ifa_best = NULL; 1880 u_int32_t dstzone, odstzone; 1881 1882 if (oifp == NULL) { 1883 return (NULL); 1884 } 1885 1886 if (in6_addr2zoneid(oifp, dst, &odstzone)) 1887 return (NULL); 1888 1889 /* 1890 * We search for all addresses on all interfaces from the beginning. 1891 * Comparing an interface with the outgoing interface will be done 1892 * only at the final stage of tiebreaking. 1893 */ 1894 IFNET_RLOCK(); 1895 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) 1896 { 1897 /* 1898 * We can never take an address that breaks the scope zone 1899 * of the destination. 1900 */ 1901 if (in6_addr2zoneid(ifp, dst, &dstzone) || dstzone != odstzone) 1902 continue; 1903 1904 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 1905 { 1906 int tlen = -1, dscopecmp, bscopecmp, matchcmp; 1907 1908 if (ifa->ifa_addr->sa_family != AF_INET6) 1909 continue; 1910 1911 src_scope = in6_addrscope(IFA_IN6(ifa)); 1912 1913 /* 1914 * Don't use an address before completing DAD 1915 * nor a duplicated address. 1916 */ 1917 if (((struct in6_ifaddr *)ifa)->ia6_flags & 1918 IN6_IFF_NOTREADY) 1919 continue; 1920 1921 /* XXX: is there any case to allow anycasts? */ 1922 if (((struct in6_ifaddr *)ifa)->ia6_flags & 1923 IN6_IFF_ANYCAST) 1924 continue; 1925 1926 if (((struct in6_ifaddr *)ifa)->ia6_flags & 1927 IN6_IFF_DETACHED) 1928 continue; 1929 1930 /* 1931 * If this is the first address we find, 1932 * keep it anyway. 1933 */ 1934 if (ifa_best == NULL) 1935 goto replace; 1936 1937 /* 1938 * ifa_best is never NULL beyond this line except 1939 * within the block labeled "replace". 1940 */ 1941 1942 /* 1943 * If ifa_best has a smaller scope than dst and 1944 * the current address has a larger one than 1945 * (or equal to) dst, always replace ifa_best. 1946 * Also, if the current address has a smaller scope 1947 * than dst, ignore it unless ifa_best also has a 1948 * smaller scope. 1949 * Consequently, after the two if-clause below, 1950 * the followings must be satisfied: 1951 * (scope(src) < scope(dst) && 1952 * scope(best) < scope(dst)) 1953 * OR 1954 * (scope(best) >= scope(dst) && 1955 * scope(src) >= scope(dst)) 1956 */ 1957 if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 && 1958 IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0) 1959 goto replace; /* (A) */ 1960 if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 && 1961 IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0) 1962 continue; /* (B) */ 1963 1964 /* 1965 * A deprecated address SHOULD NOT be used in new 1966 * communications if an alternate (non-deprecated) 1967 * address is available and has sufficient scope. 1968 * RFC 2462, Section 5.5.4. 1969 */ 1970 if (((struct in6_ifaddr *)ifa)->ia6_flags & 1971 IN6_IFF_DEPRECATED) { 1972 /* 1973 * Ignore any deprecated addresses if 1974 * specified by configuration. 1975 */ 1976 if (!ip6_use_deprecated) 1977 continue; 1978 1979 /* 1980 * If we have already found a non-deprecated 1981 * candidate, just ignore deprecated addresses. 1982 */ 1983 if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) 1984 == 0) 1985 continue; 1986 } 1987 1988 /* 1989 * A non-deprecated address is always preferred 1990 * to a deprecated one regardless of scopes and 1991 * address matching (Note invariants ensured by the 1992 * conditions (A) and (B) above.) 1993 */ 1994 if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) && 1995 (((struct in6_ifaddr *)ifa)->ia6_flags & 1996 IN6_IFF_DEPRECATED) == 0) 1997 goto replace; 1998 1999 /* 2000 * When we use temporary addresses described in 2001 * RFC 3041, we prefer temporary addresses to 2002 * public autoconf addresses. Again, note the 2003 * invariants from (A) and (B). Also note that we 2004 * don't have any preference between static addresses 2005 * and autoconf addresses (despite of whether or not 2006 * the latter is temporary or public.) 2007 */ 2008 if (ip6_use_tempaddr) { 2009 struct in6_ifaddr *ifat; 2010 2011 ifat = (struct in6_ifaddr *)ifa; 2012 if ((ifa_best->ia6_flags & 2013 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) 2014 == IN6_IFF_AUTOCONF && 2015 (ifat->ia6_flags & 2016 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) 2017 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) { 2018 goto replace; 2019 } 2020 if ((ifa_best->ia6_flags & 2021 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) 2022 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY) && 2023 (ifat->ia6_flags & 2024 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) 2025 == IN6_IFF_AUTOCONF) { 2026 continue; 2027 } 2028 } 2029 2030 /* 2031 * At this point, we have two cases: 2032 * 1. we are looking at a non-deprecated address, 2033 * and ifa_best is also non-deprecated. 2034 * 2. we are looking at a deprecated address, 2035 * and ifa_best is also deprecated. 2036 * Also, we do not have to consider a case where 2037 * the scope of if_best is larger(smaller) than dst and 2038 * the scope of the current address is smaller(larger) 2039 * than dst. Such a case has already been covered. 2040 * Tiebreaking is done according to the following 2041 * items: 2042 * - the scope comparison between the address and 2043 * dst (dscopecmp) 2044 * - the scope comparison between the address and 2045 * ifa_best (bscopecmp) 2046 * - if the address match dst longer than ifa_best 2047 * (matchcmp) 2048 * - if the address is on the outgoing I/F (outI/F) 2049 * 2050 * Roughly speaking, the selection policy is 2051 * - the most important item is scope. The same scope 2052 * is best. Then search for a larger scope. 2053 * Smaller scopes are the last resort. 2054 * - A deprecated address is chosen only when we have 2055 * no address that has an enough scope, but is 2056 * prefered to any addresses of smaller scopes 2057 * (this must be already done above.) 2058 * - addresses on the outgoing I/F are preferred to 2059 * ones on other interfaces if none of above 2060 * tiebreaks. In the table below, the column "bI" 2061 * means if the best_ifa is on the outgoing 2062 * interface, and the column "sI" means if the ifa 2063 * is on the outgoing interface. 2064 * - If there is no other reasons to choose one, 2065 * longest address match against dst is considered. 2066 * 2067 * The precise decision table is as follows: 2068 * dscopecmp bscopecmp match bI oI | replace? 2069 * N/A equal N/A Y N | No (1) 2070 * N/A equal N/A N Y | Yes (2) 2071 * N/A equal larger N/A | Yes (3) 2072 * N/A equal !larger N/A | No (4) 2073 * larger larger N/A N/A | No (5) 2074 * larger smaller N/A N/A | Yes (6) 2075 * smaller larger N/A N/A | Yes (7) 2076 * smaller smaller N/A N/A | No (8) 2077 * equal smaller N/A N/A | Yes (9) 2078 * equal larger (already done at A above) 2079 */ 2080 dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope); 2081 bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope); 2082 2083 if (bscopecmp == 0) { 2084 struct ifnet *bifp = ifa_best->ia_ifp; 2085 2086 if (bifp == oifp && ifp != oifp) /* (1) */ 2087 continue; 2088 if (bifp != oifp && ifp == oifp) /* (2) */ 2089 goto replace; 2090 2091 /* 2092 * Both bifp and ifp are on the outgoing 2093 * interface, or both two are on a different 2094 * interface from the outgoing I/F. 2095 * now we need address matching against dst 2096 * for tiebreaking. 2097 */ 2098 tlen = in6_matchlen(IFA_IN6(ifa), dst); 2099 matchcmp = tlen - blen; 2100 if (matchcmp > 0) /* (3) */ 2101 goto replace; 2102 continue; /* (4) */ 2103 } 2104 if (dscopecmp > 0) { 2105 if (bscopecmp > 0) /* (5) */ 2106 continue; 2107 goto replace; /* (6) */ 2108 } 2109 if (dscopecmp < 0) { 2110 if (bscopecmp > 0) /* (7) */ 2111 goto replace; 2112 continue; /* (8) */ 2113 } 2114 2115 /* now dscopecmp must be 0 */ 2116 if (bscopecmp < 0) 2117 goto replace; /* (9) */ 2118 2119 replace: 2120 ifa_best = (struct in6_ifaddr *)ifa; 2121 blen = tlen >= 0 ? tlen : 2122 in6_matchlen(IFA_IN6(ifa), dst); 2123 best_scope = in6_addrscope(&ifa_best->ia_addr.sin6_addr); 2124 } 2125 } 2126 IFNET_RUNLOCK(); 2127 2128 /* count statistics for future improvements */ 2129 if (ifa_best == NULL) 2130 ip6stat.ip6s_sources_none++; 2131 else { 2132 if (oifp == ifa_best->ia_ifp) 2133 ip6stat.ip6s_sources_sameif[best_scope]++; 2134 else 2135 ip6stat.ip6s_sources_otherif[best_scope]++; 2136 2137 if (best_scope == dst_scope) 2138 ip6stat.ip6s_sources_samescope[best_scope]++; 2139 else 2140 ip6stat.ip6s_sources_otherscope[best_scope]++; 2141 2142 if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) != 0) 2143 ip6stat.ip6s_sources_deprecated[best_scope]++; 2144 } 2145 2146 return (ifa_best); 2147} 2148 2149/* 2150 * return the best address out of the same scope. if no address was 2151 * found, return the first valid address from designated IF. 2152 */ 2153struct in6_ifaddr * 2154in6_ifawithifp(ifp, dst) 2155 struct ifnet *ifp; 2156 struct in6_addr *dst; 2157{ 2158 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 2159 struct ifaddr *ifa; 2160 struct in6_ifaddr *besta = 0; 2161 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 2162 2163 dep[0] = dep[1] = NULL; 2164 2165 /* 2166 * We first look for addresses in the same scope. 2167 * If there is one, return it. 2168 * If two or more, return one which matches the dst longest. 2169 * If none, return one of global addresses assigned other ifs. 2170 */ 2171 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 2172 if (ifa->ifa_addr->sa_family != AF_INET6) 2173 continue; 2174 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2175 continue; /* XXX: is there any case to allow anycast? */ 2176 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2177 continue; /* don't use this interface */ 2178 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2179 continue; 2180 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2181 if (ip6_use_deprecated) 2182 dep[0] = (struct in6_ifaddr *)ifa; 2183 continue; 2184 } 2185 2186 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 2187 /* 2188 * call in6_matchlen() as few as possible 2189 */ 2190 if (besta) { 2191 if (blen == -1) 2192 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 2193 tlen = in6_matchlen(IFA_IN6(ifa), dst); 2194 if (tlen > blen) { 2195 blen = tlen; 2196 besta = (struct in6_ifaddr *)ifa; 2197 } 2198 } else 2199 besta = (struct in6_ifaddr *)ifa; 2200 } 2201 } 2202 if (besta) 2203 return (besta); 2204 2205 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 2206 if (ifa->ifa_addr->sa_family != AF_INET6) 2207 continue; 2208 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2209 continue; /* XXX: is there any case to allow anycast? */ 2210 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2211 continue; /* don't use this interface */ 2212 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2213 continue; 2214 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2215 if (ip6_use_deprecated) 2216 dep[1] = (struct in6_ifaddr *)ifa; 2217 continue; 2218 } 2219 2220 return (struct in6_ifaddr *)ifa; 2221 } 2222 2223 /* use the last-resort values, that are, deprecated addresses */ 2224 if (dep[0]) 2225 return dep[0]; 2226 if (dep[1]) 2227 return dep[1]; 2228 2229 return NULL; 2230} 2231 2232/* 2233 * perform DAD when interface becomes IFF_UP. 2234 */ 2235void 2236in6_if_up(ifp) 2237 struct ifnet *ifp; 2238{ 2239 struct ifaddr *ifa; 2240 struct in6_ifaddr *ia; 2241 int dad_delay; /* delay ticks before DAD output */ 2242 2243 /* 2244 * special cases, like 6to4, are handled in in6_ifattach 2245 */ 2246 in6_ifattach(ifp, NULL); 2247 2248 dad_delay = 0; 2249 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 2250 if (ifa->ifa_addr->sa_family != AF_INET6) 2251 continue; 2252 ia = (struct in6_ifaddr *)ifa; 2253 if (ia->ia6_flags & IN6_IFF_TENTATIVE) 2254 nd6_dad_start(ifa, &dad_delay); 2255 } 2256} 2257 2258int 2259in6if_do_dad(ifp) 2260 struct ifnet *ifp; 2261{ 2262 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 2263 return (0); 2264 2265 switch (ifp->if_type) { 2266#ifdef IFT_DUMMY 2267 case IFT_DUMMY: 2268#endif 2269 case IFT_FAITH: 2270 /* 2271 * These interfaces do not have the IFF_LOOPBACK flag, 2272 * but loop packets back. We do not have to do DAD on such 2273 * interfaces. We should even omit it, because loop-backed 2274 * NS would confuse the DAD procedure. 2275 */ 2276 return (0); 2277 default: 2278 /* 2279 * Our DAD routine requires the interface up and running. 2280 * However, some interfaces can be up before the RUNNING 2281 * status. Additionaly, users may try to assign addresses 2282 * before the interface becomes up (or running). 2283 * We simply skip DAD in such a case as a work around. 2284 * XXX: we should rather mark "tentative" on such addresses, 2285 * and do DAD after the interface becomes ready. 2286 */ 2287 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 2288 (IFF_UP|IFF_RUNNING)) 2289 return (0); 2290 2291 return (1); 2292 } 2293} 2294 2295/* 2296 * Calculate max IPv6 MTU through all the interfaces and store it 2297 * to in6_maxmtu. 2298 */ 2299void 2300in6_setmaxmtu() 2301{ 2302 unsigned long maxmtu = 0; 2303 struct ifnet *ifp; 2304 2305 IFNET_RLOCK(); 2306 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) { 2307 /* this function can be called during ifnet initialization */ 2308 if (!ifp->if_afdata[AF_INET6]) 2309 continue; 2310 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2311 IN6_LINKMTU(ifp) > maxmtu) 2312 maxmtu = IN6_LINKMTU(ifp); 2313 } 2314 IFNET_RUNLOCK(); 2315 if (maxmtu) /* update only when maxmtu is positive */ 2316 in6_maxmtu = maxmtu; 2317} 2318 2319void * 2320in6_domifattach(ifp) 2321 struct ifnet *ifp; 2322{ 2323 struct in6_ifextra *ext; 2324 2325 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2326 bzero(ext, sizeof(*ext)); 2327 2328 ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat), 2329 M_IFADDR, M_WAITOK); 2330 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat)); 2331 2332 ext->icmp6_ifstat = 2333 (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat), 2334 M_IFADDR, M_WAITOK); 2335 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat)); 2336 2337 ext->nd_ifinfo = nd6_ifattach(ifp); 2338 ext->scope6_id = scope6_ifattach(ifp); 2339 return ext; 2340} 2341 2342void 2343in6_domifdetach(ifp, aux) 2344 struct ifnet *ifp; 2345 void *aux; 2346{ 2347 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2348 2349 scope6_ifdetach(ext->scope6_id); 2350 nd6_ifdetach(ext->nd_ifinfo); 2351 free(ext->in6_ifstat, M_IFADDR); 2352 free(ext->icmp6_ifstat, M_IFADDR); 2353 free(ext, M_IFADDR); 2354} 2355 2356/* 2357 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2358 * v4 mapped addr or v4 compat addr 2359 */ 2360void 2361in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2362{ 2363 bzero(sin, sizeof(*sin)); 2364 sin->sin_len = sizeof(struct sockaddr_in); 2365 sin->sin_family = AF_INET; 2366 sin->sin_port = sin6->sin6_port; 2367 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2368} 2369 2370/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2371void 2372in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2373{ 2374 bzero(sin6, sizeof(*sin6)); 2375 sin6->sin6_len = sizeof(struct sockaddr_in6); 2376 sin6->sin6_family = AF_INET6; 2377 sin6->sin6_port = sin->sin_port; 2378 sin6->sin6_addr.s6_addr32[0] = 0; 2379 sin6->sin6_addr.s6_addr32[1] = 0; 2380 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2381 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2382} 2383 2384/* Convert sockaddr_in6 into sockaddr_in. */ 2385void 2386in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2387{ 2388 struct sockaddr_in *sin_p; 2389 struct sockaddr_in6 sin6; 2390 2391 /* 2392 * Save original sockaddr_in6 addr and convert it 2393 * to sockaddr_in. 2394 */ 2395 sin6 = *(struct sockaddr_in6 *)nam; 2396 sin_p = (struct sockaddr_in *)nam; 2397 in6_sin6_2_sin(sin_p, &sin6); 2398} 2399 2400/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2401void 2402in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2403{ 2404 struct sockaddr_in *sin_p; 2405 struct sockaddr_in6 *sin6_p; 2406 2407 MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME, 2408 M_WAITOK); 2409 sin_p = (struct sockaddr_in *)*nam; 2410 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2411 FREE(*nam, M_SONAME); 2412 *nam = (struct sockaddr *)sin6_p; 2413} 2414