1267 lines
33 KiB
C
1267 lines
33 KiB
C
/*
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* Copyright (c) 2003-2021 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sockio.h>
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#include <sys/kernel.h>
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#include <sys/syslog.h>
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#include <libkern/crypto/sha2.h>
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#include <libkern/OSAtomic.h>
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#include <kern/locks.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/route.h>
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#include <net/kpi_protocol.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/if_ether.h>
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#include <netinet/in_pcb.h>
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#include <netinet/icmp6.h>
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/in6_var.h>
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#include <netinet6/in6_pcb.h>
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#include <netinet6/in6_ifattach.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/nd6.h>
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#include <netinet6/scope6_var.h>
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#include <net/net_osdep.h>
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#include <dev/random/randomdev.h>
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#include <net/sockaddr_utils.h>
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u_int32_t in6_maxmtu = 0;
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#if IP6_AUTO_LINKLOCAL
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int ip6_auto_linklocal = IP6_AUTO_LINKLOCAL;
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#else
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int ip6_auto_linklocal = 1; /* enable by default */
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#endif
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extern struct inpcbinfo udbinfo;
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extern struct inpcbinfo ripcbinfo;
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static int get_rand_iid(struct ifnet *, struct in6_addr *);
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static int in6_generate_tmp_iid(u_int8_t *, const u_int8_t *, u_int8_t *);
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static int in6_select_iid_from_all_hw(struct ifnet *, struct ifnet *,
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struct in6_addr *);
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static int in6_ifattach_linklocal(struct ifnet *, struct in6_aliasreq *);
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static int in6_ifattach_loopback(struct ifnet *);
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/*
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* Generate a last-resort interface identifier, when the machine has no
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* IEEE802/EUI64 address sources.
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* The goal here is to get an interface identifier that is
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* (1) random enough and (2) does not change across reboot.
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* We currently use SHA256(hostname) for it.
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*
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* in6 - upper 64bits are preserved
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*/
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static int
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get_rand_iid(
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__unused struct ifnet *ifp,
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struct in6_addr *in6) /* upper 64bits are preserved */
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{
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SHA256_CTX ctxt;
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u_int8_t digest[SHA256_DIGEST_LENGTH];
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size_t hostnlen;
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/* generate 8 bytes of pseudo-random value. */
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bzero(&ctxt, sizeof(ctxt));
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SHA256_Init(&ctxt);
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lck_mtx_lock(&hostname_lock);
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hostnlen = strlen(hostname);
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SHA256_Update(&ctxt, hostname, hostnlen);
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lck_mtx_unlock(&hostname_lock);
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SHA256_Final(digest, &ctxt);
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/* assumes sizeof (digest) > sizeof (iid) */
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bcopy(digest, &in6->s6_addr[8], 8);
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/* make sure to set "u" bit to local, and "g" bit to individual. */
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in6->s6_addr[8] &= ~ND6_EUI64_GBIT; /* g bit to "individual" */
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in6->s6_addr[8] |= ND6_EUI64_UBIT; /* u bit to "local" */
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/* convert EUI64 into IPv6 interface identifier */
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ND6_EUI64_TO_IFID(in6);
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return 0;
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}
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static int
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in6_generate_tmp_iid(
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u_int8_t *seed0,
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const u_int8_t *seed1,
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u_int8_t *ret)
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{
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SHA256_CTX ctxt;
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u_int8_t seed[16], nullbuf[8], digest[SHA256_DIGEST_LENGTH];
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u_int32_t val32;
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struct timeval tv;
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/* If there's no history, start with a random seed. */
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bzero(nullbuf, sizeof(nullbuf));
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if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
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int i;
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for (i = 0; i < 2; i++) {
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getmicrotime(&tv);
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val32 = RandomULong() ^ tv.tv_usec;
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bcopy(&val32, seed + sizeof(val32) * i,
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sizeof(val32));
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}
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} else {
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bcopy(seed0, seed, 8);
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}
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/* copy the right-most 64-bits of the given address */
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/* XXX assumption on the size of IFID */
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bcopy(seed1, &seed[8], 8);
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#if DEVELOPMENT || DEBUG
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if ((0)) { /* for debugging purposes only */
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int i;
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printf("%s: new randomized ID from: ", __func__);
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for (i = 0; i < 16; i++) {
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printf("%02x", seed[i]);
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}
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printf(" ");
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}
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#endif /* DEVELOPMENT || DEBUG */
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/* generate 16 bytes of pseudo-random value. */
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bzero(&ctxt, sizeof(ctxt));
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SHA256_Init(&ctxt);
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SHA256_Update(&ctxt, seed, sizeof(seed));
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SHA256_Final(digest, &ctxt);
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/*
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* RFC 4941 3.2.1. (3)
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* Take the left-most 64-bits of the SHA256 digest and set bit 6 (the
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* left-most bit is numbered 0) to zero.
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*/
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bcopy(digest, ret, 8);
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ret[0] &= ~ND6_EUI64_UBIT;
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/*
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* XXX: we'd like to ensure that the generated value is not zero
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* for simplicity. If the caclculated digest happens to be zero,
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* use a random non-zero value as the last resort.
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*/
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if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
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nd6log(info,
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"%s: computed SHA256 value is zero.\n", __func__);
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getmicrotime(&tv);
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val32 = random() ^ tv.tv_usec;
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val32 = 1 + (val32 % (0xffffffff - 1));
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}
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/*
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* RFC 4941 3.2.1. (4)
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* Take the next 64-bits of the SHA256 digest and save them in
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* stable storage as the history value to be used in the next
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* iteration of the algorithm.
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*/
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bcopy(&digest[8], seed0, 8);
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#if DEVELOPMENT || DEBUG
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if ((0)) { /* for debugging purposes only */
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int i;
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printf("to: ");
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for (i = 0; i < 16; i++) {
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printf("%02x", digest[i]);
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}
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printf("\n");
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}
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#endif
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return 0;
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}
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/*
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* Get interface identifier for the specified interface using the method in
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* Appendix A of RFC 4291.
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*
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* XXX assumes single sockaddr_dl (AF_LINK address) per an interface
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*
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* in6 - upper 64bits are preserved
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*/
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int
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in6_iid_from_hw(struct ifnet *ifp, struct in6_addr *in6)
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{
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struct ifaddr *ifa = NULL;
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struct sockaddr_dl *sdl;
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u_int8_t *addr;
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size_t addrlen;
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static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
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static u_int8_t allone[8] =
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{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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int err = -1;
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/* Why doesn't this code use ifnet_addrs? */
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ifnet_lock_shared(ifp);
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ifa = ifp->if_lladdr;
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sdl = SDL(ifa->ifa_addr);
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if (sdl->sdl_alen == 0) {
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ifnet_lock_done(ifp);
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return -1;
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}
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ifa_addref(ifa); /* for this routine */
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ifnet_lock_done(ifp);
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IFA_LOCK(ifa);
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addr = (u_int8_t *) LLADDR(sdl);
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addrlen = sdl->sdl_alen;
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/* get EUI64 */
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switch (ifp->if_type) {
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case IFT_ETHER:
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case IFT_FDDI:
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case IFT_ISO88025:
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case IFT_ATM:
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case IFT_IEEE1394:
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case IFT_L2VLAN:
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case IFT_IEEE8023ADLAG:
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#if IFT_IEEE80211
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case IFT_IEEE80211:
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#endif
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case IFT_BRIDGE:
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/* IEEE802/EUI64 cases - what others? */
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/* IEEE1394 uses 16byte length address starting with EUI64 */
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if (addrlen > 8) {
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addrlen = 8;
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}
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/* look at IEEE802/EUI64 only */
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if (addrlen != 8 && addrlen != 6) {
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goto done;
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}
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/*
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* check for invalid MAC address - on bsdi, we see it a lot
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* since wildboar configures all-zero MAC on pccard before
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* card insertion.
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*/
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if (bcmp(addr, allzero, addrlen) == 0) {
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goto done;
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}
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if (bcmp(addr, allone, addrlen) == 0) {
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goto done;
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}
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/* make EUI64 address */
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if (addrlen == 8) {
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bcopy(addr, &in6->s6_addr[8], 8);
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} else if (addrlen == 6) {
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in6->s6_addr[8] = addr[0];
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in6->s6_addr[9] = addr[1];
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in6->s6_addr[10] = addr[2];
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in6->s6_addr[11] = 0xff;
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in6->s6_addr[12] = 0xfe;
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in6->s6_addr[13] = addr[3];
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in6->s6_addr[14] = addr[4];
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in6->s6_addr[15] = addr[5];
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}
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break;
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case IFT_ARCNET:
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if (addrlen != 1) {
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goto done;
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}
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if (!addr[0]) {
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goto done;
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}
|
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|
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bzero(&in6->s6_addr[8], 8);
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in6->s6_addr[15] = addr[0];
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|
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/*
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* due to insufficient bitwidth, we mark it local.
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*/
|
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in6->s6_addr[8] &= ~ND6_EUI64_GBIT; /* g to "individual" */
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in6->s6_addr[8] |= ND6_EUI64_UBIT; /* u to "local" */
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break;
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case IFT_GIF:
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#if IFT_STF
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case IFT_STF:
|
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#endif
|
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/*
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* RFC2893 says: "SHOULD use IPv4 address as IID source".
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* however, IPv4 address is not very suitable as unique
|
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* identifier source (can be renumbered).
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* we don't do this.
|
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*/
|
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goto done;
|
|
|
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case IFT_CELLULAR:
|
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goto done;
|
|
|
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default:
|
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goto done;
|
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}
|
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|
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/* sanity check: g bit must not indicate "group" */
|
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if (ND6_EUI64_GROUP(in6)) {
|
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goto done;
|
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}
|
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|
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/* convert EUI64 into IPv6 interface identifier */
|
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ND6_EUI64_TO_IFID(in6);
|
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|
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/*
|
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* sanity check: iid must not be all zero, avoid conflict with
|
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* subnet router anycast
|
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*/
|
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if ((in6->s6_addr[8] & ~(ND6_EUI64_GBIT | ND6_EUI64_UBIT)) == 0x00 &&
|
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bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
|
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goto done;
|
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}
|
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|
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err = 0; /* found */
|
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done:
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IFA_UNLOCK(ifa);
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ifa_remref(ifa);
|
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return err;
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}
|
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|
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/*
|
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* Get interface identifier for the specified interface using the method in
|
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* Appendix A of RFC 4291. If it is not available on ifp0, borrow interface
|
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* identifier from other information sources.
|
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*
|
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* ifp - primary EUI64 source
|
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* altifp - secondary EUI64 source
|
|
* in6 - IPv6 address to output IID
|
|
*/
|
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static int
|
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in6_select_iid_from_all_hw(
|
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struct ifnet *ifp0,
|
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struct ifnet *altifp, /* secondary EUI64 source */
|
|
struct in6_addr *in6)
|
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{
|
|
struct ifnet *ifp;
|
|
|
|
/* first, try to get it from the interface itself */
|
|
if (in6_iid_from_hw(ifp0, in6) == 0) {
|
|
nd6log(debug, "%s: IID derived from HW interface.\n",
|
|
if_name(ifp0));
|
|
goto success;
|
|
}
|
|
|
|
/* try secondary EUI64 source. this basically is for ATM PVC */
|
|
if (altifp && in6_iid_from_hw(altifp, in6) == 0) {
|
|
nd6log(debug, "%s: IID from alterate HW interface %s.\n",
|
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if_name(ifp0), if_name(altifp));
|
|
goto success;
|
|
}
|
|
|
|
/* next, try to get it from some other hardware interface */
|
|
ifnet_head_lock_shared();
|
|
TAILQ_FOREACH(ifp, &ifnet_head, if_list) {
|
|
if (ifp == ifp0) {
|
|
continue;
|
|
}
|
|
if (in6_iid_from_hw(ifp, in6) != 0) {
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* to borrow IID from other interface, IID needs to be
|
|
* globally unique
|
|
*/
|
|
if (ND6_IFID_UNIVERSAL(in6)) {
|
|
nd6log(debug, "%s: borrowed IID from %s\n",
|
|
if_name(ifp0), if_name(ifp));
|
|
ifnet_head_done();
|
|
goto success;
|
|
}
|
|
}
|
|
ifnet_head_done();
|
|
|
|
/* last resort: get from random number source */
|
|
if (get_rand_iid(ifp, in6) == 0) {
|
|
nd6log(debug, "%s: IID from PRNG.\n", if_name(ifp0));
|
|
goto success;
|
|
}
|
|
|
|
printf("%s: failed to get interface identifier\n", if_name(ifp0));
|
|
return -1;
|
|
|
|
success:
|
|
nd6log(info, "%s: IID: "
|
|
"%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
if_name(ifp0),
|
|
in6->s6_addr[8], in6->s6_addr[9],
|
|
in6->s6_addr[10], in6->s6_addr[11],
|
|
in6->s6_addr[12], in6->s6_addr[13],
|
|
in6->s6_addr[14], in6->s6_addr[15]);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
in6_ifattach_linklocal(struct ifnet *ifp, struct in6_aliasreq *ifra)
|
|
{
|
|
struct in6_ifaddr *ia;
|
|
struct nd_prefix pr0, *pr;
|
|
int i, error;
|
|
|
|
VERIFY(ifra != NULL);
|
|
|
|
proto_plumb(PF_INET6, ifp);
|
|
|
|
error = in6_update_ifa(ifp, ifra, IN6_IFAUPDATE_DADDELAY, &ia);
|
|
if (error != 0) {
|
|
/*
|
|
* XXX: When the interface does not support IPv6, this call
|
|
* would fail in the SIOCSIFADDR ioctl. I believe the
|
|
* notification is rather confusing in this case, so just
|
|
* suppress it. (jinmei@kame.net 20010130)
|
|
*/
|
|
if (error != EAFNOSUPPORT) {
|
|
nd6log(info, "%s: failed to "
|
|
"configure a link-local address on %s "
|
|
"(errno=%d)\n",
|
|
__func__, if_name(ifp), error);
|
|
}
|
|
return EADDRNOTAVAIL;
|
|
}
|
|
VERIFY(ia != NULL);
|
|
|
|
/*
|
|
* Make the link-local prefix (fe80::%link/64) as on-link.
|
|
* Since we'd like to manage prefixes separately from addresses,
|
|
* we make an ND6 prefix structure for the link-local prefix,
|
|
* and add it to the prefix list as a never-expire prefix.
|
|
* XXX: this change might affect some existing code base...
|
|
*/
|
|
bzero(&pr0, sizeof(pr0));
|
|
lck_mtx_init(&pr0.ndpr_lock, &ifa_mtx_grp, &ifa_mtx_attr);
|
|
pr0.ndpr_ifp = ifp;
|
|
/* this should be 64 at this moment. */
|
|
pr0.ndpr_plen = (u_char)in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, NULL);
|
|
pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr;
|
|
pr0.ndpr_prefix = ifra->ifra_addr;
|
|
/* apply the mask for safety. (nd6_prelist_add will apply it again) */
|
|
for (i = 0; i < 4; i++) {
|
|
pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
|
|
in6mask64.s6_addr32[i];
|
|
}
|
|
/*
|
|
* Initialize parameters. The link-local prefix must always be
|
|
* on-link, and its lifetimes never expire.
|
|
*/
|
|
pr0.ndpr_raf_onlink = 1;
|
|
pr0.ndpr_raf_auto = 1; /* probably meaningless */
|
|
pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
|
|
pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
|
|
pr0.ndpr_stateflags |= NDPRF_STATIC;
|
|
/*
|
|
* Since there is no other link-local addresses, nd6_prefix_lookup()
|
|
* probably returns NULL. However, we cannot always expect the result.
|
|
* For example, if we first remove the (only) existing link-local
|
|
* address, and then reconfigure another one, the prefix is still
|
|
* valid with referring to the old link-local address.
|
|
*/
|
|
if ((pr = nd6_prefix_lookup(&pr0, ND6_PREFIX_EXPIRY_UNSPEC)) == NULL) {
|
|
if ((error = nd6_prelist_add(&pr0, NULL, &pr, TRUE)) != 0) {
|
|
ifa_remref(&ia->ia_ifa);
|
|
lck_mtx_destroy(&pr0.ndpr_lock, &ifa_mtx_grp);
|
|
return error;
|
|
}
|
|
}
|
|
|
|
in6_post_msg(ifp, KEV_INET6_NEW_LL_ADDR, ia, NULL);
|
|
ifa_remref(&ia->ia_ifa);
|
|
|
|
/* Drop use count held above during lookup/add */
|
|
if (pr != NULL) {
|
|
NDPR_REMREF(pr);
|
|
}
|
|
|
|
lck_mtx_destroy(&pr0.ndpr_lock, &ifa_mtx_grp);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
in6_ifattach_loopback(
|
|
struct ifnet *ifp) /* must be IFT_LOOP */
|
|
{
|
|
struct in6_aliasreq ifra;
|
|
struct in6_ifaddr *ia;
|
|
int error;
|
|
|
|
bzero(&ifra, sizeof(ifra));
|
|
|
|
/*
|
|
* in6_update_ifa() does not use ifra_name, but we accurately set it
|
|
* for safety.
|
|
*/
|
|
strlcpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
|
|
|
|
ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
|
|
ifra.ifra_prefixmask.sin6_family = AF_INET6;
|
|
ifra.ifra_prefixmask.sin6_addr = in6mask128;
|
|
|
|
/*
|
|
* Always initialize ia_dstaddr (= broadcast address) to loopback
|
|
* address. Follows IPv4 practice - see in_ifinit().
|
|
*/
|
|
ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
|
|
ifra.ifra_dstaddr.sin6_family = AF_INET6;
|
|
ifra.ifra_dstaddr.sin6_addr = in6addr_loopback;
|
|
|
|
ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
|
|
ifra.ifra_addr.sin6_family = AF_INET6;
|
|
ifra.ifra_addr.sin6_addr = in6addr_loopback;
|
|
|
|
/* the loopback address should NEVER expire. */
|
|
ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
|
|
ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
|
|
|
|
/* we don't need to perform DAD on loopback interfaces. */
|
|
ifra.ifra_flags |= IN6_IFF_NODAD;
|
|
|
|
/* add the new interface address */
|
|
error = in6_update_ifa(ifp, &ifra, 0, &ia);
|
|
if (error != 0) {
|
|
nd6log(error,
|
|
"%s: failed to configure loopback address %s (error=%d)\n",
|
|
__func__, if_name(ifp), error);
|
|
VERIFY(ia == NULL);
|
|
return EADDRNOTAVAIL;
|
|
}
|
|
|
|
VERIFY(ia != NULL);
|
|
ifa_remref(&ia->ia_ifa);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* compute NI group address, based on the current hostname setting.
|
|
* see RFC 4620.
|
|
*
|
|
* when ifp == NULL, the caller is responsible for filling scopeid.
|
|
*/
|
|
int
|
|
in6_nigroup(
|
|
struct ifnet *ifp,
|
|
const char *name,
|
|
size_t namelen,
|
|
struct in6_addr *in6,
|
|
uint32_t *ifscopep)
|
|
{
|
|
const char *p;
|
|
u_char *q;
|
|
SHA256_CTX ctxt;
|
|
u_int8_t digest[SHA256_DIGEST_LENGTH];
|
|
size_t l;
|
|
char n[64]; /* a single label must not exceed 63 chars */
|
|
|
|
if (!namelen || !name) {
|
|
return -1;
|
|
}
|
|
|
|
p = name;
|
|
while (p && *p && *p != '.' && p - name < namelen) {
|
|
p++;
|
|
}
|
|
if (p - name > sizeof(n) - 1) {
|
|
return -1; /* label too long */
|
|
}
|
|
l = p - name;
|
|
strlcpy(n, name, l);
|
|
n[(int)l] = '\0';
|
|
for (q = (u_char *) n; *q; q++) {
|
|
if ('A' <= *q && *q <= 'Z') {
|
|
*q = *q - 'A' + 'a';
|
|
}
|
|
}
|
|
|
|
/* generate 16 bytes of pseudo-random value. */
|
|
bzero(&ctxt, sizeof(ctxt));
|
|
SHA256_Init(&ctxt);
|
|
SHA256_Update(&ctxt, &l, sizeof(l));
|
|
SHA256_Update(&ctxt, n, l);
|
|
SHA256_Final(digest, &ctxt);
|
|
|
|
bzero(in6, sizeof(*in6));
|
|
in6->s6_addr16[0] = IPV6_ADDR_INT16_MLL;
|
|
in6->s6_addr8[11] = 2;
|
|
in6->s6_addr8[12] = 0xff;
|
|
/* copy first 3 bytes of prefix into address */
|
|
bcopy(digest, &in6->s6_addr8[13], 3);
|
|
if (in6_setscope(in6, ifp, ifscopep)) {
|
|
return -1; /* XXX: should not fail */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
in6_domifattach(struct ifnet *ifp)
|
|
{
|
|
int error;
|
|
|
|
VERIFY(ifp != NULL);
|
|
|
|
error = proto_plumb(PF_INET6, ifp);
|
|
if (error != 0) {
|
|
if (error != EEXIST) {
|
|
log(LOG_ERR, "%s: proto_plumb returned %d if=%s\n",
|
|
__func__, error, if_name(ifp));
|
|
}
|
|
} else {
|
|
error = in6_ifattach_prelim(ifp);
|
|
if (error != 0) {
|
|
int errorx;
|
|
|
|
log(LOG_ERR,
|
|
"%s: in6_ifattach_prelim returned %d if=%s%d\n",
|
|
__func__, error, ifp->if_name, ifp->if_unit);
|
|
|
|
errorx = proto_unplumb(PF_INET6, ifp);
|
|
if (errorx != 0) { /* XXX should not fail */
|
|
log(LOG_ERR,
|
|
"%s: proto_unplumb returned %d if=%s%d\n",
|
|
__func__, errorx, ifp->if_name,
|
|
ifp->if_unit);
|
|
}
|
|
}
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
in6_ifattach_prelim(struct ifnet *ifp)
|
|
{
|
|
int error = 0;
|
|
struct in6_ifaddr *ia6 = NULL;
|
|
|
|
VERIFY(ifp != NULL);
|
|
|
|
/* quirks based on interface type */
|
|
switch (ifp->if_type) {
|
|
#if IFT_STF
|
|
case IFT_STF:
|
|
/*
|
|
* 6to4 interface is a very special kind of beast.
|
|
* no multicast, no linklocal. RFC2529 specifies how to make
|
|
* linklocals for 6to4 interface, but there's no use and
|
|
* it is rather harmful to have one.
|
|
*/
|
|
goto skipmcast;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* IPv6 requires multicast capability at the interface.
|
|
* (previously, this was a silent error.)
|
|
*/
|
|
if ((ifp->if_flags & IFF_MULTICAST) == 0) {
|
|
nd6log0(info, "in6_ifattach: %s is not multicast capable, IPv6 not enabled\n",
|
|
if_name(ifp));
|
|
return EINVAL;
|
|
}
|
|
|
|
#if IFT_STF
|
|
skipmcast:
|
|
#endif
|
|
|
|
if (ifp->if_inet6data == NULL) {
|
|
ifp->if_inet6data = zalloc_permanent_type(struct in6_ifextra);
|
|
} else {
|
|
/*
|
|
* Since the structure is never freed, we need to zero out
|
|
* some of its members. We avoid zeroing out the scope6
|
|
* structure on purpose because other threads might be
|
|
* using its contents.
|
|
*/
|
|
bzero(&IN6_IFEXTRA(ifp)->icmp6_ifstat,
|
|
sizeof(IN6_IFEXTRA(ifp)->icmp6_ifstat));
|
|
bzero(&IN6_IFEXTRA(ifp)->in6_ifstat,
|
|
sizeof(IN6_IFEXTRA(ifp)->in6_ifstat));
|
|
/*
|
|
* XXX When recycling, nd_ifinfo gets initialized, other
|
|
* than the lock, inside nd6_ifattach
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* XXX Only initialize IPv6 configuration for the interface
|
|
* if interface has not yet been configured with
|
|
* link local IPv6 address.
|
|
* Could possibly be optimized with an interface flag if need
|
|
* be. For now using in6ifa_ifpforlinklocal.
|
|
*/
|
|
ia6 = in6ifa_ifpforlinklocal(ifp, 0);
|
|
if (ia6 == NULL) {
|
|
IN6_IFEXTRA(ifp)->netsig_len = 0;
|
|
bzero(&IN6_IFEXTRA(ifp)->netsig,
|
|
sizeof(IN6_IFEXTRA(ifp)->netsig));
|
|
bzero(IN6_IFEXTRA(ifp)->nat64_prefixes,
|
|
sizeof(IN6_IFEXTRA(ifp)->nat64_prefixes));
|
|
/* initialize NDP variables */
|
|
nd6_ifattach(ifp);
|
|
} else {
|
|
VERIFY(ND_IFINFO(ifp)->initialized);
|
|
ifa_remref(&ia6->ia_ifa);
|
|
ia6 = NULL;
|
|
}
|
|
scope6_ifattach(ifp);
|
|
|
|
/* initialize loopback interface address */
|
|
if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
|
|
error = in6_ifattach_loopback(ifp);
|
|
if (error != 0) {
|
|
log(LOG_ERR, "%s: in6_ifattach_loopback returned %d\n",
|
|
__func__, error);
|
|
return error;
|
|
}
|
|
}
|
|
|
|
/* update dynamically. */
|
|
if (in6_maxmtu < ifp->if_mtu) {
|
|
in6_maxmtu = ifp->if_mtu;
|
|
}
|
|
|
|
VERIFY(error == 0);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This routine is only meant to configure IPv6 Link Local
|
|
* addresses.
|
|
*/
|
|
int
|
|
in6_ifattach_aliasreq(struct ifnet *ifp, struct ifnet *altifp,
|
|
struct in6_aliasreq *ifra0)
|
|
{
|
|
int error;
|
|
struct in6_ifaddr *ia6;
|
|
struct in6_aliasreq ifra;
|
|
|
|
error = in6_ifattach_prelim(ifp);
|
|
if (error != 0) {
|
|
return error;
|
|
}
|
|
|
|
if (!ip6_auto_linklocal) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Assign a link-local address, only if there isn't one here already.
|
|
* XXX If we ever allow more than one LLA on the interface
|
|
* make sure that the corresponding prefix on the prefixlist
|
|
* is reference counted and the address's prefix pointer
|
|
* points to the prefix.
|
|
*/
|
|
ia6 = in6ifa_ifpforlinklocal(ifp, 0);
|
|
if (ia6 != NULL) {
|
|
ifa_remref(&ia6->ia_ifa);
|
|
return 0;
|
|
}
|
|
|
|
bzero(&ifra, sizeof(ifra));
|
|
|
|
/*
|
|
* in6_update_ifa() does not use ifra_name, but we accurately set it
|
|
* for safety.
|
|
*/
|
|
strlcpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
|
|
|
|
/* Initialize the IPv6 interface address in our in6_aliasreq block */
|
|
if (ifra0 != NULL) {
|
|
/* interface provided both addresses for us */
|
|
struct sockaddr_in6 *sin6 = &ifra.ifra_addr;
|
|
struct in6_addr *in6 = &sin6->sin6_addr;
|
|
boolean_t ok = TRUE;
|
|
|
|
SOCKADDR_COPY(&ifra0->ifra_addr, sin6, sizeof(struct sockaddr_in6));
|
|
|
|
if (sin6->sin6_family != AF_INET6 || sin6->sin6_port != 0) {
|
|
ok = FALSE;
|
|
}
|
|
if (ok && (in6->s6_addr16[0] != htons(0xfe80))) {
|
|
ok = FALSE;
|
|
}
|
|
|
|
if (ok) {
|
|
if (sin6->sin6_scope_id == 0 && in6->s6_addr16[1] == 0) {
|
|
if (in6_embedded_scope) {
|
|
in6->s6_addr16[1] = htons(ifp->if_index);
|
|
} else {
|
|
sin6->sin6_scope_id = ifp->if_index;
|
|
}
|
|
} else if (sin6->sin6_scope_id != 0 &&
|
|
sin6->sin6_scope_id != ifp->if_index) {
|
|
ok = FALSE;
|
|
} else if (in6_embedded_scope && in6->s6_addr16[1] != 0 &&
|
|
ntohs(in6->s6_addr16[1]) != ifp->if_index) {
|
|
ok = FALSE;
|
|
}
|
|
}
|
|
if (ok && (in6->s6_addr32[1] != 0)) {
|
|
ok = FALSE;
|
|
}
|
|
if (!ok) {
|
|
return EINVAL;
|
|
}
|
|
} else {
|
|
ifra.ifra_addr.sin6_family = AF_INET6;
|
|
ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
|
|
ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80);
|
|
if (in6_embedded_scope) {
|
|
ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
|
|
} else {
|
|
ifra.ifra_addr.sin6_addr.s6_addr16[1] = 0;
|
|
ifra.ifra_addr.sin6_scope_id = ifp->if_index;
|
|
}
|
|
ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
|
|
if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
|
|
ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
|
|
ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
|
|
if (!in6_embedded_scope) {
|
|
ifra.ifra_addr.sin6_scope_id = ifp->if_index;
|
|
}
|
|
} else {
|
|
if (in6_select_iid_from_all_hw(ifp, altifp,
|
|
&ifra.ifra_addr.sin6_addr) != 0) {
|
|
nd6log(error, "%s: no IID available\n",
|
|
if_name(ifp));
|
|
return EADDRNOTAVAIL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (in6_setscope(&ifra.ifra_addr.sin6_addr, ifp, IN6_NULL_IF_EMBEDDED_SCOPE(&ifra.ifra_addr.sin6_scope_id))) {
|
|
return EADDRNOTAVAIL;
|
|
}
|
|
|
|
/* Set the prefix mask */
|
|
ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
|
|
ifra.ifra_prefixmask.sin6_family = AF_INET6;
|
|
ifra.ifra_prefixmask.sin6_addr = in6mask64;
|
|
|
|
/* link-local addresses should NEVER expire. */
|
|
ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
|
|
ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
|
|
|
|
/* Attach the link-local address */
|
|
if (in6_ifattach_linklocal(ifp, &ifra) != 0) {
|
|
nd6log(info,
|
|
"%s: %s could not attach link-local address.\n",
|
|
__func__, if_name(ifp));
|
|
/* NB: not an error */
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
in6_ifattach_llcgareq(struct ifnet *ifp, struct in6_cgareq *llcgasr)
|
|
{
|
|
struct in6_aliasreq ifra;
|
|
struct in6_ifaddr *ia6 = NULL;
|
|
struct nd_ifinfo *ndi = NULL;
|
|
int error;
|
|
|
|
VERIFY(llcgasr != NULL);
|
|
|
|
error = in6_ifattach_prelim(ifp);
|
|
if (error != 0) {
|
|
return error;
|
|
}
|
|
|
|
if (!ip6_auto_linklocal) {
|
|
return 0;
|
|
}
|
|
|
|
if (nd6_send_opstate == ND6_SEND_OPMODE_DISABLED) {
|
|
return ENXIO;
|
|
}
|
|
|
|
ndi = ND_IFINFO(ifp);
|
|
VERIFY(ndi != NULL && ndi->initialized);
|
|
if ((ndi->flags & ND6_IFF_INSECURE) != 0) {
|
|
return ENXIO;
|
|
}
|
|
|
|
/*
|
|
* Assign a link-local address, only if there isn't one here already.
|
|
* XXX If we ever allow more than one LLA on the interface
|
|
* make sure that the corresponding prefix on the prefixlist
|
|
* is reference counted and the address's prefix pointer
|
|
* points to the prefix.
|
|
*/
|
|
ia6 = in6ifa_ifpforlinklocal(ifp, 0);
|
|
if (ia6 != NULL) {
|
|
ifa_remref(&ia6->ia_ifa);
|
|
return 0;
|
|
}
|
|
|
|
bzero(&ifra, sizeof(ifra));
|
|
strlcpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
|
|
|
|
ifra.ifra_addr.sin6_family = AF_INET6;
|
|
ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
|
|
ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80);
|
|
ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
|
|
ifra.ifra_flags = IN6_IFF_SECURED;
|
|
|
|
in6_cga_node_lock();
|
|
if (in6_cga_generate(&llcgasr->cgar_cgaprep, llcgasr->cgar_collision_count,
|
|
&ifra.ifra_addr.sin6_addr, ifp)) {
|
|
in6_cga_node_unlock();
|
|
return EADDRNOTAVAIL;
|
|
}
|
|
in6_cga_node_unlock();
|
|
if (in6_embedded_scope) {
|
|
ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
|
|
} else {
|
|
ifra.ifra_addr.sin6_addr.s6_addr16[1] = 0;
|
|
}
|
|
|
|
if (in6_setscope(&ifra.ifra_addr.sin6_addr, ifp, IN6_NULL_IF_EMBEDDED_SCOPE(&ifra.ifra_addr.sin6_scope_id))) {
|
|
return EADDRNOTAVAIL;
|
|
}
|
|
|
|
/* Set the prefix mask */
|
|
ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
|
|
ifra.ifra_prefixmask.sin6_family = AF_INET6;
|
|
ifra.ifra_prefixmask.sin6_addr = in6mask64;
|
|
|
|
/*
|
|
* link-local addresses should NEVER expire, but cryptographic
|
|
* ones may have finite preferred lifetime [if it's important to
|
|
* keep them from being used by applications as persistent device
|
|
* identifiers].
|
|
*/
|
|
ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
|
|
ifra.ifra_lifetime.ia6t_pltime = llcgasr->cgar_lifetime.ia6t_pltime;
|
|
|
|
/* Attach the link-local address */
|
|
if (in6_ifattach_linklocal(ifp, &ifra) != 0) {
|
|
/* NB: not an error */
|
|
nd6log(info,
|
|
"%s: %s could not attach link-local address.\n",
|
|
__func__, if_name(ifp));
|
|
}
|
|
|
|
VERIFY(error == 0);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* NOTE: in6_ifdetach() does not support loopback if at this moment.
|
|
*/
|
|
void
|
|
in6_ifdetach(struct ifnet *ifp)
|
|
{
|
|
struct in6_ifaddr *ia, *nia;
|
|
struct ifaddr *ifa;
|
|
struct rtentry *rt;
|
|
struct sockaddr_in6 sin6;
|
|
struct in6_multi_mship *imm;
|
|
int unlinked;
|
|
|
|
LCK_MTX_ASSERT(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED);
|
|
|
|
/* remove neighbor management table */
|
|
nd6_purge(ifp);
|
|
|
|
/* nuke any of IPv6 addresses we have */
|
|
lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
|
|
boolean_t from_begining = TRUE;
|
|
while (from_begining) {
|
|
from_begining = FALSE;
|
|
TAILQ_FOREACH(ia, &in6_ifaddrhead, ia6_link) {
|
|
if (ia->ia_ifa.ifa_ifp != ifp) {
|
|
continue;
|
|
}
|
|
ifa_addref(&ia->ia_ifa); /* for us */
|
|
lck_rw_done(&in6_ifaddr_rwlock);
|
|
in6_purgeaddr(&ia->ia_ifa);
|
|
ifa_remref(&ia->ia_ifa); /* for us */
|
|
lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
|
|
/*
|
|
* Purging the address caused in6_ifaddr_rwlock
|
|
* to be dropped and reacquired;
|
|
* therefore search again from the beginning
|
|
* of in6_ifaddrs list.
|
|
*/
|
|
from_begining = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
lck_rw_done(&in6_ifaddr_rwlock);
|
|
|
|
ifnet_lock_exclusive(ifp);
|
|
|
|
/* undo everything done by in6_ifattach(), just in case */
|
|
ifa = TAILQ_FIRST(&ifp->if_addrlist);
|
|
while (ifa != NULL) {
|
|
IFA_LOCK(ifa);
|
|
if (ifa->ifa_addr->sa_family != AF_INET6 ||
|
|
!IN6_IS_ADDR_LINKLOCAL(&SIN6(ifa->ifa_addr)->sin6_addr)) {
|
|
IFA_UNLOCK(ifa);
|
|
ifa = TAILQ_NEXT(ifa, ifa_list);
|
|
continue;
|
|
}
|
|
|
|
ia = (struct in6_ifaddr *)ifa;
|
|
|
|
/* hold a reference for this routine */
|
|
ifa_addref(ifa);
|
|
/* remove from the linked list */
|
|
if_detach_ifa(ifp, ifa);
|
|
IFA_UNLOCK(ifa);
|
|
|
|
/*
|
|
* Leaving the multicast group(s) may involve freeing the
|
|
* link address multicast structure(s) for the interface,
|
|
* which is protected by ifnet lock. To avoid violating
|
|
* lock ordering, we must drop ifnet lock before doing so.
|
|
* The ifa won't go away since we held a refcnt above.
|
|
*/
|
|
ifnet_lock_done(ifp);
|
|
|
|
/*
|
|
* We have to do this work manually here instead of calling
|
|
* in6_purgeaddr() since in6_purgeaddr() uses the RTM_HOST flag.
|
|
*/
|
|
|
|
/*
|
|
* leave from multicast groups we have joined for the interface
|
|
*/
|
|
IFA_LOCK(ifa);
|
|
while ((imm = ia->ia6_memberships.lh_first) != NULL) {
|
|
LIST_REMOVE(imm, i6mm_chain);
|
|
IFA_UNLOCK(ifa);
|
|
in6_leavegroup(imm);
|
|
IFA_LOCK(ifa);
|
|
}
|
|
|
|
/* remove from the routing table */
|
|
if (ia->ia_flags & IFA_ROUTE) {
|
|
IFA_UNLOCK(ifa);
|
|
rt = rtalloc1(SA(&ia->ia_addr), 0, 0);
|
|
if (rt != NULL) {
|
|
(void) rtrequest(RTM_DELETE,
|
|
SA(&ia->ia_addr),
|
|
SA(&ia->ia_addr),
|
|
SA(&ia->ia_prefixmask),
|
|
rt->rt_flags, (struct rtentry **)0);
|
|
rtfree(rt);
|
|
}
|
|
} else {
|
|
IFA_UNLOCK(ifa);
|
|
}
|
|
|
|
/* also remove from the IPv6 address chain(itojun&jinmei) */
|
|
unlinked = 0;
|
|
lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
|
|
TAILQ_FOREACH(nia, &in6_ifaddrhead, ia6_link) {
|
|
if (ia == nia) {
|
|
TAILQ_REMOVE(&in6_ifaddrhead, ia, ia6_link);
|
|
os_atomic_inc(&in6_ifaddrlist_genid, relaxed);
|
|
unlinked = 1;
|
|
break;
|
|
}
|
|
}
|
|
lck_rw_done(&in6_ifaddr_rwlock);
|
|
|
|
/*
|
|
* release another refcnt for the link from in6_ifaddrs.
|
|
* Do this only if it's not already unlinked in the event
|
|
* that we lost the race, since in6_ifaddr_rwlock was
|
|
* momentarily dropped above.
|
|
*/
|
|
if (unlinked) {
|
|
ifa_remref(ifa);
|
|
}
|
|
/* release reference held for this routine */
|
|
ifa_remref(ifa);
|
|
|
|
/*
|
|
* This is suboptimal, but since we dropped ifnet lock above
|
|
* the list might have changed. Repeat the search from the
|
|
* beginning until we find the first eligible IPv6 address.
|
|
*/
|
|
ifnet_lock_exclusive(ifp);
|
|
ifa = TAILQ_FIRST(&ifp->if_addrlist);
|
|
}
|
|
ifnet_lock_done(ifp);
|
|
|
|
/* invalidate route caches */
|
|
routegenid_inet6_update();
|
|
|
|
/*
|
|
* remove neighbor management table. we call it twice just to make
|
|
* sure we nuke everything. maybe we need just one call.
|
|
* XXX: since the first call did not release addresses, some prefixes
|
|
* might remain. We should call nd6_purge() again to release the
|
|
* prefixes after removing all addresses above.
|
|
* (Or can we just delay calling nd6_purge until at this point?)
|
|
*/
|
|
nd6_purge(ifp);
|
|
|
|
/* remove route to link-local allnodes multicast (ff02::1) */
|
|
SOCKADDR_ZERO(&sin6, sizeof(sin6));
|
|
sin6.sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6.sin6_family = AF_INET6;
|
|
sin6.sin6_addr = in6addr_linklocal_allnodes;
|
|
if (in6_embedded_scope) {
|
|
sin6.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
|
|
} else {
|
|
sin6.sin6_scope_id = ifp->if_index;
|
|
}
|
|
rt = rtalloc1(SA(&sin6), 0, 0);
|
|
if (rt != NULL) {
|
|
RT_LOCK(rt);
|
|
if (rt->rt_ifp == ifp) {
|
|
/*
|
|
* Prevent another thread from modifying rt_key,
|
|
* rt_gateway via rt_setgate() after the rt_lock
|
|
* is dropped by marking the route as defunct.
|
|
*/
|
|
rt->rt_flags |= RTF_CONDEMNED;
|
|
RT_UNLOCK(rt);
|
|
(void) rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
|
|
rt_mask(rt), rt->rt_flags, 0);
|
|
} else {
|
|
RT_UNLOCK(rt);
|
|
}
|
|
rtfree(rt);
|
|
}
|
|
}
|
|
|
|
void
|
|
in6_iid_mktmp(struct ifnet *ifp, u_int8_t *retbuf, const u_int8_t *baseid,
|
|
int generate)
|
|
{
|
|
u_int8_t nullbuf[8];
|
|
struct nd_ifinfo *ndi = ND_IFINFO(ifp);
|
|
|
|
VERIFY(ndi != NULL && ndi->initialized);
|
|
lck_mtx_lock(&ndi->lock);
|
|
bzero(nullbuf, sizeof(nullbuf));
|
|
if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) {
|
|
/* we've never created a random ID. Create a new one. */
|
|
generate = 1;
|
|
}
|
|
|
|
if (generate) {
|
|
bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
|
|
|
|
/* in6_generate_tmp_iid will update seedn and buf */
|
|
(void) in6_generate_tmp_iid(ndi->randomseed0, ndi->randomseed1,
|
|
ndi->randomid);
|
|
}
|
|
|
|
bcopy(ndi->randomid, retbuf, 8);
|
|
lck_mtx_unlock(&ndi->lock);
|
|
}
|
|
|
|
void
|
|
in6_tmpaddrtimer(void *arg)
|
|
{
|
|
#pragma unused(arg)
|
|
struct ifnet *ifp = NULL;
|
|
struct nd_ifinfo *ndi = NULL;
|
|
u_int8_t nullbuf[8];
|
|
|
|
timeout(in6_tmpaddrtimer, (caddr_t)0, (ip6_temp_preferred_lifetime -
|
|
ip6_desync_factor - ip6_temp_regen_advance) * hz);
|
|
|
|
bzero(nullbuf, sizeof(nullbuf));
|
|
ifnet_head_lock_shared();
|
|
for (ifp = ifnet_head.tqh_first; ifp;
|
|
ifp = ifp->if_link.tqe_next) {
|
|
ndi = ND_IFINFO(ifp);
|
|
if ((NULL == ndi) || (FALSE == ndi->initialized)) {
|
|
continue;
|
|
}
|
|
lck_mtx_lock(&ndi->lock);
|
|
if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
|
|
/*
|
|
* We've been generating a random ID on this interface.
|
|
* Create a new one.
|
|
*/
|
|
(void) in6_generate_tmp_iid(ndi->randomseed0,
|
|
ndi->randomseed1, ndi->randomid);
|
|
}
|
|
lck_mtx_unlock(&ndi->lock);
|
|
}
|
|
ifnet_head_done();
|
|
}
|