cfa1ca9dfa
packet divert at kernel for IPv6/IPv4 translater daemon This includes queue related patch submitted by jburkhol@home.com. Submitted by: queue related patch from jburkhol@home.com Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
689 lines
17 KiB
C
689 lines
17 KiB
C
/*
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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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* $FreeBSD$
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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/sockio.h>
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#include <sys/kernel.h>
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#include <sys/md5.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 <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 <netinet6/in6.h>
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#include <netinet6/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/in6_ifattach.h>
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#include <netinet6/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/nd6.h>
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#include <net/net_osdep.h>
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static struct in6_addr llsol;
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struct in6_ifstat **in6_ifstat = NULL;
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struct icmp6_ifstat **icmp6_ifstat = NULL;
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size_t in6_ifstatmax = 0;
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size_t icmp6_ifstatmax = 0;
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unsigned long in6_maxmtu = 0;
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int found_first_ifid = 0;
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#define IFID_LEN 8
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static char first_ifid[IFID_LEN];
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static int laddr_to_eui64 __P((u_int8_t *, u_int8_t *, size_t));
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static int gen_rand_eui64 __P((u_int8_t *));
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static int
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laddr_to_eui64(dst, src, len)
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u_int8_t *dst;
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u_int8_t *src;
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size_t len;
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{
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static u_int8_t zero[8];
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bzero(zero, sizeof(zero));
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switch (len) {
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case 6:
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if (bcmp(zero, src, 6) == 0)
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return EINVAL;
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dst[0] = src[0];
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dst[1] = src[1];
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dst[2] = src[2];
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dst[3] = 0xff;
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dst[4] = 0xfe;
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dst[5] = src[3];
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dst[6] = src[4];
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dst[7] = src[5];
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break;
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case 8:
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if (bcmp(zero, src, 8) == 0)
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return EINVAL;
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bcopy(src, dst, len);
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break;
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default:
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return EINVAL;
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}
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return 0;
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}
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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 address should be random, and should not change across reboot.
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*/
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static int
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gen_rand_eui64(dst)
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u_int8_t *dst;
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{
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MD5_CTX ctxt;
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u_int8_t digest[16];
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int hostnamelen = strlen(hostname);
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/* generate 8bytes of pseudo-random value. */
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bzero(&ctxt, sizeof(ctxt));
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MD5Init(&ctxt);
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MD5Update(&ctxt, hostname, hostnamelen);
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MD5Final(digest, &ctxt);
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/* assumes sizeof(digest) > sizeof(first_ifid) */
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bcopy(digest, dst, 8);
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/* make sure to set "u" bit to local, and "g" bit to individual. */
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dst[0] &= 0xfe;
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dst[0] |= 0x02; /* EUI64 "local" */
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return 0;
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}
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/*
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* Find first ifid on list of interfaces.
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* This is assumed that ifp0's interface token (for example, IEEE802 MAC)
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* is globally unique. We may need to have a flag parameter in the future.
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*/
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int
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in6_ifattach_getifid(ifp0)
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struct ifnet *ifp0;
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{
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struct ifnet *ifp;
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struct ifaddr *ifa;
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u_int8_t *addr = NULL;
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int addrlen = 0;
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struct sockaddr_dl *sdl;
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if (found_first_ifid)
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return 0;
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TAILQ_FOREACH(ifp, &ifnet, if_list)
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{
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if (ifp0 != NULL && ifp0 != ifp)
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continue;
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TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
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{
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if (ifa->ifa_addr->sa_family != AF_LINK)
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continue;
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sdl = (struct sockaddr_dl *)ifa->ifa_addr;
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if (sdl == NULL)
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continue;
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if (sdl->sdl_alen == 0)
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continue;
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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_ATM:
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/* IEEE802/EUI64 cases - what others? */
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addr = LLADDR(sdl);
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addrlen = sdl->sdl_alen;
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/*
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* to copy ifid from IEEE802/EUI64 interface,
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* u bit of the source needs to be 0.
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*/
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if ((addr[0] & 0x02) != 0)
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break;
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goto found;
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case IFT_ARCNET:
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/*
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* ARCnet interface token cannot be used as
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* globally unique identifier due to its
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* small bitwidth.
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*/
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break;
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default:
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break;
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}
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}
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}
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#ifdef DEBUG
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printf("in6_ifattach_getifid: failed to get EUI64");
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#endif
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return EADDRNOTAVAIL;
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found:
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if (laddr_to_eui64(first_ifid, addr, addrlen) == 0)
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found_first_ifid = 1;
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if (found_first_ifid) {
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printf("%s: supplying EUI64: "
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"%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
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if_name(ifp),
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first_ifid[0] & 0xff, first_ifid[1] & 0xff,
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first_ifid[2] & 0xff, first_ifid[3] & 0xff,
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first_ifid[4] & 0xff, first_ifid[5] & 0xff,
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first_ifid[6] & 0xff, first_ifid[7] & 0xff);
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/* invert u bit to convert EUI64 to RFC2373 interface ID. */
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first_ifid[0] ^= 0x02;
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return 0;
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} else {
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#ifdef DEBUG
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printf("in6_ifattach_getifid: failed to get EUI64");
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#endif
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return EADDRNOTAVAIL;
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}
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}
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/*
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* add link-local address to *pseudo* p2p interfaces.
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* get called when the first MAC address is made available in in6_ifattach().
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*
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* XXX I start considering this loop as a bad idea. (itojun)
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*/
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void
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in6_ifattach_p2p()
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{
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struct ifnet *ifp;
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/* prevent infinite loop. just in case. */
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if (found_first_ifid == 0)
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return;
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TAILQ_FOREACH(ifp, &ifnet, if_list)
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{
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switch (ifp->if_type) {
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case IFT_GIF:
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/* pseudo interfaces - safe to initialize here */
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in6_ifattach(ifp, IN6_IFT_P2P, 0, 0);
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break;
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#ifdef IFT_DUMMY
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case IFT_DUMMY:
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#endif
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case IFT_FAITH:
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/* this mistakingly becomes IFF_UP */
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break;
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case IFT_SLIP:
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/* IPv6 is not supported */
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break;
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case IFT_PPP:
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/* this is not a pseudo interface, skip it */
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break;
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default:
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break;
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}
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}
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}
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void
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in6_ifattach(ifp, type, laddr, noloop)
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struct ifnet *ifp;
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u_int type;
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caddr_t laddr;
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/* size_t laddrlen; */
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int noloop;
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{
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static size_t if_indexlim = 8;
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struct sockaddr_in6 mltaddr;
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struct sockaddr_in6 mltmask;
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struct sockaddr_in6 gate;
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struct sockaddr_in6 mask;
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struct in6_ifaddr *ia, *ib, *oia;
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struct ifaddr *ifa;
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int rtflag = 0;
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if (type == IN6_IFT_P2P && found_first_ifid == 0) {
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printf("%s: no ifid available for IPv6 link-local address\n",
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if_name(ifp));
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/* last resort */
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if (gen_rand_eui64(first_ifid) == 0) {
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printf("%s: using random value as EUI64: "
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"%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
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if_name(ifp),
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first_ifid[0] & 0xff, first_ifid[1] & 0xff,
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first_ifid[2] & 0xff, first_ifid[3] & 0xff,
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first_ifid[4] & 0xff, first_ifid[5] & 0xff,
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first_ifid[6] & 0xff, first_ifid[7] & 0xff);
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/*
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* invert u bit to convert EUI64 to RFC2373 interface
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* ID.
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*/
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first_ifid[0] ^= 0x02;
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found_first_ifid = 1;
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}
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}
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if ((ifp->if_flags & IFF_MULTICAST) == 0) {
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printf("%s: not multicast capable, IPv6 not enabled\n",
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if_name(ifp));
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return;
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}
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/*
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* We have some arrays that should be indexed by if_index.
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* since if_index will grow dynamically, they should grow too.
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* struct in6_ifstat **in6_ifstat
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* struct icmp6_ifstat **icmp6_ifstat
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*/
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if (in6_ifstat == NULL || icmp6_ifstat == NULL
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|| if_index >= if_indexlim) {
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size_t n;
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caddr_t q;
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size_t olim;
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olim = if_indexlim;
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while (if_index >= if_indexlim)
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if_indexlim <<= 1;
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/* grow in6_ifstat */
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n = if_indexlim * sizeof(struct in6_ifstat *);
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q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK);
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bzero(q, n);
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if (in6_ifstat) {
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bcopy((caddr_t)in6_ifstat, q,
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olim * sizeof(struct in6_ifstat *));
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free((caddr_t)in6_ifstat, M_IFADDR);
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}
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in6_ifstat = (struct in6_ifstat **)q;
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in6_ifstatmax = if_indexlim;
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/* grow icmp6_ifstat */
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n = if_indexlim * sizeof(struct icmp6_ifstat *);
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q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK);
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bzero(q, n);
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if (icmp6_ifstat) {
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bcopy((caddr_t)icmp6_ifstat, q,
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olim * sizeof(struct icmp6_ifstat *));
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free((caddr_t)icmp6_ifstat, M_IFADDR);
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}
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icmp6_ifstat = (struct icmp6_ifstat **)q;
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icmp6_ifstatmax = if_indexlim;
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}
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/*
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* To prevent to assign link-local address to PnP network
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* cards multiple times.
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* This is lengthy for P2P and LOOP but works.
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*/
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ifa = TAILQ_FIRST(&ifp->if_addrlist);
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if (ifa != NULL) {
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for ( ; ifa; ifa = TAILQ_NEXT(ifa, ifa_list)) {
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if (ifa->ifa_addr->sa_family != AF_INET6)
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continue;
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if (IN6_IS_ADDR_LINKLOCAL(&satosin6(ifa->ifa_addr)->sin6_addr))
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return;
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}
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} else {
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TAILQ_INIT(&ifp->if_addrlist);
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}
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/*
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* link-local address
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*/
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ia = (struct in6_ifaddr *)malloc(sizeof(*ia), M_IFADDR, M_WAITOK);
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bzero((caddr_t)ia, sizeof(*ia));
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ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
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ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
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ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
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ia->ia_ifp = ifp;
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TAILQ_INSERT_TAIL(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list);
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/*
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* Also link into the IPv6 address chain beginning with in6_ifaddr.
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* kazu opposed it, but itojun & jinmei wanted.
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*/
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if ((oia = in6_ifaddr) != NULL) {
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for (; oia->ia_next; oia = oia->ia_next)
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continue;
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oia->ia_next = ia;
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} else
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in6_ifaddr = ia;
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ia->ia_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
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ia->ia_prefixmask.sin6_family = AF_INET6;
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ia->ia_prefixmask.sin6_addr = in6mask64;
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bzero(&ia->ia_addr, sizeof(struct sockaddr_in6));
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ia->ia_addr.sin6_len = sizeof(struct sockaddr_in6);
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ia->ia_addr.sin6_family = AF_INET6;
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ia->ia_addr.sin6_addr.s6_addr16[0] = htons(0xfe80);
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ia->ia_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
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ia->ia_addr.sin6_addr.s6_addr32[1] = 0;
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switch (type) {
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case IN6_IFT_LOOP:
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ia->ia_addr.sin6_addr.s6_addr32[2] = 0;
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ia->ia_addr.sin6_addr.s6_addr32[3] = htonl(1);
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break;
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case IN6_IFT_802:
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ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
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ia->ia_ifa.ifa_flags |= RTF_CLONING;
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rtflag = RTF_CLONING;
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/* fall through */
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case IN6_IFT_P2P802:
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if (laddr == NULL)
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break;
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/* XXX use laddrlen */
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if (laddr_to_eui64(&ia->ia_addr.sin6_addr.s6_addr8[8],
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laddr, 6) != 0) {
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break;
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}
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/* invert u bit to convert EUI64 to RFC2373 interface ID. */
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ia->ia_addr.sin6_addr.s6_addr8[8] ^= 0x02;
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if (found_first_ifid == 0) {
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if (in6_ifattach_getifid(ifp) == 0)
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in6_ifattach_p2p();
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}
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break;
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case IN6_IFT_P2P:
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bcopy((caddr_t)first_ifid,
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(caddr_t)&ia->ia_addr.sin6_addr.s6_addr8[8],
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IFID_LEN);
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break;
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case IN6_IFT_ARCNET:
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ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
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ia->ia_ifa.ifa_flags |= RTF_CLONING;
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rtflag = RTF_CLONING;
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if (laddr == NULL)
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break;
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/* make non-global IF id out of link-level address */
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bzero(&ia->ia_addr.sin6_addr.s6_addr8[8], 7);
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ia->ia_addr.sin6_addr.s6_addr8[15] = *laddr;
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}
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ia->ia_ifa.ifa_metric = ifp->if_metric;
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if (ifp->if_ioctl != NULL) {
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int s;
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int error;
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/*
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* give the interface a chance to initialize, in case this
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* is the first address to be added.
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*/
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s = splimp();
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error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
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splx(s);
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if (error) {
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switch (error) {
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case EAFNOSUPPORT:
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printf("%s: IPv6 not supported\n",
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if_name(ifp));
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break;
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default:
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printf("%s: SIOCSIFADDR error %d\n",
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if_name(ifp), error);
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break;
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}
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/* undo changes */
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TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list);
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if (oia)
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oia->ia_next = ia->ia_next;
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else
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in6_ifaddr = ia->ia_next;
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free(ia, M_IFADDR);
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return;
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}
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}
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/* add route to the interface. */
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rtrequest(RTM_ADD,
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(struct sockaddr *)&ia->ia_addr,
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(struct sockaddr *)&ia->ia_addr,
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(struct sockaddr *)&ia->ia_prefixmask,
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RTF_UP|rtflag,
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(struct rtentry **)0);
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ia->ia_flags |= IFA_ROUTE;
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if (type == IN6_IFT_P2P || type == IN6_IFT_P2P802) {
|
|
/*
|
|
* route local address to loopback
|
|
*/
|
|
bzero(&gate, sizeof(gate));
|
|
gate.sin6_len = sizeof(struct sockaddr_in6);
|
|
gate.sin6_family = AF_INET6;
|
|
gate.sin6_addr = in6addr_loopback;
|
|
bzero(&mask, sizeof(mask));
|
|
mask.sin6_len = sizeof(struct sockaddr_in6);
|
|
mask.sin6_family = AF_INET6;
|
|
mask.sin6_addr = in6mask64;
|
|
rtrequest(RTM_ADD,
|
|
(struct sockaddr *)&ia->ia_addr,
|
|
(struct sockaddr *)&gate,
|
|
(struct sockaddr *)&mask,
|
|
RTF_UP|RTF_HOST,
|
|
(struct rtentry **)0);
|
|
}
|
|
|
|
/*
|
|
* loopback address
|
|
*/
|
|
ib = (struct in6_ifaddr *)NULL;
|
|
if (type == IN6_IFT_LOOP) {
|
|
ib = (struct in6_ifaddr *)
|
|
malloc(sizeof(*ib), M_IFADDR, M_WAITOK);
|
|
bzero((caddr_t)ib, sizeof(*ib));
|
|
ib->ia_ifa.ifa_addr = (struct sockaddr *)&ib->ia_addr;
|
|
ib->ia_ifa.ifa_dstaddr = (struct sockaddr *)&ib->ia_dstaddr;
|
|
ib->ia_ifa.ifa_netmask = (struct sockaddr *)&ib->ia_prefixmask;
|
|
ib->ia_ifp = ifp;
|
|
|
|
ia->ia_next = ib;
|
|
TAILQ_INSERT_TAIL(&ifp->if_addrlist, (struct ifaddr *)ib,
|
|
ifa_list);
|
|
|
|
ib->ia_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
|
|
ib->ia_prefixmask.sin6_family = AF_INET6;
|
|
ib->ia_prefixmask.sin6_addr = in6mask128;
|
|
ib->ia_addr.sin6_len = sizeof(struct sockaddr_in6);
|
|
ib->ia_addr.sin6_family = AF_INET6;
|
|
ib->ia_addr.sin6_addr = in6addr_loopback;
|
|
ib->ia_ifa.ifa_metric = ifp->if_metric;
|
|
|
|
rtrequest(RTM_ADD,
|
|
(struct sockaddr *)&ib->ia_addr,
|
|
(struct sockaddr *)&ib->ia_addr,
|
|
(struct sockaddr *)&ib->ia_prefixmask,
|
|
RTF_UP|RTF_HOST,
|
|
(struct rtentry **)0);
|
|
|
|
ib->ia_flags |= IFA_ROUTE;
|
|
}
|
|
|
|
/*
|
|
* join multicast
|
|
*/
|
|
if (ifp->if_flags & IFF_MULTICAST) {
|
|
int error; /* not used */
|
|
|
|
bzero(&mltmask, sizeof(mltmask));
|
|
mltmask.sin6_len = sizeof(struct sockaddr_in6);
|
|
mltmask.sin6_family = AF_INET6;
|
|
mltmask.sin6_addr = in6mask32;
|
|
|
|
/*
|
|
* join link-local all-nodes address
|
|
*/
|
|
bzero(&mltaddr, sizeof(mltaddr));
|
|
mltaddr.sin6_len = sizeof(struct sockaddr_in6);
|
|
mltaddr.sin6_family = AF_INET6;
|
|
mltaddr.sin6_addr = in6addr_linklocal_allnodes;
|
|
mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
|
|
rtrequest(RTM_ADD,
|
|
(struct sockaddr *)&mltaddr,
|
|
(struct sockaddr *)&ia->ia_addr,
|
|
(struct sockaddr *)&mltmask,
|
|
RTF_UP|RTF_CLONING, /* xxx */
|
|
(struct rtentry **)0);
|
|
(void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
|
|
|
|
if (type == IN6_IFT_LOOP) {
|
|
/*
|
|
* join node-local all-nodes address
|
|
*/
|
|
mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
|
|
rtrequest(RTM_ADD,
|
|
(struct sockaddr *)&mltaddr,
|
|
(struct sockaddr *)&ib->ia_addr,
|
|
(struct sockaddr *)&mltmask,
|
|
RTF_UP,
|
|
(struct rtentry **)0);
|
|
(void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
|
|
} else {
|
|
/*
|
|
* join solicited multicast address
|
|
*/
|
|
bzero(&llsol, sizeof(llsol));
|
|
llsol.s6_addr16[0] = htons(0xff02);
|
|
llsol.s6_addr16[1] = htons(ifp->if_index);
|
|
llsol.s6_addr32[1] = 0;
|
|
llsol.s6_addr32[2] = htonl(1);
|
|
llsol.s6_addr32[3] = ia->ia_addr.sin6_addr.s6_addr32[3];
|
|
llsol.s6_addr8[12] = 0xff;
|
|
(void)in6_addmulti(&llsol, ifp, &error);
|
|
}
|
|
}
|
|
|
|
/* update dynamically. */
|
|
if (in6_maxmtu < ifp->if_mtu)
|
|
in6_maxmtu = ifp->if_mtu;
|
|
|
|
if (in6_ifstat[ifp->if_index] == NULL) {
|
|
in6_ifstat[ifp->if_index] = (struct in6_ifstat *)
|
|
malloc(sizeof(struct in6_ifstat), M_IFADDR, M_WAITOK);
|
|
bzero(in6_ifstat[ifp->if_index], sizeof(struct in6_ifstat));
|
|
}
|
|
if (icmp6_ifstat[ifp->if_index] == NULL) {
|
|
icmp6_ifstat[ifp->if_index] = (struct icmp6_ifstat *)
|
|
malloc(sizeof(struct icmp6_ifstat), M_IFADDR, M_WAITOK);
|
|
bzero(icmp6_ifstat[ifp->if_index], sizeof(struct icmp6_ifstat));
|
|
}
|
|
|
|
/* initialize NDP variables */
|
|
nd6_ifattach(ifp);
|
|
|
|
/* mark the address TENTATIVE, if needed. */
|
|
switch (ifp->if_type) {
|
|
case IFT_ARCNET:
|
|
case IFT_ETHER:
|
|
case IFT_FDDI:
|
|
ia->ia6_flags |= IN6_IFF_TENTATIVE;
|
|
/* nd6_dad_start() will be called in in6_if_up */
|
|
break;
|
|
#ifdef IFT_DUMMY
|
|
case IFT_DUMMY:
|
|
#endif
|
|
case IFT_GIF: /*XXX*/
|
|
case IFT_LOOP:
|
|
case IFT_FAITH:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
void
|
|
in6_ifdetach(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
struct in6_ifaddr *ia, *oia;
|
|
struct ifaddr *ifa;
|
|
struct rtentry *rt;
|
|
short rtflags;
|
|
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
|
|
{
|
|
if (ifa->ifa_addr->sa_family != AF_INET6
|
|
|| !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) {
|
|
continue;
|
|
}
|
|
|
|
ia = (struct in6_ifaddr *)ifa;
|
|
|
|
/* remove from the routing table */
|
|
if ((ia->ia_flags & IFA_ROUTE)
|
|
&& (rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0, 0UL))) {
|
|
rtflags = rt->rt_flags;
|
|
rtfree(rt);
|
|
rtrequest(RTM_DELETE,
|
|
(struct sockaddr *)&ia->ia_addr,
|
|
(struct sockaddr *)&ia->ia_addr,
|
|
(struct sockaddr *)&ia->ia_prefixmask,
|
|
rtflags, (struct rtentry **)0);
|
|
}
|
|
|
|
/* remove from the linked list */
|
|
TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list);
|
|
|
|
/* also remove from the IPv6 address chain(itojun&jinmei) */
|
|
oia = ia;
|
|
if (oia == (ia = in6_ifaddr))
|
|
in6_ifaddr = ia->ia_next;
|
|
else {
|
|
while (ia->ia_next && (ia->ia_next != oia))
|
|
ia = ia->ia_next;
|
|
if (ia->ia_next)
|
|
ia->ia_next = oia->ia_next;
|
|
#ifdef DEBUG
|
|
else
|
|
printf("%s: didn't unlink in6ifaddr from "
|
|
"list\n", if_name(ifp));
|
|
#endif
|
|
}
|
|
|
|
free(ia, M_IFADDR);
|
|
}
|
|
}
|