9b74747370
hope I made no mistake (the kernel works fine but I need a regress test) Suggested by: thorpej
1802 lines
45 KiB
C
1802 lines
45 KiB
C
/* $NetBSD: in6.c,v 1.4 1999/07/04 02:01:15 itojun Exp $ */
|
|
|
|
/*
|
|
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the project nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1982, 1986, 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)in.c 8.2 (Berkeley) 11/15/93
|
|
*/
|
|
|
|
#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__)
|
|
#include "opt_inet.h"
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
#if !defined(__FreeBSD__) && __FreeBSD__ < 3
|
|
#include <sys/ioctl.h>
|
|
#endif
|
|
#include <sys/errno.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/systm.h>
|
|
#ifdef __NetBSD__
|
|
#include <sys/proc.h>
|
|
#endif
|
|
#include <sys/time.h>
|
|
#include <sys/kernel.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_types.h>
|
|
#include <net/route.h>
|
|
#include "gif.h"
|
|
#if NGIF > 0
|
|
#include <net/if_gif.h>
|
|
#endif
|
|
#include <net/if_dl.h>
|
|
|
|
#include <net/if.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_var.h>
|
|
#ifdef __NetBSD__
|
|
#include <net/if_ether.h>
|
|
#else
|
|
#include <netinet/if_ether.h>
|
|
#endif
|
|
|
|
#include <netinet6/in6_systm.h>
|
|
#include <netinet6/nd6.h>
|
|
#include <netinet6/ip6.h>
|
|
#include <netinet6/mld6_var.h>
|
|
#include <netinet6/ip6_mroute.h>
|
|
#include <netinet6/in6_ifattach.h>
|
|
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
|
MALLOC_DEFINE(M_IPMADDR, "in6_multi", "internet multicast address");
|
|
#else
|
|
#define time_second time.tv_sec
|
|
#endif
|
|
|
|
/*
|
|
* Definitions of some costant IP6 addresses.
|
|
*/
|
|
const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
|
|
const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
|
|
const struct in6_addr in6addr_nodelocal_allnodes =
|
|
IN6ADDR_NODELOCAL_ALLNODES_INIT;
|
|
const struct in6_addr in6addr_linklocal_allnodes =
|
|
IN6ADDR_LINKLOCAL_ALLNODES_INIT;
|
|
const struct in6_addr in6addr_linklocal_allrouters =
|
|
IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
|
|
|
|
const struct in6_addr in6mask0 = IN6MASK0;
|
|
const struct in6_addr in6mask32 = IN6MASK32;
|
|
const struct in6_addr in6mask64 = IN6MASK64;
|
|
const struct in6_addr in6mask96 = IN6MASK96;
|
|
const struct in6_addr in6mask128 = IN6MASK128;
|
|
|
|
static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t,
|
|
struct ifnet *, struct proc *));
|
|
|
|
/*
|
|
* This structure is used to keep track of in6_multi chains which belong to
|
|
* deleted interface addresses.
|
|
*/
|
|
static LIST_HEAD(, multi6_kludge) in6_mk; /* XXX BSS initialization */
|
|
|
|
struct multi6_kludge {
|
|
LIST_ENTRY(multi6_kludge) mk_entry;
|
|
struct ifnet *mk_ifp;
|
|
struct in6_multihead mk_head;
|
|
};
|
|
|
|
/*
|
|
* Determine whether an IP6 address is in a reserved set of addresses
|
|
* that may not be forwarded, or whether datagrams to that destination
|
|
* may be forwarded.
|
|
*/
|
|
int
|
|
in6_canforward(src, dst)
|
|
struct in6_addr *src, *dst;
|
|
{
|
|
if (IN6_IS_ADDR_LINKLOCAL(src) ||
|
|
IN6_IS_ADDR_LINKLOCAL(dst) ||
|
|
IN6_IS_ADDR_MULTICAST(dst))
|
|
return(0);
|
|
return(1);
|
|
}
|
|
|
|
/*
|
|
* Check if the loopback entry will be automatically generated.
|
|
* if 0 returned, will not be automatically generated.
|
|
* if 1 returned, will be automatically generated.
|
|
*/
|
|
static int
|
|
in6_is_ifloop_auto(struct ifaddr *ifa)
|
|
{
|
|
#define SIN6(s) ((struct sockaddr_in6 *)s)
|
|
/*
|
|
* If RTF_CLONING is unset, or (IFF_LOOPBACK | IFF_POINTOPOINT),
|
|
* or netmask is all0 or all1, then cloning will not happen,
|
|
* then we can't rely on its loopback entry generation.
|
|
*/
|
|
if ((ifa->ifa_flags & RTF_CLONING) == 0 ||
|
|
(ifa->ifa_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) ||
|
|
(SIN6(ifa->ifa_netmask)->sin6_len == sizeof(struct sockaddr_in6)
|
|
&&
|
|
IN6_ARE_ADDR_EQUAL(&SIN6(ifa->ifa_netmask)->sin6_addr,
|
|
&in6mask128)) ||
|
|
((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_len == 0)
|
|
return 0;
|
|
else
|
|
return 1;
|
|
#undef SIN6
|
|
}
|
|
|
|
/*
|
|
* Subroutine for in6_ifaddloop() and in6_ifremloop().
|
|
* This routine does actual work.
|
|
*/
|
|
static void
|
|
in6_ifloop_request(int cmd, struct ifaddr *ifa)
|
|
{
|
|
struct sockaddr_in6 lo_sa;
|
|
struct sockaddr_in6 all1_sa;
|
|
struct rtentry *nrt = NULL;
|
|
|
|
bzero(&lo_sa, sizeof(lo_sa));
|
|
bzero(&all1_sa, sizeof(all1_sa));
|
|
lo_sa.sin6_family = AF_INET6;
|
|
lo_sa.sin6_len = sizeof(struct sockaddr_in6);
|
|
all1_sa = lo_sa;
|
|
lo_sa.sin6_addr = in6addr_loopback;
|
|
all1_sa.sin6_addr = in6mask128;
|
|
|
|
/* So we add or remove static loopback entry, here. */
|
|
rtrequest(cmd, ifa->ifa_addr,
|
|
(struct sockaddr *)&lo_sa,
|
|
(struct sockaddr *)&all1_sa,
|
|
RTF_UP|RTF_HOST, &nrt);
|
|
|
|
/*
|
|
* Make sure rt_ifa be equal to IFA, the second argument of the
|
|
* function.
|
|
* We need this because when we refer rt_ifa->ia6_flags in ip6_input,
|
|
* we assume that the rt_ifa points to the address instead of the
|
|
* loopback address.
|
|
*/
|
|
if (cmd == RTM_ADD && nrt && ifa != nrt->rt_ifa) {
|
|
nrt->rt_ifa->ifa_refcnt--;
|
|
ifa->ifa_refcnt++;
|
|
nrt->rt_ifa = ifa;
|
|
}
|
|
if (nrt)
|
|
nrt->rt_refcnt--;
|
|
}
|
|
|
|
/*
|
|
* Add ownaddr as loopback rtentry, if necessary(ex. on p2p link).
|
|
* Because, KAME needs loopback rtentry for ownaddr check in
|
|
* ip6_input().
|
|
*/
|
|
static void
|
|
in6_ifaddloop(struct ifaddr *ifa)
|
|
{
|
|
if (!in6_is_ifloop_auto(ifa)) {
|
|
struct rtentry *rt;
|
|
|
|
/* If there is no loopback entry, allocate one. */
|
|
rt = rtalloc1(ifa->ifa_addr, 0
|
|
#ifdef __FreeBSD__
|
|
, 0
|
|
#endif /* __FreeBSD__ */
|
|
);
|
|
if (rt == 0 || (rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0)
|
|
in6_ifloop_request(RTM_ADD, ifa);
|
|
if (rt)
|
|
rt->rt_refcnt--;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Remove loopback rtentry of ownaddr generated by in6_ifaddloop(),
|
|
* if it exists.
|
|
*/
|
|
static void
|
|
in6_ifremloop(struct ifaddr *ifa)
|
|
{
|
|
if (!in6_is_ifloop_auto(ifa)) {
|
|
struct in6_ifaddr *ia;
|
|
int ia_count = 0;
|
|
|
|
/* If only one ifa for the loopback entry, delete it. */
|
|
for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
|
|
if (IN6_ARE_ADDR_EQUAL(&IFA_IN6(ifa),
|
|
&ia->ia_addr.sin6_addr)) {
|
|
ia_count++;
|
|
if (ia_count > 1)
|
|
break;
|
|
}
|
|
}
|
|
if (ia_count == 1)
|
|
in6_ifloop_request(RTM_DELETE, ifa);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Subroutine for in6_ifaddproxy() and in6_ifremproxy().
|
|
* This routine does actual work.
|
|
* call in6_addmulti() when cmd == 1.
|
|
* call in6_delmulti() when cmd == 2.
|
|
*/
|
|
static int
|
|
in6_ifproxy_request(int cmd, struct in6_ifaddr *ia)
|
|
{
|
|
int error = 0;
|
|
|
|
/*
|
|
* If we have an IPv6 dstaddr on adding p2p interface,
|
|
* join dstaddr's solicited multicast on necessary interface.
|
|
*/
|
|
if ((ia->ia_ifp->if_flags & IFF_POINTOPOINT) &&
|
|
ia->ia_dstaddr.sin6_family == AF_INET6 &&
|
|
!IN6_IS_ADDR_LINKLOCAL(&ia->ia_dstaddr.sin6_addr)) {
|
|
struct in6_ifaddr *ia_lan;
|
|
|
|
/*
|
|
* TODO: Join only on some specified interfaces by some
|
|
* configuration.
|
|
* Unsolicited Neighbor Advertisements will be also necessary.
|
|
*
|
|
* Now, join on interfaces which meets following.
|
|
* -IFF_BROADCAST and IFF_MULTICAST
|
|
* (NBMA is out of scope)
|
|
* -the prefix value is same as p2p dstaddr
|
|
*/
|
|
for (ia_lan = in6_ifaddr; ia_lan; ia_lan = ia_lan->ia_next) {
|
|
struct in6_addr llsol;
|
|
|
|
if ((ia_lan->ia_ifp->if_flags &
|
|
(IFF_BROADCAST|IFF_MULTICAST)) !=
|
|
(IFF_BROADCAST|IFF_MULTICAST))
|
|
continue;
|
|
if (!IN6_ARE_MASKED_ADDR_EQUAL(IA6_IN6(ia),
|
|
IA6_IN6(ia_lan),
|
|
IA6_MASKIN6(ia_lan)))
|
|
continue;
|
|
if (ia_lan->ia_ifp == ia->ia_ifp)
|
|
continue;
|
|
|
|
/* init llsol */
|
|
bzero(&llsol, sizeof(struct in6_addr));
|
|
llsol.s6_addr16[0] = htons(0xff02);
|
|
llsol.s6_addr16[1] = htons(ia_lan->ia_ifp->if_index);
|
|
llsol.s6_addr32[1] = 0;
|
|
llsol.s6_addr32[2] = htonl(1);
|
|
llsol.s6_addr32[3] =
|
|
ia->ia_dstaddr.sin6_addr.s6_addr32[3];
|
|
llsol.s6_addr8[12] = 0xff;
|
|
|
|
if (cmd == 1)
|
|
(void)in6_addmulti(&llsol,
|
|
ia_lan->ia_ifp,
|
|
&error);
|
|
else if (cmd == 2) {
|
|
struct in6_multi *in6m;
|
|
|
|
IN6_LOOKUP_MULTI(llsol,
|
|
ia_lan->ia_ifp,
|
|
in6m);
|
|
if (in6m)
|
|
in6_delmulti(in6m);
|
|
}
|
|
}
|
|
}
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
in6_ifaddproxy(struct in6_ifaddr *ia)
|
|
{
|
|
return(in6_ifproxy_request(1, ia));
|
|
}
|
|
|
|
static void
|
|
in6_ifremproxy(struct in6_ifaddr *ia)
|
|
{
|
|
in6_ifproxy_request(2, ia);
|
|
}
|
|
|
|
int
|
|
in6_mask2len(mask)
|
|
struct in6_addr *mask;
|
|
{
|
|
int x, y;
|
|
|
|
for (x = 0; x < sizeof(*mask); x++) {
|
|
if (mask->s6_addr8[x] != 0xff)
|
|
break;
|
|
}
|
|
y = 0;
|
|
if (x < sizeof(*mask)) {
|
|
for (y = 0; y < 8; y++) {
|
|
if ((mask->s6_addr8[x] & (0x80 >> y)) == 0)
|
|
break;
|
|
}
|
|
}
|
|
return x * 8 + y;
|
|
}
|
|
|
|
void
|
|
in6_len2mask(mask, len)
|
|
struct in6_addr *mask;
|
|
int len;
|
|
{
|
|
int i;
|
|
|
|
bzero(mask, sizeof(*mask));
|
|
for (i = 0; i < len / 8; i++)
|
|
mask->s6_addr8[i] = 0xff;
|
|
if (len % 8)
|
|
mask->s6_addr8[i] = (0xff00 >> (len % 8)) & 0xff;
|
|
}
|
|
|
|
int in6_interfaces; /* number of external internet interfaces */
|
|
|
|
#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
|
|
#define ia62ifa(ia6) ((struct ifaddr *)(ia6))
|
|
|
|
int
|
|
in6_control(so, cmd, data, ifp, p)
|
|
struct socket *so;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
struct ifnet *ifp;
|
|
struct proc *p;
|
|
{
|
|
struct in6_ifreq *ifr = (struct in6_ifreq *)data;
|
|
struct in6_ifaddr *ia, *oia;
|
|
struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
|
|
struct sockaddr_in6 oldaddr, net;
|
|
int error = 0, hostIsNew, prefixIsNew;
|
|
|
|
/*
|
|
* xxx should prevent processes for link-local addresses?
|
|
*/
|
|
#if NGIF > 0
|
|
if (ifp && ifp->if_type == IFT_GIF) {
|
|
switch (cmd) {
|
|
case SIOCSIFPHYADDR_IN6:
|
|
if (p == 0 || suser(p->p_ucred, &p->p_acflag))
|
|
return(EPERM);
|
|
/*fall through*/
|
|
case SIOCGIFPSRCADDR_IN6:
|
|
case SIOCGIFPDSTADDR_IN6:
|
|
return gif_ioctl(ifp, cmd, data);
|
|
}
|
|
}
|
|
#endif
|
|
switch (cmd) {
|
|
case SIOCGETSGCNT_IN6:
|
|
case SIOCGETMIFCNT_IN6:
|
|
return (mrt6_ioctl(cmd, data));
|
|
}
|
|
|
|
if (ifp == 0)
|
|
return(EOPNOTSUPP);
|
|
|
|
switch (cmd) {
|
|
case SIOCSNDFLUSH_IN6:
|
|
case SIOCSPFXFLUSH_IN6:
|
|
case SIOCSRTRFLUSH_IN6:
|
|
if (p == 0 || suser(p->p_ucred, &p->p_acflag))
|
|
return(EPERM);
|
|
/*fall through*/
|
|
case SIOCGIFINFO_IN6:
|
|
case SIOCGDRLST_IN6:
|
|
case SIOCGPRLST_IN6:
|
|
case SIOCGNBRINFO_IN6:
|
|
return(nd6_ioctl(cmd, data, ifp));
|
|
}
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFPREFIX_IN6:
|
|
case SIOCDIFPREFIX_IN6:
|
|
case SIOCAIFPREFIX_IN6:
|
|
case SIOCCIFPREFIX_IN6:
|
|
case SIOCSGIFPREFIX_IN6:
|
|
if (p == 0 || suser(p->p_ucred, &p->p_acflag))
|
|
return(EPERM);
|
|
/*fall through*/
|
|
case SIOCGIFPREFIX_IN6:
|
|
return(in6_prefix_ioctl(cmd, data, ifp));
|
|
}
|
|
|
|
switch (cmd) {
|
|
case SIOCALIFADDR:
|
|
case SIOCDLIFADDR:
|
|
if (p == 0 || suser(p->p_ucred, &p->p_acflag))
|
|
return(EPERM);
|
|
/*fall through*/
|
|
case SIOCGLIFADDR:
|
|
return in6_lifaddr_ioctl(so, cmd, data, ifp, p);
|
|
}
|
|
|
|
/*
|
|
* Find address for this interface, if it exists.
|
|
*/
|
|
{
|
|
struct in6_addr *addr = &ifra->ifra_addr.sin6_addr;
|
|
if (IN6_IS_ADDR_LINKLOCAL(addr)) {
|
|
if (addr->s6_addr16[1] == 0) {
|
|
/* interface ID is not embedded by the user */
|
|
addr->s6_addr16[1] = htons(ifp->if_index);
|
|
}
|
|
else
|
|
if (addr->s6_addr16[1] != htons(ifp->if_index))
|
|
return(EINVAL); /* ifid is contradict */
|
|
}
|
|
}
|
|
#if 0
|
|
if (ifra->ifra_addr.sin6_family == AF_INET6) {
|
|
ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
|
|
}
|
|
#else
|
|
ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
|
|
#endif
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCDIFADDR_IN6:
|
|
if (ia == 0)
|
|
return(EADDRNOTAVAIL);
|
|
/* FALLTHROUGH */
|
|
case SIOCAIFADDR_IN6:
|
|
case SIOCSIFADDR_IN6:
|
|
case SIOCSIFNETMASK_IN6:
|
|
case SIOCSIFDSTADDR_IN6:
|
|
if (p == 0 || suser(p->p_ucred, &p->p_acflag))
|
|
return(EPERM);
|
|
if (ia == 0) {
|
|
ia = (struct in6_ifaddr *)
|
|
malloc(sizeof(*ia), M_IFADDR, M_WAITOK);
|
|
if (ia == NULL)
|
|
return (ENOBUFS);
|
|
bzero((caddr_t)ia, sizeof(*ia));
|
|
ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
|
|
ia->ia_ifa.ifa_dstaddr
|
|
= (struct sockaddr *)&ia->ia_dstaddr;
|
|
ia->ia_ifa.ifa_netmask
|
|
= (struct sockaddr *)&ia->ia_prefixmask;
|
|
|
|
ia->ia_ifp = ifp;
|
|
if ((oia = in6_ifaddr) != NULL) {
|
|
for ( ; oia->ia_next; oia = oia->ia_next)
|
|
continue;
|
|
oia->ia_next = ia;
|
|
} else
|
|
in6_ifaddr = ia;
|
|
#if 0 /* this search seems to be meaningless */
|
|
if ((ifa = ifp->if_addrlist.tqh_first) != NULL) {
|
|
for ( ; ifa->ifa_list.tqe_next; ifa = ifa->ifa_list.tqe_next)
|
|
continue;
|
|
}
|
|
#endif
|
|
TAILQ_INSERT_TAIL(&ifp->if_addrlist,
|
|
(struct ifaddr *)ia, ifa_list);
|
|
if ((ifp->if_flags & IFF_LOOPBACK) == 0)
|
|
in6_interfaces++; /*XXX*/
|
|
}
|
|
|
|
if (cmd == SIOCAIFADDR_IN6) {
|
|
/* sanity for overflow - beware unsigned */
|
|
struct in6_addrlifetime *lt;
|
|
lt = &ifra->ifra_lifetime;
|
|
if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
|
|
&& lt->ia6t_vltime + time_second < time_second) {
|
|
return EINVAL;
|
|
}
|
|
if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
|
|
&& lt->ia6t_pltime + time_second < time_second) {
|
|
return EINVAL;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SIOCGIFADDR_IN6:
|
|
/* This interface is basically deprecated. use SIOCGIFCONF. */
|
|
/* fall through */
|
|
case SIOCGIFAFLAG_IN6:
|
|
case SIOCGIFNETMASK_IN6:
|
|
case SIOCGIFDSTADDR_IN6:
|
|
/* must think again about its semantics */
|
|
if (ia == 0)
|
|
return(EADDRNOTAVAIL);
|
|
break;
|
|
case SIOCSIFALIFETIME_IN6:
|
|
{
|
|
struct in6_addrlifetime *lt;
|
|
|
|
if (p == 0 || suser(p->p_ucred, &p->p_acflag))
|
|
return(EPERM);
|
|
if (ia == 0)
|
|
return(EADDRNOTAVAIL);
|
|
/* sanity for overflow - beware unsigned */
|
|
lt = &ifr->ifr_ifru.ifru_lifetime;
|
|
if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
|
|
&& lt->ia6t_vltime + time_second < time_second) {
|
|
return EINVAL;
|
|
}
|
|
if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
|
|
&& lt->ia6t_pltime + time_second < time_second) {
|
|
return EINVAL;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCGIFADDR_IN6:
|
|
ifr->ifr_addr = ia->ia_addr;
|
|
break;
|
|
|
|
case SIOCGIFDSTADDR_IN6:
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
|
|
return(EINVAL);
|
|
ifr->ifr_dstaddr = ia->ia_dstaddr;
|
|
break;
|
|
|
|
case SIOCGIFNETMASK_IN6:
|
|
ifr->ifr_addr = ia->ia_prefixmask;
|
|
break;
|
|
|
|
case SIOCGIFAFLAG_IN6:
|
|
ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
|
|
break;
|
|
|
|
case SIOCSIFDSTADDR_IN6:
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
|
|
return(EINVAL);
|
|
oldaddr = ia->ia_dstaddr;
|
|
ia->ia_dstaddr = ifr->ifr_dstaddr;
|
|
|
|
/* link-local index check */
|
|
if (IN6_IS_ADDR_LINKLOCAL(&ia->ia_dstaddr.sin6_addr)) {
|
|
if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] == 0) {
|
|
/* interface ID is not embedded by the user */
|
|
ia->ia_dstaddr.sin6_addr.s6_addr16[1]
|
|
= htons(ifp->if_index);
|
|
}
|
|
else
|
|
if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] !=
|
|
htons(ifp->if_index)) {
|
|
ia->ia_dstaddr = oldaddr;
|
|
return(EINVAL); /* ifid is contradict */
|
|
}
|
|
}
|
|
|
|
if (ifp->if_ioctl && (error = (ifp->if_ioctl)
|
|
(ifp, SIOCSIFDSTADDR, (caddr_t)ia))) {
|
|
ia->ia_dstaddr = oldaddr;
|
|
return(error);
|
|
}
|
|
if (ia->ia_flags & IFA_ROUTE) {
|
|
ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr;
|
|
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
|
|
ia->ia_ifa.ifa_dstaddr =
|
|
(struct sockaddr *)&ia->ia_dstaddr;
|
|
rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
|
|
}
|
|
break;
|
|
|
|
case SIOCGIFALIFETIME_IN6:
|
|
ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
|
|
break;
|
|
|
|
case SIOCSIFALIFETIME_IN6:
|
|
ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
|
|
/* for sanity */
|
|
if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
|
|
ia->ia6_lifetime.ia6t_expire =
|
|
time_second + ia->ia6_lifetime.ia6t_vltime;
|
|
} else
|
|
ia->ia6_lifetime.ia6t_expire = 0;
|
|
if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
|
|
ia->ia6_lifetime.ia6t_preferred =
|
|
time_second + ia->ia6_lifetime.ia6t_pltime;
|
|
} else
|
|
ia->ia6_lifetime.ia6t_preferred = 0;
|
|
break;
|
|
|
|
case SIOCSIFADDR_IN6:
|
|
return(in6_ifinit(ifp, ia, &ifr->ifr_addr, 1));
|
|
|
|
case SIOCSIFNETMASK_IN6:
|
|
ia->ia_prefixmask = ifr->ifr_addr;
|
|
bzero(&net, sizeof(net));
|
|
net.sin6_len = sizeof(struct sockaddr_in6);
|
|
net.sin6_family = AF_INET6;
|
|
net.sin6_port = htons(0);
|
|
net.sin6_flowinfo = htonl(0);
|
|
net.sin6_addr.s6_addr32[0]
|
|
= ia->ia_addr.sin6_addr.s6_addr32[0] &
|
|
ia->ia_prefixmask.sin6_addr.s6_addr32[0];
|
|
net.sin6_addr.s6_addr32[1]
|
|
= ia->ia_addr.sin6_addr.s6_addr32[1] &
|
|
ia->ia_prefixmask.sin6_addr.s6_addr32[1];
|
|
net.sin6_addr.s6_addr32[2]
|
|
= ia->ia_addr.sin6_addr.s6_addr32[2] &
|
|
ia->ia_prefixmask.sin6_addr.s6_addr32[2];
|
|
net.sin6_addr.s6_addr32[3]
|
|
= ia->ia_addr.sin6_addr.s6_addr32[3] &
|
|
ia->ia_prefixmask.sin6_addr.s6_addr32[3];
|
|
ia->ia_net = net;
|
|
break;
|
|
|
|
case SIOCAIFADDR_IN6:
|
|
prefixIsNew = 0;
|
|
hostIsNew = 1;
|
|
|
|
if (ifra->ifra_addr.sin6_len == 0) {
|
|
ifra->ifra_addr = ia->ia_addr;
|
|
hostIsNew = 0;
|
|
} else if (IN6_ARE_ADDR_EQUAL(&ifra->ifra_addr.sin6_addr,
|
|
&ia->ia_addr.sin6_addr))
|
|
hostIsNew = 0;
|
|
|
|
if (ifra->ifra_prefixmask.sin6_len) {
|
|
in6_ifscrub(ifp, ia);
|
|
ia->ia_prefixmask = ifra->ifra_prefixmask;
|
|
prefixIsNew = 1;
|
|
}
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) &&
|
|
(ifra->ifra_dstaddr.sin6_family == AF_INET6)) {
|
|
in6_ifscrub(ifp, ia);
|
|
ia->ia_dstaddr = ifra->ifra_dstaddr;
|
|
/* link-local index check: should be a separate function? */
|
|
if (IN6_IS_ADDR_LINKLOCAL(&ia->ia_dstaddr.sin6_addr)) {
|
|
if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] == 0) {
|
|
/*
|
|
* interface ID is not embedded by
|
|
* the user
|
|
*/
|
|
ia->ia_dstaddr.sin6_addr.s6_addr16[1]
|
|
= htons(ifp->if_index);
|
|
}
|
|
else
|
|
if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] !=
|
|
htons(ifp->if_index)) {
|
|
ia->ia_dstaddr = oldaddr;
|
|
return(EINVAL); /* ifid is contradict */
|
|
}
|
|
}
|
|
prefixIsNew = 1; /* We lie; but effect's the same */
|
|
}
|
|
if (ifra->ifra_addr.sin6_family == AF_INET6 &&
|
|
(hostIsNew || prefixIsNew))
|
|
error = in6_ifinit(ifp, ia, &ifra->ifra_addr, 0);
|
|
if (ifra->ifra_addr.sin6_family == AF_INET6
|
|
&& hostIsNew && (ifp->if_flags & IFF_MULTICAST)) {
|
|
int error_local = 0;
|
|
|
|
/*
|
|
* join solicited multicast addr for new host id
|
|
*/
|
|
struct in6_addr llsol;
|
|
bzero(&llsol, sizeof(struct in6_addr));
|
|
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] =
|
|
ifra->ifra_addr.sin6_addr.s6_addr32[3];
|
|
llsol.s6_addr8[12] = 0xff;
|
|
(void)in6_addmulti(&llsol, ifp, &error_local);
|
|
if (error == 0)
|
|
error = error_local;
|
|
}
|
|
/* Join dstaddr's solicited multicast if necessary. */
|
|
if (nd6_proxyall && hostIsNew) {
|
|
int error_local;
|
|
|
|
error_local = in6_ifaddproxy(ia);
|
|
if (error == 0)
|
|
error = error_local;
|
|
}
|
|
|
|
ia->ia6_flags = ifra->ifra_flags;
|
|
ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/
|
|
|
|
ia->ia6_lifetime = ifra->ifra_lifetime;
|
|
/* for sanity */
|
|
if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
|
|
ia->ia6_lifetime.ia6t_expire =
|
|
time_second + ia->ia6_lifetime.ia6t_vltime;
|
|
} else
|
|
ia->ia6_lifetime.ia6t_expire = 0;
|
|
if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
|
|
ia->ia6_lifetime.ia6t_preferred =
|
|
time_second + ia->ia6_lifetime.ia6t_pltime;
|
|
} else
|
|
ia->ia6_lifetime.ia6t_preferred = 0;
|
|
|
|
/*
|
|
* Perform DAD, if needed.
|
|
* XXX It may be of use, if we can administratively
|
|
* disable DAD.
|
|
*/
|
|
switch (ifp->if_type) {
|
|
case IFT_ETHER:
|
|
case IFT_FDDI:
|
|
#if 0
|
|
case IFT_ATM:
|
|
case IFT_SLIP:
|
|
case IFT_PPP:
|
|
#endif
|
|
ia->ia6_flags |= IN6_IFF_TENTATIVE;
|
|
nd6_dad_start((struct ifaddr *)ia, NULL);
|
|
break;
|
|
case IFT_GIF:
|
|
case IFT_LOOP:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return(error);
|
|
|
|
case SIOCDIFADDR_IN6:
|
|
in6_ifscrub(ifp, ia);
|
|
|
|
if (ifp->if_flags & IFF_MULTICAST) {
|
|
/*
|
|
* delete solicited multicast addr for deleting host id
|
|
*/
|
|
struct in6_multi *in6m;
|
|
struct in6_addr llsol;
|
|
bzero(&llsol, sizeof(struct in6_addr));
|
|
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;
|
|
|
|
IN6_LOOKUP_MULTI(llsol, ifp, in6m);
|
|
if (in6m)
|
|
in6_delmulti(in6m);
|
|
}
|
|
/* Leave dstaddr's solicited multicast if necessary. */
|
|
if (nd6_proxyall)
|
|
in6_ifremproxy(ia);
|
|
|
|
TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list);
|
|
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;
|
|
else
|
|
printf("Didn't unlink in6_ifaddr from list\n");
|
|
}
|
|
|
|
if (oia->ia6_multiaddrs.lh_first == NULL) {
|
|
IFAFREE(&oia->ia_ifa);
|
|
break;
|
|
}
|
|
else
|
|
in6_savemkludge(oia);
|
|
|
|
IFAFREE((&oia->ia_ifa));
|
|
break;
|
|
|
|
default:
|
|
if (ifp == 0 || ifp->if_ioctl == 0)
|
|
return(EOPNOTSUPP);
|
|
return((*ifp->if_ioctl)(ifp, cmd, data));
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* SIOC[GAD]LIFADDR.
|
|
* SIOCGLIFADDR: get first address. (???)
|
|
* SIOCGLIFADDR with IFLR_PREFIX:
|
|
* get first address that matches the specified prefix.
|
|
* SIOCALIFADDR: add the specified address.
|
|
* SIOCALIFADDR with IFLR_PREFIX:
|
|
* add the specified prefix, filling hostid part from
|
|
* the first link-local address. prefixlen must be <= 64.
|
|
* SIOCDLIFADDR: delete the specified address.
|
|
* SIOCDLIFADDR with IFLR_PREFIX:
|
|
* delete the first address that matches the specified prefix.
|
|
* return values:
|
|
* EINVAL on invalid parameters
|
|
* EADDRNOTAVAIL on prefix match failed/specified address not found
|
|
* other values may be returned from in6_ioctl()
|
|
*
|
|
* NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
|
|
* this is to accomodate address naming scheme other than RFC2374,
|
|
* in the future.
|
|
* RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
|
|
* address encoding scheme. (see figure on page 8)
|
|
*/
|
|
static int
|
|
in6_lifaddr_ioctl(so, cmd, data, ifp, p)
|
|
struct socket *so;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
struct ifnet *ifp;
|
|
struct proc *p;
|
|
{
|
|
struct if_laddrreq *iflr = (struct if_laddrreq *)data;
|
|
struct ifaddr *ifa;
|
|
|
|
/* sanity checks */
|
|
if (!data || !ifp) {
|
|
panic("invalid argument to in6_lifaddr_ioctl");
|
|
/*NOTRECHED*/
|
|
}
|
|
|
|
switch (cmd) {
|
|
case SIOCGLIFADDR:
|
|
/* address must be specified on GET with IFLR_PREFIX */
|
|
if ((iflr->flags & IFLR_PREFIX) == 0)
|
|
break;
|
|
/*FALLTHROUGH*/
|
|
case SIOCALIFADDR:
|
|
case SIOCDLIFADDR:
|
|
/* address must be specified on ADD and DELETE */
|
|
if (iflr->addr.__ss_family != AF_INET6)
|
|
return EINVAL;
|
|
if (iflr->addr.__ss_len != sizeof(struct sockaddr_in6))
|
|
return EINVAL;
|
|
/* XXX need improvement */
|
|
if (iflr->dstaddr.__ss_family
|
|
&& iflr->dstaddr.__ss_family != AF_INET6)
|
|
return EINVAL;
|
|
if (iflr->dstaddr.__ss_family
|
|
&& iflr->dstaddr.__ss_len != sizeof(struct sockaddr_in6))
|
|
return EINVAL;
|
|
break;
|
|
default: /*shouldn't happen*/
|
|
#if 0
|
|
panic("invalid cmd to in6_lifaddr_ioctl");
|
|
/*NOTREACHED*/
|
|
#else
|
|
return EOPNOTSUPP;
|
|
#endif
|
|
}
|
|
if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
|
|
return EINVAL;
|
|
|
|
switch (cmd) {
|
|
case SIOCALIFADDR:
|
|
{
|
|
struct in6_aliasreq ifra;
|
|
struct in6_addr *hostid = NULL;
|
|
int prefixlen;
|
|
|
|
if ((iflr->flags & IFLR_PREFIX) != 0) {
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
/*
|
|
* hostid is to fill in the hostid part of the
|
|
* address. hostid points to the first link-local
|
|
* address attached to the interface.
|
|
*/
|
|
ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp);
|
|
if (!ifa)
|
|
return EADDRNOTAVAIL;
|
|
hostid = &IFA_IN6(ifa);
|
|
|
|
/* prefixlen must be <= 64. */
|
|
if (64 < iflr->prefixlen)
|
|
return EINVAL;
|
|
prefixlen = iflr->prefixlen;
|
|
|
|
/* hostid part must be zero. */
|
|
sin6 = (struct sockaddr_in6 *)&iflr->addr;
|
|
if (sin6->sin6_addr.s6_addr32[2] != 0
|
|
|| sin6->sin6_addr.s6_addr32[3] != 0) {
|
|
return EINVAL;
|
|
}
|
|
} else
|
|
prefixlen = iflr->prefixlen;
|
|
|
|
/* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
|
|
bzero(&ifra, sizeof(ifra));
|
|
bcopy(iflr->iflr_name, ifra.ifra_name,
|
|
sizeof(ifra.ifra_name));
|
|
|
|
bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.__ss_len);
|
|
if (hostid) {
|
|
/* fill in hostid part */
|
|
ifra.ifra_addr.sin6_addr.s6_addr32[2] =
|
|
hostid->s6_addr32[2];
|
|
ifra.ifra_addr.sin6_addr.s6_addr32[3] =
|
|
hostid->s6_addr32[3];
|
|
}
|
|
|
|
if (iflr->dstaddr.__ss_family) { /*XXX*/
|
|
bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
|
|
iflr->dstaddr.__ss_len);
|
|
if (hostid) {
|
|
ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
|
|
hostid->s6_addr32[2];
|
|
ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
|
|
hostid->s6_addr32[3];
|
|
}
|
|
}
|
|
|
|
ifra.ifra_prefixmask.sin6_family = AF_INET6;
|
|
ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
|
|
in6_len2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
|
|
|
|
ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
|
|
return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, p);
|
|
}
|
|
case SIOCGLIFADDR:
|
|
case SIOCDLIFADDR:
|
|
{
|
|
struct in6_ifaddr *ia;
|
|
struct in6_addr mask, candidate, match;
|
|
struct sockaddr_in6 *sin6;
|
|
int cmp;
|
|
|
|
bzero(&mask, sizeof(mask));
|
|
if (iflr->flags & IFLR_PREFIX) {
|
|
/* lookup a prefix rather than address. */
|
|
in6_len2mask(&mask, iflr->prefixlen);
|
|
|
|
sin6 = (struct sockaddr_in6 *)&iflr->addr;
|
|
bcopy(&sin6->sin6_addr, &match, sizeof(match));
|
|
match.s6_addr32[0] &= mask.s6_addr32[0];
|
|
match.s6_addr32[1] &= mask.s6_addr32[1];
|
|
match.s6_addr32[2] &= mask.s6_addr32[2];
|
|
match.s6_addr32[3] &= mask.s6_addr32[3];
|
|
|
|
/* if you set extra bits, that's wrong */
|
|
if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
|
|
return EINVAL;
|
|
|
|
cmp = 1;
|
|
} else {
|
|
if (cmd == SIOCGLIFADDR) {
|
|
/* on getting an address, take the 1st match */
|
|
cmp = 0; /*XXX*/
|
|
} else {
|
|
/* on deleting an address, do exact match */
|
|
in6_len2mask(&mask, 128);
|
|
sin6 = (struct sockaddr_in6 *)&iflr->addr;
|
|
bcopy(&sin6->sin6_addr, &match, sizeof(match));
|
|
|
|
cmp = 1;
|
|
}
|
|
}
|
|
|
|
for (ifa = ifp->if_addrlist.tqh_first;
|
|
ifa;
|
|
ifa = ifa->ifa_list.tqe_next) {
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
|
continue;
|
|
if (!cmp)
|
|
break;
|
|
bcopy(&IFA_IN6(ifa), &candidate, sizeof(candidate));
|
|
candidate.s6_addr32[0] &= mask.s6_addr32[0];
|
|
candidate.s6_addr32[1] &= mask.s6_addr32[1];
|
|
candidate.s6_addr32[2] &= mask.s6_addr32[2];
|
|
candidate.s6_addr32[3] &= mask.s6_addr32[3];
|
|
if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
|
|
break;
|
|
}
|
|
if (!ifa)
|
|
return EADDRNOTAVAIL;
|
|
ia = ifa2ia6(ifa);
|
|
|
|
if (cmd == SIOCGLIFADDR) {
|
|
/* fill in the if_laddrreq structure */
|
|
bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
|
|
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
|
|
bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
|
|
ia->ia_dstaddr.sin6_len);
|
|
} else
|
|
bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
|
|
|
|
iflr->prefixlen =
|
|
in6_mask2len(&ia->ia_prefixmask.sin6_addr);
|
|
|
|
iflr->flags = ia->ia6_flags; /*XXX*/
|
|
|
|
return 0;
|
|
} else {
|
|
struct in6_aliasreq ifra;
|
|
|
|
/* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
|
|
bzero(&ifra, sizeof(ifra));
|
|
bcopy(iflr->iflr_name, ifra.ifra_name,
|
|
sizeof(ifra.ifra_name));
|
|
|
|
bcopy(&ia->ia_addr, &ifra.ifra_addr,
|
|
ia->ia_addr.sin6_len);
|
|
if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
|
|
bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
|
|
ia->ia_dstaddr.sin6_len);
|
|
}
|
|
bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
|
|
ia->ia_prefixmask.sin6_len);
|
|
|
|
ifra.ifra_flags = ia->ia6_flags;
|
|
return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
|
|
ifp, p);
|
|
}
|
|
}
|
|
}
|
|
|
|
return EOPNOTSUPP; /*just for safety*/
|
|
}
|
|
|
|
/*
|
|
* Delete any existing route for an interface.
|
|
*/
|
|
void
|
|
in6_ifscrub(ifp, ia)
|
|
register struct ifnet *ifp;
|
|
register struct in6_ifaddr *ia;
|
|
{
|
|
if ((ia->ia_flags & IFA_ROUTE) == 0)
|
|
return;
|
|
if (ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT))
|
|
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
|
|
else
|
|
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
|
|
ia->ia_flags &= ~IFA_ROUTE;
|
|
|
|
/* Remove ownaddr's loopback rtentry, if it exists. */
|
|
in6_ifremloop(&(ia->ia_ifa));
|
|
}
|
|
|
|
/*
|
|
* Initialize an interface's intetnet6 address
|
|
* and routing table entry.
|
|
*/
|
|
int
|
|
in6_ifinit(ifp, ia, sin6, scrub)
|
|
struct ifnet *ifp;
|
|
struct in6_ifaddr *ia;
|
|
struct sockaddr_in6 *sin6;
|
|
int scrub;
|
|
{
|
|
struct sockaddr_in6 oldaddr;
|
|
int error, flags = RTF_UP;
|
|
int s = splimp();
|
|
|
|
oldaddr = ia->ia_addr;
|
|
ia->ia_addr = *sin6;
|
|
/*
|
|
* Give the interface a chance to initialize
|
|
* if this is its first address,
|
|
* and to validate the address if necessary.
|
|
*/
|
|
if (ifp->if_ioctl &&
|
|
(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia))) {
|
|
splx(s);
|
|
ia->ia_addr = oldaddr;
|
|
return(error);
|
|
}
|
|
|
|
switch (ifp->if_type) {
|
|
case IFT_ETHER:
|
|
case IFT_FDDI:
|
|
ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
|
|
ia->ia_ifa.ifa_flags |= RTF_CLONING;
|
|
break;
|
|
case IFT_PPP:
|
|
ia->ia_ifa.ifa_rtrequest = nd6_p2p_rtrequest;
|
|
ia->ia_ifa.ifa_flags |= RTF_CLONING;
|
|
break;
|
|
}
|
|
|
|
splx(s);
|
|
if (scrub) {
|
|
ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
|
|
in6_ifscrub(ifp, ia);
|
|
ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
|
|
}
|
|
/* xxx
|
|
* in_socktrim
|
|
*/
|
|
/*
|
|
* Add route for the network.
|
|
*/
|
|
ia->ia_ifa.ifa_metric = ifp->if_metric;
|
|
if (ifp->if_flags & IFF_LOOPBACK) {
|
|
ia->ia_ifa.ifa_dstaddr = ia->ia_ifa.ifa_addr;
|
|
flags |= RTF_HOST;
|
|
} else if (ifp->if_flags & IFF_POINTOPOINT) {
|
|
if (ia->ia_dstaddr.sin6_family != AF_INET6)
|
|
return(0);
|
|
flags |= RTF_HOST;
|
|
}
|
|
if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD, flags)) == 0)
|
|
ia->ia_flags |= IFA_ROUTE;
|
|
|
|
/* Add ownaddr as loopback rtentry, if necessary(ex. on p2p link). */
|
|
in6_ifaddloop(&(ia->ia_ifa));
|
|
|
|
#if !defined(__FreeBSD__) || __FreeBSD__ < 3
|
|
if (ifp->if_flags & IFF_MULTICAST)
|
|
in6_restoremkludge(ia, ifp);
|
|
#endif
|
|
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* Multicast address kludge:
|
|
* If there were any multicast addresses attached to this interface address,
|
|
* either move them to another address on this interface, or save them until
|
|
* such time as this interface is reconfigured for IPv6.
|
|
*/
|
|
void
|
|
in6_savemkludge(oia)
|
|
struct in6_ifaddr *oia;
|
|
{
|
|
struct in6_ifaddr *ia;
|
|
struct in6_multi *in6m, *next;
|
|
|
|
IFP_TO_IA6(oia->ia_ifp, ia);
|
|
if (ia) { /* there is another address */
|
|
for (in6m = oia->ia6_multiaddrs.lh_first; in6m; in6m = next){
|
|
next = in6m->in6m_entry.le_next;
|
|
IFAFREE(&in6m->in6m_ia->ia_ifa);
|
|
ia->ia_ifa.ifa_refcnt++;
|
|
in6m->in6m_ia = ia;
|
|
LIST_INSERT_HEAD(&ia->ia6_multiaddrs, in6m, in6m_entry);
|
|
}
|
|
} else { /* last address on this if deleted, save */
|
|
struct multi6_kludge *mk;
|
|
|
|
mk = malloc(sizeof(*mk), M_IPMADDR, M_WAITOK);
|
|
|
|
LIST_INIT(&mk->mk_head);
|
|
mk->mk_ifp = oia->ia_ifp;
|
|
|
|
for (in6m = oia->ia6_multiaddrs.lh_first; in6m; in6m = next){
|
|
next = in6m->in6m_entry.le_next;
|
|
LIST_INSERT_HEAD(&mk->mk_head, in6m, in6m_entry);
|
|
}
|
|
|
|
if (mk->mk_head.lh_first != NULL) {
|
|
LIST_INSERT_HEAD(&in6_mk, mk, mk_entry);
|
|
}
|
|
else {
|
|
FREE(mk, M_IPMADDR);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Continuation of multicast address hack:
|
|
* If there was a multicast group list previously saved for this interface,
|
|
* then we re-attach it to the first address configured on the i/f.
|
|
*/
|
|
void
|
|
in6_restoremkludge(ia, ifp)
|
|
struct in6_ifaddr *ia;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct multi6_kludge *mk;
|
|
|
|
for (mk = in6_mk.lh_first; mk; mk = mk->mk_entry.le_next) {
|
|
if (mk->mk_ifp == ifp) {
|
|
struct in6_multi *in6m, *next;
|
|
|
|
for (in6m = mk->mk_head.lh_first; in6m; in6m = next){
|
|
next = in6m->in6m_entry.le_next;
|
|
LIST_INSERT_HEAD(&ia->ia6_multiaddrs,
|
|
in6m, in6m_entry);
|
|
}
|
|
LIST_REMOVE(mk, mk_entry);
|
|
free(mk, M_IPMADDR);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Add an address to the list of IP6 multicast addresses for a
|
|
* given interface.
|
|
*/
|
|
struct in6_multi *
|
|
in6_addmulti(maddr6, ifp, errorp)
|
|
register struct in6_addr *maddr6;
|
|
register struct ifnet *ifp;
|
|
int *errorp;
|
|
{
|
|
struct in6_ifaddr *ia;
|
|
struct in6_ifreq ifr;
|
|
struct in6_multi *in6m;
|
|
int s = splsoftnet();
|
|
|
|
*errorp = 0;
|
|
/*
|
|
* See if address already in list.
|
|
*/
|
|
IN6_LOOKUP_MULTI(*maddr6, ifp, in6m);
|
|
if (in6m != NULL) {
|
|
/*
|
|
* Found it; just increment the refrence count.
|
|
*/
|
|
in6m->in6m_refcount++;
|
|
} else {
|
|
/*
|
|
* New address; allocate a new multicast record
|
|
* and link it into the interface's multicast list.
|
|
*/
|
|
in6m = (struct in6_multi *)
|
|
malloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT);
|
|
if (in6m == NULL) {
|
|
splx(s);
|
|
*errorp = ENOBUFS;
|
|
return(NULL);
|
|
}
|
|
in6m->in6m_addr = *maddr6;
|
|
in6m->in6m_ifp = ifp;
|
|
in6m->in6m_refcount = 1;
|
|
IFP_TO_IA6(ifp, ia);
|
|
if (ia == NULL) {
|
|
free(in6m, M_IPMADDR);
|
|
splx(s);
|
|
*errorp = EADDRNOTAVAIL; /* appropriate? */
|
|
return(NULL);
|
|
}
|
|
in6m->in6m_ia = ia;
|
|
ia->ia_ifa.ifa_refcnt++; /* gain a reference */
|
|
LIST_INSERT_HEAD(&ia->ia6_multiaddrs, in6m, in6m_entry);
|
|
|
|
/*
|
|
* Ask the network driver to update its multicast reception
|
|
* filter appropriately for the new address.
|
|
*/
|
|
bzero(&ifr.ifr_addr, sizeof(struct sockaddr_in6));
|
|
ifr.ifr_addr.sin6_len = sizeof(struct sockaddr_in6);
|
|
ifr.ifr_addr.sin6_family = AF_INET6;
|
|
ifr.ifr_addr.sin6_addr = *maddr6;
|
|
if (ifp->if_ioctl == NULL)
|
|
*errorp = ENXIO; /* XXX: appropriate? */
|
|
else
|
|
*errorp = (*ifp->if_ioctl)(ifp, SIOCADDMULTI,
|
|
(caddr_t)&ifr);
|
|
if (*errorp) {
|
|
LIST_REMOVE(in6m, in6m_entry);
|
|
free(in6m, M_IPMADDR);
|
|
splx(s);
|
|
return(NULL);
|
|
}
|
|
/*
|
|
* Let MLD6 know that we have joined a new IP6 multicast
|
|
* group.
|
|
*/
|
|
mld6_start_listening(in6m);
|
|
}
|
|
splx(s);
|
|
return(in6m);
|
|
}
|
|
|
|
/*
|
|
* Delete a multicast address record.
|
|
*/
|
|
void
|
|
in6_delmulti(in6m)
|
|
struct in6_multi *in6m;
|
|
{
|
|
struct in6_ifreq ifr;
|
|
int s = splsoftnet();
|
|
|
|
if (--in6m->in6m_refcount == 0) {
|
|
/*
|
|
* No remaining claims to this record; let MLD6 know
|
|
* that we are leaving the multicast group.
|
|
*/
|
|
mld6_stop_listening(in6m);
|
|
|
|
/*
|
|
* Unlink from list.
|
|
*/
|
|
LIST_REMOVE(in6m, in6m_entry);
|
|
IFAFREE(&in6m->in6m_ia->ia_ifa); /* release reference */
|
|
|
|
/*
|
|
* Notify the network driver to update its multicast
|
|
* reception filter.
|
|
*/
|
|
bzero(&ifr.ifr_addr, sizeof(struct sockaddr_in6));
|
|
ifr.ifr_addr.sin6_len = sizeof(struct sockaddr_in6);
|
|
ifr.ifr_addr.sin6_family = AF_INET6;
|
|
ifr.ifr_addr.sin6_addr = in6m->in6m_addr;
|
|
(*in6m->in6m_ifp->if_ioctl)(in6m->in6m_ifp,
|
|
SIOCDELMULTI, (caddr_t)&ifr);
|
|
free(in6m, M_IPMADDR);
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
/*
|
|
* Find an IPv6 interface link-local address specific to an interface.
|
|
*/
|
|
struct in6_ifaddr *
|
|
in6ifa_ifpforlinklocal(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
register struct ifaddr *ifa;
|
|
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) {
|
|
if (ifa->ifa_addr == NULL)
|
|
continue; /* just for safety */
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
|
continue;
|
|
if (IN6_IS_ADDR_LINKLOCAL(&IFA_IN6(ifa)))
|
|
break;
|
|
}
|
|
|
|
return((struct in6_ifaddr *)ifa);
|
|
}
|
|
|
|
|
|
/*
|
|
* find the internet address corresponding to a given interface and address.
|
|
*/
|
|
struct in6_ifaddr *
|
|
in6ifa_ifpwithaddr(ifp, addr)
|
|
struct ifnet *ifp;
|
|
struct in6_addr *addr;
|
|
{
|
|
register struct ifaddr *ifa;
|
|
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) {
|
|
if (ifa->ifa_addr == NULL)
|
|
continue; /* just for safety */
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
|
continue;
|
|
if (IN6_ARE_ADDR_EQUAL(addr, &IFA_IN6(ifa)))
|
|
break;
|
|
}
|
|
|
|
return((struct in6_ifaddr *)ifa);
|
|
}
|
|
|
|
/*
|
|
* Convert IP6 address to printable (loggable) representation.
|
|
*/
|
|
static char digits[] = "0123456789abcdef";
|
|
static int ip6round = 0;
|
|
char *
|
|
ip6_sprintf(addr)
|
|
register struct in6_addr *addr;
|
|
{
|
|
static char ip6buf[8][48];
|
|
register int i;
|
|
register char *cp;
|
|
register u_short *a = (u_short *)addr;
|
|
register u_char *d;
|
|
int dcolon = 0;
|
|
|
|
ip6round = (ip6round + 1) & 7;
|
|
cp = ip6buf[ip6round];
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
if (dcolon == 1) {
|
|
if (*a == 0) {
|
|
if (i == 7)
|
|
*cp++ = ':';
|
|
a++;
|
|
continue;
|
|
} else
|
|
dcolon = 2;
|
|
}
|
|
if (*a == 0) {
|
|
if (dcolon == 0 && *(a + 1) == 0) {
|
|
if (i == 0)
|
|
*cp++ = ':';
|
|
*cp++ = ':';
|
|
dcolon = 1;
|
|
} else {
|
|
*cp++ = '0';
|
|
*cp++ = ':';
|
|
}
|
|
a++;
|
|
continue;
|
|
}
|
|
d = (u_char *)a;
|
|
*cp++ = digits[*d >> 4];
|
|
*cp++ = digits[*d++ & 0xf];
|
|
*cp++ = digits[*d >> 4];
|
|
*cp++ = digits[*d & 0xf];
|
|
*cp++ = ':';
|
|
a++;
|
|
}
|
|
*--cp = 0;
|
|
return(ip6buf[ip6round]);
|
|
}
|
|
|
|
int
|
|
in6_localaddr(in6)
|
|
struct in6_addr *in6;
|
|
{
|
|
struct in6_ifaddr *ia;
|
|
|
|
if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
|
|
return 1;
|
|
|
|
for (ia = in6_ifaddr; ia; ia = ia->ia_next)
|
|
if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
|
|
&ia->ia_prefixmask.sin6_addr))
|
|
return 1;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Get a scope of the address. Node-local, link-local, site-local or global.
|
|
*/
|
|
int
|
|
in6_addrscope (addr)
|
|
struct in6_addr *addr;
|
|
{
|
|
int scope;
|
|
|
|
if (addr->s6_addr8[0] == 0xfe) {
|
|
scope = addr->s6_addr8[1] & 0xc0;
|
|
|
|
switch (scope) {
|
|
case 0x80:
|
|
return IPV6_ADDR_SCOPE_LINKLOCAL;
|
|
break;
|
|
case 0xc0:
|
|
return IPV6_ADDR_SCOPE_SITELOCAL;
|
|
break;
|
|
default:
|
|
return IPV6_ADDR_SCOPE_GLOBAL; /* just in case */
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
if (addr->s6_addr8[0] == 0xff) {
|
|
scope = addr->s6_addr8[1] & 0x0f;
|
|
|
|
/*
|
|
* due to other scope such as reserved,
|
|
* return scope doesn't work.
|
|
*/
|
|
switch (scope) {
|
|
case IPV6_ADDR_SCOPE_NODELOCAL:
|
|
return IPV6_ADDR_SCOPE_NODELOCAL;
|
|
break;
|
|
case IPV6_ADDR_SCOPE_LINKLOCAL:
|
|
return IPV6_ADDR_SCOPE_LINKLOCAL;
|
|
break;
|
|
case IPV6_ADDR_SCOPE_SITELOCAL:
|
|
return IPV6_ADDR_SCOPE_SITELOCAL;
|
|
break;
|
|
default:
|
|
return IPV6_ADDR_SCOPE_GLOBAL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (bcmp(&in6addr_loopback, addr, sizeof(addr) - 1) == 0) {
|
|
if (addr->s6_addr8[15] == 1) /* loopback */
|
|
return IPV6_ADDR_SCOPE_NODELOCAL;
|
|
if (addr->s6_addr8[15] == 0) /* unspecified */
|
|
return IPV6_ADDR_SCOPE_LINKLOCAL;
|
|
}
|
|
|
|
return IPV6_ADDR_SCOPE_GLOBAL;
|
|
}
|
|
|
|
/*
|
|
* return length of part which dst and src are equal
|
|
* hard coding...
|
|
*/
|
|
|
|
int
|
|
in6_matchlen(src, dst)
|
|
struct in6_addr *src, *dst;
|
|
{
|
|
int match = 0;
|
|
u_char *s = (u_char *)src, *d = (u_char *)dst;
|
|
u_char *lim = s + 16, r;
|
|
|
|
while (s < lim)
|
|
if ((r = (*d++ ^ *s++)) != 0) {
|
|
while (r < 128) {
|
|
match++;
|
|
r <<= 1;
|
|
}
|
|
break;
|
|
} else
|
|
match += 8;
|
|
return match;
|
|
}
|
|
|
|
/*
|
|
* return the best address out of the same scope
|
|
*/
|
|
|
|
struct in6_ifaddr *
|
|
in6_ifawithscope(ifp, dst)
|
|
register struct ifnet *ifp;
|
|
register struct in6_addr *dst;
|
|
{
|
|
int dst_scope = in6_addrscope(dst), blen = -1, tlen;
|
|
struct ifaddr *ifa;
|
|
struct in6_ifaddr *besta = 0, *ia;
|
|
|
|
/*
|
|
* We first look for addresses in the same scope.
|
|
* If there is one, return it.
|
|
* If two or more, return one which matches the dst longest.
|
|
* If none, return one of global addresses assigned other ifs.
|
|
*/
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) {
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
|
continue;
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
|
|
continue; /* XXX: is there any case to allow anycast? */
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
|
|
continue; /* don't use this interface */
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
|
|
continue;
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED)
|
|
continue;
|
|
|
|
if (dst_scope == in6_addrscope(&IFA_IN6(ifa))) {
|
|
/*
|
|
* call in6_matchlen() as few as possible
|
|
*/
|
|
if (besta) {
|
|
if (blen == -1)
|
|
blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
|
|
tlen = in6_matchlen(&IFA_IN6(ifa), dst);
|
|
if (tlen > blen) {
|
|
blen = tlen;
|
|
besta = (struct in6_ifaddr *)ifa;
|
|
}
|
|
} else
|
|
besta = (struct in6_ifaddr *)ifa;
|
|
}
|
|
}
|
|
if (besta)
|
|
return(besta);
|
|
|
|
for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
|
|
if (IPV6_ADDR_SCOPE_GLOBAL ==
|
|
in6_addrscope(&(ia->ia_addr.sin6_addr))
|
|
&& (ia->ia6_flags & IN6_IFF_ANYCAST) == 0
|
|
&& (ia->ia6_flags & IN6_IFF_NOTREADY) == 0
|
|
&& (ia->ia6_flags & IN6_IFF_DETACHED) == 0
|
|
&& (ia->ia6_flags & IN6_IFF_DEPRECATED) == 0) {
|
|
/* XXX: is there any case to allow anycast? */
|
|
return ia;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* return the best address out of the same scope. if no address was
|
|
* found, return the first valid address from designated IF.
|
|
*/
|
|
|
|
struct in6_ifaddr *
|
|
in6_ifawithifp(ifp, dst)
|
|
register struct ifnet *ifp;
|
|
register struct in6_addr *dst;
|
|
{
|
|
int dst_scope = in6_addrscope(dst), blen = -1, tlen;
|
|
struct ifaddr *ifa;
|
|
struct in6_ifaddr *besta = 0;
|
|
|
|
/*
|
|
* We first look for addresses in the same scope.
|
|
* If there is one, return it.
|
|
* If two or more, return one which matches the dst longest.
|
|
* If none, return one of global addresses assigned other ifs.
|
|
*/
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) {
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
|
continue;
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
|
|
continue; /* XXX: is there any case to allow anycast? */
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
|
|
continue; /* don't use this interface */
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
|
|
continue;
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED)
|
|
continue;
|
|
|
|
if (dst_scope == in6_addrscope(&IFA_IN6(ifa))) {
|
|
/*
|
|
* call in6_matchlen() as few as possible
|
|
*/
|
|
if (besta) {
|
|
if (blen == -1)
|
|
blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
|
|
tlen = in6_matchlen(&IFA_IN6(ifa), dst);
|
|
if (tlen > blen) {
|
|
blen = tlen;
|
|
besta = (struct in6_ifaddr *)ifa;
|
|
}
|
|
} else
|
|
besta = (struct in6_ifaddr *)ifa;
|
|
}
|
|
}
|
|
if (besta)
|
|
return(besta);
|
|
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) {
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
|
continue;
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
|
|
continue; /* XXX: is there any case to allow anycast? */
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
|
|
continue; /* don't use this interface */
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
|
|
continue;
|
|
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED)
|
|
continue;
|
|
|
|
return (struct in6_ifaddr *)ifa;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* perform DAD when interface becomes IFF_UP.
|
|
*/
|
|
void
|
|
in6_if_up(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct in6_ifaddr *ia;
|
|
struct sockaddr_dl *sdl;
|
|
int type;
|
|
struct ether_addr ea;
|
|
int off;
|
|
int dad_delay; /* delay ticks before DAD output */
|
|
|
|
bzero(&ea, sizeof(ea));
|
|
sdl = NULL;
|
|
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) {
|
|
if (ifa->ifa_addr->sa_family == AF_INET6
|
|
&& IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
|
|
goto dad;
|
|
}
|
|
if (ifa->ifa_addr->sa_family != AF_LINK)
|
|
continue;
|
|
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
|
|
break;
|
|
}
|
|
|
|
switch (ifp->if_type) {
|
|
case IFT_SLIP:
|
|
case IFT_PPP:
|
|
case IFT_GIF:
|
|
case IFT_FAITH:
|
|
type = IN6_IFT_P2P;
|
|
in6_ifattach(ifp, type, 0, 1);
|
|
break;
|
|
case IFT_ETHER:
|
|
case IFT_FDDI:
|
|
case IFT_ATM:
|
|
type = IN6_IFT_802;
|
|
if (sdl == NULL)
|
|
break;
|
|
off = sdl->sdl_nlen;
|
|
if (bcmp(&sdl->sdl_data[off], &ea, sizeof(ea)) != 0)
|
|
in6_ifattach(ifp, type, LLADDR(sdl), 0);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
dad:
|
|
dad_delay = 0;
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) {
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
|
continue;
|
|
ia = (struct in6_ifaddr *)ifa;
|
|
if (ia->ia6_flags & IN6_IFF_TENTATIVE)
|
|
nd6_dad_start(ifa, &dad_delay);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Calculate max IPv6 MTU through all the interfaces and store it
|
|
* to in6_maxmtu.
|
|
*/
|
|
void
|
|
in6_setmaxmtu()
|
|
{
|
|
unsigned long maxmtu = 0;
|
|
struct ifnet *ifp;
|
|
|
|
for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) {
|
|
if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
|
|
nd_ifinfo[ifp->if_index].linkmtu > maxmtu)
|
|
maxmtu = nd_ifinfo[ifp->if_index].linkmtu;
|
|
}
|
|
if (maxmtu) /* update only when maxmtu is positive */
|
|
in6_maxmtu = maxmtu;
|
|
}
|