-/* $KAME: nd6.c,v 1.51.2.1 2000/04/13 11:59:29 jinmei Exp $ */
+/* $FreeBSD: src/sys/netinet6/nd6.c,v 1.2.2.9 2001/07/11 09:39:04 ume Exp $ */
+/* $KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/errno.h>
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
-#include <sys/ioctl.h>
-#endif
#include <sys/syslog.h>
#include <sys/protosw.h>
#include <kern/queue.h>
+#define DONT_WARN_OBSOLETE
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
-#if !(defined(__bsdi__) && _BSDI_VERSION >= 199802) && !defined(__APPLE__)
#include <net/if_atm.h>
-#endif
#include <net/route.h>
#include <net/dlil.h>
#include <netinet/in.h>
-#ifndef __NetBSD__
#include <netinet/if_ether.h>
-#if __FreeBSD__
#include <netinet/if_fddi.h>
-#endif
-#ifdef __bsdi__
-#include <net/if_fddi.h>
-#endif
-#else /* __NetBSD__ */
-#include <net/if_ether.h>
-#include <netinet/if_inarp.h>
-#include <net/if_fddi.h>
-#endif /* __NetBSD__ */
#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/in6_prefix.h>
#include <netinet/icmp6.h>
-#ifndef __bsdi__
#include "loop.h"
-#endif
-#if defined(__NetBSD__) || defined(__OpenBSD__)
-extern struct ifnet loif[NLOOP];
-#endif
#include <net/net_osdep.h>
int nd6_umaxtries = 3; /* maximum unicast query */
int nd6_mmaxtries = 3; /* maximum multicast query */
int nd6_useloopback = 1; /* use loopback interface for local traffic */
+int nd6_gctimer = (60 * 60 * 24); /* 1 day: garbage collection timer */
/* preventing too many loops in ND option parsing */
int nd6_maxndopt = 10; /* max # of ND options allowed */
+int nd6_maxnudhint = 0; /* max # of subsequent upper layer hints */
+
+#if ND6_DEBUG
+int nd6_debug = 1;
+#else
+int nd6_debug = 0;
+#endif
+
/* for debugging? */
static int nd6_inuse, nd6_allocated;
struct llinfo_nd6 llinfo_nd6 = {&llinfo_nd6, &llinfo_nd6};
+static size_t nd_ifinfo_indexlim = 8;
struct nd_ifinfo *nd_ifinfo = NULL;
struct nd_drhead nd_defrouter;
struct nd_prhead nd_prefix = { 0 };
int nd6_recalc_reachtm_interval = ND6_RECALC_REACHTM_INTERVAL;
static struct sockaddr_in6 all1_sa;
-static void nd6_slowtimo __P((void *));
static void nd6_slowtimo_funneled __P((void *));
+static int regen_tmpaddr __P((struct in6_ifaddr *));
-#if MIP6
-void (*mip6_expired_defrouter_hook)(struct nd_defrouter *dr) = 0;
-#endif
void
nd6_init()
nd6_ifattach(ifp)
struct ifnet *ifp;
{
- static size_t if_indexlim = 8;
/*
* We have some arrays that should be indexed by if_index.
* since if_index will grow dynamically, they should grow too.
*/
- if (nd_ifinfo == NULL || if_index >= if_indexlim) {
+ if (nd_ifinfo == NULL || if_index >= nd_ifinfo_indexlim) {
size_t n;
caddr_t q;
- while (if_index >= if_indexlim)
- if_indexlim <<= 1;
+ while (if_index >= nd_ifinfo_indexlim)
+ nd_ifinfo_indexlim <<= 1;
/* grow nd_ifinfo */
- n = if_indexlim * sizeof(struct nd_ifinfo);
+ n = nd_ifinfo_indexlim * sizeof(struct nd_ifinfo);
q = (caddr_t)_MALLOC(n, M_IP6NDP, M_WAITOK);
bzero(q, n);
if (nd_ifinfo) {
bcopy((caddr_t)nd_ifinfo, q, n/2);
- _FREE((caddr_t)nd_ifinfo, M_IP6NDP);
+ FREE((caddr_t)nd_ifinfo, M_IP6NDP);
}
nd_ifinfo = (struct nd_ifinfo *)q;
}
#define ND nd_ifinfo[ifp->if_index]
+
+ /*
+ * Don't initialize if called twice.
+ * XXX: to detect this, we should choose a member that is never set
+ * before initialization of the ND structure itself. We formaly used
+ * the linkmtu member, which was not suitable because it could be
+ * initialized via "ifconfig mtu".
+ */
+ if (ND.basereachable)
+ return;
+
ND.linkmtu = ifindex2ifnet[ifp->if_index]->if_mtu;
ND.chlim = IPV6_DEFHLIM;
ND.basereachable = REACHABLE_TIME;
nd6_setmtu(ifp)
struct ifnet *ifp;
{
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
struct nd_ifinfo *ndi = &nd_ifinfo[ifp->if_index];
u_long oldmaxmtu = ndi->maxmtu;
u_long oldlinkmtu = ndi->linkmtu;
- switch(ifp->if_type) {
- case IFT_ARCNET: /* XXX MTU handling needs more work */
- ndi->maxmtu = MIN(60480, ifp->if_mtu);
- break;
- case IFT_ETHER:
- ndi->maxmtu = MIN(ETHERMTU, ifp->if_mtu);
- break;
-#if defined(__FreeBSD__) || defined(__bsdi__)
- case IFT_FDDI:
- ndi->maxmtu = MIN(FDDIIPMTU, ifp->if_mtu);
- break;
-#endif
-#if !(defined(__bsdi__) && _BSDI_VERSION >= 199802) && !defined (__APPLE__)
- case IFT_ATM:
- ndi->maxmtu = MIN(ATMMTU, ifp->if_mtu);
- break;
+ switch (ifp->if_type) {
+ case IFT_ARCNET: /* XXX MTU handling needs more work */
+ ndi->maxmtu = MIN(60480, ifp->if_mtu);
+ break;
+ case IFT_ETHER:
+ ndi->maxmtu = MIN(ETHERMTU, ifp->if_mtu);
+ break;
+ case IFT_FDDI:
+ ndi->maxmtu = MIN(FDDIIPMTU, ifp->if_mtu);
+ break;
+ case IFT_ATM:
+ ndi->maxmtu = MIN(ATMMTU, ifp->if_mtu);
+ break;
+ case IFT_IEEE1394: /* XXX should be IEEE1394MTU(1500) */
+ ndi->maxmtu = MIN(ETHERMTU, ifp->if_mtu);
+ break;
+#if IFT_IEEE80211
+ case IFT_IEEE80211: /* XXX should be IEEE80211MTU(1500) */
+ ndi->maxmtu = MIN(ETHERMTU, ifp->if_mtu);
+ break;
#endif
- default:
- ndi->maxmtu = ifp->if_mtu;
- break;
+ default:
+ ndi->maxmtu = ifp->if_mtu;
+ break;
}
if (oldmaxmtu != ndi->maxmtu) {
*/
if (in6_maxmtu < ndi->linkmtu)
in6_maxmtu = ndi->linkmtu;
- }
- else
+ } else
in6_setmaxmtu();
}
}
nd_opt = ndopts->nd_opts_search;
+ /* make sure nd_opt_len is inside the buffer */
+ if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) {
+ bzero(ndopts, sizeof(*ndopts));
+ return NULL;
+ }
+
olen = nd_opt->nd_opt_len << 3;
if (olen == 0) {
/*
}
ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen);
- if (!(ndopts->nd_opts_search < ndopts->nd_opts_last)) {
+ if (ndopts->nd_opts_search > ndopts->nd_opts_last) {
+ /* option overruns the end of buffer, invalid */
+ bzero(ndopts, sizeof(*ndopts));
+ return NULL;
+ } else if (ndopts->nd_opts_search == ndopts->nd_opts_last) {
+ /* reached the end of options chain */
ndopts->nd_opts_done = 1;
ndopts->nd_opts_search = NULL;
}
* Message validation requires that all included
* options have a length that is greater than zero.
*/
+ icmp6stat.icp6s_nd_badopt++;
bzero(ndopts, sizeof(*ndopts));
return -1;
}
case ND_OPT_TARGET_LINKADDR:
case ND_OPT_MTU:
case ND_OPT_REDIRECTED_HEADER:
- case ND_OPT_ADV_INTERVAL:
if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
- printf("duplicated ND6 option found "
- "(type=%d)\n", nd_opt->nd_opt_type);
+ nd6log((LOG_INFO,
+ "duplicated ND6 option found (type=%d)\n",
+ nd_opt->nd_opt_type));
/* XXX bark? */
} else {
ndopts->nd_opt_array[nd_opt->nd_opt_type]
ndopts->nd_opts_pi_end =
(struct nd_opt_prefix_info *)nd_opt;
break;
- case ND_OPT_HA_INFORMATION:
- break;
default:
/*
* Unknown options must be silently ignored,
* to accomodate future extension to the protocol.
*/
- log(LOG_DEBUG,
+ nd6log((LOG_DEBUG,
"nd6_options: unsupported option %d - "
- "option ignored\n", nd_opt->nd_opt_type);
+ "option ignored\n", nd_opt->nd_opt_type));
}
skip1:
i++;
if (i > nd6_maxndopt) {
icmp6stat.icp6s_nd_toomanyopt++;
- printf("too many loop in nd opt\n");
+ nd6log((LOG_INFO, "too many loop in nd opt\n"));
break;
}
void *ignored_arg;
{
int s;
- register struct llinfo_nd6 *ln;
- register struct nd_defrouter *dr;
- register struct nd_prefix *pr;
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__)
- long time_second = time.tv_sec;
-#endif
+ struct llinfo_nd6 *ln;
+ struct nd_defrouter *dr;
+ struct nd_prefix *pr;
+ struct ifnet *ifp;
+ struct in6_ifaddr *ia6, *nia6;
+ struct in6_addrlifetime *lt6;
-#if __NetBSD__
- s = splsoftnet();
-#else
s = splnet();
-#endif
+
timeout(nd6_timer_funneled, (caddr_t)0, nd6_prune * hz);
ln = llinfo_nd6.ln_next;
/* XXX BSD/OS separates this code -- itojun */
while (ln && ln != &llinfo_nd6) {
struct rtentry *rt;
- struct ifnet *ifp;
struct sockaddr_in6 *dst;
struct llinfo_nd6 *next = ln->ln_next;
/* XXX: used for the DELAY case only: */
ICMP6_DST_UNREACH_ADDR, 0);
ln->ln_hold = NULL;
}
- nd6_free(rt);
+ next = nd6_free(rt);
}
break;
case ND6_LLINFO_REACHABLE:
- if (ln->ln_expire)
+ if (ln->ln_expire) {
ln->ln_state = ND6_LLINFO_STALE;
+ ln->ln_expire = time_second + nd6_gctimer;
+ }
break;
- /*
- * ND6_LLINFO_STALE state requires nothing for timer
- * routine.
- */
+
+ case ND6_LLINFO_STALE:
+ /* Garbage Collection(RFC 2461 5.3) */
+ if (ln->ln_expire)
+ next = nd6_free(rt);
+ break;
+
case ND6_LLINFO_DELAY:
if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) {
/* We need NUD */
nd6_ns_output(ifp, &dst->sin6_addr,
&dst->sin6_addr,
ln, 0);
- }
- else
+ } else {
ln->ln_state = ND6_LLINFO_STALE; /* XXX */
+ ln->ln_expire = time_second + nd6_gctimer;
+ }
break;
case ND6_LLINFO_PROBE:
if (ln->ln_asked < nd6_umaxtries) {
nd6_ns_output(ifp, &dst->sin6_addr,
&dst->sin6_addr, ln, 0);
} else {
- nd6_free(rt);
+ next = nd6_free(rt);
}
break;
- case ND6_LLINFO_WAITDELETE:
- nd6_free(rt);
- break;
}
ln = next;
}
- /* expire */
+ /* expire default router list */
dr = TAILQ_FIRST(&nd_defrouter);
while (dr) {
if (dr->expire && dr->expire < time_second) {
defrtrlist_del(dr);
dr = t;
} else {
-#if MIP6
- if (mip6_expired_defrouter_hook)
- (*mip6_expired_defrouter_hook)(dr);
-#endif /* MIP6 */
dr = TAILQ_NEXT(dr, dr_entry);
}
}
- pr = nd_prefix.lh_first;
- while (pr) {
- struct in6_ifaddr *ia6;
- struct in6_addrlifetime *lt6;
- if (IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr))
- ia6 = NULL;
- else
- ia6 = in6ifa_ifpwithaddr(pr->ndpr_ifp, &pr->ndpr_addr);
-
- if (ia6) {
- /* check address lifetime */
- lt6 = &ia6->ia6_lifetime;
- if (lt6->ia6t_preferred && lt6->ia6t_preferred < time_second)
- ia6->ia6_flags |= IN6_IFF_DEPRECATED;
- if (lt6->ia6t_expire && lt6->ia6t_expire < time_second) {
- if (!IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr))
- in6_ifdel(pr->ndpr_ifp, &pr->ndpr_addr);
- /* xxx ND_OPT_PI_FLAG_ONLINK processing */
+ /*
+ * expire interface addresses.
+ * in the past the loop was inside prefix expiry processing.
+ * However, from a stricter speci-confrmance standpoint, we should
+ * rather separate address lifetimes and prefix lifetimes.
+ */
+ addrloop:
+ for (ia6 = in6_ifaddr; ia6; ia6 = nia6) {
+ nia6 = ia6->ia_next;
+ /* check address lifetime */
+ lt6 = &ia6->ia6_lifetime;
+ if (IFA6_IS_INVALID(ia6)) {
+ int regen = 0;
+
+ /*
+ * If the expiring address is temporary, try
+ * regenerating a new one. This would be useful when
+ * we suspended a laptop PC, then turned on after a
+ * period that could invalidate all temporary
+ * addresses. Although we may have to restart the
+ * loop (see below), it must be after purging the
+ * address. Otherwise, we'd see an infinite loop of
+ * regeneration.
+ */
+ if (ip6_use_tempaddr &&
+ (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) {
+ if (regen_tmpaddr(ia6) == 0)
+ regen = 1;
+ }
+
+ in6_purgeaddr(&ia6->ia_ifa);
+
+ if (regen)
+ goto addrloop; /* XXX: see below */
+ } else if (IFA6_IS_DEPRECATED(ia6)) {
+ int oldflags = ia6->ia6_flags;
+
+ ia6->ia6_flags |= IN6_IFF_DEPRECATED;
+
+ /*
+ * If a temporary address has just become deprecated,
+ * regenerate a new one if possible.
+ */
+ if (ip6_use_tempaddr &&
+ (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
+ (oldflags & IN6_IFF_DEPRECATED) == 0) {
+
+ if (regen_tmpaddr(ia6) == 0) {
+ /*
+ * A new temporary address is
+ * generated.
+ * XXX: this means the address chain
+ * has changed while we are still in
+ * the loop. Although the change
+ * would not cause disaster (because
+ * it's not an addition, but a
+ * deletion,) we'd rather restart the
+ * loop just for safety. Or does this
+ * significantly reduce performance??
+ */
+ goto addrloop;
+ }
}
+ } else if (IFA6_IS_DEPRECATED(ia6)) {
+ /*
+ * A new RA might have made a deprecated address
+ * preferred.
+ */
+ ia6->ia6_flags &= ~IN6_IFF_DEPRECATED;
}
+ }
+ /* expire prefix list */
+ pr = nd_prefix.lh_first;
+ while (pr) {
/*
* check prefix lifetime.
* since pltime is just for autoconf, pltime processing for
* can use the old prefix information to validate the
* next prefix information to come. See prelist_update()
* for actual validation.
+ *
+ * I don't think such an offset is necessary.
+ * (jinmei@kame.net, 20010130).
*/
- if (pr->ndpr_expire
- && pr->ndpr_expire + NDPR_KEEP_EXPIRED < time_second) {
+ if (pr->ndpr_expire && pr->ndpr_expire < time_second) {
struct nd_prefix *t;
t = pr->ndpr_next;
/*
* address expiration and prefix expiration are
- * separate. NEVER perform in6_ifdel here.
+ * separate. NEVER perform in6_purgeaddr here.
*/
prelist_remove(pr);
splx(s);
}
+static int
+regen_tmpaddr(ia6)
+ struct in6_ifaddr *ia6; /* deprecated/invalidated temporary address */
+{
+ struct ifaddr *ifa;
+ struct ifnet *ifp;
+ struct in6_ifaddr *public_ifa6 = NULL;
+
+ ifp = ia6->ia_ifa.ifa_ifp;
+ for (ifa = ifp->if_addrlist.tqh_first; ifa;
+ ifa = ifa->ifa_list.tqe_next)
+ {
+ struct in6_ifaddr *it6;
+
+ if (ifa->ifa_addr->sa_family != AF_INET6)
+ continue;
+
+ it6 = (struct in6_ifaddr *)ifa;
+
+ /* ignore no autoconf addresses. */
+ if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0)
+ continue;
+
+ /* ignore autoconf addresses with different prefixes. */
+ if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr)
+ continue;
+
+ /*
+ * Now we are looking at an autoconf address with the same
+ * prefix as ours. If the address is temporary and is still
+ * preferred, do not create another one. It would be rare, but
+ * could happen, for example, when we resume a laptop PC after
+ * a long period.
+ */
+ if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
+ !IFA6_IS_DEPRECATED(it6)) {
+ public_ifa6 = NULL;
+ break;
+ }
+
+ /*
+ * This is a public autoconf address that has the same prefix
+ * as ours. If it is preferred, keep it. We can't break the
+ * loop here, because there may be a still-preferred temporary
+ * address with the prefix.
+ */
+ if (!IFA6_IS_DEPRECATED(it6))
+ public_ifa6 = it6;
+ }
+
+ if (public_ifa6 != NULL) {
+ int e;
+
+ if ((e = in6_tmpifadd(public_ifa6, 0)) != 0) {
+ log(LOG_NOTICE, "regen_tmpaddr: failed to create a new"
+ " tmp addr,errno=%d\n", e);
+ return(-1);
+ }
+ return(0);
+ }
+
+ return(-1);
+}
+
/*
* Nuke neighbor cache/prefix/default router management table, right before
* ifp goes away.
for (pr = nd_prefix.lh_first; pr; pr = npr) {
npr = pr->ndpr_next;
if (pr->ndpr_ifp == ifp) {
- if (!IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr))
- in6_ifdel(pr->ndpr_ifp, &pr->ndpr_addr);
+ /*
+ * Previously, pr->ndpr_addr is removed as well,
+ * but I strongly believe we don't have to do it.
+ * nd6_purge() is only called from in6_ifdetach(),
+ * which removes all the associated interface addresses
+ * by itself.
+ * (jinmei@kame.net 20010129)
+ */
prelist_remove(pr);
}
}
if (nd6_defifindex == ifp->if_index)
nd6_setdefaultiface(0);
- /* refresh default router list */
- bzero(&drany, sizeof(drany));
- defrouter_delreq(&drany, 0);
- defrouter_select();
+ if (!ip6_forwarding && ip6_accept_rtadv) { /* XXX: too restrictive? */
+ /* refresh default router list */
+ bzero(&drany, sizeof(drany));
+ defrouter_delreq(&drany, 0);
+ defrouter_select();
+ }
/*
* Nuke neighbor cache entries for the ifp.
rt->rt_gateway->sa_family == AF_LINK) {
sdl = (struct sockaddr_dl *)rt->rt_gateway;
if (sdl->sdl_index == ifp->if_index)
- nd6_free(rt);
- }
- ln = nln;
- }
-
- /*
- * Neighbor cache entry for interface route will be retained
- * with ND6_LLINFO_WAITDELETE state, by nd6_free(). Nuke it.
- */
- ln = llinfo_nd6.ln_next;
- while (ln && ln != &llinfo_nd6) {
- struct rtentry *rt;
- struct sockaddr_dl *sdl;
-
- nln = ln->ln_next;
- rt = ln->ln_rt;
- if (rt && rt->rt_gateway &&
- rt->rt_gateway->sa_family == AF_LINK) {
- sdl = (struct sockaddr_dl *)rt->rt_gateway;
- if (sdl->sdl_index == ifp->if_index) {
- rtrequest(RTM_DELETE, rt_key(rt),
- (struct sockaddr *)0, rt_mask(rt), 0,
- (struct rtentry **)0);
- }
+ nln = nd6_free(rt);
}
ln = nln;
}
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_family = AF_INET6;
sin6.sin6_addr = *addr6;
- rt = rtalloc1((struct sockaddr *)&sin6, create
-#if __FreeBSD__ || defined (__APPLE__)
- , 0UL
-#endif /*__FreeBSD__*/
- );
+#if SCOPEDROUTING
+ sin6.sin6_scope_id = in6_addr2scopeid(ifp, addr6);
+#endif
+ rt = rtalloc1((struct sockaddr *)&sin6, create, 0UL);
if (rt && (rt->rt_flags & RTF_LLINFO) == 0) {
/*
* This is the case for the default route.
* interface route.
*/
if (create) {
- RTFREE(rt);
+ rtfree(rt);
rt = 0;
}
}
(struct llinfo_nd6 *)rt->rt_llinfo;
ln->ln_state = ND6_LLINFO_NOSTATE;
}
- }
- else
+ } else
return(NULL);
}
- rt->rt_refcnt--;
+ rtunref(rt);
/*
* Validation for the entry.
* XXX: we can't use rt->rt_ifp to check for the interface, since
*/
int
nd6_is_addr_neighbor(addr, ifp)
- struct in6_addr *addr;
+ struct sockaddr_in6 *addr;
struct ifnet *ifp;
{
- register struct ifaddr *ifa;
+ struct ifaddr *ifa;
int i;
#define IFADDR6(a) ((((struct in6_ifaddr *)(a))->ia_addr).sin6_addr)
#define IFMASK6(a) ((((struct in6_ifaddr *)(a))->ia_prefixmask).sin6_addr)
- /* A link-local address is always a neighbor. */
- if (IN6_IS_ADDR_LINKLOCAL(addr))
+ /*
+ * A link-local address is always a neighbor.
+ * XXX: we should use the sin6_scope_id field rather than the embedded
+ * interface index.
+ */
+ if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr) &&
+ ntohs(*(u_int16_t *)&addr->sin6_addr.s6_addr[2]) == ifp->if_index)
return(1);
/*
* If the address matches one of our addresses,
* it should be a neighbor.
*/
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
-#else
for (ifa = ifp->if_addrlist.tqh_first;
ifa;
ifa = ifa->ifa_list.tqe_next)
-#endif
{
if (ifa->ifa_addr->sa_family != AF_INET6)
next: continue;
for (i = 0; i < 4; i++) {
- if ((IFADDR6(ifa).s6_addr32[i] ^ addr->s6_addr32[i]) &
+ if ((IFADDR6(ifa).s6_addr32[i] ^
+ addr->sin6_addr.s6_addr32[i]) &
IFMASK6(ifa).s6_addr32[i])
goto next;
}
* Even if the address matches none of our addresses, it might be
* in the neighbor cache.
*/
- if (nd6_lookup(addr, 0, ifp))
+ if (nd6_lookup(&addr->sin6_addr, 0, ifp))
return(1);
return(0);
/*
* Free an nd6 llinfo entry.
*/
-void
+struct llinfo_nd6 *
nd6_free(rt)
struct rtentry *rt;
{
- struct llinfo_nd6 *ln = (struct llinfo_nd6 *)rt->rt_llinfo;
- struct sockaddr_dl *sdl;
+ struct llinfo_nd6 *ln = (struct llinfo_nd6 *)rt->rt_llinfo, *next;
struct in6_addr in6 = ((struct sockaddr_in6 *)rt_key(rt))->sin6_addr;
struct nd_defrouter *dr;
/*
- * Clear all destination cache entries for the neighbor.
- * XXX: is it better to restrict this to hosts?
+ * we used to have pfctlinput(PRC_HOSTDEAD) here.
+ * even though it is not harmful, it was not really necessary.
*/
- pfctlinput(PRC_HOSTDEAD, rt_key(rt));
if (!ip6_forwarding && ip6_accept_rtadv) { /* XXX: too restrictive? */
int s;
-#ifdef __NetBSD__
- s = splsoftnet();
-#else
s = splnet();
-#endif
dr = defrouter_lookup(&((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
rt->rt_ifp);
+
if (ln->ln_router || dr) {
/*
* rt6_flush must be called whether or not the neighbor
*/
ln->ln_state = ND6_LLINFO_INCOMPLETE;
+ /*
+ * Since defrouter_select() does not affect the
+ * on-link determination and MIP6 needs the check
+ * before the default router selection, we perform
+ * the check now.
+ */
+ pfxlist_onlink_check();
+
if (dr == TAILQ_FIRST(&nd_defrouter)) {
/*
* It is used as the current default router,
defrouter_select();
}
- pfxlist_onlink_check();
}
splx(s);
}
- if (rt->rt_refcnt > 0 && (sdl = SDL(rt->rt_gateway)) &&
- sdl->sdl_family == AF_LINK) {
- sdl->sdl_alen = 0;
- ln->ln_state = ND6_LLINFO_WAITDELETE;
- ln->ln_asked = 0;
- rt->rt_flags &= ~RTF_REJECT;
- return;
- }
+ /*
+ * Before deleting the entry, remember the next entry as the
+ * return value. We need this because pfxlist_onlink_check() above
+ * might have freed other entries (particularly the old next entry) as
+ * a side effect (XXX).
+ */
+ next = ln->ln_next;
+ /*
+ * Detach the route from the routing tree and the list of neighbor
+ * caches, and disable the route entry not to be used in already
+ * cached routes.
+ */
rtrequest(RTM_DELETE, rt_key(rt), (struct sockaddr *)0,
rt_mask(rt), 0, (struct rtentry **)0);
+
+ return(next);
}
/*
* XXX cost-effective metods?
*/
void
-nd6_nud_hint(rt, dst6)
+nd6_nud_hint(rt, dst6, force)
struct rtentry *rt;
struct in6_addr *dst6;
+ int force;
{
struct llinfo_nd6 *ln;
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__)
- long time_second = time.tv_sec;
-#endif
/*
* If the caller specified "rt", use that. Otherwise, resolve the
return;
}
- if ((rt->rt_flags & RTF_GATEWAY)
- || (rt->rt_flags & RTF_LLINFO) == 0
- || !rt->rt_llinfo
- || !rt->rt_gateway
- || rt->rt_gateway->sa_family != AF_LINK) {
+ if ((rt->rt_flags & RTF_GATEWAY) != 0 ||
+ (rt->rt_flags & RTF_LLINFO) == 0 ||
+ !rt->rt_llinfo || !rt->rt_gateway ||
+ rt->rt_gateway->sa_family != AF_LINK) {
/* This is not a host route. */
return;
}
if (ln->ln_state < ND6_LLINFO_REACHABLE)
return;
- ln->ln_state = ND6_LLINFO_REACHABLE;
- if (ln->ln_expire && nd_ifinfo)
- ln->ln_expire = time_second +
- (rt->rt_ifp ? nd_ifinfo[rt->rt_ifp->if_index].reachable : 0) ;
-}
-
-#if OLDIP6OUTPUT
-/*
- * Resolve an IP6 address into an ethernet address. If success,
- * desten is filled in. If there is no entry in ndptab,
- * set one up and multicast a solicitation for the IP6 address.
- * Hold onto this mbuf and resend it once the address
- * is finally resolved. A return value of 1 indicates
- * that desten has been filled in and the packet should be sent
- * normally; a 0 return indicates that the packet has been
- * taken over here, either now or for later transmission.
- */
-int
-nd6_resolve(ifp, rt, m, dst, desten)
- struct ifnet *ifp;
- struct rtentry *rt;
- struct mbuf *m;
- struct sockaddr *dst;
- u_char *desten;
-{
- struct llinfo_nd6 *ln = (struct llinfo_nd6 *)NULL;
- struct sockaddr_dl *sdl;
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__)
- long time_second = time.tv_sec;
-#endif
-
- if (m->m_flags & M_MCAST) {
- switch (ifp->if_type) {
- case IFT_ETHER:
- case IFT_FDDI:
- ETHER_MAP_IPV6_MULTICAST(&SIN6(dst)->sin6_addr,
- desten);
- return(1);
- break;
- case IFT_ARCNET:
- *desten = 0;
- return(1);
- break;
- default:
- return(0);
- }
- }
- if (rt && (rt->rt_flags & RTF_LLINFO) != 0)
- ln = (struct llinfo_nd6 *)rt->rt_llinfo;
- else {
- if ((rt = nd6_lookup(&(SIN6(dst)->sin6_addr), 1, ifp)) != NULL)
- ln = (struct llinfo_nd6 *)rt->rt_llinfo;
- }
- if (!ln || !rt) {
- log(LOG_DEBUG, "nd6_resolve: can't allocate llinfo for %s\n",
- ip6_sprintf(&(SIN6(dst)->sin6_addr)));
- m_freem(m);
- return(0);
- }
- sdl = SDL(rt->rt_gateway);
/*
- * Ckeck the address family and length is valid, the address
- * is resolved; otherwise, try to resolve.
+ * if we get upper-layer reachability confirmation many times,
+ * it is possible we have false information.
*/
- if (ln->ln_state >= ND6_LLINFO_REACHABLE
- && sdl->sdl_family == AF_LINK
- && sdl->sdl_alen != 0) {
- bcopy(LLADDR(sdl), desten, sdl->sdl_alen);
- if (ln->ln_state == ND6_LLINFO_STALE) {
- ln->ln_asked = 0;
- ln->ln_state = ND6_LLINFO_DELAY;
- ln->ln_expire = time_second + nd6_delay;
- }
- return(1);
- }
- /*
- * There is an ndp entry, but no ethernet address
- * response yet. Replace the held mbuf with this
- * latest one.
- *
- * XXX Does the code conform to rate-limiting rule?
- * (RFC 2461 7.2.2)
- */
- if (ln->ln_state == ND6_LLINFO_WAITDELETE ||
- ln->ln_state == ND6_LLINFO_NOSTATE)
- ln->ln_state = ND6_LLINFO_INCOMPLETE;
- if (ln->ln_hold)
- m_freem(ln->ln_hold);
- ln->ln_hold = m;
- if (ln->ln_expire) {
- rt->rt_flags &= ~RTF_REJECT;
- if (ln->ln_asked < nd6_mmaxtries &&
- ln->ln_expire < time_second) {
- ln->ln_asked++;
- ln->ln_expire = time_second +
- nd_ifinfo[ifp->if_index].retrans / 1000;
- nd6_ns_output(ifp, NULL, &(SIN6(dst)->sin6_addr),
- ln, 0);
- }
+ if (!force) {
+ ln->ln_byhint++;
+ if (ln->ln_byhint > nd6_maxnudhint)
+ return;
}
- return(0);
+
+ ln->ln_state = ND6_LLINFO_REACHABLE;
+ if (ln->ln_expire)
+ ln->ln_expire = time_second +
+ nd_ifinfo[rt->rt_ifp->if_index].reachable;
}
-#endif /* OLDIP6OUTPUT */
void
-#if defined(__bsdi__) && _BSDI_VERSION >= 199802
-nd6_rtrequest(req, rt, info)
- int req;
- struct rtentry *rt;
- struct rt_addrinfo *info; /* xxx unused */
-#else
nd6_rtrequest(req, rt, sa)
int req;
struct rtentry *rt;
struct sockaddr *sa; /* xxx unused */
-#endif
{
struct sockaddr *gate = rt->rt_gateway;
struct llinfo_nd6 *ln = (struct llinfo_nd6 *)rt->rt_llinfo;
static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
struct ifnet *ifp = rt->rt_ifp;
struct ifaddr *ifa;
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__)
- long time_second = time.tv_sec;
-#endif
if (rt->rt_flags & RTF_GATEWAY)
return;
+ if (nd6_need_cache(ifp) == 0 && (rt->rt_flags & RTF_HOST) == 0) {
+ /*
+ * This is probably an interface direct route for a link
+ * which does not need neighbor caches (e.g. fe80::%lo0/64).
+ * We do not need special treatment below for such a route.
+ * Moreover, the RTF_LLINFO flag which would be set below
+ * would annoy the ndp(8) command.
+ */
+ return;
+ }
+
switch (req) {
case RTM_ADD:
/*
ln->ln_expire = time_second;
#if 1
if (ln && ln->ln_expire == 0) {
- /* cludge for desktops */
+ /* kludge for desktops */
#if 0
printf("nd6_request: time.tv_sec is zero; "
"treat it as 1\n");
* (7.2.6 paragraph 4), however, it also says that we
* SHOULD provide a mechanism to prevent multicast NA storm.
* we don't have anything like it right now.
- * note that the mechanism need a mutual agreement
+ * note that the mechanism needs a mutual agreement
* between proxies, which means that we need to implement
- * a new protocol, or new kludge.
- * - from RFC2461 6.2.4, host MUST NOT send unsolicited NA.
+ * a new protocol, or a new kludge.
+ * - from RFC2461 6.2.4, host MUST NOT send an unsolicited NA.
* we need to check ip6forwarding before sending it.
* (or should we allow proxy ND configuration only for
* routers? there's no mention about proxy ND from hosts)
#endif
/* FALLTHROUGH */
case RTM_RESOLVE:
- if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
+ if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) {
/*
* Address resolution isn't necessary for a point to
* point link, so we can skip this test for a p2p link.
if (gate->sa_family != AF_LINK ||
gate->sa_len < sizeof(null_sdl)) {
log(LOG_DEBUG,
- "nd6_rtrequest: bad gateway value\n");
+ "nd6_rtrequest: bad gateway value: %s\n",
+ if_name(ifp));
break;
}
SDL(gate)->sdl_type = ifp->if_type;
* which is specified by ndp command.
*/
ln->ln_state = ND6_LLINFO_REACHABLE;
+ ln->ln_byhint = 0;
} else {
/*
* When req == RTM_RESOLVE, rt is created and
caddr_t macp = nd6_ifptomac(ifp);
ln->ln_expire = 0;
ln->ln_state = ND6_LLINFO_REACHABLE;
+ ln->ln_byhint = 0;
if (macp) {
Bcopy(macp, LLADDR(SDL(gate)), ifp->if_addrlen);
SDL(gate)->sdl_alen = ifp->if_addrlen;
}
if (nd6_useloopback) {
-#ifdef __bsdi__
-#if _BSDI_VERSION >= 199802
- extern struct ifnet *loifp;
- rt->rt_ifp = loifp; /*XXX*/
-#else
- extern struct ifnet loif;
- rt->rt_ifp = &loif; /*XXX*/
-#endif
-#else /* non-bsdi */
rt->rt_ifp = &loif[0]; /*XXX*/
-#endif
/*
* Make sure rt_ifa be equal to the ifaddr
* corresponding to the address.
* of the loopback address.
*/
if (ifa != rt->rt_ifa) {
- rt->rt_ifa->ifa_refcnt--;
- ifa->ifa_refcnt++;
- rt->rt_ifa = ifa;
+ rtsetifa(rt, ifa);
}
}
} else if (rt->rt_flags & RTF_ANNOUNCE) {
ln->ln_expire = 0;
ln->ln_state = ND6_LLINFO_REACHABLE;
+ ln->ln_byhint = 0;
/* join solicited node multicast for proxy ND */
if (ifp->if_flags & IFF_MULTICAST) {
llsol.s6_addr32[2] = htonl(1);
llsol.s6_addr8[12] = 0xff;
- (void)in6_addmulti(&llsol, ifp, &error);
- if (error)
- printf(
-"nd6_rtrequest: could not join solicited node multicast (errno=%d)\n", error);
+ if (!in6_addmulti(&llsol, ifp, &error)) {
+ nd6log((LOG_ERR, "%s: failed to join "
+ "%s (errno=%d)\n", if_name(ifp),
+ ip6_sprintf(&llsol), error));
+ }
}
}
break;
}
}
-void
-#if defined(__bsdi__) && _BSDI_VERSION >= 199802
-nd6_p2p_rtrequest(req, rt, info)
- int req;
- struct rtentry *rt;
- struct rt_addrinfo *info; /* xxx unused */
-#else
-nd6_p2p_rtrequest(req, rt, sa)
- int req;
- struct rtentry *rt;
- struct sockaddr *sa; /* xxx unused */
-#endif
-{
- struct sockaddr *gate = rt->rt_gateway;
- static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
- struct ifnet *ifp = rt->rt_ifp;
- struct ifaddr *ifa;
-
- if (rt->rt_flags & RTF_GATEWAY)
- return;
-
- switch (req) {
- case RTM_ADD:
- /*
- * There is no backward compatibility :)
- *
- * if ((rt->rt_flags & RTF_HOST) == 0 &&
- * SIN(rt_mask(rt))->sin_addr.s_addr != 0xffffffff)
- * rt->rt_flags |= RTF_CLONING;
- */
- if (rt->rt_flags & RTF_CLONING) {
- /*
- * Case 1: This route should come from
- * a route to interface.
- */
- rt_setgate(rt, rt_key(rt),
- (struct sockaddr *)&null_sdl);
- gate = rt->rt_gateway;
- SDL(gate)->sdl_type = ifp->if_type;
- SDL(gate)->sdl_index = ifp->if_index;
- break;
- }
- /* Announce a new entry if requested. */
- if (rt->rt_flags & RTF_ANNOUNCE)
- nd6_na_output(ifp,
- &SIN6(rt_key(rt))->sin6_addr,
- &SIN6(rt_key(rt))->sin6_addr,
- ip6_forwarding ? ND_NA_FLAG_ROUTER : 0,
- 1, NULL);
- /* FALLTHROUGH */
- case RTM_RESOLVE:
- /*
- * check if rt_key(rt) is one of my address assigned
- * to the interface.
- */
- ifa = (struct ifaddr *)in6ifa_ifpwithaddr(rt->rt_ifp,
- &SIN6(rt_key(rt))->sin6_addr);
- if (ifa) {
- if (nd6_useloopback) {
-#ifdef __bsdi__
-#if _BSDI_VERSION >= 199802
- extern struct ifnet *loifp;
- rt->rt_ifp = loifp; /*XXX*/
-#else
- extern struct ifnet loif;
- rt->rt_ifp = &loif; /*XXX*/
-#endif
-#else
- rt->rt_ifp = &loif[0]; /*XXX*/
-#endif /*__bsdi__*/
- }
- }
- break;
- }
-}
-
int
nd6_ioctl(cmd, data, ifp)
u_long cmd;
switch (cmd) {
case SIOCGDRLST_IN6:
+ /*
+ * obsolete API, use sysctl under net.inet6.icmp6
+ */
bzero(drl, sizeof(*drl));
-#ifdef __NetBSD__
- s = splsoftnet();
-#else
s = splnet();
-#endif
dr = TAILQ_FIRST(&nd_defrouter);
while (dr && i < DRLSTSIZ) {
drl->defrouter[i].rtaddr = dr->rtaddr;
if (IN6_IS_ADDR_LINKLOCAL(&drl->defrouter[i].rtaddr)) {
/* XXX: need to this hack for KAME stack */
drl->defrouter[i].rtaddr.s6_addr16[1] = 0;
- }
- else
+ } else
log(LOG_ERR,
"default router list contains a "
"non-linklocal address(%s)\n",
splx(s);
break;
case SIOCGPRLST_IN6:
+ /*
+ * obsolete API, use sysctl under net.inet6.icmp6
+ */
/*
* XXX meaning of fields, especialy "raflags", is very
* differnet between RA prefix list and RR/static prefix list.
* how about separating ioctls into two?
*/
bzero(prl, sizeof(*prl));
-#ifdef __NetBSD__
- s = splsoftnet();
-#else
s = splnet();
-#endif
pr = nd_prefix.lh_first;
while (pr && i < PRLSTSIZ) {
struct nd_pfxrouter *pfr;
int j;
- prl->prefix[i].prefix = pr->ndpr_prefix.sin6_addr;
+ (void)in6_embedscope(&prl->prefix[i].prefix,
+ &pr->ndpr_prefix, NULL, NULL);
prl->prefix[i].raflags = pr->ndpr_raf;
prl->prefix[i].prefixlen = pr->ndpr_plen;
prl->prefix[i].vltime = pr->ndpr_vltime;
pfr = pr->ndpr_advrtrs.lh_first;
j = 0;
- while(pfr) {
+ while (pfr) {
if (j < DRLSTSIZ) {
#define RTRADDR prl->prefix[i].advrtr[j]
RTRADDR = pfr->router->rtaddr;
if (IN6_IS_ADDR_LINKLOCAL(&RTRADDR)) {
/* XXX: hack for KAME */
RTRADDR.s6_addr16[1] = 0;
- }
- else
+ } else
log(LOG_ERR,
"a router(%s) advertises "
"a prefix with "
rpp = LIST_NEXT(rpp, rp_entry)) {
if (i >= PRLSTSIZ)
break;
- prl->prefix[i].prefix = rpp->rp_prefix.sin6_addr;
+ (void)in6_embedscope(&prl->prefix[i].prefix,
+ &pr->ndpr_prefix, NULL, NULL);
prl->prefix[i].raflags = rpp->rp_raf;
prl->prefix[i].prefixlen = rpp->rp_plen;
prl->prefix[i].vltime = rpp->rp_vltime;
}
splx(s);
+ break;
+ case OSIOCGIFINFO_IN6:
+ if (!nd_ifinfo || i >= nd_ifinfo_indexlim) {
+ error = EINVAL;
+ break;
+ }
+ ndi->ndi.linkmtu = nd_ifinfo[ifp->if_index].linkmtu;
+ ndi->ndi.maxmtu = nd_ifinfo[ifp->if_index].maxmtu;
+ ndi->ndi.basereachable =
+ nd_ifinfo[ifp->if_index].basereachable;
+ ndi->ndi.reachable = nd_ifinfo[ifp->if_index].reachable;
+ ndi->ndi.retrans = nd_ifinfo[ifp->if_index].retrans;
+ ndi->ndi.flags = nd_ifinfo[ifp->if_index].flags;
+ ndi->ndi.recalctm = nd_ifinfo[ifp->if_index].recalctm;
+ ndi->ndi.chlim = nd_ifinfo[ifp->if_index].chlim;
+ ndi->ndi.receivedra = nd_ifinfo[ifp->if_index].receivedra;
break;
case SIOCGIFINFO_IN6:
+ if (!nd_ifinfo || i >= nd_ifinfo_indexlim) {
+ error = EINVAL;
+ break;
+ }
ndi->ndi = nd_ifinfo[ifp->if_index];
break;
case SIOCSIFINFO_FLAGS:
/* XXX: almost all other fields of ndi->ndi is unused */
+ if (!nd_ifinfo || i >= nd_ifinfo_indexlim) {
+ error = EINVAL;
+ break;
+ }
nd_ifinfo[ifp->if_index].flags = ndi->ndi.flags;
break;
case SIOCSNDFLUSH_IN6: /* XXX: the ioctl name is confusing... */
/* flush all the prefix advertised by routers */
struct nd_prefix *pr, *next;
-#ifdef __NetBSD__
- s = splsoftnet();
-#else
s = splnet();
-#endif
for (pr = nd_prefix.lh_first; pr; pr = next) {
+ struct in6_ifaddr *ia, *ia_next;
+
next = pr->ndpr_next;
- if (!IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr))
- in6_ifdel(pr->ndpr_ifp, &pr->ndpr_addr);
+
+ if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr))
+ continue; /* XXX */
+
+ /* do we really have to remove addresses as well? */
+ for (ia = in6_ifaddr; ia; ia = ia_next) {
+ /* ia might be removed. keep the next ptr. */
+ ia_next = ia->ia_next;
+
+ if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0)
+ continue;
+
+ if (ia->ia6_ndpr == pr)
+ in6_purgeaddr(&ia->ia_ifa);
+ }
prelist_remove(pr);
}
splx(s);
/* flush all the default routers */
struct nd_defrouter *dr, *next;
-#ifdef __NetBSD__
- s = splsoftnet();
-#else
s = splnet();
-#endif
if ((dr = TAILQ_FIRST(&nd_defrouter)) != NULL) {
/*
* The first entry of the list may be stored in
*idp = htons(ifp->if_index);
}
-#ifdef __NetBSD__
- s = splsoftnet();
-#else
s = splnet();
-#endif
if ((rt = nd6_lookup(&nb_addr, 0, ifp)) == NULL) {
error = EINVAL;
splx(s);
int olladdr;
int llchange;
int newstate = 0;
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__)
- long time_second = time.tv_sec;
-#endif
if (!ifp)
panic("ifp == NULL in nd6_cache_lladdr");
rt = nd6_lookup(from, 1, ifp);
is_newentry = 1;
- } else
+ } else {
+ /* do nothing if static ndp is set */
+ if (rt->rt_flags & RTF_STATIC)
+ return NULL;
is_newentry = 0;
+ }
if (!rt)
return NULL;
if ((rt->rt_flags & (RTF_GATEWAY | RTF_LLINFO)) != RTF_LLINFO) {
fail:
- nd6_free(rt);
+ (void)nd6_free(rt);
return NULL;
}
ln = (struct llinfo_nd6 *)rt->rt_llinfo;
ln->ln_state = newstate;
if (ln->ln_state == ND6_LLINFO_STALE) {
- rt->rt_flags &= ~RTF_REJECT;
+ /*
+ * XXX: since nd6_output() below will cause
+ * state tansition to DELAY and reset the timer,
+ * we must set the timer now, although it is actually
+ * meaningless.
+ */
+ ln->ln_expire = time_second + nd6_gctimer;
+
if (ln->ln_hold) {
-#if OLDIP6OUTPUT
- (*ifp->if_output)(ifp, ln->ln_hold,
- rt_key(rt), rt);
-#else
- nd6_output(ifp, ln->ln_hold,
+ /*
+ * we assume ifp is not a p2p here, so just
+ * set the 2nd argument as the 1st one.
+ */
+ nd6_output(ifp, ifp, ln->ln_hold,
(struct sockaddr_in6 *)rt_key(rt),
rt);
-#endif
- ln->ln_hold = 0;
+ ln->ln_hold = NULL;
}
} else if (ln->ln_state == ND6_LLINFO_INCOMPLETE) {
/* probe right away */
* If the icmp is a redirect to a better router, always set the
* is_router flag. Otherwise, if the entry is newly created,
* clear the flag. [RFC 2461, sec 8.3]
- *
*/
if (code == ND_REDIRECT_ROUTER)
ln->ln_router = 1;
break;
}
+ /*
+ * When the link-layer address of a router changes, select the
+ * best router again. In particular, when the neighbor entry is newly
+ * created, it might affect the selection policy.
+ * Question: can we restrict the first condition to the "is_newentry"
+ * case?
+ * XXX: when we hear an RA from a new router with the link-layer
+ * address option, defrouter_select() is called twice, since
+ * defrtrlist_update called the function as well. However, I believe
+ * we can compromise the overhead, since it only happens the first
+ * time.
+ * XXX: although defrouter_select() should not have a bad effect
+ * for those are not autoconfigured hosts, we explicitly avoid such
+ * cases for safety.
+ */
+ if (do_update && ln->ln_router && !ip6_forwarding && ip6_accept_rtadv)
+ defrouter_select();
+
return rt;
}
-static void
-nd6_slowtimo_funneled(ignored_arg)
- void *ignored_arg;
-{
-#ifdef __APPLE__
- boolean_t funnel_state;
- funnel_state = thread_funnel_set(network_flock, TRUE);
-#endif
- nd6_slowtimo(ignored_arg);
-#ifdef __APPLE__
- (void) thread_funnel_set(network_flock, FALSE);
-#endif
-}
static void
nd6_slowtimo(ignored_arg)
void *ignored_arg;
{
- int s;
- register int i;
- register struct nd_ifinfo *nd6if;
+ int s = splnet();
+ int i;
+ struct nd_ifinfo *nd6if;
-#ifdef __NetBSD__
- s = splsoftnet();
-#else
s = splnet();
-#endif
-
timeout(nd6_slowtimo_funneled, (caddr_t)0, ND6_SLOWTIMER_INTERVAL * hz);
for (i = 1; i < if_index + 1; i++) {
+ if (!nd_ifinfo || i >= nd_ifinfo_indexlim)
+ continue;
nd6if = &nd_ifinfo[i];
if (nd6if->basereachable && /* already initialized */
(nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) {
}
}
splx(s);
+}
+static void
+nd6_slowtimo_funneled(ignored_arg)
+ void *ignored_arg;
+{
+#ifdef __APPLE__
+ boolean_t funnel_state;
+ funnel_state = thread_funnel_set(network_flock, TRUE);
+#endif
+ nd6_slowtimo(ignored_arg);
+#ifdef __APPLE__
+ (void) thread_funnel_set(network_flock, FALSE);
+#endif
}
#define senderr(e) { error = (e); goto bad;}
int
-nd6_output(ifp, m0, dst, rt0)
- register struct ifnet *ifp;
+nd6_output(ifp, origifp, m0, dst, rt0)
+ struct ifnet *ifp;
+ struct ifnet *origifp;
struct mbuf *m0;
struct sockaddr_in6 *dst;
struct rtentry *rt0;
{
- register struct mbuf *m = m0;
- register struct rtentry *rt = rt0;
+ struct mbuf *m = m0;
+ struct rtentry *rt = rt0;
+ struct sockaddr_in6 *gw6 = NULL;
struct llinfo_nd6 *ln = NULL;
int error = 0;
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__)
- long time_second = time.tv_sec;
-#endif
if (IN6_IS_ADDR_MULTICAST(&dst->sin6_addr))
goto sendpkt;
- /*
- * XXX: we currently do not make neighbor cache on any interface
- * other than ARCnet, Ethernet, FDDI and GIF.
- *
- * draft-ietf-ngtrans-mech-04.txt says:
- * - unidirectional tunnels needs no ND
- */
- switch (ifp->if_type) {
- case IFT_ARCNET:
- case IFT_ETHER:
- case IFT_FDDI:
- case IFT_GIF: /* XXX need more cases? */
- break;
- default:
- goto sendpkt;
- }
-
- if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
- (nd_ifinfo[ifp->if_index].flags & ND6_IFF_PERFORMNUD) == 0)
+ if (nd6_need_cache(ifp) == 0)
goto sendpkt;
/*
*/
if (rt) {
if ((rt->rt_flags & RTF_UP) == 0) {
-#if __FreeBSD__ || defined (__APPLE__)
if ((rt0 = rt = rtalloc1((struct sockaddr *)dst, 1, 0UL)) !=
NULL)
-#else
- if ((rt0 = rt = rtalloc1((struct sockaddr *)dst, 1)) !=
- NULL)
-#endif
{
- rt->rt_refcnt--;
- if (rt->rt_ifp != ifp)
- return nd6_output(ifp, m0, dst, rt); /* XXX: loop care? */
+ rtunref(rt);
+ if (rt->rt_ifp != ifp) {
+ /* XXX: loop care? */
+ return nd6_output(ifp, origifp, m0,
+ dst, rt);
+ }
} else
senderr(EHOSTUNREACH);
}
+
if (rt->rt_flags & RTF_GATEWAY) {
+ gw6 = (struct sockaddr_in6 *)rt->rt_gateway;
+
+ /*
+ * We skip link-layer address resolution and NUD
+ * if the gateway is not a neighbor from ND point
+ * of view, regardless the value of the
+ * nd_ifinfo.flags.
+ * The second condition is a bit tricky: we skip
+ * if the gateway is our own address, which is
+ * sometimes used to install a route to a p2p link.
+ */
+ if (!nd6_is_addr_neighbor(gw6, ifp) ||
+ in6ifa_ifpwithaddr(ifp, &gw6->sin6_addr)) {
+ /*
+ * We allow this kind of tricky route only
+ * when the outgoing interface is p2p.
+ * XXX: we may need a more generic rule here.
+ */
+ if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
+ senderr(EHOSTUNREACH);
+
+ goto sendpkt;
+ }
+
if (rt->rt_gwroute == 0)
goto lookup;
if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
rtfree(rt); rt = rt0;
-#if __FreeBSD__ || defined (__APPLE__)
lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1, 0UL);
-#else
- lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1);
-#endif
if ((rt = rt->rt_gwroute) == 0)
senderr(EHOSTUNREACH);
-#ifdef __bsdi__
- /* the "G" test below also prevents rt == rt0 */
- if ((rt->rt_flags & RTF_GATEWAY) ||
- (rt->rt_ifp != ifp)) {
- rt->rt_refcnt--;
- rt0->rt_gwroute = 0;
- senderr(EHOSTUNREACH);
- }
-#endif
}
}
- if (rt->rt_flags & RTF_REJECT)
- senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
}
/*
if (rt && (rt->rt_flags & RTF_LLINFO) != 0)
ln = (struct llinfo_nd6 *)rt->rt_llinfo;
else {
- if ((rt = nd6_lookup(&dst->sin6_addr, 1, ifp)) != NULL)
+ /*
+ * Since nd6_is_addr_neighbor() internally calls nd6_lookup(),
+ * the condition below is not very efficient. But we believe
+ * it is tolerable, because this should be a rare case.
+ */
+ if (nd6_is_addr_neighbor(dst, ifp) &&
+ (rt = nd6_lookup(&dst->sin6_addr, 1, ifp)) != NULL)
ln = (struct llinfo_nd6 *)rt->rt_llinfo;
}
if (!ln || !rt) {
- log(LOG_DEBUG, "nd6_output: can't allocate llinfo for %s "
- "(ln=%p, rt=%p)\n",
- ip6_sprintf(&dst->sin6_addr), ln, rt);
- senderr(EIO); /* XXX: good error? */
+ if ((ifp->if_flags & IFF_POINTOPOINT) == 0 &&
+ !(nd_ifinfo[ifp->if_index].flags & ND6_IFF_PERFORMNUD)) {
+ log(LOG_DEBUG,
+ "nd6_output: can't allocate llinfo for %s "
+ "(ln=%p, rt=%p)\n",
+ ip6_sprintf(&dst->sin6_addr), ln, rt);
+ senderr(EIO); /* XXX: good error? */
+ }
+
+ goto sendpkt; /* send anyway */
}
/* We don't have to do link-layer address resolution on a p2p link. */
if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
- ln->ln_state < ND6_LLINFO_REACHABLE)
+ ln->ln_state < ND6_LLINFO_REACHABLE) {
ln->ln_state = ND6_LLINFO_STALE;
+ ln->ln_expire = time_second + nd6_gctimer;
+ }
/*
* The first time we send a packet to a neighbor whose entry is
* XXX Does the code conform to rate-limiting rule?
* (RFC 2461 7.2.2)
*/
- if (ln->ln_state == ND6_LLINFO_WAITDELETE ||
- ln->ln_state == ND6_LLINFO_NOSTATE)
+ if (ln->ln_state == ND6_LLINFO_NOSTATE)
ln->ln_state = ND6_LLINFO_INCOMPLETE;
if (ln->ln_hold)
m_freem(ln->ln_hold);
ln->ln_hold = m;
if (ln->ln_expire) {
- rt->rt_flags &= ~RTF_REJECT;
if (ln->ln_asked < nd6_mmaxtries &&
ln->ln_expire < time_second) {
ln->ln_asked++;
sendpkt:
#ifdef __APPLE__
- return (dlil_output(ifptodlt(ifp, PF_INET6), m, rt, (struct sockaddr *)dst, 0));
+
+ /* Make sure the HW checksum flags are cleaned before sending the packet */
+
+ m->m_pkthdr.rcvif = (struct ifnet *)0;
+ m->m_pkthdr.csum_data = 0;
+ m->m_pkthdr.csum_flags = 0;
+
+ if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
+ return (dlil_output(ifptodlt(origifp, PF_INET6), m, (caddr_t)rt, (struct sockaddr *)dst,0));
+ }
+
+ return (dlil_output(ifptodlt(ifp, PF_INET6), m, (caddr_t)rt, (struct sockaddr *)dst, 0));
#else
+ if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
+ return((*ifp->if_output)(origifp, m, (struct sockaddr *)dst,
+ rt));
+ }
return((*ifp->if_output)(ifp, m, (struct sockaddr *)dst, rt));
#endif
}
#undef senderr
+int
+nd6_need_cache(ifp)
+ struct ifnet *ifp;
+{
+ /*
+ * XXX: we currently do not make neighbor cache on any interface
+ * other than ARCnet, Ethernet, FDDI and GIF.
+ *
+ * RFC2893 says:
+ * - unidirectional tunnels needs no ND
+ */
+ switch (ifp->if_type) {
+ case IFT_ARCNET:
+ case IFT_ETHER:
+ case IFT_FDDI:
+ case IFT_IEEE1394:
+#if IFT_L2VLAN
+ case IFT_L2VLAN:
+#endif
+#if IFT_IEEE80211
+ case IFT_IEEE80211:
+#endif
+ case IFT_GIF: /* XXX need more cases? */
+ return(1);
+ default:
+ return(0);
+ }
+}
+
int
nd6_storelladdr(ifp, rt, m, dst, desten)
struct ifnet *ifp;
struct sockaddr *dst;
u_char *desten;
{
+ int i;
struct sockaddr_dl *sdl;
if (m->m_flags & M_MCAST) {
switch (ifp->if_type) {
case IFT_ETHER:
- case IFT_FDDI:
+ case IFT_FDDI:
+#if IFT_L2VLAN
+ case IFT_L2VLAN:
+#endif
+#if IFT_IEEE80211
+ case IFT_IEEE80211:
+#endif
ETHER_MAP_IPV6_MULTICAST(&SIN6(dst)->sin6_addr,
desten);
return(1);
- break;
+ case IFT_IEEE1394:
+ for (i = 0; i < ifp->if_addrlen; i++)
+ desten[i] = ~0;
+ return(1);
case IFT_ARCNET:
*desten = 0;
return(1);
default:
+ m_freem(m);
return(0);
}
}
- if (rt == NULL ||
- rt->rt_gateway->sa_family != AF_LINK) {
+ if (rt == NULL) {
+ /* this could happen, if we could not allocate memory */
+ m_freem(m);
+ return(0);
+ }
+ if (rt->rt_gateway->sa_family != AF_LINK) {
printf("nd6_storelladdr: something odd happens\n");
+ m_freem(m);
return(0);
}
sdl = SDL(rt->rt_gateway);
if (sdl->sdl_alen == 0) {
/* this should be impossible, but we bark here for debugging */
printf("nd6_storelladdr: sdl_alen == 0\n");
+ m_freem(m);
return(0);
}
bcopy(LLADDR(sdl), desten, sdl->sdl_alen);
return(1);
}
+#ifndef __APPLE__
+static int nd6_sysctl_drlist SYSCTL_HANDLER_ARGS;
+static int nd6_sysctl_prlist SYSCTL_HANDLER_ARGS;
+SYSCTL_DECL(_net_inet6_icmp6);
+SYSCTL_NODE(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist,
+ CTLFLAG_RD, nd6_sysctl_drlist, "");
+SYSCTL_NODE(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist,
+ CTLFLAG_RD, nd6_sysctl_prlist, "");
+
+static int
+nd6_sysctl_drlist SYSCTL_HANDLER_ARGS
+{
+ int error;
+ char buf[1024];
+ struct in6_defrouter *d, *de;
+ struct nd_defrouter *dr;
+
+ if (req->newptr)
+ return EPERM;
+ error = 0;
+
+ for (dr = TAILQ_FIRST(&nd_defrouter);
+ dr;
+ dr = TAILQ_NEXT(dr, dr_entry)) {
+ d = (struct in6_defrouter *)buf;
+ de = (struct in6_defrouter *)(buf + sizeof(buf));
+
+ if (d + 1 <= de) {
+ bzero(d, sizeof(*d));
+ d->rtaddr.sin6_family = AF_INET6;
+ d->rtaddr.sin6_len = sizeof(d->rtaddr);
+ if (in6_recoverscope(&d->rtaddr, &dr->rtaddr,
+ dr->ifp) != 0)
+ log(LOG_ERR,
+ "scope error in "
+ "default router list (%s)\n",
+ ip6_sprintf(&dr->rtaddr));
+ d->flags = dr->flags;
+ d->rtlifetime = dr->rtlifetime;
+ d->expire = dr->expire;
+ d->if_index = dr->ifp->if_index;
+ } else
+ panic("buffer too short");
+
+ error = SYSCTL_OUT(req, buf, sizeof(*d));
+ if (error)
+ break;
+ }
+ return error;
+}
+
+static int
+nd6_sysctl_prlist SYSCTL_HANDLER_ARGS
+{
+ int error;
+ char buf[1024];
+ struct in6_prefix *p, *pe;
+ struct nd_prefix *pr;
+
+ if (req->newptr)
+ return EPERM;
+ error = 0;
+
+ for (pr = nd_prefix.lh_first; pr; pr = pr->ndpr_next) {
+ u_short advrtrs;
+ size_t advance;
+ struct sockaddr_in6 *sin6, *s6;
+ struct nd_pfxrouter *pfr;
+
+ p = (struct in6_prefix *)buf;
+ pe = (struct in6_prefix *)(buf + sizeof(buf));
+
+ if (p + 1 <= pe) {
+ bzero(p, sizeof(*p));
+ sin6 = (struct sockaddr_in6 *)(p + 1);
+
+ p->prefix = pr->ndpr_prefix;
+ if (in6_recoverscope(&p->prefix,
+ &p->prefix.sin6_addr, pr->ndpr_ifp) != 0)
+ log(LOG_ERR,
+ "scope error in prefix list (%s)\n",
+ ip6_sprintf(&p->prefix.sin6_addr));
+ p->raflags = pr->ndpr_raf;
+ p->prefixlen = pr->ndpr_plen;
+ p->vltime = pr->ndpr_vltime;
+ p->pltime = pr->ndpr_pltime;
+ p->if_index = pr->ndpr_ifp->if_index;
+ p->expire = pr->ndpr_expire;
+ p->refcnt = pr->ndpr_refcnt;
+ p->flags = pr->ndpr_stateflags;
+ p->origin = PR_ORIG_RA;
+ advrtrs = 0;
+ for (pfr = pr->ndpr_advrtrs.lh_first;
+ pfr;
+ pfr = pfr->pfr_next) {
+ if ((void *)&sin6[advrtrs + 1] >
+ (void *)pe) {
+ advrtrs++;
+ continue;
+ }
+ s6 = &sin6[advrtrs];
+ bzero(s6, sizeof(*s6));
+ s6->sin6_family = AF_INET6;
+ s6->sin6_len = sizeof(*sin6);
+ if (in6_recoverscope(s6,
+ &pfr->router->rtaddr,
+ pfr->router->ifp) != 0)
+ log(LOG_ERR,
+ "scope error in "
+ "prefix list (%s)\n",
+ ip6_sprintf(&pfr->router->rtaddr));
+ advrtrs++;
+ }
+ p->advrtrs = advrtrs;
+ } else
+ panic("buffer too short");
+
+ advance = sizeof(*p) + sizeof(*sin6) * advrtrs;
+ error = SYSCTL_OUT(req, buf, advance);
+ if (error)
+ break;
+ }
+ return error;
+}
+#endif
projects / apple / xnu.git / blobdiff