/*
- * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2014 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-/* $FreeBSD: src/sys/netinet6/in6_src.c,v 1.1.2.2 2001/07/03 11:01:52 ume Exp $ */
-/* $KAME: in6_src.c,v 1.37 2001/03/29 05:34:31 itojun Exp $ */
-
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
#include <sys/sysctl.h>
#include <sys/kauth.h>
#include <sys/priv.h>
-#include <kern/lock.h>
+#include <kern/locks.h>
#include <net/if.h>
#include <net/if_types.h>
static int ip6_select_srcif_debug = 0;
SYSCTL_INT(_net_inet6_ip6, OID_AUTO, select_srcif_debug,
- CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_select_srcif_debug, 0,
- "log source interface selection debug info");
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_select_srcif_debug, 0,
+ "log source interface selection debug info");
-#define ADDR_LABEL_NOTAPP (-1)
+#define ADDR_LABEL_NOTAPP (-1)
struct in6_addrpolicy defaultaddrpolicy;
int ip6_prefer_tempaddr = 1;
#endif
static int selectroute(struct sockaddr_in6 *, struct sockaddr_in6 *,
- struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *,
- struct ifnet **, struct rtentry **, int, int, unsigned int,
- unsigned int);
+ struct ip6_pktopts *, struct ip6_moptions *, struct in6_ifaddr **,
+ struct route_in6 *, struct ifnet **, struct rtentry **, int, int,
+ struct ip6_out_args *ip6oa);
static int in6_selectif(struct sockaddr_in6 *, struct ip6_pktopts *,
- struct ip6_moptions *, struct route_in6 *ro, unsigned int,
- unsigned int, struct ifnet **);
+ struct ip6_moptions *, struct route_in6 *ro,
+ struct ip6_out_args *, struct ifnet **);
static void init_policy_queue(void);
static int add_addrsel_policyent(const struct in6_addrpolicy *);
#ifdef ENABLE_ADDRSEL
* If necessary, this function lookups the routing table and returns
* an entry to the caller for later use.
*/
-#define REPLACE(r) do {\
- if ((r) < sizeof(ip6stat.ip6s_sources_rule) / \
- sizeof(ip6stat.ip6s_sources_rule[0])) /* check for safety */ \
+#define REPLACE(r) do {\
+ if ((r) < sizeof (ip6stat.ip6s_sources_rule) / \
+ sizeof (ip6stat.ip6s_sources_rule[0])) /* check for safety */ \
ip6stat.ip6s_sources_rule[(r)]++; \
goto replace; \
-} while(0)
-#define NEXTSRC(r) do {\
- if ((r) < sizeof(ip6stat.ip6s_sources_rule) / \
- sizeof(ip6stat.ip6s_sources_rule[0])) /* check for safety */ \
+} while (0)
+#define NEXTSRC(r) do {\
+ if ((r) < sizeof (ip6stat.ip6s_sources_rule) / \
+ sizeof (ip6stat.ip6s_sources_rule[0])) /* check for safety */ \
ip6stat.ip6s_sources_rule[(r)]++; \
goto next; /* XXX: we can't use 'continue' here */ \
-} while(0)
-#define BREAK(r) do { \
- if ((r) < sizeof(ip6stat.ip6s_sources_rule) / \
- sizeof(ip6stat.ip6s_sources_rule[0])) /* check for safety */ \
+} while (0)
+#define BREAK(r) do { \
+ if ((r) < sizeof (ip6stat.ip6s_sources_rule) / \
+ sizeof (ip6stat.ip6s_sources_rule[0])) /* check for safety */ \
ip6stat.ip6s_sources_rule[(r)]++; \
goto out; /* XXX: we can't use 'break' here */ \
-} while(0)
+} while (0)
+/*
+ * Regardless of error, it will return an ifp with a reference held if the
+ * caller provides a non-NULL ifpp. The caller is responsible for checking
+ * if the returned ifp is valid and release its reference at all times.
+ */
struct in6_addr *
in6_selectsrc(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts,
struct inpcb *inp, struct route_in6 *ro,
u_int32_t odstzone;
int prefer_tempaddr;
struct ip6_moptions *mopts;
- struct timeval timenow;
- unsigned int nocell;
+ struct ip6_out_args ip6oa = { ifscope, { 0 }, IP6OAF_SELECT_SRCIF, 0 };
boolean_t islocal = FALSE;
-
- getmicrotime(&timenow);
+ uint64_t secs = net_uptime();
dst = dstsock->sin6_addr; /* make a copy for local operation */
*errorp = 0;
if (inp != NULL) {
mopts = inp->in6p_moptions;
- nocell = (inp->inp_flags & INP_NO_IFT_CELLULAR) ? 1 : 0;
+ if (INP_NO_CELLULAR(inp))
+ ip6oa.ip6oa_flags |= IP6OAF_NO_CELLULAR;
+ if (INP_NO_EXPENSIVE(inp))
+ ip6oa.ip6oa_flags |= IP6OAF_NO_EXPENSIVE;
+ if (INP_AWDL_UNRESTRICTED(inp))
+ ip6oa.ip6oa_flags |= IP6OAF_AWDL_UNRESTRICTED;
+
} else {
mopts = NULL;
- nocell = 0;
}
+ if (ip6oa.ip6oa_boundif != IFSCOPE_NONE)
+ ip6oa.ip6oa_flags |= IP6OAF_BOUND_IF;
+
/*
* If the source address is explicitly specified by the caller,
* check if the requested source address is indeed a unicast address
struct in6_ifaddr *ia6;
/* get the outgoing interface */
- if ((*errorp = in6_selectif(dstsock, opts, mopts, ro, ifscope,
- nocell, &ifp)) != 0) {
- return (NULL);
+ if ((*errorp = in6_selectif(dstsock, opts, mopts, ro, &ip6oa,
+ &ifp)) != 0) {
+ src_storage = NULL;
+ goto done;
}
/*
* the interface must be specified; otherwise, ifa_ifwithaddr()
* will fail matching the address.
*/
- bzero(&srcsock, sizeof(srcsock));
+ bzero(&srcsock, sizeof (srcsock));
srcsock.sin6_family = AF_INET6;
- srcsock.sin6_len = sizeof(srcsock);
+ srcsock.sin6_len = sizeof (srcsock);
srcsock.sin6_addr = pi->ipi6_addr;
- if (ifp) {
+ if (ifp != NULL) {
*errorp = in6_setscope(&srcsock.sin6_addr, ifp, NULL);
if (*errorp != 0) {
- ifnet_release(ifp);
- return (NULL);
+ src_storage = NULL;
+ goto done;
}
}
- ia6 = (struct in6_ifaddr *)ifa_ifwithaddr((struct sockaddr *)(&srcsock));
+ ia6 = (struct in6_ifaddr *)ifa_ifwithaddr((struct sockaddr *)
+ (&srcsock));
if (ia6 == NULL) {
*errorp = EADDRNOTAVAIL;
- if (ifp != NULL)
- ifnet_release(ifp);
- return (NULL);
+ src_storage = NULL;
+ goto done;
}
IFA_LOCK_SPIN(&ia6->ia_ifa);
if ((ia6->ia6_flags & (IN6_IFF_ANYCAST | IN6_IFF_NOTREADY)) ||
- (nocell && (ia6->ia_ifa.ifa_ifp->if_type == IFT_CELLULAR))) {
+ (inp && inp_restricted_send(inp, ia6->ia_ifa.ifa_ifp))) {
IFA_UNLOCK(&ia6->ia_ifa);
IFA_REMREF(&ia6->ia_ifa);
- *errorp = EADDRNOTAVAIL;
- if (ifp != NULL)
- ifnet_release(ifp);
- return (NULL);
+ *errorp = EHOSTUNREACH;
+ src_storage = NULL;
+ goto done;
}
*src_storage = satosin6(&ia6->ia_addr)->sin6_addr;
IFA_UNLOCK(&ia6->ia_ifa);
IFA_REMREF(&ia6->ia_ifa);
- if (ifpp != NULL) {
- /* if ifp is non-NULL, refcnt held in in6_selectif() */
- *ifpp = ifp;
- } else if (ifp != NULL) {
- ifnet_release(ifp);
- }
- return (src_storage);
+ goto done;
}
/*
* Otherwise, if the socket has already bound the source, just use it.
*/
- if (inp != NULL && !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
- return (&inp->in6p_laddr);
+ if (inp != NULL && !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
+ src_storage = &inp->in6p_laddr;
+ goto done;
+ }
/*
* If the address is not specified, choose the best one based on
*/
/* get the outgoing interface */
- if ((*errorp = in6_selectif(dstsock, opts, mopts, ro, ifscope, nocell,
- &ifp)) != 0)
- return (NULL);
+ if ((*errorp = in6_selectif(dstsock, opts, mopts, ro, &ip6oa,
+ &ifp)) != 0) {
+ src_storage = NULL;
+ goto done;
+ }
-#ifdef DIAGNOSTIC
- if (ifp == NULL) /* this should not happen */
- panic("in6_selectsrc: NULL ifp");
-#endif
*errorp = in6_setscope(&dst, ifp, &odstzone);
if (*errorp != 0) {
- if (ifp != NULL)
- ifnet_release(ifp);
- return (NULL);
+ src_storage = NULL;
+ goto done;
}
lck_rw_lock_shared(&in6_ifaddr_rwlock);
/* avoid unusable addresses */
if ((ia->ia6_flags &
- (IN6_IFF_NOTREADY | IN6_IFF_ANYCAST | IN6_IFF_DETACHED)))
+ (IN6_IFF_NOTREADY | IN6_IFF_ANYCAST | IN6_IFF_DETACHED)))
goto next;
- if (!ip6_use_deprecated && IFA6_IS_DEPRECATED(ia))
+ if (!ip6_use_deprecated && IFA6_IS_DEPRECATED(ia, secs))
+ goto next;
+
+ if (!nd6_optimistic_dad &&
+ (ia->ia6_flags & IN6_IFF_OPTIMISTIC) != 0)
goto next;
/* Rule 1: Prefer same address */
if (IN6_ARE_ADDR_EQUAL(&dst, &ia->ia_addr.sin6_addr))
- BREAK(1); /* there should be no better candidate */
+ BREAK(IP6S_SRCRULE_1); /* there should be no better candidate */
if (ia_best == NULL)
- REPLACE(0);
+ REPLACE(IP6S_SRCRULE_0);
/* Rule 2: Prefer appropriate scope */
if (dst_scope < 0)
new_scope = in6_addrscope(&ia->ia_addr.sin6_addr);
if (IN6_ARE_SCOPE_CMP(best_scope, new_scope) < 0) {
if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0)
- REPLACE(2);
- NEXTSRC(2);
+ REPLACE(IP6S_SRCRULE_2);
+ NEXTSRC(IP6S_SRCRULE_2);
} else if (IN6_ARE_SCOPE_CMP(new_scope, best_scope) < 0) {
if (IN6_ARE_SCOPE_CMP(new_scope, dst_scope) < 0)
- NEXTSRC(2);
- REPLACE(2);
+ NEXTSRC(IP6S_SRCRULE_2);
+ REPLACE(IP6S_SRCRULE_2);
}
/*
* Rule 3: Avoid deprecated addresses. Note that the case of
* !ip6_use_deprecated is already rejected above.
*/
- if (!IFA6_IS_DEPRECATED(ia_best) && IFA6_IS_DEPRECATED(ia))
- NEXTSRC(3);
- if (IFA6_IS_DEPRECATED(ia_best) && !IFA6_IS_DEPRECATED(ia))
- REPLACE(3);
+ if (!IFA6_IS_DEPRECATED(ia_best, secs) &&
+ IFA6_IS_DEPRECATED(ia, secs))
+ NEXTSRC(IP6S_SRCRULE_3);
+ if (IFA6_IS_DEPRECATED(ia_best, secs) &&
+ !IFA6_IS_DEPRECATED(ia, secs))
+ REPLACE(IP6S_SRCRULE_3);
+
+ /*
+ * RFC 4429 says that optimistic addresses are equivalent to
+ * deprecated addresses, so avoid them here.
+ */
+ if ((ia_best->ia6_flags & IN6_IFF_OPTIMISTIC) == 0 &&
+ (ia->ia6_flags & IN6_IFF_OPTIMISTIC) != 0)
+ NEXTSRC(IP6S_SRCRULE_3);
+ if ((ia_best->ia6_flags & IN6_IFF_OPTIMISTIC) != 0 &&
+ (ia->ia6_flags & IN6_IFF_OPTIMISTIC) == 0)
+ REPLACE(IP6S_SRCRULE_3);
/* Rule 4: Prefer home addresses */
/*
/* Rule 5: Prefer outgoing interface */
if (ia_best->ia_ifp == ifp && ia->ia_ifp != ifp)
- NEXTSRC(5);
+ NEXTSRC(IP6S_SRCRULE_5);
if (ia_best->ia_ifp != ifp && ia->ia_ifp == ifp)
- REPLACE(5);
+ REPLACE(IP6S_SRCRULE_5);
+
+ /* Rule 5.5: Prefer addresses in a prefix advertised by the next hop. */
+ if (ro != NULL && ro->ro_rt != NULL && ia_best->ia6_ndpr != NULL &&
+ ia->ia6_ndpr != NULL) {
+ struct rtentry *rta, *rtb;
+ int op;
+
+ NDPR_LOCK(ia_best->ia6_ndpr);
+ rta = ia_best->ia6_ndpr->ndpr_rt;
+ if (rta != NULL)
+ RT_ADDREF(rta);
+ NDPR_UNLOCK(ia_best->ia6_ndpr);
+
+ NDPR_LOCK(ia->ia6_ndpr);
+ rtb = ia->ia6_ndpr->ndpr_rt;
+ if (rtb != NULL)
+ RT_ADDREF(rtb);
+ NDPR_UNLOCK(ia->ia6_ndpr);
+
+ if (rta == NULL || rtb == NULL)
+ op = 0;
+ else if (rta == ro->ro_rt && rtb != ro->ro_rt)
+ op = 1;
+ else if (rta != ro->ro_rt && rtb == ro->ro_rt)
+ op = 2;
+ else
+ op = 0;
+
+ if (rta != NULL)
+ RT_REMREF(rta);
+ if (rtb != NULL)
+ RT_REMREF(rtb);
+
+ switch (op) {
+ case 1:
+ NEXTSRC(IP6S_SRCRULE_5_5);
+ break;
+ case 2:
+ REPLACE(IP6S_SRCRULE_5_5);
+ break;
+ default:
+ break;
+ }
+ }
/*
* Rule 6: Prefer matching label
new_policy = in6_addrsel_lookup_policy(&ia->ia_addr);
if (dst_policy->label == best_policy->label &&
dst_policy->label != new_policy->label)
- NEXTSRC(6);
+ NEXTSRC(IP6S_SRCRULE_6);
if (dst_policy->label != best_policy->label &&
dst_policy->label == new_policy->label)
- REPLACE(6);
+ REPLACE(IP6S_SRCRULE_6);
}
/*
- * Rule 7: Prefer public addresses.
+ * Rule 7: Prefer temporary addresses.
* We allow users to reverse the logic by configuring
- * a sysctl variable, so that privacy conscious users can
- * always prefer temporary addresses.
+ * a sysctl variable, so that transparency conscious users can
+ * always prefer stable addresses.
* Don't use temporary addresses for local destinations or
* for multicast addresses unless we were passed in an option.
*/
if (IN6_IS_ADDR_MULTICAST(&dst) ||
in6_matchlen(&ia_best->ia_addr.sin6_addr, &dst) >=
- in6_mask2len(&ia_best->ia_prefixmask.sin6_addr, NULL))
+ ia_best->ia_plen)
islocal = TRUE;
if (opts == NULL ||
opts->ip6po_prefer_tempaddr == IP6PO_TEMPADDR_SYSTEM) {
if (!(ia_best->ia6_flags & IN6_IFF_TEMPORARY) &&
(ia->ia6_flags & IN6_IFF_TEMPORARY)) {
if (prefer_tempaddr)
- REPLACE(7);
+ REPLACE(IP6S_SRCRULE_7);
else
- NEXTSRC(7);
+ NEXTSRC(IP6S_SRCRULE_7);
}
if ((ia_best->ia6_flags & IN6_IFF_TEMPORARY) &&
!(ia->ia6_flags & IN6_IFF_TEMPORARY)) {
if (prefer_tempaddr)
- NEXTSRC(7);
+ NEXTSRC(IP6S_SRCRULE_7);
else
- REPLACE(7);
+ REPLACE(IP6S_SRCRULE_7);
}
/*
- * Rule 8: prefer addresses on alive interfaces.
+ * Rule 7x: prefer addresses on alive interfaces.
* This is a KAME specific rule.
*/
if ((ia_best->ia_ifp->if_flags & IFF_UP) &&
!(ia->ia_ifp->if_flags & IFF_UP))
- NEXTSRC(8);
+ NEXTSRC(IP6S_SRCRULE_7x);
if (!(ia_best->ia_ifp->if_flags & IFF_UP) &&
(ia->ia_ifp->if_flags & IFF_UP))
- REPLACE(8);
+ REPLACE(IP6S_SRCRULE_7x);
/*
- * Rule 14: Use longest matching prefix.
- * Note: in the address selection draft, this rule is
- * documented as "Rule 8". However, since it is also
- * documented that this rule can be overridden, we assign
- * a large number so that it is easy to assign smaller numbers
- * to more preferred rules.
+ * Rule 8: Use longest matching prefix.
*/
new_matchlen = in6_matchlen(&ia->ia_addr.sin6_addr, &dst);
if (best_matchlen < new_matchlen)
- REPLACE(14);
+ REPLACE(IP6S_SRCRULE_8);
if (new_matchlen < best_matchlen)
- NEXTSRC(14);
-
- /* Rule 15 is reserved. */
+ NEXTSRC(IP6S_SRCRULE_8);
/*
* Last resort: just keep the current candidate.
replace:
best_scope = (new_scope >= 0 ? new_scope :
- in6_addrscope(&ia->ia_addr.sin6_addr));
+ in6_addrscope(&ia->ia_addr.sin6_addr));
best_policy = (new_policy ? new_policy :
- in6_addrsel_lookup_policy(&ia->ia_addr));
+ in6_addrsel_lookup_policy(&ia->ia_addr));
best_matchlen = (new_matchlen >= 0 ? new_matchlen :
- in6_matchlen(&ia->ia_addr.sin6_addr, &dst));
+ in6_matchlen(&ia->ia_addr.sin6_addr, &dst));
IFA_ADDREF_LOCKED(&ia->ia_ifa); /* for ia_best */
IFA_UNLOCK(&ia->ia_ifa);
if (ia_best != NULL)
lck_rw_done(&in6_ifaddr_rwlock);
- if (nocell && ia_best != NULL &&
- (ia_best->ia_ifa.ifa_ifp->if_type == IFT_CELLULAR)) {
+ if (ia_best != NULL && inp &&
+ inp_restricted_send(inp, ia_best->ia_ifa.ifa_ifp)) {
IFA_REMREF(&ia_best->ia_ifa);
ia_best = NULL;
+ *errorp = EHOSTUNREACH;
}
- if ( (ia = ia_best) == NULL) {
- *errorp = EADDRNOTAVAIL;
- if (ifp != NULL)
- ifnet_release(ifp);
- return (NULL);
+ if ((ia = ia_best) == NULL) {
+ if (*errorp == 0)
+ *errorp = EADDRNOTAVAIL;
+ src_storage = NULL;
+ goto done;
}
IFA_LOCK_SPIN(&ia->ia_ifa);
*src_storage = satosin6(&ia->ia_addr)->sin6_addr;
IFA_UNLOCK(&ia->ia_ifa);
IFA_REMREF(&ia->ia_ifa);
+done:
if (ifpp != NULL) {
/* if ifp is non-NULL, refcnt held in in6_selectif() */
*ifpp = ifp;
* i.e. for any given pcb there can only be one thread performing output at
* the IPv6 layer.
*
- * This routine is analogous to in_selectsrcif() for IPv4.
+ * This routine is analogous to in_selectsrcif() for IPv4. Regardless of
+ * error, it will return an ifp with a reference held if the caller provides
+ * a non-NULL retifp. The caller is responsible for checking if the
+ * returned ifp is valid and release its reference at all times.
*
* clone - meaningful only for bsdi and freebsd
*/
static int
selectroute(struct sockaddr_in6 *srcsock, struct sockaddr_in6 *dstsock,
- struct ip6_pktopts *opts, struct ip6_moptions *mopts, struct route_in6 *ro,
+ struct ip6_pktopts *opts, struct ip6_moptions *mopts,
+ struct in6_ifaddr **retsrcia, struct route_in6 *ro,
struct ifnet **retifp, struct rtentry **retrt, int clone,
- int norouteok, unsigned int ifscope, unsigned int nocell)
+ int norouteok, struct ip6_out_args *ip6oa)
{
int error = 0;
- struct ifnet *ifp = NULL;
+ struct ifnet *ifp = NULL, *ifp0 = NULL;
struct route_in6 *route = NULL;
struct sockaddr_in6 *sin6_next;
struct in6_pktinfo *pi = NULL;
struct in6_addr *dst = &dstsock->sin6_addr;
struct ifaddr *ifa = NULL;
char s_src[MAX_IPv6_STR_LEN], s_dst[MAX_IPv6_STR_LEN];
- boolean_t select_srcif;
+ boolean_t select_srcif, proxied_ifa = FALSE, local_dst = FALSE;
+ unsigned int ifscope = ((ip6oa != NULL) ?
+ ip6oa->ip6oa_boundif : IFSCOPE_NONE);
#if 0
char ip6buf[INET6_ADDRSTRLEN];
dstsock->sin6_addr.s6_addr32[1] == 0 &&
!IN6_IS_ADDR_LOOPBACK(&dstsock->sin6_addr)) {
printf("in6_selectroute: strange destination %s\n",
- ip6_sprintf(ip6buf, &dstsock->sin6_addr));
+ ip6_sprintf(ip6buf, &dstsock->sin6_addr));
} else {
printf("in6_selectroute: destination = %s%%%d\n",
- ip6_sprintf(ip6buf, &dstsock->sin6_addr),
- dstsock->sin6_scope_id); /* for debug */
+ ip6_sprintf(ip6buf, &dstsock->sin6_addr),
+ dstsock->sin6_scope_id); /* for debug */
}
#endif
ifscope = pi->ipi6_ifindex;
ifnet_head_lock_shared();
/* ifp may be NULL if detached or out of range */
- ifp = (ifscope <= if_index) ? ifindex2ifnet[ifscope] : NULL;
+ ifp = ifp0 =
+ ((ifscope <= if_index) ? ifindex2ifnet[ifscope] : NULL);
ifnet_head_done();
if (norouteok || retrt == NULL || IN6_IS_ADDR_MULTICAST(dst)) {
/*
*/
if (IN6_IS_ADDR_MULTICAST(dst) && mopts != NULL) {
IM6O_LOCK(mopts);
- if ((ifp = mopts->im6o_multicast_ifp) != NULL) {
+ if ((ifp = ifp0 = mopts->im6o_multicast_ifp) != NULL) {
IM6O_UNLOCK(mopts);
goto done; /* we do not need a route for multicast. */
}
* or if we haven't done source interface selection on this
* route (for this PCB instance) before.
*/
- if (!select_srcif || (ro != NULL && ro->ro_rt != NULL &&
- (ro->ro_rt->rt_flags & RTF_UP) &&
- ro->ro_rt->generation_id == route_generation &&
- (ro->ro_flags & ROF_SRCIF_SELECTED))) {
- if (ro != NULL && ro->ro_rt != NULL) {
- ifa = ro->ro_rt->rt_ifa;
- IFA_ADDREF(ifa);
- }
+ if (!select_srcif) {
+ goto getroute;
+ } else if (!ROUTE_UNUSABLE(ro) && ro->ro_srcia != NULL &&
+ (ro->ro_flags & ROF_SRCIF_SELECTED)) {
+ if (ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)
+ local_dst = TRUE;
+ ifa = ro->ro_srcia;
+ IFA_ADDREF(ifa); /* for caller */
goto getroute;
}
if (scope == IFSCOPE_NONE) {
scope = rt_ifp->if_index;
if (scope != get_primary_ifscope(AF_INET6) &&
- ro->ro_rt->generation_id != route_generation)
+ ROUTE_UNUSABLE(ro))
scope = get_primary_ifscope(AF_INET6);
}
ifa = (struct ifaddr *)
ifa_foraddr6_scoped(&srcsock->sin6_addr, scope);
+ /*
+ * If we are forwarding and proxying prefix(es), see if the
+ * source address is one of ours and is a proxied address;
+ * if so, use it.
+ */
+ if (ifa == NULL && ip6_forwarding && nd6_prproxy) {
+ ifa = (struct ifaddr *)
+ ifa_foraddr6(&srcsock->sin6_addr);
+ if (ifa != NULL && !(proxied_ifa =
+ nd6_prproxy_ifaddr((struct in6_ifaddr *)ifa))) {
+ IFA_REMREF(ifa);
+ ifa = NULL;
+ }
+ }
+
if (ip6_select_srcif_debug && ifa != NULL) {
if (ro->ro_rt != NULL) {
printf("%s->%s ifscope %d->%d ifa_if %s "
* found interface.
*/
if (ifa == NULL && ifscope == IFSCOPE_NONE) {
+ struct ifaddr *ifadst;
+
+ /* Check if the destination address is one of ours */
+ ifadst = (struct ifaddr *)ifa_foraddr6(&dstsock->sin6_addr);
+ if (ifadst != NULL) {
+ local_dst = TRUE;
+ IFA_REMREF(ifadst);
+ }
+
ifa = (struct ifaddr *)ifa_foraddr6(&srcsock->sin6_addr);
if (ip6_select_srcif_debug && ifa != NULL) {
}
getroute:
- if (ifa != NULL)
+ if (ifa != NULL && !proxied_ifa && !local_dst)
ifscope = ifa->ifa_ifp->if_index;
/*
ron = &opts->ip6po_nextroute;
if (ron->ro_rt != NULL)
RT_LOCK(ron->ro_rt);
- if ((ron->ro_rt != NULL &&
- ((ron->ro_rt->rt_flags & (RTF_UP | RTF_LLINFO)) !=
- (RTF_UP | RTF_LLINFO) ||
- ron->ro_rt->generation_id != route_generation ||
+ if (ROUTE_UNUSABLE(ron) || (ron->ro_rt != NULL &&
+ (!(ron->ro_rt->rt_flags & RTF_LLINFO) ||
(select_srcif && (ifa == NULL ||
- ifa->ifa_ifp != ron->ro_rt->rt_ifp)))) ||
+ (ifa->ifa_ifp != ron->ro_rt->rt_ifp && !proxied_ifa))))) ||
!IN6_ARE_ADDR_EQUAL(&satosin6(&ron->ro_dst)->sin6_addr,
&sin6_next->sin6_addr)) {
- if (ron->ro_rt != NULL) {
+ if (ron->ro_rt != NULL)
RT_UNLOCK(ron->ro_rt);
- rtfree(ron->ro_rt);
- ron->ro_rt = NULL;
- }
+
+ ROUTE_RELEASE(ron);
*satosin6(&ron->ro_dst) = *sin6_next;
}
if (ron->ro_rt == NULL) {
rtalloc_scoped((struct route *)ron, ifscope);
if (ron->ro_rt != NULL)
RT_LOCK(ron->ro_rt);
- if (ron->ro_rt == NULL ||
+ if (ROUTE_UNUSABLE(ron) ||
!(ron->ro_rt->rt_flags & RTF_LLINFO) ||
!IN6_ARE_ADDR_EQUAL(&satosin6(rt_key(ron->ro_rt))->
sin6_addr, &sin6_next->sin6_addr)) {
- if (ron->ro_rt != NULL) {
+ if (ron->ro_rt != NULL)
RT_UNLOCK(ron->ro_rt);
- rtfree(ron->ro_rt);
- ron->ro_rt = NULL;
- }
+
+ ROUTE_RELEASE(ron);
error = EHOSTUNREACH;
goto done;
}
}
route = ron;
- ifp = ron->ro_rt->rt_ifp;
+ ifp = ifp0 = ron->ro_rt->rt_ifp;
/*
* When cloning is required, try to allocate a route to the
if (ro == NULL)
goto done;
if (ro->ro_rt != NULL)
- RT_LOCK(ro->ro_rt);
- if (ro->ro_rt != NULL && (!(ro->ro_rt->rt_flags & RTF_UP) ||
- satosin6(&ro->ro_dst)->sin6_family != AF_INET6 ||
- ro->ro_rt->generation_id != route_generation ||
+ RT_LOCK_SPIN(ro->ro_rt);
+ if (ROUTE_UNUSABLE(ro) || (ro->ro_rt != NULL &&
+ (satosin6(&ro->ro_dst)->sin6_family != AF_INET6 ||
!IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst) ||
(select_srcif && (ifa == NULL ||
- ifa->ifa_ifp != ro->ro_rt->rt_ifp)))) {
- RT_UNLOCK(ro->ro_rt);
- rtfree(ro->ro_rt);
- ro->ro_rt = NULL;
+ (ifa->ifa_ifp != ro->ro_rt->rt_ifp && !proxied_ifa)))))) {
+ if (ro->ro_rt != NULL)
+ RT_UNLOCK(ro->ro_rt);
+
+ ROUTE_RELEASE(ro);
}
if (ro->ro_rt == NULL) {
struct sockaddr_in6 *sa6;
if (ro->ro_rt != NULL)
RT_UNLOCK(ro->ro_rt);
/* No route yet, so try to acquire one */
- bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
+ bzero(&ro->ro_dst, sizeof (struct sockaddr_in6));
sa6 = (struct sockaddr_in6 *)&ro->ro_dst;
sa6->sin6_family = AF_INET6;
- sa6->sin6_len = sizeof(struct sockaddr_in6);
+ sa6->sin6_len = sizeof (struct sockaddr_in6);
sa6->sin6_addr = *dst;
if (IN6_IS_ADDR_MULTICAST(dst)) {
ro->ro_rt = rtalloc1_scoped(
rtalloc_scoped((struct route *)ro, ifscope);
}
if (ro->ro_rt != NULL)
- RT_LOCK(ro->ro_rt);
+ RT_LOCK_SPIN(ro->ro_rt);
}
/*
if (ro->ro_rt != NULL) {
RT_LOCK_ASSERT_HELD(ro->ro_rt);
- ifp = ro->ro_rt->rt_ifp;
+ ifp = ifp0 = ro->ro_rt->rt_ifp;
} else {
error = EHOSTUNREACH;
}
validateroute:
if (select_srcif) {
boolean_t has_route = (route != NULL && route->ro_rt != NULL);
+ boolean_t srcif_selected = FALSE;
if (has_route)
RT_LOCK_ASSERT_HELD(route->ro_rt);
if (has_route && (ifa == NULL ||
(ifa->ifa_ifp != ifp && ifp != lo_ifp) ||
!(route->ro_rt->rt_flags & RTF_UP))) {
- if (ip6_select_srcif_debug) {
- if (ifa != NULL) {
- printf("%s->%s ifscope %d ro_if %s "
- "!= ifa_if %s (cached route "
- "cleared)\n", s_src, s_dst,
- ifscope, if_name(ifp),
- if_name(ifa->ifa_ifp));
- } else {
- printf("%s->%s ifscope %d ro_if %s "
- "(no ifa_if found)\n", s_src,
- s_dst, ifscope, if_name(ifp));
+ /*
+ * If the destination address belongs to a proxied
+ * prefix, relax the requirement and allow the packet
+ * to come out of the proxy interface with the source
+ * address of the real interface.
+ */
+ if (ifa != NULL && proxied_ifa &&
+ (route->ro_rt->rt_flags & (RTF_UP|RTF_PROXY)) ==
+ (RTF_UP|RTF_PROXY)) {
+ srcif_selected = TRUE;
+ } else {
+ if (ip6_select_srcif_debug) {
+ if (ifa != NULL) {
+ printf("%s->%s ifscope %d "
+ "ro_if %s != ifa_if %s "
+ "(cached route cleared)\n",
+ s_src, s_dst,
+ ifscope, if_name(ifp),
+ if_name(ifa->ifa_ifp));
+ } else {
+ printf("%s->%s ifscope %d "
+ "ro_if %s (no ifa_if "
+ "found)\n", s_src, s_dst,
+ ifscope, if_name(ifp));
+ }
}
+ RT_UNLOCK(route->ro_rt);
+ ROUTE_RELEASE(route);
+ error = EHOSTUNREACH;
+ /* Undo the settings done above */
+ route = NULL;
+ ifp = NULL; /* ditch ifp; keep ifp0 */
+ has_route = FALSE;
}
- RT_UNLOCK(route->ro_rt);
- rtfree(route->ro_rt);
- route->ro_rt = NULL;
- route->ro_flags &= ~ROF_SRCIF_SELECTED;
- error = EHOSTUNREACH;
- /* Undo the settings done above */
- route = NULL;
- ifp = NULL;
} else if (has_route) {
- route->ro_flags |= ROF_SRCIF_SELECTED;
- route->ro_rt->generation_id = route_generation;
+ srcif_selected = TRUE;
+ }
+
+ if (srcif_selected) {
+ VERIFY(has_route);
+ if (ifa != route->ro_srcia ||
+ !(route->ro_flags & ROF_SRCIF_SELECTED)) {
+ RT_CONVERT_LOCK(route->ro_rt);
+ if (ifa != NULL)
+ IFA_ADDREF(ifa); /* for route_in6 */
+ if (route->ro_srcia != NULL)
+ IFA_REMREF(route->ro_srcia);
+ route->ro_srcia = ifa;
+ route->ro_flags |= ROF_SRCIF_SELECTED;
+ RT_GENID_SYNC(route->ro_rt);
+ }
RT_UNLOCK(route->ro_rt);
}
} else {
}
done:
- if (nocell && error == 0) {
- if ((ifp != NULL && ifp->if_type == IFT_CELLULAR) ||
- (route != NULL && route->ro_rt != NULL &&
- route->ro_rt->rt_ifp->if_type == IFT_CELLULAR)) {
- if (route != NULL && route->ro_rt != NULL) {
- rtfree(route->ro_rt);
- route->ro_rt = NULL;
- route->ro_flags &= ~ROF_SRCIF_SELECTED;
- route = NULL;
- }
- ifp = NULL;
- error = EHOSTUNREACH;
+ /*
+ * Check for interface restrictions.
+ */
+#define CHECK_RESTRICTIONS(_ip6oa, _ifp) \
+ ((((_ip6oa)->ip6oa_flags & IP6OAF_NO_CELLULAR) && \
+ IFNET_IS_CELLULAR(_ifp)) || \
+ (((_ip6oa)->ip6oa_flags & IP6OAF_NO_EXPENSIVE) && \
+ IFNET_IS_EXPENSIVE(_ifp)) || \
+ (!((_ip6oa)->ip6oa_flags & IP6OAF_AWDL_UNRESTRICTED) && \
+ IFNET_IS_AWDL_RESTRICTED(_ifp)))
+
+ if (error == 0 && ip6oa != NULL &&
+ ((ifp && CHECK_RESTRICTIONS(ip6oa, ifp)) ||
+ (route && route->ro_rt &&
+ CHECK_RESTRICTIONS(ip6oa, route->ro_rt->rt_ifp)))) {
+ if (route != NULL && route->ro_rt != NULL) {
+ ROUTE_RELEASE(route);
+ route = NULL;
}
+ ifp = NULL; /* ditch ifp; keep ifp0 */
+ error = EHOSTUNREACH;
+ ip6oa->ip6oa_retflags |= IP6OARF_IFDENIED;
+ }
+#undef CHECK_RESTRICTIONS
+
+ /*
+ * If the interface is disabled for IPv6, then ENETDOWN error.
+ */
+ if (error == 0 &&
+ ifp != NULL && (ifp->if_eflags & IFEF_IPV6_DISABLED)) {
+ error = ENETDOWN;
}
if (ifp == NULL && (route == NULL || route->ro_rt == NULL)) {
*/
error = EHOSTUNREACH;
}
- if (error == EHOSTUNREACH)
+ if (error == EHOSTUNREACH || error == ENETDOWN)
ip6stat.ip6s_noroute++;
+ /*
+ * We'll return ifp regardless of error, so pick it up from ifp0
+ * in case it was nullified above. Caller is responsible for
+ * releasing the ifp if it is non-NULL.
+ */
+ ifp = ifp0;
+ if (retifp != NULL) {
+ if (ifp != NULL)
+ ifnet_reference(ifp); /* for caller */
+ *retifp = ifp;
+ }
+
+ if (retsrcia != NULL) {
+ if (ifa != NULL)
+ IFA_ADDREF(ifa); /* for caller */
+ *retsrcia = (struct in6_ifaddr *)ifa;
+ }
+
if (error == 0) {
- if (retifp != NULL) {
- if (ifp != NULL)
- ifnet_reference(ifp); /* for caller */
- *retifp = ifp;
- }
if (retrt != NULL && route != NULL)
*retrt = route->ro_rt; /* ro_rt may be NULL */
} else if (select_srcif && ip6_select_srcif_debug) {
return (error);
}
+/*
+ * Regardless of error, it will return an ifp with a reference held if the
+ * caller provides a non-NULL retifp. The caller is responsible for checking
+ * if the returned ifp is valid and release its reference at all times.
+ */
static int
in6_selectif(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts,
- struct ip6_moptions *mopts, struct route_in6 *ro, unsigned int ifscope,
- unsigned int nocell, struct ifnet **retifp)
+ struct ip6_moptions *mopts, struct route_in6 *ro,
+ struct ip6_out_args *ip6oa, struct ifnet **retifp)
{
- int error;
+ int err = 0;
struct route_in6 sro;
struct rtentry *rt = NULL;
if (ro == NULL) {
- bzero(&sro, sizeof(sro));
+ bzero(&sro, sizeof (sro));
ro = &sro;
}
- if ((error = selectroute(NULL, dstsock, opts, mopts, ro, retifp,
- &rt, 0, 1, ifscope, nocell)) != 0) {
- if (ro == &sro && rt && rt == sro.ro_rt)
- rtfree(rt);
- return (error);
- }
+ if ((err = selectroute(NULL, dstsock, opts, mopts, NULL, ro, retifp,
+ &rt, 0, 1, ip6oa)) != 0)
+ goto done;
/*
* do not use a rejected or black hole route.
* We thus reject the case here.
*/
if (rt && (rt->rt_flags & (RTF_REJECT | RTF_BLACKHOLE))) {
- int flags = (rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
-
- if (ro == &sro && rt && rt == sro.ro_rt)
- rtfree(rt);
- return (flags);
+ err = ((rt->rt_flags & RTF_HOST) ? EHOSTUNREACH : ENETUNREACH);
+ goto done;
}
/*
* destination address (which should probably be one of our own
* addresses.)
*/
- if (rt && rt->rt_ifa && rt->rt_ifa->ifa_ifp) {
+ if (rt != NULL && rt->rt_ifa != NULL && rt->rt_ifa->ifa_ifp != NULL &&
+ retifp != NULL) {
+ ifnet_reference(rt->rt_ifa->ifa_ifp);
if (*retifp != NULL)
ifnet_release(*retifp);
*retifp = rt->rt_ifa->ifa_ifp;
- ifnet_reference(*retifp);
}
- if (ro == &sro && rt && rt == sro.ro_rt)
- rtfree(rt);
- return (0);
+done:
+ if (ro == &sro) {
+ VERIFY(rt == NULL || rt == ro->ro_rt);
+ ROUTE_RELEASE(ro);
+ }
+
+ /*
+ * retifp might point to a valid ifp with a reference held;
+ * caller is responsible for releasing it if non-NULL.
+ */
+ return (err);
}
/*
+ * Regardless of error, it will return an ifp with a reference held if the
+ * caller provides a non-NULL retifp. The caller is responsible for checking
+ * if the returned ifp is valid and release its reference at all times.
+ *
* clone - meaningful only for bsdi and freebsd
*/
int
in6_selectroute(struct sockaddr_in6 *srcsock, struct sockaddr_in6 *dstsock,
- struct ip6_pktopts *opts, struct ip6_moptions *mopts, struct route_in6 *ro,
- struct ifnet **retifp, struct rtentry **retrt, int clone,
- unsigned int ifscope, unsigned int nocell)
+ struct ip6_pktopts *opts, struct ip6_moptions *mopts,
+ struct in6_ifaddr **retsrcia, struct route_in6 *ro, struct ifnet **retifp,
+ struct rtentry **retrt, int clone, struct ip6_out_args *ip6oa)
{
- return (selectroute(srcsock, dstsock, opts, mopts, ro, retifp,
- retrt, clone, 0, ifscope, nocell));
+ return (selectroute(srcsock, dstsock, opts, mopts, retsrcia, ro, retifp,
+ retrt, clone, 0, ip6oa));
}
/*
* 2. (If the outgoing interface is detected) the current
* hop limit of the interface specified by router advertisement.
* 3. The system default hoplimit.
-*/
+ */
int
-in6_selecthlim(
- struct in6pcb *in6p,
- struct ifnet *ifp)
+in6_selecthlim(struct in6pcb *in6p, struct ifnet *ifp)
{
if (in6p && in6p->in6p_hops >= 0) {
- return(in6p->in6p_hops);
+ return (in6p->in6p_hops);
} else {
lck_rw_lock_shared(nd_if_rwlock);
if (ifp && ifp->if_index < nd_ifinfo_indexlim) {
- u_int8_t chlim = nd_ifinfo[ifp->if_index].chlim;
+ u_int8_t chlim;
+ struct nd_ifinfo *ndi = &nd_ifinfo[ifp->if_index];
+
+ if (ndi->initialized) {
+ /* access chlim without lock, for performance */
+ chlim = ndi->chlim;
+ } else {
+ chlim = ip6_defhlim;
+ }
lck_rw_done(nd_if_rwlock);
return (chlim);
} else {
lck_rw_done(nd_if_rwlock);
- return(ip6_defhlim);
+ return (ip6_defhlim);
}
}
}
* share this function by all *bsd*...
*/
int
-in6_pcbsetport(
- __unused struct in6_addr *laddr,
- struct inpcb *inp,
- struct proc *p,
- int locked)
+in6_pcbsetport(struct in6_addr *laddr, struct inpcb *inp, struct proc *p,
+ int locked)
{
+#pragma unused(laddr)
struct socket *so = inp->inp_socket;
u_int16_t lport = 0, first, last, *lastport;
int count, error = 0, wild = 0;
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
kauth_cred_t cred;
if (!locked) { /* Make sure we don't run into a deadlock: 4052373 */
- if (!lck_rw_try_lock_exclusive(pcbinfo->mtx)) {
+ if (!lck_rw_try_lock_exclusive(pcbinfo->ipi_lock)) {
socket_unlock(inp->inp_socket, 0);
- lck_rw_lock_exclusive(pcbinfo->mtx);
+ lck_rw_lock_exclusive(pcbinfo->ipi_lock);
socket_lock(inp->inp_socket, 0);
}
+
+ /*
+ * Check if a local port was assigned to the inp while
+ * this thread was waiting for the pcbinfo lock
+ */
+ if (inp->inp_lport != 0) {
+ VERIFY(inp->inp_flags2 & INP2_INHASHLIST);
+ lck_rw_done(pcbinfo->ipi_lock);
+
+ /*
+ * It is not an error if another thread allocated
+ * a port
+ */
+ return (0);
+ }
}
/* XXX: this is redundant when called from in6_pcbbind */
if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
wild = INPLOOKUP_WILDCARD;
- inp->inp_flags |= INP_ANONPORT;
-
if (inp->inp_flags & INP_HIGHPORT) {
first = ipport_hifirstauto; /* sysctl */
last = ipport_hilastauto;
- lastport = &pcbinfo->lasthi;
+ lastport = &pcbinfo->ipi_lasthi;
} else if (inp->inp_flags & INP_LOWPORT) {
cred = kauth_cred_proc_ref(p);
error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0);
kauth_cred_unref(&cred);
if (error != 0) {
if (!locked)
- lck_rw_done(pcbinfo->mtx);
- return error;
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (error);
}
first = ipport_lowfirstauto; /* 1023 */
last = ipport_lowlastauto; /* 600 */
- lastport = &pcbinfo->lastlow;
+ lastport = &pcbinfo->ipi_lastlow;
} else {
first = ipport_firstauto; /* sysctl */
last = ipport_lastauto;
- lastport = &pcbinfo->lastport;
+ lastport = &pcbinfo->ipi_lastport;
}
/*
* Simple check to ensure all ports are not used up causing
* occurred above.
*/
inp->in6p_laddr = in6addr_any;
- inp->in6p_last_outif = 0;
+ inp->in6p_last_outifp = NULL;
if (!locked)
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_done(pcbinfo->ipi_lock);
return (EAGAIN);
}
--*lastport;
if (*lastport > first || *lastport < last)
*lastport = first;
lport = htons(*lastport);
- } while (in6_pcblookup_local(pcbinfo,
- &inp->in6p_laddr, lport, wild));
+ } while (in6_pcblookup_local(pcbinfo, &inp->in6p_laddr, lport,
+ wild));
} else {
- /*
- * counting up
- */
+ /* counting up */
count = last - first;
do {
* occurred above.
*/
inp->in6p_laddr = in6addr_any;
- inp->in6p_last_outif = 0;
+ inp->in6p_last_outifp = NULL;
if (!locked)
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_done(pcbinfo->ipi_lock);
return (EAGAIN);
}
++*lastport;
if (*lastport < first || *lastport > last)
*lastport = first;
lport = htons(*lastport);
- } while (in6_pcblookup_local(pcbinfo,
- &inp->in6p_laddr, lport, wild));
+ } while (in6_pcblookup_local(pcbinfo, &inp->in6p_laddr, lport,
+ wild));
}
inp->inp_lport = lport;
+ inp->inp_flags |= INP_ANONPORT;
+
if (in_pcbinshash(inp, 1) != 0) {
inp->in6p_laddr = in6addr_any;
+ inp->in6p_last_outifp = NULL;
+
inp->inp_lport = 0;
- inp->in6p_last_outif = 0;
+ inp->inp_flags &= ~INP_ANONPORT;
if (!locked)
- lck_rw_done(pcbinfo->mtx);
+ lck_rw_done(pcbinfo->ipi_lock);
return (EAGAIN);
}
if (!locked)
- lck_rw_done(pcbinfo->mtx);
- return(0);
+ lck_rw_done(pcbinfo->ipi_lock);
+ return (0);
}
/*
- * * The followings are implementation of the policy table using a
- * * simple tail queue.
- * * XXX such details should be hidden.
- * * XXX implementation using binary tree should be more efficient.
- * */
+ * The followings are implementation of the policy table using a
+ * simple tail queue.
+ * XXX such details should be hidden.
+ * XXX implementation using binary tree should be more efficient.
+ */
struct addrsel_policyent {
- TAILQ_ENTRY(addrsel_policyent) ape_entry;
- struct in6_addrpolicy ape_policy;
+ TAILQ_ENTRY(addrsel_policyent) ape_entry;
+ struct in6_addrpolicy ape_policy;
};
TAILQ_HEAD(addrsel_policyhead, addrsel_policyent);
static void
init_policy_queue(void)
{
-
- TAILQ_INIT(&addrsel_policytab);
+ TAILQ_INIT(&addrsel_policytab);
}
void
addrsel_policy_init(void)
{
/*
- * Default address selection policy based on RFC 3484 and
- * draft-arifumi-6man-rfc3484-revise-03.
+ * Default address selection policy based on RFC 6724.
*/
static const struct in6_addrpolicy defaddrsel[] = {
- /* localhost */
- { .addr = { .sin6_family = AF_INET6,
+ /* Loopback -- prefix=::1/128, precedence=50, label=0 */
+ {
+ .addr = {
+ .sin6_family = AF_INET6,
.sin6_addr = IN6ADDR_LOOPBACK_INIT,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .addrmask = { .sin6_family = AF_INET6,
- .sin6_addr = IN6MASK128,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .preced = 60,
- .label = 0 },
- /* ULA */
- { .addr = { .sin6_family = AF_INET6,
- .sin6_addr = {{{ 0xfc }}},
- .sin6_len = sizeof(struct sockaddr_in6) },
- .addrmask = { .sin6_family = AF_INET6,
- .sin6_addr = IN6MASK7,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .preced = 50,
- .label = 1 },
- /* any IPv6 src */
- { .addr = { .sin6_family = AF_INET6,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .addrmask = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6MASK128,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .preced = 50,
+ .label = 0
+ },
+
+ /* Unspecified -- prefix=::/0, precedence=40, label=1 */
+ {
+ .addr = {
+ .sin6_family = AF_INET6,
.sin6_addr = IN6ADDR_ANY_INIT,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .addrmask = { .sin6_family = AF_INET6,
- .sin6_addr = IN6MASK0,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .preced = 40,
- .label = 2 },
- /* any IPv4 src */
- { .addr = { .sin6_family = AF_INET6,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .addrmask = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6MASK0,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .preced = 40,
+ .label = 1
+ },
+
+ /* IPv4 Mapped -- prefix=::ffff:0:0/96, precedence=35, label=4 */
+ {
+ .addr = {
+ .sin6_family = AF_INET6,
.sin6_addr = IN6ADDR_V4MAPPED_INIT,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .addrmask = { .sin6_family = AF_INET6,
- .sin6_addr = IN6MASK96,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .preced = 30,
- .label = 3 },
- /* 6to4 */
- { .addr = { .sin6_family = AF_INET6,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .addrmask = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6MASK96,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .preced = 35,
+ .label = 4
+ },
+
+ /* 6to4 -- prefix=2002::/16, precedence=30, label=2 */
+ {
+ .addr = {
+ .sin6_family = AF_INET6,
.sin6_addr = {{{ 0x20, 0x02 }}},
- .sin6_len = sizeof(struct sockaddr_in6) },
- .addrmask = { .sin6_family = AF_INET6,
- .sin6_addr = IN6MASK16,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .preced = 20,
- .label = 4 },
- /* Teredo */
- { .addr = { .sin6_family = AF_INET6,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .addrmask = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6MASK16,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .preced = 30,
+ .label = 2
+ },
+
+ /* Teredo -- prefix=2001::/32, precedence=5, label=5 */
+ {
+ .addr = {
+ .sin6_family = AF_INET6,
.sin6_addr = {{{ 0x20, 0x01 }}},
- .sin6_len = sizeof(struct sockaddr_in6) },
- .addrmask = { .sin6_family = AF_INET6,
- .sin6_addr = IN6MASK32,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .preced = 10,
- .label = 5 },
- /* v4 compat addresses */
- { .addr = { .sin6_family = AF_INET6,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .addrmask = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6MASK32,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .preced = 5,
+ .label = 5
+ },
+
+ /* Unique Local (ULA) -- prefix=fc00::/7, precedence=3, label=13 */
+ {
+ .addr = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = {{{ 0xfc }}},
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .addrmask = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6MASK7,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .preced = 3,
+ .label = 13
+ },
+
+ /* IPv4 Compatible -- prefix=::/96, precedence=1, label=3 */
+ {
+ .addr = {
+ .sin6_family = AF_INET6,
.sin6_addr = IN6ADDR_ANY_INIT,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .addrmask = { .sin6_family = AF_INET6,
- .sin6_addr = IN6MASK96,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .preced = 1,
- .label = 10 },
- /* site-local (deprecated) */
- { .addr = { .sin6_family = AF_INET6,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .addrmask = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6MASK96,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .preced = 1,
+ .label = 3
+ },
+
+ /* Site-local (deprecated) -- prefix=fec0::/10, precedence=1, label=11 */
+ {
+ .addr = {
+ .sin6_family = AF_INET6,
.sin6_addr = {{{ 0xfe, 0xc0 }}},
- .sin6_len = sizeof(struct sockaddr_in6) },
- .addrmask = { .sin6_family = AF_INET6,
- .sin6_addr = IN6MASK16,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .preced = 1,
- .label = 11 },
- /* 6bone (deprecated) */
- { .addr = { .sin6_family = AF_INET6,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .addrmask = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6MASK16,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .preced = 1,
+ .label = 11
+ },
+
+ /* 6bone (deprecated) -- prefix=3ffe::/16, precedence=1, label=12 */
+ {
+ .addr = {
+ .sin6_family = AF_INET6,
.sin6_addr = {{{ 0x3f, 0xfe }}},
- .sin6_len = sizeof(struct sockaddr_in6) },
- .addrmask = { .sin6_family = AF_INET6,
- .sin6_addr = IN6MASK16,
- .sin6_len = sizeof(struct sockaddr_in6) },
- .preced = 1,
- .label = 12 },
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .addrmask = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6MASK16,
+ .sin6_len = sizeof (struct sockaddr_in6)
+ },
+ .preced = 1,
+ .label = 12
+ },
};
int i;
init_policy_queue();
/* initialize the "last resort" policy */
- bzero(&defaultaddrpolicy, sizeof(defaultaddrpolicy));
+ bzero(&defaultaddrpolicy, sizeof (defaultaddrpolicy));
defaultaddrpolicy.label = ADDR_LABEL_NOTAPP;
- for (i = 0; i < sizeof(defaddrsel) / sizeof(defaddrsel[0]); i++)
+ for (i = 0; i < sizeof (defaddrsel) / sizeof (defaddrsel[0]); i++)
add_addrsel_policyent(&defaddrsel[i]);
}
bestmatchlen = matchlen;
}
- next:
+ next:
continue;
}
return (bestpol);
-}
+}
static int
add_addrsel_policyent(const struct in6_addrpolicy *newpolicy)
{
struct addrsel_policyent *new, *pol;
- MALLOC(new, struct addrsel_policyent *, sizeof(*new), M_IFADDR,
- M_WAITOK);
+ MALLOC(new, struct addrsel_policyent *, sizeof (*new), M_IFADDR,
+ M_WAITOK);
ADDRSEL_LOCK();
/* duplication check */
TAILQ_FOREACH(pol, &addrsel_policytab, ape_entry) {
if (IN6_ARE_ADDR_EQUAL(&newpolicy->addr.sin6_addr,
- &pol->ape_policy.addr.sin6_addr) &&
+ &pol->ape_policy.addr.sin6_addr) &&
IN6_ARE_ADDR_EQUAL(&newpolicy->addrmask.sin6_addr,
- &pol->ape_policy.addrmask.sin6_addr)) {
+ &pol->ape_policy.addrmask.sin6_addr)) {
ADDRSEL_UNLOCK();
FREE(new, M_IFADDR);
return (EEXIST); /* or override it? */
}
}
- bzero(new, sizeof(*new));
+ bzero(new, sizeof (*new));
/* XXX: should validate entry */
new->ape_policy = *newpolicy;
int error = 0;
struct walkarg *w = arg;
- error = SYSCTL_OUT(w->w_req, pol, sizeof(*pol));
+ error = SYSCTL_OUT(w->w_req, pol, sizeof (*pol));
return (error);
}
static int
-in6_src_sysctl SYSCTL_HANDLER_ARGS
+in6_src_sysctl SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
struct walkarg w;
if (req->newptr)
- return EPERM;
- bzero(&w, sizeof(w));
+ return (EPERM);
+ bzero(&w, sizeof (w));
w.w_req = req;
return (walk_addrsel_policy(dump_addrsel_policyent, &w));
if (cmd != SIOCAADDRCTL_POLICY && cmd != SIOCDADDRCTL_POLICY)
return (EOPNOTSUPP); /* check for safety */
- ent0 = *(struct in6_addrpolicy *)data;
+ bcopy(data, &ent0, sizeof (ent0));
if (ent0.label == ADDR_LABEL_NOTAPP)
return (EINVAL);
* we may want to change the function to return something other than ifp.
*/
int
-in6_embedscope(
- struct in6_addr *in6,
- const struct sockaddr_in6 *sin6,
- struct in6pcb *in6p,
- struct ifnet **ifpp,
- struct ip6_pktopts *opt)
+in6_embedscope(struct in6_addr *in6, const struct sockaddr_in6 *sin6,
+ struct in6pcb *in6p, struct ifnet **ifpp, struct ip6_pktopts *opt)
{
struct ifnet *ifp = NULL;
u_int32_t scopeid;
scopeid = scope6_addr2default(in6);
#endif
- if (IN6_IS_SCOPE_LINKLOCAL(in6)) {
+ if (IN6_IS_SCOPE_LINKLOCAL(in6) || IN6_IS_ADDR_MC_INTFACELOCAL(in6)) {
struct in6_pktinfo *pi;
struct ifnet *im6o_multicast_ifp = NULL;
IM6O_UNLOCK(in6p->in6p_moptions);
}
- if (opt)
+ if (opt != NULL)
optp = opt;
- else if (in6p)
+ else if (in6p != NULL)
optp = in6p->in6p_outputopts;
/*
* KAME assumption: link id == interface id
*/
- ifnet_head_lock_shared();
- if (in6p && optp && (pi = optp->ip6po_pktinfo) &&
- pi->ipi6_ifindex) {
- ifp = ifindex2ifnet[pi->ipi6_ifindex];
+ if (in6p != NULL && optp != NULL &&
+ (pi = optp->ip6po_pktinfo) != NULL &&
+ pi->ipi6_ifindex != 0) {
+ /* ifp is needed here if only we're returning it */
+ if (ifpp != NULL) {
+ ifnet_head_lock_shared();
+ ifp = ifindex2ifnet[pi->ipi6_ifindex];
+ ifnet_head_done();
+ }
in6->s6_addr16[1] = htons(pi->ipi6_ifindex);
- } else if (in6p && IN6_IS_ADDR_MULTICAST(in6) &&
+ } else if (in6p != NULL && IN6_IS_ADDR_MULTICAST(in6) &&
in6p->in6p_moptions != NULL && im6o_multicast_ifp != NULL) {
ifp = im6o_multicast_ifp;
in6->s6_addr16[1] = htons(ifp->if_index);
- } else if (scopeid) {
- /*
+ } else if (scopeid != 0) {
+ /*
* Since scopeid is unsigned, we only have to check it
- * against if_index
+ * against if_index (ifnet_head_lock not needed since
+ * if_index is an ever-increasing integer.)
*/
- if (if_index < scopeid) {
- ifnet_head_done();
- return ENXIO; /* XXX EINVAL? */
+ if (if_index < scopeid)
+ return (ENXIO); /* XXX EINVAL? */
+ /* ifp is needed here only if we're returning it */
+ if (ifpp != NULL) {
+ ifnet_head_lock_shared();
+ ifp = ifindex2ifnet[scopeid];
+ ifnet_head_done();
}
- ifp = ifindex2ifnet[scopeid];
- /*XXX assignment to 16bit from 32bit variable */
+ /* XXX assignment to 16bit from 32bit variable */
in6->s6_addr16[1] = htons(scopeid & 0xffff);
}
- ifnet_head_done();
if (ifpp != NULL) {
if (ifp != NULL)
}
}
- return 0;
+ return (0);
}
/*
*/
sin6->sin6_scope_id = 0;
- if (IN6_IS_SCOPE_LINKLOCAL(in6)) {
+ if (IN6_IS_SCOPE_LINKLOCAL(in6) || IN6_IS_ADDR_MC_INTFACELOCAL(in6)) {
/*
* KAME assumption: link id == interface id
*/
scopeid = ntohs(sin6->sin6_addr.s6_addr16[1]);
if (scopeid) {
- /*
- * sanity check
+ /*
+ * sanity check
*
* Since scopeid is unsigned, we only have to check it
* against if_index
*/
if (if_index < scopeid)
- return ENXIO;
+ return (ENXIO);
if (ifp && ifp->if_index != scopeid)
- return ENXIO;
+ return (ENXIO);
sin6->sin6_addr.s6_addr16[1] = 0;
sin6->sin6_scope_id = scopeid;
}
}
- return 0;
+ return (0);
}
projects / apple / xnu.git / blobdiff