/*
- * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2016 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");
+
+static int ip6_select_srcaddr_debug = 0;
+SYSCTL_INT(_net_inet6_ip6, OID_AUTO, select_srcaddr_debug,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_select_srcaddr_debug, 0,
+ "log source address selection debug info");
-#define ADDR_LABEL_NOTAPP (-1)
+static int ip6_select_src_expensive_secondary_if = 0;
+SYSCTL_INT(_net_inet6_ip6, OID_AUTO, select_src_expensive_secondary_if,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_select_src_expensive_secondary_if, 0,
+ "allow source interface selection to use expensive secondaries");
+
+static int ip6_select_src_strong_end = 1;
+SYSCTL_INT(_net_inet6_ip6, OID_AUTO, select_src_strong_end,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_select_src_strong_end, 0,
+ "limit source address selection to outgoing interface");
+
+#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,
- const struct ip6_out_args *ip6oa);
+ 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,
- const struct ip6_out_args *, struct ifnet **);
+ struct ip6_out_args *, struct ifnet **);
static void init_policy_queue(void);
static int add_addrsel_policyent(const struct in6_addrpolicy *);
#ifdef ENABLE_ADDRSEL
static struct in6_addrpolicy *match_addrsel_policy(struct sockaddr_in6 *);
void addrsel_policy_init(void);
+#define SASEL_DO_DBG(inp) \
+ (ip6_select_srcaddr_debug && (inp) != NULL && \
+ (inp)->inp_socket != NULL && \
+ ((inp)->inp_socket->so_options & SO_DEBUG))
+
+#define SASEL_LOG(fmt, ...) \
+do { \
+ if (srcsel_debug) \
+ printf("%s:%d " fmt "\n",\
+ __FUNCTION__, __LINE__, ##__VA_ARGS__); \
+} while (0); \
+
/*
* Return an IPv6 address, which is the most appropriate for a given
* destination and user specified options.
* 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 */ \
- ip6stat.ip6s_sources_rule[(r)]++; \
+#define REPLACE(r) do {\
+ SASEL_LOG("REPLACE r %d ia %s ifp1 %s\n", \
+ (r), s_src, ifp1->if_xname); \
+ srcrule = (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 */ \
- ip6stat.ip6s_sources_rule[(r)]++; \
+} while (0)
+
+#define NEXTSRC(r) do {\
+ SASEL_LOG("NEXTSRC r %d ia %s ifp1 %s\n", \
+ (r), s_src, ifp1->if_xname); \
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 */ \
- ip6stat.ip6s_sources_rule[(r)]++; \
+} while (0)
+
+#define BREAK(r) do { \
+ SASEL_LOG("BREAK r %d ia %s ifp1 %s\n", \
+ (r), s_src, ifp1->if_xname); \
+ srcrule = (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,
- struct ifnet **ifpp, struct in6_addr *src_storage, unsigned int ifscope,
- int *errorp)
+in6_selectsrc_core(struct sockaddr_in6 *dstsock, uint32_t hint_mask,
+ struct ifnet *ifp, int srcsel_debug, struct in6_addr *src_storage,
+ struct ifnet **sifp, int *errorp, struct ifaddr **ifapp)
{
+ u_int32_t odstzone;
+ int bestrule = IP6S_SRCRULE_0;
+ struct in6_addrpolicy *dst_policy = NULL, *best_policy = NULL;
struct in6_addr dst;
- struct ifnet *ifp = NULL;
struct in6_ifaddr *ia = NULL, *ia_best = NULL;
- struct in6_pktinfo *pi = NULL;
+ char s_src[MAX_IPv6_STR_LEN] = {0};
+ char s_dst[MAX_IPv6_STR_LEN] = {0};
+ const struct in6_addr *tmp = NULL;
int dst_scope = -1, best_scope = -1, best_matchlen = -1;
- struct in6_addrpolicy *dst_policy = NULL, *best_policy = NULL;
- u_int32_t odstzone;
- int prefer_tempaddr;
- struct ip6_moptions *mopts;
- struct timeval timenow;
- struct ip6_out_args ip6oa = { ifscope, { 0 }, IP6OAF_SELECT_SRCIF };
- boolean_t islocal = FALSE;
-
- getmicrotime(&timenow);
+ uint64_t secs = net_uptime();
+ VERIFY(dstsock != NULL);
+ VERIFY(src_storage != NULL);
+ VERIFY(ifp != NULL);
- dst = dstsock->sin6_addr; /* make a copy for local operation */
- *errorp = 0;
- if (ifpp != NULL)
- *ifpp = NULL;
-
- if (inp != NULL) {
- mopts = inp->in6p_moptions;
- if (inp->inp_flags & INP_NO_IFT_CELLULAR)
- ip6oa.ip6oa_flags |= IP6OAF_NO_CELLULAR;
- } else {
- mopts = NULL;
- }
-
- 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
- * assigned to the node, and can be used as the packet's source
- * address. If everything is okay, use the address as source.
- */
- if (opts && (pi = opts->ip6po_pktinfo) &&
- !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) {
- struct sockaddr_in6 srcsock;
- struct in6_ifaddr *ia6;
-
- /* get the outgoing interface */
- if ((*errorp = in6_selectif(dstsock, opts, mopts, ro, &ip6oa,
- &ifp)) != 0) {
- src_storage = NULL;
- goto done;
- }
-
- /*
- * determine the appropriate zone id of the source based on
- * the zone of the destination and the outgoing interface.
- * If the specified address is ambiguous wrt the scope zone,
- * the interface must be specified; otherwise, ifa_ifwithaddr()
- * will fail matching the address.
- */
- bzero(&srcsock, sizeof(srcsock));
- srcsock.sin6_family = AF_INET6;
- srcsock.sin6_len = sizeof(srcsock);
- srcsock.sin6_addr = pi->ipi6_addr;
- if (ifp != NULL) {
- *errorp = in6_setscope(&srcsock.sin6_addr, ifp, NULL);
- if (*errorp != 0) {
- src_storage = NULL;
- goto done;
- }
- }
- ia6 = (struct in6_ifaddr *)ifa_ifwithaddr((struct sockaddr *)
- (&srcsock));
- if (ia6 == NULL) {
- *errorp = EADDRNOTAVAIL;
- src_storage = NULL;
- goto done;
- }
- IFA_LOCK_SPIN(&ia6->ia_ifa);
- if ((ia6->ia6_flags & (IN6_IFF_ANYCAST | IN6_IFF_NOTREADY)) ||
- ((ip6oa.ip6oa_flags & IP6OAF_NO_CELLULAR) &&
- (ia6->ia_ifa.ifa_ifp->if_type == IFT_CELLULAR))) {
- IFA_UNLOCK(&ia6->ia_ifa);
- IFA_REMREF(&ia6->ia_ifa);
- *errorp = EADDRNOTAVAIL;
- src_storage = NULL;
- goto done;
- }
+ if (sifp != NULL)
+ *sifp = NULL;
- *src_storage = satosin6(&ia6->ia_addr)->sin6_addr;
- IFA_UNLOCK(&ia6->ia_ifa);
- IFA_REMREF(&ia6->ia_ifa);
- goto done;
- }
+ if (ifapp != NULL)
+ *ifapp = NULL;
- /*
- * Otherwise, if the socket has already bound the source, just use it.
- */
- if (inp != NULL && !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
- src_storage = &inp->in6p_laddr;
- goto done;
- }
+ dst = dstsock->sin6_addr; /* make a copy for local operation */
- /*
- * If the address is not specified, choose the best one based on
- * the outgoing interface and the destination address.
- */
+ if (srcsel_debug) {
+ (void) inet_ntop(AF_INET6, &dst, s_dst, sizeof (s_src));
- /* get the outgoing interface */
- if ((*errorp = in6_selectif(dstsock, opts, mopts, ro, &ip6oa,
- &ifp)) != 0) {
- src_storage = NULL;
- goto done;
+ tmp = &in6addr_any;
+ (void) inet_ntop(AF_INET6, tmp, s_src, sizeof (s_src));
+ printf("%s out src %s dst %s ifp %s\n",
+ __func__, s_src, s_dst, ifp->if_xname);
}
*errorp = in6_setscope(&dst, ifp, &odstzone);
src_storage = NULL;
goto done;
}
- lck_rw_lock_shared(&in6_ifaddr_rwlock);
+ lck_rw_lock_shared(&in6_ifaddr_rwlock);
for (ia = in6_ifaddrs; ia; ia = ia->ia_next) {
int new_scope = -1, new_matchlen = -1;
struct in6_addrpolicy *new_policy = NULL;
- u_int32_t srczone, osrczone, dstzone;
+ u_int32_t srczone = 0, osrczone, dstzone;
struct in6_addr src;
struct ifnet *ifp1 = ia->ia_ifp;
+ int srcrule;
+
+ if (srcsel_debug)
+ (void) inet_ntop(AF_INET6, &ia->ia_addr.sin6_addr,
+ s_src, sizeof (s_src));
IFA_LOCK(&ia->ia_ifa);
+
+ /*
+ * XXX By default we are strong end system and will
+ * limit candidate set of source address to the ones
+ * configured on the outgoing interface.
+ */
+ if (ip6_select_src_strong_end &&
+ ifp1 != ifp) {
+ SASEL_LOG("NEXT ia %s ifp1 %s address is not on outgoing "
+ "interface \n", s_src, ifp1->if_xname);
+ goto next;
+ }
+
/*
* We'll never take an address that breaks the scope zone
- * of the destination. We also skip an address if its zone
+ * of the destination. We also skip an address if its zone
* does not contain the outgoing interface.
* XXX: we should probably use sin6_scope_id here.
*/
if (in6_setscope(&dst, ifp1, &dstzone) ||
- odstzone != dstzone)
+ odstzone != dstzone) {
+ SASEL_LOG("NEXT ia %s ifp1 %s odstzone %d != dstzone %d\n",
+ s_src, ifp1->if_xname, odstzone, dstzone);
goto next;
-
+ }
src = ia->ia_addr.sin6_addr;
if (in6_setscope(&src, ifp, &osrczone) ||
in6_setscope(&src, ifp1, &srczone) ||
- osrczone != srczone)
+ osrczone != srczone) {
+ SASEL_LOG("NEXT ia %s ifp1 %s osrczone %d != srczone %d\n",
+ s_src, ifp1->if_xname, osrczone, srczone);
goto next;
-
+ }
/* 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))) {
+ SASEL_LOG("NEXT ia %s ifp1 %s ia6_flags 0x%x\n",
+ s_src, ifp1->if_xname, ia->ia6_flags);
goto next;
-
- if (!ip6_use_deprecated && IFA6_IS_DEPRECATED(ia))
+ }
+ if (!ip6_use_deprecated && IFA6_IS_DEPRECATED(ia, secs)) {
+ SASEL_LOG("NEXT ia %s ifp1 %s IFA6_IS_DEPRECATED\n",
+ s_src, ifp1->if_xname);
goto next;
-
+ }
if (!nd6_optimistic_dad &&
- (ia->ia6_flags & IN6_IFF_OPTIMISTIC) != 0)
+ (ia->ia6_flags & IN6_IFF_OPTIMISTIC) != 0) {
+ SASEL_LOG("NEXT ia %s ifp1 %s IN6_IFF_OPTIMISTIC\n",
+ s_src, ifp1->if_xname);
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
*/
if ((ia_best->ia6_flags & IN6_IFF_OPTIMISTIC) == 0 &&
(ia->ia6_flags & IN6_IFF_OPTIMISTIC) != 0)
- NEXTSRC(3);
+ NEXTSRC(IP6S_SRCRULE_3);
if ((ia_best->ia6_flags & IN6_IFF_OPTIMISTIC) != 0 &&
(ia->ia6_flags & IN6_IFF_OPTIMISTIC) == 0)
- REPLACE(3);
+ 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);
- if (ia_best->ia_ifp != ifp && ia->ia_ifp == ifp)
- REPLACE(5);
+ /*
+ * XXX By default we are strong end with source address
+ * selection. That means all address selection candidate
+ * addresses will be the ones hosted on the outgoing interface
+ * making the following check redundant.
+ */
+ if (ip6_select_src_strong_end == 0) {
+ if (ia_best->ia_ifp == ifp && ia->ia_ifp != ifp)
+ NEXTSRC(IP6S_SRCRULE_5);
+ if (ia_best->ia_ifp != ifp && ia->ia_ifp == ifp)
+ REPLACE(IP6S_SRCRULE_5);
+ }
/*
* 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.
- * Don't use temporary addresses for local destinations or
- * for multicast addresses unless we were passed in an option.
+ * a sysctl variable, so that transparency conscious users can
+ * always prefer stable addresses.
*/
- if (IN6_IS_ADDR_MULTICAST(&dst) ||
- in6_matchlen(&ia_best->ia_addr.sin6_addr, &dst) >=
- in6_mask2len(&ia_best->ia_prefixmask.sin6_addr, NULL))
- islocal = TRUE;
- if (opts == NULL ||
- opts->ip6po_prefer_tempaddr == IP6PO_TEMPADDR_SYSTEM) {
- prefer_tempaddr = islocal ? 0 : ip6_prefer_tempaddr;
- } else if (opts->ip6po_prefer_tempaddr ==
- IP6PO_TEMPADDR_NOTPREFER) {
- prefer_tempaddr = 0;
- } else
- prefer_tempaddr = 1;
if (!(ia_best->ia6_flags & IN6_IFF_TEMPORARY) &&
(ia->ia6_flags & IN6_IFF_TEMPORARY)) {
- if (prefer_tempaddr)
- REPLACE(7);
+ if (hint_mask & IPV6_SRCSEL_HINT_PREFER_TMPADDR)
+ 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);
+ if (hint_mask & IPV6_SRCSEL_HINT_PREFER_TMPADDR)
+ 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.
* Or, do we need more rules?
*/
+ if (ifp1 != ifp && (ifp1->if_eflags & IFEF_EXPENSIVE) &&
+ ip6_select_src_expensive_secondary_if == 0) {
+ SASEL_LOG("NEXT ia %s ifp1 %s IFEF_EXPENSIVE\n",
+ s_src, ifp1->if_xname);
+ ip6stat.ip6s_sources_skip_expensive_secondary_if++;
+ goto next;
+ }
+ SASEL_LOG("NEXT ia %s ifp1 %s last resort\n",
+ s_src, ifp1->if_xname);
IFA_UNLOCK(&ia->ia_ifa);
continue;
replace:
+ /*
+ * Ignore addresses on secondary interfaces that are marked
+ * expensive
+ */
+ if (ifp1 != ifp && (ifp1->if_eflags & IFEF_EXPENSIVE) &&
+ ip6_select_src_expensive_secondary_if == 0) {
+ SASEL_LOG("NEXT ia %s ifp1 %s IFEF_EXPENSIVE\n",
+ s_src, ifp1->if_xname);
+ ip6stat.ip6s_sources_skip_expensive_secondary_if++;
+ goto next;
+ }
+ bestrule = srcrule;
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));
- IFA_ADDREF_LOCKED(&ia->ia_ifa); /* for ia_best */
+ in6_matchlen(&ia->ia_addr.sin6_addr, &dst));
+ SASEL_LOG("NEXT ia %s ifp1 %s best_scope %d new_scope %d dst_scope %d\n",
+ s_src, ifp1->if_xname, best_scope, new_scope, dst_scope);
+ IFA_ADDREF_LOCKED(&ia->ia_ifa); /* for ia_best */
IFA_UNLOCK(&ia->ia_ifa);
if (ia_best != NULL)
IFA_REMREF(&ia_best->ia_ifa);
continue;
out:
- IFA_ADDREF_LOCKED(&ia->ia_ifa); /* for ia_best */
+ IFA_ADDREF_LOCKED(&ia->ia_ifa); /* for ia_best */
IFA_UNLOCK(&ia->ia_ifa);
if (ia_best != NULL)
IFA_REMREF(&ia_best->ia_ifa);
lck_rw_done(&in6_ifaddr_rwlock);
- if (ia_best != NULL &&
- (ip6oa.ip6oa_flags & IP6OAF_NO_CELLULAR) &&
- ia_best->ia_ifa.ifa_ifp->if_type == IFT_CELLULAR) {
- IFA_REMREF(&ia_best->ia_ifa);
- ia_best = NULL;
- }
-
if ((ia = ia_best) == NULL) {
- *errorp = EADDRNOTAVAIL;
+ if (*errorp == 0)
+ *errorp = EADDRNOTAVAIL;
src_storage = NULL;
goto done;
}
+ if (sifp != NULL) {
+ *sifp = ia->ia_ifa.ifa_ifp;
+ ifnet_reference(*sifp);
+ }
+
IFA_LOCK_SPIN(&ia->ia_ifa);
+ if (bestrule < IP6S_SRCRULE_COUNT)
+ ip6stat.ip6s_sources_rule[bestrule]++;
*src_storage = satosin6(&ia->ia_addr)->sin6_addr;
IFA_UNLOCK(&ia->ia_ifa);
- IFA_REMREF(&ia->ia_ifa);
+
+ if (ifapp != NULL)
+ *ifapp = &ia->ia_ifa;
+ else
+ IFA_REMREF(&ia->ia_ifa);
+
+done:
+ if (srcsel_debug) {
+ (void) inet_ntop(AF_INET6, &dst, s_dst, sizeof (s_src));
+
+ tmp = (src_storage != NULL) ? src_storage : &in6addr_any;
+ (void) inet_ntop(AF_INET6, tmp, s_src, sizeof (s_src));
+
+ printf("%s out src %s dst %s dst_scope %d best_scope %d\n",
+ __func__, s_src, s_dst, dst_scope, best_scope);
+ }
+
+ return (src_storage);
+}
+
+/*
+ * 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,
+ struct ifnet **ifpp, struct in6_addr *src_storage, unsigned int ifscope,
+ int *errorp)
+{
+ struct ifnet *ifp = NULL;
+ struct in6_pktinfo *pi = NULL;
+ struct ip6_moptions *mopts;
+ struct ip6_out_args ip6oa = { ifscope, { 0 }, IP6OAF_SELECT_SRCIF, 0,
+ SO_TC_UNSPEC, _NET_SERVICE_TYPE_UNSPEC };
+ boolean_t inp_debug = FALSE;
+ uint32_t hint_mask = 0;
+ int prefer_tempaddr = 0;
+ struct ifnet *sifp = NULL;
+
+ *errorp = 0;
+ if (ifpp != NULL)
+ *ifpp = NULL;
+
+ if (inp != NULL) {
+ inp_debug = SASEL_DO_DBG(inp);
+ mopts = inp->in6p_moptions;
+ 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;
+ if (INP_INTCOPROC_ALLOWED(inp))
+ ip6oa.ip6oa_flags |= IP6OAF_INTCOPROC_ALLOWED;
+ } else {
+ mopts = NULL;
+ /* Allow the kernel to retransmit packets. */
+ ip6oa.ip6oa_flags |= IP6OAF_INTCOPROC_ALLOWED |
+ IP6OAF_AWDL_UNRESTRICTED;
+ }
+
+ 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
+ * assigned to the node, and can be used as the packet's source
+ * address. If everything is okay, use the address as source.
+ */
+ if (opts && (pi = opts->ip6po_pktinfo) &&
+ !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) {
+ struct sockaddr_in6 srcsock;
+ struct in6_ifaddr *ia6;
+
+ /* get the outgoing interface */
+ if ((*errorp = in6_selectif(dstsock, opts, mopts, ro, &ip6oa,
+ &ifp)) != 0) {
+ src_storage = NULL;
+ goto done;
+ }
+
+ /*
+ * determine the appropriate zone id of the source based on
+ * the zone of the destination and the outgoing interface.
+ * If the specified address is ambiguous wrt the scope zone,
+ * the interface must be specified; otherwise, ifa_ifwithaddr()
+ * will fail matching the address.
+ */
+ bzero(&srcsock, sizeof (srcsock));
+ srcsock.sin6_family = AF_INET6;
+ srcsock.sin6_len = sizeof (srcsock);
+ srcsock.sin6_addr = pi->ipi6_addr;
+ if (ifp != NULL) {
+ *errorp = in6_setscope(&srcsock.sin6_addr, ifp, NULL);
+ if (*errorp != 0) {
+ src_storage = NULL;
+ goto done;
+ }
+ }
+ ia6 = (struct in6_ifaddr *)ifa_ifwithaddr((struct sockaddr *)
+ (&srcsock));
+ if (ia6 == NULL) {
+ *errorp = EADDRNOTAVAIL;
+ src_storage = NULL;
+ goto done;
+ }
+ IFA_LOCK_SPIN(&ia6->ia_ifa);
+ if ((ia6->ia6_flags & (IN6_IFF_ANYCAST | IN6_IFF_NOTREADY)) ||
+ (inp && inp_restricted_send(inp, ia6->ia_ifa.ifa_ifp))) {
+ IFA_UNLOCK(&ia6->ia_ifa);
+ IFA_REMREF(&ia6->ia_ifa);
+ *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);
+ goto done;
+ }
+
+ /*
+ * Otherwise, if the socket has already bound the source, just use it.
+ */
+ 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
+ * the outgoing interface and the destination address.
+ */
+ /* get the outgoing interface */
+ if ((*errorp = in6_selectif(dstsock, opts, mopts, ro, &ip6oa,
+ &ifp)) != 0) {
+ src_storage = NULL;
+ goto done;
+ }
+
+ VERIFY(ifp != NULL);
+
+ if (opts == NULL ||
+ opts->ip6po_prefer_tempaddr == IP6PO_TEMPADDR_SYSTEM) {
+ prefer_tempaddr = ip6_prefer_tempaddr;
+ } else if (opts->ip6po_prefer_tempaddr == IP6PO_TEMPADDR_NOTPREFER) {
+ prefer_tempaddr = 0;
+ } else
+ prefer_tempaddr = 1;
+
+ if (prefer_tempaddr)
+ hint_mask |= IPV6_SRCSEL_HINT_PREFER_TMPADDR;
+
+ if (in6_selectsrc_core(dstsock, hint_mask, ifp, inp_debug, src_storage,
+ &sifp, errorp, NULL) == NULL) {
+ src_storage = NULL;
+ goto done;
+ }
+
+ VERIFY(sifp != NULL);
+
+ if (inp && inp_restricted_send(inp, sifp)) {
+ src_storage = NULL;
+ *errorp = EHOSTUNREACH;
+ ifnet_release(sifp);
+ goto done;
+ } else {
+ ifnet_release(sifp);
+ }
+
done:
if (ifpp != NULL) {
/* if ifp is non-NULL, refcnt held in in6_selectif() */
*/
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, const struct ip6_out_args *ip6oa)
+ int norouteok, struct ip6_out_args *ip6oa)
{
int error = 0;
struct ifnet *ifp = NULL, *ifp0 = 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, proxied_ifa = FALSE;
- unsigned int ifscope = ip6oa->ip6oa_boundif;
-
-#if 0
- char ip6buf[INET6_ADDRSTRLEN];
-
- if (dstsock->sin6_addr.s6_addr32[0] == 0 &&
- 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));
- } else {
- printf("in6_selectroute: destination = %s%%%d\n",
- ip6_sprintf(ip6buf, &dstsock->sin6_addr),
- dstsock->sin6_scope_id); /* for debug */
- }
-#endif
+ boolean_t select_srcif, proxied_ifa = FALSE, local_dst = FALSE;
+ unsigned int ifscope = ((ip6oa != NULL) ?
+ ip6oa->ip6oa_boundif : IFSCOPE_NONE);
if (retifp != NULL)
*retifp = NULL;
* Perform source interface selection only if Scoped Routing
* is enabled and a source address that isn't unspecified.
*/
- select_srcif = (ip6_doscopedroute && srcsock != NULL &&
+ select_srcif = (srcsock != NULL &&
!IN6_IS_ADDR_UNSPECIFIED(&srcsock->sin6_addr));
- /*
- * If Scoped Routing is disabled, ignore the given ifscope.
- * Otherwise even if source selection won't be performed,
- * we still obey IPV6_BOUND_IF.
- */
- if (!ip6_doscopedroute && ifscope != IFSCOPE_NONE)
- ifscope = IFSCOPE_NONE;
+ if (ip6_select_srcif_debug) {
+ printf("%s src %s dst %s ifscope %d select_srcif %d\n",
+ __func__, s_src, s_dst, ifscope, select_srcif);
+ }
/* If the caller specified the outgoing interface explicitly, use it */
if (opts != NULL && (pi = opts->ip6po_pktinfo) != NULL &&
* If the outgoing interface was not set via IPV6_BOUND_IF or
* IPV6_PKTINFO, use the scope ID in the destination address.
*/
- if (ip6_doscopedroute && ifscope == IFSCOPE_NONE)
+ if (ifscope == IFSCOPE_NONE)
ifscope = dstsock->sin6_scope_id;
/*
* 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);
}
if (ip6_select_srcif_debug && ifa != NULL) {
if (ro->ro_rt != NULL) {
- printf("%s->%s ifscope %d->%d ifa_if %s "
- "ro_if %s\n", s_src, s_dst, ifscope,
+ printf("%s %s->%s ifscope %d->%d ifa_if %s "
+ "ro_if %s\n",
+ __func__,
+ s_src, s_dst, ifscope,
scope, if_name(ifa->ifa_ifp),
if_name(rt_ifp));
} else {
- printf("%s->%s ifscope %d->%d ifa_if %s\n",
+ printf("%s %s->%s ifscope %d->%d ifa_if %s\n",
+ __func__,
s_src, s_dst, ifscope, scope,
if_name(ifa->ifa_ifp));
}
* 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) {
- printf("%s->%s ifscope %d ifa_if %s\n",
+ printf("%s %s->%s ifscope %d ifa_if %s\n",
+ __func__,
s_src, s_dst, ifscope, if_name(ifa->ifa_ifp));
+ } else if (ip6_select_srcif_debug) {
+ printf("%s %s->%s ifscope %d ifa_if NULL\n",
+ __func__,
+ s_src, s_dst, ifscope);
}
-
}
getroute:
- if (ifa != NULL && !proxied_ifa)
+ 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 && !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;
}
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 && !proxied_ifa))))) {
- 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);
}
/*
}
}
RT_UNLOCK(route->ro_rt);
- rtfree(route->ro_rt);
- route->ro_rt = NULL;
- route->ro_flags &= ~ROF_SRCIF_SELECTED;
+ ROUTE_RELEASE(route);
error = EHOSTUNREACH;
/* Undo the settings done above */
route = NULL;
if (srcif_selected) {
VERIFY(has_route);
- route->ro_flags |= ROF_SRCIF_SELECTED;
- route->ro_rt->generation_id = route_generation;
+ 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 (error == 0) {
- if ((ip6oa->ip6oa_flags & IP6OAF_NO_CELLULAR) &&
- ((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; /* ditch ifp; keep ifp0 */
- 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_INTCOPROC_ALLOWED) && \
+ IFNET_IS_INTCOPROC(_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++;
/*
*retifp = ifp;
}
+ if (retsrcia != NULL) {
+ if (ifa != NULL)
+ IFA_ADDREF(ifa); /* for caller */
+ *retsrcia = (struct in6_ifaddr *)ifa;
+ }
+
if (error == 0) {
if (retrt != NULL && route != NULL)
*retrt = route->ro_rt; /* ro_rt may be NULL */
- } else if (select_srcif && ip6_select_srcif_debug) {
- printf("%s->%s ifscope %d ifa_if %s ro_if %s (error=%d)\n",
+ }
+ if (ip6_select_srcif_debug) {
+ printf("%s %s->%s ifscope %d ifa_if %s ro_if %s (error=%d)\n",
+ __func__,
s_src, s_dst, ifscope,
(ifa != NULL) ? if_name(ifa->ifa_ifp) : "NONE",
(ifp != NULL) ? if_name(ifp) : "NONE", error);
* 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
+int
in6_selectif(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts,
struct ip6_moptions *mopts, struct route_in6 *ro,
- const struct ip6_out_args *ip6oa, struct ifnet **retifp)
+ struct ip6_out_args *ip6oa, struct ifnet **retifp)
{
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 ((err = selectroute(NULL, dstsock, opts, mopts, ro, retifp,
+ if ((err = selectroute(NULL, dstsock, opts, mopts, NULL, ro, retifp,
&rt, 0, 1, ip6oa)) != 0)
goto done;
}
done:
- if (ro == &sro && rt && rt == sro.ro_rt)
- rtfree(rt);
+ if (ro == &sro) {
+ VERIFY(rt == NULL || rt == ro->ro_rt);
+ ROUTE_RELEASE(ro);
+ }
/*
* retifp might point to a valid ifp with a reference held;
*/
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,
- const struct ip6_out_args *ip6oa)
+ 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,
+ 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);
- } else {
- lck_rw_lock_shared(nd_if_rwlock);
- if (ifp && ifp->if_index < nd_ifinfo_indexlim) {
- u_int8_t chlim;
- struct nd_ifinfo *ndi = &nd_ifinfo[ifp->if_index];
-
- if (ndi->initialized) {
- lck_mtx_lock(&ndi->lock);
- chlim = ndi->chlim;
- lck_mtx_unlock(&ndi->lock);
- } else {
- chlim = ip6_defhlim;
- }
- lck_rw_done(nd_if_rwlock);
- return (chlim);
+ return (in6p->in6p_hops);
+ } else if (NULL != ifp) {
+ u_int8_t chlim;
+ struct nd_ifinfo *ndi = ND_IFINFO(ifp);
+ if (ndi && ndi->initialized) {
+ /* access chlim without lock, for performance */
+ chlim = ndi->chlim;
} else {
- lck_rw_done(nd_if_rwlock);
- return(ip6_defhlim);
+ chlim = ip6_defhlim;
}
+ return (chlim);
}
+
+ 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;
+ bool found;
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
* counting down
*/
count = first - last;
+ found = false;
do {
if (count-- < 0) { /* completely used? */
inp->in6p_laddr = in6addr_any;
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));
+
+ found = in6_pcblookup_local(pcbinfo, &inp->in6p_laddr,
+ lport, wild) == NULL;
+ } while (!found);
} else {
- /*
- * counting up
- */
+ /* counting up */
count = last - first;
+ found = false;
do {
if (count-- < 0) { /* completely used? */
inp->in6p_laddr = in6addr_any;
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));
+
+ found = in6_pcblookup_local(pcbinfo, &inp->in6p_laddr,
+ lport, wild) == NULL;
+ } while (!found);
}
inp->inp_lport = lport;
+ inp->inp_flags |= INP_ANONPORT;
+
if (in_pcbinshash(inp, 1) != 0) {
inp->in6p_laddr = in6addr_any;
- inp->inp_lport = 0;
inp->in6p_last_outifp = NULL;
+
+ inp->inp_lport = 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));
* 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