/*
- * Copyright (c) 2003-2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2003-2016 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/ip6_input.c,v 1.11.2.10 2001/07/24 19:10:18 brooks Exp $ */
-/* $KAME: ip6_input.c,v 1.194 2001/05/27 13:28:35 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* @(#)ip_input.c 8.2 (Berkeley) 1/4/94
*/
-
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
+#include <sys/sysctl.h>
#include <sys/proc.h>
#include <sys/kauth.h>
+#include <sys/mcache.h>
+
+#include <mach/mach_time.h>
+#include <mach/sdt.h>
+#include <pexpert/pexpert.h>
+#include <dev/random/randomdev.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <net/kpi_protocol.h>
+#include <net/ntstat.h>
+#include <net/init.h>
+#include <net/net_osdep.h>
+#include <net/net_perf.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#if INET
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
-#endif /*INET*/
+#endif /* INET */
+#include <netinet/kpi_ipfilter_var.h>
#include <netinet/ip6.h>
#include <netinet6/in6_var.h>
#include <netinet6/ip6_var.h>
#include <netinet/icmp6.h>
#include <netinet6/in6_ifattach.h>
#include <netinet6/nd6.h>
-#include <netinet6/in6_prefix.h>
+#include <netinet6/scope6_var.h>
+#include <netinet6/ip6protosw.h>
#if IPSEC
#include <netinet6/ipsec.h>
-#if INET6
#include <netinet6/ipsec6.h>
-#endif
extern int ipsec_bypass;
-#endif
-
-#include <netinet6/ip6_fw.h>
+#endif /* IPSEC */
-#include <netinet/kpi_ipfilter_var.h>
-
-#include <netinet6/ip6protosw.h>
+#if DUMMYNET
+#include <netinet/ip_fw.h>
+#include <netinet/ip_dummynet.h>
+#endif /* DUMMYNET */
/* we need it for NLOOP. */
#include "loop.h"
-#include "faith.h"
-
-#include <net/net_osdep.h>
#if PF
#include <net/pfvar.h>
#endif /* PF */
-extern struct domain inet6domain;
-extern struct ip6protosw inet6sw[];
-
-struct ip6protosw * ip6_protox[IPPROTO_MAX];
-static int ip6qmaxlen = IFQ_MAXLEN;
-struct in6_ifaddr *in6_ifaddrs;
+struct ip6protosw *ip6_protox[IPPROTO_MAX];
-int ip6_forward_srcrt; /* XXX */
-int ip6_sourcecheck; /* XXX */
-int ip6_sourcecheck_interval; /* XXX */
-const int int6intrq_present = 1;
+static lck_grp_attr_t *in6_ifaddr_rwlock_grp_attr;
+static lck_grp_t *in6_ifaddr_rwlock_grp;
+static lck_attr_t *in6_ifaddr_rwlock_attr;
+decl_lck_rw_data(, in6_ifaddr_rwlock);
-int ip6_ours_check_algorithm;
-int in6_init2done = 0;
+/* Protected by in6_ifaddr_rwlock */
+struct in6_ifaddr *in6_ifaddrs = NULL;
+#define IN6_IFSTAT_REQUIRE_ALIGNED_64(f) \
+ _CASSERT(!(offsetof(struct in6_ifstat, f) % sizeof (uint64_t)))
-/* firewall hooks */
-ip6_fw_chk_t *ip6_fw_chk_ptr;
-ip6_fw_ctl_t *ip6_fw_ctl_ptr;
-int ip6_fw_enable = 1;
+#define ICMP6_IFSTAT_REQUIRE_ALIGNED_64(f) \
+ _CASSERT(!(offsetof(struct icmp6_ifstat, f) % sizeof (uint64_t)))
struct ip6stat ip6stat;
-#ifdef __APPLE__
-struct ifqueue ip6intrq;
-lck_mtx_t *ip6_mutex;
-lck_mtx_t *dad6_mutex;
-lck_mtx_t *nd6_mutex;
-lck_mtx_t *prefix6_mutex;
-lck_mtx_t *scope6_mutex;
-lck_attr_t *ip6_mutex_attr;
-lck_grp_t *ip6_mutex_grp;
-lck_grp_attr_t *ip6_mutex_grp_attr;
-extern lck_mtx_t *inet6_domain_mutex;
+decl_lck_mtx_data(, proxy6_lock);
+decl_lck_mtx_data(static, dad6_mutex_data);
+decl_lck_mtx_data(static, nd6_mutex_data);
+decl_lck_mtx_data(static, prefix6_mutex_data);
+lck_mtx_t *dad6_mutex = &dad6_mutex_data;
+lck_mtx_t *nd6_mutex = &nd6_mutex_data;
+lck_mtx_t *prefix6_mutex = &prefix6_mutex_data;
+#ifdef ENABLE_ADDRSEL
+decl_lck_mtx_data(static, addrsel_mutex_data);
+lck_mtx_t *addrsel_mutex = &addrsel_mutex_data;
#endif
-extern int loopattach_done;
+static lck_attr_t *ip6_mutex_attr;
+static lck_grp_t *ip6_mutex_grp;
+static lck_grp_attr_t *ip6_mutex_grp_attr;
-static void ip6_init2(void *);
-static struct ip6aux *ip6_setdstifaddr(struct mbuf *, struct in6_ifaddr *);
+extern int loopattach_done;
+extern void addrsel_policy_init(void);
+static int sysctl_reset_ip6_input_stats SYSCTL_HANDLER_ARGS;
+static int sysctl_ip6_input_measure_bins SYSCTL_HANDLER_ARGS;
+static int sysctl_ip6_input_getperf SYSCTL_HANDLER_ARGS;
+static void ip6_init_delayed(void);
static int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *);
-#if PULLDOWN_TEST
-static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int);
-#endif
-#ifdef __APPLE__
-void gifattach(void);
-void faithattach(void);
-void stfattach(void);
-#endif
+#if NSTF
+extern void stfattach(void);
+#endif /* NSTF */
+
+SYSCTL_DECL(_net_inet6_ip6);
+
+static uint32_t ip6_adj_clear_hwcksum = 0;
+SYSCTL_UINT(_net_inet6_ip6, OID_AUTO, adj_clear_hwcksum,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_adj_clear_hwcksum, 0,
+ "Invalidate hwcksum info when adjusting length");
-extern lck_mtx_t *domain_proto_mtx;
+static int ip6_input_measure = 0;
+SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, input_perf,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &ip6_input_measure, 0, sysctl_reset_ip6_input_stats, "I", "Do time measurement");
+static uint64_t ip6_input_measure_bins = 0;
+SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, input_perf_bins,
+ CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_input_measure_bins, 0,
+ sysctl_ip6_input_measure_bins, "I",
+ "bins for chaining performance data histogram");
+
+static net_perf_t net_perf;
+SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, input_perf_data,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
+ 0, 0, sysctl_ip6_input_getperf, "S,net_perf",
+ "IP6 input performance data (struct net_perf, net/net_perf.h)");
+
+/*
+ * On platforms which require strict alignment (currently for anything but
+ * i386 or x86_64), check if the IP header pointer is 32-bit aligned; if not,
+ * copy the contents of the mbuf chain into a new chain, and free the original
+ * one. Create some head room in the first mbuf of the new chain, in case
+ * it's needed later on.
+ *
+ * RFC 2460 says that IPv6 headers are 64-bit aligned, but network interfaces
+ * mostly align to 32-bit boundaries. Care should be taken never to use 64-bit
+ * load/store operations on the fields in IPv6 headers.
+ */
+#if defined(__i386__) || defined(__x86_64__)
+#define IP6_HDR_ALIGNMENT_FIXUP(_m, _ifp, _action) do { } while (0)
+#else /* !__i386__ && !__x86_64__ */
+#define IP6_HDR_ALIGNMENT_FIXUP(_m, _ifp, _action) do { \
+ if (!IP6_HDR_ALIGNED_P(mtod(_m, caddr_t))) { \
+ struct mbuf *_n; \
+ struct ifnet *__ifp = (_ifp); \
+ atomic_add_64(&(__ifp)->if_alignerrs, 1); \
+ if (((_m)->m_flags & M_PKTHDR) && \
+ (_m)->m_pkthdr.pkt_hdr != NULL) \
+ (_m)->m_pkthdr.pkt_hdr = NULL; \
+ _n = m_defrag_offset(_m, max_linkhdr, M_NOWAIT); \
+ if (_n == NULL) { \
+ ip6stat.ip6s_toosmall++; \
+ m_freem(_m); \
+ (_m) = NULL; \
+ _action; \
+ } else { \
+ VERIFY(_n != (_m)); \
+ (_m) = _n; \
+ } \
+ } \
+} while (0)
+#endif /* !__i386__ && !__x86_64__ */
static void
-ip6_proto_input(
- __unused protocol_family_t protocol,
- mbuf_t packet)
+ip6_proto_input(protocol_family_t protocol, mbuf_t packet)
{
+#pragma unused(protocol)
+#if INET
+ struct timeval start_tv;
+ if (ip6_input_measure)
+ net_perf_start_time(&net_perf, &start_tv);
+#endif /* INET */
ip6_input(packet);
+#if INET
+ if (ip6_input_measure) {
+ net_perf_measure_time(&net_perf, &start_tv, 1);
+ net_perf_histogram(&net_perf, 1);
+ }
+#endif /* INET */
}
/*
* All protocols not implemented in kernel go to raw IP6 protocol handler.
*/
void
-ip6_init()
+ip6_init(struct ip6protosw *pp, struct domain *dp)
{
- struct ip6protosw *pr;
- int i;
+ static int ip6_initialized = 0;
+ struct protosw *pr;
struct timeval tv;
+ int i;
+ domain_unguard_t unguard;
-#if DIAGNOSTIC
- if (sizeof(struct protosw) != sizeof(struct ip6protosw))
- panic("sizeof(protosw) != sizeof(ip6protosw)");
-#endif
- pr = (struct ip6protosw *)pffindproto_locked(PF_INET6, IPPROTO_RAW, SOCK_RAW);
- if (pr == 0)
- panic("ip6_init");
+ domain_proto_mtx_lock_assert_held();
+ VERIFY((pp->pr_flags & (PR_INITIALIZED|PR_ATTACHED)) == PR_ATTACHED);
+
+ _CASSERT((sizeof (struct ip6_hdr) +
+ sizeof (struct icmp6_hdr)) <= _MHLEN);
+
+ if (ip6_initialized)
+ return;
+ ip6_initialized = 1;
+
+ pr = pffindproto_locked(PF_INET6, IPPROTO_RAW, SOCK_RAW);
+ if (pr == NULL) {
+ panic("%s: Unable to find [PF_INET6,IPPROTO_RAW,SOCK_RAW]\n",
+ __func__);
+ /* NOTREACHED */
+ }
+
+ /* Initialize the entire ip6_protox[] array to IPPROTO_RAW. */
for (i = 0; i < IPPROTO_MAX; i++)
- ip6_protox[i] = pr;
- for (pr = (struct ip6protosw*)inet6domain.dom_protosw; pr; pr = pr->pr_next) {
- if(!(pr->pr_domain)) continue; /* If uninitialized, skip */
- if (pr->pr_domain->dom_family == PF_INET6 &&
- pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW) {
- ip6_protox[pr->pr_protocol] = pr;
+ ip6_protox[i] = (struct ip6protosw *)pr;
+ /*
+ * Cycle through IP protocols and put them into the appropriate place
+ * in ip6_protox[], skipping protocols IPPROTO_{IP,RAW}.
+ */
+ VERIFY(dp == inet6domain && dp->dom_family == PF_INET6);
+ TAILQ_FOREACH(pr, &dp->dom_protosw, pr_entry) {
+ VERIFY(pr->pr_domain == dp);
+ if (pr->pr_protocol != 0 && pr->pr_protocol != IPPROTO_RAW) {
+ /* Be careful to only index valid IP protocols. */
+ if (pr->pr_protocol < IPPROTO_MAX)
+ ip6_protox[pr->pr_protocol] =
+ (struct ip6protosw *)pr;
}
}
ip6_mutex_grp = lck_grp_alloc_init("ip6", ip6_mutex_grp_attr);
ip6_mutex_attr = lck_attr_alloc_init();
- if ((ip6_mutex = lck_mtx_alloc_init(ip6_mutex_grp, ip6_mutex_attr)) == NULL) {
- panic("ip6_init: can't alloc ip6_mutex\n");
- }
- if ((dad6_mutex = lck_mtx_alloc_init(ip6_mutex_grp, ip6_mutex_attr)) == NULL) {
- panic("ip6_init: can't alloc dad6_mutex\n");
- }
- if ((nd6_mutex = lck_mtx_alloc_init(ip6_mutex_grp, ip6_mutex_attr)) == NULL) {
- panic("ip6_init: can't alloc nd6_mutex\n");
- }
-
- if ((prefix6_mutex = lck_mtx_alloc_init(ip6_mutex_grp, ip6_mutex_attr)) == NULL) {
- panic("ip6_init: can't alloc prefix6_mutex\n");
- }
-
- if ((scope6_mutex = lck_mtx_alloc_init(ip6_mutex_grp, ip6_mutex_attr)) == NULL) {
- panic("ip6_init: can't alloc scope6_mutex\n");
- }
+ lck_mtx_init(dad6_mutex, ip6_mutex_grp, ip6_mutex_attr);
+ lck_mtx_init(nd6_mutex, ip6_mutex_grp, ip6_mutex_attr);
+ lck_mtx_init(prefix6_mutex, ip6_mutex_grp, ip6_mutex_attr);
+ scope6_init(ip6_mutex_grp, ip6_mutex_attr);
+#ifdef ENABLE_ADDRSEL
+ lck_mtx_init(addrsel_mutex, ip6_mutex_grp, ip6_mutex_attr);
+#endif
- inet6domain.dom_flags = DOM_REENTRANT;
+ lck_mtx_init(&proxy6_lock, ip6_mutex_grp, ip6_mutex_attr);
+
+ in6_ifaddr_rwlock_grp_attr = lck_grp_attr_alloc_init();
+ in6_ifaddr_rwlock_grp = lck_grp_alloc_init("in6_ifaddr_rwlock",
+ in6_ifaddr_rwlock_grp_attr);
+ in6_ifaddr_rwlock_attr = lck_attr_alloc_init();
+ lck_rw_init(&in6_ifaddr_rwlock, in6_ifaddr_rwlock_grp,
+ in6_ifaddr_rwlock_attr);
+
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_receive);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_hdrerr);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_toobig);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_noroute);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_addrerr);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_protounknown);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_truncated);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_discard);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_deliver);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_forward);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_request);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_discard);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_fragok);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_fragfail);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_fragcreat);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_reass_reqd);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_reass_ok);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_reass_fail);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_mcast);
+ IN6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_mcast);
+
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_msg);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_error);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_dstunreach);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_adminprohib);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_timeexceed);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_paramprob);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_pkttoobig);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_echo);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_echoreply);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_routersolicit);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_routeradvert);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_neighborsolicit);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_neighboradvert);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_redirect);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_mldquery);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_mldreport);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_in_mlddone);
+
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_msg);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_error);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_dstunreach);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_adminprohib);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_timeexceed);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_paramprob);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_pkttoobig);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_echo);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_echoreply);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_routersolicit);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_routeradvert);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_neighborsolicit);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_neighboradvert);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_redirect);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_mldquery);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_mldreport);
+ ICMP6_IFSTAT_REQUIRE_ALIGNED_64(ifs6_out_mlddone);
+
+ getmicrotime(&tv);
+ ip6_desync_factor =
+ (RandomULong() ^ tv.tv_usec) % MAX_TEMP_DESYNC_FACTOR;
- ip6intrq.ifq_maxlen = ip6qmaxlen;
in6_ifaddr_init();
+ ip6_moptions_init();
nd6_init();
frag6_init();
- icmp6_init();
+ icmp6_init(NULL, dp);
+ addrsel_policy_init();
+
/*
- * in many cases, random() here does NOT return random number
- * as initialization during bootstrap time occur in fixed order.
+ * P2P interfaces often route the local address to the loopback
+ * interface. At this point, lo0 hasn't been initialized yet, which
+ * means that we need to delay the IPv6 configuration of lo0.
*/
- microtime(&tv);
- ip6_flow_seq = random() ^ tv.tv_usec;
- microtime(&tv);
- ip6_desync_factor = (random() ^ tv.tv_usec) % MAX_TEMP_DESYNC_FACTOR;
- timeout(ip6_init2, (caddr_t)0, 1 * hz);
-
- lck_mtx_unlock(domain_proto_mtx);
- proto_register_input(PF_INET6, ip6_proto_input, NULL, 0);
- lck_mtx_lock(domain_proto_mtx);
+ net_init_add(ip6_init_delayed);
+
+ unguard = domain_unguard_deploy();
+ i = proto_register_input(PF_INET6, ip6_proto_input, NULL, 0);
+ if (i != 0) {
+ panic("%s: failed to register PF_INET6 protocol: %d\n",
+ __func__, i);
+ /* NOTREACHED */
+ }
+ domain_unguard_release(unguard);
}
static void
-ip6_init2(
- __unused void *dummy)
+ip6_init_delayed(void)
{
- /*
- * to route local address of p2p link to loopback,
- * assign loopback address first.
- */
- if (loopattach_done == 0) {
- timeout(ip6_init2, (caddr_t)0, 1 * hz);
- return;
- }
- (void) in6_ifattach(lo_ifp, NULL, NULL);
-
-#ifdef __APPLE__
- /* nd6_timer_init */
- timeout(nd6_timer, (caddr_t)0, hz);
-
- /* router renumbering prefix list maintenance */
- timeout(in6_rr_timer, (caddr_t)0, hz);
+ (void) in6_ifattach_prelim(lo_ifp);
/* timer for regeneranation of temporary addresses randomize ID */
- timeout(in6_tmpaddrtimer, (caddr_t)0,
- (ip6_temp_preferred_lifetime - ip6_desync_factor -
- ip6_temp_regen_advance) * hz);
+ timeout(in6_tmpaddrtimer, NULL,
+ (ip6_temp_preferred_lifetime - ip6_desync_factor -
+ ip6_temp_regen_advance) * hz);
-#if NGIF
- gifattach();
-#endif
-#if NFAITH
- faithattach();
-#endif
#if NSTF
stfattach();
-#endif
-#else
- /* nd6_timer_init */
-
- callout_init(&nd6_timer_ch);
- callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
-
- /* router renumbering prefix list maintenance */
- callout_init(&in6_rr_timer_ch);
- callout_reset(&in6_rr_timer_ch, hz, in6_rr_timer, NULL);
-
- /* timer for regeneranation of temporary addresses randomize ID */
- callout_reset(&in6_tmpaddrtimer_ch,
- (ip6_temp_preferred_lifetime - ip6_desync_factor -
- ip6_temp_regen_advance) * hz,
- in6_tmpaddrtimer, NULL);
-#endif
-
- in6_init2done = 1;
+#endif /* NSTF */
}
-#if __FreeBSD__
-/* cheat */
-/* This must be after route_init(), which is now SI_ORDER_THIRD */
-SYSINIT(netinet6init2, SI_SUB_PROTO_DOMAIN, SI_ORDER_MIDDLE, ip6_init2, NULL);
-#endif
-
-/*
- * ip6_forward_rt contains the route entry that was recently used during
- * the forwarding of an IPv6 packet and thus acts as a route cache. Access
- * to this variable is protected by the global lock ip6_mutex.
- */
-static struct route_in6 ip6_forward_rt;
-
void
-ip6_input(m)
- struct mbuf *m;
+ip6_input(struct mbuf *m)
{
struct ip6_hdr *ip6;
- int off = sizeof(struct ip6_hdr), nest;
+ int off = sizeof (struct ip6_hdr), nest;
u_int32_t plen;
u_int32_t rtalert = ~0;
int nxt = 0, ours = 0;
- struct ifnet *deliverifp = NULL;
- ipfilter_t inject_ipfref = 0;
- int seen;
+ struct ifnet *inifp, *deliverifp = NULL;
+ ipfilter_t inject_ipfref = NULL;
+ int seen = 1;
+ struct in6_ifaddr *ia6 = NULL;
+ struct sockaddr_in6 *dst6;
+#if DUMMYNET
+ struct m_tag *tag;
+#endif /* DUMMYNET */
+ struct {
+ struct route_in6 rin6;
+#if DUMMYNET
+ struct ip_fw_args args;
+#endif /* DUMMYNET */
+ } ip6ibz;
+#define rin6 ip6ibz.rin6
+#define args ip6ibz.args
+
+ /* zero out {rin6, args} */
+ bzero(&ip6ibz, sizeof (ip6ibz));
/*
- * No need to proccess packet twice if we've
- * already seen it
+ * Check if the packet we received is valid after interface filter
+ * processing
*/
- inject_ipfref = ipf_get_inject_filter(m);
- if (inject_ipfref != 0) {
- ip6 = mtod(m, struct ip6_hdr *);
- nxt = ip6->ip6_nxt;
- seen = 0;
- goto injectit;
- } else
- seen = 1;
-
+ MBUF_INPUT_CHECK(m, m->m_pkthdr.rcvif);
+ inifp = m->m_pkthdr.rcvif;
+ VERIFY(inifp != NULL);
+
+ /* Perform IP header alignment fixup, if needed */
+ IP6_HDR_ALIGNMENT_FIXUP(m, inifp, return);
+
+ m->m_pkthdr.pkt_flags &= ~PKTF_FORWARDED;
#if IPSEC
/*
* should the inner packet be considered authentic?
* see comment in ah4_input().
*/
- if (m) {
- m->m_flags &= ~M_AUTHIPHDR;
- m->m_flags &= ~M_AUTHIPDGM;
- }
-#endif
+ m->m_flags &= ~M_AUTHIPHDR;
+ m->m_flags &= ~M_AUTHIPDGM;
+#endif /* IPSEC */
/*
* make sure we don't have onion peering information into m_aux.
*/
ip6_delaux(m);
- lck_mtx_lock(ip6_mutex);
+#if DUMMYNET
+ if ((tag = m_tag_locate(m, KERNEL_MODULE_TAG_ID,
+ KERNEL_TAG_TYPE_DUMMYNET, NULL)) != NULL) {
+ struct dn_pkt_tag *dn_tag;
+
+ dn_tag = (struct dn_pkt_tag *)(tag+1);
+
+ args.fwa_pf_rule = dn_tag->dn_pf_rule;
+
+ m_tag_delete(m, tag);
+ }
+
+ if (args.fwa_pf_rule) {
+ ip6 = mtod(m, struct ip6_hdr *); /* In case PF got disabled */
+
+ goto check_with_pf;
+ }
+#endif /* DUMMYNET */
+
+ /*
+ * No need to proccess packet twice if we've already seen it.
+ */
+ inject_ipfref = ipf_get_inject_filter(m);
+ if (inject_ipfref != NULL) {
+ ip6 = mtod(m, struct ip6_hdr *);
+ nxt = ip6->ip6_nxt;
+ seen = 0;
+ goto injectit;
+ } else {
+ seen = 1;
+ }
+
/*
* mbuf statistics
*/
if (m->m_flags & M_EXT) {
- if (m->m_next)
+ if (m->m_next != NULL)
ip6stat.ip6s_mext2m++;
else
ip6stat.ip6s_mext1++;
} else {
-#define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0]))
- if (m->m_next) {
- if (m->m_flags & M_LOOP) {
- ip6stat.ip6s_m2m[ifnet_index(lo_ifp)]++; /* XXX */
- } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
- ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
- else
+#define M2MMAX (sizeof (ip6stat.ip6s_m2m) / sizeof (ip6stat.ip6s_m2m[0]))
+ if (m->m_next != NULL) {
+ if (m->m_pkthdr.pkt_flags & PKTF_LOOP) {
+ /* XXX */
+ ip6stat.ip6s_m2m[ifnet_index(lo_ifp)]++;
+ } else if (inifp->if_index < M2MMAX) {
+ ip6stat.ip6s_m2m[inifp->if_index]++;
+ } else {
ip6stat.ip6s_m2m[0]++;
- } else
+ }
+ } else {
ip6stat.ip6s_m1++;
+ }
#undef M2MMAX
}
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
+ /*
+ * Drop the packet if IPv6 operation is disabled on the interface.
+ */
+ if (inifp->if_eflags & IFEF_IPV6_DISABLED)
+ goto bad;
+
+ in6_ifstat_inc_na(inifp, ifs6_in_receive);
ip6stat.ip6s_total++;
-#ifndef PULLDOWN_TEST
/*
* L2 bridge code and some other code can return mbuf chain
* that does not conform to KAME requirement. too bad.
* XXX: fails to join if interface MTU > MCLBYTES. jumbogram?
*/
- if (m && m->m_next != NULL && m->m_pkthdr.len < MCLBYTES) {
+ if (m->m_next != NULL && m->m_pkthdr.len < MCLBYTES) {
struct mbuf *n;
MGETHDR(n, M_DONTWAIT, MT_HEADER); /* MAC-OK */
n = NULL;
}
}
- if (n == NULL) {
- m_freem(m);
- lck_mtx_unlock(ip6_mutex);
- return; /*ENOBUFS*/
- }
+ if (n == NULL)
+ goto bad;
m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
n->m_len = m->m_pkthdr.len;
m_freem(m);
m = n;
}
- IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr),
- {lck_mtx_unlock(ip6_mutex); return;});
-#endif
+ IP6_EXTHDR_CHECK(m, 0, sizeof (struct ip6_hdr), { goto done; });
- if (m->m_len < sizeof(struct ip6_hdr)) {
- struct ifnet *inifp;
- inifp = m->m_pkthdr.rcvif;
- if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == 0) {
+ if (m->m_len < sizeof (struct ip6_hdr)) {
+ if ((m = m_pullup(m, sizeof (struct ip6_hdr))) == 0) {
ip6stat.ip6s_toosmall++;
in6_ifstat_inc(inifp, ifs6_in_hdrerr);
- lck_mtx_unlock(ip6_mutex);
- return;
+ goto done;
}
}
if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
ip6stat.ip6s_badvers++;
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
+ in6_ifstat_inc(inifp, ifs6_in_hdrerr);
goto bad;
}
ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
- /*
- * Check with the firewall...
- */
- if (ip6_fw_enable && ip6_fw_chk_ptr) {
- u_short port = 0;
- /* If ipfw says divert, we have to just drop packet */
- /* use port as a dummy argument */
- if ((*ip6_fw_chk_ptr)(&ip6, NULL, &port, &m)) {
- m_freem(m);
- m = NULL;
- }
- if (!m) {
- lck_mtx_unlock(ip6_mutex);
- return;
- }
- }
-
/*
* Check against address spoofing/corruption.
*/
+ if (!(m->m_pkthdr.pkt_flags & PKTF_LOOP) &&
+ IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src)) {
+ ip6stat.ip6s_badscope++;
+ in6_ifstat_inc(inifp, ifs6_in_addrerr);
+ goto bad;
+ }
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
/*
* XXX: "badscope" is not very suitable for a multicast source.
*/
ip6stat.ip6s_badscope++;
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
+ in6_ifstat_inc(inifp, ifs6_in_addrerr);
goto bad;
}
- if ((IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) ||
- IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) &&
- (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) {
+ if (IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst) &&
+ !(m->m_pkthdr.pkt_flags & PKTF_LOOP)) {
+ /*
+ * In this case, the packet should come from the loopback
+ * interface. However, we cannot just check the if_flags,
+ * because ip6_mloopback() passes the "actual" interface
+ * as the outgoing/incoming interface.
+ */
ip6stat.ip6s_badscope++;
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
+ in6_ifstat_inc(inifp, ifs6_in_addrerr);
goto bad;
}
* The following check is not documented in specs. A malicious
* party may be able to use IPv4 mapped addr to confuse tcp/udp stack
* and bypass security checks (act as if it was from 127.0.0.1 by using
- * IPv6 src ::ffff:127.0.0.1). Be cautious.
+ * IPv6 src ::ffff:127.0.0.1). Be cautious.
*
* This check chokes if we are in an SIIT cloud. As none of BSDs
* support IPv4-less kernel compilation, we cannot support SIIT
* environment at all. So, it makes more sense for us to reject any
* malicious packets for non-SIIT environment, than try to do a
- * partical support for SIIT environment.
+ * partial support for SIIT environment.
*/
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
ip6stat.ip6s_badscope++;
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
+ in6_ifstat_inc(inifp, ifs6_in_addrerr);
goto bad;
}
#if 0
if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
ip6stat.ip6s_badscope++;
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
+ in6_ifstat_inc(inifp, ifs6_in_addrerr);
goto bad;
}
#endif
+ /*
+ * Naively assume we can attribute inbound data to the route we would
+ * use to send to this destination. Asymetric routing breaks this
+ * assumption, but it still allows us to account for traffic from
+ * a remote node in the routing table.
+ * this has a very significant performance impact so we bypass
+ * if nstat_collect is disabled. We may also bypass if the
+ * protocol is tcp in the future because tcp will have a route that
+ * we can use to attribute the data to. That does mean we would not
+ * account for forwarded tcp traffic.
+ */
+ if (nstat_collect) {
+ struct rtentry *rte =
+ ifnet_cached_rtlookup_inet6(inifp, &ip6->ip6_src);
+ if (rte != NULL) {
+ nstat_route_rx(rte, 1, m->m_pkthdr.len, 0);
+ rtfree(rte);
+ }
+ }
+
+ /* for consistency */
+ m->m_pkthdr.pkt_proto = ip6->ip6_nxt;
+
+#if DUMMYNET
+check_with_pf:
+#endif /* DUMMYNET */
#if PF
/* Invoke inbound packet filter */
- lck_mtx_unlock(ip6_mutex);
- if (pf_af_hook(m->m_pkthdr.rcvif, NULL, &m, AF_INET6, TRUE) != 0) {
- if (m != NULL) {
- panic("%s: unexpected packet %p\n", __func__, m);
- /* NOTREACHED */
+ if (PF_IS_ENABLED) {
+ int error;
+#if DUMMYNET
+ error = pf_af_hook(inifp, NULL, &m, AF_INET6, TRUE, &args);
+#else /* !DUMMYNET */
+ error = pf_af_hook(inifp, NULL, &m, AF_INET6, TRUE, NULL);
+#endif /* !DUMMYNET */
+ if (error != 0 || m == NULL) {
+ if (m != NULL) {
+ panic("%s: unexpected packet %p\n",
+ __func__, m);
+ /* NOTREACHED */
+ }
+ /* Already freed by callee */
+ goto done;
}
- /* Already freed by callee */
- return;
+ ip6 = mtod(m, struct ip6_hdr *);
}
- ip6 = mtod(m, struct ip6_hdr *);
- lck_mtx_lock(ip6_mutex);
#endif /* PF */
/* drop packets if interface ID portion is already filled */
- if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) {
+ if (!(inifp->if_flags & IFF_LOOPBACK) &&
+ !(m->m_pkthdr.pkt_flags & PKTF_LOOP)) {
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src) &&
ip6->ip6_src.s6_addr16[1]) {
ip6stat.ip6s_badscope++;
goto bad;
}
- if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst) &&
+ if (IN6_IS_SCOPE_EMBED(&ip6->ip6_dst) &&
ip6->ip6_dst.s6_addr16[1]) {
ip6stat.ip6s_badscope++;
goto bad;
}
}
- if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src))
- ip6->ip6_src.s6_addr16[1]
- = htons(m->m_pkthdr.rcvif->if_index);
- if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst))
- ip6->ip6_dst.s6_addr16[1]
- = htons(m->m_pkthdr.rcvif->if_index);
-
-#if 0 /* this case seems to be unnecessary. (jinmei, 20010401) */
- /*
- * We use rt->rt_ifp to determine if the address is ours or not.
- * If rt_ifp is lo0, the address is ours.
- * The problem here is, rt->rt_ifp for fe80::%lo0/64 is set to lo0,
- * so any address under fe80::%lo0/64 will be mistakenly considered
- * local. The special case is supplied to handle the case properly
- * by actually looking at interface addresses
- * (using in6ifa_ifpwithaddr).
- */
- if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) != 0 &&
- IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) {
- struct in6_ifaddr *ia6;
- if (!(ia6 = in6ifa_ifpwithaddr(m->m_pkthdr.rcvif, &ip6->ip6_dst))) {
- lck_mtx_unlock(ip6_mutex);
- icmp6_error(m, ICMP6_DST_UNREACH,
- ICMP6_DST_UNREACH_ADDR, 0);
- /* m is already freed */
- return;
- }
- ifafree(&ia6->ia_ifa);
-
- ours = 1;
- deliverifp = m->m_pkthdr.rcvif;
- goto hbhcheck;
+ if (m->m_pkthdr.pkt_flags & PKTF_IFAINFO) {
+ if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src))
+ ip6->ip6_src.s6_addr16[1] =
+ htons(m->m_pkthdr.src_ifindex);
+ if (IN6_IS_SCOPE_EMBED(&ip6->ip6_dst))
+ ip6->ip6_dst.s6_addr16[1] =
+ htons(m->m_pkthdr.dst_ifindex);
+ } else {
+ if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src))
+ ip6->ip6_src.s6_addr16[1] = htons(inifp->if_index);
+ if (IN6_IS_SCOPE_EMBED(&ip6->ip6_dst))
+ ip6->ip6_dst.s6_addr16[1] = htons(inifp->if_index);
}
-#endif
/*
* Multicast check
*/
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
- struct in6_multi *in6m = 0;
- struct ifnet *ifp = m->m_pkthdr.rcvif;
+ struct in6_multi *in6m = NULL;
- in6_ifstat_inc(ifp, ifs6_in_mcast);
+ in6_ifstat_inc_na(inifp, ifs6_in_mcast);
/*
* See if we belong to the destination multicast group on the
* arrival interface.
*/
- ifnet_lock_shared(ifp);
- IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m);
- ifnet_lock_done(ifp);
- if (in6m)
+ in6_multihead_lock_shared();
+ IN6_LOOKUP_MULTI(&ip6->ip6_dst, inifp, in6m);
+ in6_multihead_lock_done();
+ if (in6m != NULL) {
+ IN6M_REMREF(in6m);
ours = 1;
- else if (!ip6_mrouter) {
+ } else if (!nd6_prproxy) {
ip6stat.ip6s_notmember++;
ip6stat.ip6s_cantforward++;
- in6_ifstat_inc(ifp, ifs6_in_discard);
+ in6_ifstat_inc(inifp, ifs6_in_discard);
goto bad;
}
- deliverifp = ifp;
+ deliverifp = inifp;
+ VERIFY(ia6 == NULL);
goto hbhcheck;
}
- if (ip6_forward_rt.ro_rt != NULL)
- RT_LOCK(ip6_forward_rt.ro_rt);
/*
- * Unicast check
+ * Unicast check
+ *
+ * Fast path: see if the target is ourselves.
*/
- if (ip6_forward_rt.ro_rt != NULL &&
- (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) &&
- IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
- &((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr) &&
- ip6_forward_rt.ro_rt->generation_id == route_generation) {
- ip6stat.ip6s_forward_cachehit++;
- } else {
- struct sockaddr_in6 *dst6;
-
- if (ip6_forward_rt.ro_rt != NULL) {
- /* route is down/stale or destination is different */
- ip6stat.ip6s_forward_cachemiss++;
- RT_UNLOCK(ip6_forward_rt.ro_rt);
- rtfree(ip6_forward_rt.ro_rt);
- ip6_forward_rt.ro_rt = NULL;
+ lck_rw_lock_shared(&in6_ifaddr_rwlock);
+ for (ia6 = in6_ifaddrs; ia6 != NULL; ia6 = ia6->ia_next) {
+ /*
+ * No reference is held on the address, as we just need
+ * to test for a few things while holding the RW lock.
+ */
+ if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &ip6->ip6_dst))
+ break;
+ }
+
+ if (ia6 != NULL) {
+ /*
+ * For performance, test without acquiring the address lock;
+ * a lot of things in the address are set once and never
+ * changed (e.g. ia_ifp.)
+ */
+ if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
+ /* this address is ready */
+ ours = 1;
+ deliverifp = ia6->ia_ifp;
+ /*
+ * record dst address information into mbuf.
+ */
+ (void) ip6_setdstifaddr_info(m, 0, ia6);
+ lck_rw_done(&in6_ifaddr_rwlock);
+ goto hbhcheck;
}
+ lck_rw_done(&in6_ifaddr_rwlock);
+ ia6 = NULL;
+ /* address is not ready, so discard the packet. */
+ nd6log((LOG_INFO, "%s: packet to an unready address %s->%s\n",
+ __func__, ip6_sprintf(&ip6->ip6_src),
+ ip6_sprintf(&ip6->ip6_dst)));
+ goto bad;
+ }
+ lck_rw_done(&in6_ifaddr_rwlock);
- bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
- dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst;
- dst6->sin6_len = sizeof(struct sockaddr_in6);
- dst6->sin6_family = AF_INET6;
- dst6->sin6_addr = ip6->ip6_dst;
-#if SCOPEDROUTING
- ip6_forward_rt.ro_dst.sin6_scope_id =
- in6_addr2scopeid(m->m_pkthdr.rcvif, &ip6->ip6_dst);
-#endif
+ /*
+ * Slow path: route lookup.
+ */
+ dst6 = SIN6(&rin6.ro_dst);
+ dst6->sin6_len = sizeof (struct sockaddr_in6);
+ dst6->sin6_family = AF_INET6;
+ dst6->sin6_addr = ip6->ip6_dst;
- rtalloc_ign((struct route *)&ip6_forward_rt, RTF_PRCLONING);
- if (ip6_forward_rt.ro_rt != NULL)
- RT_LOCK(ip6_forward_rt.ro_rt);
- }
+ rtalloc_scoped_ign((struct route *)&rin6,
+ RTF_PRCLONING, IFSCOPE_NONE);
+ if (rin6.ro_rt != NULL)
+ RT_LOCK_SPIN(rin6.ro_rt);
-#define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
+#define rt6_key(r) (SIN6((r)->rt_nodes->rn_key))
/*
* Accept the packet if the forwarding interface to the destination
* while it would be less efficient. Or, should we rather install a
* reject route for such a case?
*/
- if (ip6_forward_rt.ro_rt != NULL &&
- (ip6_forward_rt.ro_rt->rt_flags &
- (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
+ if (rin6.ro_rt != NULL &&
+ (rin6.ro_rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
#if RTF_WASCLONED
- !(ip6_forward_rt.ro_rt->rt_flags & RTF_WASCLONED) &&
+ !(rin6.ro_rt->rt_flags & RTF_WASCLONED) &&
#endif
-#if 0
- /*
- * The check below is redundant since the comparison of
- * the destination and the key of the rtentry has
- * already done through looking up the routing table.
- */
- IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
- &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr)
-#endif
- ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
- struct in6_ifaddr *ia6 =
- (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
-
+ rin6.ro_rt->rt_ifp->if_type == IFT_LOOP) {
+ ia6 = (struct in6_ifaddr *)rin6.ro_rt->rt_ifa;
/*
- * record address information into m_aux.
- */
- (void)ip6_setdstifaddr(m, ia6);
-
- /*
- * packets to a tentative, duplicated, or somehow invalid
+ * Packets to a tentative, duplicated, or somehow invalid
* address must not be accepted.
+ *
+ * For performance, test without acquiring the address lock;
+ * a lot of things in the address are set once and never
+ * changed (e.g. ia_ifp.)
*/
if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
/* this address is ready */
ours = 1;
deliverifp = ia6->ia_ifp; /* correct? */
- /* Count the packet in the ip address stats */
-#ifndef __APPLE__
-
- ia6->ia_ifa.if_ipackets++;
- ia6->ia_ifa.if_ibytes += m->m_pkthdr.len;
-#endif
- RT_UNLOCK(ip6_forward_rt.ro_rt);
+ /*
+ * record dst address information into mbuf.
+ */
+ (void) ip6_setdstifaddr_info(m, 0, ia6);
+ RT_UNLOCK(rin6.ro_rt);
goto hbhcheck;
- } else {
- RT_UNLOCK(ip6_forward_rt.ro_rt);
- /* address is not ready, so discard the packet. */
- nd6log((LOG_INFO,
- "ip6_input: packet to an unready address %s->%s\n",
- ip6_sprintf(&ip6->ip6_src),
- ip6_sprintf(&ip6->ip6_dst)));
- goto bad;
}
+ RT_UNLOCK(rin6.ro_rt);
+ ia6 = NULL;
+ /* address is not ready, so discard the packet. */
+ nd6log((LOG_INFO, "%s: packet to an unready address %s->%s\n",
+ __func__, ip6_sprintf(&ip6->ip6_src),
+ ip6_sprintf(&ip6->ip6_dst)));
+ goto bad;
}
- /*
- * FAITH(Firewall Aided Internet Translator)
- */
-#if defined(NFAITH) && 0 < NFAITH
- if (ip6_keepfaith) {
- if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp
- && ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
- /* XXX do we need more sanity checks? */
- ours = 1;
- deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
- RT_UNLOCK(ip6_forward_rt.ro_rt);
- goto hbhcheck;
- }
- }
-#endif
- if (ip6_forward_rt.ro_rt != NULL)
- RT_UNLOCK(ip6_forward_rt.ro_rt);
+ if (rin6.ro_rt != NULL)
+ RT_UNLOCK(rin6.ro_rt);
/*
* Now there is no reason to process the packet if it's not our own
*/
if (!ip6_forwarding) {
ip6stat.ip6s_cantforward++;
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
+ in6_ifstat_inc(inifp, ifs6_in_discard);
goto bad;
}
- hbhcheck:
+hbhcheck:
/*
- * record address information into m_aux, if we don't have one yet.
+ * record dst address information into mbuf, if we don't have one yet.
* note that we are unable to record it, if the address is not listed
- * as our interface address (e.g. multicast addresses, addresses
- * within FAITH prefixes and such).
+ * as our interface address (e.g. multicast addresses, etc.)
*/
- if (deliverifp && !ip6_getdstifaddr(m)) {
- struct in6_ifaddr *ia6;
-
+ if (deliverifp != NULL && ia6 == NULL) {
ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
- if (ia6) {
- if (!ip6_setdstifaddr(m, ia6)) {
- /*
- * XXX maybe we should drop the packet here,
- * as we could not provide enough information
- * to the upper layers.
- */
- }
- ifafree(&ia6->ia_ifa);
+ if (ia6 != NULL) {
+ (void) ip6_setdstifaddr_info(m, 0, ia6);
+ IFA_REMREF(&ia6->ia_ifa);
}
}
struct ip6_hbh *hbh;
if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
-#if 0 /*touches NULL pointer*/
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
+#if 0 /* touches NULL pointer */
+ in6_ifstat_inc(inifp, ifs6_in_discard);
#endif
- lck_mtx_unlock(ip6_mutex);
- return; /* m have already been freed */
+ goto done; /* m have already been freed */
}
/* adjust pointer */
if (ip6->ip6_plen == 0 && plen == 0) {
/*
* Note that if a valid jumbo payload option is
- * contained, ip6_hoptops_input() must set a valid
- * (non-zero) payload length to the variable plen.
+ * contained, ip6_hopopts_input() must set a valid
+ * (non-zero) payload length to the variable plen.
*/
ip6stat.ip6s_badoptions++;
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
- lck_mtx_unlock(ip6_mutex);
- icmp6_error(m, ICMP6_PARAM_PROB,
- ICMP6_PARAMPROB_HEADER,
- (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
- return;
+ in6_ifstat_inc(inifp, ifs6_in_discard);
+ in6_ifstat_inc(inifp, ifs6_in_hdrerr);
+ icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
+ (caddr_t)&ip6->ip6_plen - (caddr_t)ip6);
+ goto done;
}
-#ifndef PULLDOWN_TEST
/* ip6_hopopts_input() ensures that mbuf is contiguous */
hbh = (struct ip6_hbh *)(ip6 + 1);
-#else
- IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
- sizeof(struct ip6_hbh));
- if (hbh == NULL) {
- ip6stat.ip6s_tooshort++;
- lck_mtx_unlock(ip6_mutex);
- return;
- }
-#endif
nxt = hbh->ip6h_nxt;
/*
- * accept the packet if a router alert option is included
- * and we act as an IPv6 router.
+ * If we are acting as a router and the packet contains a
+ * router alert option, see if we know the option value.
+ * Currently, we only support the option value for MLD, in which
+ * case we should pass the packet to the multicast routing
+ * daemon.
*/
- if (rtalert != ~0 && ip6_forwarding)
- ours = 1;
+ if (rtalert != ~0 && ip6_forwarding) {
+ switch (rtalert) {
+ case IP6OPT_RTALERT_MLD:
+ ours = 1;
+ break;
+ default:
+ /*
+ * RFC2711 requires unrecognized values must be
+ * silently ignored.
+ */
+ break;
+ }
+ }
} else
nxt = ip6->ip6_nxt;
* Trim mbufs if longer than we expect.
* Drop packet if shorter than we expect.
*/
- if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
+ if (m->m_pkthdr.len - sizeof (struct ip6_hdr) < plen) {
ip6stat.ip6s_tooshort++;
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
+ in6_ifstat_inc(inifp, ifs6_in_truncated);
goto bad;
}
- if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
+ if (m->m_pkthdr.len > sizeof (struct ip6_hdr) + plen) {
+ /*
+ * Invalidate hardware checksum info if ip6_adj_clear_hwcksum
+ * is set; useful to handle buggy drivers. Note that this
+ * should not be enabled by default, as we may get here due
+ * to link-layer padding.
+ */
+ if (ip6_adj_clear_hwcksum &&
+ (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) &&
+ !(inifp->if_flags & IFF_LOOPBACK) &&
+ !(m->m_pkthdr.pkt_flags & PKTF_LOOP)) {
+ m->m_pkthdr.csum_flags &= ~CSUM_DATA_VALID;
+ m->m_pkthdr.csum_data = 0;
+ ip6stat.ip6s_adj_hwcsum_clr++;
+ }
+
+ ip6stat.ip6s_adj++;
if (m->m_len == m->m_pkthdr.len) {
- m->m_len = sizeof(struct ip6_hdr) + plen;
- m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
- } else
- m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
+ m->m_len = sizeof (struct ip6_hdr) + plen;
+ m->m_pkthdr.len = sizeof (struct ip6_hdr) + plen;
+ } else {
+ m_adj(m, sizeof (struct ip6_hdr) + plen -
+ m->m_pkthdr.len);
+ }
}
/*
* Forward if desirable.
*/
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
- /*
- * If we are acting as a multicast router, all
- * incoming multicast packets are passed to the
- * kernel-level multicast forwarding function.
- * The packet is returned (relatively) intact; if
- * ip6_mforward() returns a non-zero value, the packet
- * must be discarded, else it may be accepted below.
- */
- if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
- ip6stat.ip6s_cantforward++;
- m_freem(m);
- lck_mtx_unlock(ip6_mutex);
- return;
- }
- if (!ours) {
- m_freem(m);
- lck_mtx_unlock(ip6_mutex);
- return;
+ if (!ours && nd6_prproxy) {
+ /*
+ * If this isn't for us, this might be a Neighbor
+ * Solicitation (dst is solicited-node multicast)
+ * against an address in one of the proxied prefixes;
+ * if so, claim the packet and let icmp6_input()
+ * handle the rest.
+ */
+ ours = nd6_prproxy_isours(m, ip6, NULL, IFSCOPE_NONE);
+ VERIFY(!ours ||
+ (m->m_pkthdr.pkt_flags & PKTF_PROXY_DST));
}
+ if (!ours)
+ goto bad;
} else if (!ours) {
- ip6_forward(m, &ip6_forward_rt, 0, 1);
- lck_mtx_unlock(ip6_mutex);
- return;
- }
+ /*
+ * The unicast forwarding function might return the packet
+ * if we are proxying prefix(es), and if the packet is an
+ * ICMPv6 packet that has failed the zone checks, but is
+ * targetted towards a proxied address (this is optimized by
+ * way of RTF_PROXY test.) If so, claim the packet as ours
+ * and let icmp6_input() handle the rest. The packet's hop
+ * limit value is kept intact (it's not decremented). This
+ * is for supporting Neighbor Unreachability Detection between
+ * proxied nodes on different links (src is link-local, dst
+ * is target address.)
+ */
+ if ((m = ip6_forward(m, &rin6, 0)) == NULL)
+ goto done;
+ VERIFY(rin6.ro_rt != NULL);
+ VERIFY(m->m_pkthdr.pkt_flags & PKTF_PROXY_DST);
+ deliverifp = rin6.ro_rt->rt_ifp;
+ ours = 1;
+ }
ip6 = mtod(m, struct ip6_hdr *);
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
ip6stat.ip6s_badscope++;
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
+ in6_ifstat_inc(inifp, ifs6_in_addrerr);
goto bad;
}
* Tell launch routine the next header
*/
ip6stat.ip6s_delivered++;
- in6_ifstat_inc(deliverifp, ifs6_in_deliver);
+ in6_ifstat_inc_na(deliverifp, ifs6_in_deliver);
- lck_mtx_unlock(ip6_mutex);
injectit:
nest = 0;
+ /*
+ * Perform IP header alignment fixup again, if needed. Note that
+ * we do it once for the outermost protocol, and we assume each
+ * protocol handler wouldn't mess with the alignment afterwards.
+ */
+ IP6_HDR_ALIGNMENT_FIXUP(m, inifp, return);
+
while (nxt != IPPROTO_DONE) {
struct ipfilter *filter;
-
+ int (*pr_input)(struct mbuf **, int *, int);
+
if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
ip6stat.ip6s_toomanyhdr++;
- goto badunlocked;
+ goto bad;
}
/*
*/
if (m->m_pkthdr.len < off) {
ip6stat.ip6s_tooshort++;
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
- goto badunlocked;
- }
-
-#if 0
- /*
- * do we need to do it for every header? yeah, other
- * functions can play with it (like re-allocate and copy).
- */
- mhist = ip6_addaux(m);
- if (mhist && M_TRAILINGSPACE(mhist) >= sizeof(nxt)) {
- hist = mtod(mhist, caddr_t) + mhist->m_len;
- bcopy(&nxt, hist, sizeof(nxt));
- mhist->m_len += sizeof(nxt);
- } else {
- ip6stat.ip6s_toomanyhdr++;
+ in6_ifstat_inc(inifp, ifs6_in_truncated);
goto bad;
}
-#endif
+
#if IPSEC
/*
* note that we do not visit this with protocols with pcb layer
* code - like udp/tcp/raw ip.
*/
- if ((ipsec_bypass == 0) && (ip6_protox[nxt]->pr_flags & PR_LASTHDR) != 0) {
+ if ((ipsec_bypass == 0) &&
+ (ip6_protox[nxt]->pr_flags & PR_LASTHDR) != 0) {
if (ipsec6_in_reject(m, NULL)) {
IPSEC_STAT_INCREMENT(ipsec6stat.in_polvio);
- goto badunlocked;
- }
+ goto bad;
+ }
}
-#endif
+#endif /* IPSEC */
/*
* Call IP filter
*/
- if (!TAILQ_EMPTY(&ipv6_filters)) {
+ if (!TAILQ_EMPTY(&ipv6_filters) && !IFNET_IS_INTCOPROC(inifp)) {
ipf_ref();
TAILQ_FOREACH(filter, &ipv6_filters, ipf_link) {
if (seen == 0) {
- if ((struct ipfilter *)inject_ipfref == filter)
+ if ((struct ipfilter *)inject_ipfref ==
+ filter)
seen = 1;
} else if (filter->ipf_filter.ipf_input) {
errno_t result;
-
+
result = filter->ipf_filter.ipf_input(
- filter->ipf_filter.cookie, (mbuf_t*)&m, off, nxt);
+ filter->ipf_filter.cookie,
+ (mbuf_t *)&m, off, nxt);
if (result == EJUSTRETURN) {
ipf_unref();
- return;
+ goto done;
}
if (result != 0) {
ipf_unref();
- m_freem(m);
- return;
+ goto bad;
}
}
}
ipf_unref();
}
- if (!(ip6_protox[nxt]->pr_flags & PR_PROTOLOCK)) {
+
+ DTRACE_IP6(receive, struct mbuf *, m, struct inpcb *, NULL,
+ struct ip6_hdr *, ip6, struct ifnet *, inifp,
+ struct ip *, NULL, struct ip6_hdr *, ip6);
+
+ if ((pr_input = ip6_protox[nxt]->pr_input) == NULL) {
+ m_freem(m);
+ m = NULL;
+ nxt = IPPROTO_DONE;
+ } else if (!(ip6_protox[nxt]->pr_flags & PR_PROTOLOCK)) {
lck_mtx_lock(inet6_domain_mutex);
- nxt = (*ip6_protox[nxt]->pr_input)(&m, &off);
+ nxt = pr_input(&m, &off, nxt);
lck_mtx_unlock(inet6_domain_mutex);
+ } else {
+ nxt = pr_input(&m, &off, nxt);
}
- else
- nxt = (*ip6_protox[nxt]->pr_input)(&m, &off);
}
+done:
+ ROUTE_RELEASE(&rin6);
return;
- bad:
- lck_mtx_unlock(ip6_mutex);
- badunlocked:
+bad:
m_freem(m);
- return;
+ goto done;
}
-/*
- * set/grab in6_ifaddr correspond to IPv6 destination address.
- * XXX backward compatibility wrapper
- */
-static struct ip6aux *
-ip6_setdstifaddr(struct mbuf *m, struct in6_ifaddr *ia6)
+void
+ip6_setsrcifaddr_info(struct mbuf *m, uint32_t src_idx, struct in6_ifaddr *ia6)
{
- struct ip6aux *n;
+ VERIFY(m->m_flags & M_PKTHDR);
+
+ /*
+ * If the source ifaddr is specified, pick up the information
+ * from there; otherwise just grab the passed-in ifindex as the
+ * caller may not have the ifaddr available.
+ */
+ if (ia6 != NULL) {
+ m->m_pkthdr.pkt_flags |= PKTF_IFAINFO;
+ m->m_pkthdr.src_ifindex = ia6->ia_ifp->if_index;
- n = ip6_addaux(m);
- if (n)
- n->ip6a_dstia6 = ia6;
- return (struct ip6aux *)n; /* NULL if failed to set */
+ /* See IN6_IFF comments in in6_var.h */
+ m->m_pkthdr.src_iff = (ia6->ia6_flags & 0xffff);
+ } else {
+ m->m_pkthdr.src_iff = 0;
+ m->m_pkthdr.src_ifindex = src_idx;
+ if (src_idx != 0)
+ m->m_pkthdr.pkt_flags |= PKTF_IFAINFO;
+ }
}
-struct in6_ifaddr *
-ip6_getdstifaddr(m)
- struct mbuf *m;
+void
+ip6_setdstifaddr_info(struct mbuf *m, uint32_t dst_idx, struct in6_ifaddr *ia6)
{
- struct ip6aux *n;
+ VERIFY(m->m_flags & M_PKTHDR);
+
+ /*
+ * If the destination ifaddr is specified, pick up the information
+ * from there; otherwise just grab the passed-in ifindex as the
+ * caller may not have the ifaddr available.
+ */
+ if (ia6 != NULL) {
+ m->m_pkthdr.pkt_flags |= PKTF_IFAINFO;
+ m->m_pkthdr.dst_ifindex = ia6->ia_ifp->if_index;
- n = ip6_findaux(m);
- if (n)
- return n->ip6a_dstia6;
- else
- return NULL;
+ /* See IN6_IFF comments in in6_var.h */
+ m->m_pkthdr.dst_iff = (ia6->ia6_flags & 0xffff);
+ } else {
+ m->m_pkthdr.dst_iff = 0;
+ m->m_pkthdr.dst_ifindex = dst_idx;
+ if (dst_idx != 0)
+ m->m_pkthdr.pkt_flags |= PKTF_IFAINFO;
+ }
+}
+
+int
+ip6_getsrcifaddr_info(struct mbuf *m, uint32_t *src_idx, uint32_t *ia6f)
+{
+ VERIFY(m->m_flags & M_PKTHDR);
+
+ if (!(m->m_pkthdr.pkt_flags & PKTF_IFAINFO))
+ return (-1);
+
+ if (src_idx != NULL)
+ *src_idx = m->m_pkthdr.src_ifindex;
+
+ if (ia6f != NULL)
+ *ia6f = m->m_pkthdr.src_iff;
+
+ return (0);
+}
+
+int
+ip6_getdstifaddr_info(struct mbuf *m, uint32_t *dst_idx, uint32_t *ia6f)
+{
+ VERIFY(m->m_flags & M_PKTHDR);
+
+ if (!(m->m_pkthdr.pkt_flags & PKTF_IFAINFO))
+ return (-1);
+
+ if (dst_idx != NULL)
+ *dst_idx = m->m_pkthdr.dst_ifindex;
+
+ if (ia6f != NULL)
+ *ia6f = m->m_pkthdr.dst_iff;
+
+ return (0);
}
/*
* included, the real payload length will be stored in plenp.
*/
static int
-ip6_hopopts_input(plenp, rtalertp, mp, offp)
- u_int32_t *plenp;
- u_int32_t *rtalertp; /* XXX: should be stored more smart way */
- struct mbuf **mp;
- int *offp;
+ip6_hopopts_input(uint32_t *plenp, uint32_t *rtalertp, struct mbuf **mp,
+ int *offp)
{
struct mbuf *m = *mp;
int off = *offp, hbhlen;
u_int8_t *opt;
/* validation of the length of the header */
-#ifndef PULLDOWN_TEST
- IP6_EXTHDR_CHECK(m, off, sizeof(*hbh), return -1);
+ IP6_EXTHDR_CHECK(m, off, sizeof (*hbh), return (-1));
hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off);
hbhlen = (hbh->ip6h_len + 1) << 3;
- IP6_EXTHDR_CHECK(m, off, hbhlen, return -1);
+ IP6_EXTHDR_CHECK(m, off, hbhlen, return (-1));
hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off);
-#else
- IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
- sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
- if (hbh == NULL) {
- ip6stat.ip6s_tooshort++;
- return -1;
- }
- hbhlen = (hbh->ip6h_len + 1) << 3;
- IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
- hbhlen);
- if (hbh == NULL) {
- ip6stat.ip6s_tooshort++;
- return -1;
- }
-#endif
off += hbhlen;
- hbhlen -= sizeof(struct ip6_hbh);
- opt = (u_int8_t *)hbh + sizeof(struct ip6_hbh);
+ hbhlen -= sizeof (struct ip6_hbh);
+ opt = (u_int8_t *)hbh + sizeof (struct ip6_hbh);
- if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
- hbhlen, rtalertp, plenp) < 0)
- return(-1);
+ if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof (struct ip6_hbh),
+ hbhlen, rtalertp, plenp) < 0)
+ return (-1);
*offp = off;
*mp = m;
- return(0);
+ return (0);
}
/*
* opthead + hbhlen is located in continuous memory region.
*/
int
-ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
- struct mbuf *m;
- u_int8_t *opthead;
- int hbhlen;
- u_int32_t *rtalertp;
- u_int32_t *plenp;
+ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
+ u_int32_t *rtalertp, u_int32_t *plenp)
{
struct ip6_hdr *ip6;
int optlen = 0;
u_int8_t *opt = opthead;
u_int16_t rtalert_val;
u_int32_t jumboplen;
- const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
+ const int erroff = sizeof (struct ip6_hdr) + sizeof (struct ip6_hbh);
for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
switch (*opt) {
}
optlen = *(opt + 1) + 2;
break;
- case IP6OPT_RTALERT:
+ case IP6OPT_ROUTER_ALERT:
/* XXX may need check for alignment */
if (hbhlen < IP6OPT_RTALERT_LEN) {
ip6stat.ip6s_toosmall++;
}
if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
/* XXX stat */
- lck_mtx_unlock(ip6_mutex);
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_HEADER,
erroff + opt + 1 - opthead);
- lck_mtx_lock(ip6_mutex);
- return(-1);
+ return (-1);
}
optlen = IP6OPT_RTALERT_LEN;
bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
}
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
/* XXX stat */
- lck_mtx_unlock(ip6_mutex);
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_HEADER,
erroff + opt + 1 - opthead);
- lck_mtx_lock(ip6_mutex);
- return(-1);
+ return (-1);
}
optlen = IP6OPT_JUMBO_LEN;
ip6 = mtod(m, struct ip6_hdr *);
if (ip6->ip6_plen) {
ip6stat.ip6s_badoptions++;
- lck_mtx_unlock(ip6_mutex);
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_HEADER,
erroff + opt - opthead);
- lck_mtx_lock(ip6_mutex);
- return(-1);
+ return (-1);
}
/*
* We may see jumbolen in unaligned location, so
* we'd need to perform bcopy().
*/
- bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
+ bcopy(opt + 2, &jumboplen, sizeof (jumboplen));
jumboplen = (u_int32_t)htonl(jumboplen);
#if 1
*/
if (*plenp != 0) {
ip6stat.ip6s_badoptions++;
- lck_mtx_unlock(ip6_mutex);
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_HEADER,
erroff + opt + 2 - opthead);
- lck_mtx_lock(ip6_mutex);
- return(-1);
+ return (-1);
}
#endif
*/
if (jumboplen <= IPV6_MAXPACKET) {
ip6stat.ip6s_badoptions++;
- lck_mtx_unlock(ip6_mutex);
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_HEADER,
erroff + opt + 2 - opthead);
- lck_mtx_lock(ip6_mutex);
- return(-1);
+ return (-1);
}
*plenp = jumboplen;
goto bad;
}
optlen = ip6_unknown_opt(opt, m,
- erroff + opt - opthead, 1);
+ erroff + opt - opthead);
if (optlen == -1) {
- /* ip6_unknown opt unlocked ip6_mutex */
- return(-1);
+ return (-1);
}
optlen += 2;
break;
}
}
- return(0);
+ return (0);
- bad:
+bad:
m_freem(m);
- return(-1);
+ return (-1);
}
/*
* is not continuous in order to return an ICMPv6 error.
*/
int
-ip6_unknown_opt(optp, m, off, locked)
- u_int8_t *optp;
- struct mbuf *m;
- int off;
- int locked;
+ip6_unknown_opt(uint8_t *optp, struct mbuf *m, int off)
{
struct ip6_hdr *ip6;
switch (IP6OPT_TYPE(*optp)) {
case IP6OPT_TYPE_SKIP: /* ignore the option */
- return((int)*(optp + 1));
+ return ((int)*(optp + 1));
+
case IP6OPT_TYPE_DISCARD: /* silently discard */
m_freem(m);
- return(-1);
+ return (-1);
+
case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
ip6stat.ip6s_badoptions++;
- if (locked)
- lck_mtx_unlock(ip6_mutex);
icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
- if (locked)
- lck_mtx_lock(ip6_mutex);
- return(-1);
+ return (-1);
+
case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
ip6stat.ip6s_badoptions++;
ip6 = mtod(m, struct ip6_hdr *);
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
- (m->m_flags & (M_BCAST|M_MCAST)))
+ (m->m_flags & (M_BCAST|M_MCAST))) {
m_freem(m);
- else {
- if (locked)
- lck_mtx_unlock(ip6_mutex);
+ } else {
icmp6_error(m, ICMP6_PARAM_PROB,
- ICMP6_PARAMPROB_OPTION, off);
- if (locked)
- lck_mtx_lock(ip6_mutex);
+ ICMP6_PARAMPROB_OPTION, off);
}
- return(-1);
+ return (-1);
}
m_freem(m); /* XXX: NOTREACHED */
- return(-1);
+ return (-1);
}
/*
* Create the "control" list for this pcb.
- * The function will not modify mbuf chain at all.
+ * These functions will not modify mbuf chain at all.
*
- * with KAME mbuf chain restriction:
+ * With KAME mbuf chain restriction:
* The routine will be called from upper layer handlers like tcp6_input().
* Thus the routine assumes that the caller (tcp6_input) have already
* called IP6_EXTHDR_CHECK() and all the extension headers are located in the
* very first mbuf on the mbuf chain.
+ *
+ * ip6_savecontrol_v4 will handle those options that are possible to be
+ * set on a v4-mapped socket.
+ * ip6_savecontrol will directly call ip6_savecontrol_v4 to handle those
+ * options and handle the v6-only ones itself.
*/
-void
-ip6_savecontrol(in6p, mp, ip6, m)
- struct inpcb *in6p;
- struct mbuf **mp;
- struct ip6_hdr *ip6;
- struct mbuf *m;
+struct mbuf **
+ip6_savecontrol_v4(struct inpcb *inp, struct mbuf *m, struct mbuf **mp,
+ int *v4only)
{
- int rthdr_exist = 0;
+ struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
-#if SO_TIMESTAMP
- if ((in6p->in6p_socket->so_options & SO_TIMESTAMP) != 0) {
+ if ((inp->inp_socket->so_options & SO_TIMESTAMP) != 0) {
struct timeval tv;
- microtime(&tv);
- *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
- SCM_TIMESTAMP, SOL_SOCKET);
- if (*mp) {
- mp = &(*mp)->m_next;
- }
+ getmicrotime(&tv);
+ mp = sbcreatecontrol_mbuf((caddr_t)&tv, sizeof (tv),
+ SCM_TIMESTAMP, SOL_SOCKET, mp);
+ if (*mp == NULL)
+ return (NULL);
}
-#endif
+ if ((inp->inp_socket->so_options & SO_TIMESTAMP_MONOTONIC) != 0) {
+ uint64_t time;
+
+ time = mach_absolute_time();
+ mp = sbcreatecontrol_mbuf((caddr_t)&time, sizeof (time),
+ SCM_TIMESTAMP_MONOTONIC, SOL_SOCKET, mp);
+ if (*mp == NULL)
+ return (NULL);
+ }
+ if ((inp->inp_socket->so_flags & SOF_RECV_TRAFFIC_CLASS) != 0) {
+ int tc = m_get_traffic_class(m);
- /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
- if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
- return;
+ mp = sbcreatecontrol_mbuf((caddr_t)&tc, sizeof (tc),
+ SO_TRAFFIC_CLASS, SOL_SOCKET, mp);
+ if (*mp == NULL)
+ return (NULL);
+ }
+ if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
+ if (v4only != NULL)
+ *v4only = 1;
+ return (mp);
+ }
+
+#define IS2292(inp, x, y) (((inp)->inp_flags & IN6P_RFC2292) ? (x) : (y))
/* RFC 2292 sec. 5 */
- if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
+ if ((inp->inp_flags & IN6P_PKTINFO) != 0) {
struct in6_pktinfo pi6;
- bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
- if (IN6_IS_SCOPE_LINKLOCAL(&pi6.ipi6_addr))
- pi6.ipi6_addr.s6_addr16[1] = 0;
- pi6.ipi6_ifindex = (m && m->m_pkthdr.rcvif)
- ? m->m_pkthdr.rcvif->if_index
- : 0;
- *mp = sbcreatecontrol((caddr_t) &pi6,
- sizeof(struct in6_pktinfo), IPV6_PKTINFO,
- IPPROTO_IPV6);
- if (*mp)
- mp = &(*mp)->m_next;
+
+ bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof (struct in6_addr));
+ in6_clearscope(&pi6.ipi6_addr); /* XXX */
+ pi6.ipi6_ifindex =
+ (m && m->m_pkthdr.rcvif) ? m->m_pkthdr.rcvif->if_index : 0;
+
+ mp = sbcreatecontrol_mbuf((caddr_t)&pi6,
+ sizeof (struct in6_pktinfo),
+ IS2292(inp, IPV6_2292PKTINFO, IPV6_PKTINFO),
+ IPPROTO_IPV6, mp);
+ if (*mp == NULL)
+ return (NULL);
}
- if ((in6p->in6p_flags & IN6P_HOPLIMIT) != 0) {
+ if ((inp->inp_flags & IN6P_HOPLIMIT) != 0) {
int hlim = ip6->ip6_hlim & 0xff;
- *mp = sbcreatecontrol((caddr_t) &hlim,
- sizeof(int), IPV6_HOPLIMIT, IPPROTO_IPV6);
- if (*mp)
- mp = &(*mp)->m_next;
+
+ mp = sbcreatecontrol_mbuf((caddr_t)&hlim, sizeof (int),
+ IS2292(inp, IPV6_2292HOPLIMIT, IPV6_HOPLIMIT),
+ IPPROTO_IPV6, mp);
+ if (*mp == NULL)
+ return (NULL);
}
- if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
- u_int32_t flowinfo;
- int tclass;
+ if (v4only != NULL)
+ *v4only = 0;
+ return (mp);
+}
- flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
- flowinfo >>= 20;
+int
+ip6_savecontrol(struct inpcb *in6p, struct mbuf *m, struct mbuf **mp)
+{
+ struct mbuf **np;
+ struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
+ int v4only = 0;
+
+ *mp = NULL;
+ np = ip6_savecontrol_v4(in6p, m, mp, &v4only);
+ if (np == NULL)
+ goto no_mbufs;
+
+ mp = np;
+ if (v4only)
+ return (0);
- tclass = flowinfo & 0xff;
- *mp = sbcreatecontrol((caddr_t) &tclass, sizeof(tclass),
- IPV6_TCLASS, IPPROTO_IPV6);
- if (*mp)
- mp = &(*mp)->m_next;
- }
+ if ((in6p->inp_flags & IN6P_TCLASS) != 0) {
+ u_int32_t flowinfo;
+ int tclass;
+
+ flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
+ flowinfo >>= 20;
+
+ tclass = flowinfo & 0xff;
+ mp = sbcreatecontrol_mbuf((caddr_t)&tclass, sizeof (tclass),
+ IPV6_TCLASS, IPPROTO_IPV6, mp);
+ if (*mp == NULL)
+ goto no_mbufs;
+ }
/*
* IPV6_HOPOPTS socket option. Recall that we required super-user
* privilege for the option (see ip6_ctloutput), but it might be too
* strict, since there might be some hop-by-hop options which can be
* returned to normal user.
- * See RFC 2292 section 6.
+ * See also RFC 2292 section 6 (or RFC 3542 section 8).
*/
- if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
+ if ((in6p->inp_flags & IN6P_HOPOPTS) != 0) {
/*
* Check if a hop-by-hop options header is contatined in the
* received packet, and if so, store the options as ancillary
* data. Note that a hop-by-hop options header must be
- * just after the IPv6 header, which fact is assured through
- * the IPv6 input processing.
+ * just after the IPv6 header, which is assured through the
+ * IPv6 input processing.
*/
ip6 = mtod(m, struct ip6_hdr *);
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
struct ip6_hbh *hbh;
int hbhlen = 0;
-#if PULLDOWN_TEST
- struct mbuf *ext;
-#endif
-
-#ifndef PULLDOWN_TEST
hbh = (struct ip6_hbh *)(ip6 + 1);
hbhlen = (hbh->ip6h_len + 1) << 3;
-#else
- ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
- ip6->ip6_nxt);
- if (ext == NULL) {
- ip6stat.ip6s_tooshort++;
- return;
- }
- hbh = mtod(ext, struct ip6_hbh *);
- hbhlen = (hbh->ip6h_len + 1) << 3;
- if (hbhlen != ext->m_len) {
- m_freem(ext);
- ip6stat.ip6s_tooshort++;
- return;
- }
-#endif
/*
- * XXX: We copy whole the header even if a jumbo
- * payload option is included, which option is to
- * be removed before returning in the RFC 2292.
- * Note: this constraint is removed in 2292bis.
+ * XXX: We copy the whole header even if a
+ * jumbo payload option is included, the option which
+ * is to be removed before returning according to
+ * RFC2292.
+ * Note: this constraint is removed in RFC3542
*/
- *mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
- IPV6_HOPOPTS, IPPROTO_IPV6);
- if (*mp)
- mp = &(*mp)->m_next;
-#if PULLDOWN_TEST
- m_freem(ext);
-#endif
- }
- }
-
- /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
- if ((in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDRDSTOPTS)) != 0) {
- int proto, off, nxt;
-
- /*
- * go through the header chain to see if a routing header is
- * contained in the packet. We need this information to store
- * destination options headers (if any) properly.
- * XXX: performance issue. We should record this info when
- * processing extension headers in incoming routine.
- * (todo) use m_aux?
- */
- proto = IPPROTO_IPV6;
- off = 0;
- nxt = -1;
- while (1) {
- int newoff;
+ mp = sbcreatecontrol_mbuf((caddr_t)hbh, hbhlen,
+ IS2292(in6p, IPV6_2292HOPOPTS, IPV6_HOPOPTS),
+ IPPROTO_IPV6, mp);
- newoff = ip6_nexthdr(m, off, proto, &nxt);
- if (newoff < 0)
- break;
- if (newoff < off) /* invalid, check for safety */
- break;
- if ((proto = nxt) == IPPROTO_ROUTING) {
- rthdr_exist = 1;
- break;
+ if (*mp == NULL) {
+ goto no_mbufs;
}
- off = newoff;
}
}
- if ((in6p->in6p_flags &
- (IN6P_RTHDR | IN6P_DSTOPTS | IN6P_RTHDRDSTOPTS)) != 0) {
- ip6 = mtod(m, struct ip6_hdr *);
- int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr);
+ if ((in6p->inp_flags & (IN6P_RTHDR | IN6P_DSTOPTS)) != 0) {
+ int nxt = ip6->ip6_nxt, off = sizeof (struct ip6_hdr);
/*
* Search for destination options headers or routing
while (1) { /* is explicit loop prevention necessary? */
struct ip6_ext *ip6e = NULL;
int elen;
-#if PULLDOWN_TEST
- struct mbuf *ext = NULL;
-#endif
/*
* if it is not an extension header, don't try to
goto loopend;
}
-#ifndef PULLDOWN_TEST
- if (off + sizeof(*ip6e) > m->m_len)
+ if (off + sizeof (*ip6e) > m->m_len)
goto loopend;
ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + off);
if (nxt == IPPROTO_AH)
elen = (ip6e->ip6e_len + 1) << 3;
if (off + elen > m->m_len)
goto loopend;
-#else
- ext = ip6_pullexthdr(m, off, nxt);
- if (ext == NULL) {
- ip6stat.ip6s_tooshort++;
- return;
- }
- ip6e = mtod(ext, struct ip6_ext *);
- if (nxt == IPPROTO_AH)
- elen = (ip6e->ip6e_len + 2) << 2;
- else
- elen = (ip6e->ip6e_len + 1) << 3;
- if (elen != ext->m_len) {
- m_freem(ext);
- ip6stat.ip6s_tooshort++;
- return;
- }
-#endif
switch (nxt) {
case IPPROTO_DSTOPTS:
- if ((in6p->in6p_flags & IN6P_DSTOPTS) == 0)
+ if (!(in6p->inp_flags & IN6P_DSTOPTS))
break;
- *mp = sbcreatecontrol((caddr_t)ip6e, elen,
- IPV6_DSTOPTS,
- IPPROTO_IPV6);
- if (*mp)
- mp = &(*mp)->m_next;
+ mp = sbcreatecontrol_mbuf((caddr_t)ip6e, elen,
+ IS2292(in6p, IPV6_2292DSTOPTS,
+ IPV6_DSTOPTS), IPPROTO_IPV6, mp);
+ if (*mp == NULL) {
+ goto no_mbufs;
+ }
break;
case IPPROTO_ROUTING:
- if (!in6p->in6p_flags & IN6P_RTHDR)
+ if (!(in6p->inp_flags & IN6P_RTHDR))
break;
- *mp = sbcreatecontrol((caddr_t)ip6e, elen,
- IPV6_RTHDR,
- IPPROTO_IPV6);
- if (*mp)
- mp = &(*mp)->m_next;
+ mp = sbcreatecontrol_mbuf((caddr_t)ip6e, elen,
+ IS2292(in6p, IPV6_2292RTHDR, IPV6_RTHDR),
+ IPPROTO_IPV6, mp);
+ if (*mp == NULL) {
+ goto no_mbufs;
+ }
break;
case IPPROTO_HOPOPTS:
case IPPROTO_AH: /* is it possible? */
default:
/*
- * other cases have been filtered in the above.
+ * other cases have been filtered in the above.
* none will visit this case. here we supply
* the code just in case (nxt overwritten or
* other cases).
*/
-#if PULLDOWN_TEST
- m_freem(ext);
-#endif
goto loopend;
}
off += elen;
nxt = ip6e->ip6e_nxt;
ip6e = NULL;
-#if PULLDOWN_TEST
- m_freem(ext);
- ext = NULL;
-#endif
}
- loopend:
+loopend:
;
}
-
+ return (0);
+no_mbufs:
+ ip6stat.ip6s_pktdropcntrl++;
+ /* XXX increment a stat to show the failure */
+ return (ENOBUFS);
}
+#undef IS2292
-#if PULLDOWN_TEST
-/*
- * pull single extension header from mbuf chain. returns single mbuf that
- * contains the result, or NULL on error.
- */
-static struct mbuf *
-ip6_pullexthdr(m, off, nxt)
- struct mbuf *m;
- size_t off;
- int nxt;
+void
+ip6_notify_pmtu(struct inpcb *in6p, struct sockaddr_in6 *dst, u_int32_t *mtu)
{
- struct ip6_ext ip6e;
- size_t elen;
- struct mbuf *n;
+ struct socket *so;
+ struct mbuf *m_mtu;
+ struct ip6_mtuinfo mtuctl;
-#if DIAGNOSTIC
- switch (nxt) {
- case IPPROTO_DSTOPTS:
- case IPPROTO_ROUTING:
- case IPPROTO_HOPOPTS:
- case IPPROTO_AH: /* is it possible? */
- break;
- default:
- printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
+ so = in6p->inp_socket;
+
+ if (mtu == NULL)
+ return;
+
+#ifdef DIAGNOSTIC
+ if (so == NULL) { /* I believe this is impossible */
+ panic("ip6_notify_pmtu: socket is NULL");
+ /* NOTREACHED */
}
#endif
- m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
- if (nxt == IPPROTO_AH)
- elen = (ip6e.ip6e_len + 2) << 2;
- else
- elen = (ip6e.ip6e_len + 1) << 3;
-
- MGET(n, M_DONTWAIT, MT_DATA);
- if (n && elen >= MLEN) {
- MCLGET(n, M_DONTWAIT);
- if ((n->m_flags & M_EXT) == 0) {
- m_free(n);
- n = NULL;
- }
- }
- if (!n)
- return NULL;
+ bzero(&mtuctl, sizeof (mtuctl)); /* zero-clear for safety */
+ mtuctl.ip6m_mtu = *mtu;
+ mtuctl.ip6m_addr = *dst;
+ if (sa6_recoverscope(&mtuctl.ip6m_addr, TRUE))
+ return;
- n->m_len = 0;
- if (elen >= M_TRAILINGSPACE(n)) {
- m_free(n);
- return NULL;
- }
+ if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof (mtuctl),
+ IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
+ return;
- m_copydata(m, off, elen, mtod(n, caddr_t));
- n->m_len = elen;
- return n;
+ if (sbappendaddr(&so->so_rcv, SA(dst), NULL, m_mtu, NULL) == 0) {
+ m_freem(m_mtu);
+ /* XXX: should count statistics */
+ } else {
+ sorwakeup(so);
+ }
}
-#endif
/*
* Get pointer to the previous header followed by the header
* we develop `neater' mechanism to process extension headers.
*/
char *
-ip6_get_prevhdr(m, off)
- struct mbuf *m;
- int off;
+ip6_get_prevhdr(struct mbuf *m, int off)
{
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
- if (off == sizeof(struct ip6_hdr))
- return((char *) &ip6->ip6_nxt);
- else {
+ if (off == sizeof (struct ip6_hdr)) {
+ return ((char *)&ip6->ip6_nxt);
+ } else {
int len, nxt;
struct ip6_ext *ip6e = NULL;
nxt = ip6->ip6_nxt;
- len = sizeof(struct ip6_hdr);
+ len = sizeof (struct ip6_hdr);
while (len < off) {
ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
switch (nxt) {
case IPPROTO_FRAGMENT:
- len += sizeof(struct ip6_frag);
+ len += sizeof (struct ip6_frag);
break;
case IPPROTO_AH:
len += (ip6e->ip6e_len + 2) << 2;
nxt = ip6e->ip6e_nxt;
}
if (ip6e)
- return((char *) &ip6e->ip6e_nxt);
+ return ((char *)&ip6e->ip6e_nxt);
else
- return NULL;
+ return (NULL);
}
}
* get next header offset. m will be retained.
*/
int
-ip6_nexthdr(m, off, proto, nxtp)
- struct mbuf *m;
- int off;
- int proto;
- int *nxtp;
+ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
{
struct ip6_hdr ip6;
struct ip6_ext ip6e;
struct ip6_frag fh;
/* just in case */
- if (m == NULL)
- panic("ip6_nexthdr: m == NULL");
+ VERIFY(m != NULL);
if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
- return -1;
+ return (-1);
switch (proto) {
case IPPROTO_IPV6:
- if (m->m_pkthdr.len < off + sizeof(ip6))
- return -1;
- m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
+ if (m->m_pkthdr.len < off + sizeof (ip6))
+ return (-1);
+ m_copydata(m, off, sizeof (ip6), (caddr_t)&ip6);
if (nxtp)
*nxtp = ip6.ip6_nxt;
- off += sizeof(ip6);
- return off;
+ off += sizeof (ip6);
+ return (off);
case IPPROTO_FRAGMENT:
/*
* terminate parsing if it is not the first fragment,
* it does not make sense to parse through it.
*/
- if (m->m_pkthdr.len < off + sizeof(fh))
- return -1;
- m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
+ if (m->m_pkthdr.len < off + sizeof (fh))
+ return (-1);
+ m_copydata(m, off, sizeof (fh), (caddr_t)&fh);
/* IP6F_OFF_MASK = 0xfff8(BigEndian), 0xf8ff(LittleEndian) */
if (fh.ip6f_offlg & IP6F_OFF_MASK)
- return -1;
+ return (-1);
if (nxtp)
*nxtp = fh.ip6f_nxt;
- off += sizeof(struct ip6_frag);
- return off;
+ off += sizeof (struct ip6_frag);
+ return (off);
case IPPROTO_AH:
- if (m->m_pkthdr.len < off + sizeof(ip6e))
- return -1;
- m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
+ if (m->m_pkthdr.len < off + sizeof (ip6e))
+ return (-1);
+ m_copydata(m, off, sizeof (ip6e), (caddr_t)&ip6e);
if (nxtp)
*nxtp = ip6e.ip6e_nxt;
off += (ip6e.ip6e_len + 2) << 2;
- return off;
+ return (off);
case IPPROTO_HOPOPTS:
case IPPROTO_ROUTING:
case IPPROTO_DSTOPTS:
- if (m->m_pkthdr.len < off + sizeof(ip6e))
- return -1;
- m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
+ if (m->m_pkthdr.len < off + sizeof (ip6e))
+ return (-1);
+ m_copydata(m, off, sizeof (ip6e), (caddr_t)&ip6e);
if (nxtp)
*nxtp = ip6e.ip6e_nxt;
off += (ip6e.ip6e_len + 1) << 3;
- return off;
+ return (off);
case IPPROTO_NONE:
case IPPROTO_ESP:
case IPPROTO_IPCOMP:
/* give up */
- return -1;
+ return (-1);
default:
- return -1;
+ return (-1);
}
-
- return -1;
}
/*
* get offset for the last header in the chain. m will be kept untainted.
*/
int
-ip6_lasthdr(m, off, proto, nxtp)
- struct mbuf *m;
- int off;
- int proto;
- int *nxtp;
+ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
{
int newoff;
int nxt;
while (1) {
newoff = ip6_nexthdr(m, off, proto, nxtp);
if (newoff < 0)
- return off;
+ return (off);
else if (newoff < off)
- return -1; /* invalid */
+ return (-1); /* invalid */
else if (newoff == off)
- return newoff;
+ return (newoff);
off = newoff;
proto = *nxtp;
}
struct ip6aux *
-ip6_addaux(
- struct mbuf *m)
+ip6_addaux(struct mbuf *m)
{
struct m_tag *tag;
-
+
/* Check if one is already allocated */
- tag = m_tag_locate(m, KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_INET6, NULL);
+ tag = m_tag_locate(m, KERNEL_MODULE_TAG_ID,
+ KERNEL_TAG_TYPE_INET6, NULL);
if (tag == NULL) {
/* Allocate a tag */
- tag = m_tag_alloc(KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_INET6,
- sizeof (struct ip6aux), M_DONTWAIT);
+ tag = m_tag_create(KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_INET6,
+ sizeof (struct ip6aux), M_DONTWAIT, m);
/* Attach it to the mbuf */
if (tag) {
m_tag_prepend(m, tag);
}
}
-
- return tag ? (struct ip6aux*)(tag + 1) : NULL;
+
+ return (tag ? (struct ip6aux *)(tag + 1) : NULL);
}
struct ip6aux *
-ip6_findaux(
- struct mbuf *m)
+ip6_findaux(struct mbuf *m)
{
struct m_tag *tag;
-
- tag = m_tag_locate(m, KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_ENCAP, NULL);
-
- return tag ? (struct ip6aux*)(tag + 1) : NULL;
+
+ tag = m_tag_locate(m, KERNEL_MODULE_TAG_ID,
+ KERNEL_TAG_TYPE_INET6, NULL);
+
+ return (tag ? (struct ip6aux *)(tag + 1) : NULL);
}
void
-ip6_delaux(
- struct mbuf *m)
+ip6_delaux(struct mbuf *m)
{
struct m_tag *tag;
- tag = m_tag_locate(m, KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_ENCAP, NULL);
+ tag = m_tag_locate(m, KERNEL_MODULE_TAG_ID,
+ KERNEL_TAG_TYPE_INET6, NULL);
if (tag) {
m_tag_delete(m, tag);
}
}
+/*
+ * Drain callback
+ */
+void
+ip6_drain(void)
+{
+ frag6_drain(); /* fragments */
+ in6_rtqdrain(); /* protocol cloned routes */
+ nd6_drain(NULL); /* cloned routes: ND6 */
+}
+
/*
* System control for IP6
*/
0, 0, 0, 0,
ENOPROTOOPT
};
+
+static int
+sysctl_reset_ip6_input_stats SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int error, i;
+
+ i = ip6_input_measure;
+ error = sysctl_handle_int(oidp, &i, 0, req);
+ if (error || req->newptr == USER_ADDR_NULL)
+ goto done;
+ /* impose bounds */
+ if (i < 0 || i > 1) {
+ error = EINVAL;
+ goto done;
+ }
+ if (ip6_input_measure != i && i == 1) {
+ net_perf_initialize(&net_perf, ip6_input_measure_bins);
+ }
+ ip6_input_measure = i;
+done:
+ return (error);
+}
+
+static int
+sysctl_ip6_input_measure_bins SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int error;
+ uint64_t i;
+
+ i = ip6_input_measure_bins;
+ error = sysctl_handle_quad(oidp, &i, 0, req);
+ if (error || req->newptr == USER_ADDR_NULL)
+ goto done;
+ /* validate data */
+ if (!net_perf_validate_bins(i)) {
+ error = EINVAL;
+ goto done;
+ }
+ ip6_input_measure_bins = i;
+done:
+ return (error);
+}
+
+static int
+sysctl_ip6_input_getperf SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+ if (req->oldptr == USER_ADDR_NULL)
+ req->oldlen = (size_t)sizeof (struct ipstat);
+
+ return (SYSCTL_OUT(req, &net_perf, MIN(sizeof (net_perf), req->oldlen)));
+}
projects / apple / xnu.git / blobdiff