-/* $FreeBSD: src/sys/netinet6/ip6_output.c,v 1.43 2002/10/31 19:45:48 ume Exp $ */
-/* $KAME: ip6_output.c,v 1.279 2002/01/26 06:12:30 jinmei Exp $ */
+/*
+ * Copyright (c) 2000-2017 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
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * 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,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * 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@
+ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
*
* @(#)ip_output.c 8.3 (Berkeley) 1/21/94
*/
-
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/kauth.h>
+#include <sys/mcache.h>
+#include <sys/sysctl.h>
+#include <kern/zalloc.h>
+#include <libkern/OSByteOrder.h>
+
+#include <pexpert/pexpert.h>
+#include <mach/sdt.h>
#include <net/if.h>
#include <net/route.h>
+#include <net/dlil.h>
+#include <net/net_api_stats.h>
+#include <net/net_osdep.h>
+#include <net/net_perf.h>
+#include <netinet/ip.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
+#include <netinet/kpi_ipfilter_var.h>
+#include <netinet/in_tclass.h>
+
+#include <netinet6/ip6protosw.h>
#include <netinet/icmp6.h>
#include <netinet6/ip6_var.h>
#include <netinet/in_pcb.h>
#include <netinet6/nd6.h>
-
+#include <netinet6/scope6_var.h>
#if IPSEC
#include <netinet6/ipsec.h>
-#if INET6
#include <netinet6/ipsec6.h>
-#endif
#include <netkey/key.h>
extern int ipsec_bypass;
-extern lck_mtx_t *sadb_mutex;
-extern lck_mtx_t *nd6_mutex;
#endif /* IPSEC */
-#include <netinet6/ip6_fw.h>
-
-#include <net/net_osdep.h>
-
-#include <netinet/kpi_ipfilter_var.h>
-
-#ifndef __APPLE__
-static MALLOC_DEFINE(M_IPMOPTS, "ip6_moptions", "internet multicast options");
-#endif
+#if NECP
+#include <net/necp.h>
+#endif /* NECP */
+#if CONFIG_MACF_NET
+#include <security/mac.h>
+#endif /* CONFIG_MACF_NET */
-extern u_long route_generation;
+#if DUMMYNET
+#include <netinet/ip_fw.h>
+#include <netinet/ip_dummynet.h>
+#endif /* DUMMYNET */
-struct ip6_exthdrs {
- struct mbuf *ip6e_ip6;
- struct mbuf *ip6e_hbh;
- struct mbuf *ip6e_dest1;
- struct mbuf *ip6e_rthdr;
- struct mbuf *ip6e_dest2;
-};
+#if PF
+#include <net/pfvar.h>
+#endif /* PF */
-static int ip6_pcbopts(struct ip6_pktopts **, struct mbuf *,
- struct socket *, struct sockopt *sopt);
-static int ip6_setmoptions(int, struct inpcb *, struct mbuf *);
-static int ip6_getmoptions(int, struct ip6_moptions *, struct mbuf **);
+static int sysctl_reset_ip6_output_stats SYSCTL_HANDLER_ARGS;
+static int sysctl_ip6_output_measure_bins SYSCTL_HANDLER_ARGS;
+static int sysctl_ip6_output_getperf SYSCTL_HANDLER_ARGS;
static int ip6_copyexthdr(struct mbuf **, caddr_t, int);
-static int ip6_insertfraghdr(struct mbuf *, struct mbuf *, int,
- struct ip6_frag **);
+static void ip6_out_cksum_stats(int, u_int32_t);
static int ip6_insert_jumboopt(struct ip6_exthdrs *, u_int32_t);
+static int ip6_insertfraghdr(struct mbuf *, struct mbuf *, int,
+ struct ip6_frag **);
+static int ip6_getpmtu(struct route_in6 *, struct route_in6 *,
+ struct ifnet *, struct in6_addr *, u_int32_t *, boolean_t *);
+static int ip6_pcbopts(struct ip6_pktopts **, struct mbuf *, struct socket *,
+ struct sockopt *sopt);
+static int ip6_pcbopt(int, u_char *, int, struct ip6_pktopts **, int);
+static int ip6_getpcbopt(struct ip6_pktopts *, int, struct sockopt *);
+static int copypktopts(struct ip6_pktopts *, struct ip6_pktopts *, int);
+static void im6o_trace(struct ip6_moptions *, int);
+static int ip6_setpktopt(int, u_char *, int, struct ip6_pktopts *, int,
+ int, int);
static int ip6_splithdr(struct mbuf *, struct ip6_exthdrs *);
+static void ip6_output_checksum(struct ifnet *, uint32_t, struct mbuf *,
+ int, uint32_t, uint32_t);
+extern int udp_ctloutput(struct socket *, struct sockopt *);
+static int ip6_fragment_packet(struct mbuf **m,
+ struct ip6_pktopts *opt, struct ip6_exthdrs *exthdrsp, struct ifnet *ifp,
+ uint32_t mtu, boolean_t alwaysfrag, uint32_t unfragpartlen,
+ struct route_in6 *ro_pmtu, int nxt0, uint32_t optlen);
+
+SYSCTL_DECL(_net_inet6_ip6);
+
+static int ip6_output_measure = 0;
+SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, output_perf,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &ip6_output_measure, 0, sysctl_reset_ip6_output_stats, "I", "Do time measurement");
+
+static uint64_t ip6_output_measure_bins = 0;
+SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, output_perf_bins,
+ CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_output_measure_bins, 0,
+ sysctl_ip6_output_measure_bins, "I",
+ "bins for chaining performance data histogram");
+
+static net_perf_t net_perf;
+SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, output_perf_data,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
+ 0, 0, sysctl_ip6_output_getperf, "S,net_perf",
+ "IP6 output performance data (struct net_perf, net/net_perf.h)");
+
+#define IM6O_TRACE_HIST_SIZE 32 /* size of trace history */
+
+/* For gdb */
+__private_extern__ unsigned int im6o_trace_hist_size = IM6O_TRACE_HIST_SIZE;
+
+struct ip6_moptions_dbg {
+ struct ip6_moptions im6o; /* ip6_moptions */
+ u_int16_t im6o_refhold_cnt; /* # of IM6O_ADDREF */
+ u_int16_t im6o_refrele_cnt; /* # of IM6O_REMREF */
+ /*
+ * Alloc and free callers.
+ */
+ ctrace_t im6o_alloc;
+ ctrace_t im6o_free;
+ /*
+ * Circular lists of IM6O_ADDREF and IM6O_REMREF callers.
+ */
+ ctrace_t im6o_refhold[IM6O_TRACE_HIST_SIZE];
+ ctrace_t im6o_refrele[IM6O_TRACE_HIST_SIZE];
+};
+
+#if DEBUG
+static unsigned int im6o_debug = 1; /* debugging (enabled) */
+#else
+static unsigned int im6o_debug; /* debugging (disabled) */
+#endif /* !DEBUG */
-extern int ip_createmoptions(struct ip_moptions **imop);
-extern int ip_addmembership(struct ip_moptions *imo, struct ip_mreq *mreq);
-extern int ip_dropmembership(struct ip_moptions *imo, struct ip_mreq *mreq);
-extern lck_mtx_t *ip6_mutex;
+static unsigned int im6o_size; /* size of zone element */
+static struct zone *im6o_zone; /* zone for ip6_moptions */
+
+#define IM6O_ZONE_MAX 64 /* maximum elements in zone */
+#define IM6O_ZONE_NAME "ip6_moptions" /* zone name */
+
+/*
+ * ip6_output() calls ip6_output_list() to do the work
+ */
+int
+ip6_output(struct mbuf *m0, struct ip6_pktopts *opt,
+ struct route_in6 *ro, int flags, struct ip6_moptions *im6o,
+ struct ifnet **ifpp, struct ip6_out_args *ip6oa)
+{
+ return ip6_output_list(m0, 0, opt, ro, flags, im6o, ifpp, ip6oa);
+}
/*
- * IP6 output. The packet in mbuf chain m contains a skeletal IP6
+ * IP6 output. Each packet in mbuf chain m contains a skeletal IP6
* header (with pri, len, nxt, hlim, src, dst).
* This function may modify ver and hlim only.
* The mbuf chain containing the packet will be freed.
* The mbuf opt, if present, will not be freed.
*
- * type of "mtu": rt_rmx.rmx_mtu is u_long, ifnet.ifr_mtu is int, and
- * nd_ifinfo.linkmtu is u_int32_t. so we use u_long to hold largest one,
+ * If ro is non-NULL and has valid ro->ro_rt, route lookup would be
+ * skipped and ro->ro_rt would be used. Otherwise the result of route
+ * lookup is stored in ro->ro_rt.
+ *
+ * type of "mtu": rt_rmx.rmx_mtu is u_int32_t, ifnet.ifr_mtu is int, and
+ * nd_ifinfo.linkmtu is u_int32_t. so we use u_int32_t to hold largest one,
* which is rt_rmx.rmx_mtu.
*/
int
-ip6_output(
- struct mbuf *m0,
- struct ip6_pktopts *opt,
- struct route_in6 *ro,
- int flags,
- struct ip6_moptions *im6o,
- struct ifnet **ifpp, /* XXX: just for statistics */
- int locked)
+ip6_output_list(struct mbuf *m0, int packetchain, struct ip6_pktopts *opt,
+ struct route_in6 *ro, int flags, struct ip6_moptions *im6o,
+ struct ifnet **ifpp, struct ip6_out_args *ip6oa)
{
- struct ip6_hdr *ip6, *mhip6;
- struct ifnet *ifp, *origifp;
- struct mbuf *m = m0;
- int hlen, tlen, len, off;
- struct route_in6 ip6route;
- struct sockaddr_in6 *dst;
+ struct ip6_hdr *ip6;
+ u_char *nexthdrp;
+ struct ifnet *ifp = NULL, *origifp = NULL; /* refcnt'd */
+ struct ifnet **ifpp_save = ifpp;
+ struct mbuf *m, *mprev;
+ struct mbuf *sendchain = NULL, *sendchain_last = NULL;
+ struct mbuf *inputchain = NULL;
+ int nxt0 = 0;
+ struct route_in6 *ro_pmtu = NULL;
+ struct rtentry *rt = NULL;
+ struct sockaddr_in6 *dst = NULL, src_sa, dst_sa;
int error = 0;
- struct in6_ifaddr *ia = NULL;
- u_long mtu;
+ struct in6_ifaddr *ia = NULL, *src_ia = NULL;
+ u_int32_t mtu = 0;
+ boolean_t alwaysfrag = FALSE;
u_int32_t optlen = 0, plen = 0, unfragpartlen = 0;
- struct ip6_exthdrs exthdrs;
+ struct ip6_rthdr *rh;
struct in6_addr finaldst;
- struct route_in6 *ro_pmtu = NULL;
- int hdrsplit = 0;
- int needipsec = 0;
ipfilter_t inject_filter_ref;
-
+ struct ipf_pktopts *ippo = NULL;
+ struct flowadv *adv = NULL;
+ uint32_t pktcnt = 0;
+ uint32_t packets_processed = 0;
+ struct timeval start_tv;
+#if DUMMYNET
+ struct m_tag *tag;
+ struct ip6_out_args saved_ip6oa;
+ struct sockaddr_in6 dst_buf;
+#endif /* DUMMYNET */
#if IPSEC
- int needipsectun = 0;
struct socket *so = NULL;
struct secpolicy *sp = NULL;
+ struct route_in6 *ipsec_saved_route = NULL;
+ boolean_t needipsectun = FALSE;
+#endif /* IPSEC */
+#if NECP
+ necp_kernel_policy_result necp_result = 0;
+ necp_kernel_policy_result_parameter necp_result_parameter;
+ necp_kernel_policy_id necp_matched_policy_id = 0;
+#endif /* NECP */
+ struct {
+ struct ipf_pktopts ipf_pktopts;
+ struct ip6_exthdrs exthdrs;
+ struct route_in6 ip6route;
+#if IPSEC
+ struct ipsec_output_state ipsec_state;
+#endif /* IPSEC */
+#if NECP
+ struct route_in6 necp_route;
+#endif /* NECP */
+#if DUMMYNET
+ struct route_in6 saved_route;
+ struct route_in6 saved_ro_pmtu;
+ struct ip_fw_args args;
+#endif /* DUMMYNET */
+ } ip6obz;
+#define ipf_pktopts ip6obz.ipf_pktopts
+#define exthdrs ip6obz.exthdrs
+#define ip6route ip6obz.ip6route
+#define ipsec_state ip6obz.ipsec_state
+#define necp_route ip6obz.necp_route
+#define saved_route ip6obz.saved_route
+#define saved_ro_pmtu ip6obz.saved_ro_pmtu
+#define args ip6obz.args
+ union {
+ struct {
+ boolean_t select_srcif : 1;
+ boolean_t hdrsplit : 1;
+ boolean_t route_selected : 1;
+ boolean_t dontfrag : 1;
+#if IPSEC
+ boolean_t needipsec : 1;
+ boolean_t noipsec : 1;
+#endif /* IPSEC */
+ };
+ uint32_t raw;
+ } ip6obf = { .raw = 0 };
- if (!locked)
- lck_mtx_lock(ip6_mutex);
- /* for AH processing. stupid to have "socket" variable in IP layer... */
- if (ipsec_bypass == 0)
- {
+ if (ip6_output_measure)
+ net_perf_start_time(&net_perf, &start_tv);
+
+ VERIFY(m0->m_flags & M_PKTHDR);
+
+ /* zero out {saved_route, saved_ro_pmtu, ip6route, exthdrs, args} */
+ bzero(&ip6obz, sizeof (ip6obz));
+
+#if DUMMYNET
+ if (SLIST_EMPTY(&m0->m_pkthdr.tags))
+ goto tags_done;
+
+ /* Grab info from mtags prepended to the chain */
+ if ((tag = m_tag_locate(m0, KERNEL_MODULE_TAG_ID,
+ KERNEL_TAG_TYPE_DUMMYNET, NULL)) != NULL) {
+ struct dn_pkt_tag *dn_tag;
+
+ /*
+ * ip6_output_list() cannot handle chains of packets reinjected
+ * by dummynet. The same restriction applies to
+ * ip_output_list().
+ */
+ VERIFY(0 == packetchain);
+
+ dn_tag = (struct dn_pkt_tag *)(tag+1);
+ args.fwa_pf_rule = dn_tag->dn_pf_rule;
+
+ bcopy(&dn_tag->dn_dst6, &dst_buf, sizeof (dst_buf));
+ dst = &dst_buf;
+ ifp = dn_tag->dn_ifp;
+ if (ifp != NULL)
+ ifnet_reference(ifp);
+ flags = dn_tag->dn_flags;
+ if (dn_tag->dn_flags & IPV6_OUTARGS) {
+ saved_ip6oa = dn_tag->dn_ip6oa;
+ ip6oa = &saved_ip6oa;
+ }
+
+ saved_route = dn_tag->dn_ro6;
+ ro = &saved_route;
+ saved_ro_pmtu = dn_tag->dn_ro6_pmtu;
+ ro_pmtu = &saved_ro_pmtu;
+ origifp = dn_tag->dn_origifp;
+ if (origifp != NULL)
+ ifnet_reference(origifp);
+ mtu = dn_tag->dn_mtu;
+ alwaysfrag = (dn_tag->dn_alwaysfrag != 0);
+ unfragpartlen = dn_tag->dn_unfragpartlen;
+
+ bcopy(&dn_tag->dn_exthdrs, &exthdrs, sizeof (exthdrs));
+
+ m_tag_delete(m0, tag);
+ }
+
+tags_done:
+#endif /* DUMMYNET */
+
+ m = m0;
+
+#if IPSEC
+ if (ipsec_bypass == 0) {
so = ipsec_getsocket(m);
- (void)ipsec_setsocket(m, NULL);
+ if (so != NULL) {
+ (void) ipsec_setsocket(m, NULL);
+ }
+ /* If packet is bound to an interface, check bound policies */
+ if ((flags & IPV6_OUTARGS) &&
+ (ip6oa->ip6oa_flags & IP6OAF_BOUND_IF) &&
+ ip6oa->ip6oa_boundif != IFSCOPE_NONE) {
+ /* ip6obf.noipsec is a bitfield, use temp integer */
+ int noipsec = 0;
+
+ if (ipsec6_getpolicybyinterface(m, IPSEC_DIR_OUTBOUND,
+ flags, ip6oa, &noipsec, &sp) != 0)
+ goto bad;
+
+ ip6obf.noipsec = (noipsec != 0);
+ }
}
#endif /* IPSEC */
+ ippo = &ipf_pktopts;
+
+ if (flags & IPV6_OUTARGS) {
+ /*
+ * In the forwarding case, only the ifscope value is used,
+ * as source interface selection doesn't take place.
+ */
+ if ((ip6obf.select_srcif = (!(flags & (IPV6_FORWARDING |
+ IPV6_UNSPECSRC | IPV6_FLAG_NOSRCIFSEL)) &&
+ (ip6oa->ip6oa_flags & IP6OAF_SELECT_SRCIF))))
+ ipf_pktopts.ippo_flags |= IPPOF_SELECT_SRCIF;
+
+ if ((ip6oa->ip6oa_flags & IP6OAF_BOUND_IF) &&
+ ip6oa->ip6oa_boundif != IFSCOPE_NONE) {
+ ipf_pktopts.ippo_flags |= (IPPOF_BOUND_IF |
+ (ip6oa->ip6oa_boundif << IPPOF_SHIFT_IFSCOPE));
+ }
+
+ if (ip6oa->ip6oa_flags & IP6OAF_BOUND_SRCADDR)
+ ipf_pktopts.ippo_flags |= IPPOF_BOUND_SRCADDR;
+ } else {
+ ip6obf.select_srcif = FALSE;
+ if (flags & IPV6_OUTARGS) {
+ ip6oa->ip6oa_boundif = IFSCOPE_NONE;
+ ip6oa->ip6oa_flags &= ~(IP6OAF_SELECT_SRCIF |
+ IP6OAF_BOUND_IF | IP6OAF_BOUND_SRCADDR);
+ }
+ }
+
+ if (flags & IPV6_OUTARGS) {
+ if (ip6oa->ip6oa_flags & IP6OAF_NO_CELLULAR)
+ ipf_pktopts.ippo_flags |= IPPOF_NO_IFT_CELLULAR;
+ if (ip6oa->ip6oa_flags & IP6OAF_NO_EXPENSIVE)
+ ipf_pktopts.ippo_flags |= IPPOF_NO_IFF_EXPENSIVE;
+ adv = &ip6oa->ip6oa_flowadv;
+ adv->code = FADV_SUCCESS;
+ ip6oa->ip6oa_retflags = 0;
+ }
+
+ /*
+ * Clear out ifpp to be filled in after determining route. ifpp_save is
+ * used to keep old value to release reference properly and dtrace
+ * ipsec tunnel traffic properly.
+ */
+ if (ifpp != NULL && *ifpp != NULL)
+ *ifpp = NULL;
+
+#if DUMMYNET
+ if (args.fwa_pf_rule) {
+ ip6 = mtod(m, struct ip6_hdr *);
+ VERIFY(ro != NULL); /* ro == saved_route */
+ goto check_with_pf;
+ }
+#endif /* DUMMYNET */
+
+#if NECP
+ /*
+ * Since all packets are assumed to come from same socket, necp lookup
+ * only needs to happen once per function entry.
+ */
+ necp_matched_policy_id = necp_ip6_output_find_policy_match(m, flags,
+ (flags & IPV6_OUTARGS) ? ip6oa : NULL, &necp_result,
+ &necp_result_parameter);
+#endif /* NECP */
+
+ /*
+ * If a chain was passed in, prepare for ther first iteration. For all
+ * other iterations, this work will be done at evaluateloop: label.
+ */
+ if (packetchain) {
+ /*
+ * Remove m from the chain during processing to avoid
+ * accidental frees on entire list.
+ */
+ inputchain = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+ }
+
+loopit:
+ packets_processed++;
+ m->m_pkthdr.pkt_flags &= ~(PKTF_LOOP|PKTF_IFAINFO);
ip6 = mtod(m, struct ip6_hdr *);
- inject_filter_ref = ipf_get_inject_filter(m);
+ nxt0 = ip6->ip6_nxt;
+ finaldst = ip6->ip6_dst;
+ ip6obf.hdrsplit = FALSE;
+ ro_pmtu = NULL;
+
+ if (!SLIST_EMPTY(&m->m_pkthdr.tags))
+ inject_filter_ref = ipf_get_inject_filter(m);
+ else
+ inject_filter_ref = NULL;
-#define MAKE_EXTHDR(hp, mp) \
- do { \
- if (hp) { \
+#define MAKE_EXTHDR(hp, mp) do { \
+ if (hp != NULL) { \
struct ip6_ext *eh = (struct ip6_ext *)(hp); \
- error = ip6_copyexthdr((mp), (caddr_t)(hp), \
- ((eh)->ip6e_len + 1) << 3); \
+ error = ip6_copyexthdr((mp), (caddr_t)(hp), \
+ ((eh)->ip6e_len + 1) << 3); \
if (error) \
goto freehdrs; \
} \
- } while (0)
-
- bzero(&exthdrs, sizeof(exthdrs));
-
- if (opt) {
+} while (0)
+
+ if (opt != NULL) {
/* Hop-by-Hop options header */
MAKE_EXTHDR(opt->ip6po_hbh, &exthdrs.ip6e_hbh);
/* Destination options header(1st part) */
- MAKE_EXTHDR(opt->ip6po_dest1, &exthdrs.ip6e_dest1);
+ if (opt->ip6po_rthdr) {
+ /*
+ * Destination options header(1st part)
+ * This only makes sense with a routing header.
+ * See Section 9.2 of RFC 3542.
+ * Disabling this part just for MIP6 convenience is
+ * a bad idea. We need to think carefully about a
+ * way to make the advanced API coexist with MIP6
+ * options, which might automatically be inserted in
+ * the kernel.
+ */
+ MAKE_EXTHDR(opt->ip6po_dest1, &exthdrs.ip6e_dest1);
+ }
/* Routing header */
MAKE_EXTHDR(opt->ip6po_rthdr, &exthdrs.ip6e_rthdr);
/* Destination options header(2nd part) */
MAKE_EXTHDR(opt->ip6po_dest2, &exthdrs.ip6e_dest2);
}
+#undef MAKE_EXTHDR
+
+#if NECP
+ if (necp_matched_policy_id) {
+ necp_mark_packet_from_ip(m, necp_matched_policy_id);
+
+ switch (necp_result) {
+ case NECP_KERNEL_POLICY_RESULT_PASS:
+ goto skip_ipsec;
+ case NECP_KERNEL_POLICY_RESULT_DROP:
+ case NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT:
+ /*
+ * Flow divert packets should be blocked at the IP
+ * layer.
+ */
+ error = EHOSTUNREACH;
+ ip6stat.ip6s_necp_policy_drop++;
+ goto freehdrs;
+ case NECP_KERNEL_POLICY_RESULT_IP_TUNNEL: {
+ /*
+ * Verify that the packet is being routed to the tunnel
+ */
+ struct ifnet *policy_ifp =
+ necp_get_ifnet_from_result_parameter(
+ &necp_result_parameter);
+
+ if (policy_ifp == ifp) {
+ goto skip_ipsec;
+ } else {
+ if (necp_packet_can_rebind_to_ifnet(m,
+ policy_ifp, (struct route *)&necp_route,
+ AF_INET6)) {
+ /*
+ * Set scoped index to the tunnel
+ * interface, since it is compatible
+ * with the packet. This will only work
+ * for callers who pass IPV6_OUTARGS,
+ * but that covers all of the clients
+ * we care about today.
+ */
+ if (flags & IPV6_OUTARGS) {
+ ip6oa->ip6oa_boundif =
+ policy_ifp->if_index;
+ ip6oa->ip6oa_flags |=
+ IP6OAF_BOUND_IF;
+ }
+ if (opt != NULL
+ && opt->ip6po_pktinfo != NULL) {
+ opt->ip6po_pktinfo->
+ ipi6_ifindex =
+ policy_ifp->if_index;
+ }
+ ro = &necp_route;
+ goto skip_ipsec;
+ } else {
+ error = ENETUNREACH;
+ ip6stat.ip6s_necp_policy_drop++;
+ goto freehdrs;
+ }
+ }
+ }
+ default:
+ break;
+ }
+ }
+#endif /* NECP */
+
#if IPSEC
- if (ipsec_bypass != 0)
+ if (ipsec_bypass != 0 || ip6obf.noipsec)
goto skip_ipsec;
-
- lck_mtx_lock(sadb_mutex);
- /* get a security policy for this packet */
- if (so == NULL)
- sp = ipsec6_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND, 0, &error);
- else
- sp = ipsec6_getpolicybysock(m, IPSEC_DIR_OUTBOUND, so, &error);
if (sp == NULL) {
- ipsec6stat.out_inval++;
- lck_mtx_unlock(sadb_mutex);
- goto freehdrs;
+ /* get a security policy for this packet */
+ if (so != NULL) {
+ sp = ipsec6_getpolicybysock(m, IPSEC_DIR_OUTBOUND,
+ so, &error);
+ } else {
+ sp = ipsec6_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND,
+ 0, &error);
+ }
+ if (sp == NULL) {
+ IPSEC_STAT_INCREMENT(ipsec6stat.out_inval);
+ goto freehdrs;
+ }
}
error = 0;
/* check policy */
switch (sp->policy) {
case IPSEC_POLICY_DISCARD:
+ case IPSEC_POLICY_GENERATE:
/*
* This packet is just discarded.
*/
- ipsec6stat.out_polvio++;
- lck_mtx_unlock(sadb_mutex);
+ IPSEC_STAT_INCREMENT(ipsec6stat.out_polvio);
goto freehdrs;
case IPSEC_POLICY_BYPASS:
case IPSEC_POLICY_NONE:
/* no need to do IPsec. */
- needipsec = 0;
+ ip6obf.needipsec = FALSE;
break;
-
+
case IPSEC_POLICY_IPSEC:
if (sp->req == NULL) {
/* acquire a policy */
error = key_spdacquire(sp);
- lck_mtx_unlock(sadb_mutex);
goto freehdrs;
}
- needipsec = 1;
+ if (sp->ipsec_if) {
+ goto skip_ipsec;
+ } else {
+ ip6obf.needipsec = TRUE;
+ }
break;
case IPSEC_POLICY_ENTRUST:
default:
- printf("ip6_output: Invalid policy found. %d\n", sp->policy);
+ printf("%s: Invalid policy found: %d\n", __func__, sp->policy);
+ break;
}
- lck_mtx_unlock(sadb_mutex);
- skip_ipsec:
+skip_ipsec:
#endif /* IPSEC */
/*
* Keep the length of the unfragmentable part for fragmentation.
*/
optlen = 0;
- if (exthdrs.ip6e_hbh) optlen += exthdrs.ip6e_hbh->m_len;
- if (exthdrs.ip6e_dest1) optlen += exthdrs.ip6e_dest1->m_len;
- if (exthdrs.ip6e_rthdr) optlen += exthdrs.ip6e_rthdr->m_len;
- unfragpartlen = optlen + sizeof(struct ip6_hdr);
+ if (exthdrs.ip6e_hbh != NULL)
+ optlen += exthdrs.ip6e_hbh->m_len;
+ if (exthdrs.ip6e_dest1 != NULL)
+ optlen += exthdrs.ip6e_dest1->m_len;
+ if (exthdrs.ip6e_rthdr != NULL)
+ optlen += exthdrs.ip6e_rthdr->m_len;
+ unfragpartlen = optlen + sizeof (struct ip6_hdr);
+
/* NOTE: we don't add AH/ESP length here. do that later. */
- if (exthdrs.ip6e_dest2) optlen += exthdrs.ip6e_dest2->m_len;
+ if (exthdrs.ip6e_dest2 != NULL)
+ optlen += exthdrs.ip6e_dest2->m_len;
/*
* If we need IPsec, or there is at least one extension header,
* separate IP6 header from the payload.
*/
- if ((needipsec || optlen) && !hdrsplit) {
+ if ((
+#if IPSEC
+ ip6obf.needipsec ||
+#endif /* IPSEC */
+ optlen) && !ip6obf.hdrsplit) {
if ((error = ip6_splithdr(m, &exthdrs)) != 0) {
m = NULL;
goto freehdrs;
}
m = exthdrs.ip6e_ip6;
- hdrsplit++;
+ ip6obf.hdrsplit = TRUE;
}
/* adjust pointer */
/* adjust mbuf packet header length */
m->m_pkthdr.len += optlen;
- plen = m->m_pkthdr.len - sizeof(*ip6);
+ plen = m->m_pkthdr.len - sizeof (*ip6);
/* If this is a jumbo payload, insert a jumbo payload option. */
if (plen > IPV6_MAXPACKET) {
- if (!hdrsplit) {
+ if (!ip6obf.hdrsplit) {
if ((error = ip6_splithdr(m, &exthdrs)) != 0) {
m = NULL;
goto freehdrs;
}
m = exthdrs.ip6e_ip6;
- hdrsplit++;
+ ip6obf.hdrsplit = TRUE;
}
/* adjust pointer */
ip6 = mtod(m, struct ip6_hdr *);
if ((error = ip6_insert_jumboopt(&exthdrs, plen)) != 0)
goto freehdrs;
ip6->ip6_plen = 0;
- } else
+ } else {
ip6->ip6_plen = htons(plen);
-
+ }
/*
* Concatenate headers and fill in next header fields.
* Here we have, on "m"
* during the header composing process, "m" points to IPv6 header.
* "mprev" points to an extension header prior to esp.
*/
- {
- u_char *nexthdrp = &ip6->ip6_nxt;
- struct mbuf *mprev = m;
+ nexthdrp = &ip6->ip6_nxt;
+ mprev = m;
- /*
- * we treat dest2 specially. this makes IPsec processing
- * much easier. the goal here is to make mprev point the
- * mbuf prior to dest2.
- *
- * result: IPv6 dest2 payload
- * m and mprev will point to IPv6 header.
- */
- if (exthdrs.ip6e_dest2) {
- if (!hdrsplit)
- panic("assumption failed: hdr not split");
- exthdrs.ip6e_dest2->m_next = m->m_next;
- m->m_next = exthdrs.ip6e_dest2;
- *mtod(exthdrs.ip6e_dest2, u_char *) = ip6->ip6_nxt;
- ip6->ip6_nxt = IPPROTO_DSTOPTS;
- }
-
-#define MAKE_CHAIN(m, mp, p, i)\
- do {\
- if (m) {\
- if (!hdrsplit) \
- panic("assumption failed: hdr not split"); \
- *mtod((m), u_char *) = *(p);\
- *(p) = (i);\
- p = mtod((m), u_char *);\
- (m)->m_next = (mp)->m_next;\
- (mp)->m_next = (m);\
- (mp) = (m);\
- }\
- } while (0)
- /*
- * result: IPv6 hbh dest1 rthdr dest2 payload
- * m will point to IPv6 header. mprev will point to the
- * extension header prior to dest2 (rthdr in the above case).
- */
- MAKE_CHAIN(exthdrs.ip6e_hbh, mprev,
- nexthdrp, IPPROTO_HOPOPTS);
- MAKE_CHAIN(exthdrs.ip6e_dest1, mprev,
- nexthdrp, IPPROTO_DSTOPTS);
- MAKE_CHAIN(exthdrs.ip6e_rthdr, mprev,
- nexthdrp, IPPROTO_ROUTING);
-
- if (!TAILQ_EMPTY(&ipv6_filters)) {
- struct ipfilter *filter;
- int seen = (inject_filter_ref == 0);
- int fixscope = 0;
- struct ipf_pktopts *ippo = 0, ipf_pktopts;
-
- if (im6o != NULL && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
- ippo = &ipf_pktopts;
- ippo->ippo_flags = IPPOF_MCAST_OPTS;
- ippo->ippo_mcast_ifnet = im6o->im6o_multicast_ifp;
- ippo->ippo_mcast_ttl = im6o->im6o_multicast_hlim;
- ippo->ippo_mcast_loop = im6o->im6o_multicast_loop;
- }
+ /*
+ * we treat dest2 specially. this makes IPsec processing
+ * much easier. the goal here is to make mprev point the
+ * mbuf prior to dest2.
+ *
+ * result: IPv6 dest2 payload
+ * m and mprev will point to IPv6 header.
+ */
+ if (exthdrs.ip6e_dest2 != NULL) {
+ if (!ip6obf.hdrsplit) {
+ panic("assumption failed: hdr not split");
+ /* NOTREACHED */
+ }
+ exthdrs.ip6e_dest2->m_next = m->m_next;
+ m->m_next = exthdrs.ip6e_dest2;
+ *mtod(exthdrs.ip6e_dest2, u_char *) = ip6->ip6_nxt;
+ ip6->ip6_nxt = IPPROTO_DSTOPTS;
+ }
- /* Hack: embed the scope_id in the destination */
- if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst) &&
- (ip6->ip6_dst.s6_addr16[1] == 0) && (ro != NULL)) {
- fixscope = 1;
- ip6->ip6_dst.s6_addr16[1] = htons(ro->ro_dst.sin6_scope_id);
- }
- {
- lck_mtx_unlock(ip6_mutex);
- ipf_ref();
- TAILQ_FOREACH(filter, &ipv6_filters, ipf_link) {
- /*
- * No need to proccess packet twice if we've
- * already seen it
- */
- if (seen == 0) {
- if ((struct ipfilter *)inject_filter_ref == filter)
- seen = 1;
- } else if (filter->ipf_filter.ipf_output) {
- errno_t result;
-
- result = filter->ipf_filter.ipf_output(filter->ipf_filter.cookie, (mbuf_t*)&m, ippo);
- if (result == EJUSTRETURN) {
- ipf_unref();
- locked = 1; /* Don't want to take lock to unlock it right away */
- goto done;
- }
- if (result != 0) {
- ipf_unref();
- locked = 1; /* Don't want to take lock to unlock it right away */
- goto bad;
- }
- }
+#define MAKE_CHAIN(m, mp, p, i) do { \
+ if (m != NULL) { \
+ if (!ip6obf.hdrsplit) { \
+ panic("assumption failed: hdr not split"); \
+ /* NOTREACHED */ \
+ } \
+ *mtod((m), u_char *) = *(p); \
+ *(p) = (i); \
+ p = mtod((m), u_char *); \
+ (m)->m_next = (mp)->m_next; \
+ (mp)->m_next = (m); \
+ (mp) = (m); \
+ } \
+} while (0)
+ /*
+ * result: IPv6 hbh dest1 rthdr dest2 payload
+ * m will point to IPv6 header. mprev will point to the
+ * extension header prior to dest2 (rthdr in the above case).
+ */
+ MAKE_CHAIN(exthdrs.ip6e_hbh, mprev, nexthdrp, IPPROTO_HOPOPTS);
+ MAKE_CHAIN(exthdrs.ip6e_dest1, mprev, nexthdrp, IPPROTO_DSTOPTS);
+ MAKE_CHAIN(exthdrs.ip6e_rthdr, mprev, nexthdrp, IPPROTO_ROUTING);
+
+ /* It is no longer safe to free the pointers in exthdrs. */
+ exthdrs.merged = TRUE;
+
+#undef MAKE_CHAIN
+
+#if IPSEC
+ if (ip6obf.needipsec && (m->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA))
+ in6_delayed_cksum_offset(m, 0, optlen, nxt0);
+#endif /* IPSEC */
+
+ if (!TAILQ_EMPTY(&ipv6_filters) &&
+ !((flags & IPV6_OUTARGS) &&
+ (ip6oa->ip6oa_flags & IP6OAF_INTCOPROC_ALLOWED))) {
+ struct ipfilter *filter;
+ int seen = (inject_filter_ref == NULL);
+ int fixscope = 0;
+
+ if (im6o != NULL && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ ippo->ippo_flags |= IPPOF_MCAST_OPTS;
+ IM6O_LOCK(im6o);
+ ippo->ippo_mcast_ifnet = im6o->im6o_multicast_ifp;
+ ippo->ippo_mcast_ttl = im6o->im6o_multicast_hlim;
+ ippo->ippo_mcast_loop = im6o->im6o_multicast_loop;
+ IM6O_UNLOCK(im6o);
+ }
+
+ /* Hack: embed the scope_id in the destination */
+ if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst) &&
+ (ip6->ip6_dst.s6_addr16[1] == 0) && (ro != NULL)) {
+ fixscope = 1;
+ ip6->ip6_dst.s6_addr16[1] =
+ htons(ro->ro_dst.sin6_scope_id);
+ }
+
+ ipf_ref();
+ TAILQ_FOREACH(filter, &ipv6_filters, ipf_link) {
+ /*
+ * Don't process packet twice if we've already seen it.
+ */
+ if (seen == 0) {
+ if ((struct ipfilter *)inject_filter_ref ==
+ filter)
+ seen = 1;
+ } else if (filter->ipf_filter.ipf_output != NULL) {
+ errno_t result;
+
+ result = filter->ipf_filter.ipf_output(
+ filter->ipf_filter.cookie,
+ (mbuf_t *)&m, ippo);
+ if (result == EJUSTRETURN) {
+ ipf_unref();
+ m = NULL;
+ goto evaluateloop;
+ }
+ if (result != 0) {
+ ipf_unref();
+ goto bad;
}
- ipf_unref();
- lck_mtx_lock(ip6_mutex);
}
- /* Hack: cleanup embedded scope_id if we put it there */
- if (fixscope)
- ip6->ip6_dst.s6_addr16[1] = 0;
}
+ ipf_unref();
+
+ ip6 = mtod(m, struct ip6_hdr *);
+ /* Hack: cleanup embedded scope_id if we put it there */
+ if (fixscope)
+ ip6->ip6_dst.s6_addr16[1] = 0;
+ }
#if IPSEC
- if (!needipsec)
- goto skip_ipsec2;
+ if (ip6obf.needipsec) {
+ int segleft_org;
/*
* pointers after IPsec headers are not valid any more.
*/
exthdrs.ip6e_dest2 = NULL;
- {
- struct ip6_rthdr *rh = NULL;
- int segleft_org = 0;
- struct ipsec_output_state state;
-
- if (exthdrs.ip6e_rthdr) {
+ if (exthdrs.ip6e_rthdr != NULL) {
rh = mtod(exthdrs.ip6e_rthdr, struct ip6_rthdr *);
segleft_org = rh->ip6r_segleft;
rh->ip6r_segleft = 0;
+ } else {
+ rh = NULL;
+ segleft_org = 0;
}
- bzero(&state, sizeof(state));
- state.m = m;
- lck_mtx_unlock(ip6_mutex);
- lck_mtx_lock(sadb_mutex);
- error = ipsec6_output_trans(&state, nexthdrp, mprev, sp, flags,
- &needipsectun);
- lck_mtx_unlock(sadb_mutex);
- lck_mtx_lock(ip6_mutex);
- m = state.m;
+ ipsec_state.m = m;
+ error = ipsec6_output_trans(&ipsec_state, nexthdrp, mprev,
+ sp, flags, &needipsectun);
+ m = ipsec_state.m;
if (error) {
/* mbuf is already reclaimed in ipsec6_output_trans. */
m = NULL;
case ENOMEM:
break;
default:
- printf("ip6_output (ipsec): error code %d\n", error);
- /* fall through */
+ printf("ip6_output (ipsec): error code %d\n",
+ error);
+ /* FALLTHRU */
case ENOENT:
/* don't show these error codes to the user */
error = 0;
}
goto bad;
}
- if (exthdrs.ip6e_rthdr) {
+ if (exthdrs.ip6e_rthdr != NULL) {
/* ah6_output doesn't modify mbuf chain */
rh->ip6r_segleft = segleft_org;
}
- }
-skip_ipsec2:;
-#endif
}
+#endif /* IPSEC */
/*
- * If there is a routing header, replace destination address field
+ * If there is a routing header, replace the destination address field
* with the first hop of the routing header.
*/
- if (exthdrs.ip6e_rthdr) {
- struct ip6_rthdr *rh =
- (struct ip6_rthdr *)(mtod(exthdrs.ip6e_rthdr,
- struct ip6_rthdr *));
+ if (exthdrs.ip6e_rthdr != NULL) {
struct ip6_rthdr0 *rh0;
+ struct in6_addr *addr;
+ struct sockaddr_in6 sa;
- finaldst = ip6->ip6_dst;
+ rh = (struct ip6_rthdr *)
+ (mtod(exthdrs.ip6e_rthdr, struct ip6_rthdr *));
switch (rh->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
- rh0 = (struct ip6_rthdr0 *)rh;
- ip6->ip6_dst = rh0->ip6r0_addr[0];
- bcopy((caddr_t)&rh0->ip6r0_addr[1],
- (caddr_t)&rh0->ip6r0_addr[0],
- sizeof(struct in6_addr)*(rh0->ip6r0_segleft - 1)
- );
- rh0->ip6r0_addr[rh0->ip6r0_segleft - 1] = finaldst;
- break;
+ rh0 = (struct ip6_rthdr0 *)rh;
+ addr = (struct in6_addr *)(void *)(rh0 + 1);
+
+ /*
+ * construct a sockaddr_in6 form of
+ * the first hop.
+ *
+ * XXX: we may not have enough
+ * information about its scope zone;
+ * there is no standard API to pass
+ * the information from the
+ * application.
+ */
+ bzero(&sa, sizeof (sa));
+ sa.sin6_family = AF_INET6;
+ sa.sin6_len = sizeof (sa);
+ sa.sin6_addr = addr[0];
+ if ((error = sa6_embedscope(&sa,
+ ip6_use_defzone)) != 0) {
+ goto bad;
+ }
+ ip6->ip6_dst = sa.sin6_addr;
+ bcopy(&addr[1], &addr[0], sizeof (struct in6_addr) *
+ (rh0->ip6r0_segleft - 1));
+ addr[rh0->ip6r0_segleft - 1] = finaldst;
+ /* XXX */
+ in6_clearscope(addr + rh0->ip6r0_segleft - 1);
+ break;
default: /* is it possible? */
- error = EINVAL;
- goto bad;
+ error = EINVAL;
+ goto bad;
}
}
/* Source address validation */
if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src) &&
- (flags & IPV6_DADOUTPUT) == 0) {
+ !(flags & IPV6_UNSPECSRC)) {
error = EOPNOTSUPP;
ip6stat.ip6s_badscope++;
goto bad;
/*
* Route packet.
*/
- if (ro == 0) {
+ if (ro == NULL) {
ro = &ip6route;
- bzero((caddr_t)ro, sizeof(*ro));
+ bzero((caddr_t)ro, sizeof (*ro));
}
ro_pmtu = ro;
- if (opt && opt->ip6po_rthdr)
+ if (opt != NULL && opt->ip6po_rthdr)
ro = &opt->ip6po_route;
- dst = (struct sockaddr_in6 *)&ro->ro_dst;
+ dst = SIN6(&ro->ro_dst);
+
+ if (ro->ro_rt != NULL)
+ RT_LOCK_ASSERT_NOTHELD(ro->ro_rt);
/*
- * If there is a cached route,
- * check that it is to the same destination
- * and is still up. If not, free it and try again.
+ * if specified, try to fill in the traffic class field.
+ * do not override if a non-zero value is already set.
+ * we check the diffserv field and the ecn field separately.
*/
- if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 ||
- dst->sin6_family != AF_INET6 ||
- !IN6_ARE_ADDR_EQUAL(&dst->sin6_addr, &ip6->ip6_dst) ||
- ro->ro_rt->generation_id != route_generation)) {
- rtfree(ro->ro_rt);
- ro->ro_rt = (struct rtentry *)0;
- }
- if (ro->ro_rt == 0) {
- bzero(dst, sizeof(*dst));
+ if (opt != NULL && opt->ip6po_tclass >= 0) {
+ int mask = 0;
+
+ if ((ip6->ip6_flow & htonl(0xfc << 20)) == 0)
+ mask |= 0xfc;
+ if ((ip6->ip6_flow & htonl(0x03 << 20)) == 0)
+ mask |= 0x03;
+ if (mask != 0) {
+ ip6->ip6_flow |=
+ htonl((opt->ip6po_tclass & mask) << 20);
+ }
+ }
+
+ /* fill in or override the hop limit field, if necessary. */
+ if (opt && opt->ip6po_hlim != -1) {
+ ip6->ip6_hlim = opt->ip6po_hlim & 0xff;
+ } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ if (im6o != NULL) {
+ IM6O_LOCK(im6o);
+ ip6->ip6_hlim = im6o->im6o_multicast_hlim;
+ IM6O_UNLOCK(im6o);
+ } else {
+ ip6->ip6_hlim = ip6_defmcasthlim;
+ }
+ }
+
+ /*
+ * If there is a cached route, check that it is to the same
+ * destination and is still up. If not, free it and try again.
+ * Test rt_flags without holding rt_lock for performance reasons;
+ * if the route is down it will hopefully be caught by the layer
+ * below (since it uses this route as a hint) or during the
+ * next transmit.
+ */
+ if (ROUTE_UNUSABLE(ro) || dst->sin6_family != AF_INET6 ||
+ !IN6_ARE_ADDR_EQUAL(&dst->sin6_addr, &ip6->ip6_dst))
+ ROUTE_RELEASE(ro);
+
+ if (ro->ro_rt == NULL) {
+ bzero(dst, sizeof (*dst));
dst->sin6_family = AF_INET6;
- dst->sin6_len = sizeof(struct sockaddr_in6);
+ dst->sin6_len = sizeof (struct sockaddr_in6);
dst->sin6_addr = ip6->ip6_dst;
-#if SCOPEDROUTING
- /* XXX: sin6_scope_id should already be fixed at this point */
- if (IN6_IS_SCOPE_LINKLOCAL(&dst->sin6_addr))
- dst->sin6_scope_id = ntohs(dst->sin6_addr.s6_addr16[1]);
-#endif
}
#if IPSEC
- if (needipsec && needipsectun) {
- struct ipsec_output_state state;
-
+ if (ip6obf.needipsec && needipsectun) {
+#if CONFIG_DTRACE
+ struct ifnet *trace_ifp = (ifpp_save != NULL) ? (*ifpp_save) : NULL;
+#endif /* CONFIG_DTRACE */
/*
* All the extension headers will become inaccessible
* (since they can be encrypted).
*
* IPv6 [ESP|AH] IPv6 [extension headers] payload
*/
- bzero(&exthdrs, sizeof(exthdrs));
+ bzero(&exthdrs, sizeof (exthdrs));
exthdrs.ip6e_ip6 = m;
- bzero(&state, sizeof(state));
- state.m = m;
- state.ro = (struct route *)ro;
- state.dst = (struct sockaddr *)dst;
- lck_mtx_unlock(ip6_mutex);
- lck_mtx_lock(sadb_mutex);
- error = ipsec6_output_tunnel(&state, sp, flags);
- lck_mtx_unlock(sadb_mutex);
- lck_mtx_lock(ip6_mutex);
- m = state.m;
- ro = (struct route_in6 *)state.ro;
- dst = (struct sockaddr_in6 *)state.dst;
+ ipsec_state.m = m;
+ route_copyout((struct route *)&ipsec_state.ro, (struct route *)ro,
+ sizeof (struct route_in6));
+ ipsec_state.dst = SA(dst);
+
+ /* So that we can see packets inside the tunnel */
+ DTRACE_IP6(send, struct mbuf *, m, struct inpcb *, NULL,
+ struct ip6_hdr *, ip6, struct ifnet *, trace_ifp,
+ struct ip *, NULL, struct ip6_hdr *, ip6);
+
+ error = ipsec6_output_tunnel(&ipsec_state, sp, flags);
+ /* tunneled in IPv4? packet is gone */
+ if (ipsec_state.tunneled == 4) {
+ m = NULL;
+ goto evaluateloop;
+ }
+ m = ipsec_state.m;
+ ipsec_saved_route = ro;
+ ro = (struct route_in6 *)&ipsec_state.ro;
+ dst = SIN6(ipsec_state.dst);
if (error) {
/* mbuf is already reclaimed in ipsec6_output_tunnel. */
- m0 = m = NULL;
m = NULL;
switch (error) {
case EHOSTUNREACH:
case ENOMEM:
break;
default:
- printf("ip6_output (ipsec): error code %d\n", error);
- /* fall through */
+ printf("ip6_output (ipsec): error code %d\n",
+ error);
+ /* FALLTHRU */
case ENOENT:
/* don't show these error codes to the user */
error = 0;
break;
}
- lck_mtx_unlock(sadb_mutex);
goto bad;
}
-
+ /*
+ * The packet has been encapsulated so the ifscope
+ * is no longer valid since it does not apply to the
+ * outer address: ignore the ifscope.
+ */
+ if (flags & IPV6_OUTARGS) {
+ ip6oa->ip6oa_boundif = IFSCOPE_NONE;
+ ip6oa->ip6oa_flags &= ~IP6OAF_BOUND_IF;
+ }
+ if (opt != NULL && opt->ip6po_pktinfo != NULL) {
+ if (opt->ip6po_pktinfo->ipi6_ifindex != IFSCOPE_NONE)
+ opt->ip6po_pktinfo->ipi6_ifindex = IFSCOPE_NONE;
+ }
exthdrs.ip6e_ip6 = m;
}
#endif /* IPSEC */
- if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
- /* Unicast */
-
-#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
-#define sin6tosa(sin6) ((struct sockaddr *)(sin6))
- /* xxx
- * interface selection comes here
- * if an interface is specified from an upper layer,
- * ifp must point it.
- */
- lck_mtx_lock(rt_mtx);
- if (ro->ro_rt == 0) {
- /*
- * non-bsdi always clone routes, if parent is
- * PRF_CLONING.
- */
- rtalloc_ign_locked((struct route *)ro, 0UL);
- }
- if (ro->ro_rt == 0) {
- ip6stat.ip6s_noroute++;
- error = EHOSTUNREACH;
- lck_mtx_unlock(rt_mtx);
- /* XXX in6_ifstat_inc(ifp, ifs6_out_discard); */
- goto bad;
- }
- ia = ifatoia6(ro->ro_rt->rt_ifa);
- ifp = ro->ro_rt->rt_ifp;
- ro->ro_rt->rt_use++;
- if (ro->ro_rt->rt_flags & RTF_GATEWAY)
- dst = (struct sockaddr_in6 *)ro->ro_rt->rt_gateway;
- lck_mtx_unlock(rt_mtx);
- m->m_flags &= ~(M_BCAST | M_MCAST); /* just in case */
+ /*
+ * ifp should only be filled in for dummy net packets which will jump
+ * to check_with_pf label.
+ */
+ if (ifp != NULL) {
+ VERIFY(ip6obf.route_selected);
+ }
- in6_ifstat_inc(ifp, ifs6_out_request);
+ /* adjust pointer */
+ ip6 = mtod(m, struct ip6_hdr *);
- /*
- * Check if the outgoing interface conflicts with
- * the interface specified by ifi6_ifindex (if specified).
- * Note that loopback interface is always okay.
- * (this may happen when we are sending a packet to one of
- * our own addresses.)
- */
- if (opt && opt->ip6po_pktinfo
- && opt->ip6po_pktinfo->ipi6_ifindex) {
- if (!(ifp->if_flags & IFF_LOOPBACK)
- && ifp->if_index != opt->ip6po_pktinfo->ipi6_ifindex) {
+ if (ip6obf.select_srcif) {
+ bzero(&src_sa, sizeof (src_sa));
+ src_sa.sin6_family = AF_INET6;
+ src_sa.sin6_len = sizeof (src_sa);
+ src_sa.sin6_addr = ip6->ip6_src;
+ }
+ bzero(&dst_sa, sizeof (dst_sa));
+ dst_sa.sin6_family = AF_INET6;
+ dst_sa.sin6_len = sizeof (dst_sa);
+ dst_sa.sin6_addr = ip6->ip6_dst;
+
+ /*
+ * Only call in6_selectroute() on first iteration to avoid taking
+ * multiple references on ifp and rt.
+ *
+ * in6_selectroute() might return an ifp with its reference held
+ * even in the error case, so make sure to release its reference.
+ * ip6oa may be NULL if IPV6_OUTARGS isn't set.
+ */
+ if (!ip6obf.route_selected) {
+ error = in6_selectroute( ip6obf.select_srcif ? &src_sa : NULL,
+ &dst_sa, opt, im6o, &src_ia, ro, &ifp, &rt, 0, ip6oa);
+
+ if (error != 0) {
+ switch (error) {
+ case EHOSTUNREACH:
ip6stat.ip6s_noroute++;
- in6_ifstat_inc(ifp, ifs6_out_discard);
- error = EHOSTUNREACH;
- goto bad;
+ break;
+ case EADDRNOTAVAIL:
+ default:
+ break; /* XXX statistics? */
}
+ if (ifp != NULL)
+ in6_ifstat_inc(ifp, ifs6_out_discard);
+ /* ifp (if non-NULL) will be released at the end */
+ goto bad;
}
-
- if (opt && opt->ip6po_hlim != -1)
- ip6->ip6_hlim = opt->ip6po_hlim & 0xff;
- } else {
- /* Multicast */
- struct in6_multi *in6m;
-
- m->m_flags = (m->m_flags & ~M_BCAST) | M_MCAST;
-
+ ip6obf.route_selected = TRUE;
+ }
+ if (rt == NULL) {
/*
- * See if the caller provided any multicast options
+ * If in6_selectroute() does not return a route entry,
+ * dst may not have been updated.
*/
- ifp = NULL;
- if (im6o != NULL) {
- ip6->ip6_hlim = im6o->im6o_multicast_hlim;
- if (im6o->im6o_multicast_ifp != NULL)
- ifp = im6o->im6o_multicast_ifp;
- } else
- ip6->ip6_hlim = ip6_defmcasthlim;
+ *dst = dst_sa; /* XXX */
+ }
- /*
- * See if the caller provided the outgoing interface
- * as an ancillary data.
- * Boundary check for ifindex is assumed to be already done.
- */
- if (opt && opt->ip6po_pktinfo && opt->ip6po_pktinfo->ipi6_ifindex)
- ifp = ifindex2ifnet[opt->ip6po_pktinfo->ipi6_ifindex];
+#if NECP
+ /* Catch-all to check if the interface is allowed */
+ if (!necp_packet_is_allowed_over_interface(m, ifp)) {
+ error = EHOSTUNREACH;
+ ip6stat.ip6s_necp_policy_drop++;
+ goto bad;
+ }
+#endif /* NECP */
- /*
- * If the destination is a node-local scope multicast,
- * the packet should be loop-backed only.
- */
- if (IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst)) {
- /*
- * If the outgoing interface is already specified,
- * it should be a loopback interface.
- */
- if (ifp && (ifp->if_flags & IFF_LOOPBACK) == 0) {
- ip6stat.ip6s_badscope++;
- error = ENETUNREACH; /* XXX: better error? */
- /* XXX correct ifp? */
- in6_ifstat_inc(ifp, ifs6_out_discard);
- goto bad;
- } else {
- ifp = &loif[0];
- }
+ /*
+ * then rt (for unicast) and ifp must be non-NULL valid values.
+ */
+ if (!(flags & IPV6_FORWARDING)) {
+ in6_ifstat_inc_na(ifp, ifs6_out_request);
+ }
+ if (rt != NULL) {
+ RT_LOCK(rt);
+ if (ia == NULL) {
+ ia = (struct in6_ifaddr *)(rt->rt_ifa);
+ if (ia != NULL)
+ IFA_ADDREF(&ia->ia_ifa);
}
+ rt->rt_use++;
+ RT_UNLOCK(rt);
+ }
+
+ /*
+ * The outgoing interface must be in the zone of source and
+ * destination addresses (except local/loopback). We should
+ * use ia_ifp to support the case of sending packets to an
+ * address of our own.
+ */
+ if (ia != NULL && ia->ia_ifp) {
+ ifnet_reference(ia->ia_ifp); /* for origifp */
+ if (origifp != NULL)
+ ifnet_release(origifp);
+ origifp = ia->ia_ifp;
+ } else {
+ if (ifp != NULL)
+ ifnet_reference(ifp); /* for origifp */
+ if (origifp != NULL)
+ ifnet_release(origifp);
+ origifp = ifp;
+ }
- if (opt && opt->ip6po_hlim != -1)
- ip6->ip6_hlim = opt->ip6po_hlim & 0xff;
+ /* skip scope enforcements for local/loopback route */
+ if (rt == NULL || !(rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
+ struct in6_addr src0, dst0;
+ u_int32_t zone;
+
+ src0 = ip6->ip6_src;
+ if (in6_setscope(&src0, origifp, &zone))
+ goto badscope;
+ bzero(&src_sa, sizeof (src_sa));
+ src_sa.sin6_family = AF_INET6;
+ src_sa.sin6_len = sizeof (src_sa);
+ src_sa.sin6_addr = ip6->ip6_src;
+ if ((sa6_recoverscope(&src_sa, TRUE) ||
+ zone != src_sa.sin6_scope_id))
+ goto badscope;
+
+ dst0 = ip6->ip6_dst;
+ if ((in6_setscope(&dst0, origifp, &zone)))
+ goto badscope;
+ /* re-initialize to be sure */
+ bzero(&dst_sa, sizeof (dst_sa));
+ dst_sa.sin6_family = AF_INET6;
+ dst_sa.sin6_len = sizeof (dst_sa);
+ dst_sa.sin6_addr = ip6->ip6_dst;
+ if ((sa6_recoverscope(&dst_sa, TRUE) ||
+ zone != dst_sa.sin6_scope_id))
+ goto badscope;
+
+ /* scope check is done. */
+ goto routefound;
+
+badscope:
+ ip6stat.ip6s_badscope++;
+ in6_ifstat_inc(origifp, ifs6_out_discard);
+ if (error == 0)
+ error = EHOSTUNREACH; /* XXX */
+ goto bad;
+ }
+routefound:
+ if (rt != NULL && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ if (opt != NULL && opt->ip6po_nextroute.ro_rt) {
+ /*
+ * The nexthop is explicitly specified by the
+ * application. We assume the next hop is an IPv6
+ * address.
+ */
+ dst = SIN6(opt->ip6po_nexthop);
+ } else if ((rt->rt_flags & RTF_GATEWAY)) {
+ dst = SIN6(rt->rt_gateway);
+ }
/*
- * If caller did not provide an interface lookup a
- * default in the routing table. This is either a
- * default for the speicfied group (i.e. a host
- * route), or a multicast default (a route for the
- * ``net'' ff00::/8).
+ * For packets destined to local/loopback, record the
+ * source the source interface (which owns the source
+ * address), as well as the output interface. This is
+ * needed to reconstruct the embedded zone for the
+ * link-local address case in ip6_input().
*/
- if (ifp == NULL) {
- lck_mtx_lock(rt_mtx);
- if (ro->ro_rt == 0) {
- ro->ro_rt = rtalloc1_locked((struct sockaddr *)
- &ro->ro_dst, 0, 0UL);
- }
- if (ro->ro_rt == 0) {
- ip6stat.ip6s_noroute++;
- lck_mtx_unlock(rt_mtx);
- error = EHOSTUNREACH;
- /* XXX in6_ifstat_inc(ifp, ifs6_out_discard) */
- goto bad;
- }
- ia = ifatoia6(ro->ro_rt->rt_ifa);
- ifp = ro->ro_rt->rt_ifp;
- ro->ro_rt->rt_use++;
- lck_mtx_unlock(rt_mtx);
+ if (ia != NULL && (ifp->if_flags & IFF_LOOPBACK)) {
+ uint32_t srcidx;
+
+ if (src_ia != NULL)
+ srcidx = src_ia->ia_ifp->if_index;
+ else if (ro->ro_srcia != NULL)
+ srcidx = ro->ro_srcia->ifa_ifp->if_index;
+ else
+ srcidx = 0;
+
+ ip6_setsrcifaddr_info(m, srcidx, NULL);
+ ip6_setdstifaddr_info(m, 0, ia);
}
+ }
+
+ if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ m->m_flags &= ~(M_BCAST | M_MCAST); /* just in case */
+ } else {
+ struct in6_multi *in6m;
- if ((flags & IPV6_FORWARDING) == 0)
- in6_ifstat_inc(ifp, ifs6_out_request);
- in6_ifstat_inc(ifp, ifs6_out_mcast);
+ m->m_flags = (m->m_flags & ~M_BCAST) | M_MCAST;
+ in6_ifstat_inc_na(ifp, ifs6_out_mcast);
/*
* Confirm that the outgoing interface supports multicast.
*/
- if ((ifp->if_flags & IFF_MULTICAST) == 0) {
+ if (!(ifp->if_flags & IFF_MULTICAST)) {
ip6stat.ip6s_noroute++;
in6_ifstat_inc(ifp, ifs6_out_discard);
error = ENETUNREACH;
goto bad;
}
- ifnet_lock_shared(ifp);
- IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m);
- ifnet_lock_done(ifp);
+ in6_multihead_lock_shared();
+ IN6_LOOKUP_MULTI(&ip6->ip6_dst, ifp, in6m);
+ in6_multihead_lock_done();
+ if (im6o != NULL)
+ IM6O_LOCK(im6o);
if (in6m != NULL &&
- (im6o == NULL || im6o->im6o_multicast_loop)) {
+ (im6o == NULL || im6o->im6o_multicast_loop)) {
+ if (im6o != NULL)
+ IM6O_UNLOCK(im6o);
/*
* If we belong to the destination multicast group
* on the outgoing interface, and the caller did not
* forbid loopback, loop back a copy.
*/
- ip6_mloopback(ifp, m, dst);
- } else {
- /*
- * If we are acting as a multicast router, perform
- * multicast forwarding as if the packet had just
- * arrived on the interface to which we are about
- * to send. The multicast forwarding function
- * recursively calls this function, using the
- * IPV6_FORWARDING flag to prevent infinite recursion.
- *
- * Multicasts that are looped back by ip6_mloopback(),
- * above, will be forwarded by the ip6_input() routine,
- * if necessary.
- */
- if (ip6_mrouter && (flags & IPV6_FORWARDING) == 0) {
- if (ip6_mforward(ip6, ifp, m) != NULL) {
- m_freem(m);
- goto done;
- }
- }
- }
+ ip6_mloopback(NULL, ifp, m, dst, optlen, nxt0);
+ } else if (im6o != NULL)
+ IM6O_UNLOCK(im6o);
+ if (in6m != NULL)
+ IN6M_REMREF(in6m);
/*
* Multicasts with a hoplimit of zero may be looped back,
* above, but must not be transmitted on a network.
* loop back a copy if this host actually belongs to the
* destination group on the loopback interface.
*/
- if (ip6->ip6_hlim == 0 || (ifp->if_flags & IFF_LOOPBACK)) {
- m_freem(m);
- goto done;
+ if (ip6->ip6_hlim == 0 || (ifp->if_flags & IFF_LOOPBACK) ||
+ IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst)) {
+ /* remove m from the packetchain and continue looping */
+ if (m != NULL)
+ m_freem(m);
+ m = NULL;
+ goto evaluateloop;
}
}
* Fill the outgoing inteface to tell the upper layer
* to increment per-interface statistics.
*/
- if (ifpp)
+ if (ifpp != NULL && *ifpp == NULL) {
+ ifnet_reference(ifp); /* for caller */
*ifpp = ifp;
-
- /*
- * Determine path MTU.
- */
- if (ro_pmtu != ro) {
- /* The first hop and the final destination may differ. */
- struct sockaddr_in6 *sin6_fin =
- (struct sockaddr_in6 *)&ro_pmtu->ro_dst;
- if (ro_pmtu->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 ||
- !IN6_ARE_ADDR_EQUAL(&sin6_fin->sin6_addr,
- &finaldst))) {
- rtfree(ro_pmtu->ro_rt);
- ro_pmtu->ro_rt = (struct rtentry *)0;
- }
- if (ro_pmtu->ro_rt == 0) {
- bzero(sin6_fin, sizeof(*sin6_fin));
- sin6_fin->sin6_family = AF_INET6;
- sin6_fin->sin6_len = sizeof(struct sockaddr_in6);
- sin6_fin->sin6_addr = finaldst;
-
- rtalloc((struct route *)ro_pmtu);
- }
}
- if (ro_pmtu->ro_rt != NULL) {
- u_int32_t ifmtu = nd_ifinfo[ifp->if_index].linkmtu;
- mtu = ro_pmtu->ro_rt->rt_rmx.rmx_mtu;
- if (mtu > ifmtu || mtu == 0) {
- /*
- * The MTU on the route is larger than the MTU on
- * the interface! This shouldn't happen, unless the
- * MTU of the interface has been changed after the
- * interface was brought up. Change the MTU in the
- * route to match the interface MTU (as long as the
- * field isn't locked).
- *
- * if MTU on the route is 0, we need to fix the MTU.
- * this case happens with path MTU discovery timeouts.
- */
- mtu = ifmtu;
- if ((ro_pmtu->ro_rt->rt_rmx.rmx_locks & RTV_MTU) == 0)
- ro_pmtu->ro_rt->rt_rmx.rmx_mtu = mtu; /* XXX */
- }
- } else {
- mtu = nd_ifinfo[ifp->if_index].linkmtu;
- }
+ /* Determine path MTU. */
+ if ((error = ip6_getpmtu(ro_pmtu, ro, ifp, &finaldst, &mtu,
+ &alwaysfrag)) != 0)
+ goto bad;
/*
- * advanced API (IPV6_USE_MIN_MTU) overrides mtu setting
+ * The caller of this function may specify to use the minimum MTU
+ * in some cases.
+ * An advanced API option (IPV6_USE_MIN_MTU) can also override MTU
+ * setting. The logic is a bit complicated; by default, unicast
+ * packets will follow path MTU while multicast packets will be sent at
+ * the minimum MTU. If IP6PO_MINMTU_ALL is specified, all packets
+ * including unicast ones will be sent at the minimum MTU. Multicast
+ * packets will always be sent at the minimum MTU unless
+ * IP6PO_MINMTU_DISABLE is explicitly specified.
+ * See RFC 3542 for more details.
*/
- if ((flags & IPV6_MINMTU) != 0 && mtu > IPV6_MMTU)
- mtu = IPV6_MMTU;
-
- /* Fake scoped addresses */
- if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
- /*
- * If source or destination address is a scoped address, and
- * the packet is going to be sent to a loopback interface,
- * we should keep the original interface.
- */
-
- /*
- * XXX: this is a very experimental and temporary solution.
- * We eventually have sockaddr_in6 and use the sin6_scope_id
- * field of the structure here.
- * We rely on the consistency between two scope zone ids
- * of source and destination, which should already be assured.
- * Larger scopes than link will be supported in the future.
- */
- origifp = NULL;
- if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src))
- origifp = ifindex2ifnet[ntohs(ip6->ip6_src.s6_addr16[1])];
- else if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst))
- origifp = ifindex2ifnet[ntohs(ip6->ip6_dst.s6_addr16[1])];
- /*
- * XXX: origifp can be NULL even in those two cases above.
- * For example, if we remove the (only) link-local address
- * from the loopback interface, and try to send a link-local
- * address without link-id information. Then the source
- * address is ::1, and the destination address is the
- * link-local address with its s6_addr16[1] being zero.
- * What is worse, if the packet goes to the loopback interface
- * by a default rejected route, the null pointer would be
- * passed to looutput, and the kernel would hang.
- * The following last resort would prevent such disaster.
- */
- if (origifp == NULL)
- origifp = ifp;
+ if (mtu > IPV6_MMTU) {
+ if ((flags & IPV6_MINMTU)) {
+ mtu = IPV6_MMTU;
+ } else if (opt && opt->ip6po_minmtu == IP6PO_MINMTU_ALL) {
+ mtu = IPV6_MMTU;
+ } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
+ (opt == NULL ||
+ opt->ip6po_minmtu != IP6PO_MINMTU_DISABLE)) {
+ mtu = IPV6_MMTU;
+ }
}
- else
- origifp = ifp;
-#ifndef SCOPEDROUTING
+
/*
* clear embedded scope identifiers if necessary.
* in6_clearscope will touch the addresses only when necessary.
*/
in6_clearscope(&ip6->ip6_src);
in6_clearscope(&ip6->ip6_dst);
-#endif
-
- /*
- * Check with the firewall...
- */
- if (ip6_fw_enable && ip6_fw_chk_ptr) {
- u_short port = 0;
- m->m_pkthdr.rcvif = NULL; /* XXX */
- /* If ipfw says divert, we have to just drop packet */
- if (ip6_fw_chk_ptr(&ip6, ifp, &port, &m)) {
- m_freem(m);
- goto done;
- }
- if (!m) {
- error = EACCES;
- goto done;
- }
- }
-
/*
* If the outgoing packet contains a hop-by-hop options header,
* it must be examined and processed even by the source node.
* (RFC 2460, section 4.)
*/
- if (exthdrs.ip6e_hbh) {
+ if (exthdrs.ip6e_hbh != NULL) {
struct ip6_hbh *hbh = mtod(exthdrs.ip6e_hbh, struct ip6_hbh *);
- u_int32_t dummy1; /* XXX unused */
- u_int32_t dummy2; /* XXX unused */
-
+ u_int32_t dummy; /* XXX unused */
+ uint32_t oplen = 0; /* for ip6_process_hopopts() */
#if DIAGNOSTIC
if ((hbh->ip6h_len + 1) << 3 > exthdrs.ip6e_hbh->m_len)
panic("ip6e_hbh is not continuous");
#endif
/*
- * XXX: if we have to send an ICMPv6 error to the sender,
- * we need the M_LOOP flag since icmp6_error() expects
- * the IPv6 and the hop-by-hop options header are
- * continuous unless the flag is set.
+ * XXX: If we have to send an ICMPv6 error to the sender,
+ * we need the M_LOOP flag since icmp6_error() expects
+ * the IPv6 and the hop-by-hop options header are
+ * continuous unless the flag is set.
*/
m->m_flags |= M_LOOP;
m->m_pkthdr.rcvif = ifp;
- if (ip6_process_hopopts(m,
- (u_int8_t *)(hbh + 1),
- ((hbh->ip6h_len + 1) << 3) -
- sizeof(struct ip6_hbh),
- &dummy1, &dummy2) < 0) {
- /* m was already freed at this point */
- error = EINVAL;/* better error? */
- goto done;
+ if (ip6_process_hopopts(m, (u_int8_t *)(hbh + 1),
+ ((hbh->ip6h_len + 1) << 3) - sizeof (struct ip6_hbh),
+ &dummy, &oplen) < 0) {
+ /*
+ * m was already freed at this point. Set to NULL so it
+ * is not re-freed at end of ip6_output_list.
+ */
+ m = NULL;
+ error = EINVAL; /* better error? */
+ goto bad;
}
m->m_flags &= ~M_LOOP; /* XXX */
m->m_pkthdr.rcvif = NULL;
}
+#if DUMMYNET
+check_with_pf:
+#endif /* DUMMYNET */
+#if PF
+ if (PF_IS_ENABLED) {
+#if DUMMYNET
+
+ /*
+ * TODO: Need to save opt->ip6po_flags for reinjection
+ * rdar://10434993
+ */
+ args.fwa_m = m;
+ args.fwa_oif = ifp;
+ args.fwa_oflags = flags;
+ if (flags & IPV6_OUTARGS)
+ args.fwa_ip6oa = ip6oa;
+ args.fwa_ro6 = ro;
+ args.fwa_dst6 = dst;
+ args.fwa_ro6_pmtu = ro_pmtu;
+ args.fwa_origifp = origifp;
+ args.fwa_mtu = mtu;
+ args.fwa_alwaysfrag = alwaysfrag;
+ args.fwa_unfragpartlen = unfragpartlen;
+ args.fwa_exthdrs = &exthdrs;
+ /* Invoke outbound packet filter */
+ error = pf_af_hook(ifp, NULL, &m, AF_INET6, FALSE, &args);
+#else /* !DUMMYNET */
+ error = pf_af_hook(ifp, NULL, &m, AF_INET6, FALSE, NULL);
+#endif /* !DUMMYNET */
+
+ if (error != 0 || m == NULL) {
+ if (m != NULL) {
+ panic("%s: unexpected packet %p\n",
+ __func__, m);
+ /* NOTREACHED */
+ }
+ /* m was already freed by callee and is now NULL. */
+ goto evaluateloop;
+ }
+ ip6 = mtod(m, struct ip6_hdr *);
+ }
+#endif /* PF */
+
+#ifdef IPSEC
+ /* clean ipsec history before fragmentation */
+ ipsec_delaux(m);
+#endif /* IPSEC */
+
+ if (ip6oa != NULL) {
+ u_int8_t dscp;
+
+ dscp = (ntohl(ip6->ip6_flow) & IP6FLOW_DSCP_MASK) >> IP6FLOW_DSCP_SHIFT;
+
+ error = set_packet_qos(m, ifp,
+ ip6oa->ip6oa_flags & IP6OAF_QOSMARKING_ALLOWED ? TRUE : FALSE,
+ ip6oa->ip6oa_sotc, ip6oa->ip6oa_netsvctype, &dscp);
+ if (error == 0) {
+ ip6->ip6_flow &= ~htonl(IP6FLOW_DSCP_MASK);
+ ip6->ip6_flow |= htonl((u_int32_t)dscp << IP6FLOW_DSCP_SHIFT);
+ } else {
+ printf("%s if_dscp_for_mbuf() error %d\n", __func__, error);
+ error = 0;
+ }
+ }
/*
- * Send the packet to the outgoing interface.
- * If necessary, do IPv6 fragmentation before sending.
+ * Determine whether fragmentation is necessary. If so, m is passed
+ * back as a chain of packets and original mbuf is freed. Otherwise, m
+ * is unchanged.
*/
- tlen = m->m_pkthdr.len;
- if (tlen <= mtu
-#if notyet
- /*
- * On any link that cannot convey a 1280-octet packet in one piece,
- * link-specific fragmentation and reassembly must be provided at
- * a layer below IPv6. [RFC 2460, sec.5]
- * Thus if the interface has ability of link-level fragmentation,
- * we can just send the packet even if the packet size is
- * larger than the link's MTU.
- * XXX: IFF_FRAGMENTABLE (or such) flag has not been defined yet...
- */
-
- || ifp->if_flags & IFF_FRAGMENTABLE
-#endif
- )
- {
- /* Record statistics for this interface address. */
- if (ia && !(flags & IPV6_FORWARDING)) {
-#ifndef __APPLE__
- ia->ia_ifa.if_opackets++;
- ia->ia_ifa.if_obytes += m->m_pkthdr.len;
-#endif
- }
-#ifdef IPSEC
- /* clean ipsec history once it goes out of the node */
- ipsec_delaux(m);
-#endif
+ error = ip6_fragment_packet(&m, opt,
+ &exthdrs, ifp, mtu, alwaysfrag, unfragpartlen, ro_pmtu, nxt0,
+ optlen);
- error = nd6_output(ifp, origifp, m, dst, ro->ro_rt, 1);
- goto done;
- } else if (mtu < IPV6_MMTU) {
+ if (error)
+ goto bad;
+
+/*
+ * The evaluateloop label is where we decide whether to continue looping over
+ * packets or call into nd code to send.
+ */
+evaluateloop:
+
+ /*
+ * m may be NULL when we jump to the evaluateloop label from PF or
+ * other code that can drop packets.
+ */
+ if (m != NULL) {
+ /*
+ * If we already have a chain to send, tack m onto the end.
+ * Otherwise make m the start and end of the to-be-sent chain.
+ */
+ if (sendchain != NULL) {
+ sendchain_last->m_nextpkt = m;
+ } else {
+ sendchain = m;
+ }
+
+ /* Fragmentation may mean m is a chain. Find the last packet. */
+ while (m->m_nextpkt)
+ m = m->m_nextpkt;
+ sendchain_last = m;
+ pktcnt++;
+ }
+
+ /* Fill in next m from inputchain as appropriate. */
+ m = inputchain;
+ if (m != NULL) {
+ /* Isolate m from rest of input chain. */
+ inputchain = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+
+ /*
+ * Clear exthdrs and ipsec_state so stale contents are not
+ * reused. Note this also clears the exthdrs.merged flag.
+ */
+ bzero(&exthdrs, sizeof(exthdrs));
+ bzero(&ipsec_state, sizeof(ipsec_state));
+
+ /* Continue looping. */
+ goto loopit;
+ }
+
+ /*
+ * If we get here, there's no more mbufs in inputchain, so send the
+ * sendchain if there is one.
+ */
+ if (pktcnt > 0) {
+ error = nd6_output_list(ifp, origifp, sendchain, dst,
+ ro->ro_rt, adv);
+ /*
+ * Fall through to done label even in error case because
+ * nd6_output_list frees packetchain in both success and
+ * failure cases.
+ */
+ }
+
+done:
+ if (ifpp_save != NULL && *ifpp_save != NULL) {
+ ifnet_release(*ifpp_save);
+ *ifpp_save = NULL;
+ }
+ ROUTE_RELEASE(&ip6route);
+#if IPSEC
+ ROUTE_RELEASE(&ipsec_state.ro);
+ if (sp != NULL)
+ key_freesp(sp, KEY_SADB_UNLOCKED);
+#endif /* IPSEC */
+#if NECP
+ ROUTE_RELEASE(&necp_route);
+#endif /* NECP */
+#if DUMMYNET
+ ROUTE_RELEASE(&saved_route);
+ ROUTE_RELEASE(&saved_ro_pmtu);
+#endif /* DUMMYNET */
+
+ if (ia != NULL)
+ IFA_REMREF(&ia->ia_ifa);
+ if (src_ia != NULL)
+ IFA_REMREF(&src_ia->ia_ifa);
+ if (ifp != NULL)
+ ifnet_release(ifp);
+ if (origifp != NULL)
+ ifnet_release(origifp);
+ if (ip6_output_measure) {
+ net_perf_measure_time(&net_perf, &start_tv, packets_processed);
+ net_perf_histogram(&net_perf, packets_processed);
+ }
+ return (error);
+
+freehdrs:
+ if (exthdrs.ip6e_hbh != NULL) {
+ if (exthdrs.merged)
+ panic("Double free of ip6e_hbh");
+ m_freem(exthdrs.ip6e_hbh);
+ }
+ if (exthdrs.ip6e_dest1 != NULL) {
+ if (exthdrs.merged)
+ panic("Double free of ip6e_dest1");
+ m_freem(exthdrs.ip6e_dest1);
+ }
+ if (exthdrs.ip6e_rthdr != NULL) {
+ if (exthdrs.merged)
+ panic("Double free of ip6e_rthdr");
+ m_freem(exthdrs.ip6e_rthdr);
+ }
+ if (exthdrs.ip6e_dest2 != NULL) {
+ if (exthdrs.merged)
+ panic("Double free of ip6e_dest2");
+ m_freem(exthdrs.ip6e_dest2);
+ }
+ /* FALLTHRU */
+bad:
+ if (inputchain != NULL)
+ m_freem_list(inputchain);
+ if (sendchain != NULL)
+ m_freem_list(sendchain);
+ if (m != NULL)
+ m_freem(m);
+
+ goto done;
+
+#undef ipf_pktopts
+#undef exthdrs
+#undef ip6route
+#undef ipsec_state
+#undef saved_route
+#undef saved_ro_pmtu
+#undef args
+}
+
+/* ip6_fragment_packet
+ *
+ * The fragmentation logic is rather complex:
+ * 1: normal case (dontfrag == 0, alwaysfrag == 0)
+ * 1-a: send as is if tlen <= path mtu
+ * 1-b: fragment if tlen > path mtu
+ *
+ * 2: if user asks us not to fragment (dontfrag == 1)
+ * 2-a: send as is if tlen <= interface mtu
+ * 2-b: error if tlen > interface mtu
+ *
+ * 3: if we always need to attach fragment header (alwaysfrag == 1)
+ * always fragment
+ *
+ * 4: if dontfrag == 1 && alwaysfrag == 1
+ * error, as we cannot handle this conflicting request
+ */
+
+static int
+ip6_fragment_packet(struct mbuf **mptr, struct ip6_pktopts *opt,
+ struct ip6_exthdrs *exthdrsp, struct ifnet *ifp, uint32_t mtu,
+ boolean_t alwaysfrag, uint32_t unfragpartlen, struct route_in6 *ro_pmtu,
+ int nxt0, uint32_t optlen)
+{
+ VERIFY(NULL != mptr);
+ struct mbuf *m = *mptr;
+ int error = 0;
+ size_t tlen = m->m_pkthdr.len;
+ boolean_t dontfrag = (opt != NULL && (opt->ip6po_flags & IP6PO_DONTFRAG));
+
+ if (m->m_pkthdr.pkt_flags & PKTF_FORWARDED) {
+ dontfrag = TRUE;
+ /*
+ * Discard partial sum information if this packet originated
+ * from another interface; the packet would already have the
+ * final checksum and we shouldn't recompute it.
+ */
+ if ((m->m_pkthdr.csum_flags & (CSUM_DATA_VALID|CSUM_PARTIAL)) ==
+ (CSUM_DATA_VALID|CSUM_PARTIAL)) {
+ m->m_pkthdr.csum_flags &= ~CSUM_TX_FLAGS;
+ m->m_pkthdr.csum_data = 0;
+ }
+ }
+
+ if (dontfrag && alwaysfrag) { /* case 4 */
+ /* conflicting request - can't transmit */
+ return EMSGSIZE;
+ }
+
+ /* Access without acquiring nd_ifinfo lock for performance */
+ if (dontfrag && tlen > IN6_LINKMTU(ifp)) { /* case 2-b */
+ /*
+ * Even if the DONTFRAG option is specified, we cannot send the
+ * packet when the data length is larger than the MTU of the
+ * outgoing interface.
+ * Notify the error by sending IPV6_PATHMTU ancillary data as
+ * well as returning an error code (the latter is not described
+ * in the API spec.)
+ */
+ u_int32_t mtu32;
+ struct ip6ctlparam ip6cp;
+
+ mtu32 = (u_int32_t)mtu;
+ bzero(&ip6cp, sizeof (ip6cp));
+ ip6cp.ip6c_cmdarg = (void *)&mtu32;
+ pfctlinput2(PRC_MSGSIZE, SA(&ro_pmtu->ro_dst), (void *)&ip6cp);
+ return EMSGSIZE;
+ }
+
+ /*
+ * transmit packet without fragmentation
+ */
+ if (dontfrag || (!alwaysfrag && /* case 1-a and 2-a */
+ (tlen <= mtu || TSO_IPV6_OK(ifp, m) ||
+ (ifp->if_hwassist & CSUM_FRAGMENT_IPV6)))) {
+ /*
+ * mppn not updated in this case because no new chain is formed
+ * and inserted
+ */
+ ip6_output_checksum(ifp, mtu, m, nxt0, tlen, optlen);
+ } else {
/*
- * note that path MTU is never less than IPV6_MMTU
- * (see icmp6_input).
+ * time to fragment - cases 1-b and 3 are handled inside
+ * ip6_do_fragmentation().
+ * mppn is passed down to be updated to point at fragment chain.
*/
- error = EMSGSIZE;
+ error = ip6_do_fragmentation(mptr, optlen, ifp,
+ unfragpartlen, mtod(m, struct ip6_hdr *), exthdrsp, mtu, nxt0);
+ }
+
+ return error;
+}
+
+/*
+ * ip6_do_fragmentation() is called by ip6_fragment_packet() after determining
+ * the packet needs to be fragmented. on success, morig is freed and a chain
+ * of fragments is linked into the packet chain where morig existed. Otherwise,
+ * an errno is returned.
+ */
+int
+ip6_do_fragmentation(struct mbuf **mptr, uint32_t optlen, struct ifnet *ifp,
+ uint32_t unfragpartlen, struct ip6_hdr *ip6, struct ip6_exthdrs *exthdrsp,
+ uint32_t mtu, int nxt0)
+{
+ VERIFY(NULL != mptr);
+ int error = 0;
+
+ struct mbuf *morig = *mptr;
+ struct mbuf *first_mbufp = NULL;
+ struct mbuf *last_mbufp = NULL;
+
+ size_t tlen = morig->m_pkthdr.len;
+
+ /*
+ * try to fragment the packet. case 1-b and 3
+ */
+ if ((morig->m_pkthdr.csum_flags & CSUM_TSO_IPV6)) {
+ /* TSO and fragment aren't compatible */
in6_ifstat_inc(ifp, ifs6_out_fragfail);
- goto bad;
- } else if (ip6->ip6_plen == 0) { /* jumbo payload cannot be fragmented */
- error = EMSGSIZE;
+ return EMSGSIZE;
+ } else if (mtu < IPV6_MMTU) {
+ /* path MTU cannot be less than IPV6_MMTU */
in6_ifstat_inc(ifp, ifs6_out_fragfail);
- goto bad;
+ return EMSGSIZE;
+ } else if (ip6->ip6_plen == 0) {
+ /* jumbo payload cannot be fragmented */
+ in6_ifstat_inc(ifp, ifs6_out_fragfail);
+ return EMSGSIZE;
} else {
- struct mbuf **mnext, *m_frgpart;
+ size_t hlen, len, off;
+ struct mbuf **mnext = NULL;
struct ip6_frag *ip6f;
- u_int32_t id = htonl(ip6_id++);
+ u_int32_t id = htonl(ip6_randomid());
u_char nextproto;
/*
if (mtu > IPV6_MAXPACKET)
mtu = IPV6_MAXPACKET;
- len = (mtu - hlen - sizeof(struct ip6_frag)) & ~7;
+ len = (mtu - hlen - sizeof (struct ip6_frag)) & ~7;
if (len < 8) {
- error = EMSGSIZE;
in6_ifstat_inc(ifp, ifs6_out_fragfail);
- goto bad;
+ return EMSGSIZE;
}
- mnext = &m->m_nextpkt;
-
/*
* Change the next header field of the last header in the
* unfragmentable part.
*/
- if (exthdrs.ip6e_rthdr) {
- nextproto = *mtod(exthdrs.ip6e_rthdr, u_char *);
- *mtod(exthdrs.ip6e_rthdr, u_char *) = IPPROTO_FRAGMENT;
- } else if (exthdrs.ip6e_dest1) {
- nextproto = *mtod(exthdrs.ip6e_dest1, u_char *);
- *mtod(exthdrs.ip6e_dest1, u_char *) = IPPROTO_FRAGMENT;
- } else if (exthdrs.ip6e_hbh) {
- nextproto = *mtod(exthdrs.ip6e_hbh, u_char *);
- *mtod(exthdrs.ip6e_hbh, u_char *) = IPPROTO_FRAGMENT;
+ if (exthdrsp->ip6e_rthdr != NULL) {
+ nextproto = *mtod(exthdrsp->ip6e_rthdr, u_char *);
+ *mtod(exthdrsp->ip6e_rthdr, u_char *) = IPPROTO_FRAGMENT;
+ } else if (exthdrsp->ip6e_dest1 != NULL) {
+ nextproto = *mtod(exthdrsp->ip6e_dest1, u_char *);
+ *mtod(exthdrsp->ip6e_dest1, u_char *) = IPPROTO_FRAGMENT;
+ } else if (exthdrsp->ip6e_hbh != NULL) {
+ nextproto = *mtod(exthdrsp->ip6e_hbh, u_char *);
+ *mtod(exthdrsp->ip6e_hbh, u_char *) = IPPROTO_FRAGMENT;
} else {
nextproto = ip6->ip6_nxt;
ip6->ip6_nxt = IPPROTO_FRAGMENT;
}
+ if (morig->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA)
+ in6_delayed_cksum_offset(morig, 0, optlen, nxt0);
+
/*
* Loop through length of segment after first fragment,
* make new header and copy data of each part and link onto
* chain.
*/
- m0 = m;
for (off = hlen; off < tlen; off += len) {
- MGETHDR(m, M_DONTWAIT, MT_HEADER);
- if (!m) {
+ struct ip6_hdr *new_mhip6;
+ struct mbuf *new_m;
+ struct mbuf *m_frgpart;
+
+ MGETHDR(new_m, M_DONTWAIT, MT_HEADER); /* MAC-OK */
+ if (new_m == NULL) {
error = ENOBUFS;
ip6stat.ip6s_odropped++;
- goto sendorfree;
+ break;
+ }
+ new_m->m_pkthdr.rcvif = NULL;
+ new_m->m_flags = morig->m_flags & M_COPYFLAGS;
+
+ if (first_mbufp != NULL) {
+ /* Every pass through loop but first */
+ *mnext = new_m;
+ last_mbufp = new_m;
+ } else {
+ /* This is the first element of the fragment chain */
+ first_mbufp = new_m;
+ last_mbufp = new_m;
}
- m->m_pkthdr.rcvif = NULL;
- m->m_flags = m0->m_flags & M_COPYFLAGS;
- *mnext = m;
- mnext = &m->m_nextpkt;
- m->m_data += max_linkhdr;
- mhip6 = mtod(m, struct ip6_hdr *);
- *mhip6 = *ip6;
- m->m_len = sizeof(*mhip6);
- error = ip6_insertfraghdr(m0, m, hlen, &ip6f);
- if (error) {
+ mnext = &new_m->m_nextpkt;
+
+ new_m->m_data += max_linkhdr;
+ new_mhip6 = mtod(new_m, struct ip6_hdr *);
+ *new_mhip6 = *ip6;
+ new_m->m_len = sizeof (*new_mhip6);
+
+ error = ip6_insertfraghdr(morig, new_m, hlen, &ip6f);
+ if (error) {
ip6stat.ip6s_odropped++;
- goto sendorfree;
+ break;
}
+
ip6f->ip6f_offlg = htons((u_short)((off - hlen) & ~7));
if (off + len >= tlen)
len = tlen - off;
else
ip6f->ip6f_offlg |= IP6F_MORE_FRAG;
- mhip6->ip6_plen = htons((u_short)(len + hlen +
- sizeof(*ip6f) -
- sizeof(struct ip6_hdr)));
- if ((m_frgpart = m_copy(m0, off, len)) == 0) {
+ new_mhip6->ip6_plen = htons((u_short)(len + hlen +
+ sizeof (*ip6f) - sizeof (struct ip6_hdr)));
+
+ if ((m_frgpart = m_copy(morig, off, len)) == NULL) {
error = ENOBUFS;
ip6stat.ip6s_odropped++;
- goto sendorfree;
+ break;
}
- m_cat(m, m_frgpart);
- m->m_pkthdr.len = len + hlen + sizeof(*ip6f);
- m->m_pkthdr.rcvif = 0;
- m->m_pkthdr.socket_id = m0->m_pkthdr.socket_id;
+ m_cat(new_m, m_frgpart);
+ new_m->m_pkthdr.len = len + hlen + sizeof (*ip6f);
+ new_m->m_pkthdr.rcvif = NULL;
+
+ M_COPY_CLASSIFIER(new_m, morig);
+ M_COPY_PFTAG(new_m, morig);
+
+#ifdef notyet
+#if CONFIG_MACF_NET
+ mac_create_fragment(morig, new_m);
+#endif /* CONFIG_MACF_NET */
+#endif /* notyet */
+
ip6f->ip6f_reserved = 0;
ip6f->ip6f_ident = id;
ip6f->ip6f_nxt = nextproto;
in6_ifstat_inc(ifp, ifs6_out_fragcreat);
}
- in6_ifstat_inc(ifp, ifs6_out_fragok);
+ if (error) {
+ /* free all the fragments created */
+ if (first_mbufp != NULL) {
+ m_freem_list(first_mbufp);
+ first_mbufp = NULL;
+ }
+ last_mbufp = NULL;
+ } else {
+ /* successful fragmenting */
+ m_freem(morig);
+ *mptr = first_mbufp;
+ last_mbufp->m_nextpkt = NULL;
+ ip6stat.ip6s_fragmented++;
+ in6_ifstat_inc(ifp, ifs6_out_fragok);
+ }
}
+ return error;
+}
- /*
- * Remove leading garbages.
- */
-sendorfree:
- m = m0->m_nextpkt;
- m0->m_nextpkt = 0;
- m_freem(m0);
- for (m0 = m; m; m = m0) {
- m0 = m->m_nextpkt;
- m->m_nextpkt = 0;
- if (error == 0) {
- /* Record statistics for this interface address. */
- if (ia) {
-#ifndef __APPLE__
- ia->ia_ifa.if_opackets++;
- ia->ia_ifa.if_obytes += m->m_pkthdr.len;
-#endif
- }
-#if IPSEC
- /* clean ipsec history once it goes out of the node */
- ipsec_delaux(m);
-#endif
- error = nd6_output(ifp, origifp, m, dst, ro->ro_rt, 1);
+static int
+ip6_copyexthdr(struct mbuf **mp, caddr_t hdr, int hlen)
+{
+ struct mbuf *m;
- } else
- m_freem(m);
- }
+ if (hlen > MCLBYTES)
+ return (ENOBUFS); /* XXX */
- if (error == 0)
- ip6stat.ip6s_fragmented++;
+ MGET(m, M_DONTWAIT, MT_DATA);
+ if (m == NULL)
+ return (ENOBUFS);
-done:
- if (!locked)
- lck_mtx_unlock(ip6_mutex);
- if (ro == &ip6route && ro->ro_rt) { /* brace necessary for rtfree */
- rtfree(ro->ro_rt);
- } else if (ro_pmtu == &ip6route && ro_pmtu->ro_rt) {
- rtfree(ro_pmtu->ro_rt);
- }
-
-#if IPSEC
- if (sp != NULL) {
- lck_mtx_lock(sadb_mutex);
- key_freesp(sp);
- lck_mtx_unlock(sadb_mutex);
+ if (hlen > MLEN) {
+ MCLGET(m, M_DONTWAIT);
+ if (!(m->m_flags & M_EXT)) {
+ m_free(m);
+ return (ENOBUFS);
+ }
}
-#endif /* IPSEC */
+ m->m_len = hlen;
+ if (hdr != NULL)
+ bcopy(hdr, mtod(m, caddr_t), hlen);
- return(error);
+ *mp = m;
+ return (0);
+}
-freehdrs:
- m_freem(exthdrs.ip6e_hbh); /* m_freem will check if mbuf is 0 */
- m_freem(exthdrs.ip6e_dest1);
- m_freem(exthdrs.ip6e_rthdr);
- m_freem(exthdrs.ip6e_dest2);
- /* fall through */
-bad:
- m_freem(m);
- goto done;
+static void
+ip6_out_cksum_stats(int proto, u_int32_t len)
+{
+ switch (proto) {
+ case IPPROTO_TCP:
+ tcp_out6_cksum_stats(len);
+ break;
+ case IPPROTO_UDP:
+ udp_out6_cksum_stats(len);
+ break;
+ default:
+ /* keep only TCP or UDP stats for now */
+ break;
+ }
}
-static int
-ip6_copyexthdr(mp, hdr, hlen)
- struct mbuf **mp;
- caddr_t hdr;
- int hlen;
+/*
+ * Process a delayed payload checksum calculation (outbound path.)
+ *
+ * hoff is the number of bytes beyond the mbuf data pointer which
+ * points to the IPv6 header. optlen is the number of bytes, if any,
+ * between the end of IPv6 header and the beginning of the ULP payload
+ * header, which represents the extension headers. If optlen is less
+ * than zero, this routine will bail when it detects extension headers.
+ *
+ * Returns a bitmask representing all the work done in software.
+ */
+uint32_t
+in6_finalize_cksum(struct mbuf *m, uint32_t hoff, int32_t optlen,
+ int32_t nxt0, uint32_t csum_flags)
{
- struct mbuf *m;
+ unsigned char buf[sizeof (struct ip6_hdr)] __attribute__((aligned(8)));
+ struct ip6_hdr *ip6;
+ uint32_t offset, mlen, hlen, olen, sw_csum;
+ uint16_t csum, ulpoff, plen;
+ uint8_t nxt;
- if (hlen > MCLBYTES)
- return(ENOBUFS); /* XXX */
+ _CASSERT(sizeof (csum) == sizeof (uint16_t));
+ VERIFY(m->m_flags & M_PKTHDR);
- MGET(m, M_DONTWAIT, MT_DATA);
- if (!m)
- return(ENOBUFS);
+ sw_csum = (csum_flags & m->m_pkthdr.csum_flags);
- if (hlen > MLEN) {
- MCLGET(m, M_DONTWAIT);
- if ((m->m_flags & M_EXT) == 0) {
- m_free(m);
- return(ENOBUFS);
+ if ((sw_csum &= CSUM_DELAY_IPV6_DATA) == 0)
+ goto done;
+
+ mlen = m->m_pkthdr.len; /* total mbuf len */
+ hlen = sizeof (*ip6); /* IPv6 header len */
+
+ /* sanity check (need at least IPv6 header) */
+ if (mlen < (hoff + hlen)) {
+ panic("%s: mbuf %p pkt len (%u) < hoff+ip6_hdr "
+ "(%u+%u)\n", __func__, m, mlen, hoff, hlen);
+ /* NOTREACHED */
+ }
+
+ /*
+ * In case the IPv6 header is not contiguous, or not 32-bit
+ * aligned, copy it to a local buffer.
+ */
+ if ((hoff + hlen) > m->m_len ||
+ !IP6_HDR_ALIGNED_P(mtod(m, caddr_t) + hoff)) {
+ m_copydata(m, hoff, hlen, (caddr_t)buf);
+ ip6 = (struct ip6_hdr *)(void *)buf;
+ } else {
+ ip6 = (struct ip6_hdr *)(void *)(m->m_data + hoff);
+ }
+
+ nxt = ip6->ip6_nxt;
+ plen = ntohs(ip6->ip6_plen);
+ if (plen != (mlen - (hoff + hlen))) {
+ plen = OSSwapInt16(plen);
+ if (plen != (mlen - (hoff + hlen))) {
+ /* Don't complain for jumbograms */
+ if (plen != 0 || nxt != IPPROTO_HOPOPTS) {
+ printf("%s: mbuf 0x%llx proto %d IPv6 "
+ "plen %d (%x) [swapped %d (%x)] doesn't "
+ "match actual packet length; %d is used "
+ "instead\n", __func__,
+ (uint64_t)VM_KERNEL_ADDRPERM(m), nxt,
+ ip6->ip6_plen, ip6->ip6_plen, plen, plen,
+ (mlen - (hoff + hlen)));
+ }
+ plen = mlen - (hoff + hlen);
}
}
- m->m_len = hlen;
- if (hdr)
- bcopy(hdr, mtod(m, caddr_t), hlen);
- *mp = m;
- return(0);
+ if (optlen < 0) {
+ /* next header isn't TCP/UDP and we don't know optlen, bail */
+ if (nxt != IPPROTO_TCP && nxt != IPPROTO_UDP) {
+ sw_csum = 0;
+ goto done;
+ }
+ olen = 0;
+ } else {
+ /* caller supplied the original transport number; use it */
+ if (nxt0 >= 0)
+ nxt = nxt0;
+ olen = optlen;
+ }
+
+ offset = hoff + hlen + olen; /* ULP header */
+
+ /* sanity check */
+ if (mlen < offset) {
+ panic("%s: mbuf %p pkt len (%u) < hoff+ip6_hdr+ext_hdr "
+ "(%u+%u+%u)\n", __func__, m, mlen, hoff, hlen, olen);
+ /* NOTREACHED */
+ }
+
+ /*
+ * offset is added to the lower 16-bit value of csum_data,
+ * which is expected to contain the ULP offset; therefore
+ * CSUM_PARTIAL offset adjustment must be undone.
+ */
+ if ((m->m_pkthdr.csum_flags & (CSUM_PARTIAL|CSUM_DATA_VALID)) ==
+ (CSUM_PARTIAL|CSUM_DATA_VALID)) {
+ /*
+ * Get back the original ULP offset (this will
+ * undo the CSUM_PARTIAL logic in ip6_output.)
+ */
+ m->m_pkthdr.csum_data = (m->m_pkthdr.csum_tx_stuff -
+ m->m_pkthdr.csum_tx_start);
+ }
+
+ ulpoff = (m->m_pkthdr.csum_data & 0xffff); /* ULP csum offset */
+
+ if (mlen < (ulpoff + sizeof (csum))) {
+ panic("%s: mbuf %p pkt len (%u) proto %d invalid ULP "
+ "cksum offset (%u) cksum flags 0x%x\n", __func__,
+ m, mlen, nxt, ulpoff, m->m_pkthdr.csum_flags);
+ /* NOTREACHED */
+ }
+
+ csum = inet6_cksum(m, 0, offset, plen - olen);
+
+ /* Update stats */
+ ip6_out_cksum_stats(nxt, plen - olen);
+
+ /* RFC1122 4.1.3.4 */
+ if (csum == 0 &&
+ (m->m_pkthdr.csum_flags & (CSUM_UDPIPV6|CSUM_ZERO_INVERT)))
+ csum = 0xffff;
+
+ /* Insert the checksum in the ULP csum field */
+ offset += ulpoff;
+ if ((offset + sizeof (csum)) > m->m_len) {
+ m_copyback(m, offset, sizeof (csum), &csum);
+ } else if (IP6_HDR_ALIGNED_P(mtod(m, char *) + hoff)) {
+ *(uint16_t *)(void *)(mtod(m, char *) + offset) = csum;
+ } else {
+ bcopy(&csum, (mtod(m, char *) + offset), sizeof (csum));
+ }
+ m->m_pkthdr.csum_flags &= ~(CSUM_DELAY_IPV6_DATA | CSUM_DATA_VALID |
+ CSUM_PARTIAL | CSUM_ZERO_INVERT);
+
+done:
+ return (sw_csum);
}
/*
* Insert jumbo payload option.
*/
static int
-ip6_insert_jumboopt(exthdrs, plen)
- struct ip6_exthdrs *exthdrs;
- u_int32_t plen;
+ip6_insert_jumboopt(struct ip6_exthdrs *exthdrs, u_int32_t plen)
{
struct mbuf *mopt;
u_char *optbuf;
u_int32_t v;
-#define JUMBOOPTLEN 8 /* length of jumbo payload option and padding */
+#define JUMBOOPTLEN 8 /* length of jumbo payload option and padding */
/*
* If there is no hop-by-hop options header, allocate new one.
* jumbo payload option, allocate a cluster to store the whole options.
* Otherwise, use it to store the options.
*/
- if (exthdrs->ip6e_hbh == 0) {
+ if (exthdrs->ip6e_hbh == NULL) {
MGET(mopt, M_DONTWAIT, MT_DATA);
- if (mopt == 0)
- return(ENOBUFS);
+ if (mopt == NULL)
+ return (ENOBUFS);
mopt->m_len = JUMBOOPTLEN;
optbuf = mtod(mopt, u_char *);
optbuf[1] = 0; /* = ((JUMBOOPTLEN) >> 3) - 1 */
* other than exthdrs.
* - exthdrs->ip6e_hbh is not an mbuf chain.
*/
- int oldoptlen = mopt->m_len;
+ u_int32_t oldoptlen = mopt->m_len;
struct mbuf *n;
/*
* not fit even in an mbuf cluster.
*/
if (oldoptlen + JUMBOOPTLEN > MCLBYTES)
- return(ENOBUFS);
+ return (ENOBUFS);
/*
* As a consequence, we must always prepare a cluster
* at this point.
*/
MGET(n, M_DONTWAIT, MT_DATA);
- if (n) {
+ if (n != NULL) {
MCLGET(n, M_DONTWAIT);
- if ((n->m_flags & M_EXT) == 0) {
+ if (!(n->m_flags & M_EXT)) {
m_freem(n);
n = NULL;
}
}
- if (!n)
- return(ENOBUFS);
+ if (n == NULL)
+ return (ENOBUFS);
n->m_len = oldoptlen + JUMBOOPTLEN;
bcopy(mtod(mopt, caddr_t), mtod(n, caddr_t),
- oldoptlen);
- optbuf = mtod(n, caddr_t) + oldoptlen;
+ oldoptlen);
+ optbuf = mtod(n, u_char *) + oldoptlen;
m_freem(mopt);
mopt = exthdrs->ip6e_hbh = n;
} else {
optbuf[2] = IP6OPT_JUMBO;
optbuf[3] = 4;
v = (u_int32_t)htonl(plen + JUMBOOPTLEN);
- bcopy(&v, &optbuf[4], sizeof(u_int32_t));
+ bcopy(&v, &optbuf[4], sizeof (u_int32_t));
/* finally, adjust the packet header length */
exthdrs->ip6e_ip6->m_pkthdr.len += JUMBOOPTLEN;
- return(0);
+ return (0);
#undef JUMBOOPTLEN
}
* Insert fragment header and copy unfragmentable header portions.
*/
static int
-ip6_insertfraghdr(m0, m, hlen, frghdrp)
- struct mbuf *m0, *m;
- int hlen;
- struct ip6_frag **frghdrp;
+ip6_insertfraghdr(struct mbuf *m0, struct mbuf *m, int hlen,
+ struct ip6_frag **frghdrp)
{
struct mbuf *n, *mlast;
- if (hlen > sizeof(struct ip6_hdr)) {
- n = m_copym(m0, sizeof(struct ip6_hdr),
- hlen - sizeof(struct ip6_hdr), M_DONTWAIT);
- if (n == 0)
- return(ENOBUFS);
+ if (hlen > sizeof (struct ip6_hdr)) {
+ n = m_copym(m0, sizeof (struct ip6_hdr),
+ hlen - sizeof (struct ip6_hdr), M_DONTWAIT);
+ if (n == NULL)
+ return (ENOBUFS);
m->m_next = n;
} else
n = m;
for (mlast = n; mlast->m_next; mlast = mlast->m_next)
;
- if ((mlast->m_flags & M_EXT) == 0 &&
- M_TRAILINGSPACE(mlast) >= sizeof(struct ip6_frag)) {
- /* use the trailing space of the last mbuf for the fragment hdr */
- *frghdrp =
- (struct ip6_frag *)(mtod(mlast, caddr_t) + mlast->m_len);
- mlast->m_len += sizeof(struct ip6_frag);
- m->m_pkthdr.len += sizeof(struct ip6_frag);
+ if (!(mlast->m_flags & M_EXT) &&
+ M_TRAILINGSPACE(mlast) >= sizeof (struct ip6_frag)) {
+ /* use the trailing space of the last mbuf for the frag hdr */
+ *frghdrp = (struct ip6_frag *)(mtod(mlast, caddr_t) +
+ mlast->m_len);
+ mlast->m_len += sizeof (struct ip6_frag);
+ m->m_pkthdr.len += sizeof (struct ip6_frag);
} else {
/* allocate a new mbuf for the fragment header */
struct mbuf *mfrg;
MGET(mfrg, M_DONTWAIT, MT_DATA);
- if (mfrg == 0)
- return(ENOBUFS);
- mfrg->m_len = sizeof(struct ip6_frag);
+ if (mfrg == NULL)
+ return (ENOBUFS);
+ mfrg->m_len = sizeof (struct ip6_frag);
*frghdrp = mtod(mfrg, struct ip6_frag *);
mlast->m_next = mfrg;
}
- return(0);
+ return (0);
}
-extern int load_ipfw();
+static int
+ip6_getpmtu(struct route_in6 *ro_pmtu, struct route_in6 *ro,
+ struct ifnet *ifp, struct in6_addr *dst, u_int32_t *mtup,
+ boolean_t *alwaysfragp)
+{
+ u_int32_t mtu = 0;
+ boolean_t alwaysfrag = FALSE;
+ int error = 0;
+ boolean_t is_local = FALSE;
+
+ if (IN6_IS_SCOPE_LINKLOCAL(dst))
+ is_local = TRUE;
+
+ if (ro_pmtu != ro) {
+ /* The first hop and the final destination may differ. */
+ struct sockaddr_in6 *sa6_dst = SIN6(&ro_pmtu->ro_dst);
+ if (ROUTE_UNUSABLE(ro_pmtu) ||
+ !IN6_ARE_ADDR_EQUAL(&sa6_dst->sin6_addr, dst))
+ ROUTE_RELEASE(ro_pmtu);
+
+ if (ro_pmtu->ro_rt == NULL) {
+ bzero(sa6_dst, sizeof (*sa6_dst));
+ sa6_dst->sin6_family = AF_INET6;
+ sa6_dst->sin6_len = sizeof (struct sockaddr_in6);
+ sa6_dst->sin6_addr = *dst;
+
+ rtalloc_scoped((struct route *)ro_pmtu,
+ ifp != NULL ? ifp->if_index : IFSCOPE_NONE);
+ }
+ }
+
+ if (ro_pmtu->ro_rt != NULL) {
+ u_int32_t ifmtu;
+
+ if (ifp == NULL)
+ ifp = ro_pmtu->ro_rt->rt_ifp;
+ /* Access without acquiring nd_ifinfo lock for performance */
+ ifmtu = IN6_LINKMTU(ifp);
+
+ /*
+ * Access rmx_mtu without holding the route entry lock,
+ * for performance; this isn't something that changes
+ * often, so optimize.
+ */
+ mtu = ro_pmtu->ro_rt->rt_rmx.rmx_mtu;
+ if (mtu > ifmtu || mtu == 0) {
+ /*
+ * The MTU on the route is larger than the MTU on
+ * the interface! This shouldn't happen, unless the
+ * MTU of the interface has been changed after the
+ * interface was brought up. Change the MTU in the
+ * route to match the interface MTU (as long as the
+ * field isn't locked).
+ *
+ * if MTU on the route is 0, we need to fix the MTU.
+ * this case happens with path MTU discovery timeouts.
+ */
+ mtu = ifmtu;
+ if (!(ro_pmtu->ro_rt->rt_rmx.rmx_locks & RTV_MTU))
+ ro_pmtu->ro_rt->rt_rmx.rmx_mtu = mtu; /* XXX */
+ } else if (mtu < IPV6_MMTU) {
+ /*
+ * RFC2460 section 5, last paragraph:
+ * if we record ICMPv6 too big message with
+ * mtu < IPV6_MMTU, transmit packets sized IPV6_MMTU
+ * or smaller, with framgent header attached.
+ * (fragment header is needed regardless from the
+ * packet size, for translators to identify packets)
+ */
+ alwaysfrag = TRUE;
+ mtu = IPV6_MMTU;
+ }
+ } else {
+ if (ifp) {
+ /* Don't hold nd_ifinfo lock for performance */
+ mtu = IN6_LINKMTU(ifp);
+ } else {
+ error = EHOSTUNREACH; /* XXX */
+ }
+ }
+
+ *mtup = mtu;
+ if ((alwaysfragp != NULL) && !is_local)
+ *alwaysfragp = alwaysfrag;
+ return (error);
+}
/*
* IP6 socket option processing.
*/
int
-ip6_ctloutput(so, sopt)
- struct socket *so;
- struct sockopt *sopt;
+ip6_ctloutput(struct socket *so, struct sockopt *sopt)
{
+ int optdatalen, uproto;
+ void *optdata;
int privileged;
struct inpcb *in6p = sotoinpcb(so);
- int error, optval;
- int level, op, optname;
- int optlen;
+ int error = 0, optval = 0;
+ int level, op = -1, optname = 0;
+ int optlen = 0;
struct proc *p;
- level = error = optval = 0;
- if (sopt == NULL)
- panic("ip6_ctloutput: arg soopt is NULL");
- else {
- level = sopt->sopt_level;
- op = sopt->sopt_dir;
- optname = sopt->sopt_name;
- optlen = sopt->sopt_valsize;
- p = sopt->sopt_p;
- }
+ VERIFY(sopt != NULL);
+
+ level = sopt->sopt_level;
+ op = sopt->sopt_dir;
+ optname = sopt->sopt_name;
+ optlen = sopt->sopt_valsize;
+ p = sopt->sopt_p;
+ uproto = (int)SOCK_PROTO(so);
- privileged = (p == 0 || proc_suser(p)) ? 0 : 1;
+ privileged = (proc_suser(p) == 0);
if (level == IPPROTO_IPV6) {
+ boolean_t capture_exthdrstat_in = FALSE;
switch (op) {
-
case SOPT_SET:
switch (optname) {
- case IPV6_PKTOPTIONS:
- {
+ case IPV6_2292PKTOPTIONS: {
struct mbuf *m;
- if (sopt->sopt_valsize > MCLBYTES) {
- error = EMSGSIZE;
- break;
- }
- error = soopt_getm(sopt, &m); /* XXX */
- if (error != NULL)
+ error = soopt_getm(sopt, &m);
+ if (error != 0)
break;
- error = soopt_mcopyin(sopt, m); /* XXX */
- if (error != NULL)
+ error = soopt_mcopyin(sopt, m);
+ if (error != 0)
break;
error = ip6_pcbopts(&in6p->in6p_outputopts,
- m, so, sopt);
- m_freem(m); /* XXX */
+ m, so, sopt);
+ m_freem(m);
break;
}
* receiving ANY hbh/dst options in order to avoid
* overhead of parsing options in the kernel.
*/
+ case IPV6_RECVHOPOPTS:
+ case IPV6_RECVDSTOPTS:
+ case IPV6_RECVRTHDRDSTOPTS:
+ if (!privileged)
+ break;
+ /* FALLTHROUGH */
case IPV6_UNICAST_HOPS:
- case IPV6_CHECKSUM:
- case IPV6_FAITH:
-
+ case IPV6_HOPLIMIT:
+ case IPV6_RECVPKTINFO:
+ case IPV6_RECVHOPLIMIT:
+ case IPV6_RECVRTHDR:
+ case IPV6_RECVPATHMTU:
+ case IPV6_RECVTCLASS:
case IPV6_V6ONLY:
- if (optlen != sizeof(int)) {
+ case IPV6_AUTOFLOWLABEL:
+ if (optlen != sizeof (int)) {
error = EINVAL;
break;
}
error = sooptcopyin(sopt, &optval,
- sizeof optval, sizeof optval);
+ sizeof (optval), sizeof (optval));
if (error)
break;
- switch (optname) {
+ switch (optname) {
case IPV6_UNICAST_HOPS:
- if (optval < -1 || optval >= 256)
+ if (optval < -1 || optval >= 256) {
error = EINVAL;
- else {
+ } else {
/* -1 = kernel default */
in6p->in6p_hops = optval;
-
- if ((in6p->in6p_vflag &
- INP_IPV4) != 0)
- in6p->inp_ip_ttl = optval;
+ if (in6p->inp_vflag &
+ INP_IPV4) {
+ in6p->inp_ip_ttl =
+ optval;
+ }
}
break;
-#define OPTSET(bit) \
-do { \
- if (optval) \
- in6p->in6p_flags |= (bit); \
- else \
- in6p->in6p_flags &= ~(bit); \
+#define OPTSET(bit) do { \
+ if (optval) \
+ in6p->inp_flags |= (bit); \
+ else \
+ in6p->inp_flags &= ~(bit); \
+} while (0)
+
+#define OPTSET2292(bit) do { \
+ in6p->inp_flags |= IN6P_RFC2292; \
+ if (optval) \
+ in6p->inp_flags |= (bit); \
+ else \
+ in6p->inp_flags &= ~(bit); \
} while (0)
-#define OPTBIT(bit) (in6p->in6p_flags & (bit) ? 1 : 0)
- case IPV6_CHECKSUM:
- in6p->in6p_cksum = optval;
+#define OPTBIT(bit) (in6p->inp_flags & (bit) ? 1 : 0)
+
+ case IPV6_RECVPKTINFO:
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ OPTSET(IN6P_PKTINFO);
+ break;
+
+ case IPV6_HOPLIMIT: {
+ struct ip6_pktopts **optp;
+
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ optp = &in6p->in6p_outputopts;
+ error = ip6_pcbopt(IPV6_HOPLIMIT,
+ (u_char *)&optval, sizeof (optval),
+ optp, uproto);
+ break;
+ }
+
+ case IPV6_RECVHOPLIMIT:
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ OPTSET(IN6P_HOPLIMIT);
+ break;
+
+ case IPV6_RECVHOPOPTS:
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ OPTSET(IN6P_HOPOPTS);
+ capture_exthdrstat_in = TRUE;
+ break;
+
+ case IPV6_RECVDSTOPTS:
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ OPTSET(IN6P_DSTOPTS);
+ capture_exthdrstat_in = TRUE;
+ break;
+
+ case IPV6_RECVRTHDRDSTOPTS:
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ OPTSET(IN6P_RTHDRDSTOPTS);
+ capture_exthdrstat_in = TRUE;
+ break;
+
+ case IPV6_RECVRTHDR:
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ OPTSET(IN6P_RTHDR);
+ capture_exthdrstat_in = TRUE;
break;
- case IPV6_FAITH:
- OPTSET(IN6P_FAITH);
+ case IPV6_RECVPATHMTU:
+ /*
+ * We ignore this option for TCP
+ * sockets.
+ * (RFC3542 leaves this case
+ * unspecified.)
+ */
+ if (uproto != IPPROTO_TCP)
+ OPTSET(IN6P_MTU);
break;
case IPV6_V6ONLY:
* available only prior to bind(2).
* see ipng mailing list, Jun 22 2001.
*/
- if (in6p->in6p_lport ||
- !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
- {
+ if (in6p->inp_lport ||
+ !IN6_IS_ADDR_UNSPECIFIED(
+ &in6p->in6p_laddr)) {
error = EINVAL;
break;
}
OPTSET(IN6P_IPV6_V6ONLY);
if (optval)
- in6p->in6p_vflag &= ~INP_IPV4;
+ in6p->inp_vflag &= ~INP_IPV4;
else
- in6p->in6p_vflag |= INP_IPV4;
+ in6p->inp_vflag |= INP_IPV4;
+ break;
+
+ case IPV6_RECVTCLASS:
+ /* we can mix with RFC2292 */
+ OPTSET(IN6P_TCLASS);
+ break;
+
+ case IPV6_AUTOFLOWLABEL:
+ OPTSET(IN6P_AUTOFLOWLABEL);
break;
+
}
break;
- case IPV6_PKTINFO:
- case IPV6_HOPLIMIT:
- case IPV6_HOPOPTS:
- case IPV6_DSTOPTS:
- case IPV6_RTHDR:
+ case IPV6_TCLASS:
+ case IPV6_DONTFRAG:
+ case IPV6_USE_MIN_MTU:
+ case IPV6_PREFER_TEMPADDR: {
+ struct ip6_pktopts **optp;
+
+ if (optlen != sizeof (optval)) {
+ error = EINVAL;
+ break;
+ }
+ error = sooptcopyin(sopt, &optval,
+ sizeof (optval), sizeof (optval));
+ if (error)
+ break;
+
+ optp = &in6p->in6p_outputopts;
+ error = ip6_pcbopt(optname, (u_char *)&optval,
+ sizeof (optval), optp, uproto);
+
+ if (optname == IPV6_TCLASS) {
+ // Add in the ECN flags
+ u_int8_t tos = (in6p->inp_ip_tos & ~IPTOS_ECN_MASK);
+ u_int8_t ecn = optval & IPTOS_ECN_MASK;
+ in6p->inp_ip_tos = tos | ecn;
+ }
+ break;
+ }
+
+ case IPV6_2292PKTINFO:
+ case IPV6_2292HOPLIMIT:
+ case IPV6_2292HOPOPTS:
+ case IPV6_2292DSTOPTS:
+ case IPV6_2292RTHDR:
/* RFC 2292 */
- if (optlen != sizeof(int)) {
+ if (optlen != sizeof (int)) {
error = EINVAL;
break;
}
error = sooptcopyin(sopt, &optval,
- sizeof optval, sizeof optval);
+ sizeof (optval), sizeof (optval));
if (error)
break;
switch (optname) {
- case IPV6_PKTINFO:
- OPTSET(IN6P_PKTINFO);
+ case IPV6_2292PKTINFO:
+ OPTSET2292(IN6P_PKTINFO);
break;
- case IPV6_HOPLIMIT:
- OPTSET(IN6P_HOPLIMIT);
+ case IPV6_2292HOPLIMIT:
+ OPTSET2292(IN6P_HOPLIMIT);
break;
- case IPV6_HOPOPTS:
+ case IPV6_2292HOPOPTS:
/*
* Check super-user privilege.
* See comments for IPV6_RECVHOPOPTS.
*/
if (!privileged)
- return(EPERM);
- OPTSET(IN6P_HOPOPTS);
+ return (EPERM);
+ OPTSET2292(IN6P_HOPOPTS);
+ capture_exthdrstat_in = TRUE;
break;
- case IPV6_DSTOPTS:
+ case IPV6_2292DSTOPTS:
if (!privileged)
- return(EPERM);
- OPTSET(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS); /* XXX */
+ return (EPERM);
+ OPTSET2292(IN6P_DSTOPTS|
+ IN6P_RTHDRDSTOPTS); /* XXX */
+ capture_exthdrstat_in = TRUE;
break;
- case IPV6_RTHDR:
- OPTSET(IN6P_RTHDR);
+ case IPV6_2292RTHDR:
+ OPTSET2292(IN6P_RTHDR);
+ capture_exthdrstat_in = TRUE;
break;
}
break;
-#undef OPTSET
+ case IPV6_3542PKTINFO:
+ case IPV6_3542HOPOPTS:
+ case IPV6_3542RTHDR:
+ case IPV6_3542DSTOPTS:
+ case IPV6_RTHDRDSTOPTS:
+ case IPV6_3542NEXTHOP: {
+ struct ip6_pktopts **optp;
+ /* new advanced API (RFC3542) */
+ struct mbuf *m;
+
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ error = soopt_getm(sopt, &m);
+ if (error != 0)
+ break;
+ error = soopt_mcopyin(sopt, m);
+ if (error != 0)
+ break;
+
+ optp = &in6p->in6p_outputopts;
+ error = ip6_pcbopt(optname, mtod(m, u_char *),
+ m->m_len, optp, uproto);
+ m_freem(m);
+ break;
+ }
+#undef OPTSET
case IPV6_MULTICAST_IF:
case IPV6_MULTICAST_HOPS:
case IPV6_MULTICAST_LOOP:
case IPV6_JOIN_GROUP:
case IPV6_LEAVE_GROUP:
- {
- struct mbuf *m;
- if (sopt->sopt_valsize > MLEN) {
- error = EMSGSIZE;
- break;
- }
- /* XXX */
- MGET(m, sopt->sopt_p ? M_WAIT : M_DONTWAIT, MT_HEADER);
- if (m == 0) {
- error = ENOBUFS;
- break;
- }
- m->m_len = sopt->sopt_valsize;
- error = sooptcopyin(sopt, mtod(m, char *),
- m->m_len, m->m_len);
- error = ip6_setmoptions(sopt->sopt_name, in6p, m);
- (void)m_free(m);
- }
+ case IPV6_MSFILTER:
+ case MCAST_BLOCK_SOURCE:
+ case MCAST_UNBLOCK_SOURCE:
+ case MCAST_JOIN_GROUP:
+ case MCAST_LEAVE_GROUP:
+ case MCAST_JOIN_SOURCE_GROUP:
+ case MCAST_LEAVE_SOURCE_GROUP:
+ error = ip6_setmoptions(in6p, sopt);
break;
case IPV6_PORTRANGE:
error = sooptcopyin(sopt, &optval,
- sizeof optval, sizeof optval);
+ sizeof (optval), sizeof (optval));
if (error)
break;
switch (optval) {
case IPV6_PORTRANGE_DEFAULT:
- in6p->in6p_flags &= ~(IN6P_LOWPORT);
- in6p->in6p_flags &= ~(IN6P_HIGHPORT);
+ in6p->inp_flags &= ~(INP_LOWPORT);
+ in6p->inp_flags &= ~(INP_HIGHPORT);
break;
case IPV6_PORTRANGE_HIGH:
- in6p->in6p_flags &= ~(IN6P_LOWPORT);
- in6p->in6p_flags |= IN6P_HIGHPORT;
+ in6p->inp_flags &= ~(INP_LOWPORT);
+ in6p->inp_flags |= INP_HIGHPORT;
break;
case IPV6_PORTRANGE_LOW:
- in6p->in6p_flags &= ~(IN6P_HIGHPORT);
- in6p->in6p_flags |= IN6P_LOWPORT;
+ in6p->inp_flags &= ~(INP_HIGHPORT);
+ in6p->inp_flags |= INP_LOWPORT;
break;
default:
break;
}
break;
-
#if IPSEC
- case IPV6_IPSEC_POLICY:
- {
+ case IPV6_IPSEC_POLICY: {
caddr_t req = NULL;
size_t len = 0;
struct mbuf *m;
- if (sopt->sopt_valsize > MCLBYTES) {
- error = EMSGSIZE;
- break;
- }
- if ((error = soopt_getm(sopt, &m)) != 0) /* XXX */
+ if ((error = soopt_getm(sopt, &m)) != 0)
break;
- if ((error = soopt_mcopyin(sopt, m)) != 0) /* XXX */
+ if ((error = soopt_mcopyin(sopt, m)) != 0)
break;
- if (m) {
- req = mtod(m, caddr_t);
- len = m->m_len;
- }
- lck_mtx_lock(sadb_mutex);
+
+ req = mtod(m, caddr_t);
+ len = m->m_len;
error = ipsec6_set_policy(in6p, optname, req,
- len, privileged);
- lck_mtx_unlock(sadb_mutex);
+ len, privileged);
m_freem(m);
- }
break;
-#endif /* KAME IPSEC */
+ }
+#endif /* IPSEC */
+ /*
+ * IPv6 variant of IP_BOUND_IF; for details see
+ * comments on IP_BOUND_IF in ip_ctloutput().
+ */
+ case IPV6_BOUND_IF:
+ /* This option is settable only on IPv6 */
+ if (!(in6p->inp_vflag & INP_IPV6)) {
+ error = EINVAL;
+ break;
+ }
+
+ error = sooptcopyin(sopt, &optval,
+ sizeof (optval), sizeof (optval));
+
+ if (error)
+ break;
+
+ error = inp_bindif(in6p, optval, NULL);
+ break;
+
+ case IPV6_NO_IFT_CELLULAR:
+ /* This option is settable only for IPv6 */
+ if (!(in6p->inp_vflag & INP_IPV6)) {
+ error = EINVAL;
+ break;
+ }
+
+ error = sooptcopyin(sopt, &optval,
+ sizeof (optval), sizeof (optval));
- case IPV6_FW_ADD:
- case IPV6_FW_DEL:
- case IPV6_FW_FLUSH:
- case IPV6_FW_ZERO:
- {
- if (ip6_fw_ctl_ptr == NULL && load_ipfw() != 0)
- return EINVAL;
+ if (error)
+ break;
- error = (*ip6_fw_ctl_ptr)(sopt);
+ /* once set, it cannot be unset */
+ if (!optval && INP_NO_CELLULAR(in6p)) {
+ error = EINVAL;
+ break;
}
+
+ error = so_set_restrictions(so,
+ SO_RESTRICT_DENY_CELLULAR);
+ break;
+
+ case IPV6_OUT_IF:
+ /* This option is not settable */
+ error = EINVAL;
break;
default:
error = ENOPROTOOPT;
break;
}
+ if (capture_exthdrstat_in) {
+ if (uproto == IPPROTO_TCP) {
+ INC_ATOMIC_INT64_LIM(net_api_stats.nas_sock_inet6_stream_exthdr_in);
+ } else if (uproto == IPPROTO_UDP) {
+ INC_ATOMIC_INT64_LIM(net_api_stats.nas_sock_inet6_dgram_exthdr_in);
+ }
+ }
break;
case SOPT_GET:
switch (optname) {
- case IPV6_PKTOPTIONS:
- if (in6p->in6p_options) {
- struct mbuf *m;
- m = m_copym(in6p->in6p_options,
- 0, M_COPYALL, M_WAIT);
- error = soopt_mcopyout(sopt, m);
- if (error == 0)
- m_freem(m);
- } else
- sopt->sopt_valsize = 0;
+ case IPV6_2292PKTOPTIONS:
+ /*
+ * RFC3542 (effectively) deprecated the
+ * semantics of the 2292-style pktoptions.
+ * Since it was not reliable in nature (i.e.,
+ * applications had to expect the lack of some
+ * information after all), it would make sense
+ * to simplify this part by always returning
+ * empty data.
+ */
+ sopt->sopt_valsize = 0;
break;
+ case IPV6_RECVHOPOPTS:
+ case IPV6_RECVDSTOPTS:
+ case IPV6_RECVRTHDRDSTOPTS:
case IPV6_UNICAST_HOPS:
- case IPV6_CHECKSUM:
-
- case IPV6_FAITH:
+ case IPV6_RECVPKTINFO:
+ case IPV6_RECVHOPLIMIT:
+ case IPV6_RECVRTHDR:
+ case IPV6_RECVPATHMTU:
case IPV6_V6ONLY:
case IPV6_PORTRANGE:
+ case IPV6_RECVTCLASS:
+ case IPV6_AUTOFLOWLABEL:
switch (optname) {
+ case IPV6_RECVHOPOPTS:
+ optval = OPTBIT(IN6P_HOPOPTS);
+ break;
+
+ case IPV6_RECVDSTOPTS:
+ optval = OPTBIT(IN6P_DSTOPTS);
+ break;
+
+ case IPV6_RECVRTHDRDSTOPTS:
+ optval = OPTBIT(IN6P_RTHDRDSTOPTS);
+ break;
+
case IPV6_UNICAST_HOPS:
optval = in6p->in6p_hops;
break;
- case IPV6_CHECKSUM:
- optval = in6p->in6p_cksum;
+ case IPV6_RECVPKTINFO:
+ optval = OPTBIT(IN6P_PKTINFO);
break;
- case IPV6_FAITH:
- optval = OPTBIT(IN6P_FAITH);
+ case IPV6_RECVHOPLIMIT:
+ optval = OPTBIT(IN6P_HOPLIMIT);
break;
- case IPV6_V6ONLY:
- optval = OPTBIT(IN6P_IPV6_V6ONLY);
+ case IPV6_RECVRTHDR:
+ optval = OPTBIT(IN6P_RTHDR);
break;
- case IPV6_PORTRANGE:
- {
- int flags;
- flags = in6p->in6p_flags;
- if (flags & IN6P_HIGHPORT)
+ case IPV6_RECVPATHMTU:
+ optval = OPTBIT(IN6P_MTU);
+ break;
+
+ case IPV6_V6ONLY:
+ optval = OPTBIT(IN6P_IPV6_V6ONLY);
+ break;
+
+ case IPV6_PORTRANGE: {
+ int flags;
+ flags = in6p->inp_flags;
+ if (flags & INP_HIGHPORT)
optval = IPV6_PORTRANGE_HIGH;
- else if (flags & IN6P_LOWPORT)
+ else if (flags & INP_LOWPORT)
optval = IPV6_PORTRANGE_LOW;
else
optval = 0;
break;
- }
}
+ case IPV6_RECVTCLASS:
+ optval = OPTBIT(IN6P_TCLASS);
+ break;
+
+ case IPV6_AUTOFLOWLABEL:
+ optval = OPTBIT(IN6P_AUTOFLOWLABEL);
+ break;
+ }
+ if (error)
+ break;
error = sooptcopyout(sopt, &optval,
- sizeof optval);
+ sizeof (optval));
break;
- case IPV6_PKTINFO:
- case IPV6_HOPLIMIT:
- case IPV6_HOPOPTS:
- case IPV6_RTHDR:
- case IPV6_DSTOPTS:
- if ((optname == IPV6_HOPOPTS ||
- optname == IPV6_DSTOPTS) &&
- !privileged)
- return(EPERM);
+ case IPV6_PATHMTU: {
+ u_int32_t pmtu = 0;
+ struct ip6_mtuinfo mtuinfo;
+ struct route_in6 sro;
+
+ bzero(&sro, sizeof (sro));
+
+ if (!(so->so_state & SS_ISCONNECTED))
+ return (ENOTCONN);
+ /*
+ * XXX: we dot not consider the case of source
+ * routing, or optional information to specify
+ * the outgoing interface.
+ */
+ error = ip6_getpmtu(&sro, NULL, NULL,
+ &in6p->in6p_faddr, &pmtu, NULL);
+ ROUTE_RELEASE(&sro);
+ if (error)
+ break;
+ if (pmtu > IPV6_MAXPACKET)
+ pmtu = IPV6_MAXPACKET;
+
+ bzero(&mtuinfo, sizeof (mtuinfo));
+ mtuinfo.ip6m_mtu = (u_int32_t)pmtu;
+ optdata = (void *)&mtuinfo;
+ optdatalen = sizeof (mtuinfo);
+ error = sooptcopyout(sopt, optdata,
+ optdatalen);
+ break;
+ }
+
+ case IPV6_2292PKTINFO:
+ case IPV6_2292HOPLIMIT:
+ case IPV6_2292HOPOPTS:
+ case IPV6_2292RTHDR:
+ case IPV6_2292DSTOPTS:
switch (optname) {
- case IPV6_PKTINFO:
+ case IPV6_2292PKTINFO:
optval = OPTBIT(IN6P_PKTINFO);
break;
- case IPV6_HOPLIMIT:
+ case IPV6_2292HOPLIMIT:
optval = OPTBIT(IN6P_HOPLIMIT);
break;
- case IPV6_HOPOPTS:
- if (!privileged)
- return(EPERM);
+ case IPV6_2292HOPOPTS:
optval = OPTBIT(IN6P_HOPOPTS);
break;
- case IPV6_RTHDR:
+ case IPV6_2292RTHDR:
optval = OPTBIT(IN6P_RTHDR);
break;
- case IPV6_DSTOPTS:
- if (!privileged)
- return(EPERM);
- optval = OPTBIT(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS);
+ case IPV6_2292DSTOPTS:
+ optval = OPTBIT(IN6P_DSTOPTS|
+ IN6P_RTHDRDSTOPTS);
break;
}
error = sooptcopyout(sopt, &optval,
- sizeof optval);
+ sizeof (optval));
+ break;
+
+ case IPV6_PKTINFO:
+ case IPV6_HOPOPTS:
+ case IPV6_RTHDR:
+ case IPV6_DSTOPTS:
+ case IPV6_RTHDRDSTOPTS:
+ case IPV6_NEXTHOP:
+ case IPV6_TCLASS:
+ case IPV6_DONTFRAG:
+ case IPV6_USE_MIN_MTU:
+ case IPV6_PREFER_TEMPADDR:
+ error = ip6_getpcbopt(in6p->in6p_outputopts,
+ optname, sopt);
break;
case IPV6_MULTICAST_IF:
case IPV6_MULTICAST_HOPS:
case IPV6_MULTICAST_LOOP:
- case IPV6_JOIN_GROUP:
- case IPV6_LEAVE_GROUP:
- {
- struct mbuf *m;
- error = ip6_getmoptions(sopt->sopt_name,
- in6p->in6p_moptions, &m);
- if (error == 0)
- error = sooptcopyout(sopt,
- mtod(m, char *), m->m_len);
- m_freem(m);
- }
+ case IPV6_MSFILTER:
+ error = ip6_getmoptions(in6p, sopt);
break;
-
#if IPSEC
- case IPV6_IPSEC_POLICY:
- {
- caddr_t req = NULL;
- size_t len = 0;
- struct mbuf *m = NULL;
- struct mbuf **mp = &m;
-
- if (sopt->sopt_valsize > MCLBYTES) {
- error = EMSGSIZE;
- break;
- }
- error = soopt_getm(sopt, &m); /* XXX */
- if (error != NULL)
- break;
- error = soopt_mcopyin(sopt, m); /* XXX */
- if (error != NULL)
- break;
- if (m) {
- req = mtod(m, caddr_t);
- len = m->m_len;
- }
- lck_mtx_lock(sadb_mutex);
- error = ipsec6_get_policy(in6p, req, len, mp);
- lck_mtx_unlock(sadb_mutex);
- if (error == 0)
- error = soopt_mcopyout(sopt, m); /*XXX*/
- if (error == 0 && m)
- m_freem(m);
+ case IPV6_IPSEC_POLICY: {
+ error = 0; /* This option is no longer supported */
+ break;
+ }
+#endif /* IPSEC */
+ case IPV6_BOUND_IF:
+ if (in6p->inp_flags & INP_BOUND_IF)
+ optval = in6p->inp_boundifp->if_index;
+ error = sooptcopyout(sopt, &optval,
+ sizeof (optval));
break;
- }
-#endif /* KAME IPSEC */
- case IPV6_FW_GET:
- {
- if (ip6_fw_ctl_ptr == NULL && load_ipfw() != 0)
- return EINVAL;
+ case IPV6_NO_IFT_CELLULAR:
+ optval = INP_NO_CELLULAR(in6p) ? 1 : 0;
+ error = sooptcopyout(sopt, &optval,
+ sizeof (optval));
+ break;
- error = (*ip6_fw_ctl_ptr)(sopt);
- }
+ case IPV6_OUT_IF:
+ optval = (in6p->in6p_last_outifp != NULL) ?
+ in6p->in6p_last_outifp->if_index : 0;
+ error = sooptcopyout(sopt, &optval,
+ sizeof (optval));
break;
default:
}
break;
}
+ } else if (level == IPPROTO_UDP) {
+ error = udp_ctloutput(so, sopt);
} else {
error = EINVAL;
}
- return(error);
+ return (error);
+}
+
+int
+ip6_raw_ctloutput(struct socket *so, struct sockopt *sopt)
+{
+ int error = 0, optval, optlen;
+ const int icmp6off = offsetof(struct icmp6_hdr, icmp6_cksum);
+ struct inpcb *in6p = sotoinpcb(so);
+ int level, op, optname;
+
+ level = sopt->sopt_level;
+ op = sopt->sopt_dir;
+ optname = sopt->sopt_name;
+ optlen = sopt->sopt_valsize;
+
+ if (level != IPPROTO_IPV6)
+ return (EINVAL);
+
+ switch (optname) {
+ case IPV6_CHECKSUM:
+ /*
+ * For ICMPv6 sockets, no modification allowed for checksum
+ * offset, permit "no change" values to help existing apps.
+ *
+ * RFC3542 says: "An attempt to set IPV6_CHECKSUM
+ * for an ICMPv6 socket will fail."
+ * The current behavior does not meet RFC3542.
+ */
+ switch (op) {
+ case SOPT_SET:
+ if (optlen != sizeof (int)) {
+ error = EINVAL;
+ break;
+ }
+ error = sooptcopyin(sopt, &optval, sizeof (optval),
+ sizeof (optval));
+ if (error)
+ break;
+ if ((optval % 2) != 0) {
+ /* the API assumes even offset values */
+ error = EINVAL;
+ } else if (SOCK_PROTO(so) == IPPROTO_ICMPV6) {
+ if (optval != icmp6off)
+ error = EINVAL;
+ } else {
+ in6p->in6p_cksum = optval;
+ }
+ break;
+
+ case SOPT_GET:
+ if (SOCK_PROTO(so) == IPPROTO_ICMPV6)
+ optval = icmp6off;
+ else
+ optval = in6p->in6p_cksum;
+
+ error = sooptcopyout(sopt, &optval, sizeof (optval));
+ break;
+
+ default:
+ error = EINVAL;
+ break;
+ }
+ break;
+
+ default:
+ error = ENOPROTOOPT;
+ break;
+ }
+
+ return (error);
}
/*
* specifying behavior of outgoing packets.
*/
static int
-ip6_pcbopts(pktopt, m, so, sopt)
- struct ip6_pktopts **pktopt;
- struct mbuf *m;
- struct socket *so;
- struct sockopt *sopt;
+ip6_pcbopts(struct ip6_pktopts **pktopt, struct mbuf *m, struct socket *so,
+ struct sockopt *sopt)
{
+#pragma unused(sopt)
struct ip6_pktopts *opt = *pktopt;
int error = 0;
- struct proc *p = sopt->sopt_p;
- int priv = 0;
/* turn off any old options. */
- if (opt) {
+ if (opt != NULL) {
#if DIAGNOSTIC
if (opt->ip6po_pktinfo || opt->ip6po_nexthop ||
opt->ip6po_hbh || opt->ip6po_dest1 || opt->ip6po_dest2 ||
opt->ip6po_rhinfo.ip6po_rhi_rthdr)
- printf("ip6_pcbopts: all specified options are cleared.\n");
+ printf("%s: all specified options are cleared.\n",
+ __func__);
#endif
- ip6_clearpktopts(opt, 1, -1);
- } else
- opt = _MALLOC(sizeof(*opt), M_IP6OPT, M_WAITOK);
+ ip6_clearpktopts(opt, -1);
+ } else {
+ opt = _MALLOC(sizeof (*opt), M_IP6OPT, M_WAITOK);
+ if (opt == NULL)
+ return (ENOBUFS);
+ }
*pktopt = NULL;
- if (!m || m->m_len == 0) {
+ if (m == NULL || m->m_len == 0) {
/*
* Only turning off any previous options, regardless of
* whether the opt is just created or given.
*/
- if (opt)
+ if (opt != NULL)
FREE(opt, M_IP6OPT);
- return(0);
+ return (0);
}
/* set options specified by user. */
- if (p && !proc_suser(p))
- priv = 1;
- if ((error = ip6_setpktoptions(m, opt, priv, 1)) != 0) {
- ip6_clearpktopts(opt, 1, -1); /* XXX: discard all options */
+ if ((error = ip6_setpktopts(m, opt, NULL, SOCK_PROTO(so))) != 0) {
+ ip6_clearpktopts(opt, -1); /* XXX: discard all options */
FREE(opt, M_IP6OPT);
- return(error);
+ return (error);
}
*pktopt = opt;
- return(0);
+ return (0);
}
/*
* the struct.
*/
void
-init_ip6pktopts(opt)
- struct ip6_pktopts *opt;
+ip6_initpktopts(struct ip6_pktopts *opt)
{
- bzero(opt, sizeof(*opt));
+ bzero(opt, sizeof (*opt));
opt->ip6po_hlim = -1; /* -1 means default hop limit */
+ opt->ip6po_tclass = -1; /* -1 means default traffic class */
+ opt->ip6po_minmtu = IP6PO_MINMTU_MCASTONLY;
+ opt->ip6po_prefer_tempaddr = IP6PO_TEMPADDR_SYSTEM;
+}
+
+static int
+ip6_pcbopt(int optname, u_char *buf, int len, struct ip6_pktopts **pktopt,
+ int uproto)
+{
+ struct ip6_pktopts *opt;
+
+ opt = *pktopt;
+ if (opt == NULL) {
+ opt = _MALLOC(sizeof (*opt), M_IP6OPT, M_WAITOK);
+ if (opt == NULL)
+ return (ENOBUFS);
+ ip6_initpktopts(opt);
+ *pktopt = opt;
+ }
+
+ return (ip6_setpktopt(optname, buf, len, opt, 1, 0, uproto));
+}
+
+static int
+ip6_getpcbopt(struct ip6_pktopts *pktopt, int optname, struct sockopt *sopt)
+{
+ void *optdata = NULL;
+ int optdatalen = 0;
+ struct ip6_ext *ip6e;
+ struct in6_pktinfo null_pktinfo;
+ int deftclass = 0, on;
+ int defminmtu = IP6PO_MINMTU_MCASTONLY;
+ int defpreftemp = IP6PO_TEMPADDR_SYSTEM;
+
+
+ switch (optname) {
+ case IPV6_PKTINFO:
+ if (pktopt && pktopt->ip6po_pktinfo)
+ optdata = (void *)pktopt->ip6po_pktinfo;
+ else {
+ /* XXX: we don't have to do this every time... */
+ bzero(&null_pktinfo, sizeof (null_pktinfo));
+ optdata = (void *)&null_pktinfo;
+ }
+ optdatalen = sizeof (struct in6_pktinfo);
+ break;
+
+ case IPV6_TCLASS:
+ if (pktopt && pktopt->ip6po_tclass >= 0)
+ optdata = (void *)&pktopt->ip6po_tclass;
+ else
+ optdata = (void *)&deftclass;
+ optdatalen = sizeof (int);
+ break;
+
+ case IPV6_HOPOPTS:
+ if (pktopt && pktopt->ip6po_hbh) {
+ optdata = (void *)pktopt->ip6po_hbh;
+ ip6e = (struct ip6_ext *)pktopt->ip6po_hbh;
+ optdatalen = (ip6e->ip6e_len + 1) << 3;
+ }
+ break;
+
+ case IPV6_RTHDR:
+ if (pktopt && pktopt->ip6po_rthdr) {
+ optdata = (void *)pktopt->ip6po_rthdr;
+ ip6e = (struct ip6_ext *)pktopt->ip6po_rthdr;
+ optdatalen = (ip6e->ip6e_len + 1) << 3;
+ }
+ break;
+
+ case IPV6_RTHDRDSTOPTS:
+ if (pktopt && pktopt->ip6po_dest1) {
+ optdata = (void *)pktopt->ip6po_dest1;
+ ip6e = (struct ip6_ext *)pktopt->ip6po_dest1;
+ optdatalen = (ip6e->ip6e_len + 1) << 3;
+ }
+ break;
+
+ case IPV6_DSTOPTS:
+ if (pktopt && pktopt->ip6po_dest2) {
+ optdata = (void *)pktopt->ip6po_dest2;
+ ip6e = (struct ip6_ext *)pktopt->ip6po_dest2;
+ optdatalen = (ip6e->ip6e_len + 1) << 3;
+ }
+ break;
+
+ case IPV6_NEXTHOP:
+ if (pktopt && pktopt->ip6po_nexthop) {
+ optdata = (void *)pktopt->ip6po_nexthop;
+ optdatalen = pktopt->ip6po_nexthop->sa_len;
+ }
+ break;
+
+ case IPV6_USE_MIN_MTU:
+ if (pktopt)
+ optdata = (void *)&pktopt->ip6po_minmtu;
+ else
+ optdata = (void *)&defminmtu;
+ optdatalen = sizeof (int);
+ break;
+
+ case IPV6_DONTFRAG:
+ if (pktopt && ((pktopt->ip6po_flags) & IP6PO_DONTFRAG))
+ on = 1;
+ else
+ on = 0;
+ optdata = (void *)&on;
+ optdatalen = sizeof (on);
+ break;
+
+ case IPV6_PREFER_TEMPADDR:
+ if (pktopt)
+ optdata = (void *)&pktopt->ip6po_prefer_tempaddr;
+ else
+ optdata = (void *)&defpreftemp;
+ optdatalen = sizeof (int);
+ break;
+
+ default: /* should not happen */
+#ifdef DIAGNOSTIC
+ panic("ip6_getpcbopt: unexpected option\n");
+#endif
+ return (ENOPROTOOPT);
+ }
+
+ return (sooptcopyout(sopt, optdata, optdatalen));
}
void
-ip6_clearpktopts(pktopt, needfree, optname)
- struct ip6_pktopts *pktopt;
- int needfree, optname;
+ip6_clearpktopts(struct ip6_pktopts *pktopt, int optname)
{
if (pktopt == NULL)
return;
- if (optname == -1) {
- if (needfree && pktopt->ip6po_pktinfo)
+ if (optname == -1 || optname == IPV6_PKTINFO) {
+ if (pktopt->ip6po_pktinfo)
FREE(pktopt->ip6po_pktinfo, M_IP6OPT);
pktopt->ip6po_pktinfo = NULL;
}
- if (optname == -1)
+ if (optname == -1 || optname == IPV6_HOPLIMIT)
pktopt->ip6po_hlim = -1;
- if (optname == -1) {
- if (needfree && pktopt->ip6po_nexthop)
+ if (optname == -1 || optname == IPV6_TCLASS)
+ pktopt->ip6po_tclass = -1;
+ if (optname == -1 || optname == IPV6_NEXTHOP) {
+ ROUTE_RELEASE(&pktopt->ip6po_nextroute);
+ if (pktopt->ip6po_nexthop)
FREE(pktopt->ip6po_nexthop, M_IP6OPT);
pktopt->ip6po_nexthop = NULL;
}
- if (optname == -1) {
- if (needfree && pktopt->ip6po_hbh)
+ if (optname == -1 || optname == IPV6_HOPOPTS) {
+ if (pktopt->ip6po_hbh)
FREE(pktopt->ip6po_hbh, M_IP6OPT);
pktopt->ip6po_hbh = NULL;
}
- if (optname == -1) {
- if (needfree && pktopt->ip6po_dest1)
+ if (optname == -1 || optname == IPV6_RTHDRDSTOPTS) {
+ if (pktopt->ip6po_dest1)
FREE(pktopt->ip6po_dest1, M_IP6OPT);
pktopt->ip6po_dest1 = NULL;
}
- if (optname == -1) {
- if (needfree && pktopt->ip6po_rhinfo.ip6po_rhi_rthdr)
+ if (optname == -1 || optname == IPV6_RTHDR) {
+ if (pktopt->ip6po_rhinfo.ip6po_rhi_rthdr)
FREE(pktopt->ip6po_rhinfo.ip6po_rhi_rthdr, M_IP6OPT);
pktopt->ip6po_rhinfo.ip6po_rhi_rthdr = NULL;
- if (pktopt->ip6po_route.ro_rt) {
- rtfree(pktopt->ip6po_route.ro_rt);
- pktopt->ip6po_route.ro_rt = NULL;
- }
+ ROUTE_RELEASE(&pktopt->ip6po_route);
}
- if (optname == -1) {
- if (needfree && pktopt->ip6po_dest2)
+ if (optname == -1 || optname == IPV6_DSTOPTS) {
+ if (pktopt->ip6po_dest2)
FREE(pktopt->ip6po_dest2, M_IP6OPT);
pktopt->ip6po_dest2 = NULL;
}
}
-#define PKTOPT_EXTHDRCPY(type) \
-do {\
- if (src->type) {\
- int hlen =\
- (((struct ip6_ext *)src->type)->ip6e_len + 1) << 3;\
- dst->type = _MALLOC(hlen, M_IP6OPT, canwait);\
- if (dst->type == NULL && canwait == M_NOWAIT)\
- goto bad;\
- bcopy(src->type, dst->type, hlen);\
- }\
+#define PKTOPT_EXTHDRCPY(type) do { \
+ if (src->type) { \
+ int hlen = \
+ (((struct ip6_ext *)src->type)->ip6e_len + 1) << 3; \
+ dst->type = _MALLOC(hlen, M_IP6OPT, canwait); \
+ if (dst->type == NULL && canwait == M_NOWAIT) \
+ goto bad; \
+ bcopy(src->type, dst->type, hlen); \
+ } \
} while (0)
-struct ip6_pktopts *
-ip6_copypktopts(src, canwait)
- struct ip6_pktopts *src;
- int canwait;
+static int
+copypktopts(struct ip6_pktopts *dst, struct ip6_pktopts *src, int canwait)
{
- struct ip6_pktopts *dst;
-
- if (src == NULL) {
- printf("ip6_clearpktopts: invalid argument\n");
- return(NULL);
+ if (dst == NULL || src == NULL) {
+ printf("copypktopts: invalid argument\n");
+ return (EINVAL);
}
- dst = _MALLOC(sizeof(*dst), M_IP6OPT, canwait);
- if (dst == NULL && canwait == M_NOWAIT)
- return (NULL);
- bzero(dst, sizeof(*dst));
-
dst->ip6po_hlim = src->ip6po_hlim;
+ dst->ip6po_tclass = src->ip6po_tclass;
+ dst->ip6po_flags = src->ip6po_flags;
if (src->ip6po_pktinfo) {
- dst->ip6po_pktinfo = _MALLOC(sizeof(*dst->ip6po_pktinfo),
- M_IP6OPT, canwait);
+ dst->ip6po_pktinfo = _MALLOC(sizeof (*dst->ip6po_pktinfo),
+ M_IP6OPT, canwait);
if (dst->ip6po_pktinfo == NULL && canwait == M_NOWAIT)
goto bad;
*dst->ip6po_pktinfo = *src->ip6po_pktinfo;
}
if (src->ip6po_nexthop) {
dst->ip6po_nexthop = _MALLOC(src->ip6po_nexthop->sa_len,
- M_IP6OPT, canwait);
+ M_IP6OPT, canwait);
if (dst->ip6po_nexthop == NULL && canwait == M_NOWAIT)
goto bad;
bcopy(src->ip6po_nexthop, dst->ip6po_nexthop,
- src->ip6po_nexthop->sa_len);
+ src->ip6po_nexthop->sa_len);
}
PKTOPT_EXTHDRCPY(ip6po_hbh);
PKTOPT_EXTHDRCPY(ip6po_dest1);
PKTOPT_EXTHDRCPY(ip6po_dest2);
PKTOPT_EXTHDRCPY(ip6po_rthdr); /* not copy the cached route */
- return(dst);
-
- bad:
- if (dst->ip6po_pktinfo) FREE(dst->ip6po_pktinfo, M_IP6OPT);
- if (dst->ip6po_nexthop) FREE(dst->ip6po_nexthop, M_IP6OPT);
- if (dst->ip6po_hbh) FREE(dst->ip6po_hbh, M_IP6OPT);
- if (dst->ip6po_dest1) FREE(dst->ip6po_dest1, M_IP6OPT);
- if (dst->ip6po_dest2) FREE(dst->ip6po_dest2, M_IP6OPT);
- if (dst->ip6po_rthdr) FREE(dst->ip6po_rthdr, M_IP6OPT);
- FREE(dst, M_IP6OPT);
- return(NULL);
+ return (0);
+
+bad:
+ ip6_clearpktopts(dst, -1);
+ return (ENOBUFS);
}
#undef PKTOPT_EXTHDRCPY
-void
-ip6_freepcbopts(pktopt)
- struct ip6_pktopts *pktopt;
+struct ip6_pktopts *
+ip6_copypktopts(struct ip6_pktopts *src, int canwait)
{
- if (pktopt == NULL)
- return;
-
- ip6_clearpktopts(pktopt, 1, -1);
+ int error;
+ struct ip6_pktopts *dst;
- FREE(pktopt, M_IP6OPT);
-}
+ dst = _MALLOC(sizeof (*dst), M_IP6OPT, canwait);
+ if (dst == NULL)
+ return (NULL);
+ ip6_initpktopts(dst);
-/*
- * Set the IP6 multicast options in response to user setsockopt().
- */
-static int
-ip6_setmoptions(
- int optname,
- struct inpcb* in6p,
- struct mbuf *m)
-{
- int error = 0;
- u_int loop, ifindex;
- struct ipv6_mreq *mreq;
- struct ifnet *ifp;
- struct ip6_moptions **im6op = &in6p->in6p_moptions;
- struct ip6_moptions *im6o = *im6op;
- struct ip_moptions *imo;
- struct route_in6 ro;
- struct sockaddr_in6 *dst;
- struct in6_multi_mship *imm;
- struct proc *p = current_proc(); /* XXX */
-
- if (im6o == NULL) {
- /*
- * No multicast option buffer attached to the pcb;
- * allocate one and initialize to default values.
- */
- im6o = (struct ip6_moptions *)
- _MALLOC(sizeof(*im6o), M_IPMOPTS, M_WAITOK);
-
- if (im6o == NULL)
- return(ENOBUFS);
- *im6op = im6o;
- im6o->im6o_multicast_ifp = NULL;
- im6o->im6o_multicast_hlim = ip6_defmcasthlim;
- im6o->im6o_multicast_loop = IPV6_DEFAULT_MULTICAST_LOOP;
- LIST_INIT(&im6o->im6o_memberships);
- }
-
- if (in6p->inp_moptions == NULL) {
- /*
- * No IPv4 multicast option buffer attached to the pcb;
- * call ip_createmoptions to allocate one and initialize
- * to default values.
- */
- error = ip_createmoptions(&in6p->inp_moptions);
- if (error != 0)
- return error;
+ if ((error = copypktopts(dst, src, canwait)) != 0) {
+ FREE(dst, M_IP6OPT);
+ return (NULL);
}
- imo = in6p->inp_moptions;
-
- switch (optname) {
-
- case IPV6_MULTICAST_IF:
- /*
- * Select the interface for outgoing multicast packets.
- */
- if (m == NULL || m->m_len != sizeof(u_int)) {
- error = EINVAL;
- break;
- }
- bcopy(mtod(m, u_int *), &ifindex, sizeof(ifindex));
- if (ifindex < 0 || if_index < ifindex) {
- error = ENXIO; /* XXX EINVAL? */
- break;
- }
- ifp = ifindex2ifnet[ifindex];
- if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
- error = EADDRNOTAVAIL;
- break;
- }
- im6o->im6o_multicast_ifp = ifp;
- imo->imo_multicast_ifp = ifp;
- break;
-
- case IPV6_MULTICAST_HOPS:
- {
- /*
- * Set the IP6 hoplimit for outgoing multicast packets.
- */
- int optval;
- if (m == NULL || m->m_len != sizeof(int)) {
- error = EINVAL;
- break;
- }
- bcopy(mtod(m, u_int *), &optval, sizeof(optval));
- if (optval < -1 || optval >= 256)
- error = EINVAL;
- else if (optval == -1) {
- im6o->im6o_multicast_hlim = ip6_defmcasthlim;
- imo->imo_multicast_ttl = IP_DEFAULT_MULTICAST_TTL;
- } else {
- im6o->im6o_multicast_hlim = optval;
- imo->imo_multicast_ttl = optval;
- }
- break;
- }
- case IPV6_MULTICAST_LOOP:
- /*
- * Set the loopback flag for outgoing multicast packets.
- * Must be zero or one.
- */
- if (m == NULL || m->m_len != sizeof(u_int)) {
- error = EINVAL;
- break;
- }
- bcopy(mtod(m, u_int *), &loop, sizeof(loop));
- if (loop > 1) {
- error = EINVAL;
- break;
- }
- im6o->im6o_multicast_loop = loop;
- imo->imo_multicast_loop = loop;
- break;
-
- case IPV6_JOIN_GROUP:
- /*
- * Add a multicast group membership.
- * Group must be a valid IP6 multicast address.
- */
- if (m == NULL || m->m_len != sizeof(struct ipv6_mreq)) {
- error = EINVAL;
- break;
- }
- mreq = mtod(m, struct ipv6_mreq *);
- /*
- * If the interface is specified, validate it.
- */
- if (mreq->ipv6mr_interface < 0
- || if_index < mreq->ipv6mr_interface) {
- error = ENXIO; /* XXX EINVAL? */
- break;
- }
-
- if (IN6_IS_ADDR_UNSPECIFIED(&mreq->ipv6mr_multiaddr)) {
- /*
- * We use the unspecified address to specify to accept
- * all multicast addresses. Only super user is allowed
- * to do this.
- */
- if (suser(kauth_cred_get(), 0))
- {
- error = EACCES;
- break;
- }
- } else if (IN6_IS_ADDR_V4MAPPED(&mreq->ipv6mr_multiaddr)) {
- struct ip_mreq v4req;
-
- v4req.imr_multiaddr.s_addr = mreq->ipv6mr_multiaddr.s6_addr32[3];
- v4req.imr_interface.s_addr = INADDR_ANY;
-
- /* Find an IPv4 address on the specified interface. */
- if (mreq->ipv6mr_interface != 0) {
- struct in_ifaddr *ifa;
-
- ifp = ifindex2ifnet[mreq->ipv6mr_interface];
-
- lck_mtx_lock(rt_mtx);
- TAILQ_FOREACH(ifa, &in_ifaddrhead, ia_link) {
- if (ifa->ia_ifp == ifp) {
- v4req.imr_interface = IA_SIN(ifa)->sin_addr;
- break;
- }
- }
- lck_mtx_unlock(rt_mtx);
-
- if (v4req.imr_multiaddr.s_addr == 0) {
- /* Interface has no IPv4 address. */
- error = EINVAL;
- break;
- }
- }
-
- error = ip_addmembership(imo, &v4req);
- break;
- } else if (!IN6_IS_ADDR_MULTICAST(&mreq->ipv6mr_multiaddr)) {
- error = EINVAL;
- break;
- }
- /*
- * If no interface was explicitly specified, choose an
- * appropriate one according to the given multicast address.
- */
- if (mreq->ipv6mr_interface == 0) {
- /*
- * If the multicast address is in node-local scope,
- * the interface should be a loopback interface.
- * Otherwise, look up the routing table for the
- * address, and choose the outgoing interface.
- * XXX: is it a good approach?
- */
- if (IN6_IS_ADDR_MC_NODELOCAL(&mreq->ipv6mr_multiaddr)) {
- ifp = &loif[0];
- } else {
- ro.ro_rt = NULL;
- dst = (struct sockaddr_in6 *)&ro.ro_dst;
- bzero(dst, sizeof(*dst));
- dst->sin6_len = sizeof(struct sockaddr_in6);
- dst->sin6_family = AF_INET6;
- dst->sin6_addr = mreq->ipv6mr_multiaddr;
- rtalloc((struct route *)&ro);
- if (ro.ro_rt == NULL) {
- error = EADDRNOTAVAIL;
- break;
- }
- ifp = ro.ro_rt->rt_ifp;
- rtfree(ro.ro_rt);
- }
- } else
- ifp = ifindex2ifnet[mreq->ipv6mr_interface];
-
- /*
- * See if we found an interface, and confirm that it
- * supports multicast
- */
- if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
- error = EADDRNOTAVAIL;
- break;
- }
- /*
- * Put interface index into the multicast address,
- * if the address has link-local scope.
- */
- if (IN6_IS_ADDR_MC_LINKLOCAL(&mreq->ipv6mr_multiaddr)) {
- mreq->ipv6mr_multiaddr.s6_addr16[1]
- = htons(mreq->ipv6mr_interface);
- }
- /*
- * See if the membership already exists.
- */
- lck_mtx_lock(nd6_mutex);
- for (imm = im6o->im6o_memberships.lh_first;
- imm != NULL; imm = imm->i6mm_chain.le_next)
- if (imm->i6mm_maddr->in6m_ifp == ifp &&
- IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
- &mreq->ipv6mr_multiaddr))
- break;
- if (imm != NULL) {
- error = EADDRINUSE;
- lck_mtx_unlock(nd6_mutex);
- break;
- }
- /*
- * Everything looks good; add a new record to the multicast
- * address list for the given interface.
- */
- imm = _MALLOC(sizeof(*imm), M_IPMADDR, M_WAITOK);
- if (imm == NULL) {
- error = ENOBUFS;
- lck_mtx_unlock(nd6_mutex);
- break;
- }
- if ((imm->i6mm_maddr =
- in6_addmulti(&mreq->ipv6mr_multiaddr, ifp, &error, 1)) == NULL) {
- FREE(imm, M_IPMADDR);
- lck_mtx_unlock(nd6_mutex);
- break;
- }
- LIST_INSERT_HEAD(&im6o->im6o_memberships, imm, i6mm_chain);
- lck_mtx_unlock(nd6_mutex);
- break;
-
- case IPV6_LEAVE_GROUP:
- /*
- * Drop a multicast group membership.
- * Group must be a valid IP6 multicast address.
- */
- if (m == NULL || m->m_len != sizeof(struct ipv6_mreq)) {
- error = EINVAL;
- break;
- }
- mreq = mtod(m, struct ipv6_mreq *);
- /*
- * If an interface address was specified, get a pointer
- * to its ifnet structure.
- */
- if (mreq->ipv6mr_interface < 0
- || if_index < mreq->ipv6mr_interface) {
- error = ENXIO; /* XXX EINVAL? */
- break;
- }
- ifp = ifindex2ifnet[mreq->ipv6mr_interface];
-
- if (IN6_IS_ADDR_UNSPECIFIED(&mreq->ipv6mr_multiaddr)) {
- if (suser(kauth_cred_get(), 0)) {
- error = EACCES;
- break;
- }
- } else if (IN6_IS_ADDR_V4MAPPED(&mreq->ipv6mr_multiaddr)) {
- struct ip_mreq v4req;
-
- v4req.imr_multiaddr.s_addr = mreq->ipv6mr_multiaddr.s6_addr32[3];
- v4req.imr_interface.s_addr = INADDR_ANY;
-
- if (ifp != NULL) {
- struct in_ifaddr *ifa;
-
- lck_mtx_lock(rt_mtx);
- TAILQ_FOREACH(ifa, &in_ifaddrhead, ia_link) {
- if (ifa->ia_ifp == ifp) {
- v4req.imr_interface = IA_SIN(ifa)->sin_addr;
- break;
- }
- }
- lck_mtx_unlock(rt_mtx);
- }
-
- error = ip_dropmembership(imo, &v4req);
- break;
- } else if (!IN6_IS_ADDR_MULTICAST(&mreq->ipv6mr_multiaddr)) {
- error = EINVAL;
- break;
- }
- /*
- * Put interface index into the multicast address,
- * if the address has link-local scope.
- */
- if (IN6_IS_ADDR_MC_LINKLOCAL(&mreq->ipv6mr_multiaddr)) {
- mreq->ipv6mr_multiaddr.s6_addr16[1]
- = htons(mreq->ipv6mr_interface);
- }
- /*
- * Find the membership in the membership list.
- */
- lck_mtx_lock(nd6_mutex);
- for (imm = im6o->im6o_memberships.lh_first;
- imm != NULL; imm = imm->i6mm_chain.le_next) {
- if ((ifp == NULL ||
- imm->i6mm_maddr->in6m_ifp == ifp) &&
- IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
- &mreq->ipv6mr_multiaddr))
- break;
- }
- if (imm == NULL) {
- /* Unable to resolve interface */
- error = EADDRNOTAVAIL;
- lck_mtx_unlock(nd6_mutex);
- break;
- }
- /*
- * Give up the multicast address record to which the
- * membership points.
- */
- LIST_REMOVE(imm, i6mm_chain);
- in6_delmulti(imm->i6mm_maddr, 1);
- lck_mtx_unlock(nd6_mutex);
- FREE(imm, M_IPMADDR);
- break;
+ return (dst);
+}
- default:
- error = EOPNOTSUPP;
- break;
- }
+void
+ip6_freepcbopts(struct ip6_pktopts *pktopt)
+{
+ if (pktopt == NULL)
+ return;
- /*
- * If all options have default values, no need to keep the mbuf.
- */
- lck_mtx_lock(nd6_mutex);
- if (im6o->im6o_multicast_ifp == NULL &&
- im6o->im6o_multicast_hlim == ip6_defmcasthlim &&
- im6o->im6o_multicast_loop == IPV6_DEFAULT_MULTICAST_LOOP &&
- im6o->im6o_memberships.lh_first == NULL) {
- FREE(*im6op, M_IPMOPTS);
- *im6op = NULL;
- }
- if (imo->imo_multicast_ifp == NULL &&
- imo->imo_multicast_vif == -1 &&
- imo->imo_multicast_ttl == IP_DEFAULT_MULTICAST_TTL &&
- imo->imo_multicast_loop == IP_DEFAULT_MULTICAST_LOOP &&
- imo->imo_num_memberships == 0) {
- ip_freemoptions(imo);
- in6p->inp_moptions = 0;
- }
- lck_mtx_unlock(nd6_mutex);
-
- return(error);
+ ip6_clearpktopts(pktopt, -1);
+
+ FREE(pktopt, M_IP6OPT);
}
-/*
- * Return the IP6 multicast options in response to user getsockopt().
- */
-static int
-ip6_getmoptions(optname, im6o, mp)
- int optname;
- struct ip6_moptions *im6o;
- struct mbuf **mp;
+void
+ip6_moptions_init(void)
{
- u_int *hlim, *loop, *ifindex;
+ PE_parse_boot_argn("ifa_debug", &im6o_debug, sizeof (im6o_debug));
- *mp = m_get(M_WAIT, MT_HEADER); /*XXX*/
+ im6o_size = (im6o_debug == 0) ? sizeof (struct ip6_moptions) :
+ sizeof (struct ip6_moptions_dbg);
- switch (optname) {
+ im6o_zone = zinit(im6o_size, IM6O_ZONE_MAX * im6o_size, 0,
+ IM6O_ZONE_NAME);
+ if (im6o_zone == NULL) {
+ panic("%s: failed allocating %s", __func__, IM6O_ZONE_NAME);
+ /* NOTREACHED */
+ }
+ zone_change(im6o_zone, Z_EXPAND, TRUE);
+}
- case IPV6_MULTICAST_IF:
- ifindex = mtod(*mp, u_int *);
- (*mp)->m_len = sizeof(u_int);
- if (im6o == NULL || im6o->im6o_multicast_ifp == NULL)
- *ifindex = 0;
- else
- *ifindex = im6o->im6o_multicast_ifp->if_index;
- return(0);
-
- case IPV6_MULTICAST_HOPS:
- hlim = mtod(*mp, u_int *);
- (*mp)->m_len = sizeof(u_int);
- if (im6o == NULL)
- *hlim = ip6_defmcasthlim;
- else
- *hlim = im6o->im6o_multicast_hlim;
- return(0);
-
- case IPV6_MULTICAST_LOOP:
- loop = mtod(*mp, u_int *);
- (*mp)->m_len = sizeof(u_int);
- if (im6o == NULL)
- *loop = ip6_defmcasthlim;
- else
- *loop = im6o->im6o_multicast_loop;
- return(0);
+void
+im6o_addref(struct ip6_moptions *im6o, int locked)
+{
+ if (!locked)
+ IM6O_LOCK(im6o);
+ else
+ IM6O_LOCK_ASSERT_HELD(im6o);
- default:
- return(EOPNOTSUPP);
+ if (++im6o->im6o_refcnt == 0) {
+ panic("%s: im6o %p wraparound refcnt\n", __func__, im6o);
+ /* NOTREACHED */
+ } else if (im6o->im6o_trace != NULL) {
+ (*im6o->im6o_trace)(im6o, TRUE);
}
+
+ if (!locked)
+ IM6O_UNLOCK(im6o);
}
-/*
- * Discard the IP6 multicast options.
- */
void
-ip6_freemoptions(im6o)
- struct ip6_moptions *im6o;
+im6o_remref(struct ip6_moptions *im6o)
{
- struct in6_multi_mship *imm;
+ int i;
+
+ IM6O_LOCK(im6o);
+ if (im6o->im6o_refcnt == 0) {
+ panic("%s: im6o %p negative refcnt", __func__, im6o);
+ /* NOTREACHED */
+ } else if (im6o->im6o_trace != NULL) {
+ (*im6o->im6o_trace)(im6o, FALSE);
+ }
- if (im6o == NULL)
+ --im6o->im6o_refcnt;
+ if (im6o->im6o_refcnt > 0) {
+ IM6O_UNLOCK(im6o);
return;
-
- lck_mtx_lock(nd6_mutex);
- while ((imm = im6o->im6o_memberships.lh_first) != NULL) {
- LIST_REMOVE(imm, i6mm_chain);
- if (imm->i6mm_maddr)
- in6_delmulti(imm->i6mm_maddr, 1);
- FREE(imm, M_IPMADDR);
- }
- lck_mtx_unlock(nd6_mutex);
- FREE(im6o, M_IPMOPTS);
+ }
+
+ for (i = 0; i < im6o->im6o_num_memberships; ++i) {
+ struct in6_mfilter *imf;
+
+ imf = im6o->im6o_mfilters ? &im6o->im6o_mfilters[i] : NULL;
+ if (imf != NULL)
+ im6f_leave(imf);
+
+ (void) in6_mc_leave(im6o->im6o_membership[i], imf);
+
+ if (imf != NULL)
+ im6f_purge(imf);
+
+ IN6M_REMREF(im6o->im6o_membership[i]);
+ im6o->im6o_membership[i] = NULL;
+ }
+ im6o->im6o_num_memberships = 0;
+ if (im6o->im6o_mfilters != NULL) {
+ FREE(im6o->im6o_mfilters, M_IN6MFILTER);
+ im6o->im6o_mfilters = NULL;
+ }
+ if (im6o->im6o_membership != NULL) {
+ FREE(im6o->im6o_membership, M_IP6MOPTS);
+ im6o->im6o_membership = NULL;
+ }
+ IM6O_UNLOCK(im6o);
+
+ lck_mtx_destroy(&im6o->im6o_lock, ifa_mtx_grp);
+
+ if (!(im6o->im6o_debug & IFD_ALLOC)) {
+ panic("%s: im6o %p cannot be freed", __func__, im6o);
+ /* NOTREACHED */
+ }
+ zfree(im6o_zone, im6o);
+}
+
+static void
+im6o_trace(struct ip6_moptions *im6o, int refhold)
+{
+ struct ip6_moptions_dbg *im6o_dbg = (struct ip6_moptions_dbg *)im6o;
+ ctrace_t *tr;
+ u_int32_t idx;
+ u_int16_t *cnt;
+
+ if (!(im6o->im6o_debug & IFD_DEBUG)) {
+ panic("%s: im6o %p has no debug structure", __func__, im6o);
+ /* NOTREACHED */
+ }
+ if (refhold) {
+ cnt = &im6o_dbg->im6o_refhold_cnt;
+ tr = im6o_dbg->im6o_refhold;
+ } else {
+ cnt = &im6o_dbg->im6o_refrele_cnt;
+ tr = im6o_dbg->im6o_refrele;
+ }
+
+ idx = atomic_add_16_ov(cnt, 1) % IM6O_TRACE_HIST_SIZE;
+ ctrace_record(&tr[idx]);
+}
+
+struct ip6_moptions *
+ip6_allocmoptions(int how)
+{
+ struct ip6_moptions *im6o;
+
+ im6o = (how == M_WAITOK) ?
+ zalloc(im6o_zone) : zalloc_noblock(im6o_zone);
+ if (im6o != NULL) {
+ bzero(im6o, im6o_size);
+ lck_mtx_init(&im6o->im6o_lock, ifa_mtx_grp, ifa_mtx_attr);
+ im6o->im6o_debug |= IFD_ALLOC;
+ if (im6o_debug != 0) {
+ im6o->im6o_debug |= IFD_DEBUG;
+ im6o->im6o_trace = im6o_trace;
+ }
+ IM6O_ADDREF(im6o);
+ }
+
+ return (im6o);
}
/*
* Set IPv6 outgoing packet options based on advanced API.
*/
int
-ip6_setpktoptions(control, opt, priv, needcopy)
- struct mbuf *control;
- struct ip6_pktopts *opt;
- int priv, needcopy;
+ip6_setpktopts(struct mbuf *control, struct ip6_pktopts *opt,
+ struct ip6_pktopts *stickyopt, int uproto)
{
- struct cmsghdr *cm = 0;
+ struct cmsghdr *cm = NULL;
- if (control == 0 || opt == 0)
- return(EINVAL);
+ if (control == NULL || opt == NULL)
+ return (EINVAL);
- init_ip6pktopts(opt);
+ ip6_initpktopts(opt);
+ if (stickyopt) {
+ int error;
+
+ /*
+ * If stickyopt is provided, make a local copy of the options
+ * for this particular packet, then override them by ancillary
+ * objects.
+ * XXX: copypktopts() does not copy the cached route to a next
+ * hop (if any). This is not very good in terms of efficiency,
+ * but we can allow this since this option should be rarely
+ * used.
+ */
+ if ((error = copypktopts(opt, stickyopt, M_NOWAIT)) != 0)
+ return (error);
+ }
/*
* XXX: Currently, we assume all the optional information is stored
* in a single mbuf.
*/
if (control->m_next)
- return(EINVAL);
+ return (EINVAL);
- for (; control->m_len; control->m_data += CMSG_ALIGN(cm->cmsg_len),
- control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
- cm = mtod(control, struct cmsghdr *);
- if (cm->cmsg_len == 0 || cm->cmsg_len > control->m_len)
- return(EINVAL);
+ if (control->m_len < CMSG_LEN(0))
+ return (EINVAL);
+
+ for (cm = M_FIRST_CMSGHDR(control); cm != NULL;
+ cm = M_NXT_CMSGHDR(control, cm)) {
+ int error;
+
+ if (cm->cmsg_len < sizeof (struct cmsghdr) ||
+ cm->cmsg_len > control->m_len)
+ return (EINVAL);
if (cm->cmsg_level != IPPROTO_IPV6)
continue;
+ error = ip6_setpktopt(cm->cmsg_type, CMSG_DATA(cm),
+ cm->cmsg_len - CMSG_LEN(0), opt, 0, 1, uproto);
+ if (error)
+ return (error);
+ }
+
+ return (0);
+}
+/*
+ * Set a particular packet option, as a sticky option or an ancillary data
+ * item. "len" can be 0 only when it's a sticky option.
+ * We have 4 cases of combination of "sticky" and "cmsg":
+ * "sticky=0, cmsg=0": impossible
+ * "sticky=0, cmsg=1": RFC2292 or RFC3542 ancillary data
+ * "sticky=1, cmsg=0": RFC3542 socket option
+ * "sticky=1, cmsg=1": RFC2292 socket option
+ */
+static int
+ip6_setpktopt(int optname, u_char *buf, int len, struct ip6_pktopts *opt,
+ int sticky, int cmsg, int uproto)
+{
+ int minmtupolicy, preftemp;
+ int error;
+ boolean_t capture_exthdrstat_out = FALSE;
+
+ if (!sticky && !cmsg) {
+#ifdef DIAGNOSTIC
+ printf("ip6_setpktopt: impossible case\n");
+#endif
+ return (EINVAL);
+ }
+
+ /*
+ * Caller must have ensured that the buffer is at least
+ * aligned on 32-bit boundary.
+ */
+ VERIFY(IS_P2ALIGNED(buf, sizeof (u_int32_t)));
+
+ /*
+ * IPV6_2292xxx is for backward compatibility to RFC2292, and should
+ * not be specified in the context of RFC3542. Conversely,
+ * RFC3542 types should not be specified in the context of RFC2292.
+ */
+ if (!cmsg) {
+ switch (optname) {
+ case IPV6_2292PKTINFO:
+ case IPV6_2292HOPLIMIT:
+ case IPV6_2292NEXTHOP:
+ case IPV6_2292HOPOPTS:
+ case IPV6_2292DSTOPTS:
+ case IPV6_2292RTHDR:
+ case IPV6_2292PKTOPTIONS:
+ return (ENOPROTOOPT);
+ }
+ }
+ if (sticky && cmsg) {
+ switch (optname) {
+ case IPV6_PKTINFO:
+ case IPV6_HOPLIMIT:
+ case IPV6_NEXTHOP:
+ case IPV6_HOPOPTS:
+ case IPV6_DSTOPTS:
+ case IPV6_RTHDRDSTOPTS:
+ case IPV6_RTHDR:
+ case IPV6_USE_MIN_MTU:
+ case IPV6_DONTFRAG:
+ case IPV6_TCLASS:
+ case IPV6_PREFER_TEMPADDR: /* XXX: not an RFC3542 option */
+ return (ENOPROTOOPT);
+ }
+ }
+
+ switch (optname) {
+ case IPV6_2292PKTINFO:
+ case IPV6_PKTINFO: {
+ struct ifnet *ifp = NULL;
+ struct in6_pktinfo *pktinfo;
+
+ if (len != sizeof (struct in6_pktinfo))
+ return (EINVAL);
+
+ pktinfo = (struct in6_pktinfo *)(void *)buf;
+
/*
- * XXX should check if RFC2292 API is mixed with 2292bis API
+ * An application can clear any sticky IPV6_PKTINFO option by
+ * doing a "regular" setsockopt with ipi6_addr being
+ * in6addr_any and ipi6_ifindex being zero.
+ * [RFC 3542, Section 6]
*/
- switch (cm->cmsg_type) {
- case IPV6_PKTINFO:
- if (cm->cmsg_len != CMSG_LEN(sizeof(struct in6_pktinfo)))
- return(EINVAL);
- if (needcopy) {
- /* XXX: Is it really WAITOK? */
- opt->ip6po_pktinfo =
- _MALLOC(sizeof(struct in6_pktinfo),
- M_IP6OPT, M_WAITOK);
- bcopy(CMSG_DATA(cm), opt->ip6po_pktinfo,
- sizeof(struct in6_pktinfo));
- } else
- opt->ip6po_pktinfo =
- (struct in6_pktinfo *)CMSG_DATA(cm);
- if (opt->ip6po_pktinfo->ipi6_ifindex &&
- IN6_IS_ADDR_LINKLOCAL(&opt->ip6po_pktinfo->ipi6_addr))
- opt->ip6po_pktinfo->ipi6_addr.s6_addr16[1] =
- htons(opt->ip6po_pktinfo->ipi6_ifindex);
-
- if (opt->ip6po_pktinfo->ipi6_ifindex > if_index
- || opt->ip6po_pktinfo->ipi6_ifindex < 0) {
- return(ENXIO);
- }
+ if (optname == IPV6_PKTINFO && opt->ip6po_pktinfo &&
+ pktinfo->ipi6_ifindex == 0 &&
+ IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) {
+ ip6_clearpktopts(opt, optname);
+ break;
+ }
- /*
- * 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 (!IN6_IS_ADDR_UNSPECIFIED(&opt->ip6po_pktinfo->ipi6_addr)) {
- struct in6_ifaddr *ia6;
- struct sockaddr_in6 sin6;
-
- bzero(&sin6, sizeof(sin6));
- sin6.sin6_len = sizeof(sin6);
- sin6.sin6_family = AF_INET6;
- sin6.sin6_addr =
- opt->ip6po_pktinfo->ipi6_addr;
- ia6 = (struct in6_ifaddr *)ifa_ifwithaddr(sin6tosa(&sin6));
- if (ia6 == NULL ||
- (ia6->ia6_flags & (IN6_IFF_ANYCAST |
- IN6_IFF_NOTREADY)) != 0) {
- if (ia6) ifafree(&ia6->ia_ifa);
- return(EADDRNOTAVAIL);
- }
- ifafree(&ia6->ia_ifa);
- ia6 = NULL;
+ if (uproto == IPPROTO_TCP && optname == IPV6_PKTINFO &&
+ sticky && !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) {
+ return (EINVAL);
+ }
+
+ /* validate the interface index if specified. */
+ ifnet_head_lock_shared();
+
+ if (pktinfo->ipi6_ifindex > if_index) {
+ ifnet_head_done();
+ return (ENXIO);
+ }
+
+ if (pktinfo->ipi6_ifindex) {
+ ifp = ifindex2ifnet[pktinfo->ipi6_ifindex];
+ if (ifp == NULL) {
+ ifnet_head_done();
+ return (ENXIO);
}
- break;
+ }
- case IPV6_HOPLIMIT:
- if (cm->cmsg_len != CMSG_LEN(sizeof(int)))
- return(EINVAL);
+ ifnet_head_done();
- opt->ip6po_hlim = *(int *)CMSG_DATA(cm);
- if (opt->ip6po_hlim < -1 || opt->ip6po_hlim > 255)
- return(EINVAL);
- break;
+ /*
+ * We store the address anyway, and let in6_selectsrc()
+ * validate the specified address. This is because ipi6_addr
+ * may not have enough information about its scope zone, and
+ * we may need additional information (such as outgoing
+ * interface or the scope zone of a destination address) to
+ * disambiguate the scope.
+ * XXX: the delay of the validation may confuse the
+ * application when it is used as a sticky option.
+ */
+ if (opt->ip6po_pktinfo == NULL) {
+ opt->ip6po_pktinfo = _MALLOC(sizeof (*pktinfo),
+ M_IP6OPT, M_NOWAIT);
+ if (opt->ip6po_pktinfo == NULL)
+ return (ENOBUFS);
+ }
+ bcopy(pktinfo, opt->ip6po_pktinfo, sizeof (*pktinfo));
+ break;
+ }
- case IPV6_NEXTHOP:
- if (!priv)
- return(EPERM);
-
- if (cm->cmsg_len < sizeof(u_char) ||
- /* check if cmsg_len is large enough for sa_len */
- cm->cmsg_len < CMSG_LEN(*CMSG_DATA(cm)))
- return(EINVAL);
-
- if (needcopy) {
- opt->ip6po_nexthop =
- _MALLOC(*CMSG_DATA(cm),
- M_IP6OPT, M_WAITOK);
- bcopy(CMSG_DATA(cm),
- opt->ip6po_nexthop,
- *CMSG_DATA(cm));
- } else
- opt->ip6po_nexthop =
- (struct sockaddr *)CMSG_DATA(cm);
+ case IPV6_2292HOPLIMIT:
+ case IPV6_HOPLIMIT: {
+ int *hlimp;
+
+ /*
+ * RFC 3542 deprecated the usage of sticky IPV6_HOPLIMIT
+ * to simplify the ordering among hoplimit options.
+ */
+ if (optname == IPV6_HOPLIMIT && sticky)
+ return (ENOPROTOOPT);
+
+ if (len != sizeof (int))
+ return (EINVAL);
+ hlimp = (int *)(void *)buf;
+ if (*hlimp < -1 || *hlimp > 255)
+ return (EINVAL);
+
+ opt->ip6po_hlim = *hlimp;
+ break;
+ }
+
+ case IPV6_TCLASS: {
+ int tclass;
+
+ if (len != sizeof (int))
+ return (EINVAL);
+ tclass = *(int *)(void *)buf;
+ if (tclass < -1 || tclass > 255)
+ return (EINVAL);
+
+ opt->ip6po_tclass = tclass;
+ break;
+ }
+
+ case IPV6_2292NEXTHOP:
+ case IPV6_NEXTHOP:
+ error = suser(kauth_cred_get(), 0);
+ if (error)
+ return (EACCES);
+
+ if (len == 0) { /* just remove the option */
+ ip6_clearpktopts(opt, IPV6_NEXTHOP);
break;
+ }
- case IPV6_HOPOPTS:
- {
- struct ip6_hbh *hbh;
- int hbhlen;
-
- if (cm->cmsg_len < CMSG_LEN(sizeof(struct ip6_hbh)))
- return(EINVAL);
- hbh = (struct ip6_hbh *)CMSG_DATA(cm);
- hbhlen = (hbh->ip6h_len + 1) << 3;
- if (cm->cmsg_len != CMSG_LEN(hbhlen))
- return(EINVAL);
-
- if (needcopy) {
- opt->ip6po_hbh =
- _MALLOC(hbhlen, M_IP6OPT, M_WAITOK);
- bcopy(hbh, opt->ip6po_hbh, hbhlen);
- } else
- opt->ip6po_hbh = hbh;
+ /* check if cmsg_len is large enough for sa_len */
+ if (len < sizeof (struct sockaddr) || len < *buf)
+ return (EINVAL);
+
+ switch (SA(buf)->sa_family) {
+ case AF_INET6: {
+ struct sockaddr_in6 *sa6 = SIN6(buf);
+
+ if (sa6->sin6_len != sizeof (struct sockaddr_in6))
+ return (EINVAL);
+
+ if (IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr) ||
+ IN6_IS_ADDR_MULTICAST(&sa6->sin6_addr)) {
+ return (EINVAL);
+ }
+ if ((error = sa6_embedscope(sa6, ip6_use_defzone))
+ != 0) {
+ return (error);
+ }
break;
}
+ case AF_LINK: /* should eventually be supported */
+ default:
+ return (EAFNOSUPPORT);
+ }
- case IPV6_DSTOPTS:
- {
- struct ip6_dest *dest, **newdest;
- int destlen;
-
- if (cm->cmsg_len < CMSG_LEN(sizeof(struct ip6_dest)))
- return(EINVAL);
- dest = (struct ip6_dest *)CMSG_DATA(cm);
- destlen = (dest->ip6d_len + 1) << 3;
- if (cm->cmsg_len != CMSG_LEN(destlen))
- return(EINVAL);
-
- /*
- * The old advacned API is ambiguous on this
- * point. Our approach is to determine the
- * position based according to the existence
- * of a routing header. Note, however, that
- * this depends on the order of the extension
- * headers in the ancillary data; the 1st part
- * of the destination options header must
- * appear before the routing header in the
- * ancillary data, too.
- * RFC2292bis solved the ambiguity by
- * introducing separate cmsg types.
+ /* turn off the previous option, then set the new option. */
+ ip6_clearpktopts(opt, IPV6_NEXTHOP);
+ opt->ip6po_nexthop = _MALLOC(*buf, M_IP6OPT, M_NOWAIT);
+ if (opt->ip6po_nexthop == NULL)
+ return (ENOBUFS);
+ bcopy(buf, opt->ip6po_nexthop, *buf);
+ break;
+
+ case IPV6_2292HOPOPTS:
+ case IPV6_HOPOPTS: {
+ struct ip6_hbh *hbh;
+ int hbhlen;
+
+ /*
+ * XXX: We don't allow a non-privileged user to set ANY HbH
+ * options, since per-option restriction has too much
+ * overhead.
+ */
+ error = suser(kauth_cred_get(), 0);
+ if (error)
+ return (EACCES);
+
+ if (len == 0) {
+ ip6_clearpktopts(opt, IPV6_HOPOPTS);
+ break; /* just remove the option */
+ }
+
+ /* message length validation */
+ if (len < sizeof (struct ip6_hbh))
+ return (EINVAL);
+ hbh = (struct ip6_hbh *)(void *)buf;
+ hbhlen = (hbh->ip6h_len + 1) << 3;
+ if (len != hbhlen)
+ return (EINVAL);
+
+ /* turn off the previous option, then set the new option. */
+ ip6_clearpktopts(opt, IPV6_HOPOPTS);
+ opt->ip6po_hbh = _MALLOC(hbhlen, M_IP6OPT, M_NOWAIT);
+ if (opt->ip6po_hbh == NULL)
+ return (ENOBUFS);
+ bcopy(hbh, opt->ip6po_hbh, hbhlen);
+ capture_exthdrstat_out = TRUE;
+ break;
+ }
+
+ case IPV6_2292DSTOPTS:
+ case IPV6_DSTOPTS:
+ case IPV6_RTHDRDSTOPTS: {
+ struct ip6_dest *dest, **newdest = NULL;
+ int destlen;
+
+ error = suser(kauth_cred_get(), 0);
+ if (error)
+ return (EACCES);
+
+ if (len == 0) {
+ ip6_clearpktopts(opt, optname);
+ break; /* just remove the option */
+ }
+
+ /* message length validation */
+ if (len < sizeof (struct ip6_dest))
+ return (EINVAL);
+ dest = (struct ip6_dest *)(void *)buf;
+ destlen = (dest->ip6d_len + 1) << 3;
+ if (len != destlen)
+ return (EINVAL);
+
+ /*
+ * Determine the position that the destination options header
+ * should be inserted; before or after the routing header.
+ */
+ switch (optname) {
+ case IPV6_2292DSTOPTS:
+ /*
+ * The old advacned API is ambiguous on this point.
+ * Our approach is to determine the position based
+ * according to the existence of a routing header.
+ * Note, however, that this depends on the order of the
+ * extension headers in the ancillary data; the 1st
+ * part of the destination options header must appear
+ * before the routing header in the ancillary data,
+ * too.
+ * RFC3542 solved the ambiguity by introducing
+ * separate ancillary data or option types.
*/
if (opt->ip6po_rthdr == NULL)
newdest = &opt->ip6po_dest1;
else
newdest = &opt->ip6po_dest2;
+ break;
+ case IPV6_RTHDRDSTOPTS:
+ newdest = &opt->ip6po_dest1;
+ break;
+ case IPV6_DSTOPTS:
+ newdest = &opt->ip6po_dest2;
+ break;
+ }
+
+ /* turn off the previous option, then set the new option. */
+ ip6_clearpktopts(opt, optname);
+ *newdest = _MALLOC(destlen, M_IP6OPT, M_NOWAIT);
+ if (*newdest == NULL)
+ return (ENOBUFS);
+ bcopy(dest, *newdest, destlen);
+ capture_exthdrstat_out = TRUE;
+ break;
+ }
+
+ case IPV6_2292RTHDR:
+ case IPV6_RTHDR: {
+ struct ip6_rthdr *rth;
+ int rthlen;
- if (needcopy) {
- *newdest = _MALLOC(destlen, M_IP6OPT, M_WAITOK);
- bcopy(dest, *newdest, destlen);
- } else
- *newdest = dest;
+ if (len == 0) {
+ ip6_clearpktopts(opt, IPV6_RTHDR);
+ break; /* just remove the option */
+ }
+
+ /* message length validation */
+ if (len < sizeof (struct ip6_rthdr))
+ return (EINVAL);
+ rth = (struct ip6_rthdr *)(void *)buf;
+ rthlen = (rth->ip6r_len + 1) << 3;
+ if (len != rthlen)
+ return (EINVAL);
+ switch (rth->ip6r_type) {
+ case IPV6_RTHDR_TYPE_0:
+ if (rth->ip6r_len == 0) /* must contain one addr */
+ return (EINVAL);
+ if (rth->ip6r_len % 2) /* length must be even */
+ return (EINVAL);
+ if (rth->ip6r_len / 2 != rth->ip6r_segleft)
+ return (EINVAL);
break;
+ default:
+ return (EINVAL); /* not supported */
}
- case IPV6_RTHDR:
- {
- struct ip6_rthdr *rth;
- int rthlen;
-
- if (cm->cmsg_len < CMSG_LEN(sizeof(struct ip6_rthdr)))
- return(EINVAL);
- rth = (struct ip6_rthdr *)CMSG_DATA(cm);
- rthlen = (rth->ip6r_len + 1) << 3;
- if (cm->cmsg_len != CMSG_LEN(rthlen))
- return(EINVAL);
-
- switch (rth->ip6r_type) {
- case IPV6_RTHDR_TYPE_0:
- /* must contain one addr */
- if (rth->ip6r_len == 0)
- return(EINVAL);
- /* length must be even */
- if (rth->ip6r_len % 2)
- return(EINVAL);
- if (rth->ip6r_len / 2 != rth->ip6r_segleft)
- return(EINVAL);
- break;
- default:
- return(EINVAL); /* not supported */
- }
+ /* turn off the previous option */
+ ip6_clearpktopts(opt, IPV6_RTHDR);
+ opt->ip6po_rthdr = _MALLOC(rthlen, M_IP6OPT, M_NOWAIT);
+ if (opt->ip6po_rthdr == NULL)
+ return (ENOBUFS);
+ bcopy(rth, opt->ip6po_rthdr, rthlen);
+ capture_exthdrstat_out = TRUE;
+ break;
+ }
+
+ case IPV6_USE_MIN_MTU:
+ if (len != sizeof (int))
+ return (EINVAL);
+ minmtupolicy = *(int *)(void *)buf;
+ if (minmtupolicy != IP6PO_MINMTU_MCASTONLY &&
+ minmtupolicy != IP6PO_MINMTU_DISABLE &&
+ minmtupolicy != IP6PO_MINMTU_ALL) {
+ return (EINVAL);
+ }
+ opt->ip6po_minmtu = minmtupolicy;
+ break;
- if (needcopy) {
- opt->ip6po_rthdr = _MALLOC(rthlen, M_IP6OPT,
- M_WAITOK);
- bcopy(rth, opt->ip6po_rthdr, rthlen);
- } else
- opt->ip6po_rthdr = rth;
+ case IPV6_DONTFRAG:
+ if (len != sizeof (int))
+ return (EINVAL);
- break;
+ if (uproto == IPPROTO_TCP || *(int *)(void *)buf == 0) {
+ /*
+ * we ignore this option for TCP sockets.
+ * (RFC3542 leaves this case unspecified.)
+ */
+ opt->ip6po_flags &= ~IP6PO_DONTFRAG;
+ } else {
+ opt->ip6po_flags |= IP6PO_DONTFRAG;
}
+ break;
- default:
- return(ENOPROTOOPT);
+ case IPV6_PREFER_TEMPADDR:
+ if (len != sizeof (int))
+ return (EINVAL);
+ preftemp = *(int *)(void *)buf;
+ if (preftemp != IP6PO_TEMPADDR_SYSTEM &&
+ preftemp != IP6PO_TEMPADDR_NOTPREFER &&
+ preftemp != IP6PO_TEMPADDR_PREFER) {
+ return (EINVAL);
+ }
+ opt->ip6po_prefer_tempaddr = preftemp;
+ break;
+
+ default:
+ return (ENOPROTOOPT);
+ } /* end of switch */
+
+ if (capture_exthdrstat_out) {
+ if (uproto == IPPROTO_TCP) {
+ INC_ATOMIC_INT64_LIM(net_api_stats.nas_sock_inet6_stream_exthdr_out);
+ } else if (uproto == IPPROTO_UDP) {
+ INC_ATOMIC_INT64_LIM(net_api_stats.nas_sock_inet6_dgram_exthdr_out);
}
}
- return(0);
+ return (0);
}
/*
* pointer that might NOT be &loif -- easier than replicating that code here.
*/
void
-ip6_mloopback(
- struct ifnet *ifp,
- struct mbuf *m,
- struct sockaddr_in6 *dst)
+ip6_mloopback(struct ifnet *srcifp, struct ifnet *origifp, struct mbuf *m,
+ struct sockaddr_in6 *dst, uint32_t optlen, int32_t nxt0)
{
struct mbuf *copym;
struct ip6_hdr *ip6;
+ struct in6_addr src;
- copym = m_copy(m, 0, M_COPYALL);
- if (copym == NULL)
+ if (lo_ifp == NULL)
return;
/*
+ * Copy the packet header as it's needed for the checksum.
* Make sure to deep-copy IPv6 header portion in case the data
* is in an mbuf cluster, so that we can safely override the IPv6
* header portion later.
*/
- if ((copym->m_flags & M_EXT) != 0 ||
- copym->m_len < sizeof(struct ip6_hdr)) {
- copym = m_pullup(copym, sizeof(struct ip6_hdr));
- if (copym == NULL)
- return;
- }
+ copym = m_copym_mode(m, 0, M_COPYALL, M_DONTWAIT, M_COPYM_COPY_HDR);
+ if (copym != NULL && ((copym->m_flags & M_EXT) ||
+ copym->m_len < sizeof (struct ip6_hdr)))
+ copym = m_pullup(copym, sizeof (struct ip6_hdr));
-#if DIAGNOSTIC
- if (copym->m_len < sizeof(*ip6)) {
- m_freem(copym);
+ if (copym == NULL)
return;
- }
-#endif
ip6 = mtod(copym, struct ip6_hdr *);
-#ifndef SCOPEDROUTING
+ src = ip6->ip6_src;
/*
* clear embedded scope identifiers if necessary.
* in6_clearscope will touch the addresses only when necessary.
*/
in6_clearscope(&ip6->ip6_src);
in6_clearscope(&ip6->ip6_dst);
-#endif
-#ifdef __APPLE__
+ if (copym->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA)
+ in6_delayed_cksum_offset(copym, 0, optlen, nxt0);
- /* Makes sure the HW checksum flags are cleaned before sending the packet */
+ /*
+ * Stuff the 'real' ifp into the pkthdr, to be used in matching
+ * in ip6_input(); we need the loopback ifp/dl_tag passed as args
+ * to make the loopback driver compliant with the data link
+ * requirements.
+ */
+ copym->m_pkthdr.rcvif = origifp;
- copym->m_pkthdr.rcvif = 0;
- copym->m_pkthdr.csum_data = 0;
- copym->m_pkthdr.csum_flags = 0;
+ /*
+ * Also record the source interface (which owns the source address).
+ * This is basically a stripped down version of ifa_foraddr6().
+ */
+ if (srcifp == NULL) {
+ struct in6_ifaddr *ia;
+
+ lck_rw_lock_shared(&in6_ifaddr_rwlock);
+ for (ia = in6_ifaddrs; ia != NULL; ia = ia->ia_next) {
+ IFA_LOCK_SPIN(&ia->ia_ifa);
+ /* compare against src addr with embedded scope */
+ if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, &src)) {
+ srcifp = ia->ia_ifp;
+ IFA_UNLOCK(&ia->ia_ifa);
+ break;
+ }
+ IFA_UNLOCK(&ia->ia_ifa);
+ }
+ lck_rw_done(&in6_ifaddr_rwlock);
+ }
+ if (srcifp != NULL)
+ ip6_setsrcifaddr_info(copym, srcifp->if_index, NULL);
+ ip6_setdstifaddr_info(copym, origifp->if_index, NULL);
- if (lo_ifp) {
- copym->m_pkthdr.rcvif = ifp;
- lck_mtx_unlock(ip6_mutex);
- dlil_output(lo_ifp, PF_INET6, copym, 0, (struct sockaddr *)dst, 0);
- lck_mtx_lock(ip6_mutex);
- } else
- m_free(copym);
-#else
- (void)if_simloop(ifp, copym, dst->sin6_family, NULL);
-#endif
+ dlil_output(lo_ifp, PF_INET6, copym, NULL, SA(dst), 0, NULL);
}
/*
* Chop IPv6 header off from the payload.
*/
static int
-ip6_splithdr(m, exthdrs)
- struct mbuf *m;
- struct ip6_exthdrs *exthdrs;
+ip6_splithdr(struct mbuf *m, struct ip6_exthdrs *exthdrs)
{
struct mbuf *mh;
struct ip6_hdr *ip6;
ip6 = mtod(m, struct ip6_hdr *);
- if (m->m_len > sizeof(*ip6)) {
- MGETHDR(mh, M_DONTWAIT, MT_HEADER);
- if (mh == 0) {
+ if (m->m_len > sizeof (*ip6)) {
+ MGETHDR(mh, M_DONTWAIT, MT_HEADER); /* MAC-OK */
+ if (mh == NULL) {
m_freem(m);
- return ENOBUFS;
+ return (ENOBUFS);
}
M_COPY_PKTHDR(mh, m);
- MH_ALIGN(mh, sizeof(*ip6));
+ MH_ALIGN(mh, sizeof (*ip6));
m->m_flags &= ~M_PKTHDR;
- m->m_len -= sizeof(*ip6);
- m->m_data += sizeof(*ip6);
+ m->m_len -= sizeof (*ip6);
+ m->m_data += sizeof (*ip6);
mh->m_next = m;
m = mh;
- m->m_len = sizeof(*ip6);
- bcopy((caddr_t)ip6, mtod(m, caddr_t), sizeof(*ip6));
+ m->m_len = sizeof (*ip6);
+ bcopy((caddr_t)ip6, mtod(m, caddr_t), sizeof (*ip6));
}
exthdrs->ip6e_ip6 = m;
- return 0;
+ return (0);
+}
+
+static void
+ip6_output_checksum(struct ifnet *ifp, uint32_t mtu, struct mbuf *m,
+ int nxt0, uint32_t tlen, uint32_t optlen)
+{
+ uint32_t sw_csum, hwcap = ifp->if_hwassist;
+ int tso = TSO_IPV6_OK(ifp, m);
+
+ if (!hwcksum_tx) {
+ /* do all in software; checksum offload is disabled */
+ sw_csum = CSUM_DELAY_IPV6_DATA & m->m_pkthdr.csum_flags;
+ } else {
+ /* do in software what the hardware cannot */
+ sw_csum = m->m_pkthdr.csum_flags &
+ ~IF_HWASSIST_CSUM_FLAGS(hwcap);
+ }
+
+ if (optlen != 0) {
+ sw_csum |= (CSUM_DELAY_IPV6_DATA &
+ m->m_pkthdr.csum_flags);
+ } else if (!(sw_csum & CSUM_DELAY_IPV6_DATA) &&
+ (hwcap & CSUM_PARTIAL)) {
+ /*
+ * Partial checksum offload, ere), if no extension headers,
+ * and TCP only (no UDP support, as the hardware may not be
+ * able to convert +0 to -0 (0xffff) per RFC1122 4.1.3.4.
+ * unless the interface supports "invert zero" capability.)
+ */
+ if (hwcksum_tx && !tso &&
+ ((m->m_pkthdr.csum_flags & CSUM_TCPIPV6) ||
+ ((hwcap & CSUM_ZERO_INVERT) &&
+ (m->m_pkthdr.csum_flags & CSUM_ZERO_INVERT))) &&
+ tlen <= mtu) {
+ uint16_t start = sizeof (struct ip6_hdr);
+ uint16_t ulpoff =
+ m->m_pkthdr.csum_data & 0xffff;
+ m->m_pkthdr.csum_flags |=
+ (CSUM_DATA_VALID | CSUM_PARTIAL);
+ m->m_pkthdr.csum_tx_stuff = (ulpoff + start);
+ m->m_pkthdr.csum_tx_start = start;
+ sw_csum = 0;
+ } else {
+ sw_csum |= (CSUM_DELAY_IPV6_DATA &
+ m->m_pkthdr.csum_flags);
+ }
+ }
+
+ if (sw_csum & CSUM_DELAY_IPV6_DATA) {
+ in6_delayed_cksum_offset(m, 0, optlen, nxt0);
+ sw_csum &= ~CSUM_DELAY_IPV6_DATA;
+ }
+
+ if (hwcksum_tx) {
+ /*
+ * Drop off bits that aren't supported by hardware;
+ * also make sure to preserve non-checksum related bits.
+ */
+ m->m_pkthdr.csum_flags =
+ ((m->m_pkthdr.csum_flags &
+ (IF_HWASSIST_CSUM_FLAGS(hwcap) | CSUM_DATA_VALID)) |
+ (m->m_pkthdr.csum_flags & ~IF_HWASSIST_CSUM_MASK));
+ } else {
+ /* drop all bits; checksum offload is disabled */
+ m->m_pkthdr.csum_flags = 0;
+ }
}
/*
* Compute IPv6 extension header length.
*/
int
-ip6_optlen(in6p)
- struct in6pcb *in6p;
+ip6_optlen(struct in6pcb *in6p)
{
int len;
if (!in6p->in6p_outputopts)
- return 0;
+ return (0);
len = 0;
-#define elen(x) \
- (((struct ip6_ext *)(x)) ? (((struct ip6_ext *)(x))->ip6e_len + 1) << 3 : 0)
+#define elen(x) \
+ (((struct ip6_ext *)(x)) ? \
+ (((struct ip6_ext *)(x))->ip6e_len + 1) << 3 : 0)
len += elen(in6p->in6p_outputopts->ip6po_hbh);
- if (in6p->in6p_outputopts->ip6po_rthdr)
+ if (in6p->in6p_outputopts->ip6po_rthdr) {
/* dest1 is valid with rthdr only */
len += elen(in6p->in6p_outputopts->ip6po_dest1);
+ }
len += elen(in6p->in6p_outputopts->ip6po_rthdr);
len += elen(in6p->in6p_outputopts->ip6po_dest2);
- return len;
+ return (len);
#undef elen
}
+
+static int
+sysctl_reset_ip6_output_stats SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int error, i;
+
+ i = ip6_output_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_output_measure != i && i == 1) {
+ net_perf_initialize(&net_perf, ip6_output_measure_bins);
+ }
+ ip6_output_measure = i;
+done:
+ return (error);
+}
+
+static int
+sysctl_ip6_output_measure_bins SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int error;
+ uint64_t i;
+
+ i = ip6_output_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_output_measure_bins = i;
+done:
+ return (error);
+}
+
+static int
+sysctl_ip6_output_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