+/*
+ * Copyright (c) 2000-2011 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@
+ */
+
/* $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 $ */
#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 <pexpert/pexpert.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/ip_var.h>
#include <netinet6/in6_var.h>
#include <netinet/ip6.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>
+#include <mach/sdt.h>
#if IPSEC
#include <netinet6/ipsec.h>
#include <netkey/key.h>
extern int ipsec_bypass;
#endif /* IPSEC */
-extern lck_mtx_t *nd6_mutex;
#if CONFIG_MACF_NET
#include <security/mac.h>
#include <netinet/kpi_ipfilter_var.h>
+#if PF
+#include <net/pfvar.h>
+#endif /* PF */
+
#ifndef __APPLE__
static MALLOC_DEFINE(M_IPMOPTS, "ip6_moptions", "internet multicast options");
#endif
-
-extern u_long route_generation;
-
struct ip6_exthdrs {
struct mbuf *ip6e_ip6;
struct mbuf *ip6e_hbh;
struct mbuf *ip6e_dest2;
};
+int ip6_raw_ctloutput(struct socket *so, struct sockopt *sopt);
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 ip6_pcbopt(int optname, u_char *buf, int len, struct ip6_pktopts **pktopt, int uproto);
+static int ip6_getpcbopt(struct ip6_pktopts *pktopt, int optname, struct sockopt *sopt);
+static int ip6_setpktopt(int optname, u_char *buf, int len, struct ip6_pktopts *opt, int sticky, int cmsg, int uproto);
+static void im6o_trace(struct ip6_moptions *, int);
static int ip6_copyexthdr(struct mbuf **, caddr_t, int);
static int ip6_insertfraghdr(struct mbuf *, struct mbuf *, int,
struct ip6_frag **);
static int ip6_insert_jumboopt(struct ip6_exthdrs *, u_int32_t);
static int ip6_splithdr(struct mbuf *, struct ip6_exthdrs *);
+static int ip6_getpmtu (struct route_in6 *, struct route_in6 *,
+ struct ifnet *, struct in6_addr *, u_int32_t *, int *);
+
+#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 */
+
+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 */
-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;
/*
* IP6 output. The packet in mbuf chain m contains a skeletal IP6
* 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,
+ * 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
int flags,
struct ip6_moptions *im6o,
struct ifnet **ifpp, /* XXX: just for statistics */
- int locked)
+ struct ip6_out_args *ip6oa)
{
struct ip6_hdr *ip6, *mhip6;
- struct ifnet *ifp, *origifp;
+ struct ifnet *ifp = NULL, *origifp = NULL;
struct mbuf *m = m0;
int hlen, tlen, len, off;
struct route_in6 ip6route;
- struct sockaddr_in6 *dst;
+ struct rtentry *rt = NULL;
+ struct sockaddr_in6 *dst, src_sa, dst_sa;
int error = 0;
struct in6_ifaddr *ia = NULL;
- u_long mtu;
+ u_int32_t mtu;
+ int alwaysfrag = 0, dontfrag = 0;
u_int32_t optlen = 0, plen = 0, unfragpartlen = 0;
struct ip6_exthdrs exthdrs;
- struct in6_addr finaldst;
+ struct in6_addr finaldst, src0, dst0;
+ u_int32_t zone;
struct route_in6 *ro_pmtu = NULL;
int hdrsplit = 0;
int needipsec = 0;
ipfilter_t inject_filter_ref;
-
+ int tso;
+ unsigned int ifscope;
+ unsigned int nocell;
+ boolean_t select_srcif;
+ struct ipf_pktopts *ippo = NULL, ipf_pktopts;
+ u_int32_t ifmtu;
+
#if IPSEC
int needipsectun = 0;
struct socket *so = NULL;
struct secpolicy *sp = NULL;
+ struct route_in6 *ipsec_saved_route = NULL;
+ struct ipsec_output_state ipsec_state;
- if (!locked)
- lck_mtx_lock(ip6_mutex);
+ bzero(&ipsec_state, sizeof(ipsec_state));
+
/* for AH processing. stupid to have "socket" variable in IP layer... */
if (ipsec_bypass == 0)
{
}
#endif /* IPSEC */
+ bzero(&ipf_pktopts, sizeof(struct ipf_pktopts));
+ ippo = &ipf_pktopts;
+
ip6 = mtod(m, struct ip6_hdr *);
inject_filter_ref = ipf_get_inject_filter(m);
+
+ finaldst = ip6->ip6_dst;
+
+ if (ip6_doscopedroute && (flags & IPV6_OUTARGS)) {
+ select_srcif = !(flags & (IPV6_FORWARDING | IPV6_UNSPECSRC | IPV6_FLAG_NOSRCIFSEL));
+ ifscope = ip6oa->ip6oa_boundif;
+ ipf_pktopts.ippo_flags = IPPOF_BOUND_IF;
+ ipf_pktopts.ippo_flags |= (ifscope << IPPOF_SHIFT_IFSCOPE);
+ } else {
+ select_srcif = FALSE;
+ ifscope = IFSCOPE_NONE;
+ }
+
+ if (flags & IPV6_OUTARGS) {
+ nocell = ip6oa->ip6oa_nocell;
+ if (nocell)
+ ipf_pktopts.ippo_flags |= IPPOF_NO_IFT_CELLULAR;
+ } else {
+ nocell = 0;
+ }
#define MAKE_EXTHDR(hp, mp) \
do { \
/* 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) */
* 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;
+ 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);
+
/* 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)
+ optlen += exthdrs.ip6e_dest2->m_len;
+
+
+ if (needipsec &&
+ (m->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA) != 0) {
+ in6_delayed_cksum(m, sizeof(struct ip6_hdr) + optlen);
+ m->m_pkthdr.csum_flags &= ~CSUM_DELAY_IPV6_DATA;
+ }
/*
* If we need IPsec, or there is at least one extension header,
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_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 */
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) {
/*
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;
}
}
}
ipf_unref();
- lck_mtx_lock(ip6_mutex);
}
ip6 = mtod(m, struct ip6_hdr *);
/* Hack: cleanup embedded scope_id if we put it there */
{
struct ip6_rthdr *rh = NULL;
int segleft_org = 0;
- struct ipsec_output_state state;
if (exthdrs.ip6e_rthdr) {
rh = mtod(exthdrs.ip6e_rthdr, struct ip6_rthdr *);
rh->ip6r_segleft = 0;
}
- bzero(&state, sizeof(state));
- state.m = m;
- lck_mtx_unlock(ip6_mutex);
- error = ipsec6_output_trans(&state, nexthdrp, mprev, sp, flags,
+ ipsec_state.m = m;
+ error = ipsec6_output_trans(&ipsec_state, nexthdrp, mprev, sp, flags,
&needipsectun);
- lck_mtx_lock(ip6_mutex);
- m = state.m;
+ m = ipsec_state.m;
if (error) {
/* mbuf is already reclaimed in ipsec6_output_trans. */
m = NULL;
/* ah6_output doesn't modify mbuf chain */
rh->ip6r_segleft = segleft_org;
}
- }
-skip_ipsec2:;
-#endif
+ }
}
+skip_ipsec2:
+#endif
/*
- * 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 *)(mtod(exthdrs.ip6e_rthdr,
struct ip6_rthdr *));
struct ip6_rthdr0 *rh0;
+ struct in6_addr *addr;
+ struct sockaddr_in6 sa;
- finaldst = ip6->ip6_dst;
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;
+ addr = (struct in6_addr *)(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;
/* Source address validation */
if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src) &&
- (flags & IPV6_DADOUTPUT) == 0) {
+ (flags & IPV6_UNSPECSRC) == 0) {
error = EOPNOTSUPP;
ip6stat.ip6s_badscope++;
goto bad;
if (opt && opt->ip6po_rthdr)
ro = &opt->ip6po_route;
dst = (struct sockaddr_in6 *)&ro->ro_dst;
+
+ if (ro && ro->ro_rt)
+ RT_LOCK_ASSERT_NOTHELD(ro->ro_rt);
+ /*
+ * 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 (opt && 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.
+ * 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 (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)) {
+ if (ro->ro_rt != NULL && (!(ro->ro_rt->rt_flags & RTF_UP) ||
+ 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;
+ ro->ro_rt = NULL;
}
- if (ro->ro_rt == 0) {
+ if (ro->ro_rt == NULL) {
bzero(dst, sizeof(*dst));
dst->sin6_family = AF_INET6;
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;
- int tunneledv4 = 0;
-
+#if CONFIG_DTRACE
+ struct ifnet *trace_ifp = (ifpp != NULL) ? (*ifpp) : NULL;
+#endif /* CONFIG_DTRACE */
/*
* All the extension headers will become inaccessible
* (since they can be encrypted).
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);
- error = ipsec6_output_tunnel(&state, sp, flags, &tunneledv4);
- lck_mtx_lock(ip6_mutex);
- if (tunneledv4) /* tunneled in IPv4 - packet is gone */
+ ipsec_state.m = m;
+ route_copyout(&ipsec_state.ro, (struct route *)ro, sizeof(ipsec_state.ro));
+ ipsec_state.dst = (struct sockaddr *)dst;
+
+ /* Added a trace here so that we can see packets inside a 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);
+ if (ipsec_state.tunneled == 4) /* tunneled in IPv4 - packet is gone */
goto done;
- m = state.m;
- ro = (struct route_in6 *)state.ro;
- dst = (struct sockaddr_in6 *)state.dst;
+ m = ipsec_state.m;
+ ipsec_saved_route = ro;
+ ro = (struct route_in6 *)&ipsec_state.ro;
+ dst = (struct sockaddr_in6 *)ipsec_state.dst;
if (error) {
/* mbuf is already reclaimed in ipsec6_output_tunnel. */
m0 = m = NULL;
}
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.
+ */
+ ifscope = IFSCOPE_NONE;
+ 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 */
+ /* for safety */
+ if (ifp != NULL) {
+ ifnet_release(ifp);
+ ifp = NULL;
+ }
- in6_ifstat_inc(ifp, ifs6_out_request);
+ /* adjust pointer */
+ ip6 = mtod(m, struct ip6_hdr *);
+ if (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;
+
+ if ((error = in6_selectroute(select_srcif ? &src_sa : NULL,
+ &dst_sa, opt, im6o, ro, &ifp, &rt, 0, ifscope, nocell)) != 0) {
+ switch (error) {
+ case EHOSTUNREACH:
+ ip6stat.ip6s_noroute++;
+ break;
+ case EADDRNOTAVAIL:
+ default:
+ break; /* XXX statistics? */
+ }
+ if (ifp != NULL)
+ in6_ifstat_inc(ifp, ifs6_out_discard);
+ goto bad;
+ }
+ if (rt == NULL) {
/*
- * 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 in6_selectroute() does not return a route entry,
+ * dst may not have been updated.
*/
- if (opt && opt->ip6po_pktinfo
- && opt->ip6po_pktinfo->ipi6_ifindex) {
- if (!(ifp->if_flags & IFF_LOOPBACK)
- && ifp->if_index != opt->ip6po_pktinfo->ipi6_ifindex) {
- ip6stat.ip6s_noroute++;
- in6_ifstat_inc(ifp, ifs6_out_discard);
- error = EHOSTUNREACH;
- goto bad;
- }
- }
+ *dst = dst_sa; /* XXX */
+ }
- if (opt && opt->ip6po_hlim != -1)
- ip6->ip6_hlim = opt->ip6po_hlim & 0xff;
- } else {
- /* Multicast */
- struct in6_multi *in6m;
+ /*
+ * then rt (for unicast) and ifp must be non-NULL valid values.
+ */
+ if ((flags & IPV6_FORWARDING) == 0) {
+ /* XXX: the FORWARDING flag can be set for mrouting. */
+ in6_ifstat_inc(ifp, ifs6_out_request);
+ }
+ if (rt != NULL) {
+ RT_LOCK(rt);
+ ia = (struct in6_ifaddr *)(rt->rt_ifa);
+ if (ia != NULL)
+ IFA_ADDREF(&ia->ia_ifa);
+ rt->rt_use++;
+ RT_UNLOCK(rt);
+ }
- m->m_flags = (m->m_flags & ~M_BCAST) | M_MCAST;
+ /*
+ * The outgoing interface must be in the zone of source and
+ * destination addresses. 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);
+ if (origifp != NULL)
+ ifnet_release(origifp);
+ origifp = ia->ia_ifp;
+ } else {
+ if (ifp != NULL)
+ ifnet_reference(ifp);
+ if (origifp != NULL)
+ ifnet_release(origifp);
+ origifp = ifp;
+ }
+ 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) || 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) || zone != dst_sa.sin6_scope_id) {
+ goto badscope;
+ }
- /*
- * See if the caller provided any multicast options
- */
- 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;
+ /* scope check is done. */
+ goto routefound;
- /*
- * 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];
+ badscope:
+ ip6stat.ip6s_badscope++;
+ in6_ifstat_inc(origifp, ifs6_out_discard);
+ if (error == 0)
+ error = EHOSTUNREACH; /* XXX */
+ goto bad;
- /*
- * 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)) {
+ routefound:
+ if (rt && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ if (opt && opt->ip6po_nextroute.ro_rt) {
/*
- * If the outgoing interface is already specified,
- * it should be a loopback interface.
+ * The nexthop is explicitly specified by the
+ * application. We assume the next hop is an IPv6
+ * address.
*/
- 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 = lo_ifp;
- }
+ dst = (struct sockaddr_in6 *)opt->ip6po_nexthop;
}
+ else if ((rt->rt_flags & RTF_GATEWAY))
+ dst = (struct sockaddr_in6 *)rt->rt_gateway;
+ }
- if (opt && opt->ip6po_hlim != -1)
- ip6->ip6_hlim = opt->ip6po_hlim & 0xff;
+ if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ m->m_flags &= ~(M_BCAST | M_MCAST); /* just in case */
+ } else {
+ struct in6_multi *in6m;
- /*
- * 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).
- */
- 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);
- }
+ m->m_flags = (m->m_flags & ~M_BCAST) | M_MCAST;
- if ((flags & IPV6_FORWARDING) == 0)
- in6_ifstat_inc(ifp, ifs6_out_request);
in6_ifstat_inc(ifp, ifs6_out_mcast);
/*
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)) {
+ if (im6o != NULL)
+ IM6O_UNLOCK(im6o);
/*
* If we belong to the destination multicast group
* on the outgoing interface, and the caller did not
*/
ip6_mloopback(ifp, m, dst);
} else {
+ if (im6o != NULL)
+ IM6O_UNLOCK(im6o);
/*
* If we are acting as a multicast router, perform
* multicast forwarding as if the packet had just
* above, will be forwarded by the ip6_input() routine,
* if necessary.
*/
+#if MROUTING
if (ip6_mrouter && (flags & IPV6_FORWARDING) == 0) {
+ /*
+ * XXX: ip6_mforward expects that rcvif is NULL
+ * when it is called from the originating path.
+ * However, it is not always the case, since
+ * some versions of MGETHDR() does not
+ * initialize the field.
+ */
+ m->m_pkthdr.rcvif = NULL;
if (ip6_mforward(ip6, ifp, m) != 0) {
m_freem(m);
+ if (in6m != NULL)
+ IN6M_REMREF(in6m);
goto done;
}
}
+#endif
}
+ 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)) {
+ if (ip6->ip6_hlim == 0 || (ifp->if_flags & IFF_LOOPBACK) ||
+ IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst)) {
m_freem(m);
goto done;
}
* Fill the outgoing inteface to tell the upper layer
* to increment per-interface statistics.
*/
- if (ifpp)
+ if (ifpp != NULL) {
+ ifnet_reference(ifp); /* for caller */
+ if (*ifpp != NULL)
+ ifnet_release(*ifpp);
*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 = IN6_LINKMTU(ifp);
- 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 = IN6_LINKMTU(ifp);
- }
+ /* 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
+#if IPFW2
/*
* Check with the firewall...
*/
goto done;
}
}
+#endif
/*
* If the outgoing packet contains a hop-by-hop options header,
*/
if (exthdrs.ip6e_hbh) {
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 */
#if DIAGNOSTIC
if ((hbh->ip6h_len + 1) << 3 > exthdrs.ip6e_hbh->m_len)
*/
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) {
+ if (ip6_process_hopopts(m, (u_int8_t *)(hbh + 1),
+ ((hbh->ip6h_len + 1) << 3) - sizeof(struct ip6_hbh),
+ &dummy, &plen) < 0) {
/* m was already freed at this point */
error = EINVAL;/* better error? */
goto done;
m->m_pkthdr.rcvif = NULL;
}
+#if PF
+ if (PF_IS_ENABLED) {
+ /* Invoke outbound packet filter */
+ error = pf_af_hook(ifp, NULL, &m, AF_INET6, FALSE);
+
+ if (error) {
+ if (m != NULL) {
+ panic("%s: unexpected packet %p\n", __func__, m);
+ /* NOTREACHED */
+ }
+ /* Already freed by callee */
+ goto done;
+ }
+ ip6 = mtod(m, struct ip6_hdr *);
+ }
+#endif /* PF */
+
/*
* Send the packet to the outgoing interface.
* If necessary, do IPv6 fragmentation before sending.
+ *
+ * the logic here 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
*/
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
- }
+
+ if (opt && (opt->ip6po_flags & IP6PO_DONTFRAG))
+ dontfrag = 1;
+ else
+ dontfrag = 0;
+ if (dontfrag && alwaysfrag) { /* case 4 */
+ /* conflicting request - can't transmit */
+ error = EMSGSIZE;
+ goto bad;
+ }
+
+ lck_rw_lock_shared(nd_if_rwlock);
+ ifmtu = IN6_LINKMTU(ifp);
+ lck_rw_done(nd_if_rwlock);
+
+ if (dontfrag && tlen > ifmtu) { /* 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, (struct sockaddr *)&ro_pmtu->ro_dst,
+ (void *)&ip6cp);
+
+ error = EMSGSIZE;
+ goto bad;
+ }
+
+ /*
+ * transmit packet without fragmentation
+ */
+ tso = (ifp->if_hwassist & IFNET_TSO_IPV6) &&
+ (m->m_pkthdr.csum_flags & CSUM_TSO_IPV6);
+ if (dontfrag || (!alwaysfrag && /* case 1-a and 2-a */
+ (tlen <= mtu || tso || (ifp->if_hwassist & CSUM_FRAGMENT_IPV6)))) {
+ int sw_csum;
+
+ ip6 = mtod(m, struct ip6_hdr *);
#ifdef 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);
+ if (apple_hwcksum_tx == 0) /* Do not let HW handle cksum */
+ sw_csum = m->m_pkthdr.csum_flags;
+ else
+ sw_csum = m->m_pkthdr.csum_flags &
+ ~IF_HWASSIST_CSUM_FLAGS(ifp->if_hwassist);
+
+ if ((sw_csum & CSUM_DELAY_IPV6_DATA) != 0) {
+ in6_delayed_cksum(m, sizeof(struct ip6_hdr) + optlen);
+ m->m_pkthdr.csum_flags &= ~CSUM_DELAY_IPV6_DATA;
+ }
+ if (ro->ro_rt)
+ RT_LOCK_ASSERT_NOTHELD(ro->ro_rt);
+ error = nd6_output(ifp, origifp, m, dst, ro->ro_rt);
goto done;
- } else if (mtu < IPV6_MMTU) {
- /*
- * note that path MTU is never less than IPV6_MMTU
- * (see icmp6_input).
- */
+ }
+
+ /*
+ * try to fragment the packet. case 1-b and 3
+ */
+ if (mtu < IPV6_MMTU) {
+ /* path MTU cannot be less than IPV6_MMTU */
error = EMSGSIZE;
in6_ifstat_inc(ifp, ifs6_out_fragfail);
goto bad;
- } else if (ip6->ip6_plen == 0) { /* jumbo payload cannot be fragmented */
+ } else if (ip6->ip6_plen == 0) {
+ /* jumbo payload cannot be fragmented */
error = EMSGSIZE;
in6_ifstat_inc(ifp, ifs6_out_fragfail);
goto bad;
} else {
struct mbuf **mnext, *m_frgpart;
- struct ip6_frag *ip6f = NULL;
- u_int32_t id = htonl(ip6_id++);
+ struct ip6_frag *ip6f;
+ u_int32_t id = htonl(ip6_randomid());
u_char nextproto;
/*
ip6->ip6_nxt = IPPROTO_FRAGMENT;
}
+ if ((m->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA) != 0) {
+ in6_delayed_cksum(m, sizeof(struct ip6_hdr) + optlen);
+ m->m_pkthdr.csum_flags &= ~CSUM_DELAY_IPV6_DATA;
+ }
+
/*
* Loop through length of segment after first fragment,
* make new header and copy data of each part and link onto
/* 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);
+ error = nd6_output(ifp, origifp, m, dst, ro->ro_rt);
} else
m_freem(m);
ip6stat.ip6s_fragmented++;
done:
- if (!locked)
- lck_mtx_unlock(ip6_mutex);
+#if IPSEC
+ if (ipsec_saved_route) {
+ ro = ipsec_saved_route;
+ if (ipsec_state.ro.ro_rt) {
+ rtfree(ipsec_state.ro.ro_rt);
+ }
+ }
+#endif /* IPSEC */
if (ro == &ip6route && ro->ro_rt) { /* brace necessary for rtfree */
rtfree(ro->ro_rt);
- ro->ro_rt = NULL;
} else if (ro_pmtu == &ip6route && ro_pmtu->ro_rt) {
rtfree(ro_pmtu->ro_rt);
- ro_pmtu->ro_rt = NULL;
}
#if IPSEC
key_freesp(sp, KEY_SADB_UNLOCKED);
#endif /* IPSEC */
- return(error);
+ if (ia != NULL)
+ IFA_REMREF(&ia->ia_ifa);
+ if (ifp != NULL)
+ ifnet_release(ifp);
+ if (origifp != NULL)
+ ifnet_release(origifp);
+ return (error);
freehdrs:
m_freem(exthdrs.ip6e_hbh); /* m_freem will check if mbuf is 0 */
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
m_free(m);
- return(ENOBUFS);
+ return (ENOBUFS);
}
}
m->m_len = hlen;
bcopy(hdr, mtod(m, caddr_t), hlen);
*mp = m;
- return(0);
+ return (0);
}
+/*
+ * Process a delayed payload checksum calculation.
+ */
+void
+in6_delayed_cksum(struct mbuf *m, uint16_t offset)
+{
+ uint16_t csum;
+
+ csum = in6_cksum(m, 0, offset, m->m_pkthdr.len - offset);
+ if (csum == 0 && (m->m_pkthdr.csum_flags & CSUM_UDPIPV6) != 0) {
+ csum = 0xffff;
+ }
+
+ offset += (m->m_pkthdr.csum_data & 0xffff);
+ if ((offset + sizeof(csum)) > m->m_len) {
+ m_copyback(m, offset, sizeof(csum), &csum);
+ } else {
+ *(uint16_t *)(mtod(m, char *) + offset) = csum;
+ }
+}
/*
* Insert jumbo payload option.
*/
if (exthdrs->ip6e_hbh == 0) {
MGET(mopt, M_DONTWAIT, MT_DATA);
if (mopt == 0)
- return(ENOBUFS);
+ 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
}
}
if (!n)
- return(ENOBUFS);
+ return (ENOBUFS);
n->m_len = oldoptlen + JUMBOOPTLEN;
bcopy(mtod(mopt, caddr_t), mtod(n, caddr_t),
- oldoptlen);
- optbuf = (u_char *) (mtod(n, caddr_t) + oldoptlen);
+ oldoptlen);
+ optbuf = mtod(n, u_char *) + oldoptlen;
m_freem(mopt);
mopt = exthdrs->ip6e_hbh = n;
} else {
/* finally, adjust the packet header length */
exthdrs->ip6e_ip6->m_pkthdr.len += JUMBOOPTLEN;
- return(0);
+ return (0);
#undef JUMBOOPTLEN
}
if (hlen > sizeof(struct ip6_hdr)) {
n = m_copym(m0, sizeof(struct ip6_hdr),
- hlen - sizeof(struct ip6_hdr), M_DONTWAIT);
+ hlen - sizeof(struct ip6_hdr), M_DONTWAIT);
if (n == 0)
- return(ENOBUFS);
+ return (ENOBUFS);
m->m_next = n;
} else
n = m;
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);
+ *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 {
MGET(mfrg, M_DONTWAIT, MT_DATA);
if (mfrg == 0)
- return(ENOBUFS);
+ 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(void);
-
-/*
- * IP6 socket option processing.
- */
-int
-ip6_ctloutput(so, sopt)
- struct socket *so;
- struct sockopt *sopt;
+static int
+ip6_getpmtu(struct route_in6 *ro_pmtu, struct route_in6 *ro,
+ struct ifnet *ifp, struct in6_addr *dst, u_int32_t *mtup,
+ int *alwaysfragp)
{
- int privileged;
- struct inpcb *in6p = sotoinpcb(so);
- int error, optval;
- int level, op = -1, optname = 0;
- int optlen = 0;
- struct proc *p = NULL;
+ u_int32_t mtu = 0;
+ int alwaysfrag = 0;
+ int error = 0;
- 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;
+ if (ro_pmtu != ro) {
+ /* The first hop and the final destination may differ. */
+ struct sockaddr_in6 *sa6_dst =
+ (struct sockaddr_in6 *)&ro_pmtu->ro_dst;
+ if (ro_pmtu->ro_rt &&
+ ((ro_pmtu->ro_rt->rt_flags & RTF_UP) == 0 ||
+ ro_pmtu->ro_rt->generation_id != route_generation ||
+ !IN6_ARE_ADDR_EQUAL(&sa6_dst->sin6_addr, dst))) {
+ rtfree(ro_pmtu->ro_rt);
+ ro_pmtu->ro_rt = (struct rtentry *)NULL;
+ }
+ 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;
+
+ lck_rw_lock_shared(nd_if_rwlock);
+ ifmtu = IN6_LINKMTU(ifp);
+ lck_rw_done(nd_if_rwlock);
+
+ RT_LOCK_SPIN(ro_pmtu->ro_rt);
+ 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 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 = 1;
+ mtu = IPV6_MMTU;
+ }
+ RT_UNLOCK(ro_pmtu->ro_rt);
+ } else {
+ if (ifp) {
+ lck_rw_lock_shared(nd_if_rwlock);
+ mtu = IN6_LINKMTU(ifp);
+ lck_rw_done(nd_if_rwlock);
+ } else
+ error = EHOSTUNREACH; /* XXX */
}
- privileged = (p == 0 || proc_suser(p)) ? 0 : 1;
+ *mtup = mtu;
+ if (alwaysfragp)
+ *alwaysfragp = alwaysfrag;
+ return (error);
+}
+
+/*
+ * IP6 socket option processing.
+ */
+int
+ip6_ctloutput(so, sopt)
+ struct socket *so;
+ struct sockopt *sopt;
+{
+ int optdatalen, uproto;
+ void *optdata;
+ int privileged;
+ struct inpcb *in6p = sotoinpcb(so);
+ int error = 0, optval = 0;
+ int level, op = -1, optname = 0;
+ int optlen = 0;
+ struct proc *p;
+
+ if (sopt == NULL) {
+ panic("ip6_ctloutput: arg soopt is NULL");
+ /* NOTREACHED */
+ }
+ level = sopt->sopt_level;
+ op = sopt->sopt_dir;
+ optname = sopt->sopt_name;
+ optlen = sopt->sopt_valsize;
+ p = sopt->sopt_p;
+ uproto = (int)so->so_proto->pr_protocol;
+
+ privileged = (proc_suser(p) == 0);
if (level == IPPROTO_IPV6) {
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 != 0)
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_HOPLIMIT:
case IPV6_FAITH:
+ case IPV6_RECVPKTINFO:
+ case IPV6_RECVHOPLIMIT:
+ case IPV6_RECVRTHDR:
+ case IPV6_RECVPATHMTU:
+ case IPV6_RECVTCLASS:
case IPV6_V6ONLY:
+ case IPV6_AUTOFLOWLABEL:
if (optlen != sizeof(int)) {
error = EINVAL;
break;
else {
/* -1 = kernel default */
in6p->in6p_hops = optval;
-
- if ((in6p->in6p_vflag &
+ if ((in6p->inp_vflag &
INP_IPV4) != 0)
in6p->inp_ip_ttl = optval;
}
#define OPTSET(bit) \
do { \
if (optval) \
- in6p->in6p_flags |= (bit); \
+ in6p->inp_flags |= (bit); \
else \
- in6p->in6p_flags &= ~(bit); \
-} while (0)
-#define OPTBIT(bit) (in6p->in6p_flags & (bit) ? 1 : 0)
+ in6p->inp_flags &= ~(bit); \
+} while (/*CONSTCOND*/ 0)
+#define OPTSET2292(bit) \
+do { \
+ in6p->inp_flags |= IN6P_RFC2292; \
+ if (optval) \
+ in6p->inp_flags |= (bit); \
+ else \
+ in6p->inp_flags &= ~(bit); \
+} while (/*CONSTCOND*/ 0)
+#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);
+ break;
+
+ case IPV6_RECVDSTOPTS:
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ OPTSET(IN6P_DSTOPTS);
+ break;
+
+ case IPV6_RECVRTHDRDSTOPTS:
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ OPTSET(IN6P_RTHDRDSTOPTS);
+ break;
- case IPV6_CHECKSUM:
- in6p->in6p_cksum = optval;
+ case IPV6_RECVRTHDR:
+ /* cannot mix with RFC2292 */
+ if (OPTBIT(IN6P_RFC2292)) {
+ error = EINVAL;
+ break;
+ }
+ OPTSET(IN6P_RTHDR);
break;
case IPV6_FAITH:
- OPTSET(IN6P_FAITH);
+ OPTSET(INP_FAITH);
+ break;
+
+ 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:
+ if (optlen != sizeof(optval)) {
+ error = EINVAL;
+ break;
+ }
+ error = sooptcopyin(sopt, &optval,
+ sizeof optval, sizeof optval);
+ if (error)
+ break;
+ {
+ struct ip6_pktopts **optp;
+ optp = &in6p->in6p_outputopts;
+ error = ip6_pcbopt(optname,
+ (u_char *)&optval, sizeof(optval),
+ optp, uproto);
+ break;
+ }
+
+ case IPV6_2292PKTINFO:
+ case IPV6_2292HOPLIMIT:
+ case IPV6_2292HOPOPTS:
+ case IPV6_2292DSTOPTS:
+ case IPV6_2292RTHDR:
/* RFC 2292 */
if (optlen != sizeof(int)) {
error = EINVAL;
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);
+ OPTSET2292(IN6P_HOPOPTS);
break;
- case IPV6_DSTOPTS:
+ case IPV6_2292DSTOPTS:
if (!privileged)
return(EPERM);
- OPTSET(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS); /* XXX */
+ OPTSET2292(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS); /* XXX */
break;
- case IPV6_RTHDR:
- OPTSET(IN6P_RTHDR);
+ case IPV6_2292RTHDR:
+ OPTSET2292(IN6P_RTHDR);
+ break;
+ }
+ break;
+ case IPV6_3542PKTINFO:
+ case IPV6_3542HOPOPTS:
+ case IPV6_3542RTHDR:
+ case IPV6_3542DSTOPTS:
+ case IPV6_RTHDRDSTOPTS:
+ case IPV6_3542NEXTHOP:
+ {
+ /* 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) {
+ m_freem(m);
+ break;
+ }
+ error = ip6_pcbopt(optname, mtod(m, u_char *),
+ m->m_len, &in6p->in6p_outputopts, uproto);
+ m_freem(m);
break;
+ }
#undef OPTSET
case IPV6_MULTICAST_IF:
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:
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:
size_t len = 0;
struct mbuf *m;
- if (sopt->sopt_valsize > MCLBYTES) {
- error = EMSGSIZE;
- break;
- }
if ((error = soopt_getm(sopt, &m)) != 0) /* XXX */
break;
if ((error = soopt_mcopyin(sopt, m)) != 0) /* XXX */
case IPV6_FW_FLUSH:
case IPV6_FW_ZERO:
{
- if (ip6_fw_ctl_ptr == NULL && load_ipfw() != 0)
- return EINVAL;
-
- error = (*ip6_fw_ctl_ptr)(sopt);
+ if (ip6_fw_ctl_ptr == NULL)
+ load_ip6fw();
+ if (ip6_fw_ctl_ptr != NULL)
+ error = (*ip6_fw_ctl_ptr)(sopt);
+ else
+ return ENOPROTOOPT;
}
break;
#endif /* IPFIREWALL */
+ /*
+ * 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;
+
+ inp_bindif(in6p, optval);
+ 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));
+
+ if (error)
+ break;
+
+ error = inp_nocellular(in6p, optval);
+ break;
+
+ case IPV6_OUT_IF:
+ /* This option is not settable */
+ error = EINVAL;
+ break;
+
default:
error = ENOPROTOOPT;
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_RECVPKTINFO:
+ case IPV6_RECVHOPLIMIT:
+ case IPV6_RECVRTHDR:
+ case IPV6_RECVPATHMTU:
case IPV6_FAITH:
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_RECVHOPLIMIT:
+ optval = OPTBIT(IN6P_HOPLIMIT);
+ break;
+
+ case IPV6_RECVRTHDR:
+ optval = OPTBIT(IN6P_RTHDR);
+ break;
+
+ case IPV6_RECVPATHMTU:
+ optval = OPTBIT(IN6P_MTU);
break;
case IPV6_FAITH:
- optval = OPTBIT(IN6P_FAITH);
+ optval = OPTBIT(INP_FAITH);
break;
case IPV6_V6ONLY:
case IPV6_PORTRANGE:
{
int flags;
- flags = in6p->in6p_flags;
- if (flags & IN6P_HIGHPORT)
+ 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);
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);
+ if (sro.ro_rt)
+ rtfree(sro.ro_rt);
+ 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);
+ 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
struct mbuf *m = NULL;
struct mbuf **mp = &m;
- if (sopt->sopt_valsize > MCLBYTES) {
- error = EMSGSIZE;
- break;
- }
error = soopt_getm(sopt, &m); /* XXX */
if (error != 0)
break;
#if IPFIREWALL
case IPV6_FW_GET:
{
- if (ip6_fw_ctl_ptr == NULL && load_ipfw() != 0)
- return EINVAL;
-
- error = (*ip6_fw_ctl_ptr)(sopt);
+ if (ip6_fw_ctl_ptr == NULL)
+ load_ip6fw();
+ if (ip6_fw_ctl_ptr != NULL)
+ error = (*ip6_fw_ctl_ptr)(sopt);
+ else
+ return ENOPROTOOPT;
}
break;
#endif /* IPFIREWALL */
+ case IPV6_BOUND_IF:
+ if (in6p->inp_flags & INP_BOUND_IF)
+ optval = in6p->inp_boundif;
+ error = sooptcopyout(sopt, &optval,
+ sizeof (optval));
+ break;
+
+ case IPV6_NO_IFT_CELLULAR:
+ optval = (in6p->inp_flags & INP_NO_IFT_CELLULAR)
+ ? 1 : 0;
+ error = sooptcopyout(sopt, &optval,
+ sizeof (optval));
+ break;
+
+ case IPV6_OUT_IF:
+ optval = in6p->in6p_last_outif;
+ error = sooptcopyout(sopt, &optval,
+ sizeof (optval));
+ break;
+
default:
error = ENOPROTOOPT;
break;
return(error);
}
-/*
- * Set up IP6 options in pcb for insertion in output packets or
- * specifying behavior of outgoing packets.
- */
-static int
-ip6_pcbopts(
- struct ip6_pktopts **pktopt,
- struct mbuf *m,
- __unused struct socket *so,
- struct sockopt *sopt)
+int
+ip6_raw_ctloutput(struct socket *so, struct sockopt *sopt)
{
- struct ip6_pktopts *opt = *pktopt;
- int error = 0;
- struct proc *p = sopt->sopt_p;
- int priv = 0;
+ int error = 0, optval, optlen;
+ const int icmp6off = offsetof(struct icmp6_hdr, icmp6_cksum);
+ struct inpcb *in6p = sotoinpcb(so);
+ int level, op, optname;
- /* turn off any old options. */
- if (opt) {
-#if DIAGNOSTIC
- if (opt->ip6po_pktinfo || opt->ip6po_nexthop ||
- opt->ip6po_hbh || opt->ip6po_dest1 || opt->ip6po_dest2 ||
- opt->ip6po_rhinfo.ip6po_rhi_rthdr)
+ 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 (so->so_proto->pr_protocol ==
+ IPPROTO_ICMPV6) {
+ if (optval != icmp6off)
+ error = EINVAL;
+ } else
+ in6p->in6p_cksum = optval;
+ break;
+
+ case SOPT_GET:
+ if (so->so_proto->pr_protocol == 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);
+}
+
+/*
+ * Set up IP6 options in pcb for insertion in output packets or
+ * specifying behavior of outgoing packets.
+ */
+static int
+ip6_pcbopts(
+ struct ip6_pktopts **pktopt,
+ struct mbuf *m,
+ __unused struct socket *so,
+ __unused struct sockopt *sopt)
+{
+ struct ip6_pktopts *opt = *pktopt;
+ int error = 0;
+
+ /* turn off any old options. */
+ if (opt) {
+#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");
#endif
- ip6_clearpktopts(opt, 1, -1);
- } else
+ 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) {
}
/* 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, so->so_proto->pr_protocol)) != 0) {
+ ip6_clearpktopts(opt, -1); /* XXX: discard all options */
FREE(opt, M_IP6OPT);
return(error);
}
* the struct.
*/
void
-init_ip6pktopts(opt)
- struct ip6_pktopts *opt;
+ip6_initpktopts(struct ip6_pktopts *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;
+ int error = 0;
+ 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);
+ }
+
+ error = sooptcopyout(sopt, optdata, optdatalen);
+
+ return (error);
}
void
-ip6_clearpktopts(pktopt, needfree, optname)
+ip6_clearpktopts(pktopt, optname)
struct ip6_pktopts *pktopt;
- int needfree, optname;
+ 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) {
+ if (pktopt->ip6po_nextroute.ro_rt) {
+ rtfree(pktopt->ip6po_nextroute.ro_rt);
+ pktopt->ip6po_nextroute.ro_rt = NULL;
+ }
+ 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) {
pktopt->ip6po_route.ro_rt = NULL;
}
}
- 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;
}
}\
} 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) {
+ if (dst == NULL || src == NULL) {
printf("ip6_clearpktopts: invalid argument\n");
- return(NULL);
+ 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);
PKTOPT_EXTHDRCPY(ip6po_dest1);
PKTOPT_EXTHDRCPY(ip6po_dest2);
PKTOPT_EXTHDRCPY(ip6po_rthdr); /* not copy the cached route */
- return(dst);
+ return (0);
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);
+ ip6_clearpktopts(dst, -1);
+ return (ENOBUFS);
}
#undef PKTOPT_EXTHDRCPY
+struct ip6_pktopts *
+ip6_copypktopts(struct ip6_pktopts *src, int canwait)
+{
+ int error;
+ struct ip6_pktopts *dst;
+
+ dst = _MALLOC(sizeof(*dst), M_IP6OPT, canwait);
+ if (dst == NULL)
+ return (NULL);
+ ip6_initpktopts(dst);
+
+ if ((error = copypktopts(dst, src, canwait)) != 0) {
+ FREE(dst, M_IP6OPT);
+ return (NULL);
+ }
+
+ return (dst);
+}
+
void
ip6_freepcbopts(pktopt)
struct ip6_pktopts *pktopt;
if (pktopt == NULL)
return;
- ip6_clearpktopts(pktopt, 1, -1);
+ ip6_clearpktopts(pktopt, -1);
FREE(pktopt, M_IP6OPT);
}
-/*
- * Set the IP6 multicast options in response to user setsockopt().
- */
-static int
-ip6_setmoptions(
- int optname,
- struct inpcb* in6p,
- struct mbuf *m)
+void
+ip6_moptions_init(void)
{
- 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;
-
- 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);
+ PE_parse_boot_argn("ifa_debug", &im6o_debug, sizeof (im6o_debug));
- 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);
+ im6o_size = (im6o_debug == 0) ? sizeof (struct ip6_moptions) :
+ sizeof (struct ip6_moptions_dbg);
+
+ 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 */
}
-
- 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;
+ zone_change(im6o_zone, Z_EXPAND, TRUE);
+}
+
+void
+im6o_addref(struct ip6_moptions *im6o, int locked)
+{
+ if (!locked)
+ IM6O_LOCK(im6o);
+ else
+ IM6O_LOCK_ASSERT_HELD(im6o);
+
+ 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);
}
- imo = in6p->inp_moptions;
- switch (optname) {
+ if (!locked)
+ IM6O_UNLOCK(im6o);
+}
- 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;
+void
+im6o_remref(struct ip6_moptions *im6o)
+{
+ 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);
+ }
+
+ --im6o->im6o_refcnt;
+ if (im6o->im6o_refcnt > 0) {
+ IM6O_UNLOCK(im6o);
+ return;
+ }
+
+ 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->im6o_multicast_ifp = ifp;
- imo->imo_multicast_ifp = ifp;
- break;
+ IM6O_ADDREF(im6o);
+ }
+
+ return (im6o);
+}
+
+/*
+ * Set IPv6 outgoing packet options based on advanced API.
+ */
+int
+ip6_setpktopts(struct mbuf *control, struct ip6_pktopts *opt,
+ struct ip6_pktopts *stickyopt, int uproto)
+{
+ struct cmsghdr *cm = 0;
+
+ if (control == NULL || opt == NULL)
+ return (EINVAL);
+
+ ip6_initpktopts(opt);
+ if (stickyopt) {
+ int error;
- case IPV6_MULTICAST_HOPS:
- {
/*
- * Set the IP6 hoplimit for outgoing multicast packets.
+ * 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.
*/
- int optval;
- if (m == NULL || m->m_len != sizeof(int)) {
- error = EINVAL;
- break;
+ 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);
+
+ if (control->m_len < CMSG_LEN(0))
+ return (EINVAL);
+
+ for (cm = M_FIRST_CMSGHDR(control); cm; 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;
+
+ if (!sticky && !cmsg) {
+#ifdef DIAGNOSTIC
+ printf("ip6_setpktopt: impossible case\n");
+#endif
+ return (EINVAL);
+ }
+
+ /*
+ * 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);
}
- 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;
+ }
+ 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);
}
- break;
- }
+ }
+
+ 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 *)buf;
- case IPV6_MULTICAST_LOOP:
/*
- * Set the loopback flag for outgoing multicast packets.
- * Must be zero or one.
+ * 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]
*/
- if (m == NULL || m->m_len != sizeof(u_int)) {
- error = EINVAL;
+ if (optname == IPV6_PKTINFO && opt->ip6po_pktinfo &&
+ pktinfo->ipi6_ifindex == 0 &&
+ IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) {
+ ip6_clearpktopts(opt, optname);
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;
+ if (uproto == IPPROTO_TCP && optname == IPV6_PKTINFO &&
+ sticky && !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) {
+ return (EINVAL);
}
- 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;
+
+ /* validate the interface index if specified. */
+ ifnet_head_lock_shared();
+
+ if (pktinfo->ipi6_ifindex > if_index) {
+ ifnet_head_done();
+ return (ENXIO);
}
- 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;
+ if (pktinfo->ipi6_ifindex) {
+ ifp = ifindex2ifnet[pktinfo->ipi6_ifindex];
+ if (ifp == NULL) {
+ ifnet_head_done();
+ return (ENXIO);
}
- } 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 = lo_ifp;
- } 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);
- ro.ro_rt = NULL;
- }
- } else
- ifp = ifindex2ifnet[mreq->ipv6mr_interface];
+
+ ifnet_head_done();
/*
- * 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.
+ * 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 (IN6_IS_ADDR_MC_LINKLOCAL(&mreq->ipv6mr_multiaddr)) {
- mreq->ipv6mr_multiaddr.s6_addr16[1]
- = htons(mreq->ipv6mr_interface);
+ if (opt->ip6po_pktinfo == NULL) {
+ opt->ip6po_pktinfo = _MALLOC(sizeof(*pktinfo),
+ M_IP6OPT, M_NOWAIT);
+ if (opt->ip6po_pktinfo == NULL)
+ return (ENOBUFS);
}
- /*
- * 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);
+ bcopy(pktinfo, opt->ip6po_pktinfo, sizeof(*pktinfo));
break;
+ }
+
+ case IPV6_2292HOPLIMIT:
+ case IPV6_HOPLIMIT:
+ {
+ int *hlimp;
- 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.
+ * RFC 3542 deprecated the usage of sticky IPV6_HOPLIMIT
+ * to simplify the ordering among hoplimit options.
*/
- LIST_REMOVE(imm, i6mm_chain);
- in6_delmulti(imm->i6mm_maddr, 1);
- lck_mtx_unlock(nd6_mutex);
- FREE(imm, M_IPMADDR);
+ if (optname == IPV6_HOPLIMIT && sticky)
+ return (ENOPROTOOPT);
+
+ if (len != sizeof(int))
+ return (EINVAL);
+ hlimp = (int *)buf;
+ if (*hlimp < -1 || *hlimp > 255)
+ return (EINVAL);
+
+ opt->ip6po_hlim = *hlimp;
break;
+ }
- default:
- error = EOPNOTSUPP;
+ case IPV6_TCLASS:
+ {
+ int tclass;
+
+ if (len != sizeof(int))
+ return (EINVAL);
+ tclass = *(int *)buf;
+ if (tclass < -1 || tclass > 255)
+ return (EINVAL);
+
+ opt->ip6po_tclass = tclass;
break;
}
- /*
- * 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);
+ case IPV6_2292NEXTHOP:
+ case IPV6_NEXTHOP:
+ error = suser(kauth_cred_get(), 0);
+ if (error)
+ return (EACCES);
- return(error);
-}
+ if (len == 0) { /* just remove the option */
+ ip6_clearpktopts(opt, IPV6_NEXTHOP);
+ break;
+ }
-/*
- * 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;
-{
- u_int *hlim, *loop, *ifindex;
+ /* check if cmsg_len is large enough for sa_len */
+ if (len < sizeof(struct sockaddr) || len < *buf)
+ return (EINVAL);
- *mp = m_get(M_WAIT, MT_HEADER); /*XXX*/
+ switch (((struct sockaddr *)buf)->sa_family) {
+ case AF_INET6:
+ {
+ struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)buf;
- switch (optname) {
+ if (sa6->sin6_len != sizeof(struct sockaddr_in6))
+ return (EINVAL);
- 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);
+ 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_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);
+ /* 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_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);
+ case IPV6_2292HOPOPTS:
+ case IPV6_HOPOPTS:
+ {
+ struct ip6_hbh *hbh;
+ int hbhlen;
- default:
- return(EOPNOTSUPP);
- }
-}
+ /*
+ * 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);
-/*
- * Discard the IP6 multicast options.
- */
-void
-ip6_freemoptions(im6o)
- struct ip6_moptions *im6o;
-{
- struct in6_multi_mship *imm;
+ if (len == 0) {
+ ip6_clearpktopts(opt, IPV6_HOPOPTS);
+ break; /* just remove the option */
+ }
- if (im6o == NULL)
- 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);
-}
+ /* message length validation */
+ if (len < sizeof(struct ip6_hbh))
+ return (EINVAL);
+ hbh = (struct ip6_hbh *)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);
-/*
- * 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;
-{
- struct cmsghdr *cm = 0;
+ break;
+ }
- if (control == 0 || opt == 0)
- return(EINVAL);
+ case IPV6_2292DSTOPTS:
+ case IPV6_DSTOPTS:
+ case IPV6_RTHDRDSTOPTS:
+ {
+ struct ip6_dest *dest, **newdest = NULL;
+ int destlen;
- init_ip6pktopts(opt);
+ error = suser(kauth_cred_get(), 0);
+ if (error)
+ return (EACCES);
- /*
- * XXX: Currently, we assume all the optional information is stored
- * in a single mbuf.
- */
- if (control->m_next)
- return(EINVAL);
+ if (len == 0) {
+ ip6_clearpktopts(opt, optname);
+ break; /* just remove the option */
+ }
- 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 (cm->cmsg_level != IPPROTO_IPV6)
- continue;
+ /* message length validation */
+ if (len < sizeof(struct ip6_dest))
+ return (EINVAL);
+ dest = (struct ip6_dest *)buf;
+ destlen = (dest->ip6d_len + 1) << 3;
+ if (len != destlen)
+ return (EINVAL);
/*
- * XXX should check if RFC2292 API is mixed with 2292bis API
+ * Determine the position that the destination options header
+ * should be inserted; before or after the routing header.
*/
- 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);
- }
-
+ switch (optname) {
+ case IPV6_2292DSTOPTS:
/*
- * 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.
+ * 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 (!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 (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;
+ }
- case IPV6_HOPLIMIT:
- if (cm->cmsg_len != CMSG_LEN(sizeof(int)))
- return(EINVAL);
+ /* 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);
- opt->ip6po_hlim = *(int *)CMSG_DATA(cm);
- if (opt->ip6po_hlim < -1 || opt->ip6po_hlim > 255)
- return(EINVAL);
- break;
+ 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);
- break;
+ case IPV6_2292RTHDR:
+ case IPV6_RTHDR:
+ {
+ struct ip6_rthdr *rth;
+ int rthlen;
- 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;
- break;
+ if (len == 0) {
+ ip6_clearpktopts(opt, IPV6_RTHDR);
+ break; /* just remove the option */
}
- 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.
- */
- if (opt->ip6po_rthdr == NULL)
- newdest = &opt->ip6po_dest1;
- else
- newdest = &opt->ip6po_dest2;
-
- if (needcopy) {
- *newdest = _MALLOC(destlen, M_IP6OPT, M_WAITOK);
- bcopy(dest, *newdest, destlen);
- } else
- *newdest = dest;
+ /* message length validation */
+ if (len < sizeof(struct ip6_rthdr))
+ return (EINVAL);
+ rth = (struct ip6_rthdr *)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);
- if (needcopy) {
- opt->ip6po_rthdr = _MALLOC(rthlen, M_IP6OPT,
- M_WAITOK);
- bcopy(rth, opt->ip6po_rthdr, rthlen);
- } else
- opt->ip6po_rthdr = rth;
+ break;
+ }
- break;
+ case IPV6_USE_MIN_MTU:
+ if (len != sizeof(int))
+ return (EINVAL);
+ minmtupolicy = *(int *)buf;
+ if (minmtupolicy != IP6PO_MINMTU_MCASTONLY &&
+ minmtupolicy != IP6PO_MINMTU_DISABLE &&
+ minmtupolicy != IP6PO_MINMTU_ALL) {
+ return (EINVAL);
}
+ opt->ip6po_minmtu = minmtupolicy;
+ break;
- default:
- return(ENOPROTOOPT);
+ case IPV6_DONTFRAG:
+ if (len != sizeof(int))
+ return (EINVAL);
+
+ if (uproto == IPPROTO_TCP || *(int *)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;
+
+ case IPV6_PREFER_TEMPADDR:
+ if (len != sizeof(int))
+ return (EINVAL);
+ preftemp = *(int *)buf;
+ if (preftemp != IP6PO_TEMPADDR_SYSTEM &&
+ preftemp != IP6PO_TEMPADDR_NOTPREFER &&
+ preftemp != IP6PO_TEMPADDR_PREFER) {
+ return (EINVAL);
}
- }
+ opt->ip6po_prefer_tempaddr = preftemp;
+ break;
- return(0);
+ default:
+ return (ENOPROTOOPT);
+ } /* end of switch */
+
+ return (0);
}
/*
#endif
ip6 = mtod(copym, struct ip6_hdr *);
-#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
#ifdef __APPLE__
/* Makes sure the HW checksum flags are cleaned before sending the packet */
+ if ((copym->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA) != 0) {
+ in6_delayed_cksum(copym, sizeof(struct ip6_hdr));
+ copym->m_pkthdr.csum_flags &= ~CSUM_DELAY_IPV6_DATA;
+ }
copym->m_pkthdr.rcvif = 0;
copym->m_pkthdr.csum_data = 0;
copym->m_pkthdr.csum_flags = 0;
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
len = 0;
#define elen(x) \
- (((struct ip6_ext *)(x)) ? (((struct ip6_ext *)(x))->ip6e_len + 1) << 3 : 0)
+ (((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)
return len;
#undef elen
}
-
projects / apple / xnu.git / blobdiff