/* * Copyright (c) 2000-2012 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_var.h,v 1.2.2.2 2001/07/03 11:01:54 ume Exp $ */ /* $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Copyright (c) 1982, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 */ #ifndef _NETINET6_IP6_VAR_H_ #define _NETINET6_IP6_VAR_H_ #include <sys/appleapiopts.h> #ifdef XNU_KERNEL_PRIVATE /* * IP6 reassembly queue structure. Each fragment * being reassembled is attached to one of these structures. */ struct ip6q { struct ip6asfrag *ip6q_down; struct ip6asfrag *ip6q_up; u_int32_t ip6q_ident; u_int8_t ip6q_nxt; u_int8_t ip6q_ecn; u_int8_t ip6q_ttl; struct in6_addr ip6q_src, ip6q_dst; struct ip6q *ip6q_next; struct ip6q *ip6q_prev; int ip6q_unfrglen; /* len of unfragmentable part */ #if notyet u_char *ip6q_nxtp; #endif int ip6q_nfrag; /* # of fragments */ }; struct ip6asfrag { struct ip6asfrag *ip6af_down; struct ip6asfrag *ip6af_up; struct mbuf *ip6af_m; int ip6af_offset; /* offset in ip6af_m to next header */ int ip6af_frglen; /* fragmentable part length */ int ip6af_off; /* fragment offset */ u_int16_t ip6af_mff; /* more fragment bit in frag off */ }; #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) struct ip6_moptions { decl_lck_mtx_data(, im6o_lock); uint32_t im6o_refcnt; /* ref count */ uint32_t im6o_debug; /* see ifa_debug flags */ struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ u_short im6o_num_memberships; /* no. memberships this socket */ u_short im6o_max_memberships; /* max memberships this socket */ struct in6_multi **im6o_membership; /* group memberships */ struct in6_mfilter *im6o_mfilters; /* source filters */ void (*im6o_trace) /* callback fn for tracing refs */ (struct ip6_moptions *, int); }; #define IM6O_LOCK_ASSERT_HELD(_im6o) \ lck_mtx_assert(&(_im6o)->im6o_lock, LCK_MTX_ASSERT_OWNED) #define IM6O_LOCK_ASSERT_NOTHELD(_im6o) \ lck_mtx_assert(&(_im6o)->im6o_lock, LCK_MTX_ASSERT_NOTOWNED) #define IM6O_LOCK(_im6o) \ lck_mtx_lock(&(_im6o)->im6o_lock) #define IM6O_LOCK_SPIN(_im6o) \ lck_mtx_lock_spin(&(_im6o)->im6o_lock) #define IM6O_CONVERT_LOCK(_im6o) do { \ IM6O_LOCK_ASSERT_HELD(_im6o); \ lck_mtx_convert_spin(&(_im6o)->im6o_lock); \ } while (0) #define IM6O_UNLOCK(_im6o) \ lck_mtx_unlock(&(_im6o)->im6o_lock) #define IM6O_ADDREF(_im6o) \ im6o_addref(_im6o, 0) #define IM6O_ADDREF_LOCKED(_im6o) \ im6o_addref(_im6o, 1) #define IM6O_REMREF(_im6o) \ im6o_remref(_im6o) struct ip6_exthdrs { struct mbuf *ip6e_ip6; struct mbuf *ip6e_hbh; struct mbuf *ip6e_dest1; struct mbuf *ip6e_rthdr; struct mbuf *ip6e_dest2; }; /* * Control options for outgoing packets */ /* Routing header related info */ struct ip6po_rhinfo { struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ }; #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr #define ip6po_route ip6po_rhinfo.ip6po_rhi_route /* Nexthop related info */ struct ip6po_nhinfo { struct sockaddr *ip6po_nhi_nexthop; struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ }; #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route struct ip6_pktopts { struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ int ip6po_hlim; /* Hoplimit for outgoing packets */ /* Outgoing IF/address information */ struct in6_pktinfo *ip6po_pktinfo; /* Next-hop address information */ struct ip6po_nhinfo ip6po_nhinfo; struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ /* Destination options header (before a routing header) */ struct ip6_dest *ip6po_dest1; /* Routing header related info. */ struct ip6po_rhinfo ip6po_rhinfo; /* Destination options header (after a routing header) */ struct ip6_dest *ip6po_dest2; int ip6po_tclass; /* traffic class */ int ip6po_minmtu; /* fragment vs PMTU discovery policy */ #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ int ip6po_prefer_tempaddr; /* whether temporary addresses are preferred as source address */ #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ int ip6po_flags; #if 0 /* parameters in this block is obsolete. do not reuse the values. */ #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ #endif #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ #define IP6PO_USECOA 0x08 /* use care of address */ }; /* * Control options for incoming packets */ #endif /* XNU_KERNEL_PRIVATE */ struct ip6stat { u_quad_t ip6s_total; /* total packets received */ u_quad_t ip6s_tooshort; /* packet too short */ u_quad_t ip6s_toosmall; /* not enough data */ u_quad_t ip6s_fragments; /* fragments received */ u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ u_quad_t ip6s_fragtimeout; /* fragments timed out */ u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ u_quad_t ip6s_forward; /* packets forwarded */ u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ u_quad_t ip6s_localout; /* total ip packets generated here */ u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ u_quad_t ip6s_reassembled; /* total packets reassembled ok */ u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */ u_quad_t ip6s_ofragments; /* output fragments created */ u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ u_quad_t ip6s_badoptions; /* error in option processing */ u_quad_t ip6s_noroute; /* packets discarded due to no route */ u_quad_t ip6s_badvers; /* ip6 version != 6 */ u_quad_t ip6s_rawout; /* total raw ip packets generated */ u_quad_t ip6s_badscope; /* scope error */ u_quad_t ip6s_notmember; /* don't join this multicast group */ u_quad_t ip6s_nxthist[256]; /* next header history */ u_quad_t ip6s_m1; /* one mbuf */ u_quad_t ip6s_m2m[32]; /* two or more mbuf */ u_quad_t ip6s_mext1; /* one ext mbuf */ u_quad_t ip6s_mext2m; /* two or more ext mbuf */ u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ u_quad_t ip6s_nogif; /* no match gif found */ u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ /* * statistics for improvement of the source address selection * algorithm: * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 */ /* number of times that address selection fails */ u_quad_t ip6s_sources_none; /* number of times that an address on the outgoing I/F is chosen */ u_quad_t ip6s_sources_sameif[16]; /* number of times that an address on a non-outgoing I/F is chosen */ u_quad_t ip6s_sources_otherif[16]; /* * number of times that an address that has the same scope * from the destination is chosen. */ u_quad_t ip6s_sources_samescope[16]; /* * number of times that an address that has a different scope * from the destination is chosen. */ u_quad_t ip6s_sources_otherscope[16]; /* number of times that a deprecated address is chosen */ u_quad_t ip6s_sources_deprecated[16]; u_quad_t ip6s_forward_cachehit; u_quad_t ip6s_forward_cachemiss; /* number of times that each rule of source selection is applied. */ u_quad_t ip6s_sources_rule[16]; #ifdef PRIVATE u_quad_t ip6s_pktdropcntrl; /* pkt dropped, no mbufs for control data */ #endif /* PRIVATE */ }; #ifdef KERNEL_PRIVATE #ifdef KERNEL /* * IPv6 onion peeling state. * it will be initialized when we come into ip6_input(). * XXX do not make it a kitchen sink! */ struct ip6aux { u_int32_t ip6a_flags; #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ #define IP6A_HASEEN 0x02 /* HA was present */ #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ #define IP6A_RTALERTSEEN 0x08 /* rtalert present */ /* ip6.ip6_src */ struct in6_addr ip6a_careof; /* care-of address of the peer */ struct in6_addr ip6a_home; /* home address of the peer */ u_int16_t ip6a_bruid; /* BR unique identifier */ /* ip6.ip6_dst */ struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ /* rtalert */ u_int16_t ip6a_rtalert; /* rtalert option value */ /* * decapsulation history will be here. * with IPsec it may not be accurate. */ }; /* flags passed to ip6_output as last parameter */ #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ #define IPV6_FLAG_NOSRCIFSEL 0x80 /* bypas source address selection */ #define IPV6_OUTARGS 0x100 /* has ancillary output info */ #ifdef XNU_KERNEL_PRIVATE #define IP6_HDR_ALIGNED_P(_ip6) ((((uintptr_t)(_ip6)) & ((uintptr_t)3)) == 0) /* * On platforms which require strict alignment (currently for anything but * i386 or x86_64), this macro checks whether the pointer to the IP header * is 32-bit aligned, and assert otherwise. */ #if defined(__i386__) || defined(__x86_64__) #define IP6_HDR_STRICT_ALIGNMENT_CHECK(_ip6) do { } while (0) #else /* !__i386__ && !__x86_64__ */ #define IP6_HDR_STRICT_ALIGNMENT_CHECK(_ip6) do { \ if (!IP_HDR_ALIGNED_P(_ip6)) { \ panic_plain("\n%s: Unaligned IPv6 header %p\n", \ __func__, _ip6); \ } \ } while (0) #endif /* !__i386__ && !__x86_64__ */ #endif /* XNU_KERNEL_PRIVATE */ #include <net/flowadv.h> /* * Extra information passed to ip6_output when IPV6_OUTARGS is set. */ struct ip6_out_args { unsigned int ip6oa_boundif; /* bound outgoing interface */ struct flowadv ip6oa_flowadv; /* flow advisory code */ u_int32_t ip6oa_flags; /* IP6OAF flags (see below) */ #define IP6OAF_SELECT_SRCIF 0x00000001 /* src interface selection */ #define IP6OAF_BOUND_IF 0x00000002 /* boundif value is valid */ #define IP6OAF_BOUND_SRCADDR 0x00000004 /* bound to src address */ #define IP6OAF_NO_CELLULAR 0x00000010 /* skip IFT_CELLULAR */ }; extern struct ip6stat ip6stat; /* statistics */ extern u_int32_t ip6_id; /* fragment identifier */ extern int ip6_defhlim; /* default hop limit */ extern int ip6_defmcasthlim; /* default multicast hop limit */ extern int ip6_forwarding; /* act as router? */ extern int ip6_forward_srcrt; /* forward src-routed? */ extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ extern int ip6_use_deprecated; /* allow deprecated addr as source */ extern int ip6_rr_prune; /* router renumbering prefix * walk list every 5 sec. */ extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */ #define ip6_mapped_addr_on (!ip6_v6only) extern int ip6_v6only; extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */ extern int ip6_maxifprefixes; /* Max acceptable prefixes via RA per IF */ extern int ip6_maxifdefrouters; /* Max acceptable def routers via RA */ extern int ip6_maxdynroutes; /* Max # of routes created via redirect */ #if MROUTING extern struct socket *ip6_mrouter; /* multicast routing daemon */ #endif extern int ip6_sendredirects; /* send IP redirects when forwarding? */ extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ extern int ip6_sourcecheck; /* Verify source interface */ extern int ip6_sourcecheck_interval; /* Interval between log messages */ extern int ip6_accept_rtadv; /* deprecated */ extern int ip6_log_interval; extern time_t ip6_log_time; extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ extern int ip6_dad_count; /* DupAddrDetectionTransmits */ extern int ip6_only_allow_rfc4193_prefix; /* RFC4193 Unique Local Unicast Prefixes only */ extern u_int32_t ip6_flow_seq; extern int ip6_auto_flowlabel; extern int ip6_auto_linklocal; extern int ip6_anonportmin; /* minimum ephemeral port */ extern int ip6_anonportmax; /* maximum ephemeral port */ extern int ip6_lowportmin; /* minimum reserved port */ extern int ip6_lowportmax; /* maximum reserved port */ extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses in the source address selection */ extern int ip6_use_defzone; /* whether to use the default scope zone when unspecified */ extern struct pr_usrreqs rip6_usrreqs; extern struct pr_usrreqs icmp6_dgram_usrreqs; extern int ip6_doscopedroute; extern int ip6_restrictrecvif; struct sockopt; struct inpcb; int icmp6_ctloutput(struct socket *, struct sockopt *); int icmp6_dgram_ctloutput(struct socket *, struct sockopt *); int icmp6_dgram_send(struct socket *, int , struct mbuf *, struct sockaddr *, struct mbuf *, struct proc *); int icmp6_dgram_attach(struct socket *, int , struct proc *); struct in6_ifaddr; void ip6_init(void); void ip6_input(struct mbuf *); struct in6_ifaddr *ip6_getdstifaddr(struct mbuf *); void ip6_freepcbopts(struct ip6_pktopts *); int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); char * ip6_get_prevhdr(struct mbuf *, int); int ip6_nexthdr(struct mbuf *, int, int, int *); int ip6_lasthdr(struct mbuf *, int, int, int *); extern void ip6_moptions_init(void); extern struct ip6_moptions *ip6_allocmoptions(int); extern void im6o_addref(struct ip6_moptions *, int); extern void im6o_remref(struct ip6_moptions *); struct ip6aux *ip6_addaux(struct mbuf *); struct ip6aux *ip6_findaux(struct mbuf *); void ip6_delaux(struct mbuf *); extern void ip6_destroyaux(struct ip6aux *); extern void ip6_copyaux(struct ip6aux *, struct ip6aux *); int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, u_int32_t *); struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, struct mbuf **, int *); int ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); struct mbuf *ip6_forward(struct mbuf *, struct route_in6 *, int); void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *, u_int32_t *)); void ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *); int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route_in6 *, int, struct ip6_moptions *, struct ifnet **, struct ip6_out_args *); int ip6_output_list(struct mbuf *, int, struct ip6_pktopts *, struct route_in6 *, int, struct ip6_moptions *, struct ifnet **, struct ip6_out_args *); int ip6_ctloutput(struct socket *, struct sockopt *sopt); void ip6_initpktopts(struct ip6_pktopts *); int ip6_setpktoptions(struct mbuf *, struct ip6_pktopts *, int, int); void ip6_clearpktopts(struct ip6_pktopts *, int); struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); int ip6_optlen(struct inpcb *); int route6_input(struct mbuf **, int *, int); void frag6_init(void); int frag6_input(struct mbuf **, int *, int); void frag6_slowtimo(void); void frag6_drain(void); int rip6_input(struct mbuf **, int *, int); void rip6_ctlinput(int, struct sockaddr *, void *); int rip6_ctloutput(struct socket *so, struct sockopt *sopt); int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *, struct mbuf *, int); int dest6_input(struct mbuf **, int *, int); extern struct in6_addr *in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, struct inpcb *, struct route_in6 *, struct ifnet **, struct in6_addr *, unsigned int, int *); extern struct in6_addrpolicy * in6_addrsel_lookup_policy(struct sockaddr_in6 *); int in6_selectroute(struct sockaddr_in6 *, struct sockaddr_in6 *, struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *, struct ifnet **, struct rtentry **, int, const struct ip6_out_args *); int ip6_setpktopts(struct mbuf *control, struct ip6_pktopts *opt, struct ip6_pktopts *stickyopt, int uproto); u_int32_t ip6_randomid(void); u_int32_t ip6_randomflowlabel(void); #endif /* KERNEL */ #endif /* KERNEL_PRIVATE */ #endif /* !_NETINET6_IP6_VAR_H_ */