/* $NetBSD: ip6_var.h,v 1.82.2.1 2021/03/07 19:04:31 martin Exp $ */ /* $KAME: ip6_var.h,v 1.33 2000/06/11 14:59:20 jinmei 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. 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 #include #include #include #include #include #include struct ip6_moptions { if_index_t im6o_multicast_if_index; /* I/F for outgoing multicasts */ u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ LIST_HEAD(, in6_multi_mship) im6o_memberships; }; /* * Control options for outgoing packets */ /* Routing header related info */ struct ip6po_rhinfo { struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ struct route 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 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 { int ip6po_hlim; /* Hoplimit for outgoing packets */ struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */ struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */ struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */ struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */ struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */ 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) */ }; /* * IPv6 statistics. * Each counter is an unsigned 64-bit value. */ #define IP6_STAT_TOTAL 0 /* total packets received */ #define IP6_STAT_TOOSHORT 1 /* packet too short */ #define IP6_STAT_TOOSMALL 2 /* not enough data */ #define IP6_STAT_FRAGMENTS 3 /* fragments received */ #define IP6_STAT_FRAGDROPPED 4 /* frags dropped (dups, out of space) */ #define IP6_STAT_FRAGTIMEOUT 5 /* fragments timed out */ #define IP6_STAT_FRAGOVERFLOW 6 /* fragments that exceed limit */ #define IP6_STAT_FORWARD 7 /* packets forwarded */ #define IP6_STAT_CANTFORWARD 8 /* packets rcvd for uncreachable dst */ #define IP6_STAT_REDIRECTSENT 9 /* packets forwarded on same net */ #define IP6_STAT_DELIVERED 10 /* datagrams delivered to upper level */ #define IP6_STAT_LOCALOUT 11 /* total IP packets generated here */ #define IP6_STAT_ODROPPED 12 /* lost packets due to nobufs, etc. */ #define IP6_STAT_REASSEMBLED 13 /* total packets reassembled ok */ #define IP6_STAT_FRAGMENTED 14 /* datagrams successfully fragmented */ #define IP6_STAT_OFRAGMENTS 15 /* output fragments created */ #define IP6_STAT_CANTFRAG 16 /* don't fragment flag was set, etc. */ #define IP6_STAT_BADOPTIONS 17 /* error in option processing */ #define IP6_STAT_NOROUTE 18 /* packets discarded due to no route */ #define IP6_STAT_BADVERS 19 /* ip6 version != 6 */ #define IP6_STAT_RAWOUT 20 /* total raw ip packets generated */ #define IP6_STAT_BADSCOPE 21 /* scope error */ #define IP6_STAT_NOTMEMBER 22 /* don't join this multicast group */ #define IP6_STAT_NXTHIST 23 /* next header histogram */ /* space for 256 counters */ #define IP6_STAT_M1 279 /* one mbuf */ #define IP6_STAT_M2M 280 /* two or more mbuf */ /* space for 32 counters */ #define IP6_STAT_MEXT1 312 /* one ext mbuf */ #define IP6_STAT_MEXT2M 313 /* two or more ext mbuf */ #define IP6_STAT_EXTHDRTOOLONG 314 /* ext hdr are not contiguous */ #define IP6_STAT_NOGIF 315 /* no match gif found */ #define IP6_STAT_TOOMANYHDR 316 /* discarded due to too many headers */ /* * statistics for improvement of the source address selection * algorithm: * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 */ #define IP6_STAT_SOURCES_NONE 317 /* number of times that address selection fails */ #define IP6_STAT_SOURCES_SAMEIF 318 /* number of times that an address on the outgoing I/F is chosen */ /* space for 16 counters */ #define IP6_STAT_SOURCES_OTHERIF 334 /* number of times that an address on a non-outgoing I/F is chosen */ /* space for 16 counters */ #define IP6_STAT_SOURCES_SAMESCOPE 350 /* number of times that an address that has the same scope from the dest. is chosen */ /* space for 16 counters */ #define IP6_STAT_SOURCES_OTHERSCOPE 366 /* number of times that an address that has a different scope from the dest. is chosen */ /* space for 16 counters */ #define IP6_STAT_SOURCES_DEPRECATED 382 /* number of times that a deprecated address is chosen */ /* space for 16 counters */ #define IP6_STAT_FORWARD_CACHEHIT 398 #define IP6_STAT_FORWARD_CACHEMISS 399 #define IP6_STAT_FASTFORWARD 400 /* packets fast forwarded */ #define IP6_STAT_FASTFORWARDFLOWS 401 /* number of fast forward flows */ #define IP6_STAT_NOIPSEC 402 /* no match ipsec(4) found */ #define IP6_STAT_PFILDROP_IN 403 /* dropped by pfil (PFIL_IN) */ #define IP6_STAT_PFILDROP_OUT 404 /* dropped by pfil (PFIL_OUT) */ #define IP6_NSTATS 405 #define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */ /* * Structure for an IPv6 flow (ip6_fastforward). */ struct ip6flow { TAILQ_ENTRY(ip6flow) ip6f_list; /* next in active list */ TAILQ_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */ size_t ip6f_hashidx; /* own hash index of ipflowtable[] */ struct in6_addr ip6f_dst; /* destination address */ struct in6_addr ip6f_src; /* source address */ struct route ip6f_ro; /* associated route entry */ u_int32_t ip6f_flow; /* flow (tos) */ u_quad_t ip6f_uses; /* number of uses in this period */ u_quad_t ip6f_last_uses; /* number of uses in last period */ u_quad_t ip6f_dropped; /* ENOBUFS returned by if_output */ u_quad_t ip6f_forwarded; /* packets forwarded */ u_int ip6f_timer; /* lifetime timer */ }; #ifdef _KERNEL #include /* * Auxiliary attributes of incoming IPv6 packets, which is initialized when we * come into ip6_input(). * XXX do not make it a kitchen sink! */ struct ip6aux { /* ip6.ip6_dst */ struct in6_addr ip6a_src; uint32_t ip6a_scope_id; int ip6a_flags; }; /* 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) */ 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_sendredirect; /* send ICMPv6 redirect? */ 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? */ 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 */ extern struct socket *ip6_mrouter; /* multicast routing daemon */ 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_accept_rtadv; /* Acts as a host not a router */ extern int ip6_rtadv_maxroutes; /* maximum number of routes via rtadv */ extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 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_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 */ #ifdef GATEWAY extern int ip6_maxflows; /* maximum amount of flows for ip6ff */ extern int ip6_hashsize; /* size of hash table */ #endif struct in6pcb; extern const struct pr_usrreqs rip6_usrreqs; int icmp6_ctloutput(int, struct socket *, struct sockopt *); struct mbuf; void ip6_init(void); void ip6_input(struct mbuf *, struct ifnet *); const struct ip6aux *ip6_getdstifaddr(struct mbuf *); void ip6_freepcbopts(struct ip6_pktopts *); void ip6_freemoptions(struct ip6_moptions *); int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); int ip6_get_prevhdr(struct mbuf *, int); int ip6_nexthdr(struct mbuf *, int, int, int *); int ip6_lasthdr(struct mbuf *, int, int, int *); struct m_tag *ip6_addaux(struct mbuf *); struct m_tag *ip6_findaux(struct mbuf *); void ip6_delaux(struct mbuf *); struct ip6_hdr; int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *); void ip6_savecontrol(struct in6pcb *, struct mbuf **, struct ip6_hdr *, struct mbuf *); void ip6_notify_pmtu(struct in6pcb *, const struct sockaddr_in6 *, u_int32_t *); int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); void ip6_forward(struct mbuf *, int); void ip6_mloopback(struct ifnet *, struct mbuf *, const struct sockaddr_in6 *); int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route *, int, struct ip6_moptions *, struct in6pcb *, struct ifnet **); int ip6_if_output(struct ifnet * const, struct ifnet * const, struct mbuf * const, const struct sockaddr_in6 * const, const struct rtentry *); int ip6_ctloutput(int, struct socket *, struct sockopt *); int ip6_raw_ctloutput(int, struct socket *, struct sockopt *); void ip6_initpktopts(struct ip6_pktopts *); int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, struct ip6_pktopts *, kauth_cred_t, int); void ip6_clearpktopts(struct ip6_pktopts *, int); struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); int ip6_optlen(struct in6pcb *); void ip6_statinc(u_int); int route6_input(struct mbuf **, int *, int); void frag6_init(void); int frag6_input(struct mbuf **, int *, int); int ip6_reass_packet(struct mbuf **, int); void frag6_slowtimo(void); void frag6_fasttimo(void); void frag6_drain(void); void frag6_drainstub(void); int ip6flow_init(int); void ip6flow_poolinit(void); struct ip6flow *ip6flow_reap(int); void ip6flow_create(struct route *, struct mbuf *); void ip6flow_slowtimo(void); int ip6flow_invalidate_all(int); void rip6_init(void); int rip6_input(struct mbuf **, int *, int); void *rip6_ctlinput(int, const struct sockaddr *, void *); int rip6_ctloutput(int, struct socket *, struct sockopt *); int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *, struct mbuf *); int rip6_attach(struct socket *, int); int rip6_usrreq(struct socket *, int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *); int dest6_input(struct mbuf **, int *, int); int none_input(struct mbuf **, int *, int); struct route; int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, struct ip6_moptions *, struct route *, struct in6_addr *, struct ifnet **, struct psref *, struct in6_addr *); int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, struct route **, struct rtentry **, bool); int ip6_get_membership(const struct sockopt *, struct ifnet **, struct psref *, void *, size_t); u_int32_t ip6_randomid(void); u_int32_t ip6_randomflowlabel(void); static inline bool ip6_dad_enabled(void) { return ip6_dad_count > 0; } #endif /* _KERNEL */ #endif /* !_NETINET6_IP6_VAR_H_ */