/* $NetBSD: ip6_var.h,v 1.39 2007/03/07 22:20:04 liamjfoy 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_ /* * IP6 reassembly queue structure. Each fragment * being reassembled is attached to one of these structures. */ struct ip6q { u_int32_t ip6q_head; u_int16_t ip6q_len; u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ u_int8_t ip6q_hlim; struct ip6asfrag *ip6q_down; struct ip6asfrag *ip6q_up; u_int32_t ip6q_ident; u_int8_t ip6q_arrive; 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 */ #ifdef notyet u_char *ip6q_nxtp; #endif int ip6q_nfrag; /* # of fragments */ }; struct ip6asfrag { u_int32_t ip6af_head; u_int16_t ip6af_len; u_int8_t ip6af_nxt; u_int8_t ip6af_hlim; /* must not override the above members during reassembling */ 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) ((ip6af)->ip6af_m) struct ip6_moptions { 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 */ 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_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 */ 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_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) */ }; 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 an deprecated address is chosen */ u_quad_t ip6s_sources_deprecated[16]; u_quad_t ip6s_forward_cachehit; u_quad_t ip6s_forward_cachemiss; u_quad_t ip6s_fastforward; /* packets fast forwarded */ u_quad_t ip6s_fastforwardflows; /* number of fast forward flows*/ }; #define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */ /* * Structure for an IPv6 flow (ip6_fastforward). */ struct ip6flow { LIST_ENTRY(ip6flow) ip6f_list; /* next in active list */ LIST_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */ struct in6_addr ip6f_dst; /* destination address */ struct in6_addr ip6f_src; /* source address */ struct route_in6 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 */ time_t ip6f_start; /* creation time */ }; #ifdef _KERNEL /* * 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_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ }; /* 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) */ #ifdef __NO_STRICT_ALIGNMENT #define IP6_HDR_ALIGNED_P(ip) 1 #else #define IP6_HDR_ALIGNED_P(ip) ((((vaddr_t) (ip)) & 3) == 0) #endif 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_sendredirect; /* send ICMPv6 redirect? */ extern int ip6_forward_srcrt; /* forward src-routed? */ 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 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_sourcecheck; /* Verify source interface */ extern int ip6_sourcecheck_interval; /* Interval between log messages */ extern int ip6_accept_rtadv; /* Acts as a host not a router */ 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 */ #endif struct in6pcb; int icmp6_ctloutput(int, struct socket *, int, int, struct mbuf **); void ip6_init(void); void ip6intr(void); void ip6_input(struct mbuf *); struct in6_ifaddr *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); u_int8_t *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 *); 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 *); 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_in6 *, int, struct ip6_moptions *, struct socket *, struct ifnet **); int ip6_ctloutput(int, struct socket *, int, int, struct mbuf **); int ip6_raw_ctloutput(int, struct socket *, int, int, struct mbuf **); void ip6_initpktopts(struct ip6_pktopts *); int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 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 in6pcb *); 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); void ip6flow_init(void); struct ip6flow *ip6flow_reap(int); void ip6flow_create(const struct route_in6 *, struct mbuf *); void ip6flow_slowtimo(void); void ip6flow_invalidate_all(void); 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 *, int, int, struct mbuf **); int rip6_output(struct mbuf *, ...); 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; struct in6_addr *in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, struct ip6_moptions *, struct route *, struct in6_addr *, struct ifnet **, int *); int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, struct ip6_moptions *, struct route *, struct ifnet **, struct rtentry **, int); u_int32_t ip6_randomid(void); u_int32_t ip6_randomflowlabel(void); #endif /* _KERNEL */ #endif /* !_NETINET6_IP6_VAR_H_ */