388 lines
14 KiB
C
388 lines
14 KiB
C
/* $OpenBSD: ip6_var.h,v 1.117 2024/05/13 01:15:53 jsg Exp $ */
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/* $KAME: ip6_var.h,v 1.33 2000/06/11 14:59:20 jinmei Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ip_var.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NETINET6_IP6_VAR_H_
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#define _NETINET6_IP6_VAR_H_
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struct ip6stat {
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u_int64_t ip6s_total; /* total packets received */
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u_int64_t ip6s_tooshort; /* packet too short */
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u_int64_t ip6s_toosmall; /* not enough data */
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u_int64_t ip6s_fragments; /* fragments received */
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u_int64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
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u_int64_t ip6s_fragtimeout; /* fragments timed out */
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u_int64_t ip6s_fragoverflow; /* fragments that exceeded limit */
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u_int64_t ip6s_forward; /* packets forwarded */
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u_int64_t ip6s_cantforward; /* packets rcvd for unreachable dest */
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u_int64_t ip6s_redirectsent; /* packets forwarded on same net */
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u_int64_t ip6s_delivered; /* datagrams delivered to upper level*/
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u_int64_t ip6s_localout; /* total ip packets generated here */
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u_int64_t ip6s_odropped; /* lost output due to nobufs, etc. */
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u_int64_t ip6s_reassembled; /* total packets reassembled ok */
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u_int64_t ip6s_fragmented; /* datagrams successfully fragmented */
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u_int64_t ip6s_ofragments; /* output fragments created */
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u_int64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
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u_int64_t ip6s_badoptions; /* error in option processing */
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u_int64_t ip6s_noroute; /* packets discarded due to no route */
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u_int64_t ip6s_badvers; /* ip6 version != 6 */
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u_int64_t ip6s_rawout; /* total raw ip packets generated */
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u_int64_t ip6s_badscope; /* scope error */
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u_int64_t ip6s_notmember; /* don't join this multicast group */
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u_int64_t ip6s_nxthist[256]; /* next header history */
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u_int64_t ip6s_m1; /* one mbuf */
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u_int64_t ip6s_m2m[32]; /* two or more mbuf */
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u_int64_t ip6s_mext1; /* one ext mbuf */
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u_int64_t ip6s_mext2m; /* two or more ext mbuf */
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u_int64_t ip6s_nogif; /* no match gif found */
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u_int64_t ip6s_toomanyhdr; /* discarded due to too many headers */
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/*
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* statistics for improvement of the source address selection
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* algorithm:
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* XXX: hardcoded 16 = # of ip6 multicast scope types + 1
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*/
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/* number of times that address selection fails */
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u_int64_t ip6s_sources_none;
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/* number of times that an address on the outgoing I/F is chosen */
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u_int64_t ip6s_sources_sameif[16];
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/* number of times that an address on a non-outgoing I/F is chosen */
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u_int64_t ip6s_sources_otherif[16];
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/*
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* number of times that an address that has the same scope
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* from the destination is chosen.
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*/
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u_int64_t ip6s_sources_samescope[16];
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/*
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* number of times that an address that has a different scope
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* from the destination is chosen.
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*/
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u_int64_t ip6s_sources_otherscope[16];
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/* number of times that an deprecated address is chosen */
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u_int64_t ip6s_sources_deprecated[16];
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u_int64_t ip6s_rtcachehit; /* valid route found in cache */
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u_int64_t ip6s_rtcachemiss; /* route cache with new destination */
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u_int64_t ip6s_wrongif; /* packet received on wrong interface */
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u_int64_t ip6s_idropped; /* lost input due to nobufs, etc. */
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};
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#ifdef _KERNEL
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/*
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* IP6 reassembly queue structure. Each fragment
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* being reassembled is attached to one of these structures.
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*/
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struct ip6q {
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TAILQ_ENTRY(ip6q) ip6q_queue;
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LIST_HEAD(ip6asfrag_list, ip6asfrag) ip6q_asfrag;
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struct in6_addr ip6q_src, ip6q_dst;
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int ip6q_unfrglen; /* len of unfragmentable part */
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int ip6q_nfrag; /* # of fragments */
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u_int32_t ip6q_ident; /* fragment identification */
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u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
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u_int8_t ip6q_ecn;
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u_int8_t ip6q_ttl; /* time to live in slowtimo units */
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};
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struct ip6asfrag {
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LIST_ENTRY(ip6asfrag) ip6af_list;
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struct mbuf *ip6af_m;
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int ip6af_offset; /* offset in ip6af_m to next header */
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int ip6af_frglen; /* fragmentable part length */
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int ip6af_off; /* fragment offset */
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u_int16_t ip6af_mff; /* more fragment bit in frag off */
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};
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struct ip6_moptions {
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LIST_HEAD(, in6_multi_mship) im6o_memberships;
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unsigned short im6o_ifidx; /* ifp index for outgoing multicasts */
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u_char im6o_hlim; /* hoplimit for outgoing multicasts */
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u_char im6o_loop; /* 1 >= hear sends if a member */
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};
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/*
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* Control options for outgoing packets
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*/
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/* Routing header related info */
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struct ip6po_rhinfo {
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struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
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struct route ip6po_rhi_route; /* Route to the 1st hop */
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};
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#define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr
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#define ip6po_route ip6po_rhinfo.ip6po_rhi_route
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struct ip6_pktopts {
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/* Hoplimit for outgoing packets */
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int ip6po_hlim;
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/* Outgoing IF/address information */
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struct in6_pktinfo *ip6po_pktinfo;
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/* Hop-by-Hop options header */
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struct ip6_hbh *ip6po_hbh;
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/* Destination options header (before a routing header) */
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struct ip6_dest *ip6po_dest1;
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/* Routing header related info. */
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struct ip6po_rhinfo ip6po_rhinfo;
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/* Destination options header (after a routing header) */
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struct ip6_dest *ip6po_dest2;
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/* traffic class */
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int ip6po_tclass;
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/* fragment vs PMTU discovery policy */
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int ip6po_minmtu;
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#define IP6PO_MINMTU_MCASTONLY -1 /* default: send at min MTU for multicast */
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#define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */
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#define IP6PO_MINMTU_ALL 1 /* always send at min MTU */
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int ip6po_flags;
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#define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
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};
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#include <sys/percpu.h>
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enum ip6stat_counters {
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ip6s_total,
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ip6s_tooshort,
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ip6s_toosmall,
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ip6s_fragments,
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ip6s_fragdropped,
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ip6s_fragtimeout,
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ip6s_fragoverflow,
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ip6s_forward,
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ip6s_cantforward,
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ip6s_redirectsent,
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ip6s_delivered,
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ip6s_localout,
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ip6s_odropped,
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ip6s_reassembled,
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ip6s_fragmented,
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ip6s_ofragments,
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ip6s_cantfrag,
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ip6s_badoptions,
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ip6s_noroute,
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ip6s_badvers,
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ip6s_rawout,
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ip6s_badscope,
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ip6s_notmember,
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ip6s_nxthist,
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ip6s_m1 = ip6s_nxthist + 256,
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ip6s_m2m,
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ip6s_mext1 = ip6s_m2m + 32,
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ip6s_mext2m,
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ip6s_nogif,
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ip6s_toomanyhdr,
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ip6s_sources_none,
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ip6s_sources_sameif,
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ip6s_sources_otherif = ip6s_sources_sameif + 16,
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ip6s_sources_samescope = ip6s_sources_otherif + 16,
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ip6s_sources_otherscope = ip6s_sources_samescope + 16,
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ip6s_sources_deprecated = ip6s_sources_otherscope + 16,
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ip6s_rtcachehit = ip6s_sources_deprecated + 16,
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ip6s_rtcachemiss,
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ip6s_wrongif,
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ip6s_idropped,
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ip6s_ncounters,
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};
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extern struct cpumem *ip6counters;
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static inline void
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ip6stat_inc(enum ip6stat_counters c)
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{
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counters_inc(ip6counters, c);
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}
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static inline void
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ip6stat_add(enum ip6stat_counters c, uint64_t v)
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{
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counters_add(ip6counters, c, v);
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}
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/* flags passed to ip6_output as last parameter */
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#define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */
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#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
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#define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
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extern int ip6_mtudisc_timeout; /* mtu discovery */
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extern struct rttimer_queue icmp6_mtudisc_timeout_q;
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extern int ip6_defhlim; /* default hop limit */
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extern int ip6_defmcasthlim; /* default multicast hop limit */
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extern int ip6_forwarding; /* act as router? */
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extern int ip6_mforwarding; /* act as multicast router? */
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extern int ip6_multipath; /* use multipath routes */
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extern int ip6_sendredirect; /* send ICMPv6 redirect? */
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extern int ip6_use_deprecated; /* allow deprecated addr as source */
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extern int ip6_mcast_pmtu; /* path MTU discovery for multicast */
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extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */
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extern int ip6_maxdynroutes; /* Max # of routes created via redirect */
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extern struct socket *ip6_mrouter[RT_TABLEID_MAX + 1]; /* multicast routing daemon */
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extern int ip6_sendredirects; /* send IP redirects when forwarding? */
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extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
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extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
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extern int ip6_log_interval;
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extern time_t ip6_log_time;
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extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
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extern int ip6_dad_count; /* DupAddrDetectionTransmits */
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extern int ip6_dad_pending; /* number of currently running DADs */
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extern int ip6_auto_flowlabel;
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#define IP6_SOIIKEY_LEN 16
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extern uint8_t ip6_soiikey[IP6_SOIIKEY_LEN];
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extern const struct pr_usrreqs rip6_usrreqs;
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struct inpcb;
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struct ipsec_level;
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int icmp6_ctloutput(int, struct socket *, int, int, struct mbuf *);
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void ip6_init(void);
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void ip6intr(void);
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int ip6_input_if(struct mbuf **, int *, int, int, struct ifnet *);
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void ip6_freepcbopts(struct ip6_pktopts *);
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void ip6_freemoptions(struct ip6_moptions *);
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int ip6_unknown_opt(struct mbuf **, u_int8_t *, int);
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int ip6_get_prevhdr(struct mbuf *, int);
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int ip6_nexthdr(struct mbuf *, int, int, int *);
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int ip6_lasthdr(struct mbuf *, int, int, int *);
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int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
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int ip6_process_hopopts(struct mbuf **, u_int8_t *, int, u_int32_t *,
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u_int32_t *);
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void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
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int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
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void ip6_forward(struct mbuf *, struct route *, int);
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void ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
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int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route *, int,
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struct ip6_moptions *, const struct ipsec_level *);
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int ip6_fragment(struct mbuf *, struct mbuf_list *, int, u_char, u_long);
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int ip6_ctloutput(int, struct socket *, int, int, struct mbuf *);
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int ip6_raw_ctloutput(int, struct socket *, int, int, struct mbuf *);
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void ip6_initpktopts(struct ip6_pktopts *);
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int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
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struct ip6_pktopts *, int, int);
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void ip6_clearpktopts(struct ip6_pktopts *, int);
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void ip6_randomid_init(void);
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u_int32_t ip6_randomid(void);
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void ip6_send(struct mbuf *);
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int route6_input(struct mbuf **, int *, int, int);
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void frag6_init(void);
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int frag6_input(struct mbuf **, int *, int, int);
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int frag6_deletefraghdr(struct mbuf *, int);
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void frag6_slowtimo(void);
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void rip6_init(void);
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int rip6_input(struct mbuf **, int *, int, int);
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void rip6_ctlinput(int, struct sockaddr *, u_int, void *);
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int rip6_ctloutput(int, struct socket *, int, int, struct mbuf *);
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int rip6_output(struct mbuf *, struct socket *, struct sockaddr *,
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struct mbuf *);
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int rip6_attach(struct socket *, int, int);
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int rip6_detach(struct socket *);
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void rip6_lock(struct socket *);
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void rip6_unlock(struct socket *);
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int rip6_locked(struct socket *);
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int rip6_bind(struct socket *, struct mbuf *, struct proc *);
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int rip6_connect(struct socket *, struct mbuf *);
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int rip6_disconnect(struct socket *);
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int rip6_shutdown(struct socket *);
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int rip6_send(struct socket *, struct mbuf *, struct mbuf *,
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struct mbuf *);
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int rip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
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int dest6_input(struct mbuf **, int *, int, int);
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int in6_pcbselsrc(const struct in6_addr **, struct sockaddr_in6 *,
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struct inpcb *, struct ip6_pktopts *);
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int in6_selectsrc(const struct in6_addr **, struct sockaddr_in6 *,
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struct ip6_moptions *, unsigned int);
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struct rtentry *in6_selectroute(const struct in6_addr *, struct ip6_pktopts *,
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struct route *, unsigned int rtableid);
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u_int32_t ip6_randomflowlabel(void);
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#ifdef IPSEC
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struct tdb;
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int ip6_output_ipsec_lookup(struct mbuf *, const struct ipsec_level *,
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struct tdb **);
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int ip6_output_ipsec_send(struct tdb *, struct mbuf *, struct route *,
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int, int);
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#endif /* IPSEC */
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#endif /* _KERNEL */
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#endif /* !_NETINET6_IP6_VAR_H_ */
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