78678b130a
- most of the kernel code will not care about the actual encoding of
scope zone IDs and won't touch "s6_addr16[1]" directly.
- similarly, most of the kernel code will not care about link-local
scoped addresses as a special case.
- scope boundary check will be stricter. For example, the current
*BSD code allows a packet with src=::1 and dst=(some global IPv6
address) to be sent outside of the node, if the application do:
s = socket(AF_INET6);
bind(s, "::1");
sendto(s, some_global_IPv6_addr);
This is clearly wrong, since ::1 is only meaningful within a single
node, but the current implementation of the *BSD kernel cannot
reject this attempt.
- and, while there, don't try to remove the ff02::/32 interface route
entry in in6_ifdetach() as it's already gone.
This also includes some level of support for the standard source
address selection algorithm defined in RFC3484, which will be
completed on in the future.
From the KAME project via JINMEI Tatuya.
Approved by core@.
324 lines
13 KiB
C
324 lines
13 KiB
C
/* $NetBSD: ip6_var.h,v 1.35 2006/01/21 00:15:36 rpaulo 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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/*
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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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u_int32_t ip6q_head;
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u_int16_t ip6q_len;
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u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */
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u_int8_t ip6q_hlim;
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struct ip6asfrag *ip6q_down;
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struct ip6asfrag *ip6q_up;
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u_int32_t ip6q_ident;
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u_int8_t ip6q_arrive;
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u_int8_t ip6q_ttl;
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struct in6_addr ip6q_src, ip6q_dst;
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struct ip6q *ip6q_next;
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struct ip6q *ip6q_prev;
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int ip6q_unfrglen; /* len of unfragmentable part */
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#ifdef notyet
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u_char *ip6q_nxtp;
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#endif
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int ip6q_nfrag; /* # of fragments */
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};
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struct ip6asfrag {
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u_int32_t ip6af_head;
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u_int16_t ip6af_len;
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u_int8_t ip6af_nxt;
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u_int8_t ip6af_hlim;
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/* must not override the above members during reassembling */
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struct ip6asfrag *ip6af_down;
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struct ip6asfrag *ip6af_up;
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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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#define IP6_REASS_MBUF(ip6af) ((ip6af)->ip6af_m)
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struct ip6_moptions {
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struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
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u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */
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u_char im6o_multicast_loop; /* 1 >= hear sends if a member */
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LIST_HEAD(, in6_multi_mship) im6o_memberships;
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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_in6 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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struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
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int ip6po_hlim; /* Hoplimit for outgoing packets */
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struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */
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struct sockaddr *ip6po_nexthop; /* Next-hop address */
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struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
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struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */
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struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */
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struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */
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};
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struct ip6stat {
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u_quad_t ip6s_total; /* total packets received */
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u_quad_t ip6s_tooshort; /* packet too short */
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u_quad_t ip6s_toosmall; /* not enough data */
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u_quad_t ip6s_fragments; /* fragments received */
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u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */
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u_quad_t ip6s_fragtimeout; /* fragments timed out */
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u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */
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u_quad_t ip6s_forward; /* packets forwarded */
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u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */
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u_quad_t ip6s_redirectsent; /* packets forwarded on same net */
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u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/
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u_quad_t ip6s_localout; /* total ip packets generated here */
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u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */
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u_quad_t ip6s_reassembled; /* total packets reassembled ok */
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u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */
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u_quad_t ip6s_ofragments; /* output fragments created */
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u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */
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u_quad_t ip6s_badoptions; /* error in option processing */
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u_quad_t ip6s_noroute; /* packets discarded due to no route */
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u_quad_t ip6s_badvers; /* ip6 version != 6 */
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u_quad_t ip6s_rawout; /* total raw ip packets generated */
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u_quad_t ip6s_badscope; /* scope error */
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u_quad_t ip6s_notmember; /* don't join this multicast group */
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u_quad_t ip6s_nxthist[256]; /* next header history */
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u_quad_t ip6s_m1; /* one mbuf */
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u_quad_t ip6s_m2m[32]; /* two or more mbuf */
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u_quad_t ip6s_mext1; /* one ext mbuf */
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u_quad_t ip6s_mext2m; /* two or more ext mbuf */
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u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */
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u_quad_t ip6s_nogif; /* no match gif found */
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u_quad_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_quad_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_quad_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_quad_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_quad_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_quad_t ip6s_sources_otherscope[16];
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/* number of times that an deprecated address is chosen */
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u_quad_t ip6s_sources_deprecated[16];
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u_quad_t ip6s_forward_cachehit;
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u_quad_t ip6s_forward_cachemiss;
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};
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#ifdef _KERNEL
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/*
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* Auxiliary attributes of incoming IPv6 packets, which is initialized when we
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* come into ip6_input().
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* XXX do not make it a kitchen sink!
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*/
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struct ip6aux {
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/* ip6.ip6_dst */
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struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
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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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#ifdef __NO_STRICT_ALIGNMENT
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#define IP6_HDR_ALIGNED_P(ip) 1
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#else
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#define IP6_HDR_ALIGNED_P(ip) ((((vaddr_t) (ip)) & 3) == 0)
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#endif
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extern struct ip6stat ip6stat; /* statistics */
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extern u_int32_t ip6_id; /* fragment identifier */
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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_sendredirect; /* send ICMPv6 redirect? */
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extern int ip6_forward_srcrt; /* forward src-routed? */
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extern int ip6_use_deprecated; /* allow deprecated addr as source */
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extern int ip6_rr_prune; /* router renumbering prefix
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* walk list every 5 sec. */
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extern int ip6_v6only;
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extern struct socket *ip6_mrouter; /* 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_sourcecheck; /* Verify source interface */
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extern int ip6_sourcecheck_interval; /* Interval between log messages */
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extern int ip6_accept_rtadv; /* Acts as a host not a router */
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extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
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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_auto_flowlabel;
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extern int ip6_auto_linklocal;
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extern int ip6_anonportmin; /* minimum ephemeral port */
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extern int ip6_anonportmax; /* maximum ephemeral port */
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extern int ip6_lowportmin; /* minimum reserved port */
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extern int ip6_lowportmax; /* maximum reserved port */
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extern int ip6_use_defzone; /* whether to use the default scope zone
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when unspecified */
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struct in6pcb;
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int icmp6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
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void ip6_init __P((void));
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void ip6intr __P((void));
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void ip6_input __P((struct mbuf *));
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struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *));
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void ip6_freemoptions __P((struct ip6_moptions *));
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int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
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u_int8_t *ip6_get_prevhdr __P((struct mbuf *, int));
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int ip6_nexthdr __P((struct mbuf *, int, int, int *));
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int ip6_lasthdr __P((struct mbuf *, int, int, int *));
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struct m_tag *ip6_addaux __P((struct mbuf *));
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struct m_tag *ip6_findaux __P((struct mbuf *));
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void ip6_delaux __P((struct mbuf *));
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int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));
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int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
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u_int32_t *));
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void ip6_savecontrol __P((struct in6pcb *, struct mbuf **, struct ip6_hdr *,
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struct mbuf *));
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int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
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void ip6_forward __P((struct mbuf *, int));
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void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
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int ip6_output __P((struct mbuf *, struct ip6_pktopts *,
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struct route_in6 *, int,
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struct ip6_moptions *, struct socket *,
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struct ifnet **));
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int ip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
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int ip6_raw_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
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int ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, int));
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int ip6_optlen __P((struct in6pcb *));
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int route6_input __P((struct mbuf **, int *, int));
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void frag6_init __P((void));
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int frag6_input __P((struct mbuf **, int *, int));
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void frag6_slowtimo __P((void));
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void frag6_drain __P((void));
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void rip6_init __P((void));
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int rip6_input __P((struct mbuf **, int *, int));
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void rip6_ctlinput __P((int, struct sockaddr *, void *));
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int rip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
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int rip6_output __P((struct mbuf *, ...));
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int rip6_usrreq __P((struct socket *,
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int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *));
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int dest6_input __P((struct mbuf **, int *, int));
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int none_input __P((struct mbuf **, int *, int));
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struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *,
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struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *,
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struct in6_addr *, struct ifnet **, int *));
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int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *,
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struct ip6_moptions *, struct route_in6 *, struct ifnet **,
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struct rtentry **, int));
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u_int32_t ip6_randomid __P((void));
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u_int32_t ip6_randomflowlabel __P((void));
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#endif /* _KERNEL */
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#endif /* !_NETINET6_IP6_VAR_H_ */
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