18b40a43ee
In protosw we define pr_protocol as short, while on the wire
it is an uint8_t. That way we can have "internal" protocols
like DIVERT, SEND or gaps for modules (PROTO_SPACER).
Switch ipproto_{un,}register to accept a short protocol number(*)
and do an upfront check for valid boundries. With this we
also consistently report EPROTONOSUPPORT for out of bounds
protocols, as we did for proto == 0. This allows a caller
to not error for this case, which is especially important
if we want to automatically call these from domain handling.
(*) the functions have been without any in-tree consumer
since the initial introducation, so this is considered save.
Implement ip6proto_{un,}register() similarly to their legacy IP
counter parts to allow modules to hook up dynamically.
Reviewed by: philip, will
MFC after: 1 week
445 lines
17 KiB
C
445 lines
17 KiB
C
/*-
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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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* $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $
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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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* 4. 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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* $FreeBSD$
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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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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_nxt;
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u_int8_t ip6q_ecn;
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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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struct label *ip6q_label;
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};
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struct ip6asfrag {
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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) (*(struct mbuf **)&((ip6af)->ip6af_m))
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/*
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* Structure attached to inpcb.in6p_moptions and
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* passed to ip6_output when IPv6 multicast options are in use.
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* This structure is lazy-allocated.
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*/
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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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u_short im6o_num_memberships; /* no. memberships this socket */
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u_short im6o_max_memberships; /* max memberships this socket */
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struct in6_multi **im6o_membership; /* group memberships */
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struct in6_mfilter *im6o_mfilters; /* source filters */
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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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/* Nexthop related info */
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struct ip6po_nhinfo {
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struct sockaddr *ip6po_nhi_nexthop;
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struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
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};
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#define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
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#define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_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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/* Outgoing IF/address information */
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struct in6_pktinfo *ip6po_pktinfo;
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/* Next-hop address information */
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struct ip6po_nhinfo ip6po_nhinfo;
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struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
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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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int ip6po_tclass; /* traffic class */
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int ip6po_minmtu; /* fragment vs PMTU discovery policy */
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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_prefer_tempaddr; /* whether temporary addresses are
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preferred as source address */
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#define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
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#define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
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#define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
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int ip6po_flags;
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#if 0 /* parameters in this block is obsolete. do not reuse the values. */
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#define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
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#define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
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#endif
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#define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
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#define IP6PO_USECOA 0x08 /* use care of address */
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};
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/*
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* Control options for incoming packets
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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 a deprecated address is chosen */
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u_quad_t ip6s_sources_deprecated[16];
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/* number of times that each rule of source selection is applied. */
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u_quad_t ip6s_sources_rule[16];
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};
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#ifdef _KERNEL
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#define IP6STAT_ADD(name, val) V_ip6stat.name += (val)
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#define IP6STAT_SUB(name, val) V_ip6stat.name -= (val)
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#define IP6STAT_INC(name) IP6STAT_ADD(name, 1)
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#define IP6STAT_DEC(name) IP6STAT_SUB(name, 1)
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#endif
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#ifdef _KERNEL
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/*
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* IPv6 onion peeling state.
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* it will be initialized when we 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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u_int32_t ip6a_flags;
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#define IP6A_SWAP 0x01 /* swapped home/care-of on packet */
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#define IP6A_HASEEN 0x02 /* HA was present */
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#define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
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#define IP6A_RTALERTSEEN 0x08 /* rtalert present */
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/* ip6.ip6_src */
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struct in6_addr ip6a_careof; /* care-of address of the peer */
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struct in6_addr ip6a_home; /* home address of the peer */
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u_int16_t ip6a_bruid; /* BR unique identifier */
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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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/* rtalert */
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u_int16_t ip6a_rtalert; /* rtalert option value */
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/*
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* decapsulation history will be here.
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* with IPsec it may not be accurate.
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*/
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};
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#endif
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#ifdef _KERNEL
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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) ((((intptr_t) (ip)) & 3) == 0)
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#endif
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VNET_DECLARE(struct ip6stat, ip6stat); /* statistics */
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VNET_DECLARE(int, ip6_defhlim); /* default hop limit */
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VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */
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VNET_DECLARE(int, ip6_forwarding); /* act as router? */
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VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */
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VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix
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* walk list every 5 sec. */
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VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */
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VNET_DECLARE(int, ip6_v6only);
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#define V_ip6stat VNET(ip6stat)
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#define V_ip6_defhlim VNET(ip6_defhlim)
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#define V_ip6_defmcasthlim VNET(ip6_defmcasthlim)
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#define V_ip6_forwarding VNET(ip6_forwarding)
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#define V_ip6_use_deprecated VNET(ip6_use_deprecated)
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#define V_ip6_rr_prune VNET(ip6_rr_prune)
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#define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu)
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#define V_ip6_v6only VNET(ip6_v6only)
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VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */
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VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */
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VNET_DECLARE(int, ip6_maxfragpackets); /* Maximum packets in reassembly
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* queue */
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VNET_DECLARE(int, ip6_maxfrags); /* Maximum fragments in reassembly
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* queue */
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VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */
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VNET_DECLARE(int, ip6_keepfaith); /* Firewall Aided Internet Translator */
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VNET_DECLARE(int, ip6_log_interval);
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VNET_DECLARE(time_t, ip6_log_time);
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VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension
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* headers */
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VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */
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#define V_ip6_mrouter VNET(ip6_mrouter)
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#define V_ip6_sendredirects VNET(ip6_sendredirects)
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#define V_ip6_maxfragpackets VNET(ip6_maxfragpackets)
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#define V_ip6_maxfrags VNET(ip6_maxfrags)
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#define V_ip6_accept_rtadv VNET(ip6_accept_rtadv)
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#define V_ip6_keepfaith VNET(ip6_keepfaith)
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#define V_ip6_log_interval VNET(ip6_log_interval)
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#define V_ip6_log_time VNET(ip6_log_time)
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#define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit)
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#define V_ip6_dad_count VNET(ip6_dad_count)
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VNET_DECLARE(int, ip6_auto_flowlabel);
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VNET_DECLARE(int, ip6_auto_linklocal);
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#define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel)
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#define V_ip6_auto_linklocal VNET(ip6_auto_linklocal)
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VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */
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VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary
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* addresses in the source address
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* selection */
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#define V_ip6_use_tempaddr VNET(ip6_use_tempaddr)
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#define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr)
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VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope
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* zone when unspecified */
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#define V_ip6_use_defzone VNET(ip6_use_defzone)
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VNET_DECLARE (struct pfil_head, inet6_pfil_hook); /* packet filter hooks */
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#define V_inet6_pfil_hook VNET(inet6_pfil_hook)
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#ifdef IPSTEALTH
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VNET_DECLARE(int, ip6stealth);
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#define V_ip6stealth VNET(ip6stealth)
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#endif
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extern struct pr_usrreqs rip6_usrreqs;
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struct sockopt;
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struct inpcb;
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int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt));
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struct in6_ifaddr;
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void ip6_init __P((void));
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#ifdef VIMAGE
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void ip6_destroy __P((void));
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#endif
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int ip6proto_register(short);
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int ip6proto_unregister(short);
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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_freepcbopts __P((struct ip6_pktopts *));
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int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
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char * 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 ip6aux *ip6_addaux __P((struct mbuf *));
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struct ip6aux *ip6_findaux __P((struct mbuf *));
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void ip6_delaux __P((struct mbuf *));
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extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
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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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struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
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struct mbuf **, int *);
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void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **));
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void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
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u_int32_t *));
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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 *,
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int,
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struct ip6_moptions *, struct ifnet **,
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struct inpcb *));
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int ip6_ctloutput __P((struct socket *, struct sockopt *));
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int ip6_raw_ctloutput __P((struct socket *, struct sockopt *));
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void ip6_initpktopts __P((struct ip6_pktopts *));
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int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *,
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struct ip6_pktopts *, struct ucred *, int));
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void ip6_clearpktopts __P((struct ip6_pktopts *, int));
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struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
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int ip6_optlen __P((struct inpcb *));
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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((struct socket *, struct sockopt *));
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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 thread *));
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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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int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *,
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struct inpcb *inp, struct route_in6 *, struct ucred *cred,
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struct ifnet **, struct in6_addr *);
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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 **));
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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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