Summary: In preparation of making if_t completely opaque outside of the netstack, explicitly include the header. <net/if_var.h> will stop including the header in the future. Sponsored by: Juniper Networks, Inc. Reviewed by: glebius, melifaro Differential Revision: https://reviews.freebsd.org/D38200
438 lines
15 KiB
C
438 lines
15 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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* $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $
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* $FreeBSD$
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*/
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#ifndef _NETINET6_ND6_H_
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#define _NETINET6_ND6_H_
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/* see net/route.h, or net/if_inarp.h */
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#ifndef RTF_ANNOUNCE
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#define RTF_ANNOUNCE RTF_PROTO2
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#endif
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#include <sys/queue.h>
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#include <sys/callout.h>
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struct llentry;
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#define ND6_LLINFO_NOSTATE -2
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/*
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* We don't need the WAITDELETE state any more, but we keep the definition
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* in a comment line instead of removing it. This is necessary to avoid
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* unintentionally reusing the value for another purpose, which might
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* affect backward compatibility with old applications.
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* (20000711 jinmei@kame.net)
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*/
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/* #define ND6_LLINFO_WAITDELETE -1 */
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#define ND6_LLINFO_INCOMPLETE 0
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#define ND6_LLINFO_REACHABLE 1
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#define ND6_LLINFO_STALE 2
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#define ND6_LLINFO_DELAY 3
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#define ND6_LLINFO_PROBE 4
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#define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE)
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#define ND6_LLINFO_PERMANENT(n) (((n)->la_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE))
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struct nd_ifinfo {
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u_int32_t linkmtu; /* LinkMTU */
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u_int32_t maxmtu; /* Upper bound of LinkMTU */
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u_int32_t basereachable; /* BaseReachableTime */
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u_int32_t reachable; /* Reachable Time */
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u_int32_t retrans; /* Retrans Timer */
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u_int32_t flags; /* Flags */
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int recalctm; /* BaseReacable re-calculation timer */
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u_int8_t chlim; /* CurHopLimit */
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u_int8_t initialized; /* Flag to see the entry is initialized */
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/* the following 3 members are for privacy extension for addrconf */
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u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */
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u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */
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u_int8_t randomid[8]; /* current random ID */
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};
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#define ND6_IFF_PERFORMNUD 0x1
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#define ND6_IFF_ACCEPT_RTADV 0x2
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#define ND6_IFF_PREFER_SOURCE 0x4 /* Not used in FreeBSD. */
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#define ND6_IFF_IFDISABLED 0x8 /* IPv6 operation is disabled due to
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* DAD failure. (XXX: not ND-specific)
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*/
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#define ND6_IFF_DONT_SET_IFROUTE 0x10
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#define ND6_IFF_AUTO_LINKLOCAL 0x20
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#define ND6_IFF_NO_RADR 0x40
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#define ND6_IFF_NO_PREFER_IFACE 0x80 /* XXX: not related to ND. */
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#define ND6_IFF_NO_DAD 0x100
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#ifdef EXPERIMENTAL
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/* XXX: not related to ND. */
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#define ND6_IFF_IPV6_ONLY 0x200 /* draft-ietf-6man-ipv6only-flag */
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#define ND6_IFF_IPV6_ONLY_MANUAL 0x400
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#define ND6_IFF_IPV6_ONLY_MASK (ND6_IFF_IPV6_ONLY|ND6_IFF_IPV6_ONLY_MANUAL)
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#endif
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#ifdef _KERNEL
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#define ND_IFINFO(ifp) \
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(((struct in6_ifextra *)if_getafdata(ifp, AF_INET6))->nd_ifinfo)
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#define IN6_LINKMTU(ifp) \
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((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \
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? ND_IFINFO(ifp)->linkmtu \
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: ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \
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? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu))
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#endif
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struct in6_nbrinfo {
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char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */
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struct in6_addr addr; /* IPv6 address of the neighbor */
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long asked; /* number of queries already sent for this addr */
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int isrouter; /* if it acts as a router */
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int state; /* reachability state */
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int expire; /* lifetime for NDP state transition */
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};
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/* Sysctls, shared with user space. */
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struct in6_defrouter {
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struct sockaddr_in6 rtaddr;
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u_char flags;
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u_short rtlifetime;
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u_long expire;
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u_short if_index;
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};
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struct in6_prefix {
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struct sockaddr_in6 prefix;
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struct prf_ra raflags;
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u_char prefixlen;
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u_char origin;
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u_int32_t vltime;
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u_int32_t pltime;
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time_t expire;
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u_int32_t flags;
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int refcnt;
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u_short if_index;
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u_short advrtrs; /* number of advertisement routers */
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/* struct sockaddr_in6 advrtr[] */
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};
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#ifdef _KERNEL
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struct in6_ondireq {
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char ifname[IFNAMSIZ];
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struct {
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u_int32_t linkmtu; /* LinkMTU */
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u_int32_t maxmtu; /* Upper bound of LinkMTU */
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u_int32_t basereachable; /* BaseReachableTime */
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u_int32_t reachable; /* Reachable Time */
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u_int32_t retrans; /* Retrans Timer */
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u_int32_t flags; /* Flags */
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int recalctm; /* BaseReacable re-calculation timer */
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u_int8_t chlim; /* CurHopLimit */
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u_int8_t receivedra;
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} ndi;
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};
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#endif
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struct in6_ndireq {
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char ifname[IFNAMSIZ];
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struct nd_ifinfo ndi;
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};
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struct in6_ndifreq {
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char ifname[IFNAMSIZ];
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u_long ifindex;
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};
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/* Prefix status */
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#define NDPRF_ONLINK 0x1
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#define NDPRF_DETACHED 0x2
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/* protocol constants */
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#define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */
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#define RTR_SOLICITATION_INTERVAL 4 /* 4sec */
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#define MAX_RTR_SOLICITATIONS 3
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#define ND6_INFINITE_LIFETIME 0xffffffff
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#ifdef _KERNEL
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/* node constants */
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#define MAX_REACHABLE_TIME 3600000 /* msec */
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#define REACHABLE_TIME 30000 /* msec */
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#define RETRANS_TIMER 1000 /* msec */
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#define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */
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#define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */
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#define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */
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#define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */
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#define TEMPADDR_REGEN_ADVANCE 5 /* sec */
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#define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */
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#define ND_COMPUTE_RTIME(x) \
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(((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
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((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
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struct nd_defrouter {
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TAILQ_ENTRY(nd_defrouter) dr_entry;
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struct in6_addr rtaddr;
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u_char raflags; /* flags on RA message */
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u_short rtlifetime;
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u_long expire;
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struct ifnet *ifp;
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int installed; /* is installed into kernel routing table */
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u_int refcnt;
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};
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struct nd_prefixctl {
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struct ifnet *ndpr_ifp;
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/* prefix */
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struct sockaddr_in6 ndpr_prefix;
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u_char ndpr_plen;
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u_int32_t ndpr_vltime; /* advertised valid lifetime */
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u_int32_t ndpr_pltime; /* advertised preferred lifetime */
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struct prf_ra ndpr_flags;
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};
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LIST_HEAD(nd_prhead, nd_prefix);
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struct nd_prefix {
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struct ifnet *ndpr_ifp;
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LIST_ENTRY(nd_prefix) ndpr_entry;
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struct sockaddr_in6 ndpr_prefix; /* prefix */
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struct in6_addr ndpr_mask; /* netmask derived from the prefix */
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u_int32_t ndpr_vltime; /* advertised valid lifetime */
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u_int32_t ndpr_pltime; /* advertised preferred lifetime */
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time_t ndpr_expire; /* expiration time of the prefix */
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time_t ndpr_preferred; /* preferred time of the prefix */
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time_t ndpr_lastupdate; /* reception time of last advertisement */
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struct prf_ra ndpr_flags;
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u_int32_t ndpr_stateflags; /* actual state flags */
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/* list of routers that advertise the prefix: */
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LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
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u_char ndpr_plen;
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int ndpr_addrcnt; /* count of derived addresses */
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volatile u_int ndpr_refcnt;
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};
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#define ndpr_raf ndpr_flags
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#define ndpr_raf_onlink ndpr_flags.onlink
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#define ndpr_raf_auto ndpr_flags.autonomous
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#define ndpr_raf_ra_derived ndpr_flags.ra_derived
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#define ndpr_raf_router ndpr_flags.router
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struct nd_pfxrouter {
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LIST_ENTRY(nd_pfxrouter) pfr_entry;
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struct nd_defrouter *router;
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};
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#ifdef MALLOC_DECLARE
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MALLOC_DECLARE(M_IP6NDP);
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#endif
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/* nd6.c */
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VNET_DECLARE(int, nd6_prune);
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VNET_DECLARE(int, nd6_delay);
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VNET_DECLARE(int, nd6_umaxtries);
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VNET_DECLARE(int, nd6_mmaxtries);
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VNET_DECLARE(int, nd6_useloopback);
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VNET_DECLARE(int, nd6_maxnudhint);
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VNET_DECLARE(int, nd6_gctimer);
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VNET_DECLARE(struct nd_prhead, nd_prefix);
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VNET_DECLARE(int, nd6_debug);
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VNET_DECLARE(int, nd6_onlink_ns_rfc4861);
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#define V_nd6_prune VNET(nd6_prune)
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#define V_nd6_delay VNET(nd6_delay)
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#define V_nd6_umaxtries VNET(nd6_umaxtries)
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#define V_nd6_mmaxtries VNET(nd6_mmaxtries)
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#define V_nd6_useloopback VNET(nd6_useloopback)
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#define V_nd6_maxnudhint VNET(nd6_maxnudhint)
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#define V_nd6_gctimer VNET(nd6_gctimer)
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#define V_nd_prefix VNET(nd_prefix)
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#define V_nd6_debug VNET(nd6_debug)
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#define V_nd6_onlink_ns_rfc4861 VNET(nd6_onlink_ns_rfc4861)
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/* Lock for the prefix and default router lists. */
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VNET_DECLARE(struct rwlock, nd6_lock);
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VNET_DECLARE(uint64_t, nd6_list_genid);
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#define V_nd6_lock VNET(nd6_lock)
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#define V_nd6_list_genid VNET(nd6_list_genid)
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#define ND6_RLOCK() rw_rlock(&V_nd6_lock)
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#define ND6_RUNLOCK() rw_runlock(&V_nd6_lock)
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#define ND6_WLOCK() rw_wlock(&V_nd6_lock)
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#define ND6_WUNLOCK() rw_wunlock(&V_nd6_lock)
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#define ND6_TRY_UPGRADE() rw_try_upgrade(&V_nd6_lock)
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#define ND6_WLOCK_ASSERT() rw_assert(&V_nd6_lock, RA_WLOCKED)
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#define ND6_RLOCK_ASSERT() rw_assert(&V_nd6_lock, RA_RLOCKED)
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#define ND6_LOCK_ASSERT() rw_assert(&V_nd6_lock, RA_LOCKED)
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#define ND6_UNLOCK_ASSERT() rw_assert(&V_nd6_lock, RA_UNLOCKED)
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/* Mutex for prefix onlink/offlink transitions. */
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VNET_DECLARE(struct mtx, nd6_onlink_mtx);
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#define V_nd6_onlink_mtx VNET(nd6_onlink_mtx)
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#define ND6_ONLINK_LOCK() mtx_lock(&V_nd6_onlink_mtx)
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#define ND6_ONLINK_TRYLOCK() mtx_trylock(&V_nd6_onlink_mtx)
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#define ND6_ONLINK_UNLOCK() mtx_unlock(&V_nd6_onlink_mtx)
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#define ND6_ONLINK_LOCK_ASSERT() mtx_assert(&V_nd6_onlink_mtx, MA_OWNED)
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#define ND6_ONLINK_UNLOCK_ASSERT() mtx_assert(&V_nd6_onlink_mtx, MA_NOTOWNED)
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#define nd6log(x) do { if (V_nd6_debug) log x; } while (/*CONSTCOND*/ 0)
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/* nd6_rtr.c */
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VNET_DECLARE(int, nd6_defifindex);
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VNET_DECLARE(int, ip6_desync_factor); /* seconds */
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VNET_DECLARE(u_int32_t, ip6_temp_preferred_lifetime); /* seconds */
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VNET_DECLARE(u_int32_t, ip6_temp_valid_lifetime); /* seconds */
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VNET_DECLARE(int, ip6_temp_regen_advance); /* seconds */
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#define V_nd6_defifindex VNET(nd6_defifindex)
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#define V_ip6_desync_factor VNET(ip6_desync_factor)
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#define V_ip6_temp_preferred_lifetime VNET(ip6_temp_preferred_lifetime)
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#define V_ip6_temp_valid_lifetime VNET(ip6_temp_valid_lifetime)
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#define V_ip6_temp_regen_advance VNET(ip6_temp_regen_advance)
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union nd_opts {
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struct nd_opt_hdr *nd_opt_array[16]; /* max = ND_OPT_NONCE */
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struct {
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struct nd_opt_hdr *zero;
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struct nd_opt_hdr *src_lladdr;
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struct nd_opt_hdr *tgt_lladdr;
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struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
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struct nd_opt_rd_hdr *rh;
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struct nd_opt_mtu *mtu;
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struct nd_opt_hdr *__res6;
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struct nd_opt_hdr *__res7;
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struct nd_opt_hdr *__res8;
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struct nd_opt_hdr *__res9;
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struct nd_opt_hdr *__res10;
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struct nd_opt_hdr *__res11;
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struct nd_opt_hdr *__res12;
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struct nd_opt_hdr *__res13;
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struct nd_opt_nonce *nonce;
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struct nd_opt_hdr *__res15;
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struct nd_opt_hdr *search; /* multiple opts */
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struct nd_opt_hdr *last; /* multiple opts */
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int done;
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struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
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} nd_opt_each;
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};
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#define nd_opts_src_lladdr nd_opt_each.src_lladdr
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#define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr
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#define nd_opts_pi nd_opt_each.pi_beg
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#define nd_opts_pi_end nd_opt_each.pi_end
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#define nd_opts_rh nd_opt_each.rh
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#define nd_opts_mtu nd_opt_each.mtu
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#define nd_opts_nonce nd_opt_each.nonce
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#define nd_opts_search nd_opt_each.search
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#define nd_opts_last nd_opt_each.last
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#define nd_opts_done nd_opt_each.done
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/* XXX: need nd6_var.h?? */
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/* nd6.c */
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void nd6_init(void);
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#ifdef VIMAGE
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void nd6_destroy(void);
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#endif
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struct nd_ifinfo *nd6_ifattach(struct ifnet *);
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void nd6_ifdetach(struct ifnet *, struct nd_ifinfo *);
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int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *);
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void nd6_option_init(void *, int, union nd_opts *);
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struct nd_opt_hdr *nd6_option(union nd_opts *);
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int nd6_options(union nd_opts *);
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struct llentry *nd6_lookup(const struct in6_addr *, int, struct ifnet *);
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void nd6_setmtu(struct ifnet *);
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void nd6_llinfo_setstate(struct llentry *lle, int newstate);
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void nd6_timer(void *);
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void nd6_purge(struct ifnet *);
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int nd6_resolve_addr(struct ifnet *ifp, int flags, const struct sockaddr *dst,
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char *desten, uint32_t *pflags);
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int nd6_resolve(struct ifnet *, int, struct mbuf *,
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const struct sockaddr *, u_char *, uint32_t *, struct llentry **);
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int nd6_ioctl(u_long, caddr_t, struct ifnet *);
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void nd6_cache_lladdr(struct ifnet *, struct in6_addr *,
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char *, int, int, int);
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bool nd6_try_set_entry_addr(struct ifnet *ifp, struct llentry *lle, char *lladdr);
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struct mbuf *nd6_grab_holdchain(struct llentry *);
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int nd6_flush_holdchain(struct ifnet *, struct llentry *, struct mbuf *);
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void nd6_flush_children_holdchain(struct ifnet *, struct llentry *);
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int nd6_add_ifa_lle(struct in6_ifaddr *);
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void nd6_rem_ifa_lle(struct in6_ifaddr *, int);
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int nd6_output_ifp(struct ifnet *, struct ifnet *, struct mbuf *,
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struct sockaddr_in6 *, struct route *);
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struct rib_head;
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struct rib_cmd_info;
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void nd6_subscription_cb(struct rib_head *rnh, struct rib_cmd_info *rc,
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void *arg);
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/* nd6_nbr.c */
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void nd6_na_input(struct mbuf *, int, int);
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void nd6_na_output(struct ifnet *, const struct in6_addr *,
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const struct in6_addr *, u_long, int, struct sockaddr *);
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void nd6_ns_input(struct mbuf *, int, int);
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void nd6_ns_output(struct ifnet *, const struct in6_addr *,
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const struct in6_addr *, const struct in6_addr *, uint8_t *);
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caddr_t nd6_ifptomac(struct ifnet *);
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void nd6_dad_init(void);
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void nd6_dad_start(struct ifaddr *, int);
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void nd6_dad_stop(struct ifaddr *);
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/* nd6_rtr.c */
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void nd6_rs_input(struct mbuf *, int, int);
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void nd6_ra_input(struct mbuf *, int, int);
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void nd6_ifnet_link_event(void *, struct ifnet *, int);
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struct nd_defrouter *defrouter_lookup(const struct in6_addr *, struct ifnet *);
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struct nd_defrouter *defrouter_lookup_locked(const struct in6_addr *,
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struct ifnet *);
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void defrouter_reset(void);
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void defrouter_select_fib(int fibnum);
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void defrouter_rele(struct nd_defrouter *);
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bool defrouter_remove(struct in6_addr *, struct ifnet *);
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bool nd6_defrouter_list_empty(void);
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void nd6_defrouter_flush_all(void);
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void nd6_defrouter_purge(struct ifnet *);
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void nd6_defrouter_timer(void);
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void nd6_defrouter_init(void);
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int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *,
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struct nd_prefix **);
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void nd6_prefix_unlink(struct nd_prefix *, struct nd_prhead *);
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void nd6_prefix_del(struct nd_prefix *);
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void nd6_prefix_ref(struct nd_prefix *);
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void nd6_prefix_rele(struct nd_prefix *);
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int nd6_prefix_offlink(struct nd_prefix *);
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void pfxlist_onlink_check(void);
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struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *);
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void rt6_flush(struct in6_addr *, struct ifnet *);
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int nd6_setdefaultiface(int);
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int in6_tmpifadd(const struct in6_ifaddr *, int, int);
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#endif /* _KERNEL */
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#endif /* _NETINET6_ND6_H_ */
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