| 1 | /* $FreeBSD: src/sys/netinet6/nd6.h,v 1.10 2002/04/19 04:46:23 suz Exp $ */ |
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| 2 | /* $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $ */ |
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| 3 | |
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| 4 | /* |
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| 5 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
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| 6 | * All rights reserved. |
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| 7 | * |
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| 8 | * Redistribution and use in source and binary forms, with or without |
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| 9 | * modification, are permitted provided that the following conditions |
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| 10 | * are met: |
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| 11 | * 1. Redistributions of source code must retain the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer. |
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer in the |
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| 15 | * documentation and/or other materials provided with the distribution. |
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| 16 | * 3. Neither the name of the project nor the names of its contributors |
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| 17 | * may be used to endorse or promote products derived from this software |
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| 18 | * without specific prior written permission. |
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| 19 | * |
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| 20 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 30 | * SUCH DAMAGE. |
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| 31 | */ |
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| 32 | |
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| 33 | #ifndef _NETINET6_ND6_H_ |
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| 34 | #define _NETINET6_ND6_H_ |
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| 35 | |
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| 36 | /* see net/route.h, or net/if_inarp.h */ |
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| 37 | #ifndef RTF_ANNOUNCE |
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| 38 | #define RTF_ANNOUNCE RTF_PROTO2 |
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| 39 | #endif |
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| 40 | |
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| 41 | #include <sys/queue.h> |
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| 42 | #include <sys/callout.h> |
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| 43 | |
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| 44 | struct llinfo_nd6 { |
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| 45 | struct llinfo_nd6 *ln_next; |
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| 46 | struct llinfo_nd6 *ln_prev; |
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| 47 | struct rtentry *ln_rt; |
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| 48 | struct mbuf *ln_hold; /* last packet until resolved/timeout */ |
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| 49 | long ln_asked; /* number of queries already sent for this addr */ |
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| 50 | u_long ln_expire; /* lifetime for NDP state transition */ |
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| 51 | short ln_state; /* reachability state */ |
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| 52 | short ln_router; /* 2^0: ND6 router bit */ |
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| 53 | int ln_byhint; /* # of times we made it reachable by UL hint */ |
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| 54 | }; |
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| 55 | |
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| 56 | #define ND6_LLINFO_NOSTATE -2 |
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| 57 | /* |
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| 58 | * We don't need the WAITDELETE state any more, but we keep the definition |
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| 59 | * in a comment line instead of removing it. This is necessary to avoid |
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| 60 | * unintentionally reusing the value for another purpose, which might |
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| 61 | * affect backward compatibility with old applications. |
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| 62 | * (20000711 jinmei@kame.net) |
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| 63 | */ |
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| 64 | /* #define ND6_LLINFO_WAITDELETE -1 */ |
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| 65 | #define ND6_LLINFO_INCOMPLETE 0 |
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| 66 | #define ND6_LLINFO_REACHABLE 1 |
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| 67 | #define ND6_LLINFO_STALE 2 |
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| 68 | #define ND6_LLINFO_DELAY 3 |
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| 69 | #define ND6_LLINFO_PROBE 4 |
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| 70 | |
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| 71 | #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) |
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| 72 | |
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| 73 | struct nd_ifinfo { |
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| 74 | u_int32_t linkmtu; /* LinkMTU */ |
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| 75 | u_int32_t maxmtu; /* Upper bound of LinkMTU */ |
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| 76 | u_int32_t basereachable; /* BaseReachableTime */ |
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| 77 | u_int32_t reachable; /* Reachable Time */ |
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| 78 | u_int32_t retrans; /* Retrans Timer */ |
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| 79 | u_int32_t flags; /* Flags */ |
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| 80 | int recalctm; /* BaseReacable re-calculation timer */ |
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| 81 | u_int8_t chlim; /* CurHopLimit */ |
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| 82 | u_int8_t receivedra; |
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| 83 | /* the following 3 members are for privacy extension for addrconf */ |
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| 84 | u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ |
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| 85 | u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ |
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| 86 | u_int8_t randomid[8]; /* current random ID */ |
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| 87 | }; |
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| 88 | |
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| 89 | #define ND6_IFF_PERFORMNUD 0x1 |
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| 90 | |
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| 91 | struct in6_nbrinfo { |
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| 92 | char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ |
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| 93 | struct in6_addr addr; /* IPv6 address of the neighbor */ |
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| 94 | long asked; /* number of queries already sent for this addr */ |
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| 95 | int isrouter; /* if it acts as a router */ |
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| 96 | int state; /* reachability state */ |
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| 97 | int expire; /* lifetime for NDP state transition */ |
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| 98 | }; |
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| 99 | |
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| 100 | #define DRLSTSIZ 10 |
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| 101 | #define PRLSTSIZ 10 |
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| 102 | struct in6_drlist { |
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| 103 | char ifname[IFNAMSIZ]; |
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| 104 | struct { |
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| 105 | struct in6_addr rtaddr; |
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| 106 | u_char flags; |
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| 107 | u_short rtlifetime; |
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| 108 | u_long expire; |
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| 109 | u_short if_index; |
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| 110 | } defrouter[DRLSTSIZ]; |
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| 111 | }; |
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| 112 | |
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| 113 | struct in6_defrouter { |
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| 114 | struct sockaddr_in6 rtaddr; |
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| 115 | u_char flags; |
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| 116 | u_short rtlifetime; |
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| 117 | u_long expire; |
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| 118 | u_short if_index; |
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| 119 | }; |
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| 120 | |
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| 121 | struct in6_prlist { |
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| 122 | char ifname[IFNAMSIZ]; |
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| 123 | struct { |
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| 124 | struct in6_addr prefix; |
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| 125 | struct prf_ra raflags; |
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| 126 | u_char prefixlen; |
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| 127 | u_char origin; |
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| 128 | u_int32_t vltime; |
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| 129 | u_int32_t pltime; |
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| 130 | time_t expire; |
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| 131 | u_short if_index; |
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| 132 | u_short advrtrs; /* number of advertisement routers */ |
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| 133 | struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ |
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| 134 | } prefix[PRLSTSIZ]; |
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| 135 | }; |
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| 136 | |
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| 137 | struct in6_prefix { |
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| 138 | struct sockaddr_in6 prefix; |
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| 139 | struct prf_ra raflags; |
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| 140 | u_char prefixlen; |
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| 141 | u_char origin; |
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| 142 | u_long vltime; |
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| 143 | u_long pltime; |
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| 144 | u_long expire; |
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| 145 | u_int32_t flags; |
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| 146 | int refcnt; |
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| 147 | u_short if_index; |
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| 148 | u_short advrtrs; /* number of advertisement routers */ |
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| 149 | /* struct sockaddr_in6 advrtr[] */ |
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| 150 | }; |
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| 151 | |
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| 152 | #ifdef _KERNEL |
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| 153 | struct in6_ondireq { |
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| 154 | char ifname[IFNAMSIZ]; |
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| 155 | struct { |
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| 156 | u_int32_t linkmtu; /* LinkMTU */ |
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| 157 | u_int32_t maxmtu; /* Upper bound of LinkMTU */ |
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| 158 | u_int32_t basereachable; /* BaseReachableTime */ |
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| 159 | u_int32_t reachable; /* Reachable Time */ |
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| 160 | u_int32_t retrans; /* Retrans Timer */ |
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| 161 | u_int32_t flags; /* Flags */ |
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| 162 | int recalctm; /* BaseReacable re-calculation timer */ |
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| 163 | u_int8_t chlim; /* CurHopLimit */ |
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| 164 | u_int8_t receivedra; |
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| 165 | } ndi; |
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| 166 | }; |
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| 167 | #endif |
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| 168 | |
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| 169 | struct in6_ndireq { |
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| 170 | char ifname[IFNAMSIZ]; |
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| 171 | struct nd_ifinfo ndi; |
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| 172 | }; |
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| 173 | |
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| 174 | struct in6_ndifreq { |
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| 175 | char ifname[IFNAMSIZ]; |
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| 176 | u_long ifindex; |
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| 177 | }; |
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| 178 | |
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| 179 | /* Prefix status */ |
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| 180 | #define NDPRF_ONLINK 0x1 |
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| 181 | #define NDPRF_DETACHED 0x2 |
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| 182 | |
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| 183 | /* protocol constants */ |
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| 184 | #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ |
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| 185 | #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ |
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| 186 | #define MAX_RTR_SOLICITATIONS 3 |
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| 187 | |
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| 188 | #define ND6_INFINITE_LIFETIME 0xffffffff |
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| 189 | |
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| 190 | #ifdef _KERNEL |
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| 191 | /* node constants */ |
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| 192 | #define MAX_REACHABLE_TIME 3600000 /* msec */ |
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| 193 | #define REACHABLE_TIME 30000 /* msec */ |
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| 194 | #define RETRANS_TIMER 1000 /* msec */ |
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| 195 | #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ |
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| 196 | #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ |
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| 197 | #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ |
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| 198 | #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ |
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| 199 | #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ |
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| 200 | #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ |
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| 201 | #define ND_COMPUTE_RTIME(x) \ |
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| 202 | (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \ |
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| 203 | ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) |
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| 204 | |
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| 205 | TAILQ_HEAD(nd_drhead, nd_defrouter); |
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| 206 | struct nd_defrouter { |
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| 207 | TAILQ_ENTRY(nd_defrouter) dr_entry; |
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| 208 | struct in6_addr rtaddr; |
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| 209 | u_char flags; /* flags on RA message */ |
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| 210 | u_short rtlifetime; |
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| 211 | u_long expire; |
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| 212 | u_long advint; /* Mobile IPv6 addition (milliseconds) */ |
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| 213 | u_long advint_expire; /* Mobile IPv6 addition */ |
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| 214 | int advints_lost; /* Mobile IPv6 addition */ |
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| 215 | struct ifnet *ifp; |
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| 216 | }; |
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| 217 | |
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| 218 | struct nd_prefix { |
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| 219 | struct ifnet *ndpr_ifp; |
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| 220 | LIST_ENTRY(nd_prefix) ndpr_entry; |
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| 221 | struct sockaddr_in6 ndpr_prefix; /* prefix */ |
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| 222 | struct in6_addr ndpr_mask; /* netmask derived from the prefix */ |
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| 223 | struct in6_addr ndpr_addr; /* address that is derived from the prefix */ |
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| 224 | u_int32_t ndpr_vltime; /* advertised valid lifetime */ |
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| 225 | u_int32_t ndpr_pltime; /* advertised preferred lifetime */ |
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| 226 | time_t ndpr_expire; /* expiration time of the prefix */ |
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| 227 | time_t ndpr_preferred; /* preferred time of the prefix */ |
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| 228 | struct prf_ra ndpr_flags; |
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| 229 | u_int32_t ndpr_stateflags; /* actual state flags */ |
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| 230 | /* list of routers that advertise the prefix: */ |
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| 231 | LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; |
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| 232 | u_char ndpr_plen; |
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| 233 | int ndpr_refcnt; /* reference couter from addresses */ |
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| 234 | }; |
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| 235 | |
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| 236 | #define ndpr_next ndpr_entry.le_next |
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| 237 | |
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| 238 | #define ndpr_raf ndpr_flags |
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| 239 | #define ndpr_raf_onlink ndpr_flags.onlink |
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| 240 | #define ndpr_raf_auto ndpr_flags.autonomous |
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| 241 | |
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| 242 | /* |
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| 243 | * We keep expired prefix for certain amount of time, for validation purposes. |
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| 244 | * 1800s = MaxRtrAdvInterval |
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| 245 | */ |
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| 246 | #define NDPR_KEEP_EXPIRED (1800 * 2) |
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| 247 | |
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| 248 | /* |
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| 249 | * Message format for use in obtaining information about prefixes |
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| 250 | * from inet6 sysctl function |
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| 251 | */ |
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| 252 | struct inet6_ndpr_msghdr { |
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| 253 | u_short inpm_msglen; /* to skip over non-understood messages */ |
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| 254 | u_char inpm_version; /* future binary compatibility */ |
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| 255 | u_char inpm_type; /* message type */ |
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| 256 | struct in6_addr inpm_prefix; |
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| 257 | u_long prm_vltim; |
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| 258 | u_long prm_pltime; |
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| 259 | u_long prm_expire; |
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| 260 | u_long prm_preferred; |
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| 261 | struct in6_prflags prm_flags; |
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| 262 | u_short prm_index; /* index for associated ifp */ |
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| 263 | u_char prm_plen; /* length of prefix in bits */ |
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| 264 | }; |
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| 265 | |
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| 266 | #define prm_raf_onlink prm_flags.prf_ra.onlink |
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| 267 | #define prm_raf_auto prm_flags.prf_ra.autonomous |
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| 268 | |
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| 269 | #define prm_statef_onlink prm_flags.prf_state.onlink |
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| 270 | |
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| 271 | #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid |
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| 272 | #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd |
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| 273 | |
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| 274 | #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) |
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| 275 | #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) |
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| 276 | |
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| 277 | struct nd_pfxrouter { |
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| 278 | LIST_ENTRY(nd_pfxrouter) pfr_entry; |
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| 279 | #define pfr_next pfr_entry.le_next |
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| 280 | struct nd_defrouter *router; |
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| 281 | }; |
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| 282 | |
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| 283 | LIST_HEAD(nd_prhead, nd_prefix); |
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| 284 | |
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| 285 | /* nd6.c */ |
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| 286 | extern int nd6_prune; |
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| 287 | extern int nd6_delay; |
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| 288 | extern int nd6_umaxtries; |
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| 289 | extern int nd6_mmaxtries; |
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| 290 | extern int nd6_useloopback; |
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| 291 | extern int nd6_maxnudhint; |
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| 292 | extern int nd6_gctimer; |
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| 293 | extern struct llinfo_nd6 llinfo_nd6; |
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| 294 | extern struct nd_ifinfo *nd_ifinfo; |
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| 295 | extern struct nd_drhead nd_defrouter; |
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| 296 | extern struct nd_prhead nd_prefix; |
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| 297 | extern int nd6_debug; |
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| 298 | |
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| 299 | #define nd6log(x) do { if (nd6_debug) log x; } while (0) |
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| 300 | |
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| 301 | extern struct callout nd6_timer_ch; |
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| 302 | |
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| 303 | /* nd6_rtr.c */ |
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| 304 | extern int nd6_defifindex; |
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| 305 | extern int ip6_desync_factor; /* seconds */ |
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| 306 | extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */ |
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| 307 | extern u_int32_t ip6_temp_valid_lifetime; /* seconds */ |
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| 308 | extern int ip6_temp_regen_advance; /* seconds */ |
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| 309 | |
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| 310 | union nd_opts { |
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| 311 | struct nd_opt_hdr *nd_opt_array[9]; /* max = home agent info */ |
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| 312 | struct { |
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| 313 | struct nd_opt_hdr *zero; |
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| 314 | struct nd_opt_hdr *src_lladdr; |
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| 315 | struct nd_opt_hdr *tgt_lladdr; |
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| 316 | struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ |
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| 317 | struct nd_opt_rd_hdr *rh; |
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| 318 | struct nd_opt_mtu *mtu; |
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| 319 | struct nd_opt_hdr *six; |
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| 320 | struct nd_opt_advint *adv; |
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| 321 | struct nd_opt_hai *hai; |
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| 322 | struct nd_opt_hdr *search; /* multiple opts */ |
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| 323 | struct nd_opt_hdr *last; /* multiple opts */ |
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| 324 | int done; |
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| 325 | struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ |
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| 326 | } nd_opt_each; |
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| 327 | }; |
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| 328 | #define nd_opts_src_lladdr nd_opt_each.src_lladdr |
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| 329 | #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr |
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| 330 | #define nd_opts_pi nd_opt_each.pi_beg |
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| 331 | #define nd_opts_pi_end nd_opt_each.pi_end |
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| 332 | #define nd_opts_rh nd_opt_each.rh |
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| 333 | #define nd_opts_mtu nd_opt_each.mtu |
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| 334 | #define nd_opts_adv nd_opt_each.adv |
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| 335 | #define nd_opts_hai nd_opt_each.hai |
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| 336 | #define nd_opts_search nd_opt_each.search |
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| 337 | #define nd_opts_last nd_opt_each.last |
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| 338 | #define nd_opts_done nd_opt_each.done |
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| 339 | |
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| 340 | /* XXX: need nd6_var.h?? */ |
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| 341 | /* nd6.c */ |
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| 342 | void nd6_init __P((void)); |
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| 343 | void nd6_ifattach __P((struct ifnet *)); |
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| 344 | int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *)); |
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| 345 | void nd6_option_init __P((void *, int, union nd_opts *)); |
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| 346 | struct nd_opt_hdr *nd6_option __P((union nd_opts *)); |
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| 347 | int nd6_options __P((union nd_opts *)); |
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| 348 | struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); |
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| 349 | void nd6_setmtu __P((struct ifnet *)); |
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| 350 | void nd6_timer __P((void *)); |
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| 351 | void nd6_purge __P((struct ifnet *)); |
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| 352 | struct llinfo_nd6 *nd6_free __P((struct rtentry *)); |
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| 353 | void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int)); |
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| 354 | int nd6_resolve __P((struct ifnet *, struct rtentry *, |
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| 355 | struct mbuf *, struct sockaddr *, u_char *)); |
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| 356 | void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); |
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| 357 | int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); |
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| 358 | struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, |
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| 359 | char *, int, int, int)); |
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| 360 | int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *, |
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| 361 | struct sockaddr_in6 *, struct rtentry *)); |
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| 362 | int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, |
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| 363 | struct sockaddr *, u_char *)); |
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| 364 | int nd6_need_cache __P((struct ifnet *)); |
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| 365 | |
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| 366 | /* nd6_nbr.c */ |
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| 367 | void nd6_na_input __P((struct mbuf *, int, int)); |
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| 368 | void nd6_na_output __P((struct ifnet *, const struct in6_addr *, |
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| 369 | const struct in6_addr *, u_long, int, struct sockaddr *)); |
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| 370 | void nd6_ns_input __P((struct mbuf *, int, int)); |
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| 371 | void nd6_ns_output __P((struct ifnet *, const struct in6_addr *, |
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| 372 | const struct in6_addr *, struct llinfo_nd6 *, int)); |
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| 373 | caddr_t nd6_ifptomac __P((struct ifnet *)); |
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| 374 | void nd6_dad_start __P((struct ifaddr *, int *)); |
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| 375 | void nd6_dad_stop __P((struct ifaddr *)); |
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| 376 | void nd6_dad_duplicated __P((struct ifaddr *)); |
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| 377 | |
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| 378 | /* nd6_rtr.c */ |
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| 379 | void nd6_rs_input __P((struct mbuf *, int, int)); |
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| 380 | void nd6_ra_input __P((struct mbuf *, int, int)); |
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| 381 | void prelist_del __P((struct nd_prefix *)); |
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| 382 | void defrouter_addreq __P((struct nd_defrouter *)); |
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| 383 | void defrouter_delreq __P((struct nd_defrouter *, int)); |
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| 384 | void defrouter_select __P((void)); |
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| 385 | void defrtrlist_del __P((struct nd_defrouter *)); |
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| 386 | void prelist_remove __P((struct nd_prefix *)); |
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| 387 | int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, |
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| 388 | struct mbuf *)); |
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| 389 | int nd6_prelist_add __P((struct nd_prefix *, struct nd_defrouter *, |
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| 390 | struct nd_prefix **)); |
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| 391 | int nd6_prefix_onlink __P((struct nd_prefix *)); |
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| 392 | int nd6_prefix_offlink __P((struct nd_prefix *)); |
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| 393 | void pfxlist_onlink_check __P((void)); |
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| 394 | struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, |
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| 395 | struct ifnet *)); |
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| 396 | struct nd_prefix *nd6_prefix_lookup __P((struct nd_prefix *)); |
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| 397 | int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); |
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| 398 | void rt6_flush __P((struct in6_addr *, struct ifnet *)); |
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| 399 | int nd6_setdefaultiface __P((int)); |
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| 400 | int in6_tmpifadd __P((const struct in6_ifaddr *, int)); |
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| 401 | |
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| 402 | #endif /* _KERNEL */ |
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| 403 | |
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| 404 | #endif /* _NETINET6_ND6_H_ */ |
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