The Design and Implementation of the FreeBSD Operating System, Second Edition
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sys/netinet/icmp6.h

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    1 /*      $FreeBSD: releng/8.2/sys/netinet/icmp6.h 207695 2010-05-06 06:44:19Z bz $       */
    2 /*      $KAME: icmp6.h,v 1.46 2001/04/27 15:09:48 itojun Exp $  */
    3 
    4 /*-
    5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the project nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 /*-
   34  * Copyright (c) 1982, 1986, 1993
   35  *      The Regents of the University of California.  All rights reserved.
   36  *
   37  * Redistribution and use in source and binary forms, with or without
   38  * modification, are permitted provided that the following conditions
   39  * are met:
   40  * 1. Redistributions of source code must retain the above copyright
   41  *    notice, this list of conditions and the following disclaimer.
   42  * 2. Redistributions in binary form must reproduce the above copyright
   43  *    notice, this list of conditions and the following disclaimer in the
   44  *    documentation and/or other materials provided with the distribution.
   45  * 4. Neither the name of the University nor the names of its contributors
   46  *    may be used to endorse or promote products derived from this software
   47  *    without specific prior written permission.
   48  *
   49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   59  * SUCH DAMAGE.
   60  *
   61  *      @(#)ip_icmp.h   8.1 (Berkeley) 6/10/93
   62  */
   63 
   64 #ifndef _NETINET_ICMP6_H_
   65 #define _NETINET_ICMP6_H_
   66 
   67 #define ICMPV6_PLD_MAXLEN       1232    /* IPV6_MMTU - sizeof(struct ip6_hdr)
   68                                            - sizeof(struct icmp6_hdr) */
   69 
   70 struct icmp6_hdr {
   71         u_int8_t        icmp6_type;     /* type field */
   72         u_int8_t        icmp6_code;     /* code field */
   73         u_int16_t       icmp6_cksum;    /* checksum field */
   74         union {
   75                 u_int32_t       icmp6_un_data32[1]; /* type-specific field */
   76                 u_int16_t       icmp6_un_data16[2]; /* type-specific field */
   77                 u_int8_t        icmp6_un_data8[4];  /* type-specific field */
   78         } icmp6_dataun;
   79 } __packed;
   80 
   81 #define icmp6_data32    icmp6_dataun.icmp6_un_data32
   82 #define icmp6_data16    icmp6_dataun.icmp6_un_data16
   83 #define icmp6_data8     icmp6_dataun.icmp6_un_data8
   84 #define icmp6_pptr      icmp6_data32[0]         /* parameter prob */
   85 #define icmp6_mtu       icmp6_data32[0]         /* packet too big */
   86 #define icmp6_id        icmp6_data16[0]         /* echo request/reply */
   87 #define icmp6_seq       icmp6_data16[1]         /* echo request/reply */
   88 #define icmp6_maxdelay  icmp6_data16[0]         /* mcast group membership */
   89 
   90 #define ICMP6_DST_UNREACH               1       /* dest unreachable, codes: */
   91 #define ICMP6_PACKET_TOO_BIG            2       /* packet too big */
   92 #define ICMP6_TIME_EXCEEDED             3       /* time exceeded, code: */
   93 #define ICMP6_PARAM_PROB                4       /* ip6 header bad */
   94 
   95 #define ICMP6_ECHO_REQUEST              128     /* echo service */
   96 #define ICMP6_ECHO_REPLY                129     /* echo reply */
   97 #define MLD_LISTENER_QUERY              130     /* multicast listener query */
   98 #define MLD_LISTENER_REPORT             131     /* multicast listener report */
   99 #define MLD_LISTENER_DONE               132     /* multicast listener done */
  100 #define MLD_LISTENER_REDUCTION MLD_LISTENER_DONE /* RFC3542 definition */
  101 
  102 /* RFC2292 decls */
  103 #define ICMP6_MEMBERSHIP_QUERY          130     /* group membership query */
  104 #define ICMP6_MEMBERSHIP_REPORT         131     /* group membership report */
  105 #define ICMP6_MEMBERSHIP_REDUCTION      132     /* group membership termination */
  106 
  107 #ifndef _KERNEL
  108 /* the followings are for backward compatibility to old KAME apps. */
  109 #define MLD6_LISTENER_QUERY     MLD_LISTENER_QUERY
  110 #define MLD6_LISTENER_REPORT    MLD_LISTENER_REPORT
  111 #define MLD6_LISTENER_DONE      MLD_LISTENER_DONE
  112 #endif
  113 
  114 #define ND_ROUTER_SOLICIT               133     /* router solicitation */
  115 #define ND_ROUTER_ADVERT                134     /* router advertisement */
  116 #define ND_NEIGHBOR_SOLICIT             135     /* neighbor solicitation */
  117 #define ND_NEIGHBOR_ADVERT              136     /* neighbor advertisement */
  118 #define ND_REDIRECT                     137     /* redirect */
  119 
  120 #define ICMP6_ROUTER_RENUMBERING        138     /* router renumbering */
  121 
  122 #define ICMP6_WRUREQUEST                139     /* who are you request */
  123 #define ICMP6_WRUREPLY                  140     /* who are you reply */
  124 #define ICMP6_FQDN_QUERY                139     /* FQDN query */
  125 #define ICMP6_FQDN_REPLY                140     /* FQDN reply */
  126 #define ICMP6_NI_QUERY                  139     /* node information request */
  127 #define ICMP6_NI_REPLY                  140     /* node information reply */
  128 #define MLDV2_LISTENER_REPORT           143     /* RFC3810 listener report */
  129 
  130 /* The definitions below are experimental. TBA */
  131 #define MLD_MTRACE_RESP                 200     /* mtrace resp (to sender) */
  132 #define MLD_MTRACE                      201     /* mtrace messages */
  133 
  134 #ifndef _KERNEL
  135 #define MLD6_MTRACE_RESP        MLD_MTRACE_RESP
  136 #define MLD6_MTRACE             MLD_MTRACE
  137 #endif
  138 
  139 #define ICMP6_MAXTYPE                   201
  140 
  141 #define ICMP6_DST_UNREACH_NOROUTE       0       /* no route to destination */
  142 #define ICMP6_DST_UNREACH_ADMIN         1       /* administratively prohibited */
  143 #define ICMP6_DST_UNREACH_NOTNEIGHBOR   2       /* not a neighbor(obsolete) */
  144 #define ICMP6_DST_UNREACH_BEYONDSCOPE   2       /* beyond scope of source address */
  145 #define ICMP6_DST_UNREACH_ADDR          3       /* address unreachable */
  146 #define ICMP6_DST_UNREACH_NOPORT        4       /* port unreachable */
  147 
  148 #define ICMP6_TIME_EXCEED_TRANSIT       0       /* ttl==0 in transit */
  149 #define ICMP6_TIME_EXCEED_REASSEMBLY    1       /* ttl==0 in reass */
  150 
  151 #define ICMP6_PARAMPROB_HEADER          0       /* erroneous header field */
  152 #define ICMP6_PARAMPROB_NEXTHEADER      1       /* unrecognized next header */
  153 #define ICMP6_PARAMPROB_OPTION          2       /* unrecognized option */
  154 
  155 #define ICMP6_INFOMSG_MASK              0x80    /* all informational messages */
  156 
  157 #define ICMP6_NI_SUBJ_IPV6      0       /* Query Subject is an IPv6 address */
  158 #define ICMP6_NI_SUBJ_FQDN      1       /* Query Subject is a Domain name */
  159 #define ICMP6_NI_SUBJ_IPV4      2       /* Query Subject is an IPv4 address */
  160 
  161 #define ICMP6_NI_SUCCESS        0       /* node information successful reply */
  162 #define ICMP6_NI_REFUSED        1       /* node information request is refused */
  163 #define ICMP6_NI_UNKNOWN        2       /* unknown Qtype */
  164 
  165 #define ICMP6_ROUTER_RENUMBERING_COMMAND  0     /* rr command */
  166 #define ICMP6_ROUTER_RENUMBERING_RESULT   1     /* rr result */
  167 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255     /* rr seq num reset */
  168 
  169 /* Used in kernel only */
  170 #define ND_REDIRECT_ONLINK      0       /* redirect to an on-link node */
  171 #define ND_REDIRECT_ROUTER      1       /* redirect to a better router */
  172 
  173 /*
  174  * Multicast Listener Discovery
  175  */
  176 struct mld_hdr {
  177         struct icmp6_hdr        mld_icmp6_hdr;
  178         struct in6_addr         mld_addr; /* multicast address */
  179 } __packed;
  180 
  181 /* definitions to provide backward compatibility to old KAME applications */
  182 #ifndef _KERNEL
  183 #define mld6_hdr        mld_hdr
  184 #define mld6_type       mld_type
  185 #define mld6_code       mld_code
  186 #define mld6_cksum      mld_cksum
  187 #define mld6_maxdelay   mld_maxdelay
  188 #define mld6_reserved   mld_reserved
  189 #define mld6_addr       mld_addr
  190 #endif
  191 
  192 /* shortcut macro definitions */
  193 #define mld_type        mld_icmp6_hdr.icmp6_type
  194 #define mld_code        mld_icmp6_hdr.icmp6_code
  195 #define mld_cksum       mld_icmp6_hdr.icmp6_cksum
  196 #define mld_maxdelay    mld_icmp6_hdr.icmp6_data16[0]
  197 #define mld_reserved    mld_icmp6_hdr.icmp6_data16[1]
  198 #define mld_v2_reserved mld_icmp6_hdr.icmp6_data16[0]
  199 #define mld_v2_numrecs  mld_icmp6_hdr.icmp6_data16[1]
  200 
  201 /*
  202  * Neighbor Discovery
  203  */
  204 
  205 struct nd_router_solicit {      /* router solicitation */
  206         struct icmp6_hdr        nd_rs_hdr;
  207         /* could be followed by options */
  208 } __packed;
  209 
  210 #define nd_rs_type      nd_rs_hdr.icmp6_type
  211 #define nd_rs_code      nd_rs_hdr.icmp6_code
  212 #define nd_rs_cksum     nd_rs_hdr.icmp6_cksum
  213 #define nd_rs_reserved  nd_rs_hdr.icmp6_data32[0]
  214 
  215 struct nd_router_advert {       /* router advertisement */
  216         struct icmp6_hdr        nd_ra_hdr;
  217         u_int32_t               nd_ra_reachable;        /* reachable time */
  218         u_int32_t               nd_ra_retransmit;       /* retransmit timer */
  219         /* could be followed by options */
  220 } __packed;
  221 
  222 #define nd_ra_type              nd_ra_hdr.icmp6_type
  223 #define nd_ra_code              nd_ra_hdr.icmp6_code
  224 #define nd_ra_cksum             nd_ra_hdr.icmp6_cksum
  225 #define nd_ra_curhoplimit       nd_ra_hdr.icmp6_data8[0]
  226 #define nd_ra_flags_reserved    nd_ra_hdr.icmp6_data8[1]
  227 #define ND_RA_FLAG_MANAGED      0x80
  228 #define ND_RA_FLAG_OTHER        0x40
  229 #define ND_RA_FLAG_HA           0x20
  230 
  231 /*
  232  * Router preference values based on draft-draves-ipngwg-router-selection-01.
  233  * These are non-standard definitions.
  234  */
  235 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
  236 
  237 #define ND_RA_FLAG_RTPREF_HIGH  0x08 /* 00001000 */
  238 #define ND_RA_FLAG_RTPREF_MEDIUM        0x00 /* 00000000 */
  239 #define ND_RA_FLAG_RTPREF_LOW   0x18 /* 00011000 */
  240 #define ND_RA_FLAG_RTPREF_RSV   0x10 /* 00010000 */
  241 
  242 #define nd_ra_router_lifetime   nd_ra_hdr.icmp6_data16[1]
  243 
  244 struct nd_neighbor_solicit {    /* neighbor solicitation */
  245         struct icmp6_hdr        nd_ns_hdr;
  246         struct in6_addr         nd_ns_target;   /*target address */
  247         /* could be followed by options */
  248 } __packed;
  249 
  250 #define nd_ns_type              nd_ns_hdr.icmp6_type
  251 #define nd_ns_code              nd_ns_hdr.icmp6_code
  252 #define nd_ns_cksum             nd_ns_hdr.icmp6_cksum
  253 #define nd_ns_reserved          nd_ns_hdr.icmp6_data32[0]
  254 
  255 struct nd_neighbor_advert {     /* neighbor advertisement */
  256         struct icmp6_hdr        nd_na_hdr;
  257         struct in6_addr         nd_na_target;   /* target address */
  258         /* could be followed by options */
  259 } __packed;
  260 
  261 #define nd_na_type              nd_na_hdr.icmp6_type
  262 #define nd_na_code              nd_na_hdr.icmp6_code
  263 #define nd_na_cksum             nd_na_hdr.icmp6_cksum
  264 #define nd_na_flags_reserved    nd_na_hdr.icmp6_data32[0]
  265 #if BYTE_ORDER == BIG_ENDIAN
  266 #define ND_NA_FLAG_ROUTER               0x80000000
  267 #define ND_NA_FLAG_SOLICITED            0x40000000
  268 #define ND_NA_FLAG_OVERRIDE             0x20000000
  269 #else
  270 #if BYTE_ORDER == LITTLE_ENDIAN
  271 #define ND_NA_FLAG_ROUTER               0x80
  272 #define ND_NA_FLAG_SOLICITED            0x40
  273 #define ND_NA_FLAG_OVERRIDE             0x20
  274 #endif
  275 #endif
  276 
  277 struct nd_redirect {            /* redirect */
  278         struct icmp6_hdr        nd_rd_hdr;
  279         struct in6_addr         nd_rd_target;   /* target address */
  280         struct in6_addr         nd_rd_dst;      /* destination address */
  281         /* could be followed by options */
  282 } __packed;
  283 
  284 #define nd_rd_type              nd_rd_hdr.icmp6_type
  285 #define nd_rd_code              nd_rd_hdr.icmp6_code
  286 #define nd_rd_cksum             nd_rd_hdr.icmp6_cksum
  287 #define nd_rd_reserved          nd_rd_hdr.icmp6_data32[0]
  288 
  289 struct nd_opt_hdr {             /* Neighbor discovery option header */
  290         u_int8_t        nd_opt_type;
  291         u_int8_t        nd_opt_len;
  292         /* followed by option specific data*/
  293 } __packed;
  294 
  295 #define ND_OPT_SOURCE_LINKADDR          1
  296 #define ND_OPT_TARGET_LINKADDR          2
  297 #define ND_OPT_PREFIX_INFORMATION       3
  298 #define ND_OPT_REDIRECTED_HEADER        4
  299 #define ND_OPT_MTU                      5
  300 
  301 #define ND_OPT_ROUTE_INFO               200     /* draft-ietf-ipngwg-router-preference, not officially assigned yet */
  302 
  303 struct nd_opt_prefix_info {     /* prefix information */
  304         u_int8_t        nd_opt_pi_type;
  305         u_int8_t        nd_opt_pi_len;
  306         u_int8_t        nd_opt_pi_prefix_len;
  307         u_int8_t        nd_opt_pi_flags_reserved;
  308         u_int32_t       nd_opt_pi_valid_time;
  309         u_int32_t       nd_opt_pi_preferred_time;
  310         u_int32_t       nd_opt_pi_reserved2;
  311         struct in6_addr nd_opt_pi_prefix;
  312 } __packed;
  313 
  314 #define ND_OPT_PI_FLAG_ONLINK           0x80
  315 #define ND_OPT_PI_FLAG_AUTO             0x40
  316 
  317 struct nd_opt_rd_hdr {          /* redirected header */
  318         u_int8_t        nd_opt_rh_type;
  319         u_int8_t        nd_opt_rh_len;
  320         u_int16_t       nd_opt_rh_reserved1;
  321         u_int32_t       nd_opt_rh_reserved2;
  322         /* followed by IP header and data */
  323 } __packed;
  324 
  325 struct nd_opt_mtu {             /* MTU option */
  326         u_int8_t        nd_opt_mtu_type;
  327         u_int8_t        nd_opt_mtu_len;
  328         u_int16_t       nd_opt_mtu_reserved;
  329         u_int32_t       nd_opt_mtu_mtu;
  330 } __packed;
  331 
  332 struct nd_opt_route_info {      /* route info */
  333         u_int8_t        nd_opt_rti_type;
  334         u_int8_t        nd_opt_rti_len;
  335         u_int8_t        nd_opt_rti_prefixlen;
  336         u_int8_t        nd_opt_rti_flags;
  337         u_int32_t       nd_opt_rti_lifetime;
  338         /* prefix follows */
  339 } __packed;
  340 
  341 /*
  342  * icmp6 namelookup
  343  */
  344 
  345 struct icmp6_namelookup {
  346         struct icmp6_hdr        icmp6_nl_hdr;
  347         u_int8_t        icmp6_nl_nonce[8];
  348         int32_t         icmp6_nl_ttl;
  349 #if 0
  350         u_int8_t        icmp6_nl_len;
  351         u_int8_t        icmp6_nl_name[3];
  352 #endif
  353         /* could be followed by options */
  354 } __packed;
  355 
  356 /*
  357  * icmp6 node information
  358  */
  359 struct icmp6_nodeinfo {
  360         struct icmp6_hdr icmp6_ni_hdr;
  361         u_int8_t icmp6_ni_nonce[8];
  362         /* could be followed by reply data */
  363 } __packed;
  364 
  365 #define ni_type         icmp6_ni_hdr.icmp6_type
  366 #define ni_code         icmp6_ni_hdr.icmp6_code
  367 #define ni_cksum        icmp6_ni_hdr.icmp6_cksum
  368 #define ni_qtype        icmp6_ni_hdr.icmp6_data16[0]
  369 #define ni_flags        icmp6_ni_hdr.icmp6_data16[1]
  370 
  371 #define NI_QTYPE_NOOP           0 /* NOOP  */
  372 #define NI_QTYPE_SUPTYPES       1 /* Supported Qtypes */
  373 #define NI_QTYPE_FQDN           2 /* FQDN (draft 04) */
  374 #define NI_QTYPE_DNSNAME        2 /* DNS Name */
  375 #define NI_QTYPE_NODEADDR       3 /* Node Addresses */
  376 #define NI_QTYPE_IPV4ADDR       4 /* IPv4 Addresses */
  377 
  378 #if BYTE_ORDER == BIG_ENDIAN
  379 #define NI_SUPTYPE_FLAG_COMPRESS        0x1
  380 #define NI_FQDN_FLAG_VALIDTTL           0x1
  381 #elif BYTE_ORDER == LITTLE_ENDIAN
  382 #define NI_SUPTYPE_FLAG_COMPRESS        0x0100
  383 #define NI_FQDN_FLAG_VALIDTTL           0x0100
  384 #endif
  385 
  386 #ifdef NAME_LOOKUPS_04
  387 #if BYTE_ORDER == BIG_ENDIAN
  388 #define NI_NODEADDR_FLAG_LINKLOCAL      0x1
  389 #define NI_NODEADDR_FLAG_SITELOCAL      0x2
  390 #define NI_NODEADDR_FLAG_GLOBAL         0x4
  391 #define NI_NODEADDR_FLAG_ALL            0x8
  392 #define NI_NODEADDR_FLAG_TRUNCATE       0x10
  393 #define NI_NODEADDR_FLAG_ANYCAST        0x20 /* just experimental. not in spec */
  394 #elif BYTE_ORDER == LITTLE_ENDIAN
  395 #define NI_NODEADDR_FLAG_LINKLOCAL      0x0100
  396 #define NI_NODEADDR_FLAG_SITELOCAL      0x0200
  397 #define NI_NODEADDR_FLAG_GLOBAL         0x0400
  398 #define NI_NODEADDR_FLAG_ALL            0x0800
  399 #define NI_NODEADDR_FLAG_TRUNCATE       0x1000
  400 #define NI_NODEADDR_FLAG_ANYCAST        0x2000 /* just experimental. not in spec */
  401 #endif
  402 #else  /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
  403 #if BYTE_ORDER == BIG_ENDIAN
  404 #define NI_NODEADDR_FLAG_TRUNCATE       0x1
  405 #define NI_NODEADDR_FLAG_ALL            0x2
  406 #define NI_NODEADDR_FLAG_COMPAT         0x4
  407 #define NI_NODEADDR_FLAG_LINKLOCAL      0x8
  408 #define NI_NODEADDR_FLAG_SITELOCAL      0x10
  409 #define NI_NODEADDR_FLAG_GLOBAL         0x20
  410 #define NI_NODEADDR_FLAG_ANYCAST        0x40 /* just experimental. not in spec */
  411 #elif BYTE_ORDER == LITTLE_ENDIAN
  412 #define NI_NODEADDR_FLAG_TRUNCATE       0x0100
  413 #define NI_NODEADDR_FLAG_ALL            0x0200
  414 #define NI_NODEADDR_FLAG_COMPAT         0x0400
  415 #define NI_NODEADDR_FLAG_LINKLOCAL      0x0800
  416 #define NI_NODEADDR_FLAG_SITELOCAL      0x1000
  417 #define NI_NODEADDR_FLAG_GLOBAL         0x2000
  418 #define NI_NODEADDR_FLAG_ANYCAST        0x4000 /* just experimental. not in spec */
  419 #endif
  420 #endif
  421 
  422 struct ni_reply_fqdn {
  423         u_int32_t ni_fqdn_ttl;  /* TTL */
  424         u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
  425         u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
  426 } __packed;
  427 
  428 /*
  429  * Router Renumbering. as router-renum-08.txt
  430  */
  431 struct icmp6_router_renum {     /* router renumbering header */
  432         struct icmp6_hdr        rr_hdr;
  433         u_int8_t        rr_segnum;
  434         u_int8_t        rr_flags;
  435         u_int16_t       rr_maxdelay;
  436         u_int32_t       rr_reserved;
  437 } __packed;
  438 
  439 #define ICMP6_RR_FLAGS_TEST             0x80
  440 #define ICMP6_RR_FLAGS_REQRESULT        0x40
  441 #define ICMP6_RR_FLAGS_FORCEAPPLY       0x20
  442 #define ICMP6_RR_FLAGS_SPECSITE         0x10
  443 #define ICMP6_RR_FLAGS_PREVDONE         0x08
  444 
  445 #define rr_type         rr_hdr.icmp6_type
  446 #define rr_code         rr_hdr.icmp6_code
  447 #define rr_cksum        rr_hdr.icmp6_cksum
  448 #define rr_seqnum       rr_hdr.icmp6_data32[0]
  449 
  450 struct rr_pco_match {           /* match prefix part */
  451         u_int8_t        rpm_code;
  452         u_int8_t        rpm_len;
  453         u_int8_t        rpm_ordinal;
  454         u_int8_t        rpm_matchlen;
  455         u_int8_t        rpm_minlen;
  456         u_int8_t        rpm_maxlen;
  457         u_int16_t       rpm_reserved;
  458         struct  in6_addr        rpm_prefix;
  459 } __packed;
  460 
  461 #define RPM_PCO_ADD             1
  462 #define RPM_PCO_CHANGE          2
  463 #define RPM_PCO_SETGLOBAL       3
  464 #define RPM_PCO_MAX             4
  465 
  466 struct rr_pco_use {             /* use prefix part */
  467         u_int8_t        rpu_uselen;
  468         u_int8_t        rpu_keeplen;
  469         u_int8_t        rpu_ramask;
  470         u_int8_t        rpu_raflags;
  471         u_int32_t       rpu_vltime;
  472         u_int32_t       rpu_pltime;
  473         u_int32_t       rpu_flags;
  474         struct  in6_addr rpu_prefix;
  475 } __packed;
  476 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK  0x80
  477 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x40
  478 
  479 #if BYTE_ORDER == BIG_ENDIAN
  480 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80000000
  481 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40000000
  482 #elif BYTE_ORDER == LITTLE_ENDIAN
  483 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80
  484 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40
  485 #endif
  486 
  487 struct rr_result {              /* router renumbering result message */
  488         u_int16_t       rrr_flags;
  489         u_int8_t        rrr_ordinal;
  490         u_int8_t        rrr_matchedlen;
  491         u_int32_t       rrr_ifid;
  492         struct  in6_addr rrr_prefix;
  493 } __packed;
  494 #if BYTE_ORDER == BIG_ENDIAN
  495 #define ICMP6_RR_RESULT_FLAGS_OOB               0x0002
  496 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         0x0001
  497 #elif BYTE_ORDER == LITTLE_ENDIAN
  498 #define ICMP6_RR_RESULT_FLAGS_OOB               0x0200
  499 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         0x0100
  500 #endif
  501 
  502 /*
  503  * icmp6 filter structures.
  504  */
  505 
  506 struct icmp6_filter {
  507         u_int32_t icmp6_filt[8];
  508 };
  509 
  510 #ifdef _KERNEL
  511 #define ICMP6_FILTER_SETPASSALL(filterp) \
  512 do {                                                            \
  513         int i; u_char *p;                                       \
  514         p = (u_char *)filterp;                                  \
  515         for (i = 0; i < sizeof(struct icmp6_filter); i++)       \
  516                 p[i] = 0xff;                                    \
  517 } while (/*CONSTCOND*/ 0)
  518 #define ICMP6_FILTER_SETBLOCKALL(filterp) \
  519         bzero(filterp, sizeof(struct icmp6_filter))
  520 #else /* _KERNEL */
  521 #define ICMP6_FILTER_SETPASSALL(filterp) \
  522         memset(filterp, 0xff, sizeof(struct icmp6_filter))
  523 #define ICMP6_FILTER_SETBLOCKALL(filterp) \
  524         memset(filterp, 0x00, sizeof(struct icmp6_filter))
  525 #endif /* _KERNEL */
  526 
  527 #define ICMP6_FILTER_SETPASS(type, filterp) \
  528         (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
  529 #define ICMP6_FILTER_SETBLOCK(type, filterp) \
  530         (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
  531 #define ICMP6_FILTER_WILLPASS(type, filterp) \
  532         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
  533 #define ICMP6_FILTER_WILLBLOCK(type, filterp) \
  534         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
  535 
  536 /*
  537  * Variables related to this implementation
  538  * of the internet control message protocol version 6.
  539  */
  540 struct icmp6errstat {
  541         u_quad_t icp6errs_dst_unreach_noroute;
  542         u_quad_t icp6errs_dst_unreach_admin;
  543         u_quad_t icp6errs_dst_unreach_beyondscope;
  544         u_quad_t icp6errs_dst_unreach_addr;
  545         u_quad_t icp6errs_dst_unreach_noport;
  546         u_quad_t icp6errs_packet_too_big;
  547         u_quad_t icp6errs_time_exceed_transit;
  548         u_quad_t icp6errs_time_exceed_reassembly;
  549         u_quad_t icp6errs_paramprob_header;
  550         u_quad_t icp6errs_paramprob_nextheader;
  551         u_quad_t icp6errs_paramprob_option;
  552         u_quad_t icp6errs_redirect; /* we regard redirect as an error here */
  553         u_quad_t icp6errs_unknown;
  554 };
  555 
  556 struct icmp6stat {
  557 /* statistics related to icmp6 packets generated */
  558         u_quad_t icp6s_error;           /* # of calls to icmp6_error */
  559         u_quad_t icp6s_canterror;       /* no error 'cuz old was icmp */
  560         u_quad_t icp6s_toofreq;         /* no error 'cuz rate limitation */
  561         u_quad_t icp6s_outhist[256];
  562 /* statistics related to input message processed */
  563         u_quad_t icp6s_badcode;         /* icmp6_code out of range */
  564         u_quad_t icp6s_tooshort;        /* packet < sizeof(struct icmp6_hdr) */
  565         u_quad_t icp6s_checksum;        /* bad checksum */
  566         u_quad_t icp6s_badlen;          /* calculated bound mismatch */
  567         /*
  568          * number of responses: this member is inherited from netinet code, but
  569          * for netinet6 code, it is already available in icp6s_outhist[].
  570          */
  571         u_quad_t icp6s_reflect;
  572         u_quad_t icp6s_inhist[256];     
  573         u_quad_t icp6s_nd_toomanyopt;   /* too many ND options */
  574         struct icmp6errstat icp6s_outerrhist;
  575 #define icp6s_odst_unreach_noroute \
  576         icp6s_outerrhist.icp6errs_dst_unreach_noroute
  577 #define icp6s_odst_unreach_admin icp6s_outerrhist.icp6errs_dst_unreach_admin
  578 #define icp6s_odst_unreach_beyondscope \
  579         icp6s_outerrhist.icp6errs_dst_unreach_beyondscope
  580 #define icp6s_odst_unreach_addr icp6s_outerrhist.icp6errs_dst_unreach_addr
  581 #define icp6s_odst_unreach_noport icp6s_outerrhist.icp6errs_dst_unreach_noport
  582 #define icp6s_opacket_too_big icp6s_outerrhist.icp6errs_packet_too_big
  583 #define icp6s_otime_exceed_transit \
  584         icp6s_outerrhist.icp6errs_time_exceed_transit
  585 #define icp6s_otime_exceed_reassembly \
  586         icp6s_outerrhist.icp6errs_time_exceed_reassembly
  587 #define icp6s_oparamprob_header icp6s_outerrhist.icp6errs_paramprob_header
  588 #define icp6s_oparamprob_nextheader \
  589         icp6s_outerrhist.icp6errs_paramprob_nextheader
  590 #define icp6s_oparamprob_option icp6s_outerrhist.icp6errs_paramprob_option
  591 #define icp6s_oredirect icp6s_outerrhist.icp6errs_redirect
  592 #define icp6s_ounknown icp6s_outerrhist.icp6errs_unknown
  593         u_quad_t icp6s_pmtuchg;         /* path MTU changes */
  594         u_quad_t icp6s_nd_badopt;       /* bad ND options */
  595         u_quad_t icp6s_badns;           /* bad neighbor solicitation */
  596         u_quad_t icp6s_badna;           /* bad neighbor advertisement */
  597         u_quad_t icp6s_badrs;           /* bad router advertisement */
  598         u_quad_t icp6s_badra;           /* bad router advertisement */
  599         u_quad_t icp6s_badredirect;     /* bad redirect message */
  600 };
  601 
  602 #ifdef _KERNEL
  603 /*
  604  * In-kernel consumers can use these accessor macros directly to update
  605  * stats.
  606  */
  607 #define ICMP6STAT_ADD(name, val)        V_icmp6stat.name += (val)
  608 #define ICMP6STAT_INC(name)             ICMP6STAT_ADD(name, 1)
  609 
  610 /*
  611  * Kernel module consumers must use this accessor macro.
  612  */
  613 void    kmod_icmp6stat_inc(int statnum);
  614 #define KMOD_ICMP6STAT_INC(name)                                        \
  615         kmod_icmp6stat_inc(offsetof(struct icmp6stat, name) / sizeof(u_quad_t))
  616 #endif
  617 
  618 /*
  619  * Names for ICMP sysctl objects
  620  */
  621 #define ICMPV6CTL_STATS         1
  622 #define ICMPV6CTL_REDIRACCEPT   2       /* accept/process redirects */
  623 #define ICMPV6CTL_REDIRTIMEOUT  3       /* redirect cache time */
  624 #if 0   /*obsoleted*/
  625 #define ICMPV6CTL_ERRRATELIMIT  5       /* ICMPv6 error rate limitation */
  626 #endif
  627 #define ICMPV6CTL_ND6_PRUNE     6
  628 #define ICMPV6CTL_ND6_DELAY     8
  629 #define ICMPV6CTL_ND6_UMAXTRIES 9
  630 #define ICMPV6CTL_ND6_MMAXTRIES         10
  631 #define ICMPV6CTL_ND6_USELOOPBACK       11
  632 /*#define ICMPV6CTL_ND6_PROXYALL        12      obsoleted, do not reuse here */
  633 #define ICMPV6CTL_NODEINFO      13
  634 #define ICMPV6CTL_ERRPPSLIMIT   14      /* ICMPv6 error pps limitation */
  635 #define ICMPV6CTL_ND6_MAXNUDHINT        15
  636 #define ICMPV6CTL_MTUDISC_HIWAT 16
  637 #define ICMPV6CTL_MTUDISC_LOWAT 17
  638 #define ICMPV6CTL_ND6_DEBUG     18
  639 #define ICMPV6CTL_ND6_DRLIST    19
  640 #define ICMPV6CTL_ND6_PRLIST    20
  641 #define ICMPV6CTL_MLD_MAXSRCFILTER      21
  642 #define ICMPV6CTL_MLD_SOMAXSRC  22
  643 #define ICMPV6CTL_MLD_VERSION   23
  644 #define ICMPV6CTL_ND6_MAXQLEN   24
  645 #define ICMPV6CTL_MAXID         25
  646 
  647 #define RTF_PROBEMTU    RTF_PROTO1
  648 
  649 #ifdef _KERNEL
  650 # ifdef __STDC__
  651 struct  rtentry;
  652 struct  rttimer;
  653 struct  in6_multi;
  654 # endif
  655 void    icmp6_paramerror(struct mbuf *, int);
  656 void    icmp6_error(struct mbuf *, int, int, int);
  657 void    icmp6_error2(struct mbuf *, int, int, int, struct ifnet *);
  658 int     icmp6_input(struct mbuf **, int *, int);
  659 void    icmp6_fasttimo(void);
  660 void    icmp6_slowtimo(void);
  661 void    icmp6_reflect(struct mbuf *, size_t);
  662 void    icmp6_prepare(struct mbuf *);
  663 void    icmp6_redirect_input(struct mbuf *, int);
  664 void    icmp6_redirect_output(struct mbuf *, struct rtentry *);
  665 
  666 struct  ip6ctlparam;
  667 void    icmp6_mtudisc_update(struct ip6ctlparam *, int);
  668 
  669 /* XXX: is this the right place for these macros? */
  670 #define icmp6_ifstat_inc(ifp, tag) \
  671 do {                                                            \
  672         if (ifp)                                                \
  673                 ((struct in6_ifextra *)((ifp)->if_afdata[AF_INET6]))->icmp6_ifstat->tag++; \
  674 } while (/*CONSTCOND*/ 0)
  675 
  676 #define icmp6_ifoutstat_inc(ifp, type, code) \
  677 do { \
  678                 icmp6_ifstat_inc(ifp, ifs6_out_msg); \
  679                 if (type < ICMP6_INFOMSG_MASK) \
  680                         icmp6_ifstat_inc(ifp, ifs6_out_error); \
  681                 switch (type) { \
  682                  case ICMP6_DST_UNREACH: \
  683                          icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
  684                          if (code == ICMP6_DST_UNREACH_ADMIN) \
  685                                  icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
  686                          break; \
  687                  case ICMP6_PACKET_TOO_BIG: \
  688                          icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
  689                          break; \
  690                  case ICMP6_TIME_EXCEEDED: \
  691                          icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
  692                          break; \
  693                  case ICMP6_PARAM_PROB: \
  694                          icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
  695                          break; \
  696                  case ICMP6_ECHO_REQUEST: \
  697                          icmp6_ifstat_inc(ifp, ifs6_out_echo); \
  698                          break; \
  699                  case ICMP6_ECHO_REPLY: \
  700                          icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
  701                          break; \
  702                  case MLD_LISTENER_QUERY: \
  703                          icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
  704                          break; \
  705                  case MLD_LISTENER_REPORT: \
  706                          icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
  707                          break; \
  708                  case MLD_LISTENER_DONE: \
  709                          icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
  710                          break; \
  711                  case ND_ROUTER_SOLICIT: \
  712                          icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
  713                          break; \
  714                  case ND_ROUTER_ADVERT: \
  715                          icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
  716                          break; \
  717                  case ND_NEIGHBOR_SOLICIT: \
  718                          icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
  719                          break; \
  720                  case ND_NEIGHBOR_ADVERT: \
  721                          icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
  722                          break; \
  723                  case ND_REDIRECT: \
  724                          icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
  725                          break; \
  726                 } \
  727 } while (/*CONSTCOND*/ 0)
  728 
  729 VNET_DECLARE(int, icmp6_rediraccept);   /* accept/process redirects */
  730 VNET_DECLARE(int, icmp6_redirtimeout);  /* cache time for redirect routes */
  731 
  732 #define V_icmp6_rediraccept     VNET(icmp6_rediraccept)
  733 #define V_icmp6_redirtimeout    VNET(icmp6_redirtimeout)
  734 
  735 #define ICMP6_NODEINFO_FQDNOK           0x1
  736 #define ICMP6_NODEINFO_NODEADDROK       0x2
  737 #define ICMP6_NODEINFO_TMPADDROK        0x4
  738 #define ICMP6_NODEINFO_GLOBALOK         0x8
  739 #endif /* _KERNEL */
  740 
  741 #endif /* not _NETINET_ICMP6_H_ */

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