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

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    1 /*      $OpenBSD: icmp6.h,v 1.51 2021/01/11 13:28:53 bluhm Exp $        */
    2 /*      $KAME: icmp6.h,v 1.84 2003/04/23 10:26:51 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  * 3. 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 
  101 /* RFC2292 decls */
  102 #define ICMP6_MEMBERSHIP_QUERY          130     /* group membership query */
  103 #define ICMP6_MEMBERSHIP_REPORT         131     /* group membership report */
  104 #define ICMP6_MEMBERSHIP_REDUCTION      132     /* group membership termination */
  105 
  106 #define ND_ROUTER_SOLICIT               133     /* router solicitation */
  107 #define ND_ROUTER_ADVERT                134     /* router advertisement */
  108 #define ND_NEIGHBOR_SOLICIT             135     /* neighbor solicitation */
  109 #define ND_NEIGHBOR_ADVERT              136     /* neighbor advertisement */
  110 #define ND_REDIRECT                     137     /* redirect */
  111 
  112 #define ICMP6_ROUTER_RENUMBERING        138     /* router renumbering */
  113 
  114 #define ICMP6_WRUREQUEST                139     /* who are you request */
  115 #define ICMP6_WRUREPLY                  140     /* who are you reply */
  116 #define ICMP6_FQDN_QUERY                139     /* FQDN query */
  117 #define ICMP6_FQDN_REPLY                140     /* FQDN reply */
  118 #define ICMP6_NI_QUERY                  139     /* node information request */
  119 #define ICMP6_NI_REPLY                  140     /* node information reply */
  120 #define MLDV2_LISTENER_REPORT           143     /* RFC3810 listener report */
  121 
  122 /* The definitions below are experimental. TBA */
  123 #define MLD_MTRACE_RESP                 200     /* mtrace response(to sender) */
  124 #define MLD_MTRACE                      201     /* mtrace messages */
  125 
  126 #define ICMP6_MAXTYPE                   201
  127 
  128 #define ICMP6_DST_UNREACH_NOROUTE       0       /* no route to destination */
  129 #define ICMP6_DST_UNREACH_ADMIN         1       /* administratively prohibited */
  130 #define ICMP6_DST_UNREACH_BEYONDSCOPE   2       /* beyond scope of source address */
  131 #define ICMP6_DST_UNREACH_ADDR          3       /* address unreachable */
  132 #define ICMP6_DST_UNREACH_NOPORT        4       /* port unreachable */
  133 
  134 #define ICMP6_TIME_EXCEED_TRANSIT       0       /* ttl==0 in transit */
  135 #define ICMP6_TIME_EXCEED_REASSEMBLY    1       /* ttl==0 in reass */
  136 
  137 #define ICMP6_PARAMPROB_HEADER          0       /* erroneous header field */
  138 #define ICMP6_PARAMPROB_NEXTHEADER      1       /* unrecognized next header */
  139 #define ICMP6_PARAMPROB_OPTION          2       /* unrecognized option */
  140 
  141 #define ICMP6_INFOMSG_MASK              0x80    /* all informational messages */
  142 
  143 #define ICMP6_NI_SUBJ_IPV6      0       /* Query Subject is an IPv6 address */
  144 #define ICMP6_NI_SUBJ_FQDN      1       /* Query Subject is a Domain name */
  145 #define ICMP6_NI_SUBJ_IPV4      2       /* Query Subject is an IPv4 address */
  146 
  147 #define ICMP6_NI_SUCCESS        0       /* node information successful reply */
  148 #define ICMP6_NI_REFUSED        1       /* node information request is refused */
  149 #define ICMP6_NI_UNKNOWN        2       /* unknown Qtype */
  150 
  151 #define ICMP6_ROUTER_RENUMBERING_COMMAND  0     /* rr command */
  152 #define ICMP6_ROUTER_RENUMBERING_RESULT   1     /* rr result */
  153 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255     /* rr seq num reset */
  154 
  155 /* Used in kernel only */
  156 #define ND_REDIRECT_ONLINK      0       /* redirect to an on-link node */
  157 #define ND_REDIRECT_ROUTER      1       /* redirect to a better router */
  158 
  159 /*
  160  * Multicast Listener Discovery
  161  */
  162 struct mld_hdr {
  163         struct icmp6_hdr        mld_icmp6_hdr;
  164         struct in6_addr         mld_addr; /* multicast address */
  165 } __packed;
  166 
  167 /* shortcut macro definitions */
  168 #define mld_type        mld_icmp6_hdr.icmp6_type
  169 #define mld_code        mld_icmp6_hdr.icmp6_code
  170 #define mld_cksum       mld_icmp6_hdr.icmp6_cksum
  171 #define mld_maxdelay    mld_icmp6_hdr.icmp6_data16[0]
  172 #define mld_reserved    mld_icmp6_hdr.icmp6_data16[1]
  173 
  174 /*
  175  * Neighbor Discovery
  176  */
  177 
  178 struct nd_router_solicit {      /* router solicitation */
  179         struct icmp6_hdr        nd_rs_hdr;
  180         /* could be followed by options */
  181 } __packed;
  182 
  183 #define nd_rs_type      nd_rs_hdr.icmp6_type
  184 #define nd_rs_code      nd_rs_hdr.icmp6_code
  185 #define nd_rs_cksum     nd_rs_hdr.icmp6_cksum
  186 #define nd_rs_reserved  nd_rs_hdr.icmp6_data32[0]
  187 
  188 struct nd_router_advert {       /* router advertisement */
  189         struct icmp6_hdr        nd_ra_hdr;
  190         u_int32_t               nd_ra_reachable;        /* reachable time */
  191         u_int32_t               nd_ra_retransmit;       /* retransmit timer */
  192         /* could be followed by options */
  193 } __packed;
  194 
  195 #define nd_ra_type              nd_ra_hdr.icmp6_type
  196 #define nd_ra_code              nd_ra_hdr.icmp6_code
  197 #define nd_ra_cksum             nd_ra_hdr.icmp6_cksum
  198 #define nd_ra_curhoplimit       nd_ra_hdr.icmp6_data8[0]
  199 #define nd_ra_flags_reserved    nd_ra_hdr.icmp6_data8[1]
  200 #define ND_RA_FLAG_MANAGED      0x80
  201 #define ND_RA_FLAG_OTHER        0x40
  202 
  203 #define ND_RA_FLAG_RTPREF_MASK  0x18    /* 00011000 */
  204 
  205 #define ND_RA_FLAG_RTPREF_HIGH  0x08    /* 00001000 */ 
  206 #define ND_RA_FLAG_RTPREF_MEDIUM        0x00    /* 00000000 */
  207 #define ND_RA_FLAG_RTPREF_LOW   0x18    /* 00011000 */
  208 #define ND_RA_FLAG_RTPREF_RSV   0x10    /* 00010000 */
  209 
  210 #define nd_ra_router_lifetime   nd_ra_hdr.icmp6_data16[1]
  211 
  212 struct nd_neighbor_solicit {    /* neighbor solicitation */
  213         struct icmp6_hdr        nd_ns_hdr;
  214         struct in6_addr         nd_ns_target;   /*target address */
  215         /* could be followed by options */
  216 } __packed;
  217 
  218 #define nd_ns_type              nd_ns_hdr.icmp6_type
  219 #define nd_ns_code              nd_ns_hdr.icmp6_code
  220 #define nd_ns_cksum             nd_ns_hdr.icmp6_cksum
  221 #define nd_ns_reserved          nd_ns_hdr.icmp6_data32[0]
  222 
  223 struct nd_neighbor_advert {     /* neighbor advertisement */
  224         struct icmp6_hdr        nd_na_hdr;
  225         struct in6_addr         nd_na_target;   /* target address */
  226         /* could be followed by options */
  227 } __packed;
  228 
  229 #define nd_na_type              nd_na_hdr.icmp6_type
  230 #define nd_na_code              nd_na_hdr.icmp6_code
  231 #define nd_na_cksum             nd_na_hdr.icmp6_cksum
  232 #define nd_na_flags_reserved    nd_na_hdr.icmp6_data32[0]
  233 #define ND_NA_FLAG_ROUTER               htonl(0x80000000)
  234 #define ND_NA_FLAG_SOLICITED            htonl(0x40000000)
  235 #define ND_NA_FLAG_OVERRIDE             htonl(0x20000000)
  236 
  237 struct nd_redirect {            /* redirect */
  238         struct icmp6_hdr        nd_rd_hdr;
  239         struct in6_addr         nd_rd_target;   /* target address */
  240         struct in6_addr         nd_rd_dst;      /* destination address */
  241         /* could be followed by options */
  242 } __packed;
  243 
  244 #define nd_rd_type              nd_rd_hdr.icmp6_type
  245 #define nd_rd_code              nd_rd_hdr.icmp6_code
  246 #define nd_rd_cksum             nd_rd_hdr.icmp6_cksum
  247 #define nd_rd_reserved          nd_rd_hdr.icmp6_data32[0]
  248 
  249 struct nd_opt_hdr {             /* Neighbor discovery option header */
  250         u_int8_t        nd_opt_type;
  251         u_int8_t        nd_opt_len;
  252         /* followed by option specific data*/
  253 } __packed;
  254 
  255 #define ND_OPT_SOURCE_LINKADDR          1
  256 #define ND_OPT_TARGET_LINKADDR          2
  257 #define ND_OPT_PREFIX_INFORMATION       3
  258 #define ND_OPT_REDIRECTED_HEADER        4
  259 #define ND_OPT_MTU                      5
  260 #define ND_OPT_ROUTE_INFO               24
  261 #define ND_OPT_RDNSS                    25
  262 #define ND_OPT_DNSSL                    31
  263 
  264 struct nd_opt_prefix_info {     /* prefix information */
  265         u_int8_t        nd_opt_pi_type;
  266         u_int8_t        nd_opt_pi_len;
  267         u_int8_t        nd_opt_pi_prefix_len;
  268         u_int8_t        nd_opt_pi_flags_reserved;
  269         u_int32_t       nd_opt_pi_valid_time;
  270         u_int32_t       nd_opt_pi_preferred_time;
  271         u_int32_t       nd_opt_pi_reserved2;
  272         struct in6_addr nd_opt_pi_prefix;
  273 } __packed;
  274 
  275 #define ND_OPT_PI_FLAG_ONLINK           0x80
  276 #define ND_OPT_PI_FLAG_AUTO             0x40
  277 
  278 struct nd_opt_rd_hdr {          /* redirected header */
  279         u_int8_t        nd_opt_rh_type;
  280         u_int8_t        nd_opt_rh_len;
  281         u_int16_t       nd_opt_rh_reserved1;
  282         u_int32_t       nd_opt_rh_reserved2;
  283         /* followed by IP header and data */
  284 } __packed;
  285 
  286 struct nd_opt_mtu {             /* MTU option */
  287         u_int8_t        nd_opt_mtu_type;
  288         u_int8_t        nd_opt_mtu_len;
  289         u_int16_t       nd_opt_mtu_reserved;
  290         u_int32_t       nd_opt_mtu_mtu;
  291 } __packed;
  292 
  293 struct nd_opt_route_info {      /* route info */
  294         u_int8_t        nd_opt_rti_type;
  295         u_int8_t        nd_opt_rti_len;
  296         u_int8_t        nd_opt_rti_prefixlen;
  297         u_int8_t        nd_opt_rti_flags;
  298         u_int32_t       nd_opt_rti_lifetime;
  299 } __packed;
  300 
  301 struct nd_opt_rdnss {           /* RDNSS option */
  302         u_int8_t        nd_opt_rdnss_type;
  303         u_int8_t        nd_opt_rdnss_len;
  304         u_int16_t       nd_opt_rdnss_reserved;
  305         u_int32_t       nd_opt_rdnss_lifetime;
  306         /* followed by list of recursive DNS servers */
  307 } __packed;
  308 
  309 struct nd_opt_dnssl {           /* DNSSL option */
  310         u_int8_t        nd_opt_dnssl_type;
  311         u_int8_t        nd_opt_dnssl_len;
  312         u_int16_t       nd_opt_dnssl_reserved;
  313         u_int32_t       nd_opt_dnssl_lifetime;
  314         /* followed by list of DNS search domains */
  315 } __packed;
  316 
  317 /*
  318  * icmp6 namelookup
  319  */
  320 struct icmp6_namelookup {
  321         struct icmp6_hdr        icmp6_nl_hdr;
  322         u_int8_t        icmp6_nl_nonce[8];
  323         int32_t         icmp6_nl_ttl;
  324 #if 0
  325         u_int8_t        icmp6_nl_len;
  326         u_int8_t        icmp6_nl_name[3];
  327 #endif
  328         /* could be followed by options */
  329 } __packed;
  330 
  331 /*
  332  * icmp6 node information
  333  */
  334 struct icmp6_nodeinfo {
  335         struct icmp6_hdr icmp6_ni_hdr;
  336         u_int8_t icmp6_ni_nonce[8];
  337         /* could be followed by reply data */
  338 } __packed;
  339 
  340 #define ni_type         icmp6_ni_hdr.icmp6_type
  341 #define ni_code         icmp6_ni_hdr.icmp6_code
  342 #define ni_cksum        icmp6_ni_hdr.icmp6_cksum
  343 #define ni_qtype        icmp6_ni_hdr.icmp6_data16[0]
  344 #define ni_flags        icmp6_ni_hdr.icmp6_data16[1]
  345 
  346 #define NI_QTYPE_NOOP           0 /* NOOP  */
  347 #define NI_QTYPE_SUPTYPES       1 /* Supported Qtypes */
  348 #define NI_QTYPE_FQDN           2 /* FQDN (draft 04) */
  349 #define NI_QTYPE_DNSNAME        2 /* DNS Name */
  350 #define NI_QTYPE_NODEADDR       3 /* Node Addresses */
  351 #define NI_QTYPE_IPV4ADDR       4 /* IPv4 Addresses */
  352 
  353 #define NI_SUPTYPE_FLAG_COMPRESS        htons(0x0001)
  354 #define NI_FQDN_FLAG_VALIDTTL           htons(0x0001)
  355 
  356 #define NI_NODEADDR_FLAG_TRUNCATE       htons(0x0001)
  357 #define NI_NODEADDR_FLAG_ALL            htons(0x0002)
  358 #define NI_NODEADDR_FLAG_COMPAT         htons(0x0004)
  359 #define NI_NODEADDR_FLAG_LINKLOCAL      htons(0x0008)
  360 #define NI_NODEADDR_FLAG_SITELOCAL      htons(0x0010)
  361 #define NI_NODEADDR_FLAG_GLOBAL         htons(0x0020)
  362 #define NI_NODEADDR_FLAG_ANYCAST        htons(0x0040)   /* not in spec */
  363 
  364 struct ni_reply_fqdn {
  365         u_int32_t ni_fqdn_ttl;  /* TTL */
  366         u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
  367         u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
  368 } __packed;
  369 
  370 /*
  371  * Router Renumbering. as router-renum-08.txt
  372  */
  373 struct icmp6_router_renum {     /* router renumbering header */
  374         struct icmp6_hdr        rr_hdr;
  375         u_int8_t        rr_segnum;
  376         u_int8_t        rr_flags;
  377         u_int16_t       rr_maxdelay;
  378         u_int32_t       rr_reserved;
  379 } __packed;
  380 
  381 #define ICMP6_RR_FLAGS_TEST             0x80
  382 #define ICMP6_RR_FLAGS_REQRESULT        0x40
  383 #define ICMP6_RR_FLAGS_FORCEAPPLY       0x20
  384 #define ICMP6_RR_FLAGS_SPECSITE         0x10
  385 #define ICMP6_RR_FLAGS_PREVDONE         0x08
  386 
  387 #define rr_type         rr_hdr.icmp6_type
  388 #define rr_code         rr_hdr.icmp6_code
  389 #define rr_cksum        rr_hdr.icmp6_cksum
  390 #define rr_seqnum       rr_hdr.icmp6_data32[0]
  391 
  392 struct rr_pco_match {           /* match prefix part */
  393         u_int8_t        rpm_code;
  394         u_int8_t        rpm_len;
  395         u_int8_t        rpm_ordinal;
  396         u_int8_t        rpm_matchlen;
  397         u_int8_t        rpm_minlen;
  398         u_int8_t        rpm_maxlen;
  399         u_int16_t       rpm_reserved;
  400         struct  in6_addr        rpm_prefix;
  401 } __packed;
  402 
  403 #define RPM_PCO_ADD             1
  404 #define RPM_PCO_CHANGE          2
  405 #define RPM_PCO_SETGLOBAL       3
  406 #define RPM_PCO_MAX             4
  407 
  408 struct rr_pco_use {             /* use prefix part */
  409         u_int8_t        rpu_uselen;
  410         u_int8_t        rpu_keeplen;
  411         u_int8_t        rpu_ramask;
  412         u_int8_t        rpu_raflags;
  413         u_int32_t       rpu_vltime;
  414         u_int32_t       rpu_pltime;
  415         u_int32_t       rpu_flags;
  416         struct  in6_addr rpu_prefix;
  417 } __packed;
  418 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK  0x80
  419 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x40
  420 
  421 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     htonl(0x80000000)
  422 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     htonl(0x40000000)
  423 
  424 struct rr_result {              /* router renumbering result message */
  425         u_int16_t       rrr_flags;
  426         u_int8_t        rrr_ordinal;
  427         u_int8_t        rrr_matchedlen;
  428         u_int32_t       rrr_ifid;
  429         struct  in6_addr rrr_prefix;
  430 } __packed;
  431 #define ICMP6_RR_RESULT_FLAGS_OOB               htons(0x0002)
  432 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN         htons(0x0001)
  433 
  434 /*
  435  * icmp6 filter structures.
  436  */
  437 
  438 struct icmp6_filter {
  439         u_int32_t icmp6_filt[8];
  440 };
  441 
  442 #define ICMP6_FILTER_SETPASSALL(filterp) \
  443         memset(filterp, 0xff, sizeof(struct icmp6_filter))
  444 #define ICMP6_FILTER_SETBLOCKALL(filterp) \
  445         memset(filterp, 0x00, sizeof(struct icmp6_filter))
  446 #define ICMP6_FILTER_SETPASS(type, filterp) \
  447         (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
  448 #define ICMP6_FILTER_SETBLOCK(type, filterp) \
  449         (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
  450 #define ICMP6_FILTER_WILLPASS(type, filterp) \
  451         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
  452 #define ICMP6_FILTER_WILLBLOCK(type, filterp) \
  453         ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
  454 
  455 /*
  456  * Variables related to this implementation
  457  * of the internet control message protocol version 6.
  458  */
  459 struct icmp6stat {
  460 /* statistics related to icmp6 packets generated */
  461         u_int64_t icp6s_error;          /* # of calls to icmp6_error */
  462         u_int64_t icp6s_canterror;      /* no error because old was icmp */
  463         u_int64_t icp6s_toofreq;        /* no error because rate limitation */
  464         u_int64_t icp6s_outhist[256];
  465 /* statistics related to input message processed */
  466         u_int64_t icp6s_badcode;        /* icmp6_code out of range */
  467         u_int64_t icp6s_tooshort;       /* packet < sizeof(struct icmp6_hdr) */
  468         u_int64_t icp6s_checksum;       /* bad checksum */
  469         u_int64_t icp6s_badlen;         /* calculated bound mismatch */
  470         /*
  471          * number of responses: this member is inherited from netinet code, but
  472          * for netinet6 code, it is already available in icp6s_outhist[].
  473          */
  474         u_int64_t icp6s_reflect;
  475         u_int64_t icp6s_inhist[256];
  476         u_int64_t icp6s_nd_toomanyopt;  /* too many ND options */
  477         u_int64_t icp6s_odst_unreach_noroute;
  478         u_int64_t icp6s_odst_unreach_admin;
  479         u_int64_t icp6s_odst_unreach_beyondscope;
  480         u_int64_t icp6s_odst_unreach_addr;
  481         u_int64_t icp6s_odst_unreach_noport;
  482         u_int64_t icp6s_opacket_too_big;
  483         u_int64_t icp6s_otime_exceed_transit;
  484         u_int64_t icp6s_otime_exceed_reassembly;
  485         u_int64_t icp6s_oparamprob_header;
  486         u_int64_t icp6s_oparamprob_nextheader;
  487         u_int64_t icp6s_oparamprob_option;
  488         u_int64_t icp6s_oredirect;      /* we regard redirect as an error here */
  489         u_int64_t icp6s_ounknown;
  490         u_int64_t icp6s_pmtuchg;        /* path MTU changes */
  491         u_int64_t icp6s_nd_badopt;      /* bad ND options */
  492         u_int64_t icp6s_badns;          /* bad neighbor solicitation */
  493         u_int64_t icp6s_badna;          /* bad neighbor advertisement */
  494         u_int64_t icp6s_badrs;          /* bad router advertisement */
  495         u_int64_t icp6s_badra;          /* bad router advertisement */
  496         u_int64_t icp6s_badredirect;    /* bad redirect message */
  497 };
  498 
  499 /*
  500  * Names for ICMP sysctl objects
  501  */
  502 #define ICMPV6CTL_STATS         1
  503 #define ICMPV6CTL_REDIRACCEPT   2       /* accept/process redirects */
  504 #define ICMPV6CTL_REDIRTIMEOUT  3       /* redirect cache time */
  505 #define ICMPV6CTL_ND6_DELAY     8
  506 #define ICMPV6CTL_ND6_UMAXTRIES 9
  507 #define ICMPV6CTL_ND6_MMAXTRIES         10
  508 #define ICMPV6CTL_NODEINFO      13
  509 #define ICMPV6CTL_ERRPPSLIMIT   14      /* ICMPv6 error pps limitation */
  510 #define ICMPV6CTL_ND6_MAXNUDHINT        15
  511 #define ICMPV6CTL_MTUDISC_HIWAT 16
  512 #define ICMPV6CTL_MTUDISC_LOWAT 17
  513 #define ICMPV6CTL_ND6_DEBUG     18
  514 #define ICMPV6CTL_MAXID         19
  515 
  516 #define ICMPV6CTL_NAMES { \
  517         { 0, 0 }, \
  518         { 0, 0 }, \
  519         { 0, 0 }, \
  520         { "redirtimeout", CTLTYPE_INT }, \
  521         { 0, 0 }, \
  522         { 0, 0 }, \
  523         { 0, 0 }, \
  524         { 0, 0 }, \
  525         { "nd6_delay", CTLTYPE_INT }, \
  526         { "nd6_umaxtries", CTLTYPE_INT }, \
  527         { "nd6_mmaxtries", CTLTYPE_INT }, \
  528         { 0, 0 }, \
  529         { 0, 0 }, \
  530         { 0, 0 }, \
  531         { "errppslimit", CTLTYPE_INT }, \
  532         { "nd6_maxnudhint", CTLTYPE_INT }, \
  533         { "mtudisc_hiwat", CTLTYPE_INT }, \
  534         { "mtudisc_lowat", CTLTYPE_INT }, \
  535         { "nd6_debug", CTLTYPE_INT }, \
  536 }
  537 
  538 #define RTF_PROBEMTU    RTF_PROTO1
  539 
  540 #ifdef _KERNEL
  541 
  542 #include <sys/percpu.h>
  543 
  544 enum icmp6stat_counters {
  545         icp6s_error,
  546         icp6s_canterror,
  547         icp6s_toofreq,
  548         icp6s_outhist,
  549         icp6s_badcode = icp6s_outhist + 256,
  550         icp6s_tooshort,
  551         icp6s_checksum,
  552         icp6s_badlen,
  553         icp6s_reflect,
  554         icp6s_inhist,
  555         icp6s_nd_toomanyopt = icp6s_inhist + 256,
  556         icp6s_odst_unreach_noroute,
  557         icp6s_odst_unreach_admin,
  558         icp6s_odst_unreach_beyondscope,
  559         icp6s_odst_unreach_addr,
  560         icp6s_odst_unreach_noport,
  561         icp6s_opacket_too_big,
  562         icp6s_otime_exceed_transit,
  563         icp6s_otime_exceed_reassembly,
  564         icp6s_oparamprob_header,
  565         icp6s_oparamprob_nextheader,
  566         icp6s_oparamprob_option,
  567         icp6s_oredirect,
  568         icp6s_ounknown,
  569         icp6s_pmtuchg,
  570         icp6s_nd_badopt,
  571         icp6s_badns,
  572         icp6s_badna,
  573         icp6s_badrs,
  574         icp6s_badra,
  575         icp6s_badredirect,
  576         icp6s_ncounters,
  577 };
  578 
  579 extern struct cpumem *icmp6counters;
  580 
  581 static inline void
  582 icmp6stat_inc(enum icmp6stat_counters c)
  583 {
  584         counters_inc(icmp6counters, c);
  585 }
  586 
  587 struct  rtentry;
  588 struct  rttimer;
  589 struct  in6_multi;
  590 
  591 void             icmp6_init(void);
  592 void             icmp6_paramerror(struct mbuf *, int);
  593 struct mbuf     *icmp6_do_error(struct mbuf *, int, int, int);
  594 void             icmp6_error(struct mbuf *, int, int, int);
  595 int              icmp6_input(struct mbuf **, int *, int, int);
  596 void             icmp6_fasttimo(void);
  597 int              icmp6_reflect(struct mbuf **, size_t, struct sockaddr *);
  598 void             icmp6_prepare(struct mbuf *);
  599 void             icmp6_redirect_input(struct mbuf *, int);
  600 void             icmp6_redirect_output(struct mbuf *, struct rtentry *);
  601 int              icmp6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
  602 struct rtentry  *icmp6_mtudisc_clone(struct sockaddr_in6 *, u_int, int);
  603 
  604 struct  ip6ctlparam;
  605 void    icmp6_mtudisc_update(struct ip6ctlparam *, int);
  606 void    icmp6_mtudisc_callback_register(void (*)(struct sockaddr_in6 *, u_int));
  607 
  608 extern int      icmp6_redirtimeout;     /* cache time for redirect routes */
  609 
  610 #endif /* _KERNEL */
  611 #endif /* _NETINET_ICMP6_H_ */

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