The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/in6_var.h

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    1 /*-
    2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. Neither the name of the project nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      $KAME: in6_var.h,v 1.56 2001/03/29 05:34:31 itojun Exp $
   30  */
   31 
   32 /*-
   33  * Copyright (c) 1985, 1986, 1993
   34  *      The Regents of the University of California.  All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  * 4. Neither the name of the University nor the names of its contributors
   45  *    may be used to endorse or promote products derived from this software
   46  *    without specific prior written permission.
   47  *
   48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   58  * SUCH DAMAGE.
   59  *
   60  *      @(#)in_var.h    8.1 (Berkeley) 6/10/93
   61  * $FreeBSD: releng/10.0/sys/netinet6/in6_var.h 253086 2013-07-09 09:59:46Z ae $
   62  */
   63 
   64 #ifndef _NETINET6_IN6_VAR_H_
   65 #define _NETINET6_IN6_VAR_H_
   66 
   67 #include <sys/tree.h>
   68 
   69 #ifdef _KERNEL
   70 #include <sys/fnv_hash.h>
   71 #include <sys/libkern.h>
   72 #endif
   73 
   74 /*
   75  * Interface address, Internet version.  One of these structures
   76  * is allocated for each interface with an Internet address.
   77  * The ifaddr structure contains the protocol-independent part
   78  * of the structure and is assumed to be first.
   79  */
   80 
   81 /*
   82  * pltime/vltime are just for future reference (required to implements 2
   83  * hour rule for hosts).  they should never be modified by nd6_timeout or
   84  * anywhere else.
   85  *      userland -> kernel: accept pltime/vltime
   86  *      kernel -> userland: throw up everything
   87  *      in kernel: modify preferred/expire only
   88  */
   89 struct in6_addrlifetime {
   90         time_t ia6t_expire;     /* valid lifetime expiration time */
   91         time_t ia6t_preferred;  /* preferred lifetime expiration time */
   92         u_int32_t ia6t_vltime;  /* valid lifetime */
   93         u_int32_t ia6t_pltime;  /* prefix lifetime */
   94 };
   95 
   96 struct nd_ifinfo;
   97 struct scope6_id;
   98 struct lltable;
   99 struct mld_ifinfo;
  100 
  101 #ifdef _KERNEL
  102 #include <sys/counter.h>
  103 
  104 struct in6_ifextra {
  105         counter_u64_t *in6_ifstat;
  106         counter_u64_t *icmp6_ifstat;
  107         struct nd_ifinfo *nd_ifinfo;
  108         struct scope6_id *scope6_id;
  109         struct lltable *lltable;
  110         struct mld_ifinfo *mld_ifinfo;
  111 };
  112 #else
  113 
  114 struct in6_ifextra {
  115         void *in6_ifstat;
  116         void *icmp6_ifstat;
  117         struct nd_ifinfo *nd_ifinfo;
  118         struct scope6_id *scope6_id;
  119         struct lltable *lltable;
  120         struct mld_ifinfo *mld_ifinfo;
  121 };
  122 #endif /* !_KERNEL */
  123 
  124 #define LLTABLE6(ifp)   (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->lltable)
  125 
  126 struct  in6_ifaddr {
  127         struct  ifaddr ia_ifa;          /* protocol-independent info */
  128 #define ia_ifp          ia_ifa.ifa_ifp
  129 #define ia_flags        ia_ifa.ifa_flags
  130         struct  sockaddr_in6 ia_addr;   /* interface address */
  131         struct  sockaddr_in6 ia_net;    /* network number of interface */
  132         struct  sockaddr_in6 ia_dstaddr; /* space for destination addr */
  133         struct  sockaddr_in6 ia_prefixmask; /* prefix mask */
  134         u_int32_t ia_plen;              /* prefix length */
  135         TAILQ_ENTRY(in6_ifaddr) ia_link;        /* list of IPv6 addresses */
  136         int     ia6_flags;
  137 
  138         struct in6_addrlifetime ia6_lifetime;
  139         time_t  ia6_createtime; /* the creation time of this address, which is
  140                                  * currently used for temporary addresses only.
  141                                  */
  142         time_t  ia6_updatetime;
  143 
  144         /* back pointer to the ND prefix (for autoconfigured addresses only) */
  145         struct nd_prefix *ia6_ndpr;
  146 
  147         /* multicast addresses joined from the kernel */
  148         LIST_HEAD(, in6_multi_mship) ia6_memberships;
  149         /* entry in bucket of inet6 addresses */
  150         LIST_ENTRY(in6_ifaddr) ia6_hash;
  151 };
  152 
  153 /* List of in6_ifaddr's. */
  154 TAILQ_HEAD(in6_ifaddrhead, in6_ifaddr);
  155 LIST_HEAD(in6_ifaddrlisthead, in6_ifaddr);
  156 
  157 /* control structure to manage address selection policy */
  158 struct in6_addrpolicy {
  159         struct sockaddr_in6 addr; /* prefix address */
  160         struct sockaddr_in6 addrmask; /* prefix mask */
  161         int preced;             /* precedence */
  162         int label;              /* matching label */
  163         u_quad_t use;           /* statistics */
  164 };
  165 
  166 /*
  167  * IPv6 interface statistics, as defined in RFC2465 Ipv6IfStatsEntry (p12).
  168  */
  169 struct in6_ifstat {
  170         uint64_t ifs6_in_receive;       /* # of total input datagram */
  171         uint64_t ifs6_in_hdrerr;        /* # of datagrams with invalid hdr */
  172         uint64_t ifs6_in_toobig;        /* # of datagrams exceeded MTU */
  173         uint64_t ifs6_in_noroute;       /* # of datagrams with no route */
  174         uint64_t ifs6_in_addrerr;       /* # of datagrams with invalid dst */
  175         uint64_t ifs6_in_protounknown;  /* # of datagrams with unknown proto */
  176                                         /* NOTE: increment on final dst if */
  177         uint64_t ifs6_in_truncated;     /* # of truncated datagrams */
  178         uint64_t ifs6_in_discard;       /* # of discarded datagrams */
  179                                         /* NOTE: fragment timeout is not here */
  180         uint64_t ifs6_in_deliver;       /* # of datagrams delivered to ULP */
  181                                         /* NOTE: increment on final dst if */
  182         uint64_t ifs6_out_forward;      /* # of datagrams forwarded */
  183                                         /* NOTE: increment on outgoing if */
  184         uint64_t ifs6_out_request;      /* # of outgoing datagrams from ULP */
  185                                         /* NOTE: does not include forwrads */
  186         uint64_t ifs6_out_discard;      /* # of discarded datagrams */
  187         uint64_t ifs6_out_fragok;       /* # of datagrams fragmented */
  188         uint64_t ifs6_out_fragfail;     /* # of datagrams failed on fragment */
  189         uint64_t ifs6_out_fragcreat;    /* # of fragment datagrams */
  190                                         /* NOTE: this is # after fragment */
  191         uint64_t ifs6_reass_reqd;       /* # of incoming fragmented packets */
  192                                         /* NOTE: increment on final dst if */
  193         uint64_t ifs6_reass_ok;         /* # of reassembled packets */
  194                                         /* NOTE: this is # after reass */
  195                                         /* NOTE: increment on final dst if */
  196         uint64_t ifs6_reass_fail;       /* # of reass failures */
  197                                         /* NOTE: may not be packet count */
  198                                         /* NOTE: increment on final dst if */
  199         uint64_t ifs6_in_mcast;         /* # of inbound multicast datagrams */
  200         uint64_t ifs6_out_mcast;        /* # of outbound multicast datagrams */
  201 };
  202 
  203 /*
  204  * ICMPv6 interface statistics, as defined in RFC2466 Ipv6IfIcmpEntry.
  205  * XXX: I'm not sure if this file is the right place for this structure...
  206  */
  207 struct icmp6_ifstat {
  208         /*
  209          * Input statistics
  210          */
  211         /* ipv6IfIcmpInMsgs, total # of input messages */
  212         uint64_t ifs6_in_msg;
  213         /* ipv6IfIcmpInErrors, # of input error messages */
  214         uint64_t ifs6_in_error;
  215         /* ipv6IfIcmpInDestUnreachs, # of input dest unreach errors */
  216         uint64_t ifs6_in_dstunreach;
  217         /* ipv6IfIcmpInAdminProhibs, # of input administratively prohibited errs */
  218         uint64_t ifs6_in_adminprohib;
  219         /* ipv6IfIcmpInTimeExcds, # of input time exceeded errors */
  220         uint64_t ifs6_in_timeexceed;
  221         /* ipv6IfIcmpInParmProblems, # of input parameter problem errors */
  222         uint64_t ifs6_in_paramprob;
  223         /* ipv6IfIcmpInPktTooBigs, # of input packet too big errors */
  224         uint64_t ifs6_in_pkttoobig;
  225         /* ipv6IfIcmpInEchos, # of input echo requests */
  226         uint64_t ifs6_in_echo;
  227         /* ipv6IfIcmpInEchoReplies, # of input echo replies */
  228         uint64_t ifs6_in_echoreply;
  229         /* ipv6IfIcmpInRouterSolicits, # of input router solicitations */
  230         uint64_t ifs6_in_routersolicit;
  231         /* ipv6IfIcmpInRouterAdvertisements, # of input router advertisements */
  232         uint64_t ifs6_in_routeradvert;
  233         /* ipv6IfIcmpInNeighborSolicits, # of input neighbor solicitations */
  234         uint64_t ifs6_in_neighborsolicit;
  235         /* ipv6IfIcmpInNeighborAdvertisements, # of input neighbor advertisements */
  236         uint64_t ifs6_in_neighboradvert;
  237         /* ipv6IfIcmpInRedirects, # of input redirects */
  238         uint64_t ifs6_in_redirect;
  239         /* ipv6IfIcmpInGroupMembQueries, # of input MLD queries */
  240         uint64_t ifs6_in_mldquery;
  241         /* ipv6IfIcmpInGroupMembResponses, # of input MLD reports */
  242         uint64_t ifs6_in_mldreport;
  243         /* ipv6IfIcmpInGroupMembReductions, # of input MLD done */
  244         uint64_t ifs6_in_mlddone;
  245 
  246         /*
  247          * Output statistics. We should solve unresolved routing problem...
  248          */
  249         /* ipv6IfIcmpOutMsgs, total # of output messages */
  250         uint64_t ifs6_out_msg;
  251         /* ipv6IfIcmpOutErrors, # of output error messages */
  252         uint64_t ifs6_out_error;
  253         /* ipv6IfIcmpOutDestUnreachs, # of output dest unreach errors */
  254         uint64_t ifs6_out_dstunreach;
  255         /* ipv6IfIcmpOutAdminProhibs, # of output administratively prohibited errs */
  256         uint64_t ifs6_out_adminprohib;
  257         /* ipv6IfIcmpOutTimeExcds, # of output time exceeded errors */
  258         uint64_t ifs6_out_timeexceed;
  259         /* ipv6IfIcmpOutParmProblems, # of output parameter problem errors */
  260         uint64_t ifs6_out_paramprob;
  261         /* ipv6IfIcmpOutPktTooBigs, # of output packet too big errors */
  262         uint64_t ifs6_out_pkttoobig;
  263         /* ipv6IfIcmpOutEchos, # of output echo requests */
  264         uint64_t ifs6_out_echo;
  265         /* ipv6IfIcmpOutEchoReplies, # of output echo replies */
  266         uint64_t ifs6_out_echoreply;
  267         /* ipv6IfIcmpOutRouterSolicits, # of output router solicitations */
  268         uint64_t ifs6_out_routersolicit;
  269         /* ipv6IfIcmpOutRouterAdvertisements, # of output router advertisements */
  270         uint64_t ifs6_out_routeradvert;
  271         /* ipv6IfIcmpOutNeighborSolicits, # of output neighbor solicitations */
  272         uint64_t ifs6_out_neighborsolicit;
  273         /* ipv6IfIcmpOutNeighborAdvertisements, # of output neighbor advertisements */
  274         uint64_t ifs6_out_neighboradvert;
  275         /* ipv6IfIcmpOutRedirects, # of output redirects */
  276         uint64_t ifs6_out_redirect;
  277         /* ipv6IfIcmpOutGroupMembQueries, # of output MLD queries */
  278         uint64_t ifs6_out_mldquery;
  279         /* ipv6IfIcmpOutGroupMembResponses, # of output MLD reports */
  280         uint64_t ifs6_out_mldreport;
  281         /* ipv6IfIcmpOutGroupMembReductions, # of output MLD done */
  282         uint64_t ifs6_out_mlddone;
  283 };
  284 
  285 struct  in6_ifreq {
  286         char    ifr_name[IFNAMSIZ];
  287         union {
  288                 struct  sockaddr_in6 ifru_addr;
  289                 struct  sockaddr_in6 ifru_dstaddr;
  290                 int     ifru_flags;
  291                 int     ifru_flags6;
  292                 int     ifru_metric;
  293                 caddr_t ifru_data;
  294                 struct in6_addrlifetime ifru_lifetime;
  295                 struct in6_ifstat ifru_stat;
  296                 struct icmp6_ifstat ifru_icmp6stat;
  297                 u_int32_t ifru_scope_id[16];
  298         } ifr_ifru;
  299 };
  300 
  301 struct  in6_aliasreq {
  302         char    ifra_name[IFNAMSIZ];
  303         struct  sockaddr_in6 ifra_addr;
  304         struct  sockaddr_in6 ifra_dstaddr;
  305         struct  sockaddr_in6 ifra_prefixmask;
  306         int     ifra_flags;
  307         struct in6_addrlifetime ifra_lifetime;
  308         int     ifra_vhid;
  309 };
  310 
  311 /* pre-10.x compat */
  312 struct  oin6_aliasreq {
  313         char    ifra_name[IFNAMSIZ];
  314         struct  sockaddr_in6 ifra_addr;
  315         struct  sockaddr_in6 ifra_dstaddr;
  316         struct  sockaddr_in6 ifra_prefixmask;
  317         int     ifra_flags;
  318         struct in6_addrlifetime ifra_lifetime;
  319 };
  320 
  321 /* prefix type macro */
  322 #define IN6_PREFIX_ND   1
  323 #define IN6_PREFIX_RR   2
  324 
  325 /*
  326  * prefix related flags passed between kernel(NDP related part) and
  327  * user land command(ifconfig) and daemon(rtadvd).
  328  */
  329 struct in6_prflags {
  330         struct prf_ra {
  331                 u_char onlink : 1;
  332                 u_char autonomous : 1;
  333                 u_char reserved : 6;
  334         } prf_ra;
  335         u_char prf_reserved1;
  336         u_short prf_reserved2;
  337         /* want to put this on 4byte offset */
  338         struct prf_rr {
  339                 u_char decrvalid : 1;
  340                 u_char decrprefd : 1;
  341                 u_char reserved : 6;
  342         } prf_rr;
  343         u_char prf_reserved3;
  344         u_short prf_reserved4;
  345 };
  346 
  347 struct  in6_prefixreq {
  348         char    ipr_name[IFNAMSIZ];
  349         u_char  ipr_origin;
  350         u_char  ipr_plen;
  351         u_int32_t ipr_vltime;
  352         u_int32_t ipr_pltime;
  353         struct in6_prflags ipr_flags;
  354         struct  sockaddr_in6 ipr_prefix;
  355 };
  356 
  357 #define PR_ORIG_RA      0
  358 #define PR_ORIG_RR      1
  359 #define PR_ORIG_STATIC  2
  360 #define PR_ORIG_KERNEL  3
  361 
  362 #define ipr_raf_onlink          ipr_flags.prf_ra.onlink
  363 #define ipr_raf_auto            ipr_flags.prf_ra.autonomous
  364 
  365 #define ipr_statef_onlink       ipr_flags.prf_state.onlink
  366 
  367 #define ipr_rrf_decrvalid       ipr_flags.prf_rr.decrvalid
  368 #define ipr_rrf_decrprefd       ipr_flags.prf_rr.decrprefd
  369 
  370 struct  in6_rrenumreq {
  371         char    irr_name[IFNAMSIZ];
  372         u_char  irr_origin;
  373         u_char  irr_m_len;      /* match len for matchprefix */
  374         u_char  irr_m_minlen;   /* minlen for matching prefix */
  375         u_char  irr_m_maxlen;   /* maxlen for matching prefix */
  376         u_char  irr_u_uselen;   /* uselen for adding prefix */
  377         u_char  irr_u_keeplen;  /* keeplen from matching prefix */
  378         struct irr_raflagmask {
  379                 u_char onlink : 1;
  380                 u_char autonomous : 1;
  381                 u_char reserved : 6;
  382         } irr_raflagmask;
  383         u_int32_t irr_vltime;
  384         u_int32_t irr_pltime;
  385         struct in6_prflags irr_flags;
  386         struct  sockaddr_in6 irr_matchprefix;
  387         struct  sockaddr_in6 irr_useprefix;
  388 };
  389 
  390 #define irr_raf_mask_onlink     irr_raflagmask.onlink
  391 #define irr_raf_mask_auto       irr_raflagmask.autonomous
  392 #define irr_raf_mask_reserved   irr_raflagmask.reserved
  393 
  394 #define irr_raf_onlink          irr_flags.prf_ra.onlink
  395 #define irr_raf_auto            irr_flags.prf_ra.autonomous
  396 
  397 #define irr_statef_onlink       irr_flags.prf_state.onlink
  398 
  399 #define irr_rrf                 irr_flags.prf_rr
  400 #define irr_rrf_decrvalid       irr_flags.prf_rr.decrvalid
  401 #define irr_rrf_decrprefd       irr_flags.prf_rr.decrprefd
  402 
  403 /*
  404  * Given a pointer to an in6_ifaddr (ifaddr),
  405  * return a pointer to the addr as a sockaddr_in6
  406  */
  407 #define IA6_IN6(ia)     (&((ia)->ia_addr.sin6_addr))
  408 #define IA6_DSTIN6(ia)  (&((ia)->ia_dstaddr.sin6_addr))
  409 #define IA6_MASKIN6(ia) (&((ia)->ia_prefixmask.sin6_addr))
  410 #define IA6_SIN6(ia)    (&((ia)->ia_addr))
  411 #define IA6_DSTSIN6(ia) (&((ia)->ia_dstaddr))
  412 #define IFA_IN6(x)      (&((struct sockaddr_in6 *)((x)->ifa_addr))->sin6_addr)
  413 #define IFA_DSTIN6(x)   (&((struct sockaddr_in6 *)((x)->ifa_dstaddr))->sin6_addr)
  414 
  415 #define IFPR_IN6(x)     (&((struct sockaddr_in6 *)((x)->ifpr_prefix))->sin6_addr)
  416 
  417 #ifdef _KERNEL
  418 #define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m)      (       \
  419         (((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \
  420         (((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \
  421         (((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \
  422         (((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 )
  423 #endif
  424 
  425 #define SIOCSIFADDR_IN6          _IOW('i', 12, struct in6_ifreq)
  426 #define SIOCGIFADDR_IN6         _IOWR('i', 33, struct in6_ifreq)
  427 
  428 #ifdef _KERNEL
  429 /*
  430  * SIOCSxxx ioctls should be unused (see comments in in6.c), but
  431  * we do not shift numbers for binary compatibility.
  432  */
  433 #define SIOCSIFDSTADDR_IN6       _IOW('i', 14, struct in6_ifreq)
  434 #define SIOCSIFNETMASK_IN6       _IOW('i', 22, struct in6_ifreq)
  435 #endif
  436 
  437 #define SIOCGIFDSTADDR_IN6      _IOWR('i', 34, struct in6_ifreq)
  438 #define SIOCGIFNETMASK_IN6      _IOWR('i', 37, struct in6_ifreq)
  439 
  440 #define SIOCDIFADDR_IN6          _IOW('i', 25, struct in6_ifreq)
  441 #define OSIOCAIFADDR_IN6         _IOW('i', 26, struct oin6_aliasreq)
  442 #define SIOCAIFADDR_IN6          _IOW('i', 27, struct in6_aliasreq)
  443 
  444 #define SIOCSIFPHYADDR_IN6       _IOW('i', 70, struct in6_aliasreq)
  445 #define SIOCGIFPSRCADDR_IN6     _IOWR('i', 71, struct in6_ifreq)
  446 #define SIOCGIFPDSTADDR_IN6     _IOWR('i', 72, struct in6_ifreq)
  447 
  448 #define SIOCGIFAFLAG_IN6        _IOWR('i', 73, struct in6_ifreq)
  449 
  450 #define SIOCGDRLST_IN6          _IOWR('i', 74, struct in6_drlist)
  451 #ifdef _KERNEL
  452 /* XXX: SIOCGPRLST_IN6 is exposed in KAME but in6_oprlist is not. */
  453 #define SIOCGPRLST_IN6          _IOWR('i', 75, struct in6_oprlist)
  454 #endif
  455 #ifdef _KERNEL
  456 #define OSIOCGIFINFO_IN6        _IOWR('i', 76, struct in6_ondireq)
  457 #endif
  458 #define SIOCGIFINFO_IN6         _IOWR('i', 108, struct in6_ndireq)
  459 #define SIOCSIFINFO_IN6         _IOWR('i', 109, struct in6_ndireq)
  460 #define SIOCSNDFLUSH_IN6        _IOWR('i', 77, struct in6_ifreq)
  461 #define SIOCGNBRINFO_IN6        _IOWR('i', 78, struct in6_nbrinfo)
  462 #define SIOCSPFXFLUSH_IN6       _IOWR('i', 79, struct in6_ifreq)
  463 #define SIOCSRTRFLUSH_IN6       _IOWR('i', 80, struct in6_ifreq)
  464 
  465 #define SIOCGIFALIFETIME_IN6    _IOWR('i', 81, struct in6_ifreq)
  466 #define SIOCSIFALIFETIME_IN6    _IOWR('i', 82, struct in6_ifreq)
  467 #define SIOCGIFSTAT_IN6         _IOWR('i', 83, struct in6_ifreq)
  468 #define SIOCGIFSTAT_ICMP6       _IOWR('i', 84, struct in6_ifreq)
  469 
  470 #define SIOCSDEFIFACE_IN6       _IOWR('i', 85, struct in6_ndifreq)
  471 #define SIOCGDEFIFACE_IN6       _IOWR('i', 86, struct in6_ndifreq)
  472 
  473 #define SIOCSIFINFO_FLAGS       _IOWR('i', 87, struct in6_ndireq) /* XXX */
  474 
  475 #define SIOCSSCOPE6             _IOW('i', 88, struct in6_ifreq)
  476 #define SIOCGSCOPE6             _IOWR('i', 89, struct in6_ifreq)
  477 #define SIOCGSCOPE6DEF          _IOWR('i', 90, struct in6_ifreq)
  478 
  479 #define SIOCSIFPREFIX_IN6       _IOW('i', 100, struct in6_prefixreq) /* set */
  480 #define SIOCGIFPREFIX_IN6       _IOWR('i', 101, struct in6_prefixreq) /* get */
  481 #define SIOCDIFPREFIX_IN6       _IOW('i', 102, struct in6_prefixreq) /* del */
  482 #define SIOCAIFPREFIX_IN6       _IOW('i', 103, struct in6_rrenumreq) /* add */
  483 #define SIOCCIFPREFIX_IN6       _IOW('i', 104, \
  484                                      struct in6_rrenumreq) /* change */
  485 #define SIOCSGIFPREFIX_IN6      _IOW('i', 105, \
  486                                      struct in6_rrenumreq) /* set global */
  487 
  488 #define SIOCGETSGCNT_IN6        _IOWR('u', 106, \
  489                                       struct sioc_sg_req6) /* get s,g pkt cnt */
  490 #define SIOCGETMIFCNT_IN6       _IOWR('u', 107, \
  491                                       struct sioc_mif_req6) /* get pkt cnt per if */
  492 
  493 #define SIOCAADDRCTL_POLICY     _IOW('u', 108, struct in6_addrpolicy)
  494 #define SIOCDADDRCTL_POLICY     _IOW('u', 109, struct in6_addrpolicy)
  495 
  496 #define IN6_IFF_ANYCAST         0x01    /* anycast address */
  497 #define IN6_IFF_TENTATIVE       0x02    /* tentative address */
  498 #define IN6_IFF_DUPLICATED      0x04    /* DAD detected duplicate */
  499 #define IN6_IFF_DETACHED        0x08    /* may be detached from the link */
  500 #define IN6_IFF_DEPRECATED      0x10    /* deprecated address */
  501 #define IN6_IFF_NODAD           0x20    /* don't perform DAD on this address
  502                                          * (used only at first SIOC* call)
  503                                          */
  504 #define IN6_IFF_AUTOCONF        0x40    /* autoconfigurable address. */
  505 #define IN6_IFF_TEMPORARY       0x80    /* temporary (anonymous) address. */
  506 #define IN6_IFF_NOPFX           0x8000  /* skip kernel prefix management.
  507                                          * XXX: this should be temporary.
  508                                          */
  509 
  510 /* do not input/output */
  511 #define IN6_IFF_NOTREADY (IN6_IFF_TENTATIVE|IN6_IFF_DUPLICATED)
  512 
  513 #ifdef _KERNEL
  514 #define IN6_ARE_SCOPE_CMP(a,b) ((a)-(b))
  515 #define IN6_ARE_SCOPE_EQUAL(a,b) ((a)==(b))
  516 #endif
  517 
  518 #ifdef _KERNEL
  519 VNET_DECLARE(struct in6_ifaddrhead, in6_ifaddrhead);
  520 VNET_DECLARE(struct in6_ifaddrlisthead *, in6_ifaddrhashtbl);
  521 VNET_DECLARE(u_long, in6_ifaddrhmask);
  522 #define V_in6_ifaddrhead                VNET(in6_ifaddrhead)
  523 #define V_in6_ifaddrhashtbl             VNET(in6_ifaddrhashtbl)
  524 #define V_in6_ifaddrhmask               VNET(in6_ifaddrhmask)
  525 
  526 #define IN6ADDR_NHASH_LOG2              8
  527 #define IN6ADDR_NHASH                   (1 << IN6ADDR_NHASH_LOG2)
  528 #define IN6ADDR_HASHVAL(x)              (in6_addrhash(x))
  529 #define IN6ADDR_HASH(x) \
  530     (&V_in6_ifaddrhashtbl[IN6ADDR_HASHVAL(x) & V_in6_ifaddrhmask])
  531 
  532 static __inline uint32_t
  533 in6_addrhash(struct in6_addr *in6)
  534 {
  535         uint32_t x;
  536 
  537         x = in6->s6_addr32[0] ^ in6->s6_addr32[1] ^ in6->s6_addr32[2] ^
  538             in6->s6_addr32[3];
  539         return (fnv_32_buf(&x, sizeof(x), FNV1_32_INIT));
  540 }
  541 
  542 extern struct rwlock in6_ifaddr_lock;
  543 #define IN6_IFADDR_LOCK_ASSERT( )       rw_assert(&in6_ifaddr_lock, RA_LOCKED)
  544 #define IN6_IFADDR_RLOCK()              rw_rlock(&in6_ifaddr_lock)
  545 #define IN6_IFADDR_RLOCK_ASSERT()       rw_assert(&in6_ifaddr_lock, RA_RLOCKED)
  546 #define IN6_IFADDR_RUNLOCK()            rw_runlock(&in6_ifaddr_lock)
  547 #define IN6_IFADDR_WLOCK()              rw_wlock(&in6_ifaddr_lock)
  548 #define IN6_IFADDR_WLOCK_ASSERT()       rw_assert(&in6_ifaddr_lock, RA_WLOCKED)
  549 #define IN6_IFADDR_WUNLOCK()            rw_wunlock(&in6_ifaddr_lock)
  550 
  551 #define in6_ifstat_inc(ifp, tag) \
  552 do {                                                            \
  553         if (ifp)                                                \
  554                 counter_u64_add(((struct in6_ifextra *)         \
  555                     ((ifp)->if_afdata[AF_INET6]))->in6_ifstat[  \
  556                     offsetof(struct in6_ifstat, tag) / sizeof(uint64_t)], 1);\
  557 } while (/*CONSTCOND*/ 0)
  558 
  559 extern u_char inet6ctlerrmap[];
  560 VNET_DECLARE(unsigned long, in6_maxmtu);
  561 #define V_in6_maxmtu                    VNET(in6_maxmtu)
  562 #endif /* _KERNEL */
  563 
  564 /*
  565  * IPv6 multicast MLD-layer source entry.
  566  */
  567 struct ip6_msource {
  568         RB_ENTRY(ip6_msource)   im6s_link;      /* RB tree links */
  569         struct in6_addr         im6s_addr;
  570         struct im6s_st {
  571                 uint16_t        ex;             /* # of exclusive members */
  572                 uint16_t        in;             /* # of inclusive members */
  573         }                       im6s_st[2];     /* state at t0, t1 */
  574         uint8_t                 im6s_stp;       /* pending query */
  575 };
  576 RB_HEAD(ip6_msource_tree, ip6_msource);
  577 
  578 /*
  579  * IPv6 multicast PCB-layer source entry.
  580  *
  581  * NOTE: overlapping use of struct ip6_msource fields at start.
  582  */
  583 struct in6_msource {
  584         RB_ENTRY(ip6_msource)   im6s_link;      /* Common field */
  585         struct in6_addr         im6s_addr;      /* Common field */
  586         uint8_t                 im6sl_st[2];    /* state before/at commit */
  587 };
  588 
  589 #ifdef _KERNEL
  590 /*
  591  * IPv6 source tree comparison function.
  592  *
  593  * An ordered predicate is necessary; bcmp() is not documented to return
  594  * an indication of order, memcmp() is, and is an ISO C99 requirement.
  595  */
  596 static __inline int
  597 ip6_msource_cmp(const struct ip6_msource *a, const struct ip6_msource *b)
  598 {
  599 
  600         return (memcmp(&a->im6s_addr, &b->im6s_addr, sizeof(struct in6_addr)));
  601 }
  602 RB_PROTOTYPE(ip6_msource_tree, ip6_msource, im6s_link, ip6_msource_cmp);
  603 #endif /* _KERNEL */
  604 
  605 /*
  606  * IPv6 multicast PCB-layer group filter descriptor.
  607  */
  608 struct in6_mfilter {
  609         struct ip6_msource_tree im6f_sources; /* source list for (S,G) */
  610         u_long                  im6f_nsrc;    /* # of source entries */
  611         uint8_t                 im6f_st[2];   /* state before/at commit */
  612 };
  613 
  614 /*
  615  * Legacy KAME IPv6 multicast membership descriptor.
  616  */
  617 struct in6_multi_mship {
  618         struct  in6_multi *i6mm_maddr;
  619         LIST_ENTRY(in6_multi_mship) i6mm_chain;
  620 };
  621 
  622 /*
  623  * IPv6 group descriptor.
  624  *
  625  * For every entry on an ifnet's if_multiaddrs list which represents
  626  * an IP multicast group, there is one of these structures.
  627  *
  628  * If any source filters are present, then a node will exist in the RB-tree
  629  * to permit fast lookup by source whenever an operation takes place.
  630  * This permits pre-order traversal when we issue reports.
  631  * Source filter trees are kept separately from the socket layer to
  632  * greatly simplify locking.
  633  *
  634  * When MLDv2 is active, in6m_timer is the response to group query timer.
  635  * The state-change timer in6m_sctimer is separate; whenever state changes
  636  * for the group the state change record is generated and transmitted,
  637  * and kept if retransmissions are necessary.
  638  *
  639  * FUTURE: in6m_link is now only used when groups are being purged
  640  * on a detaching ifnet. It could be demoted to a SLIST_ENTRY, but
  641  * because it is at the very start of the struct, we can't do this
  642  * w/o breaking the ABI for ifmcstat.
  643  */
  644 struct in6_multi {
  645         LIST_ENTRY(in6_multi) in6m_entry; /* list glue */
  646         struct  in6_addr in6m_addr;     /* IPv6 multicast address */
  647         struct  ifnet *in6m_ifp;        /* back pointer to ifnet */
  648         struct  ifmultiaddr *in6m_ifma; /* back pointer to ifmultiaddr */
  649         u_int   in6m_refcount;          /* reference count */
  650         u_int   in6m_state;             /* state of the membership */
  651         u_int   in6m_timer;             /* MLD6 listener report timer */
  652 
  653         /* New fields for MLDv2 follow. */
  654         struct mld_ifinfo       *in6m_mli;      /* MLD info */
  655         SLIST_ENTRY(in6_multi)   in6m_nrele;    /* to-be-released by MLD */
  656         struct ip6_msource_tree  in6m_srcs;     /* tree of sources */
  657         u_long                   in6m_nsrc;     /* # of tree entries */
  658 
  659         struct ifqueue           in6m_scq;      /* queue of pending
  660                                                  * state-change packets */
  661         struct timeval           in6m_lastgsrtv;        /* last G-S-R query */
  662         uint16_t                 in6m_sctimer;  /* state-change timer */
  663         uint16_t                 in6m_scrv;     /* state-change rexmit count */
  664 
  665         /*
  666          * SSM state counters which track state at T0 (the time the last
  667          * state-change report's RV timer went to zero) and T1
  668          * (time of pending report, i.e. now).
  669          * Used for computing MLDv2 state-change reports. Several refcounts
  670          * are maintained here to optimize for common use-cases.
  671          */
  672         struct in6m_st {
  673                 uint16_t        iss_fmode;      /* MLD filter mode */
  674                 uint16_t        iss_asm;        /* # of ASM listeners */
  675                 uint16_t        iss_ex;         /* # of exclusive members */
  676                 uint16_t        iss_in;         /* # of inclusive members */
  677                 uint16_t        iss_rec;        /* # of recorded sources */
  678         }                       in6m_st[2];     /* state at t0, t1 */
  679 };
  680 
  681 /*
  682  * Helper function to derive the filter mode on a source entry
  683  * from its internal counters. Predicates are:
  684  *  A source is only excluded if all listeners exclude it.
  685  *  A source is only included if no listeners exclude it,
  686  *  and at least one listener includes it.
  687  * May be used by ifmcstat(8).
  688  */
  689 static __inline uint8_t
  690 im6s_get_mode(const struct in6_multi *inm, const struct ip6_msource *ims,
  691     uint8_t t)
  692 {
  693 
  694         t = !!t;
  695         if (inm->in6m_st[t].iss_ex > 0 &&
  696             inm->in6m_st[t].iss_ex == ims->im6s_st[t].ex)
  697                 return (MCAST_EXCLUDE);
  698         else if (ims->im6s_st[t].in > 0 && ims->im6s_st[t].ex == 0)
  699                 return (MCAST_INCLUDE);
  700         return (MCAST_UNDEFINED);
  701 }
  702 
  703 #ifdef _KERNEL
  704 
  705 /*
  706  * Lock macros for IPv6 layer multicast address lists.  IPv6 lock goes
  707  * before link layer multicast locks in the lock order.  In most cases,
  708  * consumers of IN_*_MULTI() macros should acquire the locks before
  709  * calling them; users of the in_{add,del}multi() functions should not.
  710  */
  711 extern struct mtx in6_multi_mtx;
  712 #define IN6_MULTI_LOCK()                mtx_lock(&in6_multi_mtx)
  713 #define IN6_MULTI_UNLOCK()              mtx_unlock(&in6_multi_mtx)
  714 #define IN6_MULTI_LOCK_ASSERT()         mtx_assert(&in6_multi_mtx, MA_OWNED)
  715 #define IN6_MULTI_UNLOCK_ASSERT()       mtx_assert(&in6_multi_mtx, MA_NOTOWNED)
  716 
  717 /*
  718  * Look up an in6_multi record for an IPv6 multicast address
  719  * on the interface ifp.
  720  * If no record found, return NULL.
  721  *
  722  * SMPng: The IN6_MULTI_LOCK and IF_ADDR_LOCK on ifp must be held.
  723  */
  724 static __inline struct in6_multi *
  725 in6m_lookup_locked(struct ifnet *ifp, const struct in6_addr *mcaddr)
  726 {
  727         struct ifmultiaddr *ifma;
  728         struct in6_multi *inm;
  729 
  730         IN6_MULTI_LOCK_ASSERT();
  731         IF_ADDR_LOCK_ASSERT(ifp);
  732 
  733         inm = NULL;
  734         TAILQ_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) {
  735                 if (ifma->ifma_addr->sa_family == AF_INET6) {
  736                         inm = (struct in6_multi *)ifma->ifma_protospec;
  737                         if (IN6_ARE_ADDR_EQUAL(&inm->in6m_addr, mcaddr))
  738                                 break;
  739                         inm = NULL;
  740                 }
  741         }
  742         return (inm);
  743 }
  744 
  745 /*
  746  * Wrapper for in6m_lookup_locked().
  747  *
  748  * SMPng: Assumes that neithr the IN6_MULTI_LOCK() or IF_ADDR_LOCK() are held.
  749  */
  750 static __inline struct in6_multi *
  751 in6m_lookup(struct ifnet *ifp, const struct in6_addr *mcaddr)
  752 {
  753         struct in6_multi *inm;
  754 
  755         IN6_MULTI_LOCK();
  756         IF_ADDR_RLOCK(ifp);
  757         inm = in6m_lookup_locked(ifp, mcaddr);
  758         IF_ADDR_RUNLOCK(ifp);
  759         IN6_MULTI_UNLOCK();
  760 
  761         return (inm);
  762 }
  763 
  764 /* Acquire an in6_multi record. */
  765 static __inline void
  766 in6m_acquire_locked(struct in6_multi *inm)
  767 {
  768 
  769         IN6_MULTI_LOCK_ASSERT();
  770         ++inm->in6m_refcount;
  771 }
  772 
  773 struct ip6_moptions;
  774 struct sockopt;
  775 
  776 /* Multicast KPIs. */
  777 int     im6o_mc_filter(const struct ip6_moptions *, const struct ifnet *,
  778             const struct sockaddr *, const struct sockaddr *);
  779 int     in6_mc_join(struct ifnet *, const struct in6_addr *,
  780             struct in6_mfilter *, struct in6_multi **, int);
  781 int     in6_mc_join_locked(struct ifnet *, const struct in6_addr *,
  782             struct in6_mfilter *, struct in6_multi **, int);
  783 int     in6_mc_leave(struct in6_multi *, struct in6_mfilter *);
  784 int     in6_mc_leave_locked(struct in6_multi *, struct in6_mfilter *);
  785 void    in6m_clear_recorded(struct in6_multi *);
  786 void    in6m_commit(struct in6_multi *);
  787 void    in6m_print(const struct in6_multi *);
  788 int     in6m_record_source(struct in6_multi *, const struct in6_addr *);
  789 void    in6m_release_locked(struct in6_multi *);
  790 void    ip6_freemoptions(struct ip6_moptions *);
  791 int     ip6_getmoptions(struct inpcb *, struct sockopt *);
  792 int     ip6_setmoptions(struct inpcb *, struct sockopt *);
  793 
  794 /* Legacy KAME multicast KPIs. */
  795 struct in6_multi_mship *
  796         in6_joingroup(struct ifnet *, struct in6_addr *, int *, int);
  797 int     in6_leavegroup(struct in6_multi_mship *);
  798 
  799 /* flags to in6_update_ifa */
  800 #define IN6_IFAUPDATE_DADDELAY  0x1 /* first time to configure an address */
  801 
  802 int     in6_mask2len(struct in6_addr *, u_char *);
  803 int     in6_control(struct socket *, u_long, caddr_t, struct ifnet *,
  804         struct thread *);
  805 int     in6_update_ifa(struct ifnet *, struct in6_aliasreq *,
  806         struct in6_ifaddr *, int);
  807 void    in6_purgeaddr(struct ifaddr *);
  808 int     in6if_do_dad(struct ifnet *);
  809 void    in6_purgeif(struct ifnet *);
  810 void    in6_savemkludge(struct in6_ifaddr *);
  811 void    *in6_domifattach(struct ifnet *);
  812 void    in6_domifdetach(struct ifnet *, void *);
  813 void    in6_setmaxmtu(void);
  814 int     in6_if2idlen(struct ifnet *);
  815 struct in6_ifaddr *in6ifa_ifpforlinklocal(struct ifnet *, int);
  816 struct in6_ifaddr *in6ifa_ifpwithaddr(struct ifnet *, struct in6_addr *);
  817 struct in6_ifaddr *in6ifa_llaonifp(struct ifnet *);
  818 char    *ip6_sprintf(char *, const struct in6_addr *);
  819 int     in6_addr2zoneid(struct ifnet *, struct in6_addr *, u_int32_t *);
  820 int     in6_matchlen(struct in6_addr *, struct in6_addr *);
  821 int     in6_are_prefix_equal(struct in6_addr *, struct in6_addr *, int);
  822 void    in6_prefixlen2mask(struct in6_addr *, int);
  823 int     in6_prefix_ioctl(struct socket *, u_long, caddr_t,
  824         struct ifnet *);
  825 int     in6_prefix_add_ifid(int, struct in6_ifaddr *);
  826 void    in6_prefix_remove_ifid(int, struct in6_ifaddr *);
  827 void    in6_purgeprefix(struct ifnet *);
  828 void    in6_ifremloop(struct ifaddr *);
  829 void    in6_ifaddloop(struct ifaddr *);
  830 
  831 int     in6_is_addr_deprecated(struct sockaddr_in6 *);
  832 int     in6_src_ioctl(u_long, caddr_t);
  833 
  834 /*
  835  * Extended API for IPv6 FIB support.
  836  */
  837 void    in6_rtredirect(struct sockaddr *, struct sockaddr *, struct sockaddr *,
  838             int, struct sockaddr *, u_int);
  839 int     in6_rtrequest(int, struct sockaddr *, struct sockaddr *,
  840             struct sockaddr *, int, struct rtentry **, u_int);
  841 void    in6_rtalloc(struct route_in6 *, u_int);
  842 void    in6_rtalloc_ign(struct route_in6 *, u_long, u_int);
  843 struct rtentry *in6_rtalloc1(struct sockaddr *, int, u_long, u_int);
  844 #endif /* _KERNEL */
  845 
  846 #endif /* _NETINET6_IN6_VAR_H_ */

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