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

     /*      $NetBSD: in6_var.h,v 1.36 2003/10/15 01:28:28 itojun Exp $      */
     /*      $KAME: in6_var.h,v 1.81 2002/06/08 11:16:51 itojun Exp $        */
     
     /*
      * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the project nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * Copyright (c) 1985, 1986, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)in_var.h    8.1 (Berkeley) 6/10/93
     */
    
    #ifndef _NETINET6_IN6_VAR_H_
    #define _NETINET6_IN6_VAR_H_
    
    /*
     * Interface address, Internet version.  One of these structures
     * is allocated for each interface with an Internet address.
     * The ifaddr structure contains the protocol-independent part
     * of the structure and is assumed to be first.
     */
    
    /*
     * pltime/vltime are just for future reference (required to implements 2
     * hour rule for hosts).  they should never be modified by nd6_timeout or
     * anywhere else.
     *      userland -> kernel: accept pltime/vltime
     *      kernel -> userland: throw up everything
     *      in kernel: modify preferred/expire only
     */
    struct in6_addrlifetime {
            time_t ia6t_expire;     /* valid lifetime expiration time */
            time_t ia6t_preferred;  /* preferred lifetime expiration time */
            u_int32_t ia6t_vltime;  /* valid lifetime */
            u_int32_t ia6t_pltime;  /* prefix lifetime */
    };
    
    struct nd_ifinfo;
    struct in6_ifextra {
            struct in6_ifstat *in6_ifstat;
            struct icmp6_ifstat *icmp6_ifstat;
            struct nd_ifinfo *nd_ifinfo;
    };
    
    struct  in6_ifaddr {
            struct  ifaddr ia_ifa;          /* protocol-independent info */
    #define ia_ifp          ia_ifa.ifa_ifp
    #define ia_flags        ia_ifa.ifa_flags
           struct  sockaddr_in6 ia_addr;   /* interface address */
           struct  sockaddr_in6 ia_net;    /* network number of interface */
           struct  sockaddr_in6 ia_dstaddr; /* space for destination addr */
           struct  sockaddr_in6 ia_prefixmask; /* prefix mask */
           u_int32_t ia_plen;              /* prefix length */
           struct  in6_ifaddr *ia_next;    /* next in6 list of IP6 addresses */
           LIST_HEAD(in6_multihead, in6_multi) ia6_multiaddrs;
                                           /* list of multicast addresses */
           int     ia6_flags;
   
           struct in6_addrlifetime ia6_lifetime;
           time_t  ia6_createtime; /* the creation time of this address, which is
                                    * currently used for temporary addresses only.
                                    */
           time_t  ia6_updatetime;
   
           /* back pointer to the ND prefix (for autoconfigured addresses only) */
           struct nd_prefix *ia6_ndpr;
   
           /* multicast addresses joined from the kernel */
           LIST_HEAD(, in6_multi_mship) ia6_memberships;
   };
   
   /*
    * IPv6 interface statistics, as defined in RFC2465 Ipv6IfStatsEntry (p12).
    */
   struct in6_ifstat {
           u_quad_t ifs6_in_receive;       /* # of total input datagram */
           u_quad_t ifs6_in_hdrerr;        /* # of datagrams with invalid hdr */
           u_quad_t ifs6_in_toobig;        /* # of datagrams exceeded MTU */
           u_quad_t ifs6_in_noroute;       /* # of datagrams with no route */
           u_quad_t ifs6_in_addrerr;       /* # of datagrams with invalid dst */
           u_quad_t ifs6_in_protounknown;  /* # of datagrams with unknown proto */
                                           /* NOTE: increment on final dst if */
           u_quad_t ifs6_in_truncated;     /* # of truncated datagrams */
           u_quad_t ifs6_in_discard;       /* # of discarded datagrams */
                                           /* NOTE: fragment timeout is not here */
           u_quad_t ifs6_in_deliver;       /* # of datagrams delivered to ULP */
                                           /* NOTE: increment on final dst if */
           u_quad_t ifs6_out_forward;      /* # of datagrams forwarded */
                                           /* NOTE: increment on outgoing if */
           u_quad_t ifs6_out_request;      /* # of outgoing datagrams from ULP */
                                           /* NOTE: does not include forwrads */
           u_quad_t ifs6_out_discard;      /* # of discarded datagrams */
           u_quad_t ifs6_out_fragok;       /* # of datagrams fragmented */
           u_quad_t ifs6_out_fragfail;     /* # of datagrams failed on fragment */
           u_quad_t ifs6_out_fragcreat;    /* # of fragment datagrams */
                                           /* NOTE: this is # after fragment */
           u_quad_t ifs6_reass_reqd;       /* # of incoming fragmented packets */
                                           /* NOTE: increment on final dst if */
           u_quad_t ifs6_reass_ok;         /* # of reassembled packets */
                                           /* NOTE: this is # after reass */
                                           /* NOTE: increment on final dst if */
           u_quad_t ifs6_reass_fail;       /* # of reass failures */
                                           /* NOTE: may not be packet count */
                                           /* NOTE: increment on final dst if */
           u_quad_t ifs6_in_mcast;         /* # of inbound multicast datagrams */
           u_quad_t ifs6_out_mcast;        /* # of outbound multicast datagrams */
   };
   
   /*
    * ICMPv6 interface statistics, as defined in RFC2466 Ipv6IfIcmpEntry.
    * XXX: I'm not sure if this file is the right place for this structure...
    */
   struct icmp6_ifstat {
           /*
            * Input statistics
            */
           /* ipv6IfIcmpInMsgs, total # of input messages */
           u_quad_t ifs6_in_msg;
           /* ipv6IfIcmpInErrors, # of input error messages */
           u_quad_t ifs6_in_error;
           /* ipv6IfIcmpInDestUnreachs, # of input dest unreach errors */
           u_quad_t ifs6_in_dstunreach;
           /* ipv6IfIcmpInAdminProhibs, # of input administratively prohibited errs */
           u_quad_t ifs6_in_adminprohib;
           /* ipv6IfIcmpInTimeExcds, # of input time exceeded errors */
           u_quad_t ifs6_in_timeexceed;
           /* ipv6IfIcmpInParmProblems, # of input parameter problem errors */
           u_quad_t ifs6_in_paramprob;
           /* ipv6IfIcmpInPktTooBigs, # of input packet too big errors */
           u_quad_t ifs6_in_pkttoobig;
           /* ipv6IfIcmpInEchos, # of input echo requests */
           u_quad_t ifs6_in_echo;
           /* ipv6IfIcmpInEchoReplies, # of input echo replies */
           u_quad_t ifs6_in_echoreply;
           /* ipv6IfIcmpInRouterSolicits, # of input router solicitations */
           u_quad_t ifs6_in_routersolicit;
           /* ipv6IfIcmpInRouterAdvertisements, # of input router advertisements */
           u_quad_t ifs6_in_routeradvert;
           /* ipv6IfIcmpInNeighborSolicits, # of input neighbor solicitations */
           u_quad_t ifs6_in_neighborsolicit;
           /* ipv6IfIcmpInNeighborAdvertisements, # of input neighbor advertisements */
           u_quad_t ifs6_in_neighboradvert;
           /* ipv6IfIcmpInRedirects, # of input redirects */
           u_quad_t ifs6_in_redirect;
           /* ipv6IfIcmpInGroupMembQueries, # of input MLD queries */
           u_quad_t ifs6_in_mldquery;
           /* ipv6IfIcmpInGroupMembResponses, # of input MLD reports */
           u_quad_t ifs6_in_mldreport;
           /* ipv6IfIcmpInGroupMembReductions, # of input MLD done */
           u_quad_t ifs6_in_mlddone;
   
           /*
            * Output statistics. We should solve unresolved routing problem...
            */
           /* ipv6IfIcmpOutMsgs, total # of output messages */
           u_quad_t ifs6_out_msg;
           /* ipv6IfIcmpOutErrors, # of output error messages */
           u_quad_t ifs6_out_error;
           /* ipv6IfIcmpOutDestUnreachs, # of output dest unreach errors */
           u_quad_t ifs6_out_dstunreach;
           /* ipv6IfIcmpOutAdminProhibs, # of output administratively prohibited errs */
           u_quad_t ifs6_out_adminprohib;
           /* ipv6IfIcmpOutTimeExcds, # of output time exceeded errors */
           u_quad_t ifs6_out_timeexceed;
           /* ipv6IfIcmpOutParmProblems, # of output parameter problem errors */
           u_quad_t ifs6_out_paramprob;
           /* ipv6IfIcmpOutPktTooBigs, # of output packet too big errors */
           u_quad_t ifs6_out_pkttoobig;
           /* ipv6IfIcmpOutEchos, # of output echo requests */
           u_quad_t ifs6_out_echo;
           /* ipv6IfIcmpOutEchoReplies, # of output echo replies */
           u_quad_t ifs6_out_echoreply;
           /* ipv6IfIcmpOutRouterSolicits, # of output router solicitations */
           u_quad_t ifs6_out_routersolicit;
           /* ipv6IfIcmpOutRouterAdvertisements, # of output router advertisements */
           u_quad_t ifs6_out_routeradvert;
           /* ipv6IfIcmpOutNeighborSolicits, # of output neighbor solicitations */
           u_quad_t ifs6_out_neighborsolicit;
           /* ipv6IfIcmpOutNeighborAdvertisements, # of output neighbor advertisements */
           u_quad_t ifs6_out_neighboradvert;
           /* ipv6IfIcmpOutRedirects, # of output redirects */
           u_quad_t ifs6_out_redirect;
           /* ipv6IfIcmpOutGroupMembQueries, # of output MLD queries */
           u_quad_t ifs6_out_mldquery;
           /* ipv6IfIcmpOutGroupMembResponses, # of output MLD reports */
           u_quad_t ifs6_out_mldreport;
           /* ipv6IfIcmpOutGroupMembReductions, # of output MLD done */
           u_quad_t ifs6_out_mlddone;
   };
   
   struct  in6_ifreq {
           char    ifr_name[IFNAMSIZ];
           union {
                   struct  sockaddr_in6 ifru_addr;
                   struct  sockaddr_in6 ifru_dstaddr;
                   short   ifru_flags;
                   int     ifru_flags6;
                   int     ifru_metric;
                   caddr_t ifru_data;
                   struct in6_addrlifetime ifru_lifetime;
                   struct in6_ifstat ifru_stat;
                   struct icmp6_ifstat ifru_icmp6stat;
           } ifr_ifru;
   };
   
   struct  in6_aliasreq {
           char    ifra_name[IFNAMSIZ];
           struct  sockaddr_in6 ifra_addr;
           struct  sockaddr_in6 ifra_dstaddr;
           struct  sockaddr_in6 ifra_prefixmask;
           int     ifra_flags;
           struct in6_addrlifetime ifra_lifetime;
   };
   
   /* prefix type macro */
   #define IN6_PREFIX_ND   1
   #define IN6_PREFIX_RR   2
   
   /*
    * prefix related flags passed between kernel(NDP related part) and
    * user land command(ifconfig) and daemon(rtadvd).
    */
   struct prf_ra {
           u_char onlink : 1;
           u_char autonomous : 1;
           u_char router : 1;
           u_char reserved : 5;
   };
   
   struct in6_prflags {
           struct prf_ra prf_ra;
           u_char prf_reserved1;
           u_short prf_reserved2;
           /* want to put this on 4byte offset */
           struct prf_rr {
                   u_char decrvalid : 1;
                   u_char decrprefd : 1;
                   u_char reserved : 6;
           } prf_rr;
           u_char prf_reserved3;
           u_short prf_reserved4;
   };
   
   struct  in6_prefixreq {
           char    ipr_name[IFNAMSIZ];
           u_char  ipr_origin;
           u_char  ipr_plen;
           u_int32_t ipr_vltime;
           u_int32_t ipr_pltime;
           struct in6_prflags ipr_flags;
           struct  sockaddr_in6 ipr_prefix;
   };
   
   #define PR_ORIG_RA      0
   #define PR_ORIG_RR      1
   #define PR_ORIG_STATIC  2
   #define PR_ORIG_KERNEL  3
   
   #define ipr_raf_onlink          ipr_flags.prf_ra.onlink
   #define ipr_raf_auto            ipr_flags.prf_ra.autonomous
   
   #define ipr_statef_onlink       ipr_flags.prf_state.onlink
   
   #define ipr_rrf_decrvalid       ipr_flags.prf_rr.decrvalid
   #define ipr_rrf_decrprefd       ipr_flags.prf_rr.decrprefd
   
   struct  in6_rrenumreq {
           char    irr_name[IFNAMSIZ];
           u_char  irr_origin;
           u_char  irr_m_len;      /* match len for matchprefix */
           u_char  irr_m_minlen;   /* minlen for matching prefix */
           u_char  irr_m_maxlen;   /* maxlen for matching prefix */
           u_char  irr_u_uselen;   /* uselen for adding prefix */
           u_char  irr_u_keeplen;  /* keeplen from matching prefix */
           struct irr_raflagmask {
                   u_char onlink : 1;
                   u_char autonomous : 1;
                   u_char reserved : 6;
           } irr_raflagmask;
           u_int32_t irr_vltime;
           u_int32_t irr_pltime;
           struct in6_prflags irr_flags;
           struct  sockaddr_in6 irr_matchprefix;
           struct  sockaddr_in6 irr_useprefix;
   };
   
   #define irr_raf_mask_onlink     irr_raflagmask.onlink
   #define irr_raf_mask_auto       irr_raflagmask.autonomous
   #define irr_raf_mask_reserved   irr_raflagmask.reserved
   
   #define irr_raf_onlink          irr_flags.prf_ra.onlink
   #define irr_raf_auto            irr_flags.prf_ra.autonomous
   
   #define irr_statef_onlink       irr_flags.prf_state.onlink
   
   #define irr_rrf                 irr_flags.prf_rr
   #define irr_rrf_decrvalid       irr_flags.prf_rr.decrvalid
   #define irr_rrf_decrprefd       irr_flags.prf_rr.decrprefd
   
   /*
    * Given a pointer to an in6_ifaddr (ifaddr),
    * return a pointer to the addr as a sockaddr_in6
    */
   #define IA6_IN6(ia)     (&((ia)->ia_addr.sin6_addr))
   #define IA6_DSTIN6(ia)  (&((ia)->ia_dstaddr.sin6_addr))
   #define IA6_MASKIN6(ia) (&((ia)->ia_prefixmask.sin6_addr))
   #define IA6_SIN6(ia)    (&((ia)->ia_addr))
   #define IA6_DSTSIN6(ia) (&((ia)->ia_dstaddr))
   #define IFA_IN6(x)      (&((struct sockaddr_in6 *)((x)->ifa_addr))->sin6_addr)
   #define IFA_DSTIN6(x)   (&((struct sockaddr_in6 *)((x)->ifa_dstaddr))->sin6_addr)
   
   #ifdef _KERNEL
   #define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m)      (       \
           (((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \
           (((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \
           (((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \
           (((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 )
   #endif
   
   #define SIOCSIFADDR_IN6          _IOW('i', 12, struct in6_ifreq)
   #define SIOCGIFADDR_IN6         _IOWR('i', 33, struct in6_ifreq)
   
   #ifdef _KERNEL
   /*
    * SIOCSxxx ioctls should be unused (see comments in in6.c), but
    * we do not shift numbers for binary compatibility.
    */
   #define SIOCSIFDSTADDR_IN6       _IOW('i', 14, struct in6_ifreq)
   #define SIOCSIFNETMASK_IN6       _IOW('i', 22, struct in6_ifreq)
   #endif
   
   #define SIOCGIFDSTADDR_IN6      _IOWR('i', 34, struct in6_ifreq)
   #define SIOCGIFNETMASK_IN6      _IOWR('i', 37, struct in6_ifreq)
   
   #define SIOCDIFADDR_IN6          _IOW('i', 25, struct in6_ifreq)
   #define SIOCAIFADDR_IN6          _IOW('i', 26, struct in6_aliasreq)
   
   #define SIOCSIFPHYADDR_IN6       _IOW('i', 70, struct in6_aliasreq)
   #define SIOCGIFPSRCADDR_IN6     _IOWR('i', 71, struct in6_ifreq)
   #define SIOCGIFPDSTADDR_IN6     _IOWR('i', 72, struct in6_ifreq)
   
   #define SIOCGIFAFLAG_IN6        _IOWR('i', 73, struct in6_ifreq)
   
   #define SIOCGDRLST_IN6          _IOWR('i', 74, struct in6_drlist)
   #define SIOCGPRLST_IN6          _IOWR('i', 75, struct in6_oprlist)
   #ifdef _KERNEL
   #define OSIOCGIFINFO_IN6        _IOWR('i', 76, struct in6_ondireq)
   #endif
   #define SIOCGIFINFO_IN6         _IOWR('i', 108, struct in6_ndireq)
   #define SIOCSNDFLUSH_IN6        _IOWR('i', 77, struct in6_ifreq)
   #define SIOCGNBRINFO_IN6        _IOWR('i', 78, struct in6_nbrinfo)
   #define SIOCSPFXFLUSH_IN6       _IOWR('i', 79, struct in6_ifreq)
   #define SIOCSRTRFLUSH_IN6       _IOWR('i', 80, struct in6_ifreq)
   
   #define SIOCGIFALIFETIME_IN6    _IOWR('i', 81, struct in6_ifreq)
   #define SIOCSIFALIFETIME_IN6    _IOWR('i', 82, struct in6_ifreq)
   #define SIOCGIFSTAT_IN6         _IOWR('i', 83, struct in6_ifreq)
   #define SIOCGIFSTAT_ICMP6       _IOWR('i', 84, struct in6_ifreq)
   
   #define SIOCSDEFIFACE_IN6       _IOWR('i', 85, struct in6_ndifreq)
   #define SIOCGDEFIFACE_IN6       _IOWR('i', 86, struct in6_ndifreq)
   
   #define SIOCSIFINFO_FLAGS       _IOWR('i', 87, struct in6_ndireq) /* XXX */
   
   #define SIOCSIFPREFIX_IN6       _IOW('i', 100, struct in6_prefixreq) /* set */
   #define SIOCGIFPREFIX_IN6       _IOWR('i', 101, struct in6_prefixreq) /* get */
   #define SIOCDIFPREFIX_IN6       _IOW('i', 102, struct in6_prefixreq) /* del */
   #define SIOCAIFPREFIX_IN6       _IOW('i', 103, struct in6_rrenumreq) /* add */
   #define SIOCCIFPREFIX_IN6       _IOW('i', 104, \
                                        struct in6_rrenumreq) /* change */
   #define SIOCSGIFPREFIX_IN6      _IOW('i', 105, \
                                        struct in6_rrenumreq) /* set global */
   
   #define SIOCGETSGCNT_IN6        _IOWR('u', 106, \
                                         struct sioc_sg_req6) /* get s,g pkt cnt */
   #define SIOCGETMIFCNT_IN6       _IOWR('u', 107, \
                                         struct sioc_mif_req6) /* get pkt cnt per if */
   
   #define IN6_IFF_ANYCAST         0x01    /* anycast address */
   #define IN6_IFF_TENTATIVE       0x02    /* tentative address */
   #define IN6_IFF_DUPLICATED      0x04    /* DAD detected duplicate */
   #define IN6_IFF_DETACHED        0x08    /* may be detached from the link */
   #define IN6_IFF_DEPRECATED      0x10    /* deprecated address */
   #define IN6_IFF_NODAD           0x20    /* don't perform DAD on this address
                                            * (used only at first SIOC* call)
                                            */
   #define IN6_IFF_AUTOCONF        0x40    /* autoconfigurable address. */
   
   /* do not input/output */
   #define IN6_IFF_NOTREADY (IN6_IFF_TENTATIVE|IN6_IFF_DUPLICATED)
   
   #ifdef _KERNEL
   #define IN6_ARE_SCOPE_CMP(a,b) ((a)-(b))
   #define IN6_ARE_SCOPE_EQUAL(a,b) ((a)==(b))
   #endif
   
   #ifdef _KERNEL
   MALLOC_DECLARE(M_IP6OPT);
   
   extern struct in6_ifaddr *in6_ifaddr;
   
   extern struct icmp6stat icmp6stat;
   #define in6_ifstat_inc(ifp, tag) \
   do {                                                            \
           if (ifp)                                                \
                   ((struct in6_ifextra *)((ifp)->if_afdata[AF_INET6]))->in6_ifstat->tag++; \
   } while (/*CONSTCOND*/ 0)
   
   extern struct ifqueue ip6intrq;         /* IP6 packet input queue */
   extern struct in6_addr zeroin6_addr;
   extern u_char inet6ctlerrmap[];
   extern unsigned long in6_maxmtu;
   
   /*
    * Macro for finding the internet address structure (in6_ifaddr) corresponding
    * to a given interface (ifnet structure).
    */
   
   #define IFP_TO_IA6(ifp, ia)                             \
   /* struct ifnet *ifp; */                                \
   /* struct in6_ifaddr *ia; */                            \
   do {                                                                    \
           struct ifaddr *ifa;                                             \
           for (ifa = (ifp)->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) {   \
                   if (!ifa->ifa_addr)                                     \
                           continue;                                       \
                   if (ifa->ifa_addr->sa_family == AF_INET6)               \
                           break;                                          \
           }                                                               \
           (ia) = (struct in6_ifaddr *)ifa;                                \
   } while (/*CONSTCOND*/ 0)
   
   #endif /* _KERNEL */
   
   /*
    * Multi-cast membership entry.  One for each group/ifp that a PCB
    * belongs to.
    */
   struct in6_multi_mship {
           struct  in6_multi *i6mm_maddr;  /* Multicast address pointer */
           LIST_ENTRY(in6_multi_mship) i6mm_chain;  /* multicast options chain */
   };
   
   struct  in6_multi {
           LIST_ENTRY(in6_multi) in6m_entry; /* list glue */
           struct  in6_addr in6m_addr;     /* IP6 multicast address */
           struct  ifnet *in6m_ifp;        /* back pointer to ifnet */
           struct  in6_ifaddr *in6m_ia;    /* back pointer to in6_ifaddr */
           u_int   in6m_refcount;          /* # membership claims by sockets */
           u_int   in6m_state;             /* state of the membership */
           u_int   in6m_timer;             /* MLD6 listener report timer */
   };
   
   #ifdef _KERNEL
   
   /*
    * Structure used by macros below to remember position when stepping through
    * all of the in6_multi records.
    */
   struct  in6_multistep {
           struct  in6_ifaddr *i_ia;
           struct  in6_multi *i_in6m;
   };
   
   /*
    * Macros for looking up the in6_multi record for a given IP6 multicast
    * address on a given interface. If no matching record is found, "in6m"
    * returns NLL.
    */
   
   #define IN6_LOOKUP_MULTI(addr, ifp, in6m)                       \
   /* struct in6_addr addr; */                                     \
   /* struct ifnet *ifp; */                                        \
   /* struct in6_multi *in6m; */                                   \
   do {                                                            \
           struct in6_ifaddr *ia;                                  \
                                                                   \
           IFP_TO_IA6((ifp), ia);                                  \
           if (ia == NULL)                                         \
                   (in6m) = NULL;                                  \
           else                                                    \
                   for ((in6m) = ia->ia6_multiaddrs.lh_first;      \
                        (in6m) != NULL &&                          \
                        !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &(addr));  \
                        (in6m) = in6m->in6m_entry.le_next)         \
                           continue;                               \
   } while (/*CONSTCOND*/ 0)
   
   /*
    * Macro to step through all of the in6_multi records, one at a time.
    * The current position is remembered in "step", which the caller must
    * provide.  IN6_FIRST_MULTI(), below, must be called to initialize "step"
    * and get the first record.  Both macros return a NULL "in6m" when there
    * are no remaining records.
    */
   #define IN6_NEXT_MULTI(step, in6m)                                      \
   /* struct in6_multistep step; */                                        \
   /* struct in6_multi *in6m; */                                           \
   do {                                                                    \
           if (((in6m) = (step).i_in6m) != NULL)                           \
                   (step).i_in6m = (in6m)->in6m_entry.le_next;             \
           else                                                            \
                   while ((step).i_ia != NULL) {                           \
                           (in6m) = (step).i_ia->ia6_multiaddrs.lh_first;  \
                           (step).i_ia = (step).i_ia->ia_next;             \
                           if ((in6m) != NULL) {                           \
                                   (step).i_in6m = (in6m)->in6m_entry.le_next; \
                                   break;                                  \
                           }                                               \
                   }                                                       \
   } while (/*CONSTCOND*/ 0)
   
   #define IN6_FIRST_MULTI(step, in6m)             \
   /* struct in6_multistep step; */                \
   /* struct in6_multi *in6m */                    \
   do {                                            \
           (step).i_ia = in6_ifaddr;               \
           (step).i_in6m = NULL;                   \
           IN6_NEXT_MULTI((step), (in6m));         \
   } while (/*CONSTCOND*/ 0)
   
   struct  in6_multi *in6_addmulti __P((struct in6_addr *, struct ifnet *,
           int *));
   void    in6_delmulti __P((struct in6_multi *));
   struct in6_multi_mship *in6_joingroup __P((struct ifnet *, struct in6_addr *,
           int *));
   int     in6_leavegroup __P((struct in6_multi_mship *));
   int     in6_ifindex2scopeid __P((int));
   int     in6_mask2len __P((struct in6_addr *, u_char *));
   int     in6_control __P((struct socket *, u_long, caddr_t, struct ifnet *,
           struct proc *));
   int     in6_update_ifa __P((struct ifnet *, struct in6_aliasreq *,
           struct in6_ifaddr *));
   void    in6_purgeaddr __P((struct ifaddr *));
   int     in6if_do_dad __P((struct ifnet *));
   void    in6_purgeif __P((struct ifnet *));
   void    in6_savemkludge __P((struct in6_ifaddr *));
   void    in6_setmaxmtu   __P((void));
   void    *in6_domifattach __P((struct ifnet *));
   void    in6_domifdetach __P((struct ifnet *, void *));
   void    in6_restoremkludge __P((struct in6_ifaddr *, struct ifnet *));
   void    in6_createmkludge __P((struct ifnet *));
   void    in6_purgemkludge __P((struct ifnet *));
   struct in6_ifaddr *in6ifa_ifpforlinklocal __P((struct ifnet *, int));
   struct in6_ifaddr *in6ifa_ifpwithaddr __P((struct ifnet *, struct in6_addr *));
   char    *ip6_sprintf __P((const struct in6_addr *));
   int     in6_addr2scopeid __P((struct ifnet *, struct in6_addr *));
   int     in6_matchlen __P((struct in6_addr *, struct in6_addr *));
   int     in6_are_prefix_equal __P((struct in6_addr *, struct in6_addr *, int));
   void    in6_prefixlen2mask __P((struct in6_addr *, int));
   void    in6_purgeprefix __P((struct ifnet *));
   
   int     in6_is_addr_deprecated __P((struct sockaddr_in6 *));
   struct in6pcb;
   int in6_embedscope __P((struct in6_addr *, const struct sockaddr_in6 *,
           struct in6pcb *, struct ifnet **));
   int in6_recoverscope __P((struct sockaddr_in6 *, const struct in6_addr *,
           struct ifnet *));
   void in6_clearscope __P((struct in6_addr *));
   #endif /* _KERNEL */
   
   #endif /* _NETINET6_IN6_VAR_H_ */

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