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/11.0/sys/netinet6/in6_var.h 301875 2016-06-13 22:31:16Z pfg $
   62  */
   63 
   64 #ifndef _NETINET6_IN6_VAR_H_
   65 #define _NETINET6_IN6_VAR_H_
   66 
   67 #include <sys/tree.h>
   68 #include <sys/counter.h>
   69 
   70 #ifdef _KERNEL
   71 #include <sys/fnv_hash.h>
   72 #include <sys/libkern.h>
   73 #endif
   74 
   75 /*
   76  * Interface address, Internet version.  One of these structures
   77  * is allocated for each interface with an Internet address.
   78  * The ifaddr structure contains the protocol-independent part
   79  * of the structure and is assumed to be first.
   80  */
   81 
   82 /*
   83  * pltime/vltime are just for future reference (required to implements 2
   84  * hour rule for hosts).  they should never be modified by nd6_timeout or
   85  * anywhere else.
   86  *      userland -> kernel: accept pltime/vltime
   87  *      kernel -> userland: throw up everything
   88  *      in kernel: modify preferred/expire only
   89  */
   90 struct in6_addrlifetime {
   91         time_t ia6t_expire;     /* valid lifetime expiration time */
   92         time_t ia6t_preferred;  /* preferred lifetime expiration time */
   93         u_int32_t ia6t_vltime;  /* valid lifetime */
   94         u_int32_t ia6t_pltime;  /* prefix lifetime */
   95 };
   96 
   97 struct nd_ifinfo;
   98 struct scope6_id;
   99 struct lltable;
  100 struct mld_ifsoftc;
  101 
  102 struct in6_ifextra {
  103         counter_u64_t *in6_ifstat;
  104         counter_u64_t *icmp6_ifstat;
  105         struct nd_ifinfo *nd_ifinfo;
  106         struct scope6_id *scope6_id;
  107         struct lltable *lltable;
  108         struct mld_ifsoftc *mld_ifinfo;
  109 };
  110 
  111 #define LLTABLE6(ifp)   (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->lltable)
  112 
  113 #ifdef _KERNEL
  114 struct  in6_ifaddr {
  115         struct  ifaddr ia_ifa;          /* protocol-independent info */
  116 #define ia_ifp          ia_ifa.ifa_ifp
  117 #define ia_flags        ia_ifa.ifa_flags
  118         struct  sockaddr_in6 ia_addr;   /* interface address */
  119         struct  sockaddr_in6 ia_net;    /* network number of interface */
  120         struct  sockaddr_in6 ia_dstaddr; /* space for destination addr */
  121         struct  sockaddr_in6 ia_prefixmask; /* prefix mask */
  122         u_int32_t ia_plen;              /* prefix length */
  123         TAILQ_ENTRY(in6_ifaddr) ia_link;        /* list of IPv6 addresses */
  124         int     ia6_flags;
  125 
  126         struct in6_addrlifetime ia6_lifetime;
  127         time_t  ia6_createtime; /* the creation time of this address, which is
  128                                  * currently used for temporary addresses only.
  129                                  */
  130         time_t  ia6_updatetime;
  131 
  132         /* back pointer to the ND prefix (for autoconfigured addresses only) */
  133         struct nd_prefix *ia6_ndpr;
  134 
  135         /* multicast addresses joined from the kernel */
  136         LIST_HEAD(, in6_multi_mship) ia6_memberships;
  137         /* entry in bucket of inet6 addresses */
  138         LIST_ENTRY(in6_ifaddr) ia6_hash;
  139 };
  140 
  141 /* List of in6_ifaddr's. */
  142 TAILQ_HEAD(in6_ifaddrhead, in6_ifaddr);
  143 LIST_HEAD(in6_ifaddrlisthead, in6_ifaddr);
  144 #endif  /* _KERNEL */
  145 
  146 /* control structure to manage address selection policy */
  147 struct in6_addrpolicy {
  148         struct sockaddr_in6 addr; /* prefix address */
  149         struct sockaddr_in6 addrmask; /* prefix mask */
  150         int preced;             /* precedence */
  151         int label;              /* matching label */
  152         u_quad_t use;           /* statistics */
  153 };
  154 
  155 /*
  156  * IPv6 interface statistics, as defined in RFC2465 Ipv6IfStatsEntry (p12).
  157  */
  158 struct in6_ifstat {
  159         uint64_t ifs6_in_receive;       /* # of total input datagram */
  160         uint64_t ifs6_in_hdrerr;        /* # of datagrams with invalid hdr */
  161         uint64_t ifs6_in_toobig;        /* # of datagrams exceeded MTU */
  162         uint64_t ifs6_in_noroute;       /* # of datagrams with no route */
  163         uint64_t ifs6_in_addrerr;       /* # of datagrams with invalid dst */
  164         uint64_t ifs6_in_protounknown;  /* # of datagrams with unknown proto */
  165                                         /* NOTE: increment on final dst if */
  166         uint64_t ifs6_in_truncated;     /* # of truncated datagrams */
  167         uint64_t ifs6_in_discard;       /* # of discarded datagrams */
  168                                         /* NOTE: fragment timeout is not here */
  169         uint64_t ifs6_in_deliver;       /* # of datagrams delivered to ULP */
  170                                         /* NOTE: increment on final dst if */
  171         uint64_t ifs6_out_forward;      /* # of datagrams forwarded */
  172                                         /* NOTE: increment on outgoing if */
  173         uint64_t ifs6_out_request;      /* # of outgoing datagrams from ULP */
  174                                         /* NOTE: does not include forwrads */
  175         uint64_t ifs6_out_discard;      /* # of discarded datagrams */
  176         uint64_t ifs6_out_fragok;       /* # of datagrams fragmented */
  177         uint64_t ifs6_out_fragfail;     /* # of datagrams failed on fragment */
  178         uint64_t ifs6_out_fragcreat;    /* # of fragment datagrams */
  179                                         /* NOTE: this is # after fragment */
  180         uint64_t ifs6_reass_reqd;       /* # of incoming fragmented packets */
  181                                         /* NOTE: increment on final dst if */
  182         uint64_t ifs6_reass_ok;         /* # of reassembled packets */
  183                                         /* NOTE: this is # after reass */
  184                                         /* NOTE: increment on final dst if */
  185         uint64_t ifs6_reass_fail;       /* # of reass failures */
  186                                         /* NOTE: may not be packet count */
  187                                         /* NOTE: increment on final dst if */
  188         uint64_t ifs6_in_mcast;         /* # of inbound multicast datagrams */
  189         uint64_t ifs6_out_mcast;        /* # of outbound multicast datagrams */
  190 };
  191 
  192 /*
  193  * ICMPv6 interface statistics, as defined in RFC2466 Ipv6IfIcmpEntry.
  194  * XXX: I'm not sure if this file is the right place for this structure...
  195  */
  196 struct icmp6_ifstat {
  197         /*
  198          * Input statistics
  199          */
  200         /* ipv6IfIcmpInMsgs, total # of input messages */
  201         uint64_t ifs6_in_msg;
  202         /* ipv6IfIcmpInErrors, # of input error messages */
  203         uint64_t ifs6_in_error;
  204         /* ipv6IfIcmpInDestUnreachs, # of input dest unreach errors */
  205         uint64_t ifs6_in_dstunreach;
  206         /* ipv6IfIcmpInAdminProhibs, # of input administratively prohibited errs */
  207         uint64_t ifs6_in_adminprohib;
  208         /* ipv6IfIcmpInTimeExcds, # of input time exceeded errors */
  209         uint64_t ifs6_in_timeexceed;
  210         /* ipv6IfIcmpInParmProblems, # of input parameter problem errors */
  211         uint64_t ifs6_in_paramprob;
  212         /* ipv6IfIcmpInPktTooBigs, # of input packet too big errors */
  213         uint64_t ifs6_in_pkttoobig;
  214         /* ipv6IfIcmpInEchos, # of input echo requests */
  215         uint64_t ifs6_in_echo;
  216         /* ipv6IfIcmpInEchoReplies, # of input echo replies */
  217         uint64_t ifs6_in_echoreply;
  218         /* ipv6IfIcmpInRouterSolicits, # of input router solicitations */
  219         uint64_t ifs6_in_routersolicit;
  220         /* ipv6IfIcmpInRouterAdvertisements, # of input router advertisements */
  221         uint64_t ifs6_in_routeradvert;
  222         /* ipv6IfIcmpInNeighborSolicits, # of input neighbor solicitations */
  223         uint64_t ifs6_in_neighborsolicit;
  224         /* ipv6IfIcmpInNeighborAdvertisements, # of input neighbor advertisements */
  225         uint64_t ifs6_in_neighboradvert;
  226         /* ipv6IfIcmpInRedirects, # of input redirects */
  227         uint64_t ifs6_in_redirect;
  228         /* ipv6IfIcmpInGroupMembQueries, # of input MLD queries */
  229         uint64_t ifs6_in_mldquery;
  230         /* ipv6IfIcmpInGroupMembResponses, # of input MLD reports */
  231         uint64_t ifs6_in_mldreport;
  232         /* ipv6IfIcmpInGroupMembReductions, # of input MLD done */
  233         uint64_t ifs6_in_mlddone;
  234 
  235         /*
  236          * Output statistics. We should solve unresolved routing problem...
  237          */
  238         /* ipv6IfIcmpOutMsgs, total # of output messages */
  239         uint64_t ifs6_out_msg;
  240         /* ipv6IfIcmpOutErrors, # of output error messages */
  241         uint64_t ifs6_out_error;
  242         /* ipv6IfIcmpOutDestUnreachs, # of output dest unreach errors */
  243         uint64_t ifs6_out_dstunreach;
  244         /* ipv6IfIcmpOutAdminProhibs, # of output administratively prohibited errs */
  245         uint64_t ifs6_out_adminprohib;
  246         /* ipv6IfIcmpOutTimeExcds, # of output time exceeded errors */
  247         uint64_t ifs6_out_timeexceed;
  248         /* ipv6IfIcmpOutParmProblems, # of output parameter problem errors */
  249         uint64_t ifs6_out_paramprob;
  250         /* ipv6IfIcmpOutPktTooBigs, # of output packet too big errors */
  251         uint64_t ifs6_out_pkttoobig;
  252         /* ipv6IfIcmpOutEchos, # of output echo requests */
  253         uint64_t ifs6_out_echo;
  254         /* ipv6IfIcmpOutEchoReplies, # of output echo replies */
  255         uint64_t ifs6_out_echoreply;
  256         /* ipv6IfIcmpOutRouterSolicits, # of output router solicitations */
  257         uint64_t ifs6_out_routersolicit;
  258         /* ipv6IfIcmpOutRouterAdvertisements, # of output router advertisements */
  259         uint64_t ifs6_out_routeradvert;
  260         /* ipv6IfIcmpOutNeighborSolicits, # of output neighbor solicitations */
  261         uint64_t ifs6_out_neighborsolicit;
  262         /* ipv6IfIcmpOutNeighborAdvertisements, # of output neighbor advertisements */
  263         uint64_t ifs6_out_neighboradvert;
  264         /* ipv6IfIcmpOutRedirects, # of output redirects */
  265         uint64_t ifs6_out_redirect;
  266         /* ipv6IfIcmpOutGroupMembQueries, # of output MLD queries */
  267         uint64_t ifs6_out_mldquery;
  268         /* ipv6IfIcmpOutGroupMembResponses, # of output MLD reports */
  269         uint64_t ifs6_out_mldreport;
  270         /* ipv6IfIcmpOutGroupMembReductions, # of output MLD done */
  271         uint64_t ifs6_out_mlddone;
  272 };
  273 
  274 struct  in6_ifreq {
  275         char    ifr_name[IFNAMSIZ];
  276         union {
  277                 struct  sockaddr_in6 ifru_addr;
  278                 struct  sockaddr_in6 ifru_dstaddr;
  279                 int     ifru_flags;
  280                 int     ifru_flags6;
  281                 int     ifru_metric;
  282                 caddr_t ifru_data;
  283                 struct in6_addrlifetime ifru_lifetime;
  284                 struct in6_ifstat ifru_stat;
  285                 struct icmp6_ifstat ifru_icmp6stat;
  286                 u_int32_t ifru_scope_id[16];
  287         } ifr_ifru;
  288 };
  289 
  290 struct  in6_aliasreq {
  291         char    ifra_name[IFNAMSIZ];
  292         struct  sockaddr_in6 ifra_addr;
  293         struct  sockaddr_in6 ifra_dstaddr;
  294         struct  sockaddr_in6 ifra_prefixmask;
  295         int     ifra_flags;
  296         struct in6_addrlifetime ifra_lifetime;
  297         int     ifra_vhid;
  298 };
  299 
  300 /* pre-10.x compat */
  301 struct  oin6_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 };
  309 
  310 /* prefix type macro */
  311 #define IN6_PREFIX_ND   1
  312 #define IN6_PREFIX_RR   2
  313 
  314 /*
  315  * prefix related flags passed between kernel(NDP related part) and
  316  * user land command(ifconfig) and daemon(rtadvd).
  317  */
  318 struct in6_prflags {
  319         struct prf_ra {
  320                 u_char onlink : 1;
  321                 u_char autonomous : 1;
  322                 u_char reserved : 6;
  323         } prf_ra;
  324         u_char prf_reserved1;
  325         u_short prf_reserved2;
  326         /* want to put this on 4byte offset */
  327         struct prf_rr {
  328                 u_char decrvalid : 1;
  329                 u_char decrprefd : 1;
  330                 u_char reserved : 6;
  331         } prf_rr;
  332         u_char prf_reserved3;
  333         u_short prf_reserved4;
  334 };
  335 
  336 struct  in6_prefixreq {
  337         char    ipr_name[IFNAMSIZ];
  338         u_char  ipr_origin;
  339         u_char  ipr_plen;
  340         u_int32_t ipr_vltime;
  341         u_int32_t ipr_pltime;
  342         struct in6_prflags ipr_flags;
  343         struct  sockaddr_in6 ipr_prefix;
  344 };
  345 
  346 #define PR_ORIG_RA      0
  347 #define PR_ORIG_RR      1
  348 #define PR_ORIG_STATIC  2
  349 #define PR_ORIG_KERNEL  3
  350 
  351 #define ipr_raf_onlink          ipr_flags.prf_ra.onlink
  352 #define ipr_raf_auto            ipr_flags.prf_ra.autonomous
  353 
  354 #define ipr_statef_onlink       ipr_flags.prf_state.onlink
  355 
  356 #define ipr_rrf_decrvalid       ipr_flags.prf_rr.decrvalid
  357 #define ipr_rrf_decrprefd       ipr_flags.prf_rr.decrprefd
  358 
  359 struct  in6_rrenumreq {
  360         char    irr_name[IFNAMSIZ];
  361         u_char  irr_origin;
  362         u_char  irr_m_len;      /* match len for matchprefix */
  363         u_char  irr_m_minlen;   /* minlen for matching prefix */
  364         u_char  irr_m_maxlen;   /* maxlen for matching prefix */
  365         u_char  irr_u_uselen;   /* uselen for adding prefix */
  366         u_char  irr_u_keeplen;  /* keeplen from matching prefix */
  367         struct irr_raflagmask {
  368                 u_char onlink : 1;
  369                 u_char autonomous : 1;
  370                 u_char reserved : 6;
  371         } irr_raflagmask;
  372         u_int32_t irr_vltime;
  373         u_int32_t irr_pltime;
  374         struct in6_prflags irr_flags;
  375         struct  sockaddr_in6 irr_matchprefix;
  376         struct  sockaddr_in6 irr_useprefix;
  377 };
  378 
  379 #define irr_raf_mask_onlink     irr_raflagmask.onlink
  380 #define irr_raf_mask_auto       irr_raflagmask.autonomous
  381 #define irr_raf_mask_reserved   irr_raflagmask.reserved
  382 
  383 #define irr_raf_onlink          irr_flags.prf_ra.onlink
  384 #define irr_raf_auto            irr_flags.prf_ra.autonomous
  385 
  386 #define irr_statef_onlink       irr_flags.prf_state.onlink
  387 
  388 #define irr_rrf                 irr_flags.prf_rr
  389 #define irr_rrf_decrvalid       irr_flags.prf_rr.decrvalid
  390 #define irr_rrf_decrprefd       irr_flags.prf_rr.decrprefd
  391 
  392 /*
  393  * Given a pointer to an in6_ifaddr (ifaddr),
  394  * return a pointer to the addr as a sockaddr_in6
  395  */
  396 #define IA6_IN6(ia)     (&((ia)->ia_addr.sin6_addr))
  397 #define IA6_DSTIN6(ia)  (&((ia)->ia_dstaddr.sin6_addr))
  398 #define IA6_MASKIN6(ia) (&((ia)->ia_prefixmask.sin6_addr))
  399 #define IA6_SIN6(ia)    (&((ia)->ia_addr))
  400 #define IA6_DSTSIN6(ia) (&((ia)->ia_dstaddr))
  401 #define IFA_IN6(x)      (&((struct sockaddr_in6 *)((x)->ifa_addr))->sin6_addr)
  402 #define IFA_DSTIN6(x)   (&((struct sockaddr_in6 *)((x)->ifa_dstaddr))->sin6_addr)
  403 
  404 #define IFPR_IN6(x)     (&((struct sockaddr_in6 *)((x)->ifpr_prefix))->sin6_addr)
  405 
  406 #ifdef _KERNEL
  407 #define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m)      (       \
  408         (((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \
  409         (((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \
  410         (((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \
  411         (((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 )
  412 #define IN6_MASK_ADDR(a, m)     do { \
  413         (a)->s6_addr32[0] &= (m)->s6_addr32[0]; \
  414         (a)->s6_addr32[1] &= (m)->s6_addr32[1]; \
  415         (a)->s6_addr32[2] &= (m)->s6_addr32[2]; \
  416         (a)->s6_addr32[3] &= (m)->s6_addr32[3]; \
  417 } while (0)
  418 #endif
  419 
  420 #define SIOCSIFADDR_IN6          _IOW('i', 12, struct in6_ifreq)
  421 #define SIOCGIFADDR_IN6         _IOWR('i', 33, struct in6_ifreq)
  422 
  423 #ifdef _KERNEL
  424 /*
  425  * SIOCSxxx ioctls should be unused (see comments in in6.c), but
  426  * we do not shift numbers for binary compatibility.
  427  */
  428 #define SIOCSIFDSTADDR_IN6       _IOW('i', 14, struct in6_ifreq)
  429 #define SIOCSIFNETMASK_IN6       _IOW('i', 22, struct in6_ifreq)
  430 #endif
  431 
  432 #define SIOCGIFDSTADDR_IN6      _IOWR('i', 34, struct in6_ifreq)
  433 #define SIOCGIFNETMASK_IN6      _IOWR('i', 37, struct in6_ifreq)
  434 
  435 #define SIOCDIFADDR_IN6          _IOW('i', 25, struct in6_ifreq)
  436 #define OSIOCAIFADDR_IN6         _IOW('i', 26, struct oin6_aliasreq)
  437 #define SIOCAIFADDR_IN6          _IOW('i', 27, struct in6_aliasreq)
  438 
  439 #define SIOCSIFPHYADDR_IN6       _IOW('i', 70, struct in6_aliasreq)
  440 #define SIOCGIFPSRCADDR_IN6     _IOWR('i', 71, struct in6_ifreq)
  441 #define SIOCGIFPDSTADDR_IN6     _IOWR('i', 72, struct in6_ifreq)
  442 
  443 #define SIOCGIFAFLAG_IN6        _IOWR('i', 73, struct in6_ifreq)
  444 
  445 #ifdef _KERNEL
  446 #define OSIOCGIFINFO_IN6        _IOWR('i', 76, struct in6_ondireq)
  447 #endif
  448 #define SIOCGIFINFO_IN6         _IOWR('i', 108, struct in6_ndireq)
  449 #define SIOCSIFINFO_IN6         _IOWR('i', 109, struct in6_ndireq)
  450 #define SIOCSNDFLUSH_IN6        _IOWR('i', 77, struct in6_ifreq)
  451 #define SIOCGNBRINFO_IN6        _IOWR('i', 78, struct in6_nbrinfo)
  452 #define SIOCSPFXFLUSH_IN6       _IOWR('i', 79, struct in6_ifreq)
  453 #define SIOCSRTRFLUSH_IN6       _IOWR('i', 80, struct in6_ifreq)
  454 
  455 #define SIOCGIFALIFETIME_IN6    _IOWR('i', 81, struct in6_ifreq)
  456 #define SIOCGIFSTAT_IN6         _IOWR('i', 83, struct in6_ifreq)
  457 #define SIOCGIFSTAT_ICMP6       _IOWR('i', 84, struct in6_ifreq)
  458 
  459 #define SIOCSDEFIFACE_IN6       _IOWR('i', 85, struct in6_ndifreq)
  460 #define SIOCGDEFIFACE_IN6       _IOWR('i', 86, struct in6_ndifreq)
  461 
  462 #define SIOCSIFINFO_FLAGS       _IOWR('i', 87, struct in6_ndireq) /* XXX */
  463 
  464 #define SIOCSSCOPE6             _IOW('i', 88, struct in6_ifreq)
  465 #define SIOCGSCOPE6             _IOWR('i', 89, struct in6_ifreq)
  466 #define SIOCGSCOPE6DEF          _IOWR('i', 90, struct in6_ifreq)
  467 
  468 #define SIOCSIFPREFIX_IN6       _IOW('i', 100, struct in6_prefixreq) /* set */
  469 #define SIOCGIFPREFIX_IN6       _IOWR('i', 101, struct in6_prefixreq) /* get */
  470 #define SIOCDIFPREFIX_IN6       _IOW('i', 102, struct in6_prefixreq) /* del */
  471 #define SIOCAIFPREFIX_IN6       _IOW('i', 103, struct in6_rrenumreq) /* add */
  472 #define SIOCCIFPREFIX_IN6       _IOW('i', 104, \
  473                                      struct in6_rrenumreq) /* change */
  474 #define SIOCSGIFPREFIX_IN6      _IOW('i', 105, \
  475                                      struct in6_rrenumreq) /* set global */
  476 
  477 #define SIOCGETSGCNT_IN6        _IOWR('u', 106, \
  478                                       struct sioc_sg_req6) /* get s,g pkt cnt */
  479 #define SIOCGETMIFCNT_IN6       _IOWR('u', 107, \
  480                                       struct sioc_mif_req6) /* get pkt cnt per if */
  481 
  482 #define SIOCAADDRCTL_POLICY     _IOW('u', 108, struct in6_addrpolicy)
  483 #define SIOCDADDRCTL_POLICY     _IOW('u', 109, struct in6_addrpolicy)
  484 
  485 #define IN6_IFF_ANYCAST         0x01    /* anycast address */
  486 #define IN6_IFF_TENTATIVE       0x02    /* tentative address */
  487 #define IN6_IFF_DUPLICATED      0x04    /* DAD detected duplicate */
  488 #define IN6_IFF_DETACHED        0x08    /* may be detached from the link */
  489 #define IN6_IFF_DEPRECATED      0x10    /* deprecated address */
  490 #define IN6_IFF_NODAD           0x20    /* don't perform DAD on this address
  491                                          * (obsolete)
  492                                          */
  493 #define IN6_IFF_AUTOCONF        0x40    /* autoconfigurable address. */
  494 #define IN6_IFF_TEMPORARY       0x80    /* temporary (anonymous) address. */
  495 #define IN6_IFF_PREFER_SOURCE   0x0100  /* preferred address for SAS */
  496 
  497 /* do not input/output */
  498 #define IN6_IFF_NOTREADY (IN6_IFF_TENTATIVE|IN6_IFF_DUPLICATED)
  499 
  500 #ifdef _KERNEL
  501 #define IN6_ARE_SCOPE_CMP(a,b) ((a)-(b))
  502 #define IN6_ARE_SCOPE_EQUAL(a,b) ((a)==(b))
  503 #endif
  504 
  505 #ifdef _KERNEL
  506 VNET_DECLARE(struct in6_ifaddrhead, in6_ifaddrhead);
  507 VNET_DECLARE(struct in6_ifaddrlisthead *, in6_ifaddrhashtbl);
  508 VNET_DECLARE(u_long, in6_ifaddrhmask);
  509 #define V_in6_ifaddrhead                VNET(in6_ifaddrhead)
  510 #define V_in6_ifaddrhashtbl             VNET(in6_ifaddrhashtbl)
  511 #define V_in6_ifaddrhmask               VNET(in6_ifaddrhmask)
  512 
  513 #define IN6ADDR_NHASH_LOG2              8
  514 #define IN6ADDR_NHASH                   (1 << IN6ADDR_NHASH_LOG2)
  515 #define IN6ADDR_HASHVAL(x)              (in6_addrhash(x))
  516 #define IN6ADDR_HASH(x) \
  517     (&V_in6_ifaddrhashtbl[IN6ADDR_HASHVAL(x) & V_in6_ifaddrhmask])
  518 
  519 static __inline uint32_t
  520 in6_addrhash(const struct in6_addr *in6)
  521 {
  522         uint32_t x;
  523 
  524         x = in6->s6_addr32[0] ^ in6->s6_addr32[1] ^ in6->s6_addr32[2] ^
  525             in6->s6_addr32[3];
  526         return (fnv_32_buf(&x, sizeof(x), FNV1_32_INIT));
  527 }
  528 
  529 extern struct rmlock in6_ifaddr_lock;
  530 #define IN6_IFADDR_LOCK_ASSERT()        rm_assert(&in6_ifaddr_lock, RA_LOCKED)
  531 #define IN6_IFADDR_RLOCK(t)             rm_rlock(&in6_ifaddr_lock, (t))
  532 #define IN6_IFADDR_RLOCK_ASSERT()       rm_assert(&in6_ifaddr_lock, RA_RLOCKED)
  533 #define IN6_IFADDR_RUNLOCK(t)           rm_runlock(&in6_ifaddr_lock, (t))
  534 #define IN6_IFADDR_WLOCK()              rm_wlock(&in6_ifaddr_lock)
  535 #define IN6_IFADDR_WLOCK_ASSERT()       rm_assert(&in6_ifaddr_lock, RA_WLOCKED)
  536 #define IN6_IFADDR_WUNLOCK()            rm_wunlock(&in6_ifaddr_lock)
  537 
  538 #define in6_ifstat_inc(ifp, tag) \
  539 do {                                                            \
  540         if (ifp)                                                \
  541                 counter_u64_add(((struct in6_ifextra *)         \
  542                     ((ifp)->if_afdata[AF_INET6]))->in6_ifstat[  \
  543                     offsetof(struct in6_ifstat, tag) / sizeof(uint64_t)], 1);\
  544 } while (/*CONSTCOND*/ 0)
  545 
  546 extern u_char inet6ctlerrmap[];
  547 VNET_DECLARE(unsigned long, in6_maxmtu);
  548 #define V_in6_maxmtu                    VNET(in6_maxmtu)
  549 #endif /* _KERNEL */
  550 
  551 /*
  552  * IPv6 multicast MLD-layer source entry.
  553  */
  554 struct ip6_msource {
  555         RB_ENTRY(ip6_msource)   im6s_link;      /* RB tree links */
  556         struct in6_addr         im6s_addr;
  557         struct im6s_st {
  558                 uint16_t        ex;             /* # of exclusive members */
  559                 uint16_t        in;             /* # of inclusive members */
  560         }                       im6s_st[2];     /* state at t0, t1 */
  561         uint8_t                 im6s_stp;       /* pending query */
  562 };
  563 RB_HEAD(ip6_msource_tree, ip6_msource);
  564 
  565 /*
  566  * IPv6 multicast PCB-layer source entry.
  567  *
  568  * NOTE: overlapping use of struct ip6_msource fields at start.
  569  */
  570 struct in6_msource {
  571         RB_ENTRY(ip6_msource)   im6s_link;      /* Common field */
  572         struct in6_addr         im6s_addr;      /* Common field */
  573         uint8_t                 im6sl_st[2];    /* state before/at commit */
  574 };
  575 
  576 #ifdef _KERNEL
  577 /*
  578  * IPv6 source tree comparison function.
  579  *
  580  * An ordered predicate is necessary; bcmp() is not documented to return
  581  * an indication of order, memcmp() is, and is an ISO C99 requirement.
  582  */
  583 static __inline int
  584 ip6_msource_cmp(const struct ip6_msource *a, const struct ip6_msource *b)
  585 {
  586 
  587         return (memcmp(&a->im6s_addr, &b->im6s_addr, sizeof(struct in6_addr)));
  588 }
  589 RB_PROTOTYPE(ip6_msource_tree, ip6_msource, im6s_link, ip6_msource_cmp);
  590 
  591 /*
  592  * IPv6 multicast PCB-layer group filter descriptor.
  593  */
  594 struct in6_mfilter {
  595         struct ip6_msource_tree im6f_sources; /* source list for (S,G) */
  596         u_long                  im6f_nsrc;    /* # of source entries */
  597         uint8_t                 im6f_st[2];   /* state before/at commit */
  598 };
  599 
  600 /*
  601  * Legacy KAME IPv6 multicast membership descriptor.
  602  */
  603 struct in6_multi_mship {
  604         struct  in6_multi *i6mm_maddr;
  605         LIST_ENTRY(in6_multi_mship) i6mm_chain;
  606 };
  607 
  608 /*
  609  * IPv6 group descriptor.
  610  *
  611  * For every entry on an ifnet's if_multiaddrs list which represents
  612  * an IP multicast group, there is one of these structures.
  613  *
  614  * If any source filters are present, then a node will exist in the RB-tree
  615  * to permit fast lookup by source whenever an operation takes place.
  616  * This permits pre-order traversal when we issue reports.
  617  * Source filter trees are kept separately from the socket layer to
  618  * greatly simplify locking.
  619  *
  620  * When MLDv2 is active, in6m_timer is the response to group query timer.
  621  * The state-change timer in6m_sctimer is separate; whenever state changes
  622  * for the group the state change record is generated and transmitted,
  623  * and kept if retransmissions are necessary.
  624  *
  625  * FUTURE: in6m_link is now only used when groups are being purged
  626  * on a detaching ifnet. It could be demoted to a SLIST_ENTRY, but
  627  * because it is at the very start of the struct, we can't do this
  628  * w/o breaking the ABI for ifmcstat.
  629  */
  630 struct in6_multi {
  631         LIST_ENTRY(in6_multi) in6m_entry; /* list glue */
  632         struct  in6_addr in6m_addr;     /* IPv6 multicast address */
  633         struct  ifnet *in6m_ifp;        /* back pointer to ifnet */
  634         struct  ifmultiaddr *in6m_ifma; /* back pointer to ifmultiaddr */
  635         u_int   in6m_refcount;          /* reference count */
  636         u_int   in6m_state;             /* state of the membership */
  637         u_int   in6m_timer;             /* MLD6 listener report timer */
  638 
  639         /* New fields for MLDv2 follow. */
  640         struct mld_ifsoftc      *in6m_mli;      /* MLD info */
  641         SLIST_ENTRY(in6_multi)   in6m_nrele;    /* to-be-released by MLD */
  642         struct ip6_msource_tree  in6m_srcs;     /* tree of sources */
  643         u_long                   in6m_nsrc;     /* # of tree entries */
  644 
  645         struct mbufq             in6m_scq;      /* queue of pending
  646                                                  * state-change packets */
  647         struct timeval           in6m_lastgsrtv;        /* last G-S-R query */
  648         uint16_t                 in6m_sctimer;  /* state-change timer */
  649         uint16_t                 in6m_scrv;     /* state-change rexmit count */
  650 
  651         /*
  652          * SSM state counters which track state at T0 (the time the last
  653          * state-change report's RV timer went to zero) and T1
  654          * (time of pending report, i.e. now).
  655          * Used for computing MLDv2 state-change reports. Several refcounts
  656          * are maintained here to optimize for common use-cases.
  657          */
  658         struct in6m_st {
  659                 uint16_t        iss_fmode;      /* MLD filter mode */
  660                 uint16_t        iss_asm;        /* # of ASM listeners */
  661                 uint16_t        iss_ex;         /* # of exclusive members */
  662                 uint16_t        iss_in;         /* # of inclusive members */
  663                 uint16_t        iss_rec;        /* # of recorded sources */
  664         }                       in6m_st[2];     /* state at t0, t1 */
  665 };
  666 
  667 /*
  668  * Helper function to derive the filter mode on a source entry
  669  * from its internal counters. Predicates are:
  670  *  A source is only excluded if all listeners exclude it.
  671  *  A source is only included if no listeners exclude it,
  672  *  and at least one listener includes it.
  673  * May be used by ifmcstat(8).
  674  */
  675 static __inline uint8_t
  676 im6s_get_mode(const struct in6_multi *inm, const struct ip6_msource *ims,
  677     uint8_t t)
  678 {
  679 
  680         t = !!t;
  681         if (inm->in6m_st[t].iss_ex > 0 &&
  682             inm->in6m_st[t].iss_ex == ims->im6s_st[t].ex)
  683                 return (MCAST_EXCLUDE);
  684         else if (ims->im6s_st[t].in > 0 && ims->im6s_st[t].ex == 0)
  685                 return (MCAST_INCLUDE);
  686         return (MCAST_UNDEFINED);
  687 }
  688 
  689 /*
  690  * Lock macros for IPv6 layer multicast address lists.  IPv6 lock goes
  691  * before link layer multicast locks in the lock order.  In most cases,
  692  * consumers of IN_*_MULTI() macros should acquire the locks before
  693  * calling them; users of the in_{add,del}multi() functions should not.
  694  */
  695 extern struct mtx in6_multi_mtx;
  696 #define IN6_MULTI_LOCK()                mtx_lock(&in6_multi_mtx)
  697 #define IN6_MULTI_UNLOCK()              mtx_unlock(&in6_multi_mtx)
  698 #define IN6_MULTI_LOCK_ASSERT()         mtx_assert(&in6_multi_mtx, MA_OWNED)
  699 #define IN6_MULTI_UNLOCK_ASSERT()       mtx_assert(&in6_multi_mtx, MA_NOTOWNED)
  700 
  701 /*
  702  * Look up an in6_multi record for an IPv6 multicast address
  703  * on the interface ifp.
  704  * If no record found, return NULL.
  705  *
  706  * SMPng: The IN6_MULTI_LOCK and IF_ADDR_LOCK on ifp must be held.
  707  */
  708 static __inline struct in6_multi *
  709 in6m_lookup_locked(struct ifnet *ifp, const struct in6_addr *mcaddr)
  710 {
  711         struct ifmultiaddr *ifma;
  712         struct in6_multi *inm;
  713 
  714         IN6_MULTI_LOCK_ASSERT();
  715         IF_ADDR_LOCK_ASSERT(ifp);
  716 
  717         inm = NULL;
  718         TAILQ_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) {
  719                 if (ifma->ifma_addr->sa_family == AF_INET6) {
  720                         inm = (struct in6_multi *)ifma->ifma_protospec;
  721                         if (IN6_ARE_ADDR_EQUAL(&inm->in6m_addr, mcaddr))
  722                                 break;
  723                         inm = NULL;
  724                 }
  725         }
  726         return (inm);
  727 }
  728 
  729 /*
  730  * Wrapper for in6m_lookup_locked().
  731  *
  732  * SMPng: Assumes that neithr the IN6_MULTI_LOCK() or IF_ADDR_LOCK() are held.
  733  */
  734 static __inline struct in6_multi *
  735 in6m_lookup(struct ifnet *ifp, const struct in6_addr *mcaddr)
  736 {
  737         struct in6_multi *inm;
  738 
  739         IN6_MULTI_LOCK();
  740         IF_ADDR_RLOCK(ifp);
  741         inm = in6m_lookup_locked(ifp, mcaddr);
  742         IF_ADDR_RUNLOCK(ifp);
  743         IN6_MULTI_UNLOCK();
  744 
  745         return (inm);
  746 }
  747 
  748 /* Acquire an in6_multi record. */
  749 static __inline void
  750 in6m_acquire_locked(struct in6_multi *inm)
  751 {
  752 
  753         IN6_MULTI_LOCK_ASSERT();
  754         ++inm->in6m_refcount;
  755 }
  756 
  757 struct ip6_moptions;
  758 struct sockopt;
  759 
  760 /* Multicast KPIs. */
  761 int     im6o_mc_filter(const struct ip6_moptions *, const struct ifnet *,
  762             const struct sockaddr *, const struct sockaddr *);
  763 int     in6_mc_join(struct ifnet *, const struct in6_addr *,
  764             struct in6_mfilter *, struct in6_multi **, int);
  765 int     in6_mc_join_locked(struct ifnet *, const struct in6_addr *,
  766             struct in6_mfilter *, struct in6_multi **, int);
  767 int     in6_mc_leave(struct in6_multi *, struct in6_mfilter *);
  768 int     in6_mc_leave_locked(struct in6_multi *, struct in6_mfilter *);
  769 void    in6m_clear_recorded(struct in6_multi *);
  770 void    in6m_commit(struct in6_multi *);
  771 void    in6m_print(const struct in6_multi *);
  772 int     in6m_record_source(struct in6_multi *, const struct in6_addr *);
  773 void    in6m_release_locked(struct in6_multi *);
  774 void    ip6_freemoptions(struct ip6_moptions *);
  775 int     ip6_getmoptions(struct inpcb *, struct sockopt *);
  776 int     ip6_setmoptions(struct inpcb *, struct sockopt *);
  777 
  778 /* Legacy KAME multicast KPIs. */
  779 struct in6_multi_mship *
  780         in6_joingroup(struct ifnet *, struct in6_addr *, int *, int);
  781 int     in6_leavegroup(struct in6_multi_mship *);
  782 
  783 /* flags to in6_update_ifa */
  784 #define IN6_IFAUPDATE_DADDELAY  0x1 /* first time to configure an address */
  785 
  786 int     in6_mask2len(struct in6_addr *, u_char *);
  787 int     in6_control(struct socket *, u_long, caddr_t, struct ifnet *,
  788         struct thread *);
  789 int     in6_update_ifa(struct ifnet *, struct in6_aliasreq *,
  790         struct in6_ifaddr *, int);
  791 void    in6_prepare_ifra(struct in6_aliasreq *, const struct in6_addr *,
  792         const struct in6_addr *);
  793 void    in6_purgeaddr(struct ifaddr *);
  794 int     in6if_do_dad(struct ifnet *);
  795 void    in6_savemkludge(struct in6_ifaddr *);
  796 void    *in6_domifattach(struct ifnet *);
  797 void    in6_domifdetach(struct ifnet *, void *);
  798 int     in6_domifmtu(struct ifnet *);
  799 void    in6_setmaxmtu(void);
  800 int     in6_if2idlen(struct ifnet *);
  801 struct in6_ifaddr *in6ifa_ifpforlinklocal(struct ifnet *, int);
  802 struct in6_ifaddr *in6ifa_ifpwithaddr(struct ifnet *, const struct in6_addr *);
  803 struct in6_ifaddr *in6ifa_ifwithaddr(const struct in6_addr *, uint32_t);
  804 struct in6_ifaddr *in6ifa_llaonifp(struct ifnet *);
  805 int     in6_addr2zoneid(struct ifnet *, struct in6_addr *, u_int32_t *);
  806 int     in6_matchlen(struct in6_addr *, struct in6_addr *);
  807 int     in6_are_prefix_equal(struct in6_addr *, struct in6_addr *, int);
  808 void    in6_prefixlen2mask(struct in6_addr *, int);
  809 int     in6_prefix_ioctl(struct socket *, u_long, caddr_t,
  810         struct ifnet *);
  811 int     in6_prefix_add_ifid(int, struct in6_ifaddr *);
  812 void    in6_prefix_remove_ifid(int, struct in6_ifaddr *);
  813 void    in6_purgeprefix(struct ifnet *);
  814 
  815 int     in6_is_addr_deprecated(struct sockaddr_in6 *);
  816 int     in6_src_ioctl(u_long, caddr_t);
  817 
  818 void    in6_newaddrmsg(struct in6_ifaddr *, int);
  819 /*
  820  * Extended API for IPv6 FIB support.
  821  */
  822 void    in6_rtredirect(struct sockaddr *, struct sockaddr *, struct sockaddr *,
  823             int, struct sockaddr *, u_int);
  824 int     in6_rtrequest(int, struct sockaddr *, struct sockaddr *,
  825             struct sockaddr *, int, struct rtentry **, u_int);
  826 void    in6_rtalloc(struct route_in6 *, u_int);
  827 void    in6_rtalloc_ign(struct route_in6 *, u_long, u_int);
  828 struct rtentry *in6_rtalloc1(struct sockaddr *, int, u_long, u_int);
  829 #endif /* _KERNEL */
  830 
  831 #endif /* _NETINET6_IN6_VAR_H_ */

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