sys/netinet6/in6_var.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      $KAME: in6_var.h,v 1.56 2001/03/29 05:34:31 itojun Exp $
  32  */
  33
  34 /*-
  35  * Copyright (c) 1985, 1986, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  */
  62
  63 #ifndef _NETINET6_IN6_VAR_H_
  64 #define _NETINET6_IN6_VAR_H_
  65
  66 #include <sys/tree.h>
  67 #include <sys/counter.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_ifsoftc;
 100 struct in6_multi;
 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
 115 SLIST_HEAD(in6_multi_head, in6_multi);
 116 MALLOC_DECLARE(M_IP6MADDR);
 117
 118 struct in6_ifaddr {
 119         struct  ifaddr ia_ifa;          /* protocol-independent info */
 120 #define ia_ifp          ia_ifa.ifa_ifp
 121 #define ia_flags        ia_ifa.ifa_flags
 122         struct  sockaddr_in6 ia_addr;   /* interface address */
 123         struct  sockaddr_in6 ia_net;    /* network number of interface */
 124         struct  sockaddr_in6 ia_dstaddr; /* space for destination addr */
 125         struct  sockaddr_in6 ia_prefixmask; /* prefix mask */
 126         u_int32_t ia_plen;              /* prefix length */
 127         CK_STAILQ_ENTRY(in6_ifaddr)     ia_link;        /* list of IPv6 addresses */
 128         int     ia6_flags;
 129
 130         struct in6_addrlifetime ia6_lifetime;
 131         time_t  ia6_createtime; /* the creation time of this address, which is
 132                                  * currently used for temporary addresses only.
 133                                  */
 134         time_t  ia6_updatetime;
 135
 136         /* back pointer to the ND prefix (for autoconfigured addresses only) */
 137         struct nd_prefix *ia6_ndpr;
 138
 139         /* multicast addresses joined from the kernel */
 140         LIST_HEAD(, in6_multi_mship) ia6_memberships;
 141         /* entry in bucket of inet6 addresses */
 142         CK_LIST_ENTRY(in6_ifaddr) ia6_hash;
 143 };
 144
 145 /* List of in6_ifaddr's. */
 146 CK_STAILQ_HEAD(in6_ifaddrhead, in6_ifaddr);
 147 CK_LIST_HEAD(in6_ifaddrlisthead, in6_ifaddr);
 148 #endif  /* _KERNEL */
 149
 150 /* control structure to manage address selection policy */
 151 struct in6_addrpolicy {
 152         struct sockaddr_in6 addr; /* prefix address */
 153         struct sockaddr_in6 addrmask; /* prefix mask */
 154         int preced;             /* precedence */
 155         int label;              /* matching label */
 156         u_quad_t use;           /* statistics */
 157 };
 158
 159 /*
 160  * IPv6 interface statistics, as defined in RFC2465 Ipv6IfStatsEntry (p12).
 161  */
 162 struct in6_ifstat {
 163         uint64_t ifs6_in_receive;       /* # of total input datagram */
 164         uint64_t ifs6_in_hdrerr;        /* # of datagrams with invalid hdr */
 165         uint64_t ifs6_in_toobig;        /* # of datagrams exceeded MTU */
 166         uint64_t ifs6_in_noroute;       /* # of datagrams with no route */
 167         uint64_t ifs6_in_addrerr;       /* # of datagrams with invalid dst */
 168         uint64_t ifs6_in_protounknown;  /* # of datagrams with unknown proto */
 169                                         /* NOTE: increment on final dst if */
 170         uint64_t ifs6_in_truncated;     /* # of truncated datagrams */
 171         uint64_t ifs6_in_discard;       /* # of discarded datagrams */
 172                                         /* NOTE: fragment timeout is not here */
 173         uint64_t ifs6_in_deliver;       /* # of datagrams delivered to ULP */
 174                                         /* NOTE: increment on final dst if */
 175         uint64_t ifs6_out_forward;      /* # of datagrams forwarded */
 176                                         /* NOTE: increment on outgoing if */
 177         uint64_t ifs6_out_request;      /* # of outgoing datagrams from ULP */
 178                                         /* NOTE: does not include forwrads */
 179         uint64_t ifs6_out_discard;      /* # of discarded datagrams */
 180         uint64_t ifs6_out_fragok;       /* # of datagrams fragmented */
 181         uint64_t ifs6_out_fragfail;     /* # of datagrams failed on fragment */
 182         uint64_t ifs6_out_fragcreat;    /* # of fragment datagrams */
 183                                         /* NOTE: this is # after fragment */
 184         uint64_t ifs6_reass_reqd;       /* # of incoming fragmented packets */
 185                                         /* NOTE: increment on final dst if */
 186         uint64_t ifs6_reass_ok;         /* # of reassembled packets */
 187                                         /* NOTE: this is # after reass */
 188                                         /* NOTE: increment on final dst if */
 189         uint64_t ifs6_reass_fail;       /* # of reass failures */
 190                                         /* NOTE: may not be packet count */
 191                                         /* NOTE: increment on final dst if */
 192         uint64_t ifs6_in_mcast;         /* # of inbound multicast datagrams */
 193         uint64_t ifs6_out_mcast;        /* # of outbound multicast datagrams */
 194 };
 195
 196 /*
 197  * ICMPv6 interface statistics, as defined in RFC2466 Ipv6IfIcmpEntry.
 198  * XXX: I'm not sure if this file is the right place for this structure...
 199  */
 200 struct icmp6_ifstat {
 201         /*
 202          * Input statistics
 203          */
 204         /* ipv6IfIcmpInMsgs, total # of input messages */
 205         uint64_t ifs6_in_msg;
 206         /* ipv6IfIcmpInErrors, # of input error messages */
 207         uint64_t ifs6_in_error;
 208         /* ipv6IfIcmpInDestUnreachs, # of input dest unreach errors */
 209         uint64_t ifs6_in_dstunreach;
 210         /* ipv6IfIcmpInAdminProhibs, # of input administratively prohibited errs */
 211         uint64_t ifs6_in_adminprohib;
 212         /* ipv6IfIcmpInTimeExcds, # of input time exceeded errors */
 213         uint64_t ifs6_in_timeexceed;
 214         /* ipv6IfIcmpInParmProblems, # of input parameter problem errors */
 215         uint64_t ifs6_in_paramprob;
 216         /* ipv6IfIcmpInPktTooBigs, # of input packet too big errors */
 217         uint64_t ifs6_in_pkttoobig;
 218         /* ipv6IfIcmpInEchos, # of input echo requests */
 219         uint64_t ifs6_in_echo;
 220         /* ipv6IfIcmpInEchoReplies, # of input echo replies */
 221         uint64_t ifs6_in_echoreply;
 222         /* ipv6IfIcmpInRouterSolicits, # of input router solicitations */
 223         uint64_t ifs6_in_routersolicit;
 224         /* ipv6IfIcmpInRouterAdvertisements, # of input router advertisements */
 225         uint64_t ifs6_in_routeradvert;
 226         /* ipv6IfIcmpInNeighborSolicits, # of input neighbor solicitations */
 227         uint64_t ifs6_in_neighborsolicit;
 228         /* ipv6IfIcmpInNeighborAdvertisements, # of input neighbor advertisements */
 229         uint64_t ifs6_in_neighboradvert;
 230         /* ipv6IfIcmpInRedirects, # of input redirects */
 231         uint64_t ifs6_in_redirect;
 232         /* ipv6IfIcmpInGroupMembQueries, # of input MLD queries */
 233         uint64_t ifs6_in_mldquery;
 234         /* ipv6IfIcmpInGroupMembResponses, # of input MLD reports */
 235         uint64_t ifs6_in_mldreport;
 236         /* ipv6IfIcmpInGroupMembReductions, # of input MLD done */
 237         uint64_t ifs6_in_mlddone;
 238
 239         /*
 240          * Output statistics. We should solve unresolved routing problem...
 241          */
 242         /* ipv6IfIcmpOutMsgs, total # of output messages */
 243         uint64_t ifs6_out_msg;
 244         /* ipv6IfIcmpOutErrors, # of output error messages */
 245         uint64_t ifs6_out_error;
 246         /* ipv6IfIcmpOutDestUnreachs, # of output dest unreach errors */
 247         uint64_t ifs6_out_dstunreach;
 248         /* ipv6IfIcmpOutAdminProhibs, # of output administratively prohibited errs */
 249         uint64_t ifs6_out_adminprohib;
 250         /* ipv6IfIcmpOutTimeExcds, # of output time exceeded errors */
 251         uint64_t ifs6_out_timeexceed;
 252         /* ipv6IfIcmpOutParmProblems, # of output parameter problem errors */
 253         uint64_t ifs6_out_paramprob;
 254         /* ipv6IfIcmpOutPktTooBigs, # of output packet too big errors */
 255         uint64_t ifs6_out_pkttoobig;
 256         /* ipv6IfIcmpOutEchos, # of output echo requests */
 257         uint64_t ifs6_out_echo;
 258         /* ipv6IfIcmpOutEchoReplies, # of output echo replies */
 259         uint64_t ifs6_out_echoreply;
 260         /* ipv6IfIcmpOutRouterSolicits, # of output router solicitations */
 261         uint64_t ifs6_out_routersolicit;
 262         /* ipv6IfIcmpOutRouterAdvertisements, # of output router advertisements */
 263         uint64_t ifs6_out_routeradvert;
 264         /* ipv6IfIcmpOutNeighborSolicits, # of output neighbor solicitations */
 265         uint64_t ifs6_out_neighborsolicit;
 266         /* ipv6IfIcmpOutNeighborAdvertisements, # of output neighbor advertisements */
 267         uint64_t ifs6_out_neighboradvert;
 268         /* ipv6IfIcmpOutRedirects, # of output redirects */
 269         uint64_t ifs6_out_redirect;
 270         /* ipv6IfIcmpOutGroupMembQueries, # of output MLD queries */
 271         uint64_t ifs6_out_mldquery;
 272         /* ipv6IfIcmpOutGroupMembResponses, # of output MLD reports */
 273         uint64_t ifs6_out_mldreport;
 274         /* ipv6IfIcmpOutGroupMembReductions, # of output MLD done */
 275         uint64_t ifs6_out_mlddone;
 276 };
 277
 278 struct  in6_ifreq {
 279         char    ifr_name[IFNAMSIZ];
 280         union {
 281                 struct  sockaddr_in6 ifru_addr;
 282                 struct  sockaddr_in6 ifru_dstaddr;
 283                 int     ifru_flags;
 284                 int     ifru_flags6;
 285                 int     ifru_metric;
 286                 caddr_t ifru_data;
 287                 struct in6_addrlifetime ifru_lifetime;
 288                 struct in6_ifstat ifru_stat;
 289                 struct icmp6_ifstat ifru_icmp6stat;
 290                 u_int32_t ifru_scope_id[16];
 291         } ifr_ifru;
 292 };
 293
 294 struct  in6_aliasreq {
 295         char    ifra_name[IFNAMSIZ];
 296         struct  sockaddr_in6 ifra_addr;
 297         struct  sockaddr_in6 ifra_dstaddr;
 298         struct  sockaddr_in6 ifra_prefixmask;
 299         int     ifra_flags;
 300         struct in6_addrlifetime ifra_lifetime;
 301         int     ifra_vhid;
 302 };
 303
 304 /* pre-10.x compat */
 305 struct  oin6_aliasreq {
 306         char    ifra_name[IFNAMSIZ];
 307         struct  sockaddr_in6 ifra_addr;
 308         struct  sockaddr_in6 ifra_dstaddr;
 309         struct  sockaddr_in6 ifra_prefixmask;
 310         int     ifra_flags;
 311         struct in6_addrlifetime ifra_lifetime;
 312 };
 313
 314 /* prefix type macro */
 315 #define IN6_PREFIX_ND   1
 316 #define IN6_PREFIX_RR   2
 317
 318 /*
 319  * prefix related flags passed between kernel(NDP related part) and
 320  * user land command(ifconfig) and daemon(rtadvd).
 321  */
 322 struct in6_prflags {
 323         struct prf_ra {
 324                 u_char onlink : 1;
 325                 u_char autonomous : 1;
 326                 u_char ra_derived: 1;
 327                 u_char reserved : 5;
 328         } prf_ra;
 329         u_char prf_reserved1;
 330         u_short prf_reserved2;
 331         /* want to put this on 4byte offset */
 332         struct prf_rr {
 333                 u_char decrvalid : 1;
 334                 u_char decrprefd : 1;
 335                 u_char reserved : 6;
 336         } prf_rr;
 337         u_char prf_reserved3;
 338         u_short prf_reserved4;
 339 };
 340
 341 struct  in6_prefixreq {
 342         char    ipr_name[IFNAMSIZ];
 343         u_char  ipr_origin;
 344         u_char  ipr_plen;
 345         u_int32_t ipr_vltime;
 346         u_int32_t ipr_pltime;
 347         struct in6_prflags ipr_flags;
 348         struct  sockaddr_in6 ipr_prefix;
 349 };
 350
 351 #define PR_ORIG_RA      0
 352 #define PR_ORIG_RR      1
 353 #define PR_ORIG_STATIC  2
 354 #define PR_ORIG_KERNEL  3
 355
 356 #define ipr_raf_onlink          ipr_flags.prf_ra.onlink
 357 #define ipr_raf_auto            ipr_flags.prf_ra.autonomous
 358 #define ipr_raf_ra_derived      ipr_flags.prf_ra.ra_derived
 359
 360 #define ipr_statef_onlink       ipr_flags.prf_state.onlink
 361
 362 #define ipr_rrf_decrvalid       ipr_flags.prf_rr.decrvalid
 363 #define ipr_rrf_decrprefd       ipr_flags.prf_rr.decrprefd
 364
 365 struct  in6_rrenumreq {
 366         char    irr_name[IFNAMSIZ];
 367         u_char  irr_origin;
 368         u_char  irr_m_len;      /* match len for matchprefix */
 369         u_char  irr_m_minlen;   /* minlen for matching prefix */
 370         u_char  irr_m_maxlen;   /* maxlen for matching prefix */
 371         u_char  irr_u_uselen;   /* uselen for adding prefix */
 372         u_char  irr_u_keeplen;  /* keeplen from matching prefix */
 373         struct irr_raflagmask {
 374                 u_char onlink : 1;
 375                 u_char autonomous : 1;
 376                 u_char reserved : 6;
 377         } irr_raflagmask;
 378         u_int32_t irr_vltime;
 379         u_int32_t irr_pltime;
 380         struct in6_prflags irr_flags;
 381         struct  sockaddr_in6 irr_matchprefix;
 382         struct  sockaddr_in6 irr_useprefix;
 383 };
 384
 385 #define irr_raf_mask_onlink     irr_raflagmask.onlink
 386 #define irr_raf_mask_auto       irr_raflagmask.autonomous
 387 #define irr_raf_mask_reserved   irr_raflagmask.reserved
 388
 389 #define irr_raf_onlink          irr_flags.prf_ra.onlink
 390 #define irr_raf_auto            irr_flags.prf_ra.autonomous
 391
 392 #define irr_statef_onlink       irr_flags.prf_state.onlink
 393
 394 #define irr_rrf                 irr_flags.prf_rr
 395 #define irr_rrf_decrvalid       irr_flags.prf_rr.decrvalid
 396 #define irr_rrf_decrprefd       irr_flags.prf_rr.decrprefd
 397
 398 /*
 399  * Given a pointer to an in6_ifaddr (ifaddr),
 400  * return a pointer to the addr as a sockaddr_in6
 401  */
 402 #define IA6_IN6(ia)     (&((ia)->ia_addr.sin6_addr))
 403 #define IA6_DSTIN6(ia)  (&((ia)->ia_dstaddr.sin6_addr))
 404 #define IA6_MASKIN6(ia) (&((ia)->ia_prefixmask.sin6_addr))
 405 #define IA6_SIN6(ia)    (&((ia)->ia_addr))
 406 #define IA6_DSTSIN6(ia) (&((ia)->ia_dstaddr))
 407 #define IFA_IN6(x)      (&((struct sockaddr_in6 *)((x)->ifa_addr))->sin6_addr)
 408 #define IFA_DSTIN6(x)   (&((struct sockaddr_in6 *)((x)->ifa_dstaddr))->sin6_addr)
 409 #define IFA_MASKIN6(x)  (&((struct sockaddr_in6 *)((x)->ifa_netmask))->sin6_addr)
 410
 411 #define IFPR_IN6(x)     (&((struct sockaddr_in6 *)((x)->ifpr_prefix))->sin6_addr)
 412
 413 #ifdef _KERNEL
 414 #define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m)      (       \
 415         (((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \
 416         (((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \
 417         (((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \
 418         (((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 )
 419 #define IN6_MASK_ADDR(a, m)     do { \
 420         (a)->s6_addr32[0] &= (m)->s6_addr32[0]; \
 421         (a)->s6_addr32[1] &= (m)->s6_addr32[1]; \
 422         (a)->s6_addr32[2] &= (m)->s6_addr32[2]; \
 423         (a)->s6_addr32[3] &= (m)->s6_addr32[3]; \
 424 } while (0)
 425 #endif
 426
 427 #define SIOCSIFADDR_IN6          _IOW('i', 12, struct in6_ifreq)
 428 #define SIOCGIFADDR_IN6         _IOWR('i', 33, struct in6_ifreq)
 429
 430 #ifdef _KERNEL
 431 /*
 432  * SIOCSxxx ioctls should be unused (see comments in in6.c), but
 433  * we do not shift numbers for binary compatibility.
 434  */
 435 #define SIOCSIFDSTADDR_IN6       _IOW('i', 14, struct in6_ifreq)
 436 #define SIOCSIFNETMASK_IN6       _IOW('i', 22, struct in6_ifreq)
 437 #endif
 438
 439 #define SIOCGIFDSTADDR_IN6      _IOWR('i', 34, struct in6_ifreq)
 440 #define SIOCGIFNETMASK_IN6      _IOWR('i', 37, struct in6_ifreq)
 441
 442 #define SIOCDIFADDR_IN6          _IOW('i', 25, struct in6_ifreq)
 443 #define OSIOCAIFADDR_IN6         _IOW('i', 26, struct oin6_aliasreq)
 444 #define SIOCAIFADDR_IN6          _IOW('i', 27, struct in6_aliasreq)
 445
 446 #define SIOCSIFPHYADDR_IN6       _IOW('i', 70, struct in6_aliasreq)
 447 #define SIOCGIFPSRCADDR_IN6     _IOWR('i', 71, struct in6_ifreq)
 448 #define SIOCGIFPDSTADDR_IN6     _IOWR('i', 72, struct in6_ifreq)
 449
 450 #define SIOCGIFAFLAG_IN6        _IOWR('i', 73, struct in6_ifreq)
 451
 452 #ifdef _KERNEL
 453 #define OSIOCGIFINFO_IN6        _IOWR('i', 76, struct in6_ondireq)
 454 #endif
 455 #define SIOCGIFINFO_IN6         _IOWR('i', 108, struct in6_ndireq)
 456 #define SIOCSIFINFO_IN6         _IOWR('i', 109, struct in6_ndireq)
 457 #define SIOCSNDFLUSH_IN6        _IOWR('i', 77, struct in6_ifreq)
 458 #define SIOCGNBRINFO_IN6        _IOWR('i', 78, struct in6_nbrinfo)
 459 #define SIOCSPFXFLUSH_IN6       _IOWR('i', 79, struct in6_ifreq)
 460 #define SIOCSRTRFLUSH_IN6       _IOWR('i', 80, struct in6_ifreq)
 461
 462 #define SIOCGIFALIFETIME_IN6    _IOWR('i', 81, struct in6_ifreq)
 463 #define SIOCGIFSTAT_IN6         _IOWR('i', 83, struct in6_ifreq)
 464 #define SIOCGIFSTAT_ICMP6       _IOWR('i', 84, struct in6_ifreq)
 465
 466 #define SIOCSDEFIFACE_IN6       _IOWR('i', 85, struct in6_ndifreq)
 467 #define SIOCGDEFIFACE_IN6       _IOWR('i', 86, struct in6_ndifreq)
 468
 469 #define SIOCSIFINFO_FLAGS       _IOWR('i', 87, struct in6_ndireq) /* XXX */
 470
 471 #define SIOCSSCOPE6             _IOW('i', 88, struct in6_ifreq)
 472 #define SIOCGSCOPE6             _IOWR('i', 89, struct in6_ifreq)
 473 #define SIOCGSCOPE6DEF          _IOWR('i', 90, struct in6_ifreq)
 474
 475 #define SIOCSIFPREFIX_IN6       _IOW('i', 100, struct in6_prefixreq) /* set */
 476 #define SIOCGIFPREFIX_IN6       _IOWR('i', 101, struct in6_prefixreq) /* get */
 477 #define SIOCDIFPREFIX_IN6       _IOW('i', 102, struct in6_prefixreq) /* del */
 478 #define SIOCAIFPREFIX_IN6       _IOW('i', 103, struct in6_rrenumreq) /* add */
 479 #define SIOCCIFPREFIX_IN6       _IOW('i', 104, \
 480                                      struct in6_rrenumreq) /* change */
 481 #define SIOCSGIFPREFIX_IN6      _IOW('i', 105, \
 482                                      struct in6_rrenumreq) /* set global */
 483
 484 #define SIOCGETSGCNT_IN6        _IOWR('u', 106, \
 485                                       struct sioc_sg_req6) /* get s,g pkt cnt */
 486 #define SIOCGETMIFCNT_IN6       _IOWR('u', 107, \
 487                                       struct sioc_mif_req6) /* get pkt cnt per if */
 488
 489 #define SIOCAADDRCTL_POLICY     _IOW('u', 108, struct in6_addrpolicy)
 490 #define SIOCDADDRCTL_POLICY     _IOW('u', 109, struct in6_addrpolicy)
 491
 492 #define IN6_IFF_ANYCAST         0x01    /* anycast address */
 493 #define IN6_IFF_TENTATIVE       0x02    /* tentative address */
 494 #define IN6_IFF_DUPLICATED      0x04    /* DAD detected duplicate */
 495 #define IN6_IFF_DETACHED        0x08    /* may be detached from the link */
 496 #define IN6_IFF_DEPRECATED      0x10    /* deprecated address */
 497 #define IN6_IFF_NODAD           0x20    /* don't perform DAD on this address
 498                                          * (obsolete)
 499                                          */
 500 #define IN6_IFF_AUTOCONF        0x40    /* autoconfigurable address. */
 501 #define IN6_IFF_TEMPORARY       0x80    /* temporary (anonymous) address. */
 502 #define IN6_IFF_PREFER_SOURCE   0x0100  /* preferred address for SAS */
 503
 504 /* do not input/output */
 505 #define IN6_IFF_NOTREADY (IN6_IFF_TENTATIVE|IN6_IFF_DUPLICATED)
 506
 507 #ifdef _KERNEL
 508 #define IN6_ARE_SCOPE_CMP(a,b) ((a)-(b))
 509 #define IN6_ARE_SCOPE_EQUAL(a,b) ((a)==(b))
 510 #endif
 511
 512 #ifdef _KERNEL
 513 VNET_DECLARE(struct in6_ifaddrhead, in6_ifaddrhead);
 514 VNET_DECLARE(struct in6_ifaddrlisthead *, in6_ifaddrhashtbl);
 515 VNET_DECLARE(u_long, in6_ifaddrhmask);
 516 #define V_in6_ifaddrhead                VNET(in6_ifaddrhead)
 517 #define V_in6_ifaddrhashtbl             VNET(in6_ifaddrhashtbl)
 518 #define V_in6_ifaddrhmask               VNET(in6_ifaddrhmask)
 519
 520 #define IN6ADDR_NHASH_LOG2              8
 521 #define IN6ADDR_NHASH                   (1 << IN6ADDR_NHASH_LOG2)
 522 #define IN6ADDR_HASHVAL(x)              (in6_addrhash(x))
 523 #define IN6ADDR_HASH(x) \
 524     (&V_in6_ifaddrhashtbl[IN6ADDR_HASHVAL(x) & V_in6_ifaddrhmask])
 525
 526 static __inline uint32_t
 527 in6_addrhash(const struct in6_addr *in6)
 528 {
 529         uint32_t x;
 530
 531         x = in6->s6_addr32[0] ^ in6->s6_addr32[1] ^ in6->s6_addr32[2] ^
 532             in6->s6_addr32[3];
 533         return (fnv_32_buf(&x, sizeof(x), FNV1_32_INIT));
 534 }
 535
 536 extern struct rmlock in6_ifaddr_lock;
 537 #define IN6_IFADDR_LOCK_ASSERT()        rm_assert(&in6_ifaddr_lock, RA_LOCKED)
 538 #define IN6_IFADDR_RLOCK(t)             rm_rlock(&in6_ifaddr_lock, (t))
 539 #define IN6_IFADDR_RLOCK_ASSERT()       rm_assert(&in6_ifaddr_lock, RA_RLOCKED)
 540 #define IN6_IFADDR_RUNLOCK(t)           rm_runlock(&in6_ifaddr_lock, (t))
 541 #define IN6_IFADDR_WLOCK()              rm_wlock(&in6_ifaddr_lock)
 542 #define IN6_IFADDR_WLOCK_ASSERT()       rm_assert(&in6_ifaddr_lock, RA_WLOCKED)
 543 #define IN6_IFADDR_WUNLOCK()            rm_wunlock(&in6_ifaddr_lock)
 544
 545 #define in6_ifstat_inc(ifp, tag) \
 546 do {                                                            \
 547         if (ifp)                                                \
 548                 counter_u64_add(((struct in6_ifextra *)         \
 549                     ((ifp)->if_afdata[AF_INET6]))->in6_ifstat[  \
 550                     offsetof(struct in6_ifstat, tag) / sizeof(uint64_t)], 1);\
 551 } while (/*CONSTCOND*/ 0)
 552
 553 VNET_DECLARE(unsigned long, in6_maxmtu);
 554 #define V_in6_maxmtu                    VNET(in6_maxmtu)
 555 #endif /* _KERNEL */
 556
 557 /*
 558  * IPv6 multicast MLD-layer source entry.
 559  */
 560 struct ip6_msource {
 561         RB_ENTRY(ip6_msource)   im6s_link;      /* RB tree links */
 562         struct in6_addr         im6s_addr;
 563         struct im6s_st {
 564                 uint16_t        ex;             /* # of exclusive members */
 565                 uint16_t        in;             /* # of inclusive members */
 566         }                       im6s_st[2];     /* state at t0, t1 */
 567         uint8_t                 im6s_stp;       /* pending query */
 568 };
 569 RB_HEAD(ip6_msource_tree, ip6_msource);
 570
 571 /*
 572  * IPv6 multicast PCB-layer source entry.
 573  *
 574  * NOTE: overlapping use of struct ip6_msource fields at start.
 575  */
 576 struct in6_msource {
 577         RB_ENTRY(ip6_msource)   im6s_link;      /* Common field */
 578         struct in6_addr         im6s_addr;      /* Common field */
 579         uint8_t                 im6sl_st[2];    /* state before/at commit */
 580 };
 581
 582 #ifdef _KERNEL
 583 /*
 584  * IPv6 source tree comparison function.
 585  *
 586  * An ordered predicate is necessary; bcmp() is not documented to return
 587  * an indication of order, memcmp() is, and is an ISO C99 requirement.
 588  */
 589 static __inline int
 590 ip6_msource_cmp(const struct ip6_msource *a, const struct ip6_msource *b)
 591 {
 592
 593         return (memcmp(&a->im6s_addr, &b->im6s_addr, sizeof(struct in6_addr)));
 594 }
 595 RB_PROTOTYPE(ip6_msource_tree, ip6_msource, im6s_link, ip6_msource_cmp);
 596
 597 /*
 598  * IPv6 multicast PCB-layer group filter descriptor.
 599  */
 600 struct in6_mfilter {
 601         struct ip6_msource_tree im6f_sources; /* source list for (S,G) */
 602         u_long                  im6f_nsrc;    /* # of source entries */
 603         uint8_t                 im6f_st[2];   /* state before/at commit */
 604         struct in6_multi       *im6f_in6m;    /* associated multicast address */
 605         STAILQ_ENTRY(in6_mfilter) im6f_entry; /* list entry */
 606 };
 607
 608 /*
 609  * Helper types and functions for IPv4 multicast filters.
 610  */
 611 STAILQ_HEAD(ip6_mfilter_head, in6_mfilter);
 612
 613 struct in6_mfilter *ip6_mfilter_alloc(int mflags, int st0, int st1);
 614 void ip6_mfilter_free(struct in6_mfilter *);
 615
 616 static inline void
 617 ip6_mfilter_init(struct ip6_mfilter_head *head)
 618 {
 619
 620         STAILQ_INIT(head);
 621 }
 622
 623 static inline struct in6_mfilter *
 624 ip6_mfilter_first(const struct ip6_mfilter_head *head)
 625 {
 626
 627         return (STAILQ_FIRST(head));
 628 }
 629
 630 static inline void
 631 ip6_mfilter_insert(struct ip6_mfilter_head *head, struct in6_mfilter *imf)
 632 {
 633
 634         STAILQ_INSERT_TAIL(head, imf, im6f_entry);
 635 }
 636
 637 static inline void
 638 ip6_mfilter_remove(struct ip6_mfilter_head *head, struct in6_mfilter *imf)
 639 {
 640
 641         STAILQ_REMOVE(head, imf, in6_mfilter, im6f_entry);
 642 }
 643
 644 #define IP6_MFILTER_FOREACH(imf, head) \
 645         STAILQ_FOREACH(imf, head, im6f_entry)
 646
 647 static inline size_t
 648 ip6_mfilter_count(struct ip6_mfilter_head *head)
 649 {
 650         struct in6_mfilter *imf;
 651         size_t num = 0;
 652
 653         STAILQ_FOREACH(imf, head, im6f_entry)
 654                 num++;
 655         return (num);
 656 }
 657
 658 /*
 659  * Legacy KAME IPv6 multicast membership descriptor.
 660  */
 661 struct in6_multi_mship {
 662         struct  in6_multi *i6mm_maddr;
 663         LIST_ENTRY(in6_multi_mship) i6mm_chain;
 664 };
 665
 666 /*
 667  * IPv6 group descriptor.
 668  *
 669  * For every entry on an ifnet's if_multiaddrs list which represents
 670  * an IP multicast group, there is one of these structures.
 671  *
 672  * If any source filters are present, then a node will exist in the RB-tree
 673  * to permit fast lookup by source whenever an operation takes place.
 674  * This permits pre-order traversal when we issue reports.
 675  * Source filter trees are kept separately from the socket layer to
 676  * greatly simplify locking.
 677  *
 678  * When MLDv2 is active, in6m_timer is the response to group query timer.
 679  * The state-change timer in6m_sctimer is separate; whenever state changes
 680  * for the group the state change record is generated and transmitted,
 681  * and kept if retransmissions are necessary.
 682  *
 683  * FUTURE: in6m_link is now only used when groups are being purged
 684  * on a detaching ifnet. It could be demoted to a SLIST_ENTRY, but
 685  * because it is at the very start of the struct, we can't do this
 686  * w/o breaking the ABI for ifmcstat.
 687  */
 688 struct in6_multi {
 689         struct  in6_addr in6m_addr;     /* IPv6 multicast address */
 690         struct  ifnet *in6m_ifp;        /* back pointer to ifnet */
 691         struct  ifmultiaddr *in6m_ifma; /* back pointer to ifmultiaddr */
 692         u_int   in6m_refcount;          /* reference count */
 693         u_int   in6m_state;             /* state of the membership */
 694         u_int   in6m_timer;             /* MLD6 listener report timer */
 695
 696         /* New fields for MLDv2 follow. */
 697         struct mld_ifsoftc      *in6m_mli;      /* MLD info */
 698         SLIST_ENTRY(in6_multi)   in6m_nrele;    /* to-be-released by MLD */
 699         SLIST_ENTRY(in6_multi)   in6m_defer;    /* deferred MLDv1 */
 700         struct ip6_msource_tree  in6m_srcs;     /* tree of sources */
 701         u_long                   in6m_nsrc;     /* # of tree entries */
 702
 703         struct mbufq             in6m_scq;      /* queue of pending
 704                                                  * state-change packets */
 705         struct timeval           in6m_lastgsrtv;        /* last G-S-R query */
 706         uint16_t                 in6m_sctimer;  /* state-change timer */
 707         uint16_t                 in6m_scrv;     /* state-change rexmit count */
 708
 709         /*
 710          * SSM state counters which track state at T0 (the time the last
 711          * state-change report's RV timer went to zero) and T1
 712          * (time of pending report, i.e. now).
 713          * Used for computing MLDv2 state-change reports. Several refcounts
 714          * are maintained here to optimize for common use-cases.
 715          */
 716         struct in6m_st {
 717                 uint16_t        iss_fmode;      /* MLD filter mode */
 718                 uint16_t        iss_asm;        /* # of ASM listeners */
 719                 uint16_t        iss_ex;         /* # of exclusive members */
 720                 uint16_t        iss_in;         /* # of inclusive members */
 721                 uint16_t        iss_rec;        /* # of recorded sources */
 722         }                       in6m_st[2];     /* state at t0, t1 */
 723 };
 724
 725 void in6m_disconnect_locked(struct in6_multi_head *inmh, struct in6_multi *inm);
 726
 727 /*
 728  * Helper function to derive the filter mode on a source entry
 729  * from its internal counters. Predicates are:
 730  *  A source is only excluded if all listeners exclude it.
 731  *  A source is only included if no listeners exclude it,
 732  *  and at least one listener includes it.
 733  * May be used by ifmcstat(8).
 734  */
 735 static __inline uint8_t
 736 im6s_get_mode(const struct in6_multi *inm, const struct ip6_msource *ims,
 737     uint8_t t)
 738 {
 739
 740         t = !!t;
 741         if (inm->in6m_st[t].iss_ex > 0 &&
 742             inm->in6m_st[t].iss_ex == ims->im6s_st[t].ex)
 743                 return (MCAST_EXCLUDE);
 744         else if (ims->im6s_st[t].in > 0 && ims->im6s_st[t].ex == 0)
 745                 return (MCAST_INCLUDE);
 746         return (MCAST_UNDEFINED);
 747 }
 748
 749 /*
 750  * Lock macros for IPv6 layer multicast address lists.  IPv6 lock goes
 751  * before link layer multicast locks in the lock order.  In most cases,
 752  * consumers of IN_*_MULTI() macros should acquire the locks before
 753  * calling them; users of the in_{add,del}multi() functions should not.
 754  */
 755 extern struct mtx in6_multi_list_mtx;
 756 extern struct sx in6_multi_sx;
 757
 758 #define IN6_MULTI_LIST_LOCK()           mtx_lock(&in6_multi_list_mtx)
 759 #define IN6_MULTI_LIST_UNLOCK() mtx_unlock(&in6_multi_list_mtx)
 760 #define IN6_MULTI_LIST_LOCK_ASSERT()    mtx_assert(&in6_multi_list_mtx, MA_OWNED)
 761 #define IN6_MULTI_LIST_UNLOCK_ASSERT() mtx_assert(&in6_multi_list_mtx, MA_NOTOWNED)
 762
 763 #define IN6_MULTI_LOCK()                sx_xlock(&in6_multi_sx)
 764 #define IN6_MULTI_UNLOCK()      sx_xunlock(&in6_multi_sx)
 765 #define IN6_MULTI_LOCK_ASSERT() sx_assert(&in6_multi_sx, SA_XLOCKED)
 766 #define IN6_MULTI_UNLOCK_ASSERT() sx_assert(&in6_multi_sx, SA_XUNLOCKED)
 767
 768 /*
 769  * Get the in6_multi pointer from a ifmultiaddr.
 770  * Returns NULL if ifmultiaddr is no longer valid.
 771  */
 772 static __inline struct in6_multi *
 773 in6m_ifmultiaddr_get_inm(struct ifmultiaddr *ifma)
 774 {
 775
 776         return ((ifma->ifma_addr->sa_family != AF_INET6 ||
 777             (ifma->ifma_flags & IFMA_F_ENQUEUED) == 0) ? NULL :
 778             ifma->ifma_protospec);
 779 }
 780
 781 struct in6_multi *
 782 in6m_lookup_locked(struct ifnet *ifp, const struct in6_addr *mcaddr);
 783
 784 /*
 785  * Wrapper for in6m_lookup_locked().
 786  *
 787  * SMPng: Assumes network epoch entered and that IN6_MULTI_LOCK() isn't held.
 788  */
 789 static __inline struct in6_multi *
 790 in6m_lookup(struct ifnet *ifp, const struct in6_addr *mcaddr)
 791 {
 792         struct in6_multi *inm;
 793
 794         NET_EPOCH_ASSERT();
 795
 796         IN6_MULTI_LIST_LOCK();
 797         inm = in6m_lookup_locked(ifp, mcaddr);
 798         IN6_MULTI_LIST_UNLOCK();
 799
 800         return (inm);
 801 }
 802
 803 /* Acquire an in6_multi record. */
 804 static __inline void
 805 in6m_acquire_locked(struct in6_multi *inm)
 806 {
 807
 808         IN6_MULTI_LIST_LOCK_ASSERT();
 809         ++inm->in6m_refcount;
 810 }
 811
 812 static __inline void
 813 in6m_acquire(struct in6_multi *inm)
 814 {
 815         IN6_MULTI_LIST_LOCK();
 816         in6m_acquire_locked(inm);
 817         IN6_MULTI_LIST_UNLOCK();
 818 }
 819
 820 static __inline void
 821 in6m_rele_locked(struct in6_multi_head *inmh, struct in6_multi *inm)
 822 {
 823         KASSERT(inm->in6m_refcount > 0, ("refcount == %d inm: %p", inm->in6m_refcount, inm));
 824         IN6_MULTI_LIST_LOCK_ASSERT();
 825
 826         if (--inm->in6m_refcount == 0) {
 827                 MPASS(inm->in6m_ifp == NULL);
 828                 inm->in6m_ifma->ifma_protospec = NULL;
 829                 MPASS(inm->in6m_ifma->ifma_llifma == NULL);
 830                 SLIST_INSERT_HEAD(inmh, inm, in6m_nrele);
 831         }
 832 }
 833
 834 struct ip6_moptions;
 835 struct sockopt;
 836 struct inpcbinfo;
 837 struct rib_head;
 838 struct ucred;
 839
 840 /* Multicast KPIs. */
 841 int     im6o_mc_filter(const struct ip6_moptions *, const struct ifnet *,
 842             const struct sockaddr *, const struct sockaddr *);
 843 int in6_joingroup(struct ifnet *, const struct in6_addr *,
 844             struct in6_mfilter *, struct in6_multi **, int);
 845 int     in6_leavegroup(struct in6_multi *, struct in6_mfilter *);
 846 int     in6_leavegroup_locked(struct in6_multi *, struct in6_mfilter *);
 847 void    in6m_clear_recorded(struct in6_multi *);
 848 void    in6m_commit(struct in6_multi *);
 849 void    in6m_print(const struct in6_multi *);
 850 int     in6m_record_source(struct in6_multi *, const struct in6_addr *);
 851 void    in6m_release_list_deferred(struct in6_multi_head *);
 852 void    in6m_release_wait(void *);
 853 void    ip6_freemoptions(struct ip6_moptions *);
 854 int     ip6_getmoptions(struct inpcb *, struct sockopt *);
 855 int     ip6_setmoptions(struct inpcb *, struct sockopt *);
 856
 857 /* flags to in6_update_ifa */
 858 #define IN6_IFAUPDATE_DADDELAY  0x1 /* first time to configure an address */
 859
 860 int     in6_mask2len(struct in6_addr *, u_char *);
 861 int     in6_control(struct socket *, u_long, void *, struct ifnet *,
 862         struct thread *);
 863 int     in6_control_ioctl(u_long, void *, struct ifnet *, struct ucred *);
 864 int     in6_update_ifa(struct ifnet *, struct in6_aliasreq *,
 865         struct in6_ifaddr *, int);
 866 void    in6_prepare_ifra(struct in6_aliasreq *, const struct in6_addr *,
 867         const struct in6_addr *);
 868 int     in6_addifaddr(struct ifnet *, struct in6_aliasreq *, struct in6_ifaddr *);
 869 void    in6_purgeaddr(struct ifaddr *);
 870 void    in6_purgeifaddr(struct in6_ifaddr *);
 871 int     in6if_do_dad(struct ifnet *);
 872 void    in6_savemkludge(struct in6_ifaddr *);
 873 void    *in6_domifattach(struct ifnet *);
 874 void    in6_domifdetach(struct ifnet *, void *);
 875 int     in6_domifmtu(struct ifnet *);
 876 struct rib_head *in6_inithead(uint32_t fibnum);
 877 void    in6_detachhead(struct rib_head *rh);
 878 void    in6_setmaxmtu(void);
 879 int     in6_if2idlen(struct ifnet *);
 880 struct in6_ifaddr *in6ifa_ifpforlinklocal(struct ifnet *, int);
 881 struct in6_ifaddr *in6ifa_ifpwithaddr(struct ifnet *, const struct in6_addr *);
 882 struct in6_ifaddr *in6ifa_ifwithaddr(const struct in6_addr *, uint32_t, bool);
 883 struct in6_ifaddr *in6ifa_llaonifp(struct ifnet *);
 884 int     in6_addr2zoneid(struct ifnet *, struct in6_addr *, u_int32_t *);
 885 int     in6_matchlen(struct in6_addr *, struct in6_addr *);
 886 int     in6_are_prefix_equal(struct in6_addr *, struct in6_addr *, int);
 887 void    in6_prefixlen2mask(struct in6_addr *, int);
 888 int     in6_prefix_ioctl(struct socket *, u_long, caddr_t,
 889         struct ifnet *);
 890 int     in6_prefix_add_ifid(int, struct in6_ifaddr *);
 891 void    in6_prefix_remove_ifid(int, struct in6_ifaddr *);
 892 void    in6_purgeprefix(struct ifnet *);
 893
 894 int     in6_is_addr_deprecated(struct sockaddr_in6 *);
 895 int     in6_src_ioctl(u_long, caddr_t);
 896
 897 void    in6_newaddrmsg(struct in6_ifaddr *, int);
 898
 899 void    in6_purge_proxy_ndp(struct ifnet *);
 900 /*
 901  * Extended API for IPv6 FIB support.
 902  */
 903 struct mbuf *ip6_tryforward(struct mbuf *);
 904 #endif /* _KERNEL */
 905
 906 #endif /* _NETINET6_IN6_VAR_H_ */