bsd/netinet6/ip6_var.h

   1 /*
   2  * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*      $FreeBSD: src/sys/netinet6/ip6_var.h,v 1.2.2.2 2001/07/03 11:01:54 ume Exp $    */
  30 /*      $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $        */
  31
  32 /*
  33  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
  34  * 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  * 3. Neither the name of the project 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 PROJECT 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 PROJECT 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
  61 /*
  62  * Copyright (c) 1982, 1986, 1993
  63  *      The Regents of the University of California.  All rights reserved.
  64  *
  65  * Redistribution and use in source and binary forms, with or without
  66  * modification, are permitted provided that the following conditions
  67  * are met:
  68  * 1. Redistributions of source code must retain the above copyright
  69  *    notice, this list of conditions and the following disclaimer.
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in the
  72  *    documentation and/or other materials provided with the distribution.
  73  * 3. All advertising materials mentioning features or use of this software
  74  *    must display the following acknowledgement:
  75  *      This product includes software developed by the University of
  76  *      California, Berkeley and its contributors.
  77  * 4. Neither the name of the University nor the names of its contributors
  78  *    may be used to endorse or promote products derived from this software
  79  *    without specific prior written permission.
  80  *
  81  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  82  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  83  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  84  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  85  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  86  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  87  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  88  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  89  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  90  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  91  * SUCH DAMAGE.
  92  *
  93  *      @(#)ip_var.h    8.1 (Berkeley) 6/10/93
  94  */
  95
  96 #ifndef _NETINET6_IP6_VAR_H_
  97 #define _NETINET6_IP6_VAR_H_
  98 #include <sys/appleapiopts.h>
  99
 100 #ifdef XNU_KERNEL_PRIVATE
 101 /*
 102  * IP6 reassembly queue structure.  Each fragment
 103  * being reassembled is attached to one of these structures.
 104  */
 105 struct  ip6q {
 106         struct ip6asfrag *ip6q_down;
 107         struct ip6asfrag *ip6q_up;
 108         u_int32_t       ip6q_ident;
 109         u_int8_t        ip6q_nxt;
 110         u_int8_t        ip6q_ecn;
 111         u_int8_t        ip6q_ttl;
 112         struct in6_addr ip6q_src, ip6q_dst;
 113         struct ip6q     *ip6q_next;
 114         struct ip6q     *ip6q_prev;
 115         int             ip6q_unfrglen;  /* len of unfragmentable part */
 116 #if notyet
 117         u_char  *ip6q_nxtp;
 118 #endif
 119         int             ip6q_nfrag;     /* # of fragments */
 120 };
 121
 122 struct  ip6asfrag {
 123         struct ip6asfrag *ip6af_down;
 124         struct ip6asfrag *ip6af_up;
 125         struct mbuf     *ip6af_m;
 126         int             ip6af_offset;   /* offset in ip6af_m to next header */
 127         int             ip6af_frglen;   /* fragmentable part length */
 128         int             ip6af_off;      /* fragment offset */
 129         u_int16_t       ip6af_mff;      /* more fragment bit in frag off */
 130 };
 131
 132 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
 133
 134 struct  ip6_moptions {
 135         decl_lck_mtx_data(, im6o_lock);
 136         uint32_t im6o_refcnt;           /* ref count */
 137         uint32_t im6o_debug;            /* see ifa_debug flags */
 138         struct  ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
 139         u_char  im6o_multicast_hlim;    /* hoplimit for outgoing multicasts */
 140         u_char  im6o_multicast_loop;    /* 1 >= hear sends if a member */
 141         u_short im6o_num_memberships;   /* no. memberships this socket */
 142         u_short im6o_max_memberships;   /* max memberships this socket */
 143         struct  in6_multi **im6o_membership;    /* group memberships */
 144         struct  in6_mfilter *im6o_mfilters;     /* source filters */
 145         void (*im6o_trace)              /* callback fn for tracing refs */
 146             (struct ip6_moptions *, int);
 147 };
 148
 149 #define IM6O_LOCK_ASSERT_HELD(_im6o)                                    \
 150         lck_mtx_assert(&(_im6o)->im6o_lock, LCK_MTX_ASSERT_OWNED)
 151
 152 #define IM6O_LOCK_ASSERT_NOTHELD(_im6o)                                 \
 153         lck_mtx_assert(&(_im6o)->im6o_lock, LCK_MTX_ASSERT_NOTOWNED)
 154
 155 #define IM6O_LOCK(_im6o)                                                \
 156         lck_mtx_lock(&(_im6o)->im6o_lock)
 157
 158 #define IM6O_LOCK_SPIN(_im6o)                                           \
 159         lck_mtx_lock_spin(&(_im6o)->im6o_lock)
 160
 161 #define IM6O_CONVERT_LOCK(_im6o) do {                                   \
 162         IM6O_LOCK_ASSERT_HELD(_im6o);                                   \
 163         lck_mtx_convert_spin(&(_im6o)->im6o_lock);                      \
 164 } while (0)
 165
 166 #define IM6O_UNLOCK(_im6o)                                              \
 167         lck_mtx_unlock(&(_im6o)->im6o_lock)
 168
 169 #define IM6O_ADDREF(_im6o)                                              \
 170         im6o_addref(_im6o, 0)
 171
 172 #define IM6O_ADDREF_LOCKED(_im6o)                                       \
 173         im6o_addref(_im6o, 1)
 174
 175 #define IM6O_REMREF(_im6o)                                              \
 176         im6o_remref(_im6o)
 177
 178 struct ip6_exthdrs {
 179         struct mbuf *ip6e_ip6;
 180         struct mbuf *ip6e_hbh;
 181         struct mbuf *ip6e_dest1;
 182         struct mbuf *ip6e_rthdr;
 183         struct mbuf *ip6e_dest2;
 184 };
 185
 186 /*
 187  * Control options for outgoing packets
 188  */
 189
 190 /* Routing header related info */
 191 struct  ip6po_rhinfo {
 192         struct  ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
 193         struct  route_in6 ip6po_rhi_route; /* Route to the 1st hop */
 194 };
 195 #define ip6po_rthdr     ip6po_rhinfo.ip6po_rhi_rthdr
 196 #define ip6po_route     ip6po_rhinfo.ip6po_rhi_route
 197
 198 /* Nexthop related info */
 199 struct  ip6po_nhinfo {
 200         struct  sockaddr *ip6po_nhi_nexthop;
 201         struct  route_in6 ip6po_nhi_route; /* Route to the nexthop */
 202 };
 203 #define ip6po_nexthop   ip6po_nhinfo.ip6po_nhi_nexthop
 204 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
 205
 206 struct  ip6_pktopts {
 207         struct  mbuf *ip6po_m;  /* Pointer to mbuf storing the data */
 208         int     ip6po_hlim;     /* Hoplimit for outgoing packets */
 209
 210         /* Outgoing IF/address information */
 211         struct  in6_pktinfo *ip6po_pktinfo;
 212
 213         /* Next-hop address information */
 214         struct  ip6po_nhinfo ip6po_nhinfo;
 215
 216         struct  ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
 217
 218         /* Destination options header (before a routing header) */
 219         struct  ip6_dest *ip6po_dest1;
 220
 221         /* Routing header related info. */
 222         struct  ip6po_rhinfo ip6po_rhinfo;
 223
 224         /* Destination options header (after a routing header) */
 225         struct  ip6_dest *ip6po_dest2;
 226
 227         int     ip6po_tclass;   /* traffic class */
 228
 229         int     ip6po_minmtu;  /* fragment vs PMTU discovery policy */
 230 #define IP6PO_MINMTU_MCASTONLY  -1 /* default; send at min MTU for multicast*/
 231 #define IP6PO_MINMTU_DISABLE     0 /* always perform pmtu disc */
 232 #define IP6PO_MINMTU_ALL         1 /* always send at min MTU */
 233
 234         int     ip6po_prefer_tempaddr;  /* whether temporary addresses are
 235                                            preferred as source address */
 236 #define IP6PO_TEMPADDR_SYSTEM   -1 /* follow the system default */
 237 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
 238 #define IP6PO_TEMPADDR_PREFER    1 /* prefer temporary address */
 239
 240         int ip6po_flags;
 241 #if 0   /* parameters in this block is obsolete. do not reuse the values. */
 242 #define IP6PO_REACHCONF 0x01    /* upper-layer reachability confirmation. */
 243 #define IP6PO_MINMTU    0x02    /* use minimum MTU (IPV6_USE_MIN_MTU) */
 244 #endif
 245 #define IP6PO_DONTFRAG  0x04    /* disable fragmentation (IPV6_DONTFRAG) */
 246 #define IP6PO_USECOA    0x08    /* use care of address */
 247 };
 248
 249 /*
 250  * Control options for incoming packets
 251  */
 252 #endif /* XNU_KERNEL_PRIVATE */
 253
 254 struct  ip6stat {
 255         u_quad_t ip6s_total;            /* total packets received */
 256         u_quad_t ip6s_tooshort;         /* packet too short */
 257         u_quad_t ip6s_toosmall;         /* not enough data */
 258         u_quad_t ip6s_fragments;        /* fragments received */
 259         u_quad_t ip6s_fragdropped;      /* frags dropped(dups, out of space) */
 260         u_quad_t ip6s_fragtimeout;      /* fragments timed out */
 261         u_quad_t ip6s_fragoverflow;     /* fragments that exceeded limit */
 262         u_quad_t ip6s_forward;          /* packets forwarded */
 263         u_quad_t ip6s_cantforward;      /* packets rcvd for unreachable dest */
 264         u_quad_t ip6s_redirectsent;     /* packets forwarded on same net */
 265         u_quad_t ip6s_delivered;        /* datagrams delivered to upper level*/
 266         u_quad_t ip6s_localout;         /* total ip packets generated here */
 267         u_quad_t ip6s_odropped;         /* lost packets due to nobufs, etc. */
 268         u_quad_t ip6s_reassembled;      /* total packets reassembled ok */
 269         u_quad_t ip6s_fragmented;       /* datagrams successfully fragmented */
 270         u_quad_t ip6s_ofragments;       /* output fragments created */
 271         u_quad_t ip6s_cantfrag;         /* don't fragment flag was set, etc. */
 272         u_quad_t ip6s_badoptions;       /* error in option processing */
 273         u_quad_t ip6s_noroute;          /* packets discarded due to no route */
 274         u_quad_t ip6s_badvers;          /* ip6 version != 6 */
 275         u_quad_t ip6s_rawout;           /* total raw ip packets generated */
 276         u_quad_t ip6s_badscope;         /* scope error */
 277         u_quad_t ip6s_notmember;        /* don't join this multicast group */
 278         u_quad_t ip6s_nxthist[256];     /* next header history */
 279         u_quad_t ip6s_m1;               /* one mbuf */
 280         u_quad_t ip6s_m2m[32];          /* two or more mbuf */
 281         u_quad_t ip6s_mext1;            /* one ext mbuf */
 282         u_quad_t ip6s_mext2m;           /* two or more ext mbuf */
 283         u_quad_t ip6s_exthdrtoolong;    /* ext hdr are not continuous */
 284         u_quad_t ip6s_nogif;            /* no match gif found */
 285         u_quad_t ip6s_toomanyhdr;       /* discarded due to too many headers */
 286
 287         /*
 288          * statistics for improvement of the source address selection
 289          * algorithm:
 290          * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
 291          */
 292         /* number of times that address selection fails */
 293         u_quad_t ip6s_sources_none;
 294         /* number of times that an address on the outgoing I/F is chosen */
 295         u_quad_t ip6s_sources_sameif[16];
 296         /* number of times that an address on a non-outgoing I/F is chosen */
 297         u_quad_t ip6s_sources_otherif[16];
 298         /*
 299          * number of times that an address that has the same scope
 300          * from the destination is chosen.
 301          */
 302         u_quad_t ip6s_sources_samescope[16];
 303         /*
 304          * number of times that an address that has a different scope
 305          * from the destination is chosen.
 306          */
 307         u_quad_t ip6s_sources_otherscope[16];
 308         /* number of times that a deprecated address is chosen */
 309         u_quad_t ip6s_sources_deprecated[16];
 310
 311         u_quad_t ip6s_forward_cachehit;
 312         u_quad_t ip6s_forward_cachemiss;
 313
 314         /* number of times that each rule of source selection is applied. */
 315         u_quad_t ip6s_sources_rule[16];
 316 #ifdef PRIVATE
 317         u_quad_t ip6s_pktdropcntrl;     /* pkt dropped, no mbufs for control data */
 318 #endif /* PRIVATE */
 319 };
 320
 321 #ifdef KERNEL_PRIVATE
 322 #ifdef KERNEL
 323 /*
 324  * IPv6 onion peeling state.
 325  * it will be initialized when we come into ip6_input().
 326  * XXX do not make it a kitchen sink!
 327  */
 328 struct ip6aux {
 329         u_int32_t ip6a_flags;
 330 #define IP6A_SWAP       0x01            /* swapped home/care-of on packet */
 331 #define IP6A_HASEEN     0x02            /* HA was present */
 332 #define IP6A_BRUID      0x04            /* BR Unique Identifier was present */
 333 #define IP6A_RTALERTSEEN 0x08           /* rtalert present */
 334
 335         /* ip6.ip6_src */
 336         struct in6_addr ip6a_careof;    /* care-of address of the peer */
 337         struct in6_addr ip6a_home;      /* home address of the peer */
 338         u_int16_t       ip6a_bruid;     /* BR unique identifier */
 339
 340         /* ip6.ip6_dst */
 341         struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
 342
 343         /* rtalert */
 344         u_int16_t ip6a_rtalert;         /* rtalert option value */
 345
 346         /*
 347          * decapsulation history will be here.
 348          * with IPsec it may not be accurate.
 349          */
 350 };
 351
 352 /* flags passed to ip6_output as last parameter */
 353 #define IPV6_UNSPECSRC          0x01    /* allow :: as the source address */
 354 #define IPV6_FORWARDING         0x02    /* most of IPv6 header exists */
 355 #define IPV6_MINMTU             0x04    /* use minimum MTU (IPV6_USE_MIN_MTU) */
 356 #define IPV6_FLAG_NOSRCIFSEL    0x80    /* bypas source address selection */
 357 #define IPV6_OUTARGS            0x100   /* has ancillary output info */
 358
 359 #ifdef XNU_KERNEL_PRIVATE
 360 #define IP6_HDR_ALIGNED_P(_ip6) ((((uintptr_t)(_ip6)) & ((uintptr_t)3)) == 0)
 361
 362 /*
 363  * On platforms which require strict alignment (currently for anything but
 364  * i386 or x86_64), this macro checks whether the pointer to the IP header
 365  * is 32-bit aligned, and assert otherwise.
 366  */
 367 #if defined(__i386__) || defined(__x86_64__)
 368 #define IP6_HDR_STRICT_ALIGNMENT_CHECK(_ip6) do { } while (0)
 369 #else /* !__i386__ && !__x86_64__ */
 370 #define IP6_HDR_STRICT_ALIGNMENT_CHECK(_ip6) do {                       \
 371         if (!IP_HDR_ALIGNED_P(_ip6)) {                                  \
 372                 panic_plain("\n%s: Unaligned IPv6 header %p\n",         \
 373                     __func__, _ip6);                                    \
 374         }                                                               \
 375 } while (0)
 376 #endif /* !__i386__ && !__x86_64__ */
 377 #endif /* XNU_KERNEL_PRIVATE */
 378
 379 #include <net/flowadv.h>
 380
 381 /*
 382  * Extra information passed to ip6_output when IPV6_OUTARGS is set.
 383  */
 384 struct ip6_out_args {
 385         unsigned int    ip6oa_boundif;  /* bound outgoing interface */
 386         struct flowadv  ip6oa_flowadv;  /* flow advisory code */
 387         u_int32_t       ip6oa_flags;    /* IP6OAF flags (see below) */
 388 #define IP6OAF_SELECT_SRCIF     0x00000001      /* src interface selection */
 389 #define IP6OAF_BOUND_IF         0x00000002      /* boundif value is valid */
 390 #define IP6OAF_BOUND_SRCADDR    0x00000004      /* bound to src address */
 391 #define IP6OAF_NO_CELLULAR      0x00000010      /* skip IFT_CELLULAR */
 392 };
 393
 394 extern struct   ip6stat ip6stat;        /* statistics */
 395 extern u_int32_t ip6_id;                /* fragment identifier */
 396 extern int      ip6_defhlim;            /* default hop limit */
 397 extern int      ip6_defmcasthlim;       /* default multicast hop limit */
 398 extern int      ip6_forwarding;         /* act as router? */
 399 extern int      ip6_forward_srcrt;      /* forward src-routed? */
 400 extern int      ip6_gif_hlim;           /* Hop limit for gif encap packet */
 401 extern int      ip6_use_deprecated;     /* allow deprecated addr as source */
 402 extern int      ip6_rr_prune;           /* router renumbering prefix
 403                                          * walk list every 5 sec.    */
 404 extern int      ip6_mcast_pmtu;         /* enable pMTU discovery for multicast? */
 405 #define ip6_mapped_addr_on      (!ip6_v6only)
 406 extern int      ip6_v6only;
 407
 408 extern int      ip6_neighborgcthresh;   /* Threshold # of NDP entries for GC */
 409 extern int      ip6_maxifprefixes;      /* Max acceptable prefixes via RA per IF */
 410 extern int      ip6_maxifdefrouters;    /* Max acceptable def routers via RA */
 411 extern int      ip6_maxdynroutes;       /* Max # of routes created via redirect */
 412 #if MROUTING
 413 extern struct socket *ip6_mrouter;      /* multicast routing daemon */
 414 #endif
 415 extern int      ip6_sendredirects;      /* send IP redirects when forwarding? */
 416 extern int      ip6_maxfragpackets; /* Maximum packets in reassembly queue */
 417 extern int      ip6_maxfrags;   /* Maximum fragments in reassembly queue */
 418 extern int      ip6_sourcecheck;        /* Verify source interface */
 419 extern int      ip6_sourcecheck_interval; /* Interval between log messages */
 420 extern int      ip6_accept_rtadv;       /* deprecated */
 421 extern int      ip6_log_interval;
 422 extern time_t   ip6_log_time;
 423 extern int      ip6_hdrnestlimit; /* upper limit of # of extension headers */
 424 extern int      ip6_dad_count;          /* DupAddrDetectionTransmits */
 425 extern int      ip6_only_allow_rfc4193_prefix;  /* RFC4193 Unique Local Unicast Prefixes only */
 426
 427 extern u_int32_t ip6_flow_seq;
 428 extern int ip6_auto_flowlabel;
 429 extern int ip6_auto_linklocal;
 430
 431 extern int   ip6_anonportmin;           /* minimum ephemeral port */
 432 extern int   ip6_anonportmax;           /* maximum ephemeral port */
 433 extern int   ip6_lowportmin;            /* minimum reserved port */
 434 extern int   ip6_lowportmax;            /* maximum reserved port */
 435
 436 extern int      ip6_use_tempaddr; /* whether to use temporary addresses. */
 437 extern int      ip6_prefer_tempaddr; /* whether to prefer temporary addresses
 438                                         in the source address selection */
 439 extern int      ip6_use_defzone; /* whether to use the default scope zone
 440                                     when unspecified */
 441
 442 extern struct   pr_usrreqs rip6_usrreqs;
 443 extern struct   pr_usrreqs icmp6_dgram_usrreqs;
 444
 445 extern int      ip6_doscopedroute;
 446 extern int      ip6_restrictrecvif;
 447
 448 struct sockopt;
 449
 450 struct inpcb;
 451
 452 int     icmp6_ctloutput(struct socket *, struct sockopt *);
 453 int     icmp6_dgram_ctloutput(struct socket *, struct sockopt *);
 454 int     icmp6_dgram_send(struct socket *, int , struct mbuf *, struct sockaddr *, struct mbuf *, struct proc *);
 455 int     icmp6_dgram_attach(struct socket *, int , struct proc *);
 456
 457
 458 struct in6_ifaddr;
 459 void    ip6_init(void);
 460 void    ip6_input(struct mbuf *);
 461 struct in6_ifaddr *ip6_getdstifaddr(struct mbuf *);
 462 void    ip6_freepcbopts(struct ip6_pktopts *);
 463 int     ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
 464 char *  ip6_get_prevhdr(struct mbuf *, int);
 465 int     ip6_nexthdr(struct mbuf *, int, int, int *);
 466 int     ip6_lasthdr(struct mbuf *, int, int, int *);
 467
 468 extern void ip6_moptions_init(void);
 469 extern struct ip6_moptions *ip6_allocmoptions(int);
 470 extern void im6o_addref(struct ip6_moptions *, int);
 471 extern void im6o_remref(struct ip6_moptions *);
 472
 473 struct ip6aux *ip6_addaux(struct mbuf *);
 474 struct ip6aux *ip6_findaux(struct mbuf *);
 475 void    ip6_delaux(struct mbuf *);
 476 extern void ip6_destroyaux(struct ip6aux *);
 477 extern void ip6_copyaux(struct ip6aux *, struct ip6aux *);
 478
 479 int     ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
 480 int     ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
 481                                  u_int32_t *);
 482 struct mbuf     **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
 483             struct mbuf **, int *);
 484 int     ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
 485 struct mbuf *ip6_forward(struct mbuf *, struct route_in6 *, int);
 486 void    ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
 487                              u_int32_t *));
 488 void    ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
 489 int     ip6_output(struct mbuf *, struct ip6_pktopts *, struct route_in6 *,
 490             int, struct ip6_moptions *, struct ifnet **, struct ip6_out_args *);
 491 int     ip6_output_list(struct mbuf *, int, struct ip6_pktopts *,
 492             struct route_in6 *, int, struct ip6_moptions *, struct ifnet **,
 493             struct ip6_out_args *);
 494 int     ip6_ctloutput(struct socket *, struct sockopt *sopt);
 495 void    ip6_initpktopts(struct ip6_pktopts *);
 496 int     ip6_setpktoptions(struct mbuf *, struct ip6_pktopts *, int, int);
 497 void    ip6_clearpktopts(struct ip6_pktopts *, int);
 498 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
 499 int     ip6_optlen(struct inpcb *);
 500
 501 int     route6_input(struct mbuf **, int *, int);
 502
 503 void    frag6_init(void);
 504 int     frag6_input(struct mbuf **, int *, int);
 505 void    frag6_slowtimo(void);
 506 void    frag6_drain(void);
 507
 508 int     rip6_input(struct mbuf **, int *, int);
 509 void    rip6_ctlinput(int, struct sockaddr *, void *);
 510 int     rip6_ctloutput(struct socket *so, struct sockopt *sopt);
 511 int     rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *, struct mbuf *, int);
 512
 513 int     dest6_input(struct mbuf **, int *, int);
 514 extern struct in6_addr *in6_selectsrc(struct sockaddr_in6 *,
 515             struct ip6_pktopts *, struct inpcb *, struct route_in6 *,
 516             struct ifnet **, struct in6_addr *, unsigned int, int *);
 517 extern struct in6_addrpolicy *
 518         in6_addrsel_lookup_policy(struct sockaddr_in6 *);
 519 int in6_selectroute(struct sockaddr_in6 *, struct sockaddr_in6 *,
 520         struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *,
 521         struct ifnet **, struct rtentry **, int, const struct ip6_out_args *);
 522 int ip6_setpktopts(struct mbuf *control, struct ip6_pktopts *opt, struct ip6_pktopts *stickyopt, int uproto);
 523 u_int32_t ip6_randomid(void);
 524 u_int32_t ip6_randomflowlabel(void);
 525
 526 #endif /* KERNEL */
 527 #endif /* KERNEL_PRIVATE */
 528
 529 #endif /* !_NETINET6_IP6_VAR_H_ */