sys/netinet6/ip6_var.h

   1 /*      $FreeBSD: src/sys/netinet6/ip6_var.h,v 1.2.2.4 2003/01/23 21:06:47 sam Exp $    */
   2 /*      $DragonFly: src/sys/netinet6/ip6_var.h,v 1.12 2007/05/07 12:40:30 hasso Exp $   */
   3 /*      $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $        */
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * Copyright (c) 1982, 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. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by the University of
  49  *      California, Berkeley and its contributors.
  50  * 4. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  *
  66  *      @(#)ip_var.h    8.1 (Berkeley) 6/10/93
  67  */
  68
  69 #ifndef _NETINET6_IP6_VAR_H_
  70 #define _NETINET6_IP6_VAR_H_
  71
  72 #ifndef _SYS_TYPES_H_
  73 #include <sys/types.h>
  74 #endif
  75 #ifndef _SYS_QUEUE_H_
  76 #include <sys/queue.h>
  77 #endif
  78 #ifndef _NETINET_IN_H_
  79 #include <netinet/in.h>
  80 #endif
  81
  82 /*
  83  * IP6 reassembly queue structure.  Each fragment
  84  * being reassembled is attached to one of these structures.
  85  */
  86 struct  ip6q {
  87         u_int32_t       ip6q_head;
  88         u_int16_t       ip6q_len;
  89         u_int8_t        ip6q_nxt;       /* ip6f_nxt in first fragment */
  90         u_int8_t        ip6q_hlim;
  91         struct ip6asfrag *ip6q_down;
  92         struct ip6asfrag *ip6q_up;
  93         u_int32_t       ip6q_ident;
  94         u_int8_t        ip6q_arrive;
  95         u_int8_t        ip6q_ttl;
  96         struct in6_addr ip6q_src, ip6q_dst;
  97         struct ip6q     *ip6q_next;
  98         struct ip6q     *ip6q_prev;
  99         int             ip6q_unfrglen;  /* len of unfragmentable part */
 100 #ifdef notyet
 101         u_char          *ip6q_nxtp;
 102 #endif
 103 };
 104
 105 struct  ip6asfrag {
 106         u_int32_t       ip6af_head;
 107         u_int16_t       ip6af_len;
 108         u_int8_t        ip6af_nxt;
 109         u_int8_t        ip6af_hlim;
 110         /* must not override the above members during reassembling */
 111         struct ip6asfrag *ip6af_down;
 112         struct ip6asfrag *ip6af_up;
 113         struct mbuf     *ip6af_m;
 114         int             ip6af_offset;   /* offset in ip6af_m to next header */
 115         int             ip6af_frglen;   /* fragmentable part length */
 116         int             ip6af_off;      /* fragment offset */
 117         u_int16_t       ip6af_mff;      /* more fragment bit in frag off */
 118 };
 119
 120 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
 121
 122 struct  ip6_moptions {
 123         struct  ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
 124         u_char  im6o_multicast_hlim;    /* hoplimit for outgoing multicasts */
 125         u_char  im6o_multicast_loop;    /* 1 >= hear sends if a member */
 126         LIST_HEAD(, in6_multi_mship) im6o_memberships;
 127 };
 128
 129 /*
 130  * Control options for outgoing packets
 131  */
 132
 133 /* Routing header related info */
 134 struct  ip6po_rhinfo {
 135         struct  ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
 136         struct  route_in6 ip6po_rhi_route; /* Route to the 1st hop */
 137 };
 138 #define ip6po_rthdr     ip6po_rhinfo.ip6po_rhi_rthdr
 139 #define ip6po_route     ip6po_rhinfo.ip6po_rhi_route
 140
 141 struct  ip6_pktopts {
 142         struct  mbuf *ip6po_m;  /* Pointer to mbuf storing the data */
 143         int     ip6po_hlim;     /* Hoplimit for outgoing packets */
 144
 145         /* Outgoing IF/address information */
 146         struct  in6_pktinfo *ip6po_pktinfo;
 147
 148         struct  sockaddr *ip6po_nexthop; /* Next-hop address */
 149
 150         struct  ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
 151
 152         /* Destination options header (before a routing header) */
 153         struct  ip6_dest *ip6po_dest1;
 154
 155         /* Routing header related info. */
 156         struct  ip6po_rhinfo ip6po_rhinfo;
 157
 158         /* Destination options header (after a routing header) */
 159         struct  ip6_dest *ip6po_dest2;
 160 };
 161
 162 /*
 163  * Control options for incoming packets
 164  */
 165
 166 struct  ip6stat {
 167         u_quad_t ip6s_total;            /* total packets received */
 168         u_quad_t ip6s_tooshort;         /* packet too short */
 169         u_quad_t ip6s_toosmall;         /* not enough data */
 170         u_quad_t ip6s_fragments;        /* fragments received */
 171         u_quad_t ip6s_fragdropped;      /* frags dropped(dups, out of space) */
 172         u_quad_t ip6s_fragtimeout;      /* fragments timed out */
 173         u_quad_t ip6s_fragoverflow;     /* fragments that exceeded limit */
 174         u_quad_t ip6s_forward;          /* packets forwarded */
 175         u_quad_t ip6s_cantforward;      /* packets rcvd for unreachable dest */
 176         u_quad_t ip6s_redirectsent;     /* packets forwarded on same net */
 177         u_quad_t ip6s_delivered;        /* datagrams delivered to upper level*/
 178         u_quad_t ip6s_localout;         /* total ip packets generated here */
 179         u_quad_t ip6s_odropped;         /* lost packets due to nobufs, etc. */
 180         u_quad_t ip6s_reassembled;      /* total packets reassembled ok */
 181         u_quad_t ip6s_fragmented;       /* datagrams successfully fragmented */
 182         u_quad_t ip6s_ofragments;       /* output fragments created */
 183         u_quad_t ip6s_cantfrag;         /* don't fragment flag was set, etc. */
 184         u_quad_t ip6s_badoptions;       /* error in option processing */
 185         u_quad_t ip6s_noroute;          /* packets discarded due to no route */
 186         u_quad_t ip6s_badvers;          /* ip6 version != 6 */
 187         u_quad_t ip6s_rawout;           /* total raw ip packets generated */
 188         u_quad_t ip6s_badscope;         /* scope error */
 189         u_quad_t ip6s_notmember;        /* don't join this multicast group */
 190         u_quad_t ip6s_nxthist[256];     /* next header history */
 191         u_quad_t ip6s_m1;               /* one mbuf */
 192         u_quad_t ip6s_m2m[32];          /* two or more mbuf */
 193         u_quad_t ip6s_mext1;            /* one ext mbuf */
 194         u_quad_t ip6s_mext2m;           /* two or more ext mbuf */
 195         u_quad_t ip6s_exthdrtoolong;    /* ext hdr are not continuous */
 196         u_quad_t ip6s_nogif;            /* no match gif found */
 197         u_quad_t ip6s_toomanyhdr;       /* discarded due to too many headers */
 198
 199         /*
 200          * statistics for improvement of the source address selection
 201          * algorithm:
 202          * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
 203          */
 204         /* number of times that address selection fails */
 205         u_quad_t ip6s_sources_none;
 206         /* number of times that an address on the outgoing I/F is chosen */
 207         u_quad_t ip6s_sources_sameif[16];
 208         /* number of times that an address on a non-outgoing I/F is chosen */
 209         u_quad_t ip6s_sources_otherif[16];
 210         /*
 211          * number of times that an address that has the same scope
 212          * from the destination is chosen.
 213          */
 214         u_quad_t ip6s_sources_samescope[16];
 215         /*
 216          * number of times that an address that has a different scope
 217          * from the destination is chosen.
 218          */
 219         u_quad_t ip6s_sources_otherscope[16];
 220         /* number of times that an deprecated address is chosen */
 221         u_quad_t ip6s_sources_deprecated[16];
 222
 223         u_quad_t ip6s_forward_cachehit;
 224         u_quad_t ip6s_forward_cachemiss;
 225 };
 226
 227 #ifdef _KERNEL
 228 /*
 229  * IPv6 onion peeling state.
 230  * it will be initialized when we come into ip6_input().
 231  * XXX do not make it a kitchen sink!
 232  */
 233 struct ip6aux {
 234         u_int32_t ip6a_flags;
 235 #define IP6A_SWAP       0x01            /* swapped home/care-of on packet */
 236 #define IP6A_HASEEN     0x02            /* HA was present */
 237 #define IP6A_BRUID      0x04            /* BR Unique Identifier was present */
 238 #define IP6A_RTALERTSEEN 0x08           /* rtalert present */
 239
 240         /* ip6.ip6_src */
 241         struct in6_addr ip6a_careof;    /* care-of address of the peer */
 242         struct in6_addr ip6a_home;      /* home address of the peer */
 243         u_int16_t       ip6a_bruid;     /* BR unique identifier */
 244
 245         /* ip6.ip6_dst */
 246         struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
 247
 248         /* rtalert */
 249         u_int16_t ip6a_rtalert;         /* rtalert option value */
 250
 251         /*
 252          * decapsulation history will be here.
 253          * with IPsec it may not be accurate.
 254          */
 255 };
 256 #endif
 257
 258 #ifdef _KERNEL
 259 /* flags passed to ip6_output as last parameter */
 260 #define IPV6_DADOUTPUT          0x01    /* DAD */
 261 #define IPV6_FORWARDING         0x02    /* most of IPv6 header exists */
 262 #define IPV6_MINMTU             0x04    /* use minimum MTU (IPV6_USE_MIN_MTU) */
 263
 264 extern struct   ip6stat ip6stat;        /* statistics */
 265 extern u_int32_t ip6_id;                /* fragment identifier */
 266 extern int      ip6_defhlim;            /* default hop limit */
 267 extern int      ip6_defmcasthlim;       /* default multicast hop limit */
 268 extern int      ip6_forwarding;         /* act as router? */
 269 extern int      ip6_forward_srcrt;      /* forward src-routed? */
 270 extern int      ip6_gif_hlim;           /* Hop limit for gif encap packet */
 271 extern int      ip6_use_deprecated;     /* allow deprecated addr as source */
 272 extern int      ip6_rr_prune;           /* router renumbering prefix
 273                                          * walk list every 5 sec.    */
 274 extern int      ip6_v6only;
 275
 276 extern struct socket *ip6_mrouter;      /* multicast routing daemon */
 277 extern int      ip6_sendredirects;      /* send IP redirects when forwarding? */
 278 extern int      ip6_maxfragpackets; /* Maximum packets in reassembly queue */
 279 extern int      ip6_sourcecheck;        /* Verify source interface */
 280 extern int      ip6_sourcecheck_interval; /* Interval between log messages */
 281 extern int      ip6_accept_rtadv;       /* Acts as a host not a router */
 282 extern int      ip6_keepfaith;          /* Firewall Aided Internet Translator */
 283 extern int      ip6_log_interval;
 284 extern time_t   ip6_log_time;
 285 extern int      ip6_hdrnestlimit; /* upper limit of # of extension headers */
 286 extern int      ip6_dad_count;          /* DupAddrDetectionTransmits */
 287
 288 extern u_int32_t ip6_flow_seq;
 289 extern int ip6_auto_flowlabel;
 290 extern int ip6_auto_linklocal;
 291
 292 extern int   ip6_anonportmin;           /* minimum ephemeral port */
 293 extern int   ip6_anonportmax;           /* maximum ephemeral port */
 294 extern int   ip6_lowportmin;            /* minimum reserved port */
 295 extern int   ip6_lowportmax;            /* maximum reserved port */
 296
 297 extern int      ip6_use_tempaddr; /* whether to use temporary addresses. */
 298
 299 extern struct pfil_head inet6_pfil_hook;
 300
 301 extern struct   pr_usrreqs rip6_usrreqs;
 302
 303 struct proc;
 304 struct inpcb;
 305 struct sockopt;
 306 struct in6_ifaddr;
 307 struct ip6_hdr;
 308 struct netmsg;
 309
 310 int     icmp6_ctloutput (struct socket *, struct sockopt *sopt);
 311
 312 void    ip6_init (void);
 313 void    ip6intr (void);
 314 struct in6_ifaddr *ip6_getdstifaddr (struct mbuf *);
 315 void    ip6_freepcbopts (struct ip6_pktopts *);
 316 void    ip6_freemoptions (struct ip6_moptions *);
 317 int     ip6_unknown_opt (u_int8_t *, struct mbuf *, int);
 318 char *  ip6_get_prevhdr (struct mbuf *, int);
 319 int     ip6_nexthdr (struct mbuf *, int, int, int *);
 320 int     ip6_lasthdr (struct mbuf *, int, int, int *);
 321
 322 struct ip6aux *ip6_addaux (struct mbuf *);
 323 struct ip6aux *ip6_findaux (struct mbuf *);
 324 void    ip6_delaux (struct mbuf *);
 325
 326 int     ip6_mforward (struct ip6_hdr *, struct ifnet *, struct mbuf *);
 327 int     ip6_process_hopopts (struct mbuf *, u_int8_t *, int, u_int32_t *,
 328                                  u_int32_t *);
 329 void    ip6_savecontrol (struct inpcb *, struct mbuf **, struct ip6_hdr *,
 330                              struct mbuf *);
 331 void    ip6_notify_pmtu (struct inpcb *, struct sockaddr_in6 *,
 332                              u_int32_t *);
 333 int     ip6_sysctl (int *, u_int, void *, size_t *, void *, size_t);
 334
 335 void    ip6_forward (struct mbuf *, int);
 336
 337 void    ip6_mloopback (struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
 338 int     ip6_output (struct mbuf *, struct ip6_pktopts *,
 339                         struct route_in6 *,
 340                         int,
 341                         struct ip6_moptions *, struct ifnet **,
 342                         struct inpcb *);
 343 int     ip6_ctloutput (struct socket *, struct sockopt *sopt);
 344 void    init_ip6pktopts (struct ip6_pktopts *);
 345 int     ip6_setpktoptions (struct mbuf *, struct ip6_pktopts *, int, int);
 346 void    ip6_clearpktopts (struct ip6_pktopts *, int, int);
 347 struct ip6_pktopts *ip6_copypktopts (struct ip6_pktopts *, int);
 348 int     ip6_optlen (struct inpcb *);
 349
 350 int     route6_input (struct mbuf **, int *, int);
 351
 352 void    frag6_init (void);
 353 int     frag6_input (struct mbuf **, int *, int);
 354 void    frag6_slowtimo (void);
 355 void    frag6_drain (void);
 356
 357 void    rip6_init (void);
 358 int     rip6_input (struct mbuf **mp, int *offp, int proto);
 359 void    rip6_ctlinput (int, struct sockaddr *, void *);
 360 int     rip6_ctloutput (struct socket *so, struct sockopt *sopt);
 361 int     rip6_output (struct mbuf *, struct socket *, ...);
 362 int     rip6_usrreq (struct socket *,
 363             int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *);
 364
 365 int     dest6_input (struct mbuf **, int *, int);
 366 int     none_input (struct mbuf **, int *, int);
 367 #endif /* _KERNEL */
 368
 369 #endif /* !_NETINET6_IP6_VAR_H_ */