bsd/netinet6/ip6_var.h

   1 /*      $FreeBSD: src/sys/netinet6/ip6_var.h,v 1.2.2.2 2001/07/03 11:01:54 ume Exp $    */
   2 /*      $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $        */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1982, 1986, 1993
  35  *      The Regents of the University of California.  All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. All advertising materials mentioning features or use of this software
  46  *    must display the following acknowledgement:
  47  *      This product includes software developed by the University of
  48  *      California, Berkeley and its contributors.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  *
  65  *      @(#)ip_var.h    8.1 (Berkeley) 6/10/93
  66  */
  67
  68 #ifndef _NETINET6_IP6_VAR_H_
  69 #define _NETINET6_IP6_VAR_H_
  70 #include <sys/appleapiopts.h>
  71
  72 #ifdef KERNEL_PRIVATE
  73 /*
  74  * IP6 reassembly queue structure.  Each fragment
  75  * being reassembled is attached to one of these structures.
  76  */
  77 struct  ip6q {
  78         u_int32_t       ip6q_head;
  79         u_int16_t       ip6q_len;
  80         u_int8_t        ip6q_nxt;       /* ip6f_nxt in first fragment */
  81         u_int8_t        ip6q_hlim;
  82         struct ip6asfrag *ip6q_down;
  83         struct ip6asfrag *ip6q_up;
  84         u_int32_t       ip6q_ident;
  85         u_int8_t        ip6q_arrive;
  86         u_int8_t        ip6q_ttl;
  87         struct in6_addr ip6q_src, ip6q_dst;
  88         struct ip6q     *ip6q_next;
  89         struct ip6q     *ip6q_prev;
  90         int             ip6q_unfrglen;  /* len of unfragmentable part */
  91 #if notyet
  92         u_char  *ip6q_nxtp;
  93 #endif
  94         int                     ip6q_nfrag;     /* number of fragments */
  95 };
  96
  97 struct  ip6asfrag {
  98         u_int32_t       ip6af_head;
  99         u_int16_t       ip6af_len;
 100         u_int8_t        ip6af_nxt;
 101         u_int8_t        ip6af_hlim;
 102         /* must not override the above members during reassembling */
 103         struct ip6asfrag *ip6af_down;
 104         struct ip6asfrag *ip6af_up;
 105         struct mbuf     *ip6af_m;
 106         int             ip6af_offset;   /* offset in ip6af_m to next header */
 107         int             ip6af_frglen;   /* fragmentable part length */
 108         int             ip6af_off;      /* fragment offset */
 109         u_int16_t       ip6af_mff;      /* more fragment bit in frag off */
 110 };
 111
 112 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
 113
 114 struct  ip6_moptions {
 115         struct  ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
 116         u_char  im6o_multicast_hlim;    /* hoplimit for outgoing multicasts */
 117         u_char  im6o_multicast_loop;    /* 1 >= hear sends if a member */
 118         LIST_HEAD(, in6_multi_mship) im6o_memberships;
 119 };
 120
 121 /*
 122  * Control options for outgoing packets
 123  */
 124
 125 /* Routing header related info */
 126 struct  ip6po_rhinfo {
 127         struct  ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
 128         struct  route_in6 ip6po_rhi_route; /* Route to the 1st hop */
 129 };
 130 #define ip6po_rthdr     ip6po_rhinfo.ip6po_rhi_rthdr
 131 #define ip6po_route     ip6po_rhinfo.ip6po_rhi_route
 132
 133 struct  ip6_pktopts {
 134         struct  mbuf *ip6po_m;  /* Pointer to mbuf storing the data */
 135         int     ip6po_hlim;     /* Hoplimit for outgoing packets */
 136
 137         /* Outgoing IF/address information */
 138         struct  in6_pktinfo *ip6po_pktinfo;
 139
 140         struct  sockaddr *ip6po_nexthop; /* Next-hop address */
 141
 142         struct  ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
 143
 144         /* Destination options header (before a routing header) */
 145         struct  ip6_dest *ip6po_dest1;
 146
 147         /* Routing header related info. */
 148         struct  ip6po_rhinfo ip6po_rhinfo;
 149
 150         /* Destination options header (after a routing header) */
 151         struct  ip6_dest *ip6po_dest2;
 152 };
 153
 154 /*
 155  * Control options for incoming packets
 156  */
 157 #endif /* KERNEL_PRIVATE */
 158
 159 struct  ip6stat {
 160         u_quad_t ip6s_total;            /* total packets received */
 161         u_quad_t ip6s_tooshort;         /* packet too short */
 162         u_quad_t ip6s_toosmall;         /* not enough data */
 163         u_quad_t ip6s_fragments;        /* fragments received */
 164         u_quad_t ip6s_fragdropped;      /* frags dropped(dups, out of space) */
 165         u_quad_t ip6s_fragtimeout;      /* fragments timed out */
 166         u_quad_t ip6s_fragoverflow;     /* fragments that exceeded limit */
 167         u_quad_t ip6s_forward;          /* packets forwarded */
 168         u_quad_t ip6s_cantforward;      /* packets rcvd for unreachable dest */
 169         u_quad_t ip6s_redirectsent;     /* packets forwarded on same net */
 170         u_quad_t ip6s_delivered;        /* datagrams delivered to upper level*/
 171         u_quad_t ip6s_localout;         /* total ip packets generated here */
 172         u_quad_t ip6s_odropped;         /* lost packets due to nobufs, etc. */
 173         u_quad_t ip6s_reassembled;      /* total packets reassembled ok */
 174         u_quad_t ip6s_fragmented;       /* datagrams sucessfully fragmented */
 175         u_quad_t ip6s_ofragments;       /* output fragments created */
 176         u_quad_t ip6s_cantfrag;         /* don't fragment flag was set, etc. */
 177         u_quad_t ip6s_badoptions;       /* error in option processing */
 178         u_quad_t ip6s_noroute;          /* packets discarded due to no route */
 179         u_quad_t ip6s_badvers;          /* ip6 version != 6 */
 180         u_quad_t ip6s_rawout;           /* total raw ip packets generated */
 181         u_quad_t ip6s_badscope;         /* scope error */
 182         u_quad_t ip6s_notmember;        /* don't join this multicast group */
 183         u_quad_t ip6s_nxthist[256];     /* next header history */
 184         u_quad_t ip6s_m1;               /* one mbuf */
 185         u_quad_t ip6s_m2m[32];          /* two or more mbuf */
 186         u_quad_t ip6s_mext1;            /* one ext mbuf */
 187         u_quad_t ip6s_mext2m;           /* two or more ext mbuf */
 188         u_quad_t ip6s_exthdrtoolong;    /* ext hdr are not continuous */
 189         u_quad_t ip6s_nogif;            /* no match gif found */
 190         u_quad_t ip6s_toomanyhdr;       /* discarded due to too many headers */
 191
 192         /*
 193          * statistics for improvement of the source address selection
 194          * algorithm:
 195          * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
 196          */
 197         /* number of times that address selection fails */
 198         u_quad_t ip6s_sources_none;
 199         /* number of times that an address on the outgoing I/F is chosen */
 200         u_quad_t ip6s_sources_sameif[16];
 201         /* number of times that an address on a non-outgoing I/F is chosen */
 202         u_quad_t ip6s_sources_otherif[16];
 203         /*
 204          * number of times that an address that has the same scope
 205          * from the destination is chosen.
 206          */
 207         u_quad_t ip6s_sources_samescope[16];
 208         /*
 209          * number of times that an address that has a different scope
 210          * from the destination is chosen.
 211          */
 212         u_quad_t ip6s_sources_otherscope[16];
 213         /* number of times that an deprecated address is chosen */
 214         u_quad_t ip6s_sources_deprecated[16];
 215
 216         u_quad_t ip6s_forward_cachehit;
 217         u_quad_t ip6s_forward_cachemiss;
 218 };
 219
 220 #ifdef KERNEL_PRIVATE
 221 #ifdef KERNEL
 222 /*
 223  * IPv6 onion peeling state.
 224  * it will be initialized when we come into ip6_input().
 225  * XXX do not make it a kitchen sink!
 226  */
 227 struct ip6aux {
 228         u_int32_t ip6a_flags;
 229 #define IP6A_SWAP       0x01            /* swapped home/care-of on packet */
 230 #define IP6A_HASEEN     0x02            /* HA was present */
 231 #define IP6A_BRUID      0x04            /* BR Unique Identifier was present */
 232 #define IP6A_RTALERTSEEN 0x08           /* rtalert present */
 233
 234         /* ip6.ip6_src */
 235         struct in6_addr ip6a_careof;    /* care-of address of the peer */
 236         struct in6_addr ip6a_home;      /* home address of the peer */
 237         u_int16_t       ip6a_bruid;     /* BR unique identifier */
 238
 239         /* ip6.ip6_dst */
 240         struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
 241
 242         /* rtalert */
 243         u_int16_t ip6a_rtalert;         /* rtalert option value */
 244
 245         /*
 246          * decapsulation history will be here.
 247          * with IPsec it may not be accurate.
 248          */
 249 };
 250
 251 /* flags passed to ip6_output as last parameter */
 252 #define IPV6_DADOUTPUT          0x01    /* DAD */
 253 #define IPV6_FORWARDING         0x02    /* most of IPv6 header exists */
 254 #define IPV6_MINMTU             0x04    /* use minimum MTU (IPV6_USE_MIN_MTU) */
 255
 256 extern struct   ip6stat ip6stat;        /* statistics */
 257 extern u_int32_t ip6_id;                /* fragment identifier */
 258 extern int      ip6_defhlim;            /* default hop limit */
 259 extern int      ip6_defmcasthlim;       /* default multicast hop limit */
 260 extern int      ip6_forwarding;         /* act as router? */
 261 extern int      ip6_forward_srcrt;      /* forward src-routed? */
 262 extern int      ip6_gif_hlim;           /* Hop limit for gif encap packet */
 263 extern int      ip6_use_deprecated;     /* allow deprecated addr as source */
 264 extern int      ip6_rr_prune;           /* router renumbering prefix
 265                                          * walk list every 5 sec.    */
 266 #define ip6_mapped_addr_on      (!ip6_v6only)
 267 extern int      ip6_v6only;
 268
 269 extern struct socket *ip6_mrouter;      /* multicast routing daemon */
 270 extern int      ip6_sendredirects;      /* send IP redirects when forwarding? */
 271 extern int      ip6_maxfragpackets;     /* Maximum packets in reassembly queue */
 272 extern int      ip6_maxfrags;           /* Maximum fragments in reassembly queue */
 273 extern int      ip6_sourcecheck;        /* Verify source interface */
 274 extern int      ip6_sourcecheck_interval; /* Interval between log messages */
 275 extern int      ip6_accept_rtadv;       /* Acts as a host not a router */
 276 extern int      ip6_keepfaith;          /* Firewall Aided Internet Translator */
 277 extern int      ip6_log_interval;
 278 extern time_t   ip6_log_time;
 279 extern int      ip6_hdrnestlimit; /* upper limit of # of extension headers */
 280 extern int      ip6_dad_count;          /* DupAddrDetectionTransmits */
 281
 282 extern u_int32_t ip6_flow_seq;
 283 extern int ip6_auto_flowlabel;
 284 extern int ip6_auto_linklocal;
 285
 286 extern int   ip6_anonportmin;           /* minimum ephemeral port */
 287 extern int   ip6_anonportmax;           /* maximum ephemeral port */
 288 extern int   ip6_lowportmin;            /* minimum reserved port */
 289 extern int   ip6_lowportmax;            /* maximum reserved port */
 290
 291 extern int      ip6_use_tempaddr; /* whether to use temporary addresses. */
 292
 293 extern struct   pr_usrreqs rip6_usrreqs;
 294 struct sockopt;
 295
 296 struct inpcb;
 297
 298 int     icmp6_ctloutput(struct socket *, struct sockopt *sopt);
 299
 300 struct in6_ifaddr;
 301 void    ip6_init(void);
 302 void    ip6intr(void);
 303 void    ip6_input(struct mbuf *);
 304 struct in6_ifaddr *ip6_getdstifaddr(struct mbuf *);
 305 void    ip6_freepcbopts(struct ip6_pktopts *);
 306 void    ip6_freemoptions(struct ip6_moptions *);
 307 int     ip6_unknown_opt(u_int8_t *, struct mbuf *, int, int);
 308 char *  ip6_get_prevhdr(struct mbuf *, int);
 309 int     ip6_nexthdr(struct mbuf *, int, int, int *);
 310 int     ip6_lasthdr(struct mbuf *, int, int, int *);
 311
 312 struct mbuf *ip6_addaux(struct mbuf *);
 313 struct mbuf *ip6_findaux(struct mbuf *);
 314 void    ip6_delaux(struct mbuf *);
 315
 316 int     ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
 317 int     ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
 318                                  u_int32_t *);
 319 void    ip6_savecontrol(struct inpcb *, struct mbuf **, struct ip6_hdr *,
 320                              struct mbuf *);
 321 void    ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *,
 322                              u_int32_t *);
 323 int     ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
 324
 325 void    ip6_forward(struct mbuf *, int, int);
 326
 327 void    ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
 328 int     ip6_output(struct mbuf *, struct ip6_pktopts *,
 329                         struct route_in6 *,
 330                         int,
 331                         struct ip6_moptions *, struct ifnet **, int locked);
 332 int     ip6_ctloutput(struct socket *, struct sockopt *sopt);
 333 void    init_ip6pktopts(struct ip6_pktopts *);
 334 int     ip6_setpktoptions(struct mbuf *, struct ip6_pktopts *, int, int);
 335 void    ip6_clearpktopts(struct ip6_pktopts *, int, int);
 336 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
 337 int     ip6_optlen(struct inpcb *);
 338
 339 int     route6_input(struct mbuf **, int *);
 340
 341 void    frag6_init(void);
 342 int     frag6_input(struct mbuf **, int *);
 343 void    frag6_slowtimo(void);
 344 void    frag6_drain(void);
 345
 346 void    rip6_init(void);
 347 int     rip6_input(struct mbuf **mp, int *offset);
 348 void    rip6_ctlinput(int, struct sockaddr *, void *);
 349 int     rip6_ctloutput(struct socket *so, struct sockopt *sopt);
 350 int     rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *, struct mbuf *);
 351 int     rip6_usrreq(struct socket *,
 352             int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *);
 353
 354 int     dest6_input(struct mbuf **, int *);
 355 int     none_input(struct mbuf **, int *);
 356 #endif /* KERNEL */
 357 #endif /* KERNEL_PRIVATE */
 358
 359 #endif /* !_NETINET6_IP6_VAR_H_ */