bsd/netinet6/ip6_var.h

   1 /*      $KAME: ip6_var.h,v 1.31 2000/04/04 08:48:26 itojun Exp $        */
   2
   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
  32 /*
  33  * Copyright (c) 1982, 1986, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)ip_var.h    8.1 (Berkeley) 6/10/93
  65  */
  66
  67 #ifndef _NETINET6_IP6_VAR_H_
  68 #define _NETINET6_IP6_VAR_H_
  69
  70 /*
  71  * IP6 reassembly queue structure.  Each fragment
  72  * being reassembled is attached to one of these structures.
  73  */
  74 struct  ip6q {
  75         u_int32_t       ip6q_head;
  76         u_int16_t       ip6q_len;
  77         u_int8_t        ip6q_nxt;       /* ip6f_nxt in first fragment */
  78         u_int8_t        ip6q_hlim;
  79         struct ip6asfrag *ip6q_down;
  80         struct ip6asfrag *ip6q_up;
  81         u_int32_t       ip6q_ident;
  82         u_int8_t        ip6q_arrive;
  83         u_int8_t        ip6q_ttl;
  84         struct in6_addr ip6q_src, ip6q_dst;
  85         struct ip6q     *ip6q_next;
  86         struct ip6q     *ip6q_prev;
  87         int             ip6q_unfrglen;  /* len of unfragmentable part */
  88 #if notyet
  89         u_char  *ip6q_nxtp;
  90 #endif
  91 };
  92
  93 struct  ip6asfrag {
  94         u_int32_t       ip6af_head;
  95         u_int16_t       ip6af_len;
  96         u_int8_t        ip6af_nxt;
  97         u_int8_t        ip6af_hlim;
  98         /* must not override the above members during reassembling */
  99         struct ip6asfrag *ip6af_down;
 100         struct ip6asfrag *ip6af_up;
 101         struct mbuf     *ip6af_m;
 102         int             ip6af_offset;   /* offset in ip6af_m to next header */
 103         int             ip6af_frglen;   /* fragmentable part length */
 104         int             ip6af_off;      /* fragment offset */
 105         u_int16_t       ip6af_mff;      /* more fragment bit in frag off */
 106 };
 107
 108 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
 109
 110 struct  ip6_moptions {
 111         struct  ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
 112         u_char  im6o_multicast_hlim;    /* hoplimit for outgoing multicasts */
 113         u_char  im6o_multicast_loop;    /* 1 >= hear sends if a member */
 114         LIST_HEAD(, in6_multi_mship) im6o_memberships;
 115 };
 116
 117 /*
 118  * Control options for outgoing packets
 119  */
 120
 121 /* Routing header related info */
 122 struct  ip6po_rhinfo {
 123         struct  ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
 124         struct  route_in6 ip6po_rhi_route; /* Route to the 1st hop */
 125 };
 126 #define ip6po_rthdr     ip6po_rhinfo.ip6po_rhi_rthdr
 127 #define ip6po_route     ip6po_rhinfo.ip6po_rhi_route
 128
 129 struct  ip6_pktopts {
 130         int     ip6po_hlim;     /* Hoplimit for outgoing packets */
 131
 132         /* Outgoing IF/address information */
 133         struct  in6_pktinfo *ip6po_pktinfo;
 134
 135         struct  sockaddr *ip6po_nexthop; /* Next-hop address */
 136
 137         struct  ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
 138
 139         /* Destination options header (before a routing header) */
 140         struct  ip6_dest *ip6po_dest1;
 141
 142         /* Routing header related info. */
 143         struct  ip6po_rhinfo ip6po_rhinfo;
 144
 145         /* Destination options header (after a routing header) */
 146         struct  ip6_dest *ip6po_dest2;
 147
 148         int ip6po_flags;
 149 #define IP6PO_REACHCONF 0x01    /* upper-layer reachability confirmation */
 150 #define IP6PO_MINMTU    0x02    /* use minimum MTU (IPV6_USE_MIN_MTU) */
 151 };
 152
 153 /*
 154  * Control options for incoming packets
 155  */
 156
 157 struct ip6_recvpktopts {
 158         struct mbuf *head;      /* mbuf chain of data passed to a user */
 159
 160 #ifdef SO_TIMESTAMP
 161         struct mbuf *timestamp; /* timestamp */
 162 #endif
 163         struct mbuf *hlim;      /* received hop limit */
 164         struct mbuf *pktinfo;   /* packet information of rcv packet */
 165         struct mbuf *hbh;       /* HbH options header of rcv packet */
 166         struct mbuf *dest1;     /* Dest opt header of rcv packet */
 167         struct mbuf *dest2; /* Dest opt header (after rthdr) of rcv packet */
 168         struct mbuf *rthdr;     /* Routing header of rcv packet */
 169 };
 170
 171 struct  ip6stat {
 172         u_quad_t ip6s_total;            /* total packets received */
 173         u_quad_t ip6s_tooshort;         /* packet too short */
 174         u_quad_t ip6s_toosmall;         /* not enough data */
 175         u_quad_t ip6s_fragments;        /* fragments received */
 176         u_quad_t ip6s_fragdropped;      /* frags dropped(dups, out of space) */
 177         u_quad_t ip6s_fragtimeout;      /* fragments timed out */
 178         u_quad_t ip6s_fragoverflow;     /* fragments that exceeded limit */
 179         u_quad_t ip6s_forward;          /* packets forwarded */
 180         u_quad_t ip6s_cantforward;      /* packets rcvd for unreachable dest */
 181         u_quad_t ip6s_redirectsent;     /* packets forwarded on same net */
 182         u_quad_t ip6s_delivered;        /* datagrams delivered to upper level*/
 183         u_quad_t ip6s_localout;         /* total ip packets generated here */
 184         u_quad_t ip6s_odropped;         /* lost packets due to nobufs, etc. */
 185         u_quad_t ip6s_reassembled;      /* total packets reassembled ok */
 186         u_quad_t ip6s_fragmented;       /* datagrams sucessfully fragmented */
 187         u_quad_t ip6s_ofragments;       /* output fragments created */
 188         u_quad_t ip6s_cantfrag;         /* don't fragment flag was set, etc. */
 189         u_quad_t ip6s_badoptions;       /* error in option processing */
 190         u_quad_t ip6s_noroute;          /* packets discarded due to no route */
 191         u_quad_t ip6s_badvers;          /* ip6 version != 6 */
 192         u_quad_t ip6s_rawout;           /* total raw ip packets generated */
 193         u_quad_t ip6s_badscope;         /* scope error */
 194         u_quad_t ip6s_notmember;        /* don't join this multicast group */
 195         u_quad_t ip6s_nxthist[256];     /* next header history */
 196         u_quad_t ip6s_m1;               /* one mbuf */
 197         u_quad_t ip6s_m2m[32];          /* two or more mbuf */
 198         u_quad_t ip6s_mext1;            /* one ext mbuf */
 199         u_quad_t ip6s_mext2m;           /* two or more ext mbuf */
 200         u_quad_t ip6s_exthdrtoolong;    /* ext hdr are not continuous */
 201         u_quad_t ip6s_nogif;            /* no match gif found */
 202         u_quad_t ip6s_toomanyhdr;       /* discarded due to too many headers */
 203         /* XXX the following two items are not really AF_INET6 thing */
 204         u_quad_t ip6s_exthdrget;        /* # of calls to IP6_EXTHDR_GET */
 205         u_quad_t ip6s_exthdrget0;       /* # of calls to IP6_EXTHDR_GET0 */
 206         u_quad_t ip6s_pulldown;         /* # of calls to m_pulldown */
 207         u_quad_t ip6s_pulldown_copy;    /* # of mbuf copies in m_pulldown */
 208         u_quad_t ip6s_pulldown_alloc;   /* # of mbuf allocs in m_pulldown */
 209         u_quad_t ip6s_pullup;           /* # of calls to m_pullup */
 210         u_quad_t ip6s_pullup_copy;      /* # of possible m_pullup copies */
 211         u_quad_t ip6s_pullup_alloc;     /* # of possible m_pullup mallocs */
 212         u_quad_t ip6s_pullup_fail;      /* # of possible m_pullup failures */
 213         u_quad_t ip6s_pullup2;          /* # of calls to m_pullup2 */
 214         u_quad_t ip6s_pullup2_copy;     /* # of possible m_pullup2 copies */
 215         u_quad_t ip6s_pullup2_alloc;    /* # of possible m_pullup2 mallocs */
 216         u_quad_t ip6s_pullup2_fail;     /* # of possible m_pullup2 failures */
 217
 218         /*
 219          * statistics for improvement of the source address selection
 220          * algorithm:
 221          * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
 222          */
 223         /* number of times that address selection fails */
 224         u_quad_t ip6s_sources_none;
 225         /* number of times that an address on the outgoing I/F is chosen */
 226         u_quad_t ip6s_sources_sameif[16];
 227         /* number of times that an address on a non-outgoing I/F is chosen */
 228         u_quad_t ip6s_sources_otherif[16];
 229         /*
 230          * number of times that an address that has the same scope
 231          * from the destination is chosen.
 232          */
 233         u_quad_t ip6s_sources_samescope[16];
 234         /*
 235          * number of times that an address that has a different scope
 236          * from the destination is chosen.
 237          */
 238         u_quad_t ip6s_sources_otherscope[16];
 239         /* number of times that an deprecated address is chosen */
 240         u_quad_t ip6s_sources_deprecated[16];
 241 };
 242
 243 #if KERNEL
 244 /* flags passed to ip6_output as last parameter */
 245 #define IPV6_DADOUTPUT          0x01    /* DAD */
 246 #define IPV6_FORWARDING         0x02    /* most of IPv6 header exists */
 247 #define IPV6_MINMTU             0x04    /* use minimum MTU (IPV6_USE_MIN_MTU) */
 248
 249 extern struct   ip6stat ip6stat;        /* statistics */
 250 extern u_int32_t ip6_id;                /* fragment identifier */
 251 extern int      ip6_defhlim;            /* default hop limit */
 252 extern int      ip6_defmcasthlim;       /* default multicast hop limit */
 253 extern int      ip6_forwarding;         /* act as router? */
 254 extern int      ip6_forward_srcrt;      /* forward src-routed? */
 255 extern int      ip6_gif_hlim;           /* Hop limit for gif encap packet */
 256 extern int      ip6_use_deprecated;     /* allow deprecated addr as source */
 257 extern int      ip6_rr_prune;           /* router renumbering prefix
 258                                          * walk list every 5 sec.    */
 259 #if INET6
 260 extern int      ip6_mapped_addr_on;
 261 #endif
 262 #if defined(__NetBSD__) && !defined(INET6_BINDV6ONLY)
 263 extern int      ip6_bindv6only;
 264 #endif
 265
 266 extern struct socket *ip6_mrouter;      /* multicast routing daemon */
 267 extern int      ip6_sendredirects;      /* send IP redirects when forwarding? */
 268 extern int      ip6_maxfragpackets; /* Maximum packets in reassembly queue */
 269 extern int      ip6_sourcecheck;        /* Verify source interface */
 270 extern int      ip6_sourcecheck_interval; /* Interval between log messages */
 271 extern int      ip6_accept_rtadv;       /* Acts as a host not a router */
 272 extern int      ip6_keepfaith;          /* Firewall Aided Internet Translator */
 273 extern int      ip6_log_interval;
 274 extern time_t   ip6_log_time;
 275 extern int      ip6_hdrnestlimit; /* upper limit of # of extension headers */
 276 extern int      ip6_dad_count;          /* DupAddrDetectionTransmits */
 277
 278 extern u_int32_t ip6_flow_seq;
 279 extern int ip6_auto_flowlabel;
 280
 281 #if !defined(__APPLE__)
 282 //#if !defined(__FreeBSD__) || __FreeBSD__ < 3
 283 struct in6pcb;
 284 #endif
 285 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
 286 extern struct   pr_usrreqs rip6_usrreqs;
 287
 288 struct inpcb;
 289 struct sockopt;
 290 #endif
 291
 292 #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined (__APPLE__)
 293 int     icmp6_ctloutput __P((struct socket *, struct sockopt *sopt));
 294 #else
 295 int     icmp6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
 296 #endif
 297
 298 void    ip6_init __P((void));
 299 void    ip6intr __P((void));
 300 void    ip6_input __P((struct mbuf *));
 301 void    ip6_freepcbopts __P((struct ip6_pktopts *));
 302 void    ip6_freemoptions __P((struct ip6_moptions *));
 303 int     ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
 304 char *  ip6_get_prevhdr __P((struct mbuf *, int));
 305 int     ip6_nexthdr __P((struct mbuf *, int, int, int *));
 306 int     ip6_lasthdr __P((struct mbuf *, int, int, int *));
 307 int     ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));
 308 int     ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
 309                                  u_int32_t *));
 310 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
 311 void    ip6_savecontrol __P((struct inpcb *, struct ip6_hdr *, struct mbuf *,
 312                              struct ip6_recvpktopts *,
 313                              struct ip6_recvpktopts **));
 314 #else
 315 void    ip6_savecontrol __P((struct in6pcb *, struct ip6_hdr *, struct mbuf *,
 316                              struct ip6_recvpktopts *,
 317                              struct ip6_recvpktopts **));
 318 #endif
 319 void    ip6_update_recvpcbopt __P((struct ip6_recvpktopts *,
 320                                    struct ip6_recvpktopts *));
 321 void    ip6_reset_rcvopt __P((struct ip6_recvpktopts *, int));
 322 int     ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
 323
 324 void    ip6_forward __P((struct mbuf *, int));
 325
 326 void    ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
 327 int     ip6_output __P((struct mbuf *, struct ip6_pktopts *,
 328                         struct route_in6 *, int,
 329                         struct ip6_moptions *, struct ifnet **));
 330 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
 331 int     ip6_ctloutput __P((struct socket *, struct sockopt *sopt));
 332 #else
 333 int     ip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
 334 #endif
 335 int     ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, int, int));
 336 void    ip6_clearpktopts __P((struct ip6_pktopts *, int, int));
 337 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
 338 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
 339 int     ip6_optlen __P((struct inpcb *));
 340 #else
 341 int     ip6_optlen __P((struct in6pcb *));
 342 #endif
 343
 344 int     route6_input __P((struct mbuf **, int *, int));
 345
 346 void    frag6_init __P((void));
 347 int     frag6_input __P((struct mbuf **, int *, int));
 348 void    frag6_slowtimo __P((void));
 349 void    frag6_drain __P((void));
 350
 351 void    rip6_init __P((void));
 352 int     rip6_input __P((struct mbuf **mp, int *offp, int proto));
 353 void    rip6_ctlinput __P((int, struct sockaddr *, void *));
 354 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
 355 int     rip6_ctloutput __P((struct socket *so, struct sockopt *sopt));
 356 #else
 357 int     rip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
 358 #endif
 359 int     rip6_output __P((struct mbuf *, struct socket *, struct sockaddr_in6 *,
 360                         struct mbuf *));
 361 int     rip6_usrreq __P((struct socket *,
 362             int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *));
 363
 364 int     dest6_input __P((struct mbuf **, int *, int));
 365 int     none_input __P((struct mbuf **, int *, int));
 366 #endif /* _KERNEL */
 367
 368 #endif /* !_NETINET6_IP6_VAR_H_ */