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Annotation of src/sys/netinet6/ip6_var.h, Revision 1.12.4.1

1.12.4.1! itojun      1: /*     $NetBSD: ip6_var.h,v 1.12 2000/03/21 23:53:31 itojun Exp $      */
1.12      itojun      2: /*     $KAME: ip6_var.h,v 1.28 2000/03/09 00:46:12 itojun Exp $        */
1.3       thorpej     3:
1.2       itojun      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:
                     71: /*
                     72:  * IP6 reassembly queue structure.  Each fragment
                     73:  * being reassembled is attached to one of these structures.
                     74:  */
                     75: struct ip6q {
1.9       itojun     76:        u_int32_t       ip6q_head;
                     77:        u_int16_t       ip6q_len;
                     78:        u_int8_t        ip6q_nxt;       /* ip6f_nxt in first fragment */
                     79:        u_int8_t        ip6q_hlim;
                     80:        struct ip6asfrag *ip6q_down;
                     81:        struct ip6asfrag *ip6q_up;
                     82:        u_int32_t       ip6q_ident;
                     83:        u_int8_t        ip6q_arrive;
                     84:        u_int8_t        ip6q_ttl;
                     85:        struct in6_addr ip6q_src, ip6q_dst;
                     86:        struct ip6q     *ip6q_next;
                     87:        struct ip6q     *ip6q_prev;
                     88:        int             ip6q_unfrglen;  /* len of unfragmentable part */
1.2       itojun     89: #ifdef notyet
1.9       itojun     90:        u_char          *ip6q_nxtp;
1.2       itojun     91: #endif
                     92: };
                     93:
                     94: struct ip6asfrag {
1.9       itojun     95:        u_int32_t       ip6af_head;
                     96:        u_int16_t       ip6af_len;
                     97:        u_int8_t        ip6af_nxt;
                     98:        u_int8_t        ip6af_hlim;
1.2       itojun     99:        /* must not override the above members during reassembling */
1.9       itojun    100:        struct ip6asfrag *ip6af_down;
                    101:        struct ip6asfrag *ip6af_up;
                    102:        struct mbuf     *ip6af_m;
                    103:        int             ip6af_offset;   /* offset in ip6af_m to next header */
                    104:        int             ip6af_frglen;   /* fragmentable part length */
                    105:        int             ip6af_off;      /* fragment offset */
                    106:        u_int16_t       ip6af_mff;      /* more fragment bit in frag off */
1.2       itojun    107: };
                    108:
                    109: #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
                    110:
                    111: struct ip6_moptions {
                    112:        struct  ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
                    113:        u_char  im6o_multicast_hlim;    /* hoplimit for outgoing multicasts */
                    114:        u_char  im6o_multicast_loop;    /* 1 >= hear sends if a member */
                    115:        LIST_HEAD(, in6_multi_mship) im6o_memberships;
                    116: };
                    117:
                    118: /*
                    119:  * Control options for outgoing packets
                    120:  */
                    121:
                    122: /* Routing header related info */
                    123: struct ip6po_rhinfo {
                    124:        struct  ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
                    125:        struct  route_in6 ip6po_rhi_route; /* Route to the 1st hop */
                    126: };
                    127: #define ip6po_rthdr    ip6po_rhinfo.ip6po_rhi_rthdr
                    128: #define ip6po_route    ip6po_rhinfo.ip6po_rhi_route
                    129:
                    130: struct ip6_pktopts {
                    131:        struct  mbuf *ip6po_m;  /* Pointer to mbuf storing the data */
                    132:        int     ip6po_hlim;             /* Hoplimit for outgoing packets */
                    133:        struct  in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */
                    134:        struct  sockaddr *ip6po_nexthop;        /* Next-hop address */
                    135:        struct  ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
                    136:        struct  ip6_dest *ip6po_dest1; /* Destination options header(1st part) */
                    137:        struct  ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */
                    138:        struct  ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */
                    139: };
                    140:
                    141: struct ip6stat {
1.5       bouyer    142:        u_quad_t ip6s_total;            /* total packets received */
                    143:        u_quad_t ip6s_tooshort;         /* packet too short */
                    144:        u_quad_t ip6s_toosmall;         /* not enough data */
                    145:        u_quad_t ip6s_fragments;        /* fragments received */
                    146:        u_quad_t ip6s_fragdropped;      /* frags dropped(dups, out of space) */
                    147:        u_quad_t ip6s_fragtimeout;      /* fragments timed out */
                    148:        u_quad_t ip6s_fragoverflow;     /* fragments that exceeded limit */
                    149:        u_quad_t ip6s_forward;          /* packets forwarded */
                    150:        u_quad_t ip6s_cantforward;      /* packets rcvd for unreachable dest */
                    151:        u_quad_t ip6s_redirectsent;     /* packets forwarded on same net */
1.6       itojun    152:        u_quad_t ip6s_delivered;        /* datagrams delivered to upper level*/
1.5       bouyer    153:        u_quad_t ip6s_localout;         /* total ip packets generated here */
                    154:        u_quad_t ip6s_odropped;         /* lost packets due to nobufs, etc. */
                    155:        u_quad_t ip6s_reassembled;      /* total packets reassembled ok */
                    156:        u_quad_t ip6s_fragmented;       /* datagrams sucessfully fragmented */
                    157:        u_quad_t ip6s_ofragments;       /* output fragments created */
                    158:        u_quad_t ip6s_cantfrag;         /* don't fragment flag was set, etc. */
                    159:        u_quad_t ip6s_badoptions;       /* error in option processing */
                    160:        u_quad_t ip6s_noroute;          /* packets discarded due to no route */
                    161:        u_quad_t ip6s_badvers;          /* ip6 version != 6 */
                    162:        u_quad_t ip6s_rawout;           /* total raw ip packets generated */
                    163:        u_quad_t ip6s_badscope;         /* scope error */
                    164:        u_quad_t ip6s_notmember;        /* don't join this multicast group */
                    165:        u_quad_t ip6s_nxthist[256];     /* next header history */
                    166:        u_quad_t ip6s_m1;               /* one mbuf */
                    167:        u_quad_t ip6s_m2m[32];          /* two or more mbuf */
                    168:        u_quad_t ip6s_mext1;            /* one ext mbuf */
                    169:        u_quad_t ip6s_mext2m;           /* two or more ext mbuf */
                    170:        u_quad_t ip6s_exthdrtoolong;    /* ext hdr are not continuous */
                    171:        u_quad_t ip6s_nogif;            /* no match gif found */
                    172:        u_quad_t ip6s_toomanyhdr;       /* discarded due to too many headers */
1.10      itojun    173:
                    174:        /*
                    175:         * statistics for improvement of the source address selection
                    176:         * algorithm:
                    177:         * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
                    178:         */
                    179:        /* number of times that address selection fails */
                    180:        u_quad_t ip6s_sources_none;
                    181:        /* number of times that an address on the outgoing I/F is chosen */
                    182:        u_quad_t ip6s_sources_sameif[16];
                    183:        /* number of times that an address on a non-outgoing I/F is chosen */
                    184:        u_quad_t ip6s_sources_otherif[16];
                    185:        /*
                    186:         * number of times that an address that has the same scope
                    187:         * from the destination is chosen.
                    188:         */
                    189:        u_quad_t ip6s_sources_samescope[16];
                    190:        /*
                    191:         * number of times that an address that has a different scope
                    192:         * from the destination is chosen.
                    193:         */
                    194:        u_quad_t ip6s_sources_otherscope[16];
                    195:        /* number of times that an deprecated address is chosen */
                    196:        u_quad_t ip6s_sources_deprecated[16];
1.2       itojun    197: };
                    198:
                    199: #ifdef _KERNEL
                    200: /* flags passed to ip6_output as last parameter */
                    201: #define        IPV6_DADOUTPUT          0x01    /* DAD */
                    202: #define        IPV6_FORWARDING         0x02    /* most of IPv6 header exists */
                    203:
                    204: extern struct  ip6stat ip6stat;        /* statistics */
1.4       itojun    205: extern u_int32_t ip6_id;               /* fragment identifier */
1.2       itojun    206: extern int     ip6_defhlim;            /* default hop limit */
                    207: extern int     ip6_defmcasthlim;       /* default multicast hop limit */
                    208: extern int     ip6_forwarding;         /* act as router? */
                    209: extern int     ip6_forward_srcrt;      /* forward src-routed? */
                    210: extern int     ip6_gif_hlim;           /* Hop limit for gif encap packet */
1.6       itojun    211: extern int     ip6_use_deprecated;     /* allow deprecated addr as source */
                    212: extern int     ip6_rr_prune;           /* router renumbering prefix
                    213:                                         * walk list every 5 sec.    */
1.7       itojun    214: #ifndef INET6_BINDV6ONLY
                    215: extern int     ip6_bindv6only;
                    216: #endif
1.6       itojun    217:
1.2       itojun    218: extern struct socket *ip6_mrouter;     /* multicast routing daemon */
                    219: extern int     ip6_sendredirects;      /* send IP redirects when forwarding? */
                    220: extern int     ip6_maxfragpackets; /* Maximum packets in reassembly queue */
                    221: extern int     ip6_sourcecheck;        /* Verify source interface */
                    222: extern int     ip6_sourcecheck_interval; /* Interval between log messages */
                    223: extern int     ip6_accept_rtadv;       /* Acts as a host not a router */
                    224: extern int     ip6_keepfaith;          /* Firewall Aided Internet Translator */
                    225: extern int     ip6_log_interval;
                    226: extern time_t  ip6_log_time;
                    227: extern int     ip6_hdrnestlimit; /* upper limit of # of extension headers */
                    228: extern int     ip6_dad_count;          /* DupAddrDetectionTransmits */
                    229:
                    230: extern u_int32_t ip6_flow_seq;
                    231: extern int ip6_auto_flowlabel;
                    232:
                    233: struct in6pcb;
1.6       itojun    234:
1.2       itojun    235: int    icmp6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
1.6       itojun    236:
1.2       itojun    237: void   ip6_init __P((void));
                    238: void   ip6intr __P((void));
                    239: void   ip6_input __P((struct mbuf *));
                    240: void   ip6_freemoptions __P((struct ip6_moptions *));
                    241: int    ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
                    242: char * ip6_get_prevhdr __P((struct mbuf *, int));
1.12      itojun    243: int    ip6_nexthdr __P((struct mbuf *, int, int, int *));
                    244: int    ip6_lasthdr __P((struct mbuf *, int, int, int *));
1.2       itojun    245: int    ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));
1.4       itojun    246: int    ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
1.2       itojun    247:                                 u_int32_t *));
                    248: void   ip6_savecontrol __P((struct in6pcb *, struct mbuf **, struct ip6_hdr *,
                    249:                struct mbuf *));
                    250: int    ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
                    251:
                    252: void   ip6_forward __P((struct mbuf *, int));
                    253:
                    254: void   ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
                    255: int    ip6_output __P((struct mbuf *, struct ip6_pktopts *,
                    256:                        struct route_in6 *, int,
1.6       itojun    257:                        struct ip6_moptions *, struct ifnet **));
1.2       itojun    258: int    ip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
                    259: int    ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, int));
                    260: int    ip6_optlen __P((struct in6pcb *));
                    261:
                    262: int    route6_input __P((struct mbuf **, int *, int));
                    263:
                    264: void   frag6_init __P((void));
                    265: int    frag6_input __P((struct mbuf **, int *, int));
                    266: void   frag6_slowtimo __P((void));
                    267: void   frag6_drain __P((void));
                    268:
                    269: void   rip6_init __P((void));
                    270: int    rip6_input __P((struct mbuf **mp, int *offp, int proto));
1.11      itojun    271: void   rip6_ctlinput __P((int, struct sockaddr *, void *));
1.2       itojun    272: int    rip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
                    273: int    rip6_output __P((struct mbuf *, ...));
                    274: int    rip6_usrreq __P((struct socket *,
                    275:            int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *));
                    276:
                    277: int    dest6_input __P((struct mbuf **, int *, int));
                    278: int    none_input __P((struct mbuf **, int *, int));
                    279: #endif /* _KERNEL */
                    280:
                    281: #endif /* !_NETINET6_IP6_VAR_H_ */

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