FreeBSD/Linux Kernel Cross Reference
sys/netinet6/ip6_var.h

     /*      $NetBSD: ip6_var.h,v 1.32.2.1 2007/06/04 19:24:35 bouyer Exp $  */
     /*      $KAME: ip6_var.h,v 1.33 2000/06/11 14:59:20 jinmei Exp $        */
     
     /*
      * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the project nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * Copyright (c) 1982, 1986, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)ip_var.h    8.1 (Berkeley) 6/10/93
     */
    
    #ifndef _NETINET6_IP6_VAR_H_
    #define _NETINET6_IP6_VAR_H_
    
    /*
     * IP6 reassembly queue structure.  Each fragment
     * being reassembled is attached to one of these structures.
     */
    struct  ip6q {
            u_int32_t       ip6q_head;
            u_int16_t       ip6q_len;
            u_int8_t        ip6q_nxt;       /* ip6f_nxt in first fragment */
            u_int8_t        ip6q_hlim;
            struct ip6asfrag *ip6q_down;
            struct ip6asfrag *ip6q_up;
            u_int32_t       ip6q_ident;
            u_int8_t        ip6q_arrive;
            u_int8_t        ip6q_ttl;
            struct in6_addr ip6q_src, ip6q_dst;
            struct ip6q     *ip6q_next;
            struct ip6q     *ip6q_prev;
            int             ip6q_unfrglen;  /* len of unfragmentable part */
    #ifdef notyet
            u_char          *ip6q_nxtp;
    #endif
            int             ip6q_nfrag;     /* # of fragments */
    };
    
    struct  ip6asfrag {
            u_int32_t       ip6af_head;
            u_int16_t       ip6af_len;
            u_int8_t        ip6af_nxt;
            u_int8_t        ip6af_hlim;
            /* must not override the above members during reassembling */
            struct ip6asfrag *ip6af_down;
            struct ip6asfrag *ip6af_up;
            struct mbuf     *ip6af_m;
           int             ip6af_offset;   /* offset in ip6af_m to next header */
           int             ip6af_frglen;   /* fragmentable part length */
           int             ip6af_off;      /* fragment offset */
           u_int16_t       ip6af_mff;      /* more fragment bit in frag off */
   };
   
   #define IP6_REASS_MBUF(ip6af) ((ip6af)->ip6af_m)
   
   struct  ip6_moptions {
           struct  ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
           u_char  im6o_multicast_hlim;    /* hoplimit for outgoing multicasts */
           u_char  im6o_multicast_loop;    /* 1 >= hear sends if a member */
           LIST_HEAD(, in6_multi_mship) im6o_memberships;
   };
   
   /*
    * Control options for outgoing packets
    */
   
   /* Routing header related info */
   struct  ip6po_rhinfo {
           struct  ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
           struct  route_in6 ip6po_rhi_route; /* Route to the 1st hop */
   };
   #define ip6po_rthdr     ip6po_rhinfo.ip6po_rhi_rthdr
   #define ip6po_route     ip6po_rhinfo.ip6po_rhi_route
   
   struct  ip6_pktopts {
           struct  mbuf *ip6po_m;  /* Pointer to mbuf storing the data */
           int     ip6po_hlim;             /* Hoplimit for outgoing packets */
           struct  in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */
           struct  sockaddr *ip6po_nexthop;        /* Next-hop address */
           struct  ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
           struct  ip6_dest *ip6po_dest1; /* Destination options header(1st part) */
           struct  ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */
           struct  ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */
   };
   
   struct  ip6stat {
           u_quad_t ip6s_total;            /* total packets received */
           u_quad_t ip6s_tooshort;         /* packet too short */
           u_quad_t ip6s_toosmall;         /* not enough data */
           u_quad_t ip6s_fragments;        /* fragments received */
           u_quad_t ip6s_fragdropped;      /* frags dropped(dups, out of space) */
           u_quad_t ip6s_fragtimeout;      /* fragments timed out */
           u_quad_t ip6s_fragoverflow;     /* fragments that exceeded limit */
           u_quad_t ip6s_forward;          /* packets forwarded */
           u_quad_t ip6s_cantforward;      /* packets rcvd for unreachable dest */
           u_quad_t ip6s_redirectsent;     /* packets forwarded on same net */
           u_quad_t ip6s_delivered;        /* datagrams delivered to upper level*/
           u_quad_t ip6s_localout;         /* total ip packets generated here */
           u_quad_t ip6s_odropped;         /* lost packets due to nobufs, etc. */
           u_quad_t ip6s_reassembled;      /* total packets reassembled ok */
           u_quad_t ip6s_fragmented;       /* datagrams successfully fragmented */
           u_quad_t ip6s_ofragments;       /* output fragments created */
           u_quad_t ip6s_cantfrag;         /* don't fragment flag was set, etc. */
           u_quad_t ip6s_badoptions;       /* error in option processing */
           u_quad_t ip6s_noroute;          /* packets discarded due to no route */
           u_quad_t ip6s_badvers;          /* ip6 version != 6 */
           u_quad_t ip6s_rawout;           /* total raw ip packets generated */
           u_quad_t ip6s_badscope;         /* scope error */
           u_quad_t ip6s_notmember;        /* don't join this multicast group */
           u_quad_t ip6s_nxthist[256];     /* next header history */
           u_quad_t ip6s_m1;               /* one mbuf */
           u_quad_t ip6s_m2m[32];          /* two or more mbuf */
           u_quad_t ip6s_mext1;            /* one ext mbuf */
           u_quad_t ip6s_mext2m;           /* two or more ext mbuf */
           u_quad_t ip6s_exthdrtoolong;    /* ext hdr are not continuous */
           u_quad_t ip6s_nogif;            /* no match gif found */
           u_quad_t ip6s_toomanyhdr;       /* discarded due to too many headers */
   
           /*
            * statistics for improvement of the source address selection
            * algorithm:
            * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
            */
           /* number of times that address selection fails */
           u_quad_t ip6s_sources_none;
           /* number of times that an address on the outgoing I/F is chosen */
           u_quad_t ip6s_sources_sameif[16];
           /* number of times that an address on a non-outgoing I/F is chosen */
           u_quad_t ip6s_sources_otherif[16];
           /*
            * number of times that an address that has the same scope
            * from the destination is chosen.
            */
           u_quad_t ip6s_sources_samescope[16];
           /*
            * number of times that an address that has a different scope
            * from the destination is chosen.
            */
           u_quad_t ip6s_sources_otherscope[16];
           /* number of times that an deprecated address is chosen */
           u_quad_t ip6s_sources_deprecated[16];
   
           u_quad_t ip6s_forward_cachehit;
           u_quad_t ip6s_forward_cachemiss;
   };
   
   #ifdef _KERNEL
   /* flags passed to ip6_output as last parameter */
   #define IPV6_UNSPECSRC          0x01    /* allow :: as the source address */
   #define IPV6_FORWARDING         0x02    /* most of IPv6 header exists */
   #define IPV6_MINMTU             0x04    /* use minimum MTU (IPV6_USE_MIN_MTU) */
   
   #ifdef __NO_STRICT_ALIGNMENT
   #define IP6_HDR_ALIGNED_P(ip)   1
   #else
   #define IP6_HDR_ALIGNED_P(ip)   ((((vaddr_t) (ip)) & 3) == 0)
   #endif
   
   extern struct   ip6stat ip6stat;        /* statistics */
   extern u_int32_t ip6_id;                /* fragment identifier */
   extern int      ip6_defhlim;            /* default hop limit */
   extern int      ip6_defmcasthlim;       /* default multicast hop limit */
   extern int      ip6_forwarding;         /* act as router? */
   extern int      ip6_sendredirect;       /* send ICMPv6 redirect? */
   extern int      ip6_forward_srcrt;      /* forward src-routed? */
   extern int      ip6_use_deprecated;     /* allow deprecated addr as source */
   extern int      ip6_rr_prune;           /* router renumbering prefix
                                            * walk list every 5 sec.    */
   extern int      ip6_v6only;
   
   extern struct socket *ip6_mrouter;      /* multicast routing daemon */
   extern int      ip6_sendredirects;      /* send IP redirects when forwarding? */
   extern int      ip6_maxfragpackets; /* Maximum packets in reassembly queue */
   extern int      ip6_maxfrags;   /* Maximum fragments in reassembly queue */
   extern int      ip6_sourcecheck;        /* Verify source interface */
   extern int      ip6_sourcecheck_interval; /* Interval between log messages */
   extern int      ip6_accept_rtadv;       /* Acts as a host not a router */
   extern int      ip6_keepfaith;          /* Firewall Aided Internet Translator */
   extern int      ip6_log_interval;
   extern time_t   ip6_log_time;
   extern int      ip6_hdrnestlimit; /* upper limit of # of extension headers */
   extern int      ip6_dad_count;          /* DupAddrDetectionTransmits */
   
   extern u_int32_t ip6_flow_seq;
   extern int ip6_auto_flowlabel;
   extern int ip6_auto_linklocal;
   
   extern int   ip6_anonportmin;           /* minimum ephemeral port */
   extern int   ip6_anonportmax;           /* maximum ephemeral port */
   extern int   ip6_lowportmin;            /* minimum reserved port */
   extern int   ip6_lowportmax;            /* maximum reserved port */
   
   extern int      ip6_rht0;               /* processing routing header type 0 */
   
   
   struct in6pcb;
   
   int     icmp6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
   
   void    ip6_init __P((void));
   void    ip6intr __P((void));
   void    ip6_input __P((struct mbuf *));
   void    ip6_freemoptions __P((struct ip6_moptions *));
   int     ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
   u_int8_t *ip6_get_prevhdr __P((struct mbuf *, int));
   int     ip6_nexthdr __P((struct mbuf *, int, int, int *));
   int     ip6_lasthdr __P((struct mbuf *, int, int, int *));
   int     ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));
   int     ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
                                    u_int32_t *));
   void    ip6_savecontrol __P((struct in6pcb *, struct mbuf **, struct ip6_hdr *,
                   struct mbuf *));
   int     ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
   
   void    ip6_forward __P((struct mbuf *, int));
   
   void    ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
   int     ip6_output __P((struct mbuf *, struct ip6_pktopts *,
                           struct route_in6 *, int,
                           struct ip6_moptions *, struct socket *,
                           struct ifnet **));
   int     ip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
   int     ip6_raw_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
   int     ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, int));
   int     ip6_optlen __P((struct in6pcb *));
   
   int     route6_input __P((struct mbuf **, int *, int));
   
   void    frag6_init __P((void));
   int     frag6_input __P((struct mbuf **, int *, int));
   void    frag6_slowtimo __P((void));
   void    frag6_drain __P((void));
   
   void    rip6_init __P((void));
   int     rip6_input __P((struct mbuf **, int *, int));
   void    rip6_ctlinput __P((int, struct sockaddr *, void *));
   int     rip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
   int     rip6_output __P((struct mbuf *, ...));
   int     rip6_usrreq __P((struct socket *,
               int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *));
   
   int     dest6_input __P((struct mbuf **, int *, int));
   int     none_input __P((struct mbuf **, int *, int));
   
   struct  in6_addr *in6_selectsrc __P((struct sockaddr_in6 *,
           struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *,
           struct in6_addr *, int *));
   
   u_int32_t ip6_randomid __P((void));
   u_int32_t ip6_randomflowlabel __P((void));
   #endif /* _KERNEL */
   
   #endif /* !_NETINET6_IP6_VAR_H_ */

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