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

     /*      $OpenBSD: ip6_var.h,v 1.106 2022/11/12 02:49:34 kn 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 {
            TAILQ_ENTRY(ip6q) ip6q_queue;
            LIST_HEAD(ip6asfrag_list, ip6asfrag) ip6q_asfrag;
            struct in6_addr ip6q_src, ip6q_dst;
            int             ip6q_unfrglen;  /* len of unfragmentable part */
            int             ip6q_nfrag;     /* # of fragments */
            u_int32_t       ip6q_ident;     /* fragment identification */
            u_int8_t        ip6q_nxt;       /* ip6f_nxt in first fragment */
            u_int8_t        ip6q_ecn;
            u_int8_t        ip6q_ttl;       /* time to live in slowtimo units */
    };
    
    struct  ip6asfrag {
            LIST_ENTRY(ip6asfrag) ip6af_list;
            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 */
    };
    
    struct  ip6_moptions {
            LIST_HEAD(, in6_multi_mship) im6o_memberships;
            unsigned short im6o_ifidx;      /* ifp index for outgoing multicasts */
            u_char  im6o_hlim;      /* hoplimit for outgoing multicasts */
            u_char  im6o_loop;      /* 1 >= hear sends if a member */
    };
    
    /*
    * 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 {
           /* Hoplimit for outgoing packets */
           int     ip6po_hlim;
   
           /* Outgoing IF/address information */
           struct in6_pktinfo *ip6po_pktinfo;
   
           /* Hop-by-Hop options header */
           struct  ip6_hbh *ip6po_hbh;
   
           /* Destination options header (before a routing header) */
           struct  ip6_dest *ip6po_dest1;
   
           /* Routing header related info. */
           struct  ip6po_rhinfo ip6po_rhinfo;
   
           /* Destination options header (after a routing header) */
           struct  ip6_dest *ip6po_dest2;
   
           /* traffic class */
           int     ip6po_tclass;
   
           /* fragment vs PMTU discovery policy */
           int     ip6po_minmtu;
   #define IP6PO_MINMTU_MCASTONLY  -1 /* default: send at min MTU for multicast */
   #define IP6PO_MINMTU_DISABLE    0  /* always perform pmtu disc */
   #define IP6PO_MINMTU_ALL        1  /* always send at min MTU */
   
           int     ip6po_flags;
   #define IP6PO_DONTFRAG  0x04    /* disable fragmentation (IPV6_DONTFRAG) */
   };
   
   struct  ip6stat {
           u_int64_t ip6s_total;           /* total packets received */
           u_int64_t ip6s_tooshort;        /* packet too short */
           u_int64_t ip6s_toosmall;        /* not enough data */
           u_int64_t ip6s_fragments;       /* fragments received */
           u_int64_t ip6s_fragdropped;     /* frags dropped(dups, out of space) */
           u_int64_t ip6s_fragtimeout;     /* fragments timed out */
           u_int64_t ip6s_fragoverflow;    /* fragments that exceeded limit */
           u_int64_t ip6s_forward;         /* packets forwarded */
           u_int64_t ip6s_cantforward;     /* packets rcvd for unreachable dest */
           u_int64_t ip6s_redirectsent;    /* packets forwarded on same net */
           u_int64_t ip6s_delivered;       /* datagrams delivered to upper level*/
           u_int64_t ip6s_localout;        /* total ip packets generated here */
           u_int64_t ip6s_odropped;        /* lost output due to nobufs, etc. */
           u_int64_t ip6s_reassembled;     /* total packets reassembled ok */
           u_int64_t ip6s_fragmented;      /* datagrams successfully fragmented */
           u_int64_t ip6s_ofragments;      /* output fragments created */
           u_int64_t ip6s_cantfrag;        /* don't fragment flag was set, etc. */
           u_int64_t ip6s_badoptions;      /* error in option processing */
           u_int64_t ip6s_noroute;         /* packets discarded due to no route */
           u_int64_t ip6s_badvers;         /* ip6 version != 6 */
           u_int64_t ip6s_rawout;          /* total raw ip packets generated */
           u_int64_t ip6s_badscope;        /* scope error */
           u_int64_t ip6s_notmember;       /* don't join this multicast group */
           u_int64_t ip6s_nxthist[256];    /* next header history */
           u_int64_t ip6s_m1;              /* one mbuf */
           u_int64_t ip6s_m2m[32];         /* two or more mbuf */
           u_int64_t ip6s_mext1;           /* one ext mbuf */
           u_int64_t ip6s_mext2m;          /* two or more ext mbuf */
           u_int64_t ip6s_nogif;           /* no match gif found */
           u_int64_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_int64_t ip6s_sources_none;
           /* number of times that an address on the outgoing I/F is chosen */
           u_int64_t ip6s_sources_sameif[16];
           /* number of times that an address on a non-outgoing I/F is chosen */
           u_int64_t ip6s_sources_otherif[16];
           /*
            * number of times that an address that has the same scope
            * from the destination is chosen.
            */
           u_int64_t ip6s_sources_samescope[16];
           /*
            * number of times that an address that has a different scope
            * from the destination is chosen.
            */
           u_int64_t ip6s_sources_otherscope[16];
           /* number of times that an deprecated address is chosen */
           u_int64_t ip6s_sources_deprecated[16];
   
           u_int64_t ip6s_forward_cachehit;
           u_int64_t ip6s_forward_cachemiss;
           u_int64_t ip6s_wrongif;         /* packet received on wrong interface */
           u_int64_t ip6s_idropped;        /* lost input due to nobufs, etc. */
   };
   
   #ifdef _KERNEL
   
   #include <sys/percpu.h>
   
   enum ip6stat_counters {
           ip6s_total,
           ip6s_tooshort,
           ip6s_toosmall,
           ip6s_fragments,
           ip6s_fragdropped,
           ip6s_fragtimeout,
           ip6s_fragoverflow,
           ip6s_forward,
           ip6s_cantforward,
           ip6s_redirectsent,
           ip6s_delivered,
           ip6s_localout,
           ip6s_odropped,
           ip6s_reassembled,
           ip6s_fragmented,
           ip6s_ofragments,
           ip6s_cantfrag,
           ip6s_badoptions,
           ip6s_noroute,
           ip6s_badvers,
           ip6s_rawout,
           ip6s_badscope,
           ip6s_notmember,
           ip6s_nxthist,
           ip6s_m1 = ip6s_nxthist + 256,
           ip6s_m2m,
           ip6s_mext1 = ip6s_m2m + 32,
           ip6s_mext2m,
           ip6s_nogif,
           ip6s_toomanyhdr,
           ip6s_sources_none,
           ip6s_sources_sameif,
           ip6s_sources_otherif = ip6s_sources_sameif + 16,
           ip6s_sources_samescope = ip6s_sources_otherif + 16,
           ip6s_sources_otherscope = ip6s_sources_samescope + 16,
           ip6s_sources_deprecated = ip6s_sources_otherscope + 16,
           ip6s_forward_cachehit = ip6s_sources_deprecated + 16,
           ip6s_forward_cachemiss,
           ip6s_wrongif,
           ip6s_idropped,
   
           ip6s_ncounters,
   };
   
   extern struct cpumem *ip6counters;
   
   static inline void
   ip6stat_inc(enum ip6stat_counters c)
   {
           counters_inc(ip6counters, c);
   }
   
   static inline void
   ip6stat_add(enum ip6stat_counters c, uint64_t v)
   {
           counters_add(ip6counters, c, v);
   }
   
   /* 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) */
   
   extern int ip6_mtudisc_timeout;         /* mtu discovery */
   extern struct rttimer_queue icmp6_mtudisc_timeout_q;
   
   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_mforwarding;        /* act as multicast router? */
   extern int      ip6_multipath;          /* use multipath routes */
   extern int      ip6_sendredirect;       /* send ICMPv6 redirect? */
   extern int      ip6_use_deprecated;     /* allow deprecated addr as source */
   extern int      ip6_mcast_pmtu;         /* path MTU discovery for multicast */
   extern int      ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */
   extern int      ip6_maxdynroutes; /* Max # of routes created via redirect */
   
   extern struct socket *ip6_mrouter[RT_TABLEID_MAX + 1]; /* 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_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 int      ip6_dad_pending;        /* number of currently running DADs */
   
   extern int ip6_auto_flowlabel;
   
   #define IP6_SOIIKEY_LEN 16
   extern uint8_t  ip6_soiikey[IP6_SOIIKEY_LEN];
   
   extern const struct pr_usrreqs rip6_usrreqs;
   
   struct in6pcb;
   struct inpcb;
   
   int     icmp6_ctloutput(int, struct socket *, int, int, struct mbuf *);
   
   void    ip6_init(void);
   void    ip6intr(void);
   int     ip6_input_if(struct mbuf **, int *, int, int, struct ifnet *);
   void    ip6_freepcbopts(struct ip6_pktopts *);
   void    ip6_freemoptions(struct ip6_moptions *);
   int     ip6_unknown_opt(struct mbuf **, u_int8_t *, int);
   int     ip6_get_prevhdr(struct mbuf *, int);
   int     ip6_nexthdr(struct mbuf *, int, int, int *);
   int     ip6_lasthdr(struct mbuf *, int, int, int *);
   int     ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
   int     ip6_process_hopopts(struct mbuf **, u_int8_t *, int, u_int32_t *,
                u_int32_t *);
   void    ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
   int     ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
   
   void    ip6_forward(struct mbuf *, struct rtentry *, int);
   
   void    ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
   int     ip6_output(struct mbuf *, struct ip6_pktopts *, struct route_in6 *, int,
               struct ip6_moptions *, struct inpcb *);
   int     ip6_fragment(struct mbuf *, struct mbuf_list *, int, u_char, u_long);
   int     ip6_ctloutput(int, struct socket *, int, int, struct mbuf *);
   int     ip6_raw_ctloutput(int, struct socket *, int, int, struct mbuf *);
   void    ip6_initpktopts(struct ip6_pktopts *);
   int     ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
               struct ip6_pktopts *, int, int);
   void    ip6_clearpktopts(struct ip6_pktopts *, int);
   void    ip6_randomid_init(void);
   u_int32_t ip6_randomid(void);
   void    ip6_send(struct mbuf *);
   
   int     route6_input(struct mbuf **, int *, int, int);
   
   void    frag6_init(void);
   int     frag6_input(struct mbuf **, int *, int, int);
   int     frag6_deletefraghdr(struct mbuf *, int);
   void    frag6_slowtimo(void);
   
   void    rip6_init(void);
   int     rip6_input(struct mbuf **, int *, int, int);
   void    rip6_ctlinput(int, struct sockaddr *, u_int, void *);
   int     rip6_ctloutput(int, struct socket *, int, int, struct mbuf *);
   int     rip6_output(struct mbuf *, struct socket *, struct sockaddr *,
               struct mbuf *);
   int     rip6_attach(struct socket *, int, int);
   int     rip6_detach(struct socket *);
   void    rip6_lock(struct socket *);
   void    rip6_unlock(struct socket *);
   int     rip6_bind(struct socket *, struct mbuf *, struct proc *);
   int     rip6_connect(struct socket *, struct mbuf *);
   int     rip6_disconnect(struct socket *);
   int     rip6_shutdown(struct socket *);
   int     rip6_send(struct socket *, struct mbuf *, struct mbuf *,
               struct mbuf *);
   int     rip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
   
   int     dest6_input(struct mbuf **, int *, int, int);
   int     none_input(struct mbuf **, int *, int);
   
   int     in6_pcbselsrc(struct in6_addr **, struct sockaddr_in6 *,
               struct inpcb *, struct ip6_pktopts *);
   int     in6_selectsrc(struct in6_addr **, struct sockaddr_in6 *,
               struct ip6_moptions *, unsigned int);
   struct rtentry *in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
               struct route_in6 *, unsigned int rtableid);
   
   u_int32_t ip6_randomflowlabel(void);
   
   #ifdef IPSEC
   struct tdb;
   int     ip6_output_ipsec_lookup(struct mbuf *, struct inpcb *, struct tdb **);
   int     ip6_output_ipsec_send(struct tdb *, struct mbuf *, struct route_in6 *,
               int, int);
   #endif /* IPSEC */
   
   #endif /* _KERNEL */
   
   #endif /* !_NETINET6_IP6_VAR_H_ */

Cache object: a2937e4c8dfc1884fec8781916cd6899