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ip6_var.h revision 1.94
      1  1.94    andvar /*	$NetBSD: ip6_var.h,v 1.94 2024/02/09 22:08:37 andvar Exp $	*/
      2  1.13    itojun /*	$KAME: ip6_var.h,v 1.33 2000/06/11 14:59:20 jinmei Exp $	*/
      3   1.3   thorpej 
      4   1.2    itojun /*
      5   1.2    itojun  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      6   1.2    itojun  * All rights reserved.
      7  1.13    itojun  *
      8   1.2    itojun  * Redistribution and use in source and binary forms, with or without
      9   1.2    itojun  * modification, are permitted provided that the following conditions
     10   1.2    itojun  * are met:
     11   1.2    itojun  * 1. Redistributions of source code must retain the above copyright
     12   1.2    itojun  *    notice, this list of conditions and the following disclaimer.
     13   1.2    itojun  * 2. Redistributions in binary form must reproduce the above copyright
     14   1.2    itojun  *    notice, this list of conditions and the following disclaimer in the
     15   1.2    itojun  *    documentation and/or other materials provided with the distribution.
     16   1.2    itojun  * 3. Neither the name of the project nor the names of its contributors
     17   1.2    itojun  *    may be used to endorse or promote products derived from this software
     18   1.2    itojun  *    without specific prior written permission.
     19  1.13    itojun  *
     20   1.2    itojun  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     21   1.2    itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     22   1.2    itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     23   1.2    itojun  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     24   1.2    itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     25   1.2    itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     26   1.2    itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27   1.2    itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     28   1.2    itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29   1.2    itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30   1.2    itojun  * SUCH DAMAGE.
     31   1.2    itojun  */
     32   1.2    itojun 
     33   1.2    itojun /*
     34   1.2    itojun  * Copyright (c) 1982, 1986, 1993
     35   1.2    itojun  *	The Regents of the University of California.  All rights reserved.
     36   1.2    itojun  *
     37   1.2    itojun  * Redistribution and use in source and binary forms, with or without
     38   1.2    itojun  * modification, are permitted provided that the following conditions
     39   1.2    itojun  * are met:
     40   1.2    itojun  * 1. Redistributions of source code must retain the above copyright
     41   1.2    itojun  *    notice, this list of conditions and the following disclaimer.
     42   1.2    itojun  * 2. Redistributions in binary form must reproduce the above copyright
     43   1.2    itojun  *    notice, this list of conditions and the following disclaimer in the
     44   1.2    itojun  *    documentation and/or other materials provided with the distribution.
     45  1.29       agc  * 3. Neither the name of the University nor the names of its contributors
     46   1.2    itojun  *    may be used to endorse or promote products derived from this software
     47   1.2    itojun  *    without specific prior written permission.
     48   1.2    itojun  *
     49   1.2    itojun  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     50   1.2    itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     51   1.2    itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     52   1.2    itojun  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     53   1.2    itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     54   1.2    itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     55   1.2    itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     56   1.2    itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     57   1.2    itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     58   1.2    itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     59   1.2    itojun  * SUCH DAMAGE.
     60   1.2    itojun  *
     61   1.2    itojun  *	@(#)ip_var.h	8.1 (Berkeley) 6/10/93
     62   1.2    itojun  */
     63   1.2    itojun 
     64   1.2    itojun #ifndef _NETINET6_IP6_VAR_H_
     65   1.2    itojun #define _NETINET6_IP6_VAR_H_
     66   1.2    itojun 
     67  1.88  christos #include <sys/types.h>
     68  1.88  christos #include <sys/queue.h>
     69  1.51    plunky #include <sys/socketvar.h>
     70  1.88  christos 
     71  1.88  christos #include <net/if.h>
     72  1.43    dyoung #include <net/route.h>
     73  1.43    dyoung 
     74  1.88  christos #include <netinet/in.h>
     75  1.88  christos #include <netinet/ip6.h>
     76  1.88  christos 
     77   1.2    itojun struct	ip6_moptions {
     78  1.66     ozaki 	if_index_t im6o_multicast_if_index; /* I/F for outgoing multicasts */
     79   1.2    itojun 	u_char	im6o_multicast_hlim;	/* hoplimit for outgoing multicasts */
     80   1.2    itojun 	u_char	im6o_multicast_loop;	/* 1 >= hear sends if a member */
     81   1.2    itojun 	LIST_HEAD(, in6_multi_mship) im6o_memberships;
     82   1.2    itojun };
     83   1.2    itojun 
     84   1.2    itojun /*
     85   1.2    itojun  * Control options for outgoing packets
     86   1.2    itojun  */
     87   1.2    itojun 
     88   1.2    itojun /* Routing header related info */
     89   1.2    itojun struct	ip6po_rhinfo {
     90   1.2    itojun 	struct	ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
     91  1.43    dyoung 	struct	route ip6po_rhi_route; /* Route to the 1st hop */
     92   1.2    itojun };
     93   1.2    itojun #define ip6po_rthdr	ip6po_rhinfo.ip6po_rhi_rthdr
     94   1.2    itojun #define ip6po_route	ip6po_rhinfo.ip6po_rhi_route
     95   1.2    itojun 
     96  1.37    rpaulo /* Nexthop related info */
     97  1.37    rpaulo struct	ip6po_nhinfo {
     98  1.37    rpaulo 	struct	sockaddr *ip6po_nhi_nexthop;
     99  1.43    dyoung 	struct	route ip6po_nhi_route; /* Route to the nexthop */
    100  1.37    rpaulo };
    101  1.37    rpaulo #define ip6po_nexthop	ip6po_nhinfo.ip6po_nhi_nexthop
    102  1.37    rpaulo #define ip6po_nextroute	ip6po_nhinfo.ip6po_nhi_route
    103  1.37    rpaulo 
    104   1.2    itojun struct	ip6_pktopts {
    105   1.2    itojun 	int	ip6po_hlim;		/* Hoplimit for outgoing packets */
    106   1.2    itojun 	struct	in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */
    107  1.37    rpaulo 	struct	ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */
    108   1.2    itojun 	struct	ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
    109   1.2    itojun 	struct	ip6_dest *ip6po_dest1; /* Destination options header(1st part) */
    110   1.2    itojun 	struct	ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */
    111   1.2    itojun 	struct	ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */
    112  1.37    rpaulo 	int	ip6po_tclass;	/* traffic class */
    113  1.37    rpaulo 	int	ip6po_minmtu;  /* fragment vs PMTU discovery policy */
    114  1.37    rpaulo #define IP6PO_MINMTU_MCASTONLY	-1 /* default; send at min MTU for multicast*/
    115  1.37    rpaulo #define IP6PO_MINMTU_DISABLE	 0 /* always perform pmtu disc */
    116  1.37    rpaulo #define IP6PO_MINMTU_ALL	 1 /* always send at min MTU */
    117  1.64       roy 	int	ip6po_prefer_tempaddr;	/* whether temporary addresses are
    118  1.64       roy 					 * preferred as source address */
    119  1.64       roy #define IP6PO_TEMPADDR_SYSTEM	-1 /* follow the system default */
    120  1.64       roy #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
    121  1.64       roy #define IP6PO_TEMPADDR_PREFER	 1 /* prefer temporary address */
    122  1.37    rpaulo 	int ip6po_flags;
    123  1.37    rpaulo #if 0	/* parameters in this block is obsolete. do not reuse the values. */
    124  1.37    rpaulo #define IP6PO_REACHCONF	0x01	/* upper-layer reachability confirmation. */
    125  1.37    rpaulo #define IP6PO_MINMTU	0x02	/* use minimum MTU (IPV6_USE_MIN_MTU) */
    126  1.37    rpaulo #endif
    127  1.37    rpaulo #define IP6PO_DONTFRAG	0x04	/* disable fragmentation (IPV6_DONTFRAG) */
    128   1.2    itojun };
    129   1.2    itojun 
    130  1.48   thorpej /*
    131  1.48   thorpej  * IPv6 statistics.
    132  1.48   thorpej  * Each counter is an unsigned 64-bit value.
    133  1.48   thorpej  */
    134  1.48   thorpej #define	IP6_STAT_TOTAL		0	/* total packets received */
    135  1.48   thorpej #define	IP6_STAT_TOOSHORT	1	/* packet too short */
    136  1.48   thorpej #define	IP6_STAT_TOOSMALL	2	/* not enough data */
    137  1.48   thorpej #define	IP6_STAT_FRAGMENTS	3	/* fragments received */
    138  1.48   thorpej #define	IP6_STAT_FRAGDROPPED	4	/* frags dropped (dups, out of space) */
    139  1.48   thorpej #define	IP6_STAT_FRAGTIMEOUT	5	/* fragments timed out */
    140  1.48   thorpej #define	IP6_STAT_FRAGOVERFLOW	6	/* fragments that exceed limit */
    141  1.48   thorpej #define IP6_STAT_FORWARD	7	/* packets forwarded */
    142  1.48   thorpej #define	IP6_STAT_CANTFORWARD	8	/* packets rcvd for uncreachable dst */
    143  1.48   thorpej #define	IP6_STAT_REDIRECTSENT	9	/* packets forwarded on same net */
    144  1.48   thorpej #define	IP6_STAT_DELIVERED	10	/* datagrams delivered to upper level */
    145  1.48   thorpej #define	IP6_STAT_LOCALOUT	11	/* total IP packets generated here */
    146  1.48   thorpej #define	IP6_STAT_ODROPPED	12	/* lost packets due to nobufs, etc. */
    147  1.48   thorpej #define	IP6_STAT_REASSEMBLED	13	/* total packets reassembled ok */
    148  1.48   thorpej #define	IP6_STAT_FRAGMENTED	14	/* datagrams successfully fragmented */
    149  1.48   thorpej #define	IP6_STAT_OFRAGMENTS	15	/* output fragments created */
    150  1.48   thorpej #define	IP6_STAT_CANTFRAG	16	/* don't fragment flag was set, etc. */
    151  1.48   thorpej #define	IP6_STAT_BADOPTIONS	17	/* error in option processing */
    152  1.48   thorpej #define	IP6_STAT_NOROUTE	18	/* packets discarded due to no route */
    153  1.48   thorpej #define	IP6_STAT_BADVERS	19	/* ip6 version != 6 */
    154  1.48   thorpej #define	IP6_STAT_RAWOUT		20	/* total raw ip packets generated */
    155  1.48   thorpej #define	IP6_STAT_BADSCOPE	21	/* scope error */
    156  1.48   thorpej #define	IP6_STAT_NOTMEMBER	22	/* don't join this multicast group */
    157  1.48   thorpej #define	IP6_STAT_NXTHIST	23	/* next header histogram */
    158  1.48   thorpej 		/* space for 256 counters */
    159  1.48   thorpej #define	IP6_STAT_M1		279	/* one mbuf */
    160  1.48   thorpej #define	IP6_STAT_M2M		280	/* two or more mbuf */
    161  1.48   thorpej 		/* space for 32 counters */
    162  1.48   thorpej #define	IP6_STAT_MEXT1		312	/* one ext mbuf */
    163  1.48   thorpej #define	IP6_STAT_MEXT2M		313	/* two or more ext mbuf */
    164  1.48   thorpej #define	IP6_STAT_EXTHDRTOOLONG	314	/* ext hdr are not contiguous */
    165  1.48   thorpej #define	IP6_STAT_NOGIF		315	/* no match gif found */
    166  1.48   thorpej #define	IP6_STAT_TOOMANYHDR	316	/* discarded due to too many headers */
    167  1.10    itojun 	/*
    168  1.10    itojun 	 * statistics for improvement of the source address selection
    169  1.10    itojun 	 * algorithm:
    170  1.10    itojun 	 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
    171  1.10    itojun 	 */
    172  1.48   thorpej #define	IP6_STAT_SOURCES_NONE	317	/* number of times that address
    173  1.48   thorpej 					   selection fails */
    174  1.48   thorpej #define	IP6_STAT_SOURCES_SAMEIF	318	/* number of times that an address
    175  1.48   thorpej 					   on the outgoing I/F is chosen */
    176  1.48   thorpej 		/* space for 16 counters */
    177  1.48   thorpej #define	IP6_STAT_SOURCES_OTHERIF 334	/* number of times that an address on
    178  1.48   thorpej 					   a non-outgoing I/F is chosen */
    179  1.48   thorpej 		/* space for 16 counters */
    180  1.48   thorpej #define	IP6_STAT_SOURCES_SAMESCOPE 350	/* number of times that an address that
    181  1.48   thorpej 					   has the same scope from the dest.
    182  1.48   thorpej 					   is chosen */
    183  1.48   thorpej 		/* space for 16 counters */
    184  1.48   thorpej #define	IP6_STAT_SOURCES_OTHERSCOPE 366	/* number of times that an address that
    185  1.48   thorpej 					   has a different scope from the dest.
    186  1.48   thorpej 					   is chosen */
    187  1.48   thorpej 		/* space for 16 counters */
    188  1.48   thorpej #define	IP6_STAT_SOURCES_DEPRECATED 382	/* number of times that a deprecated
    189  1.48   thorpej 					   address is chosen */
    190  1.48   thorpej 		/* space for 16 counters */
    191  1.48   thorpej #define	IP6_STAT_FORWARD_CACHEHIT 398
    192  1.48   thorpej #define	IP6_STAT_FORWARD_CACHEMISS 399
    193  1.48   thorpej #define	IP6_STAT_FASTFORWARD	400	/* packets fast forwarded */
    194  1.48   thorpej #define	IP6_STAT_FASTFORWARDFLOWS 401	/* number of fast forward flows */
    195  1.75  knakahar #define	IP6_STAT_NOIPSEC	402	/* no match ipsec(4) found */
    196  1.82     ozaki #define	IP6_STAT_PFILDROP_IN	403	/* dropped by pfil (PFIL_IN) */
    197  1.82     ozaki #define	IP6_STAT_PFILDROP_OUT	404	/* dropped by pfil (PFIL_OUT) */
    198  1.85     ozaki #define	IP6_STAT_IPSECDROP_IN	405	/* dropped by IPsec SP check */
    199  1.85     ozaki #define	IP6_STAT_IPSECDROP_OUT	406	/* dropped by IPsec SP check */
    200  1.91    andvar #define	IP6_STAT_IFDROP		407	/* dropped due to interface state */
    201  1.87     ozaki #define	IP6_STAT_IDROPPED	408	/* lost packets due to nobufs, etc. */
    202  1.87     ozaki #define	IP6_STAT_TIMXCEED	409	/* hop limit exceeded */
    203  1.87     ozaki #define	IP6_STAT_TOOBIG		410	/* packet bigger than MTU */
    204  1.87     ozaki #define	IP6_STAT_RTREJECT	411	/* rejected by route */
    205  1.13    itojun 
    206  1.87     ozaki #define	IP6_NSTATS		412
    207  1.39  liamjfoy 
    208  1.39  liamjfoy #define IP6FLOW_HASHBITS         6 /* should not be a multiple of 8 */
    209  1.39  liamjfoy 
    210  1.39  liamjfoy /*
    211  1.39  liamjfoy  * Structure for an IPv6 flow (ip6_fastforward).
    212  1.39  liamjfoy  */
    213  1.39  liamjfoy struct ip6flow {
    214  1.68  knakahar 	TAILQ_ENTRY(ip6flow) ip6f_list;  /* next in active list */
    215  1.68  knakahar 	TAILQ_ENTRY(ip6flow) ip6f_hash;  /* next ip6flow in bucket */
    216  1.68  knakahar 	size_t ip6f_hashidx;             /* own hash index of ipflowtable[] */
    217  1.39  liamjfoy 	struct in6_addr ip6f_dst;       /* destination address */
    218  1.39  liamjfoy 	struct in6_addr ip6f_src;       /* source address */
    219  1.43    dyoung 	struct route ip6f_ro;       /* associated route entry */
    220  1.39  liamjfoy 	u_int32_t ip6f_flow;		/* flow (tos) */
    221  1.39  liamjfoy 	u_quad_t ip6f_uses;               /* number of uses in this period */
    222  1.39  liamjfoy 	u_quad_t ip6f_last_uses;          /* number of uses in last period */
    223  1.39  liamjfoy 	u_quad_t ip6f_dropped;            /* ENOBUFS returned by if_output */
    224  1.39  liamjfoy 	u_quad_t ip6f_forwarded;          /* packets forwarded */
    225  1.39  liamjfoy 	u_int ip6f_timer;               /* lifetime timer */
    226   1.2    itojun };
    227   1.2    itojun 
    228   1.2    itojun #ifdef _KERNEL
    229  1.88  christos 
    230  1.88  christos #include <sys/protosw.h>
    231  1.89  christos #include <sys/cprng.h>
    232  1.88  christos 
    233  1.35    rpaulo /*
    234  1.35    rpaulo  * Auxiliary attributes of incoming IPv6 packets, which is initialized when we
    235  1.35    rpaulo  * come into ip6_input().
    236  1.35    rpaulo  * XXX do not make it a kitchen sink!
    237  1.35    rpaulo  */
    238  1.35    rpaulo struct ip6aux {
    239  1.35    rpaulo 	/* ip6.ip6_dst */
    240  1.46    dyoung 	struct in6_addr	ip6a_src;
    241  1.46    dyoung 	uint32_t	ip6a_scope_id;
    242  1.46    dyoung 	int		ip6a_flags;
    243  1.35    rpaulo };
    244  1.35    rpaulo 
    245   1.2    itojun /* flags passed to ip6_output as last parameter */
    246  1.21    itojun #define	IPV6_UNSPECSRC		0x01	/* allow :: as the source address */
    247   1.2    itojun #define	IPV6_FORWARDING		0x02	/* most of IPv6 header exists */
    248  1.17    itojun #define	IPV6_MINMTU		0x04	/* use minimum MTU (IPV6_USE_MIN_MTU) */
    249  1.22   thorpej 
    250   1.4    itojun extern u_int32_t ip6_id;		/* fragment identifier */
    251   1.2    itojun extern int	ip6_defhlim;		/* default hop limit */
    252   1.2    itojun extern int	ip6_defmcasthlim;	/* default multicast hop limit */
    253   1.2    itojun extern int	ip6_forwarding;		/* act as router? */
    254  1.28    itojun extern int	ip6_sendredirect;	/* send ICMPv6 redirect? */
    255   1.6    itojun extern int	ip6_use_deprecated;	/* allow deprecated addr as source */
    256  1.36    rpaulo extern int	ip6_mcast_pmtu;		/* enable pMTU discovery for multicast? */
    257  1.16    itojun extern int	ip6_v6only;
    258  1.59  christos extern int	ip6_neighborgcthresh;	/* Threshold # of NDP entries for GC */
    259  1.59  christos extern int	ip6_maxdynroutes; /* Max # of routes created via redirect */
    260  1.94    andvar extern int	ip6_param_rt_msg;  /* How to send parameter changing rtm */
    261  1.59  christos 
    262   1.6    itojun 
    263   1.2    itojun extern struct socket *ip6_mrouter; 	/* multicast routing daemon */
    264   1.2    itojun extern int	ip6_sendredirects;	/* send IP redirects when forwarding? */
    265   1.2    itojun extern int	ip6_maxfragpackets; /* Maximum packets in reassembly queue */
    266  1.19    itojun extern int	ip6_maxfrags;	/* Maximum fragments in reassembly queue */
    267   1.2    itojun extern int	ip6_keepfaith;		/* Firewall Aided Internet Translator */
    268   1.2    itojun extern int	ip6_log_interval;
    269   1.2    itojun extern time_t	ip6_log_time;
    270   1.2    itojun extern int	ip6_hdrnestlimit; /* upper limit of # of extension headers */
    271   1.2    itojun extern int	ip6_dad_count;		/* DupAddrDetectionTransmits */
    272   1.2    itojun 
    273   1.2    itojun extern int ip6_auto_flowlabel;
    274  1.21    itojun extern int ip6_auto_linklocal;
    275  1.15    itojun 
    276  1.15    itojun extern int   ip6_anonportmin;		/* minimum ephemeral port */
    277  1.15    itojun extern int   ip6_anonportmax;		/* maximum ephemeral port */
    278  1.15    itojun extern int   ip6_lowportmin;		/* minimum reserved port */
    279  1.15    itojun extern int   ip6_lowportmax;		/* maximum reserved port */
    280   1.2    itojun 
    281  1.36    rpaulo extern int	ip6_prefer_tempaddr; /* whether to prefer temporary addresses
    282  1.36    rpaulo 					in the source address selection */
    283  1.35    rpaulo extern int	ip6_use_defzone; /* whether to use the default scope zone
    284  1.35    rpaulo 				    when unspecified */
    285  1.35    rpaulo 
    286  1.39  liamjfoy #ifdef GATEWAY
    287  1.39  liamjfoy extern int      ip6_maxflows;           /* maximum amount of flows for ip6ff */
    288  1.40  liamjfoy extern int	ip6_hashsize;		/* size of hash table */
    289  1.39  liamjfoy #endif
    290  1.39  liamjfoy 
    291  1.93     ozaki struct inpcb;
    292  1.60     rmind extern const struct pr_usrreqs rip6_usrreqs;
    293   1.6    itojun 
    294  1.51    plunky int	icmp6_ctloutput(int, struct socket *, struct sockopt *);
    295   1.6    itojun 
    296  1.63  christos struct mbuf;
    297  1.38    dyoung void	ip6_init(void);
    298  1.46    dyoung const struct ip6aux *ip6_getdstifaddr(struct mbuf *);
    299  1.38    dyoung void	ip6_freepcbopts(struct ip6_pktopts *);
    300  1.38    dyoung void	ip6_freemoptions(struct ip6_moptions *);
    301  1.38    dyoung int	ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
    302  1.78      maxv int	ip6_get_prevhdr(struct mbuf *, int);
    303  1.80      maxv int	ip6_nexthdr(struct mbuf *, int, int, int *);
    304  1.38    dyoung int	ip6_lasthdr(struct mbuf *, int, int, int *);
    305  1.38    dyoung 
    306  1.63  christos struct ip6_hdr;
    307  1.38    dyoung int	ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
    308  1.57  drochner int	ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *);
    309  1.93     ozaki void	ip6_savecontrol(struct inpcb *, struct mbuf **, struct ip6_hdr *,
    310  1.38    dyoung 		struct mbuf *);
    311  1.93     ozaki void	ip6_notify_pmtu(struct inpcb *, const struct sockaddr_in6 *,
    312  1.38    dyoung 		u_int32_t *);
    313  1.38    dyoung int	ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
    314  1.38    dyoung 
    315  1.86     ozaki void	ip6_forward(struct mbuf *, int, struct ifnet *);
    316  1.38    dyoung 
    317  1.38    dyoung void	ip6_mloopback(struct ifnet *, struct mbuf *,
    318  1.38    dyoung 	              const struct sockaddr_in6 *);
    319  1.74     ozaki int	ip6_output(struct mbuf *, struct ip6_pktopts *, struct route *, int,
    320  1.93     ozaki 	    struct ip6_moptions *, struct inpcb *, struct ifnet **);
    321  1.72     ozaki int	ip6_if_output(struct ifnet * const, struct ifnet * const,
    322  1.72     ozaki 	    struct mbuf * const,
    323  1.72     ozaki 	    const struct sockaddr_in6 * const, const struct rtentry *);
    324  1.51    plunky int	ip6_ctloutput(int, struct socket *, struct sockopt *);
    325  1.51    plunky int	ip6_raw_ctloutput(int, struct socket *, struct sockopt *);
    326  1.38    dyoung void	ip6_initpktopts(struct ip6_pktopts *);
    327  1.38    dyoung int	ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
    328  1.53      elad 			    struct ip6_pktopts *, kauth_cred_t, int);
    329  1.38    dyoung void	ip6_clearpktopts(struct ip6_pktopts *, int);
    330  1.38    dyoung struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
    331  1.93     ozaki int	ip6_optlen(struct inpcb *);
    332  1.38    dyoung 
    333  1.49   thorpej void	ip6_statinc(u_int);
    334  1.49   thorpej 
    335  1.38    dyoung int	route6_input(struct mbuf **, int *, int);
    336  1.38    dyoung 
    337  1.38    dyoung void	frag6_init(void);
    338  1.38    dyoung int	frag6_input(struct mbuf **, int *, int);
    339  1.56    zoltan int	ip6_reass_packet(struct mbuf **, int);
    340  1.38    dyoung void	frag6_slowtimo(void);
    341  1.54    dyoung void	frag6_fasttimo(void);
    342  1.38    dyoung void	frag6_drain(void);
    343  1.54    dyoung void	frag6_drainstub(void);
    344  1.38    dyoung 
    345  1.40  liamjfoy int	ip6flow_init(int);
    346  1.52  liamjfoy void	ip6flow_poolinit(void);
    347  1.39  liamjfoy struct  ip6flow *ip6flow_reap(int);
    348  1.71     ozaki void    ip6flow_create(struct route *, struct mbuf *);
    349  1.39  liamjfoy void    ip6flow_slowtimo(void);
    350  1.40  liamjfoy int	ip6flow_invalidate_all(int);
    351  1.39  liamjfoy 
    352  1.38    dyoung void	rip6_init(void);
    353  1.38    dyoung int	rip6_input(struct mbuf **, int *, int);
    354  1.50        ad void	*rip6_ctlinput(int, const struct sockaddr *, void *);
    355  1.51    plunky int	rip6_ctloutput(int, struct socket *, struct sockopt *);
    356  1.45    dyoung int	rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *,
    357  1.45    dyoung 			 struct mbuf *);
    358  1.61     rmind int	rip6_attach(struct socket *, int);
    359  1.38    dyoung int	rip6_usrreq(struct socket *,
    360  1.38    dyoung 	    int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
    361  1.38    dyoung 
    362  1.38    dyoung int	dest6_input(struct mbuf **, int *, int);
    363  1.38    dyoung int	none_input(struct mbuf **, int *, int);
    364  1.38    dyoung 
    365  1.38    dyoung struct route;
    366  1.38    dyoung 
    367  1.69     ozaki int	in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *,
    368  1.69     ozaki 	   struct ip6_moptions *, struct route *, struct in6_addr *,
    369  1.69     ozaki 	   struct ifnet **, struct psref *, struct in6_addr *);
    370  1.38    dyoung int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
    371  1.70     ozaki 	struct route **, struct rtentry **, bool);
    372  1.73     ozaki int	ip6_get_membership(const struct sockopt *, struct ifnet **,
    373  1.73     ozaki 	    struct psref *, void *, size_t);
    374  1.32    itojun 
    375  1.89  christos static __inline uint32_t
    376  1.89  christos ip6_randomid(void)
    377  1.89  christos {
    378  1.89  christos 
    379  1.89  christos 	return cprng_fast32();
    380  1.89  christos }
    381  1.89  christos 
    382  1.89  christos static __inline uint32_t
    383  1.89  christos ip6_randomflowlabel(void)
    384  1.89  christos {
    385  1.89  christos 
    386  1.90       ryo 	return cprng_fast32() & 0xfffff;
    387  1.89  christos }
    388  1.81     ozaki 
    389  1.89  christos static __inline bool
    390  1.81     ozaki ip6_dad_enabled(void)
    391  1.81     ozaki {
    392  1.81     ozaki 
    393  1.81     ozaki 	return ip6_dad_count > 0;
    394  1.81     ozaki }
    395   1.2    itojun #endif /* _KERNEL */
    396   1.2    itojun 
    397   1.2    itojun #endif /* !_NETINET6_IP6_VAR_H_ */
    398