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ip6_var.h revision 1.12
      1  1.12   itojun /*	$NetBSD: ip6_var.h,v 1.12 2000/03/21 23:53:31 itojun Exp $	*/
      2  1.12   itojun /*	$KAME: ip6_var.h,v 1.28 2000/03/09 00:46:12 itojun 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   1.2   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   1.2   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   1.2   itojun  * 3. All advertising materials mentioning features or use of this software
     46   1.2   itojun  *    must display the following acknowledgement:
     47   1.2   itojun  *	This product includes software developed by the University of
     48   1.2   itojun  *	California, Berkeley and its contributors.
     49   1.2   itojun  * 4. Neither the name of the University nor the names of its contributors
     50   1.2   itojun  *    may be used to endorse or promote products derived from this software
     51   1.2   itojun  *    without specific prior written permission.
     52   1.2   itojun  *
     53   1.2   itojun  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     54   1.2   itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     55   1.2   itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     56   1.2   itojun  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     57   1.2   itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     58   1.2   itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     59   1.2   itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     60   1.2   itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     61   1.2   itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     62   1.2   itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     63   1.2   itojun  * SUCH DAMAGE.
     64   1.2   itojun  *
     65   1.2   itojun  *	@(#)ip_var.h	8.1 (Berkeley) 6/10/93
     66   1.2   itojun  */
     67   1.2   itojun 
     68   1.2   itojun #ifndef _NETINET6_IP6_VAR_H_
     69   1.2   itojun #define _NETINET6_IP6_VAR_H_
     70   1.2   itojun 
     71   1.2   itojun /*
     72   1.2   itojun  * IP6 reassembly queue structure.  Each fragment
     73   1.2   itojun  * being reassembled is attached to one of these structures.
     74   1.2   itojun  */
     75   1.2   itojun struct	ip6q {
     76   1.9   itojun 	u_int32_t	ip6q_head;
     77   1.9   itojun 	u_int16_t	ip6q_len;
     78   1.9   itojun 	u_int8_t	ip6q_nxt;	/* ip6f_nxt in first fragment */
     79   1.9   itojun 	u_int8_t	ip6q_hlim;
     80   1.9   itojun 	struct ip6asfrag *ip6q_down;
     81   1.9   itojun 	struct ip6asfrag *ip6q_up;
     82   1.9   itojun 	u_int32_t	ip6q_ident;
     83   1.9   itojun 	u_int8_t	ip6q_arrive;
     84   1.9   itojun 	u_int8_t	ip6q_ttl;
     85   1.9   itojun 	struct in6_addr	ip6q_src, ip6q_dst;
     86   1.9   itojun 	struct ip6q	*ip6q_next;
     87   1.9   itojun 	struct ip6q	*ip6q_prev;
     88   1.9   itojun 	int		ip6q_unfrglen;	/* len of unfragmentable part */
     89   1.2   itojun #ifdef notyet
     90   1.9   itojun 	u_char		*ip6q_nxtp;
     91   1.2   itojun #endif
     92   1.2   itojun };
     93   1.2   itojun 
     94   1.2   itojun struct	ip6asfrag {
     95   1.9   itojun 	u_int32_t	ip6af_head;
     96   1.9   itojun 	u_int16_t	ip6af_len;
     97   1.9   itojun 	u_int8_t	ip6af_nxt;
     98   1.9   itojun 	u_int8_t	ip6af_hlim;
     99   1.2   itojun 	/* must not override the above members during reassembling */
    100   1.9   itojun 	struct ip6asfrag *ip6af_down;
    101   1.9   itojun 	struct ip6asfrag *ip6af_up;
    102   1.9   itojun 	struct mbuf	*ip6af_m;
    103   1.9   itojun 	int		ip6af_offset;	/* offset in ip6af_m to next header */
    104   1.9   itojun 	int		ip6af_frglen;	/* fragmentable part length */
    105   1.9   itojun 	int		ip6af_off;	/* fragment offset */
    106   1.9   itojun 	u_int16_t	ip6af_mff;	/* more fragment bit in frag off */
    107   1.2   itojun };
    108   1.2   itojun 
    109   1.2   itojun #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
    110   1.2   itojun 
    111   1.2   itojun struct	ip6_moptions {
    112   1.2   itojun 	struct	ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
    113   1.2   itojun 	u_char	im6o_multicast_hlim;	/* hoplimit for outgoing multicasts */
    114   1.2   itojun 	u_char	im6o_multicast_loop;	/* 1 >= hear sends if a member */
    115   1.2   itojun 	LIST_HEAD(, in6_multi_mship) im6o_memberships;
    116   1.2   itojun };
    117   1.2   itojun 
    118   1.2   itojun /*
    119   1.2   itojun  * Control options for outgoing packets
    120   1.2   itojun  */
    121   1.2   itojun 
    122   1.2   itojun /* Routing header related info */
    123   1.2   itojun struct	ip6po_rhinfo {
    124   1.2   itojun 	struct	ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
    125   1.2   itojun 	struct	route_in6 ip6po_rhi_route; /* Route to the 1st hop */
    126   1.2   itojun };
    127   1.2   itojun #define ip6po_rthdr	ip6po_rhinfo.ip6po_rhi_rthdr
    128   1.2   itojun #define ip6po_route	ip6po_rhinfo.ip6po_rhi_route
    129   1.2   itojun 
    130   1.2   itojun struct	ip6_pktopts {
    131   1.2   itojun 	struct	mbuf *ip6po_m;	/* Pointer to mbuf storing the data */
    132   1.2   itojun 	int	ip6po_hlim;		/* Hoplimit for outgoing packets */
    133   1.2   itojun 	struct	in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */
    134   1.2   itojun 	struct	sockaddr *ip6po_nexthop;	/* Next-hop address */
    135   1.2   itojun 	struct	ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
    136   1.2   itojun 	struct	ip6_dest *ip6po_dest1; /* Destination options header(1st part) */
    137   1.2   itojun 	struct	ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */
    138   1.2   itojun 	struct	ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */
    139   1.2   itojun };
    140   1.2   itojun 
    141   1.2   itojun struct	ip6stat {
    142   1.5   bouyer 	u_quad_t ip6s_total;		/* total packets received */
    143   1.5   bouyer 	u_quad_t ip6s_tooshort;		/* packet too short */
    144   1.5   bouyer 	u_quad_t ip6s_toosmall;		/* not enough data */
    145   1.5   bouyer 	u_quad_t ip6s_fragments;	/* fragments received */
    146   1.5   bouyer 	u_quad_t ip6s_fragdropped;	/* frags dropped(dups, out of space) */
    147   1.5   bouyer 	u_quad_t ip6s_fragtimeout;	/* fragments timed out */
    148   1.5   bouyer 	u_quad_t ip6s_fragoverflow;	/* fragments that exceeded limit */
    149   1.5   bouyer 	u_quad_t ip6s_forward;		/* packets forwarded */
    150   1.5   bouyer 	u_quad_t ip6s_cantforward;	/* packets rcvd for unreachable dest */
    151   1.5   bouyer 	u_quad_t ip6s_redirectsent;	/* packets forwarded on same net */
    152   1.6   itojun 	u_quad_t ip6s_delivered;	/* datagrams delivered to upper level*/
    153   1.5   bouyer 	u_quad_t ip6s_localout;		/* total ip packets generated here */
    154   1.5   bouyer 	u_quad_t ip6s_odropped;		/* lost packets due to nobufs, etc. */
    155   1.5   bouyer 	u_quad_t ip6s_reassembled;	/* total packets reassembled ok */
    156   1.5   bouyer 	u_quad_t ip6s_fragmented;	/* datagrams sucessfully fragmented */
    157   1.5   bouyer 	u_quad_t ip6s_ofragments;	/* output fragments created */
    158   1.5   bouyer 	u_quad_t ip6s_cantfrag;		/* don't fragment flag was set, etc. */
    159   1.5   bouyer 	u_quad_t ip6s_badoptions;	/* error in option processing */
    160   1.5   bouyer 	u_quad_t ip6s_noroute;		/* packets discarded due to no route */
    161   1.5   bouyer 	u_quad_t ip6s_badvers;		/* ip6 version != 6 */
    162   1.5   bouyer 	u_quad_t ip6s_rawout;		/* total raw ip packets generated */
    163   1.5   bouyer 	u_quad_t ip6s_badscope;		/* scope error */
    164   1.5   bouyer 	u_quad_t ip6s_notmember;	/* don't join this multicast group */
    165   1.5   bouyer 	u_quad_t ip6s_nxthist[256];	/* next header history */
    166   1.5   bouyer 	u_quad_t ip6s_m1;		/* one mbuf */
    167   1.5   bouyer 	u_quad_t ip6s_m2m[32];		/* two or more mbuf */
    168   1.5   bouyer 	u_quad_t ip6s_mext1;		/* one ext mbuf */
    169   1.5   bouyer 	u_quad_t ip6s_mext2m;		/* two or more ext mbuf */
    170   1.5   bouyer 	u_quad_t ip6s_exthdrtoolong;	/* ext hdr are not continuous */
    171   1.5   bouyer 	u_quad_t ip6s_nogif;		/* no match gif found */
    172   1.5   bouyer 	u_quad_t ip6s_toomanyhdr;	/* discarded due to too many headers */
    173   1.6   itojun 	/* XXX the following two items are not really AF_INET6 thing */
    174  1.10   itojun 	u_quad_t ip6s_exthdrget;	/* # of calls to IP6_EXTHDR_GET */
    175  1.10   itojun 	u_quad_t ip6s_exthdrget0;	/* # of calls to IP6_EXTHDR_GET0 */
    176   1.6   itojun 	u_quad_t ip6s_pulldown;		/* # of calls to m_pulldown */
    177   1.6   itojun 	u_quad_t ip6s_pulldown_copy;	/* # of mbuf copies in m_pulldown */
    178   1.6   itojun 	u_quad_t ip6s_pulldown_alloc;	/* # of mbuf allocs in m_pulldown */
    179  1.10   itojun 	u_quad_t ip6s_pullup;		/* # of calls to m_pullup */
    180  1.10   itojun 	u_quad_t ip6s_pullup_copy;	/* # of possible m_pullup copies */
    181  1.10   itojun 	u_quad_t ip6s_pullup_alloc;	/* # of possible m_pullup mallocs */
    182  1.10   itojun 	u_quad_t ip6s_pullup_fail;	/* # of possible m_pullup failures */
    183  1.10   itojun 	u_quad_t ip6s_pullup2;		/* # of calls to m_pullup2 */
    184  1.10   itojun 	u_quad_t ip6s_pullup2_copy;	/* # of possible m_pullup2 copies */
    185  1.10   itojun 	u_quad_t ip6s_pullup2_alloc;	/* # of possible m_pullup2 mallocs */
    186  1.10   itojun 	u_quad_t ip6s_pullup2_fail;	/* # of possible m_pullup2 failures */
    187  1.10   itojun 
    188  1.10   itojun 	/*
    189  1.10   itojun 	 * statistics for improvement of the source address selection
    190  1.10   itojun 	 * algorithm:
    191  1.10   itojun 	 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
    192  1.10   itojun 	 */
    193  1.10   itojun 	/* number of times that address selection fails */
    194  1.10   itojun 	u_quad_t ip6s_sources_none;
    195  1.10   itojun 	/* number of times that an address on the outgoing I/F is chosen */
    196  1.10   itojun 	u_quad_t ip6s_sources_sameif[16];
    197  1.10   itojun 	/* number of times that an address on a non-outgoing I/F is chosen */
    198  1.10   itojun 	u_quad_t ip6s_sources_otherif[16];
    199  1.10   itojun 	/*
    200  1.10   itojun 	 * number of times that an address that has the same scope
    201  1.10   itojun 	 * from the destination is chosen.
    202  1.10   itojun 	 */
    203  1.10   itojun 	u_quad_t ip6s_sources_samescope[16];
    204  1.10   itojun 	/*
    205  1.10   itojun 	 * number of times that an address that has a different scope
    206  1.10   itojun 	 * from the destination is chosen.
    207  1.10   itojun 	 */
    208  1.10   itojun 	u_quad_t ip6s_sources_otherscope[16];
    209  1.10   itojun 	/* number of times that an deprecated address is chosen */
    210  1.10   itojun 	u_quad_t ip6s_sources_deprecated[16];
    211   1.2   itojun };
    212   1.2   itojun 
    213   1.2   itojun #ifdef _KERNEL
    214   1.2   itojun /* flags passed to ip6_output as last parameter */
    215   1.2   itojun #define	IPV6_DADOUTPUT		0x01	/* DAD */
    216   1.2   itojun #define	IPV6_FORWARDING		0x02	/* most of IPv6 header exists */
    217   1.2   itojun 
    218   1.2   itojun extern struct	ip6stat ip6stat;	/* statistics */
    219   1.4   itojun extern u_int32_t ip6_id;		/* fragment identifier */
    220   1.2   itojun extern int	ip6_defhlim;		/* default hop limit */
    221   1.2   itojun extern int	ip6_defmcasthlim;	/* default multicast hop limit */
    222   1.2   itojun extern int	ip6_forwarding;		/* act as router? */
    223   1.2   itojun extern int	ip6_forward_srcrt;	/* forward src-routed? */
    224   1.2   itojun extern int	ip6_gif_hlim;		/* Hop limit for gif encap packet */
    225   1.6   itojun extern int	ip6_use_deprecated;	/* allow deprecated addr as source */
    226   1.6   itojun extern int	ip6_rr_prune;		/* router renumbering prefix
    227   1.6   itojun 					 * walk list every 5 sec.    */
    228   1.7   itojun #ifndef INET6_BINDV6ONLY
    229   1.7   itojun extern int	ip6_bindv6only;
    230   1.7   itojun #endif
    231   1.6   itojun 
    232   1.2   itojun extern struct socket *ip6_mrouter; 	/* multicast routing daemon */
    233   1.2   itojun extern int	ip6_sendredirects;	/* send IP redirects when forwarding? */
    234   1.2   itojun extern int	ip6_maxfragpackets; /* Maximum packets in reassembly queue */
    235   1.2   itojun extern int	ip6_sourcecheck;	/* Verify source interface */
    236   1.2   itojun extern int	ip6_sourcecheck_interval; /* Interval between log messages */
    237   1.2   itojun extern int	ip6_accept_rtadv;	/* Acts as a host not a router */
    238   1.2   itojun extern int	ip6_keepfaith;		/* Firewall Aided Internet Translator */
    239   1.2   itojun extern int	ip6_log_interval;
    240   1.2   itojun extern time_t	ip6_log_time;
    241   1.2   itojun extern int	ip6_hdrnestlimit; /* upper limit of # of extension headers */
    242   1.2   itojun extern int	ip6_dad_count;		/* DupAddrDetectionTransmits */
    243   1.2   itojun 
    244   1.2   itojun extern u_int32_t ip6_flow_seq;
    245   1.2   itojun extern int ip6_auto_flowlabel;
    246   1.2   itojun 
    247   1.2   itojun struct in6pcb;
    248   1.6   itojun 
    249   1.2   itojun int	icmp6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
    250   1.6   itojun 
    251   1.2   itojun void	ip6_init __P((void));
    252   1.2   itojun void	ip6intr __P((void));
    253   1.2   itojun void	ip6_input __P((struct mbuf *));
    254   1.2   itojun void	ip6_freemoptions __P((struct ip6_moptions *));
    255   1.2   itojun int	ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
    256   1.2   itojun char *	ip6_get_prevhdr __P((struct mbuf *, int));
    257  1.12   itojun int	ip6_nexthdr __P((struct mbuf *, int, int, int *));
    258  1.12   itojun int	ip6_lasthdr __P((struct mbuf *, int, int, int *));
    259   1.2   itojun int	ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *));
    260   1.4   itojun int	ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
    261   1.2   itojun 				 u_int32_t *));
    262   1.2   itojun void	ip6_savecontrol __P((struct in6pcb *, struct mbuf **, struct ip6_hdr *,
    263   1.2   itojun 		struct mbuf *));
    264   1.2   itojun int	ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
    265   1.2   itojun 
    266   1.2   itojun void	ip6_forward __P((struct mbuf *, int));
    267   1.2   itojun 
    268   1.2   itojun void	ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
    269   1.2   itojun int	ip6_output __P((struct mbuf *, struct ip6_pktopts *,
    270   1.2   itojun 			struct route_in6 *, int,
    271   1.6   itojun 			struct ip6_moptions *, struct ifnet **));
    272   1.2   itojun int	ip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
    273   1.2   itojun int	ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, int));
    274   1.2   itojun int	ip6_optlen __P((struct in6pcb *));
    275   1.2   itojun 
    276   1.2   itojun int	route6_input __P((struct mbuf **, int *, int));
    277   1.2   itojun 
    278   1.2   itojun void	frag6_init __P((void));
    279   1.2   itojun int	frag6_input __P((struct mbuf **, int *, int));
    280   1.2   itojun void	frag6_slowtimo __P((void));
    281   1.2   itojun void	frag6_drain __P((void));
    282   1.2   itojun 
    283   1.2   itojun void	rip6_init __P((void));
    284   1.2   itojun int	rip6_input __P((struct mbuf **mp, int *offp, int proto));
    285  1.11   itojun void	rip6_ctlinput __P((int, struct sockaddr *, void *));
    286   1.2   itojun int	rip6_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
    287   1.2   itojun int	rip6_output __P((struct mbuf *, ...));
    288   1.2   itojun int	rip6_usrreq __P((struct socket *,
    289   1.2   itojun 	    int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *));
    290   1.2   itojun 
    291   1.2   itojun int	dest6_input __P((struct mbuf **, int *, int));
    292   1.2   itojun int	none_input __P((struct mbuf **, int *, int));
    293   1.2   itojun #endif /* _KERNEL */
    294   1.2   itojun 
    295   1.2   itojun #endif /* !_NETINET6_IP6_VAR_H_ */
    296