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NetBSD/sys/netinet6/ip6_var.h
itojun fadbd2b29a cleanup AH/policy processing. 
- parse IPv6 header by using common function, ip6_{last,next}hdr.
- fix behaivior in multiple AH cases.
  make strict boundary checks on mbuf chasing.
(sync with latest kame)
2000-03-21 23:53:30 +00:00

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/* $NetBSD: ip6_var.h,v 1.12 2000/03/21 23:53:31 itojun Exp $ */
/* $KAME: ip6_var.h,v 1.28 2000/03/09 00:46:12 itojun 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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
};
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) (*(struct mbuf **)&((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 sucessfully 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 */
/* XXX the following two items are not really AF_INET6 thing */
u_quad_t ip6s_exthdrget; /* # of calls to IP6_EXTHDR_GET */
u_quad_t ip6s_exthdrget0; /* # of calls to IP6_EXTHDR_GET0 */
u_quad_t ip6s_pulldown; /* # of calls to m_pulldown */
u_quad_t ip6s_pulldown_copy; /* # of mbuf copies in m_pulldown */
u_quad_t ip6s_pulldown_alloc; /* # of mbuf allocs in m_pulldown */
u_quad_t ip6s_pullup; /* # of calls to m_pullup */
u_quad_t ip6s_pullup_copy; /* # of possible m_pullup copies */
u_quad_t ip6s_pullup_alloc; /* # of possible m_pullup mallocs */
u_quad_t ip6s_pullup_fail; /* # of possible m_pullup failures */
u_quad_t ip6s_pullup2; /* # of calls to m_pullup2 */
u_quad_t ip6s_pullup2_copy; /* # of possible m_pullup2 copies */
u_quad_t ip6s_pullup2_alloc; /* # of possible m_pullup2 mallocs */
u_quad_t ip6s_pullup2_fail; /* # of possible m_pullup2 failures */
/*
* 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];
};
#ifdef _KERNEL
/* flags passed to ip6_output as last parameter */
#define IPV6_DADOUTPUT 0x01 /* DAD */
#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
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_forward_srcrt; /* forward src-routed? */
extern int ip6_gif_hlim; /* Hop limit for gif encap packet */
extern int ip6_use_deprecated; /* allow deprecated addr as source */
extern int ip6_rr_prune; /* router renumbering prefix
* walk list every 5 sec. */
#ifndef INET6_BINDV6ONLY
extern int ip6_bindv6only;
#endif
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_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;
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));
char * 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 ifnet **));
int ip6_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 **mp, int *offp, int proto));
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));
#endif /* _KERNEL */
#endif /* !_NETINET6_IP6_VAR_H_ */
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