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freebsd-skq/sys/netinet6/ip6_var.h
Bjoern A. Zeeb d3443481dc MFp4 bz_ipv6_fast: 
Hide the ip6aux functions.  The only one referenced outside ip6_input.c
  is not compiled in yet (__notyet__) in route6.c (r235954).  We do have
  accessor functions that should be used.

  Sponsored by:	The FreeBSD Foundation
  Sponsored by:	iXsystems

Reviewed by:	gnn (as part of the whole)
MFC After:	3 days
X-MFC:		KPI?
2012-05-25 01:48:15 +00:00

456 lines
18 KiB
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/*-
* 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.
*
* $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $
*/
/*-
* 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.
* 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
* $FreeBSD$
*/
#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 {
struct ip6asfrag *ip6q_down;
struct ip6asfrag *ip6q_up;
u_int32_t ip6q_ident;
u_int8_t ip6q_nxt;
u_int8_t ip6q_ecn;
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 label *ip6q_label;
};
struct ip6asfrag {
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))
/*
* Structure attached to inpcb.in6p_moptions and
* passed to ip6_output when IPv6 multicast options are in use.
* This structure is lazy-allocated.
*/
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 */
u_short im6o_num_memberships; /* no. memberships this socket */
u_short im6o_max_memberships; /* max memberships this socket */
struct in6_multi **im6o_membership; /* group memberships */
struct in6_mfilter *im6o_mfilters; /* source filters */
};
/*
* 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
/* Nexthop related info */
struct ip6po_nhinfo {
struct sockaddr *ip6po_nhi_nexthop;
struct route_in6 ip6po_nhi_route; /* Route to the nexthop */
};
#define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop
#define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
struct ip6_pktopts {
struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */
int ip6po_hlim; /* Hoplimit for outgoing packets */
/* Outgoing IF/address information */
struct in6_pktinfo *ip6po_pktinfo;
/* Next-hop address information */
struct ip6po_nhinfo ip6po_nhinfo;
struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
/* 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;
int ip6po_tclass; /* traffic class */
int ip6po_minmtu; /* fragment vs PMTU discovery policy */
#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_prefer_tempaddr; /* whether temporary addresses are
preferred as source address */
#define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */
#define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
#define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */
int ip6po_flags;
#if 0 /* parameters in this block is obsolete. do not reuse the values. */
#define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */
#define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */
#endif
#define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */
#define IP6PO_USECOA 0x08 /* use care of address */
};
/*
* Control options for incoming packets
*/
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 contiguous */
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 a deprecated address is chosen */
u_quad_t ip6s_sources_deprecated[16];
/* number of times that each rule of source selection is applied. */
u_quad_t ip6s_sources_rule[16];
};
#ifdef _KERNEL
#define IP6STAT_ADD(name, val) V_ip6stat.name += (val)
#define IP6STAT_SUB(name, val) V_ip6stat.name -= (val)
#define IP6STAT_INC(name) IP6STAT_ADD(name, 1)
#define IP6STAT_DEC(name) IP6STAT_SUB(name, 1)
#endif
#ifdef _KERNEL
/*
* IPv6 onion peeling state.
* it will be initialized when we come into ip6_input().
* XXX do not make it a kitchen sink!
*/
struct ip6aux {
u_int32_t ip6a_flags;
#define IP6A_SWAP 0x01 /* swapped home/care-of on packet */
#define IP6A_HASEEN 0x02 /* HA was present */
#define IP6A_BRUID 0x04 /* BR Unique Identifier was present */
#define IP6A_RTALERTSEEN 0x08 /* rtalert present */
/* ip6.ip6_src */
struct in6_addr ip6a_careof; /* care-of address of the peer */
struct in6_addr ip6a_home; /* home address of the peer */
u_int16_t ip6a_bruid; /* BR unique identifier */
/* ip6.ip6_dst */
struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
/* rtalert */
u_int16_t ip6a_rtalert; /* rtalert option value */
/*
* decapsulation history will be here.
* with IPsec it may not be accurate.
*/
};
#endif
#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) ((((intptr_t) (ip)) & 3) == 0)
#endif
VNET_DECLARE(struct ip6stat, ip6stat); /* statistics */
VNET_DECLARE(int, ip6_defhlim); /* default hop limit */
VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */
VNET_DECLARE(int, ip6_forwarding); /* act as router? */
VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */
VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix
* walk list every 5 sec. */
VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */
VNET_DECLARE(int, ip6_v6only);
#define V_ip6stat VNET(ip6stat)
#define V_ip6_defhlim VNET(ip6_defhlim)
#define V_ip6_defmcasthlim VNET(ip6_defmcasthlim)
#define V_ip6_forwarding VNET(ip6_forwarding)
#define V_ip6_use_deprecated VNET(ip6_use_deprecated)
#define V_ip6_rr_prune VNET(ip6_rr_prune)
#define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu)
#define V_ip6_v6only VNET(ip6_v6only)
VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */
VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */
VNET_DECLARE(int, ip6_maxfragpackets); /* Maximum packets in reassembly
* queue */
VNET_DECLARE(int, ip6_maxfrags); /* Maximum fragments in reassembly
* queue */
VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */
VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */
VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA
* receiving IF. */
VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when
forwarding enabled */
VNET_DECLARE(int, ip6_keepfaith); /* Firewall Aided Internet Translator */
VNET_DECLARE(int, ip6_log_interval);
VNET_DECLARE(time_t, ip6_log_time);
VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension
* headers */
VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */
#define V_ip6_mrouter VNET(ip6_mrouter)
#define V_ip6_sendredirects VNET(ip6_sendredirects)
#define V_ip6_maxfragpackets VNET(ip6_maxfragpackets)
#define V_ip6_maxfrags VNET(ip6_maxfrags)
#define V_ip6_accept_rtadv VNET(ip6_accept_rtadv)
#define V_ip6_no_radr VNET(ip6_no_radr)
#define V_ip6_norbit_raif VNET(ip6_norbit_raif)
#define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3)
#define V_ip6_keepfaith VNET(ip6_keepfaith)
#define V_ip6_log_interval VNET(ip6_log_interval)
#define V_ip6_log_time VNET(ip6_log_time)
#define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit)
#define V_ip6_dad_count VNET(ip6_dad_count)
VNET_DECLARE(int, ip6_auto_flowlabel);
VNET_DECLARE(int, ip6_auto_linklocal);
#define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel)
#define V_ip6_auto_linklocal VNET(ip6_auto_linklocal)
VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */
VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary
* addresses in the source address
* selection */
#define V_ip6_use_tempaddr VNET(ip6_use_tempaddr)
#define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr)
VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope
* zone when unspecified */
#define V_ip6_use_defzone VNET(ip6_use_defzone)
VNET_DECLARE (struct pfil_head, inet6_pfil_hook); /* packet filter hooks */
#define V_inet6_pfil_hook VNET(inet6_pfil_hook)
#ifdef IPSTEALTH
VNET_DECLARE(int, ip6stealth);
#define V_ip6stealth VNET(ip6stealth)
#endif
extern struct pr_usrreqs rip6_usrreqs;
struct sockopt;
struct inpcb;
int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt));
struct in6_ifaddr;
void ip6_init __P((void));
#ifdef VIMAGE
void ip6_destroy __P((void));
#endif
int ip6proto_register(short);
int ip6proto_unregister(short);
void ip6_input __P((struct mbuf *));
struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *));
void ip6_freepcbopts __P((struct ip6_pktopts *));
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 *));
#ifdef __notyet__
struct ip6aux *ip6_findaux __P((struct mbuf *));
#endif
extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
struct mbuf *);
int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
u_int32_t *));
struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
struct mbuf **, int *);
void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **));
void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
u_int32_t *));
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 **,
struct inpcb *));
int ip6_ctloutput __P((struct socket *, struct sockopt *));
int ip6_raw_ctloutput __P((struct socket *, struct sockopt *));
void ip6_initpktopts __P((struct ip6_pktopts *));
int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *,
struct ip6_pktopts *, struct ucred *, int));
void ip6_clearpktopts __P((struct ip6_pktopts *, int));
struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
int ip6_optlen __P((struct inpcb *));
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((struct socket *, struct sockopt *));
int rip6_output __P((struct mbuf *, ...));
int rip6_usrreq __P((struct socket *,
int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *));
int dest6_input __P((struct mbuf **, int *, int));
int none_input __P((struct mbuf **, int *, int));
int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *,
struct inpcb *inp, struct route_in6 *, struct ucred *cred,
struct ifnet **, struct in6_addr *);
int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *,
struct ip6_moptions *, struct route_in6 *, struct ifnet **,
struct rtentry **));
int in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *,
struct ip6_moptions *, struct route_in6 *, struct ifnet **,
struct rtentry **, u_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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