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NetBSD/sys/netinet6/ip6_var.h

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/* $NetBSD: ip6_var.h,v 1.93 2022/10/28 05:18:39 ozaki-r 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_
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
struct ip6_moptions {
if_index_t im6o_multicast_if_index; /* I/F 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 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 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 {
int ip6po_hlim; /* Hoplimit for outgoing packets */
struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */
struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */
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) */
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) */
};
/*
* IPv6 statistics.
* Each counter is an unsigned 64-bit value.
*/
#define IP6_STAT_TOTAL 0 /* total packets received */
#define IP6_STAT_TOOSHORT 1 /* packet too short */
#define IP6_STAT_TOOSMALL 2 /* not enough data */
#define IP6_STAT_FRAGMENTS 3 /* fragments received */
#define IP6_STAT_FRAGDROPPED 4 /* frags dropped (dups, out of space) */
#define IP6_STAT_FRAGTIMEOUT 5 /* fragments timed out */
#define IP6_STAT_FRAGOVERFLOW 6 /* fragments that exceed limit */
#define IP6_STAT_FORWARD 7 /* packets forwarded */
#define IP6_STAT_CANTFORWARD 8 /* packets rcvd for uncreachable dst */
#define IP6_STAT_REDIRECTSENT 9 /* packets forwarded on same net */
#define IP6_STAT_DELIVERED 10 /* datagrams delivered to upper level */
#define IP6_STAT_LOCALOUT 11 /* total IP packets generated here */
#define IP6_STAT_ODROPPED 12 /* lost packets due to nobufs, etc. */
#define IP6_STAT_REASSEMBLED 13 /* total packets reassembled ok */
#define IP6_STAT_FRAGMENTED 14 /* datagrams successfully fragmented */
#define IP6_STAT_OFRAGMENTS 15 /* output fragments created */
#define IP6_STAT_CANTFRAG 16 /* don't fragment flag was set, etc. */
#define IP6_STAT_BADOPTIONS 17 /* error in option processing */
#define IP6_STAT_NOROUTE 18 /* packets discarded due to no route */
#define IP6_STAT_BADVERS 19 /* ip6 version != 6 */
#define IP6_STAT_RAWOUT 20 /* total raw ip packets generated */
#define IP6_STAT_BADSCOPE 21 /* scope error */
#define IP6_STAT_NOTMEMBER 22 /* don't join this multicast group */
#define IP6_STAT_NXTHIST 23 /* next header histogram */
/* space for 256 counters */
#define IP6_STAT_M1 279 /* one mbuf */
#define IP6_STAT_M2M 280 /* two or more mbuf */
/* space for 32 counters */
#define IP6_STAT_MEXT1 312 /* one ext mbuf */
#define IP6_STAT_MEXT2M 313 /* two or more ext mbuf */
#define IP6_STAT_EXTHDRTOOLONG 314 /* ext hdr are not contiguous */
#define IP6_STAT_NOGIF 315 /* no match gif found */
#define IP6_STAT_TOOMANYHDR 316 /* discarded due to too many headers */
/*
* statistics for improvement of the source address selection
* algorithm:
* XXX: hardcoded 16 = # of ip6 multicast scope types + 1
*/
#define IP6_STAT_SOURCES_NONE 317 /* number of times that address
selection fails */
#define IP6_STAT_SOURCES_SAMEIF 318 /* number of times that an address
on the outgoing I/F is chosen */
/* space for 16 counters */
#define IP6_STAT_SOURCES_OTHERIF 334 /* number of times that an address on
a non-outgoing I/F is chosen */
/* space for 16 counters */
#define IP6_STAT_SOURCES_SAMESCOPE 350 /* number of times that an address that
has the same scope from the dest.
is chosen */
/* space for 16 counters */
#define IP6_STAT_SOURCES_OTHERSCOPE 366 /* number of times that an address that
has a different scope from the dest.
is chosen */
/* space for 16 counters */
#define IP6_STAT_SOURCES_DEPRECATED 382 /* number of times that a deprecated
address is chosen */
/* space for 16 counters */
#define IP6_STAT_FORWARD_CACHEHIT 398
#define IP6_STAT_FORWARD_CACHEMISS 399
#define IP6_STAT_FASTFORWARD 400 /* packets fast forwarded */
#define IP6_STAT_FASTFORWARDFLOWS 401 /* number of fast forward flows */
#define IP6_STAT_NOIPSEC 402 /* no match ipsec(4) found */
#define IP6_STAT_PFILDROP_IN 403 /* dropped by pfil (PFIL_IN) */
#define IP6_STAT_PFILDROP_OUT 404 /* dropped by pfil (PFIL_OUT) */
#define IP6_STAT_IPSECDROP_IN 405 /* dropped by IPsec SP check */
#define IP6_STAT_IPSECDROP_OUT 406 /* dropped by IPsec SP check */
#define IP6_STAT_IFDROP 407 /* dropped due to interface state */
#define IP6_STAT_IDROPPED 408 /* lost packets due to nobufs, etc. */
#define IP6_STAT_TIMXCEED 409 /* hop limit exceeded */
#define IP6_STAT_TOOBIG 410 /* packet bigger than MTU */
#define IP6_STAT_RTREJECT 411 /* rejected by route */
#define IP6_NSTATS 412
#define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */
/*
* Structure for an IPv6 flow (ip6_fastforward).
*/
struct ip6flow {
TAILQ_ENTRY(ip6flow) ip6f_list; /* next in active list */
TAILQ_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */
size_t ip6f_hashidx; /* own hash index of ipflowtable[] */
struct in6_addr ip6f_dst; /* destination address */
struct in6_addr ip6f_src; /* source address */
struct route ip6f_ro; /* associated route entry */
u_int32_t ip6f_flow; /* flow (tos) */
u_quad_t ip6f_uses; /* number of uses in this period */
u_quad_t ip6f_last_uses; /* number of uses in last period */
u_quad_t ip6f_dropped; /* ENOBUFS returned by if_output */
u_quad_t ip6f_forwarded; /* packets forwarded */
u_int ip6f_timer; /* lifetime timer */
};
#ifdef _KERNEL
#include <sys/protosw.h>
#include <sys/cprng.h>
/*
* Auxiliary attributes of incoming IPv6 packets, which is initialized when we
* come into ip6_input().
* XXX do not make it a kitchen sink!
*/
struct ip6aux {
/* ip6.ip6_dst */
struct in6_addr ip6a_src;
uint32_t ip6a_scope_id;
int ip6a_flags;
};
/* 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 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_sendredirect; /* send ICMPv6 redirect? */
extern int ip6_use_deprecated; /* allow deprecated addr as source */
extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */
extern int ip6_v6only;
extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */
extern int ip6_maxdynroutes; /* Max # of routes created via redirect */
extern int ip6_param_rt_msg; /* How to send parmeter changing rtm */
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_maxfrags; /* Maximum fragments in reassembly queue */
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 int ip6_auto_flowlabel;
extern int ip6_auto_linklocal;
extern int ip6_anonportmin; /* minimum ephemeral port */
extern int ip6_anonportmax; /* maximum ephemeral port */
extern int ip6_lowportmin; /* minimum reserved port */
extern int ip6_lowportmax; /* maximum reserved port */
extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses
in the source address selection */
extern int ip6_use_defzone; /* whether to use the default scope zone
when unspecified */
#ifdef GATEWAY
extern int ip6_maxflows; /* maximum amount of flows for ip6ff */
extern int ip6_hashsize; /* size of hash table */
#endif
struct inpcb;
extern const struct pr_usrreqs rip6_usrreqs;
int icmp6_ctloutput(int, struct socket *, struct sockopt *);
struct mbuf;
void ip6_init(void);
const struct ip6aux *ip6_getdstifaddr(struct mbuf *);
void ip6_freepcbopts(struct ip6_pktopts *);
void ip6_freemoptions(struct ip6_moptions *);
int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
int ip6_get_prevhdr(struct mbuf *, int);
int ip6_nexthdr(struct mbuf *, int, int, int *);
int ip6_lasthdr(struct mbuf *, int, int, int *);
struct ip6_hdr;
int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *);
void ip6_savecontrol(struct inpcb *, struct mbuf **, struct ip6_hdr *,
struct mbuf *);
void ip6_notify_pmtu(struct inpcb *, const struct sockaddr_in6 *,
u_int32_t *);
int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
void ip6_forward(struct mbuf *, int, struct ifnet *);
void ip6_mloopback(struct ifnet *, struct mbuf *,
const struct sockaddr_in6 *);
int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route *, int,
struct ip6_moptions *, struct inpcb *, struct ifnet **);
int ip6_if_output(struct ifnet * const, struct ifnet * const,
struct mbuf * const,
const struct sockaddr_in6 * const, const struct rtentry *);
int ip6_ctloutput(int, struct socket *, struct sockopt *);
int ip6_raw_ctloutput(int, struct socket *, struct sockopt *);
void ip6_initpktopts(struct ip6_pktopts *);
int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
struct ip6_pktopts *, kauth_cred_t, int);
void ip6_clearpktopts(struct ip6_pktopts *, int);
struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
int ip6_optlen(struct inpcb *);
void ip6_statinc(u_int);
int route6_input(struct mbuf **, int *, int);
void frag6_init(void);
int frag6_input(struct mbuf **, int *, int);
int ip6_reass_packet(struct mbuf **, int);
void frag6_slowtimo(void);
void frag6_fasttimo(void);
void frag6_drain(void);
void frag6_drainstub(void);
int ip6flow_init(int);
void ip6flow_poolinit(void);
struct ip6flow *ip6flow_reap(int);
void ip6flow_create(struct route *, struct mbuf *);
void ip6flow_slowtimo(void);
int ip6flow_invalidate_all(int);
void rip6_init(void);
int rip6_input(struct mbuf **, int *, int);
void *rip6_ctlinput(int, const struct sockaddr *, void *);
int rip6_ctloutput(int, struct socket *, struct sockopt *);
int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *,
struct mbuf *);
int rip6_attach(struct socket *, int);
int rip6_usrreq(struct socket *,
int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
int dest6_input(struct mbuf **, int *, int);
int none_input(struct mbuf **, int *, int);
struct route;
int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *,
struct ip6_moptions *, struct route *, struct in6_addr *,
struct ifnet **, struct psref *, struct in6_addr *);
int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
struct route **, struct rtentry **, bool);
int ip6_get_membership(const struct sockopt *, struct ifnet **,
struct psref *, void *, size_t);
static __inline uint32_t
ip6_randomid(void)
{
return cprng_fast32();
}
static __inline uint32_t
ip6_randomflowlabel(void)
{
return cprng_fast32() & 0xfffff;
}
static __inline bool
ip6_dad_enabled(void)
{
return ip6_dad_count > 0;
}
#endif /* _KERNEL */
#endif /* !_NETINET6_IP6_VAR_H_ */
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