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freebsd-nq/sys/netinet6/in6_var.h
Andrey V. Elsukov 5a1842a24a Add ip6_tryforward() - a run to completion forwarding implementation 
for IPv6.

It gets performance benefits from reduced number of checks. It doesn't
copy mbuf to be able send ICMPv6 error message, because it keeps mbuf
unchanged until the moment, when the route decision has been made.
It doesn't do IPsec checks, and when some IPsec security policies present,
ip6_input() uses normal slow path.

Reviewed by:	bz, gnn
Obtained from:	Yandex LLC
MFC after:	1 month
Sponsored by:	Yandex LLC
Differential Revision:	https://reviews.freebsd.org/D8527
2016-12-12 10:57:32 +00:00

833 lines
30 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: in6_var.h,v 1.56 2001/03/29 05:34:31 itojun Exp $
*/
/*-
* Copyright (c) 1985, 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.
*
* @(#)in_var.h 8.1 (Berkeley) 6/10/93
* $FreeBSD$
*/
#ifndef _NETINET6_IN6_VAR_H_
#define _NETINET6_IN6_VAR_H_
#include <sys/tree.h>
#include <sys/counter.h>
#ifdef _KERNEL
#include <sys/fnv_hash.h>
#include <sys/libkern.h>
#endif
/*
* Interface address, Internet version. One of these structures
* is allocated for each interface with an Internet address.
* The ifaddr structure contains the protocol-independent part
* of the structure and is assumed to be first.
*/
/*
* pltime/vltime are just for future reference (required to implements 2
* hour rule for hosts). they should never be modified by nd6_timeout or
* anywhere else.
* userland -> kernel: accept pltime/vltime
* kernel -> userland: throw up everything
* in kernel: modify preferred/expire only
*/
struct in6_addrlifetime {
time_t ia6t_expire; /* valid lifetime expiration time */
time_t ia6t_preferred; /* preferred lifetime expiration time */
u_int32_t ia6t_vltime; /* valid lifetime */
u_int32_t ia6t_pltime; /* prefix lifetime */
};
struct nd_ifinfo;
struct scope6_id;
struct lltable;
struct mld_ifsoftc;
struct in6_ifextra {
counter_u64_t *in6_ifstat;
counter_u64_t *icmp6_ifstat;
struct nd_ifinfo *nd_ifinfo;
struct scope6_id *scope6_id;
struct lltable *lltable;
struct mld_ifsoftc *mld_ifinfo;
};
#define LLTABLE6(ifp) (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->lltable)
#ifdef _KERNEL
struct in6_ifaddr {
struct ifaddr ia_ifa; /* protocol-independent info */
#define ia_ifp ia_ifa.ifa_ifp
#define ia_flags ia_ifa.ifa_flags
struct sockaddr_in6 ia_addr; /* interface address */
struct sockaddr_in6 ia_net; /* network number of interface */
struct sockaddr_in6 ia_dstaddr; /* space for destination addr */
struct sockaddr_in6 ia_prefixmask; /* prefix mask */
u_int32_t ia_plen; /* prefix length */
TAILQ_ENTRY(in6_ifaddr) ia_link; /* list of IPv6 addresses */
int ia6_flags;
struct in6_addrlifetime ia6_lifetime;
time_t ia6_createtime; /* the creation time of this address, which is
* currently used for temporary addresses only.
*/
time_t ia6_updatetime;
/* back pointer to the ND prefix (for autoconfigured addresses only) */
struct nd_prefix *ia6_ndpr;
/* multicast addresses joined from the kernel */
LIST_HEAD(, in6_multi_mship) ia6_memberships;
/* entry in bucket of inet6 addresses */
LIST_ENTRY(in6_ifaddr) ia6_hash;
};
/* List of in6_ifaddr's. */
TAILQ_HEAD(in6_ifaddrhead, in6_ifaddr);
LIST_HEAD(in6_ifaddrlisthead, in6_ifaddr);
#endif /* _KERNEL */
/* control structure to manage address selection policy */
struct in6_addrpolicy {
struct sockaddr_in6 addr; /* prefix address */
struct sockaddr_in6 addrmask; /* prefix mask */
int preced; /* precedence */
int label; /* matching label */
u_quad_t use; /* statistics */
};
/*
* IPv6 interface statistics, as defined in RFC2465 Ipv6IfStatsEntry (p12).
*/
struct in6_ifstat {
uint64_t ifs6_in_receive; /* # of total input datagram */
uint64_t ifs6_in_hdrerr; /* # of datagrams with invalid hdr */
uint64_t ifs6_in_toobig; /* # of datagrams exceeded MTU */
uint64_t ifs6_in_noroute; /* # of datagrams with no route */
uint64_t ifs6_in_addrerr; /* # of datagrams with invalid dst */
uint64_t ifs6_in_protounknown; /* # of datagrams with unknown proto */
/* NOTE: increment on final dst if */
uint64_t ifs6_in_truncated; /* # of truncated datagrams */
uint64_t ifs6_in_discard; /* # of discarded datagrams */
/* NOTE: fragment timeout is not here */
uint64_t ifs6_in_deliver; /* # of datagrams delivered to ULP */
/* NOTE: increment on final dst if */
uint64_t ifs6_out_forward; /* # of datagrams forwarded */
/* NOTE: increment on outgoing if */
uint64_t ifs6_out_request; /* # of outgoing datagrams from ULP */
/* NOTE: does not include forwrads */
uint64_t ifs6_out_discard; /* # of discarded datagrams */
uint64_t ifs6_out_fragok; /* # of datagrams fragmented */
uint64_t ifs6_out_fragfail; /* # of datagrams failed on fragment */
uint64_t ifs6_out_fragcreat; /* # of fragment datagrams */
/* NOTE: this is # after fragment */
uint64_t ifs6_reass_reqd; /* # of incoming fragmented packets */
/* NOTE: increment on final dst if */
uint64_t ifs6_reass_ok; /* # of reassembled packets */
/* NOTE: this is # after reass */
/* NOTE: increment on final dst if */
uint64_t ifs6_reass_fail; /* # of reass failures */
/* NOTE: may not be packet count */
/* NOTE: increment on final dst if */
uint64_t ifs6_in_mcast; /* # of inbound multicast datagrams */
uint64_t ifs6_out_mcast; /* # of outbound multicast datagrams */
};
/*
* ICMPv6 interface statistics, as defined in RFC2466 Ipv6IfIcmpEntry.
* XXX: I'm not sure if this file is the right place for this structure...
*/
struct icmp6_ifstat {
/*
* Input statistics
*/
/* ipv6IfIcmpInMsgs, total # of input messages */
uint64_t ifs6_in_msg;
/* ipv6IfIcmpInErrors, # of input error messages */
uint64_t ifs6_in_error;
/* ipv6IfIcmpInDestUnreachs, # of input dest unreach errors */
uint64_t ifs6_in_dstunreach;
/* ipv6IfIcmpInAdminProhibs, # of input administratively prohibited errs */
uint64_t ifs6_in_adminprohib;
/* ipv6IfIcmpInTimeExcds, # of input time exceeded errors */
uint64_t ifs6_in_timeexceed;
/* ipv6IfIcmpInParmProblems, # of input parameter problem errors */
uint64_t ifs6_in_paramprob;
/* ipv6IfIcmpInPktTooBigs, # of input packet too big errors */
uint64_t ifs6_in_pkttoobig;
/* ipv6IfIcmpInEchos, # of input echo requests */
uint64_t ifs6_in_echo;
/* ipv6IfIcmpInEchoReplies, # of input echo replies */
uint64_t ifs6_in_echoreply;
/* ipv6IfIcmpInRouterSolicits, # of input router solicitations */
uint64_t ifs6_in_routersolicit;
/* ipv6IfIcmpInRouterAdvertisements, # of input router advertisements */
uint64_t ifs6_in_routeradvert;
/* ipv6IfIcmpInNeighborSolicits, # of input neighbor solicitations */
uint64_t ifs6_in_neighborsolicit;
/* ipv6IfIcmpInNeighborAdvertisements, # of input neighbor advertisements */
uint64_t ifs6_in_neighboradvert;
/* ipv6IfIcmpInRedirects, # of input redirects */
uint64_t ifs6_in_redirect;
/* ipv6IfIcmpInGroupMembQueries, # of input MLD queries */
uint64_t ifs6_in_mldquery;
/* ipv6IfIcmpInGroupMembResponses, # of input MLD reports */
uint64_t ifs6_in_mldreport;
/* ipv6IfIcmpInGroupMembReductions, # of input MLD done */
uint64_t ifs6_in_mlddone;
/*
* Output statistics. We should solve unresolved routing problem...
*/
/* ipv6IfIcmpOutMsgs, total # of output messages */
uint64_t ifs6_out_msg;
/* ipv6IfIcmpOutErrors, # of output error messages */
uint64_t ifs6_out_error;
/* ipv6IfIcmpOutDestUnreachs, # of output dest unreach errors */
uint64_t ifs6_out_dstunreach;
/* ipv6IfIcmpOutAdminProhibs, # of output administratively prohibited errs */
uint64_t ifs6_out_adminprohib;
/* ipv6IfIcmpOutTimeExcds, # of output time exceeded errors */
uint64_t ifs6_out_timeexceed;
/* ipv6IfIcmpOutParmProblems, # of output parameter problem errors */
uint64_t ifs6_out_paramprob;
/* ipv6IfIcmpOutPktTooBigs, # of output packet too big errors */
uint64_t ifs6_out_pkttoobig;
/* ipv6IfIcmpOutEchos, # of output echo requests */
uint64_t ifs6_out_echo;
/* ipv6IfIcmpOutEchoReplies, # of output echo replies */
uint64_t ifs6_out_echoreply;
/* ipv6IfIcmpOutRouterSolicits, # of output router solicitations */
uint64_t ifs6_out_routersolicit;
/* ipv6IfIcmpOutRouterAdvertisements, # of output router advertisements */
uint64_t ifs6_out_routeradvert;
/* ipv6IfIcmpOutNeighborSolicits, # of output neighbor solicitations */
uint64_t ifs6_out_neighborsolicit;
/* ipv6IfIcmpOutNeighborAdvertisements, # of output neighbor advertisements */
uint64_t ifs6_out_neighboradvert;
/* ipv6IfIcmpOutRedirects, # of output redirects */
uint64_t ifs6_out_redirect;
/* ipv6IfIcmpOutGroupMembQueries, # of output MLD queries */
uint64_t ifs6_out_mldquery;
/* ipv6IfIcmpOutGroupMembResponses, # of output MLD reports */
uint64_t ifs6_out_mldreport;
/* ipv6IfIcmpOutGroupMembReductions, # of output MLD done */
uint64_t ifs6_out_mlddone;
};
struct in6_ifreq {
char ifr_name[IFNAMSIZ];
union {
struct sockaddr_in6 ifru_addr;
struct sockaddr_in6 ifru_dstaddr;
int ifru_flags;
int ifru_flags6;
int ifru_metric;
caddr_t ifru_data;
struct in6_addrlifetime ifru_lifetime;
struct in6_ifstat ifru_stat;
struct icmp6_ifstat ifru_icmp6stat;
u_int32_t ifru_scope_id[16];
} ifr_ifru;
};
struct in6_aliasreq {
char ifra_name[IFNAMSIZ];
struct sockaddr_in6 ifra_addr;
struct sockaddr_in6 ifra_dstaddr;
struct sockaddr_in6 ifra_prefixmask;
int ifra_flags;
struct in6_addrlifetime ifra_lifetime;
int ifra_vhid;
};
/* pre-10.x compat */
struct oin6_aliasreq {
char ifra_name[IFNAMSIZ];
struct sockaddr_in6 ifra_addr;
struct sockaddr_in6 ifra_dstaddr;
struct sockaddr_in6 ifra_prefixmask;
int ifra_flags;
struct in6_addrlifetime ifra_lifetime;
};
/* prefix type macro */
#define IN6_PREFIX_ND 1
#define IN6_PREFIX_RR 2
/*
* prefix related flags passed between kernel(NDP related part) and
* user land command(ifconfig) and daemon(rtadvd).
*/
struct in6_prflags {
struct prf_ra {
u_char onlink : 1;
u_char autonomous : 1;
u_char reserved : 6;
} prf_ra;
u_char prf_reserved1;
u_short prf_reserved2;
/* want to put this on 4byte offset */
struct prf_rr {
u_char decrvalid : 1;
u_char decrprefd : 1;
u_char reserved : 6;
} prf_rr;
u_char prf_reserved3;
u_short prf_reserved4;
};
struct in6_prefixreq {
char ipr_name[IFNAMSIZ];
u_char ipr_origin;
u_char ipr_plen;
u_int32_t ipr_vltime;
u_int32_t ipr_pltime;
struct in6_prflags ipr_flags;
struct sockaddr_in6 ipr_prefix;
};
#define PR_ORIG_RA 0
#define PR_ORIG_RR 1
#define PR_ORIG_STATIC 2
#define PR_ORIG_KERNEL 3
#define ipr_raf_onlink ipr_flags.prf_ra.onlink
#define ipr_raf_auto ipr_flags.prf_ra.autonomous
#define ipr_statef_onlink ipr_flags.prf_state.onlink
#define ipr_rrf_decrvalid ipr_flags.prf_rr.decrvalid
#define ipr_rrf_decrprefd ipr_flags.prf_rr.decrprefd
struct in6_rrenumreq {
char irr_name[IFNAMSIZ];
u_char irr_origin;
u_char irr_m_len; /* match len for matchprefix */
u_char irr_m_minlen; /* minlen for matching prefix */
u_char irr_m_maxlen; /* maxlen for matching prefix */
u_char irr_u_uselen; /* uselen for adding prefix */
u_char irr_u_keeplen; /* keeplen from matching prefix */
struct irr_raflagmask {
u_char onlink : 1;
u_char autonomous : 1;
u_char reserved : 6;
} irr_raflagmask;
u_int32_t irr_vltime;
u_int32_t irr_pltime;
struct in6_prflags irr_flags;
struct sockaddr_in6 irr_matchprefix;
struct sockaddr_in6 irr_useprefix;
};
#define irr_raf_mask_onlink irr_raflagmask.onlink
#define irr_raf_mask_auto irr_raflagmask.autonomous
#define irr_raf_mask_reserved irr_raflagmask.reserved
#define irr_raf_onlink irr_flags.prf_ra.onlink
#define irr_raf_auto irr_flags.prf_ra.autonomous
#define irr_statef_onlink irr_flags.prf_state.onlink
#define irr_rrf irr_flags.prf_rr
#define irr_rrf_decrvalid irr_flags.prf_rr.decrvalid
#define irr_rrf_decrprefd irr_flags.prf_rr.decrprefd
/*
* Given a pointer to an in6_ifaddr (ifaddr),
* return a pointer to the addr as a sockaddr_in6
*/
#define IA6_IN6(ia) (&((ia)->ia_addr.sin6_addr))
#define IA6_DSTIN6(ia) (&((ia)->ia_dstaddr.sin6_addr))
#define IA6_MASKIN6(ia) (&((ia)->ia_prefixmask.sin6_addr))
#define IA6_SIN6(ia) (&((ia)->ia_addr))
#define IA6_DSTSIN6(ia) (&((ia)->ia_dstaddr))
#define IFA_IN6(x) (&((struct sockaddr_in6 *)((x)->ifa_addr))->sin6_addr)
#define IFA_DSTIN6(x) (&((struct sockaddr_in6 *)((x)->ifa_dstaddr))->sin6_addr)
#define IFPR_IN6(x) (&((struct sockaddr_in6 *)((x)->ifpr_prefix))->sin6_addr)
#ifdef _KERNEL
#define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \
(((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \
(((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \
(((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \
(((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 )
#define IN6_MASK_ADDR(a, m) do { \
(a)->s6_addr32[0] &= (m)->s6_addr32[0]; \
(a)->s6_addr32[1] &= (m)->s6_addr32[1]; \
(a)->s6_addr32[2] &= (m)->s6_addr32[2]; \
(a)->s6_addr32[3] &= (m)->s6_addr32[3]; \
} while (0)
#endif
#define SIOCSIFADDR_IN6 _IOW('i', 12, struct in6_ifreq)
#define SIOCGIFADDR_IN6 _IOWR('i', 33, struct in6_ifreq)
#ifdef _KERNEL
/*
* SIOCSxxx ioctls should be unused (see comments in in6.c), but
* we do not shift numbers for binary compatibility.
*/
#define SIOCSIFDSTADDR_IN6 _IOW('i', 14, struct in6_ifreq)
#define SIOCSIFNETMASK_IN6 _IOW('i', 22, struct in6_ifreq)
#endif
#define SIOCGIFDSTADDR_IN6 _IOWR('i', 34, struct in6_ifreq)
#define SIOCGIFNETMASK_IN6 _IOWR('i', 37, struct in6_ifreq)
#define SIOCDIFADDR_IN6 _IOW('i', 25, struct in6_ifreq)
#define OSIOCAIFADDR_IN6 _IOW('i', 26, struct oin6_aliasreq)
#define SIOCAIFADDR_IN6 _IOW('i', 27, struct in6_aliasreq)
#define SIOCSIFPHYADDR_IN6 _IOW('i', 70, struct in6_aliasreq)
#define SIOCGIFPSRCADDR_IN6 _IOWR('i', 71, struct in6_ifreq)
#define SIOCGIFPDSTADDR_IN6 _IOWR('i', 72, struct in6_ifreq)
#define SIOCGIFAFLAG_IN6 _IOWR('i', 73, struct in6_ifreq)
#ifdef _KERNEL
#define OSIOCGIFINFO_IN6 _IOWR('i', 76, struct in6_ondireq)
#endif
#define SIOCGIFINFO_IN6 _IOWR('i', 108, struct in6_ndireq)
#define SIOCSIFINFO_IN6 _IOWR('i', 109, struct in6_ndireq)
#define SIOCSNDFLUSH_IN6 _IOWR('i', 77, struct in6_ifreq)
#define SIOCGNBRINFO_IN6 _IOWR('i', 78, struct in6_nbrinfo)
#define SIOCSPFXFLUSH_IN6 _IOWR('i', 79, struct in6_ifreq)
#define SIOCSRTRFLUSH_IN6 _IOWR('i', 80, struct in6_ifreq)
#define SIOCGIFALIFETIME_IN6 _IOWR('i', 81, struct in6_ifreq)
#define SIOCGIFSTAT_IN6 _IOWR('i', 83, struct in6_ifreq)
#define SIOCGIFSTAT_ICMP6 _IOWR('i', 84, struct in6_ifreq)
#define SIOCSDEFIFACE_IN6 _IOWR('i', 85, struct in6_ndifreq)
#define SIOCGDEFIFACE_IN6 _IOWR('i', 86, struct in6_ndifreq)
#define SIOCSIFINFO_FLAGS _IOWR('i', 87, struct in6_ndireq) /* XXX */
#define SIOCSSCOPE6 _IOW('i', 88, struct in6_ifreq)
#define SIOCGSCOPE6 _IOWR('i', 89, struct in6_ifreq)
#define SIOCGSCOPE6DEF _IOWR('i', 90, struct in6_ifreq)
#define SIOCSIFPREFIX_IN6 _IOW('i', 100, struct in6_prefixreq) /* set */
#define SIOCGIFPREFIX_IN6 _IOWR('i', 101, struct in6_prefixreq) /* get */
#define SIOCDIFPREFIX_IN6 _IOW('i', 102, struct in6_prefixreq) /* del */
#define SIOCAIFPREFIX_IN6 _IOW('i', 103, struct in6_rrenumreq) /* add */
#define SIOCCIFPREFIX_IN6 _IOW('i', 104, \
struct in6_rrenumreq) /* change */
#define SIOCSGIFPREFIX_IN6 _IOW('i', 105, \
struct in6_rrenumreq) /* set global */
#define SIOCGETSGCNT_IN6 _IOWR('u', 106, \
struct sioc_sg_req6) /* get s,g pkt cnt */
#define SIOCGETMIFCNT_IN6 _IOWR('u', 107, \
struct sioc_mif_req6) /* get pkt cnt per if */
#define SIOCAADDRCTL_POLICY _IOW('u', 108, struct in6_addrpolicy)
#define SIOCDADDRCTL_POLICY _IOW('u', 109, struct in6_addrpolicy)
#define IN6_IFF_ANYCAST 0x01 /* anycast address */
#define IN6_IFF_TENTATIVE 0x02 /* tentative address */
#define IN6_IFF_DUPLICATED 0x04 /* DAD detected duplicate */
#define IN6_IFF_DETACHED 0x08 /* may be detached from the link */
#define IN6_IFF_DEPRECATED 0x10 /* deprecated address */
#define IN6_IFF_NODAD 0x20 /* don't perform DAD on this address
* (obsolete)
*/
#define IN6_IFF_AUTOCONF 0x40 /* autoconfigurable address. */
#define IN6_IFF_TEMPORARY 0x80 /* temporary (anonymous) address. */
#define IN6_IFF_PREFER_SOURCE 0x0100 /* preferred address for SAS */
/* do not input/output */
#define IN6_IFF_NOTREADY (IN6_IFF_TENTATIVE|IN6_IFF_DUPLICATED)
#ifdef _KERNEL
#define IN6_ARE_SCOPE_CMP(a,b) ((a)-(b))
#define IN6_ARE_SCOPE_EQUAL(a,b) ((a)==(b))
#endif
#ifdef _KERNEL
VNET_DECLARE(struct in6_ifaddrhead, in6_ifaddrhead);
VNET_DECLARE(struct in6_ifaddrlisthead *, in6_ifaddrhashtbl);
VNET_DECLARE(u_long, in6_ifaddrhmask);
#define V_in6_ifaddrhead VNET(in6_ifaddrhead)
#define V_in6_ifaddrhashtbl VNET(in6_ifaddrhashtbl)
#define V_in6_ifaddrhmask VNET(in6_ifaddrhmask)
#define IN6ADDR_NHASH_LOG2 8
#define IN6ADDR_NHASH (1 << IN6ADDR_NHASH_LOG2)
#define IN6ADDR_HASHVAL(x) (in6_addrhash(x))
#define IN6ADDR_HASH(x) \
(&V_in6_ifaddrhashtbl[IN6ADDR_HASHVAL(x) & V_in6_ifaddrhmask])
static __inline uint32_t
in6_addrhash(const struct in6_addr *in6)
{
uint32_t x;
x = in6->s6_addr32[0] ^ in6->s6_addr32[1] ^ in6->s6_addr32[2] ^
in6->s6_addr32[3];
return (fnv_32_buf(&x, sizeof(x), FNV1_32_INIT));
}
extern struct rmlock in6_ifaddr_lock;
#define IN6_IFADDR_LOCK_ASSERT() rm_assert(&in6_ifaddr_lock, RA_LOCKED)
#define IN6_IFADDR_RLOCK(t) rm_rlock(&in6_ifaddr_lock, (t))
#define IN6_IFADDR_RLOCK_ASSERT() rm_assert(&in6_ifaddr_lock, RA_RLOCKED)
#define IN6_IFADDR_RUNLOCK(t) rm_runlock(&in6_ifaddr_lock, (t))
#define IN6_IFADDR_WLOCK() rm_wlock(&in6_ifaddr_lock)
#define IN6_IFADDR_WLOCK_ASSERT() rm_assert(&in6_ifaddr_lock, RA_WLOCKED)
#define IN6_IFADDR_WUNLOCK() rm_wunlock(&in6_ifaddr_lock)
#define in6_ifstat_inc(ifp, tag) \
do { \
if (ifp) \
counter_u64_add(((struct in6_ifextra *) \
((ifp)->if_afdata[AF_INET6]))->in6_ifstat[ \
offsetof(struct in6_ifstat, tag) / sizeof(uint64_t)], 1);\
} while (/*CONSTCOND*/ 0)
extern u_char inet6ctlerrmap[];
VNET_DECLARE(unsigned long, in6_maxmtu);
#define V_in6_maxmtu VNET(in6_maxmtu)
#endif /* _KERNEL */
/*
* IPv6 multicast MLD-layer source entry.
*/
struct ip6_msource {
RB_ENTRY(ip6_msource) im6s_link; /* RB tree links */
struct in6_addr im6s_addr;
struct im6s_st {
uint16_t ex; /* # of exclusive members */
uint16_t in; /* # of inclusive members */
} im6s_st[2]; /* state at t0, t1 */
uint8_t im6s_stp; /* pending query */
};
RB_HEAD(ip6_msource_tree, ip6_msource);
/*
* IPv6 multicast PCB-layer source entry.
*
* NOTE: overlapping use of struct ip6_msource fields at start.
*/
struct in6_msource {
RB_ENTRY(ip6_msource) im6s_link; /* Common field */
struct in6_addr im6s_addr; /* Common field */
uint8_t im6sl_st[2]; /* state before/at commit */
};
#ifdef _KERNEL
/*
* IPv6 source tree comparison function.
*
* An ordered predicate is necessary; bcmp() is not documented to return
* an indication of order, memcmp() is, and is an ISO C99 requirement.
*/
static __inline int
ip6_msource_cmp(const struct ip6_msource *a, const struct ip6_msource *b)
{
return (memcmp(&a->im6s_addr, &b->im6s_addr, sizeof(struct in6_addr)));
}
RB_PROTOTYPE(ip6_msource_tree, ip6_msource, im6s_link, ip6_msource_cmp);
/*
* IPv6 multicast PCB-layer group filter descriptor.
*/
struct in6_mfilter {
struct ip6_msource_tree im6f_sources; /* source list for (S,G) */
u_long im6f_nsrc; /* # of source entries */
uint8_t im6f_st[2]; /* state before/at commit */
};
/*
* Legacy KAME IPv6 multicast membership descriptor.
*/
struct in6_multi_mship {
struct in6_multi *i6mm_maddr;
LIST_ENTRY(in6_multi_mship) i6mm_chain;
};
/*
* IPv6 group descriptor.
*
* For every entry on an ifnet's if_multiaddrs list which represents
* an IP multicast group, there is one of these structures.
*
* If any source filters are present, then a node will exist in the RB-tree
* to permit fast lookup by source whenever an operation takes place.
* This permits pre-order traversal when we issue reports.
* Source filter trees are kept separately from the socket layer to
* greatly simplify locking.
*
* When MLDv2 is active, in6m_timer is the response to group query timer.
* The state-change timer in6m_sctimer is separate; whenever state changes
* for the group the state change record is generated and transmitted,
* and kept if retransmissions are necessary.
*
* FUTURE: in6m_link is now only used when groups are being purged
* on a detaching ifnet. It could be demoted to a SLIST_ENTRY, but
* because it is at the very start of the struct, we can't do this
* w/o breaking the ABI for ifmcstat.
*/
struct in6_multi {
LIST_ENTRY(in6_multi) in6m_entry; /* list glue */
struct in6_addr in6m_addr; /* IPv6 multicast address */
struct ifnet *in6m_ifp; /* back pointer to ifnet */
struct ifmultiaddr *in6m_ifma; /* back pointer to ifmultiaddr */
u_int in6m_refcount; /* reference count */
u_int in6m_state; /* state of the membership */
u_int in6m_timer; /* MLD6 listener report timer */
/* New fields for MLDv2 follow. */
struct mld_ifsoftc *in6m_mli; /* MLD info */
SLIST_ENTRY(in6_multi) in6m_nrele; /* to-be-released by MLD */
struct ip6_msource_tree in6m_srcs; /* tree of sources */
u_long in6m_nsrc; /* # of tree entries */
struct mbufq in6m_scq; /* queue of pending
* state-change packets */
struct timeval in6m_lastgsrtv; /* last G-S-R query */
uint16_t in6m_sctimer; /* state-change timer */
uint16_t in6m_scrv; /* state-change rexmit count */
/*
* SSM state counters which track state at T0 (the time the last
* state-change report's RV timer went to zero) and T1
* (time of pending report, i.e. now).
* Used for computing MLDv2 state-change reports. Several refcounts
* are maintained here to optimize for common use-cases.
*/
struct in6m_st {
uint16_t iss_fmode; /* MLD filter mode */
uint16_t iss_asm; /* # of ASM listeners */
uint16_t iss_ex; /* # of exclusive members */
uint16_t iss_in; /* # of inclusive members */
uint16_t iss_rec; /* # of recorded sources */
} in6m_st[2]; /* state at t0, t1 */
};
/*
* Helper function to derive the filter mode on a source entry
* from its internal counters. Predicates are:
* A source is only excluded if all listeners exclude it.
* A source is only included if no listeners exclude it,
* and at least one listener includes it.
* May be used by ifmcstat(8).
*/
static __inline uint8_t
im6s_get_mode(const struct in6_multi *inm, const struct ip6_msource *ims,
uint8_t t)
{
t = !!t;
if (inm->in6m_st[t].iss_ex > 0 &&
inm->in6m_st[t].iss_ex == ims->im6s_st[t].ex)
return (MCAST_EXCLUDE);
else if (ims->im6s_st[t].in > 0 && ims->im6s_st[t].ex == 0)
return (MCAST_INCLUDE);
return (MCAST_UNDEFINED);
}
/*
* Lock macros for IPv6 layer multicast address lists. IPv6 lock goes
* before link layer multicast locks in the lock order. In most cases,
* consumers of IN_*_MULTI() macros should acquire the locks before
* calling them; users of the in_{add,del}multi() functions should not.
*/
extern struct mtx in6_multi_mtx;
#define IN6_MULTI_LOCK() mtx_lock(&in6_multi_mtx)
#define IN6_MULTI_UNLOCK() mtx_unlock(&in6_multi_mtx)
#define IN6_MULTI_LOCK_ASSERT() mtx_assert(&in6_multi_mtx, MA_OWNED)
#define IN6_MULTI_UNLOCK_ASSERT() mtx_assert(&in6_multi_mtx, MA_NOTOWNED)
/*
* Look up an in6_multi record for an IPv6 multicast address
* on the interface ifp.
* If no record found, return NULL.
*
* SMPng: The IN6_MULTI_LOCK and IF_ADDR_LOCK on ifp must be held.
*/
static __inline struct in6_multi *
in6m_lookup_locked(struct ifnet *ifp, const struct in6_addr *mcaddr)
{
struct ifmultiaddr *ifma;
struct in6_multi *inm;
IN6_MULTI_LOCK_ASSERT();
IF_ADDR_LOCK_ASSERT(ifp);
inm = NULL;
TAILQ_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) {
if (ifma->ifma_addr->sa_family == AF_INET6) {
inm = (struct in6_multi *)ifma->ifma_protospec;
if (IN6_ARE_ADDR_EQUAL(&inm->in6m_addr, mcaddr))
break;
inm = NULL;
}
}
return (inm);
}
/*
* Wrapper for in6m_lookup_locked().
*
* SMPng: Assumes that neithr the IN6_MULTI_LOCK() or IF_ADDR_LOCK() are held.
*/
static __inline struct in6_multi *
in6m_lookup(struct ifnet *ifp, const struct in6_addr *mcaddr)
{
struct in6_multi *inm;
IN6_MULTI_LOCK();
IF_ADDR_RLOCK(ifp);
inm = in6m_lookup_locked(ifp, mcaddr);
IF_ADDR_RUNLOCK(ifp);
IN6_MULTI_UNLOCK();
return (inm);
}
/* Acquire an in6_multi record. */
static __inline void
in6m_acquire_locked(struct in6_multi *inm)
{
IN6_MULTI_LOCK_ASSERT();
++inm->in6m_refcount;
}
struct ip6_moptions;
struct sockopt;
/* Multicast KPIs. */
int im6o_mc_filter(const struct ip6_moptions *, const struct ifnet *,
const struct sockaddr *, const struct sockaddr *);
int in6_mc_join(struct ifnet *, const struct in6_addr *,
struct in6_mfilter *, struct in6_multi **, int);
int in6_mc_join_locked(struct ifnet *, const struct in6_addr *,
struct in6_mfilter *, struct in6_multi **, int);
int in6_mc_leave(struct in6_multi *, struct in6_mfilter *);
int in6_mc_leave_locked(struct in6_multi *, struct in6_mfilter *);
void in6m_clear_recorded(struct in6_multi *);
void in6m_commit(struct in6_multi *);
void in6m_print(const struct in6_multi *);
int in6m_record_source(struct in6_multi *, const struct in6_addr *);
void in6m_release_locked(struct in6_multi *);
void ip6_freemoptions(struct ip6_moptions *);
int ip6_getmoptions(struct inpcb *, struct sockopt *);
int ip6_setmoptions(struct inpcb *, struct sockopt *);
/* Legacy KAME multicast KPIs. */
struct in6_multi_mship *
in6_joingroup(struct ifnet *, struct in6_addr *, int *, int);
int in6_leavegroup(struct in6_multi_mship *);
/* flags to in6_update_ifa */
#define IN6_IFAUPDATE_DADDELAY 0x1 /* first time to configure an address */
int in6_mask2len(struct in6_addr *, u_char *);
int in6_control(struct socket *, u_long, caddr_t, struct ifnet *,
struct thread *);
int in6_update_ifa(struct ifnet *, struct in6_aliasreq *,
struct in6_ifaddr *, int);
void in6_prepare_ifra(struct in6_aliasreq *, const struct in6_addr *,
const struct in6_addr *);
void in6_purgeaddr(struct ifaddr *);
int in6if_do_dad(struct ifnet *);
void in6_savemkludge(struct in6_ifaddr *);
void *in6_domifattach(struct ifnet *);
void in6_domifdetach(struct ifnet *, void *);
int in6_domifmtu(struct ifnet *);
void in6_setmaxmtu(void);
int in6_if2idlen(struct ifnet *);
struct in6_ifaddr *in6ifa_ifpforlinklocal(struct ifnet *, int);
struct in6_ifaddr *in6ifa_ifpwithaddr(struct ifnet *, const struct in6_addr *);
struct in6_ifaddr *in6ifa_ifwithaddr(const struct in6_addr *, uint32_t);
struct in6_ifaddr *in6ifa_llaonifp(struct ifnet *);
int in6_addr2zoneid(struct ifnet *, struct in6_addr *, u_int32_t *);
int in6_matchlen(struct in6_addr *, struct in6_addr *);
int in6_are_prefix_equal(struct in6_addr *, struct in6_addr *, int);
void in6_prefixlen2mask(struct in6_addr *, int);
int in6_prefix_ioctl(struct socket *, u_long, caddr_t,
struct ifnet *);
int in6_prefix_add_ifid(int, struct in6_ifaddr *);
void in6_prefix_remove_ifid(int, struct in6_ifaddr *);
void in6_purgeprefix(struct ifnet *);
int in6_is_addr_deprecated(struct sockaddr_in6 *);
int in6_src_ioctl(u_long, caddr_t);
void in6_newaddrmsg(struct in6_ifaddr *, int);
/*
* Extended API for IPv6 FIB support.
*/
struct mbuf *ip6_tryforward(struct mbuf *);
void in6_rtredirect(struct sockaddr *, struct sockaddr *, struct sockaddr *,
int, struct sockaddr *, u_int);
int in6_rtrequest(int, struct sockaddr *, struct sockaddr *,
struct sockaddr *, int, struct rtentry **, u_int);
void in6_rtalloc(struct route_in6 *, u_int);
void in6_rtalloc_ign(struct route_in6 *, u_long, u_int);
struct rtentry *in6_rtalloc1(struct sockaddr *, int, u_long, u_int);
#endif /* _KERNEL */
#endif /* _NETINET6_IN6_VAR_H_ */
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