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darling-xnu/bsd/netinet6/mld6_var.h
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2023-05-16 21:41:14 -07:00

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/*
* Copyright (c) 2000-2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* $FreeBSD: src/sys/netinet6/mld6_var.h,v 1.1.2.1 2000/07/15 07:14:36 kris Exp $ */
/* $KAME: mld6_var.h,v 1.4 2000/03/25 07:23:54 sumikawa Exp $ */
/*
* Copyright (C) 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.
*/
#ifndef _NETINET6_MLD6_VAR_H_
#define _NETINET6_MLD6_VAR_H_
#include <sys/appleapiopts.h>
/*
* Multicast Listener Discovery (MLD)
* implementation-specific definitions.
*/
#ifdef PRIVATE
/*
* Per-link MLD state.
*/
#ifndef XNU_KERNEL_PRIVATE
struct mld_ifinfo {
#else
struct mld_ifinfo_u {
#endif /* XNU_KERNEL_PRIVATE */
uint32_t mli_ifindex; /* interface this instance belongs to */
uint32_t mli_version; /* MLDv1 Host Compatibility Mode */
uint32_t mli_v1_timer; /* MLDv1 Querier Present timer (s) */
uint32_t mli_v2_timer; /* MLDv2 General Query (interface) timer (s)*/
uint32_t mli_flags; /* MLD per-interface flags */
uint32_t mli_rv; /* MLDv2 Robustness Variable */
uint32_t mli_qi; /* MLDv2 Query Interval (s) */
uint32_t mli_qri; /* MLDv2 Query Response Interval (s) */
uint32_t mli_uri; /* MLDv2 Unsolicited Report Interval (s) */
uint32_t _pad;
};
#define MLIF_SILENT 0x00000001 /* Do not use MLD on this ifp */
#define MLIF_USEALLOW 0x00000002 /* Use ALLOW/BLOCK for joins/leaves */
#define MLIF_PROCESSED 0x00000004 /* Entry has been processed and can be skipped */
/*
* MLD version tag.
*/
#define MLD_VERSION_NONE 0 /* Invalid */
#define MLD_VERSION_1 1
#define MLD_VERSION_2 2 /* Default */
#endif /* PRIVATE */
#ifdef BSD_KERNEL_PRIVATE
#include <sys/syslog.h>
#define MLD_DEBUG 1
#ifdef MLD_DEBUG
extern int mld_debug;
#define MLD_PRINTF(x) do { if (mld_debug) printf x; } while (0)
#else
#define MLD_PRINTF(x)
#endif
#define MLD_RANDOM_DELAY(X) (RandomULong() % (X) + 1)
#define MLD_MAX_STATE_CHANGES 24 /* Max pending changes per group */
/*
* MLD per-group states.
*/
#define MLD_NOT_MEMBER 0 /* Can garbage collect group */
#define MLD_SILENT_MEMBER 1 /* Do not perform MLD for group */
#define MLD_REPORTING_MEMBER 2 /* MLDv1 we are reporter */
#define MLD_IDLE_MEMBER 3 /* MLDv1 we reported last */
#define MLD_LAZY_MEMBER 4 /* MLDv1 other member reporting */
#define MLD_SLEEPING_MEMBER 5 /* MLDv1 start query response */
#define MLD_AWAKENING_MEMBER 6 /* MLDv1 group timer will start */
#define MLD_G_QUERY_PENDING_MEMBER 7 /* MLDv2 group query pending */
#define MLD_SG_QUERY_PENDING_MEMBER 8 /* MLDv2 source query pending */
#define MLD_LEAVING_MEMBER 9 /* MLDv2 dying gasp (pending last */
/* retransmission of INCLUDE {}) */
/*
* MLDv2 protocol control variables.
*/
#define MLD_RV_INIT 2 /* Robustness Variable */
#define MLD_RV_MIN 1
#define MLD_RV_MAX 7
#define MLD_QI_INIT 125 /* Query Interval (s) */
#define MLD_QI_MIN 1
#define MLD_QI_MAX 255
#define MLD_QRI_INIT 10 /* Query Response Interval (s) */
#define MLD_QRI_MIN 1
#define MLD_QRI_MAX 255
#define MLD_URI_INIT 3 /* Unsolicited Report Interval (s) */
#define MLD_URI_MIN 0
#define MLD_URI_MAX 10
#define MLD_MAX_GS_SOURCES 256 /* # of sources in rx GS query */
#define MLD_MAX_G_GS_PACKETS 8 /* # of packets to answer G/GS */
#define MLD_MAX_STATE_CHANGE_PACKETS 8 /* # of packets per state change */
#define MLD_MAX_RESPONSE_PACKETS 16 /* # of packets for general query */
#define MLD_MAX_RESPONSE_BURST 4 /* # of responses to send at once */
#define MLD_RESPONSE_BURST_INTERVAL 1 /* 1 second */
/*
* MLD-specific mbuf flags.
*/
#define M_MLDV1 M_PROTO1 /* Packet is MLDv1 */
#define M_GROUPREC M_PROTO3 /* mbuf chain is a group record */
/*
* Leading space for MLDv2 reports inside MTU.
*
* NOTE: This differs from IGMPv3 significantly. KAME IPv6 requires
* that a fully formed mbuf chain *without* the Router Alert option
* is passed to ip6_output(), however we must account for it in the
* MTU if we need to split an MLDv2 report into several packets.
*
* We now put the MLDv2 report header in the initial mbuf containing
* the IPv6 header.
*/
#define MLD_MTUSPACE (sizeof(struct ip6_hdr) + sizeof(struct mld_raopt) + \
sizeof(struct icmp6_hdr))
struct mld_ifinfo {
decl_lck_mtx_data(, mli_lock);
uint32_t mli_refcnt; /* reference count */
uint32_t mli_debug; /* see ifa_debug flags */
LIST_ENTRY(mld_ifinfo) mli_link;
struct ifnet *mli_ifp; /* interface this instance belongs to */
uint32_t mli_version; /* MLDv1 Host Compatibility Mode */
uint32_t mli_v1_timer; /* MLDv1 Querier Present timer (s) */
uint32_t mli_v2_timer; /* MLDv2 General Query (interface) timer (s)*/
uint32_t mli_flags; /* MLD per-interface flags */
uint32_t mli_rv; /* MLDv2 Robustness Variable */
uint32_t mli_qi; /* MLDv2 Query Interval (s) */
uint32_t mli_qri; /* MLDv2 Query Response Interval (s) */
uint32_t mli_uri; /* MLDv2 Unsolicited Report Interval (s) */
SLIST_HEAD(, in6_multi) mli_relinmhead; /* released groups */
struct ifqueue mli_gq; /* queue of general query responses */
struct ifqueue mli_v1q; /* MLDv1 message queue */
};
#define MLI_LOCK_ASSERT_HELD(_mli) \
LCK_MTX_ASSERT(&(_mli)->mli_lock, LCK_MTX_ASSERT_OWNED)
#define MLI_LOCK_ASSERT_NOTHELD(_mli) \
LCK_MTX_ASSERT(&(_mli)->mli_lock, LCK_MTX_ASSERT_NOTOWNED)
#define MLI_LOCK(_mli) \
lck_mtx_lock(&(_mli)->mli_lock)
#define MLI_LOCK_SPIN(_mli) \
lck_mtx_lock_spin(&(_mli)->mli_lock)
#define MLI_CONVERT_LOCK(_mli) do { \
MLI_LOCK_ASSERT_HELD(_mli); \
lck_mtx_convert_spin(&(_mli)->mli_lock); \
} while (0)
#define MLI_UNLOCK(_mli) \
lck_mtx_unlock(&(_mli)->mli_lock)
#define MLI_ADDREF(_mli) \
mli_addref(_mli, 0)
#define MLI_ADDREF_LOCKED(_mli) \
mli_addref(_mli, 1)
#define MLI_REMREF(_mli) \
mli_remref(_mli)
/*
* Per-link MLD context.
*/
#define MLD_IFINFO(ifp) ((ifp)->if_mli)
/*
* MLD timer schedule parameters
*/
struct mld_tparams {
int qpt; /* querier_present_timers_running6 */
int it; /* interface_timers_running6 */
int cst; /* current_state_timers_running6 */
int sct; /* state_change_timers_running6 */
};
extern int mld_change_state(struct in6_multi *, struct mld_tparams *,
const int);
extern struct mld_ifinfo *mld_domifattach(struct ifnet *, zalloc_flags_t);
extern void mld_domifreattach(struct mld_ifinfo *);
extern void mld_domifdetach(struct ifnet *);
extern void mld_fasttimo(void);
extern void mld_ifdetach(struct ifnet *);
extern int mld_input(struct mbuf *, int, int);
extern void mld_init(void);
extern void mld_set_timeout(struct mld_tparams *);
extern void mli_addref(struct mld_ifinfo *, int);
extern void mli_remref(struct mld_ifinfo *);
__private_extern__ void mld6_initsilent(struct ifnet *, struct mld_ifinfo *);
#ifdef SYSCTL_DECL
SYSCTL_DECL(_net_inet6_mld);
#endif
#endif /* BSD_KERNEL_PRIVATE */
#endif /* _NETINET6_MLD6_VAR_H_ */
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