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/*
*------------------------------------------------------------------
* Copyright (c) 2018 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*------------------------------------------------------------------
*/
#ifndef __IGMP_GROUP_H__
#define __IGMP_GROUP_H__
#include <igmp/igmp_types.h>
#include <igmp/igmp_src.h>
/**
* QUERY_REPLY = Timer running to reply to a G/SG specific query
* QUERY_SENT = wait for response from a sent G/SG specific query.
* Sent when a host leaves a group
* RESEND_REPORT = Timer running to resend report
* FILTER_MODE_CHANGE = to check if the group can swap to
* INCLUDE mode (section 6.2.2)
*/
#define foreach_igmp_group_timer \
_(QUERY_REPLY, "query-reply") \
_(QUERY_SENT, "query-sent") \
_(RESEND_REPORT, "resend-report") \
_(FILTER_MODE_CHANGE, "filter-mode-change")
/**
* Types of timers maintained for each group
*/
typedef enum igmp_group_timer_type_t_
{
#define _(v,s) IGMP_GROUP_TIMER_##v,
foreach_igmp_group_timer
#undef _
} igmp_group_timer_type_t;
#define IGMP_GROUP_N_TIMERS (IGMP_GROUP_TIMER_FILTER_MODE_CHANGE + 1)
extern u8 *format_igmp_group_timer_type (u8 * s, va_list * args);
/**
* @brief IGMP group
* A multicast group address for which reception has been requested.
*/
typedef struct igmp_group_t_
{
/** The group's key within the per-interface config */
igmp_key_t *key;
/**
* A vector of running timers for the group. this can include:
* - group-specific query, sent on reception of a host 'leave'
* - filter-mode change timer, to check if the group can swap to
* INCLUDE mode (section 6.2.2)
*/
u32 timers[IGMP_GROUP_N_TIMERS];
/**
* The current filter mode of the group (see 6.2.1)
*/
igmp_filter_mode_t router_filter_mode;
/**
* The pool index of the config object this group is in
*/
u32 config;
/**
* The number of times the last report has been sent
*/
u32 n_reports_sent;
/**
* Source list per-filter mode
*/
uword *igmp_src_by_key[IGMP_N_FILTER_MODES];
} igmp_group_t;
#define FOR_EACH_SRC(_src, _group, _filter, _body) \
do { \
igmp_key_t *__key__; \
u32 __sid__; \
hash_foreach_mem(__key__, __sid__, ((igmp_group_t*)_group)->igmp_src_by_key[(_filter)], \
({ \
_src = pool_elt_at_index(igmp_main.srcs, __sid__); \
do { _body; } while (0); \
})); \
} while (0);
/**
* Forward declarations
*/
struct igmp_config_t_;
extern void igmp_group_clear (igmp_group_t * group);
extern void igmp_group_free_all_srcs (igmp_group_t * group);
extern igmp_group_t *igmp_group_alloc (struct igmp_config_t_ *config,
const igmp_key_t * gkey,
igmp_filter_mode_t mode);
extern igmp_src_t *igmp_group_src_update (igmp_group_t * group,
const igmp_key_t * skey,
igmp_mode_t mode);
extern void igmp_group_src_remove (igmp_group_t * group, igmp_src_t * src);
extern u8 *format_igmp_group (u8 * s, va_list * args);
extern ip46_address_t *igmp_group_present_minus_new (igmp_group_t * group,
igmp_filter_mode_t mode,
const ip46_address_t *
saddrs);
extern ip46_address_t *igmp_group_new_minus_present (igmp_group_t * group,
igmp_filter_mode_t mode,
const ip46_address_t *
saddrs);
extern ip46_address_t *igmp_group_new_intersect_present (igmp_group_t * group,
igmp_filter_mode_t
mode,
const ip46_address_t
* saddrs);
extern u32 igmp_group_n_srcs (const igmp_group_t * group,
igmp_filter_mode_t mode);
/** \brief igmp group lookup
@param group - igmp group
@param key - igmp key
*/
extern igmp_src_t *igmp_src_lookup (igmp_group_t * group,
const igmp_key_t * key);
extern u32 igmp_group_index (const igmp_group_t * g);
extern igmp_group_t *igmp_group_get (u32 index);
#endif
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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