109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/* neigh_cache.h
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*
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* Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* Author: Pau Espin Pedrol <pespin@sysmocom.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#pragma once
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#include <stdint.h>
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#include <inttypes.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/timer.h>
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#include <osmocom/gsm/gsm23003.h>
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#include <osmocom/gprs/gprs_bssgp_rim.h>
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////////////////////
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// NEIGH CACHE
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///////////////////
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/* ARFC+BSIC -> CGI PS cache */
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struct neigh_cache {
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struct llist_head list; /* list of neigh_cache_entry items */
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struct osmo_timer_list cleanup_timer; /* Timer removing too-old entries */
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struct timespec keep_time_intval;
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};
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struct neigh_cache_entry_key {
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uint16_t local_lac;
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uint16_t local_ci;
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uint16_t tgt_arfcn;
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uint8_t tgt_bsic;
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};
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#define NEIGH_CACHE_ENTRY_KEY_FMT "%" PRIu16 "-%" PRIu16 "-%" PRIu16 "-%" PRIu8
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#define NEIGH_CACHE_ENTRY_KEY_ARGS(key) (key)->local_lac, (key)->local_ci, (key)->tgt_arfcn, (key)->tgt_bsic
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static inline bool neigh_cache_entry_key_eq(const struct neigh_cache_entry_key *a,
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const struct neigh_cache_entry_key *b)
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{
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return a->local_lac == b->local_lac &&
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a->local_ci == b->local_ci &&
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a->tgt_arfcn == b->tgt_arfcn &&
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a->tgt_bsic == b->tgt_bsic;
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}
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struct neigh_cache_entry {
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struct llist_head list; /* to be included in neigh_cache->list */
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struct timespec update_ts;
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struct neigh_cache_entry_key key;
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struct osmo_cell_global_id_ps value;
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};
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struct neigh_cache *neigh_cache_alloc(void *ctx, unsigned int keep_time_sec);
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void neigh_cache_set_keep_time_interval(struct neigh_cache *cache, unsigned int keep_time_sec);
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struct neigh_cache_entry *neigh_cache_add(struct neigh_cache *cache,
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const struct neigh_cache_entry_key *key,
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const struct osmo_cell_global_id_ps *value);
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struct neigh_cache_entry *neigh_cache_lookup_entry(struct neigh_cache *cache,
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const struct neigh_cache_entry_key *key);
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const struct osmo_cell_global_id_ps *neigh_cache_lookup_value(struct neigh_cache *cache,
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const struct neigh_cache_entry_key *key);
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void neigh_cache_free(struct neigh_cache *cache);
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////////////////////
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// SI CACHE
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///////////////////
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/* CGI-PS-> SI cache */
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struct si_cache {
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struct llist_head list; /* list of si_cache_entry items */
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struct osmo_timer_list cleanup_timer; /* Timer removing too-old entries */
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struct timespec keep_time_intval;
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};
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struct si_cache_value {
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uint8_t si_buf[BSSGP_RIM_PSI_LEN * 127]; /* 3GPP TS 48.018 11.3.63.2.1 */
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size_t si_len;
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bool type_psi;
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};
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struct si_cache_entry {
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struct llist_head list; /* to be included in si_cache->list */
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struct timespec update_ts;
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struct osmo_cell_global_id_ps key;
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struct si_cache_value value;
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};
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struct si_cache *si_cache_alloc(void *ctx, unsigned int keep_time_sec);
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void si_cache_set_keep_time_interval(struct si_cache *cache, unsigned int keep_time_sec);
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struct si_cache_entry *si_cache_add(struct si_cache *cache,
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const struct osmo_cell_global_id_ps *key,
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const struct si_cache_value *value);
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struct si_cache_entry *si_cache_lookup_entry(struct si_cache *cache,
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const struct osmo_cell_global_id_ps *key);
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const struct si_cache_value *si_cache_lookup_value(struct si_cache *cache,
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const struct osmo_cell_global_id_ps *key);
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void si_cache_free(struct si_cache *cache);
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