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/*
* Copyright (c) 2021 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.
*/
/**
* \file listener_table.c
* \brief Implementation of hICN listener table
*/
#include <hicn/util/log.h>
#include <hicn/util/sstrncpy.h>
#include "listener_table.h"
#include "listener.h"
/* This is only used as a hint for first allocation, as the table is resizeable
*/
#define DEFAULT_LISTENER_TABLE_SIZE 64
typedef struct {
char name[SYMBOLIC_NAME_LEN];
} name_key_t;
listener_table_t *_listener_table_create(size_t init_size, size_t max_size) {
if (init_size == 0) init_size = DEFAULT_LISTENER_TABLE_SIZE;
listener_table_t *table = malloc(sizeof(listener_table_t));
if (!table) return NULL;
table->max_size = max_size;
/* Initialize indices */
table->id_by_name = kh_init_lt_name();
table->name_keys = slab_create(name_key_t, SLAB_INIT_SIZE);
table->id_by_key = kh_init_lt_key();
table->listener_keys = slab_create(listener_key_t, SLAB_INIT_SIZE);
/*
* We start by allocating a reasonably-sized pool, as this will eventually
* be resized if needed.
*/
pool_init(table->listeners, init_size, 0);
return table;
}
void listener_table_free(listener_table_t *table) {
unsigned listener_id;
kh_foreach_value(table->id_by_key, listener_id, {
listener_t *listener = listener_table_get_by_id(table, listener_id);
const char *name = listener_get_name(listener);
INFO("Removing listener %s [%d]", name, listener->fd);
listener_finalize(listener);
});
kh_destroy_lt_name(table->id_by_name);
slab_free(table->name_keys);
kh_destroy_lt_key(table->id_by_key);
slab_free(table->listener_keys);
pool_free(table->listeners);
free(table);
}
listener_t *listener_table_allocate(const listener_table_t *table,
const listener_key_t *key,
const char *name) {
listener_t *listener = NULL;
pool_get(table->listeners, listener);
if (!listener) return NULL;
off_t id = listener - table->listeners;
int rc;
// Add in name hash table
name_key_t *name_copy = slab_get(name_key_t, table->name_keys);
strcpy_s(name_copy->name, sizeof(name_key_t), name);
khiter_t k = kh_put_lt_name(table->id_by_name, name_copy->name, &rc);
assert(rc == KH_ADDED || rc == KH_RESET);
kh_value(table->id_by_name, k) = (unsigned int)id;
// Add in key hash table
listener_key_t *key_copy = slab_get(listener_key_t, table->listener_keys);
memcpy(key_copy, key, sizeof(listener_key_t));
k = kh_put_lt_key(table->id_by_key, key_copy, &rc);
assert(rc == KH_ADDED || rc == KH_RESET);
kh_value(table->id_by_key, k) = (unsigned int)id;
assert(kh_size(table->id_by_name) == kh_size(table->id_by_key));
return listener;
}
void listener_table_deallocate(const listener_table_t *table,
listener_t *listener) {
const char *name = listener_get_name(listener);
listener_key_t *key = listener_get_key(listener);
// Remove from name hash table
khiter_t k = kh_get_lt_name(table->id_by_name, name);
assert(k != kh_end(table->id_by_name));
kh_del_lt_name(table->id_by_name, k);
slab_put(table->name_keys, kh_key(table->id_by_name, k));
// Remove from key hash table
k = kh_get_lt_key(table->id_by_key, key);
assert(k != kh_end(table->id_by_key));
kh_del_lt_key(table->id_by_key, k);
slab_put(table->listener_keys, kh_key(table->id_by_key, k));
assert(kh_size(table->id_by_name) == kh_size(table->id_by_key));
pool_put(table->listeners, listener);
}
listener_t *listener_table_get_by_address(listener_table_t *table,
face_type_t type,
const address_t *address) {
listener_key_t key = listener_key_factory(*address, type);
khiter_t k = kh_get_lt_key(table->id_by_key, &key);
if (k == kh_end(table->id_by_key)) return NULL;
return listener_table_at(table, kh_val(table->id_by_key, k));
}
listener_t *listener_table_get_by_key(listener_table_t *table,
const listener_key_t *key) {
khiter_t k = kh_get_lt_key(table->id_by_key, key);
if (k == kh_end(table->id_by_key)) return NULL;
return listener_table_at(table, kh_val(table->id_by_key, k));
}
void listener_table_remove_by_id(listener_table_t *table, off_t id) {
listener_t *listener = listener_table_at(table, id);
INFO("Removing listener %d (%s)", id, listener_get_name(listener));
listener_table_deallocate(table, listener);
}
off_t listener_table_get_id_by_name(const listener_table_t *table,
const char *name) {
khiter_t k = kh_get_lt_name(table->id_by_name, name);
if (k == kh_end(table->id_by_name)) return LISTENER_ID_UNDEFINED;
return kh_val(table->id_by_name, k);
}
listener_t *listener_table_get_by_name(listener_table_t *table,
const char *name) {
unsigned listener_id =
(unsigned int)listener_table_get_id_by_name(table, name);
if (!listener_id_is_valid(listener_id)) return NULL;
return listener_table_at(table, listener_id);
}
listener_t *_listener_table_get_by_id(listener_table_t *table, off_t id) {
return listener_table_get_by_id(table, id);
}
void listener_table_print_by_key(const listener_table_t *table) {
const listener_key_t *k;
unsigned v;
char addr_str[NI_MAXHOST];
int port;
listener_t *listener;
const char *name;
INFO("*** Listener table ***");
kh_foreach(table->id_by_key, k, v, {
address_to_string(&k->address, addr_str, &port);
listener = listener_table_get_by_id(table, v);
name = listener_get_name(listener);
INFO("%s:%d - %s\t\t\t\t(%u, %s)", addr_str, port, face_type_str(k->type),
v, name);
})
}
void listener_table_print_by_name(const listener_table_t *table) {
const char *k;
unsigned v;
char addr_str[NI_MAXHOST];
int port;
listener_t *listener;
const listener_key_t *key;
INFO("*** Listener table ***");
kh_foreach(table->id_by_name, k, v, {
listener = listener_table_get_by_id(table, v);
key = listener_get_key(listener);
address_to_string(&key->address, addr_str, &port);
INFO("%s:%d - %s\t\t\t\t(%u, %s)", addr_str, port, face_type_str(key->type),
v, k);
})
}
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