Osmocom Remote SIM Software Suite https://osmocom.org/projects/osmo-remsim
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

201 lines
5.2 KiB

/* (C) 2018-2019 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <pthread.h>
#include <talloc.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/utils.h>
#include "slotmap.h"
#include "debug.h"
const struct value_string slot_map_state_name[] = {
{ SLMAP_S_NEW, "NEW" },
{ SLMAP_S_UNACKNOWLEDGED, "UNACKNOWLEDGED" },
{ SLMAP_S_ACTIVE, "ACTIVE" },
{ SLMAP_S_DELETE_REQ, "DELETE_REQ" },
{ SLMAP_S_DELETING, "DELETING" },
{ 0, NULL }
};
const char *slotmap_name(char *buf, size_t buf_len, const struct slot_mapping *map)
{
snprintf(buf, buf_len, "B(%u:%u) <-> C(%u:%u)",
map->bank.bank_id, map->bank.slot_nr, map->client.client_id, map->client.slot_nr);
return buf;
}
uint32_t slotmap_get_id(const struct slot_mapping *map)
{
return (map->bank.bank_id << 16) | map->bank.slot_nr;
}
/* thread-safe lookup of map by client:slot */
struct slot_mapping *slotmap_by_client(struct slotmaps *maps, const struct client_slot *client)
{
struct slot_mapping *map;
slotmaps_rdlock(maps);
llist_for_each_entry(map, &maps->mappings, list) {
if (client_slot_equals(&map->client, client)) {
slotmaps_unlock(maps);
return map;
}
}
slotmaps_unlock(maps);
return NULL;
}
/* thread-safe lookup of map by bank:slot */
struct slot_mapping *slotmap_by_bank(struct slotmaps *maps, const struct bank_slot *bank)
{
struct slot_mapping *map;
slotmaps_rdlock(maps);
llist_for_each_entry(map, &maps->mappings, list) {
if (bank_slot_equals(&map->bank, bank)) {
slotmaps_unlock(maps);
return map;
}
}
slotmaps_unlock(maps);
return NULL;
}
/* thread-safe creating of a new bank<->client map */
struct slot_mapping *slotmap_add(struct slotmaps *maps, const struct bank_slot *bank,
const struct client_slot *client)
{
struct slot_mapping *map;
char mapname[64];
/* We assume a single thread (main thread) will ever update the mappings,
* and hence we don't have any races by first grabbing + releasing the read
* lock twice before grabbing the writelock below */
map = slotmap_by_bank(maps, bank);
if (map) {
fprintf(stderr, "BANKD %u:%u already in use, cannot add new map\n",
bank->bank_id, bank->slot_nr);
return NULL;
}
map = slotmap_by_client(maps, client);
if (map) {
fprintf(stderr, "CLIENT %u:%u already in use, cannot add new map\n",
client->client_id, client->slot_nr);
return NULL;
}
/* allocate new mapping and add to list of mappings */
map = talloc_zero(maps, struct slot_mapping);
if (!map)
return NULL;
map->maps = maps;
map->bank = *bank;
map->client = *client;
slotmaps_wrlock(maps);
llist_add_tail(&map->list, &maps->mappings);
#ifdef REMSIM_SERVER
map->state = SLMAP_S_NEW;
INIT_LLIST_HEAD(&map->bank_list); /* to ensure llist_del() always succeeds */
#endif
slotmaps_unlock(maps);
printf("Slot Map %s added\n", slotmap_name(mapname, sizeof(mapname), map));
return map;
}
/* thread-safe removal of a bank<->client map */
void _slotmap_del(struct slotmaps *maps, struct slot_mapping *map)
{
char mapname[64];
printf("Slot Map %s deleted\n", slotmap_name(mapname, sizeof(mapname), map));
llist_del(&map->list);
#ifdef REMSIM_SERVER
llist_del(&map->bank_list);
#endif
talloc_free(map);
}
/* thread-safe removal of a bank<->client map */
void slotmap_del(struct slotmaps *maps, struct slot_mapping *map)
{
slotmaps_wrlock(maps);
_slotmap_del(maps, map);
slotmaps_unlock(maps);
}
struct slotmaps *slotmap_init(void *ctx)
{
struct slotmaps *sm = talloc_zero(ctx, struct slotmaps);
INIT_LLIST_HEAD(&sm->mappings);
pthread_rwlock_init(&sm->rwlock, NULL);
return sm;
}
#ifdef REMSIM_SERVER
void _Slotmap_state_change(struct slot_mapping *map, enum slot_mapping_state new_state,
struct llist_head *new_bank_list, const char *file, int line)
{
char mapname[64];
LOGPSRC(DMAIN, LOGL_INFO, file, line, "Slot Map %s state change: %s -> %s\n",
slotmap_name(mapname, sizeof(mapname), map),
get_value_string(slot_map_state_name, map->state),
get_value_string(slot_map_state_name, new_state));
map->state = new_state;
llist_del(&map->bank_list);
if (new_bank_list)
llist_add_tail(&map->bank_list, new_bank_list);
else
INIT_LLIST_HEAD(&map->bank_list);
}
void Slotmap_state_change(struct slot_mapping *map, enum slot_mapping_state new_state,
struct llist_head *new_bank_list, const char *file, int line)
{
slotmaps_wrlock(map->maps);
_Slotmap_state_change(map, new_state, new_bank_list, file, line);
slotmaps_unlock(map->maps);
}
#endif