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/* A hackish minimal BSC (+MSC +HLR) implementation */
/* (C) 2008-2018 by Harald Welte <laforge@gnumonks.org>
* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <osmocom/bsc/gsm_data.h>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/bsc/abis_rsl.h>
#include <osmocom/bsc/debug.h>
#include <osmocom/bsc/misdn.h>
#include <osmocom/bsc/system_information.h>
#include <osmocom/bsc/paging.h>
#include <osmocom/bsc/signal.h>
#include <osmocom/bsc/chan_alloc.h>
#include <osmocom/core/talloc.h>
#include <osmocom/bsc/ipaccess.h>
#include <osmocom/gsm/sysinfo.h>
#include <osmocom/bsc/pcu_if.h>
#include <osmocom/bsc/bsc_msc_data.h>
#include <osmocom/bsc/handover_cfg.h>
#include <osmocom/bsc/gsm_04_08_rr.h>
#include <osmocom/bsc/neighbor_ident.h>
#include <osmocom/bsc/bts.h>
#include <osmocom/bsc/lb.h>
#include <osmocom/bsc/smscb.h>
#include <osmocom/gsm/protocol/gsm_48_049.h>
#include <time.h>
#include <limits.h>
#include <stdbool.h>
static const struct osmo_stat_item_desc bsc_stat_desc[] = {
{ "num_bts:total", "Number of configured BTS for this BSC", "", 16, 0 },
};
static const struct osmo_stat_item_group_desc bsc_statg_desc = {
.group_name_prefix = "bsc",
.group_description = "base station controller",
.class_id = OSMO_STATS_CLASS_GLOBAL,
.num_items = ARRAY_SIZE(bsc_stat_desc),
.item_desc = bsc_stat_desc,
};
int bsc_shutdown_net(struct gsm_network *net)
{
struct gsm_bts *bts;
llist_for_each_entry(bts, &net->bts_list, list) {
LOGP(DNM, LOGL_NOTICE, "shutting down OML for BTS %u\n", bts->nr);
osmo_signal_dispatch(SS_L_GLOBAL, S_GLOBAL_BTS_CLOSE_OM, bts);
}
return 0;
}
/* XXX hard-coded for now */
#define T3122_CHAN_LOAD_SAMPLE_INTERVAL 1 /* in seconds */
static void update_t3122_chan_load_timer(void *data)
{
struct gsm_network *net = data;
struct gsm_bts *bts;
llist_for_each_entry(bts, &net->bts_list, list)
bts_update_t3122_chan_load(bts);
/* Keep this timer ticking. */
osmo_timer_schedule(&net->t3122_chan_load_timer, T3122_CHAN_LOAD_SAMPLE_INTERVAL, 0);
}
static struct gsm_network *bsc_network_init(void *ctx)
{
struct gsm_network *net = gsm_network_init(ctx);
net->cbc = talloc_zero(net, struct bsc_cbc_link);
if (!net->cbc) {
goto err_out;
}
/* Init back pointer */
net->auto_off_timeout = -1;
INIT_LLIST_HEAD(&net->mscs);
net->ho = ho_cfg_init(net, NULL);
net->hodec2.congestion_check_interval_s = HO_CFG_CONGESTION_CHECK_DEFAULT;
net->neighbor_bss_cells = neighbor_ident_init(net);
/* init statistics */
net->bsc_ctrs = rate_ctr_group_alloc(net, &bsc_ctrg_desc, 0);
if (!net->bsc_ctrs)
goto err_out;
net->bsc_statg = osmo_stat_item_group_alloc(net, &bsc_statg_desc, 0);
if (!net->bsc_statg)
goto err_free_bsc_ctr;
/* init statistics */
net->bts_unknown_ctrs = rate_ctr_group_alloc(net, &bts_ctrg_desc, BTS_STAT_IDX_UNKNOWN);
if (!net->bts_unknown_ctrs)
goto err_free_bsc_ctr_stat;
net->bts_unknown_statg = osmo_stat_item_group_alloc(net, &bts_statg_desc, BTS_STAT_IDX_UNKNOWN);
if (!net->bts_unknown_statg)
goto err_free_all;
INIT_LLIST_HEAD(&net->bts_rejected);
gsm_net_update_ctype(net);
/*
* At present all BTS in the network share one channel load timeout.
* If this becomes a problem for networks with a lot of BTS, this
* code could be refactored to run the timeout individually per BTS.
*/
osmo_timer_setup(&net->t3122_chan_load_timer, update_t3122_chan_load_timer, net);
osmo_timer_schedule(&net->t3122_chan_load_timer, T3122_CHAN_LOAD_SAMPLE_INTERVAL, 0);
net->cbc->net = net;
net->cbc->mode = BSC_CBC_LINK_MODE_DISABLED;
net->cbc->server.local_addr = bsc_cbc_default_server_local_addr;
/* For CBSP client mode: default remote CBSP server port is CBSP_TCP_PORT == 48049. Leave the IP address unset.
* Also leave the local bind for the CBSP client disabled (unconfigured). */
net->cbc->client.remote_addr = (struct osmo_sockaddr_str){ .port = CBSP_TCP_PORT, };
net->cbc->client.local_addr = (struct osmo_sockaddr_str){};
net->smlc.ctrs = rate_ctr_group_alloc(net, &smlc_ctrg_desc, 0);
return net;
err_free_all:
rate_ctr_group_free(net->bts_unknown_ctrs);
err_free_bsc_ctr_stat:
osmo_stat_item_group_free(net->bsc_statg);
err_free_bsc_ctr:
rate_ctr_group_free(net->bsc_ctrs);
err_out:
talloc_free(net);
return NULL;
}
int bsc_network_alloc(void)
{
/* initialize our data structures */
bsc_gsmnet = bsc_network_init(tall_bsc_ctx);
if (!bsc_gsmnet)
return -ENOMEM;
return 0;
}
struct gsm_bts *bsc_bts_alloc_register(struct gsm_network *net, enum gsm_bts_type type, uint8_t bsic)
{
struct gsm_bts *bts = gsm_bts_alloc_register(net, type, bsic);
OSMO_ASSERT(bts != NULL);
bts->ho = ho_cfg_init(bts, net->ho);
return bts;
}
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