132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/* (C) 2017 by sysmocom s.f.m.c. GmbH
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* All Rights Reserved
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*
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* Author: Philipp Maier
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <osmocom/core/signal.h>
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#include <osmocom/bsc/signal.h>
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#include <osmocom/bsc/debug.h>
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#include <osmocom/bsc/bsc_msc_data.h>
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#include <osmocom/bsc/osmo_bsc_sigtran.h>
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#include <osmocom/bsc/bssmap_reset.h>
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#include <osmocom/bsc/bsc_stats.h>
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static void a_reset_tx_reset(void *data)
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{
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struct bsc_msc_data *msc = data;
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osmo_bsc_sigtran_tx_reset(msc);
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}
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static void a_reset_tx_reset_ack(void *data)
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{
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struct bsc_msc_data *msc = data;
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osmo_bsc_sigtran_tx_reset_ack(msc);
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}
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static void a_reset_link_up(void *data)
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{
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struct bsc_msc_data *msc = data;
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LOGP(DMSC, LOGL_NOTICE, "(msc%d) BSSMAP assocation is up\n", msc->nr);
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osmo_stat_item_inc(osmo_stat_item_group_get_item(msc->msc_statg, MSC_STAT_MSC_LINKS_ACTIVE), 1);
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osmo_stat_item_inc(osmo_stat_item_group_get_item(msc->network->bsc_statg, BSC_STAT_NUM_MSC_CONNECTED), 1);
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osmo_signal_dispatch(SS_MSC, S_MSC_CONNECTED, msc);
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}
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static void a_reset_link_lost(void *data)
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{
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struct bsc_msc_data *msc = data;
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LOGP(DMSC, LOGL_NOTICE, "(msc%d) BSSMAP assocation is down\n", msc->nr);
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osmo_stat_item_dec(osmo_stat_item_group_get_item(msc->msc_statg, MSC_STAT_MSC_LINKS_ACTIVE), 1);
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osmo_stat_item_dec(osmo_stat_item_group_get_item(msc->network->bsc_statg, BSC_STAT_NUM_MSC_CONNECTED), 1);
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osmo_signal_dispatch(SS_MSC, S_MSC_LOST, msc);
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osmo_bsc_sigtran_reset(msc);
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}
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/* Create and start state machine which handles the reset/reset-ack procedure */
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void a_reset_alloc(struct bsc_msc_data *msc, const char *name)
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{
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struct bssmap_reset_cfg cfg = {
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.conn_cfm_failure_threshold = 3,
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.ops = {
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.tx_reset = a_reset_tx_reset,
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.tx_reset_ack = a_reset_tx_reset_ack,
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.link_up = a_reset_link_up,
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.link_lost = a_reset_link_lost,
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},
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.data = msc,
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};
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/* There must not be any double allocation! */
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if (msc->a.bssmap_reset) {
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LOGP(DMSC, LOGL_ERROR, "(msc%d) will not allocate a second reset FSM for this MSC\n", msc->nr);
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return;
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}
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msc->a.bssmap_reset = bssmap_reset_alloc(msc, name, &cfg);
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osmo_stat_item_inc(osmo_stat_item_group_get_item(msc->network->bsc_statg, BSC_STAT_NUM_MSC_TOTAL), 1);
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}
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/* Confirm that we successfully received a reset acknowledge message */
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void a_reset_ack_confirm(struct bsc_msc_data *msc)
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{
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if (!msc)
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return;
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if (!msc->a.bssmap_reset)
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return;
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osmo_fsm_inst_dispatch(msc->a.bssmap_reset->fi, BSSMAP_RESET_EV_RX_RESET_ACK, NULL);
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}
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/* Report a failed connection */
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void a_reset_conn_fail(struct bsc_msc_data *msc)
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{
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if (!msc)
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return;
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if (!msc->a.bssmap_reset)
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return;
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osmo_fsm_inst_dispatch(msc->a.bssmap_reset->fi, BSSMAP_RESET_EV_CONN_CFM_FAILURE, NULL);
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}
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/* Report a successful connection */
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void a_reset_conn_success(struct bsc_msc_data *msc)
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{
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if (!msc)
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return;
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if (!msc->a.bssmap_reset)
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return;
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osmo_fsm_inst_dispatch(msc->a.bssmap_reset->fi, BSSMAP_RESET_EV_CONN_CFM_SUCCESS, NULL);
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}
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/* Check if we have a connection to a specified msc */
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bool a_reset_conn_ready(struct bsc_msc_data *msc)
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{
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if (!msc)
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return false;
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if (!msc->a.bssmap_reset)
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return false;
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return bssmap_reset_is_conn_ready(msc->a.bssmap_reset);
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}
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