122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
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* Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* Author: Oliver Smith
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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 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 <string.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/tdef.h>
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#include <osmocom/core/utils.h>
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#include <gprs_debug.h>
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#include <gprs_pcu.h>
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#include <bts_pch_timer.h>
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#include <gprs_ms.h>
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static struct bts_pch_timer *bts_pch_timer_get_by_ptmsi(struct gprs_rlcmac_bts *bts, uint32_t ptmsi)
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{
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struct bts_pch_timer *p;
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OSMO_ASSERT(ptmsi != GSM_RESERVED_TMSI);
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llist_for_each_entry(p, &bts->pch_timer, entry) {
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if (p->ptmsi != GSM_RESERVED_TMSI && p->ptmsi == ptmsi)
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return p;
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}
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return NULL;
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}
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struct bts_pch_timer *bts_pch_timer_get_by_imsi(struct gprs_rlcmac_bts *bts, const char *imsi)
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{
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struct bts_pch_timer *p;
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llist_for_each_entry(p, &bts->pch_timer, entry) {
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if (strcmp(p->imsi, imsi) == 0)
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return p;
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}
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return NULL;
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}
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static void bts_pch_timer_remove(struct bts_pch_timer *p)
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{
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osmo_timer_del(&p->T3113);
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llist_del(&p->entry);
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LOGP(DPCU, LOGL_DEBUG, "PCH paging timer stopped for IMSI=%s\n", p->imsi);
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talloc_free(p);
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}
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static void T3113_callback(void *data)
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{
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struct bts_pch_timer *p = data;
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LOGP(DPCU, LOGL_INFO, "PCH paging timeout for IMSI=%s\n", p->imsi);
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bts_do_rate_ctr_inc(p->bts, CTR_PCH_REQUESTS_TIMEDOUT);
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bts_pch_timer_remove(p);
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}
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void bts_pch_timer_start(struct gprs_rlcmac_bts *bts, const struct osmo_mobile_identity *mi_paging,
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const char *imsi)
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{
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struct bts_pch_timer *p;
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struct osmo_tdef *tdef;
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p = talloc_zero(bts, struct bts_pch_timer);
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llist_add_tail(&p->entry, &bts->pch_timer);
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p->bts = bts;
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OSMO_STRLCPY_ARRAY(p->imsi, imsi);
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p->ptmsi = (mi_paging->type == GSM_MI_TYPE_TMSI) ? mi_paging->tmsi : GSM_RESERVED_TMSI;
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tdef = osmo_tdef_get_entry(the_pcu->T_defs, 3113);
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OSMO_ASSERT(tdef);
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osmo_timer_setup(&p->T3113, T3113_callback, p);
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osmo_timer_schedule(&p->T3113, tdef->val, 0);
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if (log_check_level(DPCU, LOGL_DEBUG)) {
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char str[64];
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osmo_mobile_identity_to_str_buf(str, sizeof(str), mi_paging);
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LOGP(DPCU, LOGL_DEBUG, "PCH paging timer started for MI=%s IMSI=%s\n", str, p->imsi);
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}
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}
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void bts_pch_timer_stop(struct gprs_rlcmac_bts *bts, const struct GprsMs *ms)
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{
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struct bts_pch_timer *p = NULL;
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uint32_t tlli = ms_tlli(ms);
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const char *imsi = ms_imsi(ms);
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/* First try matching by TMSI if available in MS */
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if (tlli != GSM_RESERVED_TMSI)
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p = bts_pch_timer_get_by_ptmsi(bts, tlli);
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/* Otherwise try matching by IMSI if available in MS */
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if (!p && imsi[0] != '\0')
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p = bts_pch_timer_get_by_imsi(bts, imsi);
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if (p)
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bts_pch_timer_remove(p);
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}
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void bts_pch_timer_stop_all(struct gprs_rlcmac_bts *bts)
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{
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struct bts_pch_timer *p, *n;
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llist_for_each_entry_safe(p, n, &bts->pch_timer, entry) {
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bts_pch_timer_remove(p);
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}
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}
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