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