169 lines
3.9 KiB
C
169 lines
3.9 KiB
C
/* GSM subscriber details for use in BSC land */
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/*
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* (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
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*
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* Author: Neels Hofmeyr <nhofmeyr@sysmocom.de>
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*
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* All Rights Reserved
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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 <talloc.h>
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#include <string.h>
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#include <limits.h>
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#include <osmocom/gsm/gsm48.h>
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#include <osmocom/core/logging.h>
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#include <openbsc/bsc_subscriber.h>
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#include <openbsc/debug.h>
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static struct bsc_subscr *bsc_subscr_alloc(struct llist_head *list)
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{
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struct bsc_subscr *bsub;
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bsub = talloc_zero(list, struct bsc_subscr);
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if (!bsub)
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return NULL;
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llist_add_tail(&bsub->entry, list);
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bsub->use_count = 1;
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return bsub;
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}
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struct bsc_subscr *bsc_subscr_find_by_imsi(struct llist_head *list,
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const char *imsi)
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{
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struct bsc_subscr *bsub;
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if (!imsi || !*imsi)
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return NULL;
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llist_for_each_entry(bsub, list, entry) {
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if (!strcmp(bsub->imsi, imsi))
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return bsc_subscr_get(bsub);
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}
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return NULL;
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}
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struct bsc_subscr *bsc_subscr_find_by_tmsi(struct llist_head *list,
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uint32_t tmsi)
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{
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struct bsc_subscr *bsub;
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if (tmsi == GSM_RESERVED_TMSI)
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return NULL;
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llist_for_each_entry(bsub, list, entry) {
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if (bsub->tmsi == tmsi)
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return bsc_subscr_get(bsub);
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}
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return NULL;
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}
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void bsc_subscr_set_imsi(struct bsc_subscr *bsub, const char *imsi)
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{
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if (!bsub)
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return;
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osmo_strlcpy(bsub->imsi, imsi, sizeof(bsub->imsi));
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}
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struct bsc_subscr *bsc_subscr_find_or_create_by_imsi(struct llist_head *list,
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const char *imsi)
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{
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struct bsc_subscr *bsub;
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bsub = bsc_subscr_find_by_imsi(list, imsi);
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if (bsub)
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return bsub;
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bsub = bsc_subscr_alloc(list);
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bsc_subscr_set_imsi(bsub, imsi);
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return bsub;
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}
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struct bsc_subscr *bsc_subscr_find_or_create_by_tmsi(struct llist_head *list,
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uint32_t tmsi)
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{
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struct bsc_subscr *bsub;
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bsub = bsc_subscr_find_by_tmsi(list, tmsi);
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if (bsub)
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return bsub;
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bsub = bsc_subscr_alloc(list);
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bsub->tmsi = tmsi;
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return bsub;
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}
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const char *bsc_subscr_name(struct bsc_subscr *bsub)
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{
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static char buf[32];
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if (!bsub)
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return "unknown";
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if (bsub->imsi[0])
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snprintf(buf, sizeof(buf), "IMSI:%s", bsub->imsi);
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else
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snprintf(buf, sizeof(buf), "TMSI:0x%08x", bsub->tmsi);
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return buf;
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}
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static void bsc_subscr_free(struct bsc_subscr *bsub)
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{
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llist_del(&bsub->entry);
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talloc_free(bsub);
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}
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struct bsc_subscr *_bsc_subscr_get(struct bsc_subscr *bsub,
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const char *file, int line)
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{
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OSMO_ASSERT(bsub->use_count < INT_MAX);
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bsub->use_count++;
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LOGPSRC(DREF, LOGL_DEBUG, file, line,
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"BSC subscr %s usage increases to: %d\n",
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bsc_subscr_name(bsub), bsub->use_count);
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return bsub;
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}
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struct bsc_subscr *_bsc_subscr_put(struct bsc_subscr *bsub,
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const char *file, int line)
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{
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bsub->use_count--;
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LOGPSRC(DREF, bsub->use_count >= 0? LOGL_DEBUG : LOGL_ERROR,
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file, line,
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"BSC subscr %s usage decreases to: %d\n",
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bsc_subscr_name(bsub), bsub->use_count);
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if (bsub->use_count <= 0)
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bsc_subscr_free(bsub);
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return NULL;
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}
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void log_set_filter_bsc_subscr(struct log_target *target,
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struct bsc_subscr *bsc_subscr)
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{
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struct bsc_subscr **fsub = (void*)&target->filter_data[LOG_FLT_BSC_SUBSCR];
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/* free the old data */
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if (*fsub) {
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bsc_subscr_put(*fsub);
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*fsub = NULL;
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}
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if (bsc_subscr) {
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target->filter_map |= (1 << LOG_FLT_BSC_SUBSCR);
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*fsub = bsc_subscr_get(bsc_subscr);
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} else
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target->filter_map &= ~(1 << LOG_FLT_BSC_SUBSCR);
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}
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