diff options
Diffstat (limited to 'src/libbsc/bsc_subscriber.c')
| -rw-r--r-- | src/libbsc/bsc_subscriber.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/libbsc/bsc_subscriber.c b/src/libbsc/bsc_subscriber.c new file mode 100644 index 000000000..73e61e801 --- /dev/null +++ b/src/libbsc/bsc_subscriber.c @@ -0,0 +1,168 @@ +/* GSM subscriber details for use in BSC land */ + +/* + * (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> + * + * Author: Neels Hofmeyr <nhofmeyr@sysmocom.de> + * + * 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 <talloc.h> +#include <string.h> +#include <limits.h> + +#include <osmocom/gsm/gsm48.h> +#include <osmocom/core/logging.h> + +#include <openbsc/bsc_subscriber.h> +#include <openbsc/debug.h> + +static struct bsc_subscr *bsc_subscr_alloc(struct llist_head *list) +{ + struct bsc_subscr *bsub; + + bsub = talloc_zero(list, struct bsc_subscr); + if (!bsub) + return NULL; + + llist_add_tail(&bsub->entry, list); + bsub->use_count = 1; + + return bsub; +} + +struct bsc_subscr *bsc_subscr_find_by_imsi(struct llist_head *list, + const char *imsi) +{ + struct bsc_subscr *bsub; + + if (!imsi || !*imsi) + return NULL; + + llist_for_each_entry(bsub, list, entry) { + if (!strcmp(bsub->imsi, imsi)) + return bsc_subscr_get(bsub); + } + return NULL; +} + +struct bsc_subscr *bsc_subscr_find_by_tmsi(struct llist_head *list, + uint32_t tmsi) +{ + struct bsc_subscr *bsub; + + if (tmsi == GSM_RESERVED_TMSI) + return NULL; + + llist_for_each_entry(bsub, list, entry) { + if (bsub->tmsi == tmsi) + return bsc_subscr_get(bsub); + } + return NULL; +} + +void bsc_subscr_set_imsi(struct bsc_subscr *bsub, const char *imsi) +{ + if (!bsub) + return; + osmo_strlcpy(bsub->imsi, imsi, sizeof(bsub->imsi)); +} + +struct bsc_subscr *bsc_subscr_find_or_create_by_imsi(struct llist_head *list, + const char *imsi) +{ + struct bsc_subscr *bsub; + bsub = bsc_subscr_find_by_imsi(list, imsi); + if (bsub) + return bsub; + bsub = bsc_subscr_alloc(list); + bsc_subscr_set_imsi(bsub, imsi); + return bsub; +} + +struct bsc_subscr *bsc_subscr_find_or_create_by_tmsi(struct llist_head *list, + uint32_t tmsi) +{ + struct bsc_subscr *bsub; + bsub = bsc_subscr_find_by_tmsi(list, tmsi); + if (bsub) + return bsub; + bsub = bsc_subscr_alloc(list); + bsub->tmsi = tmsi; + return bsub; +} + +const char *bsc_subscr_name(struct bsc_subscr *bsub) +{ + static char buf[32]; + if (!bsub) + return "unknown"; + if (bsub->imsi[0]) + snprintf(buf, sizeof(buf), "IMSI:%s", bsub->imsi); + else + snprintf(buf, sizeof(buf), "TMSI:0x%08x", bsub->tmsi); + return buf; +} + +static void bsc_subscr_free(struct bsc_subscr *bsub) +{ + llist_del(&bsub->entry); + talloc_free(bsub); +} + +struct bsc_subscr *_bsc_subscr_get(struct bsc_subscr *bsub, + const char *file, int line) +{ + OSMO_ASSERT(bsub->use_count < INT_MAX); + bsub->use_count++; + LOGPSRC(DREF, LOGL_DEBUG, file, line, + "BSC subscr %s usage increases to: %d\n", + bsc_subscr_name(bsub), bsub->use_count); + return bsub; +} + +struct bsc_subscr *_bsc_subscr_put(struct bsc_subscr *bsub, + const char *file, int line) +{ + bsub->use_count--; + LOGPSRC(DREF, bsub->use_count >= 0? LOGL_DEBUG : LOGL_ERROR, + file, line, + "BSC subscr %s usage decreases to: %d\n", + bsc_subscr_name(bsub), bsub->use_count); + if (bsub->use_count <= 0) + bsc_subscr_free(bsub); + return NULL; +} + +void log_set_filter_bsc_subscr(struct log_target *target, + struct bsc_subscr *bsc_subscr) +{ + struct bsc_subscr **fsub = (void*)&target->filter_data[LOG_FLT_BSC_SUBSCR]; + + /* free the old data */ + if (*fsub) { + bsc_subscr_put(*fsub); + *fsub = NULL; + } + + if (bsc_subscr) { + target->filter_map |= (1 << LOG_FLT_BSC_SUBSCR); + *fsub = bsc_subscr_get(bsc_subscr); + } else + target->filter_map &= ~(1 << LOG_FLT_BSC_SUBSCR); +} |