| /* 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); |
| } |