| /* 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 <osmocom/bsc/bsc_subscriber.h> |
| #include <osmocom/bsc/debug.h> |
| |
| static void bsc_subscr_free(struct bsc_subscr *bsub); |
| |
| static int bsub_use_cb(struct osmo_use_count_entry *e, int32_t old_use_count, const char *file, int line) |
| { |
| struct bsc_subscr *bsub = e->use_count->talloc_object; |
| int32_t total; |
| int level; |
| |
| if (!e->use) |
| return -EINVAL; |
| |
| total = osmo_use_count_total(&bsub->use_count); |
| |
| if (total == 0 |
| || (total == 1 && old_use_count == 0 && e->count == 1)) |
| level = LOGL_INFO; |
| else |
| level = LOGL_DEBUG; |
| |
| LOGPSRC(DREF, level, file, line, "%s: %s %s: now used by %s\n", |
| bsc_subscr_name(bsub), |
| (e->count - old_use_count) > 0? "+" : "-", e->use, |
| osmo_use_count_to_str_c(OTC_SELECT, &bsub->use_count)); |
| |
| if (e->count < 0) |
| return -ERANGE; |
| |
| if (total == 0) |
| bsc_subscr_free(bsub); |
| return 0; |
| } |
| |
| 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; |
| |
| bsub->tmsi = GSM_RESERVED_TMSI; |
| bsub->use_count = (struct osmo_use_count){ |
| .talloc_object = bsub, |
| .use_cb = bsub_use_cb, |
| }; |
| |
| llist_add_tail(&bsub->entry, list); |
| |
| return bsub; |
| } |
| |
| struct bsc_subscr *bsc_subscr_find_by_imsi(struct llist_head *list, |
| const char *imsi, |
| const char *use_token) |
| { |
| struct bsc_subscr *bsub; |
| |
| if (!imsi || !*imsi) |
| return NULL; |
| |
| llist_for_each_entry(bsub, list, entry) { |
| if (!strcmp(bsub->imsi, imsi)) { |
| bsc_subscr_get(bsub, use_token); |
| return bsub; |
| } |
| } |
| return NULL; |
| } |
| |
| struct bsc_subscr *bsc_subscr_find_by_tmsi(struct llist_head *list, |
| uint32_t tmsi, |
| const char *use_token) |
| { |
| struct bsc_subscr *bsub; |
| |
| if (tmsi == GSM_RESERVED_TMSI) |
| return NULL; |
| |
| llist_for_each_entry(bsub, list, entry) { |
| if (bsub->tmsi == tmsi) { |
| bsc_subscr_get(bsub, use_token); |
| return bsub; |
| } |
| } |
| return NULL; |
| } |
| |
| struct bsc_subscr *bsc_subscr_find_by_mi(struct llist_head *list, const struct osmo_mobile_identity *mi, |
| const char *use_token) |
| { |
| if (!mi) |
| return NULL; |
| switch (mi->type) { |
| case GSM_MI_TYPE_IMSI: |
| return bsc_subscr_find_by_imsi(list, mi->imsi, use_token); |
| case GSM_MI_TYPE_TMSI: |
| return bsc_subscr_find_by_tmsi(list, mi->tmsi, use_token); |
| default: |
| 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, |
| const char *use_token) |
| { |
| struct bsc_subscr *bsub; |
| bsub = bsc_subscr_find_by_imsi(list, imsi, use_token); |
| if (bsub) |
| return bsub; |
| bsub = bsc_subscr_alloc(list); |
| if (!bsub) |
| return NULL; |
| bsc_subscr_set_imsi(bsub, imsi); |
| bsc_subscr_get(bsub, use_token); |
| return bsub; |
| } |
| |
| struct bsc_subscr *bsc_subscr_find_or_create_by_tmsi(struct llist_head *list, |
| uint32_t tmsi, |
| const char *use_token) |
| { |
| struct bsc_subscr *bsub; |
| bsub = bsc_subscr_find_by_tmsi(list, tmsi, use_token); |
| if (bsub) |
| return bsub; |
| bsub = bsc_subscr_alloc(list); |
| if (!bsub) |
| return NULL; |
| bsub->tmsi = tmsi; |
| bsc_subscr_get(bsub, use_token); |
| return bsub; |
| } |
| |
| struct bsc_subscr *bsc_subscr_find_or_create_by_mi(struct llist_head *list, const struct osmo_mobile_identity *mi, |
| const char *use_token) |
| { |
| if (!mi) |
| return NULL; |
| switch (mi->type) { |
| case GSM_MI_TYPE_IMSI: |
| return bsc_subscr_find_or_create_by_imsi(list, mi->imsi, use_token); |
| case GSM_MI_TYPE_TMSI: |
| return bsc_subscr_find_or_create_by_tmsi(list, mi->tmsi, use_token); |
| default: |
| return NULL; |
| } |
| } |
| |
| static int bsc_subscr_name_buf(char *buf, size_t buflen, struct bsc_subscr *bsub) |
| { |
| struct osmo_strbuf sb = { .buf = buf, .len = buflen }; |
| OSMO_STRBUF_PRINTF(sb, "subscr"); |
| if (!bsub) { |
| OSMO_STRBUF_PRINTF(sb, "-null"); |
| return sb.chars_needed; |
| } |
| if (bsub->imsi[0]) |
| OSMO_STRBUF_PRINTF(sb, "-IMSI-%s", bsub->imsi); |
| if (bsub->tmsi != GSM_RESERVED_TMSI) |
| OSMO_STRBUF_PRINTF(sb, "-TMSI-0x%08x", bsub->tmsi); |
| return sb.chars_needed; |
| } |
| |
| static char *bsc_subscr_name_c(void *ctx, struct bsc_subscr *bsub) |
| { |
| OSMO_NAME_C_IMPL(ctx, 64, "ERROR", bsc_subscr_name_buf, bsub) |
| } |
| |
| const char *bsc_subscr_name(struct bsc_subscr *bsub) |
| { |
| return bsc_subscr_name_c(OTC_SELECT, bsub); |
| } |
| |
| /* Like bsc_subscr_name() but returns only characters approved by osmo_identifier_valid(), useful for |
| * osmo_fsm_inst IDs. */ |
| const char *bsc_subscr_id(struct bsc_subscr *bsub) |
| { |
| return bsc_subscr_name(bsub); |
| } |
| |
| static void bsc_subscr_free(struct bsc_subscr *bsub) |
| { |
| llist_del(&bsub->entry); |
| talloc_free(bsub); |
| } |
| |
| #define BSUB_USE_LOG_FILTER "log_filter" |
| |
| 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, BSUB_USE_LOG_FILTER); |
| *fsub = NULL; |
| } |
| |
| if (bsc_subscr) { |
| target->filter_map |= (1 << LOG_FLT_BSC_SUBSCR); |
| *fsub = bsc_subscr; |
| bsc_subscr_get(*fsub, BSUB_USE_LOG_FILTER); |
| } else |
| target->filter_map &= ~(1 << LOG_FLT_BSC_SUBSCR); |
| } |