Neels Hofmeyr | 7299215 | 2020-09-19 02:36:08 +0200 | [diff] [blame] | 1 | /* GSM subscriber details for use in SMLC */ |
| 2 | /* |
| 3 | * (C) 2020 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| 4 | * |
| 5 | * Author: Neels Hofmeyr <neels@hofmeyr.de> |
| 6 | * |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU Affero General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <osmocom/smlc/debug.h> |
| 25 | #include <osmocom/smlc/smlc_data.h> |
| 26 | #include <osmocom/smlc/smlc_subscr.h> |
| 27 | |
| 28 | static void smlc_subscr_free(struct smlc_subscr *smlc_subscr) |
| 29 | { |
| 30 | llist_del(&smlc_subscr->entry); |
| 31 | talloc_free(smlc_subscr); |
| 32 | } |
| 33 | |
| 34 | static int smlc_subscr_use_cb(struct osmo_use_count_entry *e, int32_t old_use_count, const char *file, int line) |
| 35 | { |
| 36 | struct smlc_subscr *smlc_subscr = e->use_count->talloc_object; |
| 37 | int32_t total; |
| 38 | int level; |
| 39 | |
| 40 | if (!e->use) |
| 41 | return -EINVAL; |
| 42 | |
| 43 | total = osmo_use_count_total(&smlc_subscr->use_count); |
| 44 | |
| 45 | if (total == 0 |
| 46 | || (total == 1 && old_use_count == 0 && e->count == 1)) |
| 47 | level = LOGL_INFO; |
| 48 | else |
| 49 | level = LOGL_DEBUG; |
| 50 | |
| 51 | LOGPSRC(DREF, level, file, line, "%s: %s %s\n", |
| 52 | smlc_subscr_to_str_c(OTC_SELECT, smlc_subscr), |
| 53 | (e->count - old_use_count) > 0? "+" : "-", e->use); |
| 54 | |
| 55 | if (e->count < 0) |
| 56 | return -ERANGE; |
| 57 | |
| 58 | if (total == 0) |
| 59 | smlc_subscr_free(smlc_subscr); |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | static struct smlc_subscr *smlc_subscr_alloc() |
| 64 | { |
| 65 | struct smlc_subscr *smlc_subscr; |
| 66 | |
| 67 | smlc_subscr = talloc_zero(g_smlc, struct smlc_subscr); |
| 68 | if (!smlc_subscr) |
| 69 | return NULL; |
| 70 | |
| 71 | smlc_subscr->use_count = (struct osmo_use_count){ |
| 72 | .talloc_object = smlc_subscr, |
| 73 | .use_cb = smlc_subscr_use_cb, |
| 74 | }; |
| 75 | |
| 76 | llist_add_tail(&smlc_subscr->entry, &g_smlc->subscribers); |
| 77 | |
| 78 | return smlc_subscr; |
| 79 | } |
| 80 | |
| 81 | struct smlc_subscr *smlc_subscr_find(const struct osmo_mobile_identity *imsi, const char *use_token) |
| 82 | { |
| 83 | struct smlc_subscr *smlc_subscr; |
| 84 | if (!imsi) |
| 85 | return NULL; |
| 86 | |
| 87 | llist_for_each_entry(smlc_subscr, &g_smlc->subscribers, entry) { |
| 88 | if (!osmo_mobile_identity_cmp(&smlc_subscr->imsi, imsi)) { |
| 89 | smlc_subscr_get(smlc_subscr, use_token); |
| 90 | return smlc_subscr; |
| 91 | } |
| 92 | } |
| 93 | return NULL; |
| 94 | } |
| 95 | |
| 96 | struct smlc_subscr *smlc_subscr_find_or_create(const struct osmo_mobile_identity *imsi, const char *use_token) |
| 97 | { |
| 98 | struct smlc_subscr *smlc_subscr; |
| 99 | if (!imsi) |
| 100 | return NULL; |
| 101 | smlc_subscr = smlc_subscr_find(imsi, use_token); |
| 102 | if (smlc_subscr) |
| 103 | return smlc_subscr; |
| 104 | smlc_subscr = smlc_subscr_alloc(); |
| 105 | if (!smlc_subscr) |
| 106 | return NULL; |
| 107 | smlc_subscr->imsi = *imsi; |
| 108 | smlc_subscr_get(smlc_subscr, use_token); |
| 109 | return smlc_subscr; |
| 110 | } |
| 111 | |
| 112 | int smlc_subscr_to_str_buf(char *buf, size_t buf_len, const struct smlc_subscr *smlc_subscr) |
| 113 | { |
| 114 | struct osmo_strbuf sb = { .buf = buf, .len = buf_len }; |
| 115 | OSMO_STRBUF_APPEND(sb, osmo_mobile_identity_to_str_buf, &smlc_subscr->imsi); |
| 116 | OSMO_STRBUF_PRINTF(sb, "["); |
| 117 | OSMO_STRBUF_APPEND(sb, osmo_use_count_to_str_buf, &smlc_subscr->use_count); |
| 118 | OSMO_STRBUF_PRINTF(sb, "]"); |
| 119 | return sb.chars_needed; |
| 120 | } |
| 121 | |
| 122 | char *smlc_subscr_to_str_c(void *ctx, const struct smlc_subscr *smlc_subscr) |
| 123 | { |
| 124 | OSMO_NAME_C_IMPL(ctx, 64, "ERROR", smlc_subscr_to_str_buf, smlc_subscr) |
| 125 | } |