Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 1 | /* GSM 04.07 Transaction handling */ |
| 2 | |
| 3 | /* (C) 2009 by Harald Welte <laforge@gnumonks.org> |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 7 | * it under the terms of the GNU Affero General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 14 | * GNU Affero General Public License for more details. |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 15 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 16 | * You should have received a copy of the GNU Affero General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 18 | * |
| 19 | */ |
| 20 | |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 21 | #include <osmocom/msc/transaction.h> |
| 22 | #include <osmocom/msc/gsm_data.h> |
| 23 | #include <osmocom/msc/mncc.h> |
| 24 | #include <osmocom/msc/debug.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 25 | #include <osmocom/core/talloc.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 26 | #include <osmocom/msc/gsm_04_08.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 27 | #include <osmocom/msc/vlr.h> |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 28 | #include <osmocom/msc/msc_a.h> |
| 29 | #include <osmocom/msc/msub.h> |
| 30 | #include <osmocom/msc/paging.h> |
| 31 | #include <osmocom/msc/silent_call.h> |
Andreas Eversberg | e24636c | 2023-04-23 12:20:55 +0200 | [diff] [blame] | 32 | #include <osmocom/msc/msc_vgcs.h> |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 33 | |
Harald Welte (local) | d19e58b | 2009-08-15 02:30:58 +0200 | [diff] [blame] | 34 | void *tall_trans_ctx; |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 35 | |
Holger Hans Peter Freyther | 34e9749 | 2009-08-10 07:54:02 +0200 | [diff] [blame] | 36 | void _gsm48_cc_trans_free(struct gsm_trans *trans); |
Vadim Yanitskiy | c350c09 | 2018-11-21 20:51:51 +0700 | [diff] [blame] | 37 | void _gsm411_sms_trans_free(struct gsm_trans *trans); |
Vadim Yanitskiy | f2f83b0 | 2018-06-17 21:09:28 +0700 | [diff] [blame] | 38 | void _gsm911_nc_ss_trans_free(struct gsm_trans *trans); |
Holger Hans Peter Freyther | 34e9749 | 2009-08-10 07:54:02 +0200 | [diff] [blame] | 39 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 40 | struct gsm_trans *trans_find_by_type(const struct msc_a *msc_a, enum trans_type type) |
| 41 | { |
| 42 | struct gsm_trans *trans; |
| 43 | struct gsm_network *net = msc_a_net(msc_a); |
| 44 | struct vlr_subscr *vsub = msc_a_vsub(msc_a); |
| 45 | |
| 46 | llist_for_each_entry(trans, &net->trans_list, entry) { |
| 47 | if (trans->vsub == vsub && trans->type == type) |
| 48 | return trans; |
| 49 | } |
| 50 | return NULL; |
| 51 | } |
| 52 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 53 | /*! Find a transaction in connection for given protocol + transaction ID |
Vadim Yanitskiy | 380b219 | 2018-11-27 15:14:31 +0700 | [diff] [blame] | 54 | * \param[in] conn Connection in which we want to find transaction |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 55 | * \param[in] proto Protocol of transaction |
| 56 | * \param[in] trans_id Transaction ID of transaction |
| 57 | * \returns Matching transaction, if any |
| 58 | */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 59 | struct gsm_trans *trans_find_by_id(const struct msc_a *msc_a, |
| 60 | enum trans_type type, uint8_t trans_id) |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 61 | { |
| 62 | struct gsm_trans *trans; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 63 | struct gsm_network *net = msc_a_net(msc_a); |
| 64 | struct vlr_subscr *vsub = msc_a_vsub(msc_a); |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 65 | |
| 66 | llist_for_each_entry(trans, &net->trans_list, entry) { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 67 | if (trans->vsub == vsub && |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 68 | trans->type == type && |
Harald Welte | b8b4073 | 2009-07-23 21:58:40 +0200 | [diff] [blame] | 69 | trans->transaction_id == trans_id) |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 70 | return trans; |
| 71 | } |
| 72 | return NULL; |
| 73 | } |
| 74 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 75 | /*! Find a transaction by call reference |
| 76 | * \param[in] net Network in which we should search |
Andreas Eversberg | 7e4b032 | 2023-04-23 11:43:13 +0200 | [diff] [blame] | 77 | * \param[in] type Transaction type (e.g. TRANS_CC) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 78 | * \param[in] callref Call Reference of transaction |
| 79 | * \returns Matching transaction, if any |
| 80 | */ |
Andreas Eversberg | 7e4b032 | 2023-04-23 11:43:13 +0200 | [diff] [blame] | 81 | struct gsm_trans *trans_find_by_callref(const struct gsm_network *net, enum trans_type type, |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 82 | uint32_t callref) |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 83 | { |
| 84 | struct gsm_trans *trans; |
| 85 | |
| 86 | llist_for_each_entry(trans, &net->trans_list, entry) { |
Andreas Eversberg | 7e4b032 | 2023-04-23 11:43:13 +0200 | [diff] [blame] | 87 | if (trans->callref == callref && trans->type == type) |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 88 | return trans; |
| 89 | } |
| 90 | return NULL; |
| 91 | } |
| 92 | |
Ivan Kluchnikov | 9bd4fd6 | 2015-12-21 12:05:56 +0300 | [diff] [blame] | 93 | /*! Find a transaction by SM-RP-MR (RP Message Reference) |
Vadim Yanitskiy | 36c44b2 | 2019-01-23 21:22:27 +0700 | [diff] [blame] | 94 | * \param[in] net Network in which we should search |
| 95 | * \param[in] vsub Subscriber for which we should search |
Ivan Kluchnikov | 9bd4fd6 | 2015-12-21 12:05:56 +0300 | [diff] [blame] | 96 | * \param[in] sm_rp_mr RP Message Reference (see GSM TS 04.11, section 8.2.3) |
| 97 | * \returns Matching transaction, NULL otherwise |
| 98 | */ |
Vadim Yanitskiy | 36c44b2 | 2019-01-23 21:22:27 +0700 | [diff] [blame] | 99 | struct gsm_trans *trans_find_by_sm_rp_mr(const struct gsm_network *net, |
| 100 | const struct vlr_subscr *vsub, |
Ivan Kluchnikov | 9bd4fd6 | 2015-12-21 12:05:56 +0300 | [diff] [blame] | 101 | uint8_t sm_rp_mr) |
| 102 | { |
Ivan Kluchnikov | 9bd4fd6 | 2015-12-21 12:05:56 +0300 | [diff] [blame] | 103 | struct gsm_trans *trans; |
| 104 | |
| 105 | llist_for_each_entry(trans, &net->trans_list, entry) { |
| 106 | if (trans->vsub == vsub && |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 107 | trans->type == TRANS_SMS && |
Ivan Kluchnikov | 9bd4fd6 | 2015-12-21 12:05:56 +0300 | [diff] [blame] | 108 | trans->sms.sm_rp_mr == sm_rp_mr) |
| 109 | return trans; |
| 110 | } |
| 111 | |
| 112 | return NULL; |
| 113 | } |
| 114 | |
Keith Whyte | a1a70be | 2021-05-16 02:59:52 +0200 | [diff] [blame] | 115 | struct osmo_lcls *trans_lcls_compose(const struct gsm_trans *trans, bool use_lac) |
| 116 | { |
Vadim Yanitskiy | 583883b | 2021-10-26 10:25:36 +0300 | [diff] [blame] | 117 | if (!trans) { |
| 118 | LOGP(DCC, LOGL_ERROR, "LCLS: unable to fill parameters for unallocated transaction\n"); |
| 119 | return NULL; |
| 120 | } |
| 121 | |
Keith Whyte | a1a70be | 2021-05-16 02:59:52 +0200 | [diff] [blame] | 122 | if (!trans->net->a.sri->sccp) |
| 123 | return NULL; |
| 124 | |
| 125 | struct osmo_ss7_instance *ss7 = osmo_sccp_get_ss7(trans->net->a.sri->sccp); |
| 126 | struct osmo_lcls *lcls; |
| 127 | uint8_t w = osmo_ss7_pc_width(&ss7->cfg.pc_fmt); |
| 128 | |
Keith Whyte | a1a70be | 2021-05-16 02:59:52 +0200 | [diff] [blame] | 129 | if (!trans->net->lcls_permitted) { |
| 130 | LOGP(DCC, LOGL_NOTICE, "LCLS disabled globally\n"); |
| 131 | return NULL; |
| 132 | } |
| 133 | |
| 134 | if (!trans->msc_a) { |
| 135 | LOGP(DCC, LOGL_ERROR, "LCLS: unable to fill parameters for transaction without connection\n"); |
| 136 | return NULL; |
| 137 | } |
| 138 | |
| 139 | if (trans->msc_a->c.ran->type != OSMO_RAT_GERAN_A) { |
| 140 | LOGP(DCC, LOGL_ERROR, "LCLS: only A interface is supported at the moment\n"); |
| 141 | return NULL; |
| 142 | } |
| 143 | |
| 144 | lcls = talloc_zero(trans, struct osmo_lcls); |
| 145 | if (!lcls) { |
| 146 | LOGP(DCC, LOGL_ERROR, "LCLS: failed to allocate osmo_lcls\n"); |
| 147 | return NULL; |
| 148 | } |
| 149 | |
| 150 | LOGP(DCC, LOGL_INFO, "LCLS: using %u bits (%u bytes) for node ID\n", w, w / 8); |
| 151 | |
| 152 | lcls->gcr.net_len = 3; |
| 153 | lcls->gcr.node = ss7->cfg.primary_pc; |
| 154 | |
| 155 | /* net id from Q.1902.3 3-5 bytes, this function gives 3 bytes exactly */ |
Pau Espin Pedrol | 7521a58 | 2023-07-13 11:54:18 +0200 | [diff] [blame] | 156 | osmo_plmn_to_bcd(lcls->gcr.net, &trans->msc_a->via_cell.lai.plmn); |
Keith Whyte | a1a70be | 2021-05-16 02:59:52 +0200 | [diff] [blame] | 157 | |
Keith Whyte | a1a70be | 2021-05-16 02:59:52 +0200 | [diff] [blame] | 158 | |
Keith Whyte | 404fb1b | 2023-01-31 20:09:31 +0100 | [diff] [blame] | 159 | /* TS 29.205 Table B.2.1.9.2 Call Reference ID |
| 160 | * 3 octets Call ID + 2 octets BSS ID |
| 161 | */ |
| 162 | lcls->gcr.cr[2] = (trans->callref >> 0) & 0xff; |
| 163 | lcls->gcr.cr[1] = (trans->callref >> 8) & 0xff; |
| 164 | lcls->gcr.cr[0] = (trans->callref >> 16) & 0xff; |
| 165 | osmo_store16be(use_lac ? trans->msc_a->via_cell.lai.lac : trans->msc_a->via_cell.cell_identity, &lcls->gcr.cr[3]); |
| 166 | |
| 167 | LOGP(DCC, LOGL_INFO, "LCLS: allocated %s-based CR-ID %sfor callref 0x%04x\n", use_lac ? "LAC" : "CI", |
| 168 | osmo_hexdump(lcls->gcr.cr, 5), trans->callref); |
Keith Whyte | a1a70be | 2021-05-16 02:59:52 +0200 | [diff] [blame] | 169 | |
| 170 | lcls->config = GSM0808_LCLS_CFG_BOTH_WAY; |
| 171 | lcls->control = GSM0808_LCLS_CSC_CONNECT; |
| 172 | lcls->corr_needed = true; |
| 173 | lcls->gcr_available = true; |
| 174 | |
| 175 | LOGP(DCC, LOGL_DEBUG, "Filled %s\n", osmo_lcls_dump(lcls)); |
| 176 | LOGP(DCC, LOGL_DEBUG, "Filled %s\n", osmo_gcr_dump(lcls)); |
| 177 | |
| 178 | return lcls; |
| 179 | } |
| 180 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 181 | static const char *trans_vsub_use(enum trans_type type) |
Neels Hofmeyr | 7c5346c | 2019-02-19 02:36:35 +0100 | [diff] [blame] | 182 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 183 | return get_value_string_or_null(trans_type_names, type) ? : "trans-type-unknown"; |
Neels Hofmeyr | 7c5346c | 2019-02-19 02:36:35 +0100 | [diff] [blame] | 184 | } |
| 185 | |
Andreas Eversberg | 712b28e | 2023-06-21 11:17:26 +0200 | [diff] [blame] | 186 | static uint32_t new_call_id = 1; |
| 187 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 188 | /*! Allocate a new transaction and add it to network list |
Oliver Smith | e355d94 | 2023-08-22 15:15:39 +0200 | [diff] [blame] | 189 | * \param[in] net Network in which we allocate transaction |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 190 | * \param[in] subscr Subscriber for which we allocate transaction |
| 191 | * \param[in] protocol Protocol (CC/SMS/...) |
| 192 | * \param[in] callref Call Reference |
| 193 | * \returns Transaction |
| 194 | */ |
Jacob Erlbeck | af792d6 | 2014-12-02 14:22:53 +0100 | [diff] [blame] | 195 | struct gsm_trans *trans_alloc(struct gsm_network *net, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 196 | struct vlr_subscr *vsub, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 197 | enum trans_type type, uint8_t trans_id, |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 198 | uint32_t callref) |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 199 | { |
Vadim Yanitskiy | b683dcf | 2019-05-11 02:17:16 +0700 | [diff] [blame] | 200 | int subsys = trans_log_subsys(type); |
| 201 | struct gsm_trans *trans; |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 202 | |
Andreas Eversberg | 5b1ab54 | 2023-06-05 14:25:59 +0200 | [diff] [blame] | 203 | /* A valid subscriber is indispensable, except for voice group/broadcast calls. */ |
| 204 | if (vsub == NULL && type != TRANS_GCC && type != TRANS_BCC) { |
Vadim Yanitskiy | b683dcf | 2019-05-11 02:17:16 +0700 | [diff] [blame] | 205 | LOGP(subsys, LOGL_ERROR, "unable to alloc transaction, invalid subscriber (NULL)\n"); |
Benoit Bolsee | e7cf5e7 | 2017-07-05 12:34:18 +0200 | [diff] [blame] | 206 | return NULL; |
| 207 | } |
| 208 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 209 | trans = talloc(tall_trans_ctx, struct gsm_trans); |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 210 | if (!trans) |
| 211 | return NULL; |
| 212 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 213 | *trans = (struct gsm_trans){ |
| 214 | .vsub = vsub, |
| 215 | .type = type, |
Vadim Yanitskiy | b683dcf | 2019-05-11 02:17:16 +0700 | [diff] [blame] | 216 | .log_subsys = subsys, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 217 | .transaction_id = trans_id, |
| 218 | .callref = callref, |
Andreas Eversberg | 712b28e | 2023-06-21 11:17:26 +0200 | [diff] [blame] | 219 | .call_id = new_call_id++, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 220 | .net = net, |
Neels Hofmeyr | 85031ee | 2019-08-28 03:42:03 +0200 | [diff] [blame] | 221 | /* empty bearer_cap: make sure the speech_ver array is empty */ |
| 222 | .bearer_cap = { |
| 223 | .speech_ver = { -1 }, |
| 224 | }, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 225 | }; |
Andreas Eversberg | 5b1ab54 | 2023-06-05 14:25:59 +0200 | [diff] [blame] | 226 | if (vsub) |
| 227 | vlr_subscr_get(vsub, trans_vsub_use(type)); |
Jacob Erlbeck | f07c605 | 2014-12-02 11:58:00 +0100 | [diff] [blame] | 228 | llist_add_tail(&trans->entry, &net->trans_list); |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 229 | |
Neels Hofmeyr | ff7074a | 2019-02-28 05:50:06 +0100 | [diff] [blame] | 230 | LOG_TRANS(trans, LOGL_DEBUG, "New transaction\n"); |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 231 | return trans; |
| 232 | } |
| 233 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 234 | /*! Release a transaction |
| 235 | * \param[in] trans Transaction to be released |
| 236 | */ |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 237 | void trans_free(struct gsm_trans *trans) |
| 238 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 239 | const char *usage_token; |
| 240 | struct msc_a *msc_a; |
Neels Hofmeyr | 6166f29 | 2017-11-22 14:33:12 +0100 | [diff] [blame] | 241 | |
Neels Hofmeyr | ff7074a | 2019-02-28 05:50:06 +0100 | [diff] [blame] | 242 | LOG_TRANS(trans, LOGL_DEBUG, "Freeing transaction\n"); |
| 243 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 244 | switch (trans->type) { |
Andreas Eversberg | e24636c | 2023-04-23 12:20:55 +0200 | [diff] [blame] | 245 | case TRANS_GCC: |
| 246 | gsm44068_bcc_gcc_trans_free(trans); |
| 247 | usage_token = MSC_A_USE_GCC; |
| 248 | break; |
| 249 | case TRANS_BCC: |
| 250 | gsm44068_bcc_gcc_trans_free(trans); |
| 251 | usage_token = MSC_A_USE_BCC; |
| 252 | break; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 253 | case TRANS_CC: |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 254 | _gsm48_cc_trans_free(trans); |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 255 | usage_token = MSC_A_USE_CC; |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 256 | break; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 257 | case TRANS_SMS: |
Harald Welte (local) | 86b1717 | 2009-08-14 14:52:17 +0200 | [diff] [blame] | 258 | _gsm411_sms_trans_free(trans); |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 259 | usage_token = MSC_A_USE_SMS; |
Harald Welte (local) | 86b1717 | 2009-08-14 14:52:17 +0200 | [diff] [blame] | 260 | break; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 261 | case TRANS_USSD: |
Vadim Yanitskiy | f2f83b0 | 2018-06-17 21:09:28 +0700 | [diff] [blame] | 262 | _gsm911_nc_ss_trans_free(trans); |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 263 | usage_token = MSC_A_USE_NC_SS; |
| 264 | break; |
| 265 | case TRANS_SILENT_CALL: |
| 266 | trans_silent_call_free(trans); |
| 267 | usage_token = MSC_A_USE_SILENT_CALL; |
Vadim Yanitskiy | 10c6419 | 2018-04-17 19:17:11 +0700 | [diff] [blame] | 268 | break; |
Vadim Yanitskiy | e4574f0 | 2019-01-25 19:23:25 +0700 | [diff] [blame] | 269 | default: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 270 | usage_token = NULL; |
Vadim Yanitskiy | e4574f0 | 2019-01-25 19:23:25 +0700 | [diff] [blame] | 271 | break; |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 272 | } |
| 273 | |
Holger Hans Peter Freyther | d6d7aff | 2015-04-06 12:03:45 +0200 | [diff] [blame] | 274 | if (trans->paging_request) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 275 | paging_request_remove(trans->paging_request); |
Holger Hans Peter Freyther | 49b3ed2 | 2010-12-29 17:09:07 +0100 | [diff] [blame] | 276 | trans->paging_request = NULL; |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 277 | } |
| 278 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 279 | if (trans->vsub) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 280 | vlr_subscr_put(trans->vsub, trans_vsub_use(trans->type)); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 281 | trans->vsub = NULL; |
Holger Hans Peter Freyther | 405824c | 2012-12-22 18:16:47 +0100 | [diff] [blame] | 282 | } |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 283 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 284 | msc_a = trans->msc_a; |
| 285 | trans->msc_a = NULL; |
| 286 | |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 287 | llist_del(&trans->entry); |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 288 | talloc_free(trans); |
Neels Hofmeyr | d6a769b | 2018-03-12 23:59:07 +0100 | [diff] [blame] | 289 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 290 | if (msc_a && usage_token) |
| 291 | msc_a_put(msc_a, usage_token); |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 292 | } |
| 293 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 294 | /*! allocate an unused transaction ID for the given subscriber |
Max | 30fb97a | 2019-01-10 17:25:33 +0100 | [diff] [blame] | 295 | * in the given protocol using TI flag = 0 (allocated by us). |
| 296 | * See GSM 04.07, section 11.2.3.1.3 "Transaction identifier". |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 297 | * \param[in] net GSM network |
Vadim Yanitskiy | baeeb90 | 2019-02-14 16:41:30 +0700 | [diff] [blame] | 298 | * \param[in] subscr Subscriber for which to assign a new TID |
| 299 | * \param[in] protocol Protocol of to be assigned TID |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 300 | */ |
Max | 7916ca1 | 2019-01-02 11:48:14 +0100 | [diff] [blame] | 301 | int trans_assign_trans_id(const struct gsm_network *net, const struct vlr_subscr *vsub, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 302 | enum trans_type type) |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 303 | { |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 304 | struct gsm_trans *trans; |
| 305 | unsigned int used_tid_bitmask = 0; |
Sylvain Munaut | 926fcec | 2009-12-24 13:26:17 +0100 | [diff] [blame] | 306 | int i, j, h; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 307 | uint8_t proto = trans_type_to_gsm48_proto(type); |
Harald Welte | 78283ef | 2009-07-23 21:36:44 +0200 | [diff] [blame] | 308 | |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 309 | /* generate bitmask of already-used TIDs for this (subscr,proto) */ |
| 310 | llist_for_each_entry(trans, &net->trans_list, entry) { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 311 | if (trans->vsub != vsub || |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 312 | proto != trans_type_to_gsm48_proto(trans->type) || |
Max | d8daaae | 2019-02-14 16:54:10 +0700 | [diff] [blame] | 313 | trans->transaction_id == TRANS_ID_UNASSIGNED) |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 314 | continue; |
| 315 | used_tid_bitmask |= (1 << trans->transaction_id); |
| 316 | } |
| 317 | |
Sylvain Munaut | 926fcec | 2009-12-24 13:26:17 +0100 | [diff] [blame] | 318 | /* find a new one, trying to go in a 'circular' pattern */ |
| 319 | for (h = 6; h > 0; h--) |
Max | 30fb97a | 2019-01-10 17:25:33 +0100 | [diff] [blame] | 320 | if (used_tid_bitmask & (1 << h)) |
Sylvain Munaut | 926fcec | 2009-12-24 13:26:17 +0100 | [diff] [blame] | 321 | break; |
Sylvain Munaut | b9f3dce | 2009-12-18 18:28:11 +0100 | [diff] [blame] | 322 | for (i = 0; i < 7; i++) { |
Max | 30fb97a | 2019-01-10 17:25:33 +0100 | [diff] [blame] | 323 | j = (h + i) % 7; |
Sylvain Munaut | 926fcec | 2009-12-24 13:26:17 +0100 | [diff] [blame] | 324 | if ((used_tid_bitmask & (1 << j)) == 0) |
| 325 | return j; |
Harald Welte | 78283ef | 2009-07-23 21:36:44 +0200 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | return -1; |
Harald Welte | 9ee4825 | 2009-07-23 21:25:08 +0200 | [diff] [blame] | 329 | } |
Holger Hans Peter Freyther | 70ae5d3 | 2012-11-23 21:33:15 +0100 | [diff] [blame] | 330 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 331 | /*! Check if we have any transaction for given connection |
| 332 | * \param[in] conn Connection to check |
Max | c065ca3 | 2019-01-14 11:51:28 +0100 | [diff] [blame] | 333 | * \returns transaction pointer if found, NULL otherwise |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 334 | */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 335 | struct gsm_trans *trans_has_conn(const struct msc_a *msc_a) |
Holger Hans Peter Freyther | 70ae5d3 | 2012-11-23 21:33:15 +0100 | [diff] [blame] | 336 | { |
| 337 | struct gsm_trans *trans; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 338 | struct gsm_network *net = msc_a_net(msc_a); |
Holger Hans Peter Freyther | 70ae5d3 | 2012-11-23 21:33:15 +0100 | [diff] [blame] | 339 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 340 | llist_for_each_entry(trans, &net->trans_list, entry) |
| 341 | if (trans->msc_a == msc_a) |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 342 | return trans; |
Holger Hans Peter Freyther | 70ae5d3 | 2012-11-23 21:33:15 +0100 | [diff] [blame] | 343 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 344 | return NULL; |
Holger Hans Peter Freyther | 70ae5d3 | 2012-11-23 21:33:15 +0100 | [diff] [blame] | 345 | } |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 346 | |
| 347 | /*! Free all transactions associated with a connection, presumably when the |
| 348 | * conn is being closed. The transaction code will inform the CC or SMS |
| 349 | * facilities, which will then send the necessary release indications. |
| 350 | * \param[in] conn Connection that is going to be closed. |
| 351 | */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 352 | void trans_conn_closed(const struct msc_a *msc_a) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 353 | { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 354 | /* As part of the CC REL_IND the remote leg might be released and this |
| 355 | * will trigger another call to trans_free. This is something the llist |
| 356 | * macro can not handle and we need to re-iterate the list every time. |
| 357 | */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 358 | struct gsm_trans *trans; |
| 359 | while ((trans = trans_has_conn(msc_a))) |
| 360 | trans_free(trans); |
| 361 | } |
| 362 | |
| 363 | const struct value_string trans_type_names[] = { |
Andreas Eversberg | 456c6f7 | 2023-04-23 11:54:16 +0200 | [diff] [blame] | 364 | { TRANS_GCC, "GCC" }, |
| 365 | { TRANS_BCC, "BCC" }, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 366 | { TRANS_CC, "CC" }, |
| 367 | { TRANS_SMS, "SMS" }, |
| 368 | { TRANS_USSD, "NCSS" }, |
| 369 | { TRANS_SILENT_CALL, "silent-call" }, |
| 370 | {} |
| 371 | }; |
| 372 | |
| 373 | uint8_t trans_type_to_gsm48_proto(enum trans_type type) |
| 374 | { |
| 375 | switch (type) { |
Andreas Eversberg | 456c6f7 | 2023-04-23 11:54:16 +0200 | [diff] [blame] | 376 | case TRANS_GCC: |
| 377 | return GSM48_PDISC_GROUP_CC; |
| 378 | case TRANS_BCC: |
| 379 | return GSM48_PDISC_BCAST_CC; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 380 | case TRANS_CC: |
| 381 | case TRANS_SILENT_CALL: |
| 382 | return GSM48_PDISC_CC; |
| 383 | case TRANS_SMS: |
| 384 | return GSM48_PDISC_SMS; |
| 385 | case TRANS_USSD: |
| 386 | return GSM48_PDISC_NC_SS; |
| 387 | default: |
| 388 | return GSM48_PDISC_TEST; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 389 | } |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 390 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 391 | } |
Neels Hofmeyr | f636e6c | 2019-10-07 21:20:43 +0200 | [diff] [blame] | 392 | |
| 393 | const char *trans_name(const struct gsm_trans *trans) |
| 394 | { |
| 395 | static char namebuf[32]; |
| 396 | if (!trans) |
| 397 | return "NULL"; |
| 398 | switch (trans->type) { |
| 399 | case TRANS_CC: |
| 400 | snprintf(namebuf, sizeof(namebuf), "%s:%s", |
| 401 | trans_type_name(trans->type), gsm48_cc_state_name(trans->cc.state)); |
| 402 | return namebuf; |
| 403 | |
Andreas Eversberg | e24636c | 2023-04-23 12:20:55 +0200 | [diff] [blame] | 404 | case TRANS_GCC: |
| 405 | case TRANS_BCC: |
| 406 | snprintf(namebuf, sizeof(namebuf), "%s:%s", |
| 407 | trans_type_name(trans->type), gsm44068_group_id_string(trans->callref)); |
| 408 | return namebuf; |
| 409 | |
Neels Hofmeyr | f636e6c | 2019-10-07 21:20:43 +0200 | [diff] [blame] | 410 | default: |
| 411 | return trans_type_name(trans->type); |
| 412 | } |
| 413 | } |