Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 1 | /* main MSC management code... */ |
| 2 | |
| 3 | /* |
Holger Hans Peter Freyther | e7bd863 | 2013-06-30 15:30:47 +0200 | [diff] [blame] | 4 | * (C) 2010,2013 by Holger Hans Peter Freyther <zecke@selfish.org> |
Holger Hans Peter Freyther | 85531cc | 2010-10-06 20:37:09 +0800 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 6 | * |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 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 |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 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 |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 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/>. |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 24 | #include <osmocom/msc/debug.h> |
| 25 | #include <osmocom/msc/transaction.h> |
| 26 | #include <osmocom/msc/db.h> |
| 27 | #include <osmocom/msc/vlr.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 28 | #include <osmocom/msc/a_iface.h> |
Max | 43b01b0 | 2017-09-15 11:22:30 +0200 | [diff] [blame] | 29 | #include <osmocom/msc/gsm_04_08.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 30 | #include <osmocom/msc/gsm_04_11.h> |
Neels Hofmeyr | f383d41 | 2018-12-19 17:05:13 +0100 | [diff] [blame] | 31 | #include <osmocom/msc/msc_mgcp.h> |
Holger Hans Peter Freyther | 6a3d765 | 2010-06-15 12:03:10 +0800 | [diff] [blame] | 32 | |
Neels Hofmeyr | 00e82d6 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 33 | #include "../../bscconfig.h" |
| 34 | #ifdef BUILD_IU |
| 35 | #include <osmocom/ranap/iu_client.h> |
| 36 | #else |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 37 | #include <osmocom/msc/iu_dummy.h> |
Neels Hofmeyr | 00e82d6 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 38 | #endif |
| 39 | |
Neels Hofmeyr | 55014d0 | 2018-03-22 16:43:40 +0100 | [diff] [blame] | 40 | struct gsm_network *gsm_network_init(void *ctx, mncc_recv_cb_t mncc_recv) |
| 41 | { |
| 42 | struct gsm_network *net; |
| 43 | |
| 44 | net = talloc_zero(ctx, struct gsm_network); |
| 45 | if (!net) |
| 46 | return NULL; |
| 47 | |
| 48 | net->plmn = (struct osmo_plmn_id){ .mcc=1, .mnc=1 }; |
| 49 | |
| 50 | /* Permit a compile-time default of A5/3 and A5/1 */ |
| 51 | net->a5_encryption_mask = (1 << 3) | (1 << 1); |
| 52 | |
| 53 | /* Use 30 min periodic update interval as sane default */ |
| 54 | net->t3212 = 5; |
| 55 | |
Philipp Maier | 9ca7b31 | 2018-10-10 17:00:49 +0200 | [diff] [blame] | 56 | net->mncc_guard_timeout = 180; |
Vadim Yanitskiy | 64623e1 | 2018-11-28 23:05:51 +0700 | [diff] [blame] | 57 | net->ncss_guard_timeout = 30; |
Philipp Maier | 9ca7b31 | 2018-10-10 17:00:49 +0200 | [diff] [blame] | 58 | |
Neels Hofmeyr | 55014d0 | 2018-03-22 16:43:40 +0100 | [diff] [blame] | 59 | net->paging_response_timer = MSC_PAGING_RESPONSE_TIMER_DEFAULT; |
| 60 | |
| 61 | INIT_LLIST_HEAD(&net->trans_list); |
| 62 | INIT_LLIST_HEAD(&net->upqueue); |
Neels Hofmeyr | c036b79 | 2018-11-29 22:37:51 +0100 | [diff] [blame] | 63 | INIT_LLIST_HEAD(&net->ran_conns); |
Neels Hofmeyr | 55014d0 | 2018-03-22 16:43:40 +0100 | [diff] [blame] | 64 | |
| 65 | /* init statistics */ |
| 66 | net->msc_ctrs = rate_ctr_group_alloc(net, &msc_ctrg_desc, 0); |
| 67 | if (!net->msc_ctrs) { |
| 68 | talloc_free(net); |
| 69 | return NULL; |
| 70 | } |
| 71 | net->active_calls = osmo_counter_alloc("msc.active_calls"); |
Vadim Yanitskiy | ad64e2a | 2018-06-26 18:27:25 +0700 | [diff] [blame] | 72 | net->active_nc_ss = osmo_counter_alloc("msc.active_nc_ss"); |
Neels Hofmeyr | 55014d0 | 2018-03-22 16:43:40 +0100 | [diff] [blame] | 73 | |
| 74 | net->mncc_recv = mncc_recv; |
| 75 | |
| 76 | INIT_LLIST_HEAD(&net->a.bscs); |
| 77 | |
| 78 | return net; |
| 79 | } |
| 80 | |
Neels Hofmeyr | 80447eb | 2018-12-05 01:11:28 +0100 | [diff] [blame] | 81 | void gsm_network_set_mncc_sock_path(struct gsm_network *net, const char *mncc_sock_path) |
| 82 | { |
| 83 | if (net->mncc_sock_path) |
| 84 | talloc_free(net->mncc_sock_path); |
| 85 | net->mncc_sock_path = mncc_sock_path ? talloc_strdup(net, mncc_sock_path) : NULL; |
| 86 | } |
| 87 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 88 | /* Receive a SAPI-N-REJECT from BSC */ |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 89 | void ran_conn_sapi_n_reject(struct ran_conn *conn, int dlci) |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 90 | { |
Holger Hans Peter Freyther | 6a3d765 | 2010-06-15 12:03:10 +0800 | [diff] [blame] | 91 | int sapi = dlci & 0x7; |
| 92 | |
| 93 | if (sapi == UM_SAPI_SMS) |
| 94 | gsm411_sapi_n_reject(conn); |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 95 | } |
| 96 | |
Neels Hofmeyr | d03e728 | 2018-11-30 01:20:32 +0100 | [diff] [blame] | 97 | /* receive a Level 3 Complete message. |
| 98 | * Ownership of the conn is completely passed to the conn FSM, i.e. for both acceptance and rejection, |
| 99 | * the conn FSM shall decide when to release this conn. It may already be discarded before this exits. */ |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 100 | void ran_conn_compl_l3(struct ran_conn *conn, |
| 101 | struct msgb *msg, uint16_t chosen_channel) |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 102 | { |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 103 | ran_conn_get(conn, RAN_CONN_USE_COMPL_L3); |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 104 | gsm0408_dispatch(conn, msg); |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 105 | ran_conn_put(conn, RAN_CONN_USE_COMPL_L3); |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 106 | } |
| 107 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 108 | /* Receive a DTAP message from BSC */ |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 109 | void ran_conn_dtap(struct ran_conn *conn, struct msgb *msg) |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 110 | { |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 111 | ran_conn_get(conn, RAN_CONN_USE_DTAP); |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 112 | gsm0408_dispatch(conn, msg); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 113 | |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 114 | ran_conn_put(conn, RAN_CONN_USE_DTAP); |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 115 | } |
| 116 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 117 | /* Receive an ASSIGNMENT COMPLETE from BSC */ |
Neels Hofmeyr | 85cb253 | 2018-12-11 18:59:27 +0100 | [diff] [blame] | 118 | void msc_assign_compl(struct ran_conn *conn, |
| 119 | uint8_t rr_cause, uint8_t chosen_channel, |
| 120 | uint8_t encr_alg_id, uint8_t speec) |
Holger Hans Peter Freyther | 40aac3f | 2011-12-27 12:31:02 +0100 | [diff] [blame] | 121 | { |
Neels Hofmeyr | 85cb253 | 2018-12-11 18:59:27 +0100 | [diff] [blame] | 122 | LOGP(DRR, LOGL_DEBUG, "MSC assign complete (do nothing).\n"); |
Holger Hans Peter Freyther | 40aac3f | 2011-12-27 12:31:02 +0100 | [diff] [blame] | 123 | } |
| 124 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 125 | /* Receive an ASSIGNMENT FAILURE from BSC */ |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 126 | void ran_conn_assign_fail(struct ran_conn *conn, uint8_t cause, uint8_t *rr_cause) |
Holger Hans Peter Freyther | 40aac3f | 2011-12-27 12:31:02 +0100 | [diff] [blame] | 127 | { |
Neels Hofmeyr | f383d41 | 2018-12-19 17:05:13 +0100 | [diff] [blame] | 128 | LOGPFSMSL(conn->fi, DRR, LOGL_ERROR, "Assignment Failure: cause=%u rr_cause=%u.\n", |
| 129 | cause, rr_cause ? *rr_cause : 0); |
| 130 | msc_mgcp_ass_fail(conn); |
Holger Hans Peter Freyther | 40aac3f | 2011-12-27 12:31:02 +0100 | [diff] [blame] | 131 | } |
| 132 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 133 | /* Receive a CLASSMARK CHANGE from BSC */ |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 134 | void ran_conn_classmark_chg(struct ran_conn *conn, |
| 135 | const uint8_t *cm2, uint8_t cm2_len, |
| 136 | const uint8_t *cm3, uint8_t cm3_len) |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 137 | { |
Neels Hofmeyr | 68cf957 | 2018-09-18 15:52:58 +0200 | [diff] [blame] | 138 | struct gsm_classmark *cm; |
| 139 | |
| 140 | if (!conn->vsub) |
| 141 | cm = &conn->temporary_classmark; |
| 142 | else |
| 143 | cm = &conn->vsub->classmark; |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 144 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 145 | if (cm2 && cm2_len) { |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 146 | if (cm2_len > sizeof(cm->classmark2)) { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 147 | LOGP(DRR, LOGL_NOTICE, "%s: classmark2 is %u bytes, truncating at %zu bytes\n", |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 148 | vlr_subscr_name(conn->vsub), cm2_len, sizeof(cm->classmark2)); |
| 149 | cm2_len = sizeof(cm->classmark2); |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 150 | } |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 151 | cm->classmark2_len = cm2_len; |
| 152 | memcpy(cm->classmark2, cm2, cm2_len); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 153 | } |
| 154 | if (cm3 && cm3_len) { |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 155 | if (cm3_len > sizeof(cm->classmark3)) { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 156 | LOGP(DRR, LOGL_NOTICE, "%s: classmark3 is %u bytes, truncating at %zu bytes\n", |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 157 | vlr_subscr_name(conn->vsub), cm3_len, sizeof(cm->classmark3)); |
| 158 | cm3_len = sizeof(cm->classmark3); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 159 | } |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 160 | cm->classmark3_len = cm3_len; |
| 161 | memcpy(cm->classmark3, cm3, cm3_len); |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 162 | } |
Neels Hofmeyr | 3117b70 | 2018-09-13 03:23:07 +0200 | [diff] [blame] | 163 | |
| 164 | /* bump subscr conn FSM in case it is waiting for a Classmark Update */ |
Neels Hofmeyr | c036b79 | 2018-11-29 22:37:51 +0100 | [diff] [blame] | 165 | if (conn->fi->state == RAN_CONN_S_WAIT_CLASSMARK_UPDATE) |
| 166 | osmo_fsm_inst_dispatch(conn->fi, RAN_CONN_E_CLASSMARK_UPDATE, NULL); |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 167 | } |
| 168 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 169 | /* Receive a CIPHERING MODE COMPLETE from BSC */ |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 170 | void ran_conn_cipher_mode_compl(struct ran_conn *conn, struct msgb *msg, uint8_t alg_id) |
Harald Welte | cf149ee | 2012-01-23 16:40:24 +0100 | [diff] [blame] | 171 | { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 172 | struct vlr_ciph_result ciph_res = { .cause = VLR_CIPH_REJECT }; |
Harald Welte | cf149ee | 2012-01-23 16:40:24 +0100 | [diff] [blame] | 173 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 174 | if (!conn) { |
Harald Welte | 284c39a | 2018-01-24 22:38:06 +0100 | [diff] [blame] | 175 | LOGP(DRR, LOGL_ERROR, "invalid: rx Ciphering Mode Complete on NULL conn\n"); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 176 | return; |
| 177 | } |
| 178 | if (!conn->vsub) { |
Harald Welte | 284c39a | 2018-01-24 22:38:06 +0100 | [diff] [blame] | 179 | LOGP(DRR, LOGL_ERROR, "invalid: rx Ciphering Mode Complete for NULL subscr\n"); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 180 | return; |
Harald Welte | cf149ee | 2012-01-23 16:40:24 +0100 | [diff] [blame] | 181 | } |
| 182 | |
Harald Welte | 284c39a | 2018-01-24 22:38:06 +0100 | [diff] [blame] | 183 | DEBUGP(DRR, "%s: CIPHERING MODE COMPLETE\n", vlr_subscr_name(conn->vsub)); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 184 | |
Harald Welte | 284c39a | 2018-01-24 22:38:06 +0100 | [diff] [blame] | 185 | if (msg) { |
| 186 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 187 | unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| 188 | struct tlv_parsed tp; |
| 189 | uint8_t mi_type; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 190 | |
Harald Welte | 284c39a | 2018-01-24 22:38:06 +0100 | [diff] [blame] | 191 | if (!gh) { |
| 192 | LOGP(DRR, LOGL_ERROR, "invalid: msgb without l3 header\n"); |
| 193 | return; |
| 194 | } |
| 195 | |
| 196 | tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0); |
| 197 | |
| 198 | /* bearer capability */ |
| 199 | if (TLVP_PRESENT(&tp, GSM48_IE_MOBILE_ID)) { |
| 200 | mi_type = TLVP_VAL(&tp, GSM48_IE_MOBILE_ID)[0] & GSM_MI_TYPE_MASK; |
| 201 | if (mi_type == GSM_MI_TYPE_IMEISV |
| 202 | && TLVP_LEN(&tp, GSM48_IE_MOBILE_ID) > 0) { |
Neels Hofmeyr | fa10eda | 2018-03-13 01:22:01 +0100 | [diff] [blame] | 203 | gsm48_mi_to_string(ciph_res.imeisv, sizeof(ciph_res.imeisv), |
Harald Welte | 284c39a | 2018-01-24 22:38:06 +0100 | [diff] [blame] | 204 | TLVP_VAL(&tp, GSM48_IE_MOBILE_ID), |
| 205 | TLVP_LEN(&tp, GSM48_IE_MOBILE_ID)); |
Harald Welte | 284c39a | 2018-01-24 22:38:06 +0100 | [diff] [blame] | 206 | } |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 207 | } |
| 208 | } |
| 209 | |
Neels Hofmeyr | f41658d | 2018-11-30 04:35:50 +0100 | [diff] [blame] | 210 | conn->geran_encr.alg_id = alg_id; |
Neels Hofmeyr | b0779bb | 2018-11-29 23:37:19 +0100 | [diff] [blame] | 211 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 212 | ciph_res.cause = VLR_CIPH_COMPL; |
| 213 | vlr_subscr_rx_ciph_res(conn->vsub, &ciph_res); |
Harald Welte | cf149ee | 2012-01-23 16:40:24 +0100 | [diff] [blame] | 214 | } |
| 215 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 216 | /* Receive a CLEAR REQUEST from BSC */ |
Neels Hofmeyr | 3c20a5e | 2018-11-30 01:08:36 +0100 | [diff] [blame] | 217 | int ran_conn_clear_request(struct ran_conn *conn, uint32_t cause) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 218 | { |
Neels Hofmeyr | c036b79 | 2018-11-29 22:37:51 +0100 | [diff] [blame] | 219 | ran_conn_close(conn, cause); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 220 | return 1; |
| 221 | } |
| 222 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 223 | void msc_stop_paging(struct vlr_subscr *vsub) |
| 224 | { |
| 225 | DEBUGP(DPAG, "Paging can stop for %s\n", vlr_subscr_name(vsub)); |
| 226 | /* tell BSCs and RNCs to stop paging? How? */ |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 227 | } |