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 | |
| 24 | #include <openbsc/bsc_api.h> |
| 25 | #include <openbsc/debug.h> |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 26 | #include <openbsc/transaction.h> |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 27 | #include <openbsc/db.h> |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 28 | |
Holger Hans Peter Freyther | 6a3d765 | 2010-06-15 12:03:10 +0800 | [diff] [blame] | 29 | #include <openbsc/gsm_04_11.h> |
| 30 | |
Holger Hans Peter Freyther | adb6e1c | 2010-09-18 06:44:24 +0800 | [diff] [blame] | 31 | static void msc_sapi_n_reject(struct gsm_subscriber_connection *conn, int dlci) |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 32 | { |
Holger Hans Peter Freyther | 6a3d765 | 2010-06-15 12:03:10 +0800 | [diff] [blame] | 33 | int sapi = dlci & 0x7; |
| 34 | |
| 35 | if (sapi == UM_SAPI_SMS) |
| 36 | gsm411_sapi_n_reject(conn); |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 37 | } |
| 38 | |
Holger Hans Peter Freyther | 05c6884 | 2010-11-03 19:01:58 +0100 | [diff] [blame] | 39 | static int msc_clear_request(struct gsm_subscriber_connection *conn, uint32_t cause) |
Holger Hans Peter Freyther | f6fb3ef | 2010-06-15 13:16:52 +0800 | [diff] [blame] | 40 | { |
| 41 | gsm0408_clear_request(conn, cause); |
Holger Hans Peter Freyther | 05c6884 | 2010-11-03 19:01:58 +0100 | [diff] [blame] | 42 | return 1; |
Holger Hans Peter Freyther | f6fb3ef | 2010-06-15 13:16:52 +0800 | [diff] [blame] | 43 | } |
| 44 | |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 45 | static int msc_compl_l3(struct gsm_subscriber_connection *conn, struct msgb *msg, |
| 46 | uint16_t chosen_channel) |
| 47 | { |
Holger Hans Peter Freyther | 02d39b2 | 2010-07-05 15:34:16 +0800 | [diff] [blame] | 48 | gsm0408_new_conn(conn); |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 49 | gsm0408_dispatch(conn, msg); |
| 50 | |
| 51 | /* TODO: do better */ |
Holger Hans Peter Freyther | 70ae5d3 | 2012-11-23 21:33:15 +0100 | [diff] [blame] | 52 | if (conn->silent_call) |
| 53 | return BSC_API_CONN_POL_ACCEPT; |
| 54 | if (conn->loc_operation || conn->sec_operation || conn->anch_operation) |
| 55 | return BSC_API_CONN_POL_ACCEPT; |
| 56 | if (trans_has_conn(conn)) |
| 57 | return BSC_API_CONN_POL_ACCEPT; |
Jacob Erlbeck | 8e68b56 | 2014-01-30 21:01:12 +0100 | [diff] [blame] | 58 | |
| 59 | LOGP(DRR, LOGL_INFO, "MSC Complete L3: Rejecting connection.\n"); |
Holger Hans Peter Freyther | 70ae5d3 | 2012-11-23 21:33:15 +0100 | [diff] [blame] | 60 | return BSC_API_CONN_POL_REJECT; |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 61 | } |
| 62 | |
Holger Hans Peter Freyther | 46caa30 | 2010-11-04 12:18:00 +0100 | [diff] [blame] | 63 | static void msc_dtap(struct gsm_subscriber_connection *conn, uint8_t link_id, struct msgb *msg) |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 64 | { |
| 65 | gsm0408_dispatch(conn, msg); |
| 66 | } |
| 67 | |
Holger Hans Peter Freyther | 40aac3f | 2011-12-27 12:31:02 +0100 | [diff] [blame] | 68 | static void msc_assign_compl(struct gsm_subscriber_connection *conn, |
| 69 | uint8_t rr_cause, uint8_t chosen_channel, |
| 70 | uint8_t encr_alg_id, uint8_t speec) |
| 71 | { |
Jacob Erlbeck | 8e68b56 | 2014-01-30 21:01:12 +0100 | [diff] [blame] | 72 | LOGP(DRR, LOGL_DEBUG, "MSC assign complete (do nothing).\n"); |
Holger Hans Peter Freyther | 40aac3f | 2011-12-27 12:31:02 +0100 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | static void msc_assign_fail(struct gsm_subscriber_connection *conn, |
| 76 | uint8_t cause, uint8_t *rr_cause) |
| 77 | { |
Jacob Erlbeck | 8e68b56 | 2014-01-30 21:01:12 +0100 | [diff] [blame] | 78 | LOGP(DRR, LOGL_DEBUG, "MSC assign failure (do nothing).\n"); |
Holger Hans Peter Freyther | 40aac3f | 2011-12-27 12:31:02 +0100 | [diff] [blame] | 79 | } |
| 80 | |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 81 | static void msc_classmark_chg(struct gsm_subscriber_connection *conn, |
| 82 | const uint8_t *cm2, uint8_t cm2_len, |
| 83 | const uint8_t *cm3, uint8_t cm3_len) |
| 84 | { |
| 85 | struct gsm_subscriber *subscr = conn->subscr; |
| 86 | |
| 87 | if (subscr) { |
| 88 | subscr->equipment.classmark2_len = cm2_len; |
| 89 | memcpy(subscr->equipment.classmark2, cm2, cm2_len); |
| 90 | if (cm3) { |
| 91 | subscr->equipment.classmark3_len = cm3_len; |
| 92 | memcpy(subscr->equipment.classmark3, cm3, cm3_len); |
| 93 | } |
| 94 | db_sync_equipment(&subscr->equipment); |
| 95 | } |
| 96 | } |
| 97 | |
Harald Welte | cf149ee | 2012-01-23 16:40:24 +0100 | [diff] [blame] | 98 | static void msc_ciph_m_compl(struct gsm_subscriber_connection *conn, |
| 99 | struct msgb *msg, uint8_t alg_id) |
| 100 | { |
| 101 | gsm_cbfn *cb; |
| 102 | |
| 103 | DEBUGP(DRR, "CIPHERING MODE COMPLETE\n"); |
| 104 | |
| 105 | /* Safety check */ |
| 106 | if (!conn->sec_operation) { |
| 107 | DEBUGP(DRR, "No authentication/cipher operation in progress !!!\n"); |
| 108 | return; |
| 109 | } |
| 110 | |
| 111 | /* FIXME: check for MI (if any) */ |
| 112 | |
| 113 | /* Call back whatever was in progress (if anything) ... */ |
| 114 | cb = conn->sec_operation->cb; |
| 115 | if (cb) { |
Holger Hans Peter Freyther | a5050b1 | 2012-09-11 11:55:03 +0200 | [diff] [blame] | 116 | cb(GSM_HOOK_RR_SECURITY, GSM_SECURITY_SUCCEEDED, |
Harald Welte | cf149ee | 2012-01-23 16:40:24 +0100 | [diff] [blame] | 117 | NULL, conn, conn->sec_operation->cb_data); |
| 118 | |
| 119 | } |
| 120 | |
| 121 | /* Complete the operation */ |
| 122 | release_security_operation(conn); |
| 123 | } |
| 124 | |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 125 | |
| 126 | |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 127 | static struct bsc_api msc_handler = { |
| 128 | .sapi_n_reject = msc_sapi_n_reject, |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 129 | .compl_l3 = msc_compl_l3, |
| 130 | .dtap = msc_dtap, |
Holger Hans Peter Freyther | 40aac3f | 2011-12-27 12:31:02 +0100 | [diff] [blame] | 131 | .clear_request = msc_clear_request, |
| 132 | .assign_compl = msc_assign_compl, |
| 133 | .assign_fail = msc_assign_fail, |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 134 | .classmark_chg = msc_classmark_chg, |
Harald Welte | cf149ee | 2012-01-23 16:40:24 +0100 | [diff] [blame] | 135 | .cipher_mode_compl = msc_ciph_m_compl, |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 136 | }; |
| 137 | |
| 138 | struct bsc_api *msc_bsc_api() { |
| 139 | return &msc_handler; |
| 140 | } |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 141 | |
| 142 | /* lchan release handling */ |
| 143 | void msc_release_connection(struct gsm_subscriber_connection *conn) |
| 144 | { |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 145 | /* skip when we are in release, e.g. due an error */ |
| 146 | if (conn->in_release) |
| 147 | return; |
| 148 | |
| 149 | /* skip releasing of silent calls as they have no transaction */ |
| 150 | if (conn->silent_call) |
| 151 | return; |
| 152 | |
| 153 | /* check if there is a pending operation */ |
Holger Hans Peter Freyther | 02d39b2 | 2010-07-05 15:34:16 +0800 | [diff] [blame] | 154 | if (conn->loc_operation || conn->sec_operation || conn->anch_operation) |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 155 | return; |
| 156 | |
Holger Hans Peter Freyther | 70ae5d3 | 2012-11-23 21:33:15 +0100 | [diff] [blame] | 157 | if (trans_has_conn(conn)) |
| 158 | return; |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 159 | |
| 160 | /* no more connections, asking to release the channel */ |
Holger Hans Peter Freyther | e7bd863 | 2013-06-30 15:30:47 +0200 | [diff] [blame] | 161 | |
| 162 | /* |
| 163 | * We had stopped the LU expire timer T3212. Now we are about |
| 164 | * to send the MS back to the idle state and this should lead |
| 165 | * to restarting the timer. Set the new expiration time. |
| 166 | */ |
| 167 | if (conn->expire_timer_stopped) |
| 168 | subscr_update_expire_lu(conn->subscr, conn->bts); |
| 169 | |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 170 | conn->in_release = 1; |
| 171 | gsm0808_clear(conn); |
Holger Hans Peter Freyther | aaa40b8 | 2010-09-16 20:48:15 +0800 | [diff] [blame] | 172 | subscr_con_free(conn); |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 173 | } |