Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 1 | /* main MSC management code... */ |
| 2 | |
| 3 | /* |
| 4 | * (C) 2010 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 | 182c81f | 2010-12-29 16:28:33 +0100 | [diff] [blame] | 42 | if (conn->put_channel) { |
| 43 | conn->put_channel = 0; |
| 44 | subscr_put_channel(conn->subscr); |
| 45 | } |
Holger Hans Peter Freyther | 05c6884 | 2010-11-03 19:01:58 +0100 | [diff] [blame] | 46 | return 1; |
Holger Hans Peter Freyther | f6fb3ef | 2010-06-15 13:16:52 +0800 | [diff] [blame] | 47 | } |
| 48 | |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 49 | static int msc_compl_l3(struct gsm_subscriber_connection *conn, struct msgb *msg, |
| 50 | uint16_t chosen_channel) |
| 51 | { |
Holger Hans Peter Freyther | 02d39b2 | 2010-07-05 15:34:16 +0800 | [diff] [blame] | 52 | gsm0408_new_conn(conn); |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 53 | gsm0408_dispatch(conn, msg); |
| 54 | |
| 55 | /* TODO: do better */ |
Holger Hans Peter Freyther | 70ae5d3 | 2012-11-23 21:33:15 +0100 | [diff] [blame] | 56 | if (conn->silent_call) |
| 57 | return BSC_API_CONN_POL_ACCEPT; |
| 58 | if (conn->loc_operation || conn->sec_operation || conn->anch_operation) |
| 59 | return BSC_API_CONN_POL_ACCEPT; |
| 60 | if (trans_has_conn(conn)) |
| 61 | return BSC_API_CONN_POL_ACCEPT; |
| 62 | return BSC_API_CONN_POL_REJECT; |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 63 | } |
| 64 | |
Holger Hans Peter Freyther | 46caa30 | 2010-11-04 12:18:00 +0100 | [diff] [blame] | 65 | 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] | 66 | { |
| 67 | gsm0408_dispatch(conn, msg); |
| 68 | } |
| 69 | |
Holger Hans Peter Freyther | 40aac3f | 2011-12-27 12:31:02 +0100 | [diff] [blame] | 70 | static void msc_assign_compl(struct gsm_subscriber_connection *conn, |
| 71 | uint8_t rr_cause, uint8_t chosen_channel, |
| 72 | uint8_t encr_alg_id, uint8_t speec) |
| 73 | { |
| 74 | /* |
| 75 | * The mncc code is not doing assignment requests and |
| 76 | * we should not end here. See MNCC_LCHAN_MODIFY |
| 77 | */ |
| 78 | LOGP(DMSC, LOGL_ERROR, |
| 79 | "Assignment complete should not have been reached.\n"); |
| 80 | } |
| 81 | |
| 82 | static void msc_assign_fail(struct gsm_subscriber_connection *conn, |
| 83 | uint8_t cause, uint8_t *rr_cause) |
| 84 | { |
| 85 | /* |
| 86 | * The mncc code is not doing assignment requests and |
| 87 | * we should not end here. See MNCC_LCHAN_MODIFY |
| 88 | */ |
| 89 | LOGP(DMSC, LOGL_ERROR, |
| 90 | "Assignment fail should not have been reached.\n"); |
| 91 | } |
| 92 | |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 93 | static void msc_classmark_chg(struct gsm_subscriber_connection *conn, |
| 94 | const uint8_t *cm2, uint8_t cm2_len, |
| 95 | const uint8_t *cm3, uint8_t cm3_len) |
| 96 | { |
| 97 | struct gsm_subscriber *subscr = conn->subscr; |
| 98 | |
| 99 | if (subscr) { |
| 100 | subscr->equipment.classmark2_len = cm2_len; |
| 101 | memcpy(subscr->equipment.classmark2, cm2, cm2_len); |
| 102 | if (cm3) { |
| 103 | subscr->equipment.classmark3_len = cm3_len; |
| 104 | memcpy(subscr->equipment.classmark3, cm3, cm3_len); |
| 105 | } |
| 106 | db_sync_equipment(&subscr->equipment); |
| 107 | } |
| 108 | } |
| 109 | |
Harald Welte | cf149ee | 2012-01-23 16:40:24 +0100 | [diff] [blame] | 110 | static void msc_ciph_m_compl(struct gsm_subscriber_connection *conn, |
| 111 | struct msgb *msg, uint8_t alg_id) |
| 112 | { |
| 113 | gsm_cbfn *cb; |
| 114 | |
| 115 | DEBUGP(DRR, "CIPHERING MODE COMPLETE\n"); |
| 116 | |
| 117 | /* Safety check */ |
| 118 | if (!conn->sec_operation) { |
| 119 | DEBUGP(DRR, "No authentication/cipher operation in progress !!!\n"); |
| 120 | return; |
| 121 | } |
| 122 | |
| 123 | /* FIXME: check for MI (if any) */ |
| 124 | |
| 125 | /* Call back whatever was in progress (if anything) ... */ |
| 126 | cb = conn->sec_operation->cb; |
| 127 | if (cb) { |
Holger Hans Peter Freyther | a5050b1 | 2012-09-11 11:55:03 +0200 | [diff] [blame] | 128 | cb(GSM_HOOK_RR_SECURITY, GSM_SECURITY_SUCCEEDED, |
Harald Welte | cf149ee | 2012-01-23 16:40:24 +0100 | [diff] [blame] | 129 | NULL, conn, conn->sec_operation->cb_data); |
| 130 | |
| 131 | } |
| 132 | |
| 133 | /* Complete the operation */ |
| 134 | release_security_operation(conn); |
| 135 | } |
| 136 | |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 137 | |
| 138 | |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 139 | static struct bsc_api msc_handler = { |
| 140 | .sapi_n_reject = msc_sapi_n_reject, |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 141 | .compl_l3 = msc_compl_l3, |
| 142 | .dtap = msc_dtap, |
Holger Hans Peter Freyther | 40aac3f | 2011-12-27 12:31:02 +0100 | [diff] [blame] | 143 | .clear_request = msc_clear_request, |
| 144 | .assign_compl = msc_assign_compl, |
| 145 | .assign_fail = msc_assign_fail, |
Harald Welte | 95e862c | 2012-01-23 10:28:35 +0100 | [diff] [blame] | 146 | .classmark_chg = msc_classmark_chg, |
Harald Welte | cf149ee | 2012-01-23 16:40:24 +0100 | [diff] [blame] | 147 | .cipher_mode_compl = msc_ciph_m_compl, |
Holger Hans Peter Freyther | 43b0909 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 148 | }; |
| 149 | |
| 150 | struct bsc_api *msc_bsc_api() { |
| 151 | return &msc_handler; |
| 152 | } |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 153 | |
| 154 | /* lchan release handling */ |
| 155 | void msc_release_connection(struct gsm_subscriber_connection *conn) |
| 156 | { |
| 157 | struct gsm_trans *trans; |
| 158 | |
| 159 | /* skip when we are in release, e.g. due an error */ |
| 160 | if (conn->in_release) |
| 161 | return; |
| 162 | |
| 163 | /* skip releasing of silent calls as they have no transaction */ |
| 164 | if (conn->silent_call) |
| 165 | return; |
| 166 | |
| 167 | /* check if there is a pending operation */ |
Holger Hans Peter Freyther | 02d39b2 | 2010-07-05 15:34:16 +0800 | [diff] [blame] | 168 | if (conn->loc_operation || conn->sec_operation || conn->anch_operation) |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 169 | return; |
| 170 | |
Holger Hans Peter Freyther | 70ae5d3 | 2012-11-23 21:33:15 +0100 | [diff] [blame] | 171 | if (trans_has_conn(conn)) |
| 172 | return; |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 173 | |
| 174 | /* no more connections, asking to release the channel */ |
| 175 | conn->in_release = 1; |
| 176 | gsm0808_clear(conn); |
Holger Hans Peter Freyther | 182c81f | 2010-12-29 16:28:33 +0100 | [diff] [blame] | 177 | if (conn->put_channel) { |
| 178 | conn->put_channel = 0; |
| 179 | subscr_put_channel(conn->subscr); |
| 180 | } |
Holger Hans Peter Freyther | aaa40b8 | 2010-09-16 20:48:15 +0800 | [diff] [blame] | 181 | subscr_con_free(conn); |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 182 | } |