Holger Hans Peter Freyther | d2c8558 | 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> |
| 5 | * (C) 2010 by On Waves |
| 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 General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 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 General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <openbsc/bsc_api.h> |
| 26 | #include <openbsc/debug.h> |
Holger Hans Peter Freyther | 6e5c50f | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 27 | #include <openbsc/transaction.h> |
Holger Hans Peter Freyther | d2c8558 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 28 | |
Holger Hans Peter Freyther | 9f619d0 | 2010-06-15 12:03:10 +0800 | [diff] [blame] | 29 | #include <openbsc/gsm_04_11.h> |
| 30 | |
Holger Hans Peter Freyther | d2c8558 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 31 | static void msc_sapi_n_reject(struct gsm_subscriber_connection* conn, int dlci) |
| 32 | { |
Holger Hans Peter Freyther | 9f619d0 | 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 | d2c8558 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 37 | } |
| 38 | |
Holger Hans Peter Freyther | ed4e3bd | 2010-06-15 13:16:52 +0800 | [diff] [blame] | 39 | static void msc_clear_request(struct gsm_subscriber_connection* conn, uint32_t cause) |
| 40 | { |
| 41 | gsm0408_clear_request(conn, cause); |
| 42 | } |
| 43 | |
Holger Hans Peter Freyther | b979579 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 44 | static int msc_compl_l3(struct gsm_subscriber_connection *conn, struct msgb *msg, |
| 45 | uint16_t chosen_channel) |
| 46 | { |
Holger Hans Peter Freyther | 425cfc4 | 2010-07-05 15:34:16 +0800 | [diff] [blame] | 47 | gsm0408_new_conn(conn); |
Holger Hans Peter Freyther | b979579 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 48 | gsm0408_dispatch(conn, msg); |
| 49 | |
| 50 | /* TODO: do better */ |
| 51 | return BSC_API_CONN_POL_ACCEPT; |
| 52 | } |
| 53 | |
| 54 | static void msc_dtap(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| 55 | { |
| 56 | gsm0408_dispatch(conn, msg); |
| 57 | } |
| 58 | |
Holger Hans Peter Freyther | d2c8558 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 59 | static struct bsc_api msc_handler = { |
| 60 | .sapi_n_reject = msc_sapi_n_reject, |
Holger Hans Peter Freyther | ed4e3bd | 2010-06-15 13:16:52 +0800 | [diff] [blame] | 61 | .clear_request = msc_clear_request, |
Holger Hans Peter Freyther | b979579 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 62 | .compl_l3 = msc_compl_l3, |
| 63 | .dtap = msc_dtap, |
Holger Hans Peter Freyther | d2c8558 | 2010-06-15 11:52:51 +0800 | [diff] [blame] | 64 | }; |
| 65 | |
| 66 | struct bsc_api *msc_bsc_api() { |
| 67 | return &msc_handler; |
| 68 | } |
Holger Hans Peter Freyther | 6e5c50f | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 69 | |
| 70 | /* lchan release handling */ |
| 71 | void msc_release_connection(struct gsm_subscriber_connection *conn) |
| 72 | { |
| 73 | struct gsm_trans *trans; |
| 74 | |
| 75 | /* skip when we are in release, e.g. due an error */ |
| 76 | if (conn->in_release) |
| 77 | return; |
| 78 | |
| 79 | /* skip releasing of silent calls as they have no transaction */ |
| 80 | if (conn->silent_call) |
| 81 | return; |
| 82 | |
| 83 | /* check if there is a pending operation */ |
Holger Hans Peter Freyther | 425cfc4 | 2010-07-05 15:34:16 +0800 | [diff] [blame] | 84 | if (conn->loc_operation || conn->sec_operation || conn->anch_operation) |
Holger Hans Peter Freyther | 6e5c50f | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 85 | return; |
| 86 | |
| 87 | llist_for_each_entry(trans, &conn->bts->network->trans_list, entry) { |
| 88 | if (trans->conn == conn) |
| 89 | return; |
| 90 | } |
| 91 | |
| 92 | /* no more connections, asking to release the channel */ |
| 93 | conn->in_release = 1; |
| 94 | gsm0808_clear(conn); |
| 95 | } |