Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 1 | /* Interaction with the SCCP subsystem */ |
| 2 | /* |
Holger Hans Peter Freyther | 56cb729 | 2014-09-02 17:28:40 +0200 | [diff] [blame] | 3 | * (C) 2009-2014 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 4 | * (C) 2009-2014 by On-Waves |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 5 | * All Rights Reserved |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 8 | * it under the terms of the GNU Affero General Public License as published by |
| 9 | * the Free Software Foundation; either version 3 of the License, or |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 15 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 16 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * You should have received a copy of the GNU Affero General Public License |
| 18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <openbsc/gsm_data.h> |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 23 | #include <openbsc/osmo_bsc.h> |
| 24 | #include <openbsc/osmo_bsc_grace.h> |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 25 | #include <openbsc/osmo_msc_data.h> |
Holger Hans Peter Freyther | c85ed4e | 2013-09-02 10:58:35 +0200 | [diff] [blame] | 26 | #include <openbsc/gsm_04_80.h> |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 27 | #include <openbsc/debug.h> |
Holger Hans Peter Freyther | 57d3048 | 2010-11-06 23:56:43 +0100 | [diff] [blame] | 28 | #include <openbsc/ipaccess.h> |
Holger Hans Peter Freyther | 00f4cc2 | 2010-11-06 23:50:06 +0100 | [diff] [blame] | 29 | #include <openbsc/signal.h> |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 30 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 31 | #include <osmocom/core/talloc.h> |
Harald Welte | d36ff76 | 2011-03-23 18:26:56 +0100 | [diff] [blame] | 32 | #include <osmocom/gsm/gsm0808.h> |
| 33 | #include <osmocom/gsm/protocol/gsm_08_08.h> |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 34 | |
| 35 | #include <osmocom/sccp/sccp.h> |
| 36 | |
Holger Hans Peter Freyther | c97d9b4 | 2010-11-06 20:23:58 +0100 | [diff] [blame] | 37 | /* SCCP helper */ |
| 38 | #define SCCP_IT_TIMER 60 |
| 39 | |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 40 | static LLIST_HEAD(active_connections); |
| 41 | |
Holger Hans Peter Freyther | b4e72f8 | 2010-11-15 10:31:53 +0100 | [diff] [blame] | 42 | static void free_queued(struct osmo_bsc_sccp_con *conn) |
| 43 | { |
| 44 | struct msgb *msg; |
| 45 | |
| 46 | while (!llist_empty(&conn->sccp_queue)) { |
| 47 | /* this is not allowed to fail */ |
| 48 | msg = msgb_dequeue(&conn->sccp_queue); |
| 49 | msgb_free(msg); |
| 50 | } |
| 51 | |
| 52 | conn->sccp_queue_size = 0; |
| 53 | } |
| 54 | |
| 55 | static void send_queued(struct osmo_bsc_sccp_con *conn) |
| 56 | { |
| 57 | struct msgb *msg; |
| 58 | |
| 59 | while (!llist_empty(&conn->sccp_queue)) { |
| 60 | /* this is not allowed to fail */ |
| 61 | msg = msgb_dequeue(&conn->sccp_queue); |
| 62 | sccp_connection_write(conn->sccp, msg); |
| 63 | msgb_free(msg); |
| 64 | conn->sccp_queue_size -= 1; |
| 65 | } |
| 66 | } |
| 67 | |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 68 | static void msc_outgoing_sccp_data(struct sccp_connection *conn, |
| 69 | struct msgb *msg, unsigned int len) |
| 70 | { |
Holger Hans Peter Freyther | 3485feb | 2010-11-09 23:28:33 +0100 | [diff] [blame] | 71 | struct osmo_bsc_sccp_con *bsc_con = |
| 72 | (struct osmo_bsc_sccp_con *) conn->data_ctx; |
| 73 | |
| 74 | bsc_handle_dt1(bsc_con, msg, len); |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | static void msc_outgoing_sccp_state(struct sccp_connection *conn, int old_state) |
| 78 | { |
Holger Hans Peter Freyther | af4b5fb | 2010-11-07 00:03:02 +0100 | [diff] [blame] | 79 | struct osmo_bsc_sccp_con *con_data; |
| 80 | |
| 81 | if (conn->connection_state >= SCCP_CONNECTION_STATE_RELEASE_COMPLETE) { |
| 82 | con_data = (struct osmo_bsc_sccp_con *) conn->data_ctx; |
| 83 | if(con_data->conn) { |
| 84 | LOGP(DMSC, LOGL_ERROR, |
Holger Hans Peter Freyther | 74c7dc3 | 2011-07-20 14:30:28 +0200 | [diff] [blame] | 85 | "ERROR: The lchan is still associated.\n"); |
Holger Hans Peter Freyther | af4b5fb | 2010-11-07 00:03:02 +0100 | [diff] [blame] | 86 | gsm0808_clear(con_data->conn); |
| 87 | subscr_con_free(con_data->conn); |
| 88 | con_data->conn = NULL; |
| 89 | } |
| 90 | |
| 91 | con_data->sccp = NULL; |
Holger Hans Peter Freyther | b4e72f8 | 2010-11-15 10:31:53 +0100 | [diff] [blame] | 92 | free_queued(con_data); |
Holger Hans Peter Freyther | af4b5fb | 2010-11-07 00:03:02 +0100 | [diff] [blame] | 93 | sccp_connection_free(conn); |
| 94 | bsc_delete_connection(con_data); |
Holger Hans Peter Freyther | 933daaa | 2010-11-07 00:04:46 +0100 | [diff] [blame] | 95 | } else if (conn->connection_state == SCCP_CONNECTION_STATE_ESTABLISHED) { |
| 96 | LOGP(DMSC, LOGL_DEBUG, "Connection established: %p\n", conn); |
| 97 | con_data = (struct osmo_bsc_sccp_con *) conn->data_ctx; |
| 98 | |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 99 | osmo_timer_del(&con_data->sccp_cc_timeout); |
| 100 | osmo_timer_schedule(&con_data->sccp_it_timeout, SCCP_IT_TIMER, 0); |
Holger Hans Peter Freyther | b4e72f8 | 2010-11-15 10:31:53 +0100 | [diff] [blame] | 101 | |
| 102 | send_queued(con_data); |
Holger Hans Peter Freyther | af4b5fb | 2010-11-07 00:03:02 +0100 | [diff] [blame] | 103 | } |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 104 | } |
| 105 | |
Holger Hans Peter Freyther | 00f4cc2 | 2010-11-06 23:50:06 +0100 | [diff] [blame] | 106 | static void bsc_sccp_force_free(struct osmo_bsc_sccp_con *data) |
| 107 | { |
| 108 | if (data->conn) { |
| 109 | gsm0808_clear(data->conn); |
| 110 | subscr_con_free(data->conn); |
| 111 | data->conn = NULL; |
| 112 | } |
| 113 | |
Holger Hans Peter Freyther | b4e72f8 | 2010-11-15 10:31:53 +0100 | [diff] [blame] | 114 | free_queued(data); |
Holger Hans Peter Freyther | 00f4cc2 | 2010-11-06 23:50:06 +0100 | [diff] [blame] | 115 | sccp_connection_force_free(data->sccp); |
| 116 | data->sccp = NULL; |
| 117 | bsc_delete_connection(data); |
| 118 | } |
| 119 | |
Holger Hans Peter Freyther | c97d9b4 | 2010-11-06 20:23:58 +0100 | [diff] [blame] | 120 | static void sccp_it_timeout(void *_data) |
| 121 | { |
| 122 | struct osmo_bsc_sccp_con *data = |
| 123 | (struct osmo_bsc_sccp_con *) _data; |
| 124 | |
| 125 | sccp_connection_send_it(data->sccp); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 126 | osmo_timer_schedule(&data->sccp_it_timeout, SCCP_IT_TIMER, 0); |
Holger Hans Peter Freyther | c97d9b4 | 2010-11-06 20:23:58 +0100 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | static void sccp_cc_timeout(void *_data) |
| 130 | { |
| 131 | struct osmo_bsc_sccp_con *data = |
| 132 | (struct osmo_bsc_sccp_con *) _data; |
| 133 | |
| 134 | if (data->sccp->connection_state >= SCCP_CONNECTION_STATE_ESTABLISHED) |
| 135 | return; |
| 136 | |
| 137 | LOGP(DMSC, LOGL_ERROR, "The connection was never established.\n"); |
Holger Hans Peter Freyther | 00f4cc2 | 2010-11-06 23:50:06 +0100 | [diff] [blame] | 138 | bsc_sccp_force_free(data); |
Holger Hans Peter Freyther | c97d9b4 | 2010-11-06 20:23:58 +0100 | [diff] [blame] | 139 | } |
| 140 | |
Holger Hans Peter Freyther | 784ca9c | 2011-06-04 16:59:37 +0200 | [diff] [blame] | 141 | static void msc_sccp_write_ipa(struct sccp_connection *conn, struct msgb *msg, |
| 142 | void *global_ctx, void *ctx) |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 143 | { |
Holger Hans Peter Freyther | 44e5dad | 2011-06-04 17:34:02 +0200 | [diff] [blame] | 144 | struct bsc_msc_connection *msc_con; |
| 145 | |
| 146 | if (conn) { |
| 147 | struct osmo_bsc_sccp_con *bsc_con = conn->data_ctx; |
| 148 | msc_con = bsc_con->msc->msc_con; |
Holger Hans Peter Freyther | 56cb729 | 2014-09-02 17:28:40 +0200 | [diff] [blame] | 149 | if (bsc_con->send_ping) { |
| 150 | bsc_con->send_ping = 0; |
| 151 | msc_queue_write_with_ping(msc_con, msg, IPAC_PROTO_SCCP); |
| 152 | return; |
| 153 | } |
Holger Hans Peter Freyther | 44e5dad | 2011-06-04 17:34:02 +0200 | [diff] [blame] | 154 | } else { |
| 155 | msc_con = ctx; |
| 156 | } |
| 157 | |
| 158 | msc_queue_write(msc_con, msg, IPAC_PROTO_SCCP); |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 159 | } |
| 160 | |
| 161 | static int msc_sccp_accept(struct sccp_connection *connection, void *data) |
| 162 | { |
| 163 | LOGP(DMSC, LOGL_DEBUG, "Rejecting incoming SCCP connection.\n"); |
| 164 | return -1; |
| 165 | } |
| 166 | |
| 167 | static int msc_sccp_read(struct msgb *msgb, unsigned int length, void *data) |
| 168 | { |
Holger Hans Peter Freyther | f31a4a4 | 2011-06-04 13:20:04 +0200 | [diff] [blame] | 169 | struct osmo_msc_data *msc = (struct osmo_msc_data *) msgb->cb[0]; |
Holger Hans Peter Freyther | 644b0bf | 2011-06-08 15:52:07 +0200 | [diff] [blame] | 170 | return bsc_handle_udt(msc, msgb, length); |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 171 | } |
| 172 | |
Holger Hans Peter Freyther | 863a55d | 2010-11-10 09:31:41 +0100 | [diff] [blame] | 173 | int bsc_queue_for_msc(struct osmo_bsc_sccp_con *conn, struct msgb *msg) |
Holger Hans Peter Freyther | 4582586 | 2010-11-04 11:48:49 +0100 | [diff] [blame] | 174 | { |
Holger Hans Peter Freyther | 863a55d | 2010-11-10 09:31:41 +0100 | [diff] [blame] | 175 | struct sccp_connection *sccp = conn->sccp; |
Holger Hans Peter Freyther | ca5c022 | 2010-11-06 23:35:02 +0100 | [diff] [blame] | 176 | |
Holger Hans Peter Freyther | b4e72f8 | 2010-11-15 10:31:53 +0100 | [diff] [blame] | 177 | if (sccp->connection_state > SCCP_CONNECTION_STATE_ESTABLISHED) { |
| 178 | LOGP(DMSC, LOGL_ERROR, "Connection closing, dropping packet on: %p\n", sccp); |
Holger Hans Peter Freyther | ca5c022 | 2010-11-06 23:35:02 +0100 | [diff] [blame] | 179 | msgb_free(msg); |
Holger Hans Peter Freyther | b4e72f8 | 2010-11-15 10:31:53 +0100 | [diff] [blame] | 180 | } else if (sccp->connection_state == SCCP_CONNECTION_STATE_ESTABLISHED |
| 181 | && conn->sccp_queue_size == 0) { |
| 182 | sccp_connection_write(sccp, msg); |
| 183 | msgb_free(msg); |
| 184 | } else if (conn->sccp_queue_size > 10) { |
| 185 | LOGP(DMSC, LOGL_ERROR, "Connection closing, dropping packet on: %p\n", sccp); |
| 186 | msgb_free(msg); |
| 187 | } else { |
| 188 | LOGP(DMSC, LOGL_DEBUG, "Queueing packet on %p. Queue size: %d\n", sccp, conn->sccp_queue_size); |
| 189 | conn->sccp_queue_size += 1; |
| 190 | msgb_enqueue(&conn->sccp_queue, msg); |
Holger Hans Peter Freyther | ca5c022 | 2010-11-06 23:35:02 +0100 | [diff] [blame] | 191 | } |
| 192 | |
Holger Hans Peter Freyther | 4582586 | 2010-11-04 11:48:49 +0100 | [diff] [blame] | 193 | return 0; |
| 194 | } |
| 195 | |
Jacob Erlbeck | 56595f8 | 2013-09-11 10:46:55 +0200 | [diff] [blame] | 196 | enum bsc_con bsc_create_new_connection(struct gsm_subscriber_connection *conn, |
Holger Hans Peter Freyther | 56cb729 | 2014-09-02 17:28:40 +0200 | [diff] [blame] | 197 | struct osmo_msc_data *msc, int send_ping) |
Holger Hans Peter Freyther | cc48fb8 | 2010-11-05 11:10:46 +0100 | [diff] [blame] | 198 | { |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 199 | struct osmo_bsc_sccp_con *bsc_con; |
| 200 | struct sccp_connection *sccp; |
| 201 | |
Holger Hans Peter Freyther | 354c87c | 2011-06-07 11:40:20 +0200 | [diff] [blame] | 202 | /* This should not trigger */ |
Jacob Erlbeck | 56595f8 | 2013-09-11 10:46:55 +0200 | [diff] [blame] | 203 | if (!msc || !msc->msc_con->is_authenticated) { |
Holger Hans Peter Freyther | 354c87c | 2011-06-07 11:40:20 +0200 | [diff] [blame] | 204 | LOGP(DMSC, LOGL_ERROR, |
| 205 | "How did this happen? MSC is not connected. Dropping.\n"); |
Jacob Erlbeck | 56595f8 | 2013-09-11 10:46:55 +0200 | [diff] [blame] | 206 | return BSC_CON_REJECT_NO_LINK; |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 207 | } |
| 208 | |
Holger Hans Peter Freyther | 3d119f1 | 2012-08-30 16:43:28 +0200 | [diff] [blame] | 209 | if (!bsc_grace_allow_new_connection(conn->bts->network, conn->bts)) { |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 210 | LOGP(DMSC, LOGL_NOTICE, "BSC in grace period. No new connections.\n"); |
Jacob Erlbeck | 56595f8 | 2013-09-11 10:46:55 +0200 | [diff] [blame] | 211 | return BSC_CON_REJECT_RF_GRACE; |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | sccp = sccp_connection_socket(); |
| 215 | if (!sccp) { |
| 216 | LOGP(DMSC, LOGL_ERROR, "Failed to allocate memory.\n"); |
Jacob Erlbeck | 56595f8 | 2013-09-11 10:46:55 +0200 | [diff] [blame] | 217 | return BSC_CON_NO_MEM; |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | bsc_con = talloc_zero(conn->bts, struct osmo_bsc_sccp_con); |
| 221 | if (!bsc_con) { |
| 222 | LOGP(DMSC, LOGL_ERROR, "Failed to allocate.\n"); |
| 223 | sccp_connection_free(sccp); |
Jacob Erlbeck | 56595f8 | 2013-09-11 10:46:55 +0200 | [diff] [blame] | 224 | return BSC_CON_NO_MEM; |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | /* callbacks */ |
| 228 | sccp->state_cb = msc_outgoing_sccp_state; |
| 229 | sccp->data_cb = msc_outgoing_sccp_data; |
| 230 | sccp->data_ctx = bsc_con; |
| 231 | |
Holger Hans Peter Freyther | 56cb729 | 2014-09-02 17:28:40 +0200 | [diff] [blame] | 232 | bsc_con->send_ping = send_ping; |
| 233 | |
Holger Hans Peter Freyther | c97d9b4 | 2010-11-06 20:23:58 +0100 | [diff] [blame] | 234 | /* prepare the timers */ |
| 235 | bsc_con->sccp_it_timeout.cb = sccp_it_timeout; |
| 236 | bsc_con->sccp_it_timeout.data = bsc_con; |
| 237 | bsc_con->sccp_cc_timeout.cb = sccp_cc_timeout; |
| 238 | bsc_con->sccp_cc_timeout.data = bsc_con; |
| 239 | |
Holger Hans Peter Freyther | b4e72f8 | 2010-11-15 10:31:53 +0100 | [diff] [blame] | 240 | INIT_LLIST_HEAD(&bsc_con->sccp_queue); |
| 241 | |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 242 | bsc_con->sccp = sccp; |
Holger Hans Peter Freyther | 4cdb050 | 2011-06-04 14:51:51 +0200 | [diff] [blame] | 243 | bsc_con->msc = msc; |
Holger Hans Peter Freyther | 7e90108 | 2010-11-06 20:15:17 +0100 | [diff] [blame] | 244 | bsc_con->conn = conn; |
Holger Hans Peter Freyther | cc98d18 | 2011-06-27 21:02:44 +0200 | [diff] [blame] | 245 | llist_add_tail(&bsc_con->entry, &active_connections); |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 246 | conn->sccp_con = bsc_con; |
Jacob Erlbeck | 56595f8 | 2013-09-11 10:46:55 +0200 | [diff] [blame] | 247 | return BSC_CON_SUCCESS; |
Holger Hans Peter Freyther | cc48fb8 | 2010-11-05 11:10:46 +0100 | [diff] [blame] | 248 | } |
| 249 | |
Holger Hans Peter Freyther | 7e90108 | 2010-11-06 20:15:17 +0100 | [diff] [blame] | 250 | int bsc_open_connection(struct osmo_bsc_sccp_con *conn, struct msgb *msg) |
Holger Hans Peter Freyther | 9b17c76 | 2010-11-05 19:48:47 +0100 | [diff] [blame] | 251 | { |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 252 | osmo_timer_schedule(&conn->sccp_cc_timeout, 10, 0); |
Holger Hans Peter Freyther | cf256d6 | 2010-11-08 18:49:23 +0100 | [diff] [blame] | 253 | sccp_connection_connect(conn->sccp, &sccp_ssn_bssap, msg); |
| 254 | msgb_free(msg); |
| 255 | return 0; |
Holger Hans Peter Freyther | 9b17c76 | 2010-11-05 19:48:47 +0100 | [diff] [blame] | 256 | } |
| 257 | |
Holger Hans Peter Freyther | 7e90108 | 2010-11-06 20:15:17 +0100 | [diff] [blame] | 258 | int bsc_delete_connection(struct osmo_bsc_sccp_con *sccp) |
Holger Hans Peter Freyther | 9b17c76 | 2010-11-05 19:48:47 +0100 | [diff] [blame] | 259 | { |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 260 | if (!sccp) |
Holger Hans Peter Freyther | 9b17c76 | 2010-11-05 19:48:47 +0100 | [diff] [blame] | 261 | return 0; |
| 262 | |
Holger Hans Peter Freyther | 7e90108 | 2010-11-06 20:15:17 +0100 | [diff] [blame] | 263 | if (sccp->conn) |
| 264 | LOGP(DMSC, LOGL_ERROR, "Should have been cleared.\n"); |
| 265 | |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 266 | llist_del(&sccp->entry); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 267 | osmo_timer_del(&sccp->sccp_it_timeout); |
| 268 | osmo_timer_del(&sccp->sccp_cc_timeout); |
Holger Hans Peter Freyther | b8781d2 | 2010-11-06 18:08:43 +0100 | [diff] [blame] | 269 | talloc_free(sccp); |
Holger Hans Peter Freyther | 9b17c76 | 2010-11-05 19:48:47 +0100 | [diff] [blame] | 270 | return 0; |
| 271 | } |
| 272 | |
Jacob Erlbeck | 1b89402 | 2013-08-28 10:16:54 +0200 | [diff] [blame] | 273 | static void bsc_notify_msc_lost(struct osmo_bsc_sccp_con *con) |
| 274 | { |
| 275 | struct gsm_subscriber_connection *conn = con->conn; |
| 276 | |
| 277 | /* send USSD notification if string configured and con->data is set */ |
| 278 | if (!conn) |
| 279 | return; |
| 280 | |
| 281 | /* check for config string */ |
| 282 | if (!con->msc->ussd_msc_lost_txt) |
| 283 | return; |
| 284 | if (con->msc->ussd_msc_lost_txt[0] == '\0') |
| 285 | return; |
| 286 | |
| 287 | /* send USSD notification */ |
Holger Hans Peter Freyther | 33b9641 | 2013-11-15 16:47:08 +0100 | [diff] [blame] | 288 | gsm0480_send_ussdNotify(conn, 1, conn->sccp_con->msc->ussd_msc_lost_txt); |
Jacob Erlbeck | 1b89402 | 2013-08-28 10:16:54 +0200 | [diff] [blame] | 289 | gsm0480_send_releaseComplete(conn); |
| 290 | } |
| 291 | |
| 292 | static void bsc_notify_and_close_conns(struct bsc_msc_connection *msc_con) |
Holger Hans Peter Freyther | 00f4cc2 | 2010-11-06 23:50:06 +0100 | [diff] [blame] | 293 | { |
| 294 | struct osmo_bsc_sccp_con *con, *tmp; |
| 295 | |
Holger Hans Peter Freyther | 8c176cc | 2011-06-25 14:47:57 +0200 | [diff] [blame] | 296 | llist_for_each_entry_safe(con, tmp, &active_connections, entry) { |
Jacob Erlbeck | 1b89402 | 2013-08-28 10:16:54 +0200 | [diff] [blame] | 297 | if (con->msc->msc_con != msc_con) |
| 298 | continue; |
| 299 | |
| 300 | bsc_notify_msc_lost(con); |
| 301 | bsc_sccp_force_free(con); |
Holger Hans Peter Freyther | 8c176cc | 2011-06-25 14:47:57 +0200 | [diff] [blame] | 302 | } |
Holger Hans Peter Freyther | 00f4cc2 | 2010-11-06 23:50:06 +0100 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | static int handle_msc_signal(unsigned int subsys, unsigned int signal, |
| 306 | void *handler_data, void *signal_data) |
| 307 | { |
Holger Hans Peter Freyther | 0e412c7 | 2011-06-27 21:01:55 +0200 | [diff] [blame] | 308 | struct msc_signal_data *msc; |
Holger Hans Peter Freyther | 00f4cc2 | 2010-11-06 23:50:06 +0100 | [diff] [blame] | 309 | |
| 310 | if (subsys != SS_MSC) |
| 311 | return 0; |
| 312 | |
Holger Hans Peter Freyther | 0e412c7 | 2011-06-27 21:01:55 +0200 | [diff] [blame] | 313 | msc = signal_data; |
Holger Hans Peter Freyther | 00f4cc2 | 2010-11-06 23:50:06 +0100 | [diff] [blame] | 314 | if (signal == S_MSC_LOST) |
Jacob Erlbeck | 1b89402 | 2013-08-28 10:16:54 +0200 | [diff] [blame] | 315 | bsc_notify_and_close_conns(msc->data->msc_con); |
Holger Hans Peter Freyther | 00f4cc2 | 2010-11-06 23:50:06 +0100 | [diff] [blame] | 316 | |
| 317 | return 0; |
| 318 | } |
| 319 | |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 320 | int osmo_bsc_sccp_init(struct gsm_network *gsmnet) |
| 321 | { |
| 322 | sccp_set_log_area(DSCCP); |
| 323 | sccp_system_init(msc_sccp_write_ipa, gsmnet); |
| 324 | sccp_connection_set_incoming(&sccp_ssn_bssap, msc_sccp_accept, NULL); |
Holger Hans Peter Freyther | 3485feb | 2010-11-09 23:28:33 +0100 | [diff] [blame] | 325 | sccp_set_read(&sccp_ssn_bssap, msc_sccp_read, gsmnet); |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 326 | |
Pablo Neira Ayuso | bbc5b99 | 2011-05-06 12:12:31 +0200 | [diff] [blame] | 327 | osmo_signal_register_handler(SS_MSC, handle_msc_signal, gsmnet); |
Holger Hans Peter Freyther | 00f4cc2 | 2010-11-06 23:50:06 +0100 | [diff] [blame] | 328 | |
Holger Hans Peter Freyther | f3d1ae7 | 2010-11-03 16:40:03 +0100 | [diff] [blame] | 329 | return 0; |
| 330 | } |