Holger Hans Peter Freyther | ec32b58 | 2010-03-23 07:40:46 +0100 | [diff] [blame] | 1 | /* GSM 08.08 like API for OpenBSC. The bridge from MSC to BSC */ |
| 2 | |
| 3 | /* (C) 2010 by Holger Hans Peter Freyther |
Holger Hans Peter Freyther | 85531cc | 2010-10-06 20:37:09 +0800 | [diff] [blame] | 4 | * (C) 2010 by On-Waves |
Holger Hans Peter Freyther | 2a9285c | 2010-06-14 18:03:06 +0800 | [diff] [blame] | 5 | * (C) 2009 by Harald Welte <laforge@gnumonks.org> |
Holger Hans Peter Freyther | ec32b58 | 2010-03-23 07:40:46 +0100 | [diff] [blame] | 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> |
Holger Hans Peter Freyther | 9c595b7 | 2010-06-15 11:20:52 +0800 | [diff] [blame] | 26 | #include <openbsc/bsc_rll.h> |
Holger Hans Peter Freyther | abcddf1 | 2010-06-14 18:20:15 +0800 | [diff] [blame] | 27 | #include <openbsc/gsm_data.h> |
| 28 | #include <openbsc/signal.h> |
Holger Hans Peter Freyther | ec32b58 | 2010-03-23 07:40:46 +0100 | [diff] [blame] | 29 | #include <openbsc/abis_rsl.h> |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 30 | #include <openbsc/chan_alloc.h> |
Holger Hans Peter Freyther | f2553a6 | 2010-06-30 12:58:14 +0800 | [diff] [blame] | 31 | #include <openbsc/handover.h> |
Holger Hans Peter Freyther | 49ab278 | 2010-07-05 11:38:37 +0800 | [diff] [blame] | 32 | #include <openbsc/debug.h> |
Holger Hans Peter Freyther | ec32b58 | 2010-03-23 07:40:46 +0100 | [diff] [blame] | 33 | |
Holger Hans Peter Freyther | 6c199e7 | 2010-11-04 11:18:03 +0100 | [diff] [blame] | 34 | #include <osmocore/protocol/gsm_08_08.h> |
| 35 | |
Holger Hans Peter Freyther | abcddf1 | 2010-06-14 18:20:15 +0800 | [diff] [blame] | 36 | #include <osmocore/talloc.h> |
| 37 | |
Holger Hans Peter Freyther | 79f763f | 2010-09-16 00:53:37 +0800 | [diff] [blame] | 38 | static LLIST_HEAD(sub_connections); |
| 39 | |
Holger Hans Peter Freyther | 9c595b7 | 2010-06-15 11:20:52 +0800 | [diff] [blame] | 40 | static void rll_ind_cb(struct gsm_lchan *, uint8_t, void *, enum bsc_rllr_ind); |
| 41 | static void send_sapi_reject(struct gsm_subscriber_connection *conn, int link_id); |
Holger Hans Peter Freyther | f05750c | 2010-11-14 19:29:42 +0100 | [diff] [blame^] | 42 | static void handle_release(struct gsm_subscriber_connection *conn, struct bsc_api *bsc, struct gsm_lchan *lchan); |
Holger Hans Peter Freyther | 9c595b7 | 2010-06-15 11:20:52 +0800 | [diff] [blame] | 43 | |
Holger Hans Peter Freyther | b094171 | 2010-11-04 12:06:57 +0100 | [diff] [blame] | 44 | /* GSM 08.08 3.2.2.33 */ |
| 45 | static u_int8_t lchan_to_chosen_channel(struct gsm_lchan *lchan) |
| 46 | { |
| 47 | u_int8_t channel_mode = 0, channel = 0; |
| 48 | |
| 49 | switch (lchan->tch_mode) { |
| 50 | case GSM48_CMODE_SPEECH_V1: |
| 51 | case GSM48_CMODE_SPEECH_EFR: |
| 52 | case GSM48_CMODE_SPEECH_AMR: |
| 53 | channel_mode = 0x9; |
| 54 | break; |
| 55 | case GSM48_CMODE_SIGN: |
| 56 | channel_mode = 0x8; |
| 57 | break; |
| 58 | case GSM48_CMODE_DATA_14k5: |
| 59 | channel_mode = 0xe; |
| 60 | break; |
| 61 | case GSM48_CMODE_DATA_12k0: |
| 62 | channel_mode = 0xb; |
| 63 | break; |
| 64 | case GSM48_CMODE_DATA_6k0: |
| 65 | channel_mode = 0xc; |
| 66 | break; |
| 67 | case GSM48_CMODE_DATA_3k6: |
| 68 | channel_mode = 0xd; |
| 69 | break; |
| 70 | } |
| 71 | |
| 72 | switch (lchan->type) { |
| 73 | case GSM_LCHAN_NONE: |
| 74 | channel = 0x0; |
| 75 | break; |
| 76 | case GSM_LCHAN_SDCCH: |
| 77 | channel = 0x1; |
| 78 | break; |
| 79 | case GSM_LCHAN_TCH_F: |
| 80 | channel = 0x8; |
| 81 | break; |
| 82 | case GSM_LCHAN_TCH_H: |
| 83 | channel = 0x9; |
| 84 | break; |
| 85 | case GSM_LCHAN_UNKNOWN: |
| 86 | LOGP(DMSC, LOGL_ERROR, "Unknown lchan type: %p\n", lchan); |
| 87 | break; |
| 88 | } |
| 89 | |
| 90 | return channel_mode << 4 | channel; |
| 91 | } |
| 92 | |
| 93 | static u_int8_t chan_mode_to_speech(struct gsm_lchan *lchan) |
| 94 | { |
| 95 | int mode = 0; |
| 96 | |
| 97 | switch (lchan->tch_mode) { |
| 98 | case GSM48_CMODE_SPEECH_V1: |
| 99 | mode = 1; |
| 100 | break; |
| 101 | case GSM48_CMODE_SPEECH_EFR: |
| 102 | mode = 0x11; |
| 103 | break; |
| 104 | case GSM48_CMODE_SPEECH_AMR: |
| 105 | mode = 0x21; |
| 106 | break; |
| 107 | case GSM48_CMODE_SIGN: |
| 108 | case GSM48_CMODE_DATA_14k5: |
| 109 | case GSM48_CMODE_DATA_12k0: |
| 110 | case GSM48_CMODE_DATA_6k0: |
| 111 | case GSM48_CMODE_DATA_3k6: |
| 112 | default: |
| 113 | LOGP(DMSC, LOGL_ERROR, "Using non speech mode: %d\n", mode); |
| 114 | return 0; |
| 115 | break; |
| 116 | } |
| 117 | |
| 118 | /* assume to always do AMR HR on any TCH type */ |
| 119 | if (lchan->type == GSM_LCHAN_TCH_H || |
| 120 | lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) |
| 121 | mode |= 0x4; |
| 122 | |
| 123 | return mode; |
| 124 | } |
| 125 | |
| 126 | |
Holger Hans Peter Freyther | a2aedad | 2010-09-16 00:47:32 +0800 | [diff] [blame] | 127 | struct gsm_subscriber_connection *subscr_con_allocate(struct gsm_lchan *lchan) |
| 128 | { |
| 129 | struct gsm_subscriber_connection *conn; |
| 130 | |
| 131 | conn = talloc_zero(lchan->ts->trx->bts->network, struct gsm_subscriber_connection); |
| 132 | if (!conn) |
| 133 | return NULL; |
| 134 | |
| 135 | /* Configure the time and start it so it will be closed */ |
| 136 | conn->lchan = lchan; |
| 137 | conn->bts = lchan->ts->trx->bts; |
| 138 | lchan->conn = conn; |
Holger Hans Peter Freyther | 79f763f | 2010-09-16 00:53:37 +0800 | [diff] [blame] | 139 | llist_add_tail(&conn->entry, &sub_connections); |
Holger Hans Peter Freyther | a2aedad | 2010-09-16 00:47:32 +0800 | [diff] [blame] | 140 | return conn; |
| 141 | } |
| 142 | |
| 143 | /* TODO: move subscriber put here... */ |
| 144 | void subscr_con_free(struct gsm_subscriber_connection *conn) |
| 145 | { |
Holger Hans Peter Freyther | a2aedad | 2010-09-16 00:47:32 +0800 | [diff] [blame] | 146 | if (!conn) |
| 147 | return; |
| 148 | |
| 149 | |
| 150 | if (conn->subscr) { |
| 151 | subscr_put(conn->subscr); |
| 152 | conn->subscr = NULL; |
| 153 | } |
| 154 | |
| 155 | |
Holger Hans Peter Freyther | a2828fa | 2010-11-14 15:50:42 +0100 | [diff] [blame] | 156 | if (conn->ho_lchan) { |
Holger Hans Peter Freyther | a2aedad | 2010-09-16 00:47:32 +0800 | [diff] [blame] | 157 | LOGP(DNM, LOGL_ERROR, "The ho_lchan should have been cleared.\n"); |
Holger Hans Peter Freyther | a2828fa | 2010-11-14 15:50:42 +0100 | [diff] [blame] | 158 | conn->ho_lchan->conn = NULL; |
| 159 | } |
| 160 | |
| 161 | if (conn->lchan) { |
| 162 | LOGP(DNM, LOGL_ERROR, "The lchan should have been cleared.\n"); |
| 163 | conn->lchan->conn = NULL; |
| 164 | } |
Holger Hans Peter Freyther | a2aedad | 2010-09-16 00:47:32 +0800 | [diff] [blame] | 165 | |
Holger Hans Peter Freyther | 79f763f | 2010-09-16 00:53:37 +0800 | [diff] [blame] | 166 | llist_del(&conn->entry); |
Holger Hans Peter Freyther | a2aedad | 2010-09-16 00:47:32 +0800 | [diff] [blame] | 167 | talloc_free(conn); |
Holger Hans Peter Freyther | a2aedad | 2010-09-16 00:47:32 +0800 | [diff] [blame] | 168 | } |
| 169 | |
Holger Hans Peter Freyther | abcddf1 | 2010-06-14 18:20:15 +0800 | [diff] [blame] | 170 | int bsc_api_init(struct gsm_network *network, struct bsc_api *api) |
| 171 | { |
| 172 | network->bsc_api = api; |
| 173 | return 0; |
| 174 | } |
Holger Hans Peter Freyther | ec32b58 | 2010-03-23 07:40:46 +0100 | [diff] [blame] | 175 | |
| 176 | int gsm0808_submit_dtap(struct gsm_subscriber_connection *conn, |
Holger Hans Peter Freyther | 8d380dc | 2010-11-10 10:16:02 +0100 | [diff] [blame] | 177 | struct msgb *msg, int link_id, int allow_sach) |
Holger Hans Peter Freyther | ec32b58 | 2010-03-23 07:40:46 +0100 | [diff] [blame] | 178 | { |
Holger Hans Peter Freyther | 9c595b7 | 2010-06-15 11:20:52 +0800 | [diff] [blame] | 179 | uint8_t sapi = link_id & 0x7; |
Holger Hans Peter Freyther | ec32b58 | 2010-03-23 07:40:46 +0100 | [diff] [blame] | 180 | msg->lchan = conn->lchan; |
| 181 | msg->trx = msg->lchan->ts->trx; |
Holger Hans Peter Freyther | 9c595b7 | 2010-06-15 11:20:52 +0800 | [diff] [blame] | 182 | |
Holger Hans Peter Freyther | 8d380dc | 2010-11-10 10:16:02 +0100 | [diff] [blame] | 183 | /* If we are on a TCH and need to submit a SMS (on SAPI=3) we need to use the SACH */ |
| 184 | if (allow_sach && sapi != 0) { |
| 185 | if (conn->lchan->type == GSM_LCHAN_TCH_F || conn->lchan->type == GSM_LCHAN_TCH_H) |
| 186 | link_id |= 0x40; |
| 187 | } |
| 188 | |
Holger Hans Peter Freyther | f6d0e06 | 2010-06-17 17:48:13 +0800 | [diff] [blame] | 189 | msg->l3h = msg->data; |
Holger Hans Peter Freyther | 9c595b7 | 2010-06-15 11:20:52 +0800 | [diff] [blame] | 190 | if (conn->lchan->sapis[sapi] == LCHAN_SAPI_UNUSED) { |
| 191 | OBSC_LINKID_CB(msg) = link_id; |
| 192 | if (rll_establish(msg->lchan, sapi, rll_ind_cb, msg) != 0) { |
| 193 | msgb_free(msg); |
| 194 | send_sapi_reject(conn, link_id); |
| 195 | return -1; |
| 196 | } |
| 197 | return 0; |
| 198 | } else { |
| 199 | return rsl_data_request(msg, link_id); |
| 200 | } |
Holger Hans Peter Freyther | ec32b58 | 2010-03-23 07:40:46 +0100 | [diff] [blame] | 201 | } |
Holger Hans Peter Freyther | 2a9285c | 2010-06-14 18:03:06 +0800 | [diff] [blame] | 202 | |
Holger Hans Peter Freyther | c354de8 | 2010-07-23 16:49:38 +0800 | [diff] [blame] | 203 | /** |
| 204 | * Send a GSM08.08 Assignment Request. Right now this does not contain the |
Holger Hans Peter Freyther | 088dde8 | 2010-11-10 11:07:12 +0100 | [diff] [blame] | 205 | * audio codec type or the allowed rates for the config. It is assumed that |
| 206 | * this is for audio handling and that when we have a TCH it is capable of |
| 207 | * handling the audio codec. On top of that it is assumed that we are using |
| 208 | * AMR 5.9 when assigning a TCH/H. |
Holger Hans Peter Freyther | c354de8 | 2010-07-23 16:49:38 +0800 | [diff] [blame] | 209 | */ |
Holger Hans Peter Freyther | 2603c1f | 2010-11-10 10:01:20 +0100 | [diff] [blame] | 210 | int gsm0808_assign_req(struct gsm_subscriber_connection *conn, int chan_mode, int full_rate) |
Holger Hans Peter Freyther | c354de8 | 2010-07-23 16:49:38 +0800 | [diff] [blame] | 211 | { |
| 212 | struct bsc_api *api; |
| 213 | api = conn->bts->network->bsc_api; |
| 214 | |
Holger Hans Peter Freyther | 088dde8 | 2010-11-10 11:07:12 +0100 | [diff] [blame] | 215 | if (conn->lchan->type == GSM_LCHAN_SDCCH) { |
| 216 | api->assign_fail(conn, 0, NULL); |
| 217 | } else { |
| 218 | LOGP(DMSC, LOGL_NOTICE, |
| 219 | "Sending ChanModify for speech %d %d\n", chan_mode, full_rate); |
| 220 | if (chan_mode == GSM48_CMODE_SPEECH_AMR) { |
| 221 | conn->lchan->mr_conf.ver = 1; |
| 222 | conn->lchan->mr_conf.icmi = 1; |
| 223 | conn->lchan->mr_conf.m5_90 = 1; |
| 224 | } |
| 225 | |
| 226 | return gsm48_lchan_modify(conn->lchan, chan_mode); |
| 227 | } |
| 228 | |
Holger Hans Peter Freyther | c354de8 | 2010-07-23 16:49:38 +0800 | [diff] [blame] | 229 | return 0; |
| 230 | } |
| 231 | |
Holger Hans Peter Freyther | 7700846 | 2010-06-16 14:10:45 +0800 | [diff] [blame] | 232 | int gsm0808_page(struct gsm_bts *bts, unsigned int page_group, unsigned int mi_len, |
| 233 | uint8_t *mi, int chan_type) |
| 234 | { |
| 235 | return rsl_paging_cmd(bts, page_group, mi_len, mi, chan_type); |
| 236 | } |
| 237 | |
Holger Hans Peter Freyther | 2a9285c | 2010-06-14 18:03:06 +0800 | [diff] [blame] | 238 | /* dequeue messages to layer 4 */ |
| 239 | int bsc_upqueue(struct gsm_network *net) |
| 240 | { |
| 241 | struct gsm_mncc *mncc; |
| 242 | struct msgb *msg; |
| 243 | int work = 0; |
| 244 | |
| 245 | if (net) |
| 246 | while ((msg = msgb_dequeue(&net->upqueue))) { |
| 247 | mncc = (struct gsm_mncc *)msg->data; |
| 248 | if (net->mncc_recv) |
| 249 | net->mncc_recv(net, mncc->msg_type, mncc); |
| 250 | work = 1; /* work done */ |
| 251 | talloc_free(msg); |
| 252 | } |
| 253 | |
| 254 | return work; |
| 255 | } |
Holger Hans Peter Freyther | abcddf1 | 2010-06-14 18:20:15 +0800 | [diff] [blame] | 256 | |
Holger Hans Peter Freyther | 46caa30 | 2010-11-04 12:18:00 +0100 | [diff] [blame] | 257 | static void dispatch_dtap(struct gsm_subscriber_connection *conn, |
| 258 | uint8_t link_id, struct msgb *msg) |
Holger Hans Peter Freyther | 6c199e7 | 2010-11-04 11:18:03 +0100 | [diff] [blame] | 259 | { |
| 260 | struct bsc_api *api = msg->lchan->ts->trx->bts->network->bsc_api; |
| 261 | struct gsm48_hdr *gh; |
| 262 | uint8_t pdisc; |
| 263 | int rc; |
| 264 | |
| 265 | if (msgb_l3len(msg) < sizeof(*gh)) { |
| 266 | LOGP(DMSC, LOGL_ERROR, "Message too short for a GSM48 header.\n"); |
| 267 | return; |
| 268 | } |
| 269 | |
| 270 | gh = msgb_l3(msg); |
| 271 | pdisc = gh->proto_discr & 0x0f; |
| 272 | switch (pdisc) { |
| 273 | case GSM48_PDISC_RR: |
| 274 | switch (gh->msg_type) { |
| 275 | case GSM48_MT_RR_CIPH_M_COMPL: |
| 276 | if (api->cipher_mode_compl) |
| 277 | return api->cipher_mode_compl(conn, msg, |
| 278 | conn->lchan->encr.alg_id); |
| 279 | break; |
| 280 | case GSM48_MT_RR_ASS_COMPL: |
| 281 | LOGP(DMSC, LOGL_ERROR, "Assignment command is not handled.\n"); |
| 282 | break; |
| 283 | case GSM48_MT_RR_ASS_FAIL: |
| 284 | LOGP(DMSC, LOGL_ERROR, "Assignment failure is not handled.\n"); |
| 285 | break; |
| 286 | case GSM48_MT_RR_CHAN_MODE_MODIF_ACK: |
| 287 | rc = gsm48_rx_rr_modif_ack(msg); |
Holger Hans Peter Freyther | 45b575f | 2010-11-05 10:37:17 +0100 | [diff] [blame] | 288 | if (rc < 0 && api->assign_fail) { |
Holger Hans Peter Freyther | 6c199e7 | 2010-11-04 11:18:03 +0100 | [diff] [blame] | 289 | api->assign_fail(conn, |
Holger Hans Peter Freyther | 45b575f | 2010-11-05 10:37:17 +0100 | [diff] [blame] | 290 | GSM0808_CAUSE_NO_RADIO_RESOURCE_AVAILABLE, |
| 291 | NULL); |
| 292 | } else if (rc >= 0 && api->assign_compl) |
Holger Hans Peter Freyther | b094171 | 2010-11-04 12:06:57 +0100 | [diff] [blame] | 293 | api->assign_compl(conn, 0, |
| 294 | lchan_to_chosen_channel(conn->lchan), |
| 295 | conn->lchan->encr.alg_id, |
| 296 | chan_mode_to_speech(conn->lchan)); |
Holger Hans Peter Freyther | 6c199e7 | 2010-11-04 11:18:03 +0100 | [diff] [blame] | 297 | return; |
| 298 | break; |
| 299 | } |
| 300 | break; |
| 301 | case GSM48_PDISC_MM: |
| 302 | break; |
| 303 | } |
| 304 | |
| 305 | /* default case */ |
| 306 | if (api->dtap) |
Holger Hans Peter Freyther | 46caa30 | 2010-11-04 12:18:00 +0100 | [diff] [blame] | 307 | api->dtap(conn, link_id, msg); |
Holger Hans Peter Freyther | 6c199e7 | 2010-11-04 11:18:03 +0100 | [diff] [blame] | 308 | } |
| 309 | |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 310 | int gsm0408_rcvmsg(struct msgb *msg, uint8_t link_id) |
| 311 | { |
| 312 | int rc; |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 313 | struct bsc_api *api = msg->lchan->ts->trx->bts->network->bsc_api; |
Holger Hans Peter Freyther | 2412a07 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 314 | struct gsm_lchan *lchan; |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 315 | |
Holger Hans Peter Freyther | 2412a07 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 316 | lchan = msg->lchan; |
Holger Hans Peter Freyther | 49ab278 | 2010-07-05 11:38:37 +0800 | [diff] [blame] | 317 | if (lchan->state != LCHAN_S_ACTIVE) { |
| 318 | LOGP(DRSL, LOGL_ERROR, "Got data in non active state. discarding.\n"); |
| 319 | return -1; |
| 320 | } |
| 321 | |
| 322 | |
Holger Hans Peter Freyther | 2412a07 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 323 | if (lchan->conn) { |
Holger Hans Peter Freyther | 46caa30 | 2010-11-04 12:18:00 +0100 | [diff] [blame] | 324 | dispatch_dtap(lchan->conn, link_id, msg); |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 325 | } else { |
Holger Hans Peter Freyther | 2412a07 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 326 | rc = BSC_API_CONN_POL_REJECT; |
| 327 | lchan->conn = subscr_con_allocate(msg->lchan); |
| 328 | |
| 329 | if (lchan->conn) |
| 330 | rc = api->compl_l3(lchan->conn, msg, 0); |
| 331 | |
| 332 | if (rc != BSC_API_CONN_POL_ACCEPT) { |
Holger Hans Peter Freyther | 8d216c7 | 2010-11-15 10:33:59 +0100 | [diff] [blame] | 333 | lchan->conn->lchan = NULL; |
Holger Hans Peter Freyther | 2412a07 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 334 | subscr_con_free(lchan->conn); |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 335 | lchan_release(lchan, 0, 0); |
Holger Hans Peter Freyther | 2412a07 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 336 | } |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | return 0; |
| 340 | } |
| 341 | |
Holger Hans Peter Freyther | dbc62db | 2010-07-23 16:55:24 +0800 | [diff] [blame] | 342 | int gsm0808_cipher_mode(struct gsm_subscriber_connection *conn, int cipher, |
Holger Hans Peter Freyther | 2f169d6 | 2010-11-10 09:42:50 +0100 | [diff] [blame] | 343 | const uint8_t *key, int len, int include_imeisv) |
Holger Hans Peter Freyther | dbc62db | 2010-07-23 16:55:24 +0800 | [diff] [blame] | 344 | { |
Holger Hans Peter Freyther | 4be7d41 | 2010-11-10 10:25:34 +0100 | [diff] [blame] | 345 | if (cipher > 0 && key == NULL) { |
| 346 | LOGP(DRSL, LOGL_ERROR, "Need to have an encrytpion key.\n"); |
| 347 | return -1; |
| 348 | } |
| 349 | |
| 350 | if (len > MAX_A5_KEY_LEN) { |
| 351 | LOGP(DRSL, LOGL_ERROR, "The key is too long: %d\n", len); |
| 352 | return -1; |
| 353 | } |
| 354 | |
| 355 | conn->lchan->encr.alg_id = RSL_ENC_ALG_A5(cipher); |
| 356 | if (key) { |
| 357 | conn->lchan->encr.key_len = len; |
| 358 | memcpy(conn->lchan->encr.key, key, len); |
| 359 | } |
| 360 | |
| 361 | return gsm48_send_rr_ciph_mode(conn->lchan, include_imeisv); |
Holger Hans Peter Freyther | dbc62db | 2010-07-23 16:55:24 +0800 | [diff] [blame] | 362 | } |
| 363 | |
Holger Hans Peter Freyther | aaa40b8 | 2010-09-16 20:48:15 +0800 | [diff] [blame] | 364 | /* |
| 365 | * Release all occupied RF Channels but stay around for more. |
| 366 | */ |
Holger Hans Peter Freyther | adb6e1c | 2010-09-18 06:44:24 +0800 | [diff] [blame] | 367 | int gsm0808_clear(struct gsm_subscriber_connection *conn) |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 368 | { |
Holger Hans Peter Freyther | 1f69b46 | 2010-09-16 22:49:37 +0800 | [diff] [blame] | 369 | if (conn->ho_lchan) |
| 370 | bsc_clear_handover(conn); |
Holger Hans Peter Freyther | d065165 | 2010-06-30 12:17:35 +0800 | [diff] [blame] | 371 | |
Holger Hans Peter Freyther | abf962b | 2010-11-14 16:04:46 +0100 | [diff] [blame] | 372 | if (conn->lchan) |
Holger Hans Peter Freyther | 1f69b46 | 2010-09-16 22:49:37 +0800 | [diff] [blame] | 373 | lchan_release(conn->lchan, 1, 0); |
Holger Hans Peter Freyther | 1f69b46 | 2010-09-16 22:49:37 +0800 | [diff] [blame] | 374 | |
Holger Hans Peter Freyther | aaa40b8 | 2010-09-16 20:48:15 +0800 | [diff] [blame] | 375 | conn->lchan = NULL; |
| 376 | conn->ho_lchan = NULL; |
| 377 | conn->bts = NULL; |
| 378 | |
Holger Hans Peter Freyther | 4049455 | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 379 | return 0; |
| 380 | } |
| 381 | |
Holger Hans Peter Freyther | 9c595b7 | 2010-06-15 11:20:52 +0800 | [diff] [blame] | 382 | static void send_sapi_reject(struct gsm_subscriber_connection *conn, int link_id) |
| 383 | { |
| 384 | struct bsc_api *api; |
| 385 | |
Holger Hans Peter Freyther | 2412a07 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 386 | if (!conn) |
| 387 | return; |
| 388 | |
Holger Hans Peter Freyther | 9c595b7 | 2010-06-15 11:20:52 +0800 | [diff] [blame] | 389 | api = conn->bts->network->bsc_api; |
| 390 | if (!api || !api->sapi_n_reject) |
| 391 | return; |
| 392 | |
| 393 | api->sapi_n_reject(conn, link_id); |
| 394 | } |
| 395 | |
| 396 | static void rll_ind_cb(struct gsm_lchan *lchan, uint8_t link_id, void *_data, enum bsc_rllr_ind rllr_ind) |
| 397 | { |
| 398 | struct msgb *msg = _data; |
| 399 | |
Holger Hans Peter Freyther | 7e50c81 | 2010-11-10 10:59:05 +0100 | [diff] [blame] | 400 | /* |
| 401 | * There seems to be a small window that the RLL timer can |
| 402 | * fire after a lchan_release call and before the S_CHALLOC_FREED |
| 403 | * is called. Check if a conn is set before proceeding. |
| 404 | */ |
| 405 | if (!lchan->conn) |
| 406 | return; |
| 407 | |
Holger Hans Peter Freyther | 9c595b7 | 2010-06-15 11:20:52 +0800 | [diff] [blame] | 408 | switch (rllr_ind) { |
| 409 | case BSC_RLLR_IND_EST_CONF: |
| 410 | rsl_data_request(msg, OBSC_LINKID_CB(msg)); |
| 411 | break; |
| 412 | case BSC_RLLR_IND_REL_IND: |
| 413 | case BSC_RLLR_IND_ERR_IND: |
| 414 | case BSC_RLLR_IND_TIMEOUT: |
Holger Hans Peter Freyther | 2412a07 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 415 | send_sapi_reject(lchan->conn, OBSC_LINKID_CB(msg)); |
Holger Hans Peter Freyther | 9c595b7 | 2010-06-15 11:20:52 +0800 | [diff] [blame] | 416 | msgb_free(msg); |
| 417 | break; |
| 418 | } |
| 419 | } |
| 420 | |
Holger Hans Peter Freyther | abcddf1 | 2010-06-14 18:20:15 +0800 | [diff] [blame] | 421 | static int bsc_handle_lchan_signal(unsigned int subsys, unsigned int signal, |
| 422 | void *handler_data, void *signal_data) |
| 423 | { |
| 424 | struct bsc_api *bsc; |
| 425 | struct gsm_lchan *lchan; |
| 426 | |
Holger Hans Peter Freyther | f05750c | 2010-11-14 19:29:42 +0100 | [diff] [blame^] | 427 | if (subsys != SS_LCHAN) |
Holger Hans Peter Freyther | abcddf1 | 2010-06-14 18:20:15 +0800 | [diff] [blame] | 428 | return 0; |
| 429 | |
| 430 | lchan = (struct gsm_lchan *)signal_data; |
Holger Hans Peter Freyther | 2412a07 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 431 | if (!lchan || !lchan->conn) |
Holger Hans Peter Freyther | abcddf1 | 2010-06-14 18:20:15 +0800 | [diff] [blame] | 432 | return 0; |
| 433 | |
Holger Hans Peter Freyther | abcddf1 | 2010-06-14 18:20:15 +0800 | [diff] [blame] | 434 | bsc = lchan->ts->trx->bts->network->bsc_api; |
Holger Hans Peter Freyther | aaa40b8 | 2010-09-16 20:48:15 +0800 | [diff] [blame] | 435 | if (!bsc) |
Holger Hans Peter Freyther | abcddf1 | 2010-06-14 18:20:15 +0800 | [diff] [blame] | 436 | return 0; |
| 437 | |
Holger Hans Peter Freyther | f05750c | 2010-11-14 19:29:42 +0100 | [diff] [blame^] | 438 | switch (signal) { |
| 439 | case S_LCHAN_UNEXPECTED_RELEASE: |
| 440 | handle_release(lchan->conn, bsc, lchan); |
| 441 | break; |
| 442 | } |
| 443 | |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | static void handle_release(struct gsm_subscriber_connection *conn, |
| 448 | struct bsc_api *bsc, struct gsm_lchan *lchan) |
| 449 | { |
| 450 | int destruct = 1; |
| 451 | |
Holger Hans Peter Freyther | aaa40b8 | 2010-09-16 20:48:15 +0800 | [diff] [blame] | 452 | if (bsc->clear_request) |
Holger Hans Peter Freyther | 05c6884 | 2010-11-03 19:01:58 +0100 | [diff] [blame] | 453 | destruct = bsc->clear_request(conn, 0); |
Holger Hans Peter Freyther | aaa40b8 | 2010-09-16 20:48:15 +0800 | [diff] [blame] | 454 | |
| 455 | /* now give up all channels */ |
| 456 | if (conn->lchan == lchan) |
| 457 | conn->lchan = NULL; |
| 458 | if (conn->ho_lchan == lchan) |
| 459 | conn->ho_lchan = NULL; |
Holger Hans Peter Freyther | a2e5cb8 | 2010-11-15 09:59:58 +0100 | [diff] [blame] | 460 | lchan->conn = NULL; |
| 461 | |
Holger Hans Peter Freyther | aaa40b8 | 2010-09-16 20:48:15 +0800 | [diff] [blame] | 462 | gsm0808_clear(conn); |
| 463 | |
Holger Hans Peter Freyther | 05c6884 | 2010-11-03 19:01:58 +0100 | [diff] [blame] | 464 | if (destruct) |
| 465 | subscr_con_free(conn); |
Holger Hans Peter Freyther | abcddf1 | 2010-06-14 18:20:15 +0800 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | static __attribute__((constructor)) void on_dso_load_bsc(void) |
| 469 | { |
| 470 | register_signal_handler(SS_LCHAN, bsc_handle_lchan_signal, NULL); |
Holger Hans Peter Freyther | 0cfbe26 | 2010-06-15 11:20:24 +0800 | [diff] [blame] | 471 | } |