src/host/layer23/src/mobile/app_mobile.c

   1 /* "Application" code of the layer2/3 stack */
   2
   3 /* (C) 2010 by Holger Hans Peter Freyther
   4  * (C) 2010 by Harald Welte <laforge@gnumonks.org>
   5  * (C) 2010 by Andreas Eversberg <jolly@eversberg.eu>
   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 <errno.h>
  26 #include <signal.h>
  27
  28 #include <osmocom/bb/common/osmocom_data.h>
  29 #include <osmocom/bb/common/l1l2_interface.h>
  30 #include <osmocom/bb/common/l1ctl.h>
  31 #include <osmocom/bb/common/lapdm.h>
  32 #include <osmocom/bb/common/logging.h>
  33 #include <osmocom/bb/common/gps.h>
  34 #include <osmocom/bb/mobile/gsm48_rr.h>
  35 #include <osmocom/bb/mobile/vty.h>
  36 #include <osmocom/bb/mobile/app_mobile.h>
  37 #include <osmocom/bb/mobile/mncc.h>
  38 #include <osmocom/vty/telnet_interface.h>
  39
  40 #include <osmocom/core/msgb.h>
  41 #include <osmocom/core/talloc.h>
  42 #include <osmocom/core/select.h>
  43 #include <osmocom/core/signal.h>
  44
  45 extern void *l23_ctx;
  46 extern struct llist_head ms_list;
  47 extern int vty_reading;
  48
  49 int mncc_recv_mobile(struct osmocom_ms *ms, int msg_type, void *arg);
  50 int mncc_recv_dummy(struct osmocom_ms *ms, int msg_type, void *arg);
  51 int (*mncc_recv_app)(struct osmocom_ms *ms, int, void *);
  52 static int quit;
  53
  54 /* handle ms instance */
  55 int mobile_work(struct osmocom_ms *ms)
  56 {
  57         int work = 0, w;
  58
  59         do {
  60                 w = 0;
  61                 w |= gsm48_rsl_dequeue(ms);
  62                 w |= gsm48_rr_dequeue(ms);
  63                 w |= gsm48_mmxx_dequeue(ms);
  64                 w |= gsm48_mmr_dequeue(ms);
  65                 w |= gsm48_mmevent_dequeue(ms);
  66                 w |= gsm322_plmn_dequeue(ms);
  67                 w |= gsm322_cs_dequeue(ms);
  68                 w |= gsm_sim_job_dequeue(ms);
  69                 w |= mncc_dequeue(ms);
  70                 if (w)
  71                         work = 1;
  72         } while (w);
  73         return work;
  74 }
  75
  76 /* run ms instance, if layer1 is available */
  77 int mobile_signal_cb(unsigned int subsys, unsigned int signal,
  78                      void *handler_data, void *signal_data)
  79 {
  80         struct osmocom_ms *ms;
  81         struct gsm_settings *set;
  82         struct msgb *nmsg;
  83
  84         if (subsys != SS_L1CTL)
  85                 return 0;
  86
  87         switch (signal) {
  88         case S_L1CTL_RESET:
  89                 ms = signal_data;
  90                 set = &ms->settings;
  91
  92                 if (ms->started)
  93                         break;
  94
  95                 /* insert test card, if enabled */
  96                 switch (set->sim_type) {
  97                 case GSM_SIM_TYPE_READER:
  98                         /* trigger sim card reader process */
  99                         gsm_subscr_simcard(ms);
 100                         break;
 101                 case GSM_SIM_TYPE_TEST:
 102                         gsm_subscr_testcard(ms, set->test_rplmn_mcc,
 103                                 set->test_rplmn_mnc, set->test_lac,
 104                                 set->test_tmsi);
 105                         break;
 106                 default:
 107                         /* no SIM, trigger PLMN selection process */
 108                         nmsg = gsm322_msgb_alloc(GSM322_EVENT_SWITCH_ON);
 109                         if (!nmsg)
 110                                 return -ENOMEM;
 111                         gsm322_plmn_sendmsg(ms, nmsg);
 112                         nmsg = gsm322_msgb_alloc(GSM322_EVENT_SWITCH_ON);
 113                         if (!nmsg)
 114                                 return -ENOMEM;
 115                         gsm322_cs_sendmsg(ms, nmsg);
 116                 }
 117
 118                 ms->started = 1;
 119         }
 120         return 0;
 121 }
 122
 123 /* power-off ms instance */
 124 int mobile_exit(struct osmocom_ms *ms, int force)
 125 {
 126         struct gsm48_mmlayer *mm = &ms->mmlayer;
 127
 128         if (!force && ms->started) {
 129                 struct msgb *nmsg;
 130
 131                 ms->shutdown = 1; /* going down */
 132                 nmsg = gsm48_mmevent_msgb_alloc(GSM48_MM_EVENT_IMSI_DETACH);
 133                 if (!nmsg)
 134                         return -ENOMEM;
 135                 gsm48_mmevent_msg(mm->ms, nmsg);
 136
 137                 return -EBUSY;
 138         }
 139
 140         gsm322_exit(ms);
 141         gsm48_mm_exit(ms);
 142         gsm48_rr_exit(ms);
 143         gsm_subscr_exit(ms);
 144         gsm48_cc_exit(ms);
 145         gsm_sim_exit(ms);
 146         lapdm_exit(&ms->l2_entity.lapdm_acch);
 147         lapdm_exit(&ms->l2_entity.lapdm_dcch);
 148
 149         ms->shutdown = 2; /* being down */
 150         vty_notify(ms, NULL);
 151         vty_notify(ms, "Power off!\n");
 152         printf("Power off! (MS %s)\n", ms->name);
 153
 154         return 0;
 155 }
 156
 157 /* power-on ms instance */
 158 int mobile_init(struct osmocom_ms *ms)
 159 {
 160         int rc;
 161
 162         gsm_settings_arfcn(ms);
 163         lapdm_init(&ms->l2_entity.lapdm_dcch, ms);
 164         lapdm_init(&ms->l2_entity.lapdm_acch, ms);
 165         gsm_sim_init(ms);
 166         gsm48_cc_init(ms);
 167         gsm_subscr_init(ms);
 168         gsm48_rr_init(ms);
 169         gsm48_mm_init(ms);
 170         INIT_LLIST_HEAD(&ms->trans_list);
 171         gsm322_init(ms);
 172
 173         rc = layer2_open(ms, ms->settings.layer2_socket_path);
 174         if (rc < 0) {
 175                 fprintf(stderr, "Failed during layer2_open()\n");
 176                 ms->l2_wq.bfd.fd = -1;
 177                 mobile_exit(ms, 1);
 178                 return rc;
 179         }
 180
 181 #if 0
 182         rc = sap_open(ms, ms->settings.sap_socket_path);
 183         if (rc < 0) {
 184                 fprintf(stderr, "Failed during sap_open(), no SIM reader\n");
 185                 ms->sap_wq.bfd.fd = -1;
 186                 mobile_exit(ms, 1);
 187                 return rc;
 188         }
 189 #endif
 190
 191         if (mncc_recv_app)
 192                 ms->cclayer.mncc_recv = mncc_recv_app;
 193         else if (ms->settings.ch_cap == GSM_CAP_SDCCH)
 194                 ms->cclayer.mncc_recv = mncc_recv_dummy;
 195         else
 196                 ms->cclayer.mncc_recv = mncc_recv_mobile;
 197
 198         gsm_random_imei(&ms->settings);
 199
 200         ms->shutdown = 0;
 201         ms->started = 0;
 202
 203         l1ctl_tx_reset_req(ms, L1CTL_RES_T_FULL);
 204         printf("Mobile '%s' initialized, please start phone now!\n", ms->name);
 205         return 0;
 206 }
 207
 208 /* create ms instance */
 209 struct osmocom_ms *mobile_new(char *name)
 210 {
 211         static struct osmocom_ms *ms;
 212
 213         ms = talloc_zero(l23_ctx, struct osmocom_ms);
 214         if (!ms) {
 215                 fprintf(stderr, "Failed to allocate MS\n");
 216                 exit(1);
 217         }
 218         llist_add_tail(&ms->entity, &ms_list);
 219
 220         strcpy(ms->name, name);
 221
 222         ms->l2_wq.bfd.fd = -1;
 223         ms->sap_wq.bfd.fd = -1;
 224
 225         gsm_support_init(ms);
 226         gsm_settings_init(ms);
 227
 228         ms->shutdown = 2; /* being down */
 229
 230         if (mncc_recv_app) {
 231                 struct msgb *msg;
 232
 233                 msg = msgb_alloc(sizeof(struct gsm_mncc), "MNCC");
 234                 if (msg) {
 235                         struct gsm_mncc *mncc = (struct gsm_mncc *)msg->data;
 236
 237                         mncc->msg_type = MS_NEW;
 238                         mncc_recv_app(ms, mncc->msg_type, mncc);
 239                 }
 240                 ms->cclayer.mncc_recv = mncc_recv_app;
 241         } else
 242                 ms->cclayer.mncc_recv = mncc_recv_dummy;
 243
 244         return ms;
 245 }
 246
 247 /* destroy ms instance */
 248 int mobile_delete(struct osmocom_ms *ms, int force)
 249 {
 250         int rc;
 251
 252         ms->deleting = 1;
 253
 254         if (ms->shutdown == 0 || (ms->shutdown == 1 && force)) {
 255                 rc = mobile_exit(ms, force);
 256                 if (rc < 0)
 257                         return rc;
 258         }
 259
 260         if (mncc_recv_app) {
 261                 struct msgb *msg;
 262
 263                 msg = msgb_alloc(sizeof(struct gsm_mncc), "MNCC");
 264                 if (msg) {
 265                         struct gsm_mncc *mncc = (struct gsm_mncc *)msg->data;
 266
 267                         mncc->msg_type = MS_DELETE;
 268                         mncc_recv_app(ms, mncc->msg_type, mncc);
 269                 }
 270         }
 271
 272         return 0;
 273 }
 274
 275 /* handle global shutdown */
 276 int global_signal_cb(unsigned int subsys, unsigned int signal,
 277                      void *handler_data, void *signal_data)
 278 {
 279         struct osmocom_ms *ms, *ms2;
 280
 281         if (subsys != SS_GLOBAL)
 282                 return 0;
 283
 284         switch (signal) {
 285         case S_GLOBAL_SHUTDOWN:
 286                 llist_for_each_entry_safe(ms, ms2, &ms_list, entity)
 287                         mobile_delete(ms, quit);
 288
 289                 /* if second signal is received, force to exit */
 290                 quit = 1;
 291                 break;
 292         }
 293         return 0;
 294 }
 295
 296 /* global work handler */
 297 int l23_app_work(int *_quit)
 298 {
 299         struct osmocom_ms *ms, *ms2;
 300         int work = 0;
 301
 302         llist_for_each_entry_safe(ms, ms2, &ms_list, entity) {
 303                 if (ms->shutdown != 2)
 304                         work |= mobile_work(ms);
 305                 if (ms->shutdown == 2) {
 306                         if (ms->l2_wq.bfd.fd > -1) {
 307                                 layer2_close(ms);
 308                                 ms->l2_wq.bfd.fd = -1;
 309                         }
 310
 311                         if (ms->sap_wq.bfd.fd > -1) {
 312                                 sap_close(ms);
 313                                 ms->sap_wq.bfd.fd = -1;
 314                         }
 315
 316                         if (ms->deleting) {
 317                                 gsm_settings_exit(ms);
 318                                 llist_del(&ms->entity);
 319                                 talloc_free(ms);
 320                                 work = 1;
 321                         }
 322                 }
 323         }
 324
 325         /* return, if a shutdown was scheduled (quit = 1) */
 326         *_quit = quit;
 327         return work;
 328 }
 329
 330 /* global exit */
 331 int l23_app_exit(void)
 332 {
 333         osmo_signal_unregister_handler(SS_L1CTL, &gsm322_l1_signal, NULL);
 334         osmo_signal_unregister_handler(SS_L1CTL, &mobile_signal_cb, NULL);
 335         osmo_signal_unregister_handler(SS_GLOBAL, &global_signal_cb, NULL);
 336
 337         osmo_gps_close();
 338
 339         return 0;
 340 }
 341
 342 static struct vty_app_info vty_info = {
 343         .name = "OsmocomBB",
 344         .version = PACKAGE_VERSION,
 345         .go_parent_cb = ms_vty_go_parent,
 346 };
 347
 348 /* global init */
 349 int l23_app_init(int (*mncc_recv)(struct osmocom_ms *ms, int, void *),
 350         const char *config_file, uint16_t vty_port)
 351 {
 352         struct telnet_connection dummy_conn;
 353         int rc = 0;
 354
 355         mncc_recv_app = mncc_recv;
 356
 357         osmo_gps_init();
 358
 359         vty_init(&vty_info);
 360         ms_vty_init();
 361         dummy_conn.priv = NULL;
 362         vty_reading = 1;
 363         if (config_file != NULL) {
 364                 rc = vty_read_config_file(config_file, &dummy_conn);
 365                 if (rc < 0) {
 366                         fprintf(stderr, "Failed to parse the config file:"
 367                                         " '%s'\n", config_file);
 368                         fprintf(stderr, "Please check or create config file"
 369                                         " using: 'touch %s'\n", config_file);
 370                         return rc;
 371                 }
 372         }
 373         vty_reading = 0;
 374         telnet_init(l23_ctx, NULL, vty_port);
 375         if (rc < 0)
 376                 return rc;
 377         printf("VTY available on port %u.\n", vty_port);
 378
 379         osmo_signal_register_handler(SS_GLOBAL, &global_signal_cb, NULL);
 380         osmo_signal_register_handler(SS_L1CTL, &mobile_signal_cb, NULL);
 381         osmo_signal_register_handler(SS_L1CTL, &gsm322_l1_signal, NULL);
 382
 383         if (llist_empty(&ms_list)) {
 384                 struct osmocom_ms *ms;
 385
 386                 printf("No Mobile Station defined, creating: MS '1'\n");
 387                 ms = mobile_new("1");
 388                 if (ms)
 389                         mobile_init(ms);
 390         }
 391
 392         quit = 0;
 393
 394         return 0;
 395 }
 396