src/host/layer23/src/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 #include <time.h>
  28
  29 #include <osmocom/osmocom_data.h>
  30 #include <osmocom/l1ctl.h>
  31 #include <osmocom/l23_app.h>
  32 #include <osmocom/gsm48_rr.h>
  33 #include <osmocom/sysinfo.h>
  34 #include <osmocom/lapdm.h>
  35 #include <osmocom/gsmtap_util.h>
  36 #include <osmocom/logging.h>
  37 #include <osmocom/telnet_interface.h>
  38 #include <osmocom/file.h>
  39
  40 #include <osmocore/msgb.h>
  41 #include <osmocore/talloc.h>
  42 #include <osmocore/select.h>
  43 #include <osmocore/signal.h>
  44
  45 extern struct log_target *stderr_target;
  46 static const char *config_file = "osmocom.cfg";
  47
  48 static int started = 0;
  49
  50 int mncc_recv_dummy(struct osmocom_ms *ms, int msg_type, void *arg);
  51
  52 int mobile_work(struct osmocom_ms *ms)
  53 {
  54         int work = 0, w;
  55
  56         do {
  57                 w = 0;
  58                 w |= gsm48_rsl_dequeue(ms);
  59                 w |= gsm48_rr_dequeue(ms);
  60                 w |= gsm48_mmxx_dequeue(ms);
  61                 w |= gsm48_mmr_dequeue(ms);
  62                 w |= gsm48_mmevent_dequeue(ms);
  63                 w |= gsm322_plmn_dequeue(ms);
  64                 w |= gsm322_cs_dequeue(ms);
  65                 w |= mncc_dequeue(ms);
  66                 if (w)
  67                         work = 1;
  68         } while (w);
  69         return work;
  70 }
  71
  72 static int signal_cb(unsigned int subsys, unsigned int signal,
  73                      void *handler_data, void *signal_data)
  74 {
  75         struct osmocom_ms *ms;
  76         struct msgb *nmsg;
  77
  78         if (subsys != SS_L1CTL)
  79                 return 0;
  80
  81         switch (signal) {
  82         case S_L1CTL_RESET:
  83                 if (started) {
  84                         printf("L1_RESET, TODO: resend last radio request "
  85                                 "(CCCH / dedicated / power scan)\n");
  86                         break;
  87                 }
  88                 started = 1;
  89                 ms = signal_data;
  90                 /* insert test card, if enabled */
  91                 if (ms->settings.simtype == GSM_SIM_TYPE_TEST)
  92                         gsm_subscr_testcard(ms);
  93                 /* start PLMN + cell selection process */
  94                 nmsg = gsm322_msgb_alloc(GSM322_EVENT_SWITCH_ON);
  95                 if (!nmsg)
  96                         return -ENOMEM;
  97                 gsm322_plmn_sendmsg(ms, nmsg);
  98                 nmsg = gsm322_msgb_alloc(GSM322_EVENT_SWITCH_ON);
  99                 if (!nmsg)
 100                         return -ENOMEM;
 101                 gsm322_cs_sendmsg(ms, nmsg);
 102         }
 103         return 0;
 104 }
 105
 106 int mobile_exit(struct osmocom_ms *ms)
 107 {
 108         struct gsm48_mmlayer *mm = &ms->mmlayer;
 109
 110         if (!mm->power_off && started) {
 111                 struct msgb *nmsg;
 112
 113                 mm->power_off = 1;
 114                 nmsg = gsm48_mmevent_msgb_alloc(GSM48_MM_EVENT_IMSI_DETACH);
 115                 if (!nmsg)
 116                         return -ENOMEM;
 117                 gsm48_mmevent_msg(mm->ms, nmsg);
 118
 119                 return -EBUSY;
 120         }
 121
 122         /* in case there is a lockup during exit */
 123         signal(SIGINT, SIG_DFL);
 124         signal(SIGHUP, SIG_DFL);
 125         signal(SIGTERM, SIG_DFL);
 126         signal(SIGPIPE, SIG_DFL);
 127
 128         unregister_signal_handler(SS_L1CTL, &signal_cb, NULL);
 129         gsm322_exit(ms);
 130         gsm48_mm_exit(ms);
 131         gsm48_rr_exit(ms);
 132         gsm_subscr_exit(ms);
 133         gsm48_cc_exit(ms);
 134
 135         return 0;
 136 }
 137
 138 int l23_app_init(struct osmocom_ms *ms)
 139 {
 140         int rc;
 141
 142         log_parse_category_mask(stderr_target, "DRSL:DLAPDM:DCS:DPLMN:DRR:DMM:DCC:DMNCC:DPAG");
 143
 144         srand(time(NULL));
 145
 146         gsm_settings_init(ms);
 147         gsm48_cc_init(ms);
 148         gsm_support_init(ms);
 149         gsm_subscr_init(ms);
 150         gsm48_rr_init(ms);
 151         gsm48_mm_init(ms);
 152         INIT_LLIST_HEAD(&ms->trans_list);
 153         ms->cclayer.mncc_recv = mncc_recv_dummy;
 154         gsm322_init(ms);
 155
 156         l23_app_work = mobile_work;
 157         register_signal_handler(SS_L1CTL, &signal_cb, NULL);
 158         l23_app_exit = mobile_exit;
 159
 160         telnet_init(ms, 4242);
 161         rc = vty_read_config_file(config_file);
 162         if (rc < 0) {
 163                 fprintf(stderr, "Failed to parse the config file: '%s'\n",
 164                         config_file);
 165                 fprintf(stderr, "Please check or create config file using: "
 166                         "'touch %s%s'\n", OSMOCOM_CONFDIR, config_file);
 167                 return rc;
 168         }
 169
 170         gsm_random_imei(&ms->settings);
 171
 172         return 0;
 173 }
 174