gsm.cpp

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** LCR                                                                       **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** mISDN gsm                                                                 **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 #include "main.h"
  13
  14 #ifndef _GNU_SOURCE
  15 #define _GNU_SOURCE
  16 #endif
  17 extern "C" {
  18 #include <getopt.h>
  19
  20 #include <openbsc/db.h>
  21 #include <openbsc/select.h>
  22 #include <openbsc/debug.h>
  23 #include <openbsc/e1_input.h>
  24 #include <openbsc/talloc.h>
  25 #include <openbsc/mncc.h>
  26 #include <openbsc/trau_frame.h>
  27 struct gsm_network *bsc_gsmnet = 0;
  28 extern int ipacc_rtp_direct;
  29 extern int bsc_bootstrap_network(int (*mmc_rev)(struct gsm_network *, int, void *),
  30                                  const char *cfg_file);
  31 extern int bsc_shutdown_net(struct gsm_network *net);
  32 void talloc_ctx_init(void);
  33 void on_dso_load_token(void);
  34 void on_dso_load_rrlp(void);
  35 static struct debug_target *stderr_target;
  36
  37 #include "gsm_audio.h"
  38
  39 #undef AF_ISDN
  40 #undef PF_ISDN
  41 extern  int     AF_ISDN;
  42 #define PF_ISDN AF_ISDN
  43 }
  44
  45
  46 struct lcr_gsm *gsm = NULL;
  47
  48 static unsigned int new_callref = 1;
  49
  50
  51 /*
  52  * create and send mncc message
  53  */
  54 static struct gsm_mncc *create_mncc(int msg_type, unsigned int callref)
  55 {
  56         struct gsm_mncc *mncc;
  57
  58         mncc = (struct gsm_mncc *)MALLOC(sizeof(struct gsm_mncc));
  59         mncc->msg_type = msg_type;
  60         mncc->callref = callref;
  61         return (mncc);
  62 }
  63 static int send_and_free_mncc(struct gsm_network *net, unsigned int msg_type, void *data)
  64 {
  65         int ret;
  66
  67         ret = mncc_send(net, msg_type, data);
  68         free(data);
  69
  70         return ret;
  71 }
  72
  73
  74 /*
  75  * constructor
  76  */
  77 Pgsm::Pgsm(int type, struct mISDNport *mISDNport, char *portname, struct port_settings *settings, int channel, int exclusive, int mode) : PmISDN(type, mISDNport, portname, settings, channel, exclusive, mode)
  78 {
  79         p_callerinfo.itype = (mISDNport->ifport->interface->extension)?INFO_ITYPE_ISDN_EXTENSION:INFO_ITYPE_ISDN;
  80         p_m_g_callref = 0;
  81         p_m_g_mode = 0;
  82         p_m_g_gsm_b_sock = -1;
  83         p_m_g_gsm_b_index = -1;
  84         p_m_g_gsm_b_active = 0;
  85         p_m_g_notify_pending = NULL;
  86         p_m_g_decoder = gsm_audio_create();
  87         p_m_g_encoder = gsm_audio_create();
  88         if (!p_m_g_encoder || !p_m_g_decoder) {
  89                 PERROR("Failed to create GSM audio codec instance\n");
  90                 p_m_delete = 1;
  91         }
  92         p_m_g_rxpos = 0;
  93         p_m_g_tch_connected = 0;
  94
  95         PDEBUG(DEBUG_GSM, "Created new mISDNPort(%s).\n", portname);
  96 }
  97
  98 /*
  99  * destructor
 100  */
 101 Pgsm::~Pgsm()
 102 {
 103         PDEBUG(DEBUG_GSM, "Destroyed GSM process(%s).\n", p_name);
 104
 105         /* remove queued message */
 106         if (p_m_g_notify_pending)
 107                 message_free(p_m_g_notify_pending);
 108
 109         /* close audio transfer socket */
 110         if (p_m_g_gsm_b_sock > -1)
 111                 bchannel_close();
 112
 113         /* close codec */
 114         if (p_m_g_encoder)
 115                 gsm_audio_destroy(p_m_g_encoder);
 116         if (p_m_g_decoder)
 117                 gsm_audio_destroy(p_m_g_decoder);
 118 }
 119
 120
 121 /* close bsc side bchannel */
 122 void Pgsm::bchannel_close(void)
 123 {
 124         if (p_m_g_gsm_b_sock > -1)
 125                 close(p_m_g_gsm_b_sock);
 126         p_m_g_gsm_b_sock = -1;
 127         p_m_g_gsm_b_index = -1;
 128         p_m_g_gsm_b_active = 0;
 129 }
 130
 131 /* open bsc side bchannel */
 132 int Pgsm::bchannel_open(int index)
 133 {
 134         int ret;
 135         unsigned int on = 1;
 136         struct sockaddr_mISDN addr;
 137         struct mISDNhead act;
 138
 139         if (p_m_g_gsm_b_sock > -1) {
 140                 PERROR("Socket already created for index %d\n", index);
 141                 return(-EIO);
 142         }
 143
 144         /* open socket */
 145         ret = p_m_g_gsm_b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_RAW);
 146         if (ret < 0) {
 147                 PERROR("Failed to open bchannel-socket for index %d\n", index);
 148                 bchannel_close();
 149                 return(ret);
 150         }
 151
 152         /* set nonblocking io */
 153         ret = ioctl(p_m_g_gsm_b_sock, FIONBIO, &on);
 154         if (ret < 0) {
 155                 PERROR("Failed to set bchannel-socket index %d into nonblocking IO\n", index);
 156                 bchannel_close();
 157                 return(ret);
 158         }
 159
 160         /* bind socket to bchannel */
 161         addr.family = AF_ISDN;
 162         addr.dev = gsm->gsm_port;
 163         addr.channel = index+1+(index>15);
 164         ret = bind(p_m_g_gsm_b_sock, (struct sockaddr *)&addr, sizeof(addr));
 165         if (ret < 0) {
 166                 PERROR("Failed to bind bchannel-socket for index %d\n", index);
 167                 bchannel_close();
 168                 return(ret);
 169         }
 170         /* activate bchannel */
 171         PDEBUG(DEBUG_GSM, "Activating GSM side channel index %i.\n", index);
 172         act.prim = PH_ACTIVATE_REQ;
 173         act.id = 0;
 174         ret = sendto(p_m_g_gsm_b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
 175         if (ret < 0) {
 176                 PERROR("Failed to activate index %d\n", index);
 177                 bchannel_close();
 178                 return(ret);
 179         }
 180
 181         p_m_g_gsm_b_index = index;
 182
 183         return(0);
 184 }
 185
 186 /* receive from bchannel */
 187 void Pgsm::bchannel_receive(struct mISDNhead *hh, unsigned char *data, int len)
 188 {
 189         unsigned char frame[33];
 190
 191         /* encoder init failed */
 192         if (!p_m_g_encoder)
 193                 return;
 194
 195         /* (currently) not connected, so don't flood tch! */
 196         if (!p_m_g_tch_connected)
 197                 return;
 198
 199         /* write to rx buffer */
 200         while(len--) {
 201                 p_m_g_rxdata[p_m_g_rxpos++] = audio_law_to_s32[*data++];
 202                 if (p_m_g_rxpos == 160) {
 203                         p_m_g_rxpos = 0;
 204
 205                         /* encode data */
 206                         gsm_audio_encode(p_m_g_encoder, p_m_g_rxdata, frame);
 207                         frame_send(frame);
 208                 }
 209         }
 210 }
 211
 212 /* transmit to bchannel */
 213 void Pgsm::bchannel_send(unsigned int prim, unsigned int id, unsigned char *data, int len)
 214 {
 215         unsigned char buf[MISDN_HEADER_LEN+len];
 216         struct mISDNhead *hh = (struct mISDNhead *)buf;
 217         int ret;
 218
 219         if (!p_m_g_gsm_b_active)
 220                 return;
 221
 222         /* make and send frame */
 223         hh->prim = PH_DATA_REQ;
 224         hh->id = 0;
 225         memcpy(buf+MISDN_HEADER_LEN, data, len);
 226         ret = sendto(p_m_g_gsm_b_sock, buf, MISDN_HEADER_LEN+len, 0, NULL, 0);
 227         if (ret <= 0)
 228                 PERROR("Failed to send to socket index %d\n", index);
 229 }
 230
 231 void Pgsm::frame_send(void *_frame)
 232 {
 233         unsigned char buffer[sizeof(struct gsm_data_frame) + 33];
 234         struct gsm_data_frame *frame = (struct gsm_data_frame *)buffer;
 235
 236         frame->msg_type = GSM_TCHF_FRAME;
 237         frame->callref = p_m_g_callref;
 238         memcpy(frame->data, _frame, 33);
 239         mncc_send((struct gsm_network *)gsm->network, frame->msg_type, frame);
 240 }
 241
 242
 243 void Pgsm::frame_receive(void *_frame)
 244 {
 245         struct gsm_data_frame *frame = (struct gsm_data_frame *)_frame;
 246         signed short samples[160];
 247         unsigned char data[160];
 248         int i;
 249
 250         if (!p_m_g_decoder)
 251                 return;
 252
 253         if ((frame->data[0]>>4) != 0xd)
 254                 PERROR("received GSM frame with wrong magig 0x%x\n", frame->data[0]>>4);
 255
 256         /* decode */
 257         gsm_audio_decode(p_m_g_decoder, frame->data, samples);
 258         for (i = 0; i < 160; i++) {
 259                 data[i] = audio_s16_to_law[samples[i] & 0xffff];
 260         }
 261
 262         /* send */
 263         bchannel_send(PH_DATA_REQ, 0, data, 160);
 264 }
 265
 266
 267 /*
 268  * create trace
 269  **/
 270 static void gsm_trace_header(struct mISDNport *mISDNport, class PmISDN *port, unsigned int msg_type, int direction)
 271 {
 272         char msgtext[64];
 273
 274         /* select message and primitive text */
 275         SCPY(msgtext, get_mncc_name(msg_type));
 276
 277         /* add direction */
 278         if (direction == DIRECTION_OUT)
 279                 SCAT(msgtext, " MSC->BSC");
 280         else
 281                 SCAT(msgtext, " MSC<-BSC");
 282
 283         /* init trace with given values */
 284         start_trace(mISDNport?mISDNport->portnum:-1,
 285                     mISDNport?(mISDNport->ifport?mISDNport->ifport->interface:NULL):NULL,
 286                     port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
 287                     port?port->p_dialinginfo.id:NULL,
 288                     direction,
 289                     CATEGORY_CH,
 290                     port?port->p_serial:0,
 291                     msgtext);
 292 }
 293
 294
 295
 296 /* select bchannel */
 297 int Pgsm::hunt_bchannel(void)
 298 {
 299         int channel;
 300         int i;
 301
 302         chan_trace_header(p_m_mISDNport, this, "CHANNEL SELECTION (setup)", DIRECTION_NONE);
 303         add_trace("channel", "reserved", "%d", p_m_mISDNport->b_reserved);
 304         if (p_m_mISDNport->b_reserved >= p_m_mISDNport->b_num) { // of out chan..
 305                 add_trace("conclusion", NULL, "all channels are reserved");
 306                 end_trace();
 307                 return(-34); // no channel
 308         }
 309         /* find channel */
 310         i = 0;
 311         channel = 0;
 312         while(i < p_m_mISDNport->b_num) {
 313                 if (p_m_mISDNport->b_port[i] == NULL) {
 314                         channel = i+1+(i>=15);
 315                         break;
 316                 }
 317                 i++;
 318         }
 319         if (!channel) {
 320                 add_trace("conclusion", NULL, "no channel available");
 321                 end_trace();
 322                 return(-6); // channel unacceptable
 323         }
 324         add_trace("conclusion", NULL, "channel available");
 325         add_trace("connect", "channel", "%d", channel);
 326         end_trace();
 327         return(channel);
 328 }
 329
 330
 331 /*
 332  * handles all indications
 333  */
 334 /* SETUP INDICATION */
 335 void Pgsm::setup_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 336 {
 337         int ret;
 338         class Endpoint *epoint;
 339         struct lcr_msg *message;
 340         int channel;
 341         struct gsm_mncc *mode, *proceeding, *frame;
 342
 343         /* emergency shutdown */
 344         printf("%d %d\n", mncc->emergency, !gsm->conf.noemergshut);
 345         if (mncc->emergency && !gsm->conf.noemergshut) {
 346                 start_trace(p_m_mISDNport->portnum,
 347                         p_m_mISDNport->ifport->interface,
 348                         NULL,
 349                         NULL,
 350                         DIRECTION_NONE,
 351                         CATEGORY_CH,
 352                         0,
 353                         "EMERGENCY SHUTDOWN (due to received emergency call)");
 354                 end_trace();
 355                 quit = 1;
 356         }
 357         /* process given callref */
 358         l1l2l3_trace_header(p_m_mISDNport, this, L3_NEW_L3ID_IND, DIRECTION_IN);
 359         add_trace("callref", "new", "0x%x", callref);
 360         if (p_m_g_callref) {
 361                 /* release in case the ID is already in use */
 362                 add_trace("error", NULL, "callref already in use");
 363                 end_trace();
 364                 mncc = create_mncc(MNCC_REJ_REQ, callref);
 365                 gsm_trace_header(p_m_mISDNport, this, MNCC_REJ_REQ, DIRECTION_OUT);
 366                 mncc->fields |= MNCC_F_CAUSE;
 367                 mncc->cause.coding = 3;
 368                 mncc->cause.location = 1;
 369                 mncc->cause.value = 47;
 370                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 371                 add_trace("cause", "location", "%d", mncc->cause.location);
 372                 add_trace("cause", "value", "%d", mncc->cause.value);
 373                 add_trace("reason", NULL, "callref already in use");
 374                 end_trace();
 375                 send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
 376                 new_state(PORT_STATE_RELEASE);
 377                 p_m_delete = 1;
 378                 return;
 379         }
 380         p_m_g_callref = callref;
 381         end_trace();
 382
 383         /* if blocked, release call with MT_RELEASE_COMPLETE */
 384         if (p_m_mISDNport->ifport->block) {
 385                 mncc = create_mncc(MNCC_REJ_REQ, p_m_g_callref);
 386                 gsm_trace_header(p_m_mISDNport, this, MNCC_REJ_REQ, DIRECTION_OUT);
 387                 mncc->fields |= MNCC_F_CAUSE;
 388                 mncc->cause.coding = 3;
 389                 mncc->cause.location = 1;
 390                 mncc->cause.value = 27;
 391                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 392                 add_trace("cause", "location", "%d", mncc->cause.location);
 393                 add_trace("cause", "value", "%d", mncc->cause.value);
 394                 add_trace("reason", NULL, "port is blocked");
 395                 end_trace();
 396                 send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
 397                 new_state(PORT_STATE_RELEASE);
 398                 p_m_delete = 1;
 399                 return;
 400         }
 401
 402         /* caller info */
 403         if (mncc->clir.inv)
 404                 p_callerinfo.present = INFO_PRESENT_RESTRICTED;
 405         else
 406                 p_callerinfo.present = INFO_PRESENT_ALLOWED;
 407         if (mncc->calling.number[0])
 408                 SCPY(p_callerinfo.id, mncc->calling.number);
 409         else
 410                 p_callerinfo.present = INFO_PRESENT_NOTAVAIL;
 411         SCPY(p_callerinfo.imsi, mncc->imsi);
 412         p_callerinfo.screen = INFO_SCREEN_NETWORK;
 413         p_callerinfo.ntype = INFO_NTYPE_UNKNOWN;
 414         p_callerinfo.isdn_port = p_m_portnum;
 415         SCPY(p_callerinfo.interface, p_m_mISDNport->ifport->interface->name);
 416
 417         /* dialing information */
 418         SCAT(p_dialinginfo.id, mncc->called.number);
 419         switch (mncc->called.type) {
 420                 case 0x1:
 421                 p_dialinginfo.ntype = INFO_NTYPE_INTERNATIONAL;
 422                 break;
 423                 case 0x2:
 424                 p_dialinginfo.ntype = INFO_NTYPE_NATIONAL;
 425                 break;
 426                 case 0x4:
 427                 p_dialinginfo.ntype = INFO_NTYPE_SUBSCRIBER;
 428                 break;
 429                 default:
 430                 p_dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
 431                 break;
 432         }
 433         if (mncc->emergency) {
 434                 SCPY(p_dialinginfo.id, "emergency");
 435         }
 436         p_dialinginfo.sending_complete = 1;
 437
 438         /* bearer capability */
 439         // todo
 440         p_capainfo.bearer_capa = INFO_BC_SPEECH;
 441         p_capainfo.bearer_info1 = (options.law=='a')?3:2;
 442         p_capainfo.bearer_mode = INFO_BMODE_CIRCUIT;
 443         p_capainfo.source_mode = B_MODE_TRANSPARENT;
 444         p_m_g_mode = p_capainfo.source_mode;
 445
 446         /* useruser */
 447
 448         /* hunt channel */
 449         ret = channel = hunt_bchannel();
 450         if (ret < 0)
 451                 goto no_channel;
 452
 453         /* open channel */
 454         ret = seize_bchannel(channel, 1);
 455         if (ret < 0) {
 456                 no_channel:
 457                 mncc = create_mncc(MNCC_REJ_REQ, p_m_g_callref);
 458                 gsm_trace_header(p_m_mISDNport, this, MNCC_REJ_REQ, DIRECTION_OUT);
 459                 mncc->fields |= MNCC_F_CAUSE;
 460                 mncc->cause.coding = 3;
 461                 mncc->cause.location = 1;
 462                 mncc->cause.value = 34;
 463                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 464                 add_trace("cause", "location", "%d", mncc->cause.location);
 465                 add_trace("cause", "value", "%d", mncc->cause.value);
 466                 add_trace("reason", NULL, "no channel");
 467                 end_trace();
 468                 send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
 469                 new_state(PORT_STATE_RELEASE);
 470                 p_m_delete = 1;
 471                 return;
 472         }
 473         bchannel_event(p_m_mISDNport, p_m_b_index, B_EVENT_USE);
 474         if (bchannel_open(p_m_b_index))
 475                 goto no_channel;
 476
 477         /* what infos did we got ... */
 478         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 479         if (p_callerinfo.id[0])
 480                 add_trace("calling", "number", "%s", p_callerinfo.id);
 481         else
 482                 SPRINT(p_callerinfo.id, "imsi-%s", p_callerinfo.imsi);
 483         add_trace("calling", "imsi", "%s", p_callerinfo.imsi);
 484         add_trace("dialing", "number", "%s", p_dialinginfo.id);
 485         end_trace();
 486
 487         /* create endpoint */
 488         if (p_epointlist)
 489                 FATAL("Incoming call but already got an endpoint.\n");
 490         if (!(epoint = new Endpoint(p_serial, 0)))
 491                 FATAL("No memory for Endpoint instance\n");
 492         if (!(epoint->ep_app = new DEFAULT_ENDPOINT_APP(epoint, 0))) //incoming
 493                 FATAL("No memory for Endpoint Application instance\n");
 494         epointlist_new(epoint->ep_serial);
 495
 496         /* modify lchan to GSM codec V1 */
 497         gsm_trace_header(p_m_mISDNport, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
 498         mode = create_mncc(MNCC_LCHAN_MODIFY, p_m_g_callref);
 499         mode->lchan_mode = 0x01; /* GSM V1 */
 500         add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
 501         end_trace();
 502         send_and_free_mncc((struct gsm_network *)gsm->network, mode->msg_type, mode);
 503
 504         /* send call proceeding */
 505         gsm_trace_header(p_m_mISDNport, this, MNCC_CALL_PROC_REQ, DIRECTION_OUT);
 506         proceeding = create_mncc(MNCC_CALL_PROC_REQ, p_m_g_callref);
 507         if (p_m_mISDNport->tones) {
 508                 proceeding->fields |= MNCC_F_PROGRESS;
 509                 proceeding->progress.coding = 3; /* GSM */
 510                 proceeding->progress.location = 1;
 511                 proceeding->progress.descr = 8;
 512                 add_trace("progress", "coding", "%d", proceeding->progress.coding);
 513                 add_trace("progress", "location", "%d", proceeding->progress.location);
 514                 add_trace("progress", "descr", "%d", proceeding->progress.descr);
 515         }
 516         end_trace();
 517         send_and_free_mncc((struct gsm_network *)gsm->network, proceeding->msg_type, proceeding);
 518
 519         new_state(PORT_STATE_IN_PROCEEDING);
 520
 521         if (p_m_mISDNport->tones && !p_m_g_tch_connected) { /* only if ... */
 522                 gsm_trace_header(p_m_mISDNport, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 523                 end_trace();
 524                 frame = create_mncc(MNCC_FRAME_RECV, p_m_g_callref);
 525                 send_and_free_mncc((struct gsm_network *)gsm->network, frame->msg_type, frame);
 526                 p_m_g_tch_connected = 1;
 527         }
 528
 529         /* send setup message to endpoit */
 530         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_SETUP);
 531         message->param.setup.isdn_port = p_m_portnum;
 532         message->param.setup.port_type = p_type;
 533 //      message->param.setup.dtmf = 0;
 534         memcpy(&message->param.setup.dialinginfo, &p_dialinginfo, sizeof(struct dialing_info));
 535         memcpy(&message->param.setup.callerinfo, &p_callerinfo, sizeof(struct caller_info));
 536         memcpy(&message->param.setup.capainfo, &p_capainfo, sizeof(struct capa_info));
 537         SCPY((char *)message->param.setup.useruser.data, (char *)mncc->useruser.info);
 538         message->param.setup.useruser.len = strlen(mncc->useruser.info);
 539         message->param.setup.useruser.protocol = mncc->useruser.proto;
 540         message_put(message);
 541 }
 542
 543 /* DTMF INDICATION */
 544 void Pgsm::start_dtmf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 545 {
 546         struct lcr_msg *message;
 547         struct gsm_mncc *resp;
 548
 549         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 550         add_trace("keypad", NULL, "%c", mncc->keypad);
 551         end_trace();
 552         SPRINT(p_dialinginfo.id, "%c", mncc->keypad);
 553         p_dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
 554
 555         /* send resp */
 556         gsm_trace_header(p_m_mISDNport, this, MNCC_START_DTMF_RSP, DIRECTION_OUT);
 557         add_trace("keypad", NULL, "%c", mncc->keypad);
 558         end_trace();
 559         resp = create_mncc(MNCC_START_DTMF_RSP, p_m_g_callref);
 560         resp->keypad = mncc->keypad;
 561         send_and_free_mncc((struct gsm_network *)gsm->network, resp->msg_type, resp);
 562
 563         /* send dialing information */
 564         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_INFORMATION);
 565         memcpy(&message->param.information, &p_dialinginfo, sizeof(struct dialing_info));
 566         message_put(message);
 567 }
 568 void Pgsm::stop_dtmf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 569 {
 570         struct gsm_mncc *resp;
 571
 572         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 573         add_trace("keypad", NULL, "%c", mncc->keypad);
 574         end_trace();
 575
 576         /* send resp */
 577         gsm_trace_header(p_m_mISDNport, this, MNCC_STOP_DTMF_RSP, DIRECTION_OUT);
 578         add_trace("keypad", NULL, "%c", mncc->keypad);
 579         end_trace();
 580         resp = create_mncc(MNCC_STOP_DTMF_RSP, p_m_g_callref);
 581         resp->keypad = mncc->keypad;
 582         send_and_free_mncc((struct gsm_network *)gsm->network, resp->msg_type, resp);
 583 }
 584
 585 /* PROCEEDING INDICATION */
 586 void Pgsm::call_conf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 587 {
 588         struct gsm_mncc *mode;
 589
 590         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 591         if (mncc->fields & MNCC_F_CAUSE) {
 592                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 593                 add_trace("cause", "location", "%", mncc->cause.location);
 594                 add_trace("cause", "value", "%", mncc->cause.value);
 595         }
 596         end_trace();
 597
 598         /* modify lchan to GSM codec V1 */
 599         gsm_trace_header(p_m_mISDNport, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
 600         mode = create_mncc(MNCC_LCHAN_MODIFY, p_m_g_callref);
 601         mode->lchan_mode = 0x01; /* GSM V1 */
 602         add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
 603         end_trace();
 604         send_and_free_mncc((struct gsm_network *)gsm->network, mode->msg_type, mode);
 605
 606 }
 607
 608 /* ALERTING INDICATION */
 609 void Pgsm::alert_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 610 {
 611         struct lcr_msg *message;
 612
 613         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 614         end_trace();
 615
 616         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_ALERTING);
 617         message_put(message);
 618
 619         new_state(PORT_STATE_OUT_ALERTING);
 620
 621 }
 622
 623 /* CONNECT INDICATION */
 624 void Pgsm::setup_cnf(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 625 {
 626         struct gsm_mncc *resp, *frame;
 627         struct lcr_msg *message;
 628
 629         SCPY(p_connectinfo.id, mncc->connected.number);
 630         SCPY(p_connectinfo.imsi, mncc->imsi);
 631         p_connectinfo.present = INFO_PRESENT_ALLOWED;
 632         p_connectinfo.screen = INFO_SCREEN_NETWORK;
 633         p_connectinfo.ntype = INFO_NTYPE_UNKNOWN;
 634         p_connectinfo.isdn_port = p_m_portnum;
 635         SCPY(p_connectinfo.interface, p_m_mISDNport->ifport->interface->name);
 636
 637         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 638         if (p_connectinfo.id[0])
 639                 add_trace("connect", "number", "%s", p_connectinfo.id);
 640         else if (mncc->imsi[0])
 641                 SPRINT(p_connectinfo.id, "imsi-%s", p_connectinfo.imsi);
 642         if (mncc->imsi[0])
 643                 add_trace("connect", "imsi", "%s", p_connectinfo.imsi);
 644         end_trace();
 645
 646         /* send resp */
 647         gsm_trace_header(p_m_mISDNport, this, MNCC_SETUP_COMPL_REQ, DIRECTION_OUT);
 648         resp = create_mncc(MNCC_SETUP_COMPL_REQ, p_m_g_callref);
 649         end_trace();
 650         send_and_free_mncc((struct gsm_network *)gsm->network, resp->msg_type, resp);
 651
 652         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
 653         memcpy(&message->param.connectinfo, &p_connectinfo, sizeof(struct connect_info));
 654         message_put(message);
 655
 656         new_state(PORT_STATE_CONNECT);
 657
 658         if (!p_m_g_tch_connected) { /* only if ... */
 659                 gsm_trace_header(p_m_mISDNport, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 660                 end_trace();
 661                 frame = create_mncc(MNCC_FRAME_RECV, p_m_g_callref);
 662                 send_and_free_mncc((struct gsm_network *)gsm->network, frame->msg_type, frame);
 663                 p_m_g_tch_connected = 1;
 664         }
 665 }
 666
 667 /* CONNECT ACK INDICATION */
 668 void Pgsm::setup_compl_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 669 {
 670         struct gsm_mncc *frame;
 671
 672         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 673         end_trace();
 674
 675         new_state(PORT_STATE_CONNECT);
 676
 677         if (!p_m_g_tch_connected) { /* only if ... */
 678                 gsm_trace_header(p_m_mISDNport, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 679                 end_trace();
 680                 frame = create_mncc(MNCC_FRAME_RECV, p_m_g_callref);
 681                 send_and_free_mncc((struct gsm_network *)gsm->network, frame->msg_type, frame);
 682                 p_m_g_tch_connected = 1;
 683         }
 684 }
 685
 686 /* DISCONNECT INDICATION */
 687 void Pgsm::disc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 688 {
 689         struct lcr_msg *message;
 690         int cause = 16, location = 0;
 691         struct gsm_mncc *resp;
 692
 693         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 694         if (mncc->fields & MNCC_F_CAUSE) {
 695                 location = mncc->cause.location;
 696                 cause = mncc->cause.value;
 697                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 698                 add_trace("cause", "location", "%d", location);
 699                 add_trace("cause", "value", "%d", cause);
 700         }
 701         end_trace();
 702
 703         /* send release */
 704         resp = create_mncc(MNCC_REL_REQ, p_m_g_callref);
 705         gsm_trace_header(p_m_mISDNport, this, MNCC_REL_REQ, DIRECTION_OUT);
 706 #if 0
 707         resp->fields |= MNCC_F_CAUSE;
 708         resp->cause.coding = 3;
 709         resp->cause.location = 1;
 710         resp->cause.value = cause;
 711         add_trace("cause", "coding", "%d", resp->cause.coding);
 712         add_trace("cause", "location", "%d", resp->cause.location);
 713         add_trace("cause", "value", "%d", resp->cause.value);
 714 #endif
 715         end_trace();
 716         send_and_free_mncc((struct gsm_network *)gsm->network, resp->msg_type, resp);
 717
 718         /* sending release to endpoint */
 719         while(p_epointlist) {
 720                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 721                 message->param.disconnectinfo.cause = cause;
 722                 message->param.disconnectinfo.location = location;
 723                 message_put(message);
 724                 /* remove epoint */
 725                 free_epointlist(p_epointlist);
 726         }
 727         new_state(PORT_STATE_RELEASE);
 728         p_m_delete = 1;
 729 }
 730
 731 /* CC_RELEASE INDICATION */
 732 void Pgsm::rel_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 733 {
 734         int location = 0, cause = 16;
 735         struct lcr_msg *message;
 736
 737         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 738         if (mncc->fields & MNCC_F_CAUSE) {
 739                 location = mncc->cause.location;
 740                 cause = mncc->cause.value;
 741                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 742                 add_trace("cause", "location", "%d", mncc->cause.location);
 743                 add_trace("cause", "value", "%d", mncc->cause.value);
 744         }
 745         end_trace();
 746
 747         /* sending release to endpoint */
 748         while(p_epointlist) {
 749                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 750                 message->param.disconnectinfo.cause = cause;
 751                 message->param.disconnectinfo.location = location;
 752                 message_put(message);
 753                 /* remove epoint */
 754                 free_epointlist(p_epointlist);
 755         }
 756         new_state(PORT_STATE_RELEASE);
 757         p_m_delete = 1;
 758 }
 759
 760 /* NOTIFY INDICATION */
 761 void Pgsm::notify_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 762 {
 763         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 764         end_trace();
 765 }
 766
 767
 768 /* HOLD INDICATION */
 769 void Pgsm::hold_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 770 {
 771         struct lcr_msg *message;
 772         struct gsm_mncc *resp, *frame;
 773
 774         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 775         end_trace();
 776
 777         /* notify the hold of call */
 778         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 779         message->param.notifyinfo.notify = INFO_NOTIFY_REMOTE_HOLD;
 780         message->param.notifyinfo.local = 1; /* call is held by supplementary service */
 781         message_put(message);
 782
 783         /* acknowledge hold */
 784         gsm_trace_header(p_m_mISDNport, this, MNCC_HOLD_CNF, DIRECTION_OUT);
 785         end_trace();
 786         resp = create_mncc(MNCC_HOLD_CNF, p_m_g_callref);
 787         send_and_free_mncc((struct gsm_network *)gsm->network, resp->msg_type, resp);
 788
 789         /* disable audio */
 790         if (p_m_g_tch_connected) { /* it should be true */
 791                 gsm_trace_header(p_m_mISDNport, this, MNCC_FRAME_DROP, DIRECTION_OUT);
 792                 end_trace();
 793                 frame = create_mncc(MNCC_FRAME_DROP, p_m_g_callref);
 794                 send_and_free_mncc((struct gsm_network *)gsm->network, frame->msg_type, frame);
 795                 p_m_g_tch_connected = 0;
 796         }
 797 }
 798
 799
 800 /* RETRIEVE INDICATION */
 801 void Pgsm::retr_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 802 {
 803         struct lcr_msg *message;
 804         struct gsm_mncc *resp, *frame;
 805
 806         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 807         end_trace();
 808
 809         /* notify the retrieve of call */
 810         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 811         message->param.notifyinfo.notify = INFO_NOTIFY_REMOTE_RETRIEVAL;
 812         message->param.notifyinfo.local = 1; /* call is retrieved by supplementary service */
 813         message_put(message);
 814
 815         /* acknowledge retr */
 816         gsm_trace_header(p_m_mISDNport, this, MNCC_RETRIEVE_CNF, DIRECTION_OUT);
 817         end_trace();
 818         resp = create_mncc(MNCC_RETRIEVE_CNF, p_m_g_callref);
 819         send_and_free_mncc((struct gsm_network *)gsm->network, resp->msg_type, resp);
 820
 821         /* enable audio */
 822         if (!p_m_g_tch_connected) { /* it should be true */
 823                 gsm_trace_header(p_m_mISDNport, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 824                 end_trace();
 825                 frame = create_mncc(MNCC_FRAME_RECV, p_m_g_callref);
 826                 send_and_free_mncc((struct gsm_network *)gsm->network, frame->msg_type, frame);
 827                 p_m_g_tch_connected = 1;
 828         }
 829 }
 830
 831 /*
 832  * BSC sends message to port
 833  */
 834 static int message_bsc(struct gsm_network *net, int msg_type, void *arg)
 835 {
 836         struct gsm_mncc *mncc = (struct gsm_mncc *)arg;
 837         unsigned int callref = mncc->callref;
 838         class Port *port;
 839         class Pgsm *pgsm = NULL;
 840         char name[64];
 841         struct mISDNport *mISDNport;
 842
 843         /* Special messages */
 844         switch(msg_type) {
 845         }
 846
 847         /* find callref */
 848         callref = mncc->callref;
 849         port = port_first;
 850         while(port) {
 851                 if ((port->p_type & PORT_CLASS_mISDN_MASK) == PORT_CLASS_mISDN_GSM) {
 852                         pgsm = (class Pgsm *)port;
 853                         if (pgsm->p_m_g_callref == callref) {
 854                                 break;
 855                         }
 856                 }
 857                 port = port->next;
 858         }
 859
 860         if (msg_type == GSM_TCHF_FRAME) {
 861                 if (port)
 862                         pgsm->frame_receive((struct gsm_trau_frame *)arg);
 863                 return 0;
 864         }
 865
 866         if (!port) {
 867                 if (msg_type != MNCC_SETUP_IND)
 868                         return(0);
 869                 /* find gsm port */
 870                 mISDNport = mISDNport_first;
 871                 while(mISDNport) {
 872                         if (mISDNport->gsm)
 873                                 break;
 874                         mISDNport = mISDNport->next;
 875                 }
 876                 if (!mISDNport) {
 877                         struct gsm_mncc *rej;
 878
 879                         rej = create_mncc(MNCC_REJ_REQ, callref);
 880                         rej->fields |= MNCC_F_CAUSE;
 881                         rej->cause.coding = 3;
 882                         rej->cause.location = 1;
 883                         rej->cause.value = 27;
 884                         gsm_trace_header(NULL, NULL, MNCC_REJ_REQ, DIRECTION_OUT);
 885                         add_trace("cause", "coding", "%d", rej->cause.coding);
 886                         add_trace("cause", "location", "%d", rej->cause.location);
 887                         add_trace("cause", "value", "%d", rej->cause.value);
 888                         end_trace();
 889                         send_and_free_mncc((struct gsm_network *)gsm->network, rej->msg_type, rej);
 890                         return 0;
 891                 }
 892                 /* creating port object, transparent until setup with hdlc */
 893                 SPRINT(name, "%s-%d-in", mISDNport->ifport->interface->name, mISDNport->portnum);
 894                 if (!(pgsm = new Pgsm(PORT_TYPE_GSM_IN, mISDNport, name, NULL, 0, 0, B_MODE_TRANSPARENT)))
 895
 896                         FATAL("Cannot create Port instance.\n");
 897         }
 898
 899         switch(msg_type) {
 900                 case MNCC_SETUP_IND:
 901                 pgsm->setup_ind(msg_type, callref, mncc);
 902                 break;
 903
 904                 case MNCC_START_DTMF_IND:
 905                 pgsm->start_dtmf_ind(msg_type, callref, mncc);
 906                 break;
 907
 908                 case MNCC_STOP_DTMF_IND:
 909                 pgsm->stop_dtmf_ind(msg_type, callref, mncc);
 910                 break;
 911
 912                 case MNCC_CALL_CONF_IND:
 913                 pgsm->call_conf_ind(msg_type, callref, mncc);
 914                 break;
 915
 916                 case MNCC_ALERT_IND:
 917                 pgsm->alert_ind(msg_type, callref, mncc);
 918                 break;
 919
 920                 case MNCC_SETUP_CNF:
 921                 pgsm->setup_cnf(msg_type, callref, mncc);
 922                 break;
 923
 924                 case MNCC_SETUP_COMPL_IND:
 925                 pgsm->setup_compl_ind(msg_type, callref, mncc);
 926                 break;
 927
 928                 case MNCC_DISC_IND:
 929                 pgsm->disc_ind(msg_type, callref, mncc);
 930                 break;
 931
 932                 case MNCC_REL_IND:
 933                 case MNCC_REL_CNF:
 934                 case MNCC_REJ_IND:
 935                 pgsm->rel_ind(msg_type, callref, mncc);
 936                 break;
 937
 938                 case MNCC_NOTIFY_IND:
 939                 pgsm->notify_ind(msg_type, callref, mncc);
 940                 break;
 941
 942                 case MNCC_HOLD_IND:
 943                 pgsm->hold_ind(msg_type, callref, mncc);
 944                 break;
 945
 946                 case MNCC_RETRIEVE_IND:
 947                 pgsm->retr_ind(msg_type, callref, mncc);
 948                 break;
 949
 950                 default:
 951                 PDEBUG(DEBUG_GSM, "Pgsm(%s) gsm port with (caller id %s) received unhandled nessage: 0x%x\n", pgsm->p_name, pgsm->p_callerinfo.id, msg_type);
 952         }
 953         return(0);
 954 }
 955
 956 /* MESSAGE_SETUP */
 957 void Pgsm::message_setup(unsigned int epoint_id, int message_id, union parameter *param)
 958 {
 959         struct lcr_msg *message;
 960         int ret;
 961         struct epoint_list *epointlist;
 962         struct gsm_mncc *mncc;
 963         int channel;
 964
 965         /* copy setup infos to port */
 966         memcpy(&p_callerinfo, &param->setup.callerinfo, sizeof(p_callerinfo));
 967         memcpy(&p_dialinginfo, &param->setup.dialinginfo, sizeof(p_dialinginfo));
 968         memcpy(&p_capainfo, &param->setup.capainfo, sizeof(p_capainfo));
 969         memcpy(&p_redirinfo, &param->setup.redirinfo, sizeof(p_redirinfo));
 970
 971         /* no number */
 972         if (!p_dialinginfo.id[0]) {
 973                 gsm_trace_header(p_m_mISDNport, this, MNCC_SETUP_REQ, DIRECTION_OUT);
 974                 add_trace("failure", NULL, "No dialed subscriber given.");
 975                 end_trace();
 976                 message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 977                 message->param.disconnectinfo.cause = 28;
 978                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 979                 message_put(message);
 980                 new_state(PORT_STATE_RELEASE);
 981                 p_m_delete = 1;
 982                 return;
 983         }
 984
 985         /* release if port is blocked */
 986         if (p_m_mISDNport->ifport->block) {
 987                 gsm_trace_header(p_m_mISDNport, this, MNCC_SETUP_REQ, DIRECTION_OUT);
 988                 add_trace("failure", NULL, "Port blocked.");
 989                 end_trace();
 990                 message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 991                 message->param.disconnectinfo.cause = 27; // temp. unavail.
 992                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 993                 message_put(message);
 994                 new_state(PORT_STATE_RELEASE);
 995                 p_m_delete = 1;
 996                 return;
 997         }
 998
 999         /* hunt channel */
1000         ret = channel = hunt_bchannel();
1001         if (ret < 0)
1002                 goto no_channel;
1003         /* open channel */
1004         ret = seize_bchannel(channel, 1);
1005         if (ret < 0) {
1006                 no_channel:
1007                 gsm_trace_header(p_m_mISDNport, this, MNCC_SETUP_REQ, DIRECTION_OUT);
1008                 add_trace("failure", NULL, "No internal audio channel available.");
1009                 end_trace();
1010                 message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
1011                 message->param.disconnectinfo.cause = 34;
1012                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
1013                 message_put(message);
1014                 new_state(PORT_STATE_RELEASE);
1015                 p_m_delete = 1;
1016                 return;
1017         }
1018         bchannel_event(p_m_mISDNport, p_m_b_index, B_EVENT_USE);
1019         if (bchannel_open(p_m_b_index))
1020                 goto no_channel;
1021
1022 //              SCPY(&p_m_tones_dir, param->setup.ext.tones_dir);
1023         /* screen outgoing caller id */
1024         do_screen(1, p_callerinfo.id, sizeof(p_callerinfo.id), &p_callerinfo.ntype, &p_callerinfo.present, p_m_mISDNport->ifport->interface);
1025
1026         /* attach only if not already */
1027         epointlist = p_epointlist;
1028         while(epointlist) {
1029                 if (epointlist->epoint_id == epoint_id)
1030                         break;
1031                 epointlist = epointlist->next;
1032         }
1033         if (!epointlist)
1034                 epointlist_new(epoint_id);
1035
1036         /* creating l3id */
1037         l1l2l3_trace_header(p_m_mISDNport, this, L3_NEW_L3ID_REQ, DIRECTION_OUT);
1038         p_m_g_callref = new_callref++;
1039         add_trace("callref", "new", "0x%x", p_m_g_callref);
1040         end_trace();
1041
1042         gsm_trace_header(p_m_mISDNport, this, MNCC_SETUP_REQ, DIRECTION_OUT);
1043         mncc = create_mncc(MNCC_SETUP_REQ, p_m_g_callref);
1044         /* caller information */
1045         mncc->fields |= MNCC_F_CALLING;
1046         mncc->calling.plan = 1;
1047         switch (p_callerinfo.ntype) {
1048                 case INFO_NTYPE_UNKNOWN:
1049                 mncc->calling.type = 0x0;
1050                 break;
1051                 case INFO_NTYPE_INTERNATIONAL:
1052                 mncc->calling.type = 0x1;
1053                 break;
1054                 case INFO_NTYPE_NATIONAL:
1055                 mncc->calling.type = 0x2;
1056                 break;
1057                 case INFO_NTYPE_SUBSCRIBER:
1058                 mncc->calling.type = 0x4;
1059                 break;
1060                 default: /* INFO_NTYPE_NOTPRESENT */
1061                 mncc->fields &= ~MNCC_F_CALLING;
1062                 break;
1063         }
1064         switch (p_callerinfo.screen) {
1065                 case INFO_SCREEN_USER:
1066                 mncc->calling.screen = 0;
1067                 break;
1068                 default: /* INFO_SCREEN_NETWORK */
1069                 mncc->calling.screen = 3;
1070                 break;
1071         }
1072         switch (p_callerinfo.present) {
1073                 case INFO_PRESENT_ALLOWED:
1074                 mncc->calling.present = 0;
1075                 break;
1076                 case INFO_PRESENT_RESTRICTED:
1077                 mncc->calling.present = 1;
1078                 break;
1079                 default: /* INFO_PRESENT_NOTAVAIL */
1080                 mncc->calling.present = 2;
1081                 break;
1082         }
1083         if (mncc->fields & MNCC_F_CALLING) {
1084                 SCPY(mncc->calling.number, p_callerinfo.id);
1085                 add_trace("calling", "type", "%d", mncc->calling.type);
1086                 add_trace("calling", "plan", "%d", mncc->calling.plan);
1087                 add_trace("calling", "present", "%d", mncc->calling.present);
1088                 add_trace("calling", "screen", "%d", mncc->calling.screen);
1089                 add_trace("calling", "number", "%s", mncc->calling.number);
1090         }
1091         /* dialing information */
1092         mncc->fields |= MNCC_F_CALLED;
1093         if (!strncmp(p_dialinginfo.id, "imsi-", 5)) {
1094                 SCPY(mncc->imsi, p_dialinginfo.id+5);
1095                 add_trace("dialing", "imsi", "%s", mncc->imsi);
1096         } else {
1097                 SCPY(mncc->called.number, p_dialinginfo.id);
1098                 add_trace("dialing", "number", "%s", mncc->called.number);
1099         }
1100
1101         /* sending user-user */
1102
1103         /* redirecting number */
1104         mncc->fields |= MNCC_F_REDIRECTING;
1105         mncc->redirecting.plan = 1;
1106         switch (p_redirinfo.ntype) {
1107                 case INFO_NTYPE_UNKNOWN:
1108                 mncc->redirecting.type = 0x0;
1109                 break;
1110                 case INFO_NTYPE_INTERNATIONAL:
1111                 mncc->redirecting.type = 0x1;
1112                 break;
1113                 case INFO_NTYPE_NATIONAL:
1114                 mncc->redirecting.type = 0x2;
1115                 break;
1116                 case INFO_NTYPE_SUBSCRIBER:
1117                 mncc->redirecting.type = 0x4;
1118                 break;
1119                 default: /* INFO_NTYPE_NOTPRESENT */
1120                 mncc->fields &= ~MNCC_F_REDIRECTING;
1121                 break;
1122         }
1123         switch (p_redirinfo.screen) {
1124                 case INFO_SCREEN_USER:
1125                 mncc->redirecting.screen = 0;
1126                 break;
1127                 default: /* INFO_SCREE_NETWORK */
1128                 mncc->redirecting.screen = 3;
1129                 break;
1130         }
1131         switch (p_redirinfo.present) {
1132                 case INFO_PRESENT_ALLOWED:
1133                 mncc->redirecting.present = 0;
1134                 break;
1135                 case INFO_PRESENT_RESTRICTED:
1136                 mncc->redirecting.present = 1;
1137                 break;
1138                 default: /* INFO_PRESENT_NOTAVAIL */
1139                 mncc->redirecting.present = 2;
1140                 break;
1141         }
1142         /* sending redirecting number only in ntmode */
1143         if (mncc->fields & MNCC_F_REDIRECTING) {
1144                 SCPY(mncc->redirecting.number, p_redirinfo.id);
1145                 add_trace("redir", "type", "%d", mncc->redirecting.type);
1146                 add_trace("redir", "plan", "%d", mncc->redirecting.plan);
1147                 add_trace("redir", "present", "%d", mncc->redirecting.present);
1148                 add_trace("redir", "screen", "%d", mncc->redirecting.screen);
1149                 add_trace("redir", "number", "%s", mncc->redirecting.number);
1150         }
1151         /* bearer capability */
1152         //todo
1153
1154         end_trace();
1155         send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
1156
1157         new_state(PORT_STATE_OUT_SETUP);
1158
1159         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
1160         message_put(message);
1161
1162         new_state(PORT_STATE_OUT_PROCEEDING);
1163 }
1164
1165 /* MESSAGE_NOTIFY */
1166 void Pgsm::message_notify(unsigned int epoint_id, int message_id, union parameter *param)
1167 {
1168         struct gsm_mncc *mncc;
1169         int notify;
1170
1171 //      printf("if = %d\n", param->notifyinfo.notify);
1172         if (param->notifyinfo.notify>INFO_NOTIFY_NONE) {
1173                 notify = param->notifyinfo.notify & 0x7f;
1174                 if (p_state!=PORT_STATE_CONNECT /*&& p_state!=PORT_STATE_IN_PROCEEDING*/ && p_state!=PORT_STATE_IN_ALERTING) {
1175                         /* queue notification */
1176                         if (p_m_g_notify_pending)
1177                                 message_free(p_m_g_notify_pending);
1178                         p_m_g_notify_pending = message_create(ACTIVE_EPOINT(p_epointlist), p_serial, EPOINT_TO_PORT, message_id);
1179                         memcpy(&p_m_g_notify_pending->param, param, sizeof(union parameter));
1180                 } else {
1181                         /* sending notification */
1182                         gsm_trace_header(p_m_mISDNport, this, MNCC_NOTIFY_REQ, DIRECTION_OUT);
1183                         add_trace("notify", NULL, "%d", notify);
1184                         end_trace();
1185                         mncc = create_mncc(MNCC_NOTIFY_REQ, p_m_g_callref);
1186                         mncc->notify = notify;
1187                         send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
1188                 }
1189         }
1190 }
1191
1192 /* MESSAGE_ALERTING */
1193 void Pgsm::message_alerting(unsigned int epoint_id, int message_id, union parameter *param)
1194 {
1195         struct gsm_mncc *mncc;
1196
1197         /* send alert */
1198         gsm_trace_header(p_m_mISDNport, this, MNCC_ALERT_REQ, DIRECTION_OUT);
1199         mncc = create_mncc(MNCC_ALERT_REQ, p_m_g_callref);
1200         if (p_m_mISDNport->tones) {
1201                 mncc->fields |= MNCC_F_PROGRESS;
1202                 mncc->progress.coding = 3; /* GSM */
1203                 mncc->progress.location = 1;
1204                 mncc->progress.descr = 8;
1205                 add_trace("progress", "coding", "%d", mncc->progress.coding);
1206                 add_trace("progress", "location", "%d", mncc->progress.location);
1207                 add_trace("progress", "descr", "%d", mncc->progress.descr);
1208         }
1209         end_trace();
1210         send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
1211
1212         new_state(PORT_STATE_IN_ALERTING);
1213
1214         if (p_m_mISDNport->tones && !p_m_g_tch_connected) { /* only if ... */
1215                 gsm_trace_header(p_m_mISDNport, this, MNCC_FRAME_RECV, DIRECTION_OUT);
1216                 end_trace();
1217                 mncc = create_mncc(MNCC_FRAME_RECV, p_m_g_callref);
1218                 send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
1219                 p_m_g_tch_connected = 1;
1220         }
1221 }
1222
1223 /* MESSAGE_CONNECT */
1224 void Pgsm::message_connect(unsigned int epoint_id, int message_id, union parameter *param)
1225 {
1226         struct gsm_mncc *mncc;
1227
1228         /* copy connected information */
1229         memcpy(&p_connectinfo, &param->connectinfo, sizeof(p_connectinfo));
1230         /* screen outgoing caller id */
1231         do_screen(1, p_connectinfo.id, sizeof(p_connectinfo.id), &p_connectinfo.ntype, &p_connectinfo.present, p_m_mISDNport->ifport->interface);
1232
1233         /* send connect */
1234         mncc = create_mncc(MNCC_SETUP_RSP, p_m_g_callref);
1235         gsm_trace_header(p_m_mISDNport, this, MNCC_SETUP_RSP, DIRECTION_OUT);
1236         /* caller information */
1237         mncc->fields |= MNCC_F_CONNECTED;
1238         mncc->connected.plan = 1;
1239         switch (p_callerinfo.ntype) {
1240                 case INFO_NTYPE_UNKNOWN:
1241                 mncc->connected.type = 0x0;
1242                 break;
1243                 case INFO_NTYPE_INTERNATIONAL:
1244                 mncc->connected.type = 0x1;
1245                 break;
1246                 case INFO_NTYPE_NATIONAL:
1247                 mncc->connected.type = 0x2;
1248                 break;
1249                 case INFO_NTYPE_SUBSCRIBER:
1250                 mncc->connected.type = 0x4;
1251                 break;
1252                 default: /* INFO_NTYPE_NOTPRESENT */
1253                 mncc->fields &= ~MNCC_F_CONNECTED;
1254                 break;
1255         }
1256         switch (p_callerinfo.screen) {
1257                 case INFO_SCREEN_USER:
1258                 mncc->connected.screen = 0;
1259                 break;
1260                 default: /* INFO_SCREEN_NETWORK */
1261                 mncc->connected.screen = 3;
1262                 break;
1263         }
1264         switch (p_callerinfo.present) {
1265                 case INFO_PRESENT_ALLOWED:
1266                 mncc->connected.present = 0;
1267                 break;
1268                 case INFO_PRESENT_RESTRICTED:
1269                 mncc->connected.present = 1;
1270                 break;
1271                 default: /* INFO_PRESENT_NOTAVAIL */
1272                 mncc->connected.present = 2;
1273                 break;
1274         }
1275         if (mncc->fields & MNCC_F_CONNECTED) {
1276                 SCPY(mncc->connected.number, p_connectinfo.id);
1277                 add_trace("connected", "type", "%d", mncc->connected.type);
1278                 add_trace("connected", "plan", "%d", mncc->connected.plan);
1279                 add_trace("connected", "present", "%d", mncc->connected.present);
1280                 add_trace("connected", "screen", "%d", mncc->connected.screen);
1281                 add_trace("connected", "number", "%s", mncc->connected.number);
1282         }
1283         end_trace();
1284         send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
1285
1286         new_state(PORT_STATE_CONNECT_WAITING);
1287 }
1288
1289 /* MESSAGE_DISCONNECT */
1290 void Pgsm::message_disconnect(unsigned int epoint_id, int message_id, union parameter *param)
1291 {
1292         struct gsm_mncc *mncc;
1293
1294         /* send disconnect */
1295         mncc = create_mncc(MNCC_DISC_REQ, p_m_g_callref);
1296         gsm_trace_header(p_m_mISDNport, this, MNCC_DISC_REQ, DIRECTION_OUT);
1297         if (p_m_mISDNport->tones) {
1298                 mncc->fields |= MNCC_F_PROGRESS;
1299                 mncc->progress.coding = 3; /* GSM */
1300                 mncc->progress.location = 1;
1301                 mncc->progress.descr = 8;
1302                 add_trace("progress", "coding", "%d", mncc->progress.coding);
1303                 add_trace("progress", "location", "%d", mncc->progress.location);
1304                 add_trace("progress", "descr", "%d", mncc->progress.descr);
1305         }
1306         mncc->fields |= MNCC_F_CAUSE;
1307         mncc->cause.coding = 3;
1308         mncc->cause.location = param->disconnectinfo.location;
1309         mncc->cause.value = param->disconnectinfo.cause;
1310         add_trace("cause", "coding", "%d", mncc->cause.coding);
1311         add_trace("cause", "location", "%d", mncc->cause.location);
1312         add_trace("cause", "value", "%d", mncc->cause.value);
1313         end_trace();
1314         send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
1315
1316         new_state(PORT_STATE_OUT_DISCONNECT);
1317
1318         if (p_m_mISDNport->tones && !p_m_g_tch_connected) { /* only if ... */
1319                 gsm_trace_header(p_m_mISDNport, this, MNCC_FRAME_RECV, DIRECTION_OUT);
1320                 end_trace();
1321                 mncc = create_mncc(MNCC_FRAME_RECV, p_m_g_callref);
1322                 send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
1323                 p_m_g_tch_connected = 1;
1324         }
1325 }
1326
1327
1328 /* MESSAGE_RELEASE */
1329 void Pgsm::message_release(unsigned int epoint_id, int message_id, union parameter *param)
1330 {
1331         struct gsm_mncc *mncc;
1332
1333         /* send release */
1334         mncc = create_mncc(MNCC_REL_REQ, p_m_g_callref);
1335         gsm_trace_header(p_m_mISDNport, this, MNCC_REL_REQ, DIRECTION_OUT);
1336         mncc->fields |= MNCC_F_CAUSE;
1337         mncc->cause.coding = 3;
1338         mncc->cause.location = param->disconnectinfo.location;
1339         mncc->cause.value = param->disconnectinfo.cause;
1340         add_trace("cause", "coding", "%d", mncc->cause.coding);
1341         add_trace("cause", "location", "%d", mncc->cause.location);
1342         add_trace("cause", "value", "%d", mncc->cause.value);
1343         end_trace();
1344         send_and_free_mncc((struct gsm_network *)gsm->network, mncc->msg_type, mncc);
1345
1346         new_state(PORT_STATE_RELEASE);
1347         p_m_delete = 1;
1348         return;
1349 }
1350
1351
1352 /*
1353  * endpoint sends messages to the port
1354  */
1355 int Pgsm::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
1356 {
1357         if (PmISDN::message_epoint(epoint_id, message_id, param))
1358                 return(1);
1359
1360         switch(message_id) {
1361                 case MESSAGE_SETUP: /* dial-out command received from epoint */
1362                 if (p_state!=PORT_STATE_IDLE)
1363                         break;
1364                 message_setup(epoint_id, message_id, param);
1365                 break;
1366
1367                 case MESSAGE_NOTIFY: /* display and notifications */
1368                 message_notify(epoint_id, message_id, param);
1369                 break;
1370
1371 //              case MESSAGE_FACILITY: /* facility message */
1372 //              message_facility(epoint_id, message_id, param);
1373 //              break;
1374
1375                 case MESSAGE_PROCEEDING: /* message not handles */
1376                 break;
1377
1378                 case MESSAGE_ALERTING: /* call of endpoint is ringing */
1379                 if (p_state!=PORT_STATE_IN_PROCEEDING)
1380                         break;
1381                 message_alerting(epoint_id, message_id, param);
1382                 if (p_m_g_notify_pending) {
1383                         /* send pending notify message during connect */
1384                         message_notify(ACTIVE_EPOINT(p_epointlist), p_m_g_notify_pending->type, &p_m_g_notify_pending->param);
1385                         message_free(p_m_g_notify_pending);
1386                         p_m_g_notify_pending = NULL;
1387                 }
1388                 break;
1389
1390                 case MESSAGE_CONNECT: /* call of endpoint is connected */
1391                 if (p_state!=PORT_STATE_IN_PROCEEDING
1392                  && p_state!=PORT_STATE_IN_ALERTING)
1393                         break;
1394                 message_connect(epoint_id, message_id, param);
1395                 if (p_m_g_notify_pending) {
1396                         /* send pending notify message during connect */
1397                         message_notify(ACTIVE_EPOINT(p_epointlist), p_m_g_notify_pending->type, &p_m_g_notify_pending->param);
1398                         message_free(p_m_g_notify_pending);
1399                         p_m_g_notify_pending = NULL;
1400                 }
1401                 break;
1402
1403                 case MESSAGE_DISCONNECT: /* call has been disconnected */
1404                 if (p_state!=PORT_STATE_IN_PROCEEDING
1405                  && p_state!=PORT_STATE_IN_ALERTING
1406                  && p_state!=PORT_STATE_OUT_SETUP
1407                  && p_state!=PORT_STATE_OUT_OVERLAP
1408                  && p_state!=PORT_STATE_OUT_PROCEEDING
1409                  && p_state!=PORT_STATE_OUT_ALERTING
1410                  && p_state!=PORT_STATE_CONNECT
1411                  && p_state!=PORT_STATE_CONNECT_WAITING)
1412                         break;
1413                 message_disconnect(epoint_id, message_id, param);
1414                 break;
1415
1416                 case MESSAGE_RELEASE: /* release isdn port */
1417                 if (p_state==PORT_STATE_RELEASE)
1418                         break;
1419                 message_release(epoint_id, message_id, param);
1420                 break;
1421
1422                 default:
1423                 PDEBUG(DEBUG_GSM, "Pgsm(%s) gsm port with (caller id %s) received unhandled nessage: %d\n", p_name, p_callerinfo.id, message_id);
1424         }
1425
1426         return(1);
1427 }
1428
1429
1430 /*
1431  * handler
1432  */
1433 int Pgsm::handler(void)
1434 {
1435         int ret;
1436         int work = 0;
1437         unsigned char buffer[2048+MISDN_HEADER_LEN];
1438         struct mISDNhead *hh = (struct mISDNhead *)buffer;
1439
1440         if ((ret = PmISDN::handler()))
1441                 return(ret);
1442
1443         /* handle destruction */
1444         if (p_m_delete) {
1445                 delete this;
1446                 return(-1);
1447         }
1448
1449         /* handle message from bchannel */
1450         if (p_m_g_gsm_b_sock > -1) {
1451                 ret = recv(p_m_g_gsm_b_sock, buffer, sizeof(buffer), 0);
1452                 if (ret >= (int)MISDN_HEADER_LEN) {
1453                         switch(hh->prim) {
1454                                 /* we don't care about confirms, we use rx data to sync tx */
1455                                 case PH_DATA_CNF:
1456                                 break;
1457                                 /* we receive audio data, we respond to it AND we send tones */
1458                                 case PH_DATA_IND:
1459                                 bchannel_receive(hh, buffer+MISDN_HEADER_LEN, ret-MISDN_HEADER_LEN);
1460                                 break;
1461                                 case PH_ACTIVATE_IND:
1462                                 p_m_g_gsm_b_active = 1;
1463                                 break;
1464                                 case PH_DEACTIVATE_IND:
1465                                 p_m_g_gsm_b_active = 0;
1466                                 break;
1467                         }
1468                         work = 1;
1469                 } else {
1470                         if (ret < 0 && errno != EWOULDBLOCK)
1471                                 PERROR("Read from GSM port, index %d failed with return code %d\n", ret);
1472                 }
1473         }
1474
1475         return(work);
1476 }
1477
1478
1479 /*
1480  * handles bsc select function within LCR's main loop
1481  */
1482 int handle_gsm(void)
1483 {
1484         int ret1, ret2;
1485
1486         ret1 = bsc_upqueue((struct gsm_network *)gsm->network);
1487         ret2 = bsc_select_main(1); /* polling */
1488         if (ret1 || ret2)
1489                 return 1;
1490         return 0;
1491 }
1492
1493 static void gsm_sock_close(void)
1494 {
1495         if (gsm->gsm_sock > -1)
1496                 close(gsm->gsm_sock);
1497         gsm->gsm_sock = -1;
1498 }
1499
1500 static int gsm_sock_open(char *portname)
1501 {
1502         int ret;
1503         int cnt;
1504         unsigned long on = 1;
1505         struct sockaddr_mISDN addr;
1506         struct mISDN_devinfo devinfo;
1507         int pri, bri;
1508
1509         /* check port counts */
1510         ret = ioctl(mISDNsocket, IMGETCOUNT, &cnt);
1511         if (ret < 0) {
1512                 fprintf(stderr, "Cannot get number of mISDN devices. (ioctl IMGETCOUNT failed ret=%d)\n", ret);
1513                 return(ret);
1514         }
1515
1516         if (cnt <= 0) {
1517                 PERROR_RUNTIME("Found no card. Please be sure to load card drivers.\n");
1518                 return -EIO;
1519         }
1520         gsm->gsm_port = mISDN_getportbyname(mISDNsocket, cnt, portname);
1521         if (gsm->gsm_port < 0) {
1522                 PERROR_RUNTIME("Port name '%s' not found, did you load loopback interface for GSM?.\n", portname);
1523                 return gsm->gsm_port;
1524         }
1525         /* get protocol */
1526         bri = pri = 0;
1527         devinfo.id = gsm->gsm_port;
1528         ret = ioctl(mISDNsocket, IMGETDEVINFO, &devinfo);
1529         if (ret < 0) {
1530                 PERROR_RUNTIME("Cannot get device information for port %d. (ioctl IMGETDEVINFO failed ret=%d)\n", gsm->gsm_port, ret);
1531                 return ret;
1532         }
1533         if (devinfo.Dprotocols & (1 << ISDN_P_TE_S0)) {
1534                 bri = 1;
1535         }
1536         if (devinfo.Dprotocols & (1 << ISDN_P_TE_E1)) {
1537                 pri = 1;
1538         }
1539         if (!pri && !pri) {
1540                 PERROR_RUNTIME("GSM port %d does not support TE PRI or TE BRI.\n", gsm->gsm_port);
1541         }
1542         /* open socket */
1543         if ((gsm->gsm_sock = socket(PF_ISDN, SOCK_DGRAM, (pri)?ISDN_P_TE_E1:ISDN_P_TE_S0)) < 0) {
1544                 PERROR_RUNTIME("GSM port %d failed to open socket.\n", gsm->gsm_port);
1545                 gsm_sock_close();
1546                 return gsm->gsm_sock;
1547         }
1548         /* set nonblocking io */
1549         if ((ret = ioctl(gsm->gsm_sock, FIONBIO, &on)) < 0) {
1550                 PERROR_RUNTIME("GSM port %d failed to set socket into nonblocking io.\n", gsm->gsm_port);
1551                 gsm_sock_close();
1552                 return ret;
1553         }
1554         /* bind socket to dchannel */
1555         memset(&addr, 0, sizeof(addr));
1556         addr.family = AF_ISDN;
1557         addr.dev = gsm->gsm_port;
1558         addr.channel = 0;
1559         if ((ret = bind(gsm->gsm_sock, (struct sockaddr *)&addr, sizeof(addr))) < 0) {
1560                 PERROR_RUNTIME("GSM port %d failed to bind socket. (name = %s errno=%d)\n", gsm->gsm_port, portname, errno);
1561                 gsm_sock_close();
1562                 return (ret);
1563         }
1564
1565         return 0;
1566 }
1567
1568
1569 int gsm_exit(int rc)
1570 {
1571         /* free gsm instance */
1572         if (gsm) {
1573                 if (gsm->gsm_sock > -1)
1574                         gsm_sock_close();
1575                 /* shutdown network */
1576                 if (gsm->network)
1577                         bsc_shutdown_net((struct gsm_network *)gsm->network);
1578                 /* free network */
1579 //              if (gsm->network) {
1580 //                      free((struct gsm_network *)gsm->network); /* TBD */
1581 //              }
1582                 free(gsm);
1583                 gsm = NULL;
1584         }
1585
1586         return(rc);
1587 }
1588
1589 int gsm_init(void)
1590 {
1591         char hlr[128], cfg[128], filename[128];
1592         mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
1593         int pcapfd, rc;
1594
1595         tall_bsc_ctx = talloc_named_const(NULL, 1, "openbsc");
1596         talloc_ctx_init();
1597         on_dso_load_token();
1598         on_dso_load_rrlp();
1599
1600         /* seed the PRNG */
1601         srand(time(NULL));
1602
1603         /* create gsm instance */
1604         gsm = (struct lcr_gsm *)MALLOC(sizeof(struct lcr_gsm));
1605         gsm->gsm_sock = -1;
1606
1607         /* parse options */
1608         if (!gsm_conf(&gsm->conf)) {
1609                 PERROR("%s", gsm_conf_error);
1610                 return gsm_exit(-EINVAL);
1611         }
1612
1613         /* set debug */
1614         stderr_target = debug_target_create_stderr();
1615         if (gsm->conf.debug[0])
1616                 debug_parse_category_mask(stderr_target, gsm->conf.debug);
1617
1618         /* open pcap file */
1619         if (gsm->conf.pcapfile[0]) {
1620                 if (gsm->conf.pcapfile[0] == '/')
1621                         SCPY(filename, gsm->conf.pcapfile);
1622                 else
1623                         SPRINT(filename, "%s/%s", CONFIG_DATA, gsm->conf.pcapfile);
1624                 pcapfd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, mode);
1625                 if (pcapfd < 0) {
1626                         PERROR("Failed to open file for pcap\n");
1627                         return gsm_exit(-1);
1628                 }
1629                 e1_set_pcap_fd(pcapfd);
1630         }
1631
1632         /* use RTP proxy for audio streaming */
1633         ipacc_rtp_direct = 0;
1634
1635         /* init database */
1636         if (gsm->conf.hlr[0] == '/')
1637                 SCPY(hlr, gsm->conf.hlr);
1638         else
1639                 SPRINT(hlr, "%s/%s", CONFIG_DATA, gsm->conf.hlr);
1640         if (db_init(hlr)) {
1641                 PERROR("GSM DB: Failed to init database '%s'. Please check the option settings.\n", hlr);
1642                 return gsm_exit(-1);
1643         }
1644         printf("DB: Database initialized.\n");
1645         if (db_prepare()) {
1646                 PERROR("GSM DB: Failed to prepare database.\n");
1647                 return gsm_exit(-1);
1648         }
1649         printf("DB: Database prepared.\n");
1650
1651         /* bootstrap network */
1652         if (gsm->conf.openbsc_cfg[0] == '/')
1653                 SCPY(cfg, gsm->conf.openbsc_cfg);
1654         else
1655                 SPRINT(cfg, "%s/%s", CONFIG_DATA, gsm->conf.openbsc_cfg);
1656         rc = bsc_bootstrap_network(&message_bsc, cfg);
1657         if (rc < 0) {
1658                 PERROR("Failed to bootstrap GSM network.\n");
1659                 return gsm_exit(-1);
1660         }
1661         gsm->network = bsc_gsmnet;
1662
1663         /* open gsm loop interface */
1664         if (gsm_sock_open(gsm->conf.interface_bsc)) {
1665                 return gsm_exit(-1);
1666         }
1667
1668         return 0;
1669 }
1670