gsm_bs.cpp

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** LCR                                                                       **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** mISDN gsm (BS mode)                                                       **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 #include "main.h"
  13 #include "config.h"
  14
  15 #ifndef _GNU_SOURCE
  16 #define _GNU_SOURCE
  17 #endif
  18 extern "C" {
  19 #include <assert.h>
  20 #include <getopt.h>
  21
  22 #include <sys/socket.h>
  23 #include <sys/un.h>
  24
  25 #include <openbsc/mncc.h>
  26 #include <openbsc/trau_frame.h>
  27 }
  28
  29 #define SOCKET_RETRY_TIMER      5
  30
  31 /*
  32  * DTMF stuff
  33  */
  34 unsigned char dtmf_samples[16][8000];
  35 static int dtmf_x[4] = { 1209, 1336, 1477, 1633 };
  36 static int dtmf_y[4] = { 697, 770, 852, 941 };
  37
  38 void generate_dtmf(void)
  39 {
  40         double fx, fy, sample;
  41         int i, x, y;
  42         unsigned char *law;
  43
  44         for (y = 0; y < 4; y++) {
  45                 fy = 2 * 3.1415927 * ((double)dtmf_y[y]) / 8000.0;
  46                 for (x = 0; x < 4; x++) {
  47                         fx = 2 * 3.1415927 * ((double)dtmf_x[x]) / 8000.0;
  48                         law = dtmf_samples[y << 2 | x];
  49                         for (i = 0; i < 8000; i++) {
  50                                 sample = sin(fy * ((double)i)) * 0.251 * 32767.0; /* -6 dB */
  51                                 sample += sin(fx * ((double)i)) * 0.158 * 32767.0; /* -8 dB */
  52                                 *law++ = audio_s16_to_law[(int)sample & 0xffff];
  53                         }
  54                 }
  55         }
  56 }
  57
  58
  59 /*
  60  * constructor
  61  */
  62 Pgsm_bs::Pgsm_bs(int type, struct mISDNport *mISDNport, char *portname, struct port_settings *settings, int channel, int exclusive, int mode) : Pgsm(type, mISDNport, portname, settings, channel, exclusive, mode)
  63 {
  64         p_m_g_instance = gsm->network;
  65         p_m_g_dtmf = NULL;
  66         p_m_g_dtmf_index = 0;
  67
  68         PDEBUG(DEBUG_GSM, "Created new GSMBSPort(%s).\n", portname);
  69 }
  70
  71 /*
  72  * destructor
  73  */
  74 Pgsm_bs::~Pgsm_bs()
  75 {
  76         PDEBUG(DEBUG_GSM, "Destroyed GSM BS process(%s).\n", p_name);
  77 }
  78
  79 /* DTMF INDICATION */
  80 void Pgsm_bs::start_dtmf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
  81 {
  82 //      struct lcr_msg *message;
  83         struct gsm_mncc *resp;
  84
  85         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
  86         add_trace("keypad", NULL, "%c", mncc->keypad);
  87         end_trace();
  88         SPRINT(p_dialinginfo.id, "%c", mncc->keypad);
  89         p_dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
  90
  91         /* send resp */
  92         gsm_trace_header(p_m_mISDNport, this, MNCC_START_DTMF_RSP, DIRECTION_OUT);
  93         add_trace("keypad", NULL, "%c", mncc->keypad);
  94         end_trace();
  95         resp = create_mncc(MNCC_START_DTMF_RSP, p_m_g_callref);
  96         resp->keypad = mncc->keypad;
  97         send_and_free_mncc(p_m_g_instance, resp->msg_type, resp);
  98
  99 #if 0
 100         /* send dialing information */
 101         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_INFORMATION);
 102         memcpy(&message->param.information, &p_dialinginfo, sizeof(struct dialing_info));
 103         message_put(message);
 104 #endif
 105
 106         /* generate DTMF tones */
 107         switch (mncc->keypad) {
 108                 case '1': p_m_g_dtmf = dtmf_samples[0]; break;
 109                 case '2': p_m_g_dtmf = dtmf_samples[1]; break;
 110                 case '3': p_m_g_dtmf = dtmf_samples[2]; break;
 111                 case 'a':
 112                 case 'A': p_m_g_dtmf = dtmf_samples[3]; break;
 113                 case '4': p_m_g_dtmf = dtmf_samples[4]; break;
 114                 case '5': p_m_g_dtmf = dtmf_samples[5]; break;
 115                 case '6': p_m_g_dtmf = dtmf_samples[6]; break;
 116                 case 'b':
 117                 case 'B': p_m_g_dtmf = dtmf_samples[7]; break;
 118                 case '7': p_m_g_dtmf = dtmf_samples[8]; break;
 119                 case '8': p_m_g_dtmf = dtmf_samples[9]; break;
 120                 case '9': p_m_g_dtmf = dtmf_samples[10]; break;
 121                 case 'c':
 122                 case 'C': p_m_g_dtmf = dtmf_samples[11]; break;
 123                 case '*': p_m_g_dtmf = dtmf_samples[12]; break;
 124                 case '0': p_m_g_dtmf = dtmf_samples[13]; break;
 125                 case '#': p_m_g_dtmf = dtmf_samples[14]; break;
 126                 case 'd':
 127                 case 'D': p_m_g_dtmf = dtmf_samples[15]; break;
 128         }
 129         p_m_g_dtmf_index = 0;
 130 }
 131 void Pgsm_bs::stop_dtmf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 132 {
 133         struct gsm_mncc *resp;
 134
 135         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 136         add_trace("keypad", NULL, "%c", mncc->keypad);
 137         end_trace();
 138
 139         /* send resp */
 140         gsm_trace_header(p_m_mISDNport, this, MNCC_STOP_DTMF_RSP, DIRECTION_OUT);
 141         add_trace("keypad", NULL, "%c", mncc->keypad);
 142         end_trace();
 143         resp = create_mncc(MNCC_STOP_DTMF_RSP, p_m_g_callref);
 144         resp->keypad = mncc->keypad;
 145         send_and_free_mncc(p_m_g_instance, resp->msg_type, resp);
 146
 147         /* stop DTMF */
 148         p_m_g_dtmf = NULL;
 149 }
 150
 151 /* HOLD INDICATION */
 152 void Pgsm_bs::hold_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 153 {
 154         struct lcr_msg *message;
 155         struct gsm_mncc *resp, *frame;
 156
 157         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 158         end_trace();
 159
 160         /* notify the hold of call */
 161         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 162         message->param.notifyinfo.notify = INFO_NOTIFY_REMOTE_HOLD;
 163         message->param.notifyinfo.local = 1; /* call is held by supplementary service */
 164         message_put(message);
 165
 166         /* acknowledge hold */
 167         gsm_trace_header(p_m_mISDNport, this, MNCC_HOLD_CNF, DIRECTION_OUT);
 168         end_trace();
 169         resp = create_mncc(MNCC_HOLD_CNF, p_m_g_callref);
 170         send_and_free_mncc(p_m_g_instance, resp->msg_type, resp);
 171
 172         /* disable audio */
 173         if (p_m_g_tch_connected) { /* it should be true */
 174                 gsm_trace_header(p_m_mISDNport, this, MNCC_FRAME_DROP, DIRECTION_OUT);
 175                 end_trace();
 176                 frame = create_mncc(MNCC_FRAME_DROP, p_m_g_callref);
 177                 send_and_free_mncc(p_m_g_instance, frame->msg_type, frame);
 178                 p_m_g_tch_connected = 0;
 179         }
 180 }
 181
 182
 183 /* RETRIEVE INDICATION */
 184 void Pgsm_bs::retr_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 185 {
 186         struct lcr_msg *message;
 187         struct gsm_mncc *resp, *frame;
 188
 189         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 190         end_trace();
 191
 192         /* notify the retrieve of call */
 193         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 194         message->param.notifyinfo.notify = INFO_NOTIFY_REMOTE_RETRIEVAL;
 195         message->param.notifyinfo.local = 1; /* call is retrieved by supplementary service */
 196         message_put(message);
 197
 198         /* acknowledge retr */
 199         gsm_trace_header(p_m_mISDNport, this, MNCC_RETRIEVE_CNF, DIRECTION_OUT);
 200         end_trace();
 201         resp = create_mncc(MNCC_RETRIEVE_CNF, p_m_g_callref);
 202         send_and_free_mncc(p_m_g_instance, resp->msg_type, resp);
 203
 204         /* enable audio */
 205         if (!p_m_g_tch_connected) { /* it should be true */
 206                 gsm_trace_header(p_m_mISDNport, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 207                 end_trace();
 208                 frame = create_mncc(MNCC_FRAME_RECV, p_m_g_callref);
 209                 send_and_free_mncc(p_m_g_instance, frame->msg_type, frame);
 210                 p_m_g_tch_connected = 1;
 211         }
 212 }
 213
 214 /*
 215  * handles all indications
 216  */
 217 /* SETUP INDICATION */
 218 void Pgsm_bs::setup_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 219 {
 220         int ret;
 221         class Endpoint *epoint;
 222         struct lcr_msg *message;
 223         int channel;
 224         struct gsm_mncc *mode, *proceeding, *frame;
 225
 226         /* process given callref */
 227         l1l2l3_trace_header(p_m_mISDNport, this, L3_NEW_L3ID_IND, DIRECTION_IN);
 228         add_trace("callref", "new", "0x%x", callref);
 229         if (p_m_g_callref) {
 230                 /* release in case the ID is already in use */
 231                 add_trace("error", NULL, "callref already in use");
 232                 end_trace();
 233                 mncc = create_mncc(MNCC_REJ_REQ, callref);
 234                 gsm_trace_header(p_m_mISDNport, this, MNCC_REJ_REQ, DIRECTION_OUT);
 235                 mncc->fields |= MNCC_F_CAUSE;
 236                 mncc->cause.coding = 3;
 237                 mncc->cause.location = 1;
 238                 mncc->cause.value = 47;
 239                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 240                 add_trace("cause", "location", "%d", mncc->cause.location);
 241                 add_trace("cause", "value", "%d", mncc->cause.value);
 242                 add_trace("reason", NULL, "callref already in use");
 243                 end_trace();
 244                 send_and_free_mncc(p_m_g_instance, mncc->msg_type, mncc);
 245                 new_state(PORT_STATE_RELEASE);
 246                 trigger_work(&p_m_g_delete);
 247                 return;
 248         }
 249         p_m_g_callref = callref;
 250         end_trace();
 251
 252         /* if blocked, release call with MT_RELEASE_COMPLETE */
 253         if (p_m_mISDNport->ifport->block) {
 254                 mncc = create_mncc(MNCC_REJ_REQ, p_m_g_callref);
 255                 gsm_trace_header(p_m_mISDNport, this, MNCC_REJ_REQ, DIRECTION_OUT);
 256                 mncc->fields |= MNCC_F_CAUSE;
 257                 mncc->cause.coding = 3;
 258                 mncc->cause.location = 1;
 259                 mncc->cause.value = 27;
 260                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 261                 add_trace("cause", "location", "%d", mncc->cause.location);
 262                 add_trace("cause", "value", "%d", mncc->cause.value);
 263                 add_trace("reason", NULL, "port is blocked");
 264                 end_trace();
 265                 send_and_free_mncc(p_m_g_instance, mncc->msg_type, mncc);
 266                 new_state(PORT_STATE_RELEASE);
 267                 trigger_work(&p_m_g_delete);
 268                 return;
 269         }
 270
 271         /* caller info */
 272         if (mncc->clir.inv)
 273                 p_callerinfo.present = INFO_PRESENT_RESTRICTED;
 274         else
 275                 p_callerinfo.present = INFO_PRESENT_ALLOWED;
 276         if (mncc->calling.number[0])
 277                 SCPY(p_callerinfo.id, mncc->calling.number);
 278         else
 279                 p_callerinfo.present = INFO_PRESENT_NOTAVAIL;
 280         SCPY(p_callerinfo.imsi, mncc->imsi);
 281         p_callerinfo.screen = INFO_SCREEN_NETWORK;
 282         p_callerinfo.ntype = INFO_NTYPE_UNKNOWN;
 283         p_callerinfo.isdn_port = p_m_portnum;
 284         SCPY(p_callerinfo.interface, p_m_mISDNport->ifport->interface->name);
 285
 286         /* dialing information */
 287         SCAT(p_dialinginfo.id, mncc->called.number);
 288         switch (mncc->called.type) {
 289                 case 0x1:
 290                 p_dialinginfo.ntype = INFO_NTYPE_INTERNATIONAL;
 291                 break;
 292                 case 0x2:
 293                 p_dialinginfo.ntype = INFO_NTYPE_NATIONAL;
 294                 break;
 295                 case 0x4:
 296                 p_dialinginfo.ntype = INFO_NTYPE_SUBSCRIBER;
 297                 break;
 298                 default:
 299                 p_dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
 300                 break;
 301         }
 302         if (mncc->emergency) {
 303                 SCPY(p_dialinginfo.id, "emergency");
 304         }
 305         p_dialinginfo.sending_complete = 1;
 306
 307         /* bearer capability */
 308         // todo
 309         p_capainfo.bearer_capa = INFO_BC_SPEECH;
 310         p_capainfo.bearer_info1 = (options.law=='a')?3:2;
 311         p_capainfo.bearer_mode = INFO_BMODE_CIRCUIT;
 312         p_capainfo.source_mode = B_MODE_TRANSPARENT;
 313         p_m_g_mode = p_capainfo.source_mode;
 314
 315         /* useruser */
 316
 317         /* hunt channel */
 318         ret = channel = hunt_bchannel();
 319         if (ret < 0)
 320                 goto no_channel;
 321
 322         /* open channel */
 323         ret = seize_bchannel(channel, 1);
 324         if (ret < 0) {
 325                 no_channel:
 326                 mncc = create_mncc(MNCC_REJ_REQ, p_m_g_callref);
 327                 gsm_trace_header(p_m_mISDNport, this, MNCC_REJ_REQ, DIRECTION_OUT);
 328                 mncc->fields |= MNCC_F_CAUSE;
 329                 mncc->cause.coding = 3;
 330                 mncc->cause.location = 1;
 331                 mncc->cause.value = 34;
 332                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 333                 add_trace("cause", "location", "%d", mncc->cause.location);
 334                 add_trace("cause", "value", "%d", mncc->cause.value);
 335                 add_trace("reason", NULL, "no channel");
 336                 end_trace();
 337                 send_and_free_mncc(p_m_g_instance, mncc->msg_type, mncc);
 338                 new_state(PORT_STATE_RELEASE);
 339                 trigger_work(&p_m_g_delete);
 340                 return;
 341         }
 342         bchannel_event(p_m_mISDNport, p_m_b_index, B_EVENT_USE);
 343         if (bchannel_open(p_m_b_index))
 344                 goto no_channel;
 345
 346         /* what infos did we got ... */
 347         gsm_trace_header(p_m_mISDNport, this, msg_type, DIRECTION_IN);
 348         if (p_callerinfo.id[0])
 349                 add_trace("calling", "number", "%s", p_callerinfo.id);
 350         else
 351                 SPRINT(p_callerinfo.id, "imsi-%s", p_callerinfo.imsi);
 352         add_trace("calling", "imsi", "%s", p_callerinfo.imsi);
 353         add_trace("dialing", "number", "%s", p_dialinginfo.id);
 354         end_trace();
 355
 356         /* create endpoint */
 357         if (p_epointlist)
 358                 FATAL("Incoming call but already got an endpoint.\n");
 359         if (!(epoint = new Endpoint(p_serial, 0)))
 360                 FATAL("No memory for Endpoint instance\n");
 361         if (!(epoint->ep_app = new DEFAULT_ENDPOINT_APP(epoint, 0))) //incoming
 362                 FATAL("No memory for Endpoint Application instance\n");
 363         epointlist_new(epoint->ep_serial);
 364
 365         /* modify lchan to GSM codec V1 */
 366         gsm_trace_header(p_m_mISDNport, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
 367         mode = create_mncc(MNCC_LCHAN_MODIFY, p_m_g_callref);
 368         mode->lchan_mode = 0x01; /* GSM V1 */
 369         add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
 370         end_trace();
 371         send_and_free_mncc(p_m_g_instance, mode->msg_type, mode);
 372
 373         /* send call proceeding */
 374         gsm_trace_header(p_m_mISDNport, this, MNCC_CALL_PROC_REQ, DIRECTION_OUT);
 375         proceeding = create_mncc(MNCC_CALL_PROC_REQ, p_m_g_callref);
 376         if (p_m_mISDNport->tones) {
 377                 proceeding->fields |= MNCC_F_PROGRESS;
 378                 proceeding->progress.coding = 3; /* GSM */
 379                 proceeding->progress.location = 1;
 380                 proceeding->progress.descr = 8;
 381                 add_trace("progress", "coding", "%d", proceeding->progress.coding);
 382                 add_trace("progress", "location", "%d", proceeding->progress.location);
 383                 add_trace("progress", "descr", "%d", proceeding->progress.descr);
 384         }
 385         end_trace();
 386         send_and_free_mncc(p_m_g_instance, proceeding->msg_type, proceeding);
 387
 388         new_state(PORT_STATE_IN_PROCEEDING);
 389
 390         if (p_m_mISDNport->tones && !p_m_g_tch_connected) { /* only if ... */
 391                 gsm_trace_header(p_m_mISDNport, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 392                 end_trace();
 393                 frame = create_mncc(MNCC_FRAME_RECV, p_m_g_callref);
 394                 send_and_free_mncc(p_m_g_instance, frame->msg_type, frame);
 395                 p_m_g_tch_connected = 1;
 396         }
 397
 398         /* send setup message to endpoit */
 399         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_SETUP);
 400         message->param.setup.isdn_port = p_m_portnum;
 401         message->param.setup.port_type = p_type;
 402 //      message->param.setup.dtmf = 0;
 403         memcpy(&message->param.setup.dialinginfo, &p_dialinginfo, sizeof(struct dialing_info));
 404         memcpy(&message->param.setup.callerinfo, &p_callerinfo, sizeof(struct caller_info));
 405         memcpy(&message->param.setup.capainfo, &p_capainfo, sizeof(struct capa_info));
 406         SCPY((char *)message->param.setup.useruser.data, (char *)mncc->useruser.info);
 407         message->param.setup.useruser.len = strlen(mncc->useruser.info);
 408         message->param.setup.useruser.protocol = mncc->useruser.proto;
 409         message_put(message);
 410 }
 411
 412 /*
 413  * BSC sends message to port
 414  */
 415 static int message_bsc(struct gsm_network *net, int msg_type, void *arg)
 416 {
 417         struct gsm_mncc *mncc = (struct gsm_mncc *)arg;
 418         unsigned int callref = mncc->callref;
 419         class Port *port;
 420         class Pgsm_bs *pgsm_bs = NULL;
 421         char name[64];
 422         struct mISDNport *mISDNport;
 423
 424         /* Special messages */
 425         switch(msg_type) {
 426         }
 427
 428         /* find callref */
 429         callref = mncc->callref;
 430         port = port_first;
 431         while(port) {
 432                 if ((port->p_type & PORT_CLASS_GSM_MASK) == PORT_CLASS_GSM_BS) {
 433                         pgsm_bs = (class Pgsm_bs *)port;
 434                         if (pgsm_bs->p_m_g_callref == callref) {
 435                                 break;
 436                         }
 437                 }
 438                 port = port->next;
 439         }
 440
 441         if (msg_type == GSM_TCHF_FRAME) {
 442                 if (port) {
 443                         /* inject DTMF, if enabled */
 444                         if (pgsm_bs->p_m_g_dtmf) {
 445                                 unsigned char data[160];
 446                                 int i;
 447
 448                                 for (i = 0; i < 160; i++) {
 449                                         data[i] = pgsm_bs->p_m_g_dtmf[pgsm_bs->p_m_g_dtmf_index++];
 450                                         if (pgsm_bs->p_m_g_dtmf_index == 8000)
 451                                                 pgsm_bs->p_m_g_dtmf_index = 0;
 452                                 }
 453                                 /* send */
 454                                 pgsm_bs->bchannel_send(PH_DATA_REQ, 0, data, 160);
 455                         } else
 456                                 pgsm_bs->frame_receive(arg);
 457                 }
 458                 return 0;
 459         }
 460
 461         if (!port) {
 462                 if (msg_type != MNCC_SETUP_IND)
 463                         return(0);
 464                 /* find gsm port */
 465                 mISDNport = mISDNport_first;
 466                 while(mISDNport) {
 467                         if (mISDNport->gsm_bs)
 468                                 break;
 469                         mISDNport = mISDNport->next;
 470                 }
 471                 if (!mISDNport) {
 472                         struct gsm_mncc *rej;
 473
 474                         rej = create_mncc(MNCC_REJ_REQ, callref);
 475                         rej->fields |= MNCC_F_CAUSE;
 476                         rej->cause.coding = 3;
 477                         rej->cause.location = 1;
 478                         rej->cause.value = 27;
 479                         gsm_trace_header(NULL, NULL, MNCC_REJ_REQ, DIRECTION_OUT);
 480                         add_trace("cause", "coding", "%d", rej->cause.coding);
 481                         add_trace("cause", "location", "%d", rej->cause.location);
 482                         add_trace("cause", "value", "%d", rej->cause.value);
 483                         end_trace();
 484                         send_and_free_mncc(gsm->network, rej->msg_type, rej);
 485                         return 0;
 486                 }
 487                 /* creating port object, transparent until setup with hdlc */
 488                 SPRINT(name, "%s-%d-in", mISDNport->ifport->interface->name, mISDNport->portnum);
 489                 if (!(pgsm_bs = new Pgsm_bs(PORT_TYPE_GSM_BS_IN, mISDNport, name, NULL, 0, 0, B_MODE_TRANSPARENT)))
 490
 491                         FATAL("Cannot create Port instance.\n");
 492         }
 493
 494         switch(msg_type) {
 495                 case MNCC_SETUP_IND:
 496                 pgsm_bs->setup_ind(msg_type, callref, mncc);
 497                 break;
 498
 499                 case MNCC_START_DTMF_IND:
 500                 pgsm_bs->start_dtmf_ind(msg_type, callref, mncc);
 501                 break;
 502
 503                 case MNCC_STOP_DTMF_IND:
 504                 pgsm_bs->stop_dtmf_ind(msg_type, callref, mncc);
 505                 break;
 506
 507                 case MNCC_CALL_CONF_IND:
 508                 pgsm_bs->call_conf_ind(msg_type, callref, mncc);
 509                 break;
 510
 511                 case MNCC_ALERT_IND:
 512                 pgsm_bs->alert_ind(msg_type, callref, mncc);
 513                 break;
 514
 515                 case MNCC_SETUP_CNF:
 516                 pgsm_bs->setup_cnf(msg_type, callref, mncc);
 517                 break;
 518
 519                 case MNCC_SETUP_COMPL_IND:
 520                 pgsm_bs->setup_compl_ind(msg_type, callref, mncc);
 521                 break;
 522
 523                 case MNCC_DISC_IND:
 524                 pgsm_bs->disc_ind(msg_type, callref, mncc);
 525                 break;
 526
 527                 case MNCC_REL_IND:
 528                 case MNCC_REL_CNF:
 529                 case MNCC_REJ_IND:
 530                 pgsm_bs->rel_ind(msg_type, callref, mncc);
 531                 break;
 532
 533                 case MNCC_NOTIFY_IND:
 534                 pgsm_bs->notify_ind(msg_type, callref, mncc);
 535                 break;
 536
 537                 case MNCC_HOLD_IND:
 538                 pgsm_bs->hold_ind(msg_type, callref, mncc);
 539                 break;
 540
 541                 case MNCC_RETRIEVE_IND:
 542                 pgsm_bs->retr_ind(msg_type, callref, mncc);
 543                 break;
 544
 545                 default:
 546                 PDEBUG(DEBUG_GSM, "Pgsm_bs(%s) gsm port with (caller id %s) received unhandled nessage: 0x%x\n", pgsm_bs->p_name, pgsm_bs->p_callerinfo.id, msg_type);
 547         }
 548         return(0);
 549 }
 550
 551 /* MESSAGE_SETUP */
 552 void Pgsm_bs::message_setup(unsigned int epoint_id, int message_id, union parameter *param)
 553 {
 554         struct lcr_msg *message;
 555         int ret;
 556         struct epoint_list *epointlist;
 557         struct gsm_mncc *mncc;
 558         int channel;
 559
 560         /* copy setup infos to port */
 561         memcpy(&p_callerinfo, &param->setup.callerinfo, sizeof(p_callerinfo));
 562         memcpy(&p_dialinginfo, &param->setup.dialinginfo, sizeof(p_dialinginfo));
 563         memcpy(&p_capainfo, &param->setup.capainfo, sizeof(p_capainfo));
 564         memcpy(&p_redirinfo, &param->setup.redirinfo, sizeof(p_redirinfo));
 565
 566         /* no number */
 567         if (!p_dialinginfo.id[0]) {
 568                 gsm_trace_header(p_m_mISDNport, this, MNCC_SETUP_REQ, DIRECTION_OUT);
 569                 add_trace("failure", NULL, "No dialed subscriber given.");
 570                 end_trace();
 571                 message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 572                 message->param.disconnectinfo.cause = 28;
 573                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 574                 message_put(message);
 575                 new_state(PORT_STATE_RELEASE);
 576                 trigger_work(&p_m_g_delete);
 577                 return;
 578         }
 579
 580         /* release if port is blocked */
 581         if (p_m_mISDNport->ifport->block) {
 582                 gsm_trace_header(p_m_mISDNport, this, MNCC_SETUP_REQ, DIRECTION_OUT);
 583                 add_trace("failure", NULL, "Port blocked.");
 584                 end_trace();
 585                 message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 586                 message->param.disconnectinfo.cause = 27; // temp. unavail.
 587                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 588                 message_put(message);
 589                 new_state(PORT_STATE_RELEASE);
 590                 trigger_work(&p_m_g_delete);
 591                 return;
 592         }
 593
 594         /* hunt channel */
 595         ret = channel = hunt_bchannel();
 596         if (ret < 0)
 597                 goto no_channel;
 598         /* open channel */
 599         ret = seize_bchannel(channel, 1);
 600         if (ret < 0) {
 601                 no_channel:
 602                 gsm_trace_header(p_m_mISDNport, this, MNCC_SETUP_REQ, DIRECTION_OUT);
 603                 add_trace("failure", NULL, "No internal audio channel available.");
 604                 end_trace();
 605                 message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 606                 message->param.disconnectinfo.cause = 34;
 607                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 608                 message_put(message);
 609                 new_state(PORT_STATE_RELEASE);
 610                 trigger_work(&p_m_g_delete);
 611                 return;
 612         }
 613         bchannel_event(p_m_mISDNport, p_m_b_index, B_EVENT_USE);
 614         if (bchannel_open(p_m_b_index))
 615                 goto no_channel;
 616
 617 //              SCPY(&p_m_tones_dir, param->setup.ext.tones_dir);
 618         /* screen outgoing caller id */
 619         do_screen(1, p_callerinfo.id, sizeof(p_callerinfo.id), &p_callerinfo.ntype, &p_callerinfo.present, p_m_mISDNport->ifport->interface);
 620
 621         /* attach only if not already */
 622         epointlist = p_epointlist;
 623         while(epointlist) {
 624                 if (epointlist->epoint_id == epoint_id)
 625                         break;
 626                 epointlist = epointlist->next;
 627         }
 628         if (!epointlist)
 629                 epointlist_new(epoint_id);
 630
 631         /* creating l3id */
 632         l1l2l3_trace_header(p_m_mISDNport, this, L3_NEW_L3ID_REQ, DIRECTION_OUT);
 633         p_m_g_callref = new_callref++;
 634         add_trace("callref", "new", "0x%x", p_m_g_callref);
 635         end_trace();
 636
 637         gsm_trace_header(p_m_mISDNport, this, MNCC_SETUP_REQ, DIRECTION_OUT);
 638         mncc = create_mncc(MNCC_SETUP_REQ, p_m_g_callref);
 639         /* caller information */
 640         mncc->fields |= MNCC_F_CALLING;
 641         mncc->calling.plan = 1;
 642         switch (p_callerinfo.ntype) {
 643                 case INFO_NTYPE_UNKNOWN:
 644                 mncc->calling.type = 0x0;
 645                 break;
 646                 case INFO_NTYPE_INTERNATIONAL:
 647                 mncc->calling.type = 0x1;
 648                 break;
 649                 case INFO_NTYPE_NATIONAL:
 650                 mncc->calling.type = 0x2;
 651                 break;
 652                 case INFO_NTYPE_SUBSCRIBER:
 653                 mncc->calling.type = 0x4;
 654                 break;
 655                 default: /* INFO_NTYPE_NOTPRESENT */
 656                 mncc->fields &= ~MNCC_F_CALLING;
 657                 break;
 658         }
 659         switch (p_callerinfo.screen) {
 660                 case INFO_SCREEN_USER:
 661                 mncc->calling.screen = 0;
 662                 break;
 663                 default: /* INFO_SCREEN_NETWORK */
 664                 mncc->calling.screen = 3;
 665                 break;
 666         }
 667         switch (p_callerinfo.present) {
 668                 case INFO_PRESENT_ALLOWED:
 669                 mncc->calling.present = 0;
 670                 break;
 671                 case INFO_PRESENT_RESTRICTED:
 672                 mncc->calling.present = 1;
 673                 break;
 674                 default: /* INFO_PRESENT_NOTAVAIL */
 675                 mncc->calling.present = 2;
 676                 break;
 677         }
 678         if (mncc->fields & MNCC_F_CALLING) {
 679                 SCPY(mncc->calling.number, p_callerinfo.id);
 680                 add_trace("calling", "type", "%d", mncc->calling.type);
 681                 add_trace("calling", "plan", "%d", mncc->calling.plan);
 682                 add_trace("calling", "present", "%d", mncc->calling.present);
 683                 add_trace("calling", "screen", "%d", mncc->calling.screen);
 684                 add_trace("calling", "number", "%s", mncc->calling.number);
 685         }
 686         /* dialing information */
 687         mncc->fields |= MNCC_F_CALLED;
 688         if (!strncmp(p_dialinginfo.id, "imsi-", 5)) {
 689                 SCPY(mncc->imsi, p_dialinginfo.id+5);
 690                 add_trace("dialing", "imsi", "%s", mncc->imsi);
 691         } else {
 692                 SCPY(mncc->called.number, p_dialinginfo.id);
 693                 add_trace("dialing", "number", "%s", mncc->called.number);
 694         }
 695
 696         /* sending user-user */
 697
 698         /* redirecting number */
 699         mncc->fields |= MNCC_F_REDIRECTING;
 700         mncc->redirecting.plan = 1;
 701         switch (p_redirinfo.ntype) {
 702                 case INFO_NTYPE_UNKNOWN:
 703                 mncc->redirecting.type = 0x0;
 704                 break;
 705                 case INFO_NTYPE_INTERNATIONAL:
 706                 mncc->redirecting.type = 0x1;
 707                 break;
 708                 case INFO_NTYPE_NATIONAL:
 709                 mncc->redirecting.type = 0x2;
 710                 break;
 711                 case INFO_NTYPE_SUBSCRIBER:
 712                 mncc->redirecting.type = 0x4;
 713                 break;
 714                 default: /* INFO_NTYPE_NOTPRESENT */
 715                 mncc->fields &= ~MNCC_F_REDIRECTING;
 716                 break;
 717         }
 718         switch (p_redirinfo.screen) {
 719                 case INFO_SCREEN_USER:
 720                 mncc->redirecting.screen = 0;
 721                 break;
 722                 default: /* INFO_SCREE_NETWORK */
 723                 mncc->redirecting.screen = 3;
 724                 break;
 725         }
 726         switch (p_redirinfo.present) {
 727                 case INFO_PRESENT_ALLOWED:
 728                 mncc->redirecting.present = 0;
 729                 break;
 730                 case INFO_PRESENT_RESTRICTED:
 731                 mncc->redirecting.present = 1;
 732                 break;
 733                 default: /* INFO_PRESENT_NOTAVAIL */
 734                 mncc->redirecting.present = 2;
 735                 break;
 736         }
 737         /* sending redirecting number only in ntmode */
 738         if (mncc->fields & MNCC_F_REDIRECTING) {
 739                 SCPY(mncc->redirecting.number, p_redirinfo.id);
 740                 add_trace("redir", "type", "%d", mncc->redirecting.type);
 741                 add_trace("redir", "plan", "%d", mncc->redirecting.plan);
 742                 add_trace("redir", "present", "%d", mncc->redirecting.present);
 743                 add_trace("redir", "screen", "%d", mncc->redirecting.screen);
 744                 add_trace("redir", "number", "%s", mncc->redirecting.number);
 745         }
 746         /* bearer capability */
 747         //todo
 748
 749         end_trace();
 750         send_and_free_mncc(p_m_g_instance, mncc->msg_type, mncc);
 751
 752         new_state(PORT_STATE_OUT_SETUP);
 753
 754         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
 755         message_put(message);
 756
 757         new_state(PORT_STATE_OUT_PROCEEDING);
 758 }
 759
 760 /*
 761  * endpoint sends messages to the port
 762  */
 763 int Pgsm_bs::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
 764 {
 765         if (Pgsm::message_epoint(epoint_id, message_id, param))
 766                 return(1);
 767
 768         switch(message_id) {
 769                 case MESSAGE_SETUP: /* dial-out command received from epoint */
 770                 if (p_state!=PORT_STATE_IDLE)
 771                         break;
 772                 message_setup(epoint_id, message_id, param);
 773                 break;
 774
 775                 default:
 776                 PDEBUG(DEBUG_GSM, "Pgsm_bs(%s) gsm port with (caller id %s) received unhandled nessage: %d\n", p_name, p_callerinfo.id, message_id);
 777         }
 778
 779         return(1);
 780 }
 781
 782 int gsm_bs_exit(int rc)
 783 {
 784 #if 0
 785         /* free gsm instance */
 786         if (gsm) {
 787                 /* shutdown network */
 788                 if (gsm->network)
 789                         bsc_shutdown_net((struct gsm_network *)gsm->network);
 790                 /* free network */
 791 //              if (gsm->network) {
 792 //                      free((struct gsm_network *)gsm->network); /* TBD */
 793 //              }
 794         }
 795 #endif
 796         return(rc);
 797 }
 798
 799 extern "C" {
 800
 801 static int mncc_q_enqueue(struct gsm_mncc *mncc, unsigned int len)
 802 {
 803         struct mncc_q_entry *qe;
 804
 805         qe = (struct mncc_q_entry *) MALLOC(sizeof(*qe)+sizeof(*mncc)+len);
 806         if (!qe)
 807                 return -ENOMEM;
 808
 809         qe->next = NULL;
 810         qe->len = len;
 811         memcpy(qe->data, mncc, len);
 812
 813         /* in case of empty list ... */
 814         if (!gsm->mncc_q_hd && !gsm->mncc_q_tail) {
 815                 /* the list head and tail both point to the new qe */
 816                 gsm->mncc_q_hd = gsm->mncc_q_tail = qe;
 817         } else {
 818                 /* append to tail of list */
 819                 gsm->mncc_q_tail->next = qe;
 820                 gsm->mncc_q_tail = qe;
 821         }
 822
 823         gsm->mncc_lfd.when |= LCR_FD_WRITE;
 824
 825         return 0;
 826 }
 827
 828 static struct mncc_q_entry *mncc_q_dequeue(void)
 829 {
 830         struct mncc_q_entry *qe = gsm->mncc_q_hd;
 831         if (!qe)
 832                 return NULL;
 833
 834         /* dequeue the successfully sent message */
 835         gsm->mncc_q_hd = qe->next;
 836         if (!qe)
 837                 return NULL;
 838         if (qe == gsm->mncc_q_tail)
 839                 gsm->mncc_q_tail = NULL;
 840
 841         return qe;
 842 }
 843
 844 /* routine called by LCR code if it wants to send a message to OpenBSC */
 845 int mncc_send(struct gsm_network *instance, int msg_type, void *data)
 846 {
 847         int len = 0;
 848
 849         /* FIXME: the caller should provide this */
 850         switch (msg_type) {
 851         case GSM_TCHF_FRAME:
 852                 len = sizeof(struct gsm_data_frame) + 33;
 853                 break;
 854         default:
 855                 len = sizeof(struct gsm_mncc);
 856                 break;
 857         }
 858
 859         return mncc_q_enqueue((struct gsm_mncc *)data, len);
 860 }
 861
 862 } // extern "C"
 863
 864 /* close MNCC socket */
 865 static int mncc_fd_close(struct lcr_fd *lfd)
 866 {
 867         class Port *port;
 868         class Pgsm_bs *pgsm_bs = NULL;
 869         struct lcr_msg *message;
 870
 871         PERROR("Lost MNCC socket, retrying in %u seconds\n", SOCKET_RETRY_TIMER);
 872         close(lfd->fd);
 873         unregister_fd(lfd);
 874         lfd->fd = -1;
 875
 876         /* free all the calls that were running through the MNCC interface */
 877         port = port_first;
 878         while(port) {
 879                 if ((port->p_type & PORT_CLASS_GSM_MASK) == PORT_CLASS_GSM_BS) {
 880                         pgsm_bs = (class Pgsm_bs *)port;
 881                         message = message_create(pgsm_bs->p_serial, ACTIVE_EPOINT(pgsm_bs->p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
 882                         message->param.disconnectinfo.cause = 27; // temp. unavail.
 883                         message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 884                         message_put(message);
 885                         pgsm_bs->new_state(PORT_STATE_RELEASE);
 886                         trigger_work(&pgsm_bs->p_m_g_delete);
 887                 }
 888                 port = port->next;
 889         }
 890
 891         /* flush the queue */
 892         while (mncc_q_dequeue())
 893                 ;
 894
 895         /* start the re-connect timer */
 896         schedule_timer(&gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
 897
 898         generate_dtmf();
 899
 900         return 0;
 901 }
 902
 903 /* read from OpenBSC via MNCC socket */
 904 static int mncc_fd_write(struct lcr_fd *lfd, void *inst, int idx)
 905 {
 906         struct mncc_q_entry *qe, *qe2;
 907         int rc;
 908
 909         while (1) {
 910                 qe = gsm->mncc_q_hd;
 911                 if (!qe) {
 912                         lfd->when &= ~LCR_FD_WRITE;
 913                         break;
 914                 }
 915                 rc = write(lfd->fd, qe->data, qe->len);
 916                 if (rc == 0)
 917                         return mncc_fd_close(lfd);
 918                 if (rc < 0)
 919                         return rc;
 920                 if (rc < qe->len)
 921                         return -1;
 922                 /* dequeue the successfully sent message */
 923                 qe2 = mncc_q_dequeue();
 924                 assert(qe == qe2);
 925                 free(qe);
 926         }
 927         return 0;
 928 }
 929
 930 /* read from OpenBSC via MNCC socket */
 931 static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
 932 {
 933         int rc;
 934         static char buf[sizeof(struct gsm_mncc)+1024];
 935         struct gsm_mncc *mncc_prim = (struct gsm_mncc *) buf;
 936
 937         memset(buf, 0, sizeof(buf));
 938         rc = recv(lfd->fd, buf, sizeof(buf), 0);
 939         if (rc == 0)
 940                 return mncc_fd_close(lfd);
 941         if (rc < 0)
 942                 return rc;
 943
 944         /* Hand the MNCC message into LCR */
 945         return message_bsc(NULL, mncc_prim->msg_type, mncc_prim);
 946 }
 947
 948 /* file descriptor callback if we can read or write form MNCC socket */
 949 static int mncc_fd_cb(struct lcr_fd *lfd, unsigned int what, void *instance, int idx)
 950 {
 951         int rc = 0;
 952
 953         if (what & LCR_FD_READ)
 954                 rc = mncc_fd_read(lfd, instance, idx);
 955         if (rc < 0)
 956                 return rc;
 957
 958         if (what & LCR_FD_WRITE)
 959                 rc = mncc_fd_write(lfd, instance, idx);
 960
 961         return rc;
 962 }
 963
 964 static int socket_retry_cb(struct lcr_timer *timer, void *instance, int index)
 965 {
 966         int fd, rc;
 967
 968         fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
 969         if (fd < 0) {
 970                 PERROR("Cannot create SEQPACKET socket, giving up!\n");
 971                 return fd;
 972         }
 973
 974         rc = connect(fd, (struct sockaddr *) &gsm->sun,
 975                      sizeof(gsm->sun));
 976         if (rc < 0) {
 977                 PERROR("Could not connect to MNCC socket, "
 978                         "retrying in %u seconds\n", SOCKET_RETRY_TIMER);
 979                 close(fd);
 980                 schedule_timer(&gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
 981         } else {
 982                 PDEBUG(DEBUG_GSM, "Connected to MNCC socket!\n");
 983                 gsm->mncc_lfd.fd = fd;
 984                 register_fd(&gsm->mncc_lfd, LCR_FD_READ, &mncc_fd_cb, NULL, 0);
 985         }
 986
 987         return 0;
 988 }
 989
 990 int gsm_bs_init(void)
 991 {
 992         gsm->sun.sun_family = AF_UNIX;
 993         strcpy(gsm->sun.sun_path, "/tmp/bsc_mncc");
 994
 995         memset(&gsm->socket_retry, 0, sizeof(gsm->socket_retry));
 996         add_timer(&gsm->socket_retry, socket_retry_cb, NULL, 0);
 997
 998         /* do the initial connect */
 999         socket_retry_cb(&gsm->socket_retry, NULL, 0);
1000
1001         return 0;
1002 }