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 "mncc.h"
  14
  15 struct lcr_gsm *gsm_bs = NULL;
  16
  17 #define PAYLOAD_TYPE_GSM 3
  18
  19 /*
  20  * DTMF stuff
  21  */
  22 unsigned char dtmf_samples[16][8000];
  23 static int dtmf_x[4] = { 1209, 1336, 1477, 1633 };
  24 static int dtmf_y[4] = { 697, 770, 852, 941 };
  25
  26 void generate_dtmf(void)
  27 {
  28         double fx, fy, sample;
  29         int i, x, y;
  30         unsigned char *law;
  31
  32         for (y = 0; y < 4; y++) {
  33                 fy = 2 * 3.1415927 * ((double)dtmf_y[y]) / 8000.0;
  34                 for (x = 0; x < 4; x++) {
  35                         fx = 2 * 3.1415927 * ((double)dtmf_x[x]) / 8000.0;
  36                         law = dtmf_samples[y << 2 | x];
  37                         for (i = 0; i < 8000; i++) {
  38                                 sample = sin(fy * ((double)i)) * 0.251 * 32767.0; /* -6 dB */
  39                                 sample += sin(fx * ((double)i)) * 0.158 * 32767.0; /* -8 dB */
  40                                 *law++ = audio_s16_to_law[(int)sample & 0xffff];
  41                         }
  42                 }
  43         }
  44 }
  45
  46
  47 /*
  48  * constructor
  49  */
  50 Pgsm_bs::Pgsm_bs(int type, char *portname, struct port_settings *settings, struct interface *interface) : Pgsm(type, portname, settings, interface)
  51 {
  52         p_g_lcr_gsm = gsm_bs;
  53         p_g_dtmf = NULL;
  54         p_g_dtmf_index = 0;
  55
  56         PDEBUG(DEBUG_GSM, "Created new GSMBSPort(%s).\n", portname);
  57 }
  58
  59 /*
  60  * destructor
  61  */
  62 Pgsm_bs::~Pgsm_bs()
  63 {
  64         PDEBUG(DEBUG_GSM, "Destroyed GSM BS process(%s).\n", p_name);
  65 }
  66
  67 static const char *media_type2name(unsigned char media_type) {
  68         switch (media_type) {
  69         case MEDIA_TYPE_ULAW:
  70                 return "PCMU";
  71         case MEDIA_TYPE_ALAW:
  72                 return "PCMA";
  73         case MEDIA_TYPE_GSM:
  74                 return "GSM";
  75         case MEDIA_TYPE_GSM_HR:
  76                 return "GSM-HR";
  77         case MEDIA_TYPE_GSM_EFR:
  78                 return "GSM-EFR";
  79         case MEDIA_TYPE_AMR:
  80                 return "AMR";
  81         }
  82
  83         return "UKN";
  84 }
  85
  86 /* PROCEEDING INDICATION (from MS) */
  87 void Pgsm_bs::call_conf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
  88 {
  89         int media_types[8];
  90         unsigned char payload_types[8];
  91         int payloads = 0;
  92
  93         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
  94         if (mncc->fields & MNCC_F_CAUSE) {
  95                 add_trace("cause", "coding", "%d", mncc->cause.coding);
  96                 add_trace("cause", "location", "%", mncc->cause.location);
  97                 add_trace("cause", "value", "%", mncc->cause.value);
  98         }
  99         end_trace();
 100
 101         new_state(PORT_STATE_OUT_PROCEEDING);
 102
 103         /* get list of offered payload types
 104          * if list ist empty, the FR V1 is selected */
 105         select_payload_type(mncc, payload_types, media_types, &payloads, sizeof(payload_types));
 106         /* if no given payload type is supported, we assume  */
 107         if (!payloads) {
 108                 media_types[0] = MEDIA_TYPE_GSM;
 109                 payload_types[0] = PAYLOAD_TYPE_GSM;
 110                 payloads = 1;
 111         }
 112
 113         /* select first payload type that matches the rtp list */
 114         if (p_g_rtp_bridge) {
 115                 int i, j;
 116
 117                 for (i = 0; i < p_g_rtp_payloads; i++) {
 118                         for (j = 0; j < payloads; j++) {
 119                                 if (p_g_rtp_media_types[i] == media_types[j])
 120                                         break;
 121                         }
 122                         if (j < payloads)
 123                                 break;
 124                 }
 125                 if (i == p_g_rtp_payloads) {
 126                         struct lcr_msg *message;
 127
 128                         /* payload offered by remote RTP is not supported */
 129                         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
 130                         message->param.disconnectinfo.cause = 65;
 131                         message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 132                         message_put(message);
 133                         /* send release */
 134                         mncc = create_mncc(MNCC_REL_REQ, p_g_callref);
 135                         gsm_trace_header(p_g_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
 136                         mncc->fields |= MNCC_F_CAUSE;
 137                         mncc->cause.coding = 3;
 138                         mncc->cause.location = LOCATION_PRIVATE_LOCAL;
 139                         mncc->cause.value = 65;
 140                         add_trace("cause", "coding", "%d", mncc->cause.coding);
 141                         add_trace("cause", "location", "%d", mncc->cause.location);
 142                         add_trace("cause", "value", "%d", mncc->cause.value);
 143                         add_trace("reason", NULL, "None of the payload types are supported by MS");
 144                         end_trace();
 145                         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 146                         new_state(PORT_STATE_RELEASE);
 147                         trigger_work(&p_g_delete);
 148
 149                         return;
 150                 }
 151                 modify_lchan(p_g_rtp_media_types[i]);
 152                 /* use the payload type from received rtp list, not from locally generated payload types */
 153                 p_g_payload_type = p_g_rtp_payload_types[i];
 154         } else {
 155                 /* modify to first given payload */
 156                 modify_lchan(media_types[0]);
 157                 p_g_payload_type = payload_types[0];
 158         }
 159 }
 160
 161 /* DTMF INDICATION */
 162 void Pgsm_bs::start_dtmf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 163 {
 164         struct gsm_mncc *resp;
 165
 166         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 167         add_trace("keypad", NULL, "%c", mncc->keypad);
 168         end_trace();
 169         SPRINT(p_dialinginfo.id, "%c", mncc->keypad);
 170         p_dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
 171
 172         /* send resp */
 173         gsm_trace_header(p_g_interface_name, this, MNCC_START_DTMF_RSP, DIRECTION_OUT);
 174         add_trace("keypad", NULL, "%c", mncc->keypad);
 175         end_trace();
 176         resp = create_mncc(MNCC_START_DTMF_RSP, p_g_callref);
 177         resp->fields |= MNCC_F_KEYPAD;
 178         resp->keypad = mncc->keypad;
 179         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 180
 181         if (p_g_rtp_bridge) {
 182                 class Port *remote = bridge_remote();
 183
 184                 if (remote) {
 185                         struct lcr_msg *message;
 186
 187                         /* send dtmf information, because we bridge RTP directly */
 188                         message = message_create(0, remote->p_serial, EPOINT_TO_PORT, MESSAGE_DTMF);
 189                         message->param.dtmf = mncc->keypad;
 190                         message_put(message);
 191                 }
 192         } else {
 193                 /* generate DTMF tones, since we do audio forwarding inside LCR */
 194                 switch (mncc->keypad) {
 195                         case '1': p_g_dtmf = dtmf_samples[0]; break;
 196                         case '2': p_g_dtmf = dtmf_samples[1]; break;
 197                         case '3': p_g_dtmf = dtmf_samples[2]; break;
 198                         case 'a':
 199                         case 'A': p_g_dtmf = dtmf_samples[3]; break;
 200                         case '4': p_g_dtmf = dtmf_samples[4]; break;
 201                         case '5': p_g_dtmf = dtmf_samples[5]; break;
 202                         case '6': p_g_dtmf = dtmf_samples[6]; break;
 203                         case 'b':
 204                         case 'B': p_g_dtmf = dtmf_samples[7]; break;
 205                         case '7': p_g_dtmf = dtmf_samples[8]; break;
 206                         case '8': p_g_dtmf = dtmf_samples[9]; break;
 207                         case '9': p_g_dtmf = dtmf_samples[10]; break;
 208                         case 'c':
 209                         case 'C': p_g_dtmf = dtmf_samples[11]; break;
 210                         case '*': p_g_dtmf = dtmf_samples[12]; break;
 211                         case '0': p_g_dtmf = dtmf_samples[13]; break;
 212                         case '#': p_g_dtmf = dtmf_samples[14]; break;
 213                         case 'd':
 214                         case 'D': p_g_dtmf = dtmf_samples[15]; break;
 215                 }
 216                 p_g_dtmf_index = 0;
 217         }
 218 }
 219 void Pgsm_bs::stop_dtmf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 220 {
 221         struct gsm_mncc *resp;
 222
 223         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 224         add_trace("keypad", NULL, "%c", mncc->keypad);
 225         end_trace();
 226
 227         /* send resp */
 228         gsm_trace_header(p_g_interface_name, this, MNCC_STOP_DTMF_RSP, DIRECTION_OUT);
 229         add_trace("keypad", NULL, "%c", mncc->keypad);
 230         end_trace();
 231         resp = create_mncc(MNCC_STOP_DTMF_RSP, p_g_callref);
 232         resp->keypad = mncc->keypad;
 233         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 234
 235         /* stop DTMF */
 236         p_g_dtmf = NULL;
 237 }
 238
 239 /* HOLD INDICATION */
 240 void Pgsm_bs::hold_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 241 {
 242         struct lcr_msg *message;
 243         struct gsm_mncc *resp, *frame;
 244
 245         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 246         end_trace();
 247
 248         /* notify the hold of call */
 249         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 250         message->param.notifyinfo.notify = INFO_NOTIFY_REMOTE_HOLD;
 251         message->param.notifyinfo.local = 1; /* call is held by supplementary service */
 252         message_put(message);
 253
 254         /* acknowledge hold */
 255         gsm_trace_header(p_g_interface_name, this, MNCC_HOLD_CNF, DIRECTION_OUT);
 256         end_trace();
 257         resp = create_mncc(MNCC_HOLD_CNF, p_g_callref);
 258         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 259
 260         /* disable audio */
 261         if (p_g_tch_connected) { /* it should be true */
 262                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_DROP, DIRECTION_OUT);
 263                 end_trace();
 264                 frame = create_mncc(MNCC_FRAME_DROP, p_g_callref);
 265                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 266                 p_g_tch_connected = 0;
 267         }
 268 }
 269
 270
 271 /* RETRIEVE INDICATION */
 272 void Pgsm_bs::retr_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 273 {
 274         struct lcr_msg *message;
 275         struct gsm_mncc *resp, *frame;
 276
 277         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 278         end_trace();
 279
 280         /* notify the retrieve of call */
 281         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 282         message->param.notifyinfo.notify = INFO_NOTIFY_REMOTE_RETRIEVAL;
 283         message->param.notifyinfo.local = 1; /* call is retrieved by supplementary service */
 284         message_put(message);
 285
 286         /* acknowledge retr */
 287         gsm_trace_header(p_g_interface_name, this, MNCC_RETRIEVE_CNF, DIRECTION_OUT);
 288         end_trace();
 289         resp = create_mncc(MNCC_RETRIEVE_CNF, p_g_callref);
 290         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 291
 292         /* enable audio */
 293         if (!p_g_tch_connected) { /* it should be true */
 294                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 295                 end_trace();
 296                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 297                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 298                 p_g_tch_connected = 1;
 299         }
 300 }
 301
 302 /*
 303  * select payload type by given list or GSM V1 FR
 304  * return the payload type or 0 if not given
 305  */
 306
 307 void Pgsm_bs::select_payload_type(struct gsm_mncc *mncc, unsigned char *payload_types, int *media_types, int *payloads, int max_payloads)
 308 {
 309         int media_type;
 310         unsigned char payload_type;
 311
 312         *payloads = 0;
 313
 314         gsm_trace_header(p_g_interface_name, this, 1 /* codec negotioation */, DIRECTION_NONE);
 315         if ((mncc->fields & MNCC_F_BEARER_CAP)) {
 316                 /* select preferred payload type from list */
 317                 int i;
 318                 unsigned char dynamic_type = 96;
 319
 320                 add_trace("bearer", "capa", "given by MS");
 321                 for (i = 0; mncc->bearer_cap.speech_ver[i] >= 0; i++) {
 322                         /* select payload type we support */
 323                         switch (mncc->bearer_cap.speech_ver[i]) {
 324                         case 0:
 325                                 add_trace("speech", "version", "Full Rate given");
 326                                 media_type = MEDIA_TYPE_GSM;
 327                                 payload_type = PAYLOAD_TYPE_GSM;
 328                                 break;
 329                         case 2:
 330                                 add_trace("speech", "version", "EFR given");
 331                                 media_type = MEDIA_TYPE_GSM_EFR;
 332                                 payload_type = dynamic_type++;
 333                                 break;
 334                         case 4:
 335                                 add_trace("speech", "version", "AMR given");
 336                                 media_type = MEDIA_TYPE_AMR;
 337                                 payload_type = dynamic_type++;
 338                                 break;
 339                         case 1:
 340                                 add_trace("speech", "version", "Half Rate given");
 341                                 media_type = MEDIA_TYPE_GSM_HR;
 342                                 payload_type = dynamic_type++;
 343                                 break;
 344                         case 5:
 345                                 add_trace("speech", "version", "AMR Half Rate given");
 346                                 media_type = MEDIA_TYPE_AMR;
 347                                 payload_type = dynamic_type++;
 348                                 break;
 349                         default:
 350                                 add_trace("speech", "version", "%d given", mncc->bearer_cap.speech_ver[i]);
 351                                 media_type = 0;
 352                                 payload_type = 0;
 353                         }
 354                         /* wen don't support it, so we check the next */
 355                         if (!media_type) {
 356                                 add_trace("speech", "ignored", "Not supported by LCR");
 357                                 continue;
 358                         }
 359                         if (!p_g_rtp_bridge) {
 360                                 if (media_type != MEDIA_TYPE_GSM) {
 361                                         add_trace("speech", "ignored", "Not suitable for LCR");
 362                                         continue;
 363                                 }
 364                         }
 365                         if (*payloads <= max_payloads) {
 366                                 media_types[*payloads] = media_type;
 367                                 payload_types[*payloads] = payload_type;
 368                                 (*payloads)++;
 369                         }
 370                 }
 371         } else {
 372                 add_trace("bearer", "capa", "not given by MS");
 373                 add_trace("speech", "version", "Full Rate given");
 374                 media_types[0] = MEDIA_TYPE_GSM;
 375                 payload_types[0] = PAYLOAD_TYPE_GSM;
 376                 *payloads = 1;
 377         }
 378         if (!(*payloads))
 379                 add_trace("error", "", "All given payload types unsupported");
 380         end_trace();
 381 }
 382
 383 /*
 384  * handles all indications
 385  */
 386 /* SETUP INDICATION */
 387 void Pgsm_bs::setup_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 388 {
 389         class Endpoint *epoint;
 390         struct lcr_msg *message;
 391         struct gsm_mncc *proceeding, *frame;
 392         struct interface *interface;
 393         int media_types[8];
 394         unsigned char payload_types[8];
 395         int payloads = 0;
 396
 397         interface = getinterfacebyname(p_g_interface_name);
 398         if (!interface) {
 399                 PERROR("Cannot find interface %s.\n", p_g_interface_name);
 400                 return;
 401         }
 402
 403         /* process given callref */
 404         gsm_trace_header(p_g_interface_name, this, 0, DIRECTION_IN);
 405         add_trace("callref", "new", "0x%x", callref);
 406         if (p_g_callref) {
 407                 /* release in case the ID is already in use */
 408                 add_trace("error", NULL, "callref already in use");
 409                 end_trace();
 410                 mncc = create_mncc(MNCC_REJ_REQ, callref);
 411                 gsm_trace_header(p_g_interface_name, this, MNCC_REJ_REQ, DIRECTION_OUT);
 412                 mncc->fields |= MNCC_F_CAUSE;
 413                 mncc->cause.coding = 3;
 414                 mncc->cause.location = 1;
 415                 mncc->cause.value = 47;
 416                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 417                 add_trace("cause", "location", "%d", mncc->cause.location);
 418                 add_trace("cause", "value", "%d", mncc->cause.value);
 419                 add_trace("reason", NULL, "callref already in use");
 420                 end_trace();
 421                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 422                 new_state(PORT_STATE_RELEASE);
 423                 trigger_work(&p_g_delete);
 424                 return;
 425         }
 426         p_g_callref = callref;
 427         end_trace();
 428
 429         /* caller info */
 430         if (mncc->clir.inv)
 431                 p_callerinfo.present = INFO_PRESENT_RESTRICTED;
 432         else
 433                 p_callerinfo.present = INFO_PRESENT_ALLOWED;
 434         if (mncc->calling.number[0])
 435                 SCPY(p_callerinfo.id, mncc->calling.number);
 436         else
 437                 p_callerinfo.present = INFO_PRESENT_NOTAVAIL;
 438         SCPY(p_callerinfo.imsi, mncc->imsi);
 439         p_callerinfo.screen = INFO_SCREEN_NETWORK;
 440         p_callerinfo.ntype = INFO_NTYPE_UNKNOWN;
 441         SCPY(p_callerinfo.interface, p_g_interface_name);
 442
 443         /* dialing information */
 444         SCAT(p_dialinginfo.id, mncc->called.number);
 445         switch (mncc->called.type) {
 446                 case 0x1:
 447                 p_dialinginfo.ntype = INFO_NTYPE_INTERNATIONAL;
 448                 break;
 449                 case 0x2:
 450                 p_dialinginfo.ntype = INFO_NTYPE_NATIONAL;
 451                 break;
 452                 case 0x4:
 453                 p_dialinginfo.ntype = INFO_NTYPE_SUBSCRIBER;
 454                 break;
 455                 default:
 456                 p_dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
 457                 break;
 458         }
 459         if (mncc->emergency) {
 460                 SCPY(p_dialinginfo.id, "emergency");
 461         }
 462         p_dialinginfo.sending_complete = 1;
 463
 464         /* bearer capability */
 465         p_capainfo.bearer_capa = INFO_BC_SPEECH;
 466         p_capainfo.bearer_info1 = (options.law=='a')?3:2;
 467         p_capainfo.bearer_mode = INFO_BMODE_CIRCUIT;
 468         p_capainfo.source_mode = B_MODE_TRANSPARENT;
 469         p_g_mode = p_capainfo.source_mode;
 470
 471         /* get list of offered payload types
 472          * if list ist empty, the FR V1 is selected */
 473         select_payload_type(mncc, payload_types, media_types, &payloads, sizeof(payload_types));
 474         /* if no given payload type is supported, we assume  */
 475         if (!payloads) {
 476                 media_types[0] = MEDIA_TYPE_GSM;
 477                 payload_types[0] = PAYLOAD_TYPE_GSM;
 478                 payloads = 1;
 479         }
 480 #if 0
 481         /* if no given payload type is supported, we reject the call */
 482         if (!payloads) {
 483                 mncc = create_mncc(MNCC_REJ_REQ, callref);
 484                 gsm_trace_header(p_g_interface_name, this, MNCC_REJ_REQ, DIRECTION_OUT);
 485                 mncc->fields |= MNCC_F_CAUSE;
 486                 mncc->cause.coding = 3;
 487                 mncc->cause.location = 1;
 488                 mncc->cause.value = 65;
 489                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 490                 add_trace("cause", "location", "%d", mncc->cause.location);
 491                 add_trace("cause", "value", "%d", mncc->cause.value);
 492                 add_trace("reason", NULL, "Given speech codec(s) not supported");
 493                 end_trace();
 494                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 495                 new_state(PORT_STATE_RELEASE);
 496                 trigger_work(&p_g_delete);
 497                 return;
 498         }
 499 #endif
 500
 501         /* useruser */
 502
 503         /* what infos did we got ... */
 504         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 505         if (p_callerinfo.id[0])
 506                 add_trace("calling", "number", "%s", p_callerinfo.id);
 507         else
 508                 SPRINT(p_callerinfo.id, "imsi-%s", p_callerinfo.imsi);
 509         add_trace("calling", "imsi", "%s", p_callerinfo.imsi);
 510         add_trace("dialing", "number", "%s", p_dialinginfo.id);
 511         end_trace();
 512
 513         /* create endpoint */
 514         if (p_epointlist)
 515                 FATAL("Incoming call but already got an endpoint.\n");
 516         if (!(epoint = new Endpoint(p_serial, 0)))
 517                 FATAL("No memory for Endpoint instance\n");
 518         epoint->ep_app = new_endpointapp(epoint, 0, interface->app); //incoming
 519         epointlist_new(epoint->ep_serial);
 520
 521         /* modify lchan in case of no rtp bridge */
 522         if (!p_g_rtp_bridge)
 523                 modify_lchan(media_types[0]);
 524
 525         /* send call proceeding */
 526         gsm_trace_header(p_g_interface_name, this, MNCC_CALL_PROC_REQ, DIRECTION_OUT);
 527         proceeding = create_mncc(MNCC_CALL_PROC_REQ, p_g_callref);
 528         if (p_g_tones) {
 529                 proceeding->fields |= MNCC_F_PROGRESS;
 530                 proceeding->progress.coding = 3; /* GSM */
 531                 proceeding->progress.location = 1;
 532                 proceeding->progress.descr = 8;
 533                 add_trace("progress", "coding", "%d", proceeding->progress.coding);
 534                 add_trace("progress", "location", "%d", proceeding->progress.location);
 535                 add_trace("progress", "descr", "%d", proceeding->progress.descr);
 536         }
 537         end_trace();
 538         send_and_free_mncc(p_g_lcr_gsm, proceeding->msg_type, proceeding);
 539
 540         new_state(PORT_STATE_IN_PROCEEDING);
 541
 542         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
 543                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 544                 end_trace();
 545                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 546                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 547                 p_g_tch_connected = 1;
 548         }
 549
 550         /* send setup message to endpoit */
 551         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_SETUP);
 552         message->param.setup.port_type = p_type;
 553 //      message->param.setup.dtmf = 0;
 554         memcpy(&message->param.setup.dialinginfo, &p_dialinginfo, sizeof(struct dialing_info));
 555         memcpy(&message->param.setup.callerinfo, &p_callerinfo, sizeof(struct caller_info));
 556         memcpy(&message->param.setup.capainfo, &p_capainfo, sizeof(struct capa_info));
 557         SCPY((char *)message->param.setup.useruser.data, (char *)mncc->useruser.info);
 558         message->param.setup.useruser.len = strlen(mncc->useruser.info);
 559         message->param.setup.useruser.protocol = mncc->useruser.proto;
 560         if (p_g_rtp_bridge) {
 561                 struct gsm_mncc_rtp *rtp;
 562                 int i;
 563
 564                 PDEBUG(DEBUG_GSM, "Request RTP peer info, before forwarding setup\n");
 565                 p_g_setup_pending = message;
 566                 rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CREATE, p_g_callref);
 567                 send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
 568
 569                 for (i = 0; i < (int)sizeof(message->param.setup.rtpinfo.payload_types) && i < payloads; i++) {
 570                         message->param.setup.rtpinfo.media_types[i] = media_types[i];
 571                         message->param.setup.rtpinfo.payload_types[i] = payload_types[i];
 572                         message->param.setup.rtpinfo.payloads++;
 573                 }
 574
 575         } else
 576                 message_put(message);
 577
 578 }
 579
 580 /*
 581  * BSC sends message to port
 582  */
 583 int message_bsc(struct lcr_gsm *lcr_gsm, int msg_type, void *arg)
 584 {
 585         struct gsm_mncc *mncc = (struct gsm_mncc *)arg;
 586         unsigned int callref = mncc->callref;
 587         class Port *port;
 588         class Pgsm_bs *pgsm_bs = NULL;
 589         char name[64];
 590 //      struct mISDNport *mISDNport;
 591
 592         /* Special messages */
 593         switch(msg_type) {
 594         }
 595
 596         /* find callref */
 597         callref = mncc->callref;
 598         port = port_first;
 599         while(port) {
 600                 if ((port->p_type & PORT_CLASS_GSM_MASK) == PORT_CLASS_GSM_BS) {
 601                         pgsm_bs = (class Pgsm_bs *)port;
 602                         if (pgsm_bs->p_g_callref == callref) {
 603                                 break;
 604                         }
 605                 }
 606                 port = port->next;
 607         }
 608
 609         if (msg_type == GSM_TCHF_FRAME
 610          || msg_type == GSM_BAD_FRAME) {
 611                 if (port) {
 612                         /* inject DTMF, if enabled */
 613                         if (pgsm_bs->p_g_dtmf) {
 614                                 unsigned char data[160];
 615                                 int i;
 616
 617                                 for (i = 0; i < 160; i++) {
 618                                         data[i] = pgsm_bs->p_g_dtmf[pgsm_bs->p_g_dtmf_index++];
 619                                         if (pgsm_bs->p_g_dtmf_index == 8000)
 620                                                 pgsm_bs->p_g_dtmf_index = 0;
 621                                 }
 622                                 /* send */
 623                                 pgsm_bs->bridge_tx(data, 160);
 624                         } else
 625                                 pgsm_bs->frame_receive(arg);
 626                         /* if we do not bridge we need to inject audio, if available */
 627                         if (!pgsm_bs->p_bridge || pgsm_bs->p_tone_name[0]) {
 628                                 unsigned char data[160];
 629                                 int i;
 630
 631                                 i = pgsm_bs->read_audio(data, 160);
 632                                 if (i)
 633                                         pgsm_bs->audio_send(data, i);
 634                         }
 635                 }
 636                 return 0;
 637         }
 638
 639         if (!port) {
 640                 struct interface *interface;
 641
 642                 if (msg_type != MNCC_SETUP_IND)
 643                         return(0);
 644
 645                 interface = getinterfacebyname(lcr_gsm->interface_name);
 646                 if (!interface) {
 647                         struct gsm_mncc *rej;
 648
 649                         rej = create_mncc(MNCC_REJ_REQ, callref);
 650                         rej->fields |= MNCC_F_CAUSE;
 651                         rej->cause.coding = 3;
 652                         rej->cause.location = 1;
 653                         rej->cause.value = 27;
 654                         gsm_trace_header(NULL, NULL, MNCC_REJ_REQ, DIRECTION_OUT);
 655                         add_trace("cause", "coding", "%d", rej->cause.coding);
 656                         add_trace("cause", "location", "%d", rej->cause.location);
 657                         add_trace("cause", "value", "%d", rej->cause.value);
 658                         add_trace("reason", NULL, "interface %s not found", lcr_gsm->interface_name);
 659                         end_trace();
 660                         send_and_free_mncc(lcr_gsm, rej->msg_type, rej);
 661                         return 0;
 662                 }
 663                 /* creating port object, transparent until setup with hdlc */
 664                 SPRINT(name, "%s-%d-in", interface->name, 0);
 665                 if (!(pgsm_bs = new Pgsm_bs(PORT_TYPE_GSM_BS_IN, name, NULL, interface)))
 666                         FATAL("Cannot create Port instance.\n");
 667         }
 668
 669         switch(msg_type) {
 670                 case MNCC_SETUP_IND:
 671                 pgsm_bs->setup_ind(msg_type, callref, mncc);
 672                 break;
 673
 674                 case MNCC_RTP_CREATE:
 675                 pgsm_bs->rtp_create_ind(msg_type, callref, mncc);
 676                 break;
 677
 678                 case MNCC_RTP_CONNECT:
 679                 pgsm_bs->rtp_connect_ind(msg_type, callref, mncc);
 680                 break;
 681
 682                 case MNCC_START_DTMF_IND:
 683                 pgsm_bs->start_dtmf_ind(msg_type, callref, mncc);
 684                 break;
 685
 686                 case MNCC_STOP_DTMF_IND:
 687                 pgsm_bs->stop_dtmf_ind(msg_type, callref, mncc);
 688                 break;
 689
 690                 case MNCC_CALL_CONF_IND:
 691                 pgsm_bs->call_conf_ind(msg_type, callref, mncc);
 692                 break;
 693
 694                 case MNCC_ALERT_IND:
 695                 pgsm_bs->alert_ind(msg_type, callref, mncc);
 696                 break;
 697
 698                 case MNCC_SETUP_CNF:
 699                 pgsm_bs->setup_cnf(msg_type, callref, mncc);
 700                 break;
 701
 702                 case MNCC_SETUP_COMPL_IND:
 703                 pgsm_bs->setup_compl_ind(msg_type, callref, mncc);
 704                 break;
 705
 706                 case MNCC_DISC_IND:
 707                 pgsm_bs->disc_ind(msg_type, callref, mncc);
 708                 break;
 709
 710                 case MNCC_REL_IND:
 711                 case MNCC_REL_CNF:
 712                 case MNCC_REJ_IND:
 713                 pgsm_bs->rel_ind(msg_type, callref, mncc);
 714                 break;
 715
 716                 case MNCC_NOTIFY_IND:
 717                 pgsm_bs->notify_ind(msg_type, callref, mncc);
 718                 break;
 719
 720                 case MNCC_HOLD_IND:
 721                 pgsm_bs->hold_ind(msg_type, callref, mncc);
 722                 break;
 723
 724                 case MNCC_RETRIEVE_IND:
 725                 pgsm_bs->retr_ind(msg_type, callref, mncc);
 726                 break;
 727
 728                 default:
 729                 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);
 730         }
 731         return(0);
 732 }
 733
 734 /* MESSAGE_SETUP */
 735 void Pgsm_bs::message_setup(unsigned int epoint_id, int message_id, union parameter *param)
 736 {
 737         struct lcr_msg *message;
 738         struct epoint_list *epointlist;
 739         struct gsm_mncc *mncc;
 740
 741         /* copy setup infos to port */
 742         memcpy(&p_callerinfo, &param->setup.callerinfo, sizeof(p_callerinfo));
 743         memcpy(&p_dialinginfo, &param->setup.dialinginfo, sizeof(p_dialinginfo));
 744         memcpy(&p_capainfo, &param->setup.capainfo, sizeof(p_capainfo));
 745         memcpy(&p_redirinfo, &param->setup.redirinfo, sizeof(p_redirinfo));
 746
 747         /* no GSM MNCC connection */
 748         if (p_g_lcr_gsm->mncc_lfd.fd < 0) {
 749                 gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
 750                 add_trace("failure", NULL, "No MNCC connection.");
 751                 end_trace();
 752                 message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 753                 message->param.disconnectinfo.cause = 41; // temp. failure.
 754                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 755                 message_put(message);
 756                 new_state(PORT_STATE_RELEASE);
 757                 trigger_work(&p_g_delete);
 758                 return;
 759         }
 760
 761         /* no number */
 762         if (!p_dialinginfo.id[0]) {
 763                 gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
 764                 add_trace("failure", NULL, "No dialed subscriber given.");
 765                 end_trace();
 766                 message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 767                 message->param.disconnectinfo.cause = 28;
 768                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 769                 message_put(message);
 770                 new_state(PORT_STATE_RELEASE);
 771                 trigger_work(&p_g_delete);
 772                 return;
 773         }
 774
 775         /* unsupported codec for RTP bridge */
 776         if (param->setup.rtpinfo.port) {
 777                 int i;
 778
 779                 p_g_rtp_payloads = 0;
 780                 gsm_trace_header(p_g_interface_name, this, 1 /* codec negotioation */, DIRECTION_NONE);
 781                 for (i = 0; i < param->setup.rtpinfo.payloads; i++) {
 782                         switch (param->setup.rtpinfo.media_types[i]) {
 783                         case MEDIA_TYPE_GSM:
 784                         case MEDIA_TYPE_GSM_EFR:
 785                         case MEDIA_TYPE_AMR:
 786                         case MEDIA_TYPE_GSM_HR:
 787                                 add_trace("rtp", "payload", "%s:%d supported", media_type2name(param->setup.rtpinfo.media_types[i]), param->setup.rtpinfo.payload_types[i]);
 788                                 if (p_g_rtp_payloads < (int)sizeof(p_g_rtp_payload_types)) {
 789                                         p_g_rtp_media_types[p_g_rtp_payloads] = param->setup.rtpinfo.media_types[i];
 790                                         p_g_rtp_payload_types[p_g_rtp_payloads] = param->setup.rtpinfo.payload_types[i];
 791                                         p_g_rtp_payloads++;
 792                                 }
 793                                 break;
 794                         default:
 795                                 add_trace("rtp", "payload", "%s:%d unsupported", media_type2name(param->setup.rtpinfo.media_types[i]), param->setup.rtpinfo.payload_types[i]);
 796                         }
 797                 }
 798                 end_trace();
 799                 if (!p_g_rtp_payloads) {
 800                         gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
 801                         add_trace("failure", NULL, "No payload given that is supported by GSM");
 802                         end_trace();
 803                         message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 804                         message->param.disconnectinfo.cause = 65;
 805                         message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 806                         message_put(message);
 807                         new_state(PORT_STATE_RELEASE);
 808                         trigger_work(&p_g_delete);
 809                         return;
 810                 }
 811         }
 812
 813 //              SCPY(&p_m_tones_dir, param->setup.ext.tones_dir);
 814         /* screen outgoing caller id */
 815         do_screen(1, p_callerinfo.id, sizeof(p_callerinfo.id), &p_callerinfo.ntype, &p_callerinfo.present, p_g_interface_name);
 816
 817         /* attach only if not already */
 818         epointlist = p_epointlist;
 819         while(epointlist) {
 820                 if (epointlist->epoint_id == epoint_id)
 821                         break;
 822                 epointlist = epointlist->next;
 823         }
 824         if (!epointlist)
 825                 epointlist_new(epoint_id);
 826
 827         /* creating l3id */
 828         gsm_trace_header(p_g_interface_name, this, 0, DIRECTION_OUT);
 829         p_g_callref = new_callref++;
 830         add_trace("callref", "new", "0x%x", p_g_callref);
 831         end_trace();
 832
 833         gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
 834         mncc = create_mncc(MNCC_SETUP_REQ, p_g_callref);
 835         /* caller information */
 836         mncc->fields |= MNCC_F_CALLING;
 837         mncc->calling.plan = 1;
 838         switch (p_callerinfo.ntype) {
 839                 case INFO_NTYPE_UNKNOWN:
 840                 mncc->calling.type = 0x0;
 841                 break;
 842                 case INFO_NTYPE_INTERNATIONAL:
 843                 mncc->calling.type = 0x1;
 844                 break;
 845                 case INFO_NTYPE_NATIONAL:
 846                 mncc->calling.type = 0x2;
 847                 break;
 848                 case INFO_NTYPE_SUBSCRIBER:
 849                 mncc->calling.type = 0x4;
 850                 break;
 851                 default: /* INFO_NTYPE_NOTPRESENT */
 852                 mncc->fields &= ~MNCC_F_CALLING;
 853                 break;
 854         }
 855         switch (p_callerinfo.screen) {
 856                 case INFO_SCREEN_USER:
 857                 mncc->calling.screen = 0;
 858                 break;
 859                 default: /* INFO_SCREEN_NETWORK */
 860                 mncc->calling.screen = 3;
 861                 break;
 862         }
 863         switch (p_callerinfo.present) {
 864                 case INFO_PRESENT_ALLOWED:
 865                 mncc->calling.present = 0;
 866                 break;
 867                 case INFO_PRESENT_RESTRICTED:
 868                 mncc->calling.present = 1;
 869                 break;
 870                 default: /* INFO_PRESENT_NOTAVAIL */
 871                 mncc->calling.present = 2;
 872                 break;
 873         }
 874         if (mncc->fields & MNCC_F_CALLING) {
 875                 SCPY(mncc->calling.number, p_callerinfo.id);
 876                 add_trace("calling", "type", "%d", mncc->calling.type);
 877                 add_trace("calling", "plan", "%d", mncc->calling.plan);
 878                 add_trace("calling", "present", "%d", mncc->calling.present);
 879                 add_trace("calling", "screen", "%d", mncc->calling.screen);
 880                 add_trace("calling", "number", "%s", mncc->calling.number);
 881         }
 882         /* dialing information */
 883         mncc->fields |= MNCC_F_CALLED;
 884         if (!strncmp(p_dialinginfo.id, "imsi-", 5)) {
 885                 SCPY(mncc->imsi, p_dialinginfo.id+5);
 886                 add_trace("dialing", "imsi", "%s", mncc->imsi);
 887         } else {
 888                 SCPY(mncc->called.number, p_dialinginfo.id);
 889                 add_trace("dialing", "number", "%s", mncc->called.number);
 890         }
 891
 892         /* sending user-user */
 893
 894         /* redirecting number */
 895         mncc->fields |= MNCC_F_REDIRECTING;
 896         mncc->redirecting.plan = 1;
 897         switch (p_redirinfo.ntype) {
 898                 case INFO_NTYPE_UNKNOWN:
 899                 mncc->redirecting.type = 0x0;
 900                 break;
 901                 case INFO_NTYPE_INTERNATIONAL:
 902                 mncc->redirecting.type = 0x1;
 903                 break;
 904                 case INFO_NTYPE_NATIONAL:
 905                 mncc->redirecting.type = 0x2;
 906                 break;
 907                 case INFO_NTYPE_SUBSCRIBER:
 908                 mncc->redirecting.type = 0x4;
 909                 break;
 910                 default: /* INFO_NTYPE_NOTPRESENT */
 911                 mncc->fields &= ~MNCC_F_REDIRECTING;
 912                 break;
 913         }
 914         switch (p_redirinfo.screen) {
 915                 case INFO_SCREEN_USER:
 916                 mncc->redirecting.screen = 0;
 917                 break;
 918                 default: /* INFO_SCREE_NETWORK */
 919                 mncc->redirecting.screen = 3;
 920                 break;
 921         }
 922         switch (p_redirinfo.present) {
 923                 case INFO_PRESENT_ALLOWED:
 924                 mncc->redirecting.present = 0;
 925                 break;
 926                 case INFO_PRESENT_RESTRICTED:
 927                 mncc->redirecting.present = 1;
 928                 break;
 929                 default: /* INFO_PRESENT_NOTAVAIL */
 930                 mncc->redirecting.present = 2;
 931                 break;
 932         }
 933         /* sending redirecting number only in ntmode */
 934         if (mncc->fields & MNCC_F_REDIRECTING) {
 935                 SCPY(mncc->redirecting.number, p_redirinfo.id);
 936                 add_trace("redir", "type", "%d", mncc->redirecting.type);
 937                 add_trace("redir", "plan", "%d", mncc->redirecting.plan);
 938                 add_trace("redir", "present", "%d", mncc->redirecting.present);
 939                 add_trace("redir", "screen", "%d", mncc->redirecting.screen);
 940                 add_trace("redir", "number", "%s", mncc->redirecting.number);
 941         }
 942
 943         end_trace();
 944         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 945
 946         new_state(PORT_STATE_OUT_SETUP);
 947
 948         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
 949         message_put(message);
 950
 951         /* RTP bridge */
 952         if (param->setup.rtpinfo.port) {
 953                 p_g_rtp_bridge = 1;
 954                 p_g_rtp_ip_remote = param->setup.rtpinfo.ip;
 955                 p_g_rtp_port_remote = param->setup.rtpinfo.port;
 956         } else
 957                 p_g_rtp_bridge = 0;
 958 }
 959
 960 /*
 961  * endpoint sends messages to the port
 962  */
 963 int Pgsm_bs::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
 964 {
 965         if (Pgsm::message_epoint(epoint_id, message_id, param))
 966                 return(1);
 967
 968         switch(message_id) {
 969                 case MESSAGE_SETUP: /* dial-out command received from epoint */
 970                 if (p_state!=PORT_STATE_IDLE)
 971                         break;
 972                 message_setup(epoint_id, message_id, param);
 973                 break;
 974
 975                 default:
 976                 PDEBUG(DEBUG_GSM, "Pgsm_bs(%s) gsm port with (caller id %s) received unhandled nessage: %d\n", p_name, p_callerinfo.id, message_id);
 977         }
 978
 979         return(1);
 980 }
 981
 982 int gsm_bs_exit(int rc)
 983 {
 984         /* free gsm instance */
 985         if (gsm_bs) {
 986                 if (gsm_bs->mncc_lfd.fd > -1) {
 987                         close(gsm_bs->mncc_lfd.fd);
 988                         unregister_fd(&gsm_bs->mncc_lfd);
 989                 }
 990
 991                 del_timer(&gsm_bs->socket_retry);
 992                 free(gsm_bs);
 993                 gsm_bs = NULL;
 994         }
 995
 996
 997         return(rc);
 998 }
 999
1000 int gsm_bs_init(struct interface *interface)
1001 {
1002         /* create gsm instance */
1003         gsm_bs = (struct lcr_gsm *)MALLOC(sizeof(struct lcr_gsm));
1004
1005         SCPY(gsm_bs->interface_name, interface->name);
1006         gsm_bs->type = LCR_GSM_TYPE_NETWORK;
1007         gsm_bs->sun.sun_family = AF_UNIX;
1008         SCPY(gsm_bs->sun.sun_path, "/tmp/bsc_mncc");
1009
1010         memset(&gsm_bs->socket_retry, 0, sizeof(gsm_bs->socket_retry));
1011         add_timer(&gsm_bs->socket_retry, mncc_socket_retry_cb, gsm_bs, 0);
1012
1013         /* do the initial connect */
1014         mncc_socket_retry_cb(&gsm_bs->socket_retry, gsm_bs, 0);
1015
1016         generate_dtmf();
1017
1018         return 0;
1019 }