gsm.cpp

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** LCR                                                                       **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **            MNCC-Interface: Harald Welte                                   **
   8 **                                                                           **
   9 ** mISDN gsm                                                                 **
  10 **                                                                           **
  11 \*****************************************************************************/
  12
  13 #include "main.h"
  14 #include "mncc.h"
  15
  16 #ifndef _GNU_SOURCE
  17 #define _GNU_SOURCE
  18 #endif
  19 extern "C" {
  20 #include "gsm_audio.h"
  21 }
  22
  23 #include <assert.h>
  24
  25 #define SOCKET_RETRY_TIMER      5
  26
  27 //struct lcr_gsm *gsm = NULL;
  28
  29 int new_callref = 1;
  30
  31 /* names of MNCC-SAP */
  32 static const struct _value_string {
  33         int msg_type;
  34         const char *name;
  35 } mncc_names[] = {
  36         { 0,                    "New call ref" },
  37         { 1,                    "Codec negotiation" },
  38         { MNCC_SETUP_REQ,       "MNCC_SETUP_REQ" },
  39         { MNCC_SETUP_IND,       "MNCC_SETUP_IND" },
  40         { MNCC_SETUP_RSP,       "MNCC_SETUP_RSP" },
  41         { MNCC_SETUP_CNF,       "MNCC_SETUP_CNF" },
  42         { MNCC_SETUP_COMPL_REQ, "MNCC_SETUP_COMPL_REQ" },
  43         { MNCC_SETUP_COMPL_IND, "MNCC_SETUP_COMPL_IND" },
  44         { MNCC_CALL_CONF_IND,   "MNCC_CALL_CONF_IND" },
  45         { MNCC_CALL_PROC_REQ,   "MNCC_CALL_PROC_REQ" },
  46         { MNCC_PROGRESS_REQ,    "MNCC_PROGRESS_REQ" },
  47         { MNCC_ALERT_REQ,       "MNCC_ALERT_REQ" },
  48         { MNCC_ALERT_IND,       "MNCC_ALERT_IND" },
  49         { MNCC_NOTIFY_REQ,      "MNCC_NOTIFY_REQ" },
  50         { MNCC_NOTIFY_IND,      "MNCC_NOTIFY_IND" },
  51         { MNCC_DISC_REQ,        "MNCC_DISC_REQ" },
  52         { MNCC_DISC_IND,        "MNCC_DISC_IND" },
  53         { MNCC_REL_REQ,         "MNCC_REL_REQ" },
  54         { MNCC_REL_IND,         "MNCC_REL_IND" },
  55         { MNCC_REL_CNF,         "MNCC_REL_CNF" },
  56         { MNCC_FACILITY_REQ,    "MNCC_FACILITY_REQ" },
  57         { MNCC_FACILITY_IND,    "MNCC_FACILITY_IND" },
  58         { MNCC_START_DTMF_IND,  "MNCC_START_DTMF_IND" },
  59         { MNCC_START_DTMF_RSP,  "MNCC_START_DTMF_RSP" },
  60         { MNCC_START_DTMF_REJ,  "MNCC_START_DTMF_REJ" },
  61         { MNCC_STOP_DTMF_IND,   "MNCC_STOP_DTMF_IND" },
  62         { MNCC_STOP_DTMF_RSP,   "MNCC_STOP_DTMF_RSP" },
  63         { MNCC_MODIFY_REQ,      "MNCC_MODIFY_REQ" },
  64         { MNCC_MODIFY_IND,      "MNCC_MODIFY_IND" },
  65         { MNCC_MODIFY_RSP,      "MNCC_MODIFY_RSP" },
  66         { MNCC_MODIFY_CNF,      "MNCC_MODIFY_CNF" },
  67         { MNCC_MODIFY_REJ,      "MNCC_MODIFY_REJ" },
  68         { MNCC_HOLD_IND,        "MNCC_HOLD_IND" },
  69         { MNCC_HOLD_CNF,        "MNCC_HOLD_CNF" },
  70         { MNCC_HOLD_REJ,        "MNCC_HOLD_REJ" },
  71         { MNCC_RETRIEVE_IND,    "MNCC_RETRIEVE_IND" },
  72         { MNCC_RETRIEVE_CNF,    "MNCC_RETRIEVE_CNF" },
  73         { MNCC_RETRIEVE_REJ,    "MNCC_RETRIEVE_REJ" },
  74         { MNCC_USERINFO_REQ,    "MNCC_USERINFO_REQ" },
  75         { MNCC_USERINFO_IND,    "MNCC_USERINFO_IND" },
  76         { MNCC_REJ_REQ,         "MNCC_REJ_REQ" },
  77         { MNCC_REJ_IND,         "MNCC_REJ_IND" },
  78         { MNCC_PROGRESS_IND,    "MNCC_PROGRESS_IND" },
  79         { MNCC_CALL_PROC_IND,   "MNCC_CALL_PROC_IND" },
  80         { MNCC_CALL_CONF_REQ,   "MNCC_CALL_CONF_REQ" },
  81         { MNCC_START_DTMF_REQ,  "MNCC_START_DTMF_REQ" },
  82         { MNCC_STOP_DTMF_REQ,   "MNCC_STOP_DTMF_REQ" },
  83         { MNCC_HOLD_REQ,        "MNCC_HOLD_REQ " },
  84         { MNCC_RETRIEVE_REQ,    "MNCC_RETRIEVE_REQ" },
  85
  86         { MNCC_LCHAN_MODIFY,    "MNCC_LCHAN_MODIFY" },
  87
  88         { MNCC_BRIDGE,          "MNCC_BRIDGE" },
  89         { MNCC_FRAME_RECV,      "MNCC_FRAME_RECV" },
  90         { MNCC_FRAME_DROP,      "MNCC_FRAME_DROP" },
  91         { MNCC_RTP_CREATE,      "MNCC_RTP_CREATE" },
  92         { MNCC_RTP_CONNECT,     "MNCC_RTP_CONNECT" },
  93         { MNCC_RTP_FREE,        "MNCC_RTP_FREE" },
  94
  95         { 0,                    NULL }
  96 };
  97
  98 const char *mncc_name(int value)
  99 {
 100         int i = 0;
 101         static char ukn[32];
 102
 103         while (mncc_names[i].name) {
 104                 if (mncc_names[i].msg_type == value)
 105                         return mncc_names[i].name;
 106                 i++;
 107         }
 108         SPRINT(ukn, "unknown(0x%x)", value);
 109         return ukn;
 110 }
 111
 112 static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data);
 113
 114 /*
 115  * create and send mncc message
 116  */
 117 struct gsm_mncc *create_mncc(int msg_type, unsigned int callref)
 118 {
 119         struct gsm_mncc *mncc;
 120
 121         mncc = (struct gsm_mncc *)MALLOC(sizeof(struct gsm_mncc));
 122         mncc->msg_type = msg_type;
 123         mncc->callref = callref;
 124         return (mncc);
 125 }
 126 int send_and_free_mncc(struct lcr_gsm *lcr_gsm, unsigned int msg_type, void *data)
 127 {
 128         int ret = 0;
 129
 130         if (lcr_gsm) {
 131                 ret = mncc_send(lcr_gsm, msg_type, data);
 132         }
 133         free(data);
 134
 135         return ret;
 136 }
 137
 138 void Pgsm::send_mncc_rtp_connect(void)
 139 {
 140         struct gsm_mncc_rtp *nrtp;
 141
 142         nrtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CONNECT, p_g_callref);
 143         nrtp->ip = p_g_rtp_ip_remote;
 144         nrtp->port = p_g_rtp_port_remote;
 145         switch (p_g_media_type) {
 146         case MEDIA_TYPE_GSM:
 147                 nrtp->payload_msg_type = GSM_TCHF_FRAME;
 148                 break;
 149         case MEDIA_TYPE_GSM_EFR:
 150                 nrtp->payload_msg_type = GSM_TCHF_FRAME_EFR;
 151                 break;
 152         case MEDIA_TYPE_AMR:
 153                 nrtp->payload_msg_type = GSM_TCH_FRAME_AMR;
 154                 break;
 155         case MEDIA_TYPE_GSM_HR:
 156                 nrtp->payload_msg_type = GSM_TCHH_FRAME;
 157                 break;
 158         }
 159         nrtp->payload_type = p_g_payload_type;
 160         PDEBUG(DEBUG_GSM, "sending MNCC RTP connect with payload_msg_type=%x, payload_type=%d\n", nrtp->payload_msg_type, nrtp->payload_type);
 161         send_and_free_mncc(p_g_lcr_gsm, nrtp->msg_type, nrtp);
 162 }
 163
 164 static int delete_event(struct lcr_work *work, void *instance, int index);
 165
 166 /*
 167  * constructor
 168  */
 169 Pgsm::Pgsm(int type, char *portname, struct port_settings *settings, struct interface *interface) : Port(type, portname, settings, interface)
 170 {
 171 #ifdef WITH_GSMHR
 172         signed short homing[160];
 173         int i;
 174 #endif
 175
 176         p_g_tones = 0;
 177         if (interface->is_tones == IS_YES)
 178                 p_g_tones = 1;
 179         p_g_earlyb = 0;
 180         if (interface->is_earlyb == IS_YES)
 181                 p_g_earlyb = 1;
 182         p_g_rtp_bridge = 0;
 183         if (interface->rtp_bridge)
 184                 p_g_rtp_bridge = 1;
 185         p_g_rtp_payloads = 0;
 186         memset(&p_g_samples, 0, sizeof(p_g_samples));
 187         p_callerinfo.itype = (interface->extension)?INFO_ITYPE_ISDN_EXTENSION:INFO_ITYPE_ISDN;
 188         memset(&p_g_delete, 0, sizeof(p_g_delete));
 189         add_work(&p_g_delete, delete_event, this, 0);
 190         p_g_lcr_gsm = NULL;
 191         p_g_callref = 0;
 192         p_g_mode = 0;
 193         p_g_gsm_b_sock = -1;
 194         p_g_gsm_b_index = -1;
 195         p_g_gsm_b_active = 0;
 196         p_g_notify_pending = NULL;
 197         p_g_setup_pending = NULL;
 198         p_g_connect_pending = NULL;
 199         p_g_fr_decoder = NULL;
 200         p_g_fr_encoder = NULL;
 201         p_g_hr_decoder = NULL;
 202         p_g_hr_encoder = NULL;
 203         p_g_amr_decoder = NULL;
 204         p_g_amr_encoder = NULL;
 205         p_g_amr_cmr = 0;
 206         p_g_amr_cmr_valid = 0;
 207 #ifdef WITH_GSMFR
 208         p_g_fr_decoder = gsm_fr_create();
 209         p_g_fr_encoder = gsm_fr_create();
 210         if (!p_g_fr_encoder || !p_g_fr_decoder) {
 211                 PERROR("Failed to create GSM FR codec instance\n");
 212                 trigger_work(&p_g_delete);
 213         }
 214 #endif
 215 #ifdef WITH_GSMHR
 216         p_g_hr_decoder = gsm_hr_create();
 217         p_g_hr_encoder = gsm_hr_create();
 218         if (!p_g_hr_encoder || !p_g_hr_decoder) {
 219                 PERROR("Failed to create GSM HR codec instance\n");
 220                 trigger_work(&p_g_delete);
 221         }
 222         /* Homing */
 223         for (i = 0; i < 160; i++)
 224                 homing[i] = 0x0008;
 225         gsm_hr_encode(p_g_hr_encoder, homing, NULL);
 226 #endif
 227 #ifdef WITH_GSMAMR
 228         p_g_amr_decoder = gsm_amr_create();
 229         p_g_amr_encoder = gsm_amr_create();
 230         if (!p_g_amr_encoder || !p_g_amr_decoder) {
 231                 PERROR("Failed to create GSM AMR codec instance\n");
 232                 trigger_work(&p_g_delete);
 233         }
 234 #endif
 235         p_g_rxpos = 0;
 236         p_g_tch_connected = 0;
 237         p_g_media_type = 0;
 238
 239         PDEBUG(DEBUG_GSM, "Created new GSMPort(%s).\n", portname);
 240 }
 241
 242 /*
 243  * destructor
 244  */
 245 Pgsm::~Pgsm()
 246 {
 247         PDEBUG(DEBUG_GSM, "Destroyed GSM process(%s).\n", p_name);
 248
 249         del_work(&p_g_delete);
 250
 251         /* remove queued message */
 252         if (p_g_notify_pending)
 253                 message_free(p_g_notify_pending);
 254         if (p_g_setup_pending)
 255                 message_free(p_g_setup_pending);
 256         if (p_g_connect_pending)
 257                 message_free(p_g_connect_pending);
 258
 259 //#ifdef WITH_GSMFR
 260         /* close codec */
 261         if (p_g_fr_encoder)
 262                 gsm_fr_destroy(p_g_fr_encoder);
 263         if (p_g_fr_decoder)
 264                 gsm_fr_destroy(p_g_fr_decoder);
 265 //#endif
 266 #ifdef WITH_GSMHR
 267         if (p_g_hr_encoder)
 268                 gsm_hr_destroy(p_g_hr_encoder);
 269         if (p_g_hr_decoder)
 270                 gsm_hr_destroy(p_g_hr_decoder);
 271 #endif
 272 #ifdef WITH_GSMAMR
 273         /* close codec */
 274         if (p_g_amr_encoder)
 275                 gsm_amr_destroy(p_g_amr_encoder);
 276         if (p_g_amr_decoder)
 277                 gsm_amr_destroy(p_g_amr_decoder);
 278 #endif
 279 }
 280
 281
 282 /* receive encoded frame from gsm */
 283 void Pgsm::frame_receive(void *arg)
 284 {
 285         struct gsm_data_frame *frame = (struct gsm_data_frame *)arg;
 286         unsigned char data[160];
 287         int i, cmr;
 288
 289         if (!p_g_fr_decoder)
 290                 return;
 291
 292         switch (frame->msg_type) {
 293         case GSM_TCHF_FRAME:
 294                 if (p_g_media_type != MEDIA_TYPE_GSM) {
 295                         PERROR("FR frame, but current media type mismatches.\n");
 296                         return;
 297                 }
 298                 if (!p_g_fr_decoder) {
 299                         PERROR("FR frame, but decoder not created.\n");
 300                         return;
 301                 }
 302                 if ((frame->data[0]>>4) != 0xd) {
 303                         PDEBUG(DEBUG_GSM, "received GSM frame with wrong magig 0x%x\n", frame->data[0]>>4);
 304                         goto bfi;
 305                 }
 306 #ifdef WITH_GSMFR
 307                 /* decode */
 308                 gsm_fr_decode(p_g_fr_decoder, frame->data, p_g_samples);
 309                 for (i = 0; i < 160; i++) {
 310                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 311                 }
 312 #endif
 313                 break;
 314         case GSM_TCHH_FRAME:
 315                 if (p_g_media_type != MEDIA_TYPE_GSM_HR) {
 316                         PERROR("HR frame, but current media type mismatches.\n");
 317                         return;
 318                 }
 319                 if (!p_g_hr_decoder) {
 320                         PERROR("HR frame, but decoder not created.\n");
 321                         return;
 322                 }
 323                 if ((frame->data[0]>>4) != 0x0)
 324                         goto bfi;
 325 #ifdef WITH_GSMHR
 326                 /* decode */
 327                 if (gsm_hr_decode(p_g_hr_decoder, frame->data, p_g_samples))
 328                         goto bfi;
 329                 for (i = 0; i < 160; i++) {
 330                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 331                 }
 332 #endif
 333                 break;
 334         case GSM_TCHF_FRAME_EFR:
 335                 if (p_g_media_type != MEDIA_TYPE_GSM_EFR) {
 336                         PERROR("EFR frame, but current media type mismatches.\n");
 337                         return;
 338                 }
 339                 if (!p_g_amr_decoder) {
 340                         PERROR("EFR frame, but decoder not created.\n");
 341                         return;
 342                 }
 343                 if ((frame->data[0]>>4) != 0xc)
 344                         goto bfi;
 345 #ifdef WITH_GSMAMR
 346                 /* decode */
 347                 gsm_efr_decode(p_g_amr_decoder, frame->data, p_g_samples);
 348                 for (i = 0; i < 160; i++) {
 349                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 350                 }
 351 #endif
 352                 break;
 353         case GSM_TCH_FRAME_AMR:
 354                 if (p_g_media_type != MEDIA_TYPE_AMR) {
 355                         PERROR("AMR frame, but current media type mismatches.\n");
 356                         return;
 357                 }
 358                 if (!p_g_amr_decoder) {
 359                         PERROR("AMR frame, but decoder not created.\n");
 360                         return;
 361                 }
 362                 cmr = (frame->data[1] >> 4);
 363                 if (cmr <= 7) {
 364                         p_g_amr_cmr = cmr;
 365                         p_g_amr_cmr_valid = 1;
 366                 }
 367                 if (!(frame->data[2] & 0x04))
 368                         goto bfi;
 369 #ifdef WITH_GSMAMR
 370                 /* decode (skip length byte in front) */
 371                 gsm_amr_decode(p_g_amr_decoder, frame->data + 1, p_g_samples);
 372                 for (i = 0; i < 160; i++) {
 373                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 374                 }
 375 #endif
 376                 break;
 377         case GSM_BAD_FRAME:
 378         default:
 379 bfi:
 380                 if (p_echotest) {
 381                         /* beep on bad frame */
 382                         for (i = 0; i < 160; i++) {
 383                                 if ((i & 3) > 2)
 384                                         p_g_samples[i] = 15000;
 385                                 else
 386                                         p_g_samples[i] = -15000;
 387                                 data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 388                         }
 389                 } else {
 390                         /* repeat on bad frame */
 391                         for (i = 0; i < 160; i++) {
 392                                 p_g_samples[i] = (p_g_samples[i] * 14) >> 4;
 393                                 data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 394                         }
 395                 }
 396         }
 397
 398         /* record data */
 399         if (p_record)
 400                 record(data, 160, 0); // from down
 401         if (p_tap)
 402                 tap(data, 160, 0); // from down
 403
 404         /* local echo */
 405         if (p_echotest)
 406                 bridge_rx(data, 160);
 407
 408         /* send to remote*/
 409         bridge_tx(data, 160);
 410 }
 411
 412 /* send traffic to gsm */
 413 int Pgsm::bridge_rx(unsigned char *data, int len)
 414 {
 415         if (p_tone_name[0])
 416                 return -EINVAL;
 417
 418         return audio_send(data, len);
 419 }
 420
 421 int Pgsm::audio_send(unsigned char *data, int len)
 422 {
 423         unsigned char frame[33];
 424         int ret;
 425
 426         /* record data */
 427         if (p_record)
 428                 record(data, len, 1); // from up
 429         if (p_tap)
 430                 tap(data, len, 1); // from up
 431
 432         /* encoder init failed */
 433         if (!p_g_fr_encoder)
 434                 return -EINVAL;
 435
 436         /* (currently) not connected, so don't flood tch! */
 437         if (!p_g_tch_connected)
 438                 return -EINVAL;
 439
 440         /* write to rx buffer */
 441         while(len--) {
 442                 p_g_rxdata[p_g_rxpos++] = audio_law_to_s32[*data++];
 443                 if (p_g_rxpos != 160)
 444                         continue;
 445                 p_g_rxpos = 0;
 446
 447                 switch (p_g_media_type) {
 448                 case MEDIA_TYPE_GSM:
 449                         if (!p_g_fr_encoder) {
 450                                 PERROR("FR frame, but encoder not created.\n");
 451                                 break;
 452                         }
 453 #ifdef WITH_GSMFR
 454                         /* encode data */
 455                         gsm_fr_encode(p_g_fr_encoder, p_g_rxdata, frame);
 456                         frame_send(frame, 33, GSM_TCHF_FRAME);
 457 #endif
 458                         break;
 459                 case MEDIA_TYPE_GSM_HR:
 460                         if (!p_g_hr_encoder) {
 461                                 PERROR("HR frame, but encoder not created.\n");
 462                                 break;
 463                         }
 464 #ifdef WITH_GSMHR
 465                         /* encode data */
 466                         gsm_hr_encode(p_g_hr_encoder, p_g_rxdata, frame);
 467                         frame_send(frame, 15, GSM_TCHH_FRAME);
 468 #endif
 469                         break;
 470                 case MEDIA_TYPE_GSM_EFR:
 471                         if (!p_g_amr_encoder) {
 472                                 PERROR("EFR frame, but encoder not created.\n");
 473                                 break;
 474                         }
 475 #ifdef WITH_GSMAMR
 476                         /* encode data */
 477                         gsm_efr_encode(p_g_amr_encoder, p_g_rxdata, frame);
 478                         frame_send(frame, 31, GSM_TCHF_FRAME_EFR);
 479 #endif
 480                         break;
 481                 case MEDIA_TYPE_AMR:
 482                         if (!p_g_amr_encoder) {
 483                                 PERROR("AMR frame, but encoder not created.\n");
 484                                 break;
 485                         }
 486                         if (!p_g_amr_cmr_valid) {
 487                                 PDEBUG(DEBUG_GSM, "no valid CMR yet.\n");
 488                                 break;
 489                         }
 490 #ifdef WITH_GSMAMR
 491                         /* encode data (prefix a length byte) */
 492                         ret = gsm_amr_encode(p_g_amr_encoder, p_g_rxdata, frame + 1, p_g_amr_cmr);
 493                         frame[0] = ret;
 494                         frame_send(frame, ret + 1, GSM_TCH_FRAME_AMR);
 495 #endif
 496                         break;
 497                 }
 498         }
 499
 500         return 0;
 501 }
 502
 503 void Pgsm::frame_send(void *_frame, int len, int msg_type)
 504 {
 505         unsigned char buffer[sizeof(struct gsm_data_frame) + len];
 506         struct gsm_data_frame *frame = (struct gsm_data_frame *)buffer;
 507
 508         frame->msg_type = msg_type;
 509         frame->callref = p_g_callref;
 510         memcpy(frame->data, _frame, len);
 511
 512         if (p_g_lcr_gsm) {
 513                 mncc_send(p_g_lcr_gsm, frame->msg_type, frame);
 514         }
 515 }
 516
 517 /*
 518  * create trace
 519  */
 520 void gsm_trace_header(const char *interface_name, class Pgsm *port, unsigned int msg_type, int direction)
 521 {
 522         char msgtext[64];
 523         struct interface *interface = interface_first;
 524
 525         interface = getinterfacebyname(interface_name);
 526         if (!interface)
 527                 return;
 528
 529         /* select message and primitive text */
 530         SCPY(msgtext, mncc_name(msg_type));
 531
 532         /* add direction */
 533         if (port) {
 534                 switch(port->p_type) {
 535                 case PORT_TYPE_GSM_BS_OUT:
 536                 case PORT_TYPE_GSM_BS_IN:
 537                         SCAT(msgtext, " LCR<->BSC");
 538                         break;
 539                 case PORT_TYPE_GSM_MS_OUT:
 540                 case PORT_TYPE_GSM_MS_IN:
 541                         SCAT(msgtext, " LCR<->MS");
 542                         break;
 543                 }
 544         } else
 545                 SCAT(msgtext, " ----");
 546
 547         /* init trace with given values */
 548         start_trace(-1,
 549                     interface,
 550                     port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
 551                     port?port->p_dialinginfo.id:NULL,
 552                     direction,
 553                     CATEGORY_CH,
 554                     port?port->p_serial:0,
 555                     msgtext);
 556 }
 557
 558 /* modify lchan to given payload type */
 559 void Pgsm::modify_lchan(int media_type)
 560 {
 561         struct gsm_mncc *mode;
 562
 563         /* already modified to that media type */
 564         if (p_g_media_type == media_type)
 565                 return;
 566
 567         p_g_media_type = media_type;
 568         gsm_trace_header(p_interface_name, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
 569         mode = create_mncc(MNCC_LCHAN_MODIFY, p_g_callref);
 570         switch (media_type) {
 571         case MEDIA_TYPE_GSM_EFR:
 572                 add_trace("speech", "version", "EFR given");
 573                 mode->lchan_mode = 0x21; /* GSM V2 */
 574                 break;
 575         case MEDIA_TYPE_AMR:
 576                 add_trace("speech", "version", "AMR given");
 577                 mode->lchan_mode = 0x41; /* GSM V3 */
 578                 break;
 579         default:
 580                 add_trace("speech", "version", "Full/Half Rate given");
 581                 mode->lchan_mode = 0x01; /* GSM V1 */
 582         }
 583         mode->lchan_type = 0x02; /* FIXME: unused */
 584         add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
 585         end_trace();
 586         send_and_free_mncc(p_g_lcr_gsm, mode->msg_type, mode);
 587 }
 588
 589 /* CALL PROCEEDING INDICATION (from network) */
 590 void Pgsm::call_proc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 591 {
 592         struct lcr_msg *message;
 593         struct gsm_mncc *frame;
 594
 595         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 596         end_trace();
 597
 598         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
 599         message_put(message);
 600
 601         new_state(PORT_STATE_OUT_PROCEEDING);
 602
 603         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 604                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 605                 end_trace();
 606                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 607                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 608                 p_g_tch_connected = 1;
 609         }
 610
 611         /* modify to GSM FR (this is GSM user side only, so there is FR supported only) */
 612         modify_lchan(MEDIA_TYPE_GSM);
 613 }
 614
 615 /* ALERTING INDICATION */
 616 void Pgsm::alert_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 617 {
 618         struct lcr_msg *message;
 619         struct gsm_mncc *frame;
 620
 621         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 622         end_trace();
 623
 624         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_ALERTING);
 625         message_put(message);
 626
 627         new_state(PORT_STATE_OUT_ALERTING);
 628
 629         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 630                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 631                 end_trace();
 632                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 633                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 634                 p_g_tch_connected = 1;
 635         }
 636
 637         /* modify to GSM FR, if not already */
 638         if (!p_g_media_type) {
 639                 modify_lchan(MEDIA_TYPE_GSM);
 640         }
 641 }
 642
 643 /* CONNECT INDICATION */
 644 void Pgsm::setup_cnf(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 645 {
 646         struct gsm_mncc *resp, *frame;
 647         struct lcr_msg *message;
 648
 649         SCPY(p_connectinfo.id, mncc->connected.number);
 650         SCPY(p_connectinfo.imsi, mncc->imsi);
 651         p_connectinfo.present = INFO_PRESENT_ALLOWED;
 652         p_connectinfo.screen = INFO_SCREEN_NETWORK;
 653         p_connectinfo.ntype = INFO_NTYPE_UNKNOWN;
 654         SCPY(p_connectinfo.interface, p_interface_name);
 655
 656         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 657         if (p_connectinfo.id[0])
 658                 add_trace("connect", "number", "%s", p_connectinfo.id);
 659         else if (mncc->imsi[0])
 660                 SPRINT(p_connectinfo.id, "imsi-%s", p_connectinfo.imsi);
 661         if (mncc->imsi[0])
 662                 add_trace("connect", "imsi", "%s", p_connectinfo.imsi);
 663         end_trace();
 664
 665         /* send resp */
 666         gsm_trace_header(p_interface_name, this, MNCC_SETUP_COMPL_REQ, DIRECTION_OUT);
 667         resp = create_mncc(MNCC_SETUP_COMPL_REQ, p_g_callref);
 668         end_trace();
 669         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 670
 671         new_state(PORT_STATE_CONNECT);
 672
 673         if (!p_g_tch_connected) { /* only if ... */
 674                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 675                 end_trace();
 676                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 677                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 678                 p_g_tch_connected = 1;
 679         }
 680
 681         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
 682         memcpy(&message->param.connectinfo, &p_connectinfo, sizeof(struct connect_info));
 683
 684         /* if we have a bridge, but not yet modified, the phone accepts out requested payload.
 685          * we force the first in list */
 686         if (p_g_rtp_bridge) {
 687                 if (!p_g_media_type) {
 688                         /* modify to first given type */
 689                         modify_lchan(p_g_rtp_media_types[0]);
 690                         /* also set payload type */
 691                         p_g_payload_type = p_g_rtp_payload_types[0];
 692                 }
 693                 message->param.connectinfo.rtpinfo.media_types[0] = p_g_media_type;
 694                 message->param.connectinfo.rtpinfo.payload_types[0] = p_g_payload_type;
 695                 message->param.connectinfo.rtpinfo.payloads = 1;
 696         } else {
 697                 /* modify to GSM FR, if not already
 698                 * for network side, this should have been already happened */
 699                 if (!p_g_media_type)
 700                         modify_lchan(MEDIA_TYPE_GSM);
 701         }
 702
 703
 704         if (p_g_rtp_bridge) {
 705                 struct gsm_mncc_rtp *rtp;
 706
 707                 PDEBUG(DEBUG_GSM, "Request RTP peer info, before forwarding connect msg\n");
 708                 p_g_connect_pending = message;
 709                 rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CREATE, p_g_callref);
 710                 send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
 711         } else
 712                 message_put(message);
 713 }
 714
 715 /* CONNECT ACK INDICATION */
 716 void Pgsm::setup_compl_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 717 {
 718         struct gsm_mncc *frame;
 719
 720         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 721         end_trace();
 722
 723         new_state(PORT_STATE_CONNECT);
 724
 725         if (!p_g_tch_connected) { /* only if ... */
 726                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 727                 end_trace();
 728                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 729                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 730                 p_g_tch_connected = 1;
 731         }
 732
 733         /* modify to GSM FR, if not already */
 734         if (!p_g_media_type) {
 735                 modify_lchan(MEDIA_TYPE_GSM);
 736         }
 737 }
 738
 739 /* DISCONNECT INDICATION */
 740 void Pgsm::disc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 741 {
 742         struct lcr_msg *message;
 743         int cause = 16, location = 0;
 744         struct gsm_mncc *resp;
 745
 746         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 747         if (mncc->fields & MNCC_F_CAUSE) {
 748                 location = mncc->cause.location;
 749                 cause = mncc->cause.value;
 750                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 751                 add_trace("cause", "location", "%d", location);
 752                 add_trace("cause", "value", "%d", cause);
 753         }
 754         end_trace();
 755
 756         /* send release */
 757         resp = create_mncc(MNCC_REL_REQ, p_g_callref);
 758         gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
 759 #if 0
 760         resp->fields |= MNCC_F_CAUSE;
 761         resp->cause.coding = 3;
 762         resp->cause.location = 1;
 763         resp->cause.value = cause;
 764         add_trace("cause", "coding", "%d", resp->cause.coding);
 765         add_trace("cause", "location", "%d", resp->cause.location);
 766         add_trace("cause", "value", "%d", resp->cause.value);
 767 #endif
 768         end_trace();
 769         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 770
 771         /* sending release to endpoint */
 772         while(p_epointlist) {
 773                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 774                 message->param.disconnectinfo.cause = cause;
 775                 message->param.disconnectinfo.location = location;
 776                 message_put(message);
 777                 /* remove epoint */
 778                 free_epointlist(p_epointlist);
 779         }
 780         new_state(PORT_STATE_RELEASE);
 781         trigger_work(&p_g_delete);
 782 }
 783
 784 /* CC_RELEASE INDICATION */
 785 void Pgsm::rel_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 786 {
 787         int location = 0, cause = 16;
 788         struct lcr_msg *message;
 789
 790         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 791         if (mncc->fields & MNCC_F_CAUSE) {
 792                 location = mncc->cause.location;
 793                 cause = mncc->cause.value;
 794                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 795                 add_trace("cause", "location", "%d", mncc->cause.location);
 796                 add_trace("cause", "value", "%d", mncc->cause.value);
 797         }
 798         end_trace();
 799
 800         /* sending release to endpoint */
 801         while(p_epointlist) {
 802                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 803                 message->param.disconnectinfo.cause = cause;
 804                 message->param.disconnectinfo.location = location;
 805                 message_put(message);
 806                 /* remove epoint */
 807                 free_epointlist(p_epointlist);
 808         }
 809         new_state(PORT_STATE_RELEASE);
 810         trigger_work(&p_g_delete);
 811 }
 812
 813 /* NOTIFY INDICATION */
 814 void Pgsm::notify_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 815 {
 816         struct lcr_msg *message;
 817
 818         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 819         add_trace("notify", NULL, "%d", mncc->notify);
 820         end_trace();
 821
 822         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 823         message->param.notifyinfo.notify = mncc->notify;
 824         message_put(message);
 825 }
 826
 827 /* MESSAGE_NOTIFY */
 828 void Pgsm::message_notify(unsigned int epoint_id, int message_id, union parameter *param)
 829 {
 830         struct gsm_mncc *mncc;
 831         int notify;
 832
 833 //      printf("if = %d\n", param->notifyinfo.notify);
 834         if (param->notifyinfo.notify>INFO_NOTIFY_NONE) {
 835                 notify = param->notifyinfo.notify & 0x7f;
 836                 if (p_state!=PORT_STATE_CONNECT /*&& p_state!=PORT_STATE_IN_PROCEEDING*/ && p_state!=PORT_STATE_IN_ALERTING) {
 837                         /* queue notification */
 838                         if (p_g_notify_pending)
 839                                 message_free(p_g_notify_pending);
 840                         p_g_notify_pending = message_create(ACTIVE_EPOINT(p_epointlist), p_serial, EPOINT_TO_PORT, message_id);
 841                         memcpy(&p_g_notify_pending->param, param, sizeof(union parameter));
 842                 } else {
 843                         /* sending notification */
 844                         gsm_trace_header(p_interface_name, this, MNCC_NOTIFY_REQ, DIRECTION_OUT);
 845                         add_trace("notify", NULL, "%d", notify);
 846                         end_trace();
 847                         mncc = create_mncc(MNCC_NOTIFY_REQ, p_g_callref);
 848                         mncc->notify = notify;
 849                         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 850                 }
 851         }
 852 }
 853
 854 /* RTP create indication */
 855 void Pgsm::rtp_create_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 856 {
 857         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 858
 859         /* send queued setup, as we received remote RTP info */
 860         if (p_g_setup_pending) {
 861                 struct lcr_msg *message;
 862
 863                 message = p_g_setup_pending;
 864                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding setup\n", rtp->ip, rtp->port);
 865                 message->param.setup.rtpinfo.ip = rtp->ip;
 866                 message->param.setup.rtpinfo.port = rtp->port;
 867                 message_put(message);
 868                 p_g_setup_pending = NULL;
 869         }
 870         if (p_g_connect_pending) {
 871                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) connecting RTP... \n", rtp->ip, rtp->port);
 872                 send_mncc_rtp_connect();
 873         }
 874 }
 875
 876 /* RTP connect indication */
 877 void Pgsm::rtp_connect_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 878 {
 879         struct lcr_msg *message;
 880         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 881
 882         if (p_g_connect_pending) {
 883                 message = p_g_connect_pending;
 884                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding connect\n", rtp->ip, rtp->port);
 885                 message->param.connectinfo.rtpinfo.ip = rtp->ip;
 886                 message->param.connectinfo.rtpinfo.port = rtp->port;
 887                 message_put(message);
 888                 p_g_connect_pending = NULL;
 889         }
 890 }
 891
 892 /* MESSAGE_PROGRESS */
 893 void Pgsm::message_progress(unsigned int epoint_id, int message_id, union parameter *param)
 894 {
 895         if (param->progressinfo.progress == 8) {
 896                 PDEBUG(DEBUG_GSM, "Remote provides tones for us\n");
 897                 p_g_tones = 1;
 898         }
 899
 900         if (param->progressinfo.rtpinfo.port) {
 901                 PDEBUG(DEBUG_GSM, "PROGRESS with RTP peer info, sent to BSC (%08x,%d) with media %d, pt %d\n", param->progressinfo.rtpinfo.ip, param->progressinfo.rtpinfo.port, param->progressinfo.rtpinfo.media_types[0], param->progressinfo.rtpinfo.payload_types[0]);
 902
 903                 /* modify channel to givne type, also sets media type */
 904                 modify_lchan(param->progressinfo.rtpinfo.media_types[0]);
 905
 906                 /* connect RTP */
 907                 p_g_rtp_ip_remote = param->progressinfo.rtpinfo.ip;
 908                 p_g_rtp_port_remote = param->progressinfo.rtpinfo.port;
 909                 /* p_g_media_type is already set by modify_lchan() */
 910                 p_g_payload_type = param->progressinfo.rtpinfo.payload_types[0];
 911                 send_mncc_rtp_connect();
 912         }
 913 }
 914
 915 /* MESSAGE_ALERTING */
 916 void Pgsm::message_alerting(unsigned int epoint_id, int message_id, union parameter *param)
 917 {
 918         struct gsm_mncc *mncc;
 919
 920         /* send alert */
 921         gsm_trace_header(p_interface_name, this, MNCC_ALERT_REQ, DIRECTION_OUT);
 922         mncc = create_mncc(MNCC_ALERT_REQ, p_g_callref);
 923         if (p_g_tones) {
 924                 mncc->fields |= MNCC_F_PROGRESS;
 925                 mncc->progress.coding = 3; /* GSM */
 926                 mncc->progress.location = 1;
 927                 mncc->progress.descr = 8;
 928                 add_trace("progress", "coding", "%d", mncc->progress.coding);
 929                 add_trace("progress", "location", "%d", mncc->progress.location);
 930                 add_trace("progress", "descr", "%d", mncc->progress.descr);
 931         }
 932         end_trace();
 933         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 934
 935         new_state(PORT_STATE_IN_ALERTING);
 936
 937         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
 938                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 939                 end_trace();
 940                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 941                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 942                 p_g_tch_connected = 1;
 943         }
 944
 945         /* modify to GSM FR, if not already */
 946         if (!p_g_media_type) {
 947                 modify_lchan(MEDIA_TYPE_GSM);
 948         }
 949 }
 950
 951 /* MESSAGE_CONNECT */
 952 void Pgsm::message_connect(unsigned int epoint_id, int message_id, union parameter *param)
 953 {
 954         struct gsm_mncc *mncc;
 955
 956         /* copy connected information */
 957         memcpy(&p_connectinfo, &param->connectinfo, sizeof(p_connectinfo));
 958         /* screen outgoing caller id */
 959         do_screen(1, p_connectinfo.id, sizeof(p_connectinfo.id), &p_connectinfo.ntype, &p_connectinfo.present, p_interface_name);
 960
 961         /* send connect */
 962         mncc = create_mncc(MNCC_SETUP_RSP, p_g_callref);
 963         gsm_trace_header(p_interface_name, this, MNCC_SETUP_RSP, DIRECTION_OUT);
 964         /* caller information */
 965         mncc->fields |= MNCC_F_CONNECTED;
 966         mncc->connected.plan = 1;
 967         switch (p_callerinfo.ntype) {
 968                 case INFO_NTYPE_UNKNOWN:
 969                 mncc->connected.type = 0x0;
 970                 break;
 971                 case INFO_NTYPE_INTERNATIONAL:
 972                 mncc->connected.type = 0x1;
 973                 break;
 974                 case INFO_NTYPE_NATIONAL:
 975                 mncc->connected.type = 0x2;
 976                 break;
 977                 case INFO_NTYPE_SUBSCRIBER:
 978                 mncc->connected.type = 0x4;
 979                 break;
 980                 default: /* INFO_NTYPE_NOTPRESENT */
 981                 mncc->fields &= ~MNCC_F_CONNECTED;
 982                 break;
 983         }
 984         switch (p_callerinfo.screen) {
 985                 case INFO_SCREEN_USER:
 986                 mncc->connected.screen = 0;
 987                 break;
 988                 default: /* INFO_SCREEN_NETWORK */
 989                 mncc->connected.screen = 3;
 990                 break;
 991         }
 992         switch (p_callerinfo.present) {
 993                 case INFO_PRESENT_ALLOWED:
 994                 mncc->connected.present = 0;
 995                 break;
 996                 case INFO_PRESENT_RESTRICTED:
 997                 mncc->connected.present = 1;
 998                 break;
 999                 default: /* INFO_PRESENT_NOTAVAIL */
1000                 mncc->connected.present = 2;
1001                 break;
1002         }
1003         if (mncc->fields & MNCC_F_CONNECTED) {
1004                 SCPY(mncc->connected.number, p_connectinfo.id);
1005                 add_trace("connected", "type", "%d", mncc->connected.type);
1006                 add_trace("connected", "plan", "%d", mncc->connected.plan);
1007                 add_trace("connected", "present", "%d", mncc->connected.present);
1008                 add_trace("connected", "screen", "%d", mncc->connected.screen);
1009                 add_trace("connected", "number", "%s", mncc->connected.number);
1010         }
1011         end_trace();
1012         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1013
1014         new_state(PORT_STATE_CONNECT_WAITING);
1015
1016         if (param->connectinfo.rtpinfo.port) {
1017                 PDEBUG(DEBUG_GSM, "CONNECT with RTP peer info, sent to BSC (%08x,%d)\n", param->connectinfo.rtpinfo.ip, param->connectinfo.rtpinfo.port);
1018
1019                 /* modify channel to givne type, also sets media type */
1020                 modify_lchan(param->connectinfo.rtpinfo.media_types[0]);
1021
1022                 /* connect RTP */
1023                 p_g_rtp_ip_remote = param->connectinfo.rtpinfo.ip;
1024                 p_g_rtp_port_remote = param->connectinfo.rtpinfo.port;
1025                 /* p_g_media_type is already set by modify_lchan() */
1026                 p_g_payload_type = param->connectinfo.rtpinfo.payload_types[0];
1027                 send_mncc_rtp_connect();
1028         }
1029 }
1030
1031 /* MESSAGE_DISCONNECT */
1032 void Pgsm::message_disconnect(unsigned int epoint_id, int message_id, union parameter *param)
1033 {
1034         struct gsm_mncc *mncc;
1035
1036         /* send disconnect */
1037         mncc = create_mncc(MNCC_DISC_REQ, p_g_callref);
1038         gsm_trace_header(p_interface_name, this, MNCC_DISC_REQ, DIRECTION_OUT);
1039         if (p_g_tones) {
1040                 mncc->fields |= MNCC_F_PROGRESS;
1041                 mncc->progress.coding = 3; /* GSM */
1042                 mncc->progress.location = 1;
1043                 mncc->progress.descr = 8;
1044                 add_trace("progress", "coding", "%d", mncc->progress.coding);
1045                 add_trace("progress", "location", "%d", mncc->progress.location);
1046                 add_trace("progress", "descr", "%d", mncc->progress.descr);
1047         }
1048         mncc->fields |= MNCC_F_CAUSE;
1049         mncc->cause.coding = 3;
1050         mncc->cause.location = param->disconnectinfo.location;
1051         mncc->cause.value = param->disconnectinfo.cause;
1052         add_trace("cause", "coding", "%d", mncc->cause.coding);
1053         add_trace("cause", "location", "%d", mncc->cause.location);
1054         add_trace("cause", "value", "%d", mncc->cause.value);
1055         end_trace();
1056         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1057
1058         new_state(PORT_STATE_OUT_DISCONNECT);
1059
1060         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
1061                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
1062                 end_trace();
1063                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
1064                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1065                 p_g_tch_connected = 1;
1066         }
1067 }
1068
1069
1070 /* MESSAGE_RELEASE */
1071 void Pgsm::message_release(unsigned int epoint_id, int message_id, union parameter *param)
1072 {
1073         struct gsm_mncc *mncc;
1074
1075         /* send release */
1076         mncc = create_mncc(MNCC_REL_REQ, p_g_callref);
1077         gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
1078         mncc->fields |= MNCC_F_CAUSE;
1079         mncc->cause.coding = 3;
1080         mncc->cause.location = param->disconnectinfo.location;
1081         mncc->cause.value = param->disconnectinfo.cause;
1082         add_trace("cause", "coding", "%d", mncc->cause.coding);
1083         add_trace("cause", "location", "%d", mncc->cause.location);
1084         add_trace("cause", "value", "%d", mncc->cause.value);
1085         end_trace();
1086         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1087
1088         new_state(PORT_STATE_RELEASE);
1089         trigger_work(&p_g_delete);
1090         return;
1091 }
1092
1093 /*
1094  * endpoint sends messages to the port
1095  */
1096 int Pgsm::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
1097 {
1098         int ret = 0;
1099
1100         if (Port::message_epoint(epoint_id, message_id, param))
1101                 return 1;
1102
1103         switch(message_id) {
1104                 case MESSAGE_NOTIFY: /* display and notifications */
1105                 ret = 1;
1106                 message_notify(epoint_id, message_id, param);
1107                 break;
1108
1109 //              case MESSAGE_FACILITY: /* facility message */
1110 //              message_facility(epoint_id, message_id, param);
1111 //              break;
1112
1113                 case MESSAGE_PROCEEDING: /* message not handles */
1114                 ret = 1;
1115                 break;
1116
1117                 case MESSAGE_PROGRESS:
1118                 ret = 1;
1119                 message_progress(epoint_id, message_id, param);
1120                 break;
1121
1122                 case MESSAGE_ALERTING: /* call of endpoint is ringing */
1123                 ret = 1;
1124                 if (p_state!=PORT_STATE_IN_PROCEEDING)
1125                         break;
1126                 message_alerting(epoint_id, message_id, param);
1127                 if (p_g_notify_pending) {
1128                         /* send pending notify message during connect */
1129                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
1130                         message_free(p_g_notify_pending);
1131                         p_g_notify_pending = NULL;
1132                 }
1133                 break;
1134
1135                 case MESSAGE_CONNECT: /* call of endpoint is connected */
1136                 ret = 1;
1137                 if (p_state!=PORT_STATE_IN_PROCEEDING
1138                  && p_state!=PORT_STATE_IN_ALERTING)
1139                         break;
1140                 message_connect(epoint_id, message_id, param);
1141                 if (p_g_notify_pending) {
1142                         /* send pending notify message during connect */
1143                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
1144                         message_free(p_g_notify_pending);
1145                         p_g_notify_pending = NULL;
1146                 }
1147                 break;
1148
1149                 case MESSAGE_DISCONNECT: /* call has been disconnected */
1150                 ret = 1;
1151                 if (p_state!=PORT_STATE_IN_PROCEEDING
1152                  && p_state!=PORT_STATE_IN_ALERTING
1153                  && p_state!=PORT_STATE_OUT_SETUP
1154                  && p_state!=PORT_STATE_OUT_OVERLAP
1155                  && p_state!=PORT_STATE_OUT_PROCEEDING
1156                  && p_state!=PORT_STATE_OUT_ALERTING
1157                  && p_state!=PORT_STATE_CONNECT
1158                  && p_state!=PORT_STATE_CONNECT_WAITING)
1159                         break;
1160                 message_disconnect(epoint_id, message_id, param);
1161                 break;
1162
1163                 case MESSAGE_RELEASE: /* release isdn port */
1164                 ret = 1;
1165                 if (p_state==PORT_STATE_RELEASE)
1166                         break;
1167                 message_release(epoint_id, message_id, param);
1168                 break;
1169
1170         }
1171
1172         return ret;
1173 }
1174
1175 /* deletes only if l3id is release, otherwhise it will be triggered then */
1176 static int delete_event(struct lcr_work *work, void *instance, int index)
1177 {
1178         class Pgsm *gsmport = (class Pgsm *)instance;
1179
1180         delete gsmport;
1181
1182         return 0;
1183 }
1184
1185 int gsm_exit(int rc)
1186 {
1187         return(rc);
1188 }
1189
1190 int gsm_init(void)
1191 {
1192         /* seed the PRNG */
1193         srand(time(NULL));
1194
1195         return 0;
1196 }
1197
1198 /*
1199  * MNCC interface
1200  */
1201
1202 static int mncc_q_enqueue(struct lcr_gsm *lcr_gsm, struct gsm_mncc *mncc, unsigned int len)
1203 {
1204         struct mncc_q_entry *qe;
1205
1206         qe = (struct mncc_q_entry *) MALLOC(sizeof(*qe)+sizeof(*mncc)+len);
1207         if (!qe)
1208                 return -ENOMEM;
1209
1210         qe->next = NULL;
1211         qe->len = len;
1212         memcpy(qe->data, mncc, len);
1213
1214         /* in case of empty list ... */
1215         if (!lcr_gsm->mncc_q_hd && !lcr_gsm->mncc_q_tail) {
1216                 /* the list head and tail both point to the new qe */
1217                 lcr_gsm->mncc_q_hd = lcr_gsm->mncc_q_tail = qe;
1218         } else {
1219                 /* append to tail of list */
1220                 lcr_gsm->mncc_q_tail->next = qe;
1221                 lcr_gsm->mncc_q_tail = qe;
1222         }
1223
1224         lcr_gsm->mncc_lfd.when |= LCR_FD_WRITE;
1225
1226         return 0;
1227 }
1228
1229 static struct mncc_q_entry *mncc_q_dequeue(struct lcr_gsm *lcr_gsm)
1230 {
1231         struct mncc_q_entry *qe = lcr_gsm->mncc_q_hd;
1232         if (!qe)
1233                 return NULL;
1234
1235         /* dequeue the successfully sent message */
1236         lcr_gsm->mncc_q_hd = qe->next;
1237         if (!qe)
1238                 return NULL;
1239         if (qe == lcr_gsm->mncc_q_tail)
1240                 lcr_gsm->mncc_q_tail = NULL;
1241
1242         return qe;
1243 }
1244
1245 /* routine called by LCR code if it wants to send a message to OpenBSC */
1246 static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data)
1247 {
1248         int len = 0;
1249
1250         /* FIXME: the caller should provide this */
1251         switch (msg_type) {
1252         case GSM_TCHF_FRAME:
1253                 len = sizeof(struct gsm_data_frame) + 33;
1254                 break;
1255         default:
1256                 len = sizeof(struct gsm_mncc);
1257                 break;
1258         }
1259
1260         return mncc_q_enqueue(lcr_gsm, (struct gsm_mncc *)data, len);
1261 }
1262
1263 /* close MNCC socket */
1264 static int mncc_fd_close(struct lcr_gsm *lcr_gsm, struct lcr_fd *lfd)
1265 {
1266         class Port *port;
1267         class Pgsm *pgsm = NULL;
1268         struct lcr_msg *message;
1269
1270         PERROR("Lost MNCC socket, retrying in %u seconds\n", SOCKET_RETRY_TIMER);
1271         close(lfd->fd);
1272         unregister_fd(lfd);
1273         lfd->fd = -1;
1274
1275         /* free all the calls that were running through the MNCC interface */
1276         port = port_first;
1277         while(port) {
1278                 if ((port->p_type & PORT_CLASS_mISDN_MASK) == PORT_CLASS_GSM) {
1279                         pgsm = (class Pgsm *)port;
1280                         if (pgsm->p_g_lcr_gsm == lcr_gsm) {
1281                                 message = message_create(pgsm->p_serial, ACTIVE_EPOINT(pgsm->p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
1282                                 message->param.disconnectinfo.cause = 27; // temp. unavail.
1283                                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
1284                                 message_put(message);
1285                                 pgsm->new_state(PORT_STATE_RELEASE);
1286                                 trigger_work(&pgsm->p_g_delete);
1287                         }
1288                 }
1289                 port = port->next;
1290         }
1291
1292         /* flush the queue */
1293         while (mncc_q_dequeue(lcr_gsm))
1294                 ;
1295
1296         /* start the re-connect timer */
1297         schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1298
1299         return 0;
1300 }
1301
1302 /* write to OpenBSC via MNCC socket */
1303 static int mncc_fd_write(struct lcr_fd *lfd, void *inst, int idx)
1304 {
1305         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1306         struct mncc_q_entry *qe, *qe2;
1307         int rc;
1308
1309         while (1) {
1310                 qe = lcr_gsm->mncc_q_hd;
1311                 if (!qe) {
1312                         lfd->when &= ~LCR_FD_WRITE;
1313                         break;
1314                 }
1315                 rc = write(lfd->fd, qe->data, qe->len);
1316                 if (rc == 0)
1317                         return mncc_fd_close(lcr_gsm, lfd);
1318                 if (rc < 0)
1319                         return rc;
1320                 if (rc < (int)qe->len)
1321                         return -1;
1322                 /* dequeue the successfully sent message */
1323                 qe2 = mncc_q_dequeue(lcr_gsm);
1324                 assert(qe == qe2);
1325                 free(qe);
1326         }
1327         return 0;
1328 }
1329
1330 /* read from OpenBSC via MNCC socket */
1331 static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
1332 {
1333         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1334         int rc;
1335         static char buf[sizeof(struct gsm_mncc)+1024];
1336         struct gsm_mncc *mncc_prim = (struct gsm_mncc *) buf;
1337
1338         memset(buf, 0, sizeof(buf));
1339         rc = recv(lfd->fd, buf, sizeof(buf), 0);
1340         if (rc == 0)
1341                 return mncc_fd_close(lcr_gsm, lfd);
1342         if (rc < 0)
1343                 return rc;
1344
1345         /* Hand the MNCC message into LCR */
1346         switch (lcr_gsm->type) {
1347 #ifdef WITH_GSM_BS
1348         case LCR_GSM_TYPE_NETWORK:
1349                 return message_bsc(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1350 #endif
1351 #ifdef WITH_GSM_MS
1352         case LCR_GSM_TYPE_MS:
1353                 return message_ms(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1354 #endif
1355         default:
1356                 return 0;
1357         }
1358 }
1359
1360 /* file descriptor callback if we can read or write form MNCC socket */
1361 static int mncc_fd_cb(struct lcr_fd *lfd, unsigned int what, void *inst, int idx)
1362 {
1363         int rc = 0;
1364
1365         if (what & LCR_FD_READ)
1366                 rc = mncc_fd_read(lfd, inst, idx);
1367         if (rc < 0)
1368                 return rc;
1369
1370         if (what & LCR_FD_WRITE)
1371                 rc = mncc_fd_write(lfd, inst, idx);
1372
1373         return rc;
1374 }
1375
1376 int mncc_socket_retry_cb(struct lcr_timer *timer, void *inst, int index)
1377 {
1378         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1379         int fd, rc;
1380
1381         lcr_gsm->mncc_lfd.fd = -1;
1382
1383         fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
1384         if (fd < 0) {
1385                 PERROR("Cannot create SEQPACKET socket, giving up!\n");
1386                 return fd;
1387         }
1388
1389         rc = connect(fd, (struct sockaddr *) &lcr_gsm->sun,
1390                      sizeof(lcr_gsm->sun));
1391         if (rc < 0) {
1392                 PERROR("Could not connect to MNCC socket %s, "
1393                         "retrying in %u seconds\n", lcr_gsm->sun.sun_path,
1394                         SOCKET_RETRY_TIMER);
1395                 close(fd);
1396                 schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1397         } else {
1398                 PDEBUG(DEBUG_GSM, "Connected to MNCC socket %s!\n", lcr_gsm->sun.sun_path);
1399                 lcr_gsm->mncc_lfd.fd = fd;
1400                 register_fd(&lcr_gsm->mncc_lfd, LCR_FD_READ, &mncc_fd_cb, lcr_gsm, 0);
1401         }
1402
1403         return 0;
1404 }
1405