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         int ret;
 416
 417         if ((ret = Port::bridge_rx(data, len)))
 418                 return ret;
 419
 420         if (p_tone_name[0])
 421                 return -EINVAL;
 422
 423         return audio_send(data, len);
 424 }
 425
 426 int Pgsm::audio_send(unsigned char *data, int len)
 427 {
 428         unsigned char frame[33];
 429         int ret;
 430
 431         /* record data */
 432         if (p_record)
 433                 record(data, len, 1); // from up
 434         if (p_tap)
 435                 tap(data, len, 1); // from up
 436
 437         /* (currently) not connected, so don't flood tch! */
 438         if (!p_g_tch_connected)
 439                 return -EINVAL;
 440
 441         /* write to rx buffer */
 442         while(len--) {
 443                 p_g_rxdata[p_g_rxpos++] = audio_law_to_s32[*data++];
 444                 if (p_g_rxpos != 160)
 445                         continue;
 446                 p_g_rxpos = 0;
 447
 448                 switch (p_g_media_type) {
 449                 case MEDIA_TYPE_GSM:
 450                         if (!p_g_fr_encoder) {
 451                                 PERROR("FR frame, but encoder not created.\n");
 452                                 break;
 453                         }
 454 #ifdef WITH_GSMFR
 455                         /* encode data */
 456                         gsm_fr_encode(p_g_fr_encoder, p_g_rxdata, frame);
 457                         frame_send(frame, 33, GSM_TCHF_FRAME);
 458 #endif
 459                         break;
 460                 case MEDIA_TYPE_GSM_HR:
 461                         if (!p_g_hr_encoder) {
 462                                 PERROR("HR frame, but encoder not created.\n");
 463                                 break;
 464                         }
 465 #ifdef WITH_GSMHR
 466                         /* encode data */
 467                         gsm_hr_encode(p_g_hr_encoder, p_g_rxdata, frame);
 468                         frame_send(frame, 15, GSM_TCHH_FRAME);
 469 #endif
 470                         break;
 471                 case MEDIA_TYPE_GSM_EFR:
 472                         if (!p_g_amr_encoder) {
 473                                 PERROR("EFR frame, but encoder not created.\n");
 474                                 break;
 475                         }
 476 #ifdef WITH_GSMAMR
 477                         /* encode data */
 478                         gsm_efr_encode(p_g_amr_encoder, p_g_rxdata, frame);
 479                         frame_send(frame, 31, GSM_TCHF_FRAME_EFR);
 480 #endif
 481                         break;
 482                 case MEDIA_TYPE_AMR:
 483                         if (!p_g_amr_encoder) {
 484                                 PERROR("AMR frame, but encoder not created.\n");
 485                                 break;
 486                         }
 487                         if (!p_g_amr_cmr_valid) {
 488                                 PDEBUG(DEBUG_GSM, "no valid CMR yet.\n");
 489                                 break;
 490                         }
 491 #ifdef WITH_GSMAMR
 492                         /* encode data (prefix a length byte) */
 493                         ret = gsm_amr_encode(p_g_amr_encoder, p_g_rxdata, frame + 1, p_g_amr_cmr);
 494                         frame[0] = ret;
 495                         frame_send(frame, ret + 1, GSM_TCH_FRAME_AMR);
 496 #endif
 497                         break;
 498                 }
 499         }
 500
 501         return 0;
 502 }
 503
 504 void Pgsm::frame_send(void *_frame, int len, int msg_type)
 505 {
 506         unsigned char buffer[sizeof(struct gsm_data_frame) + len];
 507         struct gsm_data_frame *frame = (struct gsm_data_frame *)buffer;
 508
 509         frame->msg_type = msg_type;
 510         frame->callref = p_g_callref;
 511         memcpy(frame->data, _frame, len);
 512
 513         if (p_g_lcr_gsm) {
 514                 mncc_send(p_g_lcr_gsm, frame->msg_type, frame);
 515         }
 516 }
 517
 518 /*
 519  * create trace
 520  */
 521 void gsm_trace_header(const char *interface_name, class Pgsm *port, unsigned int msg_type, int direction)
 522 {
 523         char msgtext[64];
 524         struct interface *interface = interface_first;
 525
 526         interface = getinterfacebyname(interface_name);
 527         if (!interface)
 528                 return;
 529
 530         /* select message and primitive text */
 531         SCPY(msgtext, mncc_name(msg_type));
 532
 533         /* add direction */
 534         if (port) {
 535                 switch(port->p_type) {
 536                 case PORT_TYPE_GSM_BS_OUT:
 537                 case PORT_TYPE_GSM_BS_IN:
 538                         SCAT(msgtext, " LCR<->BSC");
 539                         break;
 540                 case PORT_TYPE_GSM_MS_OUT:
 541                 case PORT_TYPE_GSM_MS_IN:
 542                         SCAT(msgtext, " LCR<->MS");
 543                         break;
 544                 }
 545         } else
 546                 SCAT(msgtext, " ----");
 547
 548         /* init trace with given values */
 549         start_trace(-1,
 550                     interface,
 551                     port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
 552                     port?port->p_dialinginfo.id:NULL,
 553                     direction,
 554                     CATEGORY_CH,
 555                     port?port->p_serial:0,
 556                     msgtext);
 557 }
 558
 559 /* modify lchan to given payload type */
 560 void Pgsm::modify_lchan(int media_type)
 561 {
 562         struct gsm_mncc *mode;
 563
 564         /* already modified to that media type */
 565         if (p_g_media_type == media_type)
 566                 return;
 567
 568         p_g_media_type = media_type;
 569         gsm_trace_header(p_interface_name, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
 570         mode = create_mncc(MNCC_LCHAN_MODIFY, p_g_callref);
 571         switch (media_type) {
 572         case MEDIA_TYPE_GSM_EFR:
 573                 add_trace("speech", "version", "EFR given");
 574                 mode->lchan_mode = 0x21; /* GSM V2 */
 575                 mode->lchan_type = 0x02; /* TCH/F */
 576                 break;
 577         case MEDIA_TYPE_AMR:
 578                 add_trace("speech", "version", "AMR given");
 579                 mode->lchan_mode = 0x41; /* GSM V3 */
 580                 /* as we don't know the available channels, this type will be set by openbsc automatically */
 581                 mode->lchan_type = 0x02; /* TCH/F */
 582                 break;
 583         case MEDIA_TYPE_GSM_HR:
 584                 add_trace("speech", "version", "Half Rate given");
 585                 mode->lchan_mode = 0x01; /* GSM V1 */
 586                 mode->lchan_type = 0x03; /* TCH/H */
 587         default:
 588                 add_trace("speech", "version", "Full Rate given");
 589                 mode->lchan_mode = 0x01; /* GSM V1 */
 590                 mode->lchan_type = 0x02; /* TCH/F */
 591         }
 592         add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
 593         end_trace();
 594         send_and_free_mncc(p_g_lcr_gsm, mode->msg_type, mode);
 595 }
 596
 597 /* CALL PROCEEDING INDICATION (from network) */
 598 void Pgsm::call_proc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 599 {
 600         struct lcr_msg *message;
 601         struct gsm_mncc *frame;
 602
 603         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 604         end_trace();
 605
 606         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
 607         message_put(message);
 608
 609         new_state(PORT_STATE_OUT_PROCEEDING);
 610
 611         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 612                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 613                 end_trace();
 614                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 615                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 616                 p_g_tch_connected = 1;
 617         }
 618
 619         /* modify to GSM FR (this is GSM user side only, so there is FR supported only) */
 620         modify_lchan(MEDIA_TYPE_GSM);
 621 }
 622
 623 /* ALERTING INDICATION */
 624 void Pgsm::alert_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 625 {
 626         struct lcr_msg *message;
 627         struct gsm_mncc *frame;
 628
 629         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 630         end_trace();
 631
 632         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_ALERTING);
 633         message_put(message);
 634
 635         new_state(PORT_STATE_OUT_ALERTING);
 636
 637         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 638                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 639                 end_trace();
 640                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 641                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 642                 p_g_tch_connected = 1;
 643         }
 644
 645         /* modify to GSM FR, if not already */
 646         if (!p_g_media_type) {
 647                 modify_lchan(MEDIA_TYPE_GSM);
 648         }
 649 }
 650
 651 /* CONNECT INDICATION */
 652 void Pgsm::setup_cnf(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 653 {
 654         struct gsm_mncc *resp, *frame;
 655         struct lcr_msg *message;
 656
 657         SCPY(p_connectinfo.id, mncc->connected.number);
 658         SCPY(p_connectinfo.imsi, mncc->imsi);
 659         p_connectinfo.present = INFO_PRESENT_ALLOWED;
 660         p_connectinfo.screen = INFO_SCREEN_NETWORK;
 661         p_connectinfo.ntype = INFO_NTYPE_UNKNOWN;
 662         SCPY(p_connectinfo.interface, p_interface_name);
 663
 664         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 665         if (p_connectinfo.id[0])
 666                 add_trace("connect", "number", "%s", p_connectinfo.id);
 667         else if (mncc->imsi[0])
 668                 SPRINT(p_connectinfo.id, "imsi-%s", p_connectinfo.imsi);
 669         if (mncc->imsi[0])
 670                 add_trace("connect", "imsi", "%s", p_connectinfo.imsi);
 671         end_trace();
 672
 673         /* send resp */
 674         gsm_trace_header(p_interface_name, this, MNCC_SETUP_COMPL_REQ, DIRECTION_OUT);
 675         resp = create_mncc(MNCC_SETUP_COMPL_REQ, p_g_callref);
 676         end_trace();
 677         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 678
 679         new_state(PORT_STATE_CONNECT);
 680
 681         if (!p_g_tch_connected) { /* only if ... */
 682                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 683                 end_trace();
 684                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 685                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 686                 p_g_tch_connected = 1;
 687         }
 688
 689         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
 690         memcpy(&message->param.connectinfo, &p_connectinfo, sizeof(struct connect_info));
 691
 692         /* if we have a bridge, but not yet modified, the phone accepts out requested payload.
 693          * we force the first in list */
 694         if (p_g_rtp_bridge) {
 695                 if (!p_g_media_type) {
 696                         /* modify to first given type */
 697                         modify_lchan(p_g_rtp_media_types[0]);
 698                         /* also set payload type */
 699                         p_g_payload_type = p_g_rtp_payload_types[0];
 700                 }
 701                 message->param.connectinfo.rtpinfo.media_types[0] = p_g_media_type;
 702                 message->param.connectinfo.rtpinfo.payload_types[0] = p_g_payload_type;
 703                 message->param.connectinfo.rtpinfo.payloads = 1;
 704         } else {
 705                 /* modify to GSM FR, if not already
 706                 * for network side, this should have been already happened */
 707                 if (!p_g_media_type)
 708                         modify_lchan(MEDIA_TYPE_GSM);
 709         }
 710
 711
 712         if (p_g_rtp_bridge) {
 713                 struct gsm_mncc_rtp *rtp;
 714
 715                 PDEBUG(DEBUG_GSM, "Request RTP peer info, before forwarding connect msg\n");
 716                 p_g_connect_pending = message;
 717                 rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CREATE, p_g_callref);
 718                 send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
 719         } else
 720                 message_put(message);
 721 }
 722
 723 /* CONNECT ACK INDICATION */
 724 void Pgsm::setup_compl_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 725 {
 726         struct gsm_mncc *frame;
 727
 728         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 729         end_trace();
 730
 731         new_state(PORT_STATE_CONNECT);
 732
 733         if (!p_g_tch_connected) { /* only if ... */
 734                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 735                 end_trace();
 736                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 737                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 738                 p_g_tch_connected = 1;
 739         }
 740
 741         /* modify to GSM FR, if not already */
 742         if (!p_g_media_type) {
 743                 modify_lchan(MEDIA_TYPE_GSM);
 744         }
 745 }
 746
 747 /* DISCONNECT INDICATION */
 748 void Pgsm::disc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 749 {
 750         struct lcr_msg *message;
 751         int cause = 16, location = 0;
 752         struct gsm_mncc *resp;
 753
 754         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 755         if (mncc->fields & MNCC_F_CAUSE) {
 756                 location = mncc->cause.location;
 757                 cause = mncc->cause.value;
 758                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 759                 add_trace("cause", "location", "%d", location);
 760                 add_trace("cause", "value", "%d", cause);
 761         }
 762         end_trace();
 763
 764         /* send release */
 765         resp = create_mncc(MNCC_REL_REQ, p_g_callref);
 766         gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
 767 #if 0
 768         resp->fields |= MNCC_F_CAUSE;
 769         resp->cause.coding = 3;
 770         resp->cause.location = 1;
 771         resp->cause.value = cause;
 772         add_trace("cause", "coding", "%d", resp->cause.coding);
 773         add_trace("cause", "location", "%d", resp->cause.location);
 774         add_trace("cause", "value", "%d", resp->cause.value);
 775 #endif
 776         end_trace();
 777         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 778
 779         /* sending release to endpoint */
 780         while(p_epointlist) {
 781                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 782                 message->param.disconnectinfo.cause = cause;
 783                 message->param.disconnectinfo.location = location;
 784                 message_put(message);
 785                 /* remove epoint */
 786                 free_epointlist(p_epointlist);
 787         }
 788         new_state(PORT_STATE_RELEASE);
 789         trigger_work(&p_g_delete);
 790 }
 791
 792 /* CC_RELEASE INDICATION */
 793 void Pgsm::rel_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 794 {
 795         int location = 0, cause = 16;
 796         struct lcr_msg *message;
 797
 798         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 799         if (mncc->fields & MNCC_F_CAUSE) {
 800                 location = mncc->cause.location;
 801                 cause = mncc->cause.value;
 802                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 803                 add_trace("cause", "location", "%d", mncc->cause.location);
 804                 add_trace("cause", "value", "%d", mncc->cause.value);
 805         }
 806         end_trace();
 807
 808         /* sending release to endpoint */
 809         while(p_epointlist) {
 810                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 811                 message->param.disconnectinfo.cause = cause;
 812                 message->param.disconnectinfo.location = location;
 813                 message_put(message);
 814                 /* remove epoint */
 815                 free_epointlist(p_epointlist);
 816         }
 817         new_state(PORT_STATE_RELEASE);
 818         trigger_work(&p_g_delete);
 819 }
 820
 821 /* NOTIFY INDICATION */
 822 void Pgsm::notify_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 823 {
 824         struct lcr_msg *message;
 825
 826         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 827         add_trace("notify", NULL, "%d", mncc->notify);
 828         end_trace();
 829
 830         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 831         message->param.notifyinfo.notify = mncc->notify;
 832         message_put(message);
 833 }
 834
 835 /* MESSAGE_NOTIFY */
 836 void Pgsm::message_notify(unsigned int epoint_id, int message_id, union parameter *param)
 837 {
 838         struct gsm_mncc *mncc;
 839         int notify;
 840
 841 //      printf("if = %d\n", param->notifyinfo.notify);
 842         if (param->notifyinfo.notify>INFO_NOTIFY_NONE) {
 843                 notify = param->notifyinfo.notify & 0x7f;
 844                 if (p_state!=PORT_STATE_CONNECT /*&& p_state!=PORT_STATE_IN_PROCEEDING*/ && p_state!=PORT_STATE_IN_ALERTING) {
 845                         /* queue notification */
 846                         if (p_g_notify_pending)
 847                                 message_free(p_g_notify_pending);
 848                         p_g_notify_pending = message_create(ACTIVE_EPOINT(p_epointlist), p_serial, EPOINT_TO_PORT, message_id);
 849                         memcpy(&p_g_notify_pending->param, param, sizeof(union parameter));
 850                 } else {
 851                         /* sending notification */
 852                         gsm_trace_header(p_interface_name, this, MNCC_NOTIFY_REQ, DIRECTION_OUT);
 853                         add_trace("notify", NULL, "%d", notify);
 854                         end_trace();
 855                         mncc = create_mncc(MNCC_NOTIFY_REQ, p_g_callref);
 856                         mncc->notify = notify;
 857                         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 858                 }
 859         }
 860 }
 861
 862 /* RTP create indication */
 863 void Pgsm::rtp_create_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 864 {
 865         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 866
 867         /* send queued setup, as we received remote RTP info */
 868         if (p_g_setup_pending) {
 869                 struct lcr_msg *message;
 870
 871                 message = p_g_setup_pending;
 872                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding setup\n", rtp->ip, rtp->port);
 873                 message->param.setup.rtpinfo.ip = rtp->ip;
 874                 message->param.setup.rtpinfo.port = rtp->port;
 875                 message_put(message);
 876                 p_g_setup_pending = NULL;
 877         }
 878         if (p_g_connect_pending) {
 879                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) connecting RTP... \n", rtp->ip, rtp->port);
 880                 send_mncc_rtp_connect();
 881         }
 882 }
 883
 884 /* RTP connect indication */
 885 void Pgsm::rtp_connect_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 886 {
 887         struct lcr_msg *message;
 888         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 889
 890         if (p_g_connect_pending) {
 891                 message = p_g_connect_pending;
 892                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding connect\n", rtp->ip, rtp->port);
 893                 message->param.connectinfo.rtpinfo.ip = rtp->ip;
 894                 message->param.connectinfo.rtpinfo.port = rtp->port;
 895                 message_put(message);
 896                 p_g_connect_pending = NULL;
 897         }
 898 }
 899
 900 /* MESSAGE_PROGRESS */
 901 void Pgsm::message_progress(unsigned int epoint_id, int message_id, union parameter *param)
 902 {
 903         if (param->progressinfo.progress == 8) {
 904                 PDEBUG(DEBUG_GSM, "Remote provides tones for us\n");
 905                 p_g_tones = 1;
 906         }
 907
 908         if (param->progressinfo.rtpinfo.port) {
 909                 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]);
 910
 911                 /* modify channel to givne type, also sets media type */
 912                 modify_lchan(param->progressinfo.rtpinfo.media_types[0]);
 913
 914                 /* connect RTP */
 915                 p_g_rtp_ip_remote = param->progressinfo.rtpinfo.ip;
 916                 p_g_rtp_port_remote = param->progressinfo.rtpinfo.port;
 917                 /* p_g_media_type is already set by modify_lchan() */
 918                 p_g_payload_type = param->progressinfo.rtpinfo.payload_types[0];
 919                 send_mncc_rtp_connect();
 920         }
 921 }
 922
 923 /* MESSAGE_ALERTING */
 924 void Pgsm::message_alerting(unsigned int epoint_id, int message_id, union parameter *param)
 925 {
 926         struct gsm_mncc *mncc;
 927
 928         /* send alert */
 929         gsm_trace_header(p_interface_name, this, MNCC_ALERT_REQ, DIRECTION_OUT);
 930         mncc = create_mncc(MNCC_ALERT_REQ, p_g_callref);
 931         if (p_g_tones) {
 932                 mncc->fields |= MNCC_F_PROGRESS;
 933                 mncc->progress.coding = 3; /* GSM */
 934                 mncc->progress.location = 1;
 935                 mncc->progress.descr = 8;
 936                 add_trace("progress", "coding", "%d", mncc->progress.coding);
 937                 add_trace("progress", "location", "%d", mncc->progress.location);
 938                 add_trace("progress", "descr", "%d", mncc->progress.descr);
 939         }
 940         end_trace();
 941         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 942
 943         new_state(PORT_STATE_IN_ALERTING);
 944
 945         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
 946                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 947                 end_trace();
 948                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 949                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 950                 p_g_tch_connected = 1;
 951         }
 952
 953         /* modify to GSM FR, if not already */
 954         if (!p_g_media_type) {
 955                 modify_lchan(MEDIA_TYPE_GSM);
 956         }
 957 }
 958
 959 /* MESSAGE_CONNECT */
 960 void Pgsm::message_connect(unsigned int epoint_id, int message_id, union parameter *param)
 961 {
 962         struct gsm_mncc *mncc;
 963
 964         /* copy connected information */
 965         memcpy(&p_connectinfo, &param->connectinfo, sizeof(p_connectinfo));
 966         /* screen outgoing caller id */
 967         do_screen(1, p_connectinfo.id, sizeof(p_connectinfo.id), &p_connectinfo.ntype, &p_connectinfo.present, p_interface_name);
 968
 969         /* send connect */
 970         mncc = create_mncc(MNCC_SETUP_RSP, p_g_callref);
 971         gsm_trace_header(p_interface_name, this, MNCC_SETUP_RSP, DIRECTION_OUT);
 972         /* caller information */
 973         mncc->fields |= MNCC_F_CONNECTED;
 974         mncc->connected.plan = 1;
 975         switch (p_callerinfo.ntype) {
 976                 case INFO_NTYPE_UNKNOWN:
 977                 mncc->connected.type = 0x0;
 978                 break;
 979                 case INFO_NTYPE_INTERNATIONAL:
 980                 mncc->connected.type = 0x1;
 981                 break;
 982                 case INFO_NTYPE_NATIONAL:
 983                 mncc->connected.type = 0x2;
 984                 break;
 985                 case INFO_NTYPE_SUBSCRIBER:
 986                 mncc->connected.type = 0x4;
 987                 break;
 988                 default: /* INFO_NTYPE_NOTPRESENT */
 989                 mncc->fields &= ~MNCC_F_CONNECTED;
 990                 break;
 991         }
 992         switch (p_callerinfo.screen) {
 993                 case INFO_SCREEN_USER:
 994                 mncc->connected.screen = 0;
 995                 break;
 996                 default: /* INFO_SCREEN_NETWORK */
 997                 mncc->connected.screen = 3;
 998                 break;
 999         }
1000         switch (p_callerinfo.present) {
1001                 case INFO_PRESENT_ALLOWED:
1002                 mncc->connected.present = 0;
1003                 break;
1004                 case INFO_PRESENT_RESTRICTED:
1005                 mncc->connected.present = 1;
1006                 break;
1007                 default: /* INFO_PRESENT_NOTAVAIL */
1008                 mncc->connected.present = 2;
1009                 break;
1010         }
1011         if (mncc->fields & MNCC_F_CONNECTED) {
1012                 SCPY(mncc->connected.number, p_connectinfo.id);
1013                 add_trace("connected", "type", "%d", mncc->connected.type);
1014                 add_trace("connected", "plan", "%d", mncc->connected.plan);
1015                 add_trace("connected", "present", "%d", mncc->connected.present);
1016                 add_trace("connected", "screen", "%d", mncc->connected.screen);
1017                 add_trace("connected", "number", "%s", mncc->connected.number);
1018         }
1019         end_trace();
1020         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1021
1022         new_state(PORT_STATE_CONNECT_WAITING);
1023
1024         if (param->connectinfo.rtpinfo.port) {
1025                 PDEBUG(DEBUG_GSM, "CONNECT with RTP peer info, sent to BSC (%08x,%d)\n", param->connectinfo.rtpinfo.ip, param->connectinfo.rtpinfo.port);
1026
1027                 /* modify channel to givne type, also sets media type */
1028                 modify_lchan(param->connectinfo.rtpinfo.media_types[0]);
1029
1030                 /* connect RTP */
1031                 p_g_rtp_ip_remote = param->connectinfo.rtpinfo.ip;
1032                 p_g_rtp_port_remote = param->connectinfo.rtpinfo.port;
1033                 /* p_g_media_type is already set by modify_lchan() */
1034                 p_g_payload_type = param->connectinfo.rtpinfo.payload_types[0];
1035                 send_mncc_rtp_connect();
1036         }
1037 }
1038
1039 /* MESSAGE_DISCONNECT */
1040 void Pgsm::message_disconnect(unsigned int epoint_id, int message_id, union parameter *param)
1041 {
1042         struct gsm_mncc *mncc;
1043
1044         /* send disconnect */
1045         mncc = create_mncc(MNCC_DISC_REQ, p_g_callref);
1046         gsm_trace_header(p_interface_name, this, MNCC_DISC_REQ, DIRECTION_OUT);
1047         if (p_g_tones) {
1048                 mncc->fields |= MNCC_F_PROGRESS;
1049                 mncc->progress.coding = 3; /* GSM */
1050                 mncc->progress.location = 1;
1051                 mncc->progress.descr = 8;
1052                 add_trace("progress", "coding", "%d", mncc->progress.coding);
1053                 add_trace("progress", "location", "%d", mncc->progress.location);
1054                 add_trace("progress", "descr", "%d", mncc->progress.descr);
1055         }
1056         mncc->fields |= MNCC_F_CAUSE;
1057         mncc->cause.coding = 3;
1058         mncc->cause.location = param->disconnectinfo.location;
1059         mncc->cause.value = param->disconnectinfo.cause;
1060         add_trace("cause", "coding", "%d", mncc->cause.coding);
1061         add_trace("cause", "location", "%d", mncc->cause.location);
1062         add_trace("cause", "value", "%d", mncc->cause.value);
1063         end_trace();
1064         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1065
1066         new_state(PORT_STATE_OUT_DISCONNECT);
1067
1068         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
1069                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
1070                 end_trace();
1071                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
1072                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1073                 p_g_tch_connected = 1;
1074         }
1075 }
1076
1077
1078 /* MESSAGE_RELEASE */
1079 void Pgsm::message_release(unsigned int epoint_id, int message_id, union parameter *param)
1080 {
1081         struct gsm_mncc *mncc;
1082
1083         /* send release */
1084         mncc = create_mncc(MNCC_REL_REQ, p_g_callref);
1085         gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
1086         mncc->fields |= MNCC_F_CAUSE;
1087         mncc->cause.coding = 3;
1088         mncc->cause.location = param->disconnectinfo.location;
1089         mncc->cause.value = param->disconnectinfo.cause;
1090         add_trace("cause", "coding", "%d", mncc->cause.coding);
1091         add_trace("cause", "location", "%d", mncc->cause.location);
1092         add_trace("cause", "value", "%d", mncc->cause.value);
1093         end_trace();
1094         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1095
1096         new_state(PORT_STATE_RELEASE);
1097         trigger_work(&p_g_delete);
1098         return;
1099 }
1100
1101 /*
1102  * endpoint sends messages to the port
1103  */
1104 int Pgsm::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
1105 {
1106         int ret = 0;
1107
1108         if (Port::message_epoint(epoint_id, message_id, param))
1109                 return 1;
1110
1111         switch(message_id) {
1112                 case MESSAGE_NOTIFY: /* display and notifications */
1113                 ret = 1;
1114                 message_notify(epoint_id, message_id, param);
1115                 break;
1116
1117 //              case MESSAGE_FACILITY: /* facility message */
1118 //              message_facility(epoint_id, message_id, param);
1119 //              break;
1120
1121                 case MESSAGE_PROCEEDING: /* message not handles */
1122                 ret = 1;
1123                 break;
1124
1125                 case MESSAGE_PROGRESS:
1126                 ret = 1;
1127                 message_progress(epoint_id, message_id, param);
1128                 break;
1129
1130                 case MESSAGE_ALERTING: /* call of endpoint is ringing */
1131                 ret = 1;
1132                 if (p_state!=PORT_STATE_IN_PROCEEDING)
1133                         break;
1134                 message_alerting(epoint_id, message_id, param);
1135                 if (p_g_notify_pending) {
1136                         /* send pending notify message during connect */
1137                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
1138                         message_free(p_g_notify_pending);
1139                         p_g_notify_pending = NULL;
1140                 }
1141                 break;
1142
1143                 case MESSAGE_CONNECT: /* call of endpoint is connected */
1144                 ret = 1;
1145                 if (p_state!=PORT_STATE_IN_PROCEEDING
1146                  && p_state!=PORT_STATE_IN_ALERTING)
1147                         break;
1148                 message_connect(epoint_id, message_id, param);
1149                 if (p_g_notify_pending) {
1150                         /* send pending notify message during connect */
1151                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
1152                         message_free(p_g_notify_pending);
1153                         p_g_notify_pending = NULL;
1154                 }
1155                 break;
1156
1157                 case MESSAGE_DISCONNECT: /* call has been disconnected */
1158                 ret = 1;
1159                 if (p_state!=PORT_STATE_IN_PROCEEDING
1160                  && p_state!=PORT_STATE_IN_ALERTING
1161                  && p_state!=PORT_STATE_OUT_SETUP
1162                  && p_state!=PORT_STATE_OUT_OVERLAP
1163                  && p_state!=PORT_STATE_OUT_PROCEEDING
1164                  && p_state!=PORT_STATE_OUT_ALERTING
1165                  && p_state!=PORT_STATE_CONNECT
1166                  && p_state!=PORT_STATE_CONNECT_WAITING)
1167                         break;
1168                 message_disconnect(epoint_id, message_id, param);
1169                 break;
1170
1171                 case MESSAGE_RELEASE: /* release isdn port */
1172                 ret = 1;
1173                 if (p_state==PORT_STATE_RELEASE)
1174                         break;
1175                 message_release(epoint_id, message_id, param);
1176                 break;
1177
1178         }
1179
1180         return ret;
1181 }
1182
1183 /* deletes only if l3id is release, otherwhise it will be triggered then */
1184 static int delete_event(struct lcr_work *work, void *instance, int index)
1185 {
1186         class Pgsm *gsmport = (class Pgsm *)instance;
1187
1188         delete gsmport;
1189
1190         return 0;
1191 }
1192
1193 int gsm_exit(int rc)
1194 {
1195         return(rc);
1196 }
1197
1198 int gsm_init(void)
1199 {
1200         /* seed the PRNG */
1201         srand(time(NULL));
1202
1203         return 0;
1204 }
1205
1206 /*
1207  * MNCC interface
1208  */
1209
1210 static int mncc_q_enqueue(struct lcr_gsm *lcr_gsm, struct gsm_mncc *mncc, unsigned int len)
1211 {
1212         struct mncc_q_entry *qe;
1213
1214         qe = (struct mncc_q_entry *) MALLOC(sizeof(*qe)+sizeof(*mncc)+len);
1215         if (!qe)
1216                 return -ENOMEM;
1217
1218         qe->next = NULL;
1219         qe->len = len;
1220         memcpy(qe->data, mncc, len);
1221
1222         /* in case of empty list ... */
1223         if (!lcr_gsm->mncc_q_hd && !lcr_gsm->mncc_q_tail) {
1224                 /* the list head and tail both point to the new qe */
1225                 lcr_gsm->mncc_q_hd = lcr_gsm->mncc_q_tail = qe;
1226         } else {
1227                 /* append to tail of list */
1228                 lcr_gsm->mncc_q_tail->next = qe;
1229                 lcr_gsm->mncc_q_tail = qe;
1230         }
1231
1232         lcr_gsm->mncc_lfd.when |= LCR_FD_WRITE;
1233
1234         return 0;
1235 }
1236
1237 static struct mncc_q_entry *mncc_q_dequeue(struct lcr_gsm *lcr_gsm)
1238 {
1239         struct mncc_q_entry *qe = lcr_gsm->mncc_q_hd;
1240         if (!qe)
1241                 return NULL;
1242
1243         /* dequeue the successfully sent message */
1244         lcr_gsm->mncc_q_hd = qe->next;
1245         if (!qe)
1246                 return NULL;
1247         if (qe == lcr_gsm->mncc_q_tail)
1248                 lcr_gsm->mncc_q_tail = NULL;
1249
1250         return qe;
1251 }
1252
1253 /* routine called by LCR code if it wants to send a message to OpenBSC */
1254 static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data)
1255 {
1256         int len = 0;
1257
1258         /* FIXME: the caller should provide this */
1259         switch (msg_type) {
1260         case GSM_TCHF_FRAME:
1261                 len = sizeof(struct gsm_data_frame) + 33;
1262                 break;
1263         default:
1264                 len = sizeof(struct gsm_mncc);
1265                 break;
1266         }
1267
1268         return mncc_q_enqueue(lcr_gsm, (struct gsm_mncc *)data, len);
1269 }
1270
1271 /* close MNCC socket */
1272 static int mncc_fd_close(struct lcr_gsm *lcr_gsm, struct lcr_fd *lfd)
1273 {
1274         class Port *port;
1275         class Pgsm *pgsm = NULL;
1276         struct lcr_msg *message;
1277
1278         PERROR("Lost MNCC socket, retrying in %u seconds\n", SOCKET_RETRY_TIMER);
1279         close(lfd->fd);
1280         unregister_fd(lfd);
1281         lfd->fd = -1;
1282
1283         /* free all the calls that were running through the MNCC interface */
1284         port = port_first;
1285         while(port) {
1286                 if ((port->p_type & PORT_CLASS_mISDN_MASK) == PORT_CLASS_GSM) {
1287                         pgsm = (class Pgsm *)port;
1288                         if (pgsm->p_g_lcr_gsm == lcr_gsm) {
1289                                 message = message_create(pgsm->p_serial, ACTIVE_EPOINT(pgsm->p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
1290                                 message->param.disconnectinfo.cause = 27; // temp. unavail.
1291                                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
1292                                 message_put(message);
1293                                 pgsm->new_state(PORT_STATE_RELEASE);
1294                                 trigger_work(&pgsm->p_g_delete);
1295                         }
1296                 }
1297                 port = port->next;
1298         }
1299
1300         /* flush the queue */
1301         while (mncc_q_dequeue(lcr_gsm))
1302                 ;
1303
1304         /* start the re-connect timer */
1305         schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1306
1307         return 0;
1308 }
1309
1310 /* write to OpenBSC via MNCC socket */
1311 static int mncc_fd_write(struct lcr_fd *lfd, void *inst, int idx)
1312 {
1313         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1314         struct mncc_q_entry *qe, *qe2;
1315         int rc;
1316
1317         while (1) {
1318                 qe = lcr_gsm->mncc_q_hd;
1319                 if (!qe) {
1320                         lfd->when &= ~LCR_FD_WRITE;
1321                         break;
1322                 }
1323                 rc = write(lfd->fd, qe->data, qe->len);
1324                 if (rc == 0)
1325                         return mncc_fd_close(lcr_gsm, lfd);
1326                 if (rc < 0)
1327                         return rc;
1328                 if (rc < (int)qe->len)
1329                         return -1;
1330                 /* dequeue the successfully sent message */
1331                 qe2 = mncc_q_dequeue(lcr_gsm);
1332                 assert(qe == qe2);
1333                 free(qe);
1334         }
1335         return 0;
1336 }
1337
1338 /* read from OpenBSC via MNCC socket */
1339 static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
1340 {
1341         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1342         int rc;
1343         static char buf[sizeof(struct gsm_mncc)+1024];
1344         struct gsm_mncc *mncc_prim = (struct gsm_mncc *) buf;
1345         struct gsm_mncc_hello *hello = (struct gsm_mncc_hello *) buf;
1346
1347         memset(buf, 0, sizeof(buf));
1348         rc = recv(lfd->fd, buf, sizeof(buf), 0);
1349         if (rc == 0)
1350                 return mncc_fd_close(lcr_gsm, lfd);
1351         if (rc < 0)
1352                 return rc;
1353
1354         /* TODO: size check? */
1355         switch (mncc_prim->msg_type) {
1356         case MNCC_SOCKET_HELLO:
1357                 if (hello->version != MNCC_SOCK_VERSION) {
1358                         PERROR("MNCC version different. BSC version is %u\n", hello->version);
1359                         mncc_fd_close(lcr_gsm, lfd);
1360                         return 0;
1361                 }
1362                 if (hello->mncc_size != sizeof(struct gsm_mncc)) {
1363                         PERROR("MNCC gsm_mncc size differs: %u %u\n",
1364                                 hello->mncc_size, sizeof(struct gsm_mncc));
1365                         mncc_fd_close(lcr_gsm, lfd);
1366                         return 0;
1367                 }
1368                 if (hello->data_frame_size != sizeof(struct gsm_data_frame)) {
1369                         PERROR("MNCC gsm_mncc size differs: %u %u\n",
1370                                 hello->data_frame_size, sizeof(struct gsm_data_frame));
1371                         mncc_fd_close(lcr_gsm, lfd);
1372                         return 0;
1373                 }
1374
1375 #define CHECK_OFFSET(hello, field, lcr_gsm, lfd)        \
1376                 if (hello->field ##_offset != __builtin_offsetof(struct gsm_mncc, field)) {     \
1377                         PERROR("MNCC gsm_mncc offset of %s is %u %u\n",                         \
1378                                 #field, hello->field ##_offset,                                 \
1379                                 __builtin_offsetof(struct gsm_mncc, field));                    \
1380                         mncc_fd_close(lcr_gsm, lfd);                                            \
1381                         return 0;                                                               \
1382                 }
1383
1384                 CHECK_OFFSET(hello, called, lcr_gsm, lfd);
1385                 CHECK_OFFSET(hello, signal, lcr_gsm, lfd);
1386                 CHECK_OFFSET(hello, emergency, lcr_gsm, lfd);
1387                 CHECK_OFFSET(hello, lchan_type, lcr_gsm, lfd);
1388 #undef CHECK_OFFSET
1389
1390                 break;
1391         }
1392
1393         /* Hand the MNCC message into LCR */
1394         switch (lcr_gsm->type) {
1395 #ifdef WITH_GSM_BS
1396         case LCR_GSM_TYPE_NETWORK:
1397                 return message_bsc(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1398 #endif
1399 #ifdef WITH_GSM_MS
1400         case LCR_GSM_TYPE_MS:
1401                 return message_ms(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1402 #endif
1403         default:
1404                 return 0;
1405         }
1406 }
1407
1408 /* file descriptor callback if we can read or write form MNCC socket */
1409 static int mncc_fd_cb(struct lcr_fd *lfd, unsigned int what, void *inst, int idx)
1410 {
1411         int rc = 0;
1412
1413         if (what & LCR_FD_READ)
1414                 rc = mncc_fd_read(lfd, inst, idx);
1415         if (rc < 0)
1416                 return rc;
1417
1418         if (what & LCR_FD_WRITE)
1419                 rc = mncc_fd_write(lfd, inst, idx);
1420
1421         return rc;
1422 }
1423
1424 int mncc_socket_retry_cb(struct lcr_timer *timer, void *inst, int index)
1425 {
1426         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1427         int fd, rc;
1428
1429         lcr_gsm->mncc_lfd.fd = -1;
1430
1431         fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
1432         if (fd < 0) {
1433                 PERROR("Cannot create SEQPACKET socket, giving up!\n");
1434                 return fd;
1435         }
1436
1437         rc = connect(fd, (struct sockaddr *) &lcr_gsm->sun,
1438                      sizeof(lcr_gsm->sun));
1439         if (rc < 0) {
1440                 PERROR("Could not connect to MNCC socket %s, "
1441                         "retrying in %u seconds\n", lcr_gsm->sun.sun_path,
1442                         SOCKET_RETRY_TIMER);
1443                 close(fd);
1444                 schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1445         } else {
1446                 PDEBUG(DEBUG_GSM, "Connected to MNCC socket %s!\n", lcr_gsm->sun.sun_path);
1447                 lcr_gsm->mncc_lfd.fd = fd;
1448                 register_fd(&lcr_gsm->mncc_lfd, LCR_FD_READ, &mncc_fd_cb, lcr_gsm, 0);
1449         }
1450
1451         return 0;
1452 }
1453