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         switch (frame->msg_type) {
 290         case GSM_TCHF_FRAME:
 291                 if (p_g_media_type != MEDIA_TYPE_GSM) {
 292                         PERROR("FR frame, but current media type mismatches.\n");
 293                         return;
 294                 }
 295                 if (!p_g_fr_decoder) {
 296                         PERROR("FR frame, but decoder not created.\n");
 297                         return;
 298                 }
 299                 if ((frame->data[0]>>4) != 0xd) {
 300                         PDEBUG(DEBUG_GSM, "received GSM frame with wrong magig 0x%x\n", frame->data[0]>>4);
 301                         goto bfi;
 302                 }
 303 #ifdef WITH_GSMFR
 304                 /* decode */
 305                 gsm_fr_decode(p_g_fr_decoder, frame->data, p_g_samples);
 306                 for (i = 0; i < 160; i++) {
 307                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 308                 }
 309 #endif
 310                 break;
 311         case GSM_TCHH_FRAME:
 312                 if (p_g_media_type != MEDIA_TYPE_GSM_HR) {
 313                         PERROR("HR frame, but current media type mismatches.\n");
 314                         return;
 315                 }
 316                 if (!p_g_hr_decoder) {
 317                         PERROR("HR frame, but decoder not created.\n");
 318                         return;
 319                 }
 320                 if ((frame->data[0]>>4) != 0x0)
 321                         goto bfi;
 322 #ifdef WITH_GSMHR
 323                 /* decode */
 324                 if (gsm_hr_decode(p_g_hr_decoder, frame->data, p_g_samples))
 325                         goto bfi;
 326                 for (i = 0; i < 160; i++) {
 327                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 328                 }
 329 #endif
 330                 break;
 331         case GSM_TCHF_FRAME_EFR:
 332                 if (p_g_media_type != MEDIA_TYPE_GSM_EFR) {
 333                         PERROR("EFR frame, but current media type mismatches.\n");
 334                         return;
 335                 }
 336                 if (!p_g_amr_decoder) {
 337                         PERROR("EFR frame, but decoder not created.\n");
 338                         return;
 339                 }
 340                 if ((frame->data[0]>>4) != 0xc)
 341                         goto bfi;
 342 #ifdef WITH_GSMAMR
 343                 /* decode */
 344                 gsm_efr_decode(p_g_amr_decoder, frame->data, p_g_samples);
 345                 for (i = 0; i < 160; i++) {
 346                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 347                 }
 348 #endif
 349                 break;
 350         case GSM_TCH_FRAME_AMR:
 351                 if (p_g_media_type != MEDIA_TYPE_AMR) {
 352                         PERROR("AMR frame, but current media type mismatches.\n");
 353                         return;
 354                 }
 355                 if (!p_g_amr_decoder) {
 356                         PERROR("AMR frame, but decoder not created.\n");
 357                         return;
 358                 }
 359                 cmr = (frame->data[1] >> 4);
 360                 if (cmr <= 7) {
 361                         p_g_amr_cmr = cmr;
 362                         p_g_amr_cmr_valid = 1;
 363                 }
 364                 if (!(frame->data[2] & 0x04))
 365                         goto bfi;
 366 #ifdef WITH_GSMAMR
 367                 /* decode (skip length byte in front) */
 368                 gsm_amr_decode(p_g_amr_decoder, frame->data + 1, p_g_samples);
 369                 for (i = 0; i < 160; i++) {
 370                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 371                 }
 372 #endif
 373                 break;
 374         case GSM_BAD_FRAME:
 375         default:
 376 bfi:
 377                 if (p_echotest) {
 378                         /* beep on bad frame */
 379                         for (i = 0; i < 160; i++) {
 380                                 if ((i & 3) > 2)
 381                                         p_g_samples[i] = 15000;
 382                                 else
 383                                         p_g_samples[i] = -15000;
 384                                 data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 385                         }
 386                 } else {
 387                         /* repeat on bad frame */
 388                         for (i = 0; i < 160; i++) {
 389                                 p_g_samples[i] = (p_g_samples[i] * 14) >> 4;
 390                                 data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 391                         }
 392                 }
 393         }
 394
 395         /* record data */
 396         if (p_record)
 397                 record(data, 160, 0); // from down
 398         if (p_tap)
 399                 tap(data, 160, 0); // from down
 400
 401         /* local echo */
 402         if (p_echotest)
 403                 bridge_rx(data, 160);
 404
 405         /* send to remote*/
 406         bridge_tx(data, 160);
 407 }
 408
 409 /* send traffic to gsm */
 410 int Pgsm::bridge_rx(unsigned char *data, int len)
 411 {
 412         int ret;
 413
 414         if ((ret = Port::bridge_rx(data, len)))
 415                 return ret;
 416
 417         if (p_tone_name[0])
 418                 return -EINVAL;
 419
 420         return audio_send(data, len);
 421 }
 422
 423 int Pgsm::audio_send(unsigned char *data, int len)
 424 {
 425         unsigned char frame[33];
 426         int ret;
 427
 428         /* record data */
 429         if (p_record)
 430                 record(data, len, 1); // from up
 431         if (p_tap)
 432                 tap(data, len, 1); // from up
 433
 434         /* (currently) not connected, so don't flood tch! */
 435         if (!p_g_tch_connected)
 436                 return -EINVAL;
 437
 438         /* write to rx buffer */
 439         while(len--) {
 440                 p_g_rxdata[p_g_rxpos++] = audio_law_to_s32[*data++];
 441                 if (p_g_rxpos != 160)
 442                         continue;
 443                 p_g_rxpos = 0;
 444
 445                 switch (p_g_media_type) {
 446                 case MEDIA_TYPE_GSM:
 447                         if (!p_g_fr_encoder) {
 448                                 PERROR("FR frame, but encoder not created.\n");
 449                                 break;
 450                         }
 451 #ifdef WITH_GSMFR
 452                         /* encode data */
 453                         gsm_fr_encode(p_g_fr_encoder, p_g_rxdata, frame);
 454                         frame_send(frame, 33, GSM_TCHF_FRAME);
 455 #endif
 456                         break;
 457                 case MEDIA_TYPE_GSM_HR:
 458                         if (!p_g_hr_encoder) {
 459                                 PERROR("HR frame, but encoder not created.\n");
 460                                 break;
 461                         }
 462 #ifdef WITH_GSMHR
 463                         /* encode data */
 464                         gsm_hr_encode(p_g_hr_encoder, p_g_rxdata, frame);
 465                         frame_send(frame, 15, GSM_TCHH_FRAME);
 466 #endif
 467                         break;
 468                 case MEDIA_TYPE_GSM_EFR:
 469                         if (!p_g_amr_encoder) {
 470                                 PERROR("EFR frame, but encoder not created.\n");
 471                                 break;
 472                         }
 473 #ifdef WITH_GSMAMR
 474                         /* encode data */
 475                         gsm_efr_encode(p_g_amr_encoder, p_g_rxdata, frame);
 476                         frame_send(frame, 31, GSM_TCHF_FRAME_EFR);
 477 #endif
 478                         break;
 479                 case MEDIA_TYPE_AMR:
 480                         if (!p_g_amr_encoder) {
 481                                 PERROR("AMR frame, but encoder not created.\n");
 482                                 break;
 483                         }
 484                         if (!p_g_amr_cmr_valid) {
 485                                 PDEBUG(DEBUG_GSM, "no valid CMR yet.\n");
 486                                 break;
 487                         }
 488 #ifdef WITH_GSMAMR
 489                         /* encode data (prefix a length byte) */
 490                         ret = gsm_amr_encode(p_g_amr_encoder, p_g_rxdata, frame + 1, p_g_amr_cmr);
 491                         frame[0] = ret;
 492                         frame_send(frame, ret + 1, GSM_TCH_FRAME_AMR);
 493 #endif
 494                         break;
 495                 }
 496         }
 497
 498         return 0;
 499 }
 500
 501 void Pgsm::frame_send(void *_frame, int len, int msg_type)
 502 {
 503         unsigned char buffer[sizeof(struct gsm_data_frame) + len];
 504         struct gsm_data_frame *frame = (struct gsm_data_frame *)buffer;
 505
 506         frame->msg_type = msg_type;
 507         frame->callref = p_g_callref;
 508         memcpy(frame->data, _frame, len);
 509
 510         if (p_g_lcr_gsm) {
 511                 mncc_send(p_g_lcr_gsm, frame->msg_type, frame);
 512         }
 513 }
 514
 515 /*
 516  * create trace
 517  */
 518 void gsm_trace_header(const char *interface_name, class Pgsm *port, unsigned int msg_type, int direction)
 519 {
 520         char msgtext[64];
 521         struct interface *interface = interface_first;
 522
 523         interface = getinterfacebyname(interface_name);
 524         if (!interface)
 525                 return;
 526
 527         /* select message and primitive text */
 528         SCPY(msgtext, mncc_name(msg_type));
 529
 530         /* add direction */
 531         if (port) {
 532                 switch(port->p_type) {
 533                 case PORT_TYPE_GSM_BS_OUT:
 534                 case PORT_TYPE_GSM_BS_IN:
 535                         SCAT(msgtext, " LCR<->BSC");
 536                         break;
 537                 case PORT_TYPE_GSM_MS_OUT:
 538                 case PORT_TYPE_GSM_MS_IN:
 539                         SCAT(msgtext, " LCR<->MS");
 540                         break;
 541                 }
 542         } else
 543                 SCAT(msgtext, " ----");
 544
 545         /* init trace with given values */
 546         start_trace(-1,
 547                     interface,
 548                     port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
 549                     port?port->p_dialinginfo.id:NULL,
 550                     direction,
 551                     CATEGORY_CH,
 552                     port?port->p_serial:0,
 553                     msgtext);
 554 }
 555
 556 /* modify lchan to given payload type */
 557 void Pgsm::modify_lchan(int media_type)
 558 {
 559         struct gsm_mncc *mode;
 560
 561         /* already modified to that media type */
 562         if (p_g_media_type == media_type)
 563                 return;
 564
 565         p_g_media_type = media_type;
 566         gsm_trace_header(p_interface_name, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
 567         mode = create_mncc(MNCC_LCHAN_MODIFY, p_g_callref);
 568         switch (media_type) {
 569         case MEDIA_TYPE_GSM_EFR:
 570                 add_trace("speech", "version", "EFR given");
 571                 mode->lchan_mode = 0x21; /* GSM V2 */
 572                 mode->lchan_type = 0x02; /* TCH/F */
 573                 break;
 574         case MEDIA_TYPE_AMR:
 575                 add_trace("speech", "version", "AMR given");
 576                 mode->lchan_mode = 0x41; /* GSM V3 */
 577                 /* as we don't know the available channels, this type will be set by openbsc automatically */
 578                 mode->lchan_type = 0x02; /* TCH/F */
 579                 break;
 580         case MEDIA_TYPE_GSM_HR:
 581                 add_trace("speech", "version", "Half Rate given");
 582                 mode->lchan_mode = 0x01; /* GSM V1 */
 583                 mode->lchan_type = 0x03; /* TCH/H */
 584         default:
 585                 add_trace("speech", "version", "Full Rate given");
 586                 mode->lchan_mode = 0x01; /* GSM V1 */
 587                 mode->lchan_type = 0x02; /* TCH/F */
 588         }
 589         add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
 590         end_trace();
 591         send_and_free_mncc(p_g_lcr_gsm, mode->msg_type, mode);
 592 }
 593
 594 /* CALL PROCEEDING INDICATION (from network) */
 595 void Pgsm::call_proc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 596 {
 597         struct lcr_msg *message;
 598         struct gsm_mncc *frame;
 599
 600         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 601         end_trace();
 602
 603         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
 604         message_put(message);
 605
 606         new_state(PORT_STATE_OUT_PROCEEDING);
 607
 608         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 609                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 610                 end_trace();
 611                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 612                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 613                 p_g_tch_connected = 1;
 614         }
 615
 616         /* modify to GSM FR (this is GSM user side only, so there is FR supported only) */
 617         modify_lchan(MEDIA_TYPE_GSM);
 618 }
 619
 620 /* ALERTING INDICATION */
 621 void Pgsm::alert_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 622 {
 623         struct lcr_msg *message;
 624         struct gsm_mncc *frame;
 625
 626         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 627         end_trace();
 628
 629         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_ALERTING);
 630         message_put(message);
 631
 632         new_state(PORT_STATE_OUT_ALERTING);
 633
 634         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 635                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 636                 end_trace();
 637                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 638                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 639                 p_g_tch_connected = 1;
 640         }
 641
 642         /* modify to GSM FR, if not already */
 643         if (!p_g_media_type) {
 644                 modify_lchan(MEDIA_TYPE_GSM);
 645         }
 646 }
 647
 648 /* CONNECT INDICATION */
 649 void Pgsm::setup_cnf(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 650 {
 651         struct gsm_mncc *resp, *frame;
 652         struct lcr_msg *message;
 653
 654         SCPY(p_connectinfo.id, mncc->connected.number);
 655         SCPY(p_connectinfo.imsi, mncc->imsi);
 656         p_connectinfo.present = INFO_PRESENT_ALLOWED;
 657         p_connectinfo.screen = INFO_SCREEN_NETWORK;
 658         p_connectinfo.ntype = INFO_NTYPE_UNKNOWN;
 659         SCPY(p_connectinfo.interface, p_interface_name);
 660
 661         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 662         if (p_connectinfo.id[0])
 663                 add_trace("connect", "number", "%s", p_connectinfo.id);
 664         else if (mncc->imsi[0])
 665                 SPRINT(p_connectinfo.id, "imsi-%s", p_connectinfo.imsi);
 666         if (mncc->imsi[0])
 667                 add_trace("connect", "imsi", "%s", p_connectinfo.imsi);
 668         end_trace();
 669
 670         /* send resp */
 671         gsm_trace_header(p_interface_name, this, MNCC_SETUP_COMPL_REQ, DIRECTION_OUT);
 672         resp = create_mncc(MNCC_SETUP_COMPL_REQ, p_g_callref);
 673         end_trace();
 674         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 675
 676         new_state(PORT_STATE_CONNECT);
 677
 678         if (!p_g_tch_connected) { /* only if ... */
 679                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 680                 end_trace();
 681                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 682                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 683                 p_g_tch_connected = 1;
 684         }
 685
 686         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
 687         memcpy(&message->param.connectinfo, &p_connectinfo, sizeof(struct connect_info));
 688
 689         /* if we have a bridge, but not yet modified, the phone accepts out requested payload.
 690          * we force the first in list */
 691         if (p_g_rtp_bridge) {
 692                 if (!p_g_media_type) {
 693                         /* modify to first given type */
 694                         modify_lchan(p_g_rtp_media_types[0]);
 695                         /* also set payload type */
 696                         p_g_payload_type = p_g_rtp_payload_types[0];
 697                 }
 698                 message->param.connectinfo.rtpinfo.media_types[0] = p_g_media_type;
 699                 message->param.connectinfo.rtpinfo.payload_types[0] = p_g_payload_type;
 700                 message->param.connectinfo.rtpinfo.payloads = 1;
 701         } else {
 702                 /* modify to GSM FR, if not already
 703                 * for network side, this should have been already happened */
 704                 if (!p_g_media_type)
 705                         modify_lchan(MEDIA_TYPE_GSM);
 706         }
 707
 708
 709         if (p_g_rtp_bridge) {
 710                 struct gsm_mncc_rtp *rtp;
 711
 712                 PDEBUG(DEBUG_GSM, "Request RTP peer info, before forwarding connect msg\n");
 713                 p_g_connect_pending = message;
 714                 rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CREATE, p_g_callref);
 715                 send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
 716         } else
 717                 message_put(message);
 718 }
 719
 720 /* CONNECT ACK INDICATION */
 721 void Pgsm::setup_compl_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 722 {
 723         struct gsm_mncc *frame;
 724
 725         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 726         end_trace();
 727
 728         new_state(PORT_STATE_CONNECT);
 729
 730         if (!p_g_tch_connected) { /* only if ... */
 731                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 732                 end_trace();
 733                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 734                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 735                 p_g_tch_connected = 1;
 736         }
 737
 738         /* modify to GSM FR, if not already */
 739         if (!p_g_media_type) {
 740                 modify_lchan(MEDIA_TYPE_GSM);
 741         }
 742 }
 743
 744 /* DISCONNECT INDICATION */
 745 void Pgsm::disc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 746 {
 747         struct lcr_msg *message;
 748         int cause = 16, location = 0;
 749         struct gsm_mncc *resp;
 750
 751         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 752         if (mncc->fields & MNCC_F_CAUSE) {
 753                 location = mncc->cause.location;
 754                 cause = mncc->cause.value;
 755                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 756                 add_trace("cause", "location", "%d", location);
 757                 add_trace("cause", "value", "%d", cause);
 758         }
 759         end_trace();
 760
 761         /* send release */
 762         resp = create_mncc(MNCC_REL_REQ, p_g_callref);
 763         gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
 764 #if 0
 765         resp->fields |= MNCC_F_CAUSE;
 766         resp->cause.coding = 3;
 767         resp->cause.location = 1;
 768         resp->cause.value = cause;
 769         add_trace("cause", "coding", "%d", resp->cause.coding);
 770         add_trace("cause", "location", "%d", resp->cause.location);
 771         add_trace("cause", "value", "%d", resp->cause.value);
 772 #endif
 773         end_trace();
 774         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 775
 776         /* sending release to endpoint */
 777         while(p_epointlist) {
 778                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 779                 message->param.disconnectinfo.cause = cause;
 780                 message->param.disconnectinfo.location = location;
 781                 message_put(message);
 782                 /* remove epoint */
 783                 free_epointlist(p_epointlist);
 784         }
 785         new_state(PORT_STATE_RELEASE);
 786         trigger_work(&p_g_delete);
 787 }
 788
 789 /* CC_RELEASE INDICATION */
 790 void Pgsm::rel_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 791 {
 792         int location = 0, cause = 16;
 793         struct lcr_msg *message;
 794
 795         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 796         if (mncc->fields & MNCC_F_CAUSE) {
 797                 location = mncc->cause.location;
 798                 cause = mncc->cause.value;
 799                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 800                 add_trace("cause", "location", "%d", mncc->cause.location);
 801                 add_trace("cause", "value", "%d", mncc->cause.value);
 802         }
 803         end_trace();
 804
 805         /* sending release to endpoint */
 806         while(p_epointlist) {
 807                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 808                 message->param.disconnectinfo.cause = cause;
 809                 message->param.disconnectinfo.location = location;
 810                 message_put(message);
 811                 /* remove epoint */
 812                 free_epointlist(p_epointlist);
 813         }
 814         new_state(PORT_STATE_RELEASE);
 815         trigger_work(&p_g_delete);
 816 }
 817
 818 /* NOTIFY INDICATION */
 819 void Pgsm::notify_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 820 {
 821         struct lcr_msg *message;
 822
 823         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 824         add_trace("notify", NULL, "%d", mncc->notify);
 825         end_trace();
 826
 827         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 828         message->param.notifyinfo.notify = mncc->notify;
 829         message_put(message);
 830 }
 831
 832 /* MESSAGE_NOTIFY */
 833 void Pgsm::message_notify(unsigned int epoint_id, int message_id, union parameter *param)
 834 {
 835         struct gsm_mncc *mncc;
 836         int notify;
 837
 838 //      printf("if = %d\n", param->notifyinfo.notify);
 839         if (param->notifyinfo.notify>INFO_NOTIFY_NONE) {
 840                 notify = param->notifyinfo.notify & 0x7f;
 841                 /* skip all notifiy ids that are not 0, 1, 2 */
 842                 if (notify > 2)
 843                         return;
 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 #ifdef WITH_GSM_MS
1064         /* special case for BS mode */
1065         if (param->disconnectinfo.transfer.result && (p_type & PORT_CLASS_GSM_MASK) == PORT_CLASS_GSM_BS) {
1066                 ((class Pgsm_bs *)this)->enc_ie_facility_ect(mncc, &param->disconnectinfo.transfer);
1067                 gsm_trace_facility((unsigned char *)mncc->facility.info, mncc->facility.len);
1068         }
1069 #endif
1070         end_trace();
1071         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1072
1073         new_state(PORT_STATE_OUT_DISCONNECT);
1074
1075         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
1076                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
1077                 end_trace();
1078                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
1079                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1080                 p_g_tch_connected = 1;
1081         }
1082 }
1083
1084
1085 /* MESSAGE_RELEASE */
1086 void Pgsm::message_release(unsigned int epoint_id, int message_id, union parameter *param)
1087 {
1088         struct gsm_mncc *mncc;
1089
1090         /* send release */
1091         mncc = create_mncc(MNCC_REL_REQ, p_g_callref);
1092         gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
1093         mncc->fields |= MNCC_F_CAUSE;
1094         mncc->cause.coding = 3;
1095         mncc->cause.location = param->disconnectinfo.location;
1096         mncc->cause.value = param->disconnectinfo.cause;
1097         add_trace("cause", "coding", "%d", mncc->cause.coding);
1098         add_trace("cause", "location", "%d", mncc->cause.location);
1099         add_trace("cause", "value", "%d", mncc->cause.value);
1100         end_trace();
1101         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1102
1103         new_state(PORT_STATE_RELEASE);
1104         trigger_work(&p_g_delete);
1105         return;
1106 }
1107
1108 /*
1109  * endpoint sends messages to the port
1110  */
1111 int Pgsm::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
1112 {
1113         int ret = 0;
1114
1115         if (Port::message_epoint(epoint_id, message_id, param))
1116                 return 1;
1117
1118         switch(message_id) {
1119                 case MESSAGE_NOTIFY: /* display and notifications */
1120                 ret = 1;
1121                 message_notify(epoint_id, message_id, param);
1122                 break;
1123
1124 //              case MESSAGE_FACILITY: /* facility message */
1125 //              message_facility(epoint_id, message_id, param);
1126 //              break;
1127
1128                 case MESSAGE_PROCEEDING: /* message not handles */
1129                 ret = 1;
1130                 break;
1131
1132                 case MESSAGE_PROGRESS:
1133                 ret = 1;
1134                 message_progress(epoint_id, message_id, param);
1135                 break;
1136
1137                 case MESSAGE_ALERTING: /* call of endpoint is ringing */
1138                 ret = 1;
1139                 if (p_state!=PORT_STATE_IN_PROCEEDING)
1140                         break;
1141                 message_alerting(epoint_id, message_id, param);
1142                 if (p_g_notify_pending) {
1143                         /* send pending notify message during connect */
1144                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
1145                         message_free(p_g_notify_pending);
1146                         p_g_notify_pending = NULL;
1147                 }
1148                 break;
1149
1150                 case MESSAGE_CONNECT: /* call of endpoint is connected */
1151                 ret = 1;
1152                 if (p_state!=PORT_STATE_IN_PROCEEDING
1153                  && p_state!=PORT_STATE_IN_ALERTING)
1154                         break;
1155                 message_connect(epoint_id, message_id, param);
1156                 if (p_g_notify_pending) {
1157                         /* send pending notify message during connect */
1158                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
1159                         message_free(p_g_notify_pending);
1160                         p_g_notify_pending = NULL;
1161                 }
1162                 break;
1163
1164                 case MESSAGE_DISCONNECT: /* call has been disconnected */
1165                 ret = 1;
1166                 if (p_state!=PORT_STATE_IN_PROCEEDING
1167                  && p_state!=PORT_STATE_IN_ALERTING
1168                  && p_state!=PORT_STATE_OUT_SETUP
1169                  && p_state!=PORT_STATE_OUT_OVERLAP
1170                  && p_state!=PORT_STATE_OUT_PROCEEDING
1171                  && p_state!=PORT_STATE_OUT_ALERTING
1172                  && p_state!=PORT_STATE_CONNECT
1173                  && p_state!=PORT_STATE_CONNECT_WAITING)
1174                         break;
1175                 message_disconnect(epoint_id, message_id, param);
1176                 break;
1177
1178                 case MESSAGE_RELEASE: /* release isdn port */
1179                 ret = 1;
1180                 if (p_state==PORT_STATE_RELEASE)
1181                         break;
1182                 message_release(epoint_id, message_id, param);
1183                 break;
1184
1185         }
1186
1187         return ret;
1188 }
1189
1190 /* deletes only if l3id is release, otherwhise it will be triggered then */
1191 static int delete_event(struct lcr_work *work, void *instance, int index)
1192 {
1193         class Pgsm *gsmport = (class Pgsm *)instance;
1194
1195         delete gsmport;
1196
1197         return 0;
1198 }
1199
1200 int gsm_exit(int rc)
1201 {
1202         return(rc);
1203 }
1204
1205 int gsm_init(void)
1206 {
1207         /* seed the PRNG */
1208         srand(time(NULL));
1209
1210         return 0;
1211 }
1212
1213 /*
1214  * MNCC interface
1215  */
1216
1217 static int mncc_q_enqueue(struct lcr_gsm *lcr_gsm, struct gsm_mncc *mncc, unsigned int len)
1218 {
1219         struct mncc_q_entry *qe;
1220
1221         qe = (struct mncc_q_entry *) MALLOC(sizeof(*qe)+sizeof(*mncc)+len);
1222         if (!qe)
1223                 return -ENOMEM;
1224
1225         qe->next = NULL;
1226         qe->len = len;
1227         memcpy(qe->data, mncc, len);
1228
1229         /* in case of empty list ... */
1230         if (!lcr_gsm->mncc_q_hd && !lcr_gsm->mncc_q_tail) {
1231                 /* the list head and tail both point to the new qe */
1232                 lcr_gsm->mncc_q_hd = lcr_gsm->mncc_q_tail = qe;
1233         } else {
1234                 /* append to tail of list */
1235                 lcr_gsm->mncc_q_tail->next = qe;
1236                 lcr_gsm->mncc_q_tail = qe;
1237         }
1238
1239         lcr_gsm->mncc_lfd.when |= LCR_FD_WRITE;
1240
1241         return 0;
1242 }
1243
1244 static struct mncc_q_entry *mncc_q_dequeue(struct lcr_gsm *lcr_gsm)
1245 {
1246         struct mncc_q_entry *qe = lcr_gsm->mncc_q_hd;
1247         if (!qe)
1248                 return NULL;
1249
1250         /* dequeue the successfully sent message */
1251         lcr_gsm->mncc_q_hd = qe->next;
1252         if (!qe)
1253                 return NULL;
1254         if (qe == lcr_gsm->mncc_q_tail)
1255                 lcr_gsm->mncc_q_tail = NULL;
1256
1257         return qe;
1258 }
1259
1260 /* routine called by LCR code if it wants to send a message to OpenBSC */
1261 static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data)
1262 {
1263         int len = 0;
1264
1265         /* FIXME: the caller should provide this */
1266         switch (msg_type) {
1267         case GSM_TCHF_FRAME:
1268                 len = sizeof(struct gsm_data_frame) + 33;
1269                 break;
1270         default:
1271                 len = sizeof(struct gsm_mncc);
1272                 break;
1273         }
1274
1275         return mncc_q_enqueue(lcr_gsm, (struct gsm_mncc *)data, len);
1276 }
1277
1278 /* close MNCC socket */
1279 static int mncc_fd_close(struct lcr_gsm *lcr_gsm, struct lcr_fd *lfd)
1280 {
1281         class Port *port;
1282         class Pgsm *pgsm = NULL;
1283         struct lcr_msg *message;
1284
1285         PERROR("Lost MNCC socket, retrying in %u seconds\n", SOCKET_RETRY_TIMER);
1286         close(lfd->fd);
1287         unregister_fd(lfd);
1288         lfd->fd = -1;
1289
1290         /* free all the calls that were running through the MNCC interface */
1291         port = port_first;
1292         while(port) {
1293                 if ((port->p_type & PORT_CLASS_MASK) == PORT_CLASS_GSM) {
1294                         pgsm = (class Pgsm *)port;
1295                         if (pgsm->p_g_lcr_gsm == lcr_gsm) {
1296                                 message = message_create(pgsm->p_serial, ACTIVE_EPOINT(pgsm->p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
1297                                 message->param.disconnectinfo.cause = 27; // temp. unavail.
1298                                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
1299                                 message_put(message);
1300                                 pgsm->new_state(PORT_STATE_RELEASE);
1301                                 trigger_work(&pgsm->p_g_delete);
1302                         }
1303                 }
1304                 port = port->next;
1305         }
1306
1307         /* flush the queue */
1308         while (mncc_q_dequeue(lcr_gsm))
1309                 ;
1310
1311         /* start the re-connect timer */
1312         schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1313
1314         return 0;
1315 }
1316
1317 /* write to OpenBSC via MNCC socket */
1318 static int mncc_fd_write(struct lcr_fd *lfd, void *inst, int idx)
1319 {
1320         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1321         struct mncc_q_entry *qe, *qe2;
1322         int rc;
1323
1324         while (1) {
1325                 qe = lcr_gsm->mncc_q_hd;
1326                 if (!qe) {
1327                         lfd->when &= ~LCR_FD_WRITE;
1328                         break;
1329                 }
1330                 rc = write(lfd->fd, qe->data, qe->len);
1331                 if (rc == 0)
1332                         return mncc_fd_close(lcr_gsm, lfd);
1333                 if (rc < 0)
1334                         return rc;
1335                 if (rc < (int)qe->len)
1336                         return -1;
1337                 /* dequeue the successfully sent message */
1338                 qe2 = mncc_q_dequeue(lcr_gsm);
1339                 assert(qe == qe2);
1340                 free(qe);
1341         }
1342         return 0;
1343 }
1344
1345 /* read from OpenBSC via MNCC socket */
1346 static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
1347 {
1348         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1349         int rc;
1350         static char buf[sizeof(struct gsm_mncc)+1024];
1351         struct gsm_mncc *mncc_prim = (struct gsm_mncc *) buf;
1352         struct gsm_mncc_hello *hello = (struct gsm_mncc_hello *) buf;
1353
1354         memset(buf, 0, sizeof(buf));
1355         rc = recv(lfd->fd, buf, sizeof(buf), 0);
1356         if (rc == 0)
1357                 return mncc_fd_close(lcr_gsm, lfd);
1358         if (rc < 0)
1359                 return rc;
1360
1361         /* TODO: size check? */
1362         switch (mncc_prim->msg_type) {
1363         case MNCC_SOCKET_HELLO:
1364                 if (hello->version != MNCC_SOCK_VERSION) {
1365                         PERROR("MNCC version different. BSC version is %u\n", hello->version);
1366                         mncc_fd_close(lcr_gsm, lfd);
1367                         return 0;
1368                 }
1369                 if (hello->mncc_size != sizeof(struct gsm_mncc)) {
1370                         PERROR("MNCC gsm_mncc size differs: %u %u\n",
1371                                 hello->mncc_size, sizeof(struct gsm_mncc));
1372                         mncc_fd_close(lcr_gsm, lfd);
1373                         return 0;
1374                 }
1375                 if (hello->data_frame_size != sizeof(struct gsm_data_frame)) {
1376                         PERROR("MNCC gsm_mncc size differs: %u %u\n",
1377                                 hello->data_frame_size, sizeof(struct gsm_data_frame));
1378                         mncc_fd_close(lcr_gsm, lfd);
1379                         return 0;
1380                 }
1381
1382 #define CHECK_OFFSET(hello, field, lcr_gsm, lfd)        \
1383                 if (hello->field ##_offset != __builtin_offsetof(struct gsm_mncc, field)) {     \
1384                         PERROR("MNCC gsm_mncc offset of %s is %u %u\n",                         \
1385                                 #field, hello->field ##_offset,                                 \
1386                                 __builtin_offsetof(struct gsm_mncc, field));                    \
1387                         mncc_fd_close(lcr_gsm, lfd);                                            \
1388                         return 0;                                                               \
1389                 }
1390
1391                 CHECK_OFFSET(hello, called, lcr_gsm, lfd);
1392                 CHECK_OFFSET(hello, signal, lcr_gsm, lfd);
1393                 CHECK_OFFSET(hello, emergency, lcr_gsm, lfd);
1394                 CHECK_OFFSET(hello, lchan_type, lcr_gsm, lfd);
1395 #undef CHECK_OFFSET
1396
1397                 break;
1398         }
1399
1400         /* Hand the MNCC message into LCR */
1401         switch (lcr_gsm->type) {
1402 #ifdef WITH_GSM_BS
1403         case LCR_GSM_TYPE_NETWORK:
1404                 return message_bsc(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1405 #endif
1406 #ifdef WITH_GSM_MS
1407         case LCR_GSM_TYPE_MS:
1408                 return message_ms(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1409 #endif
1410         default:
1411                 return 0;
1412         }
1413 }
1414
1415 /* file descriptor callback if we can read or write form MNCC socket */
1416 static int mncc_fd_cb(struct lcr_fd *lfd, unsigned int what, void *inst, int idx)
1417 {
1418         int rc = 0;
1419
1420         if (what & LCR_FD_READ)
1421                 rc = mncc_fd_read(lfd, inst, idx);
1422         if (rc < 0)
1423                 return rc;
1424
1425         if (what & LCR_FD_WRITE)
1426                 rc = mncc_fd_write(lfd, inst, idx);
1427
1428         return rc;
1429 }
1430
1431 int mncc_socket_retry_cb(struct lcr_timer *timer, void *inst, int index)
1432 {
1433         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1434         int fd, rc;
1435
1436         lcr_gsm->mncc_lfd.fd = -1;
1437
1438         fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
1439         if (fd < 0) {
1440                 PERROR("Cannot create SEQPACKET socket, giving up!\n");
1441                 return fd;
1442         }
1443
1444         rc = connect(fd, (struct sockaddr *) &lcr_gsm->sun,
1445                      sizeof(lcr_gsm->sun));
1446         if (rc < 0) {
1447                 PERROR("Could not connect to MNCC socket %s, "
1448                         "retrying in %u seconds\n", lcr_gsm->sun.sun_path,
1449                         SOCKET_RETRY_TIMER);
1450                 close(fd);
1451                 schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1452         } else {
1453                 PDEBUG(DEBUG_GSM, "Connected to MNCC socket %s!\n", lcr_gsm->sun.sun_path);
1454                 lcr_gsm->mncc_lfd.fd = fd;
1455                 register_fd(&lcr_gsm->mncc_lfd, LCR_FD_READ, &mncc_fd_cb, lcr_gsm, 0);
1456         }
1457
1458         return 0;
1459 }
1460