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         /* encoder init failed */
 438         if (!p_g_fr_encoder)
 439                 return -EINVAL;
 440
 441         /* (currently) not connected, so don't flood tch! */
 442         if (!p_g_tch_connected)
 443                 return -EINVAL;
 444
 445         /* write to rx buffer */
 446         while(len--) {
 447                 p_g_rxdata[p_g_rxpos++] = audio_law_to_s32[*data++];
 448                 if (p_g_rxpos != 160)
 449                         continue;
 450                 p_g_rxpos = 0;
 451
 452                 switch (p_g_media_type) {
 453                 case MEDIA_TYPE_GSM:
 454                         if (!p_g_fr_encoder) {
 455                                 PERROR("FR frame, but encoder not created.\n");
 456                                 break;
 457                         }
 458 #ifdef WITH_GSMFR
 459                         /* encode data */
 460                         gsm_fr_encode(p_g_fr_encoder, p_g_rxdata, frame);
 461                         frame_send(frame, 33, GSM_TCHF_FRAME);
 462 #endif
 463                         break;
 464                 case MEDIA_TYPE_GSM_HR:
 465                         if (!p_g_hr_encoder) {
 466                                 PERROR("HR frame, but encoder not created.\n");
 467                                 break;
 468                         }
 469 #ifdef WITH_GSMHR
 470                         /* encode data */
 471                         gsm_hr_encode(p_g_hr_encoder, p_g_rxdata, frame);
 472                         frame_send(frame, 15, GSM_TCHH_FRAME);
 473 #endif
 474                         break;
 475                 case MEDIA_TYPE_GSM_EFR:
 476                         if (!p_g_amr_encoder) {
 477                                 PERROR("EFR frame, but encoder not created.\n");
 478                                 break;
 479                         }
 480 #ifdef WITH_GSMAMR
 481                         /* encode data */
 482                         gsm_efr_encode(p_g_amr_encoder, p_g_rxdata, frame);
 483                         frame_send(frame, 31, GSM_TCHF_FRAME_EFR);
 484 #endif
 485                         break;
 486                 case MEDIA_TYPE_AMR:
 487                         if (!p_g_amr_encoder) {
 488                                 PERROR("AMR frame, but encoder not created.\n");
 489                                 break;
 490                         }
 491                         if (!p_g_amr_cmr_valid) {
 492                                 PDEBUG(DEBUG_GSM, "no valid CMR yet.\n");
 493                                 break;
 494                         }
 495 #ifdef WITH_GSMAMR
 496                         /* encode data (prefix a length byte) */
 497                         ret = gsm_amr_encode(p_g_amr_encoder, p_g_rxdata, frame + 1, p_g_amr_cmr);
 498                         frame[0] = ret;
 499                         frame_send(frame, ret + 1, GSM_TCH_FRAME_AMR);
 500 #endif
 501                         break;
 502                 }
 503         }
 504
 505         return 0;
 506 }
 507
 508 void Pgsm::frame_send(void *_frame, int len, int msg_type)
 509 {
 510         unsigned char buffer[sizeof(struct gsm_data_frame) + len];
 511         struct gsm_data_frame *frame = (struct gsm_data_frame *)buffer;
 512
 513         frame->msg_type = msg_type;
 514         frame->callref = p_g_callref;
 515         memcpy(frame->data, _frame, len);
 516
 517         if (p_g_lcr_gsm) {
 518                 mncc_send(p_g_lcr_gsm, frame->msg_type, frame);
 519         }
 520 }
 521
 522 /*
 523  * create trace
 524  */
 525 void gsm_trace_header(const char *interface_name, class Pgsm *port, unsigned int msg_type, int direction)
 526 {
 527         char msgtext[64];
 528         struct interface *interface = interface_first;
 529
 530         interface = getinterfacebyname(interface_name);
 531         if (!interface)
 532                 return;
 533
 534         /* select message and primitive text */
 535         SCPY(msgtext, mncc_name(msg_type));
 536
 537         /* add direction */
 538         if (port) {
 539                 switch(port->p_type) {
 540                 case PORT_TYPE_GSM_BS_OUT:
 541                 case PORT_TYPE_GSM_BS_IN:
 542                         SCAT(msgtext, " LCR<->BSC");
 543                         break;
 544                 case PORT_TYPE_GSM_MS_OUT:
 545                 case PORT_TYPE_GSM_MS_IN:
 546                         SCAT(msgtext, " LCR<->MS");
 547                         break;
 548                 }
 549         } else
 550                 SCAT(msgtext, " ----");
 551
 552         /* init trace with given values */
 553         start_trace(-1,
 554                     interface,
 555                     port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
 556                     port?port->p_dialinginfo.id:NULL,
 557                     direction,
 558                     CATEGORY_CH,
 559                     port?port->p_serial:0,
 560                     msgtext);
 561 }
 562
 563 /* modify lchan to given payload type */
 564 void Pgsm::modify_lchan(int media_type)
 565 {
 566         struct gsm_mncc *mode;
 567
 568         /* already modified to that media type */
 569         if (p_g_media_type == media_type)
 570                 return;
 571
 572         p_g_media_type = media_type;
 573         gsm_trace_header(p_interface_name, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
 574         mode = create_mncc(MNCC_LCHAN_MODIFY, p_g_callref);
 575         switch (media_type) {
 576         case MEDIA_TYPE_GSM_EFR:
 577                 add_trace("speech", "version", "EFR given");
 578                 mode->lchan_mode = 0x21; /* GSM V2 */
 579                 break;
 580         case MEDIA_TYPE_AMR:
 581                 add_trace("speech", "version", "AMR given");
 582                 mode->lchan_mode = 0x41; /* GSM V3 */
 583                 break;
 584         default:
 585                 add_trace("speech", "version", "Full/Half Rate given");
 586                 mode->lchan_mode = 0x01; /* GSM V1 */
 587         }
 588         mode->lchan_type = 0x02; /* FIXME: unused */
 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                 if (p_state!=PORT_STATE_CONNECT /*&& p_state!=PORT_STATE_IN_PROCEEDING*/ && p_state!=PORT_STATE_IN_ALERTING) {
 842                         /* queue notification */
 843                         if (p_g_notify_pending)
 844                                 message_free(p_g_notify_pending);
 845                         p_g_notify_pending = message_create(ACTIVE_EPOINT(p_epointlist), p_serial, EPOINT_TO_PORT, message_id);
 846                         memcpy(&p_g_notify_pending->param, param, sizeof(union parameter));
 847                 } else {
 848                         /* sending notification */
 849                         gsm_trace_header(p_interface_name, this, MNCC_NOTIFY_REQ, DIRECTION_OUT);
 850                         add_trace("notify", NULL, "%d", notify);
 851                         end_trace();
 852                         mncc = create_mncc(MNCC_NOTIFY_REQ, p_g_callref);
 853                         mncc->notify = notify;
 854                         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 855                 }
 856         }
 857 }
 858
 859 /* RTP create indication */
 860 void Pgsm::rtp_create_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 861 {
 862         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 863
 864         /* send queued setup, as we received remote RTP info */
 865         if (p_g_setup_pending) {
 866                 struct lcr_msg *message;
 867
 868                 message = p_g_setup_pending;
 869                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding setup\n", rtp->ip, rtp->port);
 870                 message->param.setup.rtpinfo.ip = rtp->ip;
 871                 message->param.setup.rtpinfo.port = rtp->port;
 872                 message_put(message);
 873                 p_g_setup_pending = NULL;
 874         }
 875         if (p_g_connect_pending) {
 876                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) connecting RTP... \n", rtp->ip, rtp->port);
 877                 send_mncc_rtp_connect();
 878         }
 879 }
 880
 881 /* RTP connect indication */
 882 void Pgsm::rtp_connect_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 883 {
 884         struct lcr_msg *message;
 885         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 886
 887         if (p_g_connect_pending) {
 888                 message = p_g_connect_pending;
 889                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding connect\n", rtp->ip, rtp->port);
 890                 message->param.connectinfo.rtpinfo.ip = rtp->ip;
 891                 message->param.connectinfo.rtpinfo.port = rtp->port;
 892                 message_put(message);
 893                 p_g_connect_pending = NULL;
 894         }
 895 }
 896
 897 /* MESSAGE_PROGRESS */
 898 void Pgsm::message_progress(unsigned int epoint_id, int message_id, union parameter *param)
 899 {
 900         if (param->progressinfo.progress == 8) {
 901                 PDEBUG(DEBUG_GSM, "Remote provides tones for us\n");
 902                 p_g_tones = 1;
 903         }
 904
 905         if (param->progressinfo.rtpinfo.port) {
 906                 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]);
 907
 908                 /* modify channel to givne type, also sets media type */
 909                 modify_lchan(param->progressinfo.rtpinfo.media_types[0]);
 910
 911                 /* connect RTP */
 912                 p_g_rtp_ip_remote = param->progressinfo.rtpinfo.ip;
 913                 p_g_rtp_port_remote = param->progressinfo.rtpinfo.port;
 914                 /* p_g_media_type is already set by modify_lchan() */
 915                 p_g_payload_type = param->progressinfo.rtpinfo.payload_types[0];
 916                 send_mncc_rtp_connect();
 917         }
 918 }
 919
 920 /* MESSAGE_ALERTING */
 921 void Pgsm::message_alerting(unsigned int epoint_id, int message_id, union parameter *param)
 922 {
 923         struct gsm_mncc *mncc;
 924
 925         /* send alert */
 926         gsm_trace_header(p_interface_name, this, MNCC_ALERT_REQ, DIRECTION_OUT);
 927         mncc = create_mncc(MNCC_ALERT_REQ, p_g_callref);
 928         if (p_g_tones) {
 929                 mncc->fields |= MNCC_F_PROGRESS;
 930                 mncc->progress.coding = 3; /* GSM */
 931                 mncc->progress.location = 1;
 932                 mncc->progress.descr = 8;
 933                 add_trace("progress", "coding", "%d", mncc->progress.coding);
 934                 add_trace("progress", "location", "%d", mncc->progress.location);
 935                 add_trace("progress", "descr", "%d", mncc->progress.descr);
 936         }
 937         end_trace();
 938         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 939
 940         new_state(PORT_STATE_IN_ALERTING);
 941
 942         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
 943                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 944                 end_trace();
 945                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 946                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 947                 p_g_tch_connected = 1;
 948         }
 949
 950         /* modify to GSM FR, if not already */
 951         if (!p_g_media_type) {
 952                 modify_lchan(MEDIA_TYPE_GSM);
 953         }
 954 }
 955
 956 /* MESSAGE_CONNECT */
 957 void Pgsm::message_connect(unsigned int epoint_id, int message_id, union parameter *param)
 958 {
 959         struct gsm_mncc *mncc;
 960
 961         /* copy connected information */
 962         memcpy(&p_connectinfo, &param->connectinfo, sizeof(p_connectinfo));
 963         /* screen outgoing caller id */
 964         do_screen(1, p_connectinfo.id, sizeof(p_connectinfo.id), &p_connectinfo.ntype, &p_connectinfo.present, p_interface_name);
 965
 966         /* send connect */
 967         mncc = create_mncc(MNCC_SETUP_RSP, p_g_callref);
 968         gsm_trace_header(p_interface_name, this, MNCC_SETUP_RSP, DIRECTION_OUT);
 969         /* caller information */
 970         mncc->fields |= MNCC_F_CONNECTED;
 971         mncc->connected.plan = 1;
 972         switch (p_callerinfo.ntype) {
 973                 case INFO_NTYPE_UNKNOWN:
 974                 mncc->connected.type = 0x0;
 975                 break;
 976                 case INFO_NTYPE_INTERNATIONAL:
 977                 mncc->connected.type = 0x1;
 978                 break;
 979                 case INFO_NTYPE_NATIONAL:
 980                 mncc->connected.type = 0x2;
 981                 break;
 982                 case INFO_NTYPE_SUBSCRIBER:
 983                 mncc->connected.type = 0x4;
 984                 break;
 985                 default: /* INFO_NTYPE_NOTPRESENT */
 986                 mncc->fields &= ~MNCC_F_CONNECTED;
 987                 break;
 988         }
 989         switch (p_callerinfo.screen) {
 990                 case INFO_SCREEN_USER:
 991                 mncc->connected.screen = 0;
 992                 break;
 993                 default: /* INFO_SCREEN_NETWORK */
 994                 mncc->connected.screen = 3;
 995                 break;
 996         }
 997         switch (p_callerinfo.present) {
 998                 case INFO_PRESENT_ALLOWED:
 999                 mncc->connected.present = 0;
1000                 break;
1001                 case INFO_PRESENT_RESTRICTED:
1002                 mncc->connected.present = 1;
1003                 break;
1004                 default: /* INFO_PRESENT_NOTAVAIL */
1005                 mncc->connected.present = 2;
1006                 break;
1007         }
1008         if (mncc->fields & MNCC_F_CONNECTED) {
1009                 SCPY(mncc->connected.number, p_connectinfo.id);
1010                 add_trace("connected", "type", "%d", mncc->connected.type);
1011                 add_trace("connected", "plan", "%d", mncc->connected.plan);
1012                 add_trace("connected", "present", "%d", mncc->connected.present);
1013                 add_trace("connected", "screen", "%d", mncc->connected.screen);
1014                 add_trace("connected", "number", "%s", mncc->connected.number);
1015         }
1016         end_trace();
1017         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1018
1019         new_state(PORT_STATE_CONNECT_WAITING);
1020
1021         if (param->connectinfo.rtpinfo.port) {
1022                 PDEBUG(DEBUG_GSM, "CONNECT with RTP peer info, sent to BSC (%08x,%d)\n", param->connectinfo.rtpinfo.ip, param->connectinfo.rtpinfo.port);
1023
1024                 /* modify channel to givne type, also sets media type */
1025                 modify_lchan(param->connectinfo.rtpinfo.media_types[0]);
1026
1027                 /* connect RTP */
1028                 p_g_rtp_ip_remote = param->connectinfo.rtpinfo.ip;
1029                 p_g_rtp_port_remote = param->connectinfo.rtpinfo.port;
1030                 /* p_g_media_type is already set by modify_lchan() */
1031                 p_g_payload_type = param->connectinfo.rtpinfo.payload_types[0];
1032                 send_mncc_rtp_connect();
1033         }
1034 }
1035
1036 /* MESSAGE_DISCONNECT */
1037 void Pgsm::message_disconnect(unsigned int epoint_id, int message_id, union parameter *param)
1038 {
1039         struct gsm_mncc *mncc;
1040
1041         /* send disconnect */
1042         mncc = create_mncc(MNCC_DISC_REQ, p_g_callref);
1043         gsm_trace_header(p_interface_name, this, MNCC_DISC_REQ, DIRECTION_OUT);
1044         if (p_g_tones) {
1045                 mncc->fields |= MNCC_F_PROGRESS;
1046                 mncc->progress.coding = 3; /* GSM */
1047                 mncc->progress.location = 1;
1048                 mncc->progress.descr = 8;
1049                 add_trace("progress", "coding", "%d", mncc->progress.coding);
1050                 add_trace("progress", "location", "%d", mncc->progress.location);
1051                 add_trace("progress", "descr", "%d", mncc->progress.descr);
1052         }
1053         mncc->fields |= MNCC_F_CAUSE;
1054         mncc->cause.coding = 3;
1055         mncc->cause.location = param->disconnectinfo.location;
1056         mncc->cause.value = param->disconnectinfo.cause;
1057         add_trace("cause", "coding", "%d", mncc->cause.coding);
1058         add_trace("cause", "location", "%d", mncc->cause.location);
1059         add_trace("cause", "value", "%d", mncc->cause.value);
1060         end_trace();
1061         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1062
1063         new_state(PORT_STATE_OUT_DISCONNECT);
1064
1065         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
1066                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
1067                 end_trace();
1068                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
1069                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1070                 p_g_tch_connected = 1;
1071         }
1072 }
1073
1074
1075 /* MESSAGE_RELEASE */
1076 void Pgsm::message_release(unsigned int epoint_id, int message_id, union parameter *param)
1077 {
1078         struct gsm_mncc *mncc;
1079
1080         /* send release */
1081         mncc = create_mncc(MNCC_REL_REQ, p_g_callref);
1082         gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
1083         mncc->fields |= MNCC_F_CAUSE;
1084         mncc->cause.coding = 3;
1085         mncc->cause.location = param->disconnectinfo.location;
1086         mncc->cause.value = param->disconnectinfo.cause;
1087         add_trace("cause", "coding", "%d", mncc->cause.coding);
1088         add_trace("cause", "location", "%d", mncc->cause.location);
1089         add_trace("cause", "value", "%d", mncc->cause.value);
1090         end_trace();
1091         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
1092
1093         new_state(PORT_STATE_RELEASE);
1094         trigger_work(&p_g_delete);
1095         return;
1096 }
1097
1098 /*
1099  * endpoint sends messages to the port
1100  */
1101 int Pgsm::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
1102 {
1103         int ret = 0;
1104
1105         if (Port::message_epoint(epoint_id, message_id, param))
1106                 return 1;
1107
1108         switch(message_id) {
1109                 case MESSAGE_NOTIFY: /* display and notifications */
1110                 ret = 1;
1111                 message_notify(epoint_id, message_id, param);
1112                 break;
1113
1114 //              case MESSAGE_FACILITY: /* facility message */
1115 //              message_facility(epoint_id, message_id, param);
1116 //              break;
1117
1118                 case MESSAGE_PROCEEDING: /* message not handles */
1119                 ret = 1;
1120                 break;
1121
1122                 case MESSAGE_PROGRESS:
1123                 ret = 1;
1124                 message_progress(epoint_id, message_id, param);
1125                 break;
1126
1127                 case MESSAGE_ALERTING: /* call of endpoint is ringing */
1128                 ret = 1;
1129                 if (p_state!=PORT_STATE_IN_PROCEEDING)
1130                         break;
1131                 message_alerting(epoint_id, message_id, param);
1132                 if (p_g_notify_pending) {
1133                         /* send pending notify message during connect */
1134                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
1135                         message_free(p_g_notify_pending);
1136                         p_g_notify_pending = NULL;
1137                 }
1138                 break;
1139
1140                 case MESSAGE_CONNECT: /* call of endpoint is connected */
1141                 ret = 1;
1142                 if (p_state!=PORT_STATE_IN_PROCEEDING
1143                  && p_state!=PORT_STATE_IN_ALERTING)
1144                         break;
1145                 message_connect(epoint_id, message_id, param);
1146                 if (p_g_notify_pending) {
1147                         /* send pending notify message during connect */
1148                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
1149                         message_free(p_g_notify_pending);
1150                         p_g_notify_pending = NULL;
1151                 }
1152                 break;
1153
1154                 case MESSAGE_DISCONNECT: /* call has been disconnected */
1155                 ret = 1;
1156                 if (p_state!=PORT_STATE_IN_PROCEEDING
1157                  && p_state!=PORT_STATE_IN_ALERTING
1158                  && p_state!=PORT_STATE_OUT_SETUP
1159                  && p_state!=PORT_STATE_OUT_OVERLAP
1160                  && p_state!=PORT_STATE_OUT_PROCEEDING
1161                  && p_state!=PORT_STATE_OUT_ALERTING
1162                  && p_state!=PORT_STATE_CONNECT
1163                  && p_state!=PORT_STATE_CONNECT_WAITING)
1164                         break;
1165                 message_disconnect(epoint_id, message_id, param);
1166                 break;
1167
1168                 case MESSAGE_RELEASE: /* release isdn port */
1169                 ret = 1;
1170                 if (p_state==PORT_STATE_RELEASE)
1171                         break;
1172                 message_release(epoint_id, message_id, param);
1173                 break;
1174
1175         }
1176
1177         return ret;
1178 }
1179
1180 /* deletes only if l3id is release, otherwhise it will be triggered then */
1181 static int delete_event(struct lcr_work *work, void *instance, int index)
1182 {
1183         class Pgsm *gsmport = (class Pgsm *)instance;
1184
1185         delete gsmport;
1186
1187         return 0;
1188 }
1189
1190 int gsm_exit(int rc)
1191 {
1192         return(rc);
1193 }
1194
1195 int gsm_init(void)
1196 {
1197         /* seed the PRNG */
1198         srand(time(NULL));
1199
1200         return 0;
1201 }
1202
1203 /*
1204  * MNCC interface
1205  */
1206
1207 static int mncc_q_enqueue(struct lcr_gsm *lcr_gsm, struct gsm_mncc *mncc, unsigned int len)
1208 {
1209         struct mncc_q_entry *qe;
1210
1211         qe = (struct mncc_q_entry *) MALLOC(sizeof(*qe)+sizeof(*mncc)+len);
1212         if (!qe)
1213                 return -ENOMEM;
1214
1215         qe->next = NULL;
1216         qe->len = len;
1217         memcpy(qe->data, mncc, len);
1218
1219         /* in case of empty list ... */
1220         if (!lcr_gsm->mncc_q_hd && !lcr_gsm->mncc_q_tail) {
1221                 /* the list head and tail both point to the new qe */
1222                 lcr_gsm->mncc_q_hd = lcr_gsm->mncc_q_tail = qe;
1223         } else {
1224                 /* append to tail of list */
1225                 lcr_gsm->mncc_q_tail->next = qe;
1226                 lcr_gsm->mncc_q_tail = qe;
1227         }
1228
1229         lcr_gsm->mncc_lfd.when |= LCR_FD_WRITE;
1230
1231         return 0;
1232 }
1233
1234 static struct mncc_q_entry *mncc_q_dequeue(struct lcr_gsm *lcr_gsm)
1235 {
1236         struct mncc_q_entry *qe = lcr_gsm->mncc_q_hd;
1237         if (!qe)
1238                 return NULL;
1239
1240         /* dequeue the successfully sent message */
1241         lcr_gsm->mncc_q_hd = qe->next;
1242         if (!qe)
1243                 return NULL;
1244         if (qe == lcr_gsm->mncc_q_tail)
1245                 lcr_gsm->mncc_q_tail = NULL;
1246
1247         return qe;
1248 }
1249
1250 /* routine called by LCR code if it wants to send a message to OpenBSC */
1251 static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data)
1252 {
1253         int len = 0;
1254
1255         /* FIXME: the caller should provide this */
1256         switch (msg_type) {
1257         case GSM_TCHF_FRAME:
1258                 len = sizeof(struct gsm_data_frame) + 33;
1259                 break;
1260         default:
1261                 len = sizeof(struct gsm_mncc);
1262                 break;
1263         }
1264
1265         return mncc_q_enqueue(lcr_gsm, (struct gsm_mncc *)data, len);
1266 }
1267
1268 /* close MNCC socket */
1269 static int mncc_fd_close(struct lcr_gsm *lcr_gsm, struct lcr_fd *lfd)
1270 {
1271         class Port *port;
1272         class Pgsm *pgsm = NULL;
1273         struct lcr_msg *message;
1274
1275         PERROR("Lost MNCC socket, retrying in %u seconds\n", SOCKET_RETRY_TIMER);
1276         close(lfd->fd);
1277         unregister_fd(lfd);
1278         lfd->fd = -1;
1279
1280         /* free all the calls that were running through the MNCC interface */
1281         port = port_first;
1282         while(port) {
1283                 if ((port->p_type & PORT_CLASS_mISDN_MASK) == PORT_CLASS_GSM) {
1284                         pgsm = (class Pgsm *)port;
1285                         if (pgsm->p_g_lcr_gsm == lcr_gsm) {
1286                                 message = message_create(pgsm->p_serial, ACTIVE_EPOINT(pgsm->p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
1287                                 message->param.disconnectinfo.cause = 27; // temp. unavail.
1288                                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
1289                                 message_put(message);
1290                                 pgsm->new_state(PORT_STATE_RELEASE);
1291                                 trigger_work(&pgsm->p_g_delete);
1292                         }
1293                 }
1294                 port = port->next;
1295         }
1296
1297         /* flush the queue */
1298         while (mncc_q_dequeue(lcr_gsm))
1299                 ;
1300
1301         /* start the re-connect timer */
1302         schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1303
1304         return 0;
1305 }
1306
1307 /* write to OpenBSC via MNCC socket */
1308 static int mncc_fd_write(struct lcr_fd *lfd, void *inst, int idx)
1309 {
1310         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1311         struct mncc_q_entry *qe, *qe2;
1312         int rc;
1313
1314         while (1) {
1315                 qe = lcr_gsm->mncc_q_hd;
1316                 if (!qe) {
1317                         lfd->when &= ~LCR_FD_WRITE;
1318                         break;
1319                 }
1320                 rc = write(lfd->fd, qe->data, qe->len);
1321                 if (rc == 0)
1322                         return mncc_fd_close(lcr_gsm, lfd);
1323                 if (rc < 0)
1324                         return rc;
1325                 if (rc < (int)qe->len)
1326                         return -1;
1327                 /* dequeue the successfully sent message */
1328                 qe2 = mncc_q_dequeue(lcr_gsm);
1329                 assert(qe == qe2);
1330                 free(qe);
1331         }
1332         return 0;
1333 }
1334
1335 /* read from OpenBSC via MNCC socket */
1336 static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
1337 {
1338         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1339         int rc;
1340         static char buf[sizeof(struct gsm_mncc)+1024];
1341         struct gsm_mncc *mncc_prim = (struct gsm_mncc *) buf;
1342         struct gsm_mncc_hello *hello = (struct gsm_mncc_hello *) buf;
1343
1344         memset(buf, 0, sizeof(buf));
1345         rc = recv(lfd->fd, buf, sizeof(buf), 0);
1346         if (rc == 0)
1347                 return mncc_fd_close(lcr_gsm, lfd);
1348         if (rc < 0)
1349                 return rc;
1350
1351         /* TODO: size check? */
1352         switch (mncc_prim->msg_type) {
1353         case MNCC_SOCKET_HELLO:
1354                 if (hello->version != MNCC_SOCK_VERSION) {
1355                         PERROR("MNCC version different. BSC version is %u\n", hello->version);
1356                         mncc_fd_close(lcr_gsm, lfd);
1357                         return 0;
1358                 }
1359                 if (hello->mncc_size != sizeof(struct gsm_mncc)) {
1360                         PERROR("MNCC gsm_mncc size differs: %u %u\n",
1361                                 hello->mncc_size, sizeof(struct gsm_mncc));
1362                         mncc_fd_close(lcr_gsm, lfd);
1363                         return 0;
1364                 }
1365                 if (hello->data_frame_size != sizeof(struct gsm_data_frame)) {
1366                         PERROR("MNCC gsm_mncc size differs: %u %u\n",
1367                                 hello->data_frame_size, sizeof(struct gsm_data_frame));
1368                         mncc_fd_close(lcr_gsm, lfd);
1369                         return 0;
1370                 }
1371
1372 #define CHECK_OFFSET(hello, field, lcr_gsm, lfd)        \
1373                 if (hello->field ##_offset != __builtin_offsetof(struct gsm_mncc, field)) {     \
1374                         PERROR("MNCC gsm_mncc offset of %s is %u %u\n",                         \
1375                                 #field, hello->field ##_offset,                                 \
1376                                 __builtin_offsetof(struct gsm_mncc, field));                    \
1377                         mncc_fd_close(lcr_gsm, lfd);                                            \
1378                         return 0;                                                               \
1379                 }
1380
1381                 CHECK_OFFSET(hello, called, lcr_gsm, lfd);
1382                 CHECK_OFFSET(hello, signal, lcr_gsm, lfd);
1383                 CHECK_OFFSET(hello, emergency, lcr_gsm, lfd);
1384                 CHECK_OFFSET(hello, lchan_type, lcr_gsm, lfd);
1385 #undef CHECK_OFFSET
1386
1387                 break;
1388         }
1389
1390         /* Hand the MNCC message into LCR */
1391         switch (lcr_gsm->type) {
1392 #ifdef WITH_GSM_BS
1393         case LCR_GSM_TYPE_NETWORK:
1394                 return message_bsc(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1395 #endif
1396 #ifdef WITH_GSM_MS
1397         case LCR_GSM_TYPE_MS:
1398                 return message_ms(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1399 #endif
1400         default:
1401                 return 0;
1402         }
1403 }
1404
1405 /* file descriptor callback if we can read or write form MNCC socket */
1406 static int mncc_fd_cb(struct lcr_fd *lfd, unsigned int what, void *inst, int idx)
1407 {
1408         int rc = 0;
1409
1410         if (what & LCR_FD_READ)
1411                 rc = mncc_fd_read(lfd, inst, idx);
1412         if (rc < 0)
1413                 return rc;
1414
1415         if (what & LCR_FD_WRITE)
1416                 rc = mncc_fd_write(lfd, inst, idx);
1417
1418         return rc;
1419 }
1420
1421 int mncc_socket_retry_cb(struct lcr_timer *timer, void *inst, int index)
1422 {
1423         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1424         int fd, rc;
1425
1426         lcr_gsm->mncc_lfd.fd = -1;
1427
1428         fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
1429         if (fd < 0) {
1430                 PERROR("Cannot create SEQPACKET socket, giving up!\n");
1431                 return fd;
1432         }
1433
1434         rc = connect(fd, (struct sockaddr *) &lcr_gsm->sun,
1435                      sizeof(lcr_gsm->sun));
1436         if (rc < 0) {
1437                 PERROR("Could not connect to MNCC socket %s, "
1438                         "retrying in %u seconds\n", lcr_gsm->sun.sun_path,
1439                         SOCKET_RETRY_TIMER);
1440                 close(fd);
1441                 schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1442         } else {
1443                 PDEBUG(DEBUG_GSM, "Connected to MNCC socket %s!\n", lcr_gsm->sun.sun_path);
1444                 lcr_gsm->mncc_lfd.fd = fd;
1445                 register_fd(&lcr_gsm->mncc_lfd, LCR_FD_READ, &mncc_fd_cb, lcr_gsm, 0);
1446         }
1447
1448         return 0;
1449 }
1450