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 <mISDN/mISDNcompat.h>
  24 #include <assert.h>
  25
  26 #define SOCKET_RETRY_TIMER      5
  27
  28 //struct lcr_gsm *gsm = NULL;
  29
  30 int new_callref = 1;
  31
  32 /* names of MNCC-SAP */
  33 static const struct _value_string {
  34         int msg_type;
  35         const char *name;
  36 } mncc_names[] = {
  37         { 0,                    "New call ref" },
  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         { 0,                    NULL }
  86 };
  87
  88 const char *mncc_name(int value)
  89 {
  90         int i = 0;
  91
  92         while (mncc_names[i].name) {
  93                 if (mncc_names[i].msg_type == value)
  94                         return mncc_names[i].name;
  95                 i++;
  96         }
  97         return "unknown";
  98 }
  99
 100 static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data);
 101
 102 /*
 103  * create and send mncc message
 104  */
 105 struct gsm_mncc *create_mncc(int msg_type, unsigned int callref)
 106 {
 107         struct gsm_mncc *mncc;
 108
 109         mncc = (struct gsm_mncc *)MALLOC(sizeof(struct gsm_mncc));
 110         mncc->msg_type = msg_type;
 111         mncc->callref = callref;
 112         return (mncc);
 113 }
 114 int send_and_free_mncc(struct lcr_gsm *lcr_gsm, unsigned int msg_type, void *data)
 115 {
 116         int ret = 0;
 117
 118         if (lcr_gsm) {
 119                 ret = mncc_send(lcr_gsm, msg_type, data);
 120         }
 121         free(data);
 122
 123         return ret;
 124 }
 125
 126 static int delete_event(struct lcr_work *work, void *instance, int index);
 127
 128 /*
 129  * constructor
 130  */
 131 Pgsm::Pgsm(int type, char *portname, struct port_settings *settings, struct interface *interface) : Port(type, portname, settings)
 132 {
 133         p_g_tones = 0;
 134         if (interface->is_tones == IS_YES)
 135                 p_g_tones = 1;
 136         p_g_earlyb = 0;
 137         if (interface->is_earlyb == IS_YES)
 138                 p_g_earlyb = 1;
 139         p_g_rtp_bridge = 0;
 140         if (interface->rtp_bridge)
 141                 p_g_rtp_bridge = 1;
 142         SCPY(p_g_interface_name, interface->name);
 143         p_callerinfo.itype = (interface->extension)?INFO_ITYPE_ISDN_EXTENSION:INFO_ITYPE_ISDN;
 144         memset(&p_g_delete, 0, sizeof(p_g_delete));
 145         add_work(&p_g_delete, delete_event, this, 0);
 146         p_g_lcr_gsm = NULL;
 147         p_g_callref = 0;
 148         p_g_mode = 0;
 149         p_g_gsm_b_sock = -1;
 150         p_g_gsm_b_index = -1;
 151         p_g_gsm_b_active = 0;
 152         p_g_notify_pending = NULL;
 153         p_g_setup_pending = NULL;
 154         p_g_connect_pending = NULL;
 155         p_g_decoder = gsm_audio_create();
 156         p_g_encoder = gsm_audio_create();
 157         if (!p_g_encoder || !p_g_decoder) {
 158                 PERROR("Failed to create GSM audio codec instance\n");
 159                 trigger_work(&p_g_delete);
 160         }
 161         p_g_rxpos = 0;
 162         p_g_tch_connected = 0;
 163
 164         PDEBUG(DEBUG_GSM, "Created new GSMPort(%s).\n", portname);
 165 }
 166
 167 /*
 168  * destructor
 169  */
 170 Pgsm::~Pgsm()
 171 {
 172         PDEBUG(DEBUG_GSM, "Destroyed GSM process(%s).\n", p_name);
 173
 174         del_work(&p_g_delete);
 175
 176         /* remove queued message */
 177         if (p_g_notify_pending)
 178                 message_free(p_g_notify_pending);
 179         if (p_g_setup_pending)
 180                 message_free(p_g_setup_pending);
 181         if (p_g_connect_pending)
 182                 message_free(p_g_connect_pending);
 183
 184         /* close codec */
 185         if (p_g_encoder)
 186                 gsm_audio_destroy(p_g_encoder);
 187         if (p_g_decoder)
 188                 gsm_audio_destroy(p_g_decoder);
 189 }
 190
 191
 192 /* receive encoded frame from gsm */
 193 void Pgsm::frame_receive(void *arg)
 194 {
 195         struct gsm_data_frame *frame = (struct gsm_data_frame *)arg;
 196         signed short samples[160];
 197         unsigned char data[160];
 198         int i;
 199
 200         if (!p_g_decoder)
 201                 return;
 202
 203         if ((frame->data[0]>>4) != 0xd)
 204                 PERROR("received GSM frame with wrong magig 0x%x\n", frame->data[0]>>4);
 205
 206         /* decode */
 207         gsm_audio_decode(p_g_decoder, frame->data, samples);
 208         for (i = 0; i < 160; i++) {
 209                 data[i] = audio_s16_to_law[samples[i] & 0xffff];
 210         }
 211
 212         /* send to remote*/
 213         bridge_tx(data, 160);
 214 }
 215
 216 /* send traffic to gsm */
 217 int Pgsm::bridge_rx(unsigned char *data, int len)
 218 {
 219         unsigned char frame[33];
 220
 221         /* encoder init failed */
 222         if (!p_g_encoder)
 223                 return -EINVAL;
 224
 225         /* (currently) not connected, so don't flood tch! */
 226         if (!p_g_tch_connected)
 227                 return -EINVAL;
 228
 229         /* write to rx buffer */
 230         while(len--) {
 231                 p_g_rxdata[p_g_rxpos++] = audio_law_to_s32[*data++];
 232                 if (p_g_rxpos == 160) {
 233                         p_g_rxpos = 0;
 234
 235                         /* encode data */
 236                         gsm_audio_encode(p_g_encoder, p_g_rxdata, frame);
 237                         frame_send(frame);
 238                 }
 239         }
 240
 241         return 0;
 242 }
 243
 244 void Pgsm::frame_send(void *_frame)
 245 {
 246         unsigned char buffer[sizeof(struct gsm_data_frame) + 33];
 247         struct gsm_data_frame *frame = (struct gsm_data_frame *)buffer;
 248
 249         frame->msg_type = GSM_TCHF_FRAME;
 250         frame->callref = p_g_callref;
 251         memcpy(frame->data, _frame, 33);
 252
 253         if (p_g_lcr_gsm) {
 254                 mncc_send(p_g_lcr_gsm, frame->msg_type, frame);
 255         }
 256 }
 257
 258 /*
 259  * create trace
 260  */
 261 void gsm_trace_header(const char *interface_name, class Pgsm *port, unsigned int msg_type, int direction)
 262 {
 263         char msgtext[64];
 264         struct interface *interface = interface_first;
 265
 266         while (interface) {
 267                 if (!strcmp(interface->name, interface_name))
 268                         break;
 269                 interface = interface->next;
 270         }
 271         if (!interface)
 272                 return;
 273
 274         /* select message and primitive text */
 275         SCPY(msgtext, mncc_name(msg_type));
 276
 277         /* add direction */
 278         if (port) {
 279                 switch(port->p_type) {
 280                 case PORT_TYPE_GSM_BS_OUT:
 281                 case PORT_TYPE_GSM_BS_IN:
 282                         SCAT(msgtext, " LCR<->BSC");
 283                         break;
 284                 case PORT_TYPE_GSM_MS_OUT:
 285                 case PORT_TYPE_GSM_MS_IN:
 286                         SCAT(msgtext, " LCR<->MS");
 287                         break;
 288                 }
 289         } else
 290                 SCAT(msgtext, " ----");
 291
 292         /* init trace with given values */
 293         start_trace(0,
 294                     interface,
 295                     port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
 296                     port?port->p_dialinginfo.id:NULL,
 297                     direction,
 298                     CATEGORY_CH,
 299                     port?port->p_serial:0,
 300                     msgtext);
 301 }
 302
 303 /* PROCEEDING INDICATION */
 304 void Pgsm::call_conf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 305 {
 306         struct gsm_mncc *mode;
 307
 308         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 309         if (mncc->fields & MNCC_F_CAUSE) {
 310                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 311                 add_trace("cause", "location", "%", mncc->cause.location);
 312                 add_trace("cause", "value", "%", mncc->cause.value);
 313         }
 314         end_trace();
 315
 316         /* modify lchan to GSM codec V1 */
 317         gsm_trace_header(p_g_interface_name, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
 318         mode = create_mncc(MNCC_LCHAN_MODIFY, p_g_callref);
 319         mode->lchan_mode = 0x01; /* GSM V1 */
 320         mode->lchan_type = 0x02;
 321         add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
 322         end_trace();
 323         send_and_free_mncc(p_g_lcr_gsm, mode->msg_type, mode);
 324
 325 }
 326
 327 /* CALL PROCEEDING INDICATION */
 328 void Pgsm::call_proc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 329 {
 330         struct lcr_msg *message;
 331         struct gsm_mncc *frame;
 332
 333         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 334         end_trace();
 335
 336         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
 337         message_put(message);
 338
 339         new_state(PORT_STATE_OUT_PROCEEDING);
 340
 341         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 342                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 343                 end_trace();
 344                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 345                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 346                 p_g_tch_connected = 1;
 347         }
 348 }
 349
 350 /* ALERTING INDICATION */
 351 void Pgsm::alert_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 352 {
 353         struct lcr_msg *message;
 354         struct gsm_mncc *frame;
 355
 356         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 357         end_trace();
 358
 359         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_ALERTING);
 360         message_put(message);
 361
 362         new_state(PORT_STATE_OUT_ALERTING);
 363
 364         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 365                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 366                 end_trace();
 367                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 368                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 369                 p_g_tch_connected = 1;
 370         }
 371 }
 372
 373 /* CONNECT INDICATION */
 374 void Pgsm::setup_cnf(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 375 {
 376         struct gsm_mncc *resp, *frame;
 377         struct lcr_msg *message;
 378
 379         SCPY(p_connectinfo.id, mncc->connected.number);
 380         SCPY(p_connectinfo.imsi, mncc->imsi);
 381         p_connectinfo.present = INFO_PRESENT_ALLOWED;
 382         p_connectinfo.screen = INFO_SCREEN_NETWORK;
 383         p_connectinfo.ntype = INFO_NTYPE_UNKNOWN;
 384         SCPY(p_connectinfo.interface, p_g_interface_name);
 385
 386         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 387         if (p_connectinfo.id[0])
 388                 add_trace("connect", "number", "%s", p_connectinfo.id);
 389         else if (mncc->imsi[0])
 390                 SPRINT(p_connectinfo.id, "imsi-%s", p_connectinfo.imsi);
 391         if (mncc->imsi[0])
 392                 add_trace("connect", "imsi", "%s", p_connectinfo.imsi);
 393         end_trace();
 394
 395         /* send resp */
 396         gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_COMPL_REQ, DIRECTION_OUT);
 397         resp = create_mncc(MNCC_SETUP_COMPL_REQ, p_g_callref);
 398         end_trace();
 399         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 400
 401         new_state(PORT_STATE_CONNECT);
 402
 403         if (!p_g_tch_connected) { /* only if ... */
 404                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 405                 end_trace();
 406                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 407                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 408                 p_g_tch_connected = 1;
 409         }
 410
 411         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
 412         memcpy(&message->param.connectinfo, &p_connectinfo, sizeof(struct connect_info));
 413         message->param.connectinfo.rtpinfo.payload_type = 3; /* FIXME: receive payload type from peer */
 414
 415         if (p_g_rtp_bridge) {
 416                 struct gsm_mncc_rtp *rtp;
 417
 418                 PDEBUG(DEBUG_GSM, "Request RTP peer info, before forwarding connect msg\n");
 419                 p_g_connect_pending = message;
 420                 rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CREATE, p_g_callref);
 421                 send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
 422         } else
 423                 message_put(message);
 424 }
 425
 426 /* CONNECT ACK INDICATION */
 427 void Pgsm::setup_compl_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 428 {
 429         struct gsm_mncc *frame;
 430
 431         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 432         end_trace();
 433
 434         new_state(PORT_STATE_CONNECT);
 435
 436         if (!p_g_tch_connected) { /* only if ... */
 437                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 438                 end_trace();
 439                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 440                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 441                 p_g_tch_connected = 1;
 442         }
 443 }
 444
 445 /* DISCONNECT INDICATION */
 446 void Pgsm::disc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 447 {
 448         struct lcr_msg *message;
 449         int cause = 16, location = 0;
 450         struct gsm_mncc *resp;
 451
 452         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 453         if (mncc->fields & MNCC_F_CAUSE) {
 454                 location = mncc->cause.location;
 455                 cause = mncc->cause.value;
 456                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 457                 add_trace("cause", "location", "%d", location);
 458                 add_trace("cause", "value", "%d", cause);
 459         }
 460         end_trace();
 461
 462         /* send release */
 463         resp = create_mncc(MNCC_REL_REQ, p_g_callref);
 464         gsm_trace_header(p_g_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
 465 #if 0
 466         resp->fields |= MNCC_F_CAUSE;
 467         resp->cause.coding = 3;
 468         resp->cause.location = 1;
 469         resp->cause.value = cause;
 470         add_trace("cause", "coding", "%d", resp->cause.coding);
 471         add_trace("cause", "location", "%d", resp->cause.location);
 472         add_trace("cause", "value", "%d", resp->cause.value);
 473 #endif
 474         end_trace();
 475         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 476
 477         /* sending release to endpoint */
 478         while(p_epointlist) {
 479                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 480                 message->param.disconnectinfo.cause = cause;
 481                 message->param.disconnectinfo.location = location;
 482                 message_put(message);
 483                 /* remove epoint */
 484                 free_epointlist(p_epointlist);
 485         }
 486         new_state(PORT_STATE_RELEASE);
 487         trigger_work(&p_g_delete);
 488 }
 489
 490 /* CC_RELEASE INDICATION */
 491 void Pgsm::rel_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 492 {
 493         int location = 0, cause = 16;
 494         struct lcr_msg *message;
 495
 496         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 497         if (mncc->fields & MNCC_F_CAUSE) {
 498                 location = mncc->cause.location;
 499                 cause = mncc->cause.value;
 500                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 501                 add_trace("cause", "location", "%d", mncc->cause.location);
 502                 add_trace("cause", "value", "%d", mncc->cause.value);
 503         }
 504         end_trace();
 505
 506         /* sending release to endpoint */
 507         while(p_epointlist) {
 508                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 509                 message->param.disconnectinfo.cause = cause;
 510                 message->param.disconnectinfo.location = location;
 511                 message_put(message);
 512                 /* remove epoint */
 513                 free_epointlist(p_epointlist);
 514         }
 515         new_state(PORT_STATE_RELEASE);
 516         trigger_work(&p_g_delete);
 517 }
 518
 519 /* NOTIFY INDICATION */
 520 void Pgsm::notify_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 521 {
 522         struct lcr_msg *message;
 523
 524         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 525         add_trace("notify", NULL, "%d", mncc->notify);
 526         end_trace();
 527
 528         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 529         message->param.notifyinfo.notify = mncc->notify;
 530         message_put(message);
 531 }
 532
 533 /* MESSAGE_NOTIFY */
 534 void Pgsm::message_notify(unsigned int epoint_id, int message_id, union parameter *param)
 535 {
 536         struct gsm_mncc *mncc;
 537         int notify;
 538
 539 //      printf("if = %d\n", param->notifyinfo.notify);
 540         if (param->notifyinfo.notify>INFO_NOTIFY_NONE) {
 541                 notify = param->notifyinfo.notify & 0x7f;
 542                 if (p_state!=PORT_STATE_CONNECT /*&& p_state!=PORT_STATE_IN_PROCEEDING*/ && p_state!=PORT_STATE_IN_ALERTING) {
 543                         /* queue notification */
 544                         if (p_g_notify_pending)
 545                                 message_free(p_g_notify_pending);
 546                         p_g_notify_pending = message_create(ACTIVE_EPOINT(p_epointlist), p_serial, EPOINT_TO_PORT, message_id);
 547                         memcpy(&p_g_notify_pending->param, param, sizeof(union parameter));
 548                 } else {
 549                         /* sending notification */
 550                         gsm_trace_header(p_g_interface_name, this, MNCC_NOTIFY_REQ, DIRECTION_OUT);
 551                         add_trace("notify", NULL, "%d", notify);
 552                         end_trace();
 553                         mncc = create_mncc(MNCC_NOTIFY_REQ, p_g_callref);
 554                         mncc->notify = notify;
 555                         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 556                 }
 557         }
 558 }
 559
 560 /* RTP create indication */
 561 void Pgsm::rtp_create_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 562 {
 563         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 564
 565         /* send queued setup, as we received remote RTP info */
 566         if (p_g_setup_pending) {
 567                 struct lcr_msg *message;
 568
 569                 message = p_g_setup_pending;
 570                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding setup\n", rtp->ip, rtp->port);
 571                 message->param.setup.rtpinfo.ip = rtp->ip;
 572                 message->param.setup.rtpinfo.port = rtp->port;
 573                 message_put(message);
 574                 p_g_setup_pending = NULL;
 575         }
 576         if (p_g_connect_pending) {
 577                 struct gsm_mncc_rtp *nrtp;
 578
 579                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) connecting RTP... \n", rtp->ip, rtp->port);
 580                 nrtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CONNECT, p_g_callref);
 581                 nrtp->ip = p_g_rtp_ip_remote;
 582                 nrtp->port = p_g_rtp_port_remote;
 583                 send_and_free_mncc(p_g_lcr_gsm, nrtp->msg_type, nrtp);
 584         }
 585 }
 586
 587 /* RTP connect indication */
 588 void Pgsm::rtp_connect_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 589 {
 590         struct lcr_msg *message;
 591         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 592
 593         if (p_g_connect_pending) {
 594                 message = p_g_connect_pending;
 595                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding connect\n", rtp->ip, rtp->port);
 596                 message->param.connectinfo.rtpinfo.ip = rtp->ip;
 597                 message->param.connectinfo.rtpinfo.port = rtp->port;
 598                 message_put(message);
 599                 p_g_connect_pending = NULL;
 600         }
 601 }
 602
 603 /* MESSAGE_PROGRESS */
 604 void Pgsm::message_progress(unsigned int epoint_id, int message_id, union parameter *param)
 605 {
 606         if (param->progressinfo.progress == 8) {
 607                 PDEBUG(DEBUG_GSM, "Remote provides tones for us\n");
 608                 p_g_tones = 1;
 609         }
 610
 611         if (param->progressinfo.rtpinfo.port) {
 612                 struct gsm_mncc_rtp *rtp;
 613
 614                 PDEBUG(DEBUG_GSM, "CONNECT with RTP peer info, sent to BSC (%08x,%d)\n", param->progressinfo.rtpinfo.ip, param->progressinfo.rtpinfo.port);
 615                 rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CONNECT, p_g_callref);
 616                 rtp->ip = param->progressinfo.rtpinfo.ip;
 617                 rtp->port = param->progressinfo.rtpinfo.port;
 618                 send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
 619         }
 620 }
 621
 622 /* MESSAGE_ALERTING */
 623 void Pgsm::message_alerting(unsigned int epoint_id, int message_id, union parameter *param)
 624 {
 625         struct gsm_mncc *mncc;
 626
 627         /* send alert */
 628         gsm_trace_header(p_g_interface_name, this, MNCC_ALERT_REQ, DIRECTION_OUT);
 629         mncc = create_mncc(MNCC_ALERT_REQ, p_g_callref);
 630         if (p_g_tones) {
 631                 mncc->fields |= MNCC_F_PROGRESS;
 632                 mncc->progress.coding = 3; /* GSM */
 633                 mncc->progress.location = 1;
 634                 mncc->progress.descr = 8;
 635                 add_trace("progress", "coding", "%d", mncc->progress.coding);
 636                 add_trace("progress", "location", "%d", mncc->progress.location);
 637                 add_trace("progress", "descr", "%d", mncc->progress.descr);
 638         }
 639         end_trace();
 640         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 641
 642         new_state(PORT_STATE_IN_ALERTING);
 643
 644         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
 645                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 646                 end_trace();
 647                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 648                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 649                 p_g_tch_connected = 1;
 650         }
 651 }
 652
 653 /* MESSAGE_CONNECT */
 654 void Pgsm::message_connect(unsigned int epoint_id, int message_id, union parameter *param)
 655 {
 656         struct gsm_mncc *mncc;
 657
 658         /* copy connected information */
 659         memcpy(&p_connectinfo, &param->connectinfo, sizeof(p_connectinfo));
 660         /* screen outgoing caller id */
 661         do_screen(1, p_connectinfo.id, sizeof(p_connectinfo.id), &p_connectinfo.ntype, &p_connectinfo.present, p_g_interface_name);
 662
 663         /* send connect */
 664         mncc = create_mncc(MNCC_SETUP_RSP, p_g_callref);
 665         gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_RSP, DIRECTION_OUT);
 666         /* caller information */
 667         mncc->fields |= MNCC_F_CONNECTED;
 668         mncc->connected.plan = 1;
 669         switch (p_callerinfo.ntype) {
 670                 case INFO_NTYPE_UNKNOWN:
 671                 mncc->connected.type = 0x0;
 672                 break;
 673                 case INFO_NTYPE_INTERNATIONAL:
 674                 mncc->connected.type = 0x1;
 675                 break;
 676                 case INFO_NTYPE_NATIONAL:
 677                 mncc->connected.type = 0x2;
 678                 break;
 679                 case INFO_NTYPE_SUBSCRIBER:
 680                 mncc->connected.type = 0x4;
 681                 break;
 682                 default: /* INFO_NTYPE_NOTPRESENT */
 683                 mncc->fields &= ~MNCC_F_CONNECTED;
 684                 break;
 685         }
 686         switch (p_callerinfo.screen) {
 687                 case INFO_SCREEN_USER:
 688                 mncc->connected.screen = 0;
 689                 break;
 690                 default: /* INFO_SCREEN_NETWORK */
 691                 mncc->connected.screen = 3;
 692                 break;
 693         }
 694         switch (p_callerinfo.present) {
 695                 case INFO_PRESENT_ALLOWED:
 696                 mncc->connected.present = 0;
 697                 break;
 698                 case INFO_PRESENT_RESTRICTED:
 699                 mncc->connected.present = 1;
 700                 break;
 701                 default: /* INFO_PRESENT_NOTAVAIL */
 702                 mncc->connected.present = 2;
 703                 break;
 704         }
 705         if (mncc->fields & MNCC_F_CONNECTED) {
 706                 SCPY(mncc->connected.number, p_connectinfo.id);
 707                 add_trace("connected", "type", "%d", mncc->connected.type);
 708                 add_trace("connected", "plan", "%d", mncc->connected.plan);
 709                 add_trace("connected", "present", "%d", mncc->connected.present);
 710                 add_trace("connected", "screen", "%d", mncc->connected.screen);
 711                 add_trace("connected", "number", "%s", mncc->connected.number);
 712         }
 713         end_trace();
 714         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 715
 716         new_state(PORT_STATE_CONNECT_WAITING);
 717
 718         if (param->connectinfo.rtpinfo.port) {
 719                 struct gsm_mncc_rtp *rtp;
 720
 721                 PDEBUG(DEBUG_GSM, "CONNECT with RTP peer info, sent to BSC (%08x,%d)\n", param->connectinfo.rtpinfo.ip, param->connectinfo.rtpinfo.port);
 722                 rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CONNECT, p_g_callref);
 723                 rtp->ip = param->connectinfo.rtpinfo.ip;
 724                 rtp->port = param->connectinfo.rtpinfo.port;
 725                 send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
 726         }
 727
 728 }
 729
 730 /* MESSAGE_DISCONNECT */
 731 void Pgsm::message_disconnect(unsigned int epoint_id, int message_id, union parameter *param)
 732 {
 733         struct gsm_mncc *mncc;
 734
 735         /* send disconnect */
 736         mncc = create_mncc(MNCC_DISC_REQ, p_g_callref);
 737         gsm_trace_header(p_g_interface_name, this, MNCC_DISC_REQ, DIRECTION_OUT);
 738         if (p_g_tones) {
 739                 mncc->fields |= MNCC_F_PROGRESS;
 740                 mncc->progress.coding = 3; /* GSM */
 741                 mncc->progress.location = 1;
 742                 mncc->progress.descr = 8;
 743                 add_trace("progress", "coding", "%d", mncc->progress.coding);
 744                 add_trace("progress", "location", "%d", mncc->progress.location);
 745                 add_trace("progress", "descr", "%d", mncc->progress.descr);
 746         }
 747         mncc->fields |= MNCC_F_CAUSE;
 748         mncc->cause.coding = 3;
 749         mncc->cause.location = param->disconnectinfo.location;
 750         mncc->cause.value = param->disconnectinfo.cause;
 751         add_trace("cause", "coding", "%d", mncc->cause.coding);
 752         add_trace("cause", "location", "%d", mncc->cause.location);
 753         add_trace("cause", "value", "%d", mncc->cause.value);
 754         end_trace();
 755         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 756
 757         new_state(PORT_STATE_OUT_DISCONNECT);
 758
 759         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
 760                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 761                 end_trace();
 762                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 763                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 764                 p_g_tch_connected = 1;
 765         }
 766 }
 767
 768
 769 /* MESSAGE_RELEASE */
 770 void Pgsm::message_release(unsigned int epoint_id, int message_id, union parameter *param)
 771 {
 772         struct gsm_mncc *mncc;
 773
 774         /* send release */
 775         mncc = create_mncc(MNCC_REL_REQ, p_g_callref);
 776         gsm_trace_header(p_g_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
 777         mncc->fields |= MNCC_F_CAUSE;
 778         mncc->cause.coding = 3;
 779         mncc->cause.location = param->disconnectinfo.location;
 780         mncc->cause.value = param->disconnectinfo.cause;
 781         add_trace("cause", "coding", "%d", mncc->cause.coding);
 782         add_trace("cause", "location", "%d", mncc->cause.location);
 783         add_trace("cause", "value", "%d", mncc->cause.value);
 784         end_trace();
 785         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 786
 787         new_state(PORT_STATE_RELEASE);
 788         trigger_work(&p_g_delete);
 789         return;
 790 }
 791
 792 /*
 793  * endpoint sends messages to the port
 794  */
 795 int Pgsm::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
 796 {
 797         int ret = 0;
 798
 799         if (Port::message_epoint(epoint_id, message_id, param))
 800                 return 1;
 801
 802         switch(message_id) {
 803                 case MESSAGE_NOTIFY: /* display and notifications */
 804                 ret = 1;
 805                 message_notify(epoint_id, message_id, param);
 806                 break;
 807
 808 //              case MESSAGE_FACILITY: /* facility message */
 809 //              message_facility(epoint_id, message_id, param);
 810 //              break;
 811
 812                 case MESSAGE_PROCEEDING: /* message not handles */
 813                 ret = 1;
 814                 break;
 815
 816                 case MESSAGE_PROGRESS:
 817                 ret = 1;
 818                 message_progress(epoint_id, message_id, param);
 819                 break;
 820
 821                 case MESSAGE_ALERTING: /* call of endpoint is ringing */
 822                 ret = 1;
 823                 if (p_state!=PORT_STATE_IN_PROCEEDING)
 824                         break;
 825                 message_alerting(epoint_id, message_id, param);
 826                 if (p_g_notify_pending) {
 827                         /* send pending notify message during connect */
 828                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
 829                         message_free(p_g_notify_pending);
 830                         p_g_notify_pending = NULL;
 831                 }
 832                 break;
 833
 834                 case MESSAGE_CONNECT: /* call of endpoint is connected */
 835                 ret = 1;
 836                 if (p_state!=PORT_STATE_IN_PROCEEDING
 837                  && p_state!=PORT_STATE_IN_ALERTING)
 838                         break;
 839                 message_connect(epoint_id, message_id, param);
 840                 if (p_g_notify_pending) {
 841                         /* send pending notify message during connect */
 842                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
 843                         message_free(p_g_notify_pending);
 844                         p_g_notify_pending = NULL;
 845                 }
 846                 break;
 847
 848                 case MESSAGE_DISCONNECT: /* call has been disconnected */
 849                 ret = 1;
 850                 if (p_state!=PORT_STATE_IN_PROCEEDING
 851                  && p_state!=PORT_STATE_IN_ALERTING
 852                  && p_state!=PORT_STATE_OUT_SETUP
 853                  && p_state!=PORT_STATE_OUT_OVERLAP
 854                  && p_state!=PORT_STATE_OUT_PROCEEDING
 855                  && p_state!=PORT_STATE_OUT_ALERTING
 856                  && p_state!=PORT_STATE_CONNECT
 857                  && p_state!=PORT_STATE_CONNECT_WAITING)
 858                         break;
 859                 message_disconnect(epoint_id, message_id, param);
 860                 break;
 861
 862                 case MESSAGE_RELEASE: /* release isdn port */
 863                 ret = 1;
 864                 if (p_state==PORT_STATE_RELEASE)
 865                         break;
 866                 message_release(epoint_id, message_id, param);
 867                 break;
 868
 869         }
 870
 871         return ret;
 872 }
 873
 874 /* deletes only if l3id is release, otherwhise it will be triggered then */
 875 static int delete_event(struct lcr_work *work, void *instance, int index)
 876 {
 877         class Pgsm *gsmport = (class Pgsm *)instance;
 878
 879         delete gsmport;
 880
 881         return 0;
 882 }
 883
 884 int gsm_exit(int rc)
 885 {
 886         return(rc);
 887 }
 888
 889 int gsm_init(void)
 890 {
 891         /* seed the PRNG */
 892         srand(time(NULL));
 893
 894         return 0;
 895 }
 896
 897 /*
 898  * MNCC interface
 899  */
 900
 901 static int mncc_q_enqueue(struct lcr_gsm *lcr_gsm, struct gsm_mncc *mncc, unsigned int len)
 902 {
 903         struct mncc_q_entry *qe;
 904
 905         qe = (struct mncc_q_entry *) MALLOC(sizeof(*qe)+sizeof(*mncc)+len);
 906         if (!qe)
 907                 return -ENOMEM;
 908
 909         qe->next = NULL;
 910         qe->len = len;
 911         memcpy(qe->data, mncc, len);
 912
 913         /* in case of empty list ... */
 914         if (!lcr_gsm->mncc_q_hd && !lcr_gsm->mncc_q_tail) {
 915                 /* the list head and tail both point to the new qe */
 916                 lcr_gsm->mncc_q_hd = lcr_gsm->mncc_q_tail = qe;
 917         } else {
 918                 /* append to tail of list */
 919                 lcr_gsm->mncc_q_tail->next = qe;
 920                 lcr_gsm->mncc_q_tail = qe;
 921         }
 922
 923         lcr_gsm->mncc_lfd.when |= LCR_FD_WRITE;
 924
 925         return 0;
 926 }
 927
 928 static struct mncc_q_entry *mncc_q_dequeue(struct lcr_gsm *lcr_gsm)
 929 {
 930         struct mncc_q_entry *qe = lcr_gsm->mncc_q_hd;
 931         if (!qe)
 932                 return NULL;
 933
 934         /* dequeue the successfully sent message */
 935         lcr_gsm->mncc_q_hd = qe->next;
 936         if (!qe)
 937                 return NULL;
 938         if (qe == lcr_gsm->mncc_q_tail)
 939                 lcr_gsm->mncc_q_tail = NULL;
 940
 941         return qe;
 942 }
 943
 944 /* routine called by LCR code if it wants to send a message to OpenBSC */
 945 static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data)
 946 {
 947         int len = 0;
 948
 949         /* FIXME: the caller should provide this */
 950         switch (msg_type) {
 951         case GSM_TCHF_FRAME:
 952                 len = sizeof(struct gsm_data_frame) + 33;
 953                 break;
 954         default:
 955                 len = sizeof(struct gsm_mncc);
 956                 break;
 957         }
 958
 959         return mncc_q_enqueue(lcr_gsm, (struct gsm_mncc *)data, len);
 960 }
 961
 962 /* close MNCC socket */
 963 static int mncc_fd_close(struct lcr_gsm *lcr_gsm, struct lcr_fd *lfd)
 964 {
 965         class Port *port;
 966         class Pgsm *pgsm = NULL;
 967         struct lcr_msg *message;
 968
 969         PERROR("Lost MNCC socket, retrying in %u seconds\n", SOCKET_RETRY_TIMER);
 970         close(lfd->fd);
 971         unregister_fd(lfd);
 972         lfd->fd = -1;
 973
 974         /* free all the calls that were running through the MNCC interface */
 975         port = port_first;
 976         while(port) {
 977                 if ((port->p_type & PORT_CLASS_mISDN_MASK) == PORT_CLASS_GSM) {
 978                         pgsm = (class Pgsm *)port;
 979                         if (pgsm->p_g_lcr_gsm == lcr_gsm) {
 980                                 message = message_create(pgsm->p_serial, ACTIVE_EPOINT(pgsm->p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
 981                                 message->param.disconnectinfo.cause = 27; // temp. unavail.
 982                                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 983                                 message_put(message);
 984                                 pgsm->new_state(PORT_STATE_RELEASE);
 985                                 trigger_work(&pgsm->p_g_delete);
 986                         }
 987                 }
 988                 port = port->next;
 989         }
 990
 991         /* flush the queue */
 992         while (mncc_q_dequeue(lcr_gsm))
 993                 ;
 994
 995         /* start the re-connect timer */
 996         schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
 997
 998         return 0;
 999 }
1000
1001 /* write to OpenBSC via MNCC socket */
1002 static int mncc_fd_write(struct lcr_fd *lfd, void *inst, int idx)
1003 {
1004         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1005         struct mncc_q_entry *qe, *qe2;
1006         int rc;
1007
1008         while (1) {
1009                 qe = lcr_gsm->mncc_q_hd;
1010                 if (!qe) {
1011                         lfd->when &= ~LCR_FD_WRITE;
1012                         break;
1013                 }
1014                 rc = write(lfd->fd, qe->data, qe->len);
1015                 if (rc == 0)
1016                         return mncc_fd_close(lcr_gsm, lfd);
1017                 if (rc < 0)
1018                         return rc;
1019                 if (rc < (int)qe->len)
1020                         return -1;
1021                 /* dequeue the successfully sent message */
1022                 qe2 = mncc_q_dequeue(lcr_gsm);
1023                 assert(qe == qe2);
1024                 free(qe);
1025         }
1026         return 0;
1027 }
1028
1029 /* read from OpenBSC via MNCC socket */
1030 static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
1031 {
1032         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1033         int rc;
1034         static char buf[sizeof(struct gsm_mncc)+1024];
1035         struct gsm_mncc *mncc_prim = (struct gsm_mncc *) buf;
1036
1037         memset(buf, 0, sizeof(buf));
1038         rc = recv(lfd->fd, buf, sizeof(buf), 0);
1039         if (rc == 0)
1040                 return mncc_fd_close(lcr_gsm, lfd);
1041         if (rc < 0)
1042                 return rc;
1043
1044         /* Hand the MNCC message into LCR */
1045         switch (lcr_gsm->type) {
1046 #ifdef WITH_GSM_BS
1047         case LCR_GSM_TYPE_NETWORK:
1048                 return message_bsc(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1049 #endif
1050 #ifdef WITH_GSM_MS
1051         case LCR_GSM_TYPE_MS:
1052                 return message_ms(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1053 #endif
1054         default:
1055                 return 0;
1056         }
1057 }
1058
1059 /* file descriptor callback if we can read or write form MNCC socket */
1060 static int mncc_fd_cb(struct lcr_fd *lfd, unsigned int what, void *inst, int idx)
1061 {
1062         int rc = 0;
1063
1064         if (what & LCR_FD_READ)
1065                 rc = mncc_fd_read(lfd, inst, idx);
1066         if (rc < 0)
1067                 return rc;
1068
1069         if (what & LCR_FD_WRITE)
1070                 rc = mncc_fd_write(lfd, inst, idx);
1071
1072         return rc;
1073 }
1074
1075 int mncc_socket_retry_cb(struct lcr_timer *timer, void *inst, int index)
1076 {
1077         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1078         int fd, rc;
1079
1080         lcr_gsm->mncc_lfd.fd = -1;
1081
1082         fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
1083         if (fd < 0) {
1084                 PERROR("Cannot create SEQPACKET socket, giving up!\n");
1085                 return fd;
1086         }
1087
1088         rc = connect(fd, (struct sockaddr *) &lcr_gsm->sun,
1089                      sizeof(lcr_gsm->sun));
1090         if (rc < 0) {
1091                 PERROR("Could not connect to MNCC socket %s, "
1092                         "retrying in %u seconds\n", lcr_gsm->sun.sun_path,
1093                         SOCKET_RETRY_TIMER);
1094                 close(fd);
1095                 schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1096         } else {
1097                 PDEBUG(DEBUG_GSM, "Connected to MNCC socket %s!\n", lcr_gsm->sun.sun_path);
1098                 lcr_gsm->mncc_lfd.fd = fd;
1099                 register_fd(&lcr_gsm->mncc_lfd, LCR_FD_READ, &mncc_fd_cb, lcr_gsm, 0);
1100         }
1101
1102         return 0;
1103 }
1104