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