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         { MNCC_LCHAN_MODIFY,    "MNCC_LCHAN_MODIFY" },
  86         { 0,                    NULL }
  87 };
  88
  89 const char *mncc_name(int value)
  90 {
  91         int i = 0;
  92
  93         while (mncc_names[i].name) {
  94                 if (mncc_names[i].msg_type == value)
  95                         return mncc_names[i].name;
  96                 i++;
  97         }
  98         return "unknown";
  99 }
 100
 101 static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data);
 102
 103 /*
 104  * create and send mncc message
 105  */
 106 struct gsm_mncc *create_mncc(int msg_type, unsigned int callref)
 107 {
 108         struct gsm_mncc *mncc;
 109
 110         mncc = (struct gsm_mncc *)MALLOC(sizeof(struct gsm_mncc));
 111         mncc->msg_type = msg_type;
 112         mncc->callref = callref;
 113         return (mncc);
 114 }
 115 int send_and_free_mncc(struct lcr_gsm *lcr_gsm, unsigned int msg_type, void *data)
 116 {
 117         int ret = 0;
 118
 119         if (lcr_gsm) {
 120                 ret = mncc_send(lcr_gsm, msg_type, data);
 121         }
 122         free(data);
 123
 124         return ret;
 125 }
 126
 127 void Pgsm::send_mncc_rtp_connect(void)
 128 {
 129         struct gsm_mncc_rtp *nrtp;
 130
 131         nrtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CONNECT, p_g_callref);
 132         nrtp->ip = p_g_rtp_ip_remote;
 133         nrtp->port = p_g_rtp_port_remote;
 134         switch (p_g_media_type) {
 135         case MEDIA_TYPE_GSM:
 136                 nrtp->payload_msg_type = GSM_TCHF_FRAME;
 137                 break;
 138         case MEDIA_TYPE_GSM_EFR:
 139                 nrtp->payload_msg_type = GSM_TCHF_FRAME_EFR;
 140                 break;
 141         case MEDIA_TYPE_AMR:
 142                 nrtp->payload_msg_type = GSM_TCH_FRAME_AMR;
 143                 break;
 144         case MEDIA_TYPE_GSM_HR:
 145                 nrtp->payload_msg_type = GSM_TCHH_FRAME;
 146                 break;
 147         }
 148         nrtp->payload_type = p_g_payload_type;
 149         PDEBUG(DEBUG_GSM, "sending MNCC RTP connect with payload_msg_type=%x, payload_type=%d\n", nrtp->payload_msg_type, nrtp->payload_type);
 150         send_and_free_mncc(p_g_lcr_gsm, nrtp->msg_type, nrtp);
 151 }
 152
 153 static int delete_event(struct lcr_work *work, void *instance, int index);
 154
 155 /*
 156  * constructor
 157  */
 158 Pgsm::Pgsm(int type, char *portname, struct port_settings *settings, struct interface *interface) : Port(type, portname, settings, interface)
 159 {
 160         p_g_tones = 0;
 161         if (interface->is_tones == IS_YES)
 162                 p_g_tones = 1;
 163         p_g_earlyb = 0;
 164         if (interface->is_earlyb == IS_YES)
 165                 p_g_earlyb = 1;
 166         p_g_rtp_bridge = 0;
 167         if (interface->rtp_bridge)
 168                 p_g_rtp_bridge = 1;
 169         p_g_rtp_payloads = 0;
 170         memset(&p_g_samples, 0, sizeof(p_g_samples));
 171         p_callerinfo.itype = (interface->extension)?INFO_ITYPE_ISDN_EXTENSION:INFO_ITYPE_ISDN;
 172         memset(&p_g_delete, 0, sizeof(p_g_delete));
 173         add_work(&p_g_delete, delete_event, this, 0);
 174         p_g_lcr_gsm = NULL;
 175         p_g_callref = 0;
 176         p_g_mode = 0;
 177         p_g_gsm_b_sock = -1;
 178         p_g_gsm_b_index = -1;
 179         p_g_gsm_b_active = 0;
 180         p_g_notify_pending = NULL;
 181         p_g_setup_pending = NULL;
 182         p_g_connect_pending = NULL;
 183         p_g_decoder = gsm_audio_create();
 184         p_g_encoder = gsm_audio_create();
 185         if (!p_g_encoder || !p_g_decoder) {
 186                 PERROR("Failed to create GSM audio codec instance\n");
 187                 trigger_work(&p_g_delete);
 188         }
 189         p_g_rxpos = 0;
 190         p_g_tch_connected = 0;
 191         p_g_media_type = 0;
 192
 193         PDEBUG(DEBUG_GSM, "Created new GSMPort(%s).\n", portname);
 194 }
 195
 196 /*
 197  * destructor
 198  */
 199 Pgsm::~Pgsm()
 200 {
 201         PDEBUG(DEBUG_GSM, "Destroyed GSM process(%s).\n", p_name);
 202
 203         del_work(&p_g_delete);
 204
 205         /* remove queued message */
 206         if (p_g_notify_pending)
 207                 message_free(p_g_notify_pending);
 208         if (p_g_setup_pending)
 209                 message_free(p_g_setup_pending);
 210         if (p_g_connect_pending)
 211                 message_free(p_g_connect_pending);
 212
 213         /* close codec */
 214         if (p_g_encoder)
 215                 gsm_audio_destroy(p_g_encoder);
 216         if (p_g_decoder)
 217                 gsm_audio_destroy(p_g_decoder);
 218 }
 219
 220
 221 /* receive encoded frame from gsm */
 222 void Pgsm::frame_receive(void *arg)
 223 {
 224         struct gsm_data_frame *frame = (struct gsm_data_frame *)arg;
 225         unsigned char data[160];
 226         int i;
 227
 228         if (!p_g_decoder)
 229                 return;
 230
 231         if (frame->msg_type != GSM_BAD_FRAME) {
 232                 if ((frame->data[0]>>4) != 0xd)
 233                         PERROR("received GSM frame with wrong magig 0x%x\n", frame->data[0]>>4);
 234
 235                 /* decode */
 236                 gsm_audio_decode(p_g_decoder, frame->data, p_g_samples);
 237                 for (i = 0; i < 160; i++) {
 238                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 239                 }
 240         } else if (p_echotest) {
 241                 /* beep on bad frame */
 242                 for (i = 0; i < 160; i++) {
 243                         if ((i & 3) > 2)
 244                                 p_g_samples[i] = 15000;
 245                         else
 246                                 p_g_samples[i] = -15000;
 247                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 248                 }
 249         } else {
 250                 /* repeat on bad frame */
 251                 for (i = 0; i < 160; i++) {
 252                         p_g_samples[i] = (p_g_samples[i] * 14) >> 4;
 253                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 254                 }
 255         }
 256
 257         /* local echo */
 258         if (p_echotest)
 259                 bridge_rx(data, 160);
 260
 261         /* send to remote*/
 262         bridge_tx(data, 160);
 263 }
 264
 265 /* send traffic to gsm */
 266 int Pgsm::bridge_rx(unsigned char *data, int len)
 267 {
 268         if (p_tone_name[0])
 269                 return -EINVAL;
 270
 271         return audio_send(data, len);
 272 }
 273
 274 int Pgsm::audio_send(unsigned char *data, int len)
 275 {
 276         unsigned char frame[33];
 277
 278         /* encoder init failed */
 279         if (!p_g_encoder)
 280                 return -EINVAL;
 281
 282         /* (currently) not connected, so don't flood tch! */
 283         if (!p_g_tch_connected)
 284                 return -EINVAL;
 285
 286         /* write to rx buffer */
 287         while(len--) {
 288                 p_g_rxdata[p_g_rxpos++] = audio_law_to_s32[*data++];
 289                 if (p_g_rxpos == 160) {
 290                         p_g_rxpos = 0;
 291
 292                         /* encode data */
 293                         gsm_audio_encode(p_g_encoder, p_g_rxdata, frame);
 294                         frame_send(frame);
 295                 }
 296         }
 297
 298         return 0;
 299 }
 300
 301 void Pgsm::frame_send(void *_frame)
 302 {
 303         unsigned char buffer[sizeof(struct gsm_data_frame) + 33];
 304         struct gsm_data_frame *frame = (struct gsm_data_frame *)buffer;
 305
 306         frame->msg_type = GSM_TCHF_FRAME;
 307         frame->callref = p_g_callref;
 308         memcpy(frame->data, _frame, 33);
 309
 310         if (p_g_lcr_gsm) {
 311                 mncc_send(p_g_lcr_gsm, frame->msg_type, frame);
 312         }
 313 }
 314
 315 /*
 316  * create trace
 317  */
 318 void gsm_trace_header(const char *interface_name, class Pgsm *port, unsigned int msg_type, int direction)
 319 {
 320         char msgtext[64];
 321         struct interface *interface = interface_first;
 322
 323         interface = getinterfacebyname(interface_name);
 324         if (!interface)
 325                 return;
 326
 327         /* select message and primitive text */
 328         SCPY(msgtext, mncc_name(msg_type));
 329
 330         /* add direction */
 331         if (port) {
 332                 switch(port->p_type) {
 333                 case PORT_TYPE_GSM_BS_OUT:
 334                 case PORT_TYPE_GSM_BS_IN:
 335                         SCAT(msgtext, " LCR<->BSC");
 336                         break;
 337                 case PORT_TYPE_GSM_MS_OUT:
 338                 case PORT_TYPE_GSM_MS_IN:
 339                         SCAT(msgtext, " LCR<->MS");
 340                         break;
 341                 }
 342         } else
 343                 SCAT(msgtext, " ----");
 344
 345         /* init trace with given values */
 346         start_trace(-1,
 347                     interface,
 348                     port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
 349                     port?port->p_dialinginfo.id:NULL,
 350                     direction,
 351                     CATEGORY_CH,
 352                     port?port->p_serial:0,
 353                     msgtext);
 354 }
 355
 356 /* modify lchan to given payload type */
 357 void Pgsm::modify_lchan(int media_type)
 358 {
 359         struct gsm_mncc *mode;
 360
 361         /* already modified to that payload type */
 362         if (p_g_media_type == media_type)
 363                 return;
 364
 365         p_g_media_type = media_type;
 366         gsm_trace_header(p_interface_name, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
 367         mode = create_mncc(MNCC_LCHAN_MODIFY, p_g_callref);
 368         switch (media_type) {
 369         case MEDIA_TYPE_GSM_EFR:
 370                 add_trace("speech", "version", "EFR given");
 371                 mode->lchan_mode = 0x21; /* GSM V2 */
 372                 break;
 373         case MEDIA_TYPE_AMR:
 374                 add_trace("speech", "version", "AMR given");
 375                 mode->lchan_mode = 0x41; /* GSM V3 */
 376                 break;
 377         default:
 378                 add_trace("speech", "version", "Full/Half Rate given");
 379                 mode->lchan_mode = 0x01; /* GSM V1 */
 380         }
 381         mode->lchan_type = 0x02; /* FIXME: unused */
 382         add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
 383         end_trace();
 384         send_and_free_mncc(p_g_lcr_gsm, mode->msg_type, mode);
 385 }
 386
 387 /* CALL PROCEEDING INDICATION (from network) */
 388 void Pgsm::call_proc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 389 {
 390         struct lcr_msg *message;
 391         struct gsm_mncc *frame;
 392
 393         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 394         end_trace();
 395
 396         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
 397         message_put(message);
 398
 399         new_state(PORT_STATE_OUT_PROCEEDING);
 400
 401         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 402                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 403                 end_trace();
 404                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 405                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 406                 p_g_tch_connected = 1;
 407         }
 408 }
 409
 410 /* ALERTING INDICATION */
 411 void Pgsm::alert_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 412 {
 413         struct lcr_msg *message;
 414         struct gsm_mncc *frame;
 415
 416         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 417         end_trace();
 418
 419         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_ALERTING);
 420         message_put(message);
 421
 422         new_state(PORT_STATE_OUT_ALERTING);
 423
 424         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 425                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 426                 end_trace();
 427                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 428                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 429                 p_g_tch_connected = 1;
 430         }
 431 }
 432
 433 /* CONNECT INDICATION */
 434 void Pgsm::setup_cnf(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 435 {
 436         struct gsm_mncc *resp, *frame;
 437         struct lcr_msg *message;
 438
 439         SCPY(p_connectinfo.id, mncc->connected.number);
 440         SCPY(p_connectinfo.imsi, mncc->imsi);
 441         p_connectinfo.present = INFO_PRESENT_ALLOWED;
 442         p_connectinfo.screen = INFO_SCREEN_NETWORK;
 443         p_connectinfo.ntype = INFO_NTYPE_UNKNOWN;
 444         SCPY(p_connectinfo.interface, p_interface_name);
 445
 446         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 447         if (p_connectinfo.id[0])
 448                 add_trace("connect", "number", "%s", p_connectinfo.id);
 449         else if (mncc->imsi[0])
 450                 SPRINT(p_connectinfo.id, "imsi-%s", p_connectinfo.imsi);
 451         if (mncc->imsi[0])
 452                 add_trace("connect", "imsi", "%s", p_connectinfo.imsi);
 453         end_trace();
 454
 455         /* send resp */
 456         gsm_trace_header(p_interface_name, this, MNCC_SETUP_COMPL_REQ, DIRECTION_OUT);
 457         resp = create_mncc(MNCC_SETUP_COMPL_REQ, p_g_callref);
 458         end_trace();
 459         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 460
 461         new_state(PORT_STATE_CONNECT);
 462
 463         if (!p_g_tch_connected) { /* only if ... */
 464                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 465                 end_trace();
 466                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 467                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 468                 p_g_tch_connected = 1;
 469         }
 470
 471         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
 472         memcpy(&message->param.connectinfo, &p_connectinfo, sizeof(struct connect_info));
 473
 474         /* if we have a bridge, but not yet modified, the phone accepts out requested payload.
 475          * we force the first in list */
 476         if (p_g_rtp_bridge) {
 477                 if (!p_g_media_type) {
 478                         /* modify to first given type */
 479                         modify_lchan(p_g_rtp_media_types[0]);
 480                         /* also set payload type */
 481                         p_g_payload_type = p_g_rtp_payload_types[0];
 482                 }
 483                 message->param.connectinfo.rtpinfo.media_types[0] = p_g_media_type;
 484                 message->param.connectinfo.rtpinfo.payload_types[0] = p_g_payload_type;
 485                 message->param.connectinfo.rtpinfo.payloads = 1;
 486         }
 487
 488         if (p_g_rtp_bridge) {
 489                 struct gsm_mncc_rtp *rtp;
 490
 491                 PDEBUG(DEBUG_GSM, "Request RTP peer info, before forwarding connect msg\n");
 492                 p_g_connect_pending = message;
 493                 rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CREATE, p_g_callref);
 494                 send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
 495         } else
 496                 message_put(message);
 497 }
 498
 499 /* CONNECT ACK INDICATION */
 500 void Pgsm::setup_compl_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 501 {
 502         struct gsm_mncc *frame;
 503
 504         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 505         end_trace();
 506
 507         new_state(PORT_STATE_CONNECT);
 508
 509         if (!p_g_tch_connected) { /* only if ... */
 510                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 511                 end_trace();
 512                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 513                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 514                 p_g_tch_connected = 1;
 515         }
 516 }
 517
 518 /* DISCONNECT INDICATION */
 519 void Pgsm::disc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 520 {
 521         struct lcr_msg *message;
 522         int cause = 16, location = 0;
 523         struct gsm_mncc *resp;
 524
 525         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 526         if (mncc->fields & MNCC_F_CAUSE) {
 527                 location = mncc->cause.location;
 528                 cause = mncc->cause.value;
 529                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 530                 add_trace("cause", "location", "%d", location);
 531                 add_trace("cause", "value", "%d", cause);
 532         }
 533         end_trace();
 534
 535         /* send release */
 536         resp = create_mncc(MNCC_REL_REQ, p_g_callref);
 537         gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
 538 #if 0
 539         resp->fields |= MNCC_F_CAUSE;
 540         resp->cause.coding = 3;
 541         resp->cause.location = 1;
 542         resp->cause.value = cause;
 543         add_trace("cause", "coding", "%d", resp->cause.coding);
 544         add_trace("cause", "location", "%d", resp->cause.location);
 545         add_trace("cause", "value", "%d", resp->cause.value);
 546 #endif
 547         end_trace();
 548         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 549
 550         /* sending release to endpoint */
 551         while(p_epointlist) {
 552                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 553                 message->param.disconnectinfo.cause = cause;
 554                 message->param.disconnectinfo.location = location;
 555                 message_put(message);
 556                 /* remove epoint */
 557                 free_epointlist(p_epointlist);
 558         }
 559         new_state(PORT_STATE_RELEASE);
 560         trigger_work(&p_g_delete);
 561 }
 562
 563 /* CC_RELEASE INDICATION */
 564 void Pgsm::rel_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 565 {
 566         int location = 0, cause = 16;
 567         struct lcr_msg *message;
 568
 569         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 570         if (mncc->fields & MNCC_F_CAUSE) {
 571                 location = mncc->cause.location;
 572                 cause = mncc->cause.value;
 573                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 574                 add_trace("cause", "location", "%d", mncc->cause.location);
 575                 add_trace("cause", "value", "%d", mncc->cause.value);
 576         }
 577         end_trace();
 578
 579         /* sending release to endpoint */
 580         while(p_epointlist) {
 581                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 582                 message->param.disconnectinfo.cause = cause;
 583                 message->param.disconnectinfo.location = location;
 584                 message_put(message);
 585                 /* remove epoint */
 586                 free_epointlist(p_epointlist);
 587         }
 588         new_state(PORT_STATE_RELEASE);
 589         trigger_work(&p_g_delete);
 590 }
 591
 592 /* NOTIFY INDICATION */
 593 void Pgsm::notify_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 594 {
 595         struct lcr_msg *message;
 596
 597         gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
 598         add_trace("notify", NULL, "%d", mncc->notify);
 599         end_trace();
 600
 601         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 602         message->param.notifyinfo.notify = mncc->notify;
 603         message_put(message);
 604 }
 605
 606 /* MESSAGE_NOTIFY */
 607 void Pgsm::message_notify(unsigned int epoint_id, int message_id, union parameter *param)
 608 {
 609         struct gsm_mncc *mncc;
 610         int notify;
 611
 612 //      printf("if = %d\n", param->notifyinfo.notify);
 613         if (param->notifyinfo.notify>INFO_NOTIFY_NONE) {
 614                 notify = param->notifyinfo.notify & 0x7f;
 615                 if (p_state!=PORT_STATE_CONNECT /*&& p_state!=PORT_STATE_IN_PROCEEDING*/ && p_state!=PORT_STATE_IN_ALERTING) {
 616                         /* queue notification */
 617                         if (p_g_notify_pending)
 618                                 message_free(p_g_notify_pending);
 619                         p_g_notify_pending = message_create(ACTIVE_EPOINT(p_epointlist), p_serial, EPOINT_TO_PORT, message_id);
 620                         memcpy(&p_g_notify_pending->param, param, sizeof(union parameter));
 621                 } else {
 622                         /* sending notification */
 623                         gsm_trace_header(p_interface_name, this, MNCC_NOTIFY_REQ, DIRECTION_OUT);
 624                         add_trace("notify", NULL, "%d", notify);
 625                         end_trace();
 626                         mncc = create_mncc(MNCC_NOTIFY_REQ, p_g_callref);
 627                         mncc->notify = notify;
 628                         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 629                 }
 630         }
 631 }
 632
 633 /* RTP create indication */
 634 void Pgsm::rtp_create_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 635 {
 636         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 637
 638         /* send queued setup, as we received remote RTP info */
 639         if (p_g_setup_pending) {
 640                 struct lcr_msg *message;
 641
 642                 message = p_g_setup_pending;
 643                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding setup\n", rtp->ip, rtp->port);
 644                 message->param.setup.rtpinfo.ip = rtp->ip;
 645                 message->param.setup.rtpinfo.port = rtp->port;
 646                 message_put(message);
 647                 p_g_setup_pending = NULL;
 648         }
 649         if (p_g_connect_pending) {
 650                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) connecting RTP... \n", rtp->ip, rtp->port);
 651                 send_mncc_rtp_connect();
 652         }
 653 }
 654
 655 /* RTP connect indication */
 656 void Pgsm::rtp_connect_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 657 {
 658         struct lcr_msg *message;
 659         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 660
 661         if (p_g_connect_pending) {
 662                 message = p_g_connect_pending;
 663                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding connect\n", rtp->ip, rtp->port);
 664                 message->param.connectinfo.rtpinfo.ip = rtp->ip;
 665                 message->param.connectinfo.rtpinfo.port = rtp->port;
 666                 message_put(message);
 667                 p_g_connect_pending = NULL;
 668         }
 669 }
 670
 671 /* MESSAGE_PROGRESS */
 672 void Pgsm::message_progress(unsigned int epoint_id, int message_id, union parameter *param)
 673 {
 674         if (param->progressinfo.progress == 8) {
 675                 PDEBUG(DEBUG_GSM, "Remote provides tones for us\n");
 676                 p_g_tones = 1;
 677         }
 678
 679         if (param->progressinfo.rtpinfo.port) {
 680                 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]);
 681
 682                 /* modify channel to givne type, also sets media type */
 683                 modify_lchan(param->progressinfo.rtpinfo.media_types[0]);
 684
 685                 /* connect RTP */
 686                 p_g_rtp_ip_remote = param->progressinfo.rtpinfo.ip;
 687                 p_g_rtp_port_remote = param->progressinfo.rtpinfo.port;
 688                 /* p_g_media_type is already set by modify_lchan() */
 689                 p_g_payload_type = param->progressinfo.rtpinfo.payload_types[0];
 690                 send_mncc_rtp_connect();
 691         }
 692 }
 693
 694 /* MESSAGE_ALERTING */
 695 void Pgsm::message_alerting(unsigned int epoint_id, int message_id, union parameter *param)
 696 {
 697         struct gsm_mncc *mncc;
 698
 699         /* send alert */
 700         gsm_trace_header(p_interface_name, this, MNCC_ALERT_REQ, DIRECTION_OUT);
 701         mncc = create_mncc(MNCC_ALERT_REQ, p_g_callref);
 702         if (p_g_tones) {
 703                 mncc->fields |= MNCC_F_PROGRESS;
 704                 mncc->progress.coding = 3; /* GSM */
 705                 mncc->progress.location = 1;
 706                 mncc->progress.descr = 8;
 707                 add_trace("progress", "coding", "%d", mncc->progress.coding);
 708                 add_trace("progress", "location", "%d", mncc->progress.location);
 709                 add_trace("progress", "descr", "%d", mncc->progress.descr);
 710         }
 711         end_trace();
 712         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 713
 714         new_state(PORT_STATE_IN_ALERTING);
 715
 716         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
 717                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 718                 end_trace();
 719                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 720                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 721                 p_g_tch_connected = 1;
 722         }
 723 }
 724
 725 /* MESSAGE_CONNECT */
 726 void Pgsm::message_connect(unsigned int epoint_id, int message_id, union parameter *param)
 727 {
 728         struct gsm_mncc *mncc;
 729
 730         /* copy connected information */
 731         memcpy(&p_connectinfo, &param->connectinfo, sizeof(p_connectinfo));
 732         /* screen outgoing caller id */
 733         do_screen(1, p_connectinfo.id, sizeof(p_connectinfo.id), &p_connectinfo.ntype, &p_connectinfo.present, p_interface_name);
 734
 735         /* send connect */
 736         mncc = create_mncc(MNCC_SETUP_RSP, p_g_callref);
 737         gsm_trace_header(p_interface_name, this, MNCC_SETUP_RSP, DIRECTION_OUT);
 738         /* caller information */
 739         mncc->fields |= MNCC_F_CONNECTED;
 740         mncc->connected.plan = 1;
 741         switch (p_callerinfo.ntype) {
 742                 case INFO_NTYPE_UNKNOWN:
 743                 mncc->connected.type = 0x0;
 744                 break;
 745                 case INFO_NTYPE_INTERNATIONAL:
 746                 mncc->connected.type = 0x1;
 747                 break;
 748                 case INFO_NTYPE_NATIONAL:
 749                 mncc->connected.type = 0x2;
 750                 break;
 751                 case INFO_NTYPE_SUBSCRIBER:
 752                 mncc->connected.type = 0x4;
 753                 break;
 754                 default: /* INFO_NTYPE_NOTPRESENT */
 755                 mncc->fields &= ~MNCC_F_CONNECTED;
 756                 break;
 757         }
 758         switch (p_callerinfo.screen) {
 759                 case INFO_SCREEN_USER:
 760                 mncc->connected.screen = 0;
 761                 break;
 762                 default: /* INFO_SCREEN_NETWORK */
 763                 mncc->connected.screen = 3;
 764                 break;
 765         }
 766         switch (p_callerinfo.present) {
 767                 case INFO_PRESENT_ALLOWED:
 768                 mncc->connected.present = 0;
 769                 break;
 770                 case INFO_PRESENT_RESTRICTED:
 771                 mncc->connected.present = 1;
 772                 break;
 773                 default: /* INFO_PRESENT_NOTAVAIL */
 774                 mncc->connected.present = 2;
 775                 break;
 776         }
 777         if (mncc->fields & MNCC_F_CONNECTED) {
 778                 SCPY(mncc->connected.number, p_connectinfo.id);
 779                 add_trace("connected", "type", "%d", mncc->connected.type);
 780                 add_trace("connected", "plan", "%d", mncc->connected.plan);
 781                 add_trace("connected", "present", "%d", mncc->connected.present);
 782                 add_trace("connected", "screen", "%d", mncc->connected.screen);
 783                 add_trace("connected", "number", "%s", mncc->connected.number);
 784         }
 785         end_trace();
 786         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 787
 788         new_state(PORT_STATE_CONNECT_WAITING);
 789
 790         if (param->connectinfo.rtpinfo.port) {
 791                 PDEBUG(DEBUG_GSM, "CONNECT with RTP peer info, sent to BSC (%08x,%d)\n", param->connectinfo.rtpinfo.ip, param->connectinfo.rtpinfo.port);
 792
 793                 /* modify channel to givne type, also sets media type */
 794                 modify_lchan(param->connectinfo.rtpinfo.media_types[0]);
 795
 796                 /* connect RTP */
 797                 p_g_rtp_ip_remote = param->connectinfo.rtpinfo.ip;
 798                 p_g_rtp_port_remote = param->connectinfo.rtpinfo.port;
 799                 /* p_g_media_type is already set by modify_lchan() */
 800                 p_g_payload_type = param->connectinfo.rtpinfo.payload_types[0];
 801                 send_mncc_rtp_connect();
 802         }
 803 }
 804
 805 /* MESSAGE_DISCONNECT */
 806 void Pgsm::message_disconnect(unsigned int epoint_id, int message_id, union parameter *param)
 807 {
 808         struct gsm_mncc *mncc;
 809
 810         /* send disconnect */
 811         mncc = create_mncc(MNCC_DISC_REQ, p_g_callref);
 812         gsm_trace_header(p_interface_name, this, MNCC_DISC_REQ, DIRECTION_OUT);
 813         if (p_g_tones) {
 814                 mncc->fields |= MNCC_F_PROGRESS;
 815                 mncc->progress.coding = 3; /* GSM */
 816                 mncc->progress.location = 1;
 817                 mncc->progress.descr = 8;
 818                 add_trace("progress", "coding", "%d", mncc->progress.coding);
 819                 add_trace("progress", "location", "%d", mncc->progress.location);
 820                 add_trace("progress", "descr", "%d", mncc->progress.descr);
 821         }
 822         mncc->fields |= MNCC_F_CAUSE;
 823         mncc->cause.coding = 3;
 824         mncc->cause.location = param->disconnectinfo.location;
 825         mncc->cause.value = param->disconnectinfo.cause;
 826         add_trace("cause", "coding", "%d", mncc->cause.coding);
 827         add_trace("cause", "location", "%d", mncc->cause.location);
 828         add_trace("cause", "value", "%d", mncc->cause.value);
 829         end_trace();
 830         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 831
 832         new_state(PORT_STATE_OUT_DISCONNECT);
 833
 834         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
 835                 gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 836                 end_trace();
 837                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 838                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 839                 p_g_tch_connected = 1;
 840         }
 841 }
 842
 843
 844 /* MESSAGE_RELEASE */
 845 void Pgsm::message_release(unsigned int epoint_id, int message_id, union parameter *param)
 846 {
 847         struct gsm_mncc *mncc;
 848
 849         /* send release */
 850         mncc = create_mncc(MNCC_REL_REQ, p_g_callref);
 851         gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
 852         mncc->fields |= MNCC_F_CAUSE;
 853         mncc->cause.coding = 3;
 854         mncc->cause.location = param->disconnectinfo.location;
 855         mncc->cause.value = param->disconnectinfo.cause;
 856         add_trace("cause", "coding", "%d", mncc->cause.coding);
 857         add_trace("cause", "location", "%d", mncc->cause.location);
 858         add_trace("cause", "value", "%d", mncc->cause.value);
 859         end_trace();
 860         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 861
 862         new_state(PORT_STATE_RELEASE);
 863         trigger_work(&p_g_delete);
 864         return;
 865 }
 866
 867 /*
 868  * endpoint sends messages to the port
 869  */
 870 int Pgsm::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
 871 {
 872         int ret = 0;
 873
 874         if (Port::message_epoint(epoint_id, message_id, param))
 875                 return 1;
 876
 877         switch(message_id) {
 878                 case MESSAGE_NOTIFY: /* display and notifications */
 879                 ret = 1;
 880                 message_notify(epoint_id, message_id, param);
 881                 break;
 882
 883 //              case MESSAGE_FACILITY: /* facility message */
 884 //              message_facility(epoint_id, message_id, param);
 885 //              break;
 886
 887                 case MESSAGE_PROCEEDING: /* message not handles */
 888                 ret = 1;
 889                 break;
 890
 891                 case MESSAGE_PROGRESS:
 892                 ret = 1;
 893                 message_progress(epoint_id, message_id, param);
 894                 break;
 895
 896                 case MESSAGE_ALERTING: /* call of endpoint is ringing */
 897                 ret = 1;
 898                 if (p_state!=PORT_STATE_IN_PROCEEDING)
 899                         break;
 900                 message_alerting(epoint_id, message_id, param);
 901                 if (p_g_notify_pending) {
 902                         /* send pending notify message during connect */
 903                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
 904                         message_free(p_g_notify_pending);
 905                         p_g_notify_pending = NULL;
 906                 }
 907                 break;
 908
 909                 case MESSAGE_CONNECT: /* call of endpoint is connected */
 910                 ret = 1;
 911                 if (p_state!=PORT_STATE_IN_PROCEEDING
 912                  && p_state!=PORT_STATE_IN_ALERTING)
 913                         break;
 914                 message_connect(epoint_id, message_id, param);
 915                 if (p_g_notify_pending) {
 916                         /* send pending notify message during connect */
 917                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
 918                         message_free(p_g_notify_pending);
 919                         p_g_notify_pending = NULL;
 920                 }
 921                 break;
 922
 923                 case MESSAGE_DISCONNECT: /* call has been disconnected */
 924                 ret = 1;
 925                 if (p_state!=PORT_STATE_IN_PROCEEDING
 926                  && p_state!=PORT_STATE_IN_ALERTING
 927                  && p_state!=PORT_STATE_OUT_SETUP
 928                  && p_state!=PORT_STATE_OUT_OVERLAP
 929                  && p_state!=PORT_STATE_OUT_PROCEEDING
 930                  && p_state!=PORT_STATE_OUT_ALERTING
 931                  && p_state!=PORT_STATE_CONNECT
 932                  && p_state!=PORT_STATE_CONNECT_WAITING)
 933                         break;
 934                 message_disconnect(epoint_id, message_id, param);
 935                 break;
 936
 937                 case MESSAGE_RELEASE: /* release isdn port */
 938                 ret = 1;
 939                 if (p_state==PORT_STATE_RELEASE)
 940                         break;
 941                 message_release(epoint_id, message_id, param);
 942                 break;
 943
 944         }
 945
 946         return ret;
 947 }
 948
 949 /* deletes only if l3id is release, otherwhise it will be triggered then */
 950 static int delete_event(struct lcr_work *work, void *instance, int index)
 951 {
 952         class Pgsm *gsmport = (class Pgsm *)instance;
 953
 954         delete gsmport;
 955
 956         return 0;
 957 }
 958
 959 int gsm_exit(int rc)
 960 {
 961         return(rc);
 962 }
 963
 964 int gsm_init(void)
 965 {
 966         /* seed the PRNG */
 967         srand(time(NULL));
 968
 969         return 0;
 970 }
 971
 972 /*
 973  * MNCC interface
 974  */
 975
 976 static int mncc_q_enqueue(struct lcr_gsm *lcr_gsm, struct gsm_mncc *mncc, unsigned int len)
 977 {
 978         struct mncc_q_entry *qe;
 979
 980         qe = (struct mncc_q_entry *) MALLOC(sizeof(*qe)+sizeof(*mncc)+len);
 981         if (!qe)
 982                 return -ENOMEM;
 983
 984         qe->next = NULL;
 985         qe->len = len;
 986         memcpy(qe->data, mncc, len);
 987
 988         /* in case of empty list ... */
 989         if (!lcr_gsm->mncc_q_hd && !lcr_gsm->mncc_q_tail) {
 990                 /* the list head and tail both point to the new qe */
 991                 lcr_gsm->mncc_q_hd = lcr_gsm->mncc_q_tail = qe;
 992         } else {
 993                 /* append to tail of list */
 994                 lcr_gsm->mncc_q_tail->next = qe;
 995                 lcr_gsm->mncc_q_tail = qe;
 996         }
 997
 998         lcr_gsm->mncc_lfd.when |= LCR_FD_WRITE;
 999
1000         return 0;
1001 }
1002
1003 static struct mncc_q_entry *mncc_q_dequeue(struct lcr_gsm *lcr_gsm)
1004 {
1005         struct mncc_q_entry *qe = lcr_gsm->mncc_q_hd;
1006         if (!qe)
1007                 return NULL;
1008
1009         /* dequeue the successfully sent message */
1010         lcr_gsm->mncc_q_hd = qe->next;
1011         if (!qe)
1012                 return NULL;
1013         if (qe == lcr_gsm->mncc_q_tail)
1014                 lcr_gsm->mncc_q_tail = NULL;
1015
1016         return qe;
1017 }
1018
1019 /* routine called by LCR code if it wants to send a message to OpenBSC */
1020 static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data)
1021 {
1022         int len = 0;
1023
1024         /* FIXME: the caller should provide this */
1025         switch (msg_type) {
1026         case GSM_TCHF_FRAME:
1027                 len = sizeof(struct gsm_data_frame) + 33;
1028                 break;
1029         default:
1030                 len = sizeof(struct gsm_mncc);
1031                 break;
1032         }
1033
1034         return mncc_q_enqueue(lcr_gsm, (struct gsm_mncc *)data, len);
1035 }
1036
1037 /* close MNCC socket */
1038 static int mncc_fd_close(struct lcr_gsm *lcr_gsm, struct lcr_fd *lfd)
1039 {
1040         class Port *port;
1041         class Pgsm *pgsm = NULL;
1042         struct lcr_msg *message;
1043
1044         PERROR("Lost MNCC socket, retrying in %u seconds\n", SOCKET_RETRY_TIMER);
1045         close(lfd->fd);
1046         unregister_fd(lfd);
1047         lfd->fd = -1;
1048
1049         /* free all the calls that were running through the MNCC interface */
1050         port = port_first;
1051         while(port) {
1052                 if ((port->p_type & PORT_CLASS_mISDN_MASK) == PORT_CLASS_GSM) {
1053                         pgsm = (class Pgsm *)port;
1054                         if (pgsm->p_g_lcr_gsm == lcr_gsm) {
1055                                 message = message_create(pgsm->p_serial, ACTIVE_EPOINT(pgsm->p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
1056                                 message->param.disconnectinfo.cause = 27; // temp. unavail.
1057                                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
1058                                 message_put(message);
1059                                 pgsm->new_state(PORT_STATE_RELEASE);
1060                                 trigger_work(&pgsm->p_g_delete);
1061                         }
1062                 }
1063                 port = port->next;
1064         }
1065
1066         /* flush the queue */
1067         while (mncc_q_dequeue(lcr_gsm))
1068                 ;
1069
1070         /* start the re-connect timer */
1071         schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1072
1073         return 0;
1074 }
1075
1076 /* write to OpenBSC via MNCC socket */
1077 static int mncc_fd_write(struct lcr_fd *lfd, void *inst, int idx)
1078 {
1079         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1080         struct mncc_q_entry *qe, *qe2;
1081         int rc;
1082
1083         while (1) {
1084                 qe = lcr_gsm->mncc_q_hd;
1085                 if (!qe) {
1086                         lfd->when &= ~LCR_FD_WRITE;
1087                         break;
1088                 }
1089                 rc = write(lfd->fd, qe->data, qe->len);
1090                 if (rc == 0)
1091                         return mncc_fd_close(lcr_gsm, lfd);
1092                 if (rc < 0)
1093                         return rc;
1094                 if (rc < (int)qe->len)
1095                         return -1;
1096                 /* dequeue the successfully sent message */
1097                 qe2 = mncc_q_dequeue(lcr_gsm);
1098                 assert(qe == qe2);
1099                 free(qe);
1100         }
1101         return 0;
1102 }
1103
1104 /* read from OpenBSC via MNCC socket */
1105 static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
1106 {
1107         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1108         int rc;
1109         static char buf[sizeof(struct gsm_mncc)+1024];
1110         struct gsm_mncc *mncc_prim = (struct gsm_mncc *) buf;
1111
1112         memset(buf, 0, sizeof(buf));
1113         rc = recv(lfd->fd, buf, sizeof(buf), 0);
1114         if (rc == 0)
1115                 return mncc_fd_close(lcr_gsm, lfd);
1116         if (rc < 0)
1117                 return rc;
1118
1119         /* Hand the MNCC message into LCR */
1120         switch (lcr_gsm->type) {
1121 #ifdef WITH_GSM_BS
1122         case LCR_GSM_TYPE_NETWORK:
1123                 return message_bsc(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1124 #endif
1125 #ifdef WITH_GSM_MS
1126         case LCR_GSM_TYPE_MS:
1127                 return message_ms(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1128 #endif
1129         default:
1130                 return 0;
1131         }
1132 }
1133
1134 /* file descriptor callback if we can read or write form MNCC socket */
1135 static int mncc_fd_cb(struct lcr_fd *lfd, unsigned int what, void *inst, int idx)
1136 {
1137         int rc = 0;
1138
1139         if (what & LCR_FD_READ)
1140                 rc = mncc_fd_read(lfd, inst, idx);
1141         if (rc < 0)
1142                 return rc;
1143
1144         if (what & LCR_FD_WRITE)
1145                 rc = mncc_fd_write(lfd, inst, idx);
1146
1147         return rc;
1148 }
1149
1150 int mncc_socket_retry_cb(struct lcr_timer *timer, void *inst, int index)
1151 {
1152         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1153         int fd, rc;
1154
1155         lcr_gsm->mncc_lfd.fd = -1;
1156
1157         fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
1158         if (fd < 0) {
1159                 PERROR("Cannot create SEQPACKET socket, giving up!\n");
1160                 return fd;
1161         }
1162
1163         rc = connect(fd, (struct sockaddr *) &lcr_gsm->sun,
1164                      sizeof(lcr_gsm->sun));
1165         if (rc < 0) {
1166                 PERROR("Could not connect to MNCC socket %s, "
1167                         "retrying in %u seconds\n", lcr_gsm->sun.sun_path,
1168                         SOCKET_RETRY_TIMER);
1169                 close(fd);
1170                 schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1171         } else {
1172                 PDEBUG(DEBUG_GSM, "Connected to MNCC socket %s!\n", lcr_gsm->sun.sun_path);
1173                 lcr_gsm->mncc_lfd.fd = fd;
1174                 register_fd(&lcr_gsm->mncc_lfd, LCR_FD_READ, &mncc_fd_cb, lcr_gsm, 0);
1175         }
1176
1177         return 0;
1178 }
1179