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)
 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         SCPY(p_g_interface_name, interface->name);
 172         p_callerinfo.itype = (interface->extension)?INFO_ITYPE_ISDN_EXTENSION:INFO_ITYPE_ISDN;
 173         memset(&p_g_delete, 0, sizeof(p_g_delete));
 174         add_work(&p_g_delete, delete_event, this, 0);
 175         p_g_lcr_gsm = NULL;
 176         p_g_callref = 0;
 177         p_g_mode = 0;
 178         p_g_gsm_b_sock = -1;
 179         p_g_gsm_b_index = -1;
 180         p_g_gsm_b_active = 0;
 181         p_g_notify_pending = NULL;
 182         p_g_setup_pending = NULL;
 183         p_g_connect_pending = NULL;
 184         p_g_decoder = gsm_audio_create();
 185         p_g_encoder = gsm_audio_create();
 186         if (!p_g_encoder || !p_g_decoder) {
 187                 PERROR("Failed to create GSM audio codec instance\n");
 188                 trigger_work(&p_g_delete);
 189         }
 190         p_g_rxpos = 0;
 191         p_g_tch_connected = 0;
 192         p_g_media_type = 0;
 193
 194         PDEBUG(DEBUG_GSM, "Created new GSMPort(%s).\n", portname);
 195 }
 196
 197 /*
 198  * destructor
 199  */
 200 Pgsm::~Pgsm()
 201 {
 202         PDEBUG(DEBUG_GSM, "Destroyed GSM process(%s).\n", p_name);
 203
 204         del_work(&p_g_delete);
 205
 206         /* remove queued message */
 207         if (p_g_notify_pending)
 208                 message_free(p_g_notify_pending);
 209         if (p_g_setup_pending)
 210                 message_free(p_g_setup_pending);
 211         if (p_g_connect_pending)
 212                 message_free(p_g_connect_pending);
 213
 214         /* close codec */
 215         if (p_g_encoder)
 216                 gsm_audio_destroy(p_g_encoder);
 217         if (p_g_decoder)
 218                 gsm_audio_destroy(p_g_decoder);
 219 }
 220
 221
 222 /* receive encoded frame from gsm */
 223 void Pgsm::frame_receive(void *arg)
 224 {
 225         struct gsm_data_frame *frame = (struct gsm_data_frame *)arg;
 226         unsigned char data[160];
 227         int i;
 228
 229         if (!p_g_decoder)
 230                 return;
 231
 232         if (frame->msg_type != GSM_BAD_FRAME) {
 233                 if ((frame->data[0]>>4) != 0xd)
 234                         PERROR("received GSM frame with wrong magig 0x%x\n", frame->data[0]>>4);
 235
 236                 /* decode */
 237                 gsm_audio_decode(p_g_decoder, frame->data, p_g_samples);
 238                 for (i = 0; i < 160; i++) {
 239                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 240                 }
 241         } else if (p_echotest) {
 242                 /* beep on bad frame */
 243                 for (i = 0; i < 160; i++) {
 244                         if ((i & 3) > 2)
 245                                 p_g_samples[i] = 15000;
 246                         else
 247                                 p_g_samples[i] = -15000;
 248                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 249                 }
 250         } else {
 251                 /* repeat on bad frame */
 252                 for (i = 0; i < 160; i++) {
 253                         p_g_samples[i] = (p_g_samples[i] * 14) >> 4;
 254                         data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
 255                 }
 256         }
 257
 258         /* local echo */
 259         if (p_echotest)
 260                 bridge_rx(data, 160);
 261
 262         /* send to remote*/
 263         bridge_tx(data, 160);
 264 }
 265
 266 /* send traffic to gsm */
 267 int Pgsm::bridge_rx(unsigned char *data, int len)
 268 {
 269         if (p_tone_name[0])
 270                 return -EINVAL;
 271
 272         return audio_send(data, len);
 273 }
 274
 275 int Pgsm::audio_send(unsigned char *data, int len)
 276 {
 277         unsigned char frame[33];
 278
 279         /* encoder init failed */
 280         if (!p_g_encoder)
 281                 return -EINVAL;
 282
 283         /* (currently) not connected, so don't flood tch! */
 284         if (!p_g_tch_connected)
 285                 return -EINVAL;
 286
 287         /* write to rx buffer */
 288         while(len--) {
 289                 p_g_rxdata[p_g_rxpos++] = audio_law_to_s32[*data++];
 290                 if (p_g_rxpos == 160) {
 291                         p_g_rxpos = 0;
 292
 293                         /* encode data */
 294                         gsm_audio_encode(p_g_encoder, p_g_rxdata, frame);
 295                         frame_send(frame);
 296                 }
 297         }
 298
 299         return 0;
 300 }
 301
 302 void Pgsm::frame_send(void *_frame)
 303 {
 304         unsigned char buffer[sizeof(struct gsm_data_frame) + 33];
 305         struct gsm_data_frame *frame = (struct gsm_data_frame *)buffer;
 306
 307         frame->msg_type = GSM_TCHF_FRAME;
 308         frame->callref = p_g_callref;
 309         memcpy(frame->data, _frame, 33);
 310
 311         if (p_g_lcr_gsm) {
 312                 mncc_send(p_g_lcr_gsm, frame->msg_type, frame);
 313         }
 314 }
 315
 316 /*
 317  * create trace
 318  */
 319 void gsm_trace_header(const char *interface_name, class Pgsm *port, unsigned int msg_type, int direction)
 320 {
 321         char msgtext[64];
 322         struct interface *interface = interface_first;
 323
 324         interface = getinterfacebyname(interface_name);
 325         if (!interface)
 326                 return;
 327
 328         /* select message and primitive text */
 329         SCPY(msgtext, mncc_name(msg_type));
 330
 331         /* add direction */
 332         if (port) {
 333                 switch(port->p_type) {
 334                 case PORT_TYPE_GSM_BS_OUT:
 335                 case PORT_TYPE_GSM_BS_IN:
 336                         SCAT(msgtext, " LCR<->BSC");
 337                         break;
 338                 case PORT_TYPE_GSM_MS_OUT:
 339                 case PORT_TYPE_GSM_MS_IN:
 340                         SCAT(msgtext, " LCR<->MS");
 341                         break;
 342                 }
 343         } else
 344                 SCAT(msgtext, " ----");
 345
 346         /* init trace with given values */
 347         start_trace(-1,
 348                     interface,
 349                     port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
 350                     port?port->p_dialinginfo.id:NULL,
 351                     direction,
 352                     CATEGORY_CH,
 353                     port?port->p_serial:0,
 354                     msgtext);
 355 }
 356
 357 /* modify lchan to given payload type */
 358 void Pgsm::modify_lchan(int media_type)
 359 {
 360         struct gsm_mncc *mode;
 361
 362         /* already modified to that payload type */
 363         if (p_g_media_type == media_type)
 364                 return;
 365
 366         p_g_media_type = media_type;
 367         gsm_trace_header(p_g_interface_name, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
 368         mode = create_mncc(MNCC_LCHAN_MODIFY, p_g_callref);
 369         switch (media_type) {
 370         case MEDIA_TYPE_GSM_EFR:
 371                 add_trace("speech", "version", "EFR given");
 372                 mode->lchan_mode = 0x21; /* GSM V2 */
 373                 break;
 374         case MEDIA_TYPE_AMR:
 375                 add_trace("speech", "version", "AMR given");
 376                 mode->lchan_mode = 0x41; /* GSM V3 */
 377                 break;
 378         default:
 379                 add_trace("speech", "version", "Full/Half Rate given");
 380                 mode->lchan_mode = 0x01; /* GSM V1 */
 381         }
 382         mode->lchan_type = 0x02; /* FIXME: unused */
 383         add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
 384         end_trace();
 385         send_and_free_mncc(p_g_lcr_gsm, mode->msg_type, mode);
 386 }
 387
 388 /* CALL PROCEEDING INDICATION (from network) */
 389 void Pgsm::call_proc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 390 {
 391         struct lcr_msg *message;
 392         struct gsm_mncc *frame;
 393
 394         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 395         end_trace();
 396
 397         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
 398         message_put(message);
 399
 400         new_state(PORT_STATE_OUT_PROCEEDING);
 401
 402         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 403                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 404                 end_trace();
 405                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 406                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 407                 p_g_tch_connected = 1;
 408         }
 409 }
 410
 411 /* ALERTING INDICATION */
 412 void Pgsm::alert_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 413 {
 414         struct lcr_msg *message;
 415         struct gsm_mncc *frame;
 416
 417         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 418         end_trace();
 419
 420         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_ALERTING);
 421         message_put(message);
 422
 423         new_state(PORT_STATE_OUT_ALERTING);
 424
 425         if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
 426                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 427                 end_trace();
 428                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 429                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 430                 p_g_tch_connected = 1;
 431         }
 432 }
 433
 434 /* CONNECT INDICATION */
 435 void Pgsm::setup_cnf(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 436 {
 437         struct gsm_mncc *resp, *frame;
 438         struct lcr_msg *message;
 439
 440         SCPY(p_connectinfo.id, mncc->connected.number);
 441         SCPY(p_connectinfo.imsi, mncc->imsi);
 442         p_connectinfo.present = INFO_PRESENT_ALLOWED;
 443         p_connectinfo.screen = INFO_SCREEN_NETWORK;
 444         p_connectinfo.ntype = INFO_NTYPE_UNKNOWN;
 445         SCPY(p_connectinfo.interface, p_g_interface_name);
 446
 447         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 448         if (p_connectinfo.id[0])
 449                 add_trace("connect", "number", "%s", p_connectinfo.id);
 450         else if (mncc->imsi[0])
 451                 SPRINT(p_connectinfo.id, "imsi-%s", p_connectinfo.imsi);
 452         if (mncc->imsi[0])
 453                 add_trace("connect", "imsi", "%s", p_connectinfo.imsi);
 454         end_trace();
 455
 456         /* send resp */
 457         gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_COMPL_REQ, DIRECTION_OUT);
 458         resp = create_mncc(MNCC_SETUP_COMPL_REQ, p_g_callref);
 459         end_trace();
 460         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 461
 462         new_state(PORT_STATE_CONNECT);
 463
 464         if (!p_g_tch_connected) { /* only if ... */
 465                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 466                 end_trace();
 467                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 468                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 469                 p_g_tch_connected = 1;
 470         }
 471
 472         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
 473         memcpy(&message->param.connectinfo, &p_connectinfo, sizeof(struct connect_info));
 474
 475         /* if we have a bridge, but not yet modified, the phone accepts out requested payload.
 476          * we force the first in list */
 477         if (p_g_rtp_bridge) {
 478                 if (!p_g_media_type) {
 479                         /* modify to first given type */
 480                         modify_lchan(p_g_rtp_media_types[0]);
 481                         /* also set payload type */
 482                         p_g_payload_type = p_g_rtp_payload_types[0];
 483                 }
 484                 message->param.connectinfo.rtpinfo.media_types[0] = p_g_media_type;
 485                 message->param.connectinfo.rtpinfo.payload_types[0] = p_g_payload_type;
 486                 message->param.connectinfo.rtpinfo.payloads = 1;
 487         }
 488
 489         if (p_g_rtp_bridge) {
 490                 struct gsm_mncc_rtp *rtp;
 491
 492                 PDEBUG(DEBUG_GSM, "Request RTP peer info, before forwarding connect msg\n");
 493                 p_g_connect_pending = message;
 494                 rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CREATE, p_g_callref);
 495                 send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
 496         } else
 497                 message_put(message);
 498 }
 499
 500 /* CONNECT ACK INDICATION */
 501 void Pgsm::setup_compl_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 502 {
 503         struct gsm_mncc *frame;
 504
 505         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 506         end_trace();
 507
 508         new_state(PORT_STATE_CONNECT);
 509
 510         if (!p_g_tch_connected) { /* only if ... */
 511                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 512                 end_trace();
 513                 frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 514                 send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
 515                 p_g_tch_connected = 1;
 516         }
 517 }
 518
 519 /* DISCONNECT INDICATION */
 520 void Pgsm::disc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 521 {
 522         struct lcr_msg *message;
 523         int cause = 16, location = 0;
 524         struct gsm_mncc *resp;
 525
 526         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 527         if (mncc->fields & MNCC_F_CAUSE) {
 528                 location = mncc->cause.location;
 529                 cause = mncc->cause.value;
 530                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 531                 add_trace("cause", "location", "%d", location);
 532                 add_trace("cause", "value", "%d", cause);
 533         }
 534         end_trace();
 535
 536         /* send release */
 537         resp = create_mncc(MNCC_REL_REQ, p_g_callref);
 538         gsm_trace_header(p_g_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
 539 #if 0
 540         resp->fields |= MNCC_F_CAUSE;
 541         resp->cause.coding = 3;
 542         resp->cause.location = 1;
 543         resp->cause.value = cause;
 544         add_trace("cause", "coding", "%d", resp->cause.coding);
 545         add_trace("cause", "location", "%d", resp->cause.location);
 546         add_trace("cause", "value", "%d", resp->cause.value);
 547 #endif
 548         end_trace();
 549         send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 550
 551         /* sending release to endpoint */
 552         while(p_epointlist) {
 553                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 554                 message->param.disconnectinfo.cause = cause;
 555                 message->param.disconnectinfo.location = location;
 556                 message_put(message);
 557                 /* remove epoint */
 558                 free_epointlist(p_epointlist);
 559         }
 560         new_state(PORT_STATE_RELEASE);
 561         trigger_work(&p_g_delete);
 562 }
 563
 564 /* CC_RELEASE INDICATION */
 565 void Pgsm::rel_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 566 {
 567         int location = 0, cause = 16;
 568         struct lcr_msg *message;
 569
 570         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 571         if (mncc->fields & MNCC_F_CAUSE) {
 572                 location = mncc->cause.location;
 573                 cause = mncc->cause.value;
 574                 add_trace("cause", "coding", "%d", mncc->cause.coding);
 575                 add_trace("cause", "location", "%d", mncc->cause.location);
 576                 add_trace("cause", "value", "%d", mncc->cause.value);
 577         }
 578         end_trace();
 579
 580         /* sending release to endpoint */
 581         while(p_epointlist) {
 582                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 583                 message->param.disconnectinfo.cause = cause;
 584                 message->param.disconnectinfo.location = location;
 585                 message_put(message);
 586                 /* remove epoint */
 587                 free_epointlist(p_epointlist);
 588         }
 589         new_state(PORT_STATE_RELEASE);
 590         trigger_work(&p_g_delete);
 591 }
 592
 593 /* NOTIFY INDICATION */
 594 void Pgsm::notify_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 595 {
 596         struct lcr_msg *message;
 597
 598         gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
 599         add_trace("notify", NULL, "%d", mncc->notify);
 600         end_trace();
 601
 602         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
 603         message->param.notifyinfo.notify = mncc->notify;
 604         message_put(message);
 605 }
 606
 607 /* MESSAGE_NOTIFY */
 608 void Pgsm::message_notify(unsigned int epoint_id, int message_id, union parameter *param)
 609 {
 610         struct gsm_mncc *mncc;
 611         int notify;
 612
 613 //      printf("if = %d\n", param->notifyinfo.notify);
 614         if (param->notifyinfo.notify>INFO_NOTIFY_NONE) {
 615                 notify = param->notifyinfo.notify & 0x7f;
 616                 if (p_state!=PORT_STATE_CONNECT /*&& p_state!=PORT_STATE_IN_PROCEEDING*/ && p_state!=PORT_STATE_IN_ALERTING) {
 617                         /* queue notification */
 618                         if (p_g_notify_pending)
 619                                 message_free(p_g_notify_pending);
 620                         p_g_notify_pending = message_create(ACTIVE_EPOINT(p_epointlist), p_serial, EPOINT_TO_PORT, message_id);
 621                         memcpy(&p_g_notify_pending->param, param, sizeof(union parameter));
 622                 } else {
 623                         /* sending notification */
 624                         gsm_trace_header(p_g_interface_name, this, MNCC_NOTIFY_REQ, DIRECTION_OUT);
 625                         add_trace("notify", NULL, "%d", notify);
 626                         end_trace();
 627                         mncc = create_mncc(MNCC_NOTIFY_REQ, p_g_callref);
 628                         mncc->notify = notify;
 629                         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 630                 }
 631         }
 632 }
 633
 634 /* RTP create indication */
 635 void Pgsm::rtp_create_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 636 {
 637         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 638
 639         /* send queued setup, as we received remote RTP info */
 640         if (p_g_setup_pending) {
 641                 struct lcr_msg *message;
 642
 643                 message = p_g_setup_pending;
 644                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding setup\n", rtp->ip, rtp->port);
 645                 message->param.setup.rtpinfo.ip = rtp->ip;
 646                 message->param.setup.rtpinfo.port = rtp->port;
 647                 message_put(message);
 648                 p_g_setup_pending = NULL;
 649         }
 650         if (p_g_connect_pending) {
 651                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) connecting RTP... \n", rtp->ip, rtp->port);
 652                 send_mncc_rtp_connect();
 653         }
 654 }
 655
 656 /* RTP connect indication */
 657 void Pgsm::rtp_connect_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 658 {
 659         struct lcr_msg *message;
 660         struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
 661
 662         if (p_g_connect_pending) {
 663                 message = p_g_connect_pending;
 664                 PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding connect\n", rtp->ip, rtp->port);
 665                 message->param.connectinfo.rtpinfo.ip = rtp->ip;
 666                 message->param.connectinfo.rtpinfo.port = rtp->port;
 667                 message_put(message);
 668                 p_g_connect_pending = NULL;
 669         }
 670 }
 671
 672 /* MESSAGE_PROGRESS */
 673 void Pgsm::message_progress(unsigned int epoint_id, int message_id, union parameter *param)
 674 {
 675         if (param->progressinfo.progress == 8) {
 676                 PDEBUG(DEBUG_GSM, "Remote provides tones for us\n");
 677                 p_g_tones = 1;
 678         }
 679
 680         if (param->progressinfo.rtpinfo.port) {
 681                 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]);
 682
 683                 /* modify channel to givne type, also sets media type */
 684                 modify_lchan(param->progressinfo.rtpinfo.media_types[0]);
 685
 686                 /* connect RTP */
 687                 p_g_rtp_ip_remote = param->progressinfo.rtpinfo.ip;
 688                 p_g_rtp_port_remote = param->progressinfo.rtpinfo.port;
 689                 /* p_g_media_type is already set by modify_lchan() */
 690                 p_g_payload_type = param->progressinfo.rtpinfo.payload_types[0];
 691                 send_mncc_rtp_connect();
 692         }
 693 }
 694
 695 /* MESSAGE_ALERTING */
 696 void Pgsm::message_alerting(unsigned int epoint_id, int message_id, union parameter *param)
 697 {
 698         struct gsm_mncc *mncc;
 699
 700         /* send alert */
 701         gsm_trace_header(p_g_interface_name, this, MNCC_ALERT_REQ, DIRECTION_OUT);
 702         mncc = create_mncc(MNCC_ALERT_REQ, p_g_callref);
 703         if (p_g_tones) {
 704                 mncc->fields |= MNCC_F_PROGRESS;
 705                 mncc->progress.coding = 3; /* GSM */
 706                 mncc->progress.location = 1;
 707                 mncc->progress.descr = 8;
 708                 add_trace("progress", "coding", "%d", mncc->progress.coding);
 709                 add_trace("progress", "location", "%d", mncc->progress.location);
 710                 add_trace("progress", "descr", "%d", mncc->progress.descr);
 711         }
 712         end_trace();
 713         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 714
 715         new_state(PORT_STATE_IN_ALERTING);
 716
 717         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
 718                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 719                 end_trace();
 720                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 721                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 722                 p_g_tch_connected = 1;
 723         }
 724 }
 725
 726 /* MESSAGE_CONNECT */
 727 void Pgsm::message_connect(unsigned int epoint_id, int message_id, union parameter *param)
 728 {
 729         struct gsm_mncc *mncc;
 730
 731         /* copy connected information */
 732         memcpy(&p_connectinfo, &param->connectinfo, sizeof(p_connectinfo));
 733         /* screen outgoing caller id */
 734         do_screen(1, p_connectinfo.id, sizeof(p_connectinfo.id), &p_connectinfo.ntype, &p_connectinfo.present, p_g_interface_name);
 735
 736         /* send connect */
 737         mncc = create_mncc(MNCC_SETUP_RSP, p_g_callref);
 738         gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_RSP, DIRECTION_OUT);
 739         /* caller information */
 740         mncc->fields |= MNCC_F_CONNECTED;
 741         mncc->connected.plan = 1;
 742         switch (p_callerinfo.ntype) {
 743                 case INFO_NTYPE_UNKNOWN:
 744                 mncc->connected.type = 0x0;
 745                 break;
 746                 case INFO_NTYPE_INTERNATIONAL:
 747                 mncc->connected.type = 0x1;
 748                 break;
 749                 case INFO_NTYPE_NATIONAL:
 750                 mncc->connected.type = 0x2;
 751                 break;
 752                 case INFO_NTYPE_SUBSCRIBER:
 753                 mncc->connected.type = 0x4;
 754                 break;
 755                 default: /* INFO_NTYPE_NOTPRESENT */
 756                 mncc->fields &= ~MNCC_F_CONNECTED;
 757                 break;
 758         }
 759         switch (p_callerinfo.screen) {
 760                 case INFO_SCREEN_USER:
 761                 mncc->connected.screen = 0;
 762                 break;
 763                 default: /* INFO_SCREEN_NETWORK */
 764                 mncc->connected.screen = 3;
 765                 break;
 766         }
 767         switch (p_callerinfo.present) {
 768                 case INFO_PRESENT_ALLOWED:
 769                 mncc->connected.present = 0;
 770                 break;
 771                 case INFO_PRESENT_RESTRICTED:
 772                 mncc->connected.present = 1;
 773                 break;
 774                 default: /* INFO_PRESENT_NOTAVAIL */
 775                 mncc->connected.present = 2;
 776                 break;
 777         }
 778         if (mncc->fields & MNCC_F_CONNECTED) {
 779                 SCPY(mncc->connected.number, p_connectinfo.id);
 780                 add_trace("connected", "type", "%d", mncc->connected.type);
 781                 add_trace("connected", "plan", "%d", mncc->connected.plan);
 782                 add_trace("connected", "present", "%d", mncc->connected.present);
 783                 add_trace("connected", "screen", "%d", mncc->connected.screen);
 784                 add_trace("connected", "number", "%s", mncc->connected.number);
 785         }
 786         end_trace();
 787         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 788
 789         new_state(PORT_STATE_CONNECT_WAITING);
 790
 791         if (param->connectinfo.rtpinfo.port) {
 792                 PDEBUG(DEBUG_GSM, "CONNECT with RTP peer info, sent to BSC (%08x,%d)\n", param->connectinfo.rtpinfo.ip, param->connectinfo.rtpinfo.port);
 793
 794                 /* modify channel to givne type, also sets media type */
 795                 modify_lchan(param->connectinfo.rtpinfo.media_types[0]);
 796
 797                 /* connect RTP */
 798                 p_g_rtp_ip_remote = param->connectinfo.rtpinfo.ip;
 799                 p_g_rtp_port_remote = param->connectinfo.rtpinfo.port;
 800                 /* p_g_media_type is already set by modify_lchan() */
 801                 p_g_payload_type = param->connectinfo.rtpinfo.payload_types[0];
 802                 send_mncc_rtp_connect();
 803         }
 804 }
 805
 806 /* MESSAGE_DISCONNECT */
 807 void Pgsm::message_disconnect(unsigned int epoint_id, int message_id, union parameter *param)
 808 {
 809         struct gsm_mncc *mncc;
 810
 811         /* send disconnect */
 812         mncc = create_mncc(MNCC_DISC_REQ, p_g_callref);
 813         gsm_trace_header(p_g_interface_name, this, MNCC_DISC_REQ, DIRECTION_OUT);
 814         if (p_g_tones) {
 815                 mncc->fields |= MNCC_F_PROGRESS;
 816                 mncc->progress.coding = 3; /* GSM */
 817                 mncc->progress.location = 1;
 818                 mncc->progress.descr = 8;
 819                 add_trace("progress", "coding", "%d", mncc->progress.coding);
 820                 add_trace("progress", "location", "%d", mncc->progress.location);
 821                 add_trace("progress", "descr", "%d", mncc->progress.descr);
 822         }
 823         mncc->fields |= MNCC_F_CAUSE;
 824         mncc->cause.coding = 3;
 825         mncc->cause.location = param->disconnectinfo.location;
 826         mncc->cause.value = param->disconnectinfo.cause;
 827         add_trace("cause", "coding", "%d", mncc->cause.coding);
 828         add_trace("cause", "location", "%d", mncc->cause.location);
 829         add_trace("cause", "value", "%d", mncc->cause.value);
 830         end_trace();
 831         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 832
 833         new_state(PORT_STATE_OUT_DISCONNECT);
 834
 835         if (p_g_tones && !p_g_tch_connected) { /* only if ... */
 836                 gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
 837                 end_trace();
 838                 mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
 839                 send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 840                 p_g_tch_connected = 1;
 841         }
 842 }
 843
 844
 845 /* MESSAGE_RELEASE */
 846 void Pgsm::message_release(unsigned int epoint_id, int message_id, union parameter *param)
 847 {
 848         struct gsm_mncc *mncc;
 849
 850         /* send release */
 851         mncc = create_mncc(MNCC_REL_REQ, p_g_callref);
 852         gsm_trace_header(p_g_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
 853         mncc->fields |= MNCC_F_CAUSE;
 854         mncc->cause.coding = 3;
 855         mncc->cause.location = param->disconnectinfo.location;
 856         mncc->cause.value = param->disconnectinfo.cause;
 857         add_trace("cause", "coding", "%d", mncc->cause.coding);
 858         add_trace("cause", "location", "%d", mncc->cause.location);
 859         add_trace("cause", "value", "%d", mncc->cause.value);
 860         end_trace();
 861         send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
 862
 863         new_state(PORT_STATE_RELEASE);
 864         trigger_work(&p_g_delete);
 865         return;
 866 }
 867
 868 /*
 869  * endpoint sends messages to the port
 870  */
 871 int Pgsm::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
 872 {
 873         int ret = 0;
 874
 875         if (Port::message_epoint(epoint_id, message_id, param))
 876                 return 1;
 877
 878         switch(message_id) {
 879                 case MESSAGE_NOTIFY: /* display and notifications */
 880                 ret = 1;
 881                 message_notify(epoint_id, message_id, param);
 882                 break;
 883
 884 //              case MESSAGE_FACILITY: /* facility message */
 885 //              message_facility(epoint_id, message_id, param);
 886 //              break;
 887
 888                 case MESSAGE_PROCEEDING: /* message not handles */
 889                 ret = 1;
 890                 break;
 891
 892                 case MESSAGE_PROGRESS:
 893                 ret = 1;
 894                 message_progress(epoint_id, message_id, param);
 895                 break;
 896
 897                 case MESSAGE_ALERTING: /* call of endpoint is ringing */
 898                 ret = 1;
 899                 if (p_state!=PORT_STATE_IN_PROCEEDING)
 900                         break;
 901                 message_alerting(epoint_id, message_id, param);
 902                 if (p_g_notify_pending) {
 903                         /* send pending notify message during connect */
 904                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
 905                         message_free(p_g_notify_pending);
 906                         p_g_notify_pending = NULL;
 907                 }
 908                 break;
 909
 910                 case MESSAGE_CONNECT: /* call of endpoint is connected */
 911                 ret = 1;
 912                 if (p_state!=PORT_STATE_IN_PROCEEDING
 913                  && p_state!=PORT_STATE_IN_ALERTING)
 914                         break;
 915                 message_connect(epoint_id, message_id, param);
 916                 if (p_g_notify_pending) {
 917                         /* send pending notify message during connect */
 918                         message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
 919                         message_free(p_g_notify_pending);
 920                         p_g_notify_pending = NULL;
 921                 }
 922                 break;
 923
 924                 case MESSAGE_DISCONNECT: /* call has been disconnected */
 925                 ret = 1;
 926                 if (p_state!=PORT_STATE_IN_PROCEEDING
 927                  && p_state!=PORT_STATE_IN_ALERTING
 928                  && p_state!=PORT_STATE_OUT_SETUP
 929                  && p_state!=PORT_STATE_OUT_OVERLAP
 930                  && p_state!=PORT_STATE_OUT_PROCEEDING
 931                  && p_state!=PORT_STATE_OUT_ALERTING
 932                  && p_state!=PORT_STATE_CONNECT
 933                  && p_state!=PORT_STATE_CONNECT_WAITING)
 934                         break;
 935                 message_disconnect(epoint_id, message_id, param);
 936                 break;
 937
 938                 case MESSAGE_RELEASE: /* release isdn port */
 939                 ret = 1;
 940                 if (p_state==PORT_STATE_RELEASE)
 941                         break;
 942                 message_release(epoint_id, message_id, param);
 943                 break;
 944
 945         }
 946
 947         return ret;
 948 }
 949
 950 /* deletes only if l3id is release, otherwhise it will be triggered then */
 951 static int delete_event(struct lcr_work *work, void *instance, int index)
 952 {
 953         class Pgsm *gsmport = (class Pgsm *)instance;
 954
 955         delete gsmport;
 956
 957         return 0;
 958 }
 959
 960 int gsm_exit(int rc)
 961 {
 962         return(rc);
 963 }
 964
 965 int gsm_init(void)
 966 {
 967         /* seed the PRNG */
 968         srand(time(NULL));
 969
 970         return 0;
 971 }
 972
 973 /*
 974  * MNCC interface
 975  */
 976
 977 static int mncc_q_enqueue(struct lcr_gsm *lcr_gsm, struct gsm_mncc *mncc, unsigned int len)
 978 {
 979         struct mncc_q_entry *qe;
 980
 981         qe = (struct mncc_q_entry *) MALLOC(sizeof(*qe)+sizeof(*mncc)+len);
 982         if (!qe)
 983                 return -ENOMEM;
 984
 985         qe->next = NULL;
 986         qe->len = len;
 987         memcpy(qe->data, mncc, len);
 988
 989         /* in case of empty list ... */
 990         if (!lcr_gsm->mncc_q_hd && !lcr_gsm->mncc_q_tail) {
 991                 /* the list head and tail both point to the new qe */
 992                 lcr_gsm->mncc_q_hd = lcr_gsm->mncc_q_tail = qe;
 993         } else {
 994                 /* append to tail of list */
 995                 lcr_gsm->mncc_q_tail->next = qe;
 996                 lcr_gsm->mncc_q_tail = qe;
 997         }
 998
 999         lcr_gsm->mncc_lfd.when |= LCR_FD_WRITE;
1000
1001         return 0;
1002 }
1003
1004 static struct mncc_q_entry *mncc_q_dequeue(struct lcr_gsm *lcr_gsm)
1005 {
1006         struct mncc_q_entry *qe = lcr_gsm->mncc_q_hd;
1007         if (!qe)
1008                 return NULL;
1009
1010         /* dequeue the successfully sent message */
1011         lcr_gsm->mncc_q_hd = qe->next;
1012         if (!qe)
1013                 return NULL;
1014         if (qe == lcr_gsm->mncc_q_tail)
1015                 lcr_gsm->mncc_q_tail = NULL;
1016
1017         return qe;
1018 }
1019
1020 /* routine called by LCR code if it wants to send a message to OpenBSC */
1021 static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data)
1022 {
1023         int len = 0;
1024
1025         /* FIXME: the caller should provide this */
1026         switch (msg_type) {
1027         case GSM_TCHF_FRAME:
1028                 len = sizeof(struct gsm_data_frame) + 33;
1029                 break;
1030         default:
1031                 len = sizeof(struct gsm_mncc);
1032                 break;
1033         }
1034
1035         return mncc_q_enqueue(lcr_gsm, (struct gsm_mncc *)data, len);
1036 }
1037
1038 /* close MNCC socket */
1039 static int mncc_fd_close(struct lcr_gsm *lcr_gsm, struct lcr_fd *lfd)
1040 {
1041         class Port *port;
1042         class Pgsm *pgsm = NULL;
1043         struct lcr_msg *message;
1044
1045         PERROR("Lost MNCC socket, retrying in %u seconds\n", SOCKET_RETRY_TIMER);
1046         close(lfd->fd);
1047         unregister_fd(lfd);
1048         lfd->fd = -1;
1049
1050         /* free all the calls that were running through the MNCC interface */
1051         port = port_first;
1052         while(port) {
1053                 if ((port->p_type & PORT_CLASS_mISDN_MASK) == PORT_CLASS_GSM) {
1054                         pgsm = (class Pgsm *)port;
1055                         if (pgsm->p_g_lcr_gsm == lcr_gsm) {
1056                                 message = message_create(pgsm->p_serial, ACTIVE_EPOINT(pgsm->p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
1057                                 message->param.disconnectinfo.cause = 27; // temp. unavail.
1058                                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
1059                                 message_put(message);
1060                                 pgsm->new_state(PORT_STATE_RELEASE);
1061                                 trigger_work(&pgsm->p_g_delete);
1062                         }
1063                 }
1064                 port = port->next;
1065         }
1066
1067         /* flush the queue */
1068         while (mncc_q_dequeue(lcr_gsm))
1069                 ;
1070
1071         /* start the re-connect timer */
1072         schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1073
1074         return 0;
1075 }
1076
1077 /* write to OpenBSC via MNCC socket */
1078 static int mncc_fd_write(struct lcr_fd *lfd, void *inst, int idx)
1079 {
1080         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1081         struct mncc_q_entry *qe, *qe2;
1082         int rc;
1083
1084         while (1) {
1085                 qe = lcr_gsm->mncc_q_hd;
1086                 if (!qe) {
1087                         lfd->when &= ~LCR_FD_WRITE;
1088                         break;
1089                 }
1090                 rc = write(lfd->fd, qe->data, qe->len);
1091                 if (rc == 0)
1092                         return mncc_fd_close(lcr_gsm, lfd);
1093                 if (rc < 0)
1094                         return rc;
1095                 if (rc < (int)qe->len)
1096                         return -1;
1097                 /* dequeue the successfully sent message */
1098                 qe2 = mncc_q_dequeue(lcr_gsm);
1099                 assert(qe == qe2);
1100                 free(qe);
1101         }
1102         return 0;
1103 }
1104
1105 /* read from OpenBSC via MNCC socket */
1106 static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
1107 {
1108         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1109         int rc;
1110         static char buf[sizeof(struct gsm_mncc)+1024];
1111         struct gsm_mncc *mncc_prim = (struct gsm_mncc *) buf;
1112
1113         memset(buf, 0, sizeof(buf));
1114         rc = recv(lfd->fd, buf, sizeof(buf), 0);
1115         if (rc == 0)
1116                 return mncc_fd_close(lcr_gsm, lfd);
1117         if (rc < 0)
1118                 return rc;
1119
1120         /* Hand the MNCC message into LCR */
1121         switch (lcr_gsm->type) {
1122 #ifdef WITH_GSM_BS
1123         case LCR_GSM_TYPE_NETWORK:
1124                 return message_bsc(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1125 #endif
1126 #ifdef WITH_GSM_MS
1127         case LCR_GSM_TYPE_MS:
1128                 return message_ms(lcr_gsm, mncc_prim->msg_type, mncc_prim);
1129 #endif
1130         default:
1131                 return 0;
1132         }
1133 }
1134
1135 /* file descriptor callback if we can read or write form MNCC socket */
1136 static int mncc_fd_cb(struct lcr_fd *lfd, unsigned int what, void *inst, int idx)
1137 {
1138         int rc = 0;
1139
1140         if (what & LCR_FD_READ)
1141                 rc = mncc_fd_read(lfd, inst, idx);
1142         if (rc < 0)
1143                 return rc;
1144
1145         if (what & LCR_FD_WRITE)
1146                 rc = mncc_fd_write(lfd, inst, idx);
1147
1148         return rc;
1149 }
1150
1151 int mncc_socket_retry_cb(struct lcr_timer *timer, void *inst, int index)
1152 {
1153         struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
1154         int fd, rc;
1155
1156         lcr_gsm->mncc_lfd.fd = -1;
1157
1158         fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
1159         if (fd < 0) {
1160                 PERROR("Cannot create SEQPACKET socket, giving up!\n");
1161                 return fd;
1162         }
1163
1164         rc = connect(fd, (struct sockaddr *) &lcr_gsm->sun,
1165                      sizeof(lcr_gsm->sun));
1166         if (rc < 0) {
1167                 PERROR("Could not connect to MNCC socket %s, "
1168                         "retrying in %u seconds\n", lcr_gsm->sun.sun_path,
1169                         SOCKET_RETRY_TIMER);
1170                 close(fd);
1171                 schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
1172         } else {
1173                 PDEBUG(DEBUG_GSM, "Connected to MNCC socket %s!\n", lcr_gsm->sun.sun_path);
1174                 lcr_gsm->mncc_lfd.fd = fd;
1175                 register_fd(&lcr_gsm->mncc_lfd, LCR_FD_READ, &mncc_fd_cb, lcr_gsm, 0);
1176         }
1177
1178         return 0;
1179 }
1180