ss5.cpp

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** LCR                                                                       **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** mISDN ss5                                                                 **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 /*
  13  * STATES:
  14  *
  15  * there are three types of states
  16  *
  17  * - the port state (p_state): used for current call state
  18  * - the ss5 state (p_m_s_state): used for current tone
  19  * - the ss5 signal state (p_m_s_signal): used for current signal state of current tone
  20  *
  21  * the port state differs from isdn state:
  22  *
  23  * - PORT_STATE_IDLE: used until number is complete. outgoing overlap dialing is received in this state.
  24  * - PORT_STATE_OUT_SETUP: the seizing procedure is started.
  25  * - PORT_STATE_OUT_OVERLAP: the transmitter is sending the digits.
  26  * - PORT_STATE_OUT_PROCEEDING: the digits are sent, we wait until someone answers.
  27  * - PORT_STATE_CONNECT: a call is answered on either side.
  28  * - PORT_STATE_IN_SETUP: the seizing is received, we wait for the first digit.
  29  * - PORT_STATE_IN_OVERLAP: the digits are received.
  30  * - PORT_STATE_IN_PROCEEDING: the number is complete, a SETUP is indicated.
  31  * - PORT_STATE_IN_DISCONNECT: a clear-back was received, an DISCONNECT is indicated.
  32  * - PORT_STATE_RELEASE: the clear forward procedure is started.
  33  *
  34  */
  35
  36 #include "main.h"
  37
  38 //#define DEBUG_DETECT
  39
  40 /* ss5 signal states */
  41 enum {
  42         SS5_STATE_IDLE,                 /* no signal */
  43         SS5_STATE_SEIZING,              /* seizing */
  44         SS5_STATE_PROCEED_TO_SEND,      /* proceed-to-send */
  45         SS5_STATE_BUSY_FLASH,           /* busy-flash / clear back */
  46         SS5_STATE_ACK_BUSY_FLASH,       /* acknowledge of busy/answer/clear-back */
  47         SS5_STATE_ANSWER,               /* answer */
  48         SS5_STATE_ACK_ANSWER,           /* acknowledge of busy/answer/clear-back */
  49         SS5_STATE_FORWARD_TRANSFER,     /* forward transfer */
  50         SS5_STATE_CLEAR_BACK,           /* clear-back */
  51         SS5_STATE_ACK_CLEAR_BACK,       /* acknowledge of busy/answer/clear-back */
  52         SS5_STATE_CLEAR_FORWARD,        /* clear-forward */
  53         SS5_STATE_RELEASE_GUARD,        /* release-guard */
  54         SS5_STATE_DIAL_OUT,             /* dialing state (transmitter) */
  55         SS5_STATE_DIAL_IN,              /* dialing state (receiver) */
  56         SS5_STATE_DIAL_IN_PULSE,        /* dialing state (receiver with pulses) */
  57         SS5_STATE_DELAY,                /* after signal wait until next signal can be sent */
  58         SS5_STATE_DOUBLE_SEIZE,         /* in case of a double seize, we make the remote size recognize it */
  59 };
  60 const char *ss5_state_name[] = {
  61         "STATE_IDLE",
  62         "STATE_SEIZING",
  63         "STATE_PROCEED_TO_SEND",
  64         "STATE_BUSY_FLASH",
  65         "STATE_ACK_BUSY_FLASH",
  66         "STATE_ANSWER",
  67         "STATE_ACK_ANSWER",
  68         "STATE_FORWARD_TRANSFER",
  69         "STATE_CLEAR_BACK",
  70         "STATE_ACK_CLEAR_BACK",
  71         "STATE_CLEAR_FORWARD",
  72         "STATE_RELEASE_GUARD",
  73         "STATE_DIAL_OUT",
  74         "STATE_DIAL_IN",
  75         "STATE_DIAL_IN_PULSE",
  76         "STATE_DELAY",
  77         "STATE_DOUBLE_SEIZE",
  78 };
  79
  80 enum {
  81         SS5_SIGNAL_NULL,
  82         /* sending signal states */
  83         SS5_SIGNAL_SEND_ON,             /* sending signal, waiting for acknowledge */
  84         SS5_SIGNAL_SEND_ON_RECOG,       /* sending signal, receiving ack, waiting for recogition timer */
  85         SS5_SIGNAL_SEND_OFF,            /* silence, receiving ack, waiting for stop */
  86         /* receiving signal states */
  87         SS5_SIGNAL_RECEIVE_RECOG,       /* receiving signal, waiting for recognition timer */
  88         SS5_SIGNAL_RECEIVE,             /* receiving signal / send ack, waiting for stop */
  89         SS5_SIGNAL_DELAY,               /* delay after release guard to prevent ping-pong */
  90         /* sending / receiving digit states */
  91         SS5_SIGNAL_DIGIT_PAUSE,         /* pausing before sending (next) digit */
  92         SS5_SIGNAL_DIGIT_ON,            /* sending digit */
  93         SS5_SIGNAL_PULSE_OFF,           /* make */
  94         SS5_SIGNAL_PULSE_ON,            /* break */
  95 };
  96 const char *ss5_signal_name[] = {
  97         "NULL",
  98         "SIGNAL_SEND_ON",
  99         "SIGNAL_SEND_ON_RECOG",
 100         "SIGNAL_SEND_OFF",
 101         "SIGNAL_RECEIVE_RECOG",
 102         "SIGNAL_RECEIVE",
 103         "SIGNAL_DELAY",
 104         "SIGNAL_DIGIT_PAUSE",
 105         "SIGNAL_DIGIT_ON",
 106         "SIGNAL_PULSE_OFF",
 107         "SIGNAL_PULSE_ON",
 108 };
 109
 110 /* ss5 signal timers (in samples) */
 111 #define SS5_TIMER_AFTER_SIGNAL  (100*8) /* wait after signal is terminated */
 112 #define SS5_TIMER_KP            (100*8) /* duration of KP1 or KP2 digit */
 113 #define SS5_TIMER_DIGIT         (55*8)  /* duration of all other digits */
 114 #define SS5_TIMER_PAUSE         (55*8)  /* pause between digits */
 115 #define SS5_TIMER_FORWARD       (850*8) /* forward transfer length */
 116 #define SS5_TIMER_RECOG_SEIZE   (40*8)  /* recognition time of seizing / proceed-to-send signal */
 117 #define SS5_TIMER_RECOG_OTHER   (125*8) /* recognition time of all other f1/f2 signals */
 118 #define SS5_TIMER_SIGNAL_LOSS   (15*8)  /* minimum time of signal loss for a continous signal */
 119 #define SS5_TIMER_DOUBLE_SEIZE  (850*8) /* double seize length */
 120 #define SS5_TIMER_RELEASE_GUARD (850*8) /* be sure to release after clear-forward */
 121 #define SS5_TIMER_RELEASE_MAX   (2000*8)/* maximum time for release guard to prevent 'double-releasing' */
 122 #define SS5_TIMER_RELEASE_DELAY (4000*8)/* wait after release guard to prevent ping-pong */
 123 #define BELL_TIMER_BREAK        (50*8)  /* loop open, tone */
 124 #define BELL_TIMER_MAKE         (50*8)  /* loop closed, no tone */
 125 #define BELL_TIMER_PAUSE        (800*8) /* interdigit delay */
 126 #define BELL_TIMER_RECOG_HANGUP (200*8) /* time to recognize hangup */
 127 #define BELL_TIMER_RECOG_END    (300*8) /* recognize end of digit */
 128
 129 /* ss5 timers */
 130 #define SS5_TIMER_OVERLAP       5.0     /* timeout for overlap digits received on outgoing exchange */
 131
 132
 133 /*
 134  * ss5 trace header
 135  */
 136 enum { /* even values are indications, odd values are requests */
 137         SS5_SEIZING_IND,
 138         SS5_SEIZING_REQ,
 139         SS5_PROCEED_TO_SEND_IND,
 140         SS5_PROCEED_TO_SEND_REQ,
 141         SS5_BUSY_FLASH_IND,
 142         SS5_BUSY_FLASH_REQ,
 143         SS5_ANSWER_IND,
 144         SS5_ANSWER_REQ,
 145         SS5_CLEAR_BACK_IND,
 146         SS5_CLEAR_BACK_REQ,
 147         SS5_CLEAR_FORWARD_IND,
 148         SS5_CLEAR_FORWARD_REQ,
 149         SS5_RELEASE_GUARD_IND,
 150         SS5_RELEASE_GUARD_REQ,
 151         SS5_ACKNOWLEDGE_IND,
 152         SS5_ACKNOWLEDGE_REQ,
 153         SS5_DOUBLE_SEIZURE_IND,
 154         SS5_DOUBLE_SEIZURE_REQ,
 155         SS5_DIALING_IND,
 156         SS5_DIALING_REQ,
 157         SS5_FORWARD_TRANSFER_IND,
 158         SS5_FORWARD_TRANSFER_REQ,
 159 };
 160 static struct isdn_message {
 161         const char *name;
 162         unsigned int value;
 163 } ss5_message[] = {
 164         {"SEIZING RECEIVED", SS5_SEIZING_IND},
 165         {"SEIZING SENDING", SS5_SEIZING_REQ},
 166         {"PROCEED-TO-SEND RECEIVED", SS5_PROCEED_TO_SEND_IND},
 167         {"PROCEED-TO-SEND SENDING", SS5_PROCEED_TO_SEND_REQ},
 168         {"BUSY-FLASH RECEIVED", SS5_BUSY_FLASH_IND},
 169         {"BUSY-FLASH SENDING", SS5_BUSY_FLASH_REQ},
 170         {"ANSWER RECEIVED", SS5_ANSWER_IND},
 171         {"ANSWER SENDING", SS5_ANSWER_REQ},
 172         {"CLEAR-BACK RECEIVED", SS5_CLEAR_BACK_IND},
 173         {"CLEAR-BACK SENDING", SS5_CLEAR_BACK_REQ},
 174         {"CLEAR-FORWARD RECEIVED", SS5_CLEAR_FORWARD_IND},
 175         {"CLEAR-FORWARD SENDING", SS5_CLEAR_FORWARD_REQ},
 176         {"RELEASE-GUARD RECEIVED", SS5_RELEASE_GUARD_IND},
 177         {"RELEASE-GUARD SENDING", SS5_RELEASE_GUARD_REQ},
 178         {"ACKNOWLEDGE RECEIVED", SS5_ACKNOWLEDGE_IND},
 179         {"ACKNOWLEDGE SENDING", SS5_ACKNOWLEDGE_REQ},
 180         {"DOUBLE-SEIZURE RECEIVED", SS5_DOUBLE_SEIZURE_IND},
 181         {"DOUBLE-SEIZURE SENDING", SS5_DOUBLE_SEIZURE_REQ},
 182         {"DIALING RECEIVED", SS5_DIALING_IND},
 183         {"DIALING SENDING", SS5_DIALING_REQ},
 184         {"FORWARD-TRANSFER RECEIVED", SS5_FORWARD_TRANSFER_IND},
 185         {"FORWARD-TRANSFER SENDING", SS5_FORWARD_TRANSFER_REQ},
 186         {NULL, 0},
 187 };
 188 static void ss5_trace_header(struct mISDNport *mISDNport, class PmISDN *port, unsigned int msg, int channel)
 189 {
 190         int i;
 191         char msgtext[64];
 192
 193         SCPY(msgtext, "<<UNKNOWN MESSAGE>>");
 194         /* select message and primitive text */
 195         i = 0;
 196         while(ss5_message[i].name) {
 197 //              if (msg == L3_NOTIFY_REQ) printf("val = %x %s\n", isdn_message[i].value, isdn_message[i].name);
 198                 if (ss5_message[i].value == msg) {
 199                         SCPY(msgtext, ss5_message[i].name);
 200                         break;
 201                 }
 202                 i++;
 203         }
 204
 205         /* init trace with given values */
 206         start_trace(mISDNport?mISDNport->portnum:-1,
 207                     mISDNport?(mISDNport->ifport?mISDNport->ifport->interface:NULL):NULL,
 208                     port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
 209                     port?port->p_dialinginfo.id:NULL,
 210                     (msg&1)?DIRECTION_OUT:DIRECTION_IN,
 211                     CATEGORY_CH,
 212                     port?port->p_serial:0,
 213                     msgtext);
 214         add_trace("channel", NULL, "%d", channel);
 215         switch (port->p_type) {
 216                 case PORT_TYPE_SS5_OUT:
 217                 add_trace("state", NULL, "outgoing");
 218                 break;
 219                 case PORT_TYPE_SS5_IN:
 220                 add_trace("state", NULL, "incomming");
 221                 break;
 222                 default:
 223                 add_trace("state", NULL, "idle");
 224                 break;
 225         }
 226 }
 227
 228
 229 /*
 230  * changes release tone int busy signal
 231  * this makes the line more authentic
 232  */
 233 void Pss5::set_tone(const char *dir, const char *name)
 234 {
 235         if (name && !strcmp(name, "cause_10"))
 236                 name = "busy";
 237
 238         PmISDN::set_tone(dir, name);
 239 }
 240
 241 /*
 242  * creation of static channels
 243  */
 244 void ss5_create_channel(struct mISDNport *mISDNport, int i)
 245 {
 246         class Pss5              *ss5port;
 247         char                    portname[32];
 248         struct port_settings    port_settings;
 249
 250         SPRINT(portname, "%s-%d", mISDNport->name, i+1);
 251
 252         memset(&port_settings, 0, sizeof(port_settings));
 253         SCPY(port_settings.tones_dir, options.tones_dir);
 254
 255         ss5port = new Pss5(PORT_TYPE_SS5_IDLE, mISDNport, portname, &port_settings, i + (i>=15) + 1, 1, B_MODE_TRANSPARENT);
 256         if (!ss5port)
 257                 FATAL("No memory for Pss5 class.\n");
 258         if (!ss5port->p_m_b_channel)
 259                 FATAL("No bchannel on given index.\n");
 260
 261         /* connect channel */
 262         bchannel_event(mISDNport, ss5port->p_m_b_index, B_EVENT_USE);
 263
 264 }
 265
 266
 267 /*
 268  * hunt for a free line
 269  * this function returns a port object in idle state.
 270  */
 271 class Pss5 *ss5_hunt_line(struct mISDNport *mISDNport)
 272 {
 273         int i;
 274         class Port      *port;
 275         class Pss5      *ss5port = NULL;
 276         struct select_channel *selchannel;
 277
 278         PDEBUG(DEBUG_SS5, "Entered name=%s\n", mISDNport->name);
 279         selchannel = mISDNport->ifport->out_channel;
 280         while(selchannel) {
 281                 switch(selchannel->channel) {
 282                         case CHANNEL_FREE: /* free channel */
 283                         case CHANNEL_ANY: /* any channel */
 284                         for (i = 0; i < mISDNport->b_num; i++) {
 285                                 port = mISDNport->b_port[i];
 286                                 PDEBUG(DEBUG_SS5, "Checking port %p on index\n", port, i);
 287                                 if (!port)
 288                                         continue;
 289                                 if (port->p_type == PORT_TYPE_SS5_IN || port->p_type == PORT_TYPE_SS5_OUT)
 290                                         PDEBUG(DEBUG_SS5, "Checking port %s: channel %d not available, because port not idle type.\n",
 291                                                 mISDNport->name, i);
 292                                 if (port->p_type != PORT_TYPE_SS5_IDLE)
 293                                         continue;
 294                                 ss5port = (class Pss5 *)port;
 295                                 /* is really idle ? */
 296                                 if (ss5port->p_state == PORT_STATE_IDLE
 297                                  && ss5port->p_m_s_state == SS5_STATE_IDLE)
 298                                         return ss5port;
 299                                 PDEBUG(DEBUG_SS5, "Checking port %s: channel %d not available, because p_state=%d, ss5_state=%d.\n",
 300                                         mISDNport->name, i, ss5port->p_state,ss5port->p_m_s_state);
 301                         }
 302                         PDEBUG(DEBUG_SS5, "no free interface\n");
 303                         return NULL;
 304
 305                         case CHANNEL_NO:
 306                         break;
 307
 308                         default:
 309                         if (selchannel->channel<1 || selchannel->channel==16)
 310                                 break;
 311                         i = selchannel->channel-1-(selchannel->channel>=17);
 312                         if (i >= mISDNport->b_num)
 313                                 break;
 314                         port = mISDNport->b_port[i];
 315                         if (!port)
 316                                 break;
 317                         if (port->p_type == PORT_TYPE_SS5_IN || port->p_type == PORT_TYPE_SS5_OUT)
 318                                 PDEBUG(DEBUG_SS5, "Checking port %s: channel %d not available, because port not idle type.\n",
 319                                         mISDNport->name, i);
 320                         if (port->p_type != PORT_TYPE_SS5_IDLE)
 321                                 break;
 322                         ss5port = (class Pss5 *)port;
 323                         /* is really idle ? */
 324                         if (ss5port->p_state == PORT_STATE_IDLE
 325                          && ss5port->p_m_s_state == SS5_STATE_IDLE)
 326                                 return ss5port;
 327                         PDEBUG(DEBUG_SS5, "Checking port %s: channel %d not available, because p_state=%d, ss5_state=%d.\n",
 328                                 mISDNport->name, i, ss5port->p_state,ss5port->p_m_s_state);
 329                 }
 330                 selchannel = selchannel->next;
 331         }
 332         PDEBUG(DEBUG_SS5, "no free interface in channel list\n");
 333         return NULL;
 334 }
 335
 336
 337 /*
 338  * constructor
 339  */
 340 Pss5::Pss5(int type, struct mISDNport *mISDNport, char *portname, struct port_settings *settings, int channel, int exclusive, int mode) : PmISDN(type, mISDNport, portname, settings, channel, exclusive, mode)
 341 {
 342         p_callerinfo.itype = (mISDNport->ifport->interface->extension)?INFO_ITYPE_ISDN_EXTENSION:INFO_ITYPE_ISDN;
 343         p_m_s_state = SS5_STATE_IDLE;
 344         p_m_s_signal = SS5_SIGNAL_NULL;
 345         p_m_s_dial[0] = '\0';
 346         p_m_s_digit_i = 0;
 347         p_m_s_pulsecount = 0;
 348         p_m_s_last_digit = ' ';
 349         p_m_s_signal_loss = 0;
 350         p_m_s_decoder_count = 0;
 351         //p_m_s_decoder_buffer;
 352         p_m_s_sample_nr = 0;
 353         p_m_s_recog = 0;
 354         p_m_s_timer = 0.0;
 355         p_m_s_timer_fn = NULL;
 356         p_m_s_answer = 0;
 357         p_m_s_busy_flash = 0;
 358         p_m_s_clear_back = 0;
 359         memset(p_m_s_delay_digits, ' ', sizeof(p_m_s_delay_digits));
 360         memset(p_m_s_delay_mute, ' ', sizeof(p_m_s_delay_mute));
 361
 362         /* turn on signalling receiver */
 363         inband_receive_on();
 364
 365         PDEBUG(DEBUG_SS5, "Created new mISDNPort(%s). Currently %d objects use.\n", portname, mISDNport->use);
 366 }
 367
 368
 369 /*
 370  * destructor
 371  */
 372 Pss5::~Pss5()
 373 {
 374 }
 375
 376
 377 /*
 378  * change ss5 states
 379  */
 380 void Pss5::_new_ss5_state(int state, const char *func, int line)
 381 {
 382         PDEBUG(DEBUG_SS5, "%s(%s:%d): changing SS5 state from %s to %s\n", p_name, func, line, ss5_state_name[p_m_s_state], ss5_state_name[state]);
 383         p_m_s_state = state;
 384         p_m_s_signal = SS5_SIGNAL_NULL;
 385 }
 386 void Pss5::_new_ss5_signal(int signal, const char *func, int line)
 387 {
 388         if (p_m_s_signal)
 389                 PDEBUG(DEBUG_SS5, "%s(%s:%d): changing SS5 signal state from %s to %s\n", p_name, func, line, ss5_signal_name[p_m_s_signal], ss5_signal_name[signal]);
 390         else
 391                 PDEBUG(DEBUG_SS5, "%s(%s:%d): changing SS5 signal state to %s\n", p_name, func, line, ss5_signal_name[signal]);
 392         p_m_s_signal = signal;
 393 }
 394
 395
 396 /*
 397  * signalling receiver
 398  *
 399  * this function will be called for every audio received.
 400  */
 401 void Pss5::inband_receive(unsigned char *buffer, int len)
 402 {
 403         int count = 0, tocopy, space;
 404         char digit;
 405
 406         again:
 407         /* how much to copy ? */
 408         tocopy = len - count;
 409         space = SS5_DECODER_NPOINTS - p_m_s_decoder_count;
 410         if (space < 0)
 411                 FATAL("p_m_s_decoder_count overflows\n");
 412         if (space < tocopy)
 413                 tocopy = space;
 414         /* copy an count */
 415         memcpy(p_m_s_decoder_buffer+p_m_s_decoder_count, buffer+count, tocopy);
 416         p_m_s_decoder_count += tocopy;
 417         count += tocopy;
 418         /* decoder buffer not completely filled ? */
 419         if (tocopy < space)
 420                 return;
 421
 422         /* decode one frame */
 423         digit = ss5_decode(p_m_s_decoder_buffer, SS5_DECODER_NPOINTS);
 424         p_m_s_decoder_count = 0;
 425
 426 #ifdef DEBUG_DETECT
 427         if (p_m_s_last_digit != digit && digit != ' ')
 428                 PDEBUG(DEBUG_SS5, "%s: detecting signal '%c' start (state=%s signal=%s)\n", p_name, digit, ss5_state_name[p_m_s_state], ss5_signal_name[p_m_s_signal]);
 429 #endif
 430
 431         /* ignore short loss of signal */
 432         if (p_m_s_signal_loss) {
 433                 if (digit == ' ') {
 434                         /* still lost */
 435                         if (p_m_s_signal_loss >= SS5_TIMER_SIGNAL_LOSS) {
 436 #ifdef DEBUG_DETECT
 437                                 PDEBUG(DEBUG_SS5, "%s: signal '%c' lost too long\n", p_name, p_m_s_last_digit);
 438 #endif
 439                                 /* long enough, we stop loss-timer */
 440                                 p_m_s_signal_loss = 0;
 441                         } else {
 442                                 /* not long enough, so we use last signal */
 443                                 p_m_s_signal_loss += SS5_DECODER_NPOINTS;
 444                                 digit = p_m_s_last_digit;
 445                         }
 446                 } else {
 447                         /* signal is back, we stop timer and store */
 448 #ifdef DEBUG_DETECT
 449                         PDEBUG(DEBUG_SS5, "%s: signal '%c' lost, but continues with '%c'\n", p_name, p_m_s_last_digit, digit);
 450 #endif
 451                         p_m_s_signal_loss = 0;
 452                         p_m_s_last_digit = digit;
 453                 }
 454         } else {
 455                 if (p_m_s_last_digit != ' ' && digit == ' ') {
 456 #ifdef DEBUG_DETECT
 457                         PDEBUG(DEBUG_SS5, "%s: signal '%c' lost\n", p_name, p_m_s_last_digit);
 458 #endif
 459                         /* restore last digit until signal is really lost */
 460                         p_m_s_last_digit = digit;
 461                         /* starting to loose signal */
 462                         p_m_s_signal_loss = SS5_DECODER_NPOINTS;
 463                 } else {
 464                         /* storing last signal, in case it is lost */
 465                         p_m_s_last_digit = digit;
 466                 }
 467         }
 468
 469         /* update mute */
 470         if ((p_m_mISDNport->ss5 & SS5_FEATURE_SUPPRESS)) {
 471                 int mdigit;
 472                 memcpy(p_m_s_delay_mute, p_m_s_delay_mute+1, sizeof(p_m_s_delay_mute)-1);
 473                 p_m_s_delay_mute[sizeof(p_m_s_delay_mute)-1] = digit;
 474                 mdigit = p_m_s_delay_mute[0];
 475                 if (p_m_mute) {
 476                         /* mute is on */
 477                         if (mdigit != 'A' && mdigit != 'B' && mdigit != 'C')
 478                                 mute_off();
 479                 } else {
 480                         /* mute is off */
 481                         if (mdigit == 'A' || mdigit == 'B' || mdigit == 'C')
 482                                 mute_on();
 483                 }
 484         }
 485
 486         /* delay decoded tones */
 487         if ((p_m_mISDNport->ss5 & SS5_FEATURE_DELAY)) {
 488                 /* shift buffer */
 489                 memcpy(p_m_s_delay_digits, p_m_s_delay_digits+1, sizeof(p_m_s_delay_digits)-1);
 490                 /* first in */
 491                 p_m_s_delay_digits[sizeof(p_m_s_delay_digits)-1] = digit;
 492                 /* first out */
 493                 digit = p_m_s_delay_digits[0];
 494         }
 495
 496         /* clear forward is always recognized */
 497         if (digit == 'C' && p_m_s_state != SS5_STATE_CLEAR_FORWARD && p_m_s_state != SS5_STATE_RELEASE_GUARD) {
 498                 switch (p_type) {
 499                         case PORT_TYPE_SS5_OUT:
 500                         PDEBUG(DEBUG_SS5, "%s: received release-guard, waiting for recognition\n", p_name);
 501                         break;
 502                         case PORT_TYPE_SS5_IN:
 503                         PDEBUG(DEBUG_SS5, "%s: received clear-forward, waiting for recognition\n", p_name);
 504                         break;
 505                         default:
 506                         PDEBUG(DEBUG_SS5, "%s: received clear-forward in idle state, waiting for recognition\n", p_name);
 507                         break;
 508                 }
 509                 new_state(PORT_STATE_RELEASE);
 510                 new_ss5_state(SS5_STATE_RELEASE_GUARD);
 511                 new_ss5_signal(SS5_SIGNAL_RECEIVE_RECOG);
 512                 p_m_s_recog = 0;
 513         } else
 514         switch(p_m_s_state) {
 515                 case SS5_STATE_IDLE:
 516                 /* seizing only recognized in port idle state */
 517                 if (p_state == PORT_STATE_IDLE) {
 518                         if (digit != 'A')
 519                                 break;
 520                         seize:
 521                         PDEBUG(DEBUG_SS5, "%s: received seize, waiting for recognition\n", p_name);
 522                         p_type = PORT_TYPE_SS5_IN;
 523                         new_ss5_state(SS5_STATE_PROCEED_TO_SEND);
 524                         new_ss5_signal(SS5_SIGNAL_RECEIVE_RECOG);
 525                         p_m_s_recog = 0;
 526                         break;
 527                 }
 528                 /* other signals */
 529                 if (digit == 'A') {
 530                         if (p_type != PORT_TYPE_SS5_OUT)
 531                                 break;
 532                         PDEBUG(DEBUG_SS5, "%s: received answer, waiting for recognition\n", p_name);
 533                         new_ss5_state(SS5_STATE_ACK_ANSWER);
 534                         new_ss5_signal(SS5_SIGNAL_RECEIVE_RECOG);
 535                         p_m_s_recog = 0;
 536                         break;
 537                 }
 538                 if (digit == 'B') {
 539                         if (p_type == PORT_TYPE_SS5_IN) {
 540                                 if ((p_m_mISDNport->ss5 & SS5_FEATURE_BELL)) {
 541                                         new_ss5_state(SS5_STATE_DIAL_IN_PULSE); /* go pulsing state */
 542                                         new_ss5_signal(SS5_SIGNAL_PULSE_OFF); /* we are starting with pulse off */
 543                                         p_m_s_pulsecount = 0; /* init pulse counter */
 544                                         p_m_s_dial[0] = '\0'; /* init dial string */
 545                                         pulse_ind(1); /* also inits recogition timer... */
 546                                         break;
 547                                 }
 548                                 PDEBUG(DEBUG_SS5, "%s: received forward-transfer, waiting for recognition\n", p_name);
 549                                 /* forward transfer on incomming lines */
 550                                 new_ss5_state(SS5_STATE_FORWARD_TRANSFER);
 551                                 new_ss5_signal(SS5_SIGNAL_RECEIVE_RECOG);
 552                                 p_m_s_recog = 0;
 553                                 break;
 554                         }
 555                         if (p_state == PORT_STATE_CONNECT) {
 556                                 PDEBUG(DEBUG_SS5, "%s: received clear-back, waiting for recognition\n", p_name);
 557                                 new_ss5_state(SS5_STATE_ACK_CLEAR_BACK);
 558                         } else {
 559                                 PDEBUG(DEBUG_SS5, "%s: received busy-flash, waiting for recognition\n", p_name);
 560                                 new_ss5_state(SS5_STATE_ACK_BUSY_FLASH);
 561                         }
 562                         new_ss5_signal(SS5_SIGNAL_RECEIVE_RECOG);
 563                         p_m_s_recog = 0;
 564                         break;
 565                 }
 566                 /* dialing only allowed in incomming setup state */
 567                 if (p_state == PORT_STATE_IN_SETUP) {
 568                         if (!strchr("1234567890*#abc", digit))
 569                                 break;
 570                         PDEBUG(DEBUG_SS5, "%s: received dialing start with '%c'\n", p_name, digit);
 571                         new_ss5_state(SS5_STATE_DIAL_IN);
 572                         new_ss5_signal(SS5_SIGNAL_DIGIT_ON);
 573                         p_m_s_dial[0] = '\0';
 574                         digit_ind(digit);
 575                         break;
 576                 }
 577                 break;
 578                 /* sending seizing */
 579                 case SS5_STATE_SEIZING:
 580                 switch (p_m_s_signal) {
 581                         case SS5_SIGNAL_SEND_ON:
 582                         if (digit == 'A') { /* double seize */
 583                                 PDEBUG(DEBUG_SS5, "%s: received double seizure\n", p_name, digit);
 584                                 double_seizure_ind();
 585                                 break;
 586                         }
 587                         if (digit == 'B') {
 588                                 PDEBUG(DEBUG_SS5, "%s: received answer to outgoing seize, waiting for recognition\n", p_name);
 589                                 /* set recognition timer */
 590                                 new_ss5_signal(SS5_SIGNAL_SEND_ON_RECOG);
 591                                 p_m_s_recog = 0;
 592                         }
 593                         break;
 594                         case SS5_SIGNAL_SEND_ON_RECOG:
 595                         if (digit != 'B') { /* seize */
 596                                 PDEBUG(DEBUG_SS5, "%s: answer to outgoing seize is gone before recognition\n", p_name);
 597                                 new_ss5_signal(SS5_SIGNAL_SEND_ON);
 598 //                              p_m_s_sample_nr = 0;
 599 //                              inband_send_on();
 600                                 break;
 601                         }
 602                         p_m_s_recog += SS5_DECODER_NPOINTS;
 603                         if (p_m_s_recog < SS5_TIMER_RECOG_SEIZE)
 604                                 break;
 605                         PDEBUG(DEBUG_SS5, "%s: answer to outgoing seize recognized, turning off, waiting for recognition\n", p_name);
 606                         new_ss5_signal(SS5_SIGNAL_SEND_OFF);
 607                         break;
 608                         case SS5_SIGNAL_SEND_OFF:
 609                         if (digit == 'B')
 610                                 break;
 611                         PDEBUG(DEBUG_SS5, "%s: outgoing seizure is complete, proceeding...\n", p_name);
 612                         new_ss5_state(SS5_STATE_IDLE);
 613                         proceed_to_send_ind();
 614                         break;
 615                 }
 616                 break;
 617                 /* answer to seize */
 618                 case SS5_STATE_PROCEED_TO_SEND:
 619                 if (p_m_s_signal == SS5_SIGNAL_RECEIVE_RECOG) {
 620                         if (digit != 'A') {
 621                                 PDEBUG(DEBUG_SS5, "%s: incomming seize is gone before recognition\n", p_name);
 622                                 new_ss5_state(SS5_STATE_IDLE);
 623                                 p_type = PORT_TYPE_SS5_IDLE;
 624                                 break;
 625                         }
 626                         p_m_s_recog += SS5_DECODER_NPOINTS;
 627                         if (p_m_s_recog < SS5_TIMER_RECOG_SEIZE)
 628                                 break;
 629                         PDEBUG(DEBUG_SS5, "%s: incomming seize is recognized, responding...\n", p_name);
 630                         new_ss5_signal(SS5_SIGNAL_RECEIVE);
 631                         p_m_s_sample_nr = 0;
 632                         inband_send_on();
 633                         break;
 634                 }
 635                 if (digit != 'A') {
 636                         PDEBUG(DEBUG_SS5, "%s: incomming seize is gone after responding\n", p_name);
 637                         new_ss5_state(SS5_STATE_IDLE);
 638                         seizing_ind();
 639                 }
 640                 break;
 641                 /* sending busy flash / answer / clear-back */
 642                 case SS5_STATE_BUSY_FLASH:
 643                 case SS5_STATE_ANSWER:
 644                 case SS5_STATE_CLEAR_BACK:
 645                 switch (p_m_s_signal) {
 646                         case SS5_SIGNAL_SEND_ON:
 647                         if (digit == 'A') {
 648                                 PDEBUG(DEBUG_SS5, "%s: received acknowledge, waiting for recognition\n", p_name);
 649                                 /* set recognition timer */
 650                                 new_ss5_signal(SS5_SIGNAL_SEND_ON_RECOG);
 651                                 p_m_s_recog = 0;
 652                         }
 653                         break;
 654                         case SS5_SIGNAL_SEND_ON_RECOG:
 655                         if (digit != 'A') {
 656                                 PDEBUG(DEBUG_SS5, "%s: acknowledge is gone before recognition\n", p_name);
 657                                 new_ss5_signal(SS5_SIGNAL_SEND_ON);
 658 //                              p_m_s_sample_nr = 0;
 659 //                              inband_send_on();
 660                                 break;
 661                         }
 662                         p_m_s_recog += SS5_DECODER_NPOINTS;
 663                         if (p_m_s_recog < SS5_TIMER_RECOG_OTHER)
 664                                 break;
 665                         PDEBUG(DEBUG_SS5, "%s: acknowledge recognized, turning off, waiting for recognition\n", p_name);
 666                         new_ss5_signal(SS5_SIGNAL_SEND_OFF);
 667                         break;
 668                         case SS5_SIGNAL_SEND_OFF:
 669                         if (digit == 'A')
 670                                 break;
 671                         PDEBUG(DEBUG_SS5, "%s: outgoing signal is complete\n", p_name);
 672                         new_ss5_state(SS5_STATE_IDLE);
 673                         break;
 674                 }
 675                 break;
 676                 /* answer to busy-flash / clear back */
 677                 case SS5_STATE_ACK_BUSY_FLASH:
 678                 case SS5_STATE_ACK_CLEAR_BACK:
 679                 if (p_m_s_signal == SS5_SIGNAL_RECEIVE_RECOG) {
 680                         if (digit != 'B') {
 681                                 PDEBUG(DEBUG_SS5, "%s: incomming clear-back/busy-flash is gone before recognition\n", p_name);
 682                                 new_ss5_state(SS5_STATE_IDLE);
 683                                 break;
 684                         }
 685                         p_m_s_recog += SS5_DECODER_NPOINTS;
 686                         if (p_m_s_recog < SS5_TIMER_RECOG_OTHER)
 687                                 break;
 688                         PDEBUG(DEBUG_SS5, "%s: incomming clear-back/busy-flash is recognized, responding...\n", p_name);
 689                         new_ss5_signal(SS5_SIGNAL_RECEIVE);
 690                         p_m_s_sample_nr = 0;
 691                         inband_send_on();
 692                         break;
 693                 }
 694                 if (digit != 'B') {
 695                         PDEBUG(DEBUG_SS5, "%s: incomming clear-back/busy-flash is gone after responding\n", p_name);
 696                         new_ss5_state(SS5_STATE_IDLE);
 697                         if (p_m_s_state == SS5_STATE_ACK_BUSY_FLASH)
 698                                 busy_flash_ind();
 699                         else
 700                                 clear_back_ind();
 701                 }
 702                 break;
 703                 /* answer to answer */
 704                 case SS5_STATE_ACK_ANSWER:
 705                 if (p_m_s_signal == SS5_SIGNAL_RECEIVE_RECOG) {
 706                         if (digit != 'A') {
 707                                 PDEBUG(DEBUG_SS5, "%s: incomming answer is gone before recognition\n", p_name);
 708                                 new_ss5_state(SS5_STATE_IDLE);
 709                                 break;
 710                         }
 711                         p_m_s_recog += SS5_DECODER_NPOINTS;
 712                         if (p_m_s_recog < SS5_TIMER_RECOG_OTHER)
 713                                 break;
 714                         PDEBUG(DEBUG_SS5, "%s: incomming answer is recognized, responding...\n", p_name);
 715                         new_ss5_signal(SS5_SIGNAL_RECEIVE);
 716                         p_m_s_sample_nr = 0;
 717                         inband_send_on();
 718                         break;
 719                 }
 720                 if (digit != 'A') {
 721                         PDEBUG(DEBUG_SS5, "%s: incomming answer is gone after responding\n", p_name);
 722                         new_ss5_state(SS5_STATE_IDLE);
 723                         answer_ind();
 724                 }
 725                 break;
 726                 /* sending clear-forward */
 727                 case SS5_STATE_CLEAR_FORWARD:
 728                 switch (p_m_s_signal) {
 729                         case SS5_SIGNAL_SEND_ON:
 730                         if (digit == 'C') {
 731                                 PDEBUG(DEBUG_SS5, "%s: received answer to clear-forward, waiting for recognition\n", p_name);
 732                                 /* set recognition timer */
 733                                 new_ss5_signal(SS5_SIGNAL_SEND_ON_RECOG);
 734                                 p_m_s_recog = 0;
 735                         }
 736                         break;
 737                         case SS5_SIGNAL_SEND_ON_RECOG:
 738                         if (digit != 'C') {
 739                                 PDEBUG(DEBUG_SS5, "%s: answer to clear-forward is gone before recognition\n", p_name);
 740                                 new_ss5_signal(SS5_SIGNAL_SEND_ON);
 741 //                              p_m_s_sample_nr = 0;
 742 //                              inband_send_on();
 743                                 break;
 744                         }
 745                         p_m_s_recog += SS5_DECODER_NPOINTS;
 746                         if (p_m_s_recog < SS5_TIMER_RECOG_OTHER)
 747                                 break;
 748                         PDEBUG(DEBUG_SS5, "%s: answer to clear-forward recognized, turning off, waiting for recognition\n", p_name);
 749                         new_ss5_signal(SS5_SIGNAL_SEND_OFF);
 750                         break;
 751                         case SS5_SIGNAL_SEND_OFF:
 752                         if (digit == 'A') {
 753                                 PDEBUG(DEBUG_SS5, "%s: received seize right after clear-forward answer, continue with seize\n", p_name);
 754                                 new_state(PORT_STATE_IDLE);
 755                                 goto seize;
 756                         }
 757                         if (digit == 'C')
 758                                 break;
 759                         PDEBUG(DEBUG_SS5, "%s: answer to clear-forward is complete\n", p_name);
 760                         release_guard_ind();
 761                         new_ss5_signal(SS5_SIGNAL_DELAY);
 762                         p_m_s_recog = 0; /* use recog to delay */
 763                         PDEBUG(DEBUG_SS5, "%s: answer to clear-forward on outgoing interface starting delay to prevent ping-pong\n", p_name);
 764                         break;
 765                         case SS5_SIGNAL_DELAY:
 766                         if (digit == 'A') {
 767                                 PDEBUG(DEBUG_SS5, "%s: received seize right after clear-forward answer, continue with seize\n", p_name);
 768                                 new_state(PORT_STATE_IDLE);
 769                                 goto seize;
 770                         }
 771                         p_m_s_recog += SS5_DECODER_NPOINTS;
 772                         if (p_m_s_recog < SS5_TIMER_RELEASE_DELAY)
 773                                 break;
 774                         PDEBUG(DEBUG_SS5, "%s: delay time over, going idle\n", p_name);
 775                         new_ss5_state(SS5_STATE_IDLE);
 776                         new_state(PORT_STATE_IDLE);
 777                         p_type = PORT_TYPE_SS5_IDLE;
 778                         break;
 779                 }
 780                 break;
 781                 /* answer to release-guard*/
 782                 case SS5_STATE_RELEASE_GUARD:
 783                 switch (p_m_s_signal) {
 784                         case SS5_SIGNAL_RECEIVE_RECOG:
 785                         if (digit != 'C') {
 786                                 if (p_type == PORT_TYPE_SS5_OUT)
 787                                         PDEBUG(DEBUG_SS5, "%s: incomming release-guard is gone before recognition\n", p_name);
 788                                 else
 789                                         PDEBUG(DEBUG_SS5, "%s: incomming clear forward is gone before recognition\n", p_name);
 790                                 new_ss5_state(SS5_STATE_IDLE);
 791                                 break;
 792                         }
 793                         p_m_s_recog += SS5_DECODER_NPOINTS;
 794                         if (p_m_s_recog < SS5_TIMER_RECOG_OTHER)
 795                                 break;
 796                         if (p_type == PORT_TYPE_SS5_OUT)
 797                                 PDEBUG(DEBUG_SS5, "%s: incomming release-guard is recognized, responding...\n", p_name);
 798                         else
 799                                 PDEBUG(DEBUG_SS5, "%s: incomming clear-forward is recognized, responding...\n", p_name);
 800                         new_ss5_signal(SS5_SIGNAL_RECEIVE);
 801                         p_m_s_sample_nr = 0;
 802                         inband_send_on();
 803                         break;
 804                         case SS5_SIGNAL_RECEIVE:
 805                         if (digit == 'C'
 806                          || p_m_s_sample_nr < 256) /* small hack to keep answer for at least some time */
 807                          break;
 808 #if 0
 809                         if (digit == 'A') {
 810                                 PDEBUG(DEBUG_SS5, "%s: received seize right after clear-forward is received\n", p_name);
 811                                 new_state(PORT_STATE_IDLE);
 812                                 goto seize;
 813                         }
 814 #endif
 815                         /* if clear forward stops right after recognition on the incomming side,
 816                          * the release guard signal stops and may be too short to be recognized at the outgoing side.
 817                          * to prevent this, a timer can be started to force a release guard that is long
 818                          * enough to be recognized on the outgoing side.
 819                          * this will prevent braking via blueboxing (other tricks may still be possible).
 820                          */
 821                         if ((p_m_mISDNport->ss5 & SS5_FEATURE_RELEASEGUARDTIMER)
 822                          && p_m_s_sample_nr < SS5_TIMER_RELEASE_GUARD)
 823                                 break;
 824                         if (p_type == PORT_TYPE_SS5_OUT)
 825                                 PDEBUG(DEBUG_SS5, "%s: incomming release-guard is gone after responding\n", p_name);
 826                         else
 827                                 PDEBUG(DEBUG_SS5, "%s: incomming clear-forward is gone after responding\n", p_name);
 828                         if (p_type == PORT_TYPE_SS5_OUT) {
 829                                 release_guard_ind();
 830                                 new_ss5_signal(SS5_SIGNAL_DELAY);
 831                                 p_m_s_recog = 0; /* use recog to delay */
 832                                 PDEBUG(DEBUG_SS5, "%s: incomming release-guard on outgoing interface starting delay to prevent ping-pong\n", p_name);
 833                         } else {
 834                                 clear_forward_ind();
 835                                 new_ss5_state(SS5_STATE_IDLE);
 836                         }
 837                         break;
 838                         case SS5_SIGNAL_DELAY:
 839                         if (digit == 'A') {
 840                                 PDEBUG(DEBUG_SS5, "%s: received seize right after release guard is gone, continue with seize\n", p_name);
 841                                 new_state(PORT_STATE_IDLE);
 842                                 goto seize;
 843                         }
 844                         p_m_s_recog += SS5_DECODER_NPOINTS;
 845                         if (p_m_s_recog < SS5_TIMER_RELEASE_DELAY)
 846                                 break;
 847                         PDEBUG(DEBUG_SS5, "%s: delay time over, going idle\n", p_name);
 848                         new_ss5_state(SS5_STATE_IDLE);
 849                         new_state(PORT_STATE_IDLE);
 850                         p_type = PORT_TYPE_SS5_IDLE;
 851                         break;
 852                 }
 853                 break;
 854                 /* wait time to recognize forward transfer */
 855                 case SS5_STATE_FORWARD_TRANSFER:
 856                 if (p_m_s_signal == SS5_SIGNAL_RECEIVE_RECOG) {
 857                         if (digit != 'B') {
 858                                 PDEBUG(DEBUG_SS5, "%s: incomming forward-transfer is gone before recognition\n", p_name);
 859                                 new_ss5_state(SS5_STATE_IDLE);
 860                                 break;
 861                         }
 862                         p_m_s_recog += SS5_DECODER_NPOINTS;
 863                         if (p_m_s_recog < SS5_TIMER_RECOG_OTHER)
 864                                 break;
 865                         PDEBUG(DEBUG_SS5, "%s: incomming forward-transfer is recognized, responding, if BELL feature was selected...\n", p_name);
 866                         new_ss5_signal(SS5_SIGNAL_RECEIVE);
 867 #if 0
 868                         p_m_s_sample_nr = 0;
 869                         inband_send_on();
 870 #endif
 871                         break;
 872                 }
 873                 if (digit != 'B') {
 874                         PDEBUG(DEBUG_SS5, "%s: incomming forward-transfer is gone after recognition\n", p_name);
 875                         new_ss5_state(SS5_STATE_IDLE);
 876                         forward_transfer_ind();
 877                         break;
 878                 }
 879                 break;
 880                 /* dialing is received */
 881                 case SS5_STATE_DIAL_IN:
 882                 if (strchr("1234567890*#abc", digit)) {
 883                         if (p_m_s_signal != SS5_SIGNAL_DIGIT_PAUSE)
 884                                 break;
 885                         PDEBUG(DEBUG_SS5, "%s: incomming digit '%c' is recognized\n", p_name, digit);
 886                         new_ss5_signal(SS5_SIGNAL_DIGIT_ON);
 887                         digit_ind(digit);
 888                 } else {
 889                         if (p_m_s_signal != SS5_SIGNAL_DIGIT_ON)
 890                                 break;
 891                         PDEBUG(DEBUG_SS5, "%s: incomming digit is gone after recognition\n", p_name);
 892                         new_ss5_signal(SS5_SIGNAL_DIGIT_PAUSE);
 893                 }
 894                 break;
 895                 case SS5_STATE_DIAL_IN_PULSE:
 896                 if (digit == 'B')
 897                         pulse_ind(1);
 898                 else
 899                         pulse_ind(0);
 900                 break;
 901         }
 902
 903         /* something more to decode ? */
 904         if (count != len)
 905                 goto again;
 906 }
 907
 908
 909 /*
 910  * signalling sender
 911  *
 912  * this function generates tones and assembles dial string with digits and pause
 913  * the result is sent to mISDN. it uses the ss5_encode() function.
 914  * except for dialing and forward-transfer, tones are continuous and will not change state.
 915  */
 916 int Pss5::inband_send(unsigned char *buffer, int len)
 917 {
 918         int count = 0; /* sample counter */
 919         int duration;
 920         char digit;
 921         int tocode, tosend;
 922
 923         switch(p_m_s_state) {
 924                 /* turn off transmitter in idle state */
 925                 case SS5_STATE_IDLE:
 926                 inband_send_off();
 927                 break;
 928
 929                 case SS5_STATE_SEIZING:
 930                 if (p_m_s_signal != SS5_SIGNAL_SEND_ON
 931                  && p_m_s_signal != SS5_SIGNAL_SEND_ON_RECOG)
 932                         break;
 933                 duration = -1; /* continuous */
 934                 digit = 'A';
 935                 send:
 936                 /* how much samples do we have left */
 937                 if (duration < 0)
 938                         tocode = len;
 939                 else
 940                         tocode = duration - p_m_s_sample_nr;
 941                 if (tocode > 0) {
 942                         if (tocode > len)
 943                                 tocode = len;
 944                         ss5_encode(buffer, tocode, digit, p_m_s_sample_nr);
 945                         /* increase counters */
 946                         p_m_s_sample_nr += tocode;
 947                         count += tocode;
 948                 }
 949                 /* more to come ? */
 950                 if (duration > 0 && p_m_s_sample_nr >= duration) {
 951                         PDEBUG(DEBUG_SS5, "%s: sending tone '%c' complete, starting delay\n", p_name, digit);
 952                         if (p_m_s_state == SS5_STATE_DOUBLE_SEIZE) {
 953                                 do_release(CAUSE_NOCHANNEL, LOCATION_BEYOND);
 954                                 break;
 955                         }
 956                         new_ss5_state(SS5_STATE_DELAY);
 957                         p_m_s_sample_nr = 0;
 958                 }
 959 #if 0
 960                 /* stop sending if too long */
 961                 if (duration < 0 && p_m_s_sample_nr >= SS5_TIMER_MAX_SIGNAL) {
 962                         PDEBUG(DEBUG_SS5, "%s: sending tone '%c' too long, stopping\n", p_name, digit);
 963                         inband_send_off();
 964                         break;
 965                 }
 966 #endif
 967                 break;
 968                 /* incomming seizing */
 969                 case SS5_STATE_PROCEED_TO_SEND:
 970                 if (p_m_s_signal != SS5_SIGNAL_RECEIVE)
 971                         break;
 972                 duration = -1; /* continuous */
 973                 digit = 'B';
 974                 goto send;
 975
 976                 case SS5_STATE_BUSY_FLASH:
 977                 case SS5_STATE_CLEAR_BACK:
 978                 if (p_m_s_signal != SS5_SIGNAL_SEND_ON
 979                  && p_m_s_signal != SS5_SIGNAL_SEND_ON_RECOG)
 980                         break;
 981                 duration = -1; /* continuous */
 982                 digit = 'B';
 983                 goto send;
 984
 985                 case SS5_STATE_ANSWER:
 986                 if (p_m_s_signal != SS5_SIGNAL_SEND_ON
 987                  && p_m_s_signal != SS5_SIGNAL_SEND_ON_RECOG)
 988                         break;
 989                 duration = -1; /* continuous */
 990                 digit = 'A';
 991                 goto send;
 992
 993                 case SS5_STATE_ACK_BUSY_FLASH:
 994                 case SS5_STATE_ACK_ANSWER:
 995                 case SS5_STATE_ACK_CLEAR_BACK:
 996                 if (p_m_s_signal != SS5_SIGNAL_RECEIVE)
 997                         break;
 998                 duration = -1; /* continuous */
 999                 digit = 'A';
1000                 goto send;
1001
1002 #if 0
1003                 case SS5_STATE_FORWARD_TRANSFER:
1004                 if (p_m_s_signal != SS5_SIGNAL_RECEIVE)
1005                         break;
1006                 /* only on bell systems continue and acknowledge tone */
1007                 if (!(p_m_mISDNport->ss5 & SS5_FEATURE_BELL))
1008                         break;
1009                 duration = SS5_TIMER_FORWARD;
1010                 digit = 'B';
1011                 goto send;
1012 #endif
1013
1014                 case SS5_STATE_CLEAR_FORWARD:
1015                 if (p_m_s_signal != SS5_SIGNAL_SEND_ON
1016                  && p_m_s_signal != SS5_SIGNAL_SEND_ON_RECOG)
1017                         break;
1018                 duration = -1; /* continuous */
1019                 digit = 'C';
1020                 goto send;
1021
1022                 case SS5_STATE_RELEASE_GUARD:
1023                 if (p_m_s_signal != SS5_SIGNAL_RECEIVE
1024                  && p_m_s_signal != SS5_SIGNAL_DELAY)
1025                         break;
1026                 /* prevent from sending release guard too long */
1027                 if (p_m_s_sample_nr >= SS5_TIMER_RELEASE_MAX)
1028                         break;
1029                 duration = -1; /* continuous */
1030                 digit = 'C';
1031                 goto send;
1032
1033                 case SS5_STATE_DIAL_OUT:
1034                 if ((p_m_mISDNport->ss5 & SS5_FEATURE_PULSEDIALING))
1035                         count = inband_dial_pulse(buffer, len, count);
1036                 else
1037                         count = inband_dial_mf(buffer, len, count);
1038                 break;
1039                 break;
1040
1041                 case SS5_STATE_DELAY:
1042                 tosend = len - count;
1043                 memset(buffer+count, audio_s16_to_law[0], tosend);
1044                 p_m_s_sample_nr += tosend;
1045                 count += tosend;
1046                 if (p_m_s_sample_nr >= SS5_TIMER_AFTER_SIGNAL) {
1047                         PDEBUG(DEBUG_SS5, "%s: delay done, ready for next signal\n", p_name);
1048                         new_ss5_state(SS5_STATE_IDLE);
1049                         inband_send_off();
1050                 }
1051                 break;
1052
1053                 case SS5_STATE_DOUBLE_SEIZE:
1054                 duration = SS5_TIMER_DOUBLE_SEIZE;
1055                 digit = 'A';
1056                 goto send;
1057
1058                 /* nothing to send */
1059                 default:
1060                 PERROR("inband signalling is turned on, but no signal is processed here.");
1061                 new_ss5_state(SS5_STATE_IDLE);
1062                 inband_send_off();
1063                 return 0;
1064         }
1065
1066         /* return (partly) filled buffer */
1067         return count;
1068 }
1069
1070
1071 int Pss5::inband_dial_mf(unsigned char *buffer, int len, int count)
1072 {
1073         int duration;
1074         int tocode, tosend;
1075         char digit;
1076
1077         /* dialing
1078          *
1079          * p_m_s_dial: digits to be dialed
1080          * p_m_s_digit_i: current digit counter
1081          * p_m_s_signal: current signal state
1082          * p_m_s_sample_nr: current sample number
1083          */
1084         again:
1085         /* get digit and duration */
1086         digit = p_m_s_dial[p_m_s_digit_i];
1087         if (!digit) { /* if end of string reached */
1088                 new_ss5_state(SS5_STATE_DELAY);
1089                 p_m_s_sample_nr = 0;
1090                 return count;
1091         }
1092         if (p_m_s_signal == SS5_SIGNAL_DIGIT_ON) {
1093                 if (!p_m_s_digit_i) // first digit
1094                         duration = SS5_TIMER_KP;
1095                 else
1096                         duration = SS5_TIMER_DIGIT;
1097         } else {
1098                 duration = SS5_TIMER_PAUSE;
1099         }
1100         /* end of digit/pause ? */
1101         if (p_m_s_sample_nr >= duration) {
1102                 p_m_s_sample_nr = 0;
1103                 if (p_m_s_signal == SS5_SIGNAL_DIGIT_PAUSE)
1104                         new_ss5_signal(SS5_SIGNAL_DIGIT_ON);
1105                 else {
1106                         new_ss5_signal(SS5_SIGNAL_DIGIT_PAUSE);
1107                         p_m_s_digit_i++;
1108                         goto again;
1109                 }
1110         }
1111         /* how much samples do we have left */
1112         tosend = len - count;
1113         tocode = duration - p_m_s_sample_nr;
1114         if (tocode < 0)
1115                 FATAL("sample_nr overrun duration");
1116         if (tosend < tocode)
1117                 tocode = tosend;
1118         /* digit or pause */
1119         if (p_m_s_signal == SS5_SIGNAL_DIGIT_PAUSE) {
1120                 memset(buffer+count, audio_s16_to_law[0], tocode);
1121 //              printf("coding pause %d bytes\n", tocode);
1122         } else {
1123                 ss5_encode(buffer+count, tocode, digit, p_m_s_sample_nr);
1124 //              printf("coding digit '%c' %d bytes\n", digit, tocode);
1125         }
1126         /* increase counters */
1127         p_m_s_sample_nr += tocode;
1128         count += tocode;
1129         /* can we take more ? */
1130         if (len != count)
1131                 goto again;
1132         return count;
1133 }
1134
1135
1136 int Pss5::inband_dial_pulse(unsigned char *buffer, int len, int count)
1137 {
1138         int tocode, tosend;
1139         int duration;
1140         char digit;
1141
1142         /* dialing
1143          *
1144          * p_m_s_dial: digits to be dialed
1145          * p_m_s_digit_i: current digit counter
1146          * p_m_s_signal: current signal state
1147          * p_m_s_sample_nr: current sample number
1148          */
1149         again:
1150         /* get digit */
1151         digit = p_m_s_dial[p_m_s_digit_i];
1152         if (!digit) { /* if end of string reached */
1153                 new_ss5_state(SS5_STATE_DELAY);
1154                 p_m_s_sample_nr = 0;
1155                 return count;
1156         }
1157         /* convert digit to pulse */
1158         switch (digit) {
1159                 case '1':
1160                 case '2':
1161                 case '3':
1162                 case '4':
1163                 case '5':
1164                 case '6':
1165                 case '7':
1166                 case '8':
1167                 case '9':
1168                 digit -= '0';
1169                 break;
1170                 case '0':
1171                 digit = 10;
1172                 break;
1173                 case '*':
1174                 digit = 11;
1175                 break;
1176                 case '#':
1177                 digit = 12;
1178                 break;
1179                 default:
1180                 p_m_s_digit_i++;
1181                 goto again;
1182         }
1183         /* get duration */
1184         if (p_m_s_signal == SS5_SIGNAL_DIGIT_ON) {
1185                 if (p_m_s_pulsecount & 1)
1186                         duration = BELL_TIMER_MAKE; /* loop closed */
1187                 else
1188                         duration = BELL_TIMER_BREAK; /* loop open, tone */
1189         } else {
1190                 duration = BELL_TIMER_PAUSE;
1191         }
1192         /* end of digit/pause ? */
1193         if (p_m_s_sample_nr >= duration) {
1194                 p_m_s_sample_nr = 0;
1195                 if (p_m_s_signal == SS5_SIGNAL_DIGIT_PAUSE) {
1196                         new_ss5_signal(SS5_SIGNAL_DIGIT_ON);
1197                         PDEBUG(DEBUG_SS5, "%s: starting pusling digit '%c'\n", p_name, digit);
1198                 } else {
1199                         p_m_s_pulsecount++; /* toggle pulse */
1200                         if (!(p_m_s_pulsecount & 1)) {
1201                                 /* pulse now on again, but if end is reached... */
1202                                 if (p_m_s_pulsecount == (digit<<1)) {
1203                                         new_ss5_signal(SS5_SIGNAL_DIGIT_PAUSE);
1204                                         p_m_s_pulsecount = 0;
1205                                         p_m_s_digit_i++;
1206                                         goto again;
1207                                 }
1208                         }
1209                 }
1210         }
1211         /* how much samples do we have left */
1212         tosend = len - count;
1213         tocode = duration - p_m_s_sample_nr;
1214         if (tocode < 0)
1215                 FATAL("sample_nr overrun duration");
1216         if (tosend < tocode)
1217                 tocode = tosend;
1218         /* digit or pause */
1219         if (p_m_s_signal == SS5_SIGNAL_DIGIT_PAUSE
1220          || (p_m_s_pulsecount&1)) /* ...or currently on and no pulse */
1221                 memset(buffer+count, audio_s16_to_law[0], tocode);
1222         else
1223                 ss5_encode(buffer+count, tocode, 'B', p_m_s_sample_nr);
1224         /* increase counters */
1225         p_m_s_sample_nr += tocode;
1226         count += tocode;
1227         /* can we take more ? */
1228         if (len != count)
1229                 goto again;
1230         return count;
1231 }
1232
1233
1234 /*
1235  * start signal
1236  */
1237 void Pss5::start_signal(int state)
1238 {
1239         PDEBUG(DEBUG_SS5, "%s: starting singal '%s'\n", p_name, ss5_state_name[state]);
1240         /* start signal */
1241         new_ss5_state(state);
1242         if (state == SS5_STATE_DIAL_OUT) {
1243                 p_m_s_digit_i = 0;
1244                 p_m_s_pulsecount = 0;
1245                 new_ss5_signal(SS5_SIGNAL_DIGIT_ON);
1246         } else
1247                 new_ss5_signal(SS5_SIGNAL_SEND_ON);
1248
1249         /* double seize must continue the current seize tone, so don't reset sample_nr */
1250         if (state != SS5_STATE_DOUBLE_SEIZE) {
1251                 /* (re)set sound phase to 0 */
1252                 p_m_s_sample_nr = 0;
1253         }
1254
1255         /* turn on inband transmitter */
1256         inband_send_on();
1257 }
1258
1259
1260 /*
1261  * handles all indications
1262  */
1263 void Pss5::seizing_ind(void)
1264 {
1265         ss5_trace_header(p_m_mISDNport, this, SS5_SEIZING_IND, p_m_b_channel);
1266         end_trace();
1267
1268         new_state(PORT_STATE_IN_SETUP);
1269 }
1270
1271 void Pss5::digit_ind(char digit)
1272 {
1273         int i;
1274         char string[128] = "", dial[128] = "";
1275         int dash, first_digit, last_was_digit;
1276
1277         /* add digit */
1278         SCCAT(p_m_s_dial, digit);
1279
1280         if (p_state == PORT_STATE_IN_SETUP)
1281                 new_state(PORT_STATE_IN_OVERLAP);
1282
1283         /* not last digit ? */
1284         if (digit != 'c')
1285                 return;
1286
1287         /* parse string */
1288         dash = 0; /* dash must be used next time */
1289         first_digit = 1;
1290         last_was_digit = 0;
1291         p_dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
1292         for (i = 0; p_m_s_dial[i]; i++) {
1293                 if (dash || (last_was_digit && (p_m_s_dial[i]<'0' || p_m_s_dial[i]>'9')))
1294                         SCCAT(string, '-');
1295                 dash = 0;
1296                 last_was_digit = 0;
1297                 switch(p_m_s_dial[i]) {
1298                         case '1':
1299                         case '2':
1300                         case '3':
1301                         case '4':
1302                         case '5':
1303                         case '6':
1304                         case '7':
1305                         case '8':
1306                         case '9':
1307                         case '0':
1308                         if (first_digit)
1309                                 dash = 1;
1310                         first_digit = 0;
1311                         last_was_digit = 1;
1312                         SCCAT(string, p_m_s_dial[i]);
1313                         SCCAT(dial, p_m_s_dial[i]);
1314                         break;
1315                         case '*':
1316                         SCAT(string, "C11");
1317                         SCCAT(dial, p_m_s_dial[i]);
1318                         dash = 1;
1319                         break;
1320                         case '#':
1321                         SCAT(string, "C12");
1322                         SCCAT(dial, p_m_s_dial[i]);
1323                         dash = 1;
1324                         break;
1325                         case 'a':
1326                         SCAT(string, "KP1");
1327                         SCCAT(dial, p_m_s_dial[i]);
1328                         dash = 1;
1329                         break;
1330                         case 'b':
1331                         SCAT(string, "KP2");
1332                         SCCAT(dial, p_m_s_dial[i]);
1333                         dash = 1;
1334                         break;
1335                         case 'c':
1336                         SCAT(string, "ST");
1337                         dash = 1;
1338                         break;
1339                         default:
1340                         break;
1341                 }
1342         }
1343         ss5_trace_header(p_m_mISDNport, this, SS5_DIALING_IND, p_m_b_channel);
1344         add_trace("string", NULL, "%s", string);
1345         add_trace("number", NULL, "%s", dial);
1346         end_trace();
1347         new_ss5_state(SS5_STATE_IDLE);
1348
1349         do_setup(dial);
1350         new_state(PORT_STATE_IN_PROCEEDING);
1351 }
1352
1353 void Pss5::pulse_ind(int on)
1354 {
1355         struct lcr_msg *message;
1356         char dial[3] = "a.";
1357
1358         if (p_m_s_signal == SS5_SIGNAL_PULSE_OFF) {
1359                 if (on) {
1360                         /* pulse turns on */
1361                         p_m_s_recog = 0;
1362                         new_ss5_signal(SS5_SIGNAL_PULSE_ON);
1363                         /* pulse turns of, count it */
1364                         p_m_s_pulsecount++;
1365                         PDEBUG(DEBUG_SS5, "%s: pulse turns on, counting\n", p_name);
1366                 } else {
1367                         /* pulse remains off */
1368                         p_m_s_recog += SS5_DECODER_NPOINTS;
1369                         /* not recognized end of digit, we wait... */
1370                         if (p_m_s_recog < BELL_TIMER_RECOG_END)
1371                                 return;
1372                         PDEBUG(DEBUG_SS5, "%s: pulse remains off, counted %d pulses\n", p_name, p_m_s_pulsecount);
1373                         if (p_m_s_pulsecount >= 12)
1374                                 dial[1] = '#';
1375                         else if (p_m_s_pulsecount == 11)
1376                                 dial[1] = '*';
1377                         else if (p_m_s_pulsecount == 10)
1378                                 dial[1] = '0';
1379                         else
1380                                 dial[1] = p_m_s_pulsecount + '0';
1381                         ss5_trace_header(p_m_mISDNport, this, SS5_DIALING_IND, p_m_b_channel);
1382                         add_trace("digit", NULL, "%s", dial+1);
1383                         add_trace("pulses", NULL, "%d", p_m_s_pulsecount);
1384                         end_trace();
1385                         /* special star release feature */
1386                         if ((p_m_mISDNport->ss5 & SS5_FEATURE_STAR_RELEASE) && dial[1] == '*') {
1387                                 ss5_trace_header(p_m_mISDNport, this, SS5_DIALING_IND, p_m_b_channel);
1388                                 add_trace("star", NULL, "releases call");
1389                                 end_trace();
1390                                 goto star_release;
1391                         }
1392                         if (p_state == PORT_STATE_IN_SETUP) {
1393                                 /* sending digit as setup */
1394                                 do_setup(dial); /* include 'a' == KP1 */
1395                                 new_state(PORT_STATE_IN_OVERLAP);
1396                         } else {
1397                                 /* sending digit as information */
1398                                 message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_INFORMATION);
1399                                 SCPY(message->param.information.id, dial+1);
1400                                 message_put(message);
1401                         }
1402                                 new_ss5_state(SS5_STATE_IDLE);
1403                         /* done rx pulses, return to idle */
1404                         new_ss5_state(SS5_STATE_IDLE);
1405                 }
1406         } else {
1407                 if (on) {
1408                         /* pulse remains on */
1409                         p_m_s_recog += SS5_DECODER_NPOINTS;
1410                 } else {
1411                         /* pulse turns off */
1412                         if (p_m_s_recog >= BELL_TIMER_RECOG_HANGUP) {
1413                                 PDEBUG(DEBUG_SS5, "%s: long pulse turns off, releasing\n", p_name);
1414                                 ss5_trace_header(p_m_mISDNport, this, SS5_DIALING_IND, p_m_b_channel);
1415                                 add_trace("longtone", NULL, "releases call");
1416                                 end_trace();
1417                                 star_release:
1418                                 /* long pulse is gone, release current connection, if any */
1419                                 while(p_epointlist) {
1420                                         message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
1421                                         message->param.disconnectinfo.location = LOCATION_BEYOND;
1422                                         message->param.disconnectinfo.cause = CAUSE_NORMAL;
1423                                         message_put(message);
1424                                         free_epointlist(p_epointlist);
1425                                 }
1426                                 set_tone("", NULL);
1427                                 /* return to setup state */
1428                                 new_state(PORT_STATE_IN_SETUP);
1429                                 new_ss5_state(SS5_STATE_IDLE);
1430                                 return;
1431                         }
1432                         PDEBUG(DEBUG_SS5, "%s: short pulse turns off, releasing\n", p_name);
1433                         p_m_s_recog = 0;
1434                         new_ss5_signal(SS5_SIGNAL_PULSE_OFF);
1435                 }
1436         }
1437 }
1438
1439 void Pss5::proceed_to_send_ind(void)
1440 {
1441         ss5_trace_header(p_m_mISDNport, this, SS5_PROCEED_TO_SEND_IND, p_m_b_channel);
1442         end_trace();
1443
1444         SCPY(p_m_s_dial, p_dialinginfo.id);
1445         start_signal(SS5_STATE_DIAL_OUT);
1446
1447         new_state(PORT_STATE_OUT_OVERLAP);
1448 }
1449
1450 void Pss5::busy_flash_ind(void)
1451 {
1452         struct lcr_msg *message;
1453
1454         ss5_trace_header(p_m_mISDNport, this, SS5_BUSY_FLASH_IND, p_m_b_channel);
1455         end_trace();
1456
1457         /* busy before dialing ? */
1458         if (!p_epointlist)
1459                 return;
1460
1461         if (!(p_m_mISDNport->ss5 & SS5_FEATURE_NODISCONNECT)) {
1462                 message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_DISCONNECT);
1463                 message->param.disconnectinfo.location = LOCATION_BEYOND;
1464                 message->param.disconnectinfo.cause = CAUSE_BUSY;
1465                 message_put(message);
1466         }
1467
1468         new_state(PORT_STATE_IN_DISCONNECT);
1469 }
1470
1471 void Pss5::answer_ind(void)
1472 {
1473         struct lcr_msg *message;
1474
1475         ss5_trace_header(p_m_mISDNport, this, SS5_ANSWER_IND, p_m_b_channel);
1476         end_trace();
1477
1478         /* answer before dialing ? */
1479         if (!p_epointlist)
1480                 return;
1481
1482         /* already connected */
1483         if (!(p_m_mISDNport->ss5 & SS5_FEATURE_CONNECT)) {
1484                 message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
1485                 message_put(message);
1486         }
1487
1488         new_state(PORT_STATE_CONNECT);
1489 }
1490
1491 void Pss5::forward_transfer_ind(void)
1492 {
1493 //      struct lcr_msg *message;
1494
1495         ss5_trace_header(p_m_mISDNport, this, SS5_FORWARD_TRANSFER_IND, p_m_b_channel);
1496         end_trace();
1497
1498 #if 0
1499         /* if BELL flavor bluebox flag is set, use it to seize a new line */
1500         if (!(p_m_mISDNport->ss5 & SS5_FEATURE_BELL))
1501                 return;
1502
1503         /* special BELL flavor hack to clear a line and seize a new one */
1504         while(p_epointlist) {
1505                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
1506                 message->param.disconnectinfo.location = LOCATION_BEYOND;
1507                 message->param.disconnectinfo.cause = CAUSE_NORMAL;
1508                 message_put(message);
1509                 free_epointlist(p_epointlist);
1510         }
1511         set_tone("", NULL);
1512         new_state(PORT_STATE_IN_SETUP);
1513 #endif
1514 }
1515
1516 void Pss5::clear_back_ind(void)
1517 {
1518         struct lcr_msg *message;
1519
1520         ss5_trace_header(p_m_mISDNport, this, SS5_CLEAR_BACK_IND, p_m_b_channel);
1521         end_trace();
1522
1523         /* nobody? */
1524         if (!p_epointlist)
1525                 return;
1526
1527         if (!(p_m_mISDNport->ss5 & SS5_FEATURE_NODISCONNECT)) {
1528                 message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_DISCONNECT);
1529                 message->param.disconnectinfo.location = LOCATION_BEYOND;
1530                 message->param.disconnectinfo.cause = CAUSE_NORMAL;
1531                 message_put(message);
1532         }
1533
1534         new_state(PORT_STATE_IN_DISCONNECT);
1535 }
1536
1537 void Pss5::clear_forward_ind(void)
1538 {
1539         struct lcr_msg *message;
1540
1541         ss5_trace_header(p_m_mISDNport, this, SS5_CLEAR_FORWARD_IND, p_m_b_channel);
1542         end_trace();
1543
1544         new_state(PORT_STATE_IDLE);
1545         set_tone("", NULL);
1546         p_type = PORT_TYPE_SS5_IDLE;
1547
1548         /* someone ? */
1549         if (!p_epointlist)
1550                 return;
1551
1552         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
1553         message->param.disconnectinfo.location = LOCATION_BEYOND;
1554         message->param.disconnectinfo.cause = CAUSE_NORMAL;
1555         message_put(message);
1556         free_epointlist(p_epointlist);
1557
1558 }
1559
1560 void Pss5::release_guard_ind(void)
1561 {
1562         struct lcr_msg *message;
1563
1564         ss5_trace_header(p_m_mISDNport, this, SS5_RELEASE_GUARD_IND, p_m_b_channel);
1565         end_trace();
1566
1567         set_tone("", NULL);
1568
1569         /* someone ? */
1570         if (!p_epointlist)
1571                 return;
1572
1573         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
1574         message->param.disconnectinfo.location = LOCATION_BEYOND;
1575         message->param.disconnectinfo.cause = CAUSE_NORMAL;
1576         message_put(message);
1577         free_epointlist(p_epointlist);
1578 }
1579
1580 void Pss5::double_seizure_ind(void)
1581 {
1582         ss5_trace_header(p_m_mISDNport, this, SS5_DOUBLE_SEIZURE_IND, p_m_b_channel);
1583         end_trace();
1584         ss5_trace_header(p_m_mISDNport, this, SS5_DOUBLE_SEIZURE_REQ, p_m_b_channel);
1585         end_trace();
1586
1587         /* start double seizure sequence, so remote exchange will recognize it */
1588         start_signal(SS5_STATE_DOUBLE_SEIZE);
1589 }
1590
1591
1592 /*
1593  * shuts down by sending a clear forward and releasing endpoint
1594  */
1595 void Pss5::do_release(int cause, int location)
1596 {
1597         struct lcr_msg *message;
1598
1599         /* sending release to endpoint */
1600         while(p_epointlist) {
1601                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
1602                 message->param.disconnectinfo.location = location;
1603                 message->param.disconnectinfo.cause = cause;
1604                 message_put(message);
1605                 free_epointlist(p_epointlist);
1606         }
1607
1608         /* start clear-forward */
1609         ss5_trace_header(p_m_mISDNport, this, SS5_CLEAR_FORWARD_REQ, p_m_b_channel);
1610         end_trace();
1611         start_signal(SS5_STATE_CLEAR_FORWARD);
1612
1613         new_state(PORT_STATE_RELEASE);
1614 }
1615
1616
1617 /*
1618  * create endpoint and send setup
1619  */
1620 void Pss5::do_setup(char *dial)
1621 {
1622         class Endpoint *epoint;
1623         struct lcr_msg *message;
1624
1625         SCPY(p_dialinginfo.id, dial);
1626         p_dialinginfo.sending_complete = 1;
1627         p_callerinfo.present = INFO_PRESENT_NOTAVAIL;
1628         p_callerinfo.screen = INFO_SCREEN_NETWORK;
1629         p_callerinfo.ntype = INFO_NTYPE_NOTPRESENT;
1630         p_callerinfo.isdn_port = p_m_portnum;
1631         SCPY(p_callerinfo.interface, p_m_mISDNport->ifport->interface->name);
1632
1633         p_capainfo.bearer_capa = INFO_BC_AUDIO;
1634         p_capainfo.bearer_info1 = (options.law=='a')?3:2;
1635         p_capainfo.bearer_mode = INFO_BMODE_CIRCUIT;
1636         p_capainfo.hlc = INFO_HLC_NONE;
1637         p_capainfo.exthlc = INFO_HLC_NONE;
1638         p_capainfo.source_mode = B_MODE_TRANSPARENT;
1639
1640         /* create endpoint */
1641         if (p_epointlist)
1642                 FATAL("Incoming call but already got an endpoint.\n");
1643         if (!(epoint = new Endpoint(p_serial, 0)))
1644                 FATAL("No memory for Endpoint instance\n");
1645         if (!(epoint->ep_app = new DEFAULT_ENDPOINT_APP(epoint, 0))) //incoming
1646                 FATAL("No memory for Endpoint Application instance\n");
1647         epointlist_new(epoint->ep_serial);
1648
1649         /* send setup message to endpoit */
1650         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_SETUP);
1651         message->param.setup.isdn_port = p_m_portnum;
1652         message->param.setup.port_type = p_type;
1653 //      message->param.setup.dtmf = !p_m_mISDNport->ifport->nodtmf;
1654         memcpy(&message->param.setup.dialinginfo, &p_dialinginfo, sizeof(struct dialing_info));
1655         memcpy(&message->param.setup.callerinfo, &p_callerinfo, sizeof(struct caller_info));
1656         memcpy(&message->param.setup.redirinfo, &p_redirinfo, sizeof(struct redir_info));
1657         memcpy(&message->param.setup.capainfo, &p_capainfo, sizeof(struct capa_info));
1658         message_put(message);
1659
1660 }
1661
1662
1663 /*
1664  * handler
1665  */
1666 int Pss5::handler(void)
1667 {
1668         int ret;
1669
1670         if ((ret = PmISDN::handler()))
1671                 return(ret);
1672
1673         /* handle timer */
1674         if (p_m_s_timer && p_m_s_timer < now) {
1675                 p_m_s_timer = 0.0;
1676                 (this->*(p_m_s_timer_fn))();
1677         }
1678
1679         /* if answer signal is queued */
1680         if (p_m_s_answer && p_m_s_state == SS5_STATE_IDLE) {
1681                 p_m_s_answer = 0;
1682                 /* start answer */
1683                 ss5_trace_header(p_m_mISDNport, this, SS5_ANSWER_REQ, p_m_b_channel);
1684                 end_trace();
1685                 start_signal(SS5_STATE_ANSWER);
1686         }
1687
1688         /* if busy-flash signal is queued */
1689         if (p_m_s_busy_flash && p_m_s_state == SS5_STATE_IDLE) {
1690                 p_m_s_busy_flash = 0;
1691                 /* start busy-flash */
1692                 ss5_trace_header(p_m_mISDNport, this, SS5_BUSY_FLASH_REQ, p_m_b_channel);
1693                 end_trace();
1694                 start_signal(SS5_STATE_BUSY_FLASH);
1695         }
1696
1697         /* if clear-back signal is queued */
1698         if (p_m_s_clear_back && p_m_s_state == SS5_STATE_IDLE) {
1699                 p_m_s_clear_back = 0;
1700                 /* start clear-back */
1701                 ss5_trace_header(p_m_mISDNport, this, SS5_CLEAR_BACK_REQ, p_m_b_channel);
1702                 end_trace();
1703                 start_signal(SS5_STATE_CLEAR_BACK);
1704         }
1705
1706         return(0);
1707 }
1708
1709
1710 /*
1711  * handles all messages from endpoint
1712  */
1713
1714 /* MESSAGE_SETUP */
1715 void Pss5::message_setup(unsigned int epoint_id, int message_id, union parameter *param)
1716 {
1717         struct lcr_msg *message;
1718         int i;
1719         char string[128] = "", dial[128] = "";
1720         int dash, first_digit, last_was_digit;
1721
1722         if (p_epointlist) {
1723                 PERROR("endpoint already exist.\n");
1724                 message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
1725                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
1726                 message->param.disconnectinfo.cause = CAUSE_UNSPECIFIED;
1727                 message_put(message);
1728                 return;
1729         }
1730
1731         /* copy setup infos to port */
1732         memcpy(&p_callerinfo, &param->setup.callerinfo, sizeof(p_callerinfo));
1733         memcpy(&p_dialinginfo, &param->setup.dialinginfo, sizeof(p_dialinginfo));
1734         memcpy(&p_capainfo, &param->setup.capainfo, sizeof(p_capainfo));
1735         memcpy(&p_redirinfo, &param->setup.redirinfo, sizeof(p_redirinfo));
1736         /* screen outgoing caller id */
1737         do_screen(1, p_callerinfo.id, sizeof(p_callerinfo.id), &p_callerinfo.ntype, &p_callerinfo.present, p_m_mISDNport->ifport->interface);
1738         do_screen(1, p_callerinfo.id2, sizeof(p_callerinfo.id2), &p_callerinfo.ntype2, &p_callerinfo.present2, p_m_mISDNport->ifport->interface);
1739
1740         /* parse dial string  */
1741         dash = 0; /* dash must be used next time */
1742         first_digit = 1;
1743         last_was_digit = 0;
1744         for (i = 0; p_dialinginfo.id[i]; i++) {
1745                 if (dash || (last_was_digit && (p_dialinginfo.id[i]<'0' || p_dialinginfo.id[i]>'9')))
1746                         SCCAT(string, '-');
1747                 dash = 0;
1748                 last_was_digit = 0;
1749                 switch(p_dialinginfo.id[i]) {
1750                         case '1':
1751                         case '2':
1752                         case '3':
1753                         case '4':
1754                         case '5':
1755                         case '6':
1756                         case '7':
1757                         case '8':
1758                         case '9':
1759                         case '0':
1760                         if (i && first_digit)
1761                                 dash = 1;
1762                         first_digit = 0;
1763                         last_was_digit = 1;
1764                         SCCAT(string, p_dialinginfo.id[i]);
1765                         SCCAT(dial, p_dialinginfo.id[i]);
1766                         break;
1767                         case '*':
1768                         SCAT(string, "C11");
1769                         SCCAT(dial, '*');
1770                         dash = 1;
1771                         break;
1772                         case '#':
1773                         SCAT(string, "C12");
1774                         SCCAT(dial, '#');
1775                         dash = 1;
1776                         break;
1777                         case 'a':
1778                         SCAT(string, "KP1");
1779                         SCCAT(dial, 'a');
1780                         dash = 1;
1781                         break;
1782                         case 'b':
1783                         SCAT(string, "KP2");
1784                         SCCAT(dial, 'b');
1785                         dash = 1;
1786                         break;
1787                         case 'c':
1788                         SCAT(string, "ST");
1789                         SCCAT(dial, 'c');
1790                         dash = 1;
1791                         case 'K':
1792                         i++;
1793                         if (p_dialinginfo.id[i] != 'P')
1794                                 goto dial_error;
1795                         i++;
1796                         if (p_dialinginfo.id[i] == '1') {
1797                                 SCAT(string, "KP1");
1798                                 SCCAT(dial, 'a');
1799                                 dash = 1;
1800                                 break;
1801                         }
1802                         if (p_dialinginfo.id[i] == '2') {
1803                                 SCAT(string, "KP2");
1804                                 SCCAT(dial, 'b');
1805                                 dash = 1;
1806                                 break;
1807                         }
1808                         goto dial_error;
1809                         case 'C':
1810                         i++;
1811                         if (p_dialinginfo.id[i] != '1')
1812                                 goto dial_error;
1813                         i++;
1814                         if (p_dialinginfo.id[i] == '1') {
1815                                 SCAT(string, "C11");
1816                                 SCCAT(dial, 'a');
1817                                 dash = 1;
1818                                 break;
1819                         }
1820                         if (p_dialinginfo.id[i] == '2') {
1821                                 SCAT(string, "C12");
1822                                 SCCAT(dial, 'b');
1823                                 dash = 1;
1824                                 break;
1825                         }
1826                         goto dial_error;
1827                         case 'S':
1828                         i++;
1829                         if (p_dialinginfo.id[i] != 'T')
1830                                 goto dial_error;
1831                         SCAT(string, "ST");
1832                         SCCAT(dial, 'c');
1833                         dash = 1;
1834                         break;
1835                         default:
1836                         break;
1837                 }
1838                 /* stop, if ST */
1839                 if (dial[0] && dial[strlen(dial)-1] == 'c')
1840                         break;
1841         }
1842         /* terminate */
1843         if (dial[0] && dial[strlen(dial)-1]!='c') {
1844                 SCCAT(string, '-');
1845                 SCAT(string, "ST");
1846                 SCCAT(dial, 'c');
1847         }
1848
1849         /* error in dial string */
1850         if (!dial[0]) {
1851                 dial_error:
1852                 ss5_trace_header(p_m_mISDNport, this, SS5_DIALING_REQ, p_m_b_channel);
1853                 add_trace("string", NULL, "%s", p_dialinginfo.id);
1854                 if (!dial[0])
1855                         add_trace("error", NULL, "no number", dial);
1856                 else if (dial[0]!='a' && dial[0]!='b')
1857                         add_trace("error", NULL, "number must start with KP1/KP2", dial);
1858                 else
1859                         add_trace("error", NULL, "illegal format", dial);
1860                 end_trace();
1861                 message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
1862                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
1863                 message->param.disconnectinfo.cause = CAUSE_INVALID;
1864                 message_put(message);
1865                 return;
1866         }
1867
1868         /* copy new dial string */
1869         SCPY(p_dialinginfo.id, dial);
1870
1871         /* attach only if not already */
1872         epointlist_new(epoint_id);
1873
1874         ss5_trace_header(p_m_mISDNport, this, SS5_DIALING_REQ, p_m_b_channel);
1875         add_trace("string", NULL, "%s", string);
1876         add_trace("type", NULL, "%s", (dial[0]=='b')?"international":"national");
1877         add_trace("number", NULL, "%s", dial);
1878         end_trace();
1879         /* connect auto path */
1880         if ((p_m_mISDNport->ss5 & SS5_FEATURE_CONNECT)) {
1881                 message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
1882                 message_put(message);
1883         } else {
1884                 message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
1885                 message_put(message);
1886         }
1887
1888         /* start seizing */
1889         ss5_trace_header(p_m_mISDNport, this, SS5_SEIZING_REQ, p_m_b_channel);
1890         end_trace();
1891         new_ss5_state(SS5_STATE_SEIZING);
1892         new_ss5_signal(SS5_SIGNAL_SEND_ON);
1893         p_m_s_sample_nr = 0;
1894         inband_send_on();
1895
1896         p_type = PORT_TYPE_SS5_OUT;
1897         new_state(PORT_STATE_OUT_SETUP);
1898 }
1899
1900 /* MESSAGE_CONNECT */
1901 void Pss5::message_connect(unsigned int epoint_id, int message_id, union parameter *param)
1902 {
1903         memcpy(&p_connectinfo, &param->connectinfo, sizeof(p_connectinfo));
1904
1905         if (p_state != PORT_STATE_CONNECT) {
1906                 new_state(PORT_STATE_CONNECT);
1907                 p_m_s_answer = 1;
1908         }
1909
1910         set_tone("", NULL);
1911 }
1912
1913 /* MESSAGE_DISCONNECT */
1914 void Pss5::message_disconnect(unsigned int epoint_id, int message_id, union parameter *param)
1915 {
1916         /* disconnect and clear forward (release guard) */
1917 //      if ((p_type==PORT_TYPE_SS5_IN && !p_m_mISDNport->tones) /* incomming exchange with no tones */
1918 if (0    || p_type==PORT_TYPE_SS5_OUT) { /* outgoing exchange */
1919                 do_release(param->disconnectinfo.cause, param->disconnectinfo.location);
1920                 return;
1921         }
1922
1923         ss5_trace_header(p_m_mISDNport, this, SS5_CLEAR_BACK_REQ, p_m_b_channel);
1924         end_trace();
1925         start_signal(SS5_STATE_CLEAR_BACK);
1926
1927         new_state(PORT_STATE_OUT_DISCONNECT);
1928 }
1929
1930 /* MESSAGE_RELEASE */
1931 void Pss5::message_release(unsigned int epoint_id, int message_id, union parameter *param)
1932 {
1933         do_release(param->disconnectinfo.cause, param->disconnectinfo.location);
1934 }
1935
1936
1937 /*
1938  * endpoint sends messages to the port
1939  */
1940 int Pss5::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
1941 {
1942         if (PmISDN::message_epoint(epoint_id, message_id, param))
1943                 return(1);
1944
1945         switch(message_id) {
1946                 case MESSAGE_SETUP: /* dial-out command received from epoint */
1947                 if (p_state!=PORT_STATE_IDLE) {
1948                         PERROR("Pss5(%s) ignoring setup because isdn port is not in idle state (or connected for sending display info).\n", p_name);
1949                         break;
1950                 }
1951                 if (p_epointlist && p_state==PORT_STATE_IDLE)
1952                         FATAL("Pss5(%s): epoint pointer is set in idle state, how bad!!\n", p_name);
1953                 message_setup(epoint_id, message_id, param);
1954                 break;
1955
1956                 case MESSAGE_CONNECT: /* call of endpoint is connected */
1957                 message_connect(epoint_id, message_id, param);
1958                 break;
1959
1960                 case MESSAGE_DISCONNECT: /* call has been disconnected */
1961                 message_disconnect(epoint_id, message_id, param);
1962                 break;
1963
1964                 case MESSAGE_RELEASE: /* release isdn port */
1965                 message_release(epoint_id, message_id, param);
1966                 break;
1967
1968                 default:
1969                 PDEBUG(DEBUG_SS5, "Pss5(%s) ss5 port with (caller id %s) received an unhandled message: %d\n", p_name, p_callerinfo.id, message_id);
1970         }
1971
1972         return(1);
1973 }
1974