channels/chan_vpb.c

   1 /*
   2  * Asterisk -- A telephony toolkit for Linux.
   3  *
   4  * VoiceTronix Interface driver
   5  *
   6  * Copyright (C) 2003, Paul Bagyenda
   7  *
   8  * Paul Bagyenda <bagyenda@dsmagic.com>
   9  *
  10  * This program is free software, distributed under the terms of
  11  * the GNU General Public License
  12  */
  13
  14
  15 #include <stdio.h>
  16 #include <pthread.h>
  17 #include <string.h>
  18 #include <asterisk/lock.h>
  19 #include <asterisk/channel.h>
  20 #include <asterisk/channel_pvt.h>
  21 #include <asterisk/config.h>
  22 #include <asterisk/logger.h>
  23 #include <asterisk/module.h>
  24 #include <asterisk/pbx.h>
  25 #include <asterisk/options.h>
  26 #include <sys/socket.h>
  27 #include <sys/time.h>
  28 #include <errno.h>
  29 #include <unistd.h>
  30 #include <stdlib.h>
  31 #include <arpa/inet.h>
  32 #include <fcntl.h>
  33 #include <sys/ioctl.h>
  34 #include <ctype.h>
  35
  36 #include <vpbapi.h>
  37
  38 #define DEFAULT_GAIN 0
  39 #define DEFAULT_ECHO_CANCEL 1
  40
  41 #define VPB_SAMPLES 240
  42 #define VPB_MAX_BUF VPB_SAMPLES*4 + AST_FRIENDLY_OFFSET
  43
  44 #define VPB_NULL_EVENT 200
  45
  46 #define VPB_WAIT_TIMEOUT 4000
  47
  48 #define MAX_VPB_GAIN 12.0
  49
  50 #if defined(__cplusplus) || defined(c_plusplus)
  51  extern "C" {
  52 #endif
  53
  54 static char *desc = "VoiceTronix V6PCI/V12PCI/V4PCI  API Support";
  55 static char *type = "vpb";
  56 static char *tdesc = "Standard VoiceTronix API Driver";
  57 static char *config = "vpb.conf";
  58
  59 /* Default context for dialtone mode */
  60 static char context[AST_MAX_EXTENSION] = "default";
  61
  62 /* Default language */
  63 static char language[MAX_LANGUAGE] = "";
  64 static int usecnt =0;
  65
  66 static int gruntdetect_timeout = 3600000; /* Grunt detect timeout is 1hr. */
  67
  68 static const int prefformat = AST_FORMAT_SLINEAR;
  69
  70 static ast_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER;
  71
  72 /* Protect the interface list (of vpb_pvt's) */
  73 static ast_mutex_t iflock = AST_MUTEX_INITIALIZER;
  74
  75 /* Protect the monitoring thread, so only one process can kill or start it, and not
  76    when it's doing something critical. */
  77 static ast_mutex_t monlock = AST_MUTEX_INITIALIZER;
  78
  79 /* This is the thread for the monitor which checks for input on the channels
  80    which are not currently in use.  */
  81 static pthread_t monitor_thread;
  82
  83 static int mthreadactive = -1; /* Flag for monitoring monitorthread.*/
  84
  85
  86 static int restart_monitor(void);
  87
  88 /* The private structures of the VPB channels are
  89    linked for selecting outgoing channels */
  90
  91 #define MODE_DIALTONE   1
  92 #define MODE_IMMEDIATE  2
  93 #define MODE_FXO        3
  94
  95 /* Pick a country or add your own! */
  96 #define TONES_AU
  97 #ifdef TONES_AU
  98 static VPB_TONE Dialtone     = {440,    440,    440,    -10,    -10,    -10,    5000,   0   };
  99 static VPB_TONE Busytone     = {470,    0,      0,      -10,    -100,   -100,   5000,   0 };
 100 static VPB_TONE Ringbacktone = {400,    50,     440,    -10,    -10,    -10,    1400,   800 };
 101 #endif
 102 /*
 103 #define TONES_USA
 104 #ifdef TONES_USA
 105 static VPB_TONE Dialtone     = {425,   0,   0, -16,  -100, -100, 10000,    0};
 106 static VPB_TONE Busytone     = {425,   0,   0, -10,  -100, -100,   500,  500};
 107 static VPB_TONE Ringbacktone = {400,   425,   450, -20,  -20, -20,  1000, 1000};
 108 #endif
 109 */
 110
 111 /* grunt tone defn's */
 112 static VPB_DETECT toned_grunt = { 3, VPB_GRUNT, 1, 2000, 3000, 0, 0, -40, 0, 0, 0, 40, { { VPB_DELAY, 1000, 0, 0 }, { VPB_RISING, 0, 40, 0 }, { 0, 100, 0, 0 } } };
 113 static VPB_DETECT toned_ungrunt = { 2, VPB_GRUNT, 1, 2000, 1, 0, 0, -40, 0, 0, 30, 40, { { 0, 0, 0, 0 } } };
 114
 115 /* Use loop drop detection */
 116 static int UseLoopDrop=1;
 117
 118 #define TIMER_PERIOD_RINGBACK 2000
 119 #define TIMER_PERIOD_BUSY 700
 120
 121 #define VPB_EVENTS_ALL (VPB_MRING|VPB_MDIGIT|VPB_MDTMF|VPB_MTONEDETECT|VPB_MTIMEREXP|VPB_MPLAY_UNDERFLOW \
 122                         |VPB_MRECORD_OVERFLOW|VPB_MSTATION_OFFHOOK|VPB_MSTATION_ONHOOK \
 123                         |VPB_MRING_OFF|VPB_MDROP|VPB_MSTATION_FLASH)
 124 #define VPB_EVENTS_NODTMF (VPB_MRING|VPB_MDIGIT|VPB_MTONEDETECT|VPB_MTIMEREXP|VPB_MPLAY_UNDERFLOW \
 125                         |VPB_MRECORD_OVERFLOW|VPB_MSTATION_OFFHOOK|VPB_MSTATION_ONHOOK \
 126                         |VPB_MRING_OFF|VPB_MDROP|VPB_MSTATION_FLASH)
 127 #define VPB_EVENTS_STAT (VPB_MRING|VPB_MDIGIT|VPB_MDTMF|VPB_MTONEDETECT|VPB_MTIMEREXP|VPB_MPLAY_UNDERFLOW \
 128                         |VPB_MRECORD_OVERFLOW|VPB_MSTATION_OFFHOOK|VPB_MSTATION_ONHOOK \
 129                         |VPB_MRING_OFF|VPB_MSTATION_FLASH)
 130
 131
 132 // Dialing parameters for Australia
 133 //#define DIAL_WITH_CALL_PROGRESS
 134 VPB_TONE_MAP DialToneMap[] = {  { VPB_BUSY_AUST, VPB_CALL_DISCONNECT, 0 },
 135                                 { VPB_DIAL, VPB_CALL_DIALTONE, 0 },
 136                                 { VPB_RINGBACK_308, VPB_CALL_RINGBACK, 0 },
 137                                 { VPB_BUSY_AUST, VPB_CALL_BUSY, 0 },
 138                                 { VPB_GRUNT, VPB_CALL_GRUNT, 0 },
 139                                 { 0, 0, 1 } };
 140 #define VPB_DIALTONE_WAIT 2000 /* Wait up to 2s for a dialtone */
 141 #define VPB_RINGWAIT 4000 /* Wait up to 4s for ring tone after dialing */
 142 #define VPB_CONNECTED_WAIT 4000 /* If no ring tone detected for 4s then consider call connected */
 143 #define TIMER_PERIOD_NOANSWER 120000 /* Let it ring for 120s before deciding theres noone there */
 144
 145 #define MAX_BRIDGES_V4PCI 2
 146 #define MAX_BRIDGES_V12PCI 128
 147
 148 /* port states */
 149 #define VPB_STATE_ONHOOK        0
 150 #define VPB_STATE_OFFHOOK       1
 151 #define VPB_STATE_DIALLING      2
 152 #define VPB_STATE_JOINED        3
 153 #define VPB_STATE_GETDTMF       4
 154 #define VPB_STATE_PLAYDIAL      5
 155 #define VPB_STATE_PLAYBUSY      6
 156 #define VPB_STATE_PLAYRING      7
 157
 158
 159 typedef struct  {
 160         int inuse;
 161         struct ast_channel *c0, *c1, **rc;
 162         struct ast_frame **fo;
 163         int flags;
 164         ast_mutex_t lock;
 165         pthread_cond_t cond;
 166         int endbridge;
 167 } vpb_bridge_t;
 168 static vpb_bridge_t * bridges;
 169 static int max_bridges = MAX_BRIDGES_V4PCI;
 170
 171 static ast_mutex_t bridge_lock = AST_MUTEX_INITIALIZER;
 172
 173 typedef enum {
 174         vpb_model_unknown = 0,
 175         vpb_model_v4pci,
 176         vpb_model_v12pci
 177 } vpb_model_t;
 178
 179 static struct vpb_pvt {
 180
 181         ast_mutex_t owner_lock;                 /* Protect blocks that expect ownership to remain the same */
 182         struct ast_channel *owner;              /* Channel who owns us, possibly NULL */
 183
 184         int golock;                             /* Got owner lock ? */
 185
 186         int mode;                               /* fxo/imediate/dialtone*/
 187         int handle;                             /* Handle for vpb interface */
 188
 189         int state;                              /* used to keep port state (internal to driver) */
 190
 191         int group;                              /* Which group this port belongs to */
 192
 193         char dev[256];                          /* Device name, eg vpb/1-1 */
 194         vpb_model_t vpb_model;                  /* card model */
 195
 196         struct ast_frame f, fr;                 /* Asterisk frame interface */
 197         char buf[VPB_MAX_BUF];                  /* Static buffer for reading frames */
 198
 199         int dialtone;                           /* NOT USED */
 200         float txgain, rxgain;                   /* Hardware gain control */
 201         float txswgain, rxswgain;               /* Software gain control */
 202
 203         int wantdtmf;                           /* Waiting for DTMF. */
 204         char context[AST_MAX_EXTENSION];        /* The context for this channel */
 205
 206         char ext[AST_MAX_EXTENSION];            /* DTMF buffer for the ext[ens] */
 207         char language[MAX_LANGUAGE];            /* language being used */
 208         char callerid[AST_MAX_EXTENSION];       /* CallerId used for directly connected phone */
 209
 210         int lastoutput;                         /* Holds the last Audio format output'ed */
 211         int lastinput;                          /* Holds the last Audio format input'ed */
 212         int last_ignore_dtmf;
 213
 214         void *busy_timer;                       /* Void pointer for busy vpb_timer */
 215         int busy_timer_id;                      /* unique timer ID for busy timer */
 216
 217         void *ringback_timer;                   /* Void pointer for ringback vpb_timer */
 218         int ringback_timer_id;                  /* unique timer ID for ringback timer */
 219
 220         double lastgrunt;                       /* time stamp (secs since epoc) of last grunt event */
 221
 222         ast_mutex_t lock;                       /* This one just protects bridge ptr below */
 223         vpb_bridge_t *bridge;
 224
 225         int stopreads;                          /* Stop reading...*/
 226
 227         pthread_t readthread;                   /* For monitoring read channel. One per owned channel. */
 228
 229         ast_mutex_t record_lock;                /* This one prevents reentering a record_buf block */
 230         ast_mutex_t play_lock;                  /* This one prevents reentering a play_buf block */
 231
 232         ast_mutex_t play_dtmf_lock;
 233         char play_dtmf[16];
 234
 235         struct vpb_pvt *next;                   /* Next channel in list */
 236
 237 } *iflist = NULL;
 238
 239 static struct ast_channel *vpb_new(struct vpb_pvt *i, int state, char *context);
 240 static void *do_chanreads(void *pvt);
 241
 242 // Can't get vpb_bridge() working on v4pci without either a horrible
 243 // high pitched feedback noise or bad hiss noise depending on gain settings
 244 // Get asterisk to do the bridging
 245 #define BAD_V4PCI_BRIDGE
 246
 247 // This one enables a half duplex bridge which may be required to prevent high pitched
 248 // feedback when getting asterisk to do the bridging and when using certain gain settings.
 249 //#define HALF_DUPLEX_BRIDGE
 250
 251 static int vpb_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc)
 252 {
 253         struct vpb_pvt *p0 = (struct vpb_pvt *)c0->pvt->pvt;
 254         struct vpb_pvt *p1 = (struct vpb_pvt *)c1->pvt->pvt;
 255         int i, res;
 256
 257         #ifdef BAD_V4PCI_BRIDGE
 258         if(p0->vpb_model==vpb_model_v4pci)
 259                 return -2;
 260         #endif
 261
 262         ast_mutex_lock(&p0->lock);
 263         ast_mutex_lock(&p1->lock);
 264
 265         /* Bridge channels, check if we can.  I believe we always can, so find a slot.*/
 266
 267         ast_mutex_lock(&bridge_lock); {
 268                 for (i = 0; i < max_bridges; i++)
 269                         if (!bridges[i].inuse)
 270                                 break;
 271                 if (i < max_bridges) {
 272                         bridges[i].inuse = 1;
 273                         bridges[i].endbridge = 0;
 274                         bridges[i].flags = flags;
 275                         bridges[i].rc = rc;
 276                         bridges[i].fo = fo;
 277                         bridges[i].c0 = c0;
 278                         bridges[i].c1 = c1;
 279                         ast_mutex_init(&bridges[i].lock);
 280                         pthread_cond_init(&bridges[i].cond, NULL);
 281                 }
 282         } ast_mutex_unlock(&bridge_lock);
 283
 284         if (i == max_bridges) {
 285                 ast_log(LOG_WARNING, "Failed to bridge %s and %s!\n", c0->name, c1->name);
 286                 ast_mutex_unlock(&p0->lock);
 287                 ast_mutex_unlock(&p1->lock);
 288                 return -2;
 289         } else {
 290                 /* Set bridge pointers. You don't want to take these locks while holding bridge lock.*/
 291                 ast_mutex_lock(&p0->lock); {
 292                         p0->bridge = &bridges[i];
 293                 } ast_mutex_unlock(&p0->lock);
 294
 295                 ast_mutex_lock(&p1->lock); {
 296                         p1->bridge = &bridges[i];
 297                 } ast_mutex_unlock(&p1->lock);
 298
 299                 if (option_verbose>1)
 300                         ast_verbose(VERBOSE_PREFIX_2 "Bridging call entered with [%s, %s]\n", c0->name, c1->name);
 301         }
 302
 303         #ifdef HALF_DUPLEX_BRIDGE
 304
 305         if (option_verbose>1)
 306                 ast_verbose(VERBOSE_PREFIX_2 "Starting half-duplex bridge [%s, %s]\n", c0->name, c1->name);
 307
 308         int dir = 0;
 309
 310         memset(p0->buf, 0, sizeof p0->buf);
 311         memset(p1->buf, 0, sizeof p1->buf);
 312
 313         vpb_record_buf_start(p0->handle, VPB_ALAW);
 314         vpb_record_buf_start(p1->handle, VPB_ALAW);
 315
 316         vpb_play_buf_start(p0->handle, VPB_ALAW);
 317         vpb_play_buf_start(p1->handle, VPB_ALAW);
 318
 319         while( !bridges[i].endbridge ) {
 320                 struct vpb_pvt *from, *to;
 321                 if(++dir%2) {
 322                         from = p0;
 323                         to = p1;
 324                 } else {
 325                         from = p1;
 326                         to = p0;
 327                 }
 328                 vpb_record_buf_sync(from->handle, from->buf, VPB_SAMPLES);
 329                 vpb_play_buf_sync(to->handle, from->buf, VPB_SAMPLES);
 330         }
 331
 332         vpb_record_buf_finish(p0->handle);
 333         vpb_record_buf_finish(p1->handle);
 334
 335         vpb_play_buf_finish(p0->handle);
 336         vpb_play_buf_finish(p1->handle);
 337
 338         if (option_verbose>1)
 339                 ast_verbose(VERBOSE_PREFIX_2 "Finished half-duplex bridge [%s, %s]\n", c0->name, c1->name);
 340
 341         res = VPB_OK;
 342
 343         #else
 344
 345         res = vpb_bridge(p0->handle, p1->handle, VPB_BRIDGE_ON, i+1 /* resource 1 & 2 only for V4PCI*/ );
 346         if (res == VPB_OK) {
 347                 //pthread_cond_wait(&bridges[i].cond, &bridges[i].lock); /* Wait for condition signal. */
 348                 while( !bridges[i].endbridge ) {};
 349                 vpb_bridge(p0->handle, p1->handle, VPB_BRIDGE_OFF, i+1 /* resource 1 & 2 only for V4PCI*/ );
 350         }
 351
 352         #endif
 353
 354         ast_mutex_lock(&bridge_lock); {
 355                 bridges[i].inuse = 0;
 356                 ast_mutex_destroy(&bridges[i].lock);
 357                 pthread_cond_destroy(&bridges[i].cond);
 358         } ast_mutex_unlock(&bridge_lock);
 359
 360         p0->bridge = NULL;
 361         p1->bridge = NULL;
 362
 363
 364         if (option_verbose>1)
 365                 ast_verbose(VERBOSE_PREFIX_2 "Bridging call done with [%s, %s] => %d\n", c0->name, c1->name, res);
 366
 367         ast_mutex_unlock(&p0->lock);
 368         ast_mutex_unlock(&p1->lock);
 369         return (res==VPB_OK)?0:-1;
 370 }
 371
 372 static double get_time_in_ms()
 373 {
 374         struct timeval tv;
 375         gettimeofday(&tv, NULL);
 376         return ((double)tv.tv_sec*1000)+((double)tv.tv_usec/1000);
 377 }
 378
 379 // Caller ID can be located in different positions between the rings depending on your Telco
 380 // Australian (Telstra) callerid starts 700ms after 1st ring and finishes 1.5s after first ring
 381 // Use ANALYSE_CID to record rings and determine location of callerid
 382 //#define ANALYSE_CID
 383 #define RING_SKIP 600
 384 #define CID_MSECS 1700
 385
 386 static void get_callerid(struct vpb_pvt *p)
 387 {
 388         short buf[CID_MSECS*8]; // 8kHz sampling rate
 389         double cid_record_time;
 390         int rc;
 391
 392         if(strcasecmp(p->callerid, "on")) {
 393                 p->owner->callerid = strdup("unknown");
 394                 return;
 395         }
 396
 397         if( ast_mutex_trylock(&p->record_lock) == 0 ) {
 398
 399                 char callerid[AST_MAX_EXTENSION] = "";
 400
 401                 cid_record_time = get_time_in_ms();
 402                 if (option_verbose>3)
 403                         ast_verbose(VERBOSE_PREFIX_4 "CID record - start\n");
 404
 405                 #ifdef ANALYSE_CID
 406                 VPB_RECORD record_parms = { "", 8 * 1000 }; // record a couple of rings
 407                 vpb_record_set(p->handle,&record_parms);
 408                 ast_verbose(VERBOSE_PREFIX_4 "Recording debug CID sample to /tmp/cid.raw\n");
 409                 vpb_record_file_sync(p->handle,"/tmp/cid.raw",VPB_LINEAR);
 410                 rc = 1; // don't try to decode_cid
 411                 #else
 412                 // Skip any trailing ringtone
 413                 vpb_sleep(RING_SKIP);
 414
 415                 if (option_verbose>3)
 416                         ast_verbose(VERBOSE_PREFIX_4 "CID record - skipped %fms trailing ring\n",
 417                                  get_time_in_ms() - cid_record_time);
 418                 cid_record_time = get_time_in_ms();
 419
 420                 // Record bit between the rings which contains the callerid
 421                 vpb_record_buf_start(p->handle, VPB_LINEAR);
 422                 rc = vpb_record_buf_sync(p->handle, (char*)buf, sizeof(buf));
 423                 vpb_record_buf_finish(p->handle);
 424                 #endif
 425
 426                 if (option_verbose>3)
 427                         ast_verbose(VERBOSE_PREFIX_4 "CID record - recorded %fms between rings\n",
 428                                 get_time_in_ms() - cid_record_time);
 429
 430                 ast_mutex_unlock(&p->record_lock);
 431
 432                 if( rc != VPB_OK ) {
 433                         ast_log(LOG_ERROR, "Failed to record caller id sample on %s\n", p->dev );
 434                         return;
 435                 }
 436
 437                 // This decodes FSK 1200baud type callerid
 438                 if ((rc=vpb_cid_decode(callerid, buf, CID_MSECS*8)) == VPB_OK ) {
 439                         if(!*callerid)
 440                                 strcpy(callerid,"undisclosed"); // blocked CID (eg caller used 1831)
 441                 } else {
 442                         ast_log(LOG_ERROR, "Failed to decode caller id on %s - %s\n", p->dev, vpb_strerror(rc) );
 443                         strcpy(callerid,"unknown");
 444                 }
 445                 p->owner->callerid = strdup(callerid);
 446
 447         } else
 448                 ast_log(LOG_ERROR, "Failed to set record mode for caller id on %s\n", p->dev );
 449 }
 450
 451 // Terminate any tones we are presently playing
 452 static void stoptone( int handle)
 453 {
 454         int ret;
 455         VPB_EVENT je;
 456         while(vpb_playtone_state(handle)!=VPB_OK){
 457                 vpb_tone_terminate(handle);
 458                 ret = vpb_get_event_ch_async(handle,&je);
 459                 if ((ret == VPB_OK)&&(je.type != VPB_DIALEND)){
 460                         if (option_verbose > 3){
 461                                         ast_verbose(VERBOSE_PREFIX_4 "Stop tone collected a wrong event!!\n");
 462                         }
 463                         vpb_put_event(&je);
 464                 }
 465                 vpb_sleep(10);
 466         }
 467 }
 468
 469 /* Safe vpb_playtone_async */
 470 static int playtone( int handle, VPB_TONE *tone)
 471 {
 472         int ret=VPB_OK;
 473         stoptone(handle);
 474         if (option_verbose > 3)
 475                 ast_verbose(VERBOSE_PREFIX_4 "[%02d]: Playing tone\n", handle);
 476         ret = vpb_playtone_async(handle, tone);
 477         return ret;
 478 }
 479
 480 static inline int monitor_handle_owned(struct vpb_pvt *p, VPB_EVENT *e)
 481 {
 482         struct ast_frame f = {AST_FRAME_CONTROL}; /* default is control, Clear rest. */
 483         int endbridge = 0;
 484
 485         if (option_verbose > 3)
 486                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_owned: got event: [%d=>%d]\n",
 487                         p->dev, e->type, e->data);
 488
 489         f.src = type;
 490         switch (e->type) {
 491                 case VPB_RING:
 492                         if (p->mode == MODE_FXO) {
 493                                 f.subclass = AST_CONTROL_RING;
 494                         } else
 495                                 f.frametype = -1; /* ignore ring on station port. */
 496                         break;
 497
 498                 case VPB_RING_OFF:
 499                         f.frametype = -1;
 500                         break;
 501
 502                 case VPB_TIMEREXP:
 503                         if (e->data == p->busy_timer_id) {
 504                                 playtone(p->handle,&Busytone);
 505                                 p->state = VPB_STATE_PLAYBUSY;
 506                                 vpb_timer_stop(p->busy_timer);
 507                                 vpb_timer_start(p->busy_timer);
 508                                 f.frametype = -1;
 509                         } else if (e->data == p->ringback_timer_id) {
 510                                 playtone(p->handle, &Ringbacktone);
 511                                 vpb_timer_stop(p->ringback_timer);
 512                                 vpb_timer_start(p->ringback_timer);
 513                                 f.frametype = -1;
 514                         } else {
 515                                 f.frametype = -1; /* Ignore. */
 516                         }
 517                         break;
 518
 519                 case VPB_DTMF:
 520                         if (p->owner->_state == AST_STATE_UP) {
 521                                 f.frametype = AST_FRAME_DTMF;
 522                                 f.subclass = e->data;
 523                         } else
 524                                 f.frametype = -1;
 525                         break;
 526
 527                 case VPB_TONEDETECT:
 528                         if (e->data == VPB_BUSY || e->data == VPB_BUSY_308 || e->data == VPB_BUSY_AUST ) {
 529                                 f.subclass = AST_CONTROL_HANGUP;
 530                                 if (p->owner->_state == AST_STATE_UP) {
 531                                         f.subclass = AST_CONTROL_HANGUP;
 532                                 }
 533                                 else {
 534                                         f.subclass = AST_CONTROL_BUSY;
 535                                 }
 536                         } else if (e->data == VPB_GRUNT) {
 537                                 if( ( get_time_in_ms() - p->lastgrunt ) > gruntdetect_timeout ) {
 538                                         // Nothing heard on line for a very long time
 539                                         // Timeout connection
 540                                         if (option_verbose > 2)
 541                                                 ast_verbose(VERBOSE_PREFIX_3 "grunt timeout\n");
 542                                         ast_log(LOG_NOTICE,"%s: Line hangup due of lack of conversation\n",p->dev);
 543                                         f.subclass = AST_CONTROL_HANGUP;
 544                                 } else {
 545                                         p->lastgrunt = get_time_in_ms();
 546                                         f.frametype = -1;
 547                                 }
 548                         } else
 549                                 f.frametype = -1;
 550                         break;
 551
 552                 case VPB_CALLEND:
 553                         #ifdef DIAL_WITH_CALL_PROGRESS
 554                         if (e->data == VPB_CALL_CONNECTED)
 555                                 f.subclass = AST_CONTROL_ANSWER;
 556                         else if (e->data == VPB_CALL_NO_DIAL_TONE || e->data == VPB_CALL_NO_RING_BACK)
 557                                 f.subclass =  AST_CONTROL_CONGESTION;
 558                         else if (e->data == VPB_CALL_NO_ANSWER || e->data == VPB_CALL_BUSY)
 559                                 f.subclass = AST_CONTROL_BUSY;
 560                         else if (e->data  == VPB_CALL_DISCONNECTED)
 561                                 f.subclass = AST_CONTROL_HANGUP;
 562                         #else
 563                         ast_log(LOG_NOTICE,"%s: Got call progress callback but blind dialing \n", p->dev);
 564                         f.frametype = -1;
 565                         #endif
 566                         break;
 567
 568                 case VPB_STATION_OFFHOOK:
 569                         f.subclass = AST_CONTROL_ANSWER;
 570                         break;
 571
 572                 /* not sure why this was commented out */
 573                 case VPB_DROP:
 574                         if ((p->mode == MODE_FXO)&&(UseLoopDrop)){ /* ignore loop drop on stations */
 575                                 if (p->owner->_state == AST_STATE_UP)
 576                                         f.subclass = AST_CONTROL_HANGUP;
 577                                 else
 578                                         f.frametype = -1;
 579                         }
 580                         break;
 581                 /* */
 582                 case VPB_STATION_ONHOOK:
 583                         f.subclass = AST_CONTROL_HANGUP;
 584                         break;
 585
 586                 case VPB_STATION_FLASH:
 587                         f.subclass = AST_CONTROL_FLASH;
 588                         break;
 589
 590                 // Called when dialing has finished and ringing starts
 591                 // No indication that call has really been answered when using blind dialing
 592                 case VPB_DIALEND:
 593                         if (p->state < 5){
 594                                 f.subclass = AST_CONTROL_ANSWER;
 595                                 if (option_verbose > 1)
 596                                         ast_verbose(VERBOSE_PREFIX_2 "%s: Dialend\n", p->dev);
 597                         } else {
 598                                 f.frametype = -1;
 599                         }
 600                         break;
 601
 602                 case VPB_PLAY_UNDERFLOW:
 603                         f.frametype = -1;
 604                         vpb_reset_play_fifo_alarm(p->handle);
 605                         break;
 606
 607                 case VPB_RECORD_OVERFLOW:
 608                         f.frametype = -1;
 609                         vpb_reset_record_fifo_alarm(p->handle);
 610                         break;
 611
 612                 default:
 613                         f.frametype = -1;
 614                         break;
 615         }
 616
 617         if (option_verbose > 3)
 618                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_owned: putting frame type[%d]subclass[%d], bridge=%p\n",
 619                         p->dev, f.frametype, f.subclass, (void *)p->bridge);
 620
 621         ast_mutex_lock(&p->lock); {
 622                 if (p->bridge) { /* Check what happened, see if we need to report it. */
 623                         switch (f.frametype) {
 624                                 case AST_FRAME_DTMF:
 625                                         if (!(p->bridge->c0 == p->owner &&
 626                                                         (p->bridge->flags & AST_BRIDGE_DTMF_CHANNEL_0) ) &&
 627                                                         !(p->bridge->c1 == p->owner &&
 628                                                         (p->bridge->flags & AST_BRIDGE_DTMF_CHANNEL_1) ))
 629                                                 /* Kill bridge, this is interesting. */
 630                                                 endbridge = 1;
 631                                         break;
 632
 633                                 case AST_FRAME_CONTROL:
 634                                         if (!(p->bridge->flags & AST_BRIDGE_IGNORE_SIGS))
 635                                         #if 0
 636                                         if (f.subclass == AST_CONTROL_BUSY ||
 637                                         f.subclass == AST_CONTROL_CONGESTION ||
 638                                         f.subclass == AST_CONTROL_HANGUP ||
 639                                         f.subclass == AST_CONTROL_FLASH)
 640                                         #endif
 641                                                 endbridge = 1;
 642                                         break;
 643
 644                                 default:
 645                                         break;
 646                         }
 647                         if (endbridge) {
 648                                 if (p->bridge->fo)
 649                                         *p->bridge->fo = ast_frisolate(&f);
 650                                 if (p->bridge->rc)
 651                                         *p->bridge->rc = p->owner;
 652
 653                                 ast_mutex_lock(&p->bridge->lock); {
 654                                         p->bridge->endbridge = 1;
 655                                         pthread_cond_signal(&p->bridge->cond);
 656                                 } ast_mutex_unlock(&p->bridge->lock);
 657                         }
 658                 }
 659         } ast_mutex_unlock(&p->lock);
 660
 661         if (endbridge) return 0;
 662
 663         // Trylock used here to avoid deadlock that can occur if we
 664         // happen to be in here handling an event when hangup is called
 665         // Problem is that hangup holds p->owner->lock
 666         if (f.frametype >= 0 && f.frametype != AST_FRAME_NULL) {
 667                 if (ast_mutex_trylock(&p->owner->lock)==0)  {
 668                         ast_queue_frame(p->owner, &f);
 669                         ast_mutex_unlock(&p->owner->lock);
 670                 } else {
 671                         ast_verbose("%s: handled_owned: Missed event %d/%d \n",
 672                                 p->dev,f.frametype, f.subclass);
 673                 }
 674         }
 675
 676         return 0;
 677 }
 678
 679 static inline int monitor_handle_notowned(struct vpb_pvt *p, VPB_EVENT *e)
 680 {
 681         char s[2] = {0};
 682
 683         if (option_verbose > 3) {
 684                 char str[VPB_MAX_STR];
 685                 vpb_translate_event(e, str);
 686                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: mode=%d, event[%d][%s]=[%d]\n",
 687                         p->dev, p->mode, e->type,str, e->data);
 688         }
 689
 690         switch(e->type) {
 691                 case VPB_RING:
 692                         if (p->mode == MODE_FXO) /* FXO port ring, start * */ {
 693                                 vpb_new(p, AST_STATE_RING, p->context);
 694                                 get_callerid(p);        /* Australian Caller ID only between 1st and 2nd ring */
 695                         }
 696                         break;
 697
 698                 case VPB_RING_OFF:
 699                         break;
 700
 701                 case VPB_STATION_OFFHOOK:
 702                         if (p->mode == MODE_IMMEDIATE)
 703                                 vpb_new(p,AST_STATE_RING, p->context);
 704                         else {
 705                                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: playing dialtone\n",p->dev);
 706                                 playtone(p->handle, &Dialtone);
 707                                 p->wantdtmf = 1;
 708                                 p->ext[0] = 0;  /* Just to be sure & paranoid.*/
 709                                 p->state=VPB_STATE_PLAYDIAL;
 710                         }
 711                         break;
 712
 713                 case VPB_DIALEND:
 714                         if (p->mode == MODE_DIALTONE){
 715                                 if (p->state == VPB_STATE_PLAYDIAL) {
 716                                         playtone(p->handle, &Dialtone);
 717                                         p->wantdtmf = 1;
 718                                         p->ext[0] = 0;  // Just to be sure & paranoid.
 719                                 }
 720                                 /* These are not needed as they have timers to restart them
 721                                 else if (p->state == VPB_STATE_PLAYBUSY) {
 722                                         playtone(p->handle, &Busytone);
 723                                         p->wantdtmf = 1;
 724                                         p->ext[0] = 0;  // Just to be sure & paranoid.
 725                                 }
 726                                 else if (p->state == VPB_STATE_PLAYRING) {
 727                                         playtone(p->handle, &Ringbacktone);
 728                                         p->wantdtmf = 1;
 729                                         p->ext[0] = 0;  // Just to be sure & paranoid.
 730                                 }
 731                                 */
 732                         } else {
 733                                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: Got a DIALEND when not really expected\n",p->dev);
 734                         }
 735                         break;
 736
 737                 case VPB_STATION_ONHOOK:        /* clear ext */
 738                         stoptone(p->handle);
 739                         p->wantdtmf = 1 ;
 740                         p->ext[0] = 0;
 741                         p->state=VPB_STATE_ONHOOK;
 742                         break;
 743
 744                 case VPB_DTMF:
 745                         if (p->state == VPB_STATE_ONHOOK){
 746                                 /* DTMF's being passed while on-hook maybe Caller ID */
 747                                 break;
 748                         }
 749                         if (p->wantdtmf == 1) {
 750                                 stoptone(p->handle);
 751                                 p->wantdtmf = 0;
 752                         }
 753                         p->state=VPB_STATE_GETDTMF;
 754                         s[0] = e->data;
 755                         strcat(p->ext, s);
 756                         if (ast_exists_extension(NULL, p->context, p->ext, 1, p->callerid)){
 757                                 vpb_new(p,AST_STATE_RING, p->context);
 758                         } else if (!ast_canmatch_extension(NULL, p->context, p->ext, 1, p->callerid)){
 759                                 if (ast_exists_extension(NULL, "default", p->ext, 1, p->callerid)) {
 760                                         vpb_new(p,AST_STATE_RING, "default");
 761                                 } else if (!ast_canmatch_extension(NULL, "default", p->ext, 1, p->callerid)) {
 762                                         if (option_verbose > 3) {
 763                                                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: can't match anything in %s or default\n",
 764                                                          p->dev, p->context);
 765                                         }
 766                                         playtone(p->handle, &Busytone);
 767                                         vpb_timer_stop(p->busy_timer);
 768                                         vpb_timer_start(p->busy_timer);
 769                                         p->state = VPB_STATE_PLAYBUSY;
 770                                 }
 771                         }
 772                         break;
 773
 774                 default:
 775                         /* Ignore.*/
 776                         break;
 777         }
 778
 779         if (option_verbose > 3)
 780                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: mode=%d, [%d=>%d]\n",
 781                         p->dev, p->mode, e->type, e->data);
 782
 783         return 0;
 784 }
 785
 786 static void *do_monitor(void *unused)
 787 {
 788
 789         /* Monitor thread, doesn't die until explicitly killed. */
 790
 791         if (option_verbose > 1)
 792                 ast_verbose(VERBOSE_PREFIX_2 "Starting vpb monitor thread[%ld]\n",
 793         pthread_self());
 794
 795         pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
 796
 797         for(;;) {
 798                 VPB_EVENT e;
 799                 VPB_EVENT je;
 800                 char str[VPB_MAX_STR];
 801                 struct vpb_pvt *p;
 802
 803                 /**/
 804                 if (option_verbose > 3)
 805                      ast_verbose(VERBOSE_PREFIX_4 "Monitor waiting for event\n");
 806                 /**/
 807
 808                 int res = vpb_get_event_sync(&e, VPB_WAIT_TIMEOUT);
 809                 if( (res==VPB_NO_EVENTS) || (res==VPB_TIME_OUT) ){
 810                         /*
 811                         if (option_verbose > 3){
 812                                 if (res ==  VPB_NO_EVENTS){
 813                                         ast_verbose(VERBOSE_PREFIX_4 "No events....\n");
 814                                 } else {
 815                                         ast_verbose(VERBOSE_PREFIX_4 "No events, timed out....\n");
 816                                 }
 817                         }
 818                         */
 819                         continue;
 820                 }
 821
 822                 if (res != VPB_OK) {
 823                         ast_log(LOG_ERROR,"Monitor get event error %s\n", vpb_strerror(res) );
 824                         ast_verbose("Monitor get event error %s\n", vpb_strerror(res) );
 825                         continue;
 826                 }
 827
 828                 str[0] = 0;
 829
 830                 p = NULL;
 831
 832                 ast_mutex_lock(&monlock); {
 833                         vpb_translate_event(&e, str);
 834
 835                         if (e.type == VPB_NULL_EVENT) {
 836                                 if (option_verbose > 3)
 837                                         ast_verbose(VERBOSE_PREFIX_4 "Monitor got null event\n");
 838                                 goto done; /* Nothing to do, just a wakeup call.*/
 839                         }
 840                         if (strlen(str)>1){
 841                                 str[(strlen(str)-1)]='\0';
 842                         }
 843
 844                         ast_mutex_lock(&iflock); {
 845                                 p = iflist;
 846                                 while (p && p->handle != e.handle)
 847                                         p = p->next;
 848                         } ast_mutex_unlock(&iflock);
 849
 850                         if (p && (option_verbose > 3))
 851                                 ast_verbose(VERBOSE_PREFIX_4 "%s: Event [%d=>%s] \n",
 852                                         p ? p->dev : "null", e.type, str );
 853                         done: (void)0;
 854
 855                 } ast_mutex_unlock(&monlock);
 856
 857                 if (!p) {
 858                         if (e.type != VPB_NULL_EVENT){
 859                                 ast_log(LOG_WARNING, "Got event [%s][%d], no matching iface!\n", str,e.type);
 860                                 if (option_verbose > 3){
 861                                         ast_verbose(VERBOSE_PREFIX_4 "vpb/ERR: No interface for Event [%d=>%s] \n",e.type,str );
 862                                 }
 863                         }
 864                         continue;
 865                 }
 866
 867                 /* flush the event from the channel event Q */
 868                 vpb_get_event_ch_async(e.handle,&je);
 869                 if (option_verbose > 3){
 870                         vpb_translate_event(&je, str);
 871                         ast_verbose( VERBOSE_PREFIX_4 "%s: Flushing event [%d]=>%s\n",p->dev,je.type,str);
 872                 }
 873
 874                 /* Check for ownership and locks */
 875                 if ((p->owner)&&(!p->golock)){
 876                         /* Need to get owner lock */
 877                         /* Safely grab both p->lock and p->owner->lock so that there
 878                         cannot be a race with something from the other side */
 879                         /*
 880                         ast_mutex_lock(&p->lock);
 881                         while(ast_mutex_trylock(&p->owner->lock)) {
 882                                 ast_mutex_unlock(&p->lock);
 883                                 usleep(1);
 884                                 ast_mutex_lock(&p->lock);
 885                                 if (!p->owner)
 886                                         break;
 887                         }
 888                         if (p->owner)
 889                                 p->golock=1;
 890                         */
 891                 }
 892                 /* Two scenarios: Are you owned or not. */
 893                 if (p->owner) {
 894                         monitor_handle_owned(p, &e);
 895                 } else {
 896                         monitor_handle_notowned(p, &e);
 897                 }
 898                 if ((!p->owner)&&(p->golock)){
 899                         ast_mutex_unlock(&p->owner->lock);
 900                         ast_mutex_unlock(&p->lock);
 901                 }
 902
 903         }
 904
 905         return NULL;
 906 }
 907
 908 static int restart_monitor(void)
 909 {
 910         int error = 0;
 911
 912         /* If we're supposed to be stopped -- stay stopped */
 913         if (mthreadactive == -2)
 914                 return 0;
 915
 916         if (option_verbose > 3)
 917                 ast_verbose(VERBOSE_PREFIX_4 "Restarting monitor\n");
 918
 919         ast_mutex_lock(&monlock); {
 920                 if (monitor_thread == pthread_self()) {
 921                         ast_log(LOG_WARNING, "Cannot kill myself\n");
 922                         error = -1;
 923                         if (option_verbose > 3)
 924                                 ast_verbose(VERBOSE_PREFIX_4 "Monitor trying to kill monitor\n");
 925                         goto done;
 926                 }
 927                 if (mthreadactive != -1) {
 928                         /* Why do other drivers kill the thread? No need says I, simply awake thread with event. */
 929                         VPB_EVENT e;
 930                         e.handle = 0;
 931                         e.type = VPB_NULL_EVENT;
 932                         e.data = 0;
 933
 934                         if (option_verbose > 3)
 935                                 ast_verbose(VERBOSE_PREFIX_4 "Trying to reawake monitor\n");
 936
 937                         vpb_put_event(&e);
 938                 } else {
 939                         /* Start a new monitor */
 940                         int pid = pthread_create(&monitor_thread, NULL, do_monitor, NULL);
 941                         if (option_verbose > 3)
 942                                 ast_verbose(VERBOSE_PREFIX_4 "Created new monitor thread %d\n",pid);
 943                         if (pid < 0) {
 944                                 ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
 945                                 error = -1;
 946                                 goto done;
 947                         } else
 948                                 mthreadactive = 0; /* Started the thread!*/
 949                 }
 950                 done: (void)0;
 951         } ast_mutex_unlock(&monlock);
 952
 953         if (option_verbose > 3)
 954                 ast_verbose(VERBOSE_PREFIX_4 "Monitor restarted\n");
 955
 956         return error;
 957 }
 958
 959 // Per board config that must be called after vpb_open()
 960 static void mkbrd(vpb_model_t model, int echo_cancel)
 961 {
 962         if(!bridges) {
 963                 if(model==vpb_model_v4pci)
 964                         max_bridges = MAX_BRIDGES_V4PCI;
 965                 bridges = (vpb_bridge_t *)malloc(max_bridges * sizeof(vpb_bridge_t) );
 966                 if(!bridges)
 967                         ast_log(LOG_ERROR, "Failed to initialize bridges\n");
 968                 else
 969                         memset(bridges,0,max_bridges * sizeof(vpb_bridge_t));
 970         }
 971         if(!echo_cancel) {
 972                 if (model==vpb_model_v4pci) {
 973                         vpb_echo_canc_disable();
 974                         ast_log(LOG_NOTICE, "Voicetronix echo cancellation OFF\n");
 975                 }
 976                 else {
 977                 /* need to it port by port for OpenSwitch*/
 978                 }
 979         } else {
 980                 if (model==vpb_model_v4pci) {
 981                         vpb_echo_canc_enable();
 982                         ast_log(LOG_NOTICE, "Voicetronix echo cancellation ON\n");
 983                 }
 984                 else {
 985                 /* need to it port by port for OpenSwitch*/
 986                 }
 987         }
 988 }
 989
 990 struct vpb_pvt *mkif(int board, int channel, int mode, float txgain, float rxgain,
 991                          float txswgain, float rxswgain, int bal1, int bal2, int bal3,
 992                          char * callerid, int echo_cancel, int group )
 993 {
 994         struct vpb_pvt *tmp;
 995         char buf[64];
 996
 997         tmp = (struct vpb_pvt *)calloc(1, sizeof *tmp);
 998
 999         if (!tmp)
1000                 return NULL;
1001
1002         tmp->handle = vpb_open(board, channel);
1003
1004         if (tmp->handle < 0) {
1005                 ast_log(LOG_WARNING, "Unable to create channel vpb/%d-%d: %s\n",
1006                                         board, channel, strerror(errno));
1007                 free(tmp);
1008                 return NULL;
1009         }
1010
1011         sprintf(tmp->dev, "vpb/%d-%d", board, channel);
1012
1013         tmp->mode = mode;
1014
1015         tmp->group = group;
1016
1017         strcpy(tmp->language, language);
1018         strcpy(tmp->context, context);
1019
1020         if(callerid) {
1021                 strcpy(tmp->callerid, callerid);
1022                 free(callerid);
1023         } else {
1024                 strcpy(tmp->callerid, "unknown");
1025         }
1026
1027         /* check if codec balances have been set in the config file */
1028         if (bal3>=0) {
1029                 if ((bal1>=0) && !(bal1 & 32)) bal1 |= 32;
1030                         vpb_set_codec_reg(tmp->handle, 0x42, bal3);
1031         }
1032         if(bal1>=0) vpb_set_codec_reg(tmp->handle, 0x32, bal1);
1033         if(bal2>=0) vpb_set_codec_reg(tmp->handle, 0x3a, bal2);
1034
1035         tmp->txgain = txgain;
1036         vpb_play_set_hw_gain(tmp->handle, (txgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : txgain);
1037
1038         tmp->rxgain = rxgain;
1039         vpb_record_set_hw_gain(tmp->handle, (rxgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : rxgain);
1040
1041         tmp->txswgain = txswgain;
1042         vpb_play_set_gain(tmp->handle, (txswgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : txswgain);
1043
1044         tmp->rxswgain = rxswgain;
1045         vpb_record_set_gain(tmp->handle, (rxswgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : rxswgain);
1046
1047         tmp->vpb_model = vpb_model_unknown;
1048         if( vpb_get_model(buf) == VPB_OK ) {
1049                 if(strcmp(buf,"V12PCI")==0)
1050                         tmp->vpb_model = vpb_model_v12pci;
1051                 else if(strcmp(buf,"VPB4")==0)
1052                         tmp->vpb_model = vpb_model_v4pci;
1053         }
1054
1055         ast_mutex_init(&tmp->lock);
1056         ast_mutex_init(&tmp->record_lock);
1057         ast_mutex_init(&tmp->play_lock);
1058         ast_mutex_init(&tmp->play_dtmf_lock);
1059
1060         tmp->golock=0;
1061
1062         tmp->busy_timer_id = vpb_timer_get_unique_timer_id();
1063         vpb_timer_open(&tmp->busy_timer, tmp->handle, tmp->busy_timer_id, TIMER_PERIOD_BUSY);
1064
1065         tmp->ringback_timer_id = vpb_timer_get_unique_timer_id();
1066         vpb_timer_open(&tmp->ringback_timer, tmp->handle, tmp->ringback_timer_id, TIMER_PERIOD_RINGBACK);
1067
1068         if (mode == MODE_FXO){
1069                 vpb_set_event_mask(tmp->handle, VPB_EVENTS_NODTMF );
1070         }
1071         else {
1072                 vpb_set_event_mask(tmp->handle, VPB_EVENTS_STAT );
1073         }
1074
1075         if ((tmp->vpb_model == vpb_model_v12pci) && (echo_cancel)){
1076                 vpb_hostecho_on(tmp->handle);
1077         }
1078
1079         /* define grunt tone */
1080         vpb_settonedet(tmp->handle,&toned_ungrunt);
1081
1082         ast_log(LOG_NOTICE,"Voicetronix %s channel %s initialized (rxgain=%f txgain=%f) (%f/%f/0x%X/0x%X/0x%X)\n",
1083                 (tmp->vpb_model==vpb_model_v4pci)?"V4PCI":
1084                 (tmp->vpb_model==vpb_model_v12pci)?"V12PCI":"[Unknown model]",
1085                 tmp->dev, tmp->rxswgain, tmp->txswgain, tmp->rxgain, tmp->txgain, bal1, bal2, bal3 );
1086
1087         return tmp;
1088 }
1089
1090 static int vpb_indicate(struct ast_channel *ast, int condition)
1091 {
1092         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1093         int res = 0;
1094
1095         if (option_verbose > 3)
1096                 ast_verbose(VERBOSE_PREFIX_4 "%s: vpb indicate [%d]\n", p->dev, condition);
1097         if (ast->_state != AST_STATE_UP) {
1098                 return res;
1099         }
1100
1101         ast_mutex_lock(&p->lock);
1102         switch(condition) {
1103                 case AST_CONTROL_BUSY:
1104                 case AST_CONTROL_CONGESTION:
1105                         playtone(p->handle, &Busytone);
1106                         p->state = VPB_STATE_PLAYBUSY;
1107                         vpb_timer_stop(p->busy_timer);
1108                         vpb_timer_start(p->busy_timer);
1109                         break;
1110                 case AST_CONTROL_RINGING:
1111                         playtone(p->handle, &Ringbacktone);
1112                         p->state = VPB_STATE_PLAYRING;
1113                         if (option_verbose > 3)
1114                                 ast_verbose(VERBOSE_PREFIX_4 "%s: vpb indicate: setting ringback timer [%d]\n", p->dev,p->ringback_timer_id);
1115
1116                         vpb_timer_stop(p->ringback_timer);
1117                         vpb_timer_start(p->ringback_timer);
1118                         break;
1119                 case AST_CONTROL_ANSWER:
1120                 case -1: /* -1 means stop playing? */
1121                         vpb_timer_stop(p->ringback_timer);
1122                         vpb_timer_stop(p->busy_timer);
1123                         stoptone(p->handle);
1124                         break;
1125                 case AST_CONTROL_HANGUP:
1126                         playtone(p->handle, &Busytone);
1127                         p->state = VPB_STATE_PLAYBUSY;
1128                         vpb_timer_stop(p->busy_timer);
1129                         vpb_timer_start(p->busy_timer);
1130                         break;
1131
1132                 default:
1133                         res = 0;
1134                         break;
1135         }
1136         ast_mutex_unlock(&p->lock);
1137         return res;
1138 }
1139
1140 static int vpb_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
1141 {
1142         struct vpb_pvt *p = (struct vpb_pvt *)newchan->pvt->pvt;
1143
1144         ast_mutex_lock(&p->lock);
1145         ast_log(LOG_DEBUG, "New owner for channel %s is %s\n", p->dev, newchan->name);
1146
1147         if (p->owner == oldchan) {
1148                 p->owner = newchan;
1149         }
1150
1151         if (newchan->_state == AST_STATE_RINGING)
1152                 vpb_indicate(newchan, AST_CONTROL_RINGING);
1153
1154         ast_mutex_unlock(&p->lock);
1155         return 0;
1156 }
1157
1158 static int vpb_digit(struct ast_channel *ast, char digit)
1159 {
1160         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1161         char s[2];
1162
1163         ast_mutex_lock(&p->lock);
1164
1165
1166         s[0] = digit;
1167         s[1] = '\0';
1168
1169         if (option_verbose > 3)
1170                 ast_verbose(VERBOSE_PREFIX_4 "%s: play digit[%s]\n", p->dev, s);
1171
1172         ast_mutex_lock(&p->play_dtmf_lock);
1173         strncat(p->play_dtmf,s,sizeof(*p->play_dtmf));
1174         ast_mutex_unlock(&p->play_dtmf_lock);
1175
1176         ast_mutex_unlock(&p->lock);
1177         return 0;
1178 }
1179
1180 static int vpb_call(struct ast_channel *ast, char *dest, int timeout)
1181 {
1182         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1183         int res = 0,i;
1184         char *s = strrchr(dest, '/');
1185         char dialstring[254];
1186
1187         ast_mutex_lock(&p->lock);
1188
1189         if (s)
1190                 s = s + 1;
1191         else
1192                 s = dest;
1193         strcpy(dialstring,s);
1194         for (i=0; dialstring[i] != '\0' ; i++) {
1195                 if ((dialstring[i] == 'w') || (dialstring[i] == 'W'))
1196                         dialstring[i] = ',';
1197                 else if ((dialstring[i] == 'f') || (dialstring[i] == 'F'))
1198                         dialstring[i] = '&';
1199         }
1200         if (option_verbose > 3)
1201                 ast_verbose(VERBOSE_PREFIX_4 "%s: starting call\n", p->dev);
1202
1203         if (ast->_state != AST_STATE_DOWN && ast->_state != AST_STATE_RESERVED) {
1204                 ast_log(LOG_WARNING, "vpb_call on %s neither down nor reserved!\n", ast->name);
1205                 ast_mutex_unlock(&p->lock);
1206                 return -1;
1207         }
1208         if (p->mode != MODE_FXO)  /* Station port, ring it. */
1209                 res = vpb_ring_station_async(p->handle, VPB_RING_STATION_ON,0);
1210         else {
1211                 VPB_CALL call;
1212
1213                 // Dial must timeout or it can leave channels unuseable
1214                 if( timeout == 0 )
1215                         timeout = TIMER_PERIOD_NOANSWER;
1216                 else
1217                         timeout = timeout * 1000; //convert from secs to ms.
1218
1219                 // These timeouts are only used with call progress dialing
1220                 call.dialtones = 1; // Number of dialtones to get outside line
1221                 call.dialtone_timeout = VPB_DIALTONE_WAIT; // Wait this long for dialtone (ms)
1222                 call.ringback_timeout = VPB_RINGWAIT; // Wait this long for ringing after dialing (ms)
1223                 call.inter_ringback_timeout = VPB_CONNECTED_WAIT; // If ringing stops for this long consider it connected (ms)
1224                 call.answer_timeout = timeout; // Time to wait for answer after ringing starts (ms)
1225                 memcpy( &call.tone_map,  DialToneMap, sizeof(DialToneMap) );
1226                 vpb_set_call(p->handle, &call);
1227
1228                 if (option_verbose > 1)
1229                         ast_verbose(VERBOSE_PREFIX_2 "%s: Calling %s on %s \n",p->dev, dialstring, ast->name);
1230
1231                 if (option_verbose > 2) {
1232                         int j;
1233                         ast_verbose(VERBOSE_PREFIX_2 "%s: Dial parms for %s %d/%dms/%dms/%dms/%dms\n", p->dev
1234                                 , ast->name, call.dialtones, call.dialtone_timeout
1235                                 , call.ringback_timeout, call.inter_ringback_timeout
1236                                 , call.answer_timeout );
1237                         for( j=0; !call.tone_map[j].terminate; j++ )
1238                                 ast_verbose(VERBOSE_PREFIX_2 "%s: Dial parms for %s tone %d->%d\n", p->dev,
1239                                         ast->name, call.tone_map[j].tone_id, call.tone_map[j].call_id);
1240                 }
1241
1242                 vpb_sethook_sync(p->handle,VPB_OFFHOOK);
1243                 p->state=VPB_STATE_OFFHOOK;
1244
1245                 #ifndef DIAL_WITH_CALL_PROGRESS
1246                 vpb_sleep(300);
1247                 res = vpb_dial_async(p->handle, dialstring);
1248                 #else
1249                 res = vpb_call_async(p->handle, dialstring);
1250                 #endif
1251
1252                 if (res != VPB_OK) {
1253                         ast_log(LOG_DEBUG, "Call on %s to %s failed: %s\n", ast->name, s, vpb_strerror(res));
1254                         res = -1;
1255                 } else
1256                         res = 0;
1257         }
1258
1259         if (option_verbose > 2)
1260                 ast_verbose(VERBOSE_PREFIX_3 "%s: VPB Calling %s [t=%d] on %s returned %d\n",p->dev , s, timeout, ast->name, res);
1261         if (res == 0) {
1262                 ast_setstate(ast, AST_STATE_RINGING);
1263                 ast_queue_control(ast,AST_CONTROL_RINGING);
1264         }
1265
1266         if (!p->readthread){
1267                 pthread_create(&p->readthread, NULL, do_chanreads, (void *)p);
1268         }
1269
1270         ast_mutex_unlock(&p->lock);
1271         return res;
1272 }
1273
1274 static int vpb_hangup(struct ast_channel *ast)
1275 {
1276         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1277         VPB_EVENT je;
1278         char str[VPB_MAX_STR];
1279
1280         ast_mutex_lock(&p->lock);
1281         if (option_verbose > 1)
1282                 ast_verbose(VERBOSE_PREFIX_2 "%s: Hangup requested\n", ast->name);
1283
1284         if (!ast->pvt || !ast->pvt->pvt) {
1285                 ast_log(LOG_WARNING, "%s: channel not connected?\n", ast->name);
1286                 ast_mutex_unlock(&p->lock);
1287                 return 0;
1288         }
1289
1290         if(option_verbose>3)
1291                 ast_verbose( VERBOSE_PREFIX_4 "%s: Setting state down\n",ast->name);
1292         ast_setstate(ast,AST_STATE_DOWN);
1293
1294
1295         /* Stop record */
1296         p->stopreads = 1;
1297         if( p->readthread ){
1298                 pthread_join(p->readthread, NULL);
1299                 if(option_verbose>3)
1300                         ast_verbose( VERBOSE_PREFIX_4 "%s: stopped record thread on %s\n",ast->name,p->dev);
1301         }
1302
1303         /* Stop play */
1304         if (p->lastoutput != -1) {
1305                 if(option_verbose>1)
1306                         ast_verbose( VERBOSE_PREFIX_2 "%s: Ending play mode on %s\n",ast->name,p->dev);
1307                 vpb_play_terminate(p->handle);
1308                 ast_mutex_lock(&p->play_lock); {
1309                         vpb_play_buf_finish(p->handle);
1310                 } ast_mutex_unlock(&p->play_lock);
1311         }
1312
1313         if (p->mode != MODE_FXO) {
1314                 /* station port. */
1315                 vpb_ring_station_async(p->handle, VPB_RING_STATION_OFF,0);
1316                 if(p->state!=VPB_STATE_ONHOOK){
1317                         /* This is causing a "dial end" "play tone" loop
1318                         playtone(p->handle, &Busytone);
1319                         p->state = VPB_STATE_PLAYBUSY;
1320                         if(option_verbose>4)
1321                                 ast_verbose( VERBOSE_PREFIX_4 "%s: Station offhook[%d], playing busy tone\n",
1322                                                                 ast->name,p->state);
1323                         */
1324                 }
1325                 else {
1326                         stoptone(p->handle);
1327                 }
1328         } else {
1329                 stoptone(p->handle); // Terminates any dialing
1330                 vpb_sethook_sync(p->handle, VPB_ONHOOK);
1331                 p->state=VPB_STATE_ONHOOK;
1332         }
1333         while (VPB_OK==vpb_get_event_ch_async(p->handle,&je)){
1334                 if(option_verbose>3) {
1335                         vpb_translate_event(&je, str);
1336                         ast_verbose( VERBOSE_PREFIX_4 "%s: Flushing event [%d]=>%s\n",ast->name,je.type,str);
1337                 }
1338         }
1339
1340         p->readthread = 0;
1341         p->lastoutput = -1;
1342         p->lastinput = -1;
1343         p->last_ignore_dtmf = 1;
1344         p->ext[0]  = 0;
1345         p->dialtone = 0;
1346
1347         p->owner = NULL;
1348         ast->pvt->pvt=NULL;
1349
1350         ast_mutex_lock(&usecnt_lock); {
1351                 usecnt--;
1352         } ast_mutex_unlock(&usecnt_lock);
1353         ast_update_use_count();
1354
1355         if (option_verbose > 1)
1356                 ast_verbose(VERBOSE_PREFIX_2 "%s: Hangup complete\n", ast->name);
1357
1358         restart_monitor();
1359         ast_mutex_unlock(&p->lock);
1360         return 0;
1361 }
1362
1363 static int vpb_answer(struct ast_channel *ast)
1364 {
1365         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1366         VPB_EVENT je;
1367         int ret;
1368         ast_mutex_lock(&p->lock);
1369
1370         if (option_verbose > 3)
1371                         ast_verbose(VERBOSE_PREFIX_4 "%s: Answering channel\n",p->dev);
1372
1373         if (ast->_state != AST_STATE_UP) {
1374                 if (p->mode == MODE_FXO){
1375                         vpb_sethook_sync(p->handle, VPB_OFFHOOK);
1376                         p->state=VPB_STATE_OFFHOOK;
1377                         vpb_sleep(500);
1378                         ret = vpb_get_event_ch_async(p->handle,&je);
1379                         if ((ret == VPB_OK)&&(je.type != VPB_DROP)){
1380                                 if (option_verbose > 3){
1381                                                 ast_verbose(VERBOSE_PREFIX_4 "%s: Answer collected a wrong event!!\n",p->dev);
1382                                 }
1383                                 vpb_put_event(&je);
1384                         }
1385                 }
1386                 ast_setstate(ast, AST_STATE_UP);
1387
1388                 if(option_verbose>1)
1389                         ast_verbose( VERBOSE_PREFIX_2 "%s: Answered call from %s on %s [%s]\n", p->dev,
1390                                         p->owner->callerid, ast->name,(p->mode == MODE_FXO)?"FXO":"FXS");
1391
1392                 ast->rings = 0;
1393                 if( !p->readthread ){
1394                         pthread_create(&p->readthread, NULL, do_chanreads, (void *)p);
1395                 } else {
1396                         if(option_verbose>3)
1397                                 ast_verbose(VERBOSE_PREFIX_4 "%s: Record thread already running!!\n",p->dev);
1398                 }
1399         } else {
1400                 if(option_verbose>3) {
1401                         ast_verbose(VERBOSE_PREFIX_4 "%s: Answered state is up\n",p->dev);
1402                 }
1403         }
1404         ast_mutex_unlock(&p->lock);
1405         return 0;
1406 }
1407
1408 static struct ast_frame  *vpb_read(struct ast_channel *ast)
1409 {
1410         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1411         static struct ast_frame f = {AST_FRAME_NULL};
1412
1413         f.src = type;
1414         ast_log(LOG_NOTICE, "vpb_read should never be called (chan=%s)!\n", p->dev);
1415
1416         return &f;
1417 }
1418
1419 static inline int ast2vpbformat(int ast_format)
1420 {
1421         switch(ast_format) {
1422                 case AST_FORMAT_ALAW:
1423                         return VPB_ALAW;
1424                 case AST_FORMAT_SLINEAR:
1425                         return VPB_LINEAR;
1426                 case AST_FORMAT_ULAW:
1427                         return VPB_MULAW;
1428                 case AST_FORMAT_ADPCM:
1429                         return VPB_OKIADPCM;
1430                 default:
1431                         return -1;
1432         }
1433 }
1434
1435 static inline int astformatbits(int ast_format)
1436 {
1437         switch(ast_format) {
1438                 case AST_FORMAT_ALAW:
1439                 case AST_FORMAT_ULAW:
1440                         return 8;
1441                 case AST_FORMAT_SLINEAR:
1442                         return 16;
1443                 case AST_FORMAT_ADPCM:
1444                         return 4;
1445                 default:
1446                         return 8;
1447         }
1448 }
1449
1450 int gain_vector(float g, short *v, int n)
1451 {
1452         int i;
1453         float tmp;
1454         for ( i = 0; i<n; i++) {
1455                 tmp = g*v[i];
1456                 if (tmp > 32767.0)
1457                         tmp = 32767.0;
1458                 if (tmp < -32768.0)
1459                         tmp = -32768.0;
1460                 v[i] = (short)tmp;
1461         }
1462         return(i);
1463 }
1464
1465 static int vpb_write(struct ast_channel *ast, struct ast_frame *frame)
1466 {
1467         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1468         int res = 0, fmt = 0;
1469         ast_mutex_lock(&p->lock);
1470         if(option_verbose>5)
1471                 ast_verbose( VERBOSE_PREFIX_4 "%s: Writing to channel\n", p->dev);
1472
1473         if (frame->frametype != AST_FRAME_VOICE) {
1474                 if(option_verbose>3)
1475                         ast_verbose( VERBOSE_PREFIX_4 "%s: Don't know how to handle from type %d\n", ast->name, frame->frametype);
1476                 ast_mutex_unlock(&p->lock);
1477                 return 0;
1478         } else if (ast->_state != AST_STATE_UP) {
1479                 if(option_verbose>3)
1480                         ast_verbose( VERBOSE_PREFIX_4 "%s: Attempt to Write frame type[%d]subclass[%d] on not up chan\n",ast->name, frame->frametype, frame->subclass);
1481                 p->lastoutput = -1;
1482                 ast_mutex_unlock(&p->lock);
1483                 return 0;
1484         }
1485
1486         fmt = ast2vpbformat(frame->subclass);
1487         if (fmt < 0) {
1488                 ast_log(LOG_WARNING, "%s: vpb_write Cannot handle frames of %d format!\n",ast->name, frame->subclass);
1489                 return -1;
1490         }
1491
1492         ast_mutex_lock(&p->play_lock);
1493
1494         if (p->lastoutput == -1) {
1495                 vpb_play_buf_start(p->handle, fmt);
1496                 if(option_verbose>1)
1497                         ast_verbose( VERBOSE_PREFIX_2 "%s: Starting play mode (codec=%d)\n",p->dev,fmt);
1498         } else if (p->lastoutput != fmt) {
1499                 vpb_play_buf_finish(p->handle);
1500                 vpb_play_buf_start(p->handle, fmt);
1501                 if(option_verbose>1)
1502                         ast_verbose( VERBOSE_PREFIX_2 "%s: Changed play format (%d=>%d)\n",p->dev,p->lastoutput,fmt);
1503         }
1504
1505         p->lastoutput = fmt;
1506
1507         // Apply extra gain !
1508         if( p->txswgain > MAX_VPB_GAIN )
1509                 gain_vector(p->txswgain - MAX_VPB_GAIN , (short*)frame->data, frame->datalen/sizeof(short));
1510
1511         res = vpb_play_buf_sync(p->handle, (char*)frame->data, frame->datalen);
1512         if( (res == VPB_OK) && (option_verbose > 5) ) {
1513                 short * data = (short*)frame->data;
1514                 ast_verbose("%s: Write chan (codec=%d) %d %d\n", p->dev, fmt, data[0],data[1]);
1515         }
1516
1517         ast_mutex_unlock(&p->play_lock);
1518         ast_mutex_unlock(&p->lock);
1519         return 0;
1520 }
1521
1522 /* Read monitor thread function. */
1523 static void *do_chanreads(void *pvt)
1524 {
1525         struct vpb_pvt *p = (struct vpb_pvt *)pvt;
1526         struct ast_frame *fr = &p->fr;
1527         char *readbuf = ((char *)p->buf) + AST_FRIENDLY_OFFSET;
1528         int bridgerec = 0;
1529         int afmt, readlen, res, fmt;
1530         int ignore_dtmf;
1531         char * getdtmf_var = NULL;
1532
1533         fr->frametype = AST_FRAME_VOICE;
1534         fr->src = type;
1535         fr->mallocd = 0;
1536         fr->samples = VPB_SAMPLES;
1537         fr->offset = AST_FRIENDLY_OFFSET;
1538         memset(p->buf, 0, sizeof p->buf);
1539
1540         if (option_verbose > 4) {
1541                 ast_verbose("%s: chanreads: starting thread\n", p->dev);
1542         }
1543         ast_mutex_lock(&p->record_lock);
1544
1545         p->stopreads = 0;
1546         while (!p->stopreads && p->owner) {
1547
1548                 ast_mutex_lock(&p->lock); {
1549                         if (option_verbose > 4) {
1550                                 ast_verbose("%s: chanreads: Checking bridge \n", p->dev);
1551                         }
1552                         if (p->bridge) {
1553                                 if (p->bridge->c0 == p->owner && (p->bridge->flags & AST_BRIDGE_REC_CHANNEL_0))
1554                                         bridgerec = 1;
1555                                 else if (p->bridge->c1 == p->owner && (p->bridge->flags & AST_BRIDGE_REC_CHANNEL_1))
1556                                         bridgerec = 1;
1557                                 else
1558                                         bridgerec = 0;
1559                         } else {
1560                                 bridgerec = 1;
1561                         }
1562                 } ast_mutex_unlock(&p->lock);
1563
1564                 if ( (p->owner->_state != AST_STATE_UP) || !bridgerec) {
1565                         if (option_verbose > 4) {
1566                                 ast_verbose("%s: chanreads: owner not up[%d] or no bridgerec[%d]\n", p->dev,p->owner->_state,bridgerec);
1567                         }
1568                         vpb_sleep(10);
1569                         continue;
1570                 }
1571
1572                 // Voicetronix DTMF detection can be triggered off ordinary speech
1573                 // This leads to annoying beeps during the conversation
1574                 // Avoid this problem by just setting VPB_GETDTMF when you want to listen for DTMF
1575                 //ignore_dtmf = 1;
1576                 ignore_dtmf = 0; /* set this to 1 to turn this feature on */
1577                 getdtmf_var = pbx_builtin_getvar_helper(p->owner,"VPB_GETDTMF");
1578                 if( getdtmf_var && ( strcasecmp( getdtmf_var, "yes" ) == 0 ) )
1579                         ignore_dtmf = 0;
1580
1581                 if( ignore_dtmf != p->last_ignore_dtmf ) {
1582                         if(option_verbose>1)
1583                                 ast_verbose( VERBOSE_PREFIX_2 "%s:Now %s DTMF \n",
1584                                         p->dev, ignore_dtmf ? "ignoring" : "listening for");
1585                         vpb_set_event_mask(p->handle, ignore_dtmf ? VPB_EVENTS_NODTMF : VPB_EVENTS_ALL );
1586                 }
1587                 p->last_ignore_dtmf = ignore_dtmf;
1588
1589                 // Play DTMF digits here to avoid problem you get if playing a digit during
1590                 // a record operation
1591                 if (option_verbose > 4) {
1592                         ast_verbose("%s: chanreads: Checking dtmf's \n", p->dev);
1593                 }
1594                 ast_mutex_lock(&p->play_dtmf_lock);
1595                 if( p->play_dtmf[0] ) {
1596                         // Try to ignore DTMF event we get after playing digit
1597                         // This DTMF is played by asterisk and leads to an annoying trailing beep on CISCO phones
1598                         if( !ignore_dtmf)
1599                                 vpb_set_event_mask(p->handle, VPB_EVENTS_NODTMF );
1600                         vpb_dial_sync(p->handle,p->play_dtmf);
1601                         if(option_verbose>1)
1602                                 ast_verbose( VERBOSE_PREFIX_2 "%s: Played DTMF %s\n",p->dev,p->play_dtmf);
1603                         p->play_dtmf[0] = '\0';
1604                         ast_mutex_unlock(&p->play_dtmf_lock);
1605                         vpb_sleep(700); // Long enough to miss echo and DTMF event
1606                         if( !ignore_dtmf)
1607                                 vpb_set_event_mask(p->handle, VPB_EVENTS_ALL );
1608                         continue;
1609                 }
1610                 ast_mutex_unlock(&p->play_dtmf_lock);
1611
1612                 afmt = (p->owner) ? p->owner->pvt->rawreadformat : AST_FORMAT_SLINEAR;
1613                 fmt = ast2vpbformat(afmt);
1614                 if (fmt < 0) {
1615                         ast_log(LOG_WARNING,"%s: Record failure (unsupported format %d)\n", p->dev, afmt);
1616                         return NULL;
1617                 }
1618                 readlen = VPB_SAMPLES * astformatbits(afmt) / 8;
1619
1620                 if (p->lastinput == -1) {
1621                         vpb_record_buf_start(p->handle, fmt);
1622                         vpb_reset_record_fifo_alarm(p->handle);
1623                         if(option_verbose>1)
1624                                 ast_verbose( VERBOSE_PREFIX_2 "%s: Starting record mode (codec=%d)\n",p->dev,fmt);
1625                 } else if (p->lastinput != fmt) {
1626                         vpb_record_buf_finish(p->handle);
1627                         vpb_record_buf_start(p->handle, fmt);
1628                         if(option_verbose>1)
1629                                 ast_verbose( VERBOSE_PREFIX_2 "%s: Changed record format (%d=>%d)\n",p->dev,p->lastinput,fmt);
1630                 }
1631                 p->lastinput = fmt;
1632
1633                 /* Read only if up and not bridged, or a bridge for which we can read. */
1634                 if (option_verbose > 4) {
1635                         ast_verbose("%s: chanreads: getting buffer!\n", p->dev);
1636                 }
1637                 if( (res = vpb_record_buf_sync(p->handle, readbuf, readlen) ) == VPB_OK ) {
1638                         if (option_verbose > 4) {
1639                                 ast_verbose("%s: chanreads: got buffer!\n", p->dev);
1640                         }
1641                         // Apply extra gain !
1642                         if( p->rxswgain > MAX_VPB_GAIN )
1643                                 gain_vector(p->rxswgain - MAX_VPB_GAIN , (short*)readbuf, readlen/sizeof(short));
1644                         if (option_verbose > 4) {
1645                                 ast_verbose("%s: chanreads: applied gain\n", p->dev);
1646                         }
1647
1648                         fr->subclass = afmt;
1649                         fr->data = readbuf;
1650                         fr->datalen = readlen;
1651
1652                         // Using trylock here to prevent deadlock when channel is hungup
1653                         // (ast_hangup() immediately gets lock)
1654                         if (p->owner && !p->stopreads ) {
1655                                 if (option_verbose > 4) {
1656                                         ast_verbose("%s: chanreads: queueing buffer on frame (state[%d])\n", p->dev,p->owner->_state);
1657                                 }
1658
1659                                 if (ast_mutex_trylock(&p->owner->lock)==0)  {
1660                                         ast_queue_frame(p->owner, fr);
1661                                         ast_mutex_unlock(&p->owner->lock);
1662                                 } else {
1663                                         if (option_verbose > 3)
1664                                                 ast_verbose("%s: Couldnt get lock on owner channel to send frame!\n", p->dev);
1665                                 }
1666                                 if (option_verbose > 5) {
1667                                         short * data = (short*)readbuf;
1668                                         ast_verbose("%s: Read channel (codec=%d) %d %d\n", p->dev, fmt, data[0], data[1] );
1669                                 }
1670                         }
1671                         else {
1672                                 if (option_verbose > 4) {
1673                                         ast_verbose("%s: p->stopreads[%d] p->owner[%p]\n", p->dev, p->stopreads,(void *)p->owner);
1674                                 }
1675                         }
1676                 } else {
1677                         ast_log(LOG_WARNING,"%s: Record failure (%s)\n", p->dev, vpb_strerror(res));
1678                         vpb_record_buf_finish(p->handle);
1679                         vpb_record_buf_start(p->handle, fmt);
1680                 }
1681         }
1682
1683         /* When stopreads seen, go away! */
1684         vpb_record_buf_finish(p->handle);
1685         ast_mutex_unlock(&p->record_lock);
1686
1687         if (option_verbose > 1)
1688                 ast_verbose(VERBOSE_PREFIX_2 "%s: Ending record mode (%d/%s)\n",
1689                          p->dev, p->stopreads, p->owner? "yes" : "no");
1690         return NULL;
1691 }
1692
1693 static struct ast_channel *vpb_new(struct vpb_pvt *i, int state, char *context)
1694 {
1695         struct ast_channel *tmp;
1696
1697         if (i->owner) {
1698             ast_log(LOG_WARNING, "Called vpb_new on owned channel (%s) ?!\n", i->dev);
1699             return NULL;
1700         }
1701
1702         tmp = ast_channel_alloc(1);
1703         if (tmp) {
1704                 strncpy(tmp->name, i->dev, sizeof(tmp->name));
1705                 tmp->type = type;
1706
1707                 // Linear is the preferred format. Although Voicetronix supports other formats
1708                 // they are all converted to/from linear in the vpb code. Best for us to use
1709                 // linear since we can then adjust volume in this modules.
1710                 tmp->nativeformats = prefformat;
1711                 tmp->pvt->rawreadformat = AST_FORMAT_SLINEAR;
1712                 tmp->pvt->rawwriteformat =  AST_FORMAT_SLINEAR;
1713                 ast_setstate(tmp, state);
1714                 if (state == AST_STATE_RING)
1715                         tmp->rings = 1;
1716                 tmp->pvt->pvt = i;
1717                 /* set call backs */
1718                 tmp->pvt->send_digit = vpb_digit;
1719                 tmp->pvt->call = vpb_call;
1720                 tmp->pvt->hangup = vpb_hangup;
1721                 tmp->pvt->answer = vpb_answer;
1722                 tmp->pvt->read = vpb_read;
1723                 tmp->pvt->write = vpb_write;
1724                 tmp->pvt->bridge = vpb_bridge;
1725                 tmp->pvt->indicate = vpb_indicate;
1726                 tmp->pvt->fixup = vpb_fixup;
1727
1728                 strncpy(tmp->context, context, sizeof(tmp->context)-1);
1729                 if (strlen(i->ext))
1730                         strncpy(tmp->exten, i->ext, sizeof(tmp->exten)-1);
1731                 else
1732                         strncpy(tmp->exten, "s",  sizeof(tmp->exten) - 1);
1733                 if (strlen(i->language))
1734                         strncpy(tmp->language, i->language, sizeof(tmp->language)-1);
1735
1736                 i->owner = tmp;
1737
1738                 i->bridge = NULL;
1739                 i->lastoutput = -1;
1740                 i->lastinput = -1;
1741                 i->last_ignore_dtmf = 1;
1742                 i->readthread = 0;
1743                 i->play_dtmf[0] = '\0';
1744
1745                 i->lastgrunt  = get_time_in_ms(); /* Assume at least one grunt tone seen now. */
1746
1747                 ast_mutex_lock(&usecnt_lock);
1748                 usecnt++;
1749                 ast_mutex_unlock(&usecnt_lock);
1750                 ast_update_use_count();
1751                 if (state != AST_STATE_DOWN) {
1752                         if (ast_pbx_start(tmp)) {
1753                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
1754                                 ast_hangup(tmp);
1755                         }
1756                 }
1757         } else {
1758                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
1759         }
1760         return tmp;
1761 }
1762
1763 static struct ast_channel *vpb_request(char *type, int format, void *data)
1764 {
1765         int oldformat;
1766         struct vpb_pvt *p;
1767         struct ast_channel *tmp = NULL;
1768         char *name = strdup(data ? (char *)data : "");
1769         char *s, *sepstr;
1770         int group=-1;
1771
1772         oldformat = format;
1773         format &= prefformat;
1774         if (!format) {
1775                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", oldformat);
1776                 return NULL;
1777         }
1778
1779         sepstr = name;
1780         s = strsep(&sepstr, "/"); /* Handle / issues */
1781         if (!s)
1782                 s = "";
1783         /* Check if we are looking for a group */
1784         if (toupper(name[0]) == 'G' || toupper(name[0])=='R') {
1785                 group=atoi(name+1);
1786         }
1787         /* Search for an unowned channel */
1788         ast_mutex_lock(&iflock); {
1789                 p = iflist;
1790                 while(p) {
1791                         if (group == -1){
1792                                 if (strncmp(s, p->dev + 4, sizeof p->dev) == 0) {
1793                                         if (!p->owner) {
1794                                                 tmp = vpb_new(p, AST_STATE_DOWN, p->context);
1795                                                 break;
1796                                         }
1797                                 }
1798                         }
1799                         else {
1800                                 if ((p->group == group) && (!p->owner)) {
1801                                         tmp = vpb_new(p, AST_STATE_DOWN, p->context);
1802                                         break;
1803                                 }
1804                         }
1805                         p = p->next;
1806                 }
1807         } ast_mutex_unlock(&iflock);
1808
1809
1810         if (option_verbose > 1)
1811                 ast_verbose(VERBOSE_PREFIX_2 " %s requested, got: [%s]\n",
1812                 name, tmp ? tmp->name : "None");
1813
1814         free(name);
1815
1816         restart_monitor();
1817         return tmp;
1818 }
1819
1820 static float parse_gain_value(char *gain_type, char *value)
1821 {
1822         float gain;
1823
1824         /* try to scan number */
1825         if (sscanf(value, "%f", &gain) != 1)
1826         {
1827                 ast_log(LOG_ERROR, "Invalid %s value '%s' in '%s' config\n", value, gain_type, config);
1828                 return DEFAULT_GAIN;
1829         }
1830
1831
1832         /* percentage? */
1833         //if (value[strlen(value) - 1] == '%')
1834         //      return gain / (float)100;
1835
1836         return gain;
1837 }
1838
1839 int load_module()
1840 {
1841         struct ast_config *cfg;
1842         struct ast_variable *v;
1843         struct vpb_pvt *tmp;
1844         int board = 0, group = 0;
1845         int mode = MODE_IMMEDIATE;
1846         float txgain = DEFAULT_GAIN, rxgain = DEFAULT_GAIN;
1847         float txswgain = 0, rxswgain = 0;
1848         int first_channel = 1;
1849         int echo_cancel = DEFAULT_ECHO_CANCEL;
1850         int error = 0; /* Error flag */
1851         int bal1 = -1; // Special value - means do not set
1852         int bal2 = -1;
1853         int bal3 = -1;
1854         char * callerid = NULL;
1855
1856         cfg = ast_load(config);
1857
1858         /* We *must* have a config file otherwise stop immediately */
1859         if (!cfg) {
1860                 ast_log(LOG_ERROR, "Unable to load config %s\n", config);
1861                 return -1;
1862         }
1863
1864         vpb_seterrormode(VPB_ERROR_CODE);
1865
1866         ast_mutex_lock(&iflock); {
1867                 v = ast_variable_browse(cfg, "interfaces");
1868                 while(v) {
1869                         /* Create the interface list */
1870                         if (strcasecmp(v->name, "board") == 0) {
1871                                 board = atoi(v->value);
1872                         } else  if (strcasecmp(v->name, "group") == 0){
1873                                 group = atoi(v->value);
1874                         } else  if (strcasecmp(v->name, "useloopdrop") == 0){
1875                                 UseLoopDrop = atoi(v->value);
1876                         } else if (strcasecmp(v->name, "channel") == 0) {
1877                                 int channel = atoi(v->value);
1878                                 tmp = mkif(board, channel, mode, txgain, rxgain, txswgain, rxswgain, bal1, bal2, bal3, callerid, echo_cancel,group);
1879                                 if (tmp) {
1880                                         if(first_channel) {
1881                                                 mkbrd( tmp->vpb_model, echo_cancel );
1882                                                 first_channel = 0;
1883                                         }
1884                                         tmp->next = iflist;
1885                                         iflist = tmp;
1886                                 } else {
1887                                         ast_log(LOG_ERROR,
1888                                         "Unable to register channel '%s'\n", v->value);
1889                                         error = -1;
1890                                         goto done;
1891                                 }
1892                                 callerid = NULL;
1893                         } else if (strcasecmp(v->name, "language") == 0) {
1894                                 strncpy(language, v->value, sizeof(language)-1);
1895                         } else if (strcasecmp(v->name, "callerid") == 0) {
1896                                 callerid = strdup(v->value);
1897                         } else if (strcasecmp(v->name, "mode") == 0) {
1898                                 if (strncasecmp(v->value, "di", 2) == 0)
1899                                         mode = MODE_DIALTONE;
1900                                 else if (strncasecmp(v->value, "im", 2) == 0)
1901                                         mode = MODE_IMMEDIATE;
1902                                 else if (strncasecmp(v->value, "fx", 2) == 0)
1903                                         mode = MODE_FXO;
1904                                 else
1905                                         ast_log(LOG_WARNING, "Unknown mode: %s\n", v->value);
1906                         } else if (!strcasecmp(v->name, "context")) {
1907                                 strncpy(context, v->value, sizeof(context)-1);
1908                         } else if (!strcasecmp(v->name, "echocancel")) {
1909                                 if (!strcasecmp(v->value, "off"))
1910                                         echo_cancel = 0;
1911                         } else if (strcasecmp(v->name, "txgain") == 0) {
1912                                 txswgain = parse_gain_value(v->name, v->value);
1913                         } else if (strcasecmp(v->name, "rxgain") == 0) {
1914                                 rxswgain = parse_gain_value(v->name, v->value);
1915                         } else if (strcasecmp(v->name, "txhwgain") == 0) {
1916                                 txgain = parse_gain_value(v->name, v->value);
1917                         } else if (strcasecmp(v->name, "rxhwgain") == 0) {
1918                                 rxgain = parse_gain_value(v->name, v->value);
1919                         } else if (strcasecmp(v->name, "bal1") == 0) {
1920                                 bal1 = strtol(v->value, NULL, 16);
1921                                 if(bal1<0 || bal1>255) {
1922                                         ast_log(LOG_WARNING, "Bad bal1 value: %d\n", bal1);
1923                                         bal1 = -1;
1924                                 }
1925                         } else if (strcasecmp(v->name, "bal2") == 0) {
1926                                 bal2 = strtol(v->value, NULL, 16);
1927                                 if(bal2<0 || bal2>255) {
1928                                         ast_log(LOG_WARNING, "Bad bal2 value: %d\n", bal2);
1929                                         bal2 = -1;
1930                                 }
1931                         } else if (strcasecmp(v->name, "bal3") == 0) {
1932                                 bal3 = strtol(v->value, NULL, 16);
1933                                 if(bal3<0 || bal3>255) {
1934                                         ast_log(LOG_WARNING, "Bad bal3 value: %d\n", bal3);
1935                                         bal3 = -1;
1936                                 }
1937                         } else if (strcasecmp(v->name, "grunttimeout") == 0) {
1938                                 gruntdetect_timeout = 1000*atoi(v->value);
1939                         }
1940                         v = v->next;
1941                 }
1942
1943                 if (gruntdetect_timeout < 1000)
1944                         gruntdetect_timeout = 1000;
1945
1946                 done: (void)0;
1947         } ast_mutex_unlock(&iflock);
1948
1949         ast_destroy(cfg);
1950
1951         if (!error && ast_channel_register(type, tdesc, prefformat, vpb_request) != 0) {
1952                 ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
1953                 error = -1;
1954         }
1955
1956
1957         if (error)
1958                 unload_module();
1959         else
1960                 restart_monitor(); /* And start the monitor for the first time */
1961
1962         return error;
1963 }
1964
1965
1966 int unload_module()
1967 {
1968         struct vpb_pvt *p;
1969         /* First, take us out of the channel loop */
1970         ast_channel_unregister(type);
1971
1972         ast_mutex_lock(&iflock); {
1973                 /* Hangup all interfaces if they have an owner */
1974                 p = iflist;
1975                 while(p) {
1976                         if (p->owner)
1977                                 ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
1978                         p = p->next;
1979                 }
1980                 iflist = NULL;
1981         } ast_mutex_unlock(&iflock);
1982
1983         ast_mutex_lock(&monlock); {
1984                 if (mthreadactive > -1) {
1985                         pthread_cancel(monitor_thread);
1986                         pthread_join(monitor_thread, NULL);
1987                 }
1988                 mthreadactive = -2;
1989         } ast_mutex_unlock(&monlock);
1990
1991         ast_mutex_lock(&iflock); {
1992                 /* Destroy all the interfaces and free their memory */
1993
1994                 while(iflist) {
1995                         p = iflist;
1996                         ast_mutex_destroy(&p->lock);
1997                         pthread_cancel(p->readthread);
1998                         ast_mutex_destroy(&p->record_lock);
1999                         ast_mutex_destroy(&p->play_lock);
2000                         ast_mutex_destroy(&p->play_dtmf_lock);
2001                         p->readthread = 0;
2002
2003                         vpb_close(p->handle);
2004
2005                         iflist = iflist->next;
2006
2007                         free(p);
2008                 }
2009                 iflist = NULL;
2010         } ast_mutex_unlock(&iflock);
2011
2012         ast_mutex_lock(&bridge_lock); {
2013                 memset(bridges, 0, sizeof bridges);
2014         } ast_mutex_unlock(&bridge_lock);
2015         ast_mutex_destroy(&bridge_lock);
2016         free(bridges);
2017
2018         return 0;
2019 }
2020
2021 int usecount()
2022 {
2023         int res;
2024         ast_mutex_lock(&usecnt_lock);
2025         res = usecnt;
2026         ast_mutex_unlock(&usecnt_lock);
2027         return res;
2028 }
2029
2030 char *description()
2031 {
2032         return desc;
2033 }
2034
2035 char *key()
2036 {
2037         return ASTERISK_GPL_KEY;
2038 }
2039
2040 #if defined(__cplusplus) || defined(c_plusplus)
2041  }
2042 #endif