/ updated locking
[asterisk/asterisk.git] / 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 5200
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_restart(p->busy_timer);
507                                 f.frametype = -1;
508                         } else if (e->data == p->ringback_timer_id) {
509                                 playtone(p->handle, &Ringbacktone);
510                                 vpb_timer_restart(p->ringback_timer);
511                                 f.frametype = -1;
512                         } else {
513                                 f.frametype = -1; /* Ignore. */
514                         }
515                         break;
516
517                 case VPB_DTMF:
518                         if (p->owner->_state == AST_STATE_UP) {
519                                 f.frametype = AST_FRAME_DTMF;
520                                 f.subclass = e->data;
521                         } else
522                                 f.frametype = -1;
523                         break;
524
525                 case VPB_TONEDETECT:
526                         if (e->data == VPB_BUSY || e->data == VPB_BUSY_308 || e->data == VPB_BUSY_AUST ) {
527                                 f.subclass = AST_CONTROL_HANGUP;
528                                 if (p->owner->_state == AST_STATE_UP) {
529                                         f.subclass = AST_CONTROL_HANGUP;
530                                 }
531                                 else {
532                                         f.subclass = AST_CONTROL_BUSY;
533                                 }
534                         } else if (e->data == VPB_GRUNT) {
535                                 if( ( get_time_in_ms() - p->lastgrunt ) > gruntdetect_timeout ) {
536                                         // Nothing heard on line for a very long time
537                                         // Timeout connection
538                                         if (option_verbose > 2) 
539                                                 ast_verbose(VERBOSE_PREFIX_3 "grunt timeout\n");
540                                         ast_log(LOG_NOTICE,"%s: Line hangup due of lack of conversation\n",p->dev); 
541                                         f.subclass = AST_CONTROL_HANGUP;
542                                 } else {
543                                         p->lastgrunt = get_time_in_ms();
544                                         f.frametype = -1;
545                                 }
546                         } else
547                                 f.frametype = -1;
548                         break;
549
550                 case VPB_CALLEND:
551                         #ifdef DIAL_WITH_CALL_PROGRESS
552                         if (e->data == VPB_CALL_CONNECTED) 
553                                 f.subclass = AST_CONTROL_ANSWER;
554                         else if (e->data == VPB_CALL_NO_DIAL_TONE || e->data == VPB_CALL_NO_RING_BACK)
555                                 f.subclass =  AST_CONTROL_CONGESTION;
556                         else if (e->data == VPB_CALL_NO_ANSWER || e->data == VPB_CALL_BUSY)
557                                 f.subclass = AST_CONTROL_BUSY;
558                         else if (e->data  == VPB_CALL_DISCONNECTED) 
559                                 f.subclass = AST_CONTROL_HANGUP;
560                         #else
561                         ast_log(LOG_NOTICE,"%s: Got call progress callback but blind dialing \n", p->dev); 
562                         f.frametype = -1;
563                         #endif
564                         break;
565
566                 case VPB_STATION_OFFHOOK:
567                         f.subclass = AST_CONTROL_ANSWER;
568                         break;
569
570                 /* not sure why this was commented out */         
571                 case VPB_DROP:
572                         if ((p->mode == MODE_FXO)&&(UseLoopDrop)){ /* ignore loop drop on stations */
573                                 if (p->owner->_state == AST_STATE_UP) 
574                                         f.subclass = AST_CONTROL_HANGUP;
575                                 else
576                                         f.frametype = -1;
577                         }
578                         break;
579                 /* */     
580                 case VPB_STATION_ONHOOK:
581                         f.subclass = AST_CONTROL_HANGUP;
582                         break;
583
584                 case VPB_STATION_FLASH:
585                         f.subclass = AST_CONTROL_FLASH;
586                         break;
587
588                 // Called when dialing has finished and ringing starts
589                 // No indication that call has really been answered when using blind dialing
590                 case VPB_DIALEND:
591                         f.subclass = AST_CONTROL_ANSWER;
592                         if (option_verbose > 1) 
593                                 ast_verbose(VERBOSE_PREFIX_2 "%s: Dialend\n", p->dev);
594                         break;
595
596                 case VPB_PLAY_UNDERFLOW:
597                         f.frametype = -1;
598                         vpb_reset_play_fifo_alarm(p->handle);
599                         break;
600
601                 case VPB_RECORD_OVERFLOW:
602                         f.frametype = -1;
603                         vpb_reset_record_fifo_alarm(p->handle);
604                         break;
605
606                 default:
607                         f.frametype = -1;
608                         break;
609         }
610
611         if (option_verbose > 3) 
612                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_owned: putting frame type[%d]subclass[%d], bridge=%p\n",
613                         p->dev, f.frametype, f.subclass, (void *)p->bridge);
614
615         ast_mutex_lock(&p->lock); {
616                 if (p->bridge) { /* Check what happened, see if we need to report it. */
617                         switch (f.frametype) {
618                                 case AST_FRAME_DTMF:
619                                         if (!(p->bridge->c0 == p->owner && 
620                                                         (p->bridge->flags & AST_BRIDGE_DTMF_CHANNEL_0) ) &&
621                                                         !(p->bridge->c1 == p->owner && 
622                                                         (p->bridge->flags & AST_BRIDGE_DTMF_CHANNEL_1) )) 
623                                                 /* Kill bridge, this is interesting. */
624                                                 endbridge = 1;
625                                         break;
626
627                                 case AST_FRAME_CONTROL:
628                                         if (!(p->bridge->flags & AST_BRIDGE_IGNORE_SIGS)) 
629                                         #if 0
630                                         if (f.subclass == AST_CONTROL_BUSY ||
631                                         f.subclass == AST_CONTROL_CONGESTION ||
632                                         f.subclass == AST_CONTROL_HANGUP ||
633                                         f.subclass == AST_CONTROL_FLASH)
634                                         #endif
635                                                 endbridge = 1;
636                                         break;
637
638                                 default:
639                                         break;
640                         }
641                         if (endbridge) {
642                                 if (p->bridge->fo)
643                                         *p->bridge->fo = ast_frisolate(&f);
644                                 if (p->bridge->rc)
645                                         *p->bridge->rc = p->owner;
646
647                                 ast_mutex_lock(&p->bridge->lock); {
648                                         p->bridge->endbridge = 1;
649                                         pthread_cond_signal(&p->bridge->cond);
650                                 } ast_mutex_unlock(&p->bridge->lock);                      
651                         }         
652                 }
653         } ast_mutex_unlock(&p->lock);
654
655         if (endbridge) return 0;
656
657         // Trylock used here to avoid deadlock that can occur if we
658         // happen to be in here handling an event when hangup is called
659         // Problem is that hangup holds p->owner->lock
660         if (f.frametype >= 0 && f.frametype != AST_FRAME_NULL) {
661                 if (ast_mutex_trylock(&p->owner->lock)==0)  {
662                         ast_queue_frame(p->owner, &f);
663                         ast_mutex_unlock(&p->owner->lock);
664                 } else {
665                         ast_verbose("%s: handled_owned: Missed event %d/%d \n",
666                                 p->dev,f.frametype, f.subclass);
667                 }
668         }
669
670         return 0;
671 }
672
673 static inline int monitor_handle_notowned(struct vpb_pvt *p, VPB_EVENT *e)
674 {
675         char s[2] = {0};
676
677         if (option_verbose > 3) {
678                 char str[VPB_MAX_STR];
679                 vpb_translate_event(e, str);
680                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: mode=%d, event[%d][%s]=[%d]\n",
681                         p->dev, p->mode, e->type,str, e->data);
682         }
683
684         switch(e->type) {
685                 case VPB_RING:
686                         if (p->mode == MODE_FXO) /* FXO port ring, start * */ {
687                                 vpb_new(p, AST_STATE_RING, p->context);
688                                 get_callerid(p);        /* Australian Caller ID only between 1st and 2nd ring */
689                         }
690                         break;
691
692                 case VPB_RING_OFF:
693                         break;
694
695                 case VPB_STATION_OFFHOOK:
696                         if (p->mode == MODE_IMMEDIATE) 
697                                 vpb_new(p,AST_STATE_RING, p->context);
698                         else {
699                                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: playing dialtone\n",p->dev);
700                                 playtone(p->handle, &Dialtone);
701                                 p->wantdtmf = 1;
702                                 p->ext[0] = 0;  /* Just to be sure & paranoid.*/
703                                 p->state=VPB_STATE_PLAYDIAL;
704                         }
705                         break;
706
707                 case VPB_DIALEND:
708                         if (p->mode == MODE_DIALTONE){
709                                 if (p->state == VPB_STATE_PLAYDIAL) {
710                                         playtone(p->handle, &Dialtone);
711                                         p->wantdtmf = 1;
712                                         p->ext[0] = 0;  // Just to be sure & paranoid.
713                                 }
714                                 /* These are not needed as they have timers to restart them
715                                 else if (p->state == VPB_STATE_PLAYBUSY) {
716                                         playtone(p->handle, &Busytone);
717                                         p->wantdtmf = 1;
718                                         p->ext[0] = 0;  // Just to be sure & paranoid.
719                                 }
720                                 else if (p->state == VPB_STATE_PLAYRING) {
721                                         playtone(p->handle, &Ringbacktone);
722                                         p->wantdtmf = 1;
723                                         p->ext[0] = 0;  // Just to be sure & paranoid.
724                                 }
725                                 */
726                         } else {
727                                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: Got a DIALEND when not really expected\n",p->dev);
728                         }
729                         break;
730
731                 case VPB_STATION_ONHOOK:        /* clear ext */
732                         stoptone(p->handle);
733                         p->wantdtmf = 1 ;
734                         p->ext[0] = 0;
735                         p->state=VPB_STATE_ONHOOK;
736                         break;
737
738                 case VPB_DTMF:
739                         if (p->state == VPB_STATE_ONHOOK){
740                                 /* DTMF's being passed while on-hook maybe Caller ID */
741                                 break;
742                         }
743                         if (p->wantdtmf == 1) {
744                                 stoptone(p->handle);
745                                 p->wantdtmf = 0;
746                         }
747                         p->state=VPB_STATE_GETDTMF;
748                         s[0] = e->data;
749                         strcat(p->ext, s);
750                         if (ast_exists_extension(NULL, p->context, p->ext, 1, p->callerid)){
751                                 vpb_new(p,AST_STATE_RING, p->context);
752                         } else if (!ast_canmatch_extension(NULL, p->context, p->ext, 1, p->callerid)){
753                                 if (ast_exists_extension(NULL, "default", p->ext, 1, p->callerid)) {
754                                         vpb_new(p,AST_STATE_RING, "default");         
755                                 } else if (!ast_canmatch_extension(NULL, "default", p->ext, 1, p->callerid)) {
756                                         if (option_verbose > 3) {
757                                                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: can't match anything in %s or default\n",
758                                                          p->dev, p->context);
759                                         }
760                                         playtone(p->handle, &Busytone);
761                                         vpb_timer_restart(p->busy_timer);
762                                         p->state = VPB_STATE_PLAYBUSY;
763                                 }
764                         }
765                         break;
766
767                 default:
768                         /* Ignore.*/
769                         break;
770         }
771
772         if (option_verbose > 3) 
773                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: mode=%d, [%d=>%d]\n",
774                         p->dev, p->mode, e->type, e->data);
775
776         return 0;
777 }
778
779 static void *do_monitor(void *unused)
780 {
781
782         /* Monitor thread, doesn't die until explicitly killed. */
783
784         if (option_verbose > 1) 
785                 ast_verbose(VERBOSE_PREFIX_2 "Starting vpb monitor thread[%ld]\n",
786         pthread_self());
787
788         pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
789
790         for(;;) {
791                 VPB_EVENT e;
792                 VPB_EVENT je;
793                 char str[VPB_MAX_STR];
794                 struct vpb_pvt *p;
795
796                 /*
797                 if (option_verbose > 3)
798                      ast_verbose(VERBOSE_PREFIX_4 "Monitor waiting for event\n");
799                 */
800
801                 int res = vpb_get_event_sync(&e, VPB_WAIT_TIMEOUT);
802                 if( (res==VPB_NO_EVENTS) || (res==VPB_TIME_OUT) ){
803                         /*
804                         if (option_verbose > 3){
805                                 if (res ==  VPB_NO_EVENTS){
806                                         ast_verbose(VERBOSE_PREFIX_4 "No events....\n");
807                                 } else {
808                                         ast_verbose(VERBOSE_PREFIX_4 "No events, timed out....\n");
809                                 }
810                         }
811                         */
812                         continue;
813                 }
814
815                 if (res != VPB_OK) {
816                         ast_log(LOG_ERROR,"Monitor get event error %s\n", vpb_strerror(res) );
817                         ast_verbose("Monitor get event error %s\n", vpb_strerror(res) );
818                         continue;
819                 }
820
821                 str[0] = 0;
822
823                 p = NULL;
824
825                 ast_mutex_lock(&monlock); {
826                         vpb_translate_event(&e, str);
827
828                         if (e.type == VPB_NULL_EVENT) {
829                                 if (option_verbose > 3)
830                                         ast_verbose(VERBOSE_PREFIX_4 "Monitor got null event\n");
831                                 goto done; /* Nothing to do, just a wakeup call.*/
832                         }
833                         if (strlen(str)>1){
834                                 str[(strlen(str)-1)]='\0';
835                         }
836
837                         ast_mutex_lock(&iflock); {
838                                 p = iflist;
839                                 while (p && p->handle != e.handle)
840                                         p = p->next;
841                         } ast_mutex_unlock(&iflock);
842
843                         if (p && (option_verbose > 3))
844                                 ast_verbose(VERBOSE_PREFIX_4 "%s: Event [%d=>%s] \n", 
845                                         p ? p->dev : "null", e.type, str );
846                         done: (void)0;
847
848                 } ast_mutex_unlock(&monlock); 
849
850                 if (!p) {
851                         if (e.type != VPB_NULL_EVENT){
852                                 ast_log(LOG_WARNING, "Got event [%s][%d], no matching iface!\n", str,e.type);    
853                                 if (option_verbose > 3){
854                                         ast_verbose(VERBOSE_PREFIX_4 "vpb/ERR: No interface for Event [%d=>%s] \n",e.type,str );
855                                 }
856                         }
857                         continue;
858                 } 
859
860                 /* flush the event from the channel event Q */
861                 vpb_get_event_ch_async(e.handle,&je);
862                 if (option_verbose > 3){
863                         vpb_translate_event(&je, str);
864                         ast_verbose( VERBOSE_PREFIX_4 "%s: Flushing event [%d]=>%s\n",p->dev,je.type,str);
865                 }
866
867                 /* Check for ownership and locks */
868                 if ((p->owner)&&(!p->golock)){
869                         /* Need to get owner lock */
870                         /* Safely grab both p->lock and p->owner->lock so that there
871                         cannot be a race with something from the other side */
872                         /*
873                         ast_mutex_lock(&p->lock);
874                         while(ast_mutex_trylock(&p->owner->lock)) {
875                                 ast_mutex_unlock(&p->lock);
876                                 usleep(1);
877                                 ast_mutex_lock(&p->lock);
878                                 if (!p->owner)
879                                         break;
880                         }
881                         if (p->owner)
882                                 p->golock=1;
883                         */
884                 }
885                 /* Two scenarios: Are you owned or not. */
886                 if (p->owner) {
887                         monitor_handle_owned(p, &e);
888                 } else {
889                         monitor_handle_notowned(p, &e);
890                 }
891                 if ((!p->owner)&&(p->golock)){
892                         ast_mutex_unlock(&p->owner->lock);
893                         ast_mutex_unlock(&p->lock);
894                 }
895
896         }
897
898         return NULL;
899 }
900
901 static int restart_monitor(void)
902 {
903         int error = 0;
904
905         /* If we're supposed to be stopped -- stay stopped */
906         if (mthreadactive == -2)
907                 return 0;
908
909         if (option_verbose > 3)
910                 ast_verbose(VERBOSE_PREFIX_4 "Restarting monitor\n");
911
912         ast_mutex_lock(&monlock); {
913                 if (monitor_thread == pthread_self()) {
914                         ast_log(LOG_WARNING, "Cannot kill myself\n");
915                         error = -1;
916                         if (option_verbose > 3)
917                                 ast_verbose(VERBOSE_PREFIX_4 "Monitor trying to kill monitor\n");
918                         goto done;
919                 }
920                 if (mthreadactive != -1) {
921                         /* Why do other drivers kill the thread? No need says I, simply awake thread with event. */
922                         VPB_EVENT e;
923                         e.handle = 0;
924                         e.type = VPB_NULL_EVENT;
925                         e.data = 0;
926
927                         if (option_verbose > 3)
928                                 ast_verbose(VERBOSE_PREFIX_4 "Trying to reawake monitor\n");
929
930                         vpb_put_event(&e);
931                 } else {
932                         /* Start a new monitor */
933                         int pid = pthread_create(&monitor_thread, NULL, do_monitor, NULL); 
934                         if (option_verbose > 3)
935                                 ast_verbose(VERBOSE_PREFIX_4 "Created new monitor thread %d\n",pid);
936                         if (pid < 0) {
937                                 ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
938                                 error = -1;
939                                 goto done;
940                         } else
941                                 mthreadactive = 0; /* Started the thread!*/
942                 }
943                 done: (void)0;
944         } ast_mutex_unlock(&monlock);
945
946         if (option_verbose > 3)
947                 ast_verbose(VERBOSE_PREFIX_4 "Monitor restarted\n");
948
949         return error;
950 }
951
952 // Per board config that must be called after vpb_open()
953 static void mkbrd(vpb_model_t model, int echo_cancel)
954 {
955         if(!bridges) {
956                 if(model==vpb_model_v4pci) 
957                         max_bridges = MAX_BRIDGES_V4PCI;
958                 bridges = (vpb_bridge_t *)malloc(max_bridges * sizeof(vpb_bridge_t) );
959                 if(!bridges) 
960                         ast_log(LOG_ERROR, "Failed to initialize bridges\n");
961                 else 
962                         memset(bridges,0,max_bridges * sizeof(vpb_bridge_t));
963         }
964         if(!echo_cancel) {
965                 if (model==vpb_model_v4pci) {
966                         vpb_echo_canc_disable();
967                         ast_log(LOG_NOTICE, "Voicetronix echo cancellation OFF\n");
968                 } 
969                 else {
970                 /* need to it port by port for OpenSwitch*/
971                 }
972         } else {
973                 if (model==vpb_model_v4pci) {
974                         vpb_echo_canc_enable();
975                         ast_log(LOG_NOTICE, "Voicetronix echo cancellation ON\n");
976                 }
977                 else {
978                 /* need to it port by port for OpenSwitch*/
979                 }
980         }
981 }
982
983 struct vpb_pvt *mkif(int board, int channel, int mode, float txgain, float rxgain,
984                          float txswgain, float rxswgain, int bal1, int bal2, int bal3,
985                          char * callerid, int echo_cancel, int group )
986 {
987         struct vpb_pvt *tmp;
988         char buf[64];
989
990         tmp = (struct vpb_pvt *)calloc(1, sizeof *tmp);
991
992         if (!tmp)
993                 return NULL;
994
995         tmp->handle = vpb_open(board, channel);
996
997         if (tmp->handle < 0) {    
998                 ast_log(LOG_WARNING, "Unable to create channel vpb/%d-%d: %s\n", 
999                                         board, channel, strerror(errno));
1000                 free(tmp);
1001                 return NULL;
1002         }
1003                
1004         sprintf(tmp->dev, "vpb/%d-%d", board, channel);
1005
1006         tmp->mode = mode;
1007
1008         tmp->group = group;
1009
1010         strcpy(tmp->language, language);
1011         strcpy(tmp->context, context);
1012
1013         if(callerid) { 
1014                 strcpy(tmp->callerid, callerid);
1015                 free(callerid);
1016         } else {
1017                 strcpy(tmp->callerid, "unknown");
1018         }
1019
1020         /* check if codec balances have been set in the config file */
1021         if (bal3>=0) {
1022                 if ((bal1>=0) && !(bal1 & 32)) bal1 |= 32;
1023                         vpb_set_codec_reg(tmp->handle, 0x42, bal3);
1024         }
1025         if(bal1>=0) vpb_set_codec_reg(tmp->handle, 0x32, bal1);
1026         if(bal2>=0) vpb_set_codec_reg(tmp->handle, 0x3a, bal2);
1027
1028         tmp->txgain = txgain;
1029         vpb_play_set_hw_gain(tmp->handle, (txgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : txgain);
1030
1031         tmp->rxgain = rxgain;
1032         vpb_record_set_hw_gain(tmp->handle, (rxgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : rxgain);
1033
1034         tmp->txswgain = txswgain;
1035         vpb_play_set_gain(tmp->handle, (txswgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : txswgain);
1036
1037         tmp->rxswgain = rxswgain;
1038         vpb_record_set_gain(tmp->handle, (rxswgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : rxswgain);
1039
1040         tmp->vpb_model = vpb_model_unknown;
1041         if( vpb_get_model(buf) == VPB_OK ) {
1042                 if(strcmp(buf,"V12PCI")==0) 
1043                         tmp->vpb_model = vpb_model_v12pci;
1044                 else if(strcmp(buf,"VPB4")==0) 
1045                         tmp->vpb_model = vpb_model_v4pci;
1046         }
1047
1048         ast_mutex_init(&tmp->lock);
1049         ast_mutex_init(&tmp->record_lock);
1050         ast_mutex_init(&tmp->play_lock);
1051         ast_mutex_init(&tmp->play_dtmf_lock);
1052         
1053         tmp->golock=0;
1054
1055         tmp->busy_timer_id = vpb_timer_get_unique_timer_id();
1056         vpb_timer_open(&tmp->busy_timer, tmp->handle, tmp->busy_timer_id, TIMER_PERIOD_BUSY);
1057
1058         tmp->ringback_timer_id = vpb_timer_get_unique_timer_id();
1059         vpb_timer_open(&tmp->ringback_timer, tmp->handle, tmp->ringback_timer_id, TIMER_PERIOD_RINGBACK);
1060               
1061         if (mode == MODE_FXO){
1062                 vpb_set_event_mask(tmp->handle, VPB_EVENTS_NODTMF );
1063         }
1064         else {
1065                 vpb_set_event_mask(tmp->handle, VPB_EVENTS_STAT );
1066         }
1067
1068         if ((tmp->vpb_model == vpb_model_v12pci) && (echo_cancel)){
1069                 vpb_hostecho_on(tmp->handle);
1070         }
1071
1072         /* define grunt tone */
1073         vpb_settonedet(tmp->handle,&toned_ungrunt);
1074
1075         ast_log(LOG_NOTICE,"Voicetronix %s channel %s initialized (rxgain=%f txgain=%f) (%f/%f/0x%X/0x%X/0x%X)\n",
1076                 (tmp->vpb_model==vpb_model_v4pci)?"V4PCI":
1077                 (tmp->vpb_model==vpb_model_v12pci)?"V12PCI":"[Unknown model]",
1078                 tmp->dev, tmp->rxswgain, tmp->txswgain, tmp->rxgain, tmp->txgain, bal1, bal2, bal3 );
1079
1080         return tmp;
1081 }
1082
1083 static int vpb_indicate(struct ast_channel *ast, int condition)
1084 {
1085         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1086         int res = 0;
1087
1088         if (option_verbose > 3)
1089                 ast_verbose(VERBOSE_PREFIX_4 "%s: vpb indicate [%d]\n", p->dev, condition);
1090         if (ast->_state != AST_STATE_UP) {
1091                 return res;
1092         }
1093
1094         ast_mutex_lock(&p->lock);
1095         switch(condition) {
1096                 case AST_CONTROL_BUSY:
1097                 case AST_CONTROL_CONGESTION:
1098                         playtone(p->handle, &Busytone);
1099                         p->state = VPB_STATE_PLAYBUSY;
1100                         vpb_timer_restart(p->busy_timer); 
1101                         break;
1102                 case AST_CONTROL_RINGING:
1103                         playtone(p->handle, &Ringbacktone);
1104                         vpb_timer_restart(p->ringback_timer);
1105                         break;      
1106                 case AST_CONTROL_ANSWER:
1107                 case -1: /* -1 means stop playing? */
1108                         vpb_timer_stop(p->ringback_timer);
1109                         vpb_timer_stop(p->busy_timer);
1110                         stoptone(p->handle);
1111                         break;
1112                 case AST_CONTROL_HANGUP:
1113                         playtone(p->handle, &Busytone);
1114                         p->state = VPB_STATE_PLAYBUSY;
1115                         vpb_timer_restart(p->busy_timer);
1116                         break;
1117
1118                 default:
1119                         res = 0;
1120                         break;
1121         }
1122         ast_mutex_unlock(&p->lock);
1123         return res;
1124 }
1125
1126 static int vpb_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
1127 {
1128         struct vpb_pvt *p = (struct vpb_pvt *)newchan->pvt->pvt;
1129
1130         ast_mutex_lock(&p->lock);
1131         ast_log(LOG_DEBUG, "New owner for channel %s is %s\n", p->dev, newchan->name);
1132
1133         if (p->owner == oldchan) {
1134                 p->owner = newchan;
1135         }
1136
1137         if (newchan->_state == AST_STATE_RINGING) 
1138                 vpb_indicate(newchan, AST_CONTROL_RINGING);
1139
1140         ast_mutex_unlock(&p->lock);
1141         return 0;
1142 }
1143
1144 static int vpb_digit(struct ast_channel *ast, char digit)
1145 {
1146         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1147         char s[2];
1148
1149         ast_mutex_lock(&p->lock);
1150
1151
1152         s[0] = digit;
1153         s[1] = '\0';
1154
1155         if (option_verbose > 3)
1156                 ast_verbose(VERBOSE_PREFIX_4 "%s: play digit[%s]\n", p->dev, s);
1157
1158         ast_mutex_lock(&p->play_dtmf_lock);
1159         strncat(p->play_dtmf,s,sizeof(*p->play_dtmf));
1160         ast_mutex_unlock(&p->play_dtmf_lock);
1161
1162         ast_mutex_unlock(&p->lock);
1163         return 0;
1164 }
1165
1166 static int vpb_call(struct ast_channel *ast, char *dest, int timeout)
1167 {
1168         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1169         int res = 0,i;
1170         char *s = strrchr(dest, '/');
1171         char dialstring[254];
1172
1173         ast_mutex_lock(&p->lock);
1174
1175         if (s)
1176                 s = s + 1;
1177         else
1178                 s = dest;
1179         strcpy(dialstring,s);
1180         for (i=0; dialstring[i] != '\0' ; i++) {
1181                 if ((dialstring[i] == 'w') || (dialstring[i] == 'W'))
1182                         dialstring[i] = ',';
1183                 else if ((dialstring[i] == 'f') || (dialstring[i] == 'F'))
1184                         dialstring[i] = '&';
1185         }       
1186         if (option_verbose > 3)
1187                 ast_verbose(VERBOSE_PREFIX_4 "%s: starting call\n", p->dev);
1188
1189         if (ast->_state != AST_STATE_DOWN && ast->_state != AST_STATE_RESERVED) {
1190                 ast_log(LOG_WARNING, "vpb_call on %s neither down nor reserved!\n", ast->name);
1191                 ast_mutex_unlock(&p->lock);
1192                 return -1;
1193         }
1194         if (p->mode != MODE_FXO)  /* Station port, ring it. */
1195                 res = vpb_ring_station_async(p->handle, VPB_RING_STATION_ON,0);       
1196         else {
1197                 VPB_CALL call;
1198
1199                 // Dial must timeout or it can leave channels unuseable
1200                 if( timeout == 0 )
1201                         timeout = TIMER_PERIOD_NOANSWER;
1202                 else 
1203                         timeout = timeout * 1000; //convert from secs to ms.
1204
1205                 // These timeouts are only used with call progress dialing
1206                 call.dialtones = 1; // Number of dialtones to get outside line
1207                 call.dialtone_timeout = VPB_DIALTONE_WAIT; // Wait this long for dialtone (ms)
1208                 call.ringback_timeout = VPB_RINGWAIT; // Wait this long for ringing after dialing (ms)
1209                 call.inter_ringback_timeout = VPB_CONNECTED_WAIT; // If ringing stops for this long consider it connected (ms)
1210                 call.answer_timeout = timeout; // Time to wait for answer after ringing starts (ms)
1211                 memcpy( &call.tone_map,  DialToneMap, sizeof(DialToneMap) );
1212                 vpb_set_call(p->handle, &call);
1213
1214                 if (option_verbose > 1)
1215                         ast_verbose(VERBOSE_PREFIX_2 "%s: Calling %s on %s \n",p->dev, dialstring, ast->name); 
1216
1217                 if (option_verbose > 2) {
1218                         int j;
1219                         ast_verbose(VERBOSE_PREFIX_2 "%s: Dial parms for %s %d/%dms/%dms/%dms/%dms\n", p->dev
1220                                 , ast->name, call.dialtones, call.dialtone_timeout
1221                                 , call.ringback_timeout, call.inter_ringback_timeout
1222                                 , call.answer_timeout );
1223                         for( j=0; !call.tone_map[j].terminate; j++ )
1224                                 ast_verbose(VERBOSE_PREFIX_2 "%s: Dial parms for %s tone %d->%d\n", p->dev,
1225                                         ast->name, call.tone_map[j].tone_id, call.tone_map[j].call_id); 
1226                 }
1227
1228                 vpb_sethook_sync(p->handle,VPB_OFFHOOK);
1229                 p->state=VPB_STATE_OFFHOOK;
1230
1231                 #ifndef DIAL_WITH_CALL_PROGRESS
1232                 vpb_sleep(300);
1233                 res = vpb_dial_async(p->handle, dialstring);
1234                 #else
1235                 res = vpb_call_async(p->handle, dialstring);
1236                 #endif
1237
1238                 if (res != VPB_OK) {
1239                         ast_log(LOG_DEBUG, "Call on %s to %s failed: %s\n", ast->name, s, vpb_strerror(res));         
1240                         res = -1;
1241                 } else 
1242                         res = 0;
1243         }
1244
1245         if (option_verbose > 2)
1246                 ast_verbose(VERBOSE_PREFIX_3 "%s: VPB Calling %s [t=%d] on %s returned %d\n",p->dev , s, timeout, ast->name, res); 
1247         if (res == 0) {
1248                 ast_setstate(ast, AST_STATE_RINGING);
1249                 ast_queue_control(ast,AST_CONTROL_RINGING);             
1250         }
1251
1252         if (!p->readthread){
1253                 pthread_create(&p->readthread, NULL, do_chanreads, (void *)p);
1254         }
1255
1256         ast_mutex_unlock(&p->lock);
1257         return res;
1258 }
1259
1260 static int vpb_hangup(struct ast_channel *ast)
1261 {
1262         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1263         VPB_EVENT je;
1264         char str[VPB_MAX_STR];
1265
1266         ast_mutex_lock(&p->lock);
1267         if (option_verbose > 1) 
1268                 ast_verbose(VERBOSE_PREFIX_2 "%s: Hangup requested\n", ast->name);
1269
1270         if (!ast->pvt || !ast->pvt->pvt) {
1271                 ast_log(LOG_WARNING, "%s: channel not connected?\n", ast->name);
1272                 ast_mutex_unlock(&p->lock);
1273                 return 0;
1274         }
1275
1276         if(option_verbose>3) 
1277                 ast_verbose( VERBOSE_PREFIX_4 "%s: Setting state down\n",ast->name);
1278         ast_setstate(ast,AST_STATE_DOWN);
1279
1280
1281         /* Stop record */
1282         p->stopreads = 1;
1283         if( p->readthread ){
1284                 pthread_join(p->readthread, NULL); 
1285                 if(option_verbose>3) 
1286                         ast_verbose( VERBOSE_PREFIX_4 "%s: stopped record thread on %s\n",ast->name,p->dev);
1287         }
1288
1289         /* Stop play */
1290         if (p->lastoutput != -1) {
1291                 if(option_verbose>1) 
1292                         ast_verbose( VERBOSE_PREFIX_2 "%s: Ending play mode on %s\n",ast->name,p->dev);
1293                 vpb_play_terminate(p->handle);
1294                 ast_mutex_lock(&p->play_lock); {
1295                         vpb_play_buf_finish(p->handle);
1296                 } ast_mutex_unlock(&p->play_lock);
1297         }
1298
1299         if (p->mode != MODE_FXO) { 
1300                 /* station port. */
1301                 vpb_ring_station_async(p->handle, VPB_RING_STATION_OFF,0);      
1302                 if(p->state!=VPB_STATE_ONHOOK){
1303                         /* This is causing a "dial end" "play tone" loop
1304                         playtone(p->handle, &Busytone); 
1305                         p->state = VPB_STATE_PLAYBUSY;
1306                         if(option_verbose>4) 
1307                                 ast_verbose( VERBOSE_PREFIX_4 "%s: Station offhook[%d], playing busy tone\n",
1308                                                                 ast->name,p->state);
1309                         */
1310                 }
1311                 else {
1312                         stoptone(p->handle);
1313                 }
1314         } else {
1315                 stoptone(p->handle); // Terminates any dialing
1316                 vpb_sethook_sync(p->handle, VPB_ONHOOK);
1317                 p->state=VPB_STATE_ONHOOK;
1318         }
1319         while (VPB_OK==vpb_get_event_ch_async(p->handle,&je)){
1320                 if(option_verbose>3) {
1321                         vpb_translate_event(&je, str);
1322                         ast_verbose( VERBOSE_PREFIX_4 "%s: Flushing event [%d]=>%s\n",ast->name,je.type,str);
1323                 }
1324         }
1325
1326         p->readthread = 0;
1327         p->lastoutput = -1;
1328         p->lastinput = -1;
1329         p->last_ignore_dtmf = 1;
1330         p->ext[0]  = 0;
1331         p->dialtone = 0;
1332
1333         p->owner = NULL;
1334         ast->pvt->pvt=NULL;
1335
1336         ast_mutex_lock(&usecnt_lock); {
1337                 usecnt--;
1338         } ast_mutex_unlock(&usecnt_lock);
1339         ast_update_use_count();
1340
1341         if (option_verbose > 1)
1342                 ast_verbose(VERBOSE_PREFIX_2 "%s: Hangup complete\n", ast->name);
1343
1344         restart_monitor();
1345         ast_mutex_unlock(&p->lock);
1346         return 0;
1347 }
1348
1349 static int vpb_answer(struct ast_channel *ast)
1350 {
1351         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1352         VPB_EVENT je;
1353         int ret;
1354         ast_mutex_lock(&p->lock);
1355
1356         if (option_verbose > 3)
1357                         ast_verbose(VERBOSE_PREFIX_4 "%s: Answering channel\n",p->dev);
1358
1359         if (ast->_state != AST_STATE_UP) {
1360                 if (p->mode == MODE_FXO){
1361                         vpb_sethook_sync(p->handle, VPB_OFFHOOK);
1362                         p->state=VPB_STATE_OFFHOOK;
1363                         vpb_sleep(500);
1364                         ret = vpb_get_event_ch_async(p->handle,&je);
1365                         if ((ret == VPB_OK)&&(je.type != VPB_DROP)){
1366                                 if (option_verbose > 3){
1367                                                 ast_verbose(VERBOSE_PREFIX_4 "%s: Answer collected a wrong event!!\n",p->dev);
1368                                 }
1369                                 vpb_put_event(&je);
1370                         }
1371                 }
1372                 ast_setstate(ast, AST_STATE_UP);
1373
1374                 if(option_verbose>1) 
1375                         ast_verbose( VERBOSE_PREFIX_2 "%s: Answered call from %s on %s [%s]\n", p->dev,
1376                                         p->owner->callerid, ast->name,(p->mode == MODE_FXO)?"FXO":"FXS");
1377
1378                 ast->rings = 0;
1379                 if( !p->readthread ){
1380                         pthread_create(&p->readthread, NULL, do_chanreads, (void *)p);
1381                 } else {
1382                         if(option_verbose>3) 
1383                                 ast_verbose(VERBOSE_PREFIX_4 "%s: Record thread already running!!\n",p->dev);
1384                 }
1385         } else {
1386                 if(option_verbose>3) {
1387                         ast_verbose(VERBOSE_PREFIX_4 "%s: Answered state is up\n",p->dev);
1388                 }
1389         }
1390         ast_mutex_unlock(&p->lock);
1391         return 0;
1392 }
1393
1394 static struct ast_frame  *vpb_read(struct ast_channel *ast)
1395 {
1396         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt; 
1397         static struct ast_frame f = {AST_FRAME_NULL}; 
1398
1399         f.src = type;
1400         ast_log(LOG_NOTICE, "vpb_read should never be called (chan=%s)!\n", p->dev);
1401
1402         return &f;
1403 }
1404
1405 static inline int ast2vpbformat(int ast_format)
1406 {
1407         switch(ast_format) {
1408                 case AST_FORMAT_ALAW:
1409                         return VPB_ALAW;
1410                 case AST_FORMAT_SLINEAR:
1411                         return VPB_LINEAR;
1412                 case AST_FORMAT_ULAW:
1413                         return VPB_MULAW;
1414                 case AST_FORMAT_ADPCM:
1415                         return VPB_OKIADPCM;
1416                 default:
1417                         return -1;
1418         }
1419 }
1420
1421 static inline int astformatbits(int ast_format)
1422 {
1423         switch(ast_format) {
1424                 case AST_FORMAT_ALAW:
1425                 case AST_FORMAT_ULAW:
1426                         return 8;
1427                 case AST_FORMAT_SLINEAR:
1428                         return 16;
1429                 case AST_FORMAT_ADPCM:
1430                         return 4;
1431                 default:
1432                         return 8;
1433         }   
1434 }
1435
1436 int gain_vector(float g, short *v, int n) 
1437 {
1438         int i;
1439         float tmp;
1440         for ( i = 0; i<n; i++) {
1441                 tmp = g*v[i];
1442                 if (tmp > 32767.0)
1443                         tmp = 32767.0;
1444                 if (tmp < -32768.0)
1445                         tmp = -32768.0;
1446                 v[i] = (short)tmp;      
1447         }  
1448         return(i);
1449 }
1450
1451 static int vpb_write(struct ast_channel *ast, struct ast_frame *frame)
1452 {
1453         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt; 
1454         int res = 0, fmt = 0;
1455         ast_mutex_lock(&p->lock);
1456         if(option_verbose>4) 
1457                 ast_verbose( VERBOSE_PREFIX_4 "%s: Writing to channel\n", p->dev);
1458
1459         if (frame->frametype != AST_FRAME_VOICE) {
1460                 if(option_verbose>3) 
1461                         ast_verbose( VERBOSE_PREFIX_4 "%s: Don't know how to handle from type %d\n", ast->name, frame->frametype);
1462                 ast_mutex_unlock(&p->lock);
1463                 return 0;
1464         } else if (ast->_state != AST_STATE_UP) {
1465                 if(option_verbose>3) 
1466                         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);
1467                 p->lastoutput = -1;
1468                 ast_mutex_unlock(&p->lock);
1469                 return 0;
1470         }
1471
1472         fmt = ast2vpbformat(frame->subclass);
1473         if (fmt < 0) {
1474                 ast_log(LOG_WARNING, "%s: vpb_write Cannot handle frames of %d format!\n",ast->name, frame->subclass);
1475                 return -1;
1476         }
1477
1478         ast_mutex_lock(&p->play_lock);
1479
1480         if (p->lastoutput == -1) {
1481                 vpb_play_buf_start(p->handle, fmt);
1482                 if(option_verbose>1) 
1483                         ast_verbose( VERBOSE_PREFIX_2 "%s: Starting play mode (codec=%d)\n",p->dev,fmt);
1484         } else if (p->lastoutput != fmt) {
1485                 vpb_play_buf_finish(p->handle);
1486                 vpb_play_buf_start(p->handle, fmt);
1487                 if(option_verbose>1) 
1488                         ast_verbose( VERBOSE_PREFIX_2 "%s: Changed play format (%d=>%d)\n",p->dev,p->lastoutput,fmt);
1489         }
1490
1491         p->lastoutput = fmt;
1492
1493         // Apply extra gain !
1494         if( p->txswgain > MAX_VPB_GAIN )
1495                 gain_vector(p->txswgain - MAX_VPB_GAIN , (short*)frame->data, frame->datalen/sizeof(short));
1496
1497         res = vpb_play_buf_sync(p->handle, (char*)frame->data, frame->datalen);
1498         if( (res == VPB_OK) && (option_verbose > 4) ) {
1499                 short * data = (short*)frame->data;
1500                 ast_verbose("%s: Write chan (codec=%d) %d %d\n", p->dev, fmt, data[0],data[1]);
1501         }
1502
1503         ast_mutex_unlock(&p->play_lock);
1504         ast_mutex_unlock(&p->lock);
1505         return 0;
1506 }
1507
1508 /* Read monitor thread function. */
1509 static void *do_chanreads(void *pvt)
1510 {
1511         struct vpb_pvt *p = (struct vpb_pvt *)pvt;
1512         struct ast_frame *fr = &p->fr;
1513         char *readbuf = ((char *)p->buf) + AST_FRIENDLY_OFFSET;
1514         int bridgerec = 0;
1515         int afmt, readlen, res, fmt;
1516         int ignore_dtmf;
1517         char * getdtmf_var = NULL;
1518
1519         fr->frametype = AST_FRAME_VOICE;
1520         fr->src = type;
1521         fr->mallocd = 0;
1522         fr->samples = VPB_SAMPLES;
1523         fr->offset = AST_FRIENDLY_OFFSET;
1524         memset(p->buf, 0, sizeof p->buf);
1525
1526         if (option_verbose > 4) {
1527                 ast_verbose("%s: chanreads: starting thread\n", p->dev);
1528         }  
1529         ast_mutex_lock(&p->record_lock);
1530
1531         p->stopreads = 0; 
1532         while (!p->stopreads && p->owner) {
1533
1534                 ast_mutex_lock(&p->lock); {
1535                         if (option_verbose > 4) {
1536                                 ast_verbose("%s: chanreads: Checking bridge \n", p->dev);
1537                         }  
1538                         if (p->bridge) {
1539                                 if (p->bridge->c0 == p->owner && (p->bridge->flags & AST_BRIDGE_REC_CHANNEL_0))
1540                                         bridgerec = 1;
1541                                 else if (p->bridge->c1 == p->owner && (p->bridge->flags & AST_BRIDGE_REC_CHANNEL_1))
1542                                         bridgerec = 1;
1543                                 else 
1544                                         bridgerec = 0;
1545                         } else {
1546                                 bridgerec = 1;
1547                         }
1548                 } ast_mutex_unlock(&p->lock);
1549
1550                 if ( (p->owner->_state != AST_STATE_UP) || !bridgerec) {
1551                         if (option_verbose > 4) {
1552                                 ast_verbose("%s: chanreads: owner not up[%d] or no bridgerec[%d]\n", p->dev,p->owner->_state,bridgerec);
1553                         }  
1554                         vpb_sleep(10);
1555                         continue;
1556                 }
1557
1558                 // Voicetronix DTMF detection can be triggered off ordinary speech
1559                 // This leads to annoying beeps during the conversation
1560                 // Avoid this problem by just setting VPB_GETDTMF when you want to listen for DTMF
1561                 //ignore_dtmf = 1;
1562                 ignore_dtmf = 0; /* set this to 1 to turn this feature on */
1563                 getdtmf_var = pbx_builtin_getvar_helper(p->owner,"VPB_GETDTMF");
1564                 if( getdtmf_var && ( strcasecmp( getdtmf_var, "yes" ) == 0 ) )
1565                         ignore_dtmf = 0;
1566
1567                 if( ignore_dtmf != p->last_ignore_dtmf ) {
1568                         if(option_verbose>1) 
1569                                 ast_verbose( VERBOSE_PREFIX_2 "%s:Now %s DTMF \n",
1570                                         p->dev, ignore_dtmf ? "ignoring" : "listening for");
1571                         vpb_set_event_mask(p->handle, ignore_dtmf ? VPB_EVENTS_NODTMF : VPB_EVENTS_ALL );
1572                 }
1573                 p->last_ignore_dtmf = ignore_dtmf;
1574
1575                 // Play DTMF digits here to avoid problem you get if playing a digit during
1576                 // a record operation
1577                 if (option_verbose > 4) {
1578                         ast_verbose("%s: chanreads: Checking dtmf's \n", p->dev);
1579                 }  
1580                 ast_mutex_lock(&p->play_dtmf_lock);
1581                 if( p->play_dtmf[0] ) {
1582                         // Try to ignore DTMF event we get after playing digit
1583                         // This DTMF is played by asterisk and leads to an annoying trailing beep on CISCO phones
1584                         if( !ignore_dtmf) 
1585                                 vpb_set_event_mask(p->handle, VPB_EVENTS_NODTMF );
1586                         vpb_dial_sync(p->handle,p->play_dtmf);
1587                         if(option_verbose>1) 
1588                                 ast_verbose( VERBOSE_PREFIX_2 "%s: Played DTMF %s\n",p->dev,p->play_dtmf);
1589                         p->play_dtmf[0] = '\0';
1590                         ast_mutex_unlock(&p->play_dtmf_lock);
1591                         vpb_sleep(700); // Long enough to miss echo and DTMF event
1592                         if( !ignore_dtmf) 
1593                                 vpb_set_event_mask(p->handle, VPB_EVENTS_ALL );
1594                         continue;
1595                 }
1596                 ast_mutex_unlock(&p->play_dtmf_lock);
1597
1598                 afmt = (p->owner) ? p->owner->pvt->rawreadformat : AST_FORMAT_SLINEAR;
1599                 fmt = ast2vpbformat(afmt);
1600                 if (fmt < 0) {
1601                         ast_log(LOG_WARNING,"%s: Record failure (unsupported format %d)\n", p->dev, afmt);
1602                         return NULL;
1603                 }
1604                 readlen = VPB_SAMPLES * astformatbits(afmt) / 8;
1605
1606                 if (p->lastinput == -1) {
1607                         vpb_record_buf_start(p->handle, fmt);
1608                         vpb_reset_record_fifo_alarm(p->handle);
1609                         if(option_verbose>1) 
1610                                 ast_verbose( VERBOSE_PREFIX_2 "%s: Starting record mode (codec=%d)\n",p->dev,fmt);
1611                 } else if (p->lastinput != fmt) {
1612                         vpb_record_buf_finish(p->handle);
1613                         vpb_record_buf_start(p->handle, fmt);
1614                         if(option_verbose>1) 
1615                                 ast_verbose( VERBOSE_PREFIX_2 "%s: Changed record format (%d=>%d)\n",p->dev,p->lastinput,fmt);
1616                 }
1617                 p->lastinput = fmt;
1618
1619                 /* Read only if up and not bridged, or a bridge for which we can read. */
1620                 if (option_verbose > 4) {
1621                         ast_verbose("%s: chanreads: getting buffer!\n", p->dev);
1622                 }  
1623                 if( (res = vpb_record_buf_sync(p->handle, readbuf, readlen) ) == VPB_OK ) {
1624                         if (option_verbose > 4) {
1625                                 ast_verbose("%s: chanreads: got buffer!\n", p->dev);
1626                         }  
1627                         // Apply extra gain !
1628                         if( p->rxswgain > MAX_VPB_GAIN )
1629                                 gain_vector(p->rxswgain - MAX_VPB_GAIN , (short*)readbuf, readlen/sizeof(short));
1630                         if (option_verbose > 4) {
1631                                 ast_verbose("%s: chanreads: applied gain\n", p->dev);
1632                         }  
1633
1634                         fr->subclass = afmt;
1635                         fr->data = readbuf;
1636                         fr->datalen = readlen;
1637
1638                         // Using trylock here to prevent deadlock when channel is hungup
1639                         // (ast_hangup() immediately gets lock)
1640                         if (p->owner && !p->stopreads ) {
1641                                 if (option_verbose > 4) {
1642                                         ast_verbose("%s: chanreads: queueing buffer on frame (state[%d])\n", p->dev,p->owner->_state);
1643                                 }  
1644                                 
1645                                 if (ast_mutex_trylock(&p->owner->lock)==0)  {
1646                                         ast_queue_frame(p->owner, fr);
1647                                         ast_mutex_unlock(&p->owner->lock);
1648                                 } else {
1649                                         if (option_verbose > 3) 
1650                                                 ast_verbose("%s: Couldnt get lock on owner channel to send frame!\n", p->dev);
1651                                 }
1652                                 if (option_verbose > 4) {
1653                                         short * data = (short*)readbuf;
1654                                         ast_verbose("%s: Read channel (codec=%d) %d %d\n", p->dev, fmt, data[0], data[1] );
1655                                 }  
1656                         }
1657                         else {
1658                                 if (option_verbose > 4) {
1659                                         ast_verbose("%s: p->stopreads[%d] p->owner[%p]\n", p->dev, p->stopreads,(void *)p->owner);
1660                                 }  
1661                         }
1662                 } else {
1663                         ast_log(LOG_WARNING,"%s: Record failure (%s)\n", p->dev, vpb_strerror(res));
1664                         vpb_record_buf_finish(p->handle);
1665                         vpb_record_buf_start(p->handle, fmt);
1666                 }
1667         }
1668
1669         /* When stopreads seen, go away! */
1670         vpb_record_buf_finish(p->handle);
1671         ast_mutex_unlock(&p->record_lock);
1672
1673         if (option_verbose > 1)
1674                 ast_verbose(VERBOSE_PREFIX_2 "%s: Ending record mode (%d/%s)\n",
1675                          p->dev, p->stopreads, p->owner? "yes" : "no");     
1676         return NULL;
1677 }
1678
1679 static struct ast_channel *vpb_new(struct vpb_pvt *i, int state, char *context)
1680 {
1681         struct ast_channel *tmp; 
1682
1683         if (i->owner) {
1684             ast_log(LOG_WARNING, "Called vpb_new on owned channel (%s) ?!\n", i->dev);
1685             return NULL;
1686         }
1687             
1688         tmp = ast_channel_alloc(1);
1689         if (tmp) {
1690                 strncpy(tmp->name, i->dev, sizeof(tmp->name));
1691                 tmp->type = type;
1692                
1693                 // Linear is the preferred format. Although Voicetronix supports other formats
1694                 // they are all converted to/from linear in the vpb code. Best for us to use
1695                 // linear since we can then adjust volume in this modules.
1696                 tmp->nativeformats = prefformat;
1697                 tmp->pvt->rawreadformat = AST_FORMAT_SLINEAR;
1698                 tmp->pvt->rawwriteformat =  AST_FORMAT_SLINEAR;
1699                 ast_setstate(tmp, state);
1700                 if (state == AST_STATE_RING)
1701                         tmp->rings = 1;
1702                 tmp->pvt->pvt = i;
1703                 /* set call backs */
1704                 tmp->pvt->send_digit = vpb_digit;
1705                 tmp->pvt->call = vpb_call;
1706                 tmp->pvt->hangup = vpb_hangup;
1707                 tmp->pvt->answer = vpb_answer;
1708                 tmp->pvt->read = vpb_read;
1709                 tmp->pvt->write = vpb_write;
1710                 tmp->pvt->bridge = vpb_bridge;
1711                 tmp->pvt->indicate = vpb_indicate;
1712                 tmp->pvt->fixup = vpb_fixup;
1713                 
1714                 strncpy(tmp->context, context, sizeof(tmp->context)-1);
1715                 if (strlen(i->ext))
1716                         strncpy(tmp->exten, i->ext, sizeof(tmp->exten)-1);
1717                 else
1718                         strncpy(tmp->exten, "s",  sizeof(tmp->exten) - 1);
1719                 if (strlen(i->language))
1720                         strncpy(tmp->language, i->language, sizeof(tmp->language)-1);
1721
1722                 i->owner = tmp;
1723      
1724                 i->bridge = NULL;
1725                 i->lastoutput = -1;
1726                 i->lastinput = -1;
1727                 i->last_ignore_dtmf = 1;
1728                 i->readthread = 0;
1729                 i->play_dtmf[0] = '\0';
1730                 
1731                 i->lastgrunt  = get_time_in_ms(); /* Assume at least one grunt tone seen now. */
1732
1733                 ast_mutex_lock(&usecnt_lock);
1734                 usecnt++;
1735                 ast_mutex_unlock(&usecnt_lock);
1736                 ast_update_use_count();
1737                 if (state != AST_STATE_DOWN) {
1738                         if (ast_pbx_start(tmp)) {
1739                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
1740                                 ast_hangup(tmp);
1741                         }
1742                 }
1743         } else {
1744                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
1745         }
1746         return tmp;
1747 }
1748
1749 static struct ast_channel *vpb_request(char *type, int format, void *data) 
1750 {
1751         int oldformat;
1752         struct vpb_pvt *p;
1753         struct ast_channel *tmp = NULL;
1754         char *name = strdup(data ? (char *)data : "");
1755         char *s, *sepstr;
1756         int group=-1;
1757
1758         oldformat = format;
1759         format &= prefformat;
1760         if (!format) {
1761                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", oldformat);
1762                 return NULL;
1763         }
1764
1765         sepstr = name;
1766         s = strsep(&sepstr, "/"); /* Handle / issues */
1767         if (!s) 
1768                 s = "";
1769         /* Check if we are looking for a group */
1770         if (toupper(name[0]) == 'G' || toupper(name[0])=='R') {
1771                 group=atoi(name+1);     
1772         }
1773         /* Search for an unowned channel */
1774         ast_mutex_lock(&iflock); {
1775                 p = iflist;
1776                 while(p) {
1777                         if (group == -1){
1778                                 if (strncmp(s, p->dev + 4, sizeof p->dev) == 0) {
1779                                         if (!p->owner) {
1780                                                 tmp = vpb_new(p, AST_STATE_DOWN, p->context);
1781                                                 break;
1782                                         }
1783                                 }
1784                         }
1785                         else {
1786                                 if ((p->group == group) && (!p->owner)) {
1787                                         tmp = vpb_new(p, AST_STATE_DOWN, p->context);
1788                                         break;
1789                                 }
1790                         }
1791                         p = p->next;
1792                 }
1793         } ast_mutex_unlock(&iflock);
1794
1795
1796         if (option_verbose > 1) 
1797                 ast_verbose(VERBOSE_PREFIX_2 " %s requested, got: [%s]\n",
1798                 name, tmp ? tmp->name : "None");
1799
1800         free(name);
1801
1802         restart_monitor();
1803         return tmp;
1804 }
1805
1806 static float parse_gain_value(char *gain_type, char *value)
1807 {
1808         float gain;
1809
1810         /* try to scan number */
1811         if (sscanf(value, "%f", &gain) != 1)
1812         {
1813                 ast_log(LOG_ERROR, "Invalid %s value '%s' in '%s' config\n", value, gain_type, config);
1814                 return DEFAULT_GAIN;
1815         }
1816
1817
1818         /* percentage? */
1819         //if (value[strlen(value) - 1] == '%')
1820         //      return gain / (float)100;
1821
1822         return gain;
1823 }
1824
1825 int load_module()
1826 {
1827         struct ast_config *cfg;
1828         struct ast_variable *v;
1829         struct vpb_pvt *tmp;
1830         int board = 0, group = 0;
1831         int mode = MODE_IMMEDIATE;
1832         float txgain = DEFAULT_GAIN, rxgain = DEFAULT_GAIN; 
1833         float txswgain = 0, rxswgain = 0; 
1834         int first_channel = 1;
1835         int echo_cancel = DEFAULT_ECHO_CANCEL;
1836         int error = 0; /* Error flag */
1837         int bal1 = -1; // Special value - means do not set
1838         int bal2 = -1; 
1839         int bal3 = -1;
1840         char * callerid = NULL;
1841
1842         cfg = ast_load(config);
1843
1844         /* We *must* have a config file otherwise stop immediately */
1845         if (!cfg) {
1846                 ast_log(LOG_ERROR, "Unable to load config %s\n", config);
1847                 return -1;
1848         }  
1849
1850         vpb_seterrormode(VPB_ERROR_CODE);
1851
1852         ast_mutex_lock(&iflock); {
1853                 v = ast_variable_browse(cfg, "interfaces");
1854                 while(v) {
1855                         /* Create the interface list */
1856                         if (strcasecmp(v->name, "board") == 0) {
1857                                 board = atoi(v->value);
1858                         } else  if (strcasecmp(v->name, "group") == 0){
1859                                 group = atoi(v->value);
1860                         } else  if (strcasecmp(v->name, "useloopdrop") == 0){
1861                                 UseLoopDrop = atoi(v->value);
1862                         } else if (strcasecmp(v->name, "channel") == 0) {
1863                                 int channel = atoi(v->value);
1864                                 tmp = mkif(board, channel, mode, txgain, rxgain, txswgain, rxswgain, bal1, bal2, bal3, callerid, echo_cancel,group);
1865                                 if (tmp) {
1866                                         if(first_channel) {
1867                                                 mkbrd( tmp->vpb_model, echo_cancel );
1868                                                 first_channel = 0;
1869                                         }
1870                                         tmp->next = iflist;
1871                                         iflist = tmp;
1872                                 } else {
1873                                         ast_log(LOG_ERROR, 
1874                                         "Unable to register channel '%s'\n", v->value);
1875                                         error = -1;
1876                                         goto done;
1877                                 }
1878                                 callerid = NULL;
1879                         } else if (strcasecmp(v->name, "language") == 0) {
1880                                 strncpy(language, v->value, sizeof(language)-1);
1881                         } else if (strcasecmp(v->name, "callerid") == 0) {
1882                                 callerid = strdup(v->value);
1883                         } else if (strcasecmp(v->name, "mode") == 0) {
1884                                 if (strncasecmp(v->value, "di", 2) == 0) 
1885                                         mode = MODE_DIALTONE;
1886                                 else if (strncasecmp(v->value, "im", 2) == 0)
1887                                         mode = MODE_IMMEDIATE;
1888                                 else if (strncasecmp(v->value, "fx", 2) == 0)
1889                                         mode = MODE_FXO;
1890                                 else
1891                                         ast_log(LOG_WARNING, "Unknown mode: %s\n", v->value);
1892                         } else if (!strcasecmp(v->name, "context")) {
1893                                 strncpy(context, v->value, sizeof(context)-1);
1894                         } else if (!strcasecmp(v->name, "echocancel")) {
1895                                 if (!strcasecmp(v->value, "off")) 
1896                                         echo_cancel = 0;
1897                         } else if (strcasecmp(v->name, "txgain") == 0) {
1898                                 txswgain = parse_gain_value(v->name, v->value);
1899                         } else if (strcasecmp(v->name, "rxgain") == 0) {
1900                                 rxswgain = parse_gain_value(v->name, v->value);
1901                         } else if (strcasecmp(v->name, "txhwgain") == 0) {
1902                                 txgain = parse_gain_value(v->name, v->value);
1903                         } else if (strcasecmp(v->name, "rxhwgain") == 0) {
1904                                 rxgain = parse_gain_value(v->name, v->value);
1905                         } else if (strcasecmp(v->name, "bal1") == 0) {
1906                                 bal1 = strtol(v->value, NULL, 16);
1907                                 if(bal1<0 || bal1>255) {
1908                                         ast_log(LOG_WARNING, "Bad bal1 value: %d\n", bal1);
1909                                         bal1 = -1;
1910                                 }
1911                         } else if (strcasecmp(v->name, "bal2") == 0) {
1912                                 bal2 = strtol(v->value, NULL, 16);
1913                                 if(bal2<0 || bal2>255) {
1914                                         ast_log(LOG_WARNING, "Bad bal2 value: %d\n", bal2);
1915                                         bal2 = -1;
1916                                 }
1917                         } else if (strcasecmp(v->name, "bal3") == 0) {
1918                                 bal3 = strtol(v->value, NULL, 16);
1919                                 if(bal3<0 || bal3>255) {
1920                                         ast_log(LOG_WARNING, "Bad bal3 value: %d\n", bal3);
1921                                         bal3 = -1;
1922                                 }
1923                         } else if (strcasecmp(v->name, "grunttimeout") == 0) {
1924                                 gruntdetect_timeout = 1000*atoi(v->value);
1925                         }
1926                         v = v->next;
1927                 }
1928
1929                 if (gruntdetect_timeout < 1000)
1930                         gruntdetect_timeout = 1000;
1931
1932                 done: (void)0;
1933         } ast_mutex_unlock(&iflock);
1934
1935         ast_destroy(cfg);
1936
1937         if (!error && ast_channel_register(type, tdesc, prefformat, vpb_request) != 0) {
1938                 ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
1939                 error = -1;
1940         }
1941
1942
1943         if (error)
1944                 unload_module();
1945         else 
1946                 restart_monitor(); /* And start the monitor for the first time */
1947
1948         return error;
1949 }
1950
1951
1952 int unload_module()
1953 {
1954         struct vpb_pvt *p;
1955         /* First, take us out of the channel loop */
1956         ast_channel_unregister(type);
1957
1958         ast_mutex_lock(&iflock); {
1959                 /* Hangup all interfaces if they have an owner */
1960                 p = iflist;
1961                 while(p) {
1962                         if (p->owner)
1963                                 ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
1964                         p = p->next;
1965                 }
1966                 iflist = NULL;
1967         } ast_mutex_unlock(&iflock);
1968
1969         ast_mutex_lock(&monlock); {
1970                 if (mthreadactive > -1) {
1971                         pthread_cancel(monitor_thread);
1972                         pthread_join(monitor_thread, NULL);
1973                 }
1974                 mthreadactive = -2;
1975         } ast_mutex_unlock(&monlock);
1976
1977         ast_mutex_lock(&iflock); {
1978                 /* Destroy all the interfaces and free their memory */
1979
1980                 while(iflist) {
1981                         p = iflist;                 
1982                         ast_mutex_destroy(&p->lock);
1983                         pthread_cancel(p->readthread);
1984                         ast_mutex_destroy(&p->record_lock);
1985                         ast_mutex_destroy(&p->play_lock);
1986                         ast_mutex_destroy(&p->play_dtmf_lock);
1987                         p->readthread = 0;
1988
1989                         vpb_close(p->handle);
1990
1991                         iflist = iflist->next;
1992
1993                         free(p);
1994                 }
1995                 iflist = NULL;
1996         } ast_mutex_unlock(&iflock);
1997
1998         ast_mutex_lock(&bridge_lock); {
1999                 memset(bridges, 0, sizeof bridges);          
2000         } ast_mutex_unlock(&bridge_lock);
2001         ast_mutex_destroy(&bridge_lock);
2002         free(bridges);
2003
2004         return 0;
2005 }
2006
2007 int usecount()
2008 {
2009         int res;
2010         ast_mutex_lock(&usecnt_lock);
2011         res = usecnt;
2012         ast_mutex_unlock(&usecnt_lock);
2013         return res;
2014 }
2015
2016 char *description()
2017 {
2018         return desc;
2019 }
2020
2021 char *key()
2022 {
2023         return ASTERISK_GPL_KEY;
2024 }
2025
2026 #if defined(__cplusplus) || defined(c_plusplus)
2027  }
2028 #endif