Merge major BSD mutex and symbol conflict patches (bug #1816) (link patch still pending)
[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  * Paul Bagyenda <bagyenda@dsmagic.com>
8  * Copyright (C) 2004, Ben Kramer
9  * Ben Kramer <ben@voicetronix.com.au>
10  *
11  * This program is free software, distributed under the terms of
12  * the GNU General Public License
13  */
14
15
16 #include <stdio.h>
17 #include <pthread.h>
18 #include <string.h>
19 #include <asterisk/lock.h>
20 #include <asterisk/channel.h>
21 #include <asterisk/channel_pvt.h>
22 #include <asterisk/config.h>
23 #include <asterisk/logger.h>
24 #include <asterisk/module.h>
25 #include <asterisk/pbx.h>
26 #include <asterisk/options.h>
27 #include <sys/socket.h>
28 #include <sys/time.h>
29 #include <errno.h>
30 #include <unistd.h>
31 #include <stdlib.h>
32 #include <arpa/inet.h>
33 #include <fcntl.h>
34 #include <sys/ioctl.h>
35 #include <ctype.h>
36
37 #include <vpbapi.h>
38 #include <assert.h>
39
40 #define DEFAULT_GAIN 0
41 #define DEFAULT_ECHO_CANCEL 1
42   
43 #define VPB_SAMPLES 240 
44 #define VPB_MAX_BUF VPB_SAMPLES*4 + AST_FRIENDLY_OFFSET
45
46 #define VPB_NULL_EVENT 200
47
48 #define VPB_WAIT_TIMEOUT 4000
49
50 #define MAX_VPB_GAIN 12.0
51
52 #if defined(__cplusplus) || defined(c_plusplus)
53  extern "C" {
54 #endif
55
56 static char *desc = "VoiceTronix V6PCI/V12PCI/V4PCI  API Support";
57 static char *type = "vpb";
58 static char *tdesc = "Standard VoiceTronix API Driver";
59 static char *config = "vpb.conf";
60
61 /* Default context for dialtone mode */
62 static char context[AST_MAX_EXTENSION] = "default";
63
64 /* Default language */
65 static char language[MAX_LANGUAGE] = "";
66 static int usecnt =0;
67
68 static int gruntdetect_timeout = 3600000; /* Grunt detect timeout is 1hr. */
69
70 static const int prefformat = AST_FORMAT_SLINEAR;
71
72 AST_MUTEX_DEFINE_STATIC(usecnt_lock);
73
74 /* Protect the interface list (of vpb_pvt's) */
75 AST_MUTEX_DEFINE_STATIC(iflock);
76
77 /* Protect the monitoring thread, so only one process can kill or start it, and not
78    when it's doing something critical. */
79 AST_MUTEX_DEFINE_STATIC(monlock);
80
81 /* This is the thread for the monitor which checks for input on the channels
82    which are not currently in use.  */
83 static pthread_t monitor_thread;
84
85 static int mthreadactive = -1; /* Flag for monitoring monitorthread.*/
86
87
88 static int restart_monitor(void);
89
90 /* The private structures of the VPB channels are 
91    linked for selecting outgoing channels */
92    
93 #define MODE_DIALTONE   1
94 #define MODE_IMMEDIATE  2
95 #define MODE_FXO        3
96
97 /* Pick a country or add your own! */
98 #define TONES_AU
99 #ifdef TONES_AU
100 static VPB_TONE Dialtone     = {440,    440,    440,    -10,    -10,    -10,    5000,   0   };
101 static VPB_TONE Busytone     = {470,    0,      0,      -10,    -100,   -100,   5000,   0 };
102 static VPB_TONE Ringbacktone = {400,    50,     440,    -10,    -10,    -10,    1400,   800 };
103 #endif
104 /*
105 #define TONES_USA
106 #ifdef TONES_USA
107 static VPB_TONE Dialtone     = {425,   0,   0, -16,  -100, -100, 10000,    0};
108 static VPB_TONE Busytone     = {425,   0,   0, -10,  -100, -100,   500,  500};
109 static VPB_TONE Ringbacktone = {400,   425,   450, -20,  -20, -20,  1000, 1000};
110 #endif
111 */
112
113 /* grunt tone defn's */
114 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 } } };
115 static VPB_DETECT toned_ungrunt = { 2, VPB_GRUNT, 1, 2000, 1, 0, 0, -40, 0, 0, 30, 40, { { 0, 0, 0, 0 } } };
116
117 /* Use loop drop detection */
118 static int UseLoopDrop=1;
119
120 #define TIMER_PERIOD_RINGBACK 2000
121 #define TIMER_PERIOD_BUSY 700
122           
123 #define VPB_EVENTS_ALL (VPB_MRING|VPB_MDIGIT|VPB_MDTMF|VPB_MTONEDETECT|VPB_MTIMEREXP|VPB_MPLAY_UNDERFLOW \
124                         |VPB_MRECORD_OVERFLOW|VPB_MSTATION_OFFHOOK|VPB_MSTATION_ONHOOK \
125                         |VPB_MRING_OFF|VPB_MDROP|VPB_MSTATION_FLASH)
126 #define VPB_EVENTS_NODTMF (VPB_MRING|VPB_MDIGIT|VPB_MTONEDETECT|VPB_MTIMEREXP|VPB_MPLAY_UNDERFLOW \
127                         |VPB_MRECORD_OVERFLOW|VPB_MSTATION_OFFHOOK|VPB_MSTATION_ONHOOK \
128                         |VPB_MRING_OFF|VPB_MDROP|VPB_MSTATION_FLASH)
129 #define VPB_EVENTS_STAT (VPB_MRING|VPB_MDIGIT|VPB_MDTMF|VPB_MTONEDETECT|VPB_MTIMEREXP|VPB_MPLAY_UNDERFLOW \
130                         |VPB_MRECORD_OVERFLOW|VPB_MSTATION_OFFHOOK|VPB_MSTATION_ONHOOK \
131                         |VPB_MRING_OFF|VPB_MSTATION_FLASH)
132
133
134 // Dialing parameters for Australia
135 //#define DIAL_WITH_CALL_PROGRESS
136 VPB_TONE_MAP DialToneMap[] = {  { VPB_BUSY_AUST, VPB_CALL_DISCONNECT, 0 },
137                                 { VPB_DIAL, VPB_CALL_DIALTONE, 0 },
138                                 { VPB_RINGBACK_308, VPB_CALL_RINGBACK, 0 },
139                                 { VPB_BUSY_AUST, VPB_CALL_BUSY, 0 },
140                                 { VPB_GRUNT, VPB_CALL_GRUNT, 0 },
141                                 { 0, 0, 1 } };
142 #define VPB_DIALTONE_WAIT 2000 /* Wait up to 2s for a dialtone */
143 #define VPB_RINGWAIT 4000 /* Wait up to 4s for ring tone after dialing */
144 #define VPB_CONNECTED_WAIT 4000 /* If no ring tone detected for 4s then consider call connected */
145 #define TIMER_PERIOD_NOANSWER 120000 /* Let it ring for 120s before deciding theres noone there */
146
147 #define MAX_BRIDGES_V4PCI 2
148 #define MAX_BRIDGES_V12PCI 128
149
150 /* port states */
151 #define VPB_STATE_ONHOOK        0
152 #define VPB_STATE_OFFHOOK       1
153 #define VPB_STATE_DIALLING      2
154 #define VPB_STATE_JOINED        3
155 #define VPB_STATE_GETDTMF       4
156 #define VPB_STATE_PLAYDIAL      5
157 #define VPB_STATE_PLAYBUSY      6
158 #define VPB_STATE_PLAYRING      7
159
160
161 typedef struct  {
162         int inuse;
163         struct ast_channel *c0, *c1, **rc;
164         struct ast_frame **fo;
165         int flags;
166         ast_mutex_t lock;
167         pthread_cond_t cond;
168         int endbridge;
169 } vpb_bridge_t;
170
171 static vpb_bridge_t * bridges;
172 static int max_bridges = MAX_BRIDGES_V4PCI;
173
174 AST_MUTEX_DEFINE_STATIC(bridge_lock);
175
176 typedef enum {
177         vpb_model_unknown = 0, 
178         vpb_model_v4pci,
179         vpb_model_v12pci
180 } vpb_model_t;
181
182 static struct vpb_pvt {
183
184         ast_mutex_t owner_lock;                 /* Protect blocks that expect ownership to remain the same */
185         struct ast_channel *owner;              /* Channel who owns us, possibly NULL */
186
187         int golock;                             /* Got owner lock ? */
188
189         int mode;                               /* fxo/imediate/dialtone*/
190         int handle;                             /* Handle for vpb interface */
191
192         int state;                              /* used to keep port state (internal to driver) */
193
194         int group;                              /* Which group this port belongs to */
195
196         char dev[256];                          /* Device name, eg vpb/1-1 */
197         vpb_model_t vpb_model;                  /* card model */
198
199         struct ast_frame f, fr;                 /* Asterisk frame interface */
200         char buf[VPB_MAX_BUF];                  /* Static buffer for reading frames */
201
202         int dialtone;                           /* NOT USED */
203         float txgain, rxgain;                   /* Hardware gain control */
204         float txswgain, rxswgain;               /* Software gain control */
205
206         int wantdtmf;                           /* Waiting for DTMF. */
207         char context[AST_MAX_EXTENSION];        /* The context for this channel */
208
209         char ext[AST_MAX_EXTENSION];            /* DTMF buffer for the ext[ens] */
210         char language[MAX_LANGUAGE];            /* language being used */
211         char callerid[AST_MAX_EXTENSION];       /* CallerId used for directly connected phone */
212
213         int lastoutput;                         /* Holds the last Audio format output'ed */
214         int lastinput;                          /* Holds the last Audio format input'ed */
215         int last_ignore_dtmf;
216
217         void *busy_timer;                       /* Void pointer for busy vpb_timer */
218         int busy_timer_id;                      /* unique timer ID for busy timer */
219
220         void *ringback_timer;                   /* Void pointer for ringback vpb_timer */
221         int ringback_timer_id;                  /* unique timer ID for ringback timer */
222
223         double lastgrunt;                       /* time stamp (secs since epoc) of last grunt event */
224
225         ast_mutex_t lock;                       /* This one just protects bridge ptr below */
226         vpb_bridge_t *bridge;
227
228         int stopreads;                          /* Stop reading...*/
229
230         pthread_t readthread;                   /* For monitoring read channel. One per owned channel. */
231
232         ast_mutex_t record_lock;                /* This one prevents reentering a record_buf block */
233         ast_mutex_t play_lock;                  /* This one prevents reentering a play_buf block */
234
235         ast_mutex_t play_dtmf_lock;
236         char play_dtmf[16];
237
238         struct vpb_pvt *next;                   /* Next channel in list */
239
240 } *iflist = NULL;
241
242 static struct ast_channel *vpb_new(struct vpb_pvt *i, int state, char *context);
243 static void *do_chanreads(void *pvt);
244
245 // Can't get vpb_bridge() working on v4pci without either a horrible
246 // high pitched feedback noise or bad hiss noise depending on gain settings
247 // Get asterisk to do the bridging
248 #define BAD_V4PCI_BRIDGE
249
250 // This one enables a half duplex bridge which may be required to prevent high pitched
251 // feedback when getting asterisk to do the bridging and when using certain gain settings.
252 //#define HALF_DUPLEX_BRIDGE
253
254 static int vpb_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc)
255 {
256         struct vpb_pvt *p0 = (struct vpb_pvt *)c0->pvt->pvt;
257         struct vpb_pvt *p1 = (struct vpb_pvt *)c1->pvt->pvt;
258         int i, res;
259
260         #ifdef BAD_V4PCI_BRIDGE
261         if(p0->vpb_model==vpb_model_v4pci)
262                 return -2;
263         #endif
264
265         ast_mutex_lock(&p0->lock);
266         ast_mutex_lock(&p1->lock);
267
268         /* Bridge channels, check if we can.  I believe we always can, so find a slot.*/
269
270         ast_mutex_lock(&bridge_lock); {
271                 for (i = 0; i < max_bridges; i++) 
272                         if (!bridges[i].inuse)
273                                 break;
274                 if (i < max_bridges) {
275                         bridges[i].inuse = 1;
276                         bridges[i].endbridge = 0;
277                         bridges[i].flags = flags;
278                         bridges[i].rc = rc;
279                         bridges[i].fo = fo;
280                         bridges[i].c0 = c0;
281                         bridges[i].c1 = c1;
282                 }              
283         } ast_mutex_unlock(&bridge_lock); 
284
285         if (i == max_bridges) {
286                 ast_log(LOG_WARNING, "Failed to bridge %s and %s!\n", c0->name, c1->name);
287                 ast_mutex_unlock(&p0->lock);
288                 ast_mutex_unlock(&p1->lock);
289                 return -2;
290         } else {
291                 /* Set bridge pointers. You don't want to take these locks while holding bridge lock.*/
292                 ast_mutex_lock(&p0->lock); {
293                         p0->bridge = &bridges[i];
294                 } ast_mutex_unlock(&p0->lock);
295
296                 ast_mutex_lock(&p1->lock); {
297                         p1->bridge = &bridges[i];
298                 } ast_mutex_unlock(&p1->lock);
299
300                 if (option_verbose>1) 
301                         ast_verbose(VERBOSE_PREFIX_2 "Bridging call entered with [%s, %s]\n", c0->name, c1->name);
302         }
303
304         #ifdef HALF_DUPLEX_BRIDGE
305
306         if (option_verbose>1) 
307                 ast_verbose(VERBOSE_PREFIX_2 "Starting half-duplex bridge [%s, %s]\n", c0->name, c1->name);
308
309         int dir = 0;
310
311         memset(p0->buf, 0, sizeof p0->buf);
312         memset(p1->buf, 0, sizeof p1->buf);
313
314         vpb_record_buf_start(p0->handle, VPB_ALAW);
315         vpb_record_buf_start(p1->handle, VPB_ALAW);
316
317         vpb_play_buf_start(p0->handle, VPB_ALAW);
318         vpb_play_buf_start(p1->handle, VPB_ALAW);
319
320         while( !bridges[i].endbridge ) {
321                 struct vpb_pvt *from, *to;
322                 if(++dir%2) {
323                         from = p0;
324                         to = p1;
325                 } else {
326                         from = p1;
327                         to = p0;
328                 }
329                 vpb_record_buf_sync(from->handle, from->buf, VPB_SAMPLES);
330                 vpb_play_buf_sync(to->handle, from->buf, VPB_SAMPLES);
331         }
332
333         vpb_record_buf_finish(p0->handle);
334         vpb_record_buf_finish(p1->handle);
335
336         vpb_play_buf_finish(p0->handle);
337         vpb_play_buf_finish(p1->handle);
338
339         if (option_verbose>1) 
340                 ast_verbose(VERBOSE_PREFIX_2 "Finished half-duplex bridge [%s, %s]\n", c0->name, c1->name);
341
342         res = VPB_OK;
343
344         #else
345
346         res = vpb_bridge(p0->handle, p1->handle, VPB_BRIDGE_ON, i+1 /* resource 1 & 2 only for V4PCI*/ );
347         if (res == VPB_OK) {
348                 //pthread_cond_wait(&bridges[i].cond, &bridges[i].lock); /* Wait for condition signal. */
349                 while( !bridges[i].endbridge ) {};
350                 vpb_bridge(p0->handle, p1->handle, VPB_BRIDGE_OFF, i+1 /* resource 1 & 2 only for V4PCI*/ ); 
351         }
352
353         #endif
354
355         ast_mutex_lock(&bridge_lock); {
356                 bridges[i].inuse = 0;
357         } ast_mutex_unlock(&bridge_lock); 
358
359         p0->bridge = NULL;
360         p1->bridge = NULL;
361
362
363         if (option_verbose>1) 
364                 ast_verbose(VERBOSE_PREFIX_2 "Bridging call done with [%s, %s] => %d\n", c0->name, c1->name, res);
365
366         ast_mutex_unlock(&p0->lock);
367         ast_mutex_unlock(&p1->lock);
368         return (res==VPB_OK)?0:-1;
369 }
370
371 static double get_time_in_ms()
372 {
373         struct timeval tv;
374         gettimeofday(&tv, NULL);
375         return ((double)tv.tv_sec*1000)+((double)tv.tv_usec/1000);
376 }
377
378 // Caller ID can be located in different positions between the rings depending on your Telco
379 // Australian (Telstra) callerid starts 700ms after 1st ring and finishes 1.5s after first ring
380 // Use ANALYSE_CID to record rings and determine location of callerid
381 //#define ANALYSE_CID
382 #define RING_SKIP 600
383 #define CID_MSECS 1700
384
385 static void get_callerid(struct vpb_pvt *p)
386 {
387         short buf[CID_MSECS*8]; // 8kHz sampling rate
388         double cid_record_time;
389         int rc;
390
391         if(strcasecmp(p->callerid, "on")) {
392                 p->owner->callerid = strdup("unknown");
393                 return;
394         }
395
396         if( ast_mutex_trylock(&p->record_lock) == 0 ) {
397
398                 char callerid[AST_MAX_EXTENSION] = ""; 
399
400                 cid_record_time = get_time_in_ms();
401                 if (option_verbose>3) 
402                         ast_verbose(VERBOSE_PREFIX_4 "CID record - start\n");
403
404                 #ifdef ANALYSE_CID
405                 VPB_RECORD record_parms = { "", 8 * 1000 }; // record a couple of rings
406                 vpb_record_set(p->handle,&record_parms);
407                 ast_verbose(VERBOSE_PREFIX_4 "Recording debug CID sample to /tmp/cid.raw\n");
408                 vpb_record_file_sync(p->handle,"/tmp/cid.raw",VPB_LINEAR);
409                 rc = 1; // don't try to decode_cid
410                 #else   
411                 // Skip any trailing ringtone
412                 vpb_sleep(RING_SKIP);
413
414                 if (option_verbose>3) 
415                         ast_verbose(VERBOSE_PREFIX_4 "CID record - skipped %fms trailing ring\n",
416                                  get_time_in_ms() - cid_record_time);
417                 cid_record_time = get_time_in_ms();
418
419                 // Record bit between the rings which contains the callerid
420                 vpb_record_buf_start(p->handle, VPB_LINEAR);
421                 rc = vpb_record_buf_sync(p->handle, (char*)buf, sizeof(buf));
422                 vpb_record_buf_finish(p->handle);
423                 #endif
424
425                 if (option_verbose>3) 
426                         ast_verbose(VERBOSE_PREFIX_4 "CID record - recorded %fms between rings\n", 
427                                 get_time_in_ms() - cid_record_time);
428
429                 ast_mutex_unlock(&p->record_lock);
430
431                 if( rc != VPB_OK ) {
432                         ast_log(LOG_ERROR, "Failed to record caller id sample on %s\n", p->dev );
433                         return;
434                 }
435
436                 // This decodes FSK 1200baud type callerid
437                 if ((rc=vpb_cid_decode(callerid, buf, CID_MSECS*8)) == VPB_OK ) {
438                         if(!*callerid) 
439                                 strcpy(callerid,"undisclosed"); // blocked CID (eg caller used 1831)
440                 } else {
441                         ast_log(LOG_ERROR, "Failed to decode caller id on %s - %s\n", p->dev, vpb_strerror(rc) );
442                         strcpy(callerid,"unknown");
443                 }
444                 p->owner->callerid = strdup(callerid);
445
446         } else 
447                 ast_log(LOG_ERROR, "Failed to set record mode for caller id on %s\n", p->dev );
448 }
449
450 // Terminate any tones we are presently playing
451 static void stoptone( int handle)
452 {
453         int ret;
454         VPB_EVENT je;
455         while(vpb_playtone_state(handle)!=VPB_OK){
456                 vpb_tone_terminate(handle);
457                 ret = vpb_get_event_ch_async(handle,&je);
458                 if ((ret == VPB_OK)&&(je.type != VPB_DIALEND)){
459                         if (option_verbose > 3){
460                                         ast_verbose(VERBOSE_PREFIX_4 "Stop tone collected a wrong event!!\n");
461                         }
462                         vpb_put_event(&je);
463                 }
464                 vpb_sleep(10);
465         }
466 }
467
468 /* Safe vpb_playtone_async */
469 static int playtone( int handle, VPB_TONE *tone)
470 {
471         int ret=VPB_OK;
472         stoptone(handle);
473         if (option_verbose > 3) 
474                 ast_verbose(VERBOSE_PREFIX_4 "[%02d]: Playing tone\n", handle);
475         ret = vpb_playtone_async(handle, tone);
476         return ret;
477 }
478
479 static inline int monitor_handle_owned(struct vpb_pvt *p, VPB_EVENT *e)
480 {
481         struct ast_frame f = {AST_FRAME_CONTROL}; /* default is control, Clear rest. */
482         int endbridge = 0;
483         int res=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                                 if (p->owner->_state == AST_STATE_UP) {
530                                         f.subclass = AST_CONTROL_HANGUP;
531                                 }
532                                 else {
533                                         f.subclass = AST_CONTROL_BUSY;
534                                 }
535                         } else if (e->data == VPB_GRUNT) {
536                                 if( ( get_time_in_ms() - p->lastgrunt ) > gruntdetect_timeout ) {
537                                         // Nothing heard on line for a very long time
538                                         // Timeout connection
539                                         if (option_verbose > 2) 
540                                                 ast_verbose(VERBOSE_PREFIX_3 "grunt timeout\n");
541                                         ast_log(LOG_NOTICE,"%s: Line hangup due of lack of conversation\n",p->dev); 
542                                         f.subclass = AST_CONTROL_HANGUP;
543                                 } else {
544                                         p->lastgrunt = get_time_in_ms();
545                                         f.frametype = -1;
546                                 }
547                         } else
548                                 f.frametype = -1;
549                         break;
550
551                 case VPB_CALLEND:
552                         #ifdef DIAL_WITH_CALL_PROGRESS
553                         if (e->data == VPB_CALL_CONNECTED) 
554                                 f.subclass = AST_CONTROL_ANSWER;
555                         else if (e->data == VPB_CALL_NO_DIAL_TONE || e->data == VPB_CALL_NO_RING_BACK)
556                                 f.subclass =  AST_CONTROL_CONGESTION;
557                         else if (e->data == VPB_CALL_NO_ANSWER || e->data == VPB_CALL_BUSY)
558                                 f.subclass = AST_CONTROL_BUSY;
559                         else if (e->data  == VPB_CALL_DISCONNECTED) 
560                                 f.subclass = AST_CONTROL_HANGUP;
561                         #else
562                         ast_log(LOG_NOTICE,"%s: Got call progress callback but blind dialing \n", p->dev); 
563                         f.frametype = -1;
564                         #endif
565                         break;
566
567                 case VPB_STATION_OFFHOOK:
568                         f.subclass = AST_CONTROL_ANSWER;
569                         break;
570
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                 case VPB_STATION_ONHOOK:
580                         f.subclass = AST_CONTROL_HANGUP;
581                         break;
582
583                 case VPB_STATION_FLASH:
584                         f.subclass = AST_CONTROL_FLASH;
585                         break;
586
587                 // Called when dialing has finished and ringing starts
588                 // No indication that call has really been answered when using blind dialing
589                 case VPB_DIALEND:
590                         if (p->state < 5){
591                                 f.subclass = AST_CONTROL_ANSWER;
592                                 if (option_verbose > 1) 
593                                         ast_verbose(VERBOSE_PREFIX_2 "%s: Dialend\n", p->dev);
594                         } else {
595                                 f.frametype = -1;
596                         }
597                         break;
598
599                 case VPB_PLAY_UNDERFLOW:
600                         f.frametype = -1;
601                         vpb_reset_play_fifo_alarm(p->handle);
602                         break;
603
604                 case VPB_RECORD_OVERFLOW:
605                         f.frametype = -1;
606                         vpb_reset_record_fifo_alarm(p->handle);
607                         break;
608
609                 default:
610                         f.frametype = -1;
611                         break;
612         }
613
614         if (option_verbose > 3) 
615                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_owned: putting frame type[%d]subclass[%d], bridge=%p\n",
616                         p->dev, f.frametype, f.subclass, (void *)p->bridge);
617
618         res = ast_mutex_lock(&p->lock); 
619         if (option_verbose > 3) ast_verbose("%s: LOCKING in handle_owned [%d]\n", p->dev,res);
620         {
621                 if (p->bridge) { /* Check what happened, see if we need to report it. */
622                         switch (f.frametype) {
623                                 case AST_FRAME_DTMF:
624                                         if (    !(p->bridge->c0 == p->owner && 
625                                                         (p->bridge->flags & AST_BRIDGE_DTMF_CHANNEL_0) ) &&
626                                                 !(p->bridge->c1 == p->owner && 
627                                                         (p->bridge->flags & AST_BRIDGE_DTMF_CHANNEL_1) )) 
628                                                 /* Kill bridge, this is interesting. */
629                                                 endbridge = 1;
630                                         break;
631
632                                 case AST_FRAME_CONTROL:
633                                         if (!(p->bridge->flags & AST_BRIDGE_IGNORE_SIGS)) 
634                                         #if 0
635                                         if (f.subclass == AST_CONTROL_BUSY ||
636                                         f.subclass == AST_CONTROL_CONGESTION ||
637                                         f.subclass == AST_CONTROL_HANGUP ||
638                                         f.subclass == AST_CONTROL_FLASH)
639                                         #endif
640                                                 endbridge = 1;
641                                         break;
642
643                                 default:
644                                         break;
645                         }
646                         if (endbridge) {
647                                 if (p->bridge->fo)
648                                         *p->bridge->fo = ast_frisolate(&f);
649                                 if (p->bridge->rc)
650                                         *p->bridge->rc = p->owner;
651
652                                 ast_mutex_lock(&p->bridge->lock); {
653                                         p->bridge->endbridge = 1;
654                                         pthread_cond_signal(&p->bridge->cond);
655                                 } ast_mutex_unlock(&p->bridge->lock);                      
656                         }         
657                 }
658         } 
659
660         if (endbridge){
661                 res = ast_mutex_unlock(&p->lock);
662                 if (option_verbose > 3) ast_verbose("%s: unLOCKING in handle_owned [%d]\n", p->dev,res);
663                 return 0;
664         }
665
666         // Trylock used here to avoid deadlock that can occur if we
667         // happen to be in here handling an event when hangup is called
668         // Problem is that hangup holds p->owner->lock
669         if ((f.frametype >= 0)&& (f.frametype != AST_FRAME_NULL)&&(p->owner)) {
670                 if (ast_mutex_trylock(&p->owner->lock)==0)  {
671                         ast_queue_frame(p->owner, &f);
672                         ast_mutex_unlock(&p->owner->lock);
673                 } else {
674                         ast_verbose("%s: handled_owned: Missed event %d/%d \n",
675                                 p->dev,f.frametype, f.subclass);
676                 }
677         }
678         res = ast_mutex_unlock(&p->lock);
679         if (option_verbose > 3) ast_verbose("%s: unLOCKING in handle_owned [%d]\n", p->dev,res);
680
681         return 0;
682 }
683
684 static inline int monitor_handle_notowned(struct vpb_pvt *p, VPB_EVENT *e)
685 {
686         char s[2] = {0};
687
688         if (option_verbose > 3) {
689                 char str[VPB_MAX_STR];
690                 vpb_translate_event(e, str);
691                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: mode=%d, event[%d][%s]=[%d]\n",
692                         p->dev, p->mode, e->type,str, e->data);
693         }
694
695         switch(e->type) {
696                 case VPB_RING:
697                         if (p->mode == MODE_FXO) /* FXO port ring, start * */ {
698                                 vpb_new(p, AST_STATE_RING, p->context);
699                                 get_callerid(p);        /* Australian Caller ID only between 1st and 2nd ring */
700                         }
701                         break;
702
703                 case VPB_RING_OFF:
704                         break;
705
706                 case VPB_STATION_OFFHOOK:
707                         if (p->mode == MODE_IMMEDIATE) 
708                                 vpb_new(p,AST_STATE_RING, p->context);
709                         else {
710                                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: playing dialtone\n",p->dev);
711                                 playtone(p->handle, &Dialtone);
712                                 p->wantdtmf = 1;
713                                 p->ext[0] = 0;  /* Just to be sure & paranoid.*/
714                                 p->state=VPB_STATE_PLAYDIAL;
715                         }
716                         break;
717
718                 case VPB_DIALEND:
719                         if (p->mode == MODE_DIALTONE){
720                                 if (p->state == VPB_STATE_PLAYDIAL) {
721                                         playtone(p->handle, &Dialtone);
722                                         p->wantdtmf = 1;
723                                         p->ext[0] = 0;  // Just to be sure & paranoid.
724                                 }
725                                 /* These are not needed as they have timers to restart them
726                                 else if (p->state == VPB_STATE_PLAYBUSY) {
727                                         playtone(p->handle, &Busytone);
728                                         p->wantdtmf = 1;
729                                         p->ext[0] = 0;  // Just to be sure & paranoid.
730                                 }
731                                 else if (p->state == VPB_STATE_PLAYRING) {
732                                         playtone(p->handle, &Ringbacktone);
733                                         p->wantdtmf = 1;
734                                         p->ext[0] = 0;  // Just to be sure & paranoid.
735                                 }
736                                 */
737                         } else {
738                                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: Got a DIALEND when not really expected\n",p->dev);
739                         }
740                         break;
741
742                 case VPB_STATION_ONHOOK:        /* clear ext */
743                         stoptone(p->handle);
744                         p->wantdtmf = 1 ;
745                         p->ext[0] = 0;
746                         p->state=VPB_STATE_ONHOOK;
747                         break;
748
749                 case VPB_DTMF:
750                         if (p->state == VPB_STATE_ONHOOK){
751                                 /* DTMF's being passed while on-hook maybe Caller ID */
752                                 break;
753                         }
754                         if (p->wantdtmf == 1) {
755                                 stoptone(p->handle);
756                                 p->wantdtmf = 0;
757                         }
758                         p->state=VPB_STATE_GETDTMF;
759                         s[0] = e->data;
760                         strcat(p->ext, s);
761                         if (ast_exists_extension(NULL, p->context, p->ext, 1, p->callerid)){
762                                 vpb_new(p,AST_STATE_RING, p->context);
763                         } else if (!ast_canmatch_extension(NULL, p->context, p->ext, 1, p->callerid)){
764                                 if (ast_exists_extension(NULL, "default", p->ext, 1, p->callerid)) {
765                                         vpb_new(p,AST_STATE_RING, "default");         
766                                 } else if (!ast_canmatch_extension(NULL, "default", p->ext, 1, p->callerid)) {
767                                         if (option_verbose > 3) {
768                                                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: can't match anything in %s or default\n",
769                                                          p->dev, p->context);
770                                         }
771                                         playtone(p->handle, &Busytone);
772                                         vpb_timer_stop(p->busy_timer);
773                                         vpb_timer_start(p->busy_timer);
774                                         p->state = VPB_STATE_PLAYBUSY;
775                                 }
776                         }
777                         break;
778
779                 default:
780                         /* Ignore.*/
781                         break;
782         }
783
784         if (option_verbose > 3) 
785                 ast_verbose(VERBOSE_PREFIX_4 "%s: handle_notowned: mode=%d, [%d=>%d]\n",
786                         p->dev, p->mode, e->type, e->data);
787
788         return 0;
789 }
790
791 static void *do_monitor(void *unused)
792 {
793
794         /* Monitor thread, doesn't die until explicitly killed. */
795
796         if (option_verbose > 1) 
797                 ast_verbose(VERBOSE_PREFIX_2 "Starting vpb monitor thread[%ld]\n",
798         pthread_self());
799
800         pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
801
802         for(;;) {
803                 VPB_EVENT e;
804                 VPB_EVENT je;
805                 char str[VPB_MAX_STR];
806                 struct vpb_pvt *p;
807
808                 /*
809                 if (option_verbose > 3)
810                      ast_verbose(VERBOSE_PREFIX_4 "Monitor waiting for event\n");
811                 */
812
813                 int res = vpb_get_event_sync(&e, VPB_WAIT_TIMEOUT);
814                 if( (res==VPB_NO_EVENTS) || (res==VPB_TIME_OUT) ){
815                         /*
816                         if (option_verbose > 3){
817                                 if (res ==  VPB_NO_EVENTS){
818                                         ast_verbose(VERBOSE_PREFIX_4 "No events....\n");
819                                 } else {
820                                         ast_verbose(VERBOSE_PREFIX_4 "No events, timed out....\n");
821                                 }
822                         }
823                         */
824                         continue;
825                 }
826
827                 if (res != VPB_OK) {
828                         ast_log(LOG_ERROR,"Monitor get event error %s\n", vpb_strerror(res) );
829                         ast_verbose("Monitor get event error %s\n", vpb_strerror(res) );
830                         continue;
831                 }
832
833                 str[0] = 0;
834
835                 p = NULL;
836
837                 ast_mutex_lock(&monlock); {
838                         vpb_translate_event(&e, str);
839
840                         if (e.type == VPB_NULL_EVENT) {
841                                 if (option_verbose > 3)
842                                         ast_verbose(VERBOSE_PREFIX_4 "Monitor got null event\n");
843                                 goto done; /* Nothing to do, just a wakeup call.*/
844                         }
845                         if (strlen(str)>1){
846                                 str[(strlen(str)-1)]='\0';
847                         }
848
849                         ast_mutex_lock(&iflock); {
850                                 p = iflist;
851                                 while (p && p->handle != e.handle)
852                                         p = p->next;
853                         } ast_mutex_unlock(&iflock);
854
855                         if (p && (option_verbose > 3))
856                                 ast_verbose(VERBOSE_PREFIX_4 "%s: Event [%d=>%s] \n", 
857                                         p ? p->dev : "null", e.type, str );
858                         done: (void)0;
859
860                 } ast_mutex_unlock(&monlock); 
861
862                 if (!p) {
863                         if (e.type != VPB_NULL_EVENT){
864                                 ast_log(LOG_WARNING, "Got event [%s][%d], no matching iface!\n", str,e.type);    
865                                 if (option_verbose > 3){
866                                         ast_verbose(VERBOSE_PREFIX_4 "vpb/ERR: No interface for Event [%d=>%s] \n",e.type,str );
867                                 }
868                         }
869                         continue;
870                 } 
871
872                 /* flush the event from the channel event Q */
873                 vpb_get_event_ch_async(e.handle,&je);
874                 if (option_verbose > 3){
875                         vpb_translate_event(&je, str);
876                         ast_verbose( VERBOSE_PREFIX_4 "%s: Flushing event [%d]=>%s\n",p->dev,je.type,str);
877                 }
878
879                 /* Check for ownership and locks */
880                 if ((p->owner)&&(!p->golock)){
881                         /* Need to get owner lock */
882                         /* Safely grab both p->lock and p->owner->lock so that there
883                         cannot be a race with something from the other side */
884                         /*
885                         ast_mutex_lock(&p->lock);
886                         while(ast_mutex_trylock(&p->owner->lock)) {
887                                 ast_mutex_unlock(&p->lock);
888                                 usleep(1);
889                                 ast_mutex_lock(&p->lock);
890                                 if (!p->owner)
891                                         break;
892                         }
893                         if (p->owner)
894                                 p->golock=1;
895                         */
896                 }
897                 /* Two scenarios: Are you owned or not. */
898                 if (p->owner) {
899                         monitor_handle_owned(p, &e);
900                 } else {
901                         monitor_handle_notowned(p, &e);
902                 }
903                 /* if ((!p->owner)&&(p->golock)){
904                         ast_mutex_unlock(&p->owner->lock);
905                         ast_mutex_unlock(&p->lock);
906                 }
907                 */
908
909         }
910
911         return NULL;
912 }
913
914 static int restart_monitor(void)
915 {
916         int error = 0;
917
918         /* If we're supposed to be stopped -- stay stopped */
919         if (mthreadactive == -2)
920                 return 0;
921
922         if (option_verbose > 3)
923                 ast_verbose(VERBOSE_PREFIX_4 "Restarting monitor\n");
924
925         ast_mutex_lock(&monlock); {
926                 if (monitor_thread == pthread_self()) {
927                         ast_log(LOG_WARNING, "Cannot kill myself\n");
928                         error = -1;
929                         if (option_verbose > 3)
930                                 ast_verbose(VERBOSE_PREFIX_4 "Monitor trying to kill monitor\n");
931                         goto done;
932                 }
933                 if (mthreadactive != -1) {
934                         /* Why do other drivers kill the thread? No need says I, simply awake thread with event. */
935                         VPB_EVENT e;
936                         e.handle = 0;
937                         e.type = VPB_NULL_EVENT;
938                         e.data = 0;
939
940                         if (option_verbose > 3)
941                                 ast_verbose(VERBOSE_PREFIX_4 "Trying to reawake monitor\n");
942
943                         vpb_put_event(&e);
944                 } else {
945                         /* Start a new monitor */
946                         int pid = pthread_create(&monitor_thread, NULL, do_monitor, NULL); 
947                         if (option_verbose > 3)
948                                 ast_verbose(VERBOSE_PREFIX_4 "Created new monitor thread %d\n",pid);
949                         if (pid < 0) {
950                                 ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
951                                 error = -1;
952                                 goto done;
953                         } else
954                                 mthreadactive = 0; /* Started the thread!*/
955                 }
956                 done: (void)0;
957         } ast_mutex_unlock(&monlock);
958
959         if (option_verbose > 3)
960                 ast_verbose(VERBOSE_PREFIX_4 "Monitor restarted\n");
961
962         return error;
963 }
964
965 // Per board config that must be called after vpb_open()
966 static void mkbrd(vpb_model_t model, int echo_cancel)
967 {
968         if(!bridges) {
969                 if(model==vpb_model_v4pci) 
970                         max_bridges = MAX_BRIDGES_V4PCI;
971                 bridges = (vpb_bridge_t *)malloc(max_bridges * sizeof(vpb_bridge_t) );
972                 if(!bridges) 
973                         ast_log(LOG_ERROR, "Failed to initialize bridges\n");
974                 else {
975                         memset(bridges,0,max_bridges * sizeof(vpb_bridge_t));
976                         for(int i = 0; i < max_bridges; i++ ) {
977                                 ast_mutex_init(&bridges[i].lock);
978                                 pthread_cond_init(&bridges[i].cond, NULL);
979                         }
980                 }
981         }
982         if(!echo_cancel) {
983                 if (model==vpb_model_v4pci) {
984                         vpb_echo_canc_disable();
985                         ast_log(LOG_NOTICE, "Voicetronix echo cancellation OFF\n");
986                 } 
987                 else {
988                 /* need to it port by port for OpenSwitch*/
989                 }
990         } else {
991                 if (model==vpb_model_v4pci) {
992                         vpb_echo_canc_enable();
993                         ast_log(LOG_NOTICE, "Voicetronix echo cancellation ON\n");
994                 }
995                 else {
996                 /* need to it port by port for OpenSwitch*/
997                 }
998         }
999 }
1000
1001 struct vpb_pvt *mkif(int board, int channel, int mode, float txgain, float rxgain,
1002                          float txswgain, float rxswgain, int bal1, int bal2, int bal3,
1003                          char * callerid, int echo_cancel, int group )
1004 {
1005         struct vpb_pvt *tmp;
1006         char buf[64];
1007
1008         tmp = (struct vpb_pvt *)calloc(1, sizeof *tmp);
1009
1010         if (!tmp)
1011                 return NULL;
1012
1013         tmp->handle = vpb_open(board, channel);
1014
1015         if (tmp->handle < 0) {    
1016                 ast_log(LOG_WARNING, "Unable to create channel vpb/%d-%d: %s\n", 
1017                                         board, channel, strerror(errno));
1018                 free(tmp);
1019                 return NULL;
1020         }
1021                
1022         sprintf(tmp->dev, "vpb/%d-%d", board, channel);
1023
1024         tmp->mode = mode;
1025
1026         tmp->group = group;
1027
1028         strcpy(tmp->language, language);
1029         strcpy(tmp->context, context);
1030
1031         if(callerid) { 
1032                 strcpy(tmp->callerid, callerid);
1033                 free(callerid);
1034         } else {
1035                 strcpy(tmp->callerid, "unknown");
1036         }
1037
1038         /* check if codec balances have been set in the config file */
1039         if (bal3>=0) {
1040                 if ((bal1>=0) && !(bal1 & 32)) bal1 |= 32;
1041                         vpb_set_codec_reg(tmp->handle, 0x42, bal3);
1042         }
1043         if(bal1>=0) vpb_set_codec_reg(tmp->handle, 0x32, bal1);
1044         if(bal2>=0) vpb_set_codec_reg(tmp->handle, 0x3a, bal2);
1045
1046         tmp->txgain = txgain;
1047         vpb_play_set_hw_gain(tmp->handle, (txgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : txgain);
1048
1049         tmp->rxgain = rxgain;
1050         vpb_record_set_hw_gain(tmp->handle, (rxgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : rxgain);
1051
1052         tmp->txswgain = txswgain;
1053         vpb_play_set_gain(tmp->handle, (txswgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : txswgain);
1054
1055         tmp->rxswgain = rxswgain;
1056         vpb_record_set_gain(tmp->handle, (rxswgain > MAX_VPB_GAIN) ? MAX_VPB_GAIN : rxswgain);
1057
1058         tmp->vpb_model = vpb_model_unknown;
1059         if( vpb_get_model(buf) == VPB_OK ) {
1060                 if(strcmp(buf,"V12PCI")==0) 
1061                         tmp->vpb_model = vpb_model_v12pci;
1062                 else if(strcmp(buf,"VPB4")==0) 
1063                         tmp->vpb_model = vpb_model_v4pci;
1064         }
1065
1066         ast_mutex_init(&tmp->owner_lock);
1067         ast_mutex_init(&tmp->lock);
1068         ast_mutex_init(&tmp->record_lock);
1069         ast_mutex_init(&tmp->play_lock);
1070         ast_mutex_init(&tmp->play_dtmf_lock);
1071         
1072         tmp->golock=0;
1073
1074         tmp->busy_timer_id = vpb_timer_get_unique_timer_id();
1075         vpb_timer_open(&tmp->busy_timer, tmp->handle, tmp->busy_timer_id, TIMER_PERIOD_BUSY);
1076
1077         tmp->ringback_timer_id = vpb_timer_get_unique_timer_id();
1078         vpb_timer_open(&tmp->ringback_timer, tmp->handle, tmp->ringback_timer_id, TIMER_PERIOD_RINGBACK);
1079               
1080         if (mode == MODE_FXO){
1081                 vpb_set_event_mask(tmp->handle, VPB_EVENTS_NODTMF );
1082         }
1083         else {
1084                 vpb_set_event_mask(tmp->handle, VPB_EVENTS_STAT );
1085         }
1086
1087         if ((tmp->vpb_model == vpb_model_v12pci) && (echo_cancel)){
1088                 vpb_hostecho_on(tmp->handle);
1089         }
1090
1091         /* define grunt tone */
1092         vpb_settonedet(tmp->handle,&toned_ungrunt);
1093
1094         ast_log(LOG_NOTICE,"Voicetronix %s channel %s initialized (rxgain=%f txgain=%f) (%f/%f/0x%X/0x%X/0x%X)\n",
1095                 (tmp->vpb_model==vpb_model_v4pci)?"V4PCI":
1096                 (tmp->vpb_model==vpb_model_v12pci)?"V12PCI":"[Unknown model]",
1097                 tmp->dev, tmp->rxswgain, tmp->txswgain, tmp->rxgain, tmp->txgain, bal1, bal2, bal3 );
1098
1099         return tmp;
1100 }
1101
1102 static int vpb_indicate(struct ast_channel *ast, int condition)
1103 {
1104         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1105         int res = 0;
1106         int tmp = 0;
1107
1108         if (option_verbose > 3)
1109                 ast_verbose(VERBOSE_PREFIX_4 "%s: vpb indicate [%d] state[%d]\n", p->dev, condition,ast->_state);
1110         if (ast->_state != AST_STATE_UP) {
1111                 return res;
1112         }
1113
1114         if (option_verbose > 3) ast_verbose("%s: LOCKING in indicate \n", p->dev);
1115         ast_mutex_lock(&p->lock);
1116         switch(condition) {
1117                 case AST_CONTROL_BUSY:
1118                 case AST_CONTROL_CONGESTION:
1119                         playtone(p->handle, &Busytone);
1120                         p->state = VPB_STATE_PLAYBUSY;
1121                         vpb_timer_stop(p->busy_timer); 
1122                         vpb_timer_start(p->busy_timer); 
1123                         break;
1124                 case AST_CONTROL_RINGING:
1125                         playtone(p->handle, &Ringbacktone);
1126                         p->state = VPB_STATE_PLAYRING;
1127                         if (option_verbose > 3)
1128                                 ast_verbose(VERBOSE_PREFIX_4 "%s: vpb indicate: setting ringback timer [%d]\n", p->dev,p->ringback_timer_id);
1129                         
1130                         vpb_timer_stop(p->ringback_timer);
1131                         vpb_timer_start(p->ringback_timer);
1132                         break;      
1133                 case AST_CONTROL_ANSWER:
1134                 case -1: /* -1 means stop playing? */
1135                         vpb_timer_stop(p->ringback_timer);
1136                         vpb_timer_stop(p->busy_timer);
1137                         stoptone(p->handle);
1138                         break;
1139                 case AST_CONTROL_HANGUP:
1140                         playtone(p->handle, &Busytone);
1141                         p->state = VPB_STATE_PLAYBUSY;
1142                         vpb_timer_stop(p->busy_timer);
1143                         vpb_timer_start(p->busy_timer);
1144                         break;
1145
1146                 default:
1147                         res = 0;
1148                         break;
1149         }
1150         tmp = ast_mutex_unlock(&p->lock);
1151         if (option_verbose > 3) ast_verbose("%s: unLOCKING in indicate [%d]\n", p->dev,tmp);
1152         return res;
1153 }
1154
1155 static int vpb_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
1156 {
1157         struct vpb_pvt *p = (struct vpb_pvt *)newchan->pvt->pvt;
1158         int res = 0;
1159
1160         if (option_verbose > 3) ast_verbose("%s: LOCKING in fixup \n", p->dev);
1161         ast_mutex_lock(&p->lock);
1162         ast_log(LOG_DEBUG, "New owner for channel %s is %s\n", p->dev, newchan->name);
1163
1164         if (p->owner == oldchan) {
1165                 p->owner = newchan;
1166         }
1167
1168         if (newchan->_state == AST_STATE_RINGING) 
1169                 vpb_indicate(newchan, AST_CONTROL_RINGING);
1170
1171         res= ast_mutex_unlock(&p->lock);
1172         if (option_verbose > 3) ast_verbose("%s: unLOCKING in fixup [%d]\n", p->dev,res);
1173         return 0;
1174 }
1175
1176 static int vpb_digit(struct ast_channel *ast, char digit)
1177 {
1178         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1179         char s[2];
1180         int res = 0;
1181
1182         if (option_verbose > 3) ast_verbose("%s: LOCKING in digit \n", p->dev);
1183         ast_mutex_lock(&p->lock);
1184
1185
1186         s[0] = digit;
1187         s[1] = '\0';
1188
1189         if (option_verbose > 3)
1190                 ast_verbose(VERBOSE_PREFIX_4 "%s: play digit[%s]\n", p->dev, s);
1191
1192         ast_mutex_lock(&p->play_dtmf_lock);
1193         strncat(p->play_dtmf,s,sizeof(*p->play_dtmf));
1194         ast_mutex_unlock(&p->play_dtmf_lock);
1195
1196         res = ast_mutex_unlock(&p->lock);
1197         if (option_verbose > 3) ast_verbose("%s: unLOCKING in digit [%d]\n", p->dev,res);
1198         return 0;
1199 }
1200
1201 static int vpb_call(struct ast_channel *ast, char *dest, int timeout)
1202 {
1203         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1204         int res = 0,i;
1205         char *s = strrchr(dest, '/');
1206         char dialstring[254];
1207         int tmp = 0;
1208
1209         if (option_verbose > 3) ast_verbose("%s: LOCKING in call \n", p->dev);
1210         ast_mutex_lock(&p->lock);
1211
1212         if (s)
1213                 s = s + 1;
1214         else
1215                 s = dest;
1216         strcpy(dialstring,s);
1217         for (i=0; dialstring[i] != '\0' ; i++) {
1218                 if ((dialstring[i] == 'w') || (dialstring[i] == 'W'))
1219                         dialstring[i] = ',';
1220                 else if ((dialstring[i] == 'f') || (dialstring[i] == 'F'))
1221                         dialstring[i] = '&';
1222         }       
1223         if (option_verbose > 3)
1224                 ast_verbose(VERBOSE_PREFIX_4 "%s: starting call\n", p->dev);
1225
1226         if (ast->_state != AST_STATE_DOWN && ast->_state != AST_STATE_RESERVED) {
1227                 ast_log(LOG_WARNING, "vpb_call on %s neither down nor reserved!\n", ast->name);
1228                 tmp = ast_mutex_unlock(&p->lock);
1229                 if (option_verbose > 3) ast_verbose("%s: unLOCKING in call [%d]\n", p->dev,tmp);
1230                 return -1;
1231         }
1232         if (p->mode != MODE_FXO)  /* Station port, ring it. */
1233                 res = vpb_ring_station_async(p->handle, VPB_RING_STATION_ON,0);       
1234         else {
1235                 VPB_CALL call;
1236
1237                 // Dial must timeout or it can leave channels unuseable
1238                 if( timeout == 0 )
1239                         timeout = TIMER_PERIOD_NOANSWER;
1240                 else 
1241                         timeout = timeout * 1000; //convert from secs to ms.
1242
1243                 // These timeouts are only used with call progress dialing
1244                 call.dialtones = 1; // Number of dialtones to get outside line
1245                 call.dialtone_timeout = VPB_DIALTONE_WAIT; // Wait this long for dialtone (ms)
1246                 call.ringback_timeout = VPB_RINGWAIT; // Wait this long for ringing after dialing (ms)
1247                 call.inter_ringback_timeout = VPB_CONNECTED_WAIT; // If ringing stops for this long consider it connected (ms)
1248                 call.answer_timeout = timeout; // Time to wait for answer after ringing starts (ms)
1249                 memcpy( &call.tone_map,  DialToneMap, sizeof(DialToneMap) );
1250                 vpb_set_call(p->handle, &call);
1251
1252                 if (option_verbose > 1)
1253                         ast_verbose(VERBOSE_PREFIX_2 "%s: Calling %s on %s \n",p->dev, dialstring, ast->name); 
1254
1255                 if (option_verbose > 2) {
1256                         int j;
1257                         ast_verbose(VERBOSE_PREFIX_2 "%s: Dial parms for %s %d/%dms/%dms/%dms/%dms\n", p->dev
1258                                 , ast->name, call.dialtones, call.dialtone_timeout
1259                                 , call.ringback_timeout, call.inter_ringback_timeout
1260                                 , call.answer_timeout );
1261                         for( j=0; !call.tone_map[j].terminate; j++ )
1262                                 ast_verbose(VERBOSE_PREFIX_2 "%s: Dial parms for %s tone %d->%d\n", p->dev,
1263                                         ast->name, call.tone_map[j].tone_id, call.tone_map[j].call_id); 
1264                 }
1265
1266                 vpb_sethook_sync(p->handle,VPB_OFFHOOK);
1267                 p->state=VPB_STATE_OFFHOOK;
1268
1269                 #ifndef DIAL_WITH_CALL_PROGRESS
1270                 vpb_sleep(300);
1271                 res = vpb_dial_async(p->handle, dialstring);
1272                 #else
1273                 res = vpb_call_async(p->handle, dialstring);
1274                 #endif
1275
1276                 if (res != VPB_OK) {
1277                         ast_log(LOG_DEBUG, "Call on %s to %s failed: %s\n", ast->name, s, vpb_strerror(res));         
1278                         res = -1;
1279                 } else 
1280                         res = 0;
1281         }
1282
1283         if (option_verbose > 2)
1284                 ast_verbose(VERBOSE_PREFIX_3 "%s: VPB Calling %s [t=%d] on %s returned %d\n",p->dev , s, timeout, ast->name, res); 
1285         if (res == 0) {
1286                 ast_setstate(ast, AST_STATE_RINGING);
1287                 ast_queue_control(ast,AST_CONTROL_RINGING);             
1288         }
1289
1290         if (!p->readthread){
1291                 pthread_create(&p->readthread, NULL, do_chanreads, (void *)p);
1292         }
1293
1294         tmp = ast_mutex_unlock(&p->lock);
1295         if (option_verbose > 3) ast_verbose("%s: unLOCKING in call [%d]\n", p->dev,tmp);
1296         return res;
1297 }
1298
1299 static int vpb_hangup(struct ast_channel *ast)
1300 {
1301         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1302         VPB_EVENT je;
1303         char str[VPB_MAX_STR];
1304         int res =0 ;
1305
1306         if (option_verbose > 3) ast_verbose("%s: LOCKING in hangup \n", p->dev);
1307         ast_mutex_lock(&p->lock);
1308         if (option_verbose > 1) 
1309                 ast_verbose(VERBOSE_PREFIX_2 "%s: Hangup requested\n", ast->name);
1310
1311         if (!ast->pvt || !ast->pvt->pvt) {
1312                 ast_log(LOG_WARNING, "%s: channel not connected?\n", ast->name);
1313                 res = ast_mutex_unlock(&p->lock);
1314                 if (option_verbose > 3) ast_verbose("%s: unLOCKING in hangup [%d]\n", p->dev,res);
1315                 return 0;
1316         }
1317
1318         if(option_verbose>3) 
1319                 ast_verbose( VERBOSE_PREFIX_4 "%s: Setting state down\n",ast->name);
1320         ast_setstate(ast,AST_STATE_DOWN);
1321
1322
1323         /* Stop record */
1324         p->stopreads = 1;
1325         if( p->readthread ){
1326                 pthread_join(p->readthread, NULL); 
1327                 if(option_verbose>3) 
1328                         ast_verbose( VERBOSE_PREFIX_4 "%s: stopped record thread on %s\n",ast->name,p->dev);
1329         }
1330
1331         /* Stop play */
1332         if (p->lastoutput != -1) {
1333                 if(option_verbose>1) 
1334                         ast_verbose( VERBOSE_PREFIX_2 "%s: Ending play mode on %s\n",ast->name,p->dev);
1335                 vpb_play_terminate(p->handle);
1336                 ast_mutex_lock(&p->play_lock); {
1337                         vpb_play_buf_finish(p->handle);
1338                 } ast_mutex_unlock(&p->play_lock);
1339         }
1340
1341         if (p->mode != MODE_FXO) { 
1342                 /* station port. */
1343                 vpb_ring_station_async(p->handle, VPB_RING_STATION_OFF,0);      
1344                 if(p->state!=VPB_STATE_ONHOOK){
1345                         /* This is causing a "dial end" "play tone" loop
1346                         playtone(p->handle, &Busytone); 
1347                         p->state = VPB_STATE_PLAYBUSY;
1348                         if(option_verbose>4) 
1349                                 ast_verbose( VERBOSE_PREFIX_4 "%s: Station offhook[%d], playing busy tone\n",
1350                                                                 ast->name,p->state);
1351                         */
1352                 }
1353                 else {
1354                         stoptone(p->handle);
1355                 }
1356         } else {
1357                 stoptone(p->handle); // Terminates any dialing
1358                 vpb_sethook_sync(p->handle, VPB_ONHOOK);
1359                 p->state=VPB_STATE_ONHOOK;
1360         }
1361         while (VPB_OK==vpb_get_event_ch_async(p->handle,&je)){
1362                 if(option_verbose>3) {
1363                         vpb_translate_event(&je, str);
1364                         ast_verbose( VERBOSE_PREFIX_4 "%s: Flushing event [%d]=>%s\n",ast->name,je.type,str);
1365                 }
1366         }
1367
1368         p->readthread = 0;
1369         p->lastoutput = -1;
1370         p->lastinput = -1;
1371         p->last_ignore_dtmf = 1;
1372         p->ext[0]  = 0;
1373         p->dialtone = 0;
1374
1375         p->owner = NULL;
1376         ast->pvt->pvt=NULL;
1377
1378         ast_mutex_lock(&usecnt_lock); {
1379                 usecnt--;
1380         } ast_mutex_unlock(&usecnt_lock);
1381         ast_update_use_count();
1382
1383         if (option_verbose > 1)
1384                 ast_verbose(VERBOSE_PREFIX_2 "%s: Hangup complete\n", ast->name);
1385
1386         restart_monitor();
1387         res = ast_mutex_unlock(&p->lock);
1388         if (option_verbose > 3) ast_verbose("%s: unLOCKING in hangup [%d]\n", p->dev,res);
1389         return 0;
1390 }
1391
1392 static int vpb_answer(struct ast_channel *ast)
1393 {
1394         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt;
1395         VPB_EVENT je;
1396         int ret;
1397         int res = 0;
1398         if (option_verbose > 3) ast_verbose("%s: LOCKING in answer \n", p->dev);
1399         ast_mutex_lock(&p->lock);
1400
1401         if (option_verbose > 3)
1402                         ast_verbose(VERBOSE_PREFIX_4 "%s: Answering channel\n",p->dev);
1403
1404         if (ast->_state != AST_STATE_UP) {
1405                 if (p->mode == MODE_FXO){
1406                         vpb_sethook_sync(p->handle, VPB_OFFHOOK);
1407                         p->state=VPB_STATE_OFFHOOK;
1408                         vpb_sleep(500);
1409                         ret = vpb_get_event_ch_async(p->handle,&je);
1410                         if ((ret == VPB_OK)&&(je.type != VPB_DROP)){
1411                                 if (option_verbose > 3){
1412                                                 ast_verbose(VERBOSE_PREFIX_4 "%s: Answer collected a wrong event!!\n",p->dev);
1413                                 }
1414                                 vpb_put_event(&je);
1415                         }
1416                 }
1417                 ast_setstate(ast, AST_STATE_UP);
1418
1419                 if(option_verbose>1) 
1420                         ast_verbose( VERBOSE_PREFIX_2 "%s: Answered call from %s on %s [%s]\n", p->dev,
1421                                         p->owner->callerid, ast->name,(p->mode == MODE_FXO)?"FXO":"FXS");
1422
1423                 ast->rings = 0;
1424                 if( !p->readthread ){
1425         //              res = ast_mutex_unlock(&p->lock);
1426         //              ast_verbose("%s: unLOCKING in answer [%d]\n", p->dev,res);
1427                         pthread_create(&p->readthread, NULL, do_chanreads, (void *)p);
1428                 } else {
1429                         if(option_verbose>3) 
1430                                 ast_verbose(VERBOSE_PREFIX_4 "%s: Record thread already running!!\n",p->dev);
1431                 }
1432         } else {
1433                 if(option_verbose>3) {
1434                         ast_verbose(VERBOSE_PREFIX_4 "%s: Answered state is up\n",p->dev);
1435                 }
1436         //      res = ast_mutex_unlock(&p->lock);
1437         //      ast_verbose("%s: unLOCKING in answer [%d]\n", p->dev,res);
1438         }
1439         res = ast_mutex_unlock(&p->lock);
1440         if(option_verbose>3) ast_verbose("%s: unLOCKING in answer [%d]\n", p->dev,res);
1441         return 0;
1442 }
1443
1444 static struct ast_frame  *vpb_read(struct ast_channel *ast)
1445 {
1446         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt; 
1447         static struct ast_frame f = {AST_FRAME_NULL}; 
1448
1449         f.src = type;
1450         ast_log(LOG_NOTICE, "vpb_read should never be called (chan=%s)!\n", p->dev);
1451
1452         return &f;
1453 }
1454
1455 static inline int ast2vpbformat(int ast_format)
1456 {
1457         switch(ast_format) {
1458                 case AST_FORMAT_ALAW:
1459                         return VPB_ALAW;
1460                 case AST_FORMAT_SLINEAR:
1461                         return VPB_LINEAR;
1462                 case AST_FORMAT_ULAW:
1463                         return VPB_MULAW;
1464                 case AST_FORMAT_ADPCM:
1465                         return VPB_OKIADPCM;
1466                 default:
1467                         return -1;
1468         }
1469 }
1470
1471 static inline int astformatbits(int ast_format)
1472 {
1473         switch(ast_format) {
1474                 case AST_FORMAT_ALAW:
1475                 case AST_FORMAT_ULAW:
1476                         return 8;
1477                 case AST_FORMAT_SLINEAR:
1478                         return 16;
1479                 case AST_FORMAT_ADPCM:
1480                         return 4;
1481                 default:
1482                         return 8;
1483         }   
1484 }
1485
1486 int gain_vector(float g, short *v, int n) 
1487 {
1488         int i;
1489         float tmp;
1490         for ( i = 0; i<n; i++) {
1491                 tmp = g*v[i];
1492                 if (tmp > 32767.0)
1493                         tmp = 32767.0;
1494                 if (tmp < -32768.0)
1495                         tmp = -32768.0;
1496                 v[i] = (short)tmp;      
1497         }  
1498         return(i);
1499 }
1500
1501 static int vpb_write(struct ast_channel *ast, struct ast_frame *frame)
1502 {
1503         struct vpb_pvt *p = (struct vpb_pvt *)ast->pvt->pvt; 
1504         int res = 0, fmt = 0;
1505 //      ast_mutex_lock(&p->lock);
1506         if(option_verbose>5) 
1507                 ast_verbose( VERBOSE_PREFIX_4 "%s: Writing to channel\n", p->dev);
1508
1509         if (frame->frametype != AST_FRAME_VOICE) {
1510                 if(option_verbose>3) 
1511                         ast_verbose( VERBOSE_PREFIX_4 "%s: Don't know how to handle from type %d\n", ast->name, frame->frametype);
1512 //              ast_mutex_unlock(&p->lock);
1513                 return 0;
1514         } else if (ast->_state != AST_STATE_UP) {
1515                 if(option_verbose>3) 
1516                         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);
1517                 p->lastoutput = -1;
1518 //              ast_mutex_unlock(&p->lock);
1519                 return 0;
1520         }
1521
1522         fmt = ast2vpbformat(frame->subclass);
1523         if (fmt < 0) {
1524                 ast_log(LOG_WARNING, "%s: vpb_write Cannot handle frames of %d format!\n",ast->name, frame->subclass);
1525                 return -1;
1526         }
1527
1528         ast_mutex_lock(&p->play_lock);
1529
1530         if (p->lastoutput == -1) {
1531                 vpb_play_buf_start(p->handle, fmt);
1532                 if(option_verbose>1) 
1533                         ast_verbose( VERBOSE_PREFIX_2 "%s: Starting play mode (codec=%d)\n",p->dev,fmt);
1534         } else if (p->lastoutput != fmt) {
1535                 vpb_play_buf_finish(p->handle);
1536                 vpb_play_buf_start(p->handle, fmt);
1537                 if(option_verbose>1) 
1538                         ast_verbose( VERBOSE_PREFIX_2 "%s: Changed play format (%d=>%d)\n",p->dev,p->lastoutput,fmt);
1539         }
1540
1541         p->lastoutput = fmt;
1542
1543         // Apply extra gain !
1544         if( p->txswgain > MAX_VPB_GAIN )
1545                 gain_vector(p->txswgain - MAX_VPB_GAIN , (short*)frame->data, frame->datalen/sizeof(short));
1546
1547         res = vpb_play_buf_sync(p->handle, (char*)frame->data, frame->datalen);
1548         if( (res == VPB_OK) && (option_verbose > 5) ) {
1549                 short * data = (short*)frame->data;
1550                 ast_verbose("%s: Write chan (codec=%d) %d %d\n", p->dev, fmt, data[0],data[1]);
1551         }
1552
1553         ast_mutex_unlock(&p->play_lock);
1554 //      ast_mutex_unlock(&p->lock);
1555         return 0;
1556 }
1557
1558 /* Read monitor thread function. */
1559 static void *do_chanreads(void *pvt)
1560 {
1561         struct vpb_pvt *p = (struct vpb_pvt *)pvt;
1562         struct ast_frame *fr = &p->fr;
1563         char *readbuf = ((char *)p->buf) + AST_FRIENDLY_OFFSET;
1564         int bridgerec = 0;
1565         int afmt, readlen, res, fmt;
1566         int ignore_dtmf;
1567         char * getdtmf_var = NULL;
1568
1569         fr->frametype = AST_FRAME_VOICE;
1570         fr->src = type;
1571         fr->mallocd = 0;
1572         fr->samples = VPB_SAMPLES;
1573         fr->offset = AST_FRIENDLY_OFFSET;
1574         memset(p->buf, 0, sizeof p->buf);
1575
1576         if (option_verbose > 4) {
1577                 ast_verbose("%s: chanreads: starting thread\n", p->dev);
1578         }  
1579         ast_mutex_lock(&p->record_lock);
1580
1581         p->stopreads = 0; 
1582         while (!p->stopreads && p->owner) {
1583
1584                 if (option_verbose > 4)
1585                         ast_verbose("%s: chanreads: Starting cycle ...\n", p->dev);
1586                 res = ast_mutex_trylock(&p->lock);
1587                 if (res !=0){
1588                         if (res == EINVAL )
1589                                 if (option_verbose > 4) ast_verbose("%s: chanreads: try lock gave me EINVAL[%d]\n", p->dev,res);
1590                         else if (res == EBUSY )
1591                                 if (option_verbose > 4) ast_verbose("%s: chanreads: try lock gave me EBUSY[%d]\n", p->dev,res);
1592                         res = ast_mutex_unlock(&p->lock);
1593                         if (res == EINVAL )
1594                                 if (option_verbose > 4) ast_verbose("%s: chanreads: Releasing it gave me EINVAL[%d]\n", p->dev,res);
1595                         else if (res == EPERM )
1596                                 if (option_verbose > 4) ast_verbose("%s: chanreads: Releasing it gave me EPERM[%d]\n", p->dev,res);
1597                         res = ast_mutex_trylock(&p->lock);
1598                         if (res == EINVAL )
1599                                 if (option_verbose > 4) ast_verbose("%s: chanreads: trying again it gave me EINVAL[%d]\n", p->dev,res);
1600                         else if (res == EBUSY )
1601                                 if (option_verbose > 4) ast_verbose("%s: chanreads: trying again it gave me EBUSY[%d]\n", p->dev,res);
1602                 }
1603                 if (res==0)  {
1604                         if (option_verbose > 4)
1605                                 ast_verbose("%s: chanreads: Checking bridge \n", p->dev);
1606                         if (p->bridge) {
1607                                 if (p->bridge->c0 == p->owner && (p->bridge->flags & AST_BRIDGE_REC_CHANNEL_0))
1608                                         bridgerec = 1;
1609                                 else if (p->bridge->c1 == p->owner && (p->bridge->flags & AST_BRIDGE_REC_CHANNEL_1))
1610                                         bridgerec = 1;
1611                                 else 
1612                                         bridgerec = 0;
1613                         } else {
1614                                 bridgerec = 1;
1615                         }
1616                         ast_mutex_unlock(&p->lock);
1617                 } else {
1618                         if (option_verbose > 4)
1619                                 ast_verbose("%s: chanreads: Couldnt get channel lock to check bridges!!\n", p->dev);
1620                 }
1621
1622                 if ( (p->owner->_state != AST_STATE_UP) || !bridgerec) {
1623                         if (option_verbose > 4) {
1624                                 ast_verbose("%s: chanreads: owner not up[%d] or no bridgerec[%d]\n", p->dev,p->owner->_state,bridgerec);
1625                         }  
1626                         vpb_sleep(10);
1627                         continue;
1628                 }
1629
1630                 // Voicetronix DTMF detection can be triggered off ordinary speech
1631                 // This leads to annoying beeps during the conversation
1632                 // Avoid this problem by just setting VPB_GETDTMF when you want to listen for DTMF
1633                 //ignore_dtmf = 1;
1634                 ignore_dtmf = 0; /* set this to 1 to turn this feature on */
1635                 getdtmf_var = pbx_builtin_getvar_helper(p->owner,"VPB_GETDTMF");
1636                 if( getdtmf_var && ( strcasecmp( getdtmf_var, "yes" ) == 0 ) )
1637                         ignore_dtmf = 0;
1638
1639                 if( ignore_dtmf != p->last_ignore_dtmf ) {
1640                         if(option_verbose>1) 
1641                                 ast_verbose( VERBOSE_PREFIX_2 "%s:Now %s DTMF \n",
1642                                         p->dev, ignore_dtmf ? "ignoring" : "listening for");
1643                         vpb_set_event_mask(p->handle, ignore_dtmf ? VPB_EVENTS_NODTMF : VPB_EVENTS_ALL );
1644                 }
1645                 p->last_ignore_dtmf = ignore_dtmf;
1646
1647                 // Play DTMF digits here to avoid problem you get if playing a digit during
1648                 // a record operation
1649                 if (option_verbose > 5) {
1650                         ast_verbose("%s: chanreads: Checking dtmf's \n", p->dev);
1651                 }  
1652                 ast_mutex_lock(&p->play_dtmf_lock);
1653                 if( p->play_dtmf[0] ) {
1654                         // Try to ignore DTMF event we get after playing digit
1655                         // This DTMF is played by asterisk and leads to an annoying trailing beep on CISCO phones
1656                         if( !ignore_dtmf) 
1657                                 vpb_set_event_mask(p->handle, VPB_EVENTS_NODTMF );
1658                         vpb_dial_sync(p->handle,p->play_dtmf);
1659                         if(option_verbose>1) 
1660                                 ast_verbose( VERBOSE_PREFIX_2 "%s: Played DTMF %s\n",p->dev,p->play_dtmf);
1661                         p->play_dtmf[0] = '\0';
1662                         ast_mutex_unlock(&p->play_dtmf_lock);
1663                         vpb_sleep(700); // Long enough to miss echo and DTMF event
1664                         if( !ignore_dtmf) 
1665                                 vpb_set_event_mask(p->handle, VPB_EVENTS_ALL );
1666                         continue;
1667                 }
1668                 ast_mutex_unlock(&p->play_dtmf_lock);
1669
1670                 afmt = (p->owner) ? p->owner->pvt->rawreadformat : AST_FORMAT_SLINEAR;
1671                 fmt = ast2vpbformat(afmt);
1672                 if (fmt < 0) {
1673                         ast_log(LOG_WARNING,"%s: Record failure (unsupported format %d)\n", p->dev, afmt);
1674                         return NULL;
1675                 }
1676                 readlen = VPB_SAMPLES * astformatbits(afmt) / 8;
1677
1678                 if (p->lastinput == -1) {
1679                         vpb_record_buf_start(p->handle, fmt);
1680                         vpb_reset_record_fifo_alarm(p->handle);
1681                         if(option_verbose>1) 
1682                                 ast_verbose( VERBOSE_PREFIX_2 "%s: Starting record mode (codec=%d)\n",p->dev,fmt);
1683                 } else if (p->lastinput != fmt) {
1684                         vpb_record_buf_finish(p->handle);
1685                         vpb_record_buf_start(p->handle, fmt);
1686                         if(option_verbose>1) 
1687                                 ast_verbose( VERBOSE_PREFIX_2 "%s: Changed record format (%d=>%d)\n",p->dev,p->lastinput,fmt);
1688                 }
1689                 p->lastinput = fmt;
1690
1691                 /* Read only if up and not bridged, or a bridge for which we can read. */
1692                 if (option_verbose > 5) {
1693                         ast_verbose("%s: chanreads: getting buffer!\n", p->dev);
1694                 }  
1695                 if( (res = vpb_record_buf_sync(p->handle, readbuf, readlen) ) == VPB_OK ) {
1696                         if (option_verbose > 5) {
1697                                 ast_verbose("%s: chanreads: got buffer!\n", p->dev);
1698                         }  
1699                         // Apply extra gain !
1700                         if( p->rxswgain > MAX_VPB_GAIN )
1701                                 gain_vector(p->rxswgain - MAX_VPB_GAIN , (short*)readbuf, readlen/sizeof(short));
1702                         if (option_verbose > 5) {
1703                                 ast_verbose("%s: chanreads: applied gain\n", p->dev);
1704                         }  
1705
1706                         fr->subclass = afmt;
1707                         fr->data = readbuf;
1708                         fr->datalen = readlen;
1709
1710                         // Using trylock here to prevent deadlock when channel is hungup
1711                         // (ast_hangup() immediately gets lock)
1712                         if (p->owner && !p->stopreads ) {
1713                                 if (option_verbose > 5) {
1714                                         ast_verbose("%s: chanreads: queueing buffer on frame (state[%d])\n", p->dev,p->owner->_state);
1715                                 }  
1716                                 
1717                                 res = ast_mutex_trylock(&p->owner->lock);
1718                                 if (res==0)  {
1719                                         ast_queue_frame(p->owner, fr);
1720                                         ast_mutex_unlock(&p->owner->lock);
1721                                 } else {
1722                                         if (res == EINVAL )
1723                                                 if (option_verbose > 4) ast_verbose("%s: chanreads: try owner->lock gave me EINVAL[%d]\n", p->dev,res);
1724                                         else if (res == EBUSY )
1725                                                 if (option_verbose > 4) ast_verbose("%s: chanreads: try owner->lock gave me EBUSY[%d]\n", p->dev,res);
1726                                         res = ast_mutex_unlock(&p->lock);
1727                                         if (res == EINVAL )
1728                                                 if (option_verbose > 4) ast_verbose("%s: chanreads: Releasing pvt->lock it gave me EINVAL[%d]\n", p->dev,res);
1729                                         else if (res == EPERM )
1730                                                 if (option_verbose > 4) ast_verbose("%s: chanreads: Releasing pvt->lock it gave me EPERM[%d]\n", p->dev,res);
1731                                         res = ast_mutex_trylock(&p->lock);
1732                                         if (res == EINVAL )
1733                                                 if (option_verbose > 4) ast_verbose("%s: chanreads: trying pvt->lock again it gave me EINVAL[%d]\n", p->dev,res);
1734                                         else if (res == EBUSY )
1735                                                 if (option_verbose > 4) ast_verbose("%s: chanreads: trying pvt->lock again it gave me EBUSY[%d]\n", p->dev,res);
1736                                         res = ast_mutex_trylock(&p->owner->lock);
1737                                         if (res==0)  {
1738                                                 ast_queue_frame(p->owner, fr);
1739                                                 ast_mutex_unlock(&p->owner->lock);
1740                                         }
1741                                         else {
1742                                                 if (res == EINVAL )
1743                                                         if (option_verbose > 4) ast_verbose("%s: chanreads: try owner->lock gave me EINVAL[%d]\n", p->dev,res);
1744                                                 else if (res == EBUSY )
1745                                                         if (option_verbose > 4) ast_verbose("%s: chanreads: try owner->lock gave me EBUSY[%d]\n", p->dev,res);
1746                                                 if (option_verbose > 3) 
1747                                                         if (option_verbose > 4) ast_verbose("%s: chanreads: Couldnt get lock on owner channel to send frame!\n", p->dev);
1748                                                 //assert(p->dev!=p->dev);
1749                                         }
1750                                 }
1751                                 if (option_verbose > 6) {
1752                                         short * data = (short*)readbuf;
1753                                         ast_verbose("%s: Read channel (codec=%d) %d %d\n", p->dev, fmt, data[0], data[1] );
1754                                 }  
1755                         }
1756                         else {
1757                                 if (option_verbose > 4) {
1758                                         ast_verbose("%s: p->stopreads[%d] p->owner[%p]\n", p->dev, p->stopreads,(void *)p->owner);
1759                                 }  
1760                         }
1761                 } else {
1762                         ast_log(LOG_WARNING,"%s: Record failure (%s)\n", p->dev, vpb_strerror(res));
1763                         vpb_record_buf_finish(p->handle);
1764                         vpb_record_buf_start(p->handle, fmt);
1765                 }
1766                 if (option_verbose > 4)
1767                         ast_verbose("%s: chanreads: Finished cycle...\n", p->dev);
1768         }
1769
1770         /* When stopreads seen, go away! */
1771         vpb_record_buf_finish(p->handle);
1772         ast_mutex_unlock(&p->record_lock);
1773
1774         if (option_verbose > 1)
1775                 ast_verbose(VERBOSE_PREFIX_2 "%s: Ending record mode (%d/%s)\n",
1776                          p->dev, p->stopreads, p->owner? "yes" : "no");     
1777         return NULL;
1778 }
1779
1780 static struct ast_channel *vpb_new(struct vpb_pvt *i, int state, char *context)
1781 {
1782         struct ast_channel *tmp; 
1783
1784         if (i->owner) {
1785             ast_log(LOG_WARNING, "Called vpb_new on owned channel (%s) ?!\n", i->dev);
1786             return NULL;
1787         }
1788             
1789         tmp = ast_channel_alloc(1);
1790         if (tmp) {
1791                 strncpy(tmp->name, i->dev, sizeof(tmp->name));
1792                 tmp->type = type;
1793                
1794                 // Linear is the preferred format. Although Voicetronix supports other formats
1795                 // they are all converted to/from linear in the vpb code. Best for us to use
1796                 // linear since we can then adjust volume in this modules.
1797                 tmp->nativeformats = prefformat;
1798                 tmp->pvt->rawreadformat = AST_FORMAT_SLINEAR;
1799                 tmp->pvt->rawwriteformat =  AST_FORMAT_SLINEAR;
1800                 ast_setstate(tmp, state);
1801                 if (state == AST_STATE_RING)
1802                         tmp->rings = 1;
1803                 tmp->pvt->pvt = i;
1804                 /* set call backs */
1805                 tmp->pvt->send_digit = vpb_digit;
1806                 tmp->pvt->call = vpb_call;
1807                 tmp->pvt->hangup = vpb_hangup;
1808                 tmp->pvt->answer = vpb_answer;
1809                 tmp->pvt->read = vpb_read;
1810                 tmp->pvt->write = vpb_write;
1811                 tmp->pvt->bridge = vpb_bridge;
1812                 tmp->pvt->indicate = vpb_indicate;
1813                 tmp->pvt->fixup = vpb_fixup;
1814                 
1815                 strncpy(tmp->context, context, sizeof(tmp->context)-1);
1816                 if (strlen(i->ext))
1817                         strncpy(tmp->exten, i->ext, sizeof(tmp->exten)-1);
1818                 else
1819                         strncpy(tmp->exten, "s",  sizeof(tmp->exten) - 1);
1820                 if (strlen(i->language))
1821                         strncpy(tmp->language, i->language, sizeof(tmp->language)-1);
1822
1823                 i->owner = tmp;
1824      
1825                 i->bridge = NULL;
1826                 i->lastoutput = -1;
1827                 i->lastinput = -1;
1828                 i->last_ignore_dtmf = 1;
1829                 i->readthread = 0;
1830                 i->play_dtmf[0] = '\0';
1831                 
1832                 i->lastgrunt  = get_time_in_ms(); /* Assume at least one grunt tone seen now. */
1833
1834                 ast_mutex_lock(&usecnt_lock);
1835                 usecnt++;
1836                 ast_mutex_unlock(&usecnt_lock);
1837                 ast_update_use_count();
1838                 if (state != AST_STATE_DOWN) {
1839                         if (ast_pbx_start(tmp)) {
1840                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
1841                                 ast_hangup(tmp);
1842                         }
1843                 }
1844         } else {
1845                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
1846         }
1847         return tmp;
1848 }
1849
1850 static struct ast_channel *vpb_request(char *type, int format, void *data) 
1851 {
1852         int oldformat;
1853         struct vpb_pvt *p;
1854         struct ast_channel *tmp = NULL;
1855         char *name = strdup(data ? (char *)data : "");
1856         char *s, *sepstr;
1857         int group=-1;
1858
1859         oldformat = format;
1860         format &= prefformat;
1861         if (!format) {
1862                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", oldformat);
1863                 return NULL;
1864         }
1865
1866         sepstr = name;
1867         s = strsep(&sepstr, "/"); /* Handle / issues */
1868         if (!s) 
1869                 s = "";
1870         /* Check if we are looking for a group */
1871         if (toupper(name[0]) == 'G' || toupper(name[0])=='R') {
1872                 group=atoi(name+1);     
1873         }
1874         /* Search for an unowned channel */
1875         ast_mutex_lock(&iflock); {
1876                 p = iflist;
1877                 while(p) {
1878                         if (group == -1){
1879                                 if (strncmp(s, p->dev + 4, sizeof p->dev) == 0) {
1880                                         if (!p->owner) {
1881                                                 tmp = vpb_new(p, AST_STATE_DOWN, p->context);
1882                                                 break;
1883                                         }
1884                                 }
1885                         }
1886                         else {
1887                                 if ((p->group == group) && (!p->owner)) {
1888                                         tmp = vpb_new(p, AST_STATE_DOWN, p->context);
1889                                         break;
1890                                 }
1891                         }
1892                         p = p->next;
1893                 }
1894         } ast_mutex_unlock(&iflock);
1895
1896
1897         if (option_verbose > 1) 
1898                 ast_verbose(VERBOSE_PREFIX_2 " %s requested, got: [%s]\n",
1899                 name, tmp ? tmp->name : "None");
1900
1901         free(name);
1902
1903         restart_monitor();
1904         return tmp;
1905 }
1906
1907 static float parse_gain_value(char *gain_type, char *value)
1908 {
1909         float gain;
1910
1911         /* try to scan number */
1912         if (sscanf(value, "%f", &gain) != 1)
1913         {
1914                 ast_log(LOG_ERROR, "Invalid %s value '%s' in '%s' config\n", value, gain_type, config);
1915                 return DEFAULT_GAIN;
1916         }
1917
1918
1919         /* percentage? */
1920         //if (value[strlen(value) - 1] == '%')
1921         //      return gain / (float)100;
1922
1923         return gain;
1924 }
1925
1926 int load_module()
1927 {
1928         struct ast_config *cfg;
1929         struct ast_variable *v;
1930         struct vpb_pvt *tmp;
1931         int board = 0, group = 0;
1932         int mode = MODE_IMMEDIATE;
1933         float txgain = DEFAULT_GAIN, rxgain = DEFAULT_GAIN; 
1934         float txswgain = 0, rxswgain = 0; 
1935         int first_channel = 1;
1936         int echo_cancel = DEFAULT_ECHO_CANCEL;
1937         int error = 0; /* Error flag */
1938         int bal1 = -1; // Special value - means do not set
1939         int bal2 = -1; 
1940         int bal3 = -1;
1941         char * callerid = NULL;
1942
1943         cfg = ast_load(config);
1944
1945         /* We *must* have a config file otherwise stop immediately */
1946         if (!cfg) {
1947                 ast_log(LOG_ERROR, "Unable to load config %s\n", config);
1948                 return -1;
1949         }  
1950
1951         vpb_seterrormode(VPB_ERROR_CODE);
1952
1953         ast_mutex_lock(&iflock); {
1954                 v = ast_variable_browse(cfg, "interfaces");
1955                 while(v) {
1956                         /* Create the interface list */
1957                         if (strcasecmp(v->name, "board") == 0) {
1958                                 board = atoi(v->value);
1959                         } else  if (strcasecmp(v->name, "group") == 0){
1960                                 group = atoi(v->value);
1961                         } else  if (strcasecmp(v->name, "useloopdrop") == 0){
1962                                 UseLoopDrop = atoi(v->value);
1963                         } else if (strcasecmp(v->name, "channel") == 0) {
1964                                 int channel = atoi(v->value);
1965                                 tmp = mkif(board, channel, mode, txgain, rxgain, txswgain, rxswgain, bal1, bal2, bal3, callerid, echo_cancel,group);
1966                                 if (tmp) {
1967                                         if(first_channel) {
1968                                                 mkbrd( tmp->vpb_model, echo_cancel );
1969                                                 first_channel = 0;
1970                                         }
1971                                         tmp->next = iflist;
1972                                         iflist = tmp;
1973                                 } else {
1974                                         ast_log(LOG_ERROR, 
1975                                         "Unable to register channel '%s'\n", v->value);
1976                                         error = -1;
1977                                         goto done;
1978                                 }
1979                                 callerid = NULL;
1980                         } else if (strcasecmp(v->name, "language") == 0) {
1981                                 strncpy(language, v->value, sizeof(language)-1);
1982                         } else if (strcasecmp(v->name, "callerid") == 0) {
1983                                 callerid = strdup(v->value);
1984                         } else if (strcasecmp(v->name, "mode") == 0) {
1985                                 if (strncasecmp(v->value, "di", 2) == 0) 
1986                                         mode = MODE_DIALTONE;
1987                                 else if (strncasecmp(v->value, "im", 2) == 0)
1988                                         mode = MODE_IMMEDIATE;
1989                                 else if (strncasecmp(v->value, "fx", 2) == 0)
1990                                         mode = MODE_FXO;
1991                                 else
1992                                         ast_log(LOG_WARNING, "Unknown mode: %s\n", v->value);
1993                         } else if (!strcasecmp(v->name, "context")) {
1994                                 strncpy(context, v->value, sizeof(context)-1);
1995                         } else if (!strcasecmp(v->name, "echocancel")) {
1996                                 if (!strcasecmp(v->value, "off")) 
1997                                         echo_cancel = 0;
1998                         } else if (strcasecmp(v->name, "txgain") == 0) {
1999                                 txswgain = parse_gain_value(v->name, v->value);
2000                         } else if (strcasecmp(v->name, "rxgain") == 0) {
2001                                 rxswgain = parse_gain_value(v->name, v->value);
2002                         } else if (strcasecmp(v->name, "txhwgain") == 0) {
2003                                 txgain = parse_gain_value(v->name, v->value);
2004                         } else if (strcasecmp(v->name, "rxhwgain") == 0) {
2005                                 rxgain = parse_gain_value(v->name, v->value);
2006                         } else if (strcasecmp(v->name, "bal1") == 0) {
2007                                 bal1 = strtol(v->value, NULL, 16);
2008                                 if(bal1<0 || bal1>255) {
2009                                         ast_log(LOG_WARNING, "Bad bal1 value: %d\n", bal1);
2010                                         bal1 = -1;
2011                                 }
2012                         } else if (strcasecmp(v->name, "bal2") == 0) {
2013                                 bal2 = strtol(v->value, NULL, 16);
2014                                 if(bal2<0 || bal2>255) {
2015                                         ast_log(LOG_WARNING, "Bad bal2 value: %d\n", bal2);
2016                                         bal2 = -1;
2017                                 }
2018                         } else if (strcasecmp(v->name, "bal3") == 0) {
2019                                 bal3 = strtol(v->value, NULL, 16);
2020                                 if(bal3<0 || bal3>255) {
2021                                         ast_log(LOG_WARNING, "Bad bal3 value: %d\n", bal3);
2022                                         bal3 = -1;
2023                                 }
2024                         } else if (strcasecmp(v->name, "grunttimeout") == 0) {
2025                                 gruntdetect_timeout = 1000*atoi(v->value);
2026                         }
2027                         v = v->next;
2028                 }
2029
2030                 if (gruntdetect_timeout < 1000)
2031                         gruntdetect_timeout = 1000;
2032
2033                 done: (void)0;
2034         } ast_mutex_unlock(&iflock);
2035
2036         ast_destroy(cfg);
2037
2038         if (!error && ast_channel_register(type, tdesc, prefformat, vpb_request) != 0) {
2039                 ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
2040                 error = -1;
2041         }
2042
2043
2044         if (error)
2045                 unload_module();
2046         else 
2047                 restart_monitor(); /* And start the monitor for the first time */
2048
2049         return error;
2050 }
2051
2052
2053 int unload_module()
2054 {
2055         struct vpb_pvt *p;
2056         /* First, take us out of the channel loop */
2057         ast_channel_unregister(type);
2058
2059         ast_mutex_lock(&iflock); {
2060                 /* Hangup all interfaces if they have an owner */
2061                 p = iflist;
2062                 while(p) {
2063                         if (p->owner)
2064                                 ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
2065                         p = p->next;
2066                 }
2067                 iflist = NULL;
2068         } ast_mutex_unlock(&iflock);
2069
2070         ast_mutex_lock(&monlock); {
2071                 if (mthreadactive > -1) {
2072                         pthread_cancel(monitor_thread);
2073                         pthread_join(monitor_thread, NULL);
2074                 }
2075                 mthreadactive = -2;
2076         } ast_mutex_unlock(&monlock);
2077
2078         ast_mutex_lock(&iflock); {
2079                 /* Destroy all the interfaces and free their memory */
2080
2081                 while(iflist) {
2082                         p = iflist;                 
2083                         ast_mutex_destroy(&p->lock);
2084                         pthread_cancel(p->readthread);
2085                         ast_mutex_destroy(&p->owner_lock);
2086                         ast_mutex_destroy(&p->record_lock);
2087                         ast_mutex_destroy(&p->play_lock);
2088                         ast_mutex_destroy(&p->play_dtmf_lock);
2089                         p->readthread = 0;
2090
2091                         vpb_close(p->handle);
2092
2093                         iflist = iflist->next;
2094
2095                         free(p);
2096                 }
2097                 iflist = NULL;
2098         } ast_mutex_unlock(&iflock);
2099
2100         ast_mutex_lock(&bridge_lock); {
2101                 memset(bridges, 0, sizeof bridges);          
2102         } ast_mutex_unlock(&bridge_lock);
2103         ast_mutex_destroy(&bridge_lock);
2104         for(int i = 0; i < max_bridges; i++ ) {
2105                 ast_mutex_destroy(&bridges[i].lock);
2106                 pthread_cond_destroy(&bridges[i].cond, NULL);
2107         }
2108         free(bridges);
2109
2110         return 0;
2111 }
2112
2113 int usecount()
2114 {
2115         int res;
2116         ast_mutex_lock(&usecnt_lock);
2117         res = usecnt;
2118         ast_mutex_unlock(&usecnt_lock);
2119         return res;
2120 }
2121
2122 char *description()
2123 {
2124         return desc;
2125 }
2126
2127 char *key()
2128 {
2129         return ASTERISK_GPL_KEY;
2130 }
2131
2132 #if defined(__cplusplus) || defined(c_plusplus)
2133  }
2134 #endif