Use new extensible setup method of libpri
[asterisk/asterisk.git] / channels / chan_zap.c
1 /*
2  * Asterisk -- A telephony toolkit for Linux.
3  *
4  * Zaptel Pseudo TDM interface 
5  * 
6  * Copyright (C) 2003 Digium
7  *
8  * Mark Spencer <markster@digium.com>
9  *
10  * This program is free software, distributed under the terms of
11  * the GNU General Public License
12  */
13
14 #include <stdio.h>
15 #include <string.h>
16 #include <asterisk/lock.h>
17 #include <asterisk/channel.h>
18 #include <asterisk/channel_pvt.h>
19 #include <asterisk/config.h>
20 #include <asterisk/logger.h>
21 #include <asterisk/module.h>
22 #include <asterisk/pbx.h>
23 #include <asterisk/options.h>
24 #include <asterisk/file.h>
25 #include <asterisk/ulaw.h>
26 #include <asterisk/alaw.h>
27 #include <asterisk/callerid.h>
28 #include <asterisk/adsi.h>
29 #include <asterisk/cli.h>
30 #include <asterisk/cdr.h>
31 #include <asterisk/parking.h>
32 #include <asterisk/musiconhold.h>
33 #include <asterisk/say.h>
34 #include <asterisk/tdd.h>
35 #include <asterisk/app.h>
36 #include <asterisk/dsp.h>
37 #include <asterisk/astdb.h>
38 #include <asterisk/manager.h>
39 #include <asterisk/causes.h>
40 #include <asterisk/term.h>
41 #include <asterisk/utils.h>
42 #include <sys/signal.h>
43 #include <errno.h>
44 #include <stdlib.h>
45 #include <stdint.h>
46 #include <unistd.h>
47 #include <sys/ioctl.h>
48 #ifdef __linux__
49 #include <linux/zaptel.h>
50 #else
51 #include <zaptel.h>
52 #endif /* __linux__ */
53 #include <math.h>
54 #include <tonezone.h>
55 #include <ctype.h>
56 #ifdef ZAPATA_PRI
57 #include <libpri.h>
58 #ifndef PRI_SETUP_CALL
59 #error "You need newer libpri"
60 #endif
61 #endif
62 #ifdef ZAPATA_R2
63 #include <libmfcr2.h>
64 #endif
65
66 #include "../asterisk.h"
67
68 #ifndef ZT_SIG_EM_E1
69 #error "Your zaptel is too old.  please cvs update"
70 #endif
71
72 /*
73  * Define ZHONE_HACK to cause us to go off hook and then back on hook when
74  * the user hangs up to reset the state machine so ring works properly.
75  * This is used to be able to support kewlstart by putting the zhone in
76  * groundstart mode since their forward disconnect supervision is entirely
77  * broken even though their documentation says it isn't and their support
78  * is entirely unwilling to provide any assistance with their channel banks
79  * even though their web site says they support their products for life.
80  */
81
82 /* #define ZHONE_HACK */
83
84 /* Typically, how many rings before we should send Caller*ID */
85 #define DEFAULT_CIDRINGS 1
86
87 #define CHANNEL_PSEUDO -12
88
89 #define AST_LAW(p) (((p)->law == ZT_LAW_ALAW) ? AST_FORMAT_ALAW : AST_FORMAT_ULAW)
90
91 static char *desc = "Zapata Telephony"
92 #ifdef ZAPATA_PRI
93                " w/PRI"
94 #endif
95 #ifdef ZAPATA_R2
96                " w/R2"
97 #endif
98 ;
99
100 static char *tdesc = "Zapata Telephony Driver"
101 #ifdef ZAPATA_PRI
102                " w/PRI"
103 #endif
104 #ifdef ZAPATA_R2
105                " w/R2"
106 #endif
107 ;
108
109 static char *type = "Zap";
110 static char *typecompat = "Tor";        /* Retain compatibility with chan_tor */
111 static char *config = "zapata.conf";
112
113 #define SIG_EM          ZT_SIG_EM
114 #define SIG_EMWINK      (0x100000 | ZT_SIG_EM)
115 #define SIG_FEATD       (0x200000 | ZT_SIG_EM)
116 #define SIG_FEATDMF     (0x400000 | ZT_SIG_EM)
117 #define SIG_FEATB       (0x800000 | ZT_SIG_EM)
118 #define SIG_E911        (0x1000000 | ZT_SIG_EM)
119 #define SIG_FXSLS       ZT_SIG_FXSLS
120 #define SIG_FXSGS       ZT_SIG_FXSGS
121 #define SIG_FXSKS       ZT_SIG_FXSKS
122 #define SIG_FXOLS       ZT_SIG_FXOLS
123 #define SIG_FXOGS       ZT_SIG_FXOGS
124 #define SIG_FXOKS       ZT_SIG_FXOKS
125 #define SIG_PRI         ZT_SIG_CLEAR
126 #define SIG_R2          ZT_SIG_CAS
127 #define SIG_SF          ZT_SIG_SF
128 #define SIG_SFWINK      (0x100000 | ZT_SIG_SF)
129 #define SIG_SF_FEATD    (0x200000 | ZT_SIG_SF)
130 #define SIG_SF_FEATDMF  (0x400000 | ZT_SIG_SF)
131 #define SIG_SF_FEATB    (0x800000 | ZT_SIG_SF)
132 #define SIG_EM_E1       ZT_SIG_EM_E1
133 #define SIG_GR303FXOKS   (0x100000 | ZT_SIG_FXOKS)
134
135 #define NUM_SPANS       32
136 #define NUM_DCHANS      4               /* No more than 4 d-channels */
137 #define MAX_CHANNELS    672     /* No more than a DS3 per trunk group */
138 #define RESET_INTERVAL  3600    /* How often (in seconds) to reset unused channels */
139
140 #define CHAN_PSEUDO     -2
141
142 #define DCHAN_PROVISIONED (1 << 0)
143 #define DCHAN_NOTINALARM  (1 << 1)
144 #define DCHAN_UP          (1 << 2)
145
146 #define DCHAN_AVAILABLE (DCHAN_PROVISIONED | DCHAN_NOTINALARM | DCHAN_UP)
147
148 static char context[AST_MAX_EXTENSION] = "default";
149 static char callerid[256] = "";
150
151 static char language[MAX_LANGUAGE] = "";
152 static char musicclass[MAX_LANGUAGE] = "";
153 static char progzone[10]= "";
154
155 static int usedistinctiveringdetection = 0;
156
157 static int use_callerid = 1;
158 static int zaptrcallerid = 0;
159 static int cur_signalling = -1;
160
161 static unsigned int cur_group = 0;
162 static unsigned int cur_callergroup = 0;
163 static unsigned int cur_pickupgroup = 0;
164 static int relaxdtmf = 0;
165
166 static int immediate = 0;
167
168 static int stripmsd = 0;
169
170 static int callwaiting = 0;
171
172 static int callwaitingcallerid = 0;
173
174 static int hidecallerid = 0;
175
176 static int restrictcid = 0;
177
178 static int use_callingpres = 0;
179
180 static int callreturn = 0;
181
182 static int threewaycalling = 0;
183
184 static int transfer = 0;
185
186 static int cancallforward = 0;
187
188 static float rxgain = 0.0;
189
190 static float txgain = 0.0;
191
192 static int tonezone = -1;
193
194 static int echocancel;
195
196 static int echotraining;
197
198 static int echocanbridged = 0;
199
200 static int busydetect = 0;
201
202 static int busycount = 3;
203
204 static int callprogress = 0;
205
206 static char accountcode[20] = "";
207
208 static char mailbox[AST_MAX_EXTENSION];
209
210 static int amaflags = 0;
211
212 static int adsi = 0;
213
214 static int numbufs = 4;
215
216 static int cur_prewink = -1;
217 static int cur_preflash = -1;
218 static int cur_wink = -1;
219 static int cur_flash = -1;
220 static int cur_start = -1;
221 static int cur_rxwink = -1;
222 static int cur_rxflash = -1;
223 static int cur_debounce = -1;
224
225 #ifdef ZAPATA_PRI
226 static int minunused = 2;
227 static int minidle = 0;
228 static char idleext[AST_MAX_EXTENSION];
229 static char idledial[AST_MAX_EXTENSION];
230 static int overlapdial = 0;
231 static struct ast_channel inuse = { "GR-303InUse" };
232 #endif
233
234 /* Wait up to 16 seconds for first digit (FXO logic) */
235 static int firstdigittimeout = 16000;
236
237 /* How long to wait for following digits (FXO logic) */
238 static int gendigittimeout = 8000;
239
240 /* How long to wait for an extra digit, if there is an ambiguous match */
241 static int matchdigittimeout = 3000;
242
243 static int usecnt =0;
244 AST_MUTEX_DEFINE_STATIC(usecnt_lock);
245
246 /* Protect the interface list (of zt_pvt's) */
247 AST_MUTEX_DEFINE_STATIC(iflock);
248
249 static int ifcount = 0;
250
251 /* Protect the monitoring thread, so only one process can kill or start it, and not
252    when it's doing something critical. */
253 AST_MUTEX_DEFINE_STATIC(monlock);
254
255 /* This is the thread for the monitor which checks for input on the channels
256    which are not currently in use.  */
257 static pthread_t monitor_thread = AST_PTHREADT_NULL;
258
259 static int restart_monitor(void);
260
261 static int zt_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc);
262
263 static int zt_sendtext(struct ast_channel *c, char *text);
264
265 static inline int zt_get_event(int fd)
266 {
267         /* Avoid the silly zt_getevent which ignores a bunch of events */
268         int j;
269         if (ioctl(fd, ZT_GETEVENT, &j) == -1) return -1;
270         return j;
271 }
272
273 static inline int zt_wait_event(int fd)
274 {
275         /* Avoid the silly zt_waitevent which ignores a bunch of events */
276         int i,j=0;
277         i = ZT_IOMUX_SIGEVENT;
278         if (ioctl(fd, ZT_IOMUX, &i) == -1) return -1;
279         if (ioctl(fd, ZT_GETEVENT, &j) == -1) return -1;
280         return j;
281 }
282
283 /* Chunk size to read -- we use 20ms chunks to make things happy.  */   
284 #define READ_SIZE 160
285
286 #define MASK_AVAIL              (1 << 0)                /* Channel available for PRI use */
287 #define MASK_INUSE              (1 << 1)                /* Channel currently in use */
288
289 #define CALLWAITING_SILENT_SAMPLES      ( (300 * 8) / READ_SIZE) /* 300 ms */
290 #define CALLWAITING_REPEAT_SAMPLES      ( (10000 * 8) / READ_SIZE) /* 300 ms */
291 #define CIDCW_EXPIRE_SAMPLES            ( (500 * 8) / READ_SIZE) /* 500 ms */
292 #define MIN_MS_SINCE_FLASH                      ( (2000) )      /* 2000 ms */
293 #define RINGT                                           ( (8000 * 8) / READ_SIZE)
294
295 struct zt_pvt;
296
297
298 #ifdef ZAPATA_R2
299 static int r2prot = -1;
300 #endif
301
302
303 #ifdef ZAPATA_PRI
304
305 #define PVT_TO_CHANNEL(p) (((p)->prioffset) | ((p)->logicalspan << 8))
306 #define PRI_CHANNEL(p) ((p) & 0xff)
307 #define PRI_SPAN(p) (((p) >> 8) & 0xff)
308
309 struct zt_pri {
310         pthread_t master;                       /* Thread of master */
311         ast_mutex_t lock;               /* Mutex */
312         char idleext[AST_MAX_EXTENSION];                /* Where to idle extra calls */
313         char idlecontext[AST_MAX_EXTENSION];            /* What context to use for idle */
314         char idledial[AST_MAX_EXTENSION];               /* What to dial before dumping */
315         int minunused;                          /* Min # of channels to keep empty */
316         int minidle;                            /* Min # of "idling" calls to keep active */
317         int nodetype;                           /* Node type */
318         int switchtype;                         /* Type of switch to emulate */
319         int dialplan;                   /* Dialing plan */
320         int dchannels[NUM_DCHANS];      /* What channel are the dchannels on */
321         int trunkgroup;                 /* What our trunkgroup is */
322         int mastertrunkgroup;   /* What trunk group is our master */
323         int prilogicalspan;             /* Logical span number within trunk group */
324         int numchans;                   /* Num of channels we represent */
325         int overlapdial;                /* In overlap dialing mode */
326         struct pri *dchans[NUM_DCHANS]; /* Actual d-channels */
327         int dchanavail[NUM_DCHANS];             /* Whether each channel is available */
328         struct pri *pri;                                /* Currently active D-channel */
329         int debug;
330         int fds[NUM_DCHANS];    /* FD's for d-channels */
331         int offset;
332         int span;
333         int resetting;
334         int resetpos;
335         time_t lastreset;
336         struct zt_pvt *pvts[MAX_CHANNELS];      /* Member channel pvt structs */
337         struct zt_pvt *crvs;                            /* Member CRV structs */
338         struct zt_pvt *crvend;                          /* Pointer to end of CRV structs */
339 };
340
341
342 static struct zt_pri pris[NUM_SPANS];
343
344 static int pritype = PRI_CPE;
345
346 #if 0
347 #define DEFAULT_PRI_DEBUG (PRI_DEBUG_Q931_DUMP | PRI_DEBUG_Q921_DUMP | PRI_DEBUG_Q921_RAW | PRI_DEBUG_Q921_STATE)
348 #else
349 #define DEFAULT_PRI_DEBUG 0
350 #endif
351
352 static inline void pri_rel(struct zt_pri *pri)
353 {
354         ast_mutex_unlock(&pri->lock);
355 }
356
357 static int switchtype = PRI_SWITCH_NI2;
358 static int dialplan = PRI_NATIONAL_ISDN + 1;
359
360 #else
361 /* Shut up the compiler */
362 struct zt_pri;
363 #endif
364
365 #define SUB_REAL                0                       /* Active call */
366 #define SUB_CALLWAIT    1                       /* Call-Waiting call on hold */
367 #define SUB_THREEWAY    2                       /* Three-way call */
368
369
370 static struct zt_distRings drings;
371
372 struct distRingData {
373         int ring[3];
374 };
375 struct ringContextData {
376         char contextData[AST_MAX_EXTENSION];
377 };
378 struct zt_distRings {
379         struct distRingData ringnum[3];
380         struct ringContextData ringContext[3];
381 };
382
383 static char *subnames[] = {
384         "Real",
385         "Callwait",
386         "Threeway"
387 };
388
389 struct zt_subchannel {
390         int zfd;
391         struct ast_channel *owner;
392         int chan;
393         short buffer[AST_FRIENDLY_OFFSET/2 + READ_SIZE];
394         struct ast_frame f;             /* One frame for each channel.  How did this ever work before? */
395         int needringing;
396         int needbusy;
397         int needcongestion;
398         int needcallerid;
399         int needanswer;
400         int linear;
401         int inthreeway;
402         ZT_CONFINFO curconf;
403 };
404
405 #define CONF_USER_REAL          (1 << 0)
406 #define CONF_USER_THIRDCALL     (1 << 1)
407
408 #define MAX_SLAVES      4
409
410 static struct zt_pvt {
411         ast_mutex_t lock;
412         struct ast_channel *owner;      /* Our current active owner (if applicable) */
413                 /* Up to three channels can be associated with this call */
414                 
415         struct zt_subchannel sub_unused;        /* Just a safety precaution */
416         struct zt_subchannel subs[3];   /* Sub-channels */
417         struct zt_confinfo saveconf;    /* Saved conference info */
418
419         struct zt_pvt *slaves[MAX_SLAVES];      /* Slave to us (follows our conferencing) */
420         struct zt_pvt *master;  /* Master to us (we follow their conferencing) */
421         int inconference;               /* If our real should be in the conference */
422         
423         int sig;                                        /* Signalling style */
424         int radio;                              /* radio type */
425         int firstradio;                         /* first radio flag */
426         float rxgain;
427         float txgain;
428         int tonezone;                           /* tone zone for this chan, or -1 for default */
429         struct zt_pvt *next;                    /* Next channel in list */
430         struct zt_pvt *prev;                    /* Prev channel in list */
431
432         struct zt_distRings drings;
433         int usedistinctiveringdetection;
434
435         char context[AST_MAX_EXTENSION];
436         char defcontext[AST_MAX_EXTENSION];
437         char exten[AST_MAX_EXTENSION];
438         char language[MAX_LANGUAGE];
439         char musicclass[MAX_LANGUAGE];
440         char callerid[AST_MAX_EXTENSION];
441         char lastcallerid[AST_MAX_EXTENSION];
442         char *origcallerid;                     /* malloced original callerid */
443         char callwaitcid[AST_MAX_EXTENSION];
444         char rdnis[AST_MAX_EXTENSION];
445         char dnid[AST_MAX_EXTENSION];
446         unsigned int group;
447         int law;
448         int confno;                                     /* Our conference */
449         int confusers;                          /* Who is using our conference */
450         int propconfno;                         /* Propagated conference number */
451         unsigned int callgroup;
452         unsigned int pickupgroup;
453         int immediate;                          /* Answer before getting digits? */
454         int channel;                            /* Channel Number or CRV */
455         int span;                                       /* Span number */
456         int dialing;
457         time_t guardtime;                       /* Must wait this much time before using for new call */
458         int dialednone;
459         int use_callerid;                       /* Whether or not to use caller id on this channel */
460         int hidecallerid;
461         int callreturn;
462         int permhidecallerid;           /* Whether to hide our outgoing caller ID or not */
463         int restrictcid;                /* Whether restrict the callerid -> only send ANI */
464         int use_callingpres;            /* Whether to use the callingpres the calling switch sends */
465         int callingpres;                /* The value of callling presentation that we're going to use when placing a PRI call */
466         int callwaitingrepeat;          /* How many samples to wait before repeating call waiting */
467         int cidcwexpire;                        /* When to expire our muting for CID/CW */
468         unsigned char *cidspill;
469         int cidpos;
470         int cidlen;
471         int ringt;
472         int stripmsd;
473         int callwaiting;
474         int callwaitcas;
475         int callwaitrings;
476         int echocancel;
477         int echotraining;
478         int echocanbridged;
479         int echocanon;
480         int echobreak;
481         char echorest[10];
482         int permcallwaiting;
483         int callwaitingcallerid;
484         int threewaycalling;
485         int transfer;
486         int digital;
487         int outgoing;
488         int dnd;
489         int busydetect;
490         int busycount;
491         int callprogress;
492         struct timeval flashtime;       /* Last flash-hook time */
493         struct ast_dsp *dsp;
494         int cref;                                       /* Call reference number */
495         ZT_DIAL_OPERATION dop;
496         int destroy;
497         int ignoredtmf;                         
498         int inalarm;
499         char accountcode[20];           /* Account code */
500         int amaflags;                           /* AMA Flags */
501         char didtdd;                    /* flag to say its done it once */
502         struct tdd_state *tdd;          /* TDD flag */
503         int adsi;
504         int cancallforward;
505         char call_forward[AST_MAX_EXTENSION];
506         char mailbox[AST_MAX_EXTENSION];
507         char dialdest[256];
508         int onhooktime;
509         int msgstate;
510         
511         int confirmanswer;              /* Wait for '#' to confirm answer */
512         int distinctivering;    /* Which distinctivering to use */
513         int cidrings;                   /* Which ring to deliver CID on */
514         
515         int faxhandled;                 /* Has a fax tone already been handled? */
516         
517         char mate;                      /* flag to say its in MATE mode */
518         int pulsedial;          /* whether a pulse dial phone is detected */
519         int dtmfrelax;          /* whether to run in relaxed DTMF mode */
520         int fake_event;
521         int zaptrcallerid;      /* should we use the callerid from incoming call on zap transfer or not */
522 #ifdef ZAPATA_PRI
523         struct zt_pri *pri;
524         struct zt_pvt *bearer;
525         struct zt_pvt *realcall;
526         q931_call *call;
527         int isidlecall;
528         int resetting;
529         int prioffset;
530         int logicalspan;
531         int alreadyhungup;
532         int proceeding;
533         int setup_ack;          /* wheter we received SETUP_ACKNOWLEDGE or not */
534 #endif  
535 #ifdef ZAPATA_R2
536         int r2prot;
537         mfcr2_t *r2;
538         int hasr2call;
539         int r2blocked;
540         int sigchecked;
541 #endif  
542 } *iflist = NULL, *ifend = NULL;
543
544 struct zt_pvt *round_robin[32];
545
546 #ifdef ZAPATA_PRI
547 static inline int pri_grab(struct zt_pvt *pvt, struct zt_pri *pri)
548 {
549         int res;
550         /* Grab the lock first */
551         do {
552             res = ast_mutex_trylock(&pri->lock);
553                 if (res) {
554                         ast_mutex_unlock(&pvt->lock);
555                         /* Release the lock and try again */
556                         usleep(1);
557                         ast_mutex_lock(&pvt->lock);
558                 }
559         } while(res);
560         /* Then break the poll */
561         pthread_kill(pri->master, SIGURG);
562         return 0;
563 }
564 #endif
565
566 #define NUM_CADENCE_MAX 25
567 static int num_cadence = 4;
568 static int user_has_defined_cadences = 0;
569
570 static struct zt_ring_cadence cadences[NUM_CADENCE_MAX] = {
571         { { 125, 125, 2000, 4000 } },                   /* Quick chirp followed by normal ring */
572         { { 250, 250, 500, 1000, 250, 250, 500, 4000 } }, /* British style ring */
573         { { 125, 125, 125, 125, 125, 4000 } },  /* Three short bursts */
574         { { 1000, 500, 2500, 5000 } },  /* Long ring */
575 };
576
577 int receivedRingT; /* Used to find out what ringtone we are on */
578
579 /* cidrings says in which pause to transmit the cid information, where the first pause
580  * is 1, the second pause is 2 and so on.
581  */
582
583 static int cidrings[NUM_CADENCE_MAX] = {
584         2,                                                                              /* Right after first long ring */
585         4,                                                                              /* Right after long part */
586         3,                                                                              /* After third chirp */
587         2,                                                                              /* Second spell */
588 };
589
590 #define ISTRUNK(p) ((p->sig == SIG_FXSLS) || (p->sig == SIG_FXSKS) || \
591                         (p->sig == SIG_FXSGS) || (p->sig == SIG_PRI))
592
593 #define CANBUSYDETECT(p) (ISTRUNK(p) || (p->sig & (SIG_EM | SIG_EM_E1 | SIG_SF)) /* || (p->sig & __ZT_SIG_FXO) */)
594 #define CANPROGRESSDETECT(p) (ISTRUNK(p) || (p->sig & (SIG_EM | SIG_EM_E1 | SIG_SF)) /* || (p->sig & __ZT_SIG_FXO) */)
595
596 #ifdef ZAPATA_PRI
597 /* translate between PRI causes and asterisk's */
598 static int hangup_pri2cause(int cause)
599 {
600         switch(cause) {
601                 case PRI_CAUSE_USER_BUSY:
602                         return AST_CAUSE_BUSY;
603                 case PRI_CAUSE_NORMAL_CLEARING:
604                         return AST_CAUSE_NORMAL;
605                 case PRI_CAUSE_NORMAL_CIRCUIT_CONGESTION:
606                 case PRI_CAUSE_REQUESTED_CHAN_UNAVAIL:
607                         return AST_CAUSE_CONGESTION;
608                 case PRI_CAUSE_UNALLOCATED:
609                 case PRI_CAUSE_NUMBER_CHANGED:
610                         return AST_CAUSE_UNALLOCATED;
611                 default:
612                         return AST_CAUSE_FAILURE;
613         }
614         /* never reached */
615         return 0;
616 }
617
618 /* translate between ast cause and PRI */
619 static int hangup_cause2pri(int cause)
620 {
621         switch(cause) {
622                 case AST_CAUSE_BUSY:
623                         return PRI_CAUSE_USER_BUSY;
624                 case AST_CAUSE_UNALLOCATED:
625                         return PRI_CAUSE_UNALLOCATED;
626                 case AST_CAUSE_CONGESTION:
627                         return PRI_CAUSE_NORMAL_CIRCUIT_CONGESTION;
628                 case AST_CAUSE_NORMAL:
629                 default:
630                         return PRI_CAUSE_NORMAL_CLEARING;
631         }
632         /* never reached */
633         return 0;
634 }
635 #endif
636
637 static int zt_get_index(struct ast_channel *ast, struct zt_pvt *p, int nullok)
638 {
639         int res;
640         if (p->subs[0].owner == ast)
641                 res = 0;
642         else if (p->subs[1].owner == ast)
643                 res = 1;
644         else if (p->subs[2].owner == ast)
645                 res = 2;
646         else {
647                 res = -1;
648                 if (!nullok)
649                         ast_log(LOG_WARNING, "Unable to get index, and nullok is not asserted\n");
650         }
651         return res;
652 }
653
654 static void wakeup_sub(struct zt_pvt *p, int a)
655 {
656         struct ast_frame null = { AST_FRAME_NULL, };
657         for (;;) {
658                 if (p->subs[a].owner) {
659                         if (ast_mutex_trylock(&p->subs[a].owner->lock)) {
660                                 ast_mutex_unlock(&p->lock);
661                                 usleep(1);
662                                 ast_mutex_lock(&p->lock);
663                         } else {
664                                 ast_queue_frame(p->subs[a].owner, &null);
665                                 ast_mutex_unlock(&p->subs[a].owner->lock);
666                                 break;
667                         }
668                 } else
669                         break;
670         }
671 }
672
673 static void zap_queue_frame(struct zt_pvt *p, struct ast_frame *f)
674 {
675         for (;;) {
676                 if (p->owner) {
677                         if (ast_mutex_trylock(&p->owner->lock)) {
678                                 ast_mutex_unlock(&p->lock);
679                                 usleep(1);
680                                 ast_mutex_lock(&p->lock);
681                         } else {
682                                 ast_queue_frame(p->owner, f);
683                                 ast_mutex_unlock(&p->owner->lock);
684                                 break;
685                         }
686                 } else
687                         break;
688         }
689 }
690
691 static void swap_subs(struct zt_pvt *p, int a, int b)
692 {
693         int tchan;
694         int tinthreeway;
695         struct ast_channel *towner;
696
697         ast_log(LOG_DEBUG, "Swapping %d and %d\n", a, b);
698
699         tchan = p->subs[a].chan;
700         towner = p->subs[a].owner;
701         tinthreeway = p->subs[a].inthreeway;
702
703         p->subs[a].chan = p->subs[b].chan;
704         p->subs[a].owner = p->subs[b].owner;
705         p->subs[a].inthreeway = p->subs[b].inthreeway;
706
707         p->subs[b].chan = tchan;
708         p->subs[b].owner = towner;
709         p->subs[b].inthreeway = tinthreeway;
710
711         if (p->subs[a].owner) 
712                 p->subs[a].owner->fds[0] = p->subs[a].zfd;
713         if (p->subs[b].owner) 
714                 p->subs[b].owner->fds[0] = p->subs[b].zfd;
715         wakeup_sub(p, a);
716         wakeup_sub(p, b);
717 }
718
719 static int zt_open(char *fn)
720 {
721         int fd;
722         int isnum;
723         int chan = 0;
724         int bs;
725         int x;
726         isnum = 1;
727         for (x=0;x<strlen(fn);x++) {
728                 if (!isdigit(fn[x])) {
729                         isnum = 0;
730                         break;
731                 }
732         }
733         if (isnum) {
734                 chan = atoi(fn);
735                 if (chan < 1) {
736                         ast_log(LOG_WARNING, "Invalid channel number '%s'\n", fn);
737                         return -1;
738                 }
739                 fn = "/dev/zap/channel";
740         }
741         fd = open(fn, O_RDWR | O_NONBLOCK);
742         if (fd < 0) {
743                 ast_log(LOG_WARNING, "Unable to open '%s': %s\n", fn, strerror(errno));
744                 return -1;
745         }
746         if (chan) {
747                 if (ioctl(fd, ZT_SPECIFY, &chan)) {
748                         x = errno;
749                         close(fd);
750                         errno = x;
751                         ast_log(LOG_WARNING, "Unable to specify channel %d: %s\n", chan, strerror(errno));
752                         return -1;
753                 }
754         }
755         bs = READ_SIZE;
756         if (ioctl(fd, ZT_SET_BLOCKSIZE, &bs) == -1) return -1;
757         return fd;
758 }
759
760 static void zt_close(int fd)
761 {
762         close(fd);
763 }
764
765 int zt_setlinear(int zfd, int linear)
766 {
767         int res;
768         res = ioctl(zfd, ZT_SETLINEAR, &linear);
769         if (res)
770                 return res;
771         return 0;
772 }
773
774
775 int zt_setlaw(int zfd, int law)
776 {
777         int res;
778         res = ioctl(zfd, ZT_SETLAW, &law);
779         if (res)
780                 return res;
781         return 0;
782 }
783
784 static int alloc_sub(struct zt_pvt *p, int x)
785 {
786         ZT_BUFFERINFO bi;
787         int res;
788         if (p->subs[x].zfd < 0) {
789                 p->subs[x].zfd = zt_open("/dev/zap/pseudo");
790                 if (p->subs[x].zfd > -1) {
791                         res = ioctl(p->subs[x].zfd, ZT_GET_BUFINFO, &bi);
792                         if (!res) {
793                                 bi.txbufpolicy = ZT_POLICY_IMMEDIATE;
794                                 bi.rxbufpolicy = ZT_POLICY_IMMEDIATE;
795                                 bi.numbufs = numbufs;
796                                 res = ioctl(p->subs[x].zfd, ZT_SET_BUFINFO, &bi);
797                                 if (res < 0) {
798                                         ast_log(LOG_WARNING, "Unable to set buffer policy on channel %d\n", x);
799                                 }
800                         } else 
801                                 ast_log(LOG_WARNING, "Unable to check buffer policy on channel %d\n", x);
802                         if (ioctl(p->subs[x].zfd, ZT_CHANNO, &p->subs[x].chan) == 1) {
803                                 ast_log(LOG_WARNING,"Unable to get channel number for pseudo channel on FD %d\n",p->subs[x].zfd);
804                                 zt_close(p->subs[x].zfd);
805                                 p->subs[x].zfd = -1;
806                                 return -1;
807                         }
808                         if (option_debug)
809                                 ast_log(LOG_DEBUG, "Allocated %s subchannel on FD %d channel %d\n", subnames[x], p->subs[x].zfd, p->subs[x].chan);
810                         return 0;
811                 } else
812                         ast_log(LOG_WARNING, "Unable to open pseudo channel: %s\n", strerror(errno));
813                 return -1;
814         }
815         ast_log(LOG_WARNING, "%s subchannel of %d already in use\n", subnames[x], p->channel);
816         return -1;
817 }
818
819 static int unalloc_sub(struct zt_pvt *p, int x)
820 {
821         if (!x) {
822                 ast_log(LOG_WARNING, "Trying to unalloc the real channel %d?!?\n", p->channel);
823                 return -1;
824         }
825         ast_log(LOG_DEBUG, "Released sub %d of channel %d\n", x, p->channel);
826         if (p->subs[x].zfd > -1) {
827                 zt_close(p->subs[x].zfd);
828         }
829         p->subs[x].zfd = -1;
830         p->subs[x].linear = 0;
831         p->subs[x].chan = 0;
832         p->subs[x].owner = NULL;
833         p->subs[x].inthreeway = 0;
834         memset(&p->subs[x].curconf, 0, sizeof(p->subs[x].curconf));
835         return 0;
836 }
837
838 static int zt_digit(struct ast_channel *ast, char digit)
839 {
840         ZT_DIAL_OPERATION zo;
841         struct zt_pvt *p;
842         int res = 0;
843         int index;
844         p = ast->pvt->pvt;
845         index = zt_get_index(ast, p, 0);
846         if (index == SUB_REAL) {
847 #ifdef ZAPATA_PRI
848                 if (p->sig == SIG_PRI && ast->_state == AST_STATE_DIALING && p->setup_ack && (p->proceeding < 2)) {
849                         if (!pri_grab(p, p->pri)) {
850                                 pri_information(p->pri->pri,p->call,digit);
851                                 pri_rel(p->pri);
852                         } else
853                                 ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
854                 } else {
855 #else
856                 {
857 #endif
858                         zo.op = ZT_DIAL_OP_APPEND;
859                         zo.dialstr[0] = 'T';
860                         zo.dialstr[1] = digit;
861                         zo.dialstr[2] = 0;
862                         if ((res = ioctl(p->subs[SUB_REAL].zfd, ZT_DIAL, &zo)))
863                                 ast_log(LOG_WARNING, "Couldn't dial digit %c\n", digit);
864                         else
865                                 p->dialing = 1;
866                 }
867         }
868         
869         return res;
870 }
871
872 static char *events[] = {
873         "No event",
874         "On hook",
875         "Ring/Answered",
876         "Wink/Flash",
877         "Alarm",
878         "No more alarm",
879                 "HDLC Abort",
880                 "HDLC Overrun",
881                 "HDLC Bad FCS",
882                 "Dial Complete",
883                 "Ringer On",
884                 "Ringer Off",
885                 "Hook Transition Complete",
886                 "Bits Changed",
887                 "Pulse Start"
888 };
889
890 static struct {
891         int alarm;
892         char *name;
893 } alarms[] = {
894         { ZT_ALARM_RED, "Red Alarm" },
895         { ZT_ALARM_YELLOW, "Yellow Alarm" },
896         { ZT_ALARM_BLUE, "Blue Alarm" },
897         { ZT_ALARM_RECOVER, "Recovering" },
898         { ZT_ALARM_LOOPBACK, "Loopback" },
899         { ZT_ALARM_NOTOPEN, "Not Open" },
900         { ZT_ALARM_NONE, "None" },
901 };
902
903 static char *alarm2str(int alarm)
904 {
905         int x;
906         for (x=0;x<sizeof(alarms) / sizeof(alarms[0]); x++) {
907                 if (alarms[x].alarm & alarm)
908                         return alarms[x].name;
909         }
910         return alarm ? "Unknown Alarm" : "No Alarm";
911 }
912
913 static char *event2str(int event)
914 {
915         static char buf[256];
916         if ((event < 15) && (event > -1))
917                 return events[event];
918         sprintf(buf, "Event %d", event);
919         return buf;
920 }
921
922 #ifdef ZAPATA_R2
923 static int str2r2prot(char *swtype)
924 {
925     if (!strcasecmp(swtype, "ar"))
926         return MFCR2_PROT_ARGENTINA;
927     /*endif*/
928     if (!strcasecmp(swtype, "cn"))
929         return MFCR2_PROT_CHINA;
930     /*endif*/
931     if (!strcasecmp(swtype, "kr"))
932         return MFCR2_PROT_KOREA;
933     /*endif*/
934     return -1;
935 }
936 #endif
937
938 static char *sig2str(int sig)
939 {
940         static char buf[256];
941         switch(sig) {
942         case SIG_EM:
943                 return "E & M Immediate";
944         case SIG_EMWINK:
945                 return "E & M Wink";
946         case SIG_EM_E1:
947                 return "E & M E1";
948         case SIG_FEATD:
949                 return "Feature Group D (DTMF)";
950         case SIG_FEATDMF:
951                 return "Feature Group D (MF)";
952         case SIG_FEATB:
953                 return "Feature Group B (MF)";
954         case SIG_E911:
955                 return "E911 (MF)";
956         case SIG_FXSLS:
957                 return "FXS Loopstart";
958         case SIG_FXSGS:
959                 return "FXS Groundstart";
960         case SIG_FXSKS:
961                 return "FXS Kewlstart";
962         case SIG_FXOLS:
963                 return "FXO Loopstart";
964         case SIG_FXOGS:
965                 return "FXO Groundstart";
966         case SIG_FXOKS:
967                 return "FXO Kewlstart";
968         case SIG_PRI:
969                 return "PRI Signalling";
970         case SIG_R2:
971                 return "R2 Signalling";
972         case SIG_SF:
973                 return "SF (Tone) Signalling Immediate";
974         case SIG_SFWINK:
975                 return "SF (Tone) Signalling Wink";
976         case SIG_SF_FEATD:
977                 return "SF (Tone) Signalling with Feature Group D (DTMF)";
978         case SIG_SF_FEATDMF:
979                 return "SF (Tone) Signalling with Feature Group D (MF)";
980         case SIG_SF_FEATB:
981                 return "SF (Tone) Signalling with Feature Group B (MF)";
982         case SIG_GR303FXOKS:
983                 return "GR-303 Signalling with FXOKS";
984         case 0:
985                 return "Pseudo Signalling";
986         default:
987                 snprintf(buf, sizeof(buf), "Unknown signalling %d", sig);
988                 return buf;
989         }
990 }
991
992 static int conf_add(struct zt_pvt *p, struct zt_subchannel *c, int index, int slavechannel)
993 {
994         /* If the conference already exists, and we're already in it
995            don't bother doing anything */
996         ZT_CONFINFO zi;
997         
998         memset(&zi, 0, sizeof(zi));
999         zi.chan = 0;
1000
1001         if (slavechannel > 0) {
1002                 /* If we have only one slave, do a digital mon */
1003                 zi.confmode = ZT_CONF_DIGITALMON;
1004                 zi.confno = slavechannel;
1005         } else {
1006                 if (!index) {
1007                         /* Real-side and pseudo-side both participate in conference */
1008                         zi.confmode = ZT_CONF_REALANDPSEUDO | ZT_CONF_TALKER | ZT_CONF_LISTENER |
1009                                                                 ZT_CONF_PSEUDO_TALKER | ZT_CONF_PSEUDO_LISTENER;
1010                 } else
1011                         zi.confmode = ZT_CONF_CONF | ZT_CONF_TALKER | ZT_CONF_LISTENER;
1012                 zi.confno = p->confno;
1013         }
1014         if ((zi.confno == c->curconf.confno) && (zi.confmode == c->curconf.confmode))
1015                 return 0;
1016         if (c->zfd < 0)
1017                 return 0;
1018         if (ioctl(c->zfd, ZT_SETCONF, &zi)) {
1019                 ast_log(LOG_WARNING, "Failed to add %d to conference %d/%d\n", c->zfd, zi.confmode, zi.confno);
1020                 return -1;
1021         }
1022         if (slavechannel < 1) {
1023                 p->confno = zi.confno;
1024         }
1025         memcpy(&c->curconf, &zi, sizeof(c->curconf));
1026         ast_log(LOG_DEBUG, "Added %d to conference %d/%d\n", c->zfd, c->curconf.confmode, c->curconf.confno);
1027         return 0;
1028 }
1029
1030 static int isourconf(struct zt_pvt *p, struct zt_subchannel *c)
1031 {
1032         /* If they're listening to our channel, they're ours */ 
1033         if ((p->channel == c->curconf.confno) && (c->curconf.confmode == ZT_CONF_DIGITALMON))
1034                 return 1;
1035         /* If they're a talker on our (allocated) conference, they're ours */
1036         if ((p->confno > 0) && (p->confno == c->curconf.confno) && (c->curconf.confmode & ZT_CONF_TALKER))
1037                 return 1;
1038         return 0;
1039 }
1040
1041 static int conf_del(struct zt_pvt *p, struct zt_subchannel *c, int index)
1042 {
1043         ZT_CONFINFO zi;
1044         if (/* Can't delete if there's no zfd */
1045                 (c->zfd < 0) ||
1046                 /* Don't delete from the conference if it's not our conference */
1047                 !isourconf(p, c)
1048                 /* Don't delete if we don't think it's conferenced at all (implied) */
1049                 ) return 0;
1050         memset(&zi, 0, sizeof(zi));
1051         zi.chan = 0;
1052         zi.confno = 0;
1053         zi.confmode = 0;
1054         if (ioctl(c->zfd, ZT_SETCONF, &zi)) {
1055                 ast_log(LOG_WARNING, "Failed to drop %d from conference %d/%d\n", c->zfd, c->curconf.confmode, c->curconf.confno);
1056                 return -1;
1057         }
1058         ast_log(LOG_DEBUG, "Removed %d from conference %d/%d\n", c->zfd, c->curconf.confmode, c->curconf.confno);
1059         memcpy(&c->curconf, &zi, sizeof(c->curconf));
1060         return 0;
1061 }
1062
1063 static int isslavenative(struct zt_pvt *p, struct zt_pvt **out)
1064 {
1065         int x;
1066         int useslavenative;
1067         struct zt_pvt *slave = NULL;
1068         /* Start out optimistic */
1069         useslavenative = 1;
1070         /* Update conference state in a stateless fashion */
1071         for (x=0;x<3;x++) {
1072                 /* Any three-way calling makes slave native mode *definitely* out
1073                    of the question */
1074                 if ((p->subs[x].zfd > -1) && p->subs[x].inthreeway)
1075                         useslavenative = 0;
1076         }
1077         /* If we don't have any 3-way calls, check to see if we have
1078            precisely one slave */
1079         if (useslavenative) {
1080                 for (x=0;x<MAX_SLAVES;x++) {
1081                         if (p->slaves[x]) {
1082                                 if (slave) {
1083                                         /* Whoops already have a slave!  No 
1084                                            slave native and stop right away */
1085                                         slave = NULL;
1086                                         useslavenative = 0;
1087                                         break;
1088                                 } else {
1089                                         /* We have one slave so far */
1090                                         slave = p->slaves[x];
1091                                 }
1092                         }
1093                 }
1094         }
1095         /* If no slave, slave native definitely out */
1096         if (!slave)
1097                 useslavenative = 0;
1098         else if (slave->law != p->law) {
1099                 useslavenative = 0;
1100                 slave = NULL;
1101         }
1102         if (out)
1103                 *out = slave;
1104         return useslavenative;
1105 }
1106
1107 static int update_conf(struct zt_pvt *p)
1108 {
1109         int needconf = 0;
1110         int x;
1111         int useslavenative;
1112         struct zt_pvt *slave = NULL;
1113
1114         useslavenative = isslavenative(p, &slave);
1115         /* Start with the obvious, general stuff */
1116         for (x=0;x<3;x++) {
1117                 /* Look for three way calls */
1118                 if ((p->subs[x].zfd > -1) && p->subs[x].inthreeway) {
1119                         conf_add(p, &p->subs[x], x, 0);
1120                         needconf++;
1121                 } else {
1122                         conf_del(p, &p->subs[x], x);
1123                 }
1124         }
1125         /* If we have a slave, add him to our conference now. or DAX
1126            if this is slave native */
1127         for (x=0;x<MAX_SLAVES;x++) {
1128                 if (p->slaves[x]) {
1129                         if (useslavenative)
1130                                 conf_add(p, &p->slaves[x]->subs[SUB_REAL], SUB_REAL, p->channel);
1131                         else {
1132                                 conf_add(p, &p->slaves[x]->subs[SUB_REAL], SUB_REAL, 0);
1133                                 needconf++;
1134                         }
1135                 }
1136         }
1137         /* If we're supposed to be in there, do so now */
1138         if (p->inconference && !p->subs[SUB_REAL].inthreeway) {
1139                 if (useslavenative)
1140                         conf_add(p, &p->subs[SUB_REAL], SUB_REAL, slave->channel);
1141                 else {
1142                         conf_add(p, &p->subs[SUB_REAL], SUB_REAL, 0);
1143                         needconf++;
1144                 }
1145         }
1146         /* If we have a master, add ourselves to his conference */
1147         if (p->master) {
1148                 if (isslavenative(p->master, NULL)) {
1149                         conf_add(p->master, &p->subs[SUB_REAL], SUB_REAL, p->master->channel);
1150                 } else {
1151                         conf_add(p->master, &p->subs[SUB_REAL], SUB_REAL, 0);
1152                 }
1153         }
1154         if (!needconf) {
1155                 /* Nobody is left (or should be left) in our conference.  
1156                    Kill it.  */
1157                 p->confno = -1;
1158         }
1159         ast_log(LOG_DEBUG, "Updated conferencing on %d, with %d conference users\n", p->channel, needconf);
1160         return 0;
1161 }
1162
1163 static void zt_enable_ec(struct zt_pvt *p)
1164 {
1165         int x;
1166         int res;
1167         if (p->echocanon) {
1168                 ast_log(LOG_DEBUG, "Echo cancellation already on\n");
1169                 return;
1170         }
1171         if (p && p->echocancel) {
1172                 if (p->sig == SIG_PRI) {
1173                         x = 1;
1174                         res = ioctl(p->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &x);
1175                         if (res)
1176                                 ast_log(LOG_WARNING, "Unable to enable echo cancellation on channel %d\n", p->channel);
1177                 }
1178                 x = p->echocancel;
1179                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_ECHOCANCEL, &x);
1180                 if (res) 
1181                         ast_log(LOG_WARNING, "Unable to enable echo cancellation on channel %d\n", p->channel);
1182                 else {
1183                         p->echocanon = 1;
1184                         ast_log(LOG_DEBUG, "Enabled echo cancellation on channel %d\n", p->channel);
1185                 }
1186         } else
1187                 ast_log(LOG_DEBUG, "No echocancellation requested\n");
1188 }
1189
1190 static void zt_train_ec(struct zt_pvt *p)
1191 {
1192         int x;
1193         int res;
1194         if (p && p->echocancel && p->echotraining) {
1195                 x = 400;
1196                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_ECHOTRAIN, &x);
1197                 if (res) 
1198                         ast_log(LOG_WARNING, "Unable to request echo training on channel %d\n", p->channel);
1199                 else {
1200                         ast_log(LOG_DEBUG, "Engaged echo training on channel %d\n", p->channel);
1201                 }
1202         } else
1203                 ast_log(LOG_DEBUG, "No echo training requested\n");
1204 }
1205
1206 static void zt_disable_ec(struct zt_pvt *p)
1207 {
1208         int x;
1209         int res;
1210         if (p->echocancel) {
1211                 x = 0;
1212                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_ECHOCANCEL, &x);
1213                 if (res) 
1214                         ast_log(LOG_WARNING, "Unable to disable echo cancellation on channel %d\n", p->channel);
1215                 else
1216                         ast_log(LOG_DEBUG, "disabled echo cancellation on channel %d\n", p->channel);
1217         }
1218         p->echocanon = 0;
1219 }
1220
1221 int set_actual_gain(int fd, int chan, float rxgain, float txgain, int law)
1222 {
1223         struct  zt_gains g;
1224         float ltxgain;
1225         float lrxgain;
1226         int j,k;
1227         g.chan = chan;
1228         if ((rxgain != 0.0)  || (txgain != 0.0)) {
1229                 /* caluculate linear value of tx gain */
1230                 ltxgain = pow(10.0,txgain / 20.0);
1231                 /* caluculate linear value of rx gain */
1232                 lrxgain = pow(10.0,rxgain / 20.0);
1233                 if (law == ZT_LAW_ALAW) {
1234                         for (j=0;j<256;j++) {
1235                                 k = (int)(((float)AST_ALAW(j)) * lrxgain);
1236                                 if (k > 32767) k = 32767;
1237                                 if (k < -32767) k = -32767;
1238                                 g.rxgain[j] = AST_LIN2A(k);
1239                                 k = (int)(((float)AST_ALAW(j)) * ltxgain);
1240                                 if (k > 32767) k = 32767;
1241                                 if (k < -32767) k = -32767;
1242                                 g.txgain[j] = AST_LIN2A(k);
1243                         }
1244                 } else {
1245                         for (j=0;j<256;j++) {
1246                                 k = (int)(((float)AST_MULAW(j)) * lrxgain);
1247                                 if (k > 32767) k = 32767;
1248                                 if (k < -32767) k = -32767;
1249                                 g.rxgain[j] = AST_LIN2MU(k);
1250                                 k = (int)(((float)AST_MULAW(j)) * ltxgain);
1251                                 if (k > 32767) k = 32767;
1252                                 if (k < -32767) k = -32767;
1253                                 g.txgain[j] = AST_LIN2MU(k);
1254                         }
1255                 }
1256         } else {
1257                 for (j=0;j<256;j++) {
1258                         g.rxgain[j] = j;
1259                         g.txgain[j] = j;
1260                 }
1261         }
1262                 
1263           /* set 'em */
1264         return(ioctl(fd,ZT_SETGAINS,&g));
1265 }
1266
1267 static inline int zt_set_hook(int fd, int hs)
1268 {
1269         int x, res;
1270         x = hs;
1271         res = ioctl(fd, ZT_HOOK, &x);
1272         if (res < 0) 
1273         {
1274                 if (errno == EINPROGRESS) return 0;
1275                 ast_log(LOG_WARNING, "zt hook failed: %s\n", strerror(errno));
1276         }
1277         return res;
1278 }
1279
1280 static inline int zt_confmute(struct zt_pvt *p, int muted)
1281 {
1282         int x, y, res;
1283         x = muted;
1284         if (p->sig == SIG_PRI) {
1285                 y = 1;
1286                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &y);
1287                 if (res)
1288                         ast_log(LOG_WARNING, "Unable to set audio mode on '%d'\n", p->channel);
1289         }
1290         res = ioctl(p->subs[SUB_REAL].zfd, ZT_CONFMUTE, &x);
1291         if (res < 0) 
1292                 ast_log(LOG_WARNING, "zt confmute(%d) failed on channel %d: %s\n", muted, p->channel, strerror(errno));
1293         return res;
1294 }
1295
1296 static int save_conference(struct zt_pvt *p)
1297 {
1298         struct zt_confinfo c;
1299         int res;
1300         if (p->saveconf.confmode) {
1301                 ast_log(LOG_WARNING, "Can't save conference -- already in use\n");
1302                 return -1;
1303         }
1304         p->saveconf.chan = 0;
1305         res = ioctl(p->subs[SUB_REAL].zfd, ZT_GETCONF, &p->saveconf);
1306         if (res) {
1307                 ast_log(LOG_WARNING, "Unable to get conference info: %s\n", strerror(errno));
1308                 p->saveconf.confmode = 0;
1309                 return -1;
1310         }
1311         c.chan = 0;
1312         c.confno = 0;
1313         c.confmode = ZT_CONF_NORMAL;
1314         res = ioctl(p->subs[SUB_REAL].zfd, ZT_SETCONF, &c);
1315         if (res) {
1316                 ast_log(LOG_WARNING, "Unable to set conference info: %s\n", strerror(errno));
1317                 return -1;
1318         }
1319         if (option_debug)
1320                 ast_log(LOG_DEBUG, "Disabled conferencing\n");
1321         return 0;
1322 }
1323
1324 static int restore_conference(struct zt_pvt *p)
1325 {
1326         int res;
1327         if (p->saveconf.confmode) {
1328                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_SETCONF, &p->saveconf);
1329                 p->saveconf.confmode = 0;
1330                 if (res) {
1331                         ast_log(LOG_WARNING, "Unable to restore conference info: %s\n", strerror(errno));
1332                         return -1;
1333                 }
1334         }
1335         if (option_debug)
1336                 ast_log(LOG_DEBUG, "Restored conferencing\n");
1337         return 0;
1338 }
1339
1340 static int send_callerid(struct zt_pvt *p);
1341
1342 int send_cwcidspill(struct zt_pvt *p)
1343 {
1344         p->callwaitcas = 0;
1345         p->cidcwexpire = 0;
1346         p->cidspill = malloc(MAX_CALLERID_SIZE);
1347         if (p->cidspill) {
1348                 memset(p->cidspill, 0x7f, MAX_CALLERID_SIZE);
1349                 p->cidlen = ast_callerid_callwaiting_generate(p->cidspill, p->callwaitcid, AST_LAW(p));
1350                 /* Make sure we account for the end */
1351                 p->cidlen += READ_SIZE * 4;
1352                 p->cidpos = 0;
1353                 send_callerid(p);
1354                 if (option_verbose > 2)
1355                         ast_verbose(VERBOSE_PREFIX_3 "CPE supports Call Waiting Caller*ID.  Sending '%s'\n", p->callwaitcid);
1356         } else return -1;
1357         return 0;
1358 }
1359
1360 static int has_voicemail(struct zt_pvt *p)
1361 {
1362
1363         return ast_app_has_voicemail(p->mailbox);
1364 }
1365
1366 static int send_callerid(struct zt_pvt *p)
1367 {
1368         /* Assumes spill in p->cidspill, p->cidlen in length and we're p->cidpos into it */
1369         int res;
1370         /* Take out of linear mode if necessary */
1371         if (p->subs[SUB_REAL].linear) {
1372                 p->subs[SUB_REAL].linear = 0;
1373                 zt_setlinear(p->subs[SUB_REAL].zfd, 0);
1374         }
1375         while(p->cidpos < p->cidlen) {
1376                 res = write(p->subs[SUB_REAL].zfd, p->cidspill + p->cidpos, p->cidlen - p->cidpos);
1377                 if (res < 0) {
1378                         if (errno == EAGAIN)
1379                                 return 0;
1380                         else {
1381                                 ast_log(LOG_WARNING, "write failed: %s\n", strerror(errno));
1382                                 return -1;
1383                         }
1384                 }
1385                 if (!res)
1386                         return 0;
1387                 p->cidpos += res;
1388         }
1389         free(p->cidspill);
1390         p->cidspill = NULL;
1391         if (p->callwaitcas) {
1392                 /* Wait for CID/CW to expire */
1393                 p->cidcwexpire = CIDCW_EXPIRE_SAMPLES;
1394         } else
1395                 restore_conference(p);
1396         return 0;
1397 }
1398
1399 static int zt_callwait(struct ast_channel *ast)
1400 {
1401         struct zt_pvt *p = ast->pvt->pvt;
1402         p->callwaitingrepeat = CALLWAITING_REPEAT_SAMPLES;
1403         if (p->cidspill) {
1404                 ast_log(LOG_WARNING, "Spill already exists?!?\n");
1405                 free(p->cidspill);
1406         }
1407         p->cidspill = malloc(2400 /* SAS */ + 680 /* CAS */ + READ_SIZE * 4);
1408         if (p->cidspill) {
1409                 save_conference(p);
1410                 /* Silence */
1411                 memset(p->cidspill, 0x7f, 2400 + 600 + READ_SIZE * 4);
1412                 if (!p->callwaitrings && p->callwaitingcallerid) {
1413                         ast_gen_cas(p->cidspill, 1, 2400 + 680, AST_LAW(p));
1414                         p->callwaitcas = 1;
1415                         p->cidlen = 2400 + 680 + READ_SIZE * 4;
1416                 } else {
1417                         ast_gen_cas(p->cidspill, 1, 2400, AST_LAW(p));
1418                         p->callwaitcas = 0;
1419                         p->cidlen = 2400 + READ_SIZE * 4;
1420                 }
1421                 p->cidpos = 0;
1422                 send_callerid(p);
1423         } else {
1424                 ast_log(LOG_WARNING, "Unable to create SAS/CAS spill\n");
1425                 return -1;
1426         }
1427         return 0;
1428 }
1429
1430 static int zt_call(struct ast_channel *ast, char *rdest, int timeout)
1431 {
1432         struct zt_pvt *p = ast->pvt->pvt;
1433         int x, res, index;
1434         char *c, *n, *l;
1435 #ifdef ZAPATA_PRI
1436         char *s;
1437 #endif
1438         char callerid[256];
1439         char dest[256]; /* must be same length as p->dialdest */
1440         ast_mutex_lock(&p->lock);
1441         strncpy(dest, rdest, sizeof(dest) - 1);
1442         strncpy(p->dialdest, rdest, sizeof(dest) - 1);
1443         if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
1444                 ast_log(LOG_WARNING, "zt_call called on %s, neither down nor reserved\n", ast->name);
1445                 ast_mutex_unlock(&p->lock);
1446                 return -1;
1447         }
1448         p->dialednone = 0;
1449         if (p->radio)  /* if a radio channel, up immediately */
1450         {
1451                 /* Special pseudo -- automatically up */
1452                 ast_setstate(ast, AST_STATE_UP); 
1453                 ast_mutex_unlock(&p->lock);
1454                 return 0;
1455         }
1456         x = ZT_FLUSH_READ | ZT_FLUSH_WRITE;
1457         res = ioctl(p->subs[SUB_REAL].zfd, ZT_FLUSH, &x);
1458         if (res)
1459                 ast_log(LOG_WARNING, "Unable to flush input on channel %d\n", p->channel);
1460         p->outgoing = 1;
1461
1462         set_actual_gain(p->subs[SUB_REAL].zfd, 0, p->rxgain, p->txgain, p->law);
1463
1464         switch(p->sig) {
1465         case SIG_FXOLS:
1466         case SIG_FXOGS:
1467         case SIG_FXOKS:
1468                 if (p->owner == ast) {
1469                         /* Normal ring, on hook */
1470                         
1471                         /* Don't send audio while on hook, until the call is answered */
1472                         p->dialing = 1;
1473                         if (p->use_callerid) {
1474                                 /* Generate the Caller-ID spill if desired */
1475                                 if (p->cidspill) {
1476                                         ast_log(LOG_WARNING, "cidspill already exists??\n");
1477                                         free(p->cidspill);
1478                                 }
1479                                 p->cidspill = malloc(MAX_CALLERID_SIZE);
1480                                 p->callwaitcas = 0;
1481                                 if (p->cidspill) {
1482                                         p->cidlen = ast_callerid_generate(p->cidspill, ast->callerid, AST_LAW(p));
1483                                         p->cidpos = 0;
1484                                         send_callerid(p);
1485                                 } else
1486                                         ast_log(LOG_WARNING, "Unable to generate CallerID spill\n");
1487                         }
1488                         /* Choose proper cadence */
1489                         if ((p->distinctivering > 0) && (p->distinctivering <= num_cadence)) {
1490                                 if (ioctl(p->subs[SUB_REAL].zfd, ZT_SETCADENCE, &cadences[p->distinctivering-1]))
1491                                         ast_log(LOG_WARNING, "Unable to set distinctive ring cadence %d on '%s'\n", p->distinctivering, ast->name);
1492                                 p->cidrings = cidrings[p->distinctivering - 1];
1493                         } else {
1494                                 if (ioctl(p->subs[SUB_REAL].zfd, ZT_SETCADENCE, NULL))
1495                                         ast_log(LOG_WARNING, "Unable to reset default ring on '%s'\n", ast->name);
1496                                 p->cidrings = DEFAULT_CIDRINGS;
1497                         }
1498
1499
1500                         /* nick@dccinc.com 4/3/03 mods to allow for deferred dialing */
1501                         c = strchr(dest, '/');
1502                         if (c)
1503                                 c++;
1504                         if (c && (strlen(c) < p->stripmsd)) {
1505                                 ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
1506                                 c = NULL;
1507                         }
1508                         if (c) {
1509                                 p->dop.op = ZT_DIAL_OP_REPLACE;
1510                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "Tw%s", c);
1511                                 ast_log(LOG_DEBUG, "FXO: setup deferred dialstring: %s\n", c);
1512                         } else {
1513                                 strcpy(p->dop.dialstr, "");
1514                         }
1515                         x = ZT_RING;
1516                         if (ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x) && (errno != EINPROGRESS)) {
1517                                 ast_log(LOG_WARNING, "Unable to ring phone: %s\n", strerror(errno));
1518                                 ast_mutex_unlock(&p->lock);
1519                                 return -1;
1520                         }
1521                         p->dialing = 1;
1522                 } else {
1523                         /* Call waiting call */
1524                         p->callwaitrings = 0;
1525                         if (ast->callerid)
1526                                 strncpy(p->callwaitcid, ast->callerid, sizeof(p->callwaitcid)-1);
1527                         else
1528                                 strcpy(p->callwaitcid, "");
1529                         /* Call waiting tone instead */
1530                         if (zt_callwait(ast)) {
1531                                 ast_mutex_unlock(&p->lock);
1532                                 return -1;
1533                         }
1534                         /* Make ring-back */
1535                         if (tone_zone_play_tone(p->subs[SUB_CALLWAIT].zfd, ZT_TONE_RINGTONE))
1536                                 ast_log(LOG_WARNING, "Unable to generate call-wait ring-back on channel %s\n", ast->name);
1537                                 
1538                 }
1539                 if (ast->callerid) 
1540                         strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1541                 else
1542                         strcpy(callerid, "");
1543                 ast_callerid_parse(callerid, &n, &l);
1544                 if (l) {
1545                         ast_shrink_phone_number(l);
1546                         if (!ast_isphonenumber(l))
1547                                 l = NULL;
1548                 }
1549                 if (l)
1550                         strcpy(p->lastcallerid, l);
1551                 else
1552                         strcpy(p->lastcallerid, "");
1553                 ast_setstate(ast, AST_STATE_RINGING);
1554                 index = zt_get_index(ast, p, 0);
1555                 if (index > -1) {
1556                         p->subs[index].needringing = 1;
1557                 }
1558                 break;
1559         case SIG_FXSLS:
1560         case SIG_FXSGS:
1561         case SIG_FXSKS:
1562         case SIG_EMWINK:
1563         case SIG_EM:
1564         case SIG_EM_E1:
1565         case SIG_FEATD:
1566         case SIG_FEATDMF:
1567         case SIG_E911:
1568         case SIG_FEATB:
1569         case SIG_SFWINK:
1570         case SIG_SF:
1571         case SIG_SF_FEATD:
1572         case SIG_SF_FEATDMF:
1573         case SIG_SF_FEATB:
1574                 c = strchr(dest, '/');
1575                 if (c)
1576                         c++;
1577                 else
1578                         c = "";
1579                 if (strlen(c) < p->stripmsd) {
1580                         ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
1581                         ast_mutex_unlock(&p->lock);
1582                         return -1;
1583                 }
1584                 x = ZT_START;
1585                 /* Start the trunk */
1586                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
1587                 if (res < 0) {
1588                         if (errno != EINPROGRESS) {
1589                                 ast_log(LOG_WARNING, "Unable to start channel: %s\n", strerror(errno));
1590                                 ast_mutex_unlock(&p->lock);
1591                                 return -1;
1592                         }
1593                 }
1594                 ast_log(LOG_DEBUG, "Dialing '%s'\n", c);
1595                 p->dop.op = ZT_DIAL_OP_REPLACE;
1596                 if (p->sig == SIG_FEATD) {
1597                         if (ast->callerid) {
1598                                 strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1599                                 ast_callerid_parse(callerid, &n, &l);
1600                                 if (l) {
1601                                         ast_shrink_phone_number(l);
1602                                         if (!ast_isphonenumber(l))
1603                                                 l = NULL;
1604                                 }
1605                         } else
1606                                 l = NULL;
1607                         if (l) 
1608                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T*%s*%s*", l, c + p->stripmsd);
1609                         else
1610                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T**%s*", c + p->stripmsd);
1611                 } else 
1612                 if (p->sig == SIG_FEATDMF) {
1613                         if (ast->callerid) {
1614                                 strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1615                                 ast_callerid_parse(callerid, &n, &l);
1616                                 if (l) {
1617                                         ast_shrink_phone_number(l);
1618                                         if (!ast_isphonenumber(l))
1619                                                 l = NULL;
1620                                 }
1621                         } else
1622                                 l = NULL;
1623                         if (l) 
1624                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "M*00%s#*%s#", l, c + p->stripmsd);
1625                         else
1626                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "M*02#*%s#", c + p->stripmsd);
1627                 } else 
1628                 if (p->sig == SIG_E911) {
1629                         strcpy(p->dop.dialstr,"M*911#");
1630                 } else
1631                 if (p->sig == SIG_FEATB) {
1632                         snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "M*%s#", c + p->stripmsd);
1633                 } else 
1634                         snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T%sw", c + p->stripmsd);
1635                 if (strlen(p->dop.dialstr) > 4) {
1636                         strcpy(p->echorest, "w");
1637                         strcpy(p->echorest + 1, p->dop.dialstr + strlen(p->dop.dialstr) - 2);
1638                         p->echobreak = 1;
1639                         p->dop.dialstr[strlen(p->dop.dialstr)-2] = '\0';
1640                 } else
1641                         p->echobreak = 0;
1642                 if (!res) {
1643                         if (ioctl(p->subs[SUB_REAL].zfd, ZT_DIAL, &p->dop)) {
1644                                 x = ZT_ONHOOK;
1645                                 ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
1646                                 ast_log(LOG_WARNING, "Dialing failed on channel %d: %s\n", p->channel, strerror(errno));
1647                                 ast_mutex_unlock(&p->lock);
1648                                 return -1;
1649                         }
1650                 } else
1651                         ast_log(LOG_DEBUG, "Deferring dialing...\n");
1652                 p->dialing = 1;
1653                 if (strlen(c + p->stripmsd) < 1) p->dialednone = 1;
1654                 ast_setstate(ast, AST_STATE_DIALING);
1655                 break;
1656         case 0:
1657                 /* Special pseudo -- automatically up*/
1658                 ast_setstate(ast, AST_STATE_UP);
1659                 break;          
1660         case SIG_PRI:
1661                 /* We'll get it in a moment */
1662                 break;
1663         default:
1664                 ast_log(LOG_DEBUG, "not yet implemented\n");
1665                 ast_mutex_unlock(&p->lock);
1666                 return -1;
1667         }
1668 #ifdef ZAPATA_PRI
1669         if (p->pri) {
1670                 struct pri_sr *sr;
1671                 c = strchr(dest, '/');
1672                 if (c)
1673                         c++;
1674                 else
1675                         c = dest;
1676                 if (ast->callerid && !p->hidecallerid) {
1677                         strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1678                         ast_callerid_parse(callerid, &n, &l);
1679                         if (l) {
1680                                 ast_shrink_phone_number(l);
1681                                 if (!ast_isphonenumber(l))
1682                                         l = NULL;
1683                         }
1684                 } else
1685                         l = NULL;
1686                 if (strlen(c) < p->stripmsd) {
1687                         ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
1688                         ast_mutex_unlock(&p->lock);
1689                         return -1;
1690                 }
1691                 p->dop.op = ZT_DIAL_OP_REPLACE;
1692                 s = strchr(c + p->stripmsd, 'w');
1693                 if (s) {
1694                         if (strlen(s))
1695                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T%s", s);
1696                         else
1697                                 strcpy(p->dop.dialstr, "");
1698                         *s = '\0';
1699                 } else {
1700                         strcpy(p->dop.dialstr, "");
1701                 }
1702                 if (pri_grab(p, p->pri)) {
1703                         ast_log(LOG_WARNING, "Failed to grab PRI!\n");
1704                         ast_mutex_unlock(&p->lock);
1705                         return -1;
1706                 }
1707                 if (!(p->call = pri_new_call(p->pri->pri))) {
1708                         ast_log(LOG_WARNING, "Unable to create call on channel %d\n", p->channel);
1709                         pri_rel(p->pri);
1710                         ast_mutex_unlock(&p->lock);
1711                         return -1;
1712                 }
1713                 if (!(sr = pri_sr_new())) {
1714                         ast_log(LOG_WARNING, "Failed to allocate setup request channel %d\n", p->channel);
1715                         pri_rel(p->pri);
1716                         ast_mutex_unlock(&p->lock);
1717                 }
1718                 if (p->bearer) {
1719                         ast_log(LOG_DEBUG, "Oooh, I have a bearer on %d (%d:%d)\n", PVT_TO_CHANNEL(p->bearer), p->bearer->logicalspan, p->bearer->channel);
1720                         pri_set_crv(p->pri->pri, p->call, p->channel, 0);
1721                         p->bearer->call = p->call;
1722                 }
1723                 p->digital = ast_test_flag(ast,AST_FLAG_DIGITAL);
1724                 pri_sr_set_channel(sr, p->bearer ? PVT_TO_CHANNEL(p->bearer) : PVT_TO_CHANNEL(p), 
1725                                                                 p->pri->nodetype == PRI_NETWORK ? 0 : 1, 1);
1726                 pri_sr_set_bearer(sr, p->digital ? PRI_TRANS_CAP_DIGITAL : PRI_TRANS_CAP_SPEECH, 
1727                                         (p->digital ? -1 : 
1728                                                 ((p->law == ZT_LAW_ALAW) ? PRI_LAYER_1_ALAW : PRI_LAYER_1_ULAW)));
1729                 pri_sr_set_called(sr, c + p->stripmsd, p->pri->dialplan - 1,  s ? 1 : 0);
1730                 pri_sr_set_caller(sr, l, n, p->pri->dialplan - 1, 
1731                                         l ? (ast->restrictcid ? PRES_PROHIB_USER_NUMBER_PASSED_SCREEN : 
1732                                                 (p->use_callingpres ? ast->callingpres : PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN)) : 
1733                                                  PRES_NUMBER_NOT_AVAILABLE);
1734                 if (pri_setup(p->pri->pri, p->call,  sr)) {
1735                         ast_log(LOG_WARNING, "Unable to setup call to %s\n", c + p->stripmsd);
1736                         pri_rel(p->pri);
1737                         ast_mutex_unlock(&p->lock);
1738                         pri_sr_free(sr);
1739                         return -1;
1740                 }
1741                 pri_sr_free(sr);
1742                 ast_setstate(ast, AST_STATE_DIALING);
1743                 pri_rel(p->pri);
1744         }
1745 #endif          
1746         ast_mutex_unlock(&p->lock);
1747         return 0;
1748 }
1749
1750 static int destroy_channel(struct zt_pvt *prev, struct zt_pvt *cur, int now)
1751 {
1752         int owned = 0;
1753         int i = 0;
1754
1755         if (!now) {
1756                 if (cur->owner) {
1757                         owned = 1;
1758                 }
1759
1760                 for (i = 0; i < 3; i++) {
1761                         if (cur->subs[i].owner) {
1762                                 owned = 1;
1763                         }
1764                 }
1765                 if (!owned) {
1766                         if (prev) {
1767                                 prev->next = cur->next;
1768                                 if (prev->next)
1769                                         prev->next->prev = prev;
1770                                 else
1771                                         ifend = prev;
1772                         } else {
1773                                 iflist = cur->next;
1774                                 if (iflist)
1775                                         iflist->prev = NULL;
1776                                 else
1777                                         ifend = NULL;
1778                         }
1779                         if (cur->subs[SUB_REAL].zfd > -1) {
1780                                 zt_close(cur->subs[SUB_REAL].zfd);
1781                         }
1782                         free(cur);
1783                 }
1784         } else {
1785                 if (prev) {
1786                         prev->next = cur->next;
1787                         if (prev->next)
1788                                 prev->next->prev = prev;
1789                         else
1790                                 ifend = prev;
1791                 } else {
1792                         iflist = cur->next;
1793                         if (iflist)
1794                                 iflist->prev = NULL;
1795                         else
1796                                 ifend = NULL;
1797                 }
1798                 if (cur->subs[SUB_REAL].zfd > -1) {
1799                         zt_close(cur->subs[SUB_REAL].zfd);
1800                 }
1801                 free(cur);
1802         }
1803         return 0;
1804 }
1805
1806 #ifdef ZAPATA_PRI
1807 int pri_is_up(struct zt_pri *pri)
1808 {
1809         int x;
1810         for (x=0;x<NUM_DCHANS;x++) {
1811                 if (pri->dchanavail[x] == DCHAN_AVAILABLE)
1812                         return 1;
1813         }
1814         return 0;
1815 }
1816
1817 int pri_assign_bearer(struct zt_pvt *crv, struct zt_pri *pri, struct zt_pvt *bearer)
1818 {
1819         bearer->owner = &inuse;
1820         bearer->master = crv;
1821         crv->subs[SUB_REAL].zfd = bearer->subs[SUB_REAL].zfd;
1822         crv->bearer = bearer;
1823         crv->call = bearer->call;
1824         crv->pri = pri;
1825         return 0;
1826 }
1827
1828 static char *pri_order(int level)
1829 {
1830         switch(level) {
1831         case 0:
1832                 return "Primary";
1833         case 1:
1834                 return "Secondary";
1835         case 2:
1836                 return "Tertiary";
1837         case 3:
1838                 return "Quaternary";
1839         default:
1840                 return "<Unknown>";
1841         }               
1842 }
1843
1844 int pri_find_dchan(struct zt_pri *pri)
1845 {
1846         int oldslot = -1;
1847         struct pri *old;
1848         int newslot = -1;
1849         int x;
1850         old = pri->pri;
1851         for(x=0;x<NUM_DCHANS;x++) {
1852                 if ((pri->dchanavail[x] == DCHAN_AVAILABLE) && (newslot < 0))
1853                         newslot = x;
1854                 if (pri->dchans[x] == old) {
1855                         oldslot = x;
1856                 }
1857         }
1858         if (newslot < 0) {
1859                 ast_log(LOG_WARNING, "No D-channels available!  Using Primary on channel anyway %d!\n",
1860                         pri->dchannels[newslot]);
1861                 newslot = 0;
1862         }
1863         if (old && (oldslot != newslot))
1864                 ast_log(LOG_NOTICE, "Switching from from d-channel %d to channel %d!\n",
1865                         pri->dchannels[oldslot], pri->dchannels[newslot]);
1866         pri->pri = pri->dchans[newslot];
1867         return 0;
1868 }
1869 #endif
1870
1871 static int zt_hangup(struct ast_channel *ast)
1872 {
1873         int res;
1874         int index,x, law;
1875         static int restore_gains(struct zt_pvt *p);
1876         struct zt_pvt *p = ast->pvt->pvt;
1877         struct zt_pvt *tmp = NULL;
1878         struct zt_pvt *prev = NULL;
1879         ZT_PARAMS par;
1880
1881         if (option_debug)
1882                 ast_log(LOG_DEBUG, "zt_hangup(%s)\n", ast->name);
1883         if (!ast->pvt->pvt) {
1884                 ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
1885                 return 0;
1886         }
1887         
1888         ast_mutex_lock(&p->lock);
1889         
1890         index = zt_get_index(ast, p, 1);
1891
1892         if (p->sig == SIG_PRI) {
1893                 x = 1;
1894                 ast_channel_setoption(ast,AST_OPTION_AUDIO_MODE,&x,sizeof(char),0);
1895         }
1896
1897         x = 0;
1898         zt_confmute(p, 0);
1899         restore_gains(p);
1900         if (p->origcallerid) {
1901                 strncpy(p->callerid, p->origcallerid, sizeof(p->callerid) - 1);
1902                 free(p->origcallerid);
1903                 p->origcallerid = NULL;
1904         }       
1905         if (p->dsp)
1906                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_DTMF | p->dtmfrelax);
1907         if (p->exten)
1908                 strcpy(p->exten, "");
1909
1910         ast_log(LOG_DEBUG, "Hangup: channel: %d index = %d, normal = %d, callwait = %d, thirdcall = %d\n",
1911                 p->channel, index, p->subs[SUB_REAL].zfd, p->subs[SUB_CALLWAIT].zfd, p->subs[SUB_THREEWAY].zfd);
1912         p->ignoredtmf = 0;
1913         
1914         if (index > -1) {
1915                 /* Real channel, do some fixup */
1916                 p->subs[index].owner = NULL;
1917                 p->subs[index].needanswer = 0;
1918                 p->subs[index].needringing = 0;
1919                 p->subs[index].needbusy = 0;
1920                 p->subs[index].needcongestion = 0;
1921                 p->subs[index].linear = 0;
1922                 p->subs[index].needcallerid = 0;
1923                 zt_setlinear(p->subs[index].zfd, 0);
1924                 if (index == SUB_REAL) {
1925                         if ((p->subs[SUB_CALLWAIT].zfd > -1) && (p->subs[SUB_THREEWAY].zfd > -1)) {
1926                                 ast_log(LOG_DEBUG, "Normal call hung up with both three way call and a call waiting call in place?\n");
1927                                 if (p->subs[SUB_CALLWAIT].inthreeway) {
1928                                         /* We had flipped over to answer a callwait and now it's gone */
1929                                         ast_log(LOG_DEBUG, "We were flipped over to the callwait, moving back and unowning.\n");
1930                                         /* Move to the call-wait, but un-own us until they flip back. */
1931                                         swap_subs(p, SUB_CALLWAIT, SUB_REAL);
1932                                         unalloc_sub(p, SUB_CALLWAIT);
1933                                         p->owner = NULL;
1934                                 } else {
1935                                         /* The three way hung up, but we still have a call wait */
1936                                         ast_log(LOG_DEBUG, "We were in the threeway and have a callwait still.  Ditching the threeway.\n");
1937                                         swap_subs(p, SUB_THREEWAY, SUB_REAL);
1938                                         unalloc_sub(p, SUB_THREEWAY);
1939                                         if (p->subs[SUB_REAL].inthreeway) {
1940                                                 /* This was part of a three way call.  Immediately make way for
1941                                                    another call */
1942                                                 ast_log(LOG_DEBUG, "Call was complete, setting owner to former third call\n");
1943                                                 p->owner = p->subs[SUB_REAL].owner;
1944                                         } else {
1945                                                 /* This call hasn't been completed yet...  Set owner to NULL */
1946                                                 ast_log(LOG_DEBUG, "Call was incomplete, setting owner to NULL\n");
1947                                                 p->owner = NULL;
1948                                         }
1949                                         p->subs[SUB_REAL].inthreeway = 0;
1950                                 }
1951                         } else if (p->subs[SUB_CALLWAIT].zfd > -1) {
1952                                 /* Move to the call-wait and switch back to them. */
1953                                 swap_subs(p, SUB_CALLWAIT, SUB_REAL);
1954                                 unalloc_sub(p, SUB_CALLWAIT);
1955                                 p->owner = p->subs[SUB_REAL].owner;
1956                                 if (p->owner->_state != AST_STATE_UP)
1957                                         p->subs[SUB_REAL].needanswer = 1;
1958                                 if (p->subs[SUB_REAL].owner->bridge)
1959                                         ast_moh_stop(p->subs[SUB_REAL].owner->bridge);
1960                         } else if (p->subs[SUB_THREEWAY].zfd > -1) {
1961                                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
1962                                 unalloc_sub(p, SUB_THREEWAY);
1963                                 if (p->subs[SUB_REAL].inthreeway) {
1964                                         /* This was part of a three way call.  Immediately make way for
1965                                            another call */
1966                                         ast_log(LOG_DEBUG, "Call was complete, setting owner to former third call\n");
1967                                         p->owner = p->subs[SUB_REAL].owner;
1968                                 } else {
1969                                         /* This call hasn't been completed yet...  Set owner to NULL */
1970                                         ast_log(LOG_DEBUG, "Call was incomplete, setting owner to NULL\n");
1971                                         p->owner = NULL;
1972                                 }
1973                                 p->subs[SUB_REAL].inthreeway = 0;
1974                         }
1975                 } else if (index == SUB_CALLWAIT) {
1976                         /* Ditch the holding callwait call, and immediately make it availabe */
1977                         if (p->subs[SUB_CALLWAIT].inthreeway) {
1978                                 /* This is actually part of a three way, placed on hold.  Place the third part
1979                                    on music on hold now */
1980                                 if (p->subs[SUB_THREEWAY].owner && p->subs[SUB_THREEWAY].owner->bridge)
1981                                         ast_moh_start(p->subs[SUB_THREEWAY].owner->bridge, NULL);
1982                                 p->subs[SUB_THREEWAY].inthreeway = 0;
1983                                 /* Make it the call wait now */
1984                                 swap_subs(p, SUB_CALLWAIT, SUB_THREEWAY);
1985                                 unalloc_sub(p, SUB_THREEWAY);
1986                         } else
1987                                 unalloc_sub(p, SUB_CALLWAIT);
1988                 } else if (index == SUB_THREEWAY) {
1989                         if (p->subs[SUB_CALLWAIT].inthreeway) {
1990                                 /* The other party of the three way call is currently in a call-wait state.
1991                                    Start music on hold for them, and take the main guy out of the third call */
1992                                 if (p->subs[SUB_CALLWAIT].owner && p->subs[SUB_CALLWAIT].owner->bridge)
1993                                         ast_moh_start(p->subs[SUB_CALLWAIT].owner->bridge, NULL);
1994                                 p->subs[SUB_CALLWAIT].inthreeway = 0;
1995                         }
1996                         p->subs[SUB_REAL].inthreeway = 0;
1997                         /* If this was part of a three way call index, let us make
1998                            another three way call */
1999                         unalloc_sub(p, SUB_THREEWAY);
2000                 } else {
2001                         /* This wasn't any sort of call, but how are we an index? */
2002                         ast_log(LOG_WARNING, "Index found but not any type of call?\n");
2003                 }
2004         }
2005
2006
2007         if (!p->subs[SUB_REAL].owner && !p->subs[SUB_CALLWAIT].owner && !p->subs[SUB_THREEWAY].owner) {
2008                 p->owner = NULL;
2009                 p->ringt = 0;
2010                 p->distinctivering = 0;
2011                 p->confirmanswer = 0;
2012                 p->cidrings = 1;
2013                 p->outgoing = 0;
2014                 p->digital = 0;
2015                 p->faxhandled = 0;
2016                 p->pulsedial = 0;
2017                 p->onhooktime = time(NULL);
2018 #ifdef ZAPATA_PRI
2019                 p->proceeding = 0;
2020                 p->setup_ack = 0;
2021 #endif          
2022                 if (p->dsp) {
2023                         ast_dsp_free(p->dsp);
2024                         p->dsp = NULL;
2025                 }
2026
2027                 law = ZT_LAW_DEFAULT;
2028                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_SETLAW, &law);
2029                 if (res < 0) 
2030                         ast_log(LOG_WARNING, "Unable to set law on channel %d to default\n", p->channel);
2031                 /* Perform low level hangup if no owner left */
2032 #ifdef ZAPATA_PRI
2033                 if (p->pri) {
2034                         /* Make sure we have a call (or REALLY have a call in the case of a PRI) */
2035                         if (p->call && (!p->bearer || (p->bearer->call == p->call))) {
2036                                 if (!pri_grab(p, p->pri)) {
2037                                         if (p->alreadyhungup) {
2038                                                 ast_log(LOG_DEBUG, "Already hungup...  Calling hangup once, and clearing call\n");
2039                                                 pri_hangup(p->pri->pri, p->call, -1);
2040                                                 p->call = NULL;
2041                                                 if (p->bearer) 
2042                                                         p->bearer->call = NULL;
2043                                         } else {
2044                                                 char *cause = pbx_builtin_getvar_helper(ast,"PRI_CAUSE");
2045                                                 int icause = ast->hangupcause ? hangup_cause2pri(ast->hangupcause) : -1;
2046                                                 ast_log(LOG_DEBUG, "Not yet hungup...  Calling hangup once with icause, and clearing call\n");
2047                                                 p->alreadyhungup = 1;
2048                                                 if (p->bearer)
2049                                                         p->bearer->alreadyhungup = 1;
2050                                                 if (cause) {
2051                                                         if (atoi(cause))
2052                                                                 icause = atoi(cause);
2053                                                 }
2054                                                 pri_hangup(p->pri->pri, p->call, icause);
2055                                         }
2056                                         if (res < 0) 
2057                                                 ast_log(LOG_WARNING, "pri_disconnect failed\n");
2058                                         pri_rel(p->pri);                        
2059                                 } else {
2060                                         ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
2061                                         res = -1;
2062                                 }
2063                         } else {
2064                                 if (p->bearer)
2065                                         ast_log(LOG_DEBUG, "Bearer call is %p, while ours is still %p\n", p->bearer->call, p->call);
2066                                 p->call = NULL;
2067                                 res = 0;
2068                         }
2069                 }
2070 #endif
2071 #ifdef ZAPATA_R2
2072                 if (p->sig == SIG_R2) {
2073                         if (p->hasr2call) {
2074                                 mfcr2_DropCall(p->r2, NULL, UC_NORMAL_CLEARING);
2075                                 p->hasr2call = 0;
2076                                 res = 0;
2077                         } else
2078                                 res = 0;
2079
2080                 }
2081 #endif
2082                 if (p->sig && (p->sig != SIG_PRI) && (p->sig != SIG_R2))
2083                         res = zt_set_hook(p->subs[SUB_REAL].zfd, ZT_ONHOOK);
2084                 if (res < 0) {
2085                         ast_log(LOG_WARNING, "Unable to hangup line %s\n", ast->name);
2086                 }
2087                 switch(p->sig) {
2088                 case SIG_FXOGS:
2089                 case SIG_FXOLS:
2090                 case SIG_FXOKS:
2091                         res = ioctl(p->subs[SUB_REAL].zfd, ZT_GET_PARAMS, &par);
2092                         if (!res) {
2093 #if 0
2094                                 ast_log(LOG_DEBUG, "Hanging up channel %d, offhook = %d\n", p->channel, par.rxisoffhook);
2095 #endif
2096                                 /* If they're off hook, try playing congestion */
2097                                 if (par.rxisoffhook)
2098                                         tone_zone_play_tone(p->subs[SUB_REAL].zfd, ZT_TONE_CONGESTION);
2099                                 else
2100                                         tone_zone_play_tone(p->subs[SUB_REAL].zfd, -1);
2101                         }
2102                         break;
2103                 case SIG_FXSGS:
2104                 case SIG_FXSLS:
2105                 case SIG_FXSKS:
2106                         /* Make sure we're not made available for at least two seconds */
2107                         time(&p->guardtime);
2108                         p->guardtime += 2;
2109                         break;
2110                 default:
2111                         tone_zone_play_tone(p->subs[SUB_REAL].zfd, -1);
2112                 }
2113                 if (p->cidspill)
2114                         free(p->cidspill);
2115                 if (p->sig)
2116                         zt_disable_ec(p);
2117                 x = 0;
2118                 ast_channel_setoption(ast,AST_OPTION_TONE_VERIFY,&x,sizeof(char),0);
2119                 ast_channel_setoption(ast,AST_OPTION_TDD,&x,sizeof(char),0);
2120                 p->didtdd = 0;
2121                 p->cidspill = NULL;
2122                 p->callwaitcas = 0;
2123                 p->callwaiting = p->permcallwaiting;
2124                 p->hidecallerid = p->permhidecallerid;
2125                 p->dialing = 0;
2126                 strcpy(p->rdnis, "");
2127                 update_conf(p);
2128                 /* Restore data mode */
2129                 if (p->sig == SIG_PRI) {
2130                         x = 0;
2131                         ast_channel_setoption(ast,AST_OPTION_AUDIO_MODE,&x,sizeof(char),0);
2132                 }
2133 #ifdef ZAPATA_PRI
2134                 if (p->bearer) {
2135                         ast_log(LOG_DEBUG, "Freeing up bearer channel %d\n", p->bearer->channel);
2136                         /* Free up the bearer channel as well, and
2137                            don't use its file descriptor anymore */
2138                         p->bearer->owner = NULL;
2139                         p->bearer = NULL;
2140                         p->subs[SUB_REAL].zfd = -1;
2141                         p->pri = NULL;
2142                 }
2143 #endif
2144                 restart_monitor();
2145         }
2146
2147
2148         p->callwaitingrepeat = 0;
2149         p->cidcwexpire = 0;
2150         ast->pvt->pvt = NULL;
2151         ast_mutex_unlock(&p->lock);
2152         ast_mutex_lock(&usecnt_lock);
2153         usecnt--;
2154         if (usecnt < 0) 
2155                 ast_log(LOG_WARNING, "Usecnt < 0???\n");
2156         ast_mutex_unlock(&usecnt_lock);
2157         ast_update_use_count();
2158         if (option_verbose > 2) 
2159                 ast_verbose( VERBOSE_PREFIX_3 "Hungup '%s'\n", ast->name);
2160
2161         ast_mutex_lock(&iflock);
2162         tmp = iflist;
2163         prev = NULL;
2164         if (p->destroy) {
2165                 while (tmp) {
2166                         if (tmp == p) {
2167                                 destroy_channel(prev, tmp, 0);
2168                                 break;
2169                         } else {
2170                                 prev = tmp;
2171                                 tmp = tmp->next;
2172                         }
2173                 }
2174         }
2175         ast_mutex_unlock(&iflock);
2176         return 0;
2177 }
2178
2179 static int zt_answer(struct ast_channel *ast)
2180 {
2181         struct zt_pvt *p = ast->pvt->pvt;
2182         int res=0;
2183         int index;
2184         int oldstate = ast->_state;
2185         ast_setstate(ast, AST_STATE_UP);
2186         ast_mutex_lock(&p->lock);
2187         index = zt_get_index(ast, p, 0);
2188         if (index < 0)
2189                 index = SUB_REAL;
2190         /* nothing to do if a radio channel */
2191         if (p->radio) {
2192                 ast_mutex_unlock(&p->lock);
2193                 return 0;
2194         }
2195         switch(p->sig) {
2196         case SIG_FXSLS:
2197         case SIG_FXSGS:
2198         case SIG_FXSKS:
2199                 p->ringt = 0;
2200                 /* Fall through */
2201         case SIG_EM:
2202         case SIG_EM_E1:
2203         case SIG_EMWINK:
2204         case SIG_FEATD:
2205         case SIG_FEATDMF:
2206         case SIG_E911:
2207         case SIG_FEATB:
2208         case SIG_SF:
2209         case SIG_SFWINK:
2210         case SIG_SF_FEATD:
2211         case SIG_SF_FEATDMF:
2212         case SIG_SF_FEATB:
2213         case SIG_FXOLS:
2214         case SIG_FXOGS:
2215         case SIG_FXOKS:
2216                 /* Pick up the line */
2217                 ast_log(LOG_DEBUG, "Took %s off hook\n", ast->name);
2218                 res =  zt_set_hook(p->subs[SUB_REAL].zfd, ZT_OFFHOOK);
2219                 tone_zone_play_tone(p->subs[index].zfd, -1);
2220                 p->dialing = 0;
2221                 if ((index == SUB_REAL) && p->subs[SUB_THREEWAY].inthreeway) {
2222                         if (oldstate == AST_STATE_RINGING) {
2223                                 ast_log(LOG_DEBUG, "Finally swapping real and threeway\n");
2224                                 tone_zone_play_tone(p->subs[SUB_THREEWAY].zfd, -1);
2225                                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
2226                                 p->owner = p->subs[SUB_REAL].owner;
2227                         }
2228                 }
2229                 if (p->sig & __ZT_SIG_FXS) {
2230                         zt_enable_ec(p);
2231                         zt_train_ec(p);
2232                 }
2233                 break;
2234 #ifdef ZAPATA_PRI
2235         case SIG_PRI:
2236                 /* Send a pri acknowledge */
2237                 if (!pri_grab(p, p->pri)) {
2238                         p->proceeding = 2;
2239                         res = pri_answer(p->pri->pri, p->call, 0, 1);
2240                         pri_rel(p->pri);
2241                 } else {
2242                         ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
2243                         res= -1;
2244                 }
2245                 break;
2246 #endif
2247 #ifdef ZAPATA_R2
2248         case SIG_R2:
2249                 res = mfcr2_AnswerCall(p->r2, NULL);
2250                 if (res)
2251                         ast_log(LOG_WARNING, "R2 Answer call failed :( on %s\n", ast->name);
2252                 break;
2253 #endif                  
2254         case 0:
2255                 ast_mutex_unlock(&p->lock);
2256                 return 0;
2257         default:
2258                 ast_log(LOG_WARNING, "Don't know how to answer signalling %d (channel %d)\n", p->sig, p->channel);
2259                 res = -1;
2260         }
2261         ast_mutex_unlock(&p->lock);
2262         return res;
2263 }
2264
2265 static int zt_setoption(struct ast_channel *chan, int option, void *data, int datalen)
2266 {
2267 char    *cp;
2268 int     x;
2269
2270         struct zt_pvt *p = chan->pvt->pvt;
2271
2272         
2273         if ((option != AST_OPTION_TONE_VERIFY) && (option != AST_OPTION_AUDIO_MODE) &&
2274                 (option != AST_OPTION_TDD) && (option != AST_OPTION_RELAXDTMF))
2275            {
2276                 errno = ENOSYS;
2277                 return -1;
2278            }
2279         cp = (char *)data;
2280         if ((!cp) || (datalen < 1))
2281            {
2282                 errno = EINVAL;
2283                 return -1;
2284            }
2285         switch(option) {
2286             case AST_OPTION_TONE_VERIFY:
2287                 if (!p->dsp)
2288                         break;
2289                 switch(*cp) {
2290                     case 1:
2291                                 ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: MUTECONF(1) on %s\n",chan->name);
2292                                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_MUTECONF | p->dtmfrelax);  /* set mute mode if desired */
2293                         break;
2294                     case 2:
2295                                 ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: MUTECONF/MAX(2) on %s\n",chan->name);
2296                                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_MUTECONF | DSP_DIGITMODE_MUTEMAX | p->dtmfrelax);  /* set mute mode if desired */
2297                         break;
2298                     default:
2299                                 ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: OFF(0) on %s\n",chan->name);
2300                                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_DTMF | p->dtmfrelax);  /* set mute mode if desired */
2301                         break;
2302                 }
2303                 break;
2304             case AST_OPTION_TDD:  /* turn on or off TDD */
2305                 if (!*cp) { /* turn it off */
2306                         ast_log(LOG_DEBUG, "Set option TDD MODE, value: OFF(0) on %s\n",chan->name);
2307                         if (p->tdd) tdd_free(p->tdd);
2308                         p->tdd = 0;
2309                         p->mate = 0;
2310                         break;
2311                 }
2312                 if (*cp == 2)
2313                         ast_log(LOG_DEBUG, "Set option TDD MODE, value: MATE(2) on %s\n",chan->name);
2314                 else ast_log(LOG_DEBUG, "Set option TDD MODE, value: ON(1) on %s\n",chan->name);
2315                 p->mate = 0;
2316                 zt_disable_ec(p);
2317                 /* otherwise, turn it on */
2318                 if (!p->didtdd) { /* if havent done it yet */
2319                         unsigned char mybuf[41000],*buf;
2320                         int size,res,fd,len;
2321                         int index;
2322                         struct pollfd fds[1];
2323                         buf = mybuf;
2324                         memset(buf,0x7f,sizeof(mybuf)); /* set to silence */
2325                         ast_tdd_gen_ecdisa(buf + 16000,16000);  /* put in tone */
2326                         len = 40000;
2327                         index = zt_get_index(chan, p, 0);
2328                         if (index < 0) {
2329                                 ast_log(LOG_WARNING, "No index in TDD?\n");
2330                                 return -1;
2331                         }
2332                         fd = p->subs[index].zfd;
2333                         while(len) {
2334                                 if (ast_check_hangup(chan)) return -1;
2335                                 size = len;
2336                                 if (size > READ_SIZE)
2337                                         size = READ_SIZE;
2338                                 fds[0].fd = fd;
2339                                 fds[0].events = POLLPRI | POLLOUT;
2340                                 res = poll(fds, 1, -1);
2341                                 if (!res) {
2342                                         ast_log(LOG_DEBUG, "poll (for write) ret. 0 on channel %d\n", p->channel);
2343                                         continue;
2344                                 }
2345                                   /* if got exception */
2346                                 if (fds[0].revents & POLLPRI) return -1;
2347                                 if (!(fds[0].revents & POLLOUT)) {
2348                                         ast_log(LOG_DEBUG, "write fd not ready on channel %d\n", p->channel);
2349                                         continue;
2350                                 }
2351                                 res = write(fd, buf, size);
2352                                 if (res != size) {
2353                                         if (res == -1) return -1;
2354                                         ast_log(LOG_DEBUG, "Write returned %d (%s) on channel %d\n", res, strerror(errno), p->channel);
2355                                         break;
2356                                 }
2357                                 len -= size;
2358                                 buf += size;
2359                         }
2360                         p->didtdd = 1; /* set to have done it now */            
2361                 }
2362                 if (*cp == 2) { /* Mate mode */
2363                         if (p->tdd) tdd_free(p->tdd);
2364                         p->tdd = 0;
2365                         p->mate = 1;
2366                         break;
2367                         }               
2368                 if (!p->tdd) { /* if we dont have one yet */
2369                         p->tdd = tdd_new(); /* allocate one */
2370                 }               
2371                 break;
2372             case AST_OPTION_RELAXDTMF:  /* Relax DTMF decoding (or not) */
2373                 if (!*cp)
2374                 {               
2375                         ast_log(LOG_DEBUG, "Set option RELAX DTMF, value: OFF(0) on %s\n",chan->name);
2376                         x = 0;
2377                 }
2378                 else
2379                 {               
2380                         ast_log(LOG_DEBUG, "Set option RELAX DTMF, value: ON(1) on %s\n",chan->name);
2381                         x = 1;
2382                 }
2383                 ast_dsp_digitmode(p->dsp,x ? DSP_DIGITMODE_RELAXDTMF : DSP_DIGITMODE_DTMF | p->dtmfrelax);
2384                 break;
2385             case AST_OPTION_AUDIO_MODE:  /* Set AUDIO mode (or not) */
2386                 if (!*cp)
2387                 {               
2388                         ast_log(LOG_DEBUG, "Set option AUDIO MODE, value: OFF(0) on %s\n",chan->name);
2389                         x = 0;
2390                         zt_disable_ec(p);
2391                 }
2392                 else
2393                 {               
2394                         ast_log(LOG_DEBUG, "Set option AUDIO MODE, value: ON(1) on %s\n",chan->name);
2395                         x = 1;
2396                 }
2397                 if (ioctl(p->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &x) == -1)
2398                         ast_log(LOG_WARNING, "Unable to set audio mode on channel %d to %d\n", p->channel, x);
2399                 break;
2400         }
2401         errno = 0;
2402         return 0;
2403 }
2404
2405 static void zt_unlink(struct zt_pvt *slave, struct zt_pvt *master, int needlock)
2406 {
2407         /* Unlink a specific slave or all slaves/masters from a given master */
2408         int x;
2409         int hasslaves;
2410         if (!master)
2411                 return;
2412         if (needlock) {
2413                 ast_mutex_lock(&master->lock);
2414                 if (slave) {
2415                         while(ast_mutex_trylock(&slave->lock)) {
2416                                 ast_mutex_unlock(&master->lock);
2417                                 usleep(1);
2418                                 ast_mutex_lock(&master->lock);
2419                         }
2420                 }
2421         }
2422         hasslaves = 0;
2423         for (x=0;x<MAX_SLAVES;x++) {
2424                 if (master->slaves[x]) {
2425                         if (!slave || (master->slaves[x] == slave)) {
2426                                 /* Take slave out of the conference */
2427                                 ast_log(LOG_DEBUG, "Unlinking slave %d from %d\n", master->slaves[x]->channel, master->channel);
2428                                 conf_del(master, &master->slaves[x]->subs[SUB_REAL], SUB_REAL);
2429                                 conf_del(master->slaves[x], &master->subs[SUB_REAL], SUB_REAL);
2430                                 master->slaves[x]->master = NULL;
2431                                 master->slaves[x] = NULL;
2432                         } else
2433                                 hasslaves = 1;
2434                 }
2435                 if (!hasslaves)
2436                         master->inconference = 0;
2437         }
2438         if (!slave) {
2439                 if (master->master) {
2440                         /* Take master out of the conference */
2441                         conf_del(master->master, &master->subs[SUB_REAL], SUB_REAL);
2442                         conf_del(master, &master->master->subs[SUB_REAL], SUB_REAL);
2443                         hasslaves = 0;
2444                         for (x=0;x<MAX_SLAVES;x++) {
2445                                 if (master->master->slaves[x] == master)
2446                                         master->master->slaves[x] = NULL;
2447                                 else if (master->master->slaves[x])
2448                                         hasslaves = 1;
2449                         }
2450                         if (!hasslaves)
2451                                 master->master->inconference = 0;
2452                 }
2453                 master->master = NULL;
2454         }
2455         update_conf(master);
2456         if (needlock) {
2457                 if (slave)
2458                         ast_mutex_unlock(&slave->lock);
2459                 ast_mutex_unlock(&master->lock);
2460         }
2461 }
2462
2463 static void zt_link(struct zt_pvt *slave, struct zt_pvt *master) {
2464         int x;
2465         if (!slave || !master) {
2466                 ast_log(LOG_WARNING, "Tried to link to/from NULL??\n");
2467                 return;
2468         }
2469         for (x=0;x<MAX_SLAVES;x++) {
2470                 if (!master->slaves[x]) {
2471                         master->slaves[x] = slave;
2472                         break;
2473                 }
2474         }
2475         if (x >= MAX_SLAVES) {
2476                 ast_log(LOG_WARNING, "Replacing slave %d with new slave, %d\n", master->slaves[MAX_SLAVES - 1]->channel, slave->channel);
2477                 master->slaves[MAX_SLAVES - 1] = slave;
2478         }
2479         if (slave->master) 
2480                 ast_log(LOG_WARNING, "Replacing master %d with new master, %d\n", slave->master->channel, master->channel);
2481         slave->master = master;
2482         
2483         ast_log(LOG_DEBUG, "Making %d slave to master %d at %d\n", slave->channel, master->channel, x);
2484 }
2485
2486 static int zt_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc)
2487 {
2488         struct ast_channel *who = NULL, *cs[3];
2489         struct zt_pvt *p0, *p1, *op0, *op1;
2490         struct zt_pvt *master=NULL, *slave=NULL;
2491         struct ast_frame *f;
2492         int to;
2493         int inconf = 0;
2494         int nothingok = 0;
2495         int ofd1, ofd2;
2496         int oi1, oi2, i1 = -1, i2 = -1, t1, t2;
2497         int os1 = -1, os2 = -1;
2498         struct ast_channel *oc1, *oc2;
2499
2500         /* if need DTMF, cant native bridge */
2501         if (flags & (AST_BRIDGE_DTMF_CHANNEL_0 | AST_BRIDGE_DTMF_CHANNEL_1))
2502                 return -2;
2503                 
2504         ast_mutex_lock(&c0->lock);
2505         ast_mutex_lock(&c1->lock);
2506
2507         p0 = c0->pvt->pvt;
2508         p1 = c1->pvt->pvt;
2509         /* cant do pseudo-channels here */
2510         if (!p0 || (!p0->sig) || !p1 || (!p1->sig)) {
2511                 ast_mutex_unlock(&c0->lock);
2512                 ast_mutex_unlock(&c1->lock);
2513                 return -2;
2514         }
2515
2516         op0 = p0 = c0->pvt->pvt;
2517         op1 = p1 = c1->pvt->pvt;
2518         ofd1 = c0->fds[0];
2519         ofd2 = c1->fds[0];
2520         oi1 = zt_get_index(c0, p0, 0);
2521         oi2 = zt_get_index(c1, p1, 0);
2522         oc1 = p0->owner;
2523         oc2 = p1->owner;
2524         if ((oi1 < 0) || (oi2 < 0)) {
2525                 ast_mutex_unlock(&c0->lock);
2526                 ast_mutex_unlock(&c1->lock);
2527                 return -1;
2528         }
2529
2530
2531
2532         ast_mutex_lock(&p0->lock);
2533         if (ast_mutex_trylock(&p1->lock)) {
2534                 /* Don't block, due to potential for deadlock */
2535                 ast_mutex_unlock(&p0->lock);
2536                 ast_mutex_unlock(&c0->lock);
2537                 ast_mutex_unlock(&c1->lock);
2538                 ast_log(LOG_NOTICE, "Avoiding deadlock...\n");
2539                 return -3;
2540         }
2541         if ((oi1 == SUB_REAL) && (oi2 == SUB_REAL)) {
2542                 if (!p0->owner || !p1->owner) {
2543                         /* Currently unowned -- Do nothing.  */
2544                         nothingok = 1;
2545                 } else {
2546                         /* If we don't have a call-wait in a 3-way, and we aren't in a 3-way, we can be master */
2547                         if (!p0->subs[SUB_CALLWAIT].inthreeway && !p1->subs[SUB_REAL].inthreeway) {
2548                                 master = p0;
2549                                 slave = p1;
2550                                 inconf = 1;
2551                         } else if (!p1->subs[SUB_CALLWAIT].inthreeway && !p0->subs[SUB_REAL].inthreeway) {
2552                                 master = p1;
2553                                 slave = p0;
2554                                 inconf = 1;
2555                         } else {
2556                                 ast_log(LOG_WARNING, "Huh?  Both calls are callwaits or 3-ways?  That's clever...?\n");
2557                                 ast_log(LOG_WARNING, "p0: chan %d/%d/CW%d/3W%d, p1: chan %d/%d/CW%d/3W%d\n", p0->channel, oi1, (p0->subs[SUB_CALLWAIT].zfd > -1) ? 1 : 0, p0->subs[SUB_REAL].inthreeway,
2558                                                 p0->channel, oi1, (p1->subs[SUB_CALLWAIT].zfd > -1) ? 1 : 0, p1->subs[SUB_REAL].inthreeway);
2559                         }
2560                 }
2561         } else if ((oi1 == SUB_REAL) && (oi2 == SUB_THREEWAY)) {
2562                 if (p1->subs[SUB_THREEWAY].inthreeway) {
2563                         master = p1;
2564                         slave = p0;
2565                 } else {
2566                         nothingok = 1;
2567                 }
2568         } else if ((oi1 == SUB_THREEWAY) && (oi2 == SUB_REAL)) {
2569                 if (p0->subs[SUB_THREEWAY].inthreeway) {
2570                         master = p0;
2571                         slave = p1;
2572                 } else {
2573                         nothingok  = 1;
2574                 }
2575         } else if ((oi1 == SUB_REAL) && (oi2 == SUB_CALLWAIT)) {
2576                 /* We have a real and a call wait.  If we're in a three way call, put us in it, otherwise, 
2577                    don't put us in anything */
2578                 if (p1->subs[SUB_CALLWAIT].inthreeway) {
2579                         master = p1;
2580                         slave = p0;
2581                 } else {
2582                         nothingok = 1;
2583                 }
2584         } else if ((oi1 == SUB_CALLWAIT) && (oi2 == SUB_REAL)) {
2585                 /* Same as previous */
2586                 if (p0->subs[SUB_CALLWAIT].inthreeway) {
2587                         master = p0;
2588                         slave = p1;
2589                 } else {
2590                         nothingok = 1;
2591                 }
2592         }
2593         ast_log(LOG_DEBUG, "master: %d, slave: %d, nothingok: %d\n",
2594                 master ? master->channel : 0, slave ? slave->channel : 0, nothingok);
2595         if (master && slave) {
2596                 /* Stop any tones, or play ringtone as appropriate.  If they're bridged
2597                    in an active threeway call with a channel that is ringing, we should
2598                    indicate ringing. */
2599                 if ((oi2 == SUB_THREEWAY) && 
2600                         p1->subs[SUB_THREEWAY].inthreeway && 
2601                         p1->subs[SUB_REAL].owner && 
2602                         p1->subs[SUB_REAL].inthreeway && 
2603                         (p1->subs[SUB_REAL].owner->_state == AST_STATE_RINGING)) {
2604                                 ast_log(LOG_DEBUG, "Playing ringback on %s since %s is in a ringing three-way\n", c0->name, c1->name);
2605                                 tone_zone_play_tone(p0->subs[oi1].zfd, ZT_TONE_RINGTONE);
2606                                 os2 = p1->subs[SUB_REAL].owner->_state;
2607                 } else {
2608                                 ast_log(LOG_DEBUG, "Stoping tones on %d/%d talking to %d/%d\n", p0->channel, oi1, p1->channel, oi2);
2609                                 tone_zone_play_tone(p0->subs[oi1].zfd, -1);
2610                 }
2611                 if ((oi1 == SUB_THREEWAY) && 
2612                         p0->subs[SUB_THREEWAY].inthreeway && 
2613                         p0->subs[SUB_REAL].owner && 
2614                         p0->subs[SUB_REAL].inthreeway && 
2615                         (p0->subs[SUB_REAL].owner->_state == AST_STATE_RINGING)) {
2616                                 ast_log(LOG_DEBUG, "Playing ringback on %s since %s is in a ringing three-way\n", c1->name, c0->name);
2617                                 tone_zone_play_tone(p1->subs[oi2].zfd, ZT_TONE_RINGTONE);
2618                                 os1 = p0->subs[SUB_REAL].owner->_state;
2619                 } else {
2620                                 ast_log(LOG_DEBUG, "Stoping tones on %d/%d talking to %d/%d\n", p1->channel, oi2, p0->channel, oi1);
2621                                 tone_zone_play_tone(p1->subs[oi1].zfd, -1);
2622                 }
2623                 if ((oi1 == SUB_REAL) && (oi2 == SUB_REAL)) {
2624                         if (!p0->echocanbridged || !p1->echocanbridged) {
2625                                 /* Disable echo cancellation if appropriate */
2626                                 zt_disable_ec(p0);
2627                                 zt_disable_ec(p1);
2628                         }
2629                 }
2630                 zt_link(slave, master);
2631                 master->inconference = inconf;
2632         } else if (!nothingok)
2633                 ast_log(LOG_WARNING, "Can't link %d/%s with %d/%s\n", p0->channel, subnames[oi1], p1->channel, subnames[oi2]);
2634
2635         update_conf(p0);
2636         update_conf(p1);
2637         t1 = p0->subs[SUB_REAL].inthreeway;
2638         t2 = p1->subs[SUB_REAL].inthreeway;
2639
2640         ast_mutex_unlock(&p0->lock);
2641         ast_mutex_unlock(&p1->lock);
2642
2643         ast_mutex_unlock(&c0->lock);
2644         ast_mutex_unlock(&c1->lock);
2645
2646         /* Native bridge failed */
2647         if ((!master || !slave) && !nothingok) {
2648                 if (op0 == p0)
2649                         zt_enable_ec(p0);
2650                 if (op1 == p1)
2651                         zt_enable_ec(p1);
2652                 return -1;
2653         }
2654         
2655         cs[0] = c0;
2656         cs[1] = c1;
2657         cs[2] = NULL;
2658         for (;;) {
2659                 /* Here's our main loop...  Start by locking things, looking for private parts, 
2660                    and then balking if anything is wrong */
2661                 ast_mutex_lock(&c0->lock);
2662                 ast_mutex_lock(&c1->lock);
2663                 p0 = c0->pvt->pvt;
2664                 p1 = c1->pvt->pvt;
2665                 if (op0 == p0)
2666                         i1 = zt_get_index(c0, p0, 1);
2667                 if (op1 == p1)
2668                         i2 = zt_get_index(c1, p1, 1);
2669                 ast_mutex_unlock(&c0->lock);
2670                 ast_mutex_unlock(&c1->lock);
2671                 if ((op0 != p0) || (op1 != p1) || 
2672                     (ofd1 != c0->fds[0]) || 
2673                         (ofd2 != c1->fds[0]) ||
2674                     (p0->subs[SUB_REAL].owner && (os1 > -1) && (os1 != p0->subs[SUB_REAL].owner->_state)) || 
2675                     (p1->subs[SUB_REAL].owner && (os2 > -1) && (os2 != p1->subs[SUB_REAL].owner->_state)) || 
2676                     (oc1 != p0->owner) || 
2677                         (oc2 != p1->owner) ||
2678                         (t1 != p0->subs[SUB_REAL].inthreeway) ||
2679                         (t2 != p1->subs[SUB_REAL].inthreeway) ||
2680                         (oi1 != i1) ||
2681                         (oi2 != i2)) {
2682                         if (slave && master)
2683                                 zt_unlink(slave, master, 1);
2684                         ast_log(LOG_DEBUG, "Something changed out on %d/%d to %d/%d, returning -3 to restart\n",
2685                                                                         op0->channel, oi1, op1->channel, oi2);
2686                         if (op0 == p0)
2687                                 zt_enable_ec(p0);
2688                         if (op1 == p1)
2689                                 zt_enable_ec(p1);
2690                         return -3;
2691                 }
2692                 to = -1;
2693                 who = ast_waitfor_n(cs, 2, &to);
2694                 if (!who) {
2695                         ast_log(LOG_DEBUG, "Ooh, empty read...\n");
2696                         continue;
2697                 }
2698                 if (who->pvt->pvt == op0) 
2699                         op0->ignoredtmf = 1;
2700                 else if (who->pvt->pvt == op1)
2701                         op1->ignoredtmf = 1;
2702                 f = ast_read(who);
2703                 if (who->pvt->pvt == op0) 
2704                         op0->ignoredtmf = 0;
2705                 else if (who->pvt->pvt == op1)
2706                         op1->ignoredtmf = 0;
2707                 if (!f) {
2708                         *fo = NULL;
2709                         *rc = who;
2710                         if (slave && master)
2711                                 zt_unlink(slave, master, 1);
2712                         if (op0 == p0)
2713                                 zt_enable_ec(p0);
2714                         if (op1 == p1)
2715                                 zt_enable_ec(p1);
2716                         return 0;
2717                 }
2718                 if (f->frametype == AST_FRAME_DTMF) {
2719                         if (((who == c0) && (flags & AST_BRIDGE_DTMF_CHANNEL_0)) || 
2720                             ((who == c1) && (flags & AST_BRIDGE_DTMF_CHANNEL_1))) {
2721                                 *fo = f;
2722                                 *rc = who;
2723                                 if (slave && master)
2724                                         zt_unlink(slave, master, 1);
2725                                 return 0;
2726                         } else if ((who == c0) && p0->pulsedial) {
2727                                 ast_write(c1, f);
2728                         } else if ((who == c1) && p1->pulsedial) {
2729                                 ast_write(c0, f);
2730                         }
2731                 }
2732                 ast_frfree(f);
2733
2734                 /* Swap who gets priority */
2735                 cs[2] = cs[0];
2736                 cs[0] = cs[1];
2737                 cs[1] = cs[2];
2738         }
2739 }
2740
2741 static int zt_indicate(struct ast_channel *chan, int condition);
2742
2743 static int zt_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
2744 {
2745         struct zt_pvt *p = newchan->pvt->pvt;
2746         int x;
2747         ast_mutex_lock(&p->lock);
2748         ast_log(LOG_DEBUG, "New owner for channel %d is %s\n", p->channel, newchan->name);
2749         if (p->owner == oldchan) {
2750                 p->owner = newchan;
2751         }
2752         for (x=0;x<3;x++)
2753                 if (p->subs[x].owner == oldchan) {
2754                         if (!x)
2755                                 zt_unlink(NULL, p, 0);
2756                         p->subs[x].owner = newchan;
2757                 }
2758         if (newchan->_state == AST_STATE_RINGING) 
2759                 zt_indicate(newchan, AST_CONTROL_RINGING);
2760         update_conf(p);
2761         ast_mutex_unlock(&p->lock);
2762         return 0;
2763 }
2764
2765 static int zt_ring_phone(struct zt_pvt *p)
2766 {
2767         int x;
2768         int res;
2769         /* Make sure our transmit state is on hook */
2770         x = 0;
2771         x = ZT_ONHOOK;
2772         res = ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
2773         do {
2774                 x = ZT_RING;
2775                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
2776 #if 0
2777                 printf("Res: %d, error: %s\n", res, strerror(errno));
2778 #endif                                          
2779                 if (res) {
2780                         switch(errno) {
2781                         case EBUSY:
2782                         case EINTR:
2783                                 /* Wait just in case */
2784                                 usleep(10000);
2785                                 continue;
2786                         case EINPROGRESS:
2787                                 res = 0;
2788                                 break;
2789                         default:
2790                                 ast_log(LOG_WARNING, "Couldn't ring the phone: %s\n", strerror(errno));
2791                                 res = 0;
2792                         }
2793                 }
2794         } while (res);
2795         return res;
2796 }
2797
2798 static void *ss_thread(void *data);
2799
2800 static struct ast_channel *zt_new(struct zt_pvt *, int, int, int, int, int);
2801
2802 static int attempt_transfer(struct zt_pvt *p)
2803 {
2804         /* In order to transfer, we need at least one of the channels to
2805            actually be in a call bridge.  We can't conference two applications
2806            together (but then, why would we want to?) */
2807         if (p->subs[SUB_REAL].owner->bridge) {
2808                 /* The three-way person we're about to transfer to could still be in MOH, so
2809                    stop if now if appropriate */
2810                 if (p->subs[SUB_THREEWAY].owner->bridge)
2811                         ast_moh_stop(p->subs[SUB_THREEWAY].owner->bridge);
2812                 if (p->subs[SUB_THREEWAY].owner->_state == AST_STATE_RINGING) {
2813                         ast_indicate(p->subs[SUB_REAL].owner->bridge, AST_CONTROL_RINGING);
2814                 }
2815                 if (ast_channel_masquerade(p->subs[SUB_THREEWAY].owner, p->subs[SUB_REAL].owner->bridge)) {
2816                         ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
2817                                         p->subs[SUB_REAL].owner->bridge->name, p->subs[SUB_THREEWAY].owner->name);
2818                         return -1;
2819                 }
2820                 /* Orphan the channel */
2821                 unalloc_sub(p, SUB_THREEWAY);
2822         } else if (p->subs[SUB_THREEWAY].owner->bridge) {
2823                 if (p->subs[SUB_REAL].owner->_state == AST_STATE_RINGING) {
2824                         ast_indicate(p->subs[SUB_THREEWAY].owner->bridge, AST_CONTROL_RINGING);
2825                 }
2826                 ast_moh_stop(p->subs[SUB_THREEWAY].owner->bridge);
2827                 if (ast_channel_masquerade(p->subs[SUB_REAL].owner, p->subs[SUB_THREEWAY].owner->bridge)) {
2828                         ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
2829                                         p->subs[SUB_THREEWAY].owner->bridge->name, p->subs[SUB_REAL].owner->name);
2830                         return -1;
2831                 }
2832                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
2833                 unalloc_sub(p, SUB_THREEWAY);
2834                 /* Tell the caller not to hangup */
2835                 return 1;
2836         } else {
2837                 ast_log(LOG_DEBUG, "Neither %s nor %s are in a bridge, nothing to transfer\n",
2838                                         p->subs[SUB_REAL].owner->name, p->subs[SUB_THREEWAY].owner->name);
2839                 p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2840         }
2841         return 0;
2842 }
2843
2844 #ifdef ZAPATA_R2
2845 static struct ast_frame *handle_r2_event(struct zt_pvt *p, mfcr2_event_t *e, int index)
2846 {
2847         struct ast_frame *f;
2848         f = &p->subs[index].f;
2849         if (!p->r2) {
2850                 ast_log(LOG_WARNING, "Huh?  No R2 structure :(\n");
2851                 return NULL;
2852         }
2853         switch(e->e) {
2854         case MFCR2_EVENT_BLOCKED:
2855                 if (option_verbose > 2)
2856                         ast_verbose(VERBOSE_PREFIX_3 "Channel %d blocked\n", p->channel);
2857                 break;
2858         case MFCR2_EVENT_UNBLOCKED:
2859                 if (option_verbose > 2)
2860                         ast_verbose(VERBOSE_PREFIX_3 "Channel %d unblocked\n", p->channel);
2861                 break;
2862         case MFCR2_EVENT_CONFIG_ERR:
2863                 if (option_verbose > 2)
2864                         ast_verbose(VERBOSE_PREFIX_3 "Config error on channel %d\n", p->channel);
2865                 break;
2866         case MFCR2_EVENT_RING:
2867                 if (option_verbose > 2)
2868                         ast_verbose(VERBOSE_PREFIX_3 "Ring on channel %d\n", p->channel);
2869                 break;
2870         case MFCR2_EVENT_HANGUP:
2871                 if (option_verbose > 2)
2872                         ast_verbose(VERBOSE_PREFIX_3 "Hangup on channel %d\n", p->channel);
2873                 break;
2874         case MFCR2_EVENT_RINGING:
2875                 if (option_verbose > 2)
2876                         ast_verbose(VERBOSE_PREFIX_3 "Ringing on channel %d\n", p->channel);
2877                 break;
2878         case MFCR2_EVENT_ANSWER:
2879                 if (option_verbose > 2)
2880                         ast_verbose(VERBOSE_PREFIX_3 "Answer on channel %d\n", p->channel);
2881                 break;
2882         case MFCR2_EVENT_HANGUP_ACK:
2883                 if (option_verbose > 2)
2884                         ast_verbose(VERBOSE_PREFIX_3 "Hangup ACK on channel %d\n", p->channel);
2885                 break;
2886         case MFCR2_EVENT_IDLE:
2887                 if (option_verbose > 2)
2888                         ast_verbose(VERBOSE_PREFIX_3 "Idle on channel %d\n", p->channel);
2889                 break;
2890         default:
2891                 ast_log(LOG_WARNING, "Unknown MFC/R2 event %d\n", e->e);
2892                 break;
2893         }
2894         return f;
2895 }
2896
2897 static mfcr2_event_t *r2_get_event_bits(struct zt_pvt *p)
2898 {
2899         int x;
2900         int res;
2901         mfcr2_event_t *e;
2902         res = ioctl(p->subs[SUB_REAL].zfd, ZT_GETRXBITS, &x);
2903         if (res) {
2904                 ast_log(LOG_WARNING, "Unable to check received bits\n");
2905                 return NULL;
2906         }
2907         if (!p->r2) {
2908                 ast_log(LOG_WARNING, "Odd, no R2 structure on channel %d\n", p->channel);
2909                 return NULL;
2910         }
2911         e = mfcr2_cas_signaling_event(p->r2, x);
2912         return e;
2913 }
2914 #endif
2915
2916 static int check_for_conference(struct zt_pvt *p)
2917 {
2918         ZT_CONFINFO ci;
2919         /* Fine if we already have a master, etc */
2920         if (p->master || (p->confno > -1))
2921                 return 0;
2922         memset(&ci, 0, sizeof(ci));
2923         if (ioctl(p->subs[SUB_REAL].zfd, ZT_GETCONF, &ci)) {
2924                 ast_log(LOG_WARNING, "Failed to get conference info on channel %d\n", p->channel);
2925                 return 0;
2926         }
2927         /* If we have no master and don't have a confno, then 
2928            if we're in a conference, it's probably a MeetMe room or
2929            some such, so don't let us 3-way out! */
2930         if ((p->subs[SUB_REAL].curconf.confno != ci.confno) || (p->subs[SUB_REAL].curconf.confmode != ci.confmode)) {
2931                 if (option_verbose > 2) 
2932                         ast_verbose(VERBOSE_PREFIX_3 "Avoiding 3-way call when in an external conference\n");
2933                 return 1;
2934         }
2935         return 0;
2936 }
2937
2938 static int get_alarms(struct zt_pvt *p)
2939 {
2940         int res;
2941         ZT_SPANINFO zi;
2942         memset(&zi, 0, sizeof(zi));
2943         zi.spanno = p->span;
2944         res = ioctl(p->subs[SUB_REAL].zfd, ZT_SPANSTAT, &zi);
2945         if (res < 0) {
2946                 ast_log(LOG_WARNING, "Unable to determine alarm on channel %d\n", p->channel);
2947                 return 0;
2948         }
2949         return zi.alarms;
2950 }
2951                         
2952 static struct ast_frame *zt_handle_event(struct ast_channel *ast)
2953 {
2954         int res,x;
2955         int index;
2956         char *c;
2957         struct zt_pvt *p = ast->pvt->pvt;
2958         pthread_t threadid;
2959         pthread_attr_t attr;
2960         struct ast_channel *chan;
2961         pthread_attr_init(&attr);
2962         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
2963         index = zt_get_index(ast, p, 0);
2964         p->subs[index].f.frametype = AST_FRAME_NULL;
2965         p->subs[index].f.datalen = 0;
2966         p->subs[index].f.samples = 0;
2967         p->subs[index].f.mallocd = 0;
2968         p->subs[index].f.offset = 0;
2969         p->subs[index].f.src = "zt_handle_event";
2970         p->subs[index].f.data = NULL;
2971         if (index < 0)
2972                 return &p->subs[index].f;
2973         if (p->fake_event) {
2974                 res = p->fake_event;
2975                 p->fake_event = 0;
2976         } else
2977                 res = zt_get_event(p->subs[index].zfd);
2978         ast_log(LOG_DEBUG, "Got event %s(%d) on channel %d (index %d)\n", event2str(res), res, p->channel, index);
2979         if (res & (ZT_EVENT_PULSEDIGIT | ZT_EVENT_DTMFDIGIT)) {
2980                 if (res & ZT_EVENT_PULSEDIGIT)
2981                         p->pulsedial = 1;
2982                 else
2983                         p->pulsedial = 0;
2984                 ast_log(LOG_DEBUG, "Pulse dial '%c'\n", res & 0xff);
2985                 p->subs[index].f.frametype = AST_FRAME_DTMF;
2986                 p->subs[index].f.subclass = res & 0xff;
2987                 /* Return the captured digit */
2988                 return &p->subs[index].f;
2989         }
2990         switch(res) {
2991                 case ZT_EVENT_BITSCHANGED:
2992                         if (p->sig == SIG_R2) {
2993 #ifdef ZAPATA_R2
2994                                 struct ast_frame  *f = &p->subs[index].f;
2995                                 mfcr2_event_t *e;
2996                                 e = r2_get_event_bits(p)