Allow use of immediate=yes with EM / EM_W signalling
[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 <sys/signal.h>
39 #include <sys/select.h>
40 #include <errno.h>
41 #include <stdlib.h>
42 #include <stdint.h>
43 #include <unistd.h>
44 #include <sys/ioctl.h>
45 #include <linux/zaptel.h>
46 #include <math.h>
47 #include <tonezone.h>
48 #include <ctype.h>
49 #ifdef ZAPATA_PRI
50 #include <libpri.h>
51 #endif
52 #ifdef ZAPATA_R2
53 #include <libmfcr2.h>
54 #endif
55
56 #include "../asterisk.h"
57
58 /* 
59    XXX 
60    XXX   We definitely need to lock the private structure in zt_read and such 
61    XXX  
62  */
63
64
65 /*
66  * Define ZHONE_HACK to cause us to go off hook and then back on hook when
67  * the user hangs up to reset the state machine so ring works properly.
68  * This is used to be able to support kewlstart by putting the zhone in
69  * groundstart mode since their forward disconnect supervision is entirely
70  * broken even though their documentation says it isn't and their support
71  * is entirely unwilling to provide any assistance with their channel banks
72  * even though their web site says they support their products for life.
73  */
74
75 /* #define ZHONE_HACK */
76
77 /* Typically, how many rings before we should send Caller*ID */
78 #define DEFAULT_CIDRINGS 1
79
80 #define CHANNEL_PSEUDO -12
81
82 #define AST_LAW(p) (((p)->law == ZT_LAW_ALAW) ? AST_FORMAT_ALAW : AST_FORMAT_ULAW)
83
84 static char *desc = "Zapata Telephony"
85 #ifdef ZAPATA_PRI
86                " w/PRI"
87 #endif
88 #ifdef ZAPATA_R2
89                " w/R2"
90 #endif
91 ;
92
93 static char *tdesc = "Zapata Telephony Driver"
94 #ifdef ZAPATA_PRI
95                " w/PRI"
96 #endif
97 #ifdef ZAPATA_R2
98                " w/R2"
99 #endif
100 ;
101
102 static char *type = "Zap";
103 static char *typecompat = "Tor";        /* Retain compatibility with chan_tor */
104 static char *config = "zapata.conf";
105
106 #define SIG_EM          ZT_SIG_EM
107 #define SIG_EMWINK      (0x10000 | ZT_SIG_EM)
108 #define SIG_FEATD       (0x20000 | ZT_SIG_EM)
109 #define SIG_FEATDMF     (0x40000 | ZT_SIG_EM)
110 #define SIG_FEATB       (0x80000 | ZT_SIG_EM)
111 #define SIG_FXSLS       ZT_SIG_FXSLS
112 #define SIG_FXSGS       ZT_SIG_FXSGS
113 #define SIG_FXSKS       ZT_SIG_FXSKS
114 #define SIG_FXOLS       ZT_SIG_FXOLS
115 #define SIG_FXOGS       ZT_SIG_FXOGS
116 #define SIG_FXOKS       ZT_SIG_FXOKS
117 #define SIG_PRI         ZT_SIG_CLEAR
118 #define SIG_R2          ZT_SIG_CAS
119 #define SIG_SF          ZT_SIG_SF
120 #define SIG_SFWINK      (0x10000 | ZT_SIG_SF)
121 #define SIG_SF_FEATD    (0x20000 | ZT_SIG_SF)
122 #define SIG_SF_FEATDMF  (0x40000 | ZT_SIG_SF)
123 #define SIG_SF_FEATB    (0x80000 | ZT_SIG_SF)
124
125 #define NUM_SPANS       32
126 #define RESET_INTERVAL  3600    /* How often (in seconds) to reset unused channels */
127
128 #define CHAN_PSEUDO     -2
129
130 static char context[AST_MAX_EXTENSION] = "default";
131 static char callerid[256] = "";
132
133 static char language[MAX_LANGUAGE] = "";
134 static char musicclass[MAX_LANGUAGE] = "";
135
136 static int use_callerid = 1;
137
138 static int cur_signalling = -1;
139
140 static unsigned int cur_group = 0;
141 static unsigned int cur_callergroup = 0;
142 static unsigned int cur_pickupgroup = 0;
143 static int relaxdtmf = 0;
144
145 static int immediate = 0;
146
147 static int stripmsd = 0;
148
149 static int callwaiting = 0;
150
151 static int callwaitingcallerid = 0;
152
153 static int hidecallerid = 0;
154
155 static int callreturn = 0;
156
157 static int threewaycalling = 0;
158
159 static int transfer = 0;
160
161 static int cancallforward = 0;
162
163 static float rxgain = 0.0;
164
165 static float txgain = 0.0;
166
167 static int echocancel;
168
169 static int echocanbridged = 0;
170
171 static int busydetect = 0;
172
173 static int busycount = 3;
174
175 static int callprogress = 0;
176
177 static char accountcode[20] = "";
178
179 static char mailbox[AST_MAX_EXTENSION];
180
181 static int amaflags = 0;
182
183 static int adsi = 0;
184
185 #ifdef ZAPATA_PRI
186 static int minunused = 2;
187 static int minidle = 0;
188 static char idleext[AST_MAX_EXTENSION];
189 static char idledial[AST_MAX_EXTENSION];
190 #endif
191
192 /* Wait up to 16 seconds for first digit (FXO logic) */
193 static int firstdigittimeout = 16000;
194
195 /* How long to wait for following digits (FXO logic) */
196 static int gendigittimeout = 8000;
197
198 /* How long to wait for an extra digit, if there is an ambiguous match */
199 static int matchdigittimeout = 3000;
200
201 static int usecnt =0;
202 static pthread_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER;
203
204 /* Protect the interface list (of zt_pvt's) */
205 static pthread_mutex_t iflock = AST_MUTEX_INITIALIZER;
206
207 /* Protect the monitoring thread, so only one process can kill or start it, and not
208    when it's doing something critical. */
209 static pthread_mutex_t monlock = AST_MUTEX_INITIALIZER;
210
211 /* This is the thread for the monitor which checks for input on the channels
212    which are not currently in use.  */
213 static pthread_t monitor_thread = 0;
214
215 static int restart_monitor(void);
216
217 static int zt_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc);
218
219 static int zt_sendtext(struct ast_channel *c, char *text);
220
221 static inline int zt_get_event(int fd)
222 {
223         /* Avoid the silly zt_getevent which ignores a bunch of events */
224         int j;
225         if (ioctl(fd, ZT_GETEVENT, &j) == -1) return -1;
226         return j;
227 }
228
229 static inline int zt_wait_event(int fd)
230 {
231         /* Avoid the silly zt_waitevent which ignores a bunch of events */
232         int i,j=0;
233         i = ZT_IOMUX_SIGEVENT;
234         if (ioctl(fd, ZT_IOMUX, &i) == -1) return -1;
235         if (ioctl(fd, ZT_GETEVENT, &j) == -1) return -1;
236         return j;
237 }
238
239 /* Chunk size to read -- we use 20ms chunks to make things happy.  */   
240 #define READ_SIZE 160
241
242 #define MASK_AVAIL              (1 << 0)                /* Channel available for PRI use */
243 #define MASK_INUSE              (1 << 1)                /* Channel currently in use */
244
245 #define CALLWAITING_SILENT_SAMPLES      ( (300 * 8) / READ_SIZE) /* 300 ms */
246 #define CALLWAITING_REPEAT_SAMPLES      ( (10000 * 8) / READ_SIZE) /* 300 ms */
247 #define CIDCW_EXPIRE_SAMPLES            ( (500 * 8) / READ_SIZE) /* 500 ms */
248 #define MIN_MS_SINCE_FLASH                      ( (2000) )      /* 2000 ms */
249 #define RINGT                                           ( (8000 * 8) / READ_SIZE)
250
251 struct zt_pvt;
252
253
254 #ifdef ZAPATA_R2
255 static int r2prot = -1;
256 #endif
257
258
259 #ifdef ZAPATA_PRI
260 struct zt_pri {
261         pthread_t master;                       /* Thread of master */
262         pthread_mutex_t lock;           /* Mutex */
263         char idleext[AST_MAX_EXTENSION];                /* Where to idle extra calls */
264         char idlecontext[AST_MAX_EXTENSION];            /* What context to use for idle */
265         char idledial[AST_MAX_EXTENSION];               /* What to dial before dumping */
266         int minunused;                          /* Min # of channels to keep empty */
267         int minidle;                            /* Min # of "idling" calls to keep active */
268         int nodetype;                           /* Node type */
269         int switchtype;                         /* Type of switch to emulate */
270         int dialplan;                   /* Dialing plan */
271         int dchannel;                   /* What channel the dchannel is on */
272         int channels;                   /* Num of chans in span (31 or 24) */
273         struct pri *pri;
274         int debug;
275         int fd;
276         int up;
277         int offset;
278         int span;
279         int chanmask[32];                       /* Channel status */
280         int resetting;
281         int resetchannel;
282         time_t lastreset;
283         struct zt_pvt *pvt[32]; /* Member channel pvt structs */
284         struct zt_channel *chan[32];    /* Channels on each line */
285 };
286
287
288 static struct zt_pri pris[NUM_SPANS];
289
290 static int pritype = PRI_CPE;
291
292 #if 0
293 #define DEFAULT_PRI_DEBUG (PRI_DEBUG_Q931_DUMP | PRI_DEBUG_Q921_DUMP | PRI_DEBUG_Q921_RAW | PRI_DEBUG_Q921_STATE)
294 #else
295 #define DEFAULT_PRI_DEBUG 0
296 #endif
297
298 static inline void pri_rel(struct zt_pri *pri)
299 {
300         ast_pthread_mutex_unlock(&pri->lock);
301 }
302
303 static int switchtype = PRI_SWITCH_NI2;
304 static int dialplan = PRI_NATIONAL_ISDN + 1;
305
306 #endif
307
308 #define SUB_REAL                0                       /* Active call */
309 #define SUB_CALLWAIT    1                       /* Call-Waiting call on hold */
310 #define SUB_THREEWAY    2                       /* Three-way call */
311
312 static char *subnames[] = {
313         "Real",
314         "Callwait",
315         "Threeway"
316 };
317
318 struct zt_subchannel {
319         int zfd;
320         struct ast_channel *owner;
321         int chan;
322         short buffer[AST_FRIENDLY_OFFSET/2 + READ_SIZE];
323         struct ast_frame f;             /* One frame for each channel.  How did this ever work before? */
324         int needringing;
325         int needcallerid;
326         int needanswer;
327         int linear;
328         int inthreeway;
329         int curconfno;                  /* What conference we're currently in */
330 };
331
332 #define CONF_USER_REAL          (1 << 0)
333 #define CONF_USER_THIRDCALL     (1 << 1)
334
335 #define MAX_SLAVES      4
336
337 static struct zt_pvt {
338         pthread_mutex_t lock;
339         struct ast_channel *owner;      /* Our current active owner (if applicable) */
340                 /* Up to three channels can be associated with this call */
341                 
342         struct zt_subchannel sub_unused;        /* Just a safety precaution */
343         struct zt_subchannel subs[3];   /* Sub-channels */
344         struct zt_confinfo saveconf;    /* Saved conference info */
345
346         struct zt_pvt *slaves[MAX_SLAVES];      /* Slave to us (follows our conferencing) */
347         struct zt_pvt *master;  /* Master to us (we follow their conferencing) */
348         int inconference;               /* If our real should be in the conference */
349         
350         int sig;                                        /* Signalling style */
351         int radio;                              /* radio type */
352         int firstradio;                         /* first radio flag */
353         float rxgain;
354         float txgain;
355         struct zt_pvt *next;                    /* Next channel in list */
356         char context[AST_MAX_EXTENSION];
357         char exten[AST_MAX_EXTENSION];
358         char language[MAX_LANGUAGE];
359         char musicclass[MAX_LANGUAGE];
360         char callerid[AST_MAX_EXTENSION];
361         char lastcallerid[AST_MAX_EXTENSION];
362         char callwaitcid[AST_MAX_EXTENSION];
363         char rdnis[AST_MAX_EXTENSION];
364         unsigned int group;
365         int law;
366         int confno;                                     /* Our conference */
367         int confusers;                          /* Who is using our conference */
368         int propconfno;                         /* Propagated conference number */
369         unsigned int callgroup;
370         unsigned int pickupgroup;
371         int immediate;                          /* Answer before getting digits? */
372         int channel;                            /* Channel Number */
373         int span;                                       /* Span number */
374         int dialing;
375         int dialednone;
376         int use_callerid;                       /* Whether or not to use caller id on this channel */
377         int hidecallerid;
378         int callreturn;
379         int permhidecallerid;           /* Whether to hide our outgoing caller ID or not */
380         int callwaitingrepeat;          /* How many samples to wait before repeating call waiting */
381         int cidcwexpire;                        /* When to expire our muting for CID/CW */
382         unsigned char *cidspill;
383         int cidpos;
384         int cidlen;
385         int ringt;
386         int stripmsd;
387         int callwaiting;
388         int callwaitcas;
389         int callwaitrings;
390         int echocancel;
391         int echocanbridged;
392         int echocanon;
393         int permcallwaiting;
394         int callwaitingcallerid;
395         int threewaycalling;
396         int transfer;
397         int digital;
398         int outgoing;
399         int dnd;
400         int busydetect;
401         int busycount;
402         int callprogress;
403         struct timeval flashtime;       /* Last flash-hook time */
404         struct ast_dsp *dsp;
405         int cref;                                       /* Call reference number */
406         ZT_DIAL_OPERATION dop;
407         int destroy;
408         int ignoredtmf;                         
409         int inalarm;
410         char accountcode[20];           /* Account code */
411         int amaflags;                           /* AMA Flags */
412         char didtdd;                    /* flag to say its done it once */
413         struct tdd_state *tdd;          /* TDD flag */
414         int adsi;
415         int cancallforward;
416         char call_forward[AST_MAX_EXTENSION];
417         char mailbox[AST_MAX_EXTENSION];
418         int onhooktime;
419         int msgstate;
420         
421         int confirmanswer;              /* Wait for '#' to confirm answer */
422         int distinctivering;    /* Which distinctivering to use */
423         int cidrings;                   /* Which ring to deliver CID on */
424         
425         int faxhandled;                 /* Has a fax tone already been handled? */
426         
427         char mate;                      /* flag to say its in MATE mode */
428         int pulsedial;          /* whether a pulse dial phone is detected */
429         int dtmfrelax;          /* whether to run in relaxed DTMF mode */
430 #ifdef ZAPATA_PRI
431         struct zt_pri *pri;
432         q931_call *call;
433         int isidlecall;
434         int resetting;
435         int prioffset;
436         int alreadyhungup;
437 #ifdef PRI_EVENT_PROCEEDING
438         int proceeding;
439 #endif
440 #endif  
441 #ifdef ZAPATA_R2
442         int r2prot;
443         mfcr2_t *r2;
444         int hasr2call;
445         int r2blocked;
446         int sigchecked;
447 #endif  
448 } *iflist = NULL;
449
450 #ifdef ZAPATA_PRI
451 static inline int pri_grab(struct zt_pvt *pvt, struct zt_pri *pri)
452 {
453         int res;
454         /* Grab the lock first */
455         do {
456             res = pthread_mutex_trylock(&pri->lock);
457                 if (res) {
458                         ast_pthread_mutex_unlock(&pvt->lock);
459                         /* Release the lock and try again */
460                         usleep(1);
461                         ast_pthread_mutex_lock(&pvt->lock);
462                 }
463         } while(res);
464         /* Then break the select */
465         pthread_kill(pri->master, SIGURG);
466         return 0;
467 }
468 #endif
469
470 static struct zt_ring_cadence cadences[] = {
471         { { 125, 125, 2000, 4000 } },                   /* Quick chirp followed by normal ring */
472         { { 250, 250, 500, 1000, 250, 250, 500, 4000 } }, /* British style ring */
473         { { 125, 125, 125, 125, 125, 4000 } },  /* Three short bursts */
474         { { 1000, 500, 2500, 5000 } },  /* Long ring */
475 };
476
477 static int cidrings[] = {
478         2,                                                                              /* Right after first long ring */
479         4,                                                                              /* Right after long part */
480         3,                                                                              /* After third chirp */
481         2,                                                                              /* Second spell */
482 };
483
484 #define NUM_CADENCE (sizeof(cadences) / sizeof(cadences[0]))
485
486 #define ISTRUNK(p) ((p->sig == SIG_FXSLS) || (p->sig == SIG_FXSKS) || \
487                         (p->sig == SIG_FXSGS) || (p->sig == SIG_PRI))
488
489 #define CANBUSYDETECT(p) (ISTRUNK(p) || (p->sig & (SIG_EM | SIG_SF)) /* || (p->sig & __ZT_SIG_FXO) */)
490 #define CANPROGRESSDETECT(p) (ISTRUNK(p) || (p->sig & (SIG_EM | SIG_SF)) /* || (p->sig & __ZT_SIG_FXO) */)
491
492 static int zt_get_index(struct ast_channel *ast, struct zt_pvt *p, int nullok)
493 {
494         int res;
495         if (p->subs[0].owner == ast)
496                 res = 0;
497         else if (p->subs[1].owner == ast)
498                 res = 1;
499         else if (p->subs[2].owner == ast)
500                 res = 2;
501         else {
502                 res = -1;
503                 if (!nullok)
504                         ast_log(LOG_WARNING, "Unable to get index, and nullok is not asserted\n");
505         }
506         return res;
507 }
508
509 static void swap_subs(struct zt_pvt *p, int a, int b)
510 {
511         int tchan;
512         int tinthreeway;
513         struct ast_channel *towner;
514         struct ast_frame null = { AST_FRAME_NULL, };
515
516         ast_log(LOG_DEBUG, "Swapping %d and %d\n", a, b);
517
518         tchan = p->subs[a].chan;
519         towner = p->subs[a].owner;
520         tinthreeway = p->subs[a].inthreeway;
521
522         p->subs[a].chan = p->subs[b].chan;
523         p->subs[a].owner = p->subs[b].owner;
524         p->subs[a].inthreeway = p->subs[b].inthreeway;
525
526         p->subs[b].chan = tchan;
527         p->subs[b].owner = towner;
528         p->subs[b].inthreeway = tinthreeway;
529
530         if (p->subs[a].owner) {
531                 p->subs[a].owner->fds[0] = p->subs[a].zfd;
532                 ast_queue_frame(p->subs[a].owner, &null, 0);
533         }
534         if (p->subs[b].owner) {
535                 p->subs[b].owner->fds[0] = p->subs[b].zfd;
536                 ast_queue_frame(p->subs[b].owner, &null, 0);
537         }
538         
539 }
540
541 static int zt_open(char *fn)
542 {
543         int fd;
544         int isnum;
545         int chan = 0;
546         int bs;
547         int x;
548         isnum = 1;
549         for (x=0;x<strlen(fn);x++) {
550                 if (!isdigit(fn[x])) {
551                         isnum = 0;
552                         break;
553                 }
554         }
555         if (isnum) {
556                 chan = atoi(fn);
557                 if (chan < 1) {
558                         ast_log(LOG_WARNING, "Invalid channel number '%s'\n", fn);
559                         return -1;
560                 }
561                 fn = "/dev/zap/channel";
562         }
563         fd = open(fn, O_RDWR | O_NONBLOCK);
564         if (fd < 0) {
565                 ast_log(LOG_WARNING, "Unable to open '%s': %s\n", fn, strerror(errno));
566                 return -1;
567         }
568         if (chan) {
569                 if (ioctl(fd, ZT_SPECIFY, &chan)) {
570                         x = errno;
571                         close(fd);
572                         errno = x;
573                         ast_log(LOG_WARNING, "Unable to specify channel %d: %s\n", chan, strerror(errno));
574                         return -1;
575                 }
576         }
577         bs = READ_SIZE;
578         if (ioctl(fd, ZT_SET_BLOCKSIZE, &bs) == -1) return -1;
579         return fd;
580 }
581
582 static void zt_close(int fd)
583 {
584         close(fd);
585 }
586
587 int zt_setlinear(int zfd, int linear)
588 {
589         int res;
590         res = ioctl(zfd, ZT_SETLINEAR, &linear);
591         if (res)
592                 return res;
593         return 0;
594 }
595
596
597 int zt_setlaw(int zfd, int law)
598 {
599         int res;
600         res = ioctl(zfd, ZT_SETLAW, &law);
601         if (res)
602                 return res;
603         return 0;
604 }
605
606 static int alloc_sub(struct zt_pvt *p, int x)
607 {
608         ZT_BUFFERINFO bi;
609         int res;
610         if (p->subs[x].zfd < 0) {
611                 p->subs[x].zfd = zt_open("/dev/zap/pseudo");
612                 if (p->subs[x].zfd > -1) {
613                         res = ioctl(p->subs[x].zfd, ZT_GET_BUFINFO, &bi);
614                         if (!res) {
615                                 bi.txbufpolicy = ZT_POLICY_IMMEDIATE;
616                                 bi.rxbufpolicy = ZT_POLICY_IMMEDIATE;
617                                 bi.numbufs = 4;
618                                 res = ioctl(p->subs[x].zfd, ZT_SET_BUFINFO, &bi);
619                                 if (res < 0) {
620                                         ast_log(LOG_WARNING, "Unable to set buffer policy on channel %d\n", x);
621                                 }
622                         } else 
623                                 ast_log(LOG_WARNING, "Unable to check buffer policy on channel %d\n", x);
624                         if (ioctl(p->subs[x].zfd, ZT_CHANNO, &p->subs[x].chan) == 1) {
625                                 ast_log(LOG_WARNING,"Unable to get channel number for pseudo channel on FD %d\n",p->subs[x].zfd);
626                                 zt_close(p->subs[x].zfd);
627                                 p->subs[x].zfd = -1;
628                                 return -1;
629                         }
630                         if (option_debug)
631                                 ast_log(LOG_DEBUG, "Allocated %s subchannel on FD %d channel %d\n", subnames[x], p->subs[x].zfd, p->subs[x].chan);
632                         return 0;
633                 } else
634                         ast_log(LOG_WARNING, "Unable to open pseudo channel: %s\n", strerror(errno));
635                 return -1;
636         }
637         ast_log(LOG_WARNING, "%s subchannel of %d already in use\n", subnames[x], p->channel);
638         return -1;
639 }
640
641 static int unalloc_sub(struct zt_pvt *p, int x)
642 {
643         if (!x) {
644                 ast_log(LOG_WARNING, "Trying to unalloc the real channel %d?!?\n", p->channel);
645                 return -1;
646         }
647         ast_log(LOG_DEBUG, "Released sub %d of channel %d\n", x, p->channel);
648         if (p->subs[x].zfd > -1) {
649                 zt_close(p->subs[x].zfd);
650         }
651         p->subs[x].zfd = -1;
652         p->subs[x].linear = 0;
653         p->subs[x].chan = 0;
654         p->subs[x].owner = NULL;
655         p->subs[x].inthreeway = 0;
656         p->subs[x].curconfno = -1;
657         return 0;
658 }
659
660 static int zt_digit(struct ast_channel *ast, char digit)
661 {
662         ZT_DIAL_OPERATION zo;
663         struct zt_pvt *p;
664         int res = 0;
665         int index;
666         p = ast->pvt->pvt;
667         index = zt_get_index(ast, p, 0);
668         if (index == SUB_REAL) {
669 #ifdef ZAPATA_PRI
670 #ifdef PRI_EVENT_PROCEEDING
671                 if (p->sig == SIG_PRI && ast->_state == AST_STATE_DIALING && !p->proceeding) {
672 #else
673                 if (p->sig == SIG_PRI && ast->_state == AST_STATE_DIALING) {
674 #endif
675                         pri_information(p->pri->pri,p->call,digit);
676                 } else {
677 #else
678                 {
679 #endif
680                         zo.op = ZT_DIAL_OP_APPEND;
681                         zo.dialstr[0] = 'T';
682                         zo.dialstr[1] = digit;
683                         zo.dialstr[2] = 0;
684                         if ((res = ioctl(p->subs[SUB_REAL].zfd, ZT_DIAL, &zo)))
685                                 ast_log(LOG_WARNING, "Couldn't dial digit %c\n", digit);
686                         else
687                                 p->dialing = 1;
688                 }
689         }
690         
691         return res;
692 }
693
694 static char *events[] = {
695         "No event",
696         "On hook",
697         "Ring/Answered",
698         "Wink/Flash",
699         "Alarm",
700         "No more alarm",
701                 "HDLC Abort",
702                 "HDLC Overrun",
703                 "HDLC Bad FCS",
704                 "Dial Complete",
705                 "Ringer On",
706                 "Ringer Off",
707                 "Hook Transition Complete",
708                 "Bits Changed",
709                 "Pulse Start"
710 };
711
712 static struct {
713         int alarm;
714         char *name;
715 } alarms[] = {
716         { ZT_ALARM_RED, "Red Alarm" },
717         { ZT_ALARM_YELLOW, "Yellow Alarm" },
718         { ZT_ALARM_BLUE, "Blue Alarm" },
719         { ZT_ALARM_RECOVER, "Recovering" },
720         { ZT_ALARM_LOOPBACK, "Loopback" },
721         { ZT_ALARM_NOTOPEN, "Not Open" },
722         { ZT_ALARM_NONE, "None" },
723 };
724
725 static char *alarm2str(int alarm)
726 {
727         int x;
728         for (x=0;x<sizeof(alarms) / sizeof(alarms[0]); x++) {
729                 if (alarms[x].alarm & alarm)
730                         return alarms[x].name;
731         }
732         return alarm ? "Unknown Alarm" : "No Alarm";
733 }
734
735 static char *event2str(int event)
736 {
737         static char buf[256];
738         if ((event < 15) && (event > -1))
739                 return events[event];
740         sprintf(buf, "Event %d", event);
741         return buf;
742 }
743
744 #ifdef ZAPATA_R2
745 static int str2r2prot(char *swtype)
746 {
747     if (!strcasecmp(swtype, "ar"))
748         return MFCR2_PROT_ARGENTINA;
749     /*endif*/
750     if (!strcasecmp(swtype, "cn"))
751         return MFCR2_PROT_CHINA;
752     /*endif*/
753     if (!strcasecmp(swtype, "kr"))
754         return MFCR2_PROT_KOREA;
755     /*endif*/
756     return -1;
757 }
758 #endif
759
760 static char *sig2str(int sig)
761 {
762         static char buf[256];
763         switch(sig) {
764         case SIG_EM:
765                 return "E & M Immediate";
766         case SIG_EMWINK:
767                 return "E & M Wink";
768         case SIG_FEATD:
769                 return "Feature Group D (DTMF)";
770         case SIG_FEATDMF:
771                 return "Feature Group D (MF)";
772         case SIG_FEATB:
773                 return "Feature Group B (MF)";
774         case SIG_FXSLS:
775                 return "FXS Loopstart";
776         case SIG_FXSGS:
777                 return "FXS Groundstart";
778         case SIG_FXSKS:
779                 return "FXS Kewlstart";
780         case SIG_FXOLS:
781                 return "FXO Loopstart";
782         case SIG_FXOGS:
783                 return "FXO Groundstart";
784         case SIG_FXOKS:
785                 return "FXO Kewlstart";
786         case SIG_PRI:
787                 return "PRI Signalling";
788         case SIG_R2:
789                 return "R2 Signalling";
790         case SIG_SF:
791                 return "SF (Tone) Signalling Immediate";
792         case SIG_SFWINK:
793                 return "SF (Tone) Signalling Wink";
794         case SIG_SF_FEATD:
795                 return "SF (Tone) Signalling with Feature Group D (DTMF)";
796         case SIG_SF_FEATDMF:
797                 return "SF (Tone) Signallong with Feature Group D (MF)";
798         case SIG_SF_FEATB:
799                 return "SF (Tone) Signalling with Feature Group B (MF)";
800         case 0:
801                 return "Pseudo Signalling";
802         default:
803                 snprintf(buf, sizeof(buf), "Unknown signalling %d", sig);
804                 return buf;
805         }
806 }
807
808 static int conf_add(int *confno, struct zt_subchannel *c, int index)
809 {
810         /* If the conference already exists, and we're already in it
811            don't bother doing anything */
812         ZT_CONFINFO zi;
813         if ((*confno > 0) && (c->curconfno == *confno))
814                 return 0; 
815         if (c->curconfno > 0) {
816                 ast_log(LOG_WARNING, "Subchannel %d is already in conference %d, moving to %d\n", c->zfd, c->curconfno, *confno);
817         }
818         if (c->zfd < 0)
819                 return 0;
820         memset(&zi, 0, sizeof(zi));
821         zi.chan = 0;
822         zi.confno = *confno;
823         if (!index) {
824                 /* Real-side and pseudo-side both participate in conference */
825                 zi.confmode = ZT_CONF_REALANDPSEUDO | ZT_CONF_TALKER | ZT_CONF_LISTENER |
826                                                         ZT_CONF_PSEUDO_TALKER | ZT_CONF_PSEUDO_LISTENER;
827         } else
828                 zi.confmode = ZT_CONF_CONF | ZT_CONF_TALKER | ZT_CONF_LISTENER;
829         if (ioctl(c->zfd, ZT_SETCONF, &zi)) {
830                 ast_log(LOG_WARNING, "Failed to add %d to conference %d\n", c->zfd, *confno);
831                 return -1;
832         }
833         c->curconfno = zi.confno;
834         *confno = zi.confno;
835         ast_log(LOG_DEBUG, "Added %d to conference %d\n", c->zfd, *confno);
836         return 0;
837 }
838
839 static int conf_del(int *confno, struct zt_subchannel *c, int index)
840 {
841         ZT_CONFINFO zi;
842                 /* Can't delete from this conference if it's not 0 */
843         if ((*confno < 1) ||
844                 /* Can't delete if there's no zfd */
845                 (c->zfd < 0) ||
846                 /* Don't delete from the conference if it's not our conference */
847                 (*confno != c->curconfno) 
848                 /* Don't delete if we don't think it's conferenced at all (implied) */
849                 ) return 0;
850         memset(&zi, 0, sizeof(zi));
851         zi.chan = 0;
852         zi.confno = 0;
853         zi.confmode = 0;
854         if (ioctl(c->zfd, ZT_SETCONF, &zi)) {
855                 ast_log(LOG_WARNING, "Failed to drop %d from conference %d\n", c->zfd, *confno);
856                 return -1;
857         }
858         c->curconfno = -1;
859         ast_log(LOG_DEBUG, "Removed %d from conference %d\n", c->zfd, *confno);
860         return 0;
861 }
862
863 static int update_conf(struct zt_pvt *p)
864 {
865         int needconf = 0;
866         int x;
867         /* Update conference state in a stateless fashion */
868         /* Start with the obvious, general stuff */
869         for (x=0;x<3;x++) {
870                 if ((p->subs[x].zfd > -1) && p->subs[x].inthreeway) {
871                         conf_add(&p->confno, &p->subs[x], x);
872                         needconf++;
873                 } else {
874                         conf_del(&p->confno, &p->subs[x], x);
875                 }
876         }
877         /* If we have a slave, add him to our conference now */
878         for (x=0;x<MAX_SLAVES;x++) {
879                 if (p->slaves[x]) {
880                         conf_add(&p->confno, &p->slaves[x]->subs[SUB_REAL], SUB_REAL);
881                         needconf++;
882                 }
883         }
884         /* If we're supposed to be in there, do so now */
885         if (p->inconference && !p->subs[SUB_REAL].inthreeway) {
886                 conf_add(&p->confno, &p->subs[SUB_REAL], SUB_REAL);
887                 needconf++;
888         }
889         /* If we have a master, add ourselves to his conference */
890         if (p->master) 
891                 conf_add(&p->master->confno, &p->subs[SUB_REAL], SUB_REAL);
892         if (!needconf) {
893                 /* Nobody is left (or should be left) in our conference.  
894                    Kill it.  */
895                 p->confno = -1;
896         }
897         ast_log(LOG_DEBUG, "Updated conferencing on %d, with %d conference users\n", p->channel, needconf);
898         return 0;
899 }
900
901 static void zt_enable_ec(struct zt_pvt *p)
902 {
903         int x;
904         int res;
905         if (p->echocanon) {
906                 ast_log(LOG_DEBUG, "Echo cancellation already on\n");
907                 return;
908         }
909         if (p && p->echocancel) {
910                 if (p->sig == SIG_PRI) {
911                         x = 1;
912                         res = ioctl(p->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &x);
913                         if (res)
914                                 ast_log(LOG_WARNING, "Unable to enable echo cancellation on channel %d\n", p->channel);
915                 }
916                 x = p->echocancel;
917                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_ECHOCANCEL, &x);
918                 if (res) 
919                         ast_log(LOG_WARNING, "Unable to enable echo cancellation on channel %d\n", p->channel);
920                 else {
921                         p->echocanon = 1;
922                         ast_log(LOG_DEBUG, "Enabled echo cancellation on channel %d\n", p->channel);
923                 }
924         } else
925                 ast_log(LOG_DEBUG, "No echocancellation requested\n");
926 }
927
928 static void zt_disable_ec(struct zt_pvt *p)
929 {
930         int x;
931         int res;
932         if (p->echocancel) {
933                 x = 0;
934                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_ECHOCANCEL, &x);
935                 if (res) 
936                         ast_log(LOG_WARNING, "Unable to disable echo cancellation on channel %d\n", p->channel);
937                 else
938                         ast_log(LOG_DEBUG, "disabled echo cancellation on channel %d\n", p->channel);
939         }
940         p->echocanon = 0;
941 }
942
943 int set_actual_gain(int fd, int chan, float rxgain, float txgain, int law)
944 {
945         struct  zt_gains g;
946         float ltxgain;
947         float lrxgain;
948         int j,k;
949         g.chan = chan;
950         if ((rxgain != 0.0)  || (txgain != 0.0)) {
951                 /* caluculate linear value of tx gain */
952                 ltxgain = pow(10.0,txgain / 20.0);
953                 /* caluculate linear value of rx gain */
954                 lrxgain = pow(10.0,rxgain / 20.0);
955                 if (law == ZT_LAW_ALAW) {
956                         for (j=0;j<256;j++) {
957                                 k = (int)(((float)AST_ALAW(j)) * lrxgain);
958                                 if (k > 32767) k = 32767;
959                                 if (k < -32767) k = -32767;
960                                 g.rxgain[j] = AST_LIN2A(k);
961                                 k = (int)(((float)AST_ALAW(j)) * ltxgain);
962                                 if (k > 32767) k = 32767;
963                                 if (k < -32767) k = -32767;
964                                 g.txgain[j] = AST_LIN2A(k);
965                         }
966                 } else {
967                         for (j=0;j<256;j++) {
968                                 k = (int)(((float)AST_MULAW(j)) * lrxgain);
969                                 if (k > 32767) k = 32767;
970                                 if (k < -32767) k = -32767;
971                                 g.rxgain[j] = AST_LIN2MU(k);
972                                 k = (int)(((float)AST_MULAW(j)) * ltxgain);
973                                 if (k > 32767) k = 32767;
974                                 if (k < -32767) k = -32767;
975                                 g.txgain[j] = AST_LIN2MU(k);
976                         }
977                 }
978         } else {
979                 for (j=0;j<256;j++) {
980                         g.rxgain[j] = j;
981                         g.txgain[j] = j;
982                 }
983         }
984                 
985           /* set 'em */
986         return(ioctl(fd,ZT_SETGAINS,&g));
987 }
988
989 static inline int zt_set_hook(int fd, int hs)
990 {
991         int x, res;
992         x = hs;
993         res = ioctl(fd, ZT_HOOK, &x);
994         if (res < 0) 
995         {
996                 if (errno == EINPROGRESS) return 0;
997                 ast_log(LOG_WARNING, "zt hook failed: %s\n", strerror(errno));
998         }
999         return res;
1000 }
1001
1002 static inline int zt_confmute(struct zt_pvt *p, int muted)
1003 {
1004         int x, y, res;
1005         x = muted;
1006         if (p->sig == SIG_PRI) {
1007                 y = 1;
1008                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &y);
1009                 if (res)
1010                         ast_log(LOG_WARNING, "Unable to set audio mode on '%d'\n", p->channel);
1011         }
1012         res = ioctl(p->subs[SUB_REAL].zfd, ZT_CONFMUTE, &x);
1013         if (res < 0) 
1014                 ast_log(LOG_WARNING, "zt confmute(%d) failed on channel %d: %s\n", muted, p->channel, strerror(errno));
1015         return res;
1016 }
1017
1018 static int save_conference(struct zt_pvt *p)
1019 {
1020         struct zt_confinfo c;
1021         int res;
1022         if (p->saveconf.confmode) {
1023                 ast_log(LOG_WARNING, "Can't save conference -- already in use\n");
1024                 return -1;
1025         }
1026         p->saveconf.chan = 0;
1027         res = ioctl(p->subs[SUB_REAL].zfd, ZT_GETCONF, &p->saveconf);
1028         if (res) {
1029                 ast_log(LOG_WARNING, "Unable to get conference info: %s\n", strerror(errno));
1030                 p->saveconf.confmode = 0;
1031                 return -1;
1032         }
1033         c.chan = 0;
1034         c.confno = 0;
1035         c.confmode = ZT_CONF_NORMAL;
1036         res = ioctl(p->subs[SUB_REAL].zfd, ZT_SETCONF, &c);
1037         if (res) {
1038                 ast_log(LOG_WARNING, "Unable to set conference info: %s\n", strerror(errno));
1039                 return -1;
1040         }
1041         if (option_debug)
1042                 ast_log(LOG_DEBUG, "Disabled conferencing\n");
1043         return 0;
1044 }
1045
1046 static int restore_conference(struct zt_pvt *p)
1047 {
1048         int res;
1049         if (p->saveconf.confmode) {
1050                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_SETCONF, &p->saveconf);
1051                 p->saveconf.confmode = 0;
1052                 if (res) {
1053                         ast_log(LOG_WARNING, "Unable to restore conference info: %s\n", strerror(errno));
1054                         return -1;
1055                 }
1056         }
1057         if (option_debug)
1058                 ast_log(LOG_DEBUG, "Restored conferencing\n");
1059         return 0;
1060 }
1061
1062 static int send_callerid(struct zt_pvt *p);
1063
1064 int send_cwcidspill(struct zt_pvt *p)
1065 {
1066         p->callwaitcas = 0;
1067         p->cidcwexpire = 0;
1068         p->cidspill = malloc(MAX_CALLERID_SIZE);
1069         if (p->cidspill) {
1070                 memset(p->cidspill, 0x7f, MAX_CALLERID_SIZE);
1071                 p->cidlen = ast_callerid_callwaiting_generate(p->cidspill, p->callwaitcid, AST_LAW(p));
1072                 /* Make sure we account for the end */
1073                 p->cidlen += READ_SIZE * 4;
1074                 p->cidpos = 0;
1075                 send_callerid(p);
1076                 if (option_verbose > 2)
1077                         ast_verbose(VERBOSE_PREFIX_3 "CPE supports Call Waiting Caller*ID.  Sending '%s'\n", p->callwaitcid);
1078         } else return -1;
1079         return 0;
1080 }
1081
1082 static int has_voicemail(struct zt_pvt *p)
1083 {
1084
1085         return ast_app_has_voicemail(p->mailbox);
1086 }
1087
1088 static int send_callerid(struct zt_pvt *p)
1089 {
1090         /* Assumes spill in p->cidspill, p->cidlen in length and we're p->cidpos into it */
1091         int res;
1092         /* Take out of linear mode if necessary */
1093         if (p->subs[SUB_REAL].linear) {
1094                 p->subs[SUB_REAL].linear = 0;
1095                 zt_setlinear(p->subs[SUB_REAL].zfd, 0);
1096         }
1097         while(p->cidpos < p->cidlen) {
1098                 res = write(p->subs[SUB_REAL].zfd, p->cidspill + p->cidpos, p->cidlen - p->cidpos);
1099                 if (res < 0) {
1100                         if (errno == EAGAIN)
1101                                 return 0;
1102                         else {
1103                                 ast_log(LOG_WARNING, "write failed: %s\n", strerror(errno));
1104                                 return -1;
1105                         }
1106                 }
1107                 if (!res)
1108                         return 0;
1109                 p->cidpos += res;
1110         }
1111         free(p->cidspill);
1112         p->cidspill = NULL;
1113         if (p->callwaitcas) {
1114                 /* Wait for CID/CW to expire */
1115                 p->cidcwexpire = CIDCW_EXPIRE_SAMPLES;
1116         } else
1117                 restore_conference(p);
1118         return 0;
1119 }
1120
1121 static int zt_callwait(struct ast_channel *ast)
1122 {
1123         struct zt_pvt *p = ast->pvt->pvt;
1124         p->callwaitingrepeat = CALLWAITING_REPEAT_SAMPLES;
1125         if (p->cidspill) {
1126                 ast_log(LOG_WARNING, "Spill already exists?!?\n");
1127                 free(p->cidspill);
1128         }
1129         p->cidspill = malloc(2400 /* SAS */ + 680 /* CAS */ + READ_SIZE * 4);
1130         if (p->cidspill) {
1131                 save_conference(p);
1132                 /* Silence */
1133                 memset(p->cidspill, 0x7f, 2400 + 600 + READ_SIZE * 4);
1134                 if (!p->callwaitrings && p->callwaitingcallerid) {
1135                         ast_gen_cas(p->cidspill, 1, 2400 + 680, AST_LAW(p));
1136                         p->callwaitcas = 1;
1137                         p->cidlen = 2400 + 680 + READ_SIZE * 4;
1138                 } else {
1139                         ast_gen_cas(p->cidspill, 1, 2400, AST_LAW(p));
1140                         p->callwaitcas = 0;
1141                         p->cidlen = 2400 + READ_SIZE * 4;
1142                 }
1143                 p->cidpos = 0;
1144                 send_callerid(p);
1145         } else {
1146                 ast_log(LOG_WARNING, "Unable to create SAS/CAS spill\n");
1147                 return -1;
1148         }
1149         return 0;
1150 }
1151
1152 static int zt_call(struct ast_channel *ast, char *rdest, int timeout)
1153 {
1154         struct zt_pvt *p = ast->pvt->pvt;
1155         int x, res, index;
1156         char *c, *n, *l;
1157         char *s;
1158         char callerid[256];
1159         char dest[256];
1160         strncpy(dest, rdest, sizeof(dest) - 1);
1161         if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
1162                 ast_log(LOG_WARNING, "zt_call called on %s, neither down nor reserved\n", ast->name);
1163                 return -1;
1164         }
1165         p->dialednone = 0;
1166         if (p->radio)  /* if a radio channel, up immediately */
1167         {
1168                 /* Special pseudo -- automatically up */
1169                 ast_setstate(ast, AST_STATE_UP); 
1170                 return 0;
1171         }
1172         x = ZT_FLUSH_READ | ZT_FLUSH_WRITE;
1173         res = ioctl(p->subs[SUB_REAL].zfd, ZT_FLUSH, &x);
1174         if (res)
1175                 ast_log(LOG_WARNING, "Unable to flush input on channel %d\n", p->channel);
1176         p->outgoing = 1;
1177
1178         switch(p->sig) {
1179         case SIG_FXOLS:
1180         case SIG_FXOGS:
1181         case SIG_FXOKS:
1182                 if (p->owner == ast) {
1183                         /* Normal ring, on hook */
1184                         
1185                         /* Don't send audio while on hook, until the call is answered */
1186                         p->dialing = 1;
1187                         if (p->use_callerid) {
1188                                 /* Generate the Caller-ID spill if desired */
1189                                 if (p->cidspill) {
1190                                         ast_log(LOG_WARNING, "cidspill already exists??\n");
1191                                         free(p->cidspill);
1192                                 }
1193                                 p->cidspill = malloc(MAX_CALLERID_SIZE);
1194                                 p->callwaitcas = 0;
1195                                 if (p->cidspill) {
1196                                         p->cidlen = ast_callerid_generate(p->cidspill, ast->callerid, AST_LAW(p));
1197                                         p->cidpos = 0;
1198                                         send_callerid(p);
1199                                 } else
1200                                         ast_log(LOG_WARNING, "Unable to generate CallerID spill\n");
1201                         }
1202                         /* Select proper cadence */
1203                         if ((p->distinctivering > 0) && (p->distinctivering <= NUM_CADENCE)) {
1204                                 if (ioctl(p->subs[SUB_REAL].zfd, ZT_SETCADENCE, &cadences[p->distinctivering-1]))
1205                                         ast_log(LOG_WARNING, "Unable to set distinctive ring cadence %d on '%s'\n", p->distinctivering, ast->name);
1206                                 p->cidrings = cidrings[p->distinctivering - 1];
1207                         } else {
1208                                 if (ioctl(p->subs[SUB_REAL].zfd, ZT_SETCADENCE, NULL))
1209                                         ast_log(LOG_WARNING, "Unable to reset default ring on '%s'\n", ast->name);
1210                                 p->cidrings = DEFAULT_CIDRINGS;
1211                         }
1212
1213
1214                         /* nick@dccinc.com 4/3/03 mods to allow for deferred dialing */
1215                         c = strchr(dest, '/');
1216                         if (c)
1217                           c++;
1218                         if (c && (strlen(c) < p->stripmsd)) {
1219                           ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
1220                           c = NULL;
1221                         }
1222                         if (c) {
1223                                 p->dop.op = ZT_DIAL_OP_REPLACE;
1224                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "Tw%s", c);
1225                                 ast_log(LOG_DEBUG, "FXO: setup deferred dialstring: %s\n", c);
1226                         } else {
1227                                 strcpy(p->dop.dialstr, "");
1228                         }
1229                         x = ZT_RING;
1230                         if (ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x) && (errno != EINPROGRESS)) {
1231                                 ast_log(LOG_WARNING, "Unable to ring phone: %s\n", strerror(errno));
1232                                 return -1;
1233                         }
1234                         p->dialing = 1;
1235                 } else {
1236                         /* Call waiting call */
1237                         p->callwaitrings = 0;
1238                         if (ast->callerid)
1239                                 strncpy(p->callwaitcid, ast->callerid, sizeof(p->callwaitcid)-1);
1240                         else
1241                                 strcpy(p->callwaitcid, "");
1242                         /* Call waiting tone instead */
1243                         if (zt_callwait(ast))
1244                                 return -1;
1245                         /* Make ring-back */
1246                         if (tone_zone_play_tone(p->subs[SUB_CALLWAIT].zfd, ZT_TONE_RINGTONE))
1247                                 ast_log(LOG_WARNING, "Unable to generate call-wait ring-back on channel %s\n", ast->name);
1248                                 
1249                 }
1250                 if (ast->callerid) 
1251                         strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1252                 else
1253                         strcpy(callerid, "");
1254                 ast_callerid_parse(callerid, &n, &l);
1255                 if (l) {
1256                         ast_shrink_phone_number(l);
1257                         if (!ast_isphonenumber(l))
1258                                 l = NULL;
1259                 }
1260                 if (l)
1261                         strcpy(p->lastcallerid, l);
1262                 else
1263                         strcpy(p->lastcallerid, "");
1264                 ast_setstate(ast, AST_STATE_RINGING);
1265                 index = zt_get_index(ast, p, 0);
1266                 if (index > -1) {
1267                         p->subs[index].needringing = 1;
1268                 }
1269                 break;
1270         case SIG_FXSLS:
1271         case SIG_FXSGS:
1272         case SIG_FXSKS:
1273         case SIG_EMWINK:
1274         case SIG_EM:
1275         case SIG_FEATD:
1276         case SIG_FEATDMF:
1277         case SIG_FEATB:
1278         case SIG_SFWINK:
1279         case SIG_SF:
1280         case SIG_SF_FEATD:
1281         case SIG_SF_FEATDMF:
1282         case SIG_SF_FEATB:
1283                 c = strchr(dest, '/');
1284                 if (c)
1285                         c++;
1286                 else
1287                         c = dest;
1288                 if (strlen(c) < p->stripmsd) {
1289                         ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
1290                         return -1;
1291                 }
1292                 x = ZT_START;
1293                 /* Start the trunk */
1294                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
1295                 if (res < 0) {
1296                         if (errno != EINPROGRESS) {
1297                                 ast_log(LOG_WARNING, "Unable to start channel: %s\n", strerror(errno));
1298                                 return -1;
1299                         }
1300                 }
1301                 ast_log(LOG_DEBUG, "Dialing '%s'\n", c);
1302                 p->dop.op = ZT_DIAL_OP_REPLACE;
1303                 if (p->sig == SIG_FEATD) {
1304                         if (ast->callerid) {
1305                                 strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1306                                 ast_callerid_parse(callerid, &n, &l);
1307                                 if (l) {
1308                                         ast_shrink_phone_number(l);
1309                                         if (!ast_isphonenumber(l))
1310                                                 l = NULL;
1311                                 }
1312                         } else
1313                                 l = NULL;
1314                         if (l) 
1315                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T*%s*%s*", l, c + p->stripmsd);
1316                         else
1317                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T**%s*", c + p->stripmsd);
1318                 } else 
1319                 if (p->sig == SIG_FEATDMF) {
1320                         if (ast->callerid) {
1321                                 strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1322                                 ast_callerid_parse(callerid, &n, &l);
1323                                 if (l) {
1324                                         ast_shrink_phone_number(l);
1325                                         if (!ast_isphonenumber(l))
1326                                                 l = NULL;
1327                                 }
1328                         } else
1329                                 l = NULL;
1330                         if (l) 
1331                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "M*00%s#*%s#", l, c + p->stripmsd);
1332                         else
1333                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "M*02#*%s#", c + p->stripmsd);
1334                 } else 
1335                 if (p->sig == SIG_FEATB) {
1336                         snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "M*%s#", c + p->stripmsd);
1337                 } else 
1338                         snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T%s", c + p->stripmsd);
1339                 if (!res) {
1340                         if (ioctl(p->subs[SUB_REAL].zfd, ZT_DIAL, &p->dop)) {
1341                                 x = ZT_ONHOOK;
1342                                 ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
1343                                 ast_log(LOG_WARNING, "Dialing failed on channel %d: %s\n", p->channel, strerror(errno));
1344                                 return -1;
1345                         }
1346                 } else
1347                         ast_log(LOG_DEBUG, "Deferring dialing...\n");
1348                 p->dialing = 1;
1349                 if (strlen(c + p->stripmsd) < 1) p->dialednone = 1;
1350                 ast_setstate(ast, AST_STATE_DIALING);
1351                 break;
1352 #ifdef ZAPATA_PRI
1353         case SIG_PRI:
1354                 c = strchr(dest, '/');
1355                 if (c)
1356                         c++;
1357                 else
1358                         c = dest;
1359                 if (ast->callerid) {
1360                         strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1361                         ast_callerid_parse(callerid, &n, &l);
1362                         if (l) {
1363                                 ast_shrink_phone_number(l);
1364                                 if (!ast_isphonenumber(l))
1365                                         l = NULL;
1366                         }
1367                 } else
1368                         l = NULL;
1369                 if (strlen(c) < p->stripmsd) {
1370                         ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
1371                         return -1;
1372                 }
1373                 p->dop.op = ZT_DIAL_OP_REPLACE;
1374                 s = strchr(c + p->stripmsd, 'w');
1375                 if (s) {
1376                         snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T%s", s);
1377                         *s = '\0';
1378                 } else {
1379                         strcpy(p->dop.dialstr, "");
1380                 }
1381                 if (!(p->call = pri_new_call(p->pri->pri))) {
1382                         ast_log(LOG_WARNING, "Unable to create call on channel %d\n", p->channel);
1383                         return -1;
1384                 }
1385                 if (pri_call(p->pri->pri, p->call, p->digital ? PRI_TRANS_CAP_DIGITAL : PRI_TRANS_CAP_SPEECH, 
1386                         p->prioffset, p->pri->nodetype == PRI_NETWORK ? 0 : 1, 1, l, p->pri->dialplan - 1, n,
1387                         l ? PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN : PRES_NUMBER_NOT_AVAILABLE,
1388                         c + p->stripmsd, p->pri->dialplan - 1, 
1389                         ((p->law == ZT_LAW_ALAW) ? PRI_LAYER_1_ALAW : PRI_LAYER_1_ULAW))) {
1390                         ast_log(LOG_WARNING, "Unable to setup call to %s\n", c + p->stripmsd);
1391                         return -1;
1392                 }
1393                 ast_setstate(ast, AST_STATE_DIALING);
1394                 break;
1395 #endif          
1396         case 0:
1397                 /* Special pseudo -- automatically up*/
1398                 ast_setstate(ast, AST_STATE_UP);
1399                 break;          
1400         default:
1401                 ast_log(LOG_DEBUG, "not yet implemented\n");
1402                 return -1;
1403         }
1404         return 0;
1405 }
1406
1407 static int destroy_channel(struct zt_pvt *prev, struct zt_pvt *cur, int now)
1408 {
1409         int owned = 0;
1410         int i = 0;
1411
1412         if (!now) {
1413                 if (cur->owner) {
1414                         owned = 1;
1415                 }
1416
1417                 for (i = 0; i < 3; i++) {
1418                         if (cur->subs[i].owner) {
1419                                 owned = 1;
1420                         }
1421                 }
1422                 if (!owned) {
1423                         if (prev) {
1424                                 prev->next = cur->next;
1425                         } else {
1426                                 iflist = cur->next;
1427                         }
1428                         if (cur->subs[SUB_REAL].zfd > -1) {
1429                                 zt_close(cur->subs[SUB_REAL].zfd);
1430                         }
1431                         free(cur);
1432                 }
1433         } else {
1434                 if (prev) {
1435                         prev->next = cur->next;
1436                 } else {
1437                         iflist = cur->next;
1438                 }
1439                 if (cur->subs[SUB_REAL].zfd > -1) {
1440                         zt_close(cur->subs[SUB_REAL].zfd);
1441                 }
1442                 free(cur);
1443         }
1444         return 0;
1445 }
1446
1447
1448 static int zt_hangup(struct ast_channel *ast)
1449 {
1450         int res;
1451         int index,x, law;
1452         static int restore_gains(struct zt_pvt *p);
1453         struct zt_pvt *p = ast->pvt->pvt;
1454         struct zt_pvt *tmp = NULL;
1455         struct zt_pvt *prev = NULL;
1456         ZT_PARAMS par;
1457
1458         if (option_debug)
1459                 ast_log(LOG_DEBUG, "zt_hangup(%s)\n", ast->name);
1460         if (!ast->pvt->pvt) {
1461                 ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
1462                 return 0;
1463         }
1464         
1465         ast_pthread_mutex_lock(&p->lock);
1466         
1467         index = zt_get_index(ast, p, 1);
1468
1469         if (p->sig == SIG_PRI) {
1470                 x = 1;
1471                 ast_channel_setoption(ast,AST_OPTION_AUDIO_MODE,&x,sizeof(char),0);
1472         }
1473
1474         x = 0;
1475         zt_confmute(p, 0);
1476         restore_gains(p);
1477         
1478         ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_DTMF | p->dtmfrelax);
1479
1480
1481         ast_log(LOG_DEBUG, "Hangup: channel: %d index = %d, normal = %d, callwait = %d, thirdcall = %d\n",
1482                 p->channel, index, p->subs[SUB_REAL].zfd, p->subs[SUB_CALLWAIT].zfd, p->subs[SUB_THREEWAY].zfd);
1483         p->ignoredtmf = 0;
1484         
1485         if (index > -1) {
1486                 /* Real channel, do some fixup */
1487                 p->subs[index].owner = NULL;
1488                 p->subs[index].needanswer = 0;
1489                 p->subs[index].needringing = 0;
1490                 p->subs[index].linear = 0;
1491                 p->subs[index].needcallerid = 0;
1492                 zt_setlinear(p->subs[index].zfd, 0);
1493                 if (index == SUB_REAL) {
1494                         if ((p->subs[SUB_CALLWAIT].zfd > -1) && (p->subs[SUB_THREEWAY].zfd > -1)) {
1495                                 ast_log(LOG_DEBUG, "Normal call hung up with both three way call and a call waiting call in place?\n");
1496                                 if (p->subs[SUB_CALLWAIT].inthreeway) {
1497                                         /* We had flipped over to answer a callwait and now it's gone */
1498                                         ast_log(LOG_DEBUG, "We were flipped over to the callwait, moving back and unowning.\n");
1499                                         /* Move to the call-wait, but un-own us until they flip back. */
1500                                         swap_subs(p, SUB_CALLWAIT, SUB_REAL);
1501                                         unalloc_sub(p, SUB_CALLWAIT);
1502                                         p->owner = NULL;
1503                                 } else {
1504                                         /* The three way hung up, but we still have a call wait */
1505                                         ast_log(LOG_DEBUG, "We were in the threeway and have a callwait still.  Ditching the threeway.\n");
1506                                         swap_subs(p, SUB_THREEWAY, SUB_REAL);
1507                                         unalloc_sub(p, SUB_THREEWAY);
1508                                         if (p->subs[SUB_REAL].inthreeway) {
1509                                                 /* This was part of a three way call.  Immediately make way for
1510                                                    another call */
1511                                                 ast_log(LOG_DEBUG, "Call was complete, setting owner to former third call\n");
1512                                                 p->owner = p->subs[SUB_REAL].owner;
1513                                         } else {
1514                                                 /* This call hasn't been completed yet...  Set owner to NULL */
1515                                                 ast_log(LOG_DEBUG, "Call was incomplete, setting owner to NULL\n");
1516                                                 p->owner = NULL;
1517                                         }
1518                                         p->subs[SUB_REAL].inthreeway = 0;
1519                                 }
1520                         } else if (p->subs[SUB_CALLWAIT].zfd > -1) {
1521                                 /* Move to the call-wait and switch back to them. */
1522                                 swap_subs(p, SUB_CALLWAIT, SUB_REAL);
1523                                 unalloc_sub(p, SUB_CALLWAIT);
1524                                 p->owner = p->subs[SUB_REAL].owner;
1525                                 if (p->subs[SUB_REAL].owner->bridge)
1526                                         ast_moh_stop(p->subs[SUB_REAL].owner->bridge);
1527                         } else if (p->subs[SUB_THREEWAY].zfd > -1) {
1528                                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
1529                                 unalloc_sub(p, SUB_THREEWAY);
1530                                 if (p->subs[SUB_REAL].inthreeway) {
1531                                         /* This was part of a three way call.  Immediately make way for
1532                                            another call */
1533                                         ast_log(LOG_DEBUG, "Call was complete, setting owner to former third call\n");
1534                                         p->owner = p->subs[SUB_REAL].owner;
1535                                 } else {
1536                                         /* This call hasn't been completed yet...  Set owner to NULL */
1537                                         ast_log(LOG_DEBUG, "Call was incomplete, setting owner to NULL\n");
1538                                         p->owner = NULL;
1539                                 }
1540                                 p->subs[SUB_REAL].inthreeway = 0;
1541                         }
1542                 } else if (index == SUB_CALLWAIT) {
1543                         /* Ditch the holding callwait call, and immediately make it availabe */
1544                         if (p->subs[SUB_CALLWAIT].inthreeway) {
1545                                 /* This is actually part of a three way, placed on hold.  Place the third part
1546                                    on music on hold now */
1547                                 if (p->subs[SUB_THREEWAY].owner && p->subs[SUB_THREEWAY].owner->bridge)
1548                                         ast_moh_start(p->subs[SUB_THREEWAY].owner->bridge, NULL);
1549                                 p->subs[SUB_THREEWAY].inthreeway = 0;
1550                                 /* Make it the call wait now */
1551                                 swap_subs(p, SUB_CALLWAIT, SUB_THREEWAY);
1552                                 unalloc_sub(p, SUB_THREEWAY);
1553                         } else
1554                                 unalloc_sub(p, SUB_CALLWAIT);
1555                 } else if (index == SUB_THREEWAY) {
1556                         if (p->subs[SUB_CALLWAIT].inthreeway) {
1557                                 /* The other party of the three way call is currently in a call-wait state.
1558                                    Start music on hold for them, and take the main guy out of the third call */
1559                                 if (p->subs[SUB_CALLWAIT].owner && p->subs[SUB_CALLWAIT].owner->bridge)
1560                                         ast_moh_start(p->subs[SUB_CALLWAIT].owner->bridge, NULL);
1561                                 p->subs[SUB_CALLWAIT].inthreeway = 0;
1562                         }
1563                         p->subs[SUB_REAL].inthreeway = 0;
1564                         /* If this was part of a three way call index, let us make
1565                            another three way call */
1566                         unalloc_sub(p, SUB_THREEWAY);
1567                 } else {
1568                         /* This wasn't any sort of call, but how are we an index? */
1569                         ast_log(LOG_WARNING, "Index found but not any type of call?\n");
1570                 }
1571         }
1572
1573
1574         if (!p->subs[SUB_REAL].owner && !p->subs[SUB_CALLWAIT].owner && !p->subs[SUB_THREEWAY].owner) {
1575                 p->owner = NULL;
1576                 p->ringt = 0;
1577                 p->distinctivering = 0;
1578                 p->confirmanswer = 0;
1579                 p->cidrings = 1;
1580                 p->outgoing = 0;
1581                 p->digital = 0;
1582                 p->faxhandled = 0;
1583                 p->pulsedial = 0;
1584                 p->onhooktime = time(NULL);
1585 #ifdef PRI_EVENT_PROCEEDING
1586                 p->proceeding = 0;
1587 #endif
1588                 if (p->dsp) {
1589                         ast_dsp_free(p->dsp);
1590                         p->dsp = NULL;
1591                 }
1592                 law = ZT_LAW_DEFAULT;
1593                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_SETLAW, &law);
1594                 if (res < 0) 
1595                         ast_log(LOG_WARNING, "Unable to set law on channel %d to default\n", p->channel);
1596                 /* Perform low level hangup if no owner left */
1597 #ifdef ZAPATA_PRI
1598                 if (p->sig == SIG_PRI) {
1599                         if (p->call) {
1600                                 if (!pri_grab(p, p->pri)) {
1601                                         res = pri_disconnect(p->pri->pri, p->call, PRI_CAUSE_NORMAL_CLEARING);
1602                                         if (p->alreadyhungup) {
1603                                                 p->call = NULL;
1604                                                 p->alreadyhungup = 0;
1605                                         }
1606                                         if (res < 0) 
1607                                                 ast_log(LOG_WARNING, "pri_disconnect failed\n");
1608                                         pri_rel(p->pri);                        
1609                                 } else {
1610                                         ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
1611                                         res = -1;
1612                                 }
1613                         } else
1614                                 res = 0;
1615
1616                 } else 
1617 #endif
1618 #ifdef ZAPATA_R2
1619                 if (p->sig == SIG_R2) {
1620                         if (p->hasr2call) {
1621                                 mfcr2_DropCall(p->r2, NULL, UC_NORMAL_CLEARING);
1622                                 p->hasr2call = 0;
1623                                 res = 0;
1624                         } else
1625                                 res = 0;
1626
1627                 } else 
1628 #endif
1629                 if (p->sig)
1630                         res = zt_set_hook(p->subs[SUB_REAL].zfd, ZT_ONHOOK);
1631                 if (res < 0) {
1632                         ast_log(LOG_WARNING, "Unable to hangup line %s\n", ast->name);
1633                 }
1634                 switch(p->sig) {
1635                 case SIG_FXOGS:
1636                 case SIG_FXOLS:
1637                 case SIG_FXOKS:
1638                         res = ioctl(p->subs[SUB_REAL].zfd, ZT_GET_PARAMS, &par);
1639                         if (!res) {
1640 #if 0
1641                                 ast_log(LOG_DEBUG, "Hanging up channel %d, offhook = %d\n", p->channel, par.rxisoffhook);
1642 #endif
1643                                 /* If they're off hook, try playing congestion */
1644                                 if (par.rxisoffhook)
1645                                         tone_zone_play_tone(p->subs[SUB_REAL].zfd, ZT_TONE_CONGESTION);
1646                                 else
1647                                         tone_zone_play_tone(p->subs[SUB_REAL].zfd, -1);
1648                         }
1649                         break;
1650                 default:
1651                         tone_zone_play_tone(p->subs[SUB_REAL].zfd, -1);
1652                 }
1653                 if (p->cidspill)
1654                         free(p->cidspill);
1655                 if (p->sig)
1656                         zt_disable_ec(p);
1657                 x = 0;
1658                 ast_channel_setoption(ast,AST_OPTION_TONE_VERIFY,&x,sizeof(char),0);
1659                 ast_channel_setoption(ast,AST_OPTION_TDD,&x,sizeof(char),0);
1660                 p->didtdd = 0;
1661                 p->cidspill = NULL;
1662                 p->callwaitcas = 0;
1663                 p->callwaiting = p->permcallwaiting;
1664                 p->hidecallerid = p->permhidecallerid;
1665                 p->dialing = 0;
1666                 strcpy(p->rdnis, "");
1667                 update_conf(p);
1668                 /* Restore data mode */
1669                 if (p->sig == SIG_PRI) {
1670                         x = 0;
1671                         ast_channel_setoption(ast,AST_OPTION_AUDIO_MODE,&x,sizeof(char),0);
1672                 }
1673
1674         if (p->dsp)
1675                 restart_monitor();
1676         }
1677
1678
1679         p->callwaitingrepeat = 0;
1680         p->cidcwexpire = 0;
1681         ast->pvt->pvt = NULL;
1682         ast_pthread_mutex_unlock(&p->lock);
1683         ast_pthread_mutex_lock(&usecnt_lock);
1684         usecnt--;
1685         if (usecnt < 0) 
1686                 ast_log(LOG_WARNING, "Usecnt < 0???\n");
1687         ast_pthread_mutex_unlock(&usecnt_lock);
1688         ast_update_use_count();
1689         if (option_verbose > 2) 
1690                 ast_verbose( VERBOSE_PREFIX_3 "Hungup '%s'\n", ast->name);
1691
1692         ast_pthread_mutex_lock(&iflock);
1693         tmp = iflist;
1694         prev = NULL;
1695         if (p->destroy) {
1696                 while (tmp) {
1697                         if (tmp == p) {
1698                                 destroy_channel(prev, tmp, 0);
1699                                 break;
1700                         } else {
1701                                 prev = tmp;
1702                                 tmp = tmp->next;
1703                         }
1704                 }
1705         }
1706         ast_pthread_mutex_unlock(&iflock);
1707         return 0;
1708 }
1709
1710 static int zt_answer(struct ast_channel *ast)
1711 {
1712         struct zt_pvt *p = ast->pvt->pvt;
1713         int res=0;
1714         int index;
1715         int oldstate = ast->_state;
1716         ast_setstate(ast, AST_STATE_UP);
1717         ast_pthread_mutex_lock(&p->lock);
1718         index = zt_get_index(ast, p, 0);
1719         if (index < 0)
1720                 index = SUB_REAL;
1721         /* nothing to do if a radio channel */
1722         if (p->radio) {
1723                 ast_pthread_mutex_unlock(&p->lock);
1724                 return 0;
1725         }
1726         switch(p->sig) {
1727         case SIG_FXSLS:
1728         case SIG_FXSGS:
1729         case SIG_FXSKS:
1730                 p->ringt = 0;
1731                 /* Fall through */
1732         case SIG_EM:
1733         case SIG_EMWINK:
1734         case SIG_FEATD:
1735         case SIG_FEATDMF:
1736         case SIG_FEATB:
1737         case SIG_SF:
1738         case SIG_SFWINK:
1739         case SIG_SF_FEATD:
1740         case SIG_SF_FEATDMF:
1741         case SIG_SF_FEATB:
1742         case SIG_FXOLS:
1743         case SIG_FXOGS:
1744         case SIG_FXOKS:
1745                 /* Pick up the line */
1746                 ast_log(LOG_DEBUG, "Took %s off hook\n", ast->name);
1747                 res =  zt_set_hook(p->subs[SUB_REAL].zfd, ZT_OFFHOOK);
1748                 tone_zone_play_tone(p->subs[index].zfd, -1);
1749                 p->dialing = 0;
1750                 if ((index == SUB_REAL) && p->subs[SUB_THREEWAY].inthreeway) {
1751                         if (oldstate == AST_STATE_RINGING) {
1752                                 ast_log(LOG_DEBUG, "Finally swapping real and threeway\n");
1753                                 tone_zone_play_tone(p->subs[SUB_THREEWAY].zfd, -1);
1754                                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
1755                                 p->owner = p->subs[SUB_REAL].owner;
1756                         }
1757                 }
1758                 break;
1759 #ifdef ZAPATA_PRI
1760         case SIG_PRI:
1761                 /* Send a pri acknowledge */
1762                 if (!pri_grab(p, p->pri)) {
1763                         res = pri_answer(p->pri->pri, p->call, 0, 1);
1764                         pri_rel(p->pri);
1765                 } else {
1766                         ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
1767                         res= -1;
1768                 }
1769                 break;
1770 #endif
1771 #ifdef ZAPATA_R2
1772         case SIG_R2:
1773                 res = mfcr2_AnswerCall(p->r2, NULL);
1774                 if (res)
1775                         ast_log(LOG_WARNING, "R2 Answer call failed :( on %s\n", ast->name);
1776                 break;
1777 #endif                  
1778         case 0:
1779                 return 0;
1780         default:
1781                 ast_log(LOG_WARNING, "Don't know how to answer signalling %d (channel %d)\n", p->sig, p->channel);
1782                 res = -1;
1783         }
1784         ast_pthread_mutex_unlock(&p->lock);
1785         return res;
1786 }
1787
1788 static int zt_setoption(struct ast_channel *chan, int option, void *data, int datalen)
1789 {
1790 char    *cp;
1791 int     x;
1792
1793         struct zt_pvt *p = chan->pvt->pvt;
1794
1795         
1796         if ((option != AST_OPTION_TONE_VERIFY) && (option != AST_OPTION_AUDIO_MODE) &&
1797                 (option != AST_OPTION_TDD) && (option != AST_OPTION_RELAXDTMF))
1798            {
1799                 errno = ENOSYS;
1800                 return -1;
1801            }
1802         cp = (char *)data;
1803         if ((!cp) || (datalen < 1))
1804            {
1805                 errno = EINVAL;
1806                 return -1;
1807            }
1808         switch(option) {
1809             case AST_OPTION_TONE_VERIFY:
1810                 if (!p->dsp)
1811                         break;
1812                 switch(*cp) {
1813                     case 1:
1814                                 ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: MUTECONF(1) on %s\n",chan->name);
1815                                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_MUTECONF | p->dtmfrelax);  /* set mute mode if desired */
1816                         break;
1817                     case 2:
1818                                 ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: MUTECONF/MAX(2) on %s\n",chan->name);
1819                                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_MUTECONF | DSP_DIGITMODE_MUTEMAX | p->dtmfrelax);  /* set mute mode if desired */
1820                         break;
1821                     default:
1822                                 ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: OFF(0) on %s\n",chan->name);
1823                                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_DTMF | p->dtmfrelax);  /* set mute mode if desired */
1824                         break;
1825                 }
1826                 break;
1827             case AST_OPTION_TDD:  /* turn on or off TDD */
1828                 if (!*cp) { /* turn it off */
1829                         ast_log(LOG_DEBUG, "Set option TDD MODE, value: OFF(0) on %s\n",chan->name);
1830                         if (p->tdd) tdd_free(p->tdd);
1831                         p->tdd = 0;
1832                         p->mate = 0;
1833                         break;
1834                 }
1835                 if (*cp == 2)
1836                         ast_log(LOG_DEBUG, "Set option TDD MODE, value: MATE(2) on %s\n",chan->name);
1837                 else ast_log(LOG_DEBUG, "Set option TDD MODE, value: ON(1) on %s\n",chan->name);
1838                 p->mate = 0;
1839                 zt_disable_ec(p);
1840                 /* otherwise, turn it on */
1841                 if (!p->didtdd) { /* if havent done it yet */
1842                         unsigned char mybuf[41000],*buf;
1843                         int size,res,fd,len;
1844                         int index;
1845                         fd_set wfds,efds;
1846                         buf = mybuf;
1847                         memset(buf,0x7f,sizeof(mybuf)); /* set to silence */
1848                         ast_tdd_gen_ecdisa(buf + 16000,16000);  /* put in tone */
1849                         len = 40000;
1850                         index = zt_get_index(chan, p, 0);
1851                         if (index < 0) {
1852                                 ast_log(LOG_WARNING, "No index in TDD?\n");
1853                                 return -1;
1854                         }
1855                         fd = p->subs[index].zfd;
1856                         while(len) {
1857                                 if (ast_check_hangup(chan)) return -1;
1858                                 size = len;
1859                                 if (size > READ_SIZE)
1860                                         size = READ_SIZE;
1861                                 FD_ZERO(&wfds);
1862                                 FD_ZERO(&efds);
1863                                 FD_SET(fd,&wfds);
1864                                 FD_SET(fd,&efds);                       
1865                                 res = select(fd + 1,NULL,&wfds,&efds,NULL);
1866                                 if (!res) {
1867                                         ast_log(LOG_DEBUG, "select (for write) ret. 0 on channel %d\n", p->channel);
1868                                         continue;
1869                                 }
1870                                   /* if got exception */
1871                                 if (FD_ISSET(fd,&efds)) return -1;
1872                                 if (!FD_ISSET(fd,&wfds)) {
1873                                         ast_log(LOG_DEBUG, "write fd not ready on channel %d\n", p->channel);
1874                                         continue;
1875                                 }
1876                                 res = write(fd, buf, size);
1877                                 if (res != size) {
1878                                         if (res == -1) return -1;
1879                                         ast_log(LOG_DEBUG, "Write returned %d (%s) on channel %d\n", res, strerror(errno), p->channel);
1880                                         break;
1881                                 }
1882                                 len -= size;
1883                                 buf += size;
1884                         }
1885                         p->didtdd = 1; /* set to have done it now */            
1886                 }
1887                 if (*cp == 2) { /* Mate mode */
1888                         if (p->tdd) tdd_free(p->tdd);
1889                         p->tdd = 0;
1890                         p->mate = 1;
1891                         break;
1892                         }               
1893                 if (!p->tdd) { /* if we dont have one yet */
1894                         p->tdd = tdd_new(); /* allocate one */
1895                 }               
1896                 break;
1897             case AST_OPTION_RELAXDTMF:  /* Relax DTMF decoding (or not) */
1898                 if (!*cp)
1899                 {               
1900                         ast_log(LOG_DEBUG, "Set option RELAX DTMF, value: OFF(0) on %s\n",chan->name);
1901                         x = 0;
1902                 }
1903                 else
1904                 {               
1905                         ast_log(LOG_DEBUG, "Set option RELAX DTMF, value: ON(1) on %s\n",chan->name);
1906                         x = 1;
1907                 }
1908                 ast_dsp_digitmode(p->dsp,x ? DSP_DIGITMODE_RELAXDTMF : DSP_DIGITMODE_DTMF | p->dtmfrelax);
1909                 break;
1910             case AST_OPTION_AUDIO_MODE:  /* Set AUDIO mode (or not) */
1911                 if (!*cp)
1912                 {               
1913                         ast_log(LOG_DEBUG, "Set option AUDIO MODE, value: OFF(0) on %s\n",chan->name);
1914                         x = 0;
1915                         zt_disable_ec(p);
1916                 }
1917                 else
1918                 {               
1919                         ast_log(LOG_DEBUG, "Set option AUDIO MODE, value: ON(1) on %s\n",chan->name);
1920                         x = 1;
1921                 }
1922                 if (ioctl(p->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &x) == -1)
1923                         ast_log(LOG_WARNING, "Unable to set audio mode on channel %d to %d\n", p->channel, x);
1924                 break;
1925         }
1926         errno = 0;
1927         return 0;
1928 }
1929
1930 static void zt_unlink(struct zt_pvt *slave, struct zt_pvt *master)
1931 {
1932         /* Unlink a specific slave or all slaves/masters from a given master */
1933         int x;
1934         int hasslaves;
1935         if (!master)
1936                 return;
1937         hasslaves = 0;
1938         for (x=0;x<MAX_SLAVES;x++) {
1939                 if (master->slaves[x]) {
1940                         if (!slave || (master->slaves[x] == slave)) {
1941                                 /* Take slave out of the conference */
1942                                 ast_log(LOG_DEBUG, "Unlinking slave %d from %d\n", master->slaves[x]->channel, master->channel);
1943                                 conf_del(&master->confno, &master->slaves[x]->subs[SUB_REAL], SUB_REAL);
1944                                 master->slaves[x]->master = NULL;
1945                                 master->slaves[x] = NULL;
1946                         } else
1947                                 hasslaves = 1;
1948                 }
1949                 if (!hasslaves)
1950                         master->inconference = 0;
1951         }
1952         if (!slave) {
1953                 if (master->master) {
1954                         /* Take master out of the conference */
1955                         conf_del(&master->master->confno, &master->subs[SUB_REAL], SUB_REAL);
1956                         hasslaves = 0;
1957                         for (x=0;x<MAX_SLAVES;x++) {
1958                                 if (master->master->slaves[x] == master)
1959                                         master->master->slaves[x] = NULL;
1960                                 else if (master->master->slaves[x])
1961                                         hasslaves = 1;
1962                         }
1963                         if (!hasslaves)
1964                                 master->master->inconference = 0;
1965                 }
1966                 master->master = NULL;
1967         }
1968         update_conf(master);
1969 }
1970
1971 static void zt_link(struct zt_pvt *slave, struct zt_pvt *master) {
1972         int x;
1973         if (!slave || !master) {
1974                 ast_log(LOG_WARNING, "Tried to link to/from NULL??\n");
1975                 return;
1976         }
1977         for (x=0;x<MAX_SLAVES;x++) {
1978                 if (!master->slaves[x]) {
1979                         master->slaves[x] = slave;
1980                         break;
1981                 }
1982         }
1983         if (x >= MAX_SLAVES) {
1984                 ast_log(LOG_WARNING, "Replacing slave %d with new slave, %d\n", master->slaves[MAX_SLAVES - 1]->channel, slave->channel);
1985                 master->slaves[MAX_SLAVES - 1] = slave;
1986         }
1987         if (slave->master) 
1988                 ast_log(LOG_WARNING, "Replacing master %d with new master, %d\n", slave->master->channel, master->channel);
1989         slave->master = master;
1990         
1991         ast_log(LOG_DEBUG, "Making %d slave to master %d at %d\n", slave->channel, master->channel, x);
1992 }
1993
1994 static int zt_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc)
1995 {
1996         struct ast_channel *who = NULL, *cs[3];
1997         struct zt_pvt *p0, *p1, *op0, *op1;
1998         struct zt_pvt *master=NULL, *slave=NULL;
1999         struct ast_frame *f;
2000         int to;
2001         int inconf = 0;
2002         int nothingok = 0;
2003         int ofd1, ofd2;
2004         int oi1, oi2, i1 = -1, i2 = -1, t1, t2;
2005         int os1 = -1, os2 = -1;
2006         struct ast_channel *oc1, *oc2;
2007
2008         /* if need DTMF, cant native bridge */
2009         if (flags & (AST_BRIDGE_DTMF_CHANNEL_0 | AST_BRIDGE_DTMF_CHANNEL_1))
2010                 return -2;
2011         p0 = c0->pvt->pvt;
2012         p1 = c1->pvt->pvt;
2013         /* cant do pseudo-channels here */
2014         if ((!p0->sig) || (!p1->sig)) return -2;
2015
2016         ast_pthread_mutex_lock(&c0->lock);
2017         ast_pthread_mutex_lock(&c1->lock);
2018         op0 = p0 = c0->pvt->pvt;
2019         op1 = p1 = c1->pvt->pvt;
2020         ofd1 = c0->fds[0];
2021         ofd2 = c1->fds[0];
2022         oi1 = zt_get_index(c0, p0, 0);
2023         oi2 = zt_get_index(c1, p1, 0);
2024         oc1 = p0->owner;
2025         oc2 = p1->owner;
2026         if ((oi1 < 0) || (oi2 < 0))
2027                 return -1;
2028
2029
2030
2031         ast_pthread_mutex_lock(&p0->lock);
2032         if (pthread_mutex_trylock(&p1->lock)) {
2033                 /* Don't block, due to potential for deadlock */
2034                 ast_pthread_mutex_unlock(&p0->lock);
2035                 ast_pthread_mutex_unlock(&c0->lock);
2036                 ast_pthread_mutex_unlock(&c1->lock);
2037                 ast_log(LOG_NOTICE, "Avoiding deadlock...\n");
2038                 return -3;
2039         }
2040         if ((oi1 == SUB_REAL) && (oi2 == SUB_REAL)) {
2041                 if (!p0->owner || !p1->owner) {
2042                         /* Currently unowned -- Do nothing.  */
2043                         nothingok = 1;
2044                 } else {
2045                         /* If we don't have a call-wait in a 3-way, and we aren't in a 3-way, we can be master */
2046                         if (!p0->subs[SUB_CALLWAIT].inthreeway && !p1->subs[SUB_REAL].inthreeway) {
2047                                 master = p0;
2048                                 slave = p1;
2049                                 inconf = 1;
2050                         } else if (!p1->subs[SUB_CALLWAIT].inthreeway && !p0->subs[SUB_REAL].inthreeway) {
2051                                 master = p1;
2052                                 slave = p0;
2053                                 inconf = 1;
2054                         } else {
2055                                 ast_log(LOG_WARNING, "Huh?  Both calls are callwaits or 3-ways?  That's clever...?\n");
2056                                 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,
2057                                                 p0->channel, oi1, (p1->subs[SUB_CALLWAIT].zfd > -1) ? 1 : 0, p1->subs[SUB_REAL].inthreeway);
2058                         }
2059                 }
2060         } else if ((oi1 == SUB_REAL) && (oi2 == SUB_THREEWAY)) {
2061                 if (p1->subs[SUB_THREEWAY].inthreeway) {
2062                         master = p1;
2063                         slave = p0;
2064                 } else {
2065                         nothingok = 1;
2066                 }
2067         } else if ((oi1 == SUB_THREEWAY) && (oi2 == SUB_REAL)) {
2068                 if (p0->subs[SUB_THREEWAY].inthreeway) {
2069                         master = p0;
2070                         slave = p1;
2071                 } else {
2072                         nothingok  = 1;
2073                 }
2074         } else if ((oi1 == SUB_REAL) && (oi2 == SUB_CALLWAIT)) {
2075                 /* We have a real and a call wait.  If we're in a three way call, put us in it, otherwise, 
2076                    don't put us in anything */
2077                 if (p1->subs[SUB_CALLWAIT].inthreeway) {
2078                         master = p1;
2079                         slave = p0;
2080                 } else {
2081                         nothingok = 1;
2082                 }
2083         } else if ((oi1 == SUB_CALLWAIT) && (oi2 == SUB_REAL)) {
2084                 /* Same as previous */
2085                 if (p0->subs[SUB_CALLWAIT].inthreeway) {
2086                         master = p0;
2087                         slave = p1;
2088                 } else {
2089                         nothingok = 1;
2090                 }
2091         }
2092         ast_log(LOG_DEBUG, "master: %d, slave: %d, nothingok: %d\n",
2093                 master ? master->channel : 0, slave ? slave->channel : 0, nothingok);
2094         if (master && slave) {
2095                 /* Stop any tones, or play ringtone as appropriate.  If they're bridged
2096                    in an active threeway call with a channel that is ringing, we should
2097                    indicate ringing. */
2098                 if ((oi2 == SUB_THREEWAY) && 
2099                         p1->subs[SUB_THREEWAY].inthreeway && 
2100                         p1->subs[SUB_REAL].owner && 
2101                         p1->subs[SUB_REAL].inthreeway && 
2102                         (p1->subs[SUB_REAL].owner->_state == AST_STATE_RINGING)) {
2103                                 ast_log(LOG_DEBUG, "Playing ringback on %s since %s is in a ringing three-way\n", c0->name, c1->name);
2104                                 tone_zone_play_tone(p0->subs[oi1].zfd, ZT_TONE_RINGTONE);
2105                                 os2 = p1->subs[SUB_REAL].owner->_state;
2106                 } else {
2107                                 ast_log(LOG_DEBUG, "Stoping tones on %d/%d talking to %d/%d\n", p0->channel, oi1, p1->channel, oi2);
2108                                 tone_zone_play_tone(p0->subs[oi1].zfd, -1);
2109                 }
2110                 if ((oi1 == SUB_THREEWAY) && 
2111                         p0->subs[SUB_THREEWAY].inthreeway && 
2112                         p0->subs[SUB_REAL].owner && 
2113                         p0->subs[SUB_REAL].inthreeway && 
2114                         (p0->subs[SUB_REAL].owner->_state == AST_STATE_RINGING)) {
2115                                 ast_log(LOG_DEBUG, "Playing ringback on %s since %s is in a ringing three-way\n", c1->name, c0->name);
2116                                 tone_zone_play_tone(p1->subs[oi2].zfd, ZT_TONE_RINGTONE);
2117                                 os1 = p0->subs[SUB_REAL].owner->_state;
2118                 } else {
2119                                 ast_log(LOG_DEBUG, "Stoping tones on %d/%d talking to %d/%d\n", p1->channel, oi2, p0->channel, oi1);
2120                                 tone_zone_play_tone(p1->subs[oi1].zfd, -1);
2121                 }
2122                 if ((oi1 == SUB_REAL) && (oi2 == SUB_REAL)) {
2123                         if (!p0->echocanbridged || !p1->echocanbridged) {
2124                                 /* Disable echo cancellation if appropriate */
2125                                 zt_disable_ec(p0);
2126                                 zt_disable_ec(p1);
2127                         }
2128                 }
2129                 zt_link(slave, master);
2130                 master->inconference = inconf;
2131         } else if (!nothingok)
2132                 ast_log(LOG_WARNING, "Can't link %d/%s with %d/%s\n", p0->channel, subnames[oi1], p1->channel, subnames[oi2]);
2133
2134         update_conf(p0);
2135         update_conf(p1);
2136         t1 = p0->subs[SUB_REAL].inthreeway;
2137         t2 = p1->subs[SUB_REAL].inthreeway;
2138
2139         ast_pthread_mutex_unlock(&p0->lock);
2140         ast_pthread_mutex_unlock(&p1->lock);
2141
2142         ast_pthread_mutex_unlock(&c0->lock);
2143         ast_pthread_mutex_unlock(&c1->lock);
2144
2145         /* Native bridge failed */
2146         if ((!master || !slave) && !nothingok) {
2147                 if (op0 == p0)
2148                         zt_enable_ec(p0);
2149                 if (op1 == p1)
2150                         zt_enable_ec(p1);
2151                 return -1;
2152         }
2153         
2154         cs[0] = c0;
2155         cs[1] = c1;
2156         cs[2] = NULL;
2157         for (;;) {
2158                 /* Here's our main loop...  Start by locking things, looking for private parts, 
2159                    and then balking if anything is wrong */
2160                 ast_pthread_mutex_lock(&c0->lock);
2161                 ast_pthread_mutex_lock(&c1->lock);
2162                 p0 = c0->pvt->pvt;
2163                 p1 = c1->pvt->pvt;
2164                 if (op0 == p0)
2165                         i1 = zt_get_index(c0, p0, 1);
2166                 if (op1 == p1)
2167                         i2 = zt_get_index(c1, p1, 1);
2168                 ast_pthread_mutex_unlock(&c0->lock);
2169                 ast_pthread_mutex_unlock(&c1->lock);
2170                 if ((op0 != p0) || (op1 != p1) || 
2171                     (ofd1 != c0->fds[0]) || 
2172                         (ofd2 != c1->fds[0]) ||
2173                     (p0->subs[SUB_REAL].owner && (os1 > -1) && (os1 != p0->subs[SUB_REAL].owner->_state)) || 
2174                     (p1->subs[SUB_REAL].owner && (os2 > -1) && (os2 != p1->subs[SUB_REAL].owner->_state)) || 
2175                     (oc1 != p0->owner) || 
2176                         (oc2 != p1->owner) ||
2177                         (t1 != p0->subs[SUB_REAL].inthreeway) ||
2178                         (t2 != p1->subs[SUB_REAL].inthreeway) ||
2179                         (oi1 != i1) ||
2180                         (oi2 != i2)) {
2181                         if (slave && master)
2182                                 zt_unlink(slave, master);
2183                         ast_log(LOG_DEBUG, "Something changed out on %d/%d to %d/%d, returning -3 to restart\n",
2184                                                                         op0->channel, oi1, op1->channel, oi2);
2185                         if (op0 == p0)
2186                                 zt_enable_ec(p0);
2187                         if (op1 == p1)
2188                                 zt_enable_ec(p1);
2189                         return -3;
2190                 }
2191                 to = -1;
2192                 who = ast_waitfor_n(cs, 2, &to);
2193                 if (!who) {
2194                         ast_log(LOG_DEBUG, "Ooh, empty read...\n");
2195                         continue;
2196                 }
2197                 if (who->pvt->pvt == op0) 
2198                         op0->ignoredtmf = 1;
2199                 else if (who->pvt->pvt == op1)
2200                         op1->ignoredtmf = 1;
2201                 f = ast_read(who);
2202                 if (who->pvt->pvt == op0) 
2203                         op0->ignoredtmf = 0;
2204                 else if (who->pvt->pvt == op1)
2205                         op1->ignoredtmf = 0;
2206                 if (!f) {
2207                         *fo = NULL;
2208                         *rc = who;
2209                         if (slave && master)
2210                                 zt_unlink(slave, master);
2211                         if (op0 == p0)
2212                                 zt_enable_ec(p0);
2213                         if (op1 == p1)
2214                                 zt_enable_ec(p1);
2215                         return 0;
2216                 }
2217                 if (f->frametype == AST_FRAME_DTMF) {
2218                         if (((who == c0) && (flags & AST_BRIDGE_DTMF_CHANNEL_0)) || 
2219                             ((who == c1) && (flags & AST_BRIDGE_DTMF_CHANNEL_1))) {
2220                                 *fo = f;
2221                                 *rc = who;
2222                                 if (slave && master)
2223                                         zt_unlink(slave, master);
2224                                 return 0;
2225                         } else if ((who == c0) && p0->pulsedial) {
2226                                 ast_write(c1, f);
2227                         } else if ((who == c1) && p1->pulsedial) {
2228                                 ast_write(c0, f);
2229                         }
2230                 }
2231                 ast_frfree(f);
2232
2233                 /* Swap who gets priority */
2234                 cs[2] = cs[0];
2235                 cs[0] = cs[1];
2236                 cs[1] = cs[2];
2237         }
2238 }
2239
2240 static int zt_indicate(struct ast_channel *chan, int condition);
2241
2242 static int zt_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
2243 {
2244         struct zt_pvt *p = newchan->pvt->pvt;
2245         int x;
2246         ast_log(LOG_DEBUG, "New owner for channel %d is %s\n", p->channel, newchan->name);
2247         if (p->owner == oldchan)
2248                 p->owner = newchan;
2249         for (x=0;x<3;x++)
2250                 if (p->subs[x].owner == oldchan) {
2251                         if (!x)
2252                                 zt_unlink(NULL, p);
2253                         p->subs[x].owner = newchan;
2254                 }
2255         if (newchan->_state == AST_STATE_RINGING) 
2256                 zt_indicate(newchan, AST_CONTROL_RINGING);
2257         update_conf(p);
2258         return 0;
2259 }
2260
2261 static int zt_ring_phone(struct zt_pvt *p)
2262 {
2263         int x;
2264         int res;
2265         /* Make sure our transmit state is on hook */
2266         x = 0;
2267         x = ZT_ONHOOK;
2268         res = ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
2269         do {
2270                 x = ZT_RING;
2271                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
2272 #if 0
2273                 printf("Res: %d, error: %s\n", res, strerror(errno));
2274 #endif                                          
2275                 if (res) {
2276                         switch(errno) {
2277                         case EBUSY:
2278                         case EINTR:
2279                                 /* Wait just in case */
2280                                 usleep(10000);
2281                                 continue;
2282                         case EINPROGRESS:
2283                                 res = 0;
2284                                 break;
2285                         default:
2286                                 ast_log(LOG_WARNING, "Couldn't ring the phone: %s\n", strerror(errno));
2287                                 res = 0;
2288                         }
2289                 }
2290         } while (res);
2291         return res;
2292 }
2293
2294 static void *ss_thread(void *data);
2295
2296 static struct ast_channel *zt_new(struct zt_pvt *, int, int, int, int);
2297
2298 static int attempt_transfer(struct zt_pvt *p)
2299 {
2300         /* In order to transfer, we need at least one of the channels to
2301            actually be in a call bridge.  We can't conference two applications
2302            together (but then, why would we want to?) */
2303         if (p->subs[SUB_REAL].owner->bridge) {
2304                 /* The three-way person we're about to transfer to could still be in MOH, so
2305                    stop if now if appropriate */
2306                 if (p->subs[SUB_THREEWAY].owner->bridge)
2307                         ast_moh_stop(p->subs[SUB_THREEWAY].owner->bridge);
2308                 if (p->subs[SUB_THREEWAY].owner->_state == AST_STATE_RINGING) {
2309                         ast_indicate(p->subs[SUB_REAL].owner->bridge, AST_CONTROL_RINGING);
2310                 }
2311                 if (ast_channel_masquerade(p->subs[SUB_THREEWAY].owner, p->subs[SUB_REAL].owner->bridge)) {
2312                         ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
2313                                         p->subs[SUB_REAL].owner->bridge->name, p->subs[SUB_THREEWAY].owner->name);
2314                         return -1;
2315                 }
2316                 /* Orphan the channel */
2317                 unalloc_sub(p, SUB_THREEWAY);
2318         } else if (p->subs[SUB_THREEWAY].owner->bridge) {
2319                 if (p->subs[SUB_REAL].owner->_state == AST_STATE_RINGING) {
2320                         ast_indicate(p->subs[SUB_THREEWAY].owner->bridge, AST_CONTROL_RINGING);
2321                 }
2322                 ast_moh_stop(p->subs[SUB_THREEWAY].owner->bridge);
2323                 if (ast_channel_masquerade(p->subs[SUB_REAL].owner, p->subs[SUB_THREEWAY].owner->bridge)) {
2324                         ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
2325                                         p->subs[SUB_THREEWAY].owner->bridge->name, p->subs[SUB_REAL].owner->name);
2326                         return -1;
2327                 }
2328                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
2329                 unalloc_sub(p, SUB_THREEWAY);
2330                 /* Tell the caller not to hangup */
2331                 return 1;
2332         } else {
2333                 ast_log(LOG_DEBUG, "Neither %s nor %s are in a bridge, nothing to transfer\n",
2334                                         p->subs[SUB_REAL].owner->name, p->subs[SUB_THREEWAY].owner->name);
2335                 p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2336         }
2337         return 0;
2338 }
2339
2340 #ifdef ZAPATA_R2
2341 static struct ast_frame *handle_r2_event(struct zt_pvt *p, mfcr2_event_t *e, int index)
2342 {
2343         struct ast_frame *f;
2344         f = &p->subs[index].f;
2345         if (!p->r2) {
2346                 ast_log(LOG_WARNING, "Huh?  No R2 structure :(\n");
2347                 return NULL;
2348         }
2349         switch(e->e) {
2350         case MFCR2_EVENT_BLOCKED:
2351                 if (option_verbose > 2)
2352                         ast_verbose(VERBOSE_PREFIX_3 "Channel %d blocked\n", p->channel);
2353                 break;
2354         case MFCR2_EVENT_UNBLOCKED:
2355                 if (option_verbose > 2)
2356                         ast_verbose(VERBOSE_PREFIX_3 "Channel %d unblocked\n", p->channel);
2357                 break;
2358         case MFCR2_EVENT_CONFIG_ERR:
2359                 if (option_verbose > 2)
2360                         ast_verbose(VERBOSE_PREFIX_3 "Config error on channel %d\n", p->channel);
2361                 break;
2362         case MFCR2_EVENT_RING:
2363                 if (option_verbose > 2)
2364                         ast_verbose(VERBOSE_PREFIX_3 "Ring on channel %d\n", p->channel);
2365                 break;
2366         case MFCR2_EVENT_HANGUP:
2367                 if (option_verbose > 2)
2368                         ast_verbose(VERBOSE_PREFIX_3 "Hangup on channel %d\n", p->channel);
2369                 break;
2370         case MFCR2_EVENT_RINGING:
2371                 if (option_verbose > 2)
2372                         ast_verbose(VERBOSE_PREFIX_3 "Ringing on channel %d\n", p->channel);
2373                 break;
2374         case MFCR2_EVENT_ANSWER:
2375                 if (option_verbose > 2)
2376                         ast_verbose(VERBOSE_PREFIX_3 "Answer on channel %d\n", p->channel);
2377                 break;
2378         case MFCR2_EVENT_HANGUP_ACK:
2379                 if (option_verbose > 2)
2380                         ast_verbose(VERBOSE_PREFIX_3 "Hangup ACK on channel %d\n", p->channel);
2381                 break;
2382         case MFCR2_EVENT_IDLE:
2383                 if (option_verbose > 2)
2384                         ast_verbose(VERBOSE_PREFIX_3 "Idle on channel %d\n", p->channel);
2385                 break;
2386         default:
2387                 ast_log(LOG_WARNING, "Unknown MFC/R2 event %d\n", e->e);
2388                 break;
2389         }
2390         return f;
2391 }
2392
2393 static mfcr2_event_t *r2_get_event_bits(struct zt_pvt *p)
2394 {
2395         int x;
2396         int res;
2397         mfcr2_event_t *e;
2398         res = ioctl(p->subs[SUB_REAL].zfd, ZT_GETRXBITS, &x);
2399         if (res) {
2400                 ast_log(LOG_WARNING, "Unable to check received bits\n");
2401                 return NULL;
2402         }
2403         if (!p->r2) {
2404                 ast_log(LOG_WARNING, "Odd, no R2 structure on channel %d\n", p->channel);
2405                 return NULL;
2406         }
2407         e = mfcr2_cas_signaling_event(p->r2, x);
2408         return e;
2409 }
2410 #endif
2411
2412 static int check_for_conference(struct zt_pvt *p)
2413 {
2414         ZT_CONFINFO ci;
2415         /* Fine if we already have a master, etc */
2416         if (p->master || (p->confno > -1))
2417                 return 0;
2418         memset(&ci, 0, sizeof(ci));
2419         if (ioctl(p->subs[SUB_REAL].zfd, ZT_GETCONF, &ci)) {
2420                 ast_log(LOG_WARNING, "Failed to get conference info on channel %d\n", p->channel);
2421                 return 0;
2422         }
2423         /* If we have no master and don't have a confno, then 
2424            if we're in a conference, it's probably a MeetMe room or
2425            some such, so don't let us 3-way out! */
2426         if (ci.confno) {
2427                 if (option_verbose > 2) 
2428                         ast_verbose(VERBOSE_PREFIX_3 "Avoiding 3-way call when in an external conference\n");
2429                 return 1;
2430         }
2431         return 0;
2432 }
2433
2434 static int get_alarms(struct zt_pvt *p)
2435 {
2436         int res;
2437         ZT_SPANINFO zi;
2438         memset(&zi, 0, sizeof(zi));
2439         zi.spanno = p->span;
2440         res = ioctl(p->subs[SUB_REAL].zfd, ZT_SPANSTAT, &zi);
2441         if (res < 0) {
2442                 ast_log(LOG_WARNING, "Unable to determine alarm on channel %d\n", p->channel);
2443                 return 0;
2444         }
2445         return zi.alarms;
2446 }
2447                         
2448 static struct ast_frame *zt_handle_event(struct ast_channel *ast)
2449 {
2450         int res,x;
2451         int index;
2452         struct zt_pvt *p = ast->pvt->pvt;
2453         pthread_t threadid;
2454         pthread_attr_t attr;
2455         struct ast_channel *chan;
2456         pthread_attr_init(&attr);
2457         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
2458         index = zt_get_index(ast, p, 0);
2459         p->subs[index].f.frametype = AST_FRAME_NULL;
2460         p->subs[index].f.datalen = 0;
2461         p->subs[index].f.samples = 0;
2462         p->subs[index].f.mallocd = 0;
2463         p->subs[index].f.offset = 0;
2464         p->subs[index].f.src = "zt_handle_event";
2465         p->subs[index].f.data = NULL;
2466         if (index < 0)
2467                 return &p->subs[index].f;
2468         res = zt_get_event(p->subs[index].zfd);
2469         ast_log(LOG_DEBUG, "Got event %s(%d) on channel %d (index %d)\n", event2str(res), res, p->channel, index);
2470         if (res & (ZT_EVENT_PULSEDIGIT | ZT_EVENT_DTMFDIGIT)) {
2471                 if (res & ZT_EVENT_PULSEDIGIT)
2472                         p->pulsedial = 1;
2473                 else
2474                         p->pulsedial = 0;
2475                 ast_log(LOG_DEBUG, "Pulse dial '%c'\n", res & 0xff);
2476                 p->subs[index].f.frametype = AST_FRAME_DTMF;
2477                 p->subs[index].f.subclass = res & 0xff;
2478                 /* Return the captured digit */
2479                 return &p->subs[index].f;
2480         }
2481         switch(res) {
2482                 case ZT_EVENT_BITSCHANGED:
2483                         if (p->sig == SIG_R2) {
2484 #ifdef ZAPATA_R2
2485                                 struct ast_frame  *f = &p->subs[index].f;
2486                                 mfcr2_event_t *e;
2487                                 e = r2_get_event_bits(p);
2488                                 if (e)
2489                                         f = handle_r2_event(p, e, index);
2490                                 return f;
2491 #else                           
2492                                 break;
2493 #endif
2494                         }
2495                         ast_log(LOG_WARNING, "Recieved bits changed on %s signalling?\n", sig2str(p->sig));
2496                 case ZT_EVENT_PULSE_START:
2497                         /* Stop tone if there's a pulse start and the PBX isn't started */
2498                         if (!ast->pbx)
2499                                 tone_zone_play_tone(p->subs[index].zfd, -1);
2500                         break;  
2501                 case ZT_EVENT_DIALCOMPLETE:
2502                         if (p->inalarm) break;
2503                         if (p->radio) break;
2504                         if (ioctl(p->subs[index].zfd,ZT_DIALING,&x) == -1) {
2505                                 ast_log(LOG_DEBUG, "ZT_DIALING ioctl failed on %s\n",ast->name);
2506                                 return NULL;
2507                         }
2508                         if (!x) { /* if not still dialing in driver */
2509                                 zt_enable_ec(p);
2510                                 p->dialing = 0;
2511                                 if (ast->_state == AST_STATE_DIALING) {
2512                                         if (p->callprogress && CANPROGRESSDETECT(p) && p->dsp) {
2513                                                 ast_log(LOG_DEBUG, "Done dialing, but waiting for progress detection before doing more...\n");
2514                                         } else if (p->confirmanswer || (!p->dialednone && ((p->sig == SIG_EM) || (p->sig == SIG_EMWINK) || (p->sig == SIG_FEATD) || (p->sig == SIG_FEATDMF) || (p->sig == SIG_FEATB) || (p->sig == SIG_SF) || (p->sig == SIG_SFWINK) || (p->sig == SIG_SF_FEATD) || (p->sig == SIG_SF_FEATDMF) || (p->sig == SIG_SF_FEATB)))) {
2515                                                 ast_setstate(ast, AST_STATE_RINGING);
2516                                         } else {
2517                                                 ast_setstate(ast, AST_STATE_UP);
2518                                                 p->subs[index].f.frametype = AST_FRAME_CONTROL;
2519                                                 p->subs[index].f.subclass = AST_CONTROL_ANSWER;
2520                                         }
2521                                 }
2522                         }
2523                         break;
2524                 case ZT_EVENT_ALARM:
2525                         p->inalarm = 1;
2526                         res = get_alarms(p);
2527                         ast_log(LOG_WARNING, "Detected alarm on channel %d: %s\n", p->channel, alarm2str(res));
2528                         /* fall through intentionally */
2529                 case ZT_EVENT_ONHOOK:
2530                         if (p->radio)
2531                         {
2532                                 p->subs[index].f.frametype = AST_FRAME_CONTROL;
2533                                 p->subs[index].f.subclass = AST_CONTROL_RADIO_UNKEY;
2534                                 break;
2535                         }
2536                         switch(p->sig) {
2537                         case SIG_FXOLS:
2538                         case SIG_FXOGS:
2539                         case SIG_FXOKS:
2540                                 p->onhooktime = time(NULL);
2541                                 p->msgstate = -1;
2542                                 /* Check for some special conditions regarding call waiting */
2543                                 if (index == SUB_REAL) {
2544                                         /* The normal line was hung up */
2545                                         if (p->subs[SUB_CALLWAIT].owner) {
2546                                                 /* There's a call waiting call, so ring the phone, but make it unowned in the mean time */
2547                                                 swap_subs(p, SUB_CALLWAIT, SUB_REAL);
2548                                                 if (option_verbose > 2) 
2549                                                         ast_verbose(VERBOSE_PREFIX_3 "Channel %d still has (callwait) call, ringing phone\n", p->channel);
2550                                                 unalloc_sub(p, SUB_CALLWAIT);   
2551 #if 0
2552                                                 p->subs[index].needanswer = 0;
2553                                                 p->subs[index].needringing = 0;
2554 #endif                                          
2555                                                 p->callwaitingrepeat = 0;
2556                                                 p->cidcwexpire = 0;
2557                                                 p->owner = NULL;
2558                                                 zt_ring_phone(p);
2559                                         } else if (p->subs[SUB_THREEWAY].owner) {
2560                                                 struct timeval tv;
2561                                                 unsigned int mssinceflash;
2562                                                 gettimeofday(&tv, NULL);
2563                                                 mssinceflash = (tv.tv_sec - p->flashtime.tv_sec) * 1000 + (tv.tv_usec - p->flashtime.tv_usec) / 1000;
2564                                                 ast_log(LOG_DEBUG, "Last flash was %d ms ago\n", mssinceflash);
2565                                                 if (mssinceflash < MIN_MS_SINCE_FLASH) {
2566                                                         /* It hasn't been long enough since the last flashook.  This is probably a bounce on 
2567                                                            hanging up.  Hangup both channels now */
2568                                                         if (p->subs[SUB_THREEWAY].owner)
2569                                                                 ast_queue_hangup(p->subs[SUB_THREEWAY].owner, 0);
2570                                                         p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2571                                                         ast_log(LOG_DEBUG, "Looks like a bounced flash, hanging up both calls on %d\n", p->channel);
2572                                                 } else if ((ast->pbx) ||
2573                                                         (ast->_state == AST_STATE_UP)) {
2574                                                         if (p->transfer) {
2575                                                                 /* In any case this isn't a threeway call anymore */
2576                                                                 p->subs[SUB_REAL].inthreeway = 0;
2577                                                                 p->subs[SUB_THREEWAY].inthreeway = 0;
2578                                                                 if ((res = attempt_transfer(p)) < 0)
2579                                                                         p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2580                                                                 else if (res) {
2581                                                                         /* Don't actually hang up at this point */
2582                                                                         break;
2583                                                                 }
2584                                                         } else
2585                                                                 p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2586                                                 } else {
2587                                                         /* Swap subs and dis-own channel */
2588                                                         swap_subs(p, SUB_THREEWAY, SUB_REAL);
2589                                                         p->owner = NULL;
2590                                                         /* Ring the phone */
2591                                                         zt_ring_phone(p);
2592                                                 }
2593                                         }
2594                                 } else {
2595                                         ast_log(LOG_WARNING, "Got a hangup and my index is %d?\n", index);
2596                                 }
2597                                 /* Fall through */
2598                         default:
2599                                 zt_disable_ec(p);
2600                                 return NULL;
2601                         }
2602                         break;
2603                 case ZT_EVENT_RINGOFFHOOK:
2604                         if (p->inalarm) break;
2605                         if (p->radio)
2606                         {
2607                                 p->subs[index].f.frametype = AST_FRAME_CONTROL;
2608                                 p->subs[index].f.subclass = AST_CONTROL_RADIO_KEY;
2609                                 break;
2610                         }
2611                         switch(p->sig) {
2612                         case SIG_FXOLS:
2613                         case SIG_FXOGS:
2614                         case SIG_FXOKS:
2615                                 switch(ast->_state) {
2616                                 case AST_STATE_RINGING:
2617                                         zt_enable_ec(p);
2618                                         p->subs[index].f.frametype = AST_FRAME_CONTROL;
2619                                         p->subs[index].f.subclass = AST_CONTROL_ANSWER;
2620                                         /* Make sure it stops ringing */
2621                                         zt_set_hook(p->subs[index].zfd, ZT_OFFHOOK);
2622                                         ast_log(LOG_DEBUG, "channel %d answered\n", p->channel);
2623                                         if (p->cidspill) {
2624                                                 /* Cancel any running CallerID spill */
2625                                                 free(p->cidspill);
2626                                                 p->cidspill = NULL;
2627                                         }
2628                                         p->dialing = 0;
2629                                         p->callwaitcas = 0;
2630                                         if (p->confirmanswer) {
2631                                                 /* Ignore answer if "confirm answer" is selected */
2632                                                 p->subs[index].f.frametype = AST_FRAME_NULL;
2633                                                 p->subs[index].f.subclass = 0;
2634                                         } else if (strlen(p->dop.dialstr)) {
2635                                                 /* nick@dccinc.com 4/3/03 - fxo should be able to do deferred dialing */
2636                                                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_DIAL, &p->dop);
2637                                                 if (res < 0) {
2638                                                   ast_log(LOG_WARNING, "Unable to initiate dialing on trunk channel %d\n", p->channel);
2639                                                   p->dop.dialstr[0] = '\0';
2640                                                   return NULL;
2641                                                 } else {
2642                                                   ast_log(LOG_DEBUG, "Sent FXO deferred digit string: %s\n", p->dop.dialstr);
2643                                                   p->subs[index].f.frametype = AST_FRAME_NULL;
2644                                                   p->subs[index].f.subclass = 0;
2645                                                   p->dialing = 1;
2646                                                 }
2647                                                 p->dop.dialstr[0] = '\0';
2648                                            ast_setstate(ast, AST_STATE_DIALING);
2649                                         } else
2650                                            ast_setstate(ast, AST_STATE_UP);
2651                                         return &p->subs[index].f;
2652                                 case AST_STATE_DOWN:
2653                                         ast_setstate(ast, AST_STATE_RING);
2654                                         ast->rings = 1;
2655                                         p->subs[index].f.frametype = AST_FRAME_CONTROL;
2656                                         p->subs[index].f.subclass = AST_CONTROL_OFFHOOK;
2657                                         ast_log(LOG_DEBUG, "channel %d picked up\n", p->channel);
2658                                         return &p->subs[index].f;
2659                                 case AST_STATE_UP:
2660                                         /* Make sure it stops ringing */
2661                                         zt_set_hook(p->subs[index].zfd, ZT_OFFHOOK);
2662                                         /* Okay -- probably call waiting*/
2663                                         if (p->owner->bridge)
2664                                                         ast_moh_stop(p->owner->bridge);
2665                                         break;
2666                                 default:
2667                                         ast_log(LOG_WARNING, "FXO phone off hook in weird state %d??\n", ast->_state);
2668                                 }
2669                                 break;
2670                         case SIG_FXSLS:
2671                         case SIG_FXSGS:
2672                         case SIG_FXSKS:
2673                                 if (ast->_state == AST_STATE_RING) {
2674                                         p->ringt = RINGT;
2675                                 }
2676                                 /* Fall through */
2677                         case SIG_EM:
2678                         case SIG_EMWINK:
2679                         case SIG_FEATD:
2680                         case SIG_FEATDMF:
2681                         case SIG_FEATB:
2682                         case SIG_SF:
2683                         case SIG_SFWINK:
2684                         case SIG_SF_FEATD:
2685                         case SIG_SF_FEATDMF:
2686                         case SIG_SF_FEATB:
2687                                 if (ast->_state == AST_STATE_DOWN) {
2688                                         if (option_debug)
2689                                                 ast_log(LOG_DEBUG, "Ring detected\n");
2690                                         p->subs[index].f.frametype = AST_FRAME_CONTROL;
2691                                         p->subs[index].f.subclass = AST_CONTROL_RING;
2692                                 } else if (p->outgoing && ((ast->_state == AST_STATE_RINGING) || (ast->_state == AST_STATE_DIALING))) {
2693                                         if (option_debug)
2694                                                 ast_log(LOG_DEBUG, "Line answered\n");
2695                                         if (p->confirmanswer) {
2696                                                 p->subs[index].f.frametype = AST_FRAME_NULL;
2697                                                 p->subs[index].f.subclass = 0;
2698                                         } else {
2699                                                 p->subs[index].f.frametype = AST_FRAME_CONTROL;
2700                                                 p->subs[index].f.subclass = AST_CONTROL_ANSWER;
2701                                                 ast_setstate(ast, AST_STATE_UP);
2702                                         }
2703                                 } else if (ast->_state != AST_STATE_RING)
2704                                         ast_log(LOG_WARNING, "Ring/Off-hook in strange state %d on channel %d\n", ast->_state, p->channel);
2705                                 break;
2706                         default:
2707                                 ast_log(LOG_WARNING, "Don't know how to handle ring/off hoook for signalling %d\n", p->sig);
2708                         }
2709                         break;
2710                 case ZT_EVENT_RINGEROFF:
2711                         if (p->inalarm) break;
2712                         if (p->radio) break;
2713                         ast->rings++;
2714                         if ((ast->rings > p->cidrings) && (p->cidspill)) {
2715                                 ast_log(LOG_WARNING, "Didn't finish Caller-ID spill.  Cancelling.\n");
2716                                 free(p->cidspill);
2717                                 p->cidspill = NULL;
2718                                 p->callwaitcas = 0;
2719                         }
2720                         p->subs[index].f.frametype = AST_FRAME_CONTROL;
2721                         p->subs[index].f.subclass = AST_CONTROL_RINGING;
2722                         break;
2723                 case ZT_EVENT_RINGERON:
2724                         break;
2725                 case ZT_EVENT_NOALARM:
2726                         p->inalarm = 0;
2727                         ast_log(LOG_NOTICE, "Alarm cleared on channel %d\n", p->channel);
2728                         break;
2729                 case ZT_EVENT_WINKFLASH:
2730                         if (p->inalarm) break;
2731                         if (p->radio) break;
2732                         /* Remember last time we got a flash-hook */
2733                         gettimeofday(&p->flashtime, NULL);
2734                         switch(p->sig) {
2735                         case SIG_FXOLS:
2736                         case SIG_FXOGS:
2737                         case SIG_FXOKS:
2738                                 ast_log(LOG_DEBUG, "Winkflash, index: %d, normal: %d, callwait: %d, thirdcall: %d\n",
2739                                         index, p->subs[SUB_REAL].zfd, p->subs[SUB_CALLWAIT].zfd, p->subs[SUB_THREEWAY].zfd);
2740                                 p->callwaitcas = 0;
2741                                 if (index == SUB_REAL) {
2742                                         if (p->subs[SUB_CALLWAIT].owner) {
2743                                                 /* Swap to call-wait */
2744                                                 swap_subs(p, SUB_REAL, SUB_CALLWAIT);
2745                                                 tone_zone_play_tone(p->subs[SUB_REAL].zfd, -1);
2746                                                 p->owner = p->subs[SUB_REAL].owner;
2747                                                 ast_log(LOG_DEBUG, "Making %s the new owner\n", p->owner->name);
2748                                                 if (p->owner->_state == AST_STATE_RINGING) {
2749                                                         ast_setstate(p->owner, AST_STATE_UP);
2750                                                         p->subs[SUB_REAL].needanswer = 1;
2751                                                 }
2752                                                 p->callwaitingrepeat = 0;
2753                                                 p->cidcwexpire = 0;
2754                                                 /* Start music on hold if appropriate */
2755                                                 if (!p->subs[SUB_CALLWAIT].inthreeway && p->subs[SUB_CALLWAIT].owner->bridge)
2756                                                                 ast_moh_start(p->subs[SUB_CALLWAIT].owner->bridge, NULL);
2757                                                 if (p->subs[SUB_REAL].owner->bridge)
2758                                                                 ast_moh_stop(p->subs[SUB_REAL].owner->bridge);
2759                                         } else if (!p->subs[SUB_THREEWAY].owner) {
2760                                                 if (p->threewaycalling && !check_for_conference(p)) {
2761                                                         /* XXX This section needs much more error checking!!! XXX */
2762                                                         /* Start a 3-way call if feasible */
2763                                                         if ((ast->pbx) ||
2764                                                                         (ast->_state == AST_STATE_UP) ||
2765                                                                         (ast->_state == AST_STATE_RING)) {
2766                                                                 if (!alloc_sub(p, SUB_THREEWAY)) {
2767                                                                         /* Make new channel */
2768                                                                         chan = zt_new(p, AST_STATE_RESERVED, 0, SUB_THREEWAY, 0);
2769                                                                         /* Swap things around between the three-way and real call */
2770                                                                         swap_subs(p, SUB_THREEWAY, SUB_REAL);
2771                                                                         /* Disable echo canceller for better dialing */
2772                                                                         zt_disable_ec(p);
2773                                                                         res = tone_zone_play_tone(p->subs[SUB_REAL].zfd, ZT_TONE_DIALRECALL);
2774                                                                         if (res)
2775                                                                                 ast_log(LOG_WARNING, "Unable to start dial recall tone on channel %d\n", p->channel);
2776                                                                         p->owner = chan;
2777                                                                         if (pthread_create(&threadid, &attr, ss_thread, chan)) {
2778                                                                                 ast_log(LOG_WARNING, "Unable to start simple switch on channel %d\n", p->channel);
2779                                                                                 res = tone_zone_play_tone(p->subs[SUB_REAL].zfd, ZT_TONE_CONGESTION);
2780                                                                                 zt_enable_ec(p);
2781                                                                                 ast_hangup(chan);
2782                                                                         } else {
2783                                                                                 if (option_verbose > 2) 
2784                                                                                         ast_verbose(VERBOSE_PREFIX_3 "Started three way call on channel %d\n", p->channel);
2785                                                                                 /* Start music on hold if appropriate */
2786                                                                                 if (p->subs[SUB_THREEWAY].owner->bridge)
2787                                                                                         ast_moh_start(p->subs[SUB_THREEWAY].owner->bridge, NULL);
2788                                                                         }               
2789                                                                 } else
2790                                                                         ast_log(LOG_WARNING, "Unable to allocate three-way subchannel\n");
2791                                                         } else 
2792                                                                 ast_log(LOG_DEBUG, "Flash when call not up or ringing\n");
2793                                                 }
2794                                         } else {
2795                                                 /* Already have a 3 way call */
2796                                                 if (p->subs[SUB_THREEWAY].inthreeway) {
2797                                                         /* Call is already up, drop the last person */
2798                                                         if (option_debug)
2799                                                                 ast_log(LOG_DEBUG, "Got flash with three way call up, dropping last call on %d\n", p->channel);
2800                                                         /* If the primary call isn't answered yet, use it */
2801                                                         if ((p->subs[SUB_REAL].owner->_state != AST_STATE_UP) && (p->subs[SUB_THREEWAY].owner->_state == AST_STATE_UP)) {
2802                                                                 /* Swap back -- we're droppign the real 3-way that isn't finished yet*/
2803                                                                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
2804                                                                 p->owner = p->subs[SUB_REAL].owner;
2805                                                         }
2806                                                         /* Drop the last call and stop the conference */
2807                                                         if (option_verbose > 2)
2808                                                                 ast_verbose(VERBOSE_PREFIX_3 "Dropping three-way call on %s\n", p->subs[SUB_THREEWAY].owner->name);
2809                                                         p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2810                                                         p->subs[SUB_REAL].inthreeway = 0;
2811                                                         p->subs[SUB_THREEWAY].inthreeway = 0;
2812                                                 } else {
2813                                                         /* Lets see what we're up to */
2814                                                         if ((ast->pbx) ||
2815                                                                         (ast->_state == AST_STATE_UP)) {
2816                                                                 int otherindex = SUB_THREEWAY;
2817                                                                 if (option_verbose > 2)
2818                                                                         ast_verbose(VERBOSE_PREFIX_3 "Building conference on call on %s and %s\n", p->subs[SUB_THREEWAY].owner->name, p->subs[SUB_REAL].owner->name);
2819                                                                 /* Put them in the threeway, and flip */
2820                                                                 p->subs[SUB_THREEWAY].inthreeway = 1;
2821                                                                 p->subs[SUB_REAL].inthreeway = 1;
2822                                                                 if (ast->_state == AST_STATE_UP) {
2823                                                                         swap_subs(p, SUB_THREEWAY, SUB_REAL);
2824                                                                         otherindex = SUB_REAL;
2825                                                                 }