Fix the flash/*0 when incoming call comes on FXO -> FXS
[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                 x = p->echocancel;
911                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_ECHOCANCEL, &x);
912                 if (res) 
913                         ast_log(LOG_WARNING, "Unable to enable echo cancellation on channel %d\n", p->channel);
914                 else {
915                         p->echocanon = 1;
916                         ast_log(LOG_DEBUG, "Enabled echo cancellation on channel %d\n", p->channel);
917                 }
918         } else
919                 ast_log(LOG_DEBUG, "No echocancellation requested\n");
920 }
921
922 static void zt_disable_ec(struct zt_pvt *p)
923 {
924         int x;
925         int res;
926         if (p->echocancel) {
927                 x = 0;
928                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_ECHOCANCEL, &x);
929                 if (res) 
930                         ast_log(LOG_WARNING, "Unable to disable echo cancellation on channel %d\n", p->channel);
931                 else
932                         ast_log(LOG_DEBUG, "disabled echo cancellation on channel %d\n", p->channel);
933         }
934         p->echocanon = 0;
935 }
936
937 int set_actual_gain(int fd, int chan, float rxgain, float txgain, int law)
938 {
939         struct  zt_gains g;
940         float ltxgain;
941         float lrxgain;
942         int j,k;
943         g.chan = chan;
944         if ((rxgain != 0.0)  || (txgain != 0.0)) {
945                 /* caluculate linear value of tx gain */
946                 ltxgain = pow(10.0,txgain / 20.0);
947                 /* caluculate linear value of rx gain */
948                 lrxgain = pow(10.0,rxgain / 20.0);
949                 if (law == ZT_LAW_ALAW) {
950                         for (j=0;j<256;j++) {
951                                 k = (int)(((float)AST_ALAW(j)) * lrxgain);
952                                 if (k > 32767) k = 32767;
953                                 if (k < -32767) k = -32767;
954                                 g.rxgain[j] = AST_LIN2A(k);
955                                 k = (int)(((float)AST_ALAW(j)) * ltxgain);
956                                 if (k > 32767) k = 32767;
957                                 if (k < -32767) k = -32767;
958                                 g.txgain[j] = AST_LIN2A(k);
959                         }
960                 } else {
961                         for (j=0;j<256;j++) {
962                                 k = (int)(((float)AST_MULAW(j)) * lrxgain);
963                                 if (k > 32767) k = 32767;
964                                 if (k < -32767) k = -32767;
965                                 g.rxgain[j] = AST_LIN2MU(k);
966                                 k = (int)(((float)AST_MULAW(j)) * ltxgain);
967                                 if (k > 32767) k = 32767;
968                                 if (k < -32767) k = -32767;
969                                 g.txgain[j] = AST_LIN2MU(k);
970                         }
971                 }
972         } else {
973                 for (j=0;j<256;j++) {
974                         g.rxgain[j] = j;
975                         g.txgain[j] = j;
976                 }
977         }
978                 
979           /* set 'em */
980         return(ioctl(fd,ZT_SETGAINS,&g));
981 }
982
983 static inline int zt_set_hook(int fd, int hs)
984 {
985         int x, res;
986         x = hs;
987         res = ioctl(fd, ZT_HOOK, &x);
988         if (res < 0) 
989         {
990                 if (errno == EINPROGRESS) return 0;
991                 ast_log(LOG_WARNING, "zt hook failed: %s\n", strerror(errno));
992         }
993         return res;
994 }
995
996 static inline int zt_confmute(struct zt_pvt *p, int muted)
997 {
998         int x, res;
999         x = muted;
1000         res = ioctl(p->subs[SUB_REAL].zfd, ZT_CONFMUTE, &x);
1001         if (res < 0) 
1002                 ast_log(LOG_WARNING, "zt confmute(%d) failed on channel %d: %s\n", muted, p->channel, strerror(errno));
1003         return res;
1004 }
1005
1006 static int save_conference(struct zt_pvt *p)
1007 {
1008         struct zt_confinfo c;
1009         int res;
1010         if (p->saveconf.confmode) {
1011                 ast_log(LOG_WARNING, "Can't save conference -- already in use\n");
1012                 return -1;
1013         }
1014         p->saveconf.chan = 0;
1015         res = ioctl(p->subs[SUB_REAL].zfd, ZT_GETCONF, &p->saveconf);
1016         if (res) {
1017                 ast_log(LOG_WARNING, "Unable to get conference info: %s\n", strerror(errno));
1018                 p->saveconf.confmode = 0;
1019                 return -1;
1020         }
1021         c.chan = 0;
1022         c.confno = 0;
1023         c.confmode = ZT_CONF_NORMAL;
1024         res = ioctl(p->subs[SUB_REAL].zfd, ZT_SETCONF, &c);
1025         if (res) {
1026                 ast_log(LOG_WARNING, "Unable to set conference info: %s\n", strerror(errno));
1027                 return -1;
1028         }
1029         if (option_debug)
1030                 ast_log(LOG_DEBUG, "Disabled conferencing\n");
1031         return 0;
1032 }
1033
1034 static int restore_conference(struct zt_pvt *p)
1035 {
1036         int res;
1037         if (p->saveconf.confmode) {
1038                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_SETCONF, &p->saveconf);
1039                 p->saveconf.confmode = 0;
1040                 if (res) {
1041                         ast_log(LOG_WARNING, "Unable to restore conference info: %s\n", strerror(errno));
1042                         return -1;
1043                 }
1044         }
1045         if (option_debug)
1046                 ast_log(LOG_DEBUG, "Restored conferencing\n");
1047         return 0;
1048 }
1049
1050 static int send_callerid(struct zt_pvt *p);
1051
1052 int send_cwcidspill(struct zt_pvt *p)
1053 {
1054         p->callwaitcas = 0;
1055         p->cidcwexpire = 0;
1056         p->cidspill = malloc(MAX_CALLERID_SIZE);
1057         if (p->cidspill) {
1058                 memset(p->cidspill, 0x7f, MAX_CALLERID_SIZE);
1059                 p->cidlen = ast_callerid_callwaiting_generate(p->cidspill, p->callwaitcid, AST_LAW(p));
1060                 /* Make sure we account for the end */
1061                 p->cidlen += READ_SIZE * 4;
1062                 p->cidpos = 0;
1063                 send_callerid(p);
1064                 if (option_verbose > 2)
1065                         ast_verbose(VERBOSE_PREFIX_3 "CPE supports Call Waiting Caller*ID.  Sending '%s'\n", p->callwaitcid);
1066         } else return -1;
1067         return 0;
1068 }
1069
1070 static int has_voicemail(struct zt_pvt *p)
1071 {
1072
1073         return ast_app_has_voicemail(p->mailbox);
1074 }
1075
1076 static int send_callerid(struct zt_pvt *p)
1077 {
1078         /* Assumes spill in p->cidspill, p->cidlen in length and we're p->cidpos into it */
1079         int res;
1080         /* Take out of linear mode if necessary */
1081         if (p->subs[SUB_REAL].linear) {
1082                 p->subs[SUB_REAL].linear = 0;
1083                 zt_setlinear(p->subs[SUB_REAL].zfd, 0);
1084         }
1085         while(p->cidpos < p->cidlen) {
1086                 res = write(p->subs[SUB_REAL].zfd, p->cidspill + p->cidpos, p->cidlen - p->cidpos);
1087                 if (res < 0) {
1088                         if (errno == EAGAIN)
1089                                 return 0;
1090                         else {
1091                                 ast_log(LOG_WARNING, "write failed: %s\n", strerror(errno));
1092                                 return -1;
1093                         }
1094                 }
1095                 if (!res)
1096                         return 0;
1097                 p->cidpos += res;
1098         }
1099         free(p->cidspill);
1100         p->cidspill = NULL;
1101         if (p->callwaitcas) {
1102                 /* Wait for CID/CW to expire */
1103                 p->cidcwexpire = CIDCW_EXPIRE_SAMPLES;
1104         } else
1105                 restore_conference(p);
1106         return 0;
1107 }
1108
1109 static int zt_callwait(struct ast_channel *ast)
1110 {
1111         struct zt_pvt *p = ast->pvt->pvt;
1112         p->callwaitingrepeat = CALLWAITING_REPEAT_SAMPLES;
1113         if (p->cidspill) {
1114                 ast_log(LOG_WARNING, "Spill already exists?!?\n");
1115                 free(p->cidspill);
1116         }
1117         p->cidspill = malloc(2400 /* SAS */ + 680 /* CAS */ + READ_SIZE * 4);
1118         if (p->cidspill) {
1119                 save_conference(p);
1120                 /* Silence */
1121                 memset(p->cidspill, 0x7f, 2400 + 600 + READ_SIZE * 4);
1122                 if (!p->callwaitrings && p->callwaitingcallerid) {
1123                         ast_gen_cas(p->cidspill, 1, 2400 + 680, AST_LAW(p));
1124                         p->callwaitcas = 1;
1125                         p->cidlen = 2400 + 680 + READ_SIZE * 4;
1126                 } else {
1127                         ast_gen_cas(p->cidspill, 1, 2400, AST_LAW(p));
1128                         p->callwaitcas = 0;
1129                         p->cidlen = 2400 + READ_SIZE * 4;
1130                 }
1131                 p->cidpos = 0;
1132                 send_callerid(p);
1133         } else {
1134                 ast_log(LOG_WARNING, "Unable to create SAS/CAS spill\n");
1135                 return -1;
1136         }
1137         return 0;
1138 }
1139
1140 static int zt_call(struct ast_channel *ast, char *rdest, int timeout)
1141 {
1142         struct zt_pvt *p = ast->pvt->pvt;
1143         int x, res, index;
1144         char *c, *n, *l;
1145         char *s;
1146         char callerid[256];
1147         char dest[256];
1148         strncpy(dest, rdest, sizeof(dest) - 1);
1149         if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
1150                 ast_log(LOG_WARNING, "zt_call called on %s, neither down nor reserved\n", ast->name);
1151                 return -1;
1152         }
1153         p->dialednone = 0;
1154         if (p->radio)  /* if a radio channel, up immediately */
1155         {
1156                 /* Special pseudo -- automatically up */
1157                 ast_setstate(ast, AST_STATE_UP); 
1158                 return 0;
1159         }
1160         x = ZT_FLUSH_READ | ZT_FLUSH_WRITE;
1161         res = ioctl(p->subs[SUB_REAL].zfd, ZT_FLUSH, &x);
1162         if (res)
1163                 ast_log(LOG_WARNING, "Unable to flush input on channel %d\n", p->channel);
1164         p->outgoing = 1;
1165
1166         switch(p->sig) {
1167         case SIG_FXOLS:
1168         case SIG_FXOGS:
1169         case SIG_FXOKS:
1170                 if (p->owner == ast) {
1171                         /* Normal ring, on hook */
1172                         
1173                         /* Don't send audio while on hook, until the call is answered */
1174                         p->dialing = 1;
1175                         if (p->use_callerid) {
1176                                 /* Generate the Caller-ID spill if desired */
1177                                 if (p->cidspill) {
1178                                         ast_log(LOG_WARNING, "cidspill already exists??\n");
1179                                         free(p->cidspill);
1180                                 }
1181                                 p->cidspill = malloc(MAX_CALLERID_SIZE);
1182                                 p->callwaitcas = 0;
1183                                 if (p->cidspill) {
1184                                         p->cidlen = ast_callerid_generate(p->cidspill, ast->callerid, AST_LAW(p));
1185                                         p->cidpos = 0;
1186                                         send_callerid(p);
1187                                 } else
1188                                         ast_log(LOG_WARNING, "Unable to generate CallerID spill\n");
1189                         }
1190                         /* Select proper cadence */
1191                         if ((p->distinctivering > 0) && (p->distinctivering <= NUM_CADENCE)) {
1192                                 if (ioctl(p->subs[SUB_REAL].zfd, ZT_SETCADENCE, &cadences[p->distinctivering-1]))
1193                                         ast_log(LOG_WARNING, "Unable to set distinctive ring cadence %d on '%s'\n", p->distinctivering, ast->name);
1194                                 p->cidrings = cidrings[p->distinctivering - 1];
1195                         } else {
1196                                 if (ioctl(p->subs[SUB_REAL].zfd, ZT_SETCADENCE, NULL))
1197                                         ast_log(LOG_WARNING, "Unable to reset default ring on '%s'\n", ast->name);
1198                                 p->cidrings = DEFAULT_CIDRINGS;
1199                         }
1200
1201
1202                         /* nick@dccinc.com 4/3/03 mods to allow for deferred dialing */
1203                         c = strchr(dest, '/');
1204                         if (c)
1205                           c++;
1206                         if (c && (strlen(c) < p->stripmsd)) {
1207                           ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
1208                           c = NULL;
1209                         }
1210                         if (c) {
1211                                 p->dop.op = ZT_DIAL_OP_REPLACE;
1212                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "Tw%s", c);
1213                                 ast_log(LOG_DEBUG, "FXO: setup deferred dialstring: %s\n", c);
1214                         } else {
1215                                 strcpy(p->dop.dialstr, "");
1216                         }
1217                         x = ZT_RING;
1218                         if (ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x) && (errno != EINPROGRESS)) {
1219                                 ast_log(LOG_WARNING, "Unable to ring phone: %s\n", strerror(errno));
1220                                 return -1;
1221                         }
1222                         p->dialing = 1;
1223                 } else {
1224                         /* Call waiting call */
1225                         p->callwaitrings = 0;
1226                         if (ast->callerid)
1227                                 strncpy(p->callwaitcid, ast->callerid, sizeof(p->callwaitcid)-1);
1228                         else
1229                                 strcpy(p->callwaitcid, "");
1230                         /* Call waiting tone instead */
1231                         if (zt_callwait(ast))
1232                                 return -1;
1233                         /* Make ring-back */
1234                         if (tone_zone_play_tone(p->subs[SUB_CALLWAIT].zfd, ZT_TONE_RINGTONE))
1235                                 ast_log(LOG_WARNING, "Unable to generate call-wait ring-back on channel %s\n", ast->name);
1236                                 
1237                 }
1238                 if (ast->callerid) 
1239                         strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1240                 else
1241                         strcpy(callerid, "");
1242                 ast_callerid_parse(callerid, &n, &l);
1243                 if (l) {
1244                         ast_shrink_phone_number(l);
1245                         if (!ast_isphonenumber(l))
1246                                 l = NULL;
1247                 }
1248                 if (l)
1249                         strcpy(p->lastcallerid, l);
1250                 else
1251                         strcpy(p->lastcallerid, "");
1252                 ast_setstate(ast, AST_STATE_RINGING);
1253                 index = zt_get_index(ast, p, 0);
1254                 if (index > -1) {
1255                         p->subs[index].needringing = 1;
1256                 }
1257                 break;
1258         case SIG_FXSLS:
1259         case SIG_FXSGS:
1260         case SIG_FXSKS:
1261         case SIG_EMWINK:
1262         case SIG_EM:
1263         case SIG_FEATD:
1264         case SIG_FEATDMF:
1265         case SIG_FEATB:
1266         case SIG_SFWINK:
1267         case SIG_SF:
1268         case SIG_SF_FEATD:
1269         case SIG_SF_FEATDMF:
1270         case SIG_SF_FEATB:
1271                 c = strchr(dest, '/');
1272                 if (c)
1273                         c++;
1274                 else
1275                         c = dest;
1276                 if (strlen(c) < p->stripmsd) {
1277                         ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
1278                         return -1;
1279                 }
1280                 x = ZT_START;
1281                 /* Start the trunk */
1282                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
1283                 if (res < 0) {
1284                         if (errno != EINPROGRESS) {
1285                                 ast_log(LOG_WARNING, "Unable to start channel: %s\n", strerror(errno));
1286                                 return -1;
1287                         }
1288                 }
1289                 ast_log(LOG_DEBUG, "Dialing '%s'\n", c);
1290                 p->dop.op = ZT_DIAL_OP_REPLACE;
1291                 if (p->sig == SIG_FEATD) {
1292                         if (ast->callerid) {
1293                                 strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1294                                 ast_callerid_parse(callerid, &n, &l);
1295                                 if (l) {
1296                                         ast_shrink_phone_number(l);
1297                                         if (!ast_isphonenumber(l))
1298                                                 l = NULL;
1299                                 }
1300                         } else
1301                                 l = NULL;
1302                         if (l) 
1303                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T*%s*%s*", l, c + p->stripmsd);
1304                         else
1305                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T**%s*", c + p->stripmsd);
1306                 } else 
1307                 if (p->sig == SIG_FEATDMF) {
1308                         if (ast->callerid) {
1309                                 strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1310                                 ast_callerid_parse(callerid, &n, &l);
1311                                 if (l) {
1312                                         ast_shrink_phone_number(l);
1313                                         if (!ast_isphonenumber(l))
1314                                                 l = NULL;
1315                                 }
1316                         } else
1317                                 l = NULL;
1318                         if (l) 
1319                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "M*00%s#*%s#", l, c + p->stripmsd);
1320                         else
1321                                 snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "M*02#*%s#", c + p->stripmsd);
1322                 } else 
1323                 if (p->sig == SIG_FEATB) {
1324                         snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "M*%s#", c + p->stripmsd);
1325                 } else 
1326                         snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T%s", c + p->stripmsd);
1327                 if (!res) {
1328                         if (ioctl(p->subs[SUB_REAL].zfd, ZT_DIAL, &p->dop)) {
1329                                 x = ZT_ONHOOK;
1330                                 ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
1331                                 ast_log(LOG_WARNING, "Dialing failed on channel %d: %s\n", p->channel, strerror(errno));
1332                                 return -1;
1333                         }
1334                 } else
1335                         ast_log(LOG_DEBUG, "Deferring dialing...\n");
1336                 p->dialing = 1;
1337                 if (strlen(c + p->stripmsd) < 1) p->dialednone = 1;
1338                 ast_setstate(ast, AST_STATE_DIALING);
1339                 break;
1340 #ifdef ZAPATA_PRI
1341         case SIG_PRI:
1342                 c = strchr(dest, '/');
1343                 if (c)
1344                         c++;
1345                 else
1346                         c = dest;
1347                 if (ast->callerid) {
1348                         strncpy(callerid, ast->callerid, sizeof(callerid)-1);
1349                         ast_callerid_parse(callerid, &n, &l);
1350                         if (l) {
1351                                 ast_shrink_phone_number(l);
1352                                 if (!ast_isphonenumber(l))
1353                                         l = NULL;
1354                         }
1355                 } else
1356                         l = NULL;
1357                 if (strlen(c) < p->stripmsd) {
1358                         ast_log(LOG_WARNING, "Number '%s' is shorter than stripmsd (%d)\n", c, p->stripmsd);
1359                         return -1;
1360                 }
1361                 p->dop.op = ZT_DIAL_OP_REPLACE;
1362                 s = strchr(c + p->stripmsd, 'w');
1363                 if (s) {
1364                         snprintf(p->dop.dialstr, sizeof(p->dop.dialstr), "T%s", s);
1365                         *s = '\0';
1366                 } else {
1367                         strcpy(p->dop.dialstr, "");
1368                 }
1369                 if (!(p->call = pri_new_call(p->pri->pri))) {
1370                         ast_log(LOG_WARNING, "Unable to create call on channel %d\n", p->channel);
1371                         return -1;
1372                 }
1373                 if (pri_call(p->pri->pri, p->call, p->digital ? PRI_TRANS_CAP_DIGITAL : PRI_TRANS_CAP_SPEECH, 
1374                         p->prioffset, p->pri->nodetype == PRI_NETWORK ? 0 : 1, 1, l, p->pri->dialplan - 1, n,
1375                         l ? PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN : PRES_NUMBER_NOT_AVAILABLE,
1376                         c + p->stripmsd, p->pri->dialplan - 1, 
1377                         ((p->law == ZT_LAW_ALAW) ? PRI_LAYER_1_ALAW : PRI_LAYER_1_ULAW))) {
1378                         ast_log(LOG_WARNING, "Unable to setup call to %s\n", c + p->stripmsd);
1379                         return -1;
1380                 }
1381                 ast_setstate(ast, AST_STATE_DIALING);
1382                 break;
1383 #endif          
1384         case 0:
1385                 /* Special pseudo -- automatically up*/
1386                 ast_setstate(ast, AST_STATE_UP);
1387                 break;          
1388         default:
1389                 ast_log(LOG_DEBUG, "not yet implemented\n");
1390                 return -1;
1391         }
1392         return 0;
1393 }
1394
1395 static int destroy_channel(struct zt_pvt *prev, struct zt_pvt *cur, int now)
1396 {
1397         int owned = 0;
1398         int i = 0;
1399
1400         if (!now) {
1401                 if (cur->owner) {
1402                         owned = 1;
1403                 }
1404
1405                 for (i = 0; i < 3; i++) {
1406                         if (cur->subs[i].owner) {
1407                                 owned = 1;
1408                         }
1409                 }
1410                 if (!owned) {
1411                         if (prev) {
1412                                 prev->next = cur->next;
1413                         } else {
1414                                 iflist = cur->next;
1415                         }
1416                         if (cur->subs[SUB_REAL].zfd > -1) {
1417                                 zt_close(cur->subs[SUB_REAL].zfd);
1418                         }
1419                         free(cur);
1420                 }
1421         } else {
1422                 if (prev) {
1423                         prev->next = cur->next;
1424                 } else {
1425                         iflist = cur->next;
1426                 }
1427                 if (cur->subs[SUB_REAL].zfd > -1) {
1428                         zt_close(cur->subs[SUB_REAL].zfd);
1429                 }
1430                 free(cur);
1431         }
1432         return 0;
1433 }
1434
1435
1436 static int zt_hangup(struct ast_channel *ast)
1437 {
1438         int res;
1439         int index,x, law;
1440         static int restore_gains(struct zt_pvt *p);
1441         struct zt_pvt *p = ast->pvt->pvt;
1442         struct zt_pvt *tmp = NULL;
1443         struct zt_pvt *prev = NULL;
1444         ZT_PARAMS par;
1445
1446         if (option_debug)
1447                 ast_log(LOG_DEBUG, "zt_hangup(%s)\n", ast->name);
1448         if (!ast->pvt->pvt) {
1449                 ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
1450                 return 0;
1451         }
1452         
1453         ast_pthread_mutex_lock(&p->lock);
1454         
1455         index = zt_get_index(ast, p, 1);
1456
1457         if (p->sig == SIG_PRI) {
1458                 x = 0;
1459                 ast_channel_setoption(ast,AST_OPTION_AUDIO_MODE,&x,sizeof(char),0);
1460         }
1461
1462         restore_gains(p);
1463         
1464         if (p->dsp)
1465                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_DTMF | p->dtmfrelax);
1466
1467         x = 0;
1468         zt_confmute(p, 0);
1469
1470         ast_log(LOG_DEBUG, "Hangup: channel: %d index = %d, normal = %d, callwait = %d, thirdcall = %d\n",
1471                 p->channel, index, p->subs[SUB_REAL].zfd, p->subs[SUB_CALLWAIT].zfd, p->subs[SUB_THREEWAY].zfd);
1472         p->ignoredtmf = 0;
1473         
1474         if (index > -1) {
1475                 /* Real channel, do some fixup */
1476                 p->subs[index].owner = NULL;
1477                 p->subs[index].needanswer = 0;
1478                 p->subs[index].needringing = 0;
1479                 p->subs[index].linear = 0;
1480                 p->subs[index].needcallerid = 0;
1481                 zt_setlinear(p->subs[index].zfd, 0);
1482                 if (index == SUB_REAL) {
1483                         if ((p->subs[SUB_CALLWAIT].zfd > -1) && (p->subs[SUB_THREEWAY].zfd > -1)) {
1484                                 ast_log(LOG_DEBUG, "Normal call hung up with both three way call and a call waiting call in place?\n");
1485                                 if (p->subs[SUB_CALLWAIT].inthreeway) {
1486                                         /* We had flipped over to answer a callwait and now it's gone */
1487                                         ast_log(LOG_DEBUG, "We were flipped over to the callwait, moving back and unowning.\n");
1488                                         /* Move to the call-wait, but un-own us until they flip back. */
1489                                         swap_subs(p, SUB_CALLWAIT, SUB_REAL);
1490                                         unalloc_sub(p, SUB_CALLWAIT);
1491                                         p->owner = NULL;
1492                                 } else {
1493                                         /* The three way hung up, but we still have a call wait */
1494                                         ast_log(LOG_DEBUG, "We were in the threeway and have a callwait still.  Ditching the threeway.\n");
1495                                         swap_subs(p, SUB_THREEWAY, SUB_REAL);
1496                                         unalloc_sub(p, SUB_THREEWAY);
1497                                         if (p->subs[SUB_REAL].inthreeway) {
1498                                                 /* This was part of a three way call.  Immediately make way for
1499                                                    another call */
1500                                                 ast_log(LOG_DEBUG, "Call was complete, setting owner to former third call\n");
1501                                                 p->owner = p->subs[SUB_REAL].owner;
1502                                         } else {
1503                                                 /* This call hasn't been completed yet...  Set owner to NULL */
1504                                                 ast_log(LOG_DEBUG, "Call was incomplete, setting owner to NULL\n");
1505                                                 p->owner = NULL;
1506                                         }
1507                                         p->subs[SUB_REAL].inthreeway = 0;
1508                                 }
1509                         } else if (p->subs[SUB_CALLWAIT].zfd > -1) {
1510                                 /* Move to the call-wait and switch back to them. */
1511                                 swap_subs(p, SUB_CALLWAIT, SUB_REAL);
1512                                 unalloc_sub(p, SUB_CALLWAIT);
1513                                 p->owner = p->subs[SUB_REAL].owner;
1514                                 if (p->subs[SUB_REAL].owner->bridge)
1515                                         ast_moh_stop(p->subs[SUB_REAL].owner->bridge);
1516                         } else if (p->subs[SUB_THREEWAY].zfd > -1) {
1517                                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
1518                                 unalloc_sub(p, SUB_THREEWAY);
1519                                 if (p->subs[SUB_REAL].inthreeway) {
1520                                         /* This was part of a three way call.  Immediately make way for
1521                                            another call */
1522                                         ast_log(LOG_DEBUG, "Call was complete, setting owner to former third call\n");
1523                                         p->owner = p->subs[SUB_REAL].owner;
1524                                 } else {
1525                                         /* This call hasn't been completed yet...  Set owner to NULL */
1526                                         ast_log(LOG_DEBUG, "Call was incomplete, setting owner to NULL\n");
1527                                         p->owner = NULL;
1528                                 }
1529                                 p->subs[SUB_REAL].inthreeway = 0;
1530                         }
1531                 } else if (index == SUB_CALLWAIT) {
1532                         /* Ditch the holding callwait call, and immediately make it availabe */
1533                         if (p->subs[SUB_CALLWAIT].inthreeway) {
1534                                 /* This is actually part of a three way, placed on hold.  Place the third part
1535                                    on music on hold now */
1536                                 if (p->subs[SUB_THREEWAY].owner && p->subs[SUB_THREEWAY].owner->bridge)
1537                                         ast_moh_start(p->subs[SUB_THREEWAY].owner->bridge, NULL);
1538                                 p->subs[SUB_THREEWAY].inthreeway = 0;
1539                                 /* Make it the call wait now */
1540                                 swap_subs(p, SUB_CALLWAIT, SUB_THREEWAY);
1541                                 unalloc_sub(p, SUB_THREEWAY);
1542                         } else
1543                                 unalloc_sub(p, SUB_CALLWAIT);
1544                 } else if (index == SUB_THREEWAY) {
1545                         if (p->subs[SUB_CALLWAIT].inthreeway) {
1546                                 /* The other party of the three way call is currently in a call-wait state.
1547                                    Start music on hold for them, and take the main guy out of the third call */
1548                                 if (p->subs[SUB_CALLWAIT].owner && p->subs[SUB_CALLWAIT].owner->bridge)
1549                                         ast_moh_start(p->subs[SUB_CALLWAIT].owner->bridge, NULL);
1550                                 p->subs[SUB_CALLWAIT].inthreeway = 0;
1551                         }
1552                         p->subs[SUB_REAL].inthreeway = 0;
1553                         /* If this was part of a three way call index, let us make
1554                            another three way call */
1555                         unalloc_sub(p, SUB_THREEWAY);
1556                 } else {
1557                         /* This wasn't any sort of call, but how are we an index? */
1558                         ast_log(LOG_WARNING, "Index found but not any type of call?\n");
1559                 }
1560         }
1561
1562
1563         if (!p->subs[SUB_REAL].owner && !p->subs[SUB_CALLWAIT].owner && !p->subs[SUB_THREEWAY].owner) {
1564                 p->owner = NULL;
1565                 p->ringt = 0;
1566                 p->distinctivering = 0;
1567                 p->confirmanswer = 0;
1568                 p->cidrings = 1;
1569                 p->outgoing = 0;
1570                 p->digital = 0;
1571                 p->faxhandled = 0;
1572                 p->pulsedial = 0;
1573                 p->onhooktime = time(NULL);
1574 #ifdef PRI_EVENT_PROCEEDING
1575                 p->proceeding = 0;
1576 #endif
1577                 if (p->dsp) {
1578                         ast_dsp_free(p->dsp);
1579                         p->dsp = NULL;
1580                 }
1581                 law = ZT_LAW_DEFAULT;
1582                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_SETLAW, &law);
1583                 if (res < 0) 
1584                         ast_log(LOG_WARNING, "Unable to set law on channel %d to default\n", p->channel);
1585                 /* Perform low level hangup if no owner left */
1586 #ifdef ZAPATA_PRI
1587                 if (p->sig == SIG_PRI) {
1588                         if (p->call) {
1589                                 if (!pri_grab(p, p->pri)) {
1590                                         res = pri_disconnect(p->pri->pri, p->call, PRI_CAUSE_NORMAL_CLEARING);
1591                                         if (p->alreadyhungup) {
1592                                                 p->call = NULL;
1593                                                 p->alreadyhungup = 0;
1594                                         }
1595                                         if (res < 0) 
1596                                                 ast_log(LOG_WARNING, "pri_disconnect failed\n");
1597                                         pri_rel(p->pri);                        
1598                                 } else {
1599                                         ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
1600                                         res = -1;
1601                                 }
1602                         } else
1603                                 res = 0;
1604
1605                 } else 
1606 #endif
1607 #ifdef ZAPATA_R2
1608                 if (p->sig == SIG_R2) {
1609                         if (p->hasr2call) {
1610                                 mfcr2_DropCall(p->r2, NULL, UC_NORMAL_CLEARING);
1611                                 p->hasr2call = 0;
1612                                 res = 0;
1613                         } else
1614                                 res = 0;
1615
1616                 } else 
1617 #endif
1618                 if (p->sig)
1619                         res = zt_set_hook(p->subs[SUB_REAL].zfd, ZT_ONHOOK);
1620                 if (res < 0) {
1621                         ast_log(LOG_WARNING, "Unable to hangup line %s\n", ast->name);
1622                 }
1623                 switch(p->sig) {
1624                 case SIG_FXOGS:
1625                 case SIG_FXOLS:
1626                 case SIG_FXOKS:
1627                         res = ioctl(p->subs[SUB_REAL].zfd, ZT_GET_PARAMS, &par);
1628                         if (!res) {
1629 #if 0
1630                                 ast_log(LOG_DEBUG, "Hanging up channel %d, offhook = %d\n", p->channel, par.rxisoffhook);
1631 #endif
1632                                 /* If they're off hook, try playing congestion */
1633                                 if (par.rxisoffhook)
1634                                         tone_zone_play_tone(p->subs[SUB_REAL].zfd, ZT_TONE_CONGESTION);
1635                                 else
1636                                         tone_zone_play_tone(p->subs[SUB_REAL].zfd, -1);
1637                         }
1638                         break;
1639                 default:
1640                         tone_zone_play_tone(p->subs[SUB_REAL].zfd, -1);
1641                 }
1642                 if (p->cidspill)
1643                         free(p->cidspill);
1644                 if (p->sig)
1645                         zt_disable_ec(p);
1646                 x = 0;
1647                 ast_channel_setoption(ast,AST_OPTION_TONE_VERIFY,&x,sizeof(char),0);
1648                 ast_channel_setoption(ast,AST_OPTION_TDD,&x,sizeof(char),0);
1649                 p->didtdd = 0;
1650                 p->cidspill = NULL;
1651                 p->callwaitcas = 0;
1652                 p->callwaiting = p->permcallwaiting;
1653                 p->hidecallerid = p->permhidecallerid;
1654                 p->dialing = 0;
1655                 strcpy(p->rdnis, "");
1656                 update_conf(p);
1657                 restart_monitor();
1658         }
1659
1660
1661         p->callwaitingrepeat = 0;
1662         p->cidcwexpire = 0;
1663         ast->pvt->pvt = NULL;
1664         ast_pthread_mutex_unlock(&p->lock);
1665         ast_pthread_mutex_lock(&usecnt_lock);
1666         usecnt--;
1667         if (usecnt < 0) 
1668                 ast_log(LOG_WARNING, "Usecnt < 0???\n");
1669         ast_pthread_mutex_unlock(&usecnt_lock);
1670         ast_update_use_count();
1671         if (option_verbose > 2) 
1672                 ast_verbose( VERBOSE_PREFIX_3 "Hungup '%s'\n", ast->name);
1673
1674         ast_pthread_mutex_lock(&iflock);
1675         tmp = iflist;
1676         prev = NULL;
1677         if (p->destroy) {
1678                 while (tmp) {
1679                         if (tmp == p) {
1680                                 destroy_channel(prev, tmp, 0);
1681                                 break;
1682                         } else {
1683                                 prev = tmp;
1684                                 tmp = tmp->next;
1685                         }
1686                 }
1687         }
1688         ast_pthread_mutex_unlock(&iflock);
1689         return 0;
1690 }
1691
1692 static int zt_answer(struct ast_channel *ast)
1693 {
1694         struct zt_pvt *p = ast->pvt->pvt;
1695         int res=0;
1696         int index;
1697         int oldstate = ast->_state;
1698         ast_setstate(ast, AST_STATE_UP);
1699         ast_pthread_mutex_lock(&p->lock);
1700         index = zt_get_index(ast, p, 0);
1701         if (index < 0)
1702                 index = SUB_REAL;
1703         /* nothing to do if a radio channel */
1704         if (p->radio) {
1705                 ast_pthread_mutex_unlock(&p->lock);
1706                 return 0;
1707         }
1708         switch(p->sig) {
1709         case SIG_FXSLS:
1710         case SIG_FXSGS:
1711         case SIG_FXSKS:
1712                 p->ringt = 0;
1713                 /* Fall through */
1714         case SIG_EM:
1715         case SIG_EMWINK:
1716         case SIG_FEATD:
1717         case SIG_FEATDMF:
1718         case SIG_FEATB:
1719         case SIG_SF:
1720         case SIG_SFWINK:
1721         case SIG_SF_FEATD:
1722         case SIG_SF_FEATDMF:
1723         case SIG_SF_FEATB:
1724         case SIG_FXOLS:
1725         case SIG_FXOGS:
1726         case SIG_FXOKS:
1727                 /* Pick up the line */
1728                 ast_log(LOG_DEBUG, "Took %s off hook\n", ast->name);
1729                 res =  zt_set_hook(p->subs[SUB_REAL].zfd, ZT_OFFHOOK);
1730                 tone_zone_play_tone(p->subs[index].zfd, -1);
1731                 p->dialing = 0;
1732                 if ((index == SUB_REAL) && p->subs[SUB_THREEWAY].inthreeway) {
1733                         if (oldstate == AST_STATE_RINGING) {
1734                                 ast_log(LOG_DEBUG, "Finally swapping real and threeway\n");
1735                                 tone_zone_play_tone(p->subs[SUB_THREEWAY].zfd, -1);
1736                                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
1737                                 p->owner = p->subs[SUB_REAL].owner;
1738                         }
1739                 }
1740                 break;
1741 #ifdef ZAPATA_PRI
1742         case SIG_PRI:
1743                 /* Send a pri acknowledge */
1744                 if (!pri_grab(p, p->pri)) {
1745                         res = pri_answer(p->pri->pri, p->call, 0, 1);
1746                         pri_rel(p->pri);
1747                 } else {
1748                         ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
1749                         res= -1;
1750                 }
1751                 break;
1752 #endif
1753 #ifdef ZAPATA_R2
1754         case SIG_R2:
1755                 res = mfcr2_AnswerCall(p->r2, NULL);
1756                 if (res)
1757                         ast_log(LOG_WARNING, "R2 Answer call failed :( on %s\n", ast->name);
1758                 break;
1759 #endif                  
1760         case 0:
1761                 return 0;
1762         default:
1763                 ast_log(LOG_WARNING, "Don't know how to answer signalling %d (channel %d)\n", p->sig, p->channel);
1764                 res = -1;
1765         }
1766         ast_pthread_mutex_unlock(&p->lock);
1767         return res;
1768 }
1769
1770 static int zt_setoption(struct ast_channel *chan, int option, void *data, int datalen)
1771 {
1772 char    *cp;
1773 int     x;
1774
1775         struct zt_pvt *p = chan->pvt->pvt;
1776
1777         
1778         if ((option != AST_OPTION_TONE_VERIFY) && (option != AST_OPTION_AUDIO_MODE) &&
1779                 (option != AST_OPTION_TDD) && (option != AST_OPTION_RELAXDTMF))
1780            {
1781                 errno = ENOSYS;
1782                 return -1;
1783            }
1784         cp = (char *)data;
1785         if ((!cp) || (datalen < 1))
1786            {
1787                 errno = EINVAL;
1788                 return -1;
1789            }
1790         switch(option) {
1791             case AST_OPTION_TONE_VERIFY:
1792                 if (!p->dsp)
1793                         break;
1794                 switch(*cp) {
1795                     case 1:
1796                                 ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: MUTECONF(1) on %s\n",chan->name);
1797                                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_MUTECONF | p->dtmfrelax);  /* set mute mode if desired */
1798                         break;
1799                     case 2:
1800                                 ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: MUTECONF/MAX(2) on %s\n",chan->name);
1801                                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_MUTECONF | DSP_DIGITMODE_MUTEMAX | p->dtmfrelax);  /* set mute mode if desired */
1802                         break;
1803                     default:
1804                                 ast_log(LOG_DEBUG, "Set option TONE VERIFY, mode: OFF(0) on %s\n",chan->name);
1805                                 ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_DTMF | p->dtmfrelax);  /* set mute mode if desired */
1806                         break;
1807                 }
1808                 break;
1809             case AST_OPTION_TDD:  /* turn on or off TDD */
1810                 if (!*cp) { /* turn it off */
1811                         ast_log(LOG_DEBUG, "Set option TDD MODE, value: OFF(0) on %s\n",chan->name);
1812                         if (p->tdd) tdd_free(p->tdd);
1813                         p->tdd = 0;
1814                         p->mate = 0;
1815                         break;
1816                 }
1817                 if (*cp == 2)
1818                         ast_log(LOG_DEBUG, "Set option TDD MODE, value: MATE(2) on %s\n",chan->name);
1819                 else ast_log(LOG_DEBUG, "Set option TDD MODE, value: ON(1) on %s\n",chan->name);
1820                 p->mate = 0;
1821                 zt_disable_ec(p);
1822                 /* otherwise, turn it on */
1823                 if (!p->didtdd) { /* if havent done it yet */
1824                         unsigned char mybuf[41000],*buf;
1825                         int size,res,fd,len;
1826                         int index;
1827                         fd_set wfds,efds;
1828                         buf = mybuf;
1829                         memset(buf,0x7f,sizeof(mybuf)); /* set to silence */
1830                         ast_tdd_gen_ecdisa(buf + 16000,16000);  /* put in tone */
1831                         len = 40000;
1832                         index = zt_get_index(chan, p, 0);
1833                         if (index < 0) {
1834                                 ast_log(LOG_WARNING, "No index in TDD?\n");
1835                                 return -1;
1836                         }
1837                         fd = p->subs[index].zfd;
1838                         while(len) {
1839                                 if (ast_check_hangup(chan)) return -1;
1840                                 size = len;
1841                                 if (size > READ_SIZE)
1842                                         size = READ_SIZE;
1843                                 FD_ZERO(&wfds);
1844                                 FD_ZERO(&efds);
1845                                 FD_SET(fd,&wfds);
1846                                 FD_SET(fd,&efds);                       
1847                                 res = select(fd + 1,NULL,&wfds,&efds,NULL);
1848                                 if (!res) {
1849                                         ast_log(LOG_DEBUG, "select (for write) ret. 0 on channel %d\n", p->channel);
1850                                         continue;
1851                                 }
1852                                   /* if got exception */
1853                                 if (FD_ISSET(fd,&efds)) return -1;
1854                                 if (!FD_ISSET(fd,&wfds)) {
1855                                         ast_log(LOG_DEBUG, "write fd not ready on channel %d\n", p->channel);
1856                                         continue;
1857                                 }
1858                                 res = write(fd, buf, size);
1859                                 if (res != size) {
1860                                         if (res == -1) return -1;
1861                                         ast_log(LOG_DEBUG, "Write returned %d (%s) on channel %d\n", res, strerror(errno), p->channel);
1862                                         break;
1863                                 }
1864                                 len -= size;
1865                                 buf += size;
1866                         }
1867                         p->didtdd = 1; /* set to have done it now */            
1868                 }
1869                 if (*cp == 2) { /* Mate mode */
1870                         if (p->tdd) tdd_free(p->tdd);
1871                         p->tdd = 0;
1872                         p->mate = 1;
1873                         break;
1874                         }               
1875                 if (!p->tdd) { /* if we dont have one yet */
1876                         p->tdd = tdd_new(); /* allocate one */
1877                 }               
1878                 break;
1879             case AST_OPTION_RELAXDTMF:  /* Relax DTMF decoding (or not) */
1880                 if (!*cp)
1881                 {               
1882                         ast_log(LOG_DEBUG, "Set option RELAX DTMF, value: OFF(0) on %s\n",chan->name);
1883                         x = 0;
1884                 }
1885                 else
1886                 {               
1887                         ast_log(LOG_DEBUG, "Set option RELAX DTMF, value: ON(1) on %s\n",chan->name);
1888                         x = 1;
1889                 }
1890                 ast_dsp_digitmode(p->dsp,x ? DSP_DIGITMODE_RELAXDTMF : DSP_DIGITMODE_DTMF | p->dtmfrelax);
1891                 break;
1892             case AST_OPTION_AUDIO_MODE:  /* Set AUDIO mode (or not) */
1893                 if (!*cp)
1894                 {               
1895                         ast_log(LOG_DEBUG, "Set option AUDIO MODE, value: OFF(0) on %s\n",chan->name);
1896                         x = 0;
1897                         zt_disable_ec(p);
1898                 }
1899                 else
1900                 {               
1901                         ast_log(LOG_DEBUG, "Set option AUDIO MODE, value: ON(1) on %s\n",chan->name);
1902                         x = 1;
1903                 }
1904                 if (ioctl(p->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &x) == -1)
1905                         ast_log(LOG_WARNING, "Unable to set audio mode on channel %d to %d\n", p->channel, x);
1906                 break;
1907         }
1908         errno = 0;
1909         return 0;
1910 }
1911
1912 static void zt_unlink(struct zt_pvt *slave, struct zt_pvt *master)
1913 {
1914         /* Unlink a specific slave or all slaves/masters from a given master */
1915         int x;
1916         int hasslaves;
1917         if (!master)
1918                 return;
1919         hasslaves = 0;
1920         for (x=0;x<MAX_SLAVES;x++) {
1921                 if (master->slaves[x]) {
1922                         if (!slave || (master->slaves[x] == slave)) {
1923                                 /* Take slave out of the conference */
1924                                 ast_log(LOG_DEBUG, "Unlinking slave %d from %d\n", master->slaves[x]->channel, master->channel);
1925                                 conf_del(&master->confno, &master->slaves[x]->subs[SUB_REAL], SUB_REAL);
1926                                 master->slaves[x]->master = NULL;
1927                                 master->slaves[x] = NULL;
1928                         } else
1929                                 hasslaves = 1;
1930                 }
1931                 if (!hasslaves)
1932                         master->inconference = 0;
1933         }
1934         if (!slave) {
1935                 if (master->master) {
1936                         /* Take master out of the conference */
1937                         conf_del(&master->master->confno, &master->subs[SUB_REAL], SUB_REAL);
1938                         hasslaves = 0;
1939                         for (x=0;x<MAX_SLAVES;x++) {
1940                                 if (master->master->slaves[x] == master)
1941                                         master->master->slaves[x] = NULL;
1942                                 else if (master->master->slaves[x])
1943                                         hasslaves = 1;
1944                         }
1945                         if (!hasslaves)
1946                                 master->master->inconference = 0;
1947                 }
1948                 master->master = NULL;
1949         }
1950         update_conf(master);
1951 }
1952
1953 static void zt_link(struct zt_pvt *slave, struct zt_pvt *master) {
1954         int x;
1955         if (!slave || !master) {
1956                 ast_log(LOG_WARNING, "Tried to link to/from NULL??\n");
1957                 return;
1958         }
1959         for (x=0;x<MAX_SLAVES;x++) {
1960                 if (!master->slaves[x]) {
1961                         master->slaves[x] = slave;
1962                         break;
1963                 }
1964         }
1965         if (x >= MAX_SLAVES) {
1966                 ast_log(LOG_WARNING, "Replacing slave %d with new slave, %d\n", master->slaves[MAX_SLAVES - 1]->channel, slave->channel);
1967                 master->slaves[MAX_SLAVES - 1] = slave;
1968         }
1969         if (slave->master) 
1970                 ast_log(LOG_WARNING, "Replacing master %d with new master, %d\n", slave->master->channel, master->channel);
1971         slave->master = master;
1972         
1973         ast_log(LOG_DEBUG, "Making %d slave to master %d at %d\n", slave->channel, master->channel, x);
1974 }
1975
1976 static int zt_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc)
1977 {
1978         struct ast_channel *who = NULL, *cs[3];
1979         struct zt_pvt *p0, *p1, *op0, *op1;
1980         struct zt_pvt *master=NULL, *slave=NULL;
1981         struct ast_frame *f;
1982         int to;
1983         int inconf = 0;
1984         int nothingok = 0;
1985         int ofd1, ofd2;
1986         int oi1, oi2, i1 = -1, i2 = -1, t1, t2;
1987         int os1 = -1, os2 = -1;
1988         struct ast_channel *oc1, *oc2;
1989
1990         /* if need DTMF, cant native bridge */
1991         if (flags & (AST_BRIDGE_DTMF_CHANNEL_0 | AST_BRIDGE_DTMF_CHANNEL_1))
1992                 return -2;
1993         p0 = c0->pvt->pvt;
1994         p1 = c1->pvt->pvt;
1995         /* cant do pseudo-channels here */
1996         if ((!p0->sig) || (!p1->sig)) return -2;
1997
1998         ast_pthread_mutex_lock(&c0->lock);
1999         ast_pthread_mutex_lock(&c1->lock);
2000         op0 = p0 = c0->pvt->pvt;
2001         op1 = p1 = c1->pvt->pvt;
2002         ofd1 = c0->fds[0];
2003         ofd2 = c1->fds[0];
2004         oi1 = zt_get_index(c0, p0, 0);
2005         oi2 = zt_get_index(c1, p1, 0);
2006         oc1 = p0->owner;
2007         oc2 = p1->owner;
2008         if ((oi1 < 0) || (oi2 < 0))
2009                 return -1;
2010
2011
2012
2013         ast_pthread_mutex_lock(&p0->lock);
2014         if (pthread_mutex_trylock(&p1->lock)) {
2015                 /* Don't block, due to potential for deadlock */
2016                 ast_pthread_mutex_unlock(&p0->lock);
2017                 ast_pthread_mutex_unlock(&c0->lock);
2018                 ast_pthread_mutex_unlock(&c1->lock);
2019                 ast_log(LOG_NOTICE, "Avoiding deadlock...\n");
2020                 return -3;
2021         }
2022         if ((oi1 == SUB_REAL) && (oi2 == SUB_REAL)) {
2023                 if (!p0->owner || !p1->owner) {
2024                         /* Currently unowned -- Do nothing.  */
2025                         nothingok = 1;
2026                 } else {
2027                         /* If we don't have a call-wait in a 3-way, and we aren't in a 3-way, we can be master */
2028                         if (!p0->subs[SUB_CALLWAIT].inthreeway && !p1->subs[SUB_REAL].inthreeway) {
2029                                 master = p0;
2030                                 slave = p1;
2031                                 inconf = 1;
2032                         } else if (!p1->subs[SUB_CALLWAIT].inthreeway && !p0->subs[SUB_REAL].inthreeway) {
2033                                 master = p1;
2034                                 slave = p0;
2035                                 inconf = 1;
2036                         } else {
2037                                 ast_log(LOG_WARNING, "Huh?  Both calls are callwaits or 3-ways?  That's clever...?\n");
2038                                 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,
2039                                                 p0->channel, oi1, (p1->subs[SUB_CALLWAIT].zfd > -1) ? 1 : 0, p1->subs[SUB_REAL].inthreeway);
2040                         }
2041                 }
2042         } else if ((oi1 == SUB_REAL) && (oi2 == SUB_THREEWAY)) {
2043                 if (p1->subs[SUB_THREEWAY].inthreeway) {
2044                         master = p1;
2045                         slave = p0;
2046                 } else {
2047                         nothingok = 1;
2048                 }
2049         } else if ((oi1 == SUB_THREEWAY) && (oi2 == SUB_REAL)) {
2050                 if (p0->subs[SUB_THREEWAY].inthreeway) {
2051                         master = p0;
2052                         slave = p1;
2053                 } else {
2054                         nothingok  = 1;
2055                 }
2056         } else if ((oi1 == SUB_REAL) && (oi2 == SUB_CALLWAIT)) {
2057                 /* We have a real and a call wait.  If we're in a three way call, put us in it, otherwise, 
2058                    don't put us in anything */
2059                 if (p1->subs[SUB_CALLWAIT].inthreeway) {
2060                         master = p1;
2061                         slave = p0;
2062                 } else {
2063                         nothingok = 1;
2064                 }
2065         } else if ((oi1 == SUB_CALLWAIT) && (oi2 == SUB_REAL)) {
2066                 /* Same as previous */
2067                 if (p0->subs[SUB_CALLWAIT].inthreeway) {
2068                         master = p0;
2069                         slave = p1;
2070                 } else {
2071                         nothingok = 1;
2072                 }
2073         }
2074         ast_log(LOG_DEBUG, "master: %d, slave: %d, nothingok: %d\n",
2075                 master ? master->channel : 0, slave ? slave->channel : 0, nothingok);
2076         if (master && slave) {
2077                 /* Stop any tones, or play ringtone as appropriate.  If they're bridged
2078                    in an active threeway call with a channel that is ringing, we should
2079                    indicate ringing. */
2080                 if ((oi2 == SUB_THREEWAY) && 
2081                         p1->subs[SUB_THREEWAY].inthreeway && 
2082                         p1->subs[SUB_REAL].owner && 
2083                         p1->subs[SUB_REAL].inthreeway && 
2084                         (p1->subs[SUB_REAL].owner->_state == AST_STATE_RINGING)) {
2085                                 ast_log(LOG_DEBUG, "Playing ringback on %s since %s is in a ringing three-way\n", c0->name, c1->name);
2086                                 tone_zone_play_tone(p0->subs[oi1].zfd, ZT_TONE_RINGTONE);
2087                                 os2 = p1->subs[SUB_REAL].owner->_state;
2088                 } else {
2089                                 ast_log(LOG_DEBUG, "Stoping tones on %d/%d talking to %d/%d\n", p0->channel, oi1, p1->channel, oi2);
2090                                 tone_zone_play_tone(p0->subs[oi1].zfd, -1);
2091                 }
2092                 if ((oi1 == SUB_THREEWAY) && 
2093                         p0->subs[SUB_THREEWAY].inthreeway && 
2094                         p0->subs[SUB_REAL].owner && 
2095                         p0->subs[SUB_REAL].inthreeway && 
2096                         (p0->subs[SUB_REAL].owner->_state == AST_STATE_RINGING)) {
2097                                 ast_log(LOG_DEBUG, "Playing ringback on %s since %s is in a ringing three-way\n", c1->name, c0->name);
2098                                 tone_zone_play_tone(p1->subs[oi2].zfd, ZT_TONE_RINGTONE);
2099                                 os1 = p0->subs[SUB_REAL].owner->_state;
2100                 } else {
2101                                 ast_log(LOG_DEBUG, "Stoping tones on %d/%d talking to %d/%d\n", p1->channel, oi2, p0->channel, oi1);
2102                                 tone_zone_play_tone(p1->subs[oi1].zfd, -1);
2103                 }
2104                 if ((oi1 == SUB_REAL) && (oi2 == SUB_REAL)) {
2105                         if (!p0->echocanbridged || !p1->echocanbridged) {
2106                                 /* Disable echo cancellation if appropriate */
2107                                 zt_disable_ec(p0);
2108                                 zt_disable_ec(p1);
2109                         }
2110                 }
2111                 zt_link(slave, master);
2112                 master->inconference = inconf;
2113         } else if (!nothingok)
2114                 ast_log(LOG_WARNING, "Can't link %d/%s with %d/%s\n", p0->channel, subnames[oi1], p1->channel, subnames[oi2]);
2115
2116         update_conf(p0);
2117         update_conf(p1);
2118         t1 = p0->subs[SUB_REAL].inthreeway;
2119         t2 = p1->subs[SUB_REAL].inthreeway;
2120
2121         ast_pthread_mutex_unlock(&p0->lock);
2122         ast_pthread_mutex_unlock(&p1->lock);
2123
2124         ast_pthread_mutex_unlock(&c0->lock);
2125         ast_pthread_mutex_unlock(&c1->lock);
2126
2127         /* Native bridge failed */
2128         if ((!master || !slave) && !nothingok) {
2129                 if (op0 == p0)
2130                         zt_enable_ec(p0);
2131                 if (op1 == p1)
2132                         zt_enable_ec(p1);
2133                 return -1;
2134         }
2135         
2136         cs[0] = c0;
2137         cs[1] = c1;
2138         cs[2] = NULL;
2139         for (;;) {
2140                 /* Here's our main loop...  Start by locking things, looking for private parts, 
2141                    and then balking if anything is wrong */
2142                 ast_pthread_mutex_lock(&c0->lock);
2143                 ast_pthread_mutex_lock(&c1->lock);
2144                 p0 = c0->pvt->pvt;
2145                 p1 = c1->pvt->pvt;
2146                 if (op0 == p0)
2147                         i1 = zt_get_index(c0, p0, 1);
2148                 if (op1 == p1)
2149                         i2 = zt_get_index(c1, p1, 1);
2150                 ast_pthread_mutex_unlock(&c0->lock);
2151                 ast_pthread_mutex_unlock(&c1->lock);
2152                 if ((op0 != p0) || (op1 != p1) || 
2153                     (ofd1 != c0->fds[0]) || 
2154                         (ofd2 != c1->fds[0]) ||
2155                     (p0->subs[SUB_REAL].owner && (os1 > -1) && (os1 != p0->subs[SUB_REAL].owner->_state)) || 
2156                     (p1->subs[SUB_REAL].owner && (os2 > -1) && (os2 != p1->subs[SUB_REAL].owner->_state)) || 
2157                     (oc1 != p0->owner) || 
2158                         (oc2 != p1->owner) ||
2159                         (t1 != p0->subs[SUB_REAL].inthreeway) ||
2160                         (t2 != p1->subs[SUB_REAL].inthreeway) ||
2161                         (oi1 != i1) ||
2162                         (oi2 != i2)) {
2163                         if (slave && master)
2164                                 zt_unlink(slave, master);
2165                         ast_log(LOG_DEBUG, "Something changed out on %d/%d to %d/%d, returning -3 to restart\n",
2166                                                                         op0->channel, oi1, op1->channel, oi2);
2167                         if (op0 == p0)
2168                                 zt_enable_ec(p0);
2169                         if (op1 == p1)
2170                                 zt_enable_ec(p1);
2171                         return -3;
2172                 }
2173                 to = -1;
2174                 who = ast_waitfor_n(cs, 2, &to);
2175                 if (!who) {
2176                         ast_log(LOG_DEBUG, "Ooh, empty read...\n");
2177                         continue;
2178                 }
2179                 if (who->pvt->pvt == op0) 
2180                         op0->ignoredtmf = 1;
2181                 else if (who->pvt->pvt == op1)
2182                         op1->ignoredtmf = 1;
2183                 f = ast_read(who);
2184                 if (who->pvt->pvt == op0) 
2185                         op0->ignoredtmf = 0;
2186                 else if (who->pvt->pvt == op1)
2187                         op1->ignoredtmf = 0;
2188                 if (!f) {
2189                         *fo = NULL;
2190                         *rc = who;
2191                         if (slave && master)
2192                                 zt_unlink(slave, master);
2193                         if (op0 == p0)
2194                                 zt_enable_ec(p0);
2195                         if (op1 == p1)
2196                                 zt_enable_ec(p1);
2197                         return 0;
2198                 }
2199                 if (f->frametype == AST_FRAME_DTMF) {
2200                         if (((who == c0) && (flags & AST_BRIDGE_DTMF_CHANNEL_0)) || 
2201                             ((who == c1) && (flags & AST_BRIDGE_DTMF_CHANNEL_1))) {
2202                                 *fo = f;
2203                                 *rc = who;
2204                                 if (slave && master)
2205                                         zt_unlink(slave, master);
2206                                 return 0;
2207                         } else if ((who == c0) && p0->pulsedial) {
2208                                 ast_write(c1, f);
2209                         } else if ((who == c1) && p1->pulsedial) {
2210                                 ast_write(c0, f);
2211                         }
2212                 }
2213                 ast_frfree(f);
2214
2215                 /* Swap who gets priority */
2216                 cs[2] = cs[0];
2217                 cs[0] = cs[1];
2218                 cs[1] = cs[2];
2219         }
2220 }
2221
2222 static int zt_indicate(struct ast_channel *chan, int condition);
2223
2224 static int zt_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
2225 {
2226         struct zt_pvt *p = newchan->pvt->pvt;
2227         int x;
2228         ast_log(LOG_DEBUG, "New owner for channel %d is %s\n", p->channel, newchan->name);
2229         if (p->owner == oldchan)
2230                 p->owner = newchan;
2231         for (x=0;x<3;x++)
2232                 if (p->subs[x].owner == oldchan) {
2233                         if (!x)
2234                                 zt_unlink(NULL, p);
2235                         p->subs[x].owner = newchan;
2236                 }
2237         if (newchan->_state == AST_STATE_RINGING) 
2238                 zt_indicate(newchan, AST_CONTROL_RINGING);
2239         update_conf(p);
2240         return 0;
2241 }
2242
2243 static int zt_ring_phone(struct zt_pvt *p)
2244 {
2245         int x;
2246         int res;
2247         /* Make sure our transmit state is on hook */
2248         x = 0;
2249         x = ZT_ONHOOK;
2250         res = ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
2251         do {
2252                 x = ZT_RING;
2253                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_HOOK, &x);
2254 #if 0
2255                 printf("Res: %d, error: %s\n", res, strerror(errno));
2256 #endif                                          
2257                 if (res) {
2258                         switch(errno) {
2259                         case EBUSY:
2260                         case EINTR:
2261                                 /* Wait just in case */
2262                                 usleep(10000);
2263                                 continue;
2264                         case EINPROGRESS:
2265                                 res = 0;
2266                                 break;
2267                         default:
2268                                 ast_log(LOG_WARNING, "Couldn't ring the phone: %s\n", strerror(errno));
2269                                 res = 0;
2270                         }
2271                 }
2272         } while (res);
2273         return res;
2274 }
2275
2276 static void *ss_thread(void *data);
2277
2278 static struct ast_channel *zt_new(struct zt_pvt *, int, int, int, int);
2279
2280 static int attempt_transfer(struct zt_pvt *p)
2281 {
2282         /* In order to transfer, we need at least one of the channels to
2283            actually be in a call bridge.  We can't conference two applications
2284            together (but then, why would we want to?) */
2285         if (p->subs[SUB_REAL].owner->bridge) {
2286                 /* The three-way person we're about to transfer to could still be in MOH, so
2287                    stop if now if appropriate */
2288                 if (p->subs[SUB_THREEWAY].owner->bridge)
2289                         ast_moh_stop(p->subs[SUB_THREEWAY].owner->bridge);
2290                 if (p->subs[SUB_THREEWAY].owner->_state == AST_STATE_RINGING) {
2291                         ast_indicate(p->subs[SUB_REAL].owner->bridge, AST_CONTROL_RINGING);
2292                 }
2293                 if (ast_channel_masquerade(p->subs[SUB_THREEWAY].owner, p->subs[SUB_REAL].owner->bridge)) {
2294                         ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
2295                                         p->subs[SUB_REAL].owner->bridge->name, p->subs[SUB_THREEWAY].owner->name);
2296                         return -1;
2297                 }
2298                 /* Orphan the channel */
2299                 unalloc_sub(p, SUB_THREEWAY);
2300         } else if (p->subs[SUB_THREEWAY].owner->bridge) {
2301                 if (p->subs[SUB_REAL].owner->_state == AST_STATE_RINGING) {
2302                         ast_indicate(p->subs[SUB_THREEWAY].owner->bridge, AST_CONTROL_RINGING);
2303                 }
2304                 ast_moh_stop(p->subs[SUB_THREEWAY].owner->bridge);
2305                 if (ast_channel_masquerade(p->subs[SUB_REAL].owner, p->subs[SUB_THREEWAY].owner->bridge)) {
2306                         ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
2307                                         p->subs[SUB_THREEWAY].owner->bridge->name, p->subs[SUB_REAL].owner->name);
2308                         return -1;
2309                 }
2310                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
2311                 unalloc_sub(p, SUB_THREEWAY);
2312                 /* Tell the caller not to hangup */
2313                 return 1;
2314         } else {
2315                 ast_log(LOG_DEBUG, "Neither %s nor %s are in a bridge, nothing to transfer\n",
2316                                         p->subs[SUB_REAL].owner->name, p->subs[SUB_THREEWAY].owner->name);
2317                 p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2318         }
2319         return 0;
2320 }
2321
2322 #ifdef ZAPATA_R2
2323 static struct ast_frame *handle_r2_event(struct zt_pvt *p, mfcr2_event_t *e, int index)
2324 {
2325         struct ast_frame *f;
2326         f = &p->subs[index].f;
2327         if (!p->r2) {
2328                 ast_log(LOG_WARNING, "Huh?  No R2 structure :(\n");
2329                 return NULL;
2330         }
2331         switch(e->e) {
2332         case MFCR2_EVENT_BLOCKED:
2333                 if (option_verbose > 2)
2334                         ast_verbose(VERBOSE_PREFIX_3 "Channel %d blocked\n", p->channel);
2335                 break;
2336         case MFCR2_EVENT_UNBLOCKED:
2337                 if (option_verbose > 2)
2338                         ast_verbose(VERBOSE_PREFIX_3 "Channel %d unblocked\n", p->channel);
2339                 break;
2340         case MFCR2_EVENT_CONFIG_ERR:
2341                 if (option_verbose > 2)
2342                         ast_verbose(VERBOSE_PREFIX_3 "Config error on channel %d\n", p->channel);
2343                 break;
2344         case MFCR2_EVENT_RING:
2345                 if (option_verbose > 2)
2346                         ast_verbose(VERBOSE_PREFIX_3 "Ring on channel %d\n", p->channel);
2347                 break;
2348         case MFCR2_EVENT_HANGUP:
2349                 if (option_verbose > 2)
2350                         ast_verbose(VERBOSE_PREFIX_3 "Hangup on channel %d\n", p->channel);
2351                 break;
2352         case MFCR2_EVENT_RINGING:
2353                 if (option_verbose > 2)
2354                         ast_verbose(VERBOSE_PREFIX_3 "Ringing on channel %d\n", p->channel);
2355                 break;
2356         case MFCR2_EVENT_ANSWER:
2357                 if (option_verbose > 2)
2358                         ast_verbose(VERBOSE_PREFIX_3 "Answer on channel %d\n", p->channel);
2359                 break;
2360         case MFCR2_EVENT_HANGUP_ACK:
2361                 if (option_verbose > 2)
2362                         ast_verbose(VERBOSE_PREFIX_3 "Hangup ACK on channel %d\n", p->channel);
2363                 break;
2364         case MFCR2_EVENT_IDLE:
2365                 if (option_verbose > 2)
2366                         ast_verbose(VERBOSE_PREFIX_3 "Idle on channel %d\n", p->channel);
2367                 break;
2368         default:
2369                 ast_log(LOG_WARNING, "Unknown MFC/R2 event %d\n", e->e);
2370                 break;
2371         }
2372         return f;
2373 }
2374
2375 static mfcr2_event_t *r2_get_event_bits(struct zt_pvt *p)
2376 {
2377         int x;
2378         int res;
2379         mfcr2_event_t *e;
2380         res = ioctl(p->subs[SUB_REAL].zfd, ZT_GETRXBITS, &x);
2381         if (res) {
2382                 ast_log(LOG_WARNING, "Unable to check received bits\n");
2383                 return NULL;
2384         }
2385         if (!p->r2) {
2386                 ast_log(LOG_WARNING, "Odd, no R2 structure on channel %d\n", p->channel);
2387                 return NULL;
2388         }
2389         e = mfcr2_cas_signaling_event(p->r2, x);
2390         return e;
2391 }
2392 #endif
2393
2394 static int check_for_conference(struct zt_pvt *p)
2395 {
2396         ZT_CONFINFO ci;
2397         /* Fine if we already have a master, etc */
2398         if (p->master || (p->confno > -1))
2399                 return 0;
2400         memset(&ci, 0, sizeof(ci));
2401         if (ioctl(p->subs[SUB_REAL].zfd, ZT_GETCONF, &ci)) {
2402                 ast_log(LOG_WARNING, "Failed to get conference info on channel %d\n", p->channel);
2403                 return 0;
2404         }
2405         /* If we have no master and don't have a confno, then 
2406            if we're in a conference, it's probably a MeetMe room or
2407            some such, so don't let us 3-way out! */
2408         if (ci.confno) {
2409                 if (option_verbose > 2) 
2410                         ast_verbose(VERBOSE_PREFIX_3 "Avoiding 3-way call when in an external conference\n");
2411                 return 1;
2412         }
2413         return 0;
2414 }
2415
2416 static int get_alarms(struct zt_pvt *p)
2417 {
2418         int res;
2419         ZT_SPANINFO zi;
2420         memset(&zi, 0, sizeof(zi));
2421         zi.spanno = p->span;
2422         res = ioctl(p->subs[SUB_REAL].zfd, ZT_SPANSTAT, &zi);
2423         if (res < 0) {
2424                 ast_log(LOG_WARNING, "Unable to determine alarm on channel %d\n", p->channel);
2425                 return 0;
2426         }
2427         return zi.alarms;
2428 }
2429                         
2430 static struct ast_frame *zt_handle_event(struct ast_channel *ast)
2431 {
2432         int res,x;
2433         int index;
2434         struct zt_pvt *p = ast->pvt->pvt;
2435         pthread_t threadid;
2436         pthread_attr_t attr;
2437         struct ast_channel *chan;
2438         pthread_attr_init(&attr);
2439         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
2440         index = zt_get_index(ast, p, 0);
2441         p->subs[index].f.frametype = AST_FRAME_NULL;
2442         p->subs[index].f.datalen = 0;
2443         p->subs[index].f.samples = 0;
2444         p->subs[index].f.mallocd = 0;
2445         p->subs[index].f.offset = 0;
2446         p->subs[index].f.src = "zt_handle_event";
2447         p->subs[index].f.data = NULL;
2448         if (index < 0)
2449                 return &p->subs[index].f;
2450         res = zt_get_event(p->subs[index].zfd);
2451         ast_log(LOG_DEBUG, "Got event %s(%d) on channel %d (index %d)\n", event2str(res), res, p->channel, index);
2452         if (res & (ZT_EVENT_PULSEDIGIT | ZT_EVENT_DTMFDIGIT)) {
2453                 if (res & ZT_EVENT_PULSEDIGIT)
2454                         p->pulsedial = 1;
2455                 else
2456                         p->pulsedial = 0;
2457                 ast_log(LOG_DEBUG, "Pulse dial '%c'\n", res & 0xff);
2458                 p->subs[index].f.frametype = AST_FRAME_DTMF;
2459                 p->subs[index].f.subclass = res & 0xff;
2460                 /* Return the captured digit */
2461                 return &p->subs[index].f;
2462         }
2463         switch(res) {
2464                 case ZT_EVENT_BITSCHANGED:
2465                         if (p->sig == SIG_R2) {
2466 #ifdef ZAPATA_R2
2467                                 struct ast_frame  *f = &p->subs[index].f;
2468                                 mfcr2_event_t *e;
2469                                 e = r2_get_event_bits(p);
2470                                 if (e)
2471                                         f = handle_r2_event(p, e, index);
2472                                 return f;
2473 #else                           
2474                                 break;
2475 #endif
2476                         }
2477                         ast_log(LOG_WARNING, "Recieved bits changed on %s signalling?\n", sig2str(p->sig));
2478                 case ZT_EVENT_PULSE_START:
2479                         /* Stop tone if there's a pulse start and the PBX isn't started */
2480                         if (!ast->pbx)
2481                                 tone_zone_play_tone(p->subs[index].zfd, -1);
2482                         break;  
2483                 case ZT_EVENT_DIALCOMPLETE:
2484                         if (p->inalarm) break;
2485                         if (p->radio) break;
2486                         if (ioctl(p->subs[index].zfd,ZT_DIALING,&x) == -1) {
2487                                 ast_log(LOG_DEBUG, "ZT_DIALING ioctl failed on %s\n",ast->name);
2488                                 return NULL;
2489                         }
2490                         if (!x) { /* if not still dialing in driver */
2491                                 zt_enable_ec(p);
2492                                 p->dialing = 0;
2493                                 if (ast->_state == AST_STATE_DIALING) {
2494                                         if (p->callprogress && CANPROGRESSDETECT(p) && p->dsp) {
2495                                                 ast_log(LOG_DEBUG, "Done dialing, but waiting for progress detection before doing more...\n");
2496                                         } 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)))) {
2497                                                 ast_setstate(ast, AST_STATE_RINGING);
2498                                         } else {
2499                                                 ast_setstate(ast, AST_STATE_UP);
2500                                                 p->subs[index].f.frametype = AST_FRAME_CONTROL;
2501                                                 p->subs[index].f.subclass = AST_CONTROL_ANSWER;
2502                                         }
2503                                 }
2504                         }
2505                         break;
2506                 case ZT_EVENT_ALARM:
2507                         p->inalarm = 1;
2508                         res = get_alarms(p);
2509                         ast_log(LOG_WARNING, "Detected alarm on channel %d: %s\n", p->channel, alarm2str(res));
2510                         /* fall through intentionally */
2511                 case ZT_EVENT_ONHOOK:
2512                         if (p->radio)
2513                         {
2514                                 p->subs[index].f.frametype = AST_FRAME_CONTROL;
2515                                 p->subs[index].f.subclass = AST_CONTROL_RADIO_UNKEY;
2516                                 break;
2517                         }
2518                         switch(p->sig) {
2519                         case SIG_FXOLS:
2520                         case SIG_FXOGS:
2521                         case SIG_FXOKS:
2522                                 p->onhooktime = time(NULL);
2523                                 p->msgstate = -1;
2524                                 /* Check for some special conditions regarding call waiting */
2525                                 if (index == SUB_REAL) {
2526                                         /* The normal line was hung up */
2527                                         if (p->subs[SUB_CALLWAIT].owner) {
2528                                                 /* There's a call waiting call, so ring the phone, but make it unowned in the mean time */
2529                                                 swap_subs(p, SUB_CALLWAIT, SUB_REAL);
2530                                                 if (option_verbose > 2) 
2531                                                         ast_verbose(VERBOSE_PREFIX_3 "Channel %d still has (callwait) call, ringing phone\n", p->channel);
2532                                                 unalloc_sub(p, SUB_CALLWAIT);   
2533 #if 0
2534                                                 p->subs[index].needanswer = 0;
2535                                                 p->subs[index].needringing = 0;
2536 #endif                                          
2537                                                 p->callwaitingrepeat = 0;
2538                                                 p->cidcwexpire = 0;
2539                                                 p->owner = NULL;
2540                                                 zt_ring_phone(p);
2541                                         } else if (p->subs[SUB_THREEWAY].owner) {
2542                                                 struct timeval tv;
2543                                                 unsigned int mssinceflash;
2544                                                 gettimeofday(&tv, NULL);
2545                                                 mssinceflash = (tv.tv_sec - p->flashtime.tv_sec) * 1000 + (tv.tv_usec - p->flashtime.tv_usec) / 1000;
2546                                                 ast_log(LOG_DEBUG, "Last flash was %d ms ago\n", mssinceflash);
2547                                                 if (mssinceflash < MIN_MS_SINCE_FLASH) {
2548                                                         /* It hasn't been long enough since the last flashook.  This is probably a bounce on 
2549                                                            hanging up.  Hangup both channels now */
2550                                                         if (p->subs[SUB_THREEWAY].owner)
2551                                                                 ast_queue_hangup(p->subs[SUB_THREEWAY].owner, 0);
2552                                                         p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2553                                                         ast_log(LOG_DEBUG, "Looks like a bounced flash, hanging up both calls on %d\n", p->channel);
2554                                                 } else if ((ast->pbx) ||
2555                                                         (ast->_state == AST_STATE_UP)) {
2556                                                         if (p->transfer) {
2557                                                                 /* In any case this isn't a threeway call anymore */
2558                                                                 p->subs[SUB_REAL].inthreeway = 0;
2559                                                                 p->subs[SUB_THREEWAY].inthreeway = 0;
2560                                                                 if ((res = attempt_transfer(p)) < 0)
2561                                                                         p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2562                                                                 else if (res) {
2563                                                                         /* Don't actually hang up at this point */
2564                                                                         break;
2565                                                                 }
2566                                                         } else
2567                                                                 p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2568                                                 } else {
2569                                                         /* Swap subs and dis-own channel */
2570                                                         swap_subs(p, SUB_THREEWAY, SUB_REAL);
2571                                                         p->owner = NULL;
2572                                                         /* Ring the phone */
2573                                                         zt_ring_phone(p);
2574                                                 }
2575                                         }
2576                                 } else {
2577                                         ast_log(LOG_WARNING, "Got a hangup and my index is %d?\n", index);
2578                                 }
2579                                 /* Fall through */
2580                         default:
2581                                 zt_disable_ec(p);
2582                                 return NULL;
2583                         }
2584                         break;
2585                 case ZT_EVENT_RINGOFFHOOK:
2586                         if (p->inalarm) break;
2587                         if (p->radio)
2588                         {
2589                                 p->subs[index].f.frametype = AST_FRAME_CONTROL;
2590                                 p->subs[index].f.subclass = AST_CONTROL_RADIO_KEY;
2591                                 break;
2592                         }
2593                         switch(p->sig) {
2594                         case SIG_FXOLS:
2595                         case SIG_FXOGS:
2596                         case SIG_FXOKS:
2597                                 switch(ast->_state) {
2598                                 case AST_STATE_RINGING:
2599                                         zt_enable_ec(p);
2600                                         p->subs[index].f.frametype = AST_FRAME_CONTROL;
2601                                         p->subs[index].f.subclass = AST_CONTROL_ANSWER;
2602                                         /* Make sure it stops ringing */
2603                                         zt_set_hook(p->subs[index].zfd, ZT_OFFHOOK);
2604                                         ast_log(LOG_DEBUG, "channel %d answered\n", p->channel);
2605                                         if (p->cidspill) {
2606                                                 /* Cancel any running CallerID spill */
2607                                                 free(p->cidspill);
2608                                                 p->cidspill = NULL;
2609                                         }
2610                                         p->dialing = 0;
2611                                         p->callwaitcas = 0;
2612                                         if (p->confirmanswer) {
2613                                                 /* Ignore answer if "confirm answer" is selected */
2614                                                 p->subs[index].f.frametype = AST_FRAME_NULL;
2615                                                 p->subs[index].f.subclass = 0;
2616                                         } else if (strlen(p->dop.dialstr)) {
2617                                                 /* nick@dccinc.com 4/3/03 - fxo should be able to do deferred dialing */
2618                                                 res = ioctl(p->subs[SUB_REAL].zfd, ZT_DIAL, &p->dop);
2619                                                 if (res < 0) {
2620                                                   ast_log(LOG_WARNING, "Unable to initiate dialing on trunk channel %d\n", p->channel);
2621                                                   p->dop.dialstr[0] = '\0';
2622                                                   return NULL;
2623                                                 } else {
2624                                                   ast_log(LOG_DEBUG, "Sent FXO deferred digit string: %s\n", p->dop.dialstr);
2625                                                   p->subs[index].f.frametype = AST_FRAME_NULL;
2626                                                   p->subs[index].f.subclass = 0;
2627                                                   p->dialing = 1;
2628                                                 }
2629                                                 p->dop.dialstr[0] = '\0';
2630                                            ast_setstate(ast, AST_STATE_DIALING);
2631                                         } else
2632                                            ast_setstate(ast, AST_STATE_UP);
2633                                         return &p->subs[index].f;
2634                                 case AST_STATE_DOWN:
2635                                         ast_setstate(ast, AST_STATE_RING);
2636                                         ast->rings = 1;
2637                                         p->subs[index].f.frametype = AST_FRAME_CONTROL;
2638                                         p->subs[index].f.subclass = AST_CONTROL_OFFHOOK;
2639                                         ast_log(LOG_DEBUG, "channel %d picked up\n", p->channel);
2640                                         return &p->subs[index].f;
2641                                 case AST_STATE_UP:
2642                                         /* Make sure it stops ringing */
2643                                         zt_set_hook(p->subs[index].zfd, ZT_OFFHOOK);
2644                                         /* Okay -- probably call waiting*/
2645                                         if (p->owner->bridge)
2646                                                         ast_moh_stop(p->owner->bridge);
2647                                         break;
2648                                 default:
2649                                         ast_log(LOG_WARNING, "FXO phone off hook in weird state %d??\n", ast->_state);
2650                                 }
2651                                 break;
2652                         case SIG_FXSLS:
2653                         case SIG_FXSGS:
2654                         case SIG_FXSKS:
2655                                 if (ast->_state == AST_STATE_RING) {
2656                                         p->ringt = RINGT;
2657                                 }
2658                                 /* Fall through */
2659                         case SIG_EM:
2660                         case SIG_EMWINK:
2661                         case SIG_FEATD:
2662                         case SIG_FEATDMF:
2663                         case SIG_FEATB:
2664                         case SIG_SF:
2665                         case SIG_SFWINK:
2666                         case SIG_SF_FEATD:
2667                         case SIG_SF_FEATDMF:
2668                         case SIG_SF_FEATB:
2669                                 if (ast->_state == AST_STATE_DOWN) {
2670                                         if (option_debug)
2671                                                 ast_log(LOG_DEBUG, "Ring detected\n");
2672                                         p->subs[index].f.frametype = AST_FRAME_CONTROL;
2673                                         p->subs[index].f.subclass = AST_CONTROL_RING;
2674                                 } else if (p->outgoing && ((ast->_state == AST_STATE_RINGING) || (ast->_state == AST_STATE_DIALING))) {
2675                                         if (option_debug)
2676                                                 ast_log(LOG_DEBUG, "Line answered\n");
2677                                         if (p->confirmanswer) {
2678                                                 p->subs[index].f.frametype = AST_FRAME_NULL;
2679                                                 p->subs[index].f.subclass = 0;
2680                                         } else {
2681                                                 p->subs[index].f.frametype = AST_FRAME_CONTROL;
2682                                                 p->subs[index].f.subclass = AST_CONTROL_ANSWER;
2683                                                 ast_setstate(ast, AST_STATE_UP);
2684                                         }
2685                                 } else if (ast->_state != AST_STATE_RING)
2686                                         ast_log(LOG_WARNING, "Ring/Off-hook in strange state %d on channel %d\n", ast->_state, p->channel);
2687                                 break;
2688                         default:
2689                                 ast_log(LOG_WARNING, "Don't know how to handle ring/off hoook for signalling %d\n", p->sig);
2690                         }
2691                         break;
2692                 case ZT_EVENT_RINGEROFF:
2693                         if (p->inalarm) break;
2694                         if (p->radio) break;
2695                         ast->rings++;
2696                         if ((ast->rings > p->cidrings) && (p->cidspill)) {
2697                                 ast_log(LOG_WARNING, "Didn't finish Caller-ID spill.  Cancelling.\n");
2698                                 free(p->cidspill);
2699                                 p->cidspill = NULL;
2700                                 p->callwaitcas = 0;
2701                         }
2702                         p->subs[index].f.frametype = AST_FRAME_CONTROL;
2703                         p->subs[index].f.subclass = AST_CONTROL_RINGING;
2704                         break;
2705                 case ZT_EVENT_RINGERON:
2706                         break;
2707                 case ZT_EVENT_NOALARM:
2708                         p->inalarm = 0;
2709                         ast_log(LOG_NOTICE, "Alarm cleared on channel %d\n", p->channel);
2710                         break;
2711                 case ZT_EVENT_WINKFLASH:
2712                         if (p->inalarm) break;
2713                         if (p->radio) break;
2714                         /* Remember last time we got a flash-hook */
2715                         gettimeofday(&p->flashtime, NULL);
2716                         switch(p->sig) {
2717                         case SIG_FXOLS:
2718                         case SIG_FXOGS:
2719                         case SIG_FXOKS:
2720                                 ast_log(LOG_DEBUG, "Winkflash, index: %d, normal: %d, callwait: %d, thirdcall: %d\n",
2721                                         index, p->subs[SUB_REAL].zfd, p->subs[SUB_CALLWAIT].zfd, p->subs[SUB_THREEWAY].zfd);
2722                                 p->callwaitcas = 0;
2723                                 if (index == SUB_REAL) {
2724                                         if (p->subs[SUB_CALLWAIT].owner) {
2725                                                 /* Swap to call-wait */
2726                                                 swap_subs(p, SUB_REAL, SUB_CALLWAIT);
2727                                                 tone_zone_play_tone(p->subs[SUB_REAL].zfd, -1);
2728                                                 p->owner = p->subs[SUB_REAL].owner;
2729                                                 ast_log(LOG_DEBUG, "Making %s the new owner\n", p->owner->name);
2730                                                 if (p->owner->_state == AST_STATE_RINGING) {
2731                                                         ast_setstate(p->owner, AST_STATE_UP);
2732                                                         p->subs[SUB_REAL].needanswer = 1;
2733                                                 }
2734                                                 p->callwaitingrepeat = 0;
2735                                                 p->cidcwexpire = 0;
2736                                                 /* Start music on hold if appropriate */
2737                                                 if (!p->subs[SUB_CALLWAIT].inthreeway && p->subs[SUB_CALLWAIT].owner->bridge)
2738                                                                 ast_moh_start(p->subs[SUB_CALLWAIT].owner->bridge, NULL);
2739                                                 if (p->subs[SUB_REAL].owner->bridge)
2740                                                                 ast_moh_stop(p->subs[SUB_REAL].owner->bridge);
2741                                         } else if (!p->subs[SUB_THREEWAY].owner) {
2742                                                 if (p->threewaycalling && !check_for_conference(p)) {
2743                                                         /* XXX This section needs much more error checking!!! XXX */
2744                                                         /* Start a 3-way call if feasible */
2745                                                         if ((ast->pbx) ||
2746                                                                         (ast->_state == AST_STATE_UP) ||
2747                                                                         (ast->_state == AST_STATE_RING)) {
2748                                                                 if (!alloc_sub(p, SUB_THREEWAY)) {
2749                                                                         /* Make new channel */
2750                                                                         chan = zt_new(p, AST_STATE_RESERVED, 0, SUB_THREEWAY, 0);
2751                                                                         /* Swap things around between the three-way and real call */
2752                                                                         swap_subs(p, SUB_THREEWAY, SUB_REAL);
2753                                                                         /* Disable echo canceller for better dialing */
2754                                                                         zt_disable_ec(p);
2755                                                                         res = tone_zone_play_tone(p->subs[SUB_REAL].zfd, ZT_TONE_DIALRECALL);
2756                                                                         if (res)
2757                                                                                 ast_log(LOG_WARNING, "Unable to start dial recall tone on channel %d\n", p->channel);
2758                                                                         p->owner = chan;
2759                                                                         if (pthread_create(&threadid, &attr, ss_thread, chan)) {
2760                                                                                 ast_log(LOG_WARNING, "Unable to start simple switch on channel %d\n", p->channel);
2761                                                                                 res = tone_zone_play_tone(p->subs[SUB_REAL].zfd, ZT_TONE_CONGESTION);
2762                                                                                 zt_enable_ec(p);
2763                                                                                 ast_hangup(chan);
2764                                                                         } else {
2765                                                                                 if (option_verbose > 2) 
2766                                                                                         ast_verbose(VERBOSE_PREFIX_3 "Started three way call on channel %d\n", p->channel);
2767                                                                                 /* Start music on hold if appropriate */
2768                                                                                 if (p->subs[SUB_THREEWAY].owner->bridge)
2769                                                                                         ast_moh_start(p->subs[SUB_THREEWAY].owner->bridge, NULL);
2770                                                                         }               
2771                                                                 } else
2772                                                                         ast_log(LOG_WARNING, "Unable to allocate three-way subchannel\n");
2773                                                         } else 
2774                                                                 ast_log(LOG_DEBUG, "Flash when call not up or ringing\n");
2775                                                 }
2776                                         } else {
2777                                                 /* Already have a 3 way call */
2778                                                 if (p->subs[SUB_THREEWAY].inthreeway) {
2779                                                         /* Call is already up, drop the last person */
2780                                                         if (option_debug)
2781                                                                 ast_log(LOG_DEBUG, "Got flash with three way call up, dropping last call on %d\n", p->channel);
2782                                                         /* If the primary call isn't answered yet, use it */
2783                                                         if ((p->subs[SUB_REAL].owner->_state != AST_STATE_UP) && (p->subs[SUB_THREEWAY].owner->_state == AST_STATE_UP)) {
2784                                                                 /* Swap back -- we're droppign the real 3-way that isn't finished yet*/
2785                                                                 swap_subs(p, SUB_THREEWAY, SUB_REAL);
2786                                                                 p->owner = p->subs[SUB_REAL].owner;
2787                                                         }
2788                                                         /* Drop the last call and stop the conference */
2789                                                         if (option_verbose > 2)
2790                                                                 ast_verbose(VERBOSE_PREFIX_3 "Dropping three-way call on %s\n", p->subs[SUB_THREEWAY].owner->name);
2791                                                         p->subs[SUB_THREEWAY].owner->_softhangup |= AST_SOFTHANGUP_DEV;
2792                                                         p->subs[SUB_REAL].inthreeway = 0;
2793                                                         p->subs[SUB_THREEWAY].inthreeway = 0;
2794                                                 } else {
2795                                                         /* Lets see what we're up to */
2796                                                         if ((ast->pbx) ||
2797                                                                         (ast->_state == AST_STATE_UP)) {
2798                                                                 int otherindex = SUB_THREEWAY;
2799                                                                 if (option_verbose > 2)
2800                                                                         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);
2801                                                                 /* Put them in the threeway, and flip */
2802                                                                 p->subs[SUB_THREEWAY].inthreeway = 1;
2803                                                                 p->subs[SUB_REAL].inthreeway = 1;
2804                                                                 if (ast->_state == AST_STATE_UP) {
2805                                                                         swap_subs(p, SUB_THREEWAY, SUB_REAL);
2806                                                                         otherindex = SUB_REAL;
2807                                                                 }
2808                                                                 if (p->subs[otherindex].owner && p->subs[otherindex].owner->bridge)
2809                                                                         ast_moh_stop(p->subs[otherindex].owner->bridge);
2810                                                                 p->owner = p->subs[SUB_REAL].owner;
2811                                                                 if (ast->_state == AST_STATE_RINGING) {
2812                                                                         ast_log(LOG_DEBUG, "Enabling ringtone on real and threeway\n");
2813                                                                         res = tone_zone_play_tone(p->subs[SUB_REAL].zfd, ZT_TONE_RINGTONE);
2814                                                                         res = tone_zone_play_tone(p->subs[SUB_THREEWAY].zfd, ZT_TONE_RINGTONE);
2815                                                                 }
2816                                                         } else {
2817                                                            &nbs