Merge ast_str_opaque branch (discontinue usage of ast_str internals)
[asterisk/asterisk.git] / main / cdr.c
1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 1999 - 2006, Digium, Inc.
5  *
6  * Mark Spencer <markster@digium.com>
7  *
8  * See http://www.asterisk.org for more information about
9  * the Asterisk project. Please do not directly contact
10  * any of the maintainers of this project for assistance;
11  * the project provides a web site, mailing lists and IRC
12  * channels for your use.
13  *
14  * This program is free software, distributed under the terms of
15  * the GNU General Public License Version 2. See the LICENSE file
16  * at the top of the source tree.
17  */
18
19 /*! \file
20  *
21  * \brief Call Detail Record API 
22  *
23  * \author Mark Spencer <markster@digium.com>
24  * 
25  * \note Includes code and algorithms from the Zapata library.
26  *
27  * \note We do a lot of checking here in the CDR code to try to be sure we don't ever let a CDR slip
28  * through our fingers somehow.  If someone allocates a CDR, it must be completely handled normally
29  * or a WARNING shall be logged, so that we can best keep track of any escape condition where the CDR
30  * isn't properly generated and posted.
31  */
32
33
34 #include "asterisk.h"
35
36 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
37
38 #include <signal.h>
39
40 #include "asterisk/lock.h"
41 #include "asterisk/channel.h"
42 #include "asterisk/cdr.h"
43 #include "asterisk/callerid.h"
44 #include "asterisk/manager.h"
45 #include "asterisk/causes.h"
46 #include "asterisk/linkedlists.h"
47 #include "asterisk/utils.h"
48 #include "asterisk/sched.h"
49 #include "asterisk/config.h"
50 #include "asterisk/cli.h"
51 #include "asterisk/stringfields.h"
52
53 /*! Default AMA flag for billing records (CDR's) */
54 int ast_default_amaflags = AST_CDR_DOCUMENTATION;
55 char ast_default_accountcode[AST_MAX_ACCOUNT_CODE];
56
57 struct ast_cdr_beitem {
58         char name[20];
59         char desc[80];
60         ast_cdrbe be;
61         AST_RWLIST_ENTRY(ast_cdr_beitem) list;
62 };
63
64 static AST_RWLIST_HEAD_STATIC(be_list, ast_cdr_beitem);
65
66 struct ast_cdr_batch_item {
67         struct ast_cdr *cdr;
68         struct ast_cdr_batch_item *next;
69 };
70
71 static struct ast_cdr_batch {
72         int size;
73         struct ast_cdr_batch_item *head;
74         struct ast_cdr_batch_item *tail;
75 } *batch = NULL;
76
77 static struct sched_context *sched;
78 static int cdr_sched = -1;
79 static pthread_t cdr_thread = AST_PTHREADT_NULL;
80
81 #define BATCH_SIZE_DEFAULT 100
82 #define BATCH_TIME_DEFAULT 300
83 #define BATCH_SCHEDULER_ONLY_DEFAULT 0
84 #define BATCH_SAFE_SHUTDOWN_DEFAULT 1
85
86 static int enabled;             /*! Is the CDR subsystem enabled ? */
87 static int unanswered;
88 static int batchmode;
89 static int batchsize;
90 static int batchtime;
91 static int batchscheduleronly;
92 static int batchsafeshutdown;
93
94 AST_MUTEX_DEFINE_STATIC(cdr_batch_lock);
95
96 /* these are used to wake up the CDR thread when there's work to do */
97 AST_MUTEX_DEFINE_STATIC(cdr_pending_lock);
98 static ast_cond_t cdr_pending_cond;
99
100 int check_cdr_enabled()
101 {
102         return enabled;
103 }
104
105 /*! Register a CDR driver. Each registered CDR driver generates a CDR 
106         \return 0 on success, -1 on failure 
107 */
108 int ast_cdr_register(const char *name, const char *desc, ast_cdrbe be)
109 {
110         struct ast_cdr_beitem *i = NULL;
111
112         if (!name)
113                 return -1;
114
115         if (!be) {
116                 ast_log(LOG_WARNING, "CDR engine '%s' lacks backend\n", name);
117                 return -1;
118         }
119
120         AST_RWLIST_WRLOCK(&be_list);
121         AST_RWLIST_TRAVERSE(&be_list, i, list) {
122                 if (!strcasecmp(name, i->name)) {
123                         ast_log(LOG_WARNING, "Already have a CDR backend called '%s'\n", name);
124                         AST_RWLIST_UNLOCK(&be_list);
125                         return -1;
126                 }
127         }
128
129         if (!(i = ast_calloc(1, sizeof(*i))))   
130                 return -1;
131
132         i->be = be;
133         ast_copy_string(i->name, name, sizeof(i->name));
134         ast_copy_string(i->desc, desc, sizeof(i->desc));
135
136         AST_RWLIST_INSERT_HEAD(&be_list, i, list);
137         AST_RWLIST_UNLOCK(&be_list);
138
139         return 0;
140 }
141
142 /*! unregister a CDR driver */
143 void ast_cdr_unregister(const char *name)
144 {
145         struct ast_cdr_beitem *i = NULL;
146
147         AST_RWLIST_WRLOCK(&be_list);
148         AST_RWLIST_TRAVERSE_SAFE_BEGIN(&be_list, i, list) {
149                 if (!strcasecmp(name, i->name)) {
150                         AST_RWLIST_REMOVE_CURRENT(list);
151                         ast_verb(2, "Unregistered '%s' CDR backend\n", name);
152                         ast_free(i);
153                         break;
154                 }
155         }
156         AST_RWLIST_TRAVERSE_SAFE_END;
157         AST_RWLIST_UNLOCK(&be_list);
158 }
159
160 int ast_cdr_isset_unanswered(void)
161 {
162         return unanswered;
163 }
164
165 /*! Duplicate a CDR record 
166         \returns Pointer to new CDR record
167 */
168 struct ast_cdr *ast_cdr_dup(struct ast_cdr *cdr) 
169 {
170         struct ast_cdr *newcdr;
171         
172         if (!cdr) /* don't die if we get a null cdr pointer */
173                 return NULL;
174         newcdr = ast_cdr_alloc();
175         if (!newcdr)
176                 return NULL;
177
178         memcpy(newcdr, cdr, sizeof(*newcdr));
179         /* The varshead is unusable, volatile even, after the memcpy so we take care of that here */
180         memset(&newcdr->varshead, 0, sizeof(newcdr->varshead));
181         ast_cdr_copy_vars(newcdr, cdr);
182         newcdr->next = NULL;
183
184         return newcdr;
185 }
186
187 static const char *ast_cdr_getvar_internal(struct ast_cdr *cdr, const char *name, int recur) 
188 {
189         if (ast_strlen_zero(name))
190                 return NULL;
191
192         for (; cdr; cdr = recur ? cdr->next : NULL) {
193                 struct ast_var_t *variables;
194                 struct varshead *headp = &cdr->varshead;
195                 AST_LIST_TRAVERSE(headp, variables, entries) {
196                         if (!strcasecmp(name, ast_var_name(variables)))
197                                 return ast_var_value(variables);
198                 }
199         }
200
201         return NULL;
202 }
203
204 static void cdr_get_tv(struct timeval when, const char *fmt, char *buf, int bufsize)
205 {
206         if (fmt == NULL) {      /* raw mode */
207                 snprintf(buf, bufsize, "%ld.%06ld", (long)when.tv_sec, (long)when.tv_usec);
208         } else {
209                 if (when.tv_sec) {
210                         struct ast_tm tm;
211                         
212                         ast_localtime(&when, &tm, NULL);
213                         ast_strftime(buf, bufsize, fmt, &tm);
214                 }
215         }
216 }
217
218 /*! CDR channel variable retrieval */
219 void ast_cdr_getvar(struct ast_cdr *cdr, const char *name, char **ret, char *workspace, int workspacelen, int recur, int raw) 
220 {
221         const char *fmt = "%Y-%m-%d %T";
222         const char *varbuf;
223
224         if (!cdr)  /* don't die if the cdr is null */
225                 return;
226
227         *ret = NULL;
228         /* special vars (the ones from the struct ast_cdr when requested by name) 
229            I'd almost say we should convert all the stringed vals to vars */
230
231         if (!strcasecmp(name, "clid"))
232                 ast_copy_string(workspace, cdr->clid, workspacelen);
233         else if (!strcasecmp(name, "src"))
234                 ast_copy_string(workspace, cdr->src, workspacelen);
235         else if (!strcasecmp(name, "dst"))
236                 ast_copy_string(workspace, cdr->dst, workspacelen);
237         else if (!strcasecmp(name, "dcontext"))
238                 ast_copy_string(workspace, cdr->dcontext, workspacelen);
239         else if (!strcasecmp(name, "channel"))
240                 ast_copy_string(workspace, cdr->channel, workspacelen);
241         else if (!strcasecmp(name, "dstchannel"))
242                 ast_copy_string(workspace, cdr->dstchannel, workspacelen);
243         else if (!strcasecmp(name, "lastapp"))
244                 ast_copy_string(workspace, cdr->lastapp, workspacelen);
245         else if (!strcasecmp(name, "lastdata"))
246                 ast_copy_string(workspace, cdr->lastdata, workspacelen);
247         else if (!strcasecmp(name, "start"))
248                 cdr_get_tv(cdr->start, raw ? NULL : fmt, workspace, workspacelen);
249         else if (!strcasecmp(name, "answer"))
250                 cdr_get_tv(cdr->answer, raw ? NULL : fmt, workspace, workspacelen);
251         else if (!strcasecmp(name, "end"))
252                 cdr_get_tv(cdr->end, raw ? NULL : fmt, workspace, workspacelen);
253         else if (!strcasecmp(name, "duration"))
254                 snprintf(workspace, workspacelen, "%ld", cdr->duration ? cdr->duration : (long)ast_tvdiff_ms(ast_tvnow(), cdr->start) / 1000);
255         else if (!strcasecmp(name, "billsec"))
256                 snprintf(workspace, workspacelen, "%ld", cdr->billsec || cdr->answer.tv_sec == 0 ? cdr->billsec : (long)ast_tvdiff_ms(ast_tvnow(), cdr->answer) / 1000);
257         else if (!strcasecmp(name, "disposition")) {
258                 if (raw) {
259                         snprintf(workspace, workspacelen, "%ld", cdr->disposition);
260                 } else {
261                         ast_copy_string(workspace, ast_cdr_disp2str(cdr->disposition), workspacelen);
262                 }
263         } else if (!strcasecmp(name, "amaflags")) {
264                 if (raw) {
265                         snprintf(workspace, workspacelen, "%ld", cdr->amaflags);
266                 } else {
267                         ast_copy_string(workspace, ast_cdr_flags2str(cdr->amaflags), workspacelen);
268                 }
269         } else if (!strcasecmp(name, "accountcode"))
270                 ast_copy_string(workspace, cdr->accountcode, workspacelen);
271         else if (!strcasecmp(name, "uniqueid"))
272                 ast_copy_string(workspace, cdr->uniqueid, workspacelen);
273         else if (!strcasecmp(name, "userfield"))
274                 ast_copy_string(workspace, cdr->userfield, workspacelen);
275         else if ((varbuf = ast_cdr_getvar_internal(cdr, name, recur)))
276                 ast_copy_string(workspace, varbuf, workspacelen);
277         else
278                 workspace[0] = '\0';
279
280         if (!ast_strlen_zero(workspace))
281                 *ret = workspace;
282 }
283
284 /* readonly cdr variables */
285 static  const char *cdr_readonly_vars[] = { "clid", "src", "dst", "dcontext", "channel", "dstchannel",
286                                     "lastapp", "lastdata", "start", "answer", "end", "duration",
287                                     "billsec", "disposition", "amaflags", "accountcode", "uniqueid",
288                                     "userfield", NULL };
289 /*! Set a CDR channel variable 
290         \note You can't set the CDR variables that belong to the actual CDR record, like "billsec".
291 */
292 int ast_cdr_setvar(struct ast_cdr *cdr, const char *name, const char *value, int recur) 
293 {
294         struct ast_var_t *newvariable;
295         struct varshead *headp;
296         int x;
297         
298         if (!cdr)  /* don't die if the cdr is null */
299                 return -1;
300         
301         for (x = 0; cdr_readonly_vars[x]; x++) {
302                 if (!strcasecmp(name, cdr_readonly_vars[x])) {
303                         ast_log(LOG_ERROR, "Attempt to set the '%s' read-only variable!.\n", name);
304                         return -1;
305                 }
306         }
307
308         if (!cdr) {
309                 ast_log(LOG_ERROR, "Attempt to set a variable on a nonexistent CDR record.\n");
310                 return -1;
311         }
312
313         for (; cdr; cdr = recur ? cdr->next : NULL) {
314                 if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
315                         continue;
316                 headp = &cdr->varshead;
317                 AST_LIST_TRAVERSE_SAFE_BEGIN(headp, newvariable, entries) {
318                         if (!strcasecmp(ast_var_name(newvariable), name)) {
319                                 /* there is already such a variable, delete it */
320                                 AST_LIST_REMOVE_CURRENT(entries);
321                                 ast_var_delete(newvariable);
322                                 break;
323                         }
324                 }
325                 AST_LIST_TRAVERSE_SAFE_END;
326                 
327                 if (value) {
328                         newvariable = ast_var_assign(name, value);
329                         AST_LIST_INSERT_HEAD(headp, newvariable, entries);
330                 }
331         }
332
333         return 0;
334 }
335
336 int ast_cdr_copy_vars(struct ast_cdr *to_cdr, struct ast_cdr *from_cdr)
337 {
338         struct ast_var_t *variables, *newvariable = NULL;
339         struct varshead *headpa, *headpb;
340         const char *var, *val;
341         int x = 0;
342
343         if (!to_cdr || !from_cdr) /* don't die if one of the pointers is null */
344                 return 0;
345
346         headpa = &from_cdr->varshead;
347         headpb = &to_cdr->varshead;
348
349         AST_LIST_TRAVERSE(headpa,variables,entries) {
350                 if (variables &&
351                     (var = ast_var_name(variables)) && (val = ast_var_value(variables)) &&
352                     !ast_strlen_zero(var) && !ast_strlen_zero(val)) {
353                         newvariable = ast_var_assign(var, val);
354                         AST_LIST_INSERT_HEAD(headpb, newvariable, entries);
355                         x++;
356                 }
357         }
358
359         return x;
360 }
361
362 int ast_cdr_serialize_variables(struct ast_cdr *cdr, struct ast_str **buf, char delim, char sep, int recur) 
363 {
364         struct ast_var_t *variables;
365         const char *var, *val;
366         char *tmp;
367         char workspace[256];
368         int total = 0, x = 0, i;
369
370         ast_str_reset(*buf);
371
372         for (; cdr; cdr = recur ? cdr->next : NULL) {
373                 if (++x > 1)
374                         ast_str_append(buf, 0, "\n");
375
376                 AST_LIST_TRAVERSE(&cdr->varshead, variables, entries) {
377                         if (variables &&
378                             (var = ast_var_name(variables)) && (val = ast_var_value(variables)) &&
379                             !ast_strlen_zero(var) && !ast_strlen_zero(val)) {
380                                 if (ast_str_append(buf, 0, "level %d: %s%c%s%c", x, var, delim, val, sep) < 0) {
381                                         ast_log(LOG_ERROR, "Data Buffer Size Exceeded!\n");
382                                         break;
383                                 } else
384                                         total++;
385                         } else 
386                                 break;
387                 }
388
389                 for (i = 0; cdr_readonly_vars[i]; i++) {
390                         workspace[0] = 0; /* null out the workspace, because the cdr_get_tv() won't write anything if time is NULL, so you get old vals */
391                         ast_cdr_getvar(cdr, cdr_readonly_vars[i], &tmp, workspace, sizeof(workspace), 0, 0);
392                         if (!tmp)
393                                 continue;
394                         
395                         if (ast_str_append(buf, 0, "level %d: %s%c%s%c", x, cdr_readonly_vars[i], delim, tmp, sep) < 0) {
396                                 ast_log(LOG_ERROR, "Data Buffer Size Exceeded!\n");
397                                 break;
398                         } else
399                                 total++;
400                 }
401         }
402
403         return total;
404 }
405
406
407 void ast_cdr_free_vars(struct ast_cdr *cdr, int recur)
408 {
409
410         /* clear variables */
411         for (; cdr; cdr = recur ? cdr->next : NULL) {
412                 struct ast_var_t *vardata;
413                 struct varshead *headp = &cdr->varshead;
414                 while ((vardata = AST_LIST_REMOVE_HEAD(headp, entries)))
415                         ast_var_delete(vardata);
416         }
417 }
418
419 /*! \brief  print a warning if cdr already posted */
420 static void check_post(struct ast_cdr *cdr)
421 {
422         if (!cdr)
423                 return;
424         if (ast_test_flag(cdr, AST_CDR_FLAG_POSTED))
425                 ast_log(LOG_NOTICE, "CDR on channel '%s' already posted\n", S_OR(cdr->channel, "<unknown>"));
426 }
427
428 void ast_cdr_free(struct ast_cdr *cdr)
429 {
430
431         while (cdr) {
432                 struct ast_cdr *next = cdr->next;
433
434                 ast_cdr_free_vars(cdr, 0);
435                 ast_free(cdr);
436                 cdr = next;
437         }
438 }
439
440 /*! \brief the same as a cdr_free call, only with no checks; just get rid of it */
441 void ast_cdr_discard(struct ast_cdr *cdr)
442 {
443         while (cdr) {
444                 struct ast_cdr *next = cdr->next;
445
446                 ast_cdr_free_vars(cdr, 0);
447                 ast_free(cdr);
448                 cdr = next;
449         }
450 }
451
452 struct ast_cdr *ast_cdr_alloc(void)
453 {
454         struct ast_cdr *x;
455         x = ast_calloc(1, sizeof(*x));
456         if (!x)
457                 ast_log(LOG_ERROR,"Allocation Failure for a CDR!\n");
458         return x;
459 }
460
461 static void cdr_merge_vars(struct ast_cdr *to, struct ast_cdr *from)
462 {
463         struct ast_var_t *variablesfrom,*variablesto;
464         struct varshead *headpfrom = &to->varshead;
465         struct varshead *headpto = &from->varshead;
466         AST_LIST_TRAVERSE_SAFE_BEGIN(headpfrom, variablesfrom, entries) {
467                 /* for every var in from, stick it in to */
468                 const char *fromvarname, *fromvarval;
469                 const char *tovarname = NULL, *tovarval = NULL;
470                 fromvarname = ast_var_name(variablesfrom);
471                 fromvarval = ast_var_value(variablesfrom);
472                 tovarname = 0;
473
474                 /* now, quick see if that var is in the 'to' cdr already */
475                 AST_LIST_TRAVERSE(headpto, variablesto, entries) {
476
477                         /* now, quick see if that var is in the 'to' cdr already */
478                         if ( strcasecmp(fromvarname, ast_var_name(variablesto)) == 0 ) {
479                                 tovarname = ast_var_name(variablesto);
480                                 tovarval = ast_var_value(variablesto);
481                                 break;
482                         }
483                 }
484                 if (tovarname && strcasecmp(fromvarval,tovarval) != 0) {  /* this message here to see how irritating the userbase finds it */
485                         ast_log(LOG_NOTICE, "Merging CDR's: variable %s value %s dropped in favor of value %s\n", tovarname, fromvarval, tovarval);
486                         continue;
487                 } else if (tovarname && strcasecmp(fromvarval,tovarval) == 0) /* if they are the same, the job is done */
488                         continue;
489
490                 /* rip this var out of the from cdr, and stick it in the to cdr */
491                 AST_LIST_MOVE_CURRENT(headpto, entries);
492         }
493         AST_LIST_TRAVERSE_SAFE_END;
494 }
495
496 void ast_cdr_merge(struct ast_cdr *to, struct ast_cdr *from)
497 {
498         struct ast_cdr *zcdr;
499         struct ast_cdr *lto = NULL;
500         struct ast_cdr *lfrom = NULL;
501         int discard_from = 0;
502         
503         if (!to || !from)
504                 return;
505
506         /* don't merge into locked CDR's -- it's bad business */
507         if (ast_test_flag(to, AST_CDR_FLAG_LOCKED)) {
508                 zcdr = to; /* safety valve? */
509                 while (to->next) {
510                         lto = to;
511                         to = to->next;
512                 }
513                 
514                 if (ast_test_flag(to, AST_CDR_FLAG_LOCKED)) {
515                         ast_log(LOG_WARNING, "Merging into locked CDR... no choice.");
516                         to = zcdr; /* safety-- if all there are is locked CDR's, then.... ?? */
517                         lto = NULL;
518                 }
519         }
520
521         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED)) {
522                 struct ast_cdr *llfrom = NULL;
523                 discard_from = 1;
524                 if (lto) {
525                         /* insert the from stuff after lto */
526                         lto->next = from;
527                         lfrom = from;
528                         while (lfrom && lfrom->next) {
529                                 if (!lfrom->next->next)
530                                         llfrom = lfrom;
531                                 lfrom = lfrom->next; 
532                         }
533                         /* rip off the last entry and put a copy of the to at the end */
534                         llfrom->next = to;
535                         from = lfrom;
536                 } else {
537                         /* save copy of the current *to cdr */
538                         struct ast_cdr tcdr;
539                         memcpy(&tcdr, to, sizeof(tcdr));
540                         /* copy in the locked from cdr */
541                         memcpy(to, from, sizeof(*to));
542                         lfrom = from;
543                         while (lfrom && lfrom->next) {
544                                 if (!lfrom->next->next)
545                                         llfrom = lfrom;
546                                 lfrom = lfrom->next; 
547                         }
548                         from->next = NULL;
549                         /* rip off the last entry and put a copy of the to at the end */
550                         if (llfrom == from)
551                                 to = to->next = ast_cdr_dup(&tcdr);
552                         else
553                                 to = llfrom->next = ast_cdr_dup(&tcdr);
554                         from = lfrom;
555                 }
556         }
557         
558         if (!ast_tvzero(from->start)) {
559                 if (!ast_tvzero(to->start)) {
560                         if (ast_tvcmp(to->start, from->start) > 0 ) {
561                                 to->start = from->start; /* use the earliest time */
562                                 from->start = ast_tv(0,0); /* we actively "steal" these values */
563                         }
564                         /* else nothing to do */
565                 } else {
566                         to->start = from->start;
567                         from->start = ast_tv(0,0); /* we actively "steal" these values */
568                 }
569         }
570         if (!ast_tvzero(from->answer)) {
571                 if (!ast_tvzero(to->answer)) {
572                         if (ast_tvcmp(to->answer, from->answer) > 0 ) {
573                                 to->answer = from->answer; /* use the earliest time */
574                                 from->answer = ast_tv(0,0); /* we actively "steal" these values */
575                         }
576                         /* we got the earliest answer time, so we'll settle for that? */
577                 } else {
578                         to->answer = from->answer;
579                         from->answer = ast_tv(0,0); /* we actively "steal" these values */
580                 }
581         }
582         if (!ast_tvzero(from->end)) {
583                 if (!ast_tvzero(to->end)) {
584                         if (ast_tvcmp(to->end, from->end) < 0 ) {
585                                 to->end = from->end; /* use the latest time */
586                                 from->end = ast_tv(0,0); /* we actively "steal" these values */
587                                 to->duration = to->end.tv_sec - to->start.tv_sec;  /* don't forget to update the duration, billsec, when we set end */
588                                 to->billsec = ast_tvzero(to->answer) ? 0 : to->end.tv_sec - to->answer.tv_sec;
589                         }
590                         /* else, nothing to do */
591                 } else {
592                         to->end = from->end;
593                         from->end = ast_tv(0,0); /* we actively "steal" these values */
594                         to->duration = to->end.tv_sec - to->start.tv_sec;
595                         to->billsec = ast_tvzero(to->answer) ? 0 : to->end.tv_sec - to->answer.tv_sec;
596                 }
597         }
598         if (to->disposition < from->disposition) {
599                 to->disposition = from->disposition;
600                 from->disposition = AST_CDR_NOANSWER;
601         }
602         if (ast_strlen_zero(to->lastapp) && !ast_strlen_zero(from->lastapp)) {
603                 ast_copy_string(to->lastapp, from->lastapp, sizeof(to->lastapp));
604                 from->lastapp[0] = 0; /* theft */
605         }
606         if (ast_strlen_zero(to->lastdata) && !ast_strlen_zero(from->lastdata)) {
607                 ast_copy_string(to->lastdata, from->lastdata, sizeof(to->lastdata));
608                 from->lastdata[0] = 0; /* theft */
609         }
610         if (ast_strlen_zero(to->dcontext) && !ast_strlen_zero(from->dcontext)) {
611                 ast_copy_string(to->dcontext, from->dcontext, sizeof(to->dcontext));
612                 from->dcontext[0] = 0; /* theft */
613         }
614         if (ast_strlen_zero(to->dstchannel) && !ast_strlen_zero(from->dstchannel)) {
615                 ast_copy_string(to->dstchannel, from->dstchannel, sizeof(to->dstchannel));
616                 from->dstchannel[0] = 0; /* theft */
617         }
618         if (!ast_strlen_zero(from->channel) && (ast_strlen_zero(to->channel) || !strncasecmp(from->channel, "Agent/", 6))) {
619                 ast_copy_string(to->channel, from->channel, sizeof(to->channel));
620                 from->channel[0] = 0; /* theft */
621         }
622         if (ast_strlen_zero(to->src) && !ast_strlen_zero(from->src)) {
623                 ast_copy_string(to->src, from->src, sizeof(to->src));
624                 from->src[0] = 0; /* theft */
625         }
626         if (ast_strlen_zero(to->clid) && !ast_strlen_zero(from->clid)) {
627                 ast_copy_string(to->clid, from->clid, sizeof(to->clid));
628                 from->clid[0] = 0; /* theft */
629         }
630         if (ast_strlen_zero(to->dst) && !ast_strlen_zero(from->dst)) {
631                 ast_copy_string(to->dst, from->dst, sizeof(to->dst));
632                 from->dst[0] = 0; /* theft */
633         }
634         if (!to->amaflags)
635                 to->amaflags = AST_CDR_DOCUMENTATION;
636         if (!from->amaflags)
637                 from->amaflags = AST_CDR_DOCUMENTATION; /* make sure both amaflags are set to something (DOC is default) */
638         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (to->amaflags == AST_CDR_DOCUMENTATION && from->amaflags != AST_CDR_DOCUMENTATION)) {
639                 to->amaflags = from->amaflags;
640         }
641         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->accountcode) && !ast_strlen_zero(from->accountcode))) {
642                 ast_copy_string(to->accountcode, from->accountcode, sizeof(to->accountcode));
643         }
644         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->userfield) && !ast_strlen_zero(from->userfield))) {
645                 ast_copy_string(to->userfield, from->userfield, sizeof(to->userfield));
646         }
647         /* flags, varsead, ? */
648         cdr_merge_vars(from, to);
649
650         if (ast_test_flag(from, AST_CDR_FLAG_KEEP_VARS))
651                 ast_set_flag(to, AST_CDR_FLAG_KEEP_VARS);
652         if (ast_test_flag(from, AST_CDR_FLAG_POSTED))
653                 ast_set_flag(to, AST_CDR_FLAG_POSTED);
654         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED))
655                 ast_set_flag(to, AST_CDR_FLAG_LOCKED);
656         if (ast_test_flag(from, AST_CDR_FLAG_CHILD))
657                 ast_set_flag(to, AST_CDR_FLAG_CHILD);
658         if (ast_test_flag(from, AST_CDR_FLAG_POST_DISABLED))
659                 ast_set_flag(to, AST_CDR_FLAG_POST_DISABLED);
660
661         /* last, but not least, we need to merge any forked CDRs to the 'to' cdr */
662         while (from->next) {
663                 /* just rip 'em off the 'from' and insert them on the 'to' */
664                 zcdr = from->next;
665                 from->next = zcdr->next;
666                 zcdr->next = NULL;
667                 /* zcdr is now ripped from the current list; */
668                 ast_cdr_append(to, zcdr);
669         }
670         if (discard_from)
671                 ast_cdr_discard(from);
672 }
673
674 void ast_cdr_start(struct ast_cdr *cdr)
675 {
676         char *chan; 
677
678         for (; cdr; cdr = cdr->next) {
679                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
680                         chan = S_OR(cdr->channel, "<unknown>");
681                         check_post(cdr);
682                         cdr->start = ast_tvnow();
683                 }
684         }
685 }
686
687 void ast_cdr_answer(struct ast_cdr *cdr)
688 {
689
690         for (; cdr; cdr = cdr->next) {
691                 if (ast_test_flag(cdr, AST_CDR_FLAG_ANSLOCKED)) 
692                         continue;
693                 if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
694                         continue;
695                 check_post(cdr);
696                 if (cdr->disposition < AST_CDR_ANSWERED)
697                         cdr->disposition = AST_CDR_ANSWERED;
698                 if (ast_tvzero(cdr->answer))
699                         cdr->answer = ast_tvnow();
700         }
701 }
702
703 void ast_cdr_busy(struct ast_cdr *cdr)
704 {
705
706         for (; cdr; cdr = cdr->next) {
707                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
708                         check_post(cdr);
709                         if (cdr->disposition < AST_CDR_BUSY)
710                                 cdr->disposition = AST_CDR_BUSY;
711                 }
712         }
713 }
714
715 void ast_cdr_failed(struct ast_cdr *cdr)
716 {
717         for (; cdr; cdr = cdr->next) {
718                 check_post(cdr);
719                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
720                         check_post(cdr);
721                         if (cdr->disposition < AST_CDR_FAILED)
722                                 cdr->disposition = AST_CDR_FAILED;
723                 }
724         }
725 }
726
727 void ast_cdr_noanswer(struct ast_cdr *cdr)
728 {
729         char *chan; 
730
731         while (cdr) {
732                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
733                         chan = !ast_strlen_zero(cdr->channel) ? cdr->channel : "<unknown>";
734                         if (ast_test_flag(cdr, AST_CDR_FLAG_POSTED))
735                                 ast_log(LOG_WARNING, "CDR on channel '%s' already posted\n", chan);
736                         if (cdr->disposition < AST_CDR_NOANSWER)
737                                 cdr->disposition = AST_CDR_NOANSWER;
738                 }
739                 cdr = cdr->next;
740         }
741 }
742
743 /* everywhere ast_cdr_disposition is called, it will call ast_cdr_failed() 
744    if ast_cdr_disposition returns a non-zero value */
745
746 int ast_cdr_disposition(struct ast_cdr *cdr, int cause)
747 {
748         int res = 0;
749
750         for (; cdr; cdr = cdr->next) {
751                 switch (cause) {  /* handle all the non failure, busy cases, return 0 not to set disposition,
752                                                         return -1 to set disposition to FAILED */
753                 case AST_CAUSE_BUSY:
754                         ast_cdr_busy(cdr);
755                         break;
756                 case AST_CAUSE_NO_ANSWER:
757                         ast_cdr_noanswer(cdr);
758                         break;
759                 case AST_CAUSE_NORMAL:
760                         break;
761                 default:
762                         res = -1;
763                 }
764         }
765         return res;
766 }
767
768 void ast_cdr_setdestchan(struct ast_cdr *cdr, const char *chann)
769 {
770         for (; cdr; cdr = cdr->next) {
771                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
772                         check_post(cdr);
773                         ast_copy_string(cdr->dstchannel, chann, sizeof(cdr->dstchannel));
774                 }
775         }
776 }
777
778 void ast_cdr_setapp(struct ast_cdr *cdr, const char *app, const char *data)
779 {
780
781         for (; cdr; cdr = cdr->next) {
782                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
783                         check_post(cdr);
784                         ast_copy_string(cdr->lastapp, S_OR(app, ""), sizeof(cdr->lastapp));
785                         ast_copy_string(cdr->lastdata, S_OR(data, ""), sizeof(cdr->lastdata));
786                 }
787         }
788 }
789
790 /* set cid info for one record */
791 static void set_one_cid(struct ast_cdr *cdr, struct ast_channel *c)
792 {
793         /* Grab source from ANI or normal Caller*ID */
794         const char *num = S_OR(c->cid.cid_ani, c->cid.cid_num);
795         if (!cdr)
796                 return;
797         if (!ast_strlen_zero(c->cid.cid_name)) {
798                 if (!ast_strlen_zero(num))      /* both name and number */
799                         snprintf(cdr->clid, sizeof(cdr->clid), "\"%s\" <%s>", c->cid.cid_name, num);
800                 else                            /* only name */
801                         ast_copy_string(cdr->clid, c->cid.cid_name, sizeof(cdr->clid));
802         } else if (!ast_strlen_zero(num)) {     /* only number */
803                 ast_copy_string(cdr->clid, num, sizeof(cdr->clid));
804         } else {                                /* nothing known */
805                 cdr->clid[0] = '\0';
806         }
807         ast_copy_string(cdr->src, S_OR(num, ""), sizeof(cdr->src));
808
809 }
810 int ast_cdr_setcid(struct ast_cdr *cdr, struct ast_channel *c)
811 {
812         for (; cdr; cdr = cdr->next) {
813                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
814                         set_one_cid(cdr, c);
815         }
816         return 0;
817 }
818
819 int ast_cdr_init(struct ast_cdr *cdr, struct ast_channel *c)
820 {
821         char *chan;
822
823         for ( ; cdr ; cdr = cdr->next) {
824                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
825                         chan = S_OR(cdr->channel, "<unknown>");
826                         ast_copy_string(cdr->channel, c->name, sizeof(cdr->channel));
827                         set_one_cid(cdr, c);
828
829                         cdr->disposition = (c->_state == AST_STATE_UP) ?  AST_CDR_ANSWERED : AST_CDR_NULL;
830                         cdr->amaflags = c->amaflags ? c->amaflags :  ast_default_amaflags;
831                         ast_copy_string(cdr->accountcode, c->accountcode, sizeof(cdr->accountcode));
832                         /* Destination information */
833                         ast_copy_string(cdr->dst, S_OR(c->macroexten,c->exten), sizeof(cdr->dst));
834                         ast_copy_string(cdr->dcontext, S_OR(c->macrocontext,c->context), sizeof(cdr->dcontext));
835                         /* Unique call identifier */
836                         ast_copy_string(cdr->uniqueid, c->uniqueid, sizeof(cdr->uniqueid));
837                 }
838         }
839         return 0;
840 }
841
842 /* Three routines were "fixed" via 10668, and later shown that 
843    users were depending on this behavior. ast_cdr_end,
844    ast_cdr_setvar and ast_cdr_answer are the three routines.
845    While most of the other routines would not touch 
846    LOCKED cdr's, these three routines were designed to
847    operate on locked CDR's as a matter of course.
848    I now appreciate how this plays with the ForkCDR app,
849    which forms these cdr chains in the first place. 
850    cdr_end is pretty key: all cdrs created are closed
851    together. They only vary by start time. Arithmetically,
852    users can calculate the subintervals they wish to track. */
853
854 void ast_cdr_end(struct ast_cdr *cdr)
855 {
856         for ( ; cdr ; cdr = cdr->next) {
857                 if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
858                         continue;
859                 check_post(cdr);
860                 if (ast_tvzero(cdr->end))
861                         cdr->end = ast_tvnow();
862                 if (ast_tvzero(cdr->start)) {
863                         ast_log(LOG_WARNING, "CDR on channel '%s' has not started\n", S_OR(cdr->channel, "<unknown>"));
864                         cdr->disposition = AST_CDR_FAILED;
865                 } else
866                         cdr->duration = cdr->end.tv_sec - cdr->start.tv_sec;
867                 if (ast_tvzero(cdr->answer)) {
868                         if (cdr->disposition == AST_CDR_ANSWERED) {
869                                 ast_log(LOG_WARNING, "CDR on channel '%s' has no answer time but is 'ANSWERED'\n", S_OR(cdr->channel, "<unknown>"));
870                                 cdr->disposition = AST_CDR_FAILED;
871                         }
872                 } else {
873                         cdr->billsec = cdr->end.tv_sec - cdr->answer.tv_sec;
874                         if (ast_test_flag(&ast_options, AST_OPT_FLAG_INITIATED_SECONDS))
875                                 cdr->billsec += cdr->end.tv_usec > cdr->answer.tv_usec ? 1 : 0;
876                 }
877         }
878 }
879
880 char *ast_cdr_disp2str(int disposition)
881 {
882         switch (disposition) {
883         case AST_CDR_NULL:
884                 return "NO ANSWER"; /* by default, for backward compatibility */
885         case AST_CDR_NOANSWER:
886                 return "NO ANSWER";
887         case AST_CDR_FAILED:
888                 return "FAILED";                
889         case AST_CDR_BUSY:
890                 return "BUSY";          
891         case AST_CDR_ANSWERED:
892                 return "ANSWERED";
893         }
894         return "UNKNOWN";
895 }
896
897 /*! Converts AMA flag to printable string */
898 char *ast_cdr_flags2str(int flag)
899 {
900         switch (flag) {
901         case AST_CDR_OMIT:
902                 return "OMIT";
903         case AST_CDR_BILLING:
904                 return "BILLING";
905         case AST_CDR_DOCUMENTATION:
906                 return "DOCUMENTATION";
907         }
908         return "Unknown";
909 }
910
911 int ast_cdr_setaccount(struct ast_channel *chan, const char *account)
912 {
913         struct ast_cdr *cdr = chan->cdr;
914         char buf[BUFSIZ/2] = "";
915         if (!ast_strlen_zero(chan->accountcode))
916                 ast_copy_string(buf, chan->accountcode, sizeof(buf));
917
918         ast_string_field_set(chan, accountcode, account);
919         for ( ; cdr ; cdr = cdr->next) {
920                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
921                         ast_copy_string(cdr->accountcode, chan->accountcode, sizeof(cdr->accountcode));
922                 }
923         }
924
925         /* Signal change of account code to manager */
926         manager_event(EVENT_FLAG_CALL, "NewAccountCode", "Channel: %s\r\nUniqueid: %s\r\nAccountCode: %s\r\nOldAccountCode: %s\r\n", chan->name, chan->uniqueid, chan->accountcode, buf);
927         return 0;
928 }
929
930 int ast_cdr_setamaflags(struct ast_channel *chan, const char *flag)
931 {
932         struct ast_cdr *cdr;
933         int newflag = ast_cdr_amaflags2int(flag);
934         if (newflag) {
935                 for (cdr = chan->cdr; cdr; cdr = cdr->next) {
936                         if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
937                                 cdr->amaflags = newflag;
938                         }
939                 }
940         }
941
942         return 0;
943 }
944
945 int ast_cdr_setuserfield(struct ast_channel *chan, const char *userfield)
946 {
947         struct ast_cdr *cdr = chan->cdr;
948
949         for ( ; cdr ; cdr = cdr->next) {
950                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) 
951                         ast_copy_string(cdr->userfield, userfield, sizeof(cdr->userfield));
952         }
953
954         return 0;
955 }
956
957 int ast_cdr_appenduserfield(struct ast_channel *chan, const char *userfield)
958 {
959         struct ast_cdr *cdr = chan->cdr;
960
961         for ( ; cdr ; cdr = cdr->next) {
962                 int len = strlen(cdr->userfield);
963
964                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
965                         ast_copy_string(cdr->userfield + len, userfield, sizeof(cdr->userfield) - len);
966         }
967
968         return 0;
969 }
970
971 int ast_cdr_update(struct ast_channel *c)
972 {
973         struct ast_cdr *cdr = c->cdr;
974
975         for ( ; cdr ; cdr = cdr->next) {
976                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
977                         set_one_cid(cdr, c);
978
979                         /* Copy account code et-al */   
980                         ast_copy_string(cdr->accountcode, c->accountcode, sizeof(cdr->accountcode));
981                         
982                         /* Destination information */ /* XXX privilege macro* ? */
983                         ast_copy_string(cdr->dst, S_OR(c->macroexten, c->exten), sizeof(cdr->dst));
984                         ast_copy_string(cdr->dcontext, S_OR(c->macrocontext, c->context), sizeof(cdr->dcontext));
985                 }
986         }
987
988         return 0;
989 }
990
991 int ast_cdr_amaflags2int(const char *flag)
992 {
993         if (!strcasecmp(flag, "default"))
994                 return 0;
995         if (!strcasecmp(flag, "omit"))
996                 return AST_CDR_OMIT;
997         if (!strcasecmp(flag, "billing"))
998                 return AST_CDR_BILLING;
999         if (!strcasecmp(flag, "documentation"))
1000                 return AST_CDR_DOCUMENTATION;
1001         return -1;
1002 }
1003
1004 static void post_cdr(struct ast_cdr *cdr)
1005 {
1006         char *chan;
1007         struct ast_cdr_beitem *i;
1008
1009         for ( ; cdr ; cdr = cdr->next) {
1010                 if (!unanswered && cdr->disposition < AST_CDR_ANSWERED && (ast_strlen_zero(cdr->channel) || ast_strlen_zero(cdr->dstchannel))) {
1011                         /* For people, who don't want to see unanswered single-channel events */
1012                         ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1013                         continue;
1014                 }
1015
1016                 chan = S_OR(cdr->channel, "<unknown>");
1017                 check_post(cdr);
1018                 ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
1019                 if (ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED))
1020                         continue;
1021                 AST_RWLIST_RDLOCK(&be_list);
1022                 AST_RWLIST_TRAVERSE(&be_list, i, list) {
1023                         i->be(cdr);
1024                 }
1025                 AST_RWLIST_UNLOCK(&be_list);
1026         }
1027 }
1028
1029 void ast_cdr_reset(struct ast_cdr *cdr, struct ast_flags *_flags)
1030 {
1031         struct ast_cdr *duplicate;
1032         struct ast_flags flags = { 0 };
1033
1034         if (_flags)
1035                 ast_copy_flags(&flags, _flags, AST_FLAGS_ALL);
1036
1037         for ( ; cdr ; cdr = cdr->next) {
1038                 /* Detach if post is requested */
1039                 if (ast_test_flag(&flags, AST_CDR_FLAG_LOCKED) || !ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
1040                         if (ast_test_flag(&flags, AST_CDR_FLAG_POSTED)) {
1041                                 ast_cdr_end(cdr);
1042                                 if ((duplicate = ast_cdr_dup(cdr))) {
1043                                         ast_cdr_detach(duplicate);
1044                                 }
1045                                 ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
1046                         }
1047
1048                         /* enable CDR only */
1049                         if (ast_test_flag(&flags, AST_CDR_FLAG_POST_ENABLE)) {
1050                                 ast_clear_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1051                                 continue;
1052                         }
1053
1054                         /* clear variables */
1055                         if (!ast_test_flag(&flags, AST_CDR_FLAG_KEEP_VARS)) {
1056                                 ast_cdr_free_vars(cdr, 0);
1057                         }
1058
1059                         /* Reset to initial state */
1060                         ast_clear_flag(cdr, AST_FLAGS_ALL);     
1061                         memset(&cdr->start, 0, sizeof(cdr->start));
1062                         memset(&cdr->end, 0, sizeof(cdr->end));
1063                         memset(&cdr->answer, 0, sizeof(cdr->answer));
1064                         cdr->billsec = 0;
1065                         cdr->duration = 0;
1066                         ast_cdr_start(cdr);
1067                         cdr->disposition = AST_CDR_NULL;
1068                 }
1069         }
1070 }
1071
1072 void ast_cdr_specialized_reset(struct ast_cdr *cdr, struct ast_flags *_flags)
1073 {
1074         struct ast_flags flags = { 0 };
1075
1076         if (_flags)
1077                 ast_copy_flags(&flags, _flags, AST_FLAGS_ALL);
1078         
1079         /* Reset to initial state */
1080         if (ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED)) { /* But do NOT lose the NoCDR() setting */
1081                 ast_clear_flag(cdr, AST_FLAGS_ALL);     
1082                 ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1083         } else {
1084                 ast_clear_flag(cdr, AST_FLAGS_ALL);     
1085         }
1086         
1087         memset(&cdr->start, 0, sizeof(cdr->start));
1088         memset(&cdr->end, 0, sizeof(cdr->end));
1089         memset(&cdr->answer, 0, sizeof(cdr->answer));
1090         cdr->billsec = 0;
1091         cdr->duration = 0;
1092         ast_cdr_start(cdr);
1093         cdr->disposition = AST_CDR_NULL;
1094 }
1095
1096 struct ast_cdr *ast_cdr_append(struct ast_cdr *cdr, struct ast_cdr *newcdr) 
1097 {
1098         struct ast_cdr *ret;
1099
1100         if (cdr) {
1101                 ret = cdr;
1102
1103                 while (cdr->next)
1104                         cdr = cdr->next;
1105                 cdr->next = newcdr;
1106         } else {
1107                 ret = newcdr;
1108         }
1109
1110         return ret;
1111 }
1112
1113 /*! \note Don't call without cdr_batch_lock */
1114 static void reset_batch(void)
1115 {
1116         batch->size = 0;
1117         batch->head = NULL;
1118         batch->tail = NULL;
1119 }
1120
1121 /*! \note Don't call without cdr_batch_lock */
1122 static int init_batch(void)
1123 {
1124         /* This is the single meta-batch used to keep track of all CDRs during the entire life of the program */
1125         if (!(batch = ast_malloc(sizeof(*batch))))
1126                 return -1;
1127
1128         reset_batch();
1129
1130         return 0;
1131 }
1132
1133 static void *do_batch_backend_process(void *data)
1134 {
1135         struct ast_cdr_batch_item *processeditem;
1136         struct ast_cdr_batch_item *batchitem = data;
1137
1138         /* Push each CDR into storage mechanism(s) and free all the memory */
1139         while (batchitem) {
1140                 post_cdr(batchitem->cdr);
1141                 ast_cdr_free(batchitem->cdr);
1142                 processeditem = batchitem;
1143                 batchitem = batchitem->next;
1144                 ast_free(processeditem);
1145         }
1146
1147         return NULL;
1148 }
1149
1150 void ast_cdr_submit_batch(int do_shutdown)
1151 {
1152         struct ast_cdr_batch_item *oldbatchitems = NULL;
1153         pthread_t batch_post_thread = AST_PTHREADT_NULL;
1154
1155         /* if there's no batch, or no CDRs in the batch, then there's nothing to do */
1156         if (!batch || !batch->head)
1157                 return;
1158
1159         /* move the old CDRs aside, and prepare a new CDR batch */
1160         ast_mutex_lock(&cdr_batch_lock);
1161         oldbatchitems = batch->head;
1162         reset_batch();
1163         ast_mutex_unlock(&cdr_batch_lock);
1164
1165         /* if configured, spawn a new thread to post these CDRs,
1166            also try to save as much as possible if we are shutting down safely */
1167         if (batchscheduleronly || do_shutdown) {
1168                 ast_debug(1, "CDR single-threaded batch processing begins now\n");
1169                 do_batch_backend_process(oldbatchitems);
1170         } else {
1171                 if (ast_pthread_create_detached_background(&batch_post_thread, NULL, do_batch_backend_process, oldbatchitems)) {
1172                         ast_log(LOG_WARNING, "CDR processing thread could not detach, now trying in this thread\n");
1173                         do_batch_backend_process(oldbatchitems);
1174                 } else {
1175                         ast_debug(1, "CDR multi-threaded batch processing begins now\n");
1176                 }
1177         }
1178 }
1179
1180 static int submit_scheduled_batch(const void *data)
1181 {
1182         ast_cdr_submit_batch(0);
1183         /* manually reschedule from this point in time */
1184         cdr_sched = ast_sched_add(sched, batchtime * 1000, submit_scheduled_batch, NULL);
1185         /* returning zero so the scheduler does not automatically reschedule */
1186         return 0;
1187 }
1188
1189 static void submit_unscheduled_batch(void)
1190 {
1191         /* this is okay since we are not being called from within the scheduler */
1192         AST_SCHED_DEL(sched, cdr_sched);
1193         /* schedule the submission to occur ASAP (1 ms) */
1194         cdr_sched = ast_sched_add(sched, 1, submit_scheduled_batch, NULL);
1195         /* signal the do_cdr thread to wakeup early and do some work (that lazy thread ;) */
1196         ast_mutex_lock(&cdr_pending_lock);
1197         ast_cond_signal(&cdr_pending_cond);
1198         ast_mutex_unlock(&cdr_pending_lock);
1199 }
1200
1201 void ast_cdr_detach(struct ast_cdr *cdr)
1202 {
1203         struct ast_cdr_batch_item *newtail;
1204         int curr;
1205
1206         if (!cdr)
1207                 return;
1208
1209         /* maybe they disabled CDR stuff completely, so just drop it */
1210         if (!enabled) {
1211                 ast_debug(1, "Dropping CDR !\n");
1212                 ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1213                 ast_cdr_free(cdr);
1214                 return;
1215         }
1216
1217         /* post stuff immediately if we are not in batch mode, this is legacy behaviour */
1218         if (!batchmode) {
1219                 post_cdr(cdr);
1220                 ast_cdr_free(cdr);
1221                 return;
1222         }
1223
1224         /* otherwise, each CDR gets put into a batch list (at the end) */
1225         ast_debug(1, "CDR detaching from this thread\n");
1226
1227         /* we'll need a new tail for every CDR */
1228         if (!(newtail = ast_calloc(1, sizeof(*newtail)))) {
1229                 post_cdr(cdr);
1230                 ast_cdr_free(cdr);
1231                 return;
1232         }
1233
1234         /* don't traverse a whole list (just keep track of the tail) */
1235         ast_mutex_lock(&cdr_batch_lock);
1236         if (!batch)
1237                 init_batch();
1238         if (!batch->head) {
1239                 /* new batch is empty, so point the head at the new tail */
1240                 batch->head = newtail;
1241         } else {
1242                 /* already got a batch with something in it, so just append a new tail */
1243                 batch->tail->next = newtail;
1244         }
1245         newtail->cdr = cdr;
1246         batch->tail = newtail;
1247         curr = batch->size++;
1248         ast_mutex_unlock(&cdr_batch_lock);
1249
1250         /* if we have enough stuff to post, then do it */
1251         if (curr >= (batchsize - 1))
1252                 submit_unscheduled_batch();
1253 }
1254
1255 static void *do_cdr(void *data)
1256 {
1257         struct timespec timeout;
1258         int schedms;
1259         int numevents = 0;
1260
1261         for (;;) {
1262                 struct timeval now;
1263                 schedms = ast_sched_wait(sched);
1264                 /* this shouldn't happen, but provide a 1 second default just in case */
1265                 if (schedms <= 0)
1266                         schedms = 1000;
1267                 now = ast_tvadd(ast_tvnow(), ast_samp2tv(schedms, 1000));
1268                 timeout.tv_sec = now.tv_sec;
1269                 timeout.tv_nsec = now.tv_usec * 1000;
1270                 /* prevent stuff from clobbering cdr_pending_cond, then wait on signals sent to it until the timeout expires */
1271                 ast_mutex_lock(&cdr_pending_lock);
1272                 ast_cond_timedwait(&cdr_pending_cond, &cdr_pending_lock, &timeout);
1273                 numevents = ast_sched_runq(sched);
1274                 ast_mutex_unlock(&cdr_pending_lock);
1275                 ast_debug(2, "Processed %d scheduled CDR batches from the run queue\n", numevents);
1276         }
1277
1278         return NULL;
1279 }
1280
1281 static char *handle_cli_status(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1282 {
1283         struct ast_cdr_beitem *beitem=NULL;
1284         int cnt=0;
1285         long nextbatchtime=0;
1286
1287         switch (cmd) {
1288         case CLI_INIT:
1289                 e->command = "cdr show status";
1290                 e->usage = 
1291                         "Usage: cdr show status\n"
1292                         "       Displays the Call Detail Record engine system status.\n";
1293                 return NULL;
1294         case CLI_GENERATE:
1295                 return NULL;
1296         }
1297
1298         if (a->argc > 3)
1299                 return CLI_SHOWUSAGE;
1300
1301         ast_cli(a->fd, "\n");
1302         ast_cli(a->fd, "Call Detail Record (CDR) settings\n");
1303         ast_cli(a->fd, "----------------------------------\n");
1304         ast_cli(a->fd, "  Logging:                    %s\n", enabled ? "Enabled" : "Disabled");
1305         ast_cli(a->fd, "  Mode:                       %s\n", batchmode ? "Batch" : "Simple");
1306         if (enabled) {
1307                 ast_cli(a->fd, "  Log unanswered calls:       %s\n\n", unanswered ? "Yes" : "No");
1308                 if (batchmode) {
1309                         ast_cli(a->fd, "* Batch Mode Settings\n");
1310                         ast_cli(a->fd, "  -------------------\n");
1311                         if (batch)
1312                                 cnt = batch->size;
1313                         if (cdr_sched > -1)
1314                                 nextbatchtime = ast_sched_when(sched, cdr_sched);
1315                         ast_cli(a->fd, "  Safe shutdown:              %s\n", batchsafeshutdown ? "Enabled" : "Disabled");
1316                         ast_cli(a->fd, "  Threading model:            %s\n", batchscheduleronly ? "Scheduler only" : "Scheduler plus separate threads");
1317                         ast_cli(a->fd, "  Current batch size:         %d record%s\n", cnt, ESS(cnt));
1318                         ast_cli(a->fd, "  Maximum batch size:         %d record%s\n", batchsize, ESS(batchsize));
1319                         ast_cli(a->fd, "  Maximum batch time:         %d second%s\n", batchtime, ESS(batchtime));
1320                         ast_cli(a->fd, "  Next batch processing time: %ld second%s\n\n", nextbatchtime, ESS(nextbatchtime));
1321                 }
1322                 ast_cli(a->fd, "* Registered Backends\n");
1323                 ast_cli(a->fd, "  -------------------\n");
1324                 AST_RWLIST_RDLOCK(&be_list);
1325                 if (AST_RWLIST_EMPTY(&be_list)) {
1326                         ast_cli(a->fd, "    (none)\n");
1327                 } else {
1328                         AST_RWLIST_TRAVERSE(&be_list, beitem, list) {
1329                                 ast_cli(a->fd, "    %s\n", beitem->name);
1330                         }
1331                 }
1332                 AST_RWLIST_UNLOCK(&be_list);
1333                 ast_cli(a->fd, "\n");
1334         }
1335
1336         return CLI_SUCCESS;
1337 }
1338
1339 static char *handle_cli_submit(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1340 {
1341         switch (cmd) {
1342         case CLI_INIT:
1343                 e->command = "cdr submit";
1344                 e->usage = 
1345                         "Usage: cdr submit\n"
1346                         "       Posts all pending batched CDR data to the configured CDR backend engine modules.\n";
1347                 return NULL;
1348         case CLI_GENERATE:
1349                 return NULL;
1350         }
1351         if (a->argc > 2)
1352                 return CLI_SHOWUSAGE;
1353
1354         submit_unscheduled_batch();
1355         ast_cli(a->fd, "Submitted CDRs to backend engines for processing.  This may take a while.\n");
1356
1357         return CLI_SUCCESS;
1358 }
1359
1360 static struct ast_cli_entry cli_submit = AST_CLI_DEFINE(handle_cli_submit, "Posts all pending batched CDR data");
1361 static struct ast_cli_entry cli_status = AST_CLI_DEFINE(handle_cli_status, "Display the CDR status");
1362
1363 static int do_reload(int reload)
1364 {
1365         struct ast_config *config;
1366         const char *enabled_value;
1367         const char *unanswered_value;
1368         const char *batched_value;
1369         const char *scheduleronly_value;
1370         const char *batchsafeshutdown_value;
1371         const char *size_value;
1372         const char *time_value;
1373         const char *end_before_h_value;
1374         const char *initiatedseconds_value;
1375         int cfg_size;
1376         int cfg_time;
1377         int was_enabled;
1378         int was_batchmode;
1379         int res=0;
1380         struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
1381
1382         if ((config = ast_config_load2("cdr.conf", "cdr", config_flags)) == CONFIG_STATUS_FILEUNCHANGED)
1383                 return 0;
1384         if (config == CONFIG_STATUS_FILEMISSING || config == CONFIG_STATUS_FILEUNCHANGED || config == CONFIG_STATUS_FILEINVALID) {
1385                 return 0;
1386         }
1387
1388         ast_mutex_lock(&cdr_batch_lock);
1389
1390         batchsize = BATCH_SIZE_DEFAULT;
1391         batchtime = BATCH_TIME_DEFAULT;
1392         batchscheduleronly = BATCH_SCHEDULER_ONLY_DEFAULT;
1393         batchsafeshutdown = BATCH_SAFE_SHUTDOWN_DEFAULT;
1394         was_enabled = enabled;
1395         was_batchmode = batchmode;
1396         enabled = 1;
1397         batchmode = 0;
1398
1399         /* don't run the next scheduled CDR posting while reloading */
1400         AST_SCHED_DEL(sched, cdr_sched);
1401
1402         if (config) {
1403                 if ((enabled_value = ast_variable_retrieve(config, "general", "enable"))) {
1404                         enabled = ast_true(enabled_value);
1405                 }
1406                 if ((unanswered_value = ast_variable_retrieve(config, "general", "unanswered"))) {
1407                         unanswered = ast_true(unanswered_value);
1408                 }
1409                 if ((batched_value = ast_variable_retrieve(config, "general", "batch"))) {
1410                         batchmode = ast_true(batched_value);
1411                 }
1412                 if ((scheduleronly_value = ast_variable_retrieve(config, "general", "scheduleronly"))) {
1413                         batchscheduleronly = ast_true(scheduleronly_value);
1414                 }
1415                 if ((batchsafeshutdown_value = ast_variable_retrieve(config, "general", "safeshutdown"))) {
1416                         batchsafeshutdown = ast_true(batchsafeshutdown_value);
1417                 }
1418                 if ((size_value = ast_variable_retrieve(config, "general", "size"))) {
1419                         if (sscanf(size_value, "%d", &cfg_size) < 1)
1420                                 ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", size_value);
1421                         else if (cfg_size < 0)
1422                                 ast_log(LOG_WARNING, "Invalid maximum batch size '%d' specified, using default\n", cfg_size);
1423                         else
1424                                 batchsize = cfg_size;
1425                 }
1426                 if ((time_value = ast_variable_retrieve(config, "general", "time"))) {
1427                         if (sscanf(time_value, "%d", &cfg_time) < 1)
1428                                 ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", time_value);
1429                         else if (cfg_time < 0)
1430                                 ast_log(LOG_WARNING, "Invalid maximum batch time '%d' specified, using default\n", cfg_time);
1431                         else
1432                                 batchtime = cfg_time;
1433                 }
1434                 if ((end_before_h_value = ast_variable_retrieve(config, "general", "endbeforehexten")))
1435                         ast_set2_flag(&ast_options, ast_true(end_before_h_value), AST_OPT_FLAG_END_CDR_BEFORE_H_EXTEN);
1436                 if ((initiatedseconds_value = ast_variable_retrieve(config, "general", "initiatedseconds")))
1437                         ast_set2_flag(&ast_options, ast_true(initiatedseconds_value), AST_OPT_FLAG_INITIATED_SECONDS);
1438         }
1439
1440         if (enabled && !batchmode) {
1441                 ast_log(LOG_NOTICE, "CDR simple logging enabled.\n");
1442         } else if (enabled && batchmode) {
1443                 cdr_sched = ast_sched_add(sched, batchtime * 1000, submit_scheduled_batch, NULL);
1444                 ast_log(LOG_NOTICE, "CDR batch mode logging enabled, first of either size %d or time %d seconds.\n", batchsize, batchtime);
1445         } else {
1446                 ast_log(LOG_NOTICE, "CDR logging disabled, data will be lost.\n");
1447         }
1448
1449         /* if this reload enabled the CDR batch mode, create the background thread
1450            if it does not exist */
1451         if (enabled && batchmode && (!was_enabled || !was_batchmode) && (cdr_thread == AST_PTHREADT_NULL)) {
1452                 ast_cond_init(&cdr_pending_cond, NULL);
1453                 if (ast_pthread_create_background(&cdr_thread, NULL, do_cdr, NULL) < 0) {
1454                         ast_log(LOG_ERROR, "Unable to start CDR thread.\n");
1455                         AST_SCHED_DEL(sched, cdr_sched);
1456                 } else {
1457                         ast_cli_register(&cli_submit);
1458                         ast_register_atexit(ast_cdr_engine_term);
1459                         res = 0;
1460                 }
1461         /* if this reload disabled the CDR and/or batch mode and there is a background thread,
1462            kill it */
1463         } else if (((!enabled && was_enabled) || (!batchmode && was_batchmode)) && (cdr_thread != AST_PTHREADT_NULL)) {
1464                 /* wake up the thread so it will exit */
1465                 pthread_cancel(cdr_thread);
1466                 pthread_kill(cdr_thread, SIGURG);
1467                 pthread_join(cdr_thread, NULL);
1468                 cdr_thread = AST_PTHREADT_NULL;
1469                 ast_cond_destroy(&cdr_pending_cond);
1470                 ast_cli_unregister(&cli_submit);
1471                 ast_unregister_atexit(ast_cdr_engine_term);
1472                 res = 0;
1473                 /* if leaving batch mode, then post the CDRs in the batch,
1474                    and don't reschedule, since we are stopping CDR logging */
1475                 if (!batchmode && was_batchmode) {
1476                         ast_cdr_engine_term();
1477                 }
1478         } else {
1479                 res = 0;
1480         }
1481
1482         ast_mutex_unlock(&cdr_batch_lock);
1483         ast_config_destroy(config);
1484         manager_event(EVENT_FLAG_SYSTEM, "Reload", "Module: CDR\r\nMessage: CDR subsystem reload requested\r\n");
1485
1486         return res;
1487 }
1488
1489 int ast_cdr_engine_init(void)
1490 {
1491         int res;
1492
1493         sched = sched_context_create();
1494         if (!sched) {
1495                 ast_log(LOG_ERROR, "Unable to create schedule context.\n");
1496                 return -1;
1497         }
1498
1499         ast_cli_register(&cli_status);
1500
1501         res = do_reload(0);
1502         if (res) {
1503                 ast_mutex_lock(&cdr_batch_lock);
1504                 res = init_batch();
1505                 ast_mutex_unlock(&cdr_batch_lock);
1506         }
1507
1508         return res;
1509 }
1510
1511 /* \note This actually gets called a couple of times at shutdown.  Once, before we start
1512    hanging up channels, and then again, after the channel hangup timeout expires */
1513 void ast_cdr_engine_term(void)
1514 {
1515         ast_cdr_submit_batch(batchsafeshutdown);
1516 }
1517
1518 int ast_cdr_engine_reload(void)
1519 {
1520         return do_reload(1);
1521 }
1522