Merged revisions 159316 via svnmerge from
[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         (*buf)->used = 0;
371         (*buf)->str[0] = '\0';
372
373         for (; cdr; cdr = recur ? cdr->next : NULL) {
374                 if (++x > 1)
375                         ast_str_append(buf, 0, "\n");
376
377                 AST_LIST_TRAVERSE(&cdr->varshead, variables, entries) {
378                         if (variables &&
379                             (var = ast_var_name(variables)) && (val = ast_var_value(variables)) &&
380                             !ast_strlen_zero(var) && !ast_strlen_zero(val)) {
381                                 if (ast_str_append(buf, 0, "level %d: %s%c%s%c", x, var, delim, val, sep) < 0) {
382                                         ast_log(LOG_ERROR, "Data Buffer Size Exceeded!\n");
383                                         break;
384                                 } else
385                                         total++;
386                         } else 
387                                 break;
388                 }
389
390                 for (i = 0; cdr_readonly_vars[i]; i++) {
391                         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 */
392                         ast_cdr_getvar(cdr, cdr_readonly_vars[i], &tmp, workspace, sizeof(workspace), 0, 0);
393                         if (!tmp)
394                                 continue;
395                         
396                         if (ast_str_append(buf, 0, "level %d: %s%c%s%c", x, cdr_readonly_vars[i], delim, tmp, sep) < 0) {
397                                 ast_log(LOG_ERROR, "Data Buffer Size Exceeded!\n");
398                                 break;
399                         } else
400                                 total++;
401                 }
402         }
403
404         return total;
405 }
406
407
408 void ast_cdr_free_vars(struct ast_cdr *cdr, int recur)
409 {
410
411         /* clear variables */
412         for (; cdr; cdr = recur ? cdr->next : NULL) {
413                 struct ast_var_t *vardata;
414                 struct varshead *headp = &cdr->varshead;
415                 while ((vardata = AST_LIST_REMOVE_HEAD(headp, entries)))
416                         ast_var_delete(vardata);
417         }
418 }
419
420 /*! \brief  print a warning if cdr already posted */
421 static void check_post(struct ast_cdr *cdr)
422 {
423         if (!cdr)
424                 return;
425         if (ast_test_flag(cdr, AST_CDR_FLAG_POSTED))
426                 ast_log(LOG_NOTICE, "CDR on channel '%s' already posted\n", S_OR(cdr->channel, "<unknown>"));
427 }
428
429 void ast_cdr_free(struct ast_cdr *cdr)
430 {
431
432         while (cdr) {
433                 struct ast_cdr *next = cdr->next;
434
435                 ast_cdr_free_vars(cdr, 0);
436                 ast_free(cdr);
437                 cdr = next;
438         }
439 }
440
441 /*! \brief the same as a cdr_free call, only with no checks; just get rid of it */
442 void ast_cdr_discard(struct ast_cdr *cdr)
443 {
444         while (cdr) {
445                 struct ast_cdr *next = cdr->next;
446
447                 ast_cdr_free_vars(cdr, 0);
448                 ast_free(cdr);
449                 cdr = next;
450         }
451 }
452
453 struct ast_cdr *ast_cdr_alloc(void)
454 {
455         struct ast_cdr *x;
456         x = ast_calloc(1, sizeof(*x));
457         if (!x)
458                 ast_log(LOG_ERROR,"Allocation Failure for a CDR!\n");
459         return x;
460 }
461
462 static void cdr_merge_vars(struct ast_cdr *to, struct ast_cdr *from)
463 {
464         struct ast_var_t *variablesfrom,*variablesto;
465         struct varshead *headpfrom = &to->varshead;
466         struct varshead *headpto = &from->varshead;
467         AST_LIST_TRAVERSE_SAFE_BEGIN(headpfrom, variablesfrom, entries) {
468                 /* for every var in from, stick it in to */
469                 const char *fromvarname, *fromvarval;
470                 const char *tovarname = NULL, *tovarval = NULL;
471                 fromvarname = ast_var_name(variablesfrom);
472                 fromvarval = ast_var_value(variablesfrom);
473                 tovarname = 0;
474
475                 /* now, quick see if that var is in the 'to' cdr already */
476                 AST_LIST_TRAVERSE(headpto, variablesto, entries) {
477
478                         /* now, quick see if that var is in the 'to' cdr already */
479                         if ( strcasecmp(fromvarname, ast_var_name(variablesto)) == 0 ) {
480                                 tovarname = ast_var_name(variablesto);
481                                 tovarval = ast_var_value(variablesto);
482                                 break;
483                         }
484                 }
485                 if (tovarname && strcasecmp(fromvarval,tovarval) != 0) {  /* this message here to see how irritating the userbase finds it */
486                         ast_log(LOG_NOTICE, "Merging CDR's: variable %s value %s dropped in favor of value %s\n", tovarname, fromvarval, tovarval);
487                         continue;
488                 } else if (tovarname && strcasecmp(fromvarval,tovarval) == 0) /* if they are the same, the job is done */
489                         continue;
490
491                 /* rip this var out of the from cdr, and stick it in the to cdr */
492                 AST_LIST_MOVE_CURRENT(headpto, entries);
493         }
494         AST_LIST_TRAVERSE_SAFE_END;
495 }
496
497 void ast_cdr_merge(struct ast_cdr *to, struct ast_cdr *from)
498 {
499         struct ast_cdr *zcdr;
500         struct ast_cdr *lto = NULL;
501         struct ast_cdr *lfrom = NULL;
502         int discard_from = 0;
503         
504         if (!to || !from)
505                 return;
506
507         /* don't merge into locked CDR's -- it's bad business */
508         if (ast_test_flag(to, AST_CDR_FLAG_LOCKED)) {
509                 zcdr = to; /* safety valve? */
510                 while (to->next) {
511                         lto = to;
512                         to = to->next;
513                 }
514                 
515                 if (ast_test_flag(to, AST_CDR_FLAG_LOCKED)) {
516                         ast_log(LOG_WARNING, "Merging into locked CDR... no choice.");
517                         to = zcdr; /* safety-- if all there are is locked CDR's, then.... ?? */
518                         lto = NULL;
519                 }
520         }
521
522         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED)) {
523                 struct ast_cdr *llfrom = NULL;
524                 discard_from = 1;
525                 if (lto) {
526                         /* insert the from stuff after lto */
527                         lto->next = from;
528                         lfrom = from;
529                         while (lfrom && lfrom->next) {
530                                 if (!lfrom->next->next)
531                                         llfrom = lfrom;
532                                 lfrom = lfrom->next; 
533                         }
534                         /* rip off the last entry and put a copy of the to at the end */
535                         llfrom->next = to;
536                         from = lfrom;
537                 } else {
538                         /* save copy of the current *to cdr */
539                         struct ast_cdr tcdr;
540                         memcpy(&tcdr, to, sizeof(tcdr));
541                         /* copy in the locked from cdr */
542                         memcpy(to, from, sizeof(*to));
543                         lfrom = from;
544                         while (lfrom && lfrom->next) {
545                                 if (!lfrom->next->next)
546                                         llfrom = lfrom;
547                                 lfrom = lfrom->next; 
548                         }
549                         from->next = NULL;
550                         /* rip off the last entry and put a copy of the to at the end */
551                         if (llfrom == from)
552                                 to = to->next = ast_cdr_dup(&tcdr);
553                         else
554                                 to = llfrom->next = ast_cdr_dup(&tcdr);
555                         from = lfrom;
556                 }
557         }
558         
559         if (!ast_tvzero(from->start)) {
560                 if (!ast_tvzero(to->start)) {
561                         if (ast_tvcmp(to->start, from->start) > 0 ) {
562                                 to->start = from->start; /* use the earliest time */
563                                 from->start = ast_tv(0,0); /* we actively "steal" these values */
564                         }
565                         /* else nothing to do */
566                 } else {
567                         to->start = from->start;
568                         from->start = ast_tv(0,0); /* we actively "steal" these values */
569                 }
570         }
571         if (!ast_tvzero(from->answer)) {
572                 if (!ast_tvzero(to->answer)) {
573                         if (ast_tvcmp(to->answer, from->answer) > 0 ) {
574                                 to->answer = from->answer; /* use the earliest time */
575                                 from->answer = ast_tv(0,0); /* we actively "steal" these values */
576                         }
577                         /* we got the earliest answer time, so we'll settle for that? */
578                 } else {
579                         to->answer = from->answer;
580                         from->answer = ast_tv(0,0); /* we actively "steal" these values */
581                 }
582         }
583         if (!ast_tvzero(from->end)) {
584                 if (!ast_tvzero(to->end)) {
585                         if (ast_tvcmp(to->end, from->end) < 0 ) {
586                                 to->end = from->end; /* use the latest time */
587                                 from->end = ast_tv(0,0); /* we actively "steal" these values */
588                                 to->duration = to->end.tv_sec - to->start.tv_sec;  /* don't forget to update the duration, billsec, when we set end */
589                                 to->billsec = ast_tvzero(to->answer) ? 0 : to->end.tv_sec - to->answer.tv_sec;
590                         }
591                         /* else, nothing to do */
592                 } else {
593                         to->end = from->end;
594                         from->end = ast_tv(0,0); /* we actively "steal" these values */
595                         to->duration = to->end.tv_sec - to->start.tv_sec;
596                         to->billsec = ast_tvzero(to->answer) ? 0 : to->end.tv_sec - to->answer.tv_sec;
597                 }
598         }
599         if (to->disposition < from->disposition) {
600                 to->disposition = from->disposition;
601                 from->disposition = AST_CDR_NOANSWER;
602         }
603         if (ast_strlen_zero(to->lastapp) && !ast_strlen_zero(from->lastapp)) {
604                 ast_copy_string(to->lastapp, from->lastapp, sizeof(to->lastapp));
605                 from->lastapp[0] = 0; /* theft */
606         }
607         if (ast_strlen_zero(to->lastdata) && !ast_strlen_zero(from->lastdata)) {
608                 ast_copy_string(to->lastdata, from->lastdata, sizeof(to->lastdata));
609                 from->lastdata[0] = 0; /* theft */
610         }
611         if (ast_strlen_zero(to->dcontext) && !ast_strlen_zero(from->dcontext)) {
612                 ast_copy_string(to->dcontext, from->dcontext, sizeof(to->dcontext));
613                 from->dcontext[0] = 0; /* theft */
614         }
615         if (ast_strlen_zero(to->dstchannel) && !ast_strlen_zero(from->dstchannel)) {
616                 ast_copy_string(to->dstchannel, from->dstchannel, sizeof(to->dstchannel));
617                 from->dstchannel[0] = 0; /* theft */
618         }
619         if (!ast_strlen_zero(from->channel) && (ast_strlen_zero(to->channel) || !strncasecmp(from->channel, "Agent/", 6))) {
620                 ast_copy_string(to->channel, from->channel, sizeof(to->channel));
621                 from->channel[0] = 0; /* theft */
622         }
623         if (ast_strlen_zero(to->src) && !ast_strlen_zero(from->src)) {
624                 ast_copy_string(to->src, from->src, sizeof(to->src));
625                 from->src[0] = 0; /* theft */
626         }
627         if (ast_strlen_zero(to->clid) && !ast_strlen_zero(from->clid)) {
628                 ast_copy_string(to->clid, from->clid, sizeof(to->clid));
629                 from->clid[0] = 0; /* theft */
630         }
631         if (ast_strlen_zero(to->dst) && !ast_strlen_zero(from->dst)) {
632                 ast_copy_string(to->dst, from->dst, sizeof(to->dst));
633                 from->dst[0] = 0; /* theft */
634         }
635         if (!to->amaflags)
636                 to->amaflags = AST_CDR_DOCUMENTATION;
637         if (!from->amaflags)
638                 from->amaflags = AST_CDR_DOCUMENTATION; /* make sure both amaflags are set to something (DOC is default) */
639         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (to->amaflags == AST_CDR_DOCUMENTATION && from->amaflags != AST_CDR_DOCUMENTATION)) {
640                 to->amaflags = from->amaflags;
641         }
642         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->accountcode) && !ast_strlen_zero(from->accountcode))) {
643                 ast_copy_string(to->accountcode, from->accountcode, sizeof(to->accountcode));
644         }
645         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->userfield) && !ast_strlen_zero(from->userfield))) {
646                 ast_copy_string(to->userfield, from->userfield, sizeof(to->userfield));
647         }
648         /* flags, varsead, ? */
649         cdr_merge_vars(from, to);
650
651         if (ast_test_flag(from, AST_CDR_FLAG_KEEP_VARS))
652                 ast_set_flag(to, AST_CDR_FLAG_KEEP_VARS);
653         if (ast_test_flag(from, AST_CDR_FLAG_POSTED))
654                 ast_set_flag(to, AST_CDR_FLAG_POSTED);
655         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED))
656                 ast_set_flag(to, AST_CDR_FLAG_LOCKED);
657         if (ast_test_flag(from, AST_CDR_FLAG_CHILD))
658                 ast_set_flag(to, AST_CDR_FLAG_CHILD);
659         if (ast_test_flag(from, AST_CDR_FLAG_POST_DISABLED))
660                 ast_set_flag(to, AST_CDR_FLAG_POST_DISABLED);
661
662         /* last, but not least, we need to merge any forked CDRs to the 'to' cdr */
663         while (from->next) {
664                 /* just rip 'em off the 'from' and insert them on the 'to' */
665                 zcdr = from->next;
666                 from->next = zcdr->next;
667                 zcdr->next = NULL;
668                 /* zcdr is now ripped from the current list; */
669                 ast_cdr_append(to, zcdr);
670         }
671         if (discard_from)
672                 ast_cdr_discard(from);
673 }
674
675 void ast_cdr_start(struct ast_cdr *cdr)
676 {
677         char *chan; 
678
679         for (; cdr; cdr = cdr->next) {
680                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
681                         chan = S_OR(cdr->channel, "<unknown>");
682                         check_post(cdr);
683                         cdr->start = ast_tvnow();
684                 }
685         }
686 }
687
688 void ast_cdr_answer(struct ast_cdr *cdr)
689 {
690
691         for (; cdr; cdr = cdr->next) {
692                 if (ast_test_flag(cdr, AST_CDR_FLAG_ANSLOCKED)) 
693                         continue;
694                 if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
695                         continue;
696                 check_post(cdr);
697                 if (cdr->disposition < AST_CDR_ANSWERED)
698                         cdr->disposition = AST_CDR_ANSWERED;
699                 if (ast_tvzero(cdr->answer))
700                         cdr->answer = ast_tvnow();
701         }
702 }
703
704 void ast_cdr_busy(struct ast_cdr *cdr)
705 {
706
707         for (; cdr; cdr = cdr->next) {
708                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
709                         check_post(cdr);
710                         if (cdr->disposition < AST_CDR_BUSY)
711                                 cdr->disposition = AST_CDR_BUSY;
712                 }
713         }
714 }
715
716 void ast_cdr_failed(struct ast_cdr *cdr)
717 {
718         for (; cdr; cdr = cdr->next) {
719                 check_post(cdr);
720                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
721                         check_post(cdr);
722                         if (cdr->disposition < AST_CDR_FAILED)
723                                 cdr->disposition = AST_CDR_FAILED;
724                 }
725         }
726 }
727
728 void ast_cdr_noanswer(struct ast_cdr *cdr)
729 {
730         char *chan; 
731
732         while (cdr) {
733                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
734                         chan = !ast_strlen_zero(cdr->channel) ? cdr->channel : "<unknown>";
735                         if (ast_test_flag(cdr, AST_CDR_FLAG_POSTED))
736                                 ast_log(LOG_WARNING, "CDR on channel '%s' already posted\n", chan);
737                         if (cdr->disposition < AST_CDR_NOANSWER)
738                                 cdr->disposition = AST_CDR_NOANSWER;
739                 }
740                 cdr = cdr->next;
741         }
742 }
743
744 /* everywhere ast_cdr_disposition is called, it will call ast_cdr_failed() 
745    if ast_cdr_disposition returns a non-zero value */
746
747 int ast_cdr_disposition(struct ast_cdr *cdr, int cause)
748 {
749         int res = 0;
750
751         for (; cdr; cdr = cdr->next) {
752                 switch (cause) {  /* handle all the non failure, busy cases, return 0 not to set disposition,
753                                                         return -1 to set disposition to FAILED */
754                 case AST_CAUSE_BUSY:
755                         ast_cdr_busy(cdr);
756                         break;
757                 case AST_CAUSE_NO_ANSWER:
758                         ast_cdr_noanswer(cdr);
759                         break;
760                 case AST_CAUSE_NORMAL:
761                         break;
762                 default:
763                         res = -1;
764                 }
765         }
766         return res;
767 }
768
769 void ast_cdr_setdestchan(struct ast_cdr *cdr, const char *chann)
770 {
771         for (; cdr; cdr = cdr->next) {
772                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
773                         check_post(cdr);
774                         ast_copy_string(cdr->dstchannel, chann, sizeof(cdr->dstchannel));
775                 }
776         }
777 }
778
779 void ast_cdr_setapp(struct ast_cdr *cdr, char *app, char *data)
780 {
781
782         for (; cdr; cdr = cdr->next) {
783                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
784                         check_post(cdr);
785                         ast_copy_string(cdr->lastapp, S_OR(app, ""), sizeof(cdr->lastapp));
786                         ast_copy_string(cdr->lastdata, S_OR(data, ""), sizeof(cdr->lastdata));
787                 }
788         }
789 }
790
791 /* set cid info for one record */
792 static void set_one_cid(struct ast_cdr *cdr, struct ast_channel *c)
793 {
794         /* Grab source from ANI or normal Caller*ID */
795         const char *num = S_OR(c->cid.cid_ani, c->cid.cid_num);
796         if (!cdr)
797                 return;
798         if (!ast_strlen_zero(c->cid.cid_name)) {
799                 if (!ast_strlen_zero(num))      /* both name and number */
800                         snprintf(cdr->clid, sizeof(cdr->clid), "\"%s\" <%s>", c->cid.cid_name, num);
801                 else                            /* only name */
802                         ast_copy_string(cdr->clid, c->cid.cid_name, sizeof(cdr->clid));
803         } else if (!ast_strlen_zero(num)) {     /* only number */
804                 ast_copy_string(cdr->clid, num, sizeof(cdr->clid));
805         } else {                                /* nothing known */
806                 cdr->clid[0] = '\0';
807         }
808         ast_copy_string(cdr->src, S_OR(num, ""), sizeof(cdr->src));
809
810 }
811 int ast_cdr_setcid(struct ast_cdr *cdr, struct ast_channel *c)
812 {
813         for (; cdr; cdr = cdr->next) {
814                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
815                         set_one_cid(cdr, c);
816         }
817         return 0;
818 }
819
820 int ast_cdr_init(struct ast_cdr *cdr, struct ast_channel *c)
821 {
822         char *chan;
823
824         for ( ; cdr ; cdr = cdr->next) {
825                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
826                         chan = S_OR(cdr->channel, "<unknown>");
827                         ast_copy_string(cdr->channel, c->name, sizeof(cdr->channel));
828                         set_one_cid(cdr, c);
829
830                         cdr->disposition = (c->_state == AST_STATE_UP) ?  AST_CDR_ANSWERED : AST_CDR_NULL;
831                         cdr->amaflags = c->amaflags ? c->amaflags :  ast_default_amaflags;
832                         ast_copy_string(cdr->accountcode, c->accountcode, sizeof(cdr->accountcode));
833                         /* Destination information */
834                         ast_copy_string(cdr->dst, S_OR(c->macroexten,c->exten), sizeof(cdr->dst));
835                         ast_copy_string(cdr->dcontext, S_OR(c->macrocontext,c->context), sizeof(cdr->dcontext));
836                         /* Unique call identifier */
837                         ast_copy_string(cdr->uniqueid, c->uniqueid, sizeof(cdr->uniqueid));
838                 }
839         }
840         return 0;
841 }
842
843 /* Three routines were "fixed" via 10668, and later shown that 
844    users were depending on this behavior. ast_cdr_end,
845    ast_cdr_setvar and ast_cdr_answer are the three routines.
846    While most of the other routines would not touch 
847    LOCKED cdr's, these three routines were designed to
848    operate on locked CDR's as a matter of course.
849    I now appreciate how this plays with the ForkCDR app,
850    which forms these cdr chains in the first place. 
851    cdr_end is pretty key: all cdrs created are closed
852    together. They only vary by start time. Arithmetically,
853    users can calculate the subintervals they wish to track. */
854
855 void ast_cdr_end(struct ast_cdr *cdr)
856 {
857         for ( ; cdr ; cdr = cdr->next) {
858                 if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
859                         continue;
860                 check_post(cdr);
861                 if (ast_tvzero(cdr->end))
862                         cdr->end = ast_tvnow();
863                 if (ast_tvzero(cdr->start)) {
864                         ast_log(LOG_WARNING, "CDR on channel '%s' has not started\n", S_OR(cdr->channel, "<unknown>"));
865                         cdr->disposition = AST_CDR_FAILED;
866                 } else
867                         cdr->duration = cdr->end.tv_sec - cdr->start.tv_sec;
868                 if (ast_tvzero(cdr->answer)) {
869                         if (cdr->disposition == AST_CDR_ANSWERED) {
870                                 ast_log(LOG_WARNING, "CDR on channel '%s' has no answer time but is 'ANSWERED'\n", S_OR(cdr->channel, "<unknown>"));
871                                 cdr->disposition = AST_CDR_FAILED;
872                         }
873                 } else {
874                         cdr->billsec = cdr->end.tv_sec - cdr->answer.tv_sec;
875                         if (ast_test_flag(&ast_options, AST_OPT_FLAG_INITIATED_SECONDS))
876                                 cdr->billsec += cdr->end.tv_usec > cdr->answer.tv_usec ? 1 : 0;
877                 }
878         }
879 }
880
881 char *ast_cdr_disp2str(int disposition)
882 {
883         switch (disposition) {
884         case AST_CDR_NULL:
885                 return "NO ANSWER"; /* by default, for backward compatibility */
886         case AST_CDR_NOANSWER:
887                 return "NO ANSWER";
888         case AST_CDR_FAILED:
889                 return "FAILED";                
890         case AST_CDR_BUSY:
891                 return "BUSY";          
892         case AST_CDR_ANSWERED:
893                 return "ANSWERED";
894         }
895         return "UNKNOWN";
896 }
897
898 /*! Converts AMA flag to printable string */
899 char *ast_cdr_flags2str(int flag)
900 {
901         switch (flag) {
902         case AST_CDR_OMIT:
903                 return "OMIT";
904         case AST_CDR_BILLING:
905                 return "BILLING";
906         case AST_CDR_DOCUMENTATION:
907                 return "DOCUMENTATION";
908         }
909         return "Unknown";
910 }
911
912 int ast_cdr_setaccount(struct ast_channel *chan, const char *account)
913 {
914         struct ast_cdr *cdr = chan->cdr;
915         char buf[BUFSIZ/2] = "";
916         if (!ast_strlen_zero(chan->accountcode))
917                 ast_copy_string(buf, chan->accountcode, sizeof(buf));
918
919         ast_string_field_set(chan, accountcode, account);
920         for ( ; cdr ; cdr = cdr->next) {
921                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
922                         ast_copy_string(cdr->accountcode, chan->accountcode, sizeof(cdr->accountcode));
923                 }
924         }
925
926         /* Signal change of account code to manager */
927         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);
928         return 0;
929 }
930
931 int ast_cdr_setamaflags(struct ast_channel *chan, const char *flag)
932 {
933         struct ast_cdr *cdr;
934         int newflag = ast_cdr_amaflags2int(flag);
935         if (newflag) {
936                 for (cdr = chan->cdr; cdr; cdr = cdr->next) {
937                         if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
938                                 cdr->amaflags = newflag;
939                         }
940                 }
941         }
942
943         return 0;
944 }
945
946 int ast_cdr_setuserfield(struct ast_channel *chan, const char *userfield)
947 {
948         struct ast_cdr *cdr = chan->cdr;
949
950         for ( ; cdr ; cdr = cdr->next) {
951                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) 
952                         ast_copy_string(cdr->userfield, userfield, sizeof(cdr->userfield));
953         }
954
955         return 0;
956 }
957
958 int ast_cdr_appenduserfield(struct ast_channel *chan, const char *userfield)
959 {
960         struct ast_cdr *cdr = chan->cdr;
961
962         for ( ; cdr ; cdr = cdr->next) {
963                 int len = strlen(cdr->userfield);
964
965                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
966                         ast_copy_string(cdr->userfield + len, userfield, sizeof(cdr->userfield) - len);
967         }
968
969         return 0;
970 }
971
972 int ast_cdr_update(struct ast_channel *c)
973 {
974         struct ast_cdr *cdr = c->cdr;
975
976         for ( ; cdr ; cdr = cdr->next) {
977                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
978                         set_one_cid(cdr, c);
979
980                         /* Copy account code et-al */   
981                         ast_copy_string(cdr->accountcode, c->accountcode, sizeof(cdr->accountcode));
982                         
983                         /* Destination information */ /* XXX privilege macro* ? */
984                         ast_copy_string(cdr->dst, S_OR(c->macroexten, c->exten), sizeof(cdr->dst));
985                         ast_copy_string(cdr->dcontext, S_OR(c->macrocontext, c->context), sizeof(cdr->dcontext));
986                 }
987         }
988
989         return 0;
990 }
991
992 int ast_cdr_amaflags2int(const char *flag)
993 {
994         if (!strcasecmp(flag, "default"))
995                 return 0;
996         if (!strcasecmp(flag, "omit"))
997                 return AST_CDR_OMIT;
998         if (!strcasecmp(flag, "billing"))
999                 return AST_CDR_BILLING;
1000         if (!strcasecmp(flag, "documentation"))
1001                 return AST_CDR_DOCUMENTATION;
1002         return -1;
1003 }
1004
1005 static void post_cdr(struct ast_cdr *cdr)
1006 {
1007         char *chan;
1008         struct ast_cdr_beitem *i;
1009
1010         for ( ; cdr ; cdr = cdr->next) {
1011                 if (!unanswered && cdr->disposition < AST_CDR_ANSWERED && (ast_strlen_zero(cdr->channel) || ast_strlen_zero(cdr->dstchannel))) {
1012                         /* For people, who don't want to see unanswered single-channel events */
1013                         ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1014                         continue;
1015                 }
1016
1017                 chan = S_OR(cdr->channel, "<unknown>");
1018                 check_post(cdr);
1019                 ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
1020                 if (ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED))
1021                         continue;
1022                 AST_RWLIST_RDLOCK(&be_list);
1023                 AST_RWLIST_TRAVERSE(&be_list, i, list) {
1024                         i->be(cdr);
1025                 }
1026                 AST_RWLIST_UNLOCK(&be_list);
1027         }
1028 }
1029
1030 void ast_cdr_reset(struct ast_cdr *cdr, struct ast_flags *_flags)
1031 {
1032         struct ast_cdr *duplicate;
1033         struct ast_flags flags = { 0 };
1034
1035         if (_flags)
1036                 ast_copy_flags(&flags, _flags, AST_FLAGS_ALL);
1037
1038         for ( ; cdr ; cdr = cdr->next) {
1039                 /* Detach if post is requested */
1040                 if (ast_test_flag(&flags, AST_CDR_FLAG_LOCKED) || !ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
1041                         if (ast_test_flag(&flags, AST_CDR_FLAG_POSTED)) {
1042                                 ast_cdr_end(cdr);
1043                                 if ((duplicate = ast_cdr_dup(cdr))) {
1044                                         ast_cdr_detach(duplicate);
1045                                 }
1046                                 ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
1047                         }
1048
1049                         /* enable CDR only */
1050                         if (ast_test_flag(&flags, AST_CDR_FLAG_POST_ENABLE)) {
1051                                 ast_clear_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1052                                 continue;
1053                         }
1054
1055                         /* clear variables */
1056                         if (!ast_test_flag(&flags, AST_CDR_FLAG_KEEP_VARS)) {
1057                                 ast_cdr_free_vars(cdr, 0);
1058                         }
1059
1060                         /* Reset to initial state */
1061                         ast_clear_flag(cdr, AST_FLAGS_ALL);     
1062                         memset(&cdr->start, 0, sizeof(cdr->start));
1063                         memset(&cdr->end, 0, sizeof(cdr->end));
1064                         memset(&cdr->answer, 0, sizeof(cdr->answer));
1065                         cdr->billsec = 0;
1066                         cdr->duration = 0;
1067                         ast_cdr_start(cdr);
1068                         cdr->disposition = AST_CDR_NULL;
1069                 }
1070         }
1071 }
1072
1073 void ast_cdr_specialized_reset(struct ast_cdr *cdr, struct ast_flags *_flags)
1074 {
1075         struct ast_flags flags = { 0 };
1076
1077         if (_flags)
1078                 ast_copy_flags(&flags, _flags, AST_FLAGS_ALL);
1079         
1080         /* Reset to initial state */
1081         if (ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED)) { /* But do NOT lose the NoCDR() setting */
1082                 ast_clear_flag(cdr, AST_FLAGS_ALL);     
1083                 ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1084         } else {
1085                 ast_clear_flag(cdr, AST_FLAGS_ALL);     
1086         }
1087         
1088         memset(&cdr->start, 0, sizeof(cdr->start));
1089         memset(&cdr->end, 0, sizeof(cdr->end));
1090         memset(&cdr->answer, 0, sizeof(cdr->answer));
1091         cdr->billsec = 0;
1092         cdr->duration = 0;
1093         ast_cdr_start(cdr);
1094         cdr->disposition = AST_CDR_NULL;
1095 }
1096
1097 struct ast_cdr *ast_cdr_append(struct ast_cdr *cdr, struct ast_cdr *newcdr) 
1098 {
1099         struct ast_cdr *ret;
1100
1101         if (cdr) {
1102                 ret = cdr;
1103
1104                 while (cdr->next)
1105                         cdr = cdr->next;
1106                 cdr->next = newcdr;
1107         } else {
1108                 ret = newcdr;
1109         }
1110
1111         return ret;
1112 }
1113
1114 /*! \note Don't call without cdr_batch_lock */
1115 static void reset_batch(void)
1116 {
1117         batch->size = 0;
1118         batch->head = NULL;
1119         batch->tail = NULL;
1120 }
1121
1122 /*! \note Don't call without cdr_batch_lock */
1123 static int init_batch(void)
1124 {
1125         /* This is the single meta-batch used to keep track of all CDRs during the entire life of the program */
1126         if (!(batch = ast_malloc(sizeof(*batch))))
1127                 return -1;
1128
1129         reset_batch();
1130
1131         return 0;
1132 }
1133
1134 static void *do_batch_backend_process(void *data)
1135 {
1136         struct ast_cdr_batch_item *processeditem;
1137         struct ast_cdr_batch_item *batchitem = data;
1138
1139         /* Push each CDR into storage mechanism(s) and free all the memory */
1140         while (batchitem) {
1141                 post_cdr(batchitem->cdr);
1142                 ast_cdr_free(batchitem->cdr);
1143                 processeditem = batchitem;
1144                 batchitem = batchitem->next;
1145                 ast_free(processeditem);
1146         }
1147
1148         return NULL;
1149 }
1150
1151 void ast_cdr_submit_batch(int do_shutdown)
1152 {
1153         struct ast_cdr_batch_item *oldbatchitems = NULL;
1154         pthread_t batch_post_thread = AST_PTHREADT_NULL;
1155
1156         /* if there's no batch, or no CDRs in the batch, then there's nothing to do */
1157         if (!batch || !batch->head)
1158                 return;
1159
1160         /* move the old CDRs aside, and prepare a new CDR batch */
1161         ast_mutex_lock(&cdr_batch_lock);
1162         oldbatchitems = batch->head;
1163         reset_batch();
1164         ast_mutex_unlock(&cdr_batch_lock);
1165
1166         /* if configured, spawn a new thread to post these CDRs,
1167            also try to save as much as possible if we are shutting down safely */
1168         if (batchscheduleronly || do_shutdown) {
1169                 ast_debug(1, "CDR single-threaded batch processing begins now\n");
1170                 do_batch_backend_process(oldbatchitems);
1171         } else {
1172                 if (ast_pthread_create_detached_background(&batch_post_thread, NULL, do_batch_backend_process, oldbatchitems)) {
1173                         ast_log(LOG_WARNING, "CDR processing thread could not detach, now trying in this thread\n");
1174                         do_batch_backend_process(oldbatchitems);
1175                 } else {
1176                         ast_debug(1, "CDR multi-threaded batch processing begins now\n");
1177                 }
1178         }
1179 }
1180
1181 static int submit_scheduled_batch(const void *data)
1182 {
1183         ast_cdr_submit_batch(0);
1184         /* manually reschedule from this point in time */
1185         cdr_sched = ast_sched_add(sched, batchtime * 1000, submit_scheduled_batch, NULL);
1186         /* returning zero so the scheduler does not automatically reschedule */
1187         return 0;
1188 }
1189
1190 static void submit_unscheduled_batch(void)
1191 {
1192         /* this is okay since we are not being called from within the scheduler */
1193         AST_SCHED_DEL(sched, cdr_sched);
1194         /* schedule the submission to occur ASAP (1 ms) */
1195         cdr_sched = ast_sched_add(sched, 1, submit_scheduled_batch, NULL);
1196         /* signal the do_cdr thread to wakeup early and do some work (that lazy thread ;) */
1197         ast_mutex_lock(&cdr_pending_lock);
1198         ast_cond_signal(&cdr_pending_cond);
1199         ast_mutex_unlock(&cdr_pending_lock);
1200 }
1201
1202 void ast_cdr_detach(struct ast_cdr *cdr)
1203 {
1204         struct ast_cdr_batch_item *newtail;
1205         int curr;
1206
1207         if (!cdr)
1208                 return;
1209
1210         /* maybe they disabled CDR stuff completely, so just drop it */
1211         if (!enabled) {
1212                 ast_debug(1, "Dropping CDR !\n");
1213                 ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1214                 ast_cdr_free(cdr);
1215                 return;
1216         }
1217
1218         /* post stuff immediately if we are not in batch mode, this is legacy behaviour */
1219         if (!batchmode) {
1220                 post_cdr(cdr);
1221                 ast_cdr_free(cdr);
1222                 return;
1223         }
1224
1225         /* otherwise, each CDR gets put into a batch list (at the end) */
1226         ast_debug(1, "CDR detaching from this thread\n");
1227
1228         /* we'll need a new tail for every CDR */
1229         if (!(newtail = ast_calloc(1, sizeof(*newtail)))) {
1230                 post_cdr(cdr);
1231                 ast_cdr_free(cdr);
1232                 return;
1233         }
1234
1235         /* don't traverse a whole list (just keep track of the tail) */
1236         ast_mutex_lock(&cdr_batch_lock);
1237         if (!batch)
1238                 init_batch();
1239         if (!batch->head) {
1240                 /* new batch is empty, so point the head at the new tail */
1241                 batch->head = newtail;
1242         } else {
1243                 /* already got a batch with something in it, so just append a new tail */
1244                 batch->tail->next = newtail;
1245         }
1246         newtail->cdr = cdr;
1247         batch->tail = newtail;
1248         curr = batch->size++;
1249         ast_mutex_unlock(&cdr_batch_lock);
1250
1251         /* if we have enough stuff to post, then do it */
1252         if (curr >= (batchsize - 1))
1253                 submit_unscheduled_batch();
1254 }
1255
1256 static void *do_cdr(void *data)
1257 {
1258         struct timespec timeout;
1259         int schedms;
1260         int numevents = 0;
1261
1262         for (;;) {
1263                 struct timeval now;
1264                 schedms = ast_sched_wait(sched);
1265                 /* this shouldn't happen, but provide a 1 second default just in case */
1266                 if (schedms <= 0)
1267                         schedms = 1000;
1268                 now = ast_tvadd(ast_tvnow(), ast_samp2tv(schedms, 1000));
1269                 timeout.tv_sec = now.tv_sec;
1270                 timeout.tv_nsec = now.tv_usec * 1000;
1271                 /* prevent stuff from clobbering cdr_pending_cond, then wait on signals sent to it until the timeout expires */
1272                 ast_mutex_lock(&cdr_pending_lock);
1273                 ast_cond_timedwait(&cdr_pending_cond, &cdr_pending_lock, &timeout);
1274                 numevents = ast_sched_runq(sched);
1275                 ast_mutex_unlock(&cdr_pending_lock);
1276                 ast_debug(2, "Processed %d scheduled CDR batches from the run queue\n", numevents);
1277         }
1278
1279         return NULL;
1280 }
1281
1282 static char *handle_cli_status(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1283 {
1284         struct ast_cdr_beitem *beitem=NULL;
1285         int cnt=0;
1286         long nextbatchtime=0;
1287
1288         switch (cmd) {
1289         case CLI_INIT:
1290                 e->command = "cdr show status";
1291                 e->usage = 
1292                         "Usage: cdr show status\n"
1293                         "       Displays the Call Detail Record engine system status.\n";
1294                 return NULL;
1295         case CLI_GENERATE:
1296                 return NULL;
1297         }
1298
1299         if (a->argc > 3)
1300                 return CLI_SHOWUSAGE;
1301
1302         ast_cli(a->fd, "\n");
1303         ast_cli(a->fd, "Call Detail Record (CDR) settings\n");
1304         ast_cli(a->fd, "----------------------------------\n");
1305         ast_cli(a->fd, "  Logging:                    %s\n", enabled ? "Enabled" : "Disabled");
1306         ast_cli(a->fd, "  Mode:                       %s\n", batchmode ? "Batch" : "Simple");
1307         if (enabled) {
1308                 ast_cli(a->fd, "  Log unanswered calls:       %s\n\n", unanswered ? "Yes" : "No");
1309                 if (batchmode) {
1310                         ast_cli(a->fd, "* Batch Mode Settings\n");
1311                         ast_cli(a->fd, "  -------------------\n");
1312                         if (batch)
1313                                 cnt = batch->size;
1314                         if (cdr_sched > -1)
1315                                 nextbatchtime = ast_sched_when(sched, cdr_sched);
1316                         ast_cli(a->fd, "  Safe shutdown:              %s\n", batchsafeshutdown ? "Enabled" : "Disabled");
1317                         ast_cli(a->fd, "  Threading model:            %s\n", batchscheduleronly ? "Scheduler only" : "Scheduler plus separate threads");
1318                         ast_cli(a->fd, "  Current batch size:         %d record%s\n", cnt, ESS(cnt));
1319                         ast_cli(a->fd, "  Maximum batch size:         %d record%s\n", batchsize, ESS(batchsize));
1320                         ast_cli(a->fd, "  Maximum batch time:         %d second%s\n", batchtime, ESS(batchtime));
1321                         ast_cli(a->fd, "  Next batch processing time: %ld second%s\n\n", nextbatchtime, ESS(nextbatchtime));
1322                 }
1323                 ast_cli(a->fd, "* Registered Backends\n");
1324                 ast_cli(a->fd, "  -------------------\n");
1325                 AST_RWLIST_RDLOCK(&be_list);
1326                 if (AST_RWLIST_EMPTY(&be_list)) {
1327                         ast_cli(a->fd, "    (none)\n");
1328                 } else {
1329                         AST_RWLIST_TRAVERSE(&be_list, beitem, list) {
1330                                 ast_cli(a->fd, "    %s\n", beitem->name);
1331                         }
1332                 }
1333                 AST_RWLIST_UNLOCK(&be_list);
1334                 ast_cli(a->fd, "\n");
1335         }
1336
1337         return CLI_SUCCESS;
1338 }
1339
1340 static char *handle_cli_submit(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1341 {
1342         switch (cmd) {
1343         case CLI_INIT:
1344                 e->command = "cdr submit";
1345                 e->usage = 
1346                         "Usage: cdr submit\n"
1347                         "       Posts all pending batched CDR data to the configured CDR backend engine modules.\n";
1348                 return NULL;
1349         case CLI_GENERATE:
1350                 return NULL;
1351         }
1352         if (a->argc > 2)
1353                 return CLI_SHOWUSAGE;
1354
1355         submit_unscheduled_batch();
1356         ast_cli(a->fd, "Submitted CDRs to backend engines for processing.  This may take a while.\n");
1357
1358         return CLI_SUCCESS;
1359 }
1360
1361 static struct ast_cli_entry cli_submit = AST_CLI_DEFINE(handle_cli_submit, "Posts all pending batched CDR data");
1362 static struct ast_cli_entry cli_status = AST_CLI_DEFINE(handle_cli_status, "Display the CDR status");
1363
1364 static int do_reload(int reload)
1365 {
1366         struct ast_config *config;
1367         const char *enabled_value;
1368         const char *unanswered_value;
1369         const char *batched_value;
1370         const char *scheduleronly_value;
1371         const char *batchsafeshutdown_value;
1372         const char *size_value;
1373         const char *time_value;
1374         const char *end_before_h_value;
1375         const char *initiatedseconds_value;
1376         int cfg_size;
1377         int cfg_time;
1378         int was_enabled;
1379         int was_batchmode;
1380         int res=0;
1381         struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
1382
1383         if ((config = ast_config_load2("cdr.conf", "cdr", config_flags)) == CONFIG_STATUS_FILEUNCHANGED)
1384                 return 0;
1385         if (config == CONFIG_STATUS_FILEMISSING || config == CONFIG_STATUS_FILEUNCHANGED || config == CONFIG_STATUS_FILEINVALID) {
1386                 return 0;
1387         }
1388
1389         ast_mutex_lock(&cdr_batch_lock);
1390
1391         batchsize = BATCH_SIZE_DEFAULT;
1392         batchtime = BATCH_TIME_DEFAULT;
1393         batchscheduleronly = BATCH_SCHEDULER_ONLY_DEFAULT;
1394         batchsafeshutdown = BATCH_SAFE_SHUTDOWN_DEFAULT;
1395         was_enabled = enabled;
1396         was_batchmode = batchmode;
1397         enabled = 1;
1398         batchmode = 0;
1399
1400         /* don't run the next scheduled CDR posting while reloading */
1401         AST_SCHED_DEL(sched, cdr_sched);
1402
1403         if (config) {
1404                 if ((enabled_value = ast_variable_retrieve(config, "general", "enable"))) {
1405                         enabled = ast_true(enabled_value);
1406                 }
1407                 if ((unanswered_value = ast_variable_retrieve(config, "general", "unanswered"))) {
1408                         unanswered = ast_true(unanswered_value);
1409                 }
1410                 if ((batched_value = ast_variable_retrieve(config, "general", "batch"))) {
1411                         batchmode = ast_true(batched_value);
1412                 }
1413                 if ((scheduleronly_value = ast_variable_retrieve(config, "general", "scheduleronly"))) {
1414                         batchscheduleronly = ast_true(scheduleronly_value);
1415                 }
1416                 if ((batchsafeshutdown_value = ast_variable_retrieve(config, "general", "safeshutdown"))) {
1417                         batchsafeshutdown = ast_true(batchsafeshutdown_value);
1418                 }
1419                 if ((size_value = ast_variable_retrieve(config, "general", "size"))) {
1420                         if (sscanf(size_value, "%d", &cfg_size) < 1)
1421                                 ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", size_value);
1422                         else if (cfg_size < 0)
1423                                 ast_log(LOG_WARNING, "Invalid maximum batch size '%d' specified, using default\n", cfg_size);
1424                         else
1425                                 batchsize = cfg_size;
1426                 }
1427                 if ((time_value = ast_variable_retrieve(config, "general", "time"))) {
1428                         if (sscanf(time_value, "%d", &cfg_time) < 1)
1429                                 ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", time_value);
1430                         else if (cfg_time < 0)
1431                                 ast_log(LOG_WARNING, "Invalid maximum batch time '%d' specified, using default\n", cfg_time);
1432                         else
1433                                 batchtime = cfg_time;
1434                 }
1435                 if ((end_before_h_value = ast_variable_retrieve(config, "general", "endbeforehexten")))
1436                         ast_set2_flag(&ast_options, ast_true(end_before_h_value), AST_OPT_FLAG_END_CDR_BEFORE_H_EXTEN);
1437                 if ((initiatedseconds_value = ast_variable_retrieve(config, "general", "initiatedseconds")))
1438                         ast_set2_flag(&ast_options, ast_true(initiatedseconds_value), AST_OPT_FLAG_INITIATED_SECONDS);
1439         }
1440
1441         if (enabled && !batchmode) {
1442                 ast_log(LOG_NOTICE, "CDR simple logging enabled.\n");
1443         } else if (enabled && batchmode) {
1444                 cdr_sched = ast_sched_add(sched, batchtime * 1000, submit_scheduled_batch, NULL);
1445                 ast_log(LOG_NOTICE, "CDR batch mode logging enabled, first of either size %d or time %d seconds.\n", batchsize, batchtime);
1446         } else {
1447                 ast_log(LOG_NOTICE, "CDR logging disabled, data will be lost.\n");
1448         }
1449
1450         /* if this reload enabled the CDR batch mode, create the background thread
1451            if it does not exist */
1452         if (enabled && batchmode && (!was_enabled || !was_batchmode) && (cdr_thread == AST_PTHREADT_NULL)) {
1453                 ast_cond_init(&cdr_pending_cond, NULL);
1454                 if (ast_pthread_create_background(&cdr_thread, NULL, do_cdr, NULL) < 0) {
1455                         ast_log(LOG_ERROR, "Unable to start CDR thread.\n");
1456                         AST_SCHED_DEL(sched, cdr_sched);
1457                 } else {
1458                         ast_cli_register(&cli_submit);
1459                         ast_register_atexit(ast_cdr_engine_term);
1460                         res = 0;
1461                 }
1462         /* if this reload disabled the CDR and/or batch mode and there is a background thread,
1463            kill it */
1464         } else if (((!enabled && was_enabled) || (!batchmode && was_batchmode)) && (cdr_thread != AST_PTHREADT_NULL)) {
1465                 /* wake up the thread so it will exit */
1466                 pthread_cancel(cdr_thread);
1467                 pthread_kill(cdr_thread, SIGURG);
1468                 pthread_join(cdr_thread, NULL);
1469                 cdr_thread = AST_PTHREADT_NULL;
1470                 ast_cond_destroy(&cdr_pending_cond);
1471                 ast_cli_unregister(&cli_submit);
1472                 ast_unregister_atexit(ast_cdr_engine_term);
1473                 res = 0;
1474                 /* if leaving batch mode, then post the CDRs in the batch,
1475                    and don't reschedule, since we are stopping CDR logging */
1476                 if (!batchmode && was_batchmode) {
1477                         ast_cdr_engine_term();
1478                 }
1479         } else {
1480                 res = 0;
1481         }
1482
1483         ast_mutex_unlock(&cdr_batch_lock);
1484         ast_config_destroy(config);
1485         manager_event(EVENT_FLAG_SYSTEM, "Reload", "Module: CDR\r\nMessage: CDR subsystem reload requested\r\n");
1486
1487         return res;
1488 }
1489
1490 int ast_cdr_engine_init(void)
1491 {
1492         int res;
1493
1494         sched = sched_context_create();
1495         if (!sched) {
1496                 ast_log(LOG_ERROR, "Unable to create schedule context.\n");
1497                 return -1;
1498         }
1499
1500         ast_cli_register(&cli_status);
1501
1502         res = do_reload(0);
1503         if (res) {
1504                 ast_mutex_lock(&cdr_batch_lock);
1505                 res = init_batch();
1506                 ast_mutex_unlock(&cdr_batch_lock);
1507         }
1508
1509         return res;
1510 }
1511
1512 /* \note This actually gets called a couple of times at shutdown.  Once, before we start
1513    hanging up channels, and then again, after the channel hangup timeout expires */
1514 void ast_cdr_engine_term(void)
1515 {
1516         ast_cdr_submit_batch(batchsafeshutdown);
1517 }
1518
1519 int ast_cdr_engine_reload(void)
1520 {
1521         return do_reload(1);
1522 }
1523