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