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 #include "asterisk/data.h"
  53
  54 /*! Default AMA flag for billing records (CDR's) */
  55 int ast_default_amaflags = AST_CDR_DOCUMENTATION;
  56 char ast_default_accountcode[AST_MAX_ACCOUNT_CODE];
  57
  58 struct ast_cdr_beitem {
  59         char name[20];
  60         char desc[80];
  61         ast_cdrbe be;
  62         AST_RWLIST_ENTRY(ast_cdr_beitem) list;
  63 };
  64
  65 static AST_RWLIST_HEAD_STATIC(be_list, ast_cdr_beitem);
  66
  67 struct ast_cdr_batch_item {
  68         struct ast_cdr *cdr;
  69         struct ast_cdr_batch_item *next;
  70 };
  71
  72 static struct ast_cdr_batch {
  73         int size;
  74         struct ast_cdr_batch_item *head;
  75         struct ast_cdr_batch_item *tail;
  76 } *batch = NULL;
  77
  78
  79 static int cdr_sequence =  0;
  80
  81 static int cdr_seq_inc(struct ast_cdr *cdr);
  82
  83 static struct sched_context *sched;
  84 static int cdr_sched = -1;
  85 static pthread_t cdr_thread = AST_PTHREADT_NULL;
  86
  87 #define BATCH_SIZE_DEFAULT 100
  88 #define BATCH_TIME_DEFAULT 300
  89 #define BATCH_SCHEDULER_ONLY_DEFAULT 0
  90 #define BATCH_SAFE_SHUTDOWN_DEFAULT 1
  91
  92 static int enabled;             /*! Is the CDR subsystem enabled ? */
  93 static int unanswered;
  94 static int batchmode;
  95 static int batchsize;
  96 static int batchtime;
  97 static int batchscheduleronly;
  98 static int batchsafeshutdown;
  99
 100 AST_MUTEX_DEFINE_STATIC(cdr_batch_lock);
 101
 102 /* these are used to wake up the CDR thread when there's work to do */
 103 AST_MUTEX_DEFINE_STATIC(cdr_pending_lock);
 104 static ast_cond_t cdr_pending_cond;
 105
 106 int check_cdr_enabled()
 107 {
 108         return enabled;
 109 }
 110
 111 /*! Register a CDR driver. Each registered CDR driver generates a CDR
 112         \return 0 on success, -1 on failure
 113 */
 114 int ast_cdr_register(const char *name, const char *desc, ast_cdrbe be)
 115 {
 116         struct ast_cdr_beitem *i = NULL;
 117
 118         if (!name)
 119                 return -1;
 120
 121         if (!be) {
 122                 ast_log(LOG_WARNING, "CDR engine '%s' lacks backend\n", name);
 123                 return -1;
 124         }
 125
 126         AST_RWLIST_WRLOCK(&be_list);
 127         AST_RWLIST_TRAVERSE(&be_list, i, list) {
 128                 if (!strcasecmp(name, i->name)) {
 129                         ast_log(LOG_WARNING, "Already have a CDR backend called '%s'\n", name);
 130                         AST_RWLIST_UNLOCK(&be_list);
 131                         return -1;
 132                 }
 133         }
 134
 135         if (!(i = ast_calloc(1, sizeof(*i))))
 136                 return -1;
 137
 138         i->be = be;
 139         ast_copy_string(i->name, name, sizeof(i->name));
 140         ast_copy_string(i->desc, desc, sizeof(i->desc));
 141
 142         AST_RWLIST_INSERT_HEAD(&be_list, i, list);
 143         AST_RWLIST_UNLOCK(&be_list);
 144
 145         return 0;
 146 }
 147
 148 /*! unregister a CDR driver */
 149 void ast_cdr_unregister(const char *name)
 150 {
 151         struct ast_cdr_beitem *i = NULL;
 152
 153         AST_RWLIST_WRLOCK(&be_list);
 154         AST_RWLIST_TRAVERSE_SAFE_BEGIN(&be_list, i, list) {
 155                 if (!strcasecmp(name, i->name)) {
 156                         AST_RWLIST_REMOVE_CURRENT(list);
 157                         break;
 158                 }
 159         }
 160         AST_RWLIST_TRAVERSE_SAFE_END;
 161         AST_RWLIST_UNLOCK(&be_list);
 162
 163         if (i) {
 164                 ast_verb(2, "Unregistered '%s' CDR backend\n", name);
 165                 ast_free(i);
 166         }
 167 }
 168
 169 int ast_cdr_isset_unanswered(void)
 170 {
 171         return unanswered;
 172 }
 173
 174 struct ast_cdr *ast_cdr_dup_unique(struct ast_cdr *cdr)
 175 {
 176         struct ast_cdr *newcdr = ast_cdr_dup(cdr);
 177         if (!newcdr)
 178                 return NULL;
 179
 180         cdr_seq_inc(newcdr);
 181         return newcdr;
 182 }
 183
 184 struct ast_cdr *ast_cdr_dup_unique_swap(struct ast_cdr *cdr)
 185 {
 186         struct ast_cdr *newcdr = ast_cdr_dup(cdr);
 187         if (!newcdr)
 188                 return NULL;
 189
 190         cdr_seq_inc(cdr);
 191         return newcdr;
 192 }
 193
 194 /*! Duplicate a CDR record
 195         \returns Pointer to new CDR record
 196 */
 197 struct ast_cdr *ast_cdr_dup(struct ast_cdr *cdr)
 198 {
 199         struct ast_cdr *newcdr;
 200
 201         if (!cdr) /* don't die if we get a null cdr pointer */
 202                 return NULL;
 203         newcdr = ast_cdr_alloc();
 204         if (!newcdr)
 205                 return NULL;
 206
 207         memcpy(newcdr, cdr, sizeof(*newcdr));
 208         /* The varshead is unusable, volatile even, after the memcpy so we take care of that here */
 209         memset(&newcdr->varshead, 0, sizeof(newcdr->varshead));
 210         ast_cdr_copy_vars(newcdr, cdr);
 211         newcdr->next = NULL;
 212
 213         return newcdr;
 214 }
 215
 216 static const char *ast_cdr_getvar_internal(struct ast_cdr *cdr, const char *name, int recur)
 217 {
 218         if (ast_strlen_zero(name))
 219                 return NULL;
 220
 221         for (; cdr; cdr = recur ? cdr->next : NULL) {
 222                 struct ast_var_t *variables;
 223                 struct varshead *headp = &cdr->varshead;
 224                 AST_LIST_TRAVERSE(headp, variables, entries) {
 225                         if (!strcasecmp(name, ast_var_name(variables)))
 226                                 return ast_var_value(variables);
 227                 }
 228         }
 229
 230         return NULL;
 231 }
 232
 233 static void cdr_get_tv(struct timeval when, const char *fmt, char *buf, int bufsize)
 234 {
 235         if (fmt == NULL) {      /* raw mode */
 236                 snprintf(buf, bufsize, "%ld.%06ld", (long)when.tv_sec, (long)when.tv_usec);
 237         } else {
 238                 if (when.tv_sec) {
 239                         struct ast_tm tm;
 240
 241                         ast_localtime(&when, &tm, NULL);
 242                         ast_strftime(buf, bufsize, fmt, &tm);
 243                 }
 244         }
 245 }
 246
 247 /*! CDR channel variable retrieval */
 248 void ast_cdr_getvar(struct ast_cdr *cdr, const char *name, char **ret, char *workspace, int workspacelen, int recur, int raw)
 249 {
 250         const char *fmt = "%Y-%m-%d %T";
 251         const char *varbuf;
 252
 253         if (!cdr)  /* don't die if the cdr is null */
 254                 return;
 255
 256         *ret = NULL;
 257         /* special vars (the ones from the struct ast_cdr when requested by name)
 258            I'd almost say we should convert all the stringed vals to vars */
 259
 260         if (!strcasecmp(name, "clid"))
 261                 ast_copy_string(workspace, cdr->clid, workspacelen);
 262         else if (!strcasecmp(name, "src"))
 263                 ast_copy_string(workspace, cdr->src, workspacelen);
 264         else if (!strcasecmp(name, "dst"))
 265                 ast_copy_string(workspace, cdr->dst, workspacelen);
 266         else if (!strcasecmp(name, "dcontext"))
 267                 ast_copy_string(workspace, cdr->dcontext, workspacelen);
 268         else if (!strcasecmp(name, "channel"))
 269                 ast_copy_string(workspace, cdr->channel, workspacelen);
 270         else if (!strcasecmp(name, "dstchannel"))
 271                 ast_copy_string(workspace, cdr->dstchannel, workspacelen);
 272         else if (!strcasecmp(name, "lastapp"))
 273                 ast_copy_string(workspace, cdr->lastapp, workspacelen);
 274         else if (!strcasecmp(name, "lastdata"))
 275                 ast_copy_string(workspace, cdr->lastdata, workspacelen);
 276         else if (!strcasecmp(name, "start"))
 277                 cdr_get_tv(cdr->start, raw ? NULL : fmt, workspace, workspacelen);
 278         else if (!strcasecmp(name, "answer"))
 279                 cdr_get_tv(cdr->answer, raw ? NULL : fmt, workspace, workspacelen);
 280         else if (!strcasecmp(name, "end"))
 281                 cdr_get_tv(cdr->end, raw ? NULL : fmt, workspace, workspacelen);
 282         else if (!strcasecmp(name, "duration"))
 283                 snprintf(workspace, workspacelen, "%ld", cdr->duration ? cdr->duration : (long)ast_tvdiff_ms(ast_tvnow(), cdr->start) / 1000);
 284         else if (!strcasecmp(name, "billsec"))
 285                 snprintf(workspace, workspacelen, "%ld", cdr->billsec || cdr->answer.tv_sec == 0 ? cdr->billsec : (long)ast_tvdiff_ms(ast_tvnow(), cdr->answer) / 1000);
 286         else if (!strcasecmp(name, "disposition")) {
 287                 if (raw) {
 288                         snprintf(workspace, workspacelen, "%ld", cdr->disposition);
 289                 } else {
 290                         ast_copy_string(workspace, ast_cdr_disp2str(cdr->disposition), workspacelen);
 291                 }
 292         } else if (!strcasecmp(name, "amaflags")) {
 293                 if (raw) {
 294                         snprintf(workspace, workspacelen, "%ld", cdr->amaflags);
 295                 } else {
 296                         ast_copy_string(workspace, ast_cdr_flags2str(cdr->amaflags), workspacelen);
 297                 }
 298         } else if (!strcasecmp(name, "accountcode"))
 299                 ast_copy_string(workspace, cdr->accountcode, workspacelen);
 300         else if (!strcasecmp(name, "peeraccount"))
 301                 ast_copy_string(workspace, cdr->peeraccount, workspacelen);
 302         else if (!strcasecmp(name, "uniqueid"))
 303                 ast_copy_string(workspace, cdr->uniqueid, workspacelen);
 304         else if (!strcasecmp(name, "linkedid"))
 305                 ast_copy_string(workspace, cdr->linkedid, workspacelen);
 306         else if (!strcasecmp(name, "userfield"))
 307                 ast_copy_string(workspace, cdr->userfield, workspacelen);
 308         else if (!strcasecmp(name, "sequence"))
 309                 snprintf(workspace, workspacelen, "%d", cdr->sequence);
 310         else if ((varbuf = ast_cdr_getvar_internal(cdr, name, recur)))
 311                 ast_copy_string(workspace, varbuf, workspacelen);
 312         else
 313                 workspace[0] = '\0';
 314
 315         if (!ast_strlen_zero(workspace))
 316                 *ret = workspace;
 317 }
 318
 319 /* readonly cdr variables */
 320 static const char * const cdr_readonly_vars[] = { "clid", "src", "dst", "dcontext", "channel", "dstchannel",
 321                                                   "lastapp", "lastdata", "start", "answer", "end", "duration",
 322                                                   "billsec", "disposition", "amaflags", "accountcode", "uniqueid", "linkedid",
 323                                                   "userfield", "sequence", NULL };
 324 /*! Set a CDR channel variable
 325         \note You can't set the CDR variables that belong to the actual CDR record, like "billsec".
 326 */
 327 int ast_cdr_setvar(struct ast_cdr *cdr, const char *name, const char *value, int recur)
 328 {
 329         struct ast_var_t *newvariable;
 330         struct varshead *headp;
 331         int x;
 332
 333         for (x = 0; cdr_readonly_vars[x]; x++) {
 334                 if (!strcasecmp(name, cdr_readonly_vars[x])) {
 335                         ast_log(LOG_ERROR, "Attempt to set the '%s' read-only variable!.\n", name);
 336                         return -1;
 337                 }
 338         }
 339
 340         if (!cdr) {
 341                 ast_log(LOG_ERROR, "Attempt to set a variable on a nonexistent CDR record.\n");
 342                 return -1;
 343         }
 344
 345         for (; cdr; cdr = recur ? cdr->next : NULL) {
 346                 if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
 347                         continue;
 348                 headp = &cdr->varshead;
 349                 AST_LIST_TRAVERSE_SAFE_BEGIN(headp, newvariable, entries) {
 350                         if (!strcasecmp(ast_var_name(newvariable), name)) {
 351                                 /* there is already such a variable, delete it */
 352                                 AST_LIST_REMOVE_CURRENT(entries);
 353                                 ast_var_delete(newvariable);
 354                                 break;
 355                         }
 356                 }
 357                 AST_LIST_TRAVERSE_SAFE_END;
 358
 359                 if (value) {
 360                         newvariable = ast_var_assign(name, value);
 361                         AST_LIST_INSERT_HEAD(headp, newvariable, entries);
 362                 }
 363         }
 364
 365         return 0;
 366 }
 367
 368 int ast_cdr_copy_vars(struct ast_cdr *to_cdr, struct ast_cdr *from_cdr)
 369 {
 370         struct ast_var_t *variables, *newvariable = NULL;
 371         struct varshead *headpa, *headpb;
 372         const char *var, *val;
 373         int x = 0;
 374
 375         if (!to_cdr || !from_cdr) /* don't die if one of the pointers is null */
 376                 return 0;
 377
 378         headpa = &from_cdr->varshead;
 379         headpb = &to_cdr->varshead;
 380
 381         AST_LIST_TRAVERSE(headpa,variables,entries) {
 382                 if (variables &&
 383                     (var = ast_var_name(variables)) && (val = ast_var_value(variables)) &&
 384                     !ast_strlen_zero(var) && !ast_strlen_zero(val)) {
 385                         newvariable = ast_var_assign(var, val);
 386                         AST_LIST_INSERT_HEAD(headpb, newvariable, entries);
 387                         x++;
 388                 }
 389         }
 390
 391         return x;
 392 }
 393
 394 int ast_cdr_serialize_variables(struct ast_cdr *cdr, struct ast_str **buf, char delim, char sep, int recur)
 395 {
 396         struct ast_var_t *variables;
 397         const char *var, *val;
 398         char *tmp;
 399         char workspace[256];
 400         int total = 0, x = 0, i;
 401
 402         ast_str_reset(*buf);
 403
 404         for (; cdr; cdr = recur ? cdr->next : NULL) {
 405                 if (++x > 1)
 406                         ast_str_append(buf, 0, "\n");
 407
 408                 AST_LIST_TRAVERSE(&cdr->varshead, variables, entries) {
 409                         if (variables &&
 410                             (var = ast_var_name(variables)) && (val = ast_var_value(variables)) &&
 411                             !ast_strlen_zero(var) && !ast_strlen_zero(val)) {
 412                                 if (ast_str_append(buf, 0, "level %d: %s%c%s%c", x, var, delim, val, sep) < 0) {
 413                                         ast_log(LOG_ERROR, "Data Buffer Size Exceeded!\n");
 414                                         break;
 415                                 } else
 416                                         total++;
 417                         } else
 418                                 break;
 419                 }
 420
 421                 for (i = 0; cdr_readonly_vars[i]; i++) {
 422                         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 */
 423                         ast_cdr_getvar(cdr, cdr_readonly_vars[i], &tmp, workspace, sizeof(workspace), 0, 0);
 424                         if (!tmp)
 425                                 continue;
 426
 427                         if (ast_str_append(buf, 0, "level %d: %s%c%s%c", x, cdr_readonly_vars[i], delim, tmp, sep) < 0) {
 428                                 ast_log(LOG_ERROR, "Data Buffer Size Exceeded!\n");
 429                                 break;
 430                         } else
 431                                 total++;
 432                 }
 433         }
 434
 435         return total;
 436 }
 437
 438
 439 void ast_cdr_free_vars(struct ast_cdr *cdr, int recur)
 440 {
 441
 442         /* clear variables */
 443         for (; cdr; cdr = recur ? cdr->next : NULL) {
 444                 struct ast_var_t *vardata;
 445                 struct varshead *headp = &cdr->varshead;
 446                 while ((vardata = AST_LIST_REMOVE_HEAD(headp, entries)))
 447                         ast_var_delete(vardata);
 448         }
 449 }
 450
 451 /*! \brief  print a warning if cdr already posted */
 452 static void check_post(struct ast_cdr *cdr)
 453 {
 454         if (!cdr)
 455                 return;
 456         if (ast_test_flag(cdr, AST_CDR_FLAG_POSTED))
 457                 ast_log(LOG_NOTICE, "CDR on channel '%s' already posted\n", S_OR(cdr->channel, "<unknown>"));
 458 }
 459
 460 void ast_cdr_free(struct ast_cdr *cdr)
 461 {
 462
 463         while (cdr) {
 464                 struct ast_cdr *next = cdr->next;
 465
 466                 ast_cdr_free_vars(cdr, 0);
 467                 ast_free(cdr);
 468                 cdr = next;
 469         }
 470 }
 471
 472 /*! \brief the same as a cdr_free call, only with no checks; just get rid of it */
 473 void ast_cdr_discard(struct ast_cdr *cdr)
 474 {
 475         while (cdr) {
 476                 struct ast_cdr *next = cdr->next;
 477
 478                 ast_cdr_free_vars(cdr, 0);
 479                 ast_free(cdr);
 480                 cdr = next;
 481         }
 482 }
 483
 484 struct ast_cdr *ast_cdr_alloc(void)
 485 {
 486         struct ast_cdr *x;
 487         x = ast_calloc(1, sizeof(*x));
 488         if (!x)
 489                 ast_log(LOG_ERROR,"Allocation Failure for a CDR!\n");
 490         return x;
 491 }
 492
 493 static void cdr_merge_vars(struct ast_cdr *to, struct ast_cdr *from)
 494 {
 495         struct ast_var_t *variablesfrom,*variablesto;
 496         struct varshead *headpfrom = &to->varshead;
 497         struct varshead *headpto = &from->varshead;
 498         AST_LIST_TRAVERSE_SAFE_BEGIN(headpfrom, variablesfrom, entries) {
 499                 /* for every var in from, stick it in to */
 500                 const char *fromvarname, *fromvarval;
 501                 const char *tovarname = NULL, *tovarval = NULL;
 502                 fromvarname = ast_var_name(variablesfrom);
 503                 fromvarval = ast_var_value(variablesfrom);
 504                 tovarname = 0;
 505
 506                 /* now, quick see if that var is in the 'to' cdr already */
 507                 AST_LIST_TRAVERSE(headpto, variablesto, entries) {
 508
 509                         /* now, quick see if that var is in the 'to' cdr already */
 510                         if ( strcasecmp(fromvarname, ast_var_name(variablesto)) == 0 ) {
 511                                 tovarname = ast_var_name(variablesto);
 512                                 tovarval = ast_var_value(variablesto);
 513                                 break;
 514                         }
 515                 }
 516                 if (tovarname && strcasecmp(fromvarval,tovarval) != 0) {  /* this message here to see how irritating the userbase finds it */
 517                         ast_log(LOG_NOTICE, "Merging CDR's: variable %s value %s dropped in favor of value %s\n", tovarname, fromvarval, tovarval);
 518                         continue;
 519                 } else if (tovarname && strcasecmp(fromvarval,tovarval) == 0) /* if they are the same, the job is done */
 520                         continue;
 521
 522                 /* rip this var out of the from cdr, and stick it in the to cdr */
 523                 AST_LIST_MOVE_CURRENT(headpto, entries);
 524         }
 525         AST_LIST_TRAVERSE_SAFE_END;
 526 }
 527
 528 void ast_cdr_merge(struct ast_cdr *to, struct ast_cdr *from)
 529 {
 530         struct ast_cdr *zcdr;
 531         struct ast_cdr *lto = NULL;
 532         struct ast_cdr *lfrom = NULL;
 533         int discard_from = 0;
 534
 535         if (!to || !from)
 536                 return;
 537
 538         /* don't merge into locked CDR's -- it's bad business */
 539         if (ast_test_flag(to, AST_CDR_FLAG_LOCKED)) {
 540                 zcdr = to; /* safety valve? */
 541                 while (to->next) {
 542                         lto = to;
 543                         to = to->next;
 544                 }
 545
 546                 if (ast_test_flag(to, AST_CDR_FLAG_LOCKED)) {
 547                         ast_log(LOG_WARNING, "Merging into locked CDR... no choice.");
 548                         to = zcdr; /* safety-- if all there are is locked CDR's, then.... ?? */
 549                         lto = NULL;
 550                 }
 551         }
 552
 553         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED)) {
 554                 struct ast_cdr *llfrom = NULL;
 555                 discard_from = 1;
 556                 if (lto) {
 557                         /* insert the from stuff after lto */
 558                         lto->next = from;
 559                         lfrom = from;
 560                         while (lfrom && lfrom->next) {
 561                                 if (!lfrom->next->next)
 562                                         llfrom = lfrom;
 563                                 lfrom = lfrom->next;
 564                         }
 565                         /* rip off the last entry and put a copy of the to at the end */
 566                         llfrom->next = to;
 567                         from = lfrom;
 568                 } else {
 569                         /* save copy of the current *to cdr */
 570                         struct ast_cdr tcdr;
 571                         memcpy(&tcdr, to, sizeof(tcdr));
 572                         /* copy in the locked from cdr */
 573                         memcpy(to, from, sizeof(*to));
 574                         lfrom = from;
 575                         while (lfrom && lfrom->next) {
 576                                 if (!lfrom->next->next)
 577                                         llfrom = lfrom;
 578                                 lfrom = lfrom->next;
 579                         }
 580                         from->next = NULL;
 581                         /* rip off the last entry and put a copy of the to at the end */
 582                         if (llfrom == from)
 583                                 to = to->next = ast_cdr_dup(&tcdr);
 584                         else
 585                                 to = llfrom->next = ast_cdr_dup(&tcdr);
 586                         from = lfrom;
 587                 }
 588         }
 589
 590         if (!ast_tvzero(from->start)) {
 591                 if (!ast_tvzero(to->start)) {
 592                         if (ast_tvcmp(to->start, from->start) > 0 ) {
 593                                 to->start = from->start; /* use the earliest time */
 594                                 from->start = ast_tv(0,0); /* we actively "steal" these values */
 595                         }
 596                         /* else nothing to do */
 597                 } else {
 598                         to->start = from->start;
 599                         from->start = ast_tv(0,0); /* we actively "steal" these values */
 600                 }
 601         }
 602         if (!ast_tvzero(from->answer)) {
 603                 if (!ast_tvzero(to->answer)) {
 604                         if (ast_tvcmp(to->answer, from->answer) > 0 ) {
 605                                 to->answer = from->answer; /* use the earliest time */
 606                                 from->answer = ast_tv(0,0); /* we actively "steal" these values */
 607                         }
 608                         /* we got the earliest answer time, so we'll settle for that? */
 609                 } else {
 610                         to->answer = from->answer;
 611                         from->answer = ast_tv(0,0); /* we actively "steal" these values */
 612                 }
 613         }
 614         if (!ast_tvzero(from->end)) {
 615                 if (!ast_tvzero(to->end)) {
 616                         if (ast_tvcmp(to->end, from->end) < 0 ) {
 617                                 to->end = from->end; /* use the latest time */
 618                                 from->end = ast_tv(0,0); /* we actively "steal" these values */
 619                                 to->duration = to->end.tv_sec - to->start.tv_sec;  /* don't forget to update the duration, billsec, when we set end */
 620                                 to->billsec = ast_tvzero(to->answer) ? 0 : to->end.tv_sec - to->answer.tv_sec;
 621                         }
 622                         /* else, nothing to do */
 623                 } else {
 624                         to->end = from->end;
 625                         from->end = ast_tv(0,0); /* we actively "steal" these values */
 626                         to->duration = to->end.tv_sec - to->start.tv_sec;
 627                         to->billsec = ast_tvzero(to->answer) ? 0 : to->end.tv_sec - to->answer.tv_sec;
 628                 }
 629         }
 630         if (to->disposition < from->disposition) {
 631                 to->disposition = from->disposition;
 632                 from->disposition = AST_CDR_NOANSWER;
 633         }
 634         if (ast_strlen_zero(to->lastapp) && !ast_strlen_zero(from->lastapp)) {
 635                 ast_copy_string(to->lastapp, from->lastapp, sizeof(to->lastapp));
 636                 from->lastapp[0] = 0; /* theft */
 637         }
 638         if (ast_strlen_zero(to->lastdata) && !ast_strlen_zero(from->lastdata)) {
 639                 ast_copy_string(to->lastdata, from->lastdata, sizeof(to->lastdata));
 640                 from->lastdata[0] = 0; /* theft */
 641         }
 642         if (ast_strlen_zero(to->dcontext) && !ast_strlen_zero(from->dcontext)) {
 643                 ast_copy_string(to->dcontext, from->dcontext, sizeof(to->dcontext));
 644                 from->dcontext[0] = 0; /* theft */
 645         }
 646         if (ast_strlen_zero(to->dstchannel) && !ast_strlen_zero(from->dstchannel)) {
 647                 ast_copy_string(to->dstchannel, from->dstchannel, sizeof(to->dstchannel));
 648                 from->dstchannel[0] = 0; /* theft */
 649         }
 650         if (!ast_strlen_zero(from->channel) && (ast_strlen_zero(to->channel) || !strncasecmp(from->channel, "Agent/", 6))) {
 651                 ast_copy_string(to->channel, from->channel, sizeof(to->channel));
 652                 from->channel[0] = 0; /* theft */
 653         }
 654         if (ast_strlen_zero(to->src) && !ast_strlen_zero(from->src)) {
 655                 ast_copy_string(to->src, from->src, sizeof(to->src));
 656                 from->src[0] = 0; /* theft */
 657         }
 658         if (ast_strlen_zero(to->clid) && !ast_strlen_zero(from->clid)) {
 659                 ast_copy_string(to->clid, from->clid, sizeof(to->clid));
 660                 from->clid[0] = 0; /* theft */
 661         }
 662         if (ast_strlen_zero(to->dst) && !ast_strlen_zero(from->dst)) {
 663                 ast_copy_string(to->dst, from->dst, sizeof(to->dst));
 664                 from->dst[0] = 0; /* theft */
 665         }
 666         if (!to->amaflags)
 667                 to->amaflags = AST_CDR_DOCUMENTATION;
 668         if (!from->amaflags)
 669                 from->amaflags = AST_CDR_DOCUMENTATION; /* make sure both amaflags are set to something (DOC is default) */
 670         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (to->amaflags == AST_CDR_DOCUMENTATION && from->amaflags != AST_CDR_DOCUMENTATION)) {
 671                 to->amaflags = from->amaflags;
 672         }
 673         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->accountcode) && !ast_strlen_zero(from->accountcode))) {
 674                 ast_copy_string(to->accountcode, from->accountcode, sizeof(to->accountcode));
 675         }
 676         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->peeraccount) && !ast_strlen_zero(from->peeraccount))) {
 677                 ast_copy_string(to->peeraccount, from->peeraccount, sizeof(to->peeraccount));
 678         }
 679         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->userfield) && !ast_strlen_zero(from->userfield))) {
 680                 ast_copy_string(to->userfield, from->userfield, sizeof(to->userfield));
 681         }
 682         /* flags, varsead, ? */
 683         cdr_merge_vars(from, to);
 684
 685         if (ast_test_flag(from, AST_CDR_FLAG_KEEP_VARS))
 686                 ast_set_flag(to, AST_CDR_FLAG_KEEP_VARS);
 687         if (ast_test_flag(from, AST_CDR_FLAG_POSTED))
 688                 ast_set_flag(to, AST_CDR_FLAG_POSTED);
 689         if (ast_test_flag(from, AST_CDR_FLAG_LOCKED))
 690                 ast_set_flag(to, AST_CDR_FLAG_LOCKED);
 691         if (ast_test_flag(from, AST_CDR_FLAG_CHILD))
 692                 ast_set_flag(to, AST_CDR_FLAG_CHILD);
 693         if (ast_test_flag(from, AST_CDR_FLAG_POST_DISABLED))
 694                 ast_set_flag(to, AST_CDR_FLAG_POST_DISABLED);
 695
 696         /* last, but not least, we need to merge any forked CDRs to the 'to' cdr */
 697         while (from->next) {
 698                 /* just rip 'em off the 'from' and insert them on the 'to' */
 699                 zcdr = from->next;
 700                 from->next = zcdr->next;
 701                 zcdr->next = NULL;
 702                 /* zcdr is now ripped from the current list; */
 703                 ast_cdr_append(to, zcdr);
 704         }
 705         if (discard_from)
 706                 ast_cdr_discard(from);
 707 }
 708
 709 void ast_cdr_start(struct ast_cdr *cdr)
 710 {
 711         char *chan;
 712
 713         for (; cdr; cdr = cdr->next) {
 714                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
 715                         chan = S_OR(cdr->channel, "<unknown>");
 716                         check_post(cdr);
 717                         cdr->start = ast_tvnow();
 718                 }
 719         }
 720 }
 721
 722 void ast_cdr_answer(struct ast_cdr *cdr)
 723 {
 724
 725         for (; cdr; cdr = cdr->next) {
 726                 if (ast_test_flag(cdr, AST_CDR_FLAG_ANSLOCKED))
 727                         continue;
 728                 if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
 729                         continue;
 730                 check_post(cdr);
 731                 if (cdr->disposition < AST_CDR_ANSWERED)
 732                         cdr->disposition = AST_CDR_ANSWERED;
 733                 if (ast_tvzero(cdr->answer))
 734                         cdr->answer = ast_tvnow();
 735         }
 736 }
 737
 738 void ast_cdr_busy(struct ast_cdr *cdr)
 739 {
 740
 741         for (; cdr; cdr = cdr->next) {
 742                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
 743                         check_post(cdr);
 744                         cdr->disposition = AST_CDR_BUSY;
 745                 }
 746         }
 747 }
 748
 749 void ast_cdr_failed(struct ast_cdr *cdr)
 750 {
 751         for (; cdr; cdr = cdr->next) {
 752                 check_post(cdr);
 753                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
 754                         check_post(cdr);
 755                         if (cdr->disposition < AST_CDR_FAILED)
 756                                 cdr->disposition = AST_CDR_FAILED;
 757                 }
 758         }
 759 }
 760
 761 void ast_cdr_noanswer(struct ast_cdr *cdr)
 762 {
 763         char *chan;
 764
 765         while (cdr) {
 766                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
 767                         chan = !ast_strlen_zero(cdr->channel) ? cdr->channel : "<unknown>";
 768                         check_post(cdr);
 769                         cdr->disposition = AST_CDR_NOANSWER;
 770                 }
 771                 cdr = cdr->next;
 772         }
 773 }
 774
 775 /* everywhere ast_cdr_disposition is called, it will call ast_cdr_failed()
 776    if ast_cdr_disposition returns a non-zero value */
 777
 778 int ast_cdr_disposition(struct ast_cdr *cdr, int cause)
 779 {
 780         int res = 0;
 781
 782         for (; cdr; cdr = cdr->next) {
 783                 switch (cause) {  /* handle all the non failure, busy cases, return 0 not to set disposition,
 784                                                         return -1 to set disposition to FAILED */
 785                 case AST_CAUSE_BUSY:
 786                         ast_cdr_busy(cdr);
 787                         break;
 788                 case AST_CAUSE_NO_ANSWER:
 789                         ast_cdr_noanswer(cdr);
 790                         break;
 791                 case AST_CAUSE_NORMAL:
 792                         break;
 793                 default:
 794                         res = -1;
 795                 }
 796         }
 797         return res;
 798 }
 799
 800 void ast_cdr_setdestchan(struct ast_cdr *cdr, const char *chann)
 801 {
 802         for (; cdr; cdr = cdr->next) {
 803                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
 804                         check_post(cdr);
 805                         ast_copy_string(cdr->dstchannel, chann, sizeof(cdr->dstchannel));
 806                 }
 807         }
 808 }
 809
 810 void ast_cdr_setapp(struct ast_cdr *cdr, const char *app, const char *data)
 811 {
 812
 813         for (; cdr; cdr = cdr->next) {
 814                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
 815                         check_post(cdr);
 816                         ast_copy_string(cdr->lastapp, S_OR(app, ""), sizeof(cdr->lastapp));
 817                         ast_copy_string(cdr->lastdata, S_OR(data, ""), sizeof(cdr->lastdata));
 818                 }
 819         }
 820 }
 821
 822 void ast_cdr_setanswer(struct ast_cdr *cdr, struct timeval t)
 823 {
 824
 825         for (; cdr; cdr = cdr->next) {
 826                 if (ast_test_flag(cdr, AST_CDR_FLAG_ANSLOCKED))
 827                         continue;
 828                 if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
 829                         continue;
 830                 check_post(cdr);
 831                 cdr->answer = t;
 832         }
 833 }
 834
 835 void ast_cdr_setdisposition(struct ast_cdr *cdr, long int disposition)
 836 {
 837
 838         for (; cdr; cdr = cdr->next) {
 839                 if (ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
 840                         continue;
 841                 check_post(cdr);
 842                 cdr->disposition = disposition;
 843         }
 844 }
 845
 846 /* set cid info for one record */
 847 static void set_one_cid(struct ast_cdr *cdr, struct ast_channel *c)
 848 {
 849         /* Grab source from ANI or normal Caller*ID */
 850         const char *num = S_OR(c->cid.cid_ani, c->cid.cid_num);
 851         if (!cdr)
 852                 return;
 853         if (!ast_strlen_zero(c->cid.cid_name)) {
 854                 if (!ast_strlen_zero(num))      /* both name and number */
 855                         snprintf(cdr->clid, sizeof(cdr->clid), "\"%s\" <%s>", c->cid.cid_name, num);
 856                 else                            /* only name */
 857                         ast_copy_string(cdr->clid, c->cid.cid_name, sizeof(cdr->clid));
 858         } else if (!ast_strlen_zero(num)) {     /* only number */
 859                 ast_copy_string(cdr->clid, num, sizeof(cdr->clid));
 860         } else {                                /* nothing known */
 861                 cdr->clid[0] = '\0';
 862         }
 863         ast_copy_string(cdr->src, S_OR(num, ""), sizeof(cdr->src));
 864         ast_cdr_setvar(cdr, "dnid", S_OR(c->cid.cid_dnid, ""), 0);
 865
 866         if (c->cid.subaddress.valid) {
 867                 ast_cdr_setvar(cdr, "callingsubaddr", S_OR(c->cid.subaddress.str, ""), 0);
 868         }
 869         if (c->cid.dialed_subaddress.valid) {
 870                 ast_cdr_setvar(cdr, "calledsubaddr", S_OR(c->cid.dialed_subaddress.str, ""), 0);
 871         }
 872 }
 873
 874 int ast_cdr_setcid(struct ast_cdr *cdr, struct ast_channel *c)
 875 {
 876         for (; cdr; cdr = cdr->next) {
 877                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
 878                         set_one_cid(cdr, c);
 879         }
 880         return 0;
 881 }
 882
 883 static int cdr_seq_inc(struct ast_cdr *cdr)
 884 {
 885         return (cdr->sequence = ast_atomic_fetchadd_int(&cdr_sequence, +1));
 886 }
 887
 888 int ast_cdr_init(struct ast_cdr *cdr, struct ast_channel *c)
 889 {
 890         char *chan;
 891
 892         for ( ; cdr ; cdr = cdr->next) {
 893                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
 894                         chan = S_OR(cdr->channel, "<unknown>");
 895                         ast_copy_string(cdr->channel, c->name, sizeof(cdr->channel));
 896                         set_one_cid(cdr, c);
 897                         cdr_seq_inc(cdr);
 898
 899                         cdr->disposition = (c->_state == AST_STATE_UP) ?  AST_CDR_ANSWERED : AST_CDR_NOANSWER;
 900                         cdr->amaflags = c->amaflags ? c->amaflags :  ast_default_amaflags;
 901                         ast_copy_string(cdr->accountcode, c->accountcode, sizeof(cdr->accountcode));
 902                         ast_copy_string(cdr->peeraccount, c->peeraccount, sizeof(cdr->peeraccount));
 903                         /* Destination information */
 904                         ast_copy_string(cdr->dst, S_OR(c->macroexten,c->exten), sizeof(cdr->dst));
 905                         ast_copy_string(cdr->dcontext, S_OR(c->macrocontext,c->context), sizeof(cdr->dcontext));
 906                         /* Unique call identifier */
 907                         ast_copy_string(cdr->uniqueid, c->uniqueid, sizeof(cdr->uniqueid));
 908                         /* Linked call identifier */
 909                         ast_copy_string(cdr->linkedid, c->linkedid, sizeof(cdr->linkedid));
 910                 }
 911         }
 912         return 0;
 913 }
 914
 915 /* Three routines were "fixed" via 10668, and later shown that
 916    users were depending on this behavior. ast_cdr_end,
 917    ast_cdr_setvar and ast_cdr_answer are the three routines.
 918    While most of the other routines would not touch
 919    LOCKED cdr's, these three routines were designed to
 920    operate on locked CDR's as a matter of course.
 921    I now appreciate how this plays with the ForkCDR app,
 922    which forms these cdr chains in the first place.
 923    cdr_end is pretty key: all cdrs created are closed
 924    together. They only vary by start time. Arithmetically,
 925    users can calculate the subintervals they wish to track. */
 926
 927 void ast_cdr_end(struct ast_cdr *cdr)
 928 {
 929         for ( ; cdr ; cdr = cdr->next) {
 930                 if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
 931                         continue;
 932                 check_post(cdr);
 933                 if (ast_tvzero(cdr->end))
 934                         cdr->end = ast_tvnow();
 935                 if (ast_tvzero(cdr->start)) {
 936                         ast_log(LOG_WARNING, "CDR on channel '%s' has not started\n", S_OR(cdr->channel, "<unknown>"));
 937                         cdr->disposition = AST_CDR_FAILED;
 938                 } else
 939                         cdr->duration = cdr->end.tv_sec - cdr->start.tv_sec;
 940                 if (ast_tvzero(cdr->answer)) {
 941                         if (cdr->disposition == AST_CDR_ANSWERED) {
 942                                 ast_log(LOG_WARNING, "CDR on channel '%s' has no answer time but is 'ANSWERED'\n", S_OR(cdr->channel, "<unknown>"));
 943                                 cdr->disposition = AST_CDR_FAILED;
 944                         }
 945                 } else {
 946                         cdr->billsec = cdr->end.tv_sec - cdr->answer.tv_sec;
 947                         if (ast_test_flag(&ast_options, AST_OPT_FLAG_INITIATED_SECONDS))
 948                                 cdr->billsec += cdr->end.tv_usec > cdr->answer.tv_usec ? 1 : 0;
 949                 }
 950         }
 951 }
 952
 953 char *ast_cdr_disp2str(int disposition)
 954 {
 955         switch (disposition) {
 956         case AST_CDR_NULL:
 957                 return "NO ANSWER"; /* by default, for backward compatibility */
 958         case AST_CDR_NOANSWER:
 959                 return "NO ANSWER";
 960         case AST_CDR_FAILED:
 961                 return "FAILED";
 962         case AST_CDR_BUSY:
 963                 return "BUSY";
 964         case AST_CDR_ANSWERED:
 965                 return "ANSWERED";
 966         }
 967         return "UNKNOWN";
 968 }
 969
 970 /*! Converts AMA flag to printable string */
 971 char *ast_cdr_flags2str(int flag)
 972 {
 973         switch (flag) {
 974         case AST_CDR_OMIT:
 975                 return "OMIT";
 976         case AST_CDR_BILLING:
 977                 return "BILLING";
 978         case AST_CDR_DOCUMENTATION:
 979                 return "DOCUMENTATION";
 980         }
 981         return "Unknown";
 982 }
 983
 984 int ast_cdr_setaccount(struct ast_channel *chan, const char *account)
 985 {
 986         struct ast_cdr *cdr = chan->cdr;
 987         const char *old_acct = "";
 988
 989         if (!ast_strlen_zero(chan->accountcode)) {
 990                 old_acct = ast_strdupa(chan->accountcode);
 991         }
 992
 993         ast_string_field_set(chan, accountcode, account);
 994         for ( ; cdr ; cdr = cdr->next) {
 995                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
 996                         ast_copy_string(cdr->accountcode, chan->accountcode, sizeof(cdr->accountcode));
 997                 }
 998         }
 999
1000         ast_manager_event(chan, EVENT_FLAG_CALL, "NewAccountCode",
1001                         "Channel: %s\r\n"
1002                         "Uniqueid: %s\r\n"
1003                         "AccountCode: %s\r\n"
1004                         "OldAccountCode: %s\r\n",
1005                         chan->name, chan->uniqueid, chan->accountcode, old_acct);
1006
1007         return 0;
1008 }
1009
1010 int ast_cdr_setpeeraccount(struct ast_channel *chan, const char *account)
1011 {
1012         struct ast_cdr *cdr = chan->cdr;
1013         const char *old_acct = "";
1014
1015         if (!ast_strlen_zero(chan->peeraccount)) {
1016                 old_acct = ast_strdupa(chan->peeraccount);
1017         }
1018
1019         ast_string_field_set(chan, peeraccount, account);
1020         for ( ; cdr ; cdr = cdr->next) {
1021                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
1022                         ast_copy_string(cdr->peeraccount, chan->peeraccount, sizeof(cdr->peeraccount));
1023                 }
1024         }
1025
1026         ast_manager_event(chan, EVENT_FLAG_CALL, "NewPeerAccount",
1027                         "Channel: %s\r\n"
1028                         "Uniqueid: %s\r\n"
1029                         "PeerAccount: %s\r\n"
1030                         "OldPeerAccount: %s\r\n",
1031                         chan->name, chan->uniqueid, chan->peeraccount, old_acct);
1032
1033         return 0;
1034 }
1035
1036 int ast_cdr_setamaflags(struct ast_channel *chan, const char *flag)
1037 {
1038         struct ast_cdr *cdr;
1039         int newflag = ast_cdr_amaflags2int(flag);
1040         if (newflag) {
1041                 for (cdr = chan->cdr; cdr; cdr = cdr->next) {
1042                         if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
1043                                 cdr->amaflags = newflag;
1044                         }
1045                 }
1046         }
1047
1048         return 0;
1049 }
1050
1051 int ast_cdr_setuserfield(struct ast_channel *chan, const char *userfield)
1052 {
1053         struct ast_cdr *cdr = chan->cdr;
1054
1055         for ( ; cdr ; cdr = cdr->next) {
1056                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
1057                         ast_copy_string(cdr->userfield, userfield, sizeof(cdr->userfield));
1058         }
1059
1060         return 0;
1061 }
1062
1063 int ast_cdr_appenduserfield(struct ast_channel *chan, const char *userfield)
1064 {
1065         struct ast_cdr *cdr = chan->cdr;
1066
1067         for ( ; cdr ; cdr = cdr->next) {
1068                 int len = strlen(cdr->userfield);
1069
1070                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
1071                         ast_copy_string(cdr->userfield + len, userfield, sizeof(cdr->userfield) - len);
1072         }
1073
1074         return 0;
1075 }
1076
1077 int ast_cdr_update(struct ast_channel *c)
1078 {
1079         struct ast_cdr *cdr = c->cdr;
1080
1081         for ( ; cdr ; cdr = cdr->next) {
1082                 if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
1083                         set_one_cid(cdr, c);
1084
1085                         /* Copy account code et-al */
1086                         ast_copy_string(cdr->accountcode, c->accountcode, sizeof(cdr->accountcode));
1087                         ast_copy_string(cdr->peeraccount, c->peeraccount, sizeof(cdr->peeraccount));
1088                         ast_copy_string(cdr->linkedid, c->linkedid, sizeof(cdr->linkedid));
1089
1090                         /* Destination information */ /* XXX privilege macro* ? */
1091                         ast_copy_string(cdr->dst, S_OR(c->macroexten, c->exten), sizeof(cdr->dst));
1092                         ast_copy_string(cdr->dcontext, S_OR(c->macrocontext, c->context), sizeof(cdr->dcontext));
1093                 }
1094         }
1095
1096         return 0;
1097 }
1098
1099 int ast_cdr_amaflags2int(const char *flag)
1100 {
1101         if (!strcasecmp(flag, "default"))
1102                 return 0;
1103         if (!strcasecmp(flag, "omit"))
1104                 return AST_CDR_OMIT;
1105         if (!strcasecmp(flag, "billing"))
1106                 return AST_CDR_BILLING;
1107         if (!strcasecmp(flag, "documentation"))
1108                 return AST_CDR_DOCUMENTATION;
1109         return -1;
1110 }
1111
1112 static void post_cdr(struct ast_cdr *cdr)
1113 {
1114         char *chan;
1115         struct ast_cdr_beitem *i;
1116
1117         for ( ; cdr ; cdr = cdr->next) {
1118                 if (!unanswered && cdr->disposition < AST_CDR_ANSWERED && (ast_strlen_zero(cdr->channel) || ast_strlen_zero(cdr->dstchannel))) {
1119                         /* For people, who don't want to see unanswered single-channel events */
1120                         ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1121                         continue;
1122                 }
1123
1124                 /* don't post CDRs that are for dialed channels unless those
1125                  * channels were originated from asterisk (pbx_spool, manager,
1126                  * cli) */
1127                 if (ast_test_flag(cdr, AST_CDR_FLAG_DIALED) && !ast_test_flag(cdr, AST_CDR_FLAG_ORIGINATED)) {
1128                         ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1129                         continue;
1130                 }
1131
1132                 chan = S_OR(cdr->channel, "<unknown>");
1133                 check_post(cdr);
1134                 ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
1135                 if (ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED))
1136                         continue;
1137                 AST_RWLIST_RDLOCK(&be_list);
1138                 AST_RWLIST_TRAVERSE(&be_list, i, list) {
1139                         i->be(cdr);
1140                 }
1141                 AST_RWLIST_UNLOCK(&be_list);
1142         }
1143 }
1144
1145 void ast_cdr_reset(struct ast_cdr *cdr, struct ast_flags *_flags)
1146 {
1147         struct ast_cdr *duplicate;
1148         struct ast_flags flags = { 0 };
1149
1150         if (_flags)
1151                 ast_copy_flags(&flags, _flags, AST_FLAGS_ALL);
1152
1153         for ( ; cdr ; cdr = cdr->next) {
1154                 /* Detach if post is requested */
1155                 if (ast_test_flag(&flags, AST_CDR_FLAG_LOCKED) || !ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
1156                         if (ast_test_flag(&flags, AST_CDR_FLAG_POSTED)) {
1157                                 ast_cdr_end(cdr);
1158                                 if ((duplicate = ast_cdr_dup_unique_swap(cdr))) {
1159                                         ast_cdr_detach(duplicate);
1160                                 }
1161                                 ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
1162                         }
1163
1164                         /* enable CDR only */
1165                         if (ast_test_flag(&flags, AST_CDR_FLAG_POST_ENABLE)) {
1166                                 ast_clear_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1167                                 continue;
1168                         }
1169
1170                         /* clear variables */
1171                         if (!ast_test_flag(&flags, AST_CDR_FLAG_KEEP_VARS)) {
1172                                 ast_cdr_free_vars(cdr, 0);
1173                         }
1174
1175                         /* Reset to initial state */
1176                         ast_clear_flag(cdr, AST_FLAGS_ALL);
1177                         memset(&cdr->start, 0, sizeof(cdr->start));
1178                         memset(&cdr->end, 0, sizeof(cdr->end));
1179                         memset(&cdr->answer, 0, sizeof(cdr->answer));
1180                         cdr->billsec = 0;
1181                         cdr->duration = 0;
1182                         ast_cdr_start(cdr);
1183                         cdr->disposition = AST_CDR_NOANSWER;
1184                 }
1185         }
1186 }
1187
1188 void ast_cdr_specialized_reset(struct ast_cdr *cdr, struct ast_flags *_flags)
1189 {
1190         struct ast_flags flags = { 0 };
1191
1192         if (_flags)
1193                 ast_copy_flags(&flags, _flags, AST_FLAGS_ALL);
1194
1195         /* Reset to initial state */
1196         if (ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED)) { /* But do NOT lose the NoCDR() setting */
1197                 ast_clear_flag(cdr, AST_FLAGS_ALL);
1198                 ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1199         } else {
1200                 ast_clear_flag(cdr, AST_FLAGS_ALL);
1201         }
1202
1203         memset(&cdr->start, 0, sizeof(cdr->start));
1204         memset(&cdr->end, 0, sizeof(cdr->end));
1205         memset(&cdr->answer, 0, sizeof(cdr->answer));
1206         cdr->billsec = 0;
1207         cdr->duration = 0;
1208         ast_cdr_start(cdr);
1209         cdr->disposition = AST_CDR_NULL;
1210 }
1211
1212 struct ast_cdr *ast_cdr_append(struct ast_cdr *cdr, struct ast_cdr *newcdr)
1213 {
1214         struct ast_cdr *ret;
1215
1216         if (cdr) {
1217                 ret = cdr;
1218
1219                 while (cdr->next)
1220                         cdr = cdr->next;
1221                 cdr->next = newcdr;
1222         } else {
1223                 ret = newcdr;
1224         }
1225
1226         return ret;
1227 }
1228
1229 /*! \note Don't call without cdr_batch_lock */
1230 static void reset_batch(void)
1231 {
1232         batch->size = 0;
1233         batch->head = NULL;
1234         batch->tail = NULL;
1235 }
1236
1237 /*! \note Don't call without cdr_batch_lock */
1238 static int init_batch(void)
1239 {
1240         /* This is the single meta-batch used to keep track of all CDRs during the entire life of the program */
1241         if (!(batch = ast_malloc(sizeof(*batch))))
1242                 return -1;
1243
1244         reset_batch();
1245
1246         return 0;
1247 }
1248
1249 static void *do_batch_backend_process(void *data)
1250 {
1251         struct ast_cdr_batch_item *processeditem;
1252         struct ast_cdr_batch_item *batchitem = data;
1253
1254         /* Push each CDR into storage mechanism(s) and free all the memory */
1255         while (batchitem) {
1256                 post_cdr(batchitem->cdr);
1257                 ast_cdr_free(batchitem->cdr);
1258                 processeditem = batchitem;
1259                 batchitem = batchitem->next;
1260                 ast_free(processeditem);
1261         }
1262
1263         return NULL;
1264 }
1265
1266 void ast_cdr_submit_batch(int do_shutdown)
1267 {
1268         struct ast_cdr_batch_item *oldbatchitems = NULL;
1269         pthread_t batch_post_thread = AST_PTHREADT_NULL;
1270
1271         /* if there's no batch, or no CDRs in the batch, then there's nothing to do */
1272         if (!batch || !batch->head)
1273                 return;
1274
1275         /* move the old CDRs aside, and prepare a new CDR batch */
1276         ast_mutex_lock(&cdr_batch_lock);
1277         oldbatchitems = batch->head;
1278         reset_batch();
1279         ast_mutex_unlock(&cdr_batch_lock);
1280
1281         /* if configured, spawn a new thread to post these CDRs,
1282            also try to save as much as possible if we are shutting down safely */
1283         if (batchscheduleronly || do_shutdown) {
1284                 ast_debug(1, "CDR single-threaded batch processing begins now\n");
1285                 do_batch_backend_process(oldbatchitems);
1286         } else {
1287                 if (ast_pthread_create_detached_background(&batch_post_thread, NULL, do_batch_backend_process, oldbatchitems)) {
1288                         ast_log(LOG_WARNING, "CDR processing thread could not detach, now trying in this thread\n");
1289                         do_batch_backend_process(oldbatchitems);
1290                 } else {
1291                         ast_debug(1, "CDR multi-threaded batch processing begins now\n");
1292                 }
1293         }
1294 }
1295
1296 static int submit_scheduled_batch(const void *data)
1297 {
1298         ast_cdr_submit_batch(0);
1299         /* manually reschedule from this point in time */
1300         cdr_sched = ast_sched_add(sched, batchtime * 1000, submit_scheduled_batch, NULL);
1301         /* returning zero so the scheduler does not automatically reschedule */
1302         return 0;
1303 }
1304
1305 static void submit_unscheduled_batch(void)
1306 {
1307         /* this is okay since we are not being called from within the scheduler */
1308         AST_SCHED_DEL(sched, cdr_sched);
1309         /* schedule the submission to occur ASAP (1 ms) */
1310         cdr_sched = ast_sched_add(sched, 1, submit_scheduled_batch, NULL);
1311         /* signal the do_cdr thread to wakeup early and do some work (that lazy thread ;) */
1312         ast_mutex_lock(&cdr_pending_lock);
1313         ast_cond_signal(&cdr_pending_cond);
1314         ast_mutex_unlock(&cdr_pending_lock);
1315 }
1316
1317 void ast_cdr_detach(struct ast_cdr *cdr)
1318 {
1319         struct ast_cdr_batch_item *newtail;
1320         int curr;
1321
1322         if (!cdr)
1323                 return;
1324
1325         /* maybe they disabled CDR stuff completely, so just drop it */
1326         if (!enabled) {
1327                 ast_debug(1, "Dropping CDR !\n");
1328                 ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
1329                 ast_cdr_free(cdr);
1330                 return;
1331         }
1332
1333         /* post stuff immediately if we are not in batch mode, this is legacy behaviour */
1334         if (!batchmode) {
1335                 post_cdr(cdr);
1336                 ast_cdr_free(cdr);
1337                 return;
1338         }
1339
1340         /* otherwise, each CDR gets put into a batch list (at the end) */
1341         ast_debug(1, "CDR detaching from this thread\n");
1342
1343         /* we'll need a new tail for every CDR */
1344         if (!(newtail = ast_calloc(1, sizeof(*newtail)))) {
1345                 post_cdr(cdr);
1346                 ast_cdr_free(cdr);
1347                 return;
1348         }
1349
1350         /* don't traverse a whole list (just keep track of the tail) */
1351         ast_mutex_lock(&cdr_batch_lock);
1352         if (!batch)
1353                 init_batch();
1354         if (!batch->head) {
1355                 /* new batch is empty, so point the head at the new tail */
1356                 batch->head = newtail;
1357         } else {
1358                 /* already got a batch with something in it, so just append a new tail */
1359                 batch->tail->next = newtail;
1360         }
1361         newtail->cdr = cdr;
1362         batch->tail = newtail;
1363         curr = batch->size++;
1364         ast_mutex_unlock(&cdr_batch_lock);
1365
1366         /* if we have enough stuff to post, then do it */
1367         if (curr >= (batchsize - 1))
1368                 submit_unscheduled_batch();
1369 }
1370
1371 static void *do_cdr(void *data)
1372 {
1373         struct timespec timeout;
1374         int schedms;
1375         int numevents = 0;
1376
1377         for (;;) {
1378                 struct timeval now;
1379                 schedms = ast_sched_wait(sched);
1380                 /* this shouldn't happen, but provide a 1 second default just in case */
1381                 if (schedms <= 0)
1382                         schedms = 1000;
1383                 now = ast_tvadd(ast_tvnow(), ast_samp2tv(schedms, 1000));
1384                 timeout.tv_sec = now.tv_sec;
1385                 timeout.tv_nsec = now.tv_usec * 1000;
1386                 /* prevent stuff from clobbering cdr_pending_cond, then wait on signals sent to it until the timeout expires */
1387                 ast_mutex_lock(&cdr_pending_lock);
1388                 ast_cond_timedwait(&cdr_pending_cond, &cdr_pending_lock, &timeout);
1389                 numevents = ast_sched_runq(sched);
1390                 ast_mutex_unlock(&cdr_pending_lock);
1391                 ast_debug(2, "Processed %d scheduled CDR batches from the run queue\n", numevents);
1392         }
1393
1394         return NULL;
1395 }
1396
1397 static char *handle_cli_status(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1398 {
1399         struct ast_cdr_beitem *beitem=NULL;
1400         int cnt=0;
1401         long nextbatchtime=0;
1402
1403         switch (cmd) {
1404         case CLI_INIT:
1405                 e->command = "cdr show status";
1406                 e->usage =
1407                         "Usage: cdr show status\n"
1408                         "       Displays the Call Detail Record engine system status.\n";
1409                 return NULL;
1410         case CLI_GENERATE:
1411                 return NULL;
1412         }
1413
1414         if (a->argc > 3)
1415                 return CLI_SHOWUSAGE;
1416
1417         ast_cli(a->fd, "\n");
1418         ast_cli(a->fd, "Call Detail Record (CDR) settings\n");
1419         ast_cli(a->fd, "----------------------------------\n");
1420         ast_cli(a->fd, "  Logging:                    %s\n", enabled ? "Enabled" : "Disabled");
1421         ast_cli(a->fd, "  Mode:                       %s\n", batchmode ? "Batch" : "Simple");
1422         if (enabled) {
1423                 ast_cli(a->fd, "  Log unanswered calls:       %s\n\n", unanswered ? "Yes" : "No");
1424                 if (batchmode) {
1425                         ast_cli(a->fd, "* Batch Mode Settings\n");
1426                         ast_cli(a->fd, "  -------------------\n");
1427                         if (batch)
1428                                 cnt = batch->size;
1429                         if (cdr_sched > -1)
1430                                 nextbatchtime = ast_sched_when(sched, cdr_sched);
1431                         ast_cli(a->fd, "  Safe shutdown:              %s\n", batchsafeshutdown ? "Enabled" : "Disabled");
1432                         ast_cli(a->fd, "  Threading model:            %s\n", batchscheduleronly ? "Scheduler only" : "Scheduler plus separate threads");
1433                         ast_cli(a->fd, "  Current batch size:         %d record%s\n", cnt, ESS(cnt));
1434                         ast_cli(a->fd, "  Maximum batch size:         %d record%s\n", batchsize, ESS(batchsize));
1435                         ast_cli(a->fd, "  Maximum batch time:         %d second%s\n", batchtime, ESS(batchtime));
1436                         ast_cli(a->fd, "  Next batch processing time: %ld second%s\n\n", nextbatchtime, ESS(nextbatchtime));
1437                 }
1438                 ast_cli(a->fd, "* Registered Backends\n");
1439                 ast_cli(a->fd, "  -------------------\n");
1440                 AST_RWLIST_RDLOCK(&be_list);
1441                 if (AST_RWLIST_EMPTY(&be_list)) {
1442                         ast_cli(a->fd, "    (none)\n");
1443                 } else {
1444                         AST_RWLIST_TRAVERSE(&be_list, beitem, list) {
1445                                 ast_cli(a->fd, "    %s\n", beitem->name);
1446                         }
1447                 }
1448                 AST_RWLIST_UNLOCK(&be_list);
1449                 ast_cli(a->fd, "\n");
1450         }
1451
1452         return CLI_SUCCESS;
1453 }
1454
1455 static char *handle_cli_submit(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1456 {
1457         switch (cmd) {
1458         case CLI_INIT:
1459                 e->command = "cdr submit";
1460                 e->usage =
1461                         "Usage: cdr submit\n"
1462                         "       Posts all pending batched CDR data to the configured CDR backend engine modules.\n";
1463                 return NULL;
1464         case CLI_GENERATE:
1465                 return NULL;
1466         }
1467         if (a->argc > 2)
1468                 return CLI_SHOWUSAGE;
1469
1470         submit_unscheduled_batch();
1471         ast_cli(a->fd, "Submitted CDRs to backend engines for processing.  This may take a while.\n");
1472
1473         return CLI_SUCCESS;
1474 }
1475
1476 static struct ast_cli_entry cli_submit = AST_CLI_DEFINE(handle_cli_submit, "Posts all pending batched CDR data");
1477 static struct ast_cli_entry cli_status = AST_CLI_DEFINE(handle_cli_status, "Display the CDR status");
1478
1479 static int do_reload(int reload)
1480 {
1481         struct ast_config *config;
1482         const char *enabled_value;
1483         const char *unanswered_value;
1484         const char *batched_value;
1485         const char *scheduleronly_value;
1486         const char *batchsafeshutdown_value;
1487         const char *size_value;
1488         const char *time_value;
1489         const char *end_before_h_value;
1490         const char *initiatedseconds_value;
1491         int cfg_size;
1492         int cfg_time;
1493         int was_enabled;
1494         int was_batchmode;
1495         int res=0;
1496         struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
1497
1498         if ((config = ast_config_load2("cdr.conf", "cdr", config_flags)) == CONFIG_STATUS_FILEUNCHANGED)
1499                 return 0;
1500         if (config == CONFIG_STATUS_FILEMISSING || config == CONFIG_STATUS_FILEUNCHANGED || config == CONFIG_STATUS_FILEINVALID) {
1501                 return 0;
1502         }
1503
1504         ast_mutex_lock(&cdr_batch_lock);
1505
1506         batchsize = BATCH_SIZE_DEFAULT;
1507         batchtime = BATCH_TIME_DEFAULT;
1508         batchscheduleronly = BATCH_SCHEDULER_ONLY_DEFAULT;
1509         batchsafeshutdown = BATCH_SAFE_SHUTDOWN_DEFAULT;
1510         was_enabled = enabled;
1511         was_batchmode = batchmode;
1512         enabled = 1;
1513         batchmode = 0;
1514
1515         /* don't run the next scheduled CDR posting while reloading */
1516         AST_SCHED_DEL(sched, cdr_sched);
1517
1518         if (config) {
1519                 if ((enabled_value = ast_variable_retrieve(config, "general", "enable"))) {
1520                         enabled = ast_true(enabled_value);
1521                 }
1522                 if ((unanswered_value = ast_variable_retrieve(config, "general", "unanswered"))) {
1523                         unanswered = ast_true(unanswered_value);
1524                 }
1525                 if ((batched_value = ast_variable_retrieve(config, "general", "batch"))) {
1526                         batchmode = ast_true(batched_value);
1527                 }
1528                 if ((scheduleronly_value = ast_variable_retrieve(config, "general", "scheduleronly"))) {
1529                         batchscheduleronly = ast_true(scheduleronly_value);
1530                 }
1531                 if ((batchsafeshutdown_value = ast_variable_retrieve(config, "general", "safeshutdown"))) {
1532                         batchsafeshutdown = ast_true(batchsafeshutdown_value);
1533                 }
1534                 if ((size_value = ast_variable_retrieve(config, "general", "size"))) {
1535                         if (sscanf(size_value, "%30d", &cfg_size) < 1)
1536                                 ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", size_value);
1537                         else if (cfg_size < 0)
1538                                 ast_log(LOG_WARNING, "Invalid maximum batch size '%d' specified, using default\n", cfg_size);
1539                         else
1540                                 batchsize = cfg_size;
1541                 }
1542                 if ((time_value = ast_variable_retrieve(config, "general", "time"))) {
1543                         if (sscanf(time_value, "%30d", &cfg_time) < 1)
1544                                 ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", time_value);
1545                         else if (cfg_time < 0)
1546                                 ast_log(LOG_WARNING, "Invalid maximum batch time '%d' specified, using default\n", cfg_time);
1547                         else
1548                                 batchtime = cfg_time;
1549                 }
1550                 if ((end_before_h_value = ast_variable_retrieve(config, "general", "endbeforehexten")))
1551                         ast_set2_flag(&ast_options, ast_true(end_before_h_value), AST_OPT_FLAG_END_CDR_BEFORE_H_EXTEN);
1552                 if ((initiatedseconds_value = ast_variable_retrieve(config, "general", "initiatedseconds")))
1553                         ast_set2_flag(&ast_options, ast_true(initiatedseconds_value), AST_OPT_FLAG_INITIATED_SECONDS);
1554         }
1555
1556         if (enabled && !batchmode) {
1557                 ast_log(LOG_NOTICE, "CDR simple logging enabled.\n");
1558         } else if (enabled && batchmode) {
1559                 cdr_sched = ast_sched_add(sched, batchtime * 1000, submit_scheduled_batch, NULL);
1560                 ast_log(LOG_NOTICE, "CDR batch mode logging enabled, first of either size %d or time %d seconds.\n", batchsize, batchtime);
1561         } else {
1562                 ast_log(LOG_NOTICE, "CDR logging disabled, data will be lost.\n");
1563         }
1564
1565         /* if this reload enabled the CDR batch mode, create the background thread
1566            if it does not exist */
1567         if (enabled && batchmode && (!was_enabled || !was_batchmode) && (cdr_thread == AST_PTHREADT_NULL)) {
1568                 ast_cond_init(&cdr_pending_cond, NULL);
1569                 if (ast_pthread_create_background(&cdr_thread, NULL, do_cdr, NULL) < 0) {
1570                         ast_log(LOG_ERROR, "Unable to start CDR thread.\n");
1571                         AST_SCHED_DEL(sched, cdr_sched);
1572                 } else {
1573                         ast_cli_register(&cli_submit);
1574                         ast_register_atexit(ast_cdr_engine_term);
1575                         res = 0;
1576                 }
1577         /* if this reload disabled the CDR and/or batch mode and there is a background thread,
1578            kill it */
1579         } else if (((!enabled && was_enabled) || (!batchmode && was_batchmode)) && (cdr_thread != AST_PTHREADT_NULL)) {
1580                 /* wake up the thread so it will exit */
1581                 pthread_cancel(cdr_thread);
1582                 pthread_kill(cdr_thread, SIGURG);
1583                 pthread_join(cdr_thread, NULL);
1584                 cdr_thread = AST_PTHREADT_NULL;
1585                 ast_cond_destroy(&cdr_pending_cond);
1586                 ast_cli_unregister(&cli_submit);
1587                 ast_unregister_atexit(ast_cdr_engine_term);
1588                 res = 0;
1589                 /* if leaving batch mode, then post the CDRs in the batch,
1590                    and don't reschedule, since we are stopping CDR logging */
1591                 if (!batchmode && was_batchmode) {
1592                         ast_cdr_engine_term();
1593                 }
1594         } else {
1595                 res = 0;
1596         }
1597
1598         ast_mutex_unlock(&cdr_batch_lock);
1599         ast_config_destroy(config);
1600         manager_event(EVENT_FLAG_SYSTEM, "Reload", "Module: CDR\r\nMessage: CDR subsystem reload requested\r\n");
1601
1602         return res;
1603 }
1604
1605 int ast_cdr_engine_init(void)
1606 {
1607         int res;
1608
1609         sched = sched_context_create();
1610         if (!sched) {
1611                 ast_log(LOG_ERROR, "Unable to create schedule context.\n");
1612                 return -1;
1613         }
1614
1615         ast_cli_register(&cli_status);
1616
1617         res = do_reload(0);
1618         if (res) {
1619                 ast_mutex_lock(&cdr_batch_lock);
1620                 res = init_batch();
1621                 ast_mutex_unlock(&cdr_batch_lock);
1622         }
1623
1624         return res;
1625 }
1626
1627 /* \note This actually gets called a couple of times at shutdown.  Once, before we start
1628    hanging up channels, and then again, after the channel hangup timeout expires */
1629 void ast_cdr_engine_term(void)
1630 {
1631         ast_cdr_submit_batch(batchsafeshutdown);
1632 }
1633
1634 int ast_cdr_engine_reload(void)
1635 {
1636         return do_reload(1);
1637 }
1638
1639 int ast_cdr_data_add_structure(struct ast_data *tree, struct ast_cdr *cdr, int recur)
1640 {
1641         struct ast_cdr *tmpcdr;
1642         struct ast_data *level;
1643         struct ast_var_t *variables;
1644         const char *var, *val;
1645         int x = 1, i;
1646         char workspace[256];
1647         char *tmp;
1648
1649         if (!cdr) {
1650                 return -1;
1651         }
1652
1653         for (tmpcdr = cdr; tmpcdr; tmpcdr = (recur ? tmpcdr->next : NULL)) {
1654                 level = ast_data_add_node(tree, "level");
1655                 if (!level) {
1656                         continue;
1657                 }
1658
1659                 ast_data_add_int(level, "level_number", x);
1660
1661                 AST_LIST_TRAVERSE(&tmpcdr->varshead, variables, entries) {
1662                         if (variables && (var = ast_var_name(variables)) &&
1663                                         (val = ast_var_value(variables)) && !ast_strlen_zero(var)
1664                                         && !ast_strlen_zero(val)) {
1665                                 ast_data_add_str(level, var, val);
1666                         } else {
1667                                 break;
1668                         }
1669                 }
1670
1671                 for (i = 0; cdr_readonly_vars[i]; i++) {
1672                         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 */
1673                         ast_cdr_getvar(tmpcdr, cdr_readonly_vars[i], &tmp, workspace, sizeof(workspace), 0, 0);
1674                         if (!tmp) {
1675                                 continue;
1676                         }
1677                         ast_data_add_str(level, cdr_readonly_vars[i], tmp);
1678                 }
1679
1680                 x++;
1681         }
1682
1683         return 0;
1684 }
1685