Thu Oct 11 06:42:01 2012

Asterisk developer's documentation


cdr.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2006, Digium, Inc.
00005  *
00006  * Mark Spencer <markster@digium.com>
00007  *
00008  * See http://www.asterisk.org for more information about
00009  * the Asterisk project. Please do not directly contact
00010  * any of the maintainers of this project for assistance;
00011  * the project provides a web site, mailing lists and IRC
00012  * channels for your use.
00013  *
00014  * This program is free software, distributed under the terms of
00015  * the GNU General Public License Version 2. See the LICENSE file
00016  * at the top of the source tree.
00017  */
00018 
00019 /*! \file
00020  *
00021  * \brief Call Detail Record API 
00022  *
00023  * \author Mark Spencer <markster@digium.com>
00024  * 
00025  * \note Includes code and algorithms from the Zapata library.
00026  *
00027  * \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
00028  * through our fingers somehow.  If someone allocates a CDR, it must be completely handled normally
00029  * or a WARNING shall be logged, so that we can best keep track of any escape condition where the CDR
00030  * isn't properly generated and posted.
00031  */
00032 
00033 
00034 #include "asterisk.h"
00035 
00036 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 287114 $")
00037 
00038 #include <unistd.h>
00039 #include <stdlib.h>
00040 #include <string.h>
00041 #include <stdio.h>
00042 #include <signal.h>
00043 
00044 #include "asterisk/lock.h"
00045 #include "asterisk/channel.h"
00046 #include "asterisk/cdr.h"
00047 #include "asterisk/logger.h"
00048 #include "asterisk/callerid.h"
00049 #include "asterisk/causes.h"
00050 #include "asterisk/options.h"
00051 #include "asterisk/linkedlists.h"
00052 #include "asterisk/utils.h"
00053 #include "asterisk/sched.h"
00054 #include "asterisk/config.h"
00055 #include "asterisk/cli.h"
00056 #include "asterisk/stringfields.h"
00057 
00058 /*! Default AMA flag for billing records (CDR's) */
00059 int ast_default_amaflags = AST_CDR_DOCUMENTATION;
00060 char ast_default_accountcode[AST_MAX_ACCOUNT_CODE];
00061 
00062 struct ast_cdr_beitem {
00063    char name[20];
00064    char desc[80];
00065    ast_cdrbe be;
00066    AST_LIST_ENTRY(ast_cdr_beitem) list;
00067 };
00068 
00069 static AST_LIST_HEAD_STATIC(be_list, ast_cdr_beitem);
00070 
00071 struct ast_cdr_batch_item {
00072    struct ast_cdr *cdr;
00073    struct ast_cdr_batch_item *next;
00074 };
00075 
00076 static struct ast_cdr_batch {
00077    int size;
00078    struct ast_cdr_batch_item *head;
00079    struct ast_cdr_batch_item *tail;
00080 } *batch = NULL;
00081 
00082 static struct sched_context *sched;
00083 static int cdr_sched = -1;
00084 static pthread_t cdr_thread = AST_PTHREADT_NULL;
00085 
00086 #define BATCH_SIZE_DEFAULT 100
00087 #define BATCH_TIME_DEFAULT 300
00088 #define BATCH_SCHEDULER_ONLY_DEFAULT 0
00089 #define BATCH_SAFE_SHUTDOWN_DEFAULT 1
00090 
00091 static int enabled;     /*! Is the CDR subsystem enabled ? */
00092 static int unanswered;
00093 static int batchmode;
00094 static int batchsize;
00095 static int batchtime;
00096 static int batchscheduleronly;
00097 static int batchsafeshutdown;
00098 
00099 AST_MUTEX_DEFINE_STATIC(cdr_batch_lock);
00100 
00101 /* these are used to wake up the CDR thread when there's work to do */
00102 AST_MUTEX_DEFINE_STATIC(cdr_pending_lock);
00103 static ast_cond_t cdr_pending_cond;
00104 
00105 
00106 /*! Register a CDR driver. Each registered CDR driver generates a CDR 
00107    \return 0 on success, -1 on failure 
00108 */
00109 int ast_cdr_register(const char *name, const char *desc, ast_cdrbe be)
00110 {
00111    struct ast_cdr_beitem *i;
00112 
00113    if (!name)
00114       return -1;
00115    if (!be) {
00116       ast_log(LOG_WARNING, "CDR engine '%s' lacks backend\n", name);
00117       return -1;
00118    }
00119 
00120    AST_LIST_LOCK(&be_list);
00121    AST_LIST_TRAVERSE(&be_list, i, list) {
00122       if (!strcasecmp(name, i->name))
00123          break;
00124    }
00125    AST_LIST_UNLOCK(&be_list);
00126 
00127    if (i) {
00128       ast_log(LOG_WARNING, "Already have a CDR backend called '%s'\n", name);
00129       return -1;
00130    }
00131 
00132    if (!(i = ast_calloc(1, sizeof(*i))))  
00133       return -1;
00134 
00135    i->be = be;
00136    ast_copy_string(i->name, name, sizeof(i->name));
00137    ast_copy_string(i->desc, desc, sizeof(i->desc));
00138 
00139    AST_LIST_LOCK(&be_list);
00140    AST_LIST_INSERT_HEAD(&be_list, i, list);
00141    AST_LIST_UNLOCK(&be_list);
00142 
00143    return 0;
00144 }
00145 
00146 /*! unregister a CDR driver */
00147 void ast_cdr_unregister(const char *name)
00148 {
00149    struct ast_cdr_beitem *i = NULL;
00150 
00151    AST_LIST_LOCK(&be_list);
00152    AST_LIST_TRAVERSE_SAFE_BEGIN(&be_list, i, list) {
00153       if (!strcasecmp(name, i->name)) {
00154          AST_LIST_REMOVE_CURRENT(&be_list, list);
00155          if (option_verbose > 1)
00156             ast_verbose(VERBOSE_PREFIX_2 "Unregistered '%s' CDR backend\n", name);
00157          free(i);
00158          break;
00159       }
00160    }
00161    AST_LIST_TRAVERSE_SAFE_END;
00162    AST_LIST_UNLOCK(&be_list);
00163 }
00164 
00165 int ast_cdr_isset_unanswered(void)
00166 {
00167    return unanswered;
00168 }
00169 
00170 /*! Duplicate a CDR record 
00171    \returns Pointer to new CDR record
00172 */
00173 struct ast_cdr *ast_cdr_dup(struct ast_cdr *cdr) 
00174 {
00175    struct ast_cdr *newcdr;
00176    
00177    if (!cdr) /* don't die if we get a null cdr pointer */
00178       return NULL;
00179    newcdr = ast_cdr_alloc();
00180    if (!newcdr)
00181       return NULL;
00182 
00183    memcpy(newcdr, cdr, sizeof(*newcdr));
00184    /* The varshead is unusable, volatile even, after the memcpy so we take care of that here */
00185    memset(&newcdr->varshead, 0, sizeof(newcdr->varshead));
00186    ast_cdr_copy_vars(newcdr, cdr);
00187    newcdr->next = NULL;
00188 
00189    return newcdr;
00190 }
00191 
00192 static const char *ast_cdr_getvar_internal(struct ast_cdr *cdr, const char *name, int recur) 
00193 {
00194    if (ast_strlen_zero(name))
00195       return NULL;
00196 
00197    for (; cdr; cdr = recur ? cdr->next : NULL) {
00198       struct ast_var_t *variables;
00199       struct varshead *headp = &cdr->varshead;
00200       AST_LIST_TRAVERSE(headp, variables, entries) {
00201          if (!strcasecmp(name, ast_var_name(variables)))
00202             return ast_var_value(variables);
00203       }
00204    }
00205 
00206    return NULL;
00207 }
00208 
00209 static void cdr_get_tv(struct timeval tv, const char *fmt, char *buf, int bufsize)
00210 {
00211    if (fmt == NULL) {   /* raw mode */
00212       snprintf(buf, bufsize, "%ld.%06ld", (long)tv.tv_sec, (long)tv.tv_usec);
00213    } else {  
00214       time_t t = tv.tv_sec;
00215       if (t) {
00216          struct tm tm;
00217 
00218          ast_localtime(&t, &tm, NULL);
00219          strftime(buf, bufsize, fmt, &tm);
00220       }
00221    }
00222 }
00223 
00224 /*! CDR channel variable retrieval */
00225 void ast_cdr_getvar(struct ast_cdr *cdr, const char *name, char **ret, char *workspace, int workspacelen, int recur, int raw) 
00226 {
00227    const char *fmt = "%Y-%m-%d %T";
00228    const char *varbuf;
00229 
00230    if (!cdr)  /* don't die if the cdr is null */
00231       return;
00232 
00233    *ret = NULL;
00234    /* special vars (the ones from the struct ast_cdr when requested by name) 
00235       I'd almost say we should convert all the stringed vals to vars */
00236 
00237    if (!strcasecmp(name, "clid"))
00238       ast_copy_string(workspace, cdr->clid, workspacelen);
00239    else if (!strcasecmp(name, "src"))
00240       ast_copy_string(workspace, cdr->src, workspacelen);
00241    else if (!strcasecmp(name, "dst"))
00242       ast_copy_string(workspace, cdr->dst, workspacelen);
00243    else if (!strcasecmp(name, "dcontext"))
00244       ast_copy_string(workspace, cdr->dcontext, workspacelen);
00245    else if (!strcasecmp(name, "channel"))
00246       ast_copy_string(workspace, cdr->channel, workspacelen);
00247    else if (!strcasecmp(name, "dstchannel"))
00248       ast_copy_string(workspace, cdr->dstchannel, workspacelen);
00249    else if (!strcasecmp(name, "lastapp"))
00250       ast_copy_string(workspace, cdr->lastapp, workspacelen);
00251    else if (!strcasecmp(name, "lastdata"))
00252       ast_copy_string(workspace, cdr->lastdata, workspacelen);
00253    else if (!strcasecmp(name, "start"))
00254       cdr_get_tv(cdr->start, raw ? NULL : fmt, workspace, workspacelen);
00255    else if (!strcasecmp(name, "answer"))
00256       cdr_get_tv(cdr->answer, raw ? NULL : fmt, workspace, workspacelen);
00257    else if (!strcasecmp(name, "end"))
00258       cdr_get_tv(cdr->end, raw ? NULL : fmt, workspace, workspacelen);
00259    else if (!strcasecmp(name, "duration"))
00260       snprintf(workspace, workspacelen, "%ld", cdr->duration);
00261    else if (!strcasecmp(name, "billsec"))
00262       snprintf(workspace, workspacelen, "%ld", cdr->billsec);
00263    else if (!strcasecmp(name, "disposition")) {
00264       if (raw) {
00265          snprintf(workspace, workspacelen, "%ld", cdr->disposition);
00266       } else {
00267          ast_copy_string(workspace, ast_cdr_disp2str(cdr->disposition), workspacelen);
00268       }
00269    } else if (!strcasecmp(name, "amaflags")) {
00270       if (raw) {
00271          snprintf(workspace, workspacelen, "%ld", cdr->amaflags);
00272       } else {
00273          ast_copy_string(workspace, ast_cdr_flags2str(cdr->amaflags), workspacelen);
00274       }
00275    } else if (!strcasecmp(name, "accountcode"))
00276       ast_copy_string(workspace, cdr->accountcode, workspacelen);
00277    else if (!strcasecmp(name, "uniqueid"))
00278       ast_copy_string(workspace, cdr->uniqueid, workspacelen);
00279    else if (!strcasecmp(name, "userfield"))
00280       ast_copy_string(workspace, cdr->userfield, workspacelen);
00281    else if ((varbuf = ast_cdr_getvar_internal(cdr, name, recur)))
00282       ast_copy_string(workspace, varbuf, workspacelen);
00283    else
00284       workspace[0] = '\0';
00285 
00286    if (!ast_strlen_zero(workspace))
00287       *ret = workspace;
00288 }
00289 
00290 /* readonly cdr variables */
00291 static   const char *cdr_readonly_vars[] = { "clid", "src", "dst", "dcontext", "channel", "dstchannel",
00292                 "lastapp", "lastdata", "start", "answer", "end", "duration",
00293                 "billsec", "disposition", "amaflags", "accountcode", "uniqueid",
00294                 "userfield", NULL };
00295 /*! Set a CDR channel variable 
00296    \note You can't set the CDR variables that belong to the actual CDR record, like "billsec".
00297 */
00298 int ast_cdr_setvar(struct ast_cdr *cdr, const char *name, const char *value, int recur) 
00299 {
00300    struct ast_var_t *newvariable;
00301    struct varshead *headp;
00302    int x;
00303    
00304    if (!cdr)  /* don't die if the cdr is null */
00305       return -1;
00306    
00307    for(x = 0; cdr_readonly_vars[x]; x++) {
00308       if (!strcasecmp(name, cdr_readonly_vars[x])) {
00309          ast_log(LOG_ERROR, "Attempt to set the '%s' read-only variable!.\n", name);
00310          return -1;
00311       }
00312    }
00313 
00314    if (!cdr) {
00315       ast_log(LOG_ERROR, "Attempt to set a variable on a nonexistent CDR record.\n");
00316       return -1;
00317    }
00318 
00319    for (; cdr; cdr = recur ? cdr->next : NULL) {
00320       if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00321          continue;
00322       headp = &cdr->varshead;
00323       AST_LIST_TRAVERSE_SAFE_BEGIN(headp, newvariable, entries) {
00324          if (!strcasecmp(ast_var_name(newvariable), name)) {
00325             /* there is already such a variable, delete it */
00326             AST_LIST_REMOVE_CURRENT(headp, entries);
00327             ast_var_delete(newvariable);
00328             break;
00329          }
00330       }
00331       AST_LIST_TRAVERSE_SAFE_END;
00332       
00333       if (value) {
00334          newvariable = ast_var_assign(name, value);
00335          AST_LIST_INSERT_HEAD(headp, newvariable, entries);
00336       }
00337    }
00338 
00339    return 0;
00340 }
00341 
00342 int ast_cdr_copy_vars(struct ast_cdr *to_cdr, struct ast_cdr *from_cdr)
00343 {
00344    struct ast_var_t *variables, *newvariable = NULL;
00345    struct varshead *headpa, *headpb;
00346    const char *var, *val;
00347    int x = 0;
00348 
00349    if (!to_cdr || !from_cdr) /* don't die if one of the pointers is null */
00350       return 0;
00351 
00352    headpa = &from_cdr->varshead;
00353    headpb = &to_cdr->varshead;
00354 
00355    AST_LIST_TRAVERSE(headpa,variables,entries) {
00356       if (variables &&
00357           (var = ast_var_name(variables)) && (val = ast_var_value(variables)) &&
00358           !ast_strlen_zero(var) && !ast_strlen_zero(val)) {
00359          newvariable = ast_var_assign(var, val);
00360          AST_LIST_INSERT_HEAD(headpb, newvariable, entries);
00361          x++;
00362       }
00363    }
00364 
00365    return x;
00366 }
00367 
00368 int ast_cdr_serialize_variables(struct ast_cdr *cdr, char *buf, size_t size, char delim, char sep, int recur) 
00369 {
00370    struct ast_var_t *variables;
00371    const char *var;
00372    char *tmp;
00373    char workspace[256];
00374    int total = 0, x = 0, i;
00375 
00376    memset(buf, 0, size);
00377 
00378    for (; cdr; cdr = recur ? cdr->next : NULL) {
00379       if (++x > 1)
00380          ast_build_string(&buf, &size, "\n");
00381 
00382       AST_LIST_TRAVERSE(&cdr->varshead, variables, entries) {
00383          if (!(var = ast_var_name(variables))) {
00384             continue;
00385          }
00386 
00387          if (ast_build_string(&buf, &size, "level %d: %s%c%s%c", x, var, delim, S_OR(ast_var_value(variables), ""), sep)) {
00388             ast_log(LOG_ERROR, "Data Buffer Size Exceeded!\n");
00389             break;
00390          }
00391 
00392          total++;
00393       }
00394 
00395       for (i = 0; cdr_readonly_vars[i]; i++) {
00396          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 */
00397          ast_cdr_getvar(cdr, cdr_readonly_vars[i], &tmp, workspace, sizeof(workspace), 0, 0);
00398          if (!tmp)
00399             continue;
00400          
00401          if (ast_build_string(&buf, &size, "level %d: %s%c%s%c", x, cdr_readonly_vars[i], delim, tmp, sep)) {
00402             ast_log(LOG_ERROR, "Data Buffer Size Exceeded!\n");
00403             break;
00404          } else
00405             total++;
00406       }
00407    }
00408 
00409    return total;
00410 }
00411 
00412 
00413 void ast_cdr_free_vars(struct ast_cdr *cdr, int recur)
00414 {
00415 
00416    /* clear variables */
00417    for (; cdr; cdr = recur ? cdr->next : NULL) {
00418       struct ast_var_t *vardata;
00419       struct varshead *headp = &cdr->varshead;
00420       while ((vardata = AST_LIST_REMOVE_HEAD(headp, entries)))
00421          ast_var_delete(vardata);
00422    }
00423 }
00424 
00425 /*! \brief  print a warning if cdr already posted */
00426 static void check_post(struct ast_cdr *cdr)
00427 {
00428    if (!cdr)
00429       return;
00430    if (ast_test_flag(cdr, AST_CDR_FLAG_POSTED))
00431       ast_log(LOG_NOTICE, "CDR on channel '%s' already posted\n", S_OR(cdr->channel, "<unknown>"));
00432 }
00433 
00434 void ast_cdr_free(struct ast_cdr *cdr)
00435 {
00436 
00437    while (cdr) {
00438       struct ast_cdr *next = cdr->next;
00439       char *chan = S_OR(cdr->channel, "<unknown>");
00440       if (option_verbose > 1 && !ast_test_flag(cdr, AST_CDR_FLAG_POSTED) && !ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED))
00441          ast_verbose(VERBOSE_PREFIX_2 "CDR on channel '%s' not posted\n", chan);
00442       if (option_verbose > 1 && ast_tvzero(cdr->end))
00443          ast_verbose(VERBOSE_PREFIX_2 "CDR on channel '%s' lacks end\n", chan);
00444       if (option_verbose > 1 && ast_tvzero(cdr->start))
00445          ast_verbose(VERBOSE_PREFIX_2 "CDR on channel '%s' lacks start\n", chan);
00446 
00447       ast_cdr_free_vars(cdr, 0);
00448       free(cdr);
00449       cdr = next;
00450    }
00451 }
00452 
00453 /*! \brief the same as a cdr_free call, only with no checks; just get rid of it */
00454 void ast_cdr_discard(struct ast_cdr *cdr)
00455 {
00456    while (cdr) {
00457       struct ast_cdr *next = cdr->next;
00458 
00459       ast_cdr_free_vars(cdr, 0);
00460       free(cdr);
00461       cdr = next;
00462    }
00463 }
00464 
00465 struct ast_cdr *ast_cdr_alloc(void)
00466 {
00467    struct ast_cdr *x = ast_calloc(1, sizeof(struct ast_cdr));
00468    if (!x)
00469       ast_log(LOG_ERROR,"Allocation Failure for a CDR!\n");
00470    return x;
00471 }
00472 
00473 static void cdr_merge_vars(struct ast_cdr *to, struct ast_cdr *from)
00474 {
00475    struct ast_var_t *variablesfrom,*variablesto;
00476    struct varshead *headpfrom = &to->varshead;
00477    struct varshead *headpto = &from->varshead;
00478    AST_LIST_TRAVERSE_SAFE_BEGIN(headpfrom, variablesfrom, entries) {
00479       /* for every var in from, stick it in to */
00480       const char *fromvarname = NULL, *fromvarval = NULL;
00481       const char *tovarname = NULL, *tovarval = NULL;
00482       fromvarname = ast_var_name(variablesfrom);
00483       fromvarval = ast_var_value(variablesfrom);
00484       tovarname = 0;
00485 
00486       /* now, quick see if that var is in the 'to' cdr already */
00487       AST_LIST_TRAVERSE(headpto, variablesto, entries) {
00488 
00489          /* now, quick see if that var is in the 'to' cdr already */
00490          if ( strcasecmp(fromvarname, ast_var_name(variablesto)) == 0 ) {
00491             tovarname = ast_var_name(variablesto);
00492             tovarval = ast_var_value(variablesto);
00493             break;
00494          }
00495       }
00496       if (tovarname && strcasecmp(fromvarval,tovarval) != 0) {  /* this message here to see how irritating the userbase finds it */
00497          ast_log(LOG_NOTICE, "Merging CDR's: variable %s value %s dropped in favor of value %s\n", tovarname, fromvarval, tovarval);
00498          continue;
00499       } else if (tovarname && strcasecmp(fromvarval,tovarval) == 0) /* if they are the same, the job is done */
00500          continue;
00501 
00502       /*rip this var out of the from cdr, and stick it in the to cdr */
00503       AST_LIST_REMOVE_CURRENT(headpfrom, entries);
00504       AST_LIST_INSERT_HEAD(headpto, variablesfrom, entries);
00505    }
00506    AST_LIST_TRAVERSE_SAFE_END;
00507 }
00508 
00509 void ast_cdr_merge(struct ast_cdr *to, struct ast_cdr *from)
00510 {
00511    struct ast_cdr *zcdr;
00512    struct ast_cdr *lto = NULL;
00513    struct ast_cdr *lfrom = NULL;
00514    int discard_from = 0;
00515    
00516    if (!to || !from)
00517       return;
00518 
00519    /* don't merge into locked CDR's -- it's bad business */
00520    if (ast_test_flag(to, AST_CDR_FLAG_LOCKED)) {
00521       zcdr = to; /* safety valve? */
00522       while (to->next) {
00523          lto = to;
00524          to = to->next;
00525       }
00526       
00527       if (ast_test_flag(to, AST_CDR_FLAG_LOCKED)) {
00528          ast_log(LOG_WARNING, "Merging into locked CDR... no choice.");
00529          to = zcdr; /* safety-- if all there are is locked CDR's, then.... ?? */
00530          lto = NULL;
00531       }
00532    }
00533 
00534    if (ast_test_flag(from, AST_CDR_FLAG_LOCKED)) {
00535       discard_from = 1;
00536       if (lto) {
00537          struct ast_cdr *llfrom = NULL;
00538          /* insert the from stuff after lto */
00539          lto->next = from;
00540          lfrom = from;
00541          while (lfrom && lfrom->next) {
00542             if (!lfrom->next->next)
00543                llfrom = lfrom;
00544             lfrom = lfrom->next; 
00545          }
00546          /* rip off the last entry and put a copy of the to at the end */
00547          llfrom->next = to;
00548          from = lfrom;
00549       } else {
00550          /* save copy of the current *to cdr */
00551          struct ast_cdr tcdr;
00552          struct ast_cdr *llfrom = NULL;
00553          memcpy(&tcdr, to, sizeof(tcdr));
00554          /* copy in the locked from cdr */
00555          memcpy(to, from, sizeof(*to));
00556          lfrom = from;
00557          while (lfrom && lfrom->next) {
00558             if (!lfrom->next->next)
00559                llfrom = lfrom;
00560             lfrom = lfrom->next; 
00561          }
00562          from->next = NULL;
00563          /* rip off the last entry and put a copy of the to at the end */
00564          if (llfrom == from)
00565             to = to->next = ast_cdr_dup(&tcdr);
00566          else
00567             to = llfrom->next = ast_cdr_dup(&tcdr);
00568          from = lfrom;
00569       }
00570    }
00571    
00572    if (!ast_tvzero(from->start)) {
00573       if (!ast_tvzero(to->start)) {
00574          if (ast_tvcmp(to->start, from->start) > 0 ) {
00575             to->start = from->start; /* use the earliest time */
00576             from->start = ast_tv(0,0); /* we actively "steal" these values */
00577          }
00578          /* else nothing to do */
00579       } else {
00580          to->start = from->start;
00581          from->start = ast_tv(0,0); /* we actively "steal" these values */
00582       }
00583    }
00584    if (!ast_tvzero(from->answer)) {
00585       if (!ast_tvzero(to->answer)) {
00586          if (ast_tvcmp(to->answer, from->answer) > 0 ) {
00587             to->answer = from->answer; /* use the earliest time */
00588             from->answer = ast_tv(0,0); /* we actively "steal" these values */
00589          }
00590          /* we got the earliest answer time, so we'll settle for that? */
00591       } else {
00592          to->answer = from->answer;
00593          from->answer = ast_tv(0,0); /* we actively "steal" these values */
00594       }
00595    }
00596    if (!ast_tvzero(from->end)) {
00597       if (!ast_tvzero(to->end)) {
00598          if (ast_tvcmp(to->end, from->end) < 0 ) {
00599             to->end = from->end; /* use the latest time */
00600             from->end = ast_tv(0,0); /* we actively "steal" these values */
00601             to->duration = to->end.tv_sec - to->start.tv_sec;  /* don't forget to update the duration, billsec, when we set end */
00602             to->billsec = ast_tvzero(to->answer) ? 0 : to->end.tv_sec - to->answer.tv_sec;
00603          }
00604          /* else, nothing to do */
00605       } else {
00606          to->end = from->end;
00607          from->end = ast_tv(0,0); /* we actively "steal" these values */
00608          to->duration = to->end.tv_sec - to->start.tv_sec;
00609          to->billsec = ast_tvzero(to->answer) ? 0 : to->end.tv_sec - to->answer.tv_sec;
00610       }
00611    }
00612    if (to->disposition < from->disposition) {
00613       to->disposition = from->disposition;
00614       from->disposition = AST_CDR_NOANSWER;
00615    }
00616    if (ast_strlen_zero(to->lastapp) && !ast_strlen_zero(from->lastapp)) {
00617       ast_copy_string(to->lastapp, from->lastapp, sizeof(to->lastapp));
00618       from->lastapp[0] = 0; /* theft */
00619    }
00620    if (ast_strlen_zero(to->lastdata) && !ast_strlen_zero(from->lastdata)) {
00621       ast_copy_string(to->lastdata, from->lastdata, sizeof(to->lastdata));
00622       from->lastdata[0] = 0; /* theft */
00623    }
00624    if (ast_strlen_zero(to->dcontext) && !ast_strlen_zero(from->dcontext)) {
00625       ast_copy_string(to->dcontext, from->dcontext, sizeof(to->dcontext));
00626       from->dcontext[0] = 0; /* theft */
00627    }
00628    if (ast_strlen_zero(to->dstchannel) && !ast_strlen_zero(from->dstchannel)) {
00629       ast_copy_string(to->dstchannel, from->dstchannel, sizeof(to->dstchannel));
00630       from->dstchannel[0] = 0; /* theft */
00631    }
00632    if (!ast_strlen_zero(from->channel) && (ast_strlen_zero(to->channel) || !strncasecmp(from->channel, "Agent/", 6))) {
00633       ast_copy_string(to->channel, from->channel, sizeof(to->channel));
00634       from->channel[0] = 0; /* theft */
00635    }
00636    if (ast_strlen_zero(to->src) && !ast_strlen_zero(from->src)) {
00637       ast_copy_string(to->src, from->src, sizeof(to->src));
00638       from->src[0] = 0; /* theft */
00639    }
00640    if (ast_strlen_zero(to->clid) && !ast_strlen_zero(from->clid)) {
00641       ast_copy_string(to->clid, from->clid, sizeof(to->clid));
00642       from->clid[0] = 0; /* theft */
00643    }
00644    if (ast_strlen_zero(to->dst) && !ast_strlen_zero(from->dst)) {
00645       ast_copy_string(to->dst, from->dst, sizeof(to->dst));
00646       from->dst[0] = 0; /* theft */
00647    }
00648    if (!to->amaflags)
00649       to->amaflags = AST_CDR_DOCUMENTATION;
00650    if (!from->amaflags)
00651       from->amaflags = AST_CDR_DOCUMENTATION; /* make sure both amaflags are set to something (DOC is default) */
00652    if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (to->amaflags == AST_CDR_DOCUMENTATION && from->amaflags != AST_CDR_DOCUMENTATION)) {
00653       to->amaflags = from->amaflags;
00654    }
00655    if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->accountcode) && !ast_strlen_zero(from->accountcode))) {
00656       ast_copy_string(to->accountcode, from->accountcode, sizeof(to->accountcode));
00657    }
00658    if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->userfield) && !ast_strlen_zero(from->userfield))) {
00659       ast_copy_string(to->userfield, from->userfield, sizeof(to->userfield));
00660    }
00661    /* flags, varsead, ? */
00662    cdr_merge_vars(from, to);
00663 
00664    if (ast_test_flag(from, AST_CDR_FLAG_KEEP_VARS))
00665       ast_set_flag(to, AST_CDR_FLAG_KEEP_VARS);
00666    if (ast_test_flag(from, AST_CDR_FLAG_POSTED))
00667       ast_set_flag(to, AST_CDR_FLAG_POSTED);
00668    if (ast_test_flag(from, AST_CDR_FLAG_LOCKED))
00669       ast_set_flag(to, AST_CDR_FLAG_LOCKED);
00670    if (ast_test_flag(from, AST_CDR_FLAG_CHILD))
00671       ast_set_flag(to, AST_CDR_FLAG_CHILD);
00672    if (ast_test_flag(from, AST_CDR_FLAG_POST_DISABLED))
00673       ast_set_flag(to, AST_CDR_FLAG_POST_DISABLED);
00674 
00675    /* last, but not least, we need to merge any forked CDRs to the 'to' cdr */
00676    while (from->next) {
00677       /* just rip 'em off the 'from' and insert them on the 'to' */
00678       zcdr = from->next;
00679       from->next = zcdr->next;
00680       zcdr->next = NULL;
00681       /* zcdr is now ripped from the current list; */
00682       ast_cdr_append(to, zcdr);
00683    }
00684    if (discard_from)
00685       ast_cdr_discard(from);
00686 }
00687 
00688 void ast_cdr_start(struct ast_cdr *cdr)
00689 {
00690    char *chan; 
00691 
00692    for (; cdr; cdr = cdr->next) {
00693       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00694          chan = S_OR(cdr->channel, "<unknown>");
00695          check_post(cdr);
00696          cdr->start = ast_tvnow();
00697       }
00698    }
00699 }
00700 
00701 void ast_cdr_answer(struct ast_cdr *cdr)
00702 {
00703 
00704    for (; cdr; cdr = cdr->next) {
00705       if (ast_test_flag(cdr, AST_CDR_FLAG_ANSLOCKED)) 
00706          continue;
00707       if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00708          continue;
00709       check_post(cdr);
00710       if (cdr->disposition < AST_CDR_ANSWERED)
00711          cdr->disposition = AST_CDR_ANSWERED;
00712       if (ast_tvzero(cdr->answer))
00713          cdr->answer = ast_tvnow();
00714    }
00715 }
00716 
00717 void ast_cdr_busy(struct ast_cdr *cdr)
00718 {
00719 
00720    for (; cdr; cdr = cdr->next) {
00721       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00722          check_post(cdr);
00723          cdr->disposition = AST_CDR_BUSY;
00724       }
00725    }
00726 }
00727 
00728 void ast_cdr_failed(struct ast_cdr *cdr)
00729 {
00730    for (; cdr; cdr = cdr->next) {
00731       check_post(cdr);
00732       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00733          if (cdr->disposition < AST_CDR_FAILED)
00734             cdr->disposition = AST_CDR_FAILED;
00735       }
00736    }
00737 }
00738 
00739 void ast_cdr_noanswer(struct ast_cdr *cdr)
00740 {
00741    char *chan; 
00742 
00743    while (cdr) {
00744       chan = !ast_strlen_zero(cdr->channel) ? cdr->channel : "<unknown>";
00745       check_post(cdr);
00746       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00747          cdr->disposition = AST_CDR_NOANSWER;
00748       }
00749       cdr = cdr->next;
00750    }
00751 }
00752 
00753 /* everywhere ast_cdr_disposition is called, it will call ast_cdr_failed() 
00754    if ast_cdr_disposition returns a non-zero value */
00755 
00756 int ast_cdr_disposition(struct ast_cdr *cdr, int cause)
00757 {
00758    int res = 0;
00759 
00760    for (; cdr; cdr = cdr->next) {
00761       switch(cause) {  /* handle all the non failure, busy cases, return 0 not to set disposition,
00762                      return -1 to set disposition to FAILED */
00763       case AST_CAUSE_BUSY:
00764          ast_cdr_busy(cdr);
00765          break;
00766       case AST_CAUSE_NO_ANSWER:
00767          ast_cdr_noanswer(cdr);
00768          break;
00769       case AST_CAUSE_NORMAL:
00770          break;
00771       default:
00772          res = -1;
00773       }
00774    }
00775    return res;
00776 }
00777 
00778 void ast_cdr_setdestchan(struct ast_cdr *cdr, const char *chann)
00779 {
00780    for (; cdr; cdr = cdr->next) {
00781       check_post(cdr);
00782       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00783          ast_copy_string(cdr->dstchannel, chann, sizeof(cdr->dstchannel));
00784    }
00785 }
00786 
00787 void ast_cdr_setapp(struct ast_cdr *cdr, char *app, char *data)
00788 {
00789 
00790    for (; cdr; cdr = cdr->next) {
00791       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00792          check_post(cdr);
00793          ast_copy_string(cdr->lastapp, S_OR(app, ""), sizeof(cdr->lastapp));
00794          ast_copy_string(cdr->lastdata, S_OR(data, ""), sizeof(cdr->lastdata));
00795       }
00796    }
00797 }
00798 
00799 void ast_cdr_setanswer(struct ast_cdr *cdr, struct timeval t)
00800 {
00801 
00802    for (; cdr; cdr = cdr->next) {
00803       if (ast_test_flag(cdr, AST_CDR_FLAG_ANSLOCKED))
00804          continue;
00805       if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00806          continue;
00807       check_post(cdr);
00808       cdr->answer = t;
00809    }
00810 }
00811 
00812 void ast_cdr_setdisposition(struct ast_cdr *cdr, long int disposition)
00813 {
00814 
00815    for (; cdr; cdr = cdr->next) {
00816       if (ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00817          continue;
00818       check_post(cdr);
00819       cdr->disposition = disposition;
00820    }
00821 }
00822 
00823 /* set cid info for one record */
00824 static void set_one_cid(struct ast_cdr *cdr, struct ast_channel *c)
00825 {
00826    /* Grab source from ANI or normal Caller*ID */
00827    const char *num = S_OR(c->cid.cid_ani, c->cid.cid_num);
00828    if (!cdr)
00829       return;
00830    if (!ast_strlen_zero(c->cid.cid_name)) {
00831       if (!ast_strlen_zero(num)) /* both name and number */
00832          snprintf(cdr->clid, sizeof(cdr->clid), "\"%s\" <%s>", c->cid.cid_name, num);
00833       else           /* only name */
00834          ast_copy_string(cdr->clid, c->cid.cid_name, sizeof(cdr->clid));
00835    } else if (!ast_strlen_zero(num)) { /* only number */
00836       ast_copy_string(cdr->clid, num, sizeof(cdr->clid));
00837    } else {          /* nothing known */
00838       cdr->clid[0] = '\0';
00839    }
00840    ast_copy_string(cdr->src, S_OR(num, ""), sizeof(cdr->src));
00841    ast_cdr_setvar(cdr, "dnid", S_OR(c->cid.cid_dnid, ""), 0);
00842 
00843 }
00844 int ast_cdr_setcid(struct ast_cdr *cdr, struct ast_channel *c)
00845 {
00846    for (; cdr; cdr = cdr->next) {
00847       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00848          set_one_cid(cdr, c);
00849    }
00850    return 0;
00851 }
00852 
00853 int ast_cdr_init(struct ast_cdr *cdr, struct ast_channel *c)
00854 {
00855    char *chan;
00856 
00857    for ( ; cdr ; cdr = cdr->next) {
00858       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00859          chan = S_OR(cdr->channel, "<unknown>");
00860          ast_copy_string(cdr->channel, c->name, sizeof(cdr->channel));
00861          set_one_cid(cdr, c);
00862 
00863          cdr->disposition = (c->_state == AST_STATE_UP) ?  AST_CDR_ANSWERED : AST_CDR_NOANSWER;
00864          cdr->amaflags = c->amaflags ? c->amaflags :  ast_default_amaflags;
00865          ast_copy_string(cdr->accountcode, c->accountcode, sizeof(cdr->accountcode));
00866          /* Destination information */
00867          ast_copy_string(cdr->dst, S_OR(c->macroexten,c->exten), sizeof(cdr->dst));
00868          ast_copy_string(cdr->dcontext, S_OR(c->macrocontext,c->context), sizeof(cdr->dcontext));
00869          /* Unique call identifier */
00870          ast_copy_string(cdr->uniqueid, c->uniqueid, sizeof(cdr->uniqueid));
00871       }
00872    }
00873    return 0;
00874 }
00875 
00876 /* Three routines were "fixed" via 10668, and later shown that 
00877    users were depending on this behavior. ast_cdr_end,
00878    ast_cdr_setvar and ast_cdr_answer are the three routines.
00879    While most of the other routines would not touch 
00880    LOCKED cdr's, these three routines were designed to
00881    operate on locked CDR's as a matter of course.
00882    I now appreciate how this plays with the ForkCDR app,
00883    which forms these cdr chains in the first place. 
00884    cdr_end is pretty key: all cdrs created are closed
00885    together. They only vary by start time. Arithmetically,
00886    users can calculate the subintervals they wish to track. */
00887 
00888 void ast_cdr_end(struct ast_cdr *cdr)
00889 {
00890    for ( ; cdr ; cdr = cdr->next) {
00891       if (ast_test_flag(cdr, AST_CDR_FLAG_DONT_TOUCH) && ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00892          continue;
00893       check_post(cdr);
00894       if (ast_tvzero(cdr->end))
00895          cdr->end = ast_tvnow();
00896       if (ast_tvzero(cdr->start)) {
00897          ast_log(LOG_WARNING, "CDR on channel '%s' has not started\n", S_OR(cdr->channel, "<unknown>"));
00898          cdr->disposition = AST_CDR_FAILED;
00899       } else
00900          cdr->duration = cdr->end.tv_sec - cdr->start.tv_sec;
00901       if (ast_tvzero(cdr->answer)) {
00902          if (cdr->disposition == AST_CDR_ANSWERED) {
00903             ast_log(LOG_WARNING, "CDR on channel '%s' has no answer time but is 'ANSWERED'\n", S_OR(cdr->channel, "<unknown>"));
00904             cdr->disposition = AST_CDR_FAILED;
00905          }
00906       } else
00907          cdr->billsec = cdr->end.tv_sec - cdr->answer.tv_sec;
00908    }
00909 }
00910 
00911 char *ast_cdr_disp2str(int disposition)
00912 {
00913    switch (disposition) {
00914    case AST_CDR_NULL:
00915       return "NO ANSWER"; /* by default, for backward compatibility */
00916    case AST_CDR_NOANSWER:
00917       return "NO ANSWER";
00918    case AST_CDR_FAILED:
00919       return "FAILED";     
00920    case AST_CDR_BUSY:
00921       return "BUSY";    
00922    case AST_CDR_ANSWERED:
00923       return "ANSWERED";
00924    }
00925    return "UNKNOWN";
00926 }
00927 
00928 /*! Converts AMA flag to printable string */
00929 char *ast_cdr_flags2str(int flag)
00930 {
00931    switch(flag) {
00932    case AST_CDR_OMIT:
00933       return "OMIT";
00934    case AST_CDR_BILLING:
00935       return "BILLING";
00936    case AST_CDR_DOCUMENTATION:
00937       return "DOCUMENTATION";
00938    }
00939    return "Unknown";
00940 }
00941 
00942 int ast_cdr_setaccount(struct ast_channel *chan, const char *account)
00943 {
00944    struct ast_cdr *cdr = chan->cdr;
00945 
00946    ast_string_field_set(chan, accountcode, account);
00947    for ( ; cdr ; cdr = cdr->next) {
00948       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00949          ast_copy_string(cdr->accountcode, chan->accountcode, sizeof(cdr->accountcode));
00950       }
00951    }
00952    return 0;
00953 }
00954 
00955 int ast_cdr_setamaflags(struct ast_channel *chan, const char *flag)
00956 {
00957    struct ast_cdr *cdr;
00958    int newflag = ast_cdr_amaflags2int(flag);
00959    if (newflag) {
00960       for (cdr = chan->cdr; cdr; cdr = cdr->next) {
00961          if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00962             cdr->amaflags = newflag;
00963          }
00964       }
00965    }
00966 
00967    return 0;
00968 }
00969 
00970 int ast_cdr_setuserfield(struct ast_channel *chan, const char *userfield)
00971 {
00972    struct ast_cdr *cdr = chan->cdr;
00973 
00974    for ( ; cdr ; cdr = cdr->next) {
00975       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) 
00976          ast_copy_string(cdr->userfield, userfield, sizeof(cdr->userfield));
00977    }
00978 
00979    return 0;
00980 }
00981 
00982 int ast_cdr_appenduserfield(struct ast_channel *chan, const char *userfield)
00983 {
00984    struct ast_cdr *cdr = chan->cdr;
00985 
00986    for ( ; cdr ; cdr = cdr->next) {
00987       int len = strlen(cdr->userfield);
00988 
00989       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00990          ast_copy_string(cdr->userfield + len, userfield, sizeof(cdr->userfield) - len);
00991    }
00992 
00993    return 0;
00994 }
00995 
00996 int ast_cdr_update(struct ast_channel *c)
00997 {
00998    struct ast_cdr *cdr = c->cdr;
00999 
01000    for ( ; cdr ; cdr = cdr->next) {
01001       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
01002          set_one_cid(cdr, c);
01003 
01004          /* Copy account code et-al */ 
01005          ast_copy_string(cdr->accountcode, c->accountcode, sizeof(cdr->accountcode));
01006          
01007          /* Destination information */ /* XXX privilege macro* ? */
01008          ast_copy_string(cdr->dst, S_OR(c->macroexten, c->exten), sizeof(cdr->dst));
01009          ast_copy_string(cdr->dcontext, S_OR(c->macrocontext, c->context), sizeof(cdr->dcontext));
01010       }
01011    }
01012 
01013    return 0;
01014 }
01015 
01016 int ast_cdr_amaflags2int(const char *flag)
01017 {
01018    if (!strcasecmp(flag, "default"))
01019       return 0;
01020    if (!strcasecmp(flag, "omit"))
01021       return AST_CDR_OMIT;
01022    if (!strcasecmp(flag, "billing"))
01023       return AST_CDR_BILLING;
01024    if (!strcasecmp(flag, "documentation"))
01025       return AST_CDR_DOCUMENTATION;
01026    return -1;
01027 }
01028 
01029 static void post_cdr(struct ast_cdr *cdr)
01030 {
01031    char *chan;
01032    struct ast_cdr_beitem *i;
01033 
01034    for ( ; cdr ; cdr = cdr->next) {
01035       if (!unanswered && cdr->disposition < AST_CDR_ANSWERED && (ast_strlen_zero(cdr->channel) || ast_strlen_zero(cdr->dstchannel))) {
01036          /* For people, who don't want to see unanswered single-channel events */
01037          ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
01038          continue;
01039       }
01040 
01041       /* don't post CDRs that are for dialed channels unless those
01042        * channels were originated from asterisk (pbx_spool, manager,
01043        * cli) */
01044       if (ast_test_flag(cdr, AST_CDR_FLAG_DIALED) && !ast_test_flag(cdr, AST_CDR_FLAG_ORIGINATED)) {
01045          ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
01046          continue;
01047       }
01048 
01049       chan = S_OR(cdr->channel, "<unknown>");
01050       check_post(cdr);
01051       if (option_verbose > 1 && ast_tvzero(cdr->end))
01052          ast_verbose(VERBOSE_PREFIX_2 "CDR on channel '%s' lacks end\n", chan);
01053       if (option_verbose > 1 && ast_tvzero(cdr->start))
01054          ast_verbose(VERBOSE_PREFIX_2 "CDR on channel '%s' lacks start\n", chan);
01055       ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
01056       if (ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED))
01057          continue;
01058       AST_LIST_LOCK(&be_list);
01059       AST_LIST_TRAVERSE(&be_list, i, list) {
01060          i->be(cdr);
01061       }
01062       AST_LIST_UNLOCK(&be_list);
01063    }
01064 }
01065 
01066 void ast_cdr_reset(struct ast_cdr *cdr, struct ast_flags *_flags)
01067 {
01068    struct ast_cdr *dup;
01069    struct ast_flags flags = { 0 };
01070 
01071    if (_flags)
01072       ast_copy_flags(&flags, _flags, AST_FLAGS_ALL);
01073 
01074    for ( ; cdr ; cdr = cdr->next) {
01075       /* Detach if post is requested */
01076       if (ast_test_flag(&flags, AST_CDR_FLAG_LOCKED) || !ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
01077          if (ast_test_flag(&flags, AST_CDR_FLAG_POSTED)) {
01078             ast_cdr_end(cdr);
01079             if ((dup = ast_cdr_dup(cdr))) {
01080                ast_cdr_detach(dup);
01081             }
01082             ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
01083          }
01084 
01085          /* clear variables */
01086          if (!ast_test_flag(&flags, AST_CDR_FLAG_KEEP_VARS)) {
01087             ast_cdr_free_vars(cdr, 0);
01088          }
01089 
01090          /* Reset to initial state */
01091          ast_clear_flag(cdr, AST_FLAGS_ALL); 
01092          memset(&cdr->start, 0, sizeof(cdr->start));
01093          memset(&cdr->end, 0, sizeof(cdr->end));
01094          memset(&cdr->answer, 0, sizeof(cdr->answer));
01095          cdr->billsec = 0;
01096          cdr->duration = 0;
01097          ast_cdr_start(cdr);
01098          cdr->disposition = AST_CDR_NOANSWER;
01099       }
01100    }
01101 }
01102 
01103 void ast_cdr_specialized_reset(struct ast_cdr *cdr, struct ast_flags *_flags)
01104 {
01105    struct ast_flags flags = { 0 };
01106 
01107    if (_flags)
01108       ast_copy_flags(&flags, _flags, AST_FLAGS_ALL);
01109    
01110    /* Reset to initial state */
01111    if (ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED)) { /* But do NOT lose the NoCDR() setting */
01112       ast_clear_flag(cdr, AST_FLAGS_ALL); 
01113       ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
01114    } else {
01115       ast_clear_flag(cdr, AST_FLAGS_ALL); 
01116    }
01117    
01118    memset(&cdr->start, 0, sizeof(cdr->start));
01119    memset(&cdr->end, 0, sizeof(cdr->end));
01120    memset(&cdr->answer, 0, sizeof(cdr->answer));
01121    cdr->billsec = 0;
01122    cdr->duration = 0;
01123    ast_cdr_start(cdr);
01124    cdr->disposition = AST_CDR_NULL;
01125 }
01126 
01127 struct ast_cdr *ast_cdr_append(struct ast_cdr *cdr, struct ast_cdr *newcdr) 
01128 {
01129    struct ast_cdr *ret;
01130 
01131    if (cdr) {
01132       ret = cdr;
01133 
01134       while (cdr->next)
01135          cdr = cdr->next;
01136       cdr->next = newcdr;
01137    } else {
01138       ret = newcdr;
01139    }
01140 
01141    return ret;
01142 }
01143 
01144 /*! \note Don't call without cdr_batch_lock */
01145 static void reset_batch(void)
01146 {
01147    batch->size = 0;
01148    batch->head = NULL;
01149    batch->tail = NULL;
01150 }
01151 
01152 /*! \note Don't call without cdr_batch_lock */
01153 static int init_batch(void)
01154 {
01155    /* This is the single meta-batch used to keep track of all CDRs during the entire life of the program */
01156    if (!(batch = ast_malloc(sizeof(*batch))))
01157       return -1;
01158 
01159    reset_batch();
01160 
01161    return 0;
01162 }
01163 
01164 static void *do_batch_backend_process(void *data)
01165 {
01166    struct ast_cdr_batch_item *processeditem;
01167    struct ast_cdr_batch_item *batchitem = data;
01168 
01169    /* Push each CDR into storage mechanism(s) and free all the memory */
01170    while (batchitem) {
01171       post_cdr(batchitem->cdr);
01172       ast_cdr_free(batchitem->cdr);
01173       processeditem = batchitem;
01174       batchitem = batchitem->next;
01175       free(processeditem);
01176    }
01177 
01178    return NULL;
01179 }
01180 
01181 void ast_cdr_submit_batch(int shutdown)
01182 {
01183    struct ast_cdr_batch_item *oldbatchitems = NULL;
01184    pthread_attr_t attr;
01185    pthread_t batch_post_thread = AST_PTHREADT_NULL;
01186 
01187    /* if there's no batch, or no CDRs in the batch, then there's nothing to do */
01188    if (!batch || !batch->head)
01189       return;
01190 
01191    /* move the old CDRs aside, and prepare a new CDR batch */
01192    ast_mutex_lock(&cdr_batch_lock);
01193    oldbatchitems = batch->head;
01194    reset_batch();
01195    ast_mutex_unlock(&cdr_batch_lock);
01196 
01197    /* if configured, spawn a new thread to post these CDRs,
01198       also try to save as much as possible if we are shutting down safely */
01199    if (batchscheduleronly || shutdown) {
01200       if (option_debug)
01201          ast_log(LOG_DEBUG, "CDR single-threaded batch processing begins now\n");
01202       do_batch_backend_process(oldbatchitems);
01203    } else {
01204       pthread_attr_init(&attr);
01205       pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
01206       if (ast_pthread_create_background(&batch_post_thread, &attr, do_batch_backend_process, oldbatchitems)) {
01207          ast_log(LOG_WARNING, "CDR processing thread could not detach, now trying in this thread\n");
01208          do_batch_backend_process(oldbatchitems);
01209       } else {
01210          if (option_debug)
01211             ast_log(LOG_DEBUG, "CDR multi-threaded batch processing begins now\n");
01212       }
01213       pthread_attr_destroy(&attr);
01214    }
01215 }
01216 
01217 static int submit_scheduled_batch(const void *data)
01218 {
01219    ast_cdr_submit_batch(0);
01220    /* manually reschedule from this point in time */
01221    cdr_sched = ast_sched_add(sched, batchtime * 1000, submit_scheduled_batch, NULL);
01222    /* returning zero so the scheduler does not automatically reschedule */
01223    return 0;
01224 }
01225 
01226 static void submit_unscheduled_batch(void)
01227 {
01228    /* this is okay since we are not being called from within the scheduler */
01229    AST_SCHED_DEL(sched, cdr_sched);
01230    /* schedule the submission to occur ASAP (1 ms) */
01231    cdr_sched = ast_sched_add(sched, 1, submit_scheduled_batch, NULL);
01232    /* signal the do_cdr thread to wakeup early and do some work (that lazy thread ;) */
01233    ast_mutex_lock(&cdr_pending_lock);
01234    ast_cond_signal(&cdr_pending_cond);
01235    ast_mutex_unlock(&cdr_pending_lock);
01236 }
01237 
01238 void ast_cdr_detach(struct ast_cdr *cdr)
01239 {
01240    struct ast_cdr_batch_item *newtail;
01241    int curr;
01242 
01243    if (!cdr)
01244       return;
01245 
01246    /* maybe they disabled CDR stuff completely, so just drop it */
01247    if (!enabled) {
01248       if (option_debug)
01249          ast_log(LOG_DEBUG, "Dropping CDR !\n");
01250       ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
01251       ast_cdr_free(cdr);
01252       return;
01253    }
01254 
01255    /* post stuff immediately if we are not in batch mode, this is legacy behaviour */
01256    if (!batchmode) {
01257       post_cdr(cdr);
01258       ast_cdr_free(cdr);
01259       return;
01260    }
01261 
01262    /* otherwise, each CDR gets put into a batch list (at the end) */
01263    if (option_debug)
01264       ast_log(LOG_DEBUG, "CDR detaching from this thread\n");
01265 
01266    /* we'll need a new tail for every CDR */
01267    if (!(newtail = ast_calloc(1, sizeof(*newtail)))) {
01268       post_cdr(cdr);
01269       ast_cdr_free(cdr);
01270       return;
01271    }
01272 
01273    /* don't traverse a whole list (just keep track of the tail) */
01274    ast_mutex_lock(&cdr_batch_lock);
01275    if (!batch)
01276       init_batch();
01277    if (!batch->head) {
01278       /* new batch is empty, so point the head at the new tail */
01279       batch->head = newtail;
01280    } else {
01281       /* already got a batch with something in it, so just append a new tail */
01282       batch->tail->next = newtail;
01283    }
01284    newtail->cdr = cdr;
01285    batch->tail = newtail;
01286    curr = batch->size++;
01287    ast_mutex_unlock(&cdr_batch_lock);
01288 
01289    /* if we have enough stuff to post, then do it */
01290    if (curr >= (batchsize - 1))
01291       submit_unscheduled_batch();
01292 }
01293 
01294 static void *do_cdr(void *data)
01295 {
01296    struct timespec timeout;
01297    int schedms;
01298    int numevents = 0;
01299 
01300    for(;;) {
01301       struct timeval now;
01302       schedms = ast_sched_wait(sched);
01303       /* this shouldn't happen, but provide a 1 second default just in case */
01304       if (schedms <= 0)
01305          schedms = 1000;
01306       now = ast_tvadd(ast_tvnow(), ast_samp2tv(schedms, 1000));
01307       timeout.tv_sec = now.tv_sec;
01308       timeout.tv_nsec = now.tv_usec * 1000;
01309       /* prevent stuff from clobbering cdr_pending_cond, then wait on signals sent to it until the timeout expires */
01310       ast_mutex_lock(&cdr_pending_lock);
01311       ast_cond_timedwait(&cdr_pending_cond, &cdr_pending_lock, &timeout);
01312       numevents = ast_sched_runq(sched);
01313       ast_mutex_unlock(&cdr_pending_lock);
01314       if (option_debug > 1)
01315          ast_log(LOG_DEBUG, "Processed %d scheduled CDR batches from the run queue\n", numevents);
01316    }
01317 
01318    return NULL;
01319 }
01320 
01321 static int handle_cli_status(int fd, int argc, char *argv[])
01322 {
01323    struct ast_cdr_beitem *beitem=NULL;
01324    int cnt=0;
01325    long nextbatchtime=0;
01326 
01327    if (argc > 2)
01328       return RESULT_SHOWUSAGE;
01329 
01330    ast_cli(fd, "CDR logging: %s\n", enabled ? "enabled" : "disabled");
01331    ast_cli(fd, "CDR mode: %s\n", batchmode ? "batch" : "simple");
01332    if (enabled) {
01333       ast_cli(fd, "CDR output unanswered calls: %s\n", unanswered ? "yes" : "no");
01334       if (batchmode) {
01335          if (batch)
01336             cnt = batch->size;
01337          if (cdr_sched > -1)
01338             nextbatchtime = ast_sched_when(sched, cdr_sched);
01339          ast_cli(fd, "CDR safe shut down: %s\n", batchsafeshutdown ? "enabled" : "disabled");
01340          ast_cli(fd, "CDR batch threading model: %s\n", batchscheduleronly ? "scheduler only" : "scheduler plus separate threads");
01341          ast_cli(fd, "CDR current batch size: %d record%s\n", cnt, (cnt != 1) ? "s" : "");
01342          ast_cli(fd, "CDR maximum batch size: %d record%s\n", batchsize, (batchsize != 1) ? "s" : "");
01343          ast_cli(fd, "CDR maximum batch time: %d second%s\n", batchtime, (batchtime != 1) ? "s" : "");
01344          ast_cli(fd, "CDR next scheduled batch processing time: %ld second%s\n", nextbatchtime, (nextbatchtime != 1) ? "s" : "");
01345       }
01346       AST_LIST_LOCK(&be_list);
01347       AST_LIST_TRAVERSE(&be_list, beitem, list) {
01348          ast_cli(fd, "CDR registered backend: %s\n", beitem->name);
01349       }
01350       AST_LIST_UNLOCK(&be_list);
01351    }
01352 
01353    return 0;
01354 }
01355 
01356 static int handle_cli_submit(int fd, int argc, char *argv[])
01357 {
01358    if (argc > 2)
01359       return RESULT_SHOWUSAGE;
01360 
01361    submit_unscheduled_batch();
01362    ast_cli(fd, "Submitted CDRs to backend engines for processing.  This may take a while.\n");
01363 
01364    return 0;
01365 }
01366 
01367 static struct ast_cli_entry cli_submit = {
01368    { "cdr", "submit", NULL },
01369    handle_cli_submit, "Posts all pending batched CDR data",
01370    "Usage: cdr submit\n"
01371    "       Posts all pending batched CDR data to the configured CDR backend engine modules.\n"
01372 };
01373 
01374 static struct ast_cli_entry cli_status = {
01375    { "cdr", "status", NULL },
01376    handle_cli_status, "Display the CDR status",
01377    "Usage: cdr status\n"
01378    "  Displays the Call Detail Record engine system status.\n"
01379 };
01380 
01381 static int do_reload(void)
01382 {
01383    struct ast_config *config;
01384    const char *enabled_value;
01385    const char *unanswered_value;
01386    const char *batched_value;
01387    const char *scheduleronly_value;
01388    const char *batchsafeshutdown_value;
01389    const char *size_value;
01390    const char *time_value;
01391    const char *end_before_h_value;
01392    int cfg_size;
01393    int cfg_time;
01394    int was_enabled;
01395    int was_batchmode;
01396    int res=0;
01397 
01398    ast_mutex_lock(&cdr_batch_lock);
01399 
01400    batchsize = BATCH_SIZE_DEFAULT;
01401    batchtime = BATCH_TIME_DEFAULT;
01402    batchscheduleronly = BATCH_SCHEDULER_ONLY_DEFAULT;
01403    batchsafeshutdown = BATCH_SAFE_SHUTDOWN_DEFAULT;
01404    was_enabled = enabled;
01405    was_batchmode = batchmode;
01406    enabled = 1;
01407    batchmode = 0;
01408 
01409    /* don't run the next scheduled CDR posting while reloading */
01410    AST_SCHED_DEL(sched, cdr_sched);
01411 
01412    if ((config = ast_config_load("cdr.conf"))) {
01413       if ((enabled_value = ast_variable_retrieve(config, "general", "enable"))) {
01414          enabled = ast_true(enabled_value);
01415       }
01416       if ((unanswered_value = ast_variable_retrieve(config, "general", "unanswered"))) {
01417          unanswered = ast_true(unanswered_value);
01418       }
01419       if ((batched_value = ast_variable_retrieve(config, "general", "batch"))) {
01420          batchmode = ast_true(batched_value);
01421       }
01422       if ((scheduleronly_value = ast_variable_retrieve(config, "general", "scheduleronly"))) {
01423          batchscheduleronly = ast_true(scheduleronly_value);
01424       }
01425       if ((batchsafeshutdown_value = ast_variable_retrieve(config, "general", "safeshutdown"))) {
01426          batchsafeshutdown = ast_true(batchsafeshutdown_value);
01427       }
01428       if ((size_value = ast_variable_retrieve(config, "general", "size"))) {
01429          if (sscanf(size_value, "%30d", &cfg_size) < 1)
01430             ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", size_value);
01431          else if (cfg_size < 0)
01432             ast_log(LOG_WARNING, "Invalid maximum batch size '%d' specified, using default\n", cfg_size);
01433          else
01434             batchsize = cfg_size;
01435       }
01436       if ((time_value = ast_variable_retrieve(config, "general", "time"))) {
01437          if (sscanf(time_value, "%30d", &cfg_time) < 1)
01438             ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", time_value);
01439          else if (cfg_time < 0)
01440             ast_log(LOG_WARNING, "Invalid maximum batch time '%d' specified, using default\n", cfg_time);
01441          else
01442             batchtime = cfg_time;
01443       }
01444       if ((end_before_h_value = ast_variable_retrieve(config, "general", "endbeforehexten")))
01445          ast_set2_flag(&ast_options, ast_true(end_before_h_value), AST_OPT_FLAG_END_CDR_BEFORE_H_EXTEN);
01446    }
01447 
01448    if (enabled && !batchmode) {
01449       ast_log(LOG_NOTICE, "CDR simple logging enabled.\n");
01450    } else if (enabled && batchmode) {
01451       cdr_sched = ast_sched_add(sched, batchtime * 1000, submit_scheduled_batch, NULL);
01452       ast_log(LOG_NOTICE, "CDR batch mode logging enabled, first of either size %d or time %d seconds.\n", batchsize, batchtime);
01453    } else {
01454       ast_log(LOG_NOTICE, "CDR logging disabled, data will be lost.\n");
01455    }
01456 
01457    /* if this reload enabled the CDR batch mode, create the background thread
01458       if it does not exist */
01459    if (enabled && batchmode && (!was_enabled || !was_batchmode) && (cdr_thread == AST_PTHREADT_NULL)) {
01460       ast_cond_init(&cdr_pending_cond, NULL);
01461       if (ast_pthread_create_background(&cdr_thread, NULL, do_cdr, NULL) < 0) {
01462          ast_log(LOG_ERROR, "Unable to start CDR thread.\n");
01463          AST_SCHED_DEL(sched, cdr_sched);
01464       } else {
01465          ast_cli_register(&cli_submit);
01466          ast_register_atexit(ast_cdr_engine_term);
01467          res = 0;
01468       }
01469    /* if this reload disabled the CDR and/or batch mode and there is a background thread,
01470       kill it */
01471    } else if (((!enabled && was_enabled) || (!batchmode && was_batchmode)) && (cdr_thread != AST_PTHREADT_NULL)) {
01472       /* wake up the thread so it will exit */
01473       pthread_cancel(cdr_thread);
01474       pthread_kill(cdr_thread, SIGURG);
01475       pthread_join(cdr_thread, NULL);
01476       cdr_thread = AST_PTHREADT_NULL;
01477       ast_cond_destroy(&cdr_pending_cond);
01478       ast_cli_unregister(&cli_submit);
01479       ast_unregister_atexit(ast_cdr_engine_term);
01480       res = 0;
01481       /* if leaving batch mode, then post the CDRs in the batch,
01482          and don't reschedule, since we are stopping CDR logging */
01483       if (!batchmode && was_batchmode) {
01484          ast_cdr_engine_term();
01485       }
01486    } else {
01487       res = 0;
01488    }
01489 
01490    ast_mutex_unlock(&cdr_batch_lock);
01491    ast_config_destroy(config);
01492 
01493    return res;
01494 }
01495 
01496 int ast_cdr_engine_init(void)
01497 {
01498    int res;
01499 
01500    sched = sched_context_create();
01501    if (!sched) {
01502       ast_log(LOG_ERROR, "Unable to create schedule context.\n");
01503       return -1;
01504    }
01505 
01506    ast_cli_register(&cli_status);
01507 
01508    res = do_reload();
01509    if (res) {
01510       ast_mutex_lock(&cdr_batch_lock);
01511       res = init_batch();
01512       ast_mutex_unlock(&cdr_batch_lock);
01513    }
01514 
01515    return res;
01516 }
01517 
01518 /* \note This actually gets called a couple of times at shutdown.  Once, before we start
01519    hanging up channels, and then again, after the channel hangup timeout expires */
01520 void ast_cdr_engine_term(void)
01521 {
01522    ast_cdr_submit_batch(batchsafeshutdown);
01523 }
01524 
01525 int ast_cdr_engine_reload(void)
01526 {
01527    return do_reload();
01528 }
01529 

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