Thu Oct 8 21:57:20 2009

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: 118858 $")
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 /*! Duplicate a CDR record 
00166    \returns Pointer to new CDR record
00167 */
00168 struct ast_cdr *ast_cdr_dup(struct ast_cdr *cdr) 
00169 {
00170    struct ast_cdr *newcdr;
00171    
00172    if (!cdr) /* don't die if we get a null cdr pointer */
00173       return NULL;
00174    newcdr = ast_cdr_alloc();
00175    if (!newcdr)
00176       return NULL;
00177 
00178    memcpy(newcdr, cdr, sizeof(*newcdr));
00179    /* The varshead is unusable, volatile even, after the memcpy so we take care of that here */
00180    memset(&newcdr->varshead, 0, sizeof(newcdr->varshead));
00181    ast_cdr_copy_vars(newcdr, cdr);
00182    newcdr->next = NULL;
00183 
00184    return newcdr;
00185 }
00186 
00187 static const char *ast_cdr_getvar_internal(struct ast_cdr *cdr, const char *name, int recur) 
00188 {
00189    if (ast_strlen_zero(name))
00190       return NULL;
00191 
00192    for (; cdr; cdr = recur ? cdr->next : NULL) {
00193       struct ast_var_t *variables;
00194       struct varshead *headp = &cdr->varshead;
00195       AST_LIST_TRAVERSE(headp, variables, entries) {
00196          if (!strcasecmp(name, ast_var_name(variables)))
00197             return ast_var_value(variables);
00198       }
00199    }
00200 
00201    return NULL;
00202 }
00203 
00204 static void cdr_get_tv(struct timeval tv, const char *fmt, char *buf, int bufsize)
00205 {
00206    if (fmt == NULL) {   /* raw mode */
00207       snprintf(buf, bufsize, "%ld.%06ld", (long)tv.tv_sec, (long)tv.tv_usec);
00208    } else {  
00209       time_t t = tv.tv_sec;
00210       if (t) {
00211          struct tm tm;
00212 
00213          ast_localtime(&t, &tm, NULL);
00214          strftime(buf, bufsize, fmt, &tm);
00215       }
00216    }
00217 }
00218 
00219 /*! CDR channel variable retrieval */
00220 void ast_cdr_getvar(struct ast_cdr *cdr, const char *name, char **ret, char *workspace, int workspacelen, int recur, int raw) 
00221 {
00222    const char *fmt = "%Y-%m-%d %T";
00223    const char *varbuf;
00224 
00225    if (!cdr)  /* don't die if the cdr is null */
00226       return;
00227 
00228    *ret = NULL;
00229    /* special vars (the ones from the struct ast_cdr when requested by name) 
00230       I'd almost say we should convert all the stringed vals to vars */
00231 
00232    if (!strcasecmp(name, "clid"))
00233       ast_copy_string(workspace, cdr->clid, workspacelen);
00234    else if (!strcasecmp(name, "src"))
00235       ast_copy_string(workspace, cdr->src, workspacelen);
00236    else if (!strcasecmp(name, "dst"))
00237       ast_copy_string(workspace, cdr->dst, workspacelen);
00238    else if (!strcasecmp(name, "dcontext"))
00239       ast_copy_string(workspace, cdr->dcontext, workspacelen);
00240    else if (!strcasecmp(name, "channel"))
00241       ast_copy_string(workspace, cdr->channel, workspacelen);
00242    else if (!strcasecmp(name, "dstchannel"))
00243       ast_copy_string(workspace, cdr->dstchannel, workspacelen);
00244    else if (!strcasecmp(name, "lastapp"))
00245       ast_copy_string(workspace, cdr->lastapp, workspacelen);
00246    else if (!strcasecmp(name, "lastdata"))
00247       ast_copy_string(workspace, cdr->lastdata, workspacelen);
00248    else if (!strcasecmp(name, "start"))
00249       cdr_get_tv(cdr->start, raw ? NULL : fmt, workspace, workspacelen);
00250    else if (!strcasecmp(name, "answer"))
00251       cdr_get_tv(cdr->answer, raw ? NULL : fmt, workspace, workspacelen);
00252    else if (!strcasecmp(name, "end"))
00253       cdr_get_tv(cdr->end, raw ? NULL : fmt, workspace, workspacelen);
00254    else if (!strcasecmp(name, "duration"))
00255       snprintf(workspace, workspacelen, "%ld", cdr->duration);
00256    else if (!strcasecmp(name, "billsec"))
00257       snprintf(workspace, workspacelen, "%ld", cdr->billsec);
00258    else if (!strcasecmp(name, "disposition")) {
00259       if (raw) {
00260          snprintf(workspace, workspacelen, "%ld", cdr->disposition);
00261       } else {
00262          ast_copy_string(workspace, ast_cdr_disp2str(cdr->disposition), workspacelen);
00263       }
00264    } else if (!strcasecmp(name, "amaflags")) {
00265       if (raw) {
00266          snprintf(workspace, workspacelen, "%ld", cdr->amaflags);
00267       } else {
00268          ast_copy_string(workspace, ast_cdr_flags2str(cdr->amaflags), workspacelen);
00269       }
00270    } else if (!strcasecmp(name, "accountcode"))
00271       ast_copy_string(workspace, cdr->accountcode, workspacelen);
00272    else if (!strcasecmp(name, "uniqueid"))
00273       ast_copy_string(workspace, cdr->uniqueid, workspacelen);
00274    else if (!strcasecmp(name, "userfield"))
00275       ast_copy_string(workspace, cdr->userfield, workspacelen);
00276    else if ((varbuf = ast_cdr_getvar_internal(cdr, name, recur)))
00277       ast_copy_string(workspace, varbuf, workspacelen);
00278    else
00279       workspace[0] = '\0';
00280 
00281    if (!ast_strlen_zero(workspace))
00282       *ret = workspace;
00283 }
00284 
00285 /* readonly cdr variables */
00286 static   const char *cdr_readonly_vars[] = { "clid", "src", "dst", "dcontext", "channel", "dstchannel",
00287                 "lastapp", "lastdata", "start", "answer", "end", "duration",
00288                 "billsec", "disposition", "amaflags", "accountcode", "uniqueid",
00289                 "userfield", NULL };
00290 /*! Set a CDR channel variable 
00291    \note You can't set the CDR variables that belong to the actual CDR record, like "billsec".
00292 */
00293 int ast_cdr_setvar(struct ast_cdr *cdr, const char *name, const char *value, int recur) 
00294 {
00295    struct ast_var_t *newvariable;
00296    struct varshead *headp;
00297    int x;
00298    
00299    if (!cdr)  /* don't die if the cdr is null */
00300       return -1;
00301    
00302    for(x = 0; cdr_readonly_vars[x]; x++) {
00303       if (!strcasecmp(name, cdr_readonly_vars[x])) {
00304          ast_log(LOG_ERROR, "Attempt to set the '%s' read-only variable!.\n", name);
00305          return -1;
00306       }
00307    }
00308 
00309    if (!cdr) {
00310       ast_log(LOG_ERROR, "Attempt to set a variable on a nonexistent CDR record.\n");
00311       return -1;
00312    }
00313 
00314    for (; cdr; cdr = recur ? cdr->next : NULL) {
00315       headp = &cdr->varshead;
00316       AST_LIST_TRAVERSE_SAFE_BEGIN(headp, newvariable, entries) {
00317          if (!strcasecmp(ast_var_name(newvariable), name)) {
00318             /* there is already such a variable, delete it */
00319             AST_LIST_REMOVE_CURRENT(headp, entries);
00320             ast_var_delete(newvariable);
00321             break;
00322          }
00323       }
00324       AST_LIST_TRAVERSE_SAFE_END;
00325       
00326       if (value) {
00327          newvariable = ast_var_assign(name, value);
00328          AST_LIST_INSERT_HEAD(headp, newvariable, entries);
00329       }
00330    }
00331 
00332    return 0;
00333 }
00334 
00335 int ast_cdr_copy_vars(struct ast_cdr *to_cdr, struct ast_cdr *from_cdr)
00336 {
00337    struct ast_var_t *variables, *newvariable = NULL;
00338    struct varshead *headpa, *headpb;
00339    const char *var, *val;
00340    int x = 0;
00341 
00342    if (!to_cdr || !from_cdr) /* don't die if one of the pointers is null */
00343       return 0;
00344 
00345    headpa = &from_cdr->varshead;
00346    headpb = &to_cdr->varshead;
00347 
00348    AST_LIST_TRAVERSE(headpa,variables,entries) {
00349       if (variables &&
00350           (var = ast_var_name(variables)) && (val = ast_var_value(variables)) &&
00351           !ast_strlen_zero(var) && !ast_strlen_zero(val)) {
00352          newvariable = ast_var_assign(var, val);
00353          AST_LIST_INSERT_HEAD(headpb, newvariable, entries);
00354          x++;
00355       }
00356    }
00357 
00358    return x;
00359 }
00360 
00361 int ast_cdr_serialize_variables(struct ast_cdr *cdr, char *buf, size_t size, char delim, char sep, int recur) 
00362 {
00363    struct ast_var_t *variables;
00364    const char *var, *val;
00365    char *tmp;
00366    char workspace[256];
00367    int total = 0, x = 0, i;
00368 
00369    memset(buf, 0, size);
00370 
00371    for (; cdr; cdr = recur ? cdr->next : NULL) {
00372       if (++x > 1)
00373          ast_build_string(&buf, &size, "\n");
00374 
00375       AST_LIST_TRAVERSE(&cdr->varshead, variables, entries) {
00376          if (variables &&
00377              (var = ast_var_name(variables)) && (val = ast_var_value(variables)) &&
00378              !ast_strlen_zero(var) && !ast_strlen_zero(val)) {
00379             if (ast_build_string(&buf, &size, "level %d: %s%c%s%c", x, var, delim, val, sep)) {
00380                ast_log(LOG_ERROR, "Data Buffer Size Exceeded!\n");
00381                break;
00382             } else
00383                total++;
00384          } else 
00385             break;
00386       }
00387 
00388       for (i = 0; cdr_readonly_vars[i]; i++) {
00389          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 */
00390          ast_cdr_getvar(cdr, cdr_readonly_vars[i], &tmp, workspace, sizeof(workspace), 0, 0);
00391          if (!tmp)
00392             continue;
00393          
00394          if (ast_build_string(&buf, &size, "level %d: %s%c%s%c", x, cdr_readonly_vars[i], delim, tmp, sep)) {
00395             ast_log(LOG_ERROR, "Data Buffer Size Exceeded!\n");
00396             break;
00397          } else
00398             total++;
00399       }
00400    }
00401 
00402    return total;
00403 }
00404 
00405 
00406 void ast_cdr_free_vars(struct ast_cdr *cdr, int recur)
00407 {
00408 
00409    /* clear variables */
00410    for (; cdr; cdr = recur ? cdr->next : NULL) {
00411       struct ast_var_t *vardata;
00412       struct varshead *headp = &cdr->varshead;
00413       while ((vardata = AST_LIST_REMOVE_HEAD(headp, entries)))
00414          ast_var_delete(vardata);
00415    }
00416 }
00417 
00418 /*! \brief  print a warning if cdr already posted */
00419 static void check_post(struct ast_cdr *cdr)
00420 {
00421    if (!cdr)
00422       return;
00423    if (ast_test_flag(cdr, AST_CDR_FLAG_POSTED))
00424       ast_log(LOG_NOTICE, "CDR on channel '%s' already posted\n", S_OR(cdr->channel, "<unknown>"));
00425 }
00426 
00427 void ast_cdr_free(struct ast_cdr *cdr)
00428 {
00429 
00430    while (cdr) {
00431       struct ast_cdr *next = cdr->next;
00432       char *chan = S_OR(cdr->channel, "<unknown>");
00433       if (!ast_test_flag(cdr, AST_CDR_FLAG_POSTED) && !ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED))
00434          ast_log(LOG_NOTICE, "CDR on channel '%s' not posted\n", chan);
00435       if (ast_tvzero(cdr->end))
00436          ast_log(LOG_NOTICE, "CDR on channel '%s' lacks end\n", chan);
00437       if (ast_tvzero(cdr->start))
00438          ast_log(LOG_NOTICE, "CDR on channel '%s' lacks start\n", chan);
00439 
00440       ast_cdr_free_vars(cdr, 0);
00441       free(cdr);
00442       cdr = next;
00443    }
00444 }
00445 
00446 /*! \brief the same as a cdr_free call, only with no checks; just get rid of it */
00447 void ast_cdr_discard(struct ast_cdr *cdr)
00448 {
00449    while (cdr) {
00450       struct ast_cdr *next = cdr->next;
00451 
00452       ast_cdr_free_vars(cdr, 0);
00453       free(cdr);
00454       cdr = next;
00455    }
00456 }
00457 
00458 struct ast_cdr *ast_cdr_alloc(void)
00459 {
00460    struct ast_cdr *x = ast_calloc(1, sizeof(struct ast_cdr));
00461    if (!x)
00462       ast_log(LOG_ERROR,"Allocation Failure for a CDR!\n");
00463    return x;
00464 }
00465 
00466 static void cdr_merge_vars(struct ast_cdr *to, struct ast_cdr *from)
00467 {
00468    struct ast_var_t *variablesfrom,*variablesto;
00469    struct varshead *headpfrom = &to->varshead;
00470    struct varshead *headpto = &from->varshead;
00471    AST_LIST_TRAVERSE_SAFE_BEGIN(headpfrom, variablesfrom, entries) {
00472       /* for every var in from, stick it in to */
00473       const char *fromvarname = NULL, *fromvarval = NULL;
00474       const char *tovarname = NULL, *tovarval = NULL;
00475       fromvarname = ast_var_name(variablesfrom);
00476       fromvarval = ast_var_value(variablesfrom);
00477       tovarname = 0;
00478 
00479       /* now, quick see if that var is in the 'to' cdr already */
00480       AST_LIST_TRAVERSE(headpto, variablesto, entries) {
00481 
00482          /* now, quick see if that var is in the 'to' cdr already */
00483          if ( strcasecmp(fromvarname, ast_var_name(variablesto)) == 0 ) {
00484             tovarname = ast_var_name(variablesto);
00485             tovarval = ast_var_value(variablesto);
00486             break;
00487          }
00488       }
00489       if (tovarname && strcasecmp(fromvarval,tovarval) != 0) {  /* this message here to see how irritating the userbase finds it */
00490          ast_log(LOG_NOTICE, "Merging CDR's: variable %s value %s dropped in favor of value %s\n", tovarname, fromvarval, tovarval);
00491          continue;
00492       } else if (tovarname && strcasecmp(fromvarval,tovarval) == 0) /* if they are the same, the job is done */
00493          continue;
00494 
00495       /*rip this var out of the from cdr, and stick it in the to cdr */
00496       AST_LIST_REMOVE_CURRENT(headpfrom, entries);
00497       AST_LIST_INSERT_HEAD(headpto, variablesfrom, entries);
00498    }
00499    AST_LIST_TRAVERSE_SAFE_END;
00500 }
00501 
00502 void ast_cdr_merge(struct ast_cdr *to, struct ast_cdr *from)
00503 {
00504    struct ast_cdr *zcdr;
00505    struct ast_cdr *lto = NULL;
00506    struct ast_cdr *lfrom = NULL;
00507    int discard_from = 0;
00508    
00509    if (!to || !from)
00510       return;
00511 
00512    /* don't merge into locked CDR's -- it's bad business */
00513    if (ast_test_flag(to, AST_CDR_FLAG_LOCKED)) {
00514       zcdr = to; /* safety valve? */
00515       while (to->next) {
00516          lto = to;
00517          to = to->next;
00518       }
00519       
00520       if (ast_test_flag(to, AST_CDR_FLAG_LOCKED)) {
00521          ast_log(LOG_WARNING, "Merging into locked CDR... no choice.");
00522          to = zcdr; /* safety-- if all there are is locked CDR's, then.... ?? */
00523          lto = NULL;
00524       }
00525    }
00526 
00527    if (ast_test_flag(from, AST_CDR_FLAG_LOCKED)) {
00528       discard_from = 1;
00529       if (lto) {
00530          struct ast_cdr *llfrom = NULL;
00531          /* insert the from stuff after lto */
00532          lto->next = from;
00533          lfrom = from;
00534          while (lfrom && lfrom->next) {
00535             if (!lfrom->next->next)
00536                llfrom = lfrom;
00537             lfrom = lfrom->next; 
00538          }
00539          /* rip off the last entry and put a copy of the to at the end */
00540          llfrom->next = to;
00541          from = lfrom;
00542       } else {
00543          /* save copy of the current *to cdr */
00544          struct ast_cdr tcdr;
00545          struct ast_cdr *llfrom = NULL;
00546          memcpy(&tcdr, to, sizeof(tcdr));
00547          /* copy in the locked from cdr */
00548          memcpy(to, from, sizeof(*to));
00549          lfrom = from;
00550          while (lfrom && lfrom->next) {
00551             if (!lfrom->next->next)
00552                llfrom = lfrom;
00553             lfrom = lfrom->next; 
00554          }
00555          from->next = NULL;
00556          /* rip off the last entry and put a copy of the to at the end */
00557          if (llfrom == from)
00558             to = to->next = ast_cdr_dup(&tcdr);
00559          else
00560             to = llfrom->next = ast_cdr_dup(&tcdr);
00561          from = lfrom;
00562       }
00563    }
00564    
00565    if (!ast_tvzero(from->start)) {
00566       if (!ast_tvzero(to->start)) {
00567          if (ast_tvcmp(to->start, from->start) > 0 ) {
00568             to->start = from->start; /* use the earliest time */
00569             from->start = ast_tv(0,0); /* we actively "steal" these values */
00570          }
00571          /* else nothing to do */
00572       } else {
00573          to->start = from->start;
00574          from->start = ast_tv(0,0); /* we actively "steal" these values */
00575       }
00576    }
00577    if (!ast_tvzero(from->answer)) {
00578       if (!ast_tvzero(to->answer)) {
00579          if (ast_tvcmp(to->answer, from->answer) > 0 ) {
00580             to->answer = from->answer; /* use the earliest time */
00581             from->answer = ast_tv(0,0); /* we actively "steal" these values */
00582          }
00583          /* we got the earliest answer time, so we'll settle for that? */
00584       } else {
00585          to->answer = from->answer;
00586          from->answer = ast_tv(0,0); /* we actively "steal" these values */
00587       }
00588    }
00589    if (!ast_tvzero(from->end)) {
00590       if (!ast_tvzero(to->end)) {
00591          if (ast_tvcmp(to->end, from->end) < 0 ) {
00592             to->end = from->end; /* use the latest time */
00593             from->end = ast_tv(0,0); /* we actively "steal" these values */
00594             to->duration = to->end.tv_sec - to->start.tv_sec;  /* don't forget to update the duration, billsec, when we set end */
00595             to->billsec = ast_tvzero(to->answer) ? 0 : to->end.tv_sec - to->answer.tv_sec;
00596          }
00597          /* else, nothing to do */
00598       } else {
00599          to->end = from->end;
00600          from->end = ast_tv(0,0); /* we actively "steal" these values */
00601          to->duration = to->end.tv_sec - to->start.tv_sec;
00602          to->billsec = ast_tvzero(to->answer) ? 0 : to->end.tv_sec - to->answer.tv_sec;
00603       }
00604    }
00605    if (to->disposition < from->disposition) {
00606       to->disposition = from->disposition;
00607       from->disposition = AST_CDR_NOANSWER;
00608    }
00609    if (ast_strlen_zero(to->lastapp) && !ast_strlen_zero(from->lastapp)) {
00610       ast_copy_string(to->lastapp, from->lastapp, sizeof(to->lastapp));
00611       from->lastapp[0] = 0; /* theft */
00612    }
00613    if (ast_strlen_zero(to->lastdata) && !ast_strlen_zero(from->lastdata)) {
00614       ast_copy_string(to->lastdata, from->lastdata, sizeof(to->lastdata));
00615       from->lastdata[0] = 0; /* theft */
00616    }
00617    if (ast_strlen_zero(to->dcontext) && !ast_strlen_zero(from->dcontext)) {
00618       ast_copy_string(to->dcontext, from->dcontext, sizeof(to->dcontext));
00619       from->dcontext[0] = 0; /* theft */
00620    }
00621    if (ast_strlen_zero(to->dstchannel) && !ast_strlen_zero(from->dstchannel)) {
00622       ast_copy_string(to->dstchannel, from->dstchannel, sizeof(to->dstchannel));
00623       from->dstchannel[0] = 0; /* theft */
00624    }
00625    if (!ast_strlen_zero(from->channel) && (ast_strlen_zero(to->channel) || !strncasecmp(from->channel, "Agent/", 6))) {
00626       ast_copy_string(to->channel, from->channel, sizeof(to->channel));
00627       from->channel[0] = 0; /* theft */
00628    }
00629    if (ast_strlen_zero(to->src) && !ast_strlen_zero(from->src)) {
00630       ast_copy_string(to->src, from->src, sizeof(to->src));
00631       from->src[0] = 0; /* theft */
00632    }
00633    if (ast_strlen_zero(to->clid) && !ast_strlen_zero(from->clid)) {
00634       ast_copy_string(to->clid, from->clid, sizeof(to->clid));
00635       from->clid[0] = 0; /* theft */
00636    }
00637    if (ast_strlen_zero(to->dst) && !ast_strlen_zero(from->dst)) {
00638       ast_copy_string(to->dst, from->dst, sizeof(to->dst));
00639       from->dst[0] = 0; /* theft */
00640    }
00641    if (!to->amaflags)
00642       to->amaflags = AST_CDR_DOCUMENTATION;
00643    if (!from->amaflags)
00644       from->amaflags = AST_CDR_DOCUMENTATION; /* make sure both amaflags are set to something (DOC is default) */
00645    if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (to->amaflags == AST_CDR_DOCUMENTATION && from->amaflags != AST_CDR_DOCUMENTATION)) {
00646       to->amaflags = from->amaflags;
00647    }
00648    if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->accountcode) && !ast_strlen_zero(from->accountcode))) {
00649       ast_copy_string(to->accountcode, from->accountcode, sizeof(to->accountcode));
00650    }
00651    if (ast_test_flag(from, AST_CDR_FLAG_LOCKED) || (ast_strlen_zero(to->userfield) && !ast_strlen_zero(from->userfield))) {
00652       ast_copy_string(to->userfield, from->userfield, sizeof(to->userfield));
00653    }
00654    /* flags, varsead, ? */
00655    cdr_merge_vars(from, to);
00656 
00657    if (ast_test_flag(from, AST_CDR_FLAG_KEEP_VARS))
00658       ast_set_flag(to, AST_CDR_FLAG_KEEP_VARS);
00659    if (ast_test_flag(from, AST_CDR_FLAG_POSTED))
00660       ast_set_flag(to, AST_CDR_FLAG_POSTED);
00661    if (ast_test_flag(from, AST_CDR_FLAG_LOCKED))
00662       ast_set_flag(to, AST_CDR_FLAG_LOCKED);
00663    if (ast_test_flag(from, AST_CDR_FLAG_CHILD))
00664       ast_set_flag(to, AST_CDR_FLAG_CHILD);
00665    if (ast_test_flag(from, AST_CDR_FLAG_POST_DISABLED))
00666       ast_set_flag(to, AST_CDR_FLAG_POST_DISABLED);
00667 
00668    /* last, but not least, we need to merge any forked CDRs to the 'to' cdr */
00669    while (from->next) {
00670       /* just rip 'em off the 'from' and insert them on the 'to' */
00671       zcdr = from->next;
00672       from->next = zcdr->next;
00673       zcdr->next = NULL;
00674       /* zcdr is now ripped from the current list; */
00675       ast_cdr_append(to, zcdr);
00676    }
00677    if (discard_from)
00678       ast_cdr_discard(from);
00679 }
00680 
00681 void ast_cdr_start(struct ast_cdr *cdr)
00682 {
00683    char *chan; 
00684 
00685    for (; cdr; cdr = cdr->next) {
00686       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00687          chan = S_OR(cdr->channel, "<unknown>");
00688          check_post(cdr);
00689          cdr->start = ast_tvnow();
00690       }
00691    }
00692 }
00693 
00694 void ast_cdr_answer(struct ast_cdr *cdr)
00695 {
00696 
00697    for (; cdr; cdr = cdr->next) {
00698       check_post(cdr);
00699       if (cdr->disposition < AST_CDR_ANSWERED)
00700          cdr->disposition = AST_CDR_ANSWERED;
00701       if (ast_tvzero(cdr->answer))
00702          cdr->answer = ast_tvnow();
00703    }
00704 }
00705 
00706 void ast_cdr_busy(struct ast_cdr *cdr)
00707 {
00708 
00709    for (; cdr; cdr = cdr->next) {
00710       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00711          check_post(cdr);
00712          if (cdr->disposition < AST_CDR_BUSY)
00713             cdr->disposition = AST_CDR_BUSY;
00714       }
00715    }
00716 }
00717 
00718 void ast_cdr_failed(struct ast_cdr *cdr)
00719 {
00720    for (; cdr; cdr = cdr->next) {
00721       check_post(cdr);
00722       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00723          if (cdr->disposition < AST_CDR_FAILED)
00724             cdr->disposition = AST_CDR_FAILED;
00725       }
00726    }
00727 }
00728 
00729 void ast_cdr_noanswer(struct ast_cdr *cdr)
00730 {
00731    char *chan; 
00732 
00733    while (cdr) {
00734       chan = !ast_strlen_zero(cdr->channel) ? cdr->channel : "<unknown>";
00735       if (ast_test_flag(cdr, AST_CDR_FLAG_POSTED))
00736          ast_log(LOG_WARNING, "CDR on channel '%s' already posted\n", chan);
00737       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00738          if (cdr->disposition < AST_CDR_NOANSWER)
00739             cdr->disposition = AST_CDR_NOANSWER;
00740       }
00741       cdr = cdr->next;
00742    }
00743 }
00744 
00745 /* everywhere ast_cdr_disposition is called, it will call ast_cdr_failed() 
00746    if ast_cdr_disposition returns a non-zero value */
00747 
00748 int ast_cdr_disposition(struct ast_cdr *cdr, int cause)
00749 {
00750    int res = 0;
00751 
00752    for (; cdr; cdr = cdr->next) {
00753       switch(cause) {  /* handle all the non failure, busy cases, return 0 not to set disposition,
00754                      return -1 to set disposition to FAILED */
00755       case AST_CAUSE_BUSY:
00756          ast_cdr_busy(cdr);
00757          break;
00758       case AST_CAUSE_NORMAL:
00759          break;
00760       default:
00761          res = -1;
00762       }
00763    }
00764    return res;
00765 }
00766 
00767 void ast_cdr_setdestchan(struct ast_cdr *cdr, const char *chann)
00768 {
00769    for (; cdr; cdr = cdr->next) {
00770       check_post(cdr);
00771       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00772          ast_copy_string(cdr->dstchannel, chann, sizeof(cdr->dstchannel));
00773    }
00774 }
00775 
00776 void ast_cdr_setapp(struct ast_cdr *cdr, char *app, char *data)
00777 {
00778 
00779    for (; cdr; cdr = cdr->next) {
00780       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00781          check_post(cdr);
00782          ast_copy_string(cdr->lastapp, S_OR(app, ""), sizeof(cdr->lastapp));
00783          ast_copy_string(cdr->lastdata, S_OR(data, ""), sizeof(cdr->lastdata));
00784       }
00785    }
00786 }
00787 
00788 /* set cid info for one record */
00789 static void set_one_cid(struct ast_cdr *cdr, struct ast_channel *c)
00790 {
00791    /* Grab source from ANI or normal Caller*ID */
00792    const char *num = S_OR(c->cid.cid_ani, c->cid.cid_num);
00793    if (!cdr)
00794       return;
00795    if (!ast_strlen_zero(c->cid.cid_name)) {
00796       if (!ast_strlen_zero(num)) /* both name and number */
00797          snprintf(cdr->clid, sizeof(cdr->clid), "\"%s\" <%s>", c->cid.cid_name, num);
00798       else           /* only name */
00799          ast_copy_string(cdr->clid, c->cid.cid_name, sizeof(cdr->clid));
00800    } else if (!ast_strlen_zero(num)) { /* only number */
00801       ast_copy_string(cdr->clid, num, sizeof(cdr->clid));
00802    } else {          /* nothing known */
00803       cdr->clid[0] = '\0';
00804    }
00805    ast_copy_string(cdr->src, S_OR(num, ""), sizeof(cdr->src));
00806 
00807 }
00808 int ast_cdr_setcid(struct ast_cdr *cdr, struct ast_channel *c)
00809 {
00810    for (; cdr; cdr = cdr->next) {
00811       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00812          set_one_cid(cdr, c);
00813    }
00814    return 0;
00815 }
00816 
00817 int ast_cdr_init(struct ast_cdr *cdr, struct ast_channel *c)
00818 {
00819    char *chan;
00820 
00821    for ( ; cdr ; cdr = cdr->next) {
00822       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00823          chan = S_OR(cdr->channel, "<unknown>");
00824          ast_copy_string(cdr->channel, c->name, sizeof(cdr->channel));
00825          set_one_cid(cdr, c);
00826 
00827          cdr->disposition = (c->_state == AST_STATE_UP) ?  AST_CDR_ANSWERED : AST_CDR_NULL;
00828          cdr->amaflags = c->amaflags ? c->amaflags :  ast_default_amaflags;
00829          ast_copy_string(cdr->accountcode, c->accountcode, sizeof(cdr->accountcode));
00830          /* Destination information */
00831          ast_copy_string(cdr->dst, S_OR(c->macroexten,c->exten), sizeof(cdr->dst));
00832          ast_copy_string(cdr->dcontext, S_OR(c->macrocontext,c->context), sizeof(cdr->dcontext));
00833          /* Unique call identifier */
00834          ast_copy_string(cdr->uniqueid, c->uniqueid, sizeof(cdr->uniqueid));
00835       }
00836    }
00837    return 0;
00838 }
00839 
00840 /* Three routines were "fixed" via 10668, and later shown that 
00841    users were depending on this behavior. ast_cdr_end,
00842    ast_cdr_setvar and ast_cdr_answer are the three routines.
00843    While most of the other routines would not touch 
00844    LOCKED cdr's, these three routines were designed to
00845    operate on locked CDR's as a matter of course.
00846    I now appreciate how this plays with the ForkCDR app,
00847    which forms these cdr chains in the first place. 
00848    cdr_end is pretty key: all cdrs created are closed
00849    together. They only vary by start time. Arithmetically,
00850    users can calculate the subintervals they wish to track. */
00851 
00852 void ast_cdr_end(struct ast_cdr *cdr)
00853 {
00854    for ( ; cdr ; cdr = cdr->next) {
00855       check_post(cdr);
00856       if (ast_tvzero(cdr->end))
00857          cdr->end = ast_tvnow();
00858       if (ast_tvzero(cdr->start)) {
00859          ast_log(LOG_WARNING, "CDR on channel '%s' has not started\n", S_OR(cdr->channel, "<unknown>"));
00860          cdr->disposition = AST_CDR_FAILED;
00861       } else
00862          cdr->duration = cdr->end.tv_sec - cdr->start.tv_sec;
00863       cdr->billsec = ast_tvzero(cdr->answer) ? 0 : cdr->end.tv_sec - cdr->answer.tv_sec;
00864    }
00865 }
00866 
00867 char *ast_cdr_disp2str(int disposition)
00868 {
00869    switch (disposition) {
00870    case AST_CDR_NULL:
00871       return "NO ANSWER"; /* by default, for backward compatibility */
00872    case AST_CDR_NOANSWER:
00873       return "NO ANSWER";
00874    case AST_CDR_FAILED:
00875       return "FAILED";     
00876    case AST_CDR_BUSY:
00877       return "BUSY";    
00878    case AST_CDR_ANSWERED:
00879       return "ANSWERED";
00880    }
00881    return "UNKNOWN";
00882 }
00883 
00884 /*! Converts AMA flag to printable string */
00885 char *ast_cdr_flags2str(int flag)
00886 {
00887    switch(flag) {
00888    case AST_CDR_OMIT:
00889       return "OMIT";
00890    case AST_CDR_BILLING:
00891       return "BILLING";
00892    case AST_CDR_DOCUMENTATION:
00893       return "DOCUMENTATION";
00894    }
00895    return "Unknown";
00896 }
00897 
00898 int ast_cdr_setaccount(struct ast_channel *chan, const char *account)
00899 {
00900    struct ast_cdr *cdr = chan->cdr;
00901 
00902    ast_string_field_set(chan, accountcode, account);
00903    for ( ; cdr ; cdr = cdr->next) {
00904       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00905          ast_copy_string(cdr->accountcode, chan->accountcode, sizeof(cdr->accountcode));
00906       }
00907    }
00908    return 0;
00909 }
00910 
00911 int ast_cdr_setamaflags(struct ast_channel *chan, const char *flag)
00912 {
00913    struct ast_cdr *cdr;
00914    int newflag = ast_cdr_amaflags2int(flag);
00915    if (newflag) {
00916       for (cdr = chan->cdr; cdr; cdr = cdr->next) {
00917          if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00918             cdr->amaflags = newflag;
00919          }
00920       }
00921    }
00922 
00923    return 0;
00924 }
00925 
00926 int ast_cdr_setuserfield(struct ast_channel *chan, const char *userfield)
00927 {
00928    struct ast_cdr *cdr = chan->cdr;
00929 
00930    for ( ; cdr ; cdr = cdr->next) {
00931       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) 
00932          ast_copy_string(cdr->userfield, userfield, sizeof(cdr->userfield));
00933    }
00934 
00935    return 0;
00936 }
00937 
00938 int ast_cdr_appenduserfield(struct ast_channel *chan, const char *userfield)
00939 {
00940    struct ast_cdr *cdr = chan->cdr;
00941 
00942    for ( ; cdr ; cdr = cdr->next) {
00943       int len = strlen(cdr->userfield);
00944 
00945       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED))
00946          ast_copy_string(cdr->userfield + len, userfield, sizeof(cdr->userfield) - len);
00947    }
00948 
00949    return 0;
00950 }
00951 
00952 int ast_cdr_update(struct ast_channel *c)
00953 {
00954    struct ast_cdr *cdr = c->cdr;
00955 
00956    for ( ; cdr ; cdr = cdr->next) {
00957       if (!ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
00958          set_one_cid(cdr, c);
00959 
00960          /* Copy account code et-al */ 
00961          ast_copy_string(cdr->accountcode, c->accountcode, sizeof(cdr->accountcode));
00962          
00963          /* Destination information */ /* XXX privilege macro* ? */
00964          ast_copy_string(cdr->dst, S_OR(c->macroexten, c->exten), sizeof(cdr->dst));
00965          ast_copy_string(cdr->dcontext, S_OR(c->macrocontext, c->context), sizeof(cdr->dcontext));
00966       }
00967    }
00968 
00969    return 0;
00970 }
00971 
00972 int ast_cdr_amaflags2int(const char *flag)
00973 {
00974    if (!strcasecmp(flag, "default"))
00975       return 0;
00976    if (!strcasecmp(flag, "omit"))
00977       return AST_CDR_OMIT;
00978    if (!strcasecmp(flag, "billing"))
00979       return AST_CDR_BILLING;
00980    if (!strcasecmp(flag, "documentation"))
00981       return AST_CDR_DOCUMENTATION;
00982    return -1;
00983 }
00984 
00985 static void post_cdr(struct ast_cdr *cdr)
00986 {
00987    char *chan;
00988    struct ast_cdr_beitem *i;
00989 
00990    for ( ; cdr ; cdr = cdr->next) {
00991       if (!unanswered && cdr->disposition < AST_CDR_ANSWERED && (ast_strlen_zero(cdr->channel) || ast_strlen_zero(cdr->dstchannel))) {
00992          /* For people, who don't want to see unanswered single-channel events */
00993          ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
00994          continue;
00995       }
00996 
00997       chan = S_OR(cdr->channel, "<unknown>");
00998       check_post(cdr);
00999       if (ast_tvzero(cdr->end))
01000          ast_log(LOG_WARNING, "CDR on channel '%s' lacks end\n", chan);
01001       if (ast_tvzero(cdr->start))
01002          ast_log(LOG_WARNING, "CDR on channel '%s' lacks start\n", chan);
01003       ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
01004       if (ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED))
01005          continue;
01006       AST_LIST_LOCK(&be_list);
01007       AST_LIST_TRAVERSE(&be_list, i, list) {
01008          i->be(cdr);
01009       }
01010       AST_LIST_UNLOCK(&be_list);
01011    }
01012 }
01013 
01014 void ast_cdr_reset(struct ast_cdr *cdr, struct ast_flags *_flags)
01015 {
01016    struct ast_cdr *dup;
01017    struct ast_flags flags = { 0 };
01018 
01019    if (_flags)
01020       ast_copy_flags(&flags, _flags, AST_FLAGS_ALL);
01021 
01022    for ( ; cdr ; cdr = cdr->next) {
01023       /* Detach if post is requested */
01024       if (ast_test_flag(&flags, AST_CDR_FLAG_LOCKED) || !ast_test_flag(cdr, AST_CDR_FLAG_LOCKED)) {
01025          if (ast_test_flag(&flags, AST_CDR_FLAG_POSTED)) {
01026             ast_cdr_end(cdr);
01027             if ((dup = ast_cdr_dup(cdr))) {
01028                ast_cdr_detach(dup);
01029             }
01030             ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
01031          }
01032 
01033          /* clear variables */
01034          if (!ast_test_flag(&flags, AST_CDR_FLAG_KEEP_VARS)) {
01035             ast_cdr_free_vars(cdr, 0);
01036          }
01037 
01038          /* Reset to initial state */
01039          ast_clear_flag(cdr, AST_FLAGS_ALL); 
01040          memset(&cdr->start, 0, sizeof(cdr->start));
01041          memset(&cdr->end, 0, sizeof(cdr->end));
01042          memset(&cdr->answer, 0, sizeof(cdr->answer));
01043          cdr->billsec = 0;
01044          cdr->duration = 0;
01045          ast_cdr_start(cdr);
01046          cdr->disposition = AST_CDR_NULL;
01047       }
01048    }
01049 }
01050 
01051 struct ast_cdr *ast_cdr_append(struct ast_cdr *cdr, struct ast_cdr *newcdr) 
01052 {
01053    struct ast_cdr *ret;
01054 
01055    if (cdr) {
01056       ret = cdr;
01057 
01058       while (cdr->next)
01059          cdr = cdr->next;
01060       cdr->next = newcdr;
01061    } else {
01062       ret = newcdr;
01063    }
01064 
01065    return ret;
01066 }
01067 
01068 /*! \note Don't call without cdr_batch_lock */
01069 static void reset_batch(void)
01070 {
01071    batch->size = 0;
01072    batch->head = NULL;
01073    batch->tail = NULL;
01074 }
01075 
01076 /*! \note Don't call without cdr_batch_lock */
01077 static int init_batch(void)
01078 {
01079    /* This is the single meta-batch used to keep track of all CDRs during the entire life of the program */
01080    if (!(batch = ast_malloc(sizeof(*batch))))
01081       return -1;
01082 
01083    reset_batch();
01084 
01085    return 0;
01086 }
01087 
01088 static void *do_batch_backend_process(void *data)
01089 {
01090    struct ast_cdr_batch_item *processeditem;
01091    struct ast_cdr_batch_item *batchitem = data;
01092 
01093    /* Push each CDR into storage mechanism(s) and free all the memory */
01094    while (batchitem) {
01095       post_cdr(batchitem->cdr);
01096       ast_cdr_free(batchitem->cdr);
01097       processeditem = batchitem;
01098       batchitem = batchitem->next;
01099       free(processeditem);
01100    }
01101 
01102    return NULL;
01103 }
01104 
01105 void ast_cdr_submit_batch(int shutdown)
01106 {
01107    struct ast_cdr_batch_item *oldbatchitems = NULL;
01108    pthread_attr_t attr;
01109    pthread_t batch_post_thread = AST_PTHREADT_NULL;
01110 
01111    /* if there's no batch, or no CDRs in the batch, then there's nothing to do */
01112    if (!batch || !batch->head)
01113       return;
01114 
01115    /* move the old CDRs aside, and prepare a new CDR batch */
01116    ast_mutex_lock(&cdr_batch_lock);
01117    oldbatchitems = batch->head;
01118    reset_batch();
01119    ast_mutex_unlock(&cdr_batch_lock);
01120 
01121    /* if configured, spawn a new thread to post these CDRs,
01122       also try to save as much as possible if we are shutting down safely */
01123    if (batchscheduleronly || shutdown) {
01124       if (option_debug)
01125          ast_log(LOG_DEBUG, "CDR single-threaded batch processing begins now\n");
01126       do_batch_backend_process(oldbatchitems);
01127    } else {
01128       pthread_attr_init(&attr);
01129       pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
01130       if (ast_pthread_create_background(&batch_post_thread, &attr, do_batch_backend_process, oldbatchitems)) {
01131          ast_log(LOG_WARNING, "CDR processing thread could not detach, now trying in this thread\n");
01132          do_batch_backend_process(oldbatchitems);
01133       } else {
01134          if (option_debug)
01135             ast_log(LOG_DEBUG, "CDR multi-threaded batch processing begins now\n");
01136       }
01137       pthread_attr_destroy(&attr);
01138    }
01139 }
01140 
01141 static int submit_scheduled_batch(const void *data)
01142 {
01143    ast_cdr_submit_batch(0);
01144    /* manually reschedule from this point in time */
01145    cdr_sched = ast_sched_add(sched, batchtime * 1000, submit_scheduled_batch, NULL);
01146    /* returning zero so the scheduler does not automatically reschedule */
01147    return 0;
01148 }
01149 
01150 static void submit_unscheduled_batch(void)
01151 {
01152    /* this is okay since we are not being called from within the scheduler */
01153    AST_SCHED_DEL(sched, cdr_sched);
01154    /* schedule the submission to occur ASAP (1 ms) */
01155    cdr_sched = ast_sched_add(sched, 1, submit_scheduled_batch, NULL);
01156    /* signal the do_cdr thread to wakeup early and do some work (that lazy thread ;) */
01157    ast_mutex_lock(&cdr_pending_lock);
01158    ast_cond_signal(&cdr_pending_cond);
01159    ast_mutex_unlock(&cdr_pending_lock);
01160 }
01161 
01162 void ast_cdr_detach(struct ast_cdr *cdr)
01163 {
01164    struct ast_cdr_batch_item *newtail;
01165    int curr;
01166 
01167    if (!cdr)
01168       return;
01169 
01170    /* maybe they disabled CDR stuff completely, so just drop it */
01171    if (!enabled) {
01172       if (option_debug)
01173          ast_log(LOG_DEBUG, "Dropping CDR !\n");
01174       ast_set_flag(cdr, AST_CDR_FLAG_POST_DISABLED);
01175       ast_cdr_free(cdr);
01176       return;
01177    }
01178 
01179    /* post stuff immediately if we are not in batch mode, this is legacy behaviour */
01180    if (!batchmode) {
01181       post_cdr(cdr);
01182       ast_cdr_free(cdr);
01183       return;
01184    }
01185 
01186    /* otherwise, each CDR gets put into a batch list (at the end) */
01187    if (option_debug)
01188       ast_log(LOG_DEBUG, "CDR detaching from this thread\n");
01189 
01190    /* we'll need a new tail for every CDR */
01191    if (!(newtail = ast_calloc(1, sizeof(*newtail)))) {
01192       post_cdr(cdr);
01193       ast_cdr_free(cdr);
01194       return;
01195    }
01196 
01197    /* don't traverse a whole list (just keep track of the tail) */
01198    ast_mutex_lock(&cdr_batch_lock);
01199    if (!batch)
01200       init_batch();
01201    if (!batch->head) {
01202       /* new batch is empty, so point the head at the new tail */
01203       batch->head = newtail;
01204    } else {
01205       /* already got a batch with something in it, so just append a new tail */
01206       batch->tail->next = newtail;
01207    }
01208    newtail->cdr = cdr;
01209    batch->tail = newtail;
01210    curr = batch->size++;
01211    ast_mutex_unlock(&cdr_batch_lock);
01212 
01213    /* if we have enough stuff to post, then do it */
01214    if (curr >= (batchsize - 1))
01215       submit_unscheduled_batch();
01216 }
01217 
01218 static void *do_cdr(void *data)
01219 {
01220    struct timespec timeout;
01221    int schedms;
01222    int numevents = 0;
01223 
01224    for(;;) {
01225       struct timeval now;
01226       schedms = ast_sched_wait(sched);
01227       /* this shouldn't happen, but provide a 1 second default just in case */
01228       if (schedms <= 0)
01229          schedms = 1000;
01230       now = ast_tvadd(ast_tvnow(), ast_samp2tv(schedms, 1000));
01231       timeout.tv_sec = now.tv_sec;
01232       timeout.tv_nsec = now.tv_usec * 1000;
01233       /* prevent stuff from clobbering cdr_pending_cond, then wait on signals sent to it until the timeout expires */
01234       ast_mutex_lock(&cdr_pending_lock);
01235       ast_cond_timedwait(&cdr_pending_cond, &cdr_pending_lock, &timeout);
01236       numevents = ast_sched_runq(sched);
01237       ast_mutex_unlock(&cdr_pending_lock);
01238       if (option_debug > 1)
01239          ast_log(LOG_DEBUG, "Processed %d scheduled CDR batches from the run queue\n", numevents);
01240    }
01241 
01242    return NULL;
01243 }
01244 
01245 static int handle_cli_status(int fd, int argc, char *argv[])
01246 {
01247    struct ast_cdr_beitem *beitem=NULL;
01248    int cnt=0;
01249    long nextbatchtime=0;
01250 
01251    if (argc > 2)
01252       return RESULT_SHOWUSAGE;
01253 
01254    ast_cli(fd, "CDR logging: %s\n", enabled ? "enabled" : "disabled");
01255    ast_cli(fd, "CDR mode: %s\n", batchmode ? "batch" : "simple");
01256    if (enabled) {
01257       ast_cli(fd, "CDR output unanswered calls: %s\n", unanswered ? "yes" : "no");
01258       if (batchmode) {
01259          if (batch)
01260             cnt = batch->size;
01261          if (cdr_sched > -1)
01262             nextbatchtime = ast_sched_when(sched, cdr_sched);
01263          ast_cli(fd, "CDR safe shut down: %s\n", batchsafeshutdown ? "enabled" : "disabled");
01264          ast_cli(fd, "CDR batch threading model: %s\n", batchscheduleronly ? "scheduler only" : "scheduler plus separate threads");
01265          ast_cli(fd, "CDR current batch size: %d record%s\n", cnt, (cnt != 1) ? "s" : "");
01266          ast_cli(fd, "CDR maximum batch size: %d record%s\n", batchsize, (batchsize != 1) ? "s" : "");
01267          ast_cli(fd, "CDR maximum batch time: %d second%s\n", batchtime, (batchtime != 1) ? "s" : "");
01268          ast_cli(fd, "CDR next scheduled batch processing time: %ld second%s\n", nextbatchtime, (nextbatchtime != 1) ? "s" : "");
01269       }
01270       AST_LIST_LOCK(&be_list);
01271       AST_LIST_TRAVERSE(&be_list, beitem, list) {
01272          ast_cli(fd, "CDR registered backend: %s\n", beitem->name);
01273       }
01274       AST_LIST_UNLOCK(&be_list);
01275    }
01276 
01277    return 0;
01278 }
01279 
01280 static int handle_cli_submit(int fd, int argc, char *argv[])
01281 {
01282    if (argc > 2)
01283       return RESULT_SHOWUSAGE;
01284 
01285    submit_unscheduled_batch();
01286    ast_cli(fd, "Submitted CDRs to backend engines for processing.  This may take a while.\n");
01287 
01288    return 0;
01289 }
01290 
01291 static struct ast_cli_entry cli_submit = {
01292    { "cdr", "submit", NULL },
01293    handle_cli_submit, "Posts all pending batched CDR data",
01294    "Usage: cdr submit\n"
01295    "       Posts all pending batched CDR data to the configured CDR backend engine modules.\n"
01296 };
01297 
01298 static struct ast_cli_entry cli_status = {
01299    { "cdr", "status", NULL },
01300    handle_cli_status, "Display the CDR status",
01301    "Usage: cdr status\n"
01302    "  Displays the Call Detail Record engine system status.\n"
01303 };
01304 
01305 static int do_reload(void)
01306 {
01307    struct ast_config *config;
01308    const char *enabled_value;
01309    const char *unanswered_value;
01310    const char *batched_value;
01311    const char *scheduleronly_value;
01312    const char *batchsafeshutdown_value;
01313    const char *size_value;
01314    const char *time_value;
01315    const char *end_before_h_value;
01316    int cfg_size;
01317    int cfg_time;
01318    int was_enabled;
01319    int was_batchmode;
01320    int res=0;
01321 
01322    ast_mutex_lock(&cdr_batch_lock);
01323 
01324    batchsize = BATCH_SIZE_DEFAULT;
01325    batchtime = BATCH_TIME_DEFAULT;
01326    batchscheduleronly = BATCH_SCHEDULER_ONLY_DEFAULT;
01327    batchsafeshutdown = BATCH_SAFE_SHUTDOWN_DEFAULT;
01328    was_enabled = enabled;
01329    was_batchmode = batchmode;
01330    enabled = 1;
01331    batchmode = 0;
01332 
01333    /* don't run the next scheduled CDR posting while reloading */
01334    AST_SCHED_DEL(sched, cdr_sched);
01335 
01336    if ((config = ast_config_load("cdr.conf"))) {
01337       if ((enabled_value = ast_variable_retrieve(config, "general", "enable"))) {
01338          enabled = ast_true(enabled_value);
01339       }
01340       if ((unanswered_value = ast_variable_retrieve(config, "general", "unanswered"))) {
01341          unanswered = ast_true(unanswered_value);
01342       }
01343       if ((batched_value = ast_variable_retrieve(config, "general", "batch"))) {
01344          batchmode = ast_true(batched_value);
01345       }
01346       if ((scheduleronly_value = ast_variable_retrieve(config, "general", "scheduleronly"))) {
01347          batchscheduleronly = ast_true(scheduleronly_value);
01348       }
01349       if ((batchsafeshutdown_value = ast_variable_retrieve(config, "general", "safeshutdown"))) {
01350          batchsafeshutdown = ast_true(batchsafeshutdown_value);
01351       }
01352       if ((size_value = ast_variable_retrieve(config, "general", "size"))) {
01353          if (sscanf(size_value, "%d", &cfg_size) < 1)
01354             ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", size_value);
01355          else if (size_value < 0)
01356             ast_log(LOG_WARNING, "Invalid maximum batch size '%d' specified, using default\n", cfg_size);
01357          else
01358             batchsize = cfg_size;
01359       }
01360       if ((time_value = ast_variable_retrieve(config, "general", "time"))) {
01361          if (sscanf(time_value, "%d", &cfg_time) < 1)
01362             ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", time_value);
01363          else if (time_value < 0)
01364             ast_log(LOG_WARNING, "Invalid maximum batch time '%d' specified, using default\n", cfg_time);
01365          else
01366             batchtime = cfg_time;
01367       }
01368       if ((end_before_h_value = ast_variable_retrieve(config, "general", "endbeforehexten")))
01369          ast_set2_flag(&ast_options, ast_true(end_before_h_value), AST_OPT_FLAG_END_CDR_BEFORE_H_EXTEN);
01370    }
01371 
01372    if (enabled && !batchmode) {
01373       ast_log(LOG_NOTICE, "CDR simple logging enabled.\n");
01374    } else if (enabled && batchmode) {
01375       cdr_sched = ast_sched_add(sched, batchtime * 1000, submit_scheduled_batch, NULL);
01376       ast_log(LOG_NOTICE, "CDR batch mode logging enabled, first of either size %d or time %d seconds.\n", batchsize, batchtime);
01377    } else {
01378       ast_log(LOG_NOTICE, "CDR logging disabled, data will be lost.\n");
01379    }
01380 
01381    /* if this reload enabled the CDR batch mode, create the background thread
01382       if it does not exist */
01383    if (enabled && batchmode && (!was_enabled || !was_batchmode) && (cdr_thread == AST_PTHREADT_NULL)) {
01384       ast_cond_init(&cdr_pending_cond, NULL);
01385       if (ast_pthread_create_background(&cdr_thread, NULL, do_cdr, NULL) < 0) {
01386          ast_log(LOG_ERROR, "Unable to start CDR thread.\n");
01387          AST_SCHED_DEL(sched, cdr_sched);
01388       } else {
01389          ast_cli_register(&cli_submit);
01390          ast_register_atexit(ast_cdr_engine_term);
01391          res = 0;
01392       }
01393    /* if this reload disabled the CDR and/or batch mode and there is a background thread,
01394       kill it */
01395    } else if (((!enabled && was_enabled) || (!batchmode && was_batchmode)) && (cdr_thread != AST_PTHREADT_NULL)) {
01396       /* wake up the thread so it will exit */
01397       pthread_cancel(cdr_thread);
01398       pthread_kill(cdr_thread, SIGURG);
01399       pthread_join(cdr_thread, NULL);
01400       cdr_thread = AST_PTHREADT_NULL;
01401       ast_cond_destroy(&cdr_pending_cond);
01402       ast_cli_unregister(&cli_submit);
01403       ast_unregister_atexit(ast_cdr_engine_term);
01404       res = 0;
01405       /* if leaving batch mode, then post the CDRs in the batch,
01406          and don't reschedule, since we are stopping CDR logging */
01407       if (!batchmode && was_batchmode) {
01408          ast_cdr_engine_term();
01409       }
01410    } else {
01411       res = 0;
01412    }
01413 
01414    ast_mutex_unlock(&cdr_batch_lock);
01415    ast_config_destroy(config);
01416 
01417    return res;
01418 }
01419 
01420 int ast_cdr_engine_init(void)
01421 {
01422    int res;
01423 
01424    sched = sched_context_create();
01425    if (!sched) {
01426       ast_log(LOG_ERROR, "Unable to create schedule context.\n");
01427       return -1;
01428    }
01429 
01430    ast_cli_register(&cli_status);
01431 
01432    res = do_reload();
01433    if (res) {
01434       ast_mutex_lock(&cdr_batch_lock);
01435       res = init_batch();
01436       ast_mutex_unlock(&cdr_batch_lock);
01437    }
01438 
01439    return res;
01440 }
01441 
01442 /* \note This actually gets called a couple of times at shutdown.  Once, before we start
01443    hanging up channels, and then again, after the channel hangup timeout expires */
01444 void ast_cdr_engine_term(void)
01445 {
01446    ast_cdr_submit_batch(batchsafeshutdown);
01447 }
01448 
01449 int ast_cdr_engine_reload(void)
01450 {
01451    return do_reload();
01452 }
01453 

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