Add High Resolution Times to CDRs for Asterisk

People expressed an interest in having access to the exact length of calls to a finer degree than seconds. See the CHANGES and UPGRADE.txt for usage also updated the sample configs to note the change.

Patch by snuffy.

(closes issue #16559)
Reported by: cianmaher
Tested by: cianmaher, snuffy

Review: https://reviewboard.asterisk.org/r/461/

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@269153 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CHANGES

@@ -223,6 +223,8 @@ Dialplan Functions
    Returns "0" if there is a B channel associated with the call.
    Returns "1" if no B channel is associated with the call.  The call is either
    on hold or is a call waiting call.
+ * Added option to dialplan function CDR(), the 'f' option
+   allows for high resolution times for billsec and duration fields.
 
 Dialplan Variables
 ------------------
@@ -414,6 +416,9 @@ CDR
    See configs/cdr_syslog.conf.sample for more information.
  * A 'sequence' field has been added to CDRs which can be combined with
    linkedid or uniqueid to uniquely identify a CDR.
+ * Handling of billsec and duration field has changed. If your table definition
+   specifies those fields as float,double or similar they will now be logged with
+   microsecond accuracy instead of a whole integer.
 
 Calendaring for Asterisk
 ------------------------

UPGRADE.txt

@@ -88,6 +88,10 @@ From 1.6.2 to 1.8:
 * When a call is redirected inside of a Dial, the app and appdata fields of the
   CDR will now be set to "AppDial" and "(Outgoing Line)" instead of being blank.
 
+* The CDR handling of billsec and duration field has changed. If your table
+  definition specifies those fields as float,double or similar they will now
+  be logged with microsecond accuracy instead of a whole integer.
+
 From 1.6.1 to 1.6.2:
 
 * SIP no longer sends the 183 progress message for early media by

addons/cdr_mysql.c

@@ -288,6 +288,40 @@ db_reconnect:
 					ast_str_append(&sql2, 0, ",");
 				}
 
+				if (!strcasecmp(cdrname, "billsec") &&
+					(strstr(entry->type, "float") ||
+					strstr(entry->type, "double") ||
+					strstr(entry->type, "decimal") ||
+					strstr(entry->type, "numeric") ||
+					strstr(entry->type, "real"))) {
+
+					if (!ast_tvzero(cdr->answer)) {
+						snprintf(workspace, sizeof(workspace), "%lf",
+							(double) (ast_tvdiff_us(cdr->end, cdr->answer) / 1000000.0));
+					} else {
+						ast_copy_string(workspace, "0", sizeof(workspace));
+					}
+
+					if (!ast_strlen_zero(workspace)) {
+						value = workspace;
+					}
+				}
+
+				if (!strcasecmp(cdrname, "duration") &&
+					(strstr(entry->type, "float") ||
+					strstr(entry->type, "double") ||
+					strstr(entry->type, "decimal") ||
+					strstr(entry->type, "numeric") ||
+					strstr(entry->type, "real"))) {
+
+					snprintf(workspace, sizeof(workspace), "%lf",
+						(double) (ast_tvdiff_us(cdr->end, cdr->start) / 1000000.0));
+
+					if (!ast_strlen_zero(workspace)) {
+						value = workspace;
+					}
+				}
+
 				ast_str_make_space(&escape, (valsz = strlen(value)) * 2 + 1);
 				mysql_real_escape_string(&mysql, ast_str_buffer(escape), value, valsz);
 

cdr/cdr_adaptive_odbc.c

@@ -611,6 +611,23 @@ static int odbc_log(struct ast_cdr *cdr)
 						continue;
 					} else {
 						double number = 0.0;
+
+						if (!strcasecmp(entry->cdrname, "billsec")) {
+							if (!ast_tvzero(cdr->answer)) {
+								snprintf(colbuf, sizeof(colbuf), "%lf",
+											(double) (ast_tvdiff_us(cdr->end, cdr->answer) / 1000000.0));
+							} else {
+								ast_copy_string(colbuf, "0", sizeof(colbuf));
+							}
+						} else if (!strcasecmp(entry->cdrname, "duration")) {
+							snprintf(colbuf, sizeof(colbuf), "%lf",
+										(double) (ast_tvdiff_us(cdr->end, cdr->start) / 1000000.0));
+
+							if (!ast_strlen_zero(colbuf)) {
+								colptr = colbuf;
+							}
+						}
+
 						if (sscanf(colptr, "%30lf", &number) != 1) {
 							ast_log(LOG_WARNING, "CDR variable %s is not an numeric type.\n", entry->name);
 							continue;
@@ -628,6 +645,23 @@ static int odbc_log(struct ast_cdr *cdr)
 						continue;
 					} else {
 						double number = 0.0;
+
+						if (!strcasecmp(entry->cdrname, "billsec")) {
+							if (!ast_tvzero(cdr->answer)) {
+								snprintf(colbuf, sizeof(colbuf), "%lf",
+											(double) (ast_tvdiff_us(cdr->end, cdr->answer) / 1000000.0));
+							} else {
+								ast_copy_string(colbuf, "0", sizeof(colbuf));
+							}
+						} else if (!strcasecmp(entry->cdrname, "duration")) {
+							snprintf(colbuf, sizeof(colbuf), "%lf",
+										(double) (ast_tvdiff_us(cdr->end, cdr->start) / 1000000.0));
+
+							if (!ast_strlen_zero(colbuf)) {
+								colptr = colbuf;
+							}
+						}
+
 						if (sscanf(colptr, "%30lf", &number) != 1) {
 							ast_log(LOG_WARNING, "CDR variable %s is not an numeric type.\n", entry->name);
 							continue;

cdr/cdr_odbc.c

@@ -53,6 +53,7 @@ enum {
 	CONFIG_LOGUNIQUEID =       1 << 0,
 	CONFIG_USEGMTIME =         1 << 1,
 	CONFIG_DISPOSITIONSTRING = 1 << 2,
+	CONFIG_HRTIME =            1 << 3,
 };
 
 static struct ast_flags config = { 0 };
@@ -96,8 +97,23 @@ static SQLHSTMT execute_cb(struct odbc_obj *obj, void *data)
 	SQLBindParameter(stmt, 6, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, sizeof(cdr->dstchannel), 0, cdr->dstchannel, 0, NULL);
 	SQLBindParameter(stmt, 7, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, sizeof(cdr->lastapp), 0, cdr->lastapp, 0, NULL);
 	SQLBindParameter(stmt, 8, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, sizeof(cdr->lastdata), 0, cdr->lastdata, 0, NULL);
-	SQLBindParameter(stmt, 9, SQL_PARAM_INPUT, SQL_C_SLONG, SQL_INTEGER, 0, 0, &cdr->duration, 0, NULL);
+
-	SQLBindParameter(stmt, 10, SQL_PARAM_INPUT, SQL_C_SLONG, SQL_INTEGER, 0, 0, &cdr->billsec, 0, NULL);
+	if (ast_test_flag(&config, CONFIG_HRTIME)) {
+		double hrbillsec = 0.0;
+		double hrduration;
+
+		if (!ast_tvzero(cdr->answer)) {
+			hrbillsec = (double) ast_tvdiff_us(cdr->end, cdr->answer) / 1000000.0;
+		}
+		hrduration = (double) ast_tvdiff_us(cdr->end, cdr->start) / 1000000.0;
+
+		SQLBindParameter(stmt, 9, SQL_PARAM_INPUT, SQL_C_DOUBLE, SQL_FLOAT, 0, 0, &hrbillsec, 0, NULL);
+		SQLBindParameter(stmt, 10, SQL_PARAM_INPUT, SQL_C_DOUBLE, SQL_FLOAT, 0, 0, &hrduration, 0, NULL);
+	} else {
+		SQLBindParameter(stmt, 9, SQL_PARAM_INPUT, SQL_C_SLONG, SQL_INTEGER, 0, 0, &cdr->duration, 0, NULL);
+		SQLBindParameter(stmt, 10, SQL_PARAM_INPUT, SQL_C_SLONG, SQL_INTEGER, 0, 0, &cdr->billsec, 0, NULL);
+	}
+
 	if (ast_test_flag(&config, CONFIG_DISPOSITIONSTRING))
 		SQLBindParameter(stmt, 11, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, strlen(ast_cdr_disp2str(cdr->disposition)) + 1, 0, ast_cdr_disp2str(cdr->disposition), 0, NULL);
 	else
@@ -203,6 +219,14 @@ static int odbc_load_module(int reload)
 			ast_debug(1, "cdr_odbc: Logging in local time\n");
 		}
 
+		if (((tmp = ast_variable_retrieve(cfg, "global", "hrtime"))) && ast_true(tmp)) {
+			ast_set_flag(&config, CONFIG_HRTIME);
+			ast_debug(1, "cdr_odbc: Logging billsec and duration fields as floats\n");
+		} else {
+			ast_clear_flag(&config, CONFIG_HRTIME);
+			ast_debug(1, "cdr_odbc: Logging billsec and duration fields as integers\n");
+		}
+
 		if ((tmp = ast_variable_retrieve(cfg, "global", "table")) == NULL) {
 			ast_log(LOG_WARNING, "cdr_odbc: table not specified.  Assuming cdr\n");
 			tmp = "cdr";

cdr/cdr_pgsql.c

@@ -211,12 +211,12 @@ static int pgsql_log(struct ast_cdr *cdr)
 				} else if (strncmp(cur->type, "float", 5) == 0) {
 					struct timeval *when = cur->name[0] == 'd' ? &cdr->start : &cdr->answer;
 					LENGTHEN_BUF2(31);
-					ast_str_append(&sql2, 0, "%s%f", first ? "" : ",", (double)cdr->end.tv_sec - when->tv_sec + cdr->end.tv_usec / 1000000.0 - when->tv_usec / 1000000.0);
+					ast_str_append(&sql2, 0, "%s%f", first ? "" : ",", (double) (ast_tvdiff_us(cdr->end, *when) / 1000000.0));
 				} else {
 					/* Char field, probably */
 					struct timeval *when = cur->name[0] == 'd' ? &cdr->start : &cdr->answer;
 					LENGTHEN_BUF2(31);
-					ast_str_append(&sql2, 0, "%s'%f'", first ? "" : ",", (double)cdr->end.tv_sec - when->tv_sec + cdr->end.tv_usec / 1000000.0 - when->tv_usec / 1000000.0);
+					ast_str_append(&sql2, 0, "%s'%f'", first ? "" : ",", (double) (ast_tvdiff_us(cdr->end, *when) / 1000000.0));
 				}
 			} else if (strcmp(cur->name, "disposition") == 0 || strcmp(cur->name, "amaflags") == 0) {
 				if (strncmp(cur->type, "int", 3) == 0) {

cdr/cdr_sqlite.c

@@ -49,8 +49,9 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/utils.h"
 #include "asterisk/paths.h"
 
-#define LOG_UNIQUEID	0
+#define LOG_UNIQUEID    0
-#define LOG_USERFIELD	0
+#define LOG_USERFIELD   0
+#define LOG_HRTIME      0
 
 /* When you change the DATE_FORMAT, be sure to change the CHAR(19) below to something else */
 #define DATE_FORMAT "%Y-%m-%d %T"
@@ -74,8 +75,13 @@ static const char sql_create_table[] = "CREATE TABLE cdr ("
 "	start		CHAR(19),"
 "	answer		CHAR(19),"
 "	end		CHAR(19),"
+#if LOG_HRTIME
+"	duration	FLOAT,"
+"	billsec		FLOAT,"
+#else
 "	duration	INTEGER,"
 "	billsec		INTEGER,"
+#endif
 "	disposition	INTEGER,"
 "	amaflags	INTEGER,"
 "	accountcode	VARCHAR(20)"
@@ -101,6 +107,10 @@ static int sqlite_log(struct ast_cdr *cdr)
 	char *zErr = 0;
 	char startstr[80], answerstr[80], endstr[80];
 	int count;
+#if LOG_HRTIME
+	double hrbillsec = 0.0;
+	double hrduration;
+#endif
 
 	ast_mutex_lock(&sqlite_lock);
 
@@ -108,6 +118,13 @@ static int sqlite_log(struct ast_cdr *cdr)
 	format_date(answerstr, sizeof(answerstr), &cdr->answer);
 	format_date(endstr, sizeof(endstr), &cdr->end);
 
+#if LOG_HRTIME
+	if (!ast_tvzero(cdr->answer)) {
+		hrbillsec = (double) ast_tvdiff_us(cdr->end, cdr->answer) / 1000000.0;
+	}
+	hrduration = (double) ast_tvdiff_us(cdr->end, cdr->start) / 1000000.0;
+#endif
+
 	for(count=0; count<5; count++) {
 		res = sqlite_exec_printf(db,
 			"INSERT INTO cdr ("
@@ -126,7 +143,11 @@ static int sqlite_log(struct ast_cdr *cdr)
 				"'%q', '%q', '%q', '%q', "
 				"'%q', '%q', '%q', '%q', "
 				"'%q', '%q', '%q', "
+#if LOG_HRTIME
+				"%f, %f, %d, %d, "
+#else
 				"%d, %d, %d, %d, "
+#endif
 				"'%q'"
 #				if LOG_UNIQUEID
 				",'%q'"
@@ -138,7 +159,11 @@ static int sqlite_log(struct ast_cdr *cdr)
 				cdr->clid, cdr->src, cdr->dst, cdr->dcontext,
 				cdr->channel, cdr->dstchannel, cdr->lastapp, cdr->lastdata,
 				startstr, answerstr, endstr,
+#if LOG_HRTIME
+				hrduration, hrbillsec, cdr->disposition, cdr->amaflags,
+#else
 				cdr->duration, cdr->billsec, cdr->disposition, cdr->amaflags,
+#endif
 				cdr->accountcode
 #				if LOG_UNIQUEID
 				,cdr->uniqueid

cdr/cdr_tds.c

@@ -87,6 +87,7 @@ struct cdr_tds_config {
 		AST_STRING_FIELD(table);
 		AST_STRING_FIELD(charset);
 		AST_STRING_FIELD(language);
+		AST_STRING_FIELD(hrtime);
 	);
 	DBPROCESS *dbproc;
 	unsigned int connected:1;
@@ -149,7 +150,36 @@ retry:
 	}
 
 	if (settings->has_userfield) {
-		erc = dbfcmd(settings->dbproc,
+		if (settings->hrtime) {
+			double hrbillsec = 0.0;
+			double hrduration;
+
+			if (!ast_tvzero(cdr->answer)) {
+				hrbillsec = (double)(ast_tvdiff_us(cdr->end, cdr->answer) / 1000000.0);
+			}
+			hrduration = (double)(ast_tvdiff_us(cdr->end, cdr->start) / 1000000.0);
+
+			erc = dbfcmd(settings->dbproc,
+					 "INSERT INTO %s "
+					 "("
+					 "accountcode, src, dst, dcontext, clid, channel, "
+					 "dstchannel, lastapp, lastdata, start, answer, [end], duration, "
+					 "billsec, disposition, amaflags, uniqueid, userfield"
+					 ") "
+					 "VALUES "
+					 "("
+					 "'%s', '%s', '%s', '%s', '%s', '%s', "
+					 "'%s', '%s', '%s', %s, %s, %s, %lf, "
+					 "%lf, '%s', '%s', '%s', '%s'"
+					 ")",
+					 settings->table,
+					 accountcode, src, dst, dcontext, clid, channel,
+					 dstchannel, lastapp, lastdata, start, answer, end, hrduration,
+					 hrbillsec, ast_cdr_disp2str(cdr->disposition), ast_cdr_flags2str(cdr->amaflags), uniqueid,
+					 userfield
+			);
+		} else {
+			erc = dbfcmd(settings->dbproc,
 					 "INSERT INTO %s "
 					 "("
 					 "accountcode, src, dst, dcontext, clid, channel, "
@@ -168,8 +198,37 @@ retry:
 					 cdr->billsec, ast_cdr_disp2str(cdr->disposition), ast_cdr_flags2str(cdr->amaflags), uniqueid,
 					 userfield
 			);
+		}
 	} else {
-		erc = dbfcmd(settings->dbproc,
+		if (settings->hrtime) {
+			double hrbillsec = 0.0;
+			double hrduration;
+
+			if (!ast_tvzero(cdr->answer)) {
+				hrbillsec = (double)(ast_tvdiff_us(cdr->end, cdr->answer) / 1000000.0);
+			}
+			hrduration = (double)(ast_tvdiff_us(cdr->end, cdr->start) / 1000000.0);
+
+			erc = dbfcmd(settings->dbproc,
+					 "INSERT INTO %s "
+					 "("
+					 "accountcode, src, dst, dcontext, clid, channel, "
+					 "dstchannel, lastapp, lastdata, start, answer, [end], duration, "
+					 "billsec, disposition, amaflags, uniqueid"
+					 ") "
+					 "VALUES "
+					 "("
+					 "'%s', '%s', '%s', '%s', '%s', '%s', "
+					 "'%s', '%s', '%s', %s, %s, %s, %lf, "
+					 "%lf, '%s', '%s', '%s'"
+					 ")",
+					 settings->table,
+					 accountcode, src, dst, dcontext, clid, channel,
+					 dstchannel, lastapp, lastdata, start, answer, end, hrduration,
+					 hrbillsec, ast_cdr_disp2str(cdr->disposition), ast_cdr_flags2str(cdr->amaflags), uniqueid
+			);
+		} else {
+			erc = dbfcmd(settings->dbproc,
 					 "INSERT INTO %s "
 					 "("
 					 "accountcode, src, dst, dcontext, clid, channel, "
@@ -187,6 +246,7 @@ retry:
 					 dstchannel, lastapp, lastdata, start, answer, end, cdr->duration,
 					 cdr->billsec, ast_cdr_disp2str(cdr->disposition), ast_cdr_flags2str(cdr->amaflags), uniqueid
 			);
+		}
 	}
 
 	if (erc == FAIL) {
@@ -502,6 +562,13 @@ static int tds_load_module(int reload)
 		ast_string_field_set(settings, table, "cdr");
 	}
 
+	ptr = ast_variable_retrieve(cfg, "global", "hrtime");
+	if (ptr && ast_true(ptr)) {
+		ast_string_field_set(settings, hrtime, ptr);
+	} else {
+		ast_log(LOG_NOTICE, "High Resolution Time not found, using integers for billsec and duration fields by default.\n");
+	}
+
 	mssql_disconnect();
 
 	if (mssql_connect()) {

configs/cdr_custom.conf.sample

@@ -8,5 +8,7 @@
 ;
 ;[mappings]
 ;Master.csv => ${CSV_QUOTE(${CDR(clid)})},${CSV_QUOTE(${CDR(src)})},${CSV_QUOTE(${CDR(dst)})},${CSV_QUOTE(${CDR(dcontext)})},${CSV_QUOTE(${CDR(channel)})},${CSV_QUOTE(${CDR(dstchannel)})},${CSV_QUOTE(${CDR(lastapp)})},${CSV_QUOTE(${CDR(lastdata)})},${CSV_QUOTE(${CDR(start)})},${CSV_QUOTE(${CDR(answer)})},${CSV_QUOTE(${CDR(end)})},${CSV_QUOTE(${CDR(duration)})},${CSV_QUOTE(${CDR(billsec)})},${CSV_QUOTE(${CDR(disposition)})},${CSV_QUOTE(${CDR(amaflags)})},${CSV_QUOTE(${CDR(accountcode)})},${CSV_QUOTE(${CDR(uniqueid)})},${CSV_QUOTE(${CDR(userfield)})},${CDR(sequence)}
+;
+; High Resolution Time for billsec and duration fields
+;Master.csv => ${CSV_QUOTE(${CDR(clid)})},${CSV_QUOTE(${CDR(src)})},${CSV_QUOTE(${CDR(dst)})},${CSV_QUOTE(${CDR(dcontext)})},${CSV_QUOTE(${CDR(channel)})},${CSV_QUOTE(${CDR(dstchannel)})},${CSV_QUOTE(${CDR(lastapp)})},${CSV_QUOTE(${CDR(lastdata)})},${CSV_QUOTE(${CDR(start)})},${CSV_QUOTE(${CDR(answer)})},${CSV_QUOTE(${CDR(end)})},${CSV_QUOTE(${CDR(duration,f)})},${CSV_QUOTE(${CDR(billsec,f)})},${CSV_QUOTE(${CDR(disposition)})},${CSV_QUOTE(${CDR(amaflags)})},${CSV_QUOTE(${CDR(accountcode)})},${CSV_QUOTE(${CDR(uniqueid)})},${CSV_QUOTE(${CDR(userfield)})},${CDR(sequence)}
 ;Simple.csv => ${CSV_QUOTE(${EPOCH})},${CSV_QUOTE(${CDR(src)})},${CSV_QUOTE(${CDR(dst)})}
-

configs/cdr_odbc.conf.sample

@@ -8,3 +8,4 @@
 ;dispositionstring=yes
 ;table=cdr		;"cdr" is default table name
 ;usegmtime=no             ; set to "yes" to log in GMT
+;hrtime=yes		;Enables microsecond accuracy with the billsec and duration fields

configs/cdr_sqlite3_custom.conf.sample

@@ -5,3 +5,6 @@
 table	=> cdr
 columns	=> calldate, clid, dcontext, channel, dstchannel, lastapp, lastdata, duration, billsec, disposition, amaflags, accountcode, uniqueid, userfield, test
 values	=> '${CDR(start)}','${CDR(clid)}','${CDR(dcontext)}','${CDR(channel)}','${CDR(dstchannel)}','${CDR(lastapp)}','${CDR(lastdata)}','${CDR(duration)}','${CDR(billsec)}','${CDR(disposition)}','${CDR(amaflags)}','${CDR(accountcode)}','${CDR(uniqueid)}','${CDR(userfield)}','${CDR(test)}'
+
+;Enable High Resolution Times for billsec and duration fields
+;values	=> '${CDR(start)}','${CDR(clid)}','${CDR(dcontext)}','${CDR(channel)}','${CDR(dstchannel)}','${CDR(lastapp)}','${CDR(lastdata)}','${CDR(duration,f)}','${CDR(billsec,f)}','${CDR(disposition)}','${CDR(amaflags)}','${CDR(accountcode)}','${CDR(uniqueid)}','${CDR(userfield)}','${CDR(test)}'

configs/cdr_syslog.conf.sample

@@ -73,6 +73,8 @@
 
 ;template = "${CDR(clid)}","${CDR(src)}","${CDR(dst)}","${CDR(dcontext)}","${CDR(channel)}","${CDR(dstchannel)}","${CDR(lastapp)}","${CDR(lastdata)}","${CDR(start)}","${CDR(answer)}","${CDR(end)}","${CDR(duration)}","${CDR(billsec)}","${CDR(disposition)}","${CDR(amaflags)}","${CDR(accountcode)}","${CDR(uniqueid)}","${CDR(userfield)}"
 
+; High Resolution Time for billsec and duration fields
+;template = "${CDR(clid)}","${CDR(src)}","${CDR(dst)}","${CDR(dcontext)}","${CDR(channel)}","${CDR(dstchannel)}","${CDR(lastapp)}","${CDR(lastdata)}","${CDR(start)}","${CDR(answer)}","${CDR(end)}","${CDR(duration,f)}","${CDR(billsec,f)}","${CDR(disposition)}","${CDR(amaflags)}","${CDR(accountcode)}","${CDR(uniqueid)}","${CDR(userfield)}"
 ;[cdr-simple]
 
 ; Since we don't specify a facility or priority for this logging location, the

configs/cdr_tds.conf.sample

@@ -65,3 +65,14 @@
 ; Default value:  iso_1
 
 ;charset=BIG5
+
+; High Resolution Times
+;
+; The 'hrtime' setting is used to store high resolution (sub second) times for
+; billsec and duration fields.
+;
+; Accepted value: true or false
+; Default value: false
+
+;hrtime=false
+

funcs/func_cdr.c

@@ -106,6 +106,9 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 			</parameter>
 			<parameter name="options" required="false">
 				<optionlist>
+					<option name="f">
+						<para>Returns billsec or duration fields as floating point values.</para>
+					</option>
 					<option name="l">
 						<para>Uses the most recent CDR on a channel with multiple records</para>
 					</option>
@@ -174,9 +177,11 @@ enum cdr_option_flags {
 	OPT_UNPARSED = (1 << 1),
 	OPT_LAST = (1 << 2),
 	OPT_SKIPLOCKED = (1 << 3),
+	OPT_FLOAT = (1 << 4),
 };
 
 AST_APP_OPTIONS(cdr_func_options, {
+	AST_APP_OPTION('f', OPT_FLOAT),
 	AST_APP_OPTION('l', OPT_LAST),
 	AST_APP_OPTION('r', OPT_RECURSIVE),
 	AST_APP_OPTION('s', OPT_SKIPLOCKED),
@@ -213,9 +218,38 @@ static int cdr_read(struct ast_channel *chan, const char *cmd, char *parse,
 		while (ast_test_flag(cdr, AST_CDR_FLAG_LOCKED) && cdr->next)
 			cdr = cdr->next;
 
-	ast_cdr_getvar(cdr, args.variable, &ret, buf, len,
+	if (!strcasecmp("billsec", args.variable) && ast_test_flag(&flags, OPT_FLOAT)) {
-		       ast_test_flag(&flags, OPT_RECURSIVE),
+		if (!ast_tvzero(cdr->answer)) {
-			   ast_test_flag(&flags, OPT_UNPARSED));
+			double hrtime;
+
+			if(!ast_tvzero(cdr->end))
+				hrtime = (double)(ast_tvdiff_us(cdr->end, cdr->answer) / 1000000.0);
+			else
+				hrtime = (double)(ast_tvdiff_us(ast_tvnow(), cdr->answer) / 1000000.0);
+
+			snprintf(buf, len, "%lf", hrtime);
+		} else {
+			snprintf(buf, len, "%lf", 0.0);
+		}
+		ret = buf;
+	} else if (!strcasecmp("duration", args.variable) && ast_test_flag(&flags, OPT_FLOAT)) {
+			double hrtime;
+
+			if(!ast_tvzero(cdr->end))
+				hrtime = (double)(ast_tvdiff_us(cdr->end, cdr->start) / 1000000.0);
+			else
+				hrtime = (double)(ast_tvdiff_us(ast_tvnow(), cdr->start) / 1000000.0);
+
+			snprintf(buf, len, "%lf", hrtime);
+
+		if (!ast_strlen_zero(buf)) {
+			ret = buf;
+		}
+	} else {
+		ast_cdr_getvar(cdr, args.variable, &ret, buf, len,
+			       ast_test_flag(&flags, OPT_RECURSIVE),
+				   ast_test_flag(&flags, OPT_UNPARSED));
+	}
 
 	return ret ? 0 : -1;
 }