Merged revisions 221153,221157,221303 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r221153 | mnick | 2009-09-30 10:37:39 -0500 (Wed, 30 Sep 2009) | 2 lines
  
  check bounds - prevents for buffer overflow
........
  r221157 | mnick | 2009-09-30 10:41:46 -0500 (Wed, 30 Sep 2009) | 8 lines
  
  added a new dialplan function 'CSV_QUOTE' and changed the cdr_custom.sample.conf
  
  (closes issue #15471)
  Reported by: dkerr
  Patches:
        csv_quote_14.txt uploaded by mnick (license )
  Tested by: mnick
........
  r221303 | mnick | 2009-09-30 14:02:00 -0500 (Wed, 30 Sep 2009) | 2 lines
  
  changed the prototype definition of csv_quote
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@221368 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/cdr_custom.conf.sample

@@ -7,6 +7,6 @@
 ; Master.csv, Simple.csv, or both.
 ;
 ;[mappings]
-;Master.csv => "${CDR(clid)}","${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)}"
+;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)})}
-;Simple.csv => "${EPOCH}","${CDR(src)}","${CDR(dst)}"
+;Simple.csv => ${CSV_QUOTE(${EPOCH})},${CSV_QUOTE(${CDR(src)})},${CSV_QUOTE(${CDR(dst)})}
 

funcs/func_strings.c

@@ -276,6 +276,17 @@ AST_THREADSTORAGE(result_buf);
 			<para>Example: ${QUOTE(ab"c"de)} will return "abcde"</para>
 		</description>
 	</function>
+	<function name="CSV_QUOTE" language="en_US">
+		<synopsis>
+			Quotes a given string for use in a CSV file, escaping embedded quotes as necessary
+		</synopsis>
+		<syntax>
+			<parameter name="string" required="true" />
+		</syntax>
+		<description>
+			<para>Example: ${CSV_QUOTE("a,b" 123)} will return """a,b"" 123"</para>
+		</description>
+	</function>
 	<function name="SHIFT" language="en_US">
 		<synopsis>
 			Removes and returns the first item off of a variable containing delimited text
@@ -862,6 +873,12 @@ static struct ast_custom_function array_function = {
 static int quote(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
 {
 	char *bufptr = buf, *dataptr = data;
+
+	if (len < 3){ /* at least two for quotes and one for binary zero */
+		ast_log(LOG_ERROR, "Not enough buffer");
+		return -1;
+	}
+
 	if (ast_strlen_zero(data)) {
 		ast_log(LOG_WARNING, "No argument specified!\n");
 		ast_copy_string(buf, "\"\"", len);
@@ -869,7 +886,7 @@ static int quote(struct ast_channel *chan, const char *cmd, char *data, char *bu
 	}
 
 	*bufptr++ = '"';
-	for (; bufptr < buf + len - 1; dataptr++) {
+	for (; bufptr < buf + len - 3; dataptr++) {
 		if (*dataptr == '\\') {
 			*bufptr++ = '\\';
 			*bufptr++ = '\\';
@@ -892,9 +909,43 @@ static struct ast_custom_function quote_function = {
 	.read = quote,
 };
 
+static int csv_quote(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
+{
+	char *bufptr = buf, *dataptr = data;
+
+	if (len < 3){ /* at least two for quotes and one for binary zero */
+		ast_log(LOG_ERROR, "Not enough buffer");
+		return -1;
+	}
+
+	if (ast_strlen_zero(data)) {
+		ast_log(LOG_WARNING, "No argument specified!\n");
+		ast_copy_string(buf,"\"\"",len);
+		return 0;
+	}
+
+	*bufptr++ = '"';
+	for (; bufptr < buf + len - 3; dataptr++){
+		if (*dataptr == '"') {
+			*bufptr++ = '"';
+			*bufptr++ = '"';
+		} else if (*dataptr == '\0') {
+			break;
+		} else {
+			*bufptr++ = *dataptr;
+		}
+	}
+	*bufptr++ = '"';
+	*bufptr='\0';
+	return 0;
+}
+
+static struct ast_custom_function csv_quote_function = {
+	.name = "CSV_QUOTE",
+	.read = csv_quote,
+};
 
-static int len(struct ast_channel *chan, const char *cmd, char *data, char *buf,
+static int len(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t buflen)
-	       size_t buflen)
 {
 	int length = 0;
 
@@ -1262,6 +1313,7 @@ static int unload_module(void)
 	res |= ast_custom_function_unregister(&regex_function);
 	res |= ast_custom_function_unregister(&array_function);
 	res |= ast_custom_function_unregister(&quote_function);
+	res |= ast_custom_function_unregister(&csv_quote_function);
 	res |= ast_custom_function_unregister(&len_function);
 	res |= ast_custom_function_unregister(&strftime_function);
 	res |= ast_custom_function_unregister(&strptime_function);
@@ -1290,6 +1342,7 @@ static int load_module(void)
 	res |= ast_custom_function_register(&regex_function);
 	res |= ast_custom_function_register(&array_function);
 	res |= ast_custom_function_register(&quote_function);
+	res |= ast_custom_function_register(&csv_quote_function);
 	res |= ast_custom_function_register(&len_function);
 	res |= ast_custom_function_register(&strftime_function);
 	res |= ast_custom_function_register(&strptime_function);