pbx_builtins: Allow custom tone for WaitExten.

Currently, the 'd' option will play dial tone while waiting
for digits. Allow it to accept an argument for any tone from
indications.conf.

Resolves: #1396

UserNote: The tone used while waiting for digits in WaitExten
can now be overridden by specifying an argument for the 'd'
option.

(cherry picked from commit d063257ab7)

main/pbx_builtins.c

@@ -798,8 +798,11 @@
 						</argument>
 					</option>
 					<option name="d">
-						<para>Play <literal>dial</literal> indications tone on channel while waiting
-						for digits.</para>
+						<para>Play indications tone on channel while waiting for digits.</para>
+						<argument name="x">
+							<para>Specify the indications tone to play.
+							Default is <literal>dial</literal> tone.</para>
+						</argument>
 					</option>
 				</optionlist>
 			</parameter>
@@ -828,12 +831,21 @@ AST_APP_OPTIONS(background_opts, {
 	AST_APP_OPTION('p', BACKGROUND_PLAYBACK),
 });
 
-#define WAITEXTEN_MOH		(1 << 0)
-#define WAITEXTEN_DIALTONE	(1 << 1)
+enum {
+	WAITEXTEN_MOH = (1 << 0),
+	WAITEXTEN_DIALTONE = (1 << 1),
+};
+
+enum read_option_flags {
+	WAITEXTEN_ARG_MOH,
+	WAITEXTEN_ARG_DIALTONE,
+	/* note: this entry _MUST_ be the last one in the enum */
+	WAITEXTEN_ARRAY_SIZE,
+};
 
 AST_APP_OPTIONS(waitexten_opts, {
-	AST_APP_OPTION_ARG('m', WAITEXTEN_MOH, 0),
-	AST_APP_OPTION_ARG('d', WAITEXTEN_DIALTONE, 0),
+	AST_APP_OPTION_ARG('m', WAITEXTEN_MOH, WAITEXTEN_ARG_MOH),
+	AST_APP_OPTION_ARG('d', WAITEXTEN_DIALTONE, WAITEXTEN_ARG_DIALTONE),
 });
 
 int pbx_builtin_raise_exception(struct ast_channel *chan, const char *reason)
@@ -1203,7 +1215,7 @@ static int pbx_builtin_waitexten(struct ast_channel *chan, const char *data)
 {
 	int ms, res;
 	struct ast_flags flags = {0};
-	char *opts[1] = { NULL };
+	char *opt_args[WAITEXTEN_ARRAY_SIZE];
 	char *parse;
 	AST_DECLARE_APP_ARGS(args,
 		AST_APP_ARG(timeout);
@@ -1217,15 +1229,17 @@ static int pbx_builtin_waitexten(struct ast_channel *chan, const char *data)
 		memset(&args, 0, sizeof(args));
 
 	if (args.options)
-		ast_app_parse_options(waitexten_opts, &flags, opts, args.options);
+		ast_app_parse_options(waitexten_opts, &flags, opt_args, args.options);
 
-	if (ast_test_flag(&flags, WAITEXTEN_MOH) && !opts[0] ) {
+	if (ast_test_flag(&flags, WAITEXTEN_MOH)) {
+		if (ast_strlen_zero(opt_args[WAITEXTEN_ARG_MOH])) {
 			ast_log(LOG_WARNING, "The 'm' option has been specified for WaitExten without a class.\n");
-	} else if (ast_test_flag(&flags, WAITEXTEN_MOH)) {
-		ast_indicate_data(chan, AST_CONTROL_HOLD, S_OR(opts[0], NULL),
-			!ast_strlen_zero(opts[0]) ? strlen(opts[0]) + 1 : 0);
+		}
+		ast_indicate_data(chan, AST_CONTROL_HOLD, S_OR(opt_args[WAITEXTEN_ARG_MOH], NULL),
+			!ast_strlen_zero(opt_args[WAITEXTEN_ARG_MOH]) ? strlen(opt_args[WAITEXTEN_ARG_MOH]) + 1 : 0);
 	} else if (ast_test_flag(&flags, WAITEXTEN_DIALTONE)) {
-		struct ast_tone_zone_sound *ts = ast_get_indication_tone(ast_channel_zone(chan), "dial");
+		const char *tone = !ast_strlen_zero(opt_args[WAITEXTEN_ARG_DIALTONE]) ? opt_args[WAITEXTEN_ARG_DIALTONE] : "dial";
+		struct ast_tone_zone_sound *ts = ast_get_indication_tone(ast_channel_zone(chan), tone);
 		if (ts) {
 			ast_playtones_start(chan, 0, ts->data, 0);
 			ts = ast_tone_zone_sound_unref(ts);