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-rw-r--r--misc/freeswitch/scripts/dialplan/router.lua20
1 files changed, 18 insertions, 2 deletions
diff --git a/misc/freeswitch/scripts/dialplan/router.lua b/misc/freeswitch/scripts/dialplan/router.lua
index c2b229d..b762010 100644
--- a/misc/freeswitch/scripts/dialplan/router.lua
+++ b/misc/freeswitch/scripts/dialplan/router.lua
@@ -278,8 +278,24 @@ end
function Router.fun_expression(self, expression_str)
- expression_str = expression_str:gsub('[^%d%.%+%(%)%^%%%*%/-<>]', '');
- result = loadstring("return (" .. expression_str .. ")")();
+ if common.str.blank(expression_str) then
+ self.log:error('EXPRESSION - no expression specified');
+ return false;
+ end
+
+ expression_str = expression_str:gsub('[^%d%.%+%(%)%^%%%*%/-<>=!|&]', '');
+ expression_str = expression_str:gsub('&&', ' and ');
+ expression_str = expression_str:gsub('||', ' or ');
+ expression_str = expression_str:gsub('!=', '~=');
+
+ local expression = loadstring("return (" .. expression_str .. ")")
+
+ if not expression then
+ self.log:error('EXPRESSION - invalid expression: ', expression_str);
+ return false;
+ end
+
+ result = expression();
if result then
return true, result;
else