support attributes in session.Content

common/session/session.go

@@ -66,4 +66,20 @@ type Content struct {
 	Protocol string
 
 	SniffingRequest SniffingRequest
+
+	attr map[string]interface{}
+}
+
+func (c *Content) SetAttribute(name string, value interface{}) {
+	if c.attr == nil {
+		c.attr = make(map[string]interface{})
+	}
+	c.attr[name] = value
+}
+
+func (c *Content) Attribute(name string) interface{} {
+	if c.attr == nil {
+		return nil
+	}
+	return c.attr[name]
 }