1 files changed, 5 insertions, 0 deletions

diff --git a/include/opkele/types.h b/include/opkele/types.h
index 757c0af..8f4bf73 100644
--- a/include/opkele/types.h
+++ b/include/opkele/types.h
@@ -74,48 +74,53 @@ namespace opkele {
              * retrieve the association handle.
              * @return handle
              */
             virtual string handle() const = 0;
             /**
              * retrieve the association type.
              * @return association type
              */
             virtual string assoc_type() const = 0;
             /**
              * retrieve the association secret.
              * @return association secret
              */
             virtual secret_t secret() const = 0; 
             /**
              * retrieve the number of seconds the association expires in.
              * @return seconds till expiration
              */
             virtual int expires_in() const = 0;
             /**
              * check whether the association is stateless.
              * @return true if stateless
              */
             virtual bool stateless() const = 0;
+            /**
+             * check whether the association is expired.
+             * @return true if expired
+             */
+            virtual bool is_expired() const = 0;
     };
 
     /**
      * the auto_ptr<> for association_t object type
      */
     typedef auto_ptr<association_t> assoc_t;
 
     /**
      * request/response parameters map
      */
     class params_t : public map<string,string> {
         public:
 
             /**
              * check whether the parameter is present.
              * @param n the parameter name
              * @return true if yes
              */
             bool has_param(const string& n) const;
             /**
              * retrieve the parameter (const version)
              * @param n the parameter name
              * @return the parameter value
              * @throw failed_lookup if there is no such parameter