Add accessor to get ICE session state.

include/mediastreamer2/ice.h

@@ -269,13 +269,21 @@ MS2_PUBLIC const char * ice_session_remote_ufrag(const IceSession *session);
  */
 MS2_PUBLIC const char * ice_session_remote_pwd(const IceSession *session);
 
+/**
+ * Get the state of an ICE session.
+ *
+ * @param session A pointer to a session
+ * @return The state of the session
+ */
+MS2_PUBLIC IceSessionState ice_session_state(const IceSession *session);
+
 /**
  * Gte the role of the agent for an ICE session.
  *
  * @param session A pointer to a session
  * @return The role of the agent for the session
  */
-MS2_PUBLIC IceRole ice_session_role(IceSession *session);
+MS2_PUBLIC IceRole ice_session_role(const IceSession *session);
 
 /**
  * Set the role of the agent for an ICE session.

src/ice.c

@@ -474,7 +474,12 @@ static void ice_session_compute_pair_priorities(IceSession *session)
 	ms_list_for_each(session->streams, (void (*)(void*))ice_check_list_compute_pair_priorities);
 }
 
-IceRole ice_session_role(IceSession *session)
+IceSessionState ice_session_state(const IceSession *session)
+{
+	return session->state;
+}
+
+IceRole ice_session_role(const IceSession *session)
 {
 	return session->role;
 }