--- /dev/null
+#ifndef __SESSION_H__
+#define __SESSION_H__
+
+struct agent;
+struct session;
+struct tapi_device;
+
+struct session *session_alloc(struct tapi_device *, struct agent *caller,
+ struct agent *callee, void (*release)(struct session *));
+void session_hangup(struct session *, struct agent *);
+void session_accept(struct session *, struct agent *);
+void session_free(struct session *);
+
+#endif