--- /dev/null
+/** @file crule.h
+ * @brief Interfaces and declarations for connection rule checking.
+ * @version $Id$
+ */
+#ifndef INCLUDED_crule_h
+#define INCLUDED_crule_h
+
+/*
+ * Proto types
+ */
+
+/*
+ * opaque node pointer
+ */
+struct CRuleNode;
+
+extern void crule_free(struct CRuleNode** elem);
+extern int crule_eval(struct CRuleNode* rule);
+extern struct CRuleNode* crule_parse(const char* rule);
+
+#endif /* INCLUDED_crule_h */