1 files changed, 28 insertions, 0 deletions
diff --git a/include/expr_ops.h b/include/expr_ops.h
new file mode 100644
index 0000000..a7d747a
--- /dev/null
+++ b/include/expr_ops.h
@@ -0,0 +1,28 @@
+#ifndef _EXPR_OPS_H_
+#define _EXPR_OPS_H_
+
+#include <stdint.h>
+#include "internal.h"
+
+struct nlattr;
+struct nlmsghdr;
+struct nftnl_expr;
+
+struct expr_ops {
+	const char *name;
+	uint32_t alloc_len;
+	int	max_attr;
+	void	(*init)(const struct nftnl_expr *e);
+	void	(*free)(const struct nftnl_expr *e);
+	int	(*set)(struct nftnl_expr *e, uint16_t type, const void *data, uint32_t data_len);
+	const void *(*get)(const struct nftnl_expr *e, uint16_t type, uint32_t *data_len);
+	int 	(*parse)(struct nftnl_expr *e, struct nlattr *attr);
+	void	(*build)(struct nlmsghdr *nlh, const struct nftnl_expr *e);
+	int	(*output)(char *buf, size_t len, uint32_t flags, const struct nftnl_expr *e);
+};
+
+struct expr_ops *nftnl_expr_ops_lookup(const char *name);
+
+#define nftnl_expr_data(ops) (void *)ops->data
+
+#endif