🦄 refactor(directory structure): restructure and rename src to infra

infra/tuple/tuple.h

@@ -0,0 +1,80 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <arpa/inet.h>
+
+union ip_address
+{
+    struct in_addr v4;  /* network order */
+    struct in6_addr v6; /* network order */
+};
+
+struct tuple2
+{
+    uint32_t addr_family;
+    union ip_address src_addr; /* network order */
+    union ip_address dst_addr; /* network order */
+};
+
+struct tuple4
+{
+    uint32_t addr_family;
+    union ip_address src_addr; /* network order */
+    union ip_address dst_addr; /* network order */
+
+    in_port_t src_port; /* network order */
+    in_port_t dst_port; /* network order */
+};
+
+struct tuple5
+{
+    uint32_t addr_family;
+    union ip_address src_addr; /* network order */
+    union ip_address dst_addr; /* network order */
+
+    in_port_t src_port; /* network order */
+    in_port_t dst_port; /* network order */
+
+    uint16_t ip_proto; /* network order */
+};
+
+struct tuple6
+{
+    uint32_t addr_family;
+    union ip_address src_addr; /* network order */
+    union ip_address dst_addr; /* network order */
+
+    uint16_t src_port; /* network order */
+    uint16_t dst_port; /* network order */
+
+    uint16_t ip_proto; /* network order */
+    uint64_t domain;
+};
+
+uint32_t tuple2_hash(const struct tuple2 *tuple);
+uint32_t tuple4_hash(const struct tuple4 *tuple);
+uint32_t tuple5_hash(const struct tuple5 *tuple);
+uint32_t tuple6_hash(const struct tuple6 *tuple);
+
+int tuple2_cmp(const struct tuple2 *tuple_a, const struct tuple2 *tuple_b);
+int tuple4_cmp(const struct tuple4 *tuple_a, const struct tuple4 *tuple_b);
+int tuple5_cmp(const struct tuple5 *tuple_a, const struct tuple5 *tuple_b);
+int tuple6_cmp(const struct tuple6 *tuple_a, const struct tuple6 *tuple_b);
+
+void tuple2_reverse(const struct tuple2 *in, struct tuple2 *out);
+void tuple4_reverse(const struct tuple4 *in, struct tuple4 *out);
+void tuple5_reverse(const struct tuple5 *in, struct tuple5 *out);
+void tuple6_reverse(const struct tuple6 *in, struct tuple6 *out);
+
+void tuple2_to_str(const struct tuple2 *tuple, char *buf, uint32_t size);
+void tuple4_to_str(const struct tuple4 *tuple, char *buf, uint32_t size);
+void tuple5_to_str(const struct tuple5 *tuple, char *buf, uint32_t size);
+void tuple6_to_str(const struct tuple6 *tuple, char *buf, uint32_t size);
+
+#ifdef __cplusplus
+}
+#endif