feature: start to implement responses

include/response.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <stdint.h>
+
+#include "scan.h"
+
+typedef enum {
+	OPEN,
+	CLOSE,
+	FILTERED,
+	UNFILTERED,
+} e_state;
+
+struct response {
+	uint16_t port;
+	e_state state;
+	char *service;
+};
+
+void tcp_response(struct tcphdr *tcp, const struct scan *data);
+void udp_response(struct udphdr *udp, const struct scan *data);