libdnet stripped and integrated, ARP ping scan starting to work pretty well

libdnet-stripped/include/dnet/fw.h

@@ -0,0 +1,54 @@
+/*
+ * fw.h
+ *
+ * Network firewalling operations.
+ *
+ * Copyright (c) 2001 Dug Song <dugsong@monkey.org>
+ *
+ * $Id: fw.h,v 1.13 2002/12/14 04:02:36 dugsong Exp $
+ */
+
+#ifndef DNET_FW_H
+#define DNET_FW_H
+
+struct fw_rule {
+	char		fw_device[INTF_NAME_LEN]; /* interface name */
+	uint8_t		fw_op;			  /* operation */
+	uint8_t		fw_dir;			  /* direction */
+	uint8_t		fw_proto;		  /* IP protocol */
+	struct addr	fw_src;			  /* src address / net */
+	struct addr	fw_dst;			  /* dst address / net */
+	uint16_t	fw_sport[2];		  /* range / ICMP type */
+	uint16_t	fw_dport[2];		  /* range / ICMP code */
+};
+
+#define FW_OP_ALLOW	1
+#define FW_OP_BLOCK	2
+
+#define FW_DIR_IN	1
+#define FW_DIR_OUT	2
+
+#define fw_pack_rule(rule, dev, op, dir, p, s, d, sp1, sp2, dp1, dp2)	\
+do {									\
+	strlcpy((rule)->fw_device, dev, sizeof((rule)->fw_device));	\
+	(rule)->fw_op = op; (rule)->fw_dir = dir;			\
+	(rule)->fw_proto = p;						\
+	memmove(&(rule)->fw_src, &(s), sizeof((rule)->fw_src));		\
+	memmove(&(rule)->fw_dst, &(d), sizeof((rule)->fw_dst));		\
+	(rule)->fw_sport[0] = sp1; (rule)->fw_sport[1] = sp2;		\
+	(rule)->fw_dport[0] = dp1; (rule)->fw_dport[1] = dp2;		\
+} while (0)
+
+typedef struct fw_handle fw_t;
+
+typedef int (*fw_handler)(const struct fw_rule *rule, void *arg);
+
+__BEGIN_DECLS
+fw_t	*fw_open(void);
+int	 fw_add(fw_t *f, const struct fw_rule *rule);
+int	 fw_delete(fw_t *f, const struct fw_rule *rule);
+int	 fw_loop(fw_t *f, fw_handler callback, void *arg);
+fw_t	*fw_close(fw_t *f);
+__END_DECLS
+
+#endif /* DNET_FW_H */