Initial commitv0.01-alpha1

1 files changed, 156 insertions, 0 deletions

diff --git a/include/datatype.h b/include/datatype.h
new file mode 100644
index 00000000..c6aeeeda
--- /dev/null
+++ b/include/datatype.h
@@ -0,0 +1,156 @@
+#ifndef _DATATYPE_H
+#define _DATATYPE_H
+
+/**
+ * enum datatypes
+ *
+ * @TYPE_INVALID:	uninitialized
+ * @TYPE_VERDICT:	nftables verdict
+ * @TYPE_BITMASK:	bitmask
+ * @TYPE_INTEGER:	integer
+ * @TYPE_STRING:	string
+ * @TYPE_LLADDR:	link layer address (integer subtype)
+ * @TYPE_IPADDR:	IPv4 address (integer subtype)
+ * @TYPE_IP6ADDR:	IPv6 address (integer subtype)
+ * @TYPE_ETHERTYPE:	EtherType (integer subtype)
+ * @TYPE_ARPOP:		ARP operation (integer subtype)
+ * @TYPE_INET_PROTOCOL:	internet protocol (integer subtype)
+ * @TYPE_INET_SERVICE:	internet service (integer subtype)
+ * @TYPE_ICMP_TYPE:	ICMP type codes (integer subtype)
+ * @TYPE_TCP_FLAG:	TCP flag (bitmask subtype)
+ * @TYPE_MH_TYPE:	Mobility Header type (integer subtype)
+ * @TYPE_TIME:		relative time
+ * @TYPE_MARK:		packet mark (integer subtype)
+ * @TYPE_IFINDEX:	interface index (integer subtype)
+ * @TYPE_ARPHRD:	interface type (integer subtype)
+ * @TYPE_REALM:		routing realm (integer subtype)
+ * @TYPE_TC_HANDLE:	TC handle (integer subtype)
+ * @TYPE_UID:		user ID (integer subtype)
+ * @TYPE_GID:		group ID (integer subtype)
+ * @TYPE_CT_STATE:	conntrack state (bitmask subtype)
+ * @TYPE_CT_DIR:	conntrack direction
+ * @TYPE_CT_STATUS:	conntrack status (bitmask subtype)
+ */
+enum datatypes {
+	TYPE_INVALID,
+	TYPE_VERDICT,
+	TYPE_BITMASK,
+	TYPE_INTEGER,
+	TYPE_STRING,
+	TYPE_LLADDR,
+	TYPE_IPADDR,
+	TYPE_IP6ADDR,
+	TYPE_ETHERTYPE,
+	TYPE_ARPOP,
+	TYPE_INET_PROTOCOL,
+	TYPE_INET_SERVICE,
+	TYPE_ICMP_TYPE,
+	TYPE_TCP_FLAG,
+	TYPE_MH_TYPE,
+	TYPE_TIME,
+	TYPE_MARK,
+	TYPE_IFINDEX,
+	TYPE_ARPHRD,
+	TYPE_REALM,
+	TYPE_TC_HANDLE,
+	TYPE_UID,
+	TYPE_GID,
+	TYPE_CT_STATE,
+	TYPE_CT_DIR,
+	TYPE_CT_STATUS,
+};
+
+/**
+ * enum byteorder
+ *
+ * @BYTEORDER_INVALID:		uninitialized/unknown
+ * @BYTEORDER_HOST_ENDIAN:	host endian
+ * @BYTEORDER_BIG_ENDIAN:	big endian
+ */
+enum byteorder {
+	BYTEORDER_INVALID,
+	BYTEORDER_HOST_ENDIAN,
+	BYTEORDER_BIG_ENDIAN,
+};
+
+struct expr;
+
+/**
+ * struct datatype
+ *
+ * @type:	numeric identifier
+ * @name:	type name for diagnostics
+ * @basetype:	basetype for subtypes, determines type compatibilty
+ * @basefmt:	format string for basetype
+ * @print:	function to print a constant of this type
+ * @parse:	function to parse a symbol and return an expression
+ * @sym_tbl:	symbol table for this type
+ */
+struct datatype {
+	enum datatypes			type;
+	const char			*name;
+	const struct datatype		*basetype;
+	const char			*basefmt;
+	void				(*print)(const struct expr *expr);
+	struct error_record		*(*parse)(const struct expr *sym,
+						  struct expr **res);
+	const struct symbol_table	*sym_tbl;
+};
+
+extern struct error_record *symbol_parse(const struct expr *sym,
+					 struct expr **res);
+extern void datatype_print(const struct expr *expr);
+
+/**
+ * struct symbolic_constant - symbol <-> constant mapping
+ *
+ * @identifier:	symbol
+ * @value:	symbolic value
+ */
+struct symbolic_constant {
+	const char			*identifier;
+	uint64_t			value;
+};
+
+#define SYMBOL(id, v)	{ .identifier = (id), .value = (v) }
+#define SYMBOL_LIST_END	(struct symbolic_constant) { }
+
+/**
+ * struct symbol_table - type construction from symbolic values
+ *
+ * @byteorder:	byteorder of symbol values
+ * @size:	size of symbol values
+ * @symbols:	the symbols
+ */
+struct symbol_table {
+	enum byteorder			byteorder;
+	unsigned int			size;
+	struct symbolic_constant	symbols[];
+};
+
+extern struct error_record *symbolic_constant_parse(const struct expr *sym,
+						    const struct symbol_table *tbl,
+						    struct expr **res);
+extern void symbolic_constant_print(const struct symbol_table *tbl,
+				    const struct expr *expr);
+extern void symbol_table_print(const struct symbol_table *tbl);
+
+extern struct symbol_table *rt_symbol_table_init(const char *filename);
+extern void rt_symbol_table_free(struct symbol_table *tbl);
+
+extern const struct datatype invalid_type;
+extern const struct datatype verdict_type;
+extern const struct datatype bitmask_type;
+extern const struct datatype integer_type;
+extern const struct datatype string_type;
+extern const struct datatype lladdr_type;
+extern const struct datatype ipaddr_type;
+extern const struct datatype ip6addr_type;
+extern const struct datatype ethertype_type;
+extern const struct datatype arphrd_type;
+extern const struct datatype inet_protocol_type;
+extern const struct datatype inet_service_type;
+extern const struct datatype mark_type;
+extern const struct datatype time_type;
+
+#endif /* _DATATYPE_H */