1 #ifndef _LINUX_NF_TABLES_H
2 #define _LINUX_NF_TABLES_H
4 #define NFT_CHAIN_MAXNAMELEN 32
14 #define NFT_REG_MAX (__NFT_REG_MAX - 1)
17 * enum nft_verdicts - nf_tables internal verdicts
19 * @NFT_CONTINUE: continue evaluation of the current rule
20 * @NFT_BREAK: terminate evaluation of the current rule
21 * @NFT_JUMP: push the current chain on the jump stack and jump to a chain
22 * @NFT_GOTO: jump to a chain without pushing the current chain on the jump stack
23 * @NFT_RETURN: return to the topmost chain on the jump stack
25 * The nf_tables verdicts share their numeric space with the netfilter verdicts.
36 * enum nf_tables_msg_types - nf_tables netlink message types
38 * @NFT_MSG_NEWTABLE: create a new table (enum nft_table_attributes)
39 * @NFT_MSG_GETTABLE: get a table (enum nft_table_attributes)
40 * @NFT_MSG_DELTABLE: delete a table (enum nft_table_attributes)
41 * @NFT_MSG_NEWCHAIN: create a new chain (enum nft_chain_attributes)
42 * @NFT_MSG_GETCHAIN: get a chain (enum nft_chain_attributes)
43 * @NFT_MSG_DELCHAIN: delete a chain (enum nft_chain_attributes)
44 * @NFT_MSG_NEWRULE: create a new rule (enum nft_rule_attributes)
45 * @NFT_MSG_GETRULE: get a rule (enum nft_rule_attributes)
46 * @NFT_MSG_DELRULE: delete a rule (enum nft_rule_attributes)
47 * @NFT_MSG_NEWSET: create a new set (enum nft_set_attributes)
48 * @NFT_MSG_GETSET: get a set (enum nft_set_attributes)
49 * @NFT_MSG_DELSET: delete a set (enum nft_set_attributes)
50 * @NFT_MSG_NEWSETELEM: create a new set element (enum nft_set_elem_attributes)
51 * @NFT_MSG_GETSETELEM: get a set element (enum nft_set_elem_attributes)
52 * @NFT_MSG_DELSETELEM: delete a set element (enum nft_set_elem_attributes)
54 enum nf_tables_msg_types {
74 * enum nft_list_attributes - nf_tables generic list netlink attributes
76 * @NFTA_LIST_ELEM: list element (NLA_NESTED)
78 enum nft_list_attributes {
83 #define NFTA_LIST_MAX (__NFTA_LIST_MAX - 1)
86 * enum nft_hook_attributes - nf_tables netfilter hook netlink attributes
88 * @NFTA_HOOK_HOOKNUM: netfilter hook number (NLA_U32)
89 * @NFTA_HOOK_PRIORITY: netfilter hook priority (NLA_U32)
91 enum nft_hook_attributes {
97 #define NFTA_HOOK_MAX (__NFTA_HOOK_MAX - 1)
100 * enum nft_table_flags - nf_tables table flags
102 * @NFT_TABLE_F_DORMANT: this table is not active
104 enum nft_table_flags {
105 NFT_TABLE_F_DORMANT = 0x1,
109 * enum nft_table_attributes - nf_tables table netlink attributes
111 * @NFTA_TABLE_NAME: name of the table (NLA_STRING)
112 * @NFTA_TABLE_FLAGS: bitmask of enum nft_table_flags (NLA_U32)
114 enum nft_table_attributes {
120 #define NFTA_TABLE_MAX (__NFTA_TABLE_MAX - 1)
123 * enum nft_chain_attributes - nf_tables chain netlink attributes
125 * @NFTA_CHAIN_TABLE: name of the table containing the chain (NLA_STRING)
126 * @NFTA_CHAIN_HANDLE: numeric handle of the chain (NLA_U64)
127 * @NFTA_CHAIN_NAME: name of the chain (NLA_STRING)
128 * @NFTA_CHAIN_HOOK: hook specification for basechains (NLA_NESTED: nft_hook_attributes)
129 * @NFTA_CHAIN_POLICY: numeric policy of the chain (NLA_U32)
130 * @NFTA_CHAIN_USE: number of references to this chain (NLA_U32)
131 * @NFTA_CHAIN_TYPE: type name of the string (NLA_NUL_STRING)
132 * @NFTA_CHAIN_COUNTERS: counter specification of the chain (NLA_NESTED: nft_counter_attributes)
134 enum nft_chain_attributes {
146 #define NFTA_CHAIN_MAX (__NFTA_CHAIN_MAX - 1)
149 * enum nft_rule_attributes - nf_tables rule netlink attributes
151 * @NFTA_RULE_TABLE: name of the table containing the rule (NLA_STRING)
152 * @NFTA_RULE_CHAIN: name of the chain containing the rule (NLA_STRING)
153 * @NFTA_RULE_HANDLE: numeric handle of the rule (NLA_U64)
154 * @NFTA_RULE_EXPRESSIONS: list of expressions (NLA_NESTED: nft_expr_attributes)
155 * @NFTA_RULE_COMPAT: compatibility specifications of the rule (NLA_NESTED: nft_rule_compat_attributes)
156 * @NFTA_RULE_POSITION: numeric handle of the previous rule (NLA_U64)
158 enum nft_rule_attributes {
163 NFTA_RULE_EXPRESSIONS,
168 #define NFTA_RULE_MAX (__NFTA_RULE_MAX - 1)
171 * enum nft_rule_compat_flags - nf_tables rule compat flags
173 * @NFT_RULE_COMPAT_F_INV: invert the check result
175 enum nft_rule_compat_flags {
176 NFT_RULE_COMPAT_F_INV = (1 << 1),
177 NFT_RULE_COMPAT_F_MASK = NFT_RULE_COMPAT_F_INV,
181 * enum nft_rule_compat_attributes - nf_tables rule compat attributes
183 * @NFTA_RULE_COMPAT_PROTO: numerice value of handled protocol (NLA_U32)
184 * @NFTA_RULE_COMPAT_FLAGS: bitmask of enum nft_rule_compat_flags (NLA_U32)
186 enum nft_rule_compat_attributes {
187 NFTA_RULE_COMPAT_UNSPEC,
188 NFTA_RULE_COMPAT_PROTO,
189 NFTA_RULE_COMPAT_FLAGS,
190 __NFTA_RULE_COMPAT_MAX
192 #define NFTA_RULE_COMPAT_MAX (__NFTA_RULE_COMPAT_MAX - 1)
195 * enum nft_set_flags - nf_tables set flags
197 * @NFT_SET_ANONYMOUS: name allocation, automatic cleanup on unlink
198 * @NFT_SET_CONSTANT: set contents may not change while bound
199 * @NFT_SET_INTERVAL: set contains intervals
200 * @NFT_SET_MAP: set is used as a dictionary
203 NFT_SET_ANONYMOUS = 0x1,
204 NFT_SET_CONSTANT = 0x2,
205 NFT_SET_INTERVAL = 0x4,
210 * enum nft_set_attributes - nf_tables set netlink attributes
212 * @NFTA_SET_TABLE: table name (NLA_STRING)
213 * @NFTA_SET_NAME: set name (NLA_STRING)
214 * @NFTA_SET_FLAGS: bitmask of enum nft_set_flags (NLA_U32)
215 * @NFTA_SET_KEY_TYPE: key data type, informational purpose only (NLA_U32)
216 * @NFTA_SET_KEY_LEN: key data length (NLA_U32)
217 * @NFTA_SET_DATA_TYPE: mapping data type (NLA_U32)
218 * @NFTA_SET_DATA_LEN: mapping data length (NLA_U32)
220 enum nft_set_attributes {
231 #define NFTA_SET_MAX (__NFTA_SET_MAX - 1)
234 * enum nft_set_elem_flags - nf_tables set element flags
236 * @NFT_SET_ELEM_INTERVAL_END: element ends the previous interval
238 enum nft_set_elem_flags {
239 NFT_SET_ELEM_INTERVAL_END = 0x1,
243 * enum nft_set_elem_attributes - nf_tables set element netlink attributes
245 * @NFTA_SET_ELEM_KEY: key value (NLA_NESTED: nft_data)
246 * @NFTA_SET_ELEM_DATA: data value of mapping (NLA_NESTED: nft_data_attributes)
247 * @NFTA_SET_ELEM_FLAGS: bitmask of nft_set_elem_flags (NLA_U32)
249 enum nft_set_elem_attributes {
250 NFTA_SET_ELEM_UNSPEC,
256 #define NFTA_SET_ELEM_MAX (__NFTA_SET_ELEM_MAX - 1)
259 * enum nft_set_elem_list_attributes - nf_tables set element list netlink attributes
261 * @NFTA_SET_ELEM_LIST_TABLE: table of the set to be changed (NLA_STRING)
262 * @NFTA_SET_ELEM_LIST_SET: name of the set to be changed (NLA_STRING)
263 * @NFTA_SET_ELEM_LIST_ELEMENTS: list of set elements (NLA_NESTED: nft_set_elem_attributes)
265 enum nft_set_elem_list_attributes {
266 NFTA_SET_ELEM_LIST_UNSPEC,
267 NFTA_SET_ELEM_LIST_TABLE,
268 NFTA_SET_ELEM_LIST_SET,
269 NFTA_SET_ELEM_LIST_ELEMENTS,
270 __NFTA_SET_ELEM_LIST_MAX
272 #define NFTA_SET_ELEM_LIST_MAX (__NFTA_SET_ELEM_LIST_MAX - 1)
275 * enum nft_data_types - nf_tables data types
277 * @NFT_DATA_VALUE: generic data
278 * @NFT_DATA_VERDICT: netfilter verdict
280 * The type of data is usually determined by the kernel directly and is not
281 * explicitly specified by userspace. The only difference are sets, where
282 * userspace specifies the key and mapping data types.
284 * The values 0xffffff00-0xffffffff are reserved for internally used types.
285 * The remaining range can be freely used by userspace to encode types, all
286 * values are equivalent to NFT_DATA_VALUE.
288 enum nft_data_types {
290 NFT_DATA_VERDICT = 0xffffff00U,
293 #define NFT_DATA_RESERVED_MASK 0xffffff00U
296 * enum nft_data_attributes - nf_tables data netlink attributes
298 * @NFTA_DATA_VALUE: generic data (NLA_BINARY)
299 * @NFTA_DATA_VERDICT: nf_tables verdict (NLA_NESTED: nft_verdict_attributes)
301 enum nft_data_attributes {
307 #define NFTA_DATA_MAX (__NFTA_DATA_MAX - 1)
310 * enum nft_verdict_attributes - nf_tables verdict netlink attributes
312 * @NFTA_VERDICT_CODE: nf_tables verdict (NLA_U32: enum nft_verdicts)
313 * @NFTA_VERDICT_CHAIN: jump target chain name (NLA_STRING)
315 enum nft_verdict_attributes {
321 #define NFTA_VERDICT_MAX (__NFTA_VERDICT_MAX - 1)
324 * enum nft_expr_attributes - nf_tables expression netlink attributes
326 * @NFTA_EXPR_NAME: name of the expression type (NLA_STRING)
327 * @NFTA_EXPR_DATA: type specific data (NLA_NESTED)
329 enum nft_expr_attributes {
335 #define NFTA_EXPR_MAX (__NFTA_EXPR_MAX - 1)
338 * enum nft_immediate_attributes - nf_tables immediate expression netlink attributes
340 * @NFTA_IMMEDIATE_DREG: destination register to load data into (NLA_U32)
341 * @NFTA_IMMEDIATE_DATA: data to load (NLA_NESTED: nft_data_attributes)
343 enum nft_immediate_attributes {
344 NFTA_IMMEDIATE_UNSPEC,
349 #define NFTA_IMMEDIATE_MAX (__NFTA_IMMEDIATE_MAX - 1)
352 * enum nft_bitwise_attributes - nf_tables bitwise expression netlink attributes
354 * @NFTA_BITWISE_SREG: source register (NLA_U32: nft_registers)
355 * @NFTA_BITWISE_DREG: destination register (NLA_U32: nft_registers)
356 * @NFTA_BITWISE_LEN: length of operands (NLA_U32)
357 * @NFTA_BITWISE_MASK: mask value (NLA_NESTED: nft_data_attributes)
358 * @NFTA_BITWISE_XOR: xor value (NLA_NESTED: nft_data_attributes)
360 * The bitwise expression performs the following operation:
362 * dreg = (sreg & mask) ^ xor
364 * which allow to express all bitwise operations:
372 enum nft_bitwise_attributes {
381 #define NFTA_BITWISE_MAX (__NFTA_BITWISE_MAX - 1)
384 * enum nft_byteorder_ops - nf_tables byteorder operators
386 * @NFT_BYTEORDER_NTOH: network to host operator
387 * @NFT_BYTEORDER_HTON: host to network opertaor
389 enum nft_byteorder_ops {
395 * enum nft_byteorder_attributes - nf_tables byteorder expression netlink attributes
397 * @NFTA_BYTEORDER_SREG: source register (NLA_U32: nft_registers)
398 * @NFTA_BYTEORDER_DREG: destination register (NLA_U32: nft_registers)
399 * @NFTA_BYTEORDER_OP: operator (NLA_U32: enum nft_byteorder_ops)
400 * @NFTA_BYTEORDER_LEN: length of the data (NLA_U32)
401 * @NFTA_BYTEORDER_SIZE: data size in bytes (NLA_U32: 2 or 4)
403 enum nft_byteorder_attributes {
404 NFTA_BYTEORDER_UNSPEC,
412 #define NFTA_BYTEORDER_MAX (__NFTA_BYTEORDER_MAX - 1)
415 * enum nft_cmp_ops - nf_tables relational operator
418 * @NFT_CMP_NEQ: not equal
419 * @NFT_CMP_LT: less than
420 * @NFT_CMP_LTE: less than or equal to
421 * @NFT_CMP_GT: greater than
422 * @NFT_CMP_GTE: greater than or equal to
434 * enum nft_cmp_attributes - nf_tables cmp expression netlink attributes
436 * @NFTA_CMP_SREG: source register of data to compare (NLA_U32: nft_registers)
437 * @NFTA_CMP_OP: cmp operation (NLA_U32: nft_cmp_ops)
438 * @NFTA_CMP_DATA: data to compare against (NLA_NESTED: nft_data_attributes)
440 enum nft_cmp_attributes {
447 #define NFTA_CMP_MAX (__NFTA_CMP_MAX - 1)
450 * enum nft_lookup_attributes - nf_tables set lookup expression netlink attributes
452 * @NFTA_LOOKUP_SET: name of the set where to look for (NLA_STRING)
453 * @NFTA_LOOKUP_SREG: source register of the data to look for (NLA_U32: nft_registers)
454 * @NFTA_LOOKUP_DREG: destination register (NLA_U32: nft_registers)
456 enum nft_lookup_attributes {
463 #define NFTA_LOOKUP_MAX (__NFTA_LOOKUP_MAX - 1)
466 * enum nft_payload_bases - nf_tables payload expression offset bases
468 * @NFT_PAYLOAD_LL_HEADER: link layer header
469 * @NFT_PAYLOAD_NETWORK_HEADER: network header
470 * @NFT_PAYLOAD_TRANSPORT_HEADER: transport header
472 enum nft_payload_bases {
473 NFT_PAYLOAD_LL_HEADER,
474 NFT_PAYLOAD_NETWORK_HEADER,
475 NFT_PAYLOAD_TRANSPORT_HEADER,
479 * enum nft_payload_attributes - nf_tables payload expression netlink attributes
481 * @NFTA_PAYLOAD_DREG: destination register to load data into (NLA_U32: nft_registers)
482 * @NFTA_PAYLOAD_BASE: payload base (NLA_U32: nft_payload_bases)
483 * @NFTA_PAYLOAD_OFFSET: payload offset relative to base (NLA_U32)
484 * @NFTA_PAYLOAD_LEN: payload length (NLA_U32)
486 enum nft_payload_attributes {
494 #define NFTA_PAYLOAD_MAX (__NFTA_PAYLOAD_MAX - 1)
497 * enum nft_exthdr_attributes - nf_tables IPv6 extension header expression netlink attributes
499 * @NFTA_EXTHDR_DREG: destination register (NLA_U32: nft_registers)
500 * @NFTA_EXTHDR_TYPE: extension header type (NLA_U8)
501 * @NFTA_EXTHDR_OFFSET: extension header offset (NLA_U32)
502 * @NFTA_EXTHDR_LEN: extension header length (NLA_U32)
504 enum nft_exthdr_attributes {
512 #define NFTA_EXTHDR_MAX (__NFTA_EXTHDR_MAX - 1)
515 * enum nft_meta_keys - nf_tables meta expression keys
517 * @NFT_META_LEN: packet length (skb->len)
518 * @NFT_META_PROTOCOL: packet ethertype protocol (skb->protocol), invalid in OUTPUT
519 * @NFT_META_PRIORITY: packet priority (skb->priority)
520 * @NFT_META_MARK: packet mark (skb->mark)
521 * @NFT_META_IIF: packet input interface index (dev->ifindex)
522 * @NFT_META_OIF: packet output interface index (dev->ifindex)
523 * @NFT_META_IIFNAME: packet input interface name (dev->name)
524 * @NFT_META_OIFNAME: packet output interface name (dev->name)
525 * @NFT_META_IIFTYPE: packet input interface type (dev->type)
526 * @NFT_META_OIFTYPE: packet output interface type (dev->type)
527 * @NFT_META_SKUID: originating socket UID (fsuid)
528 * @NFT_META_SKGID: originating socket GID (fsgid)
529 * @NFT_META_NFTRACE: packet nftrace bit
530 * @NFT_META_RTCLASSID: realm value of packet's route (skb->dst->tclassid)
531 * @NFT_META_SECMARK: packet secmark (skb->secmark)
552 * enum nft_meta_attributes - nf_tables meta expression netlink attributes
554 * @NFTA_META_DREG: destination register (NLA_U32)
555 * @NFTA_META_KEY: meta data item to load (NLA_U32: nft_meta_keys)
557 enum nft_meta_attributes {
563 #define NFTA_META_MAX (__NFTA_META_MAX - 1)
566 * enum nft_ct_keys - nf_tables ct expression keys
568 * @NFT_CT_STATE: conntrack state (bitmask of enum ip_conntrack_info)
569 * @NFT_CT_DIRECTION: conntrack direction (enum ip_conntrack_dir)
570 * @NFT_CT_STATUS: conntrack status (bitmask of enum ip_conntrack_status)
571 * @NFT_CT_MARK: conntrack mark value
572 * @NFT_CT_SECMARK: conntrack secmark value
573 * @NFT_CT_EXPIRATION: relative conntrack expiration time in ms
574 * @NFT_CT_HELPER: connection tracking helper assigned to conntrack
575 * @NFT_CT_L3PROTOCOL: conntrack layer 3 protocol
576 * @NFT_CT_SRC: conntrack layer 3 protocol source (IPv4/IPv6 address)
577 * @NFT_CT_DST: conntrack layer 3 protocol destination (IPv4/IPv6 address)
578 * @NFT_CT_PROTOCOL: conntrack layer 4 protocol
579 * @NFT_CT_PROTO_SRC: conntrack layer 4 protocol source
580 * @NFT_CT_PROTO_DST: conntrack layer 4 protocol destination
599 * enum nft_ct_attributes - nf_tables ct expression netlink attributes
601 * @NFTA_CT_DREG: destination register (NLA_U32)
602 * @NFTA_CT_KEY: conntrack data item to load (NLA_U32: nft_ct_keys)
603 * @NFTA_CT_DIRECTION: direction in case of directional keys (NLA_U8)
605 enum nft_ct_attributes {
612 #define NFTA_CT_MAX (__NFTA_CT_MAX - 1)
615 * enum nft_limit_attributes - nf_tables limit expression netlink attributes
617 * @NFTA_LIMIT_RATE: refill rate (NLA_U64)
618 * @NFTA_LIMIT_UNIT: refill unit (NLA_U64)
620 enum nft_limit_attributes {
626 #define NFTA_LIMIT_MAX (__NFTA_LIMIT_MAX - 1)
629 * enum nft_counter_attributes - nf_tables counter expression netlink attributes
631 * @NFTA_COUNTER_BYTES: number of bytes (NLA_U64)
632 * @NFTA_COUNTER_PACKETS: number of packets (NLA_U64)
634 enum nft_counter_attributes {
637 NFTA_COUNTER_PACKETS,
640 #define NFTA_COUNTER_MAX (__NFTA_COUNTER_MAX - 1)
643 * enum nft_log_attributes - nf_tables log expression netlink attributes
645 * @NFTA_LOG_GROUP: netlink group to send messages to (NLA_U32)
646 * @NFTA_LOG_PREFIX: prefix to prepend to log messages (NLA_STRING)
647 * @NFTA_LOG_SNAPLEN: length of payload to include in netlink message (NLA_U32)
648 * @NFTA_LOG_QTHRESHOLD: queue threshold (NLA_U32)
650 enum nft_log_attributes {
658 #define NFTA_LOG_MAX (__NFTA_LOG_MAX - 1)
661 * enum nft_reject_types - nf_tables reject expression reject types
663 * @NFT_REJECT_ICMP_UNREACH: reject using ICMP unreachable
664 * @NFT_REJECT_TCP_RST: reject using TCP RST
666 enum nft_reject_types {
667 NFT_REJECT_ICMP_UNREACH,
672 * enum nft_reject_attributes - nf_tables reject expression netlink attributes
674 * @NFTA_REJECT_TYPE: packet type to use (NLA_U32: nft_reject_types)
675 * @NFTA_REJECT_ICMP_CODE: ICMP code to use (NLA_U8)
677 enum nft_reject_attributes {
680 NFTA_REJECT_ICMP_CODE,
683 #define NFTA_REJECT_MAX (__NFTA_REJECT_MAX - 1)
686 * enum nft_nat_types - nf_tables nat expression NAT types
688 * @NFT_NAT_SNAT: source NAT
689 * @NFT_NAT_DNAT: destination NAT
697 * enum nft_nat_attributes - nf_tables nat expression netlink attributes
699 * @NFTA_NAT_TYPE: NAT type (NLA_U32: nft_nat_types)
700 * @NFTA_NAT_FAMILY: NAT family (NLA_U32)
701 * @NFTA_NAT_REG_ADDR_MIN: source register of address range start (NLA_U32: nft_registers)
702 * @NFTA_NAT_REG_ADDR_MAX: source register of address range end (NLA_U32: nft_registers)
703 * @NFTA_NAT_REG_PROTO_MIN: source register of proto range start (NLA_U32: nft_registers)
704 * @NFTA_NAT_REG_PROTO_MAX: source register of proto range end (NLA_U32: nft_registers)
706 enum nft_nat_attributes {
710 NFTA_NAT_REG_ADDR_MIN,
711 NFTA_NAT_REG_ADDR_MAX,
712 NFTA_NAT_REG_PROTO_MIN,
713 NFTA_NAT_REG_PROTO_MAX,
716 #define NFTA_NAT_MAX (__NFTA_NAT_MAX - 1)
718 #endif /* _LINUX_NF_TABLES_H */