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netfilter: bitwise: add NFTA_BITWISE_OP netlink attribute.

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Add a new bitwise netlink attribute, NFTA_BITWISE_OP, which is set to a
value of a new enum, nft_bitwise_ops.  It describes the type of
operation an expression contains.  Currently, it only has one value:
NFT_BITWISE_BOOL.  More values will be added later to implement shifts.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jeremy Sowden 2020-01-15 20:05:51 +00:00 • committed by Pablo Neira Ayuso
parent 577c734a81
commit 9d1f979986
2 changed files with 28 additions and 0 deletions
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12
include/uapi/linux/netfilter/nf_tables.h
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@ -484,6 +484,16 @@ enum nft_immediate_attributes {
};
#define NFTA_IMMEDIATE_MAX (__NFTA_IMMEDIATE_MAX - 1)
/**
* enum nft_bitwise_ops - nf_tables bitwise operations
*
* @NFT_BITWISE_BOOL: mask-and-xor operation used to implement NOT, AND, OR and
* XOR boolean operations
*/
enum nft_bitwise_ops {
NFT_BITWISE_BOOL,
};
/**
* enum nft_bitwise_attributes - nf_tables bitwise expression netlink attributes
*
@ -492,6 +502,7 @@ enum nft_immediate_attributes {
* @NFTA_BITWISE_LEN: length of operands (NLA_U32)
* @NFTA_BITWISE_MASK: mask value (NLA_NESTED: nft_data_attributes)
* @NFTA_BITWISE_XOR: xor value (NLA_NESTED: nft_data_attributes)
* @NFTA_BITWISE_OP: type of operation (NLA_U32: nft_bitwise_ops)
*
* The bitwise expression performs the following operation:
*
@ -512,6 +523,7 @@ enum nft_bitwise_attributes {
NFTA_BITWISE_LEN,
NFTA_BITWISE_MASK,
NFTA_BITWISE_XOR,
NFTA_BITWISE_OP,
__NFTA_BITWISE_MAX
};
#define NFTA_BITWISE_MAX (__NFTA_BITWISE_MAX - 1)