diff options
| author | Jeremy Sowden <jeremy@azazel.net> | 2020-01-15 20:05:57 +0000 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-01-16 15:52:02 +0100 |
| commit | 567d746b55bc66d3800c9ae91d50f0c5deb2fd93 (patch) | |
| tree | 68eb53ca8df97916a56aeae72a37536f84647b34 /include/uapi/linux/netfilter/nf_tables.h | |
| parent | 779f725e142cd987a69296c0eb7d416ee3ba57dd (diff) | |
netfilter: bitwise: add support for shifts.
Hitherto nft_bitwise has only supported boolean operations: NOT, AND, OR
and XOR. Extend it to do shifts as well.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/uapi/linux/netfilter/nf_tables.h')
| -rw-r--r-- | include/uapi/linux/netfilter/nf_tables.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index 8bef0620bc4f..261864736b26 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -489,9 +489,13 @@ enum nft_immediate_attributes { * * @NFT_BITWISE_BOOL: mask-and-xor operation used to implement NOT, AND, OR and * XOR boolean operations + * @NFT_BITWISE_LSHIFT: left-shift operation + * @NFT_BITWISE_RSHIFT: right-shift operation */ enum nft_bitwise_ops { NFT_BITWISE_BOOL, + NFT_BITWISE_LSHIFT, + NFT_BITWISE_RSHIFT, }; /** @@ -506,11 +510,12 @@ enum nft_bitwise_ops { * @NFTA_BITWISE_DATA: argument for non-boolean operations * (NLA_NESTED: nft_data_attributes) * - * The bitwise expression performs the following operation: + * The bitwise expression supports boolean and shift operations. It implements + * the boolean operations by performing the following operation: * * dreg = (sreg & mask) ^ xor * - * which allow to express all bitwise operations: + * with these mask and xor values: * * mask xor * NOT: 1 1 |