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| author | Arturo Borrero <arturo.borrero.glez@gmail.com> | 2016-06-23 10:24:08 (GMT) |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-06-24 09:03:29 (GMT) |
| commit | 0071e184a535e40ce487528cb04f4690cb0da881 (patch) | |
| tree | 6267df19373697d545ba080be1f3ababaf9e6d5b /include/uapi | |
| parent | 82bec71d46b83f39860e2838ff8394e4fcd6efab (diff) | |
| download | linux-0071e184a535e40ce487528cb04f4690cb0da881.tar.xz | |
netfilter: nf_tables: add support for inverted logic in nft_lookup
Introduce a new configuration option for this expression, which allows users
to invert the logic of set lookups.
In _init() we will now return EINVAL if NFT_LOOKUP_F_INV is in anyway
related to a map lookup.
The code in the _eval() function has been untangled and updated to sopport the
XOR of options, as we should consider 4 cases:
* lookup false, invert false -> NFT_BREAK
* lookup false, invert true -> return w/o NFT_BREAK
* lookup true, invert false -> return w/o NFT_BREAK
* lookup true, invert true -> NFT_BREAK
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/netfilter/nf_tables.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index 6a4dbe0..01751fa 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -546,6 +546,10 @@ enum nft_cmp_attributes { }; #define NFTA_CMP_MAX (__NFTA_CMP_MAX - 1) +enum nft_lookup_flags { + NFT_LOOKUP_F_INV = (1 << 0), +}; + /** * enum nft_lookup_attributes - nf_tables set lookup expression netlink attributes * @@ -553,6 +557,7 @@ enum nft_cmp_attributes { * @NFTA_LOOKUP_SREG: source register of the data to look for (NLA_U32: nft_registers) * @NFTA_LOOKUP_DREG: destination register (NLA_U32: nft_registers) * @NFTA_LOOKUP_SET_ID: uniquely identifies a set in a transaction (NLA_U32) + * @NFTA_LOOKUP_FLAGS: flags (NLA_U32: enum nft_lookup_flags) */ enum nft_lookup_attributes { NFTA_LOOKUP_UNSPEC, @@ -560,6 +565,7 @@ enum nft_lookup_attributes { NFTA_LOOKUP_SREG, NFTA_LOOKUP_DREG, NFTA_LOOKUP_SET_ID, + NFTA_LOOKUP_FLAGS, __NFTA_LOOKUP_MAX }; #define NFTA_LOOKUP_MAX (__NFTA_LOOKUP_MAX - 1) |