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netfilter: nf_tables: add userdata attributes to nft_table

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Enables storing userdata for nft_table. Field udata points to user data
and udlen store its length.

Adds new attribute flag NFTA_TABLE_USERDATA

Signed-off-by: Jose M. Guisado Gomez <guigom@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jose M. Guisado Gomez
2020-08-20 10:19:01 +02:00
committed by Pablo Neira Ayuso
parent c5a8a8498e
commit 7a81575b80
3 changed files with 25 additions and 1 deletions
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2
include/uapi/linux/netfilter/nf_tables.h
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@@ -172,6 +172,7 @@ enum nft_table_flags {
* @NFTA_TABLE_NAME: name of the table (NLA_STRING)
* @NFTA_TABLE_FLAGS: bitmask of enum nft_table_flags (NLA_U32)
* @NFTA_TABLE_USE: number of chains in this table (NLA_U32)
* @NFTA_TABLE_USERDATA: user data (NLA_BINARY)
*/
enum nft_table_attributes {
NFTA_TABLE_UNSPEC,
@@ -180,6 +181,7 @@ enum nft_table_attributes {
NFTA_TABLE_USE,
NFTA_TABLE_HANDLE,
NFTA_TABLE_PAD,
NFTA_TABLE_USERDATA,
__NFTA_TABLE_MAX
};
#define NFTA_TABLE_MAX (__NFTA_TABLE_MAX - 1)