netfilter: nft_meta: support for time matching
This patch introduces meta matches in the kernel for time (a UNIX timestamp), day (a day of week, represented as an integer between 0-6), and hour (an hour in the current day, or: number of seconds since midnight). All values are taken as unsigned 64-bit integers. The 'time' keyword is internally converted to nanoseconds by nft in userspace, and hence the timestamp is taken in nanoseconds as well. Signed-off-by: Ander Juaristi <a@juaristi.eus> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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