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With this patch, all rule-set updates are put in one single batch
of netlink messages that is sent to user-space using the new
nfnetlink batch infrastructure.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We need family dependent built-in table/chain configuration. This
patch is a step forward making nft family independent in
order to support arptables and ebtables compatibility layers.
Signed-off-by: Giuseppe Longo <giuseppelng@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Fix a crash if nft_init fails, it happens if nfnetlink support
is not available in your Linux kernel.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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xtables -m tcp -h
(nil) v1.4.15: ...
^^^^^
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Use new services in nf_tables to support atomic commit.
Commit per table, although we support global commit at once,
call commit for each table to emulate iptables-restore
behaviour by now.
Keep table dormant/wake up code in iptables/nft.c as it can
be used in the future.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds the following utilities:
* xtables
* xtables-restore
* xtables-save
* xtables-config
They all use Patrick's nf_tables infrastructure plus my compatibility
layer.
xtables, xtables-restore and xtables-save are syntax compatible with
ip[6]tables, ip[6]tables-restore and ip[6]tables-save.
Semantics aims to be similar, still the main exception is that there
is no commit operation. Thus, we incrementally add/delete rules without
entire table locking.
The following options are also not yet implemented:
-Z (this requires adding expr->ops->reset(...) so nft_counters can reset
internal state of expressions while dumping it)
-R and -E (this requires adding this feature to nf_tables)
-f (can be implemented with expressions: payload 6 (2-bytes) + bitwise a&b^!b + cmp neq 0)
-IPv6 support.
But those are a matter of time to get them done.
A new utility, xtables-config, is available to register tables and
chains. By default there is a configuration file that adds backward
compatible tables and chains under iptables/etc/xtables.conf. You have
to call this utility first to register tables and chains.
However, it would be possible to automagically register tables and
chains while using xtables and xtables-restore to get similar operation
than with iptables.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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