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Adapt the current code to use the new library name libnftnl.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch allows nft to put all rule update messages into one
single batch that is sent to the kernel if `-f' option is used.
In order to provide fine grain error reporting, I decided to
to correlate the netlink message sequence number with the
correspoding command sequence number, which is the same. Thus,
nft can identify what rules trigger problems inside a batch
and report them accordingly.
Moreover, to avoid playing buffer size games at batch building
stage, ie. guess what is the final size of the batch for this
ruleset update will be, this patch collects batch pages that
are converted to iovec to ensure linearization when the batch
is sent to the kernel. This reduces the amount of unnecessary
memory usage that is allocated for the batch.
This patch uses the libmnl nlmsg batching infrastructure and it
requires the kernel patch entitled (netfilter: nfnetlink: add batch
support and use it from nf_tables).
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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According to libnftables change 437d610, now the length obtained
via getter function is uint32_t, not size_t anymore.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch migrates nft to use the libnftables library, that is used
by the iptables over nftables compat utility as well. Most of the
conversion was pretty straight forward. Some small significant changes
happened in the handling of set element and immediate data abstraction
that libnl provides. libnftables is a bit more granular since it splits
the struct nfnl_nft_data into three attributes: verdict, chain and plain
data (used in maps).
I have added a new file src/mnl.c that contains the low level netlink
communication that now resides in nftables source tree instead of
the library. This should help to implement the batching support using
libmnl in follow up patches.
I also spent some significant amount of time running my tests to make
sure that we don't increase the number of bugs that we already have
(I plan to provide a list of those that I have detected and diagnosed,
so anyone else can help us to fix them).
As a side effect, this change should also prepare the ground for
JSON and XML support anytime soon.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Improve error reporting by always using a location in netlink operations.
Signed-off-by: Patrick McHardy<kaber@trash.net>
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Signed-off-by: Patrick McHardy <kaber@trash.net>
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Signed-off-by: Patrick McHardy <kaber@trash.net>
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Signed-off-by: Patrick McHardy <kaber@trash.net>
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Move the data related function to netlink.c as they're going to be needed
outside of rule context for set maintenance.
Signed-off-by: Patrick McHardy <kaber@trash.net>
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Signed-off-by: Patrick McHardy <kaber@trash.net>
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