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Make sure return codes match legacy ones at least for a few selected
commands typically used to check ruleset state.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
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To be consistent with legacy iptables, calling -S with a non-existing
chain should lead to an error message. This is how some scripts find out
whether a user-defined chain exists or not.
Make sure doing the same for an existing chain does succeed, even if an
invalid rule number was given.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Legacy iptables uses '-c PCNT BCNT' format in listed rules, nft-variant
used '[PCNT BCNT]' prefix like with iptables-save.
In order to pass the counter format preference along, FMT_C_COUNTS is
introduced and related 'format' checks adjusted.
Since legacy iptables prints the counters between matches and target,
this change affects save_matches_and_target() function. In order to get
access to the rule counters, it's declaration is adjusted to receive
iptables_command_state pointer instead of match, target and jumpto
pointers from the same object.
While being at it, integrate jump to user-defined chain into it as well
since the related code in both callers was almost identical. Though
since different rule flags are used between iptables and ip6tables, pass
a 'goto_flag' boolean instead of the actual 'flags' bitfield.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Legacy ip{,6}tables prints feedback for various commands if in verbose
mode, make sure nft variants do the same.
There is one difference, namely when checking a rule (-C command):
Legacy ip{,6}tables print the rule in any case, nft variants don't in
case the rule wasn't found. Changing this though would require to
populate the nftnl_rule object just for printing, which is probably not
feasible.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Unlike iptables, nftables counts rules in a chain as references to that
chain. Align output of 'iptables-nft -L' with that of legacy iptables by
counting the number of rules in a chain and subtracting that value from
reference count before printing the chain header.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
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