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Iptables supports netmasks which are not prefixes to match on (or
ignore) arbitrary bits in an address. Yet nftables' prefix notation is
available for real prefixes only, so translation is not as trivial -
print bitmask syntax for those cases.
Signed-off-by: Phil Sutter <phil@nwl.cc>
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In legacy iptables, only the last plus sign remains special, any
previous ones are taken literally. Therefore xtables-translate must not
replace all of them with asterisk but just the last one.
Fixes: e179e87a1179e ("xtables-translate: Fix for interface name corner-cases")
Signed-off-by: Phil Sutter <phil@nwl.cc>
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There are two special situations xlate_ifname() didn't cover for:
* Interface name containing '*': This went unchanged, creating a command
nft wouldn't accept. Instead translate into '\*' which doesn't change
semantics.
* Interface name being '+': Can't translate into nft wildcard character
as nft doesn't accept asterisk-only interface names. Instead decide
what to do based on 'invert' value: Skip match creation if false,
match against an invalid interface name if true.
Also add a test to make sure future changes to this behaviour are
noticed.
Signed-off-by: Phil Sutter <phil@nwl.cc>
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This uncovered broken translation of ethernet + mask.
Signed-off-by: Florian Westphal <fw@strlen.de>
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This test suite is intended to detect regressions in the translation
infrastructure. The script checks if ip[6]tables-translate produces the
expected output, otherwise it prints the wrong translation and the
expected one.
** Arguments
--all # Show also passed tests
[test] # Run only the specified test file
** Test files structure
Test files are located under extensions directory. Every file contains
tests about specific extension translations. A test file name must end
with ".txlate".
Inside the files, every single test is defined by two consecutive lines:
ip[6]tables-translate command and expected result. One blank line is left
between tests by convention.
e.g.
$ cat extensions/libxt_cpu.txlate
iptables-translate -A INPUT -p tcp --dport 80 -m cpu --cpu 0 -j ACCEPT
nft add rule ip filter INPUT tcp dport 80 cpu 0 counter accept
iptables-translate -A INPUT -p tcp --dport 80 -m cpu ! --cpu 1 -j ACCEPT
nft add rule ip filter INPUT tcp dport 80 cpu != 1 counter accept
Signed-off-by: Pablo M. Bermudo Garay <pablombg@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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