diff options
| author | Phil Sutter <phil@nwl.cc> | 2023-01-25 02:01:56 +0100 |
|---|---|---|
| committer | Phil Sutter <phil@nwl.cc> | 2023-01-31 16:29:26 +0100 |
| commit | 27d37863a486352511dac385bde8f3d20526be5b (patch) | |
| tree | d977a53130907f2522eab24d062b879384578ff5 /extensions/libebt_mark.txlate | |
| parent | d6eb6a9fd3878ce4fa01f8d4127f1735988bd07b (diff) | |
ebtables: Refuse unselected targets' options
Unlike legacy, ebtables-nft would allow e.g.:
| -t nat -A PREROUTING --to-dst fe:ed:00:00:ba:be
While the result is correct, it may mislead users into believing
multiple targets are possible per rule. Better follow legacy's behaviour
and reject target options unless they have been "enabled" by a previous
'-j' option.
To achieve this, one needs to distinguish targets from watchers also
attached to 'xtables_targets' and otherwise behaving like regular
matches. Introduce XTABLES_EXT_WATCHER to mark the two.
The above works already, but error messages are misleading when using
the now unsupported syntax since target options have been merged
already. Solve this by not pre-loading the targets at all, code will
just fall back to loading ad '-j' parsing time as iptables does.
Note how this also fixes for 'counter' statement being in wrong position
of ebtables-translate output.
Fixes: fe97f60e5d2a9 ("ebtables-compat: add watchers support")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Diffstat (limited to 'extensions/libebt_mark.txlate')
| -rw-r--r-- | extensions/libebt_mark.txlate | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/extensions/libebt_mark.txlate b/extensions/libebt_mark.txlate index d006e8ac..4ace1a1f 100644 --- a/extensions/libebt_mark.txlate +++ b/extensions/libebt_mark.txlate @@ -1,11 +1,11 @@ -ebtables-translate -A INPUT --mark-set 42 -nft 'add rule bridge filter INPUT meta mark set 0x2a accept counter' +ebtables-translate -A INPUT -j mark --mark-set 42 +nft 'add rule bridge filter INPUT counter meta mark set 0x2a accept' -ebtables-translate -A INPUT --mark-or 42 --mark-target RETURN -nft 'add rule bridge filter INPUT meta mark set meta mark or 0x2a return counter' +ebtables-translate -A INPUT -j mark --mark-or 42 --mark-target RETURN +nft 'add rule bridge filter INPUT counter meta mark set meta mark or 0x2a return' -ebtables-translate -A INPUT --mark-and 42 --mark-target ACCEPT -nft 'add rule bridge filter INPUT meta mark set meta mark and 0x2a accept counter' +ebtables-translate -A INPUT -j mark --mark-and 42 --mark-target ACCEPT +nft 'add rule bridge filter INPUT counter meta mark set meta mark and 0x2a accept' -ebtables-translate -A INPUT --mark-xor 42 --mark-target DROP -nft 'add rule bridge filter INPUT meta mark set meta mark xor 0x2a drop counter' +ebtables-translate -A INPUT -j mark --mark-xor 42 --mark-target DROP +nft 'add rule bridge filter INPUT counter meta mark set meta mark xor 0x2a drop' |