diff options
| author | Alexander Mikhalitsyn <alexander.mikhalitsyn@virtuozzo.com> | 2021-04-01 16:47:07 +0300 |
|---|---|---|
| committer | Florian Westphal <fw@strlen.de> | 2021-04-02 17:04:34 +0200 |
| commit | 18e334da7363ba186edb1700056e26ded27ca5ba (patch) | |
| tree | 6414b4336a8e9879edcb7bdebda37dd8ebe54dd4 /extensions/libxt_conntrack.txlate | |
| parent | 831f57c7fbdc8d79e34b1d7d81ca6f6a8e6bae87 (diff) | |
extensions: libxt_conntrack: use bitops for state negation
Currently, state_xlate_print function prints statemask as comma-separated sequence of enabled
statemask flags. But if we have inverted conntrack ctstate condition then we have to use more
complex expression because nft not supports syntax like "ct state != related,established".
Reproducer:
$ iptables -A INPUT -d 127.0.0.1/32 -p tcp -m conntrack ! --ctstate RELATED,ESTABLISHED -j DROP
$ nft list ruleset
...
meta l4proto tcp ip daddr 127.0.0.1 ct state != related,established counter packets 0 bytes 0 drop
...
it will fail if we try to load this rule:
$ nft -f nft_test
../nft_test:6:97-97: Error: syntax error, unexpected comma, expecting newline or semicolon
Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: Alexander Mikhalitsyn <alexander.mikhalitsyn@virtuozzo.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'extensions/libxt_conntrack.txlate')
| -rw-r--r-- | extensions/libxt_conntrack.txlate | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/extensions/libxt_conntrack.txlate b/extensions/libxt_conntrack.txlate index d374f8a0..5ab85b17 100644 --- a/extensions/libxt_conntrack.txlate +++ b/extensions/libxt_conntrack.txlate @@ -2,7 +2,10 @@ iptables-translate -t filter -A INPUT -m conntrack --ctstate NEW,RELATED -j ACCE nft add rule ip filter INPUT ct state new,related counter accept ip6tables-translate -t filter -A INPUT -m conntrack ! --ctstate NEW,RELATED -j ACCEPT -nft add rule ip6 filter INPUT ct state != new,related counter accept +nft add rule ip6 filter INPUT ct state & (new|related) == 0 counter accept + +ip6tables-translate -t filter -A INPUT -m conntrack ! --ctstate NEW -j ACCEPT +nft add rule ip6 filter INPUT ct state & new == 0 counter accept iptables-translate -t filter -A INPUT -m conntrack --ctproto UDP -j ACCEPT nft add rule ip filter INPUT ct original protocol 17 counter accept |