* [PATCH iptables] extensions: libxt_conntrack: provide translation for DNAT and SNAT --ctstate
@ 2020-07-22 11:12 Pablo Neira Ayuso
0 siblings, 0 replies; only message in thread
From: Pablo Neira Ayuso @ 2020-07-22 11:12 UTC (permalink / raw)
To: netfilter-devel
iptables-translate -t filter -A INPUT -m conntrack --ctstate DNAT -j ACCEPT
nft add rule ip filter INPUT ct status dnat counter accept
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
extensions/libxt_conntrack.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/extensions/libxt_conntrack.c b/extensions/libxt_conntrack.c
index 6f3503933e66..7734509c9af8 100644
--- a/extensions/libxt_conntrack.c
+++ b/extensions/libxt_conntrack.c
@@ -1249,11 +1249,19 @@ static int _conntrack3_mt_xlate(struct xt_xlate *xl,
}
if (sinfo->match_flags & XT_CONNTRACK_STATE) {
- xt_xlate_add(xl, "%sct state %s", space,
- sinfo->invert_flags & XT_CONNTRACK_STATE ?
- "!= " : "");
- state_xlate_print(xl, sinfo->state_mask);
- space = " ";
+ if ((sinfo->state_mask & XT_CONNTRACK_STATE_SNAT) ||
+ (sinfo->state_mask & XT_CONNTRACK_STATE_DNAT)) {
+ xt_xlate_add(xl, "%sct status %s%s", space,
+ sinfo->invert_flags & XT_CONNTRACK_STATUS ? "!=" : "",
+ sinfo->state_mask & XT_CONNTRACK_STATE_SNAT ? "snat" : "dnat");
+ space = " ";
+ } else {
+ xt_xlate_add(xl, "%sct state %s", space,
+ sinfo->invert_flags & XT_CONNTRACK_STATE ?
+ "!= " : "");
+ state_xlate_print(xl, sinfo->state_mask);
+ space = " ";
+ }
}
if (sinfo->match_flags & XT_CONNTRACK_STATUS) {
--
2.20.1
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2020-07-22 11:12 [PATCH iptables] extensions: libxt_conntrack: provide translation for DNAT and SNAT --ctstate Pablo Neira Ayuso
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