Add translation for the network classifier cgroup to nftables.
Examples:
$ sudo iptables-translate -A input -m cgroup --cgroup 0x100001 -j DROP
nft add rule ip filter input meta cgroup 1048577 counter drop
$ sudo iptables-translate -A input -m cgroup ! --cgroup 0x100001 -j DROP
nft add rule ip filter input meta cgroup != 1048577 counter drop
Signed-off-by: Shivani Bhardwaj <shivanib134@xxxxxxxxx>
---
extensions/libxt_cgroup.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/extensions/libxt_cgroup.c b/extensions/libxt_cgroup.c
index e304e33..dea1417 100644
--- a/extensions/libxt_cgroup.c
+++ b/extensions/libxt_cgroup.c
@@ -48,6 +48,17 @@ static void cgroup_save(const void *ip, const struct xt_entry_match *match)
printf("%s --cgroup %u", info->invert ? " !" : "", info->id);
}
+static int cgroup_xlate(const struct xt_entry_match *match,
+ struct xt_buf *buf, int numeric)
+{
+ const struct xt_cgroup_info *info = (void *) match->data;
+
+ xt_buf_add(buf, "meta cgroup%s %u ",
+ info->invert ? " !=" : "", info->id);
+
+ return 1;
+}
+
static struct xtables_match cgroup_match = {
.family = NFPROTO_UNSPEC,
.name = "cgroup",
@@ -59,6 +70,7 @@ static struct xtables_match cgroup_match = {
.save = cgroup_save,
.x6_parse = cgroup_parse,
.x6_options = cgroup_opts,
+ .xlate = cgroup_xlate,
};
void _init(void)
--
1.9.1
--
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