Add translation for NF Logging to nftables.
Examples:
$ sudo iptables-translate -A OUTPUT -j NFLOG --nflog-group 30
nft add rule ip filter OUTPUT counter log group 30
$ sudo iptables-translate -A FORWARD -j NFLOG --nflog-group 32 --nflog-prefix "Prefix 1.0"
nft add rule ip filter FORWARD counter log prefix \"Prefix 1.0\" log group 32
$ sudo iptables-translate -I INPUT -j NFLOG --nflog-range 256
nft insert rule ip filter INPUT counter log snaplen 256
$ sudo iptables-translate -I INPUT -j NFLOG --nflog-threshold 25
nft insert rule ip filter INPUT counter log queue-threshold 25
Signed-off-by: Shivani Bhardwaj <shivanib134@xxxxxxxxx>
---
extensions/libxt_NFLOG.c | 28 +++++++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/extensions/libxt_NFLOG.c b/extensions/libxt_NFLOG.c
index 448576a..3d05ce0 100644
--- a/extensions/libxt_NFLOG.c
+++ b/extensions/libxt_NFLOG.c
@@ -72,7 +72,7 @@ static void nflog_print(const struct xt_nflog_info *info, char *prefix)
}
static void NFLOG_print(const void *ip, const struct xt_entry_target *target,
- int numeric)
+ int numeric)
{
const struct xt_nflog_info *info = (struct xt_nflog_info *)target->data;
@@ -86,6 +86,31 @@ static void NFLOG_save(const void *ip, const struct xt_entry_target *target)
nflog_print(info, "--");
}
+static void nflog_print_xlate(const struct xt_nflog_info *info,
+ char *prefix, struct xt_buf *buf)
+{
+ if (info->prefix[0] != '\0')
+ xt_buf_add(buf, "%slog prefix \\\"%s\\\" ",
+ prefix, info->prefix);
+ if (info->group)
+ xt_buf_add(buf, "%slog group %u ", prefix, info->group);
+ if (info->len)
+ xt_buf_add(buf, "%slog snaplen %u ", prefix, info->len);
+ if (info->threshold != XT_NFLOG_DEFAULT_THRESHOLD)
+ xt_buf_add(buf, "%slog queue-threshold %u ",
+ prefix, info->threshold);
+}
+
+static int NFLOG_xlate(const struct xt_entry_target *target,
+ struct xt_buf *buf, int numeric)
+{
+ const struct xt_nflog_info *info = (struct xt_nflog_info *)target->data;
+
+ nflog_print_xlate(info, "", buf);
+
+ return 1;
+}
+
static struct xtables_target nflog_target = {
.family = NFPROTO_UNSPEC,
.name = "NFLOG",
@@ -98,6 +123,7 @@ static struct xtables_target nflog_target = {
.print = NFLOG_print,
.save = NFLOG_save,
.x6_options = NFLOG_opts,
+ .xlate = NFLOG_xlate,
};
void _init(void)
--
1.9.1
--
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