Add translation for hop limit to nftables.
Examples:
$ sudo ip6tables-translate -t nat -A postrouting -m hl --hl-gt 3
nft add rule ip6 nat postrouting ip6 hoplimit gt 3 counter
$ sudo ip6tables-translate -t nat -A postrouting -m hl ! --hl-eq 3
nft add rule ip6 nat postrouting ip6 hoplimit != 3 counter
Signed-off-by: Shivani Bhardwaj <shivanib134@xxxxxxxxx>
---
extensions/libip6t_hl.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/extensions/libip6t_hl.c b/extensions/libip6t_hl.c
index 3559db4..0e13df1 100644
--- a/extensions/libip6t_hl.c
+++ b/extensions/libip6t_hl.c
@@ -97,6 +97,23 @@ static const struct xt_option_entry hl_opts[] = {
};
#undef s
+static int hl_xlate(const struct xt_entry_match *match,
+ struct xt_buf *buf, int numeric)
+{
+ static const char *const op[] = {
+ [IP6T_HL_EQ] = "ip6 hoplimit",
+ [IP6T_HL_NE] = "ip6 hoplimit !=",
+ [IP6T_HL_LT] = "ip6 hoplimit lt",
+ [IP6T_HL_GT] = "ip6 hoplimit gt" };
+
+ const struct ip6t_hl_info *info =
+ (struct ip6t_hl_info *) match->data;
+
+ xt_buf_add(buf, "%s %u ", op[info->mode], info->hop_limit);
+
+ return 1;
+}
+
static struct xtables_match hl_mt6_reg = {
.name = "hl",
.version = XTABLES_VERSION,
@@ -109,6 +126,7 @@ static struct xtables_match hl_mt6_reg = {
.x6_parse = hl_parse,
.x6_fcheck = hl_check,
.x6_options = hl_opts,
+ .xlate = hl_xlate,
};
--
1.9.1
--
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