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>
---
Changes in v2:
Alter the contents of array op
extensions/libip6t_hl.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/extensions/libip6t_hl.c b/extensions/libip6t_hl.c
index 3559db4..226b69c 100644
--- a/extensions/libip6t_hl.c
+++ b/extensions/libip6t_hl.c
@@ -83,6 +83,23 @@ static void hl_save(const void *ip, const struct xt_entry_match *match)
printf(" %s %u", op[info->mode], info->hop_limit);
}
+static int hl_xlate(const struct xt_entry_match *match,
+ struct xt_buf *buf, int numeric)
+{
+ static const char *const op[] = {
+ [IP6T_HL_EQ] = "",
+ [IP6T_HL_NE] = "!= ",
+ [IP6T_HL_LT] = "lt ",
+ [IP6T_HL_GT] = "gt " };
+
+ const struct ip6t_hl_info *info =
+ (struct ip6t_hl_info *) match->data;
+
+ xt_buf_add(buf, "ip6 hoplimit %s%u ", op[info->mode], info->hop_limit);
+
+ return 1;
+}
+
#define s struct ip6t_hl_info
static const struct xt_option_entry hl_opts[] = {
{.name = "hl-lt", .id = O_HL_LT, .excl = F_ANY, .type = XTTYPE_UINT8,
@@ -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
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
