Add translation for target REJECT to nftables.
Examples:
$ sudo ip6tables-translate -A FORWARD -p TCP --dport 22 -j REJECT --reject-with icmp6-reject-route
nft add rule ip6 filter FORWARD tcp dport 22 counter reject with icmpv6 type reject-route
$ sudo ip6tables-translate -A FORWARD -p TCP --dport 22 -j REJECT --reject-with tcp-reset
nft add rule ip6 filter FORWARD tcp dport 22 counter reject with tcp reset
Signed-off-by: Shivani Bhardwaj <shivanib134@xxxxxxxxx>
---
Changes in v2:
Remove unnecessary if endif block
extensions/libip6t_REJECT.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/extensions/libip6t_REJECT.c b/extensions/libip6t_REJECT.c
index d62f431..3b8431c 100644
--- a/extensions/libip6t_REJECT.c
+++ b/extensions/libip6t_REJECT.c
@@ -17,6 +17,11 @@ struct reject_names {
const char *desc;
};
+struct reject_names_xlate {
+ const char *name;
+ enum ip6t_reject_with with;
+};
+
enum {
O_REJECT_WITH = 0,
};
@@ -124,6 +129,35 @@ static void REJECT_save(const void *ip, const struct xt_entry_target *target)
printf(" --reject-with %s", reject_table[i].name);
}
+static const struct reject_names_xlate reject_table_xlate[] = {
+ {"no-route", IP6T_ICMP6_NO_ROUTE},
+ {"admin-prohibited", IP6T_ICMP6_ADM_PROHIBITED},
+ {"addr-unreachable", IP6T_ICMP6_ADDR_UNREACH},
+ {"port-unreachable", IP6T_ICMP6_PORT_UNREACH},
+ {"tcp reset", IP6T_TCP_RESET},
+ {"policy-fail", IP6T_ICMP6_POLICY_FAIL},
+ {"reject-route", IP6T_ICMP6_REJECT_ROUTE}
+};
+
+static int REJECT_xlate(const struct xt_entry_target *target,
+ struct xt_buf *buf, int numeric)
+{
+ const struct ip6t_reject_info *reject =
+ (const struct ip6t_reject_info *)target->data;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(reject_table_xlate); ++i)
+ if (reject_table_xlate[i].with == reject->with)
+ break;
+ if (reject->with == IP6T_TCP_RESET)
+ xt_buf_add(buf, "reject with %s", reject_table_xlate[i].name);
+ else
+ xt_buf_add(buf, "reject with icmpv6 type %s",
+ reject_table_xlate[i].name);
+
+ return 1;
+}
+
static struct xtables_target reject_tg6_reg = {
.name = "REJECT",
.version = XTABLES_VERSION,
@@ -136,6 +170,7 @@ static struct xtables_target reject_tg6_reg = {
.save = REJECT_save,
.x6_parse = REJECT_parse,
.x6_options = REJECT_opts,
+ .xlate = REJECT_xlate,
};
void _init(void)
--
1.9.1
--
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