@@ -241,6 +241,55 @@ static void SNAT_save(const void *ip, const struct xt_entry_target *target)
printf(" --persistent");
}
+static void print_range_xlate(const struct nf_nat_range *range,
+ struct xt_buf *buf)
+{
+ if (range->flags & NF_NAT_RANGE_MAP_IPS) {
+ xt_buf_add(buf, "%s",
+ xtables_ip6addr_to_numeric(&range->min_addr.in6));
+
+ if (memcmp(&range->min_addr, &range->max_addr,
+ sizeof(range->min_addr)))
+ xt_buf_add(buf, "-%s",
+ xtables_ip6addr_to_numeric(&range->max_addr.in6));
+ }
+ if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) {
+ xt_buf_add(buf, " :%hu", ntohs(range->min_proto.tcp.port));
+
+ if (range->max_proto.tcp.port != range->min_proto.tcp.port)
+ xt_buf_add(buf, "-%hu",
+ ntohs(range->max_proto.tcp.port));
+ }
+}
+
+static int SNAT_xlate(const struct xt_entry_target *target,
+ struct xt_buf *buf, int numeric)
+{
+ const struct nf_nat_range *range = (const void *)target->data;
+ bool sep_need = false;
+ const char *sep = " ";
+
+ xt_buf_add(buf, "snat ");
+ print_range_xlate(range, buf);
+ if (range->flags & NF_NAT_RANGE_PROTO_RANDOM) {
+ xt_buf_add(buf, " random");
+ sep_need = true;
+ }
+ if (range->flags & NF_NAT_RANGE_PROTO_RANDOM_FULLY) {
+ if (sep_need)
+ sep = ",";
+ xt_buf_add(buf, "%sfully-random", sep);
+ sep_need = true;
+ }
+ if (range->flags & NF_NAT_RANGE_PERSISTENT) {
+ if (sep_need)
+ sep = ",";
+ xt_buf_add(buf, "%spersistent", sep);
+ }
+
+ return 1;
+}
+
static struct xtables_target snat_tg_reg = {
.name = "SNAT",
.version = XTABLES_VERSION,
@@ -254,6 +303,7 @@ static struct xtables_target snat_tg_reg = {
.print = SNAT_print,
.save = SNAT_save,
.x6_options = SNAT_opts,
+ .xlate = SNAT_xlate,
};
void _init(void)
Add translation for SNAT target to nftables. Examples: $ sudo ip6tables-translate -t nat -A postrouting -o eth0 -p tcp -j SNAT --to [fec0::1234]:80 nft add rule ip6 nat postrouting oifname eth0 ip6 nexthdr tcp counter snat fec0::1234 :80 $ sudo ip6tables-translate -t nat -A postrouting -o eth0 -p tcp -j SNAT --to [fec0::1234]:1-20 nft add rule ip6 nat postrouting oifname eth0 ip6 nexthdr tcp counter snat fec0::1234 :1-20 $ sudo ip6tables-translate -t nat -A postrouting -o eth0 -p tcp -j SNAT --to [fec0::1234]:123 --random nft add rule ip6 nat postrouting oifname eth0 ip6 nexthdr tcp counter snat fec0::1234 :123 random $ sudo ip6tables-translate -t nat -A postrouting -o eth0 -p tcp -j SNAT --to [fec0::1234]:123 --random-fully --persistent nft add rule ip6 nat postrouting oifname eth0 ip6 nexthdr tcp counter snat fec0::1234 :123 fully-random,persistent Signed-off-by: Shivani Bhardwaj <shivanib134@gmail.com> --- extensions/libip6t_SNAT.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+)