Add translation for target REDIRECT to nftables.
Examples:
$ sudo iptables-translate -t nat -A prerouting -p tcp --dport 80 -j REDIRECT --to-ports 8080
nft add rule ip nat prerouting tcp dport 80 counter redirect to 8080
$ sudo iptables-translate -t nat -A prerouting -p tcp --dport 80 -j REDIRECT --to-ports 8080 --random
nft add rule ip nat prerouting tcp dport 80 counter redirect to 8080 random
Signed-off-by: Shivani Bhardwaj <shivanib134@xxxxxxxxx>
---
extensions/libipt_REDIRECT.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/extensions/libipt_REDIRECT.c b/extensions/libipt_REDIRECT.c
index 610a949..2e5b33d 100644
--- a/extensions/libipt_REDIRECT.c
+++ b/extensions/libipt_REDIRECT.c
@@ -135,6 +135,24 @@ static void REDIRECT_save(const void *ip, const struct xt_entry_target *target)
}
}
+static int REDIRECT_xlate(const struct xt_entry_target *target,
+ struct xt_buf *buf, int numeric)
+{
+ const struct nf_nat_ipv4_multi_range_compat *mr =
+ (const void *)target->data;
+ const struct nf_nat_ipv4_range *r = &mr->range[0];
+
+ if (r->flags & NF_NAT_RANGE_PROTO_SPECIFIED) {
+ xt_buf_add(buf, "redirect to %hu", ntohs(r->min.tcp.port));
+ if (r->max.tcp.port != r->min.tcp.port)
+ xt_buf_add(buf, "-%hu ", ntohs(r->max.tcp.port));
+ if (mr->range[0].flags & NF_NAT_RANGE_PROTO_RANDOM)
+ xt_buf_add(buf, " random ");
+ }
+
+ return 1;
+}
+
static struct xtables_target redirect_tg_reg = {
.name = "REDIRECT",
.version = XTABLES_VERSION,
@@ -147,6 +165,7 @@ static struct xtables_target redirect_tg_reg = {
.print = REDIRECT_print,
.save = REDIRECT_save,
.x6_options = REDIRECT_opts,
+ .xlate = REDIRECT_xlate,
};
void _init(void)
--
1.9.1
--
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