From 95df9884027eadbd1479cefd49f290194abbb8d2 Mon Sep 17 00:00:00 2001 From: Shivani Bhardwaj Date: Tue, 12 Jan 2016 22:17:54 +0530 Subject: extensions: libipt_REDIRECT: Add translation to nft 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 Signed-off-by: Pablo Neira Ayuso --- extensions/libipt_REDIRECT.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'extensions') diff --git a/extensions/libipt_REDIRECT.c b/extensions/libipt_REDIRECT.c index 610a9499..2e5b33dd 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) -- cgit v1.2.3