From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shivani Bhardwaj Subject: [PATCH] extensions: libipt_REDIRECT: Add translation to nft Date: Tue, 12 Jan 2016 22:17:54 +0530 Message-ID: <20160112164754.GA3259@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: netfilter-devel@vger.kernel.org Return-path: Received: from mail-pa0-f49.google.com ([209.85.220.49]:35108 "EHLO mail-pa0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759679AbcALQsD (ORCPT ); Tue, 12 Jan 2016 11:48:03 -0500 Received: by mail-pa0-f49.google.com with SMTP id ho8so81608874pac.2 for ; Tue, 12 Jan 2016 08:48:01 -0800 (PST) Received: from gmail.com ([106.201.101.184]) by smtp.gmail.com with ESMTPSA id l14sm31597671pfb.73.2016.01.12.08.47.59 for (version=TLS1_2 cipher=AES128-SHA bits=128/128); Tue, 12 Jan 2016 08:48:00 -0800 (PST) Content-Disposition: inline Sender: netfilter-devel-owner@vger.kernel.org List-ID: 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 --- 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