From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shivani Bhardwaj Subject: [PATCH] extensions: libipt_REJECT: Add translation to nft Date: Sun, 27 Dec 2015 10:12:48 +0530 Message-ID: <20151227044248.GA5043@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-f44.google.com ([209.85.220.44]:34326 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754320AbbL0Emz (ORCPT ); Sat, 26 Dec 2015 23:42:55 -0500 Received: by mail-pa0-f44.google.com with SMTP id uo6so71753210pac.1 for ; Sat, 26 Dec 2015 20:42:55 -0800 (PST) Received: from gmail.com ([106.196.170.223]) by smtp.gmail.com with ESMTPSA id r83sm6609054pfa.13.2015.12.26.20.42.52 for (version=TLS1_2 cipher=AES128-SHA bits=128/128); Sat, 26 Dec 2015 20:42:54 -0800 (PST) Content-Disposition: inline Sender: netfilter-devel-owner@vger.kernel.org List-ID: Add translation for target REJECT to nftables. Examples: $ sudo iptables-translate -A FORWARD -p TCP --dport 22 -j REJECT nft add rule ip filter FORWARD tcp dport 22 counter reject with icmp type port-unreachable $ sudo iptables-translate -A FORWARD -p TCP --dport 22 -j REJECT --reject-with icmp-net-unreachable nft add rule ip filter FORWARD tcp dport 22 counter reject with icmp type net-unreachable $ sudo iptables-translate -A FORWARD -p TCP --dport 22 -j REJECT --reject-with tcp-reset nft add rule ip filter FORWARD tcp dport 22 counter reject with tcp reset Signed-off-by: Shivani Bhardwaj --- extensions/libipt_REJECT.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/extensions/libipt_REJECT.c b/extensions/libipt_REJECT.c index 362c65e..28dd6b6 100644 --- a/extensions/libipt_REJECT.c +++ b/extensions/libipt_REJECT.c @@ -24,6 +24,11 @@ struct reject_names { const char *desc; }; +struct reject_names_xlate { + const char *name; + enum ipt_reject_with with; +}; + enum { O_REJECT_WITH = 0, }; @@ -140,6 +145,42 @@ 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[] = { + {"net-unreachable", IPT_ICMP_NET_UNREACHABLE}, + {"host-unreachable", IPT_ICMP_HOST_UNREACHABLE}, + {"prot-unreachable", IPT_ICMP_PROT_UNREACHABLE}, + {"port-unreachable", IPT_ICMP_PORT_UNREACHABLE}, +#if 0 + {"echo-reply", IPT_ICMP_ECHOREPLY}, +#endif + {"net-prohibited", IPT_ICMP_NET_PROHIBITED}, + {"host-prohibited", IPT_ICMP_HOST_PROHIBITED}, + {"tcp reset", IPT_TCP_RESET}, + {"admin-prohibited", IPT_ICMP_ADMIN_PROHIBITED} +}; + +static int REJECT_xlate(const struct xt_entry_target *target, + struct xt_buf *buf, int numeric) +{ + const struct ipt_reject_info *reject + = (const struct ipt_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 == IPT_TCP_RESET) + xt_buf_add(buf, "reject with %s", + reject_table_xlate[i].name); + else + xt_buf_add(buf, "reject with icmp type %s", + reject_table_xlate[i].name); + + return 1; +} + + static struct xtables_target reject_tg_reg = { .name = "REJECT", .version = XTABLES_VERSION, @@ -152,6 +193,7 @@ static struct xtables_target reject_tg_reg = { .save = REJECT_save, .x6_parse = REJECT_parse, .x6_options = REJECT_opts, + .xlate = REJECT_xlate, }; void _init(void) -- 1.9.1