From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shivani Bhardwaj Subject: [PATCH] extensions: libxt_pkttype: Add translation to nft Date: Wed, 23 Dec 2015 23:00:25 +0530 Message-ID: <20151223173024.GA2450@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]:34262 "EHLO mail-pa0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933078AbbLWRab (ORCPT ); Wed, 23 Dec 2015 12:30:31 -0500 Received: by mail-pa0-f49.google.com with SMTP id uo6so30989824pac.1 for ; Wed, 23 Dec 2015 09:30:31 -0800 (PST) Received: from gmail.com ([223.176.154.121]) by smtp.gmail.com with ESMTPSA id wo3sm53936566pab.25.2015.12.23.09.30.28 for (version=TLS1_2 cipher=AES128-SHA bits=128/128); Wed, 23 Dec 2015 09:30:30 -0800 (PST) Content-Disposition: inline Sender: netfilter-devel-owner@vger.kernel.org List-ID: Add translation for packet type to nftables. Examples: $ sudo iptables-translate -A INPUT -m pkttype --pkt-type broadcast -j DROP nft add rule ip filter INPUT pkttype broadcast counter drop $ sudo iptables-translate -A INPUT -m pkttype ! --pkt-type unicast -j DROP nft add rule ip filter INPUT pkttype != unicast counter drop Signed-off-by: Shivani Bhardwaj --- extensions/libxt_pkttype.c | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) diff --git a/extensions/libxt_pkttype.c b/extensions/libxt_pkttype.c index 1ed3b44..6b91e8a 100644 --- a/extensions/libxt_pkttype.c +++ b/extensions/libxt_pkttype.c @@ -102,7 +102,7 @@ static void pkttype_print(const void *ip, const struct xt_entry_match *match, int numeric) { const struct xt_pkttype_info *info = (const void *)match->data; - + printf(" PKTTYPE %s= ", info->invert ? "!" : ""); print_pkttype(info); } @@ -110,11 +110,42 @@ static void pkttype_print(const void *ip, const struct xt_entry_match *match, static void pkttype_save(const void *ip, const struct xt_entry_match *match) { const struct xt_pkttype_info *info = (const void *)match->data; - + printf("%s --pkt-type ", info->invert ? " !" : ""); print_pkttype(info); } +static const struct pkttypes supported_types_xlate[] = { + {"unicast", PACKET_HOST, 1, "to us"}, + {"broadcast", PACKET_BROADCAST, 1, "to all"}, + {"multicast", PACKET_MULTICAST, 1, "to group"}, + }; + +static void print_pkttype_xlate(const struct xt_pkttype_info *info, + struct xt_buf *buf) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(supported_types); ++i) + if (supported_types_xlate[i].pkttype == info->pkttype) { + xt_buf_add(buf, "%s ", supported_types_xlate[i].name); + return; + } + + xt_buf_add(buf, "%d", info->pkttype); +} + +static int pkttype_xlate(const struct xt_entry_match *match, + struct xt_buf *buf, int numeric) +{ + const struct xt_pkttype_info *info = (const void *)match->data; + + xt_buf_add(buf, "pkttype%s ", info->invert ? " !=" : ""); + print_pkttype_xlate(info, buf); + + return 1; +} + static struct xtables_match pkttype_match = { .family = NFPROTO_UNSPEC, .name = "pkttype", @@ -126,6 +157,7 @@ static struct xtables_match pkttype_match = { .save = pkttype_save, .x6_parse = pkttype_parse, .x6_options = pkttype_opts, + .xlate = pkttype_xlate, }; void _init(void) -- 1.9.1