From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shivani Bhardwaj Subject: [PATCH v2] extensions: libxt_pkttype: Add translation to nft Date: Fri, 25 Dec 2015 20:37:33 +0530 Message-ID: <20151225150733.GA3105@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: netfilter-devel@vger.kernel.org Return-path: Received: from mail-pf0-f169.google.com ([209.85.192.169]:36165 "EHLO mail-pf0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753048AbbLYPHk (ORCPT ); Fri, 25 Dec 2015 10:07:40 -0500 Received: by mail-pf0-f169.google.com with SMTP id 65so36946787pff.3 for ; Fri, 25 Dec 2015 07:07:40 -0800 (PST) Received: from gmail.com ([106.204.178.37]) by smtp.gmail.com with ESMTPSA id t85sm60225381pfa.34.2015.12.25.07.07.37 for (version=TLS1_2 cipher=AES128-SHA bits=128/128); Fri, 25 Dec 2015 07:07:38 -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 --- Changes in v2: Add new structure to remove unneeded parameters extensions/libxt_pkttype.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/extensions/libxt_pkttype.c b/extensions/libxt_pkttype.c index 1ed3b44..9dff248 100644 --- a/extensions/libxt_pkttype.c +++ b/extensions/libxt_pkttype.c @@ -21,6 +21,11 @@ struct pkttypes { const char *help; }; +struct pkttypes_xlate { + const char *name; + unsigned char pkttype; +}; + static const struct pkttypes supported_types[] = { {"unicast", PACKET_HOST, 1, "to us"}, {"broadcast", PACKET_BROADCAST, 1, "to all"}, @@ -115,6 +120,37 @@ static void pkttype_save(const void *ip, const struct xt_entry_match *match) print_pkttype(info); } +static const struct pkttypes_xlate supported_types_xlate[] = { + {"unicast", PACKET_HOST}, + {"broadcast", PACKET_BROADCAST}, + {"multicast", PACKET_MULTICAST}, +}; + +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_xlate); ++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 +162,7 @@ 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