From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shivani Bhardwaj Subject: [PATCH v2] extensions: libxt_sctp: Add translation to nft Date: Thu, 3 Mar 2016 00:58:48 +0530 Message-ID: <20160302192848.GA683@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-f68.google.com ([209.85.220.68]:36754 "EHLO mail-pa0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751830AbcCBT2z (ORCPT ); Wed, 2 Mar 2016 14:28:55 -0500 Received: by mail-pa0-f68.google.com with SMTP id a7so11360348pax.3 for ; Wed, 02 Mar 2016 11:28:55 -0800 (PST) Received: from gmail.com ([223.176.182.21]) by smtp.gmail.com with ESMTPSA id 83sm35159876pfr.22.2016.03.02.11.28.52 for (version=TLS1_2 cipher=AES128-SHA bits=128/128); Wed, 02 Mar 2016 11:28:53 -0800 (PST) Content-Disposition: inline Sender: netfilter-devel-owner@vger.kernel.org List-ID: Add translation for sctp to nftables. Full translation of this match awaits the support for --chunk-types option. Examples: $ sudo iptables-translate -A INPUT -p sctp --dport 80 -j DROP nft add rule ip filter INPUT sctp dport 80 counter drop $ sudo iptables-translate -A INPUT -p sctp ! --sport 80:100 -j ACCEPT nft add rule ip filter INPUT sctp sport != 80-100 counter accept Signed-off-by: Shivani Bhardwaj --- Changes in v2: Add code to check if flags is set extensions/libxt_sctp.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/extensions/libxt_sctp.c b/extensions/libxt_sctp.c index 56a4cdf..3b0b048 100644 --- a/extensions/libxt_sctp.c +++ b/extensions/libxt_sctp.c @@ -485,6 +485,42 @@ static void sctp_save(const void *ip, const struct xt_entry_match *match) } } +static int sctp_xlate(const struct xt_entry_match *match, + struct xt_xlate *xl, int numeric) +{ + const struct xt_sctp_info *einfo = + (const struct xt_sctp_info *)match->data; + + if (!einfo->flags) + return 0; + + xt_xlate_add(xl, "sctp "); + + if (einfo->flags & XT_SCTP_SRC_PORTS) { + if (einfo->spts[0] != einfo->spts[1]) + xt_xlate_add(xl, "sport%s %u-%u ", + einfo->invflags & XT_SCTP_SRC_PORTS ? " !=" : "", + einfo->spts[0], einfo->spts[1]); + else + xt_xlate_add(xl, "sport%s %u ", + einfo->invflags & XT_SCTP_SRC_PORTS ? " !=" : "", + einfo->spts[0]); + } + + if (einfo->flags & XT_SCTP_DEST_PORTS) { + if (einfo->dpts[0] != einfo->dpts[1]) + xt_xlate_add(xl, "dport%s %u-%u ", + einfo->invflags & XT_SCTP_DEST_PORTS ? " !=" : "", + einfo->dpts[0], einfo->dpts[1]); + else + xt_xlate_add(xl, "dport%s %u ", + einfo->invflags & XT_SCTP_DEST_PORTS ? " !=" : "", + einfo->dpts[0]); + } + + return 1; +} + static struct xtables_match sctp_match = { .name = "sctp", .family = NFPROTO_UNSPEC, @@ -497,6 +533,7 @@ static struct xtables_match sctp_match = { .print = sctp_print, .save = sctp_save, .extra_opts = sctp_opts, + .xlate = sctp_xlate, }; void _init(void) -- 1.9.1