From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shivani Bhardwaj Subject: [PATCH v2] extensions: libip6t_hl: Add translation to nft Date: Tue, 12 Jan 2016 19:58:29 +0530 Message-ID: <20160112142829.GA5879@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-f195.google.com ([209.85.192.195]:33528 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762521AbcALO2g (ORCPT ); Tue, 12 Jan 2016 09:28:36 -0500 Received: by mail-pf0-f195.google.com with SMTP id e65so4923208pfe.0 for ; Tue, 12 Jan 2016 06:28:36 -0800 (PST) Received: from gmail.com ([106.204.22.198]) by smtp.gmail.com with ESMTPSA id 11sm30942224pfq.87.2016.01.12.06.28.34 for (version=TLS1_2 cipher=AES128-SHA bits=128/128); Tue, 12 Jan 2016 06:28:35 -0800 (PST) Content-Disposition: inline Sender: netfilter-devel-owner@vger.kernel.org List-ID: Add translation for hop limit to nftables. Examples: $ sudo ip6tables-translate -t nat -A postrouting -m hl --hl-gt 3 nft add rule ip6 nat postrouting ip6 hoplimit gt 3 counter $ sudo ip6tables-translate -t nat -A postrouting -m hl ! --hl-eq 3 nft add rule ip6 nat postrouting ip6 hoplimit != 3 counter Signed-off-by: Shivani Bhardwaj --- Changes in v2: Alter the contents of array op extensions/libip6t_hl.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/extensions/libip6t_hl.c b/extensions/libip6t_hl.c index 3559db4..226b69c 100644 --- a/extensions/libip6t_hl.c +++ b/extensions/libip6t_hl.c @@ -83,6 +83,23 @@ static void hl_save(const void *ip, const struct xt_entry_match *match) printf(" %s %u", op[info->mode], info->hop_limit); } +static int hl_xlate(const struct xt_entry_match *match, + struct xt_buf *buf, int numeric) +{ + static const char *const op[] = { + [IP6T_HL_EQ] = "", + [IP6T_HL_NE] = "!= ", + [IP6T_HL_LT] = "lt ", + [IP6T_HL_GT] = "gt " }; + + const struct ip6t_hl_info *info = + (struct ip6t_hl_info *) match->data; + + xt_buf_add(buf, "ip6 hoplimit %s%u ", op[info->mode], info->hop_limit); + + return 1; +} + #define s struct ip6t_hl_info static const struct xt_option_entry hl_opts[] = { {.name = "hl-lt", .id = O_HL_LT, .excl = F_ANY, .type = XTTYPE_UINT8, @@ -109,6 +126,7 @@ static struct xtables_match hl_mt6_reg = { .x6_parse = hl_parse, .x6_fcheck = hl_check, .x6_options = hl_opts, + .xlate = hl_xlate, }; -- 1.9.1