From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shyam Saini Subject: [PATCHv2] extensions: libxt_cluster: Add translation to nft Date: Tue, 30 May 2017 13:55:34 +0530 Message-ID: <1496132734-3829-1-git-send-email-mayhs11saini@gmail.com> Cc: pablo@netfilter.org, arturo@debian.org, fw@strlen.de, Shyam Saini To: netfilter-devel@vger.kernel.org Return-path: Received: from mail-pf0-f196.google.com ([209.85.192.196]:32944 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750896AbdE3I0Z (ORCPT ); Tue, 30 May 2017 04:26:25 -0400 Received: by mail-pf0-f196.google.com with SMTP id f27so16350529pfe.0 for ; Tue, 30 May 2017 01:26:25 -0700 (PDT) Sender: netfilter-devel-owner@vger.kernel.org List-ID: Add translation for cluster match to nftables $ sudo iptables-translate -A PREROUTING -t mangle -i eth1 -m cluster --cluster-total-nodes 2 --cluster-local-node 1 --cluster-hash-seed 0xdeadbeef -j MARK --set-mark 0xffff nft add rule ip mangle PREROUTING iifname eth1 jhash ct original saddr mod 2 seed 0xdeadbeef eq 0 meta pkttype set host counter meta mark set 0xffff $ sudo iptables-translate -A PREROUTING -t mangle -i eth1 -m cluster --cluster-total-nodes 2 --cluster-local-nodemask 1 --cluster-hash-seed 0xdeadbeef -j MARK --set-mark 0xffff nft add rule ip mangle PREROUTING iifname eth1 jhash ct original saddr mod 2 seed 0xdeadbeef eq 0 meta pkttype set host counter meta mark set 0xffff --debug=netlink Result ip mangle PREROUTING [ meta load iifname => reg 1 ] [ cmp eq reg 1 0x31687465 0x00000000 0x00000000 0x00000000 ] [ ct load src => reg 2 , dir original ] [ hash reg 1 = jhash(reg 2, 4, 0xdeadbeef) % mod 2 ] [ cmp eq reg 1 0x00000000 ] [ immediate reg 1 0x00000000 ] [ meta set pkttype with reg 1 ] [ counter pkts 0 bytes 0 ] [ immediate reg 1 0x0000ffff ] [ meta set mark with reg 1 ] For Example: If we have total 2 nodes (i.e, --cluster-total-nodes is 2) in the cluster then modulus 2 = {0, 1} For node 1 (--cluster-local-node 1) jhash ct original saddr mod 2 seed 0xdeadbeef eq 0 For node 2 (--cluster-local-node 2) jhash ct original saddr mod 2 seed 0xdeadbeef eq 1 Signed-off-by: Shyam Saini --- extensions/libxt_cluster.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/extensions/libxt_cluster.c b/extensions/libxt_cluster.c index 3adff12..f2abd18 100644 --- a/extensions/libxt_cluster.c +++ b/extensions/libxt_cluster.c @@ -126,6 +126,16 @@ cluster_save(const void *ip, const struct xt_entry_match *match) info->total_nodes, info->hash_seed); } +static int cluster_xlate(struct xt_xlate *xl, + const struct xt_xlate_mt_params *params) +{ + const struct xt_cluster_match_info *info = (const struct xt_cluster_match_info *)params->match->data; + + xt_xlate_add(xl, "jhash ct original saddr mod %u seed 0x%08x eq 0 meta pkttype set host", + info->total_nodes, info->hash_seed); + return 1; + +} + static struct xtables_match cluster_mt_reg = { .family = NFPROTO_UNSPEC, .name = "cluster", @@ -138,6 +148,7 @@ static struct xtables_match cluster_mt_reg = { .x6_parse = cluster_parse, .x6_fcheck = cluster_check, .x6_options = cluster_opts, + .xlate = cluster_xlate, }; void _init(void) -- 1.9.1