From 84909d171585d77fe769f03e2b1b96eab0aa0213 Mon Sep 17 00:00:00 2001 From: Giuseppe Longo Date: Mon, 9 Sep 2013 12:54:04 +0200 Subject: xtables: bootstrap ARP compatibility layer for nftables This patch bootstraps ARP support for the compatibility layer: 1) copy original arptables code into xtables-arp.c 2) adapt it to fit into the existing nft infrastructure. 3) add the builtin table/chains for ARP. 4) add necessary parts so xtables-multi can provide xtables-arp. 5) add basic support for rule addition (-A), insertion (-I) and listing (-L). [ This was originally posted in a series of patches with interdependencies that I have collapsed to leave the repository in consistent state. This patch includes the following changes I made: * Rename from xtables-arptables to xtables-arp, previous name too long. * Remove nft-arptables.c, now we have one single nft-arp.c file. Moved specific ARP functions to nft.c. Those should go away at some point as some refactorization should allow to accomodate those functions to the existing infrastructure. * Fix --opcode Request/Reply, so we can do something useful with this like dropping ARP request/replies. --pablo ] Signed-off-by: Giuseppe Longo Signed-off-by: Tomasz Bursztyka Signed-off-by: Pablo Neira Ayuso --- iptables/xtables-arp-standalone.c | 86 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 iptables/xtables-arp-standalone.c (limited to 'iptables/xtables-arp-standalone.c') diff --git a/iptables/xtables-arp-standalone.c b/iptables/xtables-arp-standalone.c new file mode 100644 index 00000000..186c9a1e --- /dev/null +++ b/iptables/xtables-arp-standalone.c @@ -0,0 +1,86 @@ +/* + * Author: Paul.Russell@rustcorp.com.au and mneuling@radlogic.com.au + * + * Based on the ipchains code by Paul Russell and Michael Neuling + * + * (C) 2000-2002 by the netfilter coreteam : + * Paul 'Rusty' Russell + * Marc Boucher + * James Morris + * Harald Welte + * Jozsef Kadlecsik + * + * arptables -- IP firewall administration for kernels with + * firewall table (aimed for the 2.3 kernels) + * + * See the accompanying manual page arptables(8) for information + * about proper usage of this program. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include +#include +#include +#include +#include "nft.h" +#include + +#include "xtables-multi.h" + +extern struct xtables_globals xtables_globals; +extern const char *program_version, *program_name; + +static const struct xtables_afinfo afinfo_arp = { + .kmod = "arp_tables", + .proc_exists = "/proc/net/arp_tables_names", + .libprefix = "libarp_", + .family = NFPROTO_ARP, + .ipproto = IPPROTO_IP, + .so_rev_match = -1, + .so_rev_target = -1, +}; + +int xtables_arp_main(int argc, char *argv[]) +{ + int ret; + char *table = "filter"; + struct nft_handle h = { + .family = NFPROTO_ARP, + }; + + xtables_globals.program_name = "xtables-arp"; + /* This code below could be replaced by xtables_init_all, which + * doesn't support NFPROTO_ARP yet. + */ + xtables_init(); + afinfo = &afinfo_arp; + ret = xtables_set_params(&xtables_globals); + if (ret < 0) { + fprintf(stderr, "%s/%s Failed to initialize xtables\n", + xtables_globals.program_name, + xtables_globals.program_version); + exit(1); + } + +#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS) + init_extensions(); +#endif + + ret = do_commandarp(&h, argc, argv, &table); + + exit(!ret); +} -- cgit v1.2.3