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/* Code to take an arptables-style command line and do it. */
/*
* arptables:
* Author: Bart De Schuymer <bdschuym@pandora.be>, but
* almost all code is from the iptables userspace program, which has main
* authors: Paul.Russell@rustcorp.com.au and mneuling@radlogic.com.au
*
* 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.
*/
/*
Currently, only support for specifying hardware addresses for Ethernet
is available.
This tool is not luser-proof: you can specify an Ethernet source address
and set hardware length to something different than 6, f.e.
*/
#include "config.h"
#include <getopt.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <xtables.h>
#include "xshared.h"
#include "nft.h"
#include "nft-arp.h"
static struct option original_opts[] = {
{ "append", 1, 0, 'A' },
{ "delete", 1, 0, 'D' },
{ "check", 1, 0, 'C'},
{ "insert", 1, 0, 'I' },
{ "replace", 1, 0, 'R' },
{ "list", 2, 0, 'L' },
{ "list-rules", 2, 0, 'S'},
{ "flush", 2, 0, 'F' },
{ "zero", 2, 0, 'Z' },
{ "new-chain", 1, 0, 'N' },
{ "delete-chain", 2, 0, 'X' },
{ "rename-chain", 1, 0, 'E' },
{ "policy", 1, 0, 'P' },
{ "source-ip", 1, 0, 's' },
{ "destination-ip", 1, 0, 'd' },
{ "src-ip", 1, 0, 's' },
{ "dst-ip", 1, 0, 'd' },
{ "source-mac", 1, 0, 2},
{ "destination-mac", 1, 0, 3},
{ "src-mac", 1, 0, 2},
{ "dst-mac", 1, 0, 3},
{ "h-length", 1, 0, 'l' },
{ "p-length", 1, 0, 8 },
{ "opcode", 1, 0, 4 },
{ "h-type", 1, 0, 5 },
{ "proto-type", 1, 0, 6 },
{ "in-interface", 1, 0, 'i' },
{ "jump", 1, 0, 'j' },
{ "table", 1, 0, 't' },
{ "match", 1, 0, 'm' },
{ "numeric", 0, 0, 'n' },
{ "out-interface", 1, 0, 'o' },
{ "verbose", 0, 0, 'v' },
{ "exact", 0, 0, 'x' },
{ "version", 0, 0, 'V' },
{ "help", 2, 0, 'h' },
{ "line-numbers", 0, 0, '0' },
{ "modprobe", 1, 0, 'M' },
{ "set-counters", 1, 0, 'c' },
{ 0 }
};
#define opts xt_params->opts
extern void xtables_exit_error(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3)));
static void printhelp(const struct xtables_rule_match *m);
struct xtables_globals arptables_globals = {
.option_offset = 0,
.program_version = PACKAGE_VERSION,
.optstring = OPTSTRING_COMMON "C:R:S::" "h::l:nv" /* "m:" */,
.orig_opts = original_opts,
.exit_err = xtables_exit_error,
.compat_rev = nft_compatible_revision,
.print_help = printhelp,
};
static void
printhelp(const struct xtables_rule_match *m)
{
struct xtables_target *t = NULL;
int i;
printf("%s v%s\n\n"
"Usage: %s -[ACD] chain rule-specification [options]\n"
" %s -I chain [rulenum] rule-specification [options]\n"
" %s -R chain rulenum rule-specification [options]\n"
" %s -D chain rulenum [options]\n"
" %s -[LS] [chain [rulenum]] [options]\n"
" %s -[FZ] [chain] [options]\n"
" %s -[NX] chain\n"
" %s -E old-chain-name new-chain-name\n"
" %s -P chain target [options]\n"
" %s -h (print this help information)\n\n",
arptables_globals.program_name,
arptables_globals.program_version,
arptables_globals.program_name,
arptables_globals.program_name,
arptables_globals.program_name,
arptables_globals.program_name,
arptables_globals.program_name,
arptables_globals.program_name,
arptables_globals.program_name,
arptables_globals.program_name,
arptables_globals.program_name,
arptables_globals.program_name);
printf(
"Commands:\n"
"Either long or short options are allowed.\n"
" --append -A chain Append to chain\n"
" --check -C chain Check for the existence of a rule\n"
" --delete -D chain Delete matching rule from chain\n"
" --delete -D chain rulenum\n"
" Delete rule rulenum (1 = first) from chain\n"
" --insert -I chain [rulenum]\n"
" Insert in chain as rulenum (default 1=first)\n"
" --replace -R chain rulenum\n"
" Replace rule rulenum (1 = first) in chain\n"
" --list -L [chain [rulenum]]\n"
" List the rules in a chain or all chains\n"
" --list-rules -S [chain [rulenum]]\n"
" Print the rules in a chain or all chains\n"
" --flush -F [chain] Delete all rules in chain or all chains\n"
" --zero -Z [chain [rulenum]]\n"
" Zero counters in chain or all chains\n"
" --new -N chain Create a new user-defined chain\n"
" --delete-chain\n"
" -X [chain] Delete a user-defined chain\n"
" --policy -P chain target\n"
" Change policy on chain to target\n"
" --rename-chain\n"
" -E old-chain new-chain\n"
" Change chain name, (moving any references)\n"
"Options:\n"
" --source-ip -s [!] address[/mask]\n"
" source specification\n"
" --destination-ip -d [!] address[/mask]\n"
" destination specification\n"
" --source-mac [!] address[/mask]\n"
" --destination-mac [!] address[/mask]\n"
" --h-length -l length[/mask] hardware length (nr of bytes)\n"
" --opcode code[/mask] operation code (2 bytes)\n"
" --h-type type[/mask] hardware type (2 bytes, hexadecimal)\n"
" --proto-type type[/mask] protocol type (2 bytes)\n"
" --in-interface -i [!] input name[+]\n"
" network interface name ([+] for wildcard)\n"
" --out-interface -o [!] output name[+]\n"
" network interface name ([+] for wildcard)\n"
" --jump -j target\n"
" target for rule (may load target extension)\n"
" --match -m match\n"
" extended match (may load extension)\n"
" --numeric -n numeric output of addresses and ports\n"
" --table -t table table to manipulate (default: `filter')\n"
" --verbose -v verbose mode\n"
" --line-numbers print line numbers when listing\n"
" --exact -x expand numbers (display exact values)\n"
" --modprobe=<command> try to insert modules using this command\n"
" --set-counters -c PKTS BYTES set the counter during insert/append\n"
"[!] --version -V print package version.\n");
printf(" opcode strings: \n");
for (i = 0; i < NUMOPCODES; i++)
printf(" %d = %s\n", i + 1, arp_opcodes[i]);
printf(
" hardware type string: 1 = Ethernet\n"
" protocol type string: 0x800 = IPv4\n");
/* Print out any special helps. A user might like to be able
to add a --help to the commandline, and see expected
results. So we call help for all matches & targets */
for (t = xtables_targets; t; t = t->next) {
if (strcmp(t->name, "CLASSIFY") && strcmp(t->name, "mangle"))
continue;
printf("\n");
t->help();
}
}
int nft_init_arp(struct nft_handle *h, const char *pname)
{
arptables_globals.program_name = pname;
if (xtables_init_all(&arptables_globals, NFPROTO_ARP) < 0) {
fprintf(stderr, "%s/%s Failed to initialize arptables-compat\n",
arptables_globals.program_name,
arptables_globals.program_version);
exit(1);
}
#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS)
init_extensionsa();
#endif
if (nft_init(h, NFPROTO_ARP) < 0)
xtables_error(OTHER_PROBLEM,
"Could not initialize nftables layer.");
return 0;
}
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