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/* ebt_vlan
*
* Authors:
* Bart De Schuymer <bdschuym@pandora.be>
* Nick Fedchik <nick@fedchik.org.ua>
* June, 2002
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <ctype.h>
#include <xtables.h>
#include <netinet/if_ether.h>
#include <linux/netfilter_bridge/ebt_vlan.h>
#include <linux/if_ether.h>
#include "iptables/nft.h"
#include "iptables/nft-bridge.h"
#define NAME_VLAN_ID "id"
#define NAME_VLAN_PRIO "prio"
#define NAME_VLAN_ENCAP "encap"
#define VLAN_ID '1'
#define VLAN_PRIO '2'
#define VLAN_ENCAP '3'
static const struct option brvlan_opts[] = {
{"vlan-id" , required_argument, NULL, VLAN_ID},
{"vlan-prio" , required_argument, NULL, VLAN_PRIO},
{"vlan-encap", required_argument, NULL, VLAN_ENCAP},
XT_GETOPT_TABLEEND,
};
/*
* option inverse flags definition
*/
#define OPT_VLAN_ID 0x01
#define OPT_VLAN_PRIO 0x02
#define OPT_VLAN_ENCAP 0x04
#define OPT_VLAN_FLAGS (OPT_VLAN_ID | OPT_VLAN_PRIO | OPT_VLAN_ENCAP)
static void brvlan_print_help(void)
{
printf(
"vlan options:\n"
"--vlan-id [!] id : vlan-tagged frame identifier, 0,1-4096 (integer)\n"
"--vlan-prio [!] prio : Priority-tagged frame's user priority, 0-7 (integer)\n"
"--vlan-encap [!] encap : Encapsulated frame protocol (hexadecimal or name)\n");
}
static int
brvlan_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct ebt_vlan_info *vlaninfo = (struct ebt_vlan_info *) (*match)->data;
struct xt_ethertypeent *ethent;
char *end;
struct ebt_vlan_info local;
switch (c) {
case VLAN_ID:
EBT_CHECK_OPTION(flags, OPT_VLAN_ID);
if (invert)
vlaninfo->invflags |= EBT_VLAN_ID;
local.id = strtoul(optarg, &end, 10);
if (local.id > 4094 || *end != '\0')
xtables_error(PARAMETER_PROBLEM, "Invalid --vlan-id range ('%s')", optarg);
vlaninfo->id = local.id;
vlaninfo->bitmask |= EBT_VLAN_ID;
break;
case VLAN_PRIO:
EBT_CHECK_OPTION(flags, OPT_VLAN_PRIO);
if (invert)
vlaninfo->invflags |= EBT_VLAN_PRIO;
local.prio = strtoul(optarg, &end, 10);
if (local.prio >= 8 || *end != '\0')
xtables_error(PARAMETER_PROBLEM, "Invalid --vlan-prio range ('%s')", optarg);
vlaninfo->prio = local.prio;
vlaninfo->bitmask |= EBT_VLAN_PRIO;
break;
case VLAN_ENCAP:
EBT_CHECK_OPTION(flags, OPT_VLAN_ENCAP);
if (invert)
vlaninfo->invflags |= EBT_VLAN_ENCAP;
local.encap = strtoul(optarg, &end, 16);
if (*end != '\0') {
ethent = xtables_getethertypebyname(optarg);
if (ethent == NULL)
xtables_error(PARAMETER_PROBLEM, "Unknown --vlan-encap value ('%s')", optarg);
local.encap = ethent->e_ethertype;
}
if (local.encap < ETH_ZLEN)
xtables_error(PARAMETER_PROBLEM, "Invalid --vlan-encap range ('%s')", optarg);
vlaninfo->encap = htons(local.encap);
vlaninfo->bitmask |= EBT_VLAN_ENCAP;
break;
default:
return 0;
}
return 1;
}
static void brvlan_print(const void *ip, const struct xt_entry_match *match,
int numeric)
{
struct ebt_vlan_info *vlaninfo = (struct ebt_vlan_info *) match->data;
if (vlaninfo->bitmask & EBT_VLAN_ID) {
printf("--vlan-id %s%d ", (vlaninfo->invflags & EBT_VLAN_ID) ? "! " : "", vlaninfo->id);
}
if (vlaninfo->bitmask & EBT_VLAN_PRIO) {
printf("--vlan-prio %s%d ", (vlaninfo->invflags & EBT_VLAN_PRIO) ? "! " : "", vlaninfo->prio);
}
if (vlaninfo->bitmask & EBT_VLAN_ENCAP) {
printf("--vlan-encap %s", (vlaninfo->invflags & EBT_VLAN_ENCAP) ? "! " : "");
printf("%4.4X ", ntohs(vlaninfo->encap));
}
}
static int brvlan_xlate(struct xt_xlate *xl,
const struct xt_xlate_mt_params *params)
{
const struct ebt_vlan_info *vlaninfo = (const void*)params->match->data;
if (vlaninfo->bitmask & EBT_VLAN_ID)
xt_xlate_add(xl, "vlan id %s%d ", (vlaninfo->invflags & EBT_VLAN_ID) ? "!= " : "", vlaninfo->id);
if (vlaninfo->bitmask & EBT_VLAN_PRIO)
xt_xlate_add(xl, "vlan pcp %s%d ", (vlaninfo->invflags & EBT_VLAN_PRIO) ? "!= " : "", vlaninfo->prio);
if (vlaninfo->bitmask & EBT_VLAN_ENCAP)
xt_xlate_add(xl, "vlan type %s0x%4.4x ", (vlaninfo->invflags & EBT_VLAN_ENCAP) ? "!= " : "", ntohs(vlaninfo->encap));
return 1;
}
static struct xtables_match brvlan_match = {
.name = "vlan",
.version = XTABLES_VERSION,
.family = NFPROTO_BRIDGE,
.size = XT_ALIGN(sizeof(struct ebt_vlan_info)),
.userspacesize = XT_ALIGN(sizeof(struct ebt_vlan_info)),
.help = brvlan_print_help,
.parse = brvlan_parse,
.print = brvlan_print,
.xlate = brvlan_xlate,
.extra_opts = brvlan_opts,
};
void _init(void)
{
xtables_register_match(&brvlan_match);
}
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