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