mirror of
https://github.com/openharmony/third_party_iptables.git
synced 2026-07-01 05:52:22 -04:00
HuangHaitao
128 lines
3.6 KiB
C
128 lines
3.6 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 <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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static const struct xt_option_entry brvlan_opts[] =
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{
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{ .name = "vlan-id", .id = EBT_VLAN_ID, .type = XTTYPE_UINT16,
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.max = 4094, .flags = XTOPT_INVERT | XTOPT_PUT,
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XTOPT_POINTER(struct ebt_vlan_info, id) },
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{ .name = "vlan-prio", .id = EBT_VLAN_PRIO, .type = XTTYPE_UINT8,
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.max = 7, .flags = XTOPT_INVERT | XTOPT_PUT,
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XTOPT_POINTER(struct ebt_vlan_info, prio) },
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{ .name = "vlan-encap", .id = EBT_VLAN_ENCAP, .type = XTTYPE_STRING,
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.flags = XTOPT_INVERT },
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XTOPT_TABLEEND,
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};
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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 void brvlan_parse(struct xt_option_call *cb)
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{
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struct ebt_vlan_info *vlaninfo = cb->data;
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struct xt_ethertypeent *ethent;
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char *end;
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xtables_option_parse(cb);
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vlaninfo->bitmask |= cb->entry->id;
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if (cb->invert)
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vlaninfo->invflags |= cb->entry->id;
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if (cb->entry->id == EBT_VLAN_ENCAP) {
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vlaninfo->encap = strtoul(cb->arg, &end, 16);
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if (*end != '\0') {
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ethent = xtables_getethertypebyname(cb->arg);
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if (ethent == NULL)
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xtables_error(PARAMETER_PROBLEM,
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"Unknown --vlan-encap value ('%s')",
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cb->arg);
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vlaninfo->encap = ethent->e_ethertype;
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}
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if (vlaninfo->encap < ETH_ZLEN)
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xtables_error(PARAMETER_PROBLEM,
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"Invalid --vlan-encap range ('%s')",
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cb->arg);
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vlaninfo->encap = htons(vlaninfo->encap);
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}
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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("%s--vlan-id %d ",
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(vlaninfo->invflags & EBT_VLAN_ID) ? "! " : "",
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vlaninfo->id);
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}
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if (vlaninfo->bitmask & EBT_VLAN_PRIO) {
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printf("%s--vlan-prio %d ",
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(vlaninfo->invflags & EBT_VLAN_PRIO) ? "! " : "",
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vlaninfo->prio);
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}
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if (vlaninfo->bitmask & EBT_VLAN_ENCAP) {
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printf("%s--vlan-encap %4.4X ",
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(vlaninfo->invflags & EBT_VLAN_ENCAP) ? "! " : "",
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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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.x6_parse = brvlan_parse,
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.print = brvlan_print,
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.xlate = brvlan_xlate,
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.x6_options = 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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