| /* |
| * ebt_pkttype |
| * |
| * Authors: |
| * Bart De Schuymer <bdschuym@pandora.be> |
| * |
| * April, 2003 |
| * |
| */ |
| #include <linux/module.h> |
| #include <linux/netfilter/x_tables.h> |
| #include <linux/netfilter_bridge/ebtables.h> |
| #include <linux/netfilter_bridge/ebt_pkttype.h> |
| |
| static bool |
| ebt_pkttype_mt(const struct sk_buff *skb, const struct xt_match_param *par) |
| { |
| const struct ebt_pkttype_info *info = par->matchinfo; |
| |
| return (skb->pkt_type == info->pkt_type) ^ info->invert; |
| } |
| |
| static int ebt_pkttype_mt_check(const struct xt_mtchk_param *par) |
| { |
| const struct ebt_pkttype_info *info = par->matchinfo; |
| |
| if (info->invert != 0 && info->invert != 1) |
| return -EINVAL; |
| /* Allow any pkt_type value */ |
| return 0; |
| } |
| |
| static struct xt_match ebt_pkttype_mt_reg __read_mostly = { |
| .name = "pkttype", |
| .revision = 0, |
| .family = NFPROTO_BRIDGE, |
| .match = ebt_pkttype_mt, |
| .checkentry = ebt_pkttype_mt_check, |
| .matchsize = sizeof(struct ebt_pkttype_info), |
| .me = THIS_MODULE, |
| }; |
| |
| static int __init ebt_pkttype_init(void) |
| { |
| return xt_register_match(&ebt_pkttype_mt_reg); |
| } |
| |
| static void __exit ebt_pkttype_fini(void) |
| { |
| xt_unregister_match(&ebt_pkttype_mt_reg); |
| } |
| |
| module_init(ebt_pkttype_init); |
| module_exit(ebt_pkttype_fini); |
| MODULE_DESCRIPTION("Ebtables: Link layer packet type match"); |
| MODULE_LICENSE("GPL"); |