| /* |
| * 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 int ebt_filter_pkttype(const struct sk_buff *skb, |
| const struct net_device *in, |
| const struct net_device *out, |
| const void *data, |
| unsigned int datalen) |
| { |
| const struct ebt_pkttype_info *info = data; |
| |
| return (skb->pkt_type != info->pkt_type) ^ info->invert; |
| } |
| |
| static bool ebt_pkttype_check(const char *tablename, unsigned int hookmask, |
| const struct ebt_entry *e, void *data, unsigned int datalen) |
| { |
| const struct ebt_pkttype_info *info = data; |
| |
| if (info->invert != 0 && info->invert != 1) |
| return false; |
| /* Allow any pkt_type value */ |
| return true; |
| } |
| |
| static struct ebt_match filter_pkttype __read_mostly = { |
| .name = EBT_PKTTYPE_MATCH, |
| .match = ebt_filter_pkttype, |
| .check = ebt_pkttype_check, |
| .matchsize = XT_ALIGN(sizeof(struct ebt_pkttype_info)), |
| .me = THIS_MODULE, |
| }; |
| |
| static int __init ebt_pkttype_init(void) |
| { |
| return ebt_register_match(&filter_pkttype); |
| } |
| |
| static void __exit ebt_pkttype_fini(void) |
| { |
| ebt_unregister_match(&filter_pkttype); |
| } |
| |
| module_init(ebt_pkttype_init); |
| module_exit(ebt_pkttype_fini); |
| MODULE_DESCRIPTION("Ebtables: Link layer packet type match"); |
| MODULE_LICENSE("GPL"); |