fc0e3df4f0
This will cause trouble once CONFIG_COMPAT support is added to ebtables. xt_compat_*_offset() calculate the kernel/userland structure size delta using: XT_ALIGN(size) - COMPAT_XT_ALIGN(size) If the match/target sizes are aligned at registration time, delta is always zero. Should have zero effect for existing systems: xtables uses XT_ALIGN() whenever it deals with match/target sizes. Signed-off-by: Florian Westphal <fwestphal@astaro.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/*
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* ebt_pkttype
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*
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* Authors:
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* Bart De Schuymer <bdschuym@pandora.be>
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*
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* April, 2003
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*
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*/
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#include <linux/module.h>
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#include <linux/netfilter/x_tables.h>
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#include <linux/netfilter_bridge/ebtables.h>
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#include <linux/netfilter_bridge/ebt_pkttype.h>
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static bool
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ebt_pkttype_mt(const struct sk_buff *skb, const struct xt_match_param *par)
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{
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const struct ebt_pkttype_info *info = par->matchinfo;
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return (skb->pkt_type == info->pkt_type) ^ info->invert;
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}
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static bool ebt_pkttype_mt_check(const struct xt_mtchk_param *par)
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{
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const struct ebt_pkttype_info *info = par->matchinfo;
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if (info->invert != 0 && info->invert != 1)
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return false;
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/* Allow any pkt_type value */
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return true;
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}
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static struct xt_match ebt_pkttype_mt_reg __read_mostly = {
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.name = "pkttype",
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.revision = 0,
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.family = NFPROTO_BRIDGE,
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.match = ebt_pkttype_mt,
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.checkentry = ebt_pkttype_mt_check,
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.matchsize = sizeof(struct ebt_pkttype_info),
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.me = THIS_MODULE,
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};
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static int __init ebt_pkttype_init(void)
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{
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return xt_register_match(&ebt_pkttype_mt_reg);
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}
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static void __exit ebt_pkttype_fini(void)
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{
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xt_unregister_match(&ebt_pkttype_mt_reg);
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}
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module_init(ebt_pkttype_init);
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module_exit(ebt_pkttype_fini);
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MODULE_DESCRIPTION("Ebtables: Link layer packet type match");
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MODULE_LICENSE("GPL");
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