diff options
Diffstat (limited to 'include/linux/netfilter_arp/arp_tables.h')
-rw-r--r-- | include/linux/netfilter_arp/arp_tables.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/include/linux/netfilter_arp/arp_tables.h b/include/linux/netfilter_arp/arp_tables.h new file mode 100644 index 000000000..c22a7fb8d --- /dev/null +++ b/include/linux/netfilter_arp/arp_tables.h @@ -0,0 +1,79 @@ +/* + * Format of an ARP firewall descriptor + * + * src, tgt, src_mask, tgt_mask, arpop, arpop_mask are always stored in + * network byte order. + * flags are stored in host byte order (of course). + */ +#ifndef _ARPTABLES_H +#define _ARPTABLES_H + +#include <linux/if.h> +#include <linux/in.h> +#include <linux/if_arp.h> +#include <linux/skbuff.h> +#include <uapi/linux/netfilter_arp/arp_tables.h> + +/* Standard entry. */ +struct arpt_standard { + struct arpt_entry entry; + struct xt_standard_target target; +}; + +struct arpt_error { + struct arpt_entry entry; + struct xt_error_target target; +}; + +#define ARPT_ENTRY_INIT(__size) \ +{ \ + .target_offset = sizeof(struct arpt_entry), \ + .next_offset = (__size), \ +} + +#define ARPT_STANDARD_INIT(__verdict) \ +{ \ + .entry = ARPT_ENTRY_INIT(sizeof(struct arpt_standard)), \ + .target = XT_TARGET_INIT(XT_STANDARD_TARGET, \ + sizeof(struct xt_standard_target)), \ + .target.verdict = -(__verdict) - 1, \ +} + +#define ARPT_ERROR_INIT \ +{ \ + .entry = ARPT_ENTRY_INIT(sizeof(struct arpt_error)), \ + .target = XT_TARGET_INIT(XT_ERROR_TARGET, \ + sizeof(struct xt_error_target)), \ + .target.errorname = "ERROR", \ +} + +extern void *arpt_alloc_initial_table(const struct xt_table *); +extern struct xt_table *arpt_register_table(struct net *net, + const struct xt_table *table, + const struct arpt_replace *repl); +extern void arpt_unregister_table(struct xt_table *table); +extern unsigned int arpt_do_table(struct sk_buff *skb, + unsigned int hook, + const struct nf_hook_state *state, + struct xt_table *table); + +#ifdef CONFIG_COMPAT +#include <net/compat.h> + +struct compat_arpt_entry { + struct arpt_arp arp; + __u16 target_offset; + __u16 next_offset; + compat_uint_t comefrom; + struct compat_xt_counters counters; + unsigned char elems[0]; +}; + +static inline struct xt_entry_target * +compat_arpt_get_target(struct compat_arpt_entry *e) +{ + return (void *)e + e->target_offset; +} + +#endif /* CONFIG_COMPAT */ +#endif /* _ARPTABLES_H */ |