| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * 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 *); |
| int arpt_register_table(struct net *net, const struct xt_table *table, |
| const struct arpt_replace *repl, |
| const struct nf_hook_ops *ops); |
| void arpt_unregister_table(struct net *net, const char *name); |
| void arpt_unregister_table_pre_exit(struct net *net, const char *name); |
| extern unsigned int arpt_do_table(void *priv, struct sk_buff *skb, |
| const struct nf_hook_state *state); |
| |
| #ifdef CONFIG_NETFILTER_XTABLES_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[]; |
| }; |
| |
| 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 */ |