blob: 7bfc5893ec314e247693374131a31f0144da20d3 [file] [log] [blame]
/*
* 25-Jul-1998 Major changes to allow for ip chain table
*
* 3-Jan-2000 Named tables to allow packet selection for different uses.
*/
/*
* Format of an IP firewall descriptor
*
* src, dst, src_mask, dst_mask are always stored in network byte order.
* flags are stored in host byte order (of course).
* Port numbers are stored in HOST byte order.
*/
#ifndef _IPTABLES_H
#define _IPTABLES_H
#include <linux/if.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <uapi/linux/netfilter_ipv4/ip_tables.h>
extern void ipt_init(void) __init;
int ipt_register_table(struct net *net, const struct xt_table *table,
const struct ipt_replace *repl,
const struct nf_hook_ops *ops, struct xt_table **res);
void ipt_unregister_table(struct net *net, struct xt_table *table,
const struct nf_hook_ops *ops);
/* Standard entry. */
struct ipt_standard {
struct ipt_entry entry;
struct xt_standard_target target;
};
struct ipt_error {
struct ipt_entry entry;
struct xt_error_target target;
};
#define IPT_ENTRY_INIT(__size) \
{ \
.target_offset = sizeof(struct ipt_entry), \
.next_offset = (__size), \
}
#define IPT_STANDARD_INIT(__verdict) \
{ \
.entry = IPT_ENTRY_INIT(sizeof(struct ipt_standard)), \
.target = XT_TARGET_INIT(XT_STANDARD_TARGET, \
sizeof(struct xt_standard_target)), \
.target.verdict = -(__verdict) - 1, \
}
#define IPT_ERROR_INIT \
{ \
.entry = IPT_ENTRY_INIT(sizeof(struct ipt_error)), \
.target = XT_TARGET_INIT(XT_ERROR_TARGET, \
sizeof(struct xt_error_target)), \
.target.errorname = "ERROR", \
}
extern void *ipt_alloc_initial_table(const struct xt_table *);
extern unsigned int ipt_do_table(struct sk_buff *skb,
const struct nf_hook_state *state,
struct xt_table *table);
#ifdef CONFIG_COMPAT
#include <net/compat.h>
struct compat_ipt_entry {
struct ipt_ip ip;
compat_uint_t nfcache;
__u16 target_offset;
__u16 next_offset;
compat_uint_t comefrom;
struct compat_xt_counters counters;
unsigned char elems[0];
};
/* Helper functions */
static inline struct xt_entry_target *
compat_ipt_get_target(struct compat_ipt_entry *e)
{
return (void *)e + e->target_offset;
}
#endif /* CONFIG_COMPAT */
#endif /* _IPTABLES_H */