diff options
Diffstat (limited to 'kernel/include/linux/netfilter_ipv4/ip_tables.h')
-rw-r--r-- | kernel/include/linux/netfilter_ipv4/ip_tables.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/kernel/include/linux/netfilter_ipv4/ip_tables.h b/kernel/include/linux/netfilter_ipv4/ip_tables.h new file mode 100644 index 000000000..4073510da --- /dev/null +++ b/kernel/include/linux/netfilter_ipv4/ip_tables.h @@ -0,0 +1,92 @@ +/* + * 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; + +extern struct xt_table *ipt_register_table(struct net *net, + const struct xt_table *table, + const struct ipt_replace *repl); +extern void ipt_unregister_table(struct net *net, struct xt_table *table); + +/* 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, + unsigned int hook, + 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 */ |