| /* |
| * 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 */ |