blob: c3e2060c730546468fb012441393942001a47abd [file] [log] [blame]
#ifndef _NF_NAT_H
#define _NF_NAT_H
#include <linux/netfilter_ipv4.h>
#include <net/netfilter/nf_conntrack_tuple.h>
#define NF_NAT_MAPPING_TYPE_MAX_NAMELEN 16
enum nf_nat_manip_type
{
IP_NAT_MANIP_SRC,
IP_NAT_MANIP_DST
};
/* SRC manip occurs POST_ROUTING or LOCAL_IN */
#define HOOK2MANIP(hooknum) ((hooknum) != NF_INET_POST_ROUTING && \
(hooknum) != NF_INET_LOCAL_IN)
#define IP_NAT_RANGE_MAP_IPS 1
#define IP_NAT_RANGE_PROTO_SPECIFIED 2
#define IP_NAT_RANGE_PROTO_RANDOM 4
#define IP_NAT_RANGE_PERSISTENT 8
/* NAT sequence number modifications */
struct nf_nat_seq {
/* position of the last TCP sequence number modification (if any) */
u_int32_t correction_pos;
/* sequence number offset before and after last modification */
int16_t offset_before, offset_after;
};
/* Single range specification. */
struct nf_nat_range
{
/* Set to OR of flags above. */
unsigned int flags;
/* Inclusive: network order. */
__be32 min_ip, max_ip;
/* Inclusive: network order */
union nf_conntrack_man_proto min, max;
};
/* For backwards compat: don't use in modern code. */
struct nf_nat_multi_range_compat
{
unsigned int rangesize; /* Must be 1. */
/* hangs off end. */
struct nf_nat_range range[1];
};
#define nf_nat_multi_range nf_nat_multi_range_compat
#endif