#ifndef _NF_CONNTRACK_FTP_H

#define _NF_CONNTRACK_FTP_H

#include <uapi/linux/netfilter/nf_conntrack_ftp.h>

#define FTP_PORT 21

#define NF_CT_FTP_SEQ_PICKUP (1 << 0)

#define NUM_SEQ_TO_REMEMBER 2

/* This structure exists only once per master */

struct nf_ct_ftp_master {

/* Valid seq positions for cmd matching after newline */

u_int32_t seq_aft_nl[IP_CT_DIR_MAX][NUM_SEQ_TO_REMEMBER];

/* 0 means seq_match_aft_nl not set */

u_int16_t seq_aft_nl_num[IP_CT_DIR_MAX];

/* pickup sequence tracking, useful for conntrackd */

u_int16_t flags[IP_CT_DIR_MAX];

};

struct nf_conntrack_expect;

/* For NAT to hook in when we find a packet which describes what other

* connection we should expect. */

extern unsigned int (*nf_nat_ftp_hook)(struct sk_buff *skb,

enum ip_conntrack_info ctinfo,

enum nf_ct_ftp_type type,

unsigned int protoff,

unsigned int matchoff,

unsigned int matchlen,

struct nf_conntrack_expect *exp);

#endif /* _NF_CONNTRACK_FTP_H */