1 #ifndef _NF_CONNTRACK_FTP_H
2 #define _NF_CONNTRACK_FTP_H
3 /* FTP tracking. */
4
5 /* This enum is exposed to userspace */
6 enum nf_ct_ftp_type
7 {
8 /* PORT command from client */
9 NF_CT_FTP_PORT,
10 /* PASV response from server */
11 NF_CT_FTP_PASV,
12 /* EPRT command from client */
13 NF_CT_FTP_EPRT,
14 /* EPSV response from server */
15 NF_CT_FTP_EPSV,
16 };
17
18 #ifdef __KERNEL__
19
20 #define FTP_PORT 21
21
22 #define NUM_SEQ_TO_REMEMBER 2
23 /* This structure exists only once per master */
24 struct nf_ct_ftp_master {
25 /* Valid seq positions for cmd matching after newline */
26 u_int32_t seq_aft_nl[IP_CT_DIR_MAX][NUM_SEQ_TO_REMEMBER];
27 /* 0 means seq_match_aft_nl not set */
28 int seq_aft_nl_num[IP_CT_DIR_MAX];
29 };
30
31 struct nf_conntrack_expect;
32
33 /* For NAT to hook in when we find a packet which describes what other
34 * connection we should expect. */
35 extern unsigned int (*nf_nat_ftp_hook)(struct sk_buff *skb,
36 enum ip_conntrack_info ctinfo,
37 enum nf_ct_ftp_type type,
38 unsigned int matchoff,
39 unsigned int matchlen,
40 struct nf_conntrack_expect *exp);
41 #endif /* __KERNEL__ */
42
43 #endif /* _NF_CONNTRACK_FTP_H */
44
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