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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 ip_ct_ftp_type | |
7 | { | |
8 | /* PORT command from client */ | |
9 | IP_CT_FTP_PORT, | |
10 | /* PASV response from server */ | |
11 | IP_CT_FTP_PASV, | |
12 | /* EPRT command from client */ | |
13 | IP_CT_FTP_EPRT, | |
14 | /* EPSV response from server */ | |
15 | IP_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 ip_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 ip_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 (*ip_nat_ftp_hook)(struct sk_buff **pskb, | |
36 | enum ip_conntrack_info ctinfo, | |
37 | enum ip_ct_ftp_type type, | |
38 | unsigned int matchoff, | |
39 | unsigned int matchlen, | |
40 | struct ip_conntrack_expect *exp, | |
41 | u32 *seq); | |
42 | #endif /* __KERNEL__ */ | |
43 | ||
44 | #endif /* _NF_CONNTRACK_FTP_H */ |