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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 423 | giacomo | 1 | #ifndef _IP_CONNTRACK_FTP_H |
| 2 | #define _IP_CONNTRACK_FTP_H |
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| 3 | /* FTP tracking. */ |
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| 4 | |||
| 5 | #ifdef __KERNEL__ |
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| 6 | |||
| 7 | #include <linux/netfilter_ipv4/lockhelp.h> |
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| 8 | |||
| 9 | /* Protects ftp part of conntracks */ |
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| 10 | DECLARE_LOCK_EXTERN(ip_ftp_lock); |
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| 11 | |||
| 12 | #define FTP_PORT 21 |
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| 13 | |||
| 14 | #endif /* __KERNEL__ */ |
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| 15 | |||
| 16 | enum ip_ct_ftp_type |
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| 17 | { |
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| 18 | /* PORT command from client */ |
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| 19 | IP_CT_FTP_PORT, |
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| 20 | /* PASV response from server */ |
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| 21 | IP_CT_FTP_PASV, |
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| 22 | /* EPRT command from client */ |
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| 23 | IP_CT_FTP_EPRT, |
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| 24 | /* EPSV response from server */ |
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| 25 | IP_CT_FTP_EPSV, |
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| 26 | }; |
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| 27 | |||
| 28 | /* This structure is per expected connection */ |
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| 29 | struct ip_ct_ftp_expect |
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| 30 | { |
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| 31 | /* We record seq number and length of ftp ip/port text here: all in |
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| 32 | * host order. */ |
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| 33 | |||
| 34 | /* sequence number of IP address in packet is in ip_conntrack_expect */ |
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| 35 | u_int32_t len; /* length of IP address */ |
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| 36 | enum ip_ct_ftp_type ftptype; /* PORT or PASV ? */ |
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| 37 | u_int16_t port; /* TCP port that was to be used */ |
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| 38 | }; |
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| 39 | |||
| 40 | /* This structure exists only once per master */ |
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| 41 | struct ip_ct_ftp_master { |
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| 42 | /* Next valid seq position for cmd matching after newline */ |
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| 43 | u_int32_t seq_aft_nl[IP_CT_DIR_MAX]; |
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| 44 | /* 0 means seq_match_aft_nl not set */ |
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| 45 | int seq_aft_nl_set[IP_CT_DIR_MAX]; |
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| 46 | }; |
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| 47 | |||
| 48 | #endif /* _IP_CONNTRACK_FTP_H */ |