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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef _NF_CONNTRACK_FTP_H |
| 3 | #define _NF_CONNTRACK_FTP_H |
| 4 | |
| 5 | #include <linux/netfilter.h> |
| 6 | #include <linux/skbuff.h> |
| 7 | #include <linux/types.h> |
| 8 | #include <net/netfilter/nf_conntrack_expect.h> |
| 9 | #include <uapi/linux/netfilter/nf_conntrack_ftp.h> |
| 10 | #include <uapi/linux/netfilter/nf_conntrack_tuple_common.h> |
| 11 | |
| 12 | #define FTP_PORT 21 |
| 13 | |
| 14 | #define NF_CT_FTP_SEQ_PICKUP (1 << 0) |
| 15 | |
| 16 | #define NUM_SEQ_TO_REMEMBER 2 |
| 17 | /* This structure exists only once per master */ |
| 18 | struct nf_ct_ftp_master { |
| 19 | /* Valid seq positions for cmd matching after newline */ |
| 20 | u_int32_t seq_aft_nl[IP_CT_DIR_MAX][NUM_SEQ_TO_REMEMBER]; |
| 21 | /* 0 means seq_match_aft_nl not set */ |
| 22 | u_int16_t seq_aft_nl_num[IP_CT_DIR_MAX]; |
| 23 | /* pickup sequence tracking, useful for conntrackd */ |
| 24 | u_int16_t flags[IP_CT_DIR_MAX]; |
| 25 | }; |
| 26 | |
| 27 | /* For NAT to hook in when we find a packet which describes what other |
| 28 | * connection we should expect. */ |
| 29 | extern unsigned int (*nf_nat_ftp_hook)(struct sk_buff *skb, |
| 30 | enum ip_conntrack_info ctinfo, |
| 31 | enum nf_ct_ftp_type type, |
| 32 | unsigned int protoff, |
| 33 | unsigned int matchoff, |
| 34 | unsigned int matchlen, |
| 35 | struct nf_conntrack_expect *exp); |
| 36 | #endif /* _NF_CONNTRACK_FTP_H */ |
| 37 |
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