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