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Linux/include/linux/netfilter/nf_conntrack_ftp.h

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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 <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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