include/linux/netfilter/nf_conntrack_ftp.h

   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 */