include/linux/netfilter/nf_conntrack_ftp.h

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