1 #ifndef _NF_CONNTRACK_SEQADJ_H
2 #define _NF_CONNTRACK_SEQADJ_H
4 #include <net/netfilter/nf_conntrack_extend.h>
7 * struct nf_ct_seqadj - sequence number adjustment information
9 * @correction_pos: position of the last TCP sequence number modification
10 * @offset_before: sequence number offset before last modification
11 * @offset_after: sequence number offset after last modification
19 struct nf_conn_seqadj {
20 struct nf_ct_seqadj seq[IP_CT_DIR_MAX];
23 static inline struct nf_conn_seqadj *nfct_seqadj(const struct nf_conn *ct)
25 return nf_ct_ext_find(ct, NF_CT_EXT_SEQADJ);
28 static inline struct nf_conn_seqadj *nfct_seqadj_ext_add(struct nf_conn *ct)
30 return nf_ct_ext_add(ct, NF_CT_EXT_SEQADJ, GFP_ATOMIC);
33 int nf_ct_seqadj_init(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
35 int nf_ct_seqadj_set(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
37 void nf_ct_tcp_seqadj_set(struct sk_buff *skb, struct nf_conn *ct,
38 enum ip_conntrack_info ctinfo, s32 off);
40 int nf_ct_seq_adjust(struct sk_buff *skb, struct nf_conn *ct,
41 enum ip_conntrack_info ctinfo, unsigned int protoff);
42 s32 nf_ct_seq_offset(const struct nf_conn *ct, enum ip_conntrack_dir, u32 seq);
44 int nf_conntrack_seqadj_init(void);
45 void nf_conntrack_seqadj_fini(void);
47 #endif /* _NF_CONNTRACK_SEQADJ_H */