2013-08-27 06:50:12 +00:00
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#ifndef _NF_CONNTRACK_SEQADJ_H
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#define _NF_CONNTRACK_SEQADJ_H
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#include <net/netfilter/nf_conntrack_extend.h>
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/**
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* struct nf_ct_seqadj - sequence number adjustment information
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*
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* @correction_pos: position of the last TCP sequence number modification
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* @offset_before: sequence number offset before last modification
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* @offset_after: sequence number offset after last modification
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*/
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struct nf_ct_seqadj {
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u32 correction_pos;
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s32 offset_before;
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s32 offset_after;
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};
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struct nf_conn_seqadj {
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struct nf_ct_seqadj seq[IP_CT_DIR_MAX];
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};
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static inline struct nf_conn_seqadj *nfct_seqadj(const struct nf_conn *ct)
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{
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return nf_ct_ext_find(ct, NF_CT_EXT_SEQADJ);
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}
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static inline struct nf_conn_seqadj *nfct_seqadj_ext_add(struct nf_conn *ct)
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{
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return nf_ct_ext_add(ct, NF_CT_EXT_SEQADJ, GFP_ATOMIC);
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}
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2013-09-23 18:37:48 +00:00
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int nf_ct_seqadj_init(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
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s32 off);
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int nf_ct_seqadj_set(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
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__be32 seq, s32 off);
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void nf_ct_tcp_seqadj_set(struct sk_buff *skb, struct nf_conn *ct,
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enum ip_conntrack_info ctinfo, s32 off);
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int nf_ct_seq_adjust(struct sk_buff *skb, struct nf_conn *ct,
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enum ip_conntrack_info ctinfo, unsigned int protoff);
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s32 nf_ct_seq_offset(const struct nf_conn *ct, enum ip_conntrack_dir, u32 seq);
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int nf_conntrack_seqadj_init(void);
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void nf_conntrack_seqadj_fini(void);
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2013-08-27 06:50:12 +00:00
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#endif /* _NF_CONNTRACK_SEQADJ_H */
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