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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef _NF_CONNTRACK_SEQADJ_H |
| 3 | #define _NF_CONNTRACK_SEQADJ_H |
| 4 | |
| 5 | #include <net/netfilter/nf_conntrack_extend.h> |
| 6 | |
| 7 | /** |
| 8 | * struct nf_ct_seqadj - sequence number adjustment information |
| 9 | * |
| 10 | * @correction_pos: position of the last TCP sequence number modification |
| 11 | * @offset_before: sequence number offset before last modification |
| 12 | * @offset_after: sequence number offset after last modification |
| 13 | */ |
| 14 | struct nf_ct_seqadj { |
| 15 | u32 correction_pos; |
| 16 | s32 offset_before; |
| 17 | s32 offset_after; |
| 18 | }; |
| 19 | |
| 20 | struct nf_conn_seqadj { |
| 21 | struct nf_ct_seqadj seq[IP_CT_DIR_MAX]; |
| 22 | }; |
| 23 | |
| 24 | static inline struct nf_conn_seqadj *nfct_seqadj(const struct nf_conn *ct) |
| 25 | { |
| 26 | return nf_ct_ext_find(ct, NF_CT_EXT_SEQADJ); |
| 27 | } |
| 28 | |
| 29 | static inline struct nf_conn_seqadj *nfct_seqadj_ext_add(struct nf_conn *ct) |
| 30 | { |
| 31 | return nf_ct_ext_add(ct, NF_CT_EXT_SEQADJ, GFP_ATOMIC); |
| 32 | } |
| 33 | |
| 34 | int nf_ct_seqadj_init(struct nf_conn *ct, enum ip_conntrack_info ctinfo, |
| 35 | s32 off); |
| 36 | int nf_ct_seqadj_set(struct nf_conn *ct, enum ip_conntrack_info ctinfo, |
| 37 | __be32 seq, s32 off); |
| 38 | void nf_ct_tcp_seqadj_set(struct sk_buff *skb, struct nf_conn *ct, |
| 39 | enum ip_conntrack_info ctinfo, s32 off); |
| 40 | |
| 41 | int nf_ct_seq_adjust(struct sk_buff *skb, struct nf_conn *ct, |
| 42 | enum ip_conntrack_info ctinfo, unsigned int protoff); |
| 43 | s32 nf_ct_seq_offset(const struct nf_conn *ct, enum ip_conntrack_dir, u32 seq); |
| 44 | |
| 45 | #endif /* _NF_CONNTRACK_SEQADJ_H */ |
| 46 |
Warning: This file is not a C or C++ file. It does not have highlighting.