include/net/netfilter/nf_conntrack_seqadj.h

File Facts

System

Linux kernel

Corpus path

include/net/netfilter/nf_conntrack_seqadj.h

Extension

.h

Size

1400 bytes

Lines

46

Domain

Networking Core

Bucket

Sockets, Protocols, Packet Path, And Network Policy

Inferred role

Networking Core: implementation source

Status

source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

• Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• net/netfilter/nf_conntrack_extend.h

Detected Declarations

• struct nf_ct_seqadj
• struct nf_conn_seqadj

Annotated Snippet

struct nf_ct_seqadj {
	u32		correction_pos;
	s32		offset_before;
	s32		offset_after;
};

struct nf_conn_seqadj {
	struct nf_ct_seqadj	seq[IP_CT_DIR_MAX];
};

static inline struct nf_conn_seqadj *nfct_seqadj(const struct nf_conn *ct)
{
	return nf_ct_ext_find(ct, NF_CT_EXT_SEQADJ);
}

static inline struct nf_conn_seqadj *nfct_seqadj_ext_add(struct nf_conn *ct)
{
	return nf_ct_ext_add(ct, NF_CT_EXT_SEQADJ, GFP_ATOMIC);
}

int nf_ct_seqadj_init(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
		      s32 off);
int nf_ct_seqadj_set(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
		     __be32 seq, s32 off);
void nf_ct_tcp_seqadj_set(struct sk_buff *skb, struct nf_conn *ct,
			  enum ip_conntrack_info ctinfo, s32 off);

int nf_ct_seq_adjust(struct sk_buff *skb, struct nf_conn *ct,
		     enum ip_conntrack_info ctinfo, unsigned int protoff);
s32 nf_ct_seq_offset(const struct nf_conn *ct, enum ip_conntrack_dir, u32 seq);

#endif /* _NF_CONNTRACK_SEQADJ_H */

Annotation

• Immediate include surface: `net/netfilter/nf_conntrack_extend.h`.
• Detected declarations: `struct nf_ct_seqadj`, `struct nf_conn_seqadj`.
• Atlas domain: Networking Core / Sockets, Protocols, Packet Path, And Network Policy.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.