include/uapi/linux/netfilter/xt_l2tp.h

File Facts

System

Linux kernel

Corpus path

include/uapi/linux/netfilter/xt_l2tp.h

Extension

.h

Size

739 bytes

Lines

29

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h

Detected Declarations

• struct xt_l2tp_info
• enum xt_l2tp_type

Annotated Snippet

struct xt_l2tp_info {
	__u32 tid;			/* tunnel id */
	__u32 sid;			/* session id */
	__u8 version;			/* L2TP protocol version */
	__u8 type;			/* L2TP packet type */
	__u8 flags;			/* which fields to match */
};

enum {
	XT_L2TP_TID	= (1 << 0),	/* match L2TP tunnel id */
	XT_L2TP_SID	= (1 << 1),	/* match L2TP session id */
	XT_L2TP_VERSION	= (1 << 2),	/* match L2TP protocol version */
	XT_L2TP_TYPE	= (1 << 3),	/* match L2TP packet type */
};

#endif /* _LINUX_NETFILTER_XT_L2TP_H */

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct xt_l2tp_info`, `enum xt_l2tp_type`.
• Atlas domain: Core OS / Core Kernel Interface.
• 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.