net/netfilter/xt_osf.c

File Facts

System

Linux kernel

Corpus path

net/netfilter/xt_osf.c

Extension

.c

Size

1739 bytes

Lines

77

Domain

Networking Core

Bucket

Sockets, Protocols, Packet Path, And Network Policy

Inferred role

Networking Core: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/kernel.h
• linux/capability.h
• linux/if.h
• linux/inetdevice.h
• linux/ip.h
• linux/list.h
• linux/rculist.h
• linux/skbuff.h
• linux/slab.h
• linux/tcp.h
• net/ip.h
• net/tcp.h
• linux/netfilter/nfnetlink.h
• linux/netfilter/x_tables.h
• net/netfilter/nf_log.h
• linux/netfilter/xt_osf.h

Detected Declarations

• function Copyright
• function xt_osf_init
• function xt_osf_fini
• module init xt_osf_init

Annotated Snippet

module_init(xt_osf_init);
module_exit(xt_osf_fini);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>");
MODULE_DESCRIPTION("Passive OS fingerprint matching.");
MODULE_ALIAS("ipt_osf");
MODULE_ALIAS("ip6t_osf");

Annotation

• Immediate include surface: `linux/module.h`, `linux/kernel.h`, `linux/capability.h`, `linux/if.h`, `linux/inetdevice.h`, `linux/ip.h`, `linux/list.h`, `linux/rculist.h`.
• Detected declarations: `function Copyright`, `function xt_osf_init`, `function xt_osf_fini`, `module init xt_osf_init`.
• Atlas domain: Networking Core / Sockets, Protocols, Packet Path, And Network Policy.
• Implementation status: integration 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.