net/netfilter/xt_nat.c

File Facts

System

Linux kernel

Corpus path

net/netfilter/xt_nat.c

Extension

.c

Size

6615 bytes

Lines

248

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/skbuff.h
• linux/netfilter.h
• linux/netfilter/x_tables.h
• net/netfilter/nf_nat.h

Detected Declarations

• function xt_nat_checkentry_v0
• function xt_nat_checkentry
• function xt_nat_destroy
• function xt_nat_convert_range
• function xt_snat_target_v0
• function xt_dnat_target_v0
• function xt_snat_target_v1
• function xt_dnat_target_v1
• function xt_snat_target_v2
• function xt_dnat_target_v2
• function xt_nat_init
• function xt_nat_exit
• module init xt_nat_init

Annotated Snippet

module_init(xt_nat_init);
module_exit(xt_nat_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_ALIAS("ipt_SNAT");
MODULE_ALIAS("ipt_DNAT");
MODULE_ALIAS("ip6t_SNAT");
MODULE_ALIAS("ip6t_DNAT");
MODULE_DESCRIPTION("SNAT and DNAT targets support");

Annotation

• Immediate include surface: `linux/module.h`, `linux/skbuff.h`, `linux/netfilter.h`, `linux/netfilter/x_tables.h`, `net/netfilter/nf_nat.h`.
• Detected declarations: `function xt_nat_checkentry_v0`, `function xt_nat_checkentry`, `function xt_nat_destroy`, `function xt_nat_convert_range`, `function xt_snat_target_v0`, `function xt_dnat_target_v0`, `function xt_snat_target_v1`, `function xt_dnat_target_v1`, `function xt_snat_target_v2`, `function xt_dnat_target_v2`.
• 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.