net/netfilter/nft_chain_nat.c

File Facts

System

Linux kernel

Corpus path

net/netfilter/nft_chain_nat.c

Extension

.c

Size

3785 bytes

Lines

150

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/netfilter/nf_tables.h
• net/netfilter/nf_nat.h
• net/netfilter/nf_tables.h
• net/netfilter/nf_tables_ipv4.h
• net/netfilter/nf_tables_ipv6.h

Detected Declarations

• function nft_nat_do_chain
• function nft_nat_inet_reg
• function nft_nat_inet_unreg
• function nft_chain_nat_init
• function nft_chain_nat_exit
• module init nft_chain_nat_init

Annotated Snippet

module_init(nft_chain_nat_init);
module_exit(nft_chain_nat_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("nftables network address translation support");
#ifdef CONFIG_NF_TABLES_IPV4
MODULE_ALIAS_NFT_CHAIN(AF_INET, "nat");
#endif
#ifdef CONFIG_NF_TABLES_IPV6
MODULE_ALIAS_NFT_CHAIN(AF_INET6, "nat");
#endif
#ifdef CONFIG_NF_TABLES_INET
MODULE_ALIAS_NFT_CHAIN(1, "nat");	/* NFPROTO_INET */
#endif

Annotation

• Immediate include surface: `linux/module.h`, `linux/netfilter/nf_tables.h`, `net/netfilter/nf_nat.h`, `net/netfilter/nf_tables.h`, `net/netfilter/nf_tables_ipv4.h`, `net/netfilter/nf_tables_ipv6.h`.
• Detected declarations: `function nft_nat_do_chain`, `function nft_nat_inet_reg`, `function nft_nat_inet_unreg`, `function nft_chain_nat_init`, `function nft_chain_nat_exit`, `module init nft_chain_nat_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.