net/ipv4/netfilter/nf_nat_pptp.c

File Facts

System

Linux kernel

Corpus path

net/ipv4/netfilter/nf_nat_pptp.c

Extension

.c

Size

9922 bytes

Lines

327

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/tcp.h
• net/netfilter/nf_nat.h
• net/netfilter/nf_nat_helper.h
• net/netfilter/nf_conntrack_helper.h
• net/netfilter/nf_conntrack_expect.h
• net/netfilter/nf_conntrack_zones.h
• linux/netfilter/nf_conntrack_proto_gre.h
• linux/netfilter/nf_conntrack_pptp.h

Detected Declarations

• function pptp_nat_expected
• function pptp_outbound_pkt
• function pptp_exp_gre
• function pptp_inbound_pkt
• function nf_nat_helper_pptp_init
• function nf_nat_helper_pptp_fini
• module init nf_nat_helper_pptp_init

Annotated Snippet

module_init(nf_nat_helper_pptp_init);
module_exit(nf_nat_helper_pptp_fini);

Annotation

• Immediate include surface: `linux/module.h`, `linux/tcp.h`, `net/netfilter/nf_nat.h`, `net/netfilter/nf_nat_helper.h`, `net/netfilter/nf_conntrack_helper.h`, `net/netfilter/nf_conntrack_expect.h`, `net/netfilter/nf_conntrack_zones.h`, `linux/netfilter/nf_conntrack_proto_gre.h`.
• Detected declarations: `function pptp_nat_expected`, `function pptp_outbound_pkt`, `function pptp_exp_gre`, `function pptp_inbound_pkt`, `function nf_nat_helper_pptp_init`, `function nf_nat_helper_pptp_fini`, `module init nf_nat_helper_pptp_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.