net/netfilter/xt_CT.c

File Facts

System

Linux kernel

Corpus path

net/netfilter/xt_CT.c

Extension

.c

Size

10122 bytes

Lines

439

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/gfp.h
• linux/skbuff.h
• linux/netfilter_ipv4/ip_tables.h
• linux/netfilter_ipv6/ip6_tables.h
• linux/netfilter/x_tables.h
• linux/netfilter/xt_CT.h
• net/netfilter/nf_conntrack.h
• net/netfilter/nf_conntrack_l4proto.h
• net/netfilter/nf_conntrack_helper.h
• net/netfilter/nf_conntrack_ecache.h
• net/netfilter/nf_conntrack_timeout.h
• net/netfilter/nf_conntrack_zones.h
• nf_internals.h

Detected Declarations

• function Copyright
• function xt_ct_target_v0
• function xt_ct_target_v1
• function xt_ct_find_proto
• function xt_ct_set_helper
• function xt_ct_set_timeout
• function xt_ct_flags_to_dir
• function xt_ct_put_helper
• function xt_ct_tg_check
• function xt_ct_tg_check_v0
• function xt_ct_tg_check_v1
• function xt_ct_tg_check_v2
• function xt_ct_tg_destroy
• function xt_ct_tg_destroy_v0
• function xt_ct_tg_destroy_v1
• function notrack_tg
• function xt_ct_tg_init
• function xt_ct_tg_exit
• module init xt_ct_tg_init

Annotated Snippet

module_init(xt_ct_tg_init);
module_exit(xt_ct_tg_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Xtables: connection tracking target");
MODULE_ALIAS("ipt_CT");
MODULE_ALIAS("ip6t_CT");
MODULE_ALIAS("ipt_NOTRACK");
MODULE_ALIAS("ip6t_NOTRACK");

Annotation

• Immediate include surface: `linux/module.h`, `linux/gfp.h`, `linux/skbuff.h`, `linux/netfilter_ipv4/ip_tables.h`, `linux/netfilter_ipv6/ip6_tables.h`, `linux/netfilter/x_tables.h`, `linux/netfilter/xt_CT.h`, `net/netfilter/nf_conntrack.h`.
• Detected declarations: `function Copyright`, `function xt_ct_target_v0`, `function xt_ct_target_v1`, `function xt_ct_find_proto`, `function xt_ct_set_helper`, `function xt_ct_set_timeout`, `function xt_ct_flags_to_dir`, `function xt_ct_put_helper`, `function xt_ct_tg_check`, `function xt_ct_tg_check_v0`.
• 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.