net/ipv4/tcp_diag.c

File Facts

System

Linux kernel

Corpus path

net/ipv4/tcp_diag.c

Extension

.c

Size

16376 bytes

Lines

689

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/net.h
• linux/sock_diag.h
• linux/inet_diag.h
• linux/tcp.h
• net/inet_hashtables.h
• net/inet6_hashtables.h
• net/inet_timewait_sock.h
• net/netlink.h
• net/tcp.h

Detected Declarations

• function tcp_diag_get_info
• function tcp_diag_md5sig_fill
• function tcp_diag_put_md5sig
• function tcp_diag_put_ulp
• function tcp_diag_get_aux
• function tcp_diag_get_aux_size
• function tcp_twsk_diag_fill
• function tcp_req_diag_fill
• function sk_diag_fill
• function twsk_build_assert
• function tcp_diag_dump
• function sk_nulls_for_each
• function inet_bind_bucket_for_each
• function sk_for_each_bound
• function sk_nulls_for_each
• function tcp_diag_dump_one
• function tcp_diag_destroy
• function tcp_diag_init
• function tcp_diag_exit
• module init tcp_diag_init

Annotated Snippet

module_init(tcp_diag_init);
module_exit(tcp_diag_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("TCP socket monitoring via SOCK_DIAG");
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-6 /* AF_INET - IPPROTO_TCP */);

Annotation

• Immediate include surface: `linux/module.h`, `linux/net.h`, `linux/sock_diag.h`, `linux/inet_diag.h`, `linux/tcp.h`, `net/inet_hashtables.h`, `net/inet6_hashtables.h`, `net/inet_timewait_sock.h`.
• Detected declarations: `function tcp_diag_get_info`, `function tcp_diag_md5sig_fill`, `function tcp_diag_put_md5sig`, `function tcp_diag_put_ulp`, `function tcp_diag_get_aux`, `function tcp_diag_get_aux_size`, `function tcp_twsk_diag_fill`, `function tcp_req_diag_fill`, `function sk_diag_fill`, `function twsk_build_assert`.
• Atlas domain: Networking Core / Sockets, Protocols, Packet Path, And Network Policy.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.