net/ipv6/ipcomp6.c

Source file repositories/reference/linux-study-clean/net/ipv6/ipcomp6.c

File Facts

System: Linux kernel
Corpus path: net/ipv6/ipcomp6.c
Extension: .c
Size: 5294 bytes
Lines: 225
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.
Allocates kernel memory; connect allocation flags and lifetime to context constraints.
Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

linux/module.h
net/ip.h
net/xfrm.h
net/ipcomp.h
linux/crypto.h
linux/err.h
linux/pfkeyv2.h
linux/random.h
linux/percpu.h
linux/smp.h
linux/list.h
linux/vmalloc.h
linux/rtnetlink.h
net/ip6_route.h
net/icmp.h
net/ipv6.h
net/protocol.h
linux/ipv6.h
linux/icmpv6.h
linux/mutex.h

Detected Declarations

function Protocol
function ipcomp6_tunnel_attach
function ipcomp6_init_state
function ipcomp6_rcv_cb
function ipcomp6_init
function ipcomp6_fini
module init ipcomp6_init

Annotated Snippet

module_init(ipcomp6_init);
module_exit(ipcomp6_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("IP Payload Compression Protocol (IPComp) for IPv6 - RFC3173");
MODULE_AUTHOR("Mitsuru KANDA <mk@linux-ipv6.org>");

MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_COMP);

Annotation

Immediate include surface: `linux/module.h`, `net/ip.h`, `net/xfrm.h`, `net/ipcomp.h`, `linux/crypto.h`, `linux/err.h`, `linux/pfkeyv2.h`, `linux/random.h`.
Detected declarations: `function Protocol`, `function ipcomp6_tunnel_attach`, `function ipcomp6_init_state`, `function ipcomp6_rcv_cb`, `function ipcomp6_init`, `function ipcomp6_fini`, `module init ipcomp6_init`.
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.