feat(daemon): add shared cross-process connection registry

The daemon forks one child per accepted connection, so per-module and
per-source accounting must live in state shared across the children. Add a
fixed-size registry carved from an anonymous shared mapping
(mmap(MAP_SHARED|MAP_ANONYMOUS)) created before the accept loop: a slot
lifecycle (FREE/CLAIMED/REGISTERED) with parent claim/reclaim and a
lock-free, open-addressed per-source table for the per-host occupancy and
the shared auth-failure counter. C11 atomics only; no pthread locks across
fork.

Unit tests cover slot exhaustion, the module/host caps, pid reclaim and
fork-shared visibility.

This commit is contained in:

TapTap

2026-09-13 10:23:58 +02:00

parent 9242e86772

commit 5334397b81

6 changed files with 662 additions and 0 deletions

									
										tests/test_daemon_limits.h
									
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				#ifndef TEST_DAEMON_LIMITS_H

				#define TEST_DAEMON_LIMITS_H

				void test_daemon_limits();

				#endif