* feat(peer): echo liveness probes on data traffic
Advertise a liveness-echo capability during classic and Noise
handshakes. After a ping failure, tag outgoing peer packets with a
short probe token and accept only the matching echoed token as
round-trip proof.
Keep one ping request outstanding and coalesce scheduler triggers so
high traffic cannot reorder timeout results. Preserve one-way failure
detection because unrelated ingress never clears the loss counter.
* test(three_node): relax disconnect wait for sequential pingpong
proxy_three_node_disconnect_test assumed the old pingpong timing,
where overlapping pings failed fast and the connection closed well
inside the 11s wait (see the old [4, 9)s comment).
The liveness-echo change keeps one ping outstanding: each failure
now takes a full 2s timeout, so the fifth consecutive failure and
the connection close land at ~11s. Both proto variants timed out at
the 11s bound in CI. Widen the wait to 15s and update the timing
comment.
* perf(stats): avoid per-update clock reads
Perf profiles show quanta::get_now consuming 2.9-4.3% of data-plane
CPU because every counter update refreshes a high-resolution timestamp.
Track metric activity with the existing 60-second cleanup cadence instead.
Relaxed 32-bit epochs preserve the three-minute retention window, support
32-bit targets, and remove repeated clock reads from packet processing.
* perf(data-plane): reduce per-packet synchronization
Perf profiles showed per-packet config Arc cloning, bounded-channel
permit futures, duplicate peer lookups, and default connection UUID
lookups consuming CPU in both TCP and UDP data paths.
Borrow stable config snapshots, use nonblocking channel fast paths with
the existing backpressure fallback, reuse direct peer lookups, and cache
the selected connection while preserving close and reselection behavior.
Add focused tests for channel backpressure and cached connection
invalidation.
* fix(peer): serialize default connection cache updates
The profile-guided default connection cache could republish a connection
after the close task removed it, leaving a stale cache while another
connection remained live.
Serialize only cache-miss selection/publication and connection removal.
The per-packet cache-hit path remains lock-free, while close and selection
can no longer race to resurrect a removed connection.
Create easytier-core as the portable owner of configuration,
connectivity, tunnels, peer and routing state, gateways, management,
the data plane, and instance lifecycle. Keep operating-system
integration, native protocol engines, process startup, and presentation
in easytier behind explicit Host capability adapters.
Create easytier-proto to own schemas, generated RPC types, descriptors,
and feature-scoped protocol slices. Remove runtime protobuf reflection
from core while preserving unknown route-peer fields across forwarding.
Normalize instance construction through CoreInstance, CoreHostAdapters,
CoreProcessRuntime, and InstanceManager. Make the runtime config store
the only authoritative mutable configuration after startup.
Move the portable TCP/UDP data plane into core and extract a generic
OperationBroker for completion, cancellation, disposal, and capacity
accounting. Expose the session-based FFI v2 completion API and keep the
WASI guest ABI, wire schemas, and adapters with core.
Migrate CLI, GUI, web, FFI, Android JNI, OHOS, uptime, and mobile
consumers to the shared manager and core state. Add explicit user/web
config ownership and revision-aware web reconciliation.
Preserve configuration, wire, and management behavior while fixing
regressions discovered by the full platform and integration matrix:
- inherit advertised relay capabilities in foreign networks;
- refresh OSPF peer state immediately after runtime config changes;
- restore CLI GlobalCtx event output without forcing GUI logging;
- retain legacy encryption names and standalone RPC tunnel metadata;
- restore ICMP host composition and fragmented UDP handling;
- use portable 64-bit atomics on 32-bit MIPS targets; and
- retain discarded operations until late cancellation completes.
Validate the refactor across 45 GitHub checks, including Linux, macOS,
Windows, FreeBSD, web, GUI, Android, OHOS, feature profiles, and
three-node and subnet-proxy integration tests.
BREAKING CHANGE: internal Rust module paths are not preserved. Legacy
native data-plane APIs are replaced by the session-based FFI v2 API.
The dedicated Android data-plane wrapper is removed.
KKRainbow