BBQ
301dbc56d0
The quic and wt (WebTransport) listeners wrap the raw UDP socket with net.PacketConn metrics/stats/admission/limiter wrappers before handing it to quic-go. WrapPacketConn returns a plain net.PacketConn, which hides the underlying *net.UDPConn. quic-go probes the conn for OOBCapablePacketConn (SyscallConn, SetReadBuffer, ReadMsgUDP, WriteMsgUDP); behind the wrapper that probe fails, so quic-go disables its kernel offloads and cannot size its receive buffer. Switch the non-cipher path of both listeners to WrapUDPConn variants, which forward SyscallConn/SetReadBuffer/ReadMsgUDP/WriteMsgUDP down to the underlying *net.UDPConn, so quic-go sees an OOBCapablePacketConn and keeps GSO/GRO + buffer sizing. The same metrics/stats/admission/ limiting still apply. The quic listener's cipher path keeps the net.PacketConn wrappers, since CipherPacketConn is not OOB-capable. +48% throughput (1.80 → 2.69 Gbit/s single-stream, loopback iperf3). The quic-go receive-buffer warning is gone.
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The implementation layer for the GOST proxy framework. Every interface defined in core/ is implemented here — handlers, listeners, dialers, connectors, plus config parsing, registries, and all cross-cutting concerns.
Package layout
| Directory | Purpose |
|---|---|
handler/ |
Protocol handlers (http, socks4/5, ss, ssh, tunnel, tun, dns, redirect, etc.) |
listener/ |
Protocol listeners (tcp, tls, ws, http2/3, quic, kcp, icmp, tun, udp, etc.) |
dialer/ |
Outbound dialers (tcp, tls, ws, http2/3, quic, grpc, ssh, wg, kcp, icmp, etc.) |
connector/ |
Destination connectors (http, socks4/5, ss, ssh, relay, tunnel, direct, etc.) |
config/ |
Config struct, YAML/JSON parsing, and service construction |
registry/ |
Typed global registries for all component types |
service/ |
Accept loop wiring listener + handler |
chain/ |
Multi-hop forwarding chain and route implementation |
router/ |
Route table router (destination-based routing) |
hop/ |
Node group with load-balanced selection |
selector/ |
Load-balancing strategies (round-robin, random, weighted, hash) |
auth/, bypass/, admission/ |
Authentication, bypass rules, admission control |
resolver/, hosts/ |
DNS resolution and host mapping |
limiter/ |
Traffic, connection, and rate limiters |
recorder/, observer/ |
Traffic recording and observability |
ingress/, sd/, routing/ |
Ingress control, service discovery, routing rules |
logger/, metrics/, api/ |
Logging, Prometheus metrics, Web API |
metadata/, ctx/ |
Metadata key-value system and context propagation |
internal/ |
Shared internals — not importable externally |
Component pattern
Every handler, listener, dialer, and connector follows the same pattern: init() registers a constructor into a global registry, the constructor takes functional options, and Init(metadata.Metadata) extracts typed configuration from the metadata key-value map.
See CLAUDE.md for detailed architecture and conventions.