When a router is configured with interface: "auto", the outbound socket
is bound to the same IP that received the incoming connection (read from
DstAddr in context, which is conn.LocalAddr() from the service accept
loop). This enables the 源进源出 (source-in source-out) pattern without
requiring a hardcoded interface name.
Supports comma-separated interface lists (e.g. "auto,eth1") where only
the "auto" token is replaced with the detected ingress IP. Falls back
to the original string when the ingress address is INADDR_ANY, loopback,
or unavailable, so the remaining entries still take effect.
Closesgo-gost/gost#341
Cover the three main abstractions (Router, Chain, Transport), route traversal
lifecycle (Dial → Handshake → Connect), and multiplexing sub-route splitting.
- transport.go: Copy() returned original pointer instead of the allocated copy,
causing data races and incorrect routing for multiplexed chains.
- route.go: Connect and Handshake failures in intermediate nodes leaked the
returned connection. Handshake fix preserves the original Connect result
(guaranteed non-nil) and closes both the Handshake return value and input.
- router.go: defer cancel() inside retry loops accumulated context timers
across iterations. Wrapped each loop body in an IIFE so defer scopes
per-iteration and timers are released immediately.
Upgrade github.com/go-gost/core from v0.3.3 to v0.4.0, adapting to
interface changes:
- Admit(ctx, network, addr, opts) now accepts a network parameter
- Router.Dial now accepts variadic chain.DialOption, forwarded to
the route's Dial call along with router-level options
- gRPC/HTTP admission plugins include the new Network field
Also fix two typos: ResoloverNodeOption -> ResolverNodeOption,
WithHostOpton -> WithHostOption.
ginuerzh