* fix(grpc): require host match before routing dials to local Unix socket (#9254)
resolveLocalGrpcSocket keyed the Unix-socket hijack on port alone, so a
remote peer reusing a local gRPC port (e.g. a standalone `weed volume`
defaulting port.grpc=17334 against a `weed server` whose in-process
volume socket is also on 17334) had its inbound RPCs silently rerouted
to the local socket. In a cross-DC replication=100 cluster this surfaced
as persistent volume-grow failure: both AllocateVolume RPCs landed on
the local volume server, the second returned "Volume Id N already
exists!", the grow rolled back, and S3 PUTs to the new collection
returned 500.
Track a per-port set of host strings that count as "this machine" and
require the dial host to be in that set before redirecting. Loopback
aliases (localhost, 127.0.0.1, ::1, "") are always included so
same-process dials via loopback still take the socket fast path.
* test(grpc): cover empty-host bare-port dial in local-socket regression test
The empty alias is registered explicitly so SplitHostPort outputs like
":17334" (which can occur when a caller dials a bare port) take the
local-socket fast path. Add a case so that path is exercised.
Chris LuandGitHub
135af25b55