Add Network() matcher to the routing DSL so nodes can be selected based on
connection network type (tcp/udp). Uses prefix matching so Network("tcp")
matches tcp, tcp4, tcp6 and Network("udp") matches udp, udp4, udp6.
- core/routing: add Network field to Request struct (core v0.4.3)
- x/routing/matcher: add network() matcher registered as "Network"
- x/hop: pass options.Network to routing.Request in Select()
Fixesgo-gost/gost#703
When the user specifies an IP address as the interface (e.g.
interface=10.1.1.1), GOST resolved it to its hosting interface and
called SO_BINDTODEVICE on it — breaking outbound connectivity for
IP aliases on loopback or dummy interfaces (go-gost/gost#785).
The initial fix (caa82f2) only skipped SO_BINDTODEVICE for loopback
interfaces, missing non-loopback dummy interfaces like ip-aliases.
This change adds an isIP return value to ParseInterfaceAddr so callers
can distinguish 'user specified an IP' (intent: source IP binding for
policy routing — skip SO_BINDTODEVICE) from 'user specified an
interface name' (intent: force traffic through that NIC — keep
SO_BINDTODEVICE). The dialOnce method now only calls bindDevice when
bindToDevice is true AND the input was an interface name (!isIP).
The loopback-specific guard in bindDevice is reverted — superseded by
the broader isIP-based fix that covers all interface types.
When sniffing is enabled, the sniffer extracts the real domain from HTTP
Host header or TLS SNI and checks bypass rules against it. However, most
handlers were not passing WithBypass(...) to the sniffer, so the sniffer
internal bypass check was always skipped.
Additionally, the TLS-to-HTTP fallback paths in internal util sniffer
and forwarder also omitted bypass when constructing options for the
recursive HandleHTTP call after decrypting TLS.
Add WithBypass to all sniffer call sites that were missing it across
handlers (http, relay, socks4, socks5, ss, sshd, unix) and internal
TLS fallback paths.
Also fix import ordering in handler/http/connect.go.
Fixesgo-gost/gost#874
Previously BuildDefaultTLSConfig generated a new random self-signed
certificate in memory on every run, making it impossible for users to
extract and trust the certificate in their system trust store.
Now when no explicit cert files are configured, GOST:
1. First checks cert.pem / key.pem in CWD (backward compatible)
2. Then checks auto-ca-cert.pem / auto-ca-key.pem under $HOME/.gost/
3. If none found, generates a new ECDSA P-256 CA certificate, persists
it to $HOME/.gost/, and uses it
The persisted cert has IsCA=true so tools recognize it as a root CA.
Falls back to in-memory-only when disk writes fail.
Closesgo-gost/gost#876
Probe resistance (probeResist=code:403) was always returning 400 Bad
Request instead of the configured status code because the
non-proxy-form request validation check (req.URL.Scheme != "http")
ran before Authenticate(). Browser/scanner probes send GET / HTTP/1.1
which has an empty URL scheme, so they were rejected at the validation
gate before probe resistance ever had a chance to respond.
Swap the order: run Authenticate() first so probe resistance can
intercept non-proxy-form probes with the configured decoy response.
Legitimate clients with correct credentials proceed to request
validation and routing as before.
Add opt-in reuseport metadata option for tcp, mtcp, and redirect/tcp
listeners, allowing a GOST listener on a specific IP to coexist with
another process on the same port but different address (e.g., Nginx on
0.0.0.0:443 + GOST on 127.0.0.1:443). With SO_REUSEPORT, the kernel
routes to the most specific address match.
On Unix, sets SO_REUSEPORT via ListenConfig.Control before bind().
On Windows, the option is a no-op (SO_REUSEADDR is the default).
Closesgo-gost/gost#654
Only the first entry of config.Net was installed on the wintun adapter,
so dual-stack setups (e.g. net=192.168.123.1/24,fd::2/64) silently
dropped the IPv6 address and IPv6 traffic never worked. Iterate every
configured address and select the netsh context by family (ip for IPv4,
ipv6 for IPv6). A failing address is logged and skipped so one bad
entry no longer aborts the rest or triggers the listenLoop's infinite
recreate-retry. If no address can be configured, return an error
instead of a nil peer IP.
Refs: go-gost/gost#624
Add 8-case table-driven test covering nil addr, IPv4/IPv6/domain/unknown
addr types for both tcp and udp networks.
Ref: 03f4b12 (fix(handler): use addr-family-specific network for SOCKS5 BIND)
When the SOCKS5 BIND request carries an IPv4 address (e.g. 0.0.0.0:0),
pass the network as "tcp4"/"udp4" instead of "tcp"/"udp". On Linux,
net.Listen("tcp", "0.0.0.0:0") creates a dual-stack IPv6 socket
binding on [::]:port, so the bound address returned to the client
mismatches the actual listening socket. Same fix for CmdMuxBind and
CmdUDPTun. CmdConnect is left unchanged since dual-stack dialing is
correct for outbound connections.
Log a warning in ParseService when certFile/keyFile/caFile are configured for a listener type that never terminates TLS (tcp, udp, ws, mws, redirect, tproxy, rtcp, rudp, unix, runix, serial, stdio), so the misconfiguration is no longer silent. Uses a conservative plaintext blocklist; TLS-keyed off raw config strings so normal plaintext services stay quiet.
Refs go-gost/gost#579.
The stdio listener serves exactly one connection: the process's own
stdin/stdout, piped from a parent such as SSH ProxyCommand. When that
connection ended, gost lingered forever. The service's accept loop runs
in a fire-and-forget goroutine and the process blocks on go-svc's
signal wait, so it never exited unless the parent sent a terminating
signal.
On macOS (darwin/arm64) the ProxyCommand child does not reliably
receive that signal, so gost hung after ssh quit.
Close the listener and call os.Exit when the stdio connection closes,
making exit deterministic regardless of whether the parent signals it.
Ref go-gost/gost#433.
When no custom resolver or host mapper is configured, xnet.Resolve now
resolves hostnames via Go's native pure-Go resolver (PreferGo: true)
instead of returning the hostname unchanged.
Previously, the unresolved hostname would reach net.Dialer.DialContext,
which on CGO_ENABLED=1 builds used cgo-based DNS — blocking a dedicated
OS thread per concurrent lookup. At scale (1000+ listeners), this
exhausted Go's 10000-thread limit.
Fixesgo-gost/gost#550
The standard Prometheus ProcessCollector uses procfs (Linux-only /proc),
so process_resident_memory_bytes and process_virtual_memory_bytes were
silently absent on FreeBSD, Darwin, and other non-Linux platforms.
- Switch to a custom prometheus.Registry to isolate GOST metrics from
the default registry auto-registrations
- Add gopsutil/v3-based process collector (process_other.go) for
platforms without procfs (!linux && !windows)
- Keep standard ProcessCollector (process_standard.go) on Linux/Windows
- Update metrics service and handler/metrics to serve from
promhttp.HandlerFor(customRegistry) instead of promhttp.Handler()
- Add Registry() accessor for the custom registry
Fixesgo-gost/gost#509
The auto handler only recognized SOCKS4 (0x04), SOCKS5 (0x05), and HTTP
(first byte) as protocol indicators. TLS ClientHello bytes (0x16) fell
through to the HTTP handler, which called http.ReadRequest() on binary
TLS data and returned a malformed-HTTP error.
Add protocol sniffing via sniffing.Sniff() to detect TLS. When detected,
delegate to sniffing.Sniffer.HandleTLS() which parses the ClientHello
for SNI, dials upstream through the chain router (respecting -F config),
and proxies the TLS connection transparently.
Fixesgo-gost/gost#492
When xmetrics.IsEnabled() is false (no -api / no metrics.addr configured),
WrapListener now returns the listener unchanged instead of wrapping every
accepted connection in a metrics.serverConn. This allows bare *net.TCPConn
to reach the forwarding layer, enabling future splice(2) optimization.
On Windows, wintun.dll may pass an invalid pointer to the logMessage
callback, causing a nil pointer dereference in UTF16PtrToString that
panics the entire process. The upstream wintun-go library has not fixed
this since 2021.
Add defer/recover in tun/tungo/tap listenLoop inner closures to convert
panics from createTun/createTap into logged errors, allowing the retry
loop to recover gracefully instead of crashing the process.
Fixesgo-gost/gost#482
sniffer_http:
When DNS override directs multiple domains to the same proxy IP, the
browser may reuse a keep-alive connection for a different host. The
HTTP keep-alive loop now detects Host header changes and re-dials a
new upstream connection with correct node selection, preventing CDN
errors (Fastly unknown domain, CloudFront 403).
sniffer_tls:
Return a descriptive error when TLS ClientHello has no SNI, instead
of silently returning nil. This makes the connection drop visible in
logs and recorder output.
Fixesgo-gost/gost#479
The stdio listener wraps os.Stdin/os.Stdout as a net.Listener that accepts
exactly one connection. It enables GOST to be used as an SSH ProxyCommand,
where the parent process (SSH) pipes the transport byte stream through the
child process's standard I/O.
Usage: gost -L stdio://example.com:22 -F http://proxy:8080
The URL host:port is treated as the forwarding target and converted to a
forward node in buildServiceConfig. The standard forward handler then
routes traffic through the configured chain to the destination.
Fixesgo-gost/gost#433
Add a wrapper that intercepts WriteTo on the
client-facing SOCKS5 UDP relay and resolves domain addresses to IPs
before the SOCKS5 header is encoded. Controlled via the
(or ) handler metadata flag.
When enabled, SOCKS5 UDP response datagrams always carry ATYP=IPv4 or
ATYP=IPv6 — never ATYP=Domain (0x03) — making them compatible with
clients like tun2proxy and Surge that cannot parse domain-typed
addresses in UDP.
The wrapper resolves domains through the router's infrastructure:
host mapper → resolver → system DNS fallback. Unresolvable domains
cause the datagram to be silently dropped rather than forwarded in a
format the client rejects.
Fixesgo-gost/gost#434
Set http.Server.ErrorLog to a logWriter that routes HTTP server errors
(TLS handshake failures, malformed requests) to the GOST logger at Debug
level instead of escaping to stderr via log.Printf.
Without this, network scanners and protocol filters probing the WSS port
produce uncontrolled output:
http: TLS handshake error from ...
Also downgrade WebSocket upgrade failures from Error to Warn — plain HTTP
requests hitting the WebSocket endpoint are operational noise.
Fixesgo-gost/gost#419
User-configured metadata on recorder objects (recorders[].metadata in YAML)
was silently discarded — MetadataRecordOption existed but was never called
anywhere in the codebase, causing plugin (HTTP/gRPC) recorders to always
receive null metadata.
Fix: wrap recorders that carry config metadata in MetadataRecorder, which
auto-appends the metadata to every Record() call. This covers all paths
(handler, router, sniffer, service) with zero call-site changes.
When an SSH session behind an SSHD dialer dies silently (NAT timeout,
server disconnect, idle TCP drop), IsClosed() may still return false
because the health-check goroutine hasn't detected the failure yet.
Returning this dead cached session to the connector causes:
ssh: unexpected packet in response to channel open:
Add a Ping(req)-based liveness check before returning a cached session.
If the ping fails, evict the session so the next Dial rebuilds a fresh
connection. This matches the dead-session eviction pattern already used
by the SSH, KCP, QUIC, and ICMP dialers.
Also export the ping-as-health-check as Session.Ping(timeout) so it can
be used by external health probes. Retain the existing ping() helper
unmodified.
The ICMP dialer required explicit keepalive:true to send QUIC PING frames,
while the regular QUIC dialer enabled keepalive by default (10s period).
Without PING frames, quic-go's 30s idle timeout silently killed connections,
causing HTTP+ICMP tunnels to hang after periods of inactivity.
Fixesgo-gost/gost#352
Also in this commit:
- Release session mutex before calling GetConn() in both ICMP and QUIC
dialers, so a dead session doesn't block all Dial() calls while
OpenStreamSync blocks
- Add 30s timeout context to OpenStreamSync to prevent indefinite blocking
if the QUIC session dies between liveness check and stream open
- Guard session cache deletion with pointer identity check to avoid
evicting a newly created session during a race
transportClient and transportServer each launch two goroutines for
bidirectional copy between the TUN device and the remote connection.
Previously, when one goroutine errored, the function returned
immediately while the sibling goroutine continued running — reading
from and writing to connections that would soon be closed by the
caller's deferred cleanup. In the retry loop of handleClient and
handleServer, stale goroutines accumulated across iterations, racing
with new goroutines for the TUN device and writing to closed pipes.
This caused the "io: read/write on closed pipe" error reported in
go-gost/gost#345, and more importantly, prevented recovery because
subsequent retry iterations operated on a corrupted state.
Fix:
- Derive a per-transport context in transportClient/transportServer
and check it at the top of each goroutine's loop to allow the
first-failing goroutine to signal its sibling to exit
- Replace the single-error select with a collectFirstError helper
that drains both goroutines and includes a timeout guard (5s) to
prevent deadlock when a goroutine is stuck in a non-cancelable read
- Use a per-iteration context in handleClient for the keepalive
goroutine so it is properly cancelled when an iteration ends
- Fix handleServer to use errors.Is(err, ErrTun) for consistency
- Fix transportServer's errc buffer from 1 to 2 to prevent a
goroutine leak when both goroutines error simultaneously
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
Removes bindDevice from dialOnce's UDP empty-addr path. For relay/listener
UDP sockets, the ListenUDP laddr binding already pins the source IP correctly.
The additional SO_BINDTODEVICE forced all outbound datagrams through the named
interface, which conflicts with the kernel routing table for unconnected UDP
sockets and causes silent packet drops — breaking SOCKS5 UDP associate when
interface is configured.
Fixesgo-gost/gost#287
Adds a catch-all fallback to hostMapper.Lookup() that matches any
hostname when a '.' mapping exists. After the existing three-phase
matching (exact -> dot-prefix -> suffix walk) fails, the lookup now
checks for a standalone '.' entry as a final fallback.
This enables users to map all hostnames to a single IP (e.g., for SNI
proxy usage) with a simple configuration like 'hosts=.:<ip>'.
Fixesgo-gost/gost#228
When a QUIC session's MaxIdleTimeout expires, the underlying *quic.Conn dies
but the dead quicSession stays in the sessions map. The next Dial() finds
it and calls session.GetConn() which calls OpenStreamSync(context.Background())
against the dead connection — blocking indefinitely.
Add IsClosed() to both quicSession types (using the session context's Done()
channel) and add the liveness guard in both Dial() methods, matching the
existing pattern in KCP and MASQUE dialers.
Fixesgo-gost/gost#225
Add remote config fetching capability to the -C CLI flag, enabling
centralized fleet management of gost nodes.
- readConfig() now detects http:// and https:// URLs and fetches
them via HTTP GET with a 30s timeout and shared client pool
- Format auto-detection from Content-Type header (using mime
parsing) with fallback to URL path extension (.yaml/.json)
- 10 MiB response size limit to prevent memory exhaustion
- URL userinfo stripped from error messages for safety
- Fix ReadFile to force viper config type from file extension,
preventing format detection ambiguity
- Fix viper config search path fallback: skip cfg.Load() when
-C flags are explicitly provided, avoiding unwanted merges
- Tests: URL fetch (YAML/JSON), non-200, oversize, detectFormat,
isHTTPURL, sanitizeURL, and combined file+URL Parse scenario
Allow passing -C multiple times to load and merge several configuration
files in order. Slice fields are appended; scalar fields (TLS, Log, API,
Metrics, Profiling) are overridden by later files — the same semantics as
the existing mergeConfig() used for CLI+config merging.
- Change Args.CfgFile string to Args.CfgFiles []string
- Extract readConfig() helper from Parse() for single-source loading
- Loop over CfgFiles in Parse(), merging each into the accumulator
- Add Quotas to mergeConfig (was missing from the slice list)
- Add TestParse_MultiFile integration test for two-file merge
Closesgo-gost/gost#150
Add missing IPV6_TRANSPARENT socket option to the TCP redirect listener
Control callback, matching what the UDP redirect listener already sets.
Without this, the kernel silently drops IPv6 TPROXY-redirected connections.
Also clean up handler_linux.go getOriginalDstAddr:
- Remove encoding/binary import and heap allocation for port conversion
- Replace with zero-allocation ntohs (native-to-network byte order swap)
- Document the struct layout hack where GetsockoptIPv6Mreq and
GetsockoptIPv6MTUInfo are used to read sockaddr_in/sockaddr_in6
from SO_ORIGINAL_DST (kernel returns smaller structs than the
getter functions expect, but only the first N bytes are populated)
Fixesgo-gost/gost#126
When no forwarder or dns metadata is configured, the DNS handler now
reads system nameservers from /etc/resolv.conf (Unix) before falling
back to the hardcoded 127.0.0.1:53 default. This makes the DNS proxy
work out-of-the-box without requiring explicit DNS server configuration.
Fixesgo-gost/gost#89
Add a new "utls" dialer type that uses the refraction-networking/utls
library to mimic browser TLS fingerprints (Chrome, Firefox, Safari, etc.).
- x/dialer/utls/dialer.go: Registered as "utls", mirrors the TLS dialer
with Handshake() using utls.UClient() for fingerprint emulation.
- x/dialer/utls/fingerprint.go: Maps string names (chrome, firefox, ios,
safari, edge, randomized, golang, custom) to utls.ClientHelloID presets.
- x/dialer/utls/metadata.go: Parses fingerprint from dialer metadata.
- go.mod: Add github.com/refraction-networking/utls v1.8.2.
The fingerprint is dialer-only metadata — the standard TLS dialer is
untouched. Falls back to crypto/tls if no fingerprint is configured.
Closesgo-gost/gost#31
When a TUN listener with `route=::/0` (or any route) creates its
fallback @internal router during parseMetadata/Init, the router
immediately calls setSysRoutes before the TUN device exists. This
causes an ENETUNREACH "no route to host" error logged by the kernel
because the gateway is unreachable at that point.
The system routes are correctly added later by the listener's own
addRoutes() after device creation. The @internal router only needs
in-memory routes for GetRoute lookups.
Add NoSysRouteOption which disables netlink route management while
keeping route data for in-memory queries. Use it in the TUN
listener's @internal router.
Fixesgo-gost/x#48
- listener/http3: default enableDatagrams to true when not explicitly set,
so CONNECT-UDP (RFC 9298) works out of the box without requiring
?enableDatagrams=true in the config URL
- handler/masque: dial target before sending 200 OK in handleConnectUDP,
matching the handleConnectTCP order; if target dial fails, the handler
can still return an error status instead of having already committed 200
- handler/masque: add missing WriteHeader(BadRequest) when ResolveUDPAddr
fails, so the client gets a proper HTTP error instead of an opaque
H3_REQUEST_CANCELLED stream reset
Fixes#103
The QUIC listener and the QUIC/ICMP dialers unconditionally set
tlsCfg.NextProtos = ["h3", "quic/v1"], discarding any user-specified
ALPN values from TLS options (via tls.options.alpn in config).
Clone the TLS config and only apply the default NextProtos when none are
already configured, matching the existing pattern in the MASQUE HTTP/3
dialer. This enables non-HTTP/3 QUIC use cases like SMB-over-QUIC which
requires ALPN "smb".
Fixesgo-gost/gost#872
stats.WrapUDPConn returned nil when pStats was nil (introduced in 7c95d40),
but callers in the kcp and rudp listeners passed the result directly to
admission.WrapUDPConn and limiter.WrapUDPConn, which wrapped a nil PacketConn.
When service.Serve() called conn.LocalAddr(), the auto-generated method
delegated to the nil PacketConn, causing a panic.
Root cause: WrapUDPConn behavior was inconsistent with WrapConn and
WrapPacketConn in the same package, which both return the original connection
instead of nil when the optional config is absent.
Fixes:
1. listener/kcp, listener/rudp — guard stats.WrapUDPConn with Stats != nil
(consistent with quic and wt listeners which already had this guard).
2. observer/stats/wrapper — when pStats is nil, pass through the original
connection instead of returning nil (matches WrapConn/WrapPacketConn).
3. admission/wrapper, limiter/traffic/wrapper — add defensive nil guards:
nil pc → return nil; nil config → pass through original connection.
All four WrapUDPConn implementations now share the same nil semantics.
4. listener/udp_wrapper_safety_test.go — regression test that verifies the
full metrics→stats→admission→limiter chain with all optional configs nil
does not produce a wrapper with a nil internal PacketConn.
Fixes: go-gost/gost#873
The switchNetns function was only defined for linux (dialer_netns.go,
build tag linux && !android) and android (dialer_android.go, stub).
This left darwin, freebsd, openbsd, windows, and other platforms with
an undefined symbol at dialer.go:55.
Add no-op stubs to all remaining platform files so the dialer package
compiles on every GOOS.
The go-gost fork of go-shadowsocks2 dropped built-in support for the
none/dummy cipher that was present in the original go-shadowsocks2.
Combined with the SS components' hard requirement for auth (and
therefore a valid cipher), this made gost fail to start with
method=none or method=dummy.
Add a no-op cipher in x/internal/util/ss/none/ that implements the
core.ShadowCipher interface using the standard go-shadowsocks2 AEAD
framing (salt + length-prefixed chunks, target address embedding)
without actual encryption. SaltSize=16 ensures random salts on every
connection to avoid bloom-ring replay detection.
Update SS TCP connector/handler and SS UDP connector/handler to detect
method=none/dummy (case-insensitive) and use the no-op cipher instead
of utils.NewClientConfig/NewServerConfig.
Fixesgo-gost/x#105
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.
Drop the external github.com/sirupsen/logrus dependency in favor of Go's
standard log/slog package (available since Go 1.21). The core/logger.Logger
interface is preserved unchanged — this is a pure implementation swap.
Key changes:
- slogLogger replaces logrusLogger, backed by slog.Logger + slog.LevelVar
- Custom levelTrace (-8) and levelFatal (+12) constants extend slog's
built-in 4 levels to cover the 6-level logrus-compatible range
- replaceAttr normalises output: lowercase level names and RFC 3339
timestamps with milliseconds (matches previous logrus JSON format)
- Shared *slog.LevelVar ensures WithFields clones inherit parent level
- Level guard (early return) in log/logf avoids wasted fmt.Sprint/Sprintf
when the message level is below the configured threshold
- Documented the stack depth assumption for the caller skip=3 frame
Test coverage (14 tests, all passing with -race):
- convertLevel/revertLevel round-trip for all 6 levels
- levelString for all levels including custom trace/fatal
- replaceAttr timestamp format, level name, groups passthrough
- caller format, level guard, WithFields, IsLevelEnabled, GetLevel
When Accept() returns a transient error, the service enters StateFailed,
sleeps for the retry delay, then loops back to Accept(). Previously the
state stayed StateFailed until the next successful Accept() — which
could take arbitrarily long for idle services, making status observers
see a stale 'error' even though the service has already reconnected
and is ready.
Now set StateReady (and clear lastError) immediately after the retry
sleep. The redundant state transition on successful Accept is removed
since recovery is handled once after the sleep.
When Accept() returns a transient error, the service enters StateFailed,
sleeps for the retry delay, then loops back to Accept(). Previously the
state stayed StateFailed until the next successful Accept() — which
could take arbitrarily long for idle services, making status observers
see a stale 'error' even though the service has already reconnected
and is ready.
Now set StateReady (and clear lastError) immediately after the retry
sleep. Accept will block until the next connection, but the state
correctly reflects that the service is functional.
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