feat(linter): add new linters G118 and G704
refactor(proxy): optimize proxy status slice initialization
fix(api): clarify comment regarding URL construction
fix(deps): upgrade github.com/hashicorp/yamux to v0.1.2
docs(flags): improve DNS server flag description
refactor(controller): simplify port range return logic
refactor(featuregate): optimize enabled features string conversion
* auth/oidc: cache OIDC access token and refresh before expiry
- Use Config.TokenSource(ctx) once at init to create a persistent
oauth2.TokenSource that caches the token and only refreshes on expiry
- Wrap with oauth2.ReuseTokenSourceWithExpiry for configurable early refresh
- Add tokenRefreshAdvanceDuration config option (default: 300s)
- Add unit test verifying token caching with mock HTTP server
* address review comments
* auth/oidc: fallback to per-request token fetch when expires_in is missing
When an OIDC provider omits the expires_in field, oauth2.ReuseTokenSource
treats the cached token as valid forever and never refreshes it. This causes
server-side OIDC verification to fail once the JWT's exp claim passes.
Add a nonCachingTokenSource fallback: after fetching the initial token, if
its Expiry is the zero value, swap the caching TokenSource for one that
fetches a fresh token on every request, preserving the old behavior for
providers that don't return expires_in.
* auth/oidc: fix gosec lint and add test for zero-expiry fallback
Suppress G101 false positive on test-only dummy token responses.
Add test to verify per-request token fetch when expires_in is missing.
Update caching test to account for eager initial token fetch.
* fix lint
Remove 4 redundant pointer map write-backs in OpenConnection,
CloseConnection, AddTrafficIn, and AddTrafficOut since the map stores
pointers and mutations are already visible without reassignment.
Optimize GetProxiesByTypeAndName from O(n) full map scan to O(1) direct
map lookup by proxy name.
- pkg/nathole: add RLock when reading clientCfgs map in PreCheck path
to prevent concurrent map read/write crash
- server/proxy: fix error variable shadowing in GetWorkConnFromPool
that could return a closed connection with nil error
- pkg/util/net: check ListenUDP error before spawning goroutines
and assign readConn to struct field so Close() works correctly
- Replace duplicate parseBasicAuth with existing httppkg.ParseBasicAuth
- Extract buildDomains helper in BaseProxy for HTTP/HTTPS/TCPMux proxies
- Extract toProxyStats helper to deduplicate ProxyStats construction
- Extract startVisitorListener helper in BaseProxy for STCP/SUDP proxies
- Extract acceptLoop helper in BaseVisitor for STCP/XTCP visitors
In AddPrefix, the loop `for _, p := range l.prefixes` creates a copy
of each element. Assignments to p.Value and p.Priority only modify
the local copy, not the original slice element, causing updates to
existing prefixes to be silently lost.
This affects client/service.go where AddPrefix is called with
Name:"runID" on reconnection — the old runID value would persist
in log output instead of being updated to the new one.
Fix by using index-based access `l.prefixes[i]` to modify the
original slice element, and add break since prefix names are unique.
- pkg/transport/tls.go: check AppendCertsFromPEM return value and
return clear error when CA file contains no valid PEM certificates
- pkg/plugin/client/http2http.go: set ReadHeaderTimeout to 60s to
match other plugins and prevent slow header attacks
- pkg/plugin/client/http2https.go: same ReadHeaderTimeout fix
- pkg/util/net/websocket.go: store ln parameter in struct to prevent
nil pointer panic when Addr() is called
- pkg/auth/oidc.go: replace unsynchronized []string with map + RWMutex
for subjectsFromLogin to fix data race across concurrent connections
- pkg/nathole/nathole.go: add pool.PutBuf(buf) on ReadFromUDP error
and DecodeMessageInto error paths in waitDetectMessage
- pkg/proto/udp/udp.go: add defer pool.PutBuf(buf) in writerFn to
ensure buffer is returned when the goroutine exits
Fix connection leaks in multiple error paths across client and server:
- server/proxy/http: close tmpConn when WithEncryption fails
- client/proxy: close localConn when ProxyProtocol WriteTo fails
- client/visitor/sudp: close visitorConn on all error paths in getNewVisitorConn
- client/visitor/xtcp: close tunnelConn when WithEncryption fails
- client/visitor/xtcp: close lConn when NewKCPConnFromUDP fails
- pkg/plugin/client/unix_domain_socket: close localConn and connInfo.Conn when WriteTo fails, close connInfo.Conn when DialUnix fails
- pkg/plugin/client/tls2raw: close tlsConn when Handshake or Dial fails
When frpc verify encounters config errors, the error messages now include
line/column information to help users locate problems:
- TOML syntax errors: report line and column from the TOML parser
(e.g., "toml: line 4, column 11: expected character ]")
- Type mismatch errors: report the field name and approximate line number
(e.g., "line 3: field \"proxies\": cannot unmarshal string into ...")
- File format detection: use file extension to determine format, preventing
silent fallthrough from TOML to YAML parser which produced confusing errors
Previously, a TOML file with syntax errors would silently fall through to the
YAML parser, which would misinterpret the content and produce unhelpful errors
like "json: cannot unmarshal string into Go value of type v1.ClientConfig".
https://claude.ai/code/session_017HWLfcXS3U2hLoy4dsg8Nv
Co-authored-by: Claude <noreply@anthropic.com>
