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derp/derpserver: clean up extraction of derp.Server (#17264)

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PR #17258 extracted `derp.Server` into `derp/derpserver.Server`.

This followup patch adds the following cleanups:
1. Rename `derp_server*.go` files to `derpserver*.go` to match
   the package name.
2. Rename the `derpserver.NewServer` constructor to `derpserver.New`
   to reduce stuttering.
3. Remove the unnecessary `derpserver.Conn` type alias.

Updates #17257
Updates #cleanup

Signed-off-by: Simon Law <sfllaw@tailscale.com>
This commit is contained in:
Simon Law 2025-09-24 10:38:30 -07:00 committed by GitHub
parent db02a46645
commit 34242df51b
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
12 changed files with 23 additions and 25 deletions
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2
cmd/derper/cert_test.go
View File

@ -131,7 +131,7 @@ func TestPinnedCertRawIP(t *testing.T) {
}
defer ln.Close()
ds := derpserver.NewServer(key.NewNode(), t.Logf)
ds := derpserver.New(key.NewNode(), t.Logf)
derpHandler := derpserver.Handler(ds)
mux := http.NewServeMux()

2
cmd/derper/derper.go
View File

@ -188,7 +188,7 @@ func main() {
serveTLS := tsweb.IsProd443(*addr) || *certMode == "manual"
s := derpserver.NewServer(cfg.PrivateKey, log.Printf)
s := derpserver.New(cfg.PrivateKey, log.Printf)
s.SetVerifyClient(*verifyClients)
s.SetTailscaledSocketPath(*socket)
s.SetVerifyClientURL(*verifyClientURL)

6
derp/derp_test.go
View File

@ -83,7 +83,7 @@ func TestClientInfoUnmarshal(t *testing.T) {
func TestSendRecv(t *testing.T) {
serverPrivateKey := key.NewNode()
s := derpserver.NewServer(serverPrivateKey, t.Logf)
s := derpserver.New(serverPrivateKey, t.Logf)
defer s.Close()
const numClients = 3
@ -305,7 +305,7 @@ func TestSendRecv(t *testing.T) {
func TestSendFreeze(t *testing.T) {
serverPrivateKey := key.NewNode()
s := derpserver.NewServer(serverPrivateKey, t.Logf)
s := derpserver.New(serverPrivateKey, t.Logf)
defer s.Close()
s.WriteTimeout = 100 * time.Millisecond
@ -549,7 +549,7 @@ const testMeshKey = "0123456789abcdef0123456789abcdef0123456789abcdef0123456789a
func newTestServer(t *testing.T, ctx context.Context) *testServer {
t.Helper()
logf := logger.WithPrefix(t.Logf, "derp-server: ")
s := derpserver.NewServer(key.NewNode(), logf)
s := derpserver.New(key.NewNode(), logf)
s.SetMeshKey(testMeshKey)
ln, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {

6
derp/derphttp/derphttp_test.go
View File

@ -44,7 +44,7 @@ func TestSendRecv(t *testing.T) {
clientKeys = append(clientKeys, priv.Public())
}
s := derpserver.NewServer(serverPrivateKey, t.Logf)
s := derpserver.New(serverPrivateKey, t.Logf)
defer s.Close()
httpsrv := &http.Server{
@ -172,7 +172,7 @@ func waitConnect(t testing.TB, c *derphttp.Client) {
func TestPing(t *testing.T) {
serverPrivateKey := key.NewNode()
s := derpserver.NewServer(serverPrivateKey, t.Logf)
s := derpserver.New(serverPrivateKey, t.Logf)
defer s.Close()
httpsrv := &http.Server{
@ -225,7 +225,7 @@ func TestPing(t *testing.T) {
const testMeshKey = "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
func newTestServer(t *testing.T, k key.NodePrivate) (serverURL string, s *derpserver.Server) {
s = derpserver.NewServer(k, t.Logf)
s = derpserver.New(k, t.Logf)
httpsrv := &http.Server{
TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler)),
Handler: derpserver.Handler(s),

16
derp/derpserver/derp_server.go → derp/derpserver/derpserver.go
View File

@ -57,8 +57,6 @@ import (
"tailscale.com/version"
)
type Conn = derp.Conn
// verboseDropKeys is the set of destination public keys that should
// verbosely log whenever DERP drops a packet.
var verboseDropKeys = map[key.NodePublic]bool{}
@ -181,7 +179,7 @@ type Server struct {
mu sync.Mutex
closed bool
netConns map[Conn]chan struct{} // chan is closed when conn closes
netConns map[derp.Conn]chan struct{} // chan is closed when conn closes
clients map[key.NodePublic]*clientSet
watchers set.Set[*sclient] // mesh peers
// clientsMesh tracks all clients in the cluster, both locally
@ -354,9 +352,9 @@ var bytesDropped = metrics.NewMultiLabelMap[dropReasonKindLabels](
"DERP bytes dropped by reason and by kind",
)
// NewServer returns a new DERP server. It doesn't listen on its own.
// New returns a new DERP server. It doesn't listen on its own.
// Connections are given to it via Server.Accept.
func NewServer(privateKey key.NodePrivate, logf logger.Logf) *Server {
func New(privateKey key.NodePrivate, logf logger.Logf) *Server {
var ms runtime.MemStats
runtime.ReadMemStats(&ms)
@ -369,7 +367,7 @@ func NewServer(privateKey key.NodePrivate, logf logger.Logf) *Server {
packetsRecvByKind: metrics.LabelMap{Label: "kind"},
clients: map[key.NodePublic]*clientSet{},
clientsMesh: map[key.NodePublic]PacketForwarder{},
netConns: map[Conn]chan struct{}{},
netConns: map[derp.Conn]chan struct{}{},
memSys0: ms.Sys,
watchers: set.Set[*sclient]{},
peerGoneWatchers: map[key.NodePublic]set.HandleSet[func(key.NodePublic)]{},
@ -570,7 +568,7 @@ func (s *Server) IsClientConnectedForTest(k key.NodePublic) bool {
// on its own.
//
// Accept closes nc.
func (s *Server) Accept(ctx context.Context, nc Conn, brw *bufio.ReadWriter, remoteAddr string) {
func (s *Server) Accept(ctx context.Context, nc derp.Conn, brw *bufio.ReadWriter, remoteAddr string) {
closed := make(chan struct{})
s.mu.Lock()
@ -910,7 +908,7 @@ func (s *Server) addWatcher(c *sclient) {
go c.requestMeshUpdate()
}
func (s *Server) accept(ctx context.Context, nc Conn, brw *bufio.ReadWriter, remoteAddr string, connNum int64) error {
func (s *Server) accept(ctx context.Context, nc derp.Conn, brw *bufio.ReadWriter, remoteAddr string, connNum int64) error {
br := brw.Reader
nc.SetDeadline(time.Now().Add(10 * time.Second))
bw := &lazyBufioWriter{w: nc, lbw: brw.Writer}
@ -1619,7 +1617,7 @@ type sclient struct {
// Static after construction.
connNum int64 // process-wide unique counter, incremented each Accept
s *Server
nc Conn
nc derp.Conn
key key.NodePublic
info derp.ClientInfo
logf logger.Logf

0
derp/derpserver/derp_server_default.go → derp/derpserver/derpserver_default.go
View File

0
derp/derpserver/derp_server_linux.go → derp/derpserver/derpserver_linux.go
View File

8
derp/derpserver/derpserver_test.go
View File

@ -330,7 +330,7 @@ func TestMultiForwarder(t *testing.T) {
func TestMetaCert(t *testing.T) {
priv := key.NewNode()
pub := priv.Public()
s := NewServer(priv, t.Logf)
s := New(priv, t.Logf)
certBytes := s.MetaCert()
cert, err := x509.ParseCertificate(certBytes)
@ -368,7 +368,7 @@ func TestServerDupClients(t *testing.T) {
// run starts a new test case and resets clients back to their zero values.
run := func(name string, dupPolicy dupPolicy, f func(t *testing.T)) {
s = NewServer(serverPriv, t.Logf)
s = New(serverPriv, t.Logf)
s.dupPolicy = dupPolicy
c1 = &sclient{key: clientPub, logf: logger.WithPrefix(t.Logf, "c1: ")}
c2 = &sclient{key: clientPub, logf: logger.WithPrefix(t.Logf, "c2: ")}
@ -618,7 +618,7 @@ func TestLimiter(t *testing.T) {
// single Server instance with multiple concurrent client flows.
func BenchmarkConcurrentStreams(b *testing.B) {
serverPrivateKey := key.NewNode()
s := NewServer(serverPrivateKey, logger.Discard)
s := New(serverPrivateKey, logger.Discard)
defer s.Close()
ln, err := net.Listen("tcp", "127.0.0.1:0")
@ -688,7 +688,7 @@ func BenchmarkSendRecv(b *testing.B) {
func benchmarkSendRecvSize(b *testing.B, packetSize int) {
serverPrivateKey := key.NewNode()
s := NewServer(serverPrivateKey, logger.Discard)
s := New(serverPrivateKey, logger.Discard)
defer s.Close()
k := key.NewNode()

2
prober/derp_test.go
View File

@ -146,7 +146,7 @@ func TestDerpProber(t *testing.T) {
func TestRunDerpProbeNodePair(t *testing.T) {
// os.Setenv("DERP_DEBUG_LOGS", "true")
serverPrivateKey := key.NewNode()
s := derpserver.NewServer(serverPrivateKey, t.Logf)
s := derpserver.New(serverPrivateKey, t.Logf)
defer s.Close()
httpsrv := &http.Server{

2
tstest/integration/integration.go
View File

@ -296,7 +296,7 @@ func exe() string {
func RunDERPAndSTUN(t testing.TB, logf logger.Logf, ipAddress string) (derpMap *tailcfg.DERPMap) {
t.Helper()
d := derpserver.NewServer(key.NewNode(), logf)
d := derpserver.New(key.NewNode(), logf)
ln, err := net.Listen("tcp", net.JoinHostPort(ipAddress, "0"))
if err != nil {

2
tstest/natlab/vnet/vnet.go
View File

@ -611,7 +611,7 @@ func newDERPServer() *derpServer {
ts.Close()
ds := &derpServer{
srv: derpserver.NewServer(key.NewNode(), logger.Discard),
srv: derpserver.New(key.NewNode(), logger.Discard),
tlsConfig: ts.TLS, // self-signed; test client configure to not check
}
var mux http.ServeMux

2
wgengine/magicsock/magicsock_test.go
View File

@ -111,7 +111,7 @@ func (c *Conn) WaitReady(t testing.TB) {
}
func runDERPAndStun(t *testing.T, logf logger.Logf, l nettype.PacketListener, stunIP netip.Addr) (derpMap *tailcfg.DERPMap, cleanup func()) {
d := derpserver.NewServer(key.NewNode(), logf)
d := derpserver.New(key.NewNode(), logf)
httpsrv := httptest.NewUnstartedServer(derpserver.Handler(d))
httpsrv.Config.ErrorLog = logger.StdLogger(logf)