chore: bump version to 0.6.8

将Info.plist的LSUIElement改为true，应用以accessory模式启动，
永不显示Dock图标和系统菜单栏。移除运行时切换Dock可见性的
showDockIcon()/hideDockIcon()及其C实现setDockIconVisible，
这些调用在accessory模式下已无意义。activateApp()保留用于
窗口置于前台获取焦点。

Makefile

@@ -11,12 +11,18 @@ GO          = go
 CGO_ENABLED = 1
 WINDRES     ?= x86_64-w64-mingw32-windres
 MINGW_CC    ?= x86_64-w64-mingw32-gcc
-SEMVER      ?= 0.6.5
+SEMVER      ?= 0.6.8
 GIT_HASH    = $(shell git rev-parse --short HEAD 2>/dev/null || echo unknown)
 VERSION     = $(SEMVER)-$(GIT_HASH)
 LDFLAGS     = -s -w -X lmvpn/internal/version.Version=$(VERSION)
 
-.PHONY: all build app run daemon clean vet tidy fmt icon icon-windows build-windows installer-windows
+# Code signing (optional). Set these to sign the .app bundle with a
+# Developer ID certificate, enabling biometric (Touch ID) keychain access.
+# Example: make app CODESIGN_IDENTITY="Developer ID Application: Name (ABCDE12345)" TEAM_ID=ABCDE12345
+CODESIGN_IDENTITY ?=
+TEAM_ID          ?=
+
+.PHONY: all build app run daemon clean vet tidy fmt icon icon-windows build-windows installer-windows sign
 
 ## all: build the .app bundle (default)
 all: app
@@ -41,8 +47,39 @@ app: build
 	@if [ -f resources/icon.icns ]; then \
 		cp resources/icon.icns $(APP_BUNDLE)/Contents/Resources/icon.icns; \
 	else echo "  (no icon.icns found, skipping icon)"; fi
+	@if [ -n "$(CODESIGN_IDENTITY)" ]; then $(MAKE) sign; \
+	else echo "  (skipping code signing - set CODESIGN_IDENTITY and TEAM_ID to enable Touch ID keychain)"; fi
 	@echo "Built $(APP_BUNDLE)"
 
+## sign: code-sign the .app bundle with a Developer ID certificate
+## Requires CODESIGN_IDENTITY and TEAM_ID to be set.
+sign:
+	@if [ -z "$(CODESIGN_IDENTITY)" ]; then \
+		echo "ERROR: CODESIGN_IDENTITY not set."; \
+		echo "Usage: make sign CODESIGN_IDENTITY='Developer ID Application: Name (TEAMID)' TEAM_ID=TEAMID"; \
+		exit 1; \
+	fi
+	@if [ -z "$(TEAM_ID)" ]; then \
+		echo "ERROR: TEAM_ID not set."; \
+		exit 1; \
+	fi
+	@tmp=$$(mktemp LMVPN.entitlements.XXXXXX); \
+	sed 's/\$$(AppIdentifierPrefix)/$(TEAM_ID)./' resources/LMVPN.entitlements > $$tmp; \
+	codesign --force --options runtime \
+		--sign "$(CODESIGN_IDENTITY)" \
+		--entitlements $$tmp \
+		$(APP_BUNDLE)/Contents/MacOS/$(GUI_BIN); \
+	codesign --force --options runtime \
+		--sign "$(CODESIGN_IDENTITY)" \
+		--entitlements $$tmp \
+		$(APP_BUNDLE)/Contents/MacOS/$(DAEMON_BIN); \
+	codesign --force --options runtime \
+		--sign "$(CODESIGN_IDENTITY)" \
+		--entitlements $$tmp \
+		$(APP_BUNDLE); \
+	rm -f $$tmp
+	@echo "Signed $(APP_BUNDLE) with identity: $(CODESIGN_IDENTITY)"
+
 ## icon: generate icon.icns from resources/icon.png (or resources/logo.svg)
 icon:
 	@if [ -f resources/logo.svg ] && [ ! -f resources/icon.png -o resources/logo.svg -nt resources/icon.png ]; then \

internal/keychain/keychain.go

@@ -19,6 +19,12 @@ const ServiceName = paths.BundleID
 // ErrNotFound is returned when a secret is not present in the store.
 var ErrNotFound = fmt.Errorf("secret not found")
 
+// ErrSecMissingEntitlement is returned when the biometric keychain path
+// fails because the app lacks the required code-signing entitlements
+// (errSecMissingEntitlement, OSStatus -34018). Callers should fall back
+// to the non-biometric keychain path when this error is encountered.
+var ErrSecMissingEntitlement = fmt.Errorf("missing keychain entitlement")
+
 // ErrUserCanceled is returned when the user cancels a biometric
 // authentication prompt (e.g. Touch ID) or the system cannot complete
 // authentication.

internal/keychain/keychain_darwin.go

@@ -3,7 +3,9 @@
 package keychain
 
 import (
+	"errors"
 	"fmt"
+	"sync"
 
 	"github.com/keybase/go-keychain"
 )
@@ -26,6 +28,36 @@ func SetTouchIDPrompt(prompt string) {
 	}
 }
 
+// biometricDisabled tracks whether the biometric keychain path has been
+// disabled at runtime. This happens when a biometric operation fails with
+// errSecMissingEntitlement (-34018), indicating the app lacks the required
+// code-signing entitlements. Once disabled, all subsequent operations use
+// the non-biometric file-based keychain path.
+var (
+	biometricDisabled   bool
+	biometricDisabledMu sync.Mutex
+)
+
+// shouldUseBiometric reports whether the biometric keychain path should be
+// used. It returns false if biometric storage has been disabled at runtime
+// (e.g. due to missing entitlements on an ad-hoc signed build).
+func shouldUseBiometric() bool {
+	if !biometricAvailable() {
+		return false
+	}
+	biometricDisabledMu.Lock()
+	defer biometricDisabledMu.Unlock()
+	return !biometricDisabled
+}
+
+// disableBiometric disables the biometric keychain path for all subsequent
+// operations, forcing a fallback to the non-biometric file-based keychain.
+func disableBiometric() {
+	biometricDisabledMu.Lock()
+	defer biometricDisabledMu.Unlock()
+	biometricDisabled = true
+}
+
 // DarwinStore implements Store using the macOS Keychain.
 type DarwinStore struct{}
 
@@ -37,18 +69,15 @@ func New() Store {
 	return DarwinStore{}
 }
 
-func (DarwinStore) setItem(account, secret string) error {
+// setItemPlain stores a secret in the file-based keychain (no biometric
-	// Use biometric-protected storage when Touch ID is available.
+// protection) using the keybase/go-keychain library.
-	if biometricAvailable() {
+func setItemPlain(account, secret string) error {
-		return storeBiometricItemGo(ServiceName, account, secret)
-	}
 	item := keychain.NewItem()
 	item.SetSecClass(keychain.SecClassGenericPassword)
 	item.SetService(ServiceName)
 	item.SetAccount(account)
 	item.SetData([]byte(secret))
 	item.SetAccessible(keychain.AccessibleAfterFirstUnlock)
-	// Delete any existing item first (Add fails on duplicates).
 	_ = keychain.DeleteItem(item)
 	if err := keychain.AddItem(item); err != nil {
 		return fmt.Errorf("keychain add %s: %w", account, err)
@@ -56,12 +85,8 @@ func (DarwinStore) setItem(account, secret string) error {
 	return nil
 }
 
-func (DarwinStore) getItem(account string) (string, error) {
+// getItemPlain retrieves a secret from the file-based keychain.
-	// When Touch ID is available, use the direct CGo path which can
+func getItemPlain(account string) (string, error) {
-	// show a biometric prompt for protected items.
-	if biometricAvailable() {
-		return getBiometricItemGo(ServiceName, account, touchIDPrompt)
-	}
 	item := keychain.NewItem()
 	item.SetSecClass(keychain.SecClassGenericPassword)
 	item.SetService(ServiceName)
@@ -78,12 +103,8 @@ func (DarwinStore) getItem(account string) (string, error) {
 	return string(results[0].Data), nil
 }
 
-func (DarwinStore) deleteItem(account string) error {
+// deleteItemPlain deletes a secret from the file-based keychain.
-	// Use the direct CGo delete which works for both biometric and
+func deleteItemPlain(account string) error {
-	// non-biometric items (and doesn't trigger a Touch ID prompt).
-	if biometricAvailable() {
-		return deleteBiometricItemGo(ServiceName, account)
-	}
 	item := keychain.NewItem()
 	item.SetSecClass(keychain.SecClassGenericPassword)
 	item.SetService(ServiceName)
@@ -91,6 +112,57 @@ func (DarwinStore) deleteItem(account string) error {
 	return keychain.DeleteItem(item)
 }
 
+func (DarwinStore) setItem(account, secret string) error {
+	if shouldUseBiometric() {
+		err := storeBiometricItemGo(ServiceName, account, secret)
+		if err == nil {
+			return nil
+		}
+		if errors.Is(err, ErrSecMissingEntitlement) {
+			disableBiometric()
+			// Fall through to non-biometric path.
+		} else {
+			return err
+		}
+	}
+	return setItemPlain(account, secret)
+}
+
+func (DarwinStore) getItem(account string) (string, error) {
+	if shouldUseBiometric() {
+		secret, err := getBiometricItemGo(ServiceName, account, touchIDPrompt)
+		if err == nil {
+			return secret, nil
+		}
+		if errors.Is(err, ErrSecMissingEntitlement) {
+			disableBiometric()
+			// Fall through to non-biometric path.
+		} else if errors.Is(err, ErrNotFound) {
+			// Item not in the Data Protection Keychain; it may have
+			// been stored via the non-biometric path. Fall through.
+		} else {
+			return "", err
+		}
+	}
+	return getItemPlain(account)
+}
+
+func (DarwinStore) deleteItem(account string) error {
+	if shouldUseBiometric() {
+		err := deleteBiometricItemGo(ServiceName, account)
+		if err == nil {
+			return nil
+		}
+		if errors.Is(err, ErrSecMissingEntitlement) {
+			disableBiometric()
+			// Fall through to non-biometric path.
+		} else {
+			return err
+		}
+	}
+	return deleteItemPlain(account)
+}
+
 func (s DarwinStore) SetPassword(profileName, password string) error {
 	return s.setItem(passwordAccountPrefix+profileName, password)
 }

internal/keychain/keychain_darwin_touchid.go

@@ -215,6 +215,11 @@ import (
 // when the user cancels a Touch ID / password prompt (-128).
 const errSecUserCanceled = -128
 
+// errSecMissingEntitlementCode is errSecMissingEntitlement (-34018),
+// returned by the Data Protection Keychain when the app is not properly
+// code-signed with keychain-access-groups entitlement.
+const errSecMissingEntitlementCode = -34018
+
 var (
 	biometricCacheOnce sync.Once
 	biometricCacheVal  bool
@@ -293,6 +298,9 @@ func storeBiometricItemGo(service, account, secret string) error {
 
 	status := C.storeBiometricItem(svcRef, accRef, dataRef)
 	if status != 0 {
+		if status == errSecMissingEntitlementCode {
+			return fmt.Errorf("keychain biometric store %s: %w", account, ErrSecMissingEntitlement)
+		}
 		return fmt.Errorf("keychain biometric store %s: OSStatus %d", account, status)
 	}
 	return nil
@@ -329,6 +337,9 @@ func getBiometricItemGo(service, account, prompt string) (string, error) {
 		return "", ErrUserCanceled
 	}
 	if status != 0 {
+		if status == errSecMissingEntitlementCode {
+			return "", fmt.Errorf("keychain biometric get %s: %w", account, ErrSecMissingEntitlement)
+		}
 		return "", fmt.Errorf("keychain biometric get %s: OSStatus %d", account, status)
 	}
 	defer cfRelease(C.CFTypeRef(dataOut))
@@ -354,6 +365,9 @@ func deleteBiometricItemGo(service, account string) error {
 
 	status := C.deleteBiometricItem(svcRef, accRef)
 	if status != 0 {
+		if status == errSecMissingEntitlementCode {
+			return fmt.Errorf("keychain biometric delete %s: %w", account, ErrSecMissingEntitlement)
+		}
 		return fmt.Errorf("keychain biometric delete %s: OSStatus %d", account, status)
 	}
 	return nil

internal/transport/racedial.go

@@ -99,13 +99,13 @@ func raceDial(ctx context.Context, network string, ips []string, port string) (n
 		go func(target string) {
 			d := &net.Dialer{}
 			c, err := d.DialContext(raceCtx, network, net.JoinHostPort(target, port))
-			select {
+			// Always send the result: resultCh is buffered (len(ips)),
-			case resultCh <- result{conn: c, err: err}:
+			// so this never blocks. Do NOT use a select with
-			case <-raceCtx.Done():
+			// <-raceCtx.Done() here - when the context is cancelled
-				if c != nil {
+			// both cases would be ready and Go's random select pick
-					c.Close()
+			// could skip the send, causing the drain loop below to
-				}
+			// block forever.
-			}
+			resultCh <- result{conn: c, err: err}
 		}(ip)
 	}
 
@@ -117,7 +117,8 @@ func raceDial(ctx context.Context, network string, ips []string, port string) (n
 			// any late successful connections.
 			cancel()
 			for j := i + 1; j < len(ips); j++ {
-				if late := <-resultCh; late.conn != nil {
+				late := <-resultCh
+				if late.conn != nil {
 					late.conn.Close()
 				}
 			}

internal/transport/racedial_test.go

@@ -0,0 +1,133 @@
+package transport
+
+import (
+	"context"
+	"net"
+	"sync"
+	"testing"
+	"time"
+)
+
+// TestRaceDialNoDeadlock is a regression test for a select race
+// condition that caused raceDial to deadlock ~50% of the time when
+// multiple IPs were raced and the first succeeded. The bug was a
+// select with two simultaneously-ready cases (send result vs
+// <-raceCtx.Done()); Go's random selection could skip the send,
+// leaving the drain loop blocked forever.
+//
+// We run many iterations because the bug was probabilistic.
+func TestRaceDialNoDeadlock(t *testing.T) {
+	const iterations = 200
+
+	for n := 0; n < iterations; n++ {
+		ln, err := net.Listen("tcp", "127.0.0.1:0")
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		// Accept both connections in background (both IPs dial the
+		// same listener since raceDial uses a single port).
+		go func() {
+			for {
+				c, err := ln.Accept()
+				if err != nil {
+					return
+				}
+				c.Close()
+			}
+		}()
+
+		port := portOf(ln.Addr())
+		ips := []string{"127.0.0.1", "127.0.0.1"}
+
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		conn, err := raceDial(ctx, "tcp", ips, port)
+		cancel()
+		if err == nil && conn != nil {
+			conn.Close()
+		}
+
+		ln.Close()
+
+		// If we get here without the 5s timeout, the iteration passed.
+		// A deadlock would trigger the test-wide 60s timeout.
+	}
+
+	// If we reach here, no iteration deadlocked.
+}
+
+// TestRaceDialAllFail verifies that when all dials fail, raceDial
+// returns an error instead of blocking.
+func TestRaceDialAllFail(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	// Port 1: connection refused on most systems.
+	ips := []string{"127.0.0.1", "127.0.0.1"}
+	_, err := raceDial(ctx, "tcp", ips, "1")
+	if err == nil {
+		t.Fatal("expected error when all dials fail")
+	}
+}
+
+// TestRaceDialSingleIP verifies the single-IP path still works.
+func TestRaceDialSingleIP(t *testing.T) {
+	ln, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer ln.Close()
+
+	var wg sync.WaitGroup
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		c, _ := ln.Accept()
+		if c != nil {
+			c.Close()
+		}
+	}()
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	conn, err := raceDial(ctx, "tcp", []string{"127.0.0.1"}, portOf(ln.Addr()))
+	if err != nil {
+		t.Fatalf("raceDial single IP: %v", err)
+	}
+	conn.Close()
+	wg.Wait()
+}
+
+// TestRaceDialContextCancelled ensures raceDial returns promptly when
+// the parent context is cancelled while dials are in flight.
+func TestRaceDialContextCancelled(t *testing.T) {
+	// Dial a non-routable address so the dial hangs until context
+	// cancellation.
+	ctx, cancel := context.WithCancel(context.Background())
+	go func() {
+		time.Sleep(200 * time.Millisecond)
+		cancel()
+	}()
+
+	done := make(chan error, 1)
+	go func() {
+		_, err := raceDial(ctx, "tcp", []string{"10.255.255.1", "10.255.255.2"}, "80")
+		done <- err
+	}()
+
+	select {
+	case err := <-done:
+		if err == nil {
+			t.Fatal("expected error on cancelled context")
+		}
+	case <-time.After(5 * time.Second):
+		t.Fatal("raceDial did not return after context cancellation")
+	}
+}
+
+// portOf extracts the port from a net.Addr.
+func portOf(addr net.Addr) string {
+	_, port, _ := net.SplitHostPort(addr.String())
+	return port
+}

internal/ui/app.go

@@ -130,7 +130,6 @@ func Run() {
 				fyne.Do(func() {
 					a.windowHidden = false
 					activateApp()
-					showDockIcon()
 					a.window.Show()
 					a.window.RequestFocus()
 				})
@@ -149,7 +148,6 @@ func Run() {
 			if a.windowHidden {
 				a.windowHidden = false
 				activateApp()
-				showDockIcon()
 				fyne.Do(func() {
 					if a.windowHidden {
 						return
@@ -173,7 +171,6 @@ func Run() {
 	a.window.SetCloseIntercept(func() {
 		if cfg.CloseToTray {
 			a.windowHidden = true
-			hideDockIcon()
 			a.window.Hide()
 		} else {
 			a.quit()

internal/ui/dock_darwin.go

@@ -25,12 +25,6 @@ static BOOL appShouldHandleReopen(id self, SEL cmd, id sender, BOOL flag) {
     return YES;
 }
 
-static void setDockIconVisible(int visible) {
-	Class cls = objc_getClass("NSApplication");
-	id app = ((id (*)(Class, SEL))objc_msgSend)(cls, sel_getUid("sharedApplication"));
-	((void (*)(id, SEL, long))objc_msgSend)(app, sel_getUid("setActivationPolicy:"), visible ? 0 : 1);
-}
-
 static void cmActivateApp(void) {
 	Class cls = objc_getClass("NSApplication");
 	id app = ((id (*)(Class, SEL))objc_msgSend)(cls, sel_getUid("sharedApplication"));
@@ -53,9 +47,6 @@ static void cmRegisterReopenHandler(void) {
 */
 import "C"
 
-func showDockIcon() { C.setDockIconVisible(1) }
-func hideDockIcon() { C.setDockIconVisible(0) }
-
 func activateApp() { C.cmActivateApp() }
 
 func registerReopenHandler() { C.cmRegisterReopenHandler() }

internal/ui/dock_other.go

@@ -4,9 +4,6 @@ package ui
 
 var onAppActive func()
 
-func showDockIcon() {}
-func hideDockIcon() {}
-
 func activateApp() {}
 
 func registerReopenHandler() {}

internal/ui/tray.go

@@ -63,7 +63,6 @@ func (a *App) setupTray() {
 		fyne.NewMenuItem(i18n.T("TrayShowWindow"), func() {
 			a.windowHidden = false
 			activateApp()
-			showDockIcon()
 			a.window.Show()
 			a.window.RequestFocus()
 		}),

resources/Info.plist

@@ -32,7 +32,7 @@
 	<key>NSHighResolutionCapable</key>
 	<true/>
 	<key>LSUIElement</key>
-	<false/>
+	<true/>
 	<key>NSAppTransportSecurity</key>
 	<dict>
 		<key>NSAllowsArbitraryLoads</key>

resources/LMVPN.entitlements

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>keychain-access-groups</key>
+	<array>
+		<string>$(AppIdentifierPrefix)com.lmvpn.client</string>
+	</array>
+</dict>
+</plist>