Merge c8b456bf6a into b144d9926f

When a user explicitly logs out via the logout button, the session should
be removed immediately without grace period, allowing observers to be
promoted right away instead of waiting for the grace period to expire.

Changes:
- Close WebRTC connection immediately on logout
- Clear grace period marker for intentional logout detection
- Add logging to track logout vs disconnect differentiation

This complements the accidental disconnect handling which uses grace period.

.devcontainer/docker/devcontainer.json

@@ -1,5 +1,5 @@
 {
-	"name": "JetKVM",
+	"name": "JetKVM docker devcontainer",
 	"image": "mcr.microsoft.com/devcontainers/go:1.25-trixie",
 	"features": {
 		"ghcr.io/devcontainers/features/node:1": {

.devcontainer/install-deps.sh

@@ -32,4 +32,5 @@ wget https://github.com/jetkvm/rv1106-system/releases/download/${BUILDKIT_VERSIO
     sudo mkdir -p /opt/jetkvm-native-buildkit && \
     sudo tar --use-compress-program="unzstd --long=31" -xvf buildkit.tar.zst -C /opt/jetkvm-native-buildkit && \
     rm buildkit.tar.zst
-popd
+popd
+rm -rf "${BUILDKIT_TMPDIR}"

.devcontainer/podman/devcontainer.json

@@ -0,0 +1,19 @@
+{
+	"name": "JetKVM podman devcontainer",
+	"image": "mcr.microsoft.com/devcontainers/go:1.25-trixie",
+	"features": {
+		"ghcr.io/devcontainers/features/node:1": {
+			// Should match what is defined in ui/package.json
+			"version": "22.19.0"
+		}
+	},
+	"runArgs": [
+		"--userns=keep-id",
+		"--security-opt=label=disable",
+		"--security-opt=label=nested"
+	],
+	"containerUser": "vscode",
+	"containerEnv": {
+		"HOME": "/home/vscode"
+	}
+}

cloud.go

@@ -512,7 +512,12 @@ func handleSessionRequest(
 		_ = wsjson.Write(context.Background(), c, gin.H{"error": "session manager not initialized"})
 		return fmt.Errorf("session manager not initialized")
 	}
+	scopedLogger.Debug().Msg("About to call AddSession")
 	err = sessionManager.AddSession(session, req.SessionSettings)
+	scopedLogger.Debug().
+		Bool("addSessionSucceeded", err == nil).
+		Str("error", fmt.Sprintf("%v", err)).
+		Msg("AddSession returned")
 	if err != nil {
 		scopedLogger.Warn().Err(err).Msg("failed to add session to session manager")
 		if err == ErrMaxSessionsReached {
@@ -522,6 +527,7 @@ func handleSessionRequest(
 		}
 		return err
 	}
+	scopedLogger.Debug().Msg("AddSession completed successfully, continuing")
 
 	if session.HasPermission(PermissionPaste) {
 		cancelKeyboardMacro()

session_manager.go

@@ -126,8 +126,13 @@ func NewSessionManager(logger *zerolog.Logger) *SessionManager {
 }
 
 func (sm *SessionManager) AddSession(session *Session, clientSettings *SessionSettings) error {
+	sm.logger.Debug().
+		Str("sessionID", session.ID).
+		Msg("AddSession ENTRY")
+
 	// Basic input validation
 	if session == nil {
+		sm.logger.Error().Msg("AddSession: session is nil")
 		return errors.New("session cannot be nil")
 	}
 	// Validate nickname if provided (matching frontend validation)
@@ -163,6 +168,10 @@ func (sm *SessionManager) AddSession(session *Session, clientSettings *SessionSe
 
 	// Check if a session with this ID already exists (reconnection)
 	if existing, exists := sm.sessions[session.ID]; exists {
+		sm.logger.Debug().
+			Str("sessionID", session.ID).
+			Msg("AddSession: session ID already exists - RECONNECTION PATH")
+
 		// SECURITY: Verify identity matches to prevent session hijacking
 		if existing.Identity != session.Identity || existing.Source != session.Source {
 			return fmt.Errorf("session ID already in use by different user (identity mismatch)")
@@ -220,11 +229,18 @@ func (sm *SessionManager) AddSession(session *Session, clientSettings *SessionSe
 		// NOTE: Skip validation during reconnection to preserve grace period
 		// validateSinglePrimary() would clear primary slot during reconnection window
 
+		sm.logger.Debug().
+			Str("sessionID", session.ID).
+			Msg("AddSession: RETURNING from reconnection path")
 		go sm.broadcastSessionListUpdate()
 		return nil
 	}
 
 	if len(sm.sessions) >= sm.maxSessions {
+		sm.logger.Warn().
+			Int("currentSessions", len(sm.sessions)).
+			Int("maxSessions", sm.maxSessions).
+			Msg("AddSession: MAX SESSIONS REACHED")
 		return ErrMaxSessionsReached
 	}
 
@@ -412,60 +428,101 @@ func (sm *SessionManager) RemoveSession(sessionID string) {
 	// Remove from queue if present
 	sm.removeFromQueue(sessionID)
 
-	// Add a grace period for reconnection for all sessions
-	// Use configured grace period or default to 10 seconds
+	// Check if this session was marked for immediate removal (intentional logout)
+	isIntentionalLogout := false
+	if graceTime, exists := sm.reconnectGrace[sessionID]; exists {
+		// If grace period is already expired, this was intentional logout
+		if time.Now().After(graceTime) {
+			isIntentionalLogout = true
+			sm.logger.Info().
+				Str("sessionID", sessionID).
+				Msg("Detected intentional logout - skipping grace period")
+			delete(sm.reconnectGrace, sessionID)
+			delete(sm.reconnectInfo, sessionID)
+		}
+	}
+
+	// Determine grace period duration (used for logging even if intentional logout)
 	gracePeriod := 10
 	if currentSessionSettings != nil && currentSessionSettings.ReconnectGrace > 0 {
 		gracePeriod = currentSessionSettings.ReconnectGrace
 	}
 
-	// Limit grace period entries to prevent memory exhaustion (DoS protection)
-	const maxGraceEntries = 10 // Reduced from 20 to limit memory usage
-	for len(sm.reconnectGrace) >= maxGraceEntries {
-		// Find and remove the oldest grace period entry
-		var oldestID string
-		var oldestTime time.Time
-		for id, graceTime := range sm.reconnectGrace {
-			if oldestTime.IsZero() || graceTime.Before(oldestTime) {
-				oldestID = id
-				oldestTime = graceTime
+	// Only add grace period if this is NOT an intentional logout
+	if !isIntentionalLogout {
+		// Add a grace period for reconnection for all sessions
+
+		// Limit grace period entries to prevent memory exhaustion (DoS protection)
+		const maxGraceEntries = 10 // Reduced from 20 to limit memory usage
+		for len(sm.reconnectGrace) >= maxGraceEntries {
+			// Find and remove the oldest grace period entry
+			var oldestID string
+			var oldestTime time.Time
+			for id, graceTime := range sm.reconnectGrace {
+				if oldestTime.IsZero() || graceTime.Before(oldestTime) {
+					oldestID = id
+					oldestTime = graceTime
+				}
+			}
+			if oldestID != "" {
+				delete(sm.reconnectGrace, oldestID)
+				delete(sm.reconnectInfo, oldestID)
+			} else {
+				break // Safety check to prevent infinite loop
 			}
 		}
-		if oldestID != "" {
-			delete(sm.reconnectGrace, oldestID)
-			delete(sm.reconnectInfo, oldestID)
-		} else {
-			break // Safety check to prevent infinite loop
+
+		sm.reconnectGrace[sessionID] = time.Now().Add(time.Duration(gracePeriod) * time.Second)
+
+		// Store session info for potential reconnection
+		sm.reconnectInfo[sessionID] = &SessionData{
+			ID:        session.ID,
+			Mode:      session.Mode,
+			Source:    session.Source,
+			Identity:  session.Identity,
+			Nickname:  session.Nickname,
+			CreatedAt: session.CreatedAt,
 		}
 	}
 
-	sm.reconnectGrace[sessionID] = time.Now().Add(time.Duration(gracePeriod) * time.Second)
-
-	// Store session info for potential reconnection
-	sm.reconnectInfo[sessionID] = &SessionData{
-		ID:        session.ID,
-		Mode:      session.Mode,
-		Source:    session.Source,
-		Identity:  session.Identity,
-		Nickname:  session.Nickname,
-		CreatedAt: session.CreatedAt,
-	}
-
 	// If this was the primary session, clear primary slot and track for grace period
 	if wasPrimary {
-		sm.lastPrimaryID = sessionID // Remember this was the primary for grace period
-		sm.primarySessionID = ""     // Clear primary slot so other sessions can be promoted
-		sm.logger.Info().
-			Str("sessionID", sessionID).
-			Dur("gracePeriod", time.Duration(gracePeriod)*time.Second).
-			Int("remainingSessions", len(sm.sessions)).
-			Msg("Primary session removed, grace period active")
+		if isIntentionalLogout {
+			// Intentional logout: clear immediately and promote right away
+			sm.primarySessionID = ""
+			sm.lastPrimaryID = ""
+			sm.logger.Info().
+				Str("sessionID", sessionID).
+				Int("remainingSessions", len(sm.sessions)).
+				Msg("Primary session removed via intentional logout - immediate promotion")
+		} else {
+			// Accidental disconnect: use grace period
+			sm.lastPrimaryID = sessionID // Remember this was the primary for grace period
+			sm.primarySessionID = ""     // Clear primary slot so other sessions can be promoted
 
-		// Immediate promotion check: if there are observers waiting, trigger validation
-		// This allows immediate promotion while still respecting grace period protection
+			// Clear all blacklists to allow emergency promotion after grace period expires
+			// The blacklist is meant to prevent immediate re-promotion during manual transfers,
+			// but should not block emergency promotion after accidental disconnects
+			if len(sm.transferBlacklist) > 0 {
+				sm.logger.Info().
+					Int("clearedBlacklistEntries", len(sm.transferBlacklist)).
+					Str("disconnectedPrimaryID", sessionID).
+					Msg("Clearing transfer blacklist to allow grace period promotion")
+				sm.transferBlacklist = make([]TransferBlacklistEntry, 0)
+			}
+
+			sm.logger.Info().
+				Str("sessionID", sessionID).
+				Dur("gracePeriod", time.Duration(gracePeriod)*time.Second).
+				Int("remainingSessions", len(sm.sessions)).
+				Msg("Primary session removed, grace period active")
+		}
+
+		// Trigger validation for potential promotion
 		if len(sm.sessions) > 0 {
 			sm.logger.Debug().
 				Str("removedPrimaryID", sessionID).
+				Bool("intentionalLogout", isIntentionalLogout).
 				Int("remainingSessions", len(sm.sessions)).
 				Msg("Triggering immediate validation for potential promotion")
 			sm.validateSinglePrimary()
@@ -509,6 +566,28 @@ func (sm *SessionManager) IsInGracePeriod(sessionID string) bool {
 	return false
 }
 
+// ClearGracePeriod removes the grace period for a session (for intentional logout/disconnect)
+// This marks the session for immediate removal without grace period protection
+// Actual promotion will happen in RemoveSession when it detects no grace period
+func (sm *SessionManager) ClearGracePeriod(sessionID string) {
+	sm.mu.Lock()
+	defer sm.mu.Unlock()
+
+	// Clear grace period and reconnect info to prevent grace period from being added
+	delete(sm.reconnectGrace, sessionID)
+	delete(sm.reconnectInfo, sessionID)
+
+	// Mark this session with a special "immediate removal" grace period (already expired)
+	// This signals to RemoveSession that this was intentional and should skip grace period
+	sm.reconnectGrace[sessionID] = time.Now().Add(-1 * time.Second) // Already expired
+
+	sm.logger.Info().
+		Str("sessionID", sessionID).
+		Str("lastPrimaryID", sm.lastPrimaryID).
+		Str("primarySessionID", sm.primarySessionID).
+		Msg("Marked session for immediate removal (intentional logout)")
+}
+
 // isSessionBlacklisted checks if a session was recently demoted via transfer and should not become primary
 func (sm *SessionManager) isSessionBlacklisted(sessionID string) bool {
 	now := time.Now()
@@ -1293,6 +1372,7 @@ func (sm *SessionManager) findMostTrustedSessionForEmergency() string {
 	bestSessionID := ""
 	bestScore := -1
 
+	// First pass: try to find observers or queued sessions (preferred)
 	for sessionID, session := range sm.sessions {
 		// Skip if blacklisted, primary, or not eligible modes
 		if sm.isSessionBlacklisted(sessionID) ||
@@ -1308,6 +1388,23 @@ func (sm *SessionManager) findMostTrustedSessionForEmergency() string {
 		}
 	}
 
+	// If no observers/queued found, try pending sessions as last resort
+	if bestSessionID == "" {
+		for sessionID, session := range sm.sessions {
+			if sm.isSessionBlacklisted(sessionID) || session.Mode == SessionModePrimary {
+				continue
+			}
+
+			if session.Mode == SessionModePending {
+				score := sm.getSessionTrustScore(sessionID)
+				if score > bestScore {
+					bestScore = score
+					bestSessionID = sessionID
+				}
+			}
+		}
+	}
+
 	// Log the selection decision for audit trail
 	if bestSessionID != "" {
 		sm.logger.Info().
@@ -1504,9 +1601,11 @@ func (sm *SessionManager) cleanupInactiveSessions(ctx context.Context) {
 			needsBroadcast := false
 
 			// Check for expired grace periods and promote if needed
+			gracePeriodExpired := false
 			for sessionID, graceTime := range sm.reconnectGrace {
 				if now.After(graceTime) {
 					delete(sm.reconnectGrace, sessionID)
+					gracePeriodExpired = true
 
 					wasHoldingPrimarySlot := (sm.lastPrimaryID == sessionID)
 
@@ -1719,12 +1818,18 @@ func (sm *SessionManager) cleanupInactiveSessions(ctx context.Context) {
 				}
 			}
 
-			// Periodic validateSinglePrimary to catch deadlock states
-			validationCounter++
-			if validationCounter >= 10 { // Every 10 seconds
-				validationCounter = 0
-				sm.logger.Debug().Msg("Running periodic session validation to catch deadlock states")
+			// Run validation immediately if a grace period expired, otherwise run periodically
+			if gracePeriodExpired {
+				sm.logger.Debug().Msg("Running immediate validation after grace period expiration")
 				sm.validateSinglePrimary()
+			} else {
+				// Periodic validateSinglePrimary to catch deadlock states
+				validationCounter++
+				if validationCounter >= 10 { // Every 10 seconds
+					validationCounter = 0
+					sm.logger.Debug().Msg("Running periodic session validation to catch deadlock states")
+					sm.validateSinglePrimary()
+				}
 			}
 
 			sm.mu.Unlock()

ui/src/components/ActionBar.tsx

@@ -93,7 +93,7 @@ export default function Actionbar({
         className="flex flex-wrap items-center justify-between gap-x-4 gap-y-2 py-1.5"
       >
         <div className="relative flex flex-wrap items-center gap-x-2 gap-y-2">
-          {developerMode && (
+          {developerMode && hasPermission(Permission.TERMINAL_ACCESS) && (
             <Button
               size="XS"
               theme="light"

ui/src/routes/devices.$id.mount.tsx

@@ -374,8 +374,8 @@ function UrlView({
       icon: FedoraIcon,
     },
     {
-      name: "openSUSE Leap 15.6",
-      url: "https://download.opensuse.org/distribution/leap/15.6/iso/openSUSE-Leap-15.6-NET-x86_64-Media.iso",
+      name: "openSUSE Leap 16.0",
+      url: "https://download.opensuse.org/distribution/leap/16.0/offline/Leap-16.0-online-installer-x86_64.install.iso",
       icon: OpenSUSEIcon,
     },
     {

web.go

@@ -357,6 +357,13 @@ func handleWebRTCSignalWsMessages(
 		typ, msg, err := wsCon.Read(runCtx)
 		if err != nil {
 			l.Warn().Str("error", err.Error()).Msg("websocket read error")
+			// Clean up session when websocket closes
+			if session := sessionManager.GetSession(connectionID); session != nil && session.peerConnection != nil {
+				l.Info().
+					Str("sessionID", session.ID).
+					Msg("Closing peer connection due to websocket error")
+				_ = session.peerConnection.Close()
+			}
 			return err
 		}
 		if typ != websocket.MessageText {
@@ -481,10 +488,30 @@ func handleLogin(c *gin.Context) {
 }
 
 func handleLogout(c *gin.Context) {
-	// Only clear the cookies for this session, don't invalidate the token
+	// Get session ID from cookie before clearing
+	sessionID, _ := c.Cookie("sessionId")
+
+	// Close the WebRTC session immediately for intentional logout
+	if sessionID != "" {
+		if session := sessionManager.GetSession(sessionID); session != nil {
+			websocketLogger.Info().
+				Str("sessionID", sessionID).
+				Msg("Closing session due to intentional logout - no grace period")
+
+			// Close peer connection (will trigger cleanupSession)
+			if session.peerConnection != nil {
+				_ = session.peerConnection.Close()
+			}
+
+			// Clear grace period for intentional logout - observer should be promoted immediately
+			sessionManager.ClearGracePeriod(sessionID)
+		}
+	}
+
+	// Clear the cookies for this session, don't invalidate the token
 	// The token should remain valid for other sessions
 	c.SetCookie("authToken", "", -1, "/", "", false, true)
-	c.SetCookie("sessionId", "", -1, "/", "", false, true) // Clear session ID cookie too
+	c.SetCookie("sessionId", "", -1, "/", "", false, true)
 	c.JSON(http.StatusOK, gin.H{"message": "Logout successful"})
 }
 

webrtc.go

@@ -68,7 +68,7 @@ type Session struct {
 // CheckRPCRateLimit checks if the session has exceeded RPC rate limits (DoS protection)
 func (s *Session) CheckRPCRateLimit() bool {
 	const (
-		maxRPCPerSecond = 20
+		maxRPCPerSecond = 100 // Increased from 20 to accommodate multi-session polling and reconnections
 		rateLimitWindow = time.Second
 	)