network enhanecment / refactor (#361)

* chore(network): improve connectivity check

* refactor(network): rewrite network and timesync component

* feat(display): show cloud connection status

* chore: change logging verbosity

* chore(websecure): update log message

* fix(ota): validate root certificate when downloading update

* feat(ui): add network settings tab

* fix(display): cloud connecting animation

* fix: golintci issues

* feat: add network settings tab

* feat(timesync): query servers in parallel

* refactor(network): move to internal/network package

* feat(timesync): add metrics

* refactor(log): move log to internal/logging package

* refactor(mdms): move mdns to internal/mdns package

* feat(developer): add pprof endpoint

* feat(logging): add a simple logging streaming endpoint

* fix(mdns): do not start mdns until network is up

* feat(network): allow users to update network settings from ui

* fix(network): handle errors when net.IPAddr is nil

* fix(mdns): scopedLogger SIGSEGV

* fix(dhcp): watch directory instead of file to catch fsnotify.Create event

* refactor(nbd): move platform-specific code to different files

* refactor(native): move platform-specific code to different files

* chore: fix linter issues

* chore(dev_deploy): allow to override PION_LOG_TRACE

block_device.go

@@ -7,7 +7,6 @@ import (
 	"os"
 	"time"
 
-	"github.com/pojntfx/go-nbd/pkg/client"
 	"github.com/pojntfx/go-nbd/pkg/server"
 	"github.com/rs/zerolog"
 )
@@ -149,30 +148,3 @@ func (d *NBDDevice) runServerConn() {
 
 	d.l.Info().Err(err).Msg("nbd server exited")
 }
-
-func (d *NBDDevice) runClientConn() {
-	err := client.Connect(d.clientConn, d.dev, &client.Options{
-		ExportName: "jetkvm",
-		BlockSize:  uint32(4 * 1024),
-	})
-	d.l.Info().Err(err).Msg("nbd client exited")
-}
-
-func (d *NBDDevice) Close() {
-	if d.dev != nil {
-		err := client.Disconnect(d.dev)
-		if err != nil {
-			d.l.Warn().Err(err).Msg("error disconnecting nbd client")
-		}
-		_ = d.dev.Close()
-	}
-	if d.listener != nil {
-		_ = d.listener.Close()
-	}
-	if d.clientConn != nil {
-		_ = d.clientConn.Close()
-	}
-	if d.serverConn != nil {
-		_ = d.serverConn.Close()
-	}
-}

block_device_linux.go

@@ -0,0 +1,34 @@
+//go:build linux
+
+package kvm
+
+import (
+	"github.com/pojntfx/go-nbd/pkg/client"
+)
+
+func (d *NBDDevice) runClientConn() {
+	err := client.Connect(d.clientConn, d.dev, &client.Options{
+		ExportName: "jetkvm",
+		BlockSize:  uint32(4 * 1024),
+	})
+	d.l.Info().Err(err).Msg("nbd client exited")
+}
+
+func (d *NBDDevice) Close() {
+	if d.dev != nil {
+		err := client.Disconnect(d.dev)
+		if err != nil {
+			d.l.Warn().Err(err).Msg("error disconnecting nbd client")
+		}
+		_ = d.dev.Close()
+	}
+	if d.listener != nil {
+		_ = d.listener.Close()
+	}
+	if d.clientConn != nil {
+		_ = d.clientConn.Close()
+	}
+	if d.serverConn != nil {
+		_ = d.serverConn.Close()
+	}
+}

block_device_notlinux.go

@@ -0,0 +1,17 @@
+//go:build !linux
+
+package kvm
+
+import (
+	"os"
+)
+
+func (d *NBDDevice) runClientConn() {
+	d.l.Error().Msg("platform not supported")
+	os.Exit(1)
+}
+
+func (d *NBDDevice) Close() {
+	d.l.Error().Msg("platform not supported")
+	os.Exit(1)
+}

cloud.go

@@ -139,11 +139,40 @@ var (
 	)
 )
 
+type CloudConnectionState uint8
+
+const (
+	CloudConnectionStateNotConfigured CloudConnectionState = iota
+	CloudConnectionStateDisconnected
+	CloudConnectionStateConnecting
+	CloudConnectionStateConnected
+)
+
 var (
+	cloudConnectionState     CloudConnectionState = CloudConnectionStateNotConfigured
+	cloudConnectionStateLock                      = &sync.Mutex{}
+
 	cloudDisconnectChan chan error
 	cloudDisconnectLock = &sync.Mutex{}
 )
 
+func setCloudConnectionState(state CloudConnectionState) {
+	cloudConnectionStateLock.Lock()
+	defer cloudConnectionStateLock.Unlock()
+
+	if cloudConnectionState == CloudConnectionStateDisconnected &&
+		(config.CloudToken == "" || config.CloudURL == "") {
+		state = CloudConnectionStateNotConfigured
+	}
+
+	previousState := cloudConnectionState
+	cloudConnectionState = state
+
+	go waitCtrlAndRequestDisplayUpdate(
+		previousState != state,
+	)
+}
+
 func wsResetMetrics(established bool, sourceType string, source string) {
 	metricConnectionLastPingTimestamp.WithLabelValues(sourceType, source).Set(-1)
 	metricConnectionLastPingDuration.WithLabelValues(sourceType, source).Set(-1)
@@ -285,6 +314,8 @@ func runWebsocketClient() error {
 		wsURL.Scheme = "wss"
 	}
 
+	setCloudConnectionState(CloudConnectionStateConnecting)
+
 	header := http.Header{}
 	header.Set("X-Device-ID", GetDeviceID())
 	header.Set("X-App-Version", builtAppVersion)
@@ -302,20 +333,26 @@ func runWebsocketClient() error {
 	c, resp, err := websocket.Dial(dialCtx, wsURL.String(), &websocket.DialOptions{
 		HTTPHeader: header,
 		OnPingReceived: func(ctx context.Context, payload []byte) bool {
-			scopedLogger.Info().Bytes("payload", payload).Int("length", len(payload)).Msg("ping frame received")
+			scopedLogger.Debug().Bytes("payload", payload).Int("length", len(payload)).Msg("ping frame received")
 
 			metricConnectionTotalPingReceivedCount.WithLabelValues("cloud", wsURL.Host).Inc()
 			metricConnectionLastPingReceivedTimestamp.WithLabelValues("cloud", wsURL.Host).SetToCurrentTime()
 
+			setCloudConnectionState(CloudConnectionStateConnected)
+
 			return true
 		},
 	})
 
+	var connectionId string
+	if resp != nil {
 		// get the request id from the response header
-	connectionId := resp.Header.Get("X-Request-ID")
+		connectionId = resp.Header.Get("X-Request-ID")
 		if connectionId == "" {
 			connectionId = resp.Header.Get("Cf-Ray")
 		}
+	}
+
 	if connectionId == "" {
 		connectionId = uuid.New().String()
 		scopedLogger.Warn().
@@ -332,6 +369,8 @@ func runWebsocketClient() error {
 	if err != nil {
 		if errors.Is(err, context.Canceled) {
 			cloudLogger.Info().Msg("websocket connection canceled")
+			setCloudConnectionState(CloudConnectionStateDisconnected)
+
 			return nil
 		}
 		return err
@@ -450,14 +489,14 @@ func RunWebsocketClient() {
 		}
 
 		// If the network is not up, well, we can't connect to the cloud.
-		if !networkState.Up {
+		if !networkState.IsOnline() {
-			cloudLogger.Warn().Msg("waiting for network to be up, will retry in 3 seconds")
+			cloudLogger.Warn().Msg("waiting for network to be online, will retry in 3 seconds")
 			time.Sleep(3 * time.Second)
 			continue
 		}
 
 		// If the system time is not synchronized, the API request will fail anyway because the TLS handshake will fail.
-		if isTimeSyncNeeded() && !timeSyncSuccess {
+		if isTimeSyncNeeded() && !timeSync.IsSyncSuccess() {
 			cloudLogger.Warn().Msg("system time is not synced, will retry in 3 seconds")
 			time.Sleep(3 * time.Second)
 			continue
@@ -520,6 +559,8 @@ func rpcDeregisterDevice() error {
 		cloudLogger.Info().Msg("device deregistered, disconnecting from cloud")
 		disconnectCloud(fmt.Errorf("device deregistered"))
 
+		setCloudConnectionState(CloudConnectionStateNotConfigured)
+
 		return nil
 	}
 

config.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"sync"
 
+	"github.com/jetkvm/kvm/internal/logging"
+	"github.com/jetkvm/kvm/internal/network"
 	"github.com/jetkvm/kvm/internal/usbgadget"
 )
 
@@ -93,6 +95,7 @@ type Config struct {
 	TLSMode              string                 `json:"tls_mode"` // options: "self-signed", "user-defined", ""
 	UsbConfig            *usbgadget.Config      `json:"usb_config"`
 	UsbDevices           *usbgadget.Devices     `json:"usb_devices"`
+	NetworkConfig        *network.NetworkConfig `json:"network_config"`
 	DefaultLogLevel      string                 `json:"default_log_level"`
 }
 
@@ -121,6 +124,7 @@ var defaultConfig = &Config{
 		Keyboard:      true,
 		MassStorage:   true,
 	},
+	NetworkConfig:   &network.NetworkConfig{},
 	DefaultLogLevel: "INFO",
 }
 
@@ -134,7 +138,7 @@ func LoadConfig() {
 	defer configLock.Unlock()
 
 	if config != nil {
-		logger.Info().Msg("config already loaded, skipping")
+		logger.Debug().Msg("config already loaded, skipping")
 		return
 	}
 
@@ -164,9 +168,15 @@ func LoadConfig() {
 		loadedConfig.UsbDevices = defaultConfig.UsbDevices
 	}
 
+	if loadedConfig.NetworkConfig == nil {
+		loadedConfig.NetworkConfig = defaultConfig.NetworkConfig
+	}
+
 	config = &loadedConfig
 
-	rootLogger.UpdateLogLevel()
+	logging.GetRootLogger().UpdateLogLevel(config.DefaultLogLevel)
+
+	logger.Info().Str("path", configPath).Msg("config loaded")
 }
 
 func SaveConfig() error {

dev_deploy.sh

@@ -24,6 +24,7 @@ show_help() {
 REMOTE_USER="root"
 REMOTE_PATH="/userdata/jetkvm/bin"
 SKIP_UI_BUILD=false
+LOG_TRACE_SCOPES="${LOG_TRACE_SCOPES:-jetkvm,cloud,websocket,native,jsonrpc}"
 
 # Parse command line arguments
 while [[ $# -gt 0 ]]; do
@@ -91,7 +92,7 @@ cd "${REMOTE_PATH}"
 chmod +x jetkvm_app_debug
 
 # Run the application in the background
-PION_LOG_TRACE=jetkvm,cloud,websocket ./jetkvm_app_debug
+PION_LOG_TRACE=${LOG_TRACE_SCOPES} ./jetkvm_app_debug
 EOF
 
 echo "Deployment complete."

display.go

@@ -33,50 +33,153 @@ func switchToScreen(screen string) {
 
 var displayedTexts = make(map[string]string)
 
+func lvObjSetState(objName string, state string) (*CtrlResponse, error) {
+	return CallCtrlAction("lv_obj_set_state", map[string]interface{}{"obj": objName, "state": state})
+}
+
+func lvObjAddFlag(objName string, flag string) (*CtrlResponse, error) {
+	return CallCtrlAction("lv_obj_add_flag", map[string]interface{}{"obj": objName, "flag": flag})
+}
+
+func lvObjClearFlag(objName string, flag string) (*CtrlResponse, error) {
+	return CallCtrlAction("lv_obj_clear_flag", map[string]interface{}{"obj": objName, "flag": flag})
+}
+
+func lvObjHide(objName string) (*CtrlResponse, error) {
+	return lvObjAddFlag(objName, "LV_OBJ_FLAG_HIDDEN")
+}
+
+func lvObjShow(objName string) (*CtrlResponse, error) {
+	return lvObjClearFlag(objName, "LV_OBJ_FLAG_HIDDEN")
+}
+
+func lvObjSetOpacity(objName string, opacity int) (*CtrlResponse, error) { // nolint:unused
+	return CallCtrlAction("lv_obj_set_style_opa_layered", map[string]interface{}{"obj": objName, "opa": opacity})
+}
+
+func lvObjFadeIn(objName string, duration uint32) (*CtrlResponse, error) {
+	return CallCtrlAction("lv_obj_fade_in", map[string]interface{}{"obj": objName, "time": duration})
+}
+
+func lvObjFadeOut(objName string, duration uint32) (*CtrlResponse, error) {
+	return CallCtrlAction("lv_obj_fade_out", map[string]interface{}{"obj": objName, "time": duration})
+}
+
+func lvLabelSetText(objName string, text string) (*CtrlResponse, error) {
+	return CallCtrlAction("lv_label_set_text", map[string]interface{}{"obj": objName, "text": text})
+}
+
+func lvImgSetSrc(objName string, src string) (*CtrlResponse, error) {
+	return CallCtrlAction("lv_img_set_src", map[string]interface{}{"obj": objName, "src": src})
+}
+
 func updateLabelIfChanged(objName string, newText string) {
 	if newText != "" && newText != displayedTexts[objName] {
-		_, _ = CallCtrlAction("lv_label_set_text", map[string]interface{}{"obj": objName, "text": newText})
+		_, _ = lvLabelSetText(objName, newText)
 		displayedTexts[objName] = newText
 	}
 }
 
 func switchToScreenIfDifferent(screenName string) {
-	displayLogger.Info().Str("from", currentScreen).Str("to", screenName).Msg("switching screen")
 	if currentScreen != screenName {
+		displayLogger.Info().Str("from", currentScreen).Str("to", screenName).Msg("switching screen")
 		switchToScreen(screenName)
 	}
 }
 
+var (
+	cloudBlinkLock    sync.Mutex = sync.Mutex{}
+	cloudBlinkStopped bool
+	cloudBlinkTicker  *time.Ticker
+)
+
 func updateDisplay() {
-	updateLabelIfChanged("ui_Home_Content_Ip", networkState.IPv4)
+	updateLabelIfChanged("ui_Home_Content_Ip", networkState.IPv4String())
 	if usbState == "configured" {
 		updateLabelIfChanged("ui_Home_Footer_Usb_Status_Label", "Connected")
-		_, _ = CallCtrlAction("lv_obj_set_state", map[string]interface{}{"obj": "ui_Home_Footer_Usb_Status_Label", "state": "LV_STATE_DEFAULT"})
+		_, _ = lvObjSetState("ui_Home_Footer_Usb_Status_Label", "LV_STATE_DEFAULT")
 	} else {
 		updateLabelIfChanged("ui_Home_Footer_Usb_Status_Label", "Disconnected")
-		_, _ = CallCtrlAction("lv_obj_set_state", map[string]interface{}{"obj": "ui_Home_Footer_Usb_Status_Label", "state": "LV_STATE_USER_2"})
+		_, _ = lvObjSetState("ui_Home_Footer_Usb_Status_Label", "LV_STATE_USER_2")
 	}
 	if lastVideoState.Ready {
 		updateLabelIfChanged("ui_Home_Footer_Hdmi_Status_Label", "Connected")
-		_, _ = CallCtrlAction("lv_obj_set_state", map[string]interface{}{"obj": "ui_Home_Footer_Hdmi_Status_Label", "state": "LV_STATE_DEFAULT"})
+		_, _ = lvObjSetState("ui_Home_Footer_Hdmi_Status_Label", "LV_STATE_DEFAULT")
 	} else {
 		updateLabelIfChanged("ui_Home_Footer_Hdmi_Status_Label", "Disconnected")
-		_, _ = CallCtrlAction("lv_obj_set_state", map[string]interface{}{"obj": "ui_Home_Footer_Hdmi_Status_Label", "state": "LV_STATE_USER_2"})
+		_, _ = lvObjSetState("ui_Home_Footer_Hdmi_Status_Label", "LV_STATE_USER_2")
 	}
 	updateLabelIfChanged("ui_Home_Header_Cloud_Status_Label", fmt.Sprintf("%d active", actionSessions))
-	if networkState.Up {
+
+	if networkState.IsUp() {
 		switchToScreenIfDifferent("ui_Home_Screen")
 	} else {
 		switchToScreenIfDifferent("ui_No_Network_Screen")
 	}
+
+	if cloudConnectionState == CloudConnectionStateNotConfigured {
+		_, _ = lvObjHide("ui_Home_Header_Cloud_Status_Icon")
+	} else {
+		_, _ = lvObjShow("ui_Home_Header_Cloud_Status_Icon")
+	}
+
+	switch cloudConnectionState {
+	case CloudConnectionStateDisconnected:
+		_, _ = lvImgSetSrc("ui_Home_Header_Cloud_Status_Icon", "cloud_disconnected.png")
+		stopCloudBlink()
+	case CloudConnectionStateConnecting:
+		_, _ = lvImgSetSrc("ui_Home_Header_Cloud_Status_Icon", "cloud.png")
+		startCloudBlink()
+	case CloudConnectionStateConnected:
+		_, _ = lvImgSetSrc("ui_Home_Header_Cloud_Status_Icon", "cloud.png")
+		stopCloudBlink()
+	}
+}
+
+func startCloudBlink() {
+	if cloudBlinkTicker == nil {
+		cloudBlinkTicker = time.NewTicker(2 * time.Second)
+	} else {
+		// do nothing if the blink isn't stopped
+		if cloudBlinkStopped {
+			cloudBlinkLock.Lock()
+			defer cloudBlinkLock.Unlock()
+
+			cloudBlinkStopped = false
+			cloudBlinkTicker.Reset(2 * time.Second)
+		}
+	}
+
+	go func() {
+		for range cloudBlinkTicker.C {
+			if cloudConnectionState != CloudConnectionStateConnecting {
+				continue
+			}
+			_, _ = lvObjFadeOut("ui_Home_Header_Cloud_Status_Icon", 1000)
+			time.Sleep(1000 * time.Millisecond)
+			_, _ = lvObjFadeIn("ui_Home_Header_Cloud_Status_Icon", 1000)
+			time.Sleep(1000 * time.Millisecond)
+		}
+	}()
+}
+
+func stopCloudBlink() {
+	if cloudBlinkTicker != nil {
+		cloudBlinkTicker.Stop()
+	}
+
+	cloudBlinkLock.Lock()
+	defer cloudBlinkLock.Unlock()
+	cloudBlinkStopped = true
 }
 
 var (
 	displayInited     = false
 	displayUpdateLock = sync.Mutex{}
+	waitDisplayUpdate = sync.Mutex{}
 )
 
-func requestDisplayUpdate() {
+func requestDisplayUpdate(shouldWakeDisplay bool) {
 	displayUpdateLock.Lock()
 	defer displayUpdateLock.Unlock()
 
@@ -85,16 +188,26 @@ func requestDisplayUpdate() {
 		return
 	}
 	go func() {
+		if shouldWakeDisplay {
 			wakeDisplay(false)
-		displayLogger.Info().Msg("display updating")
+		}
+		displayLogger.Debug().Msg("display updating")
 		//TODO: only run once regardless how many pending updates
 		updateDisplay()
 	}()
 }
 
+func waitCtrlAndRequestDisplayUpdate(shouldWakeDisplay bool) {
+	waitDisplayUpdate.Lock()
+	defer waitDisplayUpdate.Unlock()
+
+	waitCtrlClientConnected()
+	requestDisplayUpdate(shouldWakeDisplay)
+}
+
 func updateStaticContents() {
 	//contents that never change
-	updateLabelIfChanged("ui_Home_Content_Mac", networkState.MAC)
+	updateLabelIfChanged("ui_Home_Content_Mac", networkState.MACString())
 	systemVersion, appVersion, err := GetLocalVersion()
 	if err == nil {
 		updateLabelIfChanged("ui_About_Content_Operating_System_Version_ContentLabel", systemVersion.String())
@@ -265,7 +378,7 @@ func init() {
 		displayLogger.Info().Msg("display inited")
 		startBacklightTickers()
 		wakeDisplay(true)
-		requestDisplayUpdate()
+		requestDisplayUpdate(true)
 	}()
 
 	go watchTsEvents()

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/coder/websocket v1.8.13
 	github.com/coreos/go-oidc/v3 v3.11.0
 	github.com/creack/pty v1.1.23
+	github.com/fsnotify/fsnotify v1.9.0
 	github.com/gin-contrib/logger v1.2.5
 	github.com/gin-gonic/gin v1.10.0
 	github.com/google/uuid v1.6.0
@@ -44,6 +45,7 @@ require (
 	github.com/go-playground/universal-translator v0.18.1 // indirect
 	github.com/go-playground/validator/v10 v10.26.0 // indirect
 	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/guregu/null/v6 v6.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/compress v1.17.11 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.10 // indirect

go.sum

@@ -28,6 +28,8 @@ github.com/creack/pty v1.1.23/go.mod h1:08sCNb52WyoAwi2QDyzUCTgcvVFhUzewun7wtTfv
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
+github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
 github.com/gabriel-vasile/mimetype v1.4.8 h1:FfZ3gj38NjllZIeJAmMhr+qKL8Wu+nOoI3GqacKw1NM=
 github.com/gabriel-vasile/mimetype v1.4.8/go.mod h1:ByKUIKGjh1ODkGM1asKUbQZOLGrPjydw3hYPU2YU9t8=
 github.com/gin-contrib/logger v1.2.5 h1:qVQI4omayQecuN4zX9ZZnsOq7w9J/ZLds3J/FMn8ypM=
@@ -54,6 +56,8 @@ github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeN
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/guregu/null/v6 v6.0.0 h1:N14VRS+4di81i1PXRiprbQJ9EM9gqBa0+KVMeS/QSjQ=
+github.com/guregu/null/v6 v6.0.0/go.mod h1:hrMIhIfrOZeLPZhROSn149tpw2gHkidAqxoXNyeX3iQ=
 github.com/gwatts/rootcerts v0.0.0-20240401182218-3ab9db955caf h1:JO6ISZIvEUitto5zjQ3/VEnDM5rPbqIFuOhS0U0ByeA=
 github.com/gwatts/rootcerts v0.0.0-20240401182218-3ab9db955caf/go.mod h1:5Kt9XkWvkGi2OHOq0QsGxebHmhCcqJ8KCbNg/a6+n+g=
 github.com/hanwen/go-fuse/v2 v2.5.1 h1:OQBE8zVemSocRxA4OaFJbjJ5hlpCmIWbGr7r0M4uoQQ=

hw.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"regexp"
+	"strings"
 	"sync"
 	"time"
 )
@@ -51,6 +52,15 @@ func GetDeviceID() string {
 	return deviceID
 }
 
+func GetDefaultHostname() string {
+	deviceId := GetDeviceID()
+	if deviceId == "unknown_device_id" {
+		return "jetkvm"
+	}
+
+	return fmt.Sprintf("jetkvm-%s", strings.ToLower(deviceId))
+}
+
 func runWatchdog() {
 	file, err := os.OpenFile("/dev/watchdog", os.O_WRONLY, 0)
 	if err != nil {

internal/confparser/confparser.go

@@ -0,0 +1,381 @@
+package confparser
+
+import (
+	"fmt"
+	"net"
+	"reflect"
+	"slices"
+	"strconv"
+	"strings"
+
+	"github.com/guregu/null/v6"
+	"golang.org/x/net/idna"
+)
+
+type FieldConfig struct {
+	Name              string
+	Required          bool
+	RequiredIf        map[string]interface{}
+	OneOf             []string
+	ValidateTypes     []string
+	Defaults          interface{}
+	IsEmpty           bool
+	CurrentValue      interface{}
+	TypeString        string
+	Delegated         bool
+	shouldUpdateValue bool
+}
+
+func SetDefaultsAndValidate(config interface{}) error {
+	return setDefaultsAndValidate(config, true)
+}
+
+func setDefaultsAndValidate(config interface{}, isRoot bool) error {
+	// first we need to check if the config is a pointer
+	if reflect.TypeOf(config).Kind() != reflect.Ptr {
+		return fmt.Errorf("config is not a pointer")
+	}
+
+	// now iterate over the lease struct and set the values
+	configType := reflect.TypeOf(config).Elem()
+	configValue := reflect.ValueOf(config).Elem()
+
+	fields := make(map[string]FieldConfig)
+
+	for i := 0; i < configType.NumField(); i++ {
+		field := configType.Field(i)
+		fieldValue := configValue.Field(i)
+
+		defaultValue := field.Tag.Get("default")
+
+		fieldType := field.Type.String()
+
+		fieldConfig := FieldConfig{
+			Name:          field.Name,
+			OneOf:         splitString(field.Tag.Get("one_of")),
+			ValidateTypes: splitString(field.Tag.Get("validate_type")),
+			RequiredIf:    make(map[string]interface{}),
+			CurrentValue:  fieldValue.Interface(),
+			IsEmpty:       false,
+			TypeString:    fieldType,
+		}
+
+		// check if the field is required
+		required := field.Tag.Get("required")
+		if required != "" {
+			requiredBool, _ := strconv.ParseBool(required)
+			fieldConfig.Required = requiredBool
+		}
+
+		var canUseOneOff = false
+
+		// use switch to get the type
+		switch fieldValue.Interface().(type) {
+		case string, null.String:
+			if defaultValue != "" {
+				fieldConfig.Defaults = defaultValue
+			}
+			canUseOneOff = true
+		case []string:
+			if defaultValue != "" {
+				fieldConfig.Defaults = strings.Split(defaultValue, ",")
+			}
+			canUseOneOff = true
+		case int, null.Int:
+			if defaultValue != "" {
+				defaultValueInt, err := strconv.Atoi(defaultValue)
+				if err != nil {
+					return fmt.Errorf("invalid default value for field `%s`: %s", field.Name, defaultValue)
+				}
+
+				fieldConfig.Defaults = defaultValueInt
+			}
+		case bool, null.Bool:
+			if defaultValue != "" {
+				defaultValueBool, err := strconv.ParseBool(defaultValue)
+				if err != nil {
+					return fmt.Errorf("invalid default value for field `%s`: %s", field.Name, defaultValue)
+				}
+
+				fieldConfig.Defaults = defaultValueBool
+			}
+		default:
+			if defaultValue != "" {
+				return fmt.Errorf("field `%s` cannot use default value: unsupported type: %s", field.Name, fieldType)
+			}
+
+			// check if it's a pointer
+			if fieldValue.Kind() == reflect.Ptr {
+				// check if the pointer is nil
+				if fieldValue.IsNil() {
+					fieldConfig.IsEmpty = true
+				} else {
+					fieldConfig.CurrentValue = fieldValue.Elem().Addr()
+					fieldConfig.Delegated = true
+				}
+			} else {
+				fieldConfig.Delegated = true
+			}
+		}
+
+		// now check if the field is nullable interface
+		switch fieldValue.Interface().(type) {
+		case null.String:
+			if fieldValue.Interface().(null.String).IsZero() {
+				fieldConfig.IsEmpty = true
+			}
+		case null.Int:
+			if fieldValue.Interface().(null.Int).IsZero() {
+				fieldConfig.IsEmpty = true
+			}
+		case null.Bool:
+			if fieldValue.Interface().(null.Bool).IsZero() {
+				fieldConfig.IsEmpty = true
+			}
+		case []string:
+			if len(fieldValue.Interface().([]string)) == 0 {
+				fieldConfig.IsEmpty = true
+			}
+		}
+
+		// now check if the field has required_if
+		requiredIf := field.Tag.Get("required_if")
+		if requiredIf != "" {
+			requiredIfParts := strings.Split(requiredIf, ",")
+			for _, part := range requiredIfParts {
+				partVal := strings.SplitN(part, "=", 2)
+				if len(partVal) != 2 {
+					return fmt.Errorf("invalid required_if for field `%s`: %s", field.Name, requiredIf)
+				}
+
+				fieldConfig.RequiredIf[partVal[0]] = partVal[1]
+			}
+		}
+
+		// check if the field can use one_of
+		if !canUseOneOff && len(fieldConfig.OneOf) > 0 {
+			return fmt.Errorf("field `%s` cannot use one_of: unsupported type: %s", field.Name, fieldType)
+		}
+
+		fields[field.Name] = fieldConfig
+	}
+
+	if err := validateFields(config, fields); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func validateFields(config interface{}, fields map[string]FieldConfig) error {
+	// now we can start to validate the fields
+	for _, fieldConfig := range fields {
+		if err := fieldConfig.validate(fields); err != nil {
+			return err
+		}
+
+		fieldConfig.populate(config)
+	}
+
+	return nil
+}
+
+func (f *FieldConfig) validate(fields map[string]FieldConfig) error {
+	var required bool
+	var err error
+
+	if required, err = f.validateRequired(fields); err != nil {
+		return err
+	}
+
+	// check if the field needs to be updated and set defaults if needed
+	if err := f.checkIfFieldNeedsUpdate(); err != nil {
+		return err
+	}
+
+	// then we can check if the field is one_of
+	if err := f.validateOneOf(); err != nil {
+		return err
+	}
+
+	// and validate the type
+	if err := f.validateField(); err != nil {
+		return err
+	}
+
+	// if the field is delegated, we need to validate the nested field
+	// but before that, let's check if the field is required
+	if required && f.Delegated {
+		if err := setDefaultsAndValidate(f.CurrentValue.(reflect.Value).Interface(), false); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (f *FieldConfig) populate(config interface{}) {
+	// update the field if it's not empty
+	if !f.shouldUpdateValue {
+		return
+	}
+
+	reflect.ValueOf(config).Elem().FieldByName(f.Name).Set(reflect.ValueOf(f.CurrentValue))
+}
+
+func (f *FieldConfig) checkIfFieldNeedsUpdate() error {
+	// populate the field if it's empty and has a default value
+	if f.IsEmpty && f.Defaults != nil {
+		switch f.CurrentValue.(type) {
+		case null.String:
+			f.CurrentValue = null.StringFrom(f.Defaults.(string))
+		case null.Int:
+			f.CurrentValue = null.IntFrom(int64(f.Defaults.(int)))
+		case null.Bool:
+			f.CurrentValue = null.BoolFrom(f.Defaults.(bool))
+		case string:
+			f.CurrentValue = f.Defaults.(string)
+		case int:
+			f.CurrentValue = f.Defaults.(int)
+		case bool:
+			f.CurrentValue = f.Defaults.(bool)
+		case []string:
+			f.CurrentValue = f.Defaults.([]string)
+		default:
+			return fmt.Errorf("field `%s` cannot use default value: unsupported type: %s", f.Name, f.TypeString)
+		}
+
+		f.shouldUpdateValue = true
+	}
+
+	return nil
+}
+
+func (f *FieldConfig) validateRequired(fields map[string]FieldConfig) (bool, error) {
+	var required = f.Required
+
+	// if the field is not required, we need to check if it's required_if
+	if !required && len(f.RequiredIf) > 0 {
+		for key, value := range f.RequiredIf {
+			// check if the field's result matches the required_if
+			// right now we only support string and int
+			requiredField, ok := fields[key]
+			if !ok {
+				return required, fmt.Errorf("required_if field `%s` not found", key)
+			}
+
+			switch requiredField.CurrentValue.(type) {
+			case string:
+				if requiredField.CurrentValue.(string) == value.(string) {
+					required = true
+				}
+			case int:
+				if requiredField.CurrentValue.(int) == value.(int) {
+					required = true
+				}
+			case null.String:
+				if !requiredField.CurrentValue.(null.String).IsZero() &&
+					requiredField.CurrentValue.(null.String).String == value.(string) {
+					required = true
+				}
+			case null.Int:
+				if !requiredField.CurrentValue.(null.Int).IsZero() &&
+					requiredField.CurrentValue.(null.Int).Int64 == value.(int64) {
+					required = true
+				}
+			}
+
+			// if the field is required, we can break the loop
+			// because we only need one of the required_if fields to be true
+			if required {
+				break
+			}
+		}
+	}
+
+	if required && f.IsEmpty {
+		return false, fmt.Errorf("field `%s` is required", f.Name)
+	}
+
+	return required, nil
+}
+
+func checkIfSliceContains(slice []string, one_of []string) bool {
+	for _, oneOf := range one_of {
+		if slices.Contains(slice, oneOf) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (f *FieldConfig) validateOneOf() error {
+	if len(f.OneOf) == 0 {
+		return nil
+	}
+
+	var val []string
+	switch f.CurrentValue.(type) {
+	case string:
+		val = []string{f.CurrentValue.(string)}
+	case null.String:
+		val = []string{f.CurrentValue.(null.String).String}
+	case []string:
+		// let's validate the value here
+		val = f.CurrentValue.([]string)
+	default:
+		return fmt.Errorf("field `%s` cannot use one_of: unsupported type: %s", f.Name, f.TypeString)
+	}
+
+	if !checkIfSliceContains(val, f.OneOf) {
+		return fmt.Errorf(
+			"field `%s` is not one of the allowed values: %s, current value: %s",
+			f.Name,
+			strings.Join(f.OneOf, ", "),
+			strings.Join(val, ", "),
+		)
+	}
+
+	return nil
+}
+
+func (f *FieldConfig) validateField() error {
+	if len(f.ValidateTypes) == 0 || f.IsEmpty {
+		return nil
+	}
+
+	val, err := toString(f.CurrentValue)
+	if err != nil {
+		return fmt.Errorf("field `%s` cannot use validate_type: %s", f.Name, err)
+	}
+
+	if val == "" {
+		return nil
+	}
+
+	for _, validateType := range f.ValidateTypes {
+		switch validateType {
+		case "ipv4":
+			if net.ParseIP(val).To4() == nil {
+				return fmt.Errorf("field `%s` is not a valid IPv4 address: %s", f.Name, val)
+			}
+		case "ipv6":
+			if net.ParseIP(val).To16() == nil {
+				return fmt.Errorf("field `%s` is not a valid IPv6 address: %s", f.Name, val)
+			}
+		case "hwaddr":
+			if _, err := net.ParseMAC(val); err != nil {
+				return fmt.Errorf("field `%s` is not a valid MAC address: %s", f.Name, val)
+			}
+		case "hostname":
+			if _, err := idna.Lookup.ToASCII(val); err != nil {
+				return fmt.Errorf("field `%s` is not a valid hostname: %s", f.Name, val)
+			}
+		default:
+			return fmt.Errorf("field `%s` cannot use validate_type: unsupported validator: %s", f.Name, validateType)
+		}
+	}
+
+	return nil
+}

internal/confparser/confparser_test.go

@@ -0,0 +1,100 @@
+package confparser
+
+import (
+	"net"
+	"testing"
+	"time"
+
+	"github.com/guregu/null/v6"
+)
+
+type testIPv6Address struct { //nolint:unused
+	Address           net.IP     `json:"address"`
+	Prefix            net.IPNet  `json:"prefix"`
+	ValidLifetime     *time.Time `json:"valid_lifetime"`
+	PreferredLifetime *time.Time `json:"preferred_lifetime"`
+	Scope             int        `json:"scope"`
+}
+
+type testIPv4StaticConfig struct {
+	Address null.String `json:"address" validate_type:"ipv4" required:"true"`
+	Netmask null.String `json:"netmask" validate_type:"ipv4" required:"true"`
+	Gateway null.String `json:"gateway" validate_type:"ipv4" required:"true"`
+	DNS     []string    `json:"dns" validate_type:"ipv4" required:"true"`
+}
+
+type testIPv6StaticConfig struct {
+	Address null.String `json:"address" validate_type:"ipv6" required:"true"`
+	Prefix  null.String `json:"prefix" validate_type:"ipv6" required:"true"`
+	Gateway null.String `json:"gateway" validate_type:"ipv6" required:"true"`
+	DNS     []string    `json:"dns" validate_type:"ipv6" required:"true"`
+}
+type testNetworkConfig struct {
+	Hostname null.String `json:"hostname,omitempty"`
+	Domain   null.String `json:"domain,omitempty"`
+
+	IPv4Mode   null.String           `json:"ipv4_mode" one_of:"dhcp,static,disabled" default:"dhcp"`
+	IPv4Static *testIPv4StaticConfig `json:"ipv4_static,omitempty" required_if:"IPv4Mode=static"`
+
+	IPv6Mode   null.String           `json:"ipv6_mode" one_of:"slaac,dhcpv6,slaac_and_dhcpv6,static,link_local,disabled" default:"slaac"`
+	IPv6Static *testIPv6StaticConfig `json:"ipv6_static,omitempty" required_if:"IPv6Mode=static"`
+
+	LLDPMode                null.String `json:"lldp_mode,omitempty" one_of:"disabled,basic,all" default:"basic"`
+	LLDPTxTLVs              []string    `json:"lldp_tx_tlvs,omitempty" one_of:"chassis,port,system,vlan" default:"chassis,port,system,vlan"`
+	MDNSMode                null.String `json:"mdns_mode,omitempty" one_of:"disabled,auto,ipv4_only,ipv6_only" default:"auto"`
+	TimeSyncMode            null.String `json:"time_sync_mode,omitempty" one_of:"ntp_only,ntp_and_http,http_only,custom" default:"ntp_and_http"`
+	TimeSyncOrdering        []string    `json:"time_sync_ordering,omitempty" one_of:"http,ntp,ntp_dhcp,ntp_user_provided,ntp_fallback" default:"ntp,http"`
+	TimeSyncDisableFallback null.Bool   `json:"time_sync_disable_fallback,omitempty" default:"false"`
+	TimeSyncParallel        null.Int    `json:"time_sync_parallel,omitempty" default:"4"`
+}
+
+func TestValidateConfig(t *testing.T) {
+	config := &testNetworkConfig{}
+
+	err := SetDefaultsAndValidate(config)
+	if err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
+}
+
+func TestValidateIPv4StaticConfigRequired(t *testing.T) {
+	config := &testNetworkConfig{
+		IPv4Static: &testIPv4StaticConfig{
+			Address: null.StringFrom("192.168.1.1"),
+			Gateway: null.StringFrom("192.168.1.1"),
+		},
+	}
+
+	err := SetDefaultsAndValidate(config)
+	if err == nil {
+		t.Fatalf("expected error, got nil")
+	}
+}
+
+func TestValidateIPv4StaticConfigRequiredIf(t *testing.T) {
+	config := &testNetworkConfig{
+		IPv4Mode: null.StringFrom("static"),
+	}
+
+	err := SetDefaultsAndValidate(config)
+	if err == nil {
+		t.Fatalf("expected error, got nil")
+	}
+}
+
+func TestValidateIPv4StaticConfigValidateType(t *testing.T) {
+	config := &testNetworkConfig{
+		IPv4Static: &testIPv4StaticConfig{
+			Address: null.StringFrom("X"),
+			Netmask: null.StringFrom("255.255.255.0"),
+			Gateway: null.StringFrom("192.168.1.1"),
+			DNS:     []string{"8.8.8.8", "8.8.4.4"},
+		},
+		IPv4Mode: null.StringFrom("static"),
+	}
+
+	err := SetDefaultsAndValidate(config)
+	if err == nil {
+		t.Fatalf("expected error, got nil")
+	}
+}

internal/confparser/utils.go

@@ -0,0 +1,28 @@
+package confparser
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+
+	"github.com/guregu/null/v6"
+)
+
+func splitString(s string) []string {
+	if s == "" {
+		return []string{}
+	}
+
+	return strings.Split(s, ",")
+}
+
+func toString(v interface{}) (string, error) {
+	switch v := v.(type) {
+	case string:
+		return v, nil
+	case null.String:
+		return v.String, nil
+	}
+
+	return "", fmt.Errorf("unsupported type: %s", reflect.TypeOf(v))
+}

internal/logging/logger.go

@@ -0,0 +1,197 @@
+package logging
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/rs/zerolog"
+)
+
+type Logger struct {
+	l               *zerolog.Logger
+	scopeLoggers    map[string]*zerolog.Logger
+	scopeLevels     map[string]zerolog.Level
+	scopeLevelMutex sync.Mutex
+
+	defaultLogLevelFromEnv    zerolog.Level
+	defaultLogLevelFromConfig zerolog.Level
+	defaultLogLevel           zerolog.Level
+}
+
+const (
+	defaultLogLevel = zerolog.ErrorLevel
+)
+
+type logOutput struct {
+	mu *sync.Mutex
+}
+
+func (w *logOutput) Write(p []byte) (n int, err error) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+
+	// TODO: write to file or syslog
+	if sseServer != nil {
+		// use a goroutine to avoid blocking the Write method
+		go func() {
+			sseServer.Message <- string(p)
+		}()
+	}
+	return len(p), nil
+}
+
+var (
+	consoleLogOutput io.Writer = zerolog.ConsoleWriter{
+		Out:           os.Stdout,
+		TimeFormat:    time.RFC3339,
+		PartsOrder:    []string{"time", "level", "scope", "component", "message"},
+		FieldsExclude: []string{"scope", "component"},
+		FormatPartValueByName: func(value interface{}, name string) string {
+			val := fmt.Sprintf("%s", value)
+			if name == "component" {
+				if value == nil {
+					return "-"
+				}
+			}
+			return val
+		},
+	}
+	fileLogOutput    io.Writer = &logOutput{mu: &sync.Mutex{}}
+	defaultLogOutput           = zerolog.MultiLevelWriter(consoleLogOutput, fileLogOutput)
+
+	zerologLevels = map[string]zerolog.Level{
+		"DISABLE": zerolog.Disabled,
+		"NOLEVEL": zerolog.NoLevel,
+		"PANIC":   zerolog.PanicLevel,
+		"FATAL":   zerolog.FatalLevel,
+		"ERROR":   zerolog.ErrorLevel,
+		"WARN":    zerolog.WarnLevel,
+		"INFO":    zerolog.InfoLevel,
+		"DEBUG":   zerolog.DebugLevel,
+		"TRACE":   zerolog.TraceLevel,
+	}
+)
+
+func NewLogger(zerologLogger zerolog.Logger) *Logger {
+	return &Logger{
+		l:                         &zerologLogger,
+		scopeLoggers:              make(map[string]*zerolog.Logger),
+		scopeLevels:               make(map[string]zerolog.Level),
+		scopeLevelMutex:           sync.Mutex{},
+		defaultLogLevelFromEnv:    -2,
+		defaultLogLevelFromConfig: -2,
+		defaultLogLevel:           defaultLogLevel,
+	}
+}
+
+func (l *Logger) updateLogLevel() {
+	l.scopeLevelMutex.Lock()
+	defer l.scopeLevelMutex.Unlock()
+
+	l.scopeLevels = make(map[string]zerolog.Level)
+
+	finalDefaultLogLevel := l.defaultLogLevel
+
+	for name, level := range zerologLevels {
+		env := os.Getenv(fmt.Sprintf("JETKVM_LOG_%s", name))
+
+		if env == "" {
+			env = os.Getenv(fmt.Sprintf("PION_LOG_%s", name))
+		}
+
+		if env == "" {
+			env = os.Getenv(fmt.Sprintf("PIONS_LOG_%s", name))
+		}
+
+		if env == "" {
+			continue
+		}
+
+		if strings.ToLower(env) == "all" {
+			l.defaultLogLevelFromEnv = level
+
+			if finalDefaultLogLevel > level {
+				finalDefaultLogLevel = level
+			}
+
+			continue
+		}
+
+		scopes := strings.Split(strings.ToLower(env), ",")
+		for _, scope := range scopes {
+			l.scopeLevels[scope] = level
+		}
+	}
+
+	l.defaultLogLevel = finalDefaultLogLevel
+}
+
+func (l *Logger) getScopeLoggerLevel(scope string) zerolog.Level {
+	if l.scopeLevels == nil {
+		l.updateLogLevel()
+	}
+
+	var scopeLevel zerolog.Level
+	if l.defaultLogLevelFromConfig != -2 {
+		scopeLevel = l.defaultLogLevelFromConfig
+	}
+	if l.defaultLogLevelFromEnv != -2 {
+		scopeLevel = l.defaultLogLevelFromEnv
+	}
+
+	// if the scope is not in the map, use the default level from the root logger
+	if level, ok := l.scopeLevels[scope]; ok {
+		scopeLevel = level
+	}
+
+	return scopeLevel
+}
+
+func (l *Logger) newScopeLogger(scope string) zerolog.Logger {
+	scopeLevel := l.getScopeLoggerLevel(scope)
+	logger := l.l.Level(scopeLevel).With().Str("component", scope).Logger()
+
+	return logger
+}
+
+func (l *Logger) getLogger(scope string) *zerolog.Logger {
+	logger, ok := l.scopeLoggers[scope]
+	if !ok || logger == nil {
+		scopeLogger := l.newScopeLogger(scope)
+		l.scopeLoggers[scope] = &scopeLogger
+	}
+
+	return l.scopeLoggers[scope]
+}
+
+func (l *Logger) UpdateLogLevel(configDefaultLogLevel string) {
+	needUpdate := false
+
+	if configDefaultLogLevel != "" {
+		if logLevel, ok := zerologLevels[configDefaultLogLevel]; ok {
+			l.defaultLogLevelFromConfig = logLevel
+		} else {
+			l.l.Warn().Str("logLevel", configDefaultLogLevel).Msg("invalid defaultLogLevel from config, using ERROR")
+		}
+
+		if l.defaultLogLevelFromConfig != l.defaultLogLevel {
+			needUpdate = true
+		}
+	}
+
+	l.updateLogLevel()
+
+	if needUpdate {
+		for scope, logger := range l.scopeLoggers {
+			currentLevel := logger.GetLevel()
+			targetLevel := l.getScopeLoggerLevel(scope)
+			if currentLevel != targetLevel {
+				*logger = l.newScopeLogger(scope)
+			}
+		}
+	}
+}

internal/logging/pion.go

@@ -0,0 +1,63 @@
+package logging
+
+import (
+	"github.com/pion/logging"
+	"github.com/rs/zerolog"
+)
+
+type pionLogger struct {
+	logger *zerolog.Logger
+}
+
+// Print all messages except trace.
+func (c pionLogger) Trace(msg string) {
+	c.logger.Trace().Msg(msg)
+}
+func (c pionLogger) Tracef(format string, args ...interface{}) {
+	c.logger.Trace().Msgf(format, args...)
+}
+
+func (c pionLogger) Debug(msg string) {
+	c.logger.Debug().Msg(msg)
+}
+func (c pionLogger) Debugf(format string, args ...interface{}) {
+	c.logger.Debug().Msgf(format, args...)
+}
+func (c pionLogger) Info(msg string) {
+	c.logger.Info().Msg(msg)
+}
+func (c pionLogger) Infof(format string, args ...interface{}) {
+	c.logger.Info().Msgf(format, args...)
+}
+func (c pionLogger) Warn(msg string) {
+	c.logger.Warn().Msg(msg)
+}
+func (c pionLogger) Warnf(format string, args ...interface{}) {
+	c.logger.Warn().Msgf(format, args...)
+}
+func (c pionLogger) Error(msg string) {
+	c.logger.Error().Msg(msg)
+}
+func (c pionLogger) Errorf(format string, args ...interface{}) {
+	c.logger.Error().Msgf(format, args...)
+}
+
+// customLoggerFactory satisfies the interface logging.LoggerFactory
+// This allows us to create different loggers per subsystem. So we can
+// add custom behavior.
+type pionLoggerFactory struct{}
+
+func (c pionLoggerFactory) NewLogger(subsystem string) logging.LeveledLogger {
+	logger := rootLogger.getLogger(subsystem).With().
+		Str("scope", "pion").
+		Str("component", subsystem).
+		Logger()
+
+	return pionLogger{logger: &logger}
+}
+
+var defaultLoggerFactory = &pionLoggerFactory{}
+
+func GetPionDefaultLoggerFactory() logging.LoggerFactory {
+	return defaultLoggerFactory
+}

internal/logging/root.go

@@ -0,0 +1,20 @@
+package logging
+
+import "github.com/rs/zerolog"
+
+var (
+	rootZerologLogger = zerolog.New(defaultLogOutput).With().
+				Str("scope", "jetkvm").
+				Timestamp().
+				Stack().
+				Logger()
+	rootLogger = NewLogger(rootZerologLogger)
+)
+
+func GetRootLogger() *Logger {
+	return rootLogger
+}
+
+func GetSubsystemLogger(subsystem string) *zerolog.Logger {
+	return rootLogger.getLogger(subsystem)
+}

internal/logging/sse.go

@@ -0,0 +1,137 @@
+package logging
+
+import (
+	"embed"
+	"io"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/rs/zerolog"
+)
+
+//go:embed sse.html
+var sseHTML embed.FS
+
+type sseEvent struct {
+	Message       chan string
+	NewClients    chan chan string
+	ClosedClients chan chan string
+	TotalClients  map[chan string]bool
+}
+
+// New event messages are broadcast to all registered client connection channels
+type sseClientChan chan string
+
+var (
+	sseServer *sseEvent
+	sseLogger *zerolog.Logger
+)
+
+func init() {
+	sseServer = newSseServer()
+	sseLogger = GetSubsystemLogger("sse")
+}
+
+// Initialize event and Start procnteessing requests
+func newSseServer() (event *sseEvent) {
+	event = &sseEvent{
+		Message:       make(chan string),
+		NewClients:    make(chan chan string),
+		ClosedClients: make(chan chan string),
+		TotalClients:  make(map[chan string]bool),
+	}
+
+	go event.listen()
+
+	return
+}
+
+// It Listens all incoming requests from clients.
+// Handles addition and removal of clients and broadcast messages to clients.
+func (stream *sseEvent) listen() {
+	for {
+		select {
+		// Add new available client
+		case client := <-stream.NewClients:
+			stream.TotalClients[client] = true
+			sseLogger.Info().
+				Int("total_clients", len(stream.TotalClients)).
+				Msg("new client connected")
+
+		// Remove closed client
+		case client := <-stream.ClosedClients:
+			delete(stream.TotalClients, client)
+			close(client)
+			sseLogger.Info().Int("total_clients", len(stream.TotalClients)).Msg("client disconnected")
+
+		// Broadcast message to client
+		case eventMsg := <-stream.Message:
+			for clientMessageChan := range stream.TotalClients {
+				select {
+				case clientMessageChan <- eventMsg:
+					// Message sent successfully
+				default:
+					// Failed to send, dropping message
+				}
+			}
+		}
+	}
+}
+
+func (stream *sseEvent) serveHTTP() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		clientChan := make(sseClientChan)
+		stream.NewClients <- clientChan
+
+		go func() {
+			<-c.Writer.CloseNotify()
+
+			for range clientChan {
+			}
+
+			stream.ClosedClients <- clientChan
+		}()
+
+		c.Set("clientChan", clientChan)
+		c.Next()
+	}
+}
+
+func sseHeadersMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if c.Request.Method == "GET" && c.NegotiateFormat(gin.MIMEHTML) == gin.MIMEHTML {
+			c.FileFromFS("/sse.html", http.FS(sseHTML))
+			c.Status(http.StatusOK)
+			c.Abort()
+			return
+		}
+
+		c.Writer.Header().Set("Content-Type", "text/event-stream")
+		c.Writer.Header().Set("Cache-Control", "no-cache")
+		c.Writer.Header().Set("Connection", "keep-alive")
+		c.Writer.Header().Set("Transfer-Encoding", "chunked")
+		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
+		c.Next()
+	}
+}
+
+func AttachSSEHandler(router *gin.RouterGroup) {
+	router.StaticFS("/log-stream", http.FS(sseHTML))
+	router.GET("/log-stream", sseHeadersMiddleware(), sseServer.serveHTTP(), func(c *gin.Context) {
+		v, ok := c.Get("clientChan")
+		if !ok {
+			return
+		}
+		clientChan, ok := v.(sseClientChan)
+		if !ok {
+			return
+		}
+		c.Stream(func(w io.Writer) bool {
+			if msg, ok := <-clientChan; ok {
+				c.SSEvent("message", msg)
+				return true
+			}
+			return false
+		})
+	})
+}

internal/logging/sse.html

@@ -0,0 +1,319 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <title>Server Sent Event</title>
+    <style>
+        .main-container {
+            display: flex;
+            flex-direction: column;
+            gap: 10px;
+
+            font-family: 'Hack', monospace;
+            font-size: 12px;
+        }
+
+        #loading {
+            font-style: italic;
+        }
+
+        .log-entry {
+            font-size: 12px;
+            line-height: 1.2;
+        }
+
+        .log-entry > span {
+            min-width: 0;
+            overflow-wrap: break-word;
+            word-break: break-word;
+            margin-right: 10px;
+        }
+
+        .log-entry > span:last-child {
+            margin-right: 0;
+        }
+
+        .log-entry.log-entry-trace .log-level {
+            color: blue;
+        }
+
+        .log-entry.log-entry-debug .log-level {
+            color: gray;
+        }
+
+        .log-entry.log-entry-info .log-level {
+            color: green;
+        }
+
+        .log-entry.log-entry-warn .log-level {
+            color: yellow;
+        }
+
+        .log-entry.log-entry-error .log-level,
+        .log-entry.log-entry-fatal .log-level,
+        .log-entry.log-entry-panic .log-level {
+            color: red;
+        }
+
+        .log-entry.log-entry-info .log-message,
+        .log-entry.log-entry-warn .log-message,
+        .log-entry.log-entry-error .log-message,
+        .log-entry.log-entry-fatal .log-message,
+        .log-entry.log-entry-panic .log-message {
+            font-weight: bold;
+        }
+
+        .log-timestamp {
+            color: #666;
+            min-width: 150px;
+        }
+
+        .log-level {
+            font-size: 12px;
+            min-width: 50px;
+        }
+
+        .log-scope {
+            font-size: 12px;
+            min-width: 40px;
+        }
+
+        .log-component {
+            font-size: 12px;
+            min-width: 80px;
+        }
+
+        .log-message {
+            font-size: 12px;
+            white-space: nowrap;
+            overflow: hidden;
+            text-overflow: ellipsis;
+            max-width: 500px;
+        }
+
+        .log-extras {
+            color: #000;
+        }
+        .log-extras .log-extras-header {
+            font-weight: bold;
+            color:cornflowerblue;
+        }
+    </style>
+</head>
+
+<body>
+    <div class="main-container">
+        <div id="header">
+            <span id="loading">
+            Connecting to log stream...
+            </span>
+
+            <span id="stats">
+
+            </span>
+        </div>
+        <div id="event-data">
+
+        </div>
+    </div>
+</body>
+
+<script>
+    class LogStream {
+        constructor(url, eventDataElement, loadingElement, statsElement) {
+            this.url = url;
+            this.eventDataElement = eventDataElement;
+            this.loadingElement = loadingElement;
+            this.statsElement = statsElement;
+            this.stream = null;
+            this.reconnectAttempts = 0;
+            this.maxReconnectAttempts = 10;
+            this.reconnectDelay = 1000; // Start with 1 second
+            this.maxReconnectDelay = 30000; // Max 30 seconds
+            this.isConnecting = false;
+
+            this.totalMessages = 0;
+            
+            this.connect();
+        }
+
+        connect() {
+            if (this.isConnecting) return;
+            this.isConnecting = true;
+            
+            this.loadingElement.innerText = "Connecting to log stream...";
+            
+            this.stream = new EventSource(this.url);
+            
+            this.stream.onopen = () => {
+                this.isConnecting = false;
+                this.reconnectAttempts = 0;
+                this.reconnectDelay = 1000;
+                this.loadingElement.innerText = "Log stream connected.";
+
+
+                this.totalMessages = 0;
+                this.totalBytes = 0;
+            };
+            
+            this.stream.onmessage = (event) => {
+                this.totalBytes += event.data.length;
+                this.totalMessages++;
+
+                const data = JSON.parse(event.data);
+                this.addLogEntry(data);
+                this.updateStats();
+            };
+            
+            this.stream.onerror = () => {
+                this.isConnecting = false;
+                this.loadingElement.innerText = "Log stream disconnected.";
+                this.stream.close();
+                this.handleReconnect();
+            };
+        }
+
+        updateStats() {
+            this.statsElement.innerHTML = `Messages: <strong>${this.totalMessages}</strong>, Bytes: <strong>${this.totalBytes}</strong> `;
+        }
+        
+        handleReconnect() {
+            if (this.reconnectAttempts >= this.maxReconnectAttempts) {
+                this.loadingElement.innerText = "Failed to reconnect after multiple attempts";
+                return;
+            }
+            
+            this.reconnectAttempts++;
+            this.reconnectDelay = Math.min(this.reconnectDelay * 1, this.maxReconnectDelay);
+            
+            this.loadingElement.innerText = `Reconnecting in ${this.reconnectDelay/1000} seconds... (Attempt ${this.reconnectAttempts}/${this.maxReconnectAttempts})`;
+            
+            setTimeout(() => {
+                this.connect();
+            }, this.reconnectDelay);
+        }
+        
+        addLogEntry(data) {
+            const el = document.createElement("div");
+            el.className = "log-entry log-entry-" + data.level;
+
+            const timestamp = document.createElement("span");
+            timestamp.className = "log-timestamp";
+            timestamp.innerText = data.time;
+            el.appendChild(timestamp);
+
+            const level = document.createElement("span");
+            level.className = "log-level";
+            level.innerText = this.shortLogLevel(data.level);
+            el.appendChild(level);
+
+            const scope = document.createElement("span");
+            scope.className = "log-scope";
+            scope.innerText = data.scope;
+            el.appendChild(scope);
+
+            const component = document.createElement("span");
+            component.className = "log-component";
+            component.innerText = data.component;
+            el.appendChild(component);
+
+            const message = document.createElement("span");
+            message.className = "log-message";
+            message.innerText = data.message;
+            el.appendChild(message);
+
+            this.addLogExtras(el, data);
+
+            this.eventDataElement.appendChild(el);
+
+            window.scrollTo(0, document.body.scrollHeight);
+        }
+        
+        shortLogLevel(level) {
+            switch (level) {
+                case "trace":
+                    return "TRC";
+                case "debug":
+                    return "DBG";
+                case "info":
+                    return "INF";
+                case "warn":
+                    return "WRN";
+                case "error":
+                    return "ERR";
+                case "fatal":
+                    return "FTL";
+                case "panic":
+                    return "PNC";
+                default:
+                    return level;
+            }
+        }
+        
+        addLogExtras(el, data) {
+            const excludeKeys = [
+                "timestamp",
+                "time",
+                "level",
+                "scope",
+                "component",
+                "message",
+            ];
+            
+            const extras = {};
+            for (const key in data) {
+                if (excludeKeys.includes(key)) {
+                    continue;
+                }
+                extras[key] = data[key];
+            }
+
+            for (const key in extras) {
+                const extra = document.createElement("span");
+                extra.className = "log-extras log-extras-" + key;
+
+                const extraKey = document.createElement("span");
+                extraKey.className = "log-extras-header";
+                extraKey.innerText = key + '=';
+                extra.appendChild(extraKey);
+
+                const extraValue = document.createElement("span");
+                extraValue.className = "log-extras-value";
+                
+                let value = extras[key];
+                if (typeof value === 'object') {
+                    value = JSON.stringify(value);
+                }   
+                extraValue.innerText = value;
+                extra.appendChild(extraValue);
+
+                el.appendChild(extra);
+            }
+        }
+        
+        disconnect() {
+            if (this.stream) {
+                this.stream.close();
+                this.stream = null;
+            }
+        }
+    }
+
+    // Initialize the log stream when the page loads
+    document.addEventListener('DOMContentLoaded', () => {
+        const logStream = new LogStream(
+            "/developer/log-stream",
+            document.getElementById("event-data"),
+            document.getElementById("loading"),
+            document.getElementById("stats"),
+        );
+        
+        // Clean up when the page is unloaded
+        window.addEventListener('beforeunload', () => {
+            logStream.disconnect();
+        });
+    });
+</script>
+
+</html>

internal/logging/utils.go

@@ -0,0 +1,32 @@
+package logging
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/rs/zerolog"
+)
+
+var defaultLogger = zerolog.New(os.Stdout).Level(zerolog.InfoLevel)
+
+func GetDefaultLogger() *zerolog.Logger {
+	return &defaultLogger
+}
+
+func ErrorfL(l *zerolog.Logger, format string, err error, args ...interface{}) error {
+	// TODO: move rootLogger to logging package
+	if l == nil {
+		l = &defaultLogger
+	}
+
+	l.Error().Err(err).Msgf(format, args...)
+
+	if err == nil {
+		return fmt.Errorf(format, args...)
+	}
+
+	err_msg := err.Error() + ": %v"
+	err_args := append(args, err)
+
+	return fmt.Errorf(err_msg, err_args...)
+}

internal/mdns/mdns.go

@@ -0,0 +1,190 @@
+package mdns
+
+import (
+	"fmt"
+	"net"
+	"reflect"
+	"strings"
+	"sync"
+
+	"github.com/jetkvm/kvm/internal/logging"
+	pion_mdns "github.com/pion/mdns/v2"
+	"github.com/rs/zerolog"
+	"golang.org/x/net/ipv4"
+	"golang.org/x/net/ipv6"
+)
+
+type MDNS struct {
+	conn *pion_mdns.Conn
+	lock sync.Mutex
+	l    *zerolog.Logger
+
+	localNames    []string
+	listenOptions *MDNSListenOptions
+}
+
+type MDNSListenOptions struct {
+	IPv4 bool
+	IPv6 bool
+}
+
+type MDNSOptions struct {
+	Logger        *zerolog.Logger
+	LocalNames    []string
+	ListenOptions *MDNSListenOptions
+}
+
+const (
+	DefaultAddressIPv4 = pion_mdns.DefaultAddressIPv4
+	DefaultAddressIPv6 = pion_mdns.DefaultAddressIPv6
+)
+
+func NewMDNS(opts *MDNSOptions) (*MDNS, error) {
+	if opts.Logger == nil {
+		opts.Logger = logging.GetDefaultLogger()
+	}
+
+	if opts.ListenOptions == nil {
+		opts.ListenOptions = &MDNSListenOptions{
+			IPv4: true,
+			IPv6: true,
+		}
+	}
+
+	return &MDNS{
+		l:             opts.Logger,
+		lock:          sync.Mutex{},
+		localNames:    opts.LocalNames,
+		listenOptions: opts.ListenOptions,
+	}, nil
+}
+
+func (m *MDNS) start(allowRestart bool) error {
+	m.lock.Lock()
+	defer m.lock.Unlock()
+
+	if m.conn != nil {
+		if !allowRestart {
+			return fmt.Errorf("mDNS server already running")
+		}
+
+		m.conn.Close()
+	}
+
+	if m.listenOptions == nil {
+		return fmt.Errorf("listen options not set")
+	}
+
+	if !m.listenOptions.IPv4 && !m.listenOptions.IPv6 {
+		m.l.Info().Msg("mDNS server disabled")
+		return nil
+	}
+
+	var (
+		addr4, addr6 *net.UDPAddr
+		l4, l6       *net.UDPConn
+		p4           *ipv4.PacketConn
+		p6           *ipv6.PacketConn
+		err          error
+	)
+
+	if m.listenOptions.IPv4 {
+		addr4, err = net.ResolveUDPAddr("udp4", DefaultAddressIPv4)
+		if err != nil {
+			return err
+		}
+
+		l4, err = net.ListenUDP("udp4", addr4)
+		if err != nil {
+			return err
+		}
+
+		p4 = ipv4.NewPacketConn(l4)
+	}
+
+	if m.listenOptions.IPv6 {
+		addr6, err = net.ResolveUDPAddr("udp6", DefaultAddressIPv6)
+		if err != nil {
+			return err
+		}
+
+		l6, err = net.ListenUDP("udp6", addr6)
+		if err != nil {
+			return err
+		}
+
+		p6 = ipv6.NewPacketConn(l6)
+	}
+
+	scopeLogger := m.l.With().
+		Interface("local_names", m.localNames).
+		Bool("ipv4", m.listenOptions.IPv4).
+		Bool("ipv6", m.listenOptions.IPv6).
+		Logger()
+
+	newLocalNames := make([]string, len(m.localNames))
+	for i, name := range m.localNames {
+		newLocalNames[i] = strings.TrimRight(strings.ToLower(name), ".")
+		if !strings.HasSuffix(newLocalNames[i], ".local") {
+			newLocalNames[i] = newLocalNames[i] + ".local"
+		}
+	}
+
+	mDNSConn, err := pion_mdns.Server(p4, p6, &pion_mdns.Config{
+		LocalNames:    newLocalNames,
+		LoggerFactory: logging.GetPionDefaultLoggerFactory(),
+	})
+
+	if err != nil {
+		scopeLogger.Warn().Err(err).Msg("failed to start mDNS server")
+		return err
+	}
+
+	m.conn = mDNSConn
+	scopeLogger.Info().Msg("mDNS server started")
+
+	return nil
+}
+
+func (m *MDNS) Start() error {
+	return m.start(false)
+}
+
+func (m *MDNS) Restart() error {
+	return m.start(true)
+}
+
+func (m *MDNS) Stop() error {
+	m.lock.Lock()
+	defer m.lock.Unlock()
+
+	if m.conn == nil {
+		return nil
+	}
+
+	return m.conn.Close()
+}
+
+func (m *MDNS) SetLocalNames(localNames []string, always bool) error {
+	if reflect.DeepEqual(m.localNames, localNames) && !always {
+		return nil
+	}
+
+	m.localNames = localNames
+	_ = m.Restart()
+
+	return nil
+}
+
+func (m *MDNS) SetListenOptions(listenOptions *MDNSListenOptions) error {
+	if m.listenOptions != nil &&
+		m.listenOptions.IPv4 == listenOptions.IPv4 &&
+		m.listenOptions.IPv6 == listenOptions.IPv6 {
+		return nil
+	}
+
+	m.listenOptions = listenOptions
+	_ = m.Restart()
+
+	return nil
+}

internal/mdns/utils.go

@@ -0,0 +1 @@
+package mdns

internal/network/config.go

@@ -0,0 +1,110 @@
+package network
+
+import (
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/guregu/null/v6"
+	"github.com/jetkvm/kvm/internal/mdns"
+	"golang.org/x/net/idna"
+)
+
+type IPv6Address struct {
+	Address           net.IP     `json:"address"`
+	Prefix            net.IPNet  `json:"prefix"`
+	ValidLifetime     *time.Time `json:"valid_lifetime"`
+	PreferredLifetime *time.Time `json:"preferred_lifetime"`
+	Scope             int        `json:"scope"`
+}
+
+type IPv4StaticConfig struct {
+	Address null.String `json:"address,omitempty" validate_type:"ipv4" required:"true"`
+	Netmask null.String `json:"netmask,omitempty" validate_type:"ipv4" required:"true"`
+	Gateway null.String `json:"gateway,omitempty" validate_type:"ipv4" required:"true"`
+	DNS     []string    `json:"dns,omitempty" validate_type:"ipv4" required:"true"`
+}
+
+type IPv6StaticConfig struct {
+	Address null.String `json:"address,omitempty" validate_type:"ipv6" required:"true"`
+	Prefix  null.String `json:"prefix,omitempty" validate_type:"ipv6" required:"true"`
+	Gateway null.String `json:"gateway,omitempty" validate_type:"ipv6" required:"true"`
+	DNS     []string    `json:"dns,omitempty" validate_type:"ipv6" required:"true"`
+}
+type NetworkConfig struct {
+	Hostname null.String `json:"hostname,omitempty" validate_type:"hostname"`
+	Domain   null.String `json:"domain,omitempty" validate_type:"hostname"`
+
+	IPv4Mode   null.String       `json:"ipv4_mode,omitempty" one_of:"dhcp,static,disabled" default:"dhcp"`
+	IPv4Static *IPv4StaticConfig `json:"ipv4_static,omitempty" required_if:"IPv4Mode=static"`
+
+	IPv6Mode   null.String       `json:"ipv6_mode,omitempty" one_of:"slaac,dhcpv6,slaac_and_dhcpv6,static,link_local,disabled" default:"slaac"`
+	IPv6Static *IPv6StaticConfig `json:"ipv6_static,omitempty" required_if:"IPv6Mode=static"`
+
+	LLDPMode                null.String `json:"lldp_mode,omitempty" one_of:"disabled,basic,all" default:"basic"`
+	LLDPTxTLVs              []string    `json:"lldp_tx_tlvs,omitempty" one_of:"chassis,port,system,vlan" default:"chassis,port,system,vlan"`
+	MDNSMode                null.String `json:"mdns_mode,omitempty" one_of:"disabled,auto,ipv4_only,ipv6_only" default:"auto"`
+	TimeSyncMode            null.String `json:"time_sync_mode,omitempty" one_of:"ntp_only,ntp_and_http,http_only,custom" default:"ntp_and_http"`
+	TimeSyncOrdering        []string    `json:"time_sync_ordering,omitempty" one_of:"http,ntp,ntp_dhcp,ntp_user_provided,ntp_fallback" default:"ntp,http"`
+	TimeSyncDisableFallback null.Bool   `json:"time_sync_disable_fallback,omitempty" default:"false"`
+	TimeSyncParallel        null.Int    `json:"time_sync_parallel,omitempty" default:"4"`
+}
+
+func (c *NetworkConfig) GetMDNSMode() *mdns.MDNSListenOptions {
+	mode := c.MDNSMode.String
+	listenOptions := &mdns.MDNSListenOptions{
+		IPv4: true,
+		IPv6: true,
+	}
+
+	switch mode {
+	case "ipv4_only":
+		listenOptions.IPv6 = false
+	case "ipv6_only":
+		listenOptions.IPv4 = false
+	case "disabled":
+		listenOptions.IPv4 = false
+		listenOptions.IPv6 = false
+	}
+
+	return listenOptions
+}
+func (s *NetworkInterfaceState) GetHostname() string {
+	hostname := ToValidHostname(s.config.Hostname.String)
+
+	if hostname == "" {
+		return s.defaultHostname
+	}
+
+	return hostname
+}
+
+func ToValidDomain(domain string) string {
+	ascii, err := idna.Lookup.ToASCII(domain)
+	if err != nil {
+		return ""
+	}
+
+	return ascii
+}
+
+func (s *NetworkInterfaceState) GetDomain() string {
+	domain := ToValidDomain(s.config.Domain.String)
+
+	if domain == "" {
+		lease := s.dhcpClient.GetLease()
+		if lease != nil && lease.Domain != "" {
+			domain = ToValidDomain(lease.Domain)
+		}
+	}
+
+	if domain == "" {
+		return "local"
+	}
+
+	return domain
+}
+
+func (s *NetworkInterfaceState) GetFQDN() string {
+	return fmt.Sprintf("%s.%s", s.GetHostname(), s.GetDomain())
+}

internal/network/dhcp.go

@@ -0,0 +1,11 @@
+package network
+
+type DhcpTargetState int
+
+const (
+	DhcpTargetStateDoNothing DhcpTargetState = iota
+	DhcpTargetStateStart
+	DhcpTargetStateStop
+	DhcpTargetStateRenew
+	DhcpTargetStateRelease
+)

internal/network/hostname.go

@@ -0,0 +1,137 @@
+package network
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"strings"
+	"sync"
+
+	"golang.org/x/net/idna"
+)
+
+const (
+	hostnamePath = "/etc/hostname"
+	hostsPath    = "/etc/hosts"
+)
+
+var (
+	hostnameLock sync.Mutex = sync.Mutex{}
+)
+
+func updateEtcHosts(hostname string, fqdn string) error {
+	// update /etc/hosts
+	hostsFile, err := os.OpenFile(hostsPath, os.O_RDWR|os.O_SYNC, os.ModeExclusive)
+	if err != nil {
+		return fmt.Errorf("failed to open %s: %w", hostsPath, err)
+	}
+	defer hostsFile.Close()
+
+	// read all lines
+	if _, err := hostsFile.Seek(0, io.SeekStart); err != nil {
+		return fmt.Errorf("failed to seek %s: %w", hostsPath, err)
+	}
+
+	lines, err := io.ReadAll(hostsFile)
+	if err != nil {
+		return fmt.Errorf("failed to read %s: %w", hostsPath, err)
+	}
+
+	newLines := []string{}
+	hostLine := fmt.Sprintf("127.0.1.1\t%s %s", hostname, fqdn)
+	hostLineExists := false
+
+	for _, line := range strings.Split(string(lines), "\n") {
+		if strings.HasPrefix(line, "127.0.1.1") {
+			hostLineExists = true
+			line = hostLine
+		}
+		newLines = append(newLines, line)
+	}
+
+	if !hostLineExists {
+		newLines = append(newLines, hostLine)
+	}
+
+	if err := hostsFile.Truncate(0); err != nil {
+		return fmt.Errorf("failed to truncate %s: %w", hostsPath, err)
+	}
+
+	if _, err := hostsFile.Seek(0, io.SeekStart); err != nil {
+		return fmt.Errorf("failed to seek %s: %w", hostsPath, err)
+	}
+
+	if _, err := hostsFile.Write([]byte(strings.Join(newLines, "\n"))); err != nil {
+		return fmt.Errorf("failed to write %s: %w", hostsPath, err)
+	}
+
+	return nil
+}
+
+func ToValidHostname(hostname string) string {
+	ascii, err := idna.Lookup.ToASCII(hostname)
+	if err != nil {
+		return ""
+	}
+	return ascii
+}
+
+func SetHostname(hostname string, fqdn string) error {
+	hostnameLock.Lock()
+	defer hostnameLock.Unlock()
+
+	hostname = ToValidHostname(strings.TrimSpace(hostname))
+	fqdn = ToValidHostname(strings.TrimSpace(fqdn))
+
+	if hostname == "" {
+		return fmt.Errorf("invalid hostname: %s", hostname)
+	}
+
+	if fqdn == "" {
+		fqdn = hostname
+	}
+
+	// update /etc/hostname
+	if err := os.WriteFile(hostnamePath, []byte(hostname), 0644); err != nil {
+		return fmt.Errorf("failed to write %s: %w", hostnamePath, err)
+	}
+
+	// update /etc/hosts
+	if err := updateEtcHosts(hostname, fqdn); err != nil {
+		return fmt.Errorf("failed to update /etc/hosts: %w", err)
+	}
+
+	// run hostname
+	if err := exec.Command("hostname", "-F", hostnamePath).Run(); err != nil {
+		return fmt.Errorf("failed to run hostname: %w", err)
+	}
+
+	return nil
+}
+
+func (s *NetworkInterfaceState) setHostnameIfNotSame() error {
+	hostname := s.GetHostname()
+	currentHostname, _ := os.Hostname()
+
+	fqdn := fmt.Sprintf("%s.%s", hostname, s.GetDomain())
+
+	if currentHostname == hostname && s.currentFqdn == fqdn && s.currentHostname == hostname {
+		return nil
+	}
+
+	scopedLogger := s.l.With().Str("hostname", hostname).Str("fqdn", fqdn).Logger()
+
+	err := SetHostname(hostname, fqdn)
+	if err != nil {
+		scopedLogger.Error().Err(err).Msg("failed to set hostname")
+		return err
+	}
+
+	s.currentHostname = hostname
+	s.currentFqdn = fqdn
+
+	scopedLogger.Info().Msg("hostname set")
+
+	return nil
+}

internal/network/netif.go

@@ -0,0 +1,346 @@
+package network
+
+import (
+	"fmt"
+	"net"
+	"sync"
+
+	"github.com/jetkvm/kvm/internal/confparser"
+	"github.com/jetkvm/kvm/internal/logging"
+	"github.com/jetkvm/kvm/internal/udhcpc"
+	"github.com/rs/zerolog"
+
+	"github.com/vishvananda/netlink"
+)
+
+type NetworkInterfaceState struct {
+	interfaceName string
+	interfaceUp   bool
+	ipv4Addr      *net.IP
+	ipv4Addresses []string
+	ipv6Addr      *net.IP
+	ipv6Addresses []IPv6Address
+	ipv6LinkLocal *net.IP
+	macAddr       *net.HardwareAddr
+
+	l         *zerolog.Logger
+	stateLock sync.Mutex
+
+	config     *NetworkConfig
+	dhcpClient *udhcpc.DHCPClient
+
+	defaultHostname string
+	currentHostname string
+	currentFqdn     string
+
+	onStateChange  func(state *NetworkInterfaceState)
+	onInitialCheck func(state *NetworkInterfaceState)
+	cbConfigChange func(config *NetworkConfig)
+
+	checked bool
+}
+
+type NetworkInterfaceOptions struct {
+	InterfaceName     string
+	DhcpPidFile       string
+	Logger            *zerolog.Logger
+	DefaultHostname   string
+	OnStateChange     func(state *NetworkInterfaceState)
+	OnInitialCheck    func(state *NetworkInterfaceState)
+	OnDhcpLeaseChange func(lease *udhcpc.Lease)
+	OnConfigChange    func(config *NetworkConfig)
+	NetworkConfig     *NetworkConfig
+}
+
+func NewNetworkInterfaceState(opts *NetworkInterfaceOptions) (*NetworkInterfaceState, error) {
+	if opts.NetworkConfig == nil {
+		return nil, fmt.Errorf("NetworkConfig can not be nil")
+	}
+
+	if opts.DefaultHostname == "" {
+		opts.DefaultHostname = "jetkvm"
+	}
+
+	err := confparser.SetDefaultsAndValidate(opts.NetworkConfig)
+	if err != nil {
+		return nil, err
+	}
+
+	l := opts.Logger
+	s := &NetworkInterfaceState{
+		interfaceName:   opts.InterfaceName,
+		defaultHostname: opts.DefaultHostname,
+		stateLock:       sync.Mutex{},
+		l:               l,
+		onStateChange:   opts.OnStateChange,
+		onInitialCheck:  opts.OnInitialCheck,
+		cbConfigChange:  opts.OnConfigChange,
+		config:          opts.NetworkConfig,
+	}
+
+	// create the dhcp client
+	dhcpClient := udhcpc.NewDHCPClient(&udhcpc.DHCPClientOptions{
+		InterfaceName: opts.InterfaceName,
+		PidFile:       opts.DhcpPidFile,
+		Logger:        l,
+		OnLeaseChange: func(lease *udhcpc.Lease) {
+			_, err := s.update()
+			if err != nil {
+				opts.Logger.Error().Err(err).Msg("failed to update network state")
+				return
+			}
+
+			_ = s.setHostnameIfNotSame()
+
+			opts.OnDhcpLeaseChange(lease)
+		},
+	})
+
+	s.dhcpClient = dhcpClient
+
+	return s, nil
+}
+
+func (s *NetworkInterfaceState) IsUp() bool {
+	return s.interfaceUp
+}
+
+func (s *NetworkInterfaceState) HasIPAssigned() bool {
+	return s.ipv4Addr != nil || s.ipv6Addr != nil
+}
+
+func (s *NetworkInterfaceState) IsOnline() bool {
+	return s.IsUp() && s.HasIPAssigned()
+}
+
+func (s *NetworkInterfaceState) IPv4() *net.IP {
+	return s.ipv4Addr
+}
+
+func (s *NetworkInterfaceState) IPv4String() string {
+	if s.ipv4Addr == nil {
+		return "..."
+	}
+	return s.ipv4Addr.String()
+}
+
+func (s *NetworkInterfaceState) IPv6() *net.IP {
+	return s.ipv6Addr
+}
+
+func (s *NetworkInterfaceState) IPv6String() string {
+	if s.ipv6Addr == nil {
+		return "..."
+	}
+	return s.ipv6Addr.String()
+}
+
+func (s *NetworkInterfaceState) MAC() *net.HardwareAddr {
+	return s.macAddr
+}
+
+func (s *NetworkInterfaceState) MACString() string {
+	if s.macAddr == nil {
+		return ""
+	}
+	return s.macAddr.String()
+}
+
+func (s *NetworkInterfaceState) update() (DhcpTargetState, error) {
+	s.stateLock.Lock()
+	defer s.stateLock.Unlock()
+
+	dhcpTargetState := DhcpTargetStateDoNothing
+
+	iface, err := netlink.LinkByName(s.interfaceName)
+	if err != nil {
+		s.l.Error().Err(err).Msg("failed to get interface")
+		return dhcpTargetState, err
+	}
+
+	// detect if the interface status changed
+	var changed bool
+	attrs := iface.Attrs()
+	state := attrs.OperState
+	newInterfaceUp := state == netlink.OperUp
+
+	// check if the interface is coming up
+	interfaceGoingUp := !s.interfaceUp && newInterfaceUp
+	interfaceGoingDown := s.interfaceUp && !newInterfaceUp
+
+	if s.interfaceUp != newInterfaceUp {
+		s.interfaceUp = newInterfaceUp
+		changed = true
+	}
+
+	if changed {
+		if interfaceGoingUp {
+			s.l.Info().Msg("interface state transitioned to up")
+			dhcpTargetState = DhcpTargetStateRenew
+		} else if interfaceGoingDown {
+			s.l.Info().Msg("interface state transitioned to down")
+		}
+	}
+
+	// set the mac address
+	s.macAddr = &attrs.HardwareAddr
+
+	// get the ip addresses
+	addrs, err := netlinkAddrs(iface)
+	if err != nil {
+		return dhcpTargetState, logging.ErrorfL(s.l, "failed to get ip addresses", err)
+	}
+
+	var (
+		ipv4Addresses       = make([]net.IP, 0)
+		ipv4AddressesString = make([]string, 0)
+		ipv6Addresses       = make([]IPv6Address, 0)
+		// ipv6AddressesString = make([]string, 0)
+		ipv6LinkLocal *net.IP
+	)
+
+	for _, addr := range addrs {
+		if addr.IP.To4() != nil {
+			scopedLogger := s.l.With().Str("ipv4", addr.IP.String()).Logger()
+			if interfaceGoingDown {
+				// remove all IPv4 addresses from the interface.
+				scopedLogger.Info().Msg("state transitioned to down, removing IPv4 address")
+				err := netlink.AddrDel(iface, &addr)
+				if err != nil {
+					scopedLogger.Warn().Err(err).Msg("failed to delete address")
+				}
+				// notify the DHCP client to release the lease
+				dhcpTargetState = DhcpTargetStateRelease
+				continue
+			}
+			ipv4Addresses = append(ipv4Addresses, addr.IP)
+			ipv4AddressesString = append(ipv4AddressesString, addr.IPNet.String())
+		} else if addr.IP.To16() != nil {
+			scopedLogger := s.l.With().Str("ipv6", addr.IP.String()).Logger()
+			// check if it's a link local address
+			if addr.IP.IsLinkLocalUnicast() {
+				ipv6LinkLocal = &addr.IP
+				continue
+			}
+
+			if !addr.IP.IsGlobalUnicast() {
+				scopedLogger.Trace().Msg("not a global unicast address, skipping")
+				continue
+			}
+
+			if interfaceGoingDown {
+				scopedLogger.Info().Msg("state transitioned to down, removing IPv6 address")
+				err := netlink.AddrDel(iface, &addr)
+				if err != nil {
+					scopedLogger.Warn().Err(err).Msg("failed to delete address")
+				}
+				continue
+			}
+			ipv6Addresses = append(ipv6Addresses, IPv6Address{
+				Address:           addr.IP,
+				Prefix:            *addr.IPNet,
+				ValidLifetime:     lifetimeToTime(addr.ValidLft),
+				PreferredLifetime: lifetimeToTime(addr.PreferedLft),
+				Scope:             addr.Scope,
+			})
+			// ipv6AddressesString = append(ipv6AddressesString, addr.IPNet.String())
+		}
+	}
+
+	if len(ipv4Addresses) > 0 {
+		// compare the addresses to see if there's a change
+		if s.ipv4Addr == nil || s.ipv4Addr.String() != ipv4Addresses[0].String() {
+			scopedLogger := s.l.With().Str("ipv4", ipv4Addresses[0].String()).Logger()
+			if s.ipv4Addr != nil {
+				scopedLogger.Info().
+					Str("old_ipv4", s.ipv4Addr.String()).
+					Msg("IPv4 address changed")
+			} else {
+				scopedLogger.Info().Msg("IPv4 address found")
+			}
+			s.ipv4Addr = &ipv4Addresses[0]
+			changed = true
+		}
+	}
+	s.ipv4Addresses = ipv4AddressesString
+
+	if ipv6LinkLocal != nil {
+		if s.ipv6LinkLocal == nil || s.ipv6LinkLocal.String() != ipv6LinkLocal.String() {
+			scopedLogger := s.l.With().Str("ipv6", ipv6LinkLocal.String()).Logger()
+			if s.ipv6LinkLocal != nil {
+				scopedLogger.Info().
+					Str("old_ipv6", s.ipv6LinkLocal.String()).
+					Msg("IPv6 link local address changed")
+			} else {
+				scopedLogger.Info().Msg("IPv6 link local address found")
+			}
+			s.ipv6LinkLocal = ipv6LinkLocal
+			changed = true
+		}
+	}
+	s.ipv6Addresses = ipv6Addresses
+
+	if len(ipv6Addresses) > 0 {
+		// compare the addresses to see if there's a change
+		if s.ipv6Addr == nil || s.ipv6Addr.String() != ipv6Addresses[0].Address.String() {
+			scopedLogger := s.l.With().Str("ipv6", ipv6Addresses[0].Address.String()).Logger()
+			if s.ipv6Addr != nil {
+				scopedLogger.Info().
+					Str("old_ipv6", s.ipv6Addr.String()).
+					Msg("IPv6 address changed")
+			} else {
+				scopedLogger.Info().Msg("IPv6 address found")
+			}
+			s.ipv6Addr = &ipv6Addresses[0].Address
+			changed = true
+		}
+	}
+
+	// if it's the initial check, we'll set changed to false
+	initialCheck := !s.checked
+	if initialCheck {
+		s.checked = true
+		changed = false
+		if dhcpTargetState == DhcpTargetStateRenew {
+			// it's the initial check, we'll start the DHCP client
+			// dhcpTargetState = DhcpTargetStateStart
+			// TODO: manage DHCP client start/stop
+			dhcpTargetState = DhcpTargetStateDoNothing
+		}
+	}
+
+	if initialCheck {
+		s.onInitialCheck(s)
+	} else if changed {
+		s.onStateChange(s)
+	}
+
+	return dhcpTargetState, nil
+}
+
+func (s *NetworkInterfaceState) CheckAndUpdateDhcp() error {
+	dhcpTargetState, err := s.update()
+	if err != nil {
+		return logging.ErrorfL(s.l, "failed to update network state", err)
+	}
+
+	switch dhcpTargetState {
+	case DhcpTargetStateRenew:
+		s.l.Info().Msg("renewing DHCP lease")
+		_ = s.dhcpClient.Renew()
+	case DhcpTargetStateRelease:
+		s.l.Info().Msg("releasing DHCP lease")
+		_ = s.dhcpClient.Release()
+	case DhcpTargetStateStart:
+		s.l.Warn().Msg("dhcpTargetStateStart not implemented")
+	case DhcpTargetStateStop:
+		s.l.Warn().Msg("dhcpTargetStateStop not implemented")
+	}
+
+	return nil
+}
+
+func (s *NetworkInterfaceState) onConfigChange(config *NetworkConfig) {
+	_ = s.setHostnameIfNotSame()
+	s.cbConfigChange(config)
+}

internal/network/netif_linux.go

@@ -0,0 +1,58 @@
+//go:build linux
+
+package network
+
+import (
+	"time"
+
+	"github.com/vishvananda/netlink"
+	"github.com/vishvananda/netlink/nl"
+)
+
+func (s *NetworkInterfaceState) HandleLinkUpdate(update netlink.LinkUpdate) {
+	if update.Link.Attrs().Name == s.interfaceName {
+		s.l.Info().Interface("update", update).Msg("interface link update received")
+		_ = s.CheckAndUpdateDhcp()
+	}
+}
+
+func (s *NetworkInterfaceState) Run() error {
+	updates := make(chan netlink.LinkUpdate)
+	done := make(chan struct{})
+
+	if err := netlink.LinkSubscribe(updates, done); err != nil {
+		s.l.Warn().Err(err).Msg("failed to subscribe to link updates")
+		return err
+	}
+
+	_ = s.setHostnameIfNotSame()
+
+	// run the dhcp client
+	go s.dhcpClient.Run() // nolint:errcheck
+
+	if err := s.CheckAndUpdateDhcp(); err != nil {
+		return err
+	}
+
+	go func() {
+		ticker := time.NewTicker(1 * time.Second)
+		defer ticker.Stop()
+
+		for {
+			select {
+			case update := <-updates:
+				s.HandleLinkUpdate(update)
+			case <-ticker.C:
+				_ = s.CheckAndUpdateDhcp()
+			case <-done:
+				return
+			}
+		}
+	}()
+
+	return nil
+}
+
+func netlinkAddrs(iface netlink.Link) ([]netlink.Addr, error) {
+	return netlink.AddrList(iface, nl.FAMILY_ALL)
+}

internal/network/netif_notlinux.go

@@ -0,0 +1,21 @@
+//go:build !linux
+
+package network
+
+import (
+	"fmt"
+
+	"github.com/vishvananda/netlink"
+)
+
+func (s *NetworkInterfaceState) HandleLinkUpdate() error {
+	return fmt.Errorf("not implemented")
+}
+
+func (s *NetworkInterfaceState) Run() error {
+	return fmt.Errorf("not implemented")
+}
+
+func netlinkAddrs(iface netlink.Link) ([]netlink.Addr, error) {
+	return nil, fmt.Errorf("not implemented")
+}

internal/network/rpc.go

@@ -0,0 +1,126 @@
+package network
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/jetkvm/kvm/internal/confparser"
+	"github.com/jetkvm/kvm/internal/udhcpc"
+)
+
+type RpcIPv6Address struct {
+	Address           string     `json:"address"`
+	ValidLifetime     *time.Time `json:"valid_lifetime,omitempty"`
+	PreferredLifetime *time.Time `json:"preferred_lifetime,omitempty"`
+	Scope             int        `json:"scope"`
+}
+
+type RpcNetworkState struct {
+	InterfaceName string           `json:"interface_name"`
+	MacAddress    string           `json:"mac_address"`
+	IPv4          string           `json:"ipv4,omitempty"`
+	IPv6          string           `json:"ipv6,omitempty"`
+	IPv6LinkLocal string           `json:"ipv6_link_local,omitempty"`
+	IPv4Addresses []string         `json:"ipv4_addresses,omitempty"`
+	IPv6Addresses []RpcIPv6Address `json:"ipv6_addresses,omitempty"`
+	DHCPLease     *udhcpc.Lease    `json:"dhcp_lease,omitempty"`
+}
+
+type RpcNetworkSettings struct {
+	NetworkConfig
+}
+
+func (s *NetworkInterfaceState) MacAddress() string {
+	if s.macAddr == nil {
+		return ""
+	}
+
+	return s.macAddr.String()
+}
+
+func (s *NetworkInterfaceState) IPv4Address() string {
+	if s.ipv4Addr == nil {
+		return ""
+	}
+
+	return s.ipv4Addr.String()
+}
+
+func (s *NetworkInterfaceState) IPv6Address() string {
+	if s.ipv6Addr == nil {
+		return ""
+	}
+
+	return s.ipv6Addr.String()
+}
+
+func (s *NetworkInterfaceState) IPv6LinkLocalAddress() string {
+	if s.ipv6LinkLocal == nil {
+		return ""
+	}
+
+	return s.ipv6LinkLocal.String()
+}
+
+func (s *NetworkInterfaceState) RpcGetNetworkState() RpcNetworkState {
+	ipv6Addresses := make([]RpcIPv6Address, 0)
+
+	if s.ipv6Addresses != nil {
+		for _, addr := range s.ipv6Addresses {
+			ipv6Addresses = append(ipv6Addresses, RpcIPv6Address{
+				Address:           addr.Prefix.String(),
+				ValidLifetime:     addr.ValidLifetime,
+				PreferredLifetime: addr.PreferredLifetime,
+				Scope:             addr.Scope,
+			})
+		}
+	}
+
+	return RpcNetworkState{
+		InterfaceName: s.interfaceName,
+		MacAddress:    s.MacAddress(),
+		IPv4:          s.IPv4Address(),
+		IPv6:          s.IPv6Address(),
+		IPv6LinkLocal: s.IPv6LinkLocalAddress(),
+		IPv4Addresses: s.ipv4Addresses,
+		IPv6Addresses: ipv6Addresses,
+		DHCPLease:     s.dhcpClient.GetLease(),
+	}
+}
+
+func (s *NetworkInterfaceState) RpcGetNetworkSettings() RpcNetworkSettings {
+	if s.config == nil {
+		return RpcNetworkSettings{}
+	}
+
+	return RpcNetworkSettings{
+		NetworkConfig: *s.config,
+	}
+}
+
+func (s *NetworkInterfaceState) RpcSetNetworkSettings(settings RpcNetworkSettings) error {
+	currentSettings := s.config
+
+	err := confparser.SetDefaultsAndValidate(&settings.NetworkConfig)
+	if err != nil {
+		return err
+	}
+
+	if IsSame(currentSettings, settings.NetworkConfig) {
+		// no changes, do nothing
+		return nil
+	}
+
+	s.config = &settings.NetworkConfig
+	s.onConfigChange(s.config)
+
+	return nil
+}
+
+func (s *NetworkInterfaceState) RpcRenewDHCPLease() error {
+	if s.dhcpClient == nil {
+		return fmt.Errorf("dhcp client not initialized")
+	}
+
+	return s.dhcpClient.Renew()
+}

internal/network/utils.go

@@ -0,0 +1,26 @@
+package network
+
+import (
+	"encoding/json"
+	"time"
+)
+
+func lifetimeToTime(lifetime int) *time.Time {
+	if lifetime == 0 {
+		return nil
+	}
+	t := time.Now().Add(time.Duration(lifetime) * time.Second)
+	return &t
+}
+
+func IsSame(a, b interface{}) bool {
+	aJSON, err := json.Marshal(a)
+	if err != nil {
+		return false
+	}
+	bJSON, err := json.Marshal(b)
+	if err != nil {
+		return false
+	}
+	return string(aJSON) == string(bJSON)
+}

internal/timesync/http.go

@@ -0,0 +1,132 @@
+package timesync
+
+import (
+	"context"
+	"errors"
+	"math/rand"
+	"net/http"
+	"strconv"
+	"time"
+)
+
+var defaultHTTPUrls = []string{
+	"http://www.gstatic.com/generate_204",
+	"http://cp.cloudflare.com/",
+	"http://edge-http.microsoft.com/captiveportal/generate_204",
+	// Firefox, Apple, and Microsoft have inconsistent results, so we don't use it
+	// "http://detectportal.firefox.com/",
+	// "http://www.apple.com/library/test/success.html",
+	// "http://www.msftconnecttest.com/connecttest.txt",
+}
+
+func (t *TimeSync) queryAllHttpTime() (now *time.Time) {
+	chunkSize := 4
+	httpUrls := t.httpUrls
+
+	// shuffle the http urls to avoid always querying the same servers
+	rand.Shuffle(len(httpUrls), func(i, j int) { httpUrls[i], httpUrls[j] = httpUrls[j], httpUrls[i] })
+
+	for i := 0; i < len(httpUrls); i += chunkSize {
+		chunk := httpUrls[i:min(i+chunkSize, len(httpUrls))]
+		results := t.queryMultipleHttp(chunk, timeSyncTimeout)
+		if results != nil {
+			return results
+		}
+	}
+
+	return nil
+}
+
+func (t *TimeSync) queryMultipleHttp(urls []string, timeout time.Duration) (now *time.Time) {
+	results := make(chan *time.Time, len(urls))
+
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+
+	for _, url := range urls {
+		go func(url string) {
+			scopedLogger := t.l.With().
+				Str("http_url", url).
+				Logger()
+
+			metricHttpRequestCount.WithLabelValues(url).Inc()
+			metricHttpTotalRequestCount.Inc()
+
+			startTime := time.Now()
+			now, response, err := queryHttpTime(
+				ctx,
+				url,
+				timeout,
+			)
+			duration := time.Since(startTime)
+
+			metricHttpServerLastRTT.WithLabelValues(url).Set(float64(duration.Milliseconds()))
+			metricHttpServerRttHistogram.WithLabelValues(url).Observe(float64(duration.Milliseconds()))
+
+			status := 0
+			if response != nil {
+				status = response.StatusCode
+			}
+			metricHttpServerInfo.WithLabelValues(
+				url,
+				strconv.Itoa(status),
+			).Set(1)
+
+			if err == nil {
+				metricHttpTotalSuccessCount.Inc()
+				metricHttpSuccessCount.WithLabelValues(url).Inc()
+
+				requestId := response.Header.Get("X-Request-Id")
+				if requestId != "" {
+					requestId = response.Header.Get("X-Msedge-Ref")
+				}
+				if requestId == "" {
+					requestId = response.Header.Get("Cf-Ray")
+				}
+				scopedLogger.Info().
+					Str("time", now.Format(time.RFC3339)).
+					Int("status", status).
+					Str("request_id", requestId).
+					Str("time_taken", duration.String()).
+					Msg("HTTP server returned time")
+
+				cancel()
+				results <- now
+			} else if errors.Is(err, context.Canceled) {
+				metricHttpCancelCount.WithLabelValues(url).Inc()
+				metricHttpTotalCancelCount.Inc()
+			} else {
+				scopedLogger.Warn().
+					Str("error", err.Error()).
+					Int("status", status).
+					Msg("failed to query HTTP server")
+			}
+		}(url)
+	}
+
+	return <-results
+}
+
+func queryHttpTime(
+	ctx context.Context,
+	url string,
+	timeout time.Duration,
+) (now *time.Time, response *http.Response, err error) {
+	client := http.Client{
+		Timeout: timeout,
+	}
+	req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, nil, err
+	}
+	dateStr := resp.Header.Get("Date")
+	parsedTime, err := time.Parse(time.RFC1123, dateStr)
+	if err != nil {
+		return nil, nil, err
+	}
+	return &parsedTime, resp, nil
+}

internal/timesync/metrics.go

@@ -0,0 +1,147 @@
+package timesync
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+var (
+	metricTimeSyncStatus = promauto.NewGauge(
+		prometheus.GaugeOpts{
+			Name: "jetkvm_timesync_status",
+			Help: "The status of the timesync, 1 if successful, 0 if not",
+		},
+	)
+	metricTimeSyncCount = promauto.NewCounter(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_count",
+			Help: "The number of times the timesync has been run",
+		},
+	)
+	metricTimeSyncSuccessCount = promauto.NewCounter(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_success_count",
+			Help: "The number of times the timesync has been successful",
+		},
+	)
+	metricRTCUpdateCount = promauto.NewCounter( //nolint:unused
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_rtc_update_count",
+			Help: "The number of times the RTC has been updated",
+		},
+	)
+	metricNtpTotalSuccessCount = promauto.NewCounter(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_ntp_total_success_count",
+			Help: "The total number of successful NTP requests",
+		},
+	)
+	metricNtpTotalRequestCount = promauto.NewCounter(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_ntp_total_request_count",
+			Help: "The total number of NTP requests sent",
+		},
+	)
+	metricNtpSuccessCount = promauto.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_ntp_success_count",
+			Help: "The number of successful NTP requests",
+		},
+		[]string{"url"},
+	)
+	metricNtpRequestCount = promauto.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_ntp_request_count",
+			Help: "The number of NTP requests sent to the server",
+		},
+		[]string{"url"},
+	)
+	metricNtpServerLastRTT = promauto.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "jetkvm_timesync_ntp_server_last_rtt",
+			Help: "The last RTT of the NTP server in milliseconds",
+		},
+		[]string{"url"},
+	)
+	metricNtpServerRttHistogram = promauto.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Name: "jetkvm_timesync_ntp_server_rtt",
+			Help: "The histogram of the RTT of the NTP server in milliseconds",
+			Buckets: []float64{
+				10, 25, 50, 100, 200, 300, 500, 1000,
+			},
+		},
+		[]string{"url"},
+	)
+	metricNtpServerInfo = promauto.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "jetkvm_timesync_ntp_server_info",
+			Help: "The info of the NTP server",
+		},
+		[]string{"url", "reference", "stratum", "precision"},
+	)
+
+	metricHttpTotalSuccessCount = promauto.NewCounter(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_http_total_success_count",
+			Help: "The total number of successful HTTP requests",
+		},
+	)
+	metricHttpTotalRequestCount = promauto.NewCounter(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_http_total_request_count",
+			Help: "The total number of HTTP requests sent",
+		},
+	)
+	metricHttpTotalCancelCount = promauto.NewCounter(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_http_total_cancel_count",
+			Help: "The total number of HTTP requests cancelled",
+		},
+	)
+	metricHttpSuccessCount = promauto.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_http_success_count",
+			Help: "The number of successful HTTP requests",
+		},
+		[]string{"url"},
+	)
+	metricHttpRequestCount = promauto.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_http_request_count",
+			Help: "The number of HTTP requests sent to the server",
+		},
+		[]string{"url"},
+	)
+	metricHttpCancelCount = promauto.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "jetkvm_timesync_http_cancel_count",
+			Help: "The number of HTTP requests cancelled",
+		},
+		[]string{"url"},
+	)
+	metricHttpServerLastRTT = promauto.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "jetkvm_timesync_http_server_last_rtt",
+			Help: "The last RTT of the HTTP server in milliseconds",
+		},
+		[]string{"url"},
+	)
+	metricHttpServerRttHistogram = promauto.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Name: "jetkvm_timesync_http_server_rtt",
+			Help: "The histogram of the RTT of the HTTP server in milliseconds",
+			Buckets: []float64{
+				10, 25, 50, 100, 200, 300, 500, 1000,
+			},
+		},
+		[]string{"url"},
+	)
+	metricHttpServerInfo = promauto.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "jetkvm_timesync_http_server_info",
+			Help: "The info of the HTTP server",
+		},
+		[]string{"url", "http_code"},
+	)
+)

internal/timesync/ntp.go

@@ -0,0 +1,113 @@
+package timesync
+
+import (
+	"math/rand/v2"
+	"strconv"
+	"time"
+
+	"github.com/beevik/ntp"
+)
+
+var defaultNTPServers = []string{
+	"time.apple.com",
+	"time.aws.com",
+	"time.windows.com",
+	"time.google.com",
+	"162.159.200.123", // time.cloudflare.com
+	"0.pool.ntp.org",
+	"1.pool.ntp.org",
+	"2.pool.ntp.org",
+	"3.pool.ntp.org",
+}
+
+func (t *TimeSync) queryNetworkTime() (now *time.Time, offset *time.Duration) {
+	chunkSize := 4
+	ntpServers := t.ntpServers
+
+	// shuffle the ntp servers to avoid always querying the same servers
+	rand.Shuffle(len(ntpServers), func(i, j int) { ntpServers[i], ntpServers[j] = ntpServers[j], ntpServers[i] })
+
+	for i := 0; i < len(ntpServers); i += chunkSize {
+		chunk := ntpServers[i:min(i+chunkSize, len(ntpServers))]
+		now, offset := t.queryMultipleNTP(chunk, timeSyncTimeout)
+		if now != nil {
+			return now, offset
+		}
+	}
+
+	return nil, nil
+}
+
+type ntpResult struct {
+	now    *time.Time
+	offset *time.Duration
+}
+
+func (t *TimeSync) queryMultipleNTP(servers []string, timeout time.Duration) (now *time.Time, offset *time.Duration) {
+	results := make(chan *ntpResult, len(servers))
+	for _, server := range servers {
+		go func(server string) {
+			scopedLogger := t.l.With().
+				Str("server", server).
+				Logger()
+
+			// increase request count
+			metricNtpTotalRequestCount.Inc()
+			metricNtpRequestCount.WithLabelValues(server).Inc()
+
+			// query the server
+			now, response, err := queryNtpServer(server, timeout)
+
+			// set the last RTT
+			metricNtpServerLastRTT.WithLabelValues(
+				server,
+			).Set(float64(response.RTT.Milliseconds()))
+
+			// set the RTT histogram
+			metricNtpServerRttHistogram.WithLabelValues(
+				server,
+			).Observe(float64(response.RTT.Milliseconds()))
+
+			// set the server info
+			metricNtpServerInfo.WithLabelValues(
+				server,
+				response.ReferenceString(),
+				strconv.Itoa(int(response.Stratum)),
+				strconv.Itoa(int(response.Precision)),
+			).Set(1)
+
+			if err == nil {
+				// increase success count
+				metricNtpTotalSuccessCount.Inc()
+				metricNtpSuccessCount.WithLabelValues(server).Inc()
+
+				scopedLogger.Info().
+					Str("time", now.Format(time.RFC3339)).
+					Str("reference", response.ReferenceString()).
+					Str("rtt", response.RTT.String()).
+					Str("clockOffset", response.ClockOffset.String()).
+					Uint8("stratum", response.Stratum).
+					Msg("NTP server returned time")
+				results <- &ntpResult{
+					now:    now,
+					offset: &response.ClockOffset,
+				}
+			} else {
+				scopedLogger.Warn().
+					Str("error", err.Error()).
+					Msg("failed to query NTP server")
+			}
+		}(server)
+	}
+
+	result := <-results
+	return result.now, result.offset
+}
+
+func queryNtpServer(server string, timeout time.Duration) (now *time.Time, response *ntp.Response, err error) {
+	resp, err := ntp.QueryWithOptions(server, ntp.QueryOptions{Timeout: timeout})
+	if err != nil {
+		return nil, nil, err
+	}
+	return &resp.Time, resp, nil
+}

internal/timesync/rtc.go

@@ -0,0 +1,26 @@
+package timesync
+
+import (
+	"fmt"
+	"os"
+)
+
+var (
+	rtcDeviceSearchPaths = []string{
+		"/dev/rtc",
+		"/dev/rtc0",
+		"/dev/rtc1",
+		"/dev/misc/rtc",
+		"/dev/misc/rtc0",
+		"/dev/misc/rtc1",
+	}
+)
+
+func getRtcDevicePath() (string, error) {
+	for _, path := range rtcDeviceSearchPaths {
+		if _, err := os.Stat(path); err == nil {
+			return path, nil
+		}
+	}
+	return "", fmt.Errorf("rtc device not found")
+}

internal/timesync/rtc_linux.go

@@ -0,0 +1,105 @@
+//go:build linux
+
+package timesync
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+func TimetoRtcTime(t time.Time) unix.RTCTime {
+	return unix.RTCTime{
+		Sec:   int32(t.Second()),
+		Min:   int32(t.Minute()),
+		Hour:  int32(t.Hour()),
+		Mday:  int32(t.Day()),
+		Mon:   int32(t.Month() - 1),
+		Year:  int32(t.Year() - 1900),
+		Wday:  int32(0),
+		Yday:  int32(0),
+		Isdst: int32(0),
+	}
+}
+
+func RtcTimetoTime(t unix.RTCTime) time.Time {
+	return time.Date(
+		int(t.Year)+1900,
+		time.Month(t.Mon+1),
+		int(t.Mday),
+		int(t.Hour),
+		int(t.Min),
+		int(t.Sec),
+		0,
+		time.UTC,
+	)
+}
+
+func (t *TimeSync) getRtcDevice() (*os.File, error) {
+	if t.rtcDevice == nil {
+		file, err := os.OpenFile(t.rtcDevicePath, os.O_RDWR, 0666)
+		if err != nil {
+			return nil, err
+		}
+		t.rtcDevice = file
+	}
+	return t.rtcDevice, nil
+}
+
+func (t *TimeSync) getRtcDeviceFd() (int, error) {
+	device, err := t.getRtcDevice()
+	if err != nil {
+		return 0, err
+	}
+	return int(device.Fd()), nil
+}
+
+// Read implements Read for the Linux RTC
+func (t *TimeSync) readRtcTime() (time.Time, error) {
+	fd, err := t.getRtcDeviceFd()
+	if err != nil {
+		return time.Time{}, fmt.Errorf("failed to get RTC device fd: %w", err)
+	}
+
+	rtcTime, err := unix.IoctlGetRTCTime(fd)
+	if err != nil {
+		return time.Time{}, fmt.Errorf("failed to get RTC time: %w", err)
+	}
+
+	date := RtcTimetoTime(*rtcTime)
+
+	return date, nil
+}
+
+// Set implements Set for the Linux RTC
+// ...
+// It might be not accurate as the time consumed by the system call is not taken into account
+// but it's good enough for our purposes
+func (t *TimeSync) setRtcTime(tu time.Time) error {
+	rt := TimetoRtcTime(tu)
+
+	fd, err := t.getRtcDeviceFd()
+	if err != nil {
+		return fmt.Errorf("failed to get RTC device fd: %w", err)
+	}
+
+	currentRtcTime, err := t.readRtcTime()
+	if err != nil {
+		return fmt.Errorf("failed to read RTC time: %w", err)
+	}
+
+	t.l.Info().
+		Interface("rtc_time", tu).
+		Str("offset", tu.Sub(currentRtcTime).String()).
+		Msg("set rtc time")
+
+	if err := unix.IoctlSetRTCTime(fd, &rt); err != nil {
+		return fmt.Errorf("failed to set RTC time: %w", err)
+	}
+
+	metricRTCUpdateCount.Inc()
+
+	return nil
+}

internal/timesync/rtc_notlinux.go

@@ -0,0 +1,16 @@
+//go:build !linux
+
+package timesync
+
+import (
+	"errors"
+	"time"
+)
+
+func (t *TimeSync) readRtcTime() (time.Time, error) {
+	return time.Now(), nil
+}
+
+func (t *TimeSync) setRtcTime(tu time.Time) error {
+	return errors.New("not supported")
+}

internal/timesync/timesync.go

@@ -0,0 +1,208 @@
+package timesync
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"sync"
+	"time"
+
+	"github.com/jetkvm/kvm/internal/network"
+	"github.com/rs/zerolog"
+)
+
+const (
+	timeSyncRetryStep     = 5 * time.Second
+	timeSyncRetryMaxInt   = 1 * time.Minute
+	timeSyncWaitNetChkInt = 100 * time.Millisecond
+	timeSyncWaitNetUpInt  = 3 * time.Second
+	timeSyncInterval      = 1 * time.Hour
+	timeSyncTimeout       = 2 * time.Second
+)
+
+var (
+	timeSyncRetryInterval = 0 * time.Second
+)
+
+type TimeSync struct {
+	syncLock *sync.Mutex
+	l        *zerolog.Logger
+
+	ntpServers    []string
+	httpUrls      []string
+	networkConfig *network.NetworkConfig
+
+	rtcDevicePath string
+	rtcDevice     *os.File //nolint:unused
+	rtcLock       *sync.Mutex
+
+	syncSuccess bool
+
+	preCheckFunc func() (bool, error)
+}
+
+type TimeSyncOptions struct {
+	PreCheckFunc  func() (bool, error)
+	Logger        *zerolog.Logger
+	NetworkConfig *network.NetworkConfig
+}
+
+type SyncMode struct {
+	Ntp             bool
+	Http            bool
+	Ordering        []string
+	NtpUseFallback  bool
+	HttpUseFallback bool
+}
+
+func NewTimeSync(opts *TimeSyncOptions) *TimeSync {
+	rtcDevice, err := getRtcDevicePath()
+	if err != nil {
+		opts.Logger.Error().Err(err).Msg("failed to get RTC device path")
+	} else {
+		opts.Logger.Info().Str("path", rtcDevice).Msg("RTC device found")
+	}
+
+	t := &TimeSync{
+		syncLock:      &sync.Mutex{},
+		l:             opts.Logger,
+		rtcDevicePath: rtcDevice,
+		rtcLock:       &sync.Mutex{},
+		preCheckFunc:  opts.PreCheckFunc,
+		ntpServers:    defaultNTPServers,
+		httpUrls:      defaultHTTPUrls,
+		networkConfig: opts.NetworkConfig,
+	}
+
+	if t.rtcDevicePath != "" {
+		rtcTime, _ := t.readRtcTime()
+		t.l.Info().Interface("rtc_time", rtcTime).Msg("read RTC time")
+	}
+
+	return t
+}
+
+func (t *TimeSync) getSyncMode() SyncMode {
+	syncMode := SyncMode{
+		NtpUseFallback:  true,
+		HttpUseFallback: true,
+	}
+	var syncModeString string
+
+	if t.networkConfig != nil {
+		syncModeString = t.networkConfig.TimeSyncMode.String
+		if t.networkConfig.TimeSyncDisableFallback.Bool {
+			syncMode.NtpUseFallback = false
+			syncMode.HttpUseFallback = false
+		}
+	}
+
+	switch syncModeString {
+	case "ntp_only":
+		syncMode.Ntp = true
+	case "http_only":
+		syncMode.Http = true
+	default:
+		syncMode.Ntp = true
+		syncMode.Http = true
+	}
+
+	return syncMode
+}
+
+func (t *TimeSync) doTimeSync() {
+	metricTimeSyncStatus.Set(0)
+	for {
+		if ok, err := t.preCheckFunc(); !ok {
+			if err != nil {
+				t.l.Error().Err(err).Msg("pre-check failed")
+			}
+			time.Sleep(timeSyncWaitNetChkInt)
+			continue
+		}
+
+		t.l.Info().Msg("syncing system time")
+		start := time.Now()
+		err := t.Sync()
+		if err != nil {
+			t.l.Error().Str("error", err.Error()).Msg("failed to sync system time")
+
+			// retry after a delay
+			timeSyncRetryInterval += timeSyncRetryStep
+			time.Sleep(timeSyncRetryInterval)
+			// reset the retry interval if it exceeds the max interval
+			if timeSyncRetryInterval > timeSyncRetryMaxInt {
+				timeSyncRetryInterval = 0
+			}
+
+			continue
+		}
+		t.syncSuccess = true
+		t.l.Info().Str("now", time.Now().Format(time.RFC3339)).
+			Str("time_taken", time.Since(start).String()).
+			Msg("time sync successful")
+
+		metricTimeSyncStatus.Set(1)
+
+		time.Sleep(timeSyncInterval) // after the first sync is done
+	}
+}
+
+func (t *TimeSync) Sync() error {
+	var (
+		now    *time.Time
+		offset *time.Duration
+	)
+
+	syncMode := t.getSyncMode()
+
+	metricTimeSyncCount.Inc()
+
+	if syncMode.Ntp {
+		now, offset = t.queryNetworkTime()
+	}
+
+	if syncMode.Http && now == nil {
+		now = t.queryAllHttpTime()
+	}
+
+	if now == nil {
+		return fmt.Errorf("failed to get time from any source")
+	}
+
+	if offset != nil {
+		newNow := time.Now().Add(*offset)
+		now = &newNow
+	}
+
+	err := t.setSystemTime(*now)
+	if err != nil {
+		return fmt.Errorf("failed to set system time: %w", err)
+	}
+
+	metricTimeSyncSuccessCount.Inc()
+
+	return nil
+}
+
+func (t *TimeSync) IsSyncSuccess() bool {
+	return t.syncSuccess
+}
+
+func (t *TimeSync) Start() {
+	go t.doTimeSync()
+}
+
+func (t *TimeSync) setSystemTime(now time.Time) error {
+	nowStr := now.Format("2006-01-02 15:04:05")
+	output, err := exec.Command("date", "-s", nowStr).CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("failed to run date -s: %w, %s", err, string(output))
+	}
+
+	if t.rtcDevicePath != "" {
+		return t.setRtcTime(now)
+	}
+
+	return nil
+}

internal/udhcpc/options.go

@@ -0,0 +1,12 @@
+package udhcpc
+
+func (u *DHCPClient) GetNtpServers() []string {
+	if u.lease == nil {
+		return nil
+	}
+	servers := make([]string, len(u.lease.NTPServers))
+	for i, server := range u.lease.NTPServers {
+		servers[i] = server.String()
+	}
+	return servers
+}

internal/udhcpc/parser.go

@@ -0,0 +1,186 @@
+package udhcpc
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"net"
+	"os"
+	"reflect"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type Lease struct {
+	// from https://udhcp.busybox.net/README.udhcpc
+	IPAddress         net.IP        `env:"ip" json:"ip"`                               // The obtained IP
+	Netmask           net.IP        `env:"subnet" json:"netmask"`                      // The assigned subnet mask
+	Broadcast         net.IP        `env:"broadcast" json:"broadcast"`                 // The broadcast address for this network
+	TTL               int           `env:"ipttl" json:"ttl,omitempty"`                 // The TTL to use for this network
+	MTU               int           `env:"mtu" json:"mtu,omitempty"`                   // The MTU to use for this network
+	HostName          string        `env:"hostname" json:"hostname,omitempty"`         // The assigned hostname
+	Domain            string        `env:"domain" json:"domain,omitempty"`             // The domain name of the network
+	BootPNextServer   net.IP        `env:"siaddr" json:"bootp_next_server,omitempty"`  // The bootp next server option
+	BootPServerName   string        `env:"sname" json:"bootp_server_name,omitempty"`   // The bootp server name option
+	BootPFile         string        `env:"boot_file" json:"bootp_file,omitempty"`      // The bootp boot file option
+	Timezone          string        `env:"timezone" json:"timezone,omitempty"`         // Offset in seconds from UTC
+	Routers           []net.IP      `env:"router" json:"routers,omitempty"`            // A list of routers
+	DNS               []net.IP      `env:"dns" json:"dns_servers,omitempty"`           // A list of DNS servers
+	NTPServers        []net.IP      `env:"ntpsrv" json:"ntp_servers,omitempty"`        // A list of NTP servers
+	LPRServers        []net.IP      `env:"lprsvr" json:"lpr_servers,omitempty"`        // A list of LPR servers
+	TimeServers       []net.IP      `env:"timesvr" json:"_time_servers,omitempty"`     // A list of time servers (obsolete)
+	IEN116NameServers []net.IP      `env:"namesvr" json:"_name_servers,omitempty"`     // A list of IEN 116 name servers (obsolete)
+	LogServers        []net.IP      `env:"logsvr" json:"_log_servers,omitempty"`       // A list of MIT-LCS UDP log servers (obsolete)
+	CookieServers     []net.IP      `env:"cookiesvr" json:"_cookie_servers,omitempty"` // A list of RFC 865 cookie servers (obsolete)
+	WINSServers       []net.IP      `env:"wins" json:"_wins_servers,omitempty"`        // A list of WINS servers
+	SwapServer        net.IP        `env:"swapsvr" json:"_swap_server,omitempty"`      // The IP address of the client's swap server
+	BootSize          int           `env:"bootsize" json:"bootsize,omitempty"`         // The length in 512 octect blocks of the bootfile
+	RootPath          string        `env:"rootpath" json:"root_path,omitempty"`        // The path name of the client's root disk
+	LeaseTime         time.Duration `env:"lease" json:"lease,omitempty"`               // The lease time, in seconds
+	DHCPType          string        `env:"dhcptype" json:"dhcp_type,omitempty"`        // DHCP message type (safely ignored)
+	ServerID          string        `env:"serverid" json:"server_id,omitempty"`        // The IP of the server
+	Message           string        `env:"message" json:"reason,omitempty"`            // Reason for a DHCPNAK
+	TFTPServerName    string        `env:"tftp" json:"tftp,omitempty"`                 // The TFTP server name
+	BootFileName      string        `env:"bootfile" json:"bootfile,omitempty"`         // The boot file name
+	Uptime            time.Duration `env:"uptime" json:"uptime,omitempty"`             // The uptime of the device when the lease was obtained, in seconds
+	LeaseExpiry       *time.Time    `json:"lease_expiry,omitempty"`                    // The expiry time of the lease
+	isEmpty           map[string]bool
+}
+
+func (l *Lease) setIsEmpty(m map[string]bool) {
+	l.isEmpty = m
+}
+
+func (l *Lease) IsEmpty(key string) bool {
+	return l.isEmpty[key]
+}
+
+func (l *Lease) ToJSON() string {
+	json, err := json.Marshal(l)
+	if err != nil {
+		return ""
+	}
+	return string(json)
+}
+
+func (l *Lease) SetLeaseExpiry() (time.Time, error) {
+	if l.Uptime == 0 || l.LeaseTime == 0 {
+		return time.Time{}, fmt.Errorf("uptime or lease time isn't set")
+	}
+
+	// get the uptime of the device
+
+	file, err := os.Open("/proc/uptime")
+	if err != nil {
+		return time.Time{}, fmt.Errorf("failed to open uptime file: %w", err)
+	}
+	defer file.Close()
+
+	var uptime time.Duration
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		text := scanner.Text()
+		parts := strings.Split(text, " ")
+		uptime, err = time.ParseDuration(parts[0] + "s")
+
+		if err != nil {
+			return time.Time{}, fmt.Errorf("failed to parse uptime: %w", err)
+		}
+	}
+
+	relativeLeaseRemaining := (l.Uptime + l.LeaseTime) - uptime
+	leaseExpiry := time.Now().Add(relativeLeaseRemaining)
+
+	l.LeaseExpiry = &leaseExpiry
+
+	return leaseExpiry, nil
+}
+
+func UnmarshalDHCPCLease(lease *Lease, str string) error {
+	// parse the lease file as a map
+	data := make(map[string]string)
+	for _, line := range strings.Split(str, "\n") {
+		line = strings.TrimSpace(line)
+		// skip empty lines and comments
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		parts := strings.SplitN(line, "=", 2)
+		if len(parts) != 2 {
+			continue
+		}
+
+		key := strings.TrimSpace(parts[0])
+		value := strings.TrimSpace(parts[1])
+
+		data[key] = value
+	}
+
+	// now iterate over the lease struct and set the values
+	leaseType := reflect.TypeOf(lease).Elem()
+	leaseValue := reflect.ValueOf(lease).Elem()
+
+	valuesParsed := make(map[string]bool)
+
+	for i := 0; i < leaseType.NumField(); i++ {
+		field := leaseValue.Field(i)
+
+		// get the env tag
+		key := leaseType.Field(i).Tag.Get("env")
+		if key == "" {
+			continue
+		}
+
+		valuesParsed[key] = false
+
+		// get the value from the data map
+		value, ok := data[key]
+		if !ok || value == "" {
+			continue
+		}
+
+		switch field.Interface().(type) {
+		case string:
+			field.SetString(value)
+		case int:
+			val, err := strconv.Atoi(value)
+			if err != nil {
+				continue
+			}
+			field.SetInt(int64(val))
+		case time.Duration:
+			val, err := time.ParseDuration(value + "s")
+			if err != nil {
+				continue
+			}
+			field.Set(reflect.ValueOf(val))
+		case net.IP:
+			ip := net.ParseIP(value)
+			if ip == nil {
+				continue
+			}
+			field.Set(reflect.ValueOf(ip))
+		case []net.IP:
+			val := make([]net.IP, 0)
+			for _, ipStr := range strings.Fields(value) {
+				ip := net.ParseIP(ipStr)
+				if ip == nil {
+					continue
+				}
+				val = append(val, ip)
+			}
+			field.Set(reflect.ValueOf(val))
+		default:
+			return fmt.Errorf("unsupported field `%s` type: %s", key, field.Type().String())
+		}
+
+		valuesParsed[key] = true
+	}
+
+	lease.setIsEmpty(valuesParsed)
+
+	return nil
+}

internal/udhcpc/parser_test.go

@@ -0,0 +1,74 @@
+package udhcpc
+
+import (
+	"testing"
+	"time"
+)
+
+func TestUnmarshalDHCPCLease(t *testing.T) {
+	lease := &Lease{}
+	err := UnmarshalDHCPCLease(lease, `
+# generated @ Mon Jan  4 19:31:53 UTC 2021
+#  19:31:53 up 0 min,  0 users,  load average: 0.72, 0.14, 0.04
+# the date might be inaccurate if the clock is not set
+ip=192.168.0.240
+siaddr=192.168.0.1
+sname=
+boot_file=
+subnet=255.255.255.0
+timezone=
+router=192.168.0.1
+timesvr=
+namesvr=
+dns=172.19.53.2
+logsvr=
+cookiesvr=
+lprsvr=
+hostname=
+bootsize=
+domain=
+swapsvr=
+rootpath=
+ipttl=
+mtu=
+broadcast=
+ntpsrv=162.159.200.123
+wins=
+lease=172800
+dhcptype=
+serverid=192.168.0.1
+message=
+tftp=
+bootfile=
+	`)
+	if lease.IPAddress.String() != "192.168.0.240" {
+		t.Fatalf("expected ip to be 192.168.0.240, got %s", lease.IPAddress.String())
+	}
+	if lease.Netmask.String() != "255.255.255.0" {
+		t.Fatalf("expected netmask to be 255.255.255.0, got %s", lease.Netmask.String())
+	}
+	if len(lease.Routers) != 1 {
+		t.Fatalf("expected 1 router, got %d", len(lease.Routers))
+	}
+	if lease.Routers[0].String() != "192.168.0.1" {
+		t.Fatalf("expected router to be 192.168.0.1, got %s", lease.Routers[0].String())
+	}
+	if len(lease.NTPServers) != 1 {
+		t.Fatalf("expected 1 timeserver, got %d", len(lease.NTPServers))
+	}
+	if lease.NTPServers[0].String() != "162.159.200.123" {
+		t.Fatalf("expected timeserver to be 162.159.200.123, got %s", lease.NTPServers[0].String())
+	}
+	if len(lease.DNS) != 1 {
+		t.Fatalf("expected 1 dns, got %d", len(lease.DNS))
+	}
+	if lease.DNS[0].String() != "172.19.53.2" {
+		t.Fatalf("expected dns to be 172.19.53.2, got %s", lease.DNS[0].String())
+	}
+	if lease.LeaseTime != 172800*time.Second {
+		t.Fatalf("expected lease time to be 172800 seconds, got %d", lease.LeaseTime)
+	}
+	if err != nil {
+		t.Fatal(err)
+	}
+}

internal/udhcpc/proc.go

@@ -0,0 +1,212 @@
+package udhcpc
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"syscall"
+)
+
+func readFileNoStat(filename string) ([]byte, error) {
+	const maxBufferSize = 1024 * 1024
+
+	f, err := os.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	reader := io.LimitReader(f, maxBufferSize)
+	return io.ReadAll(reader)
+}
+
+func toCmdline(path string) ([]string, error) {
+	data, err := readFileNoStat(path)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(data) < 1 {
+		return []string{}, nil
+	}
+
+	return strings.Split(string(bytes.TrimRight(data, "\x00")), "\x00"), nil
+}
+
+func (p *DHCPClient) findUdhcpcProcess() (int, error) {
+	// read procfs for udhcpc processes
+	// we do not use procfs.AllProcs() because we want to avoid the overhead of reading the entire procfs
+	processes, err := os.ReadDir("/proc")
+	if err != nil {
+		return 0, err
+	}
+
+	// iterate over the processes
+	for _, d := range processes {
+		// check if file is numeric
+		pid, err := strconv.Atoi(d.Name())
+		if err != nil {
+			continue
+		}
+
+		// check if it's a directory
+		if !d.IsDir() {
+			continue
+		}
+
+		cmdline, err := toCmdline(filepath.Join("/proc", d.Name(), "cmdline"))
+		if err != nil {
+			continue
+		}
+
+		if len(cmdline) < 1 {
+			continue
+		}
+
+		if cmdline[0] != "udhcpc" {
+			continue
+		}
+
+		cmdlineText := strings.Join(cmdline, " ")
+
+		// check if it's a udhcpc process
+		if strings.Contains(cmdlineText, fmt.Sprintf("-i %s", p.InterfaceName)) {
+			p.logger.Debug().
+				Str("pid", d.Name()).
+				Interface("cmdline", cmdline).
+				Msg("found udhcpc process")
+			return pid, nil
+		}
+	}
+
+	return 0, errors.New("udhcpc process not found")
+}
+
+func (c *DHCPClient) getProcessPid() (int, error) {
+	var pid int
+	if c.pidFile != "" {
+		// try to read the pid file
+		pidHandle, err := os.ReadFile(c.pidFile)
+		if err != nil {
+			c.logger.Warn().Err(err).
+				Str("pidFile", c.pidFile).Msg("failed to read udhcpc pid file")
+		}
+
+		// if it exists, try to read the pid
+		if pidHandle != nil {
+			pidFromFile, err := strconv.Atoi(string(pidHandle))
+			if err != nil {
+				c.logger.Warn().Err(err).
+					Str("pidFile", c.pidFile).Msg("failed to convert pid file to int")
+			}
+			pid = pidFromFile
+		}
+	}
+
+	// if the pid is 0, try to find the pid using procfs
+	if pid == 0 {
+		newPid, err := c.findUdhcpcProcess()
+		if err != nil {
+			return 0, err
+		}
+		pid = newPid
+	}
+
+	return pid, nil
+}
+
+func (c *DHCPClient) getProcess() *os.Process {
+	pid, err := c.getProcessPid()
+	if err != nil {
+		return nil
+	}
+
+	process, err := os.FindProcess(pid)
+	if err != nil {
+		c.logger.Warn().Err(err).
+			Int("pid", pid).Msg("failed to find process")
+		return nil
+	}
+
+	return process
+}
+
+func (c *DHCPClient) GetProcess() *os.Process {
+	if c.process == nil {
+		process := c.getProcess()
+		if process == nil {
+			return nil
+		}
+		c.process = process
+	}
+
+	err := c.process.Signal(syscall.Signal(0))
+	if err != nil && errors.Is(err, os.ErrProcessDone) {
+		oldPid := c.process.Pid
+
+		c.process = nil
+		c.process = c.getProcess()
+		if c.process == nil {
+			c.logger.Error().Msg("failed to find new udhcpc process")
+			return nil
+		}
+		c.logger.Warn().
+			Int("oldPid", oldPid).
+			Int("newPid", c.process.Pid).
+			Msg("udhcpc process pid changed")
+	} else if err != nil {
+		c.logger.Warn().Err(err).
+			Int("pid", c.process.Pid).Msg("udhcpc process is not running")
+	}
+
+	return c.process
+}
+
+func (c *DHCPClient) KillProcess() error {
+	process := c.GetProcess()
+	if process == nil {
+		return nil
+	}
+
+	return process.Kill()
+}
+
+func (c *DHCPClient) ReleaseProcess() error {
+	process := c.GetProcess()
+	if process == nil {
+		return nil
+	}
+
+	return process.Release()
+}
+
+func (c *DHCPClient) signalProcess(sig syscall.Signal) error {
+	process := c.GetProcess()
+	if process == nil {
+		return nil
+	}
+
+	s := process.Signal(sig)
+	if s != nil {
+		c.logger.Warn().Err(s).
+			Int("pid", process.Pid).
+			Str("signal", sig.String()).
+			Msg("failed to signal udhcpc process")
+		return s
+	}
+
+	return nil
+}
+
+func (c *DHCPClient) Renew() error {
+	return c.signalProcess(syscall.SIGUSR1)
+}
+
+func (c *DHCPClient) Release() error {
+	return c.signalProcess(syscall.SIGUSR2)
+}

internal/udhcpc/udhcpc.go

@@ -0,0 +1,191 @@
+package udhcpc
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/fsnotify/fsnotify"
+	"github.com/rs/zerolog"
+)
+
+const (
+	DHCPLeaseFile = "/run/udhcpc.%s.info"
+	DHCPPidFile   = "/run/udhcpc.%s.pid"
+)
+
+type DHCPClient struct {
+	InterfaceName string
+	leaseFile     string
+	pidFile       string
+	lease         *Lease
+	logger        *zerolog.Logger
+	process       *os.Process
+	onLeaseChange func(lease *Lease)
+}
+
+type DHCPClientOptions struct {
+	InterfaceName string
+	PidFile       string
+	Logger        *zerolog.Logger
+	OnLeaseChange func(lease *Lease)
+}
+
+var defaultLogger = zerolog.New(os.Stdout).Level(zerolog.InfoLevel)
+
+func NewDHCPClient(options *DHCPClientOptions) *DHCPClient {
+	if options.Logger == nil {
+		options.Logger = &defaultLogger
+	}
+
+	l := options.Logger.With().Str("interface", options.InterfaceName).Logger()
+	return &DHCPClient{
+		InterfaceName: options.InterfaceName,
+		logger:        &l,
+		leaseFile:     fmt.Sprintf(DHCPLeaseFile, options.InterfaceName),
+		pidFile:       options.PidFile,
+		onLeaseChange: options.OnLeaseChange,
+	}
+}
+
+func (c *DHCPClient) getWatchPaths() []string {
+	watchPaths := make(map[string]interface{})
+	watchPaths[filepath.Dir(c.leaseFile)] = nil
+
+	if c.pidFile != "" {
+		watchPaths[filepath.Dir(c.pidFile)] = nil
+	}
+
+	paths := make([]string, 0)
+	for path := range watchPaths {
+		paths = append(paths, path)
+	}
+	return paths
+}
+
+// Run starts the DHCP client and watches the lease file for changes.
+// this isn't a blocking call, and the lease file is reloaded when a change is detected.
+func (c *DHCPClient) Run() error {
+	err := c.loadLeaseFile()
+	if err != nil && !errors.Is(err, os.ErrNotExist) {
+		return err
+	}
+
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		return err
+	}
+	defer watcher.Close()
+
+	go func() {
+		for {
+			select {
+			case event, ok := <-watcher.Events:
+				if !ok {
+					continue
+				}
+				if !event.Has(fsnotify.Write) && !event.Has(fsnotify.Create) {
+					continue
+				}
+
+				if event.Name == c.leaseFile {
+					c.logger.Debug().
+						Str("event", event.Op.String()).
+						Str("path", event.Name).
+						Msg("udhcpc lease file updated, reloading lease")
+					_ = c.loadLeaseFile()
+				}
+			case err, ok := <-watcher.Errors:
+				if !ok {
+					return
+				}
+				c.logger.Error().Err(err).Msg("error watching lease file")
+			}
+		}
+	}()
+
+	for _, path := range c.getWatchPaths() {
+		err = watcher.Add(path)
+		if err != nil {
+			c.logger.Error().
+				Err(err).
+				Str("path", path).
+				Msg("failed to watch directory")
+			return err
+		}
+	}
+
+	// TODO: update udhcpc pid file
+	// we'll comment this out for now because the pid might change
+	// process := c.GetProcess()
+	// if process == nil {
+	// 	c.logger.Error().Msg("udhcpc process not found")
+	// }
+
+	// block the goroutine until the lease file is updated
+	<-make(chan struct{})
+
+	return nil
+}
+
+func (c *DHCPClient) loadLeaseFile() error {
+	file, err := os.ReadFile(c.leaseFile)
+	if err != nil {
+		return err
+	}
+
+	data := string(file)
+	if data == "" {
+		c.logger.Debug().Msg("udhcpc lease file is empty")
+		return nil
+	}
+
+	lease := &Lease{}
+	err = UnmarshalDHCPCLease(lease, string(file))
+	if err != nil {
+		return err
+	}
+
+	isFirstLoad := c.lease == nil
+	c.lease = lease
+
+	if lease.IPAddress == nil {
+		c.logger.Info().
+			Interface("lease", lease).
+			Str("data", string(file)).
+			Msg("udhcpc lease cleared")
+		return nil
+	}
+
+	msg := "udhcpc lease updated"
+	if isFirstLoad {
+		msg = "udhcpc lease loaded"
+	}
+
+	leaseExpiry, err := lease.SetLeaseExpiry()
+	if err != nil {
+		c.logger.Error().Err(err).Msg("failed to get dhcp lease expiry")
+	} else {
+		expiresIn := time.Until(leaseExpiry)
+		c.logger.Info().
+			Interface("expiry", leaseExpiry).
+			Str("expiresIn", expiresIn.String()).
+			Msg("current dhcp lease expiry time calculated")
+	}
+
+	c.onLeaseChange(lease)
+
+	c.logger.Info().
+		Str("ip", lease.IPAddress.String()).
+		Str("leaseTime", lease.LeaseTime.String()).
+		Interface("data", lease).
+		Msg(msg)
+
+	return nil
+}
+
+func (c *DHCPClient) GetLease() *Lease {
+	return c.lease
+}

internal/websecure/store.go

@@ -96,7 +96,11 @@ func (s *CertStore) loadCertificate(hostname string) {
 
 	s.certificates[hostname] = &cert
 
-	s.log.Info().Str("hostname", hostname).Msg("Loaded certificate")
+	if hostname == selfSignerCAMagicName {
+		s.log.Info().Msg("loaded CA certificate")
+	} else {
+		s.log.Info().Str("hostname", hostname).Msg("loaded certificate")
+	}
 }
 
 // GetCertificate returns the certificate for the given hostname
@@ -131,7 +135,7 @@ func (s *CertStore) ValidateAndSaveCertificate(hostname string, cert string, key
 			if !ignoreWarning {
 				return nil, fmt.Errorf("certificate does not match hostname: %w", err)
 			}
-			s.log.Warn().Err(err).Msg("Certificate does not match hostname")
+			s.log.Warn().Err(err).Msg("certificate does not match hostname")
 		}
 	}
 

jsonrpc.go

@@ -962,6 +962,10 @@ var rpcHandlers = map[string]RPCHandler{
 	"getDeviceID":            {Func: rpcGetDeviceID},
 	"deregisterDevice":       {Func: rpcDeregisterDevice},
 	"getCloudState":          {Func: rpcGetCloudState},
+	"getNetworkState":        {Func: rpcGetNetworkState},
+	"getNetworkSettings":     {Func: rpcGetNetworkSettings},
+	"setNetworkSettings":     {Func: rpcSetNetworkSettings, Params: []string{"settings"}},
+	"renewDHCPLease":         {Func: rpcRenewDHCPLease},
 	"keyboardReport":         {Func: rpcKeyboardReport, Params: []string{"modifier", "keys"}},
 	"absMouseReport":         {Func: rpcAbsMouseReport, Params: []string{"x", "y", "buttons"}},
 	"relMouseReport":         {Func: rpcRelMouseReport, Params: []string{"dx", "dy", "buttons"}},

log.go

@@ -1,291 +1,32 @@
 package kvm
 
 import (
-	"fmt"
+	"github.com/jetkvm/kvm/internal/logging"
-	"io"
-	"os"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/pion/logging"
 	"github.com/rs/zerolog"
 )
 
-type Logger struct {
-	l               *zerolog.Logger
-	scopeLoggers    map[string]*zerolog.Logger
-	scopeLevels     map[string]zerolog.Level
-	scopeLevelMutex sync.Mutex
-
-	defaultLogLevelFromEnv    zerolog.Level
-	defaultLogLevelFromConfig zerolog.Level
-	defaultLogLevel           zerolog.Level
-}
-
-const (
-	defaultLogLevel = zerolog.ErrorLevel
-)
-
-type logOutput struct {
-	mu *sync.Mutex
-}
-
-func (w *logOutput) Write(p []byte) (n int, err error) {
-	w.mu.Lock()
-	defer w.mu.Unlock()
-
-	// TODO: write to file or syslog
-
-	return len(p), nil
-}
-
-var (
-	consoleLogOutput io.Writer = zerolog.ConsoleWriter{
-		Out:           os.Stdout,
-		TimeFormat:    time.RFC3339,
-		PartsOrder:    []string{"time", "level", "scope", "component", "message"},
-		FieldsExclude: []string{"scope", "component"},
-		FormatPartValueByName: func(value interface{}, name string) string {
-			val := fmt.Sprintf("%s", value)
-			if name == "component" {
-				if value == nil {
-					return "-"
-				}
-			}
-			return val
-		},
-	}
-	fileLogOutput    io.Writer = &logOutput{mu: &sync.Mutex{}}
-	defaultLogOutput           = zerolog.MultiLevelWriter(consoleLogOutput, fileLogOutput)
-
-	zerologLevels = map[string]zerolog.Level{
-		"DISABLE": zerolog.Disabled,
-		"NOLEVEL": zerolog.NoLevel,
-		"PANIC":   zerolog.PanicLevel,
-		"FATAL":   zerolog.FatalLevel,
-		"ERROR":   zerolog.ErrorLevel,
-		"WARN":    zerolog.WarnLevel,
-		"INFO":    zerolog.InfoLevel,
-		"DEBUG":   zerolog.DebugLevel,
-		"TRACE":   zerolog.TraceLevel,
-	}
-
-	rootZerologLogger = zerolog.New(defaultLogOutput).With().
-				Str("scope", "jetkvm").
-				Timestamp().
-				Stack().
-				Logger()
-	rootLogger = NewLogger(rootZerologLogger)
-)
-
-func NewLogger(zerologLogger zerolog.Logger) *Logger {
-	return &Logger{
-		l:                         &zerologLogger,
-		scopeLoggers:              make(map[string]*zerolog.Logger),
-		scopeLevels:               make(map[string]zerolog.Level),
-		scopeLevelMutex:           sync.Mutex{},
-		defaultLogLevelFromEnv:    -2,
-		defaultLogLevelFromConfig: -2,
-		defaultLogLevel:           defaultLogLevel,
-	}
-}
-
-func (l *Logger) updateLogLevel() {
-	l.scopeLevelMutex.Lock()
-	defer l.scopeLevelMutex.Unlock()
-
-	l.scopeLevels = make(map[string]zerolog.Level)
-
-	finalDefaultLogLevel := l.defaultLogLevel
-
-	for name, level := range zerologLevels {
-		env := os.Getenv(fmt.Sprintf("JETKVM_LOG_%s", name))
-
-		if env == "" {
-			env = os.Getenv(fmt.Sprintf("PION_LOG_%s", name))
-		}
-
-		if env == "" {
-			env = os.Getenv(fmt.Sprintf("PIONS_LOG_%s", name))
-		}
-
-		if env == "" {
-			continue
-		}
-
-		if strings.ToLower(env) == "all" {
-			l.defaultLogLevelFromEnv = level
-
-			if finalDefaultLogLevel > level {
-				finalDefaultLogLevel = level
-			}
-
-			continue
-		}
-
-		scopes := strings.Split(strings.ToLower(env), ",")
-		for _, scope := range scopes {
-			l.scopeLevels[scope] = level
-		}
-	}
-
-	l.defaultLogLevel = finalDefaultLogLevel
-}
-
-func (l *Logger) getScopeLoggerLevel(scope string) zerolog.Level {
-	if l.scopeLevels == nil {
-		l.updateLogLevel()
-	}
-
-	var scopeLevel zerolog.Level
-	if l.defaultLogLevelFromConfig != -2 {
-		scopeLevel = l.defaultLogLevelFromConfig
-	}
-	if l.defaultLogLevelFromEnv != -2 {
-		scopeLevel = l.defaultLogLevelFromEnv
-	}
-
-	// if the scope is not in the map, use the default level from the root logger
-	if level, ok := l.scopeLevels[scope]; ok {
-		scopeLevel = level
-	}
-
-	return scopeLevel
-}
-
-func (l *Logger) newScopeLogger(scope string) zerolog.Logger {
-	scopeLevel := l.getScopeLoggerLevel(scope)
-	logger := l.l.Level(scopeLevel).With().Str("component", scope).Logger()
-
-	return logger
-}
-
-func (l *Logger) getLogger(scope string) *zerolog.Logger {
-	logger, ok := l.scopeLoggers[scope]
-	if !ok || logger == nil {
-		scopeLogger := l.newScopeLogger(scope)
-		l.scopeLoggers[scope] = &scopeLogger
-	}
-
-	return l.scopeLoggers[scope]
-}
-
-func (l *Logger) UpdateLogLevel() {
-	needUpdate := false
-
-	if config != nil && config.DefaultLogLevel != "" {
-		if logLevel, ok := zerologLevels[config.DefaultLogLevel]; ok {
-			l.defaultLogLevelFromConfig = logLevel
-		} else {
-			l.l.Warn().Str("logLevel", config.DefaultLogLevel).Msg("invalid defaultLogLevel from config, using ERROR")
-		}
-
-		if l.defaultLogLevelFromConfig != l.defaultLogLevel {
-			needUpdate = true
-		}
-	}
-
-	l.updateLogLevel()
-
-	if needUpdate {
-		for scope, logger := range l.scopeLoggers {
-			currentLevel := logger.GetLevel()
-			targetLevel := l.getScopeLoggerLevel(scope)
-			if currentLevel != targetLevel {
-				*logger = l.newScopeLogger(scope)
-			}
-		}
-	}
-}
-
 func ErrorfL(l *zerolog.Logger, format string, err error, args ...interface{}) error {
-	if l == nil {
+	return logging.ErrorfL(l, format, err, args...)
-		l = rootLogger.getLogger("jetkvm")
-	}
-
-	l.Error().Err(err).Msgf(format, args...)
-
-	if err == nil {
-		return fmt.Errorf(format, args...)
-	}
-
-	err_msg := err.Error() + ": %v"
-	err_args := append(args, err)
-
-	return fmt.Errorf(err_msg, err_args...)
 }
 
 var (
-	logger          = rootLogger.getLogger("jetkvm")
+	logger          = logging.GetSubsystemLogger("jetkvm")
-	cloudLogger     = rootLogger.getLogger("cloud")
+	networkLogger   = logging.GetSubsystemLogger("network")
-	websocketLogger = rootLogger.getLogger("websocket")
+	cloudLogger     = logging.GetSubsystemLogger("cloud")
-	webrtcLogger    = rootLogger.getLogger("webrtc")
+	websocketLogger = logging.GetSubsystemLogger("websocket")
-	nativeLogger    = rootLogger.getLogger("native")
+	webrtcLogger    = logging.GetSubsystemLogger("webrtc")
-	nbdLogger       = rootLogger.getLogger("nbd")
+	nativeLogger    = logging.GetSubsystemLogger("native")
-	ntpLogger       = rootLogger.getLogger("ntp")
+	nbdLogger       = logging.GetSubsystemLogger("nbd")
-	jsonRpcLogger   = rootLogger.getLogger("jsonrpc")
+	timesyncLogger  = logging.GetSubsystemLogger("timesync")
-	watchdogLogger  = rootLogger.getLogger("watchdog")
+	jsonRpcLogger   = logging.GetSubsystemLogger("jsonrpc")
-	websecureLogger = rootLogger.getLogger("websecure")
+	watchdogLogger  = logging.GetSubsystemLogger("watchdog")
-	otaLogger       = rootLogger.getLogger("ota")
+	websecureLogger = logging.GetSubsystemLogger("websecure")
-	serialLogger    = rootLogger.getLogger("serial")
+	otaLogger       = logging.GetSubsystemLogger("ota")
-	terminalLogger  = rootLogger.getLogger("terminal")
+	serialLogger    = logging.GetSubsystemLogger("serial")
-	displayLogger   = rootLogger.getLogger("display")
+	terminalLogger  = logging.GetSubsystemLogger("terminal")
-	wolLogger       = rootLogger.getLogger("wol")
+	displayLogger   = logging.GetSubsystemLogger("display")
-	usbLogger       = rootLogger.getLogger("usb")
+	wolLogger       = logging.GetSubsystemLogger("wol")
+	usbLogger       = logging.GetSubsystemLogger("usb")
 	// external components
-	ginLogger = rootLogger.getLogger("gin")
+	ginLogger = logging.GetSubsystemLogger("gin")
 )
-
-type pionLogger struct {
-	logger *zerolog.Logger
-}
-
-// Print all messages except trace.
-func (c pionLogger) Trace(msg string) {
-	c.logger.Trace().Msg(msg)
-}
-func (c pionLogger) Tracef(format string, args ...interface{}) {
-	c.logger.Trace().Msgf(format, args...)
-}
-
-func (c pionLogger) Debug(msg string) {
-	c.logger.Debug().Msg(msg)
-}
-func (c pionLogger) Debugf(format string, args ...interface{}) {
-	c.logger.Debug().Msgf(format, args...)
-}
-func (c pionLogger) Info(msg string) {
-	c.logger.Info().Msg(msg)
-}
-func (c pionLogger) Infof(format string, args ...interface{}) {
-	c.logger.Info().Msgf(format, args...)
-}
-func (c pionLogger) Warn(msg string) {
-	c.logger.Warn().Msg(msg)
-}
-func (c pionLogger) Warnf(format string, args ...interface{}) {
-	c.logger.Warn().Msgf(format, args...)
-}
-func (c pionLogger) Error(msg string) {
-	c.logger.Error().Msg(msg)
-}
-func (c pionLogger) Errorf(format string, args ...interface{}) {
-	c.logger.Error().Msgf(format, args...)
-}
-
-// customLoggerFactory satisfies the interface logging.LoggerFactory
-// This allows us to create different loggers per subsystem. So we can
-// add custom behavior.
-type pionLoggerFactory struct{}
-
-func (c pionLoggerFactory) NewLogger(subsystem string) logging.LeveledLogger {
-	logger := rootLogger.getLogger(subsystem).With().
-		Str("scope", "pion").
-		Str("component", subsystem).
-		Logger()
-
-	return pionLogger{logger: &logger}
-}
-
-var defaultLoggerFactory = &pionLoggerFactory{}

main.go

@@ -15,28 +15,54 @@ var appCtx context.Context
 
 func Main() {
 	LoadConfig()
-	logger.Debug().Msg("config loaded")
 
 	var cancel context.CancelFunc
 	appCtx, cancel = context.WithCancel(context.Background())
 	defer cancel()
-	logger.Info().Msg("starting JetKvm")
+
+	systemVersionLocal, appVersionLocal, err := GetLocalVersion()
+	if err != nil {
+		logger.Warn().Err(err).Msg("failed to get local version")
+	}
+
+	logger.Info().
+		Interface("system_version", systemVersionLocal).
+		Interface("app_version", appVersionLocal).
+		Msg("starting JetKVM")
 
 	go runWatchdog()
 	go confirmCurrentSystem()
 
 	http.DefaultClient.Timeout = 1 * time.Minute
 
-	err := rootcerts.UpdateDefaultTransport()
+	err = rootcerts.UpdateDefaultTransport()
 	if err != nil {
-		logger.Warn().Err(err).Msg("failed to load CA certs")
+		logger.Warn().Err(err).Msg("failed to load Root CA certificates")
+	}
+	logger.Info().
+		Int("ca_certs_loaded", len(rootcerts.Certs())).
+		Msg("loaded Root CA certificates")
+
+	// Initialize network
+	if err := initNetwork(); err != nil {
+		logger.Error().Err(err).Msg("failed to initialize network")
+		os.Exit(1)
 	}
 
-	initNetwork()
+	// Initialize time sync
+	initTimeSync()
+	timeSync.Start()
 
-	go TimeSyncLoop()
+	// Initialize mDNS
+	if err := initMdns(); err != nil {
+		logger.Error().Err(err).Msg("failed to initialize mDNS")
+		os.Exit(1)
+	}
 
+	// Initialize native ctrl socket server
 	StartNativeCtrlSocketServer()
+
+	// Initialize native video socket server
 	StartNativeVideoSocketServer()
 
 	initPrometheus()

mdns.go

@@ -0,0 +1,29 @@
+package kvm
+
+import (
+	"github.com/jetkvm/kvm/internal/mdns"
+)
+
+var mDNS *mdns.MDNS
+
+func initMdns() error {
+	m, err := mdns.NewMDNS(&mdns.MDNSOptions{
+		Logger: logger,
+		LocalNames: []string{
+			networkState.GetHostname(),
+			networkState.GetFQDN(),
+		},
+		ListenOptions: &mdns.MDNSListenOptions{
+			IPv4: true,
+			IPv6: true,
+		},
+	})
+	if err != nil {
+		return err
+	}
+
+	// do not start the server yet, as we need to wait for the network state to be set
+	mDNS = m
+
+	return nil
+}

native.go

@@ -8,13 +8,10 @@ import (
 	"io"
 	"net"
 	"os"
-	"os/exec"
 	"sync"
-	"syscall"
 	"time"
 
 	"github.com/jetkvm/kvm/resource"
-	"github.com/rs/zerolog"
 
 	"github.com/pion/webrtc/v4/pkg/media"
 )
@@ -36,19 +33,6 @@ type CtrlResponse struct {
 	Data   json.RawMessage        `json:"data,omitempty"`
 }
 
-type nativeOutput struct {
-	mu     *sync.Mutex
-	logger *zerolog.Event
-}
-
-func (w *nativeOutput) Write(p []byte) (n int, err error) {
-	w.mu.Lock()
-	defer w.mu.Unlock()
-
-	w.logger.Msg(string(p))
-	return len(p), nil
-}
-
 type EventHandler func(event CtrlResponse)
 
 var seq int32 = 1
@@ -262,30 +246,8 @@ func ExtractAndRunNativeBin() error {
 		return fmt.Errorf("failed to make binary executable: %w", err)
 	}
 	// Run the binary in the background
-	cmd := exec.Command(binaryPath)
+	cmd, err := startNativeBinary(binaryPath)
-
+	if err != nil {
-	nativeOutputLock := sync.Mutex{}
-	nativeStdout := &nativeOutput{
-		mu:     &nativeOutputLock,
-		logger: nativeLogger.Info().Str("pipe", "stdout"),
-	}
-	nativeStderr := &nativeOutput{
-		mu:     &nativeOutputLock,
-		logger: nativeLogger.Info().Str("pipe", "stderr"),
-	}
-
-	// Redirect stdout and stderr to the current process
-	cmd.Stdout = nativeStdout
-	cmd.Stderr = nativeStderr
-
-	// Set the process group ID so we can kill the process and its children when this process exits
-	cmd.SysProcAttr = &syscall.SysProcAttr{
-		Setpgid:   true,
-		Pdeathsig: syscall.SIGKILL,
-	}
-
-	// Start the command
-	if err := cmd.Start(); err != nil {
 		return fmt.Errorf("failed to start binary: %w", err)
 	}
 
@@ -335,7 +297,10 @@ func ensureBinaryUpdated(destPath string) error {
 
 	_, err = os.Stat(destPath)
 	if shouldOverwrite(destPath, srcHash) || err != nil {
-		nativeLogger.Info().Msg("writing jetkvm_native")
+		nativeLogger.Info().
+			Interface("hash", srcHash).
+			Msg("writing jetkvm_native")
+
 		_ = os.Remove(destPath)
 		destFile, err := os.OpenFile(destPath, os.O_CREATE|os.O_RDWR, 0755)
 		if err != nil {

native_linux.go

@@ -0,0 +1,57 @@
+//go:build linux
+
+package kvm
+
+import (
+	"fmt"
+	"os/exec"
+	"sync"
+	"syscall"
+
+	"github.com/rs/zerolog"
+)
+
+type nativeOutput struct {
+	mu     *sync.Mutex
+	logger *zerolog.Event
+}
+
+func (w *nativeOutput) Write(p []byte) (n int, err error) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+
+	w.logger.Msg(string(p))
+	return len(p), nil
+}
+
+func startNativeBinary(binaryPath string) (*exec.Cmd, error) {
+	// Run the binary in the background
+	cmd := exec.Command(binaryPath)
+
+	nativeOutputLock := sync.Mutex{}
+	nativeStdout := &nativeOutput{
+		mu:     &nativeOutputLock,
+		logger: nativeLogger.Info().Str("pipe", "stdout"),
+	}
+	nativeStderr := &nativeOutput{
+		mu:     &nativeOutputLock,
+		logger: nativeLogger.Info().Str("pipe", "stderr"),
+	}
+
+	// Redirect stdout and stderr to the current process
+	cmd.Stdout = nativeStdout
+	cmd.Stderr = nativeStderr
+
+	// Set the process group ID so we can kill the process and its children when this process exits
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		Setpgid:   true,
+		Pdeathsig: syscall.SIGKILL,
+	}
+
+	// Start the command
+	if err := cmd.Start(); err != nil {
+		return nil, fmt.Errorf("failed to start binary: %w", err)
+	}
+
+	return cmd, nil
+}

native_notlinux.go

@@ -0,0 +1,12 @@
+//go:build !linux
+
+package kvm
+
+import (
+	"fmt"
+	"os/exec"
+)
+
+func startNativeBinary(binaryPath string) (*exec.Cmd, error) {
+	return nil, fmt.Errorf("not supported")
+}

network.go

@@ -1,237 +1,107 @@
 package kvm
 
 import (
-	"bytes"
 	"fmt"
-	"net"
-	"os"
-	"strings"
-	"time"
 
-	"os/exec"
+	"github.com/jetkvm/kvm/internal/network"
-
+	"github.com/jetkvm/kvm/internal/udhcpc"
-	"github.com/hashicorp/go-envparse"
-	"github.com/pion/mdns/v2"
-	"golang.org/x/net/ipv4"
-	"golang.org/x/net/ipv6"
-
-	"github.com/vishvananda/netlink"
-	"github.com/vishvananda/netlink/nl"
 )
 
-var mDNSConn *mdns.Conn
-
-var networkState NetworkState
-
-type NetworkState struct {
-	Up   bool
-	IPv4 string
-	IPv6 string
-	MAC  string
-
-	checked bool
-}
-
-type LocalIpInfo struct {
-	IPv4 string
-	IPv6 string
-	MAC  string
-}
-
 const (
 	NetIfName = "eth0"
-	DHCPLeaseFile = "/run/udhcpc.%s.info"
 )
 
-// setDhcpClientState sends signals to udhcpc to change it's current mode
+var (
-// of operation. Setting active to true will force udhcpc to renew the DHCP lease.
+	networkState *network.NetworkInterfaceState
-// Setting active to false will put udhcpc into idle mode.
+)
-func setDhcpClientState(active bool) {
-	var signal string
-	if active {
-		signal = "-SIGUSR1"
-	} else {
-		signal = "-SIGUSR2"
-	}
 
-	cmd := exec.Command("/usr/bin/killall", signal, "udhcpc")
+func networkStateChanged() {
-	if err := cmd.Run(); err != nil {
+	// do not block the main thread
-		logger.Warn().Err(err).Msg("network: setDhcpClientState: failed to change udhcpc state")
+	go waitCtrlAndRequestDisplayUpdate(true)
+
+	// always restart mDNS when the network state changes
+	if mDNS != nil {
+		_ = mDNS.SetLocalNames([]string{
+			networkState.GetHostname(),
+			networkState.GetFQDN(),
+		}, true)
 	}
 }
 
-func checkNetworkState() {
+func initNetwork() error {
-	iface, err := netlink.LinkByName(NetIfName)
+	ensureConfigLoaded()
-	if err != nil {
+
-		logger.Warn().Err(err).Str("interface", NetIfName).Msg("failed to get interface")
+	state, err := network.NewNetworkInterfaceState(&network.NetworkInterfaceOptions{
+		DefaultHostname: GetDefaultHostname(),
+		InterfaceName:   NetIfName,
+		NetworkConfig:   config.NetworkConfig,
+		Logger:          networkLogger,
+		OnStateChange: func(state *network.NetworkInterfaceState) {
+			networkStateChanged()
+		},
+		OnInitialCheck: func(state *network.NetworkInterfaceState) {
+			networkStateChanged()
+		},
+		OnDhcpLeaseChange: func(lease *udhcpc.Lease) {
+			networkStateChanged()
+
+			if currentSession == nil {
 				return
 			}
 
-	newState := NetworkState{
+			writeJSONRPCEvent("networkState", networkState.RpcGetNetworkState(), currentSession)
-		Up:  iface.Attrs().OperState == netlink.OperUp,
+		},
-		MAC: iface.Attrs().HardwareAddr.String(),
+		OnConfigChange: func(networkConfig *network.NetworkConfig) {
+			config.NetworkConfig = networkConfig
+			networkStateChanged()
 
-		checked: true,
+			if mDNS != nil {
+				_ = mDNS.SetListenOptions(networkConfig.GetMDNSMode())
+				_ = mDNS.SetLocalNames([]string{
+					networkState.GetHostname(),
+					networkState.GetFQDN(),
+				}, true)
 			}
-
+		},
-	addrs, err := netlink.AddrList(iface, nl.FAMILY_ALL)
-	if err != nil {
-		logger.Warn().Err(err).Str("interface", NetIfName).Msg("failed to get addresses")
-	}
-
-	// If the link is going down, put udhcpc into idle mode.
-	// If the link is coming back up, activate udhcpc and force it to renew the lease.
-	if newState.Up != networkState.Up {
-		setDhcpClientState(newState.Up)
-	}
-
-	for _, addr := range addrs {
-		if addr.IP.To4() != nil {
-			if !newState.Up && networkState.Up {
-				// If the network is going down, remove all IPv4 addresses from the interface.
-				logger.Info().Str("address", addr.IP.String()).Msg("network: state transitioned to down, removing IPv4 address")
-				err := netlink.AddrDel(iface, &addr)
-				if err != nil {
-					logger.Warn().Err(err).Str("address", addr.IP.String()).Msg("network: failed to delete address")
-				}
-
-				newState.IPv4 = "..."
-			} else {
-				newState.IPv4 = addr.IP.String()
-			}
-		} else if addr.IP.To16() != nil && newState.IPv6 == "" {
-			newState.IPv6 = addr.IP.String()
-		}
-	}
-
-	if newState != networkState {
-		logger.Info().
-			Interface("newState", newState).
-			Interface("oldState", networkState).
-			Msg("network state changed")
-
-		// restart MDNS
-		_ = startMDNS()
-		networkState = newState
-		requestDisplayUpdate()
-	}
-}
-
-func startMDNS() error {
-	// If server was previously running, stop it
-	if mDNSConn != nil {
-		logger.Info().Msg("stopping mDNS server")
-		err := mDNSConn.Close()
-		if err != nil {
-			logger.Warn().Err(err).Msg("failed to stop mDNS server")
-		}
-	}
-
-	// Start a new server
-	hostname := "jetkvm.local"
-
-	scopedLogger := logger.With().Str("hostname", hostname).Logger()
-	scopedLogger.Info().Msg("starting mDNS server")
-
-	addr4, err := net.ResolveUDPAddr("udp4", mdns.DefaultAddressIPv4)
-	if err != nil {
-		return err
-	}
-
-	addr6, err := net.ResolveUDPAddr("udp6", mdns.DefaultAddressIPv6)
-	if err != nil {
-		return err
-	}
-
-	l4, err := net.ListenUDP("udp4", addr4)
-	if err != nil {
-		return err
-	}
-
-	l6, err := net.ListenUDP("udp6", addr6)
-	if err != nil {
-		return err
-	}
-
-	mDNSConn, err = mdns.Server(ipv4.NewPacketConn(l4), ipv6.NewPacketConn(l6), &mdns.Config{
-		LocalNames:    []string{hostname}, //TODO: make it configurable
-		LoggerFactory: defaultLoggerFactory,
 	})
-	if err != nil {
+
-		scopedLogger.Warn().Err(err).Msg("failed to start mDNS server")
+	if state == nil {
-		mDNSConn = nil
+		if err == nil {
+			return fmt.Errorf("failed to create NetworkInterfaceState")
+		}
 		return err
 	}
-	//defer server.Close()
+
+	if err := state.Run(); err != nil {
+		return err
+	}
+
+	networkState = state
+
 	return nil
 }
 
-func getNTPServersFromDHCPInfo() ([]string, error) {
+func rpcGetNetworkState() network.RpcNetworkState {
-	buf, err := os.ReadFile(fmt.Sprintf(DHCPLeaseFile, NetIfName))
+	return networkState.RpcGetNetworkState()
-	if err != nil {
-		// do not return error if file does not exist
-		if os.IsNotExist(err) {
-			return nil, nil
-		}
-		return nil, fmt.Errorf("failed to load udhcpc info: %w", err)
 }
 
-	// parse udhcpc info
+func rpcGetNetworkSettings() network.RpcNetworkSettings {
-	env, err := envparse.Parse(bytes.NewReader(buf))
+	return networkState.RpcGetNetworkSettings()
-	if err != nil {
-		return nil, fmt.Errorf("failed to parse udhcpc info: %w", err)
 }
 
-	val, ok := env["ntpsrv"]
+func rpcSetNetworkSettings(settings network.RpcNetworkSettings) (*network.RpcNetworkSettings, error) {
-	if !ok {
+	s := networkState.RpcSetNetworkSettings(settings)
-		return nil, nil
+	if s != nil {
+		return nil, s
 	}
 
-	var servers []string
+	if err := SaveConfig(); err != nil {
-
+		return nil, err
-	for _, server := range strings.Fields(val) {
-		if net.ParseIP(server) == nil {
-			logger.Info().Str("server", server).Msg("invalid NTP server IP, ignoring")
-		}
-		servers = append(servers, server)
 	}
 
-	return servers, nil
+	return &network.RpcNetworkSettings{NetworkConfig: *config.NetworkConfig}, nil
 }
 
-func initNetwork() {
+func rpcRenewDHCPLease() error {
-	ensureConfigLoaded()
+	return networkState.RpcRenewDHCPLease()
-
-	updates := make(chan netlink.LinkUpdate)
-	done := make(chan struct{})
-
-	if err := netlink.LinkSubscribe(updates, done); err != nil {
-		logger.Warn().Err(err).Msg("failed to subscribe to link updates")
-		return
-	}
-
-	go func() {
-		waitCtrlClientConnected()
-		checkNetworkState()
-		ticker := time.NewTicker(1 * time.Second)
-		defer ticker.Stop()
-
-		for {
-			select {
-			case update := <-updates:
-				if update.Link.Attrs().Name == NetIfName {
-					logger.Info().Interface("update", update).Msg("link update")
-					checkNetworkState()
-				}
-			case <-ticker.C:
-				checkNetworkState()
-			case <-done:
-				return
-			}
-		}
-	}()
-	err := startMDNS()
-	if err != nil {
-		logger.Warn().Err(err).Msg("failed to run mDNS")
-	}
 }

ntp.go

@@ -1,197 +0,0 @@
-package kvm
-
-import (
-	"fmt"
-	"net/http"
-	"os/exec"
-	"strconv"
-	"time"
-
-	"github.com/beevik/ntp"
-)
-
-const (
-	timeSyncRetryStep     = 5 * time.Second
-	timeSyncRetryMaxInt   = 1 * time.Minute
-	timeSyncWaitNetChkInt = 100 * time.Millisecond
-	timeSyncWaitNetUpInt  = 3 * time.Second
-	timeSyncInterval      = 1 * time.Hour
-	timeSyncTimeout       = 2 * time.Second
-)
-
-var (
-	builtTimestamp        string
-	timeSyncRetryInterval = 0 * time.Second
-	timeSyncSuccess       = false
-	defaultNTPServers     = []string{
-		"time.cloudflare.com",
-		"time.apple.com",
-	}
-)
-
-func isTimeSyncNeeded() bool {
-	if builtTimestamp == "" {
-		ntpLogger.Warn().Msg("Built timestamp is not set, time sync is needed")
-		return true
-	}
-
-	ts, err := strconv.Atoi(builtTimestamp)
-	if err != nil {
-		ntpLogger.Warn().Str("error", err.Error()).Msg("Failed to parse built timestamp")
-		return true
-	}
-
-	// builtTimestamp is UNIX timestamp in seconds
-	builtTime := time.Unix(int64(ts), 0)
-	now := time.Now()
-
-	ntpLogger.Debug().Str("built_time", builtTime.Format(time.RFC3339)).Str("now", now.Format(time.RFC3339)).Msg("Built time and now")
-
-	if now.Sub(builtTime) < 0 {
-		ntpLogger.Warn().Msg("System time is behind the built time, time sync is needed")
-		return true
-	}
-
-	return false
-}
-
-func TimeSyncLoop() {
-	for {
-		if !networkState.checked {
-			time.Sleep(timeSyncWaitNetChkInt)
-			continue
-		}
-
-		if !networkState.Up {
-			ntpLogger.Info().Msg("Waiting for network to come up")
-			time.Sleep(timeSyncWaitNetUpInt)
-			continue
-		}
-
-		// check if time sync is needed, but do nothing for now
-		isTimeSyncNeeded()
-
-		ntpLogger.Info().Msg("Syncing system time")
-		start := time.Now()
-		err := SyncSystemTime()
-		if err != nil {
-			ntpLogger.Error().Str("error", err.Error()).Msg("Failed to sync system time")
-
-			// retry after a delay
-			timeSyncRetryInterval += timeSyncRetryStep
-			time.Sleep(timeSyncRetryInterval)
-			// reset the retry interval if it exceeds the max interval
-			if timeSyncRetryInterval > timeSyncRetryMaxInt {
-				timeSyncRetryInterval = 0
-			}
-
-			continue
-		}
-		timeSyncSuccess = true
-		ntpLogger.Info().Str("now", time.Now().Format(time.RFC3339)).
-			Str("time_taken", time.Since(start).String()).
-			Msg("Time sync successful")
-		time.Sleep(timeSyncInterval) // after the first sync is done
-	}
-}
-
-func SyncSystemTime() (err error) {
-	now, err := queryNetworkTime()
-	if err != nil {
-		return fmt.Errorf("failed to query network time: %w", err)
-	}
-	err = setSystemTime(*now)
-	if err != nil {
-		return fmt.Errorf("failed to set system time: %w", err)
-	}
-	return nil
-}
-
-func queryNetworkTime() (*time.Time, error) {
-	ntpServers, err := getNTPServersFromDHCPInfo()
-	if err != nil {
-		ntpLogger.Info().Err(err).Msg("failed to get NTP servers from DHCP info")
-	}
-
-	if ntpServers == nil {
-		ntpServers = defaultNTPServers
-		ntpLogger.Info().
-			Interface("ntp_servers", ntpServers).
-			Msg("Using default NTP servers")
-	} else {
-		ntpLogger.Info().
-			Interface("ntp_servers", ntpServers).
-			Msg("Using NTP servers from DHCP")
-	}
-
-	for _, server := range ntpServers {
-		now, err := queryNtpServer(server, timeSyncTimeout)
-		if err == nil {
-			ntpLogger.Info().
-				Str("ntp_server", server).
-				Str("time", now.Format(time.RFC3339)).
-				Msg("NTP server returned time")
-			return now, nil
-		} else {
-			ntpLogger.Error().
-				Str("ntp_server", server).
-				Str("error", err.Error()).
-				Msg("failed to query NTP server")
-		}
-	}
-
-	httpUrls := []string{
-		"http://apple.com",
-		"http://cloudflare.com",
-	}
-	for _, url := range httpUrls {
-		now, err := queryHttpTime(url, timeSyncTimeout)
-		if err == nil {
-			ntpLogger.Info().
-				Str("http_url", url).
-				Str("time", now.Format(time.RFC3339)).
-				Msg("HTTP server returned time")
-			return now, nil
-		} else {
-			ntpLogger.Error().
-				Str("http_url", url).
-				Str("error", err.Error()).
-				Msg("failed to query HTTP server")
-		}
-	}
-
-	return nil, ErrorfL(ntpLogger, "failed to query network time, all NTP servers and HTTP servers failed", nil)
-}
-
-func queryNtpServer(server string, timeout time.Duration) (now *time.Time, err error) {
-	resp, err := ntp.QueryWithOptions(server, ntp.QueryOptions{Timeout: timeout})
-	if err != nil {
-		return nil, err
-	}
-	return &resp.Time, nil
-}
-
-func queryHttpTime(url string, timeout time.Duration) (*time.Time, error) {
-	client := http.Client{
-		Timeout: timeout,
-	}
-	resp, err := client.Head(url)
-	if err != nil {
-		return nil, err
-	}
-	dateStr := resp.Header.Get("Date")
-	now, err := time.Parse(time.RFC1123, dateStr)
-	if err != nil {
-		return nil, err
-	}
-	return &now, nil
-}
-
-func setSystemTime(now time.Time) error {
-	nowStr := now.Format("2006-01-02 15:04:05")
-	output, err := exec.Command("date", "-s", nowStr).CombinedOutput()
-	if err != nil {
-		return fmt.Errorf("failed to run date -s: %w, %s", err, string(output))
-	}
-	return nil
-}

ota.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"context"
 	"crypto/sha256"
+	"crypto/tls"
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
@@ -16,6 +17,7 @@ import (
 	"time"
 
 	"github.com/Masterminds/semver/v3"
+	"github.com/gwatts/rootcerts"
 	"github.com/rs/zerolog"
 )
 
@@ -127,10 +129,14 @@ func downloadFile(ctx context.Context, path string, url string, downloadProgress
 		return fmt.Errorf("error creating request: %w", err)
 	}
 
-	// TODO: set a separate timeout for the download but keep the TLS handshake short
-	// use Transport here will cause CA certificate validation failure so we temporarily removed it
 	client := http.Client{
 		Timeout: 10 * time.Minute,
+		Transport: &http.Transport{
+			TLSHandshakeTimeout: 30 * time.Second,
+			TLSClientConfig: &tls.Config{
+				RootCAs: rootcerts.ServerCertPool(),
+			},
+		},
 	}
 
 	resp, err := client.Do(req)

resource/jetkvm_native.sha256

@@ -1 +1 @@
-c0803a9185298398eff9a925de69bd0ca882cd5983b989a45b748648146475c6
+4b925c7aa73d2e35a227833e806658cb17e1d25900611f93ed70b11ac9f1716d

timesync.go

@@ -0,0 +1,53 @@
+package kvm
+
+import (
+	"strconv"
+	"time"
+
+	"github.com/jetkvm/kvm/internal/timesync"
+)
+
+var (
+	timeSync       *timesync.TimeSync
+	builtTimestamp string
+)
+
+func isTimeSyncNeeded() bool {
+	if builtTimestamp == "" {
+		timesyncLogger.Warn().Msg("built timestamp is not set, time sync is needed")
+		return true
+	}
+
+	ts, err := strconv.Atoi(builtTimestamp)
+	if err != nil {
+		timesyncLogger.Warn().Str("error", err.Error()).Msg("failed to parse built timestamp")
+		return true
+	}
+
+	// builtTimestamp is UNIX timestamp in seconds
+	builtTime := time.Unix(int64(ts), 0)
+	now := time.Now()
+
+	if now.Sub(builtTime) < 0 {
+		timesyncLogger.Warn().
+			Str("built_time", builtTime.Format(time.RFC3339)).
+			Str("now", now.Format(time.RFC3339)).
+			Msg("system time is behind the built time, time sync is needed")
+		return true
+	}
+
+	return false
+}
+
+func initTimeSync() {
+	timeSync = timesync.NewTimeSync(&timesync.TimeSyncOptions{
+		Logger:        timesyncLogger,
+		NetworkConfig: config.NetworkConfig,
+		PreCheckFunc: func() (bool, error) {
+			if !networkState.IsOnline() {
+				return false, nil
+			}
+			return true, nil
+		},
+	})
+}

ui/dev_device.sh

@@ -15,5 +15,15 @@ echo "└───────────────────────
 
 # Set the environment variable and run Vite
 echo "Starting development server with JetKVM device at: $ip_address"
+
+# Check if pwd is the current directory of the script
+if [ "$(pwd)" != "$(dirname "$0")" ]; then
+    pushd "$(dirname "$0")" > /dev/null
+    echo "Changed directory to: $(pwd)"
+fi
+
 sleep 1
+
 JETKVM_PROXY_URL="ws://$ip_address" npx vite dev --mode=device
+
+popd > /dev/null

ui/package-lock.json

@@ -19,6 +19,7 @@
         "@xterm/addon-webgl": "^0.18.0",
         "@xterm/xterm": "^5.5.0",
         "cva": "^1.0.0-beta.1",
+        "dayjs": "^1.11.13",
         "eslint-import-resolver-alias": "^1.1.2",
         "focus-trap-react": "^10.2.3",
         "framer-motion": "^11.15.0",
@@ -2433,6 +2434,11 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/dayjs": {
+      "version": "1.11.13",
+      "resolved": "https://registry.npmjs.org/dayjs/-/dayjs-1.11.13.tgz",
+      "integrity": "sha512-oaMBel6gjolK862uaPQOVTA7q3TZhuSvuMQAAglQDOWYO9A91IrAOUJEyKVlqJlHE0vq5p5UXxzdPfMH/x6xNg=="
+    },
     "node_modules/debug": {
       "version": "4.3.4",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",

ui/package.json

@@ -30,6 +30,7 @@
     "@xterm/addon-webgl": "^0.18.0",
     "@xterm/xterm": "^5.5.0",
     "cva": "^1.0.0-beta.1",
+    "dayjs": "^1.11.13",
     "eslint-import-resolver-alias": "^1.1.2",
     "focus-trap-react": "^10.2.3",
     "framer-motion": "^11.15.0",

ui/public/sse.html

@@ -0,0 +1 @@
+../../internal/logging/sse.html

ui/src/hooks/stores.ts

@@ -663,6 +663,95 @@ export const useDeviceStore = create<DeviceState>(set => ({
   setSystemVersion: version => set({ systemVersion: version }),
 }));
 
+export interface DhcpLease {
+  ip?: string;
+  netmask?: string;
+  broadcast?: string;
+  ttl?: string;
+  mtu?: string;
+  hostname?: string;
+  domain?: string;
+  bootp_next_server?: string;
+  bootp_server_name?: string;
+  bootp_file?: string;
+  timezone?: string;
+  routers?: string[];
+  dns?: string[];
+  ntp_servers?: string[];
+  lpr_servers?: string[];
+  _time_servers?: string[];
+  _name_servers?: string[];
+  _log_servers?: string[];
+  _cookie_servers?: string[];
+  _wins_servers?: string[];
+  _swap_server?: string;
+  boot_size?: string;
+  root_path?: string;
+  lease?: string;
+  lease_expiry?: Date;
+  dhcp_type?: string;
+  server_id?: string;
+  message?: string;
+  tftp?: string;
+  bootfile?: string;
+}
+
+export interface IPv6Address {
+  address: string;
+  prefix: string;
+  valid_lifetime: string;
+  preferred_lifetime: string;
+  scope: string;
+}
+
+export interface NetworkState {
+  interface_name?: string;
+  mac_address?: string;
+  ipv4?: string;
+  ipv4_addresses?: string[];
+  ipv6?: string;
+  ipv6_addresses?: IPv6Address[];
+  ipv6_link_local?: string;
+  dhcp_lease?: DhcpLease;
+
+  setNetworkState: (state: NetworkState) => void;
+  setDhcpLease: (lease: NetworkState["dhcp_lease"]) => void;
+  setDhcpLeaseExpiry: (expiry: Date) => void;
+}
+
+
+export type IPv6Mode = "disabled" | "slaac" | "dhcpv6" | "slaac_and_dhcpv6" | "static" | "link_local" | "unknown";
+export type IPv4Mode = "disabled" | "static" | "dhcp" | "unknown";
+export type LLDPMode = "disabled" | "basic" | "all" | "unknown";
+export type mDNSMode = "disabled" | "auto" | "ipv4_only" | "ipv6_only" | "unknown";
+export type TimeSyncMode = "ntp_only" | "ntp_and_http" | "http_only" | "custom" | "unknown";
+
+export interface NetworkSettings {
+  hostname: string;
+  domain: string;
+  ipv4_mode: IPv4Mode;
+  ipv6_mode: IPv6Mode;
+  lldp_mode: LLDPMode;
+  lldp_tx_tlvs: string[];
+  mdns_mode: mDNSMode;
+  time_sync_mode: TimeSyncMode;
+}
+
+export const useNetworkStateStore = create<NetworkState>((set, get) => ({
+  setNetworkState: (state: NetworkState) => set(state),
+  setDhcpLease: (lease: NetworkState["dhcp_lease"]) => set({ dhcp_lease: lease }),
+  setDhcpLeaseExpiry: (expiry: Date) => {
+    const lease = get().dhcp_lease;
+    if (!lease) {
+      console.warn("No lease found");
+      return;
+    }
+
+    lease.lease_expiry = expiry;
+    set({ dhcp_lease: lease });
+  }
+}));
+
 export interface KeySequenceStep {
   keys: string[];
   modifiers: string[];

ui/src/main.tsx

@@ -42,6 +42,7 @@ import SettingsVideoRoute from "./routes/devices.$id.settings.video";
 import SettingsAppearanceRoute from "./routes/devices.$id.settings.appearance";
 import * as SettingsGeneralIndexRoute from "./routes/devices.$id.settings.general._index";
 import SettingsGeneralUpdateRoute from "./routes/devices.$id.settings.general.update";
+import SettingsNetworkRoute from "./routes/devices.$id.settings.network";
 import SecurityAccessLocalAuthRoute from "./routes/devices.$id.settings.access.local-auth";
 import SettingsMacrosRoute from "./routes/devices.$id.settings.macros";
 import SettingsMacrosAddRoute from "./routes/devices.$id.settings.macros.add";
@@ -156,6 +157,10 @@ if (isOnDevice) {
               path: "hardware",
               element: <SettingsHardwareRoute />,
             },
+            {
+              path: "network",
+              element: <SettingsNetworkRoute />,
+            },
             {
               path: "access",
               children: [

ui/src/routes/devices.$id.settings.network.tsx

@@ -0,0 +1,408 @@
+import { useCallback, useEffect, useState } from "react";
+
+import { SelectMenuBasic } from "../components/SelectMenuBasic";
+import { SettingsPageHeader } from "../components/SettingsPageheader";
+
+import { IPv4Mode, IPv6Mode, LLDPMode, mDNSMode, NetworkSettings, NetworkState, TimeSyncMode, useNetworkStateStore } from "@/hooks/stores";
+import { useJsonRpc } from "@/hooks/useJsonRpc";
+import notifications from "@/notifications";
+import { Button } from "@components/Button";
+import { GridCard } from "@components/Card";
+import InputField from "@components/InputField";
+import { SettingsItem } from "./devices.$id.settings";
+
+import dayjs from 'dayjs';
+import relativeTime from 'dayjs/plugin/relativeTime';
+
+dayjs.extend(relativeTime);
+
+const defaultNetworkSettings: NetworkSettings = {
+  hostname: "",
+  domain: "",
+  ipv4_mode: "unknown",
+  ipv6_mode: "unknown",
+  lldp_mode: "unknown",
+  lldp_tx_tlvs: [],
+  mdns_mode: "unknown",
+  time_sync_mode: "unknown",
+}
+
+export function LifeTimeLabel({ lifetime }: { lifetime: string }) {
+  if (lifetime == "") {
+    return <strong>N/A</strong>;
+  }
+
+  const [remaining, setRemaining] = useState<string | null>(null);
+
+  useEffect(() => {
+    setRemaining(dayjs(lifetime).fromNow());
+
+    const interval = setInterval(() => {
+      setRemaining(dayjs(lifetime).fromNow());
+    }, 1000 * 30);
+    return () => clearInterval(interval);
+  }, [lifetime]);
+
+  return <>
+    <strong>{dayjs(lifetime).format()}</strong>
+    {remaining && <>
+      {" "}<span className="text-xs text-slate-700 dark:text-slate-300">
+        ({remaining})
+      </span>
+    </>}
+  </>
+}
+
+export default function SettingsNetworkRoute() {
+  const [send] = useJsonRpc();
+  const [networkState, setNetworkState] = useNetworkStateStore(state => [state, state.setNetworkState]);
+
+  const [networkSettings, setNetworkSettings] = useState<NetworkSettings>(defaultNetworkSettings);
+  const [networkSettingsLoaded, setNetworkSettingsLoaded] = useState(false);
+
+  const getNetworkSettings = useCallback(() => {
+    setNetworkSettingsLoaded(false);
+    send("getNetworkSettings", {}, resp => {
+      if ("error" in resp) return;
+      console.log(resp.result);
+      setNetworkSettings(resp.result as NetworkSettings);
+      setNetworkSettingsLoaded(true);
+    });
+  }, [send]);
+
+  const setNetworkSettingsRemote = useCallback((settings: NetworkSettings) => {
+    setNetworkSettingsLoaded(false);
+    send("setNetworkSettings", { settings }, resp => {
+      if ("error" in resp) {
+        notifications.error("Failed to save network settings: " + (resp.error.data ? resp.error.data : resp.error.message));
+        setNetworkSettingsLoaded(true);
+        return;
+      }
+      setNetworkSettings(resp.result as NetworkSettings);
+      setNetworkSettingsLoaded(true);
+      notifications.success("Network settings saved");
+    });
+  }, [send]);
+
+  const getNetworkState = useCallback(() => {
+    send("getNetworkState", {}, resp => {
+      if ("error" in resp) return;
+      console.log(resp.result);
+      setNetworkState(resp.result as NetworkState);
+    });
+  }, [send]);
+
+  const handleRenewLease = useCallback(() => {
+    send("renewDHCPLease", {}, resp => {
+      if ("error" in resp) {
+        notifications.error("Failed to renew lease: " + resp.error.message);
+      } else {
+        notifications.success("DHCP lease renewed");
+      }
+    });
+  }, [send]);
+
+  useEffect(() => {
+    getNetworkState();
+    getNetworkSettings();
+  }, [getNetworkState, getNetworkSettings]);
+
+  const handleIpv4ModeChange = (value: IPv4Mode | string) => {
+    setNetworkSettings({ ...networkSettings, ipv4_mode: value as IPv4Mode });
+  };
+
+  const handleIpv6ModeChange = (value: IPv6Mode | string) => {
+    setNetworkSettings({ ...networkSettings, ipv6_mode: value as IPv6Mode });
+  };
+
+  const handleLldpModeChange = (value: LLDPMode | string) => {
+    setNetworkSettings({ ...networkSettings, lldp_mode: value as LLDPMode });
+  };
+
+  // const handleLldpTxTlvsChange = (value: string[]) => {
+  //   setNetworkSettings({ ...networkSettings, lldp_tx_tlvs: value });
+  // };
+
+  const handleMdnsModeChange = (value: mDNSMode | string) => {
+    setNetworkSettings({ ...networkSettings, mdns_mode: value as mDNSMode });
+  };
+
+  const handleTimeSyncModeChange = (value: TimeSyncMode | string) => {
+    setNetworkSettings({ ...networkSettings, time_sync_mode: value as TimeSyncMode });
+  };
+
+  const filterUnknown = useCallback((options: { value: string; label: string; }[]) => {
+    if (!networkSettingsLoaded) return options;
+    return options.filter(option => option.value !== "unknown");
+  }, [networkSettingsLoaded]);
+
+  return (
+    <div className="space-y-4">
+      <SettingsPageHeader
+        title="Network"
+        description="Configure your network settings"
+      />
+      <div className="space-y-4">
+        <SettingsItem
+          title="MAC Address"
+          description={<></>}
+        >
+          <span className="select-auto font-mono text-xs text-slate-700 dark:text-slate-300">
+            {networkState?.mac_address}
+          </span>
+        </SettingsItem>
+      </div>
+      <div className="space-y-4">
+        <SettingsItem
+          title="Hostname"
+          description={
+            <>
+              Hostname for the device
+              <br />
+              <span className="text-xs text-slate-700 dark:text-slate-300">
+                Leave blank for default
+              </span>
+            </>
+          }
+        >
+          <InputField
+            type="text"
+            placeholder="jetkvm"
+            value={networkSettings.hostname}
+            error={""}
+            onChange={e => {
+              setNetworkSettings({ ...networkSettings, hostname: e.target.value });
+            }}
+            disabled={!networkSettingsLoaded}
+          />
+        </SettingsItem>
+      </div>
+      <div className="space-y-4">
+        <SettingsItem
+          title="Domain"
+          description={
+            <>
+              Domain for the device
+              <br />
+              <span className="text-xs text-slate-700 dark:text-slate-300">
+                Leave blank to use DHCP provided domain, if there is no domain, use <span className="font-mono">local</span>
+              </span>
+            </>
+          }
+        >
+          <InputField
+            type="text"
+            placeholder="local"
+            value={networkSettings.domain}
+            error={""}
+            onChange={e => {
+              setNetworkSettings({ ...networkSettings, domain: e.target.value });
+            }}
+            disabled={!networkSettingsLoaded}
+          />
+        </SettingsItem>
+      </div>
+      <div className="space-y-4">
+        <SettingsItem
+          title="IPv4 Mode"
+          description="Configure the IPv4 mode"
+        >
+          <SelectMenuBasic
+            size="SM"
+            value={networkSettings.ipv4_mode}
+            onChange={e => handleIpv4ModeChange(e.target.value)}
+            disabled={!networkSettingsLoaded}
+            options={filterUnknown([
+              { value: "dhcp", label: "DHCP" },
+              // { value: "static", label: "Static" },
+            ])}
+          />
+        </SettingsItem>
+        {networkState?.dhcp_lease && (
+          <GridCard>
+            <div className="flex items-start gap-x-4 p-4">
+              <div className="space-y-3 w-full">
+                <div className="space-y-2">
+                  <h3 className="text-base font-bold text-slate-900 dark:text-white">
+                    Current DHCP Lease
+                  </h3>
+                  <div>
+                    <ul className="list-none space-y-1 text-xs text-slate-700 dark:text-slate-300">
+                      {networkState?.dhcp_lease?.ip && <li>IP: <strong>{networkState?.dhcp_lease?.ip}</strong></li>}
+                      {networkState?.dhcp_lease?.netmask && <li>Subnet: <strong>{networkState?.dhcp_lease?.netmask}</strong></li>}
+                      {networkState?.dhcp_lease?.broadcast && <li>Broadcast: <strong>{networkState?.dhcp_lease?.broadcast}</strong></li>}
+                      {networkState?.dhcp_lease?.ttl && <li>TTL: <strong>{networkState?.dhcp_lease?.ttl}</strong></li>}
+                      {networkState?.dhcp_lease?.mtu && <li>MTU: <strong>{networkState?.dhcp_lease?.mtu}</strong></li>}
+                      {networkState?.dhcp_lease?.hostname && <li>Hostname: <strong>{networkState?.dhcp_lease?.hostname}</strong></li>}
+                      {networkState?.dhcp_lease?.domain && <li>Domain: <strong>{networkState?.dhcp_lease?.domain}</strong></li>}
+                      {networkState?.dhcp_lease?.routers && <li>Gateway: <strong>{networkState?.dhcp_lease?.routers.join(", ")}</strong></li>}
+                      {networkState?.dhcp_lease?.dns && <li>DNS: <strong>{networkState?.dhcp_lease?.dns.join(", ")}</strong></li>}
+                      {networkState?.dhcp_lease?.ntp_servers && <li>NTP Servers: <strong>{networkState?.dhcp_lease?.ntp_servers.join(", ")}</strong></li>}
+                      {networkState?.dhcp_lease?.server_id && <li>Server ID: <strong>{networkState?.dhcp_lease?.server_id}</strong></li>}
+                      {networkState?.dhcp_lease?.bootp_next_server && <li>BootP Next Server: <strong>{networkState?.dhcp_lease?.bootp_next_server}</strong></li>}
+                      {networkState?.dhcp_lease?.bootp_server_name && <li>BootP Server Name: <strong>{networkState?.dhcp_lease?.bootp_server_name}</strong></li>}
+                      {networkState?.dhcp_lease?.bootp_file && <li>Boot File: <strong>{networkState?.dhcp_lease?.bootp_file}</strong></li>}
+                      {networkState?.dhcp_lease?.lease_expiry && <li>
+                        Lease Expiry: <LifeTimeLabel lifetime={`${networkState?.dhcp_lease?.lease_expiry}`} />
+                      </li>}
+                      {/* {JSON.stringify(networkState?.dhcp_lease)} */}
+                    </ul>
+                  </div>
+                </div>
+                <hr className="block w-full dark:border-slate-600" />
+                <div>
+                  <Button
+                    size="SM"
+                    theme="danger"
+                    text="Renew lease"
+                    onClick={() => {
+                      handleRenewLease();
+                    }}
+                  />
+                </div>
+              </div>
+            </div>
+          </GridCard>
+        )}
+      </div>
+      <div className="space-y-4">
+        <SettingsItem
+          title="IPv6 Mode"
+          description="Configure the IPv6 mode"
+        >
+          <SelectMenuBasic
+            size="SM"
+            value={networkSettings.ipv6_mode}
+            onChange={e => handleIpv6ModeChange(e.target.value)}
+            disabled={!networkSettingsLoaded}
+            options={filterUnknown([
+              // { value: "disabled", label: "Disabled" },
+              { value: "slaac", label: "SLAAC" },
+              // { value: "dhcpv6", label: "DHCPv6" },
+              // { value: "slaac_and_dhcpv6", label: "SLAAC and DHCPv6" },
+              // { value: "static", label: "Static" },
+              // { value: "link_local", label: "Link-local only" },
+            ])}
+          />
+        </SettingsItem>
+        {networkState?.ipv6_addresses && (
+          <GridCard>
+            <div className="flex items-start gap-x-4 p-4">
+              <div className="space-y-3 w-full">
+                <div className="space-y-2">
+                  <h3 className="text-base font-bold text-slate-900 dark:text-white">
+                    IPv6 Information
+                  </h3>
+                  <div className="space-y-2">
+                    <div>
+                      <h4 className="text-sm font-bold text-slate-900 dark:text-white">
+                        IPv6 Link-local
+                      </h4>
+                      <p className="text-xs text-slate-700 dark:text-slate-300">
+                        {networkState?.ipv6_link_local}
+                      </p>
+                    </div>
+                    <div>
+                      <h4 className="text-sm font-bold text-slate-900 dark:text-white">
+                        IPv6 Addresses
+                      </h4>
+                      <ul className="list-none space-y-1 text-xs text-slate-700 dark:text-slate-300">
+                        {networkState?.ipv6_addresses && networkState?.ipv6_addresses.map(addr => (
+                          <li key={addr.address}>
+                            {addr.address}
+                            {addr.valid_lifetime && <>
+                              <br />
+                              - valid_lft: {" "}
+                              <span className="text-xs text-slate-700 dark:text-slate-300">
+                                <LifeTimeLabel lifetime={`${addr.valid_lifetime}`} />
+                              </span>
+                            </>}
+                            {addr.preferred_lifetime && <>
+                              <br />
+                              - pref_lft: {" "}
+                              <span className="text-xs text-slate-700 dark:text-slate-300">
+                                <LifeTimeLabel lifetime={`${addr.preferred_lifetime}`} />
+                              </span>
+                            </>}
+                          </li>
+                        ))}
+                      </ul>
+                    </div>
+                  </div>
+                </div>
+              </div>
+            </div>
+          </GridCard>
+        )}
+      </div>
+      <div className="space-y-4 hidden">
+        <SettingsItem
+          title="LLDP"
+          description="Control which TLVs will be sent over Link Layer Discovery Protocol"
+        >
+          <SelectMenuBasic
+            size="SM"
+            value={networkSettings.lldp_mode}
+            onChange={e => handleLldpModeChange(e.target.value)}
+            disabled={!networkSettingsLoaded}
+            options={filterUnknown([
+              { value: "disabled", label: "Disabled" },
+              { value: "basic", label: "Basic" },
+              { value: "all", label: "All" },
+            ])}
+          />
+        </SettingsItem>
+      </div>
+      <div className="space-y-4">
+        <SettingsItem
+          title="mDNS"
+          description="Control mDNS (multicast DNS) operational mode"
+        >
+          <SelectMenuBasic
+            size="SM"
+            value={networkSettings.mdns_mode}
+            onChange={e => handleMdnsModeChange(e.target.value)}
+            disabled={!networkSettingsLoaded}
+            options={filterUnknown([
+              { value: "disabled", label: "Disabled" },
+              { value: "auto", label: "Auto" },
+              { value: "ipv4_only", label: "IPv4 only" },
+              { value: "ipv6_only", label: "IPv6 only" },
+            ])}
+          />
+        </SettingsItem>
+      </div>
+      <div className="space-y-4">
+        <SettingsItem
+          title="Time synchronization"
+          description="Configure time synchronization settings"
+        >
+          <SelectMenuBasic
+            size="SM"
+            value={networkSettings.time_sync_mode}
+            onChange={e => handleTimeSyncModeChange(e.target.value)}
+            disabled={!networkSettingsLoaded}
+            options={filterUnknown([
+              { value: "unknown", label: "..." },
+              // { value: "auto", label: "Auto" },
+              { value: "ntp_only", label: "NTP only" },
+              { value: "ntp_and_http", label: "NTP and HTTP" },
+              { value: "http_only", label: "HTTP only" },
+              // { value: "custom", label: "Custom" },
+            ])}
+          />
+        </SettingsItem>
+      </div>
+      <div className="flex items-end gap-x-2">
+        <Button
+          onClick={() => {
+            setNetworkSettingsRemote(networkSettings);
+          }}
+          size="SM"
+          theme="light"
+          text="Save Settings"
+        />
+      </div>
+    </div>
+  );
+}

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

@@ -9,6 +9,7 @@ import {
   LuArrowLeft,
   LuPalette,
   LuCommand,
+  LuNetwork,
 } from "react-icons/lu";
 import React, { useEffect, useRef, useState } from "react";
 
@@ -207,6 +208,17 @@ export default function SettingsRoute() {
                     </div>
                   </NavLink>
                 </div>
+                <div className="shrink-0">
+                  <NavLink
+                    to="network"
+                    className={({ isActive }) => (isActive ? "active" : "")}
+                  >
+                    <div className="flex items-center gap-x-2 rounded-md px-2.5 py-2.5 text-sm transition-colors hover:bg-slate-100 dark:hover:bg-slate-700 [.active_&]:bg-blue-50 [.active_&]:!text-blue-700 md:[.active_&]:bg-transparent dark:[.active_&]:bg-blue-900 dark:[.active_&]:!text-blue-200 dark:md:[.active_&]:bg-transparent">
+                      <LuNetwork className="h-4 w-4 shrink-0" />
+                      <h1>Network</h1>
+                    </div>
+                  </NavLink>
+                </div>
                 <div className="shrink-0">
                   <NavLink
                     to="advanced"

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

@@ -20,11 +20,13 @@ import { cx } from "@/cva.config";
 import {
   DeviceSettingsState,
   HidState,
+  NetworkState,
   UpdateState,
   useDeviceSettingsStore,
   useDeviceStore,
   useHidStore,
   useMountMediaStore,
+  useNetworkStateStore,
   User,
   useRTCStore,
   useUiStore,
@@ -581,6 +583,8 @@ export default function KvmIdRoute() {
     });
   }, 10000);
 
+  const setNetworkState = useNetworkStateStore(state => state.setNetworkState);
+
   const setUsbState = useHidStore(state => state.setUsbState);
   const setHdmiState = useVideoStore(state => state.setHdmiState);
 
@@ -600,6 +604,11 @@ export default function KvmIdRoute() {
       setHdmiState(resp.params as Parameters<VideoState["setHdmiState"]>[0]);
     }
 
+    if (resp.method === "networkState") {
+      console.log("Setting network state", resp.params);
+      setNetworkState(resp.params as NetworkState);
+    }
+
     if (resp.method === "otaState") {
       const otaState = resp.params as UpdateState["otaState"];
       setOtaState(otaState);

ui/vite.config.ts

@@ -35,6 +35,7 @@ export default defineConfig(({ mode, command }) => {
             "/auth": JETKVM_PROXY_URL,
             "/storage": JETKVM_PROXY_URL,
             "/cloud": JETKVM_PROXY_URL,
+            "/developer": JETKVM_PROXY_URL,
           }
         : undefined,
     },

usb.go

@@ -66,6 +66,6 @@ func checkUSBState() {
 	usbState = newState
 
 	usbLogger.Info().Str("from", usbState).Str("to", newState).Msg("USB state changed")
-	requestDisplayUpdate()
+	requestDisplayUpdate(true)
 	triggerUSBStateUpdate()
 }

usb_mass_storage.go

@@ -62,7 +62,11 @@ func onDiskMessage(msg webrtc.DataChannelMessage) {
 func mountImage(imagePath string) error {
 	err := setMassStorageImage("")
 	if err != nil {
-		return fmt.Errorf("remove Mass Storage Image Error: %w", err)
+		return fmt.Errorf("remove mass storage image error: %w", err)
+	}
+	err = setMassStorageImage(imagePath)
+	if err != nil {
+		return fmt.Errorf("set mass storage image error: %w", err)
 	}
 	err = setMassStorageImage(imagePath)
 	if err != nil {
@@ -477,7 +481,6 @@ func handleUploadChannel(d *webrtc.DataChannel) {
 		totalBytesWritten += int64(bytesWritten)
 
 		sendProgress := time.Since(lastProgressTime) >= 200*time.Millisecond
-
 		if totalBytesWritten >= pendingUpload.Size {
 			sendProgress = true
 			close(uploadComplete)

video.go

@@ -43,7 +43,7 @@ func HandleVideoStateMessage(event CtrlResponse) {
 	}
 	lastVideoState = videoState
 	triggerVideoStateUpdate()
-	requestDisplayUpdate()
+	requestDisplayUpdate(true)
 }
 
 func rpcGetVideoState() (VideoInputState, error) {

web.go

@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"io/fs"
 	"net/http"
+	"net/http/pprof"
 	"path/filepath"
 	"strings"
 	"time"
@@ -18,6 +19,7 @@ import (
 	gin_logger "github.com/gin-contrib/logger"
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
+	"github.com/jetkvm/kvm/internal/logging"
 	"github.com/pion/webrtc/v4"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
@@ -103,6 +105,27 @@ func setupRouter() *gin.Engine {
 	// A Prometheus metrics endpoint.
 	r.GET("/metrics", gin.WrapH(promhttp.Handler()))
 
+	// Developer mode protected routes
+	developerModeRouter := r.Group("/developer/")
+	developerModeRouter.Use(basicAuthProtectedMiddleware(true))
+	{
+		// pprof
+		developerModeRouter.GET("/pprof/", gin.WrapF(pprof.Index))
+		developerModeRouter.GET("/pprof/cmdline", gin.WrapF(pprof.Cmdline))
+		developerModeRouter.GET("/pprof/profile", gin.WrapF(pprof.Profile))
+		developerModeRouter.POST("/pprof/symbol", gin.WrapF(pprof.Symbol))
+		developerModeRouter.GET("/pprof/symbol", gin.WrapF(pprof.Symbol))
+		developerModeRouter.GET("/pprof/trace", gin.WrapF(pprof.Trace))
+		developerModeRouter.GET("/pprof/allocs", gin.WrapH(pprof.Handler("allocs")))
+		developerModeRouter.GET("/pprof/block", gin.WrapH(pprof.Handler("block")))
+		developerModeRouter.GET("/pprof/goroutine", gin.WrapH(pprof.Handler("goroutine")))
+		developerModeRouter.GET("/pprof/heap", gin.WrapH(pprof.Handler("heap")))
+		developerModeRouter.GET("/pprof/mutex", gin.WrapH(pprof.Handler("mutex")))
+		developerModeRouter.GET("/pprof/threadcreate", gin.WrapH(pprof.Handler("threadcreate")))
+
+		logging.AttachSSEHandler(developerModeRouter)
+	}
+
 	// Protected routes (allows both password and noPassword modes)
 	protected := r.Group("/")
 	protected.Use(protectedMiddleware())
@@ -203,7 +226,7 @@ func handleLocalWebRTCSignal(c *gin.Context) {
 	wsOptions := &websocket.AcceptOptions{
 		InsecureSkipVerify: true, // Allow connections from any origin
 		OnPingReceived: func(ctx context.Context, payload []byte) bool {
-			scopedLogger.Info().Bytes("payload", payload).Msg("ping frame received")
+			scopedLogger.Debug().Bytes("payload", payload).Msg("ping frame received")
 
 			metricConnectionTotalPingReceivedCount.WithLabelValues("local", source).Inc()
 			metricConnectionLastPingReceivedTimestamp.WithLabelValues("local", source).SetToCurrentTime()
@@ -242,7 +265,12 @@ func handleWebRTCSignalWsMessages(
 	scopedLogger *zerolog.Logger,
 ) error {
 	runCtx, cancelRun := context.WithCancel(context.Background())
-	defer cancelRun()
+	defer func() {
+		if isCloudConnection {
+			setCloudConnectionState(CloudConnectionStateDisconnected)
+		}
+		cancelRun()
+	}()
 
 	// connection type
 	var sourceType string
@@ -459,11 +487,51 @@ func protectedMiddleware() gin.HandlerFunc {
 	}
 }
 
+func sendErrorJsonThenAbort(c *gin.Context, status int, message string) {
+	c.JSON(status, gin.H{"error": message})
+	c.Abort()
+}
+
+func basicAuthProtectedMiddleware(requireDeveloperMode bool) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if requireDeveloperMode {
+			devModeState, err := rpcGetDevModeState()
+			if err != nil {
+				sendErrorJsonThenAbort(c, http.StatusInternalServerError, "Failed to get developer mode state")
+				return
+			}
+
+			if !devModeState.Enabled {
+				sendErrorJsonThenAbort(c, http.StatusUnauthorized, "Developer mode is not enabled")
+				return
+			}
+		}
+
+		if config.LocalAuthMode == "noPassword" {
+			sendErrorJsonThenAbort(c, http.StatusForbidden, "The resource is not available in noPassword mode")
+			return
+		}
+
+		// calculate basic auth credentials
+		_, password, ok := c.Request.BasicAuth()
+		if !ok {
+			c.Header("WWW-Authenticate", "Basic realm=\"JetKVM\"")
+			sendErrorJsonThenAbort(c, http.StatusUnauthorized, "Basic auth is required")
+			return
+		}
+
+		err := bcrypt.CompareHashAndPassword([]byte(config.HashedPassword), []byte(password))
+		if err != nil {
+			sendErrorJsonThenAbort(c, http.StatusUnauthorized, "Invalid password")
+			return
+		}
+
+		c.Next()
+	}
+}
+
 func RunWebServer() {
 	r := setupRouter()
-	//if strings.Contains(builtAppVersion, "-dev") {
-	//	pprof.Register(r)
-	//}
 	err := r.Run(":80")
 	if err != nil {
 		panic(err)

web_tls.go

@@ -54,7 +54,7 @@ func initCertStore() {
 func getCertificate(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
 	switch config.TLSMode {
 	case "self-signed":
-		if isTimeSyncNeeded() || !timeSyncSuccess {
+		if isTimeSyncNeeded() || !timeSync.IsSyncSuccess() {
 			return nil, fmt.Errorf("time is not synced")
 		}
 		return certSigner.GetCertificate(info)
@@ -174,7 +174,7 @@ func runWebSecureServer() {
 			websecureLogger.Info().Msg("Shutting down websecure server")
 			err := server.Shutdown(context.Background())
 			if err != nil {
-				websecureLogger.Error().Err(err).Msg("Failed to shutdown websecure server")
+				websecureLogger.Error().Err(err).Msg("failed to shutdown websecure server")
 			}
 		}
 	}()

webrtc.go

@@ -10,6 +10,7 @@ import (
 	"github.com/coder/websocket"
 	"github.com/coder/websocket/wsjson"
 	"github.com/gin-gonic/gin"
+	"github.com/jetkvm/kvm/internal/logging"
 	"github.com/pion/webrtc/v4"
 	"github.com/rs/zerolog"
 )
@@ -68,7 +69,7 @@ func (s *Session) ExchangeOffer(offerStr string) (string, error) {
 
 func newSession(config SessionConfig) (*Session, error) {
 	webrtcSettingEngine := webrtc.SettingEngine{
-		LoggerFactory: defaultLoggerFactory,
+		LoggerFactory: logging.GetPionDefaultLoggerFactory(),
 	}
 	iceServer := webrtc.ICEServer{}
 
@@ -205,7 +206,7 @@ func newSession(config SessionConfig) (*Session, error) {
 var actionSessions = 0
 
 func onActiveSessionsChanged() {
-	requestDisplayUpdate()
+	requestDisplayUpdate(true)
 }
 
 func onFirstSessionConnected() {