Refactor: Rename NanoKVM to BatchuKVM and update server URL

server/service/hid/hid.go

@@ -0,0 +1,161 @@
+package hid
+
+import (
+	"errors"
+	"os"
+	"sync"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+)
+
+type Hid struct {
+	g0         *os.File
+	g1         *os.File
+	g2         *os.File
+	kbMutex    sync.Mutex
+	mouseMutex sync.Mutex
+}
+
+const (
+	HID0 = "/dev/hidg0"
+	HID1 = "/dev/hidg1"
+	HID2 = "/dev/hidg2"
+)
+
+var (
+	hid     *Hid
+	hidOnce sync.Once
+)
+
+func GetHid() *Hid {
+	hidOnce.Do(func() {
+		hid = &Hid{}
+	})
+	return hid
+}
+
+func (h *Hid) Lock() {
+	h.kbMutex.Lock()
+	h.mouseMutex.Lock()
+}
+
+func (h *Hid) Unlock() {
+	h.kbMutex.Unlock()
+	h.mouseMutex.Unlock()
+}
+
+func (h *Hid) OpenNoLock() {
+	var err error
+	h.CloseNoLock()
+
+	h.g0, err = os.OpenFile(HID0, os.O_WRONLY, 0o666)
+	if err != nil {
+		log.Errorf("open %s failed: %s", HID0, err)
+	}
+
+	h.g1, err = os.OpenFile(HID1, os.O_WRONLY, 0o666)
+	if err != nil {
+		log.Errorf("open %s failed: %s", HID1, err)
+	}
+
+	h.g2, err = os.OpenFile(HID2, os.O_WRONLY, 0o666)
+	if err != nil {
+		log.Errorf("open %s failed: %s", HID2, err)
+	}
+}
+
+func (h *Hid) CloseNoLock() {
+	for _, file := range []*os.File{h.g0, h.g1, h.g2} {
+		if file != nil {
+			_ = file.Sync()
+			_ = file.Close()
+		}
+	}
+}
+
+func (h *Hid) Open() {
+	h.kbMutex.Lock()
+	defer h.kbMutex.Unlock()
+	h.mouseMutex.Lock()
+	defer h.mouseMutex.Unlock()
+
+	h.CloseNoLock()
+
+	h.OpenNoLock()
+}
+
+func (h *Hid) Close() {
+	h.kbMutex.Lock()
+	defer h.kbMutex.Unlock()
+	h.mouseMutex.Lock()
+	defer h.mouseMutex.Unlock()
+
+	h.CloseNoLock()
+}
+
+func (h *Hid) WriteHid0(data []byte) {
+	h.kbMutex.Lock()
+	_, err := h.g0.Write(data)
+	h.kbMutex.Unlock()
+
+	if err != nil {
+		if errors.Is(err, os.ErrClosed) {
+			log.Errorf("hid already closed, reopen it...")
+			h.OpenNoLock()
+		} else {
+			log.Debugf("write to %s failed: %s", HID0, err)
+		}
+		return
+	}
+
+	log.Debugf("write to %s: %v", HID0, data)
+}
+
+func (h *Hid) WriteHid1(data []byte) {
+	deadline := time.Now().Add(8 * time.Millisecond)
+
+	h.mouseMutex.Lock()
+	_ = h.g1.SetWriteDeadline(deadline)
+	_, err := h.g1.Write(data)
+	h.mouseMutex.Unlock()
+
+	if err != nil {
+		switch {
+		case errors.Is(err, os.ErrClosed):
+			log.Errorf("hid already closed, reopen it...")
+			h.OpenNoLock()
+		case errors.Is(err, os.ErrDeadlineExceeded):
+			log.Debugf("write to %s timeout", HID1)
+		default:
+			log.Errorf("write to %s failed: %s", HID1, err)
+		}
+		return
+	}
+
+	log.Debugf("write to %s: %v", HID1, data)
+}
+
+func (h *Hid) WriteHid2(data []byte) {
+	deadline := time.Now().Add(8 * time.Millisecond)
+
+	h.mouseMutex.Lock()
+	_ = h.g2.SetWriteDeadline(deadline)
+	_, err := h.g2.Write(data)
+	h.mouseMutex.Unlock()
+
+	if err != nil {
+		switch {
+		case errors.Is(err, os.ErrClosed):
+			log.Errorf("hid already closed, reopen it...")
+			h.OpenNoLock()
+		case errors.Is(err, os.ErrDeadlineExceeded):
+			log.Debugf("write to %s timeout", HID2)
+		default:
+			log.Errorf("write to %s failed: %s", HID2, err)
+		}
+		return
+	}
+
+	log.Debugf("write to %s: %v", HID2, data)
+}

server/service/hid/keyboard.go

@@ -0,0 +1,15 @@
+package hid
+
+func (h *Hid) Keyboard(queue <-chan []int) {
+	for event := range queue {
+		code := byte(event[0])
+
+		var modifier byte = 0x00
+		if code > 0 {
+			modifier = byte(event[1]) | byte(event[2]) | byte(event[3]) | byte(event[4])
+		}
+
+		data := []byte{modifier, 0x00, code, 0x00, 0x00, 0x00, 0x00, 0x00}
+		h.WriteHid0(data)
+	}
+}

server/service/hid/mouse.go

@@ -0,0 +1,82 @@
+package hid
+
+import (
+	"encoding/binary"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	MouseUp = iota
+	MouseDown
+	MouseMoveAbsolute
+	MouseMoveRelative
+	MouseScroll
+)
+
+var mouseButtonMap = map[byte]bool{
+	0x01: true,
+	0x02: true,
+	0x04: true,
+}
+
+func (h *Hid) Mouse(queue <-chan []int) {
+	for event := range queue {
+
+		switch event[0] {
+		case MouseDown:
+			h.mouseDown(event)
+		case MouseUp:
+			h.mouseUp()
+		case MouseMoveAbsolute:
+			h.mouseMoveAbsolute(event)
+		case MouseMoveRelative:
+			h.mouseMoveRelative(event)
+		case MouseScroll:
+			h.mouseScroll(event)
+		default:
+			log.Debugf("invalid mouse event: %v", event)
+		}
+	}
+}
+
+func (h *Hid) mouseDown(event []int) {
+	button := byte(event[1])
+
+	if _, ok := mouseButtonMap[button]; !ok {
+		log.Errorf("invalid mouse button: %v", event)
+		return
+	}
+
+	data := []byte{button, 0, 0, 0}
+	h.WriteHid1(data)
+}
+
+func (h *Hid) mouseUp() {
+	data := []byte{0, 0, 0, 0}
+	h.WriteHid1(data)
+}
+
+func (h *Hid) mouseScroll(event []int) {
+	direction := 0x01
+	if event[3] > 0 {
+		direction = -0x1
+	}
+
+	data := []byte{0, 0, 0, byte(direction)}
+	h.WriteHid1(data)
+}
+func (h *Hid) mouseMoveAbsolute(event []int) {
+	x := make([]byte, 2)
+	y := make([]byte, 2)
+	binary.LittleEndian.PutUint16(x, uint16(event[2]))
+	binary.LittleEndian.PutUint16(y, uint16(event[3]))
+
+	data := []byte{0, x[0], x[1], y[0], y[1], 0}
+	h.WriteHid2(data)
+}
+
+func (h *Hid) mouseMoveRelative(event []int) {
+	data := []byte{byte(event[1]), byte(event[2]), byte(event[3]), 0}
+	h.WriteHid1(data)
+}

server/service/hid/paste.go

@@ -0,0 +1,197 @@
+package hid
+
+import (
+	"time"
+
+	"github.com/gin-gonic/gin"
+	log "github.com/sirupsen/logrus"
+
+	"NanoKVM-Server/proto"
+)
+
+type Char struct {
+	Modifiers int
+	Code      int
+}
+
+type PasteReq struct {
+	Content string `form:"content" validate:"required"`
+	Langue  string `form:"langue"`
+}
+
+func LangueSwitch(base map[rune]Char, lang string) map[rune]Char {
+	// wenn kein lang angegeben → Standardmap zurück
+	if lang == "" {
+		return base
+	}
+
+	// immer Kopie erstellen
+	m := copyMap(base)
+
+	switch lang {
+	case "de":
+		// Y tauschen
+		m['y'] = Char{0, 29}
+		m['Y'] = Char{2, 29}
+
+		// Z tauschen
+		m['z'] = Char{0, 28}
+		m['Z'] = Char{2, 28}
+
+		// deutsche Sonderzeichen hinzufügen oder remappen
+		m['\u00E4'] = Char{0, 52} // ä
+		m['\u00C4'] = Char{2, 52} // Ä
+		m['\u00F6'] = Char{0, 51} // ö
+		m['\u00D6'] = Char{2, 51} // Ö
+		m['\u00FC'] = Char{0, 47} // ü
+		m['\u00DC'] = Char{2, 47} // Ü
+		m['\u00DF'] = Char{0, 45} // ß
+
+		//Tauschen
+		m['^'] = Char{0, 53}     // muss doppelt sein
+		m['/'] = Char{2, 36}     // Shift + 7
+		m['('] = Char{2, 37}     // Shift + 8
+		m['&'] = Char{2, 35}     // Shift + 6
+		m[')'] = Char{2, 38}     // Shift + 9
+		m['`'] = Char{2, 46}     // Grave Accent / Backtick
+		m['"'] = Char{2, 31}     // Shift + 2
+		m['?'] = Char{2, 45}     // Shift + ß
+		m['{'] = Char{0x40, 36}  // ALt Gr + 7
+		m['['] = Char{0x40, 37}  // ALt Gr + 8
+		m[']'] = Char{0x40, 38}  // ALt Gr + 6
+		m['}'] = Char{0x40, 39}  // ALt Gr + 0
+		m['\\'] = Char{0x40, 45} // ALt Gr + ß
+		m['@'] = Char{0x40, 20}  // ALt Gr + q
+		m['+'] = Char{0, 48}     // Shift + +
+		m['*'] = Char{2, 48}     // Shift + +
+		m['~'] = Char{0x40, 48}  // Shift + +
+		m['#'] = Char{0, 49}     // Shift + #
+		m['\''] = Char{2, 49}    // Shift + #
+		m['<'] = Char{0, 100}    // Shift + <
+		m['>'] = Char{2, 100}    // Shift + <
+		m['|'] = Char{0x40, 100} // ALt Gr + <
+		m[';'] = Char{2, 54}     // Shift + ,
+		m[':'] = Char{2, 55}     // Shift + .
+		m['-'] = Char{0, 56}     // Shift + -
+		m['_'] = Char{2, 56}     // Shift + -
+
+		//neu
+		m['\u00B4'] = Char{0, 46}    // ´
+		m['\u00B0'] = Char{2, 53}    // °
+		m['\u00A7'] = Char{2, 32}    // §
+		m['\u20AC'] = Char{0x40, 8}  // €
+		m['\u00B2'] = Char{0x40, 31} // ²
+		m['\u00B3'] = Char{0x40, 32} // ³
+
+	}
+	return m
+}
+
+func (s *Service) Paste(c *gin.Context) {
+	var req PasteReq
+	var rsp proto.Response
+
+	if err := proto.ParseFormRequest(c, &req); err != nil {
+		rsp.ErrRsp(c, -1, "invalid arguments")
+		return
+	}
+
+	if len(req.Content) > 1024 {
+		rsp.ErrRsp(c, -2, "content too long")
+		return
+	}
+
+	charMapLocal := LangueSwitch(charMap, req.Langue)
+
+	keyUp := []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
+
+	for _, char := range req.Content {
+		key, ok := charMapLocal[char]
+		if !ok {
+			log.Debugf("unknown key '%c' (rune: %d)", char, char)
+			continue
+		}
+
+		keyDown := []byte{byte(key.Modifiers), 0x00, byte(key.Code), 0x00, 0x00, 0x00, 0x00, 0x00}
+
+		hid.WriteHid0(keyDown)
+		hid.WriteHid0(keyUp)
+		time.Sleep(30 * time.Millisecond)
+	}
+
+	rsp.OkRsp(c)
+	log.Debugf("hid paste success, total %d characters processed", len(req.Content))
+}
+
+func copyMap(src map[rune]Char) map[rune]Char {
+	dst := make(map[rune]Char, len(src))
+	for k, v := range src {
+		dst[k] = v
+	}
+	return dst
+}
+
+var charMap = map[rune]Char{
+	// Lowercase letters
+	'a': {0, 4}, 'b': {0, 5}, 'c': {0, 6}, 'd': {0, 7}, 'e': {0, 8},
+	'f': {0, 9}, 'g': {0, 10}, 'h': {0, 11}, 'i': {0, 12}, 'j': {0, 13},
+	'k': {0, 14}, 'l': {0, 15}, 'm': {0, 16}, 'n': {0, 17}, 'o': {0, 18},
+	'p': {0, 19}, 'q': {0, 20}, 'r': {0, 21}, 's': {0, 22}, 't': {0, 23},
+	'u': {0, 24}, 'v': {0, 25}, 'w': {0, 26}, 'x': {0, 27}, 'y': {0, 28},
+	'z': {0, 29},
+
+	// Uppercase letters (Modifier 2 typically means Left Shift)
+	'A': {2, 4}, 'B': {2, 5}, 'C': {2, 6}, 'D': {2, 7}, 'E': {2, 8},
+	'F': {2, 9}, 'G': {2, 10}, 'H': {2, 11}, 'I': {2, 12}, 'J': {2, 13},
+	'K': {2, 14}, 'L': {2, 15}, 'M': {2, 16}, 'N': {2, 17}, 'O': {2, 18},
+	'P': {2, 19}, 'Q': {2, 20}, 'R': {2, 21}, 'S': {2, 22}, 'T': {2, 23},
+	'U': {2, 24}, 'V': {2, 25}, 'W': {2, 26}, 'X': {2, 27}, 'Y': {2, 28},
+	'Z': {2, 29},
+
+	// Numbers
+	'1': {0, 30}, '2': {0, 31}, '3': {0, 32}, '4': {0, 33}, '5': {0, 34},
+	'6': {0, 35}, '7': {0, 36}, '8': {0, 37}, '9': {0, 38}, '0': {0, 39},
+
+	// Shifted numbers / Symbols
+	'!': {2, 30}, // Shift + 1
+	'@': {2, 31}, // Shift + 2
+	'#': {2, 32}, // Shift + 3
+	'$': {2, 33}, // Shift + 4
+	'%': {2, 34}, // Shift + 5
+	'^': {2, 35}, // Shift + 6
+	'&': {2, 36}, // Shift + 7
+	'*': {2, 37}, // Shift + 8
+	'(': {2, 38}, // Shift + 9
+	')': {2, 39}, // Shift + 0
+
+	// Other common characters
+	'\n': {0, 40}, // Enter (Return)
+	'\t': {0, 43}, // Tab
+	' ':  {0, 44}, // Space
+	'-':  {0, 45}, // Hyphen / Minus
+	'=':  {0, 46}, // Equals
+	'[':  {0, 47}, // Left Square Bracket
+	']':  {0, 48}, // Right Square Bracket
+	'\\': {0, 49}, // Backslash
+
+	';':  {0, 51}, // Semicolon
+	'\'': {0, 52}, // Apostrophe / Single Quote
+	'`':  {0, 53}, // Grave Accent / Backtick
+	',':  {0, 54}, // Comma
+	'.':  {0, 55}, // Period / Dot
+	'/':  {0, 56}, // Slash
+
+	// Shifted symbols
+	'_': {2, 45}, // Underscore (Shift + Hyphen)
+	'+': {2, 46}, // Plus (Shift + Equals)
+	'{': {2, 47}, // Left Curly Brace (Shift + Left Square Bracket)
+	'}': {2, 48}, // Right Curly Brace (Shift + Right Square Bracket)
+	'|': {2, 49}, // Pipe (Shift + Backslash)
+
+	':': {2, 51}, // Colon (Shift + Semicolon)
+	'"': {2, 52}, // Double Quote (Shift + Apostrophe)
+	'~': {2, 53}, // Tilde (Shift + Grave Accent)
+	'<': {2, 54}, // Less Than (Shift + Comma)
+	'>': {2, 55}, // Greater Than (Shift + Period)
+	'?': {2, 56}, // Question Mark (Shift + Slash)
+}

server/service/hid/service.go

@@ -0,0 +1,11 @@
+package hid
+
+type Service struct {
+	hid *Hid
+}
+
+func NewService() *Service {
+	return &Service{
+		hid: GetHid(),
+	}
+}

server/service/hid/status.go

@@ -0,0 +1,191 @@
+package hid
+
+import (
+	"NanoKVM-Server/proto"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	ModeNormal  = "normal"
+	ModeHidOnly = "hid-only"
+	ModeFlag    = "/sys/kernel/config/usb_gadget/g0/bcdDevice"
+
+	ModeNormalScript  = "/kvmapp/system/init.d/S03usbdev"
+	ModeHidOnlyScript = "/kvmapp/system/init.d/S03usbhid"
+
+	USBDevScript = "/etc/init.d/S03usbdev"
+)
+
+var modeMap = map[string]string{
+	"0x0510": ModeNormal,
+	"0x0623": ModeHidOnly,
+}
+
+func (s *Service) GetHidMode(c *gin.Context) {
+	var rsp proto.Response
+
+	mode, err := getHidMode()
+	if err != nil {
+		rsp.ErrRsp(c, -1, "get HID mode failed")
+		return
+	}
+
+	rsp.OkRspWithData(c, &proto.GetHidModeRsp{
+		Mode: mode,
+	})
+	log.Debugf("get hid mode: %s", mode)
+}
+
+func (s *Service) SetHidMode(c *gin.Context) {
+	var req proto.SetHidModeReq
+	var rsp proto.Response
+
+	if err := proto.ParseFormRequest(c, &req); err != nil {
+		rsp.ErrRsp(c, -1, "invalid arguments")
+		return
+	}
+	if req.Mode != ModeNormal && req.Mode != ModeHidOnly {
+		rsp.ErrRsp(c, -2, "invalid arguments")
+		return
+	}
+
+	if mode, _ := getHidMode(); req.Mode == mode {
+		rsp.OkRsp(c)
+		return
+	}
+
+	h := GetHid()
+	h.Lock()
+	h.CloseNoLock()
+	defer func() {
+		h.OpenNoLock()
+		h.Unlock()
+	}()
+
+	srcScript := ModeNormalScript
+	if req.Mode == ModeHidOnly {
+		srcScript = ModeHidOnlyScript
+	}
+
+	if err := copyModeFile(srcScript); err != nil {
+		rsp.ErrRsp(c, -3, "operation failed")
+		return
+	}
+
+	rsp.OkRsp(c)
+
+	log.Println("reboot system...")
+	time.Sleep(500 * time.Millisecond)
+	_ = exec.Command("reboot").Run()
+}
+
+func (s *Service) ResetHid(c *gin.Context) {
+	var rsp proto.Response
+
+	h := GetHid()
+	h.Lock()
+	h.CloseNoLock()
+	defer func() {
+		h.OpenNoLock()
+		h.Unlock()
+	}()
+
+	command := fmt.Sprintf("%s restart_phy", USBDevScript)
+	err := exec.Command("sh", "-c", command).Run()
+	if err != nil {
+		log.Errorf("failed to reset hid: %v", err)
+		rsp.ErrRsp(c, -1, "failed to reset hid")
+		return
+	}
+
+	rsp.OkRsp(c)
+	log.Debugf("reset hid success")
+}
+
+func copyModeFile(srcScript string) error {
+	// open the source file
+	srcFile, err := os.Open(srcScript)
+	if err != nil {
+		log.Errorf("failed to open %s: %s", srcScript, err)
+		return err
+	}
+	defer func() {
+		_ = srcFile.Close()
+	}()
+
+	srcInfo, err := srcFile.Stat()
+	if err != nil {
+		log.Errorf("failed to get %s info: %s", srcScript, err)
+		return err
+	}
+
+	// create and copy to temporary file
+	tmpFile, err := os.CreateTemp("/etc/init.d/", ".S03usbdev-")
+	if err != nil {
+		log.Errorf("failed to create temp %s: %s", USBDevScript, err)
+		return err
+	}
+	tmpPath := tmpFile.Name()
+	defer func() {
+		_ = os.Remove(tmpPath)
+	}()
+	log.Debugf("create temporary file: %s", tmpPath)
+
+	if err := tmpFile.Chmod(srcInfo.Mode()); err != nil {
+		_ = tmpFile.Close()
+		log.Errorf("failed to set %s mode: %s", tmpPath, err)
+		return err
+	}
+
+	if _, err := io.Copy(tmpFile, srcFile); err != nil {
+		_ = tmpFile.Close()
+		log.Errorf("failed to copy %s: %s", srcScript, err)
+		return err
+	}
+
+	if err := tmpFile.Sync(); err != nil {
+		_ = tmpFile.Close()
+		log.Errorf("failed to sync %s: %s", tmpPath, err)
+		return err
+	}
+
+	if err := tmpFile.Close(); err != nil {
+		log.Errorf("failed to close %s: %s", tmpPath, err)
+		return err
+	}
+
+	// replace the target file with the temporary file
+	if err := os.Rename(tmpPath, USBDevScript); err != nil {
+		log.Errorf("failed to rename %s: %s", tmpPath, err)
+		return err
+	}
+
+	log.Debugf("copy %s to %s successful", srcScript, USBDevScript)
+	return nil
+}
+
+func getHidMode() (string, error) {
+	data, err := os.ReadFile(ModeFlag)
+	if err != nil {
+		log.Errorf("failed to read %s: %s", ModeFlag, err)
+		return "", err
+	}
+
+	key := strings.TrimSpace(string(data))
+	mode, ok := modeMap[key]
+	if !ok {
+		log.Errorf("invalid mode flag: %s", key)
+		return "", errors.New("invalid mode flag")
+	}
+
+	return mode, nil
+}