mirror of https://github.com/jetkvm/kvm.git
96 lines
3.1 KiB
Go
96 lines
3.1 KiB
Go
package usbgadget
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import (
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"fmt"
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"os"
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)
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var keyboardConfig = gadgetConfigItem{
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order: 1000,
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device: "hid.usb0",
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path: []string{"functions", "hid.usb0"},
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configPath: []string{"hid.usb0"},
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attrs: gadgetAttributes{
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"protocol": "1",
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"subclass": "1",
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"report_length": "8",
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},
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reportDesc: keyboardReportDesc,
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}
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// Source: https://www.kernel.org/doc/Documentation/usb/gadget_hid.txt
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var keyboardReportDesc = []byte{
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0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
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0x09, 0x06, /* USAGE (Keyboard) */
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0xa1, 0x01, /* COLLECTION (Application) */
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0x05, 0x07, /* USAGE_PAGE (Keyboard) */
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0x19, 0xe0, /* USAGE_MINIMUM (Keyboard LeftControl) */
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0x29, 0xe7, /* USAGE_MAXIMUM (Keyboard Right GUI) */
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0x15, 0x00, /* LOGICAL_MINIMUM (0) */
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0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
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0x75, 0x01, /* REPORT_SIZE (1) */
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0x95, 0x08, /* REPORT_COUNT (8) */
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0x81, 0x02, /* INPUT (Data,Var,Abs) */
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0x95, 0x01, /* REPORT_COUNT (1) */
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0x75, 0x08, /* REPORT_SIZE (8) */
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0x81, 0x03, /* INPUT (Cnst,Var,Abs) */
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0x95, 0x05, /* REPORT_COUNT (5) */
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0x75, 0x01, /* REPORT_SIZE (1) */
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0x05, 0x08, /* USAGE_PAGE (LEDs) */
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0x19, 0x01, /* USAGE_MINIMUM (Num Lock) */
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0x29, 0x05, /* USAGE_MAXIMUM (Kana) */
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0x91, 0x02, /* OUTPUT (Data,Var,Abs) */
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0x95, 0x01, /* REPORT_COUNT (1) */
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0x75, 0x03, /* REPORT_SIZE (3) */
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0x91, 0x03, /* OUTPUT (Cnst,Var,Abs) */
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0x95, 0x06, /* REPORT_COUNT (6) */
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0x75, 0x08, /* REPORT_SIZE (8) */
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0x15, 0x00, /* LOGICAL_MINIMUM (0) */
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0x25, 0x65, /* LOGICAL_MAXIMUM (101) */
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0x05, 0x07, /* USAGE_PAGE (Keyboard) */
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0x19, 0x00, /* USAGE_MINIMUM (Reserved) */
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0x29, 0x65, /* USAGE_MAXIMUM (Keyboard Application) */
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0x81, 0x00, /* INPUT (Data,Ary,Abs) */
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0xc0, /* END_COLLECTION */
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}
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func (u *UsbGadget) keyboardWriteHidFile(data []byte) error {
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if u.keyboardHidFile == nil {
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var err error
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u.keyboardHidFile, err = os.OpenFile("/dev/hidg0", os.O_RDWR, 0666)
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if err != nil {
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return fmt.Errorf("failed to open hidg0: %w", err)
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}
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}
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_, err := u.keyboardHidFile.Write(data)
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if err != nil {
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u.log.Errorf("failed to write to hidg0: %w", err)
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u.keyboardHidFile.Close()
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u.keyboardHidFile = nil
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return err
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}
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return nil
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}
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func (u *UsbGadget) KeyboardReport(modifier uint8, keys []uint8) error {
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u.keyboardLock.Lock()
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defer u.keyboardLock.Unlock()
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if len(keys) > 6 {
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keys = keys[:6]
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}
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if len(keys) < 6 {
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keys = append(keys, make([]uint8, 6-len(keys))...)
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}
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err := u.keyboardWriteHidFile([]byte{modifier, 0, keys[0], keys[1], keys[2], keys[3], keys[4], keys[5]})
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if err != nil {
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return err
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}
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u.resetUserInputTime()
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return nil
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}
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