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[client/idd] input: synchronize keyboard LEDs

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Report guest HID keyboard LED state from LGInput to LGIdd and
publish it with the LGMP input endpoint status.

Forward SPICE modifier updates through the same provider state so evdev
can synchronize physical keyboard LEDs across transport changes and
reconnects.

Bump the versioned pipe and KVMFR input status contracts for the new
feedback state.

Accept earlier LGMP input status versions without LED feedback so the
client retains input while the guest driver is being upgraded.
This commit is contained in:
Geoffrey McRae
2026-08-21 05:06:59 +10:00
parent 1a5bdc14aa
commit 71733433ed
20 changed files with 425 additions and 44 deletions
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12
idd/LGCommon/InputPipeProtocol.h
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@@ -29,7 +29,7 @@ static constexpr wchar_t LG_INPUT_PIPE_NAME[] =
L"\\\\.\\pipe\\LookingGlassIDDInput";
static constexpr uint32_t LG_INPUT_PIPE_MAGIC = 0x5049474c;
static constexpr uint16_t LG_INPUT_PIPE_VERSION = 3;
static constexpr uint16_t LG_INPUT_PIPE_VERSION = 4;
static constexpr size_t LG_INPUT_PIPE_MAX_PAYLOAD_SIZE = 64;
static constexpr uint16_t LG_INPUT_MOUSE_ABSOLUTE_MAX =
KVMFR_INPUT_MOUSE_ABSOLUTE_MAX;
@@ -67,9 +67,12 @@ enum LGInputKeyboardModifier : uint8_t
enum LGInputPipeMessageType : uint16_t
{
// LGIdd to LGInput.
LG_INPUT_PIPE_MESSAGE_MOUSE_ABSOLUTE = 1,
LG_INPUT_PIPE_MESSAGE_MOUSE_RELATIVE = 2,
LG_INPUT_PIPE_MESSAGE_KEYBOARD = 3,
// LGInput to LGIdd.
LG_INPUT_PIPE_MESSAGE_KEYBOARD_LEDS = 4,
};
#pragma pack(push, 1)
@@ -88,11 +91,18 @@ using LGInputPipeMouseRelative = KVMFRInputMouseRelative;
using LGInputPipeMouseAbsolute = KVMFRInputMouseAbsolute;
using LGInputPipeKeyboard = KVMFRInputKeyboard;
struct LGInputPipeKeyboardLEDs
{
KVMFRInputKeyboardLEDFlags leds;
};
static_assert(sizeof(LGInputPipeMouseRelative) == 16,
"LGInputPipeMouseRelative wire layout changed");
static_assert(sizeof(LGInputPipeMouseAbsolute) == 16,
"LGInputPipeMouseAbsolute wire layout changed");
static_assert(sizeof(LGInputPipeKeyboard) == 16,
"LGInputPipeKeyboard wire layout changed");
static_assert(sizeof(LGInputPipeKeyboardLEDs) == 1,
"LGInputPipeKeyboardLEDs wire layout changed");
static_assert(sizeof(LGInputPipeMessage) == 84,
"LGInputPipeMessage wire layout changed");