1 files changed, 111 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-graphics/obmc-ikvm/obmc-ikvm/ikvm_input.hpp b/meta-openbmc-mods/meta-common/recipes-graphics/obmc-ikvm/obmc-ikvm/ikvm_input.hpp
new file mode 100644
index 000000000..f7413a4cd
--- /dev/null
+++ b/meta-openbmc-mods/meta-common/recipes-graphics/obmc-ikvm/obmc-ikvm/ikvm_input.hpp
@@ -0,0 +1,111 @@
+#pragma once
+
+#include <rfb/rfb.h>
+
+#include <map>
+#include <string>
+
+namespace ikvm
+{
+
+/*
+ * @class Input
+ * @brief Receives events from RFB clients and sends reports to the USB input
+ *        device
+ */
+class Input
+{
+  public:
+    /*
+     * @brief Constructs Input object
+     *
+     * @param[in] kbdPath - Path to the USB keyboard device
+     * @param[in] ptrPath - Path to the USB mouse device
+     */
+    Input(const std::string& kbdPath, const std::string& ptrPath);
+    ~Input();
+    Input(const Input&) = default;
+    Input& operator=(const Input&) = default;
+    Input(Input&&) = default;
+    Input& operator=(Input&&) = default;
+
+    /*
+     * @brief RFB client key event handler
+     *
+     * @param[in] down - Boolean indicating whether key is pressed or not
+     * @param[in] key  - Key code
+     * @param[in] cl   - Handle to the RFB client
+     */
+    static void keyEvent(rfbBool down, rfbKeySym key, rfbClientPtr cl);
+    /*
+     * @brief RFB client pointer event handler
+     *
+     * @param[in] buttonMask - Bitmask indicating which buttons have been
+     *                         pressed
+     * @param[in] x          - Pointer x-coordinate
+     * @param[in] y          - Pointer y-coordinate
+     * @param[in] cl         - Handle to the RFB client
+     */
+    static void pointerEvent(int buttonMask, int x, int y, rfbClientPtr cl);
+
+    /* @brief Sends a wakeup data packet to the USB input device */
+    void sendWakeupPacket();
+    /* @brief Sends an HID report to the USB input device */
+    void sendReport();
+
+  private:
+    static constexpr int NUM_MODIFIER_BITS = 4;
+    static constexpr int KEY_REPORT_LENGTH = 8;
+    static constexpr int PTR_REPORT_LENGTH = 5;
+
+    /* @brief HID modifier bits mapped to shift and control key codes */
+    static constexpr uint8_t shiftCtrlMap[NUM_MODIFIER_BITS] = {
+        0x02, // left shift
+        0x20, // right shift
+        0x01, // left control
+        0x10  // right control
+    };
+    /* @brief HID modifier bits mapped to meta and alt key codes */
+    static constexpr uint8_t metaAltMap[NUM_MODIFIER_BITS] = {
+        0x08, // left meta
+        0x80, // right meta
+        0x04, // left alt
+        0x40  // right alt
+    };
+    /*
+     * @brief Translates a RFB-specific key code to HID modifier bit
+     *
+     * @param[in] key - key code
+     */
+    static uint8_t keyToMod(rfbKeySym key);
+    /*
+     * @brief Translates a RFB-specific key code to HID scancode
+     *
+     * @param[in] key - key code
+     */
+    static uint8_t keyToScancode(rfbKeySym key);
+
+    /* @brief Indicates whether or not to send a keyboard report */
+    bool sendKeyboard;
+    /* @brief Indicates whether or not to send a pointer report */
+    bool sendPointer;
+    /* @brief File descriptor for the USB keyboard device */
+    int keyboardFd;
+    /* @brief File descriptor for the USB mouse device */
+    int pointerFd;
+    /* @brief Data for keyboard report */
+    uint8_t keyboardReport[KEY_REPORT_LENGTH];
+    /* @brief Data for pointer report */
+    uint8_t pointerReport[PTR_REPORT_LENGTH];
+    /* @brief Path to the USB keyboard device */
+    std::string keyboardPath;
+    /* @brief Path to the USB mouse device */
+    std::string pointerPath;
+    /*
+     * @brief Mapping of RFB key code to report data index to keep track
+     *        of which keys are down
+     */
+    std::map<int, int> keysDown;
+};
+
+} // namespace ikvm