增加文件传输功能

demo/windows_sender/FileTransferProtocol.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#include <cstdint>
+
+// Port for TCP Control & File Transfer
+constexpr int FILE_TRANSFER_PORT = 8889;
+
+enum class PacketType : uint8_t {
+    // Control Events
+    Handshake = 0x01,
+    MouseEvent = 0x02,
+    KeyboardEvent = 0x03,
+
+    // File Transfer
+    FileHeader = 0x10, // Metadata: Name, Size
+    FileData = 0x11,   // Chunk of data
+    FileEnd = 0x12,    // End of transfer
+    FileAck = 0x13,    // Acknowledge receipt
+    FileError = 0x14   // Error during transfer
+
+    ,
+    FolderHeader = 0x20,
+    DirEntry = 0x21,
+    FileHeaderV2 = 0x22,
+    FolderEnd = 0x23
+};
+
+#pragma pack(push, 1)
+
+struct CommonHeader {
+    uint8_t type;
+    uint32_t payloadSize;
+};
+
+// Payload for FileHeader (Type 0x10)
+struct FileMetadata {
+    uint64_t fileSize;
+    char fileName[256]; // UTF-8 encoded
+};
+
+// Payload for FileAck (Type 0x13)
+struct FileAckPayload {
+    uint8_t status; // 0 = OK, 1 = Error
+};
+
+#pragma pack(pop)