370 lines
12 KiB
C++
370 lines
12 KiB
C++
#include "content/providers/disk_provider.hpp"
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#include <hex/api/localization.hpp>
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#include <hex/helpers/fmt.hpp>
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#include <hex/helpers/utils.hpp>
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#include <hex/ui/imgui_imhex_extensions.h>
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#include <bitset>
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#include <filesystem>
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#include <imgui.h>
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#if defined(OS_LINUX)
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#define lseek lseek64
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#elif defined(OS_MACOS)
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#endif
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namespace hex::plugin::builtin::prv {
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DiskProvider::DiskProvider() : Provider() {
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}
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bool DiskProvider::isAvailable() const {
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#if defined(OS_WINDOWS)
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return this->m_diskHandle != INVALID_HANDLE_VALUE;
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#else
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return this->m_diskHandle != -1;
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#endif
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}
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bool DiskProvider::isReadable() const {
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return this->m_readable;
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}
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bool DiskProvider::isWritable() const {
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return this->m_writable;
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}
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bool DiskProvider::isResizable() const {
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return false;
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}
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bool DiskProvider::isSavable() const {
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return false;
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}
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void DiskProvider::setPath(const std::fs::path &path) {
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this->m_path = path;
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}
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bool DiskProvider::open() {
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this->m_readable = true;
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this->m_writable = true;
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#if defined(OS_WINDOWS)
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const auto &path = this->m_path.native();
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this->m_diskHandle = reinterpret_cast<HANDLE>(CreateFileW(path.c_str(), GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr));
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if (this->m_diskHandle == INVALID_HANDLE_VALUE) {
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this->m_diskHandle = reinterpret_cast<HANDLE>(CreateFileW(path.c_str(), GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr));
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this->m_writable = false;
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if (this->m_diskHandle == INVALID_HANDLE_VALUE)
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return false;
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}
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{
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DISK_GEOMETRY_EX diskGeometry = { };
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DWORD bytesRead = 0;
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if (DeviceIoControl(
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this->m_diskHandle,
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IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
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nullptr,
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0,
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&diskGeometry,
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sizeof(DISK_GEOMETRY_EX),
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&bytesRead,
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nullptr)) {
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this->m_diskSize = diskGeometry.DiskSize.QuadPart;
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this->m_sectorSize = diskGeometry.Geometry.BytesPerSector;
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this->m_sectorBuffer.resize(this->m_sectorSize);
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}
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}
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if (this->m_diskHandle == nullptr || this->m_diskHandle == INVALID_HANDLE_VALUE) {
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this->m_readable = false;
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this->m_diskHandle = nullptr;
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CloseHandle(this->m_diskHandle);
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return false;
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}
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#else
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const auto &path = this->m_path.native();
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struct stat driveStat;
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if (::stat(path.c_str(), &driveStat) == 0)
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this->m_diskSize = driveStat.st_size;
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else
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this->m_diskSize = 0;
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this->m_sectorSize = 0;
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this->m_diskHandle = ::open(path.c_str(), O_RDWR);
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if (this->m_diskHandle == -1) {
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this->m_diskHandle = ::open(path.c_str(), O_RDONLY);
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this->m_writable = false;
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}
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if (this->m_diskHandle == -1) {
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this->m_readable = false;
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return false;
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}
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#endif
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return true;
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}
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void DiskProvider::close() {
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#if defined(OS_WINDOWS)
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if (this->m_diskHandle != INVALID_HANDLE_VALUE)
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::CloseHandle(this->m_diskHandle);
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this->m_diskHandle = INVALID_HANDLE_VALUE;
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#else
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if (this->m_diskHandle != -1)
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::close(this->m_diskHandle);
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this->m_diskHandle = -1;
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#endif
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}
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void DiskProvider::readRaw(u64 offset, void *buffer, size_t size) {
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#if defined(OS_WINDOWS)
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DWORD bytesRead = 0;
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u64 startOffset = offset;
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while (size > 0) {
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LARGE_INTEGER seekPosition;
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seekPosition.LowPart = (offset & 0xFFFF'FFFF) - (offset % this->m_sectorSize);
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seekPosition.HighPart = offset >> 32;
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if (this->m_sectorBufferAddress != static_cast<u64>(seekPosition.QuadPart)) {
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::SetFilePointer(this->m_diskHandle, seekPosition.LowPart, &seekPosition.HighPart, FILE_BEGIN);
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::ReadFile(this->m_diskHandle, this->m_sectorBuffer.data(), this->m_sectorBuffer.size(), &bytesRead, nullptr);
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this->m_sectorBufferAddress = seekPosition.QuadPart;
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}
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std::memcpy(reinterpret_cast<u8 *>(buffer) + (offset - startOffset), this->m_sectorBuffer.data() + (offset & (this->m_sectorSize - 1)), std::min(this->m_sectorSize, size));
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size = std::max<ssize_t>(static_cast<ssize_t>(size) - this->m_sectorSize, 0);
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offset += this->m_sectorSize;
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}
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#else
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u64 startOffset = offset;
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while (size > 0) {
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u64 seekPosition = offset - (offset % this->m_sectorSize);
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if (this->m_sectorBufferAddress != seekPosition) {
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::lseek(this->m_diskHandle, seekPosition, SEEK_SET);
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if (::read(this->m_diskHandle, buffer, size) < 0)
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break;
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this->m_sectorBufferAddress = seekPosition;
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}
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std::memcpy(reinterpret_cast<u8 *>(buffer) + (offset - startOffset), this->m_sectorBuffer.data() + (offset & (this->m_sectorSize - 1)), std::min(this->m_sectorSize, size));
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size = std::max<ssize_t>(static_cast<ssize_t>(size) - this->m_sectorSize, 0);
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offset += this->m_sectorSize;
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}
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#endif
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}
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void DiskProvider::writeRaw(u64 offset, const void *buffer, size_t size) {
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#if defined(OS_WINDOWS)
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DWORD bytesWritten = 0;
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u64 startOffset = offset;
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std::vector<u8> modifiedSectorBuffer;
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modifiedSectorBuffer.resize(this->m_sectorSize);
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while (size > 0) {
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u64 sectorBase = offset - (offset % this->m_sectorSize);
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size_t currSize = std::min(size, this->m_sectorSize);
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this->readRaw(sectorBase, modifiedSectorBuffer.data(), modifiedSectorBuffer.size());
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std::memcpy(modifiedSectorBuffer.data() + ((offset - sectorBase) % this->m_sectorSize), reinterpret_cast<const u8 *>(buffer) + (startOffset - offset), currSize);
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LARGE_INTEGER seekPosition;
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seekPosition.LowPart = (offset & 0xFFFF'FFFF) - (offset % this->m_sectorSize);
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seekPosition.HighPart = offset >> 32;
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::SetFilePointer(this->m_diskHandle, seekPosition.LowPart, &seekPosition.HighPart, FILE_BEGIN);
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::WriteFile(this->m_diskHandle, modifiedSectorBuffer.data(), modifiedSectorBuffer.size(), &bytesWritten, nullptr);
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offset += currSize;
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size -= currSize;
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}
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#else
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u64 startOffset = offset;
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std::vector<u8> modifiedSectorBuffer;
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modifiedSectorBuffer.resize(this->m_sectorSize);
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while (size > 0) {
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u64 sectorBase = offset - (offset % this->m_sectorSize);
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size_t currSize = std::min(size, this->m_sectorSize);
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this->readRaw(sectorBase, modifiedSectorBuffer.data(), modifiedSectorBuffer.size());
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std::memcpy(modifiedSectorBuffer.data() + ((offset - sectorBase) % this->m_sectorSize), reinterpret_cast<const u8 *>(buffer) + (startOffset - offset), currSize);
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::lseek(this->m_diskHandle, sectorBase, SEEK_SET);
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if (::write(this->m_diskHandle, modifiedSectorBuffer.data(), modifiedSectorBuffer.size()) < 0)
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break;
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offset += currSize;
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size -= currSize;
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}
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#endif
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}
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size_t DiskProvider::getActualSize() const {
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return this->m_diskSize;
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}
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std::string DiskProvider::getName() const {
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return this->m_path.string();
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}
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std::vector<std::pair<std::string, std::string>> DiskProvider::getDataInformation() const {
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return {
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{"hex.builtin.provider.disk.selected_disk"_lang, this->m_path.string() },
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{ "hex.builtin.provider.disk.disk_size"_lang, hex::toByteString(this->m_diskSize) },
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{ "hex.builtin.provider.disk.sector_size"_lang, hex::toByteString(this->m_sectorSize)}
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};
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}
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void DiskProvider::reloadDrives() {
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#if defined(OS_WINDOWS)
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this->m_availableDrives.clear();
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std::bitset<32> drives = ::GetLogicalDrives();
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for (char i = 0; i < 26; i++) {
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if (drives[i])
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this->m_availableDrives.insert(hex::format(R"(\\.\{:c}:)", 'A' + i));
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}
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auto logicalDrives = this->m_availableDrives;
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for (const auto &drive : logicalDrives) {
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auto handle = reinterpret_cast<HANDLE>(::CreateFile(drive.data(), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_EXISTING, 0, nullptr));
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if (handle == INVALID_HANDLE_VALUE) continue;
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VOLUME_DISK_EXTENTS diskExtents = { };
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DWORD bytesRead = 0;
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auto result = ::DeviceIoControl(
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handle,
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IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS,
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nullptr,
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0,
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&diskExtents,
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sizeof(VOLUME_DISK_EXTENTS),
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&bytesRead,
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nullptr);
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if (result) {
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auto diskPath = hex::format(R"(\\.\PhysicalDrive{})", diskExtents.Extents[0].DiskNumber);
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this->m_availableDrives.insert(diskPath);
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}
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::CloseHandle(handle);
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}
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#endif
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}
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void DiskProvider::drawLoadInterface() {
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#if defined(OS_WINDOWS)
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if (this->m_availableDrives.empty())
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this->reloadDrives();
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if (ImGui::BeginListBox("hex.builtin.provider.disk.selected_disk"_lang)) {
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for (const auto &drive : this->m_availableDrives) {
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if (ImGui::Selectable(drive.c_str(), this->m_path == drive))
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this->m_path = drive;
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}
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ImGui::EndListBox();
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}
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ImGui::SameLine();
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if (ImGui::Button("hex.builtin.provider.disk.reload"_lang)) {
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this->reloadDrives();
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}
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#else
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if (ImGui::InputText("hex.builtin.provider.disk.selected_disk"_lang, this->m_pathBuffer.data(), this->m_pathBuffer.size(), ImGuiInputTextFlags_CallbackResize, ImGui::UpdateStringSizeCallback, &this->m_pathBuffer))
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this->m_path = this->m_pathBuffer;
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#endif
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}
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nlohmann::json DiskProvider::storeSettings(nlohmann::json settings) const {
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settings["path"] = this->m_path.string();
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return Provider::storeSettings(settings);
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}
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void DiskProvider::loadSettings(const nlohmann::json &settings) {
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Provider::loadSettings(settings);
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this->setPath(settings["path"].get<std::string>());
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this->reloadDrives();
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}
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std::pair<Region, bool> DiskProvider::getRegionValidity(u64 address) const {
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address -= this->getBaseAddress();
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if (address < this->getActualSize())
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return { Region { this->getBaseAddress() + address, this->getActualSize() - address }, true };
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else
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return { Region::Invalid(), false };
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}
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} |