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a41166bb37
Instead of comparing the game ID, revision, disc number and name, we can compare a hash of important parts of the disc including all the aforementioned data but also additional data such as the FST. The primary reason why I'm making this change is to let us catch more desyncs before they happen, but this should also fix https://bugs.dolphin-emu.org/issues/12115. As a bonus, the UI can now distinguish the case where a client doesn't have the game at all from the case where a client has the wrong version of the game.
130 lines
3.7 KiB
C++
130 lines
3.7 KiB
C++
// Copyright 2020 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "DiscIO/VolumeDisc.h"
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#include <memory>
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#include <optional>
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#include <string>
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#include <vector>
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#include <mbedtls/sha1.h>
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#include "Common/CommonTypes.h"
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#include "DiscIO/DiscExtractor.h"
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#include "DiscIO/Enums.h"
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#include "DiscIO/Filesystem.h"
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namespace DiscIO
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{
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std::string VolumeDisc::GetGameID(const Partition& partition) const
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{
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char id[6];
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if (!Read(0, sizeof(id), reinterpret_cast<u8*>(id), partition))
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return std::string();
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return DecodeString(id);
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}
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Country VolumeDisc::GetCountry(const Partition& partition) const
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{
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// The 0 that we use as a default value is mapped to Country::Unknown and Region::Unknown
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const u8 country_byte = ReadSwapped<u8>(3, partition).value_or(0);
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const Region region = GetRegion();
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const std::optional<u16> revision = GetRevision();
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if (CountryCodeToRegion(country_byte, GetVolumeType(), region, revision) != region)
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return TypicalCountryForRegion(region);
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return CountryCodeToCountry(country_byte, GetVolumeType(), region, revision);
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}
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Region VolumeDisc::RegionCodeToRegion(std::optional<u32> region_code) const
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{
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if (!region_code)
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return Region::Unknown;
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const Region region = static_cast<Region>(*region_code);
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return region <= Region::NTSC_K ? region : Region::Unknown;
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}
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std::string VolumeDisc::GetMakerID(const Partition& partition) const
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{
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char maker_id[2];
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if (!Read(0x4, sizeof(maker_id), reinterpret_cast<u8*>(&maker_id), partition))
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return std::string();
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return DecodeString(maker_id);
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}
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std::optional<u16> VolumeDisc::GetRevision(const Partition& partition) const
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{
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std::optional<u8> revision = ReadSwapped<u8>(7, partition);
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return revision ? *revision : std::optional<u16>();
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}
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std::string VolumeDisc::GetInternalName(const Partition& partition) const
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{
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char name[0x60];
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if (!Read(0x20, sizeof(name), reinterpret_cast<u8*>(&name), partition))
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return std::string();
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return DecodeString(name);
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}
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std::string VolumeDisc::GetApploaderDate(const Partition& partition) const
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{
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char date[16];
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if (!Read(0x2440, sizeof(date), reinterpret_cast<u8*>(&date), partition))
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return std::string();
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return DecodeString(date);
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}
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std::optional<u8> VolumeDisc::GetDiscNumber(const Partition& partition) const
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{
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return ReadSwapped<u8>(6, partition);
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}
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bool VolumeDisc::IsNKit() const
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{
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constexpr u32 NKIT_MAGIC = 0x4E4B4954; // "NKIT"
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return ReadSwapped<u32>(0x200, PARTITION_NONE) == NKIT_MAGIC;
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}
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void VolumeDisc::AddGamePartitionToSyncHash(mbedtls_sha1_context* context) const
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{
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const Partition partition = GetGamePartition();
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// All headers at the beginning of the partition, plus the apploader
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ReadAndAddToSyncHash(context, 0, 0x2440 + GetApploaderSize(*this, partition).value_or(0),
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partition);
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// Boot DOL (may be missing if this is a Datel disc)
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const std::optional<u64> dol_offset = GetBootDOLOffset(*this, partition);
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if (dol_offset)
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{
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ReadAndAddToSyncHash(context, *dol_offset,
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GetBootDOLSize(*this, partition, *dol_offset).value_or(0), partition);
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}
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// File system
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const std::optional<u64> fst_offset = GetFSTOffset(*this, partition);
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if (fst_offset)
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ReadAndAddToSyncHash(context, *fst_offset, GetFSTSize(*this, partition).value_or(0), partition);
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// opening.bnr (name and banner)
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const FileSystem* file_system = GetFileSystem(partition);
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if (file_system)
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{
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std::unique_ptr<FileInfo> file_info = file_system->FindFileInfo("opening.bnr");
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if (file_info && !file_info->IsDirectory())
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ReadAndAddToSyncHash(context, file_info->GetOffset(), file_info->GetSize(), partition);
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}
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}
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} // namespace DiscIO
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