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transmission/libtransmission/resume.cc

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// This file Copyright © 2008-2022 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#include <algorithm>
#include <cstring>
#include <ctime>
#include <string_view>
#include <vector>
#include <fmt/core.h>
#include <fmt/format.h> // fmt::ptr
#include "transmission.h"
#include "error.h"
#include "file.h"
#include "log.h"
#include "magnet-metainfo.h"
#include "peer-mgr.h" /* pex */
#include "resume.h"
#include "session.h"
#include "torrent.h"
#include "tr-assert.h"
#include "utils.h"
#include "variant.h"
using namespace std::literals;
namespace
{
constexpr int MAX_REMEMBERED_PEERS = 200;
} // unnamed namespace
/***
****
***/
static void savePeers(tr_variant* dict, tr_torrent const* tor)
{
tr_pex* pex = nullptr;
int count = tr_peerMgrGetPeers(tor, &pex, TR_AF_INET, TR_PEERS_INTERESTING, MAX_REMEMBERED_PEERS);
if (count > 0)
{
tr_variantDictAddRaw(dict, TR_KEY_peers2, pex, sizeof(tr_pex) * count);
}
tr_free(pex);
count = tr_peerMgrGetPeers(tor, &pex, TR_AF_INET6, TR_PEERS_INTERESTING, MAX_REMEMBERED_PEERS);
if (count > 0)
{
tr_variantDictAddRaw(dict, TR_KEY_peers2_6, pex, sizeof(tr_pex) * count);
}
tr_free(pex);
}
static size_t addPeers(tr_torrent* tor, uint8_t const* buf, size_t buflen)
{
size_t const n_in = buflen / sizeof(tr_pex);
size_t const n_pex = std::min(n_in, size_t{ MAX_REMEMBERED_PEERS });
tr_pex pex[MAX_REMEMBERED_PEERS];
memcpy(pex, buf, sizeof(tr_pex) * n_pex);
return tr_peerMgrAddPex(tor, TR_PEER_FROM_RESUME, pex, n_pex);
}
static auto loadPeers(tr_variant* dict, tr_torrent* tor)
{
auto ret = tr_resume::fields_t{};
uint8_t const* str = nullptr;
auto len = size_t{};
if (tr_variantDictFindRaw(dict, TR_KEY_peers2, &str, &len))
{
size_t const numAdded = addPeers(tor, str, len);
tr_logAddTraceTor(tor, fmt::format("Loaded {} IPv4 peers from resume file", numAdded));
ret = tr_resume::Peers;
}
if (tr_variantDictFindRaw(dict, TR_KEY_peers2_6, &str, &len))
{
size_t const numAdded = addPeers(tor, str, len);
tr_logAddTraceTor(tor, fmt::format("Loaded {} IPv6 peers from resume file", numAdded));
ret = tr_resume::Peers;
}
return ret;
}
/***
****
***/
static void saveLabels(tr_variant* dict, tr_torrent const* tor)
{
auto const& labels = tor->labels;
tr_variant* list = tr_variantDictAddList(dict, TR_KEY_labels, std::size(labels));
for (auto const& label : labels)
{
tr_variantListAddStr(list, label);
}
}
static auto loadLabels(tr_variant* dict, tr_torrent* tor)
{
tr_variant* list = nullptr;
if (!tr_variantDictFindList(dict, TR_KEY_labels, &list))
{
return tr_resume::fields_t{};
}
int const n = tr_variantListSize(list);
for (int i = 0; i < n; ++i)
{
auto sv = std::string_view{};
if (tr_variantGetStrView(tr_variantListChild(list, i), &sv) && !std::empty(sv))
{
tor->labels.emplace(sv);
}
}
return tr_resume::Labels;
}
/***
****
***/
static void saveDND(tr_variant* dict, tr_torrent const* tor)
{
auto const n = tor->fileCount();
tr_variant* const list = tr_variantDictAddList(dict, TR_KEY_dnd, n);
for (tr_file_index_t i = 0; i < n; ++i)
{
tr_variantListAddBool(list, !tr_torrentFile(tor, i).wanted);
}
}
static auto loadDND(tr_variant* dict, tr_torrent* tor)
{
auto ret = tr_resume::fields_t{};
tr_variant* list = nullptr;
auto const n = tor->fileCount();
if (tr_variantDictFindList(dict, TR_KEY_dnd, &list) && tr_variantListSize(list) == n)
{
auto wanted = std::vector<tr_file_index_t>{};
auto unwanted = std::vector<tr_file_index_t>{};
wanted.reserve(n);
unwanted.reserve(n);
for (tr_file_index_t i = 0; i < n; ++i)
{
auto tmp = false;
if (tr_variantGetBool(tr_variantListChild(list, i), &tmp) && tmp)
{
unwanted.push_back(i);
}
else
{
wanted.push_back(i);
}
}
tor->initFilesWanted(std::data(unwanted), std::size(unwanted), false);
tor->initFilesWanted(std::data(wanted), std::size(wanted), true);
ret = tr_resume::Dnd;
}
else
{
tr_logAddDebugTor(
tor,
fmt::format(
"Couldn't load DND flags. DND list {} has {} children; torrent has {} files",
fmt::ptr(list),
tr_variantListSize(list),
n));
}
return ret;
}
/***
****
***/
static void saveFilePriorities(tr_variant* dict, tr_torrent const* tor)
{
auto const n = tor->fileCount();
tr_variant* const list = tr_variantDictAddList(dict, TR_KEY_priority, n);
for (tr_file_index_t i = 0; i < n; ++i)
{
tr_variantListAddInt(list, tr_torrentFile(tor, i).priority);
}
}
static auto loadFilePriorities(tr_variant* dict, tr_torrent* tor)
{
auto ret = tr_resume::fields_t{};
auto const n = tor->fileCount();
tr_variant* list = nullptr;
if (tr_variantDictFindList(dict, TR_KEY_priority, &list) && tr_variantListSize(list) == n)
{
for (tr_file_index_t i = 0; i < n; ++i)
{
auto priority = int64_t{};
if (tr_variantGetInt(tr_variantListChild(list, i), &priority))
{
tor->setFilePriority(i, tr_priority_t(priority));
}
}
ret = tr_resume::FilePriorities;
}
return ret;
}
/***
****
***/
static void saveSingleSpeedLimit(tr_variant* d, tr_torrent* tor, tr_direction dir)
{
tr_variantDictReserve(d, 3);
tr_variantDictAddInt(d, TR_KEY_speed_Bps, tor->speedLimitBps(dir));
tr_variantDictAddBool(d, TR_KEY_use_global_speed_limit, tr_torrentUsesSessionLimits(tor));
tr_variantDictAddBool(d, TR_KEY_use_speed_limit, tr_torrentUsesSpeedLimit(tor, dir));
}
static void saveSpeedLimits(tr_variant* dict, tr_torrent* tor)
{
saveSingleSpeedLimit(tr_variantDictAddDict(dict, TR_KEY_speed_limit_down, 0), tor, TR_DOWN);
saveSingleSpeedLimit(tr_variantDictAddDict(dict, TR_KEY_speed_limit_up, 0), tor, TR_UP);
}
static void saveRatioLimits(tr_variant* dict, tr_torrent* tor)
{
tr_variant* d = tr_variantDictAddDict(dict, TR_KEY_ratio_limit, 2);
tr_variantDictAddReal(d, TR_KEY_ratio_limit, tr_torrentGetRatioLimit(tor));
tr_variantDictAddInt(d, TR_KEY_ratio_mode, tr_torrentGetRatioMode(tor));
}
static void saveIdleLimits(tr_variant* dict, tr_torrent* tor)
{
tr_variant* d = tr_variantDictAddDict(dict, TR_KEY_idle_limit, 2);
tr_variantDictAddInt(d, TR_KEY_idle_limit, tr_torrentGetIdleLimit(tor));
tr_variantDictAddInt(d, TR_KEY_idle_mode, tr_torrentGetIdleMode(tor));
}
static void loadSingleSpeedLimit(tr_variant* d, tr_direction dir, tr_torrent* tor)
{
auto i = int64_t{};
auto boolVal = false;
if (tr_variantDictFindInt(d, TR_KEY_speed_Bps, &i))
{
tor->setSpeedLimitBps(dir, i);
}
else if (tr_variantDictFindInt(d, TR_KEY_speed, &i))
{
tor->setSpeedLimitBps(dir, i * 1024);
}
if (tr_variantDictFindBool(d, TR_KEY_use_speed_limit, &boolVal))
{
tr_torrentUseSpeedLimit(tor, dir, boolVal);
}
if (tr_variantDictFindBool(d, TR_KEY_use_global_speed_limit, &boolVal))
{
tr_torrentUseSessionLimits(tor, boolVal);
}
}
static auto loadSpeedLimits(tr_variant* dict, tr_torrent* tor)
{
auto ret = tr_resume::fields_t{};
tr_variant* d = nullptr;
if (tr_variantDictFindDict(dict, TR_KEY_speed_limit_up, &d))
{
loadSingleSpeedLimit(d, TR_UP, tor);
ret = tr_resume::Speedlimit;
}
if (tr_variantDictFindDict(dict, TR_KEY_speed_limit_down, &d))
{
loadSingleSpeedLimit(d, TR_DOWN, tor);
ret = tr_resume::Speedlimit;
}
return ret;
}
static auto loadRatioLimits(tr_variant* dict, tr_torrent* tor)
{
auto ret = tr_resume::fields_t{};
if (tr_variant* d = nullptr; tr_variantDictFindDict(dict, TR_KEY_ratio_limit, &d))
{
if (auto dratio = double{}; tr_variantDictFindReal(d, TR_KEY_ratio_limit, &dratio))
{
tr_torrentSetRatioLimit(tor, dratio);
}
if (auto i = int64_t{}; tr_variantDictFindInt(d, TR_KEY_ratio_mode, &i))
{
tr_torrentSetRatioMode(tor, tr_ratiolimit(i));
}
ret = tr_resume::Ratiolimit;
}
return ret;
}
static auto loadIdleLimits(tr_variant* dict, tr_torrent* tor)
{
auto ret = tr_resume::fields_t{};
if (tr_variant* d = nullptr; tr_variantDictFindDict(dict, TR_KEY_idle_limit, &d))
{
if (auto imin = int64_t{}; tr_variantDictFindInt(d, TR_KEY_idle_limit, &imin))
{
tr_torrentSetIdleLimit(tor, imin);
}
if (auto i = int64_t{}; tr_variantDictFindInt(d, TR_KEY_idle_mode, &i))
{
tr_torrentSetIdleMode(tor, tr_idlelimit(i));
}
ret = tr_resume::Idlelimit;
}
return ret;
}
/***
****
***/
static void saveName(tr_variant* dict, tr_torrent const* tor)
{
tr_variantDictAddStrView(dict, TR_KEY_name, tr_torrentName(tor));
}
static auto loadName(tr_variant* dict, tr_torrent* tor)
{
auto ret = tr_resume::fields_t{};
auto name = std::string_view{};
if (!tr_variantDictFindStrView(dict, TR_KEY_name, &name))
{
return ret;
}
name = tr_strvStrip(name);
if (std::empty(name))
{
return ret;
}
tor->setName(name);
ret |= tr_resume::Name;
return ret;
}
/***
****
***/
static void saveFilenames(tr_variant* dict, tr_torrent const* tor)
{
auto const n = tor->fileCount();
tr_variant* const list = tr_variantDictAddList(dict, TR_KEY_files, n);
for (tr_file_index_t i = 0; i < n; ++i)
{
tr_variantListAddStrView(list, tor->fileSubpath(i));
}
}
static auto loadFilenames(tr_variant* dict, tr_torrent* tor)
{
auto ret = tr_resume::fields_t{};
tr_variant* list = nullptr;
if (!tr_variantDictFindList(dict, TR_KEY_files, &list))
{
return ret;
}
auto const n_files = tor->fileCount();
auto const n_list = tr_variantListSize(list);
for (size_t i = 0; i < n_files && i < n_list; ++i)
{
auto sv = std::string_view{};
if (tr_variantGetStrView(tr_variantListChild(list, i), &sv) && !std::empty(sv))
{
tor->setFileSubpath(i, sv);
}
}
ret |= tr_resume::Filenames;
return ret;
}
/***
****
***/
static void bitfieldToRaw(tr_bitfield const& b, tr_variant* benc)
{
if (b.hasNone() || (std::empty(b) != 0U))
{
tr_variantInitStr(benc, "none"sv);
}
else if (b.hasAll())
{
tr_variantInitStrView(benc, "all"sv);
}
else
{
auto const raw = b.raw();
tr_variantInitRaw(benc, raw.data(), std::size(raw));
}
}
static void rawToBitfield(tr_bitfield& bitfield, uint8_t const* raw, size_t rawlen)
{
if (raw == nullptr || rawlen == 0 || (rawlen == 4 && memcmp(raw, "none", 4) == 0))
{
bitfield.setHasNone();
}
else if (rawlen == 3 && memcmp(raw, "all", 3) == 0)
{
bitfield.setHasAll();
}
else
{
bitfield.setRaw(raw, rawlen);
}
}
static void saveProgress(tr_variant* dict, tr_torrent const* tor)
{
tr_variant* const prog = tr_variantDictAddDict(dict, TR_KEY_progress, 4);
// add the mtimes
auto const& mtimes = tor->file_mtimes_;
auto const n = std::size(mtimes);
tr_variant* const l = tr_variantDictAddList(prog, TR_KEY_mtimes, n);
for (auto const& mtime : mtimes)
{
tr_variantListAddInt(l, mtime);
}
// add the 'checked pieces' bitfield
bitfieldToRaw(tor->checked_pieces_, tr_variantDictAdd(prog, TR_KEY_pieces));
/* add the progress */
if (tor->completeness == TR_SEED)
{
tr_variantDictAddStrView(prog, TR_KEY_have, "all"sv);
}
/* add the blocks bitfield */
bitfieldToRaw(tor->blocks(), tr_variantDictAdd(prog, TR_KEY_blocks));
}
/*
* Transmisison has iterated through a few strategies here, so the
* code has some added complexity to support older approaches.
*
* Current approach: 'progress' is a dict with two entries:
* - 'pieces' a bitfield for whether each piece has been checked.
* - 'mtimes', an array of per-file timestamps
* On startup, 'pieces' is loaded. Then we check to see if the disk
* mtimes differ from the 'mtimes' list. Changed files have their
* pieces cleared from the bitset.
*
* Second approach (2.20 - 3.00): the 'progress' dict had a
* 'time_checked' entry which was a list with fileCount items.
* Each item was either a list of per-piece timestamps, or a
* single timestamp if either all or none of the pieces had been
* tested more recently than the file's mtime.
*
* First approach (pre-2.20) had an "mtimes" list identical to
* 3.10, but not the 'pieces' bitfield.
*/
static auto loadProgress(tr_variant* dict, tr_torrent* tor)
{
if (tr_variant* prog = nullptr; tr_variantDictFindDict(dict, TR_KEY_progress, &prog))
{
/// CHECKED PIECES
auto checked = tr_bitfield(tor->pieceCount());
auto mtimes = std::vector<time_t>{};
auto const n_files = tor->fileCount();
mtimes.reserve(n_files);
// try to load mtimes
tr_variant* l = nullptr;
if (tr_variantDictFindList(prog, TR_KEY_mtimes, &l))
{
auto fi = size_t{};
auto t = int64_t{};
while (tr_variantGetInt(tr_variantListChild(l, fi++), &t))
{
mtimes.push_back(t);
}
}
// try to load the piece-checked bitfield
uint8_t const* raw = nullptr;
auto rawlen = size_t{};
if (tr_variantDictFindRaw(prog, TR_KEY_pieces, &raw, &rawlen))
{
rawToBitfield(checked, raw, rawlen);
}
// maybe it's a .resume file from [2.20 - 3.00] with the per-piece mtimes
if (tr_variantDictFindList(prog, TR_KEY_time_checked, &l))
{
for (tr_file_index_t fi = 0; fi < n_files; ++fi)
{
tr_variant* const b = tr_variantListChild(l, fi);
auto time_checked = time_t{};
if (tr_variantIsInt(b))
{
auto t = int64_t{};
tr_variantGetInt(b, &t);
time_checked = time_t(t);
}
else if (tr_variantIsList(b))
{
auto offset = int64_t{};
tr_variantGetInt(tr_variantListChild(b, 0), &offset);
time_checked = tr_time();
auto const [begin, end] = tor->piecesInFile(fi);
for (size_t i = 0, n = end - begin; i < n; ++i)
{
int64_t piece_time = 0;
tr_variantGetInt(tr_variantListChild(b, i + 1), &piece_time);
time_checked = std::min(time_checked, time_t(piece_time));
}
}
mtimes.push_back(time_checked);
}
}
if (std::size(mtimes) != n_files)
{
tr_logAddDebugTor(tor, fmt::format("Couldn't load mtimes: expected {} got {}", std::size(mtimes), n_files));
// if resizing grows the vector, we'll get 0 mtimes for the
// new items which is exactly what we want since the pieces
// in an unknown state should be treated as untested
mtimes.resize(n_files);
}
tor->initCheckedPieces(checked, std::data(mtimes));
/// COMPLETION
auto blocks = tr_bitfield{ tor->blockCount() };
char const* err = nullptr;
if (tr_variant const* const b = tr_variantDictFind(prog, TR_KEY_blocks); b != nullptr)
{
uint8_t const* buf = nullptr;
auto buflen = size_t{};
if (!tr_variantGetRaw(b, &buf, &buflen))
{
err = "Invalid value for \"blocks\"";
}
else
{
rawToBitfield(blocks, buf, buflen);
}
}
else if (auto sv = std::string_view{}; tr_variantDictFindStrView(prog, TR_KEY_have, &sv))
{
if (sv == "all"sv)
{
blocks.setHasAll();
}
else
{
err = "Invalid value for HAVE";
}
}
else if (tr_variantDictFindRaw(prog, TR_KEY_bitfield, &raw, &rawlen))
{
blocks.setRaw(raw, rawlen);
}
else
{
err = "Couldn't find 'pieces' or 'have' or 'bitfield'";
}
if (err != nullptr)
{
tr_logAddDebugTor(tor, fmt::format("Torrent needs to be verified - {}", err));
}
else
{
tor->setBlocks(blocks);
}
return tr_resume::Progress;
}
return tr_resume::fields_t{};
}
/***
****
***/
static auto loadFromFile(tr_torrent* tor, tr_resume::fields_t fieldsToLoad, bool* did_migrate_filename)
{
auto fields_loaded = tr_resume::fields_t{};
TR_ASSERT(tr_isTorrent(tor));
auto const wasDirty = tor->isDirty;
auto const migrated = tr_torrent_metainfo::migrateFile(
tor->session->resume_dir,
tor->name(),
tor->infoHashString(),
".resume"sv);
if (did_migrate_filename != nullptr)
{
*did_migrate_filename = migrated;
}
auto const filename = tor->resumeFile();
auto buf = std::vector<char>{};
tr_error* error = nullptr;
auto top = tr_variant{};
if (!tr_loadFile(buf, filename, &error) ||
!tr_variantFromBuf(
&top,
TR_VARIANT_PARSE_BENC | TR_VARIANT_PARSE_INPLACE,
{ std::data(buf), std::size(buf) },
nullptr,
&error))
{
tr_logAddDebugTor(tor, fmt::format("Couldn't read '{}': {}", filename, error->message));
tr_error_clear(&error);
return fields_loaded;
}
tr_logAddDebugTor(tor, fmt::format("Read resume file '{}'", filename));
auto boolVal = false;
auto i = int64_t{};
auto sv = std::string_view{};
if ((fieldsToLoad & tr_resume::Corrupt) != 0 && tr_variantDictFindInt(&top, TR_KEY_corrupt, &i))
{
tor->corruptPrev = i;
fields_loaded |= tr_resume::Corrupt;
}
if ((fieldsToLoad & (tr_resume::Progress | tr_resume::DownloadDir)) != 0 &&
tr_variantDictFindStrView(&top, TR_KEY_destination, &sv) && !std::empty(sv))
{
bool const is_current_dir = tor->current_dir == tor->download_dir;
tor->download_dir = sv;
if (is_current_dir)
{
tor->current_dir = sv;
}
fields_loaded |= tr_resume::DownloadDir;
}
if ((fieldsToLoad & (tr_resume::Progress | tr_resume::IncompleteDir)) != 0 &&
tr_variantDictFindStrView(&top, TR_KEY_incomplete_dir, &sv) && !std::empty(sv))
{
bool const is_current_dir = tor->current_dir == tor->incomplete_dir;
tor->incomplete_dir = sv;
if (is_current_dir)
{
tor->current_dir = sv;
}
fields_loaded |= tr_resume::IncompleteDir;
}
if ((fieldsToLoad & tr_resume::Downloaded) != 0 && tr_variantDictFindInt(&top, TR_KEY_downloaded, &i))
{
tor->downloadedPrev = i;
fields_loaded |= tr_resume::Downloaded;
}
if ((fieldsToLoad & tr_resume::Uploaded) != 0 && tr_variantDictFindInt(&top, TR_KEY_uploaded, &i))
{
tor->uploadedPrev = i;
fields_loaded |= tr_resume::Uploaded;
}
if ((fieldsToLoad & tr_resume::MaxPeers) != 0 && tr_variantDictFindInt(&top, TR_KEY_max_peers, &i))
{
tor->maxConnectedPeers = i;
fields_loaded |= tr_resume::MaxPeers;
}
if ((fieldsToLoad & tr_resume::Run) != 0 && tr_variantDictFindBool(&top, TR_KEY_paused, &boolVal))
{
tor->isRunning = !boolVal;
fields_loaded |= tr_resume::Run;
}
if ((fieldsToLoad & tr_resume::AddedDate) != 0 && tr_variantDictFindInt(&top, TR_KEY_added_date, &i))
{
tor->addedDate = i;
fields_loaded |= tr_resume::AddedDate;
}
if ((fieldsToLoad & tr_resume::DoneDate) != 0 && tr_variantDictFindInt(&top, TR_KEY_done_date, &i))
{
tor->doneDate = i;
fields_loaded |= tr_resume::DoneDate;
}
if ((fieldsToLoad & tr_resume::ActivityDate) != 0 && tr_variantDictFindInt(&top, TR_KEY_activity_date, &i))
{
tor->setDateActive(i);
fields_loaded |= tr_resume::ActivityDate;
}
if ((fieldsToLoad & tr_resume::TimeSeeding) != 0 && tr_variantDictFindInt(&top, TR_KEY_seeding_time_seconds, &i))
{
tor->secondsSeeding = i;
fields_loaded |= tr_resume::TimeSeeding;
}
if ((fieldsToLoad & tr_resume::TimeDownloading) != 0 && tr_variantDictFindInt(&top, TR_KEY_downloading_time_seconds, &i))
{
tor->secondsDownloading = i;
fields_loaded |= tr_resume::TimeDownloading;
}
if ((fieldsToLoad & tr_resume::BandwidthPriority) != 0 && tr_variantDictFindInt(&top, TR_KEY_bandwidth_priority, &i) &&
tr_isPriority(i))
{
tr_torrentSetPriority(tor, i);
fields_loaded |= tr_resume::BandwidthPriority;
}
if ((fieldsToLoad & tr_resume::Peers) != 0)
{
fields_loaded |= loadPeers(&top, tor);
}
if ((fieldsToLoad & tr_resume::Progress) != 0)
{
fields_loaded |= loadProgress(&top, tor);
}
// Only load file priorities if we are actually downloading.
// If we're a seed or partial seed, loading it is a waste of time.
// NB: this is why loadProgress() comes before loadFilePriorities()
if (!tor->isDone() && (fieldsToLoad & tr_resume::FilePriorities) != 0)
{
fields_loaded |= loadFilePriorities(&top, tor);
}
if ((fieldsToLoad & tr_resume::Dnd) != 0)
{
fields_loaded |= loadDND(&top, tor);
}
if ((fieldsToLoad & tr_resume::Speedlimit) != 0)
{
fields_loaded |= loadSpeedLimits(&top, tor);
}
if ((fieldsToLoad & tr_resume::Ratiolimit) != 0)
{
fields_loaded |= loadRatioLimits(&top, tor);
}
if ((fieldsToLoad & tr_resume::Idlelimit) != 0)
{
fields_loaded |= loadIdleLimits(&top, tor);
}
if ((fieldsToLoad & tr_resume::Filenames) != 0)
{
fields_loaded |= loadFilenames(&top, tor);
}
if ((fieldsToLoad & tr_resume::Name) != 0)
{
fields_loaded |= loadName(&top, tor);
}
if ((fieldsToLoad & tr_resume::Labels) != 0)
{
fields_loaded |= loadLabels(&top, tor);
}
/* loading the resume file triggers of a lot of changes,
* but none of them needs to trigger a re-saving of the
* same resume information... */
tor->isDirty = wasDirty;
tr_variantFree(&top);
return fields_loaded;
}
static auto setFromCtor(tr_torrent* tor, tr_resume::fields_t fields, tr_ctor const* ctor, tr_ctorMode mode)
{
auto ret = tr_resume::fields_t{};
if ((fields & tr_resume::Run) != 0)
{
auto isPaused = bool{};
if (tr_ctorGetPaused(ctor, mode, &isPaused))
{
tor->isRunning = !isPaused;
ret |= tr_resume::Run;
}
}
if (((fields & tr_resume::MaxPeers) != 0) && tr_ctorGetPeerLimit(ctor, mode, &tor->maxConnectedPeers))
{
ret |= tr_resume::MaxPeers;
}
if ((fields & tr_resume::DownloadDir) != 0)
{
char const* path = nullptr;
if (tr_ctorGetDownloadDir(ctor, mode, &path) && !tr_str_is_empty(path))
{
ret |= tr_resume::DownloadDir;
tor->download_dir = path;
}
}
return ret;
}
static auto useManditoryFields(tr_torrent* tor, tr_resume::fields_t fields, tr_ctor const* ctor)
{
return setFromCtor(tor, fields, ctor, TR_FORCE);
}
static auto useFallbackFields(tr_torrent* tor, tr_resume::fields_t fields, tr_ctor const* ctor)
{
return setFromCtor(tor, fields, ctor, TR_FALLBACK);
}
namespace tr_resume
{
fields_t load(tr_torrent* tor, fields_t fields_to_load, tr_ctor const* ctor, bool* did_rename_to_hash_only_name)
{
TR_ASSERT(tr_isTorrent(tor));
auto ret = fields_t{};
ret |= useManditoryFields(tor, fields_to_load, ctor);
fields_to_load &= ~ret;
ret |= loadFromFile(tor, fields_to_load, did_rename_to_hash_only_name);
fields_to_load &= ~ret;
ret |= useFallbackFields(tor, fields_to_load, ctor);
return ret;
}
void save(tr_torrent* tor)
{
if (!tr_isTorrent(tor))
{
return;
}
auto top = tr_variant{};
tr_variantInitDict(&top, 50); /* arbitrary "big enough" number */
tr_variantDictAddInt(&top, TR_KEY_seeding_time_seconds, tor->secondsSeeding);
tr_variantDictAddInt(&top, TR_KEY_downloading_time_seconds, tor->secondsDownloading);
tr_variantDictAddInt(&top, TR_KEY_activity_date, tor->activityDate);
tr_variantDictAddInt(&top, TR_KEY_added_date, tor->addedDate);
tr_variantDictAddInt(&top, TR_KEY_corrupt, tor->corruptPrev + tor->corruptCur);
tr_variantDictAddInt(&top, TR_KEY_done_date, tor->doneDate);
tr_variantDictAddQuark(&top, TR_KEY_destination, tor->downloadDir().quark());
if (!std::empty(tor->incompleteDir()))
{
tr_variantDictAddQuark(&top, TR_KEY_incomplete_dir, tor->incompleteDir().quark());
}
tr_variantDictAddInt(&top, TR_KEY_downloaded, tor->downloadedPrev + tor->downloadedCur);
tr_variantDictAddInt(&top, TR_KEY_uploaded, tor->uploadedPrev + tor->uploadedCur);
tr_variantDictAddInt(&top, TR_KEY_max_peers, tor->maxConnectedPeers);
tr_variantDictAddInt(&top, TR_KEY_bandwidth_priority, tr_torrentGetPriority(tor));
tr_variantDictAddBool(&top, TR_KEY_paused, !tor->isRunning && !tor->isQueued());
savePeers(&top, tor);
if (tor->hasMetadata())
{
saveFilePriorities(&top, tor);
saveDND(&top, tor);
saveProgress(&top, tor);
}
saveSpeedLimits(&top, tor);
saveRatioLimits(&top, tor);
saveIdleLimits(&top, tor);
saveFilenames(&top, tor);
saveName(&top, tor);
saveLabels(&top, tor);
if (auto const err = tr_variantToFile(&top, TR_VARIANT_FMT_BENC, tor->resumeFile()); err != 0)
{
tor->setLocalError(tr_strvJoin("Unable to save resume file: ", tr_strerror(err)));
}
tr_variantFree(&top);
}
} // namespace tr_resume
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