// This file Copyright © 2009-2022 Mnemosyne LLC. // It may be used under GPLv2 (SPDX: GPL-2.0), GPLv3 (SPDX: GPL-3.0), // or any future license endorsed by Mnemosyne LLC. // License text can be found in the licenses/ folder. #include /* EINVAL */ #include #include /* EINVAL */ #include /* INT_MAX */ #include #include /* signal() */ #include /* memcmp */ #include #include #include #include #include #include #include #include #ifndef _WIN32 #include /* wait() */ #include /* fork(), execvp(), _exit() */ #else #include /* CreateProcess(), GetLastError() */ #endif #include /* evutil_vsnprintf() */ #include "transmission.h" #include "announcer.h" #include "bandwidth.h" #include "cache.h" #include "completion.h" #include "crypto-utils.h" /* for tr_sha1 */ #include "error.h" #include "fdlimit.h" /* tr_fdTorrentClose */ #include "file.h" #include "inout.h" /* tr_ioTestPiece() */ #include "log.h" #include "magnet-metainfo.h" #include "peer-common.h" /* MAX_BLOCK_SIZE */ #include "peer-mgr.h" #include "platform.h" /* TR_PATH_DELIMITER_STR */ #include "resume.h" #include "session.h" #include "subprocess.h" #include "torrent-magnet.h" #include "torrent-metainfo.h" #include "torrent.h" #include "tr-assert.h" #include "trevent.h" /* tr_runInEventThread() */ #include "utils.h" #include "variant.h" #include "verify.h" #include "version.h" #include "web-utils.h" /*** **** ***/ #define tr_deeplog_tor(tor, ...) tr_logAddDeepNamed(tr_torrentName(tor), __VA_ARGS__) using namespace std::literals; /*** **** ***/ char const* tr_torrentName(tr_torrent const* tor) { return tor != nullptr ? tor->name().c_str() : ""; } uint64_t tr_torrentTotalSize(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->totalSize(); } int tr_torrentId(tr_torrent const* tor) { return tor != nullptr ? tor->uniqueId : -1; } tr_torrent* tr_torrentFindFromId(tr_session* session, int id) { auto& src = session->torrentsById; auto it = src.find(id); return it == std::end(src) ? nullptr : it->second; } tr_torrent* tr_torrentFindFromHash(tr_session* session, tr_sha1_digest_t const* hash) { return hash == nullptr ? nullptr : session->getTorrent(*hash); } tr_torrent* tr_torrentFindFromMetainfo(tr_session* session, tr_torrent_metainfo const* metainfo) { if (session == nullptr || metainfo == nullptr) { return nullptr; } return tr_torrentFindFromHash(session, &metainfo->infoHash()); } tr_torrent* tr_torrentFindFromMagnetLink(tr_session* session, char const* magnet_link) { auto mm = tr_magnet_metainfo{}; return mm.parseMagnet(magnet_link ? magnet_link : "") ? session->getTorrent(mm.infoHash()) : nullptr; } tr_torrent* tr_torrentFindFromObfuscatedHash(tr_session* session, tr_sha1_digest_t const& obfuscated_hash) { for (auto* tor : session->torrents) { if (tor->obfuscated_hash == obfuscated_hash) { return tor; } } return nullptr; } bool tr_torrent::isPieceTransferAllowed(tr_direction direction) const { TR_ASSERT(tr_isDirection(direction)); bool allowed = true; if (tr_torrentUsesSpeedLimit(this, direction) && this->speedLimitBps(direction) <= 0) { allowed = false; } if (tr_torrentUsesSessionLimits(this)) { unsigned int limit = 0; if (tr_sessionGetActiveSpeedLimit_Bps(this->session, direction, &limit) && (limit <= 0)) { allowed = false; } } return allowed; } /*** **** ***/ static void tr_torrentUnsetPeerId(tr_torrent* tor) { // triggers a rebuild next time tr_torrentGetPeerId() is called tor->peer_id.reset(); } static int peerIdTTL(tr_torrent const* tor) { auto const ctime = tor->peer_id_creation_time; return ctime == 0 ? 0 : (int)difftime(ctime + tor->session->peer_id_ttl_hours * 3600, tr_time()); } tr_peer_id_t const& tr_torrentGetPeerId(tr_torrent* tor) { bool const needs_new_peer_id = !tor->peer_id || // doesn't have one (tor->isPublic() && (peerIdTTL(tor) <= 0)); // has one but it's expired if (needs_new_peer_id) { tor->peer_id = tr_peerIdInit(); tor->peer_id_creation_time = tr_time(); } return *tor->peer_id; } /*** **** PER-TORRENT UL / DL SPEEDS ***/ void tr_torrent::setSpeedLimitBps(tr_direction dir, unsigned int Bps) { TR_ASSERT(tr_isDirection(dir)); if (this->bandwidth->setDesiredSpeedBytesPerSecond(dir, Bps)) { this->setDirty(); } } void tr_torrentSetSpeedLimit_KBps(tr_torrent* tor, tr_direction dir, unsigned int KBps) { tor->setSpeedLimitBps(dir, tr_toSpeedBytes(KBps)); } unsigned int tr_torrent::speedLimitBps(tr_direction dir) const { TR_ASSERT(tr_isDirection(dir)); return this->bandwidth->getDesiredSpeedBytesPerSecond(dir); } unsigned int tr_torrentGetSpeedLimit_KBps(tr_torrent const* tor, tr_direction dir) { TR_ASSERT(tr_isTorrent(tor)); TR_ASSERT(tr_isDirection(dir)); return tr_toSpeedKBps(tor->speedLimitBps(dir)); } void tr_torrentUseSpeedLimit(tr_torrent* tor, tr_direction dir, bool do_use) { TR_ASSERT(tr_isTorrent(tor)); TR_ASSERT(tr_isDirection(dir)); if (tor->bandwidth->setLimited(dir, do_use)) { tor->setDirty(); } } bool tr_torrentUsesSpeedLimit(tr_torrent const* tor, tr_direction dir) { TR_ASSERT(tr_isTorrent(tor)); return tor->bandwidth->isLimited(dir); } void tr_torrentUseSessionLimits(tr_torrent* tor, bool doUse) { TR_ASSERT(tr_isTorrent(tor)); if (tor->bandwidth->honorParentLimits(TR_UP, doUse) || tor->bandwidth->honorParentLimits(TR_DOWN, doUse)) { tor->setDirty(); } } bool tr_torrentUsesSessionLimits(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->bandwidth->areParentLimitsHonored(TR_UP); } /*** **** ***/ void tr_torrentSetRatioMode(tr_torrent* tor, tr_ratiolimit mode) { TR_ASSERT(tr_isTorrent(tor)); TR_ASSERT(mode == TR_RATIOLIMIT_GLOBAL || mode == TR_RATIOLIMIT_SINGLE || mode == TR_RATIOLIMIT_UNLIMITED); if (mode != tor->ratioLimitMode) { tor->ratioLimitMode = mode; tor->setDirty(); } } tr_ratiolimit tr_torrentGetRatioMode(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->ratioLimitMode; } void tr_torrentSetRatioLimit(tr_torrent* tor, double desiredRatio) { TR_ASSERT(tr_isTorrent(tor)); if ((int)(desiredRatio * 100.0) != (int)(tor->desiredRatio * 100.0)) { tor->desiredRatio = desiredRatio; tor->setDirty(); } } double tr_torrentGetRatioLimit(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->desiredRatio; } bool tr_torrentGetSeedRatio(tr_torrent const* tor, double* ratio) { auto isLimited = bool{}; TR_ASSERT(tr_isTorrent(tor)); switch (tr_torrentGetRatioMode(tor)) { case TR_RATIOLIMIT_SINGLE: isLimited = true; if (ratio != nullptr) { *ratio = tr_torrentGetRatioLimit(tor); } break; case TR_RATIOLIMIT_GLOBAL: isLimited = tr_sessionIsRatioLimited(tor->session); if (isLimited && ratio != nullptr) { *ratio = tr_sessionGetRatioLimit(tor->session); } break; default: /* TR_RATIOLIMIT_UNLIMITED */ isLimited = false; break; } return isLimited; } /* returns true if the seed ratio applies -- * it applies if the torrent's a seed AND it has a seed ratio set */ static bool tr_torrentGetSeedRatioBytes(tr_torrent const* tor, uint64_t* setme_left, uint64_t* setme_goal) { bool seed_ratio_applies = false; TR_ASSERT(tr_isTorrent(tor)); auto seed_ratio = double{}; if (tr_torrentGetSeedRatio(tor, &seed_ratio)) { auto const uploaded = tor->uploadedCur + tor->uploadedPrev; auto const baseline = tor->totalSize(); auto const goal = baseline * seed_ratio; if (setme_left != nullptr) { *setme_left = goal > uploaded ? goal - uploaded : 0; } if (setme_goal != nullptr) { *setme_goal = goal; } seed_ratio_applies = tor->isDone(); } return seed_ratio_applies; } static bool tr_torrentIsSeedRatioDone(tr_torrent const* tor) { auto bytesLeft = uint64_t{}; return tr_torrentGetSeedRatioBytes(tor, &bytesLeft, nullptr) && bytesLeft == 0; } /*** **** ***/ void tr_torrentSetIdleMode(tr_torrent* tor, tr_idlelimit mode) { TR_ASSERT(tr_isTorrent(tor)); TR_ASSERT(mode == TR_IDLELIMIT_GLOBAL || mode == TR_IDLELIMIT_SINGLE || mode == TR_IDLELIMIT_UNLIMITED); if (mode != tor->idleLimitMode) { tor->idleLimitMode = mode; tor->setDirty(); } } tr_idlelimit tr_torrentGetIdleMode(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->idleLimitMode; } void tr_torrentSetIdleLimit(tr_torrent* tor, uint16_t idleMinutes) { TR_ASSERT(tr_isTorrent(tor)); if (idleMinutes > 0) { tor->idleLimitMinutes = idleMinutes; tor->setDirty(); } } uint16_t tr_torrentGetIdleLimit(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->idleLimitMinutes; } bool tr_torrentGetSeedIdle(tr_torrent const* tor, uint16_t* idleMinutes) { auto isLimited = bool{}; switch (tr_torrentGetIdleMode(tor)) { case TR_IDLELIMIT_SINGLE: isLimited = true; if (idleMinutes != nullptr) { *idleMinutes = tr_torrentGetIdleLimit(tor); } break; case TR_IDLELIMIT_GLOBAL: isLimited = tr_sessionIsIdleLimited(tor->session); if (isLimited && idleMinutes != nullptr) { *idleMinutes = tr_sessionGetIdleLimit(tor->session); } break; default: /* TR_IDLELIMIT_UNLIMITED */ isLimited = false; break; } return isLimited; } static bool tr_torrentIsSeedIdleLimitDone(tr_torrent const* tor) { auto idleMinutes = uint16_t{}; return tr_torrentGetSeedIdle(tor, &idleMinutes) && difftime(tr_time(), std::max(tor->startDate, tor->activityDate)) >= idleMinutes * 60U; } /*** **** ***/ void tr_torrentCheckSeedLimit(tr_torrent* tor) { TR_ASSERT(tr_isTorrent(tor)); if (!tor->isRunning || tor->isStopping || !tor->isDone()) { return; } /* if we're seeding and reach our seed ratio limit, stop the torrent */ if (tr_torrentIsSeedRatioDone(tor)) { tr_logAddTorInfo(tor, "%s", "Seed ratio reached; pausing torrent"); tor->isStopping = true; /* maybe notify the client */ if (tor->ratio_limit_hit_func != nullptr) { (*tor->ratio_limit_hit_func)(tor, tor->ratio_limit_hit_func_user_data); } } /* if we're seeding and reach our inactiviy limit, stop the torrent */ else if (tr_torrentIsSeedIdleLimitDone(tor)) { tr_logAddTorInfo(tor, "%s", "Seeding idle limit reached; pausing torrent"); tor->isStopping = true; tor->finishedSeedingByIdle = true; /* maybe notify the client */ if (tor->idle_limit_hit_func != nullptr) { (*tor->idle_limit_hit_func)(tor, tor->idle_limit_hit_func_user_data); } } } /*** **** ***/ static void tr_torrentClearError(tr_torrent* tor) { tor->error = TR_STAT_OK; tor->error_announce_url.clear(); tor->error_string.clear(); } static void onTrackerResponse(tr_torrent* tor, tr_tracker_event const* event, void* /*user_data*/) { switch (event->messageType) { case TR_TRACKER_PEERS: tr_logAddTorDbg(tor, "Got %zu peers from tracker", event->pexCount); tr_peerMgrAddPex(tor, TR_PEER_FROM_TRACKER, event->pex, event->pexCount); break; case TR_TRACKER_COUNTS: if (tor->isPrivate() && (event->leechers == 0)) { tr_peerMgrSetSwarmIsAllSeeds(tor); } break; case TR_TRACKER_WARNING: tr_logAddTorErr(tor, _("Tracker warning: \"%" TR_PRIsv "\""), TR_PRIsv_ARG(event->text)); tor->error = TR_STAT_TRACKER_WARNING; tor->error_announce_url = event->announce_url; tor->error_string = event->text; break; case TR_TRACKER_ERROR: tor->error = TR_STAT_TRACKER_ERROR; tor->error_announce_url = event->announce_url; tor->error_string = event->text; break; case TR_TRACKER_ERROR_CLEAR: if (tor->error != TR_STAT_LOCAL_ERROR) { tr_torrentClearError(tor); } break; } } /*** **** **** TORRENT INSTANTIATION **** ***/ static void torrentStart(tr_torrent* tor, bool bypass_queue); static void tr_torrentFireMetadataCompleted(tr_torrent* tor); static void torrentInitFromInfoDict(tr_torrent* tor) { tor->completion = tr_completion{ tor, &tor->blockInfo() }; if (auto const obfuscated = tr_sha1("req2"sv, tor->infoHash()); obfuscated) { tor->obfuscated_hash = *obfuscated; } else { // lookups by obfuscated hash will fail for this torrent tr_logAddTorErr(tor, "error computing obfuscated info hash"); tor->obfuscated_hash = tr_sha1_digest_t{}; } tor->fpm_.reset(tor->metainfo_); tor->file_mtimes_.resize(tor->fileCount()); tor->file_priorities_.reset(&tor->fpm_); tor->files_wanted_.reset(&tor->fpm_); tor->checked_pieces_ = tr_bitfield{ size_t(tor->pieceCount()) }; } void tr_torrent::setMetainfo(tr_torrent_metainfo const& tm) { metainfo_ = tm; torrentInitFromInfoDict(this); tr_peerMgrOnTorrentGotMetainfo(this); tr_torrentFireMetadataCompleted(this); this->setDirty(); } static bool hasAnyLocalData(tr_torrent const* tor) { auto filename = std::string{}; for (tr_file_index_t i = 0, n = tor->fileCount(); i < n; ++i) { if (tor->findFile(filename, i)) { return true; } } return false; } static bool setLocalErrorIfFilesDisappeared(tr_torrent* tor) { bool const disappeared = tor->hasTotal() > 0 && !hasAnyLocalData(tor); if (disappeared) { tr_deeplog_tor(tor, "%s", "[LAZY] uh oh, the files disappeared"); tor->setLocalError(_( "No data found! Ensure your drives are connected or use \"Set Location\". To re-download, remove the torrent and re-add it.")); } return disappeared; } static void torrentCallScript(tr_torrent const* tor, char const* script); static void callScriptIfEnabled(tr_torrent const* tor, TrScript type) { auto const* session = tor->session; if (tr_sessionIsScriptEnabled(session, type)) { torrentCallScript(tor, tr_sessionGetScript(session, type)); } } static void refreshCurrentDir(tr_torrent* tor); static void torrentInit(tr_torrent* tor, tr_ctor const* ctor) { static auto next_unique_id = int{ 1 }; auto const lock = tor->unique_lock(); tr_session* session = tr_ctorGetSession(ctor); TR_ASSERT(session != nullptr); tor->session = session; tor->uniqueId = next_unique_id++; tor->queuePosition = tr_sessionCountTorrents(session); torrentInitFromInfoDict(tor); char const* dir = nullptr; if (tr_ctorGetDownloadDir(ctor, TR_FORCE, &dir) || tr_ctorGetDownloadDir(ctor, TR_FALLBACK, &dir)) { tor->download_dir = dir; } if (!tr_ctorGetIncompleteDir(ctor, &dir)) { dir = tr_sessionGetIncompleteDir(session); } if (tr_sessionIsIncompleteDirEnabled(session)) { tor->incomplete_dir = dir; } tor->bandwidth = new Bandwidth(session->bandwidth); tor->bandwidth->setPriority(tr_ctorGetBandwidthPriority(ctor)); tor->error = TR_STAT_OK; tor->finishedSeedingByIdle = false; tr_peerMgrAddTorrent(session->peerMgr, tor); TR_ASSERT(tor->downloadedCur == 0); TR_ASSERT(tor->uploadedCur == 0); auto const now = tr_time(); tor->addedDate = now; // this is a default that will be overwritten by the resume file tor->anyDate = now; // tr_torrentLoadResume() calls a lot of tr_torrentSetFoo() methods // that set things as dirty, but... these settings being loaded are // the same ones that would be saved back again, so don't let them // affect the 'is dirty' flag. auto const was_dirty = tor->isDirty; bool resume_file_was_migrated = false; auto const loaded = tr_torrentLoadResume(tor, ~(uint64_t)0, ctor, &resume_file_was_migrated); tor->isDirty = was_dirty; if (resume_file_was_migrated) { tor->metainfo_.migrateFile(session->torrent_dir, tor->name(), tor->infoHashString(), ".torrent"); } tor->completeness = tor->completion.status(); tr_ctorInitTorrentPriorities(ctor, tor); tr_ctorInitTorrentWanted(ctor, tor); refreshCurrentDir(tor); bool const doStart = tor->isRunning; tor->isRunning = false; if ((loaded & TR_FR_SPEEDLIMIT) == 0) { tr_torrentUseSpeedLimit(tor, TR_UP, false); tor->setSpeedLimitBps(TR_UP, tr_sessionGetSpeedLimit_Bps(tor->session, TR_UP)); tr_torrentUseSpeedLimit(tor, TR_DOWN, false); tor->setSpeedLimitBps(TR_DOWN, tr_sessionGetSpeedLimit_Bps(tor->session, TR_DOWN)); tr_torrentUseSessionLimits(tor, true); } if ((loaded & TR_FR_RATIOLIMIT) == 0) { tr_torrentSetRatioMode(tor, TR_RATIOLIMIT_GLOBAL); tr_torrentSetRatioLimit(tor, tr_sessionGetRatioLimit(tor->session)); } if ((loaded & TR_FR_IDLELIMIT) == 0) { tr_torrentSetIdleMode(tor, TR_IDLELIMIT_GLOBAL); tr_torrentSetIdleLimit(tor, tr_sessionGetIdleLimit(tor->session)); } tr_sessionAddTorrent(session, tor); // if we don't have a local .torrent file already, assume the torrent is new auto const filename = tor->torrentFile(); bool const is_new_torrent = !tr_sys_path_exists(filename.c_str(), nullptr); if (is_new_torrent) { tr_error* error = nullptr; if (!tr_ctorSaveContents(ctor, filename, &error)) { tor->setLocalError( tr_strvJoin("Unable to save torrent file: ", error->message, " ("sv, std::to_string(error->code), ")"sv)); } tr_error_clear(&error); } tor->announcer_tiers = tr_announcerAddTorrent(tor, onTrackerResponse, nullptr); if (is_new_torrent) { if (tor->hasMetadata()) { callScriptIfEnabled(tor, TR_SCRIPT_ON_TORRENT_ADDED); } if (!tor->hasMetadata() && !doStart) { tor->prefetchMagnetMetadata = true; tr_torrentStartNow(tor); } else { tor->startAfterVerify = doStart; tr_torrentVerify(tor, nullptr, nullptr); } } else if (doStart) { tr_torrentStart(tor); } else { setLocalErrorIfFilesDisappeared(tor); } } tr_torrent* tr_torrentNew(tr_ctor* ctor, tr_torrent** setme_duplicate_of) { TR_ASSERT(ctor != nullptr); auto* const session = tr_ctorGetSession(ctor); TR_ASSERT(tr_isSession(session)); // is the metainfo valid? auto metainfo = tr_ctorStealMetainfo(ctor); if (std::empty(metainfo.infoHashString())) { return nullptr; } // is it a duplicate? if (auto* const duplicate_of = session->getTorrent(metainfo.infoHash()); duplicate_of != nullptr) { if (setme_duplicate_of != nullptr) { *setme_duplicate_of = duplicate_of; } return nullptr; } auto* const tor = new tr_torrent{ std::move(metainfo) }; torrentInit(tor, ctor); return tor; } /** *** **/ void tr_torrentSetDownloadDir(tr_torrent* tor, char const* path) { TR_ASSERT(tr_isTorrent(tor)); if (tor->download_dir != path) { tor->download_dir = path; tor->markEdited(); tor->setDirty(); } refreshCurrentDir(tor); } char const* tr_torrentGetDownloadDir(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->downloadDir().c_str(); } char const* tr_torrentGetCurrentDir(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->currentDir().c_str(); } void tr_torrentChangeMyPort(tr_torrent* tor) { TR_ASSERT(tr_isTorrent(tor)); if (tor->isRunning) { tr_announcerChangeMyPort(tor); } } static inline void tr_torrentManualUpdateImpl(void* vtor) { auto* tor = static_cast(vtor); TR_ASSERT(tr_isTorrent(tor)); if (tor->isRunning) { tr_announcerManualAnnounce(tor); } } void tr_torrentManualUpdate(tr_torrent* tor) { TR_ASSERT(tr_isTorrent(tor)); tr_runInEventThread(tor->session, tr_torrentManualUpdateImpl, tor); } bool tr_torrentCanManualUpdate(tr_torrent const* tor) { return tr_isTorrent(tor) && tor->isRunning && tr_announcerCanManualAnnounce(tor); } tr_stat const* tr_torrentStatCached(tr_torrent* tor) { time_t const now = tr_time(); return (tr_isTorrent(tor) && now == tor->lastStatTime) ? &tor->stats : tr_torrentStat(tor); } void tr_torrent::setVerifyState(tr_verify_state state) { TR_ASSERT(state == TR_VERIFY_NONE || state == TR_VERIFY_WAIT || state == TR_VERIFY_NOW); this->verifyState = state; this->markChanged(); } tr_torrent_activity tr_torrentGetActivity(tr_torrent const* tor) { tr_torrent_activity ret = TR_STATUS_STOPPED; bool const is_seed = tor->isDone(); if (tor->verifyState == TR_VERIFY_NOW) { ret = TR_STATUS_CHECK; } else if (tor->verifyState == TR_VERIFY_WAIT) { ret = TR_STATUS_CHECK_WAIT; } else if (tor->isRunning) { ret = is_seed ? TR_STATUS_SEED : TR_STATUS_DOWNLOAD; } else if (tor->isQueued()) { if (is_seed && tr_sessionGetQueueEnabled(tor->session, TR_UP)) { ret = TR_STATUS_SEED_WAIT; } else if (!is_seed && tr_sessionGetQueueEnabled(tor->session, TR_DOWN)) { ret = TR_STATUS_DOWNLOAD_WAIT; } } return ret; } static int torrentGetIdleSecs(tr_torrent const* tor, tr_torrent_activity activity) { return ((activity == TR_STATUS_DOWNLOAD || activity == TR_STATUS_SEED) && tor->startDate != 0) ? (int)difftime(tr_time(), std::max(tor->startDate, tor->activityDate)) : -1; } static inline bool tr_torrentIsStalled(tr_torrent const* tor, int idle_secs) { return tr_sessionGetQueueStalledEnabled(tor->session) && idle_secs > tr_sessionGetQueueStalledMinutes(tor->session) * 60; } static double getVerifyProgress(tr_torrent const* tor) { return tor->verify_progress ? *tor->verify_progress : 0.0; } tr_stat const* tr_torrentStat(tr_torrent* tor) { TR_ASSERT(tr_isTorrent(tor)); uint64_t const now = tr_time_msec(); auto swarm_stats = tr_swarm_stats{}; tor->lastStatTime = tr_time(); if (tor->swarm != nullptr) { tr_swarmGetStats(tor->swarm, &swarm_stats); } tr_stat* const s = &tor->stats; s->id = tor->uniqueId; s->activity = tr_torrentGetActivity(tor); s->error = tor->error; s->queuePosition = tor->queuePosition; s->idleSecs = torrentGetIdleSecs(tor, s->activity); s->isStalled = tr_torrentIsStalled(tor, s->idleSecs); s->errorString = tor->error_string.c_str(); s->manualAnnounceTime = tr_announcerNextManualAnnounce(tor); s->peersConnected = swarm_stats.peerCount; s->peersSendingToUs = swarm_stats.activePeerCount[TR_DOWN]; s->peersGettingFromUs = swarm_stats.activePeerCount[TR_UP]; s->webseedsSendingToUs = swarm_stats.activeWebseedCount; for (int i = 0; i < TR_PEER_FROM__MAX; i++) { s->peersFrom[i] = swarm_stats.peerFromCount[i]; } s->rawUploadSpeed_KBps = tr_toSpeedKBps(tor->bandwidth->getRawSpeedBytesPerSecond(now, TR_UP)); s->rawDownloadSpeed_KBps = tr_toSpeedKBps(tor->bandwidth->getRawSpeedBytesPerSecond(now, TR_DOWN)); auto const pieceUploadSpeed_Bps = tor->bandwidth->getPieceSpeedBytesPerSecond(now, TR_UP); s->pieceUploadSpeed_KBps = tr_toSpeedKBps(pieceUploadSpeed_Bps); auto const pieceDownloadSpeed_Bps = tor->bandwidth->getPieceSpeedBytesPerSecond(now, TR_DOWN); s->pieceDownloadSpeed_KBps = tr_toSpeedKBps(pieceDownloadSpeed_Bps); s->percentComplete = tor->completion.percentComplete(); s->metadataPercentComplete = tr_torrentGetMetadataPercent(tor); s->percentDone = tor->completion.percentDone(); s->leftUntilDone = tor->completion.leftUntilDone(); s->sizeWhenDone = tor->completion.sizeWhenDone(); s->recheckProgress = s->activity == TR_STATUS_CHECK ? getVerifyProgress(tor) : 0; s->activityDate = tor->activityDate; s->addedDate = tor->addedDate; s->doneDate = tor->doneDate; s->editDate = tor->editDate; s->startDate = tor->startDate; s->secondsSeeding = tor->secondsSeeding; s->secondsDownloading = tor->secondsDownloading; s->corruptEver = tor->corruptCur + tor->corruptPrev; s->downloadedEver = tor->downloadedCur + tor->downloadedPrev; s->uploadedEver = tor->uploadedCur + tor->uploadedPrev; s->haveValid = tor->completion.hasValid(); s->haveUnchecked = tor->hasTotal() - s->haveValid; s->desiredAvailable = tr_peerMgrGetDesiredAvailable(tor); s->ratio = tr_getRatio(s->uploadedEver, tor->totalSize()); auto seedRatioBytesLeft = uint64_t{}; auto seedRatioBytesGoal = uint64_t{}; bool const seedRatioApplies = tr_torrentGetSeedRatioBytes(tor, &seedRatioBytesLeft, &seedRatioBytesGoal); switch (s->activity) { /* etaXLSpeed exists because if we use the piece speed directly, * brief fluctuations cause the ETA to jump all over the place. * so, etaXLSpeed is a smoothed-out version of the piece speed * to dampen the effect of fluctuations */ case TR_STATUS_DOWNLOAD: if (tor->etaDLSpeedCalculatedAt + 800 < now) { tor->etaDLSpeed_Bps = tor->etaDLSpeedCalculatedAt + 4000 < now ? pieceDownloadSpeed_Bps : /* if no recent previous speed, no need to smooth */ (tor->etaDLSpeed_Bps * 4.0 + pieceDownloadSpeed_Bps) / 5.0; /* smooth across 5 readings */ tor->etaDLSpeedCalculatedAt = now; } if (s->leftUntilDone > s->desiredAvailable && tor->webseedCount() < 1) { s->eta = TR_ETA_NOT_AVAIL; } else if (tor->etaDLSpeed_Bps == 0) { s->eta = TR_ETA_UNKNOWN; } else { s->eta = s->leftUntilDone / tor->etaDLSpeed_Bps; } s->etaIdle = TR_ETA_NOT_AVAIL; break; case TR_STATUS_SEED: if (!seedRatioApplies) { s->eta = TR_ETA_NOT_AVAIL; } else { if (tor->etaULSpeedCalculatedAt + 800 < now) { tor->etaULSpeed_Bps = tor->etaULSpeedCalculatedAt + 4000 < now ? pieceUploadSpeed_Bps : /* if no recent previous speed, no need to smooth */ (tor->etaULSpeed_Bps * 4.0 + pieceUploadSpeed_Bps) / 5.0; /* smooth across 5 readings */ tor->etaULSpeedCalculatedAt = now; } if (tor->etaULSpeed_Bps == 0) { s->eta = TR_ETA_UNKNOWN; } else { s->eta = seedRatioBytesLeft / tor->etaULSpeed_Bps; } } { auto seedIdleMinutes = uint16_t{}; s->etaIdle = tor->etaULSpeed_Bps < 1 && tr_torrentGetSeedIdle(tor, &seedIdleMinutes) ? seedIdleMinutes * 60 - s->idleSecs : TR_ETA_NOT_AVAIL; } break; default: s->eta = TR_ETA_NOT_AVAIL; s->etaIdle = TR_ETA_NOT_AVAIL; break; } /* s->haveValid is here to make sure a torrent isn't marked 'finished' * when the user hits "uncheck all" prior to starting the torrent... */ s->finished = tor->finishedSeedingByIdle || (seedRatioApplies && seedRatioBytesLeft == 0 && s->haveValid != 0); if (!seedRatioApplies || s->finished) { s->seedRatioPercentDone = 1.0F; } else if (seedRatioBytesGoal == 0) /* impossible? safeguard for div by zero */ { s->seedRatioPercentDone = 0.0F; } else { s->seedRatioPercentDone = float(seedRatioBytesGoal - seedRatioBytesLeft) / seedRatioBytesGoal; } /* test some of the constraints */ TR_ASSERT(s->sizeWhenDone <= tor->totalSize()); TR_ASSERT(s->leftUntilDone <= s->sizeWhenDone); TR_ASSERT(s->desiredAvailable <= s->leftUntilDone); return s; } /*** **** ***/ tr_file_view tr_torrentFile(tr_torrent const* tor, tr_file_index_t i) { TR_ASSERT(tr_isTorrent(tor)); auto const& subpath = tor->fileSubpath(i); auto const priority = tor->file_priorities_.filePriority(i); auto const wanted = tor->files_wanted_.fileWanted(i); auto const length = tor->fileSize(i); if (tor->completeness == TR_SEED || length == 0) { return { subpath.c_str(), length, length, 1.0, priority, wanted }; } auto const have = tor->completion.countHasBytesInSpan(tor->fpm_.byteSpan(i)); return { subpath.c_str(), have, length, have >= length ? 1.0 : have / double(length), priority, wanted }; } size_t tr_torrentFileCount(tr_torrent const* torrent) { TR_ASSERT(tr_isTorrent(torrent)); return torrent->fileCount(); } tr_webseed_view tr_torrentWebseed(tr_torrent const* tor, size_t i) { return tr_peerMgrWebseed(tor, i); } size_t tr_torrentWebseedCount(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->webseedCount(); } tr_tracker_view tr_torrentTracker(tr_torrent const* tor, size_t i) { return tr_announcerTracker(tor, i); } size_t tr_torrentTrackerCount(tr_torrent const* tor) { return tr_announcerTrackerCount(tor); } tr_torrent_view tr_torrentView(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); auto ret = tr_torrent_view{}; ret.name = tr_torrentName(tor); ret.hash_string = tor->infoHashString().c_str(); ret.comment = tor->comment().c_str(); ret.creator = tor->creator().c_str(); ret.source = tor->source().c_str(); ret.total_size = tor->totalSize(); ret.date_created = tor->dateCreated(); ret.piece_size = tor->pieceSize(); ret.n_pieces = tor->pieceCount(); ret.is_private = tor->isPrivate(); ret.is_folder = tor->fileCount() > 1; return ret; } char* tr_torrentFilename(tr_torrent const* tor) { return tr_strvDup(tor->torrentFile()); } /*** **** ***/ tr_peer_stat* tr_torrentPeers(tr_torrent const* tor, int* peerCount) { TR_ASSERT(tr_isTorrent(tor)); return tr_peerMgrPeerStats(tor, peerCount); } void tr_torrentPeersFree(tr_peer_stat* peers, int /*peerCount*/) { tr_free(peers); } void tr_torrentAvailability(tr_torrent const* tor, int8_t* tab, int size) { TR_ASSERT(tr_isTorrent(tor)); if (tab != nullptr && size > 0) { tr_peerMgrTorrentAvailability(tor, tab, size); } } void tr_torrentAmountFinished(tr_torrent const* tor, float* tabs, int n_tabs) { return tor->amountDoneBins(tabs, n_tabs); } static void tr_torrentResetTransferStats(tr_torrent* tor) { auto const lock = tor->unique_lock(); tor->downloadedPrev += tor->downloadedCur; tor->downloadedCur = 0; tor->uploadedPrev += tor->uploadedCur; tor->uploadedCur = 0; tor->corruptPrev += tor->corruptCur; tor->corruptCur = 0; tor->setDirty(); } /*** **** ***/ #ifdef TR_ENABLE_ASSERTS static bool queueIsSequenced(tr_session*); #endif static void freeTorrent(tr_torrent* tor) { auto const lock = tor->unique_lock(); TR_ASSERT(!tor->isRunning); tr_session* session = tor->session; tr_peerMgrRemoveTorrent(tor); tr_announcerRemoveTorrent(session->announcer, tor); tr_sessionRemoveTorrent(session, tor); if (!session->isClosing()) { // "so you die, captain, and we all move up in rank." // resequence the queue positions for (auto* t : session->torrents) { if (t->queuePosition > tor->queuePosition) { t->queuePosition--; t->markChanged(); } } TR_ASSERT(queueIsSequenced(session)); } delete tor->bandwidth; delete tor; } /** *** Start/Stop Callback **/ static void torrentSetQueued(tr_torrent* tor, bool queued); static void torrentStartImpl(void* vtor) { auto* tor = static_cast(vtor); auto const lock = tor->unique_lock(); TR_ASSERT(tr_isTorrent(tor)); tor->recheckCompleteness(); torrentSetQueued(tor, false); time_t const now = tr_time(); tor->isRunning = true; tor->completeness = tor->completion.status(); tor->startDate = now; tor->markChanged(); tr_torrentClearError(tor); tor->finishedSeedingByIdle = false; tr_torrentResetTransferStats(tor); tr_announcerTorrentStarted(tor); tor->dhtAnnounceAt = now + tr_rand_int_weak(20); tor->dhtAnnounce6At = now + tr_rand_int_weak(20); tor->lpdAnnounceAt = now; tr_peerMgrStartTorrent(tor); } static bool torrentShouldQueue(tr_torrent const* tor) { tr_direction const dir = tor->queueDirection(); return tr_sessionCountQueueFreeSlots(tor->session, dir) == 0; } static void torrentStart(tr_torrent* tor, bool bypass_queue) { switch (tr_torrentGetActivity(tor)) { case TR_STATUS_SEED: case TR_STATUS_DOWNLOAD: return; /* already started */ case TR_STATUS_SEED_WAIT: case TR_STATUS_DOWNLOAD_WAIT: if (!bypass_queue) { return; /* already queued */ } break; case TR_STATUS_CHECK: case TR_STATUS_CHECK_WAIT: /* verifying right now... wait until that's done so * we'll know what completeness to use/announce */ tor->startAfterVerify = true; return; case TR_STATUS_STOPPED: if (!bypass_queue && torrentShouldQueue(tor)) { torrentSetQueued(tor, true); return; } break; } /* don't allow the torrent to be started if the files disappeared */ if (setLocalErrorIfFilesDisappeared(tor)) { return; } /* otherwise, start it now... */ auto const lock = tor->unique_lock(); /* allow finished torrents to be resumed */ if (tr_torrentIsSeedRatioDone(tor)) { tr_logAddTorInfo(tor, "%s", _("Restarted manually -- disabling its seed ratio")); tr_torrentSetRatioMode(tor, TR_RATIOLIMIT_UNLIMITED); } /* corresponds to the peer_id sent as a tracker request parameter. * one tracker admin says: "When the same torrent is opened and * closed and opened again without quitting Transmission ... * change the peerid. It would help sometimes if a stopped event * was missed to ensure that we didn't think someone was cheating. */ tr_torrentUnsetPeerId(tor); tor->isRunning = true; tor->setDirty(); tr_runInEventThread(tor->session, torrentStartImpl, tor); } void tr_torrentStart(tr_torrent* tor) { if (tr_isTorrent(tor)) { torrentStart(tor, false); } } void tr_torrentStartNow(tr_torrent* tor) { if (tr_isTorrent(tor)) { torrentStart(tor, true); } } struct verify_data { bool aborted; tr_torrent* tor; tr_verify_done_func callback_func; void* callback_data; }; static void onVerifyDoneThreadFunc(void* vdata) { auto* data = static_cast(vdata); if (auto* const tor = data->tor; !tor->isDeleting) { if (!data->aborted) { tor->recheckCompleteness(); } if (data->callback_func != nullptr) { (*data->callback_func)(tor, data->aborted, data->callback_data); } if (!data->aborted && tor->startAfterVerify) { tor->startAfterVerify = false; torrentStart(tor, false); } } tr_free(data); } static void onVerifyDone(tr_torrent* tor, bool aborted, void* vdata) { auto* data = static_cast(vdata); TR_ASSERT(data->tor == tor); if (tor->isDeleting) { tr_free(data); return; } data->aborted = aborted; tr_runInEventThread(tor->session, onVerifyDoneThreadFunc, data); } static void verifyTorrent(void* vdata) { auto* data = static_cast(vdata); tr_torrent* tor = data->tor; auto const lock = tor->unique_lock(); if (tor->isDeleting) { tr_free(data); } else { /* if the torrent's already being verified, stop it */ tr_verifyRemove(tor); bool const startAfter = (tor->isRunning || tor->startAfterVerify) && !tor->isStopping; if (tor->isRunning) { tr_torrentStop(tor); } tor->startAfterVerify = startAfter; if (setLocalErrorIfFilesDisappeared(tor)) { tor->startAfterVerify = false; } else { tr_verifyAdd(tor, onVerifyDone, data); } } } void tr_torrentVerify(tr_torrent* tor, tr_verify_done_func callback_func, void* callback_data) { auto* const data = tr_new(struct verify_data, 1); data->tor = tor; data->aborted = false; data->callback_func = callback_func; data->callback_data = callback_data; tr_runInEventThread(tor->session, verifyTorrent, data); } void tr_torrentSave(tr_torrent* tor) { TR_ASSERT(tr_isTorrent(tor)); if (tor->isDirty) { tor->isDirty = false; tr_torrentSaveResume(tor); } } static void stopTorrent(void* vtor) { auto* tor = static_cast(vtor); TR_ASSERT(tr_isTorrent(tor)); auto const lock = tor->unique_lock(); tr_logAddTorInfo(tor, "%s", "Pausing"); tr_verifyRemove(tor); tr_peerMgrStopTorrent(tor); tr_announcerTorrentStopped(tor); tr_cacheFlushTorrent(tor->session->cache, tor); tr_fdTorrentClose(tor->session, tor->uniqueId); if (!tor->isDeleting) { tr_torrentSave(tor); } torrentSetQueued(tor, false); if (tor->magnetVerify) { tor->magnetVerify = false; tr_logAddTorInfo(tor, "%s", "Magnet Verify"); refreshCurrentDir(tor); tr_torrentVerify(tor, nullptr, nullptr); callScriptIfEnabled(tor, TR_SCRIPT_ON_TORRENT_ADDED); } } void tr_torrentStop(tr_torrent* tor) { TR_ASSERT(tr_isTorrent(tor)); if (tr_isTorrent(tor)) { auto const lock = tor->unique_lock(); tor->isRunning = false; tor->isStopping = false; tor->prefetchMagnetMetadata = false; tor->setDirty(); tr_runInEventThread(tor->session, stopTorrent, tor); } } static void closeTorrent(void* vtor) { auto* tor = static_cast(vtor); TR_ASSERT(tr_isTorrent(tor)); tor->session->removed_torrents.emplace_back(tor->uniqueId, tr_time()); tr_logAddTorInfo(tor, "%s", _("Removing torrent")); tor->magnetVerify = false; stopTorrent(tor); if (tor->isDeleting) { tor->metainfo_.removeFile(tor->session->torrent_dir, tor->name(), tor->infoHashString(), ".torrent"sv); tor->metainfo_.removeFile(tor->session->resume_dir, tor->name(), tor->infoHashString(), ".resume"sv); } tor->isRunning = false; freeTorrent(tor); } void tr_torrentFree(tr_torrent* tor) { if (tr_isTorrent(tor)) { tr_session* session = tor->session; TR_ASSERT(tr_isSession(session)); auto const lock = tor->unique_lock(); tr_torrentClearCompletenessCallback(tor); tr_runInEventThread(session, closeTorrent, tor); } } struct remove_data { tr_torrent* tor; bool deleteFlag; tr_fileFunc deleteFunc; }; static void tr_torrentDeleteLocalData(tr_torrent*, tr_fileFunc); static void removeTorrent(void* vdata) { auto* const data = static_cast(vdata); auto const lock = data->tor->unique_lock(); if (data->deleteFlag) { tr_torrentDeleteLocalData(data->tor, data->deleteFunc); } tr_torrentClearCompletenessCallback(data->tor); closeTorrent(data->tor); tr_free(data); } void tr_torrentRemove(tr_torrent* tor, bool deleteFlag, tr_fileFunc deleteFunc) { TR_ASSERT(tr_isTorrent(tor)); tor->isDeleting = true; auto* const data = tr_new0(struct remove_data, 1); data->tor = tor; data->deleteFlag = deleteFlag; data->deleteFunc = deleteFunc; tr_runInEventThread(tor->session, removeTorrent, data); } /** *** Completeness **/ static char const* getCompletionString(int type) { switch (type) { case TR_PARTIAL_SEED: /* Translators: this is a minor point that's safe to skip over, but FYI: "Complete" and "Done" are specific, different terms in Transmission: "Complete" means we've downloaded every file in the torrent. "Done" means we're done downloading the files we wanted, but NOT all that exist */ return _("Done"); case TR_SEED: return _("Complete"); default: return _("Incomplete"); } } static void fireCompletenessChange(tr_torrent* tor, tr_completeness status, bool wasRunning) { TR_ASSERT(status == TR_LEECH || status == TR_SEED || status == TR_PARTIAL_SEED); if (tor->completeness_func != nullptr) { (*tor->completeness_func)(tor, status, wasRunning, tor->completeness_func_user_data); } } void tr_torrentSetCompletenessCallback(tr_torrent* tor, tr_torrent_completeness_func func, void* user_data) { TR_ASSERT(tr_isTorrent(tor)); tor->completeness_func = func; tor->completeness_func_user_data = user_data; } void tr_torrentClearCompletenessCallback(tr_torrent* torrent) { tr_torrentSetCompletenessCallback(torrent, nullptr, nullptr); } void tr_torrentSetRatioLimitHitCallback(tr_torrent* tor, tr_torrent_ratio_limit_hit_func func, void* user_data) { TR_ASSERT(tr_isTorrent(tor)); tor->ratio_limit_hit_func = func; tor->ratio_limit_hit_func_user_data = user_data; } void tr_torrentClearRatioLimitHitCallback(tr_torrent* torrent) { tr_torrentSetRatioLimitHitCallback(torrent, nullptr, nullptr); } void tr_torrentSetIdleLimitHitCallback(tr_torrent* tor, tr_torrent_idle_limit_hit_func func, void* user_data) { TR_ASSERT(tr_isTorrent(tor)); tor->idle_limit_hit_func = func; tor->idle_limit_hit_func_user_data = user_data; } void tr_torrentClearIdleLimitHitCallback(tr_torrent* torrent) { tr_torrentSetIdleLimitHitCallback(torrent, nullptr, nullptr); } static std::string buildLabelsString(tr_torrent const* tor) { auto buf = std::stringstream{}; for (auto it = std::begin(tor->labels), end = std::end(tor->labels); it != end;) { buf << *it; if (++it != end) { buf << ','; } } return buf.str(); } static std::string buildTrackersString(tr_torrent const* tor) { auto buf = std::stringstream{}; for (size_t i = 0, n = tr_torrentTrackerCount(tor); i < n; ++i) { buf << tr_torrentTracker(tor, i).host; if (++i < n) { buf << ','; } } return buf.str(); } static void torrentCallScript(tr_torrent const* tor, char const* script) { if (tr_str_is_empty(script)) { return; } time_t const now = tr_time(); struct tm tm; char ctime_str[32]; tr_localtime_r(&now, &tm); strftime(ctime_str, sizeof(ctime_str), "%a %b %d %T %Y%n", &tm); /* ctime equiv */ auto torrent_dir = std::string{ tor->currentDir().sv() }; tr_sys_path_native_separators(std::data(torrent_dir)); auto const cmd = std::array{ script, nullptr, }; auto const id_str = std::to_string(tr_torrentId(tor)); auto const labels_str = buildLabelsString(tor); auto const trackers_str = buildTrackersString(tor); auto const env = std::map{ { "TR_APP_VERSION"sv, SHORT_VERSION_STRING }, { "TR_TIME_LOCALTIME"sv, ctime_str }, { "TR_TORRENT_DIR"sv, torrent_dir.c_str() }, { "TR_TORRENT_HASH"sv, tor->infoHashString() }, { "TR_TORRENT_ID"sv, id_str }, { "TR_TORRENT_LABELS"sv, labels_str }, { "TR_TORRENT_NAME"sv, tr_torrentName(tor) }, { "TR_TORRENT_TRACKERS"sv, trackers_str }, }; tr_logAddTorInfo(tor, "Calling script \"%s\"", script); tr_error* error = nullptr; if (!tr_spawn_async(std::data(cmd), env, TR_IF_WIN32("\\", "/"), &error)) { tr_logAddTorErr(tor, "Error executing script \"%s\" (%d): %s", script, error->code, error->message); tr_error_free(error); } } void tr_torrent::recheckCompleteness() { auto const lock = unique_lock(); auto const new_completeness = completion.status(); if (new_completeness != completeness) { bool const recentChange = downloadedCur != 0; bool const wasLeeching = !this->isDone(); bool const wasRunning = isRunning; if (recentChange) { tr_logAddTorInfo( this, _("State changed from \"%1$s\" to \"%2$s\""), getCompletionString(this->completeness), getCompletionString(completeness)); } this->completeness = new_completeness; tr_fdTorrentClose(this->session, this->uniqueId); if (this->isDone()) { if (recentChange) { tr_announcerTorrentCompleted(this); this->markChanged(); this->doneDate = tr_time(); } if (wasLeeching && wasRunning) { /* clear interested flag on all peers */ tr_peerMgrClearInterest(this); } if (this->currentDir() == this->incompleteDir()) { this->setLocation(this->downloadDir().sv(), true, nullptr, nullptr); } } fireCompletenessChange(this, completeness, wasRunning); if (this->isDone() && wasLeeching && wasRunning) { /* if completeness was TR_LEECH, the seed limit check will have been skipped in bandwidthPulse */ tr_torrentCheckSeedLimit(this); } this->setDirty(); if (this->isDone()) { tr_torrentSave(this); callScriptIfEnabled(this, TR_SCRIPT_ON_TORRENT_DONE); } } } /*** **** ***/ static void tr_torrentFireMetadataCompleted(tr_torrent* tor) { TR_ASSERT(tr_isTorrent(tor)); if (tor->metadata_func != nullptr) { (*tor->metadata_func)(tor, tor->metadata_func_user_data); } } void tr_torrentSetMetadataCallback(tr_torrent* tor, tr_torrent_metadata_func func, void* user_data) { TR_ASSERT(tr_isTorrent(tor)); tor->metadata_func = func; tor->metadata_func_user_data = user_data; } /** *** File DND **/ void tr_torrentSetFileDLs(tr_torrent* tor, tr_file_index_t const* files, tr_file_index_t n_files, bool wanted) { TR_ASSERT(tr_isTorrent(tor)); tor->setFilesWanted(files, n_files, wanted); } /*** **** ***/ void tr_torrentSetLabels(tr_torrent* tor, tr_labels_t&& labels) { TR_ASSERT(tr_isTorrent(tor)); auto const lock = tor->unique_lock(); tor->labels = std::move(labels); tor->setDirty(); } /*** **** ***/ tr_priority_t tr_torrentGetPriority(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->bandwidth->getPriority(); } void tr_torrentSetPriority(tr_torrent* tor, tr_priority_t priority) { TR_ASSERT(tr_isTorrent(tor)); TR_ASSERT(tr_isPriority(priority)); if (tor->bandwidth->getPriority() != priority) { tor->bandwidth->setPriority(priority); tor->setDirty(); } } /*** **** ***/ void tr_torrentSetPeerLimit(tr_torrent* tor, uint16_t maxConnectedPeers) { TR_ASSERT(tr_isTorrent(tor)); if (tor->maxConnectedPeers != maxConnectedPeers) { tor->maxConnectedPeers = maxConnectedPeers; tor->setDirty(); } } uint16_t tr_torrentGetPeerLimit(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); return tor->maxConnectedPeers; } /*** **** ***/ void tr_torrentGetBlockLocation( tr_torrent const* tor, tr_block_index_t block, tr_piece_index_t* piece, uint32_t* offset, uint32_t* length) { uint64_t pos = block; pos *= tor->blockSize(); *piece = pos / tor->pieceSize(); uint64_t piece_begin = tor->pieceSize(); piece_begin *= *piece; *offset = pos - piece_begin; *length = tor->blockSize(block); } bool tr_torrentReqIsValid(tr_torrent const* tor, tr_piece_index_t index, uint32_t offset, uint32_t length) { TR_ASSERT(tr_isTorrent(tor)); int err = 0; if (index >= tor->pieceCount()) { err = 1; } else if (length < 1) { err = 2; } else if (offset + length > tor->pieceSize(index)) { err = 3; } else if (length > MAX_BLOCK_SIZE) { err = 4; } else if (tor->offset(index, offset, length) > tor->totalSize()) { err = 5; } if (err != 0) { tr_logAddTorDbg( tor, "index %lu offset %lu length %lu err %d\n", (unsigned long)index, (unsigned long)offset, (unsigned long)length, err); } return err == 0; } // TODO(ckerr) migrate to fpm? tr_block_span_t tr_torGetFileBlockSpan(tr_torrent const* tor, tr_file_index_t i) { auto const [begin_byte, end_byte] = tor->fpm_.byteSpan(i); auto const begin_block = tor->blockOf(begin_byte); if (begin_byte >= end_byte) { return { begin_block, begin_block }; } auto const final_byte = end_byte - 1; auto const end_block = tor->blockOf(final_byte) + 1; return { begin_block, end_block }; } /*** **** ***/ // TODO: should be const after tr_ioTestPiece() is const bool tr_torrent::checkPiece(tr_piece_index_t piece) { bool const pass = tr_ioTestPiece(this, piece); tr_logAddTorDbg(this, "[LAZY] tr_torrent.checkPiece tested piece %zu, pass==%d", size_t(piece), int(pass)); return pass; } /*** **** ***/ bool tr_torrentSetAnnounceList(tr_torrent* tor, char const* const* announce_urls, tr_tracker_tier_t const* tiers, size_t n) { TR_ASSERT(tr_isTorrent(tor)); auto const lock = tor->unique_lock(); auto announce_list = tr_announce_list(); if (!announce_list.set(announce_urls, tiers, n) || !announce_list.save(tor->torrentFile())) { return false; } tor->metainfo_.announceList() = announce_list; tor->markEdited(); /* if we had a tracker-related error on this torrent, * and that tracker's been removed, * then clear the error */ if (tor->error == TR_STAT_TRACKER_WARNING || tor->error == TR_STAT_TRACKER_ERROR) { auto const error_url = tor->error_announce_url; if (std::any_of( std::begin(tor->announceList()), std::end(tor->announceList()), [error_url](auto const& tracker) { return tracker.announce_str == error_url; })) { tr_torrentClearError(tor); } } /* tell the announcer to reload this torrent's tracker list */ tr_announcerResetTorrent(tor->session->announcer, tor); return true; } /** *** **/ uint64_t tr_torrentGetBytesLeftToAllocate(tr_torrent const* tor) { TR_ASSERT(tr_isTorrent(tor)); uint64_t bytesLeft = 0; for (tr_file_index_t i = 0, n = tor->fileCount(); i < n; ++i) { auto const file = tr_torrentFile(tor, i); if (file.wanted) { uint64_t const length = file.length; char* path = tr_torrentFindFile(tor, i); bytesLeft += length; tr_sys_path_info info; if (path != nullptr && tr_sys_path_get_info(path, 0, &info, nullptr) && info.type == TR_SYS_PATH_IS_FILE && info.size <= length) { bytesLeft -= info.size; } tr_free(path); } } return bytesLeft; } /**** ***** Removing the torrent's local data ****/ static constexpr bool isJunkFile(std::string_view base) { auto constexpr Files = std::array{ ".DS_Store"sv, "Thumbs.db"sv, "desktop.ini"sv, }; // TODO(C++20): std::any_of is constexpr in C++20 for (auto const& file : Files) { if (file == base) { return true; } } #ifdef __APPLE__ // check for resource forks. if (tr_strvStartsWith(base, "._"sv)) { return true; } #endif return false; } static void removeEmptyFoldersAndJunkFiles(char const* folder) { auto const odir = tr_sys_dir_open(folder, nullptr); if (odir == TR_BAD_SYS_DIR) { return; } char const* name = nullptr; while ((name = tr_sys_dir_read_name(odir, nullptr)) != nullptr) { if (strcmp(name, ".") != 0 && strcmp(name, "..") != 0) { auto const filename = tr_strvPath(folder, name); auto info = tr_sys_path_info{}; if (tr_sys_path_get_info(filename.c_str(), 0, &info, nullptr) && info.type == TR_SYS_PATH_IS_DIRECTORY) { removeEmptyFoldersAndJunkFiles(filename.c_str()); } else if (isJunkFile(name)) { tr_sys_path_remove(filename.c_str(), nullptr); } } } tr_sys_path_remove(folder, nullptr); tr_sys_dir_close(odir, nullptr); } /** * This convoluted code does something (seemingly) simple: * remove the torrent's local files. * * Fun complications: * 1. Try to preserve the directory hierarchy in the recycle bin. * 2. If there are nontorrent files, don't delete them... * 3. ...unless the other files are "junk", such as .DS_Store */ static void deleteLocalData(tr_torrent const* tor, tr_fileFunc func) { auto files = std::vector{}; auto folders = std::set{}; char const* const top = tor->currentDir().c_str(); /* don't try to delete local data if the directory's gone missing */ if (!tr_sys_path_exists(top, nullptr)) { return; } /* if it's a magnet link, there's nothing to move... */ if (!tor->hasMetadata()) { return; } /*** **** Move the local data to a new tmpdir ***/ auto tmpdir = tr_strvPath(top, tr_torrentName(tor) + "__XXXXXX"s); tr_sys_dir_create_temp(std::data(tmpdir), nullptr); for (tr_file_index_t f = 0, n = tor->fileCount(); f < n; ++f) { /* try to find the file, looking in the partial and download dirs */ auto filename = tr_strvPath(top, tor->fileSubpath(f)); if (!tr_sys_path_exists(filename.c_str(), nullptr)) { filename += ".part"sv; if (!tr_sys_path_exists(filename.c_str(), nullptr)) { filename.clear(); } } /* if we found the file, move it */ if (!std::empty(filename)) { auto target = tr_strvPath(tmpdir, tor->fileSubpath(f)); tr_moveFile(filename.c_str(), target.c_str(), nullptr); files.emplace_back(target); } } /*** **** Remove tmpdir. **** **** Try deleting the top-level files & folders to preserve **** the directory hierarchy in the recycle bin. **** If case that fails -- for example, rmdir () doesn't **** delete nonempty folders -- go from the bottom up too. ***/ /* try deleting the local data's top-level files & folders */ if (auto const odir = tr_sys_dir_open(tmpdir.c_str(), nullptr); odir != TR_BAD_SYS_DIR) { char const* name = nullptr; while ((name = tr_sys_dir_read_name(odir, nullptr)) != nullptr) { if (strcmp(name, ".") != 0 && strcmp(name, "..") != 0) { auto const file = tr_strvPath(tmpdir, name); (*func)(file.c_str(), nullptr); } } tr_sys_dir_close(odir, nullptr); } /* go from the bottom up */ for (auto const& file : files) { char* walk = tr_strvDup(file); while (tr_sys_path_exists(walk, nullptr) && !tr_sys_path_is_same(tmpdir.c_str(), walk, nullptr)) { char* tmp = tr_sys_path_dirname(walk, nullptr); (*func)(walk, nullptr); tr_free(walk); walk = tmp; } tr_free(walk); } /*** **** The local data has been removed. **** What's left in top are empty folders, junk, and user-generated files. **** Remove the first two categories and leave the third. ***/ /* build a list of 'top's child directories that belong to this torrent */ for (tr_file_index_t f = 0, n = tor->fileCount(); f < n; ++f) { /* get the directory that this file goes in... */ auto const filename = tr_strvPath(top, tor->fileSubpath(f)); char* dir = tr_sys_path_dirname(filename.c_str(), nullptr); if (dir == nullptr) { continue; } /* walk up the directory tree until we reach 'top' */ if (!tr_sys_path_is_same(top, dir, nullptr) && strcmp(top, dir) != 0) { for (;;) { char* parent = tr_sys_path_dirname(dir, nullptr); if (tr_sys_path_is_same(top, parent, nullptr) || strcmp(top, parent) == 0) { folders.emplace(dir); tr_free(parent); break; } /* walk upwards to parent */ tr_free(dir); dir = parent; } } tr_free(dir); } for (auto const& folder : folders) { removeEmptyFoldersAndJunkFiles(folder.c_str()); } /* cleanup */ tr_sys_path_remove(tmpdir.c_str(), nullptr); } static void tr_torrentDeleteLocalData(tr_torrent* tor, tr_fileFunc func) { TR_ASSERT(tr_isTorrent(tor)); if (func == nullptr) { func = tr_sys_path_remove; } /* close all the files because we're about to delete them */ tr_cacheFlushTorrent(tor->session->cache, tor); tr_fdTorrentClose(tor->session, tor->uniqueId); deleteLocalData(tor, func); } /*** **** ***/ struct LocationData { std::string location; tr_torrent* tor = nullptr; double volatile* setme_progress = nullptr; int volatile* setme_state = nullptr; bool move_from_old_location = false; }; static void setLocationImpl(void* vdata) { auto* data = static_cast(vdata); tr_torrent* tor = data->tor; TR_ASSERT(tr_isTorrent(tor)); auto const lock = tor->unique_lock(); bool err = false; bool const do_move = data->move_from_old_location; auto const& location = data->location; double bytesHandled = 0; tr_logAddDebug( "Moving \"%s\" location from currentDir \"%s\" to \"%s\"", tr_torrentName(tor), tor->currentDir().c_str(), location.c_str()); tr_sys_dir_create(location.c_str(), TR_SYS_DIR_CREATE_PARENTS, 0777, nullptr); if (!tr_sys_path_is_same(location.c_str(), tor->currentDir().c_str(), nullptr)) { /* bad idea to move files while they're being verified... */ tr_verifyRemove(tor); /* try to move the files. * FIXME: there are still all kinds of nasty cases, like what * if the target directory runs out of space halfway through... */ for (tr_file_index_t i = 0, n = tor->fileCount(); !err && i < n; ++i) { auto const file_size = tor->fileSize(i); char const* oldbase = nullptr; char* sub = nullptr; if (tr_torrentFindFile2(tor, i, &oldbase, &sub, nullptr)) { auto const oldpath = tr_strvPath(oldbase, sub); auto const newpath = tr_strvPath(location, sub); tr_logAddDebug("Found file #%d: %s", (int)i, oldpath.c_str()); if (do_move && !tr_sys_path_is_same(oldpath.c_str(), newpath.c_str(), nullptr)) { tr_error* error = nullptr; tr_logAddTorInfo(tor, "moving \"%s\" to \"%s\"", oldpath.c_str(), newpath.c_str()); if (!tr_moveFile(oldpath.c_str(), newpath.c_str(), &error)) { err = true; tr_logAddTorErr( tor, "error moving \"%s\" to \"%s\": %s", oldpath.c_str(), newpath.c_str(), error->message); tr_error_free(error); } } tr_free(sub); } if (data->setme_progress != nullptr) { bytesHandled += file_size; *data->setme_progress = bytesHandled / tor->totalSize(); } } if (!err && do_move) { /* blow away the leftover subdirectories in the old location */ tr_torrentDeleteLocalData(tor, tr_sys_path_remove); } } if (!err) { /* set the new location and reverify */ tr_torrentSetDownloadDir(tor, location.c_str()); if (do_move) { tor->incomplete_dir.clear(); tor->current_dir = tor->downloadDir(); } } if (data->setme_state != nullptr) { *data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE; } /* cleanup */ delete data; } void tr_torrent::setLocation( std::string_view location, bool move_from_old_location, double volatile* setme_progress, int volatile* setme_state) { if (setme_state != nullptr) { *setme_state = TR_LOC_MOVING; } if (setme_progress != nullptr) { *setme_progress = 0; } /* run this in the libtransmission thread */ auto* const data = new LocationData{}; data->tor = this; data->location = location; data->move_from_old_location = move_from_old_location; data->setme_state = setme_state; data->setme_progress = setme_progress; tr_runInEventThread(this->session, setLocationImpl, data); } void tr_torrentSetLocation( tr_torrent* tor, char const* location, bool move_from_old_location, double volatile* setme_progress, int volatile* setme_state) { TR_ASSERT(tr_isTorrent(tor)); TR_ASSERT(!tr_str_is_empty(location)); return tor->setLocation(location ? location : "", move_from_old_location, setme_progress, setme_state); } std::string_view tr_torrent::primaryMimeType() const { // count up how many bytes there are for each mime-type in the torrent // NB: get_mime_type_for_filename() always returns the same ptr for a // mime_type, so its raw pointer can be used as a key. auto size_per_mime_type = std::unordered_map{}; for (tr_file_index_t i = 0, n = this->fileCount(); i < n; ++i) { auto const mime_type = tr_get_mime_type_for_filename(this->fileSubpath(i)); size_per_mime_type[mime_type] += this->fileSize(i); } if (std::empty(size_per_mime_type)) { // https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types // application/octet-stream is the default value for all other cases. // An unknown file type should use this type. auto constexpr Fallback = "application/octet-stream"sv; return Fallback; } auto const it = std::max_element( std::begin(size_per_mime_type), std::end(size_per_mime_type), [](auto const& a, auto const& b) { return a.second < b.second; }); return it->first; } /*** **** ***/ static void tr_torrentFileCompleted(tr_torrent* tor, tr_file_index_t i) { /* close the file so that we can reopen in read-only mode as needed */ tr_cacheFlushFile(tor->session->cache, tor, i); tr_fdFileClose(tor->session, tor, i); /* now that the file is complete and closed, we can start watching its * mtime timestamp for changes to know if we need to reverify pieces */ tor->file_mtimes_[i] = tr_time(); /* if the torrent's current filename isn't the same as the one in the * metadata -- for example, if it had the ".part" suffix appended to * it until now -- then rename it to match the one in the metadata */ char const* base = nullptr; char* sub = nullptr; if (tr_torrentFindFile2(tor, i, &base, &sub, nullptr)) { if (auto const& file_subpath = tor->fileSubpath(i); file_subpath != sub) { auto const oldpath = tr_strvPath(base, sub); auto const newpath = tr_strvPath(base, file_subpath); tr_error* error = nullptr; if (!tr_sys_path_rename(oldpath.c_str(), newpath.c_str(), &error)) { tr_logAddTorErr(tor, "Error moving \"%s\" to \"%s\": %s", oldpath.c_str(), newpath.c_str(), error->message); tr_error_free(error); } } tr_free(sub); } } static void tr_torrentPieceCompleted(tr_torrent* tor, tr_piece_index_t pieceIndex) { tr_peerMgrPieceCompleted(tor, pieceIndex); // if this piece completes any file, invoke the fileCompleted func for it auto const [begin, end] = tor->fpm_.fileSpan(pieceIndex); for (tr_file_index_t file = begin; file < end; ++file) { if (tor->completion.hasBlocks(tr_torGetFileBlockSpan(tor, file))) { tr_torrentFileCompleted(tor, file); } } } void tr_torrentGotBlock(tr_torrent* tor, tr_block_index_t block) { TR_ASSERT(tr_isTorrent(tor)); TR_ASSERT(tr_amInEventThread(tor->session)); bool const block_is_new = !tor->hasBlock(block); if (block_is_new) { tor->completion.addBlock(block); tor->setDirty(); tr_piece_index_t const p = tor->pieceForBlock(block); if (tor->hasPiece(p)) { if (tor->checkPiece(p)) { tr_torrentPieceCompleted(tor, p); } else { uint32_t const n = tor->pieceSize(p); tr_logAddTorErr(tor, _("Piece %" PRIu32 ", which was just downloaded, failed its checksum test"), p); tor->corruptCur += n; tor->downloadedCur -= std::min(tor->downloadedCur, uint64_t{ n }); tr_peerMgrGotBadPiece(tor, p); } } } else { uint32_t const n = tor->blockSize(block); tor->downloadedCur -= std::min(tor->downloadedCur, uint64_t{ n }); tr_logAddTorDbg(tor, "we have this block already..."); } } /*** **** ***/ std::optional tr_torrent::findFile(std::string& filename, tr_file_index_t i) const { auto const subpath = std::string_view{ this->fileSubpath(i) }; auto file_info = tr_sys_path_info{}; if (!std::empty(this->downloadDir())) { auto const base = this->downloadDir().sv(); tr_buildBuf(filename, base, "/"sv, subpath); if (tr_sys_path_get_info(filename.c_str(), 0, &file_info, nullptr)) { return tr_found_file_t{ file_info, filename, base }; } tr_buildBuf(filename, base, "/"sv, subpath, ".part"sv); if (tr_sys_path_get_info(filename.c_str(), 0, &file_info, nullptr)) { return tr_found_file_t{ file_info, filename, base }; } } if (!std::empty(this->incompleteDir())) { auto const base = this->incompleteDir().sv(); tr_buildBuf(filename, base, "/"sv, subpath); if (tr_sys_path_get_info(filename.c_str(), 0, &file_info, nullptr)) { return tr_found_file_t{ file_info, filename, base }; } tr_buildBuf(filename, base, "/"sv, subpath, ".part"sv); if (tr_sys_path_get_info(filename.c_str(), 0, &file_info, nullptr)) { return tr_found_file_t{ file_info, filename, base }; } } return {}; } // TODO: clients that call this should call tr_torrent::findFile() instead bool tr_torrentFindFile2(tr_torrent const* tor, tr_file_index_t fileNum, char const** base, char** subpath, time_t* mtime) { auto filename = std::string{}; auto const found = tor->findFile(filename, fileNum); if (!found) { return false; } if (base != nullptr) { *base = std::data(found->base); } if (subpath != nullptr) { *subpath = tr_strvDup(found->subpath); } if (mtime != nullptr) { *mtime = found->last_modified_at; } return true; } // TODO: clients that call this should call tr_torrent::findFile() instead char* tr_torrentFindFile(tr_torrent const* tor, tr_file_index_t fileNum) { auto filename = std::string{}; auto const found = tor->findFile(filename, fileNum); return found ? tr_strdup(filename.c_str()) : nullptr; } /* Decide whether we should be looking for files in downloadDir or incompleteDir. */ static void refreshCurrentDir(tr_torrent* tor) { tr_interned_string dir; if (std::empty(tor->incompleteDir())) { dir = tor->downloadDir(); } else if (!tor->hasMetadata()) /* no files to find */ { dir = tor->incompleteDir(); } else { auto filename = std::string{}; auto const found = tor->findFile(filename, 0); dir = found ? tr_interned_string{ found->base } : tor->incompleteDir(); } TR_ASSERT(!std::empty(dir)); TR_ASSERT(dir == tor->downloadDir() || dir == tor->incompleteDir()); tor->current_dir = dir; } char* tr_torrentBuildPartial(tr_torrent const* tor, tr_file_index_t i) { return tr_strvDup(tr_strvJoin(tor->fileSubpath(i), ".part"sv)); } /*** **** ***/ #ifdef TR_ENABLE_ASSERTS static bool queueIsSequenced(tr_session* session) { auto torrents = tr_sessionGetTorrents(session); std::sort( std::begin(torrents), std::end(torrents), [](auto const* a, auto const* b) { return a->queuePosition < b->queuePosition; }); #if 0 fprintf(stderr, "%s", "queue: "); for (int i = 0; i < n; ++i) { fprintf(stderr, "%d ", tmp[i]->queuePosition); } fputc('\n', stderr); #endif /* test them */ bool is_sequenced = true; for (int i = 0, n = std::size(torrents); is_sequenced && i < n; ++i) { is_sequenced = torrents[i]->queuePosition == i; } return is_sequenced; } #endif int tr_torrentGetQueuePosition(tr_torrent const* tor) { return tor->queuePosition; } void tr_torrentSetQueuePosition(tr_torrent* tor, int pos) { int back = -1; int const old_pos = tor->queuePosition; if (pos < 0) { pos = 0; } tor->queuePosition = -1; for (auto* walk : tor->session->torrents) { if ((old_pos < pos) && (old_pos <= walk->queuePosition) && (walk->queuePosition <= pos)) { walk->queuePosition--; walk->markChanged(); } if ((old_pos > pos) && (pos <= walk->queuePosition) && (walk->queuePosition < old_pos)) { walk->queuePosition++; walk->markChanged(); } if (back < walk->queuePosition) { back = walk->queuePosition; } } tor->queuePosition = std::min(pos, back + 1); tor->markChanged(); TR_ASSERT(queueIsSequenced(tor->session)); } struct CompareTorrentByQueuePosition { bool operator()(tr_torrent const* a, tr_torrent const* b) const { return a->queuePosition < b->queuePosition; } }; void tr_torrentsQueueMoveTop(tr_torrent* const* torrents_in, size_t n) { auto torrents = std::vector(torrents_in, torrents_in + n); std::sort(std::rbegin(torrents), std::rend(torrents), CompareTorrentByQueuePosition{}); for (auto* tor : torrents) { tr_torrentSetQueuePosition(tor, 0); } } void tr_torrentsQueueMoveUp(tr_torrent* const* torrents_in, size_t n) { auto torrents = std::vector(torrents_in, torrents_in + n); std::sort(std::begin(torrents), std::end(torrents), CompareTorrentByQueuePosition{}); for (auto* tor : torrents) { tr_torrentSetQueuePosition(tor, tor->queuePosition - 1); } } void tr_torrentsQueueMoveDown(tr_torrent* const* torrents_in, size_t n) { auto torrents = std::vector(torrents_in, torrents_in + n); std::sort(std::rbegin(torrents), std::rend(torrents), CompareTorrentByQueuePosition{}); for (auto* tor : torrents) { tr_torrentSetQueuePosition(tor, tor->queuePosition + 1); } } void tr_torrentsQueueMoveBottom(tr_torrent* const* torrents_in, size_t n) { auto torrents = std::vector(torrents_in, torrents_in + n); std::sort(std::begin(torrents), std::end(torrents), CompareTorrentByQueuePosition{}); for (auto* tor : torrents) { tr_torrentSetQueuePosition(tor, INT_MAX); } } static void torrentSetQueued(tr_torrent* tor, bool queued) { TR_ASSERT(tr_isTorrent(tor)); if (tor->isQueued() != queued) { tor->is_queued = queued; tor->markChanged(); tor->setDirty(); } } void tr_torrentSetQueueStartCallback(tr_torrent* torrent, void (*callback)(tr_torrent*, void*), void* user_data) { torrent->queue_started_callback = callback; torrent->queue_started_user_data = user_data; } /*** **** **** RENAME **** ***/ static bool renameArgsAreValid(char const* oldpath, char const* newname) { return !tr_str_is_empty(oldpath) && !tr_str_is_empty(newname) && strcmp(newname, ".") != 0 && strcmp(newname, "..") != 0 && strchr(newname, TR_PATH_DELIMITER) == nullptr; } static auto renameFindAffectedFiles(tr_torrent const* tor, std::string_view oldpath) { auto indices = std::vector{}; auto oldpath_as_dir = tr_strvJoin(oldpath, "/"sv); auto const n_files = tor->fileCount(); for (tr_file_index_t i = 0; i < n_files; ++i) { auto const& name = tor->fileSubpath(i); if (name == oldpath || tr_strvStartsWith(name, oldpath_as_dir)) { indices.push_back(i); } } return indices; } static int renamePath(tr_torrent* tor, char const* oldpath, char const* newname) { int err = 0; auto const base = tor->isDone() || std::empty(tor->incompleteDir()) ? tor->downloadDir().sv() : tor->incompleteDir().sv(); auto src = tr_strvPath(base, oldpath); if (!tr_sys_path_exists(src.c_str(), nullptr)) /* check for it as a partial */ { src += ".part"sv; } if (tr_sys_path_exists(src.c_str(), nullptr)) { char* const parent = tr_sys_path_dirname(src.c_str(), nullptr); auto const tgt = tr_strvEndsWith(src, ".part"sv) ? tr_strvJoin(parent, TR_PATH_DELIMITER_STR, newname, ".part"sv) : tr_strvPath(parent, newname); auto tmp = errno; bool const tgt_exists = tr_sys_path_exists(tgt.c_str(), nullptr); errno = tmp; if (!tgt_exists) { tr_error* error = nullptr; tmp = errno; if (!tr_sys_path_rename(src.c_str(), tgt.c_str(), &error)) { err = error->code; tr_error_free(error); } errno = tmp; } tr_free(parent); } return err; } static void renameTorrentFileString(tr_torrent* tor, char const* oldpath, char const* newname, tr_file_index_t file_index) { auto name = std::string{}; auto const subpath = std::string_view{ tor->fileSubpath(file_index) }; auto const oldpath_len = strlen(oldpath); if (strchr(oldpath, TR_PATH_DELIMITER) == nullptr) { if (oldpath_len >= std::size(subpath)) { name = tr_strvPath(newname); } else { name = tr_strvPath(newname, subpath.substr(oldpath_len + 1)); } } else { char* tmp = tr_sys_path_dirname(oldpath, nullptr); if (tmp == nullptr) { return; } if (oldpath_len >= std::size(subpath)) { name = tr_strvPath(tmp, newname); } else { name = tr_strvPath(tmp, newname, subpath.substr(oldpath_len + 1)); } tr_free(tmp); } if (subpath != name) { tor->setFileSubpath(file_index, name); } } struct rename_data { tr_torrent* tor; char* oldpath; char* newname; tr_torrent_rename_done_func callback; void* callback_user_data; }; static void torrentRenamePath(void* vdata) { auto* data = static_cast(vdata); tr_torrent* const tor = data->tor; TR_ASSERT(tr_isTorrent(tor)); /*** **** ***/ int error = 0; char const* const oldpath = data->oldpath; char const* const newname = data->newname; if (!renameArgsAreValid(oldpath, newname)) { error = EINVAL; } else { auto const file_indices = renameFindAffectedFiles(tor, oldpath); if (std::empty(file_indices)) { error = EINVAL; } else { error = renamePath(tor, oldpath, newname); if (error == 0) { /* update tr_info.files */ for (auto const& file_index : file_indices) { renameTorrentFileString(tor, oldpath, newname, file_index); } /* update tr_info.name if user changed the toplevel */ if (std::size(file_indices) == tor->fileCount() && strchr(oldpath, '/') == nullptr) { tor->setName(newname); } tor->markEdited(); tor->setDirty(); } } } /*** **** ***/ tor->markChanged(); /* callback */ if (data->callback != nullptr) { (*data->callback)(tor, data->oldpath, data->newname, error, data->callback_user_data); } /* cleanup */ tr_free(data->oldpath); tr_free(data->newname); tr_free(data); } void tr_torrent::renamePath( std::string_view oldpath, std::string_view newname, tr_torrent_rename_done_func callback, void* callback_user_data) { auto* const data = tr_new0(struct rename_data, 1); data->tor = this; data->oldpath = tr_strvDup(oldpath); data->newname = tr_strvDup(newname); data->callback = callback; data->callback_user_data = callback_user_data; tr_runInEventThread(this->session, torrentRenamePath, data); } void tr_torrentRenamePath( tr_torrent* tor, char const* oldpath, char const* newname, tr_torrent_rename_done_func callback, void* callback_user_data) { oldpath = oldpath != nullptr ? oldpath : ""; newname = newname != nullptr ? newname : ""; tor->renamePath(oldpath, newname, callback, callback_user_data); } void tr_torrentSetFilePriorities( tr_torrent* tor, tr_file_index_t const* files, tr_file_index_t fileCount, tr_priority_t priority) { tor->setFilePriorities(files, fileCount, priority); } bool tr_torrentHasMetadata(tr_torrent const* tor) { return tor->hasMetadata(); } void tr_torrent::markEdited() { this->editDate = tr_time(); } void tr_torrent::markChanged() { this->anyDate = tr_time(); } void tr_torrent::setDateActive(time_t t) { this->activityDate = t; this->anyDate = std::max(this->anyDate, this->activityDate); } void tr_torrent::setBlocks(tr_bitfield blocks) { this->completion.setBlocks(std::move(blocks)); } [[nodiscard]] bool tr_torrent::ensurePieceIsChecked(tr_piece_index_t piece) { TR_ASSERT(piece < this->pieceCount()); if (checked_pieces_.test(piece)) { return true; } bool const checked = checkPiece(piece); this->markChanged(); this->setDirty(); checked_pieces_.set(piece, checked); return checked; } void tr_torrent::initCheckedPieces(tr_bitfield const& checked, time_t const* mtimes /*fileCount()*/) { TR_ASSERT(std::size(checked) == this->pieceCount()); checked_pieces_ = checked; auto const n = this->fileCount(); this->file_mtimes_.resize(n); auto filename = std::string{}; for (size_t i = 0; i < n; ++i) { auto const found = this->findFile(filename, i); auto const mtime = found ? found->last_modified_at : 0; this->file_mtimes_[i] = mtime; // if a file has changed, mark its pieces as unchecked if (mtime == 0 || mtime != mtimes[i]) { auto const [begin, end] = piecesInFile(i); checked_pieces_.unsetSpan(begin, end); } } }