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transmission/libtransmission/torrent.c

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/*
* This file Copyright (C) Mnemosyne LLC
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2 (b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
* $Id$
*/
#include <signal.h> /* signal () */
#include <sys/types.h> /* stat */
#include <sys/stat.h> /* stat */
#ifndef WIN32
#include <sys/wait.h> /* wait () */
#else
#include <process.h>
#define waitpid(pid, status, options) _cwait (status, pid, WAIT_CHILD)
#endif
#include <unistd.h> /* stat */
#include <dirent.h>
#include <assert.h>
#include <math.h>
#include <stdarg.h>
#include <string.h> /* memcmp */
#include <stdlib.h> /* qsort */
#include <stdio.h> /* remove () */
#include <event2/util.h> /* evutil_vsnprintf () */
#include "transmission.h"
#include "announcer.h"
#include "bandwidth.h"
#include "cache.h"
#include "completion.h"
#include "crypto.h" /* for tr_sha1 */
#include "resume.h"
#include "fdlimit.h" /* tr_fdTorrentClose */
#include "inout.h" /* tr_ioTestPiece () */
#include "magnet.h"
#include "metainfo.h"
#include "peer-common.h" /* MAX_BLOCK_SIZE */
#include "peer-mgr.h"
#include "platform.h" /* TR_PATH_DELIMITER_STR */
#include "ptrarray.h"
#include "session.h"
#include "torrent.h"
#include "torrent-magnet.h"
#include "trevent.h" /* tr_runInEventThread () */
#include "utils.h"
#include "variant.h"
#include "verify.h"
#include "version.h"
/***
****
***/
#define tr_deeplog_tor(tor, ...) \
do \
{ \
if (tr_deepLoggingIsActive ()) \
tr_deepLog (__FILE__, __LINE__, tr_torrentName (tor), __VA_ARGS__); \
} \
while (0)
/***
****
***/
const char *
tr_torrentName (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tor->info.name;
}
int
tr_torrentId (const tr_torrent * tor)
{
return tor->uniqueId;
}
tr_torrent*
tr_torrentFindFromId (tr_session * session, int id)
{
tr_torrent * tor = NULL;
while ((tor = tr_torrentNext (session, tor)))
if (tor->uniqueId == id)
return tor;
return NULL;
}
tr_torrent*
tr_torrentFindFromHashString (tr_session * session, const char * str)
{
tr_torrent * tor = NULL;
while ((tor = tr_torrentNext (session, tor)))
if (!evutil_ascii_strcasecmp (str, tor->info.hashString))
return tor;
return NULL;
}
tr_torrent*
tr_torrentFindFromHash (tr_session * session, const uint8_t * torrentHash)
{
tr_torrent * tor = NULL;
while ((tor = tr_torrentNext (session, tor)))
if (*tor->info.hash == *torrentHash)
if (!memcmp (tor->info.hash, torrentHash, SHA_DIGEST_LENGTH))
return tor;
return NULL;
}
tr_torrent*
tr_torrentFindFromMagnetLink (tr_session * session, const char * magnet)
{
tr_magnet_info * info;
tr_torrent * tor = NULL;
if ((info = tr_magnetParse (magnet)))
{
tor = tr_torrentFindFromHash (session, info->hash);
tr_magnetFree (info);
}
return tor;
}
tr_torrent*
tr_torrentFindFromObfuscatedHash (tr_session * session,
const uint8_t * obfuscatedTorrentHash)
{
tr_torrent * tor = NULL;
while ((tor = tr_torrentNext (session, tor)))
if (!memcmp (tor->obfuscatedHash, obfuscatedTorrentHash,
SHA_DIGEST_LENGTH))
return tor;
return NULL;
}
bool
tr_torrentIsPieceTransferAllowed (const tr_torrent * tor,
tr_direction direction)
{
bool allowed = true;
unsigned int limit;
assert (tr_isTorrent (tor));
assert (tr_isDirection (direction));
if (tr_torrentUsesSpeedLimit (tor, direction))
if (tr_torrentGetSpeedLimit_Bps (tor, direction) <= 0)
allowed = false;
if (tr_torrentUsesSessionLimits (tor))
if (tr_sessionGetActiveSpeedLimit_Bps (tor->session, direction, &limit))
if (limit <= 0)
allowed = false;
return allowed;
}
/***
**** PER-TORRENT UL / DL SPEEDS
***/
void
tr_torrentSetSpeedLimit_Bps (tr_torrent * tor, tr_direction dir, unsigned int Bps)
{
assert (tr_isTorrent (tor));
assert (tr_isDirection (dir));
if (tr_bandwidthSetDesiredSpeed_Bps (&tor->bandwidth, dir, Bps))
tr_torrentSetDirty (tor);
}
void
tr_torrentSetSpeedLimit_KBps (tr_torrent * tor, tr_direction dir, unsigned int KBps)
{
tr_torrentSetSpeedLimit_Bps (tor, dir, toSpeedBytes (KBps));
}
unsigned int
tr_torrentGetSpeedLimit_Bps (const tr_torrent * tor, tr_direction dir)
{
assert (tr_isTorrent (tor));
assert (tr_isDirection (dir));
return tr_bandwidthGetDesiredSpeed_Bps (&tor->bandwidth, dir);
}
unsigned int
tr_torrentGetSpeedLimit_KBps (const tr_torrent * tor, tr_direction dir)
{
assert (tr_isTorrent (tor));
assert (tr_isDirection (dir));
return toSpeedKBps (tr_torrentGetSpeedLimit_Bps (tor, dir));
}
void
tr_torrentUseSpeedLimit (tr_torrent * tor, tr_direction dir, bool do_use)
{
assert (tr_isTorrent (tor));
assert (tr_isDirection (dir));
if (tr_bandwidthSetLimited (&tor->bandwidth, dir, do_use))
tr_torrentSetDirty (tor);
}
bool
tr_torrentUsesSpeedLimit (const tr_torrent * tor, tr_direction dir)
{
assert (tr_isTorrent (tor));
return tr_bandwidthIsLimited (&tor->bandwidth, dir);
}
void
tr_torrentUseSessionLimits (tr_torrent * tor, bool doUse)
{
bool changed;
assert (tr_isTorrent (tor));
changed = tr_bandwidthHonorParentLimits (&tor->bandwidth, TR_UP, doUse);
changed |= tr_bandwidthHonorParentLimits (&tor->bandwidth, TR_DOWN, doUse);
if (changed)
tr_torrentSetDirty (tor);
}
bool
tr_torrentUsesSessionLimits (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tr_bandwidthAreParentLimitsHonored (&tor->bandwidth, TR_UP);
}
/***
****
***/
void
tr_torrentSetRatioMode (tr_torrent * tor, tr_ratiolimit mode)
{
assert (tr_isTorrent (tor));
assert (mode==TR_RATIOLIMIT_GLOBAL || mode==TR_RATIOLIMIT_SINGLE || mode==TR_RATIOLIMIT_UNLIMITED);
if (mode != tor->ratioLimitMode)
{
tor->ratioLimitMode = mode;
tr_torrentSetDirty (tor);
}
}
tr_ratiolimit
tr_torrentGetRatioMode (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tor->ratioLimitMode;
}
void
tr_torrentSetRatioLimit (tr_torrent * tor, double desiredRatio)
{
assert (tr_isTorrent (tor));
if ((int)(desiredRatio*100.0) != (int)(tor->desiredRatio*100.0))
{
tor->desiredRatio = desiredRatio;
tr_torrentSetDirty (tor);
}
}
double
tr_torrentGetRatioLimit (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tor->desiredRatio;
}
bool
tr_torrentGetSeedRatio (const tr_torrent * tor, double * ratio)
{
bool isLimited;
assert (tr_isTorrent (tor));
switch (tr_torrentGetRatioMode (tor))
{
case TR_RATIOLIMIT_SINGLE:
isLimited = true;
if (ratio)
*ratio = tr_torrentGetRatioLimit (tor);
break;
case TR_RATIOLIMIT_GLOBAL:
isLimited = tr_sessionIsRatioLimited (tor->session);
if (isLimited && ratio)
*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 (const tr_torrent * tor,
uint64_t * setmeLeft,
uint64_t * setmeGoal)
{
double seedRatio;
bool seedRatioApplies = false;
assert (tr_isTorrent (tor));
if (tr_torrentGetSeedRatio (tor, &seedRatio))
{
const uint64_t u = tor->uploadedCur + tor->uploadedPrev;
const uint64_t d = tor->downloadedCur + tor->downloadedPrev;
const uint64_t baseline = d ? d : tr_cpSizeWhenDone (&tor->completion);
const uint64_t goal = baseline * seedRatio;
if (setmeLeft) *setmeLeft = goal > u ? goal - u : 0;
if (setmeGoal) *setmeGoal = goal;
seedRatioApplies = tr_torrentIsSeed (tor);
}
return seedRatioApplies;
}
static bool
tr_torrentIsSeedRatioDone (const tr_torrent * tor)
{
uint64_t bytesLeft;
return tr_torrentGetSeedRatioBytes (tor, &bytesLeft, NULL) && !bytesLeft;
}
/***
****
***/
void
tr_torrentSetIdleMode (tr_torrent * tor, tr_idlelimit mode)
{
assert (tr_isTorrent (tor));
assert (mode==TR_IDLELIMIT_GLOBAL || mode==TR_IDLELIMIT_SINGLE || mode==TR_IDLELIMIT_UNLIMITED);
if (mode != tor->idleLimitMode)
{
tor->idleLimitMode = mode;
tr_torrentSetDirty (tor);
}
}
tr_idlelimit
tr_torrentGetIdleMode (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tor->idleLimitMode;
}
void
tr_torrentSetIdleLimit (tr_torrent * tor, uint16_t idleMinutes)
{
assert (tr_isTorrent (tor));
if (idleMinutes > 0)
{
tor->idleLimitMinutes = idleMinutes;
tr_torrentSetDirty (tor);
}
}
uint16_t
tr_torrentGetIdleLimit (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tor->idleLimitMinutes;
}
bool
tr_torrentGetSeedIdle (const tr_torrent * tor, uint16_t * idleMinutes)
{
bool isLimited;
switch (tr_torrentGetIdleMode (tor))
{
case TR_IDLELIMIT_SINGLE:
isLimited = true;
if (idleMinutes)
*idleMinutes = tr_torrentGetIdleLimit (tor);
break;
case TR_IDLELIMIT_GLOBAL:
isLimited = tr_sessionIsIdleLimited (tor->session);
if (isLimited && idleMinutes)
*idleMinutes = tr_sessionGetIdleLimit (tor->session);
break;
default: /* TR_IDLELIMIT_UNLIMITED */
isLimited = false;
break;
}
return isLimited;
}
static bool
tr_torrentIsSeedIdleLimitDone (tr_torrent * tor)
{
uint16_t idleMinutes;
return tr_torrentGetSeedIdle (tor, &idleMinutes)
&& difftime (tr_time (), MAX (tor->startDate, tor->activityDate)) >= idleMinutes * 60u;
}
/***
****
***/
void
tr_torrentCheckSeedLimit (tr_torrent * tor)
{
assert (tr_isTorrent (tor));
if (!tor->isRunning || tor->isStopping || !tr_torrentIsSeed (tor))
return;
/* if we're seeding and reach our seed ratio limit, stop the torrent */
if (tr_torrentIsSeedRatioDone (tor))
{
tr_torinf (tor, "%s", "Seed ratio reached; pausing torrent");
tor->isStopping = true;
/* maybe notify the client */
if (tor->ratio_limit_hit_func != NULL)
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_torinf (tor, "%s", "Seeding idle limit reached; pausing torrent");
tor->isStopping = true;
tor->finishedSeedingByIdle = true;
/* maybe notify the client */
if (tor->idle_limit_hit_func != NULL)
tor->idle_limit_hit_func (tor, tor->idle_limit_hit_func_user_data);
}
}
/***
****
***/
void
tr_torrentSetLocalError (tr_torrent * tor, const char * fmt, ...)
{
va_list ap;
assert (tr_isTorrent (tor));
va_start (ap, fmt);
tor->error = TR_STAT_LOCAL_ERROR;
tor->errorTracker[0] = '\0';
evutil_vsnprintf (tor->errorString, sizeof (tor->errorString), fmt, ap);
va_end (ap);
tr_torerr (tor, "%s", tor->errorString);
if (tor->isRunning)
tor->isStopping = true;
}
static void
tr_torrentClearError (tr_torrent * tor)
{
tor->error = TR_STAT_OK;
tor->errorString[0] = '\0';
tor->errorTracker[0] = '\0';
}
static void
onTrackerResponse (tr_torrent * tor, const tr_tracker_event * event, void * unused UNUSED)
{
switch (event->messageType)
{
case TR_TRACKER_PEERS:
{
size_t i;
const int8_t seedProbability = event->seedProbability;
const bool allAreSeeds = seedProbability == 100;
if (allAreSeeds)
tr_tordbg (tor, "Got %zu seeds from tracker", event->pexCount);
else
tr_tordbg (tor, "Got %zu peers from tracker", event->pexCount);
for (i = 0; i < event->pexCount; ++i)
tr_peerMgrAddPex (tor, TR_PEER_FROM_TRACKER, &event->pex[i], seedProbability);
break;
}
case TR_TRACKER_WARNING:
tr_torerr (tor, _("Tracker warning: \"%s\""), event->text);
tor->error = TR_STAT_TRACKER_WARNING;
tr_strlcpy (tor->errorTracker, event->tracker, sizeof (tor->errorTracker));
tr_strlcpy (tor->errorString, event->text, sizeof (tor->errorString));
break;
case TR_TRACKER_ERROR:
tr_torerr (tor, _("Tracker error: \"%s\""), event->text);
tor->error = TR_STAT_TRACKER_ERROR;
tr_strlcpy (tor->errorTracker, event->tracker, sizeof (tor->errorTracker));
tr_strlcpy (tor->errorString, event->text, sizeof (tor->errorString));
break;
case TR_TRACKER_ERROR_CLEAR:
if (tor->error != TR_STAT_LOCAL_ERROR)
tr_torrentClearError (tor);
break;
}
}
/***
****
**** TORRENT INSTANTIATION
****
***/
static tr_piece_index_t
getBytePiece (const tr_info * info, uint64_t byteOffset)
{
tr_piece_index_t piece;
assert (info);
assert (info->pieceSize != 0);
piece = byteOffset / info->pieceSize;
/* handle 0-byte files at the end of a torrent */
if (byteOffset == info->totalSize)
piece = info->pieceCount - 1;
return piece;
}
static void
initFilePieces (tr_info * info,
tr_file_index_t fileIndex)
{
tr_file * file;
uint64_t firstByte, lastByte;
assert (info);
assert (fileIndex < info->fileCount);
file = &info->files[fileIndex];
firstByte = file->offset;
lastByte = firstByte + (file->length ? file->length - 1 : 0);
file->firstPiece = getBytePiece (info, firstByte);
file->lastPiece = getBytePiece (info, lastByte);
}
static int
pieceHasFile (tr_piece_index_t piece,
const tr_file * file)
{
return (file->firstPiece <= piece) && (piece <= file->lastPiece);
}
static tr_priority_t
calculatePiecePriority (const tr_torrent * tor,
tr_piece_index_t piece,
int fileHint)
{
tr_file_index_t i;
tr_priority_t priority = TR_PRI_LOW;
/* find the first file that has data in this piece */
if (fileHint >= 0) {
i = fileHint;
while (i > 0 && pieceHasFile (piece, &tor->info.files[i - 1]))
--i;
} else {
for (i = 0; i < tor->info.fileCount; ++i)
if (pieceHasFile (piece, &tor->info.files[i]))
break;
}
/* the piece's priority is the max of the priorities
* of all the files in that piece */
for (; i < tor->info.fileCount; ++i)
{
const tr_file * file = &tor->info.files[i];
if (!pieceHasFile (piece, file))
break;
priority = MAX (priority, file->priority);
/* when dealing with multimedia files, getting the first and
last pieces can sometimes allow you to preview it a bit
before it's fully downloaded... */
if (file->priority >= TR_PRI_NORMAL)
if (file->firstPiece == piece || file->lastPiece == piece)
priority = TR_PRI_HIGH;
}
return priority;
}
static void
tr_torrentInitFilePieces (tr_torrent * tor)
{
int * firstFiles;
tr_file_index_t f;
tr_piece_index_t p;
uint64_t offset = 0;
tr_info * inf = &tor->info;
/* assign the file offsets */
for (f=0; f<inf->fileCount; ++f) {
inf->files[f].offset = offset;
offset += inf->files[f].length;
initFilePieces (inf, f);
}
/* build the array of first-file hints to give calculatePiecePriority */
firstFiles = tr_new (int, inf->pieceCount);
for (p=f=0; p<inf->pieceCount; ++p) {
while (inf->files[f].lastPiece < p)
++f;
firstFiles[p] = f;
}
#if 0
/* test to confirm the first-file hints are correct */
for (p=0; p<inf->pieceCount; ++p) {
f = firstFiles[p];
assert (inf->files[f].firstPiece <= p);
assert (inf->files[f].lastPiece >= p);
if (f > 0)
assert (inf->files[f-1].lastPiece < p);
for (f=0; f<inf->fileCount; ++f)
if (pieceHasFile (p, &inf->files[f]))
break;
assert ((int)f == firstFiles[p]);
}
#endif
for (p=0; p<inf->pieceCount; ++p)
inf->pieces[p].priority = calculatePiecePriority (tor, p, firstFiles[p]);
tr_free (firstFiles);
}
static void torrentStart (tr_torrent * tor, bool bypass_queue);
/**
* Decide on a block size. Constraints:
* (1) most clients decline requests over 16 KiB
* (2) pieceSize must be a multiple of block size
*/
uint32_t
tr_getBlockSize (uint32_t pieceSize)
{
uint32_t b = pieceSize;
while (b > MAX_BLOCK_SIZE)
b /= 2u;
if (!b || (pieceSize % b)) /* not cleanly divisible */
return 0;
return b;
}
static void refreshCurrentDir (tr_torrent * tor);
static void
torrentInitFromInfo (tr_torrent * tor)
{
uint64_t t;
tr_info * info = &tor->info;
tor->blockSize = tr_getBlockSize (info->pieceSize);
if (info->pieceSize)
tor->lastPieceSize = (uint32_t)(info->totalSize % info->pieceSize);
if (!tor->lastPieceSize)
tor->lastPieceSize = info->pieceSize;
if (tor->blockSize)
tor->lastBlockSize = info->totalSize % tor->blockSize;
if (!tor->lastBlockSize)
tor->lastBlockSize = tor->blockSize;
tor->blockCount = tor->blockSize
? (info->totalSize + tor->blockSize - 1) / tor->blockSize
: 0;
tor->blockCountInPiece = tor->blockSize
? info->pieceSize / tor->blockSize
: 0;
tor->blockCountInLastPiece = tor->blockSize
? (tor->lastPieceSize + tor->blockSize - 1) / tor->blockSize
: 0;
/* check our work */
if (tor->blockSize != 0)
assert ((info->pieceSize % tor->blockSize) == 0);
t = info->pieceCount - 1;
t *= info->pieceSize;
t += tor->lastPieceSize;
assert (t == info->totalSize);
t = tor->blockCount - 1;
t *= tor->blockSize;
t += tor->lastBlockSize;
assert (t == info->totalSize);
t = info->pieceCount - 1;
t *= tor->blockCountInPiece;
t += tor->blockCountInLastPiece;
assert (t == (uint64_t)tor->blockCount);
tr_cpConstruct (&tor->completion, tor);
tr_torrentInitFilePieces (tor);
tor->completeness = tr_cpGetStatus (&tor->completion);
}
static void tr_torrentFireMetadataCompleted (tr_torrent * tor);
void
tr_torrentGotNewInfoDict (tr_torrent * tor)
{
torrentInitFromInfo (tor);
tr_peerMgrOnTorrentGotMetainfo (tor);
tr_torrentFireMetadataCompleted (tor);
}
static bool
hasAnyLocalData (const tr_torrent * tor)
{
tr_file_index_t i;
for (i=0; i<tor->info.fileCount; ++i)
if (tr_torrentFindFile2 (tor, i, NULL, NULL, NULL))
return true;
return false;
}
static bool
setLocalErrorIfFilesDisappeared (tr_torrent * tor)
{
const bool disappeared = (tr_cpHaveTotal (&tor->completion) > 0) && !hasAnyLocalData (tor);
if (disappeared)
{
tr_deeplog_tor (tor, "%s", "[LAZY] uh oh, the files disappeared");
tr_torrentSetLocalError (tor, "%s", _("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
torrentInit (tr_torrent * tor, const tr_ctor * ctor)
{
int doStart;
uint64_t loaded;
const char * dir;
bool isNewTorrent;
struct stat st;
static int nextUniqueId = 1;
tr_session * session = tr_ctorGetSession (ctor);
assert (session != NULL);
tr_sessionLock (session);
tor->session = session;
tor->uniqueId = nextUniqueId++;
tor->magicNumber = TORRENT_MAGIC_NUMBER;
tor->queuePosition = session->torrentCount;
tr_peerIdInit (tor->peer_id);
tr_sha1 (tor->obfuscatedHash, "req2", 4,
tor->info.hash, SHA_DIGEST_LENGTH,
NULL);
if (!tr_ctorGetDownloadDir (ctor, TR_FORCE, &dir) ||
!tr_ctorGetDownloadDir (ctor, TR_FALLBACK, &dir))
tor->downloadDir = tr_strdup (dir);
if (tr_ctorGetIncompleteDir (ctor, &dir))
dir = tr_sessionGetIncompleteDir (session);
if (tr_sessionIsIncompleteDirEnabled (session))
tor->incompleteDir = tr_strdup (dir);
tr_bandwidthConstruct (&tor->bandwidth, session, &session->bandwidth);
tor->bandwidth.priority = tr_ctorGetBandwidthPriority (ctor);
tor->error = TR_STAT_OK;
tor->finishedSeedingByIdle = false;
tr_peerMgrAddTorrent (session->peerMgr, tor);
assert (!tor->downloadedCur);
assert (!tor->uploadedCur);
tr_torrentSetAddedDate (tor, tr_time ()); /* this is a default value to be
overwritten by the resume file */
torrentInitFromInfo (tor);
loaded = tr_torrentLoadResume (tor, ~0, ctor);
tor->completeness = tr_cpGetStatus (&tor->completion);
setLocalErrorIfFilesDisappeared (tor);
tr_ctorInitTorrentPriorities (ctor, tor);
tr_ctorInitTorrentWanted (ctor, tor);
refreshCurrentDir (tor);
doStart = tor->isRunning;
tor->isRunning = 0;
if (! (loaded & TR_FR_SPEEDLIMIT))
{
tr_torrentUseSpeedLimit (tor, TR_UP, false);
tr_torrentSetSpeedLimit_Bps (tor, TR_UP, tr_sessionGetSpeedLimit_Bps (tor->session, TR_UP));
tr_torrentUseSpeedLimit (tor, TR_DOWN, false);
tr_torrentSetSpeedLimit_Bps (tor, TR_DOWN, tr_sessionGetSpeedLimit_Bps (tor->session, TR_DOWN));
tr_torrentUseSessionLimits (tor, true);
}
if (! (loaded & TR_FR_RATIOLIMIT))
{
tr_torrentSetRatioMode (tor, TR_RATIOLIMIT_GLOBAL);
tr_torrentSetRatioLimit (tor, tr_sessionGetRatioLimit (tor->session));
}
if (! (loaded & TR_FR_IDLELIMIT))
{
tr_torrentSetIdleMode (tor, TR_IDLELIMIT_GLOBAL);
tr_torrentSetIdleLimit (tor, tr_sessionGetIdleLimit (tor->session));
}
/* add the torrent to tr_session.torrentList */
session->torrentCount++;
if (session->torrentList == NULL)
session->torrentList = tor;
else {
tr_torrent * it = session->torrentList;
while (it->next != NULL)
it = it->next;
it->next = tor;
}
/* if we don't have a local .torrent file already, assume the torrent is new */
isNewTorrent = stat (tor->info.torrent, &st);
/* maybe save our own copy of the metainfo */
if (tr_ctorGetSave (ctor))
{
const tr_variant * val;
if (!tr_ctorGetMetainfo (ctor, &val))
{
const char * path = tor->info.torrent;
const int err = tr_variantToFile (val, TR_VARIANT_FMT_BENC, path);
if (err)
tr_torrentSetLocalError (tor, "Unable to save torrent file: %s", tr_strerror (err));
tr_sessionSetTorrentFile (tor->session, tor->info.hashString, path);
}
}
tor->tiers = tr_announcerAddTorrent (tor, onTrackerResponse, NULL);
if (isNewTorrent)
{
tor->startAfterVerify = doStart;
tr_torrentVerify (tor);
}
else if (doStart)
{
tr_torrentStart (tor);
}
tr_sessionUnlock (session);
}
static tr_parse_result
torrentParseImpl (const tr_ctor * ctor, tr_info * setmeInfo,
bool * setmeHasInfo, int * dictLength)
{
int doFree;
bool didParse;
bool hasInfo = false;
tr_info tmp;
const tr_variant * metainfo;
tr_session * session = tr_ctorGetSession (ctor);
tr_parse_result result = TR_PARSE_OK;
if (setmeInfo == NULL)
setmeInfo = &tmp;
memset (setmeInfo, 0, sizeof (tr_info));
if (tr_ctorGetMetainfo (ctor, &metainfo))
return TR_PARSE_ERR;
didParse = tr_metainfoParse (session, metainfo, setmeInfo,
&hasInfo, dictLength);
doFree = didParse && (setmeInfo == &tmp);
if (!didParse)
result = TR_PARSE_ERR;
if (didParse && hasInfo && !tr_getBlockSize (setmeInfo->pieceSize))
result = TR_PARSE_ERR;
if (didParse && session && tr_torrentExists (session, setmeInfo->hash))
result = TR_PARSE_DUPLICATE;
if (doFree)
tr_metainfoFree (setmeInfo);
if (setmeHasInfo != NULL)
*setmeHasInfo = hasInfo;
return result;
}
tr_parse_result
tr_torrentParse (const tr_ctor * ctor, tr_info * setmeInfo)
{
return torrentParseImpl (ctor, setmeInfo, NULL, NULL);
}
tr_torrent *
tr_torrentNew (const tr_ctor * ctor, int * setmeError)
{
int len;
bool hasInfo;
tr_info tmpInfo;
tr_parse_result r;
tr_torrent * tor = NULL;
assert (ctor != NULL);
assert (tr_isSession (tr_ctorGetSession (ctor)));
r = torrentParseImpl (ctor, &tmpInfo, &hasInfo, &len);
if (r == TR_PARSE_OK)
{
tor = tr_new0 (tr_torrent, 1);
tor->info = tmpInfo;
if (hasInfo)
tor->infoDictLength = len;
torrentInit (tor, ctor);
}
else
{
if (r == TR_PARSE_DUPLICATE)
tr_metainfoFree (&tmpInfo);
if (setmeError)
*setmeError = r;
}
return tor;
}
/**
***
**/
void
tr_torrentSetDownloadDir (tr_torrent * tor, const char * path)
{
assert (tr_isTorrent (tor));
if (!path || !tor->downloadDir || strcmp (path, tor->downloadDir))
{
tr_free (tor->downloadDir);
tor->downloadDir = tr_strdup (path);
tr_torrentSetDirty (tor);
}
refreshCurrentDir (tor);
}
const char*
tr_torrentGetDownloadDir (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tor->downloadDir;
}
const char *
tr_torrentGetCurrentDir (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tor->currentDir;
}
void
tr_torrentChangeMyPort (tr_torrent * tor)
{
assert (tr_isTorrent (tor));
if (tor->isRunning)
tr_announcerChangeMyPort (tor);
}
static inline void
tr_torrentManualUpdateImpl (void * vtor)
{
tr_torrent * tor = vtor;
assert (tr_isTorrent (tor));
if (tor->isRunning)
tr_announcerManualAnnounce (tor);
}
void
tr_torrentManualUpdate (tr_torrent * tor)
{
assert (tr_isTorrent (tor));
tr_runInEventThread (tor->session, tr_torrentManualUpdateImpl, tor);
}
bool
tr_torrentCanManualUpdate (const tr_torrent * tor)
{
return (tr_isTorrent (tor))
&& (tor->isRunning)
&& (tr_announcerCanManualAnnounce (tor));
}
const tr_info *
tr_torrentInfo (const tr_torrent * tor)
{
return tr_isTorrent (tor) ? &tor->info : NULL;
}
const tr_stat *
tr_torrentStatCached (tr_torrent * tor)
{
const time_t now = tr_time ();
return tr_isTorrent (tor) && (now == tor->lastStatTime)
? &tor->stats
: tr_torrentStat (tor);
}
void
tr_torrentSetVerifyState (tr_torrent * tor, tr_verify_state state)
{
assert (tr_isTorrent (tor));
assert (state==TR_VERIFY_NONE || state==TR_VERIFY_WAIT || state==TR_VERIFY_NOW);
tor->verifyState = state;
tor->anyDate = tr_time ();
}
tr_torrent_activity
tr_torrentGetActivity (const tr_torrent * tor)
{
tr_torrent_activity ret = TR_STATUS_STOPPED;
const bool is_seed = tr_torrentIsSeed (tor);
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 (tr_torrentIsQueued (tor))
{
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 time_t
torrentGetIdleSecs (const tr_torrent * tor)
{
int idle_secs;
const tr_torrent_activity activity = tr_torrentGetActivity (tor);
if ((activity == TR_STATUS_DOWNLOAD || activity == TR_STATUS_SEED) && tor->startDate != 0)
idle_secs = difftime (tr_time (), MAX (tor->startDate, tor->activityDate));
else
idle_secs = -1;
return idle_secs;
}
bool
tr_torrentIsStalled (const tr_torrent * tor)
{
return tr_sessionGetQueueStalledEnabled (tor->session)
&& (torrentGetIdleSecs (tor) > (tr_sessionGetQueueStalledMinutes (tor->session) * 60));
}
static double
getVerifyProgress (const tr_torrent * tor)
{
double d = 0;
if (tr_torrentHasMetadata (tor))
{
tr_piece_index_t i, n;
tr_piece_index_t checked = 0;
for (i=0, n=tor->info.pieceCount; i!=n; ++i)
if (tor->info.pieces[i].timeChecked)
++checked;
d = checked / (double)tor->info.pieceCount;
}
return d;
}
const tr_stat *
tr_torrentStat (tr_torrent * tor)
{
tr_stat * s;
uint64_t seedRatioBytesLeft;
uint64_t seedRatioBytesGoal;
bool seedRatioApplies;
uint16_t seedIdleMinutes;
const uint64_t now = tr_time_msec ();
assert (tr_isTorrent (tor));
tor->lastStatTime = tr_time ();
s = &tor->stats;
s->id = tor->uniqueId;
s->activity = tr_torrentGetActivity (tor);
s->error = tor->error;
s->queuePosition = tor->queuePosition;
s->isStalled = tr_torrentIsStalled (tor);
tr_strlcpy (s->errorString, tor->errorString, sizeof (s->errorString));
s->manualAnnounceTime = tr_announcerNextManualAnnounce (tor);
tr_peerMgrTorrentStats (tor,
&s->peersConnected,
&s->webseedsSendingToUs,
&s->peersSendingToUs,
&s->peersGettingFromUs,
s->peersFrom);
s->rawUploadSpeed_KBps = toSpeedKBps (tr_bandwidthGetRawSpeed_Bps (&tor->bandwidth, now, TR_UP));
s->pieceUploadSpeed_KBps = toSpeedKBps (tr_bandwidthGetPieceSpeed_Bps (&tor->bandwidth, now, TR_UP));
s->rawDownloadSpeed_KBps = toSpeedKBps (tr_bandwidthGetRawSpeed_Bps (&tor->bandwidth, now, TR_DOWN));
s->pieceDownloadSpeed_KBps = toSpeedKBps (tr_bandwidthGetPieceSpeed_Bps (&tor->bandwidth, now, TR_DOWN));
s->percentComplete = tr_cpPercentComplete (&tor->completion);
s->metadataPercentComplete = tr_torrentGetMetadataPercent (tor);
s->percentDone = tr_cpPercentDone (&tor->completion);
s->leftUntilDone = tr_cpLeftUntilDone (&tor->completion);
s->sizeWhenDone = tr_cpSizeWhenDone (&tor->completion);
s->recheckProgress = s->activity == TR_STATUS_CHECK ? getVerifyProgress (tor) : 0;
s->activityDate = tor->activityDate;
s->addedDate = tor->addedDate;
s->doneDate = tor->doneDate;
s->startDate = tor->startDate;
s->secondsSeeding = tor->secondsSeeding;
s->secondsDownloading = tor->secondsDownloading;
s->idleSecs = torrentGetIdleSecs (tor);
s->corruptEver = tor->corruptCur + tor->corruptPrev;
s->downloadedEver = tor->downloadedCur + tor->downloadedPrev;
s->uploadedEver = tor->uploadedCur + tor->uploadedPrev;
s->haveValid = tr_cpHaveValid (&tor->completion);
s->haveUnchecked = tr_cpHaveTotal (&tor->completion) - s->haveValid;
s->desiredAvailable = tr_peerMgrGetDesiredAvailable (tor);
s->ratio = tr_getRatio (s->uploadedEver,
s->downloadedEver ? s->downloadedEver : s->haveValid);
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_KBps = ((tor->etaDLSpeedCalculatedAt + 4000) < now)
? s->pieceDownloadSpeed_KBps /* if no recent previous speed, no need to smooth */
: ((tor->etaDLSpeed_KBps*4.0) + s->pieceDownloadSpeed_KBps)/5.0; /* smooth across 5 readings */
tor->etaDLSpeedCalculatedAt = now;
}
if ((s->leftUntilDone > s->desiredAvailable) && (tor->info.webseedCount < 0))
s->eta = TR_ETA_NOT_AVAIL;
else if (tor->etaDLSpeed_KBps < 1)
s->eta = TR_ETA_UNKNOWN;
else
s->eta = s->leftUntilDone / toSpeedBytes (tor->etaDLSpeed_KBps);
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_KBps = ((tor->etaULSpeedCalculatedAt + 4000) < now)
? s->pieceUploadSpeed_KBps /* if no recent previous speed, no need to smooth */
: ((tor->etaULSpeed_KBps*4.0) + s->pieceUploadSpeed_KBps)/5.0; /* smooth across 5 readings */
tor->etaULSpeedCalculatedAt = now;
}
if (tor->etaULSpeed_KBps < 1)
s->eta = TR_ETA_UNKNOWN;
else
s->eta = seedRatioBytesLeft / toSpeedBytes (tor->etaULSpeed_KBps);
}
if (tor->etaULSpeed_KBps < 1 && tr_torrentGetSeedIdle (tor, &seedIdleMinutes))
s->etaIdle = seedIdleMinutes * 60 - s->idleSecs;
else
s->etaIdle = 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 && s->haveValid);
if (!seedRatioApplies || s->finished)
s->seedRatioPercentDone = 1;
else if (!seedRatioBytesGoal) /* impossible? safeguard for div by zero */
s->seedRatioPercentDone = 0;
else
s->seedRatioPercentDone = (double)(seedRatioBytesGoal - seedRatioBytesLeft) / seedRatioBytesGoal;
/* test some of the constraints */
assert (s->sizeWhenDone <= tor->info.totalSize);
assert (s->leftUntilDone <= s->sizeWhenDone);
assert (s->desiredAvailable <= s->leftUntilDone);
return s;
}
/***
****
***/
static uint64_t
fileBytesCompleted (const tr_torrent * tor, tr_file_index_t index)
{
uint64_t total = 0;
const tr_file * f = &tor->info.files[index];
if (f->length)
{
tr_block_index_t first;
tr_block_index_t last;
tr_torGetFileBlockRange (tor, index, &first, &last);
if (first == last)
{
if (tr_cpBlockIsComplete (&tor->completion, first))
total = f->length;
}
else
{
/* the first block */
if (tr_cpBlockIsComplete (&tor->completion, first))
total += tor->blockSize - (f->offset % tor->blockSize);
/* the middle blocks */
if (first + 1 < last) {
uint64_t u = tr_bitfieldCountRange (&tor->completion.blockBitfield, first+1, last);
u *= tor->blockSize;
total += u;
}
/* the last block */
if (tr_cpBlockIsComplete (&tor->completion, last))
total += (f->offset + f->length) - ((uint64_t)tor->blockSize * last);
}
}
return total;
}
tr_file_stat *
tr_torrentFiles (const tr_torrent * tor,
tr_file_index_t * fileCount)
{
tr_file_index_t i;
const tr_file_index_t n = tor->info.fileCount;
tr_file_stat * files = tr_new0 (tr_file_stat, n);
tr_file_stat * walk = files;
const bool isSeed = tor->completeness == TR_SEED;
assert (tr_isTorrent (tor));
for (i=0; i<n; ++i, ++walk) {
const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted (tor, i);
walk->bytesCompleted = b;
walk->progress = tor->info.files[i].length > 0 ? ((float)b / tor->info.files[i].length) : 1.0f;
}
if (fileCount)
*fileCount = n;
return files;
}
void
tr_torrentFilesFree (tr_file_stat * files,
tr_file_index_t fileCount UNUSED)
{
tr_free (files);
}
/***
****
***/
double*
tr_torrentWebSpeeds_KBps (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tr_peerMgrWebSpeeds_KBps (tor);
}
tr_peer_stat *
tr_torrentPeers (const tr_torrent * tor, int * peerCount)
{
assert (tr_isTorrent (tor));
return tr_peerMgrPeerStats (tor, peerCount);
}
void
tr_torrentPeersFree (tr_peer_stat * peers, int peerCount UNUSED)
{
tr_free (peers);
}
tr_tracker_stat *
tr_torrentTrackers (const tr_torrent * tor, int * setmeTrackerCount)
{
assert (tr_isTorrent (tor));
return tr_announcerStats (tor, setmeTrackerCount);
}
void
tr_torrentTrackersFree (tr_tracker_stat * trackers, int trackerCount)
{
tr_announcerStatsFree (trackers, trackerCount);
}
void
tr_torrentAvailability (const tr_torrent * tor, int8_t * tab, int size)
{
assert (tr_isTorrent (tor));
if ((tab != NULL) && (size > 0))
tr_peerMgrTorrentAvailability (tor, tab, size);
}
void
tr_torrentAmountFinished (const tr_torrent * tor, float * tab, int size)
{
tr_cpGetAmountDone (&tor->completion, tab, size);
}
static void
tr_torrentResetTransferStats (tr_torrent * tor)
{
tr_torrentLock (tor);
tor->downloadedPrev += tor->downloadedCur;
tor->downloadedCur = 0;
tor->uploadedPrev += tor->uploadedCur;
tor->uploadedCur = 0;
tor->corruptPrev += tor->corruptCur;
tor->corruptCur = 0;
tr_torrentSetDirty (tor);
tr_torrentUnlock (tor);
}
void
tr_torrentSetHasPiece (tr_torrent * tor,
tr_piece_index_t pieceIndex,
bool has)
{
assert (tr_isTorrent (tor));
assert (pieceIndex < tor->info.pieceCount);
if (has)
tr_cpPieceAdd (&tor->completion, pieceIndex);
else
tr_cpPieceRem (&tor->completion, pieceIndex);
}
/***
****
***/
#ifndef NDEBUG
static bool queueIsSequenced (tr_session *);
#endif
static void
freeTorrent (tr_torrent * tor)
{
tr_torrent * t;
tr_session * session = tor->session;
tr_info * inf = &tor->info;
const time_t now = tr_time ();
assert (!tor->isRunning);
tr_sessionLock (session);
tr_peerMgrRemoveTorrent (tor);
tr_announcerRemoveTorrent (session->announcer, tor);
tr_cpDestruct (&tor->completion);
tr_free (tor->downloadDir);
tr_free (tor->incompleteDir);
if (tor == session->torrentList)
session->torrentList = tor->next;
else for (t = session->torrentList; t != NULL; t = t->next) {
if (t->next == tor) {
t->next = tor->next;
break;
}
}
/* decrement the torrent count */
assert (session->torrentCount >= 1);
session->torrentCount--;
/* resequence the queue positions */
t = NULL;
while ((t = tr_torrentNext (session, t))) {
if (t->queuePosition > tor->queuePosition) {
t->queuePosition--;
t->anyDate = now;
}
}
assert (queueIsSequenced (session));
tr_bandwidthDestruct (&tor->bandwidth);
tr_metainfoFree (inf);
memset (tor, ~0, sizeof (tr_torrent));
tr_free (tor);
tr_sessionUnlock (session);
}
/**
*** Start/Stop Callback
**/
static void torrentSetQueued (tr_torrent * tor, bool queued);
static void
torrentStartImpl (void * vtor)
{
time_t now;
tr_torrent * tor = vtor;
assert (tr_isTorrent (tor));
tr_sessionLock (tor->session);
tr_torrentRecheckCompleteness (tor);
torrentSetQueued (tor, false);
now = tr_time ();
tor->isRunning = true;
tor->completeness = tr_cpGetStatus (&tor->completion);
tor->startDate = tor->anyDate = now;
tr_torrentClearError (tor);
tor->finishedSeedingByIdle = false;
tr_torrentResetTransferStats (tor);
tr_announcerTorrentStarted (tor);
tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt (20);
tor->dhtAnnounce6At = now + tr_cryptoWeakRandInt (20);
tor->lpdAnnounceAt = now;
tr_peerMgrStartTorrent (tor);
tr_sessionUnlock (tor->session);
}
uint64_t
tr_torrentGetCurrentSizeOnDisk (const tr_torrent * tor)
{
tr_file_index_t i;
uint64_t byte_count = 0;
const tr_file_index_t n = tor->info.fileCount;
for (i=0; i<n; ++i)
{
struct stat sb;
char * filename = tr_torrentFindFile (tor, i);
sb.st_size = 0;
if (filename && !stat (filename, &sb))
byte_count += sb.st_size;
tr_free (filename);
}
return byte_count;
}
static bool
torrentShouldQueue (const tr_torrent * tor)
{
const tr_direction dir = tr_torrentGetQueueDirection (tor);
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 */
break;
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;
break;
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... */
tr_sessionLock (tor->session);
/* allow finished torrents to be resumed */
if (tr_torrentIsSeedRatioDone (tor)) {
tr_torinf (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_peerIdInit (tor->peer_id);
tor->isRunning = 1;
tr_torrentSetDirty (tor);
tr_runInEventThread (tor->session, torrentStartImpl, tor);
tr_sessionUnlock (tor->session);
}
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);
}
static void
torrentRecheckDoneImpl (void * vtor)
{
tr_torrent * tor = vtor;
assert (tr_isTorrent (tor));
tr_torrentRecheckCompleteness (tor);
if (tor->startAfterVerify) {
tor->startAfterVerify = false;
torrentStart (tor, false);
}
}
static void
torrentRecheckDoneCB (tr_torrent * tor)
{
assert (tr_isTorrent (tor));
tr_runInEventThread (tor->session, torrentRecheckDoneImpl, tor);
}
static void
verifyTorrent (void * vtor)
{
bool startAfter;
tr_torrent * tor = vtor;
tr_sessionLock (tor->session);
/* if the torrent's already being verified, stop it */
tr_verifyRemove (tor);
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, torrentRecheckDoneCB);
tr_sessionUnlock (tor->session);
}
void
tr_torrentVerify (tr_torrent * tor)
{
if (tr_isTorrent (tor))
tr_runInEventThread (tor->session, verifyTorrent, tor);
}
void
tr_torrentSave (tr_torrent * tor)
{
assert (tr_isTorrent (tor));
if (tor->isDirty)
{
tor->isDirty = false;
tr_torrentSaveResume (tor);
}
}
static void
stopTorrent (void * vtor)
{
tr_torrent * tor = vtor;
tr_torinf (tor, "%s", "Pausing");
assert (tr_isTorrent (tor));
tr_torrentLock (tor);
tr_verifyRemove (tor);
torrentSetQueued (tor, false);
tr_peerMgrStopTorrent (tor);
tr_announcerTorrentStopped (tor);
tr_cacheFlushTorrent (tor->session->cache, tor);
tr_fdTorrentClose (tor->session, tor->uniqueId);
if (!tor->isDeleting)
tr_torrentSave (tor);
tr_torrentUnlock (tor);
}
void
tr_torrentStop (tr_torrent * tor)
{
assert (tr_isTorrent (tor));
if (tr_isTorrent (tor))
{
tr_sessionLock (tor->session);
tor->isRunning = 0;
tor->isStopping = 0;
tr_torrentSetDirty (tor);
tr_runInEventThread (tor->session, stopTorrent, tor);
tr_sessionUnlock (tor->session);
}
}
static void
closeTorrent (void * vtor)
{
tr_variant * d;
tr_torrent * tor = vtor;
assert (tr_isTorrent (tor));
d = tr_variantListAddDict (&tor->session->removedTorrents, 2);
tr_variantDictAddInt (d, TR_KEY_id, tor->uniqueId);
tr_variantDictAddInt (d, TR_KEY_date, tr_time ());
tr_torinf (tor, "%s", _("Removing torrent"));
stopTorrent (tor);
if (tor->isDeleting)
{
tr_metainfoRemoveSaved (tor->session, &tor->info);
tr_torrentRemoveResume (tor);
}
tor->isRunning = 0;
freeTorrent (tor);
}
void
tr_torrentFree (tr_torrent * tor)
{
if (tr_isTorrent (tor))
{
tr_session * session = tor->session;
assert (tr_isSession (session));
tr_sessionLock (session);
tr_torrentClearCompletenessCallback (tor);
tr_runInEventThread (session, closeTorrent, tor);
tr_sessionUnlock (session);
}
}
struct remove_data
{
tr_torrent * tor;
bool deleteFlag;
tr_fileFunc * deleteFunc;
};
static void tr_torrentDeleteLocalData (tr_torrent *, tr_fileFunc);
static void
removeTorrent (void * vdata)
{
struct remove_data * data = vdata;
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)
{
struct remove_data * data;
assert (tr_isTorrent (tor));
tor->isDeleting = 1;
data = tr_new0 (struct remove_data, 1);
data->tor = tor;
data->deleteFlag = deleteFlag;
data->deleteFunc = deleteFunc;
tr_runInEventThread (tor->session, removeTorrent, data);
}
/**
*** Completeness
**/
static const char *
getCompletionString (int type)
{
switch (type)
{
/* 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 */
case TR_PARTIAL_SEED:
return _("Done");
case TR_SEED:
return _("Complete");
default:
return _("Incomplete");
}
}
static void
fireCompletenessChange (tr_torrent * tor,
tr_completeness status,
bool wasRunning)
{
assert ((status == TR_LEECH)
|| (status == TR_SEED)
|| (status == TR_PARTIAL_SEED));
if (tor->completeness_func)
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)
{
assert (tr_isTorrent (tor));
tor->completeness_func = func;
tor->completeness_func_user_data = user_data;
}
void
tr_torrentClearCompletenessCallback (tr_torrent * torrent)
{
tr_torrentSetCompletenessCallback (torrent, NULL, NULL);
}
void
tr_torrentSetRatioLimitHitCallback (tr_torrent * tor,
tr_torrent_ratio_limit_hit_func func,
void * user_data)
{
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, NULL, NULL);
}
void
tr_torrentSetIdleLimitHitCallback (tr_torrent * tor,
tr_torrent_idle_limit_hit_func func,
void * user_data)
{
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, NULL, NULL);
}
static void
onSigCHLD (int i UNUSED)
{
waitpid (-1, NULL, WNOHANG);
}
static void
torrentCallScript (const tr_torrent * tor, const char * script)
{
char timeStr[128];
const time_t now = tr_time ();
tr_strlcpy (timeStr, ctime (&now), sizeof (timeStr));
*strchr (timeStr,'\n') = '\0';
if (script && *script)
{
int i;
char * cmd[] = { tr_strdup (script), NULL };
char * env[] = {
tr_strdup_printf ("TR_APP_VERSION=%s", SHORT_VERSION_STRING),
tr_strdup_printf ("TR_TIME_LOCALTIME=%s", timeStr),
tr_strdup_printf ("TR_TORRENT_DIR=%s", tor->currentDir),
tr_strdup_printf ("TR_TORRENT_ID=%d", tr_torrentId (tor)),
tr_strdup_printf ("TR_TORRENT_HASH=%s", tor->info.hashString),
tr_strdup_printf ("TR_TORRENT_NAME=%s", tr_torrentName (tor)),
NULL };
tr_torinf (tor, "Calling script \"%s\"", script);
#ifdef WIN32
_spawnvpe (_P_NOWAIT, script, (const char*)cmd, env);
#else
signal (SIGCHLD, onSigCHLD);
if (!fork ())
{
for (i=0; env[i]; ++i)
putenv (env[i]);
execvp (script, cmd);
_exit (0);
}
#endif
for (i=0; cmd[i]; ++i) tr_free (cmd[i]);
for (i=0; env[i]; ++i) tr_free (env[i]);
}
}
void
tr_torrentRecheckCompleteness (tr_torrent * tor)
{
tr_completeness completeness;
tr_torrentLock (tor);
completeness = tr_cpGetStatus (&tor->completion);
if (completeness != tor->completeness)
{
const int recentChange = tor->downloadedCur != 0;
const bool wasLeeching = !tr_torrentIsSeed (tor);
const bool wasRunning = tor->isRunning;
if (recentChange)
tr_torinf (tor, _("State changed from \"%1$s\" to \"%2$s\""),
getCompletionString (tor->completeness),
getCompletionString (completeness));
tor->completeness = completeness;
tr_fdTorrentClose (tor->session, tor->uniqueId);
fireCompletenessChange (tor, completeness, wasRunning);
if (tr_torrentIsSeed (tor))
{
if (recentChange)
{
tr_announcerTorrentCompleted (tor);
tor->doneDate = tor->anyDate = tr_time ();
}
if (wasLeeching && wasRunning)
{
/* clear interested flag on all peers */
tr_peerMgrClearInterest (tor);
/* if completeness was TR_LEECH then the seed limit check will have been skipped in bandwidthPulse */
tr_torrentCheckSeedLimit (tor);
}
if (tor->currentDir == tor->incompleteDir)
tr_torrentSetLocation (tor, tor->downloadDir, true, NULL, NULL);
if (tr_sessionIsTorrentDoneScriptEnabled (tor->session))
torrentCallScript (tor, tr_sessionGetTorrentDoneScript (tor->session));
}
tr_torrentSetDirty (tor);
}
tr_torrentUnlock (tor);
}
/***
****
***/
static void
tr_torrentFireMetadataCompleted (tr_torrent * tor)
{
assert (tr_isTorrent (tor));
if (tor->metadata_func)
tor->metadata_func (tor, tor->metadata_func_user_data);
}
void
tr_torrentSetMetadataCallback (tr_torrent * tor,
tr_torrent_metadata_func func,
void * user_data)
{
assert (tr_isTorrent (tor));
tor->metadata_func = func;
tor->metadata_func_user_data = user_data;
}
/**
*** File priorities
**/
void
tr_torrentInitFilePriority (tr_torrent * tor,
tr_file_index_t fileIndex,
tr_priority_t priority)
{
tr_piece_index_t i;
tr_file * file;
assert (tr_isTorrent (tor));
assert (fileIndex < tor->info.fileCount);
assert (tr_isPriority (priority));
file = &tor->info.files[fileIndex];
file->priority = priority;
for (i = file->firstPiece; i <= file->lastPiece; ++i)
tor->info.pieces[i].priority = calculatePiecePriority (tor, i, fileIndex);
}
void
tr_torrentSetFilePriorities (tr_torrent * tor,
const tr_file_index_t * files,
tr_file_index_t fileCount,
tr_priority_t priority)
{
tr_file_index_t i;
assert (tr_isTorrent (tor));
tr_torrentLock (tor);
for (i = 0; i < fileCount; ++i)
if (files[i] < tor->info.fileCount)
tr_torrentInitFilePriority (tor, files[i], priority);
tr_torrentSetDirty (tor);
tr_peerMgrRebuildRequests (tor);
tr_torrentUnlock (tor);
}
tr_priority_t*
tr_torrentGetFilePriorities (const tr_torrent * tor)
{
tr_file_index_t i;
tr_priority_t * p;
assert (tr_isTorrent (tor));
p = tr_new0 (tr_priority_t, tor->info.fileCount);
for (i=0; i<tor->info.fileCount; ++i)
p[i] = tor->info.files[i].priority;
return p;
}
/**
*** File DND
**/
static void
setFileDND (tr_torrent * tor, tr_file_index_t fileIndex, int doDownload)
{
const int8_t dnd = !doDownload;
tr_piece_index_t firstPiece;
int8_t firstPieceDND;
tr_piece_index_t lastPiece;
int8_t lastPieceDND;
tr_file_index_t i;
tr_file * file = &tor->info.files[fileIndex];
file->dnd = dnd;
firstPiece = file->firstPiece;
lastPiece = file->lastPiece;
/* can't set the first piece to DND unless
every file using that piece is DND */
firstPieceDND = dnd;
if (fileIndex > 0)
{
for (i = fileIndex - 1; firstPieceDND; --i)
{
if (tor->info.files[i].lastPiece != firstPiece)
break;
firstPieceDND = tor->info.files[i].dnd;
if (!i)
break;
}
}
/* can't set the last piece to DND unless
every file using that piece is DND */
lastPieceDND = dnd;
for (i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i)
{
if (tor->info.files[i].firstPiece != lastPiece)
break;
lastPieceDND = tor->info.files[i].dnd;
}
if (firstPiece == lastPiece)
{
tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
}
else
{
tr_piece_index_t pp;
tor->info.pieces[firstPiece].dnd = firstPieceDND;
tor->info.pieces[lastPiece].dnd = lastPieceDND;
for (pp = firstPiece + 1; pp < lastPiece; ++pp)
tor->info.pieces[pp].dnd = dnd;
}
}
void
tr_torrentInitFileDLs (tr_torrent * tor,
const tr_file_index_t * files,
tr_file_index_t fileCount,
bool doDownload)
{
tr_file_index_t i;
assert (tr_isTorrent (tor));
tr_torrentLock (tor);
for (i=0; i<fileCount; ++i)
if (files[i] < tor->info.fileCount)
setFileDND (tor, files[i], doDownload);
tr_cpInvalidateDND (&tor->completion);
tr_torrentUnlock (tor);
}
void
tr_torrentSetFileDLs (tr_torrent * tor,
const tr_file_index_t * files,
tr_file_index_t fileCount,
bool doDownload)
{
assert (tr_isTorrent (tor));
tr_torrentLock (tor);
tr_torrentInitFileDLs (tor, files, fileCount, doDownload);
tr_torrentSetDirty (tor);
tr_torrentRecheckCompleteness (tor);
tr_peerMgrRebuildRequests (tor);
tr_torrentUnlock (tor);
}
/***
****
***/
tr_priority_t
tr_torrentGetPriority (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tor->bandwidth.priority;
}
void
tr_torrentSetPriority (tr_torrent * tor, tr_priority_t priority)
{
assert (tr_isTorrent (tor));
assert (tr_isPriority (priority));
if (tor->bandwidth.priority != priority)
{
tor->bandwidth.priority = priority;
tr_torrentSetDirty (tor);
}
}
/***
****
***/
void
tr_torrentSetPeerLimit (tr_torrent * tor,
uint16_t maxConnectedPeers)
{
assert (tr_isTorrent (tor));
if (tor->maxConnectedPeers != maxConnectedPeers)
{
tor->maxConnectedPeers = maxConnectedPeers;
tr_torrentSetDirty (tor);
}
}
uint16_t
tr_torrentGetPeerLimit (const tr_torrent * tor)
{
assert (tr_isTorrent (tor));
return tor->maxConnectedPeers;
}
/***
****
***/
void
tr_torrentGetBlockLocation (const tr_torrent * 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->info.pieceSize;
*offset = pos - (*piece * tor->info.pieceSize);
*length = tr_torBlockCountBytes (tor, block);
}
tr_block_index_t
_tr_block (const tr_torrent * tor,
tr_piece_index_t index,
uint32_t offset)
{
tr_block_index_t ret;
assert (tr_isTorrent (tor));
ret = index;
ret *= (tor->info.pieceSize / tor->blockSize);
ret += offset / tor->blockSize;
return ret;
}
bool
tr_torrentReqIsValid (const tr_torrent * tor,
tr_piece_index_t index,
uint32_t offset,
uint32_t length)
{
int err = 0;
assert (tr_isTorrent (tor));
if (index >= tor->info.pieceCount)
err = 1;
else if (length < 1)
err = 2;
else if ((offset + length) > tr_torPieceCountBytes (tor, index))
err = 3;
else if (length > MAX_BLOCK_SIZE)
err = 4;
else if (tr_pieceOffset (tor, index, offset, length) > tor->info.totalSize)
err = 5;
if (err) tr_tordbg (tor, "index %lu offset %lu length %lu err %d\n",
(unsigned long)index,
(unsigned long)offset,
(unsigned long)length,
err);
return !err;
}
uint64_t
tr_pieceOffset (const tr_torrent * tor,
tr_piece_index_t index,
uint32_t offset,
uint32_t length)
{
uint64_t ret;
assert (tr_isTorrent (tor));
ret = tor->info.pieceSize;
ret *= index;
ret += offset;
ret += length;
return ret;
}
void
tr_torGetFileBlockRange (const tr_torrent * tor,
const tr_file_index_t file,
tr_block_index_t * first,
tr_block_index_t * last)
{
const tr_file * f = &tor->info.files[file];
uint64_t offset = f->offset;
*first = offset / tor->blockSize;
if (!f->length)
*last = *first;
else {
offset += f->length - 1;
*last = offset / tor->blockSize;
}
}
void
tr_torGetPieceBlockRange (const tr_torrent * tor,
const tr_piece_index_t piece,
tr_block_index_t * first,
tr_block_index_t * last)
{
uint64_t offset = tor->info.pieceSize;
offset *= piece;
*first = offset / tor->blockSize;
offset += (tr_torPieceCountBytes (tor, piece) - 1);
*last = offset / tor->blockSize;
}
/***
****
***/
void
tr_torrentSetPieceChecked (tr_torrent * tor, tr_piece_index_t pieceIndex)
{
assert (tr_isTorrent (tor));
assert (pieceIndex < tor->info.pieceCount);
tor->info.pieces[pieceIndex].timeChecked = tr_time ();
}
void
tr_torrentSetChecked (tr_torrent * tor, time_t when)
{
tr_piece_index_t i, n;
assert (tr_isTorrent (tor));
for (i=0, n=tor->info.pieceCount; i!=n; ++i)
tor->info.pieces[i].timeChecked = when;
}
bool
tr_torrentCheckPiece (tr_torrent * tor, tr_piece_index_t pieceIndex)
{
const bool pass = tr_ioTestPiece (tor, pieceIndex);
tr_deeplog_tor (tor, "[LAZY] tr_torrentCheckPiece tested piece %zu, pass==%d", (size_t)pieceIndex, (int)pass);
tr_torrentSetHasPiece (tor, pieceIndex, pass);
tr_torrentSetPieceChecked (tor, pieceIndex);
tor->anyDate = tr_time ();
tr_torrentSetDirty (tor);
return pass;
}
time_t
tr_torrentGetFileMTime (const tr_torrent * tor, tr_file_index_t i)
{
time_t mtime = 0;
if (!tr_fdFileGetCachedMTime (tor->session, tor->uniqueId, i, &mtime))
tr_torrentFindFile2 (tor, i, NULL, NULL, &mtime);
return mtime;
}
bool
tr_torrentPieceNeedsCheck (const tr_torrent * tor, tr_piece_index_t p)
{
uint64_t unused;
tr_file_index_t f;
const tr_info * inf = tr_torrentInfo (tor);
/* if we've never checked this piece, then it needs to be checked */
if (!inf->pieces[p].timeChecked)
return true;
/* If we think we've completed one of the files in this piece,
* but it's been modified since we last checked it,
* then it needs to be rechecked */
tr_ioFindFileLocation (tor, p, 0, &f, &unused);
for (; f < inf->fileCount && pieceHasFile (p, &inf->files[f]); ++f)
if (tr_cpFileIsComplete (&tor->completion, f))
if (tr_torrentGetFileMTime (tor, f) > inf->pieces[p].timeChecked)
return true;
return false;
}
/***
****
***/
static int
compareTrackerByTier (const void * va, const void * vb)
{
const tr_tracker_info * a = va;
const tr_tracker_info * b = vb;
/* sort by tier */
if (a->tier != b->tier)
return a->tier - b->tier;
/* get the effects of a stable sort by comparing the two elements' addresses */
return a - b;
}
bool
tr_torrentSetAnnounceList (tr_torrent * tor,
const tr_tracker_info * trackers_in,
int trackerCount)
{
int i;
tr_variant metainfo;
bool ok = true;
tr_tracker_info * trackers;
tr_torrentLock (tor);
assert (tr_isTorrent (tor));
/* ensure the trackers' tiers are in ascending order */
trackers = tr_memdup (trackers_in, sizeof (tr_tracker_info) * trackerCount);
qsort (trackers, trackerCount, sizeof (tr_tracker_info), compareTrackerByTier);
/* look for bad URLs */
for (i=0; ok && i<trackerCount; ++i)
if (!tr_urlIsValidTracker (trackers[i].announce))
ok = false;
/* save to the .torrent file */
if (ok && !tr_variantFromFile (&metainfo, TR_VARIANT_FMT_BENC, tor->info.torrent))
{
bool hasInfo;
tr_info tmpInfo;
/* remove the old fields */
tr_variantDictRemove (&metainfo, TR_KEY_announce);
tr_variantDictRemove (&metainfo, TR_KEY_announce_list);
/* add the new fields */
if (trackerCount > 0)
{
tr_variantDictAddStr (&metainfo, TR_KEY_announce, trackers[0].announce);
}
if (trackerCount > 1)
{
int i;
int prevTier = -1;
tr_variant * tier = NULL;
tr_variant * announceList = tr_variantDictAddList (&metainfo, TR_KEY_announce_list, 0);
for (i=0; i<trackerCount; ++i) {
if (prevTier != trackers[i].tier) {
prevTier = trackers[i].tier;
tier = tr_variantListAddList (announceList, 0);
}
tr_variantListAddStr (tier, trackers[i].announce);
}
}
/* try to parse it back again, to make sure it's good */
memset (&tmpInfo, 0, sizeof (tr_info));
if (tr_metainfoParse (tor->session, &metainfo, &tmpInfo,
&hasInfo, &tor->infoDictLength))
{
/* it's good, so keep these new trackers and free the old ones */
tr_info swap;
swap.trackers = tor->info.trackers;
swap.trackerCount = tor->info.trackerCount;
tor->info.trackers = tmpInfo.trackers;
tor->info.trackerCount = tmpInfo.trackerCount;
tmpInfo.trackers = swap.trackers;
tmpInfo.trackerCount = swap.trackerCount;
tr_metainfoFree (&tmpInfo);
tr_variantToFile (&metainfo, TR_VARIANT_FMT_BENC, tor->info.torrent);
}
/* cleanup */
tr_variantFree (&metainfo);
/* 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))
{
bool clear = true;
for (i=0; clear && i<trackerCount; ++i)
if (!strcmp (trackers[i].announce, tor->errorTracker))
clear = false;
if (clear)
tr_torrentClearError (tor);
}
/* tell the announcer to reload this torrent's tracker list */
tr_announcerResetTorrent (tor->session->announcer, tor);
}
tr_torrentUnlock (tor);
tr_free (trackers);
return ok;
}
/**
***
**/
void
tr_torrentSetAddedDate (tr_torrent * tor,
time_t t)
{
assert (tr_isTorrent (tor));
tor->addedDate = t;
tor->anyDate = MAX (tor->anyDate, tor->addedDate);
}
void
tr_torrentSetActivityDate (tr_torrent * tor, time_t t)
{
assert (tr_isTorrent (tor));
tor->activityDate = t;
tor->anyDate = MAX (tor->anyDate, tor->activityDate);
}
void
tr_torrentSetDoneDate (tr_torrent * tor,
time_t t)
{
assert (tr_isTorrent (tor));
tor->doneDate = t;
tor->anyDate = MAX (tor->anyDate, tor->doneDate);
}
/**
***
**/
uint64_t
tr_torrentGetBytesLeftToAllocate (const tr_torrent * tor)
{
tr_file_index_t i;
uint64_t bytesLeft = 0;
assert (tr_isTorrent (tor));
for (i=0; i<tor->info.fileCount; ++i)
{
if (!tor->info.files[i].dnd)
{
struct stat sb;
const uint64_t length = tor->info.files[i].length;
char * path = tr_torrentFindFile (tor, i);
bytesLeft += length;
if ((path != NULL) && !stat (path, &sb)
&& S_ISREG (sb.st_mode)
&& ((uint64_t)sb.st_size <= length))
bytesLeft -= sb.st_size;
tr_free (path);
}
}
return bytesLeft;
}
/****
***** Removing the torrent's local data
****/
static bool
isJunkFile (const char * base)
{
int i;
static const char * files[] = { ".DS_Store", "desktop.ini", "Thumbs.db" };
static const int file_count = sizeof (files) / sizeof (files[0]);
for (i=0; i<file_count; ++i)
if (!strcmp (base, files[i]))
return true;
#ifdef SYS_DARWIN
/* check for resource forks. <http://support.apple.com/kb/TA20578> */
if (!memcmp (base, "._", 2))
return true;
#endif
return false;
}
static void
removeEmptyFoldersAndJunkFiles (const char * folder)
{
DIR * odir;
if ((odir = opendir (folder))) {
struct dirent * d;
while ((d = readdir (odir))) {
if (strcmp (d->d_name, ".") && strcmp (d->d_name, "..")) {
struct stat sb;
char * filename = tr_buildPath (folder, d->d_name, NULL);
if (!stat (filename, &sb) && S_ISDIR (sb.st_mode))
removeEmptyFoldersAndJunkFiles (filename);
else if (isJunkFile (d->d_name))
remove (filename);
tr_free (filename);
}
}
remove (folder);
closedir (odir);
}
}
/**
* 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 * tor, tr_fileFunc func)
{
int i, n;
tr_file_index_t f;
char * base;
DIR * odir;
char * tmpdir = NULL;
tr_ptrArray files = TR_PTR_ARRAY_INIT;
tr_ptrArray folders = TR_PTR_ARRAY_INIT;
const void * const vstrcmp = strcmp;
const char * const top = tor->currentDir;
/* if it's a magnet link, there's nothing to move... */
if (!tr_torrentHasMetadata (tor))
return;
/***
**** Move the local data to a new tmpdir
***/
base = tr_strdup_printf ("%s__XXXXXX", tr_torrentName (tor));
tmpdir = tr_buildPath (top, base, NULL);
tr_mkdtemp (tmpdir);
tr_free (base);
for (f=0; f<tor->info.fileCount; ++f)
{
char * filename = tr_buildPath (top, tor->info.files[f].name, NULL);
if (!tr_fileExists (filename, NULL)) {
char * partial = tr_torrentBuildPartial (tor, f);
tr_free (filename);
filename = tr_buildPath (top, partial, NULL);
tr_free (partial);
if (!tr_fileExists (filename, NULL)) {
tr_free (filename);
filename = NULL;
}
}
if (filename != NULL)
{
char * target = tr_buildPath (tmpdir, tor->info.files[f].name, NULL);
char * target_dir = tr_dirname (target);
tr_mkdirp (target_dir, 0777);
rename (filename, target);
tr_ptrArrayAppend (&files, target);
tr_free (target_dir);
tr_free (filename);
}
}
/***
**** 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 ((odir = opendir (tmpdir)))
{
struct dirent * d;
while ((d = readdir (odir)))
{
if (strcmp (d->d_name, ".") && strcmp (d->d_name, ".."))
{
char * file = tr_buildPath (tmpdir, d->d_name, NULL);
func (file);
tr_free (file);
}
}
closedir (odir);
}
/* go from the bottom up */
for (i=0, n=tr_ptrArraySize (&files); i<n; ++i)
{
char * walk = tr_strdup (tr_ptrArrayNth (&files, i));
while (tr_fileExists (walk, NULL) && !tr_is_same_file (tmpdir, walk))
{
char * tmp = tr_dirname (walk);
func (walk);
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 (f=0; f<tor->info.fileCount; ++f)
{
/* get the directory that this file goes in... */
char * filename = tr_buildPath (top, tor->info.files[f].name, NULL);
char * dir = tr_dirname (filename);
if (!tr_is_same_file (top, dir) && strcmp (top, dir)) {
for (;;) {
char * parent = tr_dirname (dir);
if (tr_is_same_file (top, parent) || !strcmp (top, parent)) {
if (tr_ptrArrayFindSorted (&folders, dir, vstrcmp) == NULL) {
tr_ptrArrayInsertSorted (&folders, tr_strdup (dir), vstrcmp);
}
break;
}
tr_free (dir);
dir = parent;
}
}
tr_free (dir);
tr_free (filename);
}
for (i=0, n=tr_ptrArraySize (&folders); i<n; ++i)
removeEmptyFoldersAndJunkFiles (tr_ptrArrayNth (&folders, i));
/* cleanup */
rmdir (tmpdir);
tr_free (tmpdir);
tr_ptrArrayDestruct (&folders, tr_free);
tr_ptrArrayDestruct (&files, tr_free);
}
static void
tr_torrentDeleteLocalData (tr_torrent * tor, tr_fileFunc func)
{
assert (tr_isTorrent (tor));
if (func == NULL)
func = 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
{
bool move_from_old_location;
volatile int * setme_state;
volatile double * setme_progress;
char * location;
tr_torrent * tor;
};
static void
setLocation (void * vdata)
{
bool err = false;
struct LocationData * data = vdata;
tr_torrent * tor = data->tor;
const bool do_move = data->move_from_old_location;
const char * location = data->location;
double bytesHandled = 0;
assert (tr_isTorrent (tor));
tr_dbg ("Moving \"%s\" location from currentDir \"%s\" to \"%s\"",
tr_torrentName (tor), tor->currentDir, location);
tr_mkdirp (location, 0777);
if (!tr_is_same_file (location, tor->currentDir))
{
tr_file_index_t i;
/* 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 (i=0; !err && i<tor->info.fileCount; ++i)
{
const tr_file * f = &tor->info.files[i];
const char * oldbase;
char * sub;
if (tr_torrentFindFile2 (tor, i, &oldbase, &sub, NULL))
{
char * oldpath = tr_buildPath (oldbase, sub, NULL);
char * newpath = tr_buildPath (location, sub, NULL);
tr_dbg ("Found file #%d: %s", (int)i, oldpath);
if (do_move && !tr_is_same_file (oldpath, newpath))
{
bool renamed = false;
errno = 0;
tr_torinf (tor, "moving \"%s\" to \"%s\"", oldpath, newpath);
if (tr_moveFile (oldpath, newpath, &renamed))
{
err = true;
tr_torerr (tor, "error moving \"%s\" to \"%s\": %s",
oldpath, newpath, tr_strerror (errno));
}
}
tr_free (newpath);
tr_free (oldpath);
tr_free (sub);
}
if (data->setme_progress)
{
bytesHandled += f->length;
*data->setme_progress = bytesHandled / tor->info.totalSize;
}
}
if (!err)
{
/* blow away the leftover subdirectories in the old location */
if (do_move)
tr_torrentDeleteLocalData (tor, remove);
/* set the new location and reverify */
tr_torrentSetDownloadDir (tor, location);
}
}
if (!err && do_move)
{
tr_free (tor->incompleteDir);
tor->incompleteDir = NULL;
tor->currentDir = tor->downloadDir;
}
if (data->setme_state)
*data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
/* cleanup */
tr_free (data->location);
tr_free (data);
}
void
tr_torrentSetLocation (tr_torrent * tor,
const char * location,
bool move_from_old_location,
volatile double * setme_progress,
volatile int * setme_state)
{
struct LocationData * data;
assert (tr_isTorrent (tor));
if (setme_state)
*setme_state = TR_LOC_MOVING;
if (setme_progress)
*setme_progress = 0;
/* run this in the libtransmission thread */
data = tr_new (struct LocationData, 1);
data->tor = tor;
data->location = tr_strdup (location);
data->move_from_old_location = move_from_old_location;
data->setme_state = setme_state;
data->setme_progress = setme_progress;
tr_runInEventThread (tor->session, setLocation, data);
}
/***
****
***/
void
tr_torrentFileCompleted (tr_torrent * tor, tr_file_index_t fileNum)
{
char * sub;
const char * base;
const tr_info * inf = &tor->info;
const tr_file * f = &inf->files[fileNum];
tr_piece * p;
const tr_piece * pend;
const time_t now = tr_time ();
/* close the file so that we can reopen in read-only mode as needed */
tr_fdFileClose (tor->session, tor, fileNum);
/* 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 */
for (p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]; p!=pend; ++p)
p->timeChecked = now;
/* 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 */
if (tr_torrentFindFile2 (tor, fileNum, &base, &sub, NULL))
{
if (strcmp (sub, f->name))
{
char * oldpath = tr_buildPath (base, sub, NULL);
char * newpath = tr_buildPath (base, f->name, NULL);
if (rename (oldpath, newpath))
tr_torerr (tor, "Error moving \"%s\" to \"%s\": %s", oldpath, newpath, tr_strerror (errno));
tr_free (newpath);
tr_free (oldpath);
}
tr_free (sub);
}
}
/***
****
***/
bool
tr_torrentFindFile2 (const tr_torrent * tor, tr_file_index_t fileNum,
const char ** base, char ** subpath, time_t * mtime)
{
char * part = NULL;
const tr_file * file;
const char * b = NULL;
const char * s = NULL;
assert (tr_isTorrent (tor));
assert (fileNum < tor->info.fileCount);
file = &tor->info.files[fileNum];
if (b == NULL) {
char * filename = tr_buildPath (tor->downloadDir, file->name, NULL);
if (tr_fileExists (filename, mtime)) {
b = tor->downloadDir;
s = file->name;
}
tr_free (filename);
}
if ((b == NULL) && (tor->incompleteDir != NULL)) {
char * filename = tr_buildPath (tor->incompleteDir, file->name, NULL);
if (tr_fileExists (filename, mtime)) {
b = tor->incompleteDir;
s = file->name;
}
tr_free (filename);
}
if (b == NULL)
part = tr_torrentBuildPartial (tor, fileNum);
if ((b == NULL) && (tor->incompleteDir != NULL)) {
char * filename = tr_buildPath (tor->incompleteDir, part, NULL);
if (tr_fileExists (filename, mtime)) {
b = tor->incompleteDir;
s = part;
}
tr_free (filename);
}
if (b == NULL) {
char * filename = tr_buildPath (tor->downloadDir, part, NULL);
if (tr_fileExists (filename, mtime)) {
b = tor->downloadDir;
s = part;
}
tr_free (filename);
}
if (base != NULL)
*base = b;
if (subpath != NULL)
*subpath = tr_strdup (s);
tr_free (part);
return b != NULL;
}
char*
tr_torrentFindFile (const tr_torrent * tor, tr_file_index_t fileNum)
{
char * subpath;
char * ret = NULL;
const char * base;
if (tr_torrentFindFile2 (tor, fileNum, &base, &subpath, NULL))
{
ret = tr_buildPath (base, subpath, NULL);
tr_free (subpath);
}
return ret;
}
/* Decide whether we should be looking for files in downloadDir or incompleteDir. */
static void
refreshCurrentDir (tr_torrent * tor)
{
const char * dir = NULL;
if (tor->incompleteDir == NULL)
dir = tor->downloadDir;
else if (!tr_torrentHasMetadata (tor)) /* no files to find */
dir = tor->incompleteDir;
else if (!tr_torrentFindFile2 (tor, 0, &dir, NULL, NULL))
dir = tor->incompleteDir;
assert (dir != NULL);
assert ((dir == tor->downloadDir) || (dir == tor->incompleteDir));
tor->currentDir = dir;
}
char*
tr_torrentBuildPartial (const tr_torrent * tor, tr_file_index_t fileNum)
{
return tr_strdup_printf ("%s.part", tor->info.files[fileNum].name);
}
/***
****
***/
static int
compareTorrentByQueuePosition (const void * va, const void * vb)
{
const tr_torrent * a = * (const tr_torrent **) va;
const tr_torrent * b = * (const tr_torrent **) vb;
return a->queuePosition - b->queuePosition;
}
#ifndef NDEBUG
static bool
queueIsSequenced (tr_session * session)
{
int i ;
int n ;
bool is_sequenced = true;
tr_torrent * tor;
tr_torrent ** tmp = tr_new (tr_torrent *, session->torrentCount);
/* get all the torrents */
n = 0;
tor = NULL;
while ((tor = tr_torrentNext (session, tor)))
tmp[n++] = tor;
/* sort them by position */
qsort (tmp, n, sizeof (tr_torrent *), compareTorrentByQueuePosition);
#if 0
fprintf (stderr, "%s", "queue: ");
for (i=0; i<n; ++i)
fprintf (stderr, "%d ", tmp[i]->queuePosition);
fputc ('\n', stderr);
#endif
/* test them */
for (i=0; is_sequenced && i<n; ++i)
if (tmp[i]->queuePosition != i)
is_sequenced = false;
tr_free (tmp);
return is_sequenced;
}
#endif
int
tr_torrentGetQueuePosition (const tr_torrent * tor)
{
return tor->queuePosition;
}
void
tr_torrentSetQueuePosition (tr_torrent * tor, int pos)
{
int back = -1;
tr_torrent * walk;
const int old_pos = tor->queuePosition;
const time_t now = tr_time ();
if (pos < 0)
pos = 0;
tor->queuePosition = -1;
walk = NULL;
while ((walk = tr_torrentNext (tor->session, walk)))
{
if (old_pos < pos) {
if ((old_pos <= walk->queuePosition) && (walk->queuePosition <= pos)) {
walk->queuePosition--;
walk->anyDate = now;
}
}
if (old_pos > pos) {
if ((pos <= walk->queuePosition) && (walk->queuePosition < old_pos)) {
walk->queuePosition++;
walk->anyDate = now;
}
}
if (back < walk->queuePosition)
back = walk->queuePosition;
}
tor->queuePosition = MIN (pos, (back+1));
tor->anyDate = now;
assert (queueIsSequenced (tor->session));
}
void
tr_torrentsQueueMoveTop (tr_torrent ** torrents_in, int n)
{
int i;
tr_torrent ** torrents = tr_memdup (torrents_in, sizeof (tr_torrent *) * n);
qsort (torrents, n, sizeof (tr_torrent *), compareTorrentByQueuePosition);
for (i=n-1; i>=0; --i)
tr_torrentSetQueuePosition (torrents[i], 0);
tr_free (torrents);
}
void
tr_torrentsQueueMoveUp (tr_torrent ** torrents_in, int n)
{
int i;
tr_torrent ** torrents = tr_memdup (torrents_in, sizeof (tr_torrent *) * n);
qsort (torrents, n, sizeof (tr_torrent *), compareTorrentByQueuePosition);
for (i=0; i<n; ++i)
tr_torrentSetQueuePosition (torrents[i], torrents[i]->queuePosition - 1);
tr_free (torrents);
}
void
tr_torrentsQueueMoveDown (tr_torrent ** torrents_in, int n)
{
int i;
tr_torrent ** torrents = tr_memdup (torrents_in, sizeof (tr_torrent *) * n);
qsort (torrents, n, sizeof (tr_torrent *), compareTorrentByQueuePosition);
for (i=n-1; i>=0; --i)
tr_torrentSetQueuePosition (torrents[i], torrents[i]->queuePosition + 1);
tr_free (torrents);
}
void
tr_torrentsQueueMoveBottom (tr_torrent ** torrents_in, int n)
{
int i;
tr_torrent ** torrents = tr_memdup (torrents_in, sizeof (tr_torrent *) * n);
qsort (torrents, n, sizeof (tr_torrent *), compareTorrentByQueuePosition);
for (i=0; i<n; ++i)
tr_torrentSetQueuePosition (torrents[i], INT_MAX);
tr_free (torrents);
}
static void
torrentSetQueued (tr_torrent * tor, bool queued)
{
assert (tr_isTorrent (tor));
assert (tr_isBool (queued));
if (tr_torrentIsQueued (tor) != queued)
{
tor->isQueued = queued;
tor->anyDate = tr_time ();
}
}
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;
}
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