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announcer.c
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announcer.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: announcer.c 14344 2014-12-08 00:27:14Z jordan $
*/
#include <assert.h>
#include <limits.h> /* INT_MAX */
#include <stdio.h>
#include <stdlib.h> /* qsort() */
#include <string.h> /* strcmp(), memcpy() */
#include <event2/buffer.h>
#include <event2/event.h> /* evtimer */
#define __LIBTRANSMISSION_ANNOUNCER_MODULE___
#include "transmission.h"
#include "announcer.h"
#include "announcer-common.h"
#include "crypto.h" /* tr_cryptoRandInt(), tr_cryptoWeakRandInt() */
#include "net.h" /* tr_address_to_string() */
#include "peer-mgr.h" /* tr_peerMgrCompactToPex() */
#include "ptrarray.h"
#include "session.h"
#include "torrent.h"
#include "utils.h"
struct tr_tier;
static void tier_build_log_name( const struct tr_tier * tier,
char * buf, size_t buflen );
#define dbgmsg( tier, ... ) \
if( tr_deepLoggingIsActive( ) ) do { \
char name[128]; \
tier_build_log_name( tier, name, sizeof( name ) ); \
tr_deepLog( __FILE__, __LINE__, name, __VA_ARGS__ ); \
} while( 0 )
enum
{
/* unless the tracker says otherwise, rescrape this frequently */
DEFAULT_SCRAPE_INTERVAL_SEC = ( 60 * 30 ),
/* unless the tracker says otherwise, this is the announce interval */
DEFAULT_ANNOUNCE_INTERVAL_SEC = ( 60 * 10 ),
/* unless the tracker says otherwise, this is the announce min_interval */
DEFAULT_ANNOUNCE_MIN_INTERVAL_SEC = ( 60 * 2 ),
/* how many web tasks we allow at one time */
MAX_CONCURRENT_TASKS = 48,
/* the value of the 'numwant' argument passed in tracker requests. */
NUMWANT = 80,
UPKEEP_INTERVAL_SECS = 1,
/* this is how often to call the UDP tracker upkeep */
TAU_UPKEEP_INTERVAL_SECS = 5
};
/***
****
***/
const char*
tr_announce_event_get_string( tr_announce_event e )
{
switch( e )
{
case TR_ANNOUNCE_EVENT_COMPLETED: return "completed";
case TR_ANNOUNCE_EVENT_STARTED: return "started";
case TR_ANNOUNCE_EVENT_STOPPED: return "stopped";
default: return "";
}
}
/***
****
***/
static int
compareTransfer( uint64_t a_uploaded, uint64_t a_downloaded,
uint64_t b_uploaded, uint64_t b_downloaded )
{
/* higher upload count goes first */
if( a_uploaded != b_uploaded )
return a_uploaded > b_uploaded ? -1 : 1;
/* then higher download count goes first */
if( a_downloaded != b_downloaded )
return a_downloaded > b_downloaded ? -1 : 1;
return 0;
}
/**
* Comparison function for tr_announce_requests.
*
* The primary key (amount of data transferred) is used to prioritize
* tracker announcements of active torrents. The remaining keys are
* used to satisfy the uniqueness requirement of a sorted tr_ptrArray.
*/
static int
compareStops( const void * va, const void * vb )
{
int i;
const tr_announce_request * a = va;
const tr_announce_request * b = vb;
/* primary key: volume of data transferred. */
if(( i = compareTransfer( a->up, a->down, b->up, b->down)))
return i;
/* secondary key: the torrent's info_hash */
if(( i = memcmp( a->info_hash, b->info_hash, SHA_DIGEST_LENGTH )))
return i;
/* tertiary key: the tracker's announec url */
return tr_strcmp0( a->url, b->url );
}
/***
****
***/
bool
tr_announcerHasBacklog( const tr_announcer * announcer )
{
return announcer->slotsAvailable < 1;
}
static void
onUpkeepTimer( int foo UNUSED, short bar UNUSED, void * vannouncer );
void
tr_announcerInit( tr_session * session )
{
tr_announcer * a;
assert( tr_isSession( session ) );
a = tr_new0( tr_announcer, 1 );
a->stops = TR_PTR_ARRAY_INIT;
a->key = tr_cryptoRandInt( INT_MAX );
a->session = session;
a->slotsAvailable = MAX_CONCURRENT_TASKS;
a->upkeepTimer = evtimer_new( session->event_base, onUpkeepTimer, a );
tr_timerAdd( a->upkeepTimer, UPKEEP_INTERVAL_SECS, 0 );
session->announcer = a;
}
static void flushCloseMessages( tr_announcer * announcer );
void
tr_announcerClose( tr_session * session )
{
tr_announcer * announcer = session->announcer;
flushCloseMessages( announcer );
tr_tracker_udp_start_shutdown( session );
event_free( announcer->upkeepTimer );
announcer->upkeepTimer = NULL;
tr_ptrArrayDestruct( &announcer->stops, NULL );
session->announcer = NULL;
tr_free( announcer );
}
/***
****
***/
/* a row in tr_tier's list of trackers */
typedef struct
{
char * key;
char * announce;
char * scrape;
char * tracker_id_str;
int seederCount;
int leecherCount;
int downloadCount;
int downloaderCount;
int consecutiveFailures;
uint32_t id;
}
tr_tracker;
/* format: host+':'+ port */
static char *
getKey( const char * url )
{
char * ret;
char * scheme = NULL;
char * host = NULL;
int port = 0;
tr_urlParse( url, -1, &scheme, &host, &port, NULL );
ret = tr_strdup_printf( "%s://%s:%d", (scheme?scheme:"invalid"), (host?host:"invalid"), port );
tr_free( host );
tr_free( scheme );
return ret;
}
static void
trackerConstruct( tr_tracker * tracker, const tr_tracker_info * inf )
{
memset( tracker, 0, sizeof( tr_tracker ) );
tracker->key = getKey( inf->announce );
tracker->announce = tr_strdup( inf->announce );
tracker->scrape = tr_strdup( inf->scrape );
tracker->id = inf->id;
tracker->seederCount = -1;
tracker->leecherCount = -1;
tracker->downloadCount = -1;
}
static void
trackerDestruct( tr_tracker * tracker )
{
tr_free( tracker->tracker_id_str );
tr_free( tracker->scrape );
tr_free( tracker->announce );
tr_free( tracker->key );
}
/***
****
***/
struct tr_torrent_tiers;
/** @brief A group of trackers in a single tier, as per the multitracker spec */
typedef struct tr_tier
{
/* number of up/down/corrupt bytes since the last time we sent an
* "event=stopped" message that was acknowledged by the tracker */
uint64_t byteCounts[3];
tr_tracker * trackers;
int tracker_count;
tr_tracker * currentTracker;
int currentTrackerIndex;
tr_torrent * tor;
time_t scrapeAt;
time_t lastScrapeStartTime;
time_t lastScrapeTime;
bool lastScrapeSucceeded;
bool lastScrapeTimedOut;
time_t announceAt;
time_t manualAnnounceAllowedAt;
time_t lastAnnounceStartTime;
time_t lastAnnounceTime;
bool lastAnnounceSucceeded;
bool lastAnnounceTimedOut;
tr_announce_event * announce_events;
int announce_event_count;
int announce_event_alloc;
/* unique lookup key */
int key;
int scrapeIntervalSec;
int announceIntervalSec;
int announceMinIntervalSec;
int lastAnnouncePeerCount;
bool isRunning;
bool isAnnouncing;
bool isScraping;
bool wasCopied;
char lastAnnounceStr[128];
char lastScrapeStr[128];
}
tr_tier;
static time_t
get_next_scrape_time( const tr_session * session, const tr_tier * tier, int interval )
{
time_t ret;
const time_t now = tr_time( );
/* Maybe don't scrape paused torrents */
if( !tier->isRunning && !session->scrapePausedTorrents )
ret = 0;
/* Add the interval, and then increment to the nearest 10th second.
* The latter step is to increase the odds of several torrents coming
* due at the same time to improve multiscrape. */
else {
ret = now + interval;
while( ret % 10 )
++ret;
}
return ret;
}
static void
tierConstruct( tr_tier * tier, tr_torrent * tor )
{
static int nextKey = 1;
memset( tier, 0, sizeof( tr_tier ) );
tier->key = nextKey++;
tier->currentTrackerIndex = -1;
tier->scrapeIntervalSec = DEFAULT_SCRAPE_INTERVAL_SEC;
tier->announceIntervalSec = DEFAULT_ANNOUNCE_INTERVAL_SEC;
tier->announceMinIntervalSec = DEFAULT_ANNOUNCE_MIN_INTERVAL_SEC;
tier->scrapeAt = get_next_scrape_time( tor->session, tier, tr_cryptoWeakRandInt( 180 ) );
tier->tor = tor;
}
static void
tierDestruct( tr_tier * tier )
{
tr_free( tier->announce_events );
}
static void
tier_build_log_name( const tr_tier * tier, char * buf, size_t buflen )
{
tr_snprintf( buf, buflen, "[%s---%s]",
( tier && tier->tor ) ? tr_torrentName( tier->tor ) : "?",
( tier && tier->currentTracker ) ? tier->currentTracker->key : "?" );
}
static void
tierIncrementTracker( tr_tier * tier )
{
/* move our index to the next tracker in the tier */
const int i = ( tier->currentTracker == NULL )
? 0
: ( tier->currentTrackerIndex + 1 ) % tier->tracker_count;
tier->currentTrackerIndex = i;
tier->currentTracker = &tier->trackers[i];
/* reset some of the tier's fields */
tier->scrapeIntervalSec = DEFAULT_SCRAPE_INTERVAL_SEC;
tier->announceIntervalSec = DEFAULT_ANNOUNCE_INTERVAL_SEC;
tier->announceMinIntervalSec = DEFAULT_ANNOUNCE_MIN_INTERVAL_SEC;
tier->isAnnouncing = false;
tier->isScraping = false;
tier->lastAnnounceStartTime = 0;
tier->lastScrapeStartTime = 0;
}
/***
****
***/
/**
* @brief Opaque, per-torrent data structure for tracker announce information
*
* this opaque data structure can be found in tr_torrent.tiers
*/
typedef struct tr_torrent_tiers
{
tr_tier * tiers;
int tier_count;
tr_tracker * trackers;
int tracker_count;
tr_tracker_callback * callback;
void * callbackData;
}
tr_torrent_tiers;
static tr_torrent_tiers*
tiersNew( void )
{
return tr_new0( tr_torrent_tiers, 1 );
}
static void
tiersDestruct( tr_torrent_tiers * tt )
{
int i;
for( i=0; i<tt->tracker_count; ++i )
trackerDestruct( &tt->trackers[i] );
tr_free( tt->trackers );
for( i=0; i<tt->tier_count; ++i )
tierDestruct( &tt->tiers[i] );
tr_free( tt->tiers );
}
static void
tiersFree( tr_torrent_tiers * tt )
{
tiersDestruct( tt );
tr_free( tt );
}
static tr_tier*
getTier( tr_announcer * announcer, const uint8_t * info_hash, int tierId )
{
tr_tier * tier = NULL;
if( announcer != NULL )
{
tr_session * session = announcer->session;
tr_torrent * tor = tr_torrentFindFromHash( session, info_hash );
if( tor && tor->tiers )
{
int i;
tr_torrent_tiers * tt = tor->tiers;
for( i=0; !tier && i<tt->tier_count; ++i )
if( tt->tiers[i].key == tierId )
tier = &tt->tiers[i];
}
}
return tier;
}
/***
**** PUBLISH
***/
static const tr_tracker_event TRACKER_EVENT_INIT = { 0, 0, 0, 0, 0, 0 };
static void
publishMessage( tr_tier * tier, const char * msg, int type )
{
if( tier && tier->tor && tier->tor->tiers && tier->tor->tiers->callback )
{
tr_torrent_tiers * tiers = tier->tor->tiers;
tr_tracker_event event = TRACKER_EVENT_INIT;
event.messageType = type;
event.text = msg;
if( tier->currentTracker )
event.tracker = tier->currentTracker->announce;
tiers->callback( tier->tor, &event, tiers->callbackData );
}
}
static void
publishErrorClear( tr_tier * tier )
{
publishMessage( tier, NULL, TR_TRACKER_ERROR_CLEAR );
}
static void
publishWarning( tr_tier * tier, const char * msg )
{
publishMessage( tier, msg, TR_TRACKER_WARNING );
}
static void
publishError( tr_tier * tier, const char * msg )
{
publishMessage( tier, msg, TR_TRACKER_ERROR );
}
static int8_t
getSeedProbability( tr_tier * tier, int seeds, int leechers, int pex_count )
{
/* special case optimization:
ocelot omits seeds from peer lists sent to seeds on private trackers.
so check for that case... */
if( ( leechers == pex_count ) && tr_torrentIsPrivate( tier->tor )
&& tr_torrentIsSeed( tier->tor )
&& ( seeds + leechers < NUMWANT ) )
return 0;
if( seeds>=0 && leechers>=0 && (seeds+leechers>0) )
return (int8_t)((100.0*seeds)/(seeds+leechers));
return -1; /* unknown */
}
static void
publishPeersPex( tr_tier * tier, int seeds, int leechers,
const tr_pex * pex, int n )
{
if( tier->tor->tiers->callback )
{
tr_tracker_event e = TRACKER_EVENT_INIT;
e.messageType = TR_TRACKER_PEERS;
e.seedProbability = getSeedProbability( tier, seeds, leechers, n );
e.pex = pex;
e.pexCount = n;
dbgmsg( tier, "got %d peers; seed prob %d", n, (int)e.seedProbability );
tier->tor->tiers->callback( tier->tor, &e, NULL );
}
}
/***
****
***/
struct ann_tracker_info
{
tr_tracker_info info;
char * scheme;
char * host;
char * path;
int port;
};
/* primary key: tier
* secondary key: udp comes before http */
static int
filter_trackers_compare_func( const void * va, const void * vb )
{
const struct ann_tracker_info * a = va;
const struct ann_tracker_info * b = vb;
if( a->info.tier != b->info.tier )
return a->info.tier - b->info.tier;
return -strcmp( a->scheme, b->scheme );
}
/**
* Massages the incoming list of trackers into something we can use.
*/
static tr_tracker_info *
filter_trackers( tr_tracker_info * input, int input_count, int * setme_count )
{
int i, in;
int j, jn;
int n = 0;
struct tr_tracker_info * ret;
struct ann_tracker_info * tmp = tr_new0( struct ann_tracker_info, input_count );
/*for( i=0, in=input_count; i<in; ++i ) fprintf( stderr, "IN: [%d][%s]\n", input[i].tier, input[i].announce );*/
/* build a list of valid trackers */
for( i=0, in=input_count; i<in; ++i ) {
if( tr_urlIsValidTracker( input[i].announce ) ) {
int port;
char * scheme;
char * host;
char * path;
bool is_duplicate = false;
tr_urlParse( input[i].announce, -1, &scheme, &host, &port, &path );
/* weed out one common source of duplicates:
* "http://tracker/announce" +
* "http://tracker:80/announce"
*/
for( j=0, jn=n; !is_duplicate && j<jn; ++j )
is_duplicate = (tmp[j].port==port)
&& !strcmp(tmp[j].scheme,scheme)
&& !strcmp(tmp[j].host,host)
&& !strcmp(tmp[j].path,path);
if( is_duplicate ) {
tr_free( path );
tr_free( host );
tr_free( scheme );
continue;
}
tmp[n].info = input[i];
tmp[n].scheme = scheme;
tmp[n].host = host;
tmp[n].port = port;
tmp[n].path = path;
n++;
}
}
/* if two announce URLs differ only by scheme, put them in the same tier.
* (note: this can leave gaps in the `tier' values, but since the calling
* function doesn't care, there's no point in removing the gaps...) */
for( i=0, in=n; i<in; ++i )
for( j=i+1, jn=n; j<jn; ++j )
if( (tmp[i].info.tier!=tmp[j].info.tier)
&& (tmp[i].port==tmp[j].port)
&& !tr_strcmp0(tmp[i].host,tmp[j].host)
&& !tr_strcmp0(tmp[i].path,tmp[j].path) )
tmp[j].info.tier = tmp[i].info.tier;
/* sort them, for two reasons:
* (1) unjumble the tiers from the previous step
* (2) move the UDP trackers to the front of each tier */
qsort( tmp, n, sizeof(struct ann_tracker_info), filter_trackers_compare_func );
/* build the output */
*setme_count = n;
ret = tr_new0( tr_tracker_info, n );
for( i=0, in=n; i<in; ++i )
ret[i] = tmp[i].info;
/* cleanup */
for( i=0, in=n; i<in; ++i ) {
tr_free( tmp[i].path );
tr_free( tmp[i].host );
tr_free( tmp[i].scheme );
}
tr_free( tmp );
/*for( i=0, in=n; i<in; ++i ) fprintf( stderr, "OUT: [%d][%s]\n", ret[i].tier, ret[i].announce );*/
return ret;
}
static void
addTorrentToTier( tr_torrent_tiers * tt, tr_torrent * tor )
{
int i, n;
int tier_count;
tr_tier * tier;
tr_tracker_info * infos = filter_trackers( tor->info.trackers,
tor->info.trackerCount, &n );
/* build the array of trackers */
tt->trackers = tr_new0( tr_tracker, n );
tt->tracker_count = n;
for( i=0; i<n; ++i )
trackerConstruct( &tt->trackers[i], &infos[i] );
/* count how many tiers there are */
tier_count = 0;
for( i=0; i<n; ++i )
if( !i || ( infos[i].tier != infos[i-1].tier ) )
++tier_count;
/* build the array of tiers */
tier = NULL;
tt->tiers = tr_new0( tr_tier, tier_count );
tt->tier_count = 0;
for( i=0; i<n; ++i ) {
if( i && ( infos[i].tier == infos[i-1].tier ) )
++tier->tracker_count;
else {
tier = &tt->tiers[tt->tier_count++];
tierConstruct( tier, tor );
tier->trackers = &tt->trackers[i];
tier->tracker_count = 1;
tierIncrementTracker( tier );
}
}
/* cleanup */
tr_free( infos );
}
tr_torrent_tiers *
tr_announcerAddTorrent( tr_torrent * tor,
tr_tracker_callback * callback,
void * callbackData )
{
tr_torrent_tiers * tiers;
assert( tr_isTorrent( tor ) );
tiers = tiersNew( );
tiers->callback = callback;
tiers->callbackData = callbackData;
addTorrentToTier( tiers, tor );
return tiers;
}
/***
****
***/
static bool
tierCanManualAnnounce( const tr_tier * tier )
{
return tier->manualAnnounceAllowedAt <= tr_time( );
}
bool
tr_announcerCanManualAnnounce( const tr_torrent * tor )
{
int i;
struct tr_torrent_tiers * tt = NULL;
assert( tr_isTorrent( tor ) );
assert( tor->tiers != NULL );
if( tor->isRunning )
tt = tor->tiers;
/* return true if any tier can manual announce */
for( i=0; tt && i<tt->tier_count; ++i )
if( tierCanManualAnnounce( &tt->tiers[i] ) )
return true;
return false;
}
time_t
tr_announcerNextManualAnnounce( const tr_torrent * tor )
{
int i;
time_t ret = ~(time_t)0;
struct tr_torrent_tiers * tt = tor->tiers;
/* find the earliest manual announce time from all peers */
for( i=0; tt && i<tt->tier_count; ++i )
if( tt->tiers[i].isRunning )
ret = MIN( ret, tt->tiers[i].manualAnnounceAllowedAt );
return ret;
}
static void
dbgmsg_tier_announce_queue( const tr_tier * tier )
{
if( tr_deepLoggingIsActive( ) )
{
int i;
char name[128];
struct evbuffer * buf = evbuffer_new( );
tier_build_log_name( tier, name, sizeof( name ) );
for( i=0; i<tier->announce_event_count; ++i )
{
const tr_announce_event e = tier->announce_events[i];
const char * str = tr_announce_event_get_string( e );
evbuffer_add_printf( buf, "[%d:%s]", i, str );
}
tr_deepLog( __FILE__, __LINE__, name, "announce queue is %s", evbuffer_pullup( buf, -1 ) );
evbuffer_free( buf );
}
}
static void
tier_announce_remove_trailing( tr_tier * tier, tr_announce_event e )
{
while( ( tier->announce_event_count > 0 )
&& ( tier->announce_events[tier->announce_event_count-1] == e ) )
--tier->announce_event_count;
}
static void
tier_announce_event_push( tr_tier * tier,
tr_announce_event e,
time_t announceAt )
{
int i;
assert( tier != NULL );
dbgmsg_tier_announce_queue( tier );
dbgmsg( tier, "queued \"%s\"", tr_announce_event_get_string( e ) );
if( tier->announce_event_count > 0 )
{
/* special case #1: if we're adding a "stopped" event,
* dump everything leading up to it except "completed" */
if( e == TR_ANNOUNCE_EVENT_STOPPED ) {
bool has_completed = false;
const tr_announce_event c = TR_ANNOUNCE_EVENT_COMPLETED;
for( i=0; !has_completed && i<tier->announce_event_count; ++i )
has_completed = c == tier->announce_events[i];
tier->announce_event_count = 0;
if( has_completed )
tier->announce_events[tier->announce_event_count++] = c;
}
/* special case #2: dump all empty strings leading up to this event */
tier_announce_remove_trailing( tier, TR_ANNOUNCE_EVENT_NONE );
/* special case #3: no consecutive duplicates */
tier_announce_remove_trailing( tier, e );
}
/* make room in the array for another event */
if( tier->announce_event_alloc <= tier->announce_event_count ) {
tier->announce_event_alloc += 4;
tier->announce_events = tr_renew( tr_announce_event,
tier->announce_events,
tier->announce_event_alloc );
}
/* add it */
tier->announce_events[tier->announce_event_count++] = e;
tier->announceAt = announceAt;
dbgmsg_tier_announce_queue( tier );
dbgmsg( tier, "announcing in %d seconds", (int)difftime(announceAt,tr_time()) );
}
static tr_announce_event
tier_announce_event_pull( tr_tier * tier )
{
const tr_announce_event e = tier->announce_events[0];
tr_removeElementFromArray( tier->announce_events,
0, sizeof( tr_announce_event ),
tier->announce_event_count-- );
return e;
}
static void
torrentAddAnnounce( tr_torrent * tor, tr_announce_event e, time_t announceAt )
{
int i;
struct tr_torrent_tiers * tt = tor->tiers;
/* walk through each tier and tell them to announce */
for( i=0; i<tt->tier_count; ++i )
tier_announce_event_push( &tt->tiers[i], e, announceAt );
}
void
tr_announcerTorrentStarted( tr_torrent * tor )
{
torrentAddAnnounce( tor, TR_ANNOUNCE_EVENT_STARTED, tr_time( ) );
}
void
tr_announcerManualAnnounce( tr_torrent * tor )
{
torrentAddAnnounce( tor, TR_ANNOUNCE_EVENT_NONE, tr_time( ) );
}
void
tr_announcerTorrentStopped( tr_torrent * tor )
{
torrentAddAnnounce( tor, TR_ANNOUNCE_EVENT_STOPPED, tr_time( ) );
}
void
tr_announcerTorrentCompleted( tr_torrent * tor )
{
torrentAddAnnounce( tor, TR_ANNOUNCE_EVENT_COMPLETED, tr_time( ) );
}
void
tr_announcerChangeMyPort( tr_torrent * tor )
{
tr_announcerTorrentStarted( tor );
}
/***
****
***/
void
tr_announcerAddBytes( tr_torrent * tor, int type, uint32_t byteCount )
{
int i;
struct tr_torrent_tiers * tt = tor->tiers;
assert( tr_isTorrent( tor ) );
assert( type==TR_ANN_UP || type==TR_ANN_DOWN || type==TR_ANN_CORRUPT );
for( i=0; i<tt->tier_count; ++i )
tt->tiers[i].byteCounts[ type ] += byteCount;
}
/***
****
***/
static void
letsCheat( const tr_tier * tier,
uint64_t * up,
uint64_t * down,
uint64_t * corrupt,
uint64_t * left,
tr_announce_event * event )
{
tr_cheatMode_t cheatMode = tr_torrentGetCheatMode( tier->tor );
// cheatMode = TR_CHEAT_DEACT; deactivated always, comment out for fun
if(cheatMode == TR_CHEAT_DEACT) // no cheat
{
*up = tier->byteCounts[TR_ANN_UP];
*down = tier->byteCounts[TR_ANN_DOWN];
*corrupt = tier->byteCounts[TR_ANN_CORRUPT];
*left = tr_cpLeftUntilComplete( &tier->tor->completion );
}
else if(cheatMode == TR_CHEAT_ALWLEECH) // always leecher
{
*up = 0;
*down = 0;
*corrupt = 0;
*left = tr_torrentInfo( tier->tor )->totalSize;
if( *event == TR_ANNOUNCE_EVENT_COMPLETED )
{
*event = TR_ANNOUNCE_EVENT_NONE;
}
}
else if(cheatMode == TR_CHEAT_ALWSEED) // always seeder, report real upload
{
*up = tier->byteCounts[TR_ANN_UP];
*down = 0;
*corrupt = 0;
*left = 0;
if( *event == TR_ANNOUNCE_EVENT_COMPLETED )
{
*event = TR_ANNOUNCE_EVENT_NONE;
}
}
else if(cheatMode == TR_CHEAT_2RATIO) // report (download * 1.95 <=> 2.05) upload
{
*up = (int64_t)((1.95+tier->tor->cheatRand)*tier->byteCounts[TR_ANN_DOWN]);
*down = tier->byteCounts[TR_ANN_DOWN];
*corrupt = tier->byteCounts[TR_ANN_CORRUPT];
*left = tr_cpLeftUntilComplete( &tier->tor->completion );
}
else if(cheatMode == TR_CHEAT_4RATIO) // report (download * 3.95 <=> 4.05) upload
{
*up = (int64_t)((3.95+tier->tor->cheatRand)*tier->byteCounts[TR_ANN_DOWN]);
*down = tier->byteCounts[TR_ANN_DOWN];
*corrupt = tier->byteCounts[TR_ANN_CORRUPT];
*left = tr_cpLeftUntilComplete( &tier->tor->completion );
}
}
/***
****
***/
static tr_announce_request *
announce_request_new( const tr_announcer * announcer,
const tr_torrent * tor,
const tr_tier * tier,
tr_announce_event event )
{
tr_announce_request * req = tr_new0( tr_announce_request, 1 );
req->port = tr_sessionGetPublicPeerPort( announcer->session );
req->url = tr_strdup( tier->currentTracker->announce );
req->tracker_id_str = tr_strdup( tier->currentTracker->tracker_id_str );
memcpy( req->info_hash, tor->info.hash, SHA_DIGEST_LENGTH );
memcpy( req->peer_id, tor->peer_id, PEER_ID_LEN );
req->up = tier->byteCounts[TR_ANN_UP];
req->down = tier->byteCounts[TR_ANN_DOWN];
req->corrupt = tier->byteCounts[TR_ANN_CORRUPT];
req->left = tr_cpLeftUntilComplete( &tor->completion );
letsCheat( tier, &req->up, &req->down, &req->corrupt, &req->left, &event );
req->event = event;
req->numwant = event == TR_ANNOUNCE_EVENT_STOPPED ? 0 : NUMWANT;
req->key = announcer->key;
req->partial_seed = tr_cpGetStatus( &tor->completion ) == TR_PARTIAL_SEED;
tier_build_log_name( tier, req->log_name, sizeof( req->log_name ) );
return req;
}
static void announce_request_free( tr_announce_request * req );
void
tr_announcerRemoveTorrent( tr_announcer * announcer, tr_torrent * tor )
{
struct tr_torrent_tiers * tt = tor->tiers;
if( tt != NULL )
{
int i;
for( i=0; i<tt->tier_count; ++i )
{
tr_tier * tier = &tt->tiers[i];
if( tier->isRunning )
{
const tr_announce_event e = TR_ANNOUNCE_EVENT_STOPPED;
tr_announce_request * req = announce_request_new( announcer, tor, tier, e );
if( tr_ptrArrayFindSorted( &announcer->stops, req, compareStops ) != NULL )
announce_request_free( req );
else
tr_ptrArrayInsertSorted( &announcer->stops, req, compareStops );
}
}
tiersFree( tor->tiers );
tor->tiers = NULL;
}
}