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transmission/libtransmission/announcer.c

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/*
* This file Copyright (C) 2009 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 <assert.h>
#include <limits.h>
#include <event.h>
#include <evhttp.h> /* for HTTP_OK */
#include "transmission.h"
#include "announcer.h"
#include "crypto.h"
#include "net.h"
#include "ptrarray.h"
#include "publish.h"
#include "session.h"
#include "tr-dht.h"
#include "torrent.h"
#include "utils.h"
#include "web.h"
#define dbgmsg( tier, ... ) \
if( tr_deepLoggingIsActive( ) ) do { \
char name[128]; \
tr_snprintf( name, sizeof( name ), "[%s--%s]", tr_torrentName( tier->tor ), \
( tier->currentTracker ? tier->currentTracker->host->name : "" ) ); \
tr_deepLog( __FILE__, __LINE__, name, __VA_ARGS__ ); \
} while( 0 )
enum
{
/* unless the tracker says otherwise, rescrape this frequently */
DEFAULT_SCRAPE_INTERVAL_SEC = ( 60 * 15 ),
/* 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 long to wait before a reannounce the first time we get an error */
FIRST_ANNOUNCE_RETRY_INTERVAL_SEC = 30,
/* how long to wait before a rescrape the first time we get an error */
FIRST_SCRAPE_RETRY_INTERVAL_SEC = 120,
/* the length of the 'key' argument passed in tracker requests */
KEYLEN = 8,
/* how many scrapes we allow at one time */
MAX_CONCURRENT_SCRAPES = 96,
/* how many announces we allow at one time */
MAX_CONCURRENT_ANNOUNCES = 96,
/* if a tracker takes more than this long to respond,
* we treat it as nonresponsive */
MAX_TRACKER_RESPONSE_TIME_SECS = ( 60 * 2 ),
/* the value of the 'numwant' argument passed in tracker requests. */
NUMWANT = 200,
/* how long to put slow (nonresponsive) trackers in the penalty box */
SLOW_HOST_PENALTY_SECS = ( 60 * 10 ),
UPKEEP_INTERVAL_SECS = 1
};
/***
****
***/
static int
compareTransfer( int a_uploaded, int a_downloaded,
int b_uploaded, int 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;
}
/***
****
***/
/**
* used by tr_announcer to recognize nonresponsive
* trackers and de-prioritize them
*/
typedef struct
{
char * name;
/* how many seconds it took to get the last tracker response */
int lastResponseInterval;
/* the last time we sent an announce or scrape message */
time_t lastRequestTime;
}
tr_host;
static int
compareHosts( const void * va, const void * vb )
{
const tr_host * a = va;
const tr_host * b = vb;
return strcmp( a->name, b->name );
}
static int
compareHostToName( const void * va, const void * vb )
{
const tr_host * a = va;
return strcmp( a->name, vb );
}
/* format: hostname + ':' + port */
static char *
getHostName( const char * url )
{
int port = 0;
char * host = NULL;
char * ret;
tr_httpParseURL( url, strlen( url ), &host, &port, NULL );
ret = tr_strdup_printf( "%s:%d", ( host ? host : "invalid" ), port );
tr_free( host );
return ret;
}
static tr_host*
hostNew( const char * name )
{
tr_host * host = tr_new0( tr_host, 1 );
host->name = tr_strdup( name );
return host;
}
static void
hostFree( void * vhost )
{
tr_host * host = vhost;
tr_free( host->name );
tr_free( host );
}
/***
****
***/
/**
* Since we can't poll a tr_torrent's fields after it's destroyed,
* we pre-build the "stop" announcement message when a torrent
* is removed from Transmission
*/
struct stop_message
{
tr_host * host;
char * url;
int up;
int down;
};
static void
stopFree( struct stop_message * stop )
{
tr_free( stop->url );
tr_free( stop );
}
static int
compareStops( const void * va, const void * vb )
{
const struct stop_message * a = va;
const struct stop_message * b = vb;
return compareTransfer( a->up, a->down, b->up, b->down);
}
/***
****
***/
/**
* "global" (per-tr_session) fields
*/
typedef struct tr_announcer
{
tr_ptrArray hosts; /* tr_host */
tr_ptrArray stops; /* struct stop_message */
tr_session * session;
struct event * upkeepTimer;
int announceSlotsAvailable;
int scrapeSlotsAvailable;
}
tr_announcer;
tr_bool
tr_announcerHasBacklog( const struct tr_announcer * announcer )
{
return ( announcer->scrapeSlotsAvailable < 1 )
|| ( announcer->announceSlotsAvailable < 1 );
}
static tr_host *
getHost( tr_announcer * announcer, const char * url )
{
char * name = getHostName( url );
tr_host * host;
host = tr_ptrArrayFindSorted( &announcer->hosts, name, compareHostToName );
if( host == NULL )
{
host = hostNew( name );
tr_ptrArrayInsertSorted( &announcer->hosts, host, compareHosts );
}
tr_free( name );
return host;
}
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->hosts = TR_PTR_ARRAY_INIT;
a->stops = TR_PTR_ARRAY_INIT;
a->session = session;
a->announceSlotsAvailable = MAX_CONCURRENT_ANNOUNCES;
a->scrapeSlotsAvailable = MAX_CONCURRENT_SCRAPES;
a->upkeepTimer = tr_new0( struct event, 1 );
evtimer_set( a->upkeepTimer, 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 );
evtimer_del( announcer->upkeepTimer );
tr_free( announcer->upkeepTimer );
announcer->upkeepTimer = NULL;
tr_ptrArrayDestruct( &announcer->stops, NULL );
tr_ptrArrayDestruct( &announcer->hosts, hostFree );
session->announcer = NULL;
tr_free( announcer );
}
/***
****
***/
/* a row in tr_tier's list of trackers */
typedef struct
{
tr_host * host;
char * announce;
char * scrape;
char * tracker_id;
int seederCount;
int leecherCount;
int downloadCount;
int downloaderCount;
/* sent as the "key" argument in tracker requests
* to verify us if our IP address changes.
* This is immutable for the life of the tracker object.
* The +1 is for '\0' */
char key_param[KEYLEN + 1];
}
tr_tracker_item;
static void
generateKeyParam( char * msg, size_t msglen )
{
size_t i;
const char * pool = "abcdefghijklmnopqrstuvwxyz0123456789";
const int poolSize = strlen( pool );
for( i=0; i<msglen; ++i )
*msg++ = pool[tr_cryptoRandInt( poolSize )];
*msg = '\0';
}
static tr_tracker_item*
trackerNew( tr_announcer * announcer,
const char * announce,
const char * scrape )
{
tr_tracker_item * tracker = tr_new0( tr_tracker_item, 1 );
tracker->host = getHost( announcer, announce );
tracker->announce = tr_strdup( announce );
tracker->scrape = tr_strdup( scrape );
generateKeyParam( tracker->key_param, KEYLEN );
tracker->seederCount = -1;
tracker->leecherCount = -1;
tracker->downloadCount = -1;
return tracker;
}
static void
trackerFree( void * vtracker )
{
tr_tracker_item * tracker = vtracker;
tr_free( tracker->tracker_id );
tr_free( tracker->announce );
tr_free( tracker->scrape );
tr_free( tracker );
}
/***
****
***/
struct tr_torrent_tiers;
/**
* A group of trackers in a single tier,
* as per the multitracker spec
*/
typedef struct
{
tr_ptrArray trackers; /* tr_tracker_item */
tr_tracker_item * currentTracker;
tr_torrent * tor;
time_t lastScrapeTime;
time_t lastAnnounceTime;
time_t lastScrapeStartTime;
time_t lastAnnounceStartTime;
tr_bool lastScrapeSucceeded;
tr_bool lastAnnounceSucceeded;
time_t scrapeAt;
time_t manualAnnounceAllowedAt;
time_t announceAt;
const char * announceEvent;
/* unique lookup key */
int key;
int currentTrackerIndex;
int scrapeIntervalSec;
int announceIntervalSec;
int announceMinIntervalSec;
int retryAnnounceIntervalSec;
int retryScrapeIntervalSec;
int lastAnnouncePeerCount;
tr_bool isRunning;
tr_bool isAnnouncing;
tr_bool isScraping;
char lastAnnounceStr[128];
char lastScrapeStr[128];
}
tr_tier;
static tr_tier *
tierNew( tr_torrent * tor )
{
tr_tier * t;
static int nextKey = 1;
const time_t now = tr_time( );
t = tr_new0( tr_tier, 1 );
t->key = nextKey++;
t->trackers = TR_PTR_ARRAY_INIT;
t->currentTracker = NULL;
t->currentTrackerIndex = -1;
t->scrapeIntervalSec = DEFAULT_SCRAPE_INTERVAL_SEC;
t->announceIntervalSec = DEFAULT_ANNOUNCE_INTERVAL_SEC;
t->announceMinIntervalSec = DEFAULT_ANNOUNCE_MIN_INTERVAL_SEC;
t->scrapeAt = now;
t->tor = tor;
return t;
}
static void
tierFree( void * vtier )
{
tr_tier * tier = vtier;
tr_ptrArrayDestruct( &tier->trackers, trackerFree );
tr_free( tier );
}
static void
tierIncrementTracker( tr_tier * tier )
{
/* move our index to the next tracker in the tier */
const int i = ( tier->currentTrackerIndex + 1 )
% tr_ptrArraySize( &tier->trackers );
tier->currentTracker = tr_ptrArrayNth( &tier->trackers, i );
tier->currentTrackerIndex = 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->retryAnnounceIntervalSec = FIRST_ANNOUNCE_RETRY_INTERVAL_SEC;
tier->retryScrapeIntervalSec = FIRST_SCRAPE_RETRY_INTERVAL_SEC;
tier->isAnnouncing = FALSE;
tier->isScraping = FALSE;
tier->lastAnnounceStartTime = 0;
tier->lastScrapeStartTime = 0;
}
static void
tierAddTracker( tr_announcer * announcer,
tr_tier * tier,
const char * announce,
const char * scrape )
{
tr_tracker_item * tracker = trackerNew( announcer, announce, scrape );
tr_ptrArrayAppend( &tier->trackers, tracker );
dbgmsg( tier, "adding tracker %s", announce );
if( !tier->currentTracker )
tierIncrementTracker( tier );
}
/***
****
***/
/*
* per-torrent info.
* this opaque data structure can be found in tr_torrent.tiers
*/
typedef struct tr_torrent_tiers
{
tr_ptrArray tiers;
tr_publisher publisher;
}
tr_torrent_tiers;
static tr_torrent_tiers*
tiersNew( void )
{
tr_torrent_tiers * tiers = tr_new0( tr_torrent_tiers, 1 );
tiers->tiers = TR_PTR_ARRAY_INIT;
tiers->publisher = TR_PUBLISHER_INIT;
return tiers;
}
static void
tiersClear( tr_torrent_tiers * tiers )
{
tr_ptrArrayDestruct( &tiers->tiers, tierFree );
tiers->tiers = TR_PTR_ARRAY_INIT;
}
static void
tiersFree( tr_torrent_tiers * tiers )
{
tr_publisherDestruct( &tiers->publisher );
tr_ptrArrayDestruct( &tiers->tiers, tierFree );
tr_free( tiers );
}
static tr_tier*
getTier( tr_announcer * announcer, int torrentId, int tierId )
{
tr_tier * tier = NULL;
if( announcer )
{
tr_torrent * tor = tr_torrentFindFromId( announcer->session, torrentId );
if( tor && tor->tiers )
{
int i;
tr_ptrArray * tiers = &tor->tiers->tiers;
const int n = tr_ptrArraySize( tiers );
for( i=0; !tier && i<n; ++i )
{
tr_tier * tmp = tr_ptrArrayNth( tiers, i );
if( tmp->key == tierId )
tier = tmp;
}
}
}
return tier;
}
/***
**** PUBLISH
***/
static const tr_tracker_event emptyEvent = { 0, NULL, NULL, 0, 0 };
static void
publishMessage( tr_tier * tier, const char * msg, int type )
{
if( tier && tier->tor && tier->tor->tiers )
{
tr_torrent_tiers * tiers = tier->tor->tiers;
tr_tracker_event event = emptyEvent;
event.messageType = type;
event.text = msg;
tr_publisherPublish( &tiers->publisher, tier, &event );
}
}
static void
publishErrorClear( tr_tier * tier )
{
publishMessage( tier, NULL, TR_TRACKER_ERROR_CLEAR );
}
static void
publishErrorMessageAndStop( tr_tier * tier, const char * msg )
{
tier->isRunning = FALSE;
publishMessage( tier, msg, TR_TRACKER_ERROR );
}
static void
publishWarning( tr_tier * tier, const char * msg )
{
publishMessage( tier, msg, TR_TRACKER_WARNING );
}
static int
publishNewPeers( tr_tier * tier, tr_bool allAreSeeds,
const void * compact, int compactLen )
{
tr_tracker_event e = emptyEvent;
e.messageType = TR_TRACKER_PEERS;
e.allAreSeeds = allAreSeeds;
e.compact = compact;
e.compactLen = compactLen;
if( compactLen )
tr_publisherPublish( &tier->tor->tiers->publisher, tier, &e );
return compactLen / 6;
}
static int
publishNewPeersCompact( tr_tier * tier, tr_bool allAreSeeds,
const void * compact, int compactLen )
{
int i;
const uint8_t *compactWalk;
uint8_t *array, *walk;
const int peerCount = compactLen / 6;
const int arrayLen = peerCount * ( sizeof( tr_address ) + 2 );
tr_address addr;
tr_port port;
addr.type = TR_AF_INET;
memset( &addr.addr, 0, sizeof( addr.addr ) );
array = tr_new( uint8_t, arrayLen );
for ( i=0, walk=array, compactWalk=compact ; i<peerCount ; ++i )
{
memcpy( &addr.addr.addr4, compactWalk, 4 );
memcpy( &port, compactWalk + 4, 2 );
memcpy( walk, &addr, sizeof( addr ) );
memcpy( walk + sizeof( addr ), &port, 2 );
walk += sizeof( tr_address ) + 2;
compactWalk += 6;
}
publishNewPeers( tier, allAreSeeds, array, arrayLen );
tr_free( array );
return peerCount;
}
static int
publishNewPeersCompact6( tr_tier * tier, tr_bool allAreSeeds,
const void * compact, int compactLen )
{
int i;
const uint8_t *compactWalk;
uint8_t *array, *walk;
const int peerCount = compactLen / 18;
const int arrayLen = peerCount * ( sizeof( tr_address ) + 2 );
tr_address addr;
tr_port port;
addr.type = TR_AF_INET6;
memset( &addr.addr, 0, sizeof( addr.addr ) );
array = tr_new( uint8_t, arrayLen );
for ( i = 0, walk = array, compactWalk = compact ; i < peerCount ; ++i )
{
memcpy( &addr.addr.addr6, compactWalk, 16 );
memcpy( &port, compactWalk + 16, 2 );
compactWalk += 18;
memcpy( walk, &addr, sizeof( addr ) );
memcpy( walk + sizeof( addr ), &port, 2 );
walk += sizeof( tr_address ) + 2;
}
publishNewPeers( tier, allAreSeeds, array, arrayLen );
tr_free( array );
return peerCount;
}
static char*
createAnnounceURL( const tr_announcer * announcer,
const tr_torrent * torrent,
const tr_tier * tier,
const char * eventName )
{
const int isStopping = !strcmp( eventName, "stopped" );
const int numwant = isStopping ? 0 : NUMWANT;
const tr_tracker_item * tracker = tier->currentTracker;
const char * ann = tracker->announce;
struct evbuffer * buf = evbuffer_new( );
char * ret;
const unsigned char * ipv6;
evbuffer_add_printf( buf, "%s"
"%c"
"info_hash=%s"
"&peer_id=%s"
"&port=%d"
"&uploaded=%" PRIu64
"&downloaded=%" PRIu64
"&left=%" PRIu64
"&numwant=%d"
"&key=%s"
"&compact=1"
"&supportcrypto=1",
ann,
strchr( ann, '?' ) ? '&' : '?',
torrent->info.hashEscaped,
torrent->peer_id,
tr_sessionGetPeerPort( announcer->session ),
torrent->uploadedCur,
torrent->downloadedCur,
tr_cpLeftUntilComplete( &torrent->completion ),
numwant,
tracker->key_param );
if( torrent->corruptCur )
evbuffer_add_printf( buf, "&corrupt=%" PRIu64, torrent->corruptCur );
if( !isStopping )
evbuffer_add_printf( buf, "&upload_only=%d", tr_torrentIsSeed( torrent ) ? 1 : 0 );
if( announcer->session->encryptionMode == TR_ENCRYPTION_REQUIRED )
evbuffer_add_printf( buf, "&requirecrypto=1" );
if( eventName && *eventName )
evbuffer_add_printf( buf, "&event=%s", eventName );
if( tracker->tracker_id && *tracker->tracker_id )
evbuffer_add_printf( buf, "&trackerid=%s", tracker->tracker_id );
/* There are two incompatible techniques for announcing an IPv6 address.
BEP-7 suggests adding an "ipv6=" parameter to the announce URL,
while OpenTracker requires that peers announce twice, once over IPv4
and once over IPv6.
To be safe, we should do both: add the "ipv6=" parameter and
announce twice. At any rate, we're already computing our IPv6
address (for the LTEP handshake), so this comes for free. */
ipv6 = tr_globalIPv6( );
if( ipv6 ) {
char ipv6_readable[INET6_ADDRSTRLEN];
inet_ntop( AF_INET6, ipv6, ipv6_readable, INET6_ADDRSTRLEN );
evbuffer_add_printf( buf, "&ipv6=");
tr_http_escape( buf, ipv6_readable, strlen(ipv6_readable), TRUE );
}
ret = tr_strndup( EVBUFFER_DATA( buf ), EVBUFFER_LENGTH( buf ) );
evbuffer_free( buf );
dbgmsg( tier, "announce URL is \"%s\"", ret );
return ret;
}
/***
****
***/
static tr_bool
announceURLIsSupported( const char * announce )
{
return ( announce != NULL )
&& ( ( strstr( announce, "http://" ) == announce ) ||
( strstr( announce, "https://" ) == announce ) );
}
static void
addTorrentToTier( tr_announcer * announcer, tr_torrent_tiers * tiers, tr_torrent * tor )
{
int i, n;
const tr_tracker_info ** infos;
const int trackerCount = tor->info.trackerCount;
const tr_tracker_info * trackers = tor->info.trackers;
/* get the trackers that we support... */
infos = tr_new0( const tr_tracker_info*, trackerCount );
for( i=n=0; i<trackerCount; ++i )
if( announceURLIsSupported( trackers[i].announce ) )
infos[n++] = &trackers[i];
/* build our private table of tiers... */
if( n > 0 )
{
int tierIndex = -1;
tr_tier * tier = NULL;
for( i=0; i<n; ++i )
{
const tr_tracker_info * info = infos[i];
if( info->tier != tierIndex )
tier = NULL;
tierIndex = info->tier;
if( tier == NULL ) {
tier = tierNew( tor );
dbgmsg( tier, "adding tier" );
tr_ptrArrayAppend( &tiers->tiers, tier );
}
tierAddTracker( announcer, tier, info->announce, info->scrape );
}
}
tr_free( infos );
}
tr_torrent_tiers *
tr_announcerAddTorrent( tr_announcer * announcer, tr_torrent * tor )
{
tr_torrent_tiers * tiers;
assert( announcer != NULL );
assert( tr_isTorrent( tor ) );
tiers = tiersNew( );
addTorrentToTier( announcer, tiers, tor );
return tiers;
}
void
tr_announcerResetTorrent( tr_announcer * announcer, tr_torrent * tor )
{
if( tor->tiers != NULL )
{
tiersClear( tor->tiers );
addTorrentToTier( announcer, tor->tiers, tor );
if( tor->isRunning )
tr_announcerTorrentStarted( tor );
}
}
tr_publisher_tag
tr_announcerSubscribe( struct tr_torrent_tiers * tiers,
tr_delivery_func func,
void * userData )
{
return tr_publisherSubscribe( &tiers->publisher, func, userData );
}
void
tr_announcerUnsubscribe( struct tr_torrent_tiers * tiers,
tr_publisher_tag tag )
{
if( tiers )
tr_publisherUnsubscribe( &tiers->publisher, tag );
}
static tr_bool
tierCanManualAnnounce( const tr_tier * tier )
{
return tier->isRunning
&& tier->manualAnnounceAllowedAt <= tr_time( );
}
tr_bool
tr_announcerCanManualAnnounce( const tr_torrent * tor )
{
int i;
int n;
const tr_tier ** tiers;
assert( tr_isTorrent( tor ) );
assert( tor->tiers != NULL );
n = tr_ptrArraySize( &tor->tiers->tiers );
tiers = (const tr_tier**) tr_ptrArrayBase( &tor->tiers->tiers );
for( i=0; i<n; ++i )
if( tierCanManualAnnounce( tiers[i] ) )
return TRUE;
return FALSE;
}
time_t
tr_announcerNextManualAnnounce( const tr_torrent * tor )
{
int i;
int n;
const tr_torrent_tiers * tiers;
time_t ret = ~(time_t)0;
assert( tr_isTorrent( tor ) );
tiers = tor->tiers;
n = tr_ptrArraySize( &tiers->tiers );
for( i=0; i<n; ++i ) {
tr_tier * tier = tr_ptrArrayNth( (tr_ptrArray*)&tiers->tiers, i );
if( tier->isRunning )
ret = MIN( ret, tier->manualAnnounceAllowedAt );
}
return ret;
}
static void
tierClearNextAnnounce( tr_tier * tier )
{
tier->announceAt = 0;
tier->announceEvent = NULL;
dbgmsg( tier, "cleared out announceEvent -- no announces pending." );
}
static void
tierSetNextAnnounce( tr_tier * tier, const char * announceEvent, time_t announceAt )
{
assert( tier != NULL );
assert( announceEvent != NULL );
if( !strcmp( announceEvent, "manual" ) && !tierCanManualAnnounce( tier ) )
return;
tier->announceAt = announceAt;
tier->announceEvent = announceEvent;
dbgmsg( tier, "next announce event is \"%s\" in %d seconds\n", announceEvent, (int)difftime(announceAt,time(NULL)) );
}
static void
torrentSetNextAnnounce( tr_torrent * tor, const char * announceEvent, time_t announceAt )
{
int i;
int n;
tr_torrent_tiers * tiers;
assert( tr_isTorrent( tor ) );
tiers = tor->tiers;
n = tr_ptrArraySize( &tiers->tiers );
for( i=0; i<n; ++i )
tierSetNextAnnounce( tr_ptrArrayNth( &tiers->tiers, i ), announceEvent, announceAt );
}
void
tr_announcerManualAnnounce( tr_torrent * tor )
{
torrentSetNextAnnounce( tor, "manual", tr_time( ) );
}
void
tr_announcerTorrentStarted( tr_torrent * tor )
{
torrentSetNextAnnounce( tor, "started", tr_time( ) );
}
void
tr_announcerTorrentStopped( tr_torrent * tor )
{
torrentSetNextAnnounce( tor, "stopped", tr_time( ) );
}
void
tr_announcerTorrentCompleted( tr_torrent * tor )
{
torrentSetNextAnnounce( tor, "completed", tr_time( ) );
}
void
tr_announcerChangeMyPort( tr_torrent * tor )
{
tr_announcerTorrentStarted( tor );
}
void
tr_announcerRemoveTorrent( tr_announcer * announcer, tr_torrent * tor )
{
assert( tr_isTorrent( tor ) );
if( tor->tiers )
{
int i;
const int n = tr_ptrArraySize( &tor->tiers->tiers );
for( i=0; i<n; ++i )
{
tr_tier * tier = tr_ptrArrayNth( &tor->tiers->tiers, i );
if( tier->isRunning )
{
struct stop_message * s = tr_new0( struct stop_message, 1 );
s->up = tor->uploadedCur;
s->down = tor->downloadedCur;
s->url = createAnnounceURL( announcer, tor, tier, "stopped" );
s->host = tier->currentTracker->host;
tr_ptrArrayInsertSorted( &announcer->stops, s, compareStops );
}
}
tiersFree( tor->tiers );
tor->tiers = NULL;
}
}
/* return true if (1) we've tried it recently AND (2) it didn't respond... */
static tr_bool
hostIsNotResponding( const tr_host * host, const time_t now )
{
tr_bool b = ( host->lastRequestTime )
&& ( host->lastRequestTime >= ( now - SLOW_HOST_PENALTY_SECS ) )
&& ( host->lastResponseInterval > MAX_TRACKER_RESPONSE_TIME_SECS );
return b;
}
static tr_bool
tierIsNotResponding( const tr_tier * tier, const time_t now )
{
return !tier->currentTracker
|| hostIsNotResponding( tier->currentTracker->host, now );
}
static int
compareTiers( const void * va, const void * vb )
{
int ret = 0;
tr_bool af, bf;
const tr_tier * a = *(const tr_tier**)va;
const tr_tier * b = *(const tr_tier**)vb;
/* working domains come before non-working */
if( !ret ) {
const time_t now = tr_time( );
af = tierIsNotResponding( a, now );
bf = tierIsNotResponding( b, now );
if( af != bf )
ret = !af ? -1 : 1;
}
/* stops come before starts */
if( !ret ) {
af = a->tor->isRunning;
bf = b->tor->isRunning;
if( af != bf )
ret = af ? 1 : -1;
}
/* upload comes before download */
if( !ret )
ret = compareTransfer( a->tor->uploadedCur, a->tor->downloadedCur,
b->tor->uploadedCur, b->tor->downloadedCur );
/* incomplete comes before complete */
if( !ret ) {
af = a->tor->completeness == TR_LEECH;
bf = b->tor->completeness == TR_LEECH;
if( af != bf )
return af ? -1 : 1;
}
/* private before public */
if( !ret ) {
af = tr_torrentIsPrivate( a->tor );
bf = tr_torrentIsPrivate( b->tor );
if( af != bf )
ret = af ? -1 : 1;
}
return ret;
}
static uint8_t *
parseOldPeers( tr_benc * bePeers, size_t * byteCount )
{
int i;
uint8_t * array, *walk;
const int peerCount = bePeers->val.l.count;
assert( tr_bencIsList( bePeers ) );
array = tr_new( uint8_t, peerCount * ( sizeof( tr_address ) + 2 ) );
for( i = 0, walk = array; i < peerCount; ++i )
{
const char * s;
int64_t itmp;
tr_address addr;
tr_port port;
tr_benc * peer = &bePeers->val.l.vals[i];
if( tr_bencDictFindStr( peer, "ip", &s ) )
if( tr_pton( s, &addr ) == NULL )
continue;
if( !tr_bencDictFindInt( peer, "port", &itmp )
|| itmp < 0
|| itmp > USHRT_MAX )
continue;
memcpy( walk, &addr, sizeof( tr_address ) );
port = htons( itmp );
memcpy( walk + sizeof( tr_address ), &port, 2 );
walk += sizeof( tr_address ) + 2;
}
*byteCount = peerCount * sizeof( tr_address ) + 2;
return array;
}
static tr_bool
parseAnnounceResponse( tr_tier * tier,
const char * response,
size_t responseLen,
tr_bool * gotScrape )
{
tr_benc benc;
tr_bool success = FALSE;
int scrapeFields = 0;
const int bencLoaded = !tr_bencLoad( response, responseLen, &benc, NULL );
dbgmsg( tier, "response len: %d, isBenc: %d", (int)responseLen, (int)bencLoaded );
publishErrorClear( tier );
if( bencLoaded && tr_bencIsDict( &benc ) )
{
int incomplete = -1;
size_t rawlen;
int64_t i;
tr_benc * tmp;
const char * str;
const uint8_t * raw;
success = TRUE;
tier->retryAnnounceIntervalSec = FIRST_ANNOUNCE_RETRY_INTERVAL_SEC;
if( tr_bencDictFindStr( &benc, "failure reason", &str ) )
{
tr_strlcpy( tier->lastAnnounceStr, str,
sizeof( tier->lastAnnounceStr ) );
dbgmsg( tier, "tracker gave \"%s\"", str );
publishMessage( tier, str, TR_TRACKER_ERROR );
success = FALSE;
}
if( tr_bencDictFindStr( &benc, "warning message", &str ) )
{
tr_strlcpy( tier->lastAnnounceStr, str,
sizeof( tier->lastAnnounceStr ) );
dbgmsg( tier, "tracker gave \"%s\"", str );
publishWarning( tier, str );
}
if( tr_bencDictFindInt( &benc, "interval", &i ) )
{
dbgmsg( tier, "setting interval to %d", (int)i );
tier->announceIntervalSec = i;
}
if( tr_bencDictFindInt( &benc, "min interval", &i ) )
{
dbgmsg( tier, "setting min interval to %d", (int)i );
tier->announceMinIntervalSec = i;
}
if( tr_bencDictFindStr( &benc, "tracker id", &str ) )
{
tier->currentTracker->tracker_id = tr_strdup( str );
}
if( tr_bencDictFindInt( &benc, "complete", &i ) )
{
++scrapeFields;
tier->currentTracker->seederCount = i;
}
if( tr_bencDictFindInt( &benc, "incomplete", &i ) )
{
++scrapeFields;
tier->currentTracker->leecherCount = incomplete = i;
}
if( tr_bencDictFindInt( &benc, "downloaded", &i ) )
{
++scrapeFields;
tier->currentTracker->downloadCount = i;
}
if( tr_bencDictFindRaw( &benc, "peers", &raw, &rawlen ) )
{
/* "compact" extension */
const int allAreSeeds = incomplete == 0;
tier->lastAnnouncePeerCount = publishNewPeersCompact( tier, allAreSeeds, raw, rawlen );
}
else if( tr_bencDictFindList( &benc, "peers", &tmp ) )
{
/* original version of peers */
const tr_bool allAreSeeds = incomplete == 0;
size_t byteCount = 0;
uint8_t * array = parseOldPeers( tmp, &byteCount );
tier->lastAnnouncePeerCount = publishNewPeers( tier, allAreSeeds, array, byteCount );
tr_free( array );
}
if( tr_bencDictFindRaw( &benc, "peers6", &raw, &rawlen ) )
{
/* "compact" extension */
const tr_bool allAreSeeds = incomplete == 0;
tier->lastAnnouncePeerCount += publishNewPeersCompact6( tier, allAreSeeds, raw, rawlen );
}
if( tier->lastAnnounceStr[0] == '\0' )
tr_strlcpy( tier->lastAnnounceStr, _( "Success" ),
sizeof( tier->lastAnnounceStr ) );
}
if( bencLoaded )
tr_bencFree( &benc );
*gotScrape = scrapeFields >= 2;
return success;
}
struct announce_data
{
int torrentId;
int tierId;
time_t timeSent;
/** If the request succeeds, the value for tier's "isRunning" flag */
tr_bool isRunningOnSuccess;
};
static void
onAnnounceDone( tr_session * session,
long responseCode,
const void * response,
size_t responseLen,
void * vdata )
{
tr_announcer * announcer = session->announcer;
struct announce_data * data = vdata;
tr_tier * tier = getTier( announcer, data->torrentId, data->tierId );
tr_bool gotScrape = FALSE;
tr_bool success = FALSE;
const time_t now = time ( NULL );
if( announcer && tier )
{
tier->lastAnnouncePeerCount = 0;
if( tier->currentTracker->host )
{
tr_host * host = tier->currentTracker->host;
host->lastRequestTime = data->timeSent;
host->lastResponseInterval = now - data->timeSent;
}
if( responseCode == HTTP_OK )
{
tier->lastAnnounceTime = now;
success = parseAnnounceResponse( tier, response, responseLen, &gotScrape );
dbgmsg( tier, "success is %d", success );
}
else if( responseCode )
{
/* %1$ld - http status code, such as 404
* %2$s - human-readable explanation of the http status code */
char * buf = tr_strdup_printf(
_( "Announce failed: tracker gave HTTP Response Code %1$ld (%2$s)" ),
responseCode,
tr_webGetResponseStr( responseCode ) );
tr_strlcpy( tier->lastAnnounceStr, buf,
sizeof( tier->lastAnnounceStr ) );
tier->lastAnnounceTime = now;
/* if the response is serious, *and* if the response may require
* human intervention, then notify the user... otherwise just log it */
if( responseCode >= 400 )
if( tr_torrentIsPrivate( tier->tor ) || ( tier->tor->info.trackerCount < 2 ) )
publishWarning( tier, buf );
tr_torinf( tier->tor, "%s", buf );
dbgmsg( tier, "%s", buf );
tr_free( buf );
}
else
{
tr_strlcpy( tier->lastAnnounceStr,
_( "tracker did not respond" ),
sizeof( tier->lastAnnounceStr ) );
dbgmsg( tier, "%s", tier->lastAnnounceStr );
}
}
if( tier )
{
tier->isAnnouncing = FALSE;
if( responseCode == 0 )
{
dbgmsg( tier, "No response from tracker... retrying in two minutes." );
tier->manualAnnounceAllowedAt = ~(time_t)0;
tierSetNextAnnounce( tier, tier->announceEvent, now + 120 );
}
else if( 200 <= responseCode && responseCode <= 299 )
{
const int interval = tier->announceIntervalSec;
dbgmsg( tier, "request succeeded. reannouncing in %d seconds", interval );
if( gotScrape )
{
tier->lastScrapeTime = now;
tier->scrapeAt = now + tier->scrapeIntervalSec;
}
tier->manualAnnounceAllowedAt = now + tier->announceMinIntervalSec;
if( strcmp( tier->announceEvent, "stopped" ) == 0 )
tierClearNextAnnounce( tier );
else
tierSetNextAnnounce( tier, "", now + interval );
}
else if( 300 <= responseCode && responseCode <= 399 )
{
/* how did this get here? libcurl handles this */
const int interval = 5;
dbgmsg( tier, "got a redirect. retrying in %d seconds", interval );
tierSetNextAnnounce( tier, tier->announceEvent, now + interval );
tier->manualAnnounceAllowedAt = now + tier->announceMinIntervalSec;
}
else if( 400 <= responseCode && responseCode <= 499 )
{
/* The request could not be understood by the server due to
* malformed syntax. The client SHOULD NOT repeat the
* request without modifications. */
if( tr_torrentIsPrivate( tier->tor ) || ( tier->tor->info.trackerCount < 2 ) )
publishErrorMessageAndStop( tier, _( "Tracker returned a 4xx message" ) );
tier->manualAnnounceAllowedAt = ~(time_t)0;
tierClearNextAnnounce( tier );
}
else if( 500 <= responseCode && responseCode <= 599 )
{
/* Response status codes beginning with the digit "5" indicate
* cases in which the server is aware that it has erred or is
* incapable of performing the request. So we pause a bit and
* try again. */
tier->manualAnnounceAllowedAt = ~(time_t)0;
tierSetNextAnnounce( tier, tier->announceEvent, now + tier->retryAnnounceIntervalSec );
tier->retryAnnounceIntervalSec *= 2;
}
else
{
/* WTF did we get?? */
const int interval = 120;
dbgmsg( tier, "Invalid response from tracker... retrying in two minutes." );
tier->manualAnnounceAllowedAt = ~(time_t)0;
tierSetNextAnnounce( tier, tier->announceEvent, now + interval );
}
tier->lastAnnounceSucceeded = success;
if( success )
tier->isRunning = data->isRunningOnSuccess;
if( !success )
tierIncrementTracker( tier );
}
if( announcer != NULL )
{
++announcer->announceSlotsAvailable;
}
tr_free( data );
}
static const char *
getAnnounceEvent( const tr_tier * tier )
{
const char * event;
assert( tier != NULL );
assert( tier->announceEvent != NULL );
assert( tr_isTorrent( tier->tor ) );
/* BEP 21: "In order to tell the tracker that a peer is a partial seed,
* it MUST send an event=paused parameter in every announce while
* it is a partial seed." */
if( tr_cpGetStatus( &tier->tor->completion ) == TR_PARTIAL_SEED )
return "paused";
event = tier->announceEvent;
if( !strcmp( event, "manual" ) )
return "started";
return event;
}
static void
tierAnnounce( tr_announcer * announcer, tr_tier * tier )
{
char * url;
struct announce_data * data;
const tr_torrent * tor = tier->tor;
const time_t now = tr_time( );
assert( !tier->isAnnouncing );
data = tr_new0( struct announce_data, 1 );
data->torrentId = tr_torrentId( tor );
data->tierId = tier->key;
data->isRunningOnSuccess = tor->isRunning;
data->timeSent = now;
url = createAnnounceURL( announcer, tor, tier, getAnnounceEvent( tier ) );
tier->isAnnouncing = TRUE;
tier->lastAnnounceStartTime = now;
--announcer->announceSlotsAvailable;
tr_webRun( announcer->session, url, NULL, onAnnounceDone, data );
tr_free( url );
}
static tr_bool
parseScrapeResponse( tr_tier * tier,
const char * response,
size_t responseLen,
char * result,
size_t resultlen )
{
tr_bool success = FALSE;
tr_benc benc, *files;
const int bencLoaded = !tr_bencLoad( response, responseLen, &benc, NULL );
if( bencLoaded && tr_bencDictFindDict( &benc, "files", &files ) )
{
const char * key;
tr_benc * val;
int i = 0;
while( tr_bencDictChild( files, i++, &key, &val ))
{
int64_t intVal;
tr_benc * flags;
if( memcmp( tier->tor->info.hash, key, SHA_DIGEST_LENGTH ) )
continue;
success = TRUE;
publishErrorClear( tier );
if( ( tr_bencDictFindInt( val, "complete", &intVal ) ) )
tier->currentTracker->seederCount = intVal;
if( ( tr_bencDictFindInt( val, "incomplete", &intVal ) ) )
tier->currentTracker->leecherCount = intVal;
if( ( tr_bencDictFindInt( val, "downloaded", &intVal ) ) )
tier->currentTracker->downloadCount = intVal;
if( ( tr_bencDictFindInt( val, "downloaders", &intVal ) ) )
tier->currentTracker->downloaderCount = intVal;
if( tr_bencDictFindDict( val, "flags", &flags ) )
if( ( tr_bencDictFindInt( flags, "min_request_interval", &intVal ) ) )
tier->scrapeIntervalSec = intVal;
/* as per ticket #1045, safeguard against trackers returning
* a very low min_request_interval... */
if( tier->scrapeIntervalSec < DEFAULT_SCRAPE_INTERVAL_SEC )
tier->scrapeIntervalSec = DEFAULT_SCRAPE_INTERVAL_SEC;
tr_tordbg( tier->tor,
"Scrape successful. Rescraping in %d seconds.",
tier->scrapeIntervalSec );
tier->retryScrapeIntervalSec = FIRST_SCRAPE_RETRY_INTERVAL_SEC;
}
}
if( bencLoaded )
tr_bencFree( &benc );
if( success )
tr_strlcpy( result, _( "Success" ), resultlen );
else
tr_strlcpy( result, _( "Error parsing response" ), resultlen );
return success;
}
static void
onScrapeDone( tr_session * session,
long responseCode,
const void * response,
size_t responseLen,
void * vdata )
{
tr_bool success = FALSE;
tr_announcer * announcer = session->announcer;
struct announce_data * data = vdata;
tr_tier * tier = getTier( announcer, data->torrentId, data->tierId );
const time_t now = tr_time( );
if( announcer )
++announcer->scrapeSlotsAvailable;
if( announcer && tier )
{
tier->isScraping = FALSE;
tier->lastScrapeTime = now;
if( tier->currentTracker->host )
{
tr_host * host = tier->currentTracker->host;
host->lastRequestTime = data->timeSent;
host->lastResponseInterval = now - data->timeSent;
}
if( 200 <= responseCode && responseCode <= 299 )
{
const int interval = tier->scrapeIntervalSec;
tier->scrapeAt = now + interval;
if( responseCode == HTTP_OK )
success = parseScrapeResponse( tier, response, responseLen,
tier->lastScrapeStr, sizeof( tier->lastScrapeStr ) );
else
tr_snprintf( tier->lastScrapeStr, sizeof( tier->lastScrapeStr ),
_( "tracker gave HTTP Response Code %1$ld (%2$s)" ),
responseCode, tr_webGetResponseStr( responseCode ) );
tr_tordbg( tier->tor, "%s", tier->lastScrapeStr );
}
else if( 300 <= responseCode && responseCode <= 399 )
{
/* this shouldn't happen; libcurl should handle this */
const int interval = 5;
tier->scrapeAt = now + interval;
tr_snprintf( tier->lastScrapeStr, sizeof( tier->lastScrapeStr ),
"Got a redirect. Retrying in %d seconds", interval );
tr_tordbg( tier->tor, "%s", tier->lastScrapeStr );
}
else
{
const int interval = tier->retryScrapeIntervalSec;
tier->retryScrapeIntervalSec *= 2;
/* Don't retry on a 4xx.
* Retry at growing intervals on a 5xx */
if( 400 <= responseCode && responseCode <= 499 )
tier->scrapeAt = 0;
else
tier->scrapeAt = now + interval;
/* %1$ld - http status code, such as 404
* %2$s - human-readable explanation of the http status code */
if( !responseCode )
tr_strlcpy( tier->lastScrapeStr, _( "tracker did not respond" ),
sizeof( tier->lastScrapeStr ) );
else
tr_snprintf( tier->lastScrapeStr, sizeof( tier->lastScrapeStr ),
_( "tracker gave HTTP Response Code %1$ld (%2$s)" ),
responseCode, tr_webGetResponseStr( responseCode ) );
}
tier->lastScrapeSucceeded = success;
}
tr_free( data );
}
static void
tierScrape( tr_announcer * announcer, tr_tier * tier )
{
char * url;
const char * scrape;
struct announce_data * data;
const time_t now = tr_time( );
assert( tier );
assert( !tier->isScraping );
assert( tier->currentTracker != NULL );
assert( tr_isTorrent( tier->tor ) );
data = tr_new0( struct announce_data, 1 );
data->torrentId = tr_torrentId( tier->tor );
data->tierId = tier->key;
scrape = tier->currentTracker->scrape;
url = tr_strdup_printf( "%s%cinfo_hash=%s",
scrape,
strchr( scrape, '?' ) ? '&' : '?',
tier->tor->info.hashEscaped );
tier->isScraping = TRUE;
tier->lastScrapeStartTime = now;
--announcer->scrapeSlotsAvailable;
dbgmsg( tier, "scraping \"%s\"", url );
tr_webRun( announcer->session, url, NULL, onScrapeDone, data );
tr_free( url );
}
static void
flushCloseMessages( tr_announcer * announcer )
{
int i;
const int n = tr_ptrArraySize( &announcer->stops );
for( i=0; i<n; ++i )
{
struct stop_message * stop = tr_ptrArrayNth( &announcer->stops, i );
tr_webRun( announcer->session, stop->url, NULL, NULL, NULL );
stopFree( stop );
}
tr_ptrArrayClear( &announcer->stops );
}
static tr_bool
tierNeedsToAnnounce( const tr_tier * tier, const time_t now )
{
return !tier->isAnnouncing
&& !tier->isScraping
&& ( tier->announceEvent != NULL )
&& ( tier->announceAt <= now );
}
static tr_bool
tierNeedsToScrape( const tr_tier * tier, const time_t now )
{
return !tier->isScraping
&& ( tier->scrapeAt != 0 )
&& ( tier->scrapeAt <= now )
&& ( tier->currentTracker != NULL )
&& ( tier->currentTracker->scrape != NULL );
}
static void
announceMore( tr_announcer * announcer )
{
const tr_bool canAnnounce = announcer->announceSlotsAvailable > 0;
const tr_bool canScrape = announcer->scrapeSlotsAvailable > 0;
tr_torrent * tor = NULL;
const time_t now = tr_time( );
if( announcer->announceSlotsAvailable > 0 )
{
int i;
int n;
tr_ptrArray announceMe = TR_PTR_ARRAY_INIT;
tr_ptrArray scrapeMe = TR_PTR_ARRAY_INIT;
/* build a list of tiers that need to be announced */
while(( tor = tr_torrentNext( announcer->session, tor ))) {
if( tor->tiers ) {
n = tr_ptrArraySize( &tor->tiers->tiers );
for( i=0; i<n; ++i ) {
tr_tier * tier = tr_ptrArrayNth( &tor->tiers->tiers, i );
if( canAnnounce && tierNeedsToAnnounce( tier, now ) )
tr_ptrArrayAppend( &announceMe, tier );
else if( canScrape && tierNeedsToScrape( tier, now ) )
tr_ptrArrayAppend( &scrapeMe, tier );
}
}
}
/* if there are more tiers than slots available, prioritize */
n = tr_ptrArraySize( &announceMe );
if( n > announcer->announceSlotsAvailable )
qsort( tr_ptrArrayBase( &announceMe ), n, sizeof( tr_tier * ), compareTiers );
/* announce some */
n = MIN( tr_ptrArraySize( &announceMe ), announcer->announceSlotsAvailable );
for( i=0; i<n; ++i ) {
tr_tier * tier = tr_ptrArrayNth( &announceMe, i );
dbgmsg( tier, "announcing tier %d of %d", i, n );
tierAnnounce( announcer, tier );
}
/* scrape some */
n = MIN( tr_ptrArraySize( &scrapeMe ), announcer->scrapeSlotsAvailable );
for( i=0; i<n; ++i ) {
tr_tier * tier = tr_ptrArrayNth( &scrapeMe, i );
dbgmsg( tier, "scraping tier %d of %d", (i+1), n );
tierScrape( announcer, tier );
}
#if 0
char timebuf[64];
tr_getLogTimeStr( timebuf, 64 );
fprintf( stderr, "[%s] announce.c has %d requests ready to send (announce: %d, scrape: %d)\n", timebuf, (int)(tr_ptrArraySize(&announceMe)+tr_ptrArraySize(&scrapeMe)), (int)tr_ptrArraySize(&announceMe), (int)tr_ptrArraySize(&scrapeMe) );
#endif
/* cleanup */
tr_ptrArrayDestruct( &scrapeMe, NULL );
tr_ptrArrayDestruct( &announceMe, NULL );
}
tor = NULL;
while(( tor = tr_torrentNext( announcer->session, tor ))) {
if( tor->dhtAnnounceAt <= now ) {
if( tor->isRunning && tr_torrentAllowsDHT(tor) ) {
int rc;
rc = tr_dhtAnnounce(tor, AF_INET, 1);
if(rc == 0)
/* The DHT is not ready yet. Try again soon. */
tor->dhtAnnounceAt = now + 5 + tr_cryptoWeakRandInt( 5 );
else
/* We should announce at least once every 30 minutes. */
tor->dhtAnnounceAt =
now + 25 * 60 + tr_cryptoWeakRandInt( 3 * 60 );
}
}
if( tor->dhtAnnounce6At <= now ) {
if( tor->isRunning && tr_torrentAllowsDHT(tor) ) {
int rc;
rc = tr_dhtAnnounce(tor, AF_INET6, 1);
if(rc == 0)
tor->dhtAnnounce6At = now + 5 + tr_cryptoWeakRandInt( 5 );
else
tor->dhtAnnounce6At =
now + 25 * 60 + tr_cryptoWeakRandInt( 3 * 60 );
}
}
}
}
static void
onUpkeepTimer( int foo UNUSED, short bar UNUSED, void * vannouncer )
{
tr_announcer * announcer = vannouncer;
/* maybe send out some "stopped" messages for closed torrents */
flushCloseMessages( announcer );
/* maybe send out some announcements to trackers */
announceMore( announcer );
/* set up the next timer */
tr_timerAdd( announcer->upkeepTimer, UPKEEP_INTERVAL_SECS, 0 );
}
/***
****
***/
tr_tracker_stat *
tr_announcerStats( const tr_torrent * torrent,
int * setmeTrackerCount )
{
int i;
int n;
int out = 0;
int tierCount;
tr_tracker_stat * ret;
const time_t now = tr_time( );
assert( tr_isTorrent( torrent ) );
/* count the trackers... */
for( i=n=0, tierCount=tr_ptrArraySize( &torrent->tiers->tiers ); i<tierCount; ++i ) {
const tr_tier * tier = tr_ptrArrayNth( &torrent->tiers->tiers, i );
n += tr_ptrArraySize( &tier->trackers );
}
/* alloc the stats */
*setmeTrackerCount = n;
ret = tr_new0( tr_tracker_stat, n );
/* populate the stats */
for( i=0, tierCount=tr_ptrArraySize( &torrent->tiers->tiers ); i<tierCount; ++i )
{
int j;
const tr_tier * tier = tr_ptrArrayNth( &torrent->tiers->tiers, i );
n = tr_ptrArraySize( &tier->trackers );
for( j=0; j<n; ++j )
{
const tr_tracker_item * tracker = tr_ptrArrayNth( (tr_ptrArray*)&tier->trackers, j );
tr_tracker_stat * st = ret + out++;
tr_strlcpy( st->host, tracker->host->name, sizeof( st->host ) );
tr_strlcpy( st->announce, tracker->announce, sizeof( st->announce ) );
st->tier = i + 1;
st->isBackup = tracker != tier->currentTracker;
st->lastScrapeStartTime = tier->lastScrapeStartTime;
st->seederCount = tracker->seederCount;
st->leecherCount = tracker->leecherCount;
st->downloadCount = tracker->downloadCount;
if( st->isBackup )
{
st->scrapeState = TR_TRACKER_INACTIVE;
st->announceState = TR_TRACKER_INACTIVE;
st->nextScrapeTime = 0;
st->nextAnnounceTime = 0;
}
else
{
if(( st->hasScraped = tier->lastScrapeTime != 0 )) {
st->lastScrapeTime = tier->lastScrapeTime;
st->lastScrapeSucceeded = tier->lastScrapeSucceeded;
tr_strlcpy( st->lastScrapeResult, tier->lastScrapeStr, sizeof( st->lastScrapeResult ) );
}
if( tier->isScraping )
st->scrapeState = TR_TRACKER_ACTIVE;
else if( !tier->scrapeAt )
st->scrapeState = TR_TRACKER_INACTIVE;
else if( tier->scrapeAt > now )
{
st->scrapeState = TR_TRACKER_WAITING;
st->nextScrapeTime = tier->scrapeAt;
}
else
st->scrapeState = TR_TRACKER_QUEUED;
st->lastAnnounceStartTime = tier->lastAnnounceStartTime;
if(( st->hasAnnounced = tier->lastAnnounceTime != 0 )) {
st->lastAnnounceTime = tier->lastAnnounceTime;
tr_strlcpy( st->lastAnnounceResult, tier->lastAnnounceStr, sizeof( st->lastAnnounceResult ) );
if(( st->lastAnnounceSucceeded = tier->lastAnnounceSucceeded )) {
st->lastAnnouncePeerCount = tier->lastAnnouncePeerCount;
}
}
if( tier->isAnnouncing )
st->announceState = TR_TRACKER_ACTIVE;
else if( !torrent->isRunning || !tier->announceAt )
st->announceState = TR_TRACKER_INACTIVE;
else if( tier->announceAt > now )
{
st->announceState = TR_TRACKER_WAITING;
st->nextAnnounceTime = tier->announceAt;
}
else
st->announceState = TR_TRACKER_QUEUED;
}
}
}
return ret;
}
void
tr_announcerStatsFree( tr_tracker_stat * trackers,
int trackerCount UNUSED )
{
tr_free( trackers );
}
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