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@ -7,17 +7,12 @@
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <sys/uio.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include <time.h>
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#include <math.h>
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#include <errno.h>
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#include <stdint.h>
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/* Libowfat */
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#include "scan.h"
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#include "byte.h"
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#include "io.h"
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@ -28,26 +23,26 @@
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#include "ot_clean.h"
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#include "ot_accesslist.h"
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#include "ot_fullscrape.h"
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#include "ot_sync.h"
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#include "ot_livesync.h"
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void free_peerlist( ot_peerlist *peer_list ) {
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size_t i;
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for( i=0; i<OT_POOLS_COUNT; ++i )
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if( peer_list->peers[i].data )
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free( peer_list->peers[i].data );
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#ifdef WANT_SYNC_BATCH
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free( peer_list->changeset.data );
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#endif
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if( peer_list->peers.data ) {
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if( OT_PEERLIST_HASBUCKETS( peer_list ) ) {
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ot_vector *bucket_list = (ot_vector*)(peer_list->peers.data);
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while( peer_list->peers.size-- )
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free( bucket_list++->data );
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}
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free( peer_list->peers.data );
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}
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free( peer_list );
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}
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ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer WANT_SYNC_PARAM( int from_changeset ) ) {
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ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer WANT_SYNC_PARAM( int from_sync ) ) {
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int exactmatch;
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ot_torrent *torrent;
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ot_peer *peer_dest;
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ot_vector *torrents_list = mutex_bucket_lock_by_hash( hash ), *peer_pool;
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int base_pool = 0;
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ot_vector *torrents_list = mutex_bucket_lock_by_hash( hash );
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if( !accesslist_hashisvalid( hash ) ) {
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mutex_bucket_unlock_by_hash( hash );
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@ -75,106 +70,135 @@ ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer WANT_SYNC_PARAM(
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clean_single_torrent( torrent );
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/* Timestamp our first pool */
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torrent->peer_list->base = NOW;
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torrent->peer_list->base = g_now_minutes;
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/* Check for peer in torrent */
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peer_dest = vector_find_or_insert_peer( &(torrent->peer_list->peers), peer, &exactmatch );
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if( !peer_dest ) {
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mutex_bucket_unlock_by_hash( hash );
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return NULL;
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}
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/* Tell peer that it's fresh */
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OT_PEERTIME( peer ) = 0;
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/* Sanitize flags: Whoever claims to have completed download, must be a seeder */
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if( ( OT_FLAG( peer ) & ( PEER_FLAG_COMPLETED | PEER_FLAG_SEEDING ) ) == PEER_FLAG_COMPLETED )
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OT_FLAG( peer ) ^= PEER_FLAG_COMPLETED;
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#ifdef WANT_SYNC
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if( from_changeset ) {
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/* Check, whether peer already is in current pool, do nothing if so */
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peer_pool = &torrent->peer_list->peers[0];
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binary_search( peer, peer_pool->data, peer_pool->size, sizeof(ot_peer), OT_PEER_COMPARE_SIZE, &exactmatch );
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if( exactmatch ) {
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mutex_bucket_unlock_by_hash( hash );
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return torrent;
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}
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base_pool = 1;
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if( torrent->peer_list->base < NOW )
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torrent->peer_list->base = NOW;
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}
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#endif
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peer_pool = &torrent->peer_list->peers[ base_pool ];
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peer_dest = vector_find_or_insert( peer_pool, (void*)peer, sizeof( ot_peer ), OT_PEER_COMPARE_SIZE, &exactmatch );
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/* If we hadn't had a match in current pool, create peer there and
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remove it from all older pools */
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/* If we hadn't had a match create peer there */
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if( !exactmatch ) {
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int i;
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memmove( peer_dest, peer, sizeof( ot_peer ) );
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torrent->peer_list->peer_count++;
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#ifdef WANT_SYNC_LIVE
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if( !from_changeset )
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livesync_tell( hash, peer, PEER_FLAG_LEECHING );
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if( !from_sync )
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livesync_tell( hash, peer );
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#endif
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if( OT_FLAG( peer ) & PEER_FLAG_COMPLETED )
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torrent->peer_list->peer_count++;
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if( OT_FLAG(peer) & PEER_FLAG_COMPLETED )
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torrent->peer_list->down_count++;
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if( OT_FLAG(peer) & PEER_FLAG_SEEDING ) {
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torrent->peer_list->seed_counts[ base_pool ]++;
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if( OT_FLAG(peer) & PEER_FLAG_SEEDING )
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torrent->peer_list->seed_count++;
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}
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for( i= base_pool + 1; i<OT_POOLS_COUNT; ++i ) {
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switch( vector_remove_peer( &torrent->peer_list->peers[i], peer, 0 ) ) {
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case 0: continue;
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case 2: torrent->peer_list->seed_counts[i]--;
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torrent->peer_list->seed_count--;
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case 1: default:
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torrent->peer_list->peer_count--;
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mutex_bucket_unlock_by_hash( hash );
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stats_issue_event( EVENT_RENEW, 0, i );
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return torrent;
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}
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}
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} else {
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if( (OT_FLAG(peer_dest) & PEER_FLAG_SEEDING ) && !(OT_FLAG(peer) & PEER_FLAG_SEEDING ) ) {
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torrent->peer_list->seed_counts[ base_pool ]--;
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stats_issue_event( EVENT_RENEW, 0, OT_PEERTIME( peer_dest ) );
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if( (OT_FLAG(peer_dest) & PEER_FLAG_SEEDING ) && !(OT_FLAG(peer) & PEER_FLAG_SEEDING ) )
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torrent->peer_list->seed_count--;
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}
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if( !(OT_FLAG(peer_dest) & PEER_FLAG_SEEDING ) && (OT_FLAG(peer) & PEER_FLAG_SEEDING ) ) {
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torrent->peer_list->seed_counts[ base_pool ]++;
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if( !(OT_FLAG(peer_dest) & PEER_FLAG_SEEDING ) && (OT_FLAG(peer) & PEER_FLAG_SEEDING ) )
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torrent->peer_list->seed_count++;
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}
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if( !(OT_FLAG( peer_dest ) & PEER_FLAG_COMPLETED ) && (OT_FLAG( peer ) & PEER_FLAG_COMPLETED ) )
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if( !(OT_FLAG(peer_dest) & PEER_FLAG_COMPLETED ) && (OT_FLAG(peer) & PEER_FLAG_COMPLETED ) )
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torrent->peer_list->down_count++;
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if( OT_FLAG( peer_dest ) & PEER_FLAG_COMPLETED )
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if( OT_FLAG(peer_dest) & PEER_FLAG_COMPLETED )
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OT_FLAG( peer ) |= PEER_FLAG_COMPLETED;
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stats_issue_event( EVENT_RENEW, 0, base_pool );
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memmove( peer_dest, peer, sizeof( ot_peer ) );
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}
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mutex_bucket_unlock_by_hash( hash );
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*(uint64_t*)(peer_dest) = *(uint64_t*)(peer);
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#ifdef WANT_SYNC
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/* In order to avoid an unlock/lock between add_peers and return_peers,
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we only unlock the bucket if return_peers won't do the job: either
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if we return NULL or if no reply is expected, i.e. when called
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from livesync code. */
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if( from_sync )
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mutex_bucket_unlock_by_hash( hash );
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#endif
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return torrent;
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}
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static size_t return_peers_all( ot_peerlist *peer_list, char *reply ) {
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unsigned int bucket, num_buckets = 1;
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ot_vector * bucket_list = &peer_list->peers;
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char * r = reply;
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if( OT_PEERLIST_HASBUCKETS(peer_list) ) {
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num_buckets = bucket_list->size;
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bucket_list = (ot_vector *)bucket_list->data;
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}
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for( bucket = 0; bucket<num_buckets; ++bucket ) {
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ot_peer * peers = (ot_peer*)bucket_list[bucket].data;
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size_t peer_count = bucket_list[bucket].size;
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while( peer_count-- )
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memmove( r+=6, peers++, 6 );
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}
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return r - reply;
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}
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static size_t return_peers_selection( ot_peerlist *peer_list, size_t amount, char *reply ) {
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unsigned int bucket_offset, bucket_index = 0, num_buckets = 1;
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ot_vector * bucket_list = &peer_list->peers;
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unsigned int shifted_pc = peer_list->peer_count;
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unsigned int shifted_step = 0;
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unsigned int shift = 0;
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char * r = reply;
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if( OT_PEERLIST_HASBUCKETS(peer_list) ) {
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num_buckets = bucket_list->size;
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bucket_list = (ot_vector *)bucket_list->data;
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}
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/* Make fixpoint arithmetic as exact as possible */
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#define MAXPRECBIT (1<<(8*sizeof(int)-3))
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while( !(shifted_pc & MAXPRECBIT ) ) { shifted_pc <<= 1; shift++; }
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shifted_step = shifted_pc/amount;
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#undef MAXPRECBIT
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/* Initialize somewhere in the middle of peers so that
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fixpoint's aliasing doesn't alway miss the same peers */
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bucket_offset = random() % peer_list->peer_count;
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while( amount-- ) {
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/* This is the aliased, non shifted range, next value may fall into */
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unsigned int diff = ( ( ( amount + 1 ) * shifted_step ) >> shift ) -
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( ( amount * shifted_step ) >> shift );
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bucket_offset += 1 + random() % diff;
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while( bucket_offset >= bucket_list[bucket_index].size ) {
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bucket_offset -= bucket_list[bucket_index].size;
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bucket_index = ( bucket_index + 1 ) % num_buckets;
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}
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memmove( r, ((ot_peer*)bucket_list[bucket_index].data) + bucket_offset, 6 );
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r += 6;
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}
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return r - reply;
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}
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/* Compiles a list of random peers for a torrent
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* reply must have enough space to hold 92+6*amount bytes
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* Selector function can be anything, maybe test for seeds, etc.
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* RANDOM may return huge values
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* does not yet check not to return self
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* the bucket, torrent resides in has been locked by the
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add_peer call, the ot_torrent * was gathered from, so we
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have to unlock it here.
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*/
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size_t return_peers_for_torrent( ot_hash *hash, size_t amount, char *reply, PROTO_FLAG proto ) {
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char *r = reply;
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int exactmatch;
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ot_vector *torrents_list = mutex_bucket_lock_by_hash( hash );
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ot_torrent *torrent = binary_search( hash, torrents_list->data, torrents_list->size, sizeof( ot_torrent ), OT_HASH_COMPARE_SIZE, &exactmatch );
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size_t return_peers_for_torrent( ot_torrent *torrent, size_t amount, char *reply, PROTO_FLAG proto ) {
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ot_peerlist *peer_list = torrent->peer_list;
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size_t index;
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if( !torrent ) {
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mutex_bucket_unlock_by_hash( hash );
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return 0;
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}
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char *r = reply;
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if( peer_list->peer_count < amount )
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if( amount > peer_list->peer_count )
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amount = peer_list->peer_count;
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if( proto == FLAG_TCP )
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r += sprintf( r, "d8:completei%zde10:downloadedi%zde10:incompletei%zde8:intervali%ie5:peers%zd:", peer_list->seed_count, peer_list->down_count, peer_list->peer_count-peer_list->seed_count, OT_CLIENT_REQUEST_INTERVAL_RANDOM, 6*amount );
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else {
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@ -185,40 +209,16 @@ size_t return_peers_for_torrent( ot_hash *hash, size_t amount, char *reply, PROT
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}
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if( amount ) {
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unsigned int pool_offset, pool_index = 0;;
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unsigned int shifted_pc = peer_list->peer_count;
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unsigned int shifted_step = 0;
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unsigned int shift = 0;
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/* Make fixpoint arithmetic as exact as possible */
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#define MAXPRECBIT (1<<(8*sizeof(int)-3))
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while( !(shifted_pc & MAXPRECBIT ) ) { shifted_pc <<= 1; shift++; }
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shifted_step = shifted_pc/amount;
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#undef MAXPRECBIT
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/* Initialize somewhere in the middle of peers so that
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fixpoint's aliasing doesn't alway miss the same peers */
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pool_offset = random() % peer_list->peer_count;
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for( index = 0; index < amount; ++index ) {
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/* This is the aliased, non shifted range, next value may fall into */
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unsigned int diff = ( ( ( index + 1 ) * shifted_step ) >> shift ) -
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( ( index * shifted_step ) >> shift );
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pool_offset += 1 + random() % diff;
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while( pool_offset >= peer_list->peers[pool_index].size ) {
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pool_offset -= peer_list->peers[pool_index].size;
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pool_index = ( pool_index + 1 ) % OT_POOLS_COUNT;
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}
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memmove( r, ((ot_peer*)peer_list->peers[pool_index].data) + pool_offset, 6 );
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r += 6;
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}
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if( amount == peer_list->peer_count )
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r += return_peers_all( peer_list, r );
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else
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r += return_peers_selection( peer_list, amount, r );
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}
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if( proto == FLAG_TCP )
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*r++ = 'e';
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mutex_bucket_unlock_by_hash( hash );
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mutex_bucket_unlock_by_hash( &torrent->hash );
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return r - reply;
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}
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@ -274,64 +274,43 @@ size_t return_tcp_scrape_for_torrent( ot_hash *hash_list, int amount, char *repl
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return r - reply;
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}
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static ot_peerlist dummy_list;
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size_t remove_peer_from_torrent( ot_hash *hash, ot_peer *peer, char *reply, PROTO_FLAG proto ) {
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int exactmatch;
|
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|
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|
size_t index;
|
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|
size_t reply_size = 0;
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|
ot_vector *torrents_list = mutex_bucket_lock_by_hash( hash );
|
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|
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|
ot_torrent *torrent = binary_search( hash, torrents_list->data, torrents_list->size, sizeof( ot_torrent ), OT_HASH_COMPARE_SIZE, &exactmatch );
|
|
|
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|
ot_peerlist *peer_list;
|
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|
ot_peerlist *peer_list = &dummy_list;
|
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|
|
#ifdef WANT_SYNC_LIVE
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|
|
|
if( proto != FLAG_MCA )
|
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|
livesync_tell( hash, peer, PEER_FLAG_STOPPED );
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|
#endif
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|
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|
if( !exactmatch ) {
|
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|
|
|
mutex_bucket_unlock_by_hash( hash );
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|
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|
|
if( proto == FLAG_TCP )
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|
return sprintf( reply, "d8:completei0e10:incompletei0e8:intervali%ie5:peers0:e", OT_CLIENT_REQUEST_INTERVAL_RANDOM );
|
|
|
|
|
|
|
|
|
|
/* Create fake packet to satisfy parser on the other end */
|
|
|
|
|
if( proto == FLAG_UDP ) {
|
|
|
|
|
((uint32_t*)reply)[2] = htonl( OT_CLIENT_REQUEST_INTERVAL_RANDOM );
|
|
|
|
|
((uint32_t*)reply)[3] = ((uint32_t*)reply)[4] = 0;
|
|
|
|
|
return (size_t)20;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if( proto == FLAG_MCA )
|
|
|
|
|
return 0;
|
|
|
|
|
if( proto != FLAG_MCA ) {
|
|
|
|
|
OT_FLAG( peer ) |= PEER_FLAG_STOPPED;
|
|
|
|
|
livesync_tell( hash, peer );
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
peer_list = torrent->peer_list;
|
|
|
|
|
for( index = 0; index<OT_POOLS_COUNT; ++index ) {
|
|
|
|
|
switch( vector_remove_peer( &peer_list->peers[index], peer, index == 0 ) ) {
|
|
|
|
|
case 0: continue;
|
|
|
|
|
case 2: peer_list->seed_counts[index]--;
|
|
|
|
|
peer_list->seed_count--;
|
|
|
|
|
case 1: default:
|
|
|
|
|
peer_list->peer_count--;
|
|
|
|
|
goto exit_loop;
|
|
|
|
|
if( exactmatch ) {
|
|
|
|
|
peer_list = torrent->peer_list;
|
|
|
|
|
switch( vector_remove_peer( &peer_list->peers, peer ) ) {
|
|
|
|
|
case 2: peer_list->seed_count--; /* Fall throughs intended */
|
|
|
|
|
case 1: peer_list->peer_count--; /* Fall throughs intended */
|
|
|
|
|
default: break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
exit_loop:
|
|
|
|
|
|
|
|
|
|
if( proto == FLAG_TCP ) {
|
|
|
|
|
size_t reply_size = sprintf( reply, "d8:completei%zde10:incompletei%zde8:intervali%ie5:peers0:e", peer_list->seed_count, peer_list->peer_count - peer_list->seed_count, OT_CLIENT_REQUEST_INTERVAL_RANDOM );
|
|
|
|
|
mutex_bucket_unlock_by_hash( hash );
|
|
|
|
|
return reply_size;
|
|
|
|
|
}
|
|
|
|
|
if( proto == FLAG_TCP )
|
|
|
|
|
reply_size = sprintf( reply, "d8:completei%zde10:incompletei%zde8:intervali%ie5:peers0:e", peer_list->seed_count, peer_list->peer_count - peer_list->seed_count, OT_CLIENT_REQUEST_INTERVAL_RANDOM );
|
|
|
|
|
|
|
|
|
|
/* Handle UDP reply */
|
|
|
|
|
if( proto == FLAG_UDP ) {
|
|
|
|
|
((uint32_t*)reply)[2] = htonl( OT_CLIENT_REQUEST_INTERVAL_RANDOM );
|
|
|
|
|
((uint32_t*)reply)[3] = htonl( peer_list->peer_count - peer_list->seed_count );
|
|
|
|
|
((uint32_t*)reply)[4] = htonl( peer_list->seed_count);
|
|
|
|
|
reply_size = 20;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
mutex_bucket_unlock_by_hash( hash );
|
|
|
|
|
return (size_t)20;
|
|
|
|
|
return reply_size;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void exerr( char * message ) {
|
|
|
|
|
@ -354,7 +333,6 @@ int trackerlogic_init( const char * const serverdir ) {
|
|
|
|
|
fullscrape_init( );
|
|
|
|
|
accesslist_init( );
|
|
|
|
|
livesync_init( );
|
|
|
|
|
sync_init( );
|
|
|
|
|
stats_init( );
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
@ -366,7 +344,6 @@ void trackerlogic_deinit( void ) {
|
|
|
|
|
|
|
|
|
|
/* Deinitialise background worker threads */
|
|
|
|
|
stats_deinit( );
|
|
|
|
|
sync_deinit( );
|
|
|
|
|
livesync_init( );
|
|
|
|
|
accesslist_init( );
|
|
|
|
|
fullscrape_deinit( );
|
|
|
|
|
|
erdgeist
16 years ago