@ -1,149 +1,33 @@
/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
It is considered beerware . Prost . Skol . Cheers or whatever . */
# include "trackerlogic.h"
/* System */
# include <stdlib.h>
# include <string.h>
# include <stdio.h>
# include <fcntl.h>
# include <sys/types.h>
# include <sys/mman.h>
# include <arpa/inet.h>
# include <unistd.h>
# include <time.h>
# include <math.h>
# include <glob.h>
# include <errno.h>
/* Libowfat */
# include "scan.h"
# include "byte.h"
# include "mutex.h"
/* GLOBAL VARIABLES */
/* Opentracker */
# include "trackerlogic.h"
# include "ot_mutex.h"
# include "ot_stats.h"
# include "ot_clean.h"
/* We maintain a list of 1024 pointers to sorted list of ot_torrent structs
Sort key is , of course , its hash */
# define OT_BUCKET_COUNT 1024
static ot_vector all_torrents [ OT_BUCKET_COUNT ] ;
static ot_time all_torrents_clean [ OT_BUCKET_COUNT ] ;
/* GLOBAL VARIABLES */
# if defined ( WANT_BLACKLISTING ) || defined( WANT_CLOSED_TRACKER )
static ot_vector accesslist ;
# define WANT_ACCESS_CONTROL
# endif
static int clean_single_torrent ( ot_torrent * torrent ) ;
/* these functions protect our buckets from other threads that
try to commit announces or clean up */
static ot_vector * lock_bucket_by_hash ( ot_hash * hash ) {
unsigned char * local_hash = hash [ 0 ] ;
int bucket = ( local_hash [ 0 ] < < 2 ) | ( local_hash [ 1 ] > > 6 ) ;
/* Can block */
mutex_bucket_lock ( bucket ) ;
return all_torrents + bucket ;
}
static void * unlock_bucket_by_hash ( ot_hash * hash ) {
unsigned char * local_hash = hash [ 0 ] ;
int bucket = ( local_hash [ 0 ] < < 2 ) | ( local_hash [ 1 ] > > 6 ) ;
mutex_bucket_unlock ( bucket ) ;
/* To make caller's code look better, allow
return unlock_bucket_by_hash ( ) */
return NULL ;
}
/* Converter function from memory to human readable hex strings */
static char * to_hex ( char * d , ot_byte * s ) { const char * m = " 0123456789ABCDEF " ; char * e = d + 40 ; while ( d < e ) { * d + + = m [ * s > > 4 ] ; * d + + = m [ * s + + & 15 ] ; } * d = 0 ; return d ; }
/* This function gives us a binary search that returns a pointer, even if
no exact match is found . In that case it sets exactmatch 0 and gives
calling functions the chance to insert data
*/
static void * binary_search ( const void * const key , const void * base , const size_t member_count , const size_t member_size ,
size_t compare_size , int * exactmatch ) {
size_t mc = member_count ;
ot_byte * lookat = ( ( ot_byte * ) base ) + member_size * ( member_count > > 1 ) ;
* exactmatch = 1 ;
while ( mc ) {
int cmp = memcmp ( lookat , key , compare_size ) ;
if ( cmp = = 0 ) return ( void * ) lookat ;
if ( cmp < 0 ) {
base = ( void * ) ( lookat + member_size ) ;
- - mc ;
}
mc > > = 1 ;
lookat = ( ( ot_byte * ) base ) + member_size * ( mc > > 1 ) ;
}
* exactmatch = 0 ;
return ( void * ) lookat ;
}
/* This is the generic insert operation for our vector type.
It tries to locate the object at " key " with size " member_size " by comparing its first " compare_size " bytes with
those of objects in vector . Our special " binary_search " function does that and either returns the match or a
pointer to where the object is to be inserted . vector_find_or_insert makes space for the object and copies it ,
if it wasn ' t found in vector . Caller needs to check the passed " exactmatch " variable to see , whether an insert
took place . If resizing the vector failed , NULL is returned , else the pointer to the object in vector .
*/
static void * vector_find_or_insert ( ot_vector * vector , void * key , size_t member_size , size_t compare_size , int * exactmatch ) {
ot_byte * match = binary_search ( key , vector - > data , vector - > size , member_size , compare_size , exactmatch ) ;
if ( * exactmatch ) return match ;
if ( vector - > size + 1 > = vector - > space ) {
size_t new_space = vector - > space ? OT_VECTOR_GROW_RATIO * vector - > space : OT_VECTOR_MIN_MEMBERS ;
ot_byte * new_data = realloc ( vector - > data , new_space * member_size ) ;
if ( ! new_data ) return NULL ;
/* Adjust pointer if it moved by realloc */
match = new_data + ( match - ( ot_byte * ) vector - > data ) ;
vector - > data = new_data ;
vector - > space = new_space ;
}
memmove ( match + member_size , match , ( ( ot_byte * ) vector - > data ) + member_size * vector - > size - match ) ;
vector - > size + + ;
return match ;
}
/* This is the non-generic delete from vector-operation specialized for peers in pools.
Set hysteresis = = 0 if you expect the vector not to ever grow again .
It returns 0 if no peer was found ( and thus not removed )
1 if a non - seeding peer was removed
2 if a seeding peer was removed
*/
static int vector_remove_peer ( ot_vector * vector , ot_peer * peer , int hysteresis ) {
int exactmatch ;
size_t shrink_thresh = hysteresis ? OT_VECTOR_SHRINK_THRESH : OT_VECTOR_SHRINK_RATIO ;
ot_peer * end = ( ( ot_peer * ) vector - > data ) + vector - > size ;
ot_peer * match ;
if ( ! vector - > size ) return 0 ;
match = binary_search ( peer , vector - > data , vector - > size , sizeof ( ot_peer ) , OT_PEER_COMPARE_SIZE , & exactmatch ) ;
if ( ! exactmatch ) return 0 ;
exactmatch = ( OT_FLAG ( match ) & PEER_FLAG_SEEDING ) ? 2 : 1 ;
memmove ( match , match + 1 , sizeof ( ot_peer ) * ( end - match - 1 ) ) ;
if ( ( - - vector - > size * shrink_thresh < vector - > space ) & & ( vector - > space > OT_VECTOR_MIN_MEMBERS ) ) {
vector - > space / = OT_VECTOR_SHRINK_RATIO ;
vector - > data = realloc ( vector - > data , vector - > space * sizeof ( ot_peer ) ) ;
}
if ( ! vector - > size ) {
/* for peer pools its safe to let them go,
in 999 of 1000 this happens in older pools , that won ' t ever grow again */
free ( vector - > data ) ;
vector - > data = NULL ;
vector - > space = 0 ;
}
return exactmatch ;
}
static void free_peerlist ( ot_peerlist * peer_list ) {
void free_peerlist ( ot_peerlist * peer_list ) {
size_t i ;
for ( i = 0 ; i < OT_POOLS_COUNT ; + + i )
if ( peer_list - > peers [ i ] . data )
@ -154,27 +38,11 @@ static void free_peerlist( ot_peerlist *peer_list ) {
free ( peer_list ) ;
}
static void vector_remove_torrent ( ot_vector * vector , ot_torrent * match ) {
ot_torrent * end = ( ( ot_torrent * ) vector - > data ) + vector - > size ;
if ( ! vector - > size ) return ;
/* If this is being called after a unsuccessful malloc() for peer_list
in add_peer_to_torrent , match - > peer_list actually might be NULL */
if ( match - > peer_list ) free_peerlist ( match - > peer_list ) ;
memmove ( match , match + 1 , sizeof ( ot_torrent ) * ( end - match - 1 ) ) ;
if ( ( - - vector - > size * OT_VECTOR_SHRINK_THRESH < vector - > space ) & & ( vector - > space > OT_VECTOR_MIN_MEMBERS ) ) {
vector - > space / = OT_VECTOR_SHRINK_RATIO ;
vector - > data = realloc ( vector - > data , vector - > space * sizeof ( ot_torrent ) ) ;
}
}
ot_torrent * add_peer_to_torrent ( ot_hash * hash , ot_peer * peer WANT_TRACKER_SYNC_PARAM ( int from_changeset ) ) {
int exactmatch ;
ot_torrent * torrent ;
ot_peer * peer_dest ;
ot_vector * torrents_list = lock_bucket _by_hash( hash ) , * peer_pool ;
ot_vector * torrents_list = mutex_bucket_lock_by_hash ( hash ) , * peer_pool ;
int base_pool = 0 ;
# ifdef WANT_ACCESS_CONTROL
@ -184,13 +52,17 @@ ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer WANT_TRACKER_SYNC
exactmatch = ! exactmatch ;
# endif
if ( exactmatch )
return unlock_bucket_by_hash ( hash ) ;
if ( exactmatch ) {
mutex_bucket_unlock_by_hash ( hash ) ;
return NULL ;
}
# endif
torrent = vector_find_or_insert ( torrents_list , ( void * ) hash , sizeof ( ot_torrent ) , OT_HASH_COMPARE_SIZE , & exactmatch ) ;
if ( ! torrent )
return unlock_bucket_by_hash ( hash ) ;
if ( ! torrent ) {
mutex_bucket_unlock_by_hash ( hash ) ;
return NULL ;
}
if ( ! exactmatch ) {
/* Create a new torrent entry, then */
@ -198,7 +70,8 @@ ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer WANT_TRACKER_SYNC
if ( ! ( torrent - > peer_list = malloc ( sizeof ( ot_peerlist ) ) ) ) {
vector_remove_torrent ( torrents_list , torrent ) ;
return unlock_bucket_by_hash ( hash ) ;
mutex_bucket_unlock_by_hash ( hash ) ;
return NULL ;
}
byte_zero ( torrent - > peer_list , sizeof ( ot_peerlist ) ) ;
@ -216,7 +89,7 @@ ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer WANT_TRACKER_SYNC
peer_pool = & torrent - > peer_list - > peers [ 0 ] ;
binary_search ( peer , peer_pool - > data , peer_pool - > size , sizeof ( ot_peer ) , OT_PEER_COMPARE_SIZE , & exactmatch ) ;
if ( exactmatch ) {
unlock_bucket _by_hash( hash ) ;
mutex_bucket_unlock _by_hash( hash ) ;
return torrent ;
}
base_pool = 1 ;
@ -248,7 +121,7 @@ ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer WANT_TRACKER_SYNC
torrent - > peer_list - > seed_count - - ;
case 1 : default :
torrent - > peer_list - > peer_count - - ;
unlock_bucket _by_hash( hash ) ;
mutex_bucket_unlock _by_hash( hash ) ;
return torrent ;
}
}
@ -269,7 +142,7 @@ ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer WANT_TRACKER_SYNC
memmove ( peer_dest , peer , sizeof ( ot_peer ) ) ;
}
unlock_bucket _by_hash( hash ) ;
mutex_bucket_unlock _by_hash( hash ) ;
return torrent ;
}
@ -282,13 +155,13 @@ ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer WANT_TRACKER_SYNC
size_t return_peers_for_torrent ( ot_hash * hash , size_t amount , char * reply , int is_tcp ) {
char * r = reply ;
int exactmatch ;
ot_vector * torrents_list = lock_bucket _by_hash( hash ) ;
ot_vector * torrents_list = mutex_bucket_lock _by_hash( hash ) ;
ot_torrent * torrent = binary_search ( hash , torrents_list - > data , torrents_list - > size , sizeof ( ot_torrent ) , OT_HASH_COMPARE_SIZE , & exactmatch ) ;
ot_peerlist * peer_list = torrent - > peer_list ;
size_t index ;
if ( ! torrent ) {
unlock_bucket _by_hash( hash ) ;
mutex_bucket_unlock _by_hash( hash ) ;
return 0 ;
}
@ -338,12 +211,12 @@ size_t return_peers_for_torrent( ot_hash *hash, size_t amount, char *reply, int
if ( is_tcp )
* r + + = ' e ' ;
unlock_bucket _by_hash( hash ) ;
mutex_bucket_unlock _by_hash( hash ) ;
return r - reply ;
}
/* Release memory we allocated too much */
static void fix_mmapallocation ( void * buf , size_t old_alloc , size_t new_alloc ) {
void fix_mmapallocation ( void * buf , size_t old_alloc , size_t new_alloc ) {
int page_size = getpagesize ( ) ;
size_t old_pages = 1 + old_alloc / page_size ;
size_t new_pages = 1 + new_alloc / page_size ;
@ -356,19 +229,23 @@ static void fix_mmapallocation( void *buf, size_t old_alloc, size_t new_alloc )
size_t return_fullscrape_for_tracker ( char * * reply ) {
size_t torrent_count = 0 , j ;
size_t allocated , replysize ;
int i ;
ot_vector * torrents_list ;
int bucket ;
char * r ;
for ( i = 0 ; i < OT_BUCKET_COUNT ; + + i )
torrent_count + = all_torrents [ i ] . size ;
for ( bucket = 0 ; bucket < OT_BUCKET_COUNT ; + + bucket ) {
ot_vector * torrents_list = mutex_bucket_lock ( bucket ) ;
torrent_count + = torrents_list - > size ;
mutex_bucket_unlock ( bucket ) ;
}
/* one extra for pro- and epilogue */
allocated = 100 * ( 1 + torrent_count ) ;
if ( ! ( r = * reply = mmap ( NULL , allocated , PROT_READ | PROT_WRITE , MAP_ANON | MAP_PRIVATE , - 1 , 0 ) ) ) return 0 ;
memmove ( r , " d5:filesd " , 9 ) ; r + = 9 ;
for ( i= 0 ; i < OT_BUCKET_COUNT ; + + i ) {
ot_vector * torrents_list = all_torrents + i ;
for ( bucket= 0 ; bucket < OT_BUCKET_COUNT ; + + bucket ) {
torrents_list = mutex_bucket_lock ( bucket ) ;
for ( j = 0 ; j < torrents_list - > size ; + + j ) {
ot_peerlist * peer_list = ( ( ( ot_torrent * ) ( torrents_list - > data ) ) [ j ] ) . peer_list ;
ot_hash * hash = & ( ( ( ot_torrent * ) ( torrents_list - > data ) ) [ j ] ) . hash ;
@ -378,6 +255,7 @@ size_t return_fullscrape_for_tracker( char **reply ) {
r + = sprintf ( r , " d8:completei%zde10:downloadedi%zde10:incompletei%zdee " , peer_list - > seed_count , peer_list - > down_count , peer_list - > peer_count - peer_list - > seed_count ) ;
}
}
mutex_bucket_unlock ( bucket ) ;
}
* r + + = ' e ' ; * r + + = ' e ' ;
@ -388,45 +266,10 @@ size_t return_fullscrape_for_tracker( char **reply ) {
return replysize ;
}
size_t return_memstat_for_tracker ( char * * reply ) {
size_t torrent_count = 0 , j ;
size_t allocated , replysize ;
int i , k ;
char * r ;
for ( i = 0 ; i < OT_BUCKET_COUNT ; + + i ) {
ot_vector * torrents_list = all_torrents + i ;
torrent_count + = torrents_list - > size ;
}
allocated = OT_BUCKET_COUNT * 32 + ( 43 + OT_POOLS_COUNT * 32 ) * torrent_count ;
if ( ! ( r = * reply = mmap ( NULL , allocated , PROT_READ | PROT_WRITE , MAP_ANON | MAP_PRIVATE , - 1 , 0 ) ) ) return 0 ;
for ( i = 0 ; i < OT_BUCKET_COUNT ; + + i )
r + = sprintf ( r , " %02X: %08X %08X \n " , i , ( unsigned int ) all_torrents [ i ] . size , ( unsigned int ) all_torrents [ i ] . space ) ;
for ( i = 0 ; i < OT_BUCKET_COUNT ; + + i ) {
ot_vector * torrents_list = all_torrents + i ;
char hex_out [ 42 ] ;
for ( j = 0 ; j < torrents_list - > size ; + + j ) {
ot_peerlist * peer_list = ( ( ( ot_torrent * ) ( torrents_list - > data ) ) [ j ] ) . peer_list ;
ot_hash * hash = & ( ( ( ot_torrent * ) ( torrents_list - > data ) ) [ j ] ) . hash ;
r + = sprintf ( r , " \n %s: \n " , to_hex ( hex_out , ( ot_byte * ) hash ) ) ;
for ( k = 0 ; k < OT_POOLS_COUNT ; + + k )
r + = sprintf ( r , " \t %05X %05X \n " , ( ( unsigned int ) peer_list - > peers [ k ] . size ) , ( unsigned int ) peer_list - > peers [ k ] . space ) ;
}
}
replysize = ( r - * reply ) ;
fix_mmapallocation ( * reply , allocated , replysize ) ;
return replysize ;
}
/* Fetches scrape info for a specific torrent */
size_t return_udp_scrape_for_torrent ( ot_hash * hash , char * reply ) {
int exactmatch ;
ot_vector * torrents_list = lock_bucket _by_hash( hash ) ;
ot_vector * torrents_list = mutex_bucket_lock_by_hash ( hash ) ;
ot_torrent * torrent = binary_search ( hash , torrents_list - > data , torrents_list - > size , sizeof ( ot_torrent ) , OT_HASH_COMPARE_SIZE , & exactmatch ) ;
if ( ! exactmatch ) {
@ -443,7 +286,7 @@ size_t return_udp_scrape_for_torrent( ot_hash *hash, char *reply ) {
r [ 2 ] = htonl ( torrent - > peer_list - > peer_count - torrent - > peer_list - > seed_count ) ;
}
}
unlock_bucket _by_hash( hash ) ;
mutex_bucket_unlock _by_hash( hash ) ;
return 12 ;
}
@ -456,7 +299,7 @@ size_t return_tcp_scrape_for_torrent( ot_hash *hash_list, int amount, char *repl
for ( i = 0 ; i < amount ; + + i ) {
ot_hash * hash = hash_list + i ;
ot_vector * torrents_list = lock_bucket _by_hash( hash ) ;
ot_vector * torrents_list = mutex_bucket_lock _by_hash( hash ) ;
ot_torrent * torrent = binary_search ( hash , torrents_list - > data , torrents_list - > size , sizeof ( ot_torrent ) , OT_HASH_COMPARE_SIZE , & exactmatch ) ;
if ( exactmatch ) {
@ -468,347 +311,22 @@ size_t return_tcp_scrape_for_torrent( ot_hash *hash_list, int amount, char *repl
torrent - > peer_list - > seed_count , torrent - > peer_list - > down_count , torrent - > peer_list - > peer_count - torrent - > peer_list - > seed_count ) + 23 ;
}
}
unlock_bucket _by_hash( hash ) ;
mutex_bucket_unlock _by_hash( hash ) ;
}
* r + + = ' e ' ; * r + + = ' e ' ;
return r - reply ;
}
# ifdef WANT_TRACKER_SYNC
/* Import Changeset from an external authority
format : d4 : syncd [ . . ] ee
[ . . ] : ( 20 : 01234567 890 abcdefghij16 : XXXXYYYY ) +
*/
int add_changeset_to_tracker ( ot_byte * data , size_t len ) {
ot_hash * hash ;
ot_byte * end = data + len ;
unsigned long peer_count ;
/* We do know, that the string is \n terminated, so it cant
overflow */
if ( byte_diff ( data , 8 , " d4:syncd " ) ) return - 1 ;
data + = 8 ;
while ( 1 ) {
if ( byte_diff ( data , 3 , " 20: " ) ) {
if ( byte_diff ( data , 2 , " ee " ) )
return - 1 ;
return 0 ;
}
data + = 3 ;
hash = ( ot_hash * ) data ;
data + = sizeof ( ot_hash ) ;
/* Scan string length indicator */
data + = ( len = scan_ulong ( ( char * ) data , & peer_count ) ) ;
/* If no long was scanned, it is not divisible by 8, it is not
followed by a colon or claims to need to much memory , we fail */
if ( ! len | | ! peer_count | | ( peer_count & 7 ) | | ( * data + + ! = ' : ' ) | | ( data + peer_count > end ) )
return - 1 ;
while ( peer_count > 0 ) {
add_peer_to_torrent ( hash , ( ot_peer * ) data , 1 ) ;
data + = 8 ; peer_count - = 8 ;
}
}
return 0 ;
}
/* Proposed output format
d4 : syncd20 : < info_hash > 8 * N : ( xxxxyyyy ) * Nee
*/
size_t return_changeset_for_tracker ( char * * reply ) {
size_t allocated = 0 , i , replysize ;
int bucket ;
char * r ;
/* Maybe there is time to clean_all_torrents(); */
/* Determine space needed for whole changeset */
for ( bucket = 0 ; bucket < OT_BUCKET_COUNT ; + + bucket ) {
ot_vector * torrents_list = all_torrents + bucket ;
for ( i = 0 ; i < torrents_list - > size ; + + i ) {
ot_torrent * torrent = ( ( ot_torrent * ) ( torrents_list - > data ) ) + i ;
allocated + = sizeof ( ot_hash ) + sizeof ( ot_peer ) * torrent - > peer_list - > changeset . size + 13 ;
}
}
/* add "d4:syncd" and "ee" */
allocated + = 8 + 2 ;
if ( ! ( r = * reply = mmap ( NULL , allocated , PROT_READ | PROT_WRITE , MAP_ANON | MAP_PRIVATE , - 1 , 0 ) ) )
return 0 ;
memmove ( r , " d4:syncd " , 8 ) ; r + = 8 ;
for ( bucket = 0 ; bucket < OT_BUCKET_COUNT ; + + bucket ) {
ot_vector * torrents_list = all_torrents + bucket ;
for ( i = 0 ; i < torrents_list - > size ; + + i ) {
ot_torrent * torrent = ( ( ot_torrent * ) ( torrents_list - > data ) ) + i ;
const size_t byte_count = sizeof ( ot_peer ) * torrent - > peer_list - > changeset . size ;
* r + + = ' 2 ' ; * r + + = ' 0 ' ; * r + + = ' : ' ;
memmove ( r , torrent - > hash , sizeof ( ot_hash ) ) ; r + = sizeof ( ot_hash ) ;
r + = sprintf ( r , " %zd: " , byte_count ) ;
memmove ( r , torrent - > peer_list - > changeset . data , byte_count ) ; r + = byte_count ;
}
}
* r + + = ' e ' ; * r + + = ' e ' ;
replysize = ( r - * reply ) ;
fix_mmapallocation ( * reply , allocated , replysize ) ;
return replysize ;
}
# endif
/* Clean a single torrent
return 1 if torrent timed out
*/
static int clean_single_torrent ( ot_torrent * torrent ) {
ot_peerlist * peer_list = torrent - > peer_list ;
size_t peers_count = 0 , seeds_count ;
time_t timedout = ( int ) ( NOW - peer_list - > base ) ;
int i ;
# ifdef WANT_TRACKER_SYNC
char * new_peers ;
# endif
/* Torrent has idled out */
if ( timedout > OT_TORRENT_TIMEOUT )
return 1 ;
/* Nothing to be cleaned here? Test if torrent is worth keeping */
if ( timedout > OT_POOLS_COUNT ) {
if ( ! peer_list - > peer_count )
return peer_list - > down_count ? 0 : 1 ;
timedout = OT_POOLS_COUNT ;
}
/* Release vectors that have timed out */
for ( i = OT_POOLS_COUNT - timedout ; i < OT_POOLS_COUNT ; + + i )
free ( peer_list - > peers [ i ] . data ) ;
/* Shift vectors back by the amount of pools that were shifted out */
memmove ( peer_list - > peers + timedout , peer_list - > peers , sizeof ( ot_vector ) * ( OT_POOLS_COUNT - timedout ) ) ;
byte_zero ( peer_list - > peers , sizeof ( ot_vector ) * timedout ) ;
/* Shift back seed counts as well */
memmove ( peer_list - > seed_counts + timedout , peer_list - > seed_counts , sizeof ( size_t ) * ( OT_POOLS_COUNT - timedout ) ) ;
byte_zero ( peer_list - > seed_counts , sizeof ( size_t ) * timedout ) ;
# ifdef WANT_TRACKER_SYNC
/* Save the block modified within last OT_POOLS_TIMEOUT */
if ( peer_list - > peers [ 1 ] . size & &
( new_peers = realloc ( peer_list - > changeset . data , sizeof ( ot_peer ) * peer_list - > peers [ 1 ] . size ) ) )
{
memmove ( new_peers , peer_list - > peers [ 1 ] . data , peer_list - > peers [ 1 ] . size ) ;
peer_list - > changeset . data = new_peers ;
peer_list - > changeset . size = sizeof ( ot_peer ) * peer_list - > peers [ 1 ] . size ;
} else {
free ( peer_list - > changeset . data ) ;
memset ( & peer_list - > changeset , 0 , sizeof ( ot_vector ) ) ;
}
# endif
peers_count = seeds_count = 0 ;
for ( i = 0 ; i < OT_POOLS_COUNT ; + + i ) {
peers_count + = peer_list - > peers [ i ] . size ;
seeds_count + = peer_list - > seed_counts [ i ] ;
}
peer_list - > seed_count = seeds_count ;
peer_list - > peer_count = peers_count ;
if ( peers_count )
peer_list - > base = NOW ;
else {
/* When we got here, the last time that torrent
has been touched is OT_POOLS_COUNT units before */
peer_list - > base = NOW - OT_POOLS_COUNT ;
}
return 0 ;
}
/* Clean up all peers in current bucket, remove timedout pools and
torrents */
void clean_all_torrents ( void ) {
ot_vector * torrents_list ;
size_t i ;
static int bucket ;
ot_time time_now = NOW ;
/* Search for an uncleaned bucked */
while ( ( all_torrents_clean [ bucket ] = = time_now ) & & ( + + bucket < OT_BUCKET_COUNT ) ) ;
if ( bucket > = OT_BUCKET_COUNT ) {
bucket = 0 ; return ;
}
all_torrents_clean [ bucket ] = time_now ;
mutex_bucket_lock ( bucket ) ;
torrents_list = all_torrents + bucket ;
for ( i = 0 ; i < torrents_list - > size ; + + i ) {
ot_torrent * torrent = ( ( ot_torrent * ) ( torrents_list - > data ) ) + i ;
if ( clean_single_torrent ( torrent ) ) {
vector_remove_torrent ( torrents_list , torrent ) ;
- - i ; continue ;
}
}
mutex_bucket_unlock ( bucket ) ;
}
typedef struct { size_t val ; ot_torrent * torrent ; } ot_record ;
/* Fetches stats from tracker */
size_t return_stats_for_tracker ( char * reply , int mode ) {
size_t torrent_count = 0 , peer_count = 0 , seed_count = 0 , j ;
ot_record top5s [ 5 ] , top5c [ 5 ] ;
char * r = reply ;
int bucket ;
byte_zero ( top5s , sizeof ( top5s ) ) ;
byte_zero ( top5c , sizeof ( top5c ) ) ;
for ( bucket = 0 ; bucket < OT_BUCKET_COUNT ; + + bucket ) {
ot_vector * torrents_list = all_torrents + bucket ;
mutex_bucket_lock ( bucket ) ;
torrent_count + = torrents_list - > size ;
for ( j = 0 ; j < torrents_list - > size ; + + j ) {
ot_peerlist * peer_list = ( ( ( ot_torrent * ) ( torrents_list - > data ) ) [ j ] ) . peer_list ;
if ( mode = = STATS_TOP5 ) {
int idx = 4 ; while ( ( idx > = 0 ) & & ( peer_list - > peer_count > top5c [ idx ] . val ) ) - - idx ;
if ( idx + + ! = 4 ) {
memmove ( top5c + idx + 1 , top5c + idx , ( 4 - idx ) * sizeof ( ot_record ) ) ;
top5c [ idx ] . val = peer_list - > peer_count ;
top5c [ idx ] . torrent = ( ot_torrent * ) ( torrents_list - > data ) + j ;
}
idx = 4 ; while ( ( idx > = 0 ) & & ( peer_list - > seed_count > top5s [ idx ] . val ) ) - - idx ;
if ( idx + + ! = 4 ) {
memmove ( top5s + idx + 1 , top5s + idx , ( 4 - idx ) * sizeof ( ot_record ) ) ;
top5s [ idx ] . val = peer_list - > seed_count ;
top5s [ idx ] . torrent = ( ot_torrent * ) ( torrents_list - > data ) + j ;
}
}
peer_count + = peer_list - > peer_count ; seed_count + = peer_list - > seed_count ;
}
mutex_bucket_unlock ( bucket ) ;
}
if ( mode = = STATS_TOP5 ) {
char hex_out [ 42 ] ;
int idx ;
r + = sprintf ( r , " Top5 torrents by peers: \n " ) ;
for ( idx = 0 ; idx < 5 ; + + idx )
if ( top5c [ idx ] . torrent )
r + = sprintf ( r , " \t %zd \t %s \n " , top5c [ idx ] . val , to_hex ( hex_out , top5c [ idx ] . torrent - > hash ) ) ;
r + = sprintf ( r , " Top5 torrents by seeds: \n " ) ;
for ( idx = 0 ; idx < 5 ; + + idx )
if ( top5s [ idx ] . torrent )
r + = sprintf ( r , " \t %zd \t %s \n " , top5s [ idx ] . val , to_hex ( hex_out , top5s [ idx ] . torrent - > hash ) ) ;
} else
r + = sprintf ( r , " %zd \n %zd \n opentracker serving %zd torrents \n opentracker " , peer_count , seed_count , torrent_count ) ;
return r - reply ;
}
/* This function collects 4096 /24s in 4096 possible
malloc blocks
*/
size_t return_stats_for_slash24s ( char * reply , size_t amount , ot_dword thresh ) {
# define NUM_TOPBITS 12
# define NUM_LOWBITS (24-NUM_TOPBITS)
# define NUM_BUFS (1<<NUM_TOPBITS)
# define NUM_S24S (1<<NUM_LOWBITS)
# define MSK_S24S (NUM_S24S-1)
ot_dword * counts [ NUM_BUFS ] ;
ot_dword slash24s [ amount * 2 ] ; /* first dword amount, second dword subnet */
int bucket ;
size_t i , j , k , l ;
char * r = reply ;
byte_zero ( counts , sizeof ( counts ) ) ;
byte_zero ( slash24s , amount * 2 * sizeof ( ot_dword ) ) ;
r + = sprintf ( r , " Stats for all /24s with more than %u announced torrents: \n \n " , thresh ) ;
for ( bucket = 0 ; bucket < OT_BUCKET_COUNT ; + + bucket ) {
ot_vector * torrents_list = all_torrents + bucket ;
mutex_bucket_lock ( bucket ) ;
for ( j = 0 ; j < torrents_list - > size ; + + j ) {
ot_peerlist * peer_list = ( ( ( ot_torrent * ) ( torrents_list - > data ) ) [ j ] ) . peer_list ;
for ( k = 0 ; k < OT_POOLS_COUNT ; + + k ) {
ot_peer * peers = peer_list - > peers [ k ] . data ;
size_t numpeers = peer_list - > peers [ k ] . size ;
for ( l = 0 ; l < numpeers ; + + l ) {
ot_dword s24 = ntohl ( * ( ot_dword * ) ( peers + l ) ) > > 8 ;
ot_dword * count = counts [ s24 > > NUM_LOWBITS ] ;
if ( ! count ) {
count = malloc ( sizeof ( ot_dword ) * NUM_S24S ) ;
if ( ! count )
goto bailout_cleanup ;
byte_zero ( count , sizeof ( ot_dword ) * NUM_S24S ) ;
counts [ s24 > > NUM_LOWBITS ] = count ;
}
count [ s24 & MSK_S24S ] + + ;
}
}
}
mutex_bucket_unlock ( bucket ) ;
}
k = l = 0 ; /* Debug: count allocated bufs */
for ( i = 0 ; i < NUM_BUFS ; + + i ) {
ot_dword * count = counts [ i ] ;
if ( ! counts [ i ] )
continue ;
+ + k ; /* Debug: count allocated bufs */
for ( j = 0 ; j < NUM_S24S ; + + j ) {
if ( count [ j ] > thresh ) {
/* This subnet seems to announce more torrents than the last in our list */
int insert_pos = amount - 1 ;
while ( ( insert_pos > = 0 ) & & ( count [ j ] > slash24s [ 2 * insert_pos ] ) )
- - insert_pos ;
+ + insert_pos ;
memmove ( slash24s + 2 * ( insert_pos + 1 ) , slash24s + 2 * ( insert_pos ) , 2 * sizeof ( ot_dword ) * ( amount - insert_pos - 1 ) ) ;
slash24s [ 2 * insert_pos ] = count [ j ] ;
slash24s [ 2 * insert_pos + 1 ] = ( i < < NUM_TOPBITS ) + j ;
if ( slash24s [ 2 * amount - 2 ] > thresh )
thresh = slash24s [ 2 * amount - 2 ] ;
}
if ( count [ j ] ) + + l ;
}
free ( count ) ;
}
r + = sprintf ( r , " Allocated bufs: %zd, used s24s: %zd \n " , k , l ) ;
for ( i = 0 ; i < amount ; + + i )
if ( slash24s [ 2 * i ] > = thresh ) {
ot_dword ip = slash24s [ 2 * i + 1 ] ;
r + = sprintf ( r , " % 10ld %d.%d.%d.0/24 \n " , ( long ) slash24s [ 2 * i ] , ( int ) ( ip > > 16 ) , ( int ) ( 255 & ( ip > > 8 ) ) , ( int ) ( ip & 255 ) ) ;
}
return r - reply ;
bailout_cleanup :
for ( i = 0 ; i < NUM_BUFS ; + + i )
free ( counts [ i ] ) ;
return 0 ;
}
size_t remove_peer_from_torrent ( ot_hash * hash , ot_peer * peer , char * reply , int is_tcp ) {
int exactmatch ;
size_t index ;
ot_vector * torrents_list = lock_bucket _by_hash( hash ) ;
ot_vector * torrents_list = mutex_bucket_lock_by_hash ( hash ) ;
ot_torrent * torrent = binary_search ( hash , torrents_list - > data , torrents_list - > size , sizeof ( ot_torrent ) , OT_HASH_COMPARE_SIZE , & exactmatch ) ;
ot_peerlist * peer_list ;
if ( ! exactmatch ) {
unlock_bucket _by_hash( hash ) ;
mutex_bucket_unlock_by_hash ( hash ) ;
if ( is_tcp )
return sprintf ( reply , " d8:completei0e10:incompletei0e8:intervali%ie5:peers0:e " , OT_CLIENT_REQUEST_INTERVAL_RANDOM ) ;
@ -835,7 +353,7 @@ exit_loop:
if ( is_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 ) ;
unlock_bucket _by_hash( hash ) ;
mutex_bucket_unlock _by_hash( hash ) ;
return reply_size ;
}
@ -844,7 +362,7 @@ exit_loop:
( ( ot_dword * ) reply ) [ 3 ] = peer_list - > peer_count - peer_list - > seed_count ;
( ( ot_dword * ) reply ) [ 4 ] = peer_list - > seed_count ;
unlock_bucket _by_hash( hash ) ;
mutex_bucket_unlock _by_hash( hash ) ;
return ( size_t ) 20 ;
}
@ -875,29 +393,27 @@ int trackerlogic_init( const char * const serverdir ) {
srandom ( time ( NULL ) ) ;
/* Initialize control structures */
byte_zero ( all_torrents , sizeof ( all_torrents ) ) ;
clean_init ( ) ;
mutex_init ( ) ;
return 0 ;
}
void trackerlogic_deinit ( void ) {
int i ;
int bucket ;
size_t j ;
/* Free all torrents... */
for ( i = 0 ; i < OT_BUCKET_COUNT ; + + i ) {
if ( all_torrents [ i ] . size ) {
ot_torrent * torrents_list = ( ot_torrent * ) all_torrents [ i ] . data ;
for ( j = 0 ; j < all_torrents [ i ] . size ; + + j )
free_peerlist ( torrents_list [ j ] . peer_list ) ;
free ( all_torrents [ i ] . data ) ;
for ( bucket = 0 ; bucket < OT_BUCKET_COUNT ; + + bucket ) {
ot_vector * torrents_list = mutex_bucket_lock ( bucket ) ;
if ( torrents_list - > size ) {
for ( j = 0 ; j < torrents_list - > size ; + + j ) {
ot_torrent * torrent = ( ( ot_torrent * ) ( torrents_list - > data ) ) + j ;
free_peerlist ( torrent - > peer_list ) ;
}
free ( torrents_list - > data ) ;
}
}
byte_zero ( all_torrents , sizeof ( all_torrents ) ) ;
byte_zero ( all_torrents_clean , sizeof ( all_torrents_clean ) ) ;
mutex_deinit ( ) ;
clean_deinit ( ) ;
}
erdgeist
17 years ago