An open and free bittorrent tracker https://erdgeist.org/gitweb/opentracker
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/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
It is considered beerware. Prost. Skol. Cheers or whatever.
$id$ */
/* System */
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
/* Libowfat */
#include "byte.h"
#include "scan.h"
#include "ip6.h"
/* Opentracker */
#include "trackerlogic.h"
#include "ot_accesslist.h"
#include "ot_vector.h"
/* GLOBAL VARIABLES */
#ifdef WANT_ACCESSLIST
char *g_accesslist_filename = NULL;
static ot_vector accesslist;
static void accesslist_reset( void ) {
free( accesslist.data );
byte_zero( &accesslist, sizeof( accesslist ) );
}
void accesslist_deinit( void ) {
accesslist_reset( );
}
static int accesslist_addentry( ot_hash infohash ) {
int eger;
void *insert = vector_find_or_insert( &accesslist, infohash, OT_HASH_COMPARE_SIZE, OT_HASH_COMPARE_SIZE, &eger );
if( !insert )
return -1;
memcpy( insert, infohash, OT_HASH_COMPARE_SIZE );
return 0;
}
/* Read initial access list */
static void accesslist_readfile( int foo ) {
FILE * accesslist_filehandle;
ot_hash infohash;
char inbuf[512];
foo = foo;
accesslist_filehandle = fopen( g_accesslist_filename, "r" );
/* Free accesslist vector in trackerlogic.c*/
accesslist_reset();
if( accesslist_filehandle == NULL ) {
fprintf( stderr, "Warning: Can't open accesslist file: %s (but will try to create it later, if necessary and possible).", g_accesslist_filename );
return;
}
/* We do ignore anything that is not of the form "^[:xdigit:]{40}[^:xdigit:].*" */
while( fgets( inbuf, sizeof(inbuf), accesslist_filehandle ) ) {
int i;
for( i=0; i<(int)sizeof(ot_hash); ++i ) {
int eger = 16 * scan_fromhex( inbuf[ 2*i ] ) + scan_fromhex( inbuf[ 1 + 2*i ] );
if( eger < 0 )
continue;
infohash[i] = eger;
}
if( scan_fromhex( inbuf[ 40 ] ) >= 0 )
continue;
/* Append accesslist to accesslist vector */
accesslist_addentry( infohash );
}
fclose( accesslist_filehandle );
}
int accesslist_hashisvalid( ot_hash hash ) {
int exactmatch;
binary_search( hash, accesslist.data, accesslist.size, OT_HASH_COMPARE_SIZE, OT_HASH_COMPARE_SIZE, &exactmatch );
#ifdef WANT_ACCESSLIST_BLACK
exactmatch = !exactmatch;
#endif
return exactmatch;
}
void accesslist_init( ) {
byte_zero( &accesslist, sizeof( accesslist ) );
/* Passing "0" since read_blacklist_file also is SIGHUP handler */
if( g_accesslist_filename ) {
accesslist_readfile( 0 );
signal( SIGHUP, accesslist_readfile );
}
}
#endif
static ot_ip6 g_adminip_addresses[OT_ADMINIP_MAX];
static ot_permissions g_adminip_permissions[OT_ADMINIP_MAX];
static unsigned int g_adminip_count = 0;
int accesslist_blessip( ot_ip6 ip, ot_permissions permissions ) {
if( g_adminip_count >= OT_ADMINIP_MAX )
return -1;
memcpy(g_adminip_addresses + g_adminip_count,ip,sizeof(ot_ip6));
g_adminip_permissions[ g_adminip_count++ ] = permissions;
#ifdef _DEBUG
{
char _debug[512];
int off = snprintf( _debug, sizeof(_debug), "Blessing ip address " );
off += fmt_ip6(_debug+off, ip );
if( permissions & OT_PERMISSION_MAY_STAT ) off += snprintf( _debug+off, 512-off, " may_fetch_stats" );
if( permissions & OT_PERMISSION_MAY_LIVESYNC ) off += snprintf( _debug+off, 512-off, " may_sync_live" );
if( permissions & OT_PERMISSION_MAY_FULLSCRAPE ) off += snprintf( _debug+off, 512-off, " may_fetch_fullscrapes" );
if( !permissions ) off += snprintf( _debug+off, sizeof(_debug)-off, " nothing\n" );
_debug[off++] = '.';
write( 2, _debug, off );
}
#endif
return 0;
}
int accesslist_isblessed( ot_ip6 ip, ot_permissions permissions ) {
unsigned int i;
for( i=0; i<g_adminip_count; ++i )
if( !memcmp( g_adminip_addresses + i, ip, sizeof(ot_ip6)) && ( g_adminip_permissions[ i ] & permissions ) )
return 1;
return 0;
}
const char *g_version_accesslist_c = "$Source: /home/cvsroot/opentracker/ot_accesslist.c,v $: $Revision: 1.14 $\n";