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96 lines
2.4 KiB
96 lines
2.4 KiB
17 years ago
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/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
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It is considered beerware. Prost. Skol. Cheers or whatever. */
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/* System */
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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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/* Libowfat */
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#include "byte.h"
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#include "scan.h"
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/* Opentracker */
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#include "ot_accesslist.h"
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/* GLOBAL VARIABLES */
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#ifdef WANT_ACCESS_CONTROL
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static char *accesslist_filename = NULL;
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static ot_vector accesslist;
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static void accesslist_reset( void ) {
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free( accesslist.data );
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byte_zero( &accesslist, sizeof( accesslist ) );
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}
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static int accesslist_addentry( ot_hash *infohash ) {
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int em;
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void *insert = vector_find_or_insert( &accesslist, infohash, OT_HASH_COMPARE_SIZE, OT_HASH_COMPARE_SIZE, &em );
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if( !insert )
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return -1;
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memmove( insert, infohash, OT_HASH_COMPARE_SIZE );
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return 0;
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}
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/* Read initial access list */
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static void accesslist_readfile( int foo ) {
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FILE * accesslist_filehandle;
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ot_hash infohash;
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foo = foo;
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accesslist_filehandle = fopen( accesslist_filename, "r" );
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/* Free accesslist vector in trackerlogic.c*/
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accesslist_reset();
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if( accesslist_filehandle == NULL ) {
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fprintf( stderr, "Warning: Can't open accesslist file: %s (but will try to create it later, if necessary and possible).", accesslist_filename );
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return;
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}
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/* We do ignore anything that is not of the form "^[:xdigit:]{40}[^:xdigit:].*" */
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while( fgets( static_inbuf, sizeof(static_inbuf), accesslist_filehandle ) ) {
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int i;
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for( i=0; i<20; ++i ) {
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int eger = 16 * scan_fromhex( static_inbuf[ 2*i ] ) + scan_fromhex( static_inbuf[ 1 + 2*i ] );
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if( eger < 0 )
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continue;
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infohash[i] = eger;
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}
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if( scan_fromhex( static_inbuf[ 40 ] ) >= 0 )
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continue;
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/* Append accesslist to accesslist vector */
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accesslist_addentry( &infohash );
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}
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fclose( accesslist_filehandle );
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}
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int accesslist_hashisvalid( ot_hash *hash ) {
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int exactmatch;
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binary_search( hash, accesslist.data, accesslist.size, OT_HASH_COMPARE_SIZE, OT_HASH_COMPARE_SIZE, &exactmatch );
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#ifdef WANT_BLACKLISTING
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exactmatch = !exactmatch;
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#endif
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return exactmatch;
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}
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void accesslist_init( char *accesslist_filename_in ) {
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byte_zero( &accesslist, sizeof( accesslist ) );
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/* Passing "0" since read_blacklist_file also is SIGHUP handler */
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if( accesslist_filename_in ) {
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accesslist_filename = accesslist_filename_in;
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accesslist_readfile( 0 );
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signal( SIGHUP, accesslist_readfile );
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}
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}
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#endif
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