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96 lines
2.5 KiB
96 lines
2.5 KiB
/* 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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#include <signal.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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