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@ -23,37 +23,25 @@
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/* GLOBAL VARIABLES */
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#ifdef WANT_ACCESSLIST
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char *g_accesslist_filename;
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static ot_vector accesslist;
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char *g_accesslist_filename;
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static ot_hash *g_accesslist;
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static size_t g_accesslist_size;
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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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static int vector_compare_hash(const void *hash1, const void *hash2 ) {
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return memcmp( hash1, hash2, OT_HASH_COMPARE_SIZE );
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}
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void accesslist_deinit( void ) {
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accesslist_reset( );
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}
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static int accesslist_addentry( ot_vector *al, ot_hash infohash ) {
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int eger;
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void *insert = vector_find_or_insert( al, infohash, OT_HASH_COMPARE_SIZE, OT_HASH_COMPARE_SIZE, &eger );
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if( !insert )
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return -1;
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memcpy( insert, infohash, OT_HASH_COMPARE_SIZE );
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return 0;
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free( g_accesslist );
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g_accesslist = 0;
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g_accesslist_size = 0;
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}
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/* Read initial access list */
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static void accesslist_readfile( int sig ) {
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ot_hash infohash;
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ot_vector accesslist_tmp;
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void *olddata;
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char *map, *map_end, *read_offs;
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size_t maplen;
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ot_hash *info_hash, *accesslist_new = NULL, *accesslist_old;
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char *map, *map_end, *read_offs;
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size_t maplen;
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if( sig != SIGHUP ) return;
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@ -64,10 +52,15 @@ static void accesslist_readfile( int sig ) {
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return;
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}
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/* Initialise an empty accesslist vector */
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memset( &accesslist_tmp, 0, sizeof(accesslist_tmp));
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/* No use */
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/* You need at least 41 bytes to pass an info_hash, make enough room
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for the maximum amount of them */
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info_hash = accesslist_new = malloc( ( maplen / 41 ) * 20 );
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if( !accesslist_new ) {
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fprintf( stderr, "Warning: Not enough memory to allocate %zd bytes for accesslist buffer. May succeed later.\n", ( maplen / 41 ) * 20 );
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return;
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}
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/* No use to scan if there's not enough room for another full info_hash */
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map_end = map + maplen - 40;
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read_offs = map;
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@ -78,45 +71,45 @@ static void accesslist_readfile( int sig ) {
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int eger = 16 * scan_fromhex( read_offs[ 2*i ] ) + scan_fromhex( read_offs[ 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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(*info_hash)[i] = eger;
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}
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read_offs += 40;
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/* Append accesslist to accesslist vector */
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if( scan_fromhex( *read_offs ) < 0 )
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accesslist_addentry( &accesslist_tmp, infohash );
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++info_hash;
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/* Find start of next line */
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while( read_offs < map_end && *(read_offs++) != '\n' );
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}
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#ifdef _DEBUG
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fprintf( stderr, "Added %zd info_hashes to accesslist\n", accesslist_tmp.size );
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#endif
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//#ifdef _DEBUG
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fprintf( stderr, "Added %d info_hashes to accesslist\n", info_hash - accesslist_new );
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//#endif
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mmap_unmap( map, maplen);
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qsort( accesslist_new, info_hash - accesslist_new, sizeof( *info_hash ), vector_compare_hash );
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/* Now exchange the accesslist vector in the least race condition prone way */
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accesslist.size = 0;
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olddata = accesslist.data;
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memcpy( &accesslist, &accesslist_tmp, sizeof( &accesslist_tmp ));
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free( olddata );
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g_accesslist_size = 0;
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accesslist_old = g_accesslist;
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g_accesslist = accesslist_new;
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g_accesslist_size = info_hash - accesslist_new;
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free( accesslist_old );
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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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void *exactmatch = bsearch( hash, g_accesslist, g_accesslist_size, OT_HASH_COMPARE_SIZE, vector_compare_hash );
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#ifdef WANT_ACCESSLIST_BLACK
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exactmatch = !exactmatch;
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return exactmatch == NULL;
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#else
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return exactmatch != NULL;
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#endif
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return exactmatch;
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}
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void accesslist_init( ) {
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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( g_accesslist_filename ) {
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accesslist_readfile( SIGHUP );
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