added closed tracker and blacklist code

Makefile

@@ -1,5 +1,5 @@
 CC?=gcc
-CFLAGS+=-I../libowfat -Wall -pipe -Os # -DWANT_IP_FROM_QUERY_STRING -g -ggdb
+CFLAGS+=-I../libowfat -Wall -pipe -Os -DWANT_BLACKLIST -DWANT_CLOSED_TRACKER # -DWANT_IP_FROM_QUERY_STRING -g -ggdb
 LDFLAGS+=-L../libowfat/ -lowfat -s -lm
 
 HEADERS=trackerlogic.h scan_urlencoded_query.h

opentracker.c

@@ -339,14 +339,40 @@ void graceful( int s ) {
   }
 }
 
-int main()
-{
+void usage( char *name ) {
+  fprintf( stderr, "Usage: %s [-i serverip] [-p serverport] [-d serverdirectory]"
+#ifdef WANT_CLOSED_TRACKER
+  " [-o|c]"
+#endif
+  "\n", name );
+  exit(1);
+}
+
+int main( int argc, char **argv ) {
     int s=socket_tcp4();
     unsigned long ip;
-    uint16 port;
+    char *serverip = NULL;
+    char *serverdir = ".";
+    uint16 port = 6969;
 
+    while( 1 ) {
+      switch( getopt(argc,argv,":i:p:d:") ) {
+        case -1: goto allparsed;
+        case 'i': serverip = optarg; break;
+        case 'p': port = (uint16)atol( optarg ); break;
+        case 'd': serverdir = optarg; break;
+#ifdef WANT_CLOSED_TRACKER
+        case 'o': g_closedtracker = 0;
+        case 'c': g_closedtracker = 1;
+#endif
+        default:
+        case '?': usage( argv[0] );
+      }
+    }
+
+allparsed:
     ot_start_time = time( NULL );
-    if (socket_bind4_reuse(s,NULL,6969)==-1)
+    if (socket_bind4_reuse(s,serverip,port)==-1)
         panic("socket_bind4_reuse");
 
     if (socket_listen(s,16)==-1)
@@ -356,7 +382,7 @@ int main()
         panic("io_fd");
 
     signal( SIGINT, graceful );
-    if( init_logic( ) == -1 )
+    if( init_logic( serverdir ) == -1 )
       panic("Logic not started");
 
     io_wantread(s);

trackerlogic.c

@@ -18,10 +18,23 @@
 #include "scan.h"
 #include "byte.h"
 
+#if defined( WANT_CLOSED_TRACKER ) || defined( WANT_BLACKLIST )
+#include <sys/stat.h>
+#endif
+
 // GLOBAL VARIABLES
 //
 static ot_vector all_torrents[256];
 
+#ifdef WANT_CLOSED_TRACKER
+int g_closedtracker = 1;
+static ot_torrent* const OT_TORRENT_NOT_ON_WHITELIST = (ot_torrent*)1;
+#endif
+
+#ifdef WANT_BLACKLIST
+static ot_torrent* const OT_TORRENT_ON_BLACKLIST = (ot_torrent*)2;
+#endif
+
 // 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
@@ -48,7 +61,7 @@ static void *binary_search( const void *key, const void *base, unsigned long mem
 // Converter function from memory to human readable hex strings
 // * definitely not thread safe!!!
 //
-char ths[1+2*20];char*to_hex(ot_byte*s){char*m="0123456789ABCDEF";char*e=ths+40;char*t=ths;while(t<e){*t++=m[*s>>4];*t++=m[*s++&15];}*t=0;return ths;}
+char ths[2+2*20]="-";char*to_hex(ot_byte*s){char*m="0123456789ABCDEF";char*e=ths+41;char*t=ths+1;while(t<e){*t++=m[*s>>4];*t++=m[*s++&15];}*t=0;return ths+1;}
 
 static void *vector_find_or_insert( ot_vector *vector, void *key, size_t member_size, int compare_size, int *exactmatch ) {
   ot_byte *match = BINARY_FIND( key, vector->data, vector->size, member_size, compare_size, exactmatch );
@@ -141,6 +154,20 @@ ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer ) {
   ot_torrent *torrent;
   ot_peer    *peer_dest;
   ot_vector  *torrents_list = &all_torrents[*hash[0]], *peer_pool;
+#if defined( WANT_CLOSED_TRACKER ) || defined( WANT_BLACKLIST )
+  struct stat dummy_sb;
+  char       *fn = to_hex( (ot_byte*)hash );
+#endif
+
+#ifdef WANT_CLOSED_TRACKER
+  if( g_closedtracker && stat( fn, &dummy_sb ) )
+    return OT_TORRENT_NOT_ON_WHITELIST;
+#endif
+
+#ifdef WANT_BLACKLIST
+  if( stat( fn - 1, &dummy_sb ) )
+    return OT_TORRENT_ON_BLACKLIST;
+#endif
 
   torrent = vector_find_or_insert( torrents_list, (void*)hash, sizeof( ot_torrent ), OT_HASH_COMPARE_SIZE, &exactmatch );
   if( !torrent ) return NULL;
@@ -200,6 +227,18 @@ size_t return_peers_for_torrent( ot_torrent *torrent, unsigned long amount, char
   signed   long  pool_offset = -1, pool_index = 0;
   signed   long  wert = -1;
 
+#ifdef WANT_CLOSED_TRACKER
+  if( torrent == OT_TORRENT_NOT_ON_WHITELIST ) {
+    return( FORMAT_FORMAT_STRING( reply, "d14:failure reason43:This torrent is not served by this tracker.e" ) );
+  }
+#endif
+
+#ifdef WANT_BLACKLIST
+  if( torrent == OT_TORRENT_ON_BLACKLIST ) {
+    return( FORMAT_FORMAT_STRING( reply, "d14:failure reason29:This torrent is black listed.e" ) );
+  }
+#endif
+
   for( peer_count=seed_count=index=0; index<OT_POOLS_COUNT; ++index) {
     peer_count += torrent->peer_list->peers[index].size;
     seed_count += torrent->peer_list->seed_count[index];
@@ -260,6 +299,9 @@ void remove_peer_from_torrent( ot_hash *hash, ot_peer *peer ) {
   
   // Maybe this does the job
   if( clean_peerlist( torrent->peer_list ) ) {
+#ifdef WANT_CLOSED_TRACKER
+    if( !g_closedtracker ) 
+#endif
     vector_remove_torrent( torrents_list, hash );
     return;
   }
@@ -276,7 +318,12 @@ void cleanup_torrents( void ) {
 
 }
 
-int init_logic( ) {
+int init_logic( char *serverdir ) {
+  if( serverdir && chdir( serverdir ) ) {
+    fprintf( stderr, "Could not chdir() to %s\n", serverdir );
+    return -1;
+  }
+
   srandom( time(NULL));
 
   // Initialize control structures

trackerlogic.h

@@ -75,9 +75,13 @@ typedef struct {
 // Exported functions
 //
 
-int  init_logic( );
+int  init_logic( char *serverdir );
 void deinit_logic( );
 
+#ifdef WANT_CLOSED_TRACKER
+extern int g_closedtracker;
+#endif
+
 ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer );
 size_t return_peers_for_torrent( ot_torrent *torrent, unsigned long amount, char *reply );
 size_t return_scrape_for_torrent( ot_hash *hash, char *reply );