6 files changed, 135 insertions, 96 deletions

diff --git a/Makefile b/Makefile
index 9422087..ec1b1ad 100644
--- a/Makefile
+++ b/Makefile
@@ -1,13 +1,18 @@
 CC?=gcc
-FEATURES=#-DWANT_TRACKER_SYNC -DWANT_BLACKLISTING -DWANT_CLOSED_TRACKER -DWANT_UTORRENT1600_WORKAROUND #-DWANT_IP_FROM_QUERY_STRING -D_DEBUG_HTTPERROR
+#FEATURES =-DWANT_TRACKER_SYNC
+#FEATURES+=-DWANT_BLACKLISTING
+#FEATURES+=-DWANT_CLOSED_TRACKER
+#FEATURES+=-DWANT_UTORRENT1600_WORKAROUND
+#FEATURES+=-DWANT_IP_FROM_QUERY_STRING
+#FEATURES+=-D_DEBUG_HTTPERROR
 OPTS_debug=-g -ggdb #-pg # -fprofile-arcs -ftest-coverage
 OPTS_production=-Os
 CFLAGS+=-I../libowfat -Wall -pipe -Wextra #-pedantic -ansi
 LDFLAGS+=-L../libowfat/ -lowfat
  
 BINARY =opentracker
-HEADERS=trackerlogic.h scan_urlencoded_query.h ot_mutex.h ot_stats.h ot_sync.h ot_vector.h ot_clean.h ot_udp.h ot_iovec.h ot_fullscrape.h
-SOURCES=opentracker.c trackerlogic.c scan_urlencoded_query.c ot_mutex.c ot_stats.c ot_sync.c ot_vector.c ot_clean.c ot_udp.c ot_iovec.c ot_fullscrape.c
+HEADERS=trackerlogic.h scan_urlencoded_query.h ot_mutex.h ot_stats.h ot_sync.h ot_vector.h ot_clean.h ot_udp.h ot_iovec.h ot_fullscrape.h ot_accesslist.h
+SOURCES=opentracker.c trackerlogic.c scan_urlencoded_query.c ot_mutex.c ot_stats.c ot_sync.c ot_vector.c ot_clean.c ot_udp.c ot_iovec.c ot_fullscrape.c ot_accesslist.c
 
 OBJECTS = $(SOURCES:%.c=%.o)
 OBJECTS_debug = $(SOURCES:%.c=%.debug.o)
diff --git a/opentracker.c b/opentracker.c
index 15f4871..3c2aab7 100644
--- a/opentracker.c
+++ b/opentracker.c
@@ -38,6 +38,7 @@
 #include "ot_udp.h"
 #include "ot_fullscrape.h"
 #include "ot_iovec.h"
+#include "ot_accesslist.h"
 
 /* Globals */
 static const size_t SUCCESS_HTTP_HEADER_LENGTH = 80;
@@ -47,14 +48,6 @@ static unsigned int g_adminip_count = 0;
 time_t ot_start_time;
 time_t g_now;
 
-#if defined ( WANT_BLACKLISTING ) && defined (WANT_CLOSED_TRACKER )
-  #error WANT_BLACKLISTING and WANT_CLOSED_TRACKER are exclusive.
-#endif
-#if defined ( WANT_BLACKLISTING ) || defined (WANT_CLOSED_TRACKER )
-static char *accesslist_filename = NULL;
-#define WANT_ACCESS_CONTROL
-#endif
-
 #ifndef WANT_TRACKER_SYNC
 #define add_peer_to_torrent(A,B,C) add_peer_to_torrent(A,B)
 #endif
@@ -331,12 +324,13 @@ LOG_TO_STDERR( "sync: %d.%d.%d.%d\n", h->ip[0], h->ip[1], h->ip[2], h->ip[3] );
     }
 
     if( mode == SYNC_OUT ) {
+      char *reply;
       if( !( reply_size = return_changeset_for_tracker( &reply ) ) ) HTTPERROR_500;
       return sendmmapdata( s, reply, reply_size );
     }
 
     /* Simple but proof for now */
-    reply = "OK";
+    memmove( static_outbuf + SUCCESS_HTTP_HEADER_LENGTH, "OK", 2);
     reply_size = 2;
 
     break;
@@ -772,48 +766,14 @@ static void ot_try_bind( char ip[4], uint16 port, int is_tcp ) {
   ++ot_sockets_count;
 }
 
-#ifdef WANT_ACCESS_CONTROL
-/* Read initial access list */
-void read_accesslist_file( int foo ) {
-  FILE *  accesslist_filehandle;
-  ot_hash infohash;
-  foo = foo;
-
-  accesslist_filehandle = fopen( 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).", accesslist_filename );
-    return;
-  }
-
-  /* We do ignore anything that is not of the form "^[:xdigit:]{40}[^:xdigit:].*" */
-  while( fgets( static_inbuf, sizeof(static_inbuf), accesslist_filehandle ) ) {
-    int i;
-    for( i=0; i<20; ++i ) {
-      int eger = 16 * scan_fromhex( static_inbuf[ 2*i ] ) + scan_fromhex( static_inbuf[ 1 + 2*i ] );
-      if( eger < 0 )
-        continue;
-      infohash[i] = eger;
-    }
-    if( scan_fromhex( static_inbuf[ 40 ] ) >= 0 )
-      continue;
-
-    /* Append accesslist to accesslist vector */
-    accesslist_addentry( &infohash );
-  }
-
-  fclose( accesslist_filehandle );
-}
-#endif
-
 int main( int argc, char **argv ) {
   struct passwd *pws = NULL;
   char serverip[4] = {0,0,0,0};
   char *serverdir = ".";
   int scanon = 1;
+#ifdef WANT_ACCESS_CONTROL
+  char *accesslist_filename = NULL;
+#endif
 
   while( scanon ) {
     switch( getopt( argc, argv, ":i:p:A:P:d:"
@@ -863,13 +823,7 @@ int main( int argc, char **argv ) {
   }
   endpwent();
 
-#ifdef WANT_ACCESS_CONTROL
-  /* Passing "0" since read_blacklist_file also is SIGHUP handler */
-  if( accesslist_filename ) {
-    read_accesslist_file( 0 );
-    signal( SIGHUP,  read_accesslist_file );
-  }
-#endif
+  accesslist_init( accesslist_filename );
 
   signal( SIGPIPE, SIG_IGN );
   signal( SIGINT,  signal_handler );
diff --git a/ot_accesslist.c b/ot_accesslist.c
new file mode 100644
index 0000000..e63cff8
--- /dev/null
+++ b/ot_accesslist.c
@@ -0,0 +1,95 @@
+/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
+   It is considered beerware. Prost. Skol. Cheers or whatever. */
+
+/* System */
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+/* Libowfat */
+#include "byte.h"
+#include "scan.h"
+
+/* Opentracker */
+#include "ot_accesslist.h"
+
+/* GLOBAL VARIABLES */
+#ifdef WANT_ACCESS_CONTROL
+static char *accesslist_filename = NULL;
+static ot_vector accesslist;
+
+static void accesslist_reset( void ) {
+  free( accesslist.data );
+  byte_zero( &accesslist, sizeof( accesslist ) );
+}
+
+static int accesslist_addentry( ot_hash *infohash ) {
+  int em;
+  void *insert = vector_find_or_insert( &accesslist, infohash, OT_HASH_COMPARE_SIZE, OT_HASH_COMPARE_SIZE, &em );
+
+  if( !insert )
+    return -1;
+
+  memmove( insert, infohash, OT_HASH_COMPARE_SIZE );
+
+  return 0;
+}
+
+/* Read initial access list */
+static void accesslist_readfile( int foo ) {
+  FILE *  accesslist_filehandle;
+  ot_hash infohash;
+  foo = foo;
+
+  accesslist_filehandle = fopen( 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).", accesslist_filename );
+    return;
+  }
+
+  /* We do ignore anything that is not of the form "^[:xdigit:]{40}[^:xdigit:].*" */
+  while( fgets( static_inbuf, sizeof(static_inbuf), accesslist_filehandle ) ) {
+    int i;
+    for( i=0; i<20; ++i ) {
+      int eger = 16 * scan_fromhex( static_inbuf[ 2*i ] ) + scan_fromhex( static_inbuf[ 1 + 2*i ] );
+      if( eger < 0 )
+        continue;
+      infohash[i] = eger;
+    }
+    if( scan_fromhex( static_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_BLACKLISTING
+  exactmatch = !exactmatch;
+#endif
+
+  return exactmatch;
+}
+
+void accesslist_init( char *accesslist_filename_in ) {
+  byte_zero( &accesslist, sizeof( accesslist ) );
+
+  /* Passing "0" since read_blacklist_file also is SIGHUP handler */
+  if( accesslist_filename_in ) {
+    accesslist_filename = accesslist_filename_in;
+    accesslist_readfile( 0 );
+    signal( SIGHUP,  accesslist_readfile );
+  }
+}
+
+#endif
diff --git a/ot_accesslist.h b/ot_accesslist.h
new file mode 100644
index 0000000..d24463d
--- /dev/null
+++ b/ot_accesslist.h
@@ -0,0 +1,22 @@
+/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
+   It is considered beerware. Prost. Skol. Cheers or whatever. */
+
+#ifndef __OT_ACCESSLIST_H__
+#define __OT_ACCESSLIST_H__
+
+#include "trackerlogic.h"
+
+#if defined ( WANT_BLACKLISTING ) && defined (WANT_CLOSED_TRACKER )
+  #error WANT_BLACKLISTING and WANT_CLOSED_TRACKER are exclusive.
+#endif
+
+#if defined ( WANT_BLACKLISTING ) || defined (WANT_CLOSED_TRACKER )
+#define WANT_ACCESS_CONTROL
+void accesslist_init( char *accesslist_filename );
+int  accesslist_hashisvalid( ot_hash *hash );
+#else
+#define accesslist_init( accesslist_filename )
+#define accesslist_hashisvalid( hash ) 1
+#endif
+
+#endif
diff --git a/trackerlogic.c b/trackerlogic.c
index 7f28903..d0d5235 100644
--- a/trackerlogic.c
+++ b/trackerlogic.c
@@ -21,12 +21,7 @@
 #include "ot_mutex.h"
 #include "ot_stats.h"
 #include "ot_clean.h"
-
-/* GLOBAL VARIABLES */
-#if defined ( WANT_BLACKLISTING ) || defined( WANT_CLOSED_TRACKER )
-static ot_vector accesslist;
-#define WANT_ACCESS_CONTROL
-#endif
+#include "ot_accesslist.h"
 
 void free_peerlist( ot_peerlist *peer_list ) {
   size_t i;
@@ -46,18 +41,10 @@ ot_torrent *add_peer_to_torrent( ot_hash *hash, ot_peer *peer  WANT_TRACKER_SYNC
   ot_vector  *torrents_list = mutex_bucket_lock_by_hash( hash ), *peer_pool;
   int         base_pool = 0;
 
-#ifdef WANT_ACCESS_CONTROL
-  binary_search( hash, accesslist.data, accesslist.size, OT_HASH_COMPARE_SIZE, OT_HASH_COMPARE_SIZE, &exactmatch );
-
-#ifdef WANT_CLOSED_TRACKER
-  exactmatch = !exactmatch;
-#endif
-
-  if( exactmatch ) {
+  if( !accesslist_hashisvalid( hash ) ) {
     mutex_bucket_unlock_by_hash( hash );
     return NULL;
   }
-#endif
 
   torrent = vector_find_or_insert( torrents_list, (void*)hash, sizeof( ot_torrent ), OT_HASH_COMPARE_SIZE, &exactmatch );
   if( !torrent ) {
@@ -326,25 +313,6 @@ exit_loop:
   return (size_t)20;
 }
 
-#ifdef WANT_ACCESS_CONTROL
-void accesslist_reset( void ) {
-  free( accesslist.data );
-  byte_zero( &accesslist, sizeof( accesslist ) );
-}
-
-int accesslist_addentry( ot_hash *infohash ) {
-  int em;
-  void *insert = vector_find_or_insert( &accesslist, infohash, OT_HASH_COMPARE_SIZE, OT_HASH_COMPARE_SIZE, &em );
-
-  if( !insert )
-    return -1;
-
-  memmove( insert, infohash, OT_HASH_COMPARE_SIZE );
-
-  return 0;
-}
-#endif
-
 int trackerlogic_init( const char * const serverdir ) {
   if( serverdir && chdir( serverdir ) ) {
     fprintf( stderr, "Could not chdir() to %s\n", serverdir );
@@ -352,7 +320,7 @@ int trackerlogic_init( const char * const serverdir ) {
   }
 
   srandom( time(NULL) );
-  
+
   clean_init( );
   mutex_init( );
 
diff --git a/trackerlogic.h b/trackerlogic.h
index b216e50..5e97e7c 100644
--- a/trackerlogic.h
+++ b/trackerlogic.h
@@ -107,11 +107,6 @@ size_t return_tcp_scrape_for_torrent( ot_hash *hash, int amount, char *reply );
 size_t return_udp_scrape_for_torrent( ot_hash *hash, char *reply );
 void   clean_all_torrents( void );
 
-#if defined ( WANT_BLACKLISTING ) || defined ( WANT_CLOSED_TRACKER )
-int    accesslist_addentry( ot_hash *hash );
-void   accesslist_reset( void );
-#endif
-
 /* Helper, before it moves to its own object */
 void fix_mmapallocation( void *buf, size_t old_alloc, size_t new_alloc );
 void free_peerlist( ot_peerlist *peer_list );