add support for more stats:

1. stats for added and removed torrents
2. stats for start and stopped events from peers

this should help to detect DoS attacks and is useful for
profiling

ot_http.c

@@ -251,6 +251,10 @@ static ssize_t http_handle_stats( const int64 client_socket, char *data, char *d
         mode = TASK_STATS_TPB;
       else if( !byte_diff(data,4,"herr"))
         mode = TASK_STATS_HTTPERRORS;
+      else if( !byte_diff(data,9,"startstop"))
+        mode = TASK_STATS_STARTSTOP;
+      else if( !byte_diff(data,10,"toraddrem"))
+        mode = TASK_STATS_TORADDREM;
       else
         HTTPERROR_400_PARAM;
       break;

ot_mutex.h

@@ -24,6 +24,8 @@ typedef enum {
   TASK_STATS_TPB                   = 0x0007,
   TASK_STATS_HTTPERRORS            = 0x0008,
   TASK_STATS_TORRENTS              = 0x0009,
+  TASK_STATS_STARTSTOP             = 0x000a,
+  TASK_STATS_TORADDREM             = 0x000b,
 
   TASK_STATS_SLASH24S              = 0x0100,
 

ot_stats.c

@@ -264,6 +264,48 @@ static size_t stats_peers_mrtg( char * reply ) {
   );
 }
 
+static size_t stats_startstop_mrtg( char * reply )
+{
+  size_t    torrent_count = 0;
+  int bucket;
+
+  for( bucket=0; bucket<OT_BUCKET_COUNT; ++bucket )
+  {
+    ot_vector *torrents_list = mutex_bucket_lock( bucket );
+    torrent_count += torrents_list->size;
+    mutex_bucket_unlock( bucket );
+  }
+
+  return sprintf( reply, "%zd\n%zd\nopentracker handling %zd torrents\nopentracker",
+    (size_t)0,
+    (size_t)0,
+    torrent_count
+  );
+}
+
+static size_t stats_toraddrem_mrtg( char * reply )
+{
+  size_t    peer_count = 0, j;
+  int bucket;
+
+  for( bucket=0; bucket<OT_BUCKET_COUNT; ++bucket )
+  {
+    ot_vector *torrents_list = mutex_bucket_lock( bucket );
+    for( j=0; j<torrents_list->size; ++j )
+    {
+      ot_peerlist *peer_list = ( ((ot_torrent*)(torrents_list->data))[j] ).peer_list;
+      peer_count += peer_list->peer_count;
+    }
+    mutex_bucket_unlock( bucket );
+  }
+
+  return sprintf( reply, "%zd\n%zd\nopentracker handling %zd peers\nopentracker",
+    (size_t)0,
+    (size_t)0,
+    peer_count
+  );
+}
+
 static size_t stats_torrents_mrtg( char * reply )
 {
   size_t torrent_count = 0;
@@ -305,6 +347,10 @@ size_t return_stats_for_tracker( char *reply, int mode, int format ) {
       return stats_peers_mrtg( reply );
     case TASK_STATS_TORRENTS:
       return stats_torrents_mrtg( reply );
+    case TASK_STATS_TORADDREM:
+      return stats_toraddrem_mrtg( reply );
+    case TASK_STATS_STARTSTOP:
+      return stats_startstop_mrtg( reply );
     case TASK_STATS_SLASH24S:
       return stats_slash24s_txt( reply, 25, 16 );
     case TASK_STATS_TOP5: