return random check back intervals to our clients

opentracker.c

@@ -26,9 +26,6 @@
 #include "trackerlogic.h"
 #include "scan_urlencoded_query.h"
 
-unsigned int const OT_CLIENT_TIMEOUT = 30;
-unsigned int const OT_CLIENT_TIMEOUT_CHECKINTERVAL = 5;
-
 static unsigned int ot_overall_connections = 0;
 static unsigned int ot_overall_successfulannounces = 0;
 static time_t ot_start_time;
@@ -346,7 +343,7 @@ e400_param:
 
     if( OT_FLAG( &peer ) & PEER_FLAG_STOPPED ) {
       remove_peer_from_torrent( hash, &peer );
-      memmove( static_scratch + SUCCESS_HTTP_HEADER_LENGTH, "d8:completei0e10:incompletei0e8:intervali1800e5:peers0:e", reply_size = 56 );
+      reply_size = sprintf( static_scratch + SUCCESS_HTTP_HEADER_LENGTH, "d8:completei0e10:incompletei0e8:intervali%ie5:peers0:e", OT_CLIENT_REQUEST_INTERVAL_RANDOM );
     } else {
       torrent = add_peer_to_torrent( hash, &peer );
       if( !torrent ) {
@@ -511,7 +508,7 @@ void handle_accept( int64 serversocket ) {
   while( ( i = socket_accept4( serversocket, (char*)ip, &port) ) != -1 ) {
 
     if( !io_fd( i ) ||
-        !( h = (struct http_data*)malloc( sizeof struct http_data ) ) ) {
+        !( h = (struct http_data*)malloc( sizeof( struct http_data ) ) ) ) {
       io_close( i );
       continue;
     }

trackerlogic.c

@@ -253,7 +253,7 @@ size_t return_peers_for_torrent( ot_torrent *torrent, unsigned int amount, char
   }
   if( peer_count < amount ) amount = peer_count;
 
-  r += sprintf( r, "d8:completei%ie10:incompletei%ie8:intervali1800e5:peers%i:", seed_count, peer_count-seed_count, 6*amount );
+  r += sprintf( r, "d8:completei%ie10:incompletei%ie8:intervali%ie5:peers%i:", seed_count, peer_count-seed_count, OT_CLIENT_REQUEST_INTERVAL_RANDOM, 6*amount );
   if( amount ) {
     unsigned int pool_offset, pool_index = 0;;
     unsigned int shifted_pc = peer_count;

trackerlogic.h

@@ -18,6 +18,14 @@ typedef ot_byte        ot_hash[20];
 typedef ot_dword       ot_ip;
 typedef time_t         ot_time;
 
+/* Some tracker behaviour tunable */
+#define OT_CLIENT_TIMEOUT 30
+#define OT_CLIENT_TIMEOUT_CHECKINTERVAL 5
+#define OT_CLIENT_REQUEST_INTERVAL 1800
+#define OT_CLIENT_REQUEST_VARIATION 180
+
+#define OT_CLIENT_REQUEST_INTERVAL_RANDOM ( OT_CLIENT_REQUEST_INTERVAL + (int)( random( ) % OT_CLIENT_REQUEST_VARIATION ) )
+
 /* We maintain a list of 256 pointers to sorted list of ot_torrent structs
    Sort key is, of course, its hash */