Changeset 10894 for branches/2.0x/libtransmission/peer-mgr.c

Timestamp:

Jun 27, 2010, 1:24:47 AM (12 years ago)

Author:

charles

Message:

(2.0x libT) add randomness to the peer unchoking algorithm

File:

• branches/2.0x/libtransmission/peer-mgr.c (modified) (4 diffs)

branches/2.0x/libtransmission/peer-mgr.c

@@ -12 +12 @@
 
 #include <assert.h>
+#include <limits.h> /* INT_MAX */
 #include <string.h> /* memcpy, memcmp, strstr */
 #include <stdlib.h> /* qsort */
@@ -2578 +2579 @@
     tr_bool         isChoked;
     int             rate;
+    int             salt;
     tr_peer *       peer;
 };
@@ -2593 +2595 @@
     if( a->isChoked != b->isChoked ) /* prefer unchoked */
         return a->isChoked ? 1 : -1;
+
+    if( a->salt != b->salt ) /* random order */
+        return a->salt - b->salt;
 
     return 0;
@@ -2641 +2646 @@
             n->isChoked     = peer->peerIsChoked;
             n->rate         = tr_peerGetPieceSpeed( peer, now, TR_CLIENT_TO_PEER ) * 1024;
+            n->salt         = tr_cryptoWeakRandInt( INT_MAX );
         }
     }