From 1d1c430b1f071f43549e30d4f11bc1d56f071c03 Mon Sep 17 00:00:00 2001
From: moneromooo <moneromoo@nowhere.nowhere.nowhere>
Date: Fri, 1 Jan 2021 15:27:15 +0000
Subject: [PATCH] p2p: fix cubic selection in filtered peer list

Integer quantization biased the picks a lot (leading some indices
to never be selected)
---
 src/p2p/net_node.inl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/p2p/net_node.inl b/src/p2p/net_node.inl
index bf053f0f2..315ebfdde 100644
--- a/src/p2p/net_node.inl
+++ b/src/p2p/net_node.inl
@@ -1243,8 +1243,8 @@ namespace nodetool
     if(!max_index)
       return 0;
 
-    size_t x = crypto::rand<size_t>()%(max_index+1);
-    size_t res = (x*x*x)/(max_index*max_index); //parabola \/
+    size_t x = crypto::rand<size_t>()%(16*max_index+1);
+    size_t res = (x*x*x)/(max_index*max_index*16*16*16); //parabola \/
     MDEBUG("Random connection index=" << res << "(x="<< x << ", max_index=" << max_index << ")");
     return res;
   }