From 430f489027f15c1e4948ea4378954df24e3fee88 Mon Sep 17 00:00:00 2001
From: Suhas Daftuar <sdaftuar@gmail.com>
Date: Fri, 5 Apr 2019 13:35:15 -0400
Subject: Don't relay addr messages to block-relay-only peers

We don't want relay of addr messages to leak information about
these network links.
---
 src/net.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/net.cpp')

diff --git a/src/net.cpp b/src/net.cpp
index e589b940ad..b44048cbce 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -2647,6 +2647,10 @@ CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn
     fInbound(fInboundIn),
     nKeyedNetGroup(nKeyedNetGroupIn),
     addrKnown(5000, 0.001),
+    // Don't relay addr messages to peers that we connect to as block-relay-only
+    // peers (to prevent adversaries from inferring these links from addr
+    // traffic).
+    m_addr_relay_peer(!block_relay_only),
     id(idIn),
     nLocalHostNonce(nLocalHostNonceIn),
     nLocalServices(nLocalServicesIn),
-- 
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