From fea1b6b2c3d004ad53c5997800229c070ccee79b Mon Sep 17 00:00:00 2001
From: Adam Ierymenko <adam.ierymenko@gmail.com>
Date: Wed, 7 Oct 2015 16:25:08 -0700
Subject: docs

---
 node/Packet.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/node/Packet.hpp b/node/Packet.hpp
index 6f3cb72f..1c7a6f5e 100644
--- a/node/Packet.hpp
+++ b/node/Packet.hpp
@@ -365,6 +365,10 @@ namespace ZeroTier {
  * immutable. This is because intermediate nodes can increment the hop
  * count up to 7 (protocol max).
  *
+ * A hop count of 7 also indicates that receiving peers should not attempt
+ * to learn direct paths from this packet. (Right now direct paths are only
+ * learned from direct packets anyway.)
+ *
  * http://tonyarcieri.com/all-the-crypto-code-youve-ever-written-is-probably-broken
  *
  * For unencrypted packets, MAC is computed on plaintext. Only HELLO is ever
-- 
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