fix_infinite_hello.patch

From ca9c781a458818f505b11c566d1bdd9c41dd9ab9 Mon Sep 17 00:00:00 2001
From: jonasnick <jonasd.nick@gmail.com>
Date: Sun, 4 May 2014 23:19:37 +0200
Subject: [PATCH] Fixes infinite hello request/reply messages in networks with
 >2 nodes.

---
 node/crypto2crypto.py |   31 +++++++++++++++++++++----------
 1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/node/crypto2crypto.py b/node/crypto2crypto.py
index 201a6ea..bb8aeb0 100644
--- a/node/crypto2crypto.py
+++ b/node/crypto2crypto.py
@@ -114,19 +114,30 @@ class CryptoTransportLayer(TransportLayer):
         msg_type = msg.get('type')        
 
         if not uri in self._peers:
+            # unknown peer
             print 'Create New Peer: ',uri
             self.create_peer(uri, pub)
-        elif pub and not self._peers[uri]._pub:
-            self.log("Setting public key for seed node")
-            self._peers[uri]._pub = pub.decode('hex')
-        elif pub and (self._peers[uri]._pub != pub.decode('hex')):
-            self.log("Adjusting public key for node")
-            self._peers[uri]._pub = pub.decode('hex')
+
+            if not msg_type:
+                self.send_enc(uri, hello_request(self.get_profile()))
+            elif msg_type == 'hello_request':
+                self.send_enc(uri, hello_response(self.get_profile()))
+
+        else:
+            # known peer
+            if pub:
+                # test if we have to update the pubkey 
+                if not self._peers[uri]._pub:
+                    self.log("Setting public key for seed node")
+                    self._peers[uri]._pub = pub.decode('hex')
+                if (self._peers[uri]._pub != pub.decode('hex')):
+                    self.log("Updating public key for node")
+                    self._peers[uri]._pub = pub.decode('hex')
         
-        if not msg_type:
-            self.send_enc(uri, hello_request(self.get_profile()))
-        elif msg_type == 'hello_request':
-            self.send_enc(uri, hello_response(self.get_profile()))
+            if msg_type == 'hello_request':
+                # reply only if necessary
+                self.send_enc(uri, hello_response(self.get_profile()))
+
 
 
     def on_raw_message(self, serialized):
-- 
1.7.9.5