From 06df8c42b3accb8d437523155bb905d711adab47 Mon Sep 17 00:00:00 2001
From: Kagami Hiiragi <kagami@genshiken.org>
Date: Thu, 19 Feb 2015 17:16:41 +0300
Subject: [PATCH] Add separate dns-specific bootstrap method

---
 lib/net/tcp.js | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/lib/net/tcp.js b/lib/net/tcp.js
index 5be58b7..d778de3 100644
--- a/lib/net/tcp.js
+++ b/lib/net/tcp.js
@@ -220,19 +220,28 @@ function resolveDnsSeed(seed) {
 }
 
 TcpTransport.prototype.bootstrap = function() {
-  var promises = this.dnsSeeds.map(resolveDnsSeed);
   var hardcodedNodes = this.seeds;
   // FIXME(Kagami): Filter incorrect/private IP range nodes?
   // See also: <https://github.com/Bitmessage/PyBitmessage/issues/768>.
-  return PPromise.all(promises).then(function(dnsNodes) {
-    // Flatten array of arrays.
-    dnsNodes = Array.prototype.concat.apply([], dnsNodes);
+  return this.bootstrapDns().then(function(dnsNodes) {
     // Add hardcoded nodes to the end of list because DNS nodes should
     // be more up-to-date.
     return dnsNodes.concat(hardcodedNodes);
   });
 };
 
+/**
+ * Do only DNS-specific bootstrap.
+ * @return {Promise.<Array>} Discovered seed nodes.
+ */
+TcpTransport.prototype.bootstrapDns = function() {
+  var promises = this.dnsSeeds.map(resolveDnsSeed);
+  return PPromise.all(promises).then(function(dnsNodes) {
+    // Flatten array of arrays.
+    return Array.prototype.concat.apply([], dnsNodes);
+  });
+};
+
 /**
  * Connect to a TCP node. Connection arguments are the same as for
  * [net.connect](http://nodejs.org/api/net.html#net_net_connect_port_host_connectlistener).