net: cleanup connect logic

Separates out the lookup logic for net.Socket. In the event
the `host` property is an IP address, the lookup is skipped.

PR-URL: https://github.com/iojs/io.js/pull/1505
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>
Reviewed-By: Yosuke Furukawa <yosuke.furukawa@gmail.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/test/parallel/test-net-dns-lookup-skip.js b/test/parallel/test-net-dns-lookup-skip.js
new file mode 100644
index 0000000000..7a129b9795
--- /dev/null
+++ b/test/parallel/test-net-dns-lookup-skip.js
@@ -0,0 +1,18 @@
+var common = require('../common');
+var assert = require('assert');
+var net = require('net');
+
+function check(addressType) {
+  var server = net.createServer(function(client) {
+    client.end();
+    server.close();
+  });
+
+  var address = addressType === 4 ? '127.0.0.1' : '::1';
+  server.listen(common.PORT, address, function() {
+    net.connect(common.PORT, address).on('lookup', assert.fail);
+  });
+}
+
+check(4);
+common.hasIPv6 && check(6);