dgram: default send address to 127.0.0.1 or ::1

In net we default to 'localhost' as the default address for connect.
Not doing the same on dgram is confusing, because sending to 0.0.0.0
works on Linux/OS X but not on Windows. Defaulting that to 127.0.0.1 /
::1 addresses that.

Related: https://github.com/nodejs/node/pull/5407
Related: https://github.com/nodejs/node/issues/5398
Fixes: https://github.com/nodejs/node/issues/5487
PR-URL: https://github.com/nodejs/node/pull/5493
Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>

2 files changed, 36 insertions, 12 deletions

diff --git a/test/parallel/test-dgram-send-default-host.js b/test/parallel/test-dgram-send-default-host.js
index 0c50e70f43..0d49322513 100644
--- a/test/parallel/test-dgram-send-default-host.js
+++ b/test/parallel/test-dgram-send-default-host.js
@@ -4,19 +4,8 @@ const common = require('../common');
 const assert = require('assert');
 const dgram = require('dgram');
 
-if (common.isWindows) {
-  // on Windows this test will fail
-  // see https://github.com/nodejs/node/pull/5407
-  console.log('1..0 # Skipped: This test does not apply on Windows.');
-  return;
-}
-
 const client = dgram.createSocket('udp4');
 
-const timer = setTimeout(function() {
-  throw new Error('Timeout');
-}, common.platformTimeout(2000));
-
 const toSend = [new Buffer(256), new Buffer(256), new Buffer(256), 'hello'];
 
 toSend[0].fill('x');
@@ -36,7 +25,6 @@ client.on('message', function(buf, info) {
 
   if (toSend.length === 0) {
     client.close();
-    clearTimeout(timer);
   }
 });
 
diff --git a/test/parallel/test-dgram-udp6-send-default-host.js b/test/parallel/test-dgram-udp6-send-default-host.js
new file mode 100644
index 0000000000..f482f8b428
--- /dev/null
+++ b/test/parallel/test-dgram-udp6-send-default-host.js
@@ -0,0 +1,36 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+const dgram = require('dgram');
+
+if (!common.hasIPv6) {
+  console.log('1..0 # Skipped: no IPv6 support');
+  return;
+}
+
+const client = dgram.createSocket('udp6');
+
+const toSend = [new Buffer(256), new Buffer(256), new Buffer(256), 'hello'];
+
+toSend[0].fill('x');
+toSend[1].fill('y');
+toSend[2].fill('z');
+
+client.on('listening', function() {
+  client.send(toSend[0], 0, toSend[0].length, common.PORT);
+  client.send(toSend[1], common.PORT);
+  client.send([toSend[2]], common.PORT);
+  client.send(toSend[3], 0, toSend[3].length, common.PORT);
+});
+
+client.on('message', function(buf, info) {
+  const expected = toSend.shift().toString();
+  assert.ok(buf.toString() === expected, 'message was received correctly');
+
+  if (toSend.length === 0) {
+    client.close();
+  }
+});
+
+client.bind(common.PORT);