From 18d457bd3408557a48b453f13b2b99e1ab5e7159 Mon Sep 17 00:00:00 2001
From: Yosuke Furukawa <yosuke.furukawa@gmail.com>
Date: Wed, 1 Apr 2015 23:32:48 +0900
Subject: [PATCH] dgram: call send callback asynchronously

dgram#send callback was changed synchronously.
The PR-URL is here https://github.com/joyent/libuv/pull/1358

This commit is temporary fix until libuv issue is resolved.
https://github.com/libuv/libuv/issues/301

PR-URL: https://github.com/iojs/io.js/pull/1313
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
---
 lib/dgram.js                                  |  5 ++-
 .../test-dgram-send-callback-recursive.js     | 38 +++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 test/parallel/test-dgram-send-callback-recursive.js

diff --git a/lib/dgram.js b/lib/dgram.js
index e80f78da076236..1cce233eab808b 100644
--- a/lib/dgram.js
+++ b/lib/dgram.js
@@ -337,7 +337,10 @@ function afterSend(err) {
   if (err) {
     err = exceptionWithHostPort(err, 'send', this.address, this.port);
   }
-  this.callback(err, this.length);
+  var self = this;
+  setImmediate(function() {
+    self.callback(err, self.length);
+  });
 }
 
 
diff --git a/test/parallel/test-dgram-send-callback-recursive.js b/test/parallel/test-dgram-send-callback-recursive.js
new file mode 100644
index 00000000000000..b1c9745fe88346
--- /dev/null
+++ b/test/parallel/test-dgram-send-callback-recursive.js
@@ -0,0 +1,38 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+
+const dgram = require('dgram');
+const client = dgram.createSocket('udp4');
+const chunk = 'abc';
+var recursiveCount = 0;
+var received = 0;
+const limit = 10;
+
+function onsend() {
+  if (recursiveCount > limit) {
+    throw new Error('infinite loop detected');
+  }
+  if (received < limit) {
+    client.send(
+      chunk, 0, chunk.length, common.PORT, common.localhostIPv4, onsend);
+  }
+  recursiveCount++;
+}
+
+client.on('listening', function() {
+  onsend();
+});
+
+client.on('message', function(buf, info) {
+  received++;
+  if (received === limit) {
+    client.close();
+  }
+});
+
+client.on('close', common.mustCall(function() {
+  assert.equal(received, limit);
+}));
+
+client.bind(common.PORT);