tls: write pending data of opposite side

Fix stucked CryptoStream behaviour, happening when one of the sides
locks-up in queued state.

fix #5023

Author: indutny

lib/tls.js

@@ -435,6 +435,7 @@ CryptoStream.prototype._read = function read(size) {
 
   // Try writing pending data
   if (this._pending !== null) this._writePending();
+  if (this._opposite._pending !== null) this._opposite._writePending();
 
   if (bytesRead === 0) {
     // EOF when cleartext has finished and we have nothing to read

test/simple/test-tls-server-large-request.js

@@ -0,0 +1,74 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('../common');
+var assert = require('assert');
+var tls = require('tls');
+var fs = require('fs');
+var stream = require('stream');
+var util = require('util');
+
+var clientConnected = 0;
+var serverConnected = 0;
+var request = new Buffer(new Array(1024 * 256).join('ABCD')); // 1mb
+
+var options = {
+  key: fs.readFileSync(common.fixturesDir + '/keys/agent1-key.pem'),
+  cert: fs.readFileSync(common.fixturesDir + '/keys/agent1-cert.pem')
+};
+
+function Mediator() {
+  stream.Writable.call(this);
+  this.buf = '';
+};
+util.inherits(Mediator, stream.Writable);
+
+Mediator.prototype._write = function write(data, enc, cb) {
+  this.buf += data;
+  setTimeout(cb, 0);
+
+  if (this.buf.length >= request.length) {
+    assert.equal(this.buf, request.toString());
+    server.close();
+  }
+};
+
+var mediator = new Mediator();
+
+var server = tls.Server(options, function(socket) {
+  socket.pipe(mediator);
+  serverConnected++;
+});
+
+server.listen(common.PORT, function() {
+  var client1 = tls.connect({
+    port: common.PORT,
+    rejectUnauthorized: false
+  }, function() {
+    ++clientConnected;
+    client1.end(request);
+  });
+});
+
+process.on('exit', function() {
+  assert.equal(clientConnected, 1);
+  assert.equal(serverConnected, 1);
+});