TLS: Finer locks on _cycle.

Data being sent out of order.

lib/tls.js

@@ -508,33 +508,49 @@ exports.createSecurePair = function(credentials,
  * Because it is also called everywhere, we also check if the connection has
  * completed negotiation and emit 'secure' from here if it has.
  */
-SecurePair.prototype._cycle = function() {
+SecurePair.prototype._cycle = function(depth) {
+  depth = depth ? depth : 0;
   if (this._done) {
     return;
   }
 
-  // Make this function reentrant.
-  if (this._cycleLock) return;
-  this._cycleLock = true;
-  this._writeCalled = false;
+  if(depth == 0) this._writeCalled = false;
 
   var established = this._secureEstablished;
 
-  this.encrypted._pull();
-  this.cleartext._pull();
-  this.cleartext._push();
-  this.encrypted._push();
+  if (!this._cycleEncryptedPullLock) {
+    this._cycleEncryptedPullLock = true;
+    this.encrypted._pull();
+    this._cycleEncryptedPullLock = false;
+  }
+
+  if (!this._cycleCleartextPullLock) {
+    this._cycleCleartextPullLock = true;
+    this.cleartext._pull();
+    this._cycleCleartextPullLock = false;
+  }
 
-  this._cycleLock = false;
+  if (!this._cycleCleartextPushLock) {
+    this._cycleCleartextPushLock = true;
+    this.cleartext._push();
+    this._cycleCleartextPushLock = false;
+  }
+
+  if (!this._cycleEncryptedPushLock) {
+    this._cycleEncryptedPushLock = true;
+    this.encrypted._push();
+    this._cycleEncryptedPushLock = false;
+  }
 
   if (this._done) {
     return;
   }
 
-  if ((!established && this._secureEstablished) || this._writeCalled) {
+  if ((!established && this._secureEstablished) ||
+      (depth == 0 && this._writeCalled)) {
     // If we were not established but now we are, let's cycle again.
     // Or if there is some data to write...
-    this._cycle();
+    this._cycle(depth + 1);
   }
 };