Plumbing for TCP FastOpen for SSL sockets.

net/socket/tcp_socket.cc

Index: net/socket/tcp_socket.cc
diff --git a/net/socket/tcp_socket.cc b/net/socket/tcp_socket.cc
deleted file mode 100644
index 864159750a8d2c700af63ff7692633dac7e50453..0000000000000000000000000000000000000000
--- a/net/socket/tcp_socket.cc
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "net/socket/tcp_socket.h"
-
-#include "base/file_util.h"
-#include "base/files/file_path.h"
-#include "base/location.h"
-#include "base/memory/ref_counted.h"
-#include "base/threading/worker_pool.h"
-
-namespace net {
-
-namespace {
-
-bool g_tcp_fastopen_enabled = false;
-
-#if defined(OS_LINUX) || defined(OS_ANDROID)
-
-typedef base::RefCountedData<bool> SharedBoolean;
-
-// Checks to see if the system supports TCP FastOpen. Notably, it requires
-// kernel support. Additionally, this checks system configuration to ensure that
-// it's enabled.
-void SystemSupportsTCPFastOpen(scoped_refptr<SharedBoolean> supported) {
-  supported->data = false;
-  static const base::FilePath::CharType kTCPFastOpenProcFilePath[] =
-      "/proc/sys/net/ipv4/tcp_fastopen";
-  std::string system_enabled_tcp_fastopen;
-  if (!base::ReadFileToString(base::FilePath(kTCPFastOpenProcFilePath),
-                              &system_enabled_tcp_fastopen)) {
-    return;
-  }
-
-  // As per http://lxr.linux.no/linux+v3.7.7/include/net/tcp.h#L225
-  // TFO_CLIENT_ENABLE is the LSB
-  if (system_enabled_tcp_fastopen.empty() ||
-      (system_enabled_tcp_fastopen[0] & 0x1) == 0) {
-    return;
-  }
-
-  supported->data = true;
-}
-
-void EnableCallback(scoped_refptr<SharedBoolean> supported) {
-  g_tcp_fastopen_enabled = supported->data;
-}
-
-// This is asynchronous because it needs to do file IO, and it isn't allowed to
-// do that on the IO thread.
-void EnableFastOpenIfSupported() {
-  scoped_refptr<SharedBoolean> supported = new SharedBoolean;
-  base::WorkerPool::PostTaskAndReply(
-      FROM_HERE,
-      base::Bind(SystemSupportsTCPFastOpen, supported),
-      base::Bind(EnableCallback, supported),
-      false);
-}
-
-#else
-
-void EnableFastOpenIfSupported() {
-  g_tcp_fastopen_enabled = false;
-}
-
-#endif
-
-}  // namespace
-
-void SetTCPFastOpenEnabled(bool value) {
-  if (value) {
-    EnableFastOpenIfSupported();
-  } else {
-    g_tcp_fastopen_enabled = false;
-  }
-}
-
-bool IsTCPFastOpenEnabled() {
-  return g_tcp_fastopen_enabled;
-}
-
-}  // namespace net