OLD | NEW |
1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "net/socket/tcp_client_socket.h" | 5 #include "net/socket/tcp_client_socket.h" |
6 | 6 |
7 #include "base/file_path.h" | 7 #include "base/file_path.h" |
8 #include "base/file_util.h" | 8 #include "base/file_util.h" |
9 | 9 |
10 namespace net { | 10 namespace net { |
11 | 11 |
12 namespace { | 12 namespace { |
13 | 13 |
14 #if defined(OS_LINUX) | 14 #if defined(OS_LINUX) |
15 | 15 |
16 // Checks to see if the system supports TCP FastOpen. Notably, it requires | 16 // Checks to see if the system supports TCP FastOpen. Notably, it requires |
17 // kernel support. Additionally, this checks system configuration to ensure that | 17 // kernel support. Additionally, this checks system configuration to ensure that |
18 // it's enabled. | 18 // it's enabled. |
19 bool SystemSupportsTCPFastOpen() { | 19 bool SystemSupportsTCPFastOpen() { |
20 static const FilePath::CharType kTCPFastOpenProcFilePath[] = | 20 static const base::FilePath::CharType kTCPFastOpenProcFilePath[] = |
21 "/proc/sys/net/ipv4/tcp_fastopen"; | 21 "/proc/sys/net/ipv4/tcp_fastopen"; |
22 std::string system_enabled_tcp_fastopen; | 22 std::string system_enabled_tcp_fastopen; |
23 if (!file_util::ReadFileToString( | 23 if (!file_util::ReadFileToString( |
24 base::FilePath(kTCPFastOpenProcFilePath), | 24 base::FilePath(kTCPFastOpenProcFilePath), |
25 &system_enabled_tcp_fastopen)) { | 25 &system_enabled_tcp_fastopen)) { |
26 return false; | 26 return false; |
27 } | 27 } |
28 | 28 |
29 // As per http://lxr.linux.no/linux+v3.7.7/include/net/tcp.h#L225 | 29 // As per http://lxr.linux.no/linux+v3.7.7/include/net/tcp.h#L225 |
30 // TFO_CLIENT_ENABLE is the LSB | 30 // TFO_CLIENT_ENABLE is the LSB |
(...skipping 19 matching lines...) Expand all Loading... |
50 | 50 |
51 void SetTCPFastOpenEnabled(bool value) { | 51 void SetTCPFastOpenEnabled(bool value) { |
52 g_tcp_fastopen_enabled = value && SystemSupportsTCPFastOpen(); | 52 g_tcp_fastopen_enabled = value && SystemSupportsTCPFastOpen(); |
53 } | 53 } |
54 | 54 |
55 bool IsTCPFastOpenEnabled() { | 55 bool IsTCPFastOpenEnabled() { |
56 return g_tcp_fastopen_enabled; | 56 return g_tcp_fastopen_enabled; |
57 } | 57 } |
58 | 58 |
59 } // namespace net | 59 } // namespace net |
OLD | NEW |