Implement simple Happy Eyeballs for HTTP/FTP downloads

1 files changed, 89 insertions, 0 deletions

diff --git a/src/BackupIPv4ConnectCommand.h b/src/BackupIPv4ConnectCommand.h
new file mode 100644
index 00000000..de207bc1
--- /dev/null
+++ b/src/BackupIPv4ConnectCommand.h
@@ -0,0 +1,89 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2013 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#ifndef BACKUP_IPV4_CONNECT_COMMAND_H
+#define BACKUP_IPV4_CONNECT_COMMAND_H
+
+#include "Command.h"
+
+#include <string>
+
+#include "SharedHandle.h"
+#include "TimerA2.h"
+
+namespace aria2 {
+
+class RequestGroup;
+class DownloadEngine;
+class SocketCore;
+
+// Used to communicate mainCommand and backup IPv4 connection command.
+// When backup connection succeeds, ipaddr is filled with connected
+// IPv4 address and socket is a socket connected to the ipaddr.  If
+// mainCommand wants to cancel backup connection command, cancel
+// member becomes true.
+struct BackupConnectInfo {
+  std::string ipaddr;
+  SharedHandle<SocketCore> socket;
+  bool cancel;
+  BackupConnectInfo();
+};
+
+// Make backup connection to IPv4 address. This is a simplest RFC 6555
+// "Happy Eyeballs" implementation.
+class BackupIPv4ConnectCommand : public Command {
+public:
+  BackupIPv4ConnectCommand(cuid_t cuid,
+                           const std::string& ipaddr, uint16_t port,
+                           const SharedHandle<BackupConnectInfo>& info,
+                           Command* mainCommand,
+                           RequestGroup* requestGroup, DownloadEngine* e);
+  ~BackupIPv4ConnectCommand();
+  virtual bool execute();
+private:
+  std::string ipaddr_;
+  uint16_t port_;
+  SharedHandle<SocketCore> socket_;
+  SharedHandle<BackupConnectInfo> info_;
+  Command* mainCommand_;
+  RequestGroup* requestGroup_;
+  DownloadEngine* e_;
+  Timer startTime_;
+  Timer timeoutCheck_;
+  time_t timeout_;
+};
+
+} // namespace aria2
+
+#endif // BACKUP_IPV4_CONNECT_COMMAND_H