Merge commit '86cc97e55fe346502462284d2e636a2b3708163e' as 'Sources/OpenVPN3'

2026-04-24 00:00:05 +08:00 · 2020-02-24 14:43:11 +03:00
parent 133b3756e6 86cc97e55f
commit 32f1555929
655 changed files with 146468 additions and 0 deletions
@@ -0,0 +1,99 @@
+//    OpenVPN -- An application to securely tunnel IP networks
+//               over a single port, with support for SSL/TLS-based
+//               session authentication and key exchange,
+//               packet encryption, packet authentication, and
+//               packet compression.
+//
+//    Copyright (C) 2012-2017 OpenVPN Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License Version 3
+//    as published by the Free Software Foundation.
+//
+//    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 Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+// Asio TCP socket that can be configured so that open() method
+// always prebinds the socket to a given local address.  Useful
+// for TCP clients.
+
+#ifndef OPENVPN_ASIO_ASIOBOUNDSOCK_H
+#define OPENVPN_ASIO_ASIOBOUNDSOCK_H
+
+#include <openvpn/io/io.hpp>
+
+#include <openvpn/addr/ip.hpp>
+#include <openvpn/common/extern.hpp>
+#include <openvpn/common/to_string.hpp>
+
+namespace openvpn {
+  namespace AsioBoundSocket {
+
+    typedef openvpn_io::basic_stream_socket<openvpn_io::ip::tcp> SocketBase;
+
+    class Socket : public SocketBase
+    {
+    public:
+      explicit Socket(openvpn_io::io_context& io_context)
+	: SocketBase(io_context)
+      {
+      }
+
+      // if port 0, kernel will dynamically allocate free port
+      void bind_local(const IP::Addr& addr, const unsigned short port=0)
+      {
+	bind_local_addr = addr;
+	bind_local_port = port;
+      }
+
+      std::string to_string() const
+      {
+	std::string ret;
+	ret.reserve(64);
+	if (bind_local_addr.defined())
+	  {
+	    ret += "local=[";
+	    ret += bind_local_addr.to_string();
+	    ret += "]:";
+	    ret += openvpn::to_string(bind_local_port);
+	  }
+	try {
+	  const std::string re = openvpn::to_string(remote_endpoint());
+	  if (!ret.empty())
+	    ret += ' ';
+	  ret += "remote=";
+	  ret += re;
+	}
+	catch (const std::exception& e)
+	  {
+	  }
+	return ret;
+      }
+
+    protected:
+      virtual void async_connect_post_open(const protocol_type& protocol, openvpn_io::error_code& ec) override
+      {
+	if (bind_local_addr.defined())
+	  {
+	    set_option(openvpn_io::socket_base::reuse_address(true), ec);
+	    if (ec)
+	      return;
+	    bind(openvpn_io::ip::tcp::endpoint(bind_local_addr.to_asio(), bind_local_port), ec);
+	  }
+      }
+
+    private:
+      IP::Addr bind_local_addr;
+      unsigned short bind_local_port = 0;
+    };
+
+  }
+}
+
+#endif