mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 04:02:15 +02:00
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2017 OpenVPN Technologies, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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// Asio TCP socket that can be configured so that open() method
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// always prebinds the socket to a given local address. Useful
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// for TCP clients.
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#ifndef OPENVPN_ASIO_ASIOBOUNDSOCK_H
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#define OPENVPN_ASIO_ASIOBOUNDSOCK_H
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#include <openvpn/io/io.hpp>
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#include <openvpn/addr/ip.hpp>
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#include <openvpn/common/extern.hpp>
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namespace openvpn {
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namespace AsioBoundSocket {
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typedef openvpn_io::basic_stream_socket<openvpn_io::ip::tcp> SocketBase;
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class Socket : public SocketBase
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{
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public:
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explicit Socket(openvpn_io::io_context& io_context)
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: SocketBase(io_context)
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{
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}
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// if port 0, kernel will dynamically allocate free port
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void bind_local(const IP::Addr& addr, const unsigned short port=0)
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{
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bind_local_addr = addr;
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bind_local_port = port;
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}
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private:
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virtual void async_connect_post_open(const protocol_type& protocol, openvpn_io::error_code& ec) override
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{
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if (bind_local_addr.defined())
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{
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set_option(openvpn_io::socket_base::reuse_address(true), ec);
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if (ec)
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return;
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bind(openvpn_io::ip::tcp::endpoint(bind_local_addr.to_asio(), bind_local_port), ec);
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}
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}
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IP::Addr bind_local_addr;
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unsigned short bind_local_port = 0;
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};
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}
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}
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#endif
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