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C++

// 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) 2012-2020 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/>.
// multi-protocol acceptor classes that handle the protocol-specific
// details of accepting client connections.
#pragma once
#include <vector>
#include <utility>
#include <openvpn/io/io.hpp>
#include <openvpn/common/platform.hpp>
#include <openvpn/common/exception.hpp>
#include <openvpn/common/rc.hpp>
#include <openvpn/common/size.hpp>
#include <openvpn/asio/asiopolysock.hpp>
#ifndef OPENVPN_ACCEPTOR_LISTENER_BASE_RC
#define OPENVPN_ACCEPTOR_LISTENER_BASE_RC RC<thread_unsafe_refcount>
#endif
namespace openvpn {
namespace Acceptor {
struct ListenerBase : public OPENVPN_ACCEPTOR_LISTENER_BASE_RC
{
typedef RCPtr<ListenerBase> Ptr;
virtual void handle_accept(AsioPolySock::Base::Ptr sock, const openvpn_io::error_code& error) = 0;
};
struct Base : public RC<thread_unsafe_refcount>
{
typedef RCPtr<Base> Ptr;
virtual void async_accept(ListenerBase* listener,
const size_t acceptor_index,
openvpn_io::io_context& io_context) = 0;
virtual void close() = 0;
};
struct Item
{
enum SSLMode {
SSLOff,
SSLOn,
#ifdef OPENVPN_POLYSOCK_SUPPORTS_ALT_ROUTING
AltRouting,
#endif
};
Item(Base::Ptr acceptor_arg,
const SSLMode ssl_mode_arg)
: acceptor(std::move(acceptor_arg)),
ssl_mode(ssl_mode_arg)
{
}
Base::Ptr acceptor;
SSLMode ssl_mode;
};
struct Set : public std::vector<Item>
{
void close()
{
for (auto &i : *this)
i.acceptor->close();
}
};
}
}