mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 04:02:15 +02:00
121 lines
3.5 KiB
C++
121 lines
3.5 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) 2012-2022 OpenVPN 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 Affero 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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero 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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// Abstract base classes for server tun objects
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#ifndef OPENVPN_TUN_SERVER_TUNBASE_H
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#define OPENVPN_TUN_SERVER_TUNBASE_H
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#include <string>
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#include <openvpn/common/exception.hpp>
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#include <openvpn/common/rc.hpp>
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#include <openvpn/common/function.hpp>
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#include <openvpn/buffer/buffer.hpp>
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#include <openvpn/addr/ip.hpp>
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#include <openvpn/server/servhalt.hpp>
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namespace openvpn::TunClientInstance {
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typedef Function<void(int fd)> PostCloseFunc;
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// A native reference to a client instance
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struct NativeHandle
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{
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NativeHandle()
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{
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}
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NativeHandle(const int fd_arg, const int peer_id_arg)
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: fd(fd_arg),
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peer_id(peer_id_arg)
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{
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}
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bool fd_defined() const
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{
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return fd >= 0;
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}
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bool defined() const
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{
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return fd >= 0 && peer_id >= 0;
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}
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int fd = -1;
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int peer_id = -1;
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};
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// Base class for the client instance receiver. Note that all
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// client instance receivers (transport, routing, management,
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// etc.) must inherit virtually from RC because the client instance
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// object will inherit from multiple receivers.
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struct Recv : public virtual RC<thread_unsafe_refcount>
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{
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typedef RCPtr<Recv> Ptr;
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// virtual bool defined() const = 0;
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virtual void stop() = 0;
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// Called with IP packets from tun layer.
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virtual void tun_recv(BufferAllocated &buf) = 0;
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// clang-format off
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// push a halt or restart message to client
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virtual void push_halt_restart_msg(const HaltRestart::Type type,
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const std::string &reason,
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const std::string &client_reason) = 0;
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// clang-format on
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};
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// Base class for the per-client-instance state of the TunServer.
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// Each client instance uses this class to send data to the tun layer.
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struct Send : public virtual RC<thread_unsafe_refcount>
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{
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typedef RCPtr<Send> Ptr;
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// virtual bool defined() const = 0;
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virtual void stop() = 0;
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virtual bool tun_send_const(const Buffer &buf) = 0;
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virtual bool tun_send(BufferAllocated &buf) = 0;
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// get the native handle for tun/peer
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virtual NativeHandle tun_native_handle() = 0;
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// set up relay to target
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virtual void relay(const IP::Addr &target, const int port) = 0;
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virtual const std::string &tun_info() const = 0;
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};
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// Factory for server tun object.
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struct Factory : public RC<thread_unsafe_refcount>
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{
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typedef RCPtr<Factory> Ptr;
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virtual Send::Ptr new_tun_obj(Recv *parent) = 0;
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};
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} // namespace openvpn::TunClientInstance
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#endif
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