mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 12:12:15 +02:00
119 lines
3.7 KiB
C++
119 lines
3.7 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) 2012-2020 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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#pragma once
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#include <openvpn/acceptor/base.hpp>
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#include <openvpn/win/scoped_handle.hpp>
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#include <openvpn/win/secattr.hpp>
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namespace openvpn {
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namespace Acceptor {
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class NamedPipe : public Base
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{
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public:
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OPENVPN_EXCEPTION(named_pipe_acceptor_error);
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typedef RCPtr<NamedPipe> Ptr;
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NamedPipe(openvpn_io::io_context& io_context,
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const std::string& name_arg,
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const std::string& sddl_string)
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: name(name_arg),
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handle(io_context),
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sa(sddl_string, false, "named pipe")
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{
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}
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virtual void async_accept(ListenerBase* listener,
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const size_t acceptor_index,
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openvpn_io::io_context& io_context) override
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{
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// create the named pipe
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const HANDLE h = ::CreateNamedPipeA(
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name.c_str(),
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PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
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#if _WIN32_WINNT >= 0x0600 // Vista and higher
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PIPE_REJECT_REMOTE_CLIENTS |
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#endif
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PIPE_TYPE_BYTE | PIPE_READMODE_BYTE,
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PIPE_UNLIMITED_INSTANCES,
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2048, // output buffer size
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2048, // input buffer size
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0,
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&sa.sa);
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if (!Win::Handle::defined(h))
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{
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const openvpn_io::error_code err(::GetLastError(), openvpn_io::error::get_system_category());
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OPENVPN_THROW(named_pipe_acceptor_error, "failed to create named pipe: " << name << " : " << err.message());
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}
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// wait for connection (asynchronously)
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{
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handle.assign(h);
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openvpn_io::windows::overlapped_ptr over(
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io_context,
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[self=Ptr(this), listener=ListenerBase::Ptr(listener), acceptor_index]
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(const openvpn_io::error_code& ec, size_t bytes_transferred) {
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// accept client connection
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listener->handle_accept(new AsioPolySock::NamedPipe(std::move(self->handle), acceptor_index),
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ec.value() == ERROR_PIPE_CONNECTED // not an error
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? openvpn_io::error_code()
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: ec);
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});
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const BOOL ok = ::ConnectNamedPipe(handle.native_handle(), over.get());
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const DWORD err = ::GetLastError();
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if (!ok && err != ERROR_IO_PENDING)
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{
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// The operation completed immediately,
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// so a completion notification needs
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// to be posted. When complete() is called,
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// ownership of the OVERLAPPED-derived
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// object passes to the io_service.
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const openvpn_io::error_code ec(err, openvpn_io::error::get_system_category());
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over.complete(ec, 0);
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}
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else // ok || err == ERROR_IO_PENDING
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{
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// The operation was successfully initiated,
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// so ownership of the OVERLAPPED-derived object
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// has passed to the io_service.
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over.release();
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}
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}
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}
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virtual void close() override
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{
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handle.close();
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}
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private:
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std::string name;
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openvpn_io::windows::stream_handle handle;
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Win::SecurityAttributes sa;
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};
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}
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}
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