mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-19 19:52:15 +02:00
104 lines
3.2 KiB
C++
104 lines
3.2 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) 2012-2022 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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// Low-level TCP transport object.
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#ifndef OPENVPN_TRANSPORT_TCPLINK_H
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#define OPENVPN_TRANSPORT_TCPLINK_H
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#include <deque>
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#include <utility> // for std::move
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#include <memory>
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#include <openvpn/io/io.hpp>
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#include <openvpn/common/bigmutex.hpp>
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#include <openvpn/common/size.hpp>
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#include <openvpn/common/rc.hpp>
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#include <openvpn/common/socktypes.hpp>
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#include <openvpn/frame/frame.hpp>
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#include <openvpn/log/sessionstats.hpp>
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#include <openvpn/transport/pktstream.hpp>
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#include <openvpn/transport/mutate.hpp>
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#include <openvpn/transport/tcplinkcommon.hpp>
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#ifdef OPENVPN_GREMLIN
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#include <openvpn/transport/gremlin.hpp>
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#endif
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namespace openvpn::TCPTransport {
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template <typename Protocol, typename ReadHandler, bool RAW_MODE_ONLY>
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class TCPLink : public LinkCommon<Protocol,
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ReadHandler,
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RAW_MODE_ONLY>
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{
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typedef std::deque<BufferPtr> Queue;
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public:
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typedef LinkCommon<Protocol,
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ReadHandler,
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RAW_MODE_ONLY>
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Base;
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typedef RCPtr<TCPLink> Ptr;
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typedef Protocol protocol;
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friend Base;
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TCPLink(ReadHandler read_handler_arg,
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typename Protocol::socket &socket_arg,
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const size_t send_queue_max_size_arg, // 0 to disable
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const size_t free_list_max_size_arg,
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const Frame::Context &frame_context_arg,
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const SessionStats::Ptr &stats_arg)
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: Base(read_handler_arg,
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socket_arg,
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send_queue_max_size_arg,
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free_list_max_size_arg,
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frame_context_arg,
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stats_arg)
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{
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}
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private:
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// Called by LinkCommon
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virtual void from_app_send_buffer(BufferPtr &buf) override
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{
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Base::queue_send_buffer(buf);
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}
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virtual void recv_buffer(PacketFrom::SPtr &pfp, const size_t bytes_recvd) override
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{
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bool requeue = true;
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OPENVPN_LOG_TCPLINK_VERBOSE("TCP recv raw="
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<< Base::raw_mode_read << " size=" << bytes_recvd);
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pfp->buf.set_size(bytes_recvd);
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requeue = Base::process_recv_buffer(pfp->buf);
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if (!Base::halt && requeue)
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Base::queue_recv(pfp.release()); // reuse PacketFrom object
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}
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};
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} // namespace openvpn::TCPTransport
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#endif
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