Merge commit '86cc97e55fe346502462284d2e636a2b3708163e' as 'Sources/OpenVPN3'

2026-04-24 00:00:05 +08:00 · 2020-02-24 14:43:11 +03:00
parent 133b3756e6 86cc97e55f
commit 32f1555929
655 changed files with 146468 additions and 0 deletions
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+//    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) 2012-2017 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/>.
+
+// Low-level TCP transport object.
+
+#ifndef OPENVPN_TRANSPORT_TCPLINK_H
+#define OPENVPN_TRANSPORT_TCPLINK_H
+
+#include <deque>
+#include <utility> // for std::move
+#include <memory>
+
+#include <openvpn/io/io.hpp>
+
+#include <openvpn/common/bigmutex.hpp>
+#include <openvpn/common/size.hpp>
+#include <openvpn/common/rc.hpp>
+#include <openvpn/common/socktypes.hpp>
+#include <openvpn/frame/frame.hpp>
+#include <openvpn/log/sessionstats.hpp>
+#include <openvpn/transport/pktstream.hpp>
+#include <openvpn/transport/mutate.hpp>
+#include <openvpn/transport/tcplinkcommon.hpp>
+
+#ifdef OPENVPN_GREMLIN
+#include <openvpn/transport/gremlin.hpp>
+#endif
+
+namespace openvpn {
+  namespace TCPTransport {
+
+    template <typename Protocol, typename ReadHandler, bool RAW_MODE_ONLY>
+    class Link : public LinkCommon<Protocol,
+				   ReadHandler,
+				   RAW_MODE_ONLY>
+    {
+      typedef std::deque<BufferPtr> Queue;
+
+    public:
+      typedef LinkCommon<Protocol,
+		         ReadHandler,
+		         RAW_MODE_ONLY> Base;
+      typedef RCPtr<Link> Ptr;
+
+      typedef Protocol protocol;
+
+      friend Base;
+
+      Link(ReadHandler read_handler_arg,
+	   typename Protocol::socket& socket_arg,
+	   const size_t send_queue_max_size_arg, // 0 to disable
+	   const size_t free_list_max_size_arg,
+	   const Frame::Context& frame_context_arg,
+	   const SessionStats::Ptr& stats_arg)
+	: Base(read_handler_arg, socket_arg, send_queue_max_size_arg,
+	       free_list_max_size_arg, frame_context_arg, stats_arg)
+      { }
+
+    private:
+      // Called by LinkCommon
+      virtual void from_app_send_buffer(BufferPtr& buf) override
+      {
+	Base::queue_send_buffer(buf);
+      }
+
+      virtual void recv_buffer(PacketFrom::SPtr& pfp, const size_t bytes_recvd) override
+      {
+	bool requeue = true;
+	OPENVPN_LOG_TCPLINK_VERBOSE("TCP recv raw=" << Base::raw_mode_read << " size=" << bytes_recvd);
+
+	pfp->buf.set_size(bytes_recvd);
+	requeue = Base::process_recv_buffer(pfp->buf);
+	if (!Base::halt && requeue)
+	  Base::queue_recv(pfp.release()); // reuse PacketFrom object
+      }
+    };
+  }
+} // namespace openvpn
+
+#endif