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/>.
+
+// Method to generate a Frame object for typical OpenVPN usage
+
+#ifndef OPENVPN_FRAME_FRAME_INIT_H
+#define OPENVPN_FRAME_FRAME_INIT_H
+
+#include <algorithm>
+
+#include <openvpn/frame/frame.hpp>
+
+namespace openvpn {
+
+  inline Frame::Ptr frame_init(const bool align_adjust_3_1,
+			       const size_t tun_mtu,
+			       const size_t control_channel_payload,
+			       const bool verbose)
+  {
+    const size_t payload = std::max(tun_mtu + 512, size_t(2048));
+    const size_t headroom = 512;
+    const size_t tailroom = 512;
+    const size_t align_block = 16;
+    const unsigned int buffer_flags = 0;
+
+    Frame::Ptr frame(new Frame(Frame::Context(headroom, payload, tailroom, 0, align_block, buffer_flags)));
+    if (align_adjust_3_1)
+      {
+	(*frame)[Frame::READ_LINK_TCP] = Frame::Context(headroom, payload, tailroom, 3, align_block, buffer_flags);
+	(*frame)[Frame::READ_LINK_UDP] = Frame::Context(headroom, payload, tailroom, 1, align_block, buffer_flags);
+      }
+    (*frame)[Frame::READ_BIO_MEMQ_STREAM] = Frame::Context(headroom, std::min(control_channel_payload, payload),
+							   tailroom, 0, align_block, buffer_flags);
+    (*frame)[Frame::WRITE_SSL_CLEARTEXT] = Frame::Context(headroom, payload, tailroom, 0, align_block, BufferAllocated::GROW);
+    frame->standardize_capacity(~0);
+
+    if (verbose)
+      OPENVPN_LOG("Frame=" << headroom << '/' << payload << '/' << tailroom
+		  << " mssfix-ctrl=" << (*frame)[Frame::READ_BIO_MEMQ_STREAM].payload());
+
+    return frame;
+  }
+
+  inline Frame::Context frame_init_context_simple(const size_t payload)
+  {
+    const size_t headroom = 512;
+    const size_t tailroom = 512;
+    const size_t align_block = 16;
+    const unsigned int buffer_flags = 0;
+    return Frame::Context(headroom, payload, tailroom, 0, align_block, buffer_flags);
+  }
+
+  inline Frame::Ptr frame_init_simple(const size_t payload)
+  {
+    Frame::Ptr frame = new Frame(frame_init_context_simple(payload));
+    frame->standardize_capacity(~0);
+    return frame;
+  }
+
+} // namespace openvpn
+
+#endif // OPENVPN_FRAME_FRAME_INIT_H