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/>.
+
+// A queue of datagram buffers for handling sequences of UDP packets
+
+#ifndef OPENVPN_FRAME_MEMQ_DGRAM_H
+#define OPENVPN_FRAME_MEMQ_DGRAM_H
+
+#include <openvpn/common/size.hpp>
+#include <openvpn/common/exception.hpp>
+#include <openvpn/buffer/memq.hpp>
+#include <openvpn/frame/frame.hpp>
+
+namespace openvpn {
+
+  class MemQDgram : public MemQBase {
+  public:
+    OPENVPN_SIMPLE_EXCEPTION(frame_uninitialized);
+
+    MemQDgram() {}
+    explicit MemQDgram(const Frame::Ptr& frame) : frame_(frame) {}
+    void set_frame(const Frame::Ptr& frame) { frame_ = frame; }
+
+    size_t pending() const
+    {
+      return empty() ? 0 : q.front()->size();
+    }
+
+    void write(const unsigned char *data, size_t size)
+    {
+      if (frame_)
+	{
+	  const Frame::Context& fc = (*frame_)[Frame::READ_BIO_MEMQ_STREAM];
+	  q.push_back(fc.copy(data, size));
+	  length += size;
+	}
+      else
+	throw frame_uninitialized();
+    }
+
+    size_t read(unsigned char *data, size_t len)
+    {
+      BufferPtr& b = q.front();
+      if (len > b->size())
+	len = b->size();
+      b->read(data, len);
+      if (b->empty())
+	q.pop_front();
+      length -= len;
+      return len;
+    }
+
+  private:
+    Frame::Ptr frame_;
+  };
+
+} // namespace openvpn
+
+#endif // OPENVPN_FRAME_MEMQ_DGRAM_H