Squashed 'OpenVPN Adapter/Vendors/openvpn/' content from commit da99df6

git-subtree-dir: OpenVPN Adapter/Vendors/openvpn
git-subtree-split: da99df69492256d7a18bbea303ae98457782a4bf

openvpn/ssl/proto_context_options.hpp

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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 Technologies, Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU 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 General Public License for more details.
+//
+//    You should have received a copy of the GNU General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+// Helper class to parse certain options needed by ProtoContext.
+
+#ifndef OPENVPN_SSL_PROTO_CONTEXT_OPTIONS_H
+#define OPENVPN_SSL_PROTO_CONTEXT_OPTIONS_H
+
+#include <string>
+
+#include <openvpn/common/exception.hpp>
+#include <openvpn/common/options.hpp>
+
+namespace openvpn {
+  struct ProtoContextOptions : public RC<thread_safe_refcount>
+  {
+    typedef RCPtr<ProtoContextOptions> Ptr;
+
+    enum CompressionMode {
+      COMPRESS_NO,
+      COMPRESS_YES,
+      COMPRESS_ASYM
+    };
+
+    ProtoContextOptions() : compression_mode(COMPRESS_NO) {}
+
+    bool is_comp() const { return compression_mode != COMPRESS_NO; }
+    bool is_comp_asym() const { return compression_mode == COMPRESS_ASYM; }
+
+    void parse_compression_mode(const std::string& mode)
+    {
+      if (mode == "no")
+	compression_mode = COMPRESS_NO;
+      else if (mode == "yes")
+	compression_mode = COMPRESS_YES;
+      else if (mode == "asym")
+	compression_mode = COMPRESS_ASYM;
+      else
+	OPENVPN_THROW(option_error, "error parsing compression mode: " << mode);
+    }
+
+    CompressionMode compression_mode;
+  };
+}
+
+#endif