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diff --git a/cpp/src/polo/pairing/message/optionsmessage.h b/cpp/src/polo/pairing/message/optionsmessage.h
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+// Copyright 2012 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef POLO_PAIRING_MESSAGE_OPTIONSMESSAGE_H_
+#define POLO_PAIRING_MESSAGE_OPTIONSMESSAGE_H_
+
+#include <set>
+#include <string>
+#include "polo/encoding/encodingoption.h"
+#include "polo/pairing/message/polomessage.h"
+
+namespace polo {
+namespace pairing {
+namespace message {
+
+// A message containing the Polo pairing options.
+class OptionsMessage : public PoloMessage {
+ public:
+  // The device role. The display device will be responsible for displaying
+  // a secret code, and the user will enter the secret on the input device.
+  enum ProtocolRole {
+    kUnknown = 0,
+    kInputDevice = 1,
+    kDisplayDevice = 2,
+  };
+
+  // Creates an empty options message. The supported encodings and protocol
+  // role preference should be set before sending this message.
+  OptionsMessage();
+
+  // Adds a supported input encoding.
+  void AddInputEncoding(const encoding::EncodingOption& encoding);
+
+  // Adds a supported output encoding.
+  void AddOutputEncoding(const encoding::EncodingOption& encoding);
+
+  // Determines whether the given input encoding is supported.
+  bool SupportsInputEncoding(
+      const encoding::EncodingOption& encoding) const;
+
+  // Determines whether the given output encoding is supported.
+  bool SupportsOutputEncoding(
+      const encoding::EncodingOption& encoding) const;
+
+  // Sets the protocol role preference.
+  void set_protocol_role_preference(ProtocolRole preference);
+
+  // Gets the protocol role preference.
+  ProtocolRole protocol_role_preference() const;
+
+  // Gets the set of supported input encodings.
+  const encoding::EncodingOption::EncodingSet& input_encodings() const;
+
+  // Gets the set of supported output encodings.
+  const encoding::EncodingOption::EncodingSet& output_encodings() const;
+
+  // @override
+  virtual std::string ToString() const;
+
+ private:
+  ProtocolRole protocol_role_preference_;
+  encoding::EncodingOption::EncodingSet input_encodings_;
+  encoding::EncodingOption::EncodingSet output_encodings_;
+
+  DISALLOW_COPY_AND_ASSIGN(OptionsMessage);
+};
+
+}  // namespace message
+}  // namespace pairing
+}  // namespace polo
+
+#endif  // POLO_PAIRING_MESSAGE_OPTIONSMESSAGE_H_