53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
//
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// Copyright (C) 2014 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#ifndef TRUNKS_COMMAND_TRANSCEIVER_H_
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#define TRUNKS_COMMAND_TRANSCEIVER_H_
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#include <string>
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#include <base/callback_forward.h>
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namespace trunks {
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// CommandTransceiver is an interface that sends commands to a TPM device and
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// receives responses. It can operate synchronously or asynchronously.
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class CommandTransceiver {
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public:
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typedef base::Callback<void(const std::string& response)> ResponseCallback;
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virtual ~CommandTransceiver() {}
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// Sends a TPM |command| asynchronously. When a |response| is received,
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// |callback| will be called with the |response| data from the TPM. If a
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// transmission error occurs |callback| will be called with a well-formed
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// error |response|.
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virtual void SendCommand(const std::string& command,
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const ResponseCallback& callback) = 0;
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// Sends a TPM |command| synchronously (i.e. waits for a response) and returns
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// the response. If a transmission error occurs the response will be populated
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// with a well-formed error response.
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virtual std::string SendCommandAndWait(const std::string& command) = 0;
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// Initializes the actual interface, replaced by the derived classes, where
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// needed.
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virtual bool Init() { return true; }
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};
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} // namespace trunks
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#endif // TRUNKS_COMMAND_TRANSCEIVER_H_
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