First part of an RPC mechanism for container <-> host communication

Mostly based on the protobuf based implementation from Mir.

android/service/host_connector.cpp

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2016 Simon Fels <morphis@gravedo.de>
+ *
+ * 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 warranties of
+ * MERCHANTABILITY, SATISFACTORY QUALITY, 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.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "android/service/host_connector.h"
+#include "android/service/local_socket_connection.h"
+#include "android/service/message_processor.h"
+#include "android/service/server.h"
+
+#include <functional>
+#include <array>
+
+namespace anbox {
+namespace android {
+HostConnector::HostConnector() :
+    socket_(std::make_shared<LocalSocketConnection>("/dev/anbox_bridge")),
+    pending_calls_(std::make_shared<bridge::PendingCallCache>()),
+    server_(std::make_shared<Server>()),
+    message_processor_(std::make_shared<MessageProcessor>(socket_, pending_calls_, server_)),
+    running_(false) {
+}
+
+HostConnector::~HostConnector() {
+}
+
+void HostConnector::start() {
+    if (running_)
+        return;
+
+    running_.exchange(true);
+    thread_ = std::thread(std::bind(&HostConnector::main_loop, this));
+}
+
+void HostConnector::stop() {
+    if (!running_.exchange(false))
+        return;
+
+    thread_.join();
+}
+
+void HostConnector::main_loop() {
+    while (running_) {
+        std::array<std::uint8_t, 8192> buffer;
+        const auto bytes_read = socket_->read_all(buffer.data(), buffer.size());
+        if (bytes_read == 0)
+            break;
+
+        // MessageProcessor wants an vector so give it what it wants until
+        // we refactor this.
+        std::vector<std::uint8_t> data;
+        for (auto n = 0; n < bytes_read; n++)
+            data.push_back(buffer[n]);
+
+        if (!message_processor_->process_data(data))
+            break;
+    }
+
+    // FIXME notify our core that we've stopped
+}
+} // namespace android
+} // namespace anbox