ipmi: split dbus get property into separate file
This is a step towards handling getting/setting dbus properties as an
implementation of an interface, de-coupling from dbus.
Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I81a2c5100833235811d4b7e59152d70585c7abaf
diff --git a/ipmi/dbus_mode.cpp b/ipmi/dbus_mode.cpp
new file mode 100644
index 0000000..76b4eba
--- /dev/null
+++ b/ipmi/dbus_mode.cpp
@@ -0,0 +1,77 @@
+/**
+ * Copyright 2017 Google Inc.
+ *
+ * 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.
+ */
+
+#include <ipmid/api.h>
+
+#include <sdbusplus/bus.hpp>
+#include <sdbusplus/message.hpp>
+
+#include <cstdint>
+#include <string>
+
+namespace pid_control
+{
+namespace ipmi
+{
+
+static constexpr auto objectPath = "/xyz/openbmc_project/settings/fanctrl/zone";
+static constexpr auto busName = "xyz.openbmc_project.State.FanCtrl";
+static constexpr auto intf = "xyz.openbmc_project.Control.Mode";
+static constexpr auto manualProperty = "Manual";
+static constexpr auto failsafeProperty = "FailSafe";
+static constexpr auto propertiesintf = "org.freedesktop.DBus.Properties";
+
+using Property = std::string;
+using Value = std::variant<bool>;
+using PropertyMap = std::map<Property, Value>;
+
+/* The following was copied directly from my manual thread handler. */
+static std::string getControlPath(int8_t zone)
+{
+ return std::string(objectPath) + std::to_string(zone);
+}
+
+uint8_t getFanCtrlProperty(uint8_t zoneId, bool* value,
+ const std::string& property)
+{
+ std::string path = getControlPath(zoneId);
+
+ auto propertyReadBus = sdbusplus::bus::new_system();
+ auto pimMsg = propertyReadBus.new_method_call(busName, path.c_str(),
+ propertiesintf, "GetAll");
+ pimMsg.append(intf);
+
+ try
+ {
+ PropertyMap propMap;
+
+ /* a method could error but the call not error. */
+ auto valueResponseMsg = propertyReadBus.call(pimMsg);
+
+ valueResponseMsg.read(propMap);
+
+ *value = std::get<bool>(propMap[property]);
+ }
+ catch (const sdbusplus::exception::SdBusError& ex)
+ {
+ return IPMI_CC_INVALID;
+ }
+
+ return IPMI_CC_OK;
+}
+
+} // namespace ipmi
+} // namespace pid_control