Add application to configure rsyslog

The application implements the xyz.openbmc_project.Network.Client D-Bus
interface to set a remote rsyslog server's address and port in the
rsyslog config file.

This lets us configure rsyslog to be able to stream out logs.

TODO: Exception handling and validation will be handled in subsequent
commits.

Change-Id: I8917daab3f0de1806d2f1aafe99cb3a872f19184
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/phosphor-rsyslog-config/server-conf.hpp b/phosphor-rsyslog-config/server-conf.hpp
new file mode 100644
index 0000000..cb8882b
--- /dev/null
+++ b/phosphor-rsyslog-config/server-conf.hpp
@@ -0,0 +1,76 @@
+#pragma once
+
+#include <sdbusplus/bus.hpp>
+#include <sdbusplus/server/object.hpp>
+#include <string>
+#include "xyz/openbmc_project/Network/Client/server.hpp"
+
+namespace phosphor
+{
+namespace rsyslog_config
+{
+
+using NetworkClient = sdbusplus::xyz::openbmc_project::Network::server::Client;
+using Iface = sdbusplus::server::object::object<NetworkClient>;
+
+/** @class Server
+ *  @brief Configuration for rsyslog server
+ *  @details A concrete implementation of the
+ *  xyz.openbmc_project.Network.Client API, in order to
+ *  provide remote rsyslog server's address and port.
+ */
+class Server : public Iface
+{
+    public:
+        Server() = delete;
+        Server(const Server&) = delete;
+        Server& operator=(const Server&) = delete;
+        Server(Server&&) = delete;
+        Server& operator=(Server&&) = delete;
+        virtual ~Server() = default;
+
+        /** @brief Constructor to put object onto bus at a dbus path.
+         *  @param[in] bus - Bus to attach to.
+         *  @param[in] path - Path to attach at.
+         *  @param[in] filePath - rsyslog remote logging config file
+         */
+        Server(sdbusplus::bus::bus& bus,
+               const std::string& path,
+               const char* filePath) :
+            Iface(bus, path.c_str()),
+            configFilePath(filePath)
+        {
+        }
+
+        using NetworkClient::address;
+        using NetworkClient::port;
+
+        /** @brief Override that updates rsyslog config file as well
+         *  @param[in] value - remote server address
+         *  @returns value of changed address
+         */
+        virtual std::string address(std::string value) override;
+
+        /** @brief Override that updates rsyslog config file as well
+         *  @param[in] value - remote server port
+         *  @returns value of changed port
+         */
+        virtual uint16_t port(uint16_t value) override;
+
+    private:
+        /** @brief Update remote server address and port in
+         *         rsyslog config file.
+         *  @param[in] serverAddress - remote server address
+         *  @param[in] serverPort - remote server port
+         *  @param[in] filePath - rsyslog config file path
+         */
+        void writeConfig(
+                 const std::string& serverAddress,
+                 uint16_t serverPort,
+                 const char* filePath);
+
+        std::string configFilePath{};
+};
+
+} // namespace rsyslog_config
+} // namespace phosphor