fdsdump: add information element manager singleton

Author: sedmicha

src/tools/fdsdump/src/common/CMakeLists.txt

@@ -6,6 +6,7 @@ set(COMMON_SRC
     filelist.cpp
     flowProvider.cpp
     ipaddr.cpp
+    ieMgr.cpp
 )
 
 add_library(common_obj OBJECT ${COMMON_SRC})

src/tools/fdsdump/src/common/ieMgr.cpp

@@ -0,0 +1,36 @@
+/**
+ * @file
+ * @author Michal Sedlak <[email protected]>
+ * @brief Information element manager singleton
+ */
+
+#include <common/ieMgr.hpp>
+
+#include <string>
+#include <stdexcept>
+
+namespace fdsdump {
+
+IEMgr &
+IEMgr::instance()
+{
+    static IEMgr iemgr;
+    return iemgr;
+}
+
+IEMgr::IEMgr() :
+    m_iemgr(fds_iemgr_create(), &fds_iemgr_destroy)
+{
+    if (!m_iemgr) {
+        throw std::runtime_error("fds_iemgr_create() has failed");
+    }
+
+    const std::string dir = fds_api_cfg_dir();
+    int ret = fds_iemgr_read_dir(m_iemgr.get(), dir.c_str());
+    if (ret != FDS_OK) {
+        const std::string err_msg = fds_iemgr_last_err(m_iemgr.get());
+        throw std::runtime_error("fds_iemgr_read_dir() failed: " + err_msg);
+    }
+}
+
+} // fdsdump

src/tools/fdsdump/src/common/ieMgr.hpp

@@ -0,0 +1,33 @@
+/**
+ * @file
+ * @author Michal Sedlak <[email protected]>
+ * @brief Information element manager singleton
+ */
+
+#pragma once
+
+#include <libfds.h>
+
+#include <memory>
+
+namespace fdsdump {
+
+class IEMgr {
+public:
+    /**
+     * @brief Get the iemgr singleton instance
+     */
+    static IEMgr &instance();
+
+    /**
+     * @brief Get the pointer to the underlying fds_iemgr
+     */
+    fds_iemgr_t *ptr() { return m_iemgr.get(); }
+
+private:
+    std::unique_ptr<fds_iemgr_t, decltype(&fds_iemgr_destroy)> m_iemgr;
+
+    IEMgr();
+};
+
+} // fdsdump