Adds whoAmI method to ModSecurity class

The method returns information about the ModSecurity's version and the platform
that it was compiled. Further it will be used by the audit logs and by the
connectors. msc_who_am_i was added accordingly, to the C api.

src/modsecurity.cc

@@ -17,6 +17,7 @@
 #include <iostream>
 
 #include "modsecurity/modsecurity.h"
+#include "src/config.h"
 #include "src/unique_id.h"
 
 
@@ -43,6 +44,63 @@ ModSecurity::ModSecurity() {
 }
 
 
+/**
+ * @name    whoAmI
+ * @brief   Return information about this ModSecurity version and platform.
+ *
+ * Platform and version are two questions that community will ask prior to
+ * provide support. Making it available internally and to the connector as
+ * well.
+ *
+ * @note This information maybe will be used by a log parser. If you want to
+ *       update it, make it in a fashion that won't break the existent parsers.
+ *       (e.g. adding extra information _only_ to the end of the string)
+ */
+std::string ModSecurity::whoAmI() {
+    std::string platform("Unknown platform");
+
+#if AIX
+    platform = "AIX";
+#elif LINUX
+    platform = "Linux";
+#elif OPENBSD
+    platform = "OpenBSD";
+#elif SOLARIS
+    platform = "Solaris";
+#elif HPUX
+    platform = "HPUX";
+#elif MACOSX
+    platform = "MacOSX";
+#elif FREEBSD
+    platform = "FreeBSD";
+#elif NETBSD
+    platform = "NetBSD";
+#elif WIN32
+    platform = "Windows";
+#endif
+
+    return std::string("ModSecurity v" MODSECURITY_VERSION \
+        " (" + platform + ")");
+}
+
+
+/**
+ * @name    msc_who_am_i
+ * @brief   Return information about this ModSecurity version and platform.
+ *
+ * Platform and version are two questions that community will ask prior to
+ * provide support. Making it available internally and to the connector as
+ * well.
+ *
+ * @note This information maybe will be used by a log parser. If you want to
+ *       update it, make it in a fashion that won't break the existent parsers.
+ *       (e.g. adding extra information _only_ to the end of the string)
+ */
+extern "C" const char *msc_who_am_i(ModSecurity *msc) {
+    return msc->whoAmI().c_str();
+}
+
+
 /**
  * @name    msc_init
  * @brief   Initilizes ModSecurity C API
@@ -62,6 +120,4 @@ extern "C" ModSecurity *msc_init() {
     return modsec;
 }
 
-
-
 }  // namespace ModSecurity