Merge branch 'fix_dnn_case_insensitive' into 'develop'

Use lower-case for DNN value (case insensitive)

See merge request oai/cn5g/oai-cn5g-amf!177

src/amf-app/amf_n1.cpp

@@ -3335,6 +3335,9 @@ void amf_n1::ul_nas_transport_handle(
       // TODO: use default DNN for the corresponding NSSAI
     }
 
+    // Use DNN as case insensitive
+    conv::to_lower(dnn);
+
     comUt::print_buffer(
         "amf_n1", "Decoded DNN Bit String", (uint8_t*) bdata(dnn),
         blength(dnn));

src/common/conversions.cpp

@@ -451,6 +451,15 @@ bool conv::octet_string_copy(
   return true;
 }
 
+//------------------------------------------------------------------------------
+void conv::to_lower(std::string& str) {
+  boost::algorithm::to_lower(str);
+}
+
+//------------------------------------------------------------------------------
+void conv::to_lower(bstring& b_str) {
+  btolower(b_str);
+}
 //------------------------------------------------------------------------------
 bool conv::check_bstring(const bstring& b_str) {
   if (b_str == nullptr || b_str->slen < 0 || b_str->data == nullptr)

src/common/conversions.hpp

@@ -89,6 +89,9 @@ class conv {
   static bool octet_string_copy(
       OCTET_STRING_t& destination, const OCTET_STRING_t& source);
 
+  static void to_lower(std::string& str);
+  static void to_lower(bstring& b_str);
+
   static bool check_bstring(const bstring& b_str);
   static bool check_octet_string(const OCTET_STRING_t& octet_str);