Fix issue for dnn with dot

src/common/utils/string.cpp

@@ -173,6 +173,30 @@ bool util::string_to_dotted(const std::string& str, std::string& dotted) {
   return true;
 };
 
+bool util::dotted_to_string(const std::string& dot, std::string& no_dot) {
+  // uint8_t should be enough, but uint16 if length > 255.
+  uint16_t offset = 0;
+  bool result     = true;
+  no_dot          = {};
+
+  while (offset < dot.length()) {
+    if (dot[offset] < 64) {
+      if ((offset + dot[offset]) <= dot.length()) {
+        if (offset) {
+          no_dot.push_back('.');
+        }
+        no_dot.append(&dot[offset + 1], dot[offset]);
+      }
+      offset = offset + 1 + dot[offset];
+    } else {
+      // should not happen, consume bytes
+      no_dot.push_back(dot[offset++]);
+      result = false;
+    }
+  }
+  return result;
+};
+
 void util::string_to_dnn(const std::string& str, bstring bstr) {
   bstr->slen = str.length();
   memcpy((void*) bstr->data, (void*) str.c_str(), str.length());

src/common/utils/string.hpp

@@ -62,6 +62,7 @@ void ipv4v6_to_pdu_address_information(
 
 void string_to_bstring(const std::string& str, bstring bstr);
 bool string_to_dotted(const std::string& str, std::string& dotted);
+bool dotted_to_string(const std::string& dot, std::string& no_dot);
 void string_to_dnn(const std::string& str, bstring bstr);
 }  // namespace util
 #endif

src/smf_app/smf_app.cpp

@@ -868,6 +868,9 @@ void smf_app::handle_pdu_session_create_sm_context_request(
   // authorization by the external DN
 
   // Step 3. check if the DNN requested is valid
+  std::string nd_dnn;
+  util::dotted_to_string(dnn, nd_dnn);
+  dnn = nd_dnn;
   if (not smf_cfg.is_dotted_dnn_handled(dnn, pdu_session_type)) {
     // Not a valid request...
     Logger::smf_app().warn(