diff -uar gz-transport-gz-transport12_12.2.2.orig/include/gz/transport/detail/Node.hh gz-transport-gz-transport12_12.2.2.new/include/gz/transport/detail/Node.hh
--- gz-transport-gz-transport12_12.2.2.orig/include/gz/transport/detail/Node.hh	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/include/gz/transport/detail/Node.hh	2025-07-07 17:22:46.438115379 +0800
@@ -34,7 +34,7 @@
         const std::string &_topic,
         const AdvertiseMessageOptions &_options)
     {
-      return this->Advertise(_topic, MessageT().GetTypeName(), _options);
+      return this->Advertise(_topic, std::string(MessageT().GetTypeName()), _options);
     }
 
     //////////////////////////////////////////////////
@@ -267,7 +267,7 @@
         this->Shared()->myReplierAddress,
         this->Shared()->replierId.ToString(),
         this->Shared()->pUuid, this->NodeUuid(),
-        RequestT().GetTypeName(), ReplyT().GetTypeName(), _options);
+        std::string(RequestT().GetTypeName()), std::string(ReplyT().GetTypeName()), _options);
 
       if (!this->Shared()->AdvertisePublisher(publisher))
       {
@@ -420,8 +420,8 @@
         std::lock_guard<std::recursive_mutex> lk(this->Shared()->mutex);
         localResponserFound = this->Shared()->repliers.FirstHandler(
               fullyQualifiedTopic,
-              RequestT().GetTypeName(),
-              ReplyT().GetTypeName(),
+              std::string(RequestT().GetTypeName()),
+              std::string(ReplyT().GetTypeName()),
               repHandler);
       }
 
@@ -458,7 +458,7 @@
         if (this->Shared()->TopicPublishers(fullyQualifiedTopic, addresses))
         {
           this->Shared()->SendPendingRemoteReqs(fullyQualifiedTopic,
-            RequestT().GetTypeName(), ReplyT().GetTypeName());
+            std::string(RequestT().GetTypeName()), std::string(ReplyT().GetTypeName()));
         }
         else
         {
@@ -551,7 +551,7 @@
       // If the responser is within my process.
       IRepHandlerPtr repHandler;
       if (this->Shared()->repliers.FirstHandler(fullyQualifiedTopic,
-        _request.GetTypeName(), _reply.GetTypeName(), repHandler))
+        std::string(_request.GetTypeName()), std::string(_reply.GetTypeName()), repHandler))
       {
         // There is a responser in my process, let's use it.
         _result = repHandler->RunLocalCallback(_request, _reply);
@@ -567,7 +567,7 @@
       if (this->Shared()->TopicPublishers(fullyQualifiedTopic, addresses))
       {
         this->Shared()->SendPendingRemoteReqs(fullyQualifiedTopic,
-          _request.GetTypeName(), _reply.GetTypeName());
+          std::string(_request.GetTypeName()), std::string(_reply.GetTypeName()));
       }
       else
       {
diff -uar gz-transport-gz-transport12_12.2.2.orig/include/gz/transport/RepHandler.hh gz-transport-gz-transport12_12.2.2.new/include/gz/transport/RepHandler.hh
--- gz-transport-gz-transport12_12.2.2.orig/include/gz/transport/RepHandler.hh	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/include/gz/transport/RepHandler.hh	2025-07-07 17:19:25.149117798 +0800
@@ -142,9 +142,14 @@
         }
 
 #if GOOGLE_PROTOBUF_VERSION >= 4022000
-        auto msgReq =
-          google::protobuf::internal::DownCast<const Req*>(&_msgReq);
-        auto msgRep = google::protobuf::internal::DownCast<Rep*>(&_msgRep);
+        auto msgReq = dynamic_cast<const Req*>(&_msgReq);
+        auto msgRep = dynamic_cast<Rep*>(&_msgRep);
+        if (!msgReq || !msgRep)
+        {
+          std::cerr << "RepHandler::RunLocalCallback() error: "
+                    << "dynamic_cast failed" << std::endl;
+          return false;
+        }
 #elif GOOGLE_PROTOBUF_VERSION > 2999999
         auto msgReq = google::protobuf::down_cast<const Req*>(&_msgReq);
         auto msgRep = google::protobuf::down_cast<Rep*>(&_msgRep);
@@ -193,13 +198,13 @@
       // Documentation inherited.
       public: virtual std::string ReqTypeName() const
       {
-        return Req().GetTypeName();
+        return std::string(Req().GetTypeName());
       }
 
       // Documentation inherited.
       public: virtual std::string RepTypeName() const
       {
-        return Rep().GetTypeName();
+        return std::string(Rep().GetTypeName());
       }
 
       /// \brief Create a specific protobuf message given its serialized data.
diff -uar gz-transport-gz-transport12_12.2.2.orig/include/gz/transport/ReqHandler.hh gz-transport-gz-transport12_12.2.2.new/include/gz/transport/ReqHandler.hh
--- gz-transport-gz-transport12_12.2.2.orig/include/gz/transport/ReqHandler.hh	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/include/gz/transport/ReqHandler.hh	2025-07-07 17:14:56.341121030 +0800
@@ -285,13 +285,13 @@
       // Documentation inherited.
       public: virtual std::string ReqTypeName() const
       {
-        return Req().GetTypeName();
+        return std::string(Req().GetTypeName());
       }
 
       // Documentation inherited.
       public: virtual std::string RepTypeName() const
       {
-        return Rep().GetTypeName();
+        return std::string(Rep().GetTypeName());
       }
 
       /// \brief Protobuf message containing the request's parameters.
@@ -382,7 +382,7 @@
       public: virtual std::string ReqTypeName() const
       {
         if (this->reqMsg)
-          return this->reqMsg->GetTypeName();
+          return std::string(this->reqMsg->GetTypeName());
         else
         {
           std::cerr << "ReqHandler::ReqTypeName() Warning: Using ReqTypeName() "
@@ -395,7 +395,7 @@
       public: virtual std::string RepTypeName() const
       {
         if (this->repMsg)
-          return this->repMsg->GetTypeName();
+          return std::string(this->repMsg->GetTypeName());
         else
         {
           std::cerr << "ReqHandler::RepTypeName() Warning: Using RepTypeName() "
diff -uar gz-transport-gz-transport12_12.2.2.orig/include/gz/transport/SubscriptionHandler.hh gz-transport-gz-transport12_12.2.2.new/include/gz/transport/SubscriptionHandler.hh
--- gz-transport-gz-transport12_12.2.2.orig/include/gz/transport/SubscriptionHandler.hh	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/include/gz/transport/SubscriptionHandler.hh	2025-07-07 17:13:08.673122324 +0800
@@ -184,7 +184,7 @@
       // Documentation inherited.
       public: std::string TypeName()
       {
-        return T().GetTypeName();
+        return std::string(T().GetTypeName());
       }
 
       /// \brief Set the callback for this handler.
@@ -211,7 +211,13 @@
           return true;
 
 #if GOOGLE_PROTOBUF_VERSION >= 4022000
-        auto msgPtr = google::protobuf::internal::DownCast<const T*>(&_msg);
+        auto msgPtr = dynamic_cast<const T*>(&_msg);
+        if (!msgPtr)
+        {
+          std::cerr << "SubscriptionHandler::RunLocalCallback() error: "
+                    << "dynamic_cast failed" << std::endl;
+          return false;
+        }
 #elif GOOGLE_PROTOBUF_VERSION >= 3000000
         auto msgPtr = google::protobuf::down_cast<const T*>(&_msg);
 #else
diff -uar gz-transport-gz-transport12_12.2.2.orig/parameters/src/Client.cc gz-transport-gz-transport12_12.2.2.new/parameters/src/Client.cc
--- gz-transport-gz-transport12_12.2.2.orig/parameters/src/Client.cc	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/parameters/src/Client.cc	2025-07-07 17:27:01.814112309 +0800
@@ -216,7 +216,7 @@
     return ParameterResult{
       ParameterResultType::InvalidType,
       _parameterName,
-      _msg.GetDescriptor()->name()};
+      std::string(_msg.GetDescriptor()->name())};
   }
   return ParameterResult{ParameterResultType::Unexpected, _parameterName};
 }
diff -uar gz-transport-gz-transport12_12.2.2.orig/parameters/src/Registry.cc gz-transport-gz-transport12_12.2.2.new/parameters/src/Registry.cc
--- gz-transport-gz-transport12_12.2.2.orig/parameters/src/Registry.cc	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/parameters/src/Registry.cc	2025-07-07 17:28:17.423111400 +0800
@@ -144,7 +144,7 @@
       auto * decl = _res.add_parameter_declarations();
       decl->set_name(paramPair.first);
       decl->set_type(addGzMsgsPrefix(
-        paramPair.second->GetDescriptor()->name()));
+        std::string(paramPair.second->GetDescriptor()->name())));
     }
   }
   return true;
@@ -238,7 +238,7 @@
   const std::string & _parameterName,
   const google::protobuf::Message & _msg)
 {
-  auto protoType = addGzMsgsPrefix(_msg.GetDescriptor()->name());
+  auto protoType = addGzMsgsPrefix(std::string(_msg.GetDescriptor()->name()));
   auto newParam = gz::msgs::Factory::New(protoType);
   if (!newParam) {
     return ParameterResult{
@@ -264,8 +264,8 @@
       ParameterResultType::NotDeclared,
       _parameterName};
   }
-  const auto & newProtoType = _parameter.GetDescriptor()->name();
-  const auto & protoType = it->second->GetDescriptor()->name();
+  const auto & newProtoType = std::string(_parameter.GetDescriptor()->name());
+  const auto & protoType = std::string(it->second->GetDescriptor()->name());
   if (newProtoType != protoType) {
     return ParameterResult{
       ParameterResultType::InvalidType,
@@ -289,7 +289,7 @@
       ParameterResultType::NotDeclared,
       _parameterName};
   }
-  const auto & protoType = it->second->GetDescriptor()->name();
+  const auto & protoType = std::string(it->second->GetDescriptor()->name());
   _parameter = gz::msgs::Factory::New(protoType);
   if (!_parameter) {
     return ParameterResult{
@@ -320,7 +320,7 @@
     return ParameterResult{
       ParameterResultType::InvalidType,
       _parameterName,
-      addGzMsgsPrefix(it->second->GetDescriptor()->name())};
+      addGzMsgsPrefix(std::string(it->second->GetDescriptor()->name()))};
   }
   it->second = std::move(_value);
   return ParameterResult{ParameterResultType::Success};
diff -uar gz-transport-gz-transport12_12.2.2.orig/src/CIface_TEST.cc gz-transport-gz-transport12_12.2.2.new/src/CIface_TEST.cc
--- gz-transport-gz-transport12_12.2.2.orig/src/CIface_TEST.cc	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/src/CIface_TEST.cc	2025-07-07 17:17:13.756119378 +0800
@@ -96,7 +96,7 @@
   msg.SerializeToArray(buffer, size);
 
   EXPECT_EQ(0,
-    gzTransportPublish(node, topic, buffer, msg.GetTypeName().c_str()));
+    gzTransportPublish(node, topic, buffer, std::string(msg.GetTypeName()).c_str()));
 
   EXPECT_EQ(2, count);
 
@@ -105,7 +105,7 @@
   // Unsubscribe
   ASSERT_EQ(0, gzTransportUnsubscribe(node, topic));
   EXPECT_EQ(0,
-    gzTransportPublish(node, topic, buffer, msg.GetTypeName().c_str()));
+    gzTransportPublish(node, topic, buffer, std::string(msg.GetTypeName()).c_str()));
   EXPECT_EQ(0, count);
 
   free(buffer);
@@ -153,12 +153,12 @@
 
   // Publish on "bar" partition
   EXPECT_EQ(0,
-    gzTransportPublish(nodeBar, topic, buffer, msg.GetTypeName().c_str()));
+    gzTransportPublish(nodeBar, topic, buffer, std::string(msg.GetTypeName()).c_str()));
   EXPECT_EQ(1, count);
 
   // Publish on default partition
   EXPECT_EQ(0,
-    gzTransportPublish(nodeBar, topic, buffer, msg.GetTypeName().c_str()));
+    gzTransportPublish(nodeBar, topic, buffer, std::string(msg.GetTypeName()).c_str()));
   EXPECT_EQ(2, count);
 
   count = 0;
@@ -166,7 +166,7 @@
   // Unsubscribe
   ASSERT_EQ(0, gzTransportUnsubscribe(nodeBar, topic));
   EXPECT_EQ(0,
-    gzTransportPublish(nodeBar, topic, buffer, msg.GetTypeName().c_str()));
+    gzTransportPublish(nodeBar, topic, buffer, std::string(msg.GetTypeName()).c_str()));
   EXPECT_EQ(0, count);
 
   free(buffer);
diff -uar gz-transport-gz-transport12_12.2.2.orig/src/cmd/gz.cc gz-transport-gz-transport12_12.2.2.new/src/cmd/gz.cc
--- gz-transport-gz-transport12_12.2.2.orig/src/cmd/gz.cc	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/src/cmd/gz.cc	2025-07-07 17:23:28.582114872 +0800
@@ -162,7 +162,7 @@
   {
     // Create the node and advertise the topic
     Node node;
-    auto pub = node.Advertise(_topic, msg->GetTypeName());
+    auto pub = node.Advertise(_topic, std::string(msg->GetTypeName()));
 
     // Publish the message
     if (pub)
diff -uar gz-transport-gz-transport12_12.2.2.orig/src/HandlerStorage_TEST.cc gz-transport-gz-transport12_12.2.2.new/src/HandlerStorage_TEST.cc
--- gz-transport-gz-transport12_12.2.2.orig/src/HandlerStorage_TEST.cc	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/src/HandlerStorage_TEST.cc	2025-07-07 17:17:46.532118984 +0800
@@ -67,8 +67,8 @@
   msgs::Int32 rep1Msg;
   bool result;
   msgs::Vector3d reqMsg;
-  std::string reqType = reqMsg.GetTypeName();
-  std::string rep1Type = rep1Msg.GetTypeName();
+  std::string reqType = std::string(reqMsg.GetTypeName());
+  std::string rep1Type = std::string(rep1Msg.GetTypeName());
 
   reqMsg.set_x(1.0);
   reqMsg.set_y(2.0);
@@ -232,7 +232,7 @@
   EXPECT_FALSE(subs.FirstHandler(topic, "incorrect type", handler));
 
   // Now try to retrieve the first callback with the correct type.
-  EXPECT_TRUE(subs.FirstHandler(topic, msg.GetTypeName(), handler));
+  EXPECT_TRUE(subs.FirstHandler(topic, std::string(msg.GetTypeName()), handler));
 
   // Verify the handler.
   EXPECT_EQ(handler->TypeName(), sub1HandlerPtr->TypeName());
diff -uar gz-transport-gz-transport12_12.2.2.orig/src/Node.cc gz-transport-gz-transport12_12.2.2.new/src/Node.cc
--- gz-transport-gz-transport12_12.2.2.orig/src/Node.cc	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/src/Node.cc	2025-07-07 17:14:16.412121510 +0800
@@ -418,7 +418,7 @@
     };
 
     if (!this->dataPtr->shared->Publish(this->dataPtr->publisher.Topic(),
-          msgBuffer, msgSize, myDeallocator, _msg.GetTypeName()))
+          msgBuffer, msgSize, myDeallocator, std::string(_msg.GetTypeName())))
     {
       return false;
     }
diff -uar gz-transport-gz-transport12_12.2.2.orig/src/Node_TEST.cc gz-transport-gz-transport12_12.2.2.new/src/Node_TEST.cc
--- gz-transport-gz-transport12_12.2.2.orig/src/Node_TEST.cc	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/src/Node_TEST.cc	2025-07-07 17:20:54.837116720 +0800
@@ -346,8 +346,8 @@
     // Request a valid service using RequestRaw.
     std::string reqStr, repStr, repTypeName;
     req.SerializeToString(&reqStr);
-    EXPECT_TRUE(this->node.RequestRaw(g_topic, reqStr, req.GetTypeName(),
-          rep.GetTypeName(), timeout, repStr, result));
+    EXPECT_TRUE(this->node.RequestRaw(g_topic, reqStr, std::string(req.GetTypeName()),
+          std::string(rep.GetTypeName()), timeout, repStr, result));
     rep.ParseFromString(repStr);
     ASSERT_TRUE(result);
     EXPECT_EQ(rep.data(), data);
@@ -541,7 +541,7 @@
   EXPECT_TRUE(node1.SubscribedTopics().empty());
   EXPECT_TRUE(node1.AdvertisedServices().empty());
 
-  auto pub1 = node1.Advertise(g_topic, msg.GetTypeName());
+  auto pub1 = node1.Advertise(g_topic, std::string(msg.GetTypeName()));
   EXPECT_TRUE(pub1);
 
   auto advertisedTopics = node1.AdvertisedTopics();
@@ -730,7 +730,7 @@
   std::this_thread::sleep_for(std::chrono::milliseconds(100));
 
   // Publish a first message.
-  EXPECT_TRUE(pub.PublishRaw(msg.SerializeAsString(), msg.GetTypeName()));
+  EXPECT_TRUE(pub.PublishRaw(msg.SerializeAsString(), std::string(msg.GetTypeName())));
 
   // Give some time to the subscribers.
   std::this_thread::sleep_for(std::chrono::milliseconds(100));
@@ -741,7 +741,7 @@
   reset();
 
   // Publish a second message on topic.
-  EXPECT_TRUE(pub.PublishRaw(msg.SerializeAsString(), msg.GetTypeName()));
+  EXPECT_TRUE(pub.PublishRaw(msg.SerializeAsString(), std::string(msg.GetTypeName())));
 
   // Give some time to the subscribers.
   std::this_thread::sleep_for(std::chrono::milliseconds(100));
@@ -770,7 +770,7 @@
   std::this_thread::sleep_for(std::chrono::milliseconds(100));
 
   // Publish a first message.
-  EXPECT_TRUE(pub.PublishRaw(msg.SerializeAsString(), msg.GetTypeName()));
+  EXPECT_TRUE(pub.PublishRaw(msg.SerializeAsString(), std::string(msg.GetTypeName())));
 
   // Give some time to the subscribers.
   std::this_thread::sleep_for(std::chrono::milliseconds(100));
@@ -781,7 +781,7 @@
   reset();
 
   // Publish a second message on topic.
-  EXPECT_TRUE(pub.PublishRaw(msg.SerializeAsString(), msg.GetTypeName()));
+  EXPECT_TRUE(pub.PublishRaw(msg.SerializeAsString(), std::string(msg.GetTypeName())));
 
   // Give some time to the subscribers.
   std::this_thread::sleep_for(std::chrono::milliseconds(100));
diff -uar gz-transport-gz-transport12_12.2.2.orig/test/integration/test_executables/twoProcsPubSubSubscriber_aux.cc gz-transport-gz-transport12_12.2.2.new/test/integration/test_executables/twoProcsPubSubSubscriber_aux.cc
--- gz-transport-gz-transport12_12.2.2.orig/test/integration/test_executables/twoProcsPubSubSubscriber_aux.cc	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/test/integration/test_executables/twoProcsPubSubSubscriber_aux.cc	2025-07-07 17:26:12.086112907 +0800
@@ -100,7 +100,7 @@
 
   // Add a raw subscription to `node`
   EXPECT_TRUE(node.SubscribeRaw(g_topic, cbRaw,
-                                msgs::Vector3d().GetTypeName()));
+                                std::string(msgs::Vector3d().GetTypeName())));
 
   int interval = 100;
 
diff -uar gz-transport-gz-transport12_12.2.2.orig/test/integration/twoProcsPubSub.cc gz-transport-gz-transport12_12.2.2.new/test/integration/twoProcsPubSub.cc
--- gz-transport-gz-transport12_12.2.2.orig/test/integration/twoProcsPubSub.cc	2024-11-08 04:08:54.000000000 +0800
+++ gz-transport-gz-transport12_12.2.2.new/test/integration/twoProcsPubSub.cc	2025-07-07 17:24:30.918114123 +0800
@@ -166,7 +166,7 @@
   // Publish messages for a few seconds
   for (auto i = 0; i < 10; ++i)
   {
-    EXPECT_TRUE(pub.PublishRaw(msg.SerializeAsString(), msg.GetTypeName()));
+    EXPECT_TRUE(pub.PublishRaw(msg.SerializeAsString(), std::string(msg.GetTypeName())));
     std::this_thread::sleep_for(std::chrono::milliseconds(500));
   }
 }
@@ -204,7 +204,7 @@
 
   transport::Node node;
   EXPECT_TRUE(node.SubscribeRaw(g_topic, cbRaw,
-                                msgs::Int32().GetTypeName()));
+                                std::string(msgs::Int32().GetTypeName())));
 
   // Wait some time before publishing.
   std::this_thread::sleep_for(std::chrono::milliseconds(1500));
@@ -290,7 +290,7 @@
   transport::Node node3;
   EXPECT_TRUE(node1.SubscribeRaw(g_topic, wrongCb, "wrong.msg.type"));
   EXPECT_TRUE(node2.SubscribeRaw(g_topic, correctCb,
-                                 msgs::Vector3d().GetTypeName()));
+                                 std::string(msgs::Vector3d().GetTypeName())));
   EXPECT_TRUE(node3.SubscribeRaw(g_topic, genericCb));