--- test_etcp_simple_traffic.c.backup
+++ test_etcp_simple_traffic.c
@@ -172,19 +172,25 @@
     DEBUG_INFO(DEBUG_CATEGORY_ETCP, "SIMULATE RX: inst=%s, len=%u", 
                 inst->is_server ? "server" : "client", len);
     
-    // Create a mock ETCP_DGRAM for processing
-    struct ETCP_DGRAM mock_dgram;
-    memset(&mock_dgram, 0, sizeof(mock_dgram));
-    mock_dgram.link = NULL; // Will be set by connection processing
-    mock_dgram.data_len = len > 1500 ? 1500 : len;
-    mock_dgram.timestamp = get_current_timestamp();
-    if (mock_dgram.data_len > 0) {
-        memcpy(mock_dgram.data, data, mock_dgram.data_len);
+    // Create a mock ETCP_DGRAM for processing with proper allocation
+    size_t dgram_size = sizeof(struct ETCP_DGRAM) + (len > 1500 ? 1500 : len);
+    struct ETCP_DGRAM* mock_dgram = malloc(dgram_size);
+    if (!mock_dgram) {
+        DEBUG_ERROR(DEBUG_CATEGORY_ETCP, "Failed to allocate mock dgram");
+        return;
+    }
+    memset(mock_dgram, 0, dgram_size);
+    mock_dgram->link = NULL; // Will be set by connection processing
+    mock_dgram->data_len = len > 1500 ? 1500 : len;
+    mock_dgram->timestamp = get_current_timestamp();
+    if (mock_dgram->data_len > 0) {
+        memcpy(mock_dgram->data, data, mock_dgram->data_len);
     }
     
     // Process through ETCP input
-    etcp_conn_input(&mock_dgram);
+    etcp_conn_input(mock_dgram);
+    
+    // Free the allocated memory
+    free(mock_dgram);
 }
 
 // Simulate packet transmission for analysis