From a41d8bfc8749ae9fe26f778e161c863fe31343cc Mon Sep 17 00:00:00 2001
From: Kevin Matz <kevin@company235.com>
Date: Thu, 18 May 2023 15:51:13 -0400
Subject: [PATCH] enforce base classes on header and data segments

---
 protocol/esta/acn/pdu.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/protocol/esta/acn/pdu.h b/protocol/esta/acn/pdu.h
index 5e4effc..0f015da 100644
--- a/protocol/esta/acn/pdu.h
+++ b/protocol/esta/acn/pdu.h
@@ -186,6 +186,8 @@ public:
   template<class T>
   void createHeader()
   {
+    static_assert(std::is_base_of<pdu_header, T>::value,
+                  "type parameter of PDU::createHeader must derive from ACN::pdu_header");
     if (!flags_.hasHeader)
       return;                               // doesn't get a header segment, inherits
     if (header_)
@@ -200,6 +202,8 @@ public:
   template<class T>
   void createData()
   {
+    static_assert(std::is_base_of<pdu_data, T>::value,
+                  "type parameter of PDU::createData must derive from ACN::pdu_data");
     if (!flags_.hasData)
       return;                               // doesn't get a data segment, inherits
     if (data_)