add a field to Packet to track unicast reply destination

protocol/artistic/artnet/device.cpp

@@ -50,16 +50,22 @@ Device::Device(Style style)
 /**
  * @brief Device::receive
  * @param buffer
+ * @param origin
  */
-void Device::receive(ACN::PDU::Stream buffer)
+void Device::receive(ACN::PDU::Stream buffer, ipAddress &origin)
 {
+    if (origin.port != UDP_PORT || origin.type != 1) // ACN::SDT::SDT_ADDR_IPV4
+        return buffer->setstate(std::ios_base::badbit);
+
     auto packet = std::make_shared<Packet>();
     packet->iStream(buffer);
     if (buffer->fail() || buffer->bad())
     {
         _report_code = RcParseFail;
         _report_text = "unable to read packet";
+        return;
     }
+    packet->originAddress = origin.address.ipv4.value;
     receive(packet);
 }
 

protocol/artistic/artnet/device.h

@@ -42,7 +42,7 @@ public:
 
   const Style styleCode;  //!< \cite ARTNET The Style code defines the equipment style of the device.
 
-  void receive(ACN::PDU::Stream);
+  void receive(ACN::PDU::Stream, ipAddress&);
   void receive(std::shared_ptr<Packet>);
 
   std::shared_ptr<void> setSender(const std::function<void(std::shared_ptr<bufferstream>,

protocol/artistic/artnet/packet.h

@@ -534,31 +534,28 @@ struct rdmsub_data
 struct Packet
   : public streamable
 {
-  /**
-   * @brief Packet
-   * @param opcode
-   * @param data
-   */
+  /// @brief Packet
+  /// @param opcode
+  /// @param data
   Packet(OpCode opcode = OpNull, std::shared_ptr<packet_data> data = nullptr)
     : _opcode(opcode)
     , _data(data)
   {}
 
-  /**
-   * @brief opcode
-   * @return
-   */
+  /// @brief opcode
+  /// @return
   OpCode opcode() const { return _opcode; }
 
-  /**
-   * @brief data
-   * @return
-   */
+  /// @brief IP address where unicast replies will be sent.
+  uint32_t originAddress;
+
+  /// @brief data
+  /// @return
   template<class T>
   auto data() const
   {
     static_assert(std::is_base_of<packet_data, T>::value,
-                  "type parameter of data must derive from ARTNET::packet_data");
+                  "type must inherit ARTNET::packet_data");
     return _data ? std::optional<std::shared_ptr<T>>{std::static_pointer_cast<T>(_data)}
                  : std::nullopt;
   }