fixed and improved ui

Source/Components/Interfaces/UDPStream/UDPSServer.cpp

@@ -18,6 +18,10 @@
 
 namespace MARTe {
 
+/* Out-of-line definitions for class-scope static const members that are
+ * ODR-used (e.g. passed through varargs in REPORT_ERROR). */
+const uint32 UDPSServer::UDPS_SERVER_MAX_UDP_PAYLOAD;
+
 // ---------------------------------------------------------------------------
 // Constructor / Destructor
 // ---------------------------------------------------------------------------
@@ -88,6 +92,16 @@ bool UDPSServer::Initialise(StructuredDataI &data) {
 
   uint32 mps = UDPS_SERVER_DEFAULT_MAX_PAYLOAD;
   (void)data.Read("MaxPayloadSize", mps);
+  /* A payload larger than the largest legal UDP datagram cannot be sent —
+   * sendto would fail with EMSGSIZE and the whole cycle would be dropped. */
+  if (mps > UDPS_SERVER_MAX_UDP_PAYLOAD) {
+    REPORT_ERROR_STATIC(ErrorManagement::Warning,
+                        "UDPSServer: MaxPayloadSize %u exceeds the UDP datagram "
+                        "limit (%u); clamping to %u.",
+                        mps, UDPS_SERVER_MAX_UDP_PAYLOAD,
+                        UDPS_SERVER_MAX_UDP_PAYLOAD);
+    mps = UDPS_SERVER_MAX_UDP_PAYLOAD;
+  }
   maxPayloadSize = mps;
 
   uint32 timeoutSecs = UDPS_SERVER_DEFAULT_CLIENT_TIMEOUT_S;