Implemented better testing and fixed skipepd frames

Source/Components/Interfaces/UDPStream/UDPSClient.h

@@ -95,6 +95,12 @@ public:
     /** Default maximum payload size (bytes, excluding 17-byte header). */
     static const uint32 UDPS_CLIENT_DEFAULT_MAX_PAYLOAD = 1400u;
 
+    /** Default OS UDP receive socket buffer size (bytes). The Linux default
+     *  (rmem_default, typically ~208 KiB) is easily overrun by high-throughput
+     *  sources (e.g. multi-hundred-KiB bursts every few ms), causing silent
+     *  kernel-level datagram drops. 4 MiB gives generous burst headroom. */
+    static const uint32 UDPS_CLIENT_DEFAULT_RECV_BUFFER = 4194304u; // 4 MiB
+
     UDPSClient();
     virtual ~UDPSClient();
 
@@ -111,6 +117,7 @@ public:
      *  - MaxPayloadSize  (uint32) Max payload bytes per datagram, excluding header. Default 1400.
      *  - CPUMask         (uint32) CPU affinity mask for the receive thread. Default 0xFFFFFFFF.
      *  - StackSize       (uint32) Stack size for the receive thread. Default 65536.
+     *  - RecvBufferSize  (uint32) OS UDP receive socket buffer size (bytes). Default 4 MiB.
      */
     bool Initialise(StructuredDataI &data);
 
@@ -165,6 +172,9 @@ private:
     bool ConnectUnicast();
     bool ConnectMulticast();
 
+    /** Set the OS receive buffer size (SO_RCVBUF) on a UDP socket's raw handle. */
+    void SetRecvBufferSize(BasicUDPSocket &sock);
+
     void ProcessDatagram(const uint8 *buf, uint32 size);
     /** Read one full UDPS frame (header + payload) from the TCP control socket. */
     bool ReceiveTCPFrame();
@@ -188,6 +198,7 @@ private:
     uint32       maxPayloadSize;
     uint32       cpuMask;
     uint32       stackSize;
+    uint32       recvBufferSize;
 
     // -------------------------------------------------------------------------
     // Runtime state