Not posssible to send SDO frames via UDP with maximum UDP payload (1472 bytes)

Not posssible to send SDO frames via UDP with maximum UDP payload (1472 bytes).

This is due to a bug in the LWIP core implementation. The function Lwip_Buf_Alloc calls internally the core function pbuf_alloc() with the parameter layer=PBUF_TRANSPORT. This causes that the LWIP core tries always to allocate a TCP/IP frame (1472 bytes user payload + 20 Bytes TCP + 20 bytes IP + 14 Bytes Ethernet = 1522 bytes).