/* Returns next buffer for TX. Can wait if no buffer available.  */
static unsigned char* enet_get_tx_buffer(struct ethernetif *ethernetif)
/* Returns next buffer for TX. Can wait if no buffer available.  */
static unsigned char* enet_get_tx_buffer(struct ethernetif *ethernetif)
{
    LWIP_UNUSED_ARG(ethernetif);
    static unsigned char ucBuffer[ENET_FRAME_MAX_FRAMELEN];
    return ucBuffer;
}