eth_get_stat(eth_port, eth_stat) sends a message to the ethernet task requesting the statistics for the ethernet port eth_port, eth_get_stat()'s first parameter. If successful, the ethernet task fills in the fields of the struct eth_stat_t eth_stat, eth_get_stat()'s second parameter.
eth_get_stat() is called only from eth_ioctl() in response to an NWIOGETHSTAT request.