0.22.0

Added

• EthernetClass::setDHCPEnabled(flag) enables or disables the DHCP client. May be called either before or after Ethernet has started.
• EthernetClass::isDHCPEnabled() returns whether the DHCP client is enabled. Valid whether Ethernet has been started or not.
• New LinkWatcher example.
• Added support for building for unsupported boards via a new bare lwIP driver.

Changed

• Limit the number of times enet_proc_input() can loop to twice the ring size.
• Limit UDP output size to the maximum possible (65535 - 28(total header)).
• It's now possible to know when adding or removing a MAC address filter failed.
• Make it possible to disable and exclude DHCP, DNS, IGMP, TCP, and UDP.
• Changed EthernetClass::setMACAddress(mac) to use the built-in MAC address if the given array is NULL.
• Changed EthernetClass::begin(mac) to wait for an IP address. The default is a 60-second timeout. There's also a new, optional, timeout parameter for specifying that timeout. This change makes the API match the Arduino Ethernet API.
• Renamed enet_getmac(mac) to enet_get_mac(mac).
• Better NULL argument checking.
• Simplified ServerWithListeners example.
• Changed enet_init(...) to return a bool for detecting init. failure.

Fixed

• Fixed how EthernetClient functions work when there's a pending connect triggered by connectNoWait().
• Fixed how raw frame size limits are checked. Padding is already handled by the MAC.
• Fixed compilation if LWIP_IGMP is disabled, including making LWIP_MDNS_RESPONDER dependent on LWIP_IGMP (in addition to LWIP_UDP).
• Improved trng_is_started() by adding an additional check for the "OK to stop" bit. It now works at system startup if the clock is already running.