RFC 6762 - Multicast DNS
RFC 6763 - DNS-Based Service Discovery
You need to increase MEMP_NUM_SYS_TIMEOUT by one if you use MDNS!
Things left to implement:
- Sending goodbye messages (zero ttl) - shutdown, DHCP lease about to expire, DHCP turned off...
- Sending negative responses NSEC
- Fragmenting replies if required
- Individual known answer detection for all local IPv6 addresses
- Dynamic size of outgoing packet