mDNS
mDNS stands for Multicast Domain
Name System.
mDNS is a variation of DNS service, which is a form of
domain name resolution.
When an mDNS client needs to resolve a hostname, it sends an
IP multicast query message
that asks the host that has that name to identify itself.
An mDNS message is a multicast UDP packet sent using the following addressing:
If ipconfigUSE_DNS and
ipconfigUSE_MDNS are set to 1 in
FreeRTOSIPConfig.h then the FreeRTOS-Plus-TCP API function
FreeRTOS_gethostbyname() can be used to resolve a text name
to an IP address when the hostname has a postfix ".local".
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