gethostbyaddr() function for esp32 in lwip

[sabxxx]

Has anyone seen a version of the gethostbyaddr() function for the esp32? It is similar to the lwip function gethostbyname() except that it takes an IP address and returns a hostname.

I tried looking in the lwip source but couldn't find it.

I'm trying to find the hostnames of all the devices on my home network.

Thanks,

Sanjay