RFC: one or more of CIDR/IP address manipulation functions

[jay7x]

I'd like to propose having extlib::parse_cidr() function which returns a Structure similar to what ipcalc.pl returns (with bit values stripped):

➜  ipcalc 192.168.0.0/24
Address:   192.168.0.0
Netmask:   255.255.255.0
Wildcard:  0.0.0.255
Network:   192.168.0.0/24
HostMin:   192.168.0.1
HostMax:   192.168.0.254
Broadcast: 192.168.0.255
Hosts/Net: 254

My original problem was to get first usable IP in a routable range I have.

Please add your ideas and use-cases in comments below

[jay7x]

I got some comments in Slack/IRC:

Lumiere
if you do that parse_cidr, I'd love it to also return the subnet_size (or whatever we want to word it) so "24" in that case (I know I could get it with split, but getting everything at once is nice)

libera - @kjetilho
Yury - I personally do this in Ruby code in ERB, but for EPP that would certainly be useful. I'd want "subnet_size: 24", to. HostMin is not useful for me - what is your usecase? where people put their routers vary quite a bit. it can even be .0, since no one uses zero broadcast anymore.
perhaps a separate function ipaddr_next(address, n) for the nth address after address?
the name ipaddr_add() is probably as intuitive - or more