Function ip_calc 

pub fn ip_calc(query: &str) -> String

IPv4/IPv6 address inspector and CIDR subnet calculator — offline, instant.

Commands: <ip> — classify: class, private/public, loopback, etc. <ip>/<prefix> — CIDR subnet info: network, broadcast, mask, range, host count contains <cidr> <ip> — test if IP is inside a subnet range <ip1> <ip2> — count IPs in range, suggest CIDR mask <mask> — convert dotted-decimal mask to prefix length and back