pub trait IpSub<RHS = Self> {
type Output;
fn saturating_sub(self, rhs: RHS) -> Self::Output;
}Expand description
Provides a saturating_sub() method for Ipv4Addr and Ipv6Addr.
Subtracting an integer from an IP address returns the modified IP
address. A u32 may be subtracted from an IPv4 address and a u128
may be subtracted from an IPv6 address.
Subtracting an IP address from another IP address of the same type
returns an integer of the appropriate width. A u32 for IPv4 and a
u128 for IPv6. Subtracting IP addresses is useful for getting
the range between two IP addresses.
Examples
use std::net::{Ipv4Addr, Ipv6Addr};
use ipnet::IpSub;
let min: Ipv4Addr = "0.0.0.0".parse().unwrap();
let ip1: Ipv4Addr = "192.168.1.5".parse().unwrap();
let ip2: Ipv4Addr = "192.168.1.100".parse().unwrap();
assert_eq!(min.saturating_sub(ip1), 0);
assert_eq!(ip2.saturating_sub(ip1), 95);
assert_eq!(min.saturating_sub(5), min);
assert_eq!(ip2.saturating_sub(95), ip1);
let min: Ipv6Addr = "::".parse().unwrap();
let ip1: Ipv6Addr = "fd00::5".parse().unwrap();
let ip2: Ipv6Addr = "fd00::64".parse().unwrap();
assert_eq!(min.saturating_sub(ip1), 0);
assert_eq!(ip2.saturating_sub(ip1), 95);
assert_eq!(min.saturating_sub(5u128), min);
assert_eq!(ip2.saturating_sub(95u128), ip1);