Struct ipnet::Ipv4Net

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pub struct Ipv4Net { /* private fields */ }

Expand description

An IPv4 network address.

See IpNet for a type encompassing both IPv4 and IPv6 network addresses.

§Textual representation

Ipv4Net provides a FromStr implementation for parsing network addresses represented in CIDR notation. See IETF RFC 4632 for the CIDR notation.

§Examples

use std::net::Ipv4Addr;
use ipnet::Ipv4Net;

let net: Ipv4Net = "10.1.1.0/24".parse().unwrap();
assert_eq!(Ok(net.network()), "10.1.1.0".parse());

Implementations§

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impl Ipv4Net

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pub fn new(ip: Ipv4Addr, prefix_len: u8) -> Result<Ipv4Net, PrefixLenError>

Creates a new IPv4 network address from an Ipv4Addr and prefix length.

§Examples

use std::net::Ipv4Addr;
use ipnet::{Ipv4Net, PrefixLenError};

let net = Ipv4Net::new(Ipv4Addr::new(10, 1, 1, 0), 24);
assert!(net.is_ok());

let bad_prefix_len = Ipv4Net::new(Ipv4Addr::new(10, 1, 1, 0), 33);
assert_eq!(bad_prefix_len, Err(PrefixLenError));

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pub fn trunc(&self) -> Ipv4Net

Returns a copy of the network with the address truncated to the prefix length.

§Examples

assert_eq!(
    "192.168.12.34/16".parse::<Ipv4Net>().unwrap().trunc(),
    "192.168.0.0/16".parse().unwrap()
);

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pub fn addr(&self) -> Ipv4Addr

Returns the address.

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pub fn prefix_len(&self) -> u8

Returns the prefix length.

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pub fn max_prefix_len(&self) -> u8

Returns the maximum valid prefix length.

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pub fn netmask(&self) -> Ipv4Addr

Returns the network mask.

§Examples

let net: Ipv4Net = "10.1.0.0/20".parse().unwrap();
assert_eq!(Ok(net.netmask()), "255.255.240.0".parse());

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pub fn hostmask(&self) -> Ipv4Addr

Returns the host mask.

§Examples

let net: Ipv4Net = "10.1.0.0/20".parse().unwrap();
assert_eq!(Ok(net.hostmask()), "0.0.15.255".parse());

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pub fn network(&self) -> Ipv4Addr

Returns the network address.

§Examples

let net: Ipv4Net = "172.16.123.123/16".parse().unwrap();
assert_eq!(Ok(net.network()), "172.16.0.0".parse());

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pub fn broadcast(&self) -> Ipv4Addr

Returns the broadcast address.

§Examples

let net: Ipv4Net = "172.16.0.0/22".parse().unwrap();
assert_eq!(Ok(net.broadcast()), "172.16.3.255".parse());

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pub fn supernet(&self) -> Option<Ipv4Net>

Returns the Ipv4Net that contains this one.

§Examples

let n1: Ipv4Net = "172.16.1.0/24".parse().unwrap();
let n2: Ipv4Net = "172.16.0.0/23".parse().unwrap();
let n3: Ipv4Net = "172.16.0.0/0".parse().unwrap();

assert_eq!(n1.supernet().unwrap(), n2);
assert_eq!(n3.supernet(), None);

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pub fn is_sibling(&self, other: &Ipv4Net) -> bool

Returns true if this network and the given network are children of the same supernet.

§Examples

let n1: Ipv4Net = "10.1.0.0/24".parse().unwrap();
let n2: Ipv4Net = "10.1.1.0/24".parse().unwrap();
let n3: Ipv4Net = "10.1.2.0/24".parse().unwrap();

assert!(n1.is_sibling(&n2));
assert!(!n2.is_sibling(&n3));

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pub fn hosts(&self) -> Ipv4AddrRange ⓘ

Return an Iterator over the host addresses in this network.

If the prefix length is less than 31 both the network address and broadcast address are excluded. These are only valid host addresses when the prefix length is 31.

§Examples

let net: Ipv4Net = "10.0.0.0/30".parse().unwrap();
assert_eq!(net.hosts().collect::<Vec<Ipv4Addr>>(), vec![
    "10.0.0.1".parse::<Ipv4Addr>().unwrap(),
    "10.0.0.2".parse().unwrap(),
]);

let net: Ipv4Net = "10.0.0.0/31".parse().unwrap();
assert_eq!(net.hosts().collect::<Vec<Ipv4Addr>>(), vec![
    "10.0.0.0".parse::<Ipv4Addr>().unwrap(),
    "10.0.0.1".parse().unwrap(),
]);

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pub fn subnets(&self, new_prefix_len: u8) -> Result<Ipv4Subnets, PrefixLenError>

Returns an Iterator over the subnets of this network with the given prefix length.

§Examples

let net: Ipv4Net = "10.0.0.0/24".parse().unwrap();
assert_eq!(net.subnets(26).unwrap().collect::<Vec<Ipv4Net>>(), vec![
    "10.0.0.0/26".parse::<Ipv4Net>().unwrap(),
    "10.0.0.64/26".parse().unwrap(),
    "10.0.0.128/26".parse().unwrap(),
    "10.0.0.192/26".parse().unwrap(),
]);

let net: Ipv4Net = "10.0.0.0/30".parse().unwrap();
assert_eq!(net.subnets(32).unwrap().collect::<Vec<Ipv4Net>>(), vec![
    "10.0.0.0/32".parse::<Ipv4Net>().unwrap(),
    "10.0.0.1/32".parse().unwrap(),
    "10.0.0.2/32".parse().unwrap(),
    "10.0.0.3/32".parse().unwrap(),
]);

let net: Ipv4Net = "10.0.0.0/24".parse().unwrap();
assert_eq!(net.subnets(23), Err(PrefixLenError));

let net: Ipv4Net = "10.0.0.0/24".parse().unwrap();
assert_eq!(net.subnets(33), Err(PrefixLenError));

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pub fn contains<T>(&self, other: T) -> bool
where Self: Contains<T>,

Test if a network address contains either another network address or an IP address.

§Examples

let net: Ipv4Net = "192.168.0.0/24".parse().unwrap();
let net_yes: Ipv4Net = "192.168.0.0/25".parse().unwrap();
let net_no: Ipv4Net = "192.168.0.0/23".parse().unwrap();
let ip_yes: Ipv4Addr = "192.168.0.1".parse().unwrap();
let ip_no: Ipv4Addr = "192.168.1.0".parse().unwrap();

assert!(net.contains(&net));
assert!(net.contains(&net_yes));
assert!(!net.contains(&net_no));
assert!(net.contains(&ip_yes));
assert!(!net.contains(&ip_no));

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pub fn aggregate(networks: &Vec<Ipv4Net>) -> Vec<Ipv4Net>

Aggregate a Vec of Ipv4Nets and return the result as a new Vec.

§Examples

let nets = vec![
    "10.0.0.0/24".parse::<Ipv4Net>().unwrap(),
    "10.0.1.0/24".parse().unwrap(),
    "10.0.2.0/24".parse().unwrap(),
];

assert_eq!(Ipv4Net::aggregate(&nets), vec![
    "10.0.0.0/23".parse::<Ipv4Net>().unwrap(),
    "10.0.2.0/24".parse().unwrap(),
]);