# Struct std::net::Ipv4Addr [−] [src]

    pub struct Ipv4Addr {
        // some fields omitted
    }

Representation of an IPv4 address.

## Methods

### `impl Ipv4Addr`

#### `fn new(a: u8, b: u8, c: u8, d: u8) -> Ipv4Addr`

Creates a new IPv4 address from four eight-bit octets.

The result will represent the IP address `a`.`b`.`c`.`d`.

#### `fn octets(&self) -> [u8; 4]`

Returns the four eight-bit integers that make up this address.

#### `fn is_unspecified(&self) -> bool`

Unstable (`ip` #27709)

: extra functionality has not been scrutinized to the level that it should be stable

Returns true for the special 'unspecified' address 0.0.0.0.

#### `fn is_loopback(&self) -> bool`

Returns true if this is a loopback address (127.0.0.0/8).

This property is defined by RFC 6890

#### `fn is_private(&self) -> bool`

Returns true if this is a private address.

The private address ranges are defined in RFC1918 and include:

- 10.0.0.0/8
- 172.16.0.0/12
- 192.168.0.0/16

#### `fn is_link_local(&self) -> bool`

Returns true if the address is link-local (169.254.0.0/16).

This property is defined by RFC 6890

#### `fn is_global(&self) -> bool`

Unstable (`ip` #27709)

: extra functionality has not been scrutinized to the level that it should be stable

Returns true if the address appears to be globally routable.

The following return false:

- private address (10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16)
- the loopback address (127.0.0.0/8)
- the link-local address (169.254.0.0/16)
- the broadcast address (255.255.255.255/32)
- test addresses used for documentation (192.0.2.0/24, 198.51.100.0/24 and 203.0.113.0/24)

#### `fn is_multicast(&self) -> bool`

Returns true if this is a multicast address.

Multicast addresses have a most significant octet between 224 and 239, and is defined by RFC 5771

#### `fn is_broadcast(&self) -> bool`

Returns true if this is a broadcast address.

A broadcast address has all octets set to 255 as defined in RFC 919.

#### `fn is_documentation(&self) -> bool`

Returns true if this address is in a range designated for documentation.

This is defined in RFC 5737:

- 192.0.2.0/24 (TEST-NET-1)
- 198.51.100.0/24 (TEST-NET-2)
- 203.0.113.0/24 (TEST-NET-3)

#### `fn to_ipv6_compatible(&self) -> Ipv6Addr`

Converts this address to an IPv4-compatible IPv6 address.

a.b.c.d becomes ::a.b.c.d

#### `fn to_ipv6_mapped(&self) -> Ipv6Addr`

Converts this address to an IPv4-mapped IPv6 address.

a.b.c.d becomes ::ffff:a.b.c.d

## Trait Implementations

### `impl Display for Ipv4Addr`

#### `fn fmt(&self, fmt: &mut Formatter) -> Result`

### `impl Debug for Ipv4Addr`

#### `fn fmt(&self, fmt: &mut Formatter) -> Result`

### `impl Clone for Ipv4Addr`

#### `fn clone(&self) -> Ipv4Addr`

#### `fn clone_from(&mut self, source: &Self)`

### `impl PartialEq for Ipv4Addr`

#### `fn eq(&self, other: &Ipv4Addr) -> bool`

#### `fn ne(&self, other: &Rhs) -> bool`

### `impl Eq for Ipv4Addr`

### `impl Hash for Ipv4Addr`

#### `fn hash<H: Hasher>(&self, s: &mut H)`

#### `fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher`

### `impl PartialOrd for Ipv4Addr`

#### `fn partial_cmp(&self, other: &Ipv4Addr) -> Option<Ordering>`

#### `fn lt(&self, other: &Rhs) -> bool`

#### `fn le(&self, other: &Rhs) -> bool`

#### `fn gt(&self, other: &Rhs) -> bool`

#### `fn ge(&self, other: &Rhs) -> bool`

### `impl Ord for Ipv4Addr`

#### `fn cmp(&self, other: &Ipv4Addr) -> Ordering`

### `impl From<u32> for Ipv4Addr`

#### `fn from(ip: u32) -> Ipv4Addr`

### `impl FromStr for Ipv4Addr`

#### `type Err = AddrParseError`

#### `fn from_str(s: &str) -> Result<Ipv4Addr, AddrParseError>`

### Derived Implementations

### `impl Copy for Ipv4Addr`

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