Enum ServerName

#[non_exhaustive]
pub enum ServerName<'a> {
    DnsName(DnsName<'a>),
    IpAddress(IpAddr),
}

Encodes ways a client can know the expected name of the server.

This currently covers knowing the DNS name of the server, but will be extended in the future to supporting privacy-preserving names for the server (“ECH”). For this reason this enum is non_exhaustive.

Making one

If you have a DNS name as a &str, this type implements TryFrom<&str>, so you can do:

ServerName::try_from("example.com").expect("invalid DNS name");

If you have an owned String, you can use TryFrom directly:

let name = "example.com".to_string();
#[cfg(feature = "alloc")]
ServerName::try_from(name).expect("invalid DNS name");

which will yield a ServerName<'static> if successful.

or, alternatively…

let x: ServerName = "example.com".try_into().expect("invalid DNS name");

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

DnsName(DnsName<'a>)

The server is identified by a DNS name. The name is sent in the TLS Server Name Indication (SNI) extension.

IpAddress(IpAddr)

The server is identified by an IP address. SNI is not done.

Implementations

impl<'a> ServerName<'a>

pub fn to_owned(&self) -> ServerName<'static>

Available on crate feature alloc only.

Produce an owned ServerName from this (potentially borrowed) ServerName.

pub fn to_str(&self) -> Cow<'_, str>

Available on crate feature std only.

Return the string representation of this ServerName.

In the case of a ServerName::DnsName instance, this function returns a borrowed str. For a ServerName::IpAddress instance it returns an allocated String.

Trait Implementations

impl<'a> Clone for ServerName<'a>

fn clone(&self) -> ServerName<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for ServerName<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl From<IpAddr> for ServerName<'_>

fn from(addr: IpAddr) -> ServerName<'_>

Converts to this type from the input type.

impl From<IpAddr> for ServerName<'_>

Available on crate feature std only.

fn from(addr: IpAddr) -> ServerName<'_>

Converts to this type from the input type.

impl From<Ipv4Addr> for ServerName<'_>

fn from(v4: Ipv4Addr) -> ServerName<'_>

Converts to this type from the input type.

impl From<Ipv4Addr> for ServerName<'_>

Available on crate feature std only.

fn from(v4: Ipv4Addr) -> ServerName<'_>

Converts to this type from the input type.

impl From<Ipv6Addr> for ServerName<'_>

fn from(v6: Ipv6Addr) -> ServerName<'_>

Converts to this type from the input type.

impl From<Ipv6Addr> for ServerName<'_>

Available on crate feature std only.

fn from(v6: Ipv6Addr) -> ServerName<'_>

Converts to this type from the input type.

impl<'a> Hash for ServerName<'a>

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'a> PartialEq for ServerName<'a>

fn eq(&self, other: &ServerName<'a>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> TryFrom<&'a [u8]> for ServerName<'a>

type Error = InvalidDnsNameError

The type returned in the event of a conversion error.

fn try_from( value: &'a [u8], ) -> Result<ServerName<'a>, <ServerName<'a> as TryFrom<&'a [u8]>>::Error>

Performs the conversion.

impl<'a> TryFrom<&'a str> for ServerName<'a>

Attempt to make a ServerName from a string by parsing as a DNS name or IP address.

type Error = InvalidDnsNameError

The type returned in the event of a conversion error.

fn try_from( s: &'a str, ) -> Result<ServerName<'a>, <ServerName<'a> as TryFrom<&'a str>>::Error>

Performs the conversion.

impl TryFrom<String> for ServerName<'static>

Available on crate feature alloc only.

type Error = InvalidDnsNameError

The type returned in the event of a conversion error.

fn try_from( value: String, ) -> Result<ServerName<'static>, <ServerName<'static> as TryFrom<String>>::Error>

Performs the conversion.

impl<'a> Eq for ServerName<'a>

impl<'a> StructuralPartialEq for ServerName<'a>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes

Size for each variant:

• DnsName: 31 bytes
• IpAddress: 17 bytes