Struct ResolvConf

pub struct ResolvConf {
    pub servers: Vec<ServerConf>,
    pub options: ResolvOptions,
}

Resolver configuration.

This type collects all information necessary to configure how a stub resolver talks to its upstream resolvers.

The type follows the builder pattern. After creating a value with ResolvConf::new you can manipulate the members. Once you are happy with them, you call finalize to make sure the configuration is valid. It mostly just fixes the servers.

Additionally, the type can parse a glibc-style configuration file, commonly known as /etc/resolv.conf through the parse and parse_file methods. You still need to call finalize after parsing.

The easiest way, however, to get the system resolver configuration is through ResolvConf::default. This will parse the configuration file or return a default configuration if that fails.

Fields

servers: Vec<ServerConf>

Addresses of servers to query.

options: ResolvOptions

Default options.

Implementations

impl ResolvConf

Management

pub fn new() -> Self

Creates a new, empty configuration.

Using an empty configuration will fail since it does not contain any name servers. Call Self::finalize to make it usable.

pub fn finalize(&mut self)

Finalizes the configuration for actual use.

The function does two things. If servers is empty, it adds 127.0.0.1:53. This is exactly what glibc does. If search is empty, it adds the root domain ".". This differs from what glibc does which considers the machine’s host name.

impl ResolvConf

Parsing Configuration File

pub fn parse_file<P: AsRef<Path>>(&mut self, path: P) -> Result<(), Error>

Parses the configuration from a file.

pub fn parse<R: Read>(&mut self, reader: &mut R) -> Result<(), Error>

Parses the configuration from a reader.

The format is that of the `/etc/resolv.conf`` file.

Trait Implementations

impl Clone for ResolvConf

fn clone(&self) -> ResolvConf

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResolvConf

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

Formats the value using the given formatter.

impl Default for ResolvConf

fn default() -> Self

Creates a default configuration for this system.

XXX This currently only works for Unix-y systems.

impl Display for ResolvConf

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

Formats the value using the given formatter.