Struct libp2p_dns::ResolverConfig

pub struct ResolverConfig { /* private fields */ }

Configuration for the upstream nameservers to use for resolution

Implementations

impl ResolverConfig

pub fn new() -> ResolverConfig

Creates a new empty configuration

pub fn google() -> ResolverConfig

Creates a default configuration, using 8.8.8.8, 8.8.4.4 and 2001:4860:4860::8888, 2001:4860:4860::8844 (thank you, Google).

Please see Google’s privacy statement for important information about what they track, many ISP’s track similar information in DNS. To use the system configuration see: Resolver::from_system_conf and AsyncResolver::from_system_conf

NameServerConfigGroups can be combined to use a set of different providers, see NameServerConfigGroup and ResolverConfig::from_parts

pub fn cloudflare() -> ResolverConfig

Creates a default configuration, using 1.1.1.1, 1.0.0.1 and 2606:4700:4700::1111, 2606:4700:4700::1001 (thank you, Cloudflare).

Please see: https://www.cloudflare.com/dns/

NameServerConfigGroups can be combined to use a set of different providers, see NameServerConfigGroup and ResolverConfig::from_parts

pub fn cloudflare_tls() -> ResolverConfig

Available on crate feature dns-over-tls only.

Creates a configuration, using 1.1.1.1, 1.0.0.1 and 2606:4700:4700::1111, 2606:4700:4700::1001 (thank you, Cloudflare). This limits the registered connections to just TLS lookups

Please see: https://www.cloudflare.com/dns/

NameServerConfigGroups can be combined to use a set of different providers, see NameServerConfigGroup and ResolverConfig::from_parts

pub fn cloudflare_https() -> ResolverConfig

Available on crate feature dns-over-https only.

Creates a configuration, using 1.1.1.1, 1.0.0.1 and 2606:4700:4700::1111, 2606:4700:4700::1001 (thank you, Cloudflare). This limits the registered connections to just HTTPS lookups

Please see: https://www.cloudflare.com/dns/

NameServerConfigGroups can be combined to use a set of different providers, see NameServerConfigGroup and ResolverConfig::from_parts

pub fn quad9() -> ResolverConfig

Creates a configuration, using 9.9.9.9, 149.112.112.112 and 2620:fe::fe, 2620:fe::fe:9, the “secure” variants of the quad9 settings (thank you, Quad9).

Please see: https://www.quad9.net/faq/

NameServerConfigGroups can be combined to use a set of different providers, see NameServerConfigGroup and ResolverConfig::from_parts

pub fn quad9_tls() -> ResolverConfig

Available on crate feature dns-over-tls only.

Creates a configuration, using 9.9.9.9, 149.112.112.112 and 2620:fe::fe, 2620:fe::fe:9, the “secure” variants of the quad9 settings. This limits the registered connections to just TLS lookups

Please see: https://www.quad9.net/faq/

NameServerConfigGroups can be combined to use a set of different providers, see NameServerConfigGroup and ResolverConfig::from_parts

pub fn quad9_https() -> ResolverConfig

Available on crate feature dns-over-https only.

Creates a configuration, using 9.9.9.9, 149.112.112.112 and 2620:fe::fe, 2620:fe::fe:9, the “secure” variants of the quad9 settings. This limits the registered connections to just HTTPS lookups

Please see: https://www.quad9.net/faq/

NameServerConfigGroups can be combined to use a set of different providers, see NameServerConfigGroup and ResolverConfig::from_parts

pub fn from_parts<G>(
    domain: Option<Name>,
    search: Vec<Name, Global>,
    name_servers: G
) -> ResolverConfigwhere
    G: Into<NameServerConfigGroup>,

Create a ResolverConfig with all parts specified

Arguments

• domain - domain of the entity querying results. If the Name being looked up is not an FQDN, then this is the first part appended to attempt a lookup. ndots in the ResolverOption does take precedence over this.
• search - additional search domains that are attempted if the Name is not found in domain, defaults to vec![]
• name_servers - set of name servers to use for lookups, defaults are Google: 8.8.8.8, 8.8.4.4 and 2001:4860:4860::8888, 2001:4860:4860::8844

pub fn domain(&self) -> Option<&Name>

Returns the local domain

By default any names will be appended to all non-fully-qualified-domain names, and searched for after any ndots rules

pub fn set_domain(&mut self, domain: Name)

Set the domain of the entity querying results.

pub fn search(&self) -> &[Name]

Returns the search domains

These will be queried after any local domain and then in the order of the set of search domains

pub fn add_search(&mut self, search: Name)

Add a search domain

pub fn add_name_server(&mut self, name_server: NameServerConfig)

Add the configuration for a name server

pub fn name_servers(&self) -> &[NameServerConfig]

Returns a reference to the name servers

pub fn client_config(&self) -> &Option<TlsClientConfig>

Available on crate feature dns-over-rustls only.

return the associated TlsClientConfig

pub fn set_tls_client_config(&mut self, client_config: Arc<ClientConfig>)

Available on crate feature dns-over-rustls only.

adds the rustls::ClientConf for every configured NameServer of the Resolver.

use std::sync::Arc;

use rustls::{ClientConfig, ProtocolVersion, RootCertStore, OwnedTrustAnchor};
use trust_dns_resolver::config::ResolverConfig;
use webpki_roots;

let mut root_store = RootCertStore::empty();
root_store.add_server_trust_anchors(webpki_roots::TLS_SERVER_ROOTS.0.iter().map(|ta| {
    OwnedTrustAnchor::from_subject_spki_name_constraints(
        ta.subject,
        ta.spki,
        ta.name_constraints,
    )
}));

let mut client_config = ClientConfig::builder()
    .with_safe_default_cipher_suites()
    .with_safe_default_kx_groups()
    .with_protocol_versions(&[&rustls::version::TLS12])
    .unwrap()
    .with_root_certificates(root_store)
    .with_no_client_auth();

let mut resolver_config = ResolverConfig::quad9_tls();
resolver_config.set_tls_client_config(Arc::new(client_config));

Trait Implementations

impl Clone for ResolverConfig

fn clone(&self) -> ResolverConfig

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ResolverConfig

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

Formats the value using the given formatter.

impl Default for ResolverConfig

fn default() -> ResolverConfig

Creates a default configuration, using 8.8.8.8, 8.8.4.4 and 2001:4860:4860::8888, 2001:4860:4860::8844 (thank you, Google).

Please see Google’s privacy statement for important information about what they track, many ISP’s track similar information in DNS. To use the system configuration see: Resolver::from_system_conf and AsyncResolver::from_system_conf

impl PartialEq<ResolverConfig> for ResolverConfig

fn eq(&self, other: &ResolverConfig) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for ResolverConfig

impl StructuralEq for ResolverConfig

impl StructuralPartialEq for ResolverConfig