Struct trust_dns_resolver::config::ResolverOpts

pub struct ResolverOpts {
    pub ndots: usize,
    pub timeout: Duration,
    pub attempts: usize,
    pub validate: bool,
    pub ip_strategy: LookupIpStrategy,
    pub cache_size: usize,
    pub use_hosts_file: bool,
    pub positive_min_ttl: Option<Duration>,
    pub negative_min_ttl: Option<Duration>,
    pub positive_max_ttl: Option<Duration>,
    pub negative_max_ttl: Option<Duration>,
    pub distrust_nx_responses: bool,
    pub num_concurrent_reqs: usize,
    // some fields omitted
}

Configuration for the Resolver

Fields

ndots: usize

Sets the number of dots that must appear (unless it's a final dot representing the root) that must appear before a query is assumted to include the TLD. The default is one, which means that www would never be assumed to be a TLD, and would always be appended to either the search

timeout: Duration

Specify the timeout for a request. Defaults to 5 seconds

attempts: usize

Number of attempts before giving up. Defaults to 2

validate: bool

Use DNSSec to validate the request

ip_strategy: LookupIpStrategy

The ip_strategy for the Resolver to use when lookup Ipv4 or Ipv6 addresses

cache_size: usize

Cache size is in number of records (some records can be large)

use_hosts_file: bool

Check /ect/hosts file before dns requery (only works for unix like OS)

positive_min_ttl: Option<Duration>

Optional minimum TTL for positive responses.

If this is set, any positive responses with a TTL lower than this value will have a TTL of positive_min_ttl instead. Otherwise, this will default to 0 seconds.

negative_min_ttl: Option<Duration>

Optional minimum TTL for negative (NXDOMAIN) responses.

If this is set, any positive responses with a TTL lower than this value will have a TTL of negative_min_ttl instead. Otherwise, this will default to 0 seconds.

positive_max_ttl: Option<Duration>

Optional maximum TTL for positive responses.

If this is set, any positive responses with a TTL higher than this value will have a TTL of positive_max_ttl instead. Otherwise, this will default to MAX_TTL seconds.

negative_max_ttl: Option<Duration>

Optional maximum TTL for negative (NXDOMAIN) responses.

If this is set, any positive responses with a TTL higher than this value will have a TTL of negative_max_ttl instead. Otherwise, this will default to MAX_TTL seconds.

distrust_nx_responses: bool

Default is to distrust negative responses from upstream nameservers

Currently only SERVFAIL responses are continued on, this may be expanded to include NXDOMAIN or NoError/Empty responses

num_concurrent_reqs: usize

Concurrent requests where more than one Nameserver is registered, the default is 2

0 or 1 will configure this to execute all requests serially

Trait Implementations

impl PartialEq<ResolverOpts> for ResolverOpts

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

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

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

This method tests for !=.

impl Clone for ResolverOpts

fn clone(&self) -> ResolverOpts

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for ResolverOpts

fn default() -> Self

Default values for the Reolver configuration.

This follows the resolv.conf defaults as defined in the Linux man pages

impl Eq for ResolverOpts

impl Copy for ResolverOpts

impl Debug for ResolverOpts

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

Formats the value using the given formatter.