Struct RecursorOptions 

pub struct RecursorOptions {

    pub ns_cache_size: usize,
    pub response_cache_size: u64,
    pub recursion_limit: u8,
    pub ns_recursion_limit: u8,
    pub allow_answers: Vec<IpNet>,
    pub deny_answers: Vec<IpNet>,
    pub allow_server: Vec<IpNet>,
    pub deny_server: Vec<IpNet>,
    pub avoid_local_udp_ports: HashSet<u16>,
    pub cache_policy: TtlConfig,
    pub case_randomization: bool,
    pub opportunistic_encryption: OpportunisticEncryption,
    pub edns_payload_len: u16,
}

Available on crate feature recursor only.

Options for the Recursor

Fields

ns_cache_size: usize

Maximum nameserver cache size

response_cache_size: u64

Maximum DNS response cache size

recursion_limit: u8

Maximum recursion depth for queries

Setting to 0 will fail all requests requiring recursion.

ns_recursion_limit: u8

Maximum recursion depth for building NS pools

Setting to 0 will fail all requests requiring recursion.

allow_answers: Vec<IpNet>

Networks that will not be filtered from responses. This overrides anything present in deny_answers

deny_answers: Vec<IpNet>

Networks that will be filtered from responses

allow_server: Vec<IpNet>

Networks that will be queried during resolution

deny_server: Vec<IpNet>

Networks that will not be queried during resolution

avoid_local_udp_ports: HashSet<u16>

Local UDP ports to avoid when making outgoing queries

cache_policy: TtlConfig

Caching policy, setting minimum and maximum TTLs

case_randomization: bool

Enable case randomization.

Randomize the case of letters in query names, and require that responses preserve the case of the query name, in order to mitigate spoofing attacks. This is only applied over UDP.

This implements the mechanism described in draft-vixie-dnsext-dns0x20-00.

opportunistic_encryption: OpportunisticEncryption

Configure RFC 9539 opportunistic encryption.

edns_payload_len: u16

Configure the EDNS UDP payload size used in queries.

See DnsRequestOptions::edns_payload_len.

Trait Implementations

impl Clone for RecursorOptions

fn clone(&self) -> RecursorOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RecursorOptions

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

Formats the value using the given formatter.

impl Default for RecursorOptions

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for RecursorOptions

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for RecursorOptions

fn eq(&self, other: &RecursorOptions) -> 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 Eq for RecursorOptions

impl StructuralPartialEq for RecursorOptions