Enum NatType 

pub enum NatType {
    None,
    FullCone,
    AddressRestricted,
    PortRestricted,
    Symmetric,
    Unknown,
}

Best-effort NAT behavior hint for the node.

In the current implementation this is derived from native QUIC reachability and address-mapping observations, not from classic STUN-based NAT behavior discovery. Treat it as a debug/telemetry hint, not authoritative NAT classification.

These labels are compatibility-oriented and should not be read as a full RFC 3489/RFC 5780 NAT classification unless explicitly backed by protocol-level behavior measurements.

Variants

None

Compatibility-oriented label for paths that appeared not to require NAT traversal.

This indicates the observed path did not require NAT traversal. It does not, by itself, prove current direct reachability to other peers.

FullCone

Compatibility-oriented label for direct-only native connectivity observations.

The current implementation does not prove RFC-style full-cone mapping or filtering behaviour before surfacing this value.

AddressRestricted

Compatibility-oriented label reserved for address-restricted behaviour.

The current node-level heuristic does not distinguish this variant from other cone-like behaviours.

PortRestricted

Compatibility-oriented label for mixed direct and relay-assisted outcomes.

The current implementation does not prove RFC-style port-restricted filtering behaviour before surfacing this value.

Symmetric

Compatibility-oriented label for likely endpoint-dependent mapping behaviour.

This is derived from native QUIC observations and is used as a relay optimization hint, not a complete NAT classification.

Unknown

NAT behavior hint not yet determined

The node has not yet gathered enough native connectivity evidence.

Trait Implementations

impl Clone for NatType

fn clone(&self) -> NatType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for NatType

impl Debug for NatType

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

Formats the value using the given formatter.

impl Default for NatType

fn default() -> NatType

Returns the “default value” for a type.

impl Display for NatType

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

Formats the value using the given formatter.

impl Eq for NatType

impl Hash for NatType

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

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 PartialEq for NatType

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for NatType