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Discv5State

ethrex_p2p::discv5::server

Struct Discv5State 

Source 
pub struct Discv5State {
    pub counter: u32,
    pub pending_by_nonce: FxHashMap<[u8; 12], (Node, Message, Instant)>,
    pub pending_challenges: FxHashMap<H256, (Vec<u8>, Instant, Vec<u8>)>,
    pub whoareyou_rate_limit: LruCache<(IpAddr, H256), Instant>,
    pub whoareyou_global_count: u32,
    pub whoareyou_global_window_start: Instant,
    pub session_ips: FxHashMap<H256, IpAddr>,
    pub ip_votes: FxHashMap<IpAddr, FxHashSet<H256>>,
    pub ip_vote_period_start: Option<Instant>,
    pub first_ip_vote_round_completed: bool,
    pub active_lookups: Vec<IterativeLookup>,
}
Expand description

Discv5-specific state held within the unified DiscoveryServer.

Fields§

§counter: u32

Outgoing message count, used for nonce generation as per the spec.

§pending_by_nonce: FxHashMap<[u8; 12], (Node, Message, Instant)>

Pending outgoing messages awaiting WhoAreYou response, keyed by nonce.

§pending_challenges: FxHashMap<H256, (Vec<u8>, Instant, Vec<u8>)>

Pending WhoAreYou challenges awaiting Handshake response, keyed by src_id. Tuple: (challenge_data, timestamp, encoded_packet_bytes).

§whoareyou_rate_limit: LruCache<(IpAddr, H256), Instant>

Tracks last WHOAREYOU send time per (source IP, node ID) to prevent amplification attacks.

§whoareyou_global_count: u32

Global WHOAREYOU rate limit: count of packets sent in the current second.

§whoareyou_global_window_start: Instant

Start of the current global rate limit window.

§session_ips: FxHashMap<H256, IpAddr>

Tracks the source IP that each session was established from.

§ip_votes: FxHashMap<IpAddr, FxHashSet<H256>>

Collects recipient_addr IPs from PONGs for external IP detection via majority voting.

§ip_vote_period_start: Option<Instant>

When the current IP voting period started. None if no votes received yet.

§first_ip_vote_round_completed: bool

Whether the first (fast) voting round has completed.

§active_lookups: Vec<IterativeLookup>

Currently active iterative lookups.

Implementations§

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impl Discv5State

Source

pub fn next_nonce<R: RngCore>(&mut self, rng: &mut R) -> [u8; 12]

Generates a 96-bit AES-GCM nonce. Encodes the current outgoing message count into the first 32 bits and fills the remaining 64 bits with random data.

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pub fn cleanup_stale_entries(&mut self) -> Option<IpAddr>

Remove stale entries from caches. Returns Some(ip) if a timed-out IP voting round produced a winning IP to apply.

Source

pub fn record_ip_vote( &mut self, reported_ip: IpAddr, voter_id: H256, ) -> Option<IpAddr>

Records an IP vote from a PONG recipient_addr. Returns Some(ip) if the voting round ended with a winning IP to apply.

Source

pub fn is_private_ip(ip: IpAddr) -> bool

Returns true if the IP is private/local (not useful for external connectivity).

Trait Implementations§

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impl Debug for Discv5State

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

Formats the value using the given formatter. Read more
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impl Default for Discv5State

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fn default() -> Self

Returns the “default value” for a type. Read more

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