35 lines
798 B
Rust
35 lines
798 B
Rust
// Get a unique hash value for a packet
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// Used in retransmit and shred fetch to prevent dos with same packet data.
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use ahash::AHasher;
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use rand::{thread_rng, Rng};
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use solana_perf::packet::Packet;
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use std::hash::Hasher;
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#[derive(Clone)]
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pub struct PacketHasher {
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seed1: u128,
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seed2: u128,
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}
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impl Default for PacketHasher {
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fn default() -> Self {
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Self {
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seed1: thread_rng().gen::<u128>(),
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seed2: thread_rng().gen::<u128>(),
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}
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}
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}
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impl PacketHasher {
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pub fn hash_packet(&self, packet: &Packet) -> u64 {
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let mut hasher = AHasher::new_with_keys(self.seed1, self.seed2);
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hasher.write(&packet.data[0..packet.meta.size]);
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hasher.finish()
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}
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pub fn reset(&mut self) {
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*self = Self::default();
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}
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}
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