142 lines
4.2 KiB
Rust
142 lines
4.2 KiB
Rust
//! The `packet` module defines data structures and methods to pull data from the network.
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use crate::{cuda_runtime::PinnedVec, recycler::Recycler};
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use serde::Serialize;
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pub use solana_sdk::packet::{Meta, Packet, PACKET_DATA_SIZE};
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use std::net::SocketAddr;
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pub const NUM_PACKETS: usize = 1024 * 8;
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pub const PACKETS_PER_BATCH: usize = 256;
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pub const NUM_RCVMMSGS: usize = 128;
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pub const PACKETS_BATCH_SIZE: usize = PACKETS_PER_BATCH * PACKET_DATA_SIZE;
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#[derive(Debug, Clone)]
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pub struct Packets {
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pub packets: PinnedVec<Packet>,
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}
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//auto derive doesn't support large arrays
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impl Default for Packets {
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fn default() -> Packets {
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let packets = PinnedVec::with_capacity(NUM_RCVMMSGS);
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Packets { packets }
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}
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}
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pub type PacketsRecycler = Recycler<PinnedVec<Packet>>;
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impl Packets {
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pub fn new(packets: Vec<Packet>) -> Self {
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let packets = PinnedVec::from_vec(packets);
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Self { packets }
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}
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pub fn new_with_recycler(recycler: PacketsRecycler, size: usize, name: &'static str) -> Self {
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let mut packets = recycler.allocate(name);
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packets.reserve_and_pin(size);
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Packets { packets }
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}
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pub fn new_with_recycler_data(
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recycler: &PacketsRecycler,
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name: &'static str,
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mut packets: Vec<Packet>,
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) -> Self {
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let mut vec = Self::new_with_recycler(recycler.clone(), packets.len(), name);
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vec.packets.append(&mut packets);
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vec
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}
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pub fn set_addr(&mut self, addr: &SocketAddr) {
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for m in self.packets.iter_mut() {
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m.meta.set_addr(&addr);
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}
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}
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pub fn is_empty(&self) -> bool {
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self.packets.is_empty()
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}
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}
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pub fn to_packets_chunked<T: Serialize>(xs: &[T], chunks: usize) -> Vec<Packets> {
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let mut out = vec![];
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for x in xs.chunks(chunks) {
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let mut p = Packets::default();
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p.packets.resize(x.len(), Packet::default());
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for (i, o) in x.iter().zip(p.packets.iter_mut()) {
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Packet::populate_packet(o, None, i).expect("serialize request");
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}
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out.push(p);
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}
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out
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}
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pub fn to_packets<T: Serialize>(xs: &[T]) -> Vec<Packets> {
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to_packets_chunked(xs, NUM_PACKETS)
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}
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pub fn to_packets_with_destination<T: Serialize>(
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recycler: PacketsRecycler,
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dests_and_data: &[(SocketAddr, T)],
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) -> Packets {
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let mut out = Packets::new_with_recycler(
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recycler,
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dests_and_data.len(),
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"to_packets_with_destination",
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);
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out.packets.resize(dests_and_data.len(), Packet::default());
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for (dest_and_data, o) in dests_and_data.iter().zip(out.packets.iter_mut()) {
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if !dest_and_data.0.ip().is_unspecified() && dest_and_data.0.port() != 0 {
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if let Err(e) = Packet::populate_packet(o, Some(&dest_and_data.0), &dest_and_data.1) {
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error!("Couldn't write to packet {:?}. Data skipped.", e);
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}
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} else {
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trace!("Dropping packet, as destination is unknown");
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}
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}
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out
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}
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pub fn limited_deserialize<T>(data: &[u8]) -> bincode::Result<T>
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where
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T: serde::de::DeserializeOwned,
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{
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bincode::config()
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.limit(PACKET_DATA_SIZE as u64)
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.deserialize(data)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use solana_sdk::hash::Hash;
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use solana_sdk::signature::{Keypair, Signer};
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use solana_sdk::system_transaction;
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#[test]
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fn test_to_packets() {
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let keypair = Keypair::new();
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let hash = Hash::new(&[1; 32]);
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let tx = system_transaction::transfer(&keypair, &keypair.pubkey(), 1, hash);
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let rv = to_packets(&vec![tx.clone(); 1]);
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assert_eq!(rv.len(), 1);
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assert_eq!(rv[0].packets.len(), 1);
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let rv = to_packets(&vec![tx.clone(); NUM_PACKETS]);
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assert_eq!(rv.len(), 1);
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assert_eq!(rv[0].packets.len(), NUM_PACKETS);
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let rv = to_packets(&vec![tx.clone(); NUM_PACKETS + 1]);
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assert_eq!(rv.len(), 2);
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assert_eq!(rv[0].packets.len(), NUM_PACKETS);
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assert_eq!(rv[1].packets.len(), 1);
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}
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#[test]
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fn test_to_packets_pinning() {
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let recycler = PacketsRecycler::default();
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for i in 0..2 {
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let _first_packets = Packets::new_with_recycler(recycler.clone(), i + 1, "first one");
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}
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}
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}
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