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use crate::recvmmsg::{recv_mmsg, NUM_RCVMMSGS};
pub use solana_perf::packet::{
limited_deserialize, to_packets_chunked, Packets, PacketsRecycler, NUM_PACKETS,
PACKETS_PER_BATCH,
};
use solana_metrics::inc_new_counter_debug;
pub use solana_sdk::packet::{Meta, Packet, PACKET_DATA_SIZE};
use std::{io::Result, net::UdpSocket, time::Instant};
pub fn recv_from(obj: &mut Packets, socket: &UdpSocket, max_wait_ms: u64) -> Result<usize> {
let mut i = 0;
socket.set_nonblocking(false)?;
trace!("receiving on {}", socket.local_addr().unwrap());
let start = Instant::now();
loop {
obj.packets.resize(
std::cmp::min(i + NUM_RCVMMSGS, PACKETS_PER_BATCH),
Packet::default(),
);
match recv_mmsg(socket, &mut obj.packets[i..]) {
Err(_) if i > 0 => {
if start.elapsed().as_millis() as u64 > max_wait_ms {
break;
}
}
Err(e) => {
trace!("recv_from err {:?}", e);
return Err(e);
}
Ok((_, npkts)) => {
if i == 0 {
socket.set_nonblocking(true)?;
}
trace!("got {} packets", npkts);
i += npkts;
if start.elapsed().as_millis() as u64 > max_wait_ms || i >= PACKETS_PER_BATCH {
break;
}
}
}
}
obj.packets.truncate(i);
inc_new_counter_debug!("packets-recv_count", i);
Ok(i)
}
pub fn send_to(obj: &Packets, socket: &UdpSocket) -> Result<()> {
for p in &obj.packets {
let a = p.meta.addr();
socket.send_to(&p.data[..p.meta.size], &a)?;
}
Ok(())
}
#[cfg(test)]
mod tests {
use super::*;
use std::io;
use std::io::Write;
use std::net::{SocketAddr, UdpSocket};
#[test]
fn test_packets_set_addr() {
let send_addr: SocketAddr = "127.0.0.1:123".parse().unwrap();
let packets = vec![Packet::default()];
let mut msgs = Packets::new(packets);
msgs.set_addr(&send_addr);
assert_eq!(msgs.packets[0].meta.addr(), send_addr);
}
#[test]
pub fn packet_send_recv() {
solana_logger::setup();
let recv_socket = UdpSocket::bind("127.0.0.1:0").expect("bind");
let addr = recv_socket.local_addr().unwrap();
let send_socket = UdpSocket::bind("127.0.0.1:0").expect("bind");
let saddr = send_socket.local_addr().unwrap();
let mut p = Packets::default();
p.packets.resize(10, Packet::default());
for m in p.packets.iter_mut() {
m.meta.set_addr(&addr);
m.meta.size = PACKET_DATA_SIZE;
}
send_to(&p, &send_socket).unwrap();
let recvd = recv_from(&mut p, &recv_socket, 1).unwrap();
assert_eq!(recvd, p.packets.len());
for m in &p.packets {
assert_eq!(m.meta.size, PACKET_DATA_SIZE);
assert_eq!(m.meta.addr(), saddr);
}
}
#[test]
pub fn debug_trait() {
write!(io::sink(), "{:?}", Packet::default()).unwrap();
write!(io::sink(), "{:?}", Packets::default()).unwrap();
}
#[test]
fn test_packet_partial_eq() {
let mut p1 = Packet::default();
let mut p2 = Packet::default();
p1.meta.size = 1;
p1.data[0] = 0;
p2.meta.size = 1;
p2.data[0] = 0;
assert!(p1 == p2);
p2.data[0] = 4;
assert!(p1 != p2);
}
#[test]
fn test_packet_resize() {
solana_logger::setup();
let recv_socket = UdpSocket::bind("127.0.0.1:0").expect("bind");
let addr = recv_socket.local_addr().unwrap();
let send_socket = UdpSocket::bind("127.0.0.1:0").expect("bind");
let mut p = Packets::default();
p.packets.resize(PACKETS_PER_BATCH, Packet::default());
for _ in 0..2 * PACKETS_PER_BATCH {
let mut p = Packets::default();
p.packets.resize(1, Packet::default());
for m in p.packets.iter_mut() {
m.meta.set_addr(&addr);
m.meta.size = 1;
}
send_to(&p, &send_socket).unwrap();
}
let recvd = recv_from(&mut p, &recv_socket, 100).unwrap();
assert_eq!(recvd, PACKETS_PER_BATCH);
assert_eq!(p.packets.capacity(), PACKETS_PER_BATCH);
}
}