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fix(udp/bench): enforce max 64k UDP datagram limit

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Linux drops UDP datagrams larger than 64k, even when segmented. In other words,
64k - headers is the maximum GSO payload size.
This commit is contained in:
Max Inden
2024-10-23 12:26:36 +02:00
committed by Dirkjan Ochtman
parent a5046add78
commit b5902da5a9
1 changed files with 5 additions and 1 deletions
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quinn-udp/benches/throughput.rs
+5 -1
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@@ -1,4 +1,5 @@
use std::{
cmp::min,
io::{ErrorKind, IoSliceMut},
net::{Ipv4Addr, Ipv6Addr, UdpSocket},
};
@@ -51,7 +52,7 @@ pub fn criterion_benchmark(c: &mut Criterion) {
} else {
1
};
let msg = vec![0xAB; SEGMENT_SIZE * gso_segments];
let msg = vec![0xAB; min(MAX_DATAGRAM_SIZE, SEGMENT_SIZE * gso_segments)];
let transmit = Transmit {
destination: dst_addr,
ecn: None,
@@ -117,3 +118,6 @@ fn new_socket() -> (UdpSocketState, tokio::net::UdpSocket) {
criterion_group!(benches, criterion_benchmark);
criterion_main!(benches);
const MAX_IP_UDP_HEADER_SIZE: usize = 48;
const MAX_DATAGRAM_SIZE: usize = u16::MAX as usize - MAX_IP_UDP_HEADER_SIZE;