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Disable IP fragmentation on Linux

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This commit is contained in:
Benjamin Saunders
2020-03-06 20:01:58 -08:00
parent ee300dcf6e
commit 7a3b4559bb
2 changed files with 34 additions and 1 deletions
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quinn/Cargo.toml
+1 -1
View File
@@ -31,7 +31,7 @@ azure-devops = { project = "dochtman/Projects", pipeline = "Quinn", build = "1"
bytes = "0.5.2"
err-derive = "0.2.3"
futures = "0.3.1"
libc = "0.2.49"
libc = "0.2.67"
mio = "0.6"
proto = { package = "quinn-proto", path = "../quinn-proto", version = "0.5.0" }
rustls = { version = "0.17", features = ["quic"], optional = true }
quinn/src/platform/unix.rs
+33
View File
@@ -53,6 +53,39 @@ impl super::UdpExt for UdpSocket {
return Err(io::Error::last_os_error());
}
}
#[cfg(target_os = "linux")]
{
// TODO: Replace with constants from libc > 0.2.67
const IP_PMTUDISC_PROBE: libc::c_int = 2;
if addr.is_ipv4() {
const IP_MTU_DISCOVER: libc::c_int = 10;
let rc = unsafe {
libc::setsockopt(
self.as_raw_fd(),
libc::IPPROTO_IP,
IP_MTU_DISCOVER,
&IP_PMTUDISC_PROBE as *const _ as _,
mem::size_of_val(&IP_PMTUDISC_PROBE) as _,
)
};
if rc == -1 {
return Err(io::Error::last_os_error());
}
} else if addr.is_ipv6() {
let rc = unsafe {
libc::setsockopt(
self.as_raw_fd(),
libc::IPPROTO_IPV6,
libc::IPV6_MTU_DISCOVER,
&IP_PMTUDISC_PROBE as *const _ as _,
mem::size_of_val(&IP_PMTUDISC_PROBE) as _,
)
};
if rc == -1 {
return Err(io::Error::last_os_error());
}
}
}
if addr.is_ipv6() {
let on: libc::c_int = 1;
let rc = unsafe {